From 07c8adaf7611882f5532b9a259d328d7c8fbc2f1 Mon Sep 17 00:00:00 2001 From: Ronni Skansing Date: Thu, 6 Nov 2025 23:31:08 +0100 Subject: [PATCH] update vendor deps Signed-off-by: Ronni Skansing --- .../Masterminds/semver/v3/.gitignore | 1 + .../Masterminds/semver/v3/.golangci.yml | 27 + .../Masterminds/semver/v3/CHANGELOG.md | 268 + .../Masterminds/semver/v3/LICENSE.txt | 19 + .../github.com/Masterminds/semver/v3/Makefile | 31 + .../Masterminds/semver/v3/README.md | 274 + .../Masterminds/semver/v3/SECURITY.md | 19 + .../Masterminds/semver/v3/collection.go | 24 + .../Masterminds/semver/v3/constraints.go | 601 + .../github.com/Masterminds/semver/v3/doc.go | 184 + .../Masterminds/semver/v3/version.go | 788 + .../github.com/andybalholm/brotli/.gitignore | 2 + .../github.com/andybalholm/brotli/LICENSE | 19 + .../github.com/andybalholm/brotli/README.md | 14 + .../andybalholm/brotli/backward_references.go | 185 + .../brotli/backward_references_hq.go | 796 + 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backend/vendor/google.golang.org/protobuf/reflect/protoreflect/value_unsafe.go diff --git a/backend/vendor/github.com/Masterminds/semver/v3/.gitignore b/backend/vendor/github.com/Masterminds/semver/v3/.gitignore new file mode 100644 index 0000000..6b061e6 --- /dev/null +++ b/backend/vendor/github.com/Masterminds/semver/v3/.gitignore @@ -0,0 +1 @@ +_fuzz/ \ No newline at end of file diff --git a/backend/vendor/github.com/Masterminds/semver/v3/.golangci.yml b/backend/vendor/github.com/Masterminds/semver/v3/.golangci.yml new file mode 100644 index 0000000..fbc6332 --- /dev/null +++ b/backend/vendor/github.com/Masterminds/semver/v3/.golangci.yml @@ -0,0 +1,27 @@ +run: + deadline: 2m + +linters: + disable-all: true + enable: + - misspell + - govet + - staticcheck + - errcheck + - unparam + - ineffassign + - nakedret + - gocyclo + - dupl + - goimports + - revive + - gosec + - gosimple + - typecheck + - unused + +linters-settings: + gofmt: + simplify: true + dupl: + threshold: 600 diff --git a/backend/vendor/github.com/Masterminds/semver/v3/CHANGELOG.md b/backend/vendor/github.com/Masterminds/semver/v3/CHANGELOG.md new file mode 100644 index 0000000..fabe5e4 --- /dev/null +++ b/backend/vendor/github.com/Masterminds/semver/v3/CHANGELOG.md @@ -0,0 +1,268 @@ +# Changelog + +## 3.4.0 (2025-06-27) + +### Added + +- #268: Added property to Constraints to include prereleases for Check and Validate + +### Changed + +- #263: Updated Go testing for 1.24, 1.23, and 1.22 +- #269: Updated the error message handling for message case and wrapping errors +- #266: Restore the ability to have leading 0's when parsing with NewVersion. + Opt-out of this by setting CoerceNewVersion to false. + +### Fixed + +- #257: Fixed the CodeQL link (thanks @dmitris) +- #262: Restored detailed errors when failed to parse with NewVersion. Opt-out + of this by setting DetailedNewVersionErrors to false for faster performance. +- #267: Handle pre-releases for an "and" group if one constraint includes them + +## 3.3.1 (2024-11-19) + +### Fixed + +- #253: Fix for allowing some version that were invalid + +## 3.3.0 (2024-08-27) + +### Added + +- #238: Add LessThanEqual and GreaterThanEqual functions (thanks @grosser) +- #213: nil version equality checking (thanks @KnutZuidema) + +### Changed + +- #241: Simplify StrictNewVersion parsing (thanks @grosser) +- Testing support up through Go 1.23 +- Minimum version set to 1.21 as this is what's tested now +- Fuzz testing now supports caching + +## 3.2.1 (2023-04-10) + +### Changed + +- #198: Improved testing around pre-release names +- #200: Improved code scanning with addition of CodeQL +- #201: Testing now includes Go 1.20. Go 1.17 has been dropped +- #202: Migrated Fuzz testing to Go built-in Fuzzing. CI runs daily +- #203: Docs updated for security details + +### Fixed + +- #199: Fixed issue with range transformations + +## 3.2.0 (2022-11-28) + +### Added + +- #190: Added text marshaling and unmarshaling +- #167: Added JSON marshalling for constraints (thanks @SimonTheLeg) +- #173: Implement encoding.TextMarshaler and encoding.TextUnmarshaler on Version (thanks @MarkRosemaker) +- #179: Added New() version constructor (thanks @kazhuravlev) + +### Changed + +- #182/#183: Updated CI testing setup + +### Fixed + +- #186: Fixing issue where validation of constraint section gave false positives +- #176: Fix constraints check with *-0 (thanks @mtt0) +- #181: Fixed Caret operator (^) gives unexpected results when the minor version in constraint is 0 (thanks @arshchimni) +- #161: Fixed godoc (thanks @afirth) + +## 3.1.1 (2020-11-23) + +### Fixed + +- #158: Fixed issue with generated regex operation order that could cause problem + +## 3.1.0 (2020-04-15) + +### Added + +- #131: Add support for serializing/deserializing SQL (thanks @ryancurrah) + +### Changed + +- #148: More accurate validation messages on constraints + +## 3.0.3 (2019-12-13) + +### Fixed + +- #141: Fixed issue with <= comparison + +## 3.0.2 (2019-11-14) + +### Fixed + +- #134: Fixed broken constraint checking with ^0.0 (thanks @krmichelos) + +## 3.0.1 (2019-09-13) + +### Fixed + +- #125: Fixes issue with module path for v3 + +## 3.0.0 (2019-09-12) + +This is a major release of the semver package which includes API changes. The Go +API is compatible with ^1. The Go API was not changed because many people are using +`go get` without Go modules for their applications and API breaking changes cause +errors which we have or would need to support. + +The changes in this release are the handling based on the data passed into the +functions. These are described in the added and changed sections below. + +### Added + +- StrictNewVersion function. This is similar to NewVersion but will return an + error if the version passed in is not a strict semantic version. For example, + 1.2.3 would pass but v1.2.3 or 1.2 would fail because they are not strictly + speaking semantic versions. This function is faster, performs fewer operations, + and uses fewer allocations than NewVersion. +- Fuzzing has been performed on NewVersion, StrictNewVersion, and NewConstraint. + The Makefile contains the operations used. For more information on you can start + on Wikipedia at https://en.wikipedia.org/wiki/Fuzzing +- Now using Go modules + +### Changed + +- NewVersion has proper prerelease and metadata validation with error messages + to signal an issue with either of them +- ^ now operates using a similar set of rules to npm/js and Rust/Cargo. If the + version is >=1 the ^ ranges works the same as v1. For major versions of 0 the + rules have changed. The minor version is treated as the stable version unless + a patch is specified and then it is equivalent to =. One difference from npm/js + is that prereleases there are only to a specific version (e.g. 1.2.3). + Prereleases here look over multiple versions and follow semantic version + ordering rules. This pattern now follows along with the expected and requested + handling of this packaged by numerous users. + +## 1.5.0 (2019-09-11) + +### Added + +- #103: Add basic fuzzing for `NewVersion()` (thanks @jesse-c) + +### Changed + +- #82: Clarify wildcard meaning in range constraints and update tests for it (thanks @greysteil) +- #83: Clarify caret operator range for pre-1.0.0 dependencies (thanks @greysteil) +- #72: Adding docs comment pointing to vert for a cli +- #71: Update the docs on pre-release comparator handling +- #89: Test with new go versions (thanks @thedevsaddam) +- #87: Added $ to ValidPrerelease for better validation (thanks @jeremycarroll) + +### Fixed + +- #78: Fix unchecked error in example code (thanks @ravron) +- #70: Fix the handling of pre-releases and the 0.0.0 release edge case +- #97: Fixed copyright file for proper display on GitHub +- #107: Fix handling prerelease when sorting alphanum and num +- #109: Fixed where Validate sometimes returns wrong message on error + +## 1.4.2 (2018-04-10) + +### Changed + +- #72: Updated the docs to point to vert for a console appliaction +- #71: Update the docs on pre-release comparator handling + +### Fixed + +- #70: Fix the handling of pre-releases and the 0.0.0 release edge case + +## 1.4.1 (2018-04-02) + +### Fixed + +- Fixed #64: Fix pre-release precedence issue (thanks @uudashr) + +## 1.4.0 (2017-10-04) + +### Changed + +- #61: Update NewVersion to parse ints with a 64bit int size (thanks @zknill) + +## 1.3.1 (2017-07-10) + +### Fixed + +- Fixed #57: number comparisons in prerelease sometimes inaccurate + +## 1.3.0 (2017-05-02) + +### Added + +- #45: Added json (un)marshaling support (thanks @mh-cbon) +- Stability marker. See https://masterminds.github.io/stability/ + +### Fixed + +- #51: Fix handling of single digit tilde constraint (thanks @dgodd) + +### Changed + +- #55: The godoc icon moved from png to svg + +## 1.2.3 (2017-04-03) + +### Fixed + +- #46: Fixed 0.x.x and 0.0.x in constraints being treated as * + +## Release 1.2.2 (2016-12-13) + +### Fixed + +- #34: Fixed issue where hyphen range was not working with pre-release parsing. + +## Release 1.2.1 (2016-11-28) + +### Fixed + +- #24: Fixed edge case issue where constraint "> 0" does not handle "0.0.1-alpha" + properly. + +## Release 1.2.0 (2016-11-04) + +### Added + +- #20: Added MustParse function for versions (thanks @adamreese) +- #15: Added increment methods on versions (thanks @mh-cbon) + +### Fixed + +- Issue #21: Per the SemVer spec (section 9) a pre-release is unstable and + might not satisfy the intended compatibility. The change here ignores pre-releases + on constraint checks (e.g., ~ or ^) when a pre-release is not part of the + constraint. For example, `^1.2.3` will ignore pre-releases while + `^1.2.3-alpha` will include them. + +## Release 1.1.1 (2016-06-30) + +### Changed + +- Issue #9: Speed up version comparison performance (thanks @sdboyer) +- Issue #8: Added benchmarks (thanks @sdboyer) +- Updated Go Report Card URL to new location +- Updated Readme to add code snippet formatting (thanks @mh-cbon) +- Updating tagging to v[SemVer] structure for compatibility with other tools. + +## Release 1.1.0 (2016-03-11) + +- Issue #2: Implemented validation to provide reasons a versions failed a + constraint. + +## Release 1.0.1 (2015-12-31) + +- Fixed #1: * constraint failing on valid versions. + +## Release 1.0.0 (2015-10-20) + +- Initial release diff --git a/backend/vendor/github.com/Masterminds/semver/v3/LICENSE.txt b/backend/vendor/github.com/Masterminds/semver/v3/LICENSE.txt new file mode 100644 index 0000000..9ff7da9 --- /dev/null +++ b/backend/vendor/github.com/Masterminds/semver/v3/LICENSE.txt @@ -0,0 +1,19 @@ +Copyright (C) 2014-2019, Matt Butcher and Matt Farina + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. diff --git a/backend/vendor/github.com/Masterminds/semver/v3/Makefile b/backend/vendor/github.com/Masterminds/semver/v3/Makefile new file mode 100644 index 0000000..9ca87a2 --- /dev/null +++ b/backend/vendor/github.com/Masterminds/semver/v3/Makefile @@ -0,0 +1,31 @@ +GOPATH=$(shell go env GOPATH) +GOLANGCI_LINT=$(GOPATH)/bin/golangci-lint + +.PHONY: lint +lint: $(GOLANGCI_LINT) + @echo "==> Linting codebase" + @$(GOLANGCI_LINT) run + +.PHONY: test +test: + @echo "==> Running tests" + GO111MODULE=on go test -v + +.PHONY: test-cover +test-cover: + @echo "==> Running Tests with coverage" + GO111MODULE=on go test -cover . + +.PHONY: fuzz +fuzz: + @echo "==> Running Fuzz Tests" + go env GOCACHE + go test -fuzz=FuzzNewVersion -fuzztime=15s . + go test -fuzz=FuzzStrictNewVersion -fuzztime=15s . + go test -fuzz=FuzzNewConstraint -fuzztime=15s . + +$(GOLANGCI_LINT): + # Install golangci-lint. The configuration for it is in the .golangci.yml + # file in the root of the repository + echo ${GOPATH} + curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(GOPATH)/bin v1.56.2 diff --git a/backend/vendor/github.com/Masterminds/semver/v3/README.md b/backend/vendor/github.com/Masterminds/semver/v3/README.md new file mode 100644 index 0000000..2f56c67 --- /dev/null +++ b/backend/vendor/github.com/Masterminds/semver/v3/README.md @@ -0,0 +1,274 @@ +# SemVer + +The `semver` package provides the ability to work with [Semantic Versions](http://semver.org) in Go. Specifically it provides the ability to: + +* Parse semantic versions +* Sort semantic versions +* Check if a semantic version fits within a set of constraints +* Optionally work with a `v` prefix + +[![Stability: +Active](https://masterminds.github.io/stability/active.svg)](https://masterminds.github.io/stability/active.html) +[![](https://github.com/Masterminds/semver/workflows/Tests/badge.svg)](https://github.com/Masterminds/semver/actions) +[![GoDoc](https://img.shields.io/static/v1?label=godoc&message=reference&color=blue)](https://pkg.go.dev/github.com/Masterminds/semver/v3) +[![Go Report Card](https://goreportcard.com/badge/github.com/Masterminds/semver)](https://goreportcard.com/report/github.com/Masterminds/semver) + +## Package Versions + +Note, import `github.com/Masterminds/semver/v3` to use the latest version. + +There are three major versions fo the `semver` package. + +* 3.x.x is the stable and active version. This version is focused on constraint + compatibility for range handling in other tools from other languages. It has + a similar API to the v1 releases. The development of this version is on the master + branch. The documentation for this version is below. +* 2.x was developed primarily for [dep](https://github.com/golang/dep). There are + no tagged releases and the development was performed by [@sdboyer](https://github.com/sdboyer). + There are API breaking changes from v1. This version lives on the [2.x branch](https://github.com/Masterminds/semver/tree/2.x). +* 1.x.x is the original release. It is no longer maintained. You should use the + v3 release instead. You can read the documentation for the 1.x.x release + [here](https://github.com/Masterminds/semver/blob/release-1/README.md). + +## Parsing Semantic Versions + +There are two functions that can parse semantic versions. The `StrictNewVersion` +function only parses valid version 2 semantic versions as outlined in the +specification. The `NewVersion` function attempts to coerce a version into a +semantic version and parse it. For example, if there is a leading v or a version +listed without all 3 parts (e.g. `v1.2`) it will attempt to coerce it into a valid +semantic version (e.g., 1.2.0). In both cases a `Version` object is returned +that can be sorted, compared, and used in constraints. + +When parsing a version an error is returned if there is an issue parsing the +version. For example, + + v, err := semver.NewVersion("1.2.3-beta.1+build345") + +The version object has methods to get the parts of the version, compare it to +other versions, convert the version back into a string, and get the original +string. Getting the original string is useful if the semantic version was coerced +into a valid form. + +There are package level variables that affect how `NewVersion` handles parsing. + +- `CoerceNewVersion` is `true` by default. When set to `true` it coerces non-compliant + versions into SemVer. For example, allowing a leading 0 in a major, minor, or patch + part. This enables the use of CalVer in versions even when not compliant with SemVer. + When set to `false` less coercion work is done. +- `DetailedNewVersionErrors` provides more detailed errors. It only has an affect when + `CoerceNewVersion` is set to `false`. When `DetailedNewVersionErrors` is set to `true` + it can provide some more insight into why a version is invalid. Setting + `DetailedNewVersionErrors` to `false` is faster on performance but provides less + detailed error messages if a version fails to parse. + +## Sorting Semantic Versions + +A set of versions can be sorted using the `sort` package from the standard library. +For example, + +```go +raw := []string{"1.2.3", "1.0", "1.3", "2", "0.4.2",} +vs := make([]*semver.Version, len(raw)) +for i, r := range raw { + v, err := semver.NewVersion(r) + if err != nil { + t.Errorf("Error parsing version: %s", err) + } + + vs[i] = v +} + +sort.Sort(semver.Collection(vs)) +``` + +## Checking Version Constraints + +There are two methods for comparing versions. One uses comparison methods on +`Version` instances and the other uses `Constraints`. There are some important +differences to notes between these two methods of comparison. + +1. When two versions are compared using functions such as `Compare`, `LessThan`, + and others it will follow the specification and always include pre-releases + within the comparison. It will provide an answer that is valid with the + comparison section of the spec at https://semver.org/#spec-item-11 +2. When constraint checking is used for checks or validation it will follow a + different set of rules that are common for ranges with tools like npm/js + and Rust/Cargo. This includes considering pre-releases to be invalid if the + ranges does not include one. If you want to have it include pre-releases a + simple solution is to include `-0` in your range. +3. Constraint ranges can have some complex rules including the shorthand use of + ~ and ^. For more details on those see the options below. + +There are differences between the two methods or checking versions because the +comparison methods on `Version` follow the specification while comparison ranges +are not part of the specification. Different packages and tools have taken it +upon themselves to come up with range rules. This has resulted in differences. +For example, npm/js and Cargo/Rust follow similar patterns while PHP has a +different pattern for ^. The comparison features in this package follow the +npm/js and Cargo/Rust lead because applications using it have followed similar +patters with their versions. + +Checking a version against version constraints is one of the most featureful +parts of the package. + +```go +c, err := semver.NewConstraint(">= 1.2.3") +if err != nil { + // Handle constraint not being parsable. +} + +v, err := semver.NewVersion("1.3") +if err != nil { + // Handle version not being parsable. +} +// Check if the version meets the constraints. The variable a will be true. +a := c.Check(v) +``` + +### Basic Comparisons + +There are two elements to the comparisons. First, a comparison string is a list +of space or comma separated AND comparisons. These are then separated by || (OR) +comparisons. For example, `">= 1.2 < 3.0.0 || >= 4.2.3"` is looking for a +comparison that's greater than or equal to 1.2 and less than 3.0.0 or is +greater than or equal to 4.2.3. + +The basic comparisons are: + +* `=`: equal (aliased to no operator) +* `!=`: not equal +* `>`: greater than +* `<`: less than +* `>=`: greater than or equal to +* `<=`: less than or equal to + +### Working With Prerelease Versions + +Pre-releases, for those not familiar with them, are used for software releases +prior to stable or generally available releases. Examples of pre-releases include +development, alpha, beta, and release candidate releases. A pre-release may be +a version such as `1.2.3-beta.1` while the stable release would be `1.2.3`. In the +order of precedence, pre-releases come before their associated releases. In this +example `1.2.3-beta.1 < 1.2.3`. + +According to the Semantic Version specification, pre-releases may not be +API compliant with their release counterpart. It says, + +> A pre-release version indicates that the version is unstable and might not satisfy the intended compatibility requirements as denoted by its associated normal version. + +SemVer's comparisons using constraints without a pre-release comparator will skip +pre-release versions. For example, `>=1.2.3` will skip pre-releases when looking +at a list of releases while `>=1.2.3-0` will evaluate and find pre-releases. + +The reason for the `0` as a pre-release version in the example comparison is +because pre-releases can only contain ASCII alphanumerics and hyphens (along with +`.` separators), per the spec. Sorting happens in ASCII sort order, again per the +spec. The lowest character is a `0` in ASCII sort order +(see an [ASCII Table](http://www.asciitable.com/)) + +Understanding ASCII sort ordering is important because A-Z comes before a-z. That +means `>=1.2.3-BETA` will return `1.2.3-alpha`. What you might expect from case +sensitivity doesn't apply here. This is due to ASCII sort ordering which is what +the spec specifies. + +The `Constraints` instance returned from `semver.NewConstraint()` has a property +`IncludePrerelease` that, when set to true, will return prerelease versions when calls +to `Check()` and `Validate()` are made. + +### Hyphen Range Comparisons + +There are multiple methods to handle ranges and the first is hyphens ranges. +These look like: + +* `1.2 - 1.4.5` which is equivalent to `>= 1.2 <= 1.4.5` +* `2.3.4 - 4.5` which is equivalent to `>= 2.3.4 <= 4.5` + +Note that `1.2-1.4.5` without whitespace is parsed completely differently; it's +parsed as a single constraint `1.2.0` with _prerelease_ `1.4.5`. + +### Wildcards In Comparisons + +The `x`, `X`, and `*` characters can be used as a wildcard character. This works +for all comparison operators. When used on the `=` operator it falls +back to the patch level comparison (see tilde below). For example, + +* `1.2.x` is equivalent to `>= 1.2.0, < 1.3.0` +* `>= 1.2.x` is equivalent to `>= 1.2.0` +* `<= 2.x` is equivalent to `< 3` +* `*` is equivalent to `>= 0.0.0` + +### Tilde Range Comparisons (Patch) + +The tilde (`~`) comparison operator is for patch level ranges when a minor +version is specified and major level changes when the minor number is missing. +For example, + +* `~1.2.3` is equivalent to `>= 1.2.3, < 1.3.0` +* `~1` is equivalent to `>= 1, < 2` +* `~2.3` is equivalent to `>= 2.3, < 2.4` +* `~1.2.x` is equivalent to `>= 1.2.0, < 1.3.0` +* `~1.x` is equivalent to `>= 1, < 2` + +### Caret Range Comparisons (Major) + +The caret (`^`) comparison operator is for major level changes once a stable +(1.0.0) release has occurred. Prior to a 1.0.0 release the minor versions acts +as the API stability level. This is useful when comparisons of API versions as a +major change is API breaking. For example, + +* `^1.2.3` is equivalent to `>= 1.2.3, < 2.0.0` +* `^1.2.x` is equivalent to `>= 1.2.0, < 2.0.0` +* `^2.3` is equivalent to `>= 2.3, < 3` +* `^2.x` is equivalent to `>= 2.0.0, < 3` +* `^0.2.3` is equivalent to `>=0.2.3 <0.3.0` +* `^0.2` is equivalent to `>=0.2.0 <0.3.0` +* `^0.0.3` is equivalent to `>=0.0.3 <0.0.4` +* `^0.0` is equivalent to `>=0.0.0 <0.1.0` +* `^0` is equivalent to `>=0.0.0 <1.0.0` + +## Validation + +In addition to testing a version against a constraint, a version can be validated +against a constraint. When validation fails a slice of errors containing why a +version didn't meet the constraint is returned. For example, + +```go +c, err := semver.NewConstraint("<= 1.2.3, >= 1.4") +if err != nil { + // Handle constraint not being parseable. +} + +v, err := semver.NewVersion("1.3") +if err != nil { + // Handle version not being parseable. +} + +// Validate a version against a constraint. +a, msgs := c.Validate(v) +// a is false +for _, m := range msgs { + fmt.Println(m) + + // Loops over the errors which would read + // "1.3 is greater than 1.2.3" + // "1.3 is less than 1.4" +} +``` + +## Contribute + +If you find an issue or want to contribute please file an [issue](https://github.com/Masterminds/semver/issues) +or [create a pull request](https://github.com/Masterminds/semver/pulls). + +## Security + +Security is an important consideration for this project. The project currently +uses the following tools to help discover security issues: + +* [CodeQL](https://codeql.github.com) +* [gosec](https://github.com/securego/gosec) +* Daily Fuzz testing + +If you believe you have found a security vulnerability you can privately disclose +it through the [GitHub security page](https://github.com/Masterminds/semver/security). diff --git a/backend/vendor/github.com/Masterminds/semver/v3/SECURITY.md b/backend/vendor/github.com/Masterminds/semver/v3/SECURITY.md new file mode 100644 index 0000000..a30a66b --- /dev/null +++ b/backend/vendor/github.com/Masterminds/semver/v3/SECURITY.md @@ -0,0 +1,19 @@ +# Security Policy + +## Supported Versions + +The following versions of semver are currently supported: + +| Version | Supported | +| ------- | ------------------ | +| 3.x | :white_check_mark: | +| 2.x | :x: | +| 1.x | :x: | + +Fixes are only released for the latest minor version in the form of a patch release. + +## Reporting a Vulnerability + +You can privately disclose a vulnerability through GitHubs +[private vulnerability reporting](https://github.com/Masterminds/semver/security/advisories) +mechanism. diff --git a/backend/vendor/github.com/Masterminds/semver/v3/collection.go b/backend/vendor/github.com/Masterminds/semver/v3/collection.go new file mode 100644 index 0000000..a782358 --- /dev/null +++ b/backend/vendor/github.com/Masterminds/semver/v3/collection.go @@ -0,0 +1,24 @@ +package semver + +// Collection is a collection of Version instances and implements the sort +// interface. See the sort package for more details. +// https://golang.org/pkg/sort/ +type Collection []*Version + +// Len returns the length of a collection. The number of Version instances +// on the slice. +func (c Collection) Len() int { + return len(c) +} + +// Less is needed for the sort interface to compare two Version objects on the +// slice. If checks if one is less than the other. +func (c Collection) Less(i, j int) bool { + return c[i].LessThan(c[j]) +} + +// Swap is needed for the sort interface to replace the Version objects +// at two different positions in the slice. +func (c Collection) Swap(i, j int) { + c[i], c[j] = c[j], c[i] +} diff --git a/backend/vendor/github.com/Masterminds/semver/v3/constraints.go b/backend/vendor/github.com/Masterminds/semver/v3/constraints.go new file mode 100644 index 0000000..8b7a10f --- /dev/null +++ b/backend/vendor/github.com/Masterminds/semver/v3/constraints.go @@ -0,0 +1,601 @@ +package semver + +import ( + "bytes" + "errors" + "fmt" + "regexp" + "strings" +) + +// Constraints is one or more constraint that a semantic version can be +// checked against. +type Constraints struct { + constraints [][]*constraint + containsPre []bool + + // IncludePrerelease specifies if pre-releases should be included in + // the results. Note, if a constraint range has a prerelease than + // prereleases will be included for that AND group even if this is + // set to false. + IncludePrerelease bool +} + +// NewConstraint returns a Constraints instance that a Version instance can +// be checked against. If there is a parse error it will be returned. +func NewConstraint(c string) (*Constraints, error) { + + // Rewrite - ranges into a comparison operation. + c = rewriteRange(c) + + ors := strings.Split(c, "||") + lenors := len(ors) + or := make([][]*constraint, lenors) + hasPre := make([]bool, lenors) + for k, v := range ors { + // Validate the segment + if !validConstraintRegex.MatchString(v) { + return nil, fmt.Errorf("improper constraint: %s", v) + } + + cs := findConstraintRegex.FindAllString(v, -1) + if cs == nil { + cs = append(cs, v) + } + result := make([]*constraint, len(cs)) + for i, s := range cs { + pc, err := parseConstraint(s) + if err != nil { + return nil, err + } + + // If one of the constraints has a prerelease record this. + // This information is used when checking all in an "and" + // group to ensure they all check for prereleases. + if pc.con.pre != "" { + hasPre[k] = true + } + + result[i] = pc + } + or[k] = result + } + + o := &Constraints{ + constraints: or, + containsPre: hasPre, + } + return o, nil +} + +// Check tests if a version satisfies the constraints. +func (cs Constraints) Check(v *Version) bool { + // TODO(mattfarina): For v4 of this library consolidate the Check and Validate + // functions as the underlying functions make that possible now. + // loop over the ORs and check the inner ANDs + for i, o := range cs.constraints { + joy := true + for _, c := range o { + if check, _ := c.check(v, (cs.IncludePrerelease || cs.containsPre[i])); !check { + joy = false + break + } + } + + if joy { + return true + } + } + + return false +} + +// Validate checks if a version satisfies a constraint. If not a slice of +// reasons for the failure are returned in addition to a bool. +func (cs Constraints) Validate(v *Version) (bool, []error) { + // loop over the ORs and check the inner ANDs + var e []error + + // Capture the prerelease message only once. When it happens the first time + // this var is marked + var prerelesase bool + for i, o := range cs.constraints { + joy := true + for _, c := range o { + // Before running the check handle the case there the version is + // a prerelease and the check is not searching for prereleases. + if !(cs.IncludePrerelease || cs.containsPre[i]) && v.pre != "" { + if !prerelesase { + em := fmt.Errorf("%s is a prerelease version and the constraint is only looking for release versions", v) + e = append(e, em) + prerelesase = true + } + joy = false + + } else { + + if _, err := c.check(v, (cs.IncludePrerelease || cs.containsPre[i])); err != nil { + e = append(e, err) + joy = false + } + } + } + + if joy { + return true, []error{} + } + } + + return false, e +} + +func (cs Constraints) String() string { + buf := make([]string, len(cs.constraints)) + var tmp bytes.Buffer + + for k, v := range cs.constraints { + tmp.Reset() + vlen := len(v) + for kk, c := range v { + tmp.WriteString(c.string()) + + // Space separate the AND conditions + if vlen > 1 && kk < vlen-1 { + tmp.WriteString(" ") + } + } + buf[k] = tmp.String() + } + + return strings.Join(buf, " || ") +} + +// UnmarshalText implements the encoding.TextUnmarshaler interface. +func (cs *Constraints) UnmarshalText(text []byte) error { + temp, err := NewConstraint(string(text)) + if err != nil { + return err + } + + *cs = *temp + + return nil +} + +// MarshalText implements the encoding.TextMarshaler interface. +func (cs Constraints) MarshalText() ([]byte, error) { + return []byte(cs.String()), nil +} + +var constraintOps map[string]cfunc +var constraintRegex *regexp.Regexp +var constraintRangeRegex *regexp.Regexp + +// Used to find individual constraints within a multi-constraint string +var findConstraintRegex *regexp.Regexp + +// Used to validate an segment of ANDs is valid +var validConstraintRegex *regexp.Regexp + +const cvRegex string = `v?([0-9|x|X|\*]+)(\.[0-9|x|X|\*]+)?(\.[0-9|x|X|\*]+)?` + + `(-([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?` + + `(\+([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?` + +func init() { + constraintOps = map[string]cfunc{ + "": constraintTildeOrEqual, + "=": constraintTildeOrEqual, + "!=": constraintNotEqual, + ">": constraintGreaterThan, + "<": constraintLessThan, + ">=": constraintGreaterThanEqual, + "=>": constraintGreaterThanEqual, + "<=": constraintLessThanEqual, + "=<": constraintLessThanEqual, + "~": constraintTilde, + "~>": constraintTilde, + "^": constraintCaret, + } + + ops := `=||!=|>|<|>=|=>|<=|=<|~|~>|\^` + + constraintRegex = regexp.MustCompile(fmt.Sprintf( + `^\s*(%s)\s*(%s)\s*$`, + ops, + cvRegex)) + + constraintRangeRegex = regexp.MustCompile(fmt.Sprintf( + `\s*(%s)\s+-\s+(%s)\s*`, + cvRegex, cvRegex)) + + findConstraintRegex = regexp.MustCompile(fmt.Sprintf( + `(%s)\s*(%s)`, + ops, + cvRegex)) + + // The first time a constraint shows up will look slightly different from + // future times it shows up due to a leading space or comma in a given + // string. + validConstraintRegex = regexp.MustCompile(fmt.Sprintf( + `^(\s*(%s)\s*(%s)\s*)((?:\s+|,\s*)(%s)\s*(%s)\s*)*$`, + ops, + cvRegex, + ops, + cvRegex)) +} + +// An individual constraint +type constraint struct { + // The version used in the constraint check. For example, if a constraint + // is '<= 2.0.0' the con a version instance representing 2.0.0. + con *Version + + // The original parsed version (e.g., 4.x from != 4.x) + orig string + + // The original operator for the constraint + origfunc string + + // When an x is used as part of the version (e.g., 1.x) + minorDirty bool + dirty bool + patchDirty bool +} + +// Check if a version meets the constraint +func (c *constraint) check(v *Version, includePre bool) (bool, error) { + return constraintOps[c.origfunc](v, c, includePre) +} + +// String prints an individual constraint into a string +func (c *constraint) string() string { + return c.origfunc + c.orig +} + +type cfunc func(v *Version, c *constraint, includePre bool) (bool, error) + +func parseConstraint(c string) (*constraint, error) { + if len(c) > 0 { + m := constraintRegex.FindStringSubmatch(c) + if m == nil { + return nil, fmt.Errorf("improper constraint: %s", c) + } + + cs := &constraint{ + orig: m[2], + origfunc: m[1], + } + + ver := m[2] + minorDirty := false + patchDirty := false + dirty := false + if isX(m[3]) || m[3] == "" { + ver = fmt.Sprintf("0.0.0%s", m[6]) + dirty = true + } else if isX(strings.TrimPrefix(m[4], ".")) || m[4] == "" { + minorDirty = true + dirty = true + ver = fmt.Sprintf("%s.0.0%s", m[3], m[6]) + } else if isX(strings.TrimPrefix(m[5], ".")) || m[5] == "" { + dirty = true + patchDirty = true + ver = fmt.Sprintf("%s%s.0%s", m[3], m[4], m[6]) + } + + con, err := NewVersion(ver) + if err != nil { + + // The constraintRegex should catch any regex parsing errors. So, + // we should never get here. + return nil, errors.New("constraint parser error") + } + + cs.con = con + cs.minorDirty = minorDirty + cs.patchDirty = patchDirty + cs.dirty = dirty + + return cs, nil + } + + // The rest is the special case where an empty string was passed in which + // is equivalent to * or >=0.0.0 + con, err := StrictNewVersion("0.0.0") + if err != nil { + + // The constraintRegex should catch any regex parsing errors. So, + // we should never get here. + return nil, errors.New("constraint parser error") + } + + cs := &constraint{ + con: con, + orig: c, + origfunc: "", + minorDirty: false, + patchDirty: false, + dirty: true, + } + return cs, nil +} + +// Constraint functions +func constraintNotEqual(v *Version, c *constraint, includePre bool) (bool, error) { + // The existence of prereleases is checked at the group level and passed in. + // Exit early if the version has a prerelease but those are to be ignored. + if v.Prerelease() != "" && !includePre { + return false, fmt.Errorf("%s is a prerelease version and the constraint is only looking for release versions", v) + } + + if c.dirty { + if c.con.Major() != v.Major() { + return true, nil + } + if c.con.Minor() != v.Minor() && !c.minorDirty { + return true, nil + } else if c.minorDirty { + return false, fmt.Errorf("%s is equal to %s", v, c.orig) + } else if c.con.Patch() != v.Patch() && !c.patchDirty { + return true, nil + } else if c.patchDirty { + // Need to handle prereleases if present + if v.Prerelease() != "" || c.con.Prerelease() != "" { + eq := comparePrerelease(v.Prerelease(), c.con.Prerelease()) != 0 + if eq { + return true, nil + } + return false, fmt.Errorf("%s is equal to %s", v, c.orig) + } + return false, fmt.Errorf("%s is equal to %s", v, c.orig) + } + } + + eq := v.Equal(c.con) + if eq { + return false, fmt.Errorf("%s is equal to %s", v, c.orig) + } + + return true, nil +} + +func constraintGreaterThan(v *Version, c *constraint, includePre bool) (bool, error) { + + // The existence of prereleases is checked at the group level and passed in. + // Exit early if the version has a prerelease but those are to be ignored. + if v.Prerelease() != "" && !includePre { + return false, fmt.Errorf("%s is a prerelease version and the constraint is only looking for release versions", v) + } + + var eq bool + + if !c.dirty { + eq = v.Compare(c.con) == 1 + if eq { + return true, nil + } + return false, fmt.Errorf("%s is less than or equal to %s", v, c.orig) + } + + if v.Major() > c.con.Major() { + return true, nil + } else if v.Major() < c.con.Major() { + return false, fmt.Errorf("%s is less than or equal to %s", v, c.orig) + } else if c.minorDirty { + // This is a range case such as >11. When the version is something like + // 11.1.0 is it not > 11. For that we would need 12 or higher + return false, fmt.Errorf("%s is less than or equal to %s", v, c.orig) + } else if c.patchDirty { + // This is for ranges such as >11.1. A version of 11.1.1 is not greater + // which one of 11.2.1 is greater + eq = v.Minor() > c.con.Minor() + if eq { + return true, nil + } + return false, fmt.Errorf("%s is less than or equal to %s", v, c.orig) + } + + // If we have gotten here we are not comparing pre-preleases and can use the + // Compare function to accomplish that. + eq = v.Compare(c.con) == 1 + if eq { + return true, nil + } + return false, fmt.Errorf("%s is less than or equal to %s", v, c.orig) +} + +func constraintLessThan(v *Version, c *constraint, includePre bool) (bool, error) { + // The existence of prereleases is checked at the group level and passed in. + // Exit early if the version has a prerelease but those are to be ignored. + if v.Prerelease() != "" && !includePre { + return false, fmt.Errorf("%s is a prerelease version and the constraint is only looking for release versions", v) + } + + eq := v.Compare(c.con) < 0 + if eq { + return true, nil + } + return false, fmt.Errorf("%s is greater than or equal to %s", v, c.orig) +} + +func constraintGreaterThanEqual(v *Version, c *constraint, includePre bool) (bool, error) { + + // The existence of prereleases is checked at the group level and passed in. + // Exit early if the version has a prerelease but those are to be ignored. + if v.Prerelease() != "" && !includePre { + return false, fmt.Errorf("%s is a prerelease version and the constraint is only looking for release versions", v) + } + + eq := v.Compare(c.con) >= 0 + if eq { + return true, nil + } + return false, fmt.Errorf("%s is less than %s", v, c.orig) +} + +func constraintLessThanEqual(v *Version, c *constraint, includePre bool) (bool, error) { + // The existence of prereleases is checked at the group level and passed in. + // Exit early if the version has a prerelease but those are to be ignored. + if v.Prerelease() != "" && !includePre { + return false, fmt.Errorf("%s is a prerelease version and the constraint is only looking for release versions", v) + } + + var eq bool + + if !c.dirty { + eq = v.Compare(c.con) <= 0 + if eq { + return true, nil + } + return false, fmt.Errorf("%s is greater than %s", v, c.orig) + } + + if v.Major() > c.con.Major() { + return false, fmt.Errorf("%s is greater than %s", v, c.orig) + } else if v.Major() == c.con.Major() && v.Minor() > c.con.Minor() && !c.minorDirty { + return false, fmt.Errorf("%s is greater than %s", v, c.orig) + } + + return true, nil +} + +// ~*, ~>* --> >= 0.0.0 (any) +// ~2, ~2.x, ~2.x.x, ~>2, ~>2.x ~>2.x.x --> >=2.0.0, <3.0.0 +// ~2.0, ~2.0.x, ~>2.0, ~>2.0.x --> >=2.0.0, <2.1.0 +// ~1.2, ~1.2.x, ~>1.2, ~>1.2.x --> >=1.2.0, <1.3.0 +// ~1.2.3, ~>1.2.3 --> >=1.2.3, <1.3.0 +// ~1.2.0, ~>1.2.0 --> >=1.2.0, <1.3.0 +func constraintTilde(v *Version, c *constraint, includePre bool) (bool, error) { + // The existence of prereleases is checked at the group level and passed in. + // Exit early if the version has a prerelease but those are to be ignored. + if v.Prerelease() != "" && !includePre { + return false, fmt.Errorf("%s is a prerelease version and the constraint is only looking for release versions", v) + } + + if v.LessThan(c.con) { + return false, fmt.Errorf("%s is less than %s", v, c.orig) + } + + // ~0.0.0 is a special case where all constraints are accepted. It's + // equivalent to >= 0.0.0. + if c.con.Major() == 0 && c.con.Minor() == 0 && c.con.Patch() == 0 && + !c.minorDirty && !c.patchDirty { + return true, nil + } + + if v.Major() != c.con.Major() { + return false, fmt.Errorf("%s does not have same major version as %s", v, c.orig) + } + + if v.Minor() != c.con.Minor() && !c.minorDirty { + return false, fmt.Errorf("%s does not have same major and minor version as %s", v, c.orig) + } + + return true, nil +} + +// When there is a .x (dirty) status it automatically opts in to ~. Otherwise +// it's a straight = +func constraintTildeOrEqual(v *Version, c *constraint, includePre bool) (bool, error) { + // The existence of prereleases is checked at the group level and passed in. + // Exit early if the version has a prerelease but those are to be ignored. + if v.Prerelease() != "" && !includePre { + return false, fmt.Errorf("%s is a prerelease version and the constraint is only looking for release versions", v) + } + + if c.dirty { + return constraintTilde(v, c, includePre) + } + + eq := v.Equal(c.con) + if eq { + return true, nil + } + + return false, fmt.Errorf("%s is not equal to %s", v, c.orig) +} + +// ^* --> (any) +// ^1.2.3 --> >=1.2.3 <2.0.0 +// ^1.2 --> >=1.2.0 <2.0.0 +// ^1 --> >=1.0.0 <2.0.0 +// ^0.2.3 --> >=0.2.3 <0.3.0 +// ^0.2 --> >=0.2.0 <0.3.0 +// ^0.0.3 --> >=0.0.3 <0.0.4 +// ^0.0 --> >=0.0.0 <0.1.0 +// ^0 --> >=0.0.0 <1.0.0 +func constraintCaret(v *Version, c *constraint, includePre bool) (bool, error) { + // The existence of prereleases is checked at the group level and passed in. + // Exit early if the version has a prerelease but those are to be ignored. + if v.Prerelease() != "" && !includePre { + return false, fmt.Errorf("%s is a prerelease version and the constraint is only looking for release versions", v) + } + + // This less than handles prereleases + if v.LessThan(c.con) { + return false, fmt.Errorf("%s is less than %s", v, c.orig) + } + + var eq bool + + // ^ when the major > 0 is >=x.y.z < x+1 + if c.con.Major() > 0 || c.minorDirty { + + // ^ has to be within a major range for > 0. Everything less than was + // filtered out with the LessThan call above. This filters out those + // that greater but not within the same major range. + eq = v.Major() == c.con.Major() + if eq { + return true, nil + } + return false, fmt.Errorf("%s does not have same major version as %s", v, c.orig) + } + + // ^ when the major is 0 and minor > 0 is >=0.y.z < 0.y+1 + if c.con.Major() == 0 && v.Major() > 0 { + return false, fmt.Errorf("%s does not have same major version as %s", v, c.orig) + } + // If the con Minor is > 0 it is not dirty + if c.con.Minor() > 0 || c.patchDirty { + eq = v.Minor() == c.con.Minor() + if eq { + return true, nil + } + return false, fmt.Errorf("%s does not have same minor version as %s. Expected minor versions to match when constraint major version is 0", v, c.orig) + } + // ^ when the minor is 0 and minor > 0 is =0.0.z + if c.con.Minor() == 0 && v.Minor() > 0 { + return false, fmt.Errorf("%s does not have same minor version as %s", v, c.orig) + } + + // At this point the major is 0 and the minor is 0 and not dirty. The patch + // is not dirty so we need to check if they are equal. If they are not equal + eq = c.con.Patch() == v.Patch() + if eq { + return true, nil + } + return false, fmt.Errorf("%s does not equal %s. Expect version and constraint to equal when major and minor versions are 0", v, c.orig) +} + +func isX(x string) bool { + switch x { + case "x", "*", "X": + return true + default: + return false + } +} + +func rewriteRange(i string) string { + m := constraintRangeRegex.FindAllStringSubmatch(i, -1) + if m == nil { + return i + } + o := i + for _, v := range m { + t := fmt.Sprintf(">= %s, <= %s ", v[1], v[11]) + o = strings.Replace(o, v[0], t, 1) + } + + return o +} diff --git a/backend/vendor/github.com/Masterminds/semver/v3/doc.go b/backend/vendor/github.com/Masterminds/semver/v3/doc.go new file mode 100644 index 0000000..74f97ca --- /dev/null +++ b/backend/vendor/github.com/Masterminds/semver/v3/doc.go @@ -0,0 +1,184 @@ +/* +Package semver provides the ability to work with Semantic Versions (http://semver.org) in Go. + +Specifically it provides the ability to: + + - Parse semantic versions + - Sort semantic versions + - Check if a semantic version fits within a set of constraints + - Optionally work with a `v` prefix + +# Parsing Semantic Versions + +There are two functions that can parse semantic versions. The `StrictNewVersion` +function only parses valid version 2 semantic versions as outlined in the +specification. The `NewVersion` function attempts to coerce a version into a +semantic version and parse it. For example, if there is a leading v or a version +listed without all 3 parts (e.g. 1.2) it will attempt to coerce it into a valid +semantic version (e.g., 1.2.0). In both cases a `Version` object is returned +that can be sorted, compared, and used in constraints. + +When parsing a version an optional error can be returned if there is an issue +parsing the version. For example, + + v, err := semver.NewVersion("1.2.3-beta.1+b345") + +The version object has methods to get the parts of the version, compare it to +other versions, convert the version back into a string, and get the original +string. For more details please see the documentation +at https://godoc.org/github.com/Masterminds/semver. + +# Sorting Semantic Versions + +A set of versions can be sorted using the `sort` package from the standard library. +For example, + + raw := []string{"1.2.3", "1.0", "1.3", "2", "0.4.2",} + vs := make([]*semver.Version, len(raw)) + for i, r := range raw { + v, err := semver.NewVersion(r) + if err != nil { + t.Errorf("Error parsing version: %s", err) + } + + vs[i] = v + } + + sort.Sort(semver.Collection(vs)) + +# Checking Version Constraints and Comparing Versions + +There are two methods for comparing versions. One uses comparison methods on +`Version` instances and the other is using Constraints. There are some important +differences to notes between these two methods of comparison. + + 1. When two versions are compared using functions such as `Compare`, `LessThan`, + and others it will follow the specification and always include prereleases + within the comparison. It will provide an answer valid with the comparison + spec section at https://semver.org/#spec-item-11 + 2. When constraint checking is used for checks or validation it will follow a + different set of rules that are common for ranges with tools like npm/js + and Rust/Cargo. This includes considering prereleases to be invalid if the + ranges does not include on. If you want to have it include pre-releases a + simple solution is to include `-0` in your range. + 3. Constraint ranges can have some complex rules including the shorthard use of + ~ and ^. For more details on those see the options below. + +There are differences between the two methods or checking versions because the +comparison methods on `Version` follow the specification while comparison ranges +are not part of the specification. Different packages and tools have taken it +upon themselves to come up with range rules. This has resulted in differences. +For example, npm/js and Cargo/Rust follow similar patterns which PHP has a +different pattern for ^. The comparison features in this package follow the +npm/js and Cargo/Rust lead because applications using it have followed similar +patters with their versions. + +Checking a version against version constraints is one of the most featureful +parts of the package. + + c, err := semver.NewConstraint(">= 1.2.3") + if err != nil { + // Handle constraint not being parsable. + } + + v, err := semver.NewVersion("1.3") + if err != nil { + // Handle version not being parsable. + } + // Check if the version meets the constraints. The a variable will be true. + a := c.Check(v) + +# Basic Comparisons + +There are two elements to the comparisons. First, a comparison string is a list +of comma or space separated AND comparisons. These are then separated by || (OR) +comparisons. For example, `">= 1.2 < 3.0.0 || >= 4.2.3"` is looking for a +comparison that's greater than or equal to 1.2 and less than 3.0.0 or is +greater than or equal to 4.2.3. This can also be written as +`">= 1.2, < 3.0.0 || >= 4.2.3"` + +The basic comparisons are: + + - `=`: equal (aliased to no operator) + - `!=`: not equal + - `>`: greater than + - `<`: less than + - `>=`: greater than or equal to + - `<=`: less than or equal to + +# Hyphen Range Comparisons + +There are multiple methods to handle ranges and the first is hyphens ranges. +These look like: + + - `1.2 - 1.4.5` which is equivalent to `>= 1.2, <= 1.4.5` + - `2.3.4 - 4.5` which is equivalent to `>= 2.3.4 <= 4.5` + +# Wildcards In Comparisons + +The `x`, `X`, and `*` characters can be used as a wildcard character. This works +for all comparison operators. When used on the `=` operator it falls +back to the tilde operation. For example, + + - `1.2.x` is equivalent to `>= 1.2.0 < 1.3.0` + - `>= 1.2.x` is equivalent to `>= 1.2.0` + - `<= 2.x` is equivalent to `<= 3` + - `*` is equivalent to `>= 0.0.0` + +Tilde Range Comparisons (Patch) + +The tilde (`~`) comparison operator is for patch level ranges when a minor +version is specified and major level changes when the minor number is missing. +For example, + + - `~1.2.3` is equivalent to `>= 1.2.3 < 1.3.0` + - `~1` is equivalent to `>= 1, < 2` + - `~2.3` is equivalent to `>= 2.3 < 2.4` + - `~1.2.x` is equivalent to `>= 1.2.0 < 1.3.0` + - `~1.x` is equivalent to `>= 1 < 2` + +Caret Range Comparisons (Major) + +The caret (`^`) comparison operator is for major level changes once a stable +(1.0.0) release has occurred. Prior to a 1.0.0 release the minor versions acts +as the API stability level. This is useful when comparisons of API versions as a +major change is API breaking. For example, + + - `^1.2.3` is equivalent to `>= 1.2.3, < 2.0.0` + - `^1.2.x` is equivalent to `>= 1.2.0, < 2.0.0` + - `^2.3` is equivalent to `>= 2.3, < 3` + - `^2.x` is equivalent to `>= 2.0.0, < 3` + - `^0.2.3` is equivalent to `>=0.2.3 <0.3.0` + - `^0.2` is equivalent to `>=0.2.0 <0.3.0` + - `^0.0.3` is equivalent to `>=0.0.3 <0.0.4` + - `^0.0` is equivalent to `>=0.0.0 <0.1.0` + - `^0` is equivalent to `>=0.0.0 <1.0.0` + +# Validation + +In addition to testing a version against a constraint, a version can be validated +against a constraint. When validation fails a slice of errors containing why a +version didn't meet the constraint is returned. For example, + + c, err := semver.NewConstraint("<= 1.2.3, >= 1.4") + if err != nil { + // Handle constraint not being parseable. + } + + v, _ := semver.NewVersion("1.3") + if err != nil { + // Handle version not being parseable. + } + + // Validate a version against a constraint. + a, msgs := c.Validate(v) + // a is false + for _, m := range msgs { + fmt.Println(m) + + // Loops over the errors which would read + // "1.3 is greater than 1.2.3" + // "1.3 is less than 1.4" + } +*/ +package semver diff --git a/backend/vendor/github.com/Masterminds/semver/v3/version.go b/backend/vendor/github.com/Masterminds/semver/v3/version.go new file mode 100644 index 0000000..7a3ba73 --- /dev/null +++ b/backend/vendor/github.com/Masterminds/semver/v3/version.go @@ -0,0 +1,788 @@ +package semver + +import ( + "bytes" + "database/sql/driver" + "encoding/json" + "errors" + "fmt" + "regexp" + "strconv" + "strings" +) + +// The compiled version of the regex created at init() is cached here so it +// only needs to be created once. +var versionRegex *regexp.Regexp +var looseVersionRegex *regexp.Regexp + +// CoerceNewVersion sets if leading 0's are allowd in the version part. Leading 0's are +// not allowed in a valid semantic version. When set to true, NewVersion will coerce +// leading 0's into a valid version. +var CoerceNewVersion = true + +// DetailedNewVersionErrors specifies if detailed errors are returned from the NewVersion +// function. This is used when CoerceNewVersion is set to false. If set to false +// ErrInvalidSemVer is returned for an invalid version. This does not apply to +// StrictNewVersion. Setting this function to false returns errors more quickly. +var DetailedNewVersionErrors = true + +var ( + // ErrInvalidSemVer is returned a version is found to be invalid when + // being parsed. + ErrInvalidSemVer = errors.New("invalid semantic version") + + // ErrEmptyString is returned when an empty string is passed in for parsing. + ErrEmptyString = errors.New("version string empty") + + // ErrInvalidCharacters is returned when invalid characters are found as + // part of a version + ErrInvalidCharacters = errors.New("invalid characters in version") + + // ErrSegmentStartsZero is returned when a version segment starts with 0. + // This is invalid in SemVer. + ErrSegmentStartsZero = errors.New("version segment starts with 0") + + // ErrInvalidMetadata is returned when the metadata is an invalid format + ErrInvalidMetadata = errors.New("invalid metadata string") + + // ErrInvalidPrerelease is returned when the pre-release is an invalid format + ErrInvalidPrerelease = errors.New("invalid prerelease string") +) + +// semVerRegex is the regular expression used to parse a semantic version. +// This is not the official regex from the semver spec. It has been modified to allow for loose handling +// where versions like 2.1 are detected. +const semVerRegex string = `v?(0|[1-9]\d*)(?:\.(0|[1-9]\d*))?(?:\.(0|[1-9]\d*))?` + + `(?:-((?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?` + + `(?:\+([0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?` + +// looseSemVerRegex is a regular expression that lets invalid semver expressions through +// with enough detail that certain errors can be checked for. +const looseSemVerRegex string = `v?([0-9]+)(\.[0-9]+)?(\.[0-9]+)?` + + `(-([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?` + + `(\+([0-9A-Za-z\-]+(\.[0-9A-Za-z\-]+)*))?` + +// Version represents a single semantic version. +type Version struct { + major, minor, patch uint64 + pre string + metadata string + original string +} + +func init() { + versionRegex = regexp.MustCompile("^" + semVerRegex + "$") + looseVersionRegex = regexp.MustCompile("^" + looseSemVerRegex + "$") +} + +const ( + num string = "0123456789" + allowed string = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-" + num +) + +// StrictNewVersion parses a given version and returns an instance of Version or +// an error if unable to parse the version. Only parses valid semantic versions. +// Performs checking that can find errors within the version. +// If you want to coerce a version such as 1 or 1.2 and parse it as the 1.x +// releases of semver did, use the NewVersion() function. +func StrictNewVersion(v string) (*Version, error) { + // Parsing here does not use RegEx in order to increase performance and reduce + // allocations. + + if len(v) == 0 { + return nil, ErrEmptyString + } + + // Split the parts into [0]major, [1]minor, and [2]patch,prerelease,build + parts := strings.SplitN(v, ".", 3) + if len(parts) != 3 { + return nil, ErrInvalidSemVer + } + + sv := &Version{ + original: v, + } + + // Extract build metadata + if strings.Contains(parts[2], "+") { + extra := strings.SplitN(parts[2], "+", 2) + sv.metadata = extra[1] + parts[2] = extra[0] + if err := validateMetadata(sv.metadata); err != nil { + return nil, err + } + } + + // Extract build prerelease + if strings.Contains(parts[2], "-") { + extra := strings.SplitN(parts[2], "-", 2) + sv.pre = extra[1] + parts[2] = extra[0] + if err := validatePrerelease(sv.pre); err != nil { + return nil, err + } + } + + // Validate the number segments are valid. This includes only having positive + // numbers and no leading 0's. + for _, p := range parts { + if !containsOnly(p, num) { + return nil, ErrInvalidCharacters + } + + if len(p) > 1 && p[0] == '0' { + return nil, ErrSegmentStartsZero + } + } + + // Extract major, minor, and patch + var err error + sv.major, err = strconv.ParseUint(parts[0], 10, 64) + if err != nil { + return nil, err + } + + sv.minor, err = strconv.ParseUint(parts[1], 10, 64) + if err != nil { + return nil, err + } + + sv.patch, err = strconv.ParseUint(parts[2], 10, 64) + if err != nil { + return nil, err + } + + return sv, nil +} + +// NewVersion parses a given version and returns an instance of Version or +// an error if unable to parse the version. If the version is SemVer-ish it +// attempts to convert it to SemVer. If you want to validate it was a strict +// semantic version at parse time see StrictNewVersion(). +func NewVersion(v string) (*Version, error) { + if CoerceNewVersion { + return coerceNewVersion(v) + } + m := versionRegex.FindStringSubmatch(v) + if m == nil { + + // Disabling detailed errors is first so that it is in the fast path. + if !DetailedNewVersionErrors { + return nil, ErrInvalidSemVer + } + + // Check for specific errors with the semver string and return a more detailed + // error. + m = looseVersionRegex.FindStringSubmatch(v) + if m == nil { + return nil, ErrInvalidSemVer + } + err := validateVersion(m) + if err != nil { + return nil, err + } + return nil, ErrInvalidSemVer + } + + sv := &Version{ + metadata: m[5], + pre: m[4], + original: v, + } + + var err error + sv.major, err = strconv.ParseUint(m[1], 10, 64) + if err != nil { + return nil, fmt.Errorf("error parsing version segment: %w", err) + } + + if m[2] != "" { + sv.minor, err = strconv.ParseUint(m[2], 10, 64) + if err != nil { + return nil, fmt.Errorf("error parsing version segment: %w", err) + } + } else { + sv.minor = 0 + } + + if m[3] != "" { + sv.patch, err = strconv.ParseUint(m[3], 10, 64) + if err != nil { + return nil, fmt.Errorf("error parsing version segment: %w", err) + } + } else { + sv.patch = 0 + } + + // Perform some basic due diligence on the extra parts to ensure they are + // valid. + + if sv.pre != "" { + if err = validatePrerelease(sv.pre); err != nil { + return nil, err + } + } + + if sv.metadata != "" { + if err = validateMetadata(sv.metadata); err != nil { + return nil, err + } + } + + return sv, nil +} + +func coerceNewVersion(v string) (*Version, error) { + m := looseVersionRegex.FindStringSubmatch(v) + if m == nil { + return nil, ErrInvalidSemVer + } + + sv := &Version{ + metadata: m[8], + pre: m[5], + original: v, + } + + var err error + sv.major, err = strconv.ParseUint(m[1], 10, 64) + if err != nil { + return nil, fmt.Errorf("error parsing version segment: %w", err) + } + + if m[2] != "" { + sv.minor, err = strconv.ParseUint(strings.TrimPrefix(m[2], "."), 10, 64) + if err != nil { + return nil, fmt.Errorf("error parsing version segment: %w", err) + } + } else { + sv.minor = 0 + } + + if m[3] != "" { + sv.patch, err = strconv.ParseUint(strings.TrimPrefix(m[3], "."), 10, 64) + if err != nil { + return nil, fmt.Errorf("error parsing version segment: %w", err) + } + } else { + sv.patch = 0 + } + + // Perform some basic due diligence on the extra parts to ensure they are + // valid. + + if sv.pre != "" { + if err = validatePrerelease(sv.pre); err != nil { + return nil, err + } + } + + if sv.metadata != "" { + if err = validateMetadata(sv.metadata); err != nil { + return nil, err + } + } + + return sv, nil +} + +// New creates a new instance of Version with each of the parts passed in as +// arguments instead of parsing a version string. +func New(major, minor, patch uint64, pre, metadata string) *Version { + v := Version{ + major: major, + minor: minor, + patch: patch, + pre: pre, + metadata: metadata, + original: "", + } + + v.original = v.String() + + return &v +} + +// MustParse parses a given version and panics on error. +func MustParse(v string) *Version { + sv, err := NewVersion(v) + if err != nil { + panic(err) + } + return sv +} + +// String converts a Version object to a string. +// Note, if the original version contained a leading v this version will not. +// See the Original() method to retrieve the original value. Semantic Versions +// don't contain a leading v per the spec. Instead it's optional on +// implementation. +func (v Version) String() string { + var buf bytes.Buffer + + fmt.Fprintf(&buf, "%d.%d.%d", v.major, v.minor, v.patch) + if v.pre != "" { + fmt.Fprintf(&buf, "-%s", v.pre) + } + if v.metadata != "" { + fmt.Fprintf(&buf, "+%s", v.metadata) + } + + return buf.String() +} + +// Original returns the original value passed in to be parsed. +func (v *Version) Original() string { + return v.original +} + +// Major returns the major version. +func (v Version) Major() uint64 { + return v.major +} + +// Minor returns the minor version. +func (v Version) Minor() uint64 { + return v.minor +} + +// Patch returns the patch version. +func (v Version) Patch() uint64 { + return v.patch +} + +// Prerelease returns the pre-release version. +func (v Version) Prerelease() string { + return v.pre +} + +// Metadata returns the metadata on the version. +func (v Version) Metadata() string { + return v.metadata +} + +// originalVPrefix returns the original 'v' prefix if any. +func (v Version) originalVPrefix() string { + // Note, only lowercase v is supported as a prefix by the parser. + if v.original != "" && v.original[:1] == "v" { + return v.original[:1] + } + return "" +} + +// IncPatch produces the next patch version. +// If the current version does not have prerelease/metadata information, +// it unsets metadata and prerelease values, increments patch number. +// If the current version has any of prerelease or metadata information, +// it unsets both values and keeps current patch value +func (v Version) IncPatch() Version { + vNext := v + // according to http://semver.org/#spec-item-9 + // Pre-release versions have a lower precedence than the associated normal version. + // according to http://semver.org/#spec-item-10 + // Build metadata SHOULD be ignored when determining version precedence. + if v.pre != "" { + vNext.metadata = "" + vNext.pre = "" + } else { + vNext.metadata = "" + vNext.pre = "" + vNext.patch = v.patch + 1 + } + vNext.original = v.originalVPrefix() + "" + vNext.String() + return vNext +} + +// IncMinor produces the next minor version. +// Sets patch to 0. +// Increments minor number. +// Unsets metadata. +// Unsets prerelease status. +func (v Version) IncMinor() Version { + vNext := v + vNext.metadata = "" + vNext.pre = "" + vNext.patch = 0 + vNext.minor = v.minor + 1 + vNext.original = v.originalVPrefix() + "" + vNext.String() + return vNext +} + +// IncMajor produces the next major version. +// Sets patch to 0. +// Sets minor to 0. +// Increments major number. +// Unsets metadata. +// Unsets prerelease status. +func (v Version) IncMajor() Version { + vNext := v + vNext.metadata = "" + vNext.pre = "" + vNext.patch = 0 + vNext.minor = 0 + vNext.major = v.major + 1 + vNext.original = v.originalVPrefix() + "" + vNext.String() + return vNext +} + +// SetPrerelease defines the prerelease value. +// Value must not include the required 'hyphen' prefix. +func (v Version) SetPrerelease(prerelease string) (Version, error) { + vNext := v + if len(prerelease) > 0 { + if err := validatePrerelease(prerelease); err != nil { + return vNext, err + } + } + vNext.pre = prerelease + vNext.original = v.originalVPrefix() + "" + vNext.String() + return vNext, nil +} + +// SetMetadata defines metadata value. +// Value must not include the required 'plus' prefix. +func (v Version) SetMetadata(metadata string) (Version, error) { + vNext := v + if len(metadata) > 0 { + if err := validateMetadata(metadata); err != nil { + return vNext, err + } + } + vNext.metadata = metadata + vNext.original = v.originalVPrefix() + "" + vNext.String() + return vNext, nil +} + +// LessThan tests if one version is less than another one. +func (v *Version) LessThan(o *Version) bool { + return v.Compare(o) < 0 +} + +// LessThanEqual tests if one version is less or equal than another one. +func (v *Version) LessThanEqual(o *Version) bool { + return v.Compare(o) <= 0 +} + +// GreaterThan tests if one version is greater than another one. +func (v *Version) GreaterThan(o *Version) bool { + return v.Compare(o) > 0 +} + +// GreaterThanEqual tests if one version is greater or equal than another one. +func (v *Version) GreaterThanEqual(o *Version) bool { + return v.Compare(o) >= 0 +} + +// Equal tests if two versions are equal to each other. +// Note, versions can be equal with different metadata since metadata +// is not considered part of the comparable version. +func (v *Version) Equal(o *Version) bool { + if v == o { + return true + } + if v == nil || o == nil { + return false + } + return v.Compare(o) == 0 +} + +// Compare compares this version to another one. It returns -1, 0, or 1 if +// the version smaller, equal, or larger than the other version. +// +// Versions are compared by X.Y.Z. Build metadata is ignored. Prerelease is +// lower than the version without a prerelease. Compare always takes into account +// prereleases. If you want to work with ranges using typical range syntaxes that +// skip prereleases if the range is not looking for them use constraints. +func (v *Version) Compare(o *Version) int { + // Compare the major, minor, and patch version for differences. If a + // difference is found return the comparison. + if d := compareSegment(v.Major(), o.Major()); d != 0 { + return d + } + if d := compareSegment(v.Minor(), o.Minor()); d != 0 { + return d + } + if d := compareSegment(v.Patch(), o.Patch()); d != 0 { + return d + } + + // At this point the major, minor, and patch versions are the same. + ps := v.pre + po := o.Prerelease() + + if ps == "" && po == "" { + return 0 + } + if ps == "" { + return 1 + } + if po == "" { + return -1 + } + + return comparePrerelease(ps, po) +} + +// UnmarshalJSON implements JSON.Unmarshaler interface. +func (v *Version) UnmarshalJSON(b []byte) error { + var s string + if err := json.Unmarshal(b, &s); err != nil { + return err + } + temp, err := NewVersion(s) + if err != nil { + return err + } + v.major = temp.major + v.minor = temp.minor + v.patch = temp.patch + v.pre = temp.pre + v.metadata = temp.metadata + v.original = temp.original + return nil +} + +// MarshalJSON implements JSON.Marshaler interface. +func (v Version) MarshalJSON() ([]byte, error) { + return json.Marshal(v.String()) +} + +// UnmarshalText implements the encoding.TextUnmarshaler interface. +func (v *Version) UnmarshalText(text []byte) error { + temp, err := NewVersion(string(text)) + if err != nil { + return err + } + + *v = *temp + + return nil +} + +// MarshalText implements the encoding.TextMarshaler interface. +func (v Version) MarshalText() ([]byte, error) { + return []byte(v.String()), nil +} + +// Scan implements the SQL.Scanner interface. +func (v *Version) Scan(value interface{}) error { + var s string + s, _ = value.(string) + temp, err := NewVersion(s) + if err != nil { + return err + } + v.major = temp.major + v.minor = temp.minor + v.patch = temp.patch + v.pre = temp.pre + v.metadata = temp.metadata + v.original = temp.original + return nil +} + +// Value implements the Driver.Valuer interface. +func (v Version) Value() (driver.Value, error) { + return v.String(), nil +} + +func compareSegment(v, o uint64) int { + if v < o { + return -1 + } + if v > o { + return 1 + } + + return 0 +} + +func comparePrerelease(v, o string) int { + // split the prelease versions by their part. The separator, per the spec, + // is a . + sparts := strings.Split(v, ".") + oparts := strings.Split(o, ".") + + // Find the longer length of the parts to know how many loop iterations to + // go through. + slen := len(sparts) + olen := len(oparts) + + l := slen + if olen > slen { + l = olen + } + + // Iterate over each part of the prereleases to compare the differences. + for i := 0; i < l; i++ { + // Since the lentgh of the parts can be different we need to create + // a placeholder. This is to avoid out of bounds issues. + stemp := "" + if i < slen { + stemp = sparts[i] + } + + otemp := "" + if i < olen { + otemp = oparts[i] + } + + d := comparePrePart(stemp, otemp) + if d != 0 { + return d + } + } + + // Reaching here means two versions are of equal value but have different + // metadata (the part following a +). They are not identical in string form + // but the version comparison finds them to be equal. + return 0 +} + +func comparePrePart(s, o string) int { + // Fastpath if they are equal + if s == o { + return 0 + } + + // When s or o are empty we can use the other in an attempt to determine + // the response. + if s == "" { + if o != "" { + return -1 + } + return 1 + } + + if o == "" { + if s != "" { + return 1 + } + return -1 + } + + // When comparing strings "99" is greater than "103". To handle + // cases like this we need to detect numbers and compare them. According + // to the semver spec, numbers are always positive. If there is a - at the + // start like -99 this is to be evaluated as an alphanum. numbers always + // have precedence over alphanum. Parsing as Uints because negative numbers + // are ignored. + + oi, n1 := strconv.ParseUint(o, 10, 64) + si, n2 := strconv.ParseUint(s, 10, 64) + + // The case where both are strings compare the strings + if n1 != nil && n2 != nil { + if s > o { + return 1 + } + return -1 + } else if n1 != nil { + // o is a string and s is a number + return -1 + } else if n2 != nil { + // s is a string and o is a number + return 1 + } + // Both are numbers + if si > oi { + return 1 + } + return -1 +} + +// Like strings.ContainsAny but does an only instead of any. +func containsOnly(s string, comp string) bool { + return strings.IndexFunc(s, func(r rune) bool { + return !strings.ContainsRune(comp, r) + }) == -1 +} + +// From the spec, "Identifiers MUST comprise only +// ASCII alphanumerics and hyphen [0-9A-Za-z-]. Identifiers MUST NOT be empty. +// Numeric identifiers MUST NOT include leading zeroes.". These segments can +// be dot separated. +func validatePrerelease(p string) error { + eparts := strings.Split(p, ".") + for _, p := range eparts { + if p == "" { + return ErrInvalidPrerelease + } else if containsOnly(p, num) { + if len(p) > 1 && p[0] == '0' { + return ErrSegmentStartsZero + } + } else if !containsOnly(p, allowed) { + return ErrInvalidPrerelease + } + } + + return nil +} + +// From the spec, "Build metadata MAY be denoted by +// appending a plus sign and a series of dot separated identifiers immediately +// following the patch or pre-release version. Identifiers MUST comprise only +// ASCII alphanumerics and hyphen [0-9A-Za-z-]. Identifiers MUST NOT be empty." +func validateMetadata(m string) error { + eparts := strings.Split(m, ".") + for _, p := range eparts { + if p == "" { + return ErrInvalidMetadata + } else if !containsOnly(p, allowed) { + return ErrInvalidMetadata + } + } + return nil +} + +// validateVersion checks for common validation issues but may not catch all errors +func validateVersion(m []string) error { + var err error + var v string + if m[1] != "" { + if len(m[1]) > 1 && m[1][0] == '0' { + return ErrSegmentStartsZero + } + _, err = strconv.ParseUint(m[1], 10, 64) + if err != nil { + return fmt.Errorf("error parsing version segment: %w", err) + } + } + + if m[2] != "" { + v = strings.TrimPrefix(m[2], ".") + if len(v) > 1 && v[0] == '0' { + return ErrSegmentStartsZero + } + _, err = strconv.ParseUint(v, 10, 64) + if err != nil { + return fmt.Errorf("error parsing version segment: %w", err) + } + } + + if m[3] != "" { + v = strings.TrimPrefix(m[3], ".") + if len(v) > 1 && v[0] == '0' { + return ErrSegmentStartsZero + } + _, err = strconv.ParseUint(v, 10, 64) + if err != nil { + return fmt.Errorf("error parsing version segment: %w", err) + } + } + + if m[5] != "" { + if err = validatePrerelease(m[5]); err != nil { + return err + } + } + + if m[8] != "" { + if err = validateMetadata(m[8]); err != nil { + return err + } + } + + return nil +} diff --git a/backend/vendor/github.com/andybalholm/brotli/.gitignore b/backend/vendor/github.com/andybalholm/brotli/.gitignore new file mode 100644 index 0000000..7fd1752 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/.gitignore @@ -0,0 +1,2 @@ +cpu.out +brotli.test diff --git a/backend/vendor/github.com/andybalholm/brotli/LICENSE b/backend/vendor/github.com/andybalholm/brotli/LICENSE new file mode 100644 index 0000000..33b7cdd --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/LICENSE @@ -0,0 +1,19 @@ +Copyright (c) 2009, 2010, 2013-2016 by the Brotli Authors. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. diff --git a/backend/vendor/github.com/andybalholm/brotli/README.md b/backend/vendor/github.com/andybalholm/brotli/README.md new file mode 100644 index 0000000..0062521 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/README.md @@ -0,0 +1,14 @@ +This package is a brotli compressor and decompressor implemented in Go. +It was translated from the reference implementation (https://github.com/google/brotli) +with the `c2go` tool at https://github.com/andybalholm/c2go. + +I have been working on new compression algorithms (not translated from C) +in the matchfinder package. +You can use them with the NewWriterV2 function. +Currently they give better results than the old implementation +(at least for compressing my test file, Newton’s *Opticks*) +on levels 2 to 6. + +I am using it in production with https://github.com/andybalholm/redwood. + +API documentation is found at https://pkg.go.dev/github.com/andybalholm/brotli?tab=doc. diff --git a/backend/vendor/github.com/andybalholm/brotli/backward_references.go b/backend/vendor/github.com/andybalholm/brotli/backward_references.go new file mode 100644 index 0000000..008c054 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/backward_references.go @@ -0,0 +1,185 @@ +package brotli + +import ( + "sync" +) + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Function to find backward reference copies. */ + +func computeDistanceCode(distance uint, max_distance uint, dist_cache []int) uint { + if distance <= max_distance { + var distance_plus_3 uint = distance + 3 + var offset0 uint = distance_plus_3 - uint(dist_cache[0]) + var offset1 uint = distance_plus_3 - uint(dist_cache[1]) + if distance == uint(dist_cache[0]) { + return 0 + } else if distance == uint(dist_cache[1]) { + return 1 + } else if offset0 < 7 { + return (0x9750468 >> (4 * offset0)) & 0xF + } else if offset1 < 7 { + return (0xFDB1ACE >> (4 * offset1)) & 0xF + } else if distance == uint(dist_cache[2]) { + return 2 + } else if distance == uint(dist_cache[3]) { + return 3 + } + } + + return distance + numDistanceShortCodes - 1 +} + +var hasherSearchResultPool sync.Pool + +func createBackwardReferences(num_bytes uint, position uint, ringbuffer []byte, ringbuffer_mask uint, params *encoderParams, hasher hasherHandle, dist_cache []int, last_insert_len *uint, commands *[]command, num_literals *uint) { + var max_backward_limit uint = maxBackwardLimit(params.lgwin) + var insert_length uint = *last_insert_len + var pos_end uint = position + num_bytes + var store_end uint + if num_bytes >= hasher.StoreLookahead() { + store_end = position + num_bytes - hasher.StoreLookahead() + 1 + } else { + store_end = position + } + var random_heuristics_window_size uint = literalSpreeLengthForSparseSearch(params) + var apply_random_heuristics uint = position + random_heuristics_window_size + var gap uint = 0 + /* Set maximum distance, see section 9.1. of the spec. */ + + const kMinScore uint = scoreBase + 100 + + /* For speed up heuristics for random data. */ + + /* Minimum score to accept a backward reference. */ + hasher.PrepareDistanceCache(dist_cache) + sr2, _ := hasherSearchResultPool.Get().(*hasherSearchResult) + if sr2 == nil { + sr2 = &hasherSearchResult{} + } + sr, _ := hasherSearchResultPool.Get().(*hasherSearchResult) + if sr == nil { + sr = &hasherSearchResult{} + } + + for position+hasher.HashTypeLength() < pos_end { + var max_length uint = pos_end - position + var max_distance uint = brotli_min_size_t(position, max_backward_limit) + sr.len = 0 + sr.len_code_delta = 0 + sr.distance = 0 + sr.score = kMinScore + hasher.FindLongestMatch(¶ms.dictionary, ringbuffer, ringbuffer_mask, dist_cache, position, max_length, max_distance, gap, params.dist.max_distance, sr) + if sr.score > kMinScore { + /* Found a match. Let's look for something even better ahead. */ + var delayed_backward_references_in_row int = 0 + max_length-- + for ; ; max_length-- { + var cost_diff_lazy uint = 175 + if params.quality < minQualityForExtensiveReferenceSearch { + sr2.len = brotli_min_size_t(sr.len-1, max_length) + } else { + sr2.len = 0 + } + sr2.len_code_delta = 0 + sr2.distance = 0 + sr2.score = kMinScore + max_distance = brotli_min_size_t(position+1, max_backward_limit) + hasher.FindLongestMatch(¶ms.dictionary, ringbuffer, ringbuffer_mask, dist_cache, position+1, max_length, max_distance, gap, params.dist.max_distance, sr2) + if sr2.score >= sr.score+cost_diff_lazy { + /* Ok, let's just write one byte for now and start a match from the + next byte. */ + position++ + + insert_length++ + *sr = *sr2 + delayed_backward_references_in_row++ + if delayed_backward_references_in_row < 4 && position+hasher.HashTypeLength() < pos_end { + continue + } + } + + break + } + + apply_random_heuristics = position + 2*sr.len + random_heuristics_window_size + max_distance = brotli_min_size_t(position, max_backward_limit) + { + /* The first 16 codes are special short-codes, + and the minimum offset is 1. */ + var distance_code uint = computeDistanceCode(sr.distance, max_distance+gap, dist_cache) + if (sr.distance <= (max_distance + gap)) && distance_code > 0 { + dist_cache[3] = dist_cache[2] + dist_cache[2] = dist_cache[1] + dist_cache[1] = dist_cache[0] + dist_cache[0] = int(sr.distance) + hasher.PrepareDistanceCache(dist_cache) + } + + *commands = append(*commands, makeCommand(¶ms.dist, insert_length, sr.len, sr.len_code_delta, distance_code)) + } + + *num_literals += insert_length + insert_length = 0 + /* Put the hash keys into the table, if there are enough bytes left. + Depending on the hasher implementation, it can push all positions + in the given range or only a subset of them. + Avoid hash poisoning with RLE data. */ + { + var range_start uint = position + 2 + var range_end uint = brotli_min_size_t(position+sr.len, store_end) + if sr.distance < sr.len>>2 { + range_start = brotli_min_size_t(range_end, brotli_max_size_t(range_start, position+sr.len-(sr.distance<<2))) + } + + hasher.StoreRange(ringbuffer, ringbuffer_mask, range_start, range_end) + } + + position += sr.len + } else { + insert_length++ + position++ + + /* If we have not seen matches for a long time, we can skip some + match lookups. Unsuccessful match lookups are very very expensive + and this kind of a heuristic speeds up compression quite + a lot. */ + if position > apply_random_heuristics { + /* Going through uncompressible data, jump. */ + if position > apply_random_heuristics+4*random_heuristics_window_size { + var kMargin uint = brotli_max_size_t(hasher.StoreLookahead()-1, 4) + /* It is quite a long time since we saw a copy, so we assume + that this data is not compressible, and store hashes less + often. Hashes of non compressible data are less likely to + turn out to be useful in the future, too, so we store less of + them to not to flood out the hash table of good compressible + data. */ + + var pos_jump uint = brotli_min_size_t(position+16, pos_end-kMargin) + for ; position < pos_jump; position += 4 { + hasher.Store(ringbuffer, ringbuffer_mask, position) + insert_length += 4 + } + } else { + var kMargin uint = brotli_max_size_t(hasher.StoreLookahead()-1, 2) + var pos_jump uint = brotli_min_size_t(position+8, pos_end-kMargin) + for ; position < pos_jump; position += 2 { + hasher.Store(ringbuffer, ringbuffer_mask, position) + insert_length += 2 + } + } + } + } + } + + insert_length += pos_end - position + *last_insert_len = insert_length + + hasherSearchResultPool.Put(sr) + hasherSearchResultPool.Put(sr2) +} diff --git a/backend/vendor/github.com/andybalholm/brotli/backward_references_hq.go b/backend/vendor/github.com/andybalholm/brotli/backward_references_hq.go new file mode 100644 index 0000000..21629c1 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/backward_references_hq.go @@ -0,0 +1,796 @@ +package brotli + +import "math" + +type zopfliNode struct { + length uint32 + distance uint32 + dcode_insert_length uint32 + u struct { + cost float32 + next uint32 + shortcut uint32 + } +} + +const maxEffectiveDistanceAlphabetSize = 544 + +const kInfinity float32 = 1.7e38 /* ~= 2 ^ 127 */ + +var kDistanceCacheIndex = []uint32{0, 1, 2, 3, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1} + +var kDistanceCacheOffset = []int{0, 0, 0, 0, -1, 1, -2, 2, -3, 3, -1, 1, -2, 2, -3, 3} + +func initZopfliNodes(array []zopfliNode, length uint) { + var stub zopfliNode + var i uint + stub.length = 1 + stub.distance = 0 + stub.dcode_insert_length = 0 + stub.u.cost = kInfinity + for i = 0; i < length; i++ { + array[i] = stub + } +} + +func zopfliNodeCopyLength(self *zopfliNode) uint32 { + return self.length & 0x1FFFFFF +} + +func zopfliNodeLengthCode(self *zopfliNode) uint32 { + var modifier uint32 = self.length >> 25 + return zopfliNodeCopyLength(self) + 9 - modifier +} + +func zopfliNodeCopyDistance(self *zopfliNode) uint32 { + return self.distance +} + +func zopfliNodeDistanceCode(self *zopfliNode) uint32 { + var short_code uint32 = self.dcode_insert_length >> 27 + if short_code == 0 { + return zopfliNodeCopyDistance(self) + numDistanceShortCodes - 1 + } else { + return short_code - 1 + } +} + +func zopfliNodeCommandLength(self *zopfliNode) uint32 { + return zopfliNodeCopyLength(self) + (self.dcode_insert_length & 0x7FFFFFF) +} + +/* Histogram based cost model for zopflification. */ +type zopfliCostModel struct { + cost_cmd_ [numCommandSymbols]float32 + cost_dist_ []float32 + distance_histogram_size uint32 + literal_costs_ []float32 + min_cost_cmd_ float32 + num_bytes_ uint +} + +func initZopfliCostModel(self *zopfliCostModel, dist *distanceParams, num_bytes uint) { + var distance_histogram_size uint32 = dist.alphabet_size + if distance_histogram_size > maxEffectiveDistanceAlphabetSize { + distance_histogram_size = maxEffectiveDistanceAlphabetSize + } + + self.num_bytes_ = num_bytes + self.literal_costs_ = make([]float32, (num_bytes + 2)) + self.cost_dist_ = make([]float32, (dist.alphabet_size)) + self.distance_histogram_size = distance_histogram_size +} + +func cleanupZopfliCostModel(self *zopfliCostModel) { + self.literal_costs_ = nil + self.cost_dist_ = nil +} + +func setCost(histogram []uint32, histogram_size uint, literal_histogram bool, cost []float32) { + var sum uint = 0 + var missing_symbol_sum uint + var log2sum float32 + var missing_symbol_cost float32 + var i uint + for i = 0; i < histogram_size; i++ { + sum += uint(histogram[i]) + } + + log2sum = float32(fastLog2(sum)) + missing_symbol_sum = sum + if !literal_histogram { + for i = 0; i < histogram_size; i++ { + if histogram[i] == 0 { + missing_symbol_sum++ + } + } + } + + missing_symbol_cost = float32(fastLog2(missing_symbol_sum)) + 2 + for i = 0; i < histogram_size; i++ { + if histogram[i] == 0 { + cost[i] = missing_symbol_cost + continue + } + + /* Shannon bits for this symbol. */ + cost[i] = log2sum - float32(fastLog2(uint(histogram[i]))) + + /* Cannot be coded with less than 1 bit */ + if cost[i] < 1 { + cost[i] = 1 + } + } +} + +func zopfliCostModelSetFromCommands(self *zopfliCostModel, position uint, ringbuffer []byte, ringbuffer_mask uint, commands []command, last_insert_len uint) { + var histogram_literal [numLiteralSymbols]uint32 + var histogram_cmd [numCommandSymbols]uint32 + var histogram_dist [maxEffectiveDistanceAlphabetSize]uint32 + var cost_literal [numLiteralSymbols]float32 + var pos uint = position - last_insert_len + var min_cost_cmd float32 = kInfinity + var cost_cmd []float32 = self.cost_cmd_[:] + var literal_costs []float32 + + histogram_literal = [numLiteralSymbols]uint32{} + histogram_cmd = [numCommandSymbols]uint32{} + histogram_dist = [maxEffectiveDistanceAlphabetSize]uint32{} + + for i := range commands { + var inslength uint = uint(commands[i].insert_len_) + var copylength uint = uint(commandCopyLen(&commands[i])) + var distcode uint = uint(commands[i].dist_prefix_) & 0x3FF + var cmdcode uint = uint(commands[i].cmd_prefix_) + var j uint + + histogram_cmd[cmdcode]++ + if cmdcode >= 128 { + histogram_dist[distcode]++ + } + + for j = 0; j < inslength; j++ { + histogram_literal[ringbuffer[(pos+j)&ringbuffer_mask]]++ + } + + pos += inslength + copylength + } + + setCost(histogram_literal[:], numLiteralSymbols, true, cost_literal[:]) + setCost(histogram_cmd[:], numCommandSymbols, false, cost_cmd) + setCost(histogram_dist[:], uint(self.distance_histogram_size), false, self.cost_dist_) + + for i := 0; i < numCommandSymbols; i++ { + min_cost_cmd = brotli_min_float(min_cost_cmd, cost_cmd[i]) + } + + self.min_cost_cmd_ = min_cost_cmd + { + literal_costs = self.literal_costs_ + var literal_carry float32 = 0.0 + num_bytes := int(self.num_bytes_) + literal_costs[0] = 0.0 + for i := 0; i < num_bytes; i++ { + literal_carry += cost_literal[ringbuffer[(position+uint(i))&ringbuffer_mask]] + literal_costs[i+1] = literal_costs[i] + literal_carry + literal_carry -= literal_costs[i+1] - literal_costs[i] + } + } +} + +func zopfliCostModelSetFromLiteralCosts(self *zopfliCostModel, position uint, ringbuffer []byte, ringbuffer_mask uint) { + var literal_costs []float32 = self.literal_costs_ + var literal_carry float32 = 0.0 + var cost_dist []float32 = self.cost_dist_ + var cost_cmd []float32 = self.cost_cmd_[:] + var num_bytes uint = self.num_bytes_ + var i uint + estimateBitCostsForLiterals(position, num_bytes, ringbuffer_mask, ringbuffer, literal_costs[1:]) + literal_costs[0] = 0.0 + for i = 0; i < num_bytes; i++ { + literal_carry += literal_costs[i+1] + literal_costs[i+1] = literal_costs[i] + literal_carry + literal_carry -= literal_costs[i+1] - literal_costs[i] + } + + for i = 0; i < numCommandSymbols; i++ { + cost_cmd[i] = float32(fastLog2(uint(11 + uint32(i)))) + } + + for i = 0; uint32(i) < self.distance_histogram_size; i++ { + cost_dist[i] = float32(fastLog2(uint(20 + uint32(i)))) + } + + self.min_cost_cmd_ = float32(fastLog2(11)) +} + +func zopfliCostModelGetCommandCost(self *zopfliCostModel, cmdcode uint16) float32 { + return self.cost_cmd_[cmdcode] +} + +func zopfliCostModelGetDistanceCost(self *zopfliCostModel, distcode uint) float32 { + return self.cost_dist_[distcode] +} + +func zopfliCostModelGetLiteralCosts(self *zopfliCostModel, from uint, to uint) float32 { + return self.literal_costs_[to] - self.literal_costs_[from] +} + +func zopfliCostModelGetMinCostCmd(self *zopfliCostModel) float32 { + return self.min_cost_cmd_ +} + +/* REQUIRES: len >= 2, start_pos <= pos */ +/* REQUIRES: cost < kInfinity, nodes[start_pos].cost < kInfinity */ +/* Maintains the "ZopfliNode array invariant". */ +func updateZopfliNode(nodes []zopfliNode, pos uint, start_pos uint, len uint, len_code uint, dist uint, short_code uint, cost float32) { + var next *zopfliNode = &nodes[pos+len] + next.length = uint32(len | (len+9-len_code)<<25) + next.distance = uint32(dist) + next.dcode_insert_length = uint32(short_code<<27 | (pos - start_pos)) + next.u.cost = cost +} + +type posData struct { + pos uint + distance_cache [4]int + costdiff float32 + cost float32 +} + +/* Maintains the smallest 8 cost difference together with their positions */ +type startPosQueue struct { + q_ [8]posData + idx_ uint +} + +func initStartPosQueue(self *startPosQueue) { + self.idx_ = 0 +} + +func startPosQueueSize(self *startPosQueue) uint { + return brotli_min_size_t(self.idx_, 8) +} + +func startPosQueuePush(self *startPosQueue, posdata *posData) { + var offset uint = ^(self.idx_) & 7 + self.idx_++ + var len uint = startPosQueueSize(self) + var i uint + var q []posData = self.q_[:] + q[offset] = *posdata + + /* Restore the sorted order. In the list of |len| items at most |len - 1| + adjacent element comparisons / swaps are required. */ + for i = 1; i < len; i++ { + if q[offset&7].costdiff > q[(offset+1)&7].costdiff { + var tmp posData = q[offset&7] + q[offset&7] = q[(offset+1)&7] + q[(offset+1)&7] = tmp + } + + offset++ + } +} + +func startPosQueueAt(self *startPosQueue, k uint) *posData { + return &self.q_[(k-self.idx_)&7] +} + +/* Returns the minimum possible copy length that can improve the cost of any */ +/* future position. */ +func computeMinimumCopyLength(start_cost float32, nodes []zopfliNode, num_bytes uint, pos uint) uint { + var min_cost float32 = start_cost + var len uint = 2 + var next_len_bucket uint = 4 + /* Compute the minimum possible cost of reaching any future position. */ + + var next_len_offset uint = 10 + for pos+len <= num_bytes && nodes[pos+len].u.cost <= min_cost { + /* We already reached (pos + len) with no more cost than the minimum + possible cost of reaching anything from this pos, so there is no point in + looking for lengths <= len. */ + len++ + + if len == next_len_offset { + /* We reached the next copy length code bucket, so we add one more + extra bit to the minimum cost. */ + min_cost += 1.0 + + next_len_offset += next_len_bucket + next_len_bucket *= 2 + } + } + + return uint(len) +} + +/* REQUIRES: nodes[pos].cost < kInfinity + REQUIRES: nodes[0..pos] satisfies that "ZopfliNode array invariant". */ +func computeDistanceShortcut(block_start uint, pos uint, max_backward_limit uint, gap uint, nodes []zopfliNode) uint32 { + var clen uint = uint(zopfliNodeCopyLength(&nodes[pos])) + var ilen uint = uint(nodes[pos].dcode_insert_length & 0x7FFFFFF) + var dist uint = uint(zopfliNodeCopyDistance(&nodes[pos])) + + /* Since |block_start + pos| is the end position of the command, the copy part + starts from |block_start + pos - clen|. Distances that are greater than + this or greater than |max_backward_limit| + |gap| are static dictionary + references, and do not update the last distances. + Also distance code 0 (last distance) does not update the last distances. */ + if pos == 0 { + return 0 + } else if dist+clen <= block_start+pos+gap && dist <= max_backward_limit+gap && zopfliNodeDistanceCode(&nodes[pos]) > 0 { + return uint32(pos) + } else { + return nodes[pos-clen-ilen].u.shortcut + } +} + +/* Fills in dist_cache[0..3] with the last four distances (as defined by + Section 4. of the Spec) that would be used at (block_start + pos) if we + used the shortest path of commands from block_start, computed from + nodes[0..pos]. The last four distances at block_start are in + starting_dist_cache[0..3]. + REQUIRES: nodes[pos].cost < kInfinity + REQUIRES: nodes[0..pos] satisfies that "ZopfliNode array invariant". */ +func computeDistanceCache(pos uint, starting_dist_cache []int, nodes []zopfliNode, dist_cache []int) { + var idx int = 0 + var p uint = uint(nodes[pos].u.shortcut) + for idx < 4 && p > 0 { + var ilen uint = uint(nodes[p].dcode_insert_length & 0x7FFFFFF) + var clen uint = uint(zopfliNodeCopyLength(&nodes[p])) + var dist uint = uint(zopfliNodeCopyDistance(&nodes[p])) + dist_cache[idx] = int(dist) + idx++ + + /* Because of prerequisite, p >= clen + ilen >= 2. */ + p = uint(nodes[p-clen-ilen].u.shortcut) + } + + for ; idx < 4; idx++ { + dist_cache[idx] = starting_dist_cache[0] + starting_dist_cache = starting_dist_cache[1:] + } +} + +/* Maintains "ZopfliNode array invariant" and pushes node to the queue, if it + is eligible. */ +func evaluateNode(block_start uint, pos uint, max_backward_limit uint, gap uint, starting_dist_cache []int, model *zopfliCostModel, queue *startPosQueue, nodes []zopfliNode) { + /* Save cost, because ComputeDistanceCache invalidates it. */ + var node_cost float32 = nodes[pos].u.cost + nodes[pos].u.shortcut = computeDistanceShortcut(block_start, pos, max_backward_limit, gap, nodes) + if node_cost <= zopfliCostModelGetLiteralCosts(model, 0, pos) { + var posdata posData + posdata.pos = pos + posdata.cost = node_cost + posdata.costdiff = node_cost - zopfliCostModelGetLiteralCosts(model, 0, pos) + computeDistanceCache(pos, starting_dist_cache, nodes, posdata.distance_cache[:]) + startPosQueuePush(queue, &posdata) + } +} + +/* Returns longest copy length. */ +func updateNodes(num_bytes uint, block_start uint, pos uint, ringbuffer []byte, ringbuffer_mask uint, params *encoderParams, max_backward_limit uint, starting_dist_cache []int, num_matches uint, matches []backwardMatch, model *zopfliCostModel, queue *startPosQueue, nodes []zopfliNode) uint { + var cur_ix uint = block_start + pos + var cur_ix_masked uint = cur_ix & ringbuffer_mask + var max_distance uint = brotli_min_size_t(cur_ix, max_backward_limit) + var max_len uint = num_bytes - pos + var max_zopfli_len uint = maxZopfliLen(params) + var max_iters uint = maxZopfliCandidates(params) + var min_len uint + var result uint = 0 + var k uint + var gap uint = 0 + + evaluateNode(block_start, pos, max_backward_limit, gap, starting_dist_cache, model, queue, nodes) + { + var posdata *posData = startPosQueueAt(queue, 0) + var min_cost float32 = (posdata.cost + zopfliCostModelGetMinCostCmd(model) + zopfliCostModelGetLiteralCosts(model, posdata.pos, pos)) + min_len = computeMinimumCopyLength(min_cost, nodes, num_bytes, pos) + } + + /* Go over the command starting positions in order of increasing cost + difference. */ + for k = 0; k < max_iters && k < startPosQueueSize(queue); k++ { + var posdata *posData = startPosQueueAt(queue, k) + var start uint = posdata.pos + var inscode uint16 = getInsertLengthCode(pos - start) + var start_costdiff float32 = posdata.costdiff + var base_cost float32 = start_costdiff + float32(getInsertExtra(inscode)) + zopfliCostModelGetLiteralCosts(model, 0, pos) + var best_len uint = min_len - 1 + var j uint = 0 + /* Look for last distance matches using the distance cache from this + starting position. */ + for ; j < numDistanceShortCodes && best_len < max_len; j++ { + var idx uint = uint(kDistanceCacheIndex[j]) + var backward uint = uint(posdata.distance_cache[idx] + kDistanceCacheOffset[j]) + var prev_ix uint = cur_ix - backward + var len uint = 0 + var continuation byte = ringbuffer[cur_ix_masked+best_len] + if cur_ix_masked+best_len > ringbuffer_mask { + break + } + + if backward > max_distance+gap { + /* Word dictionary -> ignore. */ + continue + } + + if backward <= max_distance { + /* Regular backward reference. */ + if prev_ix >= cur_ix { + continue + } + + prev_ix &= ringbuffer_mask + if prev_ix+best_len > ringbuffer_mask || continuation != ringbuffer[prev_ix+best_len] { + continue + } + + len = findMatchLengthWithLimit(ringbuffer[prev_ix:], ringbuffer[cur_ix_masked:], max_len) + } else { + continue + } + { + var dist_cost float32 = base_cost + zopfliCostModelGetDistanceCost(model, j) + var l uint + for l = best_len + 1; l <= len; l++ { + var copycode uint16 = getCopyLengthCode(l) + var cmdcode uint16 = combineLengthCodes(inscode, copycode, j == 0) + var tmp float32 + if cmdcode < 128 { + tmp = base_cost + } else { + tmp = dist_cost + } + var cost float32 = tmp + float32(getCopyExtra(copycode)) + zopfliCostModelGetCommandCost(model, cmdcode) + if cost < nodes[pos+l].u.cost { + updateZopfliNode(nodes, pos, start, l, l, backward, j+1, cost) + result = brotli_max_size_t(result, l) + } + + best_len = l + } + } + } + + /* At higher iterations look only for new last distance matches, since + looking only for new command start positions with the same distances + does not help much. */ + if k >= 2 { + continue + } + { + /* Loop through all possible copy lengths at this position. */ + var len uint = min_len + for j = 0; j < num_matches; j++ { + var match backwardMatch = matches[j] + var dist uint = uint(match.distance) + var is_dictionary_match bool = (dist > max_distance+gap) + var dist_code uint = dist + numDistanceShortCodes - 1 + var dist_symbol uint16 + var distextra uint32 + var distnumextra uint32 + var dist_cost float32 + var max_match_len uint + /* We already tried all possible last distance matches, so we can use + normal distance code here. */ + prefixEncodeCopyDistance(dist_code, uint(params.dist.num_direct_distance_codes), uint(params.dist.distance_postfix_bits), &dist_symbol, &distextra) + + distnumextra = uint32(dist_symbol) >> 10 + dist_cost = base_cost + float32(distnumextra) + zopfliCostModelGetDistanceCost(model, uint(dist_symbol)&0x3FF) + + /* Try all copy lengths up until the maximum copy length corresponding + to this distance. If the distance refers to the static dictionary, or + the maximum length is long enough, try only one maximum length. */ + max_match_len = backwardMatchLength(&match) + + if len < max_match_len && (is_dictionary_match || max_match_len > max_zopfli_len) { + len = max_match_len + } + + for ; len <= max_match_len; len++ { + var len_code uint + if is_dictionary_match { + len_code = backwardMatchLengthCode(&match) + } else { + len_code = len + } + var copycode uint16 = getCopyLengthCode(len_code) + var cmdcode uint16 = combineLengthCodes(inscode, copycode, false) + var cost float32 = dist_cost + float32(getCopyExtra(copycode)) + zopfliCostModelGetCommandCost(model, cmdcode) + if cost < nodes[pos+len].u.cost { + updateZopfliNode(nodes, pos, start, uint(len), len_code, dist, 0, cost) + if len > result { + result = len + } + } + } + } + } + } + + return result +} + +func computeShortestPathFromNodes(num_bytes uint, nodes []zopfliNode) uint { + var index uint = num_bytes + var num_commands uint = 0 + for nodes[index].dcode_insert_length&0x7FFFFFF == 0 && nodes[index].length == 1 { + index-- + } + nodes[index].u.next = math.MaxUint32 + for index != 0 { + var len uint = uint(zopfliNodeCommandLength(&nodes[index])) + index -= uint(len) + nodes[index].u.next = uint32(len) + num_commands++ + } + + return num_commands +} + +/* REQUIRES: nodes != NULL and len(nodes) >= num_bytes + 1 */ +func zopfliCreateCommands(num_bytes uint, block_start uint, nodes []zopfliNode, dist_cache []int, last_insert_len *uint, params *encoderParams, commands *[]command, num_literals *uint) { + var max_backward_limit uint = maxBackwardLimit(params.lgwin) + var pos uint = 0 + var offset uint32 = nodes[0].u.next + var i uint + var gap uint = 0 + for i = 0; offset != math.MaxUint32; i++ { + var next *zopfliNode = &nodes[uint32(pos)+offset] + var copy_length uint = uint(zopfliNodeCopyLength(next)) + var insert_length uint = uint(next.dcode_insert_length & 0x7FFFFFF) + pos += insert_length + offset = next.u.next + if i == 0 { + insert_length += *last_insert_len + *last_insert_len = 0 + } + { + var distance uint = uint(zopfliNodeCopyDistance(next)) + var len_code uint = uint(zopfliNodeLengthCode(next)) + var max_distance uint = brotli_min_size_t(block_start+pos, max_backward_limit) + var is_dictionary bool = (distance > max_distance+gap) + var dist_code uint = uint(zopfliNodeDistanceCode(next)) + *commands = append(*commands, makeCommand(¶ms.dist, insert_length, copy_length, int(len_code)-int(copy_length), dist_code)) + + if !is_dictionary && dist_code > 0 { + dist_cache[3] = dist_cache[2] + dist_cache[2] = dist_cache[1] + dist_cache[1] = dist_cache[0] + dist_cache[0] = int(distance) + } + } + + *num_literals += insert_length + pos += copy_length + } + + *last_insert_len += num_bytes - pos +} + +func zopfliIterate(num_bytes uint, position uint, ringbuffer []byte, ringbuffer_mask uint, params *encoderParams, gap uint, dist_cache []int, model *zopfliCostModel, num_matches []uint32, matches []backwardMatch, nodes []zopfliNode) uint { + var max_backward_limit uint = maxBackwardLimit(params.lgwin) + var max_zopfli_len uint = maxZopfliLen(params) + var queue startPosQueue + var cur_match_pos uint = 0 + var i uint + nodes[0].length = 0 + nodes[0].u.cost = 0 + initStartPosQueue(&queue) + for i = 0; i+3 < num_bytes; i++ { + var skip uint = updateNodes(num_bytes, position, i, ringbuffer, ringbuffer_mask, params, max_backward_limit, dist_cache, uint(num_matches[i]), matches[cur_match_pos:], model, &queue, nodes) + if skip < longCopyQuickStep { + skip = 0 + } + cur_match_pos += uint(num_matches[i]) + if num_matches[i] == 1 && backwardMatchLength(&matches[cur_match_pos-1]) > max_zopfli_len { + skip = brotli_max_size_t(backwardMatchLength(&matches[cur_match_pos-1]), skip) + } + + if skip > 1 { + skip-- + for skip != 0 { + i++ + if i+3 >= num_bytes { + break + } + evaluateNode(position, i, max_backward_limit, gap, dist_cache, model, &queue, nodes) + cur_match_pos += uint(num_matches[i]) + skip-- + } + } + } + + return computeShortestPathFromNodes(num_bytes, nodes) +} + +/* Computes the shortest path of commands from position to at most + position + num_bytes. + + On return, path->size() is the number of commands found and path[i] is the + length of the i-th command (copy length plus insert length). + Note that the sum of the lengths of all commands can be less than num_bytes. + + On return, the nodes[0..num_bytes] array will have the following + "ZopfliNode array invariant": + For each i in [1..num_bytes], if nodes[i].cost < kInfinity, then + (1) nodes[i].copy_length() >= 2 + (2) nodes[i].command_length() <= i and + (3) nodes[i - nodes[i].command_length()].cost < kInfinity + + REQUIRES: nodes != nil and len(nodes) >= num_bytes + 1 */ +func zopfliComputeShortestPath(num_bytes uint, position uint, ringbuffer []byte, ringbuffer_mask uint, params *encoderParams, dist_cache []int, hasher *h10, nodes []zopfliNode) uint { + var max_backward_limit uint = maxBackwardLimit(params.lgwin) + var max_zopfli_len uint = maxZopfliLen(params) + var model zopfliCostModel + var queue startPosQueue + var matches [2 * (maxNumMatchesH10 + 64)]backwardMatch + var store_end uint + if num_bytes >= hasher.StoreLookahead() { + store_end = position + num_bytes - hasher.StoreLookahead() + 1 + } else { + store_end = position + } + var i uint + var gap uint = 0 + var lz_matches_offset uint = 0 + nodes[0].length = 0 + nodes[0].u.cost = 0 + initZopfliCostModel(&model, ¶ms.dist, num_bytes) + zopfliCostModelSetFromLiteralCosts(&model, position, ringbuffer, ringbuffer_mask) + initStartPosQueue(&queue) + for i = 0; i+hasher.HashTypeLength()-1 < num_bytes; i++ { + var pos uint = position + i + var max_distance uint = brotli_min_size_t(pos, max_backward_limit) + var skip uint + var num_matches uint + num_matches = findAllMatchesH10(hasher, ¶ms.dictionary, ringbuffer, ringbuffer_mask, pos, num_bytes-i, max_distance, gap, params, matches[lz_matches_offset:]) + if num_matches > 0 && backwardMatchLength(&matches[num_matches-1]) > max_zopfli_len { + matches[0] = matches[num_matches-1] + num_matches = 1 + } + + skip = updateNodes(num_bytes, position, i, ringbuffer, ringbuffer_mask, params, max_backward_limit, dist_cache, num_matches, matches[:], &model, &queue, nodes) + if skip < longCopyQuickStep { + skip = 0 + } + if num_matches == 1 && backwardMatchLength(&matches[0]) > max_zopfli_len { + skip = brotli_max_size_t(backwardMatchLength(&matches[0]), skip) + } + + if skip > 1 { + /* Add the tail of the copy to the hasher. */ + hasher.StoreRange(ringbuffer, ringbuffer_mask, pos+1, brotli_min_size_t(pos+skip, store_end)) + + skip-- + for skip != 0 { + i++ + if i+hasher.HashTypeLength()-1 >= num_bytes { + break + } + evaluateNode(position, i, max_backward_limit, gap, dist_cache, &model, &queue, nodes) + skip-- + } + } + } + + cleanupZopfliCostModel(&model) + return computeShortestPathFromNodes(num_bytes, nodes) +} + +func createZopfliBackwardReferences(num_bytes uint, position uint, ringbuffer []byte, ringbuffer_mask uint, params *encoderParams, hasher *h10, dist_cache []int, last_insert_len *uint, commands *[]command, num_literals *uint) { + var nodes []zopfliNode + nodes = make([]zopfliNode, (num_bytes + 1)) + initZopfliNodes(nodes, num_bytes+1) + zopfliComputeShortestPath(num_bytes, position, ringbuffer, ringbuffer_mask, params, dist_cache, hasher, nodes) + zopfliCreateCommands(num_bytes, position, nodes, dist_cache, last_insert_len, params, commands, num_literals) + nodes = nil +} + +func createHqZopfliBackwardReferences(num_bytes uint, position uint, ringbuffer []byte, ringbuffer_mask uint, params *encoderParams, hasher hasherHandle, dist_cache []int, last_insert_len *uint, commands *[]command, num_literals *uint) { + var max_backward_limit uint = maxBackwardLimit(params.lgwin) + var num_matches []uint32 = make([]uint32, num_bytes) + var matches_size uint = 4 * num_bytes + var store_end uint + if num_bytes >= hasher.StoreLookahead() { + store_end = position + num_bytes - hasher.StoreLookahead() + 1 + } else { + store_end = position + } + var cur_match_pos uint = 0 + var i uint + var orig_num_literals uint + var orig_last_insert_len uint + var orig_dist_cache [4]int + var orig_num_commands int + var model zopfliCostModel + var nodes []zopfliNode + var matches []backwardMatch = make([]backwardMatch, matches_size) + var gap uint = 0 + var shadow_matches uint = 0 + var new_array []backwardMatch + for i = 0; i+hasher.HashTypeLength()-1 < num_bytes; i++ { + var pos uint = position + i + var max_distance uint = brotli_min_size_t(pos, max_backward_limit) + var max_length uint = num_bytes - i + var num_found_matches uint + var cur_match_end uint + var j uint + + /* Ensure that we have enough free slots. */ + if matches_size < cur_match_pos+maxNumMatchesH10+shadow_matches { + var new_size uint = matches_size + if new_size == 0 { + new_size = cur_match_pos + maxNumMatchesH10 + shadow_matches + } + + for new_size < cur_match_pos+maxNumMatchesH10+shadow_matches { + new_size *= 2 + } + + new_array = make([]backwardMatch, new_size) + if matches_size != 0 { + copy(new_array, matches[:matches_size]) + } + + matches = new_array + matches_size = new_size + } + + num_found_matches = findAllMatchesH10(hasher.(*h10), ¶ms.dictionary, ringbuffer, ringbuffer_mask, pos, max_length, max_distance, gap, params, matches[cur_match_pos+shadow_matches:]) + cur_match_end = cur_match_pos + num_found_matches + for j = cur_match_pos; j+1 < cur_match_end; j++ { + assert(backwardMatchLength(&matches[j]) <= backwardMatchLength(&matches[j+1])) + } + + num_matches[i] = uint32(num_found_matches) + if num_found_matches > 0 { + var match_len uint = backwardMatchLength(&matches[cur_match_end-1]) + if match_len > maxZopfliLenQuality11 { + var skip uint = match_len - 1 + matches[cur_match_pos] = matches[cur_match_end-1] + cur_match_pos++ + num_matches[i] = 1 + + /* Add the tail of the copy to the hasher. */ + hasher.StoreRange(ringbuffer, ringbuffer_mask, pos+1, brotli_min_size_t(pos+match_len, store_end)) + var pos uint = i + for i := 0; i < int(skip); i++ { + num_matches[pos+1:][i] = 0 + } + i += skip + } else { + cur_match_pos = cur_match_end + } + } + } + + orig_num_literals = *num_literals + orig_last_insert_len = *last_insert_len + copy(orig_dist_cache[:], dist_cache[:4]) + orig_num_commands = len(*commands) + nodes = make([]zopfliNode, (num_bytes + 1)) + initZopfliCostModel(&model, ¶ms.dist, num_bytes) + for i = 0; i < 2; i++ { + initZopfliNodes(nodes, num_bytes+1) + if i == 0 { + zopfliCostModelSetFromLiteralCosts(&model, position, ringbuffer, ringbuffer_mask) + } else { + zopfliCostModelSetFromCommands(&model, position, ringbuffer, ringbuffer_mask, (*commands)[orig_num_commands:], orig_last_insert_len) + } + + *commands = (*commands)[:orig_num_commands] + *num_literals = orig_num_literals + *last_insert_len = orig_last_insert_len + copy(dist_cache, orig_dist_cache[:4]) + zopfliIterate(num_bytes, position, ringbuffer, ringbuffer_mask, params, gap, dist_cache, &model, num_matches, matches, nodes) + zopfliCreateCommands(num_bytes, position, nodes, dist_cache, last_insert_len, params, commands, num_literals) + } + + cleanupZopfliCostModel(&model) + nodes = nil + matches = nil + num_matches = nil +} diff --git a/backend/vendor/github.com/andybalholm/brotli/bit_cost.go b/backend/vendor/github.com/andybalholm/brotli/bit_cost.go new file mode 100644 index 0000000..0005fc1 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/bit_cost.go @@ -0,0 +1,436 @@ +package brotli + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Functions to estimate the bit cost of Huffman trees. */ +func shannonEntropy(population []uint32, size uint, total *uint) float64 { + var sum uint = 0 + var retval float64 = 0 + var population_end []uint32 = population[size:] + var p uint + for -cap(population) < -cap(population_end) { + p = uint(population[0]) + population = population[1:] + sum += p + retval -= float64(p) * fastLog2(p) + } + + if sum != 0 { + retval += float64(sum) * fastLog2(sum) + } + *total = sum + return retval +} + +func bitsEntropy(population []uint32, size uint) float64 { + var sum uint + var retval float64 = shannonEntropy(population, size, &sum) + if retval < float64(sum) { + /* At least one bit per literal is needed. */ + retval = float64(sum) + } + + return retval +} + +const kOneSymbolHistogramCost float64 = 12 +const kTwoSymbolHistogramCost float64 = 20 +const kThreeSymbolHistogramCost float64 = 28 +const kFourSymbolHistogramCost float64 = 37 + +func populationCostLiteral(histogram *histogramLiteral) float64 { + var data_size uint = histogramDataSizeLiteral() + var count int = 0 + var s [5]uint + var bits float64 = 0.0 + var i uint + if histogram.total_count_ == 0 { + return kOneSymbolHistogramCost + } + + for i = 0; i < data_size; i++ { + if histogram.data_[i] > 0 { + s[count] = i + count++ + if count > 4 { + break + } + } + } + + if count == 1 { + return kOneSymbolHistogramCost + } + + if count == 2 { + return kTwoSymbolHistogramCost + float64(histogram.total_count_) + } + + if count == 3 { + var histo0 uint32 = histogram.data_[s[0]] + var histo1 uint32 = histogram.data_[s[1]] + var histo2 uint32 = histogram.data_[s[2]] + var histomax uint32 = brotli_max_uint32_t(histo0, brotli_max_uint32_t(histo1, histo2)) + return kThreeSymbolHistogramCost + 2*(float64(histo0)+float64(histo1)+float64(histo2)) - float64(histomax) + } + + if count == 4 { + var histo [4]uint32 + var h23 uint32 + var histomax uint32 + for i = 0; i < 4; i++ { + histo[i] = histogram.data_[s[i]] + } + + /* Sort */ + for i = 0; i < 4; i++ { + var j uint + for j = i + 1; j < 4; j++ { + if histo[j] > histo[i] { + var tmp uint32 = histo[j] + histo[j] = histo[i] + histo[i] = tmp + } + } + } + + h23 = histo[2] + histo[3] + histomax = brotli_max_uint32_t(h23, histo[0]) + return kFourSymbolHistogramCost + 3*float64(h23) + 2*(float64(histo[0])+float64(histo[1])) - float64(histomax) + } + { + var max_depth uint = 1 + var depth_histo = [codeLengthCodes]uint32{0} + /* In this loop we compute the entropy of the histogram and simultaneously + build a simplified histogram of the code length codes where we use the + zero repeat code 17, but we don't use the non-zero repeat code 16. */ + + var log2total float64 = fastLog2(histogram.total_count_) + for i = 0; i < data_size; { + if histogram.data_[i] > 0 { + var log2p float64 = log2total - fastLog2(uint(histogram.data_[i])) + /* Compute -log2(P(symbol)) = -log2(count(symbol)/total_count) = + = log2(total_count) - log2(count(symbol)) */ + + var depth uint = uint(log2p + 0.5) + /* Approximate the bit depth by round(-log2(P(symbol))) */ + bits += float64(histogram.data_[i]) * log2p + + if depth > 15 { + depth = 15 + } + + if depth > max_depth { + max_depth = depth + } + + depth_histo[depth]++ + i++ + } else { + var reps uint32 = 1 + /* Compute the run length of zeros and add the appropriate number of 0 + and 17 code length codes to the code length code histogram. */ + + var k uint + for k = i + 1; k < data_size && histogram.data_[k] == 0; k++ { + reps++ + } + + i += uint(reps) + if i == data_size { + /* Don't add any cost for the last zero run, since these are encoded + only implicitly. */ + break + } + + if reps < 3 { + depth_histo[0] += reps + } else { + reps -= 2 + for reps > 0 { + depth_histo[repeatZeroCodeLength]++ + + /* Add the 3 extra bits for the 17 code length code. */ + bits += 3 + + reps >>= 3 + } + } + } + } + + /* Add the estimated encoding cost of the code length code histogram. */ + bits += float64(18 + 2*max_depth) + + /* Add the entropy of the code length code histogram. */ + bits += bitsEntropy(depth_histo[:], codeLengthCodes) + } + + return bits +} + +func populationCostCommand(histogram *histogramCommand) float64 { + var data_size uint = histogramDataSizeCommand() + var count int = 0 + var s [5]uint + var bits float64 = 0.0 + var i uint + if histogram.total_count_ == 0 { + return kOneSymbolHistogramCost + } + + for i = 0; i < data_size; i++ { + if histogram.data_[i] > 0 { + s[count] = i + count++ + if count > 4 { + break + } + } + } + + if count == 1 { + return kOneSymbolHistogramCost + } + + if count == 2 { + return kTwoSymbolHistogramCost + float64(histogram.total_count_) + } + + if count == 3 { + var histo0 uint32 = histogram.data_[s[0]] + var histo1 uint32 = histogram.data_[s[1]] + var histo2 uint32 = histogram.data_[s[2]] + var histomax uint32 = brotli_max_uint32_t(histo0, brotli_max_uint32_t(histo1, histo2)) + return kThreeSymbolHistogramCost + 2*(float64(histo0)+float64(histo1)+float64(histo2)) - float64(histomax) + } + + if count == 4 { + var histo [4]uint32 + var h23 uint32 + var histomax uint32 + for i = 0; i < 4; i++ { + histo[i] = histogram.data_[s[i]] + } + + /* Sort */ + for i = 0; i < 4; i++ { + var j uint + for j = i + 1; j < 4; j++ { + if histo[j] > histo[i] { + var tmp uint32 = histo[j] + histo[j] = histo[i] + histo[i] = tmp + } + } + } + + h23 = histo[2] + histo[3] + histomax = brotli_max_uint32_t(h23, histo[0]) + return kFourSymbolHistogramCost + 3*float64(h23) + 2*(float64(histo[0])+float64(histo[1])) - float64(histomax) + } + { + var max_depth uint = 1 + var depth_histo = [codeLengthCodes]uint32{0} + /* In this loop we compute the entropy of the histogram and simultaneously + build a simplified histogram of the code length codes where we use the + zero repeat code 17, but we don't use the non-zero repeat code 16. */ + + var log2total float64 = fastLog2(histogram.total_count_) + for i = 0; i < data_size; { + if histogram.data_[i] > 0 { + var log2p float64 = log2total - fastLog2(uint(histogram.data_[i])) + /* Compute -log2(P(symbol)) = -log2(count(symbol)/total_count) = + = log2(total_count) - log2(count(symbol)) */ + + var depth uint = uint(log2p + 0.5) + /* Approximate the bit depth by round(-log2(P(symbol))) */ + bits += float64(histogram.data_[i]) * log2p + + if depth > 15 { + depth = 15 + } + + if depth > max_depth { + max_depth = depth + } + + depth_histo[depth]++ + i++ + } else { + var reps uint32 = 1 + /* Compute the run length of zeros and add the appropriate number of 0 + and 17 code length codes to the code length code histogram. */ + + var k uint + for k = i + 1; k < data_size && histogram.data_[k] == 0; k++ { + reps++ + } + + i += uint(reps) + if i == data_size { + /* Don't add any cost for the last zero run, since these are encoded + only implicitly. */ + break + } + + if reps < 3 { + depth_histo[0] += reps + } else { + reps -= 2 + for reps > 0 { + depth_histo[repeatZeroCodeLength]++ + + /* Add the 3 extra bits for the 17 code length code. */ + bits += 3 + + reps >>= 3 + } + } + } + } + + /* Add the estimated encoding cost of the code length code histogram. */ + bits += float64(18 + 2*max_depth) + + /* Add the entropy of the code length code histogram. */ + bits += bitsEntropy(depth_histo[:], codeLengthCodes) + } + + return bits +} + +func populationCostDistance(histogram *histogramDistance) float64 { + var data_size uint = histogramDataSizeDistance() + var count int = 0 + var s [5]uint + var bits float64 = 0.0 + var i uint + if histogram.total_count_ == 0 { + return kOneSymbolHistogramCost + } + + for i = 0; i < data_size; i++ { + if histogram.data_[i] > 0 { + s[count] = i + count++ + if count > 4 { + break + } + } + } + + if count == 1 { + return kOneSymbolHistogramCost + } + + if count == 2 { + return kTwoSymbolHistogramCost + float64(histogram.total_count_) + } + + if count == 3 { + var histo0 uint32 = histogram.data_[s[0]] + var histo1 uint32 = histogram.data_[s[1]] + var histo2 uint32 = histogram.data_[s[2]] + var histomax uint32 = brotli_max_uint32_t(histo0, brotli_max_uint32_t(histo1, histo2)) + return kThreeSymbolHistogramCost + 2*(float64(histo0)+float64(histo1)+float64(histo2)) - float64(histomax) + } + + if count == 4 { + var histo [4]uint32 + var h23 uint32 + var histomax uint32 + for i = 0; i < 4; i++ { + histo[i] = histogram.data_[s[i]] + } + + /* Sort */ + for i = 0; i < 4; i++ { + var j uint + for j = i + 1; j < 4; j++ { + if histo[j] > histo[i] { + var tmp uint32 = histo[j] + histo[j] = histo[i] + histo[i] = tmp + } + } + } + + h23 = histo[2] + histo[3] + histomax = brotli_max_uint32_t(h23, histo[0]) + return kFourSymbolHistogramCost + 3*float64(h23) + 2*(float64(histo[0])+float64(histo[1])) - float64(histomax) + } + { + var max_depth uint = 1 + var depth_histo = [codeLengthCodes]uint32{0} + /* In this loop we compute the entropy of the histogram and simultaneously + build a simplified histogram of the code length codes where we use the + zero repeat code 17, but we don't use the non-zero repeat code 16. */ + + var log2total float64 = fastLog2(histogram.total_count_) + for i = 0; i < data_size; { + if histogram.data_[i] > 0 { + var log2p float64 = log2total - fastLog2(uint(histogram.data_[i])) + /* Compute -log2(P(symbol)) = -log2(count(symbol)/total_count) = + = log2(total_count) - log2(count(symbol)) */ + + var depth uint = uint(log2p + 0.5) + /* Approximate the bit depth by round(-log2(P(symbol))) */ + bits += float64(histogram.data_[i]) * log2p + + if depth > 15 { + depth = 15 + } + + if depth > max_depth { + max_depth = depth + } + + depth_histo[depth]++ + i++ + } else { + var reps uint32 = 1 + /* Compute the run length of zeros and add the appropriate number of 0 + and 17 code length codes to the code length code histogram. */ + + var k uint + for k = i + 1; k < data_size && histogram.data_[k] == 0; k++ { + reps++ + } + + i += uint(reps) + if i == data_size { + /* Don't add any cost for the last zero run, since these are encoded + only implicitly. */ + break + } + + if reps < 3 { + depth_histo[0] += reps + } else { + reps -= 2 + for reps > 0 { + depth_histo[repeatZeroCodeLength]++ + + /* Add the 3 extra bits for the 17 code length code. */ + bits += 3 + + reps >>= 3 + } + } + } + } + + /* Add the estimated encoding cost of the code length code histogram. */ + bits += float64(18 + 2*max_depth) + + /* Add the entropy of the code length code histogram. */ + bits += bitsEntropy(depth_histo[:], codeLengthCodes) + } + + return bits +} diff --git a/backend/vendor/github.com/andybalholm/brotli/bit_reader.go b/backend/vendor/github.com/andybalholm/brotli/bit_reader.go new file mode 100644 index 0000000..fba8687 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/bit_reader.go @@ -0,0 +1,266 @@ +package brotli + +import "encoding/binary" + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Bit reading helpers */ + +const shortFillBitWindowRead = (8 >> 1) + +var kBitMask = [33]uint32{ + 0x00000000, + 0x00000001, + 0x00000003, + 0x00000007, + 0x0000000F, + 0x0000001F, + 0x0000003F, + 0x0000007F, + 0x000000FF, + 0x000001FF, + 0x000003FF, + 0x000007FF, + 0x00000FFF, + 0x00001FFF, + 0x00003FFF, + 0x00007FFF, + 0x0000FFFF, + 0x0001FFFF, + 0x0003FFFF, + 0x0007FFFF, + 0x000FFFFF, + 0x001FFFFF, + 0x003FFFFF, + 0x007FFFFF, + 0x00FFFFFF, + 0x01FFFFFF, + 0x03FFFFFF, + 0x07FFFFFF, + 0x0FFFFFFF, + 0x1FFFFFFF, + 0x3FFFFFFF, + 0x7FFFFFFF, + 0xFFFFFFFF, +} + +func bitMask(n uint32) uint32 { + return kBitMask[n] +} + +type bitReader struct { + val_ uint64 + bit_pos_ uint32 + input []byte + input_len uint + byte_pos uint +} + +type bitReaderState struct { + val_ uint64 + bit_pos_ uint32 + input []byte + input_len uint + byte_pos uint +} + +/* Initializes the BrotliBitReader fields. */ + +/* Ensures that accumulator is not empty. + May consume up to sizeof(brotli_reg_t) - 1 bytes of input. + Returns false if data is required but there is no input available. + For BROTLI_ALIGNED_READ this function also prepares bit reader for aligned + reading. */ +func bitReaderSaveState(from *bitReader, to *bitReaderState) { + to.val_ = from.val_ + to.bit_pos_ = from.bit_pos_ + to.input = from.input + to.input_len = from.input_len + to.byte_pos = from.byte_pos +} + +func bitReaderRestoreState(to *bitReader, from *bitReaderState) { + to.val_ = from.val_ + to.bit_pos_ = from.bit_pos_ + to.input = from.input + to.input_len = from.input_len + to.byte_pos = from.byte_pos +} + +func getAvailableBits(br *bitReader) uint32 { + return 64 - br.bit_pos_ +} + +/* Returns amount of unread bytes the bit reader still has buffered from the + BrotliInput, including whole bytes in br->val_. */ +func getRemainingBytes(br *bitReader) uint { + return uint(uint32(br.input_len-br.byte_pos) + (getAvailableBits(br) >> 3)) +} + +/* Checks if there is at least |num| bytes left in the input ring-buffer + (excluding the bits remaining in br->val_). */ +func checkInputAmount(br *bitReader, num uint) bool { + return br.input_len-br.byte_pos >= num +} + +/* Guarantees that there are at least |n_bits| + 1 bits in accumulator. + Precondition: accumulator contains at least 1 bit. + |n_bits| should be in the range [1..24] for regular build. For portable + non-64-bit little-endian build only 16 bits are safe to request. */ +func fillBitWindow(br *bitReader, n_bits uint32) { + if br.bit_pos_ >= 32 { + br.val_ >>= 32 + br.bit_pos_ ^= 32 /* here same as -= 32 because of the if condition */ + br.val_ |= (uint64(binary.LittleEndian.Uint32(br.input[br.byte_pos:]))) << 32 + br.byte_pos += 4 + } +} + +/* Mostly like BrotliFillBitWindow, but guarantees only 16 bits and reads no + more than BROTLI_SHORT_FILL_BIT_WINDOW_READ bytes of input. */ +func fillBitWindow16(br *bitReader) { + fillBitWindow(br, 17) +} + +/* Tries to pull one byte of input to accumulator. + Returns false if there is no input available. */ +func pullByte(br *bitReader) bool { + if br.byte_pos == br.input_len { + return false + } + + br.val_ >>= 8 + br.val_ |= (uint64(br.input[br.byte_pos])) << 56 + br.bit_pos_ -= 8 + br.byte_pos++ + return true +} + +/* Returns currently available bits. + The number of valid bits could be calculated by BrotliGetAvailableBits. */ +func getBitsUnmasked(br *bitReader) uint64 { + return br.val_ >> br.bit_pos_ +} + +/* Like BrotliGetBits, but does not mask the result. + The result contains at least 16 valid bits. */ +func get16BitsUnmasked(br *bitReader) uint32 { + fillBitWindow(br, 16) + return uint32(getBitsUnmasked(br)) +} + +/* Returns the specified number of bits from |br| without advancing bit + position. */ +func getBits(br *bitReader, n_bits uint32) uint32 { + fillBitWindow(br, n_bits) + return uint32(getBitsUnmasked(br)) & bitMask(n_bits) +} + +/* Tries to peek the specified amount of bits. Returns false, if there + is not enough input. */ +func safeGetBits(br *bitReader, n_bits uint32, val *uint32) bool { + for getAvailableBits(br) < n_bits { + if !pullByte(br) { + return false + } + } + + *val = uint32(getBitsUnmasked(br)) & bitMask(n_bits) + return true +} + +/* Advances the bit pos by |n_bits|. */ +func dropBits(br *bitReader, n_bits uint32) { + br.bit_pos_ += n_bits +} + +func bitReaderUnload(br *bitReader) { + var unused_bytes uint32 = getAvailableBits(br) >> 3 + var unused_bits uint32 = unused_bytes << 3 + br.byte_pos -= uint(unused_bytes) + if unused_bits == 64 { + br.val_ = 0 + } else { + br.val_ <<= unused_bits + } + + br.bit_pos_ += unused_bits +} + +/* Reads the specified number of bits from |br| and advances the bit pos. + Precondition: accumulator MUST contain at least |n_bits|. */ +func takeBits(br *bitReader, n_bits uint32, val *uint32) { + *val = uint32(getBitsUnmasked(br)) & bitMask(n_bits) + dropBits(br, n_bits) +} + +/* Reads the specified number of bits from |br| and advances the bit pos. + Assumes that there is enough input to perform BrotliFillBitWindow. */ +func readBits(br *bitReader, n_bits uint32) uint32 { + var val uint32 + fillBitWindow(br, n_bits) + takeBits(br, n_bits, &val) + return val +} + +/* Tries to read the specified amount of bits. Returns false, if there + is not enough input. |n_bits| MUST be positive. */ +func safeReadBits(br *bitReader, n_bits uint32, val *uint32) bool { + for getAvailableBits(br) < n_bits { + if !pullByte(br) { + return false + } + } + + takeBits(br, n_bits, val) + return true +} + +/* Advances the bit reader position to the next byte boundary and verifies + that any skipped bits are set to zero. */ +func bitReaderJumpToByteBoundary(br *bitReader) bool { + var pad_bits_count uint32 = getAvailableBits(br) & 0x7 + var pad_bits uint32 = 0 + if pad_bits_count != 0 { + takeBits(br, pad_bits_count, &pad_bits) + } + + return pad_bits == 0 +} + +/* Copies remaining input bytes stored in the bit reader to the output. Value + |num| may not be larger than BrotliGetRemainingBytes. The bit reader must be + warmed up again after this. */ +func copyBytes(dest []byte, br *bitReader, num uint) { + for getAvailableBits(br) >= 8 && num > 0 { + dest[0] = byte(getBitsUnmasked(br)) + dropBits(br, 8) + dest = dest[1:] + num-- + } + + copy(dest, br.input[br.byte_pos:][:num]) + br.byte_pos += num +} + +func initBitReader(br *bitReader) { + br.val_ = 0 + br.bit_pos_ = 64 +} + +func warmupBitReader(br *bitReader) bool { + /* Fixing alignment after unaligned BrotliFillWindow would result accumulator + overflow. If unalignment is caused by BrotliSafeReadBits, then there is + enough space in accumulator to fix alignment. */ + if getAvailableBits(br) == 0 { + if !pullByte(br) { + return false + } + } + + return true +} diff --git a/backend/vendor/github.com/andybalholm/brotli/bitwriter.go b/backend/vendor/github.com/andybalholm/brotli/bitwriter.go new file mode 100644 index 0000000..dfc6036 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/bitwriter.go @@ -0,0 +1,56 @@ +package brotli + +/* Copyright 2010 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Write bits into a byte array. */ + +type bitWriter struct { + dst []byte + + // Data waiting to be written is the low nbits of bits. + bits uint64 + nbits uint +} + +func (w *bitWriter) writeBits(nb uint, b uint64) { + w.bits |= b << w.nbits + w.nbits += nb + if w.nbits >= 32 { + bits := w.bits + w.bits >>= 32 + w.nbits -= 32 + w.dst = append(w.dst, + byte(bits), + byte(bits>>8), + byte(bits>>16), + byte(bits>>24), + ) + } +} + +func (w *bitWriter) writeSingleBit(bit bool) { + if bit { + w.writeBits(1, 1) + } else { + w.writeBits(1, 0) + } +} + +func (w *bitWriter) jumpToByteBoundary() { + dst := w.dst + for w.nbits != 0 { + dst = append(dst, byte(w.bits)) + w.bits >>= 8 + if w.nbits > 8 { // Avoid underflow + w.nbits -= 8 + } else { + w.nbits = 0 + } + } + w.bits = 0 + w.dst = dst +} diff --git a/backend/vendor/github.com/andybalholm/brotli/block_splitter.go b/backend/vendor/github.com/andybalholm/brotli/block_splitter.go new file mode 100644 index 0000000..978a131 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/block_splitter.go @@ -0,0 +1,144 @@ +package brotli + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Block split point selection utilities. */ + +type blockSplit struct { + num_types uint + num_blocks uint + types []byte + lengths []uint32 + types_alloc_size uint + lengths_alloc_size uint +} + +const ( + kMaxLiteralHistograms uint = 100 + kMaxCommandHistograms uint = 50 + kLiteralBlockSwitchCost float64 = 28.1 + kCommandBlockSwitchCost float64 = 13.5 + kDistanceBlockSwitchCost float64 = 14.6 + kLiteralStrideLength uint = 70 + kCommandStrideLength uint = 40 + kSymbolsPerLiteralHistogram uint = 544 + kSymbolsPerCommandHistogram uint = 530 + kSymbolsPerDistanceHistogram uint = 544 + kMinLengthForBlockSplitting uint = 128 + kIterMulForRefining uint = 2 + kMinItersForRefining uint = 100 +) + +func countLiterals(cmds []command) uint { + var total_length uint = 0 + /* Count how many we have. */ + + for i := range cmds { + total_length += uint(cmds[i].insert_len_) + } + + return total_length +} + +func copyLiteralsToByteArray(cmds []command, data []byte, offset uint, mask uint, literals []byte) { + var pos uint = 0 + var from_pos uint = offset & mask + for i := range cmds { + var insert_len uint = uint(cmds[i].insert_len_) + if from_pos+insert_len > mask { + var head_size uint = mask + 1 - from_pos + copy(literals[pos:], data[from_pos:][:head_size]) + from_pos = 0 + pos += head_size + insert_len -= head_size + } + + if insert_len > 0 { + copy(literals[pos:], data[from_pos:][:insert_len]) + pos += insert_len + } + + from_pos = uint((uint32(from_pos+insert_len) + commandCopyLen(&cmds[i])) & uint32(mask)) + } +} + +func myRand(seed *uint32) uint32 { + /* Initial seed should be 7. In this case, loop length is (1 << 29). */ + *seed *= 16807 + + return *seed +} + +func bitCost(count uint) float64 { + if count == 0 { + return -2.0 + } else { + return fastLog2(count) + } +} + +const histogramsPerBatch = 64 + +const clustersPerBatch = 16 + +func initBlockSplit(self *blockSplit) { + self.num_types = 0 + self.num_blocks = 0 + self.types = self.types[:0] + self.lengths = self.lengths[:0] + self.types_alloc_size = 0 + self.lengths_alloc_size = 0 +} + +func splitBlock(cmds []command, data []byte, pos uint, mask uint, params *encoderParams, literal_split *blockSplit, insert_and_copy_split *blockSplit, dist_split *blockSplit) { + { + var literals_count uint = countLiterals(cmds) + var literals []byte = make([]byte, literals_count) + + /* Create a continuous array of literals. */ + copyLiteralsToByteArray(cmds, data, pos, mask, literals) + + /* Create the block split on the array of literals. + Literal histograms have alphabet size 256. */ + splitByteVectorLiteral(literals, literals_count, kSymbolsPerLiteralHistogram, kMaxLiteralHistograms, kLiteralStrideLength, kLiteralBlockSwitchCost, params, literal_split) + + literals = nil + } + { + var insert_and_copy_codes []uint16 = make([]uint16, len(cmds)) + /* Compute prefix codes for commands. */ + + for i := range cmds { + insert_and_copy_codes[i] = cmds[i].cmd_prefix_ + } + + /* Create the block split on the array of command prefixes. */ + splitByteVectorCommand(insert_and_copy_codes, kSymbolsPerCommandHistogram, kMaxCommandHistograms, kCommandStrideLength, kCommandBlockSwitchCost, params, insert_and_copy_split) + + /* TODO: reuse for distances? */ + + insert_and_copy_codes = nil + } + { + var distance_prefixes []uint16 = make([]uint16, len(cmds)) + var j uint = 0 + /* Create a continuous array of distance prefixes. */ + + for i := range cmds { + var cmd *command = &cmds[i] + if commandCopyLen(cmd) != 0 && cmd.cmd_prefix_ >= 128 { + distance_prefixes[j] = cmd.dist_prefix_ & 0x3FF + j++ + } + } + + /* Create the block split on the array of distance prefixes. */ + splitByteVectorDistance(distance_prefixes, j, kSymbolsPerDistanceHistogram, kMaxCommandHistograms, kCommandStrideLength, kDistanceBlockSwitchCost, params, dist_split) + + distance_prefixes = nil + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/block_splitter_command.go b/backend/vendor/github.com/andybalholm/brotli/block_splitter_command.go new file mode 100644 index 0000000..9dec13e --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/block_splitter_command.go @@ -0,0 +1,434 @@ +package brotli + +import "math" + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +func initialEntropyCodesCommand(data []uint16, length uint, stride uint, num_histograms uint, histograms []histogramCommand) { + var seed uint32 = 7 + var block_length uint = length / num_histograms + var i uint + clearHistogramsCommand(histograms, num_histograms) + for i = 0; i < num_histograms; i++ { + var pos uint = length * i / num_histograms + if i != 0 { + pos += uint(myRand(&seed) % uint32(block_length)) + } + + if pos+stride >= length { + pos = length - stride - 1 + } + + histogramAddVectorCommand(&histograms[i], data[pos:], stride) + } +} + +func randomSampleCommand(seed *uint32, data []uint16, length uint, stride uint, sample *histogramCommand) { + var pos uint = 0 + if stride >= length { + stride = length + } else { + pos = uint(myRand(seed) % uint32(length-stride+1)) + } + + histogramAddVectorCommand(sample, data[pos:], stride) +} + +func refineEntropyCodesCommand(data []uint16, length uint, stride uint, num_histograms uint, histograms []histogramCommand) { + var iters uint = kIterMulForRefining*length/stride + kMinItersForRefining + var seed uint32 = 7 + var iter uint + iters = ((iters + num_histograms - 1) / num_histograms) * num_histograms + for iter = 0; iter < iters; iter++ { + var sample histogramCommand + histogramClearCommand(&sample) + randomSampleCommand(&seed, data, length, stride, &sample) + histogramAddHistogramCommand(&histograms[iter%num_histograms], &sample) + } +} + +/* Assigns a block id from the range [0, num_histograms) to each data element + in data[0..length) and fills in block_id[0..length) with the assigned values. + Returns the number of blocks, i.e. one plus the number of block switches. */ +func findBlocksCommand(data []uint16, length uint, block_switch_bitcost float64, num_histograms uint, histograms []histogramCommand, insert_cost []float64, cost []float64, switch_signal []byte, block_id []byte) uint { + var data_size uint = histogramDataSizeCommand() + var bitmaplen uint = (num_histograms + 7) >> 3 + var num_blocks uint = 1 + var i uint + var j uint + assert(num_histograms <= 256) + if num_histograms <= 1 { + for i = 0; i < length; i++ { + block_id[i] = 0 + } + + return 1 + } + + for i := 0; i < int(data_size*num_histograms); i++ { + insert_cost[i] = 0 + } + for i = 0; i < num_histograms; i++ { + insert_cost[i] = fastLog2(uint(uint32(histograms[i].total_count_))) + } + + for i = data_size; i != 0; { + i-- + for j = 0; j < num_histograms; j++ { + insert_cost[i*num_histograms+j] = insert_cost[j] - bitCost(uint(histograms[j].data_[i])) + } + } + + for i := 0; i < int(num_histograms); i++ { + cost[i] = 0 + } + for i := 0; i < int(length*bitmaplen); i++ { + switch_signal[i] = 0 + } + + /* After each iteration of this loop, cost[k] will contain the difference + between the minimum cost of arriving at the current byte position using + entropy code k, and the minimum cost of arriving at the current byte + position. This difference is capped at the block switch cost, and if it + reaches block switch cost, it means that when we trace back from the last + position, we need to switch here. */ + for i = 0; i < length; i++ { + var byte_ix uint = i + var ix uint = byte_ix * bitmaplen + var insert_cost_ix uint = uint(data[byte_ix]) * num_histograms + var min_cost float64 = 1e99 + var block_switch_cost float64 = block_switch_bitcost + var k uint + for k = 0; k < num_histograms; k++ { + /* We are coding the symbol in data[byte_ix] with entropy code k. */ + cost[k] += insert_cost[insert_cost_ix+k] + + if cost[k] < min_cost { + min_cost = cost[k] + block_id[byte_ix] = byte(k) + } + } + + /* More blocks for the beginning. */ + if byte_ix < 2000 { + block_switch_cost *= 0.77 + 0.07*float64(byte_ix)/2000 + } + + for k = 0; k < num_histograms; k++ { + cost[k] -= min_cost + if cost[k] >= block_switch_cost { + var mask byte = byte(1 << (k & 7)) + cost[k] = block_switch_cost + assert(k>>3 < bitmaplen) + switch_signal[ix+(k>>3)] |= mask + /* Trace back from the last position and switch at the marked places. */ + } + } + } + { + var byte_ix uint = length - 1 + var ix uint = byte_ix * bitmaplen + var cur_id byte = block_id[byte_ix] + for byte_ix > 0 { + var mask byte = byte(1 << (cur_id & 7)) + assert(uint(cur_id)>>3 < bitmaplen) + byte_ix-- + ix -= bitmaplen + if switch_signal[ix+uint(cur_id>>3)]&mask != 0 { + if cur_id != block_id[byte_ix] { + cur_id = block_id[byte_ix] + num_blocks++ + } + } + + block_id[byte_ix] = cur_id + } + } + + return num_blocks +} + +var remapBlockIdsCommand_kInvalidId uint16 = 256 + +func remapBlockIdsCommand(block_ids []byte, length uint, new_id []uint16, num_histograms uint) uint { + var next_id uint16 = 0 + var i uint + for i = 0; i < num_histograms; i++ { + new_id[i] = remapBlockIdsCommand_kInvalidId + } + + for i = 0; i < length; i++ { + assert(uint(block_ids[i]) < num_histograms) + if new_id[block_ids[i]] == remapBlockIdsCommand_kInvalidId { + new_id[block_ids[i]] = next_id + next_id++ + } + } + + for i = 0; i < length; i++ { + block_ids[i] = byte(new_id[block_ids[i]]) + assert(uint(block_ids[i]) < num_histograms) + } + + assert(uint(next_id) <= num_histograms) + return uint(next_id) +} + +func buildBlockHistogramsCommand(data []uint16, length uint, block_ids []byte, num_histograms uint, histograms []histogramCommand) { + var i uint + clearHistogramsCommand(histograms, num_histograms) + for i = 0; i < length; i++ { + histogramAddCommand(&histograms[block_ids[i]], uint(data[i])) + } +} + +var clusterBlocksCommand_kInvalidIndex uint32 = math.MaxUint32 + +func clusterBlocksCommand(data []uint16, length uint, num_blocks uint, block_ids []byte, split *blockSplit) { + var histogram_symbols []uint32 = make([]uint32, num_blocks) + var block_lengths []uint32 = make([]uint32, num_blocks) + var expected_num_clusters uint = clustersPerBatch * (num_blocks + histogramsPerBatch - 1) / histogramsPerBatch + var all_histograms_size uint = 0 + var all_histograms_capacity uint = expected_num_clusters + var all_histograms []histogramCommand = make([]histogramCommand, all_histograms_capacity) + var cluster_size_size uint = 0 + var cluster_size_capacity uint = expected_num_clusters + var cluster_size []uint32 = make([]uint32, cluster_size_capacity) + var num_clusters uint = 0 + var histograms []histogramCommand = make([]histogramCommand, brotli_min_size_t(num_blocks, histogramsPerBatch)) + var max_num_pairs uint = histogramsPerBatch * histogramsPerBatch / 2 + var pairs_capacity uint = max_num_pairs + 1 + var pairs []histogramPair = make([]histogramPair, pairs_capacity) + var pos uint = 0 + var clusters []uint32 + var num_final_clusters uint + var new_index []uint32 + var i uint + var sizes = [histogramsPerBatch]uint32{0} + var new_clusters = [histogramsPerBatch]uint32{0} + var symbols = [histogramsPerBatch]uint32{0} + var remap = [histogramsPerBatch]uint32{0} + + for i := 0; i < int(num_blocks); i++ { + block_lengths[i] = 0 + } + { + var block_idx uint = 0 + for i = 0; i < length; i++ { + assert(block_idx < num_blocks) + block_lengths[block_idx]++ + if i+1 == length || block_ids[i] != block_ids[i+1] { + block_idx++ + } + } + + assert(block_idx == num_blocks) + } + + for i = 0; i < num_blocks; i += histogramsPerBatch { + var num_to_combine uint = brotli_min_size_t(num_blocks-i, histogramsPerBatch) + var num_new_clusters uint + var j uint + for j = 0; j < num_to_combine; j++ { + var k uint + histogramClearCommand(&histograms[j]) + for k = 0; uint32(k) < block_lengths[i+j]; k++ { + histogramAddCommand(&histograms[j], uint(data[pos])) + pos++ + } + + histograms[j].bit_cost_ = populationCostCommand(&histograms[j]) + new_clusters[j] = uint32(j) + symbols[j] = uint32(j) + sizes[j] = 1 + } + + num_new_clusters = histogramCombineCommand(histograms, sizes[:], symbols[:], new_clusters[:], []histogramPair(pairs), num_to_combine, num_to_combine, histogramsPerBatch, max_num_pairs) + if all_histograms_capacity < (all_histograms_size + num_new_clusters) { + var _new_size uint + if all_histograms_capacity == 0 { + _new_size = all_histograms_size + num_new_clusters + } else { + _new_size = all_histograms_capacity + } + var new_array []histogramCommand + for _new_size < (all_histograms_size + num_new_clusters) { + _new_size *= 2 + } + new_array = make([]histogramCommand, _new_size) + if all_histograms_capacity != 0 { + copy(new_array, all_histograms[:all_histograms_capacity]) + } + + all_histograms = new_array + all_histograms_capacity = _new_size + } + + brotli_ensure_capacity_uint32_t(&cluster_size, &cluster_size_capacity, cluster_size_size+num_new_clusters) + for j = 0; j < num_new_clusters; j++ { + all_histograms[all_histograms_size] = histograms[new_clusters[j]] + all_histograms_size++ + cluster_size[cluster_size_size] = sizes[new_clusters[j]] + cluster_size_size++ + remap[new_clusters[j]] = uint32(j) + } + + for j = 0; j < num_to_combine; j++ { + histogram_symbols[i+j] = uint32(num_clusters) + remap[symbols[j]] + } + + num_clusters += num_new_clusters + assert(num_clusters == cluster_size_size) + assert(num_clusters == all_histograms_size) + } + + histograms = nil + + max_num_pairs = brotli_min_size_t(64*num_clusters, (num_clusters/2)*num_clusters) + if pairs_capacity < max_num_pairs+1 { + pairs = nil + pairs = make([]histogramPair, (max_num_pairs + 1)) + } + + clusters = make([]uint32, num_clusters) + for i = 0; i < num_clusters; i++ { + clusters[i] = uint32(i) + } + + num_final_clusters = histogramCombineCommand(all_histograms, cluster_size, histogram_symbols, clusters, pairs, num_clusters, num_blocks, maxNumberOfBlockTypes, max_num_pairs) + pairs = nil + cluster_size = nil + + new_index = make([]uint32, num_clusters) + for i = 0; i < num_clusters; i++ { + new_index[i] = clusterBlocksCommand_kInvalidIndex + } + pos = 0 + { + var next_index uint32 = 0 + for i = 0; i < num_blocks; i++ { + var histo histogramCommand + var j uint + var best_out uint32 + var best_bits float64 + histogramClearCommand(&histo) + for j = 0; uint32(j) < block_lengths[i]; j++ { + histogramAddCommand(&histo, uint(data[pos])) + pos++ + } + + if i == 0 { + best_out = histogram_symbols[0] + } else { + best_out = histogram_symbols[i-1] + } + best_bits = histogramBitCostDistanceCommand(&histo, &all_histograms[best_out]) + for j = 0; j < num_final_clusters; j++ { + var cur_bits float64 = histogramBitCostDistanceCommand(&histo, &all_histograms[clusters[j]]) + if cur_bits < best_bits { + best_bits = cur_bits + best_out = clusters[j] + } + } + + histogram_symbols[i] = best_out + if new_index[best_out] == clusterBlocksCommand_kInvalidIndex { + new_index[best_out] = next_index + next_index++ + } + } + } + + clusters = nil + all_histograms = nil + brotli_ensure_capacity_uint8_t(&split.types, &split.types_alloc_size, num_blocks) + brotli_ensure_capacity_uint32_t(&split.lengths, &split.lengths_alloc_size, num_blocks) + { + var cur_length uint32 = 0 + var block_idx uint = 0 + var max_type byte = 0 + for i = 0; i < num_blocks; i++ { + cur_length += block_lengths[i] + if i+1 == num_blocks || histogram_symbols[i] != histogram_symbols[i+1] { + var id byte = byte(new_index[histogram_symbols[i]]) + split.types[block_idx] = id + split.lengths[block_idx] = cur_length + max_type = brotli_max_uint8_t(max_type, id) + cur_length = 0 + block_idx++ + } + } + + split.num_blocks = block_idx + split.num_types = uint(max_type) + 1 + } + + new_index = nil + block_lengths = nil + histogram_symbols = nil +} + +func splitByteVectorCommand(data []uint16, literals_per_histogram uint, max_histograms uint, sampling_stride_length uint, block_switch_cost float64, params *encoderParams, split *blockSplit) { + length := uint(len(data)) + var data_size uint = histogramDataSizeCommand() + var num_histograms uint = length/literals_per_histogram + 1 + var histograms []histogramCommand + if num_histograms > max_histograms { + num_histograms = max_histograms + } + + if length == 0 { + split.num_types = 1 + return + } else if length < kMinLengthForBlockSplitting { + brotli_ensure_capacity_uint8_t(&split.types, &split.types_alloc_size, split.num_blocks+1) + brotli_ensure_capacity_uint32_t(&split.lengths, &split.lengths_alloc_size, split.num_blocks+1) + split.num_types = 1 + split.types[split.num_blocks] = 0 + split.lengths[split.num_blocks] = uint32(length) + split.num_blocks++ + return + } + + histograms = make([]histogramCommand, num_histograms) + + /* Find good entropy codes. */ + initialEntropyCodesCommand(data, length, sampling_stride_length, num_histograms, histograms) + + refineEntropyCodesCommand(data, length, sampling_stride_length, num_histograms, histograms) + { + var block_ids []byte = make([]byte, length) + var num_blocks uint = 0 + var bitmaplen uint = (num_histograms + 7) >> 3 + var insert_cost []float64 = make([]float64, (data_size * num_histograms)) + var cost []float64 = make([]float64, num_histograms) + var switch_signal []byte = make([]byte, (length * bitmaplen)) + var new_id []uint16 = make([]uint16, num_histograms) + var iters uint + if params.quality < hqZopflificationQuality { + iters = 3 + } else { + iters = 10 + } + /* Find a good path through literals with the good entropy codes. */ + + var i uint + for i = 0; i < iters; i++ { + num_blocks = findBlocksCommand(data, length, block_switch_cost, num_histograms, histograms, insert_cost, cost, switch_signal, block_ids) + num_histograms = remapBlockIdsCommand(block_ids, length, new_id, num_histograms) + buildBlockHistogramsCommand(data, length, block_ids, num_histograms, histograms) + } + + insert_cost = nil + cost = nil + switch_signal = nil + new_id = nil + histograms = nil + clusterBlocksCommand(data, length, num_blocks, block_ids, split) + block_ids = nil + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/block_splitter_distance.go b/backend/vendor/github.com/andybalholm/brotli/block_splitter_distance.go new file mode 100644 index 0000000..953530d --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/block_splitter_distance.go @@ -0,0 +1,433 @@ +package brotli + +import "math" + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +func initialEntropyCodesDistance(data []uint16, length uint, stride uint, num_histograms uint, histograms []histogramDistance) { + var seed uint32 = 7 + var block_length uint = length / num_histograms + var i uint + clearHistogramsDistance(histograms, num_histograms) + for i = 0; i < num_histograms; i++ { + var pos uint = length * i / num_histograms + if i != 0 { + pos += uint(myRand(&seed) % uint32(block_length)) + } + + if pos+stride >= length { + pos = length - stride - 1 + } + + histogramAddVectorDistance(&histograms[i], data[pos:], stride) + } +} + +func randomSampleDistance(seed *uint32, data []uint16, length uint, stride uint, sample *histogramDistance) { + var pos uint = 0 + if stride >= length { + stride = length + } else { + pos = uint(myRand(seed) % uint32(length-stride+1)) + } + + histogramAddVectorDistance(sample, data[pos:], stride) +} + +func refineEntropyCodesDistance(data []uint16, length uint, stride uint, num_histograms uint, histograms []histogramDistance) { + var iters uint = kIterMulForRefining*length/stride + kMinItersForRefining + var seed uint32 = 7 + var iter uint + iters = ((iters + num_histograms - 1) / num_histograms) * num_histograms + for iter = 0; iter < iters; iter++ { + var sample histogramDistance + histogramClearDistance(&sample) + randomSampleDistance(&seed, data, length, stride, &sample) + histogramAddHistogramDistance(&histograms[iter%num_histograms], &sample) + } +} + +/* Assigns a block id from the range [0, num_histograms) to each data element + in data[0..length) and fills in block_id[0..length) with the assigned values. + Returns the number of blocks, i.e. one plus the number of block switches. */ +func findBlocksDistance(data []uint16, length uint, block_switch_bitcost float64, num_histograms uint, histograms []histogramDistance, insert_cost []float64, cost []float64, switch_signal []byte, block_id []byte) uint { + var data_size uint = histogramDataSizeDistance() + var bitmaplen uint = (num_histograms + 7) >> 3 + var num_blocks uint = 1 + var i uint + var j uint + assert(num_histograms <= 256) + if num_histograms <= 1 { + for i = 0; i < length; i++ { + block_id[i] = 0 + } + + return 1 + } + + for i := 0; i < int(data_size*num_histograms); i++ { + insert_cost[i] = 0 + } + for i = 0; i < num_histograms; i++ { + insert_cost[i] = fastLog2(uint(uint32(histograms[i].total_count_))) + } + + for i = data_size; i != 0; { + i-- + for j = 0; j < num_histograms; j++ { + insert_cost[i*num_histograms+j] = insert_cost[j] - bitCost(uint(histograms[j].data_[i])) + } + } + + for i := 0; i < int(num_histograms); i++ { + cost[i] = 0 + } + for i := 0; i < int(length*bitmaplen); i++ { + switch_signal[i] = 0 + } + + /* After each iteration of this loop, cost[k] will contain the difference + between the minimum cost of arriving at the current byte position using + entropy code k, and the minimum cost of arriving at the current byte + position. This difference is capped at the block switch cost, and if it + reaches block switch cost, it means that when we trace back from the last + position, we need to switch here. */ + for i = 0; i < length; i++ { + var byte_ix uint = i + var ix uint = byte_ix * bitmaplen + var insert_cost_ix uint = uint(data[byte_ix]) * num_histograms + var min_cost float64 = 1e99 + var block_switch_cost float64 = block_switch_bitcost + var k uint + for k = 0; k < num_histograms; k++ { + /* We are coding the symbol in data[byte_ix] with entropy code k. */ + cost[k] += insert_cost[insert_cost_ix+k] + + if cost[k] < min_cost { + min_cost = cost[k] + block_id[byte_ix] = byte(k) + } + } + + /* More blocks for the beginning. */ + if byte_ix < 2000 { + block_switch_cost *= 0.77 + 0.07*float64(byte_ix)/2000 + } + + for k = 0; k < num_histograms; k++ { + cost[k] -= min_cost + if cost[k] >= block_switch_cost { + var mask byte = byte(1 << (k & 7)) + cost[k] = block_switch_cost + assert(k>>3 < bitmaplen) + switch_signal[ix+(k>>3)] |= mask + /* Trace back from the last position and switch at the marked places. */ + } + } + } + { + var byte_ix uint = length - 1 + var ix uint = byte_ix * bitmaplen + var cur_id byte = block_id[byte_ix] + for byte_ix > 0 { + var mask byte = byte(1 << (cur_id & 7)) + assert(uint(cur_id)>>3 < bitmaplen) + byte_ix-- + ix -= bitmaplen + if switch_signal[ix+uint(cur_id>>3)]&mask != 0 { + if cur_id != block_id[byte_ix] { + cur_id = block_id[byte_ix] + num_blocks++ + } + } + + block_id[byte_ix] = cur_id + } + } + + return num_blocks +} + +var remapBlockIdsDistance_kInvalidId uint16 = 256 + +func remapBlockIdsDistance(block_ids []byte, length uint, new_id []uint16, num_histograms uint) uint { + var next_id uint16 = 0 + var i uint + for i = 0; i < num_histograms; i++ { + new_id[i] = remapBlockIdsDistance_kInvalidId + } + + for i = 0; i < length; i++ { + assert(uint(block_ids[i]) < num_histograms) + if new_id[block_ids[i]] == remapBlockIdsDistance_kInvalidId { + new_id[block_ids[i]] = next_id + next_id++ + } + } + + for i = 0; i < length; i++ { + block_ids[i] = byte(new_id[block_ids[i]]) + assert(uint(block_ids[i]) < num_histograms) + } + + assert(uint(next_id) <= num_histograms) + return uint(next_id) +} + +func buildBlockHistogramsDistance(data []uint16, length uint, block_ids []byte, num_histograms uint, histograms []histogramDistance) { + var i uint + clearHistogramsDistance(histograms, num_histograms) + for i = 0; i < length; i++ { + histogramAddDistance(&histograms[block_ids[i]], uint(data[i])) + } +} + +var clusterBlocksDistance_kInvalidIndex uint32 = math.MaxUint32 + +func clusterBlocksDistance(data []uint16, length uint, num_blocks uint, block_ids []byte, split *blockSplit) { + var histogram_symbols []uint32 = make([]uint32, num_blocks) + var block_lengths []uint32 = make([]uint32, num_blocks) + var expected_num_clusters uint = clustersPerBatch * (num_blocks + histogramsPerBatch - 1) / histogramsPerBatch + var all_histograms_size uint = 0 + var all_histograms_capacity uint = expected_num_clusters + var all_histograms []histogramDistance = make([]histogramDistance, all_histograms_capacity) + var cluster_size_size uint = 0 + var cluster_size_capacity uint = expected_num_clusters + var cluster_size []uint32 = make([]uint32, cluster_size_capacity) + var num_clusters uint = 0 + var histograms []histogramDistance = make([]histogramDistance, brotli_min_size_t(num_blocks, histogramsPerBatch)) + var max_num_pairs uint = histogramsPerBatch * histogramsPerBatch / 2 + var pairs_capacity uint = max_num_pairs + 1 + var pairs []histogramPair = make([]histogramPair, pairs_capacity) + var pos uint = 0 + var clusters []uint32 + var num_final_clusters uint + var new_index []uint32 + var i uint + var sizes = [histogramsPerBatch]uint32{0} + var new_clusters = [histogramsPerBatch]uint32{0} + var symbols = [histogramsPerBatch]uint32{0} + var remap = [histogramsPerBatch]uint32{0} + + for i := 0; i < int(num_blocks); i++ { + block_lengths[i] = 0 + } + { + var block_idx uint = 0 + for i = 0; i < length; i++ { + assert(block_idx < num_blocks) + block_lengths[block_idx]++ + if i+1 == length || block_ids[i] != block_ids[i+1] { + block_idx++ + } + } + + assert(block_idx == num_blocks) + } + + for i = 0; i < num_blocks; i += histogramsPerBatch { + var num_to_combine uint = brotli_min_size_t(num_blocks-i, histogramsPerBatch) + var num_new_clusters uint + var j uint + for j = 0; j < num_to_combine; j++ { + var k uint + histogramClearDistance(&histograms[j]) + for k = 0; uint32(k) < block_lengths[i+j]; k++ { + histogramAddDistance(&histograms[j], uint(data[pos])) + pos++ + } + + histograms[j].bit_cost_ = populationCostDistance(&histograms[j]) + new_clusters[j] = uint32(j) + symbols[j] = uint32(j) + sizes[j] = 1 + } + + num_new_clusters = histogramCombineDistance(histograms, sizes[:], symbols[:], new_clusters[:], []histogramPair(pairs), num_to_combine, num_to_combine, histogramsPerBatch, max_num_pairs) + if all_histograms_capacity < (all_histograms_size + num_new_clusters) { + var _new_size uint + if all_histograms_capacity == 0 { + _new_size = all_histograms_size + num_new_clusters + } else { + _new_size = all_histograms_capacity + } + var new_array []histogramDistance + for _new_size < (all_histograms_size + num_new_clusters) { + _new_size *= 2 + } + new_array = make([]histogramDistance, _new_size) + if all_histograms_capacity != 0 { + copy(new_array, all_histograms[:all_histograms_capacity]) + } + + all_histograms = new_array + all_histograms_capacity = _new_size + } + + brotli_ensure_capacity_uint32_t(&cluster_size, &cluster_size_capacity, cluster_size_size+num_new_clusters) + for j = 0; j < num_new_clusters; j++ { + all_histograms[all_histograms_size] = histograms[new_clusters[j]] + all_histograms_size++ + cluster_size[cluster_size_size] = sizes[new_clusters[j]] + cluster_size_size++ + remap[new_clusters[j]] = uint32(j) + } + + for j = 0; j < num_to_combine; j++ { + histogram_symbols[i+j] = uint32(num_clusters) + remap[symbols[j]] + } + + num_clusters += num_new_clusters + assert(num_clusters == cluster_size_size) + assert(num_clusters == all_histograms_size) + } + + histograms = nil + + max_num_pairs = brotli_min_size_t(64*num_clusters, (num_clusters/2)*num_clusters) + if pairs_capacity < max_num_pairs+1 { + pairs = nil + pairs = make([]histogramPair, (max_num_pairs + 1)) + } + + clusters = make([]uint32, num_clusters) + for i = 0; i < num_clusters; i++ { + clusters[i] = uint32(i) + } + + num_final_clusters = histogramCombineDistance(all_histograms, cluster_size, histogram_symbols, clusters, pairs, num_clusters, num_blocks, maxNumberOfBlockTypes, max_num_pairs) + pairs = nil + cluster_size = nil + + new_index = make([]uint32, num_clusters) + for i = 0; i < num_clusters; i++ { + new_index[i] = clusterBlocksDistance_kInvalidIndex + } + pos = 0 + { + var next_index uint32 = 0 + for i = 0; i < num_blocks; i++ { + var histo histogramDistance + var j uint + var best_out uint32 + var best_bits float64 + histogramClearDistance(&histo) + for j = 0; uint32(j) < block_lengths[i]; j++ { + histogramAddDistance(&histo, uint(data[pos])) + pos++ + } + + if i == 0 { + best_out = histogram_symbols[0] + } else { + best_out = histogram_symbols[i-1] + } + best_bits = histogramBitCostDistanceDistance(&histo, &all_histograms[best_out]) + for j = 0; j < num_final_clusters; j++ { + var cur_bits float64 = histogramBitCostDistanceDistance(&histo, &all_histograms[clusters[j]]) + if cur_bits < best_bits { + best_bits = cur_bits + best_out = clusters[j] + } + } + + histogram_symbols[i] = best_out + if new_index[best_out] == clusterBlocksDistance_kInvalidIndex { + new_index[best_out] = next_index + next_index++ + } + } + } + + clusters = nil + all_histograms = nil + brotli_ensure_capacity_uint8_t(&split.types, &split.types_alloc_size, num_blocks) + brotli_ensure_capacity_uint32_t(&split.lengths, &split.lengths_alloc_size, num_blocks) + { + var cur_length uint32 = 0 + var block_idx uint = 0 + var max_type byte = 0 + for i = 0; i < num_blocks; i++ { + cur_length += block_lengths[i] + if i+1 == num_blocks || histogram_symbols[i] != histogram_symbols[i+1] { + var id byte = byte(new_index[histogram_symbols[i]]) + split.types[block_idx] = id + split.lengths[block_idx] = cur_length + max_type = brotli_max_uint8_t(max_type, id) + cur_length = 0 + block_idx++ + } + } + + split.num_blocks = block_idx + split.num_types = uint(max_type) + 1 + } + + new_index = nil + block_lengths = nil + histogram_symbols = nil +} + +func splitByteVectorDistance(data []uint16, length uint, literals_per_histogram uint, max_histograms uint, sampling_stride_length uint, block_switch_cost float64, params *encoderParams, split *blockSplit) { + var data_size uint = histogramDataSizeDistance() + var num_histograms uint = length/literals_per_histogram + 1 + var histograms []histogramDistance + if num_histograms > max_histograms { + num_histograms = max_histograms + } + + if length == 0 { + split.num_types = 1 + return + } else if length < kMinLengthForBlockSplitting { + brotli_ensure_capacity_uint8_t(&split.types, &split.types_alloc_size, split.num_blocks+1) + brotli_ensure_capacity_uint32_t(&split.lengths, &split.lengths_alloc_size, split.num_blocks+1) + split.num_types = 1 + split.types[split.num_blocks] = 0 + split.lengths[split.num_blocks] = uint32(length) + split.num_blocks++ + return + } + + histograms = make([]histogramDistance, num_histograms) + + /* Find good entropy codes. */ + initialEntropyCodesDistance(data, length, sampling_stride_length, num_histograms, histograms) + + refineEntropyCodesDistance(data, length, sampling_stride_length, num_histograms, histograms) + { + var block_ids []byte = make([]byte, length) + var num_blocks uint = 0 + var bitmaplen uint = (num_histograms + 7) >> 3 + var insert_cost []float64 = make([]float64, (data_size * num_histograms)) + var cost []float64 = make([]float64, num_histograms) + var switch_signal []byte = make([]byte, (length * bitmaplen)) + var new_id []uint16 = make([]uint16, num_histograms) + var iters uint + if params.quality < hqZopflificationQuality { + iters = 3 + } else { + iters = 10 + } + /* Find a good path through literals with the good entropy codes. */ + + var i uint + for i = 0; i < iters; i++ { + num_blocks = findBlocksDistance(data, length, block_switch_cost, num_histograms, histograms, insert_cost, cost, switch_signal, block_ids) + num_histograms = remapBlockIdsDistance(block_ids, length, new_id, num_histograms) + buildBlockHistogramsDistance(data, length, block_ids, num_histograms, histograms) + } + + insert_cost = nil + cost = nil + switch_signal = nil + new_id = nil + histograms = nil + clusterBlocksDistance(data, length, num_blocks, block_ids, split) + block_ids = nil + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/block_splitter_literal.go b/backend/vendor/github.com/andybalholm/brotli/block_splitter_literal.go new file mode 100644 index 0000000..1c895cf --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/block_splitter_literal.go @@ -0,0 +1,433 @@ +package brotli + +import "math" + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +func initialEntropyCodesLiteral(data []byte, length uint, stride uint, num_histograms uint, histograms []histogramLiteral) { + var seed uint32 = 7 + var block_length uint = length / num_histograms + var i uint + clearHistogramsLiteral(histograms, num_histograms) + for i = 0; i < num_histograms; i++ { + var pos uint = length * i / num_histograms + if i != 0 { + pos += uint(myRand(&seed) % uint32(block_length)) + } + + if pos+stride >= length { + pos = length - stride - 1 + } + + histogramAddVectorLiteral(&histograms[i], data[pos:], stride) + } +} + +func randomSampleLiteral(seed *uint32, data []byte, length uint, stride uint, sample *histogramLiteral) { + var pos uint = 0 + if stride >= length { + stride = length + } else { + pos = uint(myRand(seed) % uint32(length-stride+1)) + } + + histogramAddVectorLiteral(sample, data[pos:], stride) +} + +func refineEntropyCodesLiteral(data []byte, length uint, stride uint, num_histograms uint, histograms []histogramLiteral) { + var iters uint = kIterMulForRefining*length/stride + kMinItersForRefining + var seed uint32 = 7 + var iter uint + iters = ((iters + num_histograms - 1) / num_histograms) * num_histograms + for iter = 0; iter < iters; iter++ { + var sample histogramLiteral + histogramClearLiteral(&sample) + randomSampleLiteral(&seed, data, length, stride, &sample) + histogramAddHistogramLiteral(&histograms[iter%num_histograms], &sample) + } +} + +/* Assigns a block id from the range [0, num_histograms) to each data element + in data[0..length) and fills in block_id[0..length) with the assigned values. + Returns the number of blocks, i.e. one plus the number of block switches. */ +func findBlocksLiteral(data []byte, length uint, block_switch_bitcost float64, num_histograms uint, histograms []histogramLiteral, insert_cost []float64, cost []float64, switch_signal []byte, block_id []byte) uint { + var data_size uint = histogramDataSizeLiteral() + var bitmaplen uint = (num_histograms + 7) >> 3 + var num_blocks uint = 1 + var i uint + var j uint + assert(num_histograms <= 256) + if num_histograms <= 1 { + for i = 0; i < length; i++ { + block_id[i] = 0 + } + + return 1 + } + + for i := 0; i < int(data_size*num_histograms); i++ { + insert_cost[i] = 0 + } + for i = 0; i < num_histograms; i++ { + insert_cost[i] = fastLog2(uint(uint32(histograms[i].total_count_))) + } + + for i = data_size; i != 0; { + i-- + for j = 0; j < num_histograms; j++ { + insert_cost[i*num_histograms+j] = insert_cost[j] - bitCost(uint(histograms[j].data_[i])) + } + } + + for i := 0; i < int(num_histograms); i++ { + cost[i] = 0 + } + for i := 0; i < int(length*bitmaplen); i++ { + switch_signal[i] = 0 + } + + /* After each iteration of this loop, cost[k] will contain the difference + between the minimum cost of arriving at the current byte position using + entropy code k, and the minimum cost of arriving at the current byte + position. This difference is capped at the block switch cost, and if it + reaches block switch cost, it means that when we trace back from the last + position, we need to switch here. */ + for i = 0; i < length; i++ { + var byte_ix uint = i + var ix uint = byte_ix * bitmaplen + var insert_cost_ix uint = uint(data[byte_ix]) * num_histograms + var min_cost float64 = 1e99 + var block_switch_cost float64 = block_switch_bitcost + var k uint + for k = 0; k < num_histograms; k++ { + /* We are coding the symbol in data[byte_ix] with entropy code k. */ + cost[k] += insert_cost[insert_cost_ix+k] + + if cost[k] < min_cost { + min_cost = cost[k] + block_id[byte_ix] = byte(k) + } + } + + /* More blocks for the beginning. */ + if byte_ix < 2000 { + block_switch_cost *= 0.77 + 0.07*float64(byte_ix)/2000 + } + + for k = 0; k < num_histograms; k++ { + cost[k] -= min_cost + if cost[k] >= block_switch_cost { + var mask byte = byte(1 << (k & 7)) + cost[k] = block_switch_cost + assert(k>>3 < bitmaplen) + switch_signal[ix+(k>>3)] |= mask + /* Trace back from the last position and switch at the marked places. */ + } + } + } + { + var byte_ix uint = length - 1 + var ix uint = byte_ix * bitmaplen + var cur_id byte = block_id[byte_ix] + for byte_ix > 0 { + var mask byte = byte(1 << (cur_id & 7)) + assert(uint(cur_id)>>3 < bitmaplen) + byte_ix-- + ix -= bitmaplen + if switch_signal[ix+uint(cur_id>>3)]&mask != 0 { + if cur_id != block_id[byte_ix] { + cur_id = block_id[byte_ix] + num_blocks++ + } + } + + block_id[byte_ix] = cur_id + } + } + + return num_blocks +} + +var remapBlockIdsLiteral_kInvalidId uint16 = 256 + +func remapBlockIdsLiteral(block_ids []byte, length uint, new_id []uint16, num_histograms uint) uint { + var next_id uint16 = 0 + var i uint + for i = 0; i < num_histograms; i++ { + new_id[i] = remapBlockIdsLiteral_kInvalidId + } + + for i = 0; i < length; i++ { + assert(uint(block_ids[i]) < num_histograms) + if new_id[block_ids[i]] == remapBlockIdsLiteral_kInvalidId { + new_id[block_ids[i]] = next_id + next_id++ + } + } + + for i = 0; i < length; i++ { + block_ids[i] = byte(new_id[block_ids[i]]) + assert(uint(block_ids[i]) < num_histograms) + } + + assert(uint(next_id) <= num_histograms) + return uint(next_id) +} + +func buildBlockHistogramsLiteral(data []byte, length uint, block_ids []byte, num_histograms uint, histograms []histogramLiteral) { + var i uint + clearHistogramsLiteral(histograms, num_histograms) + for i = 0; i < length; i++ { + histogramAddLiteral(&histograms[block_ids[i]], uint(data[i])) + } +} + +var clusterBlocksLiteral_kInvalidIndex uint32 = math.MaxUint32 + +func clusterBlocksLiteral(data []byte, length uint, num_blocks uint, block_ids []byte, split *blockSplit) { + var histogram_symbols []uint32 = make([]uint32, num_blocks) + var block_lengths []uint32 = make([]uint32, num_blocks) + var expected_num_clusters uint = clustersPerBatch * (num_blocks + histogramsPerBatch - 1) / histogramsPerBatch + var all_histograms_size uint = 0 + var all_histograms_capacity uint = expected_num_clusters + var all_histograms []histogramLiteral = make([]histogramLiteral, all_histograms_capacity) + var cluster_size_size uint = 0 + var cluster_size_capacity uint = expected_num_clusters + var cluster_size []uint32 = make([]uint32, cluster_size_capacity) + var num_clusters uint = 0 + var histograms []histogramLiteral = make([]histogramLiteral, brotli_min_size_t(num_blocks, histogramsPerBatch)) + var max_num_pairs uint = histogramsPerBatch * histogramsPerBatch / 2 + var pairs_capacity uint = max_num_pairs + 1 + var pairs []histogramPair = make([]histogramPair, pairs_capacity) + var pos uint = 0 + var clusters []uint32 + var num_final_clusters uint + var new_index []uint32 + var i uint + var sizes = [histogramsPerBatch]uint32{0} + var new_clusters = [histogramsPerBatch]uint32{0} + var symbols = [histogramsPerBatch]uint32{0} + var remap = [histogramsPerBatch]uint32{0} + + for i := 0; i < int(num_blocks); i++ { + block_lengths[i] = 0 + } + { + var block_idx uint = 0 + for i = 0; i < length; i++ { + assert(block_idx < num_blocks) + block_lengths[block_idx]++ + if i+1 == length || block_ids[i] != block_ids[i+1] { + block_idx++ + } + } + + assert(block_idx == num_blocks) + } + + for i = 0; i < num_blocks; i += histogramsPerBatch { + var num_to_combine uint = brotli_min_size_t(num_blocks-i, histogramsPerBatch) + var num_new_clusters uint + var j uint + for j = 0; j < num_to_combine; j++ { + var k uint + histogramClearLiteral(&histograms[j]) + for k = 0; uint32(k) < block_lengths[i+j]; k++ { + histogramAddLiteral(&histograms[j], uint(data[pos])) + pos++ + } + + histograms[j].bit_cost_ = populationCostLiteral(&histograms[j]) + new_clusters[j] = uint32(j) + symbols[j] = uint32(j) + sizes[j] = 1 + } + + num_new_clusters = histogramCombineLiteral(histograms, sizes[:], symbols[:], new_clusters[:], []histogramPair(pairs), num_to_combine, num_to_combine, histogramsPerBatch, max_num_pairs) + if all_histograms_capacity < (all_histograms_size + num_new_clusters) { + var _new_size uint + if all_histograms_capacity == 0 { + _new_size = all_histograms_size + num_new_clusters + } else { + _new_size = all_histograms_capacity + } + var new_array []histogramLiteral + for _new_size < (all_histograms_size + num_new_clusters) { + _new_size *= 2 + } + new_array = make([]histogramLiteral, _new_size) + if all_histograms_capacity != 0 { + copy(new_array, all_histograms[:all_histograms_capacity]) + } + + all_histograms = new_array + all_histograms_capacity = _new_size + } + + brotli_ensure_capacity_uint32_t(&cluster_size, &cluster_size_capacity, cluster_size_size+num_new_clusters) + for j = 0; j < num_new_clusters; j++ { + all_histograms[all_histograms_size] = histograms[new_clusters[j]] + all_histograms_size++ + cluster_size[cluster_size_size] = sizes[new_clusters[j]] + cluster_size_size++ + remap[new_clusters[j]] = uint32(j) + } + + for j = 0; j < num_to_combine; j++ { + histogram_symbols[i+j] = uint32(num_clusters) + remap[symbols[j]] + } + + num_clusters += num_new_clusters + assert(num_clusters == cluster_size_size) + assert(num_clusters == all_histograms_size) + } + + histograms = nil + + max_num_pairs = brotli_min_size_t(64*num_clusters, (num_clusters/2)*num_clusters) + if pairs_capacity < max_num_pairs+1 { + pairs = nil + pairs = make([]histogramPair, (max_num_pairs + 1)) + } + + clusters = make([]uint32, num_clusters) + for i = 0; i < num_clusters; i++ { + clusters[i] = uint32(i) + } + + num_final_clusters = histogramCombineLiteral(all_histograms, cluster_size, histogram_symbols, clusters, pairs, num_clusters, num_blocks, maxNumberOfBlockTypes, max_num_pairs) + pairs = nil + cluster_size = nil + + new_index = make([]uint32, num_clusters) + for i = 0; i < num_clusters; i++ { + new_index[i] = clusterBlocksLiteral_kInvalidIndex + } + pos = 0 + { + var next_index uint32 = 0 + for i = 0; i < num_blocks; i++ { + var histo histogramLiteral + var j uint + var best_out uint32 + var best_bits float64 + histogramClearLiteral(&histo) + for j = 0; uint32(j) < block_lengths[i]; j++ { + histogramAddLiteral(&histo, uint(data[pos])) + pos++ + } + + if i == 0 { + best_out = histogram_symbols[0] + } else { + best_out = histogram_symbols[i-1] + } + best_bits = histogramBitCostDistanceLiteral(&histo, &all_histograms[best_out]) + for j = 0; j < num_final_clusters; j++ { + var cur_bits float64 = histogramBitCostDistanceLiteral(&histo, &all_histograms[clusters[j]]) + if cur_bits < best_bits { + best_bits = cur_bits + best_out = clusters[j] + } + } + + histogram_symbols[i] = best_out + if new_index[best_out] == clusterBlocksLiteral_kInvalidIndex { + new_index[best_out] = next_index + next_index++ + } + } + } + + clusters = nil + all_histograms = nil + brotli_ensure_capacity_uint8_t(&split.types, &split.types_alloc_size, num_blocks) + brotli_ensure_capacity_uint32_t(&split.lengths, &split.lengths_alloc_size, num_blocks) + { + var cur_length uint32 = 0 + var block_idx uint = 0 + var max_type byte = 0 + for i = 0; i < num_blocks; i++ { + cur_length += block_lengths[i] + if i+1 == num_blocks || histogram_symbols[i] != histogram_symbols[i+1] { + var id byte = byte(new_index[histogram_symbols[i]]) + split.types[block_idx] = id + split.lengths[block_idx] = cur_length + max_type = brotli_max_uint8_t(max_type, id) + cur_length = 0 + block_idx++ + } + } + + split.num_blocks = block_idx + split.num_types = uint(max_type) + 1 + } + + new_index = nil + block_lengths = nil + histogram_symbols = nil +} + +func splitByteVectorLiteral(data []byte, length uint, literals_per_histogram uint, max_histograms uint, sampling_stride_length uint, block_switch_cost float64, params *encoderParams, split *blockSplit) { + var data_size uint = histogramDataSizeLiteral() + var num_histograms uint = length/literals_per_histogram + 1 + var histograms []histogramLiteral + if num_histograms > max_histograms { + num_histograms = max_histograms + } + + if length == 0 { + split.num_types = 1 + return + } else if length < kMinLengthForBlockSplitting { + brotli_ensure_capacity_uint8_t(&split.types, &split.types_alloc_size, split.num_blocks+1) + brotli_ensure_capacity_uint32_t(&split.lengths, &split.lengths_alloc_size, split.num_blocks+1) + split.num_types = 1 + split.types[split.num_blocks] = 0 + split.lengths[split.num_blocks] = uint32(length) + split.num_blocks++ + return + } + + histograms = make([]histogramLiteral, num_histograms) + + /* Find good entropy codes. */ + initialEntropyCodesLiteral(data, length, sampling_stride_length, num_histograms, histograms) + + refineEntropyCodesLiteral(data, length, sampling_stride_length, num_histograms, histograms) + { + var block_ids []byte = make([]byte, length) + var num_blocks uint = 0 + var bitmaplen uint = (num_histograms + 7) >> 3 + var insert_cost []float64 = make([]float64, (data_size * num_histograms)) + var cost []float64 = make([]float64, num_histograms) + var switch_signal []byte = make([]byte, (length * bitmaplen)) + var new_id []uint16 = make([]uint16, num_histograms) + var iters uint + if params.quality < hqZopflificationQuality { + iters = 3 + } else { + iters = 10 + } + /* Find a good path through literals with the good entropy codes. */ + + var i uint + for i = 0; i < iters; i++ { + num_blocks = findBlocksLiteral(data, length, block_switch_cost, num_histograms, histograms, insert_cost, cost, switch_signal, block_ids) + num_histograms = remapBlockIdsLiteral(block_ids, length, new_id, num_histograms) + buildBlockHistogramsLiteral(data, length, block_ids, num_histograms, histograms) + } + + insert_cost = nil + cost = nil + switch_signal = nil + new_id = nil + histograms = nil + clusterBlocksLiteral(data, length, num_blocks, block_ids, split) + block_ids = nil + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/brotli_bit_stream.go b/backend/vendor/github.com/andybalholm/brotli/brotli_bit_stream.go new file mode 100644 index 0000000..ee65529 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/brotli_bit_stream.go @@ -0,0 +1,1539 @@ +package brotli + +import ( + "math" + "sync" +) + +const maxHuffmanTreeSize = (2*numCommandSymbols + 1) + +/* +The maximum size of Huffman dictionary for distances assuming that + + NPOSTFIX = 0 and NDIRECT = 0. +*/ +const maxSimpleDistanceAlphabetSize = 140 + +/* +Represents the range of values belonging to a prefix code: + + [offset, offset + 2^nbits) +*/ +type prefixCodeRange struct { + offset uint32 + nbits uint32 +} + +var kBlockLengthPrefixCode = [numBlockLenSymbols]prefixCodeRange{ + prefixCodeRange{1, 2}, + prefixCodeRange{5, 2}, + prefixCodeRange{9, 2}, + prefixCodeRange{13, 2}, + prefixCodeRange{17, 3}, + prefixCodeRange{25, 3}, + prefixCodeRange{33, 3}, + prefixCodeRange{41, 3}, + prefixCodeRange{49, 4}, + prefixCodeRange{65, 4}, + prefixCodeRange{81, 4}, + prefixCodeRange{97, 4}, + prefixCodeRange{113, 5}, + prefixCodeRange{145, 5}, + prefixCodeRange{177, 5}, + prefixCodeRange{209, 5}, + prefixCodeRange{241, 6}, + prefixCodeRange{305, 6}, + prefixCodeRange{369, 7}, + prefixCodeRange{497, 8}, + prefixCodeRange{753, 9}, + prefixCodeRange{1265, 10}, + prefixCodeRange{2289, 11}, + prefixCodeRange{4337, 12}, + prefixCodeRange{8433, 13}, + prefixCodeRange{16625, 24}, +} + +func blockLengthPrefixCode(len uint32) uint32 { + var code uint32 + if len >= 177 { + if len >= 753 { + code = 20 + } else { + code = 14 + } + } else if len >= 41 { + code = 7 + } else { + code = 0 + } + for code < (numBlockLenSymbols-1) && len >= kBlockLengthPrefixCode[code+1].offset { + code++ + } + return code +} + +func getBlockLengthPrefixCode(len uint32, code *uint, n_extra *uint32, extra *uint32) { + *code = uint(blockLengthPrefixCode(uint32(len))) + *n_extra = kBlockLengthPrefixCode[*code].nbits + *extra = len - kBlockLengthPrefixCode[*code].offset +} + +type blockTypeCodeCalculator struct { + last_type uint + second_last_type uint +} + +func initBlockTypeCodeCalculator(self *blockTypeCodeCalculator) { + self.last_type = 1 + self.second_last_type = 0 +} + +func nextBlockTypeCode(calculator *blockTypeCodeCalculator, type_ byte) uint { + var type_code uint + if uint(type_) == calculator.last_type+1 { + type_code = 1 + } else if uint(type_) == calculator.second_last_type { + type_code = 0 + } else { + type_code = uint(type_) + 2 + } + calculator.second_last_type = calculator.last_type + calculator.last_type = uint(type_) + return type_code +} + +/* +|nibblesbits| represents the 2 bits to encode MNIBBLES (0-3) + + REQUIRES: length > 0 + REQUIRES: length <= (1 << 24) +*/ +func encodeMlen(length uint, bits *uint64, numbits *uint, nibblesbits *uint64) { + var lg uint + if length == 1 { + lg = 1 + } else { + lg = uint(log2FloorNonZero(uint(uint32(length-1)))) + 1 + } + var tmp uint + if lg < 16 { + tmp = 16 + } else { + tmp = (lg + 3) + } + var mnibbles uint = tmp / 4 + assert(length > 0) + assert(length <= 1<<24) + assert(lg <= 24) + *nibblesbits = uint64(mnibbles) - 4 + *numbits = mnibbles * 4 + *bits = uint64(length) - 1 +} + +func storeCommandExtra(cmd *command, storage_ix *uint, storage []byte) { + var copylen_code uint32 = commandCopyLenCode(cmd) + var inscode uint16 = getInsertLengthCode(uint(cmd.insert_len_)) + var copycode uint16 = getCopyLengthCode(uint(copylen_code)) + var insnumextra uint32 = getInsertExtra(inscode) + var insextraval uint64 = uint64(cmd.insert_len_) - uint64(getInsertBase(inscode)) + var copyextraval uint64 = uint64(copylen_code) - uint64(getCopyBase(copycode)) + var bits uint64 = copyextraval< 0 + REQUIRES: length <= (1 << 24) +*/ +func storeCompressedMetaBlockHeader(is_final_block bool, length uint, storage_ix *uint, storage []byte) { + var lenbits uint64 + var nlenbits uint + var nibblesbits uint64 + var is_final uint64 + if is_final_block { + is_final = 1 + } else { + is_final = 0 + } + + /* Write ISLAST bit. */ + writeBits(1, is_final, storage_ix, storage) + + /* Write ISEMPTY bit. */ + if is_final_block { + writeBits(1, 0, storage_ix, storage) + } + + encodeMlen(length, &lenbits, &nlenbits, &nibblesbits) + writeBits(2, nibblesbits, storage_ix, storage) + writeBits(nlenbits, lenbits, storage_ix, storage) + + if !is_final_block { + /* Write ISUNCOMPRESSED bit. */ + writeBits(1, 0, storage_ix, storage) + } +} + +/* +Stores the uncompressed meta-block header. + + REQUIRES: length > 0 + REQUIRES: length <= (1 << 24) +*/ +func storeUncompressedMetaBlockHeader(length uint, storage_ix *uint, storage []byte) { + var lenbits uint64 + var nlenbits uint + var nibblesbits uint64 + + /* Write ISLAST bit. + Uncompressed block cannot be the last one, so set to 0. */ + writeBits(1, 0, storage_ix, storage) + + encodeMlen(length, &lenbits, &nlenbits, &nibblesbits) + writeBits(2, nibblesbits, storage_ix, storage) + writeBits(nlenbits, lenbits, storage_ix, storage) + + /* Write ISUNCOMPRESSED bit. */ + writeBits(1, 1, storage_ix, storage) +} + +var storeHuffmanTreeOfHuffmanTreeToBitMask_kStorageOrder = [codeLengthCodes]byte{1, 2, 3, 4, 0, 5, 17, 6, 16, 7, 8, 9, 10, 11, 12, 13, 14, 15} + +var storeHuffmanTreeOfHuffmanTreeToBitMask_kHuffmanBitLengthHuffmanCodeSymbols = [6]byte{0, 7, 3, 2, 1, 15} +var storeHuffmanTreeOfHuffmanTreeToBitMask_kHuffmanBitLengthHuffmanCodeBitLengths = [6]byte{2, 4, 3, 2, 2, 4} + +func storeHuffmanTreeOfHuffmanTreeToBitMask(num_codes int, code_length_bitdepth []byte, storage_ix *uint, storage []byte) { + var skip_some uint = 0 + var codes_to_store uint = codeLengthCodes + /* The bit lengths of the Huffman code over the code length alphabet + are compressed with the following static Huffman code: + Symbol Code + ------ ---- + 0 00 + 1 1110 + 2 110 + 3 01 + 4 10 + 5 1111 */ + + /* Throw away trailing zeros: */ + if num_codes > 1 { + for ; codes_to_store > 0; codes_to_store-- { + if code_length_bitdepth[storeHuffmanTreeOfHuffmanTreeToBitMask_kStorageOrder[codes_to_store-1]] != 0 { + break + } + } + } + + if code_length_bitdepth[storeHuffmanTreeOfHuffmanTreeToBitMask_kStorageOrder[0]] == 0 && code_length_bitdepth[storeHuffmanTreeOfHuffmanTreeToBitMask_kStorageOrder[1]] == 0 { + skip_some = 2 /* skips two. */ + if code_length_bitdepth[storeHuffmanTreeOfHuffmanTreeToBitMask_kStorageOrder[2]] == 0 { + skip_some = 3 /* skips three. */ + } + } + + writeBits(2, uint64(skip_some), storage_ix, storage) + { + var i uint + for i = skip_some; i < codes_to_store; i++ { + var l uint = uint(code_length_bitdepth[storeHuffmanTreeOfHuffmanTreeToBitMask_kStorageOrder[i]]) + writeBits(uint(storeHuffmanTreeOfHuffmanTreeToBitMask_kHuffmanBitLengthHuffmanCodeBitLengths[l]), uint64(storeHuffmanTreeOfHuffmanTreeToBitMask_kHuffmanBitLengthHuffmanCodeSymbols[l]), storage_ix, storage) + } + } +} + +func storeHuffmanTreeToBitMask(huffman_tree_size uint, huffman_tree []byte, huffman_tree_extra_bits []byte, code_length_bitdepth []byte, code_length_bitdepth_symbols []uint16, storage_ix *uint, storage []byte) { + var i uint + for i = 0; i < huffman_tree_size; i++ { + var ix uint = uint(huffman_tree[i]) + writeBits(uint(code_length_bitdepth[ix]), uint64(code_length_bitdepth_symbols[ix]), storage_ix, storage) + + /* Extra bits */ + switch ix { + case repeatPreviousCodeLength: + writeBits(2, uint64(huffman_tree_extra_bits[i]), storage_ix, storage) + + case repeatZeroCodeLength: + writeBits(3, uint64(huffman_tree_extra_bits[i]), storage_ix, storage) + } + } +} + +func storeSimpleHuffmanTree(depths []byte, symbols []uint, num_symbols uint, max_bits uint, storage_ix *uint, storage []byte) { + /* value of 1 indicates a simple Huffman code */ + writeBits(2, 1, storage_ix, storage) + + writeBits(2, uint64(num_symbols)-1, storage_ix, storage) /* NSYM - 1 */ + { + /* Sort */ + var i uint + for i = 0; i < num_symbols; i++ { + var j uint + for j = i + 1; j < num_symbols; j++ { + if depths[symbols[j]] < depths[symbols[i]] { + var tmp uint = symbols[j] + symbols[j] = symbols[i] + symbols[i] = tmp + } + } + } + } + + if num_symbols == 2 { + writeBits(max_bits, uint64(symbols[0]), storage_ix, storage) + writeBits(max_bits, uint64(symbols[1]), storage_ix, storage) + } else if num_symbols == 3 { + writeBits(max_bits, uint64(symbols[0]), storage_ix, storage) + writeBits(max_bits, uint64(symbols[1]), storage_ix, storage) + writeBits(max_bits, uint64(symbols[2]), storage_ix, storage) + } else { + writeBits(max_bits, uint64(symbols[0]), storage_ix, storage) + writeBits(max_bits, uint64(symbols[1]), storage_ix, storage) + writeBits(max_bits, uint64(symbols[2]), storage_ix, storage) + writeBits(max_bits, uint64(symbols[3]), storage_ix, storage) + + /* tree-select */ + var tmp int + if depths[symbols[0]] == 1 { + tmp = 1 + } else { + tmp = 0 + } + writeBits(1, uint64(tmp), storage_ix, storage) + } +} + +/* +num = alphabet size + + depths = symbol depths +*/ +func storeHuffmanTree(depths []byte, num uint, tree []huffmanTree, storage_ix *uint, storage []byte) { + var huffman_tree [numCommandSymbols]byte + var huffman_tree_extra_bits [numCommandSymbols]byte + var huffman_tree_size uint = 0 + var code_length_bitdepth = [codeLengthCodes]byte{0} + var code_length_bitdepth_symbols [codeLengthCodes]uint16 + var huffman_tree_histogram = [codeLengthCodes]uint32{0} + var i uint + var num_codes int = 0 + /* Write the Huffman tree into the brotli-representation. + The command alphabet is the largest, so this allocation will fit all + alphabets. */ + + var code uint = 0 + + assert(num <= numCommandSymbols) + + writeHuffmanTree(depths, num, &huffman_tree_size, huffman_tree[:], huffman_tree_extra_bits[:]) + + /* Calculate the statistics of the Huffman tree in brotli-representation. */ + for i = 0; i < huffman_tree_size; i++ { + huffman_tree_histogram[huffman_tree[i]]++ + } + + for i = 0; i < codeLengthCodes; i++ { + if huffman_tree_histogram[i] != 0 { + if num_codes == 0 { + code = i + num_codes = 1 + } else if num_codes == 1 { + num_codes = 2 + break + } + } + } + + /* Calculate another Huffman tree to use for compressing both the + earlier Huffman tree with. */ + createHuffmanTree(huffman_tree_histogram[:], codeLengthCodes, 5, tree, code_length_bitdepth[:]) + + convertBitDepthsToSymbols(code_length_bitdepth[:], codeLengthCodes, code_length_bitdepth_symbols[:]) + + /* Now, we have all the data, let's start storing it */ + storeHuffmanTreeOfHuffmanTreeToBitMask(num_codes, code_length_bitdepth[:], storage_ix, storage) + + if num_codes == 1 { + code_length_bitdepth[code] = 0 + } + + /* Store the real Huffman tree now. */ + storeHuffmanTreeToBitMask(huffman_tree_size, huffman_tree[:], huffman_tree_extra_bits[:], code_length_bitdepth[:], code_length_bitdepth_symbols[:], storage_ix, storage) +} + +/* +Builds a Huffman tree from histogram[0:length] into depth[0:length] and + + bits[0:length] and stores the encoded tree to the bit stream. +*/ +func buildAndStoreHuffmanTree(histogram []uint32, histogram_length uint, alphabet_size uint, tree []huffmanTree, depth []byte, bits []uint16, storage_ix *uint, storage []byte) { + var count uint = 0 + var s4 = [4]uint{0} + var i uint + var max_bits uint = 0 + for i = 0; i < histogram_length; i++ { + if histogram[i] != 0 { + if count < 4 { + s4[count] = i + } else if count > 4 { + break + } + + count++ + } + } + { + var max_bits_counter uint = alphabet_size - 1 + for max_bits_counter != 0 { + max_bits_counter >>= 1 + max_bits++ + } + } + + if count <= 1 { + writeBits(4, 1, storage_ix, storage) + writeBits(max_bits, uint64(s4[0]), storage_ix, storage) + depth[s4[0]] = 0 + bits[s4[0]] = 0 + return + } + + for i := 0; i < int(histogram_length); i++ { + depth[i] = 0 + } + createHuffmanTree(histogram, histogram_length, 15, tree, depth) + convertBitDepthsToSymbols(depth, histogram_length, bits) + + if count <= 4 { + storeSimpleHuffmanTree(depth, s4[:], count, max_bits, storage_ix, storage) + } else { + storeHuffmanTree(depth, histogram_length, tree, storage_ix, storage) + } +} + +func sortHuffmanTree1(v0 huffmanTree, v1 huffmanTree) bool { + return v0.total_count_ < v1.total_count_ +} + +var huffmanTreePool sync.Pool + +func buildAndStoreHuffmanTreeFast(histogram []uint32, histogram_total uint, max_bits uint, depth []byte, bits []uint16, storage_ix *uint, storage []byte) { + var count uint = 0 + var symbols = [4]uint{0} + var length uint = 0 + var total uint = histogram_total + for total != 0 { + if histogram[length] != 0 { + if count < 4 { + symbols[count] = length + } + + count++ + total -= uint(histogram[length]) + } + + length++ + } + + if count <= 1 { + writeBits(4, 1, storage_ix, storage) + writeBits(max_bits, uint64(symbols[0]), storage_ix, storage) + depth[symbols[0]] = 0 + bits[symbols[0]] = 0 + return + } + + for i := 0; i < int(length); i++ { + depth[i] = 0 + } + { + var max_tree_size uint = 2*length + 1 + tree, _ := huffmanTreePool.Get().(*[]huffmanTree) + if tree == nil || cap(*tree) < int(max_tree_size) { + tmp := make([]huffmanTree, max_tree_size) + tree = &tmp + } else { + *tree = (*tree)[:max_tree_size] + } + var count_limit uint32 + for count_limit = 1; ; count_limit *= 2 { + var node int = 0 + var l uint + for l = length; l != 0; { + l-- + if histogram[l] != 0 { + if histogram[l] >= count_limit { + initHuffmanTree(&(*tree)[node:][0], histogram[l], -1, int16(l)) + } else { + initHuffmanTree(&(*tree)[node:][0], count_limit, -1, int16(l)) + } + + node++ + } + } + { + var n int = node + /* Points to the next leaf node. */ /* Points to the next non-leaf node. */ + var sentinel huffmanTree + var i int = 0 + var j int = n + 1 + var k int + + sortHuffmanTreeItems(*tree, uint(n), huffmanTreeComparator(sortHuffmanTree1)) + + /* The nodes are: + [0, n): the sorted leaf nodes that we start with. + [n]: we add a sentinel here. + [n + 1, 2n): new parent nodes are added here, starting from + (n+1). These are naturally in ascending order. + [2n]: we add a sentinel at the end as well. + There will be (2n+1) elements at the end. */ + initHuffmanTree(&sentinel, math.MaxUint32, -1, -1) + + (*tree)[node] = sentinel + node++ + (*tree)[node] = sentinel + node++ + + for k = n - 1; k > 0; k-- { + var left int + var right int + if (*tree)[i].total_count_ <= (*tree)[j].total_count_ { + left = i + i++ + } else { + left = j + j++ + } + + if (*tree)[i].total_count_ <= (*tree)[j].total_count_ { + right = i + i++ + } else { + right = j + j++ + } + + /* The sentinel node becomes the parent node. */ + (*tree)[node-1].total_count_ = (*tree)[left].total_count_ + (*tree)[right].total_count_ + + (*tree)[node-1].index_left_ = int16(left) + (*tree)[node-1].index_right_or_value_ = int16(right) + + /* Add back the last sentinel node. */ + (*tree)[node] = sentinel + node++ + } + + if setDepth(2*n-1, *tree, depth, 14) { + /* We need to pack the Huffman tree in 14 bits. If this was not + successful, add fake entities to the lowest values and retry. */ + break + } + } + } + + huffmanTreePool.Put(tree) + } + + convertBitDepthsToSymbols(depth, length, bits) + if count <= 4 { + var i uint + + /* value of 1 indicates a simple Huffman code */ + writeBits(2, 1, storage_ix, storage) + + writeBits(2, uint64(count)-1, storage_ix, storage) /* NSYM - 1 */ + + /* Sort */ + for i = 0; i < count; i++ { + var j uint + for j = i + 1; j < count; j++ { + if depth[symbols[j]] < depth[symbols[i]] { + var tmp uint = symbols[j] + symbols[j] = symbols[i] + symbols[i] = tmp + } + } + } + + if count == 2 { + writeBits(max_bits, uint64(symbols[0]), storage_ix, storage) + writeBits(max_bits, uint64(symbols[1]), storage_ix, storage) + } else if count == 3 { + writeBits(max_bits, uint64(symbols[0]), storage_ix, storage) + writeBits(max_bits, uint64(symbols[1]), storage_ix, storage) + writeBits(max_bits, uint64(symbols[2]), storage_ix, storage) + } else { + writeBits(max_bits, uint64(symbols[0]), storage_ix, storage) + writeBits(max_bits, uint64(symbols[1]), storage_ix, storage) + writeBits(max_bits, uint64(symbols[2]), storage_ix, storage) + writeBits(max_bits, uint64(symbols[3]), storage_ix, storage) + + /* tree-select */ + var tmp int + if depth[symbols[0]] == 1 { + tmp = 1 + } else { + tmp = 0 + } + writeBits(1, uint64(tmp), storage_ix, storage) + } + } else { + var previous_value byte = 8 + var i uint + + /* Complex Huffman Tree */ + storeStaticCodeLengthCode(storage_ix, storage) + + /* Actual RLE coding. */ + for i = 0; i < length; { + var value byte = depth[i] + var reps uint = 1 + var k uint + for k = i + 1; k < length && depth[k] == value; k++ { + reps++ + } + + i += reps + if value == 0 { + writeBits(uint(kZeroRepsDepth[reps]), kZeroRepsBits[reps], storage_ix, storage) + } else { + if previous_value != value { + writeBits(uint(kCodeLengthDepth[value]), uint64(kCodeLengthBits[value]), storage_ix, storage) + reps-- + } + + if reps < 3 { + for reps != 0 { + reps-- + writeBits(uint(kCodeLengthDepth[value]), uint64(kCodeLengthBits[value]), storage_ix, storage) + } + } else { + reps -= 3 + writeBits(uint(kNonZeroRepsDepth[reps]), kNonZeroRepsBits[reps], storage_ix, storage) + } + + previous_value = value + } + } + } +} + +func buildAndStoreHuffmanTreeFastBW(histogram []uint32, histogram_total uint, max_bits uint, depth []byte, bits []uint16, bw *bitWriter) { + var count uint = 0 + var symbols = [4]uint{0} + var length uint = 0 + var total uint = histogram_total + for total != 0 { + if histogram[length] != 0 { + if count < 4 { + symbols[count] = length + } + + count++ + total -= uint(histogram[length]) + } + + length++ + } + + if count <= 1 { + bw.writeBits(4, 1) + bw.writeBits(max_bits, uint64(symbols[0])) + depth[symbols[0]] = 0 + bits[symbols[0]] = 0 + return + } + + for i := 0; i < int(length); i++ { + depth[i] = 0 + } + { + var max_tree_size uint = 2*length + 1 + tree, _ := huffmanTreePool.Get().(*[]huffmanTree) + if tree == nil || cap(*tree) < int(max_tree_size) { + tmp := make([]huffmanTree, max_tree_size) + tree = &tmp + } else { + *tree = (*tree)[:max_tree_size] + } + var count_limit uint32 + for count_limit = 1; ; count_limit *= 2 { + var node int = 0 + var l uint + for l = length; l != 0; { + l-- + if histogram[l] != 0 { + if histogram[l] >= count_limit { + initHuffmanTree(&(*tree)[node:][0], histogram[l], -1, int16(l)) + } else { + initHuffmanTree(&(*tree)[node:][0], count_limit, -1, int16(l)) + } + + node++ + } + } + { + var n int = node + /* Points to the next leaf node. */ /* Points to the next non-leaf node. */ + var sentinel huffmanTree + var i int = 0 + var j int = n + 1 + var k int + + sortHuffmanTreeItems(*tree, uint(n), huffmanTreeComparator(sortHuffmanTree1)) + + /* The nodes are: + [0, n): the sorted leaf nodes that we start with. + [n]: we add a sentinel here. + [n + 1, 2n): new parent nodes are added here, starting from + (n+1). These are naturally in ascending order. + [2n]: we add a sentinel at the end as well. + There will be (2n+1) elements at the end. */ + initHuffmanTree(&sentinel, math.MaxUint32, -1, -1) + + (*tree)[node] = sentinel + node++ + (*tree)[node] = sentinel + node++ + + for k = n - 1; k > 0; k-- { + var left int + var right int + if (*tree)[i].total_count_ <= (*tree)[j].total_count_ { + left = i + i++ + } else { + left = j + j++ + } + + if (*tree)[i].total_count_ <= (*tree)[j].total_count_ { + right = i + i++ + } else { + right = j + j++ + } + + /* The sentinel node becomes the parent node. */ + (*tree)[node-1].total_count_ = (*tree)[left].total_count_ + (*tree)[right].total_count_ + + (*tree)[node-1].index_left_ = int16(left) + (*tree)[node-1].index_right_or_value_ = int16(right) + + /* Add back the last sentinel node. */ + (*tree)[node] = sentinel + node++ + } + + if setDepth(2*n-1, *tree, depth, 14) { + /* We need to pack the Huffman tree in 14 bits. If this was not + successful, add fake entities to the lowest values and retry. */ + break + } + } + } + + huffmanTreePool.Put(tree) + } + + convertBitDepthsToSymbols(depth, length, bits) + if count <= 4 { + var i uint + + /* value of 1 indicates a simple Huffman code */ + bw.writeBits(2, 1) + + bw.writeBits(2, uint64(count)-1) /* NSYM - 1 */ + + /* Sort */ + for i = 0; i < count; i++ { + var j uint + for j = i + 1; j < count; j++ { + if depth[symbols[j]] < depth[symbols[i]] { + var tmp uint = symbols[j] + symbols[j] = symbols[i] + symbols[i] = tmp + } + } + } + + if count == 2 { + bw.writeBits(max_bits, uint64(symbols[0])) + bw.writeBits(max_bits, uint64(symbols[1])) + } else if count == 3 { + bw.writeBits(max_bits, uint64(symbols[0])) + bw.writeBits(max_bits, uint64(symbols[1])) + bw.writeBits(max_bits, uint64(symbols[2])) + } else { + bw.writeBits(max_bits, uint64(symbols[0])) + bw.writeBits(max_bits, uint64(symbols[1])) + bw.writeBits(max_bits, uint64(symbols[2])) + bw.writeBits(max_bits, uint64(symbols[3])) + + /* tree-select */ + bw.writeSingleBit(depth[symbols[0]] == 1) + } + } else { + var previous_value byte = 8 + var i uint + + /* Complex Huffman Tree */ + storeStaticCodeLengthCodeBW(bw) + + /* Actual RLE coding. */ + for i = 0; i < length; { + var value byte = depth[i] + var reps uint = 1 + var k uint + for k = i + 1; k < length && depth[k] == value; k++ { + reps++ + } + + i += reps + if value == 0 { + bw.writeBits(uint(kZeroRepsDepth[reps]), kZeroRepsBits[reps]) + } else { + if previous_value != value { + bw.writeBits(uint(kCodeLengthDepth[value]), uint64(kCodeLengthBits[value])) + reps-- + } + + if reps < 3 { + for reps != 0 { + reps-- + bw.writeBits(uint(kCodeLengthDepth[value]), uint64(kCodeLengthBits[value])) + } + } else { + reps -= 3 + bw.writeBits(uint(kNonZeroRepsDepth[reps]), kNonZeroRepsBits[reps]) + } + + previous_value = value + } + } + } +} + +func indexOf(v []byte, v_size uint, value byte) uint { + var i uint = 0 + for ; i < v_size; i++ { + if v[i] == value { + return i + } + } + + return i +} + +func moveToFront(v []byte, index uint) { + var value byte = v[index] + var i uint + for i = index; i != 0; i-- { + v[i] = v[i-1] + } + + v[0] = value +} + +func moveToFrontTransform(v_in []uint32, v_size uint, v_out []uint32) { + var i uint + var mtf [256]byte + var max_value uint32 + if v_size == 0 { + return + } + + max_value = v_in[0] + for i = 1; i < v_size; i++ { + if v_in[i] > max_value { + max_value = v_in[i] + } + } + + assert(max_value < 256) + for i = 0; uint32(i) <= max_value; i++ { + mtf[i] = byte(i) + } + { + var mtf_size uint = uint(max_value + 1) + for i = 0; i < v_size; i++ { + var index uint = indexOf(mtf[:], mtf_size, byte(v_in[i])) + assert(index < mtf_size) + v_out[i] = uint32(index) + moveToFront(mtf[:], index) + } + } +} + +/* +Finds runs of zeros in v[0..in_size) and replaces them with a prefix code of + + the run length plus extra bits (lower 9 bits is the prefix code and the rest + are the extra bits). Non-zero values in v[] are shifted by + *max_length_prefix. Will not create prefix codes bigger than the initial + value of *max_run_length_prefix. The prefix code of run length L is simply + Log2Floor(L) and the number of extra bits is the same as the prefix code. +*/ +func runLengthCodeZeros(in_size uint, v []uint32, out_size *uint, max_run_length_prefix *uint32) { + var max_reps uint32 = 0 + var i uint + var max_prefix uint32 + for i = 0; i < in_size; { + var reps uint32 = 0 + for ; i < in_size && v[i] != 0; i++ { + } + for ; i < in_size && v[i] == 0; i++ { + reps++ + } + + max_reps = brotli_max_uint32_t(reps, max_reps) + } + + if max_reps > 0 { + max_prefix = log2FloorNonZero(uint(max_reps)) + } else { + max_prefix = 0 + } + max_prefix = brotli_min_uint32_t(max_prefix, *max_run_length_prefix) + *max_run_length_prefix = max_prefix + *out_size = 0 + for i = 0; i < in_size; { + assert(*out_size <= i) + if v[i] != 0 { + v[*out_size] = v[i] + *max_run_length_prefix + i++ + (*out_size)++ + } else { + var reps uint32 = 1 + var k uint + for k = i + 1; k < in_size && v[k] == 0; k++ { + reps++ + } + + i += uint(reps) + for reps != 0 { + if reps < 2< 0) + writeSingleBit(use_rle, storage_ix, storage) + if use_rle { + writeBits(4, uint64(max_run_length_prefix)-1, storage_ix, storage) + } + } + + buildAndStoreHuffmanTree(histogram[:], uint(uint32(num_clusters)+max_run_length_prefix), uint(uint32(num_clusters)+max_run_length_prefix), tree, depths[:], bits[:], storage_ix, storage) + for i = 0; i < num_rle_symbols; i++ { + var rle_symbol uint32 = rle_symbols[i] & encodeContextMap_kSymbolMask + var extra_bits_val uint32 = rle_symbols[i] >> symbolBits + writeBits(uint(depths[rle_symbol]), uint64(bits[rle_symbol]), storage_ix, storage) + if rle_symbol > 0 && rle_symbol <= max_run_length_prefix { + writeBits(uint(rle_symbol), uint64(extra_bits_val), storage_ix, storage) + } + } + + writeBits(1, 1, storage_ix, storage) /* use move-to-front */ + rle_symbols = nil +} + +/* Stores the block switch command with index block_ix to the bit stream. */ +func storeBlockSwitch(code *blockSplitCode, block_len uint32, block_type byte, is_first_block bool, storage_ix *uint, storage []byte) { + var typecode uint = nextBlockTypeCode(&code.type_code_calculator, block_type) + var lencode uint + var len_nextra uint32 + var len_extra uint32 + if !is_first_block { + writeBits(uint(code.type_depths[typecode]), uint64(code.type_bits[typecode]), storage_ix, storage) + } + + getBlockLengthPrefixCode(block_len, &lencode, &len_nextra, &len_extra) + + writeBits(uint(code.length_depths[lencode]), uint64(code.length_bits[lencode]), storage_ix, storage) + writeBits(uint(len_nextra), uint64(len_extra), storage_ix, storage) +} + +/* +Builds a BlockSplitCode data structure from the block split given by the + + vector of block types and block lengths and stores it to the bit stream. +*/ +func buildAndStoreBlockSplitCode(types []byte, lengths []uint32, num_blocks uint, num_types uint, tree []huffmanTree, code *blockSplitCode, storage_ix *uint, storage []byte) { + var type_histo [maxBlockTypeSymbols]uint32 + var length_histo [numBlockLenSymbols]uint32 + var i uint + var type_code_calculator blockTypeCodeCalculator + for i := 0; i < int(num_types+2); i++ { + type_histo[i] = 0 + } + length_histo = [numBlockLenSymbols]uint32{} + initBlockTypeCodeCalculator(&type_code_calculator) + for i = 0; i < num_blocks; i++ { + var type_code uint = nextBlockTypeCode(&type_code_calculator, types[i]) + if i != 0 { + type_histo[type_code]++ + } + length_histo[blockLengthPrefixCode(lengths[i])]++ + } + + storeVarLenUint8(num_types-1, storage_ix, storage) + if num_types > 1 { /* TODO: else? could StoreBlockSwitch occur? */ + buildAndStoreHuffmanTree(type_histo[0:], num_types+2, num_types+2, tree, code.type_depths[0:], code.type_bits[0:], storage_ix, storage) + buildAndStoreHuffmanTree(length_histo[0:], numBlockLenSymbols, numBlockLenSymbols, tree, code.length_depths[0:], code.length_bits[0:], storage_ix, storage) + storeBlockSwitch(code, lengths[0], types[0], true, storage_ix, storage) + } +} + +/* Stores a context map where the histogram type is always the block type. */ +func storeTrivialContextMap(num_types uint, context_bits uint, tree []huffmanTree, storage_ix *uint, storage []byte) { + storeVarLenUint8(num_types-1, storage_ix, storage) + if num_types > 1 { + var repeat_code uint = context_bits - 1 + var repeat_bits uint = (1 << repeat_code) - 1 + var alphabet_size uint = num_types + repeat_code + var histogram [maxContextMapSymbols]uint32 + var depths [maxContextMapSymbols]byte + var bits [maxContextMapSymbols]uint16 + var i uint + for i := 0; i < int(alphabet_size); i++ { + histogram[i] = 0 + } + + /* Write RLEMAX. */ + writeBits(1, 1, storage_ix, storage) + + writeBits(4, uint64(repeat_code)-1, storage_ix, storage) + histogram[repeat_code] = uint32(num_types) + histogram[0] = 1 + for i = context_bits; i < alphabet_size; i++ { + histogram[i] = 1 + } + + buildAndStoreHuffmanTree(histogram[:], alphabet_size, alphabet_size, tree, depths[:], bits[:], storage_ix, storage) + for i = 0; i < num_types; i++ { + var tmp uint + if i == 0 { + tmp = 0 + } else { + tmp = i + context_bits - 1 + } + var code uint = tmp + writeBits(uint(depths[code]), uint64(bits[code]), storage_ix, storage) + writeBits(uint(depths[repeat_code]), uint64(bits[repeat_code]), storage_ix, storage) + writeBits(repeat_code, uint64(repeat_bits), storage_ix, storage) + } + + /* Write IMTF (inverse-move-to-front) bit. */ + writeBits(1, 1, storage_ix, storage) + } +} + +/* Manages the encoding of one block category (literal, command or distance). */ +type blockEncoder struct { + histogram_length_ uint + num_block_types_ uint + block_types_ []byte + block_lengths_ []uint32 + num_blocks_ uint + block_split_code_ blockSplitCode + block_ix_ uint + block_len_ uint + entropy_ix_ uint + depths_ []byte + bits_ []uint16 +} + +var blockEncoderPool sync.Pool + +func getBlockEncoder(histogram_length uint, num_block_types uint, block_types []byte, block_lengths []uint32, num_blocks uint) *blockEncoder { + self, _ := blockEncoderPool.Get().(*blockEncoder) + + if self != nil { + self.block_ix_ = 0 + self.entropy_ix_ = 0 + self.depths_ = self.depths_[:0] + self.bits_ = self.bits_[:0] + } else { + self = &blockEncoder{} + } + + self.histogram_length_ = histogram_length + self.num_block_types_ = num_block_types + self.block_types_ = block_types + self.block_lengths_ = block_lengths + self.num_blocks_ = num_blocks + initBlockTypeCodeCalculator(&self.block_split_code_.type_code_calculator) + if num_blocks == 0 { + self.block_len_ = 0 + } else { + self.block_len_ = uint(block_lengths[0]) + } + + return self +} + +func cleanupBlockEncoder(self *blockEncoder) { + blockEncoderPool.Put(self) +} + +/* +Creates entropy codes of block lengths and block types and stores them + + to the bit stream. +*/ +func buildAndStoreBlockSwitchEntropyCodes(self *blockEncoder, tree []huffmanTree, storage_ix *uint, storage []byte) { + buildAndStoreBlockSplitCode(self.block_types_, self.block_lengths_, self.num_blocks_, self.num_block_types_, tree, &self.block_split_code_, storage_ix, storage) +} + +/* +Stores the next symbol with the entropy code of the current block type. + + Updates the block type and block length at block boundaries. +*/ +func storeSymbol(self *blockEncoder, symbol uint, storage_ix *uint, storage []byte) { + if self.block_len_ == 0 { + self.block_ix_++ + var block_ix uint = self.block_ix_ + var block_len uint32 = self.block_lengths_[block_ix] + var block_type byte = self.block_types_[block_ix] + self.block_len_ = uint(block_len) + self.entropy_ix_ = uint(block_type) * self.histogram_length_ + storeBlockSwitch(&self.block_split_code_, block_len, block_type, false, storage_ix, storage) + } + + self.block_len_-- + { + var ix uint = self.entropy_ix_ + symbol + writeBits(uint(self.depths_[ix]), uint64(self.bits_[ix]), storage_ix, storage) + } +} + +/* +Stores the next symbol with the entropy code of the current block type and + + context value. + Updates the block type and block length at block boundaries. +*/ +func storeSymbolWithContext(self *blockEncoder, symbol uint, context uint, context_map []uint32, storage_ix *uint, storage []byte, context_bits uint) { + if self.block_len_ == 0 { + self.block_ix_++ + var block_ix uint = self.block_ix_ + var block_len uint32 = self.block_lengths_[block_ix] + var block_type byte = self.block_types_[block_ix] + self.block_len_ = uint(block_len) + self.entropy_ix_ = uint(block_type) << context_bits + storeBlockSwitch(&self.block_split_code_, block_len, block_type, false, storage_ix, storage) + } + + self.block_len_-- + { + var histo_ix uint = uint(context_map[self.entropy_ix_+context]) + var ix uint = histo_ix*self.histogram_length_ + symbol + writeBits(uint(self.depths_[ix]), uint64(self.bits_[ix]), storage_ix, storage) + } +} + +func buildAndStoreEntropyCodesLiteral(self *blockEncoder, histograms []histogramLiteral, histograms_size uint, alphabet_size uint, tree []huffmanTree, storage_ix *uint, storage []byte) { + var table_size uint = histograms_size * self.histogram_length_ + if cap(self.depths_) < int(table_size) { + self.depths_ = make([]byte, table_size) + } else { + self.depths_ = self.depths_[:table_size] + } + if cap(self.bits_) < int(table_size) { + self.bits_ = make([]uint16, table_size) + } else { + self.bits_ = self.bits_[:table_size] + } + { + var i uint + for i = 0; i < histograms_size; i++ { + var ix uint = i * self.histogram_length_ + buildAndStoreHuffmanTree(histograms[i].data_[0:], self.histogram_length_, alphabet_size, tree, self.depths_[ix:], self.bits_[ix:], storage_ix, storage) + } + } +} + +func buildAndStoreEntropyCodesCommand(self *blockEncoder, histograms []histogramCommand, histograms_size uint, alphabet_size uint, tree []huffmanTree, storage_ix *uint, storage []byte) { + var table_size uint = histograms_size * self.histogram_length_ + if cap(self.depths_) < int(table_size) { + self.depths_ = make([]byte, table_size) + } else { + self.depths_ = self.depths_[:table_size] + } + if cap(self.bits_) < int(table_size) { + self.bits_ = make([]uint16, table_size) + } else { + self.bits_ = self.bits_[:table_size] + } + { + var i uint + for i = 0; i < histograms_size; i++ { + var ix uint = i * self.histogram_length_ + buildAndStoreHuffmanTree(histograms[i].data_[0:], self.histogram_length_, alphabet_size, tree, self.depths_[ix:], self.bits_[ix:], storage_ix, storage) + } + } +} + +func buildAndStoreEntropyCodesDistance(self *blockEncoder, histograms []histogramDistance, histograms_size uint, alphabet_size uint, tree []huffmanTree, storage_ix *uint, storage []byte) { + var table_size uint = histograms_size * self.histogram_length_ + if cap(self.depths_) < int(table_size) { + self.depths_ = make([]byte, table_size) + } else { + self.depths_ = self.depths_[:table_size] + } + if cap(self.bits_) < int(table_size) { + self.bits_ = make([]uint16, table_size) + } else { + self.bits_ = self.bits_[:table_size] + } + { + var i uint + for i = 0; i < histograms_size; i++ { + var ix uint = i * self.histogram_length_ + buildAndStoreHuffmanTree(histograms[i].data_[0:], self.histogram_length_, alphabet_size, tree, self.depths_[ix:], self.bits_[ix:], storage_ix, storage) + } + } +} + +func jumpToByteBoundary(storage_ix *uint, storage []byte) { + *storage_ix = (*storage_ix + 7) &^ 7 + storage[*storage_ix>>3] = 0 +} + +func storeMetaBlock(input []byte, start_pos uint, length uint, mask uint, prev_byte byte, prev_byte2 byte, is_last bool, params *encoderParams, literal_context_mode int, commands []command, mb *metaBlockSplit, storage_ix *uint, storage []byte) { + var pos uint = start_pos + var i uint + var num_distance_symbols uint32 = params.dist.alphabet_size + var num_effective_distance_symbols uint32 = num_distance_symbols + var tree []huffmanTree + var literal_context_lut contextLUT = getContextLUT(literal_context_mode) + var dist *distanceParams = ¶ms.dist + if params.large_window && num_effective_distance_symbols > numHistogramDistanceSymbols { + num_effective_distance_symbols = numHistogramDistanceSymbols + } + + storeCompressedMetaBlockHeader(is_last, length, storage_ix, storage) + + tree = make([]huffmanTree, maxHuffmanTreeSize) + literal_enc := getBlockEncoder(numLiteralSymbols, mb.literal_split.num_types, mb.literal_split.types, mb.literal_split.lengths, mb.literal_split.num_blocks) + command_enc := getBlockEncoder(numCommandSymbols, mb.command_split.num_types, mb.command_split.types, mb.command_split.lengths, mb.command_split.num_blocks) + distance_enc := getBlockEncoder(uint(num_effective_distance_symbols), mb.distance_split.num_types, mb.distance_split.types, mb.distance_split.lengths, mb.distance_split.num_blocks) + + buildAndStoreBlockSwitchEntropyCodes(literal_enc, tree, storage_ix, storage) + buildAndStoreBlockSwitchEntropyCodes(command_enc, tree, storage_ix, storage) + buildAndStoreBlockSwitchEntropyCodes(distance_enc, tree, storage_ix, storage) + + writeBits(2, uint64(dist.distance_postfix_bits), storage_ix, storage) + writeBits(4, uint64(dist.num_direct_distance_codes)>>dist.distance_postfix_bits, storage_ix, storage) + for i = 0; i < mb.literal_split.num_types; i++ { + writeBits(2, uint64(literal_context_mode), storage_ix, storage) + } + + if mb.literal_context_map_size == 0 { + storeTrivialContextMap(mb.literal_histograms_size, literalContextBits, tree, storage_ix, storage) + } else { + encodeContextMap(mb.literal_context_map, mb.literal_context_map_size, mb.literal_histograms_size, tree, storage_ix, storage) + } + + if mb.distance_context_map_size == 0 { + storeTrivialContextMap(mb.distance_histograms_size, distanceContextBits, tree, storage_ix, storage) + } else { + encodeContextMap(mb.distance_context_map, mb.distance_context_map_size, mb.distance_histograms_size, tree, storage_ix, storage) + } + + buildAndStoreEntropyCodesLiteral(literal_enc, mb.literal_histograms, mb.literal_histograms_size, numLiteralSymbols, tree, storage_ix, storage) + buildAndStoreEntropyCodesCommand(command_enc, mb.command_histograms, mb.command_histograms_size, numCommandSymbols, tree, storage_ix, storage) + buildAndStoreEntropyCodesDistance(distance_enc, mb.distance_histograms, mb.distance_histograms_size, uint(num_distance_symbols), tree, storage_ix, storage) + tree = nil + + for _, cmd := range commands { + var cmd_code uint = uint(cmd.cmd_prefix_) + storeSymbol(command_enc, cmd_code, storage_ix, storage) + storeCommandExtra(&cmd, storage_ix, storage) + if mb.literal_context_map_size == 0 { + var j uint + for j = uint(cmd.insert_len_); j != 0; j-- { + storeSymbol(literal_enc, uint(input[pos&mask]), storage_ix, storage) + pos++ + } + } else { + var j uint + for j = uint(cmd.insert_len_); j != 0; j-- { + var context uint = uint(getContext(prev_byte, prev_byte2, literal_context_lut)) + var literal byte = input[pos&mask] + storeSymbolWithContext(literal_enc, uint(literal), context, mb.literal_context_map, storage_ix, storage, literalContextBits) + prev_byte2 = prev_byte + prev_byte = literal + pos++ + } + } + + pos += uint(commandCopyLen(&cmd)) + if commandCopyLen(&cmd) != 0 { + prev_byte2 = input[(pos-2)&mask] + prev_byte = input[(pos-1)&mask] + if cmd.cmd_prefix_ >= 128 { + var dist_code uint = uint(cmd.dist_prefix_) & 0x3FF + var distnumextra uint32 = uint32(cmd.dist_prefix_) >> 10 + var distextra uint64 = uint64(cmd.dist_extra_) + if mb.distance_context_map_size == 0 { + storeSymbol(distance_enc, dist_code, storage_ix, storage) + } else { + var context uint = uint(commandDistanceContext(&cmd)) + storeSymbolWithContext(distance_enc, dist_code, context, mb.distance_context_map, storage_ix, storage, distanceContextBits) + } + + writeBits(uint(distnumextra), distextra, storage_ix, storage) + } + } + } + + cleanupBlockEncoder(distance_enc) + cleanupBlockEncoder(command_enc) + cleanupBlockEncoder(literal_enc) + if is_last { + jumpToByteBoundary(storage_ix, storage) + } +} + +func buildHistograms(input []byte, start_pos uint, mask uint, commands []command, lit_histo *histogramLiteral, cmd_histo *histogramCommand, dist_histo *histogramDistance) { + var pos uint = start_pos + for _, cmd := range commands { + var j uint + histogramAddCommand(cmd_histo, uint(cmd.cmd_prefix_)) + for j = uint(cmd.insert_len_); j != 0; j-- { + histogramAddLiteral(lit_histo, uint(input[pos&mask])) + pos++ + } + + pos += uint(commandCopyLen(&cmd)) + if commandCopyLen(&cmd) != 0 && cmd.cmd_prefix_ >= 128 { + histogramAddDistance(dist_histo, uint(cmd.dist_prefix_)&0x3FF) + } + } +} + +func storeDataWithHuffmanCodes(input []byte, start_pos uint, mask uint, commands []command, lit_depth []byte, lit_bits []uint16, cmd_depth []byte, cmd_bits []uint16, dist_depth []byte, dist_bits []uint16, storage_ix *uint, storage []byte) { + var pos uint = start_pos + for _, cmd := range commands { + var cmd_code uint = uint(cmd.cmd_prefix_) + var j uint + writeBits(uint(cmd_depth[cmd_code]), uint64(cmd_bits[cmd_code]), storage_ix, storage) + storeCommandExtra(&cmd, storage_ix, storage) + for j = uint(cmd.insert_len_); j != 0; j-- { + var literal byte = input[pos&mask] + writeBits(uint(lit_depth[literal]), uint64(lit_bits[literal]), storage_ix, storage) + pos++ + } + + pos += uint(commandCopyLen(&cmd)) + if commandCopyLen(&cmd) != 0 && cmd.cmd_prefix_ >= 128 { + var dist_code uint = uint(cmd.dist_prefix_) & 0x3FF + var distnumextra uint32 = uint32(cmd.dist_prefix_) >> 10 + var distextra uint32 = cmd.dist_extra_ + writeBits(uint(dist_depth[dist_code]), uint64(dist_bits[dist_code]), storage_ix, storage) + writeBits(uint(distnumextra), uint64(distextra), storage_ix, storage) + } + } +} + +func storeMetaBlockTrivial(input []byte, start_pos uint, length uint, mask uint, is_last bool, params *encoderParams, commands []command, storage_ix *uint, storage []byte) { + var lit_histo histogramLiteral + var cmd_histo histogramCommand + var dist_histo histogramDistance + var lit_depth [numLiteralSymbols]byte + var lit_bits [numLiteralSymbols]uint16 + var cmd_depth [numCommandSymbols]byte + var cmd_bits [numCommandSymbols]uint16 + var dist_depth [maxSimpleDistanceAlphabetSize]byte + var dist_bits [maxSimpleDistanceAlphabetSize]uint16 + var tree []huffmanTree + var num_distance_symbols uint32 = params.dist.alphabet_size + + storeCompressedMetaBlockHeader(is_last, length, storage_ix, storage) + + histogramClearLiteral(&lit_histo) + histogramClearCommand(&cmd_histo) + histogramClearDistance(&dist_histo) + + buildHistograms(input, start_pos, mask, commands, &lit_histo, &cmd_histo, &dist_histo) + + writeBits(13, 0, storage_ix, storage) + + tree = make([]huffmanTree, maxHuffmanTreeSize) + buildAndStoreHuffmanTree(lit_histo.data_[:], numLiteralSymbols, numLiteralSymbols, tree, lit_depth[:], lit_bits[:], storage_ix, storage) + buildAndStoreHuffmanTree(cmd_histo.data_[:], numCommandSymbols, numCommandSymbols, tree, cmd_depth[:], cmd_bits[:], storage_ix, storage) + buildAndStoreHuffmanTree(dist_histo.data_[:], maxSimpleDistanceAlphabetSize, uint(num_distance_symbols), tree, dist_depth[:], dist_bits[:], storage_ix, storage) + tree = nil + storeDataWithHuffmanCodes(input, start_pos, mask, commands, lit_depth[:], lit_bits[:], cmd_depth[:], cmd_bits[:], dist_depth[:], dist_bits[:], storage_ix, storage) + if is_last { + jumpToByteBoundary(storage_ix, storage) + } +} + +func storeMetaBlockFast(input []byte, start_pos uint, length uint, mask uint, is_last bool, params *encoderParams, commands []command, storage_ix *uint, storage []byte) { + var num_distance_symbols uint32 = params.dist.alphabet_size + var distance_alphabet_bits uint32 = log2FloorNonZero(uint(num_distance_symbols-1)) + 1 + + storeCompressedMetaBlockHeader(is_last, length, storage_ix, storage) + + writeBits(13, 0, storage_ix, storage) + + if len(commands) <= 128 { + var histogram = [numLiteralSymbols]uint32{0} + var pos uint = start_pos + var num_literals uint = 0 + var lit_depth [numLiteralSymbols]byte + var lit_bits [numLiteralSymbols]uint16 + for _, cmd := range commands { + var j uint + for j = uint(cmd.insert_len_); j != 0; j-- { + histogram[input[pos&mask]]++ + pos++ + } + + num_literals += uint(cmd.insert_len_) + pos += uint(commandCopyLen(&cmd)) + } + + buildAndStoreHuffmanTreeFast(histogram[:], num_literals, /* max_bits = */ + 8, lit_depth[:], lit_bits[:], storage_ix, storage) + + storeStaticCommandHuffmanTree(storage_ix, storage) + storeStaticDistanceHuffmanTree(storage_ix, storage) + storeDataWithHuffmanCodes(input, start_pos, mask, commands, lit_depth[:], lit_bits[:], kStaticCommandCodeDepth[:], kStaticCommandCodeBits[:], kStaticDistanceCodeDepth[:], kStaticDistanceCodeBits[:], storage_ix, storage) + } else { + var lit_histo histogramLiteral + var cmd_histo histogramCommand + var dist_histo histogramDistance + var lit_depth [numLiteralSymbols]byte + var lit_bits [numLiteralSymbols]uint16 + var cmd_depth [numCommandSymbols]byte + var cmd_bits [numCommandSymbols]uint16 + var dist_depth [maxSimpleDistanceAlphabetSize]byte + var dist_bits [maxSimpleDistanceAlphabetSize]uint16 + histogramClearLiteral(&lit_histo) + histogramClearCommand(&cmd_histo) + histogramClearDistance(&dist_histo) + buildHistograms(input, start_pos, mask, commands, &lit_histo, &cmd_histo, &dist_histo) + buildAndStoreHuffmanTreeFast(lit_histo.data_[:], lit_histo.total_count_, /* max_bits = */ + 8, lit_depth[:], lit_bits[:], storage_ix, storage) + + buildAndStoreHuffmanTreeFast(cmd_histo.data_[:], cmd_histo.total_count_, /* max_bits = */ + 10, cmd_depth[:], cmd_bits[:], storage_ix, storage) + + buildAndStoreHuffmanTreeFast(dist_histo.data_[:], dist_histo.total_count_, /* max_bits = */ + uint(distance_alphabet_bits), dist_depth[:], dist_bits[:], storage_ix, storage) + + storeDataWithHuffmanCodes(input, start_pos, mask, commands, lit_depth[:], lit_bits[:], cmd_depth[:], cmd_bits[:], dist_depth[:], dist_bits[:], storage_ix, storage) + } + + if is_last { + jumpToByteBoundary(storage_ix, storage) + } +} + +/* +This is for storing uncompressed blocks (simple raw storage of + + bytes-as-bytes). +*/ +func storeUncompressedMetaBlock(is_final_block bool, input []byte, position uint, mask uint, len uint, storage_ix *uint, storage []byte) { + var masked_pos uint = position & mask + storeUncompressedMetaBlockHeader(uint(len), storage_ix, storage) + jumpToByteBoundary(storage_ix, storage) + + if masked_pos+len > mask+1 { + var len1 uint = mask + 1 - masked_pos + copy(storage[*storage_ix>>3:], input[masked_pos:][:len1]) + *storage_ix += len1 << 3 + len -= len1 + masked_pos = 0 + } + + copy(storage[*storage_ix>>3:], input[masked_pos:][:len]) + *storage_ix += uint(len << 3) + + /* We need to clear the next 4 bytes to continue to be + compatible with BrotliWriteBits. */ + writeBitsPrepareStorage(*storage_ix, storage) + + /* Since the uncompressed block itself may not be the final block, add an + empty one after this. */ + if is_final_block { + writeBits(1, 1, storage_ix, storage) /* islast */ + writeBits(1, 1, storage_ix, storage) /* isempty */ + jumpToByteBoundary(storage_ix, storage) + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/cluster.go b/backend/vendor/github.com/andybalholm/brotli/cluster.go new file mode 100644 index 0000000..df8a328 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/cluster.go @@ -0,0 +1,30 @@ +package brotli + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Functions for clustering similar histograms together. */ + +type histogramPair struct { + idx1 uint32 + idx2 uint32 + cost_combo float64 + cost_diff float64 +} + +func histogramPairIsLess(p1 *histogramPair, p2 *histogramPair) bool { + if p1.cost_diff != p2.cost_diff { + return p1.cost_diff > p2.cost_diff + } + + return (p1.idx2 - p1.idx1) > (p2.idx2 - p2.idx1) +} + +/* Returns entropy reduction of the context map when we combine two clusters. */ +func clusterCostDiff(size_a uint, size_b uint) float64 { + var size_c uint = size_a + size_b + return float64(size_a)*fastLog2(size_a) + float64(size_b)*fastLog2(size_b) - float64(size_c)*fastLog2(size_c) +} diff --git a/backend/vendor/github.com/andybalholm/brotli/cluster_command.go b/backend/vendor/github.com/andybalholm/brotli/cluster_command.go new file mode 100644 index 0000000..45b569b --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/cluster_command.go @@ -0,0 +1,164 @@ +package brotli + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Computes the bit cost reduction by combining out[idx1] and out[idx2] and if + it is below a threshold, stores the pair (idx1, idx2) in the *pairs queue. */ +func compareAndPushToQueueCommand(out []histogramCommand, cluster_size []uint32, idx1 uint32, idx2 uint32, max_num_pairs uint, pairs []histogramPair, num_pairs *uint) { + var is_good_pair bool = false + var p histogramPair + p.idx2 = 0 + p.idx1 = p.idx2 + p.cost_combo = 0 + p.cost_diff = p.cost_combo + if idx1 == idx2 { + return + } + + if idx2 < idx1 { + var t uint32 = idx2 + idx2 = idx1 + idx1 = t + } + + p.idx1 = idx1 + p.idx2 = idx2 + p.cost_diff = 0.5 * clusterCostDiff(uint(cluster_size[idx1]), uint(cluster_size[idx2])) + p.cost_diff -= out[idx1].bit_cost_ + p.cost_diff -= out[idx2].bit_cost_ + + if out[idx1].total_count_ == 0 { + p.cost_combo = out[idx2].bit_cost_ + is_good_pair = true + } else if out[idx2].total_count_ == 0 { + p.cost_combo = out[idx1].bit_cost_ + is_good_pair = true + } else { + var threshold float64 + if *num_pairs == 0 { + threshold = 1e99 + } else { + threshold = brotli_max_double(0.0, pairs[0].cost_diff) + } + var combo histogramCommand = out[idx1] + var cost_combo float64 + histogramAddHistogramCommand(&combo, &out[idx2]) + cost_combo = populationCostCommand(&combo) + if cost_combo < threshold-p.cost_diff { + p.cost_combo = cost_combo + is_good_pair = true + } + } + + if is_good_pair { + p.cost_diff += p.cost_combo + if *num_pairs > 0 && histogramPairIsLess(&pairs[0], &p) { + /* Replace the top of the queue if needed. */ + if *num_pairs < max_num_pairs { + pairs[*num_pairs] = pairs[0] + (*num_pairs)++ + } + + pairs[0] = p + } else if *num_pairs < max_num_pairs { + pairs[*num_pairs] = p + (*num_pairs)++ + } + } +} + +func histogramCombineCommand(out []histogramCommand, cluster_size []uint32, symbols []uint32, clusters []uint32, pairs []histogramPair, num_clusters uint, symbols_size uint, max_clusters uint, max_num_pairs uint) uint { + var cost_diff_threshold float64 = 0.0 + var min_cluster_size uint = 1 + var num_pairs uint = 0 + { + /* We maintain a vector of histogram pairs, with the property that the pair + with the maximum bit cost reduction is the first. */ + var idx1 uint + for idx1 = 0; idx1 < num_clusters; idx1++ { + var idx2 uint + for idx2 = idx1 + 1; idx2 < num_clusters; idx2++ { + compareAndPushToQueueCommand(out, cluster_size, clusters[idx1], clusters[idx2], max_num_pairs, pairs[0:], &num_pairs) + } + } + } + + for num_clusters > min_cluster_size { + var best_idx1 uint32 + var best_idx2 uint32 + var i uint + if pairs[0].cost_diff >= cost_diff_threshold { + cost_diff_threshold = 1e99 + min_cluster_size = max_clusters + continue + } + + /* Take the best pair from the top of heap. */ + best_idx1 = pairs[0].idx1 + + best_idx2 = pairs[0].idx2 + histogramAddHistogramCommand(&out[best_idx1], &out[best_idx2]) + out[best_idx1].bit_cost_ = pairs[0].cost_combo + cluster_size[best_idx1] += cluster_size[best_idx2] + for i = 0; i < symbols_size; i++ { + if symbols[i] == best_idx2 { + symbols[i] = best_idx1 + } + } + + for i = 0; i < num_clusters; i++ { + if clusters[i] == best_idx2 { + copy(clusters[i:], clusters[i+1:][:num_clusters-i-1]) + break + } + } + + num_clusters-- + { + /* Remove pairs intersecting the just combined best pair. */ + var copy_to_idx uint = 0 + for i = 0; i < num_pairs; i++ { + var p *histogramPair = &pairs[i] + if p.idx1 == best_idx1 || p.idx2 == best_idx1 || p.idx1 == best_idx2 || p.idx2 == best_idx2 { + /* Remove invalid pair from the queue. */ + continue + } + + if histogramPairIsLess(&pairs[0], p) { + /* Replace the top of the queue if needed. */ + var front histogramPair = pairs[0] + pairs[0] = *p + pairs[copy_to_idx] = front + } else { + pairs[copy_to_idx] = *p + } + + copy_to_idx++ + } + + num_pairs = copy_to_idx + } + + /* Push new pairs formed with the combined histogram to the heap. */ + for i = 0; i < num_clusters; i++ { + compareAndPushToQueueCommand(out, cluster_size, best_idx1, clusters[i], max_num_pairs, pairs[0:], &num_pairs) + } + } + + return num_clusters +} + +/* What is the bit cost of moving histogram from cur_symbol to candidate. */ +func histogramBitCostDistanceCommand(histogram *histogramCommand, candidate *histogramCommand) float64 { + if histogram.total_count_ == 0 { + return 0.0 + } else { + var tmp histogramCommand = *histogram + histogramAddHistogramCommand(&tmp, candidate) + return populationCostCommand(&tmp) - candidate.bit_cost_ + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/cluster_distance.go b/backend/vendor/github.com/andybalholm/brotli/cluster_distance.go new file mode 100644 index 0000000..1aaa86e --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/cluster_distance.go @@ -0,0 +1,326 @@ +package brotli + +import "math" + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Computes the bit cost reduction by combining out[idx1] and out[idx2] and if + it is below a threshold, stores the pair (idx1, idx2) in the *pairs queue. */ +func compareAndPushToQueueDistance(out []histogramDistance, cluster_size []uint32, idx1 uint32, idx2 uint32, max_num_pairs uint, pairs []histogramPair, num_pairs *uint) { + var is_good_pair bool = false + var p histogramPair + p.idx2 = 0 + p.idx1 = p.idx2 + p.cost_combo = 0 + p.cost_diff = p.cost_combo + if idx1 == idx2 { + return + } + + if idx2 < idx1 { + var t uint32 = idx2 + idx2 = idx1 + idx1 = t + } + + p.idx1 = idx1 + p.idx2 = idx2 + p.cost_diff = 0.5 * clusterCostDiff(uint(cluster_size[idx1]), uint(cluster_size[idx2])) + p.cost_diff -= out[idx1].bit_cost_ + p.cost_diff -= out[idx2].bit_cost_ + + if out[idx1].total_count_ == 0 { + p.cost_combo = out[idx2].bit_cost_ + is_good_pair = true + } else if out[idx2].total_count_ == 0 { + p.cost_combo = out[idx1].bit_cost_ + is_good_pair = true + } else { + var threshold float64 + if *num_pairs == 0 { + threshold = 1e99 + } else { + threshold = brotli_max_double(0.0, pairs[0].cost_diff) + } + var combo histogramDistance = out[idx1] + var cost_combo float64 + histogramAddHistogramDistance(&combo, &out[idx2]) + cost_combo = populationCostDistance(&combo) + if cost_combo < threshold-p.cost_diff { + p.cost_combo = cost_combo + is_good_pair = true + } + } + + if is_good_pair { + p.cost_diff += p.cost_combo + if *num_pairs > 0 && histogramPairIsLess(&pairs[0], &p) { + /* Replace the top of the queue if needed. */ + if *num_pairs < max_num_pairs { + pairs[*num_pairs] = pairs[0] + (*num_pairs)++ + } + + pairs[0] = p + } else if *num_pairs < max_num_pairs { + pairs[*num_pairs] = p + (*num_pairs)++ + } + } +} + +func histogramCombineDistance(out []histogramDistance, cluster_size []uint32, symbols []uint32, clusters []uint32, pairs []histogramPair, num_clusters uint, symbols_size uint, max_clusters uint, max_num_pairs uint) uint { + var cost_diff_threshold float64 = 0.0 + var min_cluster_size uint = 1 + var num_pairs uint = 0 + { + /* We maintain a vector of histogram pairs, with the property that the pair + with the maximum bit cost reduction is the first. */ + var idx1 uint + for idx1 = 0; idx1 < num_clusters; idx1++ { + var idx2 uint + for idx2 = idx1 + 1; idx2 < num_clusters; idx2++ { + compareAndPushToQueueDistance(out, cluster_size, clusters[idx1], clusters[idx2], max_num_pairs, pairs[0:], &num_pairs) + } + } + } + + for num_clusters > min_cluster_size { + var best_idx1 uint32 + var best_idx2 uint32 + var i uint + if pairs[0].cost_diff >= cost_diff_threshold { + cost_diff_threshold = 1e99 + min_cluster_size = max_clusters + continue + } + + /* Take the best pair from the top of heap. */ + best_idx1 = pairs[0].idx1 + + best_idx2 = pairs[0].idx2 + histogramAddHistogramDistance(&out[best_idx1], &out[best_idx2]) + out[best_idx1].bit_cost_ = pairs[0].cost_combo + cluster_size[best_idx1] += cluster_size[best_idx2] + for i = 0; i < symbols_size; i++ { + if symbols[i] == best_idx2 { + symbols[i] = best_idx1 + } + } + + for i = 0; i < num_clusters; i++ { + if clusters[i] == best_idx2 { + copy(clusters[i:], clusters[i+1:][:num_clusters-i-1]) + break + } + } + + num_clusters-- + { + /* Remove pairs intersecting the just combined best pair. */ + var copy_to_idx uint = 0 + for i = 0; i < num_pairs; i++ { + var p *histogramPair = &pairs[i] + if p.idx1 == best_idx1 || p.idx2 == best_idx1 || p.idx1 == best_idx2 || p.idx2 == best_idx2 { + /* Remove invalid pair from the queue. */ + continue + } + + if histogramPairIsLess(&pairs[0], p) { + /* Replace the top of the queue if needed. */ + var front histogramPair = pairs[0] + pairs[0] = *p + pairs[copy_to_idx] = front + } else { + pairs[copy_to_idx] = *p + } + + copy_to_idx++ + } + + num_pairs = copy_to_idx + } + + /* Push new pairs formed with the combined histogram to the heap. */ + for i = 0; i < num_clusters; i++ { + compareAndPushToQueueDistance(out, cluster_size, best_idx1, clusters[i], max_num_pairs, pairs[0:], &num_pairs) + } + } + + return num_clusters +} + +/* What is the bit cost of moving histogram from cur_symbol to candidate. */ +func histogramBitCostDistanceDistance(histogram *histogramDistance, candidate *histogramDistance) float64 { + if histogram.total_count_ == 0 { + return 0.0 + } else { + var tmp histogramDistance = *histogram + histogramAddHistogramDistance(&tmp, candidate) + return populationCostDistance(&tmp) - candidate.bit_cost_ + } +} + +/* Find the best 'out' histogram for each of the 'in' histograms. + When called, clusters[0..num_clusters) contains the unique values from + symbols[0..in_size), but this property is not preserved in this function. + Note: we assume that out[]->bit_cost_ is already up-to-date. */ +func histogramRemapDistance(in []histogramDistance, in_size uint, clusters []uint32, num_clusters uint, out []histogramDistance, symbols []uint32) { + var i uint + for i = 0; i < in_size; i++ { + var best_out uint32 + if i == 0 { + best_out = symbols[0] + } else { + best_out = symbols[i-1] + } + var best_bits float64 = histogramBitCostDistanceDistance(&in[i], &out[best_out]) + var j uint + for j = 0; j < num_clusters; j++ { + var cur_bits float64 = histogramBitCostDistanceDistance(&in[i], &out[clusters[j]]) + if cur_bits < best_bits { + best_bits = cur_bits + best_out = clusters[j] + } + } + + symbols[i] = best_out + } + + /* Recompute each out based on raw and symbols. */ + for i = 0; i < num_clusters; i++ { + histogramClearDistance(&out[clusters[i]]) + } + + for i = 0; i < in_size; i++ { + histogramAddHistogramDistance(&out[symbols[i]], &in[i]) + } +} + +/* Reorders elements of the out[0..length) array and changes values in + symbols[0..length) array in the following way: + * when called, symbols[] contains indexes into out[], and has N unique + values (possibly N < length) + * on return, symbols'[i] = f(symbols[i]) and + out'[symbols'[i]] = out[symbols[i]], for each 0 <= i < length, + where f is a bijection between the range of symbols[] and [0..N), and + the first occurrences of values in symbols'[i] come in consecutive + increasing order. + Returns N, the number of unique values in symbols[]. */ + +var histogramReindexDistance_kInvalidIndex uint32 = math.MaxUint32 + +func histogramReindexDistance(out []histogramDistance, symbols []uint32, length uint) uint { + var new_index []uint32 = make([]uint32, length) + var next_index uint32 + var tmp []histogramDistance + var i uint + for i = 0; i < length; i++ { + new_index[i] = histogramReindexDistance_kInvalidIndex + } + + next_index = 0 + for i = 0; i < length; i++ { + if new_index[symbols[i]] == histogramReindexDistance_kInvalidIndex { + new_index[symbols[i]] = next_index + next_index++ + } + } + + /* TODO: by using idea of "cycle-sort" we can avoid allocation of + tmp and reduce the number of copying by the factor of 2. */ + tmp = make([]histogramDistance, next_index) + + next_index = 0 + for i = 0; i < length; i++ { + if new_index[symbols[i]] == next_index { + tmp[next_index] = out[symbols[i]] + next_index++ + } + + symbols[i] = new_index[symbols[i]] + } + + new_index = nil + for i = 0; uint32(i) < next_index; i++ { + out[i] = tmp[i] + } + + tmp = nil + return uint(next_index) +} + +func clusterHistogramsDistance(in []histogramDistance, in_size uint, max_histograms uint, out []histogramDistance, out_size *uint, histogram_symbols []uint32) { + var cluster_size []uint32 = make([]uint32, in_size) + var clusters []uint32 = make([]uint32, in_size) + var num_clusters uint = 0 + var max_input_histograms uint = 64 + var pairs_capacity uint = max_input_histograms * max_input_histograms / 2 + var pairs []histogramPair = make([]histogramPair, (pairs_capacity + 1)) + var i uint + + /* For the first pass of clustering, we allow all pairs. */ + for i = 0; i < in_size; i++ { + cluster_size[i] = 1 + } + + for i = 0; i < in_size; i++ { + out[i] = in[i] + out[i].bit_cost_ = populationCostDistance(&in[i]) + histogram_symbols[i] = uint32(i) + } + + for i = 0; i < in_size; i += max_input_histograms { + var num_to_combine uint = brotli_min_size_t(in_size-i, max_input_histograms) + var num_new_clusters uint + var j uint + for j = 0; j < num_to_combine; j++ { + clusters[num_clusters+j] = uint32(i + j) + } + + num_new_clusters = histogramCombineDistance(out, cluster_size, histogram_symbols[i:], clusters[num_clusters:], pairs, num_to_combine, num_to_combine, max_histograms, pairs_capacity) + num_clusters += num_new_clusters + } + { + /* For the second pass, we limit the total number of histogram pairs. + After this limit is reached, we only keep searching for the best pair. */ + var max_num_pairs uint = brotli_min_size_t(64*num_clusters, (num_clusters/2)*num_clusters) + if pairs_capacity < (max_num_pairs + 1) { + var _new_size uint + if pairs_capacity == 0 { + _new_size = max_num_pairs + 1 + } else { + _new_size = pairs_capacity + } + var new_array []histogramPair + for _new_size < (max_num_pairs + 1) { + _new_size *= 2 + } + new_array = make([]histogramPair, _new_size) + if pairs_capacity != 0 { + copy(new_array, pairs[:pairs_capacity]) + } + + pairs = new_array + pairs_capacity = _new_size + } + + /* Collapse similar histograms. */ + num_clusters = histogramCombineDistance(out, cluster_size, histogram_symbols, clusters, pairs, num_clusters, in_size, max_histograms, max_num_pairs) + } + + pairs = nil + cluster_size = nil + + /* Find the optimal map from original histograms to the final ones. */ + histogramRemapDistance(in, in_size, clusters, num_clusters, out, histogram_symbols) + + clusters = nil + + /* Convert the context map to a canonical form. */ + *out_size = histogramReindexDistance(out, histogram_symbols, in_size) +} diff --git a/backend/vendor/github.com/andybalholm/brotli/cluster_literal.go b/backend/vendor/github.com/andybalholm/brotli/cluster_literal.go new file mode 100644 index 0000000..6ba66f3 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/cluster_literal.go @@ -0,0 +1,326 @@ +package brotli + +import "math" + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Computes the bit cost reduction by combining out[idx1] and out[idx2] and if + it is below a threshold, stores the pair (idx1, idx2) in the *pairs queue. */ +func compareAndPushToQueueLiteral(out []histogramLiteral, cluster_size []uint32, idx1 uint32, idx2 uint32, max_num_pairs uint, pairs []histogramPair, num_pairs *uint) { + var is_good_pair bool = false + var p histogramPair + p.idx2 = 0 + p.idx1 = p.idx2 + p.cost_combo = 0 + p.cost_diff = p.cost_combo + if idx1 == idx2 { + return + } + + if idx2 < idx1 { + var t uint32 = idx2 + idx2 = idx1 + idx1 = t + } + + p.idx1 = idx1 + p.idx2 = idx2 + p.cost_diff = 0.5 * clusterCostDiff(uint(cluster_size[idx1]), uint(cluster_size[idx2])) + p.cost_diff -= out[idx1].bit_cost_ + p.cost_diff -= out[idx2].bit_cost_ + + if out[idx1].total_count_ == 0 { + p.cost_combo = out[idx2].bit_cost_ + is_good_pair = true + } else if out[idx2].total_count_ == 0 { + p.cost_combo = out[idx1].bit_cost_ + is_good_pair = true + } else { + var threshold float64 + if *num_pairs == 0 { + threshold = 1e99 + } else { + threshold = brotli_max_double(0.0, pairs[0].cost_diff) + } + var combo histogramLiteral = out[idx1] + var cost_combo float64 + histogramAddHistogramLiteral(&combo, &out[idx2]) + cost_combo = populationCostLiteral(&combo) + if cost_combo < threshold-p.cost_diff { + p.cost_combo = cost_combo + is_good_pair = true + } + } + + if is_good_pair { + p.cost_diff += p.cost_combo + if *num_pairs > 0 && histogramPairIsLess(&pairs[0], &p) { + /* Replace the top of the queue if needed. */ + if *num_pairs < max_num_pairs { + pairs[*num_pairs] = pairs[0] + (*num_pairs)++ + } + + pairs[0] = p + } else if *num_pairs < max_num_pairs { + pairs[*num_pairs] = p + (*num_pairs)++ + } + } +} + +func histogramCombineLiteral(out []histogramLiteral, cluster_size []uint32, symbols []uint32, clusters []uint32, pairs []histogramPair, num_clusters uint, symbols_size uint, max_clusters uint, max_num_pairs uint) uint { + var cost_diff_threshold float64 = 0.0 + var min_cluster_size uint = 1 + var num_pairs uint = 0 + { + /* We maintain a vector of histogram pairs, with the property that the pair + with the maximum bit cost reduction is the first. */ + var idx1 uint + for idx1 = 0; idx1 < num_clusters; idx1++ { + var idx2 uint + for idx2 = idx1 + 1; idx2 < num_clusters; idx2++ { + compareAndPushToQueueLiteral(out, cluster_size, clusters[idx1], clusters[idx2], max_num_pairs, pairs[0:], &num_pairs) + } + } + } + + for num_clusters > min_cluster_size { + var best_idx1 uint32 + var best_idx2 uint32 + var i uint + if pairs[0].cost_diff >= cost_diff_threshold { + cost_diff_threshold = 1e99 + min_cluster_size = max_clusters + continue + } + + /* Take the best pair from the top of heap. */ + best_idx1 = pairs[0].idx1 + + best_idx2 = pairs[0].idx2 + histogramAddHistogramLiteral(&out[best_idx1], &out[best_idx2]) + out[best_idx1].bit_cost_ = pairs[0].cost_combo + cluster_size[best_idx1] += cluster_size[best_idx2] + for i = 0; i < symbols_size; i++ { + if symbols[i] == best_idx2 { + symbols[i] = best_idx1 + } + } + + for i = 0; i < num_clusters; i++ { + if clusters[i] == best_idx2 { + copy(clusters[i:], clusters[i+1:][:num_clusters-i-1]) + break + } + } + + num_clusters-- + { + /* Remove pairs intersecting the just combined best pair. */ + var copy_to_idx uint = 0 + for i = 0; i < num_pairs; i++ { + var p *histogramPair = &pairs[i] + if p.idx1 == best_idx1 || p.idx2 == best_idx1 || p.idx1 == best_idx2 || p.idx2 == best_idx2 { + /* Remove invalid pair from the queue. */ + continue + } + + if histogramPairIsLess(&pairs[0], p) { + /* Replace the top of the queue if needed. */ + var front histogramPair = pairs[0] + pairs[0] = *p + pairs[copy_to_idx] = front + } else { + pairs[copy_to_idx] = *p + } + + copy_to_idx++ + } + + num_pairs = copy_to_idx + } + + /* Push new pairs formed with the combined histogram to the heap. */ + for i = 0; i < num_clusters; i++ { + compareAndPushToQueueLiteral(out, cluster_size, best_idx1, clusters[i], max_num_pairs, pairs[0:], &num_pairs) + } + } + + return num_clusters +} + +/* What is the bit cost of moving histogram from cur_symbol to candidate. */ +func histogramBitCostDistanceLiteral(histogram *histogramLiteral, candidate *histogramLiteral) float64 { + if histogram.total_count_ == 0 { + return 0.0 + } else { + var tmp histogramLiteral = *histogram + histogramAddHistogramLiteral(&tmp, candidate) + return populationCostLiteral(&tmp) - candidate.bit_cost_ + } +} + +/* Find the best 'out' histogram for each of the 'in' histograms. + When called, clusters[0..num_clusters) contains the unique values from + symbols[0..in_size), but this property is not preserved in this function. + Note: we assume that out[]->bit_cost_ is already up-to-date. */ +func histogramRemapLiteral(in []histogramLiteral, in_size uint, clusters []uint32, num_clusters uint, out []histogramLiteral, symbols []uint32) { + var i uint + for i = 0; i < in_size; i++ { + var best_out uint32 + if i == 0 { + best_out = symbols[0] + } else { + best_out = symbols[i-1] + } + var best_bits float64 = histogramBitCostDistanceLiteral(&in[i], &out[best_out]) + var j uint + for j = 0; j < num_clusters; j++ { + var cur_bits float64 = histogramBitCostDistanceLiteral(&in[i], &out[clusters[j]]) + if cur_bits < best_bits { + best_bits = cur_bits + best_out = clusters[j] + } + } + + symbols[i] = best_out + } + + /* Recompute each out based on raw and symbols. */ + for i = 0; i < num_clusters; i++ { + histogramClearLiteral(&out[clusters[i]]) + } + + for i = 0; i < in_size; i++ { + histogramAddHistogramLiteral(&out[symbols[i]], &in[i]) + } +} + +/* Reorders elements of the out[0..length) array and changes values in + symbols[0..length) array in the following way: + * when called, symbols[] contains indexes into out[], and has N unique + values (possibly N < length) + * on return, symbols'[i] = f(symbols[i]) and + out'[symbols'[i]] = out[symbols[i]], for each 0 <= i < length, + where f is a bijection between the range of symbols[] and [0..N), and + the first occurrences of values in symbols'[i] come in consecutive + increasing order. + Returns N, the number of unique values in symbols[]. */ + +var histogramReindexLiteral_kInvalidIndex uint32 = math.MaxUint32 + +func histogramReindexLiteral(out []histogramLiteral, symbols []uint32, length uint) uint { + var new_index []uint32 = make([]uint32, length) + var next_index uint32 + var tmp []histogramLiteral + var i uint + for i = 0; i < length; i++ { + new_index[i] = histogramReindexLiteral_kInvalidIndex + } + + next_index = 0 + for i = 0; i < length; i++ { + if new_index[symbols[i]] == histogramReindexLiteral_kInvalidIndex { + new_index[symbols[i]] = next_index + next_index++ + } + } + + /* TODO: by using idea of "cycle-sort" we can avoid allocation of + tmp and reduce the number of copying by the factor of 2. */ + tmp = make([]histogramLiteral, next_index) + + next_index = 0 + for i = 0; i < length; i++ { + if new_index[symbols[i]] == next_index { + tmp[next_index] = out[symbols[i]] + next_index++ + } + + symbols[i] = new_index[symbols[i]] + } + + new_index = nil + for i = 0; uint32(i) < next_index; i++ { + out[i] = tmp[i] + } + + tmp = nil + return uint(next_index) +} + +func clusterHistogramsLiteral(in []histogramLiteral, in_size uint, max_histograms uint, out []histogramLiteral, out_size *uint, histogram_symbols []uint32) { + var cluster_size []uint32 = make([]uint32, in_size) + var clusters []uint32 = make([]uint32, in_size) + var num_clusters uint = 0 + var max_input_histograms uint = 64 + var pairs_capacity uint = max_input_histograms * max_input_histograms / 2 + var pairs []histogramPair = make([]histogramPair, (pairs_capacity + 1)) + var i uint + + /* For the first pass of clustering, we allow all pairs. */ + for i = 0; i < in_size; i++ { + cluster_size[i] = 1 + } + + for i = 0; i < in_size; i++ { + out[i] = in[i] + out[i].bit_cost_ = populationCostLiteral(&in[i]) + histogram_symbols[i] = uint32(i) + } + + for i = 0; i < in_size; i += max_input_histograms { + var num_to_combine uint = brotli_min_size_t(in_size-i, max_input_histograms) + var num_new_clusters uint + var j uint + for j = 0; j < num_to_combine; j++ { + clusters[num_clusters+j] = uint32(i + j) + } + + num_new_clusters = histogramCombineLiteral(out, cluster_size, histogram_symbols[i:], clusters[num_clusters:], pairs, num_to_combine, num_to_combine, max_histograms, pairs_capacity) + num_clusters += num_new_clusters + } + { + /* For the second pass, we limit the total number of histogram pairs. + After this limit is reached, we only keep searching for the best pair. */ + var max_num_pairs uint = brotli_min_size_t(64*num_clusters, (num_clusters/2)*num_clusters) + if pairs_capacity < (max_num_pairs + 1) { + var _new_size uint + if pairs_capacity == 0 { + _new_size = max_num_pairs + 1 + } else { + _new_size = pairs_capacity + } + var new_array []histogramPair + for _new_size < (max_num_pairs + 1) { + _new_size *= 2 + } + new_array = make([]histogramPair, _new_size) + if pairs_capacity != 0 { + copy(new_array, pairs[:pairs_capacity]) + } + + pairs = new_array + pairs_capacity = _new_size + } + + /* Collapse similar histograms. */ + num_clusters = histogramCombineLiteral(out, cluster_size, histogram_symbols, clusters, pairs, num_clusters, in_size, max_histograms, max_num_pairs) + } + + pairs = nil + cluster_size = nil + + /* Find the optimal map from original histograms to the final ones. */ + histogramRemapLiteral(in, in_size, clusters, num_clusters, out, histogram_symbols) + + clusters = nil + + /* Convert the context map to a canonical form. */ + *out_size = histogramReindexLiteral(out, histogram_symbols, in_size) +} diff --git a/backend/vendor/github.com/andybalholm/brotli/command.go b/backend/vendor/github.com/andybalholm/brotli/command.go new file mode 100644 index 0000000..b1662a5 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/command.go @@ -0,0 +1,254 @@ +package brotli + +var kInsBase = []uint32{ + 0, + 1, + 2, + 3, + 4, + 5, + 6, + 8, + 10, + 14, + 18, + 26, + 34, + 50, + 66, + 98, + 130, + 194, + 322, + 578, + 1090, + 2114, + 6210, + 22594, +} + +var kInsExtra = []uint32{ + 0, + 0, + 0, + 0, + 0, + 0, + 1, + 1, + 2, + 2, + 3, + 3, + 4, + 4, + 5, + 5, + 6, + 7, + 8, + 9, + 10, + 12, + 14, + 24, +} + +var kCopyBase = []uint32{ + 2, + 3, + 4, + 5, + 6, + 7, + 8, + 9, + 10, + 12, + 14, + 18, + 22, + 30, + 38, + 54, + 70, + 102, + 134, + 198, + 326, + 582, + 1094, + 2118, +} + +var kCopyExtra = []uint32{ + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 1, + 1, + 2, + 2, + 3, + 3, + 4, + 4, + 5, + 5, + 6, + 7, + 8, + 9, + 10, + 24, +} + +func getInsertLengthCode(insertlen uint) uint16 { + if insertlen < 6 { + return uint16(insertlen) + } else if insertlen < 130 { + var nbits uint32 = log2FloorNonZero(insertlen-2) - 1 + return uint16((nbits << 1) + uint32((insertlen-2)>>nbits) + 2) + } else if insertlen < 2114 { + return uint16(log2FloorNonZero(insertlen-66) + 10) + } else if insertlen < 6210 { + return 21 + } else if insertlen < 22594 { + return 22 + } else { + return 23 + } +} + +func getCopyLengthCode(copylen uint) uint16 { + if copylen < 10 { + return uint16(copylen - 2) + } else if copylen < 134 { + var nbits uint32 = log2FloorNonZero(copylen-6) - 1 + return uint16((nbits << 1) + uint32((copylen-6)>>nbits) + 4) + } else if copylen < 2118 { + return uint16(log2FloorNonZero(copylen-70) + 12) + } else { + return 23 + } +} + +func combineLengthCodes(inscode uint16, copycode uint16, use_last_distance bool) uint16 { + var bits64 uint16 = uint16(copycode&0x7 | (inscode&0x7)<<3) + if use_last_distance && inscode < 8 && copycode < 16 { + if copycode < 8 { + return bits64 + } else { + return bits64 | 64 + } + } else { + /* Specification: 5 Encoding of ... (last table) */ + /* offset = 2 * index, where index is in range [0..8] */ + var offset uint32 = 2 * ((uint32(copycode) >> 3) + 3*(uint32(inscode)>>3)) + + /* All values in specification are K * 64, + where K = [2, 3, 6, 4, 5, 8, 7, 9, 10], + i + 1 = [1, 2, 3, 4, 5, 6, 7, 8, 9], + K - i - 1 = [1, 1, 3, 0, 0, 2, 0, 1, 2] = D. + All values in D require only 2 bits to encode. + Magic constant is shifted 6 bits left, to avoid final multiplication. */ + offset = (offset << 5) + 0x40 + ((0x520D40 >> offset) & 0xC0) + + return uint16(offset | uint32(bits64)) + } +} + +func getLengthCode(insertlen uint, copylen uint, use_last_distance bool, code *uint16) { + var inscode uint16 = getInsertLengthCode(insertlen) + var copycode uint16 = getCopyLengthCode(copylen) + *code = combineLengthCodes(inscode, copycode, use_last_distance) +} + +func getInsertBase(inscode uint16) uint32 { + return kInsBase[inscode] +} + +func getInsertExtra(inscode uint16) uint32 { + return kInsExtra[inscode] +} + +func getCopyBase(copycode uint16) uint32 { + return kCopyBase[copycode] +} + +func getCopyExtra(copycode uint16) uint32 { + return kCopyExtra[copycode] +} + +type command struct { + insert_len_ uint32 + copy_len_ uint32 + dist_extra_ uint32 + cmd_prefix_ uint16 + dist_prefix_ uint16 +} + +/* distance_code is e.g. 0 for same-as-last short code, or 16 for offset 1. */ +func makeCommand(dist *distanceParams, insertlen uint, copylen uint, copylen_code_delta int, distance_code uint) (cmd command) { + /* Don't rely on signed int representation, use honest casts. */ + var delta uint32 = uint32(byte(int8(copylen_code_delta))) + cmd.insert_len_ = uint32(insertlen) + cmd.copy_len_ = uint32(uint32(copylen) | delta<<25) + + /* The distance prefix and extra bits are stored in this Command as if + npostfix and ndirect were 0, they are only recomputed later after the + clustering if needed. */ + prefixEncodeCopyDistance(distance_code, uint(dist.num_direct_distance_codes), uint(dist.distance_postfix_bits), &cmd.dist_prefix_, &cmd.dist_extra_) + getLengthCode(insertlen, uint(int(copylen)+copylen_code_delta), (cmd.dist_prefix_&0x3FF == 0), &cmd.cmd_prefix_) + + return cmd +} + +func makeInsertCommand(insertlen uint) (cmd command) { + cmd.insert_len_ = uint32(insertlen) + cmd.copy_len_ = 4 << 25 + cmd.dist_extra_ = 0 + cmd.dist_prefix_ = numDistanceShortCodes + getLengthCode(insertlen, 4, false, &cmd.cmd_prefix_) + return cmd +} + +func commandRestoreDistanceCode(self *command, dist *distanceParams) uint32 { + if uint32(self.dist_prefix_&0x3FF) < numDistanceShortCodes+dist.num_direct_distance_codes { + return uint32(self.dist_prefix_) & 0x3FF + } else { + var dcode uint32 = uint32(self.dist_prefix_) & 0x3FF + var nbits uint32 = uint32(self.dist_prefix_) >> 10 + var extra uint32 = self.dist_extra_ + var postfix_mask uint32 = (1 << dist.distance_postfix_bits) - 1 + var hcode uint32 = (dcode - dist.num_direct_distance_codes - numDistanceShortCodes) >> dist.distance_postfix_bits + var lcode uint32 = (dcode - dist.num_direct_distance_codes - numDistanceShortCodes) & postfix_mask + var offset uint32 = ((2 + (hcode & 1)) << nbits) - 4 + return ((offset + extra) << dist.distance_postfix_bits) + lcode + dist.num_direct_distance_codes + numDistanceShortCodes + } +} + +func commandDistanceContext(self *command) uint32 { + var r uint32 = uint32(self.cmd_prefix_) >> 6 + var c uint32 = uint32(self.cmd_prefix_) & 7 + if (r == 0 || r == 2 || r == 4 || r == 7) && (c <= 2) { + return c + } + + return 3 +} + +func commandCopyLen(self *command) uint32 { + return self.copy_len_ & 0x1FFFFFF +} + +func commandCopyLenCode(self *command) uint32 { + var modifier uint32 = self.copy_len_ >> 25 + var delta int32 = int32(int8(byte(modifier | (modifier&0x40)<<1))) + return uint32(int32(self.copy_len_&0x1FFFFFF) + delta) +} diff --git a/backend/vendor/github.com/andybalholm/brotli/compress_fragment.go b/backend/vendor/github.com/andybalholm/brotli/compress_fragment.go new file mode 100644 index 0000000..c9bd057 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/compress_fragment.go @@ -0,0 +1,834 @@ +package brotli + +import "encoding/binary" + +/* Copyright 2015 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Function for fast encoding of an input fragment, independently from the input + history. This function uses one-pass processing: when we find a backward + match, we immediately emit the corresponding command and literal codes to + the bit stream. + + Adapted from the CompressFragment() function in + https://github.com/google/snappy/blob/master/snappy.cc */ + +const maxDistance_compress_fragment = 262128 + +func hash5(p []byte, shift uint) uint32 { + var h uint64 = (binary.LittleEndian.Uint64(p) << 24) * uint64(kHashMul32) + return uint32(h >> shift) +} + +func hashBytesAtOffset5(v uint64, offset int, shift uint) uint32 { + assert(offset >= 0) + assert(offset <= 3) + { + var h uint64 = ((v >> uint(8*offset)) << 24) * uint64(kHashMul32) + return uint32(h >> shift) + } +} + +func isMatch5(p1 []byte, p2 []byte) bool { + return binary.LittleEndian.Uint32(p1) == binary.LittleEndian.Uint32(p2) && + p1[4] == p2[4] +} + +/* Builds a literal prefix code into "depths" and "bits" based on the statistics + of the "input" string and stores it into the bit stream. + Note that the prefix code here is built from the pre-LZ77 input, therefore + we can only approximate the statistics of the actual literal stream. + Moreover, for long inputs we build a histogram from a sample of the input + and thus have to assign a non-zero depth for each literal. + Returns estimated compression ratio millibytes/char for encoding given input + with generated code. */ +func buildAndStoreLiteralPrefixCode(input []byte, input_size uint, depths []byte, bits []uint16, storage_ix *uint, storage []byte) uint { + var histogram = [256]uint32{0} + var histogram_total uint + var i uint + if input_size < 1<<15 { + for i = 0; i < input_size; i++ { + histogram[input[i]]++ + } + + histogram_total = input_size + for i = 0; i < 256; i++ { + /* We weigh the first 11 samples with weight 3 to account for the + balancing effect of the LZ77 phase on the histogram. */ + var adjust uint32 = 2 * brotli_min_uint32_t(histogram[i], 11) + histogram[i] += adjust + histogram_total += uint(adjust) + } + } else { + const kSampleRate uint = 29 + for i = 0; i < input_size; i += kSampleRate { + histogram[input[i]]++ + } + + histogram_total = (input_size + kSampleRate - 1) / kSampleRate + for i = 0; i < 256; i++ { + /* We add 1 to each population count to avoid 0 bit depths (since this is + only a sample and we don't know if the symbol appears or not), and we + weigh the first 11 samples with weight 3 to account for the balancing + effect of the LZ77 phase on the histogram (more frequent symbols are + more likely to be in backward references instead as literals). */ + var adjust uint32 = 1 + 2*brotli_min_uint32_t(histogram[i], 11) + histogram[i] += adjust + histogram_total += uint(adjust) + } + } + + buildAndStoreHuffmanTreeFast(histogram[:], histogram_total, /* max_bits = */ + 8, depths, bits, storage_ix, storage) + { + var literal_ratio uint = 0 + for i = 0; i < 256; i++ { + if histogram[i] != 0 { + literal_ratio += uint(histogram[i] * uint32(depths[i])) + } + } + + /* Estimated encoding ratio, millibytes per symbol. */ + return (literal_ratio * 125) / histogram_total + } +} + +/* Builds a command and distance prefix code (each 64 symbols) into "depth" and + "bits" based on "histogram" and stores it into the bit stream. */ +func buildAndStoreCommandPrefixCode1(histogram []uint32, depth []byte, bits []uint16, storage_ix *uint, storage []byte) { + var tree [129]huffmanTree + var cmd_depth = [numCommandSymbols]byte{0} + /* Tree size for building a tree over 64 symbols is 2 * 64 + 1. */ + + var cmd_bits [64]uint16 + + createHuffmanTree(histogram, 64, 15, tree[:], depth) + createHuffmanTree(histogram[64:], 64, 14, tree[:], depth[64:]) + + /* We have to jump through a few hoops here in order to compute + the command bits because the symbols are in a different order than in + the full alphabet. This looks complicated, but having the symbols + in this order in the command bits saves a few branches in the Emit* + functions. */ + copy(cmd_depth[:], depth[:24]) + + copy(cmd_depth[24:][:], depth[40:][:8]) + copy(cmd_depth[32:][:], depth[24:][:8]) + copy(cmd_depth[40:][:], depth[48:][:8]) + copy(cmd_depth[48:][:], depth[32:][:8]) + copy(cmd_depth[56:][:], depth[56:][:8]) + convertBitDepthsToSymbols(cmd_depth[:], 64, cmd_bits[:]) + copy(bits, cmd_bits[:24]) + copy(bits[24:], cmd_bits[32:][:8]) + copy(bits[32:], cmd_bits[48:][:8]) + copy(bits[40:], cmd_bits[24:][:8]) + copy(bits[48:], cmd_bits[40:][:8]) + copy(bits[56:], cmd_bits[56:][:8]) + convertBitDepthsToSymbols(depth[64:], 64, bits[64:]) + { + /* Create the bit length array for the full command alphabet. */ + var i uint + for i := 0; i < int(64); i++ { + cmd_depth[i] = 0 + } /* only 64 first values were used */ + copy(cmd_depth[:], depth[:8]) + copy(cmd_depth[64:][:], depth[8:][:8]) + copy(cmd_depth[128:][:], depth[16:][:8]) + copy(cmd_depth[192:][:], depth[24:][:8]) + copy(cmd_depth[384:][:], depth[32:][:8]) + for i = 0; i < 8; i++ { + cmd_depth[128+8*i] = depth[40+i] + cmd_depth[256+8*i] = depth[48+i] + cmd_depth[448+8*i] = depth[56+i] + } + + storeHuffmanTree(cmd_depth[:], numCommandSymbols, tree[:], storage_ix, storage) + } + + storeHuffmanTree(depth[64:], 64, tree[:], storage_ix, storage) +} + +/* REQUIRES: insertlen < 6210 */ +func emitInsertLen1(insertlen uint, depth []byte, bits []uint16, histo []uint32, storage_ix *uint, storage []byte) { + if insertlen < 6 { + var code uint = insertlen + 40 + writeBits(uint(depth[code]), uint64(bits[code]), storage_ix, storage) + histo[code]++ + } else if insertlen < 130 { + var tail uint = insertlen - 2 + var nbits uint32 = log2FloorNonZero(tail) - 1 + var prefix uint = tail >> nbits + var inscode uint = uint((nbits << 1) + uint32(prefix) + 42) + writeBits(uint(depth[inscode]), uint64(bits[inscode]), storage_ix, storage) + writeBits(uint(nbits), uint64(tail)-(uint64(prefix)<> nbits + var code uint = uint((nbits << 1) + uint32(prefix) + 20) + writeBits(uint(depth[code]), uint64(bits[code]), storage_ix, storage) + writeBits(uint(nbits), uint64(tail)-(uint64(prefix)<> nbits + var code uint = uint((nbits << 1) + uint32(prefix) + 4) + writeBits(uint(depth[code]), uint64(bits[code]), storage_ix, storage) + writeBits(uint(nbits), uint64(tail)-(uint64(prefix)<> 5) + 30 + writeBits(uint(depth[code]), uint64(bits[code]), storage_ix, storage) + writeBits(5, uint64(tail)&31, storage_ix, storage) + writeBits(uint(depth[64]), uint64(bits[64]), storage_ix, storage) + histo[code]++ + histo[64]++ + } else if copylen < 2120 { + var tail uint = copylen - 72 + var nbits uint32 = log2FloorNonZero(tail) + var code uint = uint(nbits + 28) + writeBits(uint(depth[code]), uint64(bits[code]), storage_ix, storage) + writeBits(uint(nbits), uint64(tail)-(uint64(uint(1))<> nbits) & 1 + var offset uint = (2 + prefix) << nbits + var distcode uint = uint(2*(nbits-1) + uint32(prefix) + 80) + writeBits(uint(depth[distcode]), uint64(bits[distcode]), storage_ix, storage) + writeBits(uint(nbits), uint64(d)-uint64(offset), storage_ix, storage) + histo[distcode]++ +} + +func emitLiterals(input []byte, len uint, depth []byte, bits []uint16, storage_ix *uint, storage []byte) { + var j uint + for j = 0; j < len; j++ { + var lit byte = input[j] + writeBits(uint(depth[lit]), uint64(bits[lit]), storage_ix, storage) + } +} + +/* REQUIRES: len <= 1 << 24. */ +func storeMetaBlockHeader1(len uint, is_uncompressed bool, storage_ix *uint, storage []byte) { + var nibbles uint = 6 + + /* ISLAST */ + writeBits(1, 0, storage_ix, storage) + + if len <= 1<<16 { + nibbles = 4 + } else if len <= 1<<20 { + nibbles = 5 + } + + writeBits(2, uint64(nibbles)-4, storage_ix, storage) + writeBits(nibbles*4, uint64(len)-1, storage_ix, storage) + + /* ISUNCOMPRESSED */ + writeSingleBit(is_uncompressed, storage_ix, storage) +} + +func updateBits(n_bits uint, bits uint32, pos uint, array []byte) { + for n_bits > 0 { + var byte_pos uint = pos >> 3 + var n_unchanged_bits uint = pos & 7 + var n_changed_bits uint = brotli_min_size_t(n_bits, 8-n_unchanged_bits) + var total_bits uint = n_unchanged_bits + n_changed_bits + var mask uint32 = (^((1 << total_bits) - 1)) | ((1 << n_unchanged_bits) - 1) + var unchanged_bits uint32 = uint32(array[byte_pos]) & mask + var changed_bits uint32 = bits & ((1 << n_changed_bits) - 1) + array[byte_pos] = byte(changed_bits<>= n_changed_bits + pos += n_changed_bits + } +} + +func rewindBitPosition1(new_storage_ix uint, storage_ix *uint, storage []byte) { + var bitpos uint = new_storage_ix & 7 + var mask uint = (1 << bitpos) - 1 + storage[new_storage_ix>>3] &= byte(mask) + *storage_ix = new_storage_ix +} + +var shouldMergeBlock_kSampleRate uint = 43 + +func shouldMergeBlock(data []byte, len uint, depths []byte) bool { + var histo = [256]uint{0} + var i uint + for i = 0; i < len; i += shouldMergeBlock_kSampleRate { + histo[data[i]]++ + } + { + var total uint = (len + shouldMergeBlock_kSampleRate - 1) / shouldMergeBlock_kSampleRate + var r float64 = (fastLog2(total)+0.5)*float64(total) + 200 + for i = 0; i < 256; i++ { + r -= float64(histo[i]) * (float64(depths[i]) + fastLog2(histo[i])) + } + + return r >= 0.0 + } +} + +func shouldUseUncompressedMode(metablock_start []byte, next_emit []byte, insertlen uint, literal_ratio uint) bool { + var compressed uint = uint(-cap(next_emit) + cap(metablock_start)) + if compressed*50 > insertlen { + return false + } else { + return literal_ratio > 980 + } +} + +func emitUncompressedMetaBlock1(begin []byte, end []byte, storage_ix_start uint, storage_ix *uint, storage []byte) { + var len uint = uint(-cap(end) + cap(begin)) + rewindBitPosition1(storage_ix_start, storage_ix, storage) + storeMetaBlockHeader1(uint(len), true, storage_ix, storage) + *storage_ix = (*storage_ix + 7) &^ 7 + copy(storage[*storage_ix>>3:], begin[:len]) + *storage_ix += uint(len << 3) + storage[*storage_ix>>3] = 0 +} + +var kCmdHistoSeed = [128]uint32{ + 0, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 0, + 0, + 0, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 0, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 0, + 0, + 0, + 0, +} + +var compressFragmentFastImpl_kFirstBlockSize uint = 3 << 15 +var compressFragmentFastImpl_kMergeBlockSize uint = 1 << 16 + +func compressFragmentFastImpl(in []byte, input_size uint, is_last bool, table []int, table_bits uint, cmd_depth []byte, cmd_bits []uint16, cmd_code_numbits *uint, cmd_code []byte, storage_ix *uint, storage []byte) { + var cmd_histo [128]uint32 + var ip_end int + var next_emit int = 0 + var base_ip int = 0 + var input int = 0 + const kInputMarginBytes uint = windowGap + const kMinMatchLen uint = 5 + var metablock_start int = input + var block_size uint = brotli_min_size_t(input_size, compressFragmentFastImpl_kFirstBlockSize) + var total_block_size uint = block_size + var mlen_storage_ix uint = *storage_ix + 3 + var lit_depth [256]byte + var lit_bits [256]uint16 + var literal_ratio uint + var ip int + var last_distance int + var shift uint = 64 - table_bits + + /* "next_emit" is a pointer to the first byte that is not covered by a + previous copy. Bytes between "next_emit" and the start of the next copy or + the end of the input will be emitted as literal bytes. */ + + /* Save the start of the first block for position and distance computations. + */ + + /* Save the bit position of the MLEN field of the meta-block header, so that + we can update it later if we decide to extend this meta-block. */ + storeMetaBlockHeader1(block_size, false, storage_ix, storage) + + /* No block splits, no contexts. */ + writeBits(13, 0, storage_ix, storage) + + literal_ratio = buildAndStoreLiteralPrefixCode(in[input:], block_size, lit_depth[:], lit_bits[:], storage_ix, storage) + { + /* Store the pre-compressed command and distance prefix codes. */ + var i uint + for i = 0; i+7 < *cmd_code_numbits; i += 8 { + writeBits(8, uint64(cmd_code[i>>3]), storage_ix, storage) + } + } + + writeBits(*cmd_code_numbits&7, uint64(cmd_code[*cmd_code_numbits>>3]), storage_ix, storage) + + /* Initialize the command and distance histograms. We will gather + statistics of command and distance codes during the processing + of this block and use it to update the command and distance + prefix codes for the next block. */ +emit_commands: + copy(cmd_histo[:], kCmdHistoSeed[:]) + + /* "ip" is the input pointer. */ + ip = input + + last_distance = -1 + ip_end = int(uint(input) + block_size) + + if block_size >= kInputMarginBytes { + var len_limit uint = brotli_min_size_t(block_size-kMinMatchLen, input_size-kInputMarginBytes) + var ip_limit int = int(uint(input) + len_limit) + /* For the last block, we need to keep a 16 bytes margin so that we can be + sure that all distances are at most window size - 16. + For all other blocks, we only need to keep a margin of 5 bytes so that + we don't go over the block size with a copy. */ + + var next_hash uint32 + ip++ + for next_hash = hash5(in[ip:], shift); ; { + var skip uint32 = 32 + var next_ip int = ip + /* Step 1: Scan forward in the input looking for a 5-byte-long match. + If we get close to exhausting the input then goto emit_remainder. + + Heuristic match skipping: If 32 bytes are scanned with no matches + found, start looking only at every other byte. If 32 more bytes are + scanned, look at every third byte, etc.. When a match is found, + immediately go back to looking at every byte. This is a small loss + (~5% performance, ~0.1% density) for compressible data due to more + bookkeeping, but for non-compressible data (such as JPEG) it's a huge + win since the compressor quickly "realizes" the data is incompressible + and doesn't bother looking for matches everywhere. + + The "skip" variable keeps track of how many bytes there are since the + last match; dividing it by 32 (i.e. right-shifting by five) gives the + number of bytes to move ahead for each iteration. */ + + var candidate int + assert(next_emit < ip) + + trawl: + for { + var hash uint32 = next_hash + var bytes_between_hash_lookups uint32 = skip >> 5 + skip++ + assert(hash == hash5(in[next_ip:], shift)) + ip = next_ip + next_ip = int(uint32(ip) + bytes_between_hash_lookups) + if next_ip > ip_limit { + goto emit_remainder + } + + next_hash = hash5(in[next_ip:], shift) + candidate = ip - last_distance + if isMatch5(in[ip:], in[candidate:]) { + if candidate < ip { + table[hash] = int(ip - base_ip) + break + } + } + + candidate = base_ip + table[hash] + assert(candidate >= base_ip) + assert(candidate < ip) + + table[hash] = int(ip - base_ip) + if isMatch5(in[ip:], in[candidate:]) { + break + } + } + + /* Check copy distance. If candidate is not feasible, continue search. + Checking is done outside of hot loop to reduce overhead. */ + if ip-candidate > maxDistance_compress_fragment { + goto trawl + } + + /* Step 2: Emit the found match together with the literal bytes from + "next_emit" to the bit stream, and then see if we can find a next match + immediately afterwards. Repeat until we find no match for the input + without emitting some literal bytes. */ + { + var base int = ip + /* > 0 */ + var matched uint = 5 + findMatchLengthWithLimit(in[candidate+5:], in[ip+5:], uint(ip_end-ip)-5) + var distance int = int(base - candidate) + /* We have a 5-byte match at ip, and we need to emit bytes in + [next_emit, ip). */ + + var insert uint = uint(base - next_emit) + ip += int(matched) + if insert < 6210 { + emitInsertLen1(insert, cmd_depth, cmd_bits, cmd_histo[:], storage_ix, storage) + } else if shouldUseUncompressedMode(in[metablock_start:], in[next_emit:], insert, literal_ratio) { + emitUncompressedMetaBlock1(in[metablock_start:], in[base:], mlen_storage_ix-3, storage_ix, storage) + input_size -= uint(base - input) + input = base + next_emit = input + goto next_block + } else { + emitLongInsertLen(insert, cmd_depth, cmd_bits, cmd_histo[:], storage_ix, storage) + } + + emitLiterals(in[next_emit:], insert, lit_depth[:], lit_bits[:], storage_ix, storage) + if distance == last_distance { + writeBits(uint(cmd_depth[64]), uint64(cmd_bits[64]), storage_ix, storage) + cmd_histo[64]++ + } else { + emitDistance1(uint(distance), cmd_depth, cmd_bits, cmd_histo[:], storage_ix, storage) + last_distance = distance + } + + emitCopyLenLastDistance1(matched, cmd_depth, cmd_bits, cmd_histo[:], storage_ix, storage) + + next_emit = ip + if ip >= ip_limit { + goto emit_remainder + } + + /* We could immediately start working at ip now, but to improve + compression we first update "table" with the hashes of some positions + within the last copy. */ + { + var input_bytes uint64 = binary.LittleEndian.Uint64(in[ip-3:]) + var prev_hash uint32 = hashBytesAtOffset5(input_bytes, 0, shift) + var cur_hash uint32 = hashBytesAtOffset5(input_bytes, 3, shift) + table[prev_hash] = int(ip - base_ip - 3) + prev_hash = hashBytesAtOffset5(input_bytes, 1, shift) + table[prev_hash] = int(ip - base_ip - 2) + prev_hash = hashBytesAtOffset5(input_bytes, 2, shift) + table[prev_hash] = int(ip - base_ip - 1) + + candidate = base_ip + table[cur_hash] + table[cur_hash] = int(ip - base_ip) + } + } + + for isMatch5(in[ip:], in[candidate:]) { + var base int = ip + /* We have a 5-byte match at ip, and no need to emit any literal bytes + prior to ip. */ + + var matched uint = 5 + findMatchLengthWithLimit(in[candidate+5:], in[ip+5:], uint(ip_end-ip)-5) + if ip-candidate > maxDistance_compress_fragment { + break + } + ip += int(matched) + last_distance = int(base - candidate) /* > 0 */ + emitCopyLen1(matched, cmd_depth, cmd_bits, cmd_histo[:], storage_ix, storage) + emitDistance1(uint(last_distance), cmd_depth, cmd_bits, cmd_histo[:], storage_ix, storage) + + next_emit = ip + if ip >= ip_limit { + goto emit_remainder + } + + /* We could immediately start working at ip now, but to improve + compression we first update "table" with the hashes of some positions + within the last copy. */ + { + var input_bytes uint64 = binary.LittleEndian.Uint64(in[ip-3:]) + var prev_hash uint32 = hashBytesAtOffset5(input_bytes, 0, shift) + var cur_hash uint32 = hashBytesAtOffset5(input_bytes, 3, shift) + table[prev_hash] = int(ip - base_ip - 3) + prev_hash = hashBytesAtOffset5(input_bytes, 1, shift) + table[prev_hash] = int(ip - base_ip - 2) + prev_hash = hashBytesAtOffset5(input_bytes, 2, shift) + table[prev_hash] = int(ip - base_ip - 1) + + candidate = base_ip + table[cur_hash] + table[cur_hash] = int(ip - base_ip) + } + } + + ip++ + next_hash = hash5(in[ip:], shift) + } + } + +emit_remainder: + assert(next_emit <= ip_end) + input += int(block_size) + input_size -= block_size + block_size = brotli_min_size_t(input_size, compressFragmentFastImpl_kMergeBlockSize) + + /* Decide if we want to continue this meta-block instead of emitting the + last insert-only command. */ + if input_size > 0 && total_block_size+block_size <= 1<<20 && shouldMergeBlock(in[input:], block_size, lit_depth[:]) { + assert(total_block_size > 1<<16) + + /* Update the size of the current meta-block and continue emitting commands. + We can do this because the current size and the new size both have 5 + nibbles. */ + total_block_size += block_size + + updateBits(20, uint32(total_block_size-1), mlen_storage_ix, storage) + goto emit_commands + } + + /* Emit the remaining bytes as literals. */ + if next_emit < ip_end { + var insert uint = uint(ip_end - next_emit) + if insert < 6210 { + emitInsertLen1(insert, cmd_depth, cmd_bits, cmd_histo[:], storage_ix, storage) + emitLiterals(in[next_emit:], insert, lit_depth[:], lit_bits[:], storage_ix, storage) + } else if shouldUseUncompressedMode(in[metablock_start:], in[next_emit:], insert, literal_ratio) { + emitUncompressedMetaBlock1(in[metablock_start:], in[ip_end:], mlen_storage_ix-3, storage_ix, storage) + } else { + emitLongInsertLen(insert, cmd_depth, cmd_bits, cmd_histo[:], storage_ix, storage) + emitLiterals(in[next_emit:], insert, lit_depth[:], lit_bits[:], storage_ix, storage) + } + } + + next_emit = ip_end + + /* If we have more data, write a new meta-block header and prefix codes and + then continue emitting commands. */ +next_block: + if input_size > 0 { + metablock_start = input + block_size = brotli_min_size_t(input_size, compressFragmentFastImpl_kFirstBlockSize) + total_block_size = block_size + + /* Save the bit position of the MLEN field of the meta-block header, so that + we can update it later if we decide to extend this meta-block. */ + mlen_storage_ix = *storage_ix + 3 + + storeMetaBlockHeader1(block_size, false, storage_ix, storage) + + /* No block splits, no contexts. */ + writeBits(13, 0, storage_ix, storage) + + literal_ratio = buildAndStoreLiteralPrefixCode(in[input:], block_size, lit_depth[:], lit_bits[:], storage_ix, storage) + buildAndStoreCommandPrefixCode1(cmd_histo[:], cmd_depth, cmd_bits, storage_ix, storage) + goto emit_commands + } + + if !is_last { + /* If this is not the last block, update the command and distance prefix + codes for the next block and store the compressed forms. */ + cmd_code[0] = 0 + + *cmd_code_numbits = 0 + buildAndStoreCommandPrefixCode1(cmd_histo[:], cmd_depth, cmd_bits, cmd_code_numbits, cmd_code) + } +} + +/* Compresses "input" string to the "*storage" buffer as one or more complete + meta-blocks, and updates the "*storage_ix" bit position. + + If "is_last" is 1, emits an additional empty last meta-block. + + "cmd_depth" and "cmd_bits" contain the command and distance prefix codes + (see comment in encode.h) used for the encoding of this input fragment. + If "is_last" is 0, they are updated to reflect the statistics + of this input fragment, to be used for the encoding of the next fragment. + + "*cmd_code_numbits" is the number of bits of the compressed representation + of the command and distance prefix codes, and "cmd_code" is an array of + at least "(*cmd_code_numbits + 7) >> 3" size that contains the compressed + command and distance prefix codes. If "is_last" is 0, these are also + updated to represent the updated "cmd_depth" and "cmd_bits". + + REQUIRES: "input_size" is greater than zero, or "is_last" is 1. + REQUIRES: "input_size" is less or equal to maximal metablock size (1 << 24). + REQUIRES: All elements in "table[0..table_size-1]" are initialized to zero. + REQUIRES: "table_size" is an odd (9, 11, 13, 15) power of two + OUTPUT: maximal copy distance <= |input_size| + OUTPUT: maximal copy distance <= BROTLI_MAX_BACKWARD_LIMIT(18) */ +func compressFragmentFast(input []byte, input_size uint, is_last bool, table []int, table_size uint, cmd_depth []byte, cmd_bits []uint16, cmd_code_numbits *uint, cmd_code []byte, storage_ix *uint, storage []byte) { + var initial_storage_ix uint = *storage_ix + var table_bits uint = uint(log2FloorNonZero(table_size)) + + if input_size == 0 { + assert(is_last) + writeBits(1, 1, storage_ix, storage) /* islast */ + writeBits(1, 1, storage_ix, storage) /* isempty */ + *storage_ix = (*storage_ix + 7) &^ 7 + return + } + + compressFragmentFastImpl(input, input_size, is_last, table, table_bits, cmd_depth, cmd_bits, cmd_code_numbits, cmd_code, storage_ix, storage) + + /* If output is larger than single uncompressed block, rewrite it. */ + if *storage_ix-initial_storage_ix > 31+(input_size<<3) { + emitUncompressedMetaBlock1(input, input[input_size:], initial_storage_ix, storage_ix, storage) + } + + if is_last { + writeBits(1, 1, storage_ix, storage) /* islast */ + writeBits(1, 1, storage_ix, storage) /* isempty */ + *storage_ix = (*storage_ix + 7) &^ 7 + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/compress_fragment_two_pass.go b/backend/vendor/github.com/andybalholm/brotli/compress_fragment_two_pass.go new file mode 100644 index 0000000..c5c663a --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/compress_fragment_two_pass.go @@ -0,0 +1,775 @@ +package brotli + +import "encoding/binary" + +/* Copyright 2015 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Function for fast encoding of an input fragment, independently from the input + history. This function uses two-pass processing: in the first pass we save + the found backward matches and literal bytes into a buffer, and in the + second pass we emit them into the bit stream using prefix codes built based + on the actual command and literal byte histograms. */ + +const kCompressFragmentTwoPassBlockSize uint = 1 << 17 + +func hash1(p []byte, shift uint, length uint) uint32 { + var h uint64 = (binary.LittleEndian.Uint64(p) << ((8 - length) * 8)) * uint64(kHashMul32) + return uint32(h >> shift) +} + +func hashBytesAtOffset(v uint64, offset uint, shift uint, length uint) uint32 { + assert(offset <= 8-length) + { + var h uint64 = ((v >> (8 * offset)) << ((8 - length) * 8)) * uint64(kHashMul32) + return uint32(h >> shift) + } +} + +func isMatch1(p1 []byte, p2 []byte, length uint) bool { + if binary.LittleEndian.Uint32(p1) != binary.LittleEndian.Uint32(p2) { + return false + } + if length == 4 { + return true + } + return p1[4] == p2[4] && p1[5] == p2[5] +} + +/* +Builds a command and distance prefix code (each 64 symbols) into "depth" and + + "bits" based on "histogram" and stores it into the bit stream. +*/ +func buildAndStoreCommandPrefixCode(histogram []uint32, depth []byte, bits []uint16, storage_ix *uint, storage []byte) { + var tree [129]huffmanTree + var cmd_depth = [numCommandSymbols]byte{0} + /* Tree size for building a tree over 64 symbols is 2 * 64 + 1. */ + + var cmd_bits [64]uint16 + createHuffmanTree(histogram, 64, 15, tree[:], depth) + createHuffmanTree(histogram[64:], 64, 14, tree[:], depth[64:]) + + /* We have to jump through a few hoops here in order to compute + the command bits because the symbols are in a different order than in + the full alphabet. This looks complicated, but having the symbols + in this order in the command bits saves a few branches in the Emit* + functions. */ + copy(cmd_depth[:], depth[24:][:24]) + + copy(cmd_depth[24:][:], depth[:8]) + copy(cmd_depth[32:][:], depth[48:][:8]) + copy(cmd_depth[40:][:], depth[8:][:8]) + copy(cmd_depth[48:][:], depth[56:][:8]) + copy(cmd_depth[56:][:], depth[16:][:8]) + convertBitDepthsToSymbols(cmd_depth[:], 64, cmd_bits[:]) + copy(bits, cmd_bits[24:][:8]) + copy(bits[8:], cmd_bits[40:][:8]) + copy(bits[16:], cmd_bits[56:][:8]) + copy(bits[24:], cmd_bits[:24]) + copy(bits[48:], cmd_bits[32:][:8]) + copy(bits[56:], cmd_bits[48:][:8]) + convertBitDepthsToSymbols(depth[64:], 64, bits[64:]) + { + /* Create the bit length array for the full command alphabet. */ + var i uint + for i := 0; i < int(64); i++ { + cmd_depth[i] = 0 + } /* only 64 first values were used */ + copy(cmd_depth[:], depth[24:][:8]) + copy(cmd_depth[64:][:], depth[32:][:8]) + copy(cmd_depth[128:][:], depth[40:][:8]) + copy(cmd_depth[192:][:], depth[48:][:8]) + copy(cmd_depth[384:][:], depth[56:][:8]) + for i = 0; i < 8; i++ { + cmd_depth[128+8*i] = depth[i] + cmd_depth[256+8*i] = depth[8+i] + cmd_depth[448+8*i] = depth[16+i] + } + + storeHuffmanTree(cmd_depth[:], numCommandSymbols, tree[:], storage_ix, storage) + } + + storeHuffmanTree(depth[64:], 64, tree[:], storage_ix, storage) +} + +func emitInsertLen(insertlen uint32, commands *[]uint32) { + if insertlen < 6 { + (*commands)[0] = insertlen + } else if insertlen < 130 { + var tail uint32 = insertlen - 2 + var nbits uint32 = log2FloorNonZero(uint(tail)) - 1 + var prefix uint32 = tail >> nbits + var inscode uint32 = (nbits << 1) + prefix + 2 + var extra uint32 = tail - (prefix << nbits) + (*commands)[0] = inscode | extra<<8 + } else if insertlen < 2114 { + var tail uint32 = insertlen - 66 + var nbits uint32 = log2FloorNonZero(uint(tail)) + var code uint32 = nbits + 10 + var extra uint32 = tail - (1 << nbits) + (*commands)[0] = code | extra<<8 + } else if insertlen < 6210 { + var extra uint32 = insertlen - 2114 + (*commands)[0] = 21 | extra<<8 + } else if insertlen < 22594 { + var extra uint32 = insertlen - 6210 + (*commands)[0] = 22 | extra<<8 + } else { + var extra uint32 = insertlen - 22594 + (*commands)[0] = 23 | extra<<8 + } + + *commands = (*commands)[1:] +} + +func emitCopyLen(copylen uint, commands *[]uint32) { + if copylen < 10 { + (*commands)[0] = uint32(copylen + 38) + } else if copylen < 134 { + var tail uint = copylen - 6 + var nbits uint = uint(log2FloorNonZero(tail) - 1) + var prefix uint = tail >> nbits + var code uint = (nbits << 1) + prefix + 44 + var extra uint = tail - (prefix << nbits) + (*commands)[0] = uint32(code | extra<<8) + } else if copylen < 2118 { + var tail uint = copylen - 70 + var nbits uint = uint(log2FloorNonZero(tail)) + var code uint = nbits + 52 + var extra uint = tail - (uint(1) << nbits) + (*commands)[0] = uint32(code | extra<<8) + } else { + var extra uint = copylen - 2118 + (*commands)[0] = uint32(63 | extra<<8) + } + + *commands = (*commands)[1:] +} + +func emitCopyLenLastDistance(copylen uint, commands *[]uint32) { + if copylen < 12 { + (*commands)[0] = uint32(copylen + 20) + *commands = (*commands)[1:] + } else if copylen < 72 { + var tail uint = copylen - 8 + var nbits uint = uint(log2FloorNonZero(tail) - 1) + var prefix uint = tail >> nbits + var code uint = (nbits << 1) + prefix + 28 + var extra uint = tail - (prefix << nbits) + (*commands)[0] = uint32(code | extra<<8) + *commands = (*commands)[1:] + } else if copylen < 136 { + var tail uint = copylen - 8 + var code uint = (tail >> 5) + 54 + var extra uint = tail & 31 + (*commands)[0] = uint32(code | extra<<8) + *commands = (*commands)[1:] + (*commands)[0] = 64 + *commands = (*commands)[1:] + } else if copylen < 2120 { + var tail uint = copylen - 72 + var nbits uint = uint(log2FloorNonZero(tail)) + var code uint = nbits + 52 + var extra uint = tail - (uint(1) << nbits) + (*commands)[0] = uint32(code | extra<<8) + *commands = (*commands)[1:] + (*commands)[0] = 64 + *commands = (*commands)[1:] + } else { + var extra uint = copylen - 2120 + (*commands)[0] = uint32(63 | extra<<8) + *commands = (*commands)[1:] + (*commands)[0] = 64 + *commands = (*commands)[1:] + } +} + +func emitDistance(distance uint32, commands *[]uint32) { + var d uint32 = distance + 3 + var nbits uint32 = log2FloorNonZero(uint(d)) - 1 + var prefix uint32 = (d >> nbits) & 1 + var offset uint32 = (2 + prefix) << nbits + var distcode uint32 = 2*(nbits-1) + prefix + 80 + var extra uint32 = d - offset + (*commands)[0] = distcode | extra<<8 + *commands = (*commands)[1:] +} + +/* REQUIRES: len <= 1 << 24. */ +func storeMetaBlockHeader(len uint, is_uncompressed bool, storage_ix *uint, storage []byte) { + var nibbles uint = 6 + + /* ISLAST */ + writeBits(1, 0, storage_ix, storage) + + if len <= 1<<16 { + nibbles = 4 + } else if len <= 1<<20 { + nibbles = 5 + } + + writeBits(2, uint64(nibbles)-4, storage_ix, storage) + writeBits(nibbles*4, uint64(len)-1, storage_ix, storage) + + /* ISUNCOMPRESSED */ + writeSingleBit(is_uncompressed, storage_ix, storage) +} + +func storeMetaBlockHeaderBW(len uint, is_uncompressed bool, bw *bitWriter) { + var nibbles uint = 6 + + /* ISLAST */ + bw.writeBits(1, 0) + + if len <= 1<<16 { + nibbles = 4 + } else if len <= 1<<20 { + nibbles = 5 + } else if len > 1<<24 { + panic("metablock too long") + } + + bw.writeBits(2, uint64(nibbles)-4) + bw.writeBits(nibbles*4, uint64(len)-1) + + /* ISUNCOMPRESSED */ + bw.writeSingleBit(is_uncompressed) +} + +func createCommands(input []byte, block_size uint, input_size uint, base_ip_ptr []byte, table []int, table_bits uint, min_match uint, literals *[]byte, commands *[]uint32) { + var ip int = 0 + var shift uint = 64 - table_bits + var ip_end int = int(block_size) + var base_ip int = -cap(base_ip_ptr) + cap(input) + var next_emit int = 0 + var last_distance int = -1 + /* "ip" is the input pointer. */ + + const kInputMarginBytes uint = windowGap + + /* "next_emit" is a pointer to the first byte that is not covered by a + previous copy. Bytes between "next_emit" and the start of the next copy or + the end of the input will be emitted as literal bytes. */ + if block_size >= kInputMarginBytes { + var len_limit uint = brotli_min_size_t(block_size-min_match, input_size-kInputMarginBytes) + var ip_limit int = int(len_limit) + /* For the last block, we need to keep a 16 bytes margin so that we can be + sure that all distances are at most window size - 16. + For all other blocks, we only need to keep a margin of 5 bytes so that + we don't go over the block size with a copy. */ + + var next_hash uint32 + ip++ + for next_hash = hash1(input[ip:], shift, min_match); ; { + var skip uint32 = 32 + var next_ip int = ip + /* Step 1: Scan forward in the input looking for a 6-byte-long match. + If we get close to exhausting the input then goto emit_remainder. + + Heuristic match skipping: If 32 bytes are scanned with no matches + found, start looking only at every other byte. If 32 more bytes are + scanned, look at every third byte, etc.. When a match is found, + immediately go back to looking at every byte. This is a small loss + (~5% performance, ~0.1% density) for compressible data due to more + bookkeeping, but for non-compressible data (such as JPEG) it's a huge + win since the compressor quickly "realizes" the data is incompressible + and doesn't bother looking for matches everywhere. + + The "skip" variable keeps track of how many bytes there are since the + last match; dividing it by 32 (ie. right-shifting by five) gives the + number of bytes to move ahead for each iteration. */ + + var candidate int + + assert(next_emit < ip) + + trawl: + for { + var hash uint32 = next_hash + var bytes_between_hash_lookups uint32 = skip >> 5 + skip++ + ip = next_ip + assert(hash == hash1(input[ip:], shift, min_match)) + next_ip = int(uint32(ip) + bytes_between_hash_lookups) + if next_ip > ip_limit { + goto emit_remainder + } + + next_hash = hash1(input[next_ip:], shift, min_match) + candidate = ip - last_distance + if isMatch1(input[ip:], base_ip_ptr[candidate-base_ip:], min_match) { + if candidate < ip { + table[hash] = int(ip - base_ip) + break + } + } + + candidate = base_ip + table[hash] + assert(candidate >= base_ip) + assert(candidate < ip) + + table[hash] = int(ip - base_ip) + if isMatch1(input[ip:], base_ip_ptr[candidate-base_ip:], min_match) { + break + } + } + + /* Check copy distance. If candidate is not feasible, continue search. + Checking is done outside of hot loop to reduce overhead. */ + if ip-candidate > maxDistance_compress_fragment { + goto trawl + } + + /* Step 2: Emit the found match together with the literal bytes from + "next_emit", and then see if we can find a next match immediately + afterwards. Repeat until we find no match for the input + without emitting some literal bytes. */ + { + var base int = ip + /* > 0 */ + var matched uint = min_match + findMatchLengthWithLimit(base_ip_ptr[uint(candidate-base_ip)+min_match:], input[uint(ip)+min_match:], uint(ip_end-ip)-min_match) + var distance int = int(base - candidate) + /* We have a 6-byte match at ip, and we need to emit bytes in + [next_emit, ip). */ + + var insert int = int(base - next_emit) + ip += int(matched) + emitInsertLen(uint32(insert), commands) + copy(*literals, input[next_emit:][:uint(insert)]) + *literals = (*literals)[insert:] + if distance == last_distance { + (*commands)[0] = 64 + *commands = (*commands)[1:] + } else { + emitDistance(uint32(distance), commands) + last_distance = distance + } + + emitCopyLenLastDistance(matched, commands) + + next_emit = ip + if ip >= ip_limit { + goto emit_remainder + } + { + var input_bytes uint64 + var cur_hash uint32 + /* We could immediately start working at ip now, but to improve + compression we first update "table" with the hashes of some + positions within the last copy. */ + + var prev_hash uint32 + if min_match == 4 { + input_bytes = binary.LittleEndian.Uint64(input[ip-3:]) + cur_hash = hashBytesAtOffset(input_bytes, 3, shift, min_match) + prev_hash = hashBytesAtOffset(input_bytes, 0, shift, min_match) + table[prev_hash] = int(ip - base_ip - 3) + prev_hash = hashBytesAtOffset(input_bytes, 1, shift, min_match) + table[prev_hash] = int(ip - base_ip - 2) + prev_hash = hashBytesAtOffset(input_bytes, 0, shift, min_match) + table[prev_hash] = int(ip - base_ip - 1) + } else { + input_bytes = binary.LittleEndian.Uint64(input[ip-5:]) + prev_hash = hashBytesAtOffset(input_bytes, 0, shift, min_match) + table[prev_hash] = int(ip - base_ip - 5) + prev_hash = hashBytesAtOffset(input_bytes, 1, shift, min_match) + table[prev_hash] = int(ip - base_ip - 4) + prev_hash = hashBytesAtOffset(input_bytes, 2, shift, min_match) + table[prev_hash] = int(ip - base_ip - 3) + input_bytes = binary.LittleEndian.Uint64(input[ip-2:]) + cur_hash = hashBytesAtOffset(input_bytes, 2, shift, min_match) + prev_hash = hashBytesAtOffset(input_bytes, 0, shift, min_match) + table[prev_hash] = int(ip - base_ip - 2) + prev_hash = hashBytesAtOffset(input_bytes, 1, shift, min_match) + table[prev_hash] = int(ip - base_ip - 1) + } + + candidate = base_ip + table[cur_hash] + table[cur_hash] = int(ip - base_ip) + } + } + + for ip-candidate <= maxDistance_compress_fragment && isMatch1(input[ip:], base_ip_ptr[candidate-base_ip:], min_match) { + var base int = ip + /* We have a 6-byte match at ip, and no need to emit any + literal bytes prior to ip. */ + + var matched uint = min_match + findMatchLengthWithLimit(base_ip_ptr[uint(candidate-base_ip)+min_match:], input[uint(ip)+min_match:], uint(ip_end-ip)-min_match) + ip += int(matched) + last_distance = int(base - candidate) /* > 0 */ + emitCopyLen(matched, commands) + emitDistance(uint32(last_distance), commands) + + next_emit = ip + if ip >= ip_limit { + goto emit_remainder + } + { + var input_bytes uint64 + var cur_hash uint32 + /* We could immediately start working at ip now, but to improve + compression we first update "table" with the hashes of some + positions within the last copy. */ + + var prev_hash uint32 + if min_match == 4 { + input_bytes = binary.LittleEndian.Uint64(input[ip-3:]) + cur_hash = hashBytesAtOffset(input_bytes, 3, shift, min_match) + prev_hash = hashBytesAtOffset(input_bytes, 0, shift, min_match) + table[prev_hash] = int(ip - base_ip - 3) + prev_hash = hashBytesAtOffset(input_bytes, 1, shift, min_match) + table[prev_hash] = int(ip - base_ip - 2) + prev_hash = hashBytesAtOffset(input_bytes, 2, shift, min_match) + table[prev_hash] = int(ip - base_ip - 1) + } else { + input_bytes = binary.LittleEndian.Uint64(input[ip-5:]) + prev_hash = hashBytesAtOffset(input_bytes, 0, shift, min_match) + table[prev_hash] = int(ip - base_ip - 5) + prev_hash = hashBytesAtOffset(input_bytes, 1, shift, min_match) + table[prev_hash] = int(ip - base_ip - 4) + prev_hash = hashBytesAtOffset(input_bytes, 2, shift, min_match) + table[prev_hash] = int(ip - base_ip - 3) + input_bytes = binary.LittleEndian.Uint64(input[ip-2:]) + cur_hash = hashBytesAtOffset(input_bytes, 2, shift, min_match) + prev_hash = hashBytesAtOffset(input_bytes, 0, shift, min_match) + table[prev_hash] = int(ip - base_ip - 2) + prev_hash = hashBytesAtOffset(input_bytes, 1, shift, min_match) + table[prev_hash] = int(ip - base_ip - 1) + } + + candidate = base_ip + table[cur_hash] + table[cur_hash] = int(ip - base_ip) + } + } + + ip++ + next_hash = hash1(input[ip:], shift, min_match) + } + } + +emit_remainder: + assert(next_emit <= ip_end) + + /* Emit the remaining bytes as literals. */ + if next_emit < ip_end { + var insert uint32 = uint32(ip_end - next_emit) + emitInsertLen(insert, commands) + copy(*literals, input[next_emit:][:insert]) + *literals = (*literals)[insert:] + } +} + +var storeCommands_kNumExtraBits = [128]uint32{ + 0, + 0, + 0, + 0, + 0, + 0, + 1, + 1, + 2, + 2, + 3, + 3, + 4, + 4, + 5, + 5, + 6, + 7, + 8, + 9, + 10, + 12, + 14, + 24, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 1, + 1, + 2, + 2, + 3, + 3, + 4, + 4, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 1, + 1, + 2, + 2, + 3, + 3, + 4, + 4, + 5, + 5, + 6, + 7, + 8, + 9, + 10, + 24, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 1, + 1, + 2, + 2, + 3, + 3, + 4, + 4, + 5, + 5, + 6, + 6, + 7, + 7, + 8, + 8, + 9, + 9, + 10, + 10, + 11, + 11, + 12, + 12, + 13, + 13, + 14, + 14, + 15, + 15, + 16, + 16, + 17, + 17, + 18, + 18, + 19, + 19, + 20, + 20, + 21, + 21, + 22, + 22, + 23, + 23, + 24, + 24, +} +var storeCommands_kInsertOffset = [24]uint32{ + 0, + 1, + 2, + 3, + 4, + 5, + 6, + 8, + 10, + 14, + 18, + 26, + 34, + 50, + 66, + 98, + 130, + 194, + 322, + 578, + 1090, + 2114, + 6210, + 22594, +} + +func storeCommands(literals []byte, num_literals uint, commands []uint32, num_commands uint, storage_ix *uint, storage []byte) { + var lit_depths [256]byte + var lit_bits [256]uint16 + var lit_histo = [256]uint32{0} + var cmd_depths = [128]byte{0} + var cmd_bits = [128]uint16{0} + var cmd_histo = [128]uint32{0} + var i uint + for i = 0; i < num_literals; i++ { + lit_histo[literals[i]]++ + } + + buildAndStoreHuffmanTreeFast(lit_histo[:], num_literals, /* max_bits = */ + 8, lit_depths[:], lit_bits[:], storage_ix, storage) + + for i = 0; i < num_commands; i++ { + var code uint32 = commands[i] & 0xFF + assert(code < 128) + cmd_histo[code]++ + } + + cmd_histo[1] += 1 + cmd_histo[2] += 1 + cmd_histo[64] += 1 + cmd_histo[84] += 1 + buildAndStoreCommandPrefixCode(cmd_histo[:], cmd_depths[:], cmd_bits[:], storage_ix, storage) + + for i = 0; i < num_commands; i++ { + var cmd uint32 = commands[i] + var code uint32 = cmd & 0xFF + var extra uint32 = cmd >> 8 + assert(code < 128) + writeBits(uint(cmd_depths[code]), uint64(cmd_bits[code]), storage_ix, storage) + writeBits(uint(storeCommands_kNumExtraBits[code]), uint64(extra), storage_ix, storage) + if code < 24 { + var insert uint32 = storeCommands_kInsertOffset[code] + extra + var j uint32 + for j = 0; j < insert; j++ { + var lit byte = literals[0] + writeBits(uint(lit_depths[lit]), uint64(lit_bits[lit]), storage_ix, storage) + literals = literals[1:] + } + } + } +} + +/* Acceptable loss for uncompressible speedup is 2% */ +const minRatio = 0.98 + +const sampleRate = 43 + +func shouldCompress(input []byte, input_size uint, num_literals uint) bool { + var corpus_size float64 = float64(input_size) + if float64(num_literals) < minRatio*corpus_size { + return true + } else { + var literal_histo = [256]uint32{0} + var max_total_bit_cost float64 = corpus_size * 8 * minRatio / sampleRate + var i uint + for i = 0; i < input_size; i += sampleRate { + literal_histo[input[i]]++ + } + + return bitsEntropy(literal_histo[:], 256) < max_total_bit_cost + } +} + +func rewindBitPosition(new_storage_ix uint, storage_ix *uint, storage []byte) { + var bitpos uint = new_storage_ix & 7 + var mask uint = (1 << bitpos) - 1 + storage[new_storage_ix>>3] &= byte(mask) + *storage_ix = new_storage_ix +} + +func emitUncompressedMetaBlock(input []byte, input_size uint, storage_ix *uint, storage []byte) { + storeMetaBlockHeader(input_size, true, storage_ix, storage) + *storage_ix = (*storage_ix + 7) &^ 7 + copy(storage[*storage_ix>>3:], input[:input_size]) + *storage_ix += input_size << 3 + storage[*storage_ix>>3] = 0 +} + +func compressFragmentTwoPassImpl(input []byte, input_size uint, is_last bool, command_buf []uint32, literal_buf []byte, table []int, table_bits uint, min_match uint, storage_ix *uint, storage []byte) { + /* Save the start of the first block for position and distance computations. + */ + var base_ip []byte = input + + for input_size > 0 { + var block_size uint = brotli_min_size_t(input_size, kCompressFragmentTwoPassBlockSize) + var commands []uint32 = command_buf + var literals []byte = literal_buf + var num_literals uint + createCommands(input, block_size, input_size, base_ip, table, table_bits, min_match, &literals, &commands) + num_literals = uint(-cap(literals) + cap(literal_buf)) + if shouldCompress(input, block_size, num_literals) { + var num_commands uint = uint(-cap(commands) + cap(command_buf)) + storeMetaBlockHeader(block_size, false, storage_ix, storage) + + /* No block splits, no contexts. */ + writeBits(13, 0, storage_ix, storage) + + storeCommands(literal_buf, num_literals, command_buf, num_commands, storage_ix, storage) + } else { + /* Since we did not find many backward references and the entropy of + the data is close to 8 bits, we can simply emit an uncompressed block. + This makes compression speed of uncompressible data about 3x faster. */ + emitUncompressedMetaBlock(input, block_size, storage_ix, storage) + } + + input = input[block_size:] + input_size -= block_size + } +} + +/* +Compresses "input" string to the "*storage" buffer as one or more complete + + meta-blocks, and updates the "*storage_ix" bit position. + + If "is_last" is 1, emits an additional empty last meta-block. + + REQUIRES: "input_size" is greater than zero, or "is_last" is 1. + REQUIRES: "input_size" is less or equal to maximal metablock size (1 << 24). + REQUIRES: "command_buf" and "literal_buf" point to at least + kCompressFragmentTwoPassBlockSize long arrays. + REQUIRES: All elements in "table[0..table_size-1]" are initialized to zero. + REQUIRES: "table_size" is a power of two + OUTPUT: maximal copy distance <= |input_size| + OUTPUT: maximal copy distance <= BROTLI_MAX_BACKWARD_LIMIT(18) +*/ +func compressFragmentTwoPass(input []byte, input_size uint, is_last bool, command_buf []uint32, literal_buf []byte, table []int, table_size uint, storage_ix *uint, storage []byte) { + var initial_storage_ix uint = *storage_ix + var table_bits uint = uint(log2FloorNonZero(table_size)) + var min_match uint + if table_bits <= 15 { + min_match = 4 + } else { + min_match = 6 + } + compressFragmentTwoPassImpl(input, input_size, is_last, command_buf, literal_buf, table, table_bits, min_match, storage_ix, storage) + + /* If output is larger than single uncompressed block, rewrite it. */ + if *storage_ix-initial_storage_ix > 31+(input_size<<3) { + rewindBitPosition(initial_storage_ix, storage_ix, storage) + emitUncompressedMetaBlock(input, input_size, storage_ix, storage) + } + + if is_last { + writeBits(1, 1, storage_ix, storage) /* islast */ + writeBits(1, 1, storage_ix, storage) /* isempty */ + *storage_ix = (*storage_ix + 7) &^ 7 + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/constants.go b/backend/vendor/github.com/andybalholm/brotli/constants.go new file mode 100644 index 0000000..a880dff --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/constants.go @@ -0,0 +1,77 @@ +package brotli + +/* Copyright 2016 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Specification: 7.3. Encoding of the context map */ +const contextMapMaxRle = 16 + +/* Specification: 2. Compressed representation overview */ +const maxNumberOfBlockTypes = 256 + +/* Specification: 3.3. Alphabet sizes: insert-and-copy length */ +const numLiteralSymbols = 256 + +const numCommandSymbols = 704 + +const numBlockLenSymbols = 26 + +const maxContextMapSymbols = (maxNumberOfBlockTypes + contextMapMaxRle) + +const maxBlockTypeSymbols = (maxNumberOfBlockTypes + 2) + +/* Specification: 3.5. Complex prefix codes */ +const repeatPreviousCodeLength = 16 + +const repeatZeroCodeLength = 17 + +const codeLengthCodes = (repeatZeroCodeLength + 1) + +/* "code length of 8 is repeated" */ +const initialRepeatedCodeLength = 8 + +/* "Large Window Brotli" */ +const largeMaxDistanceBits = 62 + +const largeMinWbits = 10 + +const largeMaxWbits = 30 + +/* Specification: 4. Encoding of distances */ +const numDistanceShortCodes = 16 + +const maxNpostfix = 3 + +const maxNdirect = 120 + +const maxDistanceBits = 24 + +func distanceAlphabetSize(NPOSTFIX uint, NDIRECT uint, MAXNBITS uint) uint { + return numDistanceShortCodes + NDIRECT + uint(MAXNBITS<<(NPOSTFIX+1)) +} + +/* numDistanceSymbols == 1128 */ +const numDistanceSymbols = 1128 + +const maxDistance = 0x3FFFFFC + +const maxAllowedDistance = 0x7FFFFFFC + +/* 7.1. Context modes and context ID lookup for literals */ +/* "context IDs for literals are in the range of 0..63" */ +const literalContextBits = 6 + +/* 7.2. Context ID for distances */ +const distanceContextBits = 2 + +/* 9.1. Format of the Stream Header */ +/* Number of slack bytes for window size. Don't confuse + with BROTLI_NUM_DISTANCE_SHORT_CODES. */ +const windowGap = 16 + +func maxBackwardLimit(W uint) uint { + return (uint(1) << W) - windowGap +} diff --git a/backend/vendor/github.com/andybalholm/brotli/context.go b/backend/vendor/github.com/andybalholm/brotli/context.go new file mode 100644 index 0000000..884ff8a --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/context.go @@ -0,0 +1,2176 @@ +package brotli + +/* Lookup table to map the previous two bytes to a context id. + +There are four different context modeling modes defined here: + contextLSB6: context id is the least significant 6 bits of the last byte, + contextMSB6: context id is the most significant 6 bits of the last byte, + contextUTF8: second-order context model tuned for UTF8-encoded text, + contextSigned: second-order context model tuned for signed integers. + +If |p1| and |p2| are the previous two bytes, and |mode| is current context +mode, we calculate the context as: + + context = ContextLut(mode)[p1] | ContextLut(mode)[p2 + 256]. + +For contextUTF8 mode, if the previous two bytes are ASCII characters +(i.e. < 128), this will be equivalent to + + context = 4 * context1(p1) + context2(p2), + +where context1 is based on the previous byte in the following way: + + 0 : non-ASCII control + 1 : \t, \n, \r + 2 : space + 3 : other punctuation + 4 : " ' + 5 : % + 6 : ( < [ { + 7 : ) > ] } + 8 : , ; : + 9 : . + 10 : = + 11 : number + 12 : upper-case vowel + 13 : upper-case consonant + 14 : lower-case vowel + 15 : lower-case consonant + +and context2 is based on the second last byte: + + 0 : control, space + 1 : punctuation + 2 : upper-case letter, number + 3 : lower-case letter + +If the last byte is ASCII, and the second last byte is not (in a valid UTF8 +stream it will be a continuation byte, value between 128 and 191), the +context is the same as if the second last byte was an ASCII control or space. + +If the last byte is a UTF8 lead byte (value >= 192), then the next byte will +be a continuation byte and the context id is 2 or 3 depending on the LSB of +the last byte and to a lesser extent on the second last byte if it is ASCII. + +If the last byte is a UTF8 continuation byte, the second last byte can be: + - continuation byte: the next byte is probably ASCII or lead byte (assuming + 4-byte UTF8 characters are rare) and the context id is 0 or 1. + - lead byte (192 - 207): next byte is ASCII or lead byte, context is 0 or 1 + - lead byte (208 - 255): next byte is continuation byte, context is 2 or 3 + +The possible value combinations of the previous two bytes, the range of +context ids and the type of the next byte is summarized in the table below: + +|--------\-----------------------------------------------------------------| +| \ Last byte | +| Second \---------------------------------------------------------------| +| last byte \ ASCII | cont. byte | lead byte | +| \ (0-127) | (128-191) | (192-) | +|=============|===================|=====================|==================| +| ASCII | next: ASCII/lead | not valid | next: cont. | +| (0-127) | context: 4 - 63 | | context: 2 - 3 | +|-------------|-------------------|---------------------|------------------| +| cont. byte | next: ASCII/lead | next: ASCII/lead | next: cont. | +| (128-191) | context: 4 - 63 | context: 0 - 1 | context: 2 - 3 | +|-------------|-------------------|---------------------|------------------| +| lead byte | not valid | next: ASCII/lead | not valid | +| (192-207) | | context: 0 - 1 | | +|-------------|-------------------|---------------------|------------------| +| lead byte | not valid | next: cont. | not valid | +| (208-) | | context: 2 - 3 | | +|-------------|-------------------|---------------------|------------------| +*/ + +const ( + contextLSB6 = 0 + contextMSB6 = 1 + contextUTF8 = 2 + contextSigned = 3 +) + +/* Common context lookup table for all context modes. */ +var kContextLookup = [2048]byte{ + /* CONTEXT_LSB6, last byte. */ + 0, + 1, + 2, + 3, + 4, + 5, + 6, + 7, + 8, + 9, + 10, + 11, + 12, + 13, + 14, + 15, + 16, + 17, + 18, + 19, + 20, + 21, + 22, + 23, + 24, + 25, + 26, + 27, + 28, + 29, + 30, + 31, + 32, + 33, + 34, + 35, + 36, + 37, + 38, + 39, + 40, + 41, + 42, + 43, + 44, + 45, + 46, + 47, + 48, + 49, + 50, + 51, + 52, + 53, + 54, + 55, + 56, + 57, + 58, + 59, + 60, + 61, + 62, + 63, + 0, + 1, + 2, + 3, + 4, + 5, + 6, + 7, + 8, + 9, + 10, + 11, + 12, + 13, + 14, + 15, + 16, + 17, + 18, + 19, + 20, + 21, + 22, + 23, + 24, + 25, + 26, + 27, + 28, + 29, + 30, + 31, + 32, + 33, + 34, + 35, + 36, + 37, + 38, + 39, + 40, + 41, + 42, + 43, + 44, + 45, + 46, + 47, + 48, + 49, + 50, + 51, + 52, + 53, + 54, + 55, + 56, + 57, + 58, + 59, + 60, + 61, + 62, + 63, + 0, + 1, + 2, + 3, + 4, + 5, + 6, + 7, + 8, + 9, + 10, + 11, + 12, + 13, + 14, + 15, + 16, + 17, + 18, + 19, + 20, + 21, + 22, + 23, + 24, + 25, + 26, + 27, + 28, + 29, + 30, + 31, + 32, + 33, + 34, + 35, + 36, + 37, + 38, + 39, + 40, + 41, + 42, + 43, + 44, + 45, + 46, + 47, + 48, + 49, + 50, + 51, + 52, + 53, + 54, + 55, + 56, + 57, + 58, + 59, + 60, + 61, + 62, + 63, + 0, + 1, + 2, + 3, + 4, + 5, + 6, + 7, + 8, + 9, + 10, + 11, + 12, + 13, + 14, + 15, + 16, + 17, + 18, + 19, + 20, + 21, + 22, + 23, + 24, + 25, + 26, + 27, + 28, + 29, + 30, + 31, + 32, + 33, + 34, + 35, + 36, + 37, + 38, + 39, + 40, + 41, + 42, + 43, + 44, + 45, + 46, + 47, + 48, + 49, + 50, + 51, + 52, + 53, + 54, + 55, + 56, + 57, + 58, + 59, + 60, + 61, + 62, + 63, + + /* CONTEXT_LSB6, second last byte, */ + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + + /* CONTEXT_MSB6, last byte. */ + 0, + 0, + 0, + 0, + 1, + 1, + 1, + 1, + 2, + 2, + 2, + 2, + 3, + 3, + 3, + 3, + 4, + 4, + 4, + 4, + 5, + 5, + 5, + 5, + 6, + 6, + 6, + 6, + 7, + 7, + 7, + 7, + 8, + 8, + 8, + 8, + 9, + 9, + 9, + 9, + 10, + 10, + 10, + 10, + 11, + 11, + 11, + 11, + 12, + 12, + 12, + 12, + 13, + 13, + 13, + 13, + 14, + 14, + 14, + 14, + 15, + 15, + 15, + 15, + 16, + 16, + 16, + 16, + 17, + 17, + 17, + 17, + 18, + 18, + 18, + 18, + 19, + 19, + 19, + 19, + 20, + 20, + 20, + 20, + 21, + 21, + 21, + 21, + 22, + 22, + 22, + 22, + 23, + 23, + 23, + 23, + 24, + 24, + 24, + 24, + 25, + 25, + 25, + 25, + 26, + 26, + 26, + 26, + 27, + 27, + 27, + 27, + 28, + 28, + 28, + 28, + 29, + 29, + 29, + 29, + 30, + 30, + 30, + 30, + 31, + 31, + 31, + 31, + 32, + 32, + 32, + 32, + 33, + 33, + 33, + 33, + 34, + 34, + 34, + 34, + 35, + 35, + 35, + 35, + 36, + 36, + 36, + 36, + 37, + 37, + 37, + 37, + 38, + 38, + 38, + 38, + 39, + 39, + 39, + 39, + 40, + 40, + 40, + 40, + 41, + 41, + 41, + 41, + 42, + 42, + 42, + 42, + 43, + 43, + 43, + 43, + 44, + 44, + 44, + 44, + 45, + 45, + 45, + 45, + 46, + 46, + 46, + 46, + 47, + 47, + 47, + 47, + 48, + 48, + 48, + 48, + 49, + 49, + 49, + 49, + 50, + 50, + 50, + 50, + 51, + 51, + 51, + 51, + 52, + 52, + 52, + 52, + 53, + 53, + 53, + 53, + 54, + 54, + 54, + 54, + 55, + 55, + 55, + 55, + 56, + 56, + 56, + 56, + 57, + 57, + 57, + 57, + 58, + 58, + 58, + 58, + 59, + 59, + 59, + 59, + 60, + 60, + 60, + 60, + 61, + 61, + 61, + 61, + 62, + 62, + 62, + 62, + 63, + 63, + 63, + 63, + + /* CONTEXT_MSB6, second last byte, */ + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + + /* CONTEXT_UTF8, last byte. */ + /* ASCII range. */ + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 4, + 4, + 0, + 0, + 4, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 8, + 12, + 16, + 12, + 12, + 20, + 12, + 16, + 24, + 28, + 12, + 12, + 32, + 12, + 36, + 12, + 44, + 44, + 44, + 44, + 44, + 44, + 44, + 44, + 44, + 44, + 32, + 32, + 24, + 40, + 28, + 12, + 12, + 48, + 52, + 52, + 52, + 48, + 52, + 52, + 52, + 48, + 52, + 52, + 52, + 52, + 52, + 48, + 52, + 52, + 52, + 52, + 52, + 48, + 52, + 52, + 52, + 52, + 52, + 24, + 12, + 28, + 12, + 12, + 12, + 56, + 60, + 60, + 60, + 56, + 60, + 60, + 60, + 56, + 60, + 60, + 60, + 60, + 60, + 56, + 60, + 60, + 60, + 60, + 60, + 56, + 60, + 60, + 60, + 60, + 60, + 24, + 12, + 28, + 12, + 0, + + /* UTF8 continuation byte range. */ + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + 0, + 1, + + /* UTF8 lead byte range. */ + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + 2, + 3, + + /* CONTEXT_UTF8 second last byte. */ + /* ASCII range. */ + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 1, + 1, + 1, + 1, + 1, + 1, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 1, + 1, + 1, + 1, + 0, + + /* UTF8 continuation byte range. */ + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + + /* UTF8 lead byte range. */ + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + + /* CONTEXT_SIGNED, last byte, same as the above values shifted by 3 bits. */ + 0, + 8, + 8, + 8, + 8, + 8, + 8, + 8, + 8, + 8, + 8, + 8, + 8, + 8, + 8, + 8, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 16, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 32, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 40, + 48, + 48, + 48, + 48, + 48, + 48, + 48, + 48, + 48, + 48, + 48, + 48, + 48, + 48, + 48, + 56, + + /* CONTEXT_SIGNED, second last byte. */ + 0, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 1, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 2, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 3, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 4, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 5, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 7, +} + +type contextLUT []byte + +func getContextLUT(mode int) contextLUT { + return kContextLookup[mode<<9:] +} + +func getContext(p1 byte, p2 byte, lut contextLUT) byte { + return lut[p1] | lut[256+int(p2)] +} diff --git a/backend/vendor/github.com/andybalholm/brotli/decode.go b/backend/vendor/github.com/andybalholm/brotli/decode.go new file mode 100644 index 0000000..9d9513b --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/decode.go @@ -0,0 +1,2581 @@ +package brotli + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +const ( + decoderResultError = 0 + decoderResultSuccess = 1 + decoderResultNeedsMoreInput = 2 + decoderResultNeedsMoreOutput = 3 +) + +/** + * Error code for detailed logging / production debugging. + * + * See ::BrotliDecoderGetErrorCode and ::BROTLI_LAST_ERROR_CODE. + */ +const ( + decoderNoError = 0 + decoderSuccess = 1 + decoderNeedsMoreInput = 2 + decoderNeedsMoreOutput = 3 + decoderErrorFormatExuberantNibble = -1 + decoderErrorFormatReserved = -2 + decoderErrorFormatExuberantMetaNibble = -3 + decoderErrorFormatSimpleHuffmanAlphabet = -4 + decoderErrorFormatSimpleHuffmanSame = -5 + decoderErrorFormatClSpace = -6 + decoderErrorFormatHuffmanSpace = -7 + decoderErrorFormatContextMapRepeat = -8 + decoderErrorFormatBlockLength1 = -9 + decoderErrorFormatBlockLength2 = -10 + decoderErrorFormatTransform = -11 + decoderErrorFormatDictionary = -12 + decoderErrorFormatWindowBits = -13 + decoderErrorFormatPadding1 = -14 + decoderErrorFormatPadding2 = -15 + decoderErrorFormatDistance = -16 + decoderErrorDictionaryNotSet = -19 + decoderErrorInvalidArguments = -20 + decoderErrorAllocContextModes = -21 + decoderErrorAllocTreeGroups = -22 + decoderErrorAllocContextMap = -25 + decoderErrorAllocRingBuffer1 = -26 + decoderErrorAllocRingBuffer2 = -27 + decoderErrorAllocBlockTypeTrees = -30 + decoderErrorUnreachable = -31 +) + +const huffmanTableBits = 8 + +const huffmanTableMask = 0xFF + +/* We need the slack region for the following reasons: + - doing up to two 16-byte copies for fast backward copying + - inserting transformed dictionary word (5 prefix + 24 base + 8 suffix) */ +const kRingBufferWriteAheadSlack uint32 = 42 + +var kCodeLengthCodeOrder = [codeLengthCodes]byte{1, 2, 3, 4, 0, 5, 17, 6, 16, 7, 8, 9, 10, 11, 12, 13, 14, 15} + +/* Static prefix code for the complex code length code lengths. */ +var kCodeLengthPrefixLength = [16]byte{2, 2, 2, 3, 2, 2, 2, 4, 2, 2, 2, 3, 2, 2, 2, 4} + +var kCodeLengthPrefixValue = [16]byte{0, 4, 3, 2, 0, 4, 3, 1, 0, 4, 3, 2, 0, 4, 3, 5} + +/* Saves error code and converts it to BrotliDecoderResult. */ +func saveErrorCode(s *Reader, e int) int { + s.error_code = int(e) + switch e { + case decoderSuccess: + return decoderResultSuccess + + case decoderNeedsMoreInput: + return decoderResultNeedsMoreInput + + case decoderNeedsMoreOutput: + return decoderResultNeedsMoreOutput + + default: + return decoderResultError + } +} + +/* Decodes WBITS by reading 1 - 7 bits, or 0x11 for "Large Window Brotli". + Precondition: bit-reader accumulator has at least 8 bits. */ +func decodeWindowBits(s *Reader, br *bitReader) int { + var n uint32 + var large_window bool = s.large_window + s.large_window = false + takeBits(br, 1, &n) + if n == 0 { + s.window_bits = 16 + return decoderSuccess + } + + takeBits(br, 3, &n) + if n != 0 { + s.window_bits = 17 + n + return decoderSuccess + } + + takeBits(br, 3, &n) + if n == 1 { + if large_window { + takeBits(br, 1, &n) + if n == 1 { + return decoderErrorFormatWindowBits + } + + s.large_window = true + return decoderSuccess + } else { + return decoderErrorFormatWindowBits + } + } + + if n != 0 { + s.window_bits = 8 + n + return decoderSuccess + } + + s.window_bits = 17 + return decoderSuccess +} + +/* Decodes a number in the range [0..255], by reading 1 - 11 bits. */ +func decodeVarLenUint8(s *Reader, br *bitReader, value *uint32) int { + var bits uint32 + switch s.substate_decode_uint8 { + case stateDecodeUint8None: + if !safeReadBits(br, 1, &bits) { + return decoderNeedsMoreInput + } + + if bits == 0 { + *value = 0 + return decoderSuccess + } + fallthrough + + /* Fall through. */ + case stateDecodeUint8Short: + if !safeReadBits(br, 3, &bits) { + s.substate_decode_uint8 = stateDecodeUint8Short + return decoderNeedsMoreInput + } + + if bits == 0 { + *value = 1 + s.substate_decode_uint8 = stateDecodeUint8None + return decoderSuccess + } + + /* Use output value as a temporary storage. It MUST be persisted. */ + *value = bits + fallthrough + + /* Fall through. */ + case stateDecodeUint8Long: + if !safeReadBits(br, *value, &bits) { + s.substate_decode_uint8 = stateDecodeUint8Long + return decoderNeedsMoreInput + } + + *value = (1 << *value) + bits + s.substate_decode_uint8 = stateDecodeUint8None + return decoderSuccess + + default: + return decoderErrorUnreachable + } +} + +/* Decodes a metablock length and flags by reading 2 - 31 bits. */ +func decodeMetaBlockLength(s *Reader, br *bitReader) int { + var bits uint32 + var i int + for { + switch s.substate_metablock_header { + case stateMetablockHeaderNone: + if !safeReadBits(br, 1, &bits) { + return decoderNeedsMoreInput + } + + if bits != 0 { + s.is_last_metablock = 1 + } else { + s.is_last_metablock = 0 + } + s.meta_block_remaining_len = 0 + s.is_uncompressed = 0 + s.is_metadata = 0 + if s.is_last_metablock == 0 { + s.substate_metablock_header = stateMetablockHeaderNibbles + break + } + + s.substate_metablock_header = stateMetablockHeaderEmpty + fallthrough + + /* Fall through. */ + case stateMetablockHeaderEmpty: + if !safeReadBits(br, 1, &bits) { + return decoderNeedsMoreInput + } + + if bits != 0 { + s.substate_metablock_header = stateMetablockHeaderNone + return decoderSuccess + } + + s.substate_metablock_header = stateMetablockHeaderNibbles + fallthrough + + /* Fall through. */ + case stateMetablockHeaderNibbles: + if !safeReadBits(br, 2, &bits) { + return decoderNeedsMoreInput + } + + s.size_nibbles = uint(byte(bits + 4)) + s.loop_counter = 0 + if bits == 3 { + s.is_metadata = 1 + s.substate_metablock_header = stateMetablockHeaderReserved + break + } + + s.substate_metablock_header = stateMetablockHeaderSize + fallthrough + + /* Fall through. */ + case stateMetablockHeaderSize: + i = s.loop_counter + + for ; i < int(s.size_nibbles); i++ { + if !safeReadBits(br, 4, &bits) { + s.loop_counter = i + return decoderNeedsMoreInput + } + + if uint(i+1) == s.size_nibbles && s.size_nibbles > 4 && bits == 0 { + return decoderErrorFormatExuberantNibble + } + + s.meta_block_remaining_len |= int(bits << uint(i*4)) + } + + s.substate_metablock_header = stateMetablockHeaderUncompressed + fallthrough + + /* Fall through. */ + case stateMetablockHeaderUncompressed: + if s.is_last_metablock == 0 { + if !safeReadBits(br, 1, &bits) { + return decoderNeedsMoreInput + } + + if bits != 0 { + s.is_uncompressed = 1 + } else { + s.is_uncompressed = 0 + } + } + + s.meta_block_remaining_len++ + s.substate_metablock_header = stateMetablockHeaderNone + return decoderSuccess + + case stateMetablockHeaderReserved: + if !safeReadBits(br, 1, &bits) { + return decoderNeedsMoreInput + } + + if bits != 0 { + return decoderErrorFormatReserved + } + + s.substate_metablock_header = stateMetablockHeaderBytes + fallthrough + + /* Fall through. */ + case stateMetablockHeaderBytes: + if !safeReadBits(br, 2, &bits) { + return decoderNeedsMoreInput + } + + if bits == 0 { + s.substate_metablock_header = stateMetablockHeaderNone + return decoderSuccess + } + + s.size_nibbles = uint(byte(bits)) + s.substate_metablock_header = stateMetablockHeaderMetadata + fallthrough + + /* Fall through. */ + case stateMetablockHeaderMetadata: + i = s.loop_counter + + for ; i < int(s.size_nibbles); i++ { + if !safeReadBits(br, 8, &bits) { + s.loop_counter = i + return decoderNeedsMoreInput + } + + if uint(i+1) == s.size_nibbles && s.size_nibbles > 1 && bits == 0 { + return decoderErrorFormatExuberantMetaNibble + } + + s.meta_block_remaining_len |= int(bits << uint(i*8)) + } + + s.meta_block_remaining_len++ + s.substate_metablock_header = stateMetablockHeaderNone + return decoderSuccess + + default: + return decoderErrorUnreachable + } + } +} + +/* Decodes the Huffman code. + This method doesn't read data from the bit reader, BUT drops the amount of + bits that correspond to the decoded symbol. + bits MUST contain at least 15 (BROTLI_HUFFMAN_MAX_CODE_LENGTH) valid bits. */ +func decodeSymbol(bits uint32, table []huffmanCode, br *bitReader) uint32 { + table = table[bits&huffmanTableMask:] + if table[0].bits > huffmanTableBits { + var nbits uint32 = uint32(table[0].bits) - huffmanTableBits + dropBits(br, huffmanTableBits) + table = table[uint32(table[0].value)+((bits>>huffmanTableBits)&bitMask(nbits)):] + } + + dropBits(br, uint32(table[0].bits)) + return uint32(table[0].value) +} + +/* Reads and decodes the next Huffman code from bit-stream. + This method peeks 16 bits of input and drops 0 - 15 of them. */ +func readSymbol(table []huffmanCode, br *bitReader) uint32 { + return decodeSymbol(get16BitsUnmasked(br), table, br) +} + +/* Same as DecodeSymbol, but it is known that there is less than 15 bits of + input are currently available. */ +func safeDecodeSymbol(table []huffmanCode, br *bitReader, result *uint32) bool { + var val uint32 + var available_bits uint32 = getAvailableBits(br) + if available_bits == 0 { + if table[0].bits == 0 { + *result = uint32(table[0].value) + return true + } + + return false /* No valid bits at all. */ + } + + val = uint32(getBitsUnmasked(br)) + table = table[val&huffmanTableMask:] + if table[0].bits <= huffmanTableBits { + if uint32(table[0].bits) <= available_bits { + dropBits(br, uint32(table[0].bits)) + *result = uint32(table[0].value) + return true + } else { + return false /* Not enough bits for the first level. */ + } + } + + if available_bits <= huffmanTableBits { + return false /* Not enough bits to move to the second level. */ + } + + /* Speculatively drop HUFFMAN_TABLE_BITS. */ + val = (val & bitMask(uint32(table[0].bits))) >> huffmanTableBits + + available_bits -= huffmanTableBits + table = table[uint32(table[0].value)+val:] + if available_bits < uint32(table[0].bits) { + return false /* Not enough bits for the second level. */ + } + + dropBits(br, huffmanTableBits+uint32(table[0].bits)) + *result = uint32(table[0].value) + return true +} + +func safeReadSymbol(table []huffmanCode, br *bitReader, result *uint32) bool { + var val uint32 + if safeGetBits(br, 15, &val) { + *result = decodeSymbol(val, table, br) + return true + } + + return safeDecodeSymbol(table, br, result) +} + +/* Makes a look-up in first level Huffman table. Peeks 8 bits. */ +func preloadSymbol(safe int, table []huffmanCode, br *bitReader, bits *uint32, value *uint32) { + if safe != 0 { + return + } + + table = table[getBits(br, huffmanTableBits):] + *bits = uint32(table[0].bits) + *value = uint32(table[0].value) +} + +/* Decodes the next Huffman code using data prepared by PreloadSymbol. + Reads 0 - 15 bits. Also peeks 8 following bits. */ +func readPreloadedSymbol(table []huffmanCode, br *bitReader, bits *uint32, value *uint32) uint32 { + var result uint32 = *value + var ext []huffmanCode + if *bits > huffmanTableBits { + var val uint32 = get16BitsUnmasked(br) + ext = table[val&huffmanTableMask:][*value:] + var mask uint32 = bitMask((*bits - huffmanTableBits)) + dropBits(br, huffmanTableBits) + ext = ext[(val>>huffmanTableBits)&mask:] + dropBits(br, uint32(ext[0].bits)) + result = uint32(ext[0].value) + } else { + dropBits(br, *bits) + } + + preloadSymbol(0, table, br, bits, value) + return result +} + +func log2Floor(x uint32) uint32 { + var result uint32 = 0 + for x != 0 { + x >>= 1 + result++ + } + + return result +} + +/* Reads (s->symbol + 1) symbols. + Totally 1..4 symbols are read, 1..11 bits each. + The list of symbols MUST NOT contain duplicates. */ +func readSimpleHuffmanSymbols(alphabet_size uint32, max_symbol uint32, s *Reader) int { + var br *bitReader = &s.br + var max_bits uint32 = log2Floor(alphabet_size - 1) + var i uint32 = s.sub_loop_counter + /* max_bits == 1..11; symbol == 0..3; 1..44 bits will be read. */ + + var num_symbols uint32 = s.symbol + for i <= num_symbols { + var v uint32 + if !safeReadBits(br, max_bits, &v) { + s.sub_loop_counter = i + s.substate_huffman = stateHuffmanSimpleRead + return decoderNeedsMoreInput + } + + if v >= max_symbol { + return decoderErrorFormatSimpleHuffmanAlphabet + } + + s.symbols_lists_array[i] = uint16(v) + i++ + } + + for i = 0; i < num_symbols; i++ { + var k uint32 = i + 1 + for ; k <= num_symbols; k++ { + if s.symbols_lists_array[i] == s.symbols_lists_array[k] { + return decoderErrorFormatSimpleHuffmanSame + } + } + } + + return decoderSuccess +} + +/* Process single decoded symbol code length: + A) reset the repeat variable + B) remember code length (if it is not 0) + C) extend corresponding index-chain + D) reduce the Huffman space + E) update the histogram */ +func processSingleCodeLength(code_len uint32, symbol *uint32, repeat *uint32, space *uint32, prev_code_len *uint32, symbol_lists symbolList, code_length_histo []uint16, next_symbol []int) { + *repeat = 0 + if code_len != 0 { /* code_len == 1..15 */ + symbolListPut(symbol_lists, next_symbol[code_len], uint16(*symbol)) + next_symbol[code_len] = int(*symbol) + *prev_code_len = code_len + *space -= 32768 >> code_len + code_length_histo[code_len]++ + } + + (*symbol)++ +} + +/* Process repeated symbol code length. + A) Check if it is the extension of previous repeat sequence; if the decoded + value is not BROTLI_REPEAT_PREVIOUS_CODE_LENGTH, then it is a new + symbol-skip + B) Update repeat variable + C) Check if operation is feasible (fits alphabet) + D) For each symbol do the same operations as in ProcessSingleCodeLength + + PRECONDITION: code_len == BROTLI_REPEAT_PREVIOUS_CODE_LENGTH or + code_len == BROTLI_REPEAT_ZERO_CODE_LENGTH */ +func processRepeatedCodeLength(code_len uint32, repeat_delta uint32, alphabet_size uint32, symbol *uint32, repeat *uint32, space *uint32, prev_code_len *uint32, repeat_code_len *uint32, symbol_lists symbolList, code_length_histo []uint16, next_symbol []int) { + var old_repeat uint32 /* for BROTLI_REPEAT_ZERO_CODE_LENGTH */ /* for BROTLI_REPEAT_ZERO_CODE_LENGTH */ + var extra_bits uint32 = 3 + var new_len uint32 = 0 + if code_len == repeatPreviousCodeLength { + new_len = *prev_code_len + extra_bits = 2 + } + + if *repeat_code_len != new_len { + *repeat = 0 + *repeat_code_len = new_len + } + + old_repeat = *repeat + if *repeat > 0 { + *repeat -= 2 + *repeat <<= extra_bits + } + + *repeat += repeat_delta + 3 + repeat_delta = *repeat - old_repeat + if *symbol+repeat_delta > alphabet_size { + *symbol = alphabet_size + *space = 0xFFFFF + return + } + + if *repeat_code_len != 0 { + var last uint = uint(*symbol + repeat_delta) + var next int = next_symbol[*repeat_code_len] + for { + symbolListPut(symbol_lists, next, uint16(*symbol)) + next = int(*symbol) + (*symbol)++ + if (*symbol) == uint32(last) { + break + } + } + + next_symbol[*repeat_code_len] = next + *space -= repeat_delta << (15 - *repeat_code_len) + code_length_histo[*repeat_code_len] = uint16(uint32(code_length_histo[*repeat_code_len]) + repeat_delta) + } else { + *symbol += repeat_delta + } +} + +/* Reads and decodes symbol codelengths. */ +func readSymbolCodeLengths(alphabet_size uint32, s *Reader) int { + var br *bitReader = &s.br + var symbol uint32 = s.symbol + var repeat uint32 = s.repeat + var space uint32 = s.space + var prev_code_len uint32 = s.prev_code_len + var repeat_code_len uint32 = s.repeat_code_len + var symbol_lists symbolList = s.symbol_lists + var code_length_histo []uint16 = s.code_length_histo[:] + var next_symbol []int = s.next_symbol[:] + if !warmupBitReader(br) { + return decoderNeedsMoreInput + } + var p []huffmanCode + for symbol < alphabet_size && space > 0 { + p = s.table[:] + var code_len uint32 + if !checkInputAmount(br, shortFillBitWindowRead) { + s.symbol = symbol + s.repeat = repeat + s.prev_code_len = prev_code_len + s.repeat_code_len = repeat_code_len + s.space = space + return decoderNeedsMoreInput + } + + fillBitWindow16(br) + p = p[getBitsUnmasked(br)&uint64(bitMask(huffmanMaxCodeLengthCodeLength)):] + dropBits(br, uint32(p[0].bits)) /* Use 1..5 bits. */ + code_len = uint32(p[0].value) /* code_len == 0..17 */ + if code_len < repeatPreviousCodeLength { + processSingleCodeLength(code_len, &symbol, &repeat, &space, &prev_code_len, symbol_lists, code_length_histo, next_symbol) /* code_len == 16..17, extra_bits == 2..3 */ + } else { + var extra_bits uint32 + if code_len == repeatPreviousCodeLength { + extra_bits = 2 + } else { + extra_bits = 3 + } + var repeat_delta uint32 = uint32(getBitsUnmasked(br)) & bitMask(extra_bits) + dropBits(br, extra_bits) + processRepeatedCodeLength(code_len, repeat_delta, alphabet_size, &symbol, &repeat, &space, &prev_code_len, &repeat_code_len, symbol_lists, code_length_histo, next_symbol) + } + } + + s.space = space + return decoderSuccess +} + +func safeReadSymbolCodeLengths(alphabet_size uint32, s *Reader) int { + var br *bitReader = &s.br + var get_byte bool = false + var p []huffmanCode + for s.symbol < alphabet_size && s.space > 0 { + p = s.table[:] + var code_len uint32 + var available_bits uint32 + var bits uint32 = 0 + if get_byte && !pullByte(br) { + return decoderNeedsMoreInput + } + get_byte = false + available_bits = getAvailableBits(br) + if available_bits != 0 { + bits = uint32(getBitsUnmasked(br)) + } + + p = p[bits&bitMask(huffmanMaxCodeLengthCodeLength):] + if uint32(p[0].bits) > available_bits { + get_byte = true + continue + } + + code_len = uint32(p[0].value) /* code_len == 0..17 */ + if code_len < repeatPreviousCodeLength { + dropBits(br, uint32(p[0].bits)) + processSingleCodeLength(code_len, &s.symbol, &s.repeat, &s.space, &s.prev_code_len, s.symbol_lists, s.code_length_histo[:], s.next_symbol[:]) /* code_len == 16..17, extra_bits == 2..3 */ + } else { + var extra_bits uint32 = code_len - 14 + var repeat_delta uint32 = (bits >> p[0].bits) & bitMask(extra_bits) + if available_bits < uint32(p[0].bits)+extra_bits { + get_byte = true + continue + } + + dropBits(br, uint32(p[0].bits)+extra_bits) + processRepeatedCodeLength(code_len, repeat_delta, alphabet_size, &s.symbol, &s.repeat, &s.space, &s.prev_code_len, &s.repeat_code_len, s.symbol_lists, s.code_length_histo[:], s.next_symbol[:]) + } + } + + return decoderSuccess +} + +/* Reads and decodes 15..18 codes using static prefix code. + Each code is 2..4 bits long. In total 30..72 bits are used. */ +func readCodeLengthCodeLengths(s *Reader) int { + var br *bitReader = &s.br + var num_codes uint32 = s.repeat + var space uint32 = s.space + var i uint32 = s.sub_loop_counter + for ; i < codeLengthCodes; i++ { + var code_len_idx byte = kCodeLengthCodeOrder[i] + var ix uint32 + var v uint32 + if !safeGetBits(br, 4, &ix) { + var available_bits uint32 = getAvailableBits(br) + if available_bits != 0 { + ix = uint32(getBitsUnmasked(br) & 0xF) + } else { + ix = 0 + } + + if uint32(kCodeLengthPrefixLength[ix]) > available_bits { + s.sub_loop_counter = i + s.repeat = num_codes + s.space = space + s.substate_huffman = stateHuffmanComplex + return decoderNeedsMoreInput + } + } + + v = uint32(kCodeLengthPrefixValue[ix]) + dropBits(br, uint32(kCodeLengthPrefixLength[ix])) + s.code_length_code_lengths[code_len_idx] = byte(v) + if v != 0 { + space = space - (32 >> v) + num_codes++ + s.code_length_histo[v]++ + if space-1 >= 32 { + /* space is 0 or wrapped around. */ + break + } + } + } + + if num_codes != 1 && space != 0 { + return decoderErrorFormatClSpace + } + + return decoderSuccess +} + +/* Decodes the Huffman tables. + There are 2 scenarios: + A) Huffman code contains only few symbols (1..4). Those symbols are read + directly; their code lengths are defined by the number of symbols. + For this scenario 4 - 49 bits will be read. + + B) 2-phase decoding: + B.1) Small Huffman table is decoded; it is specified with code lengths + encoded with predefined entropy code. 32 - 74 bits are used. + B.2) Decoded table is used to decode code lengths of symbols in resulting + Huffman table. In worst case 3520 bits are read. */ +func readHuffmanCode(alphabet_size uint32, max_symbol uint32, table []huffmanCode, opt_table_size *uint32, s *Reader) int { + var br *bitReader = &s.br + + /* Unnecessary masking, but might be good for safety. */ + alphabet_size &= 0x7FF + + /* State machine. */ + for { + switch s.substate_huffman { + case stateHuffmanNone: + if !safeReadBits(br, 2, &s.sub_loop_counter) { + return decoderNeedsMoreInput + } + + /* The value is used as follows: + 1 for simple code; + 0 for no skipping, 2 skips 2 code lengths, 3 skips 3 code lengths */ + if s.sub_loop_counter != 1 { + s.space = 32 + s.repeat = 0 /* num_codes */ + var i int + for i = 0; i <= huffmanMaxCodeLengthCodeLength; i++ { + s.code_length_histo[i] = 0 + } + + for i = 0; i < codeLengthCodes; i++ { + s.code_length_code_lengths[i] = 0 + } + + s.substate_huffman = stateHuffmanComplex + continue + } + fallthrough + + /* Read symbols, codes & code lengths directly. */ + case stateHuffmanSimpleSize: + if !safeReadBits(br, 2, &s.symbol) { /* num_symbols */ + s.substate_huffman = stateHuffmanSimpleSize + return decoderNeedsMoreInput + } + + s.sub_loop_counter = 0 + fallthrough + + case stateHuffmanSimpleRead: + { + var result int = readSimpleHuffmanSymbols(alphabet_size, max_symbol, s) + if result != decoderSuccess { + return result + } + } + fallthrough + + case stateHuffmanSimpleBuild: + var table_size uint32 + if s.symbol == 3 { + var bits uint32 + if !safeReadBits(br, 1, &bits) { + s.substate_huffman = stateHuffmanSimpleBuild + return decoderNeedsMoreInput + } + + s.symbol += bits + } + + table_size = buildSimpleHuffmanTable(table, huffmanTableBits, s.symbols_lists_array[:], s.symbol) + if opt_table_size != nil { + *opt_table_size = table_size + } + + s.substate_huffman = stateHuffmanNone + return decoderSuccess + + /* Decode Huffman-coded code lengths. */ + case stateHuffmanComplex: + { + var i uint32 + var result int = readCodeLengthCodeLengths(s) + if result != decoderSuccess { + return result + } + + buildCodeLengthsHuffmanTable(s.table[:], s.code_length_code_lengths[:], s.code_length_histo[:]) + for i = 0; i < 16; i++ { + s.code_length_histo[i] = 0 + } + + for i = 0; i <= huffmanMaxCodeLength; i++ { + s.next_symbol[i] = int(i) - (huffmanMaxCodeLength + 1) + symbolListPut(s.symbol_lists, s.next_symbol[i], 0xFFFF) + } + + s.symbol = 0 + s.prev_code_len = initialRepeatedCodeLength + s.repeat = 0 + s.repeat_code_len = 0 + s.space = 32768 + s.substate_huffman = stateHuffmanLengthSymbols + } + fallthrough + + case stateHuffmanLengthSymbols: + var table_size uint32 + var result int = readSymbolCodeLengths(max_symbol, s) + if result == decoderNeedsMoreInput { + result = safeReadSymbolCodeLengths(max_symbol, s) + } + + if result != decoderSuccess { + return result + } + + if s.space != 0 { + return decoderErrorFormatHuffmanSpace + } + + table_size = buildHuffmanTable(table, huffmanTableBits, s.symbol_lists, s.code_length_histo[:]) + if opt_table_size != nil { + *opt_table_size = table_size + } + + s.substate_huffman = stateHuffmanNone + return decoderSuccess + + default: + return decoderErrorUnreachable + } + } +} + +/* Decodes a block length by reading 3..39 bits. */ +func readBlockLength(table []huffmanCode, br *bitReader) uint32 { + var code uint32 + var nbits uint32 + code = readSymbol(table, br) + nbits = kBlockLengthPrefixCode[code].nbits /* nbits == 2..24 */ + return kBlockLengthPrefixCode[code].offset + readBits(br, nbits) +} + +/* WARNING: if state is not BROTLI_STATE_READ_BLOCK_LENGTH_NONE, then + reading can't be continued with ReadBlockLength. */ +func safeReadBlockLength(s *Reader, result *uint32, table []huffmanCode, br *bitReader) bool { + var index uint32 + if s.substate_read_block_length == stateReadBlockLengthNone { + if !safeReadSymbol(table, br, &index) { + return false + } + } else { + index = s.block_length_index + } + { + var bits uint32 /* nbits == 2..24 */ + var nbits uint32 = kBlockLengthPrefixCode[index].nbits + if !safeReadBits(br, nbits, &bits) { + s.block_length_index = index + s.substate_read_block_length = stateReadBlockLengthSuffix + return false + } + + *result = kBlockLengthPrefixCode[index].offset + bits + s.substate_read_block_length = stateReadBlockLengthNone + return true + } +} + +/* Transform: + 1) initialize list L with values 0, 1,... 255 + 2) For each input element X: + 2.1) let Y = L[X] + 2.2) remove X-th element from L + 2.3) prepend Y to L + 2.4) append Y to output + + In most cases max(Y) <= 7, so most of L remains intact. + To reduce the cost of initialization, we reuse L, remember the upper bound + of Y values, and reinitialize only first elements in L. + + Most of input values are 0 and 1. To reduce number of branches, we replace + inner for loop with do-while. */ +func inverseMoveToFrontTransform(v []byte, v_len uint32, state *Reader) { + var mtf [256]byte + var i int + for i = 1; i < 256; i++ { + mtf[i] = byte(i) + } + var mtf_1 byte + + /* Transform the input. */ + for i = 0; uint32(i) < v_len; i++ { + var index int = int(v[i]) + var value byte = mtf[index] + v[i] = value + mtf_1 = value + for index >= 1 { + index-- + mtf[index+1] = mtf[index] + } + + mtf[0] = mtf_1 + } +} + +/* Decodes a series of Huffman table using ReadHuffmanCode function. */ +func huffmanTreeGroupDecode(group *huffmanTreeGroup, s *Reader) int { + if s.substate_tree_group != stateTreeGroupLoop { + s.next = group.codes + s.htree_index = 0 + s.substate_tree_group = stateTreeGroupLoop + } + + for s.htree_index < int(group.num_htrees) { + var table_size uint32 + var result int = readHuffmanCode(uint32(group.alphabet_size), uint32(group.max_symbol), s.next, &table_size, s) + if result != decoderSuccess { + return result + } + group.htrees[s.htree_index] = s.next + s.next = s.next[table_size:] + s.htree_index++ + } + + s.substate_tree_group = stateTreeGroupNone + return decoderSuccess +} + +/* Decodes a context map. + Decoding is done in 4 phases: + 1) Read auxiliary information (6..16 bits) and allocate memory. + In case of trivial context map, decoding is finished at this phase. + 2) Decode Huffman table using ReadHuffmanCode function. + This table will be used for reading context map items. + 3) Read context map items; "0" values could be run-length encoded. + 4) Optionally, apply InverseMoveToFront transform to the resulting map. */ +func decodeContextMap(context_map_size uint32, num_htrees *uint32, context_map_arg *[]byte, s *Reader) int { + var br *bitReader = &s.br + var result int = decoderSuccess + + switch int(s.substate_context_map) { + case stateContextMapNone: + result = decodeVarLenUint8(s, br, num_htrees) + if result != decoderSuccess { + return result + } + + (*num_htrees)++ + s.context_index = 0 + *context_map_arg = make([]byte, uint(context_map_size)) + if *context_map_arg == nil { + return decoderErrorAllocContextMap + } + + if *num_htrees <= 1 { + for i := 0; i < int(context_map_size); i++ { + (*context_map_arg)[i] = 0 + } + return decoderSuccess + } + + s.substate_context_map = stateContextMapReadPrefix + fallthrough + /* Fall through. */ + case stateContextMapReadPrefix: + { + var bits uint32 + + /* In next stage ReadHuffmanCode uses at least 4 bits, so it is safe + to peek 4 bits ahead. */ + if !safeGetBits(br, 5, &bits) { + return decoderNeedsMoreInput + } + + if bits&1 != 0 { /* Use RLE for zeros. */ + s.max_run_length_prefix = (bits >> 1) + 1 + dropBits(br, 5) + } else { + s.max_run_length_prefix = 0 + dropBits(br, 1) + } + + s.substate_context_map = stateContextMapHuffman + } + fallthrough + + /* Fall through. */ + case stateContextMapHuffman: + { + var alphabet_size uint32 = *num_htrees + s.max_run_length_prefix + result = readHuffmanCode(alphabet_size, alphabet_size, s.context_map_table[:], nil, s) + if result != decoderSuccess { + return result + } + s.code = 0xFFFF + s.substate_context_map = stateContextMapDecode + } + fallthrough + + /* Fall through. */ + case stateContextMapDecode: + { + var context_index uint32 = s.context_index + var max_run_length_prefix uint32 = s.max_run_length_prefix + var context_map []byte = *context_map_arg + var code uint32 = s.code + var skip_preamble bool = (code != 0xFFFF) + for context_index < context_map_size || skip_preamble { + if !skip_preamble { + if !safeReadSymbol(s.context_map_table[:], br, &code) { + s.code = 0xFFFF + s.context_index = context_index + return decoderNeedsMoreInput + } + + if code == 0 { + context_map[context_index] = 0 + context_index++ + continue + } + + if code > max_run_length_prefix { + context_map[context_index] = byte(code - max_run_length_prefix) + context_index++ + continue + } + } else { + skip_preamble = false + } + + /* RLE sub-stage. */ + { + var reps uint32 + if !safeReadBits(br, code, &reps) { + s.code = code + s.context_index = context_index + return decoderNeedsMoreInput + } + + reps += 1 << code + if context_index+reps > context_map_size { + return decoderErrorFormatContextMapRepeat + } + + for { + context_map[context_index] = 0 + context_index++ + reps-- + if reps == 0 { + break + } + } + } + } + } + fallthrough + + case stateContextMapTransform: + var bits uint32 + if !safeReadBits(br, 1, &bits) { + s.substate_context_map = stateContextMapTransform + return decoderNeedsMoreInput + } + + if bits != 0 { + inverseMoveToFrontTransform(*context_map_arg, context_map_size, s) + } + + s.substate_context_map = stateContextMapNone + return decoderSuccess + + default: + return decoderErrorUnreachable + } +} + +/* Decodes a command or literal and updates block type ring-buffer. + Reads 3..54 bits. */ +func decodeBlockTypeAndLength(safe int, s *Reader, tree_type int) bool { + var max_block_type uint32 = s.num_block_types[tree_type] + type_tree := s.block_type_trees[tree_type*huffmanMaxSize258:] + len_tree := s.block_len_trees[tree_type*huffmanMaxSize26:] + var br *bitReader = &s.br + var ringbuffer []uint32 = s.block_type_rb[tree_type*2:] + var block_type uint32 + if max_block_type <= 1 { + return false + } + + /* Read 0..15 + 3..39 bits. */ + if safe == 0 { + block_type = readSymbol(type_tree, br) + s.block_length[tree_type] = readBlockLength(len_tree, br) + } else { + var memento bitReaderState + bitReaderSaveState(br, &memento) + if !safeReadSymbol(type_tree, br, &block_type) { + return false + } + if !safeReadBlockLength(s, &s.block_length[tree_type], len_tree, br) { + s.substate_read_block_length = stateReadBlockLengthNone + bitReaderRestoreState(br, &memento) + return false + } + } + + if block_type == 1 { + block_type = ringbuffer[1] + 1 + } else if block_type == 0 { + block_type = ringbuffer[0] + } else { + block_type -= 2 + } + + if block_type >= max_block_type { + block_type -= max_block_type + } + + ringbuffer[0] = ringbuffer[1] + ringbuffer[1] = block_type + return true +} + +func detectTrivialLiteralBlockTypes(s *Reader) { + var i uint + for i = 0; i < 8; i++ { + s.trivial_literal_contexts[i] = 0 + } + for i = 0; uint32(i) < s.num_block_types[0]; i++ { + var offset uint = i << literalContextBits + var error uint = 0 + var sample uint = uint(s.context_map[offset]) + var j uint + for j = 0; j < 1<>5] |= 1 << (i & 31) + } + } +} + +func prepareLiteralDecoding(s *Reader) { + var context_mode byte + var trivial uint + var block_type uint32 = s.block_type_rb[1] + var context_offset uint32 = block_type << literalContextBits + s.context_map_slice = s.context_map[context_offset:] + trivial = uint(s.trivial_literal_contexts[block_type>>5]) + s.trivial_literal_context = int((trivial >> (block_type & 31)) & 1) + s.literal_htree = []huffmanCode(s.literal_hgroup.htrees[s.context_map_slice[0]]) + context_mode = s.context_modes[block_type] & 3 + s.context_lookup = getContextLUT(int(context_mode)) +} + +/* Decodes the block type and updates the state for literal context. + Reads 3..54 bits. */ +func decodeLiteralBlockSwitchInternal(safe int, s *Reader) bool { + if !decodeBlockTypeAndLength(safe, s, 0) { + return false + } + + prepareLiteralDecoding(s) + return true +} + +func decodeLiteralBlockSwitch(s *Reader) { + decodeLiteralBlockSwitchInternal(0, s) +} + +func safeDecodeLiteralBlockSwitch(s *Reader) bool { + return decodeLiteralBlockSwitchInternal(1, s) +} + +/* Block switch for insert/copy length. + Reads 3..54 bits. */ +func decodeCommandBlockSwitchInternal(safe int, s *Reader) bool { + if !decodeBlockTypeAndLength(safe, s, 1) { + return false + } + + s.htree_command = []huffmanCode(s.insert_copy_hgroup.htrees[s.block_type_rb[3]]) + return true +} + +func decodeCommandBlockSwitch(s *Reader) { + decodeCommandBlockSwitchInternal(0, s) +} + +func safeDecodeCommandBlockSwitch(s *Reader) bool { + return decodeCommandBlockSwitchInternal(1, s) +} + +/* Block switch for distance codes. + Reads 3..54 bits. */ +func decodeDistanceBlockSwitchInternal(safe int, s *Reader) bool { + if !decodeBlockTypeAndLength(safe, s, 2) { + return false + } + + s.dist_context_map_slice = s.dist_context_map[s.block_type_rb[5]< s.ringbuffer_size { + pos = uint(s.ringbuffer_size) + } else { + pos = uint(s.pos) + } + var partial_pos_rb uint = (s.rb_roundtrips * uint(s.ringbuffer_size)) + pos + return partial_pos_rb - s.partial_pos_out +} + +/* Dumps output. + Returns BROTLI_DECODER_NEEDS_MORE_OUTPUT only if there is more output to push + and either ring-buffer is as big as window size, or |force| is true. */ +func writeRingBuffer(s *Reader, available_out *uint, next_out *[]byte, total_out *uint, force bool) int { + start := s.ringbuffer[s.partial_pos_out&uint(s.ringbuffer_mask):] + var to_write uint = unwrittenBytes(s, true) + var num_written uint = *available_out + if num_written > to_write { + num_written = to_write + } + + if s.meta_block_remaining_len < 0 { + return decoderErrorFormatBlockLength1 + } + + if next_out != nil && *next_out == nil { + *next_out = start + } else { + if next_out != nil { + copy(*next_out, start[:num_written]) + *next_out = (*next_out)[num_written:] + } + } + + *available_out -= num_written + s.partial_pos_out += num_written + if total_out != nil { + *total_out = s.partial_pos_out + } + + if num_written < to_write { + if s.ringbuffer_size == 1<= s.ringbuffer_size { + s.pos -= s.ringbuffer_size + s.rb_roundtrips++ + if uint(s.pos) != 0 { + s.should_wrap_ringbuffer = 1 + } else { + s.should_wrap_ringbuffer = 0 + } + } + + return decoderSuccess +} + +func wrapRingBuffer(s *Reader) { + if s.should_wrap_ringbuffer != 0 { + copy(s.ringbuffer, s.ringbuffer_end[:uint(s.pos)]) + s.should_wrap_ringbuffer = 0 + } +} + +/* Allocates ring-buffer. + + s->ringbuffer_size MUST be updated by BrotliCalculateRingBufferSize before + this function is called. + + Last two bytes of ring-buffer are initialized to 0, so context calculation + could be done uniformly for the first two and all other positions. */ +func ensureRingBuffer(s *Reader) bool { + var old_ringbuffer []byte + if s.ringbuffer_size == s.new_ringbuffer_size { + return true + } + spaceNeeded := int(s.new_ringbuffer_size) + int(kRingBufferWriteAheadSlack) + if len(s.ringbuffer) < spaceNeeded { + old_ringbuffer = s.ringbuffer + s.ringbuffer = make([]byte, spaceNeeded) + } + + s.ringbuffer[s.new_ringbuffer_size-2] = 0 + s.ringbuffer[s.new_ringbuffer_size-1] = 0 + + if old_ringbuffer != nil { + copy(s.ringbuffer, old_ringbuffer[:uint(s.pos)]) + } + + s.ringbuffer_size = s.new_ringbuffer_size + s.ringbuffer_mask = s.new_ringbuffer_size - 1 + s.ringbuffer_end = s.ringbuffer[s.ringbuffer_size:] + + return true +} + +func copyUncompressedBlockToOutput(available_out *uint, next_out *[]byte, total_out *uint, s *Reader) int { + /* TODO: avoid allocation for single uncompressed block. */ + if !ensureRingBuffer(s) { + return decoderErrorAllocRingBuffer1 + } + + /* State machine */ + for { + switch s.substate_uncompressed { + case stateUncompressedNone: + { + var nbytes int = int(getRemainingBytes(&s.br)) + if nbytes > s.meta_block_remaining_len { + nbytes = s.meta_block_remaining_len + } + + if s.pos+nbytes > s.ringbuffer_size { + nbytes = s.ringbuffer_size - s.pos + } + + /* Copy remaining bytes from s->br.buf_ to ring-buffer. */ + copyBytes(s.ringbuffer[s.pos:], &s.br, uint(nbytes)) + + s.pos += nbytes + s.meta_block_remaining_len -= nbytes + if s.pos < 1<>1 >= min_size { + new_ringbuffer_size >>= 1 + } + } + + s.new_ringbuffer_size = new_ringbuffer_size +} + +/* Reads 1..256 2-bit context modes. */ +func readContextModes(s *Reader) int { + var br *bitReader = &s.br + var i int = s.loop_counter + + for i < int(s.num_block_types[0]) { + var bits uint32 + if !safeReadBits(br, 2, &bits) { + s.loop_counter = i + return decoderNeedsMoreInput + } + + s.context_modes[i] = byte(bits) + i++ + } + + return decoderSuccess +} + +func takeDistanceFromRingBuffer(s *Reader) { + if s.distance_code == 0 { + s.dist_rb_idx-- + s.distance_code = s.dist_rb[s.dist_rb_idx&3] + + /* Compensate double distance-ring-buffer roll for dictionary items. */ + s.distance_context = 1 + } else { + var distance_code int = s.distance_code << 1 + const kDistanceShortCodeIndexOffset uint32 = 0xAAAFFF1B + const kDistanceShortCodeValueOffset uint32 = 0xFA5FA500 + var v int = (s.dist_rb_idx + int(kDistanceShortCodeIndexOffset>>uint(distance_code))) & 0x3 + /* kDistanceShortCodeIndexOffset has 2-bit values from LSB: + 3, 2, 1, 0, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2 */ + + /* kDistanceShortCodeValueOffset has 2-bit values from LSB: + -0, 0,-0, 0,-1, 1,-2, 2,-3, 3,-1, 1,-2, 2,-3, 3 */ + s.distance_code = s.dist_rb[v] + + v = int(kDistanceShortCodeValueOffset>>uint(distance_code)) & 0x3 + if distance_code&0x3 != 0 { + s.distance_code += v + } else { + s.distance_code -= v + if s.distance_code <= 0 { + /* A huge distance will cause a () soon. + This is a little faster than failing here. */ + s.distance_code = 0x7FFFFFFF + } + } + } +} + +func safeReadBitsMaybeZero(br *bitReader, n_bits uint32, val *uint32) bool { + if n_bits != 0 { + return safeReadBits(br, n_bits, val) + } else { + *val = 0 + return true + } +} + +/* Precondition: s->distance_code < 0. */ +func readDistanceInternal(safe int, s *Reader, br *bitReader) bool { + var distval int + var memento bitReaderState + var distance_tree []huffmanCode = []huffmanCode(s.distance_hgroup.htrees[s.dist_htree_index]) + if safe == 0 { + s.distance_code = int(readSymbol(distance_tree, br)) + } else { + var code uint32 + bitReaderSaveState(br, &memento) + if !safeReadSymbol(distance_tree, br, &code) { + return false + } + + s.distance_code = int(code) + } + + /* Convert the distance code to the actual distance by possibly + looking up past distances from the s->ringbuffer. */ + s.distance_context = 0 + + if s.distance_code&^0xF == 0 { + takeDistanceFromRingBuffer(s) + s.block_length[2]-- + return true + } + + distval = s.distance_code - int(s.num_direct_distance_codes) + if distval >= 0 { + var nbits uint32 + var postfix int + var offset int + if safe == 0 && (s.distance_postfix_bits == 0) { + nbits = (uint32(distval) >> 1) + 1 + offset = ((2 + (distval & 1)) << nbits) - 4 + s.distance_code = int(s.num_direct_distance_codes) + offset + int(readBits(br, nbits)) + } else { + /* This branch also works well when s->distance_postfix_bits == 0. */ + var bits uint32 + postfix = distval & s.distance_postfix_mask + distval >>= s.distance_postfix_bits + nbits = (uint32(distval) >> 1) + 1 + if safe != 0 { + if !safeReadBitsMaybeZero(br, nbits, &bits) { + s.distance_code = -1 /* Restore precondition. */ + bitReaderRestoreState(br, &memento) + return false + } + } else { + bits = readBits(br, nbits) + } + + offset = ((2 + (distval & 1)) << nbits) - 4 + s.distance_code = int(s.num_direct_distance_codes) + ((offset + int(bits)) << s.distance_postfix_bits) + postfix + } + } + + s.distance_code = s.distance_code - numDistanceShortCodes + 1 + s.block_length[2]-- + return true +} + +func readDistance(s *Reader, br *bitReader) { + readDistanceInternal(0, s, br) +} + +func safeReadDistance(s *Reader, br *bitReader) bool { + return readDistanceInternal(1, s, br) +} + +func readCommandInternal(safe int, s *Reader, br *bitReader, insert_length *int) bool { + var cmd_code uint32 + var insert_len_extra uint32 = 0 + var copy_length uint32 + var v cmdLutElement + var memento bitReaderState + if safe == 0 { + cmd_code = readSymbol(s.htree_command, br) + } else { + bitReaderSaveState(br, &memento) + if !safeReadSymbol(s.htree_command, br, &cmd_code) { + return false + } + } + + v = kCmdLut[cmd_code] + s.distance_code = int(v.distance_code) + s.distance_context = int(v.context) + s.dist_htree_index = s.dist_context_map_slice[s.distance_context] + *insert_length = int(v.insert_len_offset) + if safe == 0 { + if v.insert_len_extra_bits != 0 { + insert_len_extra = readBits(br, uint32(v.insert_len_extra_bits)) + } + + copy_length = readBits(br, uint32(v.copy_len_extra_bits)) + } else { + if !safeReadBitsMaybeZero(br, uint32(v.insert_len_extra_bits), &insert_len_extra) || !safeReadBitsMaybeZero(br, uint32(v.copy_len_extra_bits), ©_length) { + bitReaderRestoreState(br, &memento) + return false + } + } + + s.copy_length = int(copy_length) + int(v.copy_len_offset) + s.block_length[1]-- + *insert_length += int(insert_len_extra) + return true +} + +func readCommand(s *Reader, br *bitReader, insert_length *int) { + readCommandInternal(0, s, br, insert_length) +} + +func safeReadCommand(s *Reader, br *bitReader, insert_length *int) bool { + return readCommandInternal(1, s, br, insert_length) +} + +func checkInputAmountMaybeSafe(safe int, br *bitReader, num uint) bool { + if safe != 0 { + return true + } + + return checkInputAmount(br, num) +} + +func processCommandsInternal(safe int, s *Reader) int { + var pos int = s.pos + var i int = s.loop_counter + var result int = decoderSuccess + var br *bitReader = &s.br + var hc []huffmanCode + + if !checkInputAmountMaybeSafe(safe, br, 28) { + result = decoderNeedsMoreInput + goto saveStateAndReturn + } + + if safe == 0 { + warmupBitReader(br) + } + + /* Jump into state machine. */ + if s.state == stateCommandBegin { + goto CommandBegin + } else if s.state == stateCommandInner { + goto CommandInner + } else if s.state == stateCommandPostDecodeLiterals { + goto CommandPostDecodeLiterals + } else if s.state == stateCommandPostWrapCopy { + goto CommandPostWrapCopy + } else { + return decoderErrorUnreachable + } + +CommandBegin: + if safe != 0 { + s.state = stateCommandBegin + } + + if !checkInputAmountMaybeSafe(safe, br, 28) { /* 156 bits + 7 bytes */ + s.state = stateCommandBegin + result = decoderNeedsMoreInput + goto saveStateAndReturn + } + + if s.block_length[1] == 0 { + if safe != 0 { + if !safeDecodeCommandBlockSwitch(s) { + result = decoderNeedsMoreInput + goto saveStateAndReturn + } + } else { + decodeCommandBlockSwitch(s) + } + + goto CommandBegin + } + + /* Read the insert/copy length in the command. */ + if safe != 0 { + if !safeReadCommand(s, br, &i) { + result = decoderNeedsMoreInput + goto saveStateAndReturn + } + } else { + readCommand(s, br, &i) + } + + if i == 0 { + goto CommandPostDecodeLiterals + } + + s.meta_block_remaining_len -= i + +CommandInner: + if safe != 0 { + s.state = stateCommandInner + } + + /* Read the literals in the command. */ + if s.trivial_literal_context != 0 { + var bits uint32 + var value uint32 + preloadSymbol(safe, s.literal_htree, br, &bits, &value) + for { + if !checkInputAmountMaybeSafe(safe, br, 28) { /* 162 bits + 7 bytes */ + s.state = stateCommandInner + result = decoderNeedsMoreInput + goto saveStateAndReturn + } + + if s.block_length[0] == 0 { + if safe != 0 { + if !safeDecodeLiteralBlockSwitch(s) { + result = decoderNeedsMoreInput + goto saveStateAndReturn + } + } else { + decodeLiteralBlockSwitch(s) + } + + preloadSymbol(safe, s.literal_htree, br, &bits, &value) + if s.trivial_literal_context == 0 { + goto CommandInner + } + } + + if safe == 0 { + s.ringbuffer[pos] = byte(readPreloadedSymbol(s.literal_htree, br, &bits, &value)) + } else { + var literal uint32 + if !safeReadSymbol(s.literal_htree, br, &literal) { + result = decoderNeedsMoreInput + goto saveStateAndReturn + } + + s.ringbuffer[pos] = byte(literal) + } + + s.block_length[0]-- + pos++ + if pos == s.ringbuffer_size { + s.state = stateCommandInnerWrite + i-- + goto saveStateAndReturn + } + i-- + if i == 0 { + break + } + } + } else { + var p1 byte = s.ringbuffer[(pos-1)&s.ringbuffer_mask] + var p2 byte = s.ringbuffer[(pos-2)&s.ringbuffer_mask] + for { + var context byte + if !checkInputAmountMaybeSafe(safe, br, 28) { /* 162 bits + 7 bytes */ + s.state = stateCommandInner + result = decoderNeedsMoreInput + goto saveStateAndReturn + } + + if s.block_length[0] == 0 { + if safe != 0 { + if !safeDecodeLiteralBlockSwitch(s) { + result = decoderNeedsMoreInput + goto saveStateAndReturn + } + } else { + decodeLiteralBlockSwitch(s) + } + + if s.trivial_literal_context != 0 { + goto CommandInner + } + } + + context = getContext(p1, p2, s.context_lookup) + hc = []huffmanCode(s.literal_hgroup.htrees[s.context_map_slice[context]]) + p2 = p1 + if safe == 0 { + p1 = byte(readSymbol(hc, br)) + } else { + var literal uint32 + if !safeReadSymbol(hc, br, &literal) { + result = decoderNeedsMoreInput + goto saveStateAndReturn + } + + p1 = byte(literal) + } + + s.ringbuffer[pos] = p1 + s.block_length[0]-- + pos++ + if pos == s.ringbuffer_size { + s.state = stateCommandInnerWrite + i-- + goto saveStateAndReturn + } + i-- + if i == 0 { + break + } + } + } + + if s.meta_block_remaining_len <= 0 { + s.state = stateMetablockDone + goto saveStateAndReturn + } + +CommandPostDecodeLiterals: + if safe != 0 { + s.state = stateCommandPostDecodeLiterals + } + + if s.distance_code >= 0 { + /* Implicit distance case. */ + if s.distance_code != 0 { + s.distance_context = 0 + } else { + s.distance_context = 1 + } + + s.dist_rb_idx-- + s.distance_code = s.dist_rb[s.dist_rb_idx&3] + } else { + /* Read distance code in the command, unless it was implicitly zero. */ + if s.block_length[2] == 0 { + if safe != 0 { + if !safeDecodeDistanceBlockSwitch(s) { + result = decoderNeedsMoreInput + goto saveStateAndReturn + } + } else { + decodeDistanceBlockSwitch(s) + } + } + + if safe != 0 { + if !safeReadDistance(s, br) { + result = decoderNeedsMoreInput + goto saveStateAndReturn + } + } else { + readDistance(s, br) + } + } + + if s.max_distance != s.max_backward_distance { + if pos < s.max_backward_distance { + s.max_distance = pos + } else { + s.max_distance = s.max_backward_distance + } + } + + i = s.copy_length + + /* Apply copy of LZ77 back-reference, or static dictionary reference if + the distance is larger than the max LZ77 distance */ + if s.distance_code > s.max_distance { + /* The maximum allowed distance is BROTLI_MAX_ALLOWED_DISTANCE = 0x7FFFFFFC. + With this choice, no signed overflow can occur after decoding + a special distance code (e.g., after adding 3 to the last distance). */ + if s.distance_code > maxAllowedDistance { + return decoderErrorFormatDistance + } + + if i >= minDictionaryWordLength && i <= maxDictionaryWordLength { + var address int = s.distance_code - s.max_distance - 1 + var words *dictionary = s.dictionary + var trans *transforms = s.transforms + var offset int = int(s.dictionary.offsets_by_length[i]) + var shift uint32 = uint32(s.dictionary.size_bits_by_length[i]) + var mask int = int(bitMask(shift)) + var word_idx int = address & mask + var transform_idx int = address >> shift + + /* Compensate double distance-ring-buffer roll. */ + s.dist_rb_idx += s.distance_context + + offset += word_idx * i + if words.data == nil { + return decoderErrorDictionaryNotSet + } + + if transform_idx < int(trans.num_transforms) { + word := words.data[offset:] + var len int = i + if transform_idx == int(trans.cutOffTransforms[0]) { + copy(s.ringbuffer[pos:], word[:uint(len)]) + } else { + len = transformDictionaryWord(s.ringbuffer[pos:], word, int(len), trans, transform_idx) + } + + pos += int(len) + s.meta_block_remaining_len -= int(len) + if pos >= s.ringbuffer_size { + s.state = stateCommandPostWrite1 + goto saveStateAndReturn + } + } else { + return decoderErrorFormatTransform + } + } else { + return decoderErrorFormatDictionary + } + } else { + var src_start int = (pos - s.distance_code) & s.ringbuffer_mask + copy_dst := s.ringbuffer[pos:] + copy_src := s.ringbuffer[src_start:] + var dst_end int = pos + i + var src_end int = src_start + i + + /* Update the recent distances cache. */ + s.dist_rb[s.dist_rb_idx&3] = s.distance_code + + s.dist_rb_idx++ + s.meta_block_remaining_len -= i + + /* There are 32+ bytes of slack in the ring-buffer allocation. + Also, we have 16 short codes, that make these 16 bytes irrelevant + in the ring-buffer. Let's copy over them as a first guess. */ + copy(copy_dst, copy_src[:16]) + + if src_end > pos && dst_end > src_start { + /* Regions intersect. */ + goto CommandPostWrapCopy + } + + if dst_end >= s.ringbuffer_size || src_end >= s.ringbuffer_size { + /* At least one region wraps. */ + goto CommandPostWrapCopy + } + + pos += i + if i > 16 { + if i > 32 { + copy(copy_dst[16:], copy_src[16:][:uint(i-16)]) + } else { + /* This branch covers about 45% cases. + Fixed size short copy allows more compiler optimizations. */ + copy(copy_dst[16:], copy_src[16:][:16]) + } + } + } + + if s.meta_block_remaining_len <= 0 { + /* Next metablock, if any. */ + s.state = stateMetablockDone + + goto saveStateAndReturn + } else { + goto CommandBegin + } +CommandPostWrapCopy: + { + var wrap_guard int = s.ringbuffer_size - pos + for { + i-- + if i < 0 { + break + } + s.ringbuffer[pos] = s.ringbuffer[(pos-s.distance_code)&s.ringbuffer_mask] + pos++ + wrap_guard-- + if wrap_guard == 0 { + s.state = stateCommandPostWrite2 + goto saveStateAndReturn + } + } + } + + if s.meta_block_remaining_len <= 0 { + /* Next metablock, if any. */ + s.state = stateMetablockDone + + goto saveStateAndReturn + } else { + goto CommandBegin + } + +saveStateAndReturn: + s.pos = pos + s.loop_counter = i + return result +} + +func processCommands(s *Reader) int { + return processCommandsInternal(0, s) +} + +func safeProcessCommands(s *Reader) int { + return processCommandsInternal(1, s) +} + +/* Returns the maximum number of distance symbols which can only represent + distances not exceeding BROTLI_MAX_ALLOWED_DISTANCE. */ + +var maxDistanceSymbol_bound = [maxNpostfix + 1]uint32{0, 4, 12, 28} +var maxDistanceSymbol_diff = [maxNpostfix + 1]uint32{73, 126, 228, 424} + +func maxDistanceSymbol(ndirect uint32, npostfix uint32) uint32 { + var postfix uint32 = 1 << npostfix + if ndirect < maxDistanceSymbol_bound[npostfix] { + return ndirect + maxDistanceSymbol_diff[npostfix] + postfix + } else if ndirect > maxDistanceSymbol_bound[npostfix]+postfix { + return ndirect + maxDistanceSymbol_diff[npostfix] + } else { + return maxDistanceSymbol_bound[npostfix] + maxDistanceSymbol_diff[npostfix] + postfix + } +} + +/* Invariant: input stream is never overconsumed: + - invalid input implies that the whole stream is invalid -> any amount of + input could be read and discarded + - when result is "needs more input", then at least one more byte is REQUIRED + to complete decoding; all input data MUST be consumed by decoder, so + client could swap the input buffer + - when result is "needs more output" decoder MUST ensure that it doesn't + hold more than 7 bits in bit reader; this saves client from swapping input + buffer ahead of time + - when result is "success" decoder MUST return all unused data back to input + buffer; this is possible because the invariant is held on enter */ +func decoderDecompressStream(s *Reader, available_in *uint, next_in *[]byte, available_out *uint, next_out *[]byte) int { + var result int = decoderSuccess + var br *bitReader = &s.br + + /* Do not try to process further in a case of unrecoverable error. */ + if int(s.error_code) < 0 { + return decoderResultError + } + + if *available_out != 0 && (next_out == nil || *next_out == nil) { + return saveErrorCode(s, decoderErrorInvalidArguments) + } + + if *available_out == 0 { + next_out = nil + } + if s.buffer_length == 0 { /* Just connect bit reader to input stream. */ + br.input_len = *available_in + br.input = *next_in + br.byte_pos = 0 + } else { + /* At least one byte of input is required. More than one byte of input may + be required to complete the transaction -> reading more data must be + done in a loop -> do it in a main loop. */ + result = decoderNeedsMoreInput + + br.input = s.buffer.u8[:] + br.byte_pos = 0 + } + + /* State machine */ + for { + if result != decoderSuccess { + /* Error, needs more input/output. */ + if result == decoderNeedsMoreInput { + if s.ringbuffer != nil { /* Pro-actively push output. */ + var intermediate_result int = writeRingBuffer(s, available_out, next_out, nil, true) + + /* WriteRingBuffer checks s->meta_block_remaining_len validity. */ + if int(intermediate_result) < 0 { + result = intermediate_result + break + } + } + + if s.buffer_length != 0 { /* Used with internal buffer. */ + if br.byte_pos == br.input_len { + /* Successfully finished read transaction. + Accumulator contains less than 8 bits, because internal buffer + is expanded byte-by-byte until it is enough to complete read. */ + s.buffer_length = 0 + + /* Switch to input stream and restart. */ + result = decoderSuccess + + br.input_len = *available_in + br.input = *next_in + br.byte_pos = 0 + continue + } else if *available_in != 0 { + /* Not enough data in buffer, but can take one more byte from + input stream. */ + result = decoderSuccess + + s.buffer.u8[s.buffer_length] = (*next_in)[0] + s.buffer_length++ + br.input_len = uint(s.buffer_length) + *next_in = (*next_in)[1:] + (*available_in)-- + + /* Retry with more data in buffer. */ + continue + } + + /* Can't finish reading and no more input. */ + break + /* Input stream doesn't contain enough input. */ + } else { + /* Copy tail to internal buffer and return. */ + *next_in = br.input[br.byte_pos:] + + *available_in = br.input_len - br.byte_pos + for *available_in != 0 { + s.buffer.u8[s.buffer_length] = (*next_in)[0] + s.buffer_length++ + *next_in = (*next_in)[1:] + (*available_in)-- + } + + break + } + } + + /* Unreachable. */ + + /* Fail or needs more output. */ + if s.buffer_length != 0 { + /* Just consumed the buffered input and produced some output. Otherwise + it would result in "needs more input". Reset internal buffer. */ + s.buffer_length = 0 + } else { + /* Using input stream in last iteration. When decoder switches to input + stream it has less than 8 bits in accumulator, so it is safe to + return unused accumulator bits there. */ + bitReaderUnload(br) + + *available_in = br.input_len - br.byte_pos + *next_in = br.input[br.byte_pos:] + } + + break + } + + switch s.state { + /* Prepare to the first read. */ + case stateUninited: + if !warmupBitReader(br) { + result = decoderNeedsMoreInput + break + } + + /* Decode window size. */ + result = decodeWindowBits(s, br) /* Reads 1..8 bits. */ + if result != decoderSuccess { + break + } + + if s.large_window { + s.state = stateLargeWindowBits + break + } + + s.state = stateInitialize + + case stateLargeWindowBits: + if !safeReadBits(br, 6, &s.window_bits) { + result = decoderNeedsMoreInput + break + } + + if s.window_bits < largeMinWbits || s.window_bits > largeMaxWbits { + result = decoderErrorFormatWindowBits + break + } + + s.state = stateInitialize + fallthrough + + /* Maximum distance, see section 9.1. of the spec. */ + /* Fall through. */ + case stateInitialize: + s.max_backward_distance = (1 << s.window_bits) - windowGap + + /* Allocate memory for both block_type_trees and block_len_trees. */ + s.block_type_trees = make([]huffmanCode, (3 * (huffmanMaxSize258 + huffmanMaxSize26))) + + if s.block_type_trees == nil { + result = decoderErrorAllocBlockTypeTrees + break + } + + s.block_len_trees = s.block_type_trees[3*huffmanMaxSize258:] + + s.state = stateMetablockBegin + fallthrough + + /* Fall through. */ + case stateMetablockBegin: + decoderStateMetablockBegin(s) + + s.state = stateMetablockHeader + fallthrough + + /* Fall through. */ + case stateMetablockHeader: + result = decodeMetaBlockLength(s, br) + /* Reads 2 - 31 bits. */ + if result != decoderSuccess { + break + } + + if s.is_metadata != 0 || s.is_uncompressed != 0 { + if !bitReaderJumpToByteBoundary(br) { + result = decoderErrorFormatPadding1 + break + } + } + + if s.is_metadata != 0 { + s.state = stateMetadata + break + } + + if s.meta_block_remaining_len == 0 { + s.state = stateMetablockDone + break + } + + calculateRingBufferSize(s) + if s.is_uncompressed != 0 { + s.state = stateUncompressed + break + } + + s.loop_counter = 0 + s.state = stateHuffmanCode0 + + case stateUncompressed: + result = copyUncompressedBlockToOutput(available_out, next_out, nil, s) + if result == decoderSuccess { + s.state = stateMetablockDone + } + + case stateMetadata: + for ; s.meta_block_remaining_len > 0; s.meta_block_remaining_len-- { + var bits uint32 + + /* Read one byte and ignore it. */ + if !safeReadBits(br, 8, &bits) { + result = decoderNeedsMoreInput + break + } + } + + if result == decoderSuccess { + s.state = stateMetablockDone + } + + case stateHuffmanCode0: + if s.loop_counter >= 3 { + s.state = stateMetablockHeader2 + break + } + + /* Reads 1..11 bits. */ + result = decodeVarLenUint8(s, br, &s.num_block_types[s.loop_counter]) + + if result != decoderSuccess { + break + } + + s.num_block_types[s.loop_counter]++ + if s.num_block_types[s.loop_counter] < 2 { + s.loop_counter++ + break + } + + s.state = stateHuffmanCode1 + fallthrough + + case stateHuffmanCode1: + { + var alphabet_size uint32 = s.num_block_types[s.loop_counter] + 2 + var tree_offset int = s.loop_counter * huffmanMaxSize258 + result = readHuffmanCode(alphabet_size, alphabet_size, s.block_type_trees[tree_offset:], nil, s) + if result != decoderSuccess { + break + } + s.state = stateHuffmanCode2 + } + fallthrough + + case stateHuffmanCode2: + { + var alphabet_size uint32 = numBlockLenSymbols + var tree_offset int = s.loop_counter * huffmanMaxSize26 + result = readHuffmanCode(alphabet_size, alphabet_size, s.block_len_trees[tree_offset:], nil, s) + if result != decoderSuccess { + break + } + s.state = stateHuffmanCode3 + } + fallthrough + + case stateHuffmanCode3: + var tree_offset int = s.loop_counter * huffmanMaxSize26 + if !safeReadBlockLength(s, &s.block_length[s.loop_counter], s.block_len_trees[tree_offset:], br) { + result = decoderNeedsMoreInput + break + } + + s.loop_counter++ + s.state = stateHuffmanCode0 + + case stateMetablockHeader2: + { + var bits uint32 + if !safeReadBits(br, 6, &bits) { + result = decoderNeedsMoreInput + break + } + + s.distance_postfix_bits = bits & bitMask(2) + bits >>= 2 + s.num_direct_distance_codes = numDistanceShortCodes + (bits << s.distance_postfix_bits) + s.distance_postfix_mask = int(bitMask(s.distance_postfix_bits)) + s.context_modes = make([]byte, uint(s.num_block_types[0])) + if s.context_modes == nil { + result = decoderErrorAllocContextModes + break + } + + s.loop_counter = 0 + s.state = stateContextModes + } + fallthrough + + case stateContextModes: + result = readContextModes(s) + + if result != decoderSuccess { + break + } + + s.state = stateContextMap1 + fallthrough + + case stateContextMap1: + result = decodeContextMap(s.num_block_types[0]<= 3 { + prepareLiteralDecoding(s) + s.dist_context_map_slice = s.dist_context_map + s.htree_command = []huffmanCode(s.insert_copy_hgroup.htrees[0]) + if !ensureRingBuffer(s) { + result = decoderErrorAllocRingBuffer2 + break + } + + s.state = stateCommandBegin + } + + case stateCommandBegin, stateCommandInner, stateCommandPostDecodeLiterals, stateCommandPostWrapCopy: + result = processCommands(s) + + if result == decoderNeedsMoreInput { + result = safeProcessCommands(s) + } + + case stateCommandInnerWrite, stateCommandPostWrite1, stateCommandPostWrite2: + result = writeRingBuffer(s, available_out, next_out, nil, false) + + if result != decoderSuccess { + break + } + + wrapRingBuffer(s) + if s.ringbuffer_size == 1<= uint64(block_size) { + return 0 + } + return block_size - uint(delta) +} + +/* Wraps 64-bit input position to 32-bit ring-buffer position preserving + "not-a-first-lap" feature. */ +func wrapPosition(position uint64) uint32 { + var result uint32 = uint32(position) + var gb uint64 = position >> 30 + if gb > 2 { + /* Wrap every 2GiB; The first 3GB are continuous. */ + result = result&((1<<30)-1) | (uint32((gb-1)&1)+1)<<30 + } + + return result +} + +func (s *Writer) getStorage(size int) []byte { + if len(s.storage) < size { + s.storage = make([]byte, size) + } + + return s.storage +} + +func hashTableSize(max_table_size uint, input_size uint) uint { + var htsize uint = 256 + for htsize < max_table_size && htsize < input_size { + htsize <<= 1 + } + + return htsize +} + +func getHashTable(s *Writer, quality int, input_size uint, table_size *uint) []int { + var max_table_size uint = maxHashTableSize(quality) + var htsize uint = hashTableSize(max_table_size, input_size) + /* Use smaller hash table when input.size() is smaller, since we + fill the table, incurring O(hash table size) overhead for + compression, and if the input is short, we won't need that + many hash table entries anyway. */ + + var table []int + assert(max_table_size >= 256) + if quality == fastOnePassCompressionQuality { + /* Only odd shifts are supported by fast-one-pass. */ + if htsize&0xAAAAA == 0 { + htsize <<= 1 + } + } + + if htsize <= uint(len(s.small_table_)) { + table = s.small_table_[:] + } else { + if htsize > s.large_table_size_ { + s.large_table_size_ = htsize + s.large_table_ = nil + s.large_table_ = make([]int, htsize) + } + + table = s.large_table_ + } + + *table_size = htsize + for i := 0; i < int(htsize); i++ { + table[i] = 0 + } + return table +} + +func encodeWindowBits(lgwin int, large_window bool, last_bytes *uint16, last_bytes_bits *byte) { + if large_window { + *last_bytes = uint16((lgwin&0x3F)<<8 | 0x11) + *last_bytes_bits = 14 + } else { + if lgwin == 16 { + *last_bytes = 0 + *last_bytes_bits = 1 + } else if lgwin == 17 { + *last_bytes = 1 + *last_bytes_bits = 7 + } else if lgwin > 17 { + *last_bytes = uint16((lgwin-17)<<1 | 0x01) + *last_bytes_bits = 4 + } else { + *last_bytes = uint16((lgwin-8)<<4 | 0x01) + *last_bytes_bits = 7 + } + } +} + +/* Decide about the context map based on the ability of the prediction + ability of the previous byte UTF8-prefix on the next byte. The + prediction ability is calculated as Shannon entropy. Here we need + Shannon entropy instead of 'BitsEntropy' since the prefix will be + encoded with the remaining 6 bits of the following byte, and + BitsEntropy will assume that symbol to be stored alone using Huffman + coding. */ + +var kStaticContextMapContinuation = [64]uint32{ + 1, 1, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, +} +var kStaticContextMapSimpleUTF8 = [64]uint32{ + 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, +} + +func chooseContextMap(quality int, bigram_histo []uint32, num_literal_contexts *uint, literal_context_map *[]uint32) { + var monogram_histo = [3]uint32{0} + var two_prefix_histo = [6]uint32{0} + var total uint + var i uint + var dummy uint + var entropy [4]float64 + for i = 0; i < 9; i++ { + monogram_histo[i%3] += bigram_histo[i] + two_prefix_histo[i%6] += bigram_histo[i] + } + + entropy[1] = shannonEntropy(monogram_histo[:], 3, &dummy) + entropy[2] = (shannonEntropy(two_prefix_histo[:], 3, &dummy) + shannonEntropy(two_prefix_histo[3:], 3, &dummy)) + entropy[3] = 0 + for i = 0; i < 3; i++ { + entropy[3] += shannonEntropy(bigram_histo[3*i:], 3, &dummy) + } + + total = uint(monogram_histo[0] + monogram_histo[1] + monogram_histo[2]) + assert(total != 0) + entropy[0] = 1.0 / float64(total) + entropy[1] *= entropy[0] + entropy[2] *= entropy[0] + entropy[3] *= entropy[0] + + if quality < minQualityForHqContextModeling { + /* 3 context models is a bit slower, don't use it at lower qualities. */ + entropy[3] = entropy[1] * 10 + } + + /* If expected savings by symbol are less than 0.2 bits, skip the + context modeling -- in exchange for faster decoding speed. */ + if entropy[1]-entropy[2] < 0.2 && entropy[1]-entropy[3] < 0.2 { + *num_literal_contexts = 1 + } else if entropy[2]-entropy[3] < 0.02 { + *num_literal_contexts = 2 + *literal_context_map = kStaticContextMapSimpleUTF8[:] + } else { + *num_literal_contexts = 3 + *literal_context_map = kStaticContextMapContinuation[:] + } +} + +/* Decide if we want to use a more complex static context map containing 13 + context values, based on the entropy reduction of histograms over the + first 5 bits of literals. */ + +var kStaticContextMapComplexUTF8 = [64]uint32{ + 11, 11, 12, 12, /* 0 special */ + 0, 0, 0, 0, /* 4 lf */ + 1, 1, 9, 9, /* 8 space */ + 2, 2, 2, 2, /* !, first after space/lf and after something else. */ + 1, 1, 1, 1, /* " */ + 8, 3, 3, 3, /* % */ + 1, 1, 1, 1, /* ({[ */ + 2, 2, 2, 2, /* }]) */ + 8, 4, 4, 4, /* :; */ + 8, 7, 4, 4, /* . */ + 8, 0, 0, 0, /* > */ + 3, 3, 3, 3, /* [0..9] */ + 5, 5, 10, 5, /* [A-Z] */ + 5, 5, 10, 5, + 6, 6, 6, 6, /* [a-z] */ + 6, 6, 6, 6, +} + +func shouldUseComplexStaticContextMap(input []byte, start_pos uint, length uint, mask uint, quality int, size_hint uint, num_literal_contexts *uint, literal_context_map *[]uint32) bool { + /* Try the more complex static context map only for long data. */ + if size_hint < 1<<20 { + return false + } else { + var end_pos uint = start_pos + length + var combined_histo = [32]uint32{0} + var context_histo = [13][32]uint32{[32]uint32{0}} + var total uint32 = 0 + var entropy [3]float64 + var dummy uint + var i uint + var utf8_lut contextLUT = getContextLUT(contextUTF8) + /* To make entropy calculations faster and to fit on the stack, we collect + histograms over the 5 most significant bits of literals. One histogram + without context and 13 additional histograms for each context value. */ + for ; start_pos+64 <= end_pos; start_pos += 4096 { + var stride_end_pos uint = start_pos + 64 + var prev2 byte = input[start_pos&mask] + var prev1 byte = input[(start_pos+1)&mask] + var pos uint + + /* To make the analysis of the data faster we only examine 64 byte long + strides at every 4kB intervals. */ + for pos = start_pos + 2; pos < stride_end_pos; pos++ { + var literal byte = input[pos&mask] + var context byte = byte(kStaticContextMapComplexUTF8[getContext(prev1, prev2, utf8_lut)]) + total++ + combined_histo[literal>>3]++ + context_histo[context][literal>>3]++ + prev2 = prev1 + prev1 = literal + } + } + + entropy[1] = shannonEntropy(combined_histo[:], 32, &dummy) + entropy[2] = 0 + for i = 0; i < 13; i++ { + entropy[2] += shannonEntropy(context_histo[i][0:], 32, &dummy) + } + + entropy[0] = 1.0 / float64(total) + entropy[1] *= entropy[0] + entropy[2] *= entropy[0] + + /* The triggering heuristics below were tuned by compressing the individual + files of the silesia corpus. If we skip this kind of context modeling + for not very well compressible input (i.e. entropy using context modeling + is 60% of maximal entropy) or if expected savings by symbol are less + than 0.2 bits, then in every case when it triggers, the final compression + ratio is improved. Note however that this heuristics might be too strict + for some cases and could be tuned further. */ + if entropy[2] > 3.0 || entropy[1]-entropy[2] < 0.2 { + return false + } else { + *num_literal_contexts = 13 + *literal_context_map = kStaticContextMapComplexUTF8[:] + return true + } + } +} + +func decideOverLiteralContextModeling(input []byte, start_pos uint, length uint, mask uint, quality int, size_hint uint, num_literal_contexts *uint, literal_context_map *[]uint32) { + if quality < minQualityForContextModeling || length < 64 { + return + } else if shouldUseComplexStaticContextMap(input, start_pos, length, mask, quality, size_hint, num_literal_contexts, literal_context_map) { + } else /* Context map was already set, nothing else to do. */ + { + var end_pos uint = start_pos + length + /* Gather bi-gram data of the UTF8 byte prefixes. To make the analysis of + UTF8 data faster we only examine 64 byte long strides at every 4kB + intervals. */ + + var bigram_prefix_histo = [9]uint32{0} + for ; start_pos+64 <= end_pos; start_pos += 4096 { + var lut = [4]int{0, 0, 1, 2} + var stride_end_pos uint = start_pos + 64 + var prev int = lut[input[start_pos&mask]>>6] * 3 + var pos uint + for pos = start_pos + 1; pos < stride_end_pos; pos++ { + var literal byte = input[pos&mask] + bigram_prefix_histo[prev+lut[literal>>6]]++ + prev = lut[literal>>6] * 3 + } + } + + chooseContextMap(quality, bigram_prefix_histo[0:], num_literal_contexts, literal_context_map) + } +} + +func shouldCompress_encode(data []byte, mask uint, last_flush_pos uint64, bytes uint, num_literals uint, num_commands uint) bool { + /* TODO: find more precise minimal block overhead. */ + if bytes <= 2 { + return false + } + if num_commands < (bytes>>8)+2 { + if float64(num_literals) > 0.99*float64(bytes) { + var literal_histo = [256]uint32{0} + const kSampleRate uint32 = 13 + const kMinEntropy float64 = 7.92 + var bit_cost_threshold float64 = float64(bytes) * kMinEntropy / float64(kSampleRate) + var t uint = uint((uint32(bytes) + kSampleRate - 1) / kSampleRate) + var pos uint32 = uint32(last_flush_pos) + var i uint + for i = 0; i < t; i++ { + literal_histo[data[pos&uint32(mask)]]++ + pos += kSampleRate + } + + if bitsEntropy(literal_histo[:], 256) > bit_cost_threshold { + return false + } + } + } + + return true +} + +/* Chooses the literal context mode for a metablock */ +func chooseContextMode(params *encoderParams, data []byte, pos uint, mask uint, length uint) int { + /* We only do the computation for the option of something else than + CONTEXT_UTF8 for the highest qualities */ + if params.quality >= minQualityForHqBlockSplitting && !isMostlyUTF8(data, pos, mask, length, kMinUTF8Ratio) { + return contextSigned + } + + return contextUTF8 +} + +func writeMetaBlockInternal(data []byte, mask uint, last_flush_pos uint64, bytes uint, is_last bool, literal_context_mode int, params *encoderParams, prev_byte byte, prev_byte2 byte, num_literals uint, commands []command, saved_dist_cache []int, dist_cache []int, storage_ix *uint, storage []byte) { + var wrapped_last_flush_pos uint32 = wrapPosition(last_flush_pos) + var last_bytes uint16 + var last_bytes_bits byte + var literal_context_lut contextLUT = getContextLUT(literal_context_mode) + var block_params encoderParams = *params + + if bytes == 0 { + /* Write the ISLAST and ISEMPTY bits. */ + writeBits(2, 3, storage_ix, storage) + + *storage_ix = (*storage_ix + 7) &^ 7 + return + } + + if !shouldCompress_encode(data, mask, last_flush_pos, bytes, num_literals, uint(len(commands))) { + /* Restore the distance cache, as its last update by + CreateBackwardReferences is now unused. */ + copy(dist_cache, saved_dist_cache[:4]) + + storeUncompressedMetaBlock(is_last, data, uint(wrapped_last_flush_pos), mask, bytes, storage_ix, storage) + return + } + + assert(*storage_ix <= 14) + last_bytes = uint16(storage[1])<<8 | uint16(storage[0]) + last_bytes_bits = byte(*storage_ix) + if params.quality <= maxQualityForStaticEntropyCodes { + storeMetaBlockFast(data, uint(wrapped_last_flush_pos), bytes, mask, is_last, params, commands, storage_ix, storage) + } else if params.quality < minQualityForBlockSplit { + storeMetaBlockTrivial(data, uint(wrapped_last_flush_pos), bytes, mask, is_last, params, commands, storage_ix, storage) + } else { + mb := getMetaBlockSplit() + if params.quality < minQualityForHqBlockSplitting { + var num_literal_contexts uint = 1 + var literal_context_map []uint32 = nil + if !params.disable_literal_context_modeling { + decideOverLiteralContextModeling(data, uint(wrapped_last_flush_pos), bytes, mask, params.quality, params.size_hint, &num_literal_contexts, &literal_context_map) + } + + buildMetaBlockGreedy(data, uint(wrapped_last_flush_pos), mask, prev_byte, prev_byte2, literal_context_lut, num_literal_contexts, literal_context_map, commands, mb) + } else { + buildMetaBlock(data, uint(wrapped_last_flush_pos), mask, &block_params, prev_byte, prev_byte2, commands, literal_context_mode, mb) + } + + if params.quality >= minQualityForOptimizeHistograms { + /* The number of distance symbols effectively used for distance + histograms. It might be less than distance alphabet size + for "Large Window Brotli" (32-bit). */ + var num_effective_dist_codes uint32 = block_params.dist.alphabet_size + if num_effective_dist_codes > numHistogramDistanceSymbols { + num_effective_dist_codes = numHistogramDistanceSymbols + } + + optimizeHistograms(num_effective_dist_codes, mb) + } + + storeMetaBlock(data, uint(wrapped_last_flush_pos), bytes, mask, prev_byte, prev_byte2, is_last, &block_params, literal_context_mode, commands, mb, storage_ix, storage) + freeMetaBlockSplit(mb) + } + + if bytes+4 < *storage_ix>>3 { + /* Restore the distance cache and last byte. */ + copy(dist_cache, saved_dist_cache[:4]) + + storage[0] = byte(last_bytes) + storage[1] = byte(last_bytes >> 8) + *storage_ix = uint(last_bytes_bits) + storeUncompressedMetaBlock(is_last, data, uint(wrapped_last_flush_pos), mask, bytes, storage_ix, storage) + } +} + +func chooseDistanceParams(params *encoderParams) { + var distance_postfix_bits uint32 = 0 + var num_direct_distance_codes uint32 = 0 + + if params.quality >= minQualityForNonzeroDistanceParams { + var ndirect_msb uint32 + if params.mode == modeFont { + distance_postfix_bits = 1 + num_direct_distance_codes = 12 + } else { + distance_postfix_bits = params.dist.distance_postfix_bits + num_direct_distance_codes = params.dist.num_direct_distance_codes + } + + ndirect_msb = (num_direct_distance_codes >> distance_postfix_bits) & 0x0F + if distance_postfix_bits > maxNpostfix || num_direct_distance_codes > maxNdirect || ndirect_msb<>25)), (last_command.dist_prefix_&0x3FF == 0), &last_command.cmd_prefix_) + } +} + +/* + Processes the accumulated input data and writes + the new output meta-block to s.dest, if one has been + created (otherwise the processed input data is buffered internally). + If |is_last| or |force_flush| is true, an output meta-block is + always created. However, until |is_last| is true encoder may retain up + to 7 bits of the last byte of output. To force encoder to dump the remaining + bits use WriteMetadata() to append an empty meta-data block. + Returns false if the size of the input data is larger than + input_block_size(). +*/ +func encodeData(s *Writer, is_last bool, force_flush bool) bool { + var delta uint64 = unprocessedInputSize(s) + var bytes uint32 = uint32(delta) + var wrapped_last_processed_pos uint32 = wrapPosition(s.last_processed_pos_) + var data []byte + var mask uint32 + var literal_context_mode int + + data = s.ringbuffer_.buffer_ + mask = s.ringbuffer_.mask_ + + /* Adding more blocks after "last" block is forbidden. */ + if s.is_last_block_emitted_ { + return false + } + if is_last { + s.is_last_block_emitted_ = true + } + + if delta > uint64(inputBlockSize(s)) { + return false + } + + if s.params.quality == fastTwoPassCompressionQuality { + if s.command_buf_ == nil || cap(s.command_buf_) < int(kCompressFragmentTwoPassBlockSize) { + s.command_buf_ = make([]uint32, kCompressFragmentTwoPassBlockSize) + s.literal_buf_ = make([]byte, kCompressFragmentTwoPassBlockSize) + } else { + s.command_buf_ = s.command_buf_[:kCompressFragmentTwoPassBlockSize] + s.literal_buf_ = s.literal_buf_[:kCompressFragmentTwoPassBlockSize] + } + } + + if s.params.quality == fastOnePassCompressionQuality || s.params.quality == fastTwoPassCompressionQuality { + var storage []byte + var storage_ix uint = uint(s.last_bytes_bits_) + var table_size uint + var table []int + + if delta == 0 && !is_last { + /* We have no new input data and we don't have to finish the stream, so + nothing to do. */ + return true + } + + storage = s.getStorage(int(2*bytes + 503)) + storage[0] = byte(s.last_bytes_) + storage[1] = byte(s.last_bytes_ >> 8) + table = getHashTable(s, s.params.quality, uint(bytes), &table_size) + if s.params.quality == fastOnePassCompressionQuality { + compressFragmentFast(data[wrapped_last_processed_pos&mask:], uint(bytes), is_last, table, table_size, s.cmd_depths_[:], s.cmd_bits_[:], &s.cmd_code_numbits_, s.cmd_code_[:], &storage_ix, storage) + } else { + compressFragmentTwoPass(data[wrapped_last_processed_pos&mask:], uint(bytes), is_last, s.command_buf_, s.literal_buf_, table, table_size, &storage_ix, storage) + } + + s.last_bytes_ = uint16(storage[storage_ix>>3]) + s.last_bytes_bits_ = byte(storage_ix & 7) + updateLastProcessedPos(s) + s.writeOutput(storage[:storage_ix>>3]) + return true + } + { + /* Theoretical max number of commands is 1 per 2 bytes. */ + newsize := len(s.commands) + int(bytes)/2 + 1 + if newsize > cap(s.commands) { + /* Reserve a bit more memory to allow merging with a next block + without reallocation: that would impact speed. */ + newsize += int(bytes/4) + 16 + + new_commands := make([]command, len(s.commands), newsize) + if s.commands != nil { + copy(new_commands, s.commands) + } + + s.commands = new_commands + } + } + + initOrStitchToPreviousBlock(&s.hasher_, data, uint(mask), &s.params, uint(wrapped_last_processed_pos), uint(bytes), is_last) + + literal_context_mode = chooseContextMode(&s.params, data, uint(wrapPosition(s.last_flush_pos_)), uint(mask), uint(s.input_pos_-s.last_flush_pos_)) + + if len(s.commands) != 0 && s.last_insert_len_ == 0 { + extendLastCommand(s, &bytes, &wrapped_last_processed_pos) + } + + if s.params.quality == zopflificationQuality { + assert(s.params.hasher.type_ == 10) + createZopfliBackwardReferences(uint(bytes), uint(wrapped_last_processed_pos), data, uint(mask), &s.params, s.hasher_.(*h10), s.dist_cache_[:], &s.last_insert_len_, &s.commands, &s.num_literals_) + } else if s.params.quality == hqZopflificationQuality { + assert(s.params.hasher.type_ == 10) + createHqZopfliBackwardReferences(uint(bytes), uint(wrapped_last_processed_pos), data, uint(mask), &s.params, s.hasher_, s.dist_cache_[:], &s.last_insert_len_, &s.commands, &s.num_literals_) + } else { + createBackwardReferences(uint(bytes), uint(wrapped_last_processed_pos), data, uint(mask), &s.params, s.hasher_, s.dist_cache_[:], &s.last_insert_len_, &s.commands, &s.num_literals_) + } + { + var max_length uint = maxMetablockSize(&s.params) + var max_literals uint = max_length / 8 + max_commands := int(max_length / 8) + var processed_bytes uint = uint(s.input_pos_ - s.last_flush_pos_) + var next_input_fits_metablock bool = (processed_bytes+inputBlockSize(s) <= max_length) + var should_flush bool = (s.params.quality < minQualityForBlockSplit && s.num_literals_+uint(len(s.commands)) >= maxNumDelayedSymbols) + /* If maximal possible additional block doesn't fit metablock, flush now. */ + /* TODO: Postpone decision until next block arrives? */ + + /* If block splitting is not used, then flush as soon as there is some + amount of commands / literals produced. */ + if !is_last && !force_flush && !should_flush && next_input_fits_metablock && s.num_literals_ < max_literals && len(s.commands) < max_commands { + /* Merge with next input block. Everything will happen later. */ + if updateLastProcessedPos(s) { + hasherReset(s.hasher_) + } + + return true + } + } + + /* Create the last insert-only command. */ + if s.last_insert_len_ > 0 { + s.commands = append(s.commands, makeInsertCommand(s.last_insert_len_)) + s.num_literals_ += s.last_insert_len_ + s.last_insert_len_ = 0 + } + + if !is_last && s.input_pos_ == s.last_flush_pos_ { + /* We have no new input data and we don't have to finish the stream, so + nothing to do. */ + return true + } + + assert(s.input_pos_ >= s.last_flush_pos_) + assert(s.input_pos_ > s.last_flush_pos_ || is_last) + assert(s.input_pos_-s.last_flush_pos_ <= 1<<24) + { + var metablock_size uint32 = uint32(s.input_pos_ - s.last_flush_pos_) + var storage []byte = s.getStorage(int(2*metablock_size + 503)) + var storage_ix uint = uint(s.last_bytes_bits_) + storage[0] = byte(s.last_bytes_) + storage[1] = byte(s.last_bytes_ >> 8) + writeMetaBlockInternal(data, uint(mask), s.last_flush_pos_, uint(metablock_size), is_last, literal_context_mode, &s.params, s.prev_byte_, s.prev_byte2_, s.num_literals_, s.commands, s.saved_dist_cache_[:], s.dist_cache_[:], &storage_ix, storage) + s.last_bytes_ = uint16(storage[storage_ix>>3]) + s.last_bytes_bits_ = byte(storage_ix & 7) + s.last_flush_pos_ = s.input_pos_ + if updateLastProcessedPos(s) { + hasherReset(s.hasher_) + } + + if s.last_flush_pos_ > 0 { + s.prev_byte_ = data[(uint32(s.last_flush_pos_)-1)&mask] + } + + if s.last_flush_pos_ > 1 { + s.prev_byte2_ = data[uint32(s.last_flush_pos_-2)&mask] + } + + s.commands = s.commands[:0] + s.num_literals_ = 0 + + /* Save the state of the distance cache in case we need to restore it for + emitting an uncompressed block. */ + copy(s.saved_dist_cache_[:], s.dist_cache_[:]) + + s.writeOutput(storage[:storage_ix>>3]) + return true + } +} + +/* Dumps remaining output bits and metadata header to |header|. + Returns number of produced bytes. + REQUIRED: |header| should be 8-byte aligned and at least 16 bytes long. + REQUIRED: |block_size| <= (1 << 24). */ +func writeMetadataHeader(s *Writer, block_size uint, header []byte) uint { + storage_ix := uint(s.last_bytes_bits_) + header[0] = byte(s.last_bytes_) + header[1] = byte(s.last_bytes_ >> 8) + s.last_bytes_ = 0 + s.last_bytes_bits_ = 0 + + writeBits(1, 0, &storage_ix, header) + writeBits(2, 3, &storage_ix, header) + writeBits(1, 0, &storage_ix, header) + if block_size == 0 { + writeBits(2, 0, &storage_ix, header) + } else { + var nbits uint32 + if block_size == 1 { + nbits = 0 + } else { + nbits = log2FloorNonZero(uint(uint32(block_size)-1)) + 1 + } + var nbytes uint32 = (nbits + 7) / 8 + writeBits(2, uint64(nbytes), &storage_ix, header) + writeBits(uint(8*nbytes), uint64(block_size)-1, &storage_ix, header) + } + + return (storage_ix + 7) >> 3 +} + +func injectBytePaddingBlock(s *Writer) { + var seal uint32 = uint32(s.last_bytes_) + var seal_bits uint = uint(s.last_bytes_bits_) + s.last_bytes_ = 0 + s.last_bytes_bits_ = 0 + + /* is_last = 0, data_nibbles = 11, reserved = 0, meta_nibbles = 00 */ + seal |= 0x6 << seal_bits + + seal_bits += 6 + + destination := s.tiny_buf_.u8[:] + + destination[0] = byte(seal) + if seal_bits > 8 { + destination[1] = byte(seal >> 8) + } + if seal_bits > 16 { + destination[2] = byte(seal >> 16) + } + s.writeOutput(destination[:(seal_bits+7)>>3]) +} + +func checkFlushComplete(s *Writer) { + if s.stream_state_ == streamFlushRequested && s.err == nil { + s.stream_state_ = streamProcessing + } +} + +func encoderCompressStreamFast(s *Writer, op int, available_in *uint, next_in *[]byte) bool { + var block_size_limit uint = uint(1) << s.params.lgwin + var buf_size uint = brotli_min_size_t(kCompressFragmentTwoPassBlockSize, brotli_min_size_t(*available_in, block_size_limit)) + var command_buf []uint32 = nil + var literal_buf []byte = nil + if s.params.quality != fastOnePassCompressionQuality && s.params.quality != fastTwoPassCompressionQuality { + return false + } + + if s.params.quality == fastTwoPassCompressionQuality { + if s.command_buf_ == nil || cap(s.command_buf_) < int(buf_size) { + s.command_buf_ = make([]uint32, buf_size) + s.literal_buf_ = make([]byte, buf_size) + } else { + s.command_buf_ = s.command_buf_[:buf_size] + s.literal_buf_ = s.literal_buf_[:buf_size] + } + + command_buf = s.command_buf_ + literal_buf = s.literal_buf_ + } + + for { + if s.stream_state_ == streamFlushRequested && s.last_bytes_bits_ != 0 { + injectBytePaddingBlock(s) + continue + } + + /* Compress block only when stream is not + finished, there is no pending flush request, and there is either + additional input or pending operation. */ + if s.stream_state_ == streamProcessing && (*available_in != 0 || op != int(operationProcess)) { + var block_size uint = brotli_min_size_t(block_size_limit, *available_in) + var is_last bool = (*available_in == block_size) && (op == int(operationFinish)) + var force_flush bool = (*available_in == block_size) && (op == int(operationFlush)) + var max_out_size uint = 2*block_size + 503 + var storage []byte = nil + var storage_ix uint = uint(s.last_bytes_bits_) + var table_size uint + var table []int + + if force_flush && block_size == 0 { + s.stream_state_ = streamFlushRequested + continue + } + + storage = s.getStorage(int(max_out_size)) + + storage[0] = byte(s.last_bytes_) + storage[1] = byte(s.last_bytes_ >> 8) + table = getHashTable(s, s.params.quality, block_size, &table_size) + + if s.params.quality == fastOnePassCompressionQuality { + compressFragmentFast(*next_in, block_size, is_last, table, table_size, s.cmd_depths_[:], s.cmd_bits_[:], &s.cmd_code_numbits_, s.cmd_code_[:], &storage_ix, storage) + } else { + compressFragmentTwoPass(*next_in, block_size, is_last, command_buf, literal_buf, table, table_size, &storage_ix, storage) + } + + *next_in = (*next_in)[block_size:] + *available_in -= block_size + var out_bytes uint = storage_ix >> 3 + s.writeOutput(storage[:out_bytes]) + + s.last_bytes_ = uint16(storage[storage_ix>>3]) + s.last_bytes_bits_ = byte(storage_ix & 7) + + if force_flush { + s.stream_state_ = streamFlushRequested + } + if is_last { + s.stream_state_ = streamFinished + } + continue + } + + break + } + + checkFlushComplete(s) + return true +} + +func processMetadata(s *Writer, available_in *uint, next_in *[]byte) bool { + if *available_in > 1<<24 { + return false + } + + /* Switch to metadata block workflow, if required. */ + if s.stream_state_ == streamProcessing { + s.remaining_metadata_bytes_ = uint32(*available_in) + s.stream_state_ = streamMetadataHead + } + + if s.stream_state_ != streamMetadataHead && s.stream_state_ != streamMetadataBody { + return false + } + + for { + if s.stream_state_ == streamFlushRequested && s.last_bytes_bits_ != 0 { + injectBytePaddingBlock(s) + continue + } + + if s.input_pos_ != s.last_flush_pos_ { + var result bool = encodeData(s, false, true) + if !result { + return false + } + continue + } + + if s.stream_state_ == streamMetadataHead { + n := writeMetadataHeader(s, uint(s.remaining_metadata_bytes_), s.tiny_buf_.u8[:]) + s.writeOutput(s.tiny_buf_.u8[:n]) + s.stream_state_ = streamMetadataBody + continue + } else { + /* Exit workflow only when there is no more input and no more output. + Otherwise client may continue producing empty metadata blocks. */ + if s.remaining_metadata_bytes_ == 0 { + s.remaining_metadata_bytes_ = math.MaxUint32 + s.stream_state_ = streamProcessing + break + } + + /* This guarantees progress in "TakeOutput" workflow. */ + var c uint32 = brotli_min_uint32_t(s.remaining_metadata_bytes_, 16) + copy(s.tiny_buf_.u8[:], (*next_in)[:c]) + *next_in = (*next_in)[c:] + *available_in -= uint(c) + s.remaining_metadata_bytes_ -= c + s.writeOutput(s.tiny_buf_.u8[:c]) + + continue + } + } + + return true +} + +func updateSizeHint(s *Writer, available_in uint) { + if s.params.size_hint == 0 { + var delta uint64 = unprocessedInputSize(s) + var tail uint64 = uint64(available_in) + var limit uint32 = 1 << 30 + var total uint32 + if (delta >= uint64(limit)) || (tail >= uint64(limit)) || ((delta + tail) >= uint64(limit)) { + total = limit + } else { + total = uint32(delta + tail) + } + + s.params.size_hint = uint(total) + } +} + +func encoderCompressStream(s *Writer, op int, available_in *uint, next_in *[]byte) bool { + if !ensureInitialized(s) { + return false + } + + /* Unfinished metadata block; check requirements. */ + if s.remaining_metadata_bytes_ != math.MaxUint32 { + if uint32(*available_in) != s.remaining_metadata_bytes_ { + return false + } + if op != int(operationEmitMetadata) { + return false + } + } + + if op == int(operationEmitMetadata) { + updateSizeHint(s, 0) /* First data metablock might be emitted here. */ + return processMetadata(s, available_in, next_in) + } + + if s.stream_state_ == streamMetadataHead || s.stream_state_ == streamMetadataBody { + return false + } + + if s.stream_state_ != streamProcessing && *available_in != 0 { + return false + } + + if s.params.quality == fastOnePassCompressionQuality || s.params.quality == fastTwoPassCompressionQuality { + return encoderCompressStreamFast(s, op, available_in, next_in) + } + + for { + var remaining_block_size uint = remainingInputBlockSize(s) + + if remaining_block_size != 0 && *available_in != 0 { + var copy_input_size uint = brotli_min_size_t(remaining_block_size, *available_in) + copyInputToRingBuffer(s, copy_input_size, *next_in) + *next_in = (*next_in)[copy_input_size:] + *available_in -= copy_input_size + continue + } + + if s.stream_state_ == streamFlushRequested && s.last_bytes_bits_ != 0 { + injectBytePaddingBlock(s) + continue + } + + /* Compress data only when stream is not + finished and there is no pending flush request. */ + if s.stream_state_ == streamProcessing { + if remaining_block_size == 0 || op != int(operationProcess) { + var is_last bool = ((*available_in == 0) && op == int(operationFinish)) + var force_flush bool = ((*available_in == 0) && op == int(operationFlush)) + var result bool + updateSizeHint(s, *available_in) + result = encodeData(s, is_last, force_flush) + if !result { + return false + } + if force_flush { + s.stream_state_ = streamFlushRequested + } + if is_last { + s.stream_state_ = streamFinished + } + continue + } + } + + break + } + + checkFlushComplete(s) + return true +} + +func (w *Writer) writeOutput(data []byte) { + if w.err != nil { + return + } + + _, w.err = w.dst.Write(data) + if w.err == nil { + checkFlushComplete(w) + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/encoder.go b/backend/vendor/github.com/andybalholm/brotli/encoder.go new file mode 100644 index 0000000..1928382 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/encoder.go @@ -0,0 +1,177 @@ +package brotli + +import "github.com/andybalholm/brotli/matchfinder" + +// An Encoder implements the matchfinder.Encoder interface, writing in Brotli format. +type Encoder struct { + wroteHeader bool + bw bitWriter + distCache []distanceCode +} + +func (e *Encoder) Reset() { + e.wroteHeader = false + e.bw = bitWriter{} +} + +func (e *Encoder) Encode(dst []byte, src []byte, matches []matchfinder.Match, lastBlock bool) []byte { + e.bw.dst = dst + if !e.wroteHeader { + e.bw.writeBits(4, 15) + e.wroteHeader = true + } + + if len(src) == 0 { + if lastBlock { + e.bw.writeBits(2, 3) // islast + isempty + e.bw.jumpToByteBoundary() + return e.bw.dst + } + return dst + } + + var literalHisto [256]uint32 + var commandHisto [704]uint32 + var distanceHisto [64]uint32 + literalCount := 0 + commandCount := 0 + distanceCount := 0 + + if len(e.distCache) < len(matches) { + e.distCache = make([]distanceCode, len(matches)) + } + + // first pass: build the histograms + pos := 0 + + // d is the ring buffer of the last 4 distances. + d := [4]int{-10, -10, -10, -10} + for i, m := range matches { + if m.Unmatched > 0 { + for _, c := range src[pos : pos+m.Unmatched] { + literalHisto[c]++ + } + literalCount += m.Unmatched + } + + insertCode := getInsertLengthCode(uint(m.Unmatched)) + copyCode := getCopyLengthCode(uint(m.Length)) + if m.Length == 0 { + // If the stream ends with unmatched bytes, we need a dummy copy length. + copyCode = 2 + } + command := combineLengthCodes(insertCode, copyCode, false) + commandHisto[command]++ + commandCount++ + + if command >= 128 && m.Length != 0 { + var distCode distanceCode + switch m.Distance { + case d[3]: + distCode.code = 0 + case d[2]: + distCode.code = 1 + case d[1]: + distCode.code = 2 + case d[0]: + distCode.code = 3 + case d[3] - 1: + distCode.code = 4 + case d[3] + 1: + distCode.code = 5 + case d[3] - 2: + distCode.code = 6 + case d[3] + 2: + distCode.code = 7 + case d[3] - 3: + distCode.code = 8 + case d[3] + 3: + distCode.code = 9 + + // In my testing, codes 10–15 actually reduced the compression ratio. + + default: + distCode = getDistanceCode(m.Distance) + } + e.distCache[i] = distCode + distanceHisto[distCode.code]++ + distanceCount++ + if distCode.code != 0 { + d[0], d[1], d[2], d[3] = d[1], d[2], d[3], m.Distance + } + } + + pos += m.Unmatched + m.Length + } + + storeMetaBlockHeaderBW(uint(len(src)), false, &e.bw) + e.bw.writeBits(13, 0) + + var literalDepths [256]byte + var literalBits [256]uint16 + buildAndStoreHuffmanTreeFastBW(literalHisto[:], uint(literalCount), 8, literalDepths[:], literalBits[:], &e.bw) + + var commandDepths [704]byte + var commandBits [704]uint16 + buildAndStoreHuffmanTreeFastBW(commandHisto[:], uint(commandCount), 10, commandDepths[:], commandBits[:], &e.bw) + + var distanceDepths [64]byte + var distanceBits [64]uint16 + buildAndStoreHuffmanTreeFastBW(distanceHisto[:], uint(distanceCount), 6, distanceDepths[:], distanceBits[:], &e.bw) + + pos = 0 + for i, m := range matches { + insertCode := getInsertLengthCode(uint(m.Unmatched)) + copyCode := getCopyLengthCode(uint(m.Length)) + if m.Length == 0 { + // If the stream ends with unmatched bytes, we need a dummy copy length. + copyCode = 2 + } + command := combineLengthCodes(insertCode, copyCode, false) + e.bw.writeBits(uint(commandDepths[command]), uint64(commandBits[command])) + if kInsExtra[insertCode] > 0 { + e.bw.writeBits(uint(kInsExtra[insertCode]), uint64(m.Unmatched)-uint64(kInsBase[insertCode])) + } + if kCopyExtra[copyCode] > 0 { + e.bw.writeBits(uint(kCopyExtra[copyCode]), uint64(m.Length)-uint64(kCopyBase[copyCode])) + } + + if m.Unmatched > 0 { + for _, c := range src[pos : pos+m.Unmatched] { + e.bw.writeBits(uint(literalDepths[c]), uint64(literalBits[c])) + } + } + + if command >= 128 && m.Length != 0 { + distCode := e.distCache[i] + e.bw.writeBits(uint(distanceDepths[distCode.code]), uint64(distanceBits[distCode.code])) + if distCode.nExtra > 0 { + e.bw.writeBits(distCode.nExtra, distCode.extraBits) + } + } + + pos += m.Unmatched + m.Length + } + + if lastBlock { + e.bw.writeBits(2, 3) // islast + isempty + e.bw.jumpToByteBoundary() + } + return e.bw.dst +} + +type distanceCode struct { + code int + nExtra uint + extraBits uint64 +} + +func getDistanceCode(distance int) distanceCode { + d := distance + 3 + nbits := log2FloorNonZero(uint(d)) - 1 + prefix := (d >> nbits) & 1 + offset := (2 + prefix) << nbits + distcode := int(2*(nbits-1)) + prefix + 16 + extra := d - offset + return distanceCode{distcode, uint(nbits), uint64(extra)} +} diff --git a/backend/vendor/github.com/andybalholm/brotli/encoder_dict.go b/backend/vendor/github.com/andybalholm/brotli/encoder_dict.go new file mode 100644 index 0000000..55c051c --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/encoder_dict.go @@ -0,0 +1,22 @@ +package brotli + +/* Dictionary data (words and transforms) for 1 possible context */ +type encoderDictionary struct { + words *dictionary + cutoffTransformsCount uint32 + cutoffTransforms uint64 + hash_table []uint16 + buckets []uint16 + dict_words []dictWord +} + +func initEncoderDictionary(dict *encoderDictionary) { + dict.words = getDictionary() + + dict.hash_table = kStaticDictionaryHash[:] + dict.buckets = kStaticDictionaryBuckets[:] + dict.dict_words = kStaticDictionaryWords[:] + + dict.cutoffTransformsCount = kCutoffTransformsCount + dict.cutoffTransforms = kCutoffTransforms +} diff --git a/backend/vendor/github.com/andybalholm/brotli/entropy_encode.go b/backend/vendor/github.com/andybalholm/brotli/entropy_encode.go new file mode 100644 index 0000000..3f469a3 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/entropy_encode.go @@ -0,0 +1,592 @@ +package brotli + +import "math" + +/* Copyright 2010 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Entropy encoding (Huffman) utilities. */ + +/* A node of a Huffman tree. */ +type huffmanTree struct { + total_count_ uint32 + index_left_ int16 + index_right_or_value_ int16 +} + +func initHuffmanTree(self *huffmanTree, count uint32, left int16, right int16) { + self.total_count_ = count + self.index_left_ = left + self.index_right_or_value_ = right +} + +/* Input size optimized Shell sort. */ +type huffmanTreeComparator func(huffmanTree, huffmanTree) bool + +var sortHuffmanTreeItems_gaps = []uint{132, 57, 23, 10, 4, 1} + +func sortHuffmanTreeItems(items []huffmanTree, n uint, comparator huffmanTreeComparator) { + if n < 13 { + /* Insertion sort. */ + var i uint + for i = 1; i < n; i++ { + var tmp huffmanTree = items[i] + var k uint = i + var j uint = i - 1 + for comparator(tmp, items[j]) { + items[k] = items[j] + k = j + if j == 0 { + break + } + j-- + } + + items[k] = tmp + } + + return + } else { + var g int + if n < 57 { + g = 2 + } else { + g = 0 + } + for ; g < 6; g++ { + var gap uint = sortHuffmanTreeItems_gaps[g] + var i uint + for i = gap; i < n; i++ { + var j uint = i + var tmp huffmanTree = items[i] + for ; j >= gap && comparator(tmp, items[j-gap]); j -= gap { + items[j] = items[j-gap] + } + + items[j] = tmp + } + } + } +} + +/* Returns 1 if assignment of depths succeeded, otherwise 0. */ +func setDepth(p0 int, pool []huffmanTree, depth []byte, max_depth int) bool { + var stack [16]int + var level int = 0 + var p int = p0 + assert(max_depth <= 15) + stack[0] = -1 + for { + if pool[p].index_left_ >= 0 { + level++ + if level > max_depth { + return false + } + stack[level] = int(pool[p].index_right_or_value_) + p = int(pool[p].index_left_) + continue + } else { + depth[pool[p].index_right_or_value_] = byte(level) + } + + for level >= 0 && stack[level] == -1 { + level-- + } + if level < 0 { + return true + } + p = stack[level] + stack[level] = -1 + } +} + +/* Sort the root nodes, least popular first. */ +func sortHuffmanTree(v0 huffmanTree, v1 huffmanTree) bool { + if v0.total_count_ != v1.total_count_ { + return v0.total_count_ < v1.total_count_ + } + + return v0.index_right_or_value_ > v1.index_right_or_value_ +} + +/* This function will create a Huffman tree. + + The catch here is that the tree cannot be arbitrarily deep. + Brotli specifies a maximum depth of 15 bits for "code trees" + and 7 bits for "code length code trees." + + count_limit is the value that is to be faked as the minimum value + and this minimum value is raised until the tree matches the + maximum length requirement. + + This algorithm is not of excellent performance for very long data blocks, + especially when population counts are longer than 2**tree_limit, but + we are not planning to use this with extremely long blocks. + + See http://en.wikipedia.org/wiki/Huffman_coding */ +func createHuffmanTree(data []uint32, length uint, tree_limit int, tree []huffmanTree, depth []byte) { + var count_limit uint32 + var sentinel huffmanTree + initHuffmanTree(&sentinel, math.MaxUint32, -1, -1) + + /* For block sizes below 64 kB, we never need to do a second iteration + of this loop. Probably all of our block sizes will be smaller than + that, so this loop is mostly of academic interest. If we actually + would need this, we would be better off with the Katajainen algorithm. */ + for count_limit = 1; ; count_limit *= 2 { + var n uint = 0 + var i uint + var j uint + var k uint + for i = length; i != 0; { + i-- + if data[i] != 0 { + var count uint32 = brotli_max_uint32_t(data[i], count_limit) + initHuffmanTree(&tree[n], count, -1, int16(i)) + n++ + } + } + + if n == 1 { + depth[tree[0].index_right_or_value_] = 1 /* Only one element. */ + break + } + + sortHuffmanTreeItems(tree, n, huffmanTreeComparator(sortHuffmanTree)) + + /* The nodes are: + [0, n): the sorted leaf nodes that we start with. + [n]: we add a sentinel here. + [n + 1, 2n): new parent nodes are added here, starting from + (n+1). These are naturally in ascending order. + [2n]: we add a sentinel at the end as well. + There will be (2n+1) elements at the end. */ + tree[n] = sentinel + + tree[n+1] = sentinel + + i = 0 /* Points to the next leaf node. */ + j = n + 1 /* Points to the next non-leaf node. */ + for k = n - 1; k != 0; k-- { + var left uint + var right uint + if tree[i].total_count_ <= tree[j].total_count_ { + left = i + i++ + } else { + left = j + j++ + } + + if tree[i].total_count_ <= tree[j].total_count_ { + right = i + i++ + } else { + right = j + j++ + } + { + /* The sentinel node becomes the parent node. */ + var j_end uint = 2*n - k + tree[j_end].total_count_ = tree[left].total_count_ + tree[right].total_count_ + tree[j_end].index_left_ = int16(left) + tree[j_end].index_right_or_value_ = int16(right) + + /* Add back the last sentinel node. */ + tree[j_end+1] = sentinel + } + } + + if setDepth(int(2*n-1), tree[0:], depth, tree_limit) { + /* We need to pack the Huffman tree in tree_limit bits. If this was not + successful, add fake entities to the lowest values and retry. */ + break + } + } +} + +func reverse(v []byte, start uint, end uint) { + end-- + for start < end { + var tmp byte = v[start] + v[start] = v[end] + v[end] = tmp + start++ + end-- + } +} + +func writeHuffmanTreeRepetitions(previous_value byte, value byte, repetitions uint, tree_size *uint, tree []byte, extra_bits_data []byte) { + assert(repetitions > 0) + if previous_value != value { + tree[*tree_size] = value + extra_bits_data[*tree_size] = 0 + (*tree_size)++ + repetitions-- + } + + if repetitions == 7 { + tree[*tree_size] = value + extra_bits_data[*tree_size] = 0 + (*tree_size)++ + repetitions-- + } + + if repetitions < 3 { + var i uint + for i = 0; i < repetitions; i++ { + tree[*tree_size] = value + extra_bits_data[*tree_size] = 0 + (*tree_size)++ + } + } else { + var start uint = *tree_size + repetitions -= 3 + for { + tree[*tree_size] = repeatPreviousCodeLength + extra_bits_data[*tree_size] = byte(repetitions & 0x3) + (*tree_size)++ + repetitions >>= 2 + if repetitions == 0 { + break + } + + repetitions-- + } + + reverse(tree, start, *tree_size) + reverse(extra_bits_data, start, *tree_size) + } +} + +func writeHuffmanTreeRepetitionsZeros(repetitions uint, tree_size *uint, tree []byte, extra_bits_data []byte) { + if repetitions == 11 { + tree[*tree_size] = 0 + extra_bits_data[*tree_size] = 0 + (*tree_size)++ + repetitions-- + } + + if repetitions < 3 { + var i uint + for i = 0; i < repetitions; i++ { + tree[*tree_size] = 0 + extra_bits_data[*tree_size] = 0 + (*tree_size)++ + } + } else { + var start uint = *tree_size + repetitions -= 3 + for { + tree[*tree_size] = repeatZeroCodeLength + extra_bits_data[*tree_size] = byte(repetitions & 0x7) + (*tree_size)++ + repetitions >>= 3 + if repetitions == 0 { + break + } + + repetitions-- + } + + reverse(tree, start, *tree_size) + reverse(extra_bits_data, start, *tree_size) + } +} + +/* Change the population counts in a way that the consequent + Huffman tree compression, especially its RLE-part will be more + likely to compress this data more efficiently. + + length contains the size of the histogram. + counts contains the population counts. + good_for_rle is a buffer of at least length size */ +func optimizeHuffmanCountsForRLE(length uint, counts []uint32, good_for_rle []byte) { + var nonzero_count uint = 0 + var stride uint + var limit uint + var sum uint + var streak_limit uint = 1240 + var i uint + /* Let's make the Huffman code more compatible with RLE encoding. */ + for i = 0; i < length; i++ { + if counts[i] != 0 { + nonzero_count++ + } + } + + if nonzero_count < 16 { + return + } + + for length != 0 && counts[length-1] == 0 { + length-- + } + + if length == 0 { + return /* All zeros. */ + } + + /* Now counts[0..length - 1] does not have trailing zeros. */ + { + var nonzeros uint = 0 + var smallest_nonzero uint32 = 1 << 30 + for i = 0; i < length; i++ { + if counts[i] != 0 { + nonzeros++ + if smallest_nonzero > counts[i] { + smallest_nonzero = counts[i] + } + } + } + + if nonzeros < 5 { + /* Small histogram will model it well. */ + return + } + + if smallest_nonzero < 4 { + var zeros uint = length - nonzeros + if zeros < 6 { + for i = 1; i < length-1; i++ { + if counts[i-1] != 0 && counts[i] == 0 && counts[i+1] != 0 { + counts[i] = 1 + } + } + } + } + + if nonzeros < 28 { + return + } + } + + /* 2) Let's mark all population counts that already can be encoded + with an RLE code. */ + for i := 0; i < int(length); i++ { + good_for_rle[i] = 0 + } + { + var symbol uint32 = counts[0] + /* Let's not spoil any of the existing good RLE codes. + Mark any seq of 0's that is longer as 5 as a good_for_rle. + Mark any seq of non-0's that is longer as 7 as a good_for_rle. */ + + var step uint = 0 + for i = 0; i <= length; i++ { + if i == length || counts[i] != symbol { + if (symbol == 0 && step >= 5) || (symbol != 0 && step >= 7) { + var k uint + for k = 0; k < step; k++ { + good_for_rle[i-k-1] = 1 + } + } + + step = 1 + if i != length { + symbol = counts[i] + } + } else { + step++ + } + } + } + + /* 3) Let's replace those population counts that lead to more RLE codes. + Math here is in 24.8 fixed point representation. */ + stride = 0 + + limit = uint(256*(counts[0]+counts[1]+counts[2])/3 + 420) + sum = 0 + for i = 0; i <= length; i++ { + if i == length || good_for_rle[i] != 0 || (i != 0 && good_for_rle[i-1] != 0) || (256*counts[i]-uint32(limit)+uint32(streak_limit)) >= uint32(2*streak_limit) { + if stride >= 4 || (stride >= 3 && sum == 0) { + var k uint + var count uint = (sum + stride/2) / stride + /* The stride must end, collapse what we have, if we have enough (4). */ + if count == 0 { + count = 1 + } + + if sum == 0 { + /* Don't make an all zeros stride to be upgraded to ones. */ + count = 0 + } + + for k = 0; k < stride; k++ { + /* We don't want to change value at counts[i], + that is already belonging to the next stride. Thus - 1. */ + counts[i-k-1] = uint32(count) + } + } + + stride = 0 + sum = 0 + if i < length-2 { + /* All interesting strides have a count of at least 4, */ + /* at least when non-zeros. */ + limit = uint(256*(counts[i]+counts[i+1]+counts[i+2])/3 + 420) + } else if i < length { + limit = uint(256 * counts[i]) + } else { + limit = 0 + } + } + + stride++ + if i != length { + sum += uint(counts[i]) + if stride >= 4 { + limit = (256*sum + stride/2) / stride + } + + if stride == 4 { + limit += 120 + } + } + } +} + +func decideOverRLEUse(depth []byte, length uint, use_rle_for_non_zero *bool, use_rle_for_zero *bool) { + var total_reps_zero uint = 0 + var total_reps_non_zero uint = 0 + var count_reps_zero uint = 1 + var count_reps_non_zero uint = 1 + var i uint + for i = 0; i < length; { + var value byte = depth[i] + var reps uint = 1 + var k uint + for k = i + 1; k < length && depth[k] == value; k++ { + reps++ + } + + if reps >= 3 && value == 0 { + total_reps_zero += reps + count_reps_zero++ + } + + if reps >= 4 && value != 0 { + total_reps_non_zero += reps + count_reps_non_zero++ + } + + i += reps + } + + *use_rle_for_non_zero = total_reps_non_zero > count_reps_non_zero*2 + *use_rle_for_zero = total_reps_zero > count_reps_zero*2 +} + +/* Write a Huffman tree from bit depths into the bit-stream representation + of a Huffman tree. The generated Huffman tree is to be compressed once + more using a Huffman tree */ +func writeHuffmanTree(depth []byte, length uint, tree_size *uint, tree []byte, extra_bits_data []byte) { + var previous_value byte = initialRepeatedCodeLength + var i uint + var use_rle_for_non_zero bool = false + var use_rle_for_zero bool = false + var new_length uint = length + /* Throw away trailing zeros. */ + for i = 0; i < length; i++ { + if depth[length-i-1] == 0 { + new_length-- + } else { + break + } + } + + /* First gather statistics on if it is a good idea to do RLE. */ + if length > 50 { + /* Find RLE coding for longer codes. + Shorter codes seem not to benefit from RLE. */ + decideOverRLEUse(depth, new_length, &use_rle_for_non_zero, &use_rle_for_zero) + } + + /* Actual RLE coding. */ + for i = 0; i < new_length; { + var value byte = depth[i] + var reps uint = 1 + if (value != 0 && use_rle_for_non_zero) || (value == 0 && use_rle_for_zero) { + var k uint + for k = i + 1; k < new_length && depth[k] == value; k++ { + reps++ + } + } + + if value == 0 { + writeHuffmanTreeRepetitionsZeros(reps, tree_size, tree, extra_bits_data) + } else { + writeHuffmanTreeRepetitions(previous_value, value, reps, tree_size, tree, extra_bits_data) + previous_value = value + } + + i += reps + } +} + +var reverseBits_kLut = [16]uint{ + 0x00, + 0x08, + 0x04, + 0x0C, + 0x02, + 0x0A, + 0x06, + 0x0E, + 0x01, + 0x09, + 0x05, + 0x0D, + 0x03, + 0x0B, + 0x07, + 0x0F, +} + +func reverseBits(num_bits uint, bits uint16) uint16 { + var retval uint = reverseBits_kLut[bits&0x0F] + var i uint + for i = 4; i < num_bits; i += 4 { + retval <<= 4 + bits = uint16(bits >> 4) + retval |= reverseBits_kLut[bits&0x0F] + } + + retval >>= ((0 - num_bits) & 0x03) + return uint16(retval) +} + +/* 0..15 are values for bits */ +const maxHuffmanBits = 16 + +/* Get the actual bit values for a tree of bit depths. */ +func convertBitDepthsToSymbols(depth []byte, len uint, bits []uint16) { + var bl_count = [maxHuffmanBits]uint16{0} + var next_code [maxHuffmanBits]uint16 + var i uint + /* In Brotli, all bit depths are [1..15] + 0 bit depth means that the symbol does not exist. */ + + var code int = 0 + for i = 0; i < len; i++ { + bl_count[depth[i]]++ + } + + bl_count[0] = 0 + next_code[0] = 0 + for i = 1; i < maxHuffmanBits; i++ { + code = (code + int(bl_count[i-1])) << 1 + next_code[i] = uint16(code) + } + + for i = 0; i < len; i++ { + if depth[i] != 0 { + bits[i] = reverseBits(uint(depth[i]), next_code[depth[i]]) + next_code[depth[i]]++ + } + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/entropy_encode_static.go b/backend/vendor/github.com/andybalholm/brotli/entropy_encode_static.go new file mode 100644 index 0000000..294aff4 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/entropy_encode_static.go @@ -0,0 +1,4399 @@ +package brotli + +var kCodeLengthDepth = [18]byte{4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 0, 4, 4} + +var kStaticCommandCodeDepth = [numCommandSymbols]byte{ + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 9, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, + 11, +} + +var kStaticDistanceCodeDepth = [64]byte{ + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, + 6, +} + +var kCodeLengthBits = [18]uint32{0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 15, 31, 0, 11, 7} + +func storeStaticCodeLengthCode(storage_ix *uint, storage []byte) { + writeBits(40, 0x0000FF55555554, storage_ix, storage) +} + +func storeStaticCodeLengthCodeBW(bw *bitWriter) { + bw.writeBits(32, 0x55555554) + bw.writeBits(8, 0xFF) +} + +var kZeroRepsBits = [numCommandSymbols]uint64{ + 0x00000000, + 0x00000000, + 0x00000000, + 0x00000007, + 0x00000017, + 0x00000027, + 0x00000037, + 0x00000047, + 0x00000057, + 0x00000067, + 0x00000077, + 0x00000770, + 0x00000b87, + 0x00001387, + 0x00001b87, + 0x00002387, + 0x00002b87, + 0x00003387, + 0x00003b87, + 0x00000397, + 0x00000b97, + 0x00001397, + 0x00001b97, + 0x00002397, + 0x00002b97, + 0x00003397, + 0x00003b97, + 0x000003a7, + 0x00000ba7, + 0x000013a7, + 0x00001ba7, + 0x000023a7, + 0x00002ba7, + 0x000033a7, + 0x00003ba7, + 0x000003b7, + 0x00000bb7, + 0x000013b7, + 0x00001bb7, + 0x000023b7, + 0x00002bb7, + 0x000033b7, + 0x00003bb7, + 0x000003c7, + 0x00000bc7, + 0x000013c7, + 0x00001bc7, + 0x000023c7, + 0x00002bc7, + 0x000033c7, + 0x00003bc7, + 0x000003d7, + 0x00000bd7, + 0x000013d7, + 0x00001bd7, + 0x000023d7, + 0x00002bd7, + 0x000033d7, + 0x00003bd7, + 0x000003e7, + 0x00000be7, + 0x000013e7, + 0x00001be7, + 0x000023e7, + 0x00002be7, + 0x000033e7, + 0x00003be7, + 0x000003f7, + 0x00000bf7, + 0x000013f7, + 0x00001bf7, + 0x000023f7, + 0x00002bf7, + 0x000033f7, + 0x00003bf7, + 0x0001c387, + 0x0005c387, + 0x0009c387, + 0x000dc387, + 0x0011c387, + 0x0015c387, + 0x0019c387, + 0x001dc387, + 0x0001cb87, + 0x0005cb87, + 0x0009cb87, + 0x000dcb87, + 0x0011cb87, + 0x0015cb87, + 0x0019cb87, + 0x001dcb87, + 0x0001d387, + 0x0005d387, + 0x0009d387, + 0x000dd387, + 0x0011d387, + 0x0015d387, + 0x0019d387, + 0x001dd387, + 0x0001db87, + 0x0005db87, + 0x0009db87, + 0x000ddb87, + 0x0011db87, + 0x0015db87, + 0x0019db87, + 0x001ddb87, + 0x0001e387, + 0x0005e387, + 0x0009e387, + 0x000de387, + 0x0011e387, + 0x0015e387, + 0x0019e387, + 0x001de387, + 0x0001eb87, + 0x0005eb87, + 0x0009eb87, + 0x000deb87, + 0x0011eb87, + 0x0015eb87, + 0x0019eb87, + 0x001deb87, + 0x0001f387, + 0x0005f387, + 0x0009f387, + 0x000df387, + 0x0011f387, + 0x0015f387, + 0x0019f387, + 0x001df387, + 0x0001fb87, + 0x0005fb87, + 0x0009fb87, + 0x000dfb87, + 0x0011fb87, + 0x0015fb87, + 0x0019fb87, + 0x001dfb87, + 0x0001c397, + 0x0005c397, + 0x0009c397, + 0x000dc397, + 0x0011c397, + 0x0015c397, + 0x0019c397, + 0x001dc397, + 0x0001cb97, + 0x0005cb97, + 0x0009cb97, + 0x000dcb97, + 0x0011cb97, + 0x0015cb97, + 0x0019cb97, + 0x001dcb97, + 0x0001d397, + 0x0005d397, + 0x0009d397, + 0x000dd397, + 0x0011d397, + 0x0015d397, + 0x0019d397, + 0x001dd397, + 0x0001db97, + 0x0005db97, + 0x0009db97, + 0x000ddb97, + 0x0011db97, + 0x0015db97, + 0x0019db97, + 0x001ddb97, + 0x0001e397, + 0x0005e397, + 0x0009e397, + 0x000de397, + 0x0011e397, + 0x0015e397, + 0x0019e397, + 0x001de397, + 0x0001eb97, + 0x0005eb97, + 0x0009eb97, + 0x000deb97, + 0x0011eb97, + 0x0015eb97, + 0x0019eb97, + 0x001deb97, + 0x0001f397, + 0x0005f397, + 0x0009f397, + 0x000df397, + 0x0011f397, + 0x0015f397, + 0x0019f397, + 0x001df397, + 0x0001fb97, + 0x0005fb97, + 0x0009fb97, + 0x000dfb97, + 0x0011fb97, + 0x0015fb97, + 0x0019fb97, + 0x001dfb97, + 0x0001c3a7, + 0x0005c3a7, + 0x0009c3a7, + 0x000dc3a7, + 0x0011c3a7, + 0x0015c3a7, + 0x0019c3a7, + 0x001dc3a7, + 0x0001cba7, + 0x0005cba7, + 0x0009cba7, + 0x000dcba7, + 0x0011cba7, + 0x0015cba7, + 0x0019cba7, + 0x001dcba7, + 0x0001d3a7, + 0x0005d3a7, + 0x0009d3a7, + 0x000dd3a7, + 0x0011d3a7, + 0x0015d3a7, + 0x0019d3a7, + 0x001dd3a7, + 0x0001dba7, + 0x0005dba7, + 0x0009dba7, + 0x000ddba7, + 0x0011dba7, + 0x0015dba7, + 0x0019dba7, + 0x001ddba7, + 0x0001e3a7, + 0x0005e3a7, + 0x0009e3a7, + 0x000de3a7, + 0x0011e3a7, + 0x0015e3a7, + 0x0019e3a7, + 0x001de3a7, + 0x0001eba7, + 0x0005eba7, + 0x0009eba7, + 0x000deba7, + 0x0011eba7, + 0x0015eba7, + 0x0019eba7, + 0x001deba7, + 0x0001f3a7, + 0x0005f3a7, + 0x0009f3a7, + 0x000df3a7, + 0x0011f3a7, + 0x0015f3a7, + 0x0019f3a7, + 0x001df3a7, + 0x0001fba7, + 0x0005fba7, + 0x0009fba7, + 0x000dfba7, + 0x0011fba7, + 0x0015fba7, + 0x0019fba7, + 0x001dfba7, + 0x0001c3b7, + 0x0005c3b7, + 0x0009c3b7, + 0x000dc3b7, + 0x0011c3b7, + 0x0015c3b7, + 0x0019c3b7, + 0x001dc3b7, + 0x0001cbb7, + 0x0005cbb7, + 0x0009cbb7, + 0x000dcbb7, + 0x0011cbb7, + 0x0015cbb7, + 0x0019cbb7, + 0x001dcbb7, + 0x0001d3b7, + 0x0005d3b7, + 0x0009d3b7, + 0x000dd3b7, + 0x0011d3b7, + 0x0015d3b7, + 0x0019d3b7, + 0x001dd3b7, + 0x0001dbb7, + 0x0005dbb7, + 0x0009dbb7, + 0x000ddbb7, + 0x0011dbb7, + 0x0015dbb7, + 0x0019dbb7, + 0x001ddbb7, + 0x0001e3b7, + 0x0005e3b7, + 0x0009e3b7, + 0x000de3b7, + 0x0011e3b7, + 0x0015e3b7, + 0x0019e3b7, + 0x001de3b7, + 0x0001ebb7, + 0x0005ebb7, + 0x0009ebb7, + 0x000debb7, + 0x0011ebb7, + 0x0015ebb7, + 0x0019ebb7, + 0x001debb7, + 0x0001f3b7, + 0x0005f3b7, + 0x0009f3b7, + 0x000df3b7, + 0x0011f3b7, + 0x0015f3b7, + 0x0019f3b7, + 0x001df3b7, + 0x0001fbb7, + 0x0005fbb7, + 0x0009fbb7, + 0x000dfbb7, + 0x0011fbb7, + 0x0015fbb7, + 0x0019fbb7, + 0x001dfbb7, + 0x0001c3c7, + 0x0005c3c7, + 0x0009c3c7, + 0x000dc3c7, + 0x0011c3c7, + 0x0015c3c7, + 0x0019c3c7, + 0x001dc3c7, + 0x0001cbc7, + 0x0005cbc7, + 0x0009cbc7, + 0x000dcbc7, + 0x0011cbc7, + 0x0015cbc7, + 0x0019cbc7, + 0x001dcbc7, + 0x0001d3c7, + 0x0005d3c7, + 0x0009d3c7, + 0x000dd3c7, + 0x0011d3c7, + 0x0015d3c7, + 0x0019d3c7, + 0x001dd3c7, + 0x0001dbc7, + 0x0005dbc7, + 0x0009dbc7, + 0x000ddbc7, + 0x0011dbc7, + 0x0015dbc7, + 0x0019dbc7, + 0x001ddbc7, + 0x0001e3c7, + 0x0005e3c7, + 0x0009e3c7, + 0x000de3c7, + 0x0011e3c7, + 0x0015e3c7, + 0x0019e3c7, + 0x001de3c7, + 0x0001ebc7, + 0x0005ebc7, + 0x0009ebc7, + 0x000debc7, + 0x0011ebc7, + 0x0015ebc7, + 0x0019ebc7, + 0x001debc7, + 0x0001f3c7, + 0x0005f3c7, + 0x0009f3c7, + 0x000df3c7, + 0x0011f3c7, + 0x0015f3c7, + 0x0019f3c7, + 0x001df3c7, + 0x0001fbc7, + 0x0005fbc7, + 0x0009fbc7, + 0x000dfbc7, + 0x0011fbc7, + 0x0015fbc7, + 0x0019fbc7, + 0x001dfbc7, + 0x0001c3d7, + 0x0005c3d7, + 0x0009c3d7, + 0x000dc3d7, + 0x0011c3d7, + 0x0015c3d7, + 0x0019c3d7, + 0x001dc3d7, + 0x0001cbd7, + 0x0005cbd7, + 0x0009cbd7, + 0x000dcbd7, + 0x0011cbd7, + 0x0015cbd7, + 0x0019cbd7, + 0x001dcbd7, + 0x0001d3d7, + 0x0005d3d7, + 0x0009d3d7, + 0x000dd3d7, + 0x0011d3d7, + 0x0015d3d7, + 0x0019d3d7, + 0x001dd3d7, + 0x0001dbd7, + 0x0005dbd7, + 0x0009dbd7, + 0x000ddbd7, + 0x0011dbd7, + 0x0015dbd7, + 0x0019dbd7, + 0x001ddbd7, + 0x0001e3d7, + 0x0005e3d7, + 0x0009e3d7, + 0x000de3d7, + 0x0011e3d7, + 0x0015e3d7, + 0x0019e3d7, + 0x001de3d7, + 0x0001ebd7, + 0x0005ebd7, + 0x0009ebd7, + 0x000debd7, + 0x0011ebd7, + 0x0015ebd7, + 0x0019ebd7, + 0x001debd7, + 0x0001f3d7, + 0x0005f3d7, + 0x0009f3d7, + 0x000df3d7, + 0x0011f3d7, + 0x0015f3d7, + 0x0019f3d7, + 0x001df3d7, + 0x0001fbd7, + 0x0005fbd7, + 0x0009fbd7, + 0x000dfbd7, + 0x0011fbd7, + 0x0015fbd7, + 0x0019fbd7, + 0x001dfbd7, + 0x0001c3e7, + 0x0005c3e7, + 0x0009c3e7, + 0x000dc3e7, + 0x0011c3e7, + 0x0015c3e7, + 0x0019c3e7, + 0x001dc3e7, + 0x0001cbe7, + 0x0005cbe7, + 0x0009cbe7, + 0x000dcbe7, + 0x0011cbe7, + 0x0015cbe7, + 0x0019cbe7, + 0x001dcbe7, + 0x0001d3e7, + 0x0005d3e7, + 0x0009d3e7, + 0x000dd3e7, + 0x0011d3e7, + 0x0015d3e7, + 0x0019d3e7, + 0x001dd3e7, + 0x0001dbe7, + 0x0005dbe7, + 0x0009dbe7, + 0x000ddbe7, + 0x0011dbe7, + 0x0015dbe7, + 0x0019dbe7, + 0x001ddbe7, + 0x0001e3e7, + 0x0005e3e7, + 0x0009e3e7, + 0x000de3e7, + 0x0011e3e7, + 0x0015e3e7, + 0x0019e3e7, + 0x001de3e7, + 0x0001ebe7, + 0x0005ebe7, + 0x0009ebe7, + 0x000debe7, + 0x0011ebe7, + 0x0015ebe7, + 0x0019ebe7, + 0x001debe7, + 0x0001f3e7, + 0x0005f3e7, + 0x0009f3e7, + 0x000df3e7, + 0x0011f3e7, + 0x0015f3e7, + 0x0019f3e7, + 0x001df3e7, + 0x0001fbe7, + 0x0005fbe7, + 0x0009fbe7, + 0x000dfbe7, + 0x0011fbe7, + 0x0015fbe7, + 0x0019fbe7, + 0x001dfbe7, + 0x0001c3f7, + 0x0005c3f7, + 0x0009c3f7, + 0x000dc3f7, + 0x0011c3f7, + 0x0015c3f7, + 0x0019c3f7, + 0x001dc3f7, + 0x0001cbf7, + 0x0005cbf7, + 0x0009cbf7, + 0x000dcbf7, + 0x0011cbf7, + 0x0015cbf7, + 0x0019cbf7, + 0x001dcbf7, + 0x0001d3f7, + 0x0005d3f7, + 0x0009d3f7, + 0x000dd3f7, + 0x0011d3f7, + 0x0015d3f7, + 0x0019d3f7, + 0x001dd3f7, + 0x0001dbf7, + 0x0005dbf7, + 0x0009dbf7, + 0x000ddbf7, + 0x0011dbf7, + 0x0015dbf7, + 0x0019dbf7, + 0x001ddbf7, + 0x0001e3f7, + 0x0005e3f7, + 0x0009e3f7, + 0x000de3f7, + 0x0011e3f7, + 0x0015e3f7, + 0x0019e3f7, + 0x001de3f7, + 0x0001ebf7, + 0x0005ebf7, + 0x0009ebf7, + 0x000debf7, + 0x0011ebf7, + 0x0015ebf7, + 0x0019ebf7, + 0x001debf7, + 0x0001f3f7, + 0x0005f3f7, + 0x0009f3f7, + 0x000df3f7, + 0x0011f3f7, + 0x0015f3f7, + 0x0019f3f7, + 0x001df3f7, + 0x0001fbf7, + 0x0005fbf7, + 0x0009fbf7, + 0x000dfbf7, + 0x0011fbf7, + 0x0015fbf7, + 0x0019fbf7, + 0x001dfbf7, + 0x00e1c387, + 0x02e1c387, + 0x04e1c387, + 0x06e1c387, + 0x08e1c387, + 0x0ae1c387, + 0x0ce1c387, + 0x0ee1c387, + 0x00e5c387, + 0x02e5c387, + 0x04e5c387, + 0x06e5c387, + 0x08e5c387, + 0x0ae5c387, + 0x0ce5c387, + 0x0ee5c387, + 0x00e9c387, + 0x02e9c387, + 0x04e9c387, + 0x06e9c387, + 0x08e9c387, + 0x0ae9c387, + 0x0ce9c387, + 0x0ee9c387, + 0x00edc387, + 0x02edc387, + 0x04edc387, + 0x06edc387, + 0x08edc387, + 0x0aedc387, + 0x0cedc387, + 0x0eedc387, + 0x00f1c387, + 0x02f1c387, + 0x04f1c387, + 0x06f1c387, + 0x08f1c387, + 0x0af1c387, + 0x0cf1c387, + 0x0ef1c387, + 0x00f5c387, + 0x02f5c387, + 0x04f5c387, + 0x06f5c387, + 0x08f5c387, + 0x0af5c387, + 0x0cf5c387, + 0x0ef5c387, + 0x00f9c387, + 0x02f9c387, + 0x04f9c387, + 0x06f9c387, + 0x08f9c387, + 0x0af9c387, + 0x0cf9c387, + 0x0ef9c387, + 0x00fdc387, + 0x02fdc387, + 0x04fdc387, + 0x06fdc387, + 0x08fdc387, + 0x0afdc387, + 0x0cfdc387, + 0x0efdc387, + 0x00e1cb87, + 0x02e1cb87, + 0x04e1cb87, + 0x06e1cb87, + 0x08e1cb87, + 0x0ae1cb87, + 0x0ce1cb87, + 0x0ee1cb87, + 0x00e5cb87, + 0x02e5cb87, + 0x04e5cb87, + 0x06e5cb87, + 0x08e5cb87, + 0x0ae5cb87, + 0x0ce5cb87, + 0x0ee5cb87, + 0x00e9cb87, + 0x02e9cb87, + 0x04e9cb87, + 0x06e9cb87, + 0x08e9cb87, + 0x0ae9cb87, + 0x0ce9cb87, + 0x0ee9cb87, + 0x00edcb87, + 0x02edcb87, + 0x04edcb87, + 0x06edcb87, + 0x08edcb87, + 0x0aedcb87, + 0x0cedcb87, + 0x0eedcb87, + 0x00f1cb87, + 0x02f1cb87, + 0x04f1cb87, + 0x06f1cb87, + 0x08f1cb87, + 0x0af1cb87, + 0x0cf1cb87, + 0x0ef1cb87, + 0x00f5cb87, + 0x02f5cb87, + 0x04f5cb87, + 0x06f5cb87, + 0x08f5cb87, + 0x0af5cb87, + 0x0cf5cb87, + 0x0ef5cb87, + 0x00f9cb87, + 0x02f9cb87, + 0x04f9cb87, + 0x06f9cb87, + 0x08f9cb87, +} + +var kZeroRepsDepth = [numCommandSymbols]uint32{ + 0, + 4, + 8, + 7, + 7, + 7, + 7, + 7, + 7, + 7, + 7, + 11, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 14, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 21, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, + 28, +} + +var kNonZeroRepsBits = [numCommandSymbols]uint64{ + 0x0000000b, + 0x0000001b, + 0x0000002b, + 0x0000003b, + 0x000002cb, + 0x000006cb, + 0x00000acb, + 0x00000ecb, + 0x000002db, + 0x000006db, + 0x00000adb, + 0x00000edb, + 0x000002eb, + 0x000006eb, + 0x00000aeb, + 0x00000eeb, + 0x000002fb, + 0x000006fb, + 0x00000afb, + 0x00000efb, + 0x0000b2cb, + 0x0001b2cb, + 0x0002b2cb, + 0x0003b2cb, + 0x0000b6cb, + 0x0001b6cb, + 0x0002b6cb, + 0x0003b6cb, + 0x0000bacb, + 0x0001bacb, + 0x0002bacb, + 0x0003bacb, + 0x0000becb, + 0x0001becb, + 0x0002becb, + 0x0003becb, + 0x0000b2db, + 0x0001b2db, + 0x0002b2db, + 0x0003b2db, + 0x0000b6db, + 0x0001b6db, + 0x0002b6db, + 0x0003b6db, + 0x0000badb, + 0x0001badb, + 0x0002badb, + 0x0003badb, + 0x0000bedb, + 0x0001bedb, + 0x0002bedb, + 0x0003bedb, + 0x0000b2eb, + 0x0001b2eb, + 0x0002b2eb, + 0x0003b2eb, + 0x0000b6eb, + 0x0001b6eb, + 0x0002b6eb, + 0x0003b6eb, + 0x0000baeb, + 0x0001baeb, + 0x0002baeb, + 0x0003baeb, + 0x0000beeb, + 0x0001beeb, + 0x0002beeb, + 0x0003beeb, + 0x0000b2fb, + 0x0001b2fb, + 0x0002b2fb, + 0x0003b2fb, + 0x0000b6fb, + 0x0001b6fb, + 0x0002b6fb, + 0x0003b6fb, + 0x0000bafb, + 0x0001bafb, + 0x0002bafb, + 0x0003bafb, + 0x0000befb, + 0x0001befb, + 0x0002befb, + 0x0003befb, + 0x002cb2cb, + 0x006cb2cb, + 0x00acb2cb, + 0x00ecb2cb, + 0x002db2cb, + 0x006db2cb, + 0x00adb2cb, + 0x00edb2cb, + 0x002eb2cb, + 0x006eb2cb, + 0x00aeb2cb, + 0x00eeb2cb, + 0x002fb2cb, + 0x006fb2cb, + 0x00afb2cb, + 0x00efb2cb, + 0x002cb6cb, + 0x006cb6cb, + 0x00acb6cb, + 0x00ecb6cb, + 0x002db6cb, + 0x006db6cb, + 0x00adb6cb, + 0x00edb6cb, + 0x002eb6cb, + 0x006eb6cb, + 0x00aeb6cb, + 0x00eeb6cb, + 0x002fb6cb, + 0x006fb6cb, + 0x00afb6cb, + 0x00efb6cb, + 0x002cbacb, + 0x006cbacb, + 0x00acbacb, + 0x00ecbacb, + 0x002dbacb, + 0x006dbacb, + 0x00adbacb, + 0x00edbacb, + 0x002ebacb, + 0x006ebacb, + 0x00aebacb, + 0x00eebacb, + 0x002fbacb, + 0x006fbacb, + 0x00afbacb, + 0x00efbacb, + 0x002cbecb, + 0x006cbecb, + 0x00acbecb, + 0x00ecbecb, + 0x002dbecb, + 0x006dbecb, + 0x00adbecb, + 0x00edbecb, + 0x002ebecb, + 0x006ebecb, + 0x00aebecb, + 0x00eebecb, + 0x002fbecb, + 0x006fbecb, + 0x00afbecb, + 0x00efbecb, + 0x002cb2db, + 0x006cb2db, + 0x00acb2db, + 0x00ecb2db, + 0x002db2db, + 0x006db2db, + 0x00adb2db, + 0x00edb2db, + 0x002eb2db, + 0x006eb2db, + 0x00aeb2db, + 0x00eeb2db, + 0x002fb2db, + 0x006fb2db, + 0x00afb2db, + 0x00efb2db, + 0x002cb6db, + 0x006cb6db, + 0x00acb6db, + 0x00ecb6db, + 0x002db6db, + 0x006db6db, + 0x00adb6db, + 0x00edb6db, + 0x002eb6db, + 0x006eb6db, + 0x00aeb6db, + 0x00eeb6db, + 0x002fb6db, + 0x006fb6db, + 0x00afb6db, + 0x00efb6db, + 0x002cbadb, + 0x006cbadb, + 0x00acbadb, + 0x00ecbadb, + 0x002dbadb, + 0x006dbadb, + 0x00adbadb, + 0x00edbadb, + 0x002ebadb, + 0x006ebadb, + 0x00aebadb, + 0x00eebadb, + 0x002fbadb, + 0x006fbadb, + 0x00afbadb, + 0x00efbadb, + 0x002cbedb, + 0x006cbedb, + 0x00acbedb, + 0x00ecbedb, + 0x002dbedb, + 0x006dbedb, + 0x00adbedb, + 0x00edbedb, + 0x002ebedb, + 0x006ebedb, + 0x00aebedb, + 0x00eebedb, + 0x002fbedb, + 0x006fbedb, + 0x00afbedb, + 0x00efbedb, + 0x002cb2eb, + 0x006cb2eb, + 0x00acb2eb, + 0x00ecb2eb, + 0x002db2eb, + 0x006db2eb, + 0x00adb2eb, + 0x00edb2eb, + 0x002eb2eb, + 0x006eb2eb, + 0x00aeb2eb, + 0x00eeb2eb, + 0x002fb2eb, + 0x006fb2eb, + 0x00afb2eb, + 0x00efb2eb, + 0x002cb6eb, + 0x006cb6eb, + 0x00acb6eb, + 0x00ecb6eb, + 0x002db6eb, + 0x006db6eb, + 0x00adb6eb, + 0x00edb6eb, + 0x002eb6eb, + 0x006eb6eb, + 0x00aeb6eb, + 0x00eeb6eb, + 0x002fb6eb, + 0x006fb6eb, + 0x00afb6eb, + 0x00efb6eb, + 0x002cbaeb, + 0x006cbaeb, + 0x00acbaeb, + 0x00ecbaeb, + 0x002dbaeb, + 0x006dbaeb, + 0x00adbaeb, + 0x00edbaeb, + 0x002ebaeb, + 0x006ebaeb, + 0x00aebaeb, + 0x00eebaeb, + 0x002fbaeb, + 0x006fbaeb, + 0x00afbaeb, + 0x00efbaeb, + 0x002cbeeb, + 0x006cbeeb, + 0x00acbeeb, + 0x00ecbeeb, + 0x002dbeeb, + 0x006dbeeb, + 0x00adbeeb, + 0x00edbeeb, + 0x002ebeeb, + 0x006ebeeb, + 0x00aebeeb, + 0x00eebeeb, + 0x002fbeeb, + 0x006fbeeb, + 0x00afbeeb, + 0x00efbeeb, + 0x002cb2fb, + 0x006cb2fb, + 0x00acb2fb, + 0x00ecb2fb, + 0x002db2fb, + 0x006db2fb, + 0x00adb2fb, + 0x00edb2fb, + 0x002eb2fb, + 0x006eb2fb, + 0x00aeb2fb, + 0x00eeb2fb, + 0x002fb2fb, + 0x006fb2fb, + 0x00afb2fb, + 0x00efb2fb, + 0x002cb6fb, + 0x006cb6fb, + 0x00acb6fb, + 0x00ecb6fb, + 0x002db6fb, + 0x006db6fb, + 0x00adb6fb, + 0x00edb6fb, + 0x002eb6fb, + 0x006eb6fb, + 0x00aeb6fb, + 0x00eeb6fb, + 0x002fb6fb, + 0x006fb6fb, + 0x00afb6fb, + 0x00efb6fb, + 0x002cbafb, + 0x006cbafb, + 0x00acbafb, + 0x00ecbafb, + 0x002dbafb, + 0x006dbafb, + 0x00adbafb, + 0x00edbafb, + 0x002ebafb, + 0x006ebafb, + 0x00aebafb, + 0x00eebafb, + 0x002fbafb, + 0x006fbafb, + 0x00afbafb, + 0x00efbafb, + 0x002cbefb, + 0x006cbefb, + 0x00acbefb, + 0x00ecbefb, + 0x002dbefb, + 0x006dbefb, + 0x00adbefb, + 0x00edbefb, + 0x002ebefb, + 0x006ebefb, + 0x00aebefb, + 0x00eebefb, + 0x002fbefb, + 0x006fbefb, + 0x00afbefb, + 0x00efbefb, + 0x0b2cb2cb, + 0x1b2cb2cb, + 0x2b2cb2cb, + 0x3b2cb2cb, + 0x0b6cb2cb, + 0x1b6cb2cb, + 0x2b6cb2cb, + 0x3b6cb2cb, + 0x0bacb2cb, + 0x1bacb2cb, + 0x2bacb2cb, + 0x3bacb2cb, + 0x0becb2cb, + 0x1becb2cb, + 0x2becb2cb, + 0x3becb2cb, + 0x0b2db2cb, + 0x1b2db2cb, + 0x2b2db2cb, + 0x3b2db2cb, + 0x0b6db2cb, + 0x1b6db2cb, + 0x2b6db2cb, + 0x3b6db2cb, + 0x0badb2cb, + 0x1badb2cb, + 0x2badb2cb, + 0x3badb2cb, + 0x0bedb2cb, + 0x1bedb2cb, + 0x2bedb2cb, + 0x3bedb2cb, + 0x0b2eb2cb, + 0x1b2eb2cb, + 0x2b2eb2cb, + 0x3b2eb2cb, + 0x0b6eb2cb, + 0x1b6eb2cb, + 0x2b6eb2cb, + 0x3b6eb2cb, + 0x0baeb2cb, + 0x1baeb2cb, + 0x2baeb2cb, + 0x3baeb2cb, + 0x0beeb2cb, + 0x1beeb2cb, + 0x2beeb2cb, + 0x3beeb2cb, + 0x0b2fb2cb, + 0x1b2fb2cb, + 0x2b2fb2cb, + 0x3b2fb2cb, + 0x0b6fb2cb, + 0x1b6fb2cb, + 0x2b6fb2cb, + 0x3b6fb2cb, + 0x0bafb2cb, + 0x1bafb2cb, + 0x2bafb2cb, + 0x3bafb2cb, + 0x0befb2cb, + 0x1befb2cb, + 0x2befb2cb, + 0x3befb2cb, + 0x0b2cb6cb, + 0x1b2cb6cb, + 0x2b2cb6cb, + 0x3b2cb6cb, + 0x0b6cb6cb, + 0x1b6cb6cb, + 0x2b6cb6cb, + 0x3b6cb6cb, + 0x0bacb6cb, + 0x1bacb6cb, + 0x2bacb6cb, + 0x3bacb6cb, + 0x0becb6cb, + 0x1becb6cb, + 0x2becb6cb, + 0x3becb6cb, + 0x0b2db6cb, + 0x1b2db6cb, + 0x2b2db6cb, + 0x3b2db6cb, + 0x0b6db6cb, + 0x1b6db6cb, + 0x2b6db6cb, + 0x3b6db6cb, + 0x0badb6cb, + 0x1badb6cb, + 0x2badb6cb, + 0x3badb6cb, + 0x0bedb6cb, + 0x1bedb6cb, + 0x2bedb6cb, + 0x3bedb6cb, + 0x0b2eb6cb, + 0x1b2eb6cb, + 0x2b2eb6cb, + 0x3b2eb6cb, + 0x0b6eb6cb, + 0x1b6eb6cb, + 0x2b6eb6cb, + 0x3b6eb6cb, + 0x0baeb6cb, + 0x1baeb6cb, + 0x2baeb6cb, + 0x3baeb6cb, + 0x0beeb6cb, + 0x1beeb6cb, + 0x2beeb6cb, + 0x3beeb6cb, + 0x0b2fb6cb, + 0x1b2fb6cb, + 0x2b2fb6cb, + 0x3b2fb6cb, + 0x0b6fb6cb, + 0x1b6fb6cb, + 0x2b6fb6cb, + 0x3b6fb6cb, + 0x0bafb6cb, + 0x1bafb6cb, + 0x2bafb6cb, + 0x3bafb6cb, + 0x0befb6cb, + 0x1befb6cb, + 0x2befb6cb, + 0x3befb6cb, + 0x0b2cbacb, + 0x1b2cbacb, + 0x2b2cbacb, + 0x3b2cbacb, + 0x0b6cbacb, + 0x1b6cbacb, + 0x2b6cbacb, + 0x3b6cbacb, + 0x0bacbacb, + 0x1bacbacb, + 0x2bacbacb, + 0x3bacbacb, + 0x0becbacb, + 0x1becbacb, + 0x2becbacb, + 0x3becbacb, + 0x0b2dbacb, + 0x1b2dbacb, + 0x2b2dbacb, + 0x3b2dbacb, + 0x0b6dbacb, + 0x1b6dbacb, + 0x2b6dbacb, + 0x3b6dbacb, + 0x0badbacb, + 0x1badbacb, + 0x2badbacb, + 0x3badbacb, + 0x0bedbacb, + 0x1bedbacb, + 0x2bedbacb, + 0x3bedbacb, + 0x0b2ebacb, + 0x1b2ebacb, + 0x2b2ebacb, + 0x3b2ebacb, + 0x0b6ebacb, + 0x1b6ebacb, + 0x2b6ebacb, + 0x3b6ebacb, + 0x0baebacb, + 0x1baebacb, + 0x2baebacb, + 0x3baebacb, + 0x0beebacb, + 0x1beebacb, + 0x2beebacb, + 0x3beebacb, + 0x0b2fbacb, + 0x1b2fbacb, + 0x2b2fbacb, + 0x3b2fbacb, + 0x0b6fbacb, + 0x1b6fbacb, + 0x2b6fbacb, + 0x3b6fbacb, + 0x0bafbacb, + 0x1bafbacb, + 0x2bafbacb, + 0x3bafbacb, + 0x0befbacb, + 0x1befbacb, + 0x2befbacb, + 0x3befbacb, + 0x0b2cbecb, + 0x1b2cbecb, + 0x2b2cbecb, + 0x3b2cbecb, + 0x0b6cbecb, + 0x1b6cbecb, + 0x2b6cbecb, + 0x3b6cbecb, + 0x0bacbecb, + 0x1bacbecb, + 0x2bacbecb, + 0x3bacbecb, + 0x0becbecb, + 0x1becbecb, + 0x2becbecb, + 0x3becbecb, + 0x0b2dbecb, + 0x1b2dbecb, + 0x2b2dbecb, + 0x3b2dbecb, + 0x0b6dbecb, + 0x1b6dbecb, + 0x2b6dbecb, + 0x3b6dbecb, + 0x0badbecb, + 0x1badbecb, + 0x2badbecb, + 0x3badbecb, + 0x0bedbecb, + 0x1bedbecb, + 0x2bedbecb, + 0x3bedbecb, + 0x0b2ebecb, + 0x1b2ebecb, + 0x2b2ebecb, + 0x3b2ebecb, + 0x0b6ebecb, + 0x1b6ebecb, + 0x2b6ebecb, + 0x3b6ebecb, + 0x0baebecb, + 0x1baebecb, + 0x2baebecb, + 0x3baebecb, + 0x0beebecb, + 0x1beebecb, + 0x2beebecb, + 0x3beebecb, + 0x0b2fbecb, + 0x1b2fbecb, + 0x2b2fbecb, + 0x3b2fbecb, + 0x0b6fbecb, + 0x1b6fbecb, + 0x2b6fbecb, + 0x3b6fbecb, + 0x0bafbecb, + 0x1bafbecb, + 0x2bafbecb, + 0x3bafbecb, + 0x0befbecb, + 0x1befbecb, + 0x2befbecb, + 0x3befbecb, + 0x0b2cb2db, + 0x1b2cb2db, + 0x2b2cb2db, + 0x3b2cb2db, + 0x0b6cb2db, + 0x1b6cb2db, + 0x2b6cb2db, + 0x3b6cb2db, + 0x0bacb2db, + 0x1bacb2db, + 0x2bacb2db, + 0x3bacb2db, + 0x0becb2db, + 0x1becb2db, + 0x2becb2db, + 0x3becb2db, + 0x0b2db2db, + 0x1b2db2db, + 0x2b2db2db, + 0x3b2db2db, + 0x0b6db2db, + 0x1b6db2db, + 0x2b6db2db, + 0x3b6db2db, + 0x0badb2db, + 0x1badb2db, + 0x2badb2db, + 0x3badb2db, + 0x0bedb2db, + 0x1bedb2db, + 0x2bedb2db, + 0x3bedb2db, + 0x0b2eb2db, + 0x1b2eb2db, + 0x2b2eb2db, + 0x3b2eb2db, + 0x0b6eb2db, + 0x1b6eb2db, + 0x2b6eb2db, + 0x3b6eb2db, + 0x0baeb2db, + 0x1baeb2db, + 0x2baeb2db, + 0x3baeb2db, + 0x0beeb2db, + 0x1beeb2db, + 0x2beeb2db, + 0x3beeb2db, + 0x0b2fb2db, + 0x1b2fb2db, + 0x2b2fb2db, + 0x3b2fb2db, + 0x0b6fb2db, + 0x1b6fb2db, + 0x2b6fb2db, + 0x3b6fb2db, + 0x0bafb2db, + 0x1bafb2db, + 0x2bafb2db, + 0x3bafb2db, + 0x0befb2db, + 0x1befb2db, + 0x2befb2db, + 0x3befb2db, + 0x0b2cb6db, + 0x1b2cb6db, + 0x2b2cb6db, + 0x3b2cb6db, + 0x0b6cb6db, + 0x1b6cb6db, + 0x2b6cb6db, + 0x3b6cb6db, + 0x0bacb6db, + 0x1bacb6db, + 0x2bacb6db, + 0x3bacb6db, + 0x0becb6db, + 0x1becb6db, + 0x2becb6db, + 0x3becb6db, + 0x0b2db6db, + 0x1b2db6db, + 0x2b2db6db, + 0x3b2db6db, + 0x0b6db6db, + 0x1b6db6db, + 0x2b6db6db, + 0x3b6db6db, + 0x0badb6db, + 0x1badb6db, + 0x2badb6db, + 0x3badb6db, + 0x0bedb6db, + 0x1bedb6db, + 0x2bedb6db, + 0x3bedb6db, + 0x0b2eb6db, + 0x1b2eb6db, + 0x2b2eb6db, + 0x3b2eb6db, + 0x0b6eb6db, + 0x1b6eb6db, + 0x2b6eb6db, + 0x3b6eb6db, + 0x0baeb6db, + 0x1baeb6db, + 0x2baeb6db, + 0x3baeb6db, +} + +var kNonZeroRepsDepth = [numCommandSymbols]uint32{ + 6, + 6, + 6, + 6, + 12, + 12, + 12, + 12, + 12, + 12, + 12, + 12, + 12, + 12, + 12, + 12, + 12, + 12, + 12, + 12, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 18, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 24, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, + 30, +} + +var kStaticCommandCodeBits = [numCommandSymbols]uint16{ + 0, + 256, + 128, + 384, + 64, + 320, + 192, + 448, + 32, + 288, + 160, + 416, + 96, + 352, + 224, + 480, + 16, + 272, + 144, + 400, + 80, + 336, + 208, + 464, + 48, + 304, + 176, + 432, + 112, + 368, + 240, + 496, + 8, + 264, + 136, + 392, + 72, + 328, + 200, + 456, + 40, + 296, + 168, + 424, + 104, + 360, + 232, + 488, + 24, + 280, + 152, + 408, + 88, + 344, + 216, + 472, + 56, + 312, + 184, + 440, + 120, + 376, + 248, + 504, + 4, + 260, + 132, + 388, + 68, + 324, + 196, + 452, + 36, + 292, + 164, + 420, + 100, + 356, + 228, + 484, + 20, + 276, + 148, + 404, + 84, + 340, + 212, + 468, + 52, + 308, + 180, + 436, + 116, + 372, + 244, + 500, + 12, + 268, + 140, + 396, + 76, + 332, + 204, + 460, + 44, + 300, + 172, + 428, + 108, + 364, + 236, + 492, + 28, + 284, + 156, + 412, + 92, + 348, + 220, + 476, + 60, + 316, + 188, + 444, + 124, + 380, + 252, + 508, + 2, + 258, + 130, + 386, + 66, + 322, + 194, + 450, + 34, + 290, + 162, + 418, + 98, + 354, + 226, + 482, + 18, + 274, + 146, + 402, + 82, + 338, + 210, + 466, + 50, + 306, + 178, + 434, + 114, + 370, + 242, + 498, + 10, + 266, + 138, + 394, + 74, + 330, + 202, + 458, + 42, + 298, + 170, + 426, + 106, + 362, + 234, + 490, + 26, + 282, + 154, + 410, + 90, + 346, + 218, + 474, + 58, + 314, + 186, + 442, + 122, + 378, + 250, + 506, + 6, + 262, + 134, + 390, + 70, + 326, + 198, + 454, + 38, + 294, + 166, + 422, + 102, + 358, + 230, + 486, + 22, + 278, + 150, + 406, + 86, + 342, + 214, + 470, + 54, + 310, + 182, + 438, + 118, + 374, + 246, + 502, + 14, + 270, + 142, + 398, + 78, + 334, + 206, + 462, + 46, + 302, + 174, + 430, + 110, + 366, + 238, + 494, + 30, + 286, + 158, + 414, + 94, + 350, + 222, + 478, + 62, + 318, + 190, + 446, + 126, + 382, + 254, + 510, + 1, + 257, + 129, + 385, + 65, + 321, + 193, + 449, + 33, + 289, + 161, + 417, + 97, + 353, + 225, + 481, + 17, + 273, + 145, + 401, + 81, + 337, + 209, + 465, + 49, + 305, + 177, + 433, + 113, + 369, + 241, + 497, + 9, + 265, + 137, + 393, + 73, + 329, + 201, + 457, + 41, + 297, + 169, + 425, + 105, + 361, + 233, + 489, + 25, + 281, + 153, + 409, + 89, + 345, + 217, + 473, + 57, + 313, + 185, + 441, + 121, + 377, + 249, + 505, + 5, + 261, + 133, + 389, + 69, + 325, + 197, + 453, + 37, + 293, + 165, + 421, + 101, + 357, + 229, + 485, + 21, + 277, + 149, + 405, + 85, + 341, + 213, + 469, + 53, + 309, + 181, + 437, + 117, + 373, + 245, + 501, + 13, + 269, + 141, + 397, + 77, + 333, + 205, + 461, + 45, + 301, + 173, + 429, + 109, + 365, + 237, + 493, + 29, + 285, + 157, + 413, + 93, + 349, + 221, + 477, + 61, + 317, + 189, + 445, + 125, + 381, + 253, + 509, + 3, + 259, + 131, + 387, + 67, + 323, + 195, + 451, + 35, + 291, + 163, + 419, + 99, + 355, + 227, + 483, + 19, + 275, + 147, + 403, + 83, + 339, + 211, + 467, + 51, + 307, + 179, + 435, + 115, + 371, + 243, + 499, + 11, + 267, + 139, + 395, + 75, + 331, + 203, + 459, + 43, + 299, + 171, + 427, + 107, + 363, + 235, + 491, + 27, + 283, + 155, + 411, + 91, + 347, + 219, + 475, + 59, + 315, + 187, + 443, + 123, + 379, + 251, + 507, + 7, + 1031, + 519, + 1543, + 263, + 1287, + 775, + 1799, + 135, + 1159, + 647, + 1671, + 391, + 1415, + 903, + 1927, + 71, + 1095, + 583, + 1607, + 327, + 1351, + 839, + 1863, + 199, + 1223, + 711, + 1735, + 455, + 1479, + 967, + 1991, + 39, + 1063, + 551, + 1575, + 295, + 1319, + 807, + 1831, + 167, + 1191, + 679, + 1703, + 423, + 1447, + 935, + 1959, + 103, + 1127, + 615, + 1639, + 359, + 1383, + 871, + 1895, + 231, + 1255, + 743, + 1767, + 487, + 1511, + 999, + 2023, + 23, + 1047, + 535, + 1559, + 279, + 1303, + 791, + 1815, + 151, + 1175, + 663, + 1687, + 407, + 1431, + 919, + 1943, + 87, + 1111, + 599, + 1623, + 343, + 1367, + 855, + 1879, + 215, + 1239, + 727, + 1751, + 471, + 1495, + 983, + 2007, + 55, + 1079, + 567, + 1591, + 311, + 1335, + 823, + 1847, + 183, + 1207, + 695, + 1719, + 439, + 1463, + 951, + 1975, + 119, + 1143, + 631, + 1655, + 375, + 1399, + 887, + 1911, + 247, + 1271, + 759, + 1783, + 503, + 1527, + 1015, + 2039, + 15, + 1039, + 527, + 1551, + 271, + 1295, + 783, + 1807, + 143, + 1167, + 655, + 1679, + 399, + 1423, + 911, + 1935, + 79, + 1103, + 591, + 1615, + 335, + 1359, + 847, + 1871, + 207, + 1231, + 719, + 1743, + 463, + 1487, + 975, + 1999, + 47, + 1071, + 559, + 1583, + 303, + 1327, + 815, + 1839, + 175, + 1199, + 687, + 1711, + 431, + 1455, + 943, + 1967, + 111, + 1135, + 623, + 1647, + 367, + 1391, + 879, + 1903, + 239, + 1263, + 751, + 1775, + 495, + 1519, + 1007, + 2031, + 31, + 1055, + 543, + 1567, + 287, + 1311, + 799, + 1823, + 159, + 1183, + 671, + 1695, + 415, + 1439, + 927, + 1951, + 95, + 1119, + 607, + 1631, + 351, + 1375, + 863, + 1887, + 223, + 1247, + 735, + 1759, + 479, + 1503, + 991, + 2015, + 63, + 1087, + 575, + 1599, + 319, + 1343, + 831, + 1855, + 191, + 1215, + 703, + 1727, + 447, + 1471, + 959, + 1983, + 127, + 1151, + 639, + 1663, + 383, + 1407, + 895, + 1919, + 255, + 1279, + 767, + 1791, + 511, + 1535, + 1023, + 2047, +} + +func storeStaticCommandHuffmanTree(storage_ix *uint, storage []byte) { + writeBits(56, 0x92624416307003, storage_ix, storage) + writeBits(3, 0x00000000, storage_ix, storage) +} + +var kStaticDistanceCodeBits = [64]uint16{ + 0, + 32, + 16, + 48, + 8, + 40, + 24, + 56, + 4, + 36, + 20, + 52, + 12, + 44, + 28, + 60, + 2, + 34, + 18, + 50, + 10, + 42, + 26, + 58, + 6, + 38, + 22, + 54, + 14, + 46, + 30, + 62, + 1, + 33, + 17, + 49, + 9, + 41, + 25, + 57, + 5, + 37, + 21, + 53, + 13, + 45, + 29, + 61, + 3, + 35, + 19, + 51, + 11, + 43, + 27, + 59, + 7, + 39, + 23, + 55, + 15, + 47, + 31, + 63, +} + +func storeStaticDistanceHuffmanTree(storage_ix *uint, storage []byte) { + writeBits(28, 0x0369DC03, storage_ix, storage) +} diff --git a/backend/vendor/github.com/andybalholm/brotli/fast_log.go b/backend/vendor/github.com/andybalholm/brotli/fast_log.go new file mode 100644 index 0000000..9d6607f --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/fast_log.go @@ -0,0 +1,290 @@ +package brotli + +import ( + "math" + "math/bits" +) + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Utilities for fast computation of logarithms. */ + +func log2FloorNonZero(n uint) uint32 { + return uint32(bits.Len(n)) - 1 +} + +/* A lookup table for small values of log2(int) to be used in entropy + computation. + + ", ".join(["%.16ff" % x for x in [0.0]+[log2(x) for x in range(1, 256)]]) */ +var kLog2Table = []float32{ + 0.0000000000000000, + 0.0000000000000000, + 1.0000000000000000, + 1.5849625007211563, + 2.0000000000000000, + 2.3219280948873622, + 2.5849625007211561, + 2.8073549220576042, + 3.0000000000000000, + 3.1699250014423126, + 3.3219280948873626, + 3.4594316186372978, + 3.5849625007211565, + 3.7004397181410922, + 3.8073549220576037, + 3.9068905956085187, + 4.0000000000000000, + 4.0874628412503400, + 4.1699250014423122, + 4.2479275134435852, + 4.3219280948873626, + 4.3923174227787607, + 4.4594316186372973, + 4.5235619560570131, + 4.5849625007211570, + 4.6438561897747244, + 4.7004397181410926, + 4.7548875021634691, + 4.8073549220576037, + 4.8579809951275728, + 4.9068905956085187, + 4.9541963103868758, + 5.0000000000000000, + 5.0443941193584534, + 5.0874628412503400, + 5.1292830169449664, + 5.1699250014423122, + 5.2094533656289501, + 5.2479275134435852, + 5.2854022188622487, + 5.3219280948873626, + 5.3575520046180838, + 5.3923174227787607, + 5.4262647547020979, + 5.4594316186372973, + 5.4918530963296748, + 5.5235619560570131, + 5.5545888516776376, + 5.5849625007211570, + 5.6147098441152083, + 5.6438561897747244, + 5.6724253419714961, + 5.7004397181410926, + 5.7279204545631996, + 5.7548875021634691, + 5.7813597135246599, + 5.8073549220576046, + 5.8328900141647422, + 5.8579809951275719, + 5.8826430493618416, + 5.9068905956085187, + 5.9307373375628867, + 5.9541963103868758, + 5.9772799234999168, + 6.0000000000000000, + 6.0223678130284544, + 6.0443941193584534, + 6.0660891904577721, + 6.0874628412503400, + 6.1085244567781700, + 6.1292830169449672, + 6.1497471195046822, + 6.1699250014423122, + 6.1898245588800176, + 6.2094533656289510, + 6.2288186904958804, + 6.2479275134435861, + 6.2667865406949019, + 6.2854022188622487, + 6.3037807481771031, + 6.3219280948873617, + 6.3398500028846252, + 6.3575520046180847, + 6.3750394313469254, + 6.3923174227787598, + 6.4093909361377026, + 6.4262647547020979, + 6.4429434958487288, + 6.4594316186372982, + 6.4757334309663976, + 6.4918530963296748, + 6.5077946401986964, + 6.5235619560570131, + 6.5391588111080319, + 6.5545888516776376, + 6.5698556083309478, + 6.5849625007211561, + 6.5999128421871278, + 6.6147098441152092, + 6.6293566200796095, + 6.6438561897747253, + 6.6582114827517955, + 6.6724253419714952, + 6.6865005271832185, + 6.7004397181410917, + 6.7142455176661224, + 6.7279204545631988, + 6.7414669864011465, + 6.7548875021634691, + 6.7681843247769260, + 6.7813597135246599, + 6.7944158663501062, + 6.8073549220576037, + 6.8201789624151887, + 6.8328900141647422, + 6.8454900509443757, + 6.8579809951275719, + 6.8703647195834048, + 6.8826430493618416, + 6.8948177633079437, + 6.9068905956085187, + 6.9188632372745955, + 6.9307373375628867, + 6.9425145053392399, + 6.9541963103868758, + 6.9657842846620879, + 6.9772799234999168, + 6.9886846867721664, + 7.0000000000000000, + 7.0112272554232540, + 7.0223678130284544, + 7.0334230015374501, + 7.0443941193584534, + 7.0552824355011898, + 7.0660891904577721, + 7.0768155970508317, + 7.0874628412503400, + 7.0980320829605272, + 7.1085244567781700, + 7.1189410727235076, + 7.1292830169449664, + 7.1395513523987937, + 7.1497471195046822, + 7.1598713367783891, + 7.1699250014423130, + 7.1799090900149345, + 7.1898245588800176, + 7.1996723448363644, + 7.2094533656289492, + 7.2191685204621621, + 7.2288186904958804, + 7.2384047393250794, + 7.2479275134435861, + 7.2573878426926521, + 7.2667865406949019, + 7.2761244052742384, + 7.2854022188622487, + 7.2946207488916270, + 7.3037807481771031, + 7.3128829552843557, + 7.3219280948873617, + 7.3309168781146177, + 7.3398500028846243, + 7.3487281542310781, + 7.3575520046180847, + 7.3663222142458151, + 7.3750394313469254, + 7.3837042924740528, + 7.3923174227787607, + 7.4008794362821844, + 7.4093909361377026, + 7.4178525148858991, + 7.4262647547020979, + 7.4346282276367255, + 7.4429434958487288, + 7.4512111118323299, + 7.4594316186372973, + 7.4676055500829976, + 7.4757334309663976, + 7.4838157772642564, + 7.4918530963296748, + 7.4998458870832057, + 7.5077946401986964, + 7.5156998382840436, + 7.5235619560570131, + 7.5313814605163119, + 7.5391588111080319, + 7.5468944598876373, + 7.5545888516776376, + 7.5622424242210728, + 7.5698556083309478, + 7.5774288280357487, + 7.5849625007211561, + 7.5924570372680806, + 7.5999128421871278, + 7.6073303137496113, + 7.6147098441152075, + 7.6220518194563764, + 7.6293566200796095, + 7.6366246205436488, + 7.6438561897747244, + 7.6510516911789290, + 7.6582114827517955, + 7.6653359171851765, + 7.6724253419714952, + 7.6794800995054464, + 7.6865005271832185, + 7.6934869574993252, + 7.7004397181410926, + 7.7073591320808825, + 7.7142455176661224, + 7.7210991887071856, + 7.7279204545631996, + 7.7347096202258392, + 7.7414669864011465, + 7.7481928495894596, + 7.7548875021634691, + 7.7615512324444795, + 7.7681843247769260, + 7.7747870596011737, + 7.7813597135246608, + 7.7879025593914317, + 7.7944158663501062, + 7.8008998999203047, + 7.8073549220576037, + 7.8137811912170374, + 7.8201789624151887, + 7.8265484872909159, + 7.8328900141647422, + 7.8392037880969445, + 7.8454900509443757, + 7.8517490414160571, + 7.8579809951275719, + 7.8641861446542798, + 7.8703647195834048, + 7.8765169465650002, + 7.8826430493618425, + 7.8887432488982601, + 7.8948177633079446, + 7.9008668079807496, + 7.9068905956085187, + 7.9128893362299619, + 7.9188632372745955, + 7.9248125036057813, + 7.9307373375628867, + 7.9366379390025719, + 7.9425145053392399, + 7.9483672315846778, + 7.9541963103868758, + 7.9600019320680806, + 7.9657842846620870, + 7.9715435539507720, + 7.9772799234999168, + 7.9829935746943104, + 7.9886846867721664, + 7.9943534368588578, +} + +/* Faster logarithm for small integers, with the property of log2(0) == 0. */ +func fastLog2(v uint) float64 { + if v < uint(len(kLog2Table)) { + return float64(kLog2Table[v]) + } + + return math.Log2(float64(v)) +} diff --git a/backend/vendor/github.com/andybalholm/brotli/find_match_length.go b/backend/vendor/github.com/andybalholm/brotli/find_match_length.go new file mode 100644 index 0000000..b46f88e --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/find_match_length.go @@ -0,0 +1,45 @@ +package brotli + +import ( + "encoding/binary" + "math/bits" + "runtime" +) + +/* Copyright 2010 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Function to find maximal matching prefixes of strings. */ +func findMatchLengthWithLimit(s1 []byte, s2 []byte, limit uint) uint { + var matched uint = 0 + _, _ = s1[limit-1], s2[limit-1] // bounds check + switch runtime.GOARCH { + case "amd64", "arm64": + // Compare 8 bytes at at time. + for matched+8 <= limit { + w1 := binary.LittleEndian.Uint64(s1[matched:]) + w2 := binary.LittleEndian.Uint64(s2[matched:]) + if w1 != w2 { + return matched + uint(bits.TrailingZeros64(w1^w2)>>3) + } + matched += 8 + } + case "386": + // Compare 4 bytes at at time. + for matched+4 <= limit { + w1 := binary.LittleEndian.Uint32(s1[matched:]) + w2 := binary.LittleEndian.Uint32(s2[matched:]) + if w1 != w2 { + return matched + uint(bits.TrailingZeros32(w1^w2)>>3) + } + matched += 4 + } + } + for matched < limit && s1[matched] == s2[matched] { + matched++ + } + return matched +} diff --git a/backend/vendor/github.com/andybalholm/brotli/h10.go b/backend/vendor/github.com/andybalholm/brotli/h10.go new file mode 100644 index 0000000..5662fbb --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/h10.go @@ -0,0 +1,287 @@ +package brotli + +import "encoding/binary" + +/* Copyright 2016 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +func (*h10) HashTypeLength() uint { + return 4 +} + +func (*h10) StoreLookahead() uint { + return 128 +} + +func hashBytesH10(data []byte) uint32 { + var h uint32 = binary.LittleEndian.Uint32(data) * kHashMul32 + + /* The higher bits contain more mixture from the multiplication, + so we take our results from there. */ + return h >> (32 - 17) +} + +/* A (forgetful) hash table where each hash bucket contains a binary tree of + sequences whose first 4 bytes share the same hash code. + Each sequence is 128 long and is identified by its starting + position in the input data. The binary tree is sorted by the lexicographic + order of the sequences, and it is also a max-heap with respect to the + starting positions. */ +type h10 struct { + hasherCommon + window_mask_ uint + buckets_ [1 << 17]uint32 + invalid_pos_ uint32 + forest []uint32 +} + +func (h *h10) Initialize(params *encoderParams) { + h.window_mask_ = (1 << params.lgwin) - 1 + h.invalid_pos_ = uint32(0 - h.window_mask_) + var num_nodes uint = uint(1) << params.lgwin + h.forest = make([]uint32, 2*num_nodes) +} + +func (h *h10) Prepare(one_shot bool, input_size uint, data []byte) { + var invalid_pos uint32 = h.invalid_pos_ + var i uint32 + for i = 0; i < 1<<17; i++ { + h.buckets_[i] = invalid_pos + } +} + +func leftChildIndexH10(self *h10, pos uint) uint { + return 2 * (pos & self.window_mask_) +} + +func rightChildIndexH10(self *h10, pos uint) uint { + return 2*(pos&self.window_mask_) + 1 +} + +/* Stores the hash of the next 4 bytes and in a single tree-traversal, the + hash bucket's binary tree is searched for matches and is re-rooted at the + current position. + + If less than 128 data is available, the hash bucket of the + current position is searched for matches, but the state of the hash table + is not changed, since we can not know the final sorting order of the + current (incomplete) sequence. + + This function must be called with increasing cur_ix positions. */ +func storeAndFindMatchesH10(self *h10, data []byte, cur_ix uint, ring_buffer_mask uint, max_length uint, max_backward uint, best_len *uint, matches []backwardMatch) []backwardMatch { + var cur_ix_masked uint = cur_ix & ring_buffer_mask + var max_comp_len uint = brotli_min_size_t(max_length, 128) + var should_reroot_tree bool = (max_length >= 128) + var key uint32 = hashBytesH10(data[cur_ix_masked:]) + var forest []uint32 = self.forest + var prev_ix uint = uint(self.buckets_[key]) + var node_left uint = leftChildIndexH10(self, cur_ix) + var node_right uint = rightChildIndexH10(self, cur_ix) + var best_len_left uint = 0 + var best_len_right uint = 0 + var depth_remaining uint + /* The forest index of the rightmost node of the left subtree of the new + root, updated as we traverse and re-root the tree of the hash bucket. */ + + /* The forest index of the leftmost node of the right subtree of the new + root, updated as we traverse and re-root the tree of the hash bucket. */ + + /* The match length of the rightmost node of the left subtree of the new + root, updated as we traverse and re-root the tree of the hash bucket. */ + + /* The match length of the leftmost node of the right subtree of the new + root, updated as we traverse and re-root the tree of the hash bucket. */ + if should_reroot_tree { + self.buckets_[key] = uint32(cur_ix) + } + + for depth_remaining = 64; ; depth_remaining-- { + var backward uint = cur_ix - prev_ix + var prev_ix_masked uint = prev_ix & ring_buffer_mask + if backward == 0 || backward > max_backward || depth_remaining == 0 { + if should_reroot_tree { + forest[node_left] = self.invalid_pos_ + forest[node_right] = self.invalid_pos_ + } + + break + } + { + var cur_len uint = brotli_min_size_t(best_len_left, best_len_right) + var len uint + assert(cur_len <= 128) + len = cur_len + findMatchLengthWithLimit(data[cur_ix_masked+cur_len:], data[prev_ix_masked+cur_len:], max_length-cur_len) + if matches != nil && len > *best_len { + *best_len = uint(len) + initBackwardMatch(&matches[0], backward, uint(len)) + matches = matches[1:] + } + + if len >= max_comp_len { + if should_reroot_tree { + forest[node_left] = forest[leftChildIndexH10(self, prev_ix)] + forest[node_right] = forest[rightChildIndexH10(self, prev_ix)] + } + + break + } + + if data[cur_ix_masked+len] > data[prev_ix_masked+len] { + best_len_left = uint(len) + if should_reroot_tree { + forest[node_left] = uint32(prev_ix) + } + + node_left = rightChildIndexH10(self, prev_ix) + prev_ix = uint(forest[node_left]) + } else { + best_len_right = uint(len) + if should_reroot_tree { + forest[node_right] = uint32(prev_ix) + } + + node_right = leftChildIndexH10(self, prev_ix) + prev_ix = uint(forest[node_right]) + } + } + } + + return matches +} + +/* Finds all backward matches of &data[cur_ix & ring_buffer_mask] up to the + length of max_length and stores the position cur_ix in the hash table. + + Sets *num_matches to the number of matches found, and stores the found + matches in matches[0] to matches[*num_matches - 1]. The matches will be + sorted by strictly increasing length and (non-strictly) increasing + distance. */ +func findAllMatchesH10(handle *h10, dictionary *encoderDictionary, data []byte, ring_buffer_mask uint, cur_ix uint, max_length uint, max_backward uint, gap uint, params *encoderParams, matches []backwardMatch) uint { + var orig_matches []backwardMatch = matches + var cur_ix_masked uint = cur_ix & ring_buffer_mask + var best_len uint = 1 + var short_match_max_backward uint + if params.quality != hqZopflificationQuality { + short_match_max_backward = 16 + } else { + short_match_max_backward = 64 + } + var stop uint = cur_ix - short_match_max_backward + var dict_matches [maxStaticDictionaryMatchLen + 1]uint32 + var i uint + if cur_ix < short_match_max_backward { + stop = 0 + } + for i = cur_ix - 1; i > stop && best_len <= 2; i-- { + var prev_ix uint = i + var backward uint = cur_ix - prev_ix + if backward > max_backward { + break + } + + prev_ix &= ring_buffer_mask + if data[cur_ix_masked] != data[prev_ix] || data[cur_ix_masked+1] != data[prev_ix+1] { + continue + } + { + var len uint = findMatchLengthWithLimit(data[prev_ix:], data[cur_ix_masked:], max_length) + if len > best_len { + best_len = uint(len) + initBackwardMatch(&matches[0], backward, uint(len)) + matches = matches[1:] + } + } + } + + if best_len < max_length { + matches = storeAndFindMatchesH10(handle, data, cur_ix, ring_buffer_mask, max_length, max_backward, &best_len, matches) + } + + for i = 0; i <= maxStaticDictionaryMatchLen; i++ { + dict_matches[i] = kInvalidMatch + } + { + var minlen uint = brotli_max_size_t(4, best_len+1) + if findAllStaticDictionaryMatches(dictionary, data[cur_ix_masked:], minlen, max_length, dict_matches[0:]) { + var maxlen uint = brotli_min_size_t(maxStaticDictionaryMatchLen, max_length) + var l uint + for l = minlen; l <= maxlen; l++ { + var dict_id uint32 = dict_matches[l] + if dict_id < kInvalidMatch { + var distance uint = max_backward + gap + uint(dict_id>>5) + 1 + if distance <= params.dist.max_distance { + initDictionaryBackwardMatch(&matches[0], distance, l, uint(dict_id&31)) + matches = matches[1:] + } + } + } + } + } + + return uint(-cap(matches) + cap(orig_matches)) +} + +/* Stores the hash of the next 4 bytes and re-roots the binary tree at the + current sequence, without returning any matches. + REQUIRES: ix + 128 <= end-of-current-block */ +func (h *h10) Store(data []byte, mask uint, ix uint) { + var max_backward uint = h.window_mask_ - windowGap + 1 + /* Maximum distance is window size - 16, see section 9.1. of the spec. */ + storeAndFindMatchesH10(h, data, ix, mask, 128, max_backward, nil, nil) +} + +func (h *h10) StoreRange(data []byte, mask uint, ix_start uint, ix_end uint) { + var i uint = ix_start + var j uint = ix_start + if ix_start+63 <= ix_end { + i = ix_end - 63 + } + + if ix_start+512 <= i { + for ; j < i; j += 8 { + h.Store(data, mask, j) + } + } + + for ; i < ix_end; i++ { + h.Store(data, mask, i) + } +} + +func (h *h10) StitchToPreviousBlock(num_bytes uint, position uint, ringbuffer []byte, ringbuffer_mask uint) { + if num_bytes >= h.HashTypeLength()-1 && position >= 128 { + var i_start uint = position - 128 + 1 + var i_end uint = brotli_min_size_t(position, i_start+num_bytes) + /* Store the last `128 - 1` positions in the hasher. + These could not be calculated before, since they require knowledge + of both the previous and the current block. */ + + var i uint + for i = i_start; i < i_end; i++ { + /* Maximum distance is window size - 16, see section 9.1. of the spec. + Furthermore, we have to make sure that we don't look further back + from the start of the next block than the window size, otherwise we + could access already overwritten areas of the ring-buffer. */ + var max_backward uint = h.window_mask_ - brotli_max_size_t(windowGap-1, position-i) + + /* We know that i + 128 <= position + num_bytes, i.e. the + end of the current block and that we have at least + 128 tail in the ring-buffer. */ + storeAndFindMatchesH10(h, ringbuffer, i, ringbuffer_mask, 128, max_backward, nil, nil) + } + } +} + +/* MAX_NUM_MATCHES == 64 + MAX_TREE_SEARCH_DEPTH */ +const maxNumMatchesH10 = 128 + +func (*h10) FindLongestMatch(dictionary *encoderDictionary, data []byte, ring_buffer_mask uint, distance_cache []int, cur_ix uint, max_length uint, max_backward uint, gap uint, max_distance uint, out *hasherSearchResult) { + panic("unimplemented") +} + +func (*h10) PrepareDistanceCache(distance_cache []int) { + panic("unimplemented") +} diff --git a/backend/vendor/github.com/andybalholm/brotli/h5.go b/backend/vendor/github.com/andybalholm/brotli/h5.go new file mode 100644 index 0000000..f391b73 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/h5.go @@ -0,0 +1,214 @@ +package brotli + +import "encoding/binary" + +/* Copyright 2010 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* A (forgetful) hash table to the data seen by the compressor, to + help create backward references to previous data. + + This is a hash map of fixed size (bucket_size_) to a ring buffer of + fixed size (block_size_). The ring buffer contains the last block_size_ + index positions of the given hash key in the compressed data. */ +func (*h5) HashTypeLength() uint { + return 4 +} + +func (*h5) StoreLookahead() uint { + return 4 +} + +/* HashBytes is the function that chooses the bucket to place the address in. */ +func hashBytesH5(data []byte, shift int) uint32 { + var h uint32 = binary.LittleEndian.Uint32(data) * kHashMul32 + + /* The higher bits contain more mixture from the multiplication, + so we take our results from there. */ + return uint32(h >> uint(shift)) +} + +type h5 struct { + hasherCommon + bucket_size_ uint + block_size_ uint + hash_shift_ int + block_mask_ uint32 + num []uint16 + buckets []uint32 +} + +func (h *h5) Initialize(params *encoderParams) { + h.hash_shift_ = 32 - h.params.bucket_bits + h.bucket_size_ = uint(1) << uint(h.params.bucket_bits) + h.block_size_ = uint(1) << uint(h.params.block_bits) + h.block_mask_ = uint32(h.block_size_ - 1) + h.num = make([]uint16, h.bucket_size_) + h.buckets = make([]uint32, h.block_size_*h.bucket_size_) +} + +func (h *h5) Prepare(one_shot bool, input_size uint, data []byte) { + var num []uint16 = h.num + var partial_prepare_threshold uint = h.bucket_size_ >> 6 + /* Partial preparation is 100 times slower (per socket). */ + if one_shot && input_size <= partial_prepare_threshold { + var i uint + for i = 0; i < input_size; i++ { + var key uint32 = hashBytesH5(data[i:], h.hash_shift_) + num[key] = 0 + } + } else { + for i := 0; i < int(h.bucket_size_); i++ { + num[i] = 0 + } + } +} + +/* Look at 4 bytes at &data[ix & mask]. + Compute a hash from these, and store the value of ix at that position. */ +func (h *h5) Store(data []byte, mask uint, ix uint) { + var num []uint16 = h.num + var key uint32 = hashBytesH5(data[ix&mask:], h.hash_shift_) + var minor_ix uint = uint(num[key]) & uint(h.block_mask_) + var offset uint = minor_ix + uint(key<= h.HashTypeLength()-1 && position >= 3 { + /* Prepare the hashes for three last bytes of the last write. + These could not be calculated before, since they require knowledge + of both the previous and the current block. */ + h.Store(ringbuffer, ringbuffer_mask, position-3) + h.Store(ringbuffer, ringbuffer_mask, position-2) + h.Store(ringbuffer, ringbuffer_mask, position-1) + } +} + +func (h *h5) PrepareDistanceCache(distance_cache []int) { + prepareDistanceCache(distance_cache, h.params.num_last_distances_to_check) +} + +/* Find a longest backward match of &data[cur_ix] up to the length of + max_length and stores the position cur_ix in the hash table. + + REQUIRES: PrepareDistanceCacheH5 must be invoked for current distance cache + values; if this method is invoked repeatedly with the same distance + cache values, it is enough to invoke PrepareDistanceCacheH5 once. + + Does not look for matches longer than max_length. + Does not look for matches further away than max_backward. + Writes the best match into |out|. + |out|->score is updated only if a better match is found. */ +func (h *h5) FindLongestMatch(dictionary *encoderDictionary, data []byte, ring_buffer_mask uint, distance_cache []int, cur_ix uint, max_length uint, max_backward uint, gap uint, max_distance uint, out *hasherSearchResult) { + var num []uint16 = h.num + var buckets []uint32 = h.buckets + var cur_ix_masked uint = cur_ix & ring_buffer_mask + var min_score uint = out.score + var best_score uint = out.score + var best_len uint = out.len + var i uint + var bucket []uint32 + /* Don't accept a short copy from far away. */ + out.len = 0 + + out.len_code_delta = 0 + + /* Try last distance first. */ + for i = 0; i < uint(h.params.num_last_distances_to_check); i++ { + var backward uint = uint(distance_cache[i]) + var prev_ix uint = uint(cur_ix - backward) + if prev_ix >= cur_ix { + continue + } + + if backward > max_backward { + continue + } + + prev_ix &= ring_buffer_mask + + if cur_ix_masked+best_len > ring_buffer_mask || prev_ix+best_len > ring_buffer_mask || data[cur_ix_masked+best_len] != data[prev_ix+best_len] { + continue + } + { + var len uint = findMatchLengthWithLimit(data[prev_ix:], data[cur_ix_masked:], max_length) + if len >= 3 || (len == 2 && i < 2) { + /* Comparing for >= 2 does not change the semantics, but just saves for + a few unnecessary binary logarithms in backward reference score, + since we are not interested in such short matches. */ + var score uint = backwardReferenceScoreUsingLastDistance(uint(len)) + if best_score < score { + if i != 0 { + score -= backwardReferencePenaltyUsingLastDistance(i) + } + if best_score < score { + best_score = score + best_len = uint(len) + out.len = best_len + out.distance = backward + out.score = best_score + } + } + } + } + } + { + var key uint32 = hashBytesH5(data[cur_ix_masked:], h.hash_shift_) + bucket = buckets[key< h.block_size_ { + down = uint(num[key]) - h.block_size_ + } else { + down = 0 + } + for i = uint(num[key]); i > down; { + var prev_ix uint + i-- + prev_ix = uint(bucket[uint32(i)&h.block_mask_]) + var backward uint = cur_ix - prev_ix + if backward > max_backward { + break + } + + prev_ix &= ring_buffer_mask + if cur_ix_masked+best_len > ring_buffer_mask || prev_ix+best_len > ring_buffer_mask || data[cur_ix_masked+best_len] != data[prev_ix+best_len] { + continue + } + { + var len uint = findMatchLengthWithLimit(data[prev_ix:], data[cur_ix_masked:], max_length) + if len >= 4 { + /* Comparing for >= 3 does not change the semantics, but just saves + for a few unnecessary binary logarithms in backward reference + score, since we are not interested in such short matches. */ + var score uint = backwardReferenceScore(uint(len), backward) + if best_score < score { + best_score = score + best_len = uint(len) + out.len = best_len + out.distance = backward + out.score = best_score + } + } + } + } + + bucket[uint32(num[key])&h.block_mask_] = uint32(cur_ix) + num[key]++ + } + + if min_score == out.score { + searchInStaticDictionary(dictionary, h, data[cur_ix_masked:], max_length, max_backward+gap, max_distance, out, false) + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/h6.go b/backend/vendor/github.com/andybalholm/brotli/h6.go new file mode 100644 index 0000000..80bb224 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/h6.go @@ -0,0 +1,216 @@ +package brotli + +import "encoding/binary" + +/* Copyright 2010 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* A (forgetful) hash table to the data seen by the compressor, to + help create backward references to previous data. + + This is a hash map of fixed size (bucket_size_) to a ring buffer of + fixed size (block_size_). The ring buffer contains the last block_size_ + index positions of the given hash key in the compressed data. */ +func (*h6) HashTypeLength() uint { + return 8 +} + +func (*h6) StoreLookahead() uint { + return 8 +} + +/* HashBytes is the function that chooses the bucket to place the address in. */ +func hashBytesH6(data []byte, mask uint64, shift int) uint32 { + var h uint64 = (binary.LittleEndian.Uint64(data) & mask) * kHashMul64Long + + /* The higher bits contain more mixture from the multiplication, + so we take our results from there. */ + return uint32(h >> uint(shift)) +} + +type h6 struct { + hasherCommon + bucket_size_ uint + block_size_ uint + hash_shift_ int + hash_mask_ uint64 + block_mask_ uint32 + num []uint16 + buckets []uint32 +} + +func (h *h6) Initialize(params *encoderParams) { + h.hash_shift_ = 64 - h.params.bucket_bits + h.hash_mask_ = (^(uint64(0))) >> uint(64-8*h.params.hash_len) + h.bucket_size_ = uint(1) << uint(h.params.bucket_bits) + h.block_size_ = uint(1) << uint(h.params.block_bits) + h.block_mask_ = uint32(h.block_size_ - 1) + h.num = make([]uint16, h.bucket_size_) + h.buckets = make([]uint32, h.block_size_*h.bucket_size_) +} + +func (h *h6) Prepare(one_shot bool, input_size uint, data []byte) { + var num []uint16 = h.num + var partial_prepare_threshold uint = h.bucket_size_ >> 6 + /* Partial preparation is 100 times slower (per socket). */ + if one_shot && input_size <= partial_prepare_threshold { + var i uint + for i = 0; i < input_size; i++ { + var key uint32 = hashBytesH6(data[i:], h.hash_mask_, h.hash_shift_) + num[key] = 0 + } + } else { + for i := 0; i < int(h.bucket_size_); i++ { + num[i] = 0 + } + } +} + +/* Look at 4 bytes at &data[ix & mask]. + Compute a hash from these, and store the value of ix at that position. */ +func (h *h6) Store(data []byte, mask uint, ix uint) { + var num []uint16 = h.num + var key uint32 = hashBytesH6(data[ix&mask:], h.hash_mask_, h.hash_shift_) + var minor_ix uint = uint(num[key]) & uint(h.block_mask_) + var offset uint = minor_ix + uint(key<= h.HashTypeLength()-1 && position >= 3 { + /* Prepare the hashes for three last bytes of the last write. + These could not be calculated before, since they require knowledge + of both the previous and the current block. */ + h.Store(ringbuffer, ringbuffer_mask, position-3) + h.Store(ringbuffer, ringbuffer_mask, position-2) + h.Store(ringbuffer, ringbuffer_mask, position-1) + } +} + +func (h *h6) PrepareDistanceCache(distance_cache []int) { + prepareDistanceCache(distance_cache, h.params.num_last_distances_to_check) +} + +/* Find a longest backward match of &data[cur_ix] up to the length of + max_length and stores the position cur_ix in the hash table. + + REQUIRES: PrepareDistanceCacheH6 must be invoked for current distance cache + values; if this method is invoked repeatedly with the same distance + cache values, it is enough to invoke PrepareDistanceCacheH6 once. + + Does not look for matches longer than max_length. + Does not look for matches further away than max_backward. + Writes the best match into |out|. + |out|->score is updated only if a better match is found. */ +func (h *h6) FindLongestMatch(dictionary *encoderDictionary, data []byte, ring_buffer_mask uint, distance_cache []int, cur_ix uint, max_length uint, max_backward uint, gap uint, max_distance uint, out *hasherSearchResult) { + var num []uint16 = h.num + var buckets []uint32 = h.buckets + var cur_ix_masked uint = cur_ix & ring_buffer_mask + var min_score uint = out.score + var best_score uint = out.score + var best_len uint = out.len + var i uint + var bucket []uint32 + /* Don't accept a short copy from far away. */ + out.len = 0 + + out.len_code_delta = 0 + + /* Try last distance first. */ + for i = 0; i < uint(h.params.num_last_distances_to_check); i++ { + var backward uint = uint(distance_cache[i]) + var prev_ix uint = uint(cur_ix - backward) + if prev_ix >= cur_ix { + continue + } + + if backward > max_backward { + continue + } + + prev_ix &= ring_buffer_mask + + if cur_ix_masked+best_len > ring_buffer_mask || prev_ix+best_len > ring_buffer_mask || data[cur_ix_masked+best_len] != data[prev_ix+best_len] { + continue + } + { + var len uint = findMatchLengthWithLimit(data[prev_ix:], data[cur_ix_masked:], max_length) + if len >= 3 || (len == 2 && i < 2) { + /* Comparing for >= 2 does not change the semantics, but just saves for + a few unnecessary binary logarithms in backward reference score, + since we are not interested in such short matches. */ + var score uint = backwardReferenceScoreUsingLastDistance(uint(len)) + if best_score < score { + if i != 0 { + score -= backwardReferencePenaltyUsingLastDistance(i) + } + if best_score < score { + best_score = score + best_len = uint(len) + out.len = best_len + out.distance = backward + out.score = best_score + } + } + } + } + } + { + var key uint32 = hashBytesH6(data[cur_ix_masked:], h.hash_mask_, h.hash_shift_) + bucket = buckets[key< h.block_size_ { + down = uint(num[key]) - h.block_size_ + } else { + down = 0 + } + for i = uint(num[key]); i > down; { + var prev_ix uint + i-- + prev_ix = uint(bucket[uint32(i)&h.block_mask_]) + var backward uint = cur_ix - prev_ix + if backward > max_backward { + break + } + + prev_ix &= ring_buffer_mask + if cur_ix_masked+best_len > ring_buffer_mask || prev_ix+best_len > ring_buffer_mask || data[cur_ix_masked+best_len] != data[prev_ix+best_len] { + continue + } + { + var len uint = findMatchLengthWithLimit(data[prev_ix:], data[cur_ix_masked:], max_length) + if len >= 4 { + /* Comparing for >= 3 does not change the semantics, but just saves + for a few unnecessary binary logarithms in backward reference + score, since we are not interested in such short matches. */ + var score uint = backwardReferenceScore(uint(len), backward) + if best_score < score { + best_score = score + best_len = uint(len) + out.len = best_len + out.distance = backward + out.score = best_score + } + } + } + } + + bucket[uint32(num[key])&h.block_mask_] = uint32(cur_ix) + num[key]++ + } + + if min_score == out.score { + searchInStaticDictionary(dictionary, h, data[cur_ix_masked:], max_length, max_backward+gap, max_distance, out, false) + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/hash.go b/backend/vendor/github.com/andybalholm/brotli/hash.go new file mode 100644 index 0000000..00f812e --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/hash.go @@ -0,0 +1,342 @@ +package brotli + +import ( + "encoding/binary" + "fmt" +) + +type hasherCommon struct { + params hasherParams + is_prepared_ bool + dict_num_lookups uint + dict_num_matches uint +} + +func (h *hasherCommon) Common() *hasherCommon { + return h +} + +type hasherHandle interface { + Common() *hasherCommon + Initialize(params *encoderParams) + Prepare(one_shot bool, input_size uint, data []byte) + StitchToPreviousBlock(num_bytes uint, position uint, ringbuffer []byte, ringbuffer_mask uint) + HashTypeLength() uint + StoreLookahead() uint + PrepareDistanceCache(distance_cache []int) + FindLongestMatch(dictionary *encoderDictionary, data []byte, ring_buffer_mask uint, distance_cache []int, cur_ix uint, max_length uint, max_backward uint, gap uint, max_distance uint, out *hasherSearchResult) + StoreRange(data []byte, mask uint, ix_start uint, ix_end uint) + Store(data []byte, mask uint, ix uint) +} + +const kCutoffTransformsCount uint32 = 10 + +/* 0, 12, 27, 23, 42, 63, 56, 48, 59, 64 */ +/* 0+0, 4+8, 8+19, 12+11, 16+26, 20+43, 24+32, 28+20, 32+27, 36+28 */ +const kCutoffTransforms uint64 = 0x071B520ADA2D3200 + +type hasherSearchResult struct { + len uint + distance uint + score uint + len_code_delta int +} + +/* kHashMul32 multiplier has these properties: + * The multiplier must be odd. Otherwise we may lose the highest bit. + * No long streaks of ones or zeros. + * There is no effort to ensure that it is a prime, the oddity is enough + for this use. + * The number has been tuned heuristically against compression benchmarks. */ +const kHashMul32 uint32 = 0x1E35A7BD + +const kHashMul64 uint64 = 0x1E35A7BD1E35A7BD + +const kHashMul64Long uint64 = 0x1FE35A7BD3579BD3 + +func hash14(data []byte) uint32 { + var h uint32 = binary.LittleEndian.Uint32(data) * kHashMul32 + + /* The higher bits contain more mixture from the multiplication, + so we take our results from there. */ + return h >> (32 - 14) +} + +func prepareDistanceCache(distance_cache []int, num_distances int) { + if num_distances > 4 { + var last_distance int = distance_cache[0] + distance_cache[4] = last_distance - 1 + distance_cache[5] = last_distance + 1 + distance_cache[6] = last_distance - 2 + distance_cache[7] = last_distance + 2 + distance_cache[8] = last_distance - 3 + distance_cache[9] = last_distance + 3 + if num_distances > 10 { + var next_last_distance int = distance_cache[1] + distance_cache[10] = next_last_distance - 1 + distance_cache[11] = next_last_distance + 1 + distance_cache[12] = next_last_distance - 2 + distance_cache[13] = next_last_distance + 2 + distance_cache[14] = next_last_distance - 3 + distance_cache[15] = next_last_distance + 3 + } + } +} + +const literalByteScore = 135 + +const distanceBitPenalty = 30 + +/* Score must be positive after applying maximal penalty. */ +const scoreBase = (distanceBitPenalty * 8 * 8) + +/* Usually, we always choose the longest backward reference. This function + allows for the exception of that rule. + + If we choose a backward reference that is further away, it will + usually be coded with more bits. We approximate this by assuming + log2(distance). If the distance can be expressed in terms of the + last four distances, we use some heuristic constants to estimate + the bits cost. For the first up to four literals we use the bit + cost of the literals from the literal cost model, after that we + use the average bit cost of the cost model. + + This function is used to sometimes discard a longer backward reference + when it is not much longer and the bit cost for encoding it is more + than the saved literals. + + backward_reference_offset MUST be positive. */ +func backwardReferenceScore(copy_length uint, backward_reference_offset uint) uint { + return scoreBase + literalByteScore*uint(copy_length) - distanceBitPenalty*uint(log2FloorNonZero(backward_reference_offset)) +} + +func backwardReferenceScoreUsingLastDistance(copy_length uint) uint { + return literalByteScore*uint(copy_length) + scoreBase + 15 +} + +func backwardReferencePenaltyUsingLastDistance(distance_short_code uint) uint { + return uint(39) + ((0x1CA10 >> (distance_short_code & 0xE)) & 0xE) +} + +func testStaticDictionaryItem(dictionary *encoderDictionary, item uint, data []byte, max_length uint, max_backward uint, max_distance uint, out *hasherSearchResult) bool { + var len uint + var word_idx uint + var offset uint + var matchlen uint + var backward uint + var score uint + len = item & 0x1F + word_idx = item >> 5 + offset = uint(dictionary.words.offsets_by_length[len]) + len*word_idx + if len > max_length { + return false + } + + matchlen = findMatchLengthWithLimit(data, dictionary.words.data[offset:], uint(len)) + if matchlen+uint(dictionary.cutoffTransformsCount) <= len || matchlen == 0 { + return false + } + { + var cut uint = len - matchlen + var transform_id uint = (cut << 2) + uint((dictionary.cutoffTransforms>>(cut*6))&0x3F) + backward = max_backward + 1 + word_idx + (transform_id << dictionary.words.size_bits_by_length[len]) + } + + if backward > max_distance { + return false + } + + score = backwardReferenceScore(matchlen, backward) + if score < out.score { + return false + } + + out.len = matchlen + out.len_code_delta = int(len) - int(matchlen) + out.distance = backward + out.score = score + return true +} + +func searchInStaticDictionary(dictionary *encoderDictionary, handle hasherHandle, data []byte, max_length uint, max_backward uint, max_distance uint, out *hasherSearchResult, shallow bool) { + var key uint + var i uint + var self *hasherCommon = handle.Common() + if self.dict_num_matches < self.dict_num_lookups>>7 { + return + } + + key = uint(hash14(data) << 1) + for i = 0; ; (func() { i++; key++ })() { + var tmp uint + if shallow { + tmp = 1 + } else { + tmp = 2 + } + if i >= tmp { + break + } + var item uint = uint(dictionary.hash_table[key]) + self.dict_num_lookups++ + if item != 0 { + var item_matches bool = testStaticDictionaryItem(dictionary, item, data, max_length, max_backward, max_distance, out) + if item_matches { + self.dict_num_matches++ + } + } + } +} + +type backwardMatch struct { + distance uint32 + length_and_code uint32 +} + +func initBackwardMatch(self *backwardMatch, dist uint, len uint) { + self.distance = uint32(dist) + self.length_and_code = uint32(len << 5) +} + +func initDictionaryBackwardMatch(self *backwardMatch, dist uint, len uint, len_code uint) { + self.distance = uint32(dist) + var tmp uint + if len == len_code { + tmp = 0 + } else { + tmp = len_code + } + self.length_and_code = uint32(len<<5 | tmp) +} + +func backwardMatchLength(self *backwardMatch) uint { + return uint(self.length_and_code >> 5) +} + +func backwardMatchLengthCode(self *backwardMatch) uint { + var code uint = uint(self.length_and_code) & 31 + if code != 0 { + return code + } else { + return backwardMatchLength(self) + } +} + +func hasherReset(handle hasherHandle) { + if handle == nil { + return + } + handle.Common().is_prepared_ = false +} + +func newHasher(typ int) hasherHandle { + switch typ { + case 2: + return &hashLongestMatchQuickly{ + bucketBits: 16, + bucketSweep: 1, + hashLen: 5, + useDictionary: true, + } + case 3: + return &hashLongestMatchQuickly{ + bucketBits: 16, + bucketSweep: 2, + hashLen: 5, + useDictionary: false, + } + case 4: + return &hashLongestMatchQuickly{ + bucketBits: 17, + bucketSweep: 4, + hashLen: 5, + useDictionary: true, + } + case 5: + return new(h5) + case 6: + return new(h6) + case 10: + return new(h10) + case 35: + return &hashComposite{ + ha: newHasher(3), + hb: &hashRolling{jump: 4}, + } + case 40: + return &hashForgetfulChain{ + bucketBits: 15, + numBanks: 1, + bankBits: 16, + numLastDistancesToCheck: 4, + } + case 41: + return &hashForgetfulChain{ + bucketBits: 15, + numBanks: 1, + bankBits: 16, + numLastDistancesToCheck: 10, + } + case 42: + return &hashForgetfulChain{ + bucketBits: 15, + numBanks: 512, + bankBits: 9, + numLastDistancesToCheck: 16, + } + case 54: + return &hashLongestMatchQuickly{ + bucketBits: 20, + bucketSweep: 4, + hashLen: 7, + useDictionary: false, + } + case 55: + return &hashComposite{ + ha: newHasher(54), + hb: &hashRolling{jump: 4}, + } + case 65: + return &hashComposite{ + ha: newHasher(6), + hb: &hashRolling{jump: 1}, + } + } + + panic(fmt.Sprintf("unknown hasher type: %d", typ)) +} + +func hasherSetup(handle *hasherHandle, params *encoderParams, data []byte, position uint, input_size uint, is_last bool) { + var self hasherHandle = nil + var common *hasherCommon = nil + var one_shot bool = (position == 0 && is_last) + if *handle == nil { + chooseHasher(params, ¶ms.hasher) + self = newHasher(params.hasher.type_) + + *handle = self + common = self.Common() + common.params = params.hasher + self.Initialize(params) + } + + self = *handle + common = self.Common() + if !common.is_prepared_ { + self.Prepare(one_shot, input_size, data) + + if position == 0 { + common.dict_num_lookups = 0 + common.dict_num_matches = 0 + } + + common.is_prepared_ = true + } +} + +func initOrStitchToPreviousBlock(handle *hasherHandle, data []byte, mask uint, params *encoderParams, position uint, input_size uint, is_last bool) { + var self hasherHandle + hasherSetup(handle, params, data, position, input_size, is_last) + self = *handle + self.StitchToPreviousBlock(input_size, position, data, mask) +} diff --git a/backend/vendor/github.com/andybalholm/brotli/hash_composite.go b/backend/vendor/github.com/andybalholm/brotli/hash_composite.go new file mode 100644 index 0000000..a65fe2e --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/hash_composite.go @@ -0,0 +1,93 @@ +package brotli + +/* Copyright 2018 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +func (h *hashComposite) HashTypeLength() uint { + var a uint = h.ha.HashTypeLength() + var b uint = h.hb.HashTypeLength() + if a > b { + return a + } else { + return b + } +} + +func (h *hashComposite) StoreLookahead() uint { + var a uint = h.ha.StoreLookahead() + var b uint = h.hb.StoreLookahead() + if a > b { + return a + } else { + return b + } +} + +/* Composite hasher: This hasher allows to combine two other hashers, HASHER_A + and HASHER_B. */ +type hashComposite struct { + hasherCommon + ha hasherHandle + hb hasherHandle + params *encoderParams +} + +func (h *hashComposite) Initialize(params *encoderParams) { + h.params = params +} + +/* TODO: Initialize of the hashers is defered to Prepare (and params + remembered here) because we don't get the one_shot and input_size params + here that are needed to know the memory size of them. Instead provide + those params to all hashers InitializehashComposite */ +func (h *hashComposite) Prepare(one_shot bool, input_size uint, data []byte) { + if h.ha == nil { + var common_a *hasherCommon + var common_b *hasherCommon + + common_a = h.ha.Common() + common_a.params = h.params.hasher + common_a.is_prepared_ = false + common_a.dict_num_lookups = 0 + common_a.dict_num_matches = 0 + h.ha.Initialize(h.params) + + common_b = h.hb.Common() + common_b.params = h.params.hasher + common_b.is_prepared_ = false + common_b.dict_num_lookups = 0 + common_b.dict_num_matches = 0 + h.hb.Initialize(h.params) + } + + h.ha.Prepare(one_shot, input_size, data) + h.hb.Prepare(one_shot, input_size, data) +} + +func (h *hashComposite) Store(data []byte, mask uint, ix uint) { + h.ha.Store(data, mask, ix) + h.hb.Store(data, mask, ix) +} + +func (h *hashComposite) StoreRange(data []byte, mask uint, ix_start uint, ix_end uint) { + h.ha.StoreRange(data, mask, ix_start, ix_end) + h.hb.StoreRange(data, mask, ix_start, ix_end) +} + +func (h *hashComposite) StitchToPreviousBlock(num_bytes uint, position uint, ringbuffer []byte, ring_buffer_mask uint) { + h.ha.StitchToPreviousBlock(num_bytes, position, ringbuffer, ring_buffer_mask) + h.hb.StitchToPreviousBlock(num_bytes, position, ringbuffer, ring_buffer_mask) +} + +func (h *hashComposite) PrepareDistanceCache(distance_cache []int) { + h.ha.PrepareDistanceCache(distance_cache) + h.hb.PrepareDistanceCache(distance_cache) +} + +func (h *hashComposite) FindLongestMatch(dictionary *encoderDictionary, data []byte, ring_buffer_mask uint, distance_cache []int, cur_ix uint, max_length uint, max_backward uint, gap uint, max_distance uint, out *hasherSearchResult) { + h.ha.FindLongestMatch(dictionary, data, ring_buffer_mask, distance_cache, cur_ix, max_length, max_backward, gap, max_distance, out) + h.hb.FindLongestMatch(dictionary, data, ring_buffer_mask, distance_cache, cur_ix, max_length, max_backward, gap, max_distance, out) +} diff --git a/backend/vendor/github.com/andybalholm/brotli/hash_forgetful_chain.go b/backend/vendor/github.com/andybalholm/brotli/hash_forgetful_chain.go new file mode 100644 index 0000000..306e46d --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/hash_forgetful_chain.go @@ -0,0 +1,252 @@ +package brotli + +import "encoding/binary" + +/* Copyright 2016 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +func (*hashForgetfulChain) HashTypeLength() uint { + return 4 +} + +func (*hashForgetfulChain) StoreLookahead() uint { + return 4 +} + +/* HashBytes is the function that chooses the bucket to place the address in.*/ +func (h *hashForgetfulChain) HashBytes(data []byte) uint { + var hash uint32 = binary.LittleEndian.Uint32(data) * kHashMul32 + + /* The higher bits contain more mixture from the multiplication, + so we take our results from there. */ + return uint(hash >> (32 - h.bucketBits)) +} + +type slot struct { + delta uint16 + next uint16 +} + +/* A (forgetful) hash table to the data seen by the compressor, to + help create backward references to previous data. + + Hashes are stored in chains which are bucketed to groups. Group of chains + share a storage "bank". When more than "bank size" chain nodes are added, + oldest nodes are replaced; this way several chains may share a tail. */ +type hashForgetfulChain struct { + hasherCommon + + bucketBits uint + numBanks uint + bankBits uint + numLastDistancesToCheck int + + addr []uint32 + head []uint16 + tiny_hash [65536]byte + banks [][]slot + free_slot_idx []uint16 + max_hops uint +} + +func (h *hashForgetfulChain) Initialize(params *encoderParams) { + var q uint + if params.quality > 6 { + q = 7 + } else { + q = 8 + } + h.max_hops = q << uint(params.quality-4) + + bankSize := 1 << h.bankBits + bucketSize := 1 << h.bucketBits + + h.addr = make([]uint32, bucketSize) + h.head = make([]uint16, bucketSize) + h.banks = make([][]slot, h.numBanks) + for i := range h.banks { + h.banks[i] = make([]slot, bankSize) + } + h.free_slot_idx = make([]uint16, h.numBanks) +} + +func (h *hashForgetfulChain) Prepare(one_shot bool, input_size uint, data []byte) { + var partial_prepare_threshold uint = (1 << h.bucketBits) >> 6 + /* Partial preparation is 100 times slower (per socket). */ + if one_shot && input_size <= partial_prepare_threshold { + var i uint + for i = 0; i < input_size; i++ { + var bucket uint = h.HashBytes(data[i:]) + + /* See InitEmpty comment. */ + h.addr[bucket] = 0xCCCCCCCC + + h.head[bucket] = 0xCCCC + } + } else { + /* Fill |addr| array with 0xCCCCCCCC value. Because of wrapping, position + processed by hasher never reaches 3GB + 64M; this makes all new chains + to be terminated after the first node. */ + for i := range h.addr { + h.addr[i] = 0xCCCCCCCC + } + + for i := range h.head { + h.head[i] = 0 + } + } + + h.tiny_hash = [65536]byte{} + for i := range h.free_slot_idx { + h.free_slot_idx[i] = 0 + } +} + +/* Look at 4 bytes at &data[ix & mask]. Compute a hash from these, and prepend + node to corresponding chain; also update tiny_hash for current position. */ +func (h *hashForgetfulChain) Store(data []byte, mask uint, ix uint) { + var key uint = h.HashBytes(data[ix&mask:]) + var bank uint = key & (h.numBanks - 1) + idx := uint(h.free_slot_idx[bank]) & ((1 << h.bankBits) - 1) + h.free_slot_idx[bank]++ + var delta uint = ix - uint(h.addr[key]) + h.tiny_hash[uint16(ix)] = byte(key) + if delta > 0xFFFF { + delta = 0xFFFF + } + h.banks[bank][idx].delta = uint16(delta) + h.banks[bank][idx].next = h.head[key] + h.addr[key] = uint32(ix) + h.head[key] = uint16(idx) +} + +func (h *hashForgetfulChain) StoreRange(data []byte, mask uint, ix_start uint, ix_end uint) { + var i uint + for i = ix_start; i < ix_end; i++ { + h.Store(data, mask, i) + } +} + +func (h *hashForgetfulChain) StitchToPreviousBlock(num_bytes uint, position uint, ringbuffer []byte, ring_buffer_mask uint) { + if num_bytes >= h.HashTypeLength()-1 && position >= 3 { + /* Prepare the hashes for three last bytes of the last write. + These could not be calculated before, since they require knowledge + of both the previous and the current block. */ + h.Store(ringbuffer, ring_buffer_mask, position-3) + h.Store(ringbuffer, ring_buffer_mask, position-2) + h.Store(ringbuffer, ring_buffer_mask, position-1) + } +} + +func (h *hashForgetfulChain) PrepareDistanceCache(distance_cache []int) { + prepareDistanceCache(distance_cache, h.numLastDistancesToCheck) +} + +/* Find a longest backward match of &data[cur_ix] up to the length of + max_length and stores the position cur_ix in the hash table. + + REQUIRES: PrepareDistanceCachehashForgetfulChain must be invoked for current distance cache + values; if this method is invoked repeatedly with the same distance + cache values, it is enough to invoke PrepareDistanceCachehashForgetfulChain once. + + Does not look for matches longer than max_length. + Does not look for matches further away than max_backward. + Writes the best match into |out|. + |out|->score is updated only if a better match is found. */ +func (h *hashForgetfulChain) FindLongestMatch(dictionary *encoderDictionary, data []byte, ring_buffer_mask uint, distance_cache []int, cur_ix uint, max_length uint, max_backward uint, gap uint, max_distance uint, out *hasherSearchResult) { + var cur_ix_masked uint = cur_ix & ring_buffer_mask + var min_score uint = out.score + var best_score uint = out.score + var best_len uint = out.len + var key uint = h.HashBytes(data[cur_ix_masked:]) + var tiny_hash byte = byte(key) + /* Don't accept a short copy from far away. */ + out.len = 0 + + out.len_code_delta = 0 + + /* Try last distance first. */ + for i := 0; i < h.numLastDistancesToCheck; i++ { + var backward uint = uint(distance_cache[i]) + var prev_ix uint = (cur_ix - backward) + + /* For distance code 0 we want to consider 2-byte matches. */ + if i > 0 && h.tiny_hash[uint16(prev_ix)] != tiny_hash { + continue + } + if prev_ix >= cur_ix || backward > max_backward { + continue + } + + prev_ix &= ring_buffer_mask + { + var len uint = findMatchLengthWithLimit(data[prev_ix:], data[cur_ix_masked:], max_length) + if len >= 2 { + var score uint = backwardReferenceScoreUsingLastDistance(uint(len)) + if best_score < score { + if i != 0 { + score -= backwardReferencePenaltyUsingLastDistance(uint(i)) + } + if best_score < score { + best_score = score + best_len = uint(len) + out.len = best_len + out.distance = backward + out.score = best_score + } + } + } + } + } + { + var bank uint = key & (h.numBanks - 1) + var backward uint = 0 + var hops uint = h.max_hops + var delta uint = cur_ix - uint(h.addr[key]) + var slot uint = uint(h.head[key]) + for { + tmp6 := hops + hops-- + if tmp6 == 0 { + break + } + var prev_ix uint + var last uint = slot + backward += delta + if backward > max_backward { + break + } + prev_ix = (cur_ix - backward) & ring_buffer_mask + slot = uint(h.banks[bank][last].next) + delta = uint(h.banks[bank][last].delta) + if cur_ix_masked+best_len > ring_buffer_mask || prev_ix+best_len > ring_buffer_mask || data[cur_ix_masked+best_len] != data[prev_ix+best_len] { + continue + } + { + var len uint = findMatchLengthWithLimit(data[prev_ix:], data[cur_ix_masked:], max_length) + if len >= 4 { + /* Comparing for >= 3 does not change the semantics, but just saves + for a few unnecessary binary logarithms in backward reference + score, since we are not interested in such short matches. */ + var score uint = backwardReferenceScore(uint(len), backward) + if best_score < score { + best_score = score + best_len = uint(len) + out.len = best_len + out.distance = backward + out.score = best_score + } + } + } + } + + h.Store(data, ring_buffer_mask, cur_ix) + } + + if out.score == min_score { + searchInStaticDictionary(dictionary, h, data[cur_ix_masked:], max_length, max_backward+gap, max_distance, out, false) + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/hash_longest_match_quickly.go b/backend/vendor/github.com/andybalholm/brotli/hash_longest_match_quickly.go new file mode 100644 index 0000000..9375dc1 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/hash_longest_match_quickly.go @@ -0,0 +1,214 @@ +package brotli + +import "encoding/binary" + +/* Copyright 2010 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* For BUCKET_SWEEP == 1, enabling the dictionary lookup makes compression + a little faster (0.5% - 1%) and it compresses 0.15% better on small text + and HTML inputs. */ + +func (*hashLongestMatchQuickly) HashTypeLength() uint { + return 8 +} + +func (*hashLongestMatchQuickly) StoreLookahead() uint { + return 8 +} + +/* HashBytes is the function that chooses the bucket to place + the address in. The HashLongestMatch and hashLongestMatchQuickly + classes have separate, different implementations of hashing. */ +func (h *hashLongestMatchQuickly) HashBytes(data []byte) uint32 { + var hash uint64 = ((binary.LittleEndian.Uint64(data) << (64 - 8*h.hashLen)) * kHashMul64) + + /* The higher bits contain more mixture from the multiplication, + so we take our results from there. */ + return uint32(hash >> (64 - h.bucketBits)) +} + +/* A (forgetful) hash table to the data seen by the compressor, to + help create backward references to previous data. + + This is a hash map of fixed size (1 << 16). Starting from the + given index, 1 buckets are used to store values of a key. */ +type hashLongestMatchQuickly struct { + hasherCommon + + bucketBits uint + bucketSweep int + hashLen uint + useDictionary bool + + buckets []uint32 +} + +func (h *hashLongestMatchQuickly) Initialize(params *encoderParams) { + h.buckets = make([]uint32, 1<> 7 + /* Partial preparation is 100 times slower (per socket). */ + if one_shot && input_size <= partial_prepare_threshold { + var i uint + for i = 0; i < input_size; i++ { + var key uint32 = h.HashBytes(data[i:]) + for j := 0; j < h.bucketSweep; j++ { + h.buckets[key+uint32(j)] = 0 + } + } + } else { + /* It is not strictly necessary to fill this buffer here, but + not filling will make the results of the compression stochastic + (but correct). This is because random data would cause the + system to find accidentally good backward references here and there. */ + for i := range h.buckets { + h.buckets[i] = 0 + } + } +} + +/* Look at 5 bytes at &data[ix & mask]. + Compute a hash from these, and store the value somewhere within + [ix .. ix+3]. */ +func (h *hashLongestMatchQuickly) Store(data []byte, mask uint, ix uint) { + var key uint32 = h.HashBytes(data[ix&mask:]) + var off uint32 = uint32(ix>>3) % uint32(h.bucketSweep) + /* Wiggle the value with the bucket sweep range. */ + h.buckets[key+off] = uint32(ix) +} + +func (h *hashLongestMatchQuickly) StoreRange(data []byte, mask uint, ix_start uint, ix_end uint) { + var i uint + for i = ix_start; i < ix_end; i++ { + h.Store(data, mask, i) + } +} + +func (h *hashLongestMatchQuickly) StitchToPreviousBlock(num_bytes uint, position uint, ringbuffer []byte, ringbuffer_mask uint) { + if num_bytes >= h.HashTypeLength()-1 && position >= 3 { + /* Prepare the hashes for three last bytes of the last write. + These could not be calculated before, since they require knowledge + of both the previous and the current block. */ + h.Store(ringbuffer, ringbuffer_mask, position-3) + h.Store(ringbuffer, ringbuffer_mask, position-2) + h.Store(ringbuffer, ringbuffer_mask, position-1) + } +} + +func (*hashLongestMatchQuickly) PrepareDistanceCache(distance_cache []int) { +} + +/* Find a longest backward match of &data[cur_ix & ring_buffer_mask] + up to the length of max_length and stores the position cur_ix in the + hash table. + + Does not look for matches longer than max_length. + Does not look for matches further away than max_backward. + Writes the best match into |out|. + |out|->score is updated only if a better match is found. */ +func (h *hashLongestMatchQuickly) FindLongestMatch(dictionary *encoderDictionary, data []byte, ring_buffer_mask uint, distance_cache []int, cur_ix uint, max_length uint, max_backward uint, gap uint, max_distance uint, out *hasherSearchResult) { + var best_len_in uint = out.len + var cur_ix_masked uint = cur_ix & ring_buffer_mask + var key uint32 = h.HashBytes(data[cur_ix_masked:]) + var compare_char int = int(data[cur_ix_masked+best_len_in]) + var min_score uint = out.score + var best_score uint = out.score + var best_len uint = best_len_in + var cached_backward uint = uint(distance_cache[0]) + var prev_ix uint = cur_ix - cached_backward + var bucket []uint32 + out.len_code_delta = 0 + if prev_ix < cur_ix { + prev_ix &= uint(uint32(ring_buffer_mask)) + if compare_char == int(data[prev_ix+best_len]) { + var len uint = findMatchLengthWithLimit(data[prev_ix:], data[cur_ix_masked:], max_length) + if len >= 4 { + var score uint = backwardReferenceScoreUsingLastDistance(uint(len)) + if best_score < score { + best_score = score + best_len = uint(len) + out.len = uint(len) + out.distance = cached_backward + out.score = best_score + compare_char = int(data[cur_ix_masked+best_len]) + if h.bucketSweep == 1 { + h.buckets[key] = uint32(cur_ix) + return + } + } + } + } + } + + if h.bucketSweep == 1 { + var backward uint + var len uint + + /* Only one to look for, don't bother to prepare for a loop. */ + prev_ix = uint(h.buckets[key]) + + h.buckets[key] = uint32(cur_ix) + backward = cur_ix - prev_ix + prev_ix &= uint(uint32(ring_buffer_mask)) + if compare_char != int(data[prev_ix+best_len_in]) { + return + } + + if backward == 0 || backward > max_backward { + return + } + + len = findMatchLengthWithLimit(data[prev_ix:], data[cur_ix_masked:], max_length) + if len >= 4 { + var score uint = backwardReferenceScore(uint(len), backward) + if best_score < score { + out.len = uint(len) + out.distance = backward + out.score = score + return + } + } + } else { + bucket = h.buckets[key:] + var i int + prev_ix = uint(bucket[0]) + bucket = bucket[1:] + for i = 0; i < h.bucketSweep; (func() { i++; tmp3 := bucket; bucket = bucket[1:]; prev_ix = uint(tmp3[0]) })() { + var backward uint = cur_ix - prev_ix + var len uint + prev_ix &= uint(uint32(ring_buffer_mask)) + if compare_char != int(data[prev_ix+best_len]) { + continue + } + + if backward == 0 || backward > max_backward { + continue + } + + len = findMatchLengthWithLimit(data[prev_ix:], data[cur_ix_masked:], max_length) + if len >= 4 { + var score uint = backwardReferenceScore(uint(len), backward) + if best_score < score { + best_score = score + best_len = uint(len) + out.len = best_len + out.distance = backward + out.score = score + compare_char = int(data[cur_ix_masked+best_len]) + } + } + } + } + + if h.useDictionary && min_score == out.score { + searchInStaticDictionary(dictionary, h, data[cur_ix_masked:], max_length, max_backward+gap, max_distance, out, true) + } + + h.buckets[key+uint32((cur_ix>>3)%uint(h.bucketSweep))] = uint32(cur_ix) +} diff --git a/backend/vendor/github.com/andybalholm/brotli/hash_rolling.go b/backend/vendor/github.com/andybalholm/brotli/hash_rolling.go new file mode 100644 index 0000000..6630fc0 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/hash_rolling.go @@ -0,0 +1,168 @@ +package brotli + +/* Copyright 2018 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* NOTE: this hasher does not search in the dictionary. It is used as + backup-hasher, the main hasher already searches in it. */ + +const kRollingHashMul32 uint32 = 69069 + +const kInvalidPosHashRolling uint32 = 0xffffffff + +/* This hasher uses a longer forward length, but returning a higher value here + will hurt compression by the main hasher when combined with a composite + hasher. The hasher tests for forward itself instead. */ +func (*hashRolling) HashTypeLength() uint { + return 4 +} + +func (*hashRolling) StoreLookahead() uint { + return 4 +} + +/* Computes a code from a single byte. A lookup table of 256 values could be + used, but simply adding 1 works about as good. */ +func (*hashRolling) HashByte(b byte) uint32 { + return uint32(b) + 1 +} + +func (h *hashRolling) HashRollingFunctionInitial(state uint32, add byte, factor uint32) uint32 { + return uint32(factor*state + h.HashByte(add)) +} + +func (h *hashRolling) HashRollingFunction(state uint32, add byte, rem byte, factor uint32, factor_remove uint32) uint32 { + return uint32(factor*state + h.HashByte(add) - factor_remove*h.HashByte(rem)) +} + +/* Rolling hash for long distance long string matches. Stores one position + per bucket, bucket key is computed over a long region. */ +type hashRolling struct { + hasherCommon + + jump int + + state uint32 + table []uint32 + next_ix uint + factor uint32 + factor_remove uint32 +} + +func (h *hashRolling) Initialize(params *encoderParams) { + h.state = 0 + h.next_ix = 0 + + h.factor = kRollingHashMul32 + + /* Compute the factor of the oldest byte to remove: factor**steps modulo + 0xffffffff (the multiplications rely on 32-bit overflow) */ + h.factor_remove = 1 + + for i := 0; i < 32; i += h.jump { + h.factor_remove *= h.factor + } + + h.table = make([]uint32, 16777216) + for i := 0; i < 16777216; i++ { + h.table[i] = kInvalidPosHashRolling + } +} + +func (h *hashRolling) Prepare(one_shot bool, input_size uint, data []byte) { + /* Too small size, cannot use this hasher. */ + if input_size < 32 { + return + } + h.state = 0 + for i := 0; i < 32; i += h.jump { + h.state = h.HashRollingFunctionInitial(h.state, data[i], h.factor) + } +} + +func (*hashRolling) Store(data []byte, mask uint, ix uint) { +} + +func (*hashRolling) StoreRange(data []byte, mask uint, ix_start uint, ix_end uint) { +} + +func (h *hashRolling) StitchToPreviousBlock(num_bytes uint, position uint, ringbuffer []byte, ring_buffer_mask uint) { + var position_masked uint + /* In this case we must re-initialize the hasher from scratch from the + current position. */ + + var available uint = num_bytes + if position&uint(h.jump-1) != 0 { + var diff uint = uint(h.jump) - (position & uint(h.jump-1)) + if diff > available { + available = 0 + } else { + available = available - diff + } + position += diff + } + + position_masked = position & ring_buffer_mask + + /* wrapping around ringbuffer not handled. */ + if available > ring_buffer_mask-position_masked { + available = ring_buffer_mask - position_masked + } + + h.Prepare(false, available, ringbuffer[position&ring_buffer_mask:]) + h.next_ix = position +} + +func (*hashRolling) PrepareDistanceCache(distance_cache []int) { +} + +func (h *hashRolling) FindLongestMatch(dictionary *encoderDictionary, data []byte, ring_buffer_mask uint, distance_cache []int, cur_ix uint, max_length uint, max_backward uint, gap uint, max_distance uint, out *hasherSearchResult) { + var cur_ix_masked uint = cur_ix & ring_buffer_mask + var pos uint = h.next_ix + + if cur_ix&uint(h.jump-1) != 0 { + return + } + + /* Not enough lookahead */ + if max_length < 32 { + return + } + + for pos = h.next_ix; pos <= cur_ix; pos += uint(h.jump) { + var code uint32 = h.state & ((16777216 * 64) - 1) + var rem byte = data[pos&ring_buffer_mask] + var add byte = data[(pos+32)&ring_buffer_mask] + var found_ix uint = uint(kInvalidPosHashRolling) + + h.state = h.HashRollingFunction(h.state, add, rem, h.factor, h.factor_remove) + + if code < 16777216 { + found_ix = uint(h.table[code]) + h.table[code] = uint32(pos) + if pos == cur_ix && uint32(found_ix) != kInvalidPosHashRolling { + /* The cast to 32-bit makes backward distances up to 4GB work even + if cur_ix is above 4GB, despite using 32-bit values in the table. */ + var backward uint = uint(uint32(cur_ix - found_ix)) + if backward <= max_backward { + var found_ix_masked uint = found_ix & ring_buffer_mask + var len uint = findMatchLengthWithLimit(data[found_ix_masked:], data[cur_ix_masked:], max_length) + if len >= 4 && len > out.len { + var score uint = backwardReferenceScore(uint(len), backward) + if score > out.score { + out.len = uint(len) + out.distance = backward + out.score = score + out.len_code_delta = 0 + } + } + } + } + } + } + + h.next_ix = cur_ix + uint(h.jump) +} diff --git a/backend/vendor/github.com/andybalholm/brotli/histogram.go b/backend/vendor/github.com/andybalholm/brotli/histogram.go new file mode 100644 index 0000000..0346622 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/histogram.go @@ -0,0 +1,226 @@ +package brotli + +import "math" + +/* The distance symbols effectively used by "Large Window Brotli" (32-bit). */ +const numHistogramDistanceSymbols = 544 + +type histogramLiteral struct { + data_ [numLiteralSymbols]uint32 + total_count_ uint + bit_cost_ float64 +} + +func histogramClearLiteral(self *histogramLiteral) { + self.data_ = [numLiteralSymbols]uint32{} + self.total_count_ = 0 + self.bit_cost_ = math.MaxFloat64 +} + +func clearHistogramsLiteral(array []histogramLiteral, length uint) { + var i uint + for i = 0; i < length; i++ { + histogramClearLiteral(&array[i:][0]) + } +} + +func histogramAddLiteral(self *histogramLiteral, val uint) { + self.data_[val]++ + self.total_count_++ +} + +func histogramAddVectorLiteral(self *histogramLiteral, p []byte, n uint) { + self.total_count_ += n + n += 1 + for { + n-- + if n == 0 { + break + } + self.data_[p[0]]++ + p = p[1:] + } +} + +func histogramAddHistogramLiteral(self *histogramLiteral, v *histogramLiteral) { + var i uint + self.total_count_ += v.total_count_ + for i = 0; i < numLiteralSymbols; i++ { + self.data_[i] += v.data_[i] + } +} + +func histogramDataSizeLiteral() uint { + return numLiteralSymbols +} + +type histogramCommand struct { + data_ [numCommandSymbols]uint32 + total_count_ uint + bit_cost_ float64 +} + +func histogramClearCommand(self *histogramCommand) { + self.data_ = [numCommandSymbols]uint32{} + self.total_count_ = 0 + self.bit_cost_ = math.MaxFloat64 +} + +func clearHistogramsCommand(array []histogramCommand, length uint) { + var i uint + for i = 0; i < length; i++ { + histogramClearCommand(&array[i:][0]) + } +} + +func histogramAddCommand(self *histogramCommand, val uint) { + self.data_[val]++ + self.total_count_++ +} + +func histogramAddVectorCommand(self *histogramCommand, p []uint16, n uint) { + self.total_count_ += n + n += 1 + for { + n-- + if n == 0 { + break + } + self.data_[p[0]]++ + p = p[1:] + } +} + +func histogramAddHistogramCommand(self *histogramCommand, v *histogramCommand) { + var i uint + self.total_count_ += v.total_count_ + for i = 0; i < numCommandSymbols; i++ { + self.data_[i] += v.data_[i] + } +} + +func histogramDataSizeCommand() uint { + return numCommandSymbols +} + +type histogramDistance struct { + data_ [numDistanceSymbols]uint32 + total_count_ uint + bit_cost_ float64 +} + +func histogramClearDistance(self *histogramDistance) { + self.data_ = [numDistanceSymbols]uint32{} + self.total_count_ = 0 + self.bit_cost_ = math.MaxFloat64 +} + +func clearHistogramsDistance(array []histogramDistance, length uint) { + var i uint + for i = 0; i < length; i++ { + histogramClearDistance(&array[i:][0]) + } +} + +func histogramAddDistance(self *histogramDistance, val uint) { + self.data_[val]++ + self.total_count_++ +} + +func histogramAddVectorDistance(self *histogramDistance, p []uint16, n uint) { + self.total_count_ += n + n += 1 + for { + n-- + if n == 0 { + break + } + self.data_[p[0]]++ + p = p[1:] + } +} + +func histogramAddHistogramDistance(self *histogramDistance, v *histogramDistance) { + var i uint + self.total_count_ += v.total_count_ + for i = 0; i < numDistanceSymbols; i++ { + self.data_[i] += v.data_[i] + } +} + +func histogramDataSizeDistance() uint { + return numDistanceSymbols +} + +type blockSplitIterator struct { + split_ *blockSplit + idx_ uint + type_ uint + length_ uint +} + +func initBlockSplitIterator(self *blockSplitIterator, split *blockSplit) { + self.split_ = split + self.idx_ = 0 + self.type_ = 0 + if len(split.lengths) > 0 { + self.length_ = uint(split.lengths[0]) + } else { + self.length_ = 0 + } +} + +func blockSplitIteratorNext(self *blockSplitIterator) { + if self.length_ == 0 { + self.idx_++ + self.type_ = uint(self.split_.types[self.idx_]) + self.length_ = uint(self.split_.lengths[self.idx_]) + } + + self.length_-- +} + +func buildHistogramsWithContext(cmds []command, literal_split *blockSplit, insert_and_copy_split *blockSplit, dist_split *blockSplit, ringbuffer []byte, start_pos uint, mask uint, prev_byte byte, prev_byte2 byte, context_modes []int, literal_histograms []histogramLiteral, insert_and_copy_histograms []histogramCommand, copy_dist_histograms []histogramDistance) { + var pos uint = start_pos + var literal_it blockSplitIterator + var insert_and_copy_it blockSplitIterator + var dist_it blockSplitIterator + + initBlockSplitIterator(&literal_it, literal_split) + initBlockSplitIterator(&insert_and_copy_it, insert_and_copy_split) + initBlockSplitIterator(&dist_it, dist_split) + for i := range cmds { + var cmd *command = &cmds[i] + var j uint + blockSplitIteratorNext(&insert_and_copy_it) + histogramAddCommand(&insert_and_copy_histograms[insert_and_copy_it.type_], uint(cmd.cmd_prefix_)) + + /* TODO: unwrap iterator blocks. */ + for j = uint(cmd.insert_len_); j != 0; j-- { + var context uint + blockSplitIteratorNext(&literal_it) + context = literal_it.type_ + if context_modes != nil { + var lut contextLUT = getContextLUT(context_modes[context]) + context = (context << literalContextBits) + uint(getContext(prev_byte, prev_byte2, lut)) + } + + histogramAddLiteral(&literal_histograms[context], uint(ringbuffer[pos&mask])) + prev_byte2 = prev_byte + prev_byte = ringbuffer[pos&mask] + pos++ + } + + pos += uint(commandCopyLen(cmd)) + if commandCopyLen(cmd) != 0 { + prev_byte2 = ringbuffer[(pos-2)&mask] + prev_byte = ringbuffer[(pos-1)&mask] + if cmd.cmd_prefix_ >= 128 { + var context uint + blockSplitIteratorNext(&dist_it) + context = uint(uint32(dist_it.type_< bestQ && + (spec.Value == "*" || spec.Value == offer) { + bestQ = spec.Q + bestOffer = offer + } + } + } + if bestQ == 0 { + bestOffer = "" + } + return bestOffer +} + +// acceptSpec describes an Accept* header. +type acceptSpec struct { + Value string + Q float64 +} + +// parseAccept parses Accept* headers. +func parseAccept(header http.Header, key string) (specs []acceptSpec) { +loop: + for _, s := range header[key] { + for { + var spec acceptSpec + spec.Value, s = expectTokenSlash(s) + if spec.Value == "" { + continue loop + } + spec.Q = 1.0 + s = skipSpace(s) + if strings.HasPrefix(s, ";") { + s = skipSpace(s[1:]) + if !strings.HasPrefix(s, "q=") { + continue loop + } + spec.Q, s = expectQuality(s[2:]) + if spec.Q < 0.0 { + continue loop + } + } + specs = append(specs, spec) + s = skipSpace(s) + if !strings.HasPrefix(s, ",") { + continue loop + } + s = skipSpace(s[1:]) + } + } + return +} + +func skipSpace(s string) (rest string) { + i := 0 + for ; i < len(s); i++ { + if octetTypes[s[i]]&isSpace == 0 { + break + } + } + return s[i:] +} + +func expectTokenSlash(s string) (token, rest string) { + i := 0 + for ; i < len(s); i++ { + b := s[i] + if (octetTypes[b]&isToken == 0) && b != '/' { + break + } + } + return s[:i], s[i:] +} + +func expectQuality(s string) (q float64, rest string) { + switch { + case len(s) == 0: + return -1, "" + case s[0] == '0': + q = 0 + case s[0] == '1': + q = 1 + default: + return -1, "" + } + s = s[1:] + if !strings.HasPrefix(s, ".") { + return q, s + } + s = s[1:] + i := 0 + n := 0 + d := 1 + for ; i < len(s); i++ { + b := s[i] + if b < '0' || b > '9' { + break + } + n = n*10 + int(b) - '0' + d *= 10 + } + return q + float64(n)/float64(d), s[i:] +} + +// Octet types from RFC 2616. +var octetTypes [256]octetType + +type octetType byte + +const ( + isToken octetType = 1 << iota + isSpace +) + +func init() { + // OCTET = + // CHAR = + // CTL = + // CR = + // LF = + // SP = + // HT = + // <"> = + // CRLF = CR LF + // LWS = [CRLF] 1*( SP | HT ) + // TEXT = + // separators = "(" | ")" | "<" | ">" | "@" | "," | ";" | ":" | "\" | <"> + // | "/" | "[" | "]" | "?" | "=" | "{" | "}" | SP | HT + // token = 1* + // qdtext = > + + for c := 0; c < 256; c++ { + var t octetType + isCtl := c <= 31 || c == 127 + isChar := 0 <= c && c <= 127 + isSeparator := strings.ContainsRune(" \t\"(),/:;<=>?@[]\\{}", rune(c)) + if strings.ContainsRune(" \t\r\n", rune(c)) { + t |= isSpace + } + if isChar && !isCtl && !isSeparator { + t |= isToken + } + octetTypes[c] = t + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/huffman.go b/backend/vendor/github.com/andybalholm/brotli/huffman.go new file mode 100644 index 0000000..182f3d2 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/huffman.go @@ -0,0 +1,653 @@ +package brotli + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Utilities for building Huffman decoding tables. */ + +const huffmanMaxCodeLength = 15 + +/* Maximum possible Huffman table size for an alphabet size of (index * 32), + max code length 15 and root table bits 8. */ +var kMaxHuffmanTableSize = []uint16{ + 256, + 402, + 436, + 468, + 500, + 534, + 566, + 598, + 630, + 662, + 694, + 726, + 758, + 790, + 822, + 854, + 886, + 920, + 952, + 984, + 1016, + 1048, + 1080, + 1112, + 1144, + 1176, + 1208, + 1240, + 1272, + 1304, + 1336, + 1368, + 1400, + 1432, + 1464, + 1496, + 1528, +} + +/* BROTLI_NUM_BLOCK_LEN_SYMBOLS == 26 */ +const huffmanMaxSize26 = 396 + +/* BROTLI_MAX_BLOCK_TYPE_SYMBOLS == 258 */ +const huffmanMaxSize258 = 632 + +/* BROTLI_MAX_CONTEXT_MAP_SYMBOLS == 272 */ +const huffmanMaxSize272 = 646 + +const huffmanMaxCodeLengthCodeLength = 5 + +/* Do not create this struct directly - use the ConstructHuffmanCode + * constructor below! */ +type huffmanCode struct { + bits byte + value uint16 +} + +func constructHuffmanCode(bits byte, value uint16) huffmanCode { + var h huffmanCode + h.bits = bits + h.value = value + return h +} + +/* Builds Huffman lookup table assuming code lengths are in symbol order. */ + +/* Builds Huffman lookup table assuming code lengths are in symbol order. + Returns size of resulting table. */ + +/* Builds a simple Huffman table. The |num_symbols| parameter is to be + interpreted as follows: 0 means 1 symbol, 1 means 2 symbols, + 2 means 3 symbols, 3 means 4 symbols with lengths [2, 2, 2, 2], + 4 means 4 symbols with lengths [1, 2, 3, 3]. */ + +/* Contains a collection of Huffman trees with the same alphabet size. */ +/* max_symbol is needed due to simple codes since log2(alphabet_size) could be + greater than log2(max_symbol). */ +type huffmanTreeGroup struct { + htrees [][]huffmanCode + codes []huffmanCode + alphabet_size uint16 + max_symbol uint16 + num_htrees uint16 +} + +const reverseBitsMax = 8 + +const reverseBitsBase = 0 + +var kReverseBits = [1 << reverseBitsMax]byte{ + 0x00, + 0x80, + 0x40, + 0xC0, + 0x20, + 0xA0, + 0x60, + 0xE0, + 0x10, + 0x90, + 0x50, + 0xD0, + 0x30, + 0xB0, + 0x70, + 0xF0, + 0x08, + 0x88, + 0x48, + 0xC8, + 0x28, + 0xA8, + 0x68, + 0xE8, + 0x18, + 0x98, + 0x58, + 0xD8, + 0x38, + 0xB8, + 0x78, + 0xF8, + 0x04, + 0x84, + 0x44, + 0xC4, + 0x24, + 0xA4, + 0x64, + 0xE4, + 0x14, + 0x94, + 0x54, + 0xD4, + 0x34, + 0xB4, + 0x74, + 0xF4, + 0x0C, + 0x8C, + 0x4C, + 0xCC, + 0x2C, + 0xAC, + 0x6C, + 0xEC, + 0x1C, + 0x9C, + 0x5C, + 0xDC, + 0x3C, + 0xBC, + 0x7C, + 0xFC, + 0x02, + 0x82, + 0x42, + 0xC2, + 0x22, + 0xA2, + 0x62, + 0xE2, + 0x12, + 0x92, + 0x52, + 0xD2, + 0x32, + 0xB2, + 0x72, + 0xF2, + 0x0A, + 0x8A, + 0x4A, + 0xCA, + 0x2A, + 0xAA, + 0x6A, + 0xEA, + 0x1A, + 0x9A, + 0x5A, + 0xDA, + 0x3A, + 0xBA, + 0x7A, + 0xFA, + 0x06, + 0x86, + 0x46, + 0xC6, + 0x26, + 0xA6, + 0x66, + 0xE6, + 0x16, + 0x96, + 0x56, + 0xD6, + 0x36, + 0xB6, + 0x76, + 0xF6, + 0x0E, + 0x8E, + 0x4E, + 0xCE, + 0x2E, + 0xAE, + 0x6E, + 0xEE, + 0x1E, + 0x9E, + 0x5E, + 0xDE, + 0x3E, + 0xBE, + 0x7E, + 0xFE, + 0x01, + 0x81, + 0x41, + 0xC1, + 0x21, + 0xA1, + 0x61, + 0xE1, + 0x11, + 0x91, + 0x51, + 0xD1, + 0x31, + 0xB1, + 0x71, + 0xF1, + 0x09, + 0x89, + 0x49, + 0xC9, + 0x29, + 0xA9, + 0x69, + 0xE9, + 0x19, + 0x99, + 0x59, + 0xD9, + 0x39, + 0xB9, + 0x79, + 0xF9, + 0x05, + 0x85, + 0x45, + 0xC5, + 0x25, + 0xA5, + 0x65, + 0xE5, + 0x15, + 0x95, + 0x55, + 0xD5, + 0x35, + 0xB5, + 0x75, + 0xF5, + 0x0D, + 0x8D, + 0x4D, + 0xCD, + 0x2D, + 0xAD, + 0x6D, + 0xED, + 0x1D, + 0x9D, + 0x5D, + 0xDD, + 0x3D, + 0xBD, + 0x7D, + 0xFD, + 0x03, + 0x83, + 0x43, + 0xC3, + 0x23, + 0xA3, + 0x63, + 0xE3, + 0x13, + 0x93, + 0x53, + 0xD3, + 0x33, + 0xB3, + 0x73, + 0xF3, + 0x0B, + 0x8B, + 0x4B, + 0xCB, + 0x2B, + 0xAB, + 0x6B, + 0xEB, + 0x1B, + 0x9B, + 0x5B, + 0xDB, + 0x3B, + 0xBB, + 0x7B, + 0xFB, + 0x07, + 0x87, + 0x47, + 0xC7, + 0x27, + 0xA7, + 0x67, + 0xE7, + 0x17, + 0x97, + 0x57, + 0xD7, + 0x37, + 0xB7, + 0x77, + 0xF7, + 0x0F, + 0x8F, + 0x4F, + 0xCF, + 0x2F, + 0xAF, + 0x6F, + 0xEF, + 0x1F, + 0x9F, + 0x5F, + 0xDF, + 0x3F, + 0xBF, + 0x7F, + 0xFF, +} + +const reverseBitsLowest = (uint64(1) << (reverseBitsMax - 1 + reverseBitsBase)) + +/* Returns reverse(num >> BROTLI_REVERSE_BITS_BASE, BROTLI_REVERSE_BITS_MAX), + where reverse(value, len) is the bit-wise reversal of the len least + significant bits of value. */ +func reverseBits8(num uint64) uint64 { + return uint64(kReverseBits[num]) +} + +/* Stores code in table[0], table[step], table[2*step], ..., table[end] */ +/* Assumes that end is an integer multiple of step */ +func replicateValue(table []huffmanCode, step int, end int, code huffmanCode) { + for { + end -= step + table[end] = code + if end <= 0 { + break + } + } +} + +/* Returns the table width of the next 2nd level table. |count| is the histogram + of bit lengths for the remaining symbols, |len| is the code length of the + next processed symbol. */ +func nextTableBitSize(count []uint16, len int, root_bits int) int { + var left int = 1 << uint(len-root_bits) + for len < huffmanMaxCodeLength { + left -= int(count[len]) + if left <= 0 { + break + } + len++ + left <<= 1 + } + + return len - root_bits +} + +func buildCodeLengthsHuffmanTable(table []huffmanCode, code_lengths []byte, count []uint16) { + var code huffmanCode /* current table entry */ /* symbol index in original or sorted table */ /* prefix code */ /* prefix code addend */ /* step size to replicate values in current table */ /* size of current table */ /* symbols sorted by code length */ + var symbol int + var key uint64 + var key_step uint64 + var step int + var table_size int + var sorted [codeLengthCodes]int + var offset [huffmanMaxCodeLengthCodeLength + 1]int + var bits int + var bits_count int + /* offsets in sorted table for each length */ + assert(huffmanMaxCodeLengthCodeLength <= reverseBitsMax) + + /* Generate offsets into sorted symbol table by code length. */ + symbol = -1 + + bits = 1 + var i int + for i = 0; i < huffmanMaxCodeLengthCodeLength; i++ { + symbol += int(count[bits]) + offset[bits] = symbol + bits++ + } + + /* Symbols with code length 0 are placed after all other symbols. */ + offset[0] = codeLengthCodes - 1 + + /* Sort symbols by length, by symbol order within each length. */ + symbol = codeLengthCodes + + for { + var i int + for i = 0; i < 6; i++ { + symbol-- + sorted[offset[code_lengths[symbol]]] = symbol + offset[code_lengths[symbol]]-- + } + if symbol == 0 { + break + } + } + + table_size = 1 << huffmanMaxCodeLengthCodeLength + + /* Special case: all symbols but one have 0 code length. */ + if offset[0] == 0 { + code = constructHuffmanCode(0, uint16(sorted[0])) + for key = 0; key < uint64(table_size); key++ { + table[key] = code + } + + return + } + + /* Fill in table. */ + key = 0 + + key_step = reverseBitsLowest + symbol = 0 + bits = 1 + step = 2 + for { + for bits_count = int(count[bits]); bits_count != 0; bits_count-- { + code = constructHuffmanCode(byte(bits), uint16(sorted[symbol])) + symbol++ + replicateValue(table[reverseBits8(key):], step, table_size, code) + key += key_step + } + + step <<= 1 + key_step >>= 1 + bits++ + if bits > huffmanMaxCodeLengthCodeLength { + break + } + } +} + +func buildHuffmanTable(root_table []huffmanCode, root_bits int, symbol_lists symbolList, count []uint16) uint32 { + var code huffmanCode /* current table entry */ /* next available space in table */ /* current code length */ /* symbol index in original or sorted table */ /* prefix code */ /* prefix code addend */ /* 2nd level table prefix code */ /* 2nd level table prefix code addend */ /* step size to replicate values in current table */ /* key length of current table */ /* size of current table */ /* sum of root table size and 2nd level table sizes */ + var table []huffmanCode + var len int + var symbol int + var key uint64 + var key_step uint64 + var sub_key uint64 + var sub_key_step uint64 + var step int + var table_bits int + var table_size int + var total_size int + var max_length int = -1 + var bits int + var bits_count int + + assert(root_bits <= reverseBitsMax) + assert(huffmanMaxCodeLength-root_bits <= reverseBitsMax) + + for symbolListGet(symbol_lists, max_length) == 0xFFFF { + max_length-- + } + max_length += huffmanMaxCodeLength + 1 + + table = root_table + table_bits = root_bits + table_size = 1 << uint(table_bits) + total_size = table_size + + /* Fill in the root table. Reduce the table size to if possible, + and create the repetitions by memcpy. */ + if table_bits > max_length { + table_bits = max_length + table_size = 1 << uint(table_bits) + } + + key = 0 + key_step = reverseBitsLowest + bits = 1 + step = 2 + for { + symbol = bits - (huffmanMaxCodeLength + 1) + for bits_count = int(count[bits]); bits_count != 0; bits_count-- { + symbol = int(symbolListGet(symbol_lists, symbol)) + code = constructHuffmanCode(byte(bits), uint16(symbol)) + replicateValue(table[reverseBits8(key):], step, table_size, code) + key += key_step + } + + step <<= 1 + key_step >>= 1 + bits++ + if bits > table_bits { + break + } + } + + /* If root_bits != table_bits then replicate to fill the remaining slots. */ + for total_size != table_size { + copy(table[table_size:], table[:uint(table_size)]) + table_size <<= 1 + } + + /* Fill in 2nd level tables and add pointers to root table. */ + key_step = reverseBitsLowest >> uint(root_bits-1) + + sub_key = reverseBitsLowest << 1 + sub_key_step = reverseBitsLowest + len = root_bits + 1 + step = 2 + for ; len <= max_length; len++ { + symbol = len - (huffmanMaxCodeLength + 1) + for ; count[len] != 0; count[len]-- { + if sub_key == reverseBitsLowest<<1 { + table = table[table_size:] + table_bits = nextTableBitSize(count, int(len), root_bits) + table_size = 1 << uint(table_bits) + total_size += table_size + sub_key = reverseBits8(key) + key += key_step + root_table[sub_key] = constructHuffmanCode(byte(table_bits+root_bits), uint16(uint64(uint(-cap(table)+cap(root_table)))-sub_key)) + sub_key = 0 + } + + symbol = int(symbolListGet(symbol_lists, symbol)) + code = constructHuffmanCode(byte(len-root_bits), uint16(symbol)) + replicateValue(table[reverseBits8(sub_key):], step, table_size, code) + sub_key += sub_key_step + } + + step <<= 1 + sub_key_step >>= 1 + } + + return uint32(total_size) +} + +func buildSimpleHuffmanTable(table []huffmanCode, root_bits int, val []uint16, num_symbols uint32) uint32 { + var table_size uint32 = 1 + var goal_size uint32 = 1 << uint(root_bits) + switch num_symbols { + case 0: + table[0] = constructHuffmanCode(0, val[0]) + + case 1: + if val[1] > val[0] { + table[0] = constructHuffmanCode(1, val[0]) + table[1] = constructHuffmanCode(1, val[1]) + } else { + table[0] = constructHuffmanCode(1, val[1]) + table[1] = constructHuffmanCode(1, val[0]) + } + + table_size = 2 + + case 2: + table[0] = constructHuffmanCode(1, val[0]) + table[2] = constructHuffmanCode(1, val[0]) + if val[2] > val[1] { + table[1] = constructHuffmanCode(2, val[1]) + table[3] = constructHuffmanCode(2, val[2]) + } else { + table[1] = constructHuffmanCode(2, val[2]) + table[3] = constructHuffmanCode(2, val[1]) + } + + table_size = 4 + + case 3: + var i int + var k int + for i = 0; i < 3; i++ { + for k = i + 1; k < 4; k++ { + if val[k] < val[i] { + var t uint16 = val[k] + val[k] = val[i] + val[i] = t + } + } + } + + table[0] = constructHuffmanCode(2, val[0]) + table[2] = constructHuffmanCode(2, val[1]) + table[1] = constructHuffmanCode(2, val[2]) + table[3] = constructHuffmanCode(2, val[3]) + table_size = 4 + + case 4: + if val[3] < val[2] { + var t uint16 = val[3] + val[3] = val[2] + val[2] = t + } + + table[0] = constructHuffmanCode(1, val[0]) + table[1] = constructHuffmanCode(2, val[1]) + table[2] = constructHuffmanCode(1, val[0]) + table[3] = constructHuffmanCode(3, val[2]) + table[4] = constructHuffmanCode(1, val[0]) + table[5] = constructHuffmanCode(2, val[1]) + table[6] = constructHuffmanCode(1, val[0]) + table[7] = constructHuffmanCode(3, val[3]) + table_size = 8 + } + + for table_size != goal_size { + copy(table[table_size:], table[:uint(table_size)]) + table_size <<= 1 + } + + return goal_size +} diff --git a/backend/vendor/github.com/andybalholm/brotli/literal_cost.go b/backend/vendor/github.com/andybalholm/brotli/literal_cost.go new file mode 100644 index 0000000..5a9ace9 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/literal_cost.go @@ -0,0 +1,182 @@ +package brotli + +func utf8Position(last uint, c uint, clamp uint) uint { + if c < 128 { + return 0 /* Next one is the 'Byte 1' again. */ + } else if c >= 192 { /* Next one is the 'Byte 2' of utf-8 encoding. */ + return brotli_min_size_t(1, clamp) + } else { + /* Let's decide over the last byte if this ends the sequence. */ + if last < 0xE0 { + return 0 /* Completed two or three byte coding. */ /* Next one is the 'Byte 3' of utf-8 encoding. */ + } else { + return brotli_min_size_t(2, clamp) + } + } +} + +func decideMultiByteStatsLevel(pos uint, len uint, mask uint, data []byte) uint { + var counts = [3]uint{0} /* should be 2, but 1 compresses better. */ + var max_utf8 uint = 1 + var last_c uint = 0 + var i uint + for i = 0; i < len; i++ { + var c uint = uint(data[(pos+i)&mask]) + counts[utf8Position(last_c, c, 2)]++ + last_c = c + } + + if counts[2] < 500 { + max_utf8 = 1 + } + + if counts[1]+counts[2] < 25 { + max_utf8 = 0 + } + + return max_utf8 +} + +func estimateBitCostsForLiteralsUTF8(pos uint, len uint, mask uint, data []byte, cost []float32) { + var max_utf8 uint = decideMultiByteStatsLevel(pos, uint(len), mask, data) + /* Bootstrap histograms. */ + var histogram = [3][256]uint{[256]uint{0}} + var window_half uint = 495 + var in_window uint = brotli_min_size_t(window_half, uint(len)) + var in_window_utf8 = [3]uint{0} + /* max_utf8 is 0 (normal ASCII single byte modeling), + 1 (for 2-byte UTF-8 modeling), or 2 (for 3-byte UTF-8 modeling). */ + + var i uint + { + var last_c uint = 0 + var utf8_pos uint = 0 + for i = 0; i < in_window; i++ { + var c uint = uint(data[(pos+i)&mask]) + histogram[utf8_pos][c]++ + in_window_utf8[utf8_pos]++ + utf8_pos = utf8Position(last_c, c, max_utf8) + last_c = c + } + } + + /* Compute bit costs with sliding window. */ + for i = 0; i < len; i++ { + if i >= window_half { + var c uint + var last_c uint + if i < window_half+1 { + c = 0 + } else { + c = uint(data[(pos+i-window_half-1)&mask]) + } + if i < window_half+2 { + last_c = 0 + } else { + last_c = uint(data[(pos+i-window_half-2)&mask]) + } + /* Remove a byte in the past. */ + + var utf8_pos2 uint = utf8Position(last_c, c, max_utf8) + histogram[utf8_pos2][data[(pos+i-window_half)&mask]]-- + in_window_utf8[utf8_pos2]-- + } + + if i+window_half < len { + var c uint = uint(data[(pos+i+window_half-1)&mask]) + var last_c uint = uint(data[(pos+i+window_half-2)&mask]) + /* Add a byte in the future. */ + + var utf8_pos2 uint = utf8Position(last_c, c, max_utf8) + histogram[utf8_pos2][data[(pos+i+window_half)&mask]]++ + in_window_utf8[utf8_pos2]++ + } + { + var c uint + var last_c uint + if i < 1 { + c = 0 + } else { + c = uint(data[(pos+i-1)&mask]) + } + if i < 2 { + last_c = 0 + } else { + last_c = uint(data[(pos+i-2)&mask]) + } + var utf8_pos uint = utf8Position(last_c, c, max_utf8) + var masked_pos uint = (pos + i) & mask + var histo uint = histogram[utf8_pos][data[masked_pos]] + var lit_cost float64 + if histo == 0 { + histo = 1 + } + + lit_cost = fastLog2(in_window_utf8[utf8_pos]) - fastLog2(histo) + lit_cost += 0.02905 + if lit_cost < 1.0 { + lit_cost *= 0.5 + lit_cost += 0.5 + } + + /* Make the first bytes more expensive -- seems to help, not sure why. + Perhaps because the entropy source is changing its properties + rapidly in the beginning of the file, perhaps because the beginning + of the data is a statistical "anomaly". */ + if i < 2000 { + lit_cost += 0.7 - (float64(2000-i) / 2000.0 * 0.35) + } + + cost[i] = float32(lit_cost) + } + } +} + +func estimateBitCostsForLiterals(pos uint, len uint, mask uint, data []byte, cost []float32) { + if isMostlyUTF8(data, pos, mask, uint(len), kMinUTF8Ratio) { + estimateBitCostsForLiteralsUTF8(pos, uint(len), mask, data, cost) + return + } else { + var histogram = [256]uint{0} + var window_half uint = 2000 + var in_window uint = brotli_min_size_t(window_half, uint(len)) + var i uint + /* Bootstrap histogram. */ + for i = 0; i < in_window; i++ { + histogram[data[(pos+i)&mask]]++ + } + + /* Compute bit costs with sliding window. */ + for i = 0; i < len; i++ { + var histo uint + if i >= window_half { + /* Remove a byte in the past. */ + histogram[data[(pos+i-window_half)&mask]]-- + + in_window-- + } + + if i+window_half < len { + /* Add a byte in the future. */ + histogram[data[(pos+i+window_half)&mask]]++ + + in_window++ + } + + histo = histogram[data[(pos+i)&mask]] + if histo == 0 { + histo = 1 + } + { + var lit_cost float64 = fastLog2(in_window) - fastLog2(histo) + lit_cost += 0.029 + if lit_cost < 1.0 { + lit_cost *= 0.5 + lit_cost += 0.5 + } + + cost[i] = float32(lit_cost) + } + } + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/matchfinder/emitter.go b/backend/vendor/github.com/andybalholm/brotli/matchfinder/emitter.go new file mode 100644 index 0000000..507d1ca --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/matchfinder/emitter.go @@ -0,0 +1,34 @@ +package matchfinder + +// An absoluteMatch is like a Match, but it stores indexes into the byte +// stream instead of lengths. +type absoluteMatch struct { + // Start is the index of the first byte. + Start int + + // End is the index of the byte after the last byte + // (so that End - Start = Length). + End int + + // Match is the index of the previous data that matches + // (Start - Match = Distance). + Match int +} + +// A matchEmitter manages the output of matches for a MatchFinder. +type matchEmitter struct { + // Dst is the destination slice that Matches are added to. + Dst []Match + + // NextEmit is the index of the next byte to emit. + NextEmit int +} + +func (e *matchEmitter) emit(m absoluteMatch) { + e.Dst = append(e.Dst, Match{ + Unmatched: m.Start - e.NextEmit, + Length: m.End - m.Start, + Distance: m.Start - m.Match, + }) + e.NextEmit = m.End +} diff --git a/backend/vendor/github.com/andybalholm/brotli/matchfinder/m0.go b/backend/vendor/github.com/andybalholm/brotli/matchfinder/m0.go new file mode 100644 index 0000000..773b7c4 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/matchfinder/m0.go @@ -0,0 +1,169 @@ +package matchfinder + +import ( + "encoding/binary" +) + +// M0 is an implementation of the MatchFinder interface based +// on the algorithm used by snappy, but modified to be more like the algorithm +// used by compression level 0 of the brotli reference implementation. +// +// It has a maximum block size of 65536 bytes. +type M0 struct { + // Lazy turns on "lazy matching," for higher compression but less speed. + Lazy bool + + MaxDistance int + MaxLength int +} + +func (M0) Reset() {} + +const ( + m0HashLen = 5 + + m0TableBits = 14 + m0TableSize = 1 << m0TableBits + m0Shift = 32 - m0TableBits + // m0TableMask is redundant, but helps the compiler eliminate bounds + // checks. + m0TableMask = m0TableSize - 1 +) + +func (m M0) hash(data uint64) uint64 { + hash := (data << (64 - 8*m0HashLen)) * hashMul64 + return hash >> (64 - m0TableBits) +} + +// FindMatches looks for matches in src, appends them to dst, and returns dst. +// src must not be longer than 65536 bytes. +func (m M0) FindMatches(dst []Match, src []byte) []Match { + const inputMargin = 16 - 1 + const minNonLiteralBlockSize = 1 + 1 + inputMargin + + if len(src) < minNonLiteralBlockSize { + dst = append(dst, Match{ + Unmatched: len(src), + }) + return dst + } + if len(src) > 65536 { + panic("block too long") + } + + var table [m0TableSize]uint16 + + // sLimit is when to stop looking for offset/length copies. The inputMargin + // lets us use a fast path for emitLiteral in the main loop, while we are + // looking for copies. + sLimit := len(src) - inputMargin + + // nextEmit is where in src the next emitLiteral should start from. + nextEmit := 0 + + // The encoded form must start with a literal, as there are no previous + // bytes to copy, so we start looking for hash matches at s == 1. + s := 1 + nextHash := m.hash(binary.LittleEndian.Uint64(src[s:])) + + for { + // Copied from the C++ snappy implementation: + // + // Heuristic match skipping: If 32 bytes are scanned with no matches + // found, start looking only at every other byte. If 32 more bytes are + // scanned (or skipped), look at every third byte, etc.. When a match + // is found, immediately go back to looking at every byte. This is a + // small loss (~5% performance, ~0.1% density) for compressible data + // due to more bookkeeping, but for non-compressible data (such as + // JPEG) it's a huge win since the compressor quickly "realizes" the + // data is incompressible and doesn't bother looking for matches + // everywhere. + // + // The "skip" variable keeps track of how many bytes there are since + // the last match; dividing it by 32 (ie. right-shifting by five) gives + // the number of bytes to move ahead for each iteration. + skip := 32 + + nextS := s + candidate := 0 + for { + s = nextS + bytesBetweenHashLookups := skip >> 5 + nextS = s + bytesBetweenHashLookups + skip += bytesBetweenHashLookups + if nextS > sLimit { + goto emitRemainder + } + candidate = int(table[nextHash&m0TableMask]) + table[nextHash&m0TableMask] = uint16(s) + nextHash = m.hash(binary.LittleEndian.Uint64(src[nextS:])) + if m.MaxDistance != 0 && s-candidate > m.MaxDistance { + continue + } + if binary.LittleEndian.Uint32(src[s:]) == binary.LittleEndian.Uint32(src[candidate:]) { + break + } + } + + // Invariant: we have a 4-byte match at s. + base := s + s = extendMatch(src, candidate+4, s+4) + + origBase := base + if m.Lazy && base+1 < sLimit { + newBase := base + 1 + h := m.hash(binary.LittleEndian.Uint64(src[newBase:])) + newCandidate := int(table[h&m0TableMask]) + table[h&m0TableMask] = uint16(newBase) + okDistance := true + if m.MaxDistance != 0 && newBase-newCandidate > m.MaxDistance { + okDistance = false + } + if okDistance && binary.LittleEndian.Uint32(src[newBase:]) == binary.LittleEndian.Uint32(src[newCandidate:]) { + newS := extendMatch(src, newCandidate+4, newBase+4) + if newS-newBase > s-base+1 { + s = newS + base = newBase + candidate = newCandidate + } + } + } + + if m.MaxLength != 0 && s-base > m.MaxLength { + s = base + m.MaxLength + } + dst = append(dst, Match{ + Unmatched: base - nextEmit, + Length: s - base, + Distance: base - candidate, + }) + nextEmit = s + if s >= sLimit { + goto emitRemainder + } + + if m.Lazy { + // If lazy matching is enabled, we update the hash table for + // every byte in the match. + for i := origBase + 2; i < s-1; i++ { + x := binary.LittleEndian.Uint64(src[i:]) + table[m.hash(x)&m0TableMask] = uint16(i) + } + } + + // We could immediately start working at s now, but to improve + // compression we first update the hash table at s-1 and at s. + x := binary.LittleEndian.Uint64(src[s-1:]) + prevHash := m.hash(x >> 0) + table[prevHash&m0TableMask] = uint16(s - 1) + nextHash = m.hash(x >> 8) + } + +emitRemainder: + if nextEmit < len(src) { + dst = append(dst, Match{ + Unmatched: len(src) - nextEmit, + }) + } + return dst +} diff --git a/backend/vendor/github.com/andybalholm/brotli/matchfinder/m4.go b/backend/vendor/github.com/andybalholm/brotli/matchfinder/m4.go new file mode 100644 index 0000000..f556a01 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/matchfinder/m4.go @@ -0,0 +1,338 @@ +package matchfinder + +import ( + "bytes" + "encoding/binary" + "math/bits" + "runtime" +) + +// M4 is an implementation of the MatchFinder +// interface that uses a hash table to find matches, +// optional match chains, +// and the advanced parsing technique from +// https://fastcompression.blogspot.com/2011/12/advanced-parsing-strategies.html. +type M4 struct { + // MaxDistance is the maximum distance (in bytes) to look back for + // a match. The default is 65535. + MaxDistance int + + // MinLength is the length of the shortest match to return. + // The default is 4. + MinLength int + + // HashLen is the number of bytes to use to calculate the hashes. + // The maximum is 8 and the default is 6. + HashLen int + + // TableBits is the number of bits in the hash table indexes. + // The default is 17 (128K entries). + TableBits int + + // ChainLength is how many entries to search on the "match chain" of older + // locations with the same hash as the current location. + ChainLength int + + // DistanceBitCost is used when comparing two matches to see + // which is better. The comparison is primarily based on the length + // of the matches, but it can also take the distance into account, + // in terms of the number of bits needed to represent the distance. + // One byte of length is given a score of 256, so 32 (256/8) would + // be a reasonable first guess for the value of one bit. + // (The default is 0, which bases the comparison solely on length.) + DistanceBitCost int + + table []uint32 + chain []uint32 + + history []byte +} + +func (q *M4) Reset() { + for i := range q.table { + q.table[i] = 0 + } + q.history = q.history[:0] + q.chain = q.chain[:0] +} + +func (q *M4) score(m absoluteMatch) int { + return (m.End-m.Start)*256 + (bits.LeadingZeros32(uint32(m.Start-m.Match))-32)*q.DistanceBitCost +} + +func (q *M4) FindMatches(dst []Match, src []byte) []Match { + if q.MaxDistance == 0 { + q.MaxDistance = 65535 + } + if q.MinLength == 0 { + q.MinLength = 4 + } + if q.HashLen == 0 { + q.HashLen = 6 + } + if q.TableBits == 0 { + q.TableBits = 17 + } + if len(q.table) < 1< q.MaxDistance*2 { + // Trim down the history buffer. + delta := len(q.history) - q.MaxDistance + copy(q.history, q.history[delta:]) + q.history = q.history[:q.MaxDistance] + if q.ChainLength > 0 { + q.chain = q.chain[:q.MaxDistance] + } + + for i, v := range q.table { + newV := int(v) - delta + if newV < 0 { + newV = 0 + } + q.table[i] = uint32(newV) + } + } + + // Append src to the history buffer. + e.NextEmit = len(q.history) + q.history = append(q.history, src...) + if q.ChainLength > 0 { + q.chain = append(q.chain, make([]uint32, len(src))...) + } + src = q.history + + // matches stores the matches that have been found but not emitted, + // in reverse order. (matches[0] is the most recent one.) + var matches [3]absoluteMatch + for i := e.NextEmit; i < len(src)-7; i++ { + if matches[0] != (absoluteMatch{}) && i >= matches[0].End { + // We have found some matches, and we're far enough along that we probably + // won't find overlapping matches, so we might as well emit them. + if matches[1] != (absoluteMatch{}) { + if matches[1].End > matches[0].Start { + matches[1].End = matches[0].Start + } + if matches[1].End-matches[1].Start >= q.MinLength && q.score(matches[1]) > 0 { + e.emit(matches[1]) + } + } + e.emit(matches[0]) + matches = [3]absoluteMatch{} + } + + // Look for a repeat match one byte after the current position. + if matches[0] == (absoluteMatch{}) && len(e.Dst) > 0 { + prevDistance := e.Dst[len(e.Dst)-1].Distance + if binary.LittleEndian.Uint32(src[i+1:]) == binary.LittleEndian.Uint32(src[i+1-prevDistance:]) { + // We have a 4-byte match. + m := extendMatch2(src, i+1, i+1-prevDistance, e.NextEmit+1) + if m.End-m.Start >= q.MinLength { + matches[0] = m + } + } + } + + // Calculate and store the hash. + h := ((binary.LittleEndian.Uint64(src[i:]) & (1<<(8*q.HashLen) - 1)) * hashMul64) >> (64 - q.TableBits) + candidate := int(q.table[h]) + q.table[h] = uint32(i) + if q.ChainLength > 0 && candidate != 0 { + delta := i - candidate + q.chain[i] = uint32(delta) + } + + if i < matches[0].End && i != matches[0].End+2-q.HashLen { + continue + } + if candidate == 0 || i-candidate > q.MaxDistance { + continue + } + + // Look for a match. + var currentMatch absoluteMatch + + if binary.LittleEndian.Uint32(src[candidate:]) == binary.LittleEndian.Uint32(src[i:]) { + m := extendMatch2(src, i, candidate, e.NextEmit) + if m.End-m.Start > q.MinLength && q.score(m) > 0 { + currentMatch = m + } + } + + for j := 0; j < q.ChainLength; j++ { + delta := q.chain[candidate] + if delta == 0 { + break + } + candidate -= int(delta) + if candidate <= 0 || i-candidate > q.MaxDistance { + break + } + if binary.LittleEndian.Uint32(src[candidate:]) == binary.LittleEndian.Uint32(src[i:]) { + m := extendMatch2(src, i, candidate, e.NextEmit) + if m.End-m.Start > q.MinLength && q.score(m) > q.score(currentMatch) { + currentMatch = m + } + } + } + + if currentMatch.End-currentMatch.Start < q.MinLength { + continue + } + + overlapPenalty := 0 + if matches[0] != (absoluteMatch{}) { + overlapPenalty = 275 + if currentMatch.Start <= matches[1].End { + // This match would completely replace the previous match, + // so there is no penalty for overlap. + overlapPenalty = 0 + } + } + + if q.score(currentMatch) <= q.score(matches[0])+overlapPenalty { + continue + } + + matches = [3]absoluteMatch{ + currentMatch, + matches[0], + matches[1], + } + + if matches[2] == (absoluteMatch{}) { + continue + } + + // We have three matches, so it's time to emit one and/or eliminate one. + switch { + case matches[0].Start < matches[2].End: + // The first and third matches overlap; discard the one in between. + matches = [3]absoluteMatch{ + matches[0], + matches[2], + absoluteMatch{}, + } + + case matches[0].Start < matches[2].End+q.MinLength: + // The first and third matches don't overlap, but there's no room for + // another match between them. Emit the first match and discard the second. + e.emit(matches[2]) + matches = [3]absoluteMatch{ + matches[0], + absoluteMatch{}, + absoluteMatch{}, + } + + default: + // Emit the first match, shortening it if necessary to avoid overlap with the second. + if matches[2].End > matches[1].Start { + matches[2].End = matches[1].Start + if q.ChainLength > 0 && matches[2].End-matches[2].Start >= q.MinLength { + // Since the match length was trimmed, we may be able to find a closer match + // to replace it. + pos := matches[2].Start + for { + delta := int(q.chain[pos]) + if delta == 0 { + break + } + pos -= delta + if pos <= matches[2].Match { + break + } + if bytes.Equal(src[matches[2].Start:matches[2].End], src[pos:pos+matches[2].End-matches[2].Start]) { + matches[2].Match = pos + break + } + } + } + } + if matches[2].End-matches[2].Start >= q.MinLength && q.score(matches[2]) > 0 { + e.emit(matches[2]) + } + matches[2] = absoluteMatch{} + } + } + + // We've found all the matches now; emit the remaining ones. + if matches[1] != (absoluteMatch{}) { + if matches[1].End > matches[0].Start { + matches[1].End = matches[0].Start + } + if matches[1].End-matches[1].Start >= q.MinLength && q.score(matches[1]) > 0 { + e.emit(matches[1]) + } + } + if matches[0] != (absoluteMatch{}) { + e.emit(matches[0]) + } + + dst = e.Dst + if e.NextEmit < len(src) { + dst = append(dst, Match{ + Unmatched: len(src) - e.NextEmit, + }) + } + + return dst +} + +const hashMul64 = 0x1E35A7BD1E35A7BD + +// extendMatch returns the largest k such that k <= len(src) and that +// src[i:i+k-j] and src[j:k] have the same contents. +// +// It assumes that: +// +// 0 <= i && i < j && j <= len(src) +func extendMatch(src []byte, i, j int) int { + switch runtime.GOARCH { + case "amd64", "arm64": + // As long as we are 8 or more bytes before the end of src, we can load and + // compare 8 bytes at a time. If those 8 bytes are equal, repeat. + for j+8 < len(src) { + iBytes := binary.LittleEndian.Uint64(src[i:]) + jBytes := binary.LittleEndian.Uint64(src[j:]) + if iBytes != jBytes { + // If those 8 bytes were not equal, XOR the two 8 byte values, and return + // the index of the first byte that differs. The BSF instruction finds the + // least significant 1 bit, the amd64 architecture is little-endian, and + // the shift by 3 converts a bit index to a byte index. + return j + bits.TrailingZeros64(iBytes^jBytes)>>3 + } + i, j = i+8, j+8 + } + case "386": + // On a 32-bit CPU, we do it 4 bytes at a time. + for j+4 < len(src) { + iBytes := binary.LittleEndian.Uint32(src[i:]) + jBytes := binary.LittleEndian.Uint32(src[j:]) + if iBytes != jBytes { + return j + bits.TrailingZeros32(iBytes^jBytes)>>3 + } + i, j = i+4, j+4 + } + } + for ; j < len(src) && src[i] == src[j]; i, j = i+1, j+1 { + } + return j +} + +// Given a 4-byte match at src[start] and src[candidate], extendMatch2 extends it +// upward as far as possible, and downward no farther than to min. +func extendMatch2(src []byte, start, candidate, min int) absoluteMatch { + end := extendMatch(src, candidate+4, start+4) + for start > min && candidate > 0 && src[start-1] == src[candidate-1] { + start-- + candidate-- + } + return absoluteMatch{ + Start: start, + End: end, + Match: candidate, + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/matchfinder/matchfinder.go b/backend/vendor/github.com/andybalholm/brotli/matchfinder/matchfinder.go new file mode 100644 index 0000000..f6bcfdb --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/matchfinder/matchfinder.go @@ -0,0 +1,103 @@ +// The matchfinder package defines reusable components for data compression. +// +// Many compression libraries have two main parts: +// - Something that looks for repeated sequences of bytes +// - An encoder for the compressed data format (often an entropy coder) +// +// Although these are logically two separate steps, the implementations are +// usually closely tied together. You can't use flate's matcher with snappy's +// encoder, for example. This package defines interfaces and an intermediate +// representation to allow mixing and matching compression components. +package matchfinder + +import "io" + +// A Match is the basic unit of LZ77 compression. +type Match struct { + Unmatched int // the number of unmatched bytes since the previous match + Length int // the number of bytes in the matched string; it may be 0 at the end of the input + Distance int // how far back in the stream to copy from +} + +// A MatchFinder performs the LZ77 stage of compression, looking for matches. +type MatchFinder interface { + // FindMatches looks for matches in src, appends them to dst, and returns dst. + FindMatches(dst []Match, src []byte) []Match + + // Reset clears any internal state, preparing the MatchFinder to be used with + // a new stream. + Reset() +} + +// An Encoder encodes the data in its final format. +type Encoder interface { + // Encode appends the encoded format of src to dst, using the match + // information from matches. + Encode(dst []byte, src []byte, matches []Match, lastBlock bool) []byte + + // Reset clears any internal state, preparing the Encoder to be used with + // a new stream. + Reset() +} + +// A Writer uses MatchFinder and Encoder to write compressed data to Dest. +type Writer struct { + Dest io.Writer + MatchFinder MatchFinder + Encoder Encoder + + // BlockSize is the number of bytes to compress at a time. If it is zero, + // each Write operation will be treated as one block. + BlockSize int + + err error + inBuf []byte + outBuf []byte + matches []Match +} + +func (w *Writer) Write(p []byte) (n int, err error) { + if w.err != nil { + return 0, w.err + } + + if w.BlockSize == 0 { + return w.writeBlock(p, false) + } + + w.inBuf = append(w.inBuf, p...) + var pos int + for pos = 0; pos+w.BlockSize <= len(w.inBuf) && w.err == nil; pos += w.BlockSize { + w.writeBlock(w.inBuf[pos:pos+w.BlockSize], false) + } + if pos > 0 { + n := copy(w.inBuf, w.inBuf[pos:]) + w.inBuf = w.inBuf[:n] + } + + return len(p), w.err +} + +func (w *Writer) writeBlock(p []byte, lastBlock bool) (n int, err error) { + w.outBuf = w.outBuf[:0] + w.matches = w.MatchFinder.FindMatches(w.matches[:0], p) + w.outBuf = w.Encoder.Encode(w.outBuf, p, w.matches, lastBlock) + _, w.err = w.Dest.Write(w.outBuf) + return len(p), w.err +} + +func (w *Writer) Close() error { + w.writeBlock(w.inBuf, true) + w.inBuf = w.inBuf[:0] + return w.err +} + +func (w *Writer) Reset(newDest io.Writer) { + w.MatchFinder.Reset() + w.Encoder.Reset() + w.err = nil + w.inBuf = w.inBuf[:0] + w.outBuf = w.outBuf[:0] + w.matches = w.matches[:0] + w.Dest = newDest +} diff --git a/backend/vendor/github.com/andybalholm/brotli/matchfinder/pathfinder.go b/backend/vendor/github.com/andybalholm/brotli/matchfinder/pathfinder.go new file mode 100644 index 0000000..2a12ab9 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/matchfinder/pathfinder.go @@ -0,0 +1,328 @@ +package matchfinder + +import ( + "encoding/binary" + "math" + "math/bits" + "slices" +) + +// Pathfinder is a MatchFinder that uses hash chains to find matches, and a +// shortest-path optimizer to choose which matches to use. +type Pathfinder struct { + // MaxDistance is the maximum distance (in bytes) to look back for + // a match. The default is 65535. + MaxDistance int + + // MinLength is the length of the shortest match to return. + // The default is 4. + MinLength int + + // HashLen is the number of bytes to use to calculate the hashes. + // The maximum is 8 and the default is 6. + HashLen int + + // TableBits is the number of bits in the hash table indexes. + // The default is 17 (128K entries). + TableBits int + + // ChainLength is how many entries to search on the "match chain" of older + // locations with the same hash as the current location. + ChainLength int + + table []uint32 + chain []uint32 + + history []byte + + // holding onto buffers to reduce allocations: + + arrivals []arrival + foundMatches []absoluteMatch + matches []Match +} + +func (q *Pathfinder) Reset() { + for i := range q.table { + q.table[i] = 0 + } + q.history = q.history[:0] + q.chain = q.chain[:0] +} + +// An arrival represents how we got to a certain byte position. +// The cost is the total cost to get there from the beginning of the block. +// If distance > 0, the arrival is with a match. +// If distance == 0, the arrival is with a run of literals. +type arrival struct { + length uint32 + distance uint32 + cost float32 +} + +const ( + baseMatchCost float32 = 4 +) + +func (q *Pathfinder) FindMatches(dst []Match, src []byte) []Match { + if q.MaxDistance == 0 { + q.MaxDistance = 65535 + } + if q.MinLength == 0 { + q.MinLength = 4 + } + if q.HashLen == 0 { + q.HashLen = 6 + } + if q.TableBits == 0 { + q.TableBits = 17 + } + if len(q.table) < 1< q.MaxDistance*2 { + // Trim down the history buffer. + delta := len(q.history) - q.MaxDistance + copy(q.history, q.history[delta:]) + q.history = q.history[:q.MaxDistance] + q.chain = q.chain[:q.MaxDistance] + + for i, v := range q.table { + newV := max(int(v)-delta, 0) + q.table[i] = uint32(newV) + } + } + + // Append src to the history buffer. + historyLen := len(q.history) + q.history = append(q.history, src...) + q.chain = append(q.chain, make([]uint32, len(src))...) + src = q.history + + // Calculate hashes and build the chain. + for i := historyLen; i < len(src)-7; i++ { + h := ((binary.LittleEndian.Uint64(src[i:]) & (1<<(8*q.HashLen) - 1)) * hashMul64) >> (64 - q.TableBits) + candidate := int(q.table[h]) + q.table[h] = uint32(i) + if candidate != 0 { + delta := i - candidate + q.chain[i] = uint32(delta) + } + } + + // Look for matches, and collect them in foundMatches. Later we'll figure out + // which ones to actually use. + foundMatches := q.foundMatches[:0] + var prevMatch absoluteMatch + i := historyLen + for i < len(src)-7 { + delta := q.chain[i] + if delta == 0 { + i++ + continue + } + candidate := i - int(delta) + if candidate <= 0 || i-candidate > q.MaxDistance { + i++ + continue + } + + var currentMatch absoluteMatch + + if i >= prevMatch.End && prevMatch != (absoluteMatch{}) { + // Look for a repeat match at i+1. + prevDistance := prevMatch.Start - prevMatch.Match + if binary.LittleEndian.Uint32(src[i+1:]) == binary.LittleEndian.Uint32(src[i+1-prevDistance:]) { + m := extendMatch2(src, i+1, i+1-prevDistance, i+1) + if m.End-m.Start > q.MinLength { + currentMatch = m + foundMatches = append(foundMatches, m) + } + } + } + + if binary.LittleEndian.Uint32(src[candidate:]) == binary.LittleEndian.Uint32(src[i:]) { + m := extendMatch2(src, i, candidate, max(historyLen, prevMatch.Start)) + if m.End-m.Start > q.MinLength { + currentMatch = m + foundMatches = append(foundMatches, m) + } + } + + for range q.ChainLength { + delta := q.chain[candidate] + if delta == 0 { + break + } + candidate -= int(delta) + if candidate <= 0 || i-candidate > q.MaxDistance { + break + } + if binary.LittleEndian.Uint32(src[candidate:]) == binary.LittleEndian.Uint32(src[i:]) { + m := extendMatch2(src, i, candidate, max(historyLen, prevMatch.Start)) + if m.End-m.Start > q.MinLength && m.End-m.Start > currentMatch.End-currentMatch.Start { + currentMatch = m + foundMatches = append(foundMatches, m) + } + } + } + + if i < prevMatch.End && currentMatch.End-currentMatch.Start <= prevMatch.End-prevMatch.Start { + // We were looking for an overlapping match, but we didn't find one longer + // than the previous match. So we'll go back to sequential search, + // starting right after the previous match. + i = prevMatch.End + continue + } + + if currentMatch == (absoluteMatch{}) { + // No match found. Continue with sequential search. + i++ + continue + } + + // We've found a match; now look for matches overlapping the end of it. + prevMatch = currentMatch + i = currentMatch.End + 2 - q.HashLen + } + + q.foundMatches = foundMatches + + slices.SortFunc(foundMatches, func(a, b absoluteMatch) int { return a.Start - b.Start }) + matchIndex := 0 + var pending absoluteMatch + + for i := historyLen; i < len(src); i++ { + var arrivedHere arrival + if i > historyLen { + arrivedHere = arrivals[i-historyLen-1] + } + + unmatched := 0 + if arrivedHere.distance == 0 { + unmatched = int(arrivedHere.length) + } + prevDistance := 0 + if i-unmatched > historyLen { + prevDistance = int(arrivals[i-historyLen-1-unmatched].distance) + } + + literalCost := byteCost[src[i]] + nextArrival := &arrivals[i-historyLen] + if nextArrival.cost == 0 || arrivedHere.cost+literalCost < nextArrival.cost { + *nextArrival = arrival{ + cost: arrivedHere.cost + literalCost, + length: uint32(unmatched + 1), + } + } + + for matchIndex < len(foundMatches) && foundMatches[matchIndex].Start == i { + m := foundMatches[matchIndex] + matchIndex++ + if m.End > pending.End { + pending = m + } + matchCost := baseMatchCost + float32(bits.Len(uint(unmatched))) + if m.Start-m.Match != prevDistance { + matchCost += float32(bits.Len(uint(m.Start - m.Match))) + } + for j := m.Start + q.MinLength; j <= m.End; j++ { + adjustedCost := matchCost + if j-m.Start < 6 { + // Matches shorter than 6 are comparatively rare, and therefore + // have longer codes. + adjustedCost += float32(6-(j-m.Start)) * 2 + } + a := &arrivals[j-historyLen-1] + if a.cost == 0 || arrivedHere.cost+adjustedCost < a.cost { + *a = arrival{ + length: uint32(j - m.Start), + distance: uint32(m.Start - m.Match), + cost: arrivedHere.cost + adjustedCost, + } + } + } + } + + // If a match from an earlier position extends far enough past the current + // position, try using the tail of it, starting from here. + if unmatched == 0 && pending.Start != i && pending.End >= i+q.MinLength && + !(arrivedHere.length != 0 && arrivedHere.distance == uint32(pending.Start-pending.Match)) { + matchCost := baseMatchCost + float32(bits.Len(uint(pending.Start-pending.Match))) + for j := i + q.MinLength; j <= pending.End; j++ { + adjustedCost := matchCost + if j-i < 6 { + // Matches shorter than 6 are comparatively rare, and therefore + // have longer codes. + adjustedCost += float32(6-(j-i)) * 2 + } + a := &arrivals[j-historyLen-1] + if a.cost == 0 || arrivedHere.cost+adjustedCost < a.cost { + *a = arrival{ + length: uint32(j - i), + distance: uint32(pending.Start - pending.Match), + cost: arrivedHere.cost + adjustedCost, + } + } + } + } + + delta := q.chain[i] + if delta == 0 { + continue + } + candidate := i - int(delta) + if candidate <= 0 || i-candidate > q.MaxDistance { + continue + } + } + + // We've found the shortest path; now walk it backward and store the matches. + matches := q.matches[:0] + i = len(arrivals) - 1 + for i >= 0 { + a := arrivals[i] + if a.distance > 0 { + matches = append(matches, Match{ + Length: int(a.length), + Distance: int(a.distance), + }) + i -= int(a.length) + } else { + if len(matches) == 0 { + matches = append(matches, Match{}) + } + matches[len(matches)-1].Unmatched = int(a.length) + i -= int(a.length) + } + } + q.matches = matches + + slices.Reverse(matches) + + return append(dst, matches...) +} diff --git a/backend/vendor/github.com/andybalholm/brotli/matchfinder/textencoder.go b/backend/vendor/github.com/andybalholm/brotli/matchfinder/textencoder.go new file mode 100644 index 0000000..75ecc59 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/matchfinder/textencoder.go @@ -0,0 +1,53 @@ +package matchfinder + +import "fmt" + +// A TextEncoder is an Encoder that produces a human-readable representation of +// the LZ77 compression. Matches are replaced with symbols. +type TextEncoder struct{} + +func (t TextEncoder) Reset() {} + +func (t TextEncoder) Encode(dst []byte, src []byte, matches []Match, lastBlock bool) []byte { + pos := 0 + for _, m := range matches { + if m.Unmatched > 0 { + dst = append(dst, src[pos:pos+m.Unmatched]...) + pos += m.Unmatched + } + if m.Length > 0 { + dst = append(dst, []byte(fmt.Sprintf("<%d,%d>", m.Length, m.Distance))...) + pos += m.Length + } + } + if pos < len(src) { + dst = append(dst, src[pos:]...) + } + return dst +} + +// A NoMatchFinder implements MatchFinder, but doesn't find any matches. +// It can be used to implement the equivalent of the standard library flate package's +// HuffmanOnly setting. +type NoMatchFinder struct{} + +func (n NoMatchFinder) Reset() {} + +func (n NoMatchFinder) FindMatches(dst []Match, src []byte) []Match { + return append(dst, Match{ + Unmatched: len(src), + }) +} + +// AutoReset wraps a MatchFinder that can return references to data in previous +// blocks, and calls Reset before each block. It is useful for (e.g.) using a +// snappy Encoder with a MatchFinder designed for flate. (Snappy doesn't +// support references between blocks.) +type AutoReset struct { + MatchFinder +} + +func (a AutoReset) FindMatches(dst []Match, src []byte) []Match { + a.Reset() + return a.MatchFinder.FindMatches(dst, src) +} diff --git a/backend/vendor/github.com/andybalholm/brotli/memory.go b/backend/vendor/github.com/andybalholm/brotli/memory.go new file mode 100644 index 0000000..a07c705 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/memory.go @@ -0,0 +1,66 @@ +package brotli + +/* Copyright 2016 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* +Dynamically grows array capacity to at least the requested size +T: data type +A: array +C: capacity +R: requested size +*/ +func brotli_ensure_capacity_uint8_t(a *[]byte, c *uint, r uint) { + if *c < r { + var new_size uint = *c + if new_size == 0 { + new_size = r + } + + for new_size < r { + new_size *= 2 + } + + if cap(*a) < int(new_size) { + var new_array []byte = make([]byte, new_size) + if *c != 0 { + copy(new_array, (*a)[:*c]) + } + + *a = new_array + } else { + *a = (*a)[:new_size] + } + + *c = new_size + } +} + +func brotli_ensure_capacity_uint32_t(a *[]uint32, c *uint, r uint) { + var new_array []uint32 + if *c < r { + var new_size uint = *c + if new_size == 0 { + new_size = r + } + + for new_size < r { + new_size *= 2 + } + + if cap(*a) < int(new_size) { + new_array = make([]uint32, new_size) + if *c != 0 { + copy(new_array, (*a)[:*c]) + } + + *a = new_array + } else { + *a = (*a)[:new_size] + } + *c = new_size + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/metablock.go b/backend/vendor/github.com/andybalholm/brotli/metablock.go new file mode 100644 index 0000000..3014df8 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/metablock.go @@ -0,0 +1,574 @@ +package brotli + +import ( + "sync" +) + +/* Copyright 2014 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Algorithms for distributing the literals and commands of a metablock between + block types and contexts. */ + +type metaBlockSplit struct { + literal_split blockSplit + command_split blockSplit + distance_split blockSplit + literal_context_map []uint32 + literal_context_map_size uint + distance_context_map []uint32 + distance_context_map_size uint + literal_histograms []histogramLiteral + literal_histograms_size uint + command_histograms []histogramCommand + command_histograms_size uint + distance_histograms []histogramDistance + distance_histograms_size uint +} + +var metaBlockPool sync.Pool + +func getMetaBlockSplit() *metaBlockSplit { + mb, _ := metaBlockPool.Get().(*metaBlockSplit) + + if mb == nil { + mb = &metaBlockSplit{} + } else { + initBlockSplit(&mb.literal_split) + initBlockSplit(&mb.command_split) + initBlockSplit(&mb.distance_split) + mb.literal_context_map = mb.literal_context_map[:0] + mb.literal_context_map_size = 0 + mb.distance_context_map = mb.distance_context_map[:0] + mb.distance_context_map_size = 0 + mb.literal_histograms = mb.literal_histograms[:0] + mb.command_histograms = mb.command_histograms[:0] + mb.distance_histograms = mb.distance_histograms[:0] + } + return mb +} + +func freeMetaBlockSplit(mb *metaBlockSplit) { + metaBlockPool.Put(mb) +} + +func initDistanceParams(params *encoderParams, npostfix uint32, ndirect uint32) { + var dist_params *distanceParams = ¶ms.dist + var alphabet_size uint32 + var max_distance uint32 + + dist_params.distance_postfix_bits = npostfix + dist_params.num_direct_distance_codes = ndirect + + alphabet_size = uint32(distanceAlphabetSize(uint(npostfix), uint(ndirect), maxDistanceBits)) + max_distance = ndirect + (1 << (maxDistanceBits + npostfix + 2)) - (1 << (npostfix + 2)) + + if params.large_window { + var bound = [maxNpostfix + 1]uint32{0, 4, 12, 28} + var postfix uint32 = 1 << npostfix + alphabet_size = uint32(distanceAlphabetSize(uint(npostfix), uint(ndirect), largeMaxDistanceBits)) + + /* The maximum distance is set so that no distance symbol used can encode + a distance larger than BROTLI_MAX_ALLOWED_DISTANCE with all + its extra bits set. */ + if ndirect < bound[npostfix] { + max_distance = maxAllowedDistance - (bound[npostfix] - ndirect) + } else if ndirect >= bound[npostfix]+postfix { + max_distance = (3 << 29) - 4 + (ndirect - bound[npostfix]) + } else { + max_distance = maxAllowedDistance + } + } + + dist_params.alphabet_size = alphabet_size + dist_params.max_distance = uint(max_distance) +} + +func recomputeDistancePrefixes(cmds []command, orig_params *distanceParams, new_params *distanceParams) { + if orig_params.distance_postfix_bits == new_params.distance_postfix_bits && orig_params.num_direct_distance_codes == new_params.num_direct_distance_codes { + return + } + + for i := range cmds { + var cmd *command = &cmds[i] + if commandCopyLen(cmd) != 0 && cmd.cmd_prefix_ >= 128 { + prefixEncodeCopyDistance(uint(commandRestoreDistanceCode(cmd, orig_params)), uint(new_params.num_direct_distance_codes), uint(new_params.distance_postfix_bits), &cmd.dist_prefix_, &cmd.dist_extra_) + } + } +} + +func computeDistanceCost(cmds []command, orig_params *distanceParams, new_params *distanceParams, cost *float64) bool { + var equal_params bool = false + var dist_prefix uint16 + var dist_extra uint32 + var extra_bits float64 = 0.0 + var histo histogramDistance + histogramClearDistance(&histo) + + if orig_params.distance_postfix_bits == new_params.distance_postfix_bits && orig_params.num_direct_distance_codes == new_params.num_direct_distance_codes { + equal_params = true + } + + for i := range cmds { + cmd := &cmds[i] + if commandCopyLen(cmd) != 0 && cmd.cmd_prefix_ >= 128 { + if equal_params { + dist_prefix = cmd.dist_prefix_ + } else { + var distance uint32 = commandRestoreDistanceCode(cmd, orig_params) + if distance > uint32(new_params.max_distance) { + return false + } + + prefixEncodeCopyDistance(uint(distance), uint(new_params.num_direct_distance_codes), uint(new_params.distance_postfix_bits), &dist_prefix, &dist_extra) + } + + histogramAddDistance(&histo, uint(dist_prefix)&0x3FF) + extra_bits += float64(dist_prefix >> 10) + } + } + + *cost = populationCostDistance(&histo) + extra_bits + return true +} + +var buildMetaBlock_kMaxNumberOfHistograms uint = 256 + +func buildMetaBlock(ringbuffer []byte, pos uint, mask uint, params *encoderParams, prev_byte byte, prev_byte2 byte, cmds []command, literal_context_mode int, mb *metaBlockSplit) { + var distance_histograms []histogramDistance + var literal_histograms []histogramLiteral + var literal_context_modes []int = nil + var literal_histograms_size uint + var distance_histograms_size uint + var i uint + var literal_context_multiplier uint = 1 + var npostfix uint32 + var ndirect_msb uint32 = 0 + var check_orig bool = true + var best_dist_cost float64 = 1e99 + var orig_params encoderParams = *params + /* Histogram ids need to fit in one byte. */ + + var new_params encoderParams = *params + + for npostfix = 0; npostfix <= maxNpostfix; npostfix++ { + for ; ndirect_msb < 16; ndirect_msb++ { + var ndirect uint32 = ndirect_msb << npostfix + var skip bool + var dist_cost float64 + initDistanceParams(&new_params, npostfix, ndirect) + if npostfix == orig_params.dist.distance_postfix_bits && ndirect == orig_params.dist.num_direct_distance_codes { + check_orig = false + } + + skip = !computeDistanceCost(cmds, &orig_params.dist, &new_params.dist, &dist_cost) + if skip || (dist_cost > best_dist_cost) { + break + } + + best_dist_cost = dist_cost + params.dist = new_params.dist + } + + if ndirect_msb > 0 { + ndirect_msb-- + } + ndirect_msb /= 2 + } + + if check_orig { + var dist_cost float64 + computeDistanceCost(cmds, &orig_params.dist, &orig_params.dist, &dist_cost) + if dist_cost < best_dist_cost { + /* NB: currently unused; uncomment when more param tuning is added. */ + /* best_dist_cost = dist_cost; */ + params.dist = orig_params.dist + } + } + + recomputeDistancePrefixes(cmds, &orig_params.dist, ¶ms.dist) + + splitBlock(cmds, ringbuffer, pos, mask, params, &mb.literal_split, &mb.command_split, &mb.distance_split) + + if !params.disable_literal_context_modeling { + literal_context_multiplier = 1 << literalContextBits + literal_context_modes = make([]int, (mb.literal_split.num_types)) + for i = 0; i < mb.literal_split.num_types; i++ { + literal_context_modes[i] = literal_context_mode + } + } + + literal_histograms_size = mb.literal_split.num_types * literal_context_multiplier + literal_histograms = make([]histogramLiteral, literal_histograms_size) + clearHistogramsLiteral(literal_histograms, literal_histograms_size) + + distance_histograms_size = mb.distance_split.num_types << distanceContextBits + distance_histograms = make([]histogramDistance, distance_histograms_size) + clearHistogramsDistance(distance_histograms, distance_histograms_size) + + mb.command_histograms_size = mb.command_split.num_types + if cap(mb.command_histograms) < int(mb.command_histograms_size) { + mb.command_histograms = make([]histogramCommand, (mb.command_histograms_size)) + } else { + mb.command_histograms = mb.command_histograms[:mb.command_histograms_size] + } + clearHistogramsCommand(mb.command_histograms, mb.command_histograms_size) + + buildHistogramsWithContext(cmds, &mb.literal_split, &mb.command_split, &mb.distance_split, ringbuffer, pos, mask, prev_byte, prev_byte2, literal_context_modes, literal_histograms, mb.command_histograms, distance_histograms) + literal_context_modes = nil + + mb.literal_context_map_size = mb.literal_split.num_types << literalContextBits + if cap(mb.literal_context_map) < int(mb.literal_context_map_size) { + mb.literal_context_map = make([]uint32, (mb.literal_context_map_size)) + } else { + mb.literal_context_map = mb.literal_context_map[:mb.literal_context_map_size] + } + + mb.literal_histograms_size = mb.literal_context_map_size + if cap(mb.literal_histograms) < int(mb.literal_histograms_size) { + mb.literal_histograms = make([]histogramLiteral, (mb.literal_histograms_size)) + } else { + mb.literal_histograms = mb.literal_histograms[:mb.literal_histograms_size] + } + + clusterHistogramsLiteral(literal_histograms, literal_histograms_size, buildMetaBlock_kMaxNumberOfHistograms, mb.literal_histograms, &mb.literal_histograms_size, mb.literal_context_map) + literal_histograms = nil + + if params.disable_literal_context_modeling { + /* Distribute assignment to all contexts. */ + for i = mb.literal_split.num_types; i != 0; { + var j uint = 0 + i-- + for ; j < 1< 0 { + var entropy [maxStaticContexts]float64 + var combined_histo []histogramLiteral = make([]histogramLiteral, (2 * num_contexts)) + var combined_entropy [2 * maxStaticContexts]float64 + var diff = [2]float64{0.0} + /* Try merging the set of histograms for the current block type with the + respective set of histograms for the last and second last block types. + Decide over the split based on the total reduction of entropy across + all contexts. */ + + var i uint + for i = 0; i < num_contexts; i++ { + var curr_histo_ix uint = self.curr_histogram_ix_ + i + var j uint + entropy[i] = bitsEntropy(histograms[curr_histo_ix].data_[:], self.alphabet_size_) + for j = 0; j < 2; j++ { + var jx uint = j*num_contexts + i + var last_histogram_ix uint = self.last_histogram_ix_[j] + i + combined_histo[jx] = histograms[curr_histo_ix] + histogramAddHistogramLiteral(&combined_histo[jx], &histograms[last_histogram_ix]) + combined_entropy[jx] = bitsEntropy(combined_histo[jx].data_[0:], self.alphabet_size_) + diff[j] += combined_entropy[jx] - entropy[i] - last_entropy[jx] + } + } + + if split.num_types < self.max_block_types_ && diff[0] > self.split_threshold_ && diff[1] > self.split_threshold_ { + /* Create new block. */ + split.lengths[self.num_blocks_] = uint32(self.block_size_) + + split.types[self.num_blocks_] = byte(split.num_types) + self.last_histogram_ix_[1] = self.last_histogram_ix_[0] + self.last_histogram_ix_[0] = split.num_types * num_contexts + for i = 0; i < num_contexts; i++ { + last_entropy[num_contexts+i] = last_entropy[i] + last_entropy[i] = entropy[i] + } + + self.num_blocks_++ + split.num_types++ + self.curr_histogram_ix_ += num_contexts + if self.curr_histogram_ix_ < *self.histograms_size_ { + clearHistogramsLiteral(self.histograms_[self.curr_histogram_ix_:], self.num_contexts_) + } + + self.block_size_ = 0 + self.merge_last_count_ = 0 + self.target_block_size_ = self.min_block_size_ + } else if diff[1] < diff[0]-20.0 { + split.lengths[self.num_blocks_] = uint32(self.block_size_) + split.types[self.num_blocks_] = split.types[self.num_blocks_-2] + /* Combine this block with second last block. */ + + var tmp uint = self.last_histogram_ix_[0] + self.last_histogram_ix_[0] = self.last_histogram_ix_[1] + self.last_histogram_ix_[1] = tmp + for i = 0; i < num_contexts; i++ { + histograms[self.last_histogram_ix_[0]+i] = combined_histo[num_contexts+i] + last_entropy[num_contexts+i] = last_entropy[i] + last_entropy[i] = combined_entropy[num_contexts+i] + histogramClearLiteral(&histograms[self.curr_histogram_ix_+i]) + } + + self.num_blocks_++ + self.block_size_ = 0 + self.merge_last_count_ = 0 + self.target_block_size_ = self.min_block_size_ + } else { + /* Combine this block with last block. */ + split.lengths[self.num_blocks_-1] += uint32(self.block_size_) + + for i = 0; i < num_contexts; i++ { + histograms[self.last_histogram_ix_[0]+i] = combined_histo[i] + last_entropy[i] = combined_entropy[i] + if split.num_types == 1 { + last_entropy[num_contexts+i] = last_entropy[i] + } + + histogramClearLiteral(&histograms[self.curr_histogram_ix_+i]) + } + + self.block_size_ = 0 + self.merge_last_count_++ + if self.merge_last_count_ > 1 { + self.target_block_size_ += self.min_block_size_ + } + } + + combined_histo = nil + } + + if is_final { + *self.histograms_size_ = split.num_types * num_contexts + split.num_blocks = self.num_blocks_ + } +} + +/* Adds the next symbol to the current block type and context. When the + current block reaches the target size, decides on merging the block. */ +func contextBlockSplitterAddSymbol(self *contextBlockSplitter, symbol uint, context uint) { + histogramAddLiteral(&self.histograms_[self.curr_histogram_ix_+context], symbol) + self.block_size_++ + if self.block_size_ == self.target_block_size_ { + contextBlockSplitterFinishBlock(self, false) /* is_final = */ + } +} + +func mapStaticContexts(num_contexts uint, static_context_map []uint32, mb *metaBlockSplit) { + var i uint + mb.literal_context_map_size = mb.literal_split.num_types << literalContextBits + if cap(mb.literal_context_map) < int(mb.literal_context_map_size) { + mb.literal_context_map = make([]uint32, (mb.literal_context_map_size)) + } else { + mb.literal_context_map = mb.literal_context_map[:mb.literal_context_map_size] + } + + for i = 0; i < mb.literal_split.num_types; i++ { + var offset uint32 = uint32(i * num_contexts) + var j uint + for j = 0; j < 1<= 128 { + blockSplitterAddSymbolDistance(&dist_blocks, uint(cmd.dist_prefix_)&0x3FF) + } + } + } + + if num_contexts == 1 { + blockSplitterFinishBlockLiteral(&lit_blocks.plain, true) /* is_final = */ + } else { + contextBlockSplitterFinishBlock(&lit_blocks.ctx, true) /* is_final = */ + } + + blockSplitterFinishBlockCommand(&cmd_blocks, true) /* is_final = */ + blockSplitterFinishBlockDistance(&dist_blocks, true) /* is_final = */ + + if num_contexts > 1 { + mapStaticContexts(num_contexts, static_context_map, mb) + } +} + +func buildMetaBlockGreedy(ringbuffer []byte, pos uint, mask uint, prev_byte byte, prev_byte2 byte, literal_context_lut contextLUT, num_contexts uint, static_context_map []uint32, commands []command, mb *metaBlockSplit) { + if num_contexts == 1 { + buildMetaBlockGreedyInternal(ringbuffer, pos, mask, prev_byte, prev_byte2, literal_context_lut, 1, nil, commands, mb) + } else { + buildMetaBlockGreedyInternal(ringbuffer, pos, mask, prev_byte, prev_byte2, literal_context_lut, num_contexts, static_context_map, commands, mb) + } +} + +func optimizeHistograms(num_distance_codes uint32, mb *metaBlockSplit) { + var good_for_rle [numCommandSymbols]byte + var i uint + for i = 0; i < mb.literal_histograms_size; i++ { + optimizeHuffmanCountsForRLE(256, mb.literal_histograms[i].data_[:], good_for_rle[:]) + } + + for i = 0; i < mb.command_histograms_size; i++ { + optimizeHuffmanCountsForRLE(numCommandSymbols, mb.command_histograms[i].data_[:], good_for_rle[:]) + } + + for i = 0; i < mb.distance_histograms_size; i++ { + optimizeHuffmanCountsForRLE(uint(num_distance_codes), mb.distance_histograms[i].data_[:], good_for_rle[:]) + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/metablock_command.go b/backend/vendor/github.com/andybalholm/brotli/metablock_command.go new file mode 100644 index 0000000..14c7b77 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/metablock_command.go @@ -0,0 +1,165 @@ +package brotli + +/* Copyright 2015 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Greedy block splitter for one block category (literal, command or distance). + */ +type blockSplitterCommand struct { + alphabet_size_ uint + min_block_size_ uint + split_threshold_ float64 + num_blocks_ uint + split_ *blockSplit + histograms_ []histogramCommand + histograms_size_ *uint + target_block_size_ uint + block_size_ uint + curr_histogram_ix_ uint + last_histogram_ix_ [2]uint + last_entropy_ [2]float64 + merge_last_count_ uint +} + +func initBlockSplitterCommand(self *blockSplitterCommand, alphabet_size uint, min_block_size uint, split_threshold float64, num_symbols uint, split *blockSplit, histograms *[]histogramCommand, histograms_size *uint) { + var max_num_blocks uint = num_symbols/min_block_size + 1 + var max_num_types uint = brotli_min_size_t(max_num_blocks, maxNumberOfBlockTypes+1) + /* We have to allocate one more histogram than the maximum number of block + types for the current histogram when the meta-block is too big. */ + self.alphabet_size_ = alphabet_size + + self.min_block_size_ = min_block_size + self.split_threshold_ = split_threshold + self.num_blocks_ = 0 + self.split_ = split + self.histograms_size_ = histograms_size + self.target_block_size_ = min_block_size + self.block_size_ = 0 + self.curr_histogram_ix_ = 0 + self.merge_last_count_ = 0 + brotli_ensure_capacity_uint8_t(&split.types, &split.types_alloc_size, max_num_blocks) + brotli_ensure_capacity_uint32_t(&split.lengths, &split.lengths_alloc_size, max_num_blocks) + self.split_.num_blocks = max_num_blocks + *histograms_size = max_num_types + if histograms == nil || cap(*histograms) < int(*histograms_size) { + *histograms = make([]histogramCommand, (*histograms_size)) + } else { + *histograms = (*histograms)[:*histograms_size] + } + self.histograms_ = *histograms + + /* Clear only current histogram. */ + histogramClearCommand(&self.histograms_[0]) + + self.last_histogram_ix_[1] = 0 + self.last_histogram_ix_[0] = self.last_histogram_ix_[1] +} + +/* Does either of three things: + (1) emits the current block with a new block type; + (2) emits the current block with the type of the second last block; + (3) merges the current block with the last block. */ +func blockSplitterFinishBlockCommand(self *blockSplitterCommand, is_final bool) { + var split *blockSplit = self.split_ + var last_entropy []float64 = self.last_entropy_[:] + var histograms []histogramCommand = self.histograms_ + self.block_size_ = brotli_max_size_t(self.block_size_, self.min_block_size_) + if self.num_blocks_ == 0 { + /* Create first block. */ + split.lengths[0] = uint32(self.block_size_) + + split.types[0] = 0 + last_entropy[0] = bitsEntropy(histograms[0].data_[:], self.alphabet_size_) + last_entropy[1] = last_entropy[0] + self.num_blocks_++ + split.num_types++ + self.curr_histogram_ix_++ + if self.curr_histogram_ix_ < *self.histograms_size_ { + histogramClearCommand(&histograms[self.curr_histogram_ix_]) + } + self.block_size_ = 0 + } else if self.block_size_ > 0 { + var entropy float64 = bitsEntropy(histograms[self.curr_histogram_ix_].data_[:], self.alphabet_size_) + var combined_histo [2]histogramCommand + var combined_entropy [2]float64 + var diff [2]float64 + var j uint + for j = 0; j < 2; j++ { + var last_histogram_ix uint = self.last_histogram_ix_[j] + combined_histo[j] = histograms[self.curr_histogram_ix_] + histogramAddHistogramCommand(&combined_histo[j], &histograms[last_histogram_ix]) + combined_entropy[j] = bitsEntropy(combined_histo[j].data_[0:], self.alphabet_size_) + diff[j] = combined_entropy[j] - entropy - last_entropy[j] + } + + if split.num_types < maxNumberOfBlockTypes && diff[0] > self.split_threshold_ && diff[1] > self.split_threshold_ { + /* Create new block. */ + split.lengths[self.num_blocks_] = uint32(self.block_size_) + + split.types[self.num_blocks_] = byte(split.num_types) + self.last_histogram_ix_[1] = self.last_histogram_ix_[0] + self.last_histogram_ix_[0] = uint(byte(split.num_types)) + last_entropy[1] = last_entropy[0] + last_entropy[0] = entropy + self.num_blocks_++ + split.num_types++ + self.curr_histogram_ix_++ + if self.curr_histogram_ix_ < *self.histograms_size_ { + histogramClearCommand(&histograms[self.curr_histogram_ix_]) + } + self.block_size_ = 0 + self.merge_last_count_ = 0 + self.target_block_size_ = self.min_block_size_ + } else if diff[1] < diff[0]-20.0 { + split.lengths[self.num_blocks_] = uint32(self.block_size_) + split.types[self.num_blocks_] = split.types[self.num_blocks_-2] + /* Combine this block with second last block. */ + + var tmp uint = self.last_histogram_ix_[0] + self.last_histogram_ix_[0] = self.last_histogram_ix_[1] + self.last_histogram_ix_[1] = tmp + histograms[self.last_histogram_ix_[0]] = combined_histo[1] + last_entropy[1] = last_entropy[0] + last_entropy[0] = combined_entropy[1] + self.num_blocks_++ + self.block_size_ = 0 + histogramClearCommand(&histograms[self.curr_histogram_ix_]) + self.merge_last_count_ = 0 + self.target_block_size_ = self.min_block_size_ + } else { + /* Combine this block with last block. */ + split.lengths[self.num_blocks_-1] += uint32(self.block_size_) + + histograms[self.last_histogram_ix_[0]] = combined_histo[0] + last_entropy[0] = combined_entropy[0] + if split.num_types == 1 { + last_entropy[1] = last_entropy[0] + } + + self.block_size_ = 0 + histogramClearCommand(&histograms[self.curr_histogram_ix_]) + self.merge_last_count_++ + if self.merge_last_count_ > 1 { + self.target_block_size_ += self.min_block_size_ + } + } + } + + if is_final { + *self.histograms_size_ = split.num_types + split.num_blocks = self.num_blocks_ + } +} + +/* Adds the next symbol to the current histogram. When the current histogram + reaches the target size, decides on merging the block. */ +func blockSplitterAddSymbolCommand(self *blockSplitterCommand, symbol uint) { + histogramAddCommand(&self.histograms_[self.curr_histogram_ix_], symbol) + self.block_size_++ + if self.block_size_ == self.target_block_size_ { + blockSplitterFinishBlockCommand(self, false) /* is_final = */ + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/metablock_distance.go b/backend/vendor/github.com/andybalholm/brotli/metablock_distance.go new file mode 100644 index 0000000..5110a81 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/metablock_distance.go @@ -0,0 +1,165 @@ +package brotli + +/* Copyright 2015 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Greedy block splitter for one block category (literal, command or distance). + */ +type blockSplitterDistance struct { + alphabet_size_ uint + min_block_size_ uint + split_threshold_ float64 + num_blocks_ uint + split_ *blockSplit + histograms_ []histogramDistance + histograms_size_ *uint + target_block_size_ uint + block_size_ uint + curr_histogram_ix_ uint + last_histogram_ix_ [2]uint + last_entropy_ [2]float64 + merge_last_count_ uint +} + +func initBlockSplitterDistance(self *blockSplitterDistance, alphabet_size uint, min_block_size uint, split_threshold float64, num_symbols uint, split *blockSplit, histograms *[]histogramDistance, histograms_size *uint) { + var max_num_blocks uint = num_symbols/min_block_size + 1 + var max_num_types uint = brotli_min_size_t(max_num_blocks, maxNumberOfBlockTypes+1) + /* We have to allocate one more histogram than the maximum number of block + types for the current histogram when the meta-block is too big. */ + self.alphabet_size_ = alphabet_size + + self.min_block_size_ = min_block_size + self.split_threshold_ = split_threshold + self.num_blocks_ = 0 + self.split_ = split + self.histograms_size_ = histograms_size + self.target_block_size_ = min_block_size + self.block_size_ = 0 + self.curr_histogram_ix_ = 0 + self.merge_last_count_ = 0 + brotli_ensure_capacity_uint8_t(&split.types, &split.types_alloc_size, max_num_blocks) + brotli_ensure_capacity_uint32_t(&split.lengths, &split.lengths_alloc_size, max_num_blocks) + self.split_.num_blocks = max_num_blocks + *histograms_size = max_num_types + if histograms == nil || cap(*histograms) < int(*histograms_size) { + *histograms = make([]histogramDistance, *histograms_size) + } else { + *histograms = (*histograms)[:*histograms_size] + } + self.histograms_ = *histograms + + /* Clear only current histogram. */ + histogramClearDistance(&self.histograms_[0]) + + self.last_histogram_ix_[1] = 0 + self.last_histogram_ix_[0] = self.last_histogram_ix_[1] +} + +/* Does either of three things: + (1) emits the current block with a new block type; + (2) emits the current block with the type of the second last block; + (3) merges the current block with the last block. */ +func blockSplitterFinishBlockDistance(self *blockSplitterDistance, is_final bool) { + var split *blockSplit = self.split_ + var last_entropy []float64 = self.last_entropy_[:] + var histograms []histogramDistance = self.histograms_ + self.block_size_ = brotli_max_size_t(self.block_size_, self.min_block_size_) + if self.num_blocks_ == 0 { + /* Create first block. */ + split.lengths[0] = uint32(self.block_size_) + + split.types[0] = 0 + last_entropy[0] = bitsEntropy(histograms[0].data_[:], self.alphabet_size_) + last_entropy[1] = last_entropy[0] + self.num_blocks_++ + split.num_types++ + self.curr_histogram_ix_++ + if self.curr_histogram_ix_ < *self.histograms_size_ { + histogramClearDistance(&histograms[self.curr_histogram_ix_]) + } + self.block_size_ = 0 + } else if self.block_size_ > 0 { + var entropy float64 = bitsEntropy(histograms[self.curr_histogram_ix_].data_[:], self.alphabet_size_) + var combined_histo [2]histogramDistance + var combined_entropy [2]float64 + var diff [2]float64 + var j uint + for j = 0; j < 2; j++ { + var last_histogram_ix uint = self.last_histogram_ix_[j] + combined_histo[j] = histograms[self.curr_histogram_ix_] + histogramAddHistogramDistance(&combined_histo[j], &histograms[last_histogram_ix]) + combined_entropy[j] = bitsEntropy(combined_histo[j].data_[0:], self.alphabet_size_) + diff[j] = combined_entropy[j] - entropy - last_entropy[j] + } + + if split.num_types < maxNumberOfBlockTypes && diff[0] > self.split_threshold_ && diff[1] > self.split_threshold_ { + /* Create new block. */ + split.lengths[self.num_blocks_] = uint32(self.block_size_) + + split.types[self.num_blocks_] = byte(split.num_types) + self.last_histogram_ix_[1] = self.last_histogram_ix_[0] + self.last_histogram_ix_[0] = uint(byte(split.num_types)) + last_entropy[1] = last_entropy[0] + last_entropy[0] = entropy + self.num_blocks_++ + split.num_types++ + self.curr_histogram_ix_++ + if self.curr_histogram_ix_ < *self.histograms_size_ { + histogramClearDistance(&histograms[self.curr_histogram_ix_]) + } + self.block_size_ = 0 + self.merge_last_count_ = 0 + self.target_block_size_ = self.min_block_size_ + } else if diff[1] < diff[0]-20.0 { + split.lengths[self.num_blocks_] = uint32(self.block_size_) + split.types[self.num_blocks_] = split.types[self.num_blocks_-2] + /* Combine this block with second last block. */ + + var tmp uint = self.last_histogram_ix_[0] + self.last_histogram_ix_[0] = self.last_histogram_ix_[1] + self.last_histogram_ix_[1] = tmp + histograms[self.last_histogram_ix_[0]] = combined_histo[1] + last_entropy[1] = last_entropy[0] + last_entropy[0] = combined_entropy[1] + self.num_blocks_++ + self.block_size_ = 0 + histogramClearDistance(&histograms[self.curr_histogram_ix_]) + self.merge_last_count_ = 0 + self.target_block_size_ = self.min_block_size_ + } else { + /* Combine this block with last block. */ + split.lengths[self.num_blocks_-1] += uint32(self.block_size_) + + histograms[self.last_histogram_ix_[0]] = combined_histo[0] + last_entropy[0] = combined_entropy[0] + if split.num_types == 1 { + last_entropy[1] = last_entropy[0] + } + + self.block_size_ = 0 + histogramClearDistance(&histograms[self.curr_histogram_ix_]) + self.merge_last_count_++ + if self.merge_last_count_ > 1 { + self.target_block_size_ += self.min_block_size_ + } + } + } + + if is_final { + *self.histograms_size_ = split.num_types + split.num_blocks = self.num_blocks_ + } +} + +/* Adds the next symbol to the current histogram. When the current histogram + reaches the target size, decides on merging the block. */ +func blockSplitterAddSymbolDistance(self *blockSplitterDistance, symbol uint) { + histogramAddDistance(&self.histograms_[self.curr_histogram_ix_], symbol) + self.block_size_++ + if self.block_size_ == self.target_block_size_ { + blockSplitterFinishBlockDistance(self, false) /* is_final = */ + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/metablock_literal.go b/backend/vendor/github.com/andybalholm/brotli/metablock_literal.go new file mode 100644 index 0000000..307f8da --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/metablock_literal.go @@ -0,0 +1,165 @@ +package brotli + +/* Copyright 2015 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Greedy block splitter for one block category (literal, command or distance). + */ +type blockSplitterLiteral struct { + alphabet_size_ uint + min_block_size_ uint + split_threshold_ float64 + num_blocks_ uint + split_ *blockSplit + histograms_ []histogramLiteral + histograms_size_ *uint + target_block_size_ uint + block_size_ uint + curr_histogram_ix_ uint + last_histogram_ix_ [2]uint + last_entropy_ [2]float64 + merge_last_count_ uint +} + +func initBlockSplitterLiteral(self *blockSplitterLiteral, alphabet_size uint, min_block_size uint, split_threshold float64, num_symbols uint, split *blockSplit, histograms *[]histogramLiteral, histograms_size *uint) { + var max_num_blocks uint = num_symbols/min_block_size + 1 + var max_num_types uint = brotli_min_size_t(max_num_blocks, maxNumberOfBlockTypes+1) + /* We have to allocate one more histogram than the maximum number of block + types for the current histogram when the meta-block is too big. */ + self.alphabet_size_ = alphabet_size + + self.min_block_size_ = min_block_size + self.split_threshold_ = split_threshold + self.num_blocks_ = 0 + self.split_ = split + self.histograms_size_ = histograms_size + self.target_block_size_ = min_block_size + self.block_size_ = 0 + self.curr_histogram_ix_ = 0 + self.merge_last_count_ = 0 + brotli_ensure_capacity_uint8_t(&split.types, &split.types_alloc_size, max_num_blocks) + brotli_ensure_capacity_uint32_t(&split.lengths, &split.lengths_alloc_size, max_num_blocks) + self.split_.num_blocks = max_num_blocks + *histograms_size = max_num_types + if histograms == nil || cap(*histograms) < int(*histograms_size) { + *histograms = make([]histogramLiteral, *histograms_size) + } else { + *histograms = (*histograms)[:*histograms_size] + } + self.histograms_ = *histograms + + /* Clear only current histogram. */ + histogramClearLiteral(&self.histograms_[0]) + + self.last_histogram_ix_[1] = 0 + self.last_histogram_ix_[0] = self.last_histogram_ix_[1] +} + +/* Does either of three things: + (1) emits the current block with a new block type; + (2) emits the current block with the type of the second last block; + (3) merges the current block with the last block. */ +func blockSplitterFinishBlockLiteral(self *blockSplitterLiteral, is_final bool) { + var split *blockSplit = self.split_ + var last_entropy []float64 = self.last_entropy_[:] + var histograms []histogramLiteral = self.histograms_ + self.block_size_ = brotli_max_size_t(self.block_size_, self.min_block_size_) + if self.num_blocks_ == 0 { + /* Create first block. */ + split.lengths[0] = uint32(self.block_size_) + + split.types[0] = 0 + last_entropy[0] = bitsEntropy(histograms[0].data_[:], self.alphabet_size_) + last_entropy[1] = last_entropy[0] + self.num_blocks_++ + split.num_types++ + self.curr_histogram_ix_++ + if self.curr_histogram_ix_ < *self.histograms_size_ { + histogramClearLiteral(&histograms[self.curr_histogram_ix_]) + } + self.block_size_ = 0 + } else if self.block_size_ > 0 { + var entropy float64 = bitsEntropy(histograms[self.curr_histogram_ix_].data_[:], self.alphabet_size_) + var combined_histo [2]histogramLiteral + var combined_entropy [2]float64 + var diff [2]float64 + var j uint + for j = 0; j < 2; j++ { + var last_histogram_ix uint = self.last_histogram_ix_[j] + combined_histo[j] = histograms[self.curr_histogram_ix_] + histogramAddHistogramLiteral(&combined_histo[j], &histograms[last_histogram_ix]) + combined_entropy[j] = bitsEntropy(combined_histo[j].data_[0:], self.alphabet_size_) + diff[j] = combined_entropy[j] - entropy - last_entropy[j] + } + + if split.num_types < maxNumberOfBlockTypes && diff[0] > self.split_threshold_ && diff[1] > self.split_threshold_ { + /* Create new block. */ + split.lengths[self.num_blocks_] = uint32(self.block_size_) + + split.types[self.num_blocks_] = byte(split.num_types) + self.last_histogram_ix_[1] = self.last_histogram_ix_[0] + self.last_histogram_ix_[0] = uint(byte(split.num_types)) + last_entropy[1] = last_entropy[0] + last_entropy[0] = entropy + self.num_blocks_++ + split.num_types++ + self.curr_histogram_ix_++ + if self.curr_histogram_ix_ < *self.histograms_size_ { + histogramClearLiteral(&histograms[self.curr_histogram_ix_]) + } + self.block_size_ = 0 + self.merge_last_count_ = 0 + self.target_block_size_ = self.min_block_size_ + } else if diff[1] < diff[0]-20.0 { + split.lengths[self.num_blocks_] = uint32(self.block_size_) + split.types[self.num_blocks_] = split.types[self.num_blocks_-2] + /* Combine this block with second last block. */ + + var tmp uint = self.last_histogram_ix_[0] + self.last_histogram_ix_[0] = self.last_histogram_ix_[1] + self.last_histogram_ix_[1] = tmp + histograms[self.last_histogram_ix_[0]] = combined_histo[1] + last_entropy[1] = last_entropy[0] + last_entropy[0] = combined_entropy[1] + self.num_blocks_++ + self.block_size_ = 0 + histogramClearLiteral(&histograms[self.curr_histogram_ix_]) + self.merge_last_count_ = 0 + self.target_block_size_ = self.min_block_size_ + } else { + /* Combine this block with last block. */ + split.lengths[self.num_blocks_-1] += uint32(self.block_size_) + + histograms[self.last_histogram_ix_[0]] = combined_histo[0] + last_entropy[0] = combined_entropy[0] + if split.num_types == 1 { + last_entropy[1] = last_entropy[0] + } + + self.block_size_ = 0 + histogramClearLiteral(&histograms[self.curr_histogram_ix_]) + self.merge_last_count_++ + if self.merge_last_count_ > 1 { + self.target_block_size_ += self.min_block_size_ + } + } + } + + if is_final { + *self.histograms_size_ = split.num_types + split.num_blocks = self.num_blocks_ + } +} + +/* Adds the next symbol to the current histogram. When the current histogram + reaches the target size, decides on merging the block. */ +func blockSplitterAddSymbolLiteral(self *blockSplitterLiteral, symbol uint) { + histogramAddLiteral(&self.histograms_[self.curr_histogram_ix_], symbol) + self.block_size_++ + if self.block_size_ == self.target_block_size_ { + blockSplitterFinishBlockLiteral(self, false) /* is_final = */ + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/params.go b/backend/vendor/github.com/andybalholm/brotli/params.go new file mode 100644 index 0000000..0a4c687 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/params.go @@ -0,0 +1,37 @@ +package brotli + +/* Copyright 2017 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Parameters for the Brotli encoder with chosen quality levels. */ +type hasherParams struct { + type_ int + bucket_bits int + block_bits int + hash_len int + num_last_distances_to_check int +} + +type distanceParams struct { + distance_postfix_bits uint32 + num_direct_distance_codes uint32 + alphabet_size uint32 + max_distance uint +} + +/* Encoding parameters */ +type encoderParams struct { + mode int + quality int + lgwin uint + lgblock int + size_hint uint + disable_literal_context_modeling bool + large_window bool + hasher hasherParams + dist distanceParams + dictionary encoderDictionary +} diff --git a/backend/vendor/github.com/andybalholm/brotli/platform.go b/backend/vendor/github.com/andybalholm/brotli/platform.go new file mode 100644 index 0000000..4ebfb15 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/platform.go @@ -0,0 +1,103 @@ +package brotli + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +func brotli_min_double(a float64, b float64) float64 { + if a < b { + return a + } else { + return b + } +} + +func brotli_max_double(a float64, b float64) float64 { + if a > b { + return a + } else { + return b + } +} + +func brotli_min_float(a float32, b float32) float32 { + if a < b { + return a + } else { + return b + } +} + +func brotli_max_float(a float32, b float32) float32 { + if a > b { + return a + } else { + return b + } +} + +func brotli_min_int(a int, b int) int { + if a < b { + return a + } else { + return b + } +} + +func brotli_max_int(a int, b int) int { + if a > b { + return a + } else { + return b + } +} + +func brotli_min_size_t(a uint, b uint) uint { + if a < b { + return a + } else { + return b + } +} + +func brotli_max_size_t(a uint, b uint) uint { + if a > b { + return a + } else { + return b + } +} + +func brotli_min_uint32_t(a uint32, b uint32) uint32 { + if a < b { + return a + } else { + return b + } +} + +func brotli_max_uint32_t(a uint32, b uint32) uint32 { + if a > b { + return a + } else { + return b + } +} + +func brotli_min_uint8_t(a byte, b byte) byte { + if a < b { + return a + } else { + return b + } +} + +func brotli_max_uint8_t(a byte, b byte) byte { + if a > b { + return a + } else { + return b + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/prefix.go b/backend/vendor/github.com/andybalholm/brotli/prefix.go new file mode 100644 index 0000000..484df0d --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/prefix.go @@ -0,0 +1,30 @@ +package brotli + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Functions for encoding of integers into prefix codes the amount of extra + bits, and the actual values of the extra bits. */ + +/* Here distance_code is an intermediate code, i.e. one of the special codes or + the actual distance increased by BROTLI_NUM_DISTANCE_SHORT_CODES - 1. */ +func prefixEncodeCopyDistance(distance_code uint, num_direct_codes uint, postfix_bits uint, code *uint16, extra_bits *uint32) { + if distance_code < numDistanceShortCodes+num_direct_codes { + *code = uint16(distance_code) + *extra_bits = 0 + return + } else { + var dist uint = (uint(1) << (postfix_bits + 2)) + (distance_code - numDistanceShortCodes - num_direct_codes) + var bucket uint = uint(log2FloorNonZero(dist) - 1) + var postfix_mask uint = (1 << postfix_bits) - 1 + var postfix uint = dist & postfix_mask + var prefix uint = (dist >> bucket) & 1 + var offset uint = (2 + prefix) << bucket + var nbits uint = bucket - postfix_bits + *code = uint16(nbits<<10 | (numDistanceShortCodes + num_direct_codes + ((2*(nbits-1) + prefix) << postfix_bits) + postfix)) + *extra_bits = uint32((dist - offset) >> postfix_bits) + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/prefix_dec.go b/backend/vendor/github.com/andybalholm/brotli/prefix_dec.go new file mode 100644 index 0000000..183f0d5 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/prefix_dec.go @@ -0,0 +1,723 @@ +package brotli + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +type cmdLutElement struct { + insert_len_extra_bits byte + copy_len_extra_bits byte + distance_code int8 + context byte + insert_len_offset uint16 + copy_len_offset uint16 +} + +var kCmdLut = [numCommandSymbols]cmdLutElement{ + cmdLutElement{0x00, 0x00, 0, 0x00, 0x0000, 0x0002}, + cmdLutElement{0x00, 0x00, 0, 0x01, 0x0000, 0x0003}, + cmdLutElement{0x00, 0x00, 0, 0x02, 0x0000, 0x0004}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0000, 0x0005}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0000, 0x0006}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0000, 0x0007}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0000, 0x0008}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0000, 0x0009}, + cmdLutElement{0x00, 0x00, 0, 0x00, 0x0001, 0x0002}, + cmdLutElement{0x00, 0x00, 0, 0x01, 0x0001, 0x0003}, + cmdLutElement{0x00, 0x00, 0, 0x02, 0x0001, 0x0004}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0001, 0x0005}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0001, 0x0006}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0001, 0x0007}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0001, 0x0008}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0001, 0x0009}, + cmdLutElement{0x00, 0x00, 0, 0x00, 0x0002, 0x0002}, + cmdLutElement{0x00, 0x00, 0, 0x01, 0x0002, 0x0003}, + cmdLutElement{0x00, 0x00, 0, 0x02, 0x0002, 0x0004}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0002, 0x0005}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0002, 0x0006}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0002, 0x0007}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0002, 0x0008}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0002, 0x0009}, + cmdLutElement{0x00, 0x00, 0, 0x00, 0x0003, 0x0002}, + cmdLutElement{0x00, 0x00, 0, 0x01, 0x0003, 0x0003}, + cmdLutElement{0x00, 0x00, 0, 0x02, 0x0003, 0x0004}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0003, 0x0005}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0003, 0x0006}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0003, 0x0007}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0003, 0x0008}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0003, 0x0009}, + cmdLutElement{0x00, 0x00, 0, 0x00, 0x0004, 0x0002}, + cmdLutElement{0x00, 0x00, 0, 0x01, 0x0004, 0x0003}, + cmdLutElement{0x00, 0x00, 0, 0x02, 0x0004, 0x0004}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0004, 0x0005}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0004, 0x0006}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0004, 0x0007}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0004, 0x0008}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0004, 0x0009}, + cmdLutElement{0x00, 0x00, 0, 0x00, 0x0005, 0x0002}, + cmdLutElement{0x00, 0x00, 0, 0x01, 0x0005, 0x0003}, + cmdLutElement{0x00, 0x00, 0, 0x02, 0x0005, 0x0004}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0005, 0x0005}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0005, 0x0006}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0005, 0x0007}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0005, 0x0008}, + cmdLutElement{0x00, 0x00, 0, 0x03, 0x0005, 0x0009}, + cmdLutElement{0x01, 0x00, 0, 0x00, 0x0006, 0x0002}, + cmdLutElement{0x01, 0x00, 0, 0x01, 0x0006, 0x0003}, + cmdLutElement{0x01, 0x00, 0, 0x02, 0x0006, 0x0004}, + cmdLutElement{0x01, 0x00, 0, 0x03, 0x0006, 0x0005}, + cmdLutElement{0x01, 0x00, 0, 0x03, 0x0006, 0x0006}, + cmdLutElement{0x01, 0x00, 0, 0x03, 0x0006, 0x0007}, + cmdLutElement{0x01, 0x00, 0, 0x03, 0x0006, 0x0008}, + cmdLutElement{0x01, 0x00, 0, 0x03, 0x0006, 0x0009}, + cmdLutElement{0x01, 0x00, 0, 0x00, 0x0008, 0x0002}, + cmdLutElement{0x01, 0x00, 0, 0x01, 0x0008, 0x0003}, + cmdLutElement{0x01, 0x00, 0, 0x02, 0x0008, 0x0004}, + cmdLutElement{0x01, 0x00, 0, 0x03, 0x0008, 0x0005}, + cmdLutElement{0x01, 0x00, 0, 0x03, 0x0008, 0x0006}, + cmdLutElement{0x01, 0x00, 0, 0x03, 0x0008, 0x0007}, + cmdLutElement{0x01, 0x00, 0, 0x03, 0x0008, 0x0008}, + cmdLutElement{0x01, 0x00, 0, 0x03, 0x0008, 0x0009}, + cmdLutElement{0x00, 0x01, 0, 0x03, 0x0000, 0x000a}, + cmdLutElement{0x00, 0x01, 0, 0x03, 0x0000, 0x000c}, + cmdLutElement{0x00, 0x02, 0, 0x03, 0x0000, 0x000e}, + cmdLutElement{0x00, 0x02, 0, 0x03, 0x0000, 0x0012}, + cmdLutElement{0x00, 0x03, 0, 0x03, 0x0000, 0x0016}, + cmdLutElement{0x00, 0x03, 0, 0x03, 0x0000, 0x001e}, + cmdLutElement{0x00, 0x04, 0, 0x03, 0x0000, 0x0026}, + cmdLutElement{0x00, 0x04, 0, 0x03, 0x0000, 0x0036}, + cmdLutElement{0x00, 0x01, 0, 0x03, 0x0001, 0x000a}, + cmdLutElement{0x00, 0x01, 0, 0x03, 0x0001, 0x000c}, + cmdLutElement{0x00, 0x02, 0, 0x03, 0x0001, 0x000e}, + cmdLutElement{0x00, 0x02, 0, 0x03, 0x0001, 0x0012}, + cmdLutElement{0x00, 0x03, 0, 0x03, 0x0001, 0x0016}, + cmdLutElement{0x00, 0x03, 0, 0x03, 0x0001, 0x001e}, + cmdLutElement{0x00, 0x04, 0, 0x03, 0x0001, 0x0026}, + cmdLutElement{0x00, 0x04, 0, 0x03, 0x0001, 0x0036}, + cmdLutElement{0x00, 0x01, 0, 0x03, 0x0002, 0x000a}, + cmdLutElement{0x00, 0x01, 0, 0x03, 0x0002, 0x000c}, + cmdLutElement{0x00, 0x02, 0, 0x03, 0x0002, 0x000e}, + cmdLutElement{0x00, 0x02, 0, 0x03, 0x0002, 0x0012}, + cmdLutElement{0x00, 0x03, 0, 0x03, 0x0002, 0x0016}, + cmdLutElement{0x00, 0x03, 0, 0x03, 0x0002, 0x001e}, + cmdLutElement{0x00, 0x04, 0, 0x03, 0x0002, 0x0026}, + cmdLutElement{0x00, 0x04, 0, 0x03, 0x0002, 0x0036}, + cmdLutElement{0x00, 0x01, 0, 0x03, 0x0003, 0x000a}, + cmdLutElement{0x00, 0x01, 0, 0x03, 0x0003, 0x000c}, + cmdLutElement{0x00, 0x02, 0, 0x03, 0x0003, 0x000e}, + cmdLutElement{0x00, 0x02, 0, 0x03, 0x0003, 0x0012}, + cmdLutElement{0x00, 0x03, 0, 0x03, 0x0003, 0x0016}, + cmdLutElement{0x00, 0x03, 0, 0x03, 0x0003, 0x001e}, + cmdLutElement{0x00, 0x04, 0, 0x03, 0x0003, 0x0026}, + cmdLutElement{0x00, 0x04, 0, 0x03, 0x0003, 0x0036}, + cmdLutElement{0x00, 0x01, 0, 0x03, 0x0004, 0x000a}, + cmdLutElement{0x00, 0x01, 0, 0x03, 0x0004, 0x000c}, + cmdLutElement{0x00, 0x02, 0, 0x03, 0x0004, 0x000e}, + cmdLutElement{0x00, 0x02, 0, 0x03, 0x0004, 0x0012}, + cmdLutElement{0x00, 0x03, 0, 0x03, 0x0004, 0x0016}, + cmdLutElement{0x00, 0x03, 0, 0x03, 0x0004, 0x001e}, + cmdLutElement{0x00, 0x04, 0, 0x03, 0x0004, 0x0026}, + cmdLutElement{0x00, 0x04, 0, 0x03, 0x0004, 0x0036}, + cmdLutElement{0x00, 0x01, 0, 0x03, 0x0005, 0x000a}, + cmdLutElement{0x00, 0x01, 0, 0x03, 0x0005, 0x000c}, + cmdLutElement{0x00, 0x02, 0, 0x03, 0x0005, 0x000e}, + cmdLutElement{0x00, 0x02, 0, 0x03, 0x0005, 0x0012}, + cmdLutElement{0x00, 0x03, 0, 0x03, 0x0005, 0x0016}, + cmdLutElement{0x00, 0x03, 0, 0x03, 0x0005, 0x001e}, + cmdLutElement{0x00, 0x04, 0, 0x03, 0x0005, 0x0026}, + cmdLutElement{0x00, 0x04, 0, 0x03, 0x0005, 0x0036}, + cmdLutElement{0x01, 0x01, 0, 0x03, 0x0006, 0x000a}, + cmdLutElement{0x01, 0x01, 0, 0x03, 0x0006, 0x000c}, + cmdLutElement{0x01, 0x02, 0, 0x03, 0x0006, 0x000e}, + cmdLutElement{0x01, 0x02, 0, 0x03, 0x0006, 0x0012}, + cmdLutElement{0x01, 0x03, 0, 0x03, 0x0006, 0x0016}, + cmdLutElement{0x01, 0x03, 0, 0x03, 0x0006, 0x001e}, + cmdLutElement{0x01, 0x04, 0, 0x03, 0x0006, 0x0026}, + cmdLutElement{0x01, 0x04, 0, 0x03, 0x0006, 0x0036}, + cmdLutElement{0x01, 0x01, 0, 0x03, 0x0008, 0x000a}, + cmdLutElement{0x01, 0x01, 0, 0x03, 0x0008, 0x000c}, + cmdLutElement{0x01, 0x02, 0, 0x03, 0x0008, 0x000e}, + cmdLutElement{0x01, 0x02, 0, 0x03, 0x0008, 0x0012}, + cmdLutElement{0x01, 0x03, 0, 0x03, 0x0008, 0x0016}, + cmdLutElement{0x01, 0x03, 0, 0x03, 0x0008, 0x001e}, + cmdLutElement{0x01, 0x04, 0, 0x03, 0x0008, 0x0026}, + cmdLutElement{0x01, 0x04, 0, 0x03, 0x0008, 0x0036}, + cmdLutElement{0x00, 0x00, -1, 0x00, 0x0000, 0x0002}, + cmdLutElement{0x00, 0x00, -1, 0x01, 0x0000, 0x0003}, + cmdLutElement{0x00, 0x00, -1, 0x02, 0x0000, 0x0004}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0000, 0x0005}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0000, 0x0006}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0000, 0x0007}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0000, 0x0008}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0000, 0x0009}, + cmdLutElement{0x00, 0x00, -1, 0x00, 0x0001, 0x0002}, + cmdLutElement{0x00, 0x00, -1, 0x01, 0x0001, 0x0003}, + cmdLutElement{0x00, 0x00, -1, 0x02, 0x0001, 0x0004}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0001, 0x0005}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0001, 0x0006}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0001, 0x0007}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0001, 0x0008}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0001, 0x0009}, + cmdLutElement{0x00, 0x00, -1, 0x00, 0x0002, 0x0002}, + cmdLutElement{0x00, 0x00, -1, 0x01, 0x0002, 0x0003}, + cmdLutElement{0x00, 0x00, -1, 0x02, 0x0002, 0x0004}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0002, 0x0005}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0002, 0x0006}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0002, 0x0007}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0002, 0x0008}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0002, 0x0009}, + cmdLutElement{0x00, 0x00, -1, 0x00, 0x0003, 0x0002}, + cmdLutElement{0x00, 0x00, -1, 0x01, 0x0003, 0x0003}, + cmdLutElement{0x00, 0x00, -1, 0x02, 0x0003, 0x0004}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0003, 0x0005}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0003, 0x0006}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0003, 0x0007}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0003, 0x0008}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0003, 0x0009}, + cmdLutElement{0x00, 0x00, -1, 0x00, 0x0004, 0x0002}, + cmdLutElement{0x00, 0x00, -1, 0x01, 0x0004, 0x0003}, + cmdLutElement{0x00, 0x00, -1, 0x02, 0x0004, 0x0004}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0004, 0x0005}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0004, 0x0006}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0004, 0x0007}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0004, 0x0008}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0004, 0x0009}, + cmdLutElement{0x00, 0x00, -1, 0x00, 0x0005, 0x0002}, + cmdLutElement{0x00, 0x00, -1, 0x01, 0x0005, 0x0003}, + cmdLutElement{0x00, 0x00, -1, 0x02, 0x0005, 0x0004}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0005, 0x0005}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0005, 0x0006}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0005, 0x0007}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0005, 0x0008}, + cmdLutElement{0x00, 0x00, -1, 0x03, 0x0005, 0x0009}, + cmdLutElement{0x01, 0x00, -1, 0x00, 0x0006, 0x0002}, + cmdLutElement{0x01, 0x00, -1, 0x01, 0x0006, 0x0003}, + cmdLutElement{0x01, 0x00, -1, 0x02, 0x0006, 0x0004}, + cmdLutElement{0x01, 0x00, -1, 0x03, 0x0006, 0x0005}, + cmdLutElement{0x01, 0x00, -1, 0x03, 0x0006, 0x0006}, + cmdLutElement{0x01, 0x00, -1, 0x03, 0x0006, 0x0007}, + cmdLutElement{0x01, 0x00, -1, 0x03, 0x0006, 0x0008}, + cmdLutElement{0x01, 0x00, -1, 0x03, 0x0006, 0x0009}, + cmdLutElement{0x01, 0x00, -1, 0x00, 0x0008, 0x0002}, + cmdLutElement{0x01, 0x00, -1, 0x01, 0x0008, 0x0003}, + cmdLutElement{0x01, 0x00, -1, 0x02, 0x0008, 0x0004}, + cmdLutElement{0x01, 0x00, -1, 0x03, 0x0008, 0x0005}, + cmdLutElement{0x01, 0x00, -1, 0x03, 0x0008, 0x0006}, + cmdLutElement{0x01, 0x00, -1, 0x03, 0x0008, 0x0007}, + cmdLutElement{0x01, 0x00, -1, 0x03, 0x0008, 0x0008}, + cmdLutElement{0x01, 0x00, -1, 0x03, 0x0008, 0x0009}, + cmdLutElement{0x00, 0x01, -1, 0x03, 0x0000, 0x000a}, + cmdLutElement{0x00, 0x01, -1, 0x03, 0x0000, 0x000c}, + cmdLutElement{0x00, 0x02, -1, 0x03, 0x0000, 0x000e}, + cmdLutElement{0x00, 0x02, -1, 0x03, 0x0000, 0x0012}, + cmdLutElement{0x00, 0x03, -1, 0x03, 0x0000, 0x0016}, + cmdLutElement{0x00, 0x03, -1, 0x03, 0x0000, 0x001e}, + cmdLutElement{0x00, 0x04, -1, 0x03, 0x0000, 0x0026}, + cmdLutElement{0x00, 0x04, -1, 0x03, 0x0000, 0x0036}, + cmdLutElement{0x00, 0x01, -1, 0x03, 0x0001, 0x000a}, + cmdLutElement{0x00, 0x01, -1, 0x03, 0x0001, 0x000c}, + cmdLutElement{0x00, 0x02, -1, 0x03, 0x0001, 0x000e}, + cmdLutElement{0x00, 0x02, -1, 0x03, 0x0001, 0x0012}, + cmdLutElement{0x00, 0x03, -1, 0x03, 0x0001, 0x0016}, + cmdLutElement{0x00, 0x03, -1, 0x03, 0x0001, 0x001e}, + cmdLutElement{0x00, 0x04, -1, 0x03, 0x0001, 0x0026}, + cmdLutElement{0x00, 0x04, -1, 0x03, 0x0001, 0x0036}, + cmdLutElement{0x00, 0x01, -1, 0x03, 0x0002, 0x000a}, + cmdLutElement{0x00, 0x01, -1, 0x03, 0x0002, 0x000c}, + cmdLutElement{0x00, 0x02, -1, 0x03, 0x0002, 0x000e}, + cmdLutElement{0x00, 0x02, -1, 0x03, 0x0002, 0x0012}, + cmdLutElement{0x00, 0x03, -1, 0x03, 0x0002, 0x0016}, + cmdLutElement{0x00, 0x03, -1, 0x03, 0x0002, 0x001e}, + cmdLutElement{0x00, 0x04, -1, 0x03, 0x0002, 0x0026}, + cmdLutElement{0x00, 0x04, -1, 0x03, 0x0002, 0x0036}, + cmdLutElement{0x00, 0x01, -1, 0x03, 0x0003, 0x000a}, + cmdLutElement{0x00, 0x01, -1, 0x03, 0x0003, 0x000c}, + cmdLutElement{0x00, 0x02, -1, 0x03, 0x0003, 0x000e}, + cmdLutElement{0x00, 0x02, -1, 0x03, 0x0003, 0x0012}, + cmdLutElement{0x00, 0x03, -1, 0x03, 0x0003, 0x0016}, + cmdLutElement{0x00, 0x03, -1, 0x03, 0x0003, 0x001e}, + cmdLutElement{0x00, 0x04, -1, 0x03, 0x0003, 0x0026}, + cmdLutElement{0x00, 0x04, -1, 0x03, 0x0003, 0x0036}, + cmdLutElement{0x00, 0x01, -1, 0x03, 0x0004, 0x000a}, + cmdLutElement{0x00, 0x01, -1, 0x03, 0x0004, 0x000c}, + cmdLutElement{0x00, 0x02, -1, 0x03, 0x0004, 0x000e}, + cmdLutElement{0x00, 0x02, -1, 0x03, 0x0004, 0x0012}, + cmdLutElement{0x00, 0x03, -1, 0x03, 0x0004, 0x0016}, + cmdLutElement{0x00, 0x03, -1, 0x03, 0x0004, 0x001e}, + cmdLutElement{0x00, 0x04, -1, 0x03, 0x0004, 0x0026}, + cmdLutElement{0x00, 0x04, -1, 0x03, 0x0004, 0x0036}, + cmdLutElement{0x00, 0x01, -1, 0x03, 0x0005, 0x000a}, + cmdLutElement{0x00, 0x01, -1, 0x03, 0x0005, 0x000c}, + cmdLutElement{0x00, 0x02, -1, 0x03, 0x0005, 0x000e}, + cmdLutElement{0x00, 0x02, -1, 0x03, 0x0005, 0x0012}, + cmdLutElement{0x00, 0x03, -1, 0x03, 0x0005, 0x0016}, + cmdLutElement{0x00, 0x03, -1, 0x03, 0x0005, 0x001e}, + cmdLutElement{0x00, 0x04, -1, 0x03, 0x0005, 0x0026}, + cmdLutElement{0x00, 0x04, -1, 0x03, 0x0005, 0x0036}, + cmdLutElement{0x01, 0x01, -1, 0x03, 0x0006, 0x000a}, + cmdLutElement{0x01, 0x01, -1, 0x03, 0x0006, 0x000c}, + cmdLutElement{0x01, 0x02, -1, 0x03, 0x0006, 0x000e}, + cmdLutElement{0x01, 0x02, -1, 0x03, 0x0006, 0x0012}, + cmdLutElement{0x01, 0x03, -1, 0x03, 0x0006, 0x0016}, + cmdLutElement{0x01, 0x03, -1, 0x03, 0x0006, 0x001e}, + cmdLutElement{0x01, 0x04, -1, 0x03, 0x0006, 0x0026}, + cmdLutElement{0x01, 0x04, -1, 0x03, 0x0006, 0x0036}, + cmdLutElement{0x01, 0x01, -1, 0x03, 0x0008, 0x000a}, + cmdLutElement{0x01, 0x01, -1, 0x03, 0x0008, 0x000c}, + cmdLutElement{0x01, 0x02, -1, 0x03, 0x0008, 0x000e}, + cmdLutElement{0x01, 0x02, -1, 0x03, 0x0008, 0x0012}, + cmdLutElement{0x01, 0x03, -1, 0x03, 0x0008, 0x0016}, + cmdLutElement{0x01, 0x03, -1, 0x03, 0x0008, 0x001e}, + cmdLutElement{0x01, 0x04, -1, 0x03, 0x0008, 0x0026}, + cmdLutElement{0x01, 0x04, -1, 0x03, 0x0008, 0x0036}, + cmdLutElement{0x02, 0x00, -1, 0x00, 0x000a, 0x0002}, + cmdLutElement{0x02, 0x00, -1, 0x01, 0x000a, 0x0003}, + cmdLutElement{0x02, 0x00, -1, 0x02, 0x000a, 0x0004}, + cmdLutElement{0x02, 0x00, -1, 0x03, 0x000a, 0x0005}, + cmdLutElement{0x02, 0x00, -1, 0x03, 0x000a, 0x0006}, + cmdLutElement{0x02, 0x00, -1, 0x03, 0x000a, 0x0007}, + cmdLutElement{0x02, 0x00, -1, 0x03, 0x000a, 0x0008}, + cmdLutElement{0x02, 0x00, -1, 0x03, 0x000a, 0x0009}, + cmdLutElement{0x02, 0x00, -1, 0x00, 0x000e, 0x0002}, + cmdLutElement{0x02, 0x00, -1, 0x01, 0x000e, 0x0003}, + cmdLutElement{0x02, 0x00, -1, 0x02, 0x000e, 0x0004}, + cmdLutElement{0x02, 0x00, -1, 0x03, 0x000e, 0x0005}, + cmdLutElement{0x02, 0x00, -1, 0x03, 0x000e, 0x0006}, + cmdLutElement{0x02, 0x00, -1, 0x03, 0x000e, 0x0007}, + cmdLutElement{0x02, 0x00, -1, 0x03, 0x000e, 0x0008}, + cmdLutElement{0x02, 0x00, -1, 0x03, 0x000e, 0x0009}, + cmdLutElement{0x03, 0x00, -1, 0x00, 0x0012, 0x0002}, + cmdLutElement{0x03, 0x00, -1, 0x01, 0x0012, 0x0003}, + cmdLutElement{0x03, 0x00, -1, 0x02, 0x0012, 0x0004}, + cmdLutElement{0x03, 0x00, -1, 0x03, 0x0012, 0x0005}, + cmdLutElement{0x03, 0x00, -1, 0x03, 0x0012, 0x0006}, + cmdLutElement{0x03, 0x00, -1, 0x03, 0x0012, 0x0007}, + cmdLutElement{0x03, 0x00, -1, 0x03, 0x0012, 0x0008}, + cmdLutElement{0x03, 0x00, -1, 0x03, 0x0012, 0x0009}, + cmdLutElement{0x03, 0x00, -1, 0x00, 0x001a, 0x0002}, + cmdLutElement{0x03, 0x00, -1, 0x01, 0x001a, 0x0003}, + cmdLutElement{0x03, 0x00, -1, 0x02, 0x001a, 0x0004}, + cmdLutElement{0x03, 0x00, -1, 0x03, 0x001a, 0x0005}, + cmdLutElement{0x03, 0x00, -1, 0x03, 0x001a, 0x0006}, + cmdLutElement{0x03, 0x00, -1, 0x03, 0x001a, 0x0007}, + cmdLutElement{0x03, 0x00, -1, 0x03, 0x001a, 0x0008}, + cmdLutElement{0x03, 0x00, -1, 0x03, 0x001a, 0x0009}, + cmdLutElement{0x04, 0x00, -1, 0x00, 0x0022, 0x0002}, + cmdLutElement{0x04, 0x00, -1, 0x01, 0x0022, 0x0003}, + cmdLutElement{0x04, 0x00, -1, 0x02, 0x0022, 0x0004}, + cmdLutElement{0x04, 0x00, -1, 0x03, 0x0022, 0x0005}, + cmdLutElement{0x04, 0x00, -1, 0x03, 0x0022, 0x0006}, + cmdLutElement{0x04, 0x00, -1, 0x03, 0x0022, 0x0007}, + cmdLutElement{0x04, 0x00, -1, 0x03, 0x0022, 0x0008}, + cmdLutElement{0x04, 0x00, -1, 0x03, 0x0022, 0x0009}, + cmdLutElement{0x04, 0x00, -1, 0x00, 0x0032, 0x0002}, + cmdLutElement{0x04, 0x00, -1, 0x01, 0x0032, 0x0003}, + cmdLutElement{0x04, 0x00, -1, 0x02, 0x0032, 0x0004}, + cmdLutElement{0x04, 0x00, -1, 0x03, 0x0032, 0x0005}, + cmdLutElement{0x04, 0x00, -1, 0x03, 0x0032, 0x0006}, + cmdLutElement{0x04, 0x00, -1, 0x03, 0x0032, 0x0007}, + cmdLutElement{0x04, 0x00, -1, 0x03, 0x0032, 0x0008}, + cmdLutElement{0x04, 0x00, -1, 0x03, 0x0032, 0x0009}, + cmdLutElement{0x05, 0x00, -1, 0x00, 0x0042, 0x0002}, + cmdLutElement{0x05, 0x00, -1, 0x01, 0x0042, 0x0003}, + cmdLutElement{0x05, 0x00, -1, 0x02, 0x0042, 0x0004}, + cmdLutElement{0x05, 0x00, -1, 0x03, 0x0042, 0x0005}, + cmdLutElement{0x05, 0x00, -1, 0x03, 0x0042, 0x0006}, + cmdLutElement{0x05, 0x00, -1, 0x03, 0x0042, 0x0007}, + cmdLutElement{0x05, 0x00, -1, 0x03, 0x0042, 0x0008}, + cmdLutElement{0x05, 0x00, -1, 0x03, 0x0042, 0x0009}, + cmdLutElement{0x05, 0x00, -1, 0x00, 0x0062, 0x0002}, + cmdLutElement{0x05, 0x00, -1, 0x01, 0x0062, 0x0003}, + cmdLutElement{0x05, 0x00, -1, 0x02, 0x0062, 0x0004}, + cmdLutElement{0x05, 0x00, -1, 0x03, 0x0062, 0x0005}, + cmdLutElement{0x05, 0x00, -1, 0x03, 0x0062, 0x0006}, + cmdLutElement{0x05, 0x00, -1, 0x03, 0x0062, 0x0007}, + cmdLutElement{0x05, 0x00, -1, 0x03, 0x0062, 0x0008}, + cmdLutElement{0x05, 0x00, -1, 0x03, 0x0062, 0x0009}, + cmdLutElement{0x02, 0x01, -1, 0x03, 0x000a, 0x000a}, + cmdLutElement{0x02, 0x01, -1, 0x03, 0x000a, 0x000c}, + cmdLutElement{0x02, 0x02, -1, 0x03, 0x000a, 0x000e}, + cmdLutElement{0x02, 0x02, -1, 0x03, 0x000a, 0x0012}, + cmdLutElement{0x02, 0x03, -1, 0x03, 0x000a, 0x0016}, + cmdLutElement{0x02, 0x03, -1, 0x03, 0x000a, 0x001e}, + cmdLutElement{0x02, 0x04, -1, 0x03, 0x000a, 0x0026}, + cmdLutElement{0x02, 0x04, -1, 0x03, 0x000a, 0x0036}, + cmdLutElement{0x02, 0x01, -1, 0x03, 0x000e, 0x000a}, + cmdLutElement{0x02, 0x01, -1, 0x03, 0x000e, 0x000c}, + cmdLutElement{0x02, 0x02, -1, 0x03, 0x000e, 0x000e}, + cmdLutElement{0x02, 0x02, -1, 0x03, 0x000e, 0x0012}, + cmdLutElement{0x02, 0x03, -1, 0x03, 0x000e, 0x0016}, + cmdLutElement{0x02, 0x03, -1, 0x03, 0x000e, 0x001e}, + cmdLutElement{0x02, 0x04, -1, 0x03, 0x000e, 0x0026}, + cmdLutElement{0x02, 0x04, -1, 0x03, 0x000e, 0x0036}, + cmdLutElement{0x03, 0x01, -1, 0x03, 0x0012, 0x000a}, + cmdLutElement{0x03, 0x01, -1, 0x03, 0x0012, 0x000c}, + cmdLutElement{0x03, 0x02, -1, 0x03, 0x0012, 0x000e}, + cmdLutElement{0x03, 0x02, -1, 0x03, 0x0012, 0x0012}, + cmdLutElement{0x03, 0x03, -1, 0x03, 0x0012, 0x0016}, + cmdLutElement{0x03, 0x03, -1, 0x03, 0x0012, 0x001e}, + cmdLutElement{0x03, 0x04, -1, 0x03, 0x0012, 0x0026}, + cmdLutElement{0x03, 0x04, -1, 0x03, 0x0012, 0x0036}, + cmdLutElement{0x03, 0x01, -1, 0x03, 0x001a, 0x000a}, + cmdLutElement{0x03, 0x01, -1, 0x03, 0x001a, 0x000c}, + cmdLutElement{0x03, 0x02, -1, 0x03, 0x001a, 0x000e}, + cmdLutElement{0x03, 0x02, -1, 0x03, 0x001a, 0x0012}, + cmdLutElement{0x03, 0x03, -1, 0x03, 0x001a, 0x0016}, + cmdLutElement{0x03, 0x03, -1, 0x03, 0x001a, 0x001e}, + cmdLutElement{0x03, 0x04, -1, 0x03, 0x001a, 0x0026}, + cmdLutElement{0x03, 0x04, -1, 0x03, 0x001a, 0x0036}, + cmdLutElement{0x04, 0x01, -1, 0x03, 0x0022, 0x000a}, + cmdLutElement{0x04, 0x01, -1, 0x03, 0x0022, 0x000c}, + cmdLutElement{0x04, 0x02, -1, 0x03, 0x0022, 0x000e}, + cmdLutElement{0x04, 0x02, -1, 0x03, 0x0022, 0x0012}, + cmdLutElement{0x04, 0x03, -1, 0x03, 0x0022, 0x0016}, + cmdLutElement{0x04, 0x03, -1, 0x03, 0x0022, 0x001e}, + cmdLutElement{0x04, 0x04, -1, 0x03, 0x0022, 0x0026}, + cmdLutElement{0x04, 0x04, -1, 0x03, 0x0022, 0x0036}, + cmdLutElement{0x04, 0x01, -1, 0x03, 0x0032, 0x000a}, + cmdLutElement{0x04, 0x01, -1, 0x03, 0x0032, 0x000c}, + cmdLutElement{0x04, 0x02, -1, 0x03, 0x0032, 0x000e}, + cmdLutElement{0x04, 0x02, -1, 0x03, 0x0032, 0x0012}, + cmdLutElement{0x04, 0x03, -1, 0x03, 0x0032, 0x0016}, + cmdLutElement{0x04, 0x03, -1, 0x03, 0x0032, 0x001e}, + cmdLutElement{0x04, 0x04, -1, 0x03, 0x0032, 0x0026}, + cmdLutElement{0x04, 0x04, -1, 0x03, 0x0032, 0x0036}, + cmdLutElement{0x05, 0x01, -1, 0x03, 0x0042, 0x000a}, + cmdLutElement{0x05, 0x01, -1, 0x03, 0x0042, 0x000c}, + cmdLutElement{0x05, 0x02, -1, 0x03, 0x0042, 0x000e}, + cmdLutElement{0x05, 0x02, -1, 0x03, 0x0042, 0x0012}, + cmdLutElement{0x05, 0x03, -1, 0x03, 0x0042, 0x0016}, + cmdLutElement{0x05, 0x03, -1, 0x03, 0x0042, 0x001e}, + cmdLutElement{0x05, 0x04, -1, 0x03, 0x0042, 0x0026}, + cmdLutElement{0x05, 0x04, -1, 0x03, 0x0042, 0x0036}, + cmdLutElement{0x05, 0x01, -1, 0x03, 0x0062, 0x000a}, + cmdLutElement{0x05, 0x01, -1, 0x03, 0x0062, 0x000c}, + cmdLutElement{0x05, 0x02, -1, 0x03, 0x0062, 0x000e}, + cmdLutElement{0x05, 0x02, -1, 0x03, 0x0062, 0x0012}, + cmdLutElement{0x05, 0x03, -1, 0x03, 0x0062, 0x0016}, + cmdLutElement{0x05, 0x03, -1, 0x03, 0x0062, 0x001e}, + cmdLutElement{0x05, 0x04, -1, 0x03, 0x0062, 0x0026}, + cmdLutElement{0x05, 0x04, -1, 0x03, 0x0062, 0x0036}, + cmdLutElement{0x00, 0x05, -1, 0x03, 0x0000, 0x0046}, + cmdLutElement{0x00, 0x05, -1, 0x03, 0x0000, 0x0066}, + cmdLutElement{0x00, 0x06, -1, 0x03, 0x0000, 0x0086}, + cmdLutElement{0x00, 0x07, -1, 0x03, 0x0000, 0x00c6}, + cmdLutElement{0x00, 0x08, -1, 0x03, 0x0000, 0x0146}, + cmdLutElement{0x00, 0x09, -1, 0x03, 0x0000, 0x0246}, + cmdLutElement{0x00, 0x0a, -1, 0x03, 0x0000, 0x0446}, + cmdLutElement{0x00, 0x18, -1, 0x03, 0x0000, 0x0846}, + cmdLutElement{0x00, 0x05, -1, 0x03, 0x0001, 0x0046}, + cmdLutElement{0x00, 0x05, -1, 0x03, 0x0001, 0x0066}, + cmdLutElement{0x00, 0x06, -1, 0x03, 0x0001, 0x0086}, + cmdLutElement{0x00, 0x07, -1, 0x03, 0x0001, 0x00c6}, + cmdLutElement{0x00, 0x08, -1, 0x03, 0x0001, 0x0146}, + cmdLutElement{0x00, 0x09, -1, 0x03, 0x0001, 0x0246}, + cmdLutElement{0x00, 0x0a, -1, 0x03, 0x0001, 0x0446}, + cmdLutElement{0x00, 0x18, -1, 0x03, 0x0001, 0x0846}, + cmdLutElement{0x00, 0x05, -1, 0x03, 0x0002, 0x0046}, + cmdLutElement{0x00, 0x05, -1, 0x03, 0x0002, 0x0066}, + cmdLutElement{0x00, 0x06, -1, 0x03, 0x0002, 0x0086}, + cmdLutElement{0x00, 0x07, -1, 0x03, 0x0002, 0x00c6}, + cmdLutElement{0x00, 0x08, -1, 0x03, 0x0002, 0x0146}, + cmdLutElement{0x00, 0x09, -1, 0x03, 0x0002, 0x0246}, + cmdLutElement{0x00, 0x0a, -1, 0x03, 0x0002, 0x0446}, + cmdLutElement{0x00, 0x18, -1, 0x03, 0x0002, 0x0846}, + cmdLutElement{0x00, 0x05, -1, 0x03, 0x0003, 0x0046}, + cmdLutElement{0x00, 0x05, -1, 0x03, 0x0003, 0x0066}, + cmdLutElement{0x00, 0x06, -1, 0x03, 0x0003, 0x0086}, + cmdLutElement{0x00, 0x07, -1, 0x03, 0x0003, 0x00c6}, + cmdLutElement{0x00, 0x08, -1, 0x03, 0x0003, 0x0146}, + cmdLutElement{0x00, 0x09, -1, 0x03, 0x0003, 0x0246}, + cmdLutElement{0x00, 0x0a, -1, 0x03, 0x0003, 0x0446}, + cmdLutElement{0x00, 0x18, -1, 0x03, 0x0003, 0x0846}, + cmdLutElement{0x00, 0x05, -1, 0x03, 0x0004, 0x0046}, + cmdLutElement{0x00, 0x05, -1, 0x03, 0x0004, 0x0066}, + cmdLutElement{0x00, 0x06, -1, 0x03, 0x0004, 0x0086}, + cmdLutElement{0x00, 0x07, -1, 0x03, 0x0004, 0x00c6}, + cmdLutElement{0x00, 0x08, -1, 0x03, 0x0004, 0x0146}, + cmdLutElement{0x00, 0x09, -1, 0x03, 0x0004, 0x0246}, + cmdLutElement{0x00, 0x0a, -1, 0x03, 0x0004, 0x0446}, + cmdLutElement{0x00, 0x18, -1, 0x03, 0x0004, 0x0846}, + cmdLutElement{0x00, 0x05, -1, 0x03, 0x0005, 0x0046}, + cmdLutElement{0x00, 0x05, -1, 0x03, 0x0005, 0x0066}, + cmdLutElement{0x00, 0x06, -1, 0x03, 0x0005, 0x0086}, + cmdLutElement{0x00, 0x07, -1, 0x03, 0x0005, 0x00c6}, + cmdLutElement{0x00, 0x08, -1, 0x03, 0x0005, 0x0146}, + cmdLutElement{0x00, 0x09, -1, 0x03, 0x0005, 0x0246}, + cmdLutElement{0x00, 0x0a, -1, 0x03, 0x0005, 0x0446}, + cmdLutElement{0x00, 0x18, -1, 0x03, 0x0005, 0x0846}, + cmdLutElement{0x01, 0x05, -1, 0x03, 0x0006, 0x0046}, + cmdLutElement{0x01, 0x05, -1, 0x03, 0x0006, 0x0066}, + cmdLutElement{0x01, 0x06, -1, 0x03, 0x0006, 0x0086}, + cmdLutElement{0x01, 0x07, -1, 0x03, 0x0006, 0x00c6}, + cmdLutElement{0x01, 0x08, -1, 0x03, 0x0006, 0x0146}, + cmdLutElement{0x01, 0x09, -1, 0x03, 0x0006, 0x0246}, + cmdLutElement{0x01, 0x0a, -1, 0x03, 0x0006, 0x0446}, + cmdLutElement{0x01, 0x18, -1, 0x03, 0x0006, 0x0846}, + cmdLutElement{0x01, 0x05, -1, 0x03, 0x0008, 0x0046}, + cmdLutElement{0x01, 0x05, -1, 0x03, 0x0008, 0x0066}, + cmdLutElement{0x01, 0x06, -1, 0x03, 0x0008, 0x0086}, + cmdLutElement{0x01, 0x07, -1, 0x03, 0x0008, 0x00c6}, + cmdLutElement{0x01, 0x08, -1, 0x03, 0x0008, 0x0146}, + cmdLutElement{0x01, 0x09, -1, 0x03, 0x0008, 0x0246}, + cmdLutElement{0x01, 0x0a, -1, 0x03, 0x0008, 0x0446}, + cmdLutElement{0x01, 0x18, -1, 0x03, 0x0008, 0x0846}, + cmdLutElement{0x06, 0x00, -1, 0x00, 0x0082, 0x0002}, + cmdLutElement{0x06, 0x00, -1, 0x01, 0x0082, 0x0003}, + cmdLutElement{0x06, 0x00, -1, 0x02, 0x0082, 0x0004}, + cmdLutElement{0x06, 0x00, -1, 0x03, 0x0082, 0x0005}, + cmdLutElement{0x06, 0x00, -1, 0x03, 0x0082, 0x0006}, + cmdLutElement{0x06, 0x00, -1, 0x03, 0x0082, 0x0007}, + cmdLutElement{0x06, 0x00, -1, 0x03, 0x0082, 0x0008}, + cmdLutElement{0x06, 0x00, -1, 0x03, 0x0082, 0x0009}, + cmdLutElement{0x07, 0x00, -1, 0x00, 0x00c2, 0x0002}, + cmdLutElement{0x07, 0x00, -1, 0x01, 0x00c2, 0x0003}, + cmdLutElement{0x07, 0x00, -1, 0x02, 0x00c2, 0x0004}, + cmdLutElement{0x07, 0x00, -1, 0x03, 0x00c2, 0x0005}, + cmdLutElement{0x07, 0x00, -1, 0x03, 0x00c2, 0x0006}, + cmdLutElement{0x07, 0x00, -1, 0x03, 0x00c2, 0x0007}, + cmdLutElement{0x07, 0x00, -1, 0x03, 0x00c2, 0x0008}, + cmdLutElement{0x07, 0x00, -1, 0x03, 0x00c2, 0x0009}, + cmdLutElement{0x08, 0x00, -1, 0x00, 0x0142, 0x0002}, + cmdLutElement{0x08, 0x00, -1, 0x01, 0x0142, 0x0003}, + cmdLutElement{0x08, 0x00, -1, 0x02, 0x0142, 0x0004}, + cmdLutElement{0x08, 0x00, -1, 0x03, 0x0142, 0x0005}, + cmdLutElement{0x08, 0x00, -1, 0x03, 0x0142, 0x0006}, + cmdLutElement{0x08, 0x00, -1, 0x03, 0x0142, 0x0007}, + cmdLutElement{0x08, 0x00, -1, 0x03, 0x0142, 0x0008}, + cmdLutElement{0x08, 0x00, -1, 0x03, 0x0142, 0x0009}, + cmdLutElement{0x09, 0x00, -1, 0x00, 0x0242, 0x0002}, + cmdLutElement{0x09, 0x00, -1, 0x01, 0x0242, 0x0003}, + cmdLutElement{0x09, 0x00, -1, 0x02, 0x0242, 0x0004}, + cmdLutElement{0x09, 0x00, -1, 0x03, 0x0242, 0x0005}, + cmdLutElement{0x09, 0x00, -1, 0x03, 0x0242, 0x0006}, + cmdLutElement{0x09, 0x00, -1, 0x03, 0x0242, 0x0007}, + cmdLutElement{0x09, 0x00, -1, 0x03, 0x0242, 0x0008}, + cmdLutElement{0x09, 0x00, -1, 0x03, 0x0242, 0x0009}, + cmdLutElement{0x0a, 0x00, -1, 0x00, 0x0442, 0x0002}, + cmdLutElement{0x0a, 0x00, -1, 0x01, 0x0442, 0x0003}, + cmdLutElement{0x0a, 0x00, -1, 0x02, 0x0442, 0x0004}, + cmdLutElement{0x0a, 0x00, -1, 0x03, 0x0442, 0x0005}, + cmdLutElement{0x0a, 0x00, -1, 0x03, 0x0442, 0x0006}, + cmdLutElement{0x0a, 0x00, -1, 0x03, 0x0442, 0x0007}, + cmdLutElement{0x0a, 0x00, -1, 0x03, 0x0442, 0x0008}, + cmdLutElement{0x0a, 0x00, -1, 0x03, 0x0442, 0x0009}, + cmdLutElement{0x0c, 0x00, -1, 0x00, 0x0842, 0x0002}, + cmdLutElement{0x0c, 0x00, -1, 0x01, 0x0842, 0x0003}, + cmdLutElement{0x0c, 0x00, -1, 0x02, 0x0842, 0x0004}, + cmdLutElement{0x0c, 0x00, -1, 0x03, 0x0842, 0x0005}, + cmdLutElement{0x0c, 0x00, -1, 0x03, 0x0842, 0x0006}, + cmdLutElement{0x0c, 0x00, -1, 0x03, 0x0842, 0x0007}, + cmdLutElement{0x0c, 0x00, -1, 0x03, 0x0842, 0x0008}, + cmdLutElement{0x0c, 0x00, -1, 0x03, 0x0842, 0x0009}, + cmdLutElement{0x0e, 0x00, -1, 0x00, 0x1842, 0x0002}, + cmdLutElement{0x0e, 0x00, -1, 0x01, 0x1842, 0x0003}, + cmdLutElement{0x0e, 0x00, -1, 0x02, 0x1842, 0x0004}, + cmdLutElement{0x0e, 0x00, -1, 0x03, 0x1842, 0x0005}, + cmdLutElement{0x0e, 0x00, -1, 0x03, 0x1842, 0x0006}, + cmdLutElement{0x0e, 0x00, -1, 0x03, 0x1842, 0x0007}, + cmdLutElement{0x0e, 0x00, -1, 0x03, 0x1842, 0x0008}, + cmdLutElement{0x0e, 0x00, -1, 0x03, 0x1842, 0x0009}, + cmdLutElement{0x18, 0x00, -1, 0x00, 0x5842, 0x0002}, + cmdLutElement{0x18, 0x00, -1, 0x01, 0x5842, 0x0003}, + cmdLutElement{0x18, 0x00, -1, 0x02, 0x5842, 0x0004}, + cmdLutElement{0x18, 0x00, -1, 0x03, 0x5842, 0x0005}, + cmdLutElement{0x18, 0x00, -1, 0x03, 0x5842, 0x0006}, + cmdLutElement{0x18, 0x00, -1, 0x03, 0x5842, 0x0007}, + cmdLutElement{0x18, 0x00, -1, 0x03, 0x5842, 0x0008}, + cmdLutElement{0x18, 0x00, -1, 0x03, 0x5842, 0x0009}, + cmdLutElement{0x02, 0x05, -1, 0x03, 0x000a, 0x0046}, + cmdLutElement{0x02, 0x05, -1, 0x03, 0x000a, 0x0066}, + cmdLutElement{0x02, 0x06, -1, 0x03, 0x000a, 0x0086}, + cmdLutElement{0x02, 0x07, -1, 0x03, 0x000a, 0x00c6}, + cmdLutElement{0x02, 0x08, -1, 0x03, 0x000a, 0x0146}, + cmdLutElement{0x02, 0x09, -1, 0x03, 0x000a, 0x0246}, + cmdLutElement{0x02, 0x0a, -1, 0x03, 0x000a, 0x0446}, + cmdLutElement{0x02, 0x18, -1, 0x03, 0x000a, 0x0846}, + cmdLutElement{0x02, 0x05, -1, 0x03, 0x000e, 0x0046}, + cmdLutElement{0x02, 0x05, -1, 0x03, 0x000e, 0x0066}, + cmdLutElement{0x02, 0x06, -1, 0x03, 0x000e, 0x0086}, + cmdLutElement{0x02, 0x07, -1, 0x03, 0x000e, 0x00c6}, + cmdLutElement{0x02, 0x08, -1, 0x03, 0x000e, 0x0146}, + cmdLutElement{0x02, 0x09, -1, 0x03, 0x000e, 0x0246}, + cmdLutElement{0x02, 0x0a, -1, 0x03, 0x000e, 0x0446}, + cmdLutElement{0x02, 0x18, -1, 0x03, 0x000e, 0x0846}, + cmdLutElement{0x03, 0x05, -1, 0x03, 0x0012, 0x0046}, + cmdLutElement{0x03, 0x05, -1, 0x03, 0x0012, 0x0066}, + cmdLutElement{0x03, 0x06, -1, 0x03, 0x0012, 0x0086}, + cmdLutElement{0x03, 0x07, -1, 0x03, 0x0012, 0x00c6}, + cmdLutElement{0x03, 0x08, -1, 0x03, 0x0012, 0x0146}, + cmdLutElement{0x03, 0x09, -1, 0x03, 0x0012, 0x0246}, + cmdLutElement{0x03, 0x0a, -1, 0x03, 0x0012, 0x0446}, + cmdLutElement{0x03, 0x18, -1, 0x03, 0x0012, 0x0846}, + cmdLutElement{0x03, 0x05, -1, 0x03, 0x001a, 0x0046}, + cmdLutElement{0x03, 0x05, -1, 0x03, 0x001a, 0x0066}, + cmdLutElement{0x03, 0x06, -1, 0x03, 0x001a, 0x0086}, + cmdLutElement{0x03, 0x07, -1, 0x03, 0x001a, 0x00c6}, + cmdLutElement{0x03, 0x08, -1, 0x03, 0x001a, 0x0146}, + cmdLutElement{0x03, 0x09, -1, 0x03, 0x001a, 0x0246}, + cmdLutElement{0x03, 0x0a, -1, 0x03, 0x001a, 0x0446}, + cmdLutElement{0x03, 0x18, -1, 0x03, 0x001a, 0x0846}, + cmdLutElement{0x04, 0x05, -1, 0x03, 0x0022, 0x0046}, + cmdLutElement{0x04, 0x05, -1, 0x03, 0x0022, 0x0066}, + cmdLutElement{0x04, 0x06, -1, 0x03, 0x0022, 0x0086}, + cmdLutElement{0x04, 0x07, -1, 0x03, 0x0022, 0x00c6}, + cmdLutElement{0x04, 0x08, -1, 0x03, 0x0022, 0x0146}, + cmdLutElement{0x04, 0x09, -1, 0x03, 0x0022, 0x0246}, + cmdLutElement{0x04, 0x0a, -1, 0x03, 0x0022, 0x0446}, + cmdLutElement{0x04, 0x18, -1, 0x03, 0x0022, 0x0846}, + cmdLutElement{0x04, 0x05, -1, 0x03, 0x0032, 0x0046}, + cmdLutElement{0x04, 0x05, -1, 0x03, 0x0032, 0x0066}, + cmdLutElement{0x04, 0x06, -1, 0x03, 0x0032, 0x0086}, + cmdLutElement{0x04, 0x07, -1, 0x03, 0x0032, 0x00c6}, + cmdLutElement{0x04, 0x08, -1, 0x03, 0x0032, 0x0146}, + cmdLutElement{0x04, 0x09, -1, 0x03, 0x0032, 0x0246}, + cmdLutElement{0x04, 0x0a, -1, 0x03, 0x0032, 0x0446}, + cmdLutElement{0x04, 0x18, -1, 0x03, 0x0032, 0x0846}, + cmdLutElement{0x05, 0x05, -1, 0x03, 0x0042, 0x0046}, + cmdLutElement{0x05, 0x05, -1, 0x03, 0x0042, 0x0066}, + cmdLutElement{0x05, 0x06, -1, 0x03, 0x0042, 0x0086}, + cmdLutElement{0x05, 0x07, -1, 0x03, 0x0042, 0x00c6}, + cmdLutElement{0x05, 0x08, -1, 0x03, 0x0042, 0x0146}, + cmdLutElement{0x05, 0x09, -1, 0x03, 0x0042, 0x0246}, + cmdLutElement{0x05, 0x0a, -1, 0x03, 0x0042, 0x0446}, + cmdLutElement{0x05, 0x18, -1, 0x03, 0x0042, 0x0846}, + cmdLutElement{0x05, 0x05, -1, 0x03, 0x0062, 0x0046}, + cmdLutElement{0x05, 0x05, -1, 0x03, 0x0062, 0x0066}, + cmdLutElement{0x05, 0x06, -1, 0x03, 0x0062, 0x0086}, + cmdLutElement{0x05, 0x07, -1, 0x03, 0x0062, 0x00c6}, + cmdLutElement{0x05, 0x08, -1, 0x03, 0x0062, 0x0146}, + cmdLutElement{0x05, 0x09, -1, 0x03, 0x0062, 0x0246}, + cmdLutElement{0x05, 0x0a, -1, 0x03, 0x0062, 0x0446}, + cmdLutElement{0x05, 0x18, -1, 0x03, 0x0062, 0x0846}, + cmdLutElement{0x06, 0x01, -1, 0x03, 0x0082, 0x000a}, + cmdLutElement{0x06, 0x01, -1, 0x03, 0x0082, 0x000c}, + cmdLutElement{0x06, 0x02, -1, 0x03, 0x0082, 0x000e}, + cmdLutElement{0x06, 0x02, -1, 0x03, 0x0082, 0x0012}, + cmdLutElement{0x06, 0x03, -1, 0x03, 0x0082, 0x0016}, + cmdLutElement{0x06, 0x03, -1, 0x03, 0x0082, 0x001e}, + cmdLutElement{0x06, 0x04, -1, 0x03, 0x0082, 0x0026}, + cmdLutElement{0x06, 0x04, -1, 0x03, 0x0082, 0x0036}, + cmdLutElement{0x07, 0x01, -1, 0x03, 0x00c2, 0x000a}, + cmdLutElement{0x07, 0x01, -1, 0x03, 0x00c2, 0x000c}, + cmdLutElement{0x07, 0x02, -1, 0x03, 0x00c2, 0x000e}, + cmdLutElement{0x07, 0x02, -1, 0x03, 0x00c2, 0x0012}, + cmdLutElement{0x07, 0x03, -1, 0x03, 0x00c2, 0x0016}, + cmdLutElement{0x07, 0x03, -1, 0x03, 0x00c2, 0x001e}, + cmdLutElement{0x07, 0x04, -1, 0x03, 0x00c2, 0x0026}, + cmdLutElement{0x07, 0x04, -1, 0x03, 0x00c2, 0x0036}, + cmdLutElement{0x08, 0x01, -1, 0x03, 0x0142, 0x000a}, + cmdLutElement{0x08, 0x01, -1, 0x03, 0x0142, 0x000c}, + cmdLutElement{0x08, 0x02, -1, 0x03, 0x0142, 0x000e}, + cmdLutElement{0x08, 0x02, -1, 0x03, 0x0142, 0x0012}, + cmdLutElement{0x08, 0x03, -1, 0x03, 0x0142, 0x0016}, + cmdLutElement{0x08, 0x03, -1, 0x03, 0x0142, 0x001e}, + cmdLutElement{0x08, 0x04, -1, 0x03, 0x0142, 0x0026}, + cmdLutElement{0x08, 0x04, -1, 0x03, 0x0142, 0x0036}, + cmdLutElement{0x09, 0x01, -1, 0x03, 0x0242, 0x000a}, + cmdLutElement{0x09, 0x01, -1, 0x03, 0x0242, 0x000c}, + cmdLutElement{0x09, 0x02, -1, 0x03, 0x0242, 0x000e}, + cmdLutElement{0x09, 0x02, -1, 0x03, 0x0242, 0x0012}, + cmdLutElement{0x09, 0x03, -1, 0x03, 0x0242, 0x0016}, + cmdLutElement{0x09, 0x03, -1, 0x03, 0x0242, 0x001e}, + cmdLutElement{0x09, 0x04, -1, 0x03, 0x0242, 0x0026}, + cmdLutElement{0x09, 0x04, -1, 0x03, 0x0242, 0x0036}, + cmdLutElement{0x0a, 0x01, -1, 0x03, 0x0442, 0x000a}, + cmdLutElement{0x0a, 0x01, -1, 0x03, 0x0442, 0x000c}, + cmdLutElement{0x0a, 0x02, -1, 0x03, 0x0442, 0x000e}, + cmdLutElement{0x0a, 0x02, -1, 0x03, 0x0442, 0x0012}, + cmdLutElement{0x0a, 0x03, -1, 0x03, 0x0442, 0x0016}, + cmdLutElement{0x0a, 0x03, -1, 0x03, 0x0442, 0x001e}, + cmdLutElement{0x0a, 0x04, -1, 0x03, 0x0442, 0x0026}, + cmdLutElement{0x0a, 0x04, -1, 0x03, 0x0442, 0x0036}, + cmdLutElement{0x0c, 0x01, -1, 0x03, 0x0842, 0x000a}, + cmdLutElement{0x0c, 0x01, -1, 0x03, 0x0842, 0x000c}, + cmdLutElement{0x0c, 0x02, -1, 0x03, 0x0842, 0x000e}, + cmdLutElement{0x0c, 0x02, -1, 0x03, 0x0842, 0x0012}, + cmdLutElement{0x0c, 0x03, -1, 0x03, 0x0842, 0x0016}, + cmdLutElement{0x0c, 0x03, -1, 0x03, 0x0842, 0x001e}, + cmdLutElement{0x0c, 0x04, -1, 0x03, 0x0842, 0x0026}, + cmdLutElement{0x0c, 0x04, -1, 0x03, 0x0842, 0x0036}, + cmdLutElement{0x0e, 0x01, -1, 0x03, 0x1842, 0x000a}, + cmdLutElement{0x0e, 0x01, -1, 0x03, 0x1842, 0x000c}, + cmdLutElement{0x0e, 0x02, -1, 0x03, 0x1842, 0x000e}, + cmdLutElement{0x0e, 0x02, -1, 0x03, 0x1842, 0x0012}, + cmdLutElement{0x0e, 0x03, -1, 0x03, 0x1842, 0x0016}, + cmdLutElement{0x0e, 0x03, -1, 0x03, 0x1842, 0x001e}, + cmdLutElement{0x0e, 0x04, -1, 0x03, 0x1842, 0x0026}, + cmdLutElement{0x0e, 0x04, -1, 0x03, 0x1842, 0x0036}, + cmdLutElement{0x18, 0x01, -1, 0x03, 0x5842, 0x000a}, + cmdLutElement{0x18, 0x01, -1, 0x03, 0x5842, 0x000c}, + cmdLutElement{0x18, 0x02, -1, 0x03, 0x5842, 0x000e}, + cmdLutElement{0x18, 0x02, -1, 0x03, 0x5842, 0x0012}, + cmdLutElement{0x18, 0x03, -1, 0x03, 0x5842, 0x0016}, + cmdLutElement{0x18, 0x03, -1, 0x03, 0x5842, 0x001e}, + cmdLutElement{0x18, 0x04, -1, 0x03, 0x5842, 0x0026}, + cmdLutElement{0x18, 0x04, -1, 0x03, 0x5842, 0x0036}, + cmdLutElement{0x06, 0x05, -1, 0x03, 0x0082, 0x0046}, + cmdLutElement{0x06, 0x05, -1, 0x03, 0x0082, 0x0066}, + cmdLutElement{0x06, 0x06, -1, 0x03, 0x0082, 0x0086}, + cmdLutElement{0x06, 0x07, -1, 0x03, 0x0082, 0x00c6}, + cmdLutElement{0x06, 0x08, -1, 0x03, 0x0082, 0x0146}, + cmdLutElement{0x06, 0x09, -1, 0x03, 0x0082, 0x0246}, + cmdLutElement{0x06, 0x0a, -1, 0x03, 0x0082, 0x0446}, + cmdLutElement{0x06, 0x18, -1, 0x03, 0x0082, 0x0846}, + cmdLutElement{0x07, 0x05, -1, 0x03, 0x00c2, 0x0046}, + cmdLutElement{0x07, 0x05, -1, 0x03, 0x00c2, 0x0066}, + cmdLutElement{0x07, 0x06, -1, 0x03, 0x00c2, 0x0086}, + cmdLutElement{0x07, 0x07, -1, 0x03, 0x00c2, 0x00c6}, + cmdLutElement{0x07, 0x08, -1, 0x03, 0x00c2, 0x0146}, + cmdLutElement{0x07, 0x09, -1, 0x03, 0x00c2, 0x0246}, + cmdLutElement{0x07, 0x0a, -1, 0x03, 0x00c2, 0x0446}, + cmdLutElement{0x07, 0x18, -1, 0x03, 0x00c2, 0x0846}, + cmdLutElement{0x08, 0x05, -1, 0x03, 0x0142, 0x0046}, + cmdLutElement{0x08, 0x05, -1, 0x03, 0x0142, 0x0066}, + cmdLutElement{0x08, 0x06, -1, 0x03, 0x0142, 0x0086}, + cmdLutElement{0x08, 0x07, -1, 0x03, 0x0142, 0x00c6}, + cmdLutElement{0x08, 0x08, -1, 0x03, 0x0142, 0x0146}, + cmdLutElement{0x08, 0x09, -1, 0x03, 0x0142, 0x0246}, + cmdLutElement{0x08, 0x0a, -1, 0x03, 0x0142, 0x0446}, + cmdLutElement{0x08, 0x18, -1, 0x03, 0x0142, 0x0846}, + cmdLutElement{0x09, 0x05, -1, 0x03, 0x0242, 0x0046}, + cmdLutElement{0x09, 0x05, -1, 0x03, 0x0242, 0x0066}, + cmdLutElement{0x09, 0x06, -1, 0x03, 0x0242, 0x0086}, + cmdLutElement{0x09, 0x07, -1, 0x03, 0x0242, 0x00c6}, + cmdLutElement{0x09, 0x08, -1, 0x03, 0x0242, 0x0146}, + cmdLutElement{0x09, 0x09, -1, 0x03, 0x0242, 0x0246}, + cmdLutElement{0x09, 0x0a, -1, 0x03, 0x0242, 0x0446}, + cmdLutElement{0x09, 0x18, -1, 0x03, 0x0242, 0x0846}, + cmdLutElement{0x0a, 0x05, -1, 0x03, 0x0442, 0x0046}, + cmdLutElement{0x0a, 0x05, -1, 0x03, 0x0442, 0x0066}, + cmdLutElement{0x0a, 0x06, -1, 0x03, 0x0442, 0x0086}, + cmdLutElement{0x0a, 0x07, -1, 0x03, 0x0442, 0x00c6}, + cmdLutElement{0x0a, 0x08, -1, 0x03, 0x0442, 0x0146}, + cmdLutElement{0x0a, 0x09, -1, 0x03, 0x0442, 0x0246}, + cmdLutElement{0x0a, 0x0a, -1, 0x03, 0x0442, 0x0446}, + cmdLutElement{0x0a, 0x18, -1, 0x03, 0x0442, 0x0846}, + cmdLutElement{0x0c, 0x05, -1, 0x03, 0x0842, 0x0046}, + cmdLutElement{0x0c, 0x05, -1, 0x03, 0x0842, 0x0066}, + cmdLutElement{0x0c, 0x06, -1, 0x03, 0x0842, 0x0086}, + cmdLutElement{0x0c, 0x07, -1, 0x03, 0x0842, 0x00c6}, + cmdLutElement{0x0c, 0x08, -1, 0x03, 0x0842, 0x0146}, + cmdLutElement{0x0c, 0x09, -1, 0x03, 0x0842, 0x0246}, + cmdLutElement{0x0c, 0x0a, -1, 0x03, 0x0842, 0x0446}, + cmdLutElement{0x0c, 0x18, -1, 0x03, 0x0842, 0x0846}, + cmdLutElement{0x0e, 0x05, -1, 0x03, 0x1842, 0x0046}, + cmdLutElement{0x0e, 0x05, -1, 0x03, 0x1842, 0x0066}, + cmdLutElement{0x0e, 0x06, -1, 0x03, 0x1842, 0x0086}, + cmdLutElement{0x0e, 0x07, -1, 0x03, 0x1842, 0x00c6}, + cmdLutElement{0x0e, 0x08, -1, 0x03, 0x1842, 0x0146}, + cmdLutElement{0x0e, 0x09, -1, 0x03, 0x1842, 0x0246}, + cmdLutElement{0x0e, 0x0a, -1, 0x03, 0x1842, 0x0446}, + cmdLutElement{0x0e, 0x18, -1, 0x03, 0x1842, 0x0846}, + cmdLutElement{0x18, 0x05, -1, 0x03, 0x5842, 0x0046}, + cmdLutElement{0x18, 0x05, -1, 0x03, 0x5842, 0x0066}, + cmdLutElement{0x18, 0x06, -1, 0x03, 0x5842, 0x0086}, + cmdLutElement{0x18, 0x07, -1, 0x03, 0x5842, 0x00c6}, + cmdLutElement{0x18, 0x08, -1, 0x03, 0x5842, 0x0146}, + cmdLutElement{0x18, 0x09, -1, 0x03, 0x5842, 0x0246}, + cmdLutElement{0x18, 0x0a, -1, 0x03, 0x5842, 0x0446}, + cmdLutElement{0x18, 0x18, -1, 0x03, 0x5842, 0x0846}, +} diff --git a/backend/vendor/github.com/andybalholm/brotli/quality.go b/backend/vendor/github.com/andybalholm/brotli/quality.go new file mode 100644 index 0000000..49709a3 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/quality.go @@ -0,0 +1,196 @@ +package brotli + +const fastOnePassCompressionQuality = 0 + +const fastTwoPassCompressionQuality = 1 + +const zopflificationQuality = 10 + +const hqZopflificationQuality = 11 + +const maxQualityForStaticEntropyCodes = 2 + +const minQualityForBlockSplit = 4 + +const minQualityForNonzeroDistanceParams = 4 + +const minQualityForOptimizeHistograms = 4 + +const minQualityForExtensiveReferenceSearch = 5 + +const minQualityForContextModeling = 5 + +const minQualityForHqContextModeling = 7 + +const minQualityForHqBlockSplitting = 10 + +/* For quality below MIN_QUALITY_FOR_BLOCK_SPLIT there is no block splitting, + so we buffer at most this much literals and commands. */ +const maxNumDelayedSymbols = 0x2FFF + +/* Returns hash-table size for quality levels 0 and 1. */ +func maxHashTableSize(quality int) uint { + if quality == fastOnePassCompressionQuality { + return 1 << 15 + } else { + return 1 << 17 + } +} + +/* The maximum length for which the zopflification uses distinct distances. */ +const maxZopfliLenQuality10 = 150 + +const maxZopfliLenQuality11 = 325 + +/* Do not thoroughly search when a long copy is found. */ +const longCopyQuickStep = 16384 + +func maxZopfliLen(params *encoderParams) uint { + if params.quality <= 10 { + return maxZopfliLenQuality10 + } else { + return maxZopfliLenQuality11 + } +} + +/* Number of best candidates to evaluate to expand Zopfli chain. */ +func maxZopfliCandidates(params *encoderParams) uint { + if params.quality <= 10 { + return 1 + } else { + return 5 + } +} + +func sanitizeParams(params *encoderParams) { + params.quality = brotli_min_int(maxQuality, brotli_max_int(minQuality, params.quality)) + if params.quality <= maxQualityForStaticEntropyCodes { + params.large_window = false + } + + if params.lgwin < minWindowBits { + params.lgwin = minWindowBits + } else { + var max_lgwin int + if params.large_window { + max_lgwin = largeMaxWindowBits + } else { + max_lgwin = maxWindowBits + } + if params.lgwin > uint(max_lgwin) { + params.lgwin = uint(max_lgwin) + } + } +} + +/* Returns optimized lg_block value. */ +func computeLgBlock(params *encoderParams) int { + var lgblock int = params.lgblock + if params.quality == fastOnePassCompressionQuality || params.quality == fastTwoPassCompressionQuality { + lgblock = int(params.lgwin) + } else if params.quality < minQualityForBlockSplit { + lgblock = 14 + } else if lgblock == 0 { + lgblock = 16 + if params.quality >= 9 && params.lgwin > uint(lgblock) { + lgblock = brotli_min_int(18, int(params.lgwin)) + } + } else { + lgblock = brotli_min_int(maxInputBlockBits, brotli_max_int(minInputBlockBits, lgblock)) + } + + return lgblock +} + +/* Returns log2 of the size of main ring buffer area. + Allocate at least lgwin + 1 bits for the ring buffer so that the newly + added block fits there completely and we still get lgwin bits and at least + read_block_size_bits + 1 bits because the copy tail length needs to be + smaller than ring-buffer size. */ +func computeRbBits(params *encoderParams) int { + return 1 + brotli_max_int(int(params.lgwin), params.lgblock) +} + +func maxMetablockSize(params *encoderParams) uint { + var bits int = brotli_min_int(computeRbBits(params), maxInputBlockBits) + return uint(1) << uint(bits) +} + +/* When searching for backward references and have not seen matches for a long + time, we can skip some match lookups. Unsuccessful match lookups are very + expensive and this kind of a heuristic speeds up compression quite a lot. + At first 8 byte strides are taken and every second byte is put to hasher. + After 4x more literals stride by 16 bytes, every put 4-th byte to hasher. + Applied only to qualities 2 to 9. */ +func literalSpreeLengthForSparseSearch(params *encoderParams) uint { + if params.quality < 9 { + return 64 + } else { + return 512 + } +} + +func chooseHasher(params *encoderParams, hparams *hasherParams) { + if params.quality > 9 { + hparams.type_ = 10 + } else if params.quality == 4 && params.size_hint >= 1<<20 { + hparams.type_ = 54 + } else if params.quality < 5 { + hparams.type_ = params.quality + } else if params.lgwin <= 16 { + if params.quality < 7 { + hparams.type_ = 40 + } else if params.quality < 9 { + hparams.type_ = 41 + } else { + hparams.type_ = 42 + } + } else if params.size_hint >= 1<<20 && params.lgwin >= 19 { + hparams.type_ = 6 + hparams.block_bits = params.quality - 1 + hparams.bucket_bits = 15 + hparams.hash_len = 5 + if params.quality < 7 { + hparams.num_last_distances_to_check = 4 + } else if params.quality < 9 { + hparams.num_last_distances_to_check = 10 + } else { + hparams.num_last_distances_to_check = 16 + } + } else { + hparams.type_ = 5 + hparams.block_bits = params.quality - 1 + if params.quality < 7 { + hparams.bucket_bits = 14 + } else { + hparams.bucket_bits = 15 + } + if params.quality < 7 { + hparams.num_last_distances_to_check = 4 + } else if params.quality < 9 { + hparams.num_last_distances_to_check = 10 + } else { + hparams.num_last_distances_to_check = 16 + } + } + + if params.lgwin > 24 { + /* Different hashers for large window brotli: not for qualities <= 2, + these are too fast for large window. Not for qualities >= 10: their + hasher already works well with large window. So the changes are: + H3 --> H35: for quality 3. + H54 --> H55: for quality 4 with size hint > 1MB + H6 --> H65: for qualities 5, 6, 7, 8, 9. */ + if hparams.type_ == 3 { + hparams.type_ = 35 + } + + if hparams.type_ == 54 { + hparams.type_ = 55 + } + + if hparams.type_ == 6 { + hparams.type_ = 65 + } + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/reader.go b/backend/vendor/github.com/andybalholm/brotli/reader.go new file mode 100644 index 0000000..3e22789 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/reader.go @@ -0,0 +1,111 @@ +package brotli + +import ( + "errors" + "io" +) + +type decodeError int + +func (err decodeError) Error() string { + return "brotli: " + string(decoderErrorString(int(err))) +} + +var errExcessiveInput = errors.New("brotli: excessive input") +var errInvalidState = errors.New("brotli: invalid state") + +// readBufSize is a "good" buffer size that avoids excessive round-trips +// between C and Go but doesn't waste too much memory on buffering. +// It is arbitrarily chosen to be equal to the constant used in io.Copy. +const readBufSize = 32 * 1024 + +// NewReader creates a new Reader reading the given reader. +func NewReader(src io.Reader) *Reader { + r := new(Reader) + r.Reset(src) + return r +} + +// Reset discards the Reader's state and makes it equivalent to the result of +// its original state from NewReader, but reading from src instead. +// This permits reusing a Reader rather than allocating a new one. +// Error is always nil +func (r *Reader) Reset(src io.Reader) error { + if r.error_code < 0 { + // There was an unrecoverable error, leaving the Reader's state + // undefined. Clear out everything but the buffer. + *r = Reader{buf: r.buf} + } + + decoderStateInit(r) + r.src = src + if r.buf == nil { + r.buf = make([]byte, readBufSize) + } + return nil +} + +func (r *Reader) Read(p []byte) (n int, err error) { + if !decoderHasMoreOutput(r) && len(r.in) == 0 { + m, readErr := r.src.Read(r.buf) + if m == 0 { + if readErr == io.EOF && r.state != stateDone { + readErr = io.ErrUnexpectedEOF + } + // If readErr is `nil`, we just proxy underlying stream behavior. + return 0, readErr + } + r.in = r.buf[:m] + } + + if len(p) == 0 { + return 0, nil + } + + for { + var written uint + in_len := uint(len(r.in)) + out_len := uint(len(p)) + in_remaining := in_len + out_remaining := out_len + result := decoderDecompressStream(r, &in_remaining, &r.in, &out_remaining, &p) + written = out_len - out_remaining + n = int(written) + + switch result { + case decoderResultSuccess: + if len(r.in) > 0 { + return n, errExcessiveInput + } + return n, nil + case decoderResultError: + return n, decodeError(decoderGetErrorCode(r)) + case decoderResultNeedsMoreOutput: + if n == 0 { + return 0, io.ErrShortBuffer + } + return n, nil + case decoderNeedsMoreInput: + } + + if len(r.in) != 0 { + return 0, errInvalidState + } + + // Calling r.src.Read may block. Don't block if we have data to return. + if n > 0 { + return n, nil + } + + // Top off the buffer. + encN, err := r.src.Read(r.buf) + if encN == 0 { + // Not enough data to complete decoding. + if err == io.EOF { + return 0, io.ErrUnexpectedEOF + } + return 0, err + } + r.in = r.buf[:encN] + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/ringbuffer.go b/backend/vendor/github.com/andybalholm/brotli/ringbuffer.go new file mode 100644 index 0000000..1c8f86f --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/ringbuffer.go @@ -0,0 +1,134 @@ +package brotli + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* A ringBuffer(window_bits, tail_bits) contains `1 << window_bits' bytes of + data in a circular manner: writing a byte writes it to: + `position() % (1 << window_bits)'. + For convenience, the ringBuffer array contains another copy of the + first `1 << tail_bits' bytes: + buffer_[i] == buffer_[i + (1 << window_bits)], if i < (1 << tail_bits), + and another copy of the last two bytes: + buffer_[-1] == buffer_[(1 << window_bits) - 1] and + buffer_[-2] == buffer_[(1 << window_bits) - 2]. */ +type ringBuffer struct { + size_ uint32 + mask_ uint32 + tail_size_ uint32 + total_size_ uint32 + cur_size_ uint32 + pos_ uint32 + data_ []byte + buffer_ []byte +} + +func ringBufferInit(rb *ringBuffer) { + rb.pos_ = 0 +} + +func ringBufferSetup(params *encoderParams, rb *ringBuffer) { + var window_bits int = computeRbBits(params) + var tail_bits int = params.lgblock + *(*uint32)(&rb.size_) = 1 << uint(window_bits) + *(*uint32)(&rb.mask_) = (1 << uint(window_bits)) - 1 + *(*uint32)(&rb.tail_size_) = 1 << uint(tail_bits) + *(*uint32)(&rb.total_size_) = rb.size_ + rb.tail_size_ +} + +const kSlackForEightByteHashingEverywhere uint = 7 + +/* Allocates or re-allocates data_ to the given length + plus some slack + region before and after. Fills the slack regions with zeros. */ +func ringBufferInitBuffer(buflen uint32, rb *ringBuffer) { + var new_data []byte + var i uint + size := 2 + int(buflen) + int(kSlackForEightByteHashingEverywhere) + if cap(rb.data_) < size { + new_data = make([]byte, size) + } else { + new_data = rb.data_[:size] + } + if rb.data_ != nil { + copy(new_data, rb.data_[:2+rb.cur_size_+uint32(kSlackForEightByteHashingEverywhere)]) + } + + rb.data_ = new_data + rb.cur_size_ = buflen + rb.buffer_ = rb.data_[2:] + rb.data_[1] = 0 + rb.data_[0] = rb.data_[1] + for i = 0; i < kSlackForEightByteHashingEverywhere; i++ { + rb.buffer_[rb.cur_size_+uint32(i)] = 0 + } +} + +func ringBufferWriteTail(bytes []byte, n uint, rb *ringBuffer) { + var masked_pos uint = uint(rb.pos_ & rb.mask_) + if uint32(masked_pos) < rb.tail_size_ { + /* Just fill the tail buffer with the beginning data. */ + var p uint = uint(rb.size_ + uint32(masked_pos)) + copy(rb.buffer_[p:], bytes[:brotli_min_size_t(n, uint(rb.tail_size_-uint32(masked_pos)))]) + } +} + +/* Push bytes into the ring buffer. */ +func ringBufferWrite(bytes []byte, n uint, rb *ringBuffer) { + if rb.pos_ == 0 && uint32(n) < rb.tail_size_ { + /* Special case for the first write: to process the first block, we don't + need to allocate the whole ring-buffer and we don't need the tail + either. However, we do this memory usage optimization only if the + first write is less than the tail size, which is also the input block + size, otherwise it is likely that other blocks will follow and we + will need to reallocate to the full size anyway. */ + rb.pos_ = uint32(n) + + ringBufferInitBuffer(rb.pos_, rb) + copy(rb.buffer_, bytes[:n]) + return + } + + if rb.cur_size_ < rb.total_size_ { + /* Lazily allocate the full buffer. */ + ringBufferInitBuffer(rb.total_size_, rb) + + /* Initialize the last two bytes to zero, so that we don't have to worry + later when we copy the last two bytes to the first two positions. */ + rb.buffer_[rb.size_-2] = 0 + + rb.buffer_[rb.size_-1] = 0 + } + { + var masked_pos uint = uint(rb.pos_ & rb.mask_) + + /* The length of the writes is limited so that we do not need to worry + about a write */ + ringBufferWriteTail(bytes, n, rb) + + if uint32(masked_pos+n) <= rb.size_ { + /* A single write fits. */ + copy(rb.buffer_[masked_pos:], bytes[:n]) + } else { + /* Split into two writes. + Copy into the end of the buffer, including the tail buffer. */ + copy(rb.buffer_[masked_pos:], bytes[:brotli_min_size_t(n, uint(rb.total_size_-uint32(masked_pos)))]) + + /* Copy into the beginning of the buffer */ + copy(rb.buffer_, bytes[rb.size_-uint32(masked_pos):][:uint32(n)-(rb.size_-uint32(masked_pos))]) + } + } + { + var not_first_lap bool = rb.pos_&(1<<31) != 0 + var rb_pos_mask uint32 = (1 << 31) - 1 + rb.data_[0] = rb.buffer_[rb.size_-2] + rb.data_[1] = rb.buffer_[rb.size_-1] + rb.pos_ = (rb.pos_ & rb_pos_mask) + uint32(uint32(n)&rb_pos_mask) + if not_first_lap { + /* Wrap, but preserve not-a-first-lap feature. */ + rb.pos_ |= 1 << 31 + } + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/state.go b/backend/vendor/github.com/andybalholm/brotli/state.go new file mode 100644 index 0000000..38d753e --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/state.go @@ -0,0 +1,294 @@ +package brotli + +import "io" + +/* Copyright 2015 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Brotli state for partial streaming decoding. */ +const ( + stateUninited = iota + stateLargeWindowBits + stateInitialize + stateMetablockBegin + stateMetablockHeader + stateMetablockHeader2 + stateContextModes + stateCommandBegin + stateCommandInner + stateCommandPostDecodeLiterals + stateCommandPostWrapCopy + stateUncompressed + stateMetadata + stateCommandInnerWrite + stateMetablockDone + stateCommandPostWrite1 + stateCommandPostWrite2 + stateHuffmanCode0 + stateHuffmanCode1 + stateHuffmanCode2 + stateHuffmanCode3 + stateContextMap1 + stateContextMap2 + stateTreeGroup + stateDone +) + +const ( + stateMetablockHeaderNone = iota + stateMetablockHeaderEmpty + stateMetablockHeaderNibbles + stateMetablockHeaderSize + stateMetablockHeaderUncompressed + stateMetablockHeaderReserved + stateMetablockHeaderBytes + stateMetablockHeaderMetadata +) + +const ( + stateUncompressedNone = iota + stateUncompressedWrite +) + +const ( + stateTreeGroupNone = iota + stateTreeGroupLoop +) + +const ( + stateContextMapNone = iota + stateContextMapReadPrefix + stateContextMapHuffman + stateContextMapDecode + stateContextMapTransform +) + +const ( + stateHuffmanNone = iota + stateHuffmanSimpleSize + stateHuffmanSimpleRead + stateHuffmanSimpleBuild + stateHuffmanComplex + stateHuffmanLengthSymbols +) + +const ( + stateDecodeUint8None = iota + stateDecodeUint8Short + stateDecodeUint8Long +) + +const ( + stateReadBlockLengthNone = iota + stateReadBlockLengthSuffix +) + +type Reader struct { + src io.Reader + buf []byte // scratch space for reading from src + in []byte // current chunk to decode; usually aliases buf + + state int + loop_counter int + br bitReader + buffer struct { + u64 uint64 + u8 [8]byte + } + buffer_length uint32 + pos int + max_backward_distance int + max_distance int + ringbuffer_size int + ringbuffer_mask int + dist_rb_idx int + dist_rb [4]int + error_code int + sub_loop_counter uint32 + ringbuffer []byte + ringbuffer_end []byte + htree_command []huffmanCode + context_lookup []byte + context_map_slice []byte + dist_context_map_slice []byte + literal_hgroup huffmanTreeGroup + insert_copy_hgroup huffmanTreeGroup + distance_hgroup huffmanTreeGroup + block_type_trees []huffmanCode + block_len_trees []huffmanCode + trivial_literal_context int + distance_context int + meta_block_remaining_len int + block_length_index uint32 + block_length [3]uint32 + num_block_types [3]uint32 + block_type_rb [6]uint32 + distance_postfix_bits uint32 + num_direct_distance_codes uint32 + distance_postfix_mask int + num_dist_htrees uint32 + dist_context_map []byte + literal_htree []huffmanCode + dist_htree_index byte + repeat_code_len uint32 + prev_code_len uint32 + copy_length int + distance_code int + rb_roundtrips uint + partial_pos_out uint + symbol uint32 + repeat uint32 + space uint32 + table [32]huffmanCode + symbol_lists symbolList + symbols_lists_array [huffmanMaxCodeLength + 1 + numCommandSymbols]uint16 + next_symbol [32]int + code_length_code_lengths [codeLengthCodes]byte + code_length_histo [16]uint16 + htree_index int + next []huffmanCode + context_index uint32 + max_run_length_prefix uint32 + code uint32 + context_map_table [huffmanMaxSize272]huffmanCode + substate_metablock_header int + substate_tree_group int + substate_context_map int + substate_uncompressed int + substate_huffman int + substate_decode_uint8 int + substate_read_block_length int + is_last_metablock uint + is_uncompressed uint + is_metadata uint + should_wrap_ringbuffer uint + canny_ringbuffer_allocation uint + large_window bool + size_nibbles uint + window_bits uint32 + new_ringbuffer_size int + num_literal_htrees uint32 + context_map []byte + context_modes []byte + dictionary *dictionary + transforms *transforms + trivial_literal_contexts [8]uint32 +} + +func decoderStateInit(s *Reader) bool { + s.error_code = 0 /* BROTLI_DECODER_NO_ERROR */ + + initBitReader(&s.br) + s.state = stateUninited + s.large_window = false + s.substate_metablock_header = stateMetablockHeaderNone + s.substate_tree_group = stateTreeGroupNone + s.substate_context_map = stateContextMapNone + s.substate_uncompressed = stateUncompressedNone + s.substate_huffman = stateHuffmanNone + s.substate_decode_uint8 = stateDecodeUint8None + s.substate_read_block_length = stateReadBlockLengthNone + + s.buffer_length = 0 + s.loop_counter = 0 + s.pos = 0 + s.rb_roundtrips = 0 + s.partial_pos_out = 0 + + s.block_type_trees = nil + s.block_len_trees = nil + s.ringbuffer_size = 0 + s.new_ringbuffer_size = 0 + s.ringbuffer_mask = 0 + + s.context_map = nil + s.context_modes = nil + s.dist_context_map = nil + s.context_map_slice = nil + s.dist_context_map_slice = nil + + s.sub_loop_counter = 0 + + s.literal_hgroup.codes = nil + s.literal_hgroup.htrees = nil + s.insert_copy_hgroup.codes = nil + s.insert_copy_hgroup.htrees = nil + s.distance_hgroup.codes = nil + s.distance_hgroup.htrees = nil + + s.is_last_metablock = 0 + s.is_uncompressed = 0 + s.is_metadata = 0 + s.should_wrap_ringbuffer = 0 + s.canny_ringbuffer_allocation = 1 + + s.window_bits = 0 + s.max_distance = 0 + s.dist_rb[0] = 16 + s.dist_rb[1] = 15 + s.dist_rb[2] = 11 + s.dist_rb[3] = 4 + s.dist_rb_idx = 0 + s.block_type_trees = nil + s.block_len_trees = nil + + s.symbol_lists.storage = s.symbols_lists_array[:] + s.symbol_lists.offset = huffmanMaxCodeLength + 1 + + s.dictionary = getDictionary() + s.transforms = getTransforms() + + return true +} + +func decoderStateMetablockBegin(s *Reader) { + s.meta_block_remaining_len = 0 + s.block_length[0] = 1 << 24 + s.block_length[1] = 1 << 24 + s.block_length[2] = 1 << 24 + s.num_block_types[0] = 1 + s.num_block_types[1] = 1 + s.num_block_types[2] = 1 + s.block_type_rb[0] = 1 + s.block_type_rb[1] = 0 + s.block_type_rb[2] = 1 + s.block_type_rb[3] = 0 + s.block_type_rb[4] = 1 + s.block_type_rb[5] = 0 + s.context_map = nil + s.context_modes = nil + s.dist_context_map = nil + s.context_map_slice = nil + s.literal_htree = nil + s.dist_context_map_slice = nil + s.dist_htree_index = 0 + s.context_lookup = nil + s.literal_hgroup.codes = nil + s.literal_hgroup.htrees = nil + s.insert_copy_hgroup.codes = nil + s.insert_copy_hgroup.htrees = nil + s.distance_hgroup.codes = nil + s.distance_hgroup.htrees = nil +} + +func decoderStateCleanupAfterMetablock(s *Reader) { + s.context_modes = nil + s.context_map = nil + s.dist_context_map = nil + s.literal_hgroup.htrees = nil + s.insert_copy_hgroup.htrees = nil + s.distance_hgroup.htrees = nil +} + +func decoderHuffmanTreeGroupInit(s *Reader, group *huffmanTreeGroup, alphabet_size uint32, max_symbol uint32, ntrees uint32) bool { + var max_table_size uint = uint(kMaxHuffmanTableSize[(alphabet_size+31)>>5]) + group.alphabet_size = uint16(alphabet_size) + group.max_symbol = uint16(max_symbol) + group.num_htrees = uint16(ntrees) + group.htrees = make([][]huffmanCode, ntrees) + group.codes = make([]huffmanCode, (uint(ntrees) * max_table_size)) + return !(group.codes == nil) +} diff --git a/backend/vendor/github.com/andybalholm/brotli/static_dict.go b/backend/vendor/github.com/andybalholm/brotli/static_dict.go new file mode 100644 index 0000000..bc05566 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/static_dict.go @@ -0,0 +1,662 @@ +package brotli + +import "encoding/binary" + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Class to model the static dictionary. */ + +const maxStaticDictionaryMatchLen = 37 + +const kInvalidMatch uint32 = 0xFFFFFFF + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ +func hash(data []byte) uint32 { + var h uint32 = binary.LittleEndian.Uint32(data) * kDictHashMul32 + + /* The higher bits contain more mixture from the multiplication, + so we take our results from there. */ + return h >> uint(32-kDictNumBits) +} + +func addMatch(distance uint, len uint, len_code uint, matches []uint32) { + var match uint32 = uint32((distance << 5) + len_code) + matches[len] = brotli_min_uint32_t(matches[len], match) +} + +func dictMatchLength(dict *dictionary, data []byte, id uint, len uint, maxlen uint) uint { + var offset uint = uint(dict.offsets_by_length[len]) + len*id + return findMatchLengthWithLimit(dict.data[offset:], data, brotli_min_size_t(uint(len), maxlen)) +} + +func isMatch(d *dictionary, w dictWord, data []byte, max_length uint) bool { + if uint(w.len) > max_length { + return false + } else { + var offset uint = uint(d.offsets_by_length[w.len]) + uint(w.len)*uint(w.idx) + var dict []byte = d.data[offset:] + if w.transform == 0 { + /* Match against base dictionary word. */ + return findMatchLengthWithLimit(dict, data, uint(w.len)) == uint(w.len) + } else if w.transform == 10 { + /* Match against uppercase first transform. + Note that there are only ASCII uppercase words in the lookup table. */ + return dict[0] >= 'a' && dict[0] <= 'z' && (dict[0]^32) == data[0] && findMatchLengthWithLimit(dict[1:], data[1:], uint(w.len)-1) == uint(w.len-1) + } else { + /* Match against uppercase all transform. + Note that there are only ASCII uppercase words in the lookup table. */ + var i uint + for i = 0; i < uint(w.len); i++ { + if dict[i] >= 'a' && dict[i] <= 'z' { + if (dict[i] ^ 32) != data[i] { + return false + } + } else { + if dict[i] != data[i] { + return false + } + } + } + + return true + } + } +} + +func findAllStaticDictionaryMatches(dict *encoderDictionary, data []byte, min_length uint, max_length uint, matches []uint32) bool { + var has_found_match bool = false + { + var offset uint = uint(dict.buckets[hash(data)]) + var end bool = offset == 0 + for !end { + w := dict.dict_words[offset] + offset++ + var l uint = uint(w.len) & 0x1F + var n uint = uint(1) << dict.words.size_bits_by_length[l] + var id uint = uint(w.idx) + end = !(w.len&0x80 == 0) + w.len = byte(l) + if w.transform == 0 { + var matchlen uint = dictMatchLength(dict.words, data, id, l, max_length) + var s []byte + var minlen uint + var maxlen uint + var len uint + + /* Transform "" + BROTLI_TRANSFORM_IDENTITY + "" */ + if matchlen == l { + addMatch(id, l, l, matches) + has_found_match = true + } + + /* Transforms "" + BROTLI_TRANSFORM_OMIT_LAST_1 + "" and + "" + BROTLI_TRANSFORM_OMIT_LAST_1 + "ing " */ + if matchlen >= l-1 { + addMatch(id+12*n, l-1, l, matches) + if l+2 < max_length && data[l-1] == 'i' && data[l] == 'n' && data[l+1] == 'g' && data[l+2] == ' ' { + addMatch(id+49*n, l+3, l, matches) + } + + has_found_match = true + } + + /* Transform "" + BROTLI_TRANSFORM_OMIT_LAST_# + "" (# = 2 .. 9) */ + minlen = min_length + + if l > 9 { + minlen = brotli_max_size_t(minlen, l-9) + } + maxlen = brotli_min_size_t(matchlen, l-2) + for len = minlen; len <= maxlen; len++ { + var cut uint = l - len + var transform_id uint = (cut << 2) + uint((dict.cutoffTransforms>>(cut*6))&0x3F) + addMatch(id+transform_id*n, uint(len), l, matches) + has_found_match = true + } + + if matchlen < l || l+6 >= max_length { + continue + } + + s = data[l:] + + /* Transforms "" + BROTLI_TRANSFORM_IDENTITY + */ + if s[0] == ' ' { + addMatch(id+n, l+1, l, matches) + if s[1] == 'a' { + if s[2] == ' ' { + addMatch(id+28*n, l+3, l, matches) + } else if s[2] == 's' { + if s[3] == ' ' { + addMatch(id+46*n, l+4, l, matches) + } + } else if s[2] == 't' { + if s[3] == ' ' { + addMatch(id+60*n, l+4, l, matches) + } + } else if s[2] == 'n' { + if s[3] == 'd' && s[4] == ' ' { + addMatch(id+10*n, l+5, l, matches) + } + } + } else if s[1] == 'b' { + if s[2] == 'y' && s[3] == ' ' { + addMatch(id+38*n, l+4, l, matches) + } + } else if s[1] == 'i' { + if s[2] == 'n' { + if s[3] == ' ' { + addMatch(id+16*n, l+4, l, matches) + } + } else if s[2] == 's' { + if s[3] == ' ' { + addMatch(id+47*n, l+4, l, matches) + } + } + } else if s[1] == 'f' { + if s[2] == 'o' { + if s[3] == 'r' && s[4] == ' ' { + addMatch(id+25*n, l+5, l, matches) + } + } else if s[2] == 'r' { + if s[3] == 'o' && s[4] == 'm' && s[5] == ' ' { + addMatch(id+37*n, l+6, l, matches) + } + } + } else if s[1] == 'o' { + if s[2] == 'f' { + if s[3] == ' ' { + addMatch(id+8*n, l+4, l, matches) + } + } else if s[2] == 'n' { + if s[3] == ' ' { + addMatch(id+45*n, l+4, l, matches) + } + } + } else if s[1] == 'n' { + if s[2] == 'o' && s[3] == 't' && s[4] == ' ' { + addMatch(id+80*n, l+5, l, matches) + } + } else if s[1] == 't' { + if s[2] == 'h' { + if s[3] == 'e' { + if s[4] == ' ' { + addMatch(id+5*n, l+5, l, matches) + } + } else if s[3] == 'a' { + if s[4] == 't' && s[5] == ' ' { + addMatch(id+29*n, l+6, l, matches) + } + } + } else if s[2] == 'o' { + if s[3] == ' ' { + addMatch(id+17*n, l+4, l, matches) + } + } + } else if s[1] == 'w' { + if s[2] == 'i' && s[3] == 't' && s[4] == 'h' && s[5] == ' ' { + addMatch(id+35*n, l+6, l, matches) + } + } + } else if s[0] == '"' { + addMatch(id+19*n, l+1, l, matches) + if s[1] == '>' { + addMatch(id+21*n, l+2, l, matches) + } + } else if s[0] == '.' { + addMatch(id+20*n, l+1, l, matches) + if s[1] == ' ' { + addMatch(id+31*n, l+2, l, matches) + if s[2] == 'T' && s[3] == 'h' { + if s[4] == 'e' { + if s[5] == ' ' { + addMatch(id+43*n, l+6, l, matches) + } + } else if s[4] == 'i' { + if s[5] == 's' && s[6] == ' ' { + addMatch(id+75*n, l+7, l, matches) + } + } + } + } + } else if s[0] == ',' { + addMatch(id+76*n, l+1, l, matches) + if s[1] == ' ' { + addMatch(id+14*n, l+2, l, matches) + } + } else if s[0] == '\n' { + addMatch(id+22*n, l+1, l, matches) + if s[1] == '\t' { + addMatch(id+50*n, l+2, l, matches) + } + } else if s[0] == ']' { + addMatch(id+24*n, l+1, l, matches) + } else if s[0] == '\'' { + addMatch(id+36*n, l+1, l, matches) + } else if s[0] == ':' { + addMatch(id+51*n, l+1, l, matches) + } else if s[0] == '(' { + addMatch(id+57*n, l+1, l, matches) + } else if s[0] == '=' { + if s[1] == '"' { + addMatch(id+70*n, l+2, l, matches) + } else if s[1] == '\'' { + addMatch(id+86*n, l+2, l, matches) + } + } else if s[0] == 'a' { + if s[1] == 'l' && s[2] == ' ' { + addMatch(id+84*n, l+3, l, matches) + } + } else if s[0] == 'e' { + if s[1] == 'd' { + if s[2] == ' ' { + addMatch(id+53*n, l+3, l, matches) + } + } else if s[1] == 'r' { + if s[2] == ' ' { + addMatch(id+82*n, l+3, l, matches) + } + } else if s[1] == 's' { + if s[2] == 't' && s[3] == ' ' { + addMatch(id+95*n, l+4, l, matches) + } + } + } else if s[0] == 'f' { + if s[1] == 'u' && s[2] == 'l' && s[3] == ' ' { + addMatch(id+90*n, l+4, l, matches) + } + } else if s[0] == 'i' { + if s[1] == 'v' { + if s[2] == 'e' && s[3] == ' ' { + addMatch(id+92*n, l+4, l, matches) + } + } else if s[1] == 'z' { + if s[2] == 'e' && s[3] == ' ' { + addMatch(id+100*n, l+4, l, matches) + } + } + } else if s[0] == 'l' { + if s[1] == 'e' { + if s[2] == 's' && s[3] == 's' && s[4] == ' ' { + addMatch(id+93*n, l+5, l, matches) + } + } else if s[1] == 'y' { + if s[2] == ' ' { + addMatch(id+61*n, l+3, l, matches) + } + } + } else if s[0] == 'o' { + if s[1] == 'u' && s[2] == 's' && s[3] == ' ' { + addMatch(id+106*n, l+4, l, matches) + } + } + } else { + var is_all_caps bool = (w.transform != transformUppercaseFirst) + /* Set is_all_caps=0 for BROTLI_TRANSFORM_UPPERCASE_FIRST and + is_all_caps=1 otherwise (BROTLI_TRANSFORM_UPPERCASE_ALL) + transform. */ + + var s []byte + if !isMatch(dict.words, w, data, max_length) { + continue + } + + /* Transform "" + kUppercase{First,All} + "" */ + var tmp int + if is_all_caps { + tmp = 44 + } else { + tmp = 9 + } + addMatch(id+uint(tmp)*n, l, l, matches) + + has_found_match = true + if l+1 >= max_length { + continue + } + + /* Transforms "" + kUppercase{First,All} + */ + s = data[l:] + + if s[0] == ' ' { + var tmp int + if is_all_caps { + tmp = 68 + } else { + tmp = 4 + } + addMatch(id+uint(tmp)*n, l+1, l, matches) + } else if s[0] == '"' { + var tmp int + if is_all_caps { + tmp = 87 + } else { + tmp = 66 + } + addMatch(id+uint(tmp)*n, l+1, l, matches) + if s[1] == '>' { + var tmp int + if is_all_caps { + tmp = 97 + } else { + tmp = 69 + } + addMatch(id+uint(tmp)*n, l+2, l, matches) + } + } else if s[0] == '.' { + var tmp int + if is_all_caps { + tmp = 101 + } else { + tmp = 79 + } + addMatch(id+uint(tmp)*n, l+1, l, matches) + if s[1] == ' ' { + var tmp int + if is_all_caps { + tmp = 114 + } else { + tmp = 88 + } + addMatch(id+uint(tmp)*n, l+2, l, matches) + } + } else if s[0] == ',' { + var tmp int + if is_all_caps { + tmp = 112 + } else { + tmp = 99 + } + addMatch(id+uint(tmp)*n, l+1, l, matches) + if s[1] == ' ' { + var tmp int + if is_all_caps { + tmp = 107 + } else { + tmp = 58 + } + addMatch(id+uint(tmp)*n, l+2, l, matches) + } + } else if s[0] == '\'' { + var tmp int + if is_all_caps { + tmp = 94 + } else { + tmp = 74 + } + addMatch(id+uint(tmp)*n, l+1, l, matches) + } else if s[0] == '(' { + var tmp int + if is_all_caps { + tmp = 113 + } else { + tmp = 78 + } + addMatch(id+uint(tmp)*n, l+1, l, matches) + } else if s[0] == '=' { + if s[1] == '"' { + var tmp int + if is_all_caps { + tmp = 105 + } else { + tmp = 104 + } + addMatch(id+uint(tmp)*n, l+2, l, matches) + } else if s[1] == '\'' { + var tmp int + if is_all_caps { + tmp = 116 + } else { + tmp = 108 + } + addMatch(id+uint(tmp)*n, l+2, l, matches) + } + } + } + } + } + + /* Transforms with prefixes " " and "." */ + if max_length >= 5 && (data[0] == ' ' || data[0] == '.') { + var is_space bool = (data[0] == ' ') + var offset uint = uint(dict.buckets[hash(data[1:])]) + var end bool = offset == 0 + for !end { + w := dict.dict_words[offset] + offset++ + var l uint = uint(w.len) & 0x1F + var n uint = uint(1) << dict.words.size_bits_by_length[l] + var id uint = uint(w.idx) + end = !(w.len&0x80 == 0) + w.len = byte(l) + if w.transform == 0 { + var s []byte + if !isMatch(dict.words, w, data[1:], max_length-1) { + continue + } + + /* Transforms " " + BROTLI_TRANSFORM_IDENTITY + "" and + "." + BROTLI_TRANSFORM_IDENTITY + "" */ + var tmp int + if is_space { + tmp = 6 + } else { + tmp = 32 + } + addMatch(id+uint(tmp)*n, l+1, l, matches) + + has_found_match = true + if l+2 >= max_length { + continue + } + + /* Transforms " " + BROTLI_TRANSFORM_IDENTITY + and + "." + BROTLI_TRANSFORM_IDENTITY + + */ + s = data[l+1:] + + if s[0] == ' ' { + var tmp int + if is_space { + tmp = 2 + } else { + tmp = 77 + } + addMatch(id+uint(tmp)*n, l+2, l, matches) + } else if s[0] == '(' { + var tmp int + if is_space { + tmp = 89 + } else { + tmp = 67 + } + addMatch(id+uint(tmp)*n, l+2, l, matches) + } else if is_space { + if s[0] == ',' { + addMatch(id+103*n, l+2, l, matches) + if s[1] == ' ' { + addMatch(id+33*n, l+3, l, matches) + } + } else if s[0] == '.' { + addMatch(id+71*n, l+2, l, matches) + if s[1] == ' ' { + addMatch(id+52*n, l+3, l, matches) + } + } else if s[0] == '=' { + if s[1] == '"' { + addMatch(id+81*n, l+3, l, matches) + } else if s[1] == '\'' { + addMatch(id+98*n, l+3, l, matches) + } + } + } + } else if is_space { + var is_all_caps bool = (w.transform != transformUppercaseFirst) + /* Set is_all_caps=0 for BROTLI_TRANSFORM_UPPERCASE_FIRST and + is_all_caps=1 otherwise (BROTLI_TRANSFORM_UPPERCASE_ALL) + transform. */ + + var s []byte + if !isMatch(dict.words, w, data[1:], max_length-1) { + continue + } + + /* Transforms " " + kUppercase{First,All} + "" */ + var tmp int + if is_all_caps { + tmp = 85 + } else { + tmp = 30 + } + addMatch(id+uint(tmp)*n, l+1, l, matches) + + has_found_match = true + if l+2 >= max_length { + continue + } + + /* Transforms " " + kUppercase{First,All} + */ + s = data[l+1:] + + if s[0] == ' ' { + var tmp int + if is_all_caps { + tmp = 83 + } else { + tmp = 15 + } + addMatch(id+uint(tmp)*n, l+2, l, matches) + } else if s[0] == ',' { + if !is_all_caps { + addMatch(id+109*n, l+2, l, matches) + } + + if s[1] == ' ' { + var tmp int + if is_all_caps { + tmp = 111 + } else { + tmp = 65 + } + addMatch(id+uint(tmp)*n, l+3, l, matches) + } + } else if s[0] == '.' { + var tmp int + if is_all_caps { + tmp = 115 + } else { + tmp = 96 + } + addMatch(id+uint(tmp)*n, l+2, l, matches) + if s[1] == ' ' { + var tmp int + if is_all_caps { + tmp = 117 + } else { + tmp = 91 + } + addMatch(id+uint(tmp)*n, l+3, l, matches) + } + } else if s[0] == '=' { + if s[1] == '"' { + var tmp int + if is_all_caps { + tmp = 110 + } else { + tmp = 118 + } + addMatch(id+uint(tmp)*n, l+3, l, matches) + } else if s[1] == '\'' { + var tmp int + if is_all_caps { + tmp = 119 + } else { + tmp = 120 + } + addMatch(id+uint(tmp)*n, l+3, l, matches) + } + } + } + } + } + + if max_length >= 6 { + /* Transforms with prefixes "e ", "s ", ", " and "\xC2\xA0" */ + if (data[1] == ' ' && (data[0] == 'e' || data[0] == 's' || data[0] == ',')) || (data[0] == 0xC2 && data[1] == 0xA0) { + var offset uint = uint(dict.buckets[hash(data[2:])]) + var end bool = offset == 0 + for !end { + w := dict.dict_words[offset] + offset++ + var l uint = uint(w.len) & 0x1F + var n uint = uint(1) << dict.words.size_bits_by_length[l] + var id uint = uint(w.idx) + end = !(w.len&0x80 == 0) + w.len = byte(l) + if w.transform == 0 && isMatch(dict.words, w, data[2:], max_length-2) { + if data[0] == 0xC2 { + addMatch(id+102*n, l+2, l, matches) + has_found_match = true + } else if l+2 < max_length && data[l+2] == ' ' { + var t uint = 13 + if data[0] == 'e' { + t = 18 + } else if data[0] == 's' { + t = 7 + } + addMatch(id+t*n, l+3, l, matches) + has_found_match = true + } + } + } + } + } + + if max_length >= 9 { + /* Transforms with prefixes " the " and ".com/" */ + if (data[0] == ' ' && data[1] == 't' && data[2] == 'h' && data[3] == 'e' && data[4] == ' ') || (data[0] == '.' && data[1] == 'c' && data[2] == 'o' && data[3] == 'm' && data[4] == '/') { + var offset uint = uint(dict.buckets[hash(data[5:])]) + var end bool = offset == 0 + for !end { + w := dict.dict_words[offset] + offset++ + var l uint = uint(w.len) & 0x1F + var n uint = uint(1) << dict.words.size_bits_by_length[l] + var id uint = uint(w.idx) + end = !(w.len&0x80 == 0) + w.len = byte(l) + if w.transform == 0 && isMatch(dict.words, w, data[5:], max_length-5) { + var tmp int + if data[0] == ' ' { + tmp = 41 + } else { + tmp = 72 + } + addMatch(id+uint(tmp)*n, l+5, l, matches) + has_found_match = true + if l+5 < max_length { + var s []byte = data[l+5:] + if data[0] == ' ' { + if l+8 < max_length && s[0] == ' ' && s[1] == 'o' && s[2] == 'f' && s[3] == ' ' { + addMatch(id+62*n, l+9, l, matches) + if l+12 < max_length && s[4] == 't' && s[5] == 'h' && s[6] == 'e' && s[7] == ' ' { + addMatch(id+73*n, l+13, l, matches) + } + } + } + } + } + } + } + } + + return has_found_match +} diff --git a/backend/vendor/github.com/andybalholm/brotli/static_dict_lut.go b/backend/vendor/github.com/andybalholm/brotli/static_dict_lut.go new file mode 100644 index 0000000..b33963e --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/static_dict_lut.go @@ -0,0 +1,75094 @@ +package brotli + +/* Copyright 2017 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Lookup table for static dictionary and transforms. */ + +type dictWord struct { + len byte + transform byte + idx uint16 +} + +const kDictNumBits int = 15 + +const kDictHashMul32 uint32 = 0x1E35A7BD + +var kStaticDictionaryBuckets = [32768]uint16{ + 1, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 3, + 6, + 0, + 0, + 0, + 0, + 0, + 20, + 0, + 0, + 0, + 21, + 0, + 22, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 23, + 0, + 0, + 25, + 0, + 29, + 0, + 53, + 0, + 0, + 0, + 0, + 0, + 0, + 55, + 0, + 0, + 0, + 0, + 0, + 0, + 61, + 76, + 0, + 0, + 0, + 94, + 0, + 0, + 0, + 0, + 0, + 0, + 96, + 0, + 97, + 0, + 98, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 99, + 101, + 106, + 108, + 0, + 0, + 0, + 0, + 0, + 110, + 0, + 111, + 112, + 0, + 113, + 118, + 124, + 0, + 0, + 0, + 0, + 0, + 125, + 128, + 0, + 0, + 0, + 0, + 129, + 0, + 0, + 131, + 0, + 0, + 0, + 0, + 0, + 0, + 132, + 0, + 0, + 135, + 0, + 0, + 0, + 137, + 0, + 0, + 0, + 0, + 0, + 138, + 139, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 142, + 143, + 144, + 0, + 0, + 0, + 0, + 0, + 145, + 0, + 0, + 0, + 146, + 149, + 151, + 152, + 0, + 0, + 153, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 154, + 0, + 0, + 0, + 0, + 0, + 0, + 155, + 0, + 0, + 0, + 0, + 160, + 182, + 0, + 0, + 0, + 0, + 0, + 0, + 183, + 0, + 0, + 0, + 188, + 189, + 0, + 0, + 192, + 0, + 0, + 0, + 0, + 0, + 0, + 194, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 197, + 202, + 209, + 0, + 0, + 210, + 0, + 224, + 0, + 0, + 0, + 225, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 231, + 0, + 0, + 0, + 232, + 0, + 240, + 0, + 0, + 242, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 244, + 0, + 0, + 0, + 246, + 0, + 0, + 249, + 251, + 253, + 0, + 0, + 0, + 0, + 0, + 258, + 0, + 0, + 261, + 263, + 0, + 0, + 0, + 267, + 0, + 0, + 268, + 0, + 269, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 271, + 0, + 0, + 0, + 0, + 0, + 0, + 272, + 0, + 273, + 0, + 277, + 0, + 278, + 286, + 0, + 0, + 0, + 0, + 287, + 0, + 289, + 290, + 291, + 0, + 0, + 0, + 295, + 0, + 0, + 296, + 297, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 298, + 0, + 0, + 0, + 299, + 0, + 0, + 305, + 0, + 324, + 0, + 0, + 0, + 0, + 0, + 327, + 0, + 328, + 329, + 0, + 0, + 0, + 0, + 336, + 0, + 0, + 340, + 0, + 341, + 342, + 343, + 0, + 0, + 346, + 0, + 348, + 0, + 0, + 0, + 0, + 0, + 0, + 349, + 351, + 0, + 0, + 355, + 0, + 363, + 0, + 364, + 0, + 368, + 369, + 0, + 370, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 372, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 373, + 0, + 375, + 0, + 0, + 0, + 0, + 376, + 377, + 0, + 0, + 394, + 395, + 396, + 0, + 0, + 398, + 0, + 0, + 0, + 0, + 400, + 0, + 0, + 408, + 0, + 0, + 0, + 0, + 420, + 0, + 0, + 0, + 0, + 0, + 0, + 421, + 0, + 0, + 422, + 423, + 0, + 0, + 429, + 435, + 436, + 442, + 0, + 0, + 443, + 0, + 444, + 445, + 453, + 456, + 0, + 457, + 0, + 0, + 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+ 0, + 673, + 0, + 0, + 0, + 674, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 682, + 0, + 687, + 0, + 690, + 0, + 693, + 699, + 700, + 0, + 0, + 0, + 0, + 0, + 0, + 704, + 705, + 0, + 0, + 0, + 0, + 707, + 710, + 0, + 711, + 0, + 0, + 0, + 0, + 726, + 0, + 0, + 729, + 0, + 0, + 0, + 730, + 731, + 0, + 0, + 0, + 0, + 0, + 752, + 0, + 0, + 0, + 762, + 0, + 763, + 0, + 0, + 767, + 0, + 0, + 0, + 770, + 774, + 0, + 0, + 775, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 776, + 0, + 0, + 0, + 777, + 783, + 0, + 0, + 0, + 785, + 788, + 0, + 0, + 0, + 0, + 790, + 0, + 0, + 0, + 793, + 0, + 0, + 0, + 0, + 794, + 0, + 0, + 804, + 819, + 821, + 0, + 827, + 0, + 0, + 0, + 834, + 0, + 0, + 835, + 0, + 0, + 0, + 841, + 0, + 844, + 0, + 850, + 851, + 859, + 0, + 860, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 874, + 0, + 876, + 0, + 877, + 890, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 893, + 894, + 898, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 899, + 0, + 0, + 0, + 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31490, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 31492, + 31493, + 31494, + 0, + 0, + 0, + 0, + 31501, + 31504, + 31505, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 31509, + 0, + 0, + 0, + 0, + 31510, + 0, + 0, + 31511, + 0, + 0, + 31513, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 31514, + 0, + 31522, + 31536, + 31539, + 31540, + 0, + 31541, + 0, + 0, + 0, + 0, + 0, + 0, + 31546, + 31553, + 31559, + 0, + 0, + 0, + 31560, + 31561, + 31562, + 0, + 0, + 31564, + 31567, + 0, + 31569, + 0, + 0, + 0, + 31570, + 0, + 0, + 0, + 0, + 31571, + 0, + 0, + 0, + 0, + 0, + 0, + 31572, + 31574, + 31580, + 31581, + 0, + 0, + 31582, + 31584, + 31585, + 31586, + 31595, + 0, + 31596, + 0, + 0, + 0, + 0, + 31597, + 0, + 31599, + 0, + 31600, + 31601, + 0, + 0, + 31603, + 31604, + 0, + 0, + 31608, + 31610, + 0, + 0, + 0, + 31611, + 0, + 31615, + 0, + 0, + 0, + 0, + 31616, + 0, + 0, + 0, + 0, + 0, + 0, + 31617, + 0, + 0, + 0, + 0, + 0, + 31618, + 0, + 0, + 0, + 0, + 0, + 0, + 31621, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 31622, + 31625, + 0, + 0, + 0, + 0, + 31627, + 0, + 31641, + 0, + 0, + 31642, + 0, + 0, + 31643, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 31644, + 0, + 31646, + 0, + 0, + 0, + 0, + 31648, + 0, + 0, + 0, + 31652, + 0, + 0, + 0, + 31657, + 0, + 0, + 31676, + 0, + 0, + 0, + 0, + 0, + 0, + 0, + 31689, + 31691, + 31692, + 0, + 31694, + 0, + 0, + 0, + 31696, + 0, + 31702, + 0, + 31703, + 0, +} + +var kStaticDictionaryWords = [31705]dictWord{ + dictWord{0, 0, 0}, + dictWord{8, 0, 1002}, + dictWord{136, 0, 1015}, + dictWord{4, 0, 683}, + dictWord{4, 10, 325}, + dictWord{138, 10, 125}, + dictWord{7, 11, 572}, + dictWord{ + 9, + 11, + 592, + }, + dictWord{11, 11, 680}, + dictWord{11, 11, 842}, + dictWord{11, 11, 924}, + dictWord{12, 11, 356}, + dictWord{12, 11, 550}, + dictWord{13, 11, 317}, + dictWord{13, 11, 370}, + dictWord{13, 11, 469}, + dictWord{13, 11, 471}, + dictWord{14, 11, 397}, + dictWord{18, 11, 69}, + dictWord{146, 11, 145}, + dictWord{ + 134, + 0, + 1265, + }, + dictWord{136, 11, 534}, + dictWord{134, 0, 1431}, + dictWord{11, 0, 138}, + dictWord{140, 0, 40}, + dictWord{4, 0, 155}, + dictWord{7, 0, 1689}, + dictWord{ + 4, + 10, + 718, + }, + dictWord{135, 10, 1216}, + dictWord{4, 0, 245}, + dictWord{5, 0, 151}, + dictWord{5, 0, 741}, + dictWord{6, 0, 1147}, + dictWord{7, 0, 498}, + dictWord{7, 0, 870}, + dictWord{7, 0, 1542}, + dictWord{12, 0, 213}, + dictWord{14, 0, 36}, + dictWord{14, 0, 391}, + dictWord{17, 0, 111}, + dictWord{18, 0, 6}, + dictWord{18, 0, 46}, + dictWord{ + 18, + 0, + 151, + }, + dictWord{19, 0, 36}, + dictWord{20, 0, 32}, + dictWord{20, 0, 56}, + dictWord{20, 0, 69}, + dictWord{20, 0, 102}, + dictWord{21, 0, 4}, + dictWord{22, 0, 8}, + dictWord{ + 22, + 0, + 10, + }, + dictWord{22, 0, 14}, + dictWord{150, 0, 31}, + dictWord{4, 0, 624}, + dictWord{135, 0, 1752}, + dictWord{5, 10, 124}, + dictWord{5, 10, 144}, + dictWord{6, 10, 548}, + dictWord{7, 10, 15}, + dictWord{7, 10, 153}, + dictWord{137, 10, 629}, + dictWord{6, 0, 503}, + dictWord{9, 0, 586}, + dictWord{13, 0, 468}, + dictWord{14, 0, 66}, + dictWord{ + 16, + 0, + 58, + }, + dictWord{7, 10, 1531}, + dictWord{8, 10, 416}, + dictWord{9, 10, 275}, + dictWord{10, 10, 100}, + dictWord{11, 10, 658}, + dictWord{11, 10, 979}, + dictWord{ + 12, + 10, + 86, + }, + dictWord{14, 10, 207}, + dictWord{15, 10, 20}, + dictWord{143, 10, 25}, + dictWord{5, 0, 603}, + dictWord{7, 0, 1212}, + dictWord{9, 0, 565}, + dictWord{ + 14, + 0, + 301, + }, + dictWord{5, 10, 915}, + dictWord{6, 10, 1783}, + dictWord{7, 10, 211}, + dictWord{7, 10, 1353}, + dictWord{9, 10, 83}, + dictWord{10, 10, 376}, + dictWord{ + 10, + 10, + 431, + }, + dictWord{11, 10, 543}, + dictWord{12, 10, 664}, + dictWord{13, 10, 280}, + dictWord{13, 10, 428}, + dictWord{14, 10, 128}, + dictWord{17, 10, 52}, + dictWord{ + 145, + 10, + 81, + }, + dictWord{4, 0, 492}, + dictWord{133, 0, 451}, + dictWord{135, 0, 835}, + dictWord{141, 0, 70}, + dictWord{132, 0, 539}, + dictWord{7, 11, 748}, + dictWord{ + 139, + 11, + 700, + }, + dictWord{7, 11, 1517}, + dictWord{11, 11, 597}, + dictWord{14, 11, 76}, + dictWord{14, 11, 335}, + dictWord{148, 11, 33}, + dictWord{6, 0, 113}, + dictWord{135, 0, 436}, + dictWord{4, 10, 338}, + dictWord{133, 10, 400}, + dictWord{136, 0, 718}, + dictWord{133, 11, 127}, + dictWord{133, 11, 418}, + dictWord{ + 6, + 0, + 1505, + }, + dictWord{7, 0, 520}, + dictWord{6, 11, 198}, + dictWord{11, 10, 892}, + dictWord{140, 11, 83}, + dictWord{4, 10, 221}, + dictWord{5, 10, 659}, + dictWord{ + 5, + 10, + 989, + }, + dictWord{7, 10, 697}, + dictWord{7, 10, 1211}, + dictWord{138, 10, 284}, + dictWord{135, 0, 1070}, + dictWord{5, 11, 276}, + dictWord{6, 11, 55}, + dictWord{ + 135, + 11, + 1369, + }, + dictWord{134, 0, 1515}, + dictWord{6, 11, 1752}, + dictWord{136, 11, 726}, + dictWord{138, 10, 507}, + dictWord{15, 0, 78}, + dictWord{4, 10, 188}, + dictWord{135, 10, 805}, + dictWord{5, 10, 884}, + dictWord{139, 10, 991}, + dictWord{133, 11, 764}, + dictWord{134, 10, 1653}, + dictWord{6, 11, 309}, + dictWord{ + 7, + 11, + 331, + }, + dictWord{138, 11, 550}, + dictWord{135, 11, 1861}, + dictWord{132, 11, 348}, + dictWord{135, 11, 986}, + dictWord{135, 11, 1573}, + dictWord{ + 12, + 0, + 610, + }, + dictWord{13, 0, 431}, + dictWord{144, 0, 59}, + dictWord{9, 11, 799}, + dictWord{140, 10, 166}, + dictWord{134, 0, 1530}, + dictWord{132, 0, 750}, + dictWord{132, 0, 307}, + dictWord{133, 0, 964}, + dictWord{6, 11, 194}, + dictWord{7, 11, 133}, + dictWord{10, 11, 493}, + dictWord{10, 11, 570}, + dictWord{139, 11, 664}, + dictWord{5, 11, 24}, + dictWord{5, 11, 569}, + dictWord{6, 11, 3}, + dictWord{6, 11, 119}, + dictWord{6, 11, 143}, + dictWord{6, 11, 440}, + dictWord{7, 11, 295}, + dictWord{ + 7, + 11, + 599, + }, + dictWord{7, 11, 1686}, + dictWord{7, 11, 1854}, + dictWord{8, 11, 424}, + dictWord{9, 11, 43}, + dictWord{9, 11, 584}, + dictWord{9, 11, 760}, + dictWord{ + 10, + 11, + 148, + }, + dictWord{10, 11, 328}, + dictWord{11, 11, 159}, + dictWord{11, 11, 253}, + dictWord{11, 11, 506}, + dictWord{12, 11, 487}, + dictWord{12, 11, 531}, + dictWord{144, 11, 33}, + dictWord{136, 10, 760}, + dictWord{5, 11, 14}, + dictWord{5, 11, 892}, + dictWord{6, 11, 283}, + dictWord{7, 11, 234}, + dictWord{136, 11, 537}, + dictWord{135, 11, 1251}, + dictWord{4, 11, 126}, + dictWord{8, 11, 635}, + dictWord{147, 11, 34}, + dictWord{4, 11, 316}, + dictWord{135, 11, 1561}, + dictWord{ + 6, + 0, + 999, + }, + dictWord{6, 0, 1310}, + dictWord{137, 11, 861}, + dictWord{4, 11, 64}, + dictWord{5, 11, 352}, + dictWord{5, 11, 720}, + dictWord{6, 11, 368}, + dictWord{ + 139, + 11, + 359, + }, + dictWord{4, 0, 75}, + dictWord{5, 0, 180}, + dictWord{6, 0, 500}, + dictWord{7, 0, 58}, + dictWord{7, 0, 710}, + dictWord{10, 0, 645}, + dictWord{136, 10, 770}, + dictWord{133, 0, 649}, + dictWord{6, 0, 276}, + dictWord{7, 0, 282}, + dictWord{7, 0, 879}, + dictWord{7, 0, 924}, + dictWord{8, 0, 459}, + dictWord{9, 0, 599}, + dictWord{9, 0, 754}, + dictWord{11, 0, 574}, + dictWord{12, 0, 128}, + dictWord{12, 0, 494}, + dictWord{13, 0, 52}, + dictWord{13, 0, 301}, + dictWord{15, 0, 30}, + dictWord{143, 0, 132}, + dictWord{132, 0, 200}, + dictWord{4, 10, 89}, + dictWord{5, 10, 489}, + dictWord{6, 10, 315}, + dictWord{7, 10, 553}, + dictWord{7, 10, 1745}, + dictWord{138, 10, 243}, + dictWord{135, 11, 1050}, + dictWord{7, 0, 1621}, + dictWord{6, 10, 1658}, + dictWord{9, 10, 3}, + dictWord{10, 10, 154}, + dictWord{11, 10, 641}, + dictWord{13, 10, 85}, + dictWord{13, 10, 201}, + dictWord{141, 10, 346}, + dictWord{6, 11, 175}, + dictWord{137, 11, 289}, + dictWord{5, 11, 432}, + dictWord{133, 11, 913}, + dictWord{ + 6, + 0, + 225, + }, + dictWord{137, 0, 211}, + dictWord{7, 0, 718}, + dictWord{8, 0, 687}, + dictWord{139, 0, 374}, + dictWord{4, 10, 166}, + dictWord{133, 10, 505}, + dictWord{ + 9, + 0, + 110, + }, + dictWord{134, 10, 1670}, + dictWord{8, 0, 58}, + dictWord{9, 0, 724}, + dictWord{11, 0, 809}, + dictWord{13, 0, 113}, + dictWord{145, 0, 72}, + dictWord{6, 0, 345}, + dictWord{7, 0, 1247}, + dictWord{144, 11, 82}, + dictWord{5, 11, 931}, + dictWord{134, 11, 1698}, + dictWord{8, 0, 767}, + dictWord{8, 0, 803}, + dictWord{9, 0, 301}, + dictWord{137, 0, 903}, + dictWord{139, 0, 203}, + dictWord{134, 0, 1154}, + dictWord{7, 0, 1949}, + dictWord{136, 0, 674}, + dictWord{134, 0, 259}, + dictWord{ + 135, + 0, + 1275, + }, + dictWord{5, 11, 774}, + dictWord{6, 11, 1637}, + dictWord{6, 11, 1686}, + dictWord{134, 11, 1751}, + dictWord{134, 0, 1231}, + dictWord{7, 10, 445}, + dictWord{8, 10, 307}, + dictWord{8, 10, 704}, + dictWord{10, 10, 41}, + dictWord{10, 10, 439}, + dictWord{11, 10, 237}, + dictWord{11, 10, 622}, + dictWord{140, 10, 201}, + dictWord{136, 0, 254}, + dictWord{6, 11, 260}, + dictWord{135, 11, 1484}, + dictWord{139, 0, 277}, + dictWord{135, 10, 1977}, + dictWord{4, 10, 189}, + dictWord{ + 5, + 10, + 713, + }, + dictWord{6, 11, 573}, + dictWord{136, 10, 57}, + dictWord{138, 10, 371}, + dictWord{132, 10, 552}, + dictWord{134, 11, 344}, + dictWord{133, 0, 248}, + dictWord{9, 0, 800}, + dictWord{10, 0, 693}, + dictWord{11, 0, 482}, + dictWord{11, 0, 734}, + dictWord{11, 0, 789}, + dictWord{134, 11, 240}, + dictWord{4, 0, 116}, + dictWord{ + 5, + 0, + 95, + }, + dictWord{5, 0, 445}, + dictWord{7, 0, 1688}, + dictWord{8, 0, 29}, + dictWord{9, 0, 272}, + dictWord{11, 0, 509}, + dictWord{11, 0, 915}, + dictWord{4, 11, 292}, + dictWord{4, 11, 736}, + dictWord{5, 11, 871}, + dictWord{6, 11, 171}, + dictWord{6, 11, 1689}, + dictWord{7, 11, 1324}, + dictWord{7, 11, 1944}, + dictWord{9, 11, 415}, + dictWord{9, 11, 580}, + dictWord{14, 11, 230}, + dictWord{146, 11, 68}, + dictWord{7, 0, 490}, + dictWord{13, 0, 100}, + dictWord{143, 0, 75}, + dictWord{135, 0, 1641}, + dictWord{133, 0, 543}, + dictWord{7, 11, 209}, + dictWord{8, 11, 661}, + dictWord{10, 11, 42}, + dictWord{11, 11, 58}, + dictWord{12, 11, 58}, + dictWord{12, 11, 118}, + dictWord{141, 11, 32}, + dictWord{5, 0, 181}, + dictWord{8, 0, 41}, + dictWord{6, 11, 63}, + dictWord{135, 11, 920}, + dictWord{133, 0, 657}, + dictWord{133, 11, 793}, + dictWord{138, 0, 709}, + dictWord{7, 0, 25}, + dictWord{8, 0, 202}, + dictWord{138, 0, 536}, + dictWord{5, 11, 665}, + dictWord{135, 10, 1788}, + dictWord{145, 10, 49}, + dictWord{9, 0, 423}, + dictWord{140, 0, 89}, + dictWord{5, 11, 67}, + dictWord{6, 11, 62}, + dictWord{6, 11, 374}, + dictWord{135, 11, 1391}, + dictWord{8, 0, 113}, + dictWord{ + 9, + 0, + 877, + }, + dictWord{10, 0, 554}, + dictWord{11, 0, 83}, + dictWord{12, 0, 136}, + dictWord{19, 0, 109}, + dictWord{9, 11, 790}, + dictWord{140, 11, 47}, + dictWord{ + 138, + 10, + 661, + }, + dictWord{4, 0, 963}, + dictWord{10, 0, 927}, + dictWord{14, 0, 442}, + dictWord{135, 10, 1945}, + dictWord{133, 0, 976}, + dictWord{132, 0, 206}, + dictWord{ + 4, + 11, + 391, + }, + dictWord{135, 11, 1169}, + dictWord{134, 0, 2002}, + dictWord{6, 0, 696}, + dictWord{134, 0, 1008}, + dictWord{134, 0, 1170}, + dictWord{132, 11, 271}, + dictWord{7, 0, 13}, + dictWord{8, 0, 226}, + dictWord{10, 0, 537}, + dictWord{11, 0, 570}, + dictWord{11, 0, 605}, + dictWord{11, 0, 799}, + dictWord{11, 0, 804}, + dictWord{ + 12, + 0, + 85, + }, + dictWord{12, 0, 516}, + dictWord{12, 0, 623}, + dictWord{13, 0, 112}, + dictWord{13, 0, 361}, + dictWord{14, 0, 77}, + dictWord{14, 0, 78}, + dictWord{17, 0, 28}, + dictWord{19, 0, 110}, + dictWord{140, 11, 314}, + dictWord{132, 0, 769}, + dictWord{134, 0, 1544}, + dictWord{4, 0, 551}, + dictWord{137, 0, 678}, + dictWord{5, 10, 84}, + dictWord{134, 10, 163}, + dictWord{9, 0, 57}, + dictWord{9, 0, 459}, + dictWord{10, 0, 425}, + dictWord{11, 0, 119}, + dictWord{12, 0, 184}, + dictWord{12, 0, 371}, + dictWord{ + 13, + 0, + 358, + }, + dictWord{145, 0, 51}, + dictWord{5, 0, 188}, + dictWord{5, 0, 814}, + dictWord{8, 0, 10}, + dictWord{9, 0, 421}, + dictWord{9, 0, 729}, + dictWord{10, 0, 609}, + dictWord{11, 0, 689}, + dictWord{4, 11, 253}, + dictWord{5, 10, 410}, + dictWord{5, 11, 544}, + dictWord{7, 11, 300}, + dictWord{137, 11, 340}, + dictWord{134, 0, 624}, + dictWord{138, 11, 321}, + dictWord{135, 0, 1941}, + dictWord{18, 0, 130}, + dictWord{5, 10, 322}, + dictWord{8, 10, 186}, + dictWord{9, 10, 262}, + dictWord{10, 10, 187}, + dictWord{142, 10, 208}, + dictWord{5, 11, 53}, + dictWord{5, 11, 541}, + dictWord{6, 11, 94}, + dictWord{6, 11, 499}, + dictWord{7, 11, 230}, + dictWord{139, 11, 321}, + dictWord{133, 10, 227}, + dictWord{4, 0, 378}, + dictWord{4, 11, 920}, + dictWord{5, 11, 25}, + dictWord{5, 11, 790}, + dictWord{6, 11, 457}, + dictWord{135, 11, 853}, + dictWord{137, 0, 269}, + dictWord{132, 0, 528}, + dictWord{134, 0, 1146}, + dictWord{7, 10, 1395}, + dictWord{8, 10, 486}, + dictWord{9, 10, 236}, + dictWord{9, 10, 878}, + dictWord{10, 10, 218}, + dictWord{11, 10, 95}, + dictWord{19, 10, 17}, + dictWord{147, 10, 31}, + dictWord{7, 10, 2043}, + dictWord{8, 10, 672}, + dictWord{ + 141, + 10, + 448, + }, + dictWord{134, 0, 1105}, + 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+ dictWord{7, 10, 1258}, + dictWord{144, 10, 32}, + dictWord{6, 0, 1880}, + dictWord{6, 0, 1887}, + dictWord{6, 0, 1918}, + dictWord{6, 0, 1924}, + dictWord{9, 0, 967}, + dictWord{9, 0, 995}, + dictWord{9, 0, 1015}, + dictWord{12, 0, 826}, + dictWord{12, 0, 849}, + dictWord{12, 0, 857}, + dictWord{12, 0, 860}, + dictWord{12, 0, 886}, + dictWord{ + 12, + 0, + 932, + }, + dictWord{18, 0, 228}, + dictWord{18, 0, 231}, + dictWord{146, 0, 240}, + dictWord{134, 0, 633}, + dictWord{134, 0, 1308}, + dictWord{4, 11, 37}, + dictWord{ + 5, + 11, + 334, + }, + dictWord{135, 11, 1253}, + dictWord{10, 0, 86}, + dictWord{4, 10, 4}, + dictWord{7, 10, 1118}, + dictWord{7, 10, 1320}, + dictWord{7, 10, 1706}, + dictWord{ + 8, + 10, + 277, + }, + dictWord{9, 10, 622}, + dictWord{11, 10, 724}, + dictWord{12, 10, 350}, + dictWord{12, 10, 397}, + dictWord{13, 10, 28}, + dictWord{13, 10, 159}, + dictWord{ + 15, + 10, + 89, + }, + dictWord{18, 10, 5}, + dictWord{19, 10, 9}, + dictWord{20, 10, 34}, + dictWord{150, 10, 47}, + dictWord{132, 11, 508}, + dictWord{137, 11, 448}, + dictWord{ + 12, + 11, + 107, + }, + dictWord{146, 11, 31}, + dictWord{132, 0, 817}, + dictWord{134, 0, 663}, + dictWord{133, 0, 882}, + dictWord{134, 0, 914}, + dictWord{132, 11, 540}, + dictWord{132, 11, 533}, + dictWord{136, 11, 608}, + dictWord{8, 0, 885}, + dictWord{138, 0, 865}, + dictWord{132, 0, 426}, + dictWord{6, 0, 58}, + dictWord{7, 0, 745}, + dictWord{7, 0, 1969}, + dictWord{8, 0, 399}, + dictWord{8, 0, 675}, + dictWord{9, 0, 479}, + dictWord{9, 0, 731}, + dictWord{10, 0, 330}, + dictWord{10, 0, 593}, + dictWord{ + 10, + 0, + 817, + }, + dictWord{11, 0, 32}, + dictWord{11, 0, 133}, + dictWord{11, 0, 221}, + dictWord{145, 0, 68}, + dictWord{134, 10, 255}, + dictWord{7, 0, 102}, + dictWord{ + 137, + 0, + 538, + }, + dictWord{137, 10, 216}, + dictWord{7, 11, 253}, + dictWord{136, 11, 549}, + dictWord{135, 11, 912}, + dictWord{9, 10, 183}, + dictWord{139, 10, 286}, + dictWord{11, 10, 956}, + dictWord{151, 10, 3}, + dictWord{8, 11, 527}, + dictWord{18, 11, 60}, + dictWord{147, 11, 24}, + dictWord{4, 10, 536}, + dictWord{7, 10, 1141}, + dictWord{10, 10, 723}, + dictWord{139, 10, 371}, + dictWord{133, 11, 920}, + dictWord{7, 0, 876}, + dictWord{135, 10, 285}, + dictWord{135, 10, 560}, + dictWord{ + 132, + 10, + 690, + }, + dictWord{142, 11, 126}, + dictWord{11, 10, 33}, + dictWord{12, 10, 571}, + dictWord{149, 10, 1}, + dictWord{133, 0, 566}, + dictWord{9, 0, 139}, + dictWord{ + 10, + 0, + 399, + }, + dictWord{11, 0, 469}, + dictWord{12, 0, 634}, + dictWord{13, 0, 223}, + dictWord{132, 11, 483}, + dictWord{6, 0, 48}, + dictWord{135, 0, 63}, + dictWord{18, 0, 12}, + dictWord{7, 10, 1862}, + dictWord{12, 10, 491}, + dictWord{12, 10, 520}, + dictWord{13, 10, 383}, + dictWord{142, 10, 244}, + dictWord{135, 11, 1665}, + dictWord{132, 11, 448}, + dictWord{9, 11, 495}, + dictWord{146, 11, 104}, + dictWord{6, 0, 114}, + dictWord{7, 0, 1224}, + dictWord{7, 0, 1556}, + dictWord{136, 0, 3}, + dictWord{ + 4, + 10, + 190, + }, + dictWord{133, 10, 554}, + dictWord{8, 0, 576}, + dictWord{9, 0, 267}, + dictWord{133, 10, 1001}, + dictWord{133, 10, 446}, + dictWord{133, 0, 933}, + dictWord{139, 11, 1009}, + dictWord{8, 11, 653}, + dictWord{13, 11, 93}, + dictWord{147, 11, 14}, + dictWord{6, 0, 692}, + dictWord{6, 0, 821}, + dictWord{134, 0, 1077}, + dictWord{5, 11, 172}, + dictWord{135, 11, 801}, + dictWord{138, 0, 752}, + dictWord{4, 0, 375}, + dictWord{134, 0, 638}, + dictWord{134, 0, 1011}, + dictWord{ + 140, + 11, + 540, + }, + dictWord{9, 0, 96}, + dictWord{133, 11, 260}, + dictWord{139, 11, 587}, + dictWord{135, 10, 1231}, + dictWord{12, 0, 30}, + dictWord{13, 0, 148}, + dictWord{ + 14, + 0, + 87, + }, + dictWord{14, 0, 182}, + dictWord{16, 0, 42}, + dictWord{20, 0, 70}, + dictWord{132, 10, 304}, + dictWord{6, 0, 1398}, + dictWord{7, 0, 56}, + dictWord{7, 0, 1989}, + dictWord{8, 0, 337}, + dictWord{8, 0, 738}, + dictWord{9, 0, 600}, + dictWord{12, 0, 37}, + dictWord{13, 0, 447}, + dictWord{142, 0, 92}, + dictWord{138, 0, 666}, + dictWord{ + 5, + 0, + 394, + }, + dictWord{7, 0, 487}, + dictWord{136, 0, 246}, + dictWord{9, 0, 437}, + dictWord{6, 10, 53}, + dictWord{6, 10, 199}, + dictWord{7, 10, 1408}, + dictWord{8, 10, 32}, + dictWord{8, 10, 93}, + dictWord{10, 10, 397}, + dictWord{10, 10, 629}, + dictWord{11, 10, 593}, + dictWord{11, 10, 763}, + dictWord{13, 10, 326}, + dictWord{145, 10, 35}, + dictWord{134, 10, 105}, + dictWord{9, 0, 320}, + dictWord{10, 0, 506}, + dictWord{138, 10, 794}, + dictWord{7, 11, 57}, + dictWord{8, 11, 167}, + dictWord{8, 11, 375}, + dictWord{9, 11, 82}, + dictWord{9, 11, 561}, + dictWord{10, 11, 620}, + dictWord{10, 11, 770}, + dictWord{11, 10, 704}, + dictWord{141, 10, 396}, + dictWord{6, 0, 1003}, + dictWord{5, 10, 114}, + dictWord{5, 10, 255}, + dictWord{141, 10, 285}, + dictWord{7, 0, 866}, + dictWord{135, 0, 1163}, + dictWord{133, 11, 531}, + dictWord{ + 132, + 0, + 328, + }, + dictWord{7, 10, 2035}, + dictWord{8, 10, 19}, + dictWord{9, 10, 89}, + dictWord{138, 10, 831}, + dictWord{8, 11, 194}, + dictWord{136, 11, 756}, + dictWord{ + 136, + 0, + 1000, + }, + dictWord{5, 11, 453}, + dictWord{134, 11, 441}, + dictWord{4, 0, 101}, + dictWord{5, 0, 833}, + dictWord{7, 0, 1171}, + dictWord{136, 0, 744}, + dictWord{ + 133, + 0, + 726, + }, + dictWord{136, 10, 746}, + dictWord{138, 0, 176}, + dictWord{6, 0, 9}, + dictWord{6, 0, 397}, + dictWord{7, 0, 53}, + dictWord{7, 0, 1742}, + dictWord{10, 0, 632}, + dictWord{11, 0, 828}, + dictWord{140, 0, 146}, + dictWord{135, 11, 22}, + dictWord{145, 11, 64}, + dictWord{132, 0, 839}, + dictWord{11, 0, 417}, + dictWord{12, 0, 223}, + dictWord{140, 0, 265}, + dictWord{4, 11, 102}, + dictWord{7, 11, 815}, + dictWord{7, 11, 1699}, + dictWord{139, 11, 964}, + dictWord{5, 10, 955}, + dictWord{ + 136, + 10, + 814, + }, + dictWord{6, 0, 1931}, + dictWord{6, 0, 2007}, + dictWord{18, 0, 246}, + dictWord{146, 0, 247}, + dictWord{8, 0, 198}, + dictWord{11, 0, 29}, + dictWord{140, 0, 534}, + dictWord{135, 0, 1771}, + dictWord{6, 0, 846}, + dictWord{7, 11, 1010}, + dictWord{11, 11, 733}, + dictWord{11, 11, 759}, + dictWord{12, 11, 563}, + dictWord{ + 13, + 11, + 34, + }, + dictWord{14, 11, 101}, + dictWord{18, 11, 45}, + dictWord{146, 11, 129}, + dictWord{4, 0, 186}, + dictWord{5, 0, 157}, + dictWord{8, 0, 168}, + dictWord{138, 0, 6}, + dictWord{132, 11, 899}, + dictWord{133, 10, 56}, + dictWord{148, 10, 100}, + dictWord{133, 0, 875}, + dictWord{5, 0, 773}, + dictWord{5, 0, 991}, + dictWord{6, 0, 1635}, + dictWord{134, 0, 1788}, + dictWord{6, 0, 1274}, + dictWord{9, 0, 477}, + dictWord{141, 0, 78}, + dictWord{4, 0, 639}, + dictWord{7, 0, 111}, + dictWord{8, 0, 581}, + dictWord{ + 12, + 0, + 177, + }, + dictWord{6, 11, 52}, + dictWord{9, 11, 104}, + dictWord{9, 11, 559}, + dictWord{10, 10, 4}, + dictWord{10, 10, 13}, + dictWord{11, 10, 638}, + dictWord{ + 12, + 11, + 308, + }, + dictWord{19, 11, 87}, + dictWord{148, 10, 57}, + dictWord{132, 11, 604}, + dictWord{4, 11, 301}, + dictWord{133, 10, 738}, + dictWord{133, 10, 758}, + dictWord{134, 0, 1747}, + dictWord{7, 11, 1440}, + dictWord{11, 11, 854}, + dictWord{11, 11, 872}, + dictWord{11, 11, 921}, + dictWord{12, 11, 551}, + dictWord{ + 13, + 11, + 472, + }, + dictWord{142, 11, 367}, + dictWord{7, 0, 1364}, + dictWord{7, 0, 1907}, + dictWord{141, 0, 158}, + dictWord{134, 0, 873}, + dictWord{4, 0, 404}, + dictWord{ + 4, + 0, + 659, + }, + dictWord{7, 0, 552}, + dictWord{135, 0, 675}, + dictWord{135, 10, 1112}, + dictWord{139, 10, 328}, + dictWord{7, 11, 508}, + dictWord{137, 10, 133}, + dictWord{133, 0, 391}, + dictWord{5, 10, 110}, + dictWord{6, 10, 169}, + dictWord{6, 10, 1702}, + dictWord{7, 10, 400}, + dictWord{8, 10, 538}, + dictWord{9, 10, 184}, + dictWord{ + 9, + 10, + 524, + }, + dictWord{140, 10, 218}, + dictWord{6, 11, 310}, + dictWord{7, 11, 1849}, + dictWord{8, 11, 72}, + dictWord{8, 11, 272}, + dictWord{8, 11, 431}, + dictWord{ + 9, + 11, + 12, + }, + dictWord{9, 11, 351}, + dictWord{10, 11, 563}, + dictWord{10, 11, 630}, + dictWord{10, 11, 810}, + dictWord{11, 11, 367}, + dictWord{11, 11, 599}, + dictWord{11, 11, 686}, + dictWord{140, 11, 672}, + dictWord{5, 0, 540}, + dictWord{6, 0, 1697}, + dictWord{136, 0, 668}, + dictWord{132, 0, 883}, + dictWord{134, 0, 78}, + dictWord{12, 0, 628}, + dictWord{18, 0, 79}, + dictWord{6, 10, 133}, + dictWord{9, 10, 353}, + dictWord{139, 10, 993}, + dictWord{6, 11, 181}, + dictWord{7, 11, 537}, + dictWord{ + 8, + 11, + 64, + }, + dictWord{9, 11, 127}, + dictWord{10, 11, 496}, + dictWord{12, 11, 510}, + dictWord{141, 11, 384}, + dictWord{6, 10, 93}, + dictWord{7, 10, 1422}, + dictWord{ + 7, + 10, + 1851, + }, + dictWord{8, 10, 673}, + dictWord{9, 10, 529}, + dictWord{140, 10, 43}, + dictWord{137, 10, 371}, + dictWord{134, 0, 1460}, + dictWord{134, 0, 962}, + dictWord{4, 11, 244}, + dictWord{135, 11, 233}, + dictWord{9, 10, 25}, + dictWord{10, 10, 467}, + dictWord{138, 10, 559}, + dictWord{4, 10, 335}, + dictWord{ + 135, + 10, + 942, + }, + dictWord{133, 0, 460}, + dictWord{135, 11, 334}, + dictWord{134, 11, 1650}, + dictWord{4, 0, 199}, + dictWord{139, 0, 34}, + dictWord{5, 10, 601}, + dictWord{ + 8, + 10, + 39, + }, + dictWord{10, 10, 773}, + dictWord{11, 10, 84}, + dictWord{12, 10, 205}, + dictWord{142, 10, 1}, + dictWord{133, 10, 870}, + dictWord{134, 0, 388}, + dictWord{14, 0, 474}, + dictWord{148, 0, 120}, + dictWord{133, 11, 369}, + dictWord{139, 0, 271}, + dictWord{4, 0, 511}, + dictWord{9, 0, 333}, + dictWord{9, 0, 379}, + dictWord{ + 10, + 0, + 602, + }, + dictWord{11, 0, 441}, + dictWord{11, 0, 723}, + dictWord{11, 0, 976}, + dictWord{12, 0, 357}, + dictWord{132, 10, 181}, + dictWord{134, 0, 608}, + dictWord{134, 10, 1652}, + dictWord{22, 0, 49}, + dictWord{137, 11, 338}, + dictWord{140, 0, 988}, + dictWord{134, 0, 617}, + dictWord{5, 0, 938}, + dictWord{136, 0, 707}, + dictWord{132, 10, 97}, + dictWord{5, 10, 147}, + dictWord{6, 10, 286}, + dictWord{7, 10, 1362}, + dictWord{141, 10, 176}, + dictWord{6, 0, 756}, + dictWord{ + 134, + 0, + 1149, + }, + dictWord{133, 11, 896}, + dictWord{6, 10, 375}, + dictWord{7, 10, 169}, + dictWord{7, 10, 254}, + dictWord{136, 10, 780}, + dictWord{134, 0, 1583}, + dictWord{135, 10, 1447}, + dictWord{139, 0, 285}, + dictWord{7, 11, 1117}, + dictWord{8, 11, 393}, + dictWord{136, 11, 539}, + dictWord{135, 0, 344}, + dictWord{ + 6, + 0, + 469, + }, + dictWord{7, 0, 1709}, + dictWord{138, 0, 515}, + dictWord{5, 10, 629}, + dictWord{135, 10, 1549}, + dictWord{5, 11, 4}, + dictWord{5, 11, 810}, + dictWord{ + 6, + 11, + 13, + }, + dictWord{6, 11, 538}, + dictWord{6, 11, 1690}, + dictWord{6, 11, 1726}, + dictWord{7, 11, 499}, + dictWord{7, 11, 1819}, + dictWord{8, 11, 148}, + dictWord{ + 8, + 11, + 696, + }, + dictWord{8, 11, 791}, + dictWord{12, 11, 125}, + dictWord{13, 11, 54}, + dictWord{143, 11, 9}, + dictWord{135, 11, 1268}, + dictWord{137, 0, 404}, + dictWord{ + 132, + 0, + 500, + }, + dictWord{5, 0, 68}, + dictWord{134, 0, 383}, + dictWord{11, 0, 216}, + dictWord{139, 0, 340}, + dictWord{4, 11, 925}, + dictWord{5, 11, 803}, + dictWord{ + 8, + 11, + 698, + }, + dictWord{138, 11, 828}, + dictWord{4, 0, 337}, + dictWord{6, 0, 353}, + dictWord{7, 0, 1934}, + dictWord{8, 0, 488}, + dictWord{137, 0, 429}, + dictWord{7, 0, 236}, + dictWord{7, 0, 1795}, + dictWord{8, 0, 259}, + dictWord{9, 0, 135}, + dictWord{9, 0, 177}, + dictWord{9, 0, 860}, + dictWord{10, 0, 825}, + dictWord{11, 0, 115}, + dictWord{ + 11, + 0, + 370, + }, + dictWord{11, 0, 405}, + dictWord{11, 0, 604}, + dictWord{12, 0, 10}, + dictWord{12, 0, 667}, + dictWord{12, 0, 669}, + dictWord{13, 0, 76}, + dictWord{14, 0, 310}, + dictWord{15, 0, 76}, + dictWord{15, 0, 147}, + dictWord{148, 0, 23}, + dictWord{4, 0, 15}, + dictWord{4, 0, 490}, + dictWord{5, 0, 22}, + dictWord{6, 0, 244}, + dictWord{7, 0, 40}, + dictWord{7, 0, 200}, + dictWord{7, 0, 906}, + dictWord{7, 0, 1199}, + dictWord{9, 0, 616}, + dictWord{10, 0, 716}, + dictWord{11, 0, 635}, + dictWord{11, 0, 801}, + dictWord{ + 140, + 0, + 458, + }, + dictWord{12, 0, 756}, + dictWord{132, 10, 420}, + dictWord{134, 0, 1504}, + dictWord{6, 0, 757}, + dictWord{133, 11, 383}, + dictWord{6, 0, 1266}, + dictWord{ + 135, + 0, + 1735, + }, + dictWord{5, 0, 598}, + dictWord{7, 0, 791}, + dictWord{8, 0, 108}, + dictWord{9, 0, 123}, + dictWord{7, 10, 1570}, + dictWord{140, 10, 542}, + dictWord{ + 142, + 11, + 410, + }, + dictWord{9, 11, 660}, + dictWord{138, 11, 347}, +} diff --git a/backend/vendor/github.com/andybalholm/brotli/symbol_list.go b/backend/vendor/github.com/andybalholm/brotli/symbol_list.go new file mode 100644 index 0000000..c5cb49e --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/symbol_list.go @@ -0,0 +1,22 @@ +package brotli + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Utilities for building Huffman decoding tables. */ + +type symbolList struct { + storage []uint16 + offset int +} + +func symbolListGet(sl symbolList, i int) uint16 { + return sl.storage[i+sl.offset] +} + +func symbolListPut(sl symbolList, i int, val uint16) { + sl.storage[i+sl.offset] = val +} diff --git a/backend/vendor/github.com/andybalholm/brotli/transform.go b/backend/vendor/github.com/andybalholm/brotli/transform.go new file mode 100644 index 0000000..d2c043a --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/transform.go @@ -0,0 +1,641 @@ +package brotli + +const ( + transformIdentity = 0 + transformOmitLast1 = 1 + transformOmitLast2 = 2 + transformOmitLast3 = 3 + transformOmitLast4 = 4 + transformOmitLast5 = 5 + transformOmitLast6 = 6 + transformOmitLast7 = 7 + transformOmitLast8 = 8 + transformOmitLast9 = 9 + transformUppercaseFirst = 10 + transformUppercaseAll = 11 + transformOmitFirst1 = 12 + transformOmitFirst2 = 13 + transformOmitFirst3 = 14 + transformOmitFirst4 = 15 + transformOmitFirst5 = 16 + transformOmitFirst6 = 17 + transformOmitFirst7 = 18 + transformOmitFirst8 = 19 + transformOmitFirst9 = 20 + transformShiftFirst = 21 + transformShiftAll = 22 + iota - 22 + numTransformTypes +) + +const transformsMaxCutOff = transformOmitLast9 + +type transforms struct { + prefix_suffix_size uint16 + prefix_suffix []byte + prefix_suffix_map []uint16 + num_transforms uint32 + transforms []byte + params []byte + cutOffTransforms [transformsMaxCutOff + 1]int16 +} + +func transformPrefixId(t *transforms, I int) byte { + return t.transforms[(I*3)+0] +} + +func transformType(t *transforms, I int) byte { + return t.transforms[(I*3)+1] +} + +func transformSuffixId(t *transforms, I int) byte { + return t.transforms[(I*3)+2] +} + +func transformPrefix(t *transforms, I int) []byte { + return t.prefix_suffix[t.prefix_suffix_map[transformPrefixId(t, I)]:] +} + +func transformSuffix(t *transforms, I int) []byte { + return t.prefix_suffix[t.prefix_suffix_map[transformSuffixId(t, I)]:] +} + +/* RFC 7932 transforms string data */ +const kPrefixSuffix string = "\001 \002, \010 of the \004 of \002s \001.\005 and \004 " + "in \001\"\004 to \002\">\001\n\002. \001]\005 for \003 a \006 " + "that \001'\006 with \006 from \004 by \001(\006. T" + "he \004 on \004 as \004 is \004ing \002\n\t\001:\003ed " + "\002=\"\004 at \003ly \001,\002='\005.com/\007. This \005" + " not \003er \003al \004ful \004ive \005less \004es" + "t \004ize \002\xc2\xa0\004ous \005 the \002e \000" + +var kPrefixSuffixMap = [50]uint16{ + 0x00, + 0x02, + 0x05, + 0x0E, + 0x13, + 0x16, + 0x18, + 0x1E, + 0x23, + 0x25, + 0x2A, + 0x2D, + 0x2F, + 0x32, + 0x34, + 0x3A, + 0x3E, + 0x45, + 0x47, + 0x4E, + 0x55, + 0x5A, + 0x5C, + 0x63, + 0x68, + 0x6D, + 0x72, + 0x77, + 0x7A, + 0x7C, + 0x80, + 0x83, + 0x88, + 0x8C, + 0x8E, + 0x91, + 0x97, + 0x9F, + 0xA5, + 0xA9, + 0xAD, + 0xB2, + 0xB7, + 0xBD, + 0xC2, + 0xC7, + 0xCA, + 0xCF, + 0xD5, + 0xD8, +} + +/* RFC 7932 transforms */ +var kTransformsData = []byte{ + 49, + transformIdentity, + 49, + 49, + transformIdentity, + 0, + 0, + transformIdentity, + 0, + 49, + transformOmitFirst1, + 49, + 49, + transformUppercaseFirst, + 0, + 49, + transformIdentity, + 47, + 0, + transformIdentity, + 49, + 4, + transformIdentity, + 0, + 49, + transformIdentity, + 3, + 49, + transformUppercaseFirst, + 49, + 49, + transformIdentity, + 6, + 49, + transformOmitFirst2, + 49, + 49, + transformOmitLast1, + 49, + 1, + transformIdentity, + 0, + 49, + transformIdentity, + 1, + 0, + transformUppercaseFirst, + 0, + 49, + transformIdentity, + 7, + 49, + transformIdentity, + 9, + 48, + transformIdentity, + 0, + 49, + transformIdentity, + 8, + 49, + transformIdentity, + 5, + 49, + transformIdentity, + 10, + 49, + transformIdentity, + 11, + 49, + transformOmitLast3, + 49, + 49, + transformIdentity, + 13, + 49, + transformIdentity, + 14, + 49, + transformOmitFirst3, + 49, + 49, + transformOmitLast2, + 49, + 49, + transformIdentity, + 15, + 49, + transformIdentity, + 16, + 0, + transformUppercaseFirst, + 49, + 49, + transformIdentity, + 12, + 5, + transformIdentity, + 49, + 0, + transformIdentity, + 1, + 49, + transformOmitFirst4, + 49, + 49, + transformIdentity, + 18, + 49, + transformIdentity, + 17, + 49, + transformIdentity, + 19, + 49, + transformIdentity, + 20, + 49, + transformOmitFirst5, + 49, + 49, + transformOmitFirst6, + 49, + 47, + transformIdentity, + 49, + 49, + transformOmitLast4, + 49, + 49, + transformIdentity, + 22, + 49, + transformUppercaseAll, + 49, + 49, + transformIdentity, + 23, + 49, + transformIdentity, + 24, + 49, + transformIdentity, + 25, + 49, + transformOmitLast7, + 49, + 49, + transformOmitLast1, + 26, + 49, + transformIdentity, + 27, + 49, + transformIdentity, + 28, + 0, + transformIdentity, + 12, + 49, + transformIdentity, + 29, + 49, + transformOmitFirst9, + 49, + 49, + transformOmitFirst7, + 49, + 49, + transformOmitLast6, + 49, + 49, + transformIdentity, + 21, + 49, + transformUppercaseFirst, + 1, + 49, + transformOmitLast8, + 49, + 49, + transformIdentity, + 31, + 49, + transformIdentity, + 32, + 47, + transformIdentity, + 3, + 49, + transformOmitLast5, + 49, + 49, + transformOmitLast9, + 49, + 0, + transformUppercaseFirst, + 1, + 49, + transformUppercaseFirst, + 8, + 5, + transformIdentity, + 21, + 49, + transformUppercaseAll, + 0, + 49, + transformUppercaseFirst, + 10, + 49, + transformIdentity, + 30, + 0, + transformIdentity, + 5, + 35, + transformIdentity, + 49, + 47, + transformIdentity, + 2, + 49, + transformUppercaseFirst, + 17, + 49, + transformIdentity, + 36, + 49, + transformIdentity, + 33, + 5, + transformIdentity, + 0, + 49, + transformUppercaseFirst, + 21, + 49, + transformUppercaseFirst, + 5, + 49, + transformIdentity, + 37, + 0, + transformIdentity, + 30, + 49, + transformIdentity, + 38, + 0, + transformUppercaseAll, + 0, + 49, + transformIdentity, + 39, + 0, + transformUppercaseAll, + 49, + 49, + transformIdentity, + 34, + 49, + transformUppercaseAll, + 8, + 49, + transformUppercaseFirst, + 12, + 0, + transformIdentity, + 21, + 49, + transformIdentity, + 40, + 0, + transformUppercaseFirst, + 12, + 49, + transformIdentity, + 41, + 49, + transformIdentity, + 42, + 49, + transformUppercaseAll, + 17, + 49, + transformIdentity, + 43, + 0, + transformUppercaseFirst, + 5, + 49, + transformUppercaseAll, + 10, + 0, + transformIdentity, + 34, + 49, + transformUppercaseFirst, + 33, + 49, + transformIdentity, + 44, + 49, + transformUppercaseAll, + 5, + 45, + transformIdentity, + 49, + 0, + transformIdentity, + 33, + 49, + transformUppercaseFirst, + 30, + 49, + transformUppercaseAll, + 30, + 49, + transformIdentity, + 46, + 49, + transformUppercaseAll, + 1, + 49, + transformUppercaseFirst, + 34, + 0, + transformUppercaseFirst, + 33, + 0, + transformUppercaseAll, + 30, + 0, + transformUppercaseAll, + 1, + 49, + transformUppercaseAll, + 33, + 49, + transformUppercaseAll, + 21, + 49, + transformUppercaseAll, + 12, + 0, + transformUppercaseAll, + 5, + 49, + transformUppercaseAll, + 34, + 0, + transformUppercaseAll, + 12, + 0, + transformUppercaseFirst, + 30, + 0, + transformUppercaseAll, + 34, + 0, + transformUppercaseFirst, + 34, +} + +var kBrotliTransforms = transforms{ + 217, + []byte(kPrefixSuffix), + kPrefixSuffixMap[:], + 121, + kTransformsData, + nil, /* no extra parameters */ + [transformsMaxCutOff + 1]int16{0, 12, 27, 23, 42, 63, 56, 48, 59, 64}, +} + +func getTransforms() *transforms { + return &kBrotliTransforms +} + +func toUpperCase(p []byte) int { + if p[0] < 0xC0 { + if p[0] >= 'a' && p[0] <= 'z' { + p[0] ^= 32 + } + + return 1 + } + + /* An overly simplified uppercasing model for UTF-8. */ + if p[0] < 0xE0 { + p[1] ^= 32 + return 2 + } + + /* An arbitrary transform for three byte characters. */ + p[2] ^= 5 + + return 3 +} + +func shiftTransform(word []byte, word_len int, parameter uint16) int { + /* Limited sign extension: scalar < (1 << 24). */ + var scalar uint32 = (uint32(parameter) & 0x7FFF) + (0x1000000 - (uint32(parameter) & 0x8000)) + if word[0] < 0x80 { + /* 1-byte rune / 0sssssss / 7 bit scalar (ASCII). */ + scalar += uint32(word[0]) + + word[0] = byte(scalar & 0x7F) + return 1 + } else if word[0] < 0xC0 { + /* Continuation / 10AAAAAA. */ + return 1 + } else if word[0] < 0xE0 { + /* 2-byte rune / 110sssss AAssssss / 11 bit scalar. */ + if word_len < 2 { + return 1 + } + scalar += uint32(word[1]&0x3F | (word[0]&0x1F)<<6) + word[0] = byte(0xC0 | (scalar>>6)&0x1F) + word[1] = byte(uint32(word[1]&0xC0) | scalar&0x3F) + return 2 + } else if word[0] < 0xF0 { + /* 3-byte rune / 1110ssss AAssssss BBssssss / 16 bit scalar. */ + if word_len < 3 { + return word_len + } + scalar += uint32(word[2])&0x3F | uint32(word[1]&0x3F)<<6 | uint32(word[0]&0x0F)<<12 + word[0] = byte(0xE0 | (scalar>>12)&0x0F) + word[1] = byte(uint32(word[1]&0xC0) | (scalar>>6)&0x3F) + word[2] = byte(uint32(word[2]&0xC0) | scalar&0x3F) + return 3 + } else if word[0] < 0xF8 { + /* 4-byte rune / 11110sss AAssssss BBssssss CCssssss / 21 bit scalar. */ + if word_len < 4 { + return word_len + } + scalar += uint32(word[3])&0x3F | uint32(word[2]&0x3F)<<6 | uint32(word[1]&0x3F)<<12 | uint32(word[0]&0x07)<<18 + word[0] = byte(0xF0 | (scalar>>18)&0x07) + word[1] = byte(uint32(word[1]&0xC0) | (scalar>>12)&0x3F) + word[2] = byte(uint32(word[2]&0xC0) | (scalar>>6)&0x3F) + word[3] = byte(uint32(word[3]&0xC0) | scalar&0x3F) + return 4 + } + + return 1 +} + +func transformDictionaryWord(dst []byte, word []byte, len int, trans *transforms, transform_idx int) int { + var idx int = 0 + var prefix []byte = transformPrefix(trans, transform_idx) + var type_ byte = transformType(trans, transform_idx) + var suffix []byte = transformSuffix(trans, transform_idx) + { + var prefix_len int = int(prefix[0]) + prefix = prefix[1:] + for { + tmp1 := prefix_len + prefix_len-- + if tmp1 == 0 { + break + } + dst[idx] = prefix[0] + idx++ + prefix = prefix[1:] + } + } + { + var t int = int(type_) + var i int = 0 + if t <= transformOmitLast9 { + len -= t + } else if t >= transformOmitFirst1 && t <= transformOmitFirst9 { + var skip int = t - (transformOmitFirst1 - 1) + word = word[skip:] + len -= skip + } + + for i < len { + dst[idx] = word[i] + idx++ + i++ + } + if t == transformUppercaseFirst { + toUpperCase(dst[idx-len:]) + } else if t == transformUppercaseAll { + var uppercase []byte = dst + uppercase = uppercase[idx-len:] + for len > 0 { + var step int = toUpperCase(uppercase) + uppercase = uppercase[step:] + len -= step + } + } else if t == transformShiftFirst { + var param uint16 = uint16(trans.params[transform_idx*2]) + uint16(trans.params[transform_idx*2+1])<<8 + shiftTransform(dst[idx-len:], int(len), param) + } else if t == transformShiftAll { + var param uint16 = uint16(trans.params[transform_idx*2]) + uint16(trans.params[transform_idx*2+1])<<8 + var shift []byte = dst + shift = shift[idx-len:] + for len > 0 { + var step int = shiftTransform(shift, int(len), param) + shift = shift[step:] + len -= step + } + } + } + { + var suffix_len int = int(suffix[0]) + suffix = suffix[1:] + for { + tmp2 := suffix_len + suffix_len-- + if tmp2 == 0 { + break + } + dst[idx] = suffix[0] + idx++ + suffix = suffix[1:] + } + return idx + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/utf8_util.go b/backend/vendor/github.com/andybalholm/brotli/utf8_util.go new file mode 100644 index 0000000..3244247 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/utf8_util.go @@ -0,0 +1,70 @@ +package brotli + +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Heuristics for deciding about the UTF8-ness of strings. */ + +const kMinUTF8Ratio float64 = 0.75 + +/* Returns 1 if at least min_fraction of the bytes between pos and + pos + length in the (data, mask) ring-buffer is UTF8-encoded, otherwise + returns 0. */ +func parseAsUTF8(symbol *int, input []byte, size uint) uint { + /* ASCII */ + if input[0]&0x80 == 0 { + *symbol = int(input[0]) + if *symbol > 0 { + return 1 + } + } + + /* 2-byte UTF8 */ + if size > 1 && input[0]&0xE0 == 0xC0 && input[1]&0xC0 == 0x80 { + *symbol = (int(input[0])&0x1F)<<6 | int(input[1])&0x3F + if *symbol > 0x7F { + return 2 + } + } + + /* 3-byte UFT8 */ + if size > 2 && input[0]&0xF0 == 0xE0 && input[1]&0xC0 == 0x80 && input[2]&0xC0 == 0x80 { + *symbol = (int(input[0])&0x0F)<<12 | (int(input[1])&0x3F)<<6 | int(input[2])&0x3F + if *symbol > 0x7FF { + return 3 + } + } + + /* 4-byte UFT8 */ + if size > 3 && input[0]&0xF8 == 0xF0 && input[1]&0xC0 == 0x80 && input[2]&0xC0 == 0x80 && input[3]&0xC0 == 0x80 { + *symbol = (int(input[0])&0x07)<<18 | (int(input[1])&0x3F)<<12 | (int(input[2])&0x3F)<<6 | int(input[3])&0x3F + if *symbol > 0xFFFF && *symbol <= 0x10FFFF { + return 4 + } + } + + /* Not UTF8, emit a special symbol above the UTF8-code space */ + *symbol = 0x110000 | int(input[0]) + + return 1 +} + +/* Returns 1 if at least min_fraction of the data is UTF8-encoded.*/ +func isMostlyUTF8(data []byte, pos uint, mask uint, length uint, min_fraction float64) bool { + var size_utf8 uint = 0 + var i uint = 0 + for i < length { + var symbol int + current_data := data[(pos+i)&mask:] + var bytes_read uint = parseAsUTF8(&symbol, current_data, length-i) + i += bytes_read + if symbol < 0x110000 { + size_utf8 += bytes_read + } + } + + return float64(size_utf8) > min_fraction*float64(length) +} diff --git a/backend/vendor/github.com/andybalholm/brotli/util.go b/backend/vendor/github.com/andybalholm/brotli/util.go new file mode 100644 index 0000000..a84553a --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/util.go @@ -0,0 +1,7 @@ +package brotli + +func assert(cond bool) { + if !cond { + panic("assertion failure") + } +} diff --git a/backend/vendor/github.com/andybalholm/brotli/write_bits.go b/backend/vendor/github.com/andybalholm/brotli/write_bits.go new file mode 100644 index 0000000..8729901 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/write_bits.go @@ -0,0 +1,52 @@ +package brotli + +import "encoding/binary" + +/* Copyright 2010 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Write bits into a byte array. */ + +/* This function writes bits into bytes in increasing addresses, and within + a byte least-significant-bit first. + + The function can write up to 56 bits in one go with WriteBits + Example: let's assume that 3 bits (Rs below) have been written already: + + BYTE-0 BYTE+1 BYTE+2 + + 0000 0RRR 0000 0000 0000 0000 + + Now, we could write 5 or less bits in MSB by just sifting by 3 + and OR'ing to BYTE-0. + + For n bits, we take the last 5 bits, OR that with high bits in BYTE-0, + and locate the rest in BYTE+1, BYTE+2, etc. */ +func writeBits(n_bits uint, bits uint64, pos *uint, array []byte) { + /* This branch of the code can write up to 56 bits at a time, + 7 bits are lost by being perhaps already in *p and at least + 1 bit is needed to initialize the bit-stream ahead (i.e. if 7 + bits are in *p and we write 57 bits, then the next write will + access a byte that was never initialized). */ + p := array[*pos>>3:] + v := uint64(p[0]) + v |= bits << (*pos & 7) + binary.LittleEndian.PutUint64(p, v) + *pos += n_bits +} + +func writeSingleBit(bit bool, pos *uint, array []byte) { + if bit { + writeBits(1, 1, pos, array) + } else { + writeBits(1, 0, pos, array) + } +} + +func writeBitsPrepareStorage(pos uint, array []byte) { + assert(pos&7 == 0) + array[pos>>3] = 0 +} diff --git a/backend/vendor/github.com/andybalholm/brotli/writer.go b/backend/vendor/github.com/andybalholm/brotli/writer.go new file mode 100644 index 0000000..277f252 --- /dev/null +++ b/backend/vendor/github.com/andybalholm/brotli/writer.go @@ -0,0 +1,174 @@ +package brotli + +import ( + "errors" + "io" + + "github.com/andybalholm/brotli/matchfinder" +) + +const ( + BestSpeed = 0 + BestCompression = 11 + DefaultCompression = 6 +) + +// WriterOptions configures Writer. +type WriterOptions struct { + // Quality controls the compression-speed vs compression-density trade-offs. + // The higher the quality, the slower the compression. Range is 0 to 11. + Quality int + // LGWin is the base 2 logarithm of the sliding window size. + // Range is 10 to 24. 0 indicates automatic configuration based on Quality. + LGWin int +} + +var ( + errEncode = errors.New("brotli: encode error") + errWriterClosed = errors.New("brotli: Writer is closed") +) + +// Writes to the returned writer are compressed and written to dst. +// It is the caller's responsibility to call Close on the Writer when done. +// Writes may be buffered and not flushed until Close. +func NewWriter(dst io.Writer) *Writer { + return NewWriterLevel(dst, DefaultCompression) +} + +// NewWriterLevel is like NewWriter but specifies the compression level instead +// of assuming DefaultCompression. +// The compression level can be DefaultCompression or any integer value between +// BestSpeed and BestCompression inclusive. +func NewWriterLevel(dst io.Writer, level int) *Writer { + return NewWriterOptions(dst, WriterOptions{ + Quality: level, + }) +} + +// NewWriterOptions is like NewWriter but specifies WriterOptions +func NewWriterOptions(dst io.Writer, options WriterOptions) *Writer { + w := new(Writer) + w.options = options + w.Reset(dst) + return w +} + +// Reset discards the Writer's state and makes it equivalent to the result of +// its original state from NewWriter or NewWriterLevel, but writing to dst +// instead. This permits reusing a Writer rather than allocating a new one. +func (w *Writer) Reset(dst io.Writer) { + encoderInitState(w) + w.params.quality = w.options.Quality + if w.options.LGWin > 0 { + w.params.lgwin = uint(w.options.LGWin) + } + w.dst = dst + w.err = nil +} + +func (w *Writer) writeChunk(p []byte, op int) (n int, err error) { + if w.dst == nil { + return 0, errWriterClosed + } + if w.err != nil { + return 0, w.err + } + + for { + availableIn := uint(len(p)) + nextIn := p + success := encoderCompressStream(w, op, &availableIn, &nextIn) + bytesConsumed := len(p) - int(availableIn) + p = p[bytesConsumed:] + n += bytesConsumed + if !success { + return n, errEncode + } + + if len(p) == 0 || w.err != nil { + return n, w.err + } + } +} + +// Flush outputs encoded data for all input provided to Write. The resulting +// output can be decoded to match all input before Flush, but the stream is +// not yet complete until after Close. +// Flush has a negative impact on compression. +func (w *Writer) Flush() error { + _, err := w.writeChunk(nil, operationFlush) + return err +} + +// Close flushes remaining data to the decorated writer. +func (w *Writer) Close() error { + // If stream is already closed, it is reported by `writeChunk`. + _, err := w.writeChunk(nil, operationFinish) + w.dst = nil + return err +} + +// Write implements io.Writer. Flush or Close must be called to ensure that the +// encoded bytes are actually flushed to the underlying Writer. +func (w *Writer) Write(p []byte) (n int, err error) { + return w.writeChunk(p, operationProcess) +} + +type nopCloser struct { + io.Writer +} + +func (nopCloser) Close() error { return nil } + +// NewWriterV2 is like NewWriterLevel, but it uses the new implementation +// based on the matchfinder package. It currently supports up to level 9; +// if a higher level is specified, level 9 will be used. +func NewWriterV2(dst io.Writer, level int) *matchfinder.Writer { + var mf matchfinder.MatchFinder + if level < 2 { + mf = matchfinder.M0{Lazy: level == 1} + } else if level < 8 { + hashLen := 6 + if level >= 6 { + hashLen = 5 + } + chainLen := 16 + switch level { + case 2: + chainLen = 0 + case 3: + chainLen = 1 + case 4: + chainLen = 2 + case 5: + chainLen = 4 + case 6: + chainLen = 8 + } + mf = &matchfinder.M4{ + MaxDistance: 1 << 20, + ChainLength: chainLen, + HashLen: hashLen, + DistanceBitCost: 66, + } + } else { + chainLen := 32 + hashLen := 5 + if level == 8 { + chainLen = 4 + hashLen = 6 + } + mf = &matchfinder.Pathfinder{ + MaxDistance: 1 << 20, + ChainLength: chainLen, + HashLen: hashLen, + } + } + + return &matchfinder.Writer{ + Dest: dst, + MatchFinder: mf, + Encoder: &Encoder{}, + BlockSize: 1 << 16, + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/LICENSE b/backend/vendor/github.com/cloudflare/circl/LICENSE new file mode 100644 index 0000000..67edaa9 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/LICENSE @@ -0,0 +1,57 @@ +Copyright (c) 2019 Cloudflare. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Cloudflare nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +======================================================================== + +Copyright (c) 2009 The Go Authors. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve.go b/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve.go new file mode 100644 index 0000000..f9057c2 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve.go @@ -0,0 +1,96 @@ +package x25519 + +import ( + fp "github.com/cloudflare/circl/math/fp25519" +) + +// ladderJoye calculates a fixed-point multiplication with the generator point. +// The algorithm is the right-to-left Joye's ladder as described +// in "How to precompute a ladder" in SAC'2017. +func ladderJoye(k *Key) { + w := [5]fp.Elt{} // [mu,x1,z1,x2,z2] order must be preserved. + fp.SetOne(&w[1]) // x1 = 1 + fp.SetOne(&w[2]) // z1 = 1 + w[3] = fp.Elt{ // x2 = G-S + 0xbd, 0xaa, 0x2f, 0xc8, 0xfe, 0xe1, 0x94, 0x7e, + 0xf8, 0xed, 0xb2, 0x14, 0xae, 0x95, 0xf0, 0xbb, + 0xe2, 0x48, 0x5d, 0x23, 0xb9, 0xa0, 0xc7, 0xad, + 0x34, 0xab, 0x7c, 0xe2, 0xee, 0xcd, 0xae, 0x1e, + } + fp.SetOne(&w[4]) // z2 = 1 + + const n = 255 + const h = 3 + swap := uint(1) + for s := 0; s < n-h; s++ { + i := (s + h) / 8 + j := (s + h) % 8 + bit := uint((k[i] >> uint(j)) & 1) + copy(w[0][:], tableGenerator[s*Size:(s+1)*Size]) + diffAdd(&w, swap^bit) + swap = bit + } + for s := 0; s < h; s++ { + double(&w[1], &w[2]) + } + toAffine((*[fp.Size]byte)(k), &w[1], &w[2]) +} + +// ladderMontgomery calculates a generic scalar point multiplication +// The algorithm implemented is the left-to-right Montgomery's ladder. +func ladderMontgomery(k, xP *Key) { + w := [5]fp.Elt{} // [x1, x2, z2, x3, z3] order must be preserved. + w[0] = *(*fp.Elt)(xP) // x1 = xP + fp.SetOne(&w[1]) // x2 = 1 + w[3] = *(*fp.Elt)(xP) // x3 = xP + fp.SetOne(&w[4]) // z3 = 1 + + move := uint(0) + for s := 255 - 1; s >= 0; s-- { + i := s / 8 + j := s % 8 + bit := uint((k[i] >> uint(j)) & 1) + ladderStep(&w, move^bit) + move = bit + } + toAffine((*[fp.Size]byte)(k), &w[1], &w[2]) +} + +func toAffine(k *[fp.Size]byte, x, z *fp.Elt) { + fp.Inv(z, z) + fp.Mul(x, x, z) + _ = fp.ToBytes(k[:], x) +} + +var lowOrderPoints = [5]fp.Elt{ + { /* (0,_,1) point of order 2 on Curve25519 */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + }, + { /* (1,_,1) point of order 4 on Curve25519 */ + 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + }, + { /* (x,_,1) first point of order 8 on Curve25519 */ + 0xe0, 0xeb, 0x7a, 0x7c, 0x3b, 0x41, 0xb8, 0xae, + 0x16, 0x56, 0xe3, 0xfa, 0xf1, 0x9f, 0xc4, 0x6a, + 0xda, 0x09, 0x8d, 0xeb, 0x9c, 0x32, 0xb1, 0xfd, + 0x86, 0x62, 0x05, 0x16, 0x5f, 0x49, 0xb8, 0x00, + }, + { /* (x,_,1) second point of order 8 on Curve25519 */ + 0x5f, 0x9c, 0x95, 0xbc, 0xa3, 0x50, 0x8c, 0x24, + 0xb1, 0xd0, 0xb1, 0x55, 0x9c, 0x83, 0xef, 0x5b, + 0x04, 0x44, 0x5c, 0xc4, 0x58, 0x1c, 0x8e, 0x86, + 0xd8, 0x22, 0x4e, 0xdd, 0xd0, 0x9f, 0x11, 0x57, + }, + { /* (-1,_,1) a point of order 4 on the twist of Curve25519 */ + 0xec, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f, + }, +} diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve_amd64.go b/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve_amd64.go new file mode 100644 index 0000000..8a3d54c --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve_amd64.go @@ -0,0 +1,30 @@ +//go:build amd64 && !purego +// +build amd64,!purego + +package x25519 + +import ( + fp "github.com/cloudflare/circl/math/fp25519" + "golang.org/x/sys/cpu" +) + +var hasBmi2Adx = cpu.X86.HasBMI2 && cpu.X86.HasADX + +var _ = hasBmi2Adx + +func double(x, z *fp.Elt) { doubleAmd64(x, z) } +func diffAdd(w *[5]fp.Elt, b uint) { diffAddAmd64(w, b) } +func ladderStep(w *[5]fp.Elt, b uint) { ladderStepAmd64(w, b) } +func mulA24(z, x *fp.Elt) { mulA24Amd64(z, x) } + +//go:noescape +func ladderStepAmd64(w *[5]fp.Elt, b uint) + +//go:noescape +func diffAddAmd64(w *[5]fp.Elt, b uint) + +//go:noescape +func doubleAmd64(x, z *fp.Elt) + +//go:noescape +func mulA24Amd64(z, x *fp.Elt) diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve_amd64.h b/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve_amd64.h new file mode 100644 index 0000000..8c1ae4d --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve_amd64.h @@ -0,0 +1,111 @@ +#define ladderStepLeg \ + addSub(x2,z2) \ + addSub(x3,z3) \ + integerMulLeg(b0,x2,z3) \ + integerMulLeg(b1,x3,z2) \ + reduceFromDoubleLeg(t0,b0) \ + reduceFromDoubleLeg(t1,b1) \ + addSub(t0,t1) \ + cselect(x2,x3,regMove) \ + cselect(z2,z3,regMove) \ + integerSqrLeg(b0,t0) \ + integerSqrLeg(b1,t1) \ + reduceFromDoubleLeg(x3,b0) \ + reduceFromDoubleLeg(z3,b1) \ + integerMulLeg(b0,x1,z3) \ + reduceFromDoubleLeg(z3,b0) \ + integerSqrLeg(b0,x2) \ + integerSqrLeg(b1,z2) \ + reduceFromDoubleLeg(x2,b0) \ + reduceFromDoubleLeg(z2,b1) \ + subtraction(t0,x2,z2) \ + multiplyA24Leg(t1,t0) \ + additionLeg(t1,t1,z2) \ + integerMulLeg(b0,x2,z2) \ + integerMulLeg(b1,t0,t1) \ + reduceFromDoubleLeg(x2,b0) \ + reduceFromDoubleLeg(z2,b1) + +#define ladderStepBmi2Adx \ + addSub(x2,z2) \ + addSub(x3,z3) \ + integerMulAdx(b0,x2,z3) \ + integerMulAdx(b1,x3,z2) \ + reduceFromDoubleAdx(t0,b0) \ + reduceFromDoubleAdx(t1,b1) \ + addSub(t0,t1) \ + cselect(x2,x3,regMove) \ + cselect(z2,z3,regMove) \ + integerSqrAdx(b0,t0) \ + integerSqrAdx(b1,t1) \ + reduceFromDoubleAdx(x3,b0) \ + reduceFromDoubleAdx(z3,b1) \ + integerMulAdx(b0,x1,z3) \ + reduceFromDoubleAdx(z3,b0) \ + integerSqrAdx(b0,x2) \ + integerSqrAdx(b1,z2) \ + reduceFromDoubleAdx(x2,b0) \ + reduceFromDoubleAdx(z2,b1) \ + subtraction(t0,x2,z2) \ + multiplyA24Adx(t1,t0) \ + additionAdx(t1,t1,z2) \ + integerMulAdx(b0,x2,z2) \ + integerMulAdx(b1,t0,t1) \ + reduceFromDoubleAdx(x2,b0) \ + reduceFromDoubleAdx(z2,b1) + +#define difAddLeg \ + addSub(x1,z1) \ + integerMulLeg(b0,z1,ui) \ + reduceFromDoubleLeg(z1,b0) \ + addSub(x1,z1) \ + integerSqrLeg(b0,x1) \ + integerSqrLeg(b1,z1) \ + reduceFromDoubleLeg(x1,b0) \ + reduceFromDoubleLeg(z1,b1) \ + integerMulLeg(b0,x1,z2) \ + integerMulLeg(b1,z1,x2) \ + reduceFromDoubleLeg(x1,b0) \ + reduceFromDoubleLeg(z1,b1) + +#define difAddBmi2Adx \ + addSub(x1,z1) \ + integerMulAdx(b0,z1,ui) \ + reduceFromDoubleAdx(z1,b0) \ + addSub(x1,z1) \ + integerSqrAdx(b0,x1) \ + integerSqrAdx(b1,z1) \ + reduceFromDoubleAdx(x1,b0) \ + reduceFromDoubleAdx(z1,b1) \ + integerMulAdx(b0,x1,z2) \ + integerMulAdx(b1,z1,x2) \ + reduceFromDoubleAdx(x1,b0) \ + reduceFromDoubleAdx(z1,b1) + +#define doubleLeg \ + addSub(x1,z1) \ + integerSqrLeg(b0,x1) \ + integerSqrLeg(b1,z1) \ + reduceFromDoubleLeg(x1,b0) \ + reduceFromDoubleLeg(z1,b1) \ + subtraction(t0,x1,z1) \ + multiplyA24Leg(t1,t0) \ + additionLeg(t1,t1,z1) \ + integerMulLeg(b0,x1,z1) \ + integerMulLeg(b1,t0,t1) \ + reduceFromDoubleLeg(x1,b0) \ + reduceFromDoubleLeg(z1,b1) + +#define doubleBmi2Adx \ + addSub(x1,z1) \ + integerSqrAdx(b0,x1) \ + integerSqrAdx(b1,z1) \ + reduceFromDoubleAdx(x1,b0) \ + reduceFromDoubleAdx(z1,b1) \ + subtraction(t0,x1,z1) \ + multiplyA24Adx(t1,t0) \ + additionAdx(t1,t1,z1) \ + integerMulAdx(b0,x1,z1) \ + integerMulAdx(b1,t0,t1) \ + reduceFromDoubleAdx(x1,b0) \ + reduceFromDoubleAdx(z1,b1) diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve_amd64.s b/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve_amd64.s new file mode 100644 index 0000000..ce9f062 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve_amd64.s @@ -0,0 +1,157 @@ +//go:build amd64 && !purego +// +build amd64,!purego + +#include "textflag.h" + +// Depends on circl/math/fp25519 package +#include "../../math/fp25519/fp_amd64.h" +#include "curve_amd64.h" + +// CTE_A24 is (A+2)/4 from Curve25519 +#define CTE_A24 121666 + +#define Size 32 + +// multiplyA24Leg multiplies x times CTE_A24 and stores in z +// Uses: AX, DX, R8-R13, FLAGS +// Instr: x86_64, cmov +#define multiplyA24Leg(z,x) \ + MOVL $CTE_A24, AX; MULQ 0+x; MOVQ AX, R8; MOVQ DX, R9; \ + MOVL $CTE_A24, AX; MULQ 8+x; MOVQ AX, R12; MOVQ DX, R10; \ + MOVL $CTE_A24, AX; MULQ 16+x; MOVQ AX, R13; MOVQ DX, R11; \ + MOVL $CTE_A24, AX; MULQ 24+x; \ + ADDQ R12, R9; \ + ADCQ R13, R10; \ + ADCQ AX, R11; \ + ADCQ $0, DX; \ + MOVL $38, AX; /* 2*C = 38 = 2^256 MOD 2^255-19*/ \ + IMULQ AX, DX; \ + ADDQ DX, R8; \ + ADCQ $0, R9; MOVQ R9, 8+z; \ + ADCQ $0, R10; MOVQ R10, 16+z; \ + ADCQ $0, R11; MOVQ R11, 24+z; \ + MOVQ $0, DX; \ + CMOVQCS AX, DX; \ + ADDQ DX, R8; MOVQ R8, 0+z; + +// multiplyA24Adx multiplies x times CTE_A24 and stores in z +// Uses: AX, DX, R8-R12, FLAGS +// Instr: x86_64, cmov, bmi2 +#define multiplyA24Adx(z,x) \ + MOVQ $CTE_A24, DX; \ + MULXQ 0+x, R8, R10; \ + MULXQ 8+x, R9, R11; ADDQ R10, R9; \ + MULXQ 16+x, R10, AX; ADCQ R11, R10; \ + MULXQ 24+x, R11, R12; ADCQ AX, R11; \ + ;;;;;;;;;;;;;;;;;;;;; ADCQ $0, R12; \ + MOVL $38, DX; /* 2*C = 38 = 2^256 MOD 2^255-19*/ \ + IMULQ DX, R12; \ + ADDQ R12, R8; \ + ADCQ $0, R9; MOVQ R9, 8+z; \ + ADCQ $0, R10; MOVQ R10, 16+z; \ + ADCQ $0, R11; MOVQ R11, 24+z; \ + MOVQ $0, R12; \ + CMOVQCS DX, R12; \ + ADDQ R12, R8; MOVQ R8, 0+z; + +#define mulA24Legacy \ + multiplyA24Leg(0(DI),0(SI)) +#define mulA24Bmi2Adx \ + multiplyA24Adx(0(DI),0(SI)) + +// func mulA24Amd64(z, x *fp255.Elt) +TEXT ·mulA24Amd64(SB),NOSPLIT,$0-16 + MOVQ z+0(FP), DI + MOVQ x+8(FP), SI + CHECK_BMI2ADX(LMA24, mulA24Legacy, mulA24Bmi2Adx) + + +// func ladderStepAmd64(w *[5]fp255.Elt, b uint) +// ladderStepAmd64 calculates a point addition and doubling as follows: +// (x2,z2) = 2*(x2,z2) and (x3,z3) = (x2,z2)+(x3,z3) using as a difference (x1,-). +// work = (x1,x2,z2,x3,z3) are five fp255.Elt of 32 bytes. +// stack = (t0,t1) are two fp.Elt of fp.Size bytes, and +// (b0,b1) are two-double precision fp.Elt of 2*fp.Size bytes. +TEXT ·ladderStepAmd64(SB),NOSPLIT,$192-16 + // Parameters + #define regWork DI + #define regMove SI + #define x1 0*Size(regWork) + #define x2 1*Size(regWork) + #define z2 2*Size(regWork) + #define x3 3*Size(regWork) + #define z3 4*Size(regWork) + // Local variables + #define t0 0*Size(SP) + #define t1 1*Size(SP) + #define b0 2*Size(SP) + #define b1 4*Size(SP) + MOVQ w+0(FP), regWork + MOVQ b+8(FP), regMove + CHECK_BMI2ADX(LLADSTEP, ladderStepLeg, ladderStepBmi2Adx) + #undef regWork + #undef regMove + #undef x1 + #undef x2 + #undef z2 + #undef x3 + #undef z3 + #undef t0 + #undef t1 + #undef b0 + #undef b1 + +// func diffAddAmd64(w *[5]fp255.Elt, b uint) +// diffAddAmd64 calculates a differential point addition using a precomputed point. +// (x1,z1) = (x1,z1)+(mu) using a difference point (x2,z2) +// w = (mu,x1,z1,x2,z2) are five fp.Elt, and +// stack = (b0,b1) are two-double precision fp.Elt of 2*fp.Size bytes. +TEXT ·diffAddAmd64(SB),NOSPLIT,$128-16 + // Parameters + #define regWork DI + #define regSwap SI + #define ui 0*Size(regWork) + #define x1 1*Size(regWork) + #define z1 2*Size(regWork) + #define x2 3*Size(regWork) + #define z2 4*Size(regWork) + // Local variables + #define b0 0*Size(SP) + #define b1 2*Size(SP) + MOVQ w+0(FP), regWork + MOVQ b+8(FP), regSwap + cswap(x1,x2,regSwap) + cswap(z1,z2,regSwap) + CHECK_BMI2ADX(LDIFADD, difAddLeg, difAddBmi2Adx) + #undef regWork + #undef regSwap + #undef ui + #undef x1 + #undef z1 + #undef x2 + #undef z2 + #undef b0 + #undef b1 + +// func doubleAmd64(x, z *fp255.Elt) +// doubleAmd64 calculates a point doubling (x1,z1) = 2*(x1,z1). +// stack = (t0,t1) are two fp.Elt of fp.Size bytes, and +// (b0,b1) are two-double precision fp.Elt of 2*fp.Size bytes. +TEXT ·doubleAmd64(SB),NOSPLIT,$192-16 + // Parameters + #define x1 0(DI) + #define z1 0(SI) + // Local variables + #define t0 0*Size(SP) + #define t1 1*Size(SP) + #define b0 2*Size(SP) + #define b1 4*Size(SP) + MOVQ x+0(FP), DI + MOVQ z+8(FP), SI + CHECK_BMI2ADX(LDOUB,doubleLeg,doubleBmi2Adx) + #undef x1 + #undef z1 + #undef t0 + #undef t1 + #undef b0 + #undef b1 diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve_generic.go b/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve_generic.go new file mode 100644 index 0000000..dae67ea --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve_generic.go @@ -0,0 +1,85 @@ +package x25519 + +import ( + "encoding/binary" + "math/bits" + + fp "github.com/cloudflare/circl/math/fp25519" +) + +func doubleGeneric(x, z *fp.Elt) { + t0, t1 := &fp.Elt{}, &fp.Elt{} + fp.AddSub(x, z) + fp.Sqr(x, x) + fp.Sqr(z, z) + fp.Sub(t0, x, z) + mulA24Generic(t1, t0) + fp.Add(t1, t1, z) + fp.Mul(x, x, z) + fp.Mul(z, t0, t1) +} + +func diffAddGeneric(w *[5]fp.Elt, b uint) { + mu, x1, z1, x2, z2 := &w[0], &w[1], &w[2], &w[3], &w[4] + fp.Cswap(x1, x2, b) + fp.Cswap(z1, z2, b) + fp.AddSub(x1, z1) + fp.Mul(z1, z1, mu) + fp.AddSub(x1, z1) + fp.Sqr(x1, x1) + fp.Sqr(z1, z1) + fp.Mul(x1, x1, z2) + fp.Mul(z1, z1, x2) +} + +func ladderStepGeneric(w *[5]fp.Elt, b uint) { + x1, x2, z2, x3, z3 := &w[0], &w[1], &w[2], &w[3], &w[4] + t0 := &fp.Elt{} + t1 := &fp.Elt{} + fp.AddSub(x2, z2) + fp.AddSub(x3, z3) + fp.Mul(t0, x2, z3) + fp.Mul(t1, x3, z2) + fp.AddSub(t0, t1) + fp.Cmov(x2, x3, b) + fp.Cmov(z2, z3, b) + fp.Sqr(x3, t0) + fp.Sqr(z3, t1) + fp.Mul(z3, x1, z3) + fp.Sqr(x2, x2) + fp.Sqr(z2, z2) + fp.Sub(t0, x2, z2) + mulA24Generic(t1, t0) + fp.Add(t1, t1, z2) + fp.Mul(x2, x2, z2) + fp.Mul(z2, t0, t1) +} + +func mulA24Generic(z, x *fp.Elt) { + const A24 = 121666 + const n = 8 + var xx [4]uint64 + for i := range xx { + xx[i] = binary.LittleEndian.Uint64(x[i*n : (i+1)*n]) + } + + h0, l0 := bits.Mul64(xx[0], A24) + h1, l1 := bits.Mul64(xx[1], A24) + h2, l2 := bits.Mul64(xx[2], A24) + h3, l3 := bits.Mul64(xx[3], A24) + + var c3 uint64 + l1, c0 := bits.Add64(h0, l1, 0) + l2, c1 := bits.Add64(h1, l2, c0) + l3, c2 := bits.Add64(h2, l3, c1) + l4, _ := bits.Add64(h3, 0, c2) + _, l4 = bits.Mul64(l4, 38) + l0, c0 = bits.Add64(l0, l4, 0) + xx[1], c1 = bits.Add64(l1, 0, c0) + xx[2], c2 = bits.Add64(l2, 0, c1) + xx[3], c3 = bits.Add64(l3, 0, c2) + xx[0], _ = bits.Add64(l0, (-c3)&38, 0) + for i := range xx { + binary.LittleEndian.PutUint64(z[i*n:(i+1)*n], xx[i]) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve_noasm.go b/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve_noasm.go new file mode 100644 index 0000000..07fab97 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x25519/curve_noasm.go @@ -0,0 +1,11 @@ +//go:build !amd64 || purego +// +build !amd64 purego + +package x25519 + +import fp "github.com/cloudflare/circl/math/fp25519" + +func double(x, z *fp.Elt) { doubleGeneric(x, z) } +func diffAdd(w *[5]fp.Elt, b uint) { diffAddGeneric(w, b) } +func ladderStep(w *[5]fp.Elt, b uint) { ladderStepGeneric(w, b) } +func mulA24(z, x *fp.Elt) { mulA24Generic(z, x) } diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x25519/doc.go b/backend/vendor/github.com/cloudflare/circl/dh/x25519/doc.go new file mode 100644 index 0000000..3ce102d --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x25519/doc.go @@ -0,0 +1,19 @@ +/* +Package x25519 provides Diffie-Hellman functions as specified in RFC-7748. + +Validation of public keys. + +The Diffie-Hellman function, as described in RFC-7748 [1], works for any +public key. However, if a different protocol requires contributory +behaviour [2,3], then the public keys must be validated against low-order +points [3,4]. To do that, the Shared function performs this validation +internally and returns false when the public key is invalid (i.e., it +is a low-order point). + +References: + - [1] RFC7748 by Langley, Hamburg, Turner (https://rfc-editor.org/rfc/rfc7748.txt) + - [2] Curve25519 by Bernstein (https://cr.yp.to/ecdh.html) + - [3] Bernstein (https://cr.yp.to/ecdh.html#validate) + - [4] Cremers&Jackson (https://eprint.iacr.org/2019/526) +*/ +package x25519 diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x25519/key.go b/backend/vendor/github.com/cloudflare/circl/dh/x25519/key.go new file mode 100644 index 0000000..c76f72a --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x25519/key.go @@ -0,0 +1,47 @@ +package x25519 + +import ( + "crypto/subtle" + + fp "github.com/cloudflare/circl/math/fp25519" +) + +// Size is the length in bytes of a X25519 key. +const Size = 32 + +// Key represents a X25519 key. +type Key [Size]byte + +func (k *Key) clamp(in *Key) *Key { + *k = *in + k[0] &= 248 + k[31] = (k[31] & 127) | 64 + return k +} + +// isValidPubKey verifies if the public key is not a low-order point. +func (k *Key) isValidPubKey() bool { + fp.Modp((*fp.Elt)(k)) + var isLowOrder int + for _, P := range lowOrderPoints { + isLowOrder |= subtle.ConstantTimeCompare(P[:], k[:]) + } + return isLowOrder == 0 +} + +// KeyGen obtains a public key given a secret key. +func KeyGen(public, secret *Key) { + ladderJoye(public.clamp(secret)) +} + +// Shared calculates Alice's shared key from Alice's secret key and Bob's +// public key returning true on success. A failure case happens when the public +// key is a low-order point, thus the shared key is all-zeros and the function +// returns false. +func Shared(shared, secret, public *Key) bool { + validPk := *public + validPk[31] &= (1 << (255 % 8)) - 1 + ok := validPk.isValidPubKey() + ladderMontgomery(shared.clamp(secret), &validPk) + return ok +} diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x25519/table.go b/backend/vendor/github.com/cloudflare/circl/dh/x25519/table.go new file mode 100644 index 0000000..28c8c4a --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x25519/table.go @@ -0,0 +1,268 @@ +package x25519 + +import "github.com/cloudflare/circl/math/fp25519" + +// tableGenerator contains the set of points: +// +// t[i] = (xi+1)/(xi-1), +// +// where (xi,yi) = 2^iG and G is the generator point +// Size = (256)*(256/8) = 8192 bytes. +var tableGenerator = [256 * fp25519.Size]byte{ + /* (2^ 0)P */ 0xf3, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x5f, + /* (2^ 1)P */ 0x96, 0xfe, 0xaa, 0x16, 0xf4, 0x20, 0x82, 0x6b, 0x34, 0x6a, 0x56, 0x4f, 0x2b, 0xeb, 0xeb, 0x82, 0x0f, 0x95, 0xa5, 0x75, 0xb0, 0xa5, 0xa9, 0xd5, 0xf4, 0x88, 0x24, 0x4b, 0xcf, 0xb2, 0x42, 0x51, + /* (2^ 2)P */ 0x0c, 0x68, 0x69, 0x00, 0x75, 0xbc, 0xae, 0x6a, 0x41, 0x9c, 0xf9, 0xa0, 0x20, 0x78, 0xcf, 0x89, 0xf4, 0xd0, 0x56, 0x3b, 0x18, 0xd9, 0x58, 0x2a, 0xa4, 0x11, 0x60, 0xe3, 0x80, 0xca, 0x5a, 0x4b, + /* (2^ 3)P */ 0x5d, 0x74, 0x29, 0x8c, 0x34, 0x32, 0x91, 0x32, 0xd7, 0x2f, 0x64, 0xe1, 0x16, 0xe6, 0xa2, 0xf4, 0x34, 0xbc, 0x67, 0xff, 0x03, 0xbb, 0x45, 0x1e, 0x4a, 0x9b, 0x2a, 0xf4, 0xd0, 0x12, 0x69, 0x30, + /* (2^ 4)P */ 0x54, 0x71, 0xaf, 0xe6, 0x07, 0x65, 0x88, 0xff, 0x2f, 0xc8, 0xee, 0xdf, 0x13, 0x0e, 0xf5, 0x04, 0xce, 0xb5, 0xba, 0x2a, 0xe8, 0x2f, 0x51, 0xaa, 0x22, 0xf2, 0xd5, 0x68, 0x1a, 0x25, 0x4e, 0x17, + /* (2^ 5)P */ 0x98, 0x88, 0x02, 0x82, 0x0d, 0x70, 0x96, 0xcf, 0xc5, 0x02, 0x2c, 0x0a, 0x37, 0xe3, 0x43, 0x17, 0xaa, 0x6e, 0xe8, 0xb4, 0x98, 0xec, 0x9e, 0x37, 0x2e, 0x48, 0xe0, 0x51, 0x8a, 0x88, 0x59, 0x0c, + /* (2^ 6)P */ 0x89, 0xd1, 0xb5, 0x99, 0xd6, 0xf1, 0xcb, 0xfb, 0x84, 0xdc, 0x9f, 0x8e, 0xd5, 0xf0, 0xae, 0xac, 0x14, 0x76, 0x1f, 0x23, 0x06, 0x0d, 0xc2, 0xc1, 0x72, 0xf9, 0x74, 0xa2, 0x8d, 0x21, 0x38, 0x29, + /* (2^ 7)P */ 0x18, 0x7f, 0x1d, 0xff, 0xbe, 0x49, 0xaf, 0xf6, 0xc2, 0xc9, 0x7a, 0x38, 0x22, 0x1c, 0x54, 0xcc, 0x6b, 0xc5, 0x15, 0x40, 0xef, 0xc9, 0xfc, 0x96, 0xa9, 0x13, 0x09, 0x69, 0x7c, 0x62, 0xc1, 0x69, + /* (2^ 8)P */ 0x0e, 0xdb, 0x33, 0x47, 0x2f, 0xfd, 0x86, 0x7a, 0xe9, 0x7d, 0x08, 0x9e, 0xf2, 0xc4, 0xb8, 0xfd, 0x29, 0xa2, 0xa2, 0x8e, 0x1a, 0x4b, 0x5e, 0x09, 0x79, 0x7a, 0xb3, 0x29, 0xc8, 0xa7, 0xd7, 0x1a, + /* (2^ 9)P */ 0xc0, 0xa0, 0x7e, 0xd1, 0xca, 0x89, 0x2d, 0x34, 0x51, 0x20, 0xed, 0xcc, 0xa6, 0xdd, 0xbe, 0x67, 0x74, 0x2f, 0xb4, 0x2b, 0xbf, 0x31, 0xca, 0x19, 0xbb, 0xac, 0x80, 0x49, 0xc8, 0xb4, 0xf7, 0x3d, + /* (2^ 10)P */ 0x83, 0xd8, 0x0a, 0xc8, 0x4d, 0x44, 0xc6, 0xa8, 0x85, 0xab, 0xe3, 0x66, 0x03, 0x44, 0x1e, 0xb9, 0xd8, 0xf6, 0x64, 0x01, 0xa0, 0xcd, 0x15, 0xc2, 0x68, 0xe6, 0x47, 0xf2, 0x6e, 0x7c, 0x86, 0x3d, + /* (2^ 11)P */ 0x8c, 0x65, 0x3e, 0xcc, 0x2b, 0x58, 0xdd, 0xc7, 0x28, 0x55, 0x0e, 0xee, 0x48, 0x47, 0x2c, 0xfd, 0x71, 0x4f, 0x9f, 0xcc, 0x95, 0x9b, 0xfd, 0xa0, 0xdf, 0x5d, 0x67, 0xb0, 0x71, 0xd8, 0x29, 0x75, + /* (2^ 12)P */ 0x78, 0xbd, 0x3c, 0x2d, 0xb4, 0x68, 0xf5, 0xb8, 0x82, 0xda, 0xf3, 0x91, 0x1b, 0x01, 0x33, 0x12, 0x62, 0x3b, 0x7c, 0x4a, 0xcd, 0x6c, 0xce, 0x2d, 0x03, 0x86, 0x49, 0x9e, 0x8e, 0xfc, 0xe7, 0x75, + /* (2^ 13)P */ 0xec, 0xb6, 0xd0, 0xfc, 0xf1, 0x13, 0x4f, 0x2f, 0x45, 0x7a, 0xff, 0x29, 0x1f, 0xca, 0xa8, 0xf1, 0x9b, 0xe2, 0x81, 0x29, 0xa7, 0xc1, 0x49, 0xc2, 0x6a, 0xb5, 0x83, 0x8c, 0xbb, 0x0d, 0xbe, 0x6e, + /* (2^ 14)P */ 0x22, 0xb2, 0x0b, 0x17, 0x8d, 0xfa, 0x14, 0x71, 0x5f, 0x93, 0x93, 0xbf, 0xd5, 0xdc, 0xa2, 0x65, 0x9a, 0x97, 0x9c, 0xb5, 0x68, 0x1f, 0xc4, 0xbd, 0x89, 0x92, 0xce, 0xa2, 0x79, 0xef, 0x0e, 0x2f, + /* (2^ 15)P */ 0xce, 0x37, 0x3c, 0x08, 0x0c, 0xbf, 0xec, 0x42, 0x22, 0x63, 0x49, 0xec, 0x09, 0xbc, 0x30, 0x29, 0x0d, 0xac, 0xfe, 0x9c, 0xc1, 0xb0, 0x94, 0xf2, 0x80, 0xbb, 0xfa, 0xed, 0x4b, 0xaa, 0x80, 0x37, + /* (2^ 16)P */ 0x29, 0xd9, 0xea, 0x7c, 0x3e, 0x7d, 0xc1, 0x56, 0xc5, 0x22, 0x57, 0x2e, 0xeb, 0x4b, 0xcb, 0xe7, 0x5a, 0xe1, 0xbf, 0x2d, 0x73, 0x31, 0xe9, 0x0c, 0xf8, 0x52, 0x10, 0x62, 0xc7, 0x83, 0xb8, 0x41, + /* (2^ 17)P */ 0x50, 0x53, 0xd2, 0xc3, 0xa0, 0x5c, 0xf7, 0xdb, 0x51, 0xe3, 0xb1, 0x6e, 0x08, 0xbe, 0x36, 0x29, 0x12, 0xb2, 0xa9, 0xb4, 0x3c, 0xe0, 0x36, 0xc9, 0xaa, 0x25, 0x22, 0x32, 0x82, 0xbf, 0x45, 0x1d, + /* (2^ 18)P */ 0xc5, 0x4c, 0x02, 0x6a, 0x03, 0xb1, 0x1a, 0xe8, 0x72, 0x9a, 0x4c, 0x30, 0x1c, 0x20, 0x12, 0xe2, 0xfc, 0xb1, 0x32, 0x68, 0xba, 0x3f, 0xd7, 0xc5, 0x81, 0x95, 0x83, 0x4d, 0x5a, 0xdb, 0xff, 0x20, + /* (2^ 19)P */ 0xad, 0x0f, 0x5d, 0xbe, 0x67, 0xd3, 0x83, 0xa2, 0x75, 0x44, 0x16, 0x8b, 0xca, 0x25, 0x2b, 0x6c, 0x2e, 0xf2, 0xaa, 0x7c, 0x46, 0x35, 0x49, 0x9d, 0x49, 0xff, 0x85, 0xee, 0x8e, 0x40, 0x66, 0x51, + /* (2^ 20)P */ 0x61, 0xe3, 0xb4, 0xfa, 0xa2, 0xba, 0x67, 0x3c, 0xef, 0x5c, 0xf3, 0x7e, 0xc6, 0x33, 0xe4, 0xb3, 0x1c, 0x9b, 0x15, 0x41, 0x92, 0x72, 0x59, 0x52, 0x33, 0xab, 0xb0, 0xd5, 0x92, 0x18, 0x62, 0x6a, + /* (2^ 21)P */ 0xcb, 0xcd, 0x55, 0x75, 0x38, 0x4a, 0xb7, 0x20, 0x3f, 0x92, 0x08, 0x12, 0x0e, 0xa1, 0x2a, 0x53, 0xd1, 0x1d, 0x28, 0x62, 0x77, 0x7b, 0xa1, 0xea, 0xbf, 0x44, 0x5c, 0xf0, 0x43, 0x34, 0xab, 0x61, + /* (2^ 22)P */ 0xf8, 0xde, 0x24, 0x23, 0x42, 0x6c, 0x7a, 0x25, 0x7f, 0xcf, 0xe3, 0x17, 0x10, 0x6c, 0x1c, 0x13, 0x57, 0xa2, 0x30, 0xf6, 0x39, 0x87, 0x75, 0x23, 0x80, 0x85, 0xa7, 0x01, 0x7a, 0x40, 0x5a, 0x29, + /* (2^ 23)P */ 0xd9, 0xa8, 0x5d, 0x6d, 0x24, 0x43, 0xc4, 0xf8, 0x5d, 0xfa, 0x52, 0x0c, 0x45, 0x75, 0xd7, 0x19, 0x3d, 0xf8, 0x1b, 0x73, 0x92, 0xfc, 0xfc, 0x2a, 0x00, 0x47, 0x2b, 0x1b, 0xe8, 0xc8, 0x10, 0x7d, + /* (2^ 24)P */ 0x0b, 0xa2, 0xba, 0x70, 0x1f, 0x27, 0xe0, 0xc8, 0x57, 0x39, 0xa6, 0x7c, 0x86, 0x48, 0x37, 0x99, 0xbb, 0xd4, 0x7e, 0xcb, 0xb3, 0xef, 0x12, 0x54, 0x75, 0x29, 0xe6, 0x73, 0x61, 0xd3, 0x96, 0x31, + /* (2^ 25)P */ 0xfc, 0xdf, 0xc7, 0x41, 0xd1, 0xca, 0x5b, 0xde, 0x48, 0xc8, 0x95, 0xb3, 0xd2, 0x8c, 0xcc, 0x47, 0xcb, 0xf3, 0x1a, 0xe1, 0x42, 0xd9, 0x4c, 0xa3, 0xc2, 0xce, 0x4e, 0xd0, 0xf2, 0xdb, 0x56, 0x02, + /* (2^ 26)P */ 0x7f, 0x66, 0x0e, 0x4b, 0xe9, 0xb7, 0x5a, 0x87, 0x10, 0x0d, 0x85, 0xc0, 0x83, 0xdd, 0xd4, 0xca, 0x9f, 0xc7, 0x72, 0x4e, 0x8f, 0x2e, 0xf1, 0x47, 0x9b, 0xb1, 0x85, 0x8c, 0xbb, 0x87, 0x1a, 0x5f, + /* (2^ 27)P */ 0xb8, 0x51, 0x7f, 0x43, 0xb6, 0xd0, 0xe9, 0x7a, 0x65, 0x90, 0x87, 0x18, 0x55, 0xce, 0xc7, 0x12, 0xee, 0x7a, 0xf7, 0x5c, 0xfe, 0x09, 0xde, 0x2a, 0x27, 0x56, 0x2c, 0x7d, 0x2f, 0x5a, 0xa0, 0x23, + /* (2^ 28)P */ 0x9a, 0x16, 0x7c, 0xf1, 0x28, 0xe1, 0x08, 0x59, 0x2d, 0x85, 0xd0, 0x8a, 0xdd, 0x98, 0x74, 0xf7, 0x64, 0x2f, 0x10, 0xab, 0xce, 0xc4, 0xb4, 0x74, 0x45, 0x98, 0x13, 0x10, 0xdd, 0xba, 0x3a, 0x18, + /* (2^ 29)P */ 0xac, 0xaa, 0x92, 0xaa, 0x8d, 0xba, 0x65, 0xb1, 0x05, 0x67, 0x38, 0x99, 0x95, 0xef, 0xc5, 0xd5, 0xd1, 0x40, 0xfc, 0xf8, 0x0c, 0x8f, 0x2f, 0xbe, 0x14, 0x45, 0x20, 0xee, 0x35, 0xe6, 0x01, 0x27, + /* (2^ 30)P */ 0x14, 0x65, 0x15, 0x20, 0x00, 0xa8, 0x9f, 0x62, 0xce, 0xc1, 0xa8, 0x64, 0x87, 0x86, 0x23, 0xf2, 0x0e, 0x06, 0x3f, 0x0b, 0xff, 0x4f, 0x89, 0x5b, 0xfa, 0xa3, 0x08, 0xf7, 0x4c, 0x94, 0xd9, 0x60, + /* (2^ 31)P */ 0x1f, 0x20, 0x7a, 0x1c, 0x1a, 0x00, 0xea, 0xae, 0x63, 0xce, 0xe2, 0x3e, 0x63, 0x6a, 0xf1, 0xeb, 0xe1, 0x07, 0x7a, 0x4c, 0x59, 0x09, 0x77, 0x6f, 0xcb, 0x08, 0x02, 0x0d, 0x15, 0x58, 0xb9, 0x79, + /* (2^ 32)P */ 0xe7, 0x10, 0xd4, 0x01, 0x53, 0x5e, 0xb5, 0x24, 0x4d, 0xc8, 0xfd, 0xf3, 0xdf, 0x4e, 0xa3, 0xe3, 0xd8, 0x32, 0x40, 0x90, 0xe4, 0x68, 0x87, 0xd8, 0xec, 0xae, 0x3a, 0x7b, 0x42, 0x84, 0x13, 0x13, + /* (2^ 33)P */ 0x14, 0x4f, 0x23, 0x86, 0x12, 0xe5, 0x05, 0x84, 0x29, 0xc5, 0xb4, 0xad, 0x39, 0x47, 0xdc, 0x14, 0xfd, 0x4f, 0x63, 0x50, 0xb2, 0xb5, 0xa2, 0xb8, 0x93, 0xff, 0xa7, 0xd8, 0x4a, 0xa9, 0xe2, 0x2f, + /* (2^ 34)P */ 0xdd, 0xfa, 0x43, 0xe8, 0xef, 0x57, 0x5c, 0xec, 0x18, 0x99, 0xbb, 0xf0, 0x40, 0xce, 0x43, 0x28, 0x05, 0x63, 0x3d, 0xcf, 0xd6, 0x61, 0xb5, 0xa4, 0x7e, 0x77, 0xfb, 0xe8, 0xbd, 0x29, 0x36, 0x74, + /* (2^ 35)P */ 0x8f, 0x73, 0xaf, 0xbb, 0x46, 0xdd, 0x3e, 0x34, 0x51, 0xa6, 0x01, 0xb1, 0x28, 0x18, 0x98, 0xed, 0x7a, 0x79, 0x2c, 0x88, 0x0b, 0x76, 0x01, 0xa4, 0x30, 0x87, 0xc8, 0x8d, 0xe2, 0x23, 0xc2, 0x1f, + /* (2^ 36)P */ 0x0e, 0xba, 0x0f, 0xfc, 0x91, 0x4e, 0x60, 0x48, 0xa4, 0x6f, 0x2c, 0x05, 0x8f, 0xf7, 0x37, 0xb6, 0x9c, 0x23, 0xe9, 0x09, 0x3d, 0xac, 0xcc, 0x91, 0x7c, 0x68, 0x7a, 0x43, 0xd4, 0xee, 0xf7, 0x23, + /* (2^ 37)P */ 0x00, 0xd8, 0x9b, 0x8d, 0x11, 0xb1, 0x73, 0x51, 0xa7, 0xd4, 0x89, 0x31, 0xb6, 0x41, 0xd6, 0x29, 0x86, 0xc5, 0xbb, 0x88, 0x79, 0x17, 0xbf, 0xfd, 0xf5, 0x1d, 0xd8, 0xca, 0x4f, 0x89, 0x59, 0x29, + /* (2^ 38)P */ 0x99, 0xc8, 0xbb, 0xb4, 0xf3, 0x8e, 0xbc, 0xae, 0xb9, 0x92, 0x69, 0xb2, 0x5a, 0x99, 0x48, 0x41, 0xfb, 0x2c, 0xf9, 0x34, 0x01, 0x0b, 0xe2, 0x24, 0xe8, 0xde, 0x05, 0x4a, 0x89, 0x58, 0xd1, 0x40, + /* (2^ 39)P */ 0xf6, 0x76, 0xaf, 0x85, 0x11, 0x0b, 0xb0, 0x46, 0x79, 0x7a, 0x18, 0x73, 0x78, 0xc7, 0xba, 0x26, 0x5f, 0xff, 0x8f, 0xab, 0x95, 0xbf, 0xc0, 0x3d, 0xd7, 0x24, 0x55, 0x94, 0xd8, 0x8b, 0x60, 0x2a, + /* (2^ 40)P */ 0x02, 0x63, 0x44, 0xbd, 0x88, 0x95, 0x44, 0x26, 0x9c, 0x43, 0x88, 0x03, 0x1c, 0xc2, 0x4b, 0x7c, 0xb2, 0x11, 0xbd, 0x83, 0xf3, 0xa4, 0x98, 0x8e, 0xb9, 0x76, 0xd8, 0xc9, 0x7b, 0x8d, 0x21, 0x26, + /* (2^ 41)P */ 0x8a, 0x17, 0x7c, 0x99, 0x42, 0x15, 0x08, 0xe3, 0x6f, 0x60, 0xb6, 0x6f, 0xa8, 0x29, 0x2d, 0x3c, 0x74, 0x93, 0x27, 0xfa, 0x36, 0x77, 0x21, 0x5c, 0xfa, 0xb1, 0xfe, 0x4a, 0x73, 0x05, 0xde, 0x7d, + /* (2^ 42)P */ 0xab, 0x2b, 0xd4, 0x06, 0x39, 0x0e, 0xf1, 0x3b, 0x9c, 0x64, 0x80, 0x19, 0x3e, 0x80, 0xf7, 0xe4, 0x7a, 0xbf, 0x95, 0x95, 0xf8, 0x3b, 0x05, 0xe6, 0x30, 0x55, 0x24, 0xda, 0x38, 0xaf, 0x4f, 0x39, + /* (2^ 43)P */ 0xf4, 0x28, 0x69, 0x89, 0x58, 0xfb, 0x8e, 0x7a, 0x3c, 0x11, 0x6a, 0xcc, 0xe9, 0x78, 0xc7, 0xfb, 0x6f, 0x59, 0xaf, 0x30, 0xe3, 0x0c, 0x67, 0x72, 0xf7, 0x6c, 0x3d, 0x1d, 0xa8, 0x22, 0xf2, 0x48, + /* (2^ 44)P */ 0xa7, 0xca, 0x72, 0x0d, 0x41, 0xce, 0x1f, 0xf0, 0x95, 0x55, 0x3b, 0x21, 0xc7, 0xec, 0x20, 0x5a, 0x83, 0x14, 0xfa, 0xc1, 0x65, 0x11, 0xc2, 0x7b, 0x41, 0xa7, 0xa8, 0x1d, 0xe3, 0x9a, 0xf8, 0x07, + /* (2^ 45)P */ 0xf9, 0x0f, 0x83, 0xc6, 0xb4, 0xc2, 0xd2, 0x05, 0x93, 0x62, 0x31, 0xc6, 0x0f, 0x33, 0x3e, 0xd4, 0x04, 0xa9, 0xd3, 0x96, 0x0a, 0x59, 0xa5, 0xa5, 0xb6, 0x33, 0x53, 0xa6, 0x91, 0xdb, 0x5e, 0x70, + /* (2^ 46)P */ 0xf7, 0xa5, 0xb9, 0x0b, 0x5e, 0xe1, 0x8e, 0x04, 0x5d, 0xaf, 0x0a, 0x9e, 0xca, 0xcf, 0x40, 0x32, 0x0b, 0xa4, 0xc4, 0xed, 0xce, 0x71, 0x4b, 0x8f, 0x6d, 0x4a, 0x54, 0xde, 0xa3, 0x0d, 0x1c, 0x62, + /* (2^ 47)P */ 0x91, 0x40, 0x8c, 0xa0, 0x36, 0x28, 0x87, 0x92, 0x45, 0x14, 0xc9, 0x10, 0xb0, 0x75, 0x83, 0xce, 0x94, 0x63, 0x27, 0x4f, 0x52, 0xeb, 0x72, 0x8a, 0x35, 0x36, 0xc8, 0x7e, 0xfa, 0xfc, 0x67, 0x26, + /* (2^ 48)P */ 0x2a, 0x75, 0xe8, 0x45, 0x33, 0x17, 0x4c, 0x7f, 0xa5, 0x79, 0x70, 0xee, 0xfe, 0x47, 0x1b, 0x06, 0x34, 0xff, 0x86, 0x9f, 0xfa, 0x9a, 0xdd, 0x25, 0x9c, 0xc8, 0x5d, 0x42, 0xf5, 0xce, 0x80, 0x37, + /* (2^ 49)P */ 0xe9, 0xb4, 0x3b, 0x51, 0x5a, 0x03, 0x46, 0x1a, 0xda, 0x5a, 0x57, 0xac, 0x79, 0xf3, 0x1e, 0x3e, 0x50, 0x4b, 0xa2, 0x5f, 0x1c, 0x5f, 0x8c, 0xc7, 0x22, 0x9f, 0xfd, 0x34, 0x76, 0x96, 0x1a, 0x32, + /* (2^ 50)P */ 0xfa, 0x27, 0x6e, 0x82, 0xb8, 0x07, 0x67, 0x94, 0xd0, 0x6f, 0x50, 0x4c, 0xd6, 0x84, 0xca, 0x3d, 0x36, 0x14, 0xe9, 0x75, 0x80, 0x21, 0x89, 0xc1, 0x84, 0x84, 0x3b, 0x9b, 0x16, 0x84, 0x92, 0x6d, + /* (2^ 51)P */ 0xdf, 0x2d, 0x3f, 0x38, 0x40, 0xe8, 0x67, 0x3a, 0x75, 0x9b, 0x4f, 0x0c, 0xa3, 0xc9, 0xee, 0x33, 0x47, 0xef, 0x83, 0xa7, 0x6f, 0xc8, 0xc7, 0x3e, 0xc4, 0xfb, 0xc9, 0xba, 0x9f, 0x44, 0xec, 0x26, + /* (2^ 52)P */ 0x7d, 0x9e, 0x9b, 0xa0, 0xcb, 0x38, 0x0f, 0x5c, 0x8c, 0x47, 0xa3, 0x62, 0xc7, 0x8c, 0x16, 0x81, 0x1c, 0x12, 0xfc, 0x06, 0xd3, 0xb0, 0x23, 0x3e, 0xdd, 0xdc, 0xef, 0xa5, 0xa0, 0x8a, 0x23, 0x5a, + /* (2^ 53)P */ 0xff, 0x43, 0xea, 0xc4, 0x21, 0x61, 0xa2, 0x1b, 0xb5, 0x32, 0x88, 0x7c, 0x7f, 0xc7, 0xf8, 0x36, 0x9a, 0xf9, 0xdc, 0x0a, 0x0b, 0xea, 0xfb, 0x88, 0xf9, 0xeb, 0x5b, 0xc2, 0x8e, 0x93, 0xa9, 0x5c, + /* (2^ 54)P */ 0xa0, 0xcd, 0xfc, 0x51, 0x5e, 0x6a, 0x43, 0xd5, 0x3b, 0x89, 0xcd, 0xc2, 0x97, 0x47, 0xbc, 0x1d, 0x08, 0x4a, 0x22, 0xd3, 0x65, 0x6a, 0x34, 0x19, 0x66, 0xf4, 0x9a, 0x9b, 0xe4, 0x34, 0x50, 0x0f, + /* (2^ 55)P */ 0x6e, 0xb9, 0xe0, 0xa1, 0x67, 0x39, 0x3c, 0xf2, 0x88, 0x4d, 0x7a, 0x86, 0xfa, 0x08, 0x8b, 0xe5, 0x79, 0x16, 0x34, 0xa7, 0xc6, 0xab, 0x2f, 0xfb, 0x46, 0x69, 0x02, 0xb6, 0x1e, 0x38, 0x75, 0x2a, + /* (2^ 56)P */ 0xac, 0x20, 0x94, 0xc1, 0xe4, 0x3b, 0x0a, 0xc8, 0xdc, 0xb6, 0xf2, 0x81, 0xc6, 0xf6, 0xb1, 0x66, 0x88, 0x33, 0xe9, 0x61, 0x67, 0x03, 0xf7, 0x7c, 0xc4, 0xa4, 0x60, 0xa6, 0xd8, 0xbb, 0xab, 0x25, + /* (2^ 57)P */ 0x98, 0x51, 0xfd, 0x14, 0xba, 0x12, 0xea, 0x91, 0xa9, 0xff, 0x3c, 0x4a, 0xfc, 0x50, 0x49, 0x68, 0x28, 0xad, 0xf5, 0x30, 0x21, 0x84, 0x26, 0xf8, 0x41, 0xa4, 0x01, 0x53, 0xf7, 0x88, 0xa9, 0x3e, + /* (2^ 58)P */ 0x6f, 0x8c, 0x5f, 0x69, 0x9a, 0x10, 0x78, 0xc9, 0xf3, 0xc3, 0x30, 0x05, 0x4a, 0xeb, 0x46, 0x17, 0x95, 0x99, 0x45, 0xb4, 0x77, 0x6d, 0x4d, 0x44, 0xc7, 0x5c, 0x4e, 0x05, 0x8c, 0x2b, 0x95, 0x75, + /* (2^ 59)P */ 0xaa, 0xd6, 0xf4, 0x15, 0x79, 0x3f, 0x70, 0xa3, 0xd8, 0x47, 0x26, 0x2f, 0x20, 0x46, 0xc3, 0x66, 0x4b, 0x64, 0x1d, 0x81, 0xdf, 0x69, 0x14, 0xd0, 0x1f, 0xd7, 0xa5, 0x81, 0x7d, 0xa4, 0xfe, 0x77, + /* (2^ 60)P */ 0x81, 0xa3, 0x7c, 0xf5, 0x9e, 0x52, 0xe9, 0xc5, 0x1a, 0x88, 0x2f, 0xce, 0xb9, 0xb4, 0xee, 0x6e, 0xd6, 0x9b, 0x00, 0xe8, 0x28, 0x1a, 0xe9, 0xb6, 0xec, 0x3f, 0xfc, 0x9a, 0x3e, 0xbe, 0x80, 0x4b, + /* (2^ 61)P */ 0xc5, 0xd2, 0xae, 0x26, 0xc5, 0x73, 0x37, 0x7e, 0x9d, 0xa4, 0xc9, 0x53, 0xb4, 0xfc, 0x4a, 0x1b, 0x4d, 0xb2, 0xff, 0xba, 0xd7, 0xbd, 0x20, 0xa9, 0x0e, 0x40, 0x2d, 0x12, 0x9f, 0x69, 0x54, 0x7c, + /* (2^ 62)P */ 0xc8, 0x4b, 0xa9, 0x4f, 0xe1, 0xc8, 0x46, 0xef, 0x5e, 0xed, 0x52, 0x29, 0xce, 0x74, 0xb0, 0xe0, 0xd5, 0x85, 0xd8, 0xdb, 0xe1, 0x50, 0xa4, 0xbe, 0x2c, 0x71, 0x0f, 0x32, 0x49, 0x86, 0xb6, 0x61, + /* (2^ 63)P */ 0xd1, 0xbd, 0xcc, 0x09, 0x73, 0x5f, 0x48, 0x8a, 0x2d, 0x1a, 0x4d, 0x7d, 0x0d, 0x32, 0x06, 0xbd, 0xf4, 0xbe, 0x2d, 0x32, 0x73, 0x29, 0x23, 0x25, 0x70, 0xf7, 0x17, 0x8c, 0x75, 0xc4, 0x5d, 0x44, + /* (2^ 64)P */ 0x3c, 0x93, 0xc8, 0x7c, 0x17, 0x34, 0x04, 0xdb, 0x9f, 0x05, 0xea, 0x75, 0x21, 0xe8, 0x6f, 0xed, 0x34, 0xdb, 0x53, 0xc0, 0xfd, 0xbe, 0xfe, 0x1e, 0x99, 0xaf, 0x5d, 0xc6, 0x67, 0xe8, 0xdb, 0x4a, + /* (2^ 65)P */ 0xdf, 0x09, 0x06, 0xa9, 0xa2, 0x71, 0xcd, 0x3a, 0x50, 0x40, 0xd0, 0x6d, 0x85, 0x91, 0xe9, 0xe5, 0x3c, 0xc2, 0x57, 0x81, 0x68, 0x9b, 0xc6, 0x1e, 0x4d, 0xfe, 0x5c, 0x88, 0xf6, 0x27, 0x74, 0x69, + /* (2^ 66)P */ 0x51, 0xa8, 0xe1, 0x65, 0x9b, 0x7b, 0xbe, 0xd7, 0xdd, 0x36, 0xc5, 0x22, 0xd5, 0x28, 0x3d, 0xa0, 0x45, 0xb6, 0xd2, 0x8f, 0x65, 0x9d, 0x39, 0x28, 0xe1, 0x41, 0x26, 0x7c, 0xe1, 0xb7, 0xe5, 0x49, + /* (2^ 67)P */ 0xa4, 0x57, 0x04, 0x70, 0x98, 0x3a, 0x8c, 0x6f, 0x78, 0x67, 0xbb, 0x5e, 0xa2, 0xf0, 0x78, 0x50, 0x0f, 0x96, 0x82, 0xc3, 0xcb, 0x3c, 0x3c, 0xd1, 0xb1, 0x84, 0xdf, 0xa7, 0x58, 0x32, 0x00, 0x2e, + /* (2^ 68)P */ 0x1c, 0x6a, 0x29, 0xe6, 0x9b, 0xf3, 0xd1, 0x8a, 0xb2, 0xbf, 0x5f, 0x2a, 0x65, 0xaa, 0xee, 0xc1, 0xcb, 0xf3, 0x26, 0xfd, 0x73, 0x06, 0xee, 0x33, 0xcc, 0x2c, 0x9d, 0xa6, 0x73, 0x61, 0x25, 0x59, + /* (2^ 69)P */ 0x41, 0xfc, 0x18, 0x4e, 0xaa, 0x07, 0xea, 0x41, 0x1e, 0xa5, 0x87, 0x7c, 0x52, 0x19, 0xfc, 0xd9, 0x6f, 0xca, 0x31, 0x58, 0x80, 0xcb, 0xaa, 0xbd, 0x4f, 0x69, 0x16, 0xc9, 0x2d, 0x65, 0x5b, 0x44, + /* (2^ 70)P */ 0x15, 0x23, 0x17, 0xf2, 0xa7, 0xa3, 0x92, 0xce, 0x64, 0x99, 0x1b, 0xe1, 0x2d, 0x28, 0xdc, 0x1e, 0x4a, 0x31, 0x4c, 0xe0, 0xaf, 0x3a, 0x82, 0xa1, 0x86, 0xf5, 0x7c, 0x43, 0x94, 0x2d, 0x0a, 0x79, + /* (2^ 71)P */ 0x09, 0xe0, 0xf6, 0x93, 0xfb, 0x47, 0xc4, 0x71, 0x76, 0x52, 0x84, 0x22, 0x67, 0xa5, 0x22, 0x89, 0x69, 0x51, 0x4f, 0x20, 0x3b, 0x90, 0x70, 0xbf, 0xfe, 0x19, 0xa3, 0x1b, 0x89, 0x89, 0x7a, 0x2f, + /* (2^ 72)P */ 0x0c, 0x14, 0xe2, 0x77, 0xb5, 0x8e, 0xa0, 0x02, 0xf4, 0xdc, 0x7b, 0x42, 0xd4, 0x4e, 0x9a, 0xed, 0xd1, 0x3c, 0x32, 0xe4, 0x44, 0xec, 0x53, 0x52, 0x5b, 0x35, 0xe9, 0x14, 0x3c, 0x36, 0x88, 0x3e, + /* (2^ 73)P */ 0x8c, 0x0b, 0x11, 0x77, 0x42, 0xc1, 0x66, 0xaa, 0x90, 0x33, 0xa2, 0x10, 0x16, 0x39, 0xe0, 0x1a, 0xa2, 0xc2, 0x3f, 0xc9, 0x12, 0xbd, 0x30, 0x20, 0xab, 0xc7, 0x55, 0x95, 0x57, 0x41, 0xe1, 0x3e, + /* (2^ 74)P */ 0x41, 0x7d, 0x6e, 0x6d, 0x3a, 0xde, 0x14, 0x92, 0xfe, 0x7e, 0xf1, 0x07, 0x86, 0xd8, 0xcd, 0x3c, 0x17, 0x12, 0xe1, 0xf8, 0x88, 0x12, 0x4f, 0x67, 0xd0, 0x93, 0x9f, 0x32, 0x0f, 0x25, 0x82, 0x56, + /* (2^ 75)P */ 0x6e, 0x39, 0x2e, 0x6d, 0x13, 0x0b, 0xf0, 0x6c, 0xbf, 0xde, 0x14, 0x10, 0x6f, 0xf8, 0x4c, 0x6e, 0x83, 0x4e, 0xcc, 0xbf, 0xb5, 0xb1, 0x30, 0x59, 0xb6, 0x16, 0xba, 0x8a, 0xb4, 0x69, 0x70, 0x04, + /* (2^ 76)P */ 0x93, 0x07, 0xb2, 0x69, 0xab, 0xe4, 0x4c, 0x0d, 0x9e, 0xfb, 0xd0, 0x97, 0x1a, 0xb9, 0x4d, 0xb2, 0x1d, 0xd0, 0x00, 0x4e, 0xf5, 0x50, 0xfa, 0xcd, 0xb5, 0xdd, 0x8b, 0x36, 0x85, 0x10, 0x1b, 0x22, + /* (2^ 77)P */ 0xd2, 0xd8, 0xe3, 0xb1, 0x68, 0x94, 0xe5, 0xe7, 0x93, 0x2f, 0x12, 0xbd, 0x63, 0x65, 0xc5, 0x53, 0x09, 0x3f, 0x66, 0xe0, 0x03, 0xa9, 0xe8, 0xee, 0x42, 0x3d, 0xbe, 0xcb, 0x62, 0xa6, 0xef, 0x61, + /* (2^ 78)P */ 0x2a, 0xab, 0x6e, 0xde, 0xdd, 0xdd, 0xf8, 0x2c, 0x31, 0xf2, 0x35, 0x14, 0xd5, 0x0a, 0xf8, 0x9b, 0x73, 0x49, 0xf0, 0xc9, 0xce, 0xda, 0xea, 0x5d, 0x27, 0x9b, 0xd2, 0x41, 0x5d, 0x5b, 0x27, 0x29, + /* (2^ 79)P */ 0x4f, 0xf1, 0xeb, 0x95, 0x08, 0x0f, 0xde, 0xcf, 0xa7, 0x05, 0x49, 0x05, 0x6b, 0xb9, 0xaa, 0xb9, 0xfd, 0x20, 0xc4, 0xa1, 0xd9, 0x0d, 0xe8, 0xca, 0xc7, 0xbb, 0x73, 0x16, 0x2f, 0xbf, 0x63, 0x0a, + /* (2^ 80)P */ 0x8c, 0xbc, 0x8f, 0x95, 0x11, 0x6e, 0x2f, 0x09, 0xad, 0x2f, 0x82, 0x04, 0xe8, 0x81, 0x2a, 0x67, 0x17, 0x25, 0xd5, 0x60, 0x15, 0x35, 0xc8, 0xca, 0xf8, 0x92, 0xf1, 0xc8, 0x22, 0x77, 0x3f, 0x6f, + /* (2^ 81)P */ 0xb7, 0x94, 0xe8, 0xc2, 0xcc, 0x90, 0xba, 0xf8, 0x0d, 0x9f, 0xff, 0x38, 0xa4, 0x57, 0x75, 0x2c, 0x59, 0x23, 0xe5, 0x5a, 0x85, 0x1d, 0x4d, 0x89, 0x69, 0x3d, 0x74, 0x7b, 0x15, 0x22, 0xe1, 0x68, + /* (2^ 82)P */ 0xf3, 0x19, 0xb9, 0xcf, 0x70, 0x55, 0x7e, 0xd8, 0xb9, 0x8d, 0x79, 0x95, 0xcd, 0xde, 0x2c, 0x3f, 0xce, 0xa2, 0xc0, 0x10, 0x47, 0x15, 0x21, 0x21, 0xb2, 0xc5, 0x6d, 0x24, 0x15, 0xa1, 0x66, 0x3c, + /* (2^ 83)P */ 0x72, 0xcb, 0x4e, 0x29, 0x62, 0xc5, 0xed, 0xcb, 0x16, 0x0b, 0x28, 0x6a, 0xc3, 0x43, 0x71, 0xba, 0x67, 0x8b, 0x07, 0xd4, 0xef, 0xc2, 0x10, 0x96, 0x1e, 0x4b, 0x6a, 0x94, 0x5d, 0x73, 0x44, 0x61, + /* (2^ 84)P */ 0x50, 0x33, 0x5b, 0xd7, 0x1e, 0x11, 0x6f, 0x53, 0x1b, 0xd8, 0x41, 0x20, 0x8c, 0xdb, 0x11, 0x02, 0x3c, 0x41, 0x10, 0x0e, 0x00, 0xb1, 0x3c, 0xf9, 0x76, 0x88, 0x9e, 0x03, 0x3c, 0xfd, 0x9d, 0x14, + /* (2^ 85)P */ 0x5b, 0x15, 0x63, 0x6b, 0xe4, 0xdd, 0x79, 0xd4, 0x76, 0x79, 0x83, 0x3c, 0xe9, 0x15, 0x6e, 0xb6, 0x38, 0xe0, 0x13, 0x1f, 0x3b, 0xe4, 0xfd, 0xda, 0x35, 0x0b, 0x4b, 0x2e, 0x1a, 0xda, 0xaf, 0x5f, + /* (2^ 86)P */ 0x81, 0x75, 0x19, 0x17, 0xdf, 0xbb, 0x00, 0x36, 0xc2, 0xd2, 0x3c, 0xbe, 0x0b, 0x05, 0x72, 0x39, 0x86, 0xbe, 0xd5, 0xbd, 0x6d, 0x90, 0x38, 0x59, 0x0f, 0x86, 0x9b, 0x3f, 0xe4, 0xe5, 0xfc, 0x34, + /* (2^ 87)P */ 0x02, 0x4d, 0xd1, 0x42, 0xcd, 0xa4, 0xa8, 0x75, 0x65, 0xdf, 0x41, 0x34, 0xc5, 0xab, 0x8d, 0x82, 0xd3, 0x31, 0xe1, 0xd2, 0xed, 0xab, 0xdc, 0x33, 0x5f, 0xd2, 0x14, 0xb8, 0x6f, 0xd7, 0xba, 0x3e, + /* (2^ 88)P */ 0x0f, 0xe1, 0x70, 0x6f, 0x56, 0x6f, 0x90, 0xd4, 0x5a, 0x0f, 0x69, 0x51, 0xaa, 0xf7, 0x12, 0x5d, 0xf2, 0xfc, 0xce, 0x76, 0x6e, 0xb1, 0xad, 0x45, 0x99, 0x29, 0x23, 0xad, 0xae, 0x68, 0xf7, 0x01, + /* (2^ 89)P */ 0xbd, 0xfe, 0x48, 0x62, 0x7b, 0xc7, 0x6c, 0x2b, 0xfd, 0xaf, 0x3a, 0xec, 0x28, 0x06, 0xd3, 0x3c, 0x6a, 0x48, 0xef, 0xd4, 0x80, 0x0b, 0x1c, 0xce, 0x23, 0x6c, 0xf6, 0xa6, 0x2e, 0xff, 0x3b, 0x4c, + /* (2^ 90)P */ 0x5f, 0xeb, 0xea, 0x4a, 0x09, 0xc4, 0x2e, 0x3f, 0xa7, 0x2c, 0x37, 0x6e, 0x28, 0x9b, 0xb1, 0x61, 0x1d, 0x70, 0x2a, 0xde, 0x66, 0xa9, 0xef, 0x5e, 0xef, 0xe3, 0x55, 0xde, 0x65, 0x05, 0xb2, 0x23, + /* (2^ 91)P */ 0x57, 0x85, 0xd5, 0x79, 0x52, 0xca, 0x01, 0xe3, 0x4f, 0x87, 0xc2, 0x27, 0xce, 0xd4, 0xb2, 0x07, 0x67, 0x1d, 0xcf, 0x9d, 0x8a, 0xcd, 0x32, 0xa5, 0x56, 0xff, 0x2b, 0x3f, 0xe2, 0xfe, 0x52, 0x2a, + /* (2^ 92)P */ 0x3d, 0x66, 0xd8, 0x7c, 0xb3, 0xef, 0x24, 0x86, 0x94, 0x75, 0xbd, 0xff, 0x20, 0xac, 0xc7, 0xbb, 0x45, 0x74, 0xd3, 0x82, 0x9c, 0x5e, 0xb8, 0x57, 0x66, 0xec, 0xa6, 0x86, 0xcb, 0x52, 0x30, 0x7b, + /* (2^ 93)P */ 0x1e, 0xe9, 0x25, 0x25, 0xad, 0xf0, 0x82, 0x34, 0xa0, 0xdc, 0x8e, 0xd2, 0x43, 0x80, 0xb6, 0x2c, 0x3a, 0x00, 0x1b, 0x2e, 0x05, 0x6d, 0x4f, 0xaf, 0x0a, 0x1b, 0x78, 0x29, 0x25, 0x8c, 0x5f, 0x18, + /* (2^ 94)P */ 0xd6, 0xe0, 0x0c, 0xd8, 0x5b, 0xde, 0x41, 0xaa, 0xd6, 0xe9, 0x53, 0x68, 0x41, 0xb2, 0x07, 0x94, 0x3a, 0x4c, 0x7f, 0x35, 0x6e, 0xc3, 0x3e, 0x56, 0xce, 0x7b, 0x29, 0x0e, 0xdd, 0xb8, 0xc4, 0x4c, + /* (2^ 95)P */ 0x0e, 0x73, 0xb8, 0xff, 0x52, 0x1a, 0xfc, 0xa2, 0x37, 0x8e, 0x05, 0x67, 0x6e, 0xf1, 0x11, 0x18, 0xe1, 0x4e, 0xdf, 0xcd, 0x66, 0xa3, 0xf9, 0x10, 0x99, 0xf0, 0xb9, 0xa0, 0xc4, 0xa0, 0xf4, 0x72, + /* (2^ 96)P */ 0xa7, 0x4e, 0x3f, 0x66, 0x6f, 0xc0, 0x16, 0x8c, 0xba, 0x0f, 0x97, 0x4e, 0xf7, 0x3a, 0x3b, 0x69, 0x45, 0xc3, 0x9e, 0xd6, 0xf1, 0xe7, 0x02, 0x21, 0x89, 0x80, 0x8a, 0x96, 0xbc, 0x3c, 0xa5, 0x0b, + /* (2^ 97)P */ 0x37, 0x55, 0xa1, 0xfe, 0xc7, 0x9d, 0x3d, 0xca, 0x93, 0x64, 0x53, 0x51, 0xbb, 0x24, 0x68, 0x4c, 0xb1, 0x06, 0x40, 0x84, 0x14, 0x63, 0x88, 0xb9, 0x60, 0xcc, 0x54, 0xb4, 0x2a, 0xa7, 0xd2, 0x40, + /* (2^ 98)P */ 0x75, 0x09, 0x57, 0x12, 0xb7, 0xa1, 0x36, 0x59, 0x57, 0xa6, 0xbd, 0xde, 0x48, 0xd6, 0xb9, 0x91, 0xea, 0x30, 0x43, 0xb6, 0x4b, 0x09, 0x44, 0x33, 0xd0, 0x51, 0xee, 0x12, 0x0d, 0xa1, 0x6b, 0x00, + /* (2^ 99)P */ 0x58, 0x5d, 0xde, 0xf5, 0x68, 0x84, 0x22, 0x19, 0xb0, 0x05, 0xcc, 0x38, 0x4c, 0x2f, 0xb1, 0x0e, 0x90, 0x19, 0x60, 0xd5, 0x9d, 0x9f, 0x03, 0xa1, 0x0b, 0x0e, 0xff, 0x4f, 0xce, 0xd4, 0x02, 0x45, + /* (2^100)P */ 0x89, 0xc1, 0x37, 0x68, 0x10, 0x54, 0x20, 0xeb, 0x3c, 0xb9, 0xd3, 0x6d, 0x4c, 0x54, 0xf6, 0xd0, 0x4f, 0xd7, 0x16, 0xc4, 0x64, 0x70, 0x72, 0x40, 0xf0, 0x2e, 0x50, 0x4b, 0x11, 0xc6, 0x15, 0x6e, + /* (2^101)P */ 0x6b, 0xa7, 0xb1, 0xcf, 0x98, 0xa3, 0xf2, 0x4d, 0xb1, 0xf6, 0xf2, 0x19, 0x74, 0x6c, 0x25, 0x11, 0x43, 0x60, 0x6e, 0x06, 0x62, 0x79, 0x49, 0x4a, 0x44, 0x5b, 0x35, 0x41, 0xab, 0x3a, 0x5b, 0x70, + /* (2^102)P */ 0xd8, 0xb1, 0x97, 0xd7, 0x36, 0xf5, 0x5e, 0x36, 0xdb, 0xf0, 0xdd, 0x22, 0xd6, 0x6b, 0x07, 0x00, 0x88, 0x5a, 0x57, 0xe0, 0xb0, 0x33, 0xbf, 0x3b, 0x4d, 0xca, 0xe4, 0xc8, 0x05, 0xaa, 0x77, 0x37, + /* (2^103)P */ 0x5f, 0xdb, 0x78, 0x55, 0xc8, 0x45, 0x27, 0x39, 0xe2, 0x5a, 0xae, 0xdb, 0x49, 0x41, 0xda, 0x6f, 0x67, 0x98, 0xdc, 0x8a, 0x0b, 0xb0, 0xf0, 0xb1, 0xa3, 0x1d, 0x6f, 0xd3, 0x37, 0x34, 0x96, 0x09, + /* (2^104)P */ 0x53, 0x38, 0xdc, 0xa5, 0x90, 0x4e, 0x82, 0x7e, 0xbd, 0x5c, 0x13, 0x1f, 0x64, 0xf6, 0xb5, 0xcc, 0xcc, 0x8f, 0xce, 0x87, 0x6c, 0xd8, 0x36, 0x67, 0x9f, 0x24, 0x04, 0x66, 0xe2, 0x3c, 0x5f, 0x62, + /* (2^105)P */ 0x3f, 0xf6, 0x02, 0x95, 0x05, 0xc8, 0x8a, 0xaf, 0x69, 0x14, 0x35, 0x2e, 0x0a, 0xe7, 0x05, 0x0c, 0x05, 0x63, 0x4b, 0x76, 0x9c, 0x2e, 0x29, 0x35, 0xc3, 0x3a, 0xe2, 0xc7, 0x60, 0x43, 0x39, 0x1a, + /* (2^106)P */ 0x64, 0x32, 0x18, 0x51, 0x32, 0xd5, 0xc6, 0xd5, 0x4f, 0xb7, 0xc2, 0x43, 0xbd, 0x5a, 0x06, 0x62, 0x9b, 0x3f, 0x97, 0x3b, 0xd0, 0xf5, 0xfb, 0xb5, 0x5e, 0x6e, 0x20, 0x61, 0x36, 0xda, 0xa3, 0x13, + /* (2^107)P */ 0xe5, 0x94, 0x5d, 0x72, 0x37, 0x58, 0xbd, 0xc6, 0xc5, 0x16, 0x50, 0x20, 0x12, 0x09, 0xe3, 0x18, 0x68, 0x3c, 0x03, 0x70, 0x15, 0xce, 0x88, 0x20, 0x87, 0x79, 0x83, 0x5c, 0x49, 0x1f, 0xba, 0x7f, + /* (2^108)P */ 0x9d, 0x07, 0xf9, 0xf2, 0x23, 0x74, 0x8c, 0x5a, 0xc5, 0x3f, 0x02, 0x34, 0x7b, 0x15, 0x35, 0x17, 0x51, 0xb3, 0xfa, 0xd2, 0x9a, 0xb4, 0xf9, 0xe4, 0x3c, 0xe3, 0x78, 0xc8, 0x72, 0xff, 0x91, 0x66, + /* (2^109)P */ 0x3e, 0xff, 0x5e, 0xdc, 0xde, 0x2a, 0x2c, 0x12, 0xf4, 0x6c, 0x95, 0xd8, 0xf1, 0x4b, 0xdd, 0xf8, 0xda, 0x5b, 0x9e, 0x9e, 0x5d, 0x20, 0x86, 0xeb, 0x43, 0xc7, 0x75, 0xd9, 0xb9, 0x92, 0x9b, 0x04, + /* (2^110)P */ 0x5a, 0xc0, 0xf6, 0xb0, 0x30, 0x97, 0x37, 0xa5, 0x53, 0xa5, 0xf3, 0xc6, 0xac, 0xff, 0xa0, 0x72, 0x6d, 0xcd, 0x0d, 0xb2, 0x34, 0x2c, 0x03, 0xb0, 0x4a, 0x16, 0xd5, 0x88, 0xbc, 0x9d, 0x0e, 0x47, + /* (2^111)P */ 0x47, 0xc0, 0x37, 0xa2, 0x0c, 0xf1, 0x9c, 0xb1, 0xa2, 0x81, 0x6c, 0x1f, 0x71, 0x66, 0x54, 0xb6, 0x43, 0x0b, 0xd8, 0x6d, 0xd1, 0x1b, 0x32, 0xb3, 0x8e, 0xbe, 0x5f, 0x0c, 0x60, 0x4f, 0xc1, 0x48, + /* (2^112)P */ 0x03, 0xc8, 0xa6, 0x4a, 0x26, 0x1c, 0x45, 0x66, 0xa6, 0x7d, 0xfa, 0xa4, 0x04, 0x39, 0x6e, 0xb6, 0x95, 0x83, 0x12, 0xb3, 0xb0, 0x19, 0x5f, 0xd4, 0x10, 0xbc, 0xc9, 0xc3, 0x27, 0x26, 0x60, 0x31, + /* (2^113)P */ 0x0d, 0xe1, 0xe4, 0x32, 0x48, 0xdc, 0x20, 0x31, 0xf7, 0x17, 0xc7, 0x56, 0x67, 0xc4, 0x20, 0xeb, 0x94, 0x02, 0x28, 0x67, 0x3f, 0x2e, 0xf5, 0x00, 0x09, 0xc5, 0x30, 0x47, 0xc1, 0x4f, 0x6d, 0x56, + /* (2^114)P */ 0x06, 0x72, 0x83, 0xfd, 0x40, 0x5d, 0x3a, 0x7e, 0x7a, 0x54, 0x59, 0x71, 0xdc, 0x26, 0xe9, 0xc1, 0x95, 0x60, 0x8d, 0xa6, 0xfb, 0x30, 0x67, 0x21, 0xa7, 0xce, 0x69, 0x3f, 0x84, 0xc3, 0xe8, 0x22, + /* (2^115)P */ 0x2b, 0x4b, 0x0e, 0x93, 0xe8, 0x74, 0xd0, 0x33, 0x16, 0x58, 0xd1, 0x84, 0x0e, 0x35, 0xe4, 0xb6, 0x65, 0x23, 0xba, 0xd6, 0x6a, 0xc2, 0x34, 0x55, 0xf3, 0xf3, 0xf1, 0x89, 0x2f, 0xc1, 0x73, 0x77, + /* (2^116)P */ 0xaa, 0x62, 0x79, 0xa5, 0x4d, 0x40, 0xba, 0x8c, 0x56, 0xce, 0x99, 0x19, 0xa8, 0x97, 0x98, 0x5b, 0xfc, 0x92, 0x16, 0x12, 0x2f, 0x86, 0x8e, 0x50, 0x91, 0xc2, 0x93, 0xa0, 0x7f, 0x90, 0x81, 0x3a, + /* (2^117)P */ 0x10, 0xa5, 0x25, 0x47, 0xff, 0xd0, 0xde, 0x0d, 0x03, 0xc5, 0x3f, 0x67, 0x10, 0xcc, 0xd8, 0x10, 0x89, 0x4e, 0x1f, 0x9f, 0x1c, 0x15, 0x9d, 0x5b, 0x4c, 0xa4, 0x09, 0xcb, 0xd5, 0xc1, 0xa5, 0x32, + /* (2^118)P */ 0xfb, 0x41, 0x05, 0xb9, 0x42, 0xa4, 0x0a, 0x1e, 0xdb, 0x85, 0xb4, 0xc1, 0x7c, 0xeb, 0x85, 0x5f, 0xe5, 0xf2, 0x9d, 0x8a, 0xce, 0x95, 0xe5, 0xbe, 0x36, 0x22, 0x42, 0x22, 0xc7, 0x96, 0xe4, 0x25, + /* (2^119)P */ 0xb9, 0xe5, 0x0f, 0xcd, 0x46, 0x3c, 0xdf, 0x5e, 0x88, 0x33, 0xa4, 0xd2, 0x7e, 0x5a, 0xe7, 0x34, 0x52, 0xe3, 0x61, 0xd7, 0x11, 0xde, 0x88, 0xe4, 0x5c, 0x54, 0x85, 0xa0, 0x01, 0x8a, 0x87, 0x0e, + /* (2^120)P */ 0x04, 0xbb, 0x21, 0xe0, 0x77, 0x3c, 0x49, 0xba, 0x9a, 0x89, 0xdf, 0xc7, 0x43, 0x18, 0x4d, 0x2b, 0x67, 0x0d, 0xe8, 0x7a, 0x48, 0x7a, 0xa3, 0x9e, 0x94, 0x17, 0xe4, 0x11, 0x80, 0x95, 0xa9, 0x67, + /* (2^121)P */ 0x65, 0xb0, 0x97, 0x66, 0x1a, 0x05, 0x58, 0x4b, 0xd4, 0xa6, 0x6b, 0x8d, 0x7d, 0x3f, 0xe3, 0x47, 0xc1, 0x46, 0xca, 0x83, 0xd4, 0xa8, 0x4d, 0xbb, 0x0d, 0xdb, 0xc2, 0x81, 0xa1, 0xca, 0xbe, 0x68, + /* (2^122)P */ 0xa5, 0x9a, 0x98, 0x0b, 0xe9, 0x80, 0x89, 0x8d, 0x9b, 0xc9, 0x93, 0x2c, 0x4a, 0xb1, 0x5e, 0xf9, 0xa2, 0x73, 0x6e, 0x79, 0xc4, 0xc7, 0xc6, 0x51, 0x69, 0xb5, 0xef, 0xb5, 0x63, 0x83, 0x22, 0x6e, + /* (2^123)P */ 0xc8, 0x24, 0xd6, 0x2d, 0xb0, 0xc0, 0xbb, 0xc6, 0xee, 0x70, 0x81, 0xec, 0x7d, 0xb4, 0x7e, 0x77, 0xa9, 0xaf, 0xcf, 0x04, 0xa0, 0x15, 0xde, 0x3c, 0x9b, 0xbf, 0x60, 0x71, 0x08, 0xbc, 0xc6, 0x1d, + /* (2^124)P */ 0x02, 0x40, 0xc3, 0xee, 0x43, 0xe0, 0x07, 0x2e, 0x7f, 0xdc, 0x68, 0x7a, 0x67, 0xfc, 0xe9, 0x18, 0x9a, 0x5b, 0xd1, 0x8b, 0x18, 0x03, 0xda, 0xd8, 0x53, 0x82, 0x56, 0x00, 0xbb, 0xc3, 0xfb, 0x48, + /* (2^125)P */ 0xe1, 0x4c, 0x65, 0xfb, 0x4c, 0x7d, 0x54, 0x57, 0xad, 0xe2, 0x58, 0xa0, 0x82, 0x5b, 0x56, 0xd3, 0x78, 0x44, 0x15, 0xbf, 0x0b, 0xaf, 0x3e, 0xf6, 0x18, 0xbb, 0xdf, 0x14, 0xf1, 0x1e, 0x53, 0x47, + /* (2^126)P */ 0x87, 0xc5, 0x78, 0x42, 0x0a, 0x63, 0xec, 0xe1, 0xf3, 0x83, 0x8e, 0xca, 0x46, 0xd5, 0x07, 0x55, 0x2b, 0x0c, 0xdc, 0x3a, 0xc6, 0x35, 0xe1, 0x85, 0x4e, 0x84, 0x82, 0x56, 0xa8, 0xef, 0xa7, 0x0a, + /* (2^127)P */ 0x15, 0xf6, 0xe1, 0xb3, 0xa8, 0x1b, 0x69, 0x72, 0xfa, 0x3f, 0xbe, 0x1f, 0x70, 0xe9, 0xb4, 0x32, 0x68, 0x78, 0xbb, 0x39, 0x2e, 0xd9, 0xb6, 0x97, 0xe8, 0x39, 0x2e, 0xa0, 0xde, 0x53, 0xfe, 0x2c, + /* (2^128)P */ 0xb0, 0x52, 0xcd, 0x85, 0xcd, 0x92, 0x73, 0x68, 0x31, 0x98, 0xe2, 0x10, 0xc9, 0x66, 0xff, 0x27, 0x06, 0x2d, 0x83, 0xa9, 0x56, 0x45, 0x13, 0x97, 0xa0, 0xf8, 0x84, 0x0a, 0x36, 0xb0, 0x9b, 0x26, + /* (2^129)P */ 0x5c, 0xf8, 0x43, 0x76, 0x45, 0x55, 0x6e, 0x70, 0x1b, 0x7d, 0x59, 0x9b, 0x8c, 0xa4, 0x34, 0x37, 0x72, 0xa4, 0xef, 0xc6, 0xe8, 0x91, 0xee, 0x7a, 0xe0, 0xd9, 0xa9, 0x98, 0xc1, 0xab, 0xd6, 0x5c, + /* (2^130)P */ 0x1a, 0xe4, 0x3c, 0xcb, 0x06, 0xde, 0x04, 0x0e, 0x38, 0xe1, 0x02, 0x34, 0x89, 0xeb, 0xc6, 0xd8, 0x72, 0x37, 0x6e, 0x68, 0xbb, 0x59, 0x46, 0x90, 0xc8, 0xa8, 0x6b, 0x74, 0x71, 0xc3, 0x15, 0x72, + /* (2^131)P */ 0xd9, 0xa2, 0xe4, 0xea, 0x7e, 0xa9, 0x12, 0xfd, 0xc5, 0xf2, 0x94, 0x63, 0x51, 0xb7, 0x14, 0x95, 0x94, 0xf2, 0x08, 0x92, 0x80, 0xd5, 0x6f, 0x26, 0xb9, 0x26, 0x9a, 0x61, 0x85, 0x70, 0x84, 0x5c, + /* (2^132)P */ 0xea, 0x94, 0xd6, 0xfe, 0x10, 0x54, 0x98, 0x52, 0x54, 0xd2, 0x2e, 0x4a, 0x93, 0x5b, 0x90, 0x3c, 0x67, 0xe4, 0x3b, 0x2d, 0x69, 0x47, 0xbb, 0x10, 0xe1, 0xe9, 0xe5, 0x69, 0x2d, 0x3d, 0x3b, 0x06, + /* (2^133)P */ 0xeb, 0x7d, 0xa5, 0xdd, 0xee, 0x26, 0x27, 0x47, 0x91, 0x18, 0xf4, 0x10, 0xae, 0xc4, 0xb6, 0xef, 0x14, 0x76, 0x30, 0x7b, 0x91, 0x41, 0x16, 0x2b, 0x7c, 0x5b, 0xf4, 0xc4, 0x4f, 0x55, 0x7c, 0x11, + /* (2^134)P */ 0x12, 0x88, 0x9d, 0x8f, 0x11, 0xf3, 0x7c, 0xc0, 0x39, 0x79, 0x01, 0x50, 0x20, 0xd8, 0xdb, 0x01, 0x27, 0x28, 0x1b, 0x17, 0xf4, 0x03, 0xe8, 0xd7, 0xea, 0x25, 0xd2, 0x87, 0x74, 0xe8, 0x15, 0x10, + /* (2^135)P */ 0x4d, 0xcc, 0x3a, 0xd2, 0xfe, 0xe3, 0x8d, 0xc5, 0x2d, 0xbe, 0xa7, 0x94, 0xc2, 0x91, 0xdb, 0x50, 0x57, 0xf4, 0x9c, 0x1c, 0x3d, 0xd4, 0x94, 0x0b, 0x4a, 0x52, 0x37, 0x6e, 0xfa, 0x40, 0x16, 0x6b, + /* (2^136)P */ 0x09, 0x0d, 0xda, 0x5f, 0x6c, 0x34, 0x2f, 0x69, 0x51, 0x31, 0x4d, 0xfa, 0x59, 0x1c, 0x0b, 0x20, 0x96, 0xa2, 0x77, 0x07, 0x76, 0x6f, 0xc4, 0xb8, 0xcf, 0xfb, 0xfd, 0x3f, 0x5f, 0x39, 0x38, 0x4b, + /* (2^137)P */ 0x71, 0xd6, 0x54, 0xbe, 0x00, 0x5e, 0xd2, 0x18, 0xa6, 0xab, 0xc8, 0xbe, 0x82, 0x05, 0xd5, 0x60, 0x82, 0xb9, 0x78, 0x3b, 0x26, 0x8f, 0xad, 0x87, 0x32, 0x04, 0xda, 0x9c, 0x4e, 0xf6, 0xfd, 0x50, + /* (2^138)P */ 0xf0, 0xdc, 0x78, 0xc5, 0xaa, 0x67, 0xf5, 0x90, 0x3b, 0x13, 0xa3, 0xf2, 0x0e, 0x9b, 0x1e, 0xef, 0x71, 0xde, 0xd9, 0x42, 0x92, 0xba, 0xeb, 0x0e, 0xc7, 0x01, 0x31, 0xf0, 0x9b, 0x3c, 0x47, 0x15, + /* (2^139)P */ 0x95, 0x80, 0xb7, 0x56, 0xae, 0xe8, 0x77, 0x7c, 0x8e, 0x07, 0x6f, 0x6e, 0x66, 0xe7, 0x78, 0xb6, 0x1f, 0xba, 0x48, 0x53, 0x61, 0xb9, 0xa0, 0x2d, 0x0b, 0x3f, 0x73, 0xff, 0xc1, 0x31, 0xf9, 0x7c, + /* (2^140)P */ 0x6c, 0x36, 0x0a, 0x0a, 0xf5, 0x57, 0xb3, 0x26, 0x32, 0xd7, 0x87, 0x2b, 0xf4, 0x8c, 0x70, 0xe9, 0xc0, 0xb2, 0x1c, 0xf9, 0xa5, 0xee, 0x3a, 0xc1, 0x4c, 0xbb, 0x43, 0x11, 0x99, 0x0c, 0xd9, 0x35, + /* (2^141)P */ 0xdc, 0xd9, 0xa0, 0xa9, 0x04, 0xc4, 0xc1, 0x47, 0x51, 0xd2, 0x72, 0x19, 0x45, 0x58, 0x9e, 0x65, 0x31, 0x8c, 0xb3, 0x73, 0xc4, 0xa8, 0x75, 0x38, 0x24, 0x1f, 0x56, 0x79, 0xd3, 0x9e, 0xbd, 0x1f, + /* (2^142)P */ 0x8d, 0xc2, 0x1e, 0xd4, 0x6f, 0xbc, 0xfa, 0x11, 0xca, 0x2d, 0x2a, 0xcd, 0xe3, 0xdf, 0xf8, 0x7e, 0x95, 0x45, 0x40, 0x8c, 0x5d, 0x3b, 0xe7, 0x72, 0x27, 0x2f, 0xb7, 0x54, 0x49, 0xfa, 0x35, 0x61, + /* (2^143)P */ 0x9c, 0xb6, 0x24, 0xde, 0xa2, 0x32, 0xfc, 0xcc, 0x88, 0x5d, 0x09, 0x1f, 0x8c, 0x69, 0x55, 0x3f, 0x29, 0xf9, 0xc3, 0x5a, 0xed, 0x50, 0x33, 0xbe, 0xeb, 0x7e, 0x47, 0xca, 0x06, 0xf8, 0x9b, 0x5e, + /* (2^144)P */ 0x68, 0x9f, 0x30, 0x3c, 0xb6, 0x8f, 0xce, 0xe9, 0xf4, 0xf9, 0xe1, 0x65, 0x35, 0xf6, 0x76, 0x53, 0xf1, 0x93, 0x63, 0x5a, 0xb3, 0xcf, 0xaf, 0xd1, 0x06, 0x35, 0x62, 0xe5, 0xed, 0xa1, 0x32, 0x66, + /* (2^145)P */ 0x4c, 0xed, 0x2d, 0x0c, 0x39, 0x6c, 0x7d, 0x0b, 0x1f, 0xcb, 0x04, 0xdf, 0x81, 0x32, 0xcb, 0x56, 0xc7, 0xc3, 0xec, 0x49, 0x12, 0x5a, 0x30, 0x66, 0x2a, 0xa7, 0x8c, 0xa3, 0x60, 0x8b, 0x58, 0x5d, + /* (2^146)P */ 0x2d, 0xf4, 0xe5, 0xe8, 0x78, 0xbf, 0xec, 0xa6, 0xec, 0x3e, 0x8a, 0x3c, 0x4b, 0xb4, 0xee, 0x86, 0x04, 0x16, 0xd2, 0xfb, 0x48, 0x9c, 0x21, 0xec, 0x31, 0x67, 0xc3, 0x17, 0xf5, 0x1a, 0xaf, 0x1a, + /* (2^147)P */ 0xe7, 0xbd, 0x69, 0x67, 0x83, 0xa2, 0x06, 0xc3, 0xdb, 0x2a, 0x1e, 0x2b, 0x62, 0x80, 0x82, 0x20, 0xa6, 0x94, 0xff, 0xfb, 0x1f, 0xf5, 0x27, 0x80, 0x6b, 0xf2, 0x24, 0x11, 0xce, 0xa1, 0xcf, 0x76, + /* (2^148)P */ 0xb6, 0xab, 0x22, 0x24, 0x56, 0x00, 0xeb, 0x18, 0xc3, 0x29, 0x8c, 0x8f, 0xd5, 0xc4, 0x77, 0xf3, 0x1a, 0x56, 0x31, 0xf5, 0x07, 0xc2, 0xbb, 0x4d, 0x27, 0x8a, 0x12, 0x82, 0xf0, 0xb7, 0x53, 0x02, + /* (2^149)P */ 0xe0, 0x17, 0x2c, 0xb6, 0x1c, 0x09, 0x1f, 0x3d, 0xa9, 0x28, 0x46, 0xd6, 0xab, 0xe1, 0x60, 0x48, 0x53, 0x42, 0x9d, 0x30, 0x36, 0x74, 0xd1, 0x52, 0x76, 0xe5, 0xfa, 0x3e, 0xe1, 0x97, 0x6f, 0x35, + /* (2^150)P */ 0x5b, 0x53, 0x50, 0xa1, 0x1a, 0xe1, 0x51, 0xd3, 0xcc, 0x78, 0xd8, 0x1d, 0xbb, 0x45, 0x6b, 0x3e, 0x98, 0x2c, 0xd9, 0xbe, 0x28, 0x61, 0x77, 0x0c, 0xb8, 0x85, 0x28, 0x03, 0x93, 0xae, 0x34, 0x1d, + /* (2^151)P */ 0xc3, 0xa4, 0x5b, 0xa8, 0x8c, 0x48, 0xa0, 0x4b, 0xce, 0xe6, 0x9c, 0x3c, 0xc3, 0x48, 0x53, 0x98, 0x70, 0xa7, 0xbd, 0x97, 0x6f, 0x4c, 0x12, 0x66, 0x4a, 0x12, 0x54, 0x06, 0x29, 0xa0, 0x81, 0x0f, + /* (2^152)P */ 0xfd, 0x86, 0x9b, 0x56, 0xa6, 0x9c, 0xd0, 0x9e, 0x2d, 0x9a, 0xaf, 0x18, 0xfd, 0x09, 0x10, 0x81, 0x0a, 0xc2, 0xd8, 0x93, 0x3f, 0xd0, 0x08, 0xff, 0x6b, 0xf2, 0xae, 0x9f, 0x19, 0x48, 0xa1, 0x52, + /* (2^153)P */ 0x73, 0x1b, 0x8d, 0x2d, 0xdc, 0xf9, 0x03, 0x3e, 0x70, 0x1a, 0x96, 0x73, 0x18, 0x80, 0x05, 0x42, 0x70, 0x59, 0xa3, 0x41, 0xf0, 0x87, 0xd9, 0xc0, 0x49, 0xd5, 0xc0, 0xa1, 0x15, 0x1f, 0xaa, 0x07, + /* (2^154)P */ 0x24, 0x72, 0xd2, 0x8c, 0xe0, 0x6c, 0xd4, 0xdf, 0x39, 0x42, 0x4e, 0x93, 0x4f, 0x02, 0x0a, 0x6d, 0x59, 0x7b, 0x89, 0x99, 0x63, 0x7a, 0x8a, 0x80, 0xa2, 0x95, 0x3d, 0xe1, 0xe9, 0x56, 0x45, 0x0a, + /* (2^155)P */ 0x45, 0x30, 0xc1, 0xe9, 0x1f, 0x99, 0x1a, 0xd2, 0xb8, 0x51, 0x77, 0xfe, 0x48, 0x85, 0x0e, 0x9b, 0x35, 0x00, 0xf3, 0x4b, 0xcb, 0x43, 0xa6, 0x5d, 0x21, 0xf7, 0x40, 0x39, 0xd6, 0x28, 0xdb, 0x77, + /* (2^156)P */ 0x11, 0x90, 0xdc, 0x4a, 0x61, 0xeb, 0x5e, 0xfc, 0xeb, 0x11, 0xc4, 0xe8, 0x9a, 0x41, 0x29, 0x52, 0x74, 0xcf, 0x1d, 0x7d, 0x78, 0xe7, 0xc3, 0x9e, 0xb5, 0x4c, 0x6e, 0x21, 0x3e, 0x05, 0x0d, 0x34, + /* (2^157)P */ 0xb4, 0xf2, 0x8d, 0xb4, 0x39, 0xaf, 0xc7, 0xca, 0x94, 0x0a, 0xa1, 0x71, 0x28, 0xec, 0xfa, 0xc0, 0xed, 0x75, 0xa5, 0x5c, 0x24, 0x69, 0x0a, 0x14, 0x4c, 0x3a, 0x27, 0x34, 0x71, 0xc3, 0xf1, 0x0c, + /* (2^158)P */ 0xa5, 0xb8, 0x24, 0xc2, 0x6a, 0x30, 0xee, 0xc8, 0xb0, 0x30, 0x49, 0xcb, 0x7c, 0xee, 0xea, 0x57, 0x4f, 0xe7, 0xcb, 0xaa, 0xbd, 0x06, 0xe8, 0xa1, 0x7d, 0x65, 0xeb, 0x2e, 0x74, 0x62, 0x9a, 0x7d, + /* (2^159)P */ 0x30, 0x48, 0x6c, 0x54, 0xef, 0xb6, 0xb6, 0x9e, 0x2e, 0x6e, 0xb3, 0xdd, 0x1f, 0xca, 0x5c, 0x88, 0x05, 0x71, 0x0d, 0xef, 0x83, 0xf3, 0xb9, 0xe6, 0x12, 0x04, 0x2e, 0x9d, 0xef, 0x4f, 0x65, 0x58, + /* (2^160)P */ 0x26, 0x8e, 0x0e, 0xbe, 0xff, 0xc4, 0x05, 0xa9, 0x6e, 0x81, 0x31, 0x9b, 0xdf, 0xe5, 0x2d, 0x94, 0xe1, 0x88, 0x2e, 0x80, 0x3f, 0x72, 0x7d, 0x49, 0x8d, 0x40, 0x2f, 0x60, 0xea, 0x4d, 0x68, 0x30, + /* (2^161)P */ 0x34, 0xcb, 0xe6, 0xa3, 0x78, 0xa2, 0xe5, 0x21, 0xc4, 0x1d, 0x15, 0x5b, 0x6f, 0x6e, 0xfb, 0xae, 0x15, 0xca, 0x77, 0x9d, 0x04, 0x8e, 0x0b, 0xb3, 0x81, 0x89, 0xb9, 0x53, 0xcf, 0xc9, 0xc3, 0x28, + /* (2^162)P */ 0x2a, 0xdd, 0x6c, 0x55, 0x21, 0xb7, 0x7f, 0x28, 0x74, 0x22, 0x02, 0x97, 0xa8, 0x7c, 0x31, 0x0d, 0x58, 0x32, 0x54, 0x3a, 0x42, 0xc7, 0x68, 0x74, 0x2f, 0x64, 0xb5, 0x4e, 0x46, 0x11, 0x7f, 0x4a, + /* (2^163)P */ 0xa6, 0x3a, 0x19, 0x4d, 0x77, 0xa4, 0x37, 0xa2, 0xa1, 0x29, 0x21, 0xa9, 0x6e, 0x98, 0x65, 0xd8, 0x88, 0x1a, 0x7c, 0xf8, 0xec, 0x15, 0xc5, 0x24, 0xeb, 0xf5, 0x39, 0x5f, 0x57, 0x03, 0x40, 0x60, + /* (2^164)P */ 0x27, 0x9b, 0x0a, 0x57, 0x89, 0xf1, 0xb9, 0x47, 0x78, 0x4b, 0x5e, 0x46, 0xde, 0xce, 0x98, 0x2b, 0x20, 0x5c, 0xb8, 0xdb, 0x51, 0xf5, 0x6d, 0x02, 0x01, 0x19, 0xe2, 0x47, 0x10, 0xd9, 0xfc, 0x74, + /* (2^165)P */ 0xa3, 0xbf, 0xc1, 0x23, 0x0a, 0xa9, 0xe2, 0x13, 0xf6, 0x19, 0x85, 0x47, 0x4e, 0x07, 0xb0, 0x0c, 0x44, 0xcf, 0xf6, 0x3a, 0xbe, 0xcb, 0xf1, 0x5f, 0xbe, 0x2d, 0x81, 0xbe, 0x38, 0x54, 0xfe, 0x67, + /* (2^166)P */ 0xb0, 0x05, 0x0f, 0xa4, 0x4f, 0xf6, 0x3c, 0xd1, 0x87, 0x37, 0x28, 0x32, 0x2f, 0xfb, 0x4d, 0x05, 0xea, 0x2a, 0x0d, 0x7f, 0x5b, 0x91, 0x73, 0x41, 0x4e, 0x0d, 0x61, 0x1f, 0x4f, 0x14, 0x2f, 0x48, + /* (2^167)P */ 0x34, 0x82, 0x7f, 0xb4, 0x01, 0x02, 0x21, 0xf6, 0x90, 0xb9, 0x70, 0x9e, 0x92, 0xe1, 0x0a, 0x5d, 0x7c, 0x56, 0x49, 0xb0, 0x55, 0xf4, 0xd7, 0xdc, 0x01, 0x6f, 0x91, 0xf0, 0xf1, 0xd0, 0x93, 0x7e, + /* (2^168)P */ 0xfa, 0xb4, 0x7d, 0x8a, 0xf1, 0xcb, 0x79, 0xdd, 0x2f, 0xc6, 0x74, 0x6f, 0xbf, 0x91, 0x83, 0xbe, 0xbd, 0x91, 0x82, 0x4b, 0xd1, 0x45, 0x71, 0x02, 0x05, 0x17, 0xbf, 0x2c, 0xea, 0x73, 0x5a, 0x58, + /* (2^169)P */ 0xb2, 0x0d, 0x8a, 0x92, 0x3e, 0xa0, 0x5c, 0x48, 0xe7, 0x57, 0x28, 0x74, 0xa5, 0x01, 0xfc, 0x10, 0xa7, 0x51, 0xd5, 0xd6, 0xdb, 0x2e, 0x48, 0x2f, 0x8a, 0xdb, 0x8f, 0x04, 0xb5, 0x33, 0x04, 0x0f, + /* (2^170)P */ 0x47, 0x62, 0xdc, 0xd7, 0x8d, 0x2e, 0xda, 0x60, 0x9a, 0x81, 0xd4, 0x8c, 0xd3, 0xc9, 0xb4, 0x88, 0x97, 0x66, 0xf6, 0x01, 0xc0, 0x3a, 0x03, 0x13, 0x75, 0x7d, 0x36, 0x3b, 0xfe, 0x24, 0x3b, 0x27, + /* (2^171)P */ 0xd4, 0xb9, 0xb3, 0x31, 0x6a, 0xf6, 0xe8, 0xc6, 0xd5, 0x49, 0xdf, 0x94, 0xa4, 0x14, 0x15, 0x28, 0xa7, 0x3d, 0xb2, 0xc8, 0xdf, 0x6f, 0x72, 0xd1, 0x48, 0xe5, 0xde, 0x03, 0xd1, 0xe7, 0x3a, 0x4b, + /* (2^172)P */ 0x7e, 0x9d, 0x4b, 0xce, 0x19, 0x6e, 0x25, 0xc6, 0x1c, 0xc6, 0xe3, 0x86, 0xf1, 0x5c, 0x5c, 0xff, 0x45, 0xc1, 0x8e, 0x4b, 0xa3, 0x3c, 0xc6, 0xac, 0x74, 0x65, 0xe6, 0xfe, 0x88, 0x18, 0x62, 0x74, + /* (2^173)P */ 0x1e, 0x0a, 0x29, 0x45, 0x96, 0x40, 0x6f, 0x95, 0x2e, 0x96, 0x3a, 0x26, 0xe3, 0xf8, 0x0b, 0xef, 0x7b, 0x64, 0xc2, 0x5e, 0xeb, 0x50, 0x6a, 0xed, 0x02, 0x75, 0xca, 0x9d, 0x3a, 0x28, 0x94, 0x06, + /* (2^174)P */ 0xd1, 0xdc, 0xa2, 0x43, 0x36, 0x96, 0x9b, 0x76, 0x53, 0x53, 0xfc, 0x09, 0xea, 0xc8, 0xb7, 0x42, 0xab, 0x7e, 0x39, 0x13, 0xee, 0x2a, 0x00, 0x4f, 0x3a, 0xd6, 0xb7, 0x19, 0x2c, 0x5e, 0x00, 0x63, + /* (2^175)P */ 0xea, 0x3b, 0x02, 0x63, 0xda, 0x36, 0x67, 0xca, 0xb7, 0x99, 0x2a, 0xb1, 0x6d, 0x7f, 0x6c, 0x96, 0xe1, 0xc5, 0x37, 0xc5, 0x90, 0x93, 0xe0, 0xac, 0xee, 0x89, 0xaa, 0xa1, 0x63, 0x60, 0x69, 0x0b, + /* (2^176)P */ 0xe5, 0x56, 0x8c, 0x28, 0x97, 0x3e, 0xb0, 0xeb, 0xe8, 0x8b, 0x8c, 0x93, 0x9f, 0x9f, 0x2a, 0x43, 0x71, 0x7f, 0x71, 0x5b, 0x3d, 0xa9, 0xa5, 0xa6, 0x97, 0x9d, 0x8f, 0xe1, 0xc3, 0xb4, 0x5f, 0x1a, + /* (2^177)P */ 0xce, 0xcd, 0x60, 0x1c, 0xad, 0xe7, 0x94, 0x1c, 0xa0, 0xc4, 0x02, 0xfc, 0x43, 0x2a, 0x20, 0xee, 0x20, 0x6a, 0xc4, 0x67, 0xd8, 0xe4, 0xaf, 0x8d, 0x58, 0x7b, 0xc2, 0x8a, 0x3c, 0x26, 0x10, 0x0a, + /* (2^178)P */ 0x4a, 0x2a, 0x43, 0xe4, 0xdf, 0xa9, 0xde, 0xd0, 0xc5, 0x77, 0x92, 0xbe, 0x7b, 0xf8, 0x6a, 0x85, 0x1a, 0xc7, 0x12, 0xc2, 0xac, 0x72, 0x84, 0xce, 0x91, 0x1e, 0xbb, 0x9b, 0x6d, 0x1b, 0x15, 0x6f, + /* (2^179)P */ 0x6a, 0xd5, 0xee, 0x7c, 0x52, 0x6c, 0x77, 0x26, 0xec, 0xfa, 0xf8, 0xfb, 0xb7, 0x1c, 0x21, 0x7d, 0xcc, 0x09, 0x46, 0xfd, 0xa6, 0x66, 0xae, 0x37, 0x42, 0x0c, 0x77, 0xd2, 0x02, 0xb7, 0x81, 0x1f, + /* (2^180)P */ 0x92, 0x83, 0xc5, 0xea, 0x57, 0xb0, 0xb0, 0x2f, 0x9d, 0x4e, 0x74, 0x29, 0xfe, 0x89, 0xdd, 0xe1, 0xf8, 0xb4, 0xbe, 0x17, 0xeb, 0xf8, 0x64, 0xc9, 0x1e, 0xd4, 0xa2, 0xc9, 0x73, 0x10, 0x57, 0x29, + /* (2^181)P */ 0x54, 0xe2, 0xc0, 0x81, 0x89, 0xa1, 0x48, 0xa9, 0x30, 0x28, 0xb2, 0x65, 0x9b, 0x36, 0xf6, 0x2d, 0xc6, 0xd3, 0xcf, 0x5f, 0xd7, 0xb2, 0x3e, 0xa3, 0x1f, 0xa0, 0x99, 0x41, 0xec, 0xd6, 0x8c, 0x07, + /* (2^182)P */ 0x2f, 0x0d, 0x90, 0xad, 0x41, 0x4a, 0x58, 0x4a, 0x52, 0x4c, 0xc7, 0xe2, 0x78, 0x2b, 0x14, 0x32, 0x78, 0xc9, 0x31, 0x84, 0x33, 0xe8, 0xc4, 0x68, 0xc2, 0x9f, 0x68, 0x08, 0x90, 0xea, 0x69, 0x7f, + /* (2^183)P */ 0x65, 0x82, 0xa3, 0x46, 0x1e, 0xc8, 0xf2, 0x52, 0xfd, 0x32, 0xa8, 0x04, 0x2d, 0x07, 0x78, 0xfd, 0x94, 0x9e, 0x35, 0x25, 0xfa, 0xd5, 0xd7, 0x8c, 0xd2, 0x29, 0xcc, 0x54, 0x74, 0x1b, 0xe7, 0x4d, + /* (2^184)P */ 0xc9, 0x6a, 0xda, 0x1e, 0xad, 0x60, 0xeb, 0x42, 0x3a, 0x9c, 0xc0, 0xdb, 0xdf, 0x37, 0xad, 0x0a, 0x91, 0xc1, 0x3c, 0xe3, 0x71, 0x4b, 0x00, 0x81, 0x3c, 0x80, 0x22, 0x51, 0x34, 0xbe, 0xe6, 0x44, + /* (2^185)P */ 0xdb, 0x20, 0x19, 0xba, 0x88, 0x83, 0xfe, 0x03, 0x08, 0xb0, 0x0d, 0x15, 0x32, 0x7c, 0xd5, 0xf5, 0x29, 0x0c, 0xf6, 0x1a, 0x28, 0xc4, 0xc8, 0x49, 0xee, 0x1a, 0x70, 0xde, 0x18, 0xb5, 0xed, 0x21, + /* (2^186)P */ 0x99, 0xdc, 0x06, 0x8f, 0x41, 0x3e, 0xb6, 0x7f, 0xb8, 0xd7, 0x66, 0xc1, 0x99, 0x0d, 0x46, 0xa4, 0x83, 0x0a, 0x52, 0xce, 0x48, 0x52, 0xdd, 0x24, 0x58, 0x83, 0x92, 0x2b, 0x71, 0xad, 0xc3, 0x5e, + /* (2^187)P */ 0x0f, 0x93, 0x17, 0xbd, 0x5f, 0x2a, 0x02, 0x15, 0xe3, 0x70, 0x25, 0xd8, 0x77, 0x4a, 0xf6, 0xa4, 0x12, 0x37, 0x78, 0x15, 0x69, 0x8d, 0xbc, 0x12, 0xbb, 0x0a, 0x62, 0xfc, 0xc0, 0x94, 0x81, 0x49, + /* (2^188)P */ 0x82, 0x6c, 0x68, 0x55, 0xd2, 0xd9, 0xa2, 0x38, 0xf0, 0x21, 0x3e, 0x19, 0xd9, 0x6b, 0x5c, 0x78, 0x84, 0x54, 0x4a, 0xb2, 0x1a, 0xc8, 0xd5, 0xe4, 0x89, 0x09, 0xe2, 0xb2, 0x60, 0x78, 0x30, 0x56, + /* (2^189)P */ 0xc4, 0x74, 0x4d, 0x8b, 0xf7, 0x55, 0x9d, 0x42, 0x31, 0x01, 0x35, 0x43, 0x46, 0x83, 0xf1, 0x22, 0xff, 0x1f, 0xc7, 0x98, 0x45, 0xc2, 0x60, 0x1e, 0xef, 0x83, 0x99, 0x97, 0x14, 0xf0, 0xf2, 0x59, + /* (2^190)P */ 0x44, 0x4a, 0x49, 0xeb, 0x56, 0x7d, 0xa4, 0x46, 0x8e, 0xa1, 0x36, 0xd6, 0x54, 0xa8, 0x22, 0x3e, 0x3b, 0x1c, 0x49, 0x74, 0x52, 0xe1, 0x46, 0xb3, 0xe7, 0xcd, 0x90, 0x53, 0x4e, 0xfd, 0xea, 0x2c, + /* (2^191)P */ 0x75, 0x66, 0x0d, 0xbe, 0x38, 0x85, 0x8a, 0xba, 0x23, 0x8e, 0x81, 0x50, 0xbb, 0x74, 0x90, 0x4b, 0xc3, 0x04, 0xd3, 0x85, 0x90, 0xb8, 0xda, 0xcb, 0xc4, 0x92, 0x61, 0xe5, 0xe0, 0x4f, 0xa2, 0x61, + /* (2^192)P */ 0xcb, 0x5b, 0x52, 0xdb, 0xe6, 0x15, 0x76, 0xcb, 0xca, 0xe4, 0x67, 0xa5, 0x35, 0x8c, 0x7d, 0xdd, 0x69, 0xdd, 0xfc, 0xca, 0x3a, 0x15, 0xb4, 0xe6, 0x66, 0x97, 0x3c, 0x7f, 0x09, 0x8e, 0x66, 0x2d, + /* (2^193)P */ 0xf0, 0x5e, 0xe5, 0x5c, 0x26, 0x7e, 0x7e, 0xa5, 0x67, 0xb9, 0xd4, 0x7c, 0x52, 0x4e, 0x9f, 0x5d, 0xe5, 0xd1, 0x2f, 0x49, 0x06, 0x36, 0xc8, 0xfb, 0xae, 0xf7, 0xc3, 0xb7, 0xbe, 0x52, 0x0d, 0x09, + /* (2^194)P */ 0x7c, 0x4d, 0x7b, 0x1e, 0x5a, 0x51, 0xb9, 0x09, 0xc0, 0x44, 0xda, 0x99, 0x25, 0x6a, 0x26, 0x1f, 0x04, 0x55, 0xc5, 0xe2, 0x48, 0x95, 0xc4, 0xa1, 0xcc, 0x15, 0x6f, 0x12, 0x87, 0x42, 0xf0, 0x7e, + /* (2^195)P */ 0x15, 0xef, 0x30, 0xbd, 0x9d, 0x65, 0xd1, 0xfe, 0x7b, 0x27, 0xe0, 0xc4, 0xee, 0xb9, 0x4a, 0x8b, 0x91, 0x32, 0xdf, 0xa5, 0x36, 0x62, 0x4d, 0x88, 0x88, 0xf7, 0x5c, 0xbf, 0xa6, 0x6e, 0xd9, 0x1f, + /* (2^196)P */ 0x9a, 0x0d, 0x19, 0x1f, 0x98, 0x61, 0xa1, 0x42, 0xc1, 0x52, 0x60, 0x7e, 0x50, 0x49, 0xd8, 0x61, 0xd5, 0x2c, 0x5a, 0x28, 0xbf, 0x13, 0xe1, 0x9f, 0xd8, 0x85, 0xad, 0xdb, 0x76, 0xd6, 0x22, 0x7c, + /* (2^197)P */ 0x7d, 0xd2, 0xfb, 0x2b, 0xed, 0x70, 0xe7, 0x82, 0xa5, 0xf5, 0x96, 0xe9, 0xec, 0xb2, 0x05, 0x4c, 0x50, 0x01, 0x90, 0xb0, 0xc2, 0xa9, 0x40, 0xcd, 0x64, 0xbf, 0xd9, 0x13, 0x92, 0x31, 0x95, 0x58, + /* (2^198)P */ 0x08, 0x2e, 0xea, 0x3f, 0x70, 0x5d, 0xcc, 0xe7, 0x8c, 0x18, 0xe2, 0x58, 0x12, 0x49, 0x0c, 0xb5, 0xf0, 0x5b, 0x20, 0x48, 0xaa, 0x0b, 0xe3, 0xcc, 0x62, 0x2d, 0xa3, 0xcf, 0x9c, 0x65, 0x7c, 0x53, + /* (2^199)P */ 0x88, 0xc0, 0xcf, 0x98, 0x3a, 0x62, 0xb6, 0x37, 0xa4, 0xac, 0xd6, 0xa4, 0x1f, 0xed, 0x9b, 0xfe, 0xb0, 0xd1, 0xa8, 0x56, 0x8e, 0x9b, 0xd2, 0x04, 0x75, 0x95, 0x51, 0x0b, 0xc4, 0x71, 0x5f, 0x72, + /* (2^200)P */ 0xe6, 0x9c, 0x33, 0xd0, 0x9c, 0xf8, 0xc7, 0x28, 0x8b, 0xc1, 0xdd, 0x69, 0x44, 0xb1, 0x67, 0x83, 0x2c, 0x65, 0xa1, 0xa6, 0x83, 0xda, 0x3a, 0x88, 0x17, 0x6c, 0x4d, 0x03, 0x74, 0x19, 0x5f, 0x58, + /* (2^201)P */ 0x88, 0x91, 0xb1, 0xf1, 0x66, 0xb2, 0xcf, 0x89, 0x17, 0x52, 0xc3, 0xe7, 0x63, 0x48, 0x3b, 0xe6, 0x6a, 0x52, 0xc0, 0xb4, 0xa6, 0x9d, 0x8c, 0xd8, 0x35, 0x46, 0x95, 0xf0, 0x9d, 0x5c, 0x03, 0x3e, + /* (2^202)P */ 0x9d, 0xde, 0x45, 0xfb, 0x12, 0x54, 0x9d, 0xdd, 0x0d, 0xf4, 0xcf, 0xe4, 0x32, 0x45, 0x68, 0xdd, 0x1c, 0x67, 0x1d, 0x15, 0x9b, 0x99, 0x5c, 0x4b, 0x90, 0xf6, 0xe7, 0x11, 0xc8, 0x2c, 0x8c, 0x2d, + /* (2^203)P */ 0x40, 0x5d, 0x05, 0x90, 0x1d, 0xbe, 0x54, 0x7f, 0x40, 0xaf, 0x4a, 0x46, 0xdf, 0xc5, 0x64, 0xa4, 0xbe, 0x17, 0xe9, 0xf0, 0x24, 0x96, 0x97, 0x33, 0x30, 0x6b, 0x35, 0x27, 0xc5, 0x8d, 0x01, 0x2c, + /* (2^204)P */ 0xd4, 0xb3, 0x30, 0xe3, 0x24, 0x50, 0x41, 0xa5, 0xd3, 0x52, 0x16, 0x69, 0x96, 0x3d, 0xff, 0x73, 0xf1, 0x59, 0x9b, 0xef, 0xc4, 0x42, 0xec, 0x94, 0x5a, 0x8e, 0xd0, 0x18, 0x16, 0x20, 0x47, 0x07, + /* (2^205)P */ 0x53, 0x1c, 0x41, 0xca, 0x8a, 0xa4, 0x6c, 0x4d, 0x19, 0x61, 0xa6, 0xcf, 0x2f, 0x5f, 0x41, 0x66, 0xff, 0x27, 0xe2, 0x51, 0x00, 0xd4, 0x4d, 0x9c, 0xeb, 0xf7, 0x02, 0x9a, 0xc0, 0x0b, 0x81, 0x59, + /* (2^206)P */ 0x1d, 0x10, 0xdc, 0xb3, 0x71, 0xb1, 0x7e, 0x2a, 0x8e, 0xf6, 0xfe, 0x9f, 0xb9, 0x5a, 0x1c, 0x44, 0xea, 0x59, 0xb3, 0x93, 0x9b, 0x5c, 0x02, 0x32, 0x2f, 0x11, 0x9d, 0x1e, 0xa7, 0xe0, 0x8c, 0x5e, + /* (2^207)P */ 0xfd, 0x03, 0x95, 0x42, 0x92, 0xcb, 0xcc, 0xbf, 0x55, 0x5d, 0x09, 0x2f, 0x75, 0xba, 0x71, 0xd2, 0x1e, 0x09, 0x2d, 0x97, 0x5e, 0xad, 0x5e, 0x34, 0xba, 0x03, 0x31, 0xa8, 0x11, 0xdf, 0xc8, 0x18, + /* (2^208)P */ 0x4c, 0x0f, 0xed, 0x9a, 0x9a, 0x94, 0xcd, 0x90, 0x7e, 0xe3, 0x60, 0x66, 0xcb, 0xf4, 0xd1, 0xc5, 0x0b, 0x2e, 0xc5, 0x56, 0x2d, 0xc5, 0xca, 0xb8, 0x0d, 0x8e, 0x80, 0xc5, 0x00, 0xe4, 0x42, 0x6e, + /* (2^209)P */ 0x23, 0xfd, 0xae, 0xee, 0x66, 0x69, 0xb4, 0xa3, 0xca, 0xcd, 0x9e, 0xe3, 0x0b, 0x1f, 0x4f, 0x0c, 0x1d, 0xa5, 0x83, 0xd6, 0xc9, 0xc8, 0x9d, 0x18, 0x1b, 0x35, 0x09, 0x4c, 0x05, 0x7f, 0xf2, 0x51, + /* (2^210)P */ 0x82, 0x06, 0x32, 0x2a, 0xcd, 0x7c, 0x48, 0x4c, 0x96, 0x1c, 0xdf, 0xb3, 0x5b, 0xa9, 0x7e, 0x58, 0xe8, 0xb8, 0x5c, 0x55, 0x9e, 0xf7, 0xcc, 0xc8, 0x3d, 0xd7, 0x06, 0xa2, 0x29, 0xc8, 0x7d, 0x54, + /* (2^211)P */ 0x06, 0x9b, 0xc3, 0x80, 0xcd, 0xa6, 0x22, 0xb8, 0xc6, 0xd4, 0x00, 0x20, 0x73, 0x54, 0x6d, 0xe9, 0x4d, 0x3b, 0x46, 0x91, 0x6f, 0x5b, 0x53, 0x28, 0x1d, 0x6e, 0x48, 0xe2, 0x60, 0x46, 0x8f, 0x22, + /* (2^212)P */ 0xbf, 0x3a, 0x8d, 0xde, 0x38, 0x95, 0x79, 0x98, 0x6e, 0xca, 0xeb, 0x45, 0x00, 0x33, 0xd8, 0x8c, 0x38, 0xe7, 0x21, 0x82, 0x00, 0x2a, 0x95, 0x79, 0xbb, 0xd2, 0x5c, 0x53, 0xa7, 0xe1, 0x22, 0x43, + /* (2^213)P */ 0x1c, 0x80, 0xd1, 0x19, 0x18, 0xc1, 0x14, 0xb1, 0xc7, 0x5e, 0x3f, 0x4f, 0xd8, 0xe4, 0x16, 0x20, 0x4c, 0x0f, 0x26, 0x09, 0xf4, 0x2d, 0x0e, 0xdd, 0x66, 0x72, 0x5f, 0xae, 0xc0, 0x62, 0xc3, 0x5e, + /* (2^214)P */ 0xee, 0xb4, 0xb2, 0xb8, 0x18, 0x2b, 0x46, 0xc0, 0xfb, 0x1a, 0x4d, 0x27, 0x50, 0xd9, 0xc8, 0x7c, 0xd2, 0x02, 0x6b, 0x43, 0x05, 0x71, 0x5f, 0xf2, 0xd3, 0xcc, 0xf9, 0xbf, 0xdc, 0xf8, 0xbb, 0x43, + /* (2^215)P */ 0xdf, 0xe9, 0x39, 0xa0, 0x67, 0x17, 0xad, 0xb6, 0x83, 0x35, 0x9d, 0xf6, 0xa8, 0x4d, 0x71, 0xb0, 0xf5, 0x31, 0x29, 0xb4, 0x18, 0xfa, 0x55, 0x5e, 0x61, 0x09, 0xc6, 0x33, 0x8f, 0x55, 0xd5, 0x4e, + /* (2^216)P */ 0xdd, 0xa5, 0x47, 0xc6, 0x01, 0x79, 0xe3, 0x1f, 0x57, 0xd3, 0x81, 0x80, 0x1f, 0xdf, 0x3d, 0x59, 0xa6, 0xd7, 0x3f, 0x81, 0xfd, 0xa4, 0x49, 0x02, 0x61, 0xaf, 0x9c, 0x4e, 0x27, 0xca, 0xac, 0x69, + /* (2^217)P */ 0xc9, 0x21, 0x07, 0x33, 0xea, 0xa3, 0x7b, 0x04, 0xa0, 0x1e, 0x7e, 0x0e, 0xc2, 0x3f, 0x42, 0x83, 0x60, 0x4a, 0x31, 0x01, 0xaf, 0xc0, 0xf4, 0x1d, 0x27, 0x95, 0x28, 0x89, 0xab, 0x2d, 0xa6, 0x09, + /* (2^218)P */ 0x00, 0xcb, 0xc6, 0x9c, 0xa4, 0x25, 0xb3, 0xa5, 0xb6, 0x6c, 0xb5, 0x54, 0xc6, 0x5d, 0x4b, 0xe9, 0xa0, 0x94, 0xc9, 0xad, 0x79, 0x87, 0xe2, 0x3b, 0xad, 0x4a, 0x3a, 0xba, 0xf8, 0xe8, 0x96, 0x42, + /* (2^219)P */ 0xab, 0x1e, 0x45, 0x1e, 0x76, 0x89, 0x86, 0x32, 0x4a, 0x59, 0x59, 0xff, 0x8b, 0x59, 0x4d, 0x2e, 0x4a, 0x08, 0xa7, 0xd7, 0x53, 0x68, 0xb9, 0x49, 0xa8, 0x20, 0x14, 0x60, 0x19, 0xa3, 0x80, 0x49, + /* (2^220)P */ 0x42, 0x2c, 0x55, 0x2f, 0xe1, 0xb9, 0x65, 0x95, 0x96, 0xfe, 0x00, 0x71, 0xdb, 0x18, 0x53, 0x8a, 0xd7, 0xd0, 0xad, 0x43, 0x4d, 0x0b, 0xc9, 0x05, 0xda, 0x4e, 0x5d, 0x6a, 0xd6, 0x4c, 0x8b, 0x53, + /* (2^221)P */ 0x9f, 0x03, 0x9f, 0xe8, 0xc3, 0x4f, 0xe9, 0xf4, 0x45, 0x80, 0x61, 0x6f, 0xf2, 0x9a, 0x2c, 0x59, 0x50, 0x95, 0x4b, 0xfd, 0xb5, 0x6e, 0xa3, 0x08, 0x19, 0x14, 0xed, 0xc2, 0xf6, 0xfa, 0xff, 0x25, + /* (2^222)P */ 0x54, 0xd3, 0x79, 0xcc, 0x59, 0x44, 0x43, 0x34, 0x6b, 0x47, 0xd5, 0xb1, 0xb4, 0xbf, 0xec, 0xee, 0x99, 0x5d, 0x61, 0x61, 0xa0, 0x34, 0xeb, 0xdd, 0x73, 0xb7, 0x64, 0xeb, 0xcc, 0xce, 0x29, 0x51, + /* (2^223)P */ 0x20, 0x35, 0x99, 0x94, 0x58, 0x21, 0x43, 0xee, 0x3b, 0x0b, 0x4c, 0xf1, 0x7c, 0x9c, 0x2f, 0x77, 0xd5, 0xda, 0xbe, 0x06, 0xe3, 0xfc, 0xe2, 0xd2, 0x97, 0x6a, 0xf0, 0x46, 0xb5, 0x42, 0x5f, 0x71, + /* (2^224)P */ 0x1a, 0x5f, 0x5b, 0xda, 0xce, 0xcd, 0x4e, 0x43, 0xa9, 0x41, 0x97, 0xa4, 0x15, 0x71, 0xa1, 0x0d, 0x2e, 0xad, 0xed, 0x73, 0x7c, 0xd7, 0x0b, 0x68, 0x41, 0x90, 0xdd, 0x4e, 0x35, 0x02, 0x7c, 0x48, + /* (2^225)P */ 0xc4, 0xd9, 0x0e, 0xa7, 0xf3, 0xef, 0xef, 0xb8, 0x02, 0xe3, 0x57, 0xe8, 0xa3, 0x2a, 0xa3, 0x56, 0xa0, 0xa5, 0xa2, 0x48, 0xbd, 0x68, 0x3a, 0xdf, 0x44, 0xc4, 0x76, 0x31, 0xb7, 0x50, 0xf6, 0x07, + /* (2^226)P */ 0xb1, 0xcc, 0xe0, 0x26, 0x16, 0x9b, 0x8b, 0xe3, 0x36, 0xfb, 0x09, 0x8b, 0xc1, 0x53, 0xe0, 0x79, 0x64, 0x49, 0xf9, 0xc9, 0x19, 0x03, 0xd9, 0x56, 0xc4, 0xf5, 0x9f, 0xac, 0xe7, 0x41, 0xa9, 0x1c, + /* (2^227)P */ 0xbb, 0xa0, 0x2f, 0x16, 0x29, 0xdf, 0xc4, 0x49, 0x05, 0x33, 0xb3, 0x82, 0x32, 0xcf, 0x88, 0x84, 0x7d, 0x43, 0xbb, 0xca, 0x14, 0xda, 0xdf, 0x95, 0x86, 0xad, 0xd5, 0x64, 0x82, 0xf7, 0x91, 0x33, + /* (2^228)P */ 0x5d, 0x09, 0xb5, 0xe2, 0x6a, 0xe0, 0x9a, 0x72, 0x46, 0xa9, 0x59, 0x32, 0xd7, 0x58, 0x8a, 0xd5, 0xed, 0x21, 0x39, 0xd1, 0x62, 0x42, 0x83, 0xe9, 0x92, 0xb5, 0x4b, 0xa5, 0xfa, 0xda, 0xfe, 0x27, + /* (2^229)P */ 0xbb, 0x48, 0xad, 0x29, 0xb8, 0xc5, 0x9d, 0xa9, 0x60, 0xe2, 0x9e, 0x49, 0x42, 0x57, 0x02, 0x5f, 0xfd, 0x13, 0x75, 0x5d, 0xcd, 0x8e, 0x2c, 0x80, 0x38, 0xd9, 0x6d, 0x3f, 0xef, 0xb3, 0xce, 0x78, + /* (2^230)P */ 0x94, 0x5d, 0x13, 0x8a, 0x4f, 0xf4, 0x42, 0xc3, 0xa3, 0xdd, 0x8c, 0x82, 0x44, 0xdb, 0x9e, 0x7b, 0xe7, 0xcf, 0x37, 0x05, 0x1a, 0xd1, 0x36, 0x94, 0xc8, 0xb4, 0x1a, 0xec, 0x64, 0xb1, 0x64, 0x50, + /* (2^231)P */ 0xfc, 0xb2, 0x7e, 0xd3, 0xcf, 0xec, 0x20, 0x70, 0xfc, 0x25, 0x0d, 0xd9, 0x3e, 0xea, 0x31, 0x1f, 0x34, 0xbb, 0xa1, 0xdf, 0x7b, 0x0d, 0x93, 0x1b, 0x44, 0x30, 0x11, 0x48, 0x7a, 0x46, 0x44, 0x53, + /* (2^232)P */ 0xfb, 0x6d, 0x5e, 0xf2, 0x70, 0x31, 0x07, 0x70, 0xc8, 0x4c, 0x11, 0x50, 0x1a, 0xdc, 0x85, 0xe3, 0x00, 0x4f, 0xfc, 0xc8, 0x8a, 0x69, 0x48, 0x23, 0xd8, 0x40, 0xdd, 0x84, 0x52, 0xa5, 0x77, 0x2a, + /* (2^233)P */ 0xe4, 0x6c, 0x8c, 0xc9, 0xe0, 0xaf, 0x06, 0xfe, 0xe4, 0xd6, 0xdf, 0xdd, 0x96, 0xdf, 0x35, 0xc2, 0xd3, 0x1e, 0xbf, 0x33, 0x1e, 0xd0, 0x28, 0x14, 0xaf, 0xbd, 0x00, 0x93, 0xec, 0x68, 0x57, 0x78, + /* (2^234)P */ 0x3b, 0xb6, 0xde, 0x91, 0x7a, 0xe5, 0x02, 0x97, 0x80, 0x8b, 0xce, 0xe5, 0xbf, 0xb8, 0xbd, 0x61, 0xac, 0x58, 0x1d, 0x3d, 0x6f, 0x42, 0x5b, 0x64, 0xbc, 0x57, 0xa5, 0x27, 0x22, 0xa8, 0x04, 0x48, + /* (2^235)P */ 0x01, 0x26, 0x4d, 0xb4, 0x8a, 0x04, 0x57, 0x8e, 0x35, 0x69, 0x3a, 0x4b, 0x1a, 0x50, 0xd6, 0x68, 0x93, 0xc2, 0xe1, 0xf9, 0xc3, 0x9e, 0x9c, 0xc3, 0xe2, 0x63, 0xde, 0xd4, 0x57, 0xf2, 0x72, 0x41, + /* (2^236)P */ 0x01, 0x64, 0x0c, 0x33, 0x50, 0xb4, 0x68, 0xd3, 0x91, 0x23, 0x8f, 0x41, 0x17, 0x30, 0x0d, 0x04, 0x0d, 0xd9, 0xb7, 0x90, 0x60, 0xbb, 0x34, 0x2c, 0x1f, 0xd5, 0xdf, 0x8f, 0x22, 0x49, 0xf6, 0x16, + /* (2^237)P */ 0xf5, 0x8e, 0x92, 0x2b, 0x8e, 0x81, 0xa6, 0xbe, 0x72, 0x1e, 0xc1, 0xcd, 0x91, 0xcf, 0x8c, 0xe2, 0xcd, 0x36, 0x7a, 0xe7, 0x68, 0xaa, 0x4a, 0x59, 0x0f, 0xfd, 0x7f, 0x6c, 0x80, 0x34, 0x30, 0x31, + /* (2^238)P */ 0x65, 0xbd, 0x49, 0x22, 0xac, 0x27, 0x9d, 0x8a, 0x12, 0x95, 0x8e, 0x01, 0x64, 0xb4, 0xa3, 0x19, 0xc7, 0x7e, 0xb3, 0x52, 0xf3, 0xcf, 0x6c, 0xc2, 0x21, 0x7b, 0x79, 0x1d, 0x34, 0x68, 0x6f, 0x05, + /* (2^239)P */ 0x27, 0x23, 0xfd, 0x7e, 0x75, 0xd6, 0x79, 0x5e, 0x15, 0xfe, 0x3a, 0x55, 0xb6, 0xbc, 0xbd, 0xfa, 0x60, 0x5a, 0xaf, 0x6e, 0x2c, 0x22, 0xe7, 0xd3, 0x3b, 0x74, 0xae, 0x4d, 0x6d, 0xc7, 0x46, 0x70, + /* (2^240)P */ 0x55, 0x4a, 0x8d, 0xb1, 0x72, 0xe8, 0x0b, 0x66, 0x96, 0x14, 0x4e, 0x57, 0x18, 0x25, 0x99, 0x19, 0xbb, 0xdc, 0x2b, 0x30, 0x3a, 0x05, 0x03, 0xc1, 0x8e, 0x8e, 0x21, 0x0b, 0x80, 0xe9, 0xd8, 0x3e, + /* (2^241)P */ 0x3e, 0xe0, 0x75, 0xfa, 0x39, 0x92, 0x0b, 0x7b, 0x83, 0xc0, 0x33, 0x46, 0x68, 0xfb, 0xe9, 0xef, 0x93, 0x77, 0x1a, 0x39, 0xbe, 0x5f, 0xa3, 0x98, 0x34, 0xfe, 0xd0, 0xe2, 0x0f, 0x51, 0x65, 0x60, + /* (2^242)P */ 0x0c, 0xad, 0xab, 0x48, 0x85, 0x66, 0xcb, 0x55, 0x27, 0xe5, 0x87, 0xda, 0x48, 0x45, 0x58, 0xb4, 0xdd, 0xc1, 0x07, 0x01, 0xea, 0xec, 0x43, 0x2c, 0x35, 0xde, 0x72, 0x93, 0x80, 0x28, 0x60, 0x52, + /* (2^243)P */ 0x1f, 0x3b, 0x21, 0xf9, 0x6a, 0xc5, 0x15, 0x34, 0xdb, 0x98, 0x7e, 0x01, 0x4d, 0x1a, 0xee, 0x5b, 0x9b, 0x70, 0xcf, 0xb5, 0x05, 0xb1, 0xf6, 0x13, 0xb6, 0x9a, 0xb2, 0x82, 0x34, 0x0e, 0xf2, 0x5f, + /* (2^244)P */ 0x90, 0x6c, 0x2e, 0xcc, 0x75, 0x9c, 0xa2, 0x0a, 0x06, 0xe2, 0x70, 0x3a, 0xca, 0x73, 0x7d, 0xfc, 0x15, 0xc5, 0xb5, 0xc4, 0x8f, 0xc3, 0x9f, 0x89, 0x07, 0xc2, 0xff, 0x24, 0xb1, 0x86, 0x03, 0x25, + /* (2^245)P */ 0x56, 0x2b, 0x3d, 0xae, 0xd5, 0x28, 0xea, 0x54, 0xce, 0x60, 0xde, 0xd6, 0x9d, 0x14, 0x13, 0x99, 0xc1, 0xd6, 0x06, 0x8f, 0xc5, 0x4f, 0x69, 0x16, 0xc7, 0x8f, 0x01, 0xeb, 0x75, 0x39, 0xb2, 0x46, + /* (2^246)P */ 0xe2, 0xb4, 0xb7, 0xb4, 0x0f, 0x6a, 0x0a, 0x47, 0xde, 0x53, 0x72, 0x8f, 0x5a, 0x47, 0x92, 0x5d, 0xdb, 0x3a, 0xbd, 0x2f, 0xb5, 0xe5, 0xee, 0xab, 0x68, 0x69, 0x80, 0xa0, 0x01, 0x08, 0xa2, 0x7f, + /* (2^247)P */ 0xd2, 0x14, 0x77, 0x9f, 0xf1, 0xfa, 0xf3, 0x76, 0xc3, 0x60, 0x46, 0x2f, 0xc1, 0x40, 0xe8, 0xb3, 0x4e, 0x74, 0x12, 0xf2, 0x8d, 0xcd, 0xb4, 0x0f, 0xd2, 0x2d, 0x3a, 0x1d, 0x25, 0x5a, 0x06, 0x4b, + /* (2^248)P */ 0x4a, 0xcd, 0x77, 0x3d, 0x38, 0xde, 0xeb, 0x5c, 0xb1, 0x9c, 0x2c, 0x88, 0xdf, 0x39, 0xdf, 0x6a, 0x59, 0xf7, 0x9a, 0xb0, 0x2e, 0x24, 0xdd, 0xa2, 0x22, 0x64, 0x5f, 0x0e, 0xe5, 0xc0, 0x47, 0x31, + /* (2^249)P */ 0xdb, 0x50, 0x13, 0x1d, 0x10, 0xa5, 0x4c, 0x16, 0x62, 0xc9, 0x3f, 0xc3, 0x79, 0x34, 0xd1, 0xf8, 0x08, 0xda, 0xe5, 0x13, 0x4d, 0xce, 0x40, 0xe6, 0xba, 0xf8, 0x61, 0x50, 0xc4, 0xe0, 0xde, 0x4b, + /* (2^250)P */ 0xc9, 0xb1, 0xed, 0xa4, 0xc1, 0x6d, 0xc4, 0xd7, 0x8a, 0xd9, 0x7f, 0x43, 0xb6, 0xd7, 0x14, 0x55, 0x0b, 0xc0, 0xa1, 0xb2, 0x6b, 0x2f, 0x94, 0x58, 0x0e, 0x71, 0x70, 0x1d, 0xab, 0xb2, 0xff, 0x2d, + /* (2^251)P */ 0x68, 0x6d, 0x8b, 0xc1, 0x2f, 0xcf, 0xdf, 0xcc, 0x67, 0x61, 0x80, 0xb7, 0xa8, 0xcb, 0xeb, 0xa8, 0xe3, 0x37, 0x29, 0x5e, 0xf9, 0x97, 0x06, 0x98, 0x8c, 0x6e, 0x12, 0xd0, 0x1c, 0xba, 0xfb, 0x02, + /* (2^252)P */ 0x65, 0x45, 0xff, 0xad, 0x60, 0xc3, 0x98, 0xcb, 0x19, 0x15, 0xdb, 0x4b, 0xd2, 0x01, 0x71, 0x44, 0xd5, 0x15, 0xfb, 0x75, 0x74, 0xc8, 0xc4, 0x98, 0x7d, 0xa2, 0x22, 0x6e, 0x6d, 0xc7, 0xf8, 0x05, + /* (2^253)P */ 0x94, 0xf4, 0xb9, 0xfe, 0xdf, 0xe5, 0x69, 0xab, 0x75, 0x6b, 0x40, 0x18, 0x9d, 0xc7, 0x09, 0xae, 0x1d, 0x2d, 0xa4, 0x94, 0xfb, 0x45, 0x9b, 0x19, 0x84, 0xfa, 0x2a, 0xae, 0xeb, 0x0a, 0x71, 0x79, + /* (2^254)P */ 0xdf, 0xd2, 0x34, 0xf3, 0xa7, 0xed, 0xad, 0xa6, 0xb4, 0x57, 0x2a, 0xaf, 0x51, 0x9c, 0xde, 0x7b, 0xa8, 0xea, 0xdc, 0x86, 0x4f, 0xc6, 0x8f, 0xa9, 0x7b, 0xd0, 0x0e, 0xc2, 0x35, 0x03, 0xbe, 0x6b, + /* (2^255)P */ 0x44, 0x43, 0x98, 0x53, 0xbe, 0xdc, 0x7f, 0x66, 0xa8, 0x49, 0x59, 0x00, 0x1c, 0xbc, 0x72, 0x07, 0x8e, 0xd6, 0xbe, 0x4e, 0x9f, 0xa4, 0x07, 0xba, 0xbf, 0x30, 0xdf, 0xba, 0x85, 0xb0, 0xa7, 0x1f, +} diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x448/curve.go b/backend/vendor/github.com/cloudflare/circl/dh/x448/curve.go new file mode 100644 index 0000000..d59564e --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x448/curve.go @@ -0,0 +1,104 @@ +package x448 + +import ( + fp "github.com/cloudflare/circl/math/fp448" +) + +// ladderJoye calculates a fixed-point multiplication with the generator point. +// The algorithm is the right-to-left Joye's ladder as described +// in "How to precompute a ladder" in SAC'2017. +func ladderJoye(k *Key) { + w := [5]fp.Elt{} // [mu,x1,z1,x2,z2] order must be preserved. + w[1] = fp.Elt{ // x1 = S + 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + } + fp.SetOne(&w[2]) // z1 = 1 + w[3] = fp.Elt{ // x2 = G-S + 0x20, 0x27, 0x9d, 0xc9, 0x7d, 0x19, 0xb1, 0xac, + 0xf8, 0xba, 0x69, 0x1c, 0xff, 0x33, 0xac, 0x23, + 0x51, 0x1b, 0xce, 0x3a, 0x64, 0x65, 0xbd, 0xf1, + 0x23, 0xf8, 0xc1, 0x84, 0x9d, 0x45, 0x54, 0x29, + 0x67, 0xb9, 0x81, 0x1c, 0x03, 0xd1, 0xcd, 0xda, + 0x7b, 0xeb, 0xff, 0x1a, 0x88, 0x03, 0xcf, 0x3a, + 0x42, 0x44, 0x32, 0x01, 0x25, 0xb7, 0xfa, 0xf0, + } + fp.SetOne(&w[4]) // z2 = 1 + + const n = 448 + const h = 2 + swap := uint(1) + for s := 0; s < n-h; s++ { + i := (s + h) / 8 + j := (s + h) % 8 + bit := uint((k[i] >> uint(j)) & 1) + copy(w[0][:], tableGenerator[s*Size:(s+1)*Size]) + diffAdd(&w, swap^bit) + swap = bit + } + for s := 0; s < h; s++ { + double(&w[1], &w[2]) + } + toAffine((*[fp.Size]byte)(k), &w[1], &w[2]) +} + +// ladderMontgomery calculates a generic scalar point multiplication +// The algorithm implemented is the left-to-right Montgomery's ladder. +func ladderMontgomery(k, xP *Key) { + w := [5]fp.Elt{} // [x1, x2, z2, x3, z3] order must be preserved. + w[0] = *(*fp.Elt)(xP) // x1 = xP + fp.SetOne(&w[1]) // x2 = 1 + w[3] = *(*fp.Elt)(xP) // x3 = xP + fp.SetOne(&w[4]) // z3 = 1 + + move := uint(0) + for s := 448 - 1; s >= 0; s-- { + i := s / 8 + j := s % 8 + bit := uint((k[i] >> uint(j)) & 1) + ladderStep(&w, move^bit) + move = bit + } + toAffine((*[fp.Size]byte)(k), &w[1], &w[2]) +} + +func toAffine(k *[fp.Size]byte, x, z *fp.Elt) { + fp.Inv(z, z) + fp.Mul(x, x, z) + _ = fp.ToBytes(k[:], x) +} + +var lowOrderPoints = [3]fp.Elt{ + { /* (0,_,1) point of order 2 on Curve448 */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + }, + { /* (1,_,1) a point of order 4 on the twist of Curve448 */ + 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + }, + { /* (-1,_,1) point of order 4 on Curve448 */ + 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + }, +} diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x448/curve_amd64.go b/backend/vendor/github.com/cloudflare/circl/dh/x448/curve_amd64.go new file mode 100644 index 0000000..a062266 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x448/curve_amd64.go @@ -0,0 +1,30 @@ +//go:build amd64 && !purego +// +build amd64,!purego + +package x448 + +import ( + fp "github.com/cloudflare/circl/math/fp448" + "golang.org/x/sys/cpu" +) + +var hasBmi2Adx = cpu.X86.HasBMI2 && cpu.X86.HasADX + +var _ = hasBmi2Adx + +func double(x, z *fp.Elt) { doubleAmd64(x, z) } +func diffAdd(w *[5]fp.Elt, b uint) { diffAddAmd64(w, b) } +func ladderStep(w *[5]fp.Elt, b uint) { ladderStepAmd64(w, b) } +func mulA24(z, x *fp.Elt) { mulA24Amd64(z, x) } + +//go:noescape +func doubleAmd64(x, z *fp.Elt) + +//go:noescape +func diffAddAmd64(w *[5]fp.Elt, b uint) + +//go:noescape +func ladderStepAmd64(w *[5]fp.Elt, b uint) + +//go:noescape +func mulA24Amd64(z, x *fp.Elt) diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x448/curve_amd64.h b/backend/vendor/github.com/cloudflare/circl/dh/x448/curve_amd64.h new file mode 100644 index 0000000..8c1ae4d --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x448/curve_amd64.h @@ -0,0 +1,111 @@ +#define ladderStepLeg \ + addSub(x2,z2) \ + addSub(x3,z3) \ + integerMulLeg(b0,x2,z3) \ + integerMulLeg(b1,x3,z2) \ + reduceFromDoubleLeg(t0,b0) \ + reduceFromDoubleLeg(t1,b1) \ + addSub(t0,t1) \ + cselect(x2,x3,regMove) \ + cselect(z2,z3,regMove) \ + integerSqrLeg(b0,t0) \ + integerSqrLeg(b1,t1) \ + reduceFromDoubleLeg(x3,b0) \ + reduceFromDoubleLeg(z3,b1) \ + integerMulLeg(b0,x1,z3) \ + reduceFromDoubleLeg(z3,b0) \ + integerSqrLeg(b0,x2) \ + integerSqrLeg(b1,z2) \ + reduceFromDoubleLeg(x2,b0) \ + reduceFromDoubleLeg(z2,b1) \ + subtraction(t0,x2,z2) \ + multiplyA24Leg(t1,t0) \ + additionLeg(t1,t1,z2) \ + integerMulLeg(b0,x2,z2) \ + integerMulLeg(b1,t0,t1) \ + reduceFromDoubleLeg(x2,b0) \ + reduceFromDoubleLeg(z2,b1) + +#define ladderStepBmi2Adx \ + addSub(x2,z2) \ + addSub(x3,z3) \ + integerMulAdx(b0,x2,z3) \ + integerMulAdx(b1,x3,z2) \ + reduceFromDoubleAdx(t0,b0) \ + reduceFromDoubleAdx(t1,b1) \ + addSub(t0,t1) \ + cselect(x2,x3,regMove) \ + cselect(z2,z3,regMove) \ + integerSqrAdx(b0,t0) \ + integerSqrAdx(b1,t1) \ + reduceFromDoubleAdx(x3,b0) \ + reduceFromDoubleAdx(z3,b1) \ + integerMulAdx(b0,x1,z3) \ + reduceFromDoubleAdx(z3,b0) \ + integerSqrAdx(b0,x2) \ + integerSqrAdx(b1,z2) \ + reduceFromDoubleAdx(x2,b0) \ + reduceFromDoubleAdx(z2,b1) \ + subtraction(t0,x2,z2) \ + multiplyA24Adx(t1,t0) \ + additionAdx(t1,t1,z2) \ + integerMulAdx(b0,x2,z2) \ + integerMulAdx(b1,t0,t1) \ + reduceFromDoubleAdx(x2,b0) \ + reduceFromDoubleAdx(z2,b1) + +#define difAddLeg \ + addSub(x1,z1) \ + integerMulLeg(b0,z1,ui) \ + reduceFromDoubleLeg(z1,b0) \ + addSub(x1,z1) \ + integerSqrLeg(b0,x1) \ + integerSqrLeg(b1,z1) \ + reduceFromDoubleLeg(x1,b0) \ + reduceFromDoubleLeg(z1,b1) \ + integerMulLeg(b0,x1,z2) \ + integerMulLeg(b1,z1,x2) \ + reduceFromDoubleLeg(x1,b0) \ + reduceFromDoubleLeg(z1,b1) + +#define difAddBmi2Adx \ + addSub(x1,z1) \ + integerMulAdx(b0,z1,ui) \ + reduceFromDoubleAdx(z1,b0) \ + addSub(x1,z1) \ + integerSqrAdx(b0,x1) \ + integerSqrAdx(b1,z1) \ + reduceFromDoubleAdx(x1,b0) \ + reduceFromDoubleAdx(z1,b1) \ + integerMulAdx(b0,x1,z2) \ + integerMulAdx(b1,z1,x2) \ + reduceFromDoubleAdx(x1,b0) \ + reduceFromDoubleAdx(z1,b1) + +#define doubleLeg \ + addSub(x1,z1) \ + integerSqrLeg(b0,x1) \ + integerSqrLeg(b1,z1) \ + reduceFromDoubleLeg(x1,b0) \ + reduceFromDoubleLeg(z1,b1) \ + subtraction(t0,x1,z1) \ + multiplyA24Leg(t1,t0) \ + additionLeg(t1,t1,z1) \ + integerMulLeg(b0,x1,z1) \ + integerMulLeg(b1,t0,t1) \ + reduceFromDoubleLeg(x1,b0) \ + reduceFromDoubleLeg(z1,b1) + +#define doubleBmi2Adx \ + addSub(x1,z1) \ + integerSqrAdx(b0,x1) \ + integerSqrAdx(b1,z1) \ + reduceFromDoubleAdx(x1,b0) \ + reduceFromDoubleAdx(z1,b1) \ + subtraction(t0,x1,z1) \ + multiplyA24Adx(t1,t0) \ + additionAdx(t1,t1,z1) \ + integerMulAdx(b0,x1,z1) \ + integerMulAdx(b1,t0,t1) \ + reduceFromDoubleAdx(x1,b0) \ + reduceFromDoubleAdx(z1,b1) diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x448/curve_amd64.s b/backend/vendor/github.com/cloudflare/circl/dh/x448/curve_amd64.s new file mode 100644 index 0000000..ed33ba3 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x448/curve_amd64.s @@ -0,0 +1,194 @@ +//go:build amd64 && !purego +// +build amd64,!purego + +#include "textflag.h" + +// Depends on circl/math/fp448 package +#include "../../math/fp448/fp_amd64.h" +#include "curve_amd64.h" + +// CTE_A24 is (A+2)/4 from Curve448 +#define CTE_A24 39082 + +#define Size 56 + +// multiplyA24Leg multiplies x times CTE_A24 and stores in z +// Uses: AX, DX, R8-R15, FLAGS +// Instr: x86_64, cmov, adx +#define multiplyA24Leg(z,x) \ + MOVQ $CTE_A24, R15; \ + MOVQ 0+x, AX; MULQ R15; MOVQ AX, R8; ;;;;;;;;;;;; MOVQ DX, R9; \ + MOVQ 8+x, AX; MULQ R15; ADDQ AX, R9; ADCQ $0, DX; MOVQ DX, R10; \ + MOVQ 16+x, AX; MULQ R15; ADDQ AX, R10; ADCQ $0, DX; MOVQ DX, R11; \ + MOVQ 24+x, AX; MULQ R15; ADDQ AX, R11; ADCQ $0, DX; MOVQ DX, R12; \ + MOVQ 32+x, AX; MULQ R15; ADDQ AX, R12; ADCQ $0, DX; MOVQ DX, R13; \ + MOVQ 40+x, AX; MULQ R15; ADDQ AX, R13; ADCQ $0, DX; MOVQ DX, R14; \ + MOVQ 48+x, AX; MULQ R15; ADDQ AX, R14; ADCQ $0, DX; \ + MOVQ DX, AX; \ + SHLQ $32, AX; \ + ADDQ DX, R8; MOVQ $0, DX; \ + ADCQ $0, R9; \ + ADCQ $0, R10; \ + ADCQ AX, R11; \ + ADCQ $0, R12; \ + ADCQ $0, R13; \ + ADCQ $0, R14; \ + ADCQ $0, DX; \ + MOVQ DX, AX; \ + SHLQ $32, AX; \ + ADDQ DX, R8; \ + ADCQ $0, R9; \ + ADCQ $0, R10; \ + ADCQ AX, R11; \ + ADCQ $0, R12; \ + ADCQ $0, R13; \ + ADCQ $0, R14; \ + MOVQ R8, 0+z; \ + MOVQ R9, 8+z; \ + MOVQ R10, 16+z; \ + MOVQ R11, 24+z; \ + MOVQ R12, 32+z; \ + MOVQ R13, 40+z; \ + MOVQ R14, 48+z; + +// multiplyA24Adx multiplies x times CTE_A24 and stores in z +// Uses: AX, DX, R8-R14, FLAGS +// Instr: x86_64, bmi2 +#define multiplyA24Adx(z,x) \ + MOVQ $CTE_A24, DX; \ + MULXQ 0+x, R8, R9; \ + MULXQ 8+x, AX, R10; ADDQ AX, R9; \ + MULXQ 16+x, AX, R11; ADCQ AX, R10; \ + MULXQ 24+x, AX, R12; ADCQ AX, R11; \ + MULXQ 32+x, AX, R13; ADCQ AX, R12; \ + MULXQ 40+x, AX, R14; ADCQ AX, R13; \ + MULXQ 48+x, AX, DX; ADCQ AX, R14; \ + ;;;;;;;;;;;;;;;;;;;; ADCQ $0, DX; \ + MOVQ DX, AX; \ + SHLQ $32, AX; \ + ADDQ DX, R8; MOVQ $0, DX; \ + ADCQ $0, R9; \ + ADCQ $0, R10; \ + ADCQ AX, R11; \ + ADCQ $0, R12; \ + ADCQ $0, R13; \ + ADCQ $0, R14; \ + ADCQ $0, DX; \ + MOVQ DX, AX; \ + SHLQ $32, AX; \ + ADDQ DX, R8; \ + ADCQ $0, R9; \ + ADCQ $0, R10; \ + ADCQ AX, R11; \ + ADCQ $0, R12; \ + ADCQ $0, R13; \ + ADCQ $0, R14; \ + MOVQ R8, 0+z; \ + MOVQ R9, 8+z; \ + MOVQ R10, 16+z; \ + MOVQ R11, 24+z; \ + MOVQ R12, 32+z; \ + MOVQ R13, 40+z; \ + MOVQ R14, 48+z; + +#define mulA24Legacy \ + multiplyA24Leg(0(DI),0(SI)) +#define mulA24Bmi2Adx \ + multiplyA24Adx(0(DI),0(SI)) + +// func mulA24Amd64(z, x *fp448.Elt) +TEXT ·mulA24Amd64(SB),NOSPLIT,$0-16 + MOVQ z+0(FP), DI + MOVQ x+8(FP), SI + CHECK_BMI2ADX(LMA24, mulA24Legacy, mulA24Bmi2Adx) + +// func ladderStepAmd64(w *[5]fp448.Elt, b uint) +// ladderStepAmd64 calculates a point addition and doubling as follows: +// (x2,z2) = 2*(x2,z2) and (x3,z3) = (x2,z2)+(x3,z3) using as a difference (x1,-). +// w = {x1,x2,z2,x3,z4} are five fp255.Elt of 56 bytes. +// stack = (t0,t1) are two fp.Elt of fp.Size bytes, and +// (b0,b1) are two-double precision fp.Elt of 2*fp.Size bytes. +TEXT ·ladderStepAmd64(SB),NOSPLIT,$336-16 + // Parameters + #define regWork DI + #define regMove SI + #define x1 0*Size(regWork) + #define x2 1*Size(regWork) + #define z2 2*Size(regWork) + #define x3 3*Size(regWork) + #define z3 4*Size(regWork) + // Local variables + #define t0 0*Size(SP) + #define t1 1*Size(SP) + #define b0 2*Size(SP) + #define b1 4*Size(SP) + MOVQ w+0(FP), regWork + MOVQ b+8(FP), regMove + CHECK_BMI2ADX(LLADSTEP, ladderStepLeg, ladderStepBmi2Adx) + #undef regWork + #undef regMove + #undef x1 + #undef x2 + #undef z2 + #undef x3 + #undef z3 + #undef t0 + #undef t1 + #undef b0 + #undef b1 + +// func diffAddAmd64(work *[5]fp.Elt, swap uint) +// diffAddAmd64 calculates a differential point addition using a precomputed point. +// (x1,z1) = (x1,z1)+(mu) using a difference point (x2,z2) +// work = {mu,x1,z1,x2,z2} are five fp448.Elt of 56 bytes, and +// stack = (b0,b1) are two-double precision fp.Elt of 2*fp.Size bytes. +// This is Equation 7 at https://eprint.iacr.org/2017/264. +TEXT ·diffAddAmd64(SB),NOSPLIT,$224-16 + // Parameters + #define regWork DI + #define regSwap SI + #define ui 0*Size(regWork) + #define x1 1*Size(regWork) + #define z1 2*Size(regWork) + #define x2 3*Size(regWork) + #define z2 4*Size(regWork) + // Local variables + #define b0 0*Size(SP) + #define b1 2*Size(SP) + MOVQ w+0(FP), regWork + MOVQ b+8(FP), regSwap + cswap(x1,x2,regSwap) + cswap(z1,z2,regSwap) + CHECK_BMI2ADX(LDIFADD, difAddLeg, difAddBmi2Adx) + #undef regWork + #undef regSwap + #undef ui + #undef x1 + #undef z1 + #undef x2 + #undef z2 + #undef b0 + #undef b1 + +// func doubleAmd64(x, z *fp448.Elt) +// doubleAmd64 calculates a point doubling (x1,z1) = 2*(x1,z1). +// stack = (t0,t1) are two fp.Elt of fp.Size bytes, and +// (b0,b1) are two-double precision fp.Elt of 2*fp.Size bytes. +TEXT ·doubleAmd64(SB),NOSPLIT,$336-16 + // Parameters + #define x1 0(DI) + #define z1 0(SI) + // Local variables + #define t0 0*Size(SP) + #define t1 1*Size(SP) + #define b0 2*Size(SP) + #define b1 4*Size(SP) + MOVQ x+0(FP), DI + MOVQ z+8(FP), SI + CHECK_BMI2ADX(LDOUB,doubleLeg,doubleBmi2Adx) + #undef x1 + #undef z1 + #undef t0 + #undef t1 + #undef b0 + #undef b1 diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x448/curve_generic.go b/backend/vendor/github.com/cloudflare/circl/dh/x448/curve_generic.go new file mode 100644 index 0000000..b0b65cc --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x448/curve_generic.go @@ -0,0 +1,100 @@ +package x448 + +import ( + "encoding/binary" + "math/bits" + + "github.com/cloudflare/circl/math/fp448" +) + +func doubleGeneric(x, z *fp448.Elt) { + t0, t1 := &fp448.Elt{}, &fp448.Elt{} + fp448.AddSub(x, z) + fp448.Sqr(x, x) + fp448.Sqr(z, z) + fp448.Sub(t0, x, z) + mulA24Generic(t1, t0) + fp448.Add(t1, t1, z) + fp448.Mul(x, x, z) + fp448.Mul(z, t0, t1) +} + +func diffAddGeneric(w *[5]fp448.Elt, b uint) { + mu, x1, z1, x2, z2 := &w[0], &w[1], &w[2], &w[3], &w[4] + fp448.Cswap(x1, x2, b) + fp448.Cswap(z1, z2, b) + fp448.AddSub(x1, z1) + fp448.Mul(z1, z1, mu) + fp448.AddSub(x1, z1) + fp448.Sqr(x1, x1) + fp448.Sqr(z1, z1) + fp448.Mul(x1, x1, z2) + fp448.Mul(z1, z1, x2) +} + +func ladderStepGeneric(w *[5]fp448.Elt, b uint) { + x1, x2, z2, x3, z3 := &w[0], &w[1], &w[2], &w[3], &w[4] + t0 := &fp448.Elt{} + t1 := &fp448.Elt{} + fp448.AddSub(x2, z2) + fp448.AddSub(x3, z3) + fp448.Mul(t0, x2, z3) + fp448.Mul(t1, x3, z2) + fp448.AddSub(t0, t1) + fp448.Cmov(x2, x3, b) + fp448.Cmov(z2, z3, b) + fp448.Sqr(x3, t0) + fp448.Sqr(z3, t1) + fp448.Mul(z3, x1, z3) + fp448.Sqr(x2, x2) + fp448.Sqr(z2, z2) + fp448.Sub(t0, x2, z2) + mulA24Generic(t1, t0) + fp448.Add(t1, t1, z2) + fp448.Mul(x2, x2, z2) + fp448.Mul(z2, t0, t1) +} + +func mulA24Generic(z, x *fp448.Elt) { + const A24 = 39082 + const n = 8 + var xx [7]uint64 + for i := range xx { + xx[i] = binary.LittleEndian.Uint64(x[i*n : (i+1)*n]) + } + h0, l0 := bits.Mul64(xx[0], A24) + h1, l1 := bits.Mul64(xx[1], A24) + h2, l2 := bits.Mul64(xx[2], A24) + h3, l3 := bits.Mul64(xx[3], A24) + h4, l4 := bits.Mul64(xx[4], A24) + h5, l5 := bits.Mul64(xx[5], A24) + h6, l6 := bits.Mul64(xx[6], A24) + + l1, c0 := bits.Add64(h0, l1, 0) + l2, c1 := bits.Add64(h1, l2, c0) + l3, c2 := bits.Add64(h2, l3, c1) + l4, c3 := bits.Add64(h3, l4, c2) + l5, c4 := bits.Add64(h4, l5, c3) + l6, c5 := bits.Add64(h5, l6, c4) + l7, _ := bits.Add64(h6, 0, c5) + + l0, c0 = bits.Add64(l0, l7, 0) + l1, c1 = bits.Add64(l1, 0, c0) + l2, c2 = bits.Add64(l2, 0, c1) + l3, c3 = bits.Add64(l3, l7<<32, c2) + l4, c4 = bits.Add64(l4, 0, c3) + l5, c5 = bits.Add64(l5, 0, c4) + l6, l7 = bits.Add64(l6, 0, c5) + + xx[0], c0 = bits.Add64(l0, l7, 0) + xx[1], c1 = bits.Add64(l1, 0, c0) + xx[2], c2 = bits.Add64(l2, 0, c1) + xx[3], c3 = bits.Add64(l3, l7<<32, c2) + xx[4], c4 = bits.Add64(l4, 0, c3) + xx[5], c5 = bits.Add64(l5, 0, c4) + xx[6], _ = bits.Add64(l6, 0, c5) + + for i := range xx { + binary.LittleEndian.PutUint64(z[i*n:(i+1)*n], xx[i]) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x448/curve_noasm.go b/backend/vendor/github.com/cloudflare/circl/dh/x448/curve_noasm.go new file mode 100644 index 0000000..3755b7c --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x448/curve_noasm.go @@ -0,0 +1,11 @@ +//go:build !amd64 || purego +// +build !amd64 purego + +package x448 + +import fp "github.com/cloudflare/circl/math/fp448" + +func double(x, z *fp.Elt) { doubleGeneric(x, z) } +func diffAdd(w *[5]fp.Elt, b uint) { diffAddGeneric(w, b) } +func ladderStep(w *[5]fp.Elt, b uint) { ladderStepGeneric(w, b) } +func mulA24(z, x *fp.Elt) { mulA24Generic(z, x) } diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x448/doc.go b/backend/vendor/github.com/cloudflare/circl/dh/x448/doc.go new file mode 100644 index 0000000..c02904f --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x448/doc.go @@ -0,0 +1,19 @@ +/* +Package x448 provides Diffie-Hellman functions as specified in RFC-7748. + +Validation of public keys. + +The Diffie-Hellman function, as described in RFC-7748 [1], works for any +public key. However, if a different protocol requires contributory +behaviour [2,3], then the public keys must be validated against low-order +points [3,4]. To do that, the Shared function performs this validation +internally and returns false when the public key is invalid (i.e., it +is a low-order point). + +References: + - [1] RFC7748 by Langley, Hamburg, Turner (https://rfc-editor.org/rfc/rfc7748.txt) + - [2] Curve25519 by Bernstein (https://cr.yp.to/ecdh.html) + - [3] Bernstein (https://cr.yp.to/ecdh.html#validate) + - [4] Cremers&Jackson (https://eprint.iacr.org/2019/526) +*/ +package x448 diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x448/key.go b/backend/vendor/github.com/cloudflare/circl/dh/x448/key.go new file mode 100644 index 0000000..2fdde51 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x448/key.go @@ -0,0 +1,46 @@ +package x448 + +import ( + "crypto/subtle" + + fp "github.com/cloudflare/circl/math/fp448" +) + +// Size is the length in bytes of a X448 key. +const Size = 56 + +// Key represents a X448 key. +type Key [Size]byte + +func (k *Key) clamp(in *Key) *Key { + *k = *in + k[0] &= 252 + k[55] |= 128 + return k +} + +// isValidPubKey verifies if the public key is not a low-order point. +func (k *Key) isValidPubKey() bool { + fp.Modp((*fp.Elt)(k)) + var isLowOrder int + for _, P := range lowOrderPoints { + isLowOrder |= subtle.ConstantTimeCompare(P[:], k[:]) + } + return isLowOrder == 0 +} + +// KeyGen obtains a public key given a secret key. +func KeyGen(public, secret *Key) { + ladderJoye(public.clamp(secret)) +} + +// Shared calculates Alice's shared key from Alice's secret key and Bob's +// public key returning true on success. A failure case happens when the public +// key is a low-order point, thus the shared key is all-zeros and the function +// returns false. +func Shared(shared, secret, public *Key) bool { + validPk := *public + ok := validPk.isValidPubKey() + ladderMontgomery(shared.clamp(secret), &validPk) + return ok +} diff --git a/backend/vendor/github.com/cloudflare/circl/dh/x448/table.go b/backend/vendor/github.com/cloudflare/circl/dh/x448/table.go new file mode 100644 index 0000000..eef53c3 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/dh/x448/table.go @@ -0,0 +1,460 @@ +package x448 + +import fp "github.com/cloudflare/circl/math/fp448" + +// tableGenerator contains the set of points: +// +// t[i] = (xi+1)/(xi-1), +// +// where (xi,yi) = 2^iG and G is the generator point +// Size = (448)*(448/8) = 25088 bytes. +var tableGenerator = [448 * fp.Size]byte{ + /* (2^ 0)P */ 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f, + /* (2^ 1)P */ 0x37, 0xfa, 0xaa, 0x0d, 0x86, 0xa6, 0x24, 0xe9, 0x6c, 0x95, 0x08, 0x34, 0xba, 0x1a, 0x81, 0x3a, 0xae, 0x01, 0xa5, 0xa7, 0x05, 0x85, 0x96, 0x00, 0x06, 0x5a, 0xd7, 0xff, 0xee, 0x8e, 0x8f, 0x94, 0xd2, 0xdc, 0xd7, 0xfc, 0xe7, 0xe5, 0x99, 0x1d, 0x05, 0x46, 0x43, 0xe8, 0xbc, 0x12, 0xb7, 0xeb, 0x30, 0x5e, 0x7a, 0x85, 0x68, 0xed, 0x9d, 0x28, + /* (2^ 2)P */ 0xf1, 0x7d, 0x08, 0x2b, 0x32, 0x4a, 0x62, 0x80, 0x36, 0xe7, 0xa4, 0x76, 0x5a, 0x2a, 0x1e, 0xf7, 0x9e, 0x3c, 0x40, 0x46, 0x9a, 0x1b, 0x61, 0xc1, 0xbf, 0x1a, 0x1b, 0xae, 0x91, 0x80, 0xa3, 0x76, 0x6c, 0xd4, 0x8f, 0xa4, 0xee, 0x26, 0x39, 0x23, 0xa4, 0x80, 0xf4, 0x66, 0x92, 0xe4, 0xe1, 0x18, 0x76, 0xc5, 0xe2, 0x19, 0x87, 0xd5, 0xc3, 0xe8, + /* (2^ 3)P */ 0xfb, 0xc9, 0xf0, 0x07, 0xf2, 0x93, 0xd8, 0x50, 0x36, 0xed, 0xfb, 0xbd, 0xb2, 0xd3, 0xfc, 0xdf, 0xd5, 0x2a, 0x6e, 0x26, 0x09, 0xce, 0xd4, 0x07, 0x64, 0x9f, 0x40, 0x74, 0xad, 0x98, 0x2f, 0x1c, 0xb6, 0xdc, 0x2d, 0x42, 0xff, 0xbf, 0x97, 0xd8, 0xdb, 0xef, 0x99, 0xca, 0x73, 0x99, 0x1a, 0x04, 0x3b, 0x56, 0x2c, 0x1f, 0x87, 0x9d, 0x9f, 0x03, + /* (2^ 4)P */ 0x4c, 0x35, 0x97, 0xf7, 0x81, 0x2c, 0x84, 0xa6, 0xe0, 0xcb, 0xce, 0x37, 0x4c, 0x21, 0x1c, 0x67, 0xfa, 0xab, 0x18, 0x4d, 0xef, 0xd0, 0xf0, 0x44, 0xa9, 0xfb, 0xc0, 0x8e, 0xda, 0x57, 0xa1, 0xd8, 0xeb, 0x87, 0xf4, 0x17, 0xea, 0x66, 0x0f, 0x16, 0xea, 0xcd, 0x5f, 0x3e, 0x88, 0xea, 0x09, 0x68, 0x40, 0xdf, 0x43, 0xcc, 0x54, 0x61, 0x58, 0xaa, + /* (2^ 5)P */ 0x8d, 0xe7, 0x59, 0xd7, 0x5e, 0x63, 0x37, 0xa7, 0x3f, 0xd1, 0x49, 0x85, 0x01, 0xdd, 0x5e, 0xb3, 0xe6, 0x29, 0xcb, 0x25, 0x93, 0xdd, 0x08, 0x96, 0x83, 0x52, 0x76, 0x85, 0xf5, 0x5d, 0x02, 0xbf, 0xe9, 0x6d, 0x15, 0x27, 0xc1, 0x09, 0xd1, 0x14, 0x4d, 0x6e, 0xe8, 0xaf, 0x59, 0x58, 0x34, 0x9d, 0x2a, 0x99, 0x85, 0x26, 0xbe, 0x4b, 0x1e, 0xb9, + /* (2^ 6)P */ 0x8d, 0xce, 0x94, 0xe2, 0x18, 0x56, 0x0d, 0x82, 0x8e, 0xdf, 0x85, 0x01, 0x8f, 0x93, 0x3c, 0xc6, 0xbd, 0x61, 0xfb, 0xf4, 0x22, 0xc5, 0x16, 0x87, 0xd1, 0xb1, 0x9e, 0x09, 0xc5, 0x83, 0x2e, 0x4a, 0x07, 0x88, 0xee, 0xe0, 0x29, 0x8d, 0x2e, 0x1f, 0x88, 0xad, 0xfd, 0x18, 0x93, 0xb7, 0xed, 0x42, 0x86, 0x78, 0xf0, 0xb8, 0x70, 0xbe, 0x01, 0x67, + /* (2^ 7)P */ 0xdf, 0x62, 0x2d, 0x94, 0xc7, 0x35, 0x23, 0xda, 0x27, 0xbb, 0x2b, 0xdb, 0x30, 0x80, 0x68, 0x16, 0xa3, 0xae, 0xd7, 0xd2, 0xa7, 0x7c, 0xbf, 0x6a, 0x1d, 0x83, 0xde, 0x96, 0x0a, 0x43, 0xb6, 0x30, 0x37, 0xd6, 0xee, 0x63, 0x59, 0x9a, 0xbf, 0xa3, 0x30, 0x6c, 0xaf, 0x0c, 0xee, 0x3d, 0xcb, 0x35, 0x4b, 0x55, 0x5f, 0x84, 0x85, 0xcb, 0x4f, 0x1e, + /* (2^ 8)P */ 0x9d, 0x04, 0x68, 0x89, 0xa4, 0xa9, 0x0d, 0x87, 0xc1, 0x70, 0xf1, 0xeb, 0xfb, 0x47, 0x0a, 0xf0, 0xde, 0x67, 0xb7, 0x94, 0xcd, 0x36, 0x43, 0xa5, 0x49, 0x43, 0x67, 0xc3, 0xee, 0x3c, 0x6b, 0xec, 0xd0, 0x1a, 0xf4, 0xad, 0xef, 0x06, 0x4a, 0xe8, 0x46, 0x24, 0xd7, 0x93, 0xbf, 0xf0, 0xe3, 0x81, 0x61, 0xec, 0xea, 0x64, 0xfe, 0x67, 0xeb, 0xc7, + /* (2^ 9)P */ 0x95, 0x45, 0x79, 0xcf, 0x2c, 0xfd, 0x9b, 0xfe, 0x84, 0x46, 0x4b, 0x8f, 0xa1, 0xcf, 0xc3, 0x04, 0x94, 0x78, 0xdb, 0xc9, 0xa6, 0x01, 0x75, 0xa4, 0xb4, 0x93, 0x72, 0x43, 0xa7, 0x7d, 0xda, 0x31, 0x38, 0x54, 0xab, 0x4e, 0x3f, 0x89, 0xa6, 0xab, 0x57, 0xc0, 0x16, 0x65, 0xdb, 0x92, 0x96, 0xe4, 0xc8, 0xae, 0xe7, 0x4c, 0x7a, 0xeb, 0xbb, 0x5a, + /* (2^ 10)P */ 0xbe, 0xfe, 0x86, 0xc3, 0x97, 0xe0, 0x6a, 0x18, 0x20, 0x21, 0xca, 0x22, 0x55, 0xa1, 0xeb, 0xf5, 0x74, 0xe5, 0xc9, 0x59, 0xa7, 0x92, 0x65, 0x15, 0x08, 0x71, 0xd1, 0x09, 0x7e, 0x83, 0xfc, 0xbc, 0x5a, 0x93, 0x38, 0x0d, 0x43, 0x42, 0xfd, 0x76, 0x30, 0xe8, 0x63, 0x60, 0x09, 0x8d, 0x6c, 0xd3, 0xf8, 0x56, 0x3d, 0x68, 0x47, 0xab, 0xa0, 0x1d, + /* (2^ 11)P */ 0x38, 0x50, 0x1c, 0xb1, 0xac, 0x88, 0x8f, 0x38, 0xe3, 0x69, 0xe6, 0xfc, 0x4f, 0x8f, 0xe1, 0x9b, 0xb1, 0x1a, 0x09, 0x39, 0x19, 0xdf, 0xcd, 0x98, 0x7b, 0x64, 0x42, 0xf6, 0x11, 0xea, 0xc7, 0xe8, 0x92, 0x65, 0x00, 0x2c, 0x75, 0xb5, 0x94, 0x1e, 0x5b, 0xa6, 0x66, 0x81, 0x77, 0xf3, 0x39, 0x94, 0xac, 0xbd, 0xe4, 0x2a, 0x66, 0x84, 0x9c, 0x60, + /* (2^ 12)P */ 0xb5, 0xb6, 0xd9, 0x03, 0x67, 0xa4, 0xa8, 0x0a, 0x4a, 0x2b, 0x9d, 0xfa, 0x13, 0xe1, 0x99, 0x25, 0x4a, 0x5c, 0x67, 0xb9, 0xb2, 0xb7, 0xdd, 0x1e, 0xaf, 0xeb, 0x63, 0x41, 0xb6, 0xb9, 0xa0, 0x87, 0x0a, 0xe0, 0x06, 0x07, 0xaa, 0x97, 0xf8, 0xf9, 0x38, 0x4f, 0xdf, 0x0c, 0x40, 0x7c, 0xc3, 0x98, 0xa9, 0x74, 0xf1, 0x5d, 0xda, 0xd1, 0xc0, 0x0a, + /* (2^ 13)P */ 0xf2, 0x0a, 0xab, 0xab, 0x94, 0x50, 0xf0, 0xa3, 0x6f, 0xc6, 0x66, 0xba, 0xa6, 0xdc, 0x44, 0xdd, 0xd6, 0x08, 0xf4, 0xd3, 0xed, 0xb1, 0x40, 0x93, 0xee, 0xf6, 0xb8, 0x8e, 0xb4, 0x7c, 0xb9, 0x82, 0xc9, 0x9d, 0x45, 0x3b, 0x8e, 0x10, 0xcb, 0x70, 0x1e, 0xba, 0x3c, 0x62, 0x50, 0xda, 0xa9, 0x93, 0xb5, 0xd7, 0xd0, 0x6f, 0x29, 0x52, 0x95, 0xae, + /* (2^ 14)P */ 0x14, 0x68, 0x69, 0x23, 0xa8, 0x44, 0x87, 0x9e, 0x22, 0x91, 0xe8, 0x92, 0xdf, 0xf7, 0xae, 0xba, 0x1c, 0x96, 0xe1, 0xc3, 0x94, 0xed, 0x6c, 0x95, 0xae, 0x96, 0xa7, 0x15, 0x9f, 0xf1, 0x17, 0x11, 0x92, 0x42, 0xd5, 0xcd, 0x18, 0xe7, 0xa9, 0xb5, 0x2f, 0xcd, 0xde, 0x6c, 0xc9, 0x7d, 0xfc, 0x7e, 0xbd, 0x7f, 0x10, 0x3d, 0x01, 0x00, 0x8d, 0x95, + /* (2^ 15)P */ 0x3b, 0x76, 0x72, 0xae, 0xaf, 0x84, 0xf2, 0xf7, 0xd1, 0x6d, 0x13, 0x9c, 0x47, 0xe1, 0xb7, 0xa3, 0x19, 0x16, 0xee, 0x75, 0x45, 0xf6, 0x1a, 0x7b, 0x78, 0x49, 0x79, 0x05, 0x86, 0xf0, 0x7f, 0x9f, 0xfc, 0xc4, 0xbd, 0x86, 0xf3, 0x41, 0xa7, 0xfe, 0x01, 0xd5, 0x67, 0x16, 0x10, 0x5b, 0xa5, 0x16, 0xf3, 0x7f, 0x60, 0xce, 0xd2, 0x0c, 0x8e, 0x4b, + /* (2^ 16)P */ 0x4a, 0x07, 0x99, 0x4a, 0x0f, 0x74, 0x91, 0x14, 0x68, 0xb9, 0x48, 0xb7, 0x44, 0x77, 0x9b, 0x4a, 0xe0, 0x68, 0x0e, 0x43, 0x4d, 0x98, 0x98, 0xbf, 0xa8, 0x3a, 0xb7, 0x6d, 0x2a, 0x9a, 0x77, 0x5f, 0x62, 0xf5, 0x6b, 0x4a, 0xb7, 0x7d, 0xe5, 0x09, 0x6b, 0xc0, 0x8b, 0x9c, 0x88, 0x37, 0x33, 0xf2, 0x41, 0xac, 0x22, 0x1f, 0xcf, 0x3b, 0x82, 0x34, + /* (2^ 17)P */ 0x00, 0xc3, 0x78, 0x42, 0x32, 0x2e, 0xdc, 0xda, 0xb1, 0x96, 0x21, 0xa4, 0xe4, 0xbb, 0xe9, 0x9d, 0xbb, 0x0f, 0x93, 0xed, 0x26, 0x3d, 0xb5, 0xdb, 0x94, 0x31, 0x37, 0x07, 0xa2, 0xb2, 0xd5, 0x99, 0x0d, 0x93, 0xe1, 0xce, 0x3f, 0x0b, 0x96, 0x82, 0x47, 0xfe, 0x60, 0x6f, 0x8f, 0x61, 0x88, 0xd7, 0x05, 0x95, 0x0b, 0x46, 0x06, 0xb7, 0x32, 0x06, + /* (2^ 18)P */ 0x44, 0xf5, 0x34, 0xdf, 0x2f, 0x9c, 0x5d, 0x9f, 0x53, 0x5c, 0x42, 0x8f, 0xc9, 0xdc, 0xd8, 0x40, 0xa2, 0xe7, 0x6a, 0x4a, 0x05, 0xf7, 0x86, 0x77, 0x2b, 0xae, 0x37, 0xed, 0x48, 0xfb, 0xf7, 0x62, 0x7c, 0x17, 0x59, 0x92, 0x41, 0x61, 0x93, 0x38, 0x30, 0xd1, 0xef, 0x54, 0x54, 0x03, 0x17, 0x57, 0x91, 0x15, 0x11, 0x33, 0xb5, 0xfa, 0xfb, 0x17, + /* (2^ 19)P */ 0x29, 0xbb, 0xd4, 0xb4, 0x9c, 0xf1, 0x72, 0x94, 0xce, 0x6a, 0x29, 0xa8, 0x89, 0x18, 0x19, 0xf7, 0xb7, 0xcc, 0xee, 0x9a, 0x02, 0xe3, 0xc0, 0xb1, 0xe0, 0xee, 0x83, 0x78, 0xb4, 0x9e, 0x07, 0x87, 0xdf, 0xb0, 0x82, 0x26, 0x4e, 0xa4, 0x0c, 0x33, 0xaf, 0x40, 0x59, 0xb6, 0xdd, 0x52, 0x45, 0xf0, 0xb4, 0xf6, 0xe8, 0x4e, 0x4e, 0x79, 0x1a, 0x5d, + /* (2^ 20)P */ 0x27, 0x33, 0x4d, 0x4c, 0x6b, 0x4f, 0x75, 0xb1, 0xbc, 0x1f, 0xab, 0x5b, 0x2b, 0xf0, 0x1c, 0x57, 0x86, 0xdd, 0xfd, 0x60, 0xb0, 0x8c, 0xe7, 0x9a, 0xe5, 0x5c, 0xeb, 0x11, 0x3a, 0xda, 0x22, 0x25, 0x99, 0x06, 0x8d, 0xf4, 0xaf, 0x29, 0x7a, 0xc9, 0xe5, 0xd2, 0x16, 0x9e, 0xd4, 0x63, 0x1d, 0x64, 0xa6, 0x47, 0x96, 0x37, 0x6f, 0x93, 0x2c, 0xcc, + /* (2^ 21)P */ 0xc1, 0x94, 0x74, 0x86, 0x75, 0xf2, 0x91, 0x58, 0x23, 0x85, 0x63, 0x76, 0x54, 0xc7, 0xb4, 0x8c, 0xbc, 0x4e, 0xc4, 0xa7, 0xba, 0xa0, 0x55, 0x26, 0x71, 0xd5, 0x33, 0x72, 0xc9, 0xad, 0x1e, 0xf9, 0x5d, 0x78, 0x70, 0x93, 0x4e, 0x85, 0xfc, 0x39, 0x06, 0x73, 0x76, 0xff, 0xe8, 0x64, 0x69, 0x42, 0x45, 0xb2, 0x69, 0xb5, 0x32, 0xe7, 0x2c, 0xde, + /* (2^ 22)P */ 0xde, 0x16, 0xd8, 0x33, 0x49, 0x32, 0xe9, 0x0e, 0x3a, 0x60, 0xee, 0x2e, 0x24, 0x75, 0xe3, 0x9c, 0x92, 0x07, 0xdb, 0xad, 0x92, 0xf5, 0x11, 0xdf, 0xdb, 0xb0, 0x17, 0x5c, 0xd6, 0x1a, 0x70, 0x00, 0xb7, 0xe2, 0x18, 0xec, 0xdc, 0xc2, 0x02, 0x93, 0xb3, 0xc8, 0x3f, 0x4f, 0x1b, 0x96, 0xe6, 0x33, 0x8c, 0xfb, 0xcc, 0xa5, 0x4e, 0xe8, 0xe7, 0x11, + /* (2^ 23)P */ 0x05, 0x7a, 0x74, 0x52, 0xf8, 0xdf, 0x0d, 0x7c, 0x6a, 0x1a, 0x4e, 0x9a, 0x02, 0x1d, 0xae, 0x77, 0xf8, 0x8e, 0xf9, 0xa2, 0x38, 0x54, 0x50, 0xb2, 0x2c, 0x08, 0x9d, 0x9b, 0x9f, 0xfb, 0x2b, 0x06, 0xde, 0x9d, 0xc2, 0x03, 0x0b, 0x22, 0x2b, 0x10, 0x5b, 0x3a, 0x73, 0x29, 0x8e, 0x3e, 0x37, 0x08, 0x2c, 0x3b, 0xf8, 0x80, 0xc1, 0x66, 0x1e, 0x98, + /* (2^ 24)P */ 0xd8, 0xd6, 0x3e, 0xcd, 0x63, 0x8c, 0x2b, 0x41, 0x81, 0xc0, 0x0c, 0x06, 0x87, 0xd6, 0xe7, 0x92, 0xfe, 0xf1, 0x0c, 0x4a, 0x84, 0x5b, 0xaf, 0x40, 0x53, 0x6f, 0x60, 0xd6, 0x6b, 0x76, 0x4b, 0xc2, 0xad, 0xc9, 0xb6, 0xb6, 0x6a, 0xa2, 0xb3, 0xf5, 0xf5, 0xc2, 0x55, 0x83, 0xb2, 0xd3, 0xe9, 0x41, 0x6c, 0x63, 0x51, 0xb8, 0x81, 0x74, 0xc8, 0x2c, + /* (2^ 25)P */ 0xb2, 0xaf, 0x1c, 0xee, 0x07, 0xb0, 0x58, 0xa8, 0x2c, 0x6a, 0xc9, 0x2d, 0x62, 0x28, 0x75, 0x0c, 0x40, 0xb6, 0x11, 0x33, 0x96, 0x80, 0x28, 0x6d, 0xd5, 0x9e, 0x87, 0x90, 0x01, 0x66, 0x1d, 0x1c, 0xf8, 0xb4, 0x92, 0xac, 0x38, 0x18, 0x05, 0xc2, 0x4c, 0x4b, 0x54, 0x7d, 0x80, 0x46, 0x87, 0x2d, 0x99, 0x8e, 0x70, 0x80, 0x69, 0x71, 0x8b, 0xed, + /* (2^ 26)P */ 0x37, 0xa7, 0x6b, 0x71, 0x36, 0x75, 0x8e, 0xff, 0x0f, 0x42, 0xda, 0x5a, 0x46, 0xa6, 0x97, 0x79, 0x7e, 0x30, 0xb3, 0x8f, 0xc7, 0x3a, 0xa0, 0xcb, 0x1d, 0x9c, 0x78, 0x77, 0x36, 0xc2, 0xe7, 0xf4, 0x2f, 0x29, 0x07, 0xb1, 0x07, 0xfd, 0xed, 0x1b, 0x39, 0x77, 0x06, 0x38, 0x77, 0x0f, 0x50, 0x31, 0x12, 0xbf, 0x92, 0xbf, 0x72, 0x79, 0x54, 0xa9, + /* (2^ 27)P */ 0xbd, 0x4d, 0x46, 0x6b, 0x1a, 0x80, 0x46, 0x2d, 0xed, 0xfd, 0x64, 0x6d, 0x94, 0xbc, 0x4a, 0x6e, 0x0c, 0x12, 0xf6, 0x12, 0xab, 0x54, 0x88, 0xd3, 0x85, 0xac, 0x51, 0xae, 0x6f, 0xca, 0xc4, 0xb7, 0xec, 0x22, 0x54, 0x6d, 0x80, 0xb2, 0x1c, 0x63, 0x33, 0x76, 0x6b, 0x8e, 0x6d, 0x59, 0xcd, 0x73, 0x92, 0x5f, 0xff, 0xad, 0x10, 0x35, 0x70, 0x5f, + /* (2^ 28)P */ 0xb3, 0x84, 0xde, 0xc8, 0x04, 0x43, 0x63, 0xfa, 0x29, 0xd9, 0xf0, 0x69, 0x65, 0x5a, 0x0c, 0xe8, 0x2e, 0x0b, 0xfe, 0xb0, 0x7a, 0x42, 0xb3, 0xc3, 0xfc, 0xe6, 0xb8, 0x92, 0x29, 0xae, 0xed, 0xec, 0xd5, 0xe8, 0x4a, 0xa1, 0xbd, 0x3b, 0xd3, 0xc0, 0x07, 0xab, 0x65, 0x65, 0x35, 0x9a, 0xa6, 0x5e, 0x78, 0x18, 0x76, 0x1c, 0x15, 0x49, 0xe6, 0x75, + /* (2^ 29)P */ 0x45, 0xb3, 0x92, 0xa9, 0xc3, 0xb8, 0x11, 0x68, 0x64, 0x3a, 0x83, 0x5d, 0xa8, 0x94, 0x6a, 0x9d, 0xaa, 0x27, 0x9f, 0x98, 0x5d, 0xc0, 0x29, 0xf0, 0xc0, 0x4b, 0x14, 0x3c, 0x05, 0xe7, 0xf8, 0xbd, 0x38, 0x22, 0x96, 0x75, 0x65, 0x5e, 0x0d, 0x3f, 0xbb, 0x6f, 0xe8, 0x3f, 0x96, 0x76, 0x9f, 0xba, 0xd9, 0x44, 0x92, 0x96, 0x22, 0xe7, 0x52, 0xe7, + /* (2^ 30)P */ 0xf4, 0xa3, 0x95, 0x90, 0x47, 0xdf, 0x7d, 0xdc, 0xf4, 0x13, 0x87, 0x67, 0x7d, 0x4f, 0x9d, 0xa0, 0x00, 0x46, 0x72, 0x08, 0xc3, 0xa2, 0x7a, 0x3e, 0xe7, 0x6d, 0x52, 0x7c, 0x11, 0x36, 0x50, 0x83, 0x89, 0x64, 0xcb, 0x1f, 0x08, 0x83, 0x46, 0xcb, 0xac, 0xa6, 0xd8, 0x9c, 0x1b, 0xe8, 0x05, 0x47, 0xc7, 0x26, 0x06, 0x83, 0x39, 0xe9, 0xb1, 0x1c, + /* (2^ 31)P */ 0x11, 0xe8, 0xc8, 0x42, 0xbf, 0x30, 0x9c, 0xa3, 0xf1, 0x85, 0x96, 0x95, 0x4f, 0x4f, 0x52, 0xa2, 0xf5, 0x8b, 0x68, 0x24, 0x16, 0xac, 0x9b, 0xa9, 0x27, 0x28, 0x0e, 0x84, 0x03, 0x46, 0x22, 0x5f, 0xf7, 0x0d, 0xa6, 0x85, 0x88, 0xc1, 0x45, 0x4b, 0x85, 0x1a, 0x10, 0x7f, 0xc9, 0x94, 0x20, 0xb0, 0x04, 0x28, 0x12, 0x30, 0xb9, 0xe6, 0x40, 0x6b, + /* (2^ 32)P */ 0xac, 0x1b, 0x57, 0xb6, 0x42, 0xdb, 0x81, 0x8d, 0x76, 0xfd, 0x9b, 0x1c, 0x29, 0x30, 0xd5, 0x3a, 0xcc, 0x53, 0xd9, 0x26, 0x7a, 0x0f, 0x9c, 0x2e, 0x79, 0xf5, 0x62, 0xeb, 0x61, 0x9d, 0x9b, 0x80, 0x39, 0xcd, 0x60, 0x2e, 0x1f, 0x08, 0x22, 0xbc, 0x19, 0xb3, 0x2a, 0x43, 0x44, 0xf2, 0x4e, 0x66, 0xf4, 0x36, 0xa6, 0xa7, 0xbc, 0xa4, 0x15, 0x7e, + /* (2^ 33)P */ 0xc1, 0x90, 0x8a, 0xde, 0xff, 0x78, 0xc3, 0x73, 0x16, 0xee, 0x76, 0xa0, 0x84, 0x60, 0x8d, 0xe6, 0x82, 0x0f, 0xde, 0x4e, 0xc5, 0x99, 0x34, 0x06, 0x90, 0x44, 0x55, 0xf8, 0x91, 0xd8, 0xe1, 0xe4, 0x2c, 0x8a, 0xde, 0x94, 0x1e, 0x78, 0x25, 0x3d, 0xfd, 0xd8, 0x59, 0x7d, 0xaf, 0x6e, 0xbe, 0x96, 0xbe, 0x3c, 0x16, 0x23, 0x0f, 0x4c, 0xa4, 0x28, + /* (2^ 34)P */ 0xba, 0x11, 0x35, 0x57, 0x03, 0xb6, 0xf4, 0x24, 0x89, 0xb8, 0x5a, 0x0d, 0x50, 0x9c, 0xaa, 0x51, 0x7f, 0xa4, 0x0e, 0xfc, 0x71, 0xb3, 0x3b, 0xf1, 0x96, 0x50, 0x23, 0x15, 0xf5, 0xf5, 0xd4, 0x23, 0xdc, 0x8b, 0x26, 0x9e, 0xae, 0xb7, 0x50, 0xcd, 0xc4, 0x25, 0xf6, 0x75, 0x40, 0x9c, 0x37, 0x79, 0x33, 0x60, 0xd4, 0x4b, 0x13, 0x32, 0xee, 0xe2, + /* (2^ 35)P */ 0x43, 0xb8, 0x56, 0x59, 0xf0, 0x68, 0x23, 0xb3, 0xea, 0x70, 0x58, 0x4c, 0x1e, 0x5a, 0x16, 0x54, 0x03, 0xb2, 0xf4, 0x73, 0xb6, 0xd9, 0x5c, 0x9c, 0x6f, 0xcf, 0x82, 0x2e, 0x54, 0x15, 0x46, 0x2c, 0xa3, 0xda, 0x4e, 0x87, 0xf5, 0x2b, 0xba, 0x91, 0xa3, 0xa0, 0x89, 0xba, 0x48, 0x2b, 0xfa, 0x64, 0x02, 0x7f, 0x78, 0x03, 0xd1, 0xe8, 0x3b, 0xe9, + /* (2^ 36)P */ 0x15, 0xa4, 0x71, 0xd4, 0x0c, 0x24, 0xe9, 0x07, 0xa1, 0x43, 0xf4, 0x7f, 0xbb, 0xa2, 0xa6, 0x6b, 0xfa, 0xb7, 0xea, 0x58, 0xd1, 0x96, 0xb0, 0x24, 0x5c, 0xc7, 0x37, 0x4e, 0x60, 0x0f, 0x40, 0xf2, 0x2f, 0x44, 0x70, 0xea, 0x80, 0x63, 0xfe, 0xfc, 0x46, 0x59, 0x12, 0x27, 0xb5, 0x27, 0xfd, 0xb7, 0x73, 0x0b, 0xca, 0x8b, 0xc2, 0xd3, 0x71, 0x08, + /* (2^ 37)P */ 0x26, 0x0e, 0xd7, 0x52, 0x6f, 0xf1, 0xf2, 0x9d, 0xb8, 0x3d, 0xbd, 0xd4, 0x75, 0x97, 0xd8, 0xbf, 0xa8, 0x86, 0x96, 0xa5, 0x80, 0xa0, 0x45, 0x75, 0xf6, 0x77, 0x71, 0xdb, 0x77, 0x96, 0x55, 0x99, 0x31, 0xd0, 0x4f, 0x34, 0xf4, 0x35, 0x39, 0x41, 0xd3, 0x7d, 0xf7, 0xe2, 0x74, 0xde, 0xbe, 0x5b, 0x1f, 0x39, 0x10, 0x21, 0xa3, 0x4d, 0x3b, 0xc8, + /* (2^ 38)P */ 0x04, 0x00, 0x2a, 0x45, 0xb2, 0xaf, 0x9b, 0x18, 0x6a, 0xeb, 0x96, 0x28, 0xa4, 0x77, 0xd0, 0x13, 0xcf, 0x17, 0x65, 0xe8, 0xc5, 0x81, 0x28, 0xad, 0x39, 0x7a, 0x0b, 0xaa, 0x55, 0x2b, 0xf3, 0xfc, 0x86, 0x40, 0xad, 0x0d, 0x1e, 0x28, 0xa2, 0x2d, 0xc5, 0xd6, 0x04, 0x15, 0xa2, 0x30, 0x3d, 0x12, 0x8e, 0xd6, 0xb5, 0xf7, 0x69, 0xbb, 0x84, 0x20, + /* (2^ 39)P */ 0xd7, 0x7a, 0x77, 0x2c, 0xfb, 0x81, 0x80, 0xe9, 0x1e, 0xc6, 0x36, 0x31, 0x79, 0xc3, 0x7c, 0xa9, 0x57, 0x6b, 0xb5, 0x70, 0xfb, 0xe4, 0xa1, 0xff, 0xfd, 0x21, 0xa5, 0x7c, 0xfa, 0x44, 0xba, 0x0d, 0x96, 0x3d, 0xc4, 0x5c, 0x39, 0x52, 0x87, 0xd7, 0x22, 0x0f, 0x52, 0x88, 0x91, 0x87, 0x96, 0xac, 0xfa, 0x3b, 0xdf, 0xdc, 0x83, 0x8c, 0x99, 0x29, + /* (2^ 40)P */ 0x98, 0x6b, 0x3a, 0x8d, 0x83, 0x17, 0xe1, 0x62, 0xd8, 0x80, 0x4c, 0x97, 0xce, 0x6b, 0xaa, 0x10, 0xa7, 0xc4, 0xe9, 0xeb, 0xa5, 0xfb, 0xc9, 0xdd, 0x2d, 0xeb, 0xfc, 0x9a, 0x71, 0xcd, 0x68, 0x6e, 0xc0, 0x35, 0x64, 0x62, 0x1b, 0x95, 0x12, 0xe8, 0x53, 0xec, 0xf0, 0xf4, 0x86, 0x86, 0x78, 0x18, 0xc4, 0xc6, 0xbc, 0x5a, 0x59, 0x8f, 0x7c, 0x7e, + /* (2^ 41)P */ 0x7f, 0xd7, 0x1e, 0xc5, 0x83, 0xdc, 0x1f, 0xbe, 0x0b, 0xcf, 0x2e, 0x01, 0x01, 0xed, 0xac, 0x17, 0x3b, 0xed, 0xa4, 0x30, 0x96, 0x0e, 0x14, 0x7e, 0x19, 0x2b, 0xa5, 0x67, 0x1e, 0xb3, 0x34, 0x03, 0xa8, 0xbb, 0x0a, 0x7d, 0x08, 0x2d, 0xd5, 0x53, 0x19, 0x6f, 0x13, 0xd5, 0xc0, 0x90, 0x8a, 0xcc, 0xc9, 0x5c, 0xab, 0x24, 0xd7, 0x03, 0xf6, 0x57, + /* (2^ 42)P */ 0x49, 0xcb, 0xb4, 0x96, 0x5f, 0xa6, 0xf8, 0x71, 0x6f, 0x59, 0xad, 0x05, 0x24, 0x2d, 0xaf, 0x67, 0xa8, 0xbe, 0x95, 0xdf, 0x0d, 0x28, 0x5a, 0x7f, 0x6e, 0x87, 0x8c, 0x6e, 0x67, 0x0c, 0xf4, 0xe0, 0x1c, 0x30, 0xc2, 0x66, 0xae, 0x20, 0xa1, 0x34, 0xec, 0x9c, 0xbc, 0xae, 0x3d, 0xa1, 0x28, 0x28, 0x95, 0x1d, 0xc9, 0x3a, 0xa8, 0xfd, 0xfc, 0xa1, + /* (2^ 43)P */ 0xe2, 0x2b, 0x9d, 0xed, 0x02, 0x99, 0x67, 0xbb, 0x2e, 0x16, 0x62, 0x05, 0x70, 0xc7, 0x27, 0xb9, 0x1c, 0x3f, 0xf2, 0x11, 0x01, 0xd8, 0x51, 0xa4, 0x18, 0x92, 0xa9, 0x5d, 0xfb, 0xa9, 0xe4, 0x42, 0xba, 0x38, 0x34, 0x1a, 0x4a, 0xc5, 0x6a, 0x37, 0xde, 0xa7, 0x0c, 0xb4, 0x7e, 0x7f, 0xde, 0xa6, 0xee, 0xcd, 0x55, 0x57, 0x05, 0x06, 0xfd, 0x5d, + /* (2^ 44)P */ 0x2f, 0x32, 0xcf, 0x2e, 0x2c, 0x7b, 0xbe, 0x9a, 0x0c, 0x57, 0x35, 0xf8, 0x87, 0xda, 0x9c, 0xec, 0x48, 0xf2, 0xbb, 0xe2, 0xda, 0x10, 0x58, 0x20, 0xc6, 0xd3, 0x87, 0xe9, 0xc7, 0x26, 0xd1, 0x9a, 0x46, 0x87, 0x90, 0xda, 0xdc, 0xde, 0xc3, 0xb3, 0xf2, 0xe8, 0x6f, 0x4a, 0xe6, 0xe8, 0x9d, 0x98, 0x36, 0x20, 0x03, 0x47, 0x15, 0x3f, 0x64, 0x59, + /* (2^ 45)P */ 0xd4, 0x71, 0x49, 0x0a, 0x67, 0x97, 0xaa, 0x3f, 0xf4, 0x1b, 0x3a, 0x6e, 0x5e, 0x17, 0xcc, 0x0a, 0x8f, 0x81, 0x6a, 0x41, 0x38, 0x77, 0x40, 0x8a, 0x11, 0x42, 0x62, 0xd2, 0x50, 0x32, 0x79, 0x78, 0x28, 0xc2, 0x2e, 0x10, 0x01, 0x94, 0x30, 0x4f, 0x7f, 0x18, 0x17, 0x56, 0x85, 0x4e, 0xad, 0xf7, 0xcb, 0x87, 0x3c, 0x3f, 0x50, 0x2c, 0xc0, 0xba, + /* (2^ 46)P */ 0xbc, 0x30, 0x8e, 0x65, 0x8e, 0x57, 0x5b, 0x38, 0x7a, 0xd4, 0x95, 0x52, 0x7a, 0x32, 0x59, 0x69, 0xcd, 0x9d, 0x47, 0x34, 0x5b, 0x55, 0xa5, 0x24, 0x60, 0xdd, 0xc0, 0xc1, 0x62, 0x73, 0x44, 0xae, 0x4c, 0x9c, 0x65, 0x55, 0x1b, 0x9d, 0x8a, 0x29, 0xb0, 0x1a, 0x52, 0xa8, 0xf1, 0xe6, 0x9a, 0xb3, 0xf6, 0xa3, 0xc9, 0x0a, 0x70, 0x7d, 0x0f, 0xee, + /* (2^ 47)P */ 0x77, 0xd3, 0xe5, 0x8e, 0xfa, 0x00, 0xeb, 0x1b, 0x7f, 0xdc, 0x68, 0x3f, 0x92, 0xbd, 0xb7, 0x0b, 0xb7, 0xb5, 0x24, 0xdf, 0xc5, 0x67, 0x53, 0xd4, 0x36, 0x79, 0xc4, 0x7b, 0x57, 0xbc, 0x99, 0x97, 0x60, 0xef, 0xe4, 0x01, 0xa1, 0xa7, 0xaa, 0x12, 0x36, 0x29, 0xb1, 0x03, 0xc2, 0x83, 0x1c, 0x2b, 0x83, 0xef, 0x2e, 0x2c, 0x23, 0x92, 0xfd, 0xd1, + /* (2^ 48)P */ 0x94, 0xef, 0x03, 0x59, 0xfa, 0x8a, 0x18, 0x76, 0xee, 0x58, 0x08, 0x4d, 0x44, 0xce, 0xf1, 0x52, 0x33, 0x49, 0xf6, 0x69, 0x71, 0xe3, 0xa9, 0xbc, 0x86, 0xe3, 0x43, 0xde, 0x33, 0x7b, 0x90, 0x8b, 0x3e, 0x7d, 0xd5, 0x4a, 0xf0, 0x23, 0x99, 0xa6, 0xea, 0x5f, 0x08, 0xe5, 0xb9, 0x49, 0x8b, 0x0d, 0x6a, 0x21, 0xab, 0x07, 0x62, 0xcd, 0xc4, 0xbe, + /* (2^ 49)P */ 0x61, 0xbf, 0x70, 0x14, 0xfa, 0x4e, 0x9e, 0x7c, 0x0c, 0xf8, 0xb2, 0x48, 0x71, 0x62, 0x83, 0xd6, 0xd1, 0xdc, 0x9c, 0x29, 0x66, 0xb1, 0x34, 0x9c, 0x8d, 0xe6, 0x88, 0xaf, 0xbe, 0xdc, 0x4d, 0xeb, 0xb0, 0xe7, 0x28, 0xae, 0xb2, 0x05, 0x56, 0xc6, 0x0e, 0x10, 0x26, 0xab, 0x2c, 0x59, 0x72, 0x03, 0x66, 0xfe, 0x8f, 0x2c, 0x51, 0x2d, 0xdc, 0xae, + /* (2^ 50)P */ 0xdc, 0x63, 0xf1, 0x8b, 0x5c, 0x65, 0x0b, 0xf1, 0xa6, 0x22, 0xe2, 0xd9, 0xdb, 0x49, 0xb1, 0x3c, 0x47, 0xc2, 0xfe, 0xac, 0x86, 0x07, 0x52, 0xec, 0xb0, 0x08, 0x69, 0xfb, 0xd1, 0x06, 0xdc, 0x48, 0x5c, 0x3d, 0xb2, 0x4d, 0xb8, 0x1a, 0x4e, 0xda, 0xb9, 0xc1, 0x2b, 0xab, 0x4b, 0x62, 0x81, 0x21, 0x9a, 0xfc, 0x3d, 0x39, 0x83, 0x11, 0x36, 0xeb, + /* (2^ 51)P */ 0x94, 0xf3, 0x17, 0xef, 0xf9, 0x60, 0x54, 0xc3, 0xd7, 0x27, 0x35, 0xc5, 0x98, 0x5e, 0xf6, 0x63, 0x6c, 0xa0, 0x4a, 0xd3, 0xa3, 0x98, 0xd9, 0x42, 0xe3, 0xf1, 0xf8, 0x81, 0x96, 0xa9, 0xea, 0x6d, 0x4b, 0x8e, 0x33, 0xca, 0x94, 0x0d, 0xa0, 0xf7, 0xbb, 0x64, 0xa3, 0x36, 0x6f, 0xdc, 0x5a, 0x94, 0x42, 0xca, 0x06, 0xb2, 0x2b, 0x9a, 0x9f, 0x71, + /* (2^ 52)P */ 0xec, 0xdb, 0xa6, 0x1f, 0xdf, 0x15, 0x36, 0xa3, 0xda, 0x8a, 0x7a, 0xb6, 0xa7, 0xe3, 0xaf, 0x52, 0xe0, 0x8d, 0xe8, 0xf2, 0x44, 0x20, 0xeb, 0xa1, 0x20, 0xc4, 0x65, 0x3c, 0x7c, 0x6c, 0x49, 0xed, 0x2f, 0x66, 0x23, 0x68, 0x61, 0x91, 0x40, 0x9f, 0x50, 0x19, 0xd1, 0x84, 0xa7, 0xe2, 0xed, 0x34, 0x37, 0xe3, 0xe4, 0x11, 0x7f, 0x87, 0x55, 0x0f, + /* (2^ 53)P */ 0xb3, 0xa1, 0x0f, 0xb0, 0x48, 0xc0, 0x4d, 0x96, 0xa7, 0xcf, 0x5a, 0x81, 0xb8, 0x4a, 0x46, 0xef, 0x0a, 0xd3, 0x40, 0x7e, 0x02, 0xe3, 0x63, 0xaa, 0x50, 0xd1, 0x2a, 0x37, 0x22, 0x4a, 0x7f, 0x4f, 0xb6, 0xf9, 0x01, 0x82, 0x78, 0x3d, 0x93, 0x14, 0x11, 0x8a, 0x90, 0x60, 0xcd, 0x45, 0x4e, 0x7b, 0x42, 0xb9, 0x3e, 0x6e, 0x68, 0x1f, 0x36, 0x41, + /* (2^ 54)P */ 0x13, 0x73, 0x0e, 0x4f, 0x79, 0x93, 0x9e, 0x29, 0x70, 0x7b, 0x4a, 0x59, 0x1a, 0x9a, 0xf4, 0x55, 0x08, 0xf0, 0xdb, 0x17, 0x58, 0xec, 0x64, 0xad, 0x7f, 0x29, 0xeb, 0x3f, 0x85, 0x4e, 0x60, 0x28, 0x98, 0x1f, 0x73, 0x4e, 0xe6, 0xa8, 0xab, 0xd5, 0xd6, 0xfc, 0xa1, 0x36, 0x6d, 0x15, 0xc6, 0x13, 0x83, 0xa0, 0xc2, 0x6e, 0xd9, 0xdb, 0xc9, 0xcc, + /* (2^ 55)P */ 0xff, 0xd8, 0x52, 0xa3, 0xdc, 0x99, 0xcf, 0x3e, 0x19, 0xb3, 0x68, 0xd0, 0xb5, 0x0d, 0xb8, 0xee, 0x3f, 0xef, 0x6e, 0xc0, 0x38, 0x28, 0x44, 0x92, 0x78, 0x91, 0x1a, 0x08, 0x78, 0x6c, 0x65, 0x24, 0xf3, 0xa2, 0x3d, 0xf2, 0xe5, 0x79, 0x62, 0x69, 0x29, 0xf4, 0x22, 0xc5, 0xdb, 0x6a, 0xae, 0xf4, 0x44, 0xa3, 0x6f, 0xc7, 0x86, 0xab, 0xef, 0xef, + /* (2^ 56)P */ 0xbf, 0x54, 0x9a, 0x09, 0x5d, 0x17, 0xd0, 0xde, 0xfb, 0xf5, 0xca, 0xff, 0x13, 0x20, 0x88, 0x82, 0x3a, 0xe2, 0xd0, 0x3b, 0xfb, 0x05, 0x76, 0xd1, 0xc0, 0x02, 0x71, 0x3b, 0x94, 0xe8, 0xc9, 0x84, 0xcf, 0xa4, 0xe9, 0x28, 0x7b, 0xf5, 0x09, 0xc3, 0x2b, 0x22, 0x40, 0xf1, 0x68, 0x24, 0x24, 0x7d, 0x9f, 0x6e, 0xcd, 0xfe, 0xb0, 0x19, 0x61, 0xf5, + /* (2^ 57)P */ 0xe8, 0x63, 0x51, 0xb3, 0x95, 0x6b, 0x7b, 0x74, 0x92, 0x52, 0x45, 0xa4, 0xed, 0xea, 0x0e, 0x0d, 0x2b, 0x01, 0x1e, 0x2c, 0xbc, 0x91, 0x06, 0x69, 0xdb, 0x1f, 0xb5, 0x77, 0x1d, 0x56, 0xf5, 0xb4, 0x02, 0x80, 0x49, 0x56, 0x12, 0xce, 0x86, 0x05, 0xc9, 0xd9, 0xae, 0xf3, 0x6d, 0xe6, 0x3f, 0x40, 0x52, 0xe9, 0x49, 0x2b, 0x31, 0x06, 0x86, 0x14, + /* (2^ 58)P */ 0xf5, 0x09, 0x3b, 0xd2, 0xff, 0xdf, 0x11, 0xa5, 0x1c, 0x99, 0xe8, 0x1b, 0xa4, 0x2c, 0x7d, 0x8e, 0xc8, 0xf7, 0x03, 0x46, 0xfa, 0xb6, 0xde, 0x73, 0x91, 0x7e, 0x5a, 0x7a, 0xd7, 0x9a, 0x5b, 0x80, 0x24, 0x62, 0x5e, 0x92, 0xf1, 0xa3, 0x45, 0xa3, 0x43, 0x92, 0x8a, 0x2a, 0x5b, 0x0c, 0xb4, 0xc8, 0xad, 0x1c, 0xb6, 0x6c, 0x5e, 0x81, 0x18, 0x91, + /* (2^ 59)P */ 0x96, 0xb3, 0xca, 0x2b, 0xe3, 0x7a, 0x59, 0x72, 0x17, 0x74, 0x29, 0x21, 0xe7, 0x78, 0x07, 0xad, 0xda, 0xb6, 0xcd, 0xf9, 0x27, 0x4d, 0xc8, 0xf2, 0x98, 0x22, 0xca, 0xf2, 0x33, 0x74, 0x7a, 0xdd, 0x1e, 0x71, 0xec, 0xe3, 0x3f, 0xe2, 0xa2, 0xd2, 0x38, 0x75, 0xb0, 0xd0, 0x0a, 0xcf, 0x7d, 0x36, 0xdc, 0x49, 0x38, 0x25, 0x34, 0x4f, 0x20, 0x9a, + /* (2^ 60)P */ 0x2b, 0x6e, 0x04, 0x0d, 0x4f, 0x3d, 0x3b, 0x24, 0xf6, 0x4e, 0x5e, 0x0a, 0xbd, 0x48, 0x96, 0xba, 0x81, 0x8f, 0x39, 0x82, 0x13, 0xe6, 0x72, 0xf3, 0x0f, 0xb6, 0x94, 0xf4, 0xc5, 0x90, 0x74, 0x91, 0xa8, 0xf2, 0xc9, 0xca, 0x9a, 0x4d, 0x98, 0xf2, 0xdf, 0x52, 0x4e, 0x97, 0x2f, 0xeb, 0x84, 0xd3, 0xaf, 0xc2, 0xcc, 0xfb, 0x4c, 0x26, 0x4b, 0xe4, + /* (2^ 61)P */ 0x12, 0x9e, 0xfb, 0x9d, 0x78, 0x79, 0x99, 0xdd, 0xb3, 0x0b, 0x2e, 0x56, 0x41, 0x8e, 0x3f, 0x39, 0xb8, 0x97, 0x89, 0x53, 0x9b, 0x8a, 0x3c, 0x40, 0x9d, 0xa4, 0x6c, 0x2e, 0x31, 0x71, 0xc6, 0x0a, 0x41, 0xd4, 0x95, 0x06, 0x5e, 0xc1, 0xab, 0xc2, 0x14, 0xc4, 0xc7, 0x15, 0x08, 0x3a, 0xad, 0x7a, 0xb4, 0x62, 0xa3, 0x0c, 0x90, 0xf4, 0x47, 0x08, + /* (2^ 62)P */ 0x7f, 0xec, 0x09, 0x82, 0xf5, 0x94, 0x09, 0x93, 0x32, 0xd3, 0xdc, 0x56, 0x80, 0x7b, 0x5b, 0x22, 0x80, 0x6a, 0x96, 0x72, 0xb1, 0xc2, 0xd9, 0xa1, 0x8b, 0x66, 0x42, 0x16, 0xe2, 0x07, 0xb3, 0x2d, 0xf1, 0x75, 0x35, 0x72, 0xc7, 0x98, 0xbe, 0x63, 0x3b, 0x20, 0x75, 0x05, 0xc1, 0x3e, 0x31, 0x5a, 0xf7, 0xaa, 0xae, 0x4b, 0xdb, 0x1d, 0xd0, 0x74, + /* (2^ 63)P */ 0x36, 0x5c, 0x74, 0xe6, 0x5d, 0x59, 0x3f, 0x15, 0x4b, 0x4d, 0x4e, 0x67, 0x41, 0xfe, 0x98, 0x1f, 0x49, 0x76, 0x91, 0x0f, 0x9b, 0xf4, 0xaf, 0x86, 0xaf, 0x66, 0x19, 0xed, 0x46, 0xf1, 0x05, 0x9a, 0xcc, 0xd1, 0x14, 0x1f, 0x82, 0x12, 0x8e, 0xe6, 0xf4, 0xc3, 0x42, 0x5c, 0x4e, 0x33, 0x93, 0xbe, 0x30, 0xe7, 0x64, 0xa9, 0x35, 0x00, 0x4d, 0xf9, + /* (2^ 64)P */ 0x1f, 0xc1, 0x1e, 0xb7, 0xe3, 0x7c, 0xfa, 0xa3, 0x6b, 0x76, 0xaf, 0x9c, 0x05, 0x85, 0x4a, 0xa9, 0xfb, 0xe3, 0x7e, 0xf2, 0x49, 0x56, 0xdc, 0x2f, 0x57, 0x10, 0xba, 0x37, 0xb2, 0x62, 0xf5, 0x6b, 0xe5, 0x8f, 0x0a, 0x87, 0xd1, 0x6a, 0xcb, 0x9d, 0x07, 0xd0, 0xf6, 0x38, 0x99, 0x2c, 0x61, 0x4a, 0x4e, 0xd8, 0xd2, 0x88, 0x29, 0x99, 0x11, 0x95, + /* (2^ 65)P */ 0x6f, 0xdc, 0xd5, 0xd6, 0xd6, 0xa7, 0x4c, 0x46, 0x93, 0x65, 0x62, 0x23, 0x95, 0x32, 0x9c, 0xde, 0x40, 0x41, 0x68, 0x2c, 0x18, 0x4e, 0x5a, 0x8c, 0xc0, 0xc5, 0xc5, 0xea, 0x5c, 0x45, 0x0f, 0x60, 0x78, 0x39, 0xb6, 0x36, 0x23, 0x12, 0xbc, 0x21, 0x9a, 0xf8, 0x91, 0xac, 0xc4, 0x70, 0xdf, 0x85, 0x8e, 0x3c, 0xec, 0x22, 0x04, 0x98, 0xa8, 0xaa, + /* (2^ 66)P */ 0xcc, 0x52, 0x10, 0x5b, 0x4b, 0x6c, 0xc5, 0xfa, 0x3e, 0xd4, 0xf8, 0x1c, 0x04, 0x14, 0x48, 0x33, 0xd9, 0xfc, 0x5f, 0xb0, 0xa5, 0x48, 0x8c, 0x45, 0x8a, 0xee, 0x3e, 0xa7, 0xc1, 0x2e, 0x34, 0xca, 0xf6, 0xc9, 0xeb, 0x10, 0xbb, 0xe1, 0x59, 0x84, 0x25, 0xe8, 0x81, 0x70, 0xc0, 0x09, 0x42, 0xa7, 0x3b, 0x0d, 0x33, 0x00, 0xb5, 0x77, 0xbe, 0x25, + /* (2^ 67)P */ 0xcd, 0x1f, 0xbc, 0x7d, 0xef, 0xe5, 0xca, 0x91, 0xaf, 0xa9, 0x59, 0x6a, 0x09, 0xca, 0xd6, 0x1b, 0x3d, 0x55, 0xde, 0xa2, 0x6a, 0x80, 0xd6, 0x95, 0x47, 0xe4, 0x5f, 0x68, 0x54, 0x08, 0xdf, 0x29, 0xba, 0x2a, 0x02, 0x84, 0xe8, 0xe9, 0x00, 0x77, 0x99, 0x36, 0x03, 0xf6, 0x4a, 0x3e, 0x21, 0x81, 0x7d, 0xb8, 0xa4, 0x8a, 0xa2, 0x05, 0xef, 0xbc, + /* (2^ 68)P */ 0x7c, 0x59, 0x5f, 0x66, 0xd9, 0xb7, 0x83, 0x43, 0x8a, 0xa1, 0x8d, 0x51, 0x70, 0xba, 0xf2, 0x9b, 0x95, 0xc0, 0x4b, 0x4c, 0xa0, 0x14, 0xd3, 0xa4, 0x5d, 0x4a, 0x37, 0x36, 0x97, 0x31, 0x1e, 0x12, 0xe7, 0xbb, 0x08, 0x67, 0xa5, 0x23, 0xd7, 0xfb, 0x97, 0xd8, 0x6a, 0x03, 0xb1, 0xf8, 0x7f, 0xda, 0x58, 0xd9, 0x3f, 0x73, 0x4a, 0x53, 0xe1, 0x7b, + /* (2^ 69)P */ 0x55, 0x83, 0x98, 0x78, 0x6c, 0x56, 0x5e, 0xed, 0xf7, 0x23, 0x3e, 0x4c, 0x7d, 0x09, 0x2d, 0x09, 0x9c, 0x58, 0x8b, 0x32, 0xca, 0xfe, 0xbf, 0x47, 0x03, 0xeb, 0x4d, 0xe7, 0xeb, 0x9c, 0x83, 0x05, 0x68, 0xaa, 0x80, 0x89, 0x44, 0xf9, 0xd4, 0xdc, 0xdb, 0xb1, 0xdb, 0x77, 0xac, 0xf9, 0x2a, 0xae, 0x35, 0xac, 0x74, 0xb5, 0x95, 0x62, 0x18, 0x85, + /* (2^ 70)P */ 0xab, 0x82, 0x7e, 0x10, 0xd7, 0xe6, 0x57, 0xd1, 0x66, 0x12, 0x31, 0x9c, 0x9c, 0xa6, 0x27, 0x59, 0x71, 0x2e, 0xeb, 0xa0, 0x68, 0xc5, 0x87, 0x51, 0xf4, 0xca, 0x3f, 0x98, 0x56, 0xb0, 0x89, 0xb1, 0xc7, 0x7b, 0x46, 0xb3, 0xae, 0x36, 0xf2, 0xee, 0x15, 0x1a, 0x60, 0xf4, 0x50, 0x76, 0x4f, 0xc4, 0x53, 0x0d, 0x36, 0x4d, 0x31, 0xb1, 0x20, 0x51, + /* (2^ 71)P */ 0xf7, 0x1d, 0x8c, 0x1b, 0x5e, 0xe5, 0x02, 0x6f, 0xc5, 0xa5, 0xe0, 0x5f, 0xc6, 0xb6, 0x63, 0x43, 0xaf, 0x3c, 0x19, 0x6c, 0xf4, 0xaf, 0xa4, 0x33, 0xb1, 0x0a, 0x37, 0x3d, 0xd9, 0x4d, 0xe2, 0x29, 0x24, 0x26, 0x94, 0x7c, 0x02, 0xe4, 0xe2, 0xf2, 0xbe, 0xbd, 0xac, 0x1b, 0x48, 0xb8, 0xdd, 0xe9, 0x0d, 0x9a, 0x50, 0x1a, 0x98, 0x71, 0x6e, 0xdc, + /* (2^ 72)P */ 0x9f, 0x40, 0xb1, 0xb3, 0x66, 0x28, 0x6c, 0xfe, 0xa6, 0x7d, 0xf8, 0x3e, 0xb8, 0xf3, 0xde, 0x52, 0x76, 0x52, 0xa3, 0x92, 0x98, 0x23, 0xab, 0x4f, 0x88, 0x97, 0xfc, 0x22, 0xe1, 0x6b, 0x67, 0xcd, 0x13, 0x95, 0xda, 0x65, 0xdd, 0x3b, 0x67, 0x3f, 0x5f, 0x4c, 0xf2, 0x8a, 0xad, 0x98, 0xa7, 0x94, 0x24, 0x45, 0x87, 0x11, 0x7c, 0x75, 0x79, 0x85, + /* (2^ 73)P */ 0x70, 0xbf, 0xf9, 0x3b, 0xa9, 0x44, 0x57, 0x72, 0x96, 0xc9, 0xa4, 0x98, 0x65, 0xbf, 0x87, 0xb3, 0x3a, 0x39, 0x12, 0xde, 0xe5, 0x39, 0x01, 0x4f, 0xf7, 0xc0, 0x71, 0x52, 0x36, 0x85, 0xb3, 0x18, 0xf8, 0x14, 0xc0, 0x6d, 0xae, 0x9e, 0x4f, 0xb0, 0x72, 0x87, 0xac, 0x5c, 0xd1, 0x6c, 0x41, 0x6c, 0x90, 0x9d, 0x22, 0x81, 0xe4, 0x2b, 0xea, 0xe5, + /* (2^ 74)P */ 0xfc, 0xea, 0x1a, 0x65, 0xd9, 0x49, 0x6a, 0x39, 0xb5, 0x96, 0x72, 0x7b, 0x32, 0xf1, 0xd0, 0xe9, 0x45, 0xd9, 0x31, 0x55, 0xc7, 0x34, 0xe9, 0x5a, 0xec, 0x73, 0x0b, 0x03, 0xc4, 0xb3, 0xe6, 0xc9, 0x5e, 0x0a, 0x17, 0xfe, 0x53, 0x66, 0x7f, 0x21, 0x18, 0x74, 0x54, 0x1b, 0xc9, 0x49, 0x16, 0xd2, 0x48, 0xaf, 0x5b, 0x47, 0x7b, 0xeb, 0xaa, 0xc9, + /* (2^ 75)P */ 0x47, 0x04, 0xf5, 0x5a, 0x87, 0x77, 0x9e, 0x21, 0x34, 0x4e, 0x83, 0x88, 0xaf, 0x02, 0x1d, 0xb0, 0x5a, 0x1d, 0x1d, 0x7d, 0x8d, 0x2c, 0xd3, 0x8d, 0x63, 0xa9, 0x45, 0xfb, 0x15, 0x6d, 0x86, 0x45, 0xcd, 0x38, 0x0e, 0xf7, 0x37, 0x79, 0xed, 0x6d, 0x5a, 0xbc, 0x32, 0xcc, 0x66, 0xf1, 0x3a, 0xb2, 0x87, 0x6f, 0x70, 0x71, 0xd9, 0xf2, 0xfa, 0x7b, + /* (2^ 76)P */ 0x68, 0x07, 0xdc, 0x61, 0x40, 0xe4, 0xec, 0x32, 0xc8, 0xbe, 0x66, 0x30, 0x54, 0x80, 0xfd, 0x13, 0x7a, 0xef, 0xae, 0xed, 0x2e, 0x00, 0x6d, 0x3f, 0xbd, 0xfc, 0x91, 0x24, 0x53, 0x7f, 0x63, 0x9d, 0x2e, 0xe3, 0x76, 0xe0, 0xf3, 0xe1, 0x8f, 0x7a, 0xc4, 0x77, 0x0c, 0x91, 0xc0, 0xc2, 0x18, 0x6b, 0x04, 0xad, 0xb6, 0x70, 0x9a, 0x64, 0xc5, 0x82, + /* (2^ 77)P */ 0x7f, 0xea, 0x13, 0xd8, 0x9e, 0xfc, 0x5b, 0x06, 0xb5, 0x4f, 0xda, 0x38, 0xe0, 0x9c, 0xd2, 0x3a, 0xc1, 0x1c, 0x62, 0x70, 0x7f, 0xc6, 0x24, 0x0a, 0x47, 0x04, 0x01, 0xc4, 0x55, 0x09, 0xd1, 0x7a, 0x07, 0xba, 0xa3, 0x80, 0x4f, 0xc1, 0x65, 0x36, 0x6d, 0xc0, 0x10, 0xcf, 0x94, 0xa9, 0xa2, 0x01, 0x44, 0xd1, 0xf9, 0x1c, 0x4c, 0xfb, 0xf8, 0x99, + /* (2^ 78)P */ 0x6c, 0xb9, 0x6b, 0xee, 0x43, 0x5b, 0xb9, 0xbb, 0xee, 0x2e, 0x52, 0xc1, 0xc6, 0xb9, 0x61, 0xd2, 0x93, 0xa5, 0xaf, 0x52, 0xf4, 0xa4, 0x1a, 0x51, 0x61, 0xa7, 0xcb, 0x9e, 0xbb, 0x56, 0x65, 0xe2, 0xbf, 0x75, 0xb9, 0x9c, 0x50, 0x96, 0x60, 0x81, 0x74, 0x47, 0xc0, 0x04, 0x88, 0x71, 0x76, 0x39, 0x9a, 0xa7, 0xb1, 0x4e, 0x43, 0x15, 0xe0, 0xbb, + /* (2^ 79)P */ 0xbb, 0xce, 0xe2, 0xbb, 0xf9, 0x17, 0x0f, 0x82, 0x40, 0xad, 0x73, 0xe3, 0xeb, 0x3b, 0x06, 0x1a, 0xcf, 0x8e, 0x6e, 0x28, 0xb8, 0x26, 0xd9, 0x5b, 0xb7, 0xb3, 0xcf, 0xb4, 0x6a, 0x1c, 0xbf, 0x7f, 0xb8, 0xb5, 0x79, 0xcf, 0x45, 0x68, 0x7d, 0xc5, 0xeb, 0xf3, 0xbe, 0x39, 0x40, 0xfc, 0x07, 0x90, 0x7a, 0x62, 0xad, 0x86, 0x08, 0x71, 0x25, 0xe1, + /* (2^ 80)P */ 0x9b, 0x46, 0xac, 0xef, 0xc1, 0x4e, 0xa1, 0x97, 0x95, 0x76, 0xf9, 0x1b, 0xc2, 0xb2, 0x6a, 0x41, 0xea, 0x80, 0x3d, 0xe9, 0x08, 0x52, 0x5a, 0xe3, 0xf2, 0x08, 0xc5, 0xea, 0x39, 0x3f, 0x44, 0x71, 0x4d, 0xea, 0x0d, 0x05, 0x23, 0xe4, 0x2e, 0x3c, 0x89, 0xfe, 0x12, 0x8a, 0x95, 0x42, 0x0a, 0x68, 0xea, 0x5a, 0x28, 0x06, 0x9e, 0xe3, 0x5f, 0xe0, + /* (2^ 81)P */ 0x00, 0x61, 0x6c, 0x98, 0x9b, 0xe7, 0xb9, 0x06, 0x1c, 0xc5, 0x1b, 0xed, 0xbe, 0xc8, 0xb3, 0xea, 0x87, 0xf0, 0xc4, 0x24, 0x7d, 0xbb, 0x5d, 0xa4, 0x1d, 0x7a, 0x16, 0x00, 0x55, 0x94, 0x67, 0x78, 0xbd, 0x58, 0x02, 0x82, 0x90, 0x53, 0x76, 0xd4, 0x72, 0x99, 0x51, 0x6f, 0x7b, 0xcf, 0x80, 0x30, 0x31, 0x3b, 0x01, 0xc7, 0xc1, 0xef, 0xe6, 0x42, + /* (2^ 82)P */ 0xe2, 0x35, 0xaf, 0x4b, 0x79, 0xc6, 0x12, 0x24, 0x99, 0xc0, 0x68, 0xb0, 0x43, 0x3e, 0xe5, 0xef, 0xe2, 0x29, 0xea, 0xb8, 0xb3, 0xbc, 0x6a, 0x53, 0x2c, 0x69, 0x18, 0x5a, 0xf9, 0x15, 0xae, 0x66, 0x58, 0x18, 0xd3, 0x2d, 0x4b, 0x00, 0xfd, 0x84, 0xab, 0x4f, 0xae, 0x70, 0x6b, 0x9e, 0x9a, 0xdf, 0x83, 0xfd, 0x2e, 0x3c, 0xcf, 0xf8, 0x88, 0x5b, + /* (2^ 83)P */ 0xa4, 0x90, 0x31, 0x85, 0x13, 0xcd, 0xdf, 0x64, 0xc9, 0xa1, 0x0b, 0xe7, 0xb6, 0x73, 0x8a, 0x1b, 0x22, 0x78, 0x4c, 0xd4, 0xae, 0x48, 0x18, 0x00, 0x00, 0xa8, 0x9f, 0x06, 0xf9, 0xfb, 0x2d, 0xc3, 0xb1, 0x2a, 0xbc, 0x13, 0x99, 0x57, 0xaf, 0xf0, 0x8d, 0x61, 0x54, 0x29, 0xd5, 0xf2, 0x72, 0x00, 0x96, 0xd1, 0x85, 0x12, 0x8a, 0xf0, 0x23, 0xfb, + /* (2^ 84)P */ 0x69, 0xc7, 0xdb, 0xd9, 0x92, 0x75, 0x08, 0x9b, 0xeb, 0xa5, 0x93, 0xd1, 0x1a, 0xf4, 0xf5, 0xaf, 0xe6, 0xc4, 0x4a, 0x0d, 0x35, 0x26, 0x39, 0x9d, 0xd3, 0x17, 0x3e, 0xae, 0x2d, 0xbf, 0x73, 0x9f, 0xb7, 0x74, 0x91, 0xd1, 0xd8, 0x5c, 0x14, 0xf9, 0x75, 0xdf, 0xeb, 0xc2, 0x22, 0xd8, 0x14, 0x8d, 0x86, 0x23, 0x4d, 0xd1, 0x2d, 0xdb, 0x6b, 0x42, + /* (2^ 85)P */ 0x8c, 0xda, 0xc6, 0xf8, 0x71, 0xba, 0x2b, 0x06, 0x78, 0xae, 0xcc, 0x3a, 0xe3, 0xe3, 0xa1, 0x8b, 0xe2, 0x34, 0x6d, 0x28, 0x9e, 0x46, 0x13, 0x4d, 0x9e, 0xa6, 0x73, 0x49, 0x65, 0x79, 0x88, 0xb9, 0x3a, 0xd1, 0x6d, 0x2f, 0x48, 0x2b, 0x0a, 0x7f, 0x58, 0x20, 0x37, 0xf4, 0x0e, 0xbb, 0x4a, 0x95, 0x58, 0x0c, 0x88, 0x30, 0xc4, 0x74, 0xdd, 0xfd, + /* (2^ 86)P */ 0x6d, 0x13, 0x4e, 0x89, 0x2d, 0xa9, 0xa3, 0xed, 0x09, 0xe3, 0x0e, 0x71, 0x3e, 0x4a, 0xab, 0x90, 0xde, 0x03, 0xeb, 0x56, 0x46, 0x60, 0x06, 0xf5, 0x71, 0xe5, 0xee, 0x9b, 0xef, 0xff, 0xc4, 0x2c, 0x9f, 0x37, 0x48, 0x45, 0x94, 0x12, 0x41, 0x81, 0x15, 0x70, 0x91, 0x99, 0x5e, 0x56, 0x6b, 0xf4, 0xa6, 0xc9, 0xf5, 0x69, 0x9d, 0x78, 0x37, 0x57, + /* (2^ 87)P */ 0xf3, 0x51, 0x57, 0x7e, 0x43, 0x6f, 0xc6, 0x67, 0x59, 0x0c, 0xcf, 0x94, 0xe6, 0x3d, 0xb5, 0x07, 0xc9, 0x77, 0x48, 0xc9, 0x68, 0x0d, 0x98, 0x36, 0x62, 0x35, 0x38, 0x1c, 0xf5, 0xc5, 0xec, 0x66, 0x78, 0xfe, 0x47, 0xab, 0x26, 0xd6, 0x44, 0xb6, 0x06, 0x0f, 0x89, 0xe3, 0x19, 0x40, 0x1a, 0xe7, 0xd8, 0x65, 0x55, 0xf7, 0x1a, 0xfc, 0xa3, 0x0e, + /* (2^ 88)P */ 0x0e, 0x30, 0xa6, 0xb7, 0x58, 0x60, 0x62, 0x2a, 0x6c, 0x13, 0xa8, 0x14, 0x9b, 0xb8, 0xf2, 0x70, 0xd8, 0xb1, 0x71, 0x88, 0x8c, 0x18, 0x31, 0x25, 0x93, 0x90, 0xb4, 0xc7, 0x49, 0xd8, 0xd4, 0xdb, 0x1e, 0x1e, 0x7f, 0xaa, 0xba, 0xc9, 0xf2, 0x5d, 0xa9, 0x3a, 0x43, 0xb4, 0x5c, 0xee, 0x7b, 0xc7, 0x97, 0xb7, 0x66, 0xd7, 0x23, 0xd9, 0x22, 0x59, + /* (2^ 89)P */ 0x28, 0x19, 0xa6, 0xf9, 0x89, 0x20, 0x78, 0xd4, 0x6d, 0xcb, 0x79, 0x8f, 0x61, 0x6f, 0xb2, 0x5c, 0x4f, 0xa6, 0x54, 0x84, 0x95, 0x24, 0x36, 0x64, 0xcb, 0x39, 0xe7, 0x8f, 0x97, 0x9c, 0x5c, 0x3c, 0xfb, 0x51, 0x11, 0x01, 0x17, 0xdb, 0xc9, 0x9b, 0x51, 0x03, 0x9a, 0xe9, 0xe5, 0x24, 0x1e, 0xf5, 0xda, 0xe0, 0x48, 0x02, 0x23, 0xd0, 0x2c, 0x81, + /* (2^ 90)P */ 0x42, 0x1b, 0xe4, 0x91, 0x85, 0x2a, 0x0c, 0xd2, 0x28, 0x66, 0x57, 0x9e, 0x33, 0x8d, 0x25, 0x71, 0x10, 0x65, 0x76, 0xa2, 0x8c, 0x21, 0x86, 0x81, 0x15, 0xc2, 0x27, 0xeb, 0x54, 0x2d, 0x4f, 0x6c, 0xe6, 0xd6, 0x24, 0x9c, 0x1a, 0x12, 0xb8, 0x81, 0xe2, 0x0a, 0xf3, 0xd3, 0xf0, 0xd3, 0xe1, 0x74, 0x1f, 0x9b, 0x11, 0x47, 0xd0, 0xcf, 0xb6, 0x54, + /* (2^ 91)P */ 0x26, 0x45, 0xa2, 0x10, 0xd4, 0x2d, 0xae, 0xc0, 0xb0, 0xe8, 0x86, 0xb3, 0xc7, 0xea, 0x70, 0x87, 0x61, 0xb5, 0xa5, 0x55, 0xbe, 0x88, 0x1d, 0x7a, 0xd9, 0x6f, 0xeb, 0x83, 0xe2, 0x44, 0x7f, 0x98, 0x04, 0xd6, 0x50, 0x9d, 0xa7, 0x86, 0x66, 0x09, 0x63, 0xe1, 0xed, 0x72, 0xb1, 0xe4, 0x1d, 0x3a, 0xfd, 0x47, 0xce, 0x1c, 0xaa, 0x3b, 0x8f, 0x1b, + /* (2^ 92)P */ 0xf4, 0x3c, 0x4a, 0xb6, 0xc2, 0x9c, 0xe0, 0x2e, 0xb7, 0x38, 0xea, 0x61, 0x35, 0x97, 0x10, 0x90, 0xae, 0x22, 0x48, 0xb3, 0xa9, 0xc6, 0x7a, 0xbb, 0x23, 0xf2, 0xf8, 0x1b, 0xa7, 0xa1, 0x79, 0xcc, 0xc4, 0xf8, 0x08, 0x76, 0x8a, 0x5a, 0x1c, 0x1b, 0xc5, 0x33, 0x91, 0xa9, 0xb8, 0xb9, 0xd3, 0xf8, 0x49, 0xcd, 0xe5, 0x82, 0x43, 0xf7, 0xca, 0x68, + /* (2^ 93)P */ 0x38, 0xba, 0xae, 0x44, 0xfe, 0x57, 0x64, 0x56, 0x7c, 0x0e, 0x9c, 0xca, 0xff, 0xa9, 0x82, 0xbb, 0x38, 0x4a, 0xa7, 0xf7, 0x47, 0xab, 0xbe, 0x6d, 0x23, 0x0b, 0x8a, 0xed, 0xc2, 0xb9, 0x8f, 0xf1, 0xec, 0x91, 0x44, 0x73, 0x64, 0xba, 0xd5, 0x8f, 0x37, 0x38, 0x0d, 0xd5, 0xf8, 0x73, 0x57, 0xb6, 0xc2, 0x45, 0xdc, 0x25, 0xb2, 0xb6, 0xea, 0xd9, + /* (2^ 94)P */ 0xbf, 0xe9, 0x1a, 0x40, 0x4d, 0xcc, 0xe6, 0x1d, 0x70, 0x1a, 0x65, 0xcc, 0x34, 0x2c, 0x37, 0x2c, 0x2d, 0x6b, 0x6d, 0xe5, 0x2f, 0x19, 0x9e, 0xe4, 0xe1, 0xaa, 0xd4, 0xab, 0x54, 0xf4, 0xa8, 0xe4, 0x69, 0x2d, 0x8e, 0x4d, 0xd7, 0xac, 0xb0, 0x5b, 0xfe, 0xe3, 0x26, 0x07, 0xc3, 0xf8, 0x1b, 0x43, 0xa8, 0x1d, 0x64, 0xa5, 0x25, 0x88, 0xbb, 0x77, + /* (2^ 95)P */ 0x92, 0xcd, 0x6e, 0xa0, 0x79, 0x04, 0x18, 0xf4, 0x11, 0x58, 0x48, 0xb5, 0x3c, 0x7b, 0xd1, 0xcc, 0xd3, 0x14, 0x2c, 0xa0, 0xdd, 0x04, 0x44, 0x11, 0xb3, 0x6d, 0x2f, 0x0d, 0xf5, 0x2a, 0x75, 0x5d, 0x1d, 0xda, 0x86, 0x8d, 0x7d, 0x6b, 0x32, 0x68, 0xb6, 0x6c, 0x64, 0x9e, 0xde, 0x80, 0x88, 0xce, 0x08, 0xbf, 0x0b, 0xe5, 0x8e, 0x4f, 0x1d, 0xfb, + /* (2^ 96)P */ 0xaf, 0xe8, 0x85, 0xbf, 0x7f, 0x37, 0x8d, 0x66, 0x7c, 0xd5, 0xd3, 0x96, 0xa5, 0x81, 0x67, 0x95, 0xff, 0x48, 0xde, 0xde, 0xd7, 0x7a, 0x46, 0x34, 0xb1, 0x13, 0x70, 0x29, 0xed, 0x87, 0x90, 0xb0, 0x40, 0x2c, 0xa6, 0x43, 0x6e, 0xb6, 0xbc, 0x48, 0x8a, 0xc1, 0xae, 0xb8, 0xd4, 0xe2, 0xc0, 0x32, 0xb2, 0xa6, 0x2a, 0x8f, 0xb5, 0x16, 0x9e, 0xc3, + /* (2^ 97)P */ 0xff, 0x4d, 0xd2, 0xd6, 0x74, 0xef, 0x2c, 0x96, 0xc1, 0x11, 0xa8, 0xb8, 0xfe, 0x94, 0x87, 0x3e, 0xa0, 0xfb, 0x57, 0xa3, 0xfc, 0x7a, 0x7e, 0x6a, 0x59, 0x6c, 0x54, 0xbb, 0xbb, 0xa2, 0x25, 0x38, 0x1b, 0xdf, 0x5d, 0x7b, 0x94, 0x14, 0xde, 0x07, 0x6e, 0xd3, 0xab, 0x02, 0x26, 0x74, 0x16, 0x12, 0xdf, 0x2e, 0x2a, 0xa7, 0xb0, 0xe8, 0x29, 0xc0, + /* (2^ 98)P */ 0x6a, 0x38, 0x0b, 0xd3, 0xba, 0x45, 0x23, 0xe0, 0x04, 0x3b, 0x83, 0x39, 0xc5, 0x11, 0xe6, 0xcf, 0x39, 0x0a, 0xb3, 0xb0, 0x3b, 0x27, 0x29, 0x63, 0x1c, 0xf3, 0x00, 0xe6, 0xd2, 0x55, 0x21, 0x1f, 0x84, 0x97, 0x9f, 0x01, 0x49, 0x43, 0x30, 0x5f, 0xe0, 0x1d, 0x24, 0xc4, 0x4e, 0xa0, 0x2b, 0x0b, 0x12, 0x55, 0xc3, 0x27, 0xae, 0x08, 0x83, 0x7c, + /* (2^ 99)P */ 0x5d, 0x1a, 0xb7, 0xa9, 0xf5, 0xfd, 0xec, 0xad, 0xb7, 0x87, 0x02, 0x5f, 0x0d, 0x30, 0x4d, 0xe2, 0x65, 0x87, 0xa4, 0x41, 0x45, 0x1d, 0x67, 0xe0, 0x30, 0x5c, 0x13, 0x87, 0xf6, 0x2e, 0x08, 0xc1, 0xc7, 0x12, 0x45, 0xc8, 0x9b, 0xad, 0xb8, 0xd5, 0x57, 0xbb, 0x5c, 0x48, 0x3a, 0xe1, 0x91, 0x5e, 0xf6, 0x4d, 0x8a, 0x63, 0x75, 0x69, 0x0c, 0x01, + /* (2^100)P */ 0x8f, 0x53, 0x2d, 0xa0, 0x71, 0x3d, 0xfc, 0x45, 0x10, 0x96, 0xcf, 0x56, 0xf9, 0xbb, 0x40, 0x3c, 0x86, 0x52, 0x76, 0xbe, 0x84, 0xf9, 0xa6, 0x9d, 0x3d, 0x27, 0xbe, 0xb4, 0x00, 0x49, 0x94, 0xf5, 0x5d, 0xe1, 0x62, 0x85, 0x66, 0xe5, 0xb8, 0x20, 0x2c, 0x09, 0x7d, 0x9d, 0x3d, 0x6e, 0x74, 0x39, 0xab, 0xad, 0xa0, 0x90, 0x97, 0x5f, 0xbb, 0xa7, + /* (2^101)P */ 0xdb, 0x2d, 0x99, 0x08, 0x16, 0x46, 0x83, 0x7a, 0xa8, 0xea, 0x3d, 0x28, 0x5b, 0x49, 0xfc, 0xb9, 0x6d, 0x00, 0x9e, 0x54, 0x4f, 0x47, 0x64, 0x9b, 0x58, 0x4d, 0x07, 0x0c, 0x6f, 0x29, 0x56, 0x0b, 0x00, 0x14, 0x85, 0x96, 0x41, 0x04, 0xb9, 0x5c, 0xa4, 0xf6, 0x16, 0x73, 0x6a, 0xc7, 0x62, 0x0c, 0x65, 0x2f, 0x93, 0xbf, 0xf7, 0xb9, 0xb7, 0xf1, + /* (2^102)P */ 0xeb, 0x6d, 0xb3, 0x46, 0x32, 0xd2, 0xcb, 0x08, 0x94, 0x14, 0xbf, 0x3f, 0xc5, 0xcb, 0x5f, 0x9f, 0x8a, 0x89, 0x0c, 0x1b, 0x45, 0xad, 0x4c, 0x50, 0xb4, 0xe1, 0xa0, 0x6b, 0x11, 0x92, 0xaf, 0x1f, 0x00, 0xcc, 0xe5, 0x13, 0x7e, 0xe4, 0x2e, 0xa0, 0x57, 0xf3, 0xa7, 0x84, 0x79, 0x7a, 0xc2, 0xb7, 0xb7, 0xfc, 0x5d, 0xa5, 0xa9, 0x64, 0xcc, 0xd8, + /* (2^103)P */ 0xa9, 0xc4, 0x12, 0x8b, 0x34, 0x78, 0x3e, 0x38, 0xfd, 0x3f, 0x87, 0xfa, 0x88, 0x94, 0xd5, 0xd9, 0x7f, 0xeb, 0x58, 0xff, 0xb9, 0x45, 0xdb, 0xa1, 0xed, 0x22, 0x28, 0x1d, 0x00, 0x6d, 0x79, 0x85, 0x7a, 0x75, 0x5d, 0xf0, 0xb1, 0x9e, 0x47, 0x28, 0x8c, 0x62, 0xdf, 0xfb, 0x4c, 0x7b, 0xc5, 0x1a, 0x42, 0x95, 0xef, 0x9a, 0xb7, 0x27, 0x7e, 0xda, + /* (2^104)P */ 0xca, 0xd5, 0xc0, 0x17, 0xa1, 0x66, 0x79, 0x9c, 0x2a, 0xb7, 0x0a, 0xfe, 0x62, 0xe4, 0x26, 0x78, 0x90, 0xa7, 0xcb, 0xb0, 0x4f, 0x6d, 0xf9, 0x8f, 0xf7, 0x7d, 0xac, 0xb8, 0x78, 0x1f, 0x41, 0xea, 0x97, 0x1e, 0x62, 0x97, 0x43, 0x80, 0x58, 0x80, 0xb6, 0x69, 0x7d, 0xee, 0x16, 0xd2, 0xa1, 0x81, 0xd7, 0xb1, 0x27, 0x03, 0x48, 0xda, 0xab, 0xec, + /* (2^105)P */ 0x5b, 0xed, 0x40, 0x8e, 0x8c, 0xc1, 0x66, 0x90, 0x7f, 0x0c, 0xb2, 0xfc, 0xbd, 0x16, 0xac, 0x7d, 0x4c, 0x6a, 0xf9, 0xae, 0xe7, 0x4e, 0x11, 0x12, 0xe9, 0xbe, 0x17, 0x09, 0xc6, 0xc1, 0x5e, 0xb5, 0x7b, 0x50, 0x5c, 0x27, 0xfb, 0x80, 0xab, 0x01, 0xfa, 0x5b, 0x9b, 0x75, 0x16, 0x6e, 0xb2, 0x5c, 0x8c, 0x2f, 0xa5, 0x6a, 0x1a, 0x68, 0xa6, 0x90, + /* (2^106)P */ 0x75, 0xfe, 0xb6, 0x96, 0x96, 0x87, 0x4c, 0x12, 0xa9, 0xd1, 0xd8, 0x03, 0xa3, 0xc1, 0x15, 0x96, 0xe8, 0xa0, 0x75, 0x82, 0xa0, 0x6d, 0xea, 0x54, 0xdc, 0x5f, 0x0d, 0x7e, 0xf6, 0x70, 0xb5, 0xdc, 0x7a, 0xf6, 0xc4, 0xd4, 0x21, 0x49, 0xf5, 0xd4, 0x14, 0x6d, 0x48, 0x1d, 0x7c, 0x99, 0x42, 0xdf, 0x78, 0x6b, 0x9d, 0xb9, 0x30, 0x3c, 0xd0, 0x29, + /* (2^107)P */ 0x85, 0xd6, 0xd8, 0xf3, 0x91, 0x74, 0xdd, 0xbd, 0x72, 0x96, 0x10, 0xe4, 0x76, 0x02, 0x5a, 0x72, 0x67, 0xd3, 0x17, 0x72, 0x14, 0x9a, 0x20, 0x5b, 0x0f, 0x8d, 0xed, 0x6d, 0x4e, 0xe3, 0xd9, 0x82, 0xc2, 0x99, 0xee, 0x39, 0x61, 0x69, 0x8a, 0x24, 0x01, 0x92, 0x15, 0xe7, 0xfc, 0xf9, 0x4d, 0xac, 0xf1, 0x30, 0x49, 0x01, 0x0b, 0x6e, 0x0f, 0x20, + /* (2^108)P */ 0xd8, 0x25, 0x94, 0x5e, 0x43, 0x29, 0xf5, 0xcc, 0xe8, 0xe3, 0x55, 0x41, 0x3c, 0x9f, 0x58, 0x5b, 0x00, 0xeb, 0xc5, 0xdf, 0xcf, 0xfb, 0xfd, 0x6e, 0x92, 0xec, 0x99, 0x30, 0xd6, 0x05, 0xdd, 0x80, 0x7a, 0x5d, 0x6d, 0x16, 0x85, 0xd8, 0x9d, 0x43, 0x65, 0xd8, 0x2c, 0x33, 0x2f, 0x5c, 0x41, 0xea, 0xb7, 0x95, 0x77, 0xf2, 0x9e, 0x59, 0x09, 0xe8, + /* (2^109)P */ 0x00, 0xa0, 0x03, 0x80, 0xcd, 0x60, 0xe5, 0x17, 0xd4, 0x15, 0x99, 0xdd, 0x4f, 0xbf, 0x66, 0xb8, 0xc0, 0xf5, 0xf9, 0xfc, 0x6d, 0x42, 0x18, 0x34, 0x1c, 0x7d, 0x5b, 0xb5, 0x09, 0xd0, 0x99, 0x57, 0x81, 0x0b, 0x62, 0xb3, 0xa2, 0xf9, 0x0b, 0xae, 0x95, 0xb8, 0xc2, 0x3b, 0x0d, 0x5b, 0x00, 0xf1, 0xed, 0xbc, 0x05, 0x9d, 0x61, 0xbc, 0x73, 0x9d, + /* (2^110)P */ 0xd4, 0xdb, 0x29, 0xe5, 0x85, 0xe9, 0xc6, 0x89, 0x2a, 0xa8, 0x54, 0xab, 0xb3, 0x7f, 0x88, 0xc0, 0x4d, 0xe0, 0xd1, 0x74, 0x6e, 0xa3, 0xa7, 0x39, 0xd5, 0xcc, 0xa1, 0x8a, 0xcb, 0x5b, 0x34, 0xad, 0x92, 0xb4, 0xd8, 0xd5, 0x17, 0xf6, 0x77, 0x18, 0x9e, 0xaf, 0x45, 0x3b, 0x03, 0xe2, 0xf8, 0x52, 0x60, 0xdc, 0x15, 0x20, 0x9e, 0xdf, 0xd8, 0x5d, + /* (2^111)P */ 0x02, 0xc1, 0xac, 0x1a, 0x15, 0x8e, 0x6c, 0xf5, 0x1e, 0x1e, 0xba, 0x7e, 0xc2, 0xda, 0x7d, 0x02, 0xda, 0x43, 0xae, 0x04, 0x70, 0x28, 0x54, 0x78, 0x94, 0xf5, 0x4f, 0x07, 0x84, 0x8f, 0xed, 0xaa, 0xc0, 0xb8, 0xcd, 0x7f, 0x7e, 0x33, 0xa3, 0xbe, 0x21, 0x29, 0xc8, 0x56, 0x34, 0xc0, 0x76, 0x87, 0x8f, 0xc7, 0x73, 0x58, 0x90, 0x16, 0xfc, 0xd6, + /* (2^112)P */ 0xb8, 0x3f, 0xe1, 0xdf, 0x3a, 0x91, 0x25, 0x0c, 0xf6, 0x47, 0xa8, 0x89, 0xc4, 0xc6, 0x61, 0xec, 0x86, 0x2c, 0xfd, 0xbe, 0xa4, 0x6f, 0xc2, 0xd4, 0x46, 0x19, 0x70, 0x5d, 0x09, 0x02, 0x86, 0xd3, 0x4b, 0xe9, 0x16, 0x7b, 0xf0, 0x0d, 0x6c, 0xff, 0x91, 0x05, 0xbf, 0x55, 0xb4, 0x00, 0x8d, 0xe5, 0x6d, 0x68, 0x20, 0x90, 0x12, 0xb5, 0x5c, 0x32, + /* (2^113)P */ 0x80, 0x45, 0xc8, 0x51, 0x87, 0xba, 0x1c, 0x5c, 0xcf, 0x5f, 0x4b, 0x3c, 0x9e, 0x3b, 0x36, 0xd2, 0x26, 0xa2, 0x7f, 0xab, 0xb7, 0xbf, 0xda, 0x68, 0x23, 0x8f, 0xc3, 0xa0, 0xfd, 0xad, 0xf1, 0x56, 0x3b, 0xd0, 0x75, 0x2b, 0x44, 0x61, 0xd8, 0xf4, 0xf1, 0x05, 0x49, 0x53, 0x07, 0xee, 0x47, 0xef, 0xc0, 0x7c, 0x9d, 0xe4, 0x15, 0x88, 0xc5, 0x47, + /* (2^114)P */ 0x2d, 0xb5, 0x09, 0x80, 0xb9, 0xd3, 0xd8, 0xfe, 0x4c, 0xd2, 0xa6, 0x6e, 0xd3, 0x75, 0xcf, 0xb0, 0x99, 0xcb, 0x50, 0x8d, 0xe9, 0x67, 0x9b, 0x20, 0xe8, 0x57, 0xd8, 0x14, 0x85, 0x73, 0x6a, 0x74, 0xe0, 0x99, 0xf0, 0x6b, 0x6e, 0x59, 0x30, 0x31, 0x33, 0x96, 0x5f, 0xa1, 0x0c, 0x1b, 0xf4, 0xca, 0x09, 0xe1, 0x9b, 0xb5, 0xcf, 0x6d, 0x0b, 0xeb, + /* (2^115)P */ 0x1a, 0xde, 0x50, 0xa9, 0xac, 0x3e, 0x10, 0x43, 0x4f, 0x82, 0x4f, 0xc0, 0xfe, 0x3f, 0x33, 0xd2, 0x64, 0x86, 0x50, 0xa9, 0x51, 0x76, 0x5e, 0x50, 0x97, 0x6c, 0x73, 0x8d, 0x77, 0xa3, 0x75, 0x03, 0xbc, 0xc9, 0xfb, 0x50, 0xd9, 0x6d, 0x16, 0xad, 0x5d, 0x32, 0x3d, 0xac, 0x44, 0xdf, 0x51, 0xf7, 0x19, 0xd4, 0x0b, 0x57, 0x78, 0x0b, 0x81, 0x4e, + /* (2^116)P */ 0x32, 0x24, 0xf1, 0x6c, 0x55, 0x62, 0x1d, 0xb3, 0x1f, 0xda, 0xfa, 0x6a, 0x8f, 0x98, 0x01, 0x16, 0xde, 0x44, 0x50, 0x0d, 0x2e, 0x6c, 0x0b, 0xa2, 0xd3, 0x74, 0x0e, 0xa9, 0xbf, 0x8d, 0xa9, 0xc8, 0xc8, 0x2f, 0x62, 0xc1, 0x35, 0x5e, 0xfd, 0x3a, 0xb3, 0x83, 0x2d, 0xee, 0x4e, 0xfd, 0x5c, 0x5e, 0xad, 0x85, 0xa5, 0x10, 0xb5, 0x4f, 0x34, 0xa7, + /* (2^117)P */ 0xd1, 0x58, 0x6f, 0xe6, 0x54, 0x2c, 0xc2, 0xcd, 0xcf, 0x83, 0xdc, 0x88, 0x0c, 0xb9, 0xb4, 0x62, 0x18, 0x89, 0x65, 0x28, 0xe9, 0x72, 0x4b, 0x65, 0xcf, 0xd6, 0x90, 0x88, 0xd7, 0x76, 0x17, 0x4f, 0x74, 0x64, 0x1e, 0xcb, 0xd3, 0xf5, 0x4b, 0xaa, 0x2e, 0x4d, 0x2d, 0x7c, 0x13, 0x1f, 0xfd, 0xd9, 0x60, 0x83, 0x7e, 0xda, 0x64, 0x1c, 0xdc, 0x9f, + /* (2^118)P */ 0xad, 0xef, 0xac, 0x1b, 0xc1, 0x30, 0x5a, 0x15, 0xc9, 0x1f, 0xac, 0xf1, 0xca, 0x44, 0x95, 0x95, 0xea, 0xf2, 0x22, 0xe7, 0x8d, 0x25, 0xf0, 0xff, 0xd8, 0x71, 0xf7, 0xf8, 0x8f, 0x8f, 0xcd, 0xf4, 0x1e, 0xfe, 0x6c, 0x68, 0x04, 0xb8, 0x78, 0xa1, 0x5f, 0xa6, 0x5d, 0x5e, 0xf9, 0x8d, 0xea, 0x80, 0xcb, 0xf3, 0x17, 0xa6, 0x03, 0xc9, 0x38, 0xd5, + /* (2^119)P */ 0x79, 0x14, 0x31, 0xc3, 0x38, 0xe5, 0xaa, 0xbf, 0x17, 0xa3, 0x04, 0x4e, 0x80, 0x59, 0x9c, 0x9f, 0x19, 0x39, 0xe4, 0x2d, 0x23, 0x54, 0x4a, 0x7f, 0x3e, 0xf3, 0xd9, 0xc7, 0xba, 0x6c, 0x8f, 0x6b, 0xfa, 0x34, 0xb5, 0x23, 0x17, 0x1d, 0xff, 0x1d, 0xea, 0x1f, 0xd7, 0xba, 0x61, 0xb2, 0xe0, 0x38, 0x6a, 0xe9, 0xcf, 0x48, 0x5d, 0x6a, 0x10, 0x9c, + /* (2^120)P */ 0xc8, 0xbb, 0x13, 0x1c, 0x3f, 0x3c, 0x34, 0xfd, 0xac, 0x37, 0x52, 0x44, 0x25, 0xa8, 0xde, 0x1d, 0x63, 0xf4, 0x81, 0x9a, 0xbe, 0x0b, 0x74, 0x2e, 0xc8, 0x51, 0x16, 0xd3, 0xac, 0x4a, 0xaf, 0xe2, 0x5f, 0x3a, 0x89, 0x32, 0xd1, 0x9b, 0x7c, 0x90, 0x0d, 0xac, 0xdc, 0x8b, 0x73, 0x45, 0x45, 0x97, 0xb1, 0x90, 0x2c, 0x1b, 0x31, 0xca, 0xb1, 0x94, + /* (2^121)P */ 0x07, 0x28, 0xdd, 0x10, 0x14, 0xa5, 0x95, 0x7e, 0xf3, 0xe4, 0xd4, 0x14, 0xb4, 0x7e, 0x76, 0xdb, 0x42, 0xd6, 0x94, 0x3e, 0xeb, 0x44, 0x64, 0x88, 0x0d, 0xec, 0xc1, 0x21, 0xf0, 0x79, 0xe0, 0x83, 0x67, 0x55, 0x53, 0xc2, 0xf6, 0xc5, 0xc5, 0x89, 0x39, 0xe8, 0x42, 0xd0, 0x17, 0xbd, 0xff, 0x35, 0x59, 0x0e, 0xc3, 0x06, 0x86, 0xd4, 0x64, 0xcf, + /* (2^122)P */ 0x91, 0xa8, 0xdb, 0x57, 0x9b, 0xe2, 0x96, 0x31, 0x10, 0x6e, 0xd7, 0x9a, 0x97, 0xb3, 0xab, 0xb5, 0x15, 0x66, 0xbe, 0xcc, 0x6d, 0x9a, 0xac, 0x06, 0xb3, 0x0d, 0xaa, 0x4b, 0x9c, 0x96, 0x79, 0x6c, 0x34, 0xee, 0x9e, 0x53, 0x4d, 0x6e, 0xbd, 0x88, 0x02, 0xbf, 0x50, 0x54, 0x12, 0x5d, 0x01, 0x02, 0x46, 0xc6, 0x74, 0x02, 0x8c, 0x24, 0xae, 0xb1, + /* (2^123)P */ 0xf5, 0x22, 0xea, 0xac, 0x7d, 0x9c, 0x33, 0x8a, 0xa5, 0x36, 0x79, 0x6a, 0x4f, 0xa4, 0xdc, 0xa5, 0x73, 0x64, 0xc4, 0x6f, 0x43, 0x02, 0x3b, 0x94, 0x66, 0xd2, 0x4b, 0x4f, 0xf6, 0x45, 0x33, 0x5d, 0x10, 0x33, 0x18, 0x1e, 0xa3, 0xfc, 0xf7, 0xd2, 0xb8, 0xc8, 0xa7, 0xe0, 0x76, 0x8a, 0xcd, 0xff, 0x4f, 0x99, 0x34, 0x47, 0x84, 0x91, 0x96, 0x9f, + /* (2^124)P */ 0x8a, 0x48, 0x3b, 0x48, 0x4a, 0xbc, 0xac, 0xe2, 0x80, 0xd6, 0xd2, 0x35, 0xde, 0xd0, 0x56, 0x42, 0x33, 0xb3, 0x56, 0x5a, 0xcd, 0xb8, 0x3d, 0xb5, 0x25, 0xc1, 0xed, 0xff, 0x87, 0x0b, 0x79, 0xff, 0xf2, 0x62, 0xe1, 0x76, 0xc6, 0xa2, 0x0f, 0xa8, 0x9b, 0x0d, 0xcc, 0x3f, 0x3d, 0x35, 0x27, 0x8d, 0x0b, 0x74, 0xb0, 0xc3, 0x78, 0x8c, 0xcc, 0xc8, + /* (2^125)P */ 0xfc, 0x9a, 0x0c, 0xa8, 0x49, 0x42, 0xb8, 0xdf, 0xcf, 0xb3, 0x19, 0xa6, 0x64, 0x57, 0xfe, 0xe8, 0xf8, 0xa6, 0x4b, 0x86, 0xa1, 0xd5, 0x83, 0x7f, 0x14, 0x99, 0x18, 0x0c, 0x7d, 0x5b, 0xf7, 0x3d, 0xf9, 0x4b, 0x79, 0xb1, 0x86, 0x30, 0xb4, 0x5e, 0x6a, 0xe8, 0x9d, 0xfa, 0x8a, 0x41, 0xc4, 0x30, 0xfc, 0x56, 0x74, 0x14, 0x42, 0xc8, 0x96, 0x0e, + /* (2^126)P */ 0xdf, 0x66, 0xec, 0xbc, 0x44, 0xdb, 0x19, 0xce, 0xd4, 0xb5, 0x49, 0x40, 0x07, 0x49, 0xe0, 0x3a, 0x61, 0x10, 0xfb, 0x7d, 0xba, 0xb1, 0xe0, 0x28, 0x5b, 0x99, 0x59, 0x96, 0xa2, 0xee, 0xe0, 0x23, 0x37, 0x39, 0x1f, 0xe6, 0x57, 0x9f, 0xf8, 0xf8, 0xdc, 0x74, 0xf6, 0x8f, 0x4f, 0x5e, 0x51, 0xa4, 0x12, 0xac, 0xbe, 0xe4, 0xf3, 0xd1, 0xf0, 0x24, + /* (2^127)P */ 0x1e, 0x3e, 0x9a, 0x5f, 0xdf, 0x9f, 0xd6, 0x4e, 0x8a, 0x28, 0xc3, 0xcd, 0x96, 0x9d, 0x57, 0xc7, 0x61, 0x81, 0x90, 0xff, 0xae, 0xb1, 0x4f, 0xc2, 0x96, 0x8b, 0x1a, 0x18, 0xf4, 0x50, 0xcb, 0x31, 0xe1, 0x57, 0xf4, 0x90, 0xa8, 0xea, 0xac, 0xe7, 0x61, 0x98, 0xb6, 0x15, 0xc1, 0x7b, 0x29, 0xa4, 0xc3, 0x18, 0xef, 0xb9, 0xd8, 0xdf, 0xf6, 0xac, + /* (2^128)P */ 0xca, 0xa8, 0x6c, 0xf1, 0xb4, 0xca, 0xfe, 0x31, 0xee, 0x48, 0x38, 0x8b, 0x0e, 0xbb, 0x7a, 0x30, 0xaa, 0xf9, 0xee, 0x27, 0x53, 0x24, 0xdc, 0x2e, 0x15, 0xa6, 0x48, 0x8f, 0xa0, 0x7e, 0xf1, 0xdc, 0x93, 0x87, 0x39, 0xeb, 0x7f, 0x38, 0x92, 0x92, 0x4c, 0x29, 0xe9, 0x57, 0xd8, 0x59, 0xfc, 0xe9, 0x9c, 0x44, 0xc0, 0x65, 0xcf, 0xac, 0x4b, 0xdc, + /* (2^129)P */ 0xa3, 0xd0, 0x37, 0x8f, 0x86, 0x2f, 0xc6, 0x47, 0x55, 0x46, 0x65, 0x26, 0x4b, 0x91, 0xe2, 0x18, 0x5c, 0x4f, 0x23, 0xc1, 0x37, 0x29, 0xb9, 0xc1, 0x27, 0xc5, 0x3c, 0xbf, 0x7e, 0x23, 0xdb, 0x73, 0x99, 0xbd, 0x1b, 0xb2, 0x31, 0x68, 0x3a, 0xad, 0xb7, 0xb0, 0x10, 0xc5, 0xe5, 0x11, 0x51, 0xba, 0xa7, 0x60, 0x66, 0x54, 0xf0, 0x08, 0xd7, 0x69, + /* (2^130)P */ 0x89, 0x41, 0x79, 0xcc, 0xeb, 0x0a, 0xf5, 0x4b, 0xa3, 0x4c, 0xce, 0x52, 0xb0, 0xa7, 0xe4, 0x41, 0x75, 0x7d, 0x04, 0xbb, 0x09, 0x4c, 0x50, 0x9f, 0xdf, 0xea, 0x74, 0x61, 0x02, 0xad, 0xb4, 0x9d, 0xb7, 0x05, 0xb9, 0xea, 0xeb, 0x91, 0x35, 0xe7, 0x49, 0xea, 0xd3, 0x4f, 0x3c, 0x60, 0x21, 0x7a, 0xde, 0xc7, 0xe2, 0x5a, 0xee, 0x8e, 0x93, 0xc7, + /* (2^131)P */ 0x00, 0xe8, 0xed, 0xd0, 0xb3, 0x0d, 0xaf, 0xb2, 0xde, 0x2c, 0xf6, 0x00, 0xe2, 0xea, 0x6d, 0xf8, 0x0e, 0xd9, 0x67, 0x59, 0xa9, 0x50, 0xbb, 0x17, 0x8f, 0xff, 0xb1, 0x9f, 0x17, 0xb6, 0xf2, 0xb5, 0xba, 0x80, 0xf7, 0x0f, 0xba, 0xd5, 0x09, 0x43, 0xaa, 0x4e, 0x3a, 0x67, 0x6a, 0x89, 0x9b, 0x18, 0x65, 0x35, 0xf8, 0x3a, 0x49, 0x91, 0x30, 0x51, + /* (2^132)P */ 0x8d, 0x25, 0xe9, 0x0e, 0x7d, 0x50, 0x76, 0xe4, 0x58, 0x7e, 0xb9, 0x33, 0xe6, 0x65, 0x90, 0xc2, 0x50, 0x9d, 0x50, 0x2e, 0x11, 0xad, 0xd5, 0x43, 0x52, 0x32, 0x41, 0x4f, 0x7b, 0xb6, 0xa0, 0xec, 0x81, 0x75, 0x36, 0x7c, 0x77, 0x85, 0x59, 0x70, 0xe4, 0xf9, 0xef, 0x66, 0x8d, 0x35, 0xc8, 0x2a, 0x6e, 0x5b, 0xc6, 0x0d, 0x0b, 0x29, 0x60, 0x68, + /* (2^133)P */ 0xf8, 0xce, 0xb0, 0x3a, 0x56, 0x7d, 0x51, 0x9a, 0x25, 0x73, 0xea, 0xdd, 0xe4, 0xe0, 0x0e, 0xf0, 0x07, 0xc0, 0x31, 0x00, 0x73, 0x35, 0xd0, 0x39, 0xc4, 0x9b, 0xb7, 0x95, 0xe0, 0x62, 0x70, 0x36, 0x0b, 0xcb, 0xa0, 0x42, 0xde, 0x51, 0xcf, 0x41, 0xe0, 0xb8, 0xb4, 0xc0, 0xe5, 0x46, 0x99, 0x9f, 0x02, 0x7f, 0x14, 0x8c, 0xc1, 0x4e, 0xef, 0xe8, + /* (2^134)P */ 0x10, 0x01, 0x57, 0x0a, 0xbe, 0x8b, 0x18, 0xc8, 0xca, 0x00, 0x28, 0x77, 0x4a, 0x9a, 0xc7, 0x55, 0x2a, 0xcc, 0x0c, 0x7b, 0xb9, 0xe9, 0xc8, 0x97, 0x7c, 0x02, 0xe3, 0x09, 0x2f, 0x62, 0x30, 0xb8, 0x40, 0x09, 0x65, 0xe9, 0x55, 0x63, 0xb5, 0x07, 0xca, 0x9f, 0x00, 0xdf, 0x9d, 0x5c, 0xc7, 0xee, 0x57, 0xa5, 0x90, 0x15, 0x1e, 0x22, 0xa0, 0x12, + /* (2^135)P */ 0x71, 0x2d, 0xc9, 0xef, 0x27, 0xb9, 0xd8, 0x12, 0x43, 0x6b, 0xa8, 0xce, 0x3b, 0x6d, 0x6e, 0x91, 0x43, 0x23, 0xbc, 0x32, 0xb3, 0xbf, 0xe1, 0xc7, 0x39, 0xcf, 0x7c, 0x42, 0x4c, 0xb1, 0x30, 0xe2, 0xdd, 0x69, 0x06, 0xe5, 0xea, 0xf0, 0x2a, 0x16, 0x50, 0x71, 0xca, 0x92, 0xdf, 0xc1, 0xcc, 0xec, 0xe6, 0x54, 0x07, 0xf3, 0x18, 0x8d, 0xd8, 0x29, + /* (2^136)P */ 0x98, 0x51, 0x48, 0x8f, 0xfa, 0x2e, 0x5e, 0x67, 0xb0, 0xc6, 0x17, 0x12, 0xb6, 0x7d, 0xc9, 0xad, 0x81, 0x11, 0xad, 0x0c, 0x1c, 0x2d, 0x45, 0xdf, 0xac, 0x66, 0xbd, 0x08, 0x6f, 0x7c, 0xc7, 0x06, 0x6e, 0x19, 0x08, 0x39, 0x64, 0xd7, 0xe4, 0xd1, 0x11, 0x5f, 0x1c, 0xf4, 0x67, 0xc3, 0x88, 0x6a, 0xe6, 0x07, 0xa3, 0x83, 0xd7, 0xfd, 0x2a, 0xf9, + /* (2^137)P */ 0x87, 0xed, 0xeb, 0xd9, 0xdf, 0xff, 0x43, 0x8b, 0xaa, 0x20, 0x58, 0xb0, 0xb4, 0x6b, 0x14, 0xb8, 0x02, 0xc5, 0x40, 0x20, 0x22, 0xbb, 0xf7, 0xb4, 0xf3, 0x05, 0x1e, 0x4d, 0x94, 0xff, 0xe3, 0xc5, 0x22, 0x82, 0xfe, 0xaf, 0x90, 0x42, 0x98, 0x6b, 0x76, 0x8b, 0x3e, 0x89, 0x3f, 0x42, 0x2a, 0xa7, 0x26, 0x00, 0xda, 0x5c, 0xa2, 0x2b, 0xec, 0xdd, + /* (2^138)P */ 0x5c, 0x21, 0x16, 0x0d, 0x46, 0xb8, 0xd0, 0xa7, 0x88, 0xe7, 0x25, 0xcb, 0x3e, 0x50, 0x73, 0x61, 0xe7, 0xaf, 0x5a, 0x3f, 0x47, 0x8b, 0x3d, 0x97, 0x79, 0x2c, 0xe6, 0x6d, 0x95, 0x74, 0x65, 0x70, 0x36, 0xfd, 0xd1, 0x9e, 0x13, 0x18, 0x63, 0xb1, 0x2d, 0x0b, 0xb5, 0x36, 0x3e, 0xe7, 0x35, 0x42, 0x3b, 0xe6, 0x1f, 0x4d, 0x9d, 0x59, 0xa2, 0x43, + /* (2^139)P */ 0x8c, 0x0c, 0x7c, 0x24, 0x9e, 0xe0, 0xf8, 0x05, 0x1c, 0x9e, 0x1f, 0x31, 0xc0, 0x70, 0xb3, 0xfb, 0x4e, 0xf8, 0x0a, 0x57, 0xb7, 0x49, 0xb5, 0x73, 0xa1, 0x5f, 0x9b, 0x6a, 0x07, 0x6c, 0x87, 0x71, 0x87, 0xd4, 0xbe, 0x98, 0x1e, 0x98, 0xee, 0x52, 0xc1, 0x7b, 0x95, 0x0f, 0x28, 0x32, 0x36, 0x28, 0xd0, 0x3a, 0x0f, 0x7d, 0x2a, 0xa9, 0x62, 0xb9, + /* (2^140)P */ 0x97, 0xe6, 0x18, 0x77, 0xf9, 0x34, 0xac, 0xbc, 0xe0, 0x62, 0x9f, 0x42, 0xde, 0xbd, 0x2f, 0xf7, 0x1f, 0xb7, 0x14, 0x52, 0x8a, 0x79, 0xb2, 0x3f, 0xd2, 0x95, 0x71, 0x01, 0xe8, 0xaf, 0x8c, 0xa4, 0xa4, 0xa7, 0x27, 0xf3, 0x5c, 0xdf, 0x3e, 0x57, 0x7a, 0xf1, 0x76, 0x49, 0xe6, 0x42, 0x3f, 0x8f, 0x1e, 0x63, 0x4a, 0x65, 0xb5, 0x41, 0xf5, 0x02, + /* (2^141)P */ 0x72, 0x85, 0xc5, 0x0b, 0xe1, 0x47, 0x64, 0x02, 0xc5, 0x4d, 0x81, 0x69, 0xb2, 0xcf, 0x0f, 0x6c, 0xd4, 0x6d, 0xd0, 0xc7, 0xb4, 0x1c, 0xd0, 0x32, 0x59, 0x89, 0xe2, 0xe0, 0x96, 0x8b, 0x12, 0x98, 0xbf, 0x63, 0x7a, 0x4c, 0x76, 0x7e, 0x58, 0x17, 0x8f, 0x5b, 0x0a, 0x59, 0x65, 0x75, 0xbc, 0x61, 0x1f, 0xbe, 0xc5, 0x6e, 0x0a, 0x57, 0x52, 0x70, + /* (2^142)P */ 0x92, 0x1c, 0x77, 0xbb, 0x62, 0x02, 0x6c, 0x25, 0x9c, 0x66, 0x07, 0x83, 0xab, 0xcc, 0x80, 0x5d, 0xd2, 0x76, 0x0c, 0xa4, 0xc5, 0xb4, 0x8a, 0x68, 0x23, 0x31, 0x32, 0x29, 0x8a, 0x47, 0x92, 0x12, 0x80, 0xb3, 0xfa, 0x18, 0xe4, 0x8d, 0xc0, 0x4d, 0xfe, 0x97, 0x5f, 0x72, 0x41, 0xb5, 0x5c, 0x7a, 0xbd, 0xf0, 0xcf, 0x5e, 0x97, 0xaa, 0x64, 0x32, + /* (2^143)P */ 0x35, 0x3f, 0x75, 0xc1, 0x7a, 0x75, 0x7e, 0xa9, 0xc6, 0x0b, 0x4e, 0x32, 0x62, 0xec, 0xe3, 0x5c, 0xfb, 0x01, 0x43, 0xb6, 0xd4, 0x5b, 0x75, 0xd2, 0xee, 0x7f, 0x5d, 0x23, 0x2b, 0xb3, 0x54, 0x34, 0x4c, 0xd3, 0xb4, 0x32, 0x84, 0x81, 0xb5, 0x09, 0x76, 0x19, 0xda, 0x58, 0xda, 0x7c, 0xdb, 0x2e, 0xdd, 0x4c, 0x8e, 0xdd, 0x5d, 0x89, 0x10, 0x10, + /* (2^144)P */ 0x57, 0x25, 0x6a, 0x08, 0x37, 0x92, 0xa8, 0xdf, 0x24, 0xef, 0x8f, 0x33, 0x34, 0x52, 0xa4, 0x4c, 0xf0, 0x77, 0x9f, 0x69, 0x77, 0xd5, 0x8f, 0xd2, 0x9a, 0xb3, 0xb6, 0x1d, 0x2d, 0xa6, 0xf7, 0x1f, 0xda, 0xd7, 0xcb, 0x75, 0x11, 0xc3, 0x6b, 0xc0, 0x38, 0xb1, 0xd5, 0x2d, 0x96, 0x84, 0x16, 0xfa, 0x26, 0xb9, 0xcc, 0x3f, 0x16, 0x47, 0x23, 0x74, + /* (2^145)P */ 0x9b, 0x61, 0x2a, 0x1c, 0xdd, 0x39, 0xa5, 0xfa, 0x1c, 0x7d, 0x63, 0x50, 0xca, 0xe6, 0x9d, 0xfa, 0xb7, 0xc4, 0x4c, 0x6a, 0x97, 0x5f, 0x36, 0x4e, 0x47, 0xdd, 0x17, 0xf7, 0xf9, 0x19, 0xce, 0x75, 0x17, 0xad, 0xce, 0x2a, 0xf3, 0xfe, 0x27, 0x8f, 0x3e, 0x48, 0xc0, 0x60, 0x87, 0x24, 0x19, 0xae, 0x59, 0xe4, 0x5a, 0x00, 0x2a, 0xba, 0xa2, 0x1f, + /* (2^146)P */ 0x26, 0x88, 0x42, 0x60, 0x9f, 0x6e, 0x2c, 0x7c, 0x39, 0x0f, 0x47, 0x6a, 0x0e, 0x02, 0xbb, 0x4b, 0x34, 0x29, 0x55, 0x18, 0x36, 0xcf, 0x3b, 0x47, 0xf1, 0x2e, 0xfc, 0x6e, 0x94, 0xff, 0xe8, 0x6b, 0x06, 0xd2, 0xba, 0x77, 0x5e, 0x60, 0xd7, 0x19, 0xef, 0x02, 0x9d, 0x3a, 0xc2, 0xb7, 0xa9, 0xd8, 0x57, 0xee, 0x7e, 0x2b, 0xf2, 0x6d, 0x28, 0xda, + /* (2^147)P */ 0xdf, 0xd9, 0x92, 0x11, 0x98, 0x23, 0xe2, 0x45, 0x2f, 0x74, 0x70, 0xee, 0x0e, 0x55, 0x65, 0x79, 0x86, 0x38, 0x17, 0x92, 0x85, 0x87, 0x99, 0x50, 0xd9, 0x7c, 0xdb, 0xa1, 0x10, 0xec, 0x30, 0xb7, 0x40, 0xa3, 0x23, 0x9b, 0x0e, 0x27, 0x49, 0x29, 0x03, 0x94, 0xff, 0x53, 0xdc, 0xd7, 0xed, 0x49, 0xa9, 0x5a, 0x3b, 0xee, 0xd7, 0xc7, 0x65, 0xaf, + /* (2^148)P */ 0xa0, 0xbd, 0xbe, 0x03, 0xee, 0x0c, 0xbe, 0x32, 0x00, 0x7b, 0x52, 0xcb, 0x92, 0x29, 0xbf, 0xa0, 0xc6, 0xd9, 0xd2, 0xd6, 0x15, 0xe8, 0x3a, 0x75, 0x61, 0x65, 0x56, 0xae, 0xad, 0x3c, 0x2a, 0x64, 0x14, 0x3f, 0x8e, 0xc1, 0x2d, 0x0c, 0x8d, 0x20, 0xdb, 0x58, 0x4b, 0xe5, 0x40, 0x15, 0x4b, 0xdc, 0xa8, 0xbd, 0xef, 0x08, 0xa7, 0xd1, 0xf4, 0xb0, + /* (2^149)P */ 0xa9, 0x0f, 0x05, 0x94, 0x66, 0xac, 0x1f, 0x65, 0x3f, 0xe1, 0xb8, 0xe1, 0x34, 0x5e, 0x1d, 0x8f, 0xe3, 0x93, 0x03, 0x15, 0xff, 0xb6, 0x65, 0xb6, 0x6e, 0xc0, 0x2f, 0xd4, 0x2e, 0xb9, 0x2c, 0x13, 0x3c, 0x99, 0x1c, 0xb5, 0x87, 0xba, 0x79, 0xcb, 0xf0, 0x18, 0x06, 0x86, 0x04, 0x14, 0x25, 0x09, 0xcd, 0x1c, 0x14, 0xda, 0x35, 0xd0, 0x38, 0x3b, + /* (2^150)P */ 0x1b, 0x04, 0xa3, 0x27, 0xb4, 0xd3, 0x37, 0x48, 0x1e, 0x8f, 0x69, 0xd3, 0x5a, 0x2f, 0x20, 0x02, 0x36, 0xbe, 0x06, 0x7b, 0x6b, 0x6c, 0x12, 0x5b, 0x80, 0x74, 0x44, 0xe6, 0xf8, 0xf5, 0x95, 0x59, 0x29, 0xab, 0x51, 0x47, 0x83, 0x28, 0xe0, 0xad, 0xde, 0xaa, 0xd3, 0xb1, 0x1a, 0xcb, 0xa3, 0xcd, 0x8b, 0x6a, 0xb1, 0xa7, 0x0a, 0xd1, 0xf9, 0xbe, + /* (2^151)P */ 0xce, 0x2f, 0x85, 0xca, 0x74, 0x6d, 0x49, 0xb8, 0xce, 0x80, 0x44, 0xe0, 0xda, 0x5b, 0xcf, 0x2f, 0x79, 0x74, 0xfe, 0xb4, 0x2c, 0x99, 0x20, 0x6e, 0x09, 0x04, 0xfb, 0x6d, 0x57, 0x5b, 0x95, 0x0c, 0x45, 0xda, 0x4f, 0x7f, 0x63, 0xcc, 0x85, 0x5a, 0x67, 0x50, 0x68, 0x71, 0xb4, 0x67, 0xb1, 0x2e, 0xc1, 0x1c, 0xdc, 0xff, 0x2a, 0x7c, 0x10, 0x5e, + /* (2^152)P */ 0xa6, 0xde, 0xf3, 0xd4, 0x22, 0x30, 0x24, 0x9e, 0x0b, 0x30, 0x54, 0x59, 0x7e, 0xa2, 0xeb, 0x89, 0x54, 0x65, 0x3e, 0x40, 0xd1, 0xde, 0xe6, 0xee, 0x4d, 0xbf, 0x5e, 0x40, 0x1d, 0xee, 0x4f, 0x68, 0xd9, 0xa7, 0x2f, 0xb3, 0x64, 0xb3, 0xf5, 0xc8, 0xd3, 0xaa, 0x70, 0x70, 0x3d, 0xef, 0xd3, 0x95, 0x54, 0xdb, 0x3e, 0x94, 0x95, 0x92, 0x1f, 0x45, + /* (2^153)P */ 0x22, 0x80, 0x1d, 0x9d, 0x96, 0xa5, 0x78, 0x6f, 0xe0, 0x1e, 0x1b, 0x66, 0x42, 0xc8, 0xae, 0x9e, 0x46, 0x45, 0x08, 0x41, 0xdf, 0x80, 0xae, 0x6f, 0xdb, 0x15, 0x5a, 0x21, 0x31, 0x7a, 0xd0, 0xf2, 0x54, 0x15, 0x88, 0xd3, 0x0f, 0x7f, 0x14, 0x5a, 0x14, 0x97, 0xab, 0xf4, 0x58, 0x6a, 0x9f, 0xea, 0x74, 0xe5, 0x6b, 0x90, 0x59, 0x2b, 0x48, 0xd9, + /* (2^154)P */ 0x12, 0x24, 0x04, 0xf5, 0x50, 0xc2, 0x8c, 0xb0, 0x7c, 0x46, 0x98, 0xd5, 0x24, 0xad, 0xf6, 0x72, 0xdc, 0x82, 0x1a, 0x60, 0xc1, 0xeb, 0x48, 0xef, 0x7f, 0x6e, 0xe6, 0xcc, 0xdb, 0x7b, 0xae, 0xbe, 0x5e, 0x1e, 0x5c, 0xe6, 0x0a, 0x70, 0xdf, 0xa4, 0xa3, 0x85, 0x1b, 0x1b, 0x7f, 0x72, 0xb9, 0x96, 0x6f, 0xdc, 0x03, 0x76, 0x66, 0xfb, 0xa0, 0x33, + /* (2^155)P */ 0x37, 0x40, 0xbb, 0xbc, 0x68, 0x58, 0x86, 0xca, 0xbb, 0xa5, 0x24, 0x76, 0x3d, 0x48, 0xd1, 0xad, 0xb4, 0xa8, 0xcf, 0xc3, 0xb6, 0xa8, 0xba, 0x1a, 0x3a, 0xbe, 0x33, 0x75, 0x04, 0x5c, 0x13, 0x8c, 0x0d, 0x70, 0x8d, 0xa6, 0x4e, 0x2a, 0xeb, 0x17, 0x3c, 0x22, 0xdd, 0x3e, 0x96, 0x40, 0x11, 0x9e, 0x4e, 0xae, 0x3d, 0xf8, 0x91, 0xd7, 0x50, 0xc8, + /* (2^156)P */ 0xd8, 0xca, 0xde, 0x19, 0xcf, 0x00, 0xe4, 0x73, 0x18, 0x7f, 0x9b, 0x9f, 0xf4, 0x5b, 0x49, 0x49, 0x99, 0xdc, 0xa4, 0x46, 0x21, 0xb5, 0xd7, 0x3e, 0xb7, 0x47, 0x1b, 0xa9, 0x9f, 0x4c, 0x69, 0x7d, 0xec, 0x33, 0xd6, 0x1c, 0x51, 0x7f, 0x47, 0x74, 0x7a, 0x6c, 0xf3, 0xd2, 0x2e, 0xbf, 0xdf, 0x6c, 0x9e, 0x77, 0x3b, 0x34, 0xf6, 0x73, 0x80, 0xed, + /* (2^157)P */ 0x16, 0xfb, 0x16, 0xc3, 0xc2, 0x83, 0xe4, 0xf4, 0x03, 0x7f, 0x52, 0xb0, 0x67, 0x51, 0x7b, 0x24, 0x5a, 0x51, 0xd3, 0xb6, 0x4e, 0x59, 0x76, 0xcd, 0x08, 0x7b, 0x1d, 0x7a, 0x9c, 0x65, 0xae, 0xce, 0xaa, 0xd2, 0x1c, 0x85, 0x66, 0x68, 0x06, 0x15, 0xa8, 0x06, 0xe6, 0x16, 0x37, 0xf4, 0x49, 0x9e, 0x0f, 0x50, 0x37, 0xb1, 0xb2, 0x93, 0x70, 0x43, + /* (2^158)P */ 0x18, 0x3a, 0x16, 0xe5, 0x8d, 0xc8, 0x35, 0xd6, 0x7b, 0x09, 0xec, 0x61, 0x5f, 0x5c, 0x2a, 0x19, 0x96, 0x2e, 0xc3, 0xfd, 0xab, 0xe6, 0x23, 0xae, 0xab, 0xc5, 0xcb, 0xb9, 0x7b, 0x2d, 0x34, 0x51, 0xb9, 0x41, 0x9e, 0x7d, 0xca, 0xda, 0x25, 0x45, 0x14, 0xb0, 0xc7, 0x4d, 0x26, 0x2b, 0xfe, 0x43, 0xb0, 0x21, 0x5e, 0xfa, 0xdc, 0x7c, 0xf9, 0x5a, + /* (2^159)P */ 0x94, 0xad, 0x42, 0x17, 0xf5, 0xcd, 0x1c, 0x0d, 0xf6, 0x41, 0xd2, 0x55, 0xbb, 0x50, 0xf1, 0xc6, 0xbc, 0xa6, 0xc5, 0x3a, 0xfd, 0x9b, 0x75, 0x3e, 0xf6, 0x1a, 0xa7, 0xb2, 0x6e, 0x64, 0x12, 0xdc, 0x3c, 0xe5, 0xf6, 0xfc, 0x3b, 0xfa, 0x43, 0x81, 0xd4, 0xa5, 0xee, 0xf5, 0x9c, 0x47, 0x2f, 0xd0, 0x9c, 0xde, 0xa1, 0x48, 0x91, 0x9a, 0x34, 0xc1, + /* (2^160)P */ 0x37, 0x1b, 0xb3, 0x88, 0xc9, 0x98, 0x4e, 0xfb, 0x84, 0x4f, 0x2b, 0x0a, 0xb6, 0x8f, 0x35, 0x15, 0xcd, 0x61, 0x7a, 0x5f, 0x5c, 0xa0, 0xca, 0x23, 0xa0, 0x93, 0x1f, 0xcc, 0x3c, 0x39, 0x3a, 0x24, 0xa7, 0x49, 0xad, 0x8d, 0x59, 0xcc, 0x94, 0x5a, 0x16, 0xf5, 0x70, 0xe8, 0x52, 0x1e, 0xee, 0x20, 0x30, 0x17, 0x7e, 0xf0, 0x4c, 0x93, 0x06, 0x5a, + /* (2^161)P */ 0x81, 0xba, 0x3b, 0xd7, 0x3e, 0xb4, 0x32, 0x3a, 0x22, 0x39, 0x2a, 0xfc, 0x19, 0xd9, 0xd2, 0xf6, 0xc5, 0x79, 0x6c, 0x0e, 0xde, 0xda, 0x01, 0xff, 0x52, 0xfb, 0xb6, 0x95, 0x4e, 0x7a, 0x10, 0xb8, 0x06, 0x86, 0x3c, 0xcd, 0x56, 0xd6, 0x15, 0xbf, 0x6e, 0x3e, 0x4f, 0x35, 0x5e, 0xca, 0xbc, 0xa5, 0x95, 0xa2, 0xdf, 0x2d, 0x1d, 0xaf, 0x59, 0xf9, + /* (2^162)P */ 0x69, 0xe5, 0xe2, 0xfa, 0xc9, 0x7f, 0xdd, 0x09, 0xf5, 0x6b, 0x4e, 0x2e, 0xbe, 0xb4, 0xbf, 0x3e, 0xb2, 0xf2, 0x81, 0x30, 0xe1, 0x07, 0xa8, 0x0d, 0x2b, 0xd2, 0x5a, 0x55, 0xbe, 0x4b, 0x86, 0x5d, 0xb0, 0x5e, 0x7c, 0x8f, 0xc1, 0x3c, 0x81, 0x4c, 0xf7, 0x6d, 0x7d, 0xe6, 0x4f, 0x8a, 0x85, 0xc2, 0x2f, 0x28, 0xef, 0x8c, 0x69, 0xc2, 0xc2, 0x1a, + /* (2^163)P */ 0xd9, 0xe4, 0x0e, 0x1e, 0xc2, 0xf7, 0x2f, 0x9f, 0xa1, 0x40, 0xfe, 0x46, 0x16, 0xaf, 0x2e, 0xd1, 0xec, 0x15, 0x9b, 0x61, 0x92, 0xce, 0xfc, 0x10, 0x43, 0x1d, 0x00, 0xf6, 0xbe, 0x20, 0x80, 0x80, 0x6f, 0x3c, 0x16, 0x94, 0x59, 0xba, 0x03, 0x53, 0x6e, 0xb6, 0xdd, 0x25, 0x7b, 0x86, 0xbf, 0x96, 0xf4, 0x2f, 0xa1, 0x96, 0x8d, 0xf9, 0xb3, 0x29, + /* (2^164)P */ 0x3b, 0x04, 0x60, 0x6e, 0xce, 0xab, 0xd2, 0x63, 0x18, 0x53, 0x88, 0x16, 0x4a, 0x6a, 0xab, 0x72, 0x03, 0x68, 0xa5, 0xd4, 0x0d, 0xb2, 0x82, 0x81, 0x1f, 0x2b, 0x5c, 0x75, 0xe8, 0xd2, 0x1d, 0x7f, 0xe7, 0x1b, 0x35, 0x02, 0xde, 0xec, 0xbd, 0xcb, 0xc7, 0x01, 0xd3, 0x95, 0x61, 0xfe, 0xb2, 0x7a, 0x66, 0x09, 0x4c, 0x6d, 0xfd, 0x39, 0xf7, 0x52, + /* (2^165)P */ 0x42, 0xc1, 0x5f, 0xf8, 0x35, 0x52, 0xc1, 0xfe, 0xc5, 0x11, 0x80, 0x1c, 0x11, 0x46, 0x31, 0x11, 0xbe, 0xd0, 0xc4, 0xb6, 0x07, 0x13, 0x38, 0xa0, 0x8d, 0x65, 0xf0, 0x56, 0x9e, 0x16, 0xbf, 0x9d, 0xcd, 0x51, 0x34, 0xf9, 0x08, 0x48, 0x7b, 0x76, 0x0c, 0x7b, 0x30, 0x07, 0xa8, 0x76, 0xaf, 0xa3, 0x29, 0x38, 0xb0, 0x58, 0xde, 0x72, 0x4b, 0x45, + /* (2^166)P */ 0xd4, 0x16, 0xa7, 0xc0, 0xb4, 0x9f, 0xdf, 0x1a, 0x37, 0xc8, 0x35, 0xed, 0xc5, 0x85, 0x74, 0x64, 0x09, 0x22, 0xef, 0xe9, 0x0c, 0xaf, 0x12, 0x4c, 0x9e, 0xf8, 0x47, 0x56, 0xe0, 0x7f, 0x4e, 0x24, 0x6b, 0x0c, 0xe7, 0xad, 0xc6, 0x47, 0x1d, 0xa4, 0x0d, 0x86, 0x89, 0x65, 0xe8, 0x5f, 0x71, 0xc7, 0xe9, 0xcd, 0xec, 0x6c, 0x62, 0xc7, 0xe3, 0xb3, + /* (2^167)P */ 0xb5, 0xea, 0x86, 0xe3, 0x15, 0x18, 0x3f, 0x6d, 0x7b, 0x05, 0x95, 0x15, 0x53, 0x26, 0x1c, 0xeb, 0xbe, 0x7e, 0x16, 0x42, 0x4b, 0xa2, 0x3d, 0xdd, 0x0e, 0xff, 0xba, 0x67, 0xb5, 0xae, 0x7a, 0x17, 0xde, 0x23, 0xad, 0x14, 0xcc, 0xd7, 0xaf, 0x57, 0x01, 0xe0, 0xdd, 0x48, 0xdd, 0xd7, 0xe3, 0xdf, 0xe9, 0x2d, 0xda, 0x67, 0xa4, 0x9f, 0x29, 0x04, + /* (2^168)P */ 0x16, 0x53, 0xe6, 0x9c, 0x4e, 0xe5, 0x1e, 0x70, 0x81, 0x25, 0x02, 0x9b, 0x47, 0x6d, 0xd2, 0x08, 0x73, 0xbe, 0x0a, 0xf1, 0x7b, 0xeb, 0x24, 0xeb, 0x38, 0x23, 0x5c, 0xb6, 0x3e, 0xce, 0x1e, 0xe3, 0xbc, 0x82, 0x35, 0x1f, 0xaf, 0x3a, 0x3a, 0xe5, 0x4e, 0xc1, 0xca, 0xbf, 0x47, 0xb4, 0xbb, 0xbc, 0x5f, 0xea, 0xc6, 0xca, 0xf3, 0xa0, 0xa2, 0x73, + /* (2^169)P */ 0xef, 0xa4, 0x7a, 0x4e, 0xe4, 0xc7, 0xb6, 0x43, 0x2e, 0xa5, 0xe4, 0xa5, 0xba, 0x1e, 0xa5, 0xfe, 0x9e, 0xce, 0xa9, 0x80, 0x04, 0xcb, 0x4f, 0xd8, 0x74, 0x05, 0x48, 0xfa, 0x99, 0x11, 0x5d, 0x97, 0x3b, 0x07, 0x0d, 0xdd, 0xe6, 0xb1, 0x74, 0x87, 0x1a, 0xd3, 0x26, 0xb7, 0x8f, 0xe1, 0x63, 0x3d, 0xec, 0x53, 0x93, 0xb0, 0x81, 0x78, 0x34, 0xa4, + /* (2^170)P */ 0xe1, 0xe7, 0xd4, 0x58, 0x9d, 0x0e, 0x8b, 0x65, 0x66, 0x37, 0x16, 0x48, 0x6f, 0xaa, 0x42, 0x37, 0x77, 0xad, 0xb1, 0x56, 0x48, 0xdf, 0x65, 0x36, 0x30, 0xb8, 0x00, 0x12, 0xd8, 0x32, 0x28, 0x7f, 0xc1, 0x71, 0xeb, 0x93, 0x0f, 0x48, 0x04, 0xe1, 0x5a, 0x6a, 0x96, 0xc1, 0xca, 0x89, 0x6d, 0x1b, 0x82, 0x4c, 0x18, 0x6d, 0x55, 0x4b, 0xea, 0xfd, + /* (2^171)P */ 0x62, 0x1a, 0x53, 0xb4, 0xb1, 0xbe, 0x6f, 0x15, 0x18, 0x88, 0xd4, 0x66, 0x61, 0xc7, 0x12, 0x69, 0x02, 0xbd, 0x03, 0x23, 0x2b, 0xef, 0xf9, 0x54, 0xa4, 0x85, 0xa8, 0xe3, 0xb7, 0xbd, 0xa9, 0xa3, 0xf3, 0x2a, 0xdd, 0xf1, 0xd4, 0x03, 0x0f, 0xa9, 0xa1, 0xd8, 0xa3, 0xcd, 0xb2, 0x71, 0x90, 0x4b, 0x35, 0x62, 0xf2, 0x2f, 0xce, 0x67, 0x1f, 0xaa, + /* (2^172)P */ 0x9e, 0x1e, 0xcd, 0x43, 0x7e, 0x87, 0x37, 0x94, 0x3a, 0x97, 0x4c, 0x7e, 0xee, 0xc9, 0x37, 0x85, 0xf1, 0xd9, 0x4f, 0xbf, 0xf9, 0x6f, 0x39, 0x9a, 0x39, 0x87, 0x2e, 0x25, 0x84, 0x42, 0xc3, 0x80, 0xcb, 0x07, 0x22, 0xae, 0x30, 0xd5, 0x50, 0xa1, 0x23, 0xcc, 0x31, 0x81, 0x9d, 0xf1, 0x30, 0xd9, 0x2b, 0x73, 0x41, 0x16, 0x50, 0xab, 0x2d, 0xa2, + /* (2^173)P */ 0xa4, 0x69, 0x4f, 0xa1, 0x4e, 0xb9, 0xbf, 0x14, 0xe8, 0x2b, 0x04, 0x93, 0xb7, 0x6e, 0x9f, 0x7d, 0x73, 0x0a, 0xc5, 0x14, 0xb8, 0xde, 0x8c, 0xc1, 0xfe, 0xc0, 0xa7, 0xa4, 0xcc, 0x42, 0x42, 0x81, 0x15, 0x65, 0x8a, 0x80, 0xb9, 0xde, 0x1f, 0x60, 0x33, 0x0e, 0xcb, 0xfc, 0xe0, 0xdb, 0x83, 0xa1, 0xe5, 0xd0, 0x16, 0x86, 0x2c, 0xe2, 0x87, 0xed, + /* (2^174)P */ 0x7a, 0xc0, 0xeb, 0x6b, 0xf6, 0x0d, 0x4c, 0x6d, 0x1e, 0xdb, 0xab, 0xe7, 0x19, 0x45, 0xc6, 0xe3, 0xb2, 0x06, 0xbb, 0xbc, 0x70, 0x99, 0x83, 0x33, 0xeb, 0x28, 0xc8, 0x77, 0xf6, 0x4d, 0x01, 0xb7, 0x59, 0xa0, 0xd2, 0xb3, 0x2a, 0x72, 0x30, 0xe7, 0x11, 0x39, 0xb6, 0x41, 0x29, 0x65, 0x5a, 0x14, 0xb9, 0x86, 0x08, 0xe0, 0x7d, 0x32, 0x8c, 0xf0, + /* (2^175)P */ 0x5c, 0x11, 0x30, 0x9e, 0x05, 0x27, 0xf5, 0x45, 0x0f, 0xb3, 0xc9, 0x75, 0xc3, 0xd7, 0xe1, 0x82, 0x3b, 0x8e, 0x87, 0x23, 0x00, 0x15, 0x19, 0x07, 0xd9, 0x21, 0x53, 0xc7, 0xf1, 0xa3, 0xbf, 0x70, 0x64, 0x15, 0x18, 0xca, 0x23, 0x9e, 0xd3, 0x08, 0xc3, 0x2a, 0x8b, 0xe5, 0x83, 0x04, 0x89, 0x14, 0xfd, 0x28, 0x25, 0x1c, 0xe3, 0x26, 0xa7, 0x22, + /* (2^176)P */ 0xdc, 0xd4, 0x75, 0x60, 0x99, 0x94, 0xea, 0x09, 0x8e, 0x8a, 0x3c, 0x1b, 0xf9, 0xbd, 0x33, 0x0d, 0x51, 0x3d, 0x12, 0x6f, 0x4e, 0x72, 0xe0, 0x17, 0x20, 0xe9, 0x75, 0xe6, 0x3a, 0xb2, 0x13, 0x83, 0x4e, 0x7a, 0x08, 0x9e, 0xd1, 0x04, 0x5f, 0x6b, 0x42, 0x0b, 0x76, 0x2a, 0x2d, 0x77, 0x53, 0x6c, 0x65, 0x6d, 0x8e, 0x25, 0x3c, 0xb6, 0x8b, 0x69, + /* (2^177)P */ 0xb9, 0x49, 0x28, 0xd0, 0xdc, 0x6c, 0x8f, 0x4c, 0xc9, 0x14, 0x8a, 0x38, 0xa3, 0xcb, 0xc4, 0x9d, 0x53, 0xcf, 0xe9, 0xe3, 0xcf, 0xe0, 0xb1, 0xf2, 0x1b, 0x4c, 0x7f, 0x83, 0x2a, 0x7a, 0xe9, 0x8b, 0x3b, 0x86, 0x61, 0x30, 0xe9, 0x99, 0xbd, 0xba, 0x19, 0x6e, 0x65, 0x2a, 0x12, 0x3e, 0x9c, 0xa8, 0xaf, 0xc3, 0xcf, 0xf8, 0x1f, 0x77, 0x86, 0xea, + /* (2^178)P */ 0x30, 0xde, 0xe7, 0xff, 0x54, 0xf7, 0xa2, 0x59, 0xf6, 0x0b, 0xfb, 0x7a, 0xf2, 0x39, 0xf0, 0xdb, 0x39, 0xbc, 0xf0, 0xfa, 0x60, 0xeb, 0x6b, 0x4f, 0x47, 0x17, 0xc8, 0x00, 0x65, 0x6d, 0x25, 0x1c, 0xd0, 0x48, 0x56, 0x53, 0x45, 0x11, 0x30, 0x02, 0x49, 0x20, 0x27, 0xac, 0xf2, 0x4c, 0xac, 0x64, 0x3d, 0x52, 0xb8, 0x89, 0xe0, 0x93, 0x16, 0x0f, + /* (2^179)P */ 0x84, 0x09, 0xba, 0x40, 0xb2, 0x2f, 0xa3, 0xa8, 0xc2, 0xba, 0x46, 0x33, 0x05, 0x9d, 0x62, 0xad, 0xa1, 0x3c, 0x33, 0xef, 0x0d, 0xeb, 0xf0, 0x77, 0x11, 0x5a, 0xb0, 0x21, 0x9c, 0xdf, 0x55, 0x24, 0x25, 0x35, 0x51, 0x61, 0x92, 0xf0, 0xb1, 0xce, 0xf5, 0xd4, 0x7b, 0x6c, 0x21, 0x9d, 0x56, 0x52, 0xf8, 0xa1, 0x4c, 0xe9, 0x27, 0x55, 0xac, 0x91, + /* (2^180)P */ 0x03, 0x3e, 0x30, 0xd2, 0x0a, 0xfa, 0x7d, 0x82, 0x3d, 0x1f, 0x8b, 0xcb, 0xb6, 0x04, 0x5c, 0xcc, 0x8b, 0xda, 0xe2, 0x68, 0x74, 0x08, 0x8c, 0x44, 0x83, 0x57, 0x6d, 0x6f, 0x80, 0xb0, 0x7e, 0xa9, 0x82, 0x91, 0x7b, 0x4c, 0x37, 0x97, 0xd1, 0x63, 0xd1, 0xbd, 0x45, 0xe6, 0x8a, 0x86, 0xd6, 0x89, 0x54, 0xfd, 0xd2, 0xb1, 0xd7, 0x54, 0xad, 0xaf, + /* (2^181)P */ 0x8b, 0x33, 0x62, 0x49, 0x9f, 0x63, 0xf9, 0x87, 0x42, 0x58, 0xbf, 0xb3, 0xe6, 0x68, 0x02, 0x60, 0x5c, 0x76, 0x62, 0xf7, 0x61, 0xd7, 0x36, 0x31, 0xf7, 0x9c, 0xb5, 0xe5, 0x13, 0x6c, 0xea, 0x78, 0xae, 0xcf, 0xde, 0xbf, 0xb6, 0xeb, 0x4f, 0xc8, 0x2a, 0xb4, 0x9a, 0x9f, 0xf3, 0xd1, 0x6a, 0xec, 0x0c, 0xbd, 0x85, 0x98, 0x40, 0x06, 0x1c, 0x2a, + /* (2^182)P */ 0x74, 0x3b, 0xe7, 0x81, 0xd5, 0xae, 0x54, 0x56, 0x03, 0xe8, 0x97, 0x16, 0x76, 0xcf, 0x24, 0x96, 0x96, 0x5b, 0xcc, 0x09, 0xab, 0x23, 0x6f, 0x54, 0xae, 0x8f, 0xe4, 0x12, 0xcb, 0xfd, 0xbc, 0xac, 0x93, 0x45, 0x3d, 0x68, 0x08, 0x22, 0x59, 0xc6, 0xf0, 0x47, 0x19, 0x8c, 0x79, 0x93, 0x1e, 0x0e, 0x30, 0xb0, 0x94, 0xfb, 0x17, 0x1d, 0x5a, 0x12, + /* (2^183)P */ 0x85, 0xff, 0x40, 0x18, 0x85, 0xff, 0x44, 0x37, 0x69, 0x23, 0x4d, 0x34, 0xe1, 0xeb, 0xa3, 0x1b, 0x55, 0x40, 0xc1, 0x64, 0xf4, 0xd4, 0x13, 0x0a, 0x9f, 0xb9, 0x19, 0xfc, 0x88, 0x7d, 0xc0, 0x72, 0xcf, 0x69, 0x2f, 0xd2, 0x0c, 0x82, 0x0f, 0xda, 0x08, 0xba, 0x0f, 0xaa, 0x3b, 0xe9, 0xe5, 0x83, 0x7a, 0x06, 0xe8, 0x1b, 0x38, 0x43, 0xc3, 0x54, + /* (2^184)P */ 0x14, 0xaa, 0xb3, 0x6e, 0xe6, 0x28, 0xee, 0xc5, 0x22, 0x6c, 0x7c, 0xf9, 0xa8, 0x71, 0xcc, 0xfe, 0x68, 0x7e, 0xd3, 0xb8, 0x37, 0x96, 0xca, 0x0b, 0xd9, 0xb6, 0x06, 0xa9, 0xf6, 0x71, 0xe8, 0x31, 0xf7, 0xd8, 0xf1, 0x5d, 0xab, 0xb9, 0xf0, 0x5c, 0x98, 0xcf, 0x22, 0xa2, 0x2a, 0xf6, 0xd0, 0x59, 0xf0, 0x9d, 0xd9, 0x6a, 0x4f, 0x59, 0x57, 0xad, + /* (2^185)P */ 0xd7, 0x2b, 0x3d, 0x38, 0x4c, 0x2e, 0x23, 0x4d, 0x49, 0xa2, 0x62, 0x62, 0xf9, 0x0f, 0xde, 0x08, 0xf3, 0x86, 0x71, 0xb6, 0xc7, 0xf9, 0x85, 0x9c, 0x33, 0xa1, 0xcf, 0x16, 0xaa, 0x60, 0xb9, 0xb7, 0xea, 0xed, 0x01, 0x1c, 0x59, 0xdb, 0x3f, 0x3f, 0x97, 0x2e, 0xf0, 0x09, 0x9f, 0x10, 0x85, 0x5f, 0x53, 0x39, 0xf3, 0x13, 0x40, 0x56, 0x95, 0xf9, + /* (2^186)P */ 0xb4, 0xe3, 0xda, 0xc6, 0x1f, 0x78, 0x8e, 0xac, 0xd4, 0x20, 0x1d, 0xa0, 0xbf, 0x4c, 0x09, 0x16, 0xa7, 0x30, 0xb5, 0x8d, 0x9e, 0xa1, 0x5f, 0x6d, 0x52, 0xf4, 0x71, 0xb6, 0x32, 0x2d, 0x21, 0x51, 0xc6, 0xfc, 0x2f, 0x08, 0xf4, 0x13, 0x6c, 0x55, 0xba, 0x72, 0x81, 0x24, 0x49, 0x0e, 0x4f, 0x06, 0x36, 0x39, 0x6a, 0xc5, 0x81, 0xfc, 0xeb, 0xb2, + /* (2^187)P */ 0x7d, 0x8d, 0xc8, 0x6c, 0xea, 0xb4, 0xb9, 0xe8, 0x40, 0xc9, 0x69, 0xc9, 0x30, 0x05, 0xfd, 0x34, 0x46, 0xfd, 0x94, 0x05, 0x16, 0xf5, 0x4b, 0x13, 0x3d, 0x24, 0x1a, 0xd6, 0x64, 0x2b, 0x9c, 0xe2, 0xa5, 0xd9, 0x98, 0xe0, 0xe8, 0xf4, 0xbc, 0x2c, 0xbd, 0xa2, 0x56, 0xe3, 0x9e, 0x14, 0xdb, 0xbf, 0x05, 0xbf, 0x9a, 0x13, 0x5d, 0xf7, 0x91, 0xa3, + /* (2^188)P */ 0x8b, 0xcb, 0x27, 0xf3, 0x15, 0x26, 0x05, 0x40, 0x0f, 0xa6, 0x15, 0x13, 0x71, 0x95, 0xa2, 0xc6, 0x38, 0x04, 0x67, 0xf8, 0x9a, 0x83, 0x06, 0xaa, 0x25, 0x36, 0x72, 0x01, 0x6f, 0x74, 0x5f, 0xe5, 0x6e, 0x44, 0x99, 0xce, 0x13, 0xbc, 0x82, 0xc2, 0x0d, 0xa4, 0x98, 0x50, 0x38, 0xf3, 0xa2, 0xc5, 0xe5, 0x24, 0x1f, 0x6f, 0x56, 0x3e, 0x07, 0xb2, + /* (2^189)P */ 0xbd, 0x0f, 0x32, 0x60, 0x07, 0xb1, 0xd7, 0x0b, 0x11, 0x07, 0x57, 0x02, 0x89, 0xe8, 0x8b, 0xe8, 0x5a, 0x1f, 0xee, 0x54, 0x6b, 0xff, 0xb3, 0x04, 0x07, 0x57, 0x13, 0x0b, 0x94, 0xa8, 0x4d, 0x81, 0xe2, 0x17, 0x16, 0x45, 0xd4, 0x4b, 0xf7, 0x7e, 0x64, 0x66, 0x20, 0xe8, 0x0b, 0x26, 0xfd, 0xa9, 0x8a, 0x47, 0x52, 0x89, 0x14, 0xd0, 0xd1, 0xa1, + /* (2^190)P */ 0xdc, 0x03, 0xe6, 0x20, 0x44, 0x47, 0x8f, 0x04, 0x16, 0x24, 0x22, 0xc1, 0x55, 0x5c, 0xbe, 0x43, 0xc3, 0x92, 0xc5, 0x54, 0x3d, 0x5d, 0xd1, 0x05, 0x9c, 0xc6, 0x7c, 0xbf, 0x23, 0x84, 0x1a, 0xba, 0x4f, 0x1f, 0xfc, 0xa1, 0xae, 0x1a, 0x64, 0x02, 0x51, 0xf1, 0xcb, 0x7a, 0x20, 0xce, 0xb2, 0x34, 0x3c, 0xca, 0xe0, 0xe4, 0xba, 0x22, 0xd4, 0x7b, + /* (2^191)P */ 0xca, 0xfd, 0xca, 0xd7, 0xde, 0x61, 0xae, 0xf0, 0x79, 0x0c, 0x20, 0xab, 0xbc, 0x6f, 0x4d, 0x61, 0xf0, 0xc7, 0x9c, 0x8d, 0x4b, 0x52, 0xf3, 0xb9, 0x48, 0x63, 0x0b, 0xb6, 0xd2, 0x25, 0x9a, 0x96, 0x72, 0xc1, 0x6b, 0x0c, 0xb5, 0xfb, 0x71, 0xaa, 0xad, 0x47, 0x5b, 0xe7, 0xc0, 0x0a, 0x55, 0xb2, 0xd4, 0x16, 0x2f, 0xb1, 0x01, 0xfd, 0xce, 0x27, + /* (2^192)P */ 0x64, 0x11, 0x4b, 0xab, 0x57, 0x09, 0xc6, 0x49, 0x4a, 0x37, 0xc3, 0x36, 0xc4, 0x7b, 0x81, 0x1f, 0x42, 0xed, 0xbb, 0xe0, 0xa0, 0x8d, 0x51, 0xe6, 0xca, 0x8b, 0xb9, 0xcd, 0x99, 0x2d, 0x91, 0x53, 0xa9, 0x47, 0xcb, 0x32, 0xc7, 0xa4, 0x92, 0xec, 0x46, 0x74, 0x44, 0x6d, 0x71, 0x9f, 0x6d, 0x0c, 0x69, 0xa4, 0xf8, 0xbe, 0x9f, 0x7f, 0xa0, 0xd7, + /* (2^193)P */ 0x5f, 0x33, 0xb6, 0x91, 0xc8, 0xa5, 0x3f, 0x5d, 0x7f, 0x38, 0x6e, 0x74, 0x20, 0x4a, 0xd6, 0x2b, 0x98, 0x2a, 0x41, 0x4b, 0x83, 0x64, 0x0b, 0x92, 0x7a, 0x06, 0x1e, 0xc6, 0x2c, 0xf6, 0xe4, 0x91, 0xe5, 0xb1, 0x2e, 0x6e, 0x4e, 0xa8, 0xc8, 0x14, 0x32, 0x57, 0x44, 0x1c, 0xe4, 0xb9, 0x7f, 0x54, 0x51, 0x08, 0x81, 0xaa, 0x4e, 0xce, 0xa1, 0x5d, + /* (2^194)P */ 0x5c, 0xd5, 0x9b, 0x5e, 0x7c, 0xb5, 0xb1, 0x52, 0x73, 0x00, 0x41, 0x56, 0x79, 0x08, 0x7e, 0x07, 0x28, 0x06, 0xa6, 0xfb, 0x7f, 0x69, 0xbd, 0x7a, 0x3c, 0xae, 0x9f, 0x39, 0xbb, 0x54, 0xa2, 0x79, 0xb9, 0x0e, 0x7f, 0xbb, 0xe0, 0xe6, 0xb7, 0x27, 0x64, 0x38, 0x45, 0xdb, 0x84, 0xe4, 0x61, 0x72, 0x3f, 0xe2, 0x24, 0xfe, 0x7a, 0x31, 0x9a, 0xc9, + /* (2^195)P */ 0xa1, 0xd2, 0xa4, 0xee, 0x24, 0x96, 0xe5, 0x5b, 0x79, 0x78, 0x3c, 0x7b, 0x82, 0x3b, 0x8b, 0x58, 0x0b, 0xa3, 0x63, 0x2d, 0xbc, 0x75, 0x46, 0xe8, 0x83, 0x1a, 0xc0, 0x2a, 0x92, 0x61, 0xa8, 0x75, 0x37, 0x3c, 0xbf, 0x0f, 0xef, 0x8f, 0x6c, 0x97, 0x75, 0x10, 0x05, 0x7a, 0xde, 0x23, 0xe8, 0x2a, 0x35, 0xeb, 0x41, 0x64, 0x7d, 0xcf, 0xe0, 0x52, + /* (2^196)P */ 0x4a, 0xd0, 0x49, 0x93, 0xae, 0xf3, 0x24, 0x8c, 0xe1, 0x09, 0x98, 0x45, 0xd8, 0xb9, 0xfe, 0x8e, 0x8c, 0xa8, 0x2c, 0xc9, 0x9f, 0xce, 0x01, 0xdc, 0x38, 0x11, 0xab, 0x85, 0xb9, 0xe8, 0x00, 0x51, 0xfd, 0x82, 0xe1, 0x9b, 0x4e, 0xfc, 0xb5, 0x2a, 0x0f, 0x8b, 0xda, 0x4e, 0x02, 0xca, 0xcc, 0xe3, 0x91, 0xc4, 0xe0, 0xcf, 0x7b, 0xd6, 0xe6, 0x6a, + /* (2^197)P */ 0xfe, 0x11, 0xd7, 0xaa, 0xe3, 0x0c, 0x52, 0x2e, 0x04, 0xe0, 0xe0, 0x61, 0xc8, 0x05, 0xd7, 0x31, 0x4c, 0xc3, 0x9b, 0x2d, 0xce, 0x59, 0xbe, 0x12, 0xb7, 0x30, 0x21, 0xfc, 0x81, 0xb8, 0x5e, 0x57, 0x73, 0xd0, 0xad, 0x8e, 0x9e, 0xe4, 0xeb, 0xcd, 0xcf, 0xd2, 0x0f, 0x01, 0x35, 0x16, 0xed, 0x7a, 0x43, 0x8e, 0x42, 0xdc, 0xea, 0x4c, 0xa8, 0x7c, + /* (2^198)P */ 0x37, 0x26, 0xcc, 0x76, 0x0b, 0xe5, 0x76, 0xdd, 0x3e, 0x19, 0x3c, 0xc4, 0x6c, 0x7f, 0xd0, 0x03, 0xc1, 0xb8, 0x59, 0x82, 0xca, 0x36, 0xc1, 0xe4, 0xc8, 0xb2, 0x83, 0x69, 0x9c, 0xc5, 0x9d, 0x12, 0x82, 0x1c, 0xea, 0xb2, 0x84, 0x9f, 0xf3, 0x52, 0x6b, 0xbb, 0xd8, 0x81, 0x56, 0x83, 0x04, 0x66, 0x05, 0x22, 0x49, 0x37, 0x93, 0xb1, 0xfd, 0xd5, + /* (2^199)P */ 0xaf, 0x96, 0xbf, 0x03, 0xbe, 0xe6, 0x5d, 0x78, 0x19, 0xba, 0x37, 0x46, 0x0a, 0x2b, 0x52, 0x7c, 0xd8, 0x51, 0x9e, 0x3d, 0x29, 0x42, 0xdb, 0x0e, 0x31, 0x20, 0x94, 0xf8, 0x43, 0x9a, 0x2d, 0x22, 0xd3, 0xe3, 0xa1, 0x79, 0x68, 0xfb, 0x2d, 0x7e, 0xd6, 0x79, 0xda, 0x0b, 0xc6, 0x5b, 0x76, 0x68, 0xf0, 0xfe, 0x72, 0x59, 0xbb, 0xa1, 0x9c, 0x74, + /* (2^200)P */ 0x0a, 0xd9, 0xec, 0xc5, 0xbd, 0xf0, 0xda, 0xcf, 0x82, 0xab, 0x46, 0xc5, 0x32, 0x13, 0xdc, 0x5b, 0xac, 0xc3, 0x53, 0x9a, 0x7f, 0xef, 0xa5, 0x40, 0x5a, 0x1f, 0xc1, 0x12, 0x91, 0x54, 0x83, 0x6a, 0xb0, 0x9a, 0x85, 0x4d, 0xbf, 0x36, 0x8e, 0xd3, 0xa2, 0x2b, 0xe5, 0xd6, 0xc6, 0xe1, 0x58, 0x5b, 0x82, 0x9b, 0xc8, 0xf2, 0x03, 0xba, 0xf5, 0x92, + /* (2^201)P */ 0xfb, 0x21, 0x7e, 0xde, 0xe7, 0xb4, 0xc0, 0x56, 0x86, 0x3a, 0x5b, 0x78, 0xf8, 0xf0, 0xf4, 0xe7, 0x5c, 0x00, 0xd2, 0xd7, 0xd6, 0xf8, 0x75, 0x5e, 0x0f, 0x3e, 0xd1, 0x4b, 0x77, 0xd8, 0xad, 0xb0, 0xc9, 0x8b, 0x59, 0x7d, 0x30, 0x76, 0x64, 0x7a, 0x76, 0xd9, 0x51, 0x69, 0xfc, 0xbd, 0x8e, 0xb5, 0x55, 0xe0, 0xd2, 0x07, 0x15, 0xa9, 0xf7, 0xa4, + /* (2^202)P */ 0xaa, 0x2d, 0x2f, 0x2b, 0x3c, 0x15, 0xdd, 0xcd, 0xe9, 0x28, 0x82, 0x4f, 0xa2, 0xaa, 0x31, 0x48, 0xcc, 0xfa, 0x07, 0x73, 0x8a, 0x34, 0x74, 0x0d, 0xab, 0x1a, 0xca, 0xd2, 0xbf, 0x3a, 0xdb, 0x1a, 0x5f, 0x50, 0x62, 0xf4, 0x6b, 0x83, 0x38, 0x43, 0x96, 0xee, 0x6b, 0x39, 0x1e, 0xf0, 0x17, 0x80, 0x1e, 0x9b, 0xed, 0x2b, 0x2f, 0xcc, 0x65, 0xf7, + /* (2^203)P */ 0x03, 0xb3, 0x23, 0x9c, 0x0d, 0xd1, 0xeb, 0x7e, 0x34, 0x17, 0x8a, 0x4c, 0xde, 0x54, 0x39, 0xc4, 0x11, 0x82, 0xd3, 0xa4, 0x00, 0x32, 0x95, 0x9c, 0xa6, 0x64, 0x76, 0x6e, 0xd6, 0x53, 0x27, 0xb4, 0x6a, 0x14, 0x8c, 0x54, 0xf6, 0x58, 0x9e, 0x22, 0x4a, 0x55, 0x18, 0x77, 0xd0, 0x08, 0x6b, 0x19, 0x8a, 0xb5, 0xe7, 0x19, 0xb8, 0x60, 0x92, 0xb1, + /* (2^204)P */ 0x66, 0xec, 0xf3, 0x12, 0xde, 0x67, 0x7f, 0xd4, 0x5b, 0xf6, 0x70, 0x64, 0x0a, 0xb5, 0xc2, 0xf9, 0xb3, 0x64, 0xab, 0x56, 0x46, 0xc7, 0x93, 0xc2, 0x8b, 0x2d, 0xd0, 0xd6, 0x39, 0x3b, 0x1f, 0xcd, 0xb3, 0xac, 0xcc, 0x2c, 0x27, 0x6a, 0xbc, 0xb3, 0x4b, 0xa8, 0x3c, 0x69, 0x20, 0xe2, 0x18, 0x35, 0x17, 0xe1, 0x8a, 0xd3, 0x11, 0x74, 0xaa, 0x4d, + /* (2^205)P */ 0x96, 0xc4, 0x16, 0x7e, 0xfd, 0xf5, 0xd0, 0x7d, 0x1f, 0x32, 0x1b, 0xdb, 0xa6, 0xfd, 0x51, 0x75, 0x4d, 0xd7, 0x00, 0xe5, 0x7f, 0x58, 0x5b, 0xeb, 0x4b, 0x6a, 0x78, 0xfe, 0xe5, 0xd6, 0x8f, 0x99, 0x17, 0xca, 0x96, 0x45, 0xf7, 0x52, 0xdf, 0x84, 0x06, 0x77, 0xb9, 0x05, 0x63, 0x5d, 0xe9, 0x91, 0xb1, 0x4b, 0x82, 0x5a, 0xdb, 0xd7, 0xca, 0x69, + /* (2^206)P */ 0x02, 0xd3, 0x38, 0x38, 0x87, 0xea, 0xbd, 0x9f, 0x11, 0xca, 0xf3, 0x21, 0xf1, 0x9b, 0x35, 0x97, 0x98, 0xff, 0x8e, 0x6d, 0x3d, 0xd6, 0xb2, 0xfa, 0x68, 0xcb, 0x7e, 0x62, 0x85, 0xbb, 0xc7, 0x5d, 0xee, 0x32, 0x30, 0x2e, 0x71, 0x96, 0x63, 0x43, 0x98, 0xc4, 0xa7, 0xde, 0x60, 0xb2, 0xd9, 0x43, 0x4a, 0xfa, 0x97, 0x2d, 0x5f, 0x21, 0xd4, 0xfe, + /* (2^207)P */ 0x3b, 0x20, 0x29, 0x07, 0x07, 0xb5, 0x78, 0xc3, 0xc7, 0xab, 0x56, 0xba, 0x40, 0xde, 0x1d, 0xcf, 0xc3, 0x00, 0x56, 0x21, 0x0c, 0xc8, 0x42, 0xd9, 0x0e, 0xcd, 0x02, 0x7c, 0x07, 0xb9, 0x11, 0xd7, 0x96, 0xaf, 0xff, 0xad, 0xc5, 0xba, 0x30, 0x6d, 0x82, 0x3a, 0xbf, 0xef, 0x7b, 0xf7, 0x0a, 0x74, 0xbd, 0x31, 0x0c, 0xe4, 0xec, 0x1a, 0xe5, 0xc5, + /* (2^208)P */ 0xcc, 0xf2, 0x28, 0x16, 0x12, 0xbf, 0xef, 0x85, 0xbc, 0xf7, 0xcb, 0x9f, 0xdb, 0xa8, 0xb2, 0x49, 0x53, 0x48, 0xa8, 0x24, 0xa8, 0x68, 0x8d, 0xbb, 0x21, 0x0a, 0x5a, 0xbd, 0xb2, 0x91, 0x61, 0x47, 0xc4, 0x43, 0x08, 0xa6, 0x19, 0xef, 0x8e, 0x88, 0x39, 0xc6, 0x33, 0x30, 0xf3, 0x0e, 0xc5, 0x92, 0x66, 0xd6, 0xfe, 0xc5, 0x12, 0xd9, 0x4c, 0x2d, + /* (2^209)P */ 0x30, 0x34, 0x07, 0xbf, 0x9c, 0x5a, 0x4e, 0x65, 0xf1, 0x39, 0x35, 0x38, 0xae, 0x7b, 0x55, 0xac, 0x6a, 0x92, 0x24, 0x7e, 0x50, 0xd3, 0xba, 0x78, 0x51, 0xfe, 0x4d, 0x32, 0x05, 0x11, 0xf5, 0x52, 0xf1, 0x31, 0x45, 0x39, 0x98, 0x7b, 0x28, 0x56, 0xc3, 0x5d, 0x4f, 0x07, 0x6f, 0x84, 0xb8, 0x1a, 0x58, 0x0b, 0xc4, 0x7c, 0xc4, 0x8d, 0x32, 0x8e, + /* (2^210)P */ 0x7e, 0xaf, 0x98, 0xce, 0xc5, 0x2b, 0x9d, 0xf6, 0xfa, 0x2c, 0xb6, 0x2a, 0x5a, 0x1d, 0xc0, 0x24, 0x8d, 0xa4, 0xce, 0xb1, 0x12, 0x01, 0xf9, 0x79, 0xc6, 0x79, 0x38, 0x0c, 0xd4, 0x07, 0xc9, 0xf7, 0x37, 0xa1, 0x0b, 0xfe, 0x72, 0xec, 0x5d, 0xd6, 0xb0, 0x1c, 0x70, 0xbe, 0x70, 0x01, 0x13, 0xe0, 0x86, 0x95, 0xc7, 0x2e, 0x12, 0x3b, 0xe6, 0xa6, + /* (2^211)P */ 0x24, 0x82, 0x67, 0xe0, 0x14, 0x7b, 0x56, 0x08, 0x38, 0x44, 0xdb, 0xa0, 0x3a, 0x05, 0x47, 0xb2, 0xc0, 0xac, 0xd1, 0xcc, 0x3f, 0x82, 0xb8, 0x8a, 0x88, 0xbc, 0xf5, 0x33, 0xa1, 0x35, 0x0f, 0xf6, 0xe2, 0xef, 0x6c, 0xf7, 0x37, 0x9e, 0xe8, 0x10, 0xca, 0xb0, 0x8e, 0x80, 0x86, 0x00, 0x23, 0xd0, 0x4a, 0x76, 0x9f, 0xf7, 0x2c, 0x52, 0x15, 0x0e, + /* (2^212)P */ 0x5e, 0x49, 0xe1, 0x2c, 0x9a, 0x01, 0x76, 0xa6, 0xb3, 0x07, 0x5b, 0xa4, 0x07, 0xef, 0x1d, 0xc3, 0x6a, 0xbb, 0x64, 0xbe, 0x71, 0x15, 0x6e, 0x32, 0x31, 0x46, 0x9a, 0x9e, 0x8f, 0x45, 0x73, 0xce, 0x0b, 0x94, 0x1a, 0x52, 0x07, 0xf4, 0x50, 0x30, 0x49, 0x53, 0x50, 0xfb, 0x71, 0x1f, 0x5a, 0x03, 0xa9, 0x76, 0xf2, 0x8f, 0x42, 0xff, 0xed, 0xed, + /* (2^213)P */ 0xed, 0x08, 0xdb, 0x91, 0x1c, 0xee, 0xa2, 0xb4, 0x47, 0xa2, 0xfa, 0xcb, 0x03, 0xd1, 0xff, 0x8c, 0xad, 0x64, 0x50, 0x61, 0xcd, 0xfc, 0x88, 0xa0, 0x31, 0x95, 0x30, 0xb9, 0x58, 0xdd, 0xd7, 0x43, 0xe4, 0x46, 0xc2, 0x16, 0xd9, 0x72, 0x4a, 0x56, 0x51, 0x70, 0x85, 0xf1, 0xa1, 0x80, 0x40, 0xd5, 0xba, 0x67, 0x81, 0xda, 0xcd, 0x03, 0xea, 0x51, + /* (2^214)P */ 0x42, 0x50, 0xf0, 0xef, 0x37, 0x61, 0x72, 0x85, 0xe1, 0xf1, 0xff, 0x6f, 0x3d, 0xe8, 0x7b, 0x21, 0x5c, 0xe5, 0x50, 0x03, 0xde, 0x00, 0xc1, 0xf7, 0x3a, 0x55, 0x12, 0x1c, 0x9e, 0x1e, 0xce, 0xd1, 0x2f, 0xaf, 0x05, 0x70, 0x5b, 0x47, 0xf2, 0x04, 0x7a, 0x89, 0xbc, 0x78, 0xa6, 0x65, 0x6c, 0xaa, 0x3c, 0xa2, 0x3c, 0x8b, 0x5c, 0xa9, 0x22, 0x48, + /* (2^215)P */ 0x7e, 0x8c, 0x8f, 0x2f, 0x60, 0xe3, 0x5a, 0x94, 0xd4, 0xce, 0xdd, 0x9d, 0x83, 0x3b, 0x77, 0x78, 0x43, 0x1d, 0xfd, 0x8f, 0xc8, 0xe8, 0x02, 0x90, 0xab, 0xf6, 0xc9, 0xfc, 0xf1, 0x63, 0xaa, 0x5f, 0x42, 0xf1, 0x78, 0x34, 0x64, 0x16, 0x75, 0x9c, 0x7d, 0xd0, 0xe4, 0x74, 0x5a, 0xa8, 0xfb, 0xcb, 0xac, 0x20, 0xa3, 0xc2, 0xa6, 0x20, 0xf8, 0x1b, + /* (2^216)P */ 0x00, 0x4f, 0x1e, 0x56, 0xb5, 0x34, 0xb2, 0x87, 0x31, 0xe5, 0xee, 0x8d, 0xf1, 0x41, 0x67, 0xb7, 0x67, 0x3a, 0x54, 0x86, 0x5c, 0xf0, 0x0b, 0x37, 0x2f, 0x1b, 0x92, 0x5d, 0x58, 0x93, 0xdc, 0xd8, 0x58, 0xcc, 0x9e, 0x67, 0xd0, 0x97, 0x3a, 0xaf, 0x49, 0x39, 0x2d, 0x3b, 0xd8, 0x98, 0xfb, 0x76, 0x6b, 0xe7, 0xaf, 0xc3, 0x45, 0x44, 0x53, 0x94, + /* (2^217)P */ 0x30, 0xbd, 0x90, 0x75, 0xd3, 0xbd, 0x3b, 0x58, 0x27, 0x14, 0x9f, 0x6b, 0xd4, 0x31, 0x99, 0xcd, 0xde, 0x3a, 0x21, 0x1e, 0xb4, 0x02, 0xe4, 0x33, 0x04, 0x02, 0xb0, 0x50, 0x66, 0x68, 0x90, 0xdd, 0x7b, 0x69, 0x31, 0xd9, 0xcf, 0x68, 0x73, 0xf1, 0x60, 0xdd, 0xc8, 0x1d, 0x5d, 0xe3, 0xd6, 0x5b, 0x2a, 0xa4, 0xea, 0xc4, 0x3f, 0x08, 0xcd, 0x9c, + /* (2^218)P */ 0x6b, 0x1a, 0xbf, 0x55, 0xc1, 0x1b, 0x0c, 0x05, 0x09, 0xdf, 0xf5, 0x5e, 0xa3, 0x77, 0x95, 0xe9, 0xdf, 0x19, 0xdd, 0xc7, 0x94, 0xcb, 0x06, 0x73, 0xd0, 0x88, 0x02, 0x33, 0x94, 0xca, 0x7a, 0x2f, 0x8e, 0x3d, 0x72, 0x61, 0x2d, 0x4d, 0xa6, 0x61, 0x1f, 0x32, 0x5e, 0x87, 0x53, 0x36, 0x11, 0x15, 0x20, 0xb3, 0x5a, 0x57, 0x51, 0x93, 0x20, 0xd8, + /* (2^219)P */ 0xb7, 0x56, 0xf4, 0xab, 0x7d, 0x0c, 0xfb, 0x99, 0x1a, 0x30, 0x29, 0xb0, 0x75, 0x2a, 0xf8, 0x53, 0x71, 0x23, 0xbd, 0xa7, 0xd8, 0x0a, 0xe2, 0x27, 0x65, 0xe9, 0x74, 0x26, 0x98, 0x4a, 0x69, 0x19, 0xb2, 0x4d, 0x0a, 0x17, 0x98, 0xb2, 0xa9, 0x57, 0x4e, 0xf6, 0x86, 0xc8, 0x01, 0xa4, 0xc6, 0x98, 0xad, 0x5a, 0x90, 0x2c, 0x05, 0x46, 0x64, 0xb7, + /* (2^220)P */ 0x7b, 0x91, 0xdf, 0xfc, 0xf8, 0x1c, 0x8c, 0x15, 0x9e, 0xf7, 0xd5, 0xa8, 0xe8, 0xe7, 0xe3, 0xa3, 0xb0, 0x04, 0x74, 0xfa, 0x78, 0xfb, 0x26, 0xbf, 0x67, 0x42, 0xf9, 0x8c, 0x9b, 0xb4, 0x69, 0x5b, 0x02, 0x13, 0x6d, 0x09, 0x6c, 0xd6, 0x99, 0x61, 0x7b, 0x89, 0x4a, 0x67, 0x75, 0xa3, 0x98, 0x13, 0x23, 0x1d, 0x18, 0x24, 0x0e, 0xef, 0x41, 0x79, + /* (2^221)P */ 0x86, 0x33, 0xab, 0x08, 0xcb, 0xbf, 0x1e, 0x76, 0x3c, 0x0b, 0xbd, 0x30, 0xdb, 0xe9, 0xa3, 0x35, 0x87, 0x1b, 0xe9, 0x07, 0x00, 0x66, 0x7f, 0x3b, 0x35, 0x0c, 0x8a, 0x3f, 0x61, 0xbc, 0xe0, 0xae, 0xf6, 0xcc, 0x54, 0xe1, 0x72, 0x36, 0x2d, 0xee, 0x93, 0x24, 0xf8, 0xd7, 0xc5, 0xf9, 0xcb, 0xb0, 0xe5, 0x88, 0x0d, 0x23, 0x4b, 0x76, 0x15, 0xa2, + /* (2^222)P */ 0x37, 0xdb, 0x83, 0xd5, 0x6d, 0x06, 0x24, 0x37, 0x1b, 0x15, 0x85, 0x15, 0xe2, 0xc0, 0x4e, 0x02, 0xa9, 0x6d, 0x0a, 0x3a, 0x94, 0x4a, 0x6f, 0x49, 0x00, 0x01, 0x72, 0xbb, 0x60, 0x14, 0x35, 0xae, 0xb4, 0xc6, 0x01, 0x0a, 0x00, 0x9e, 0xc3, 0x58, 0xc5, 0xd1, 0x5e, 0x30, 0x73, 0x96, 0x24, 0x85, 0x9d, 0xf0, 0xf9, 0xec, 0x09, 0xd3, 0xe7, 0x70, + /* (2^223)P */ 0xf3, 0xbd, 0x96, 0x87, 0xe9, 0x71, 0xbd, 0xd6, 0xa2, 0x45, 0xeb, 0x0a, 0xcd, 0x2c, 0xf1, 0x72, 0xa6, 0x31, 0xa9, 0x6f, 0x09, 0xa1, 0x5e, 0xdd, 0xc8, 0x8d, 0x0d, 0xbc, 0x5a, 0x8d, 0xb1, 0x2c, 0x9a, 0xcc, 0x37, 0x74, 0xc2, 0xa9, 0x4e, 0xd6, 0xc0, 0x3c, 0xa0, 0x23, 0xb0, 0xa0, 0x77, 0x14, 0x80, 0x45, 0x71, 0x6a, 0x2d, 0x41, 0xc3, 0x82, + /* (2^224)P */ 0x37, 0x44, 0xec, 0x8a, 0x3e, 0xc1, 0x0c, 0xa9, 0x12, 0x9c, 0x08, 0x88, 0xcb, 0xd9, 0xf8, 0xba, 0x00, 0xd6, 0xc3, 0xdf, 0xef, 0x7a, 0x44, 0x7e, 0x25, 0x69, 0xc9, 0xc1, 0x46, 0xe5, 0x20, 0x9e, 0xcc, 0x0b, 0x05, 0x3e, 0xf4, 0x78, 0x43, 0x0c, 0xa6, 0x2f, 0xc1, 0xfa, 0x70, 0xb2, 0x3c, 0x31, 0x7a, 0x63, 0x58, 0xab, 0x17, 0xcf, 0x4c, 0x4f, + /* (2^225)P */ 0x2b, 0x08, 0x31, 0x59, 0x75, 0x8b, 0xec, 0x0a, 0xa9, 0x79, 0x70, 0xdd, 0xf1, 0x11, 0xc3, 0x11, 0x1f, 0xab, 0x37, 0xaa, 0x26, 0xea, 0x53, 0xc4, 0x79, 0xa7, 0x91, 0x00, 0xaa, 0x08, 0x42, 0xeb, 0x8b, 0x8b, 0xe8, 0xc3, 0x2f, 0xb8, 0x78, 0x90, 0x38, 0x0e, 0x8a, 0x42, 0x0c, 0x0f, 0xbf, 0x3e, 0xf8, 0xd8, 0x07, 0xcf, 0x6a, 0x34, 0xc9, 0xfa, + /* (2^226)P */ 0x11, 0xe0, 0x76, 0x4d, 0x23, 0xc5, 0xa6, 0xcc, 0x9f, 0x9a, 0x2a, 0xde, 0x3a, 0xb5, 0x92, 0x39, 0x19, 0x8a, 0xf1, 0x8d, 0xf9, 0x4d, 0xc9, 0xb4, 0x39, 0x9f, 0x57, 0xd8, 0x72, 0xab, 0x1d, 0x61, 0x6a, 0xb2, 0xff, 0x52, 0xba, 0x54, 0x0e, 0xfb, 0x83, 0x30, 0x8a, 0xf7, 0x3b, 0xf4, 0xd8, 0xae, 0x1a, 0x94, 0x3a, 0xec, 0x63, 0xfe, 0x6e, 0x7c, + /* (2^227)P */ 0xdc, 0x70, 0x8e, 0x55, 0x44, 0xbf, 0xd2, 0x6a, 0xa0, 0x14, 0x61, 0x89, 0xd5, 0x55, 0x45, 0x3c, 0xf6, 0x40, 0x0d, 0x83, 0x85, 0x44, 0xb4, 0x62, 0x56, 0xfe, 0x60, 0xd7, 0x07, 0x1d, 0x47, 0x30, 0x3b, 0x73, 0xa4, 0xb5, 0xb7, 0xea, 0xac, 0xda, 0xf1, 0x17, 0xaa, 0x60, 0xdf, 0xe9, 0x84, 0xda, 0x31, 0x32, 0x61, 0xbf, 0xd0, 0x7e, 0x8a, 0x02, + /* (2^228)P */ 0xb9, 0x51, 0xb3, 0x89, 0x21, 0x5d, 0xa2, 0xfe, 0x79, 0x2a, 0xb3, 0x2a, 0x3b, 0xe6, 0x6f, 0x2b, 0x22, 0x03, 0xea, 0x7b, 0x1f, 0xaf, 0x85, 0xc3, 0x38, 0x55, 0x5b, 0x8e, 0xb4, 0xaa, 0x77, 0xfe, 0x03, 0x6e, 0xda, 0x91, 0x24, 0x0c, 0x48, 0x39, 0x27, 0x43, 0x16, 0xd2, 0x0a, 0x0d, 0x43, 0xa3, 0x0e, 0xca, 0x45, 0xd1, 0x7f, 0xf5, 0xd3, 0x16, + /* (2^229)P */ 0x3d, 0x32, 0x9b, 0x38, 0xf8, 0x06, 0x93, 0x78, 0x5b, 0x50, 0x2b, 0x06, 0xd8, 0x66, 0xfe, 0xab, 0x9b, 0x58, 0xc7, 0xd1, 0x4d, 0xd5, 0xf8, 0x3b, 0x10, 0x7e, 0x85, 0xde, 0x58, 0x4e, 0xdf, 0x53, 0xd9, 0x58, 0xe0, 0x15, 0x81, 0x9f, 0x1a, 0x78, 0xfc, 0x9f, 0x10, 0xc2, 0x23, 0xd6, 0x78, 0xd1, 0x9d, 0xd2, 0xd5, 0x1c, 0x53, 0xe2, 0xc9, 0x76, + /* (2^230)P */ 0x98, 0x1e, 0x38, 0x7b, 0x71, 0x18, 0x4b, 0x15, 0xaf, 0xa1, 0xa6, 0x98, 0xcb, 0x26, 0xa3, 0xc8, 0x07, 0x46, 0xda, 0x3b, 0x70, 0x65, 0xec, 0x7a, 0x2b, 0x34, 0x94, 0xa8, 0xb6, 0x14, 0xf8, 0x1a, 0xce, 0xf7, 0xc8, 0x60, 0xf3, 0x88, 0xf4, 0x33, 0x60, 0x7b, 0xd1, 0x02, 0xe7, 0xda, 0x00, 0x4a, 0xea, 0xd2, 0xfd, 0x88, 0xd2, 0x99, 0x28, 0xf3, + /* (2^231)P */ 0x28, 0x24, 0x1d, 0x26, 0xc2, 0xeb, 0x8b, 0x3b, 0xb4, 0x6b, 0xbe, 0x6b, 0x77, 0xff, 0xf3, 0x21, 0x3b, 0x26, 0x6a, 0x8c, 0x8e, 0x2a, 0x44, 0xa8, 0x01, 0x2b, 0x71, 0xea, 0x64, 0x30, 0xfd, 0xfd, 0x95, 0xcb, 0x39, 0x38, 0x48, 0xfa, 0x96, 0x97, 0x8c, 0x2f, 0x33, 0xca, 0x03, 0xe6, 0xd7, 0x94, 0x55, 0x6c, 0xc3, 0xb3, 0xa8, 0xf7, 0xae, 0x8c, + /* (2^232)P */ 0xea, 0x62, 0x8a, 0xb4, 0xeb, 0x74, 0xf7, 0xb8, 0xae, 0xc5, 0x20, 0x71, 0x06, 0xd6, 0x7c, 0x62, 0x9b, 0x69, 0x74, 0xef, 0xa7, 0x6d, 0xd6, 0x8c, 0x37, 0xb9, 0xbf, 0xcf, 0xeb, 0xe4, 0x2f, 0x04, 0x02, 0x21, 0x7d, 0x75, 0x6b, 0x92, 0x48, 0xf8, 0x70, 0xad, 0x69, 0xe2, 0xea, 0x0e, 0x88, 0x67, 0x72, 0xcc, 0x2d, 0x10, 0xce, 0x2d, 0xcf, 0x65, + /* (2^233)P */ 0x49, 0xf3, 0x57, 0x64, 0xe5, 0x5c, 0xc5, 0x65, 0x49, 0x97, 0xc4, 0x8a, 0xcc, 0xa9, 0xca, 0x94, 0x7b, 0x86, 0x88, 0xb6, 0x51, 0x27, 0x69, 0xa5, 0x0f, 0x8b, 0x06, 0x59, 0xa0, 0x94, 0xef, 0x63, 0x1a, 0x01, 0x9e, 0x4f, 0xd2, 0x5a, 0x93, 0xc0, 0x7c, 0xe6, 0x61, 0x77, 0xb6, 0xf5, 0x40, 0xd9, 0x98, 0x43, 0x5b, 0x56, 0x68, 0xe9, 0x37, 0x8f, + /* (2^234)P */ 0xee, 0x87, 0xd2, 0x05, 0x1b, 0x39, 0x89, 0x10, 0x07, 0x6d, 0xe8, 0xfd, 0x8b, 0x4d, 0xb2, 0xa7, 0x7b, 0x1e, 0xa0, 0x6c, 0x0d, 0x3d, 0x3d, 0x49, 0xba, 0x61, 0x36, 0x1f, 0xc2, 0x84, 0x4a, 0xcc, 0x87, 0xa9, 0x1b, 0x23, 0x04, 0xe2, 0x3e, 0x97, 0xe1, 0xdb, 0xd5, 0x5a, 0xe8, 0x41, 0x6b, 0xe5, 0x5a, 0xa1, 0x99, 0xe5, 0x7b, 0xa7, 0xe0, 0x3b, + /* (2^235)P */ 0xea, 0xa3, 0x6a, 0xdd, 0x77, 0x7f, 0x77, 0x41, 0xc5, 0x6a, 0xe4, 0xaf, 0x11, 0x5f, 0x88, 0xa5, 0x10, 0xee, 0xd0, 0x8c, 0x0c, 0xb4, 0xa5, 0x2a, 0xd0, 0xd8, 0x1d, 0x47, 0x06, 0xc0, 0xd5, 0xce, 0x51, 0x54, 0x9b, 0x2b, 0xe6, 0x2f, 0xe7, 0xe7, 0x31, 0x5f, 0x5c, 0x23, 0x81, 0x3e, 0x03, 0x93, 0xaa, 0x2d, 0x71, 0x84, 0xa0, 0x89, 0x32, 0xa6, + /* (2^236)P */ 0x55, 0xa3, 0x13, 0x92, 0x4e, 0x93, 0x7d, 0xec, 0xca, 0x57, 0xfb, 0x37, 0xae, 0xd2, 0x18, 0x2e, 0x54, 0x05, 0x6c, 0xd1, 0x28, 0xca, 0x90, 0x40, 0x82, 0x2e, 0x79, 0xc6, 0x5a, 0xc7, 0xdd, 0x84, 0x93, 0xdf, 0x15, 0xb8, 0x1f, 0xb1, 0xf9, 0xaf, 0x2c, 0xe5, 0x32, 0xcd, 0xc2, 0x99, 0x6d, 0xac, 0x85, 0x5c, 0x63, 0xd3, 0xe2, 0xff, 0x24, 0xda, + /* (2^237)P */ 0x2d, 0x8d, 0xfd, 0x65, 0xcc, 0xe5, 0x02, 0xa0, 0xe5, 0xb9, 0xec, 0x59, 0x09, 0x50, 0x27, 0xb7, 0x3d, 0x2a, 0x79, 0xb2, 0x76, 0x5d, 0x64, 0x95, 0xf8, 0xc5, 0xaf, 0x8a, 0x62, 0x11, 0x5c, 0x56, 0x1c, 0x05, 0x64, 0x9e, 0x5e, 0xbd, 0x54, 0x04, 0xe6, 0x9e, 0xab, 0xe6, 0x22, 0x7e, 0x42, 0x54, 0xb5, 0xa5, 0xd0, 0x8d, 0x28, 0x6b, 0x0f, 0x0b, + /* (2^238)P */ 0x2d, 0xb2, 0x8c, 0x59, 0x10, 0x37, 0x84, 0x3b, 0x9b, 0x65, 0x1b, 0x0f, 0x10, 0xf9, 0xea, 0x60, 0x1b, 0x02, 0xf5, 0xee, 0x8b, 0xe6, 0x32, 0x7d, 0x10, 0x7f, 0x5f, 0x8c, 0x72, 0x09, 0x4e, 0x1f, 0x29, 0xff, 0x65, 0xcb, 0x3e, 0x3a, 0xd2, 0x96, 0x50, 0x1e, 0xea, 0x64, 0x99, 0xb5, 0x4c, 0x7a, 0x69, 0xb8, 0x95, 0xae, 0x48, 0xc0, 0x7c, 0xb1, + /* (2^239)P */ 0xcd, 0x7c, 0x4f, 0x3e, 0xea, 0xf3, 0x90, 0xcb, 0x12, 0x76, 0xd1, 0x17, 0xdc, 0x0d, 0x13, 0x0f, 0xfd, 0x4d, 0xb5, 0x1f, 0xe4, 0xdd, 0xf2, 0x4d, 0x58, 0xea, 0xa5, 0x66, 0x92, 0xcf, 0xe5, 0x54, 0xea, 0x9b, 0x35, 0x83, 0x1a, 0x44, 0x8e, 0x62, 0x73, 0x45, 0x98, 0xa3, 0x89, 0x95, 0x52, 0x93, 0x1a, 0x8d, 0x63, 0x0f, 0xc2, 0x57, 0x3c, 0xb1, + /* (2^240)P */ 0x72, 0xb4, 0xdf, 0x51, 0xb7, 0xf6, 0x52, 0xa2, 0x14, 0x56, 0xe5, 0x0a, 0x2e, 0x75, 0x81, 0x02, 0xee, 0x93, 0x48, 0x0a, 0x92, 0x4e, 0x0c, 0x0f, 0xdf, 0x09, 0x89, 0x99, 0xf6, 0xf9, 0x22, 0xa2, 0x32, 0xf8, 0xb0, 0x76, 0x0c, 0xb2, 0x4d, 0x6e, 0xbe, 0x83, 0x35, 0x61, 0x44, 0xd2, 0x58, 0xc7, 0xdd, 0x14, 0xcf, 0xc3, 0x4b, 0x7c, 0x07, 0xee, + /* (2^241)P */ 0x8b, 0x03, 0xee, 0xcb, 0xa7, 0x2e, 0x28, 0xbd, 0x97, 0xd1, 0x4c, 0x2b, 0xd1, 0x92, 0x67, 0x5b, 0x5a, 0x12, 0xbf, 0x29, 0x17, 0xfc, 0x50, 0x09, 0x74, 0x76, 0xa2, 0xd4, 0x82, 0xfd, 0x2c, 0x0c, 0x90, 0xf7, 0xe7, 0xe5, 0x9a, 0x2c, 0x16, 0x40, 0xb9, 0x6c, 0xd9, 0xe0, 0x22, 0x9e, 0xf8, 0xdd, 0x73, 0xe4, 0x7b, 0x9e, 0xbe, 0x4f, 0x66, 0x22, + /* (2^242)P */ 0xa4, 0x10, 0xbe, 0xb8, 0x83, 0x3a, 0x77, 0x8e, 0xea, 0x0a, 0xc4, 0x97, 0x3e, 0xb6, 0x6c, 0x81, 0xd7, 0x65, 0xd9, 0xf7, 0xae, 0xe6, 0xbe, 0xab, 0x59, 0x81, 0x29, 0x4b, 0xff, 0xe1, 0x0f, 0xc3, 0x2b, 0xad, 0x4b, 0xef, 0xc4, 0x50, 0x9f, 0x88, 0x31, 0xf2, 0xde, 0x80, 0xd6, 0xf4, 0x20, 0x9c, 0x77, 0x9b, 0xbe, 0xbe, 0x08, 0xf5, 0xf0, 0x95, + /* (2^243)P */ 0x0e, 0x7c, 0x7b, 0x7c, 0xb3, 0xd8, 0x83, 0xfc, 0x8c, 0x75, 0x51, 0x74, 0x1b, 0xe1, 0x6d, 0x11, 0x05, 0x46, 0x24, 0x0d, 0xa4, 0x2b, 0x32, 0xfd, 0x2c, 0x4e, 0x21, 0xdf, 0x39, 0x6b, 0x96, 0xfc, 0xff, 0x92, 0xfc, 0x35, 0x0d, 0x9a, 0x4b, 0xc0, 0x70, 0x46, 0x32, 0x7d, 0xc0, 0xc4, 0x04, 0xe0, 0x2d, 0x83, 0xa7, 0x00, 0xc7, 0xcb, 0xb4, 0x8f, + /* (2^244)P */ 0xa9, 0x5a, 0x7f, 0x0e, 0xdd, 0x2c, 0x85, 0xaa, 0x4d, 0xac, 0xde, 0xb3, 0xb6, 0xaf, 0xe6, 0xd1, 0x06, 0x7b, 0x2c, 0xa4, 0x01, 0x19, 0x22, 0x7d, 0x78, 0xf0, 0x3a, 0xea, 0x89, 0xfe, 0x21, 0x61, 0x6d, 0xb8, 0xfe, 0xa5, 0x2a, 0xab, 0x0d, 0x7b, 0x51, 0x39, 0xb6, 0xde, 0xbc, 0xf0, 0xc5, 0x48, 0xd7, 0x09, 0x82, 0x6e, 0x66, 0x75, 0xc5, 0xcd, + /* (2^245)P */ 0xee, 0xdf, 0x2b, 0x6c, 0xa8, 0xde, 0x61, 0xe1, 0x27, 0xfa, 0x2a, 0x0f, 0x68, 0xe7, 0x7a, 0x9b, 0x13, 0xe9, 0x56, 0xd2, 0x1c, 0x3d, 0x2f, 0x3c, 0x7a, 0xf6, 0x6f, 0x45, 0xee, 0xe8, 0xf4, 0xa0, 0xa6, 0xe8, 0xa5, 0x27, 0xee, 0xf2, 0x85, 0xa9, 0xd5, 0x0e, 0xa9, 0x26, 0x60, 0xfe, 0xee, 0xc7, 0x59, 0x99, 0x5e, 0xa3, 0xdf, 0x23, 0x36, 0xd5, + /* (2^246)P */ 0x15, 0x66, 0x6f, 0xd5, 0x78, 0xa4, 0x0a, 0xf7, 0xb1, 0xe8, 0x75, 0x6b, 0x48, 0x7d, 0xa6, 0x4d, 0x3d, 0x36, 0x9b, 0xc7, 0xcc, 0x68, 0x9a, 0xfe, 0x2f, 0x39, 0x2a, 0x51, 0x31, 0x39, 0x7d, 0x73, 0x6f, 0xc8, 0x74, 0x72, 0x6f, 0x6e, 0xda, 0x5f, 0xad, 0x48, 0xc8, 0x40, 0xe1, 0x06, 0x01, 0x36, 0xa1, 0x88, 0xc8, 0x99, 0x9c, 0xd1, 0x11, 0x8f, + /* (2^247)P */ 0xab, 0xc5, 0xcb, 0xcf, 0xbd, 0x73, 0x21, 0xd0, 0x82, 0xb1, 0x2e, 0x2d, 0xd4, 0x36, 0x1b, 0xed, 0xa9, 0x8a, 0x26, 0x79, 0xc4, 0x17, 0xae, 0xe5, 0x09, 0x0a, 0x0c, 0xa4, 0x21, 0xa0, 0x6e, 0xdd, 0x62, 0x8e, 0x44, 0x62, 0xcc, 0x50, 0xff, 0x93, 0xb3, 0x9a, 0x72, 0x8c, 0x3f, 0xa1, 0xa6, 0x4d, 0x87, 0xd5, 0x1c, 0x5a, 0xc0, 0x0b, 0x1a, 0xd6, + /* (2^248)P */ 0x67, 0x36, 0x6a, 0x1f, 0x96, 0xe5, 0x80, 0x20, 0xa9, 0xe8, 0x0b, 0x0e, 0x21, 0x29, 0x3f, 0xc8, 0x0a, 0x6d, 0x27, 0x47, 0xca, 0xd9, 0x05, 0x55, 0xbf, 0x11, 0xcf, 0x31, 0x7a, 0x37, 0xc7, 0x90, 0xa9, 0xf4, 0x07, 0x5e, 0xd5, 0xc3, 0x92, 0xaa, 0x95, 0xc8, 0x23, 0x2a, 0x53, 0x45, 0xe3, 0x3a, 0x24, 0xe9, 0x67, 0x97, 0x3a, 0x82, 0xf9, 0xa6, + /* (2^249)P */ 0x92, 0x9e, 0x6d, 0x82, 0x67, 0xe9, 0xf9, 0x17, 0x96, 0x2c, 0xa7, 0xd3, 0x89, 0xf9, 0xdb, 0xd8, 0x20, 0xc6, 0x2e, 0xec, 0x4a, 0x76, 0x64, 0xbf, 0x27, 0x40, 0xe2, 0xb4, 0xdf, 0x1f, 0xa0, 0xef, 0x07, 0x80, 0xfb, 0x8e, 0x12, 0xf8, 0xb8, 0xe1, 0xc6, 0xdf, 0x7c, 0x69, 0x35, 0x5a, 0xe1, 0x8e, 0x5d, 0x69, 0x84, 0x56, 0xb6, 0x31, 0x1c, 0x0b, + /* (2^250)P */ 0xd6, 0x94, 0x5c, 0xef, 0xbb, 0x46, 0x45, 0x44, 0x5b, 0xa1, 0xae, 0x03, 0x65, 0xdd, 0xb5, 0x66, 0x88, 0x35, 0x29, 0x95, 0x16, 0x54, 0xa6, 0xf5, 0xc9, 0x78, 0x34, 0xe6, 0x0f, 0xc4, 0x2b, 0x5b, 0x79, 0x51, 0x68, 0x48, 0x3a, 0x26, 0x87, 0x05, 0x70, 0xaf, 0x8b, 0xa6, 0xc7, 0x2e, 0xb3, 0xa9, 0x10, 0x01, 0xb0, 0xb9, 0x31, 0xfd, 0xdc, 0x80, + /* (2^251)P */ 0x25, 0xf2, 0xad, 0xd6, 0x75, 0xa3, 0x04, 0x05, 0x64, 0x8a, 0x97, 0x60, 0x27, 0x2a, 0xe5, 0x6d, 0xb0, 0x73, 0xf4, 0x07, 0x2a, 0x9d, 0xe9, 0x46, 0xb4, 0x1c, 0x51, 0xf8, 0x63, 0x98, 0x7e, 0xe5, 0x13, 0x51, 0xed, 0x98, 0x65, 0x98, 0x4f, 0x8f, 0xe7, 0x7e, 0x72, 0xd7, 0x64, 0x11, 0x2f, 0xcd, 0x12, 0xf8, 0xc4, 0x63, 0x52, 0x0f, 0x7f, 0xc4, + /* (2^252)P */ 0x5c, 0xd9, 0x85, 0x63, 0xc7, 0x8a, 0x65, 0x9a, 0x25, 0x83, 0x31, 0x73, 0x49, 0xf0, 0x93, 0x96, 0x70, 0x67, 0x6d, 0xb1, 0xff, 0x95, 0x54, 0xe4, 0xf8, 0x15, 0x6c, 0x5f, 0xbd, 0xf6, 0x0f, 0x38, 0x7b, 0x68, 0x7d, 0xd9, 0x3d, 0xf0, 0xa9, 0xa0, 0xe4, 0xd1, 0xb6, 0x34, 0x6d, 0x14, 0x16, 0xc2, 0x4c, 0x30, 0x0e, 0x67, 0xd3, 0xbe, 0x2e, 0xc0, + /* (2^253)P */ 0x06, 0x6b, 0x52, 0xc8, 0x14, 0xcd, 0xae, 0x03, 0x93, 0xea, 0xc1, 0xf2, 0xf6, 0x8b, 0xc5, 0xb6, 0xdc, 0x82, 0x42, 0x29, 0x94, 0xe0, 0x25, 0x6c, 0x3f, 0x9f, 0x5d, 0xe4, 0x96, 0xf6, 0x8e, 0x3f, 0xf9, 0x72, 0xc4, 0x77, 0x60, 0x8b, 0xa4, 0xf9, 0xa8, 0xc3, 0x0a, 0x81, 0xb1, 0x97, 0x70, 0x18, 0xab, 0xea, 0x37, 0x8a, 0x08, 0xc7, 0xe2, 0x95, + /* (2^254)P */ 0x94, 0x49, 0xd9, 0x5f, 0x76, 0x72, 0x82, 0xad, 0x2d, 0x50, 0x1a, 0x7a, 0x5b, 0xe6, 0x95, 0x1e, 0x95, 0x65, 0x87, 0x1c, 0x52, 0xd7, 0x44, 0xe6, 0x9b, 0x56, 0xcd, 0x6f, 0x05, 0xff, 0x67, 0xc5, 0xdb, 0xa2, 0xac, 0xe4, 0xa2, 0x28, 0x63, 0x5f, 0xfb, 0x0c, 0x3b, 0xf1, 0x87, 0xc3, 0x36, 0x78, 0x3f, 0x77, 0xfa, 0x50, 0x85, 0xf9, 0xd7, 0x82, + /* (2^255)P */ 0x64, 0xc0, 0xe0, 0xd8, 0x2d, 0xed, 0xcb, 0x6a, 0xfd, 0xcd, 0xbc, 0x7e, 0x9f, 0xc8, 0x85, 0xe9, 0xc1, 0x7c, 0x0f, 0xe5, 0x18, 0xea, 0xd4, 0x51, 0xad, 0x59, 0x13, 0x75, 0xd9, 0x3d, 0xd4, 0x8a, 0xb2, 0xbe, 0x78, 0x52, 0x2b, 0x52, 0x94, 0x37, 0x41, 0xd6, 0xb4, 0xb6, 0x45, 0x20, 0x76, 0xe0, 0x1f, 0x31, 0xdb, 0xb1, 0xa1, 0x43, 0xf0, 0x18, + /* (2^256)P */ 0x74, 0xa9, 0xa4, 0xa9, 0xdd, 0x6e, 0x3e, 0x68, 0xe5, 0xc3, 0x2e, 0x92, 0x17, 0xa4, 0xcb, 0x80, 0xb1, 0xf0, 0x06, 0x93, 0xef, 0xe6, 0x00, 0xe6, 0x3b, 0xb1, 0x32, 0x65, 0x7b, 0x83, 0xb6, 0x8a, 0x49, 0x1b, 0x14, 0x89, 0xee, 0xba, 0xf5, 0x6a, 0x8d, 0x36, 0xef, 0xb0, 0xd8, 0xb2, 0x16, 0x99, 0x17, 0x35, 0x02, 0x16, 0x55, 0x58, 0xdd, 0x82, + /* (2^257)P */ 0x36, 0x95, 0xe8, 0xf4, 0x36, 0x42, 0xbb, 0xc5, 0x3e, 0xfa, 0x30, 0x84, 0x9e, 0x59, 0xfd, 0xd2, 0x95, 0x42, 0xf8, 0x64, 0xd9, 0xb9, 0x0e, 0x9f, 0xfa, 0xd0, 0x7b, 0x20, 0x31, 0x77, 0x48, 0x29, 0x4d, 0xd0, 0x32, 0x57, 0x56, 0x30, 0xa6, 0x17, 0x53, 0x04, 0xbf, 0x08, 0x28, 0xec, 0xb8, 0x46, 0xc1, 0x03, 0x89, 0xdc, 0xed, 0xa0, 0x35, 0x53, + /* (2^258)P */ 0xc5, 0x7f, 0x9e, 0xd8, 0xc5, 0xba, 0x5f, 0x68, 0xc8, 0x23, 0x75, 0xea, 0x0d, 0xd9, 0x5a, 0xfd, 0x61, 0x1a, 0xa3, 0x2e, 0x45, 0x63, 0x14, 0x55, 0x86, 0x21, 0x29, 0xbe, 0xef, 0x5e, 0x50, 0xe5, 0x18, 0x59, 0xe7, 0xe3, 0xce, 0x4d, 0x8c, 0x15, 0x8f, 0x89, 0x66, 0x44, 0x52, 0x3d, 0xfa, 0xc7, 0x9a, 0x59, 0x90, 0x8e, 0xc0, 0x06, 0x3f, 0xc9, + /* (2^259)P */ 0x8e, 0x04, 0xd9, 0x16, 0x50, 0x1d, 0x8c, 0x9f, 0xd5, 0xe3, 0xce, 0xfd, 0x47, 0x04, 0x27, 0x4d, 0xc2, 0xfa, 0x71, 0xd9, 0x0b, 0xb8, 0x65, 0xf4, 0x11, 0xf3, 0x08, 0xee, 0x81, 0xc8, 0x67, 0x99, 0x0b, 0x8d, 0x77, 0xa3, 0x4f, 0xb5, 0x9b, 0xdb, 0x26, 0xf1, 0x97, 0xeb, 0x04, 0x54, 0xeb, 0x80, 0x08, 0x1d, 0x1d, 0xf6, 0x3d, 0x1f, 0x5a, 0xb8, + /* (2^260)P */ 0xb7, 0x9c, 0x9d, 0xee, 0xb9, 0x5c, 0xad, 0x0d, 0x9e, 0xfd, 0x60, 0x3c, 0x27, 0x4e, 0xa2, 0x95, 0xfb, 0x64, 0x7e, 0x79, 0x64, 0x87, 0x10, 0xb4, 0x73, 0xe0, 0x9d, 0x46, 0x4d, 0x3d, 0xee, 0x83, 0xe4, 0x16, 0x88, 0x97, 0xe6, 0x4d, 0xba, 0x70, 0xb6, 0x96, 0x7b, 0xff, 0x4b, 0xc8, 0xcf, 0x72, 0x83, 0x3e, 0x5b, 0x24, 0x2e, 0x57, 0xf1, 0x82, + /* (2^261)P */ 0x30, 0x71, 0x40, 0x51, 0x4f, 0x44, 0xbb, 0xc7, 0xf0, 0x54, 0x6e, 0x9d, 0xeb, 0x15, 0xad, 0xf8, 0x61, 0x43, 0x5a, 0xef, 0xc0, 0xb1, 0x57, 0xae, 0x03, 0x40, 0xe8, 0x68, 0x6f, 0x03, 0x20, 0x4f, 0x8a, 0x51, 0x2a, 0x9e, 0xd2, 0x45, 0xaf, 0xb4, 0xf5, 0xd4, 0x95, 0x7f, 0x3d, 0x3d, 0xb7, 0xb6, 0x28, 0xc5, 0x08, 0x8b, 0x44, 0xd6, 0x3f, 0xe7, + /* (2^262)P */ 0xa9, 0x52, 0x04, 0x67, 0xcb, 0x20, 0x63, 0xf8, 0x18, 0x01, 0x44, 0x21, 0x6a, 0x8a, 0x83, 0x48, 0xd4, 0xaf, 0x23, 0x0f, 0x35, 0x8d, 0xe5, 0x5a, 0xc4, 0x7c, 0x55, 0x46, 0x19, 0x5f, 0x35, 0xe0, 0x5d, 0x97, 0x4c, 0x2d, 0x04, 0xed, 0x59, 0xd4, 0xb0, 0xb2, 0xc6, 0xe3, 0x51, 0xe1, 0x38, 0xc6, 0x30, 0x49, 0x8f, 0xae, 0x61, 0x64, 0xce, 0xa8, + /* (2^263)P */ 0x9b, 0x64, 0x83, 0x3c, 0xd3, 0xdf, 0xb9, 0x27, 0xe7, 0x5b, 0x7f, 0xeb, 0xf3, 0x26, 0xcf, 0xb1, 0x8f, 0xaf, 0x26, 0xc8, 0x48, 0xce, 0xa1, 0xac, 0x7d, 0x10, 0x34, 0x28, 0xe1, 0x1f, 0x69, 0x03, 0x64, 0x77, 0x61, 0xdd, 0x4a, 0x9b, 0x18, 0x47, 0xf8, 0xca, 0x63, 0xc9, 0x03, 0x2d, 0x20, 0x2a, 0x69, 0x6e, 0x42, 0xd0, 0xe7, 0xaa, 0xb5, 0xf3, + /* (2^264)P */ 0xea, 0x31, 0x0c, 0x57, 0x0f, 0x3e, 0xe3, 0x35, 0xd8, 0x30, 0xa5, 0x6f, 0xdd, 0x95, 0x43, 0xc6, 0x66, 0x07, 0x4f, 0x34, 0xc3, 0x7e, 0x04, 0x10, 0x2d, 0xc4, 0x1c, 0x94, 0x52, 0x2e, 0x5b, 0x9a, 0x65, 0x2f, 0x91, 0xaa, 0x4f, 0x3c, 0xdc, 0x23, 0x18, 0xe1, 0x4f, 0x85, 0xcd, 0xf4, 0x8c, 0x51, 0xf7, 0xab, 0x4f, 0xdc, 0x15, 0x5c, 0x9e, 0xc5, + /* (2^265)P */ 0x54, 0x57, 0x23, 0x17, 0xe7, 0x82, 0x2f, 0x04, 0x7d, 0xfe, 0xe7, 0x1f, 0xa2, 0x57, 0x79, 0xe9, 0x58, 0x9b, 0xbe, 0xc6, 0x16, 0x4a, 0x17, 0x50, 0x90, 0x4a, 0x34, 0x70, 0x87, 0x37, 0x01, 0x26, 0xd8, 0xa3, 0x5f, 0x07, 0x7c, 0xd0, 0x7d, 0x05, 0x8a, 0x93, 0x51, 0x2f, 0x99, 0xea, 0xcf, 0x00, 0xd8, 0xc7, 0xe6, 0x9b, 0x8c, 0x62, 0x45, 0x87, + /* (2^266)P */ 0xc3, 0xfd, 0x29, 0x66, 0xe7, 0x30, 0x29, 0x77, 0xe0, 0x0d, 0x63, 0x5b, 0xe6, 0x90, 0x1a, 0x1e, 0x99, 0xc2, 0xa7, 0xab, 0xff, 0xa7, 0xbd, 0x79, 0x01, 0x97, 0xfd, 0x27, 0x1b, 0x43, 0x2b, 0xe6, 0xfe, 0x5e, 0xf1, 0xb9, 0x35, 0x38, 0x08, 0x25, 0x55, 0x90, 0x68, 0x2e, 0xc3, 0x67, 0x39, 0x9f, 0x2b, 0x2c, 0x70, 0x48, 0x8c, 0x47, 0xee, 0x56, + /* (2^267)P */ 0xf7, 0x32, 0x70, 0xb5, 0xe6, 0x42, 0xfd, 0x0a, 0x39, 0x9b, 0x07, 0xfe, 0x0e, 0xf4, 0x47, 0xba, 0x6a, 0x3f, 0xf5, 0x2c, 0x15, 0xf3, 0x60, 0x3f, 0xb1, 0x83, 0x7b, 0x2e, 0x34, 0x58, 0x1a, 0x6e, 0x4a, 0x49, 0x05, 0x45, 0xca, 0xdb, 0x00, 0x01, 0x0c, 0x42, 0x5e, 0x60, 0x40, 0x5f, 0xd9, 0xc7, 0x3a, 0x9e, 0x1c, 0x8d, 0xab, 0x11, 0x55, 0x65, + /* (2^268)P */ 0x87, 0x40, 0xb7, 0x0d, 0xaa, 0x34, 0x89, 0x90, 0x75, 0x6d, 0xa2, 0xfe, 0x3b, 0x6d, 0x5c, 0x39, 0x98, 0x10, 0x9e, 0x15, 0xc5, 0x35, 0xa2, 0x27, 0x23, 0x0a, 0x2d, 0x60, 0xe2, 0xa8, 0x7f, 0x3e, 0x77, 0x8f, 0xcc, 0x44, 0xcc, 0x30, 0x28, 0xe2, 0xf0, 0x04, 0x8c, 0xee, 0xe4, 0x5f, 0x68, 0x8c, 0xdf, 0x70, 0xbf, 0x31, 0xee, 0x2a, 0xfc, 0xce, + /* (2^269)P */ 0x92, 0xf2, 0xa0, 0xd9, 0x58, 0x3b, 0x7c, 0x1a, 0x99, 0x46, 0x59, 0x54, 0x60, 0x06, 0x8d, 0x5e, 0xf0, 0x22, 0xa1, 0xed, 0x92, 0x8a, 0x4d, 0x76, 0x95, 0x05, 0x0b, 0xff, 0xfc, 0x9a, 0xd1, 0xcc, 0x05, 0xb9, 0x5e, 0x99, 0xe8, 0x2a, 0x76, 0x7b, 0xfd, 0xa6, 0xe2, 0xd1, 0x1a, 0xd6, 0x76, 0x9f, 0x2f, 0x0e, 0xd1, 0xa8, 0x77, 0x5a, 0x40, 0x5a, + /* (2^270)P */ 0xff, 0xf9, 0x3f, 0xa9, 0xa6, 0x6c, 0x6d, 0x03, 0x8b, 0xa7, 0x10, 0x5d, 0x3f, 0xec, 0x3e, 0x1c, 0x0b, 0x6b, 0xa2, 0x6a, 0x22, 0xa9, 0x28, 0xd0, 0x66, 0xc9, 0xc2, 0x3d, 0x47, 0x20, 0x7d, 0xa6, 0x1d, 0xd8, 0x25, 0xb5, 0xf2, 0xf9, 0x70, 0x19, 0x6b, 0xf8, 0x43, 0x36, 0xc5, 0x1f, 0xe4, 0x5a, 0x4c, 0x13, 0xe4, 0x6d, 0x08, 0x0b, 0x1d, 0xb1, + /* (2^271)P */ 0x3f, 0x20, 0x9b, 0xfb, 0xec, 0x7d, 0x31, 0xc5, 0xfc, 0x88, 0x0b, 0x30, 0xed, 0x36, 0xc0, 0x63, 0xb1, 0x7d, 0x10, 0xda, 0xb6, 0x2e, 0xad, 0xf3, 0xec, 0x94, 0xe7, 0xec, 0xb5, 0x9c, 0xfe, 0xf5, 0x35, 0xf0, 0xa2, 0x2d, 0x7f, 0xca, 0x6b, 0x67, 0x1a, 0xf6, 0xb3, 0xda, 0x09, 0x2a, 0xaa, 0xdf, 0xb1, 0xca, 0x9b, 0xfb, 0xeb, 0xb3, 0xcd, 0xc0, + /* (2^272)P */ 0xcd, 0x4d, 0x89, 0x00, 0xa4, 0x3b, 0x48, 0xf0, 0x76, 0x91, 0x35, 0xa5, 0xf8, 0xc9, 0xb6, 0x46, 0xbc, 0xf6, 0x9a, 0x45, 0x47, 0x17, 0x96, 0x80, 0x5b, 0x3a, 0x28, 0x33, 0xf9, 0x5a, 0xef, 0x43, 0x07, 0xfe, 0x3b, 0xf4, 0x8e, 0x19, 0xce, 0xd2, 0x94, 0x4b, 0x6d, 0x8e, 0x67, 0x20, 0xc7, 0x4f, 0x2f, 0x59, 0x8e, 0xe1, 0xa1, 0xa9, 0xf9, 0x0e, + /* (2^273)P */ 0xdc, 0x7b, 0xb5, 0x50, 0x2e, 0xe9, 0x7e, 0x8b, 0x78, 0xa1, 0x38, 0x96, 0x22, 0xc3, 0x61, 0x67, 0x6d, 0xc8, 0x58, 0xed, 0x41, 0x1d, 0x5d, 0x86, 0x98, 0x7f, 0x2f, 0x1b, 0x8d, 0x3e, 0xaa, 0xc1, 0xd2, 0x0a, 0xf3, 0xbf, 0x95, 0x04, 0xf3, 0x10, 0x3c, 0x2b, 0x7f, 0x90, 0x46, 0x04, 0xaa, 0x6a, 0xa9, 0x35, 0x76, 0xac, 0x49, 0xb5, 0x00, 0x45, + /* (2^274)P */ 0xb1, 0x93, 0x79, 0x84, 0x4a, 0x2a, 0x30, 0x78, 0x16, 0xaa, 0xc5, 0x74, 0x06, 0xce, 0xa5, 0xa7, 0x32, 0x86, 0xe0, 0xf9, 0x10, 0xd2, 0x58, 0x76, 0xfb, 0x66, 0x49, 0x76, 0x3a, 0x90, 0xba, 0xb5, 0xcc, 0x99, 0xcd, 0x09, 0xc1, 0x9a, 0x74, 0x23, 0xdf, 0x0c, 0xfe, 0x99, 0x52, 0x80, 0xa3, 0x7c, 0x1c, 0x71, 0x5f, 0x2c, 0x49, 0x57, 0xf4, 0xf9, + /* (2^275)P */ 0x6d, 0xbf, 0x52, 0xe6, 0x25, 0x98, 0xed, 0xcf, 0xe3, 0xbc, 0x08, 0xa2, 0x1a, 0x90, 0xae, 0xa0, 0xbf, 0x07, 0x15, 0xad, 0x0a, 0x9f, 0x3e, 0x47, 0x44, 0xc2, 0x10, 0x46, 0xa6, 0x7a, 0x9e, 0x2f, 0x57, 0xbc, 0xe2, 0xf0, 0x1d, 0xd6, 0x9a, 0x06, 0xed, 0xfc, 0x54, 0x95, 0x92, 0x15, 0xa2, 0xf7, 0x8d, 0x6b, 0xef, 0xb2, 0x05, 0xed, 0x5c, 0x63, + /* (2^276)P */ 0xbc, 0x0b, 0x27, 0x3a, 0x3a, 0xf8, 0xe1, 0x48, 0x02, 0x7e, 0x27, 0xe6, 0x81, 0x62, 0x07, 0x73, 0x74, 0xe5, 0x52, 0xd7, 0xf8, 0x26, 0xca, 0x93, 0x4d, 0x3e, 0x9b, 0x55, 0x09, 0x8e, 0xe3, 0xd7, 0xa6, 0xe3, 0xb6, 0x2a, 0xa9, 0xb3, 0xb0, 0xa0, 0x8c, 0x01, 0xbb, 0x07, 0x90, 0x78, 0x6d, 0x6d, 0xe9, 0xf0, 0x7a, 0x90, 0xbd, 0xdc, 0x0c, 0x36, + /* (2^277)P */ 0x7f, 0x20, 0x12, 0x0f, 0x40, 0x00, 0x53, 0xd8, 0x0c, 0x27, 0x47, 0x47, 0x22, 0x80, 0xfb, 0x62, 0xe4, 0xa7, 0xf7, 0xbd, 0x42, 0xa5, 0xc3, 0x2b, 0xb2, 0x7f, 0x50, 0xcc, 0xe2, 0xfb, 0xd5, 0xc0, 0x63, 0xdd, 0x24, 0x5f, 0x7c, 0x08, 0x91, 0xbf, 0x6e, 0x47, 0x44, 0xd4, 0x6a, 0xc0, 0xc3, 0x09, 0x39, 0x27, 0xdd, 0xc7, 0xca, 0x06, 0x29, 0x55, + /* (2^278)P */ 0x76, 0x28, 0x58, 0xb0, 0xd2, 0xf3, 0x0f, 0x04, 0xe9, 0xc9, 0xab, 0x66, 0x5b, 0x75, 0x51, 0xdc, 0xe5, 0x8f, 0xe8, 0x1f, 0xdb, 0x03, 0x0f, 0xb0, 0x7d, 0xf9, 0x20, 0x64, 0x89, 0xe9, 0xdc, 0xe6, 0x24, 0xc3, 0xd5, 0xd2, 0x41, 0xa6, 0xe4, 0xe3, 0xc4, 0x79, 0x7c, 0x0f, 0xa1, 0x61, 0x2f, 0xda, 0xa4, 0xc9, 0xfd, 0xad, 0x5c, 0x65, 0x6a, 0xf3, + /* (2^279)P */ 0xd5, 0xab, 0x72, 0x7a, 0x3b, 0x59, 0xea, 0xcf, 0xd5, 0x17, 0xd2, 0xb2, 0x5f, 0x2d, 0xab, 0xad, 0x9e, 0x88, 0x64, 0x55, 0x96, 0x6e, 0xf3, 0x44, 0xa9, 0x11, 0xf5, 0xf8, 0x3a, 0xf1, 0xcd, 0x79, 0x4c, 0x99, 0x6d, 0x23, 0x6a, 0xa0, 0xc2, 0x1a, 0x19, 0x45, 0xb5, 0xd8, 0x95, 0x2f, 0x49, 0xe9, 0x46, 0x39, 0x26, 0x60, 0x04, 0x15, 0x8b, 0xcc, + /* (2^280)P */ 0x66, 0x0c, 0xf0, 0x54, 0x41, 0x02, 0x91, 0xab, 0xe5, 0x85, 0x8a, 0x44, 0xa6, 0x34, 0x96, 0x32, 0xc0, 0xdf, 0x6c, 0x41, 0x39, 0xd4, 0xc6, 0xe1, 0xe3, 0x81, 0xb0, 0x4c, 0x34, 0x4f, 0xe5, 0xf4, 0x35, 0x46, 0x1f, 0xeb, 0x75, 0xfd, 0x43, 0x37, 0x50, 0x99, 0xab, 0xad, 0xb7, 0x8c, 0xa1, 0x57, 0xcb, 0xe6, 0xce, 0x16, 0x2e, 0x85, 0xcc, 0xf9, + /* (2^281)P */ 0x63, 0xd1, 0x3f, 0x9e, 0xa2, 0x17, 0x2e, 0x1d, 0x3e, 0xce, 0x48, 0x2d, 0xbb, 0x8f, 0x69, 0xc9, 0xa6, 0x3d, 0x4e, 0xfe, 0x09, 0x56, 0xb3, 0x02, 0x5f, 0x99, 0x97, 0x0c, 0x54, 0xda, 0x32, 0x97, 0x9b, 0xf4, 0x95, 0xf1, 0xad, 0xe3, 0x2b, 0x04, 0xa7, 0x9b, 0x3f, 0xbb, 0xe7, 0x87, 0x2e, 0x1f, 0x8b, 0x4b, 0x7a, 0xa4, 0x43, 0x0c, 0x0f, 0x35, + /* (2^282)P */ 0x05, 0xdc, 0xe0, 0x2c, 0xa1, 0xc1, 0xd0, 0xf1, 0x1f, 0x4e, 0xc0, 0x6c, 0x35, 0x7b, 0xca, 0x8f, 0x8b, 0x02, 0xb1, 0xf7, 0xd6, 0x2e, 0xe7, 0x93, 0x80, 0x85, 0x18, 0x88, 0x19, 0xb9, 0xb4, 0x4a, 0xbc, 0xeb, 0x5a, 0x78, 0x38, 0xed, 0xc6, 0x27, 0x2a, 0x74, 0x76, 0xf0, 0x1b, 0x79, 0x92, 0x2f, 0xd2, 0x81, 0x98, 0xdf, 0xa9, 0x50, 0x19, 0xeb, + /* (2^283)P */ 0xb5, 0xe7, 0xb4, 0x11, 0x3a, 0x81, 0xb6, 0xb4, 0xf8, 0xa2, 0xb3, 0x6c, 0xfc, 0x9d, 0xe0, 0xc0, 0xe0, 0x59, 0x7f, 0x05, 0x37, 0xef, 0x2c, 0xa9, 0x3a, 0x24, 0xac, 0x7b, 0x25, 0xa0, 0x55, 0xd2, 0x44, 0x82, 0x82, 0x6e, 0x64, 0xa3, 0x58, 0xc8, 0x67, 0xae, 0x26, 0xa7, 0x0f, 0x42, 0x63, 0xe1, 0x93, 0x01, 0x52, 0x19, 0xaf, 0x49, 0x3e, 0x33, + /* (2^284)P */ 0x05, 0x85, 0xe6, 0x66, 0xaf, 0x5f, 0xdf, 0xbf, 0x9d, 0x24, 0x62, 0x60, 0x90, 0xe2, 0x4c, 0x7d, 0x4e, 0xc3, 0x74, 0x5d, 0x4f, 0x53, 0xf3, 0x63, 0x13, 0xf4, 0x74, 0x28, 0x6b, 0x7d, 0x57, 0x0c, 0x9d, 0x84, 0xa7, 0x1a, 0xff, 0xa0, 0x79, 0xdf, 0xfc, 0x65, 0x98, 0x8e, 0x22, 0x0d, 0x62, 0x7e, 0xf2, 0x34, 0x60, 0x83, 0x05, 0x14, 0xb1, 0xc1, + /* (2^285)P */ 0x64, 0x22, 0xcc, 0xdf, 0x5c, 0xbc, 0x88, 0x68, 0x4c, 0xd9, 0xbc, 0x0e, 0xc9, 0x8b, 0xb4, 0x23, 0x52, 0xad, 0xb0, 0xb3, 0xf1, 0x17, 0xd8, 0x15, 0x04, 0x6b, 0x99, 0xf0, 0xc4, 0x7d, 0x48, 0x22, 0x4a, 0xf8, 0x6f, 0xaa, 0x88, 0x0d, 0xc5, 0x5e, 0xa9, 0x1c, 0x61, 0x3d, 0x95, 0xa9, 0x7b, 0x6a, 0x79, 0x33, 0x0a, 0x2b, 0x99, 0xe3, 0x4e, 0x48, + /* (2^286)P */ 0x6b, 0x9b, 0x6a, 0x2a, 0xf1, 0x60, 0x31, 0xb4, 0x73, 0xd1, 0x87, 0x45, 0x9c, 0x15, 0x58, 0x4b, 0x91, 0x6d, 0x94, 0x1c, 0x41, 0x11, 0x4a, 0x83, 0xec, 0xaf, 0x65, 0xbc, 0x34, 0xaa, 0x26, 0xe2, 0xaf, 0xed, 0x46, 0x05, 0x4e, 0xdb, 0xc6, 0x4e, 0x10, 0x28, 0x4e, 0x72, 0xe5, 0x31, 0xa3, 0x20, 0xd7, 0xb1, 0x96, 0x64, 0xf6, 0xce, 0x08, 0x08, + /* (2^287)P */ 0x16, 0xa9, 0x5c, 0x9f, 0x9a, 0xb4, 0xb8, 0xc8, 0x32, 0x78, 0xc0, 0x3a, 0xd9, 0x5f, 0x94, 0xac, 0x3a, 0x42, 0x1f, 0x43, 0xd6, 0x80, 0x47, 0x2c, 0xdc, 0x76, 0x27, 0xfa, 0x50, 0xe5, 0xa1, 0xe4, 0xc3, 0xcb, 0x61, 0x31, 0xe1, 0x2e, 0xde, 0x81, 0x3b, 0x77, 0x1c, 0x39, 0x3c, 0xdb, 0xda, 0x87, 0x4b, 0x84, 0x12, 0xeb, 0xdd, 0x54, 0xbf, 0xe7, + /* (2^288)P */ 0xbf, 0xcb, 0x73, 0x21, 0x3d, 0x7e, 0x13, 0x8c, 0xa6, 0x34, 0x21, 0x2b, 0xa5, 0xe4, 0x9f, 0x8e, 0x9c, 0x01, 0x9c, 0x43, 0xd9, 0xc7, 0xb9, 0xf1, 0xbe, 0x7f, 0x45, 0x51, 0x97, 0xa1, 0x8e, 0x01, 0xf8, 0xbd, 0xd2, 0xbf, 0x81, 0x3a, 0x8b, 0xab, 0xe4, 0x89, 0xb7, 0xbd, 0xf2, 0xcd, 0xa9, 0x8a, 0x8a, 0xde, 0xfb, 0x8a, 0x55, 0x12, 0x7b, 0x17, + /* (2^289)P */ 0x1b, 0x95, 0x58, 0x4d, 0xe6, 0x51, 0x31, 0x52, 0x1c, 0xd8, 0x15, 0x84, 0xb1, 0x0d, 0x36, 0x25, 0x88, 0x91, 0x46, 0x71, 0x42, 0x56, 0xe2, 0x90, 0x08, 0x9e, 0x77, 0x1b, 0xee, 0x22, 0x3f, 0xec, 0xee, 0x8c, 0x7b, 0x2e, 0x79, 0xc4, 0x6c, 0x07, 0xa1, 0x7e, 0x52, 0xf5, 0x26, 0x5c, 0x84, 0x2a, 0x50, 0x6e, 0x82, 0xb3, 0x76, 0xda, 0x35, 0x16, + /* (2^290)P */ 0x0a, 0x6f, 0x99, 0x87, 0xc0, 0x7d, 0x8a, 0xb2, 0xca, 0xae, 0xe8, 0x65, 0x98, 0x0f, 0xb3, 0x44, 0xe1, 0xdc, 0x52, 0x79, 0x75, 0xec, 0x8f, 0x95, 0x87, 0x45, 0xd1, 0x32, 0x18, 0x55, 0x15, 0xce, 0x64, 0x9b, 0x08, 0x4f, 0x2c, 0xea, 0xba, 0x1c, 0x57, 0x06, 0x63, 0xc8, 0xb1, 0xfd, 0xc5, 0x67, 0xe7, 0x1f, 0x87, 0x9e, 0xde, 0x72, 0x7d, 0xec, + /* (2^291)P */ 0x36, 0x8b, 0x4d, 0x2c, 0xc2, 0x46, 0xe8, 0x96, 0xac, 0x0b, 0x8c, 0xc5, 0x09, 0x10, 0xfc, 0xf2, 0xda, 0xea, 0x22, 0xb2, 0xd3, 0x89, 0xeb, 0xb2, 0x85, 0x0f, 0xff, 0x59, 0x50, 0x2c, 0x99, 0x5a, 0x1f, 0xec, 0x2a, 0x6f, 0xec, 0xcf, 0xe9, 0xce, 0x12, 0x6b, 0x19, 0xd8, 0xde, 0x9b, 0xce, 0x0e, 0x6a, 0xaa, 0xe1, 0x32, 0xea, 0x4c, 0xfe, 0x92, + /* (2^292)P */ 0x5f, 0x17, 0x70, 0x53, 0x26, 0x03, 0x0b, 0xab, 0xd1, 0xc1, 0x42, 0x0b, 0xab, 0x2b, 0x3d, 0x31, 0xa4, 0xd5, 0x2b, 0x5e, 0x00, 0xd5, 0x9a, 0x22, 0x34, 0xe0, 0x53, 0x3f, 0x59, 0x7f, 0x2c, 0x6d, 0x72, 0x9a, 0xa4, 0xbe, 0x3d, 0x42, 0x05, 0x1b, 0xf2, 0x7f, 0x88, 0x56, 0xd1, 0x7c, 0x7d, 0x6b, 0x9f, 0x43, 0xfe, 0x65, 0x19, 0xae, 0x9c, 0x4c, + /* (2^293)P */ 0xf3, 0x7c, 0x20, 0xa9, 0xfc, 0xf2, 0xf2, 0x3b, 0x3c, 0x57, 0x41, 0x94, 0xe5, 0xcc, 0x6a, 0x37, 0x5d, 0x09, 0xf2, 0xab, 0xc2, 0xca, 0x60, 0x38, 0x6b, 0x7a, 0xe1, 0x78, 0x2b, 0xc1, 0x1d, 0xe8, 0xfd, 0xbc, 0x3d, 0x5c, 0xa2, 0xdb, 0x49, 0x20, 0x79, 0xe6, 0x1b, 0x9b, 0x65, 0xd9, 0x6d, 0xec, 0x57, 0x1d, 0xd2, 0xe9, 0x90, 0xeb, 0x43, 0x7b, + /* (2^294)P */ 0x2a, 0x8b, 0x2e, 0x19, 0x18, 0x10, 0xb8, 0x83, 0xe7, 0x7d, 0x2d, 0x9a, 0x3a, 0xe5, 0xd1, 0xe4, 0x7c, 0x38, 0xe5, 0x59, 0x2a, 0x6e, 0xd9, 0x01, 0x29, 0x3d, 0x23, 0xf7, 0x52, 0xba, 0x61, 0x04, 0x9a, 0xde, 0xc4, 0x31, 0x50, 0xeb, 0x1b, 0xaa, 0xde, 0x39, 0x58, 0xd8, 0x1b, 0x1e, 0xfc, 0x57, 0x9a, 0x28, 0x43, 0x9e, 0x97, 0x5e, 0xaa, 0xa3, + /* (2^295)P */ 0x97, 0x0a, 0x74, 0xc4, 0x39, 0x99, 0x6b, 0x40, 0xc7, 0x3e, 0x8c, 0xa7, 0xb1, 0x4e, 0x9a, 0x59, 0x6e, 0x1c, 0xfe, 0xfc, 0x2a, 0x5e, 0x73, 0x2b, 0x8c, 0xa9, 0x71, 0xf5, 0xda, 0x6b, 0x15, 0xab, 0xf7, 0xbe, 0x2a, 0x44, 0x5f, 0xba, 0xae, 0x67, 0x93, 0xc5, 0x86, 0xc1, 0xb8, 0xdf, 0xdc, 0xcb, 0xd7, 0xff, 0xb1, 0x71, 0x7c, 0x6f, 0x88, 0xf8, + /* (2^296)P */ 0x3f, 0x89, 0xb1, 0xbf, 0x24, 0x16, 0xac, 0x56, 0xfe, 0xdf, 0x94, 0x71, 0xbf, 0xd6, 0x57, 0x0c, 0xb4, 0x77, 0x37, 0xaa, 0x2a, 0x70, 0x76, 0x49, 0xaf, 0x0c, 0x97, 0x8e, 0x78, 0x2a, 0x67, 0xc9, 0x3b, 0x3d, 0x5b, 0x01, 0x2f, 0xda, 0xd5, 0xa8, 0xde, 0x02, 0xa9, 0xac, 0x76, 0x00, 0x0b, 0x46, 0xc6, 0x2d, 0xdc, 0x08, 0xf4, 0x10, 0x2c, 0xbe, + /* (2^297)P */ 0xcb, 0x07, 0xf9, 0x91, 0xc6, 0xd5, 0x3e, 0x54, 0x63, 0xae, 0xfc, 0x10, 0xbe, 0x3a, 0x20, 0x73, 0x4e, 0x65, 0x0e, 0x2d, 0x86, 0x77, 0x83, 0x9d, 0xe2, 0x0a, 0xe9, 0xac, 0x22, 0x52, 0x76, 0xd4, 0x6e, 0xfa, 0xe0, 0x09, 0xef, 0x78, 0x82, 0x9f, 0x26, 0xf9, 0x06, 0xb5, 0xe7, 0x05, 0x0e, 0xf2, 0x46, 0x72, 0x93, 0xd3, 0x24, 0xbd, 0x87, 0x60, + /* (2^298)P */ 0x14, 0x55, 0x84, 0x7b, 0x6c, 0x60, 0x80, 0x73, 0x8c, 0xbe, 0x2d, 0xd6, 0x69, 0xd6, 0x17, 0x26, 0x44, 0x9f, 0x88, 0xa2, 0x39, 0x7c, 0x89, 0xbc, 0x6d, 0x9e, 0x46, 0xb6, 0x68, 0x66, 0xea, 0xdc, 0x31, 0xd6, 0x21, 0x51, 0x9f, 0x28, 0x28, 0xaf, 0x9e, 0x47, 0x2c, 0x4c, 0x8f, 0xf3, 0xaf, 0x1f, 0xe4, 0xab, 0xac, 0xe9, 0x0c, 0x91, 0x3a, 0x61, + /* (2^299)P */ 0xb0, 0x37, 0x55, 0x4b, 0xe9, 0xc3, 0xb1, 0xce, 0x42, 0xe6, 0xc5, 0x11, 0x7f, 0x2c, 0x11, 0xfc, 0x4e, 0x71, 0x17, 0x00, 0x74, 0x7f, 0xbf, 0x07, 0x4d, 0xfd, 0x40, 0xb2, 0x87, 0xb0, 0xef, 0x1f, 0x35, 0x2c, 0x2d, 0xd7, 0xe1, 0xe4, 0xad, 0x0e, 0x7f, 0x63, 0x66, 0x62, 0x23, 0x41, 0xf6, 0xc1, 0x14, 0xa6, 0xd7, 0xa9, 0x11, 0x56, 0x9d, 0x1b, + /* (2^300)P */ 0x02, 0x82, 0x42, 0x18, 0x4f, 0x1b, 0xc9, 0x5d, 0x78, 0x5f, 0xee, 0xed, 0x01, 0x49, 0x8f, 0xf2, 0xa0, 0xe2, 0x6e, 0xbb, 0x6b, 0x04, 0x8d, 0xb2, 0x41, 0xae, 0xc8, 0x1b, 0x59, 0x34, 0xb8, 0x2a, 0xdb, 0x1f, 0xd2, 0x52, 0xdf, 0x3f, 0x35, 0x00, 0x8b, 0x61, 0xbc, 0x97, 0xa0, 0xc4, 0x77, 0xd1, 0xe4, 0x2c, 0x59, 0x68, 0xff, 0x30, 0xf2, 0xe2, + /* (2^301)P */ 0x79, 0x08, 0xb1, 0xdb, 0x55, 0xae, 0xd0, 0xed, 0xda, 0xa0, 0xec, 0x6c, 0xae, 0x68, 0xf2, 0x0b, 0x61, 0xb3, 0xf5, 0x21, 0x69, 0x87, 0x0b, 0x03, 0xea, 0x8a, 0x15, 0xd9, 0x7e, 0xca, 0xf7, 0xcd, 0xf3, 0x33, 0xb3, 0x4c, 0x5b, 0x23, 0x4e, 0x6f, 0x90, 0xad, 0x91, 0x4b, 0x4f, 0x46, 0x37, 0xe5, 0xe8, 0xb7, 0xeb, 0xd5, 0xca, 0x34, 0x4e, 0x23, + /* (2^302)P */ 0x09, 0x02, 0xdd, 0xfd, 0x70, 0xac, 0x56, 0x80, 0x36, 0x5e, 0x49, 0xd0, 0x3f, 0xc2, 0xe0, 0xba, 0x46, 0x7f, 0x5c, 0xf7, 0xc5, 0xbd, 0xd5, 0x55, 0x7d, 0x3f, 0xd5, 0x7d, 0x06, 0xdf, 0x27, 0x20, 0x4f, 0xe9, 0x30, 0xec, 0x1b, 0xa0, 0x0c, 0xd4, 0x2c, 0xe1, 0x2b, 0x65, 0x73, 0xea, 0x75, 0x35, 0xe8, 0xe6, 0x56, 0xd6, 0x07, 0x15, 0x99, 0xdf, + /* (2^303)P */ 0x4e, 0x10, 0xb7, 0xd0, 0x63, 0x8c, 0xcf, 0x16, 0x00, 0x7c, 0x58, 0xdf, 0x86, 0xdc, 0x4e, 0xca, 0x9c, 0x40, 0x5a, 0x42, 0xfd, 0xec, 0x98, 0xa4, 0x42, 0x53, 0xae, 0x16, 0x9d, 0xfd, 0x75, 0x5a, 0x12, 0x56, 0x1e, 0xc6, 0x57, 0xcc, 0x79, 0x27, 0x96, 0x00, 0xcf, 0x80, 0x4f, 0x8a, 0x36, 0x5c, 0xbb, 0xe9, 0x12, 0xdb, 0xb6, 0x2b, 0xad, 0x96, + /* (2^304)P */ 0x92, 0x32, 0x1f, 0xfd, 0xc6, 0x02, 0x94, 0x08, 0x1b, 0x60, 0x6a, 0x9f, 0x8b, 0xd6, 0xc8, 0xad, 0xd5, 0x1b, 0x27, 0x4e, 0xa4, 0x4d, 0x4a, 0x00, 0x10, 0x5f, 0x86, 0x11, 0xf5, 0xe3, 0x14, 0x32, 0x43, 0xee, 0xb9, 0xc7, 0xab, 0xf4, 0x6f, 0xe5, 0x66, 0x0c, 0x06, 0x0d, 0x96, 0x79, 0x28, 0xaf, 0x45, 0x2b, 0x56, 0xbe, 0xe4, 0x4a, 0x52, 0xd6, + /* (2^305)P */ 0x15, 0x16, 0x69, 0xef, 0x60, 0xca, 0x82, 0x25, 0x0f, 0xc6, 0x30, 0xa0, 0x0a, 0xd1, 0x83, 0x29, 0xcd, 0xb6, 0x89, 0x6c, 0xf5, 0xb2, 0x08, 0x38, 0xe6, 0xca, 0x6b, 0x19, 0x93, 0xc6, 0x5f, 0x75, 0x8e, 0x60, 0x34, 0x23, 0xc4, 0x13, 0x17, 0x69, 0x55, 0xcc, 0x72, 0x9c, 0x2b, 0x6c, 0x80, 0xf4, 0x4b, 0x8b, 0xb6, 0x97, 0x65, 0x07, 0xb6, 0xfb, + /* (2^306)P */ 0x01, 0x99, 0x74, 0x28, 0xa6, 0x67, 0xa3, 0xe5, 0x25, 0xfb, 0xdf, 0x82, 0x93, 0xe7, 0x35, 0x74, 0xce, 0xe3, 0x15, 0x1c, 0x1d, 0x79, 0x52, 0x84, 0x08, 0x04, 0x2f, 0x5c, 0xb8, 0xcd, 0x7f, 0x89, 0xb0, 0x39, 0x93, 0x63, 0xc9, 0x5d, 0x06, 0x01, 0x59, 0xf7, 0x7e, 0xf1, 0x4c, 0x3d, 0x12, 0x8d, 0x69, 0x1d, 0xb7, 0x21, 0x5e, 0x88, 0x82, 0xa2, + /* (2^307)P */ 0x8e, 0x69, 0xaf, 0x9a, 0x41, 0x0d, 0x9d, 0xcf, 0x8e, 0x8d, 0x5c, 0x51, 0x6e, 0xde, 0x0e, 0x48, 0x23, 0x89, 0xe5, 0x37, 0x80, 0xd6, 0x9d, 0x72, 0x32, 0x26, 0x38, 0x2d, 0x63, 0xa0, 0xfa, 0xd3, 0x40, 0xc0, 0x8c, 0x68, 0x6f, 0x2b, 0x1e, 0x9a, 0x39, 0x51, 0x78, 0x74, 0x9a, 0x7b, 0x4a, 0x8f, 0x0c, 0xa0, 0x88, 0x60, 0xa5, 0x21, 0xcd, 0xc7, + /* (2^308)P */ 0x3a, 0x7f, 0x73, 0x14, 0xbf, 0x89, 0x6a, 0x4c, 0x09, 0x5d, 0xf2, 0x93, 0x20, 0x2d, 0xc4, 0x29, 0x86, 0x06, 0x95, 0xab, 0x22, 0x76, 0x4c, 0x54, 0xe1, 0x7e, 0x80, 0x6d, 0xab, 0x29, 0x61, 0x87, 0x77, 0xf6, 0xc0, 0x3e, 0xda, 0xab, 0x65, 0x7e, 0x39, 0x12, 0xa1, 0x6b, 0x42, 0xf7, 0xc5, 0x97, 0x77, 0xec, 0x6f, 0x22, 0xbe, 0x44, 0xc7, 0x03, + /* (2^309)P */ 0xa5, 0x23, 0x90, 0x41, 0xa3, 0xc5, 0x3e, 0xe0, 0xa5, 0x32, 0x49, 0x1f, 0x39, 0x78, 0xb1, 0xd8, 0x24, 0xea, 0xd4, 0x87, 0x53, 0x42, 0x51, 0xf4, 0xd9, 0x46, 0x25, 0x2f, 0x62, 0xa9, 0x90, 0x9a, 0x4a, 0x25, 0x8a, 0xd2, 0x10, 0xe7, 0x3c, 0xbc, 0x58, 0x8d, 0x16, 0x14, 0x96, 0xa4, 0x6f, 0xf8, 0x12, 0x69, 0x91, 0x73, 0xe2, 0xfa, 0xf4, 0x57, + /* (2^310)P */ 0x51, 0x45, 0x3f, 0x96, 0xdc, 0x97, 0x38, 0xa6, 0x01, 0x63, 0x09, 0xea, 0xc2, 0x13, 0x30, 0xb0, 0x00, 0xb8, 0x0a, 0xce, 0xd1, 0x8f, 0x3e, 0x69, 0x62, 0x46, 0x33, 0x9c, 0xbf, 0x4b, 0xcb, 0x0c, 0x90, 0x1c, 0x45, 0xcf, 0x37, 0x5b, 0xf7, 0x4b, 0x5e, 0x95, 0xc3, 0x28, 0x9f, 0x08, 0x83, 0x53, 0x74, 0xab, 0x0c, 0xb4, 0xc0, 0xa1, 0xbc, 0x89, + /* (2^311)P */ 0x06, 0xb1, 0x51, 0x15, 0x65, 0x60, 0x21, 0x17, 0x7a, 0x20, 0x65, 0xee, 0x12, 0x35, 0x4d, 0x46, 0xf4, 0xf8, 0xd0, 0xb1, 0xca, 0x09, 0x30, 0x08, 0x89, 0x23, 0x3b, 0xe7, 0xab, 0x8b, 0x77, 0xa6, 0xad, 0x25, 0xdd, 0xea, 0x3c, 0x7d, 0xa5, 0x24, 0xb3, 0xe8, 0xfa, 0xfb, 0xc9, 0xf2, 0x71, 0xe9, 0xfa, 0xf2, 0xdc, 0x54, 0xdd, 0x55, 0x2e, 0x2f, + /* (2^312)P */ 0x7f, 0x96, 0x96, 0xfb, 0x52, 0x86, 0xcf, 0xea, 0x62, 0x18, 0xf1, 0x53, 0x1f, 0x61, 0x2a, 0x9f, 0x8c, 0x51, 0xca, 0x2c, 0xde, 0x6d, 0xce, 0xab, 0x58, 0x32, 0x0b, 0x33, 0x9b, 0x99, 0xb4, 0x5c, 0x88, 0x2a, 0x76, 0xcc, 0x3e, 0x54, 0x1e, 0x9d, 0xa2, 0x89, 0xe4, 0x19, 0xba, 0x80, 0xc8, 0x39, 0x32, 0x7f, 0x0f, 0xc7, 0x84, 0xbb, 0x43, 0x56, + /* (2^313)P */ 0x9b, 0x07, 0xb4, 0x42, 0xa9, 0xa0, 0x78, 0x4f, 0x28, 0x70, 0x2b, 0x7e, 0x61, 0xe0, 0xdd, 0x02, 0x98, 0xfc, 0xed, 0x31, 0x80, 0xf1, 0x15, 0x52, 0x89, 0x23, 0xcd, 0x5d, 0x2b, 0xc5, 0x19, 0x32, 0xfb, 0x70, 0x50, 0x7a, 0x97, 0x6b, 0x42, 0xdb, 0xca, 0xdb, 0xc4, 0x59, 0x99, 0xe0, 0x12, 0x1f, 0x17, 0xba, 0x8b, 0xf0, 0xc4, 0x38, 0x5d, 0x27, + /* (2^314)P */ 0x29, 0x1d, 0xdc, 0x2b, 0xf6, 0x5b, 0x04, 0x61, 0x36, 0x76, 0xa0, 0x56, 0x36, 0x6e, 0xd7, 0x24, 0x4d, 0xe7, 0xef, 0x44, 0xd2, 0xd5, 0x07, 0xcd, 0xc4, 0x9d, 0x80, 0x48, 0xc3, 0x38, 0xcf, 0xd8, 0xa3, 0xdd, 0xb2, 0x5e, 0xb5, 0x70, 0x15, 0xbb, 0x36, 0x85, 0x8a, 0xd7, 0xfb, 0x56, 0x94, 0x73, 0x9c, 0x81, 0xbe, 0xb1, 0x44, 0x28, 0xf1, 0x37, + /* (2^315)P */ 0xbf, 0xcf, 0x5c, 0xd2, 0xe2, 0xea, 0xc2, 0xcd, 0x70, 0x7a, 0x9d, 0xcb, 0x81, 0xc1, 0xe9, 0xf1, 0x56, 0x71, 0x52, 0xf7, 0x1b, 0x87, 0xc6, 0xd8, 0xcc, 0xb2, 0x69, 0xf3, 0xb0, 0xbd, 0xba, 0x83, 0x12, 0x26, 0xc4, 0xce, 0x72, 0xde, 0x3b, 0x21, 0x28, 0x9e, 0x5a, 0x94, 0xf5, 0x04, 0xa3, 0xc8, 0x0f, 0x5e, 0xbc, 0x71, 0xf9, 0x0d, 0xce, 0xf5, + /* (2^316)P */ 0x93, 0x97, 0x00, 0x85, 0xf4, 0xb4, 0x40, 0xec, 0xd9, 0x2b, 0x6c, 0xd6, 0x63, 0x9e, 0x93, 0x0a, 0x5a, 0xf4, 0xa7, 0x9a, 0xe3, 0x3c, 0xf0, 0x55, 0xd1, 0x96, 0x6c, 0xf5, 0x2a, 0xce, 0xd7, 0x95, 0x72, 0xbf, 0xc5, 0x0c, 0xce, 0x79, 0xa2, 0x0a, 0x78, 0xe0, 0x72, 0xd0, 0x66, 0x28, 0x05, 0x75, 0xd3, 0x23, 0x09, 0x91, 0xed, 0x7e, 0xc4, 0xbc, + /* (2^317)P */ 0x77, 0xc2, 0x9a, 0xf7, 0xa6, 0xe6, 0x18, 0xb4, 0xe7, 0xf6, 0xda, 0xec, 0x44, 0x6d, 0xfb, 0x08, 0xee, 0x65, 0xa8, 0x92, 0x85, 0x1f, 0xba, 0x38, 0x93, 0x20, 0x5c, 0x4d, 0xd2, 0x18, 0x0f, 0x24, 0xbe, 0x1a, 0x96, 0x44, 0x7d, 0xeb, 0xb3, 0xda, 0x95, 0xf4, 0xaf, 0x6c, 0x06, 0x0f, 0x47, 0x37, 0xc8, 0x77, 0x63, 0xe1, 0x29, 0xef, 0xff, 0xa5, + /* (2^318)P */ 0x16, 0x12, 0xd9, 0x47, 0x90, 0x22, 0x9b, 0x05, 0xf2, 0xa5, 0x9a, 0xae, 0x83, 0x98, 0xb5, 0xac, 0xab, 0x29, 0xaa, 0xdc, 0x5f, 0xde, 0xcd, 0xf7, 0x42, 0xad, 0x3b, 0x96, 0xd6, 0x3e, 0x6e, 0x52, 0x47, 0xb1, 0xab, 0x51, 0xde, 0x49, 0x7c, 0x87, 0x8d, 0x86, 0xe2, 0x70, 0x13, 0x21, 0x51, 0x1c, 0x0c, 0x25, 0xc1, 0xb0, 0xe6, 0x19, 0xcf, 0x12, + /* (2^319)P */ 0xf0, 0xbc, 0x97, 0x8f, 0x4b, 0x2f, 0xd1, 0x1f, 0x8c, 0x57, 0xed, 0x3c, 0xf4, 0x26, 0x19, 0xbb, 0x60, 0xca, 0x24, 0xc5, 0xd9, 0x97, 0xe2, 0x5f, 0x76, 0x49, 0x39, 0x7e, 0x2d, 0x12, 0x21, 0x98, 0xda, 0xe6, 0xdb, 0xd2, 0xd8, 0x9f, 0x18, 0xd8, 0x83, 0x6c, 0xba, 0x89, 0x8d, 0x29, 0xfa, 0x46, 0x33, 0x8c, 0x28, 0xdf, 0x6a, 0xb3, 0x69, 0x28, + /* (2^320)P */ 0x86, 0x17, 0xbc, 0xd6, 0x7c, 0xba, 0x1e, 0x83, 0xbb, 0x84, 0xb5, 0x8c, 0xad, 0xdf, 0xa1, 0x24, 0x81, 0x70, 0x40, 0x0f, 0xad, 0xad, 0x3b, 0x23, 0xd0, 0x93, 0xa0, 0x49, 0x5c, 0x4b, 0x51, 0xbe, 0x20, 0x49, 0x4e, 0xda, 0x2d, 0xd3, 0xad, 0x1b, 0x74, 0x08, 0x41, 0xf0, 0xef, 0x19, 0xe9, 0x45, 0x5d, 0x02, 0xae, 0x26, 0x25, 0xd9, 0xd1, 0xc2, + /* (2^321)P */ 0x48, 0x81, 0x3e, 0xb2, 0x83, 0xf8, 0x4d, 0xb3, 0xd0, 0x4c, 0x75, 0xb3, 0xa0, 0x52, 0x26, 0xf2, 0xaf, 0x5d, 0x36, 0x70, 0x72, 0xd6, 0xb7, 0x88, 0x08, 0x69, 0xbd, 0x15, 0x25, 0xb1, 0x45, 0x1b, 0xb7, 0x0b, 0x5f, 0x71, 0x5d, 0x83, 0x49, 0xb9, 0x84, 0x3b, 0x7c, 0xc1, 0x50, 0x93, 0x05, 0x53, 0xe0, 0x61, 0xea, 0xc1, 0xef, 0xdb, 0x82, 0x97, + /* (2^322)P */ 0x00, 0xd5, 0xc3, 0x3a, 0x4d, 0x8a, 0x23, 0x7a, 0xef, 0xff, 0x37, 0xef, 0xf3, 0xbc, 0xa9, 0xb6, 0xae, 0xd7, 0x3a, 0x7b, 0xfd, 0x3e, 0x8e, 0x9b, 0xab, 0x44, 0x54, 0x60, 0x28, 0x6c, 0xbf, 0x15, 0x24, 0x4a, 0x56, 0x60, 0x7f, 0xa9, 0x7a, 0x28, 0x59, 0x2c, 0x8a, 0xd1, 0x7d, 0x6b, 0x00, 0xfd, 0xa5, 0xad, 0xbc, 0x19, 0x3f, 0xcb, 0x73, 0xe0, + /* (2^323)P */ 0xcf, 0x9e, 0x66, 0x06, 0x4d, 0x2b, 0xf5, 0x9c, 0xc2, 0x9d, 0x9e, 0xed, 0x5a, 0x5c, 0x2d, 0x00, 0xbf, 0x29, 0x90, 0x88, 0xe4, 0x5d, 0xfd, 0xe2, 0xf0, 0x38, 0xec, 0x4d, 0x26, 0xea, 0x54, 0xf0, 0x3c, 0x84, 0x10, 0x6a, 0xf9, 0x66, 0x9c, 0xe7, 0x21, 0xfd, 0x0f, 0xc7, 0x13, 0x50, 0x81, 0xb6, 0x50, 0xf9, 0x04, 0x7f, 0xa4, 0x37, 0x85, 0x14, + /* (2^324)P */ 0xdb, 0x87, 0x49, 0xc7, 0xa8, 0x39, 0x0c, 0x32, 0x98, 0x0c, 0xb9, 0x1a, 0x1b, 0x4d, 0xe0, 0x8a, 0x9a, 0x8e, 0x8f, 0xab, 0x5a, 0x17, 0x3d, 0x04, 0x21, 0xce, 0x3e, 0x2c, 0xf9, 0xa3, 0x97, 0xe4, 0x77, 0x95, 0x0e, 0xb6, 0xa5, 0x15, 0xad, 0x3a, 0x1e, 0x46, 0x53, 0x17, 0x09, 0x83, 0x71, 0x4e, 0x86, 0x38, 0xd5, 0x23, 0x44, 0x16, 0x8d, 0xc8, + /* (2^325)P */ 0x05, 0x5e, 0x99, 0x08, 0xbb, 0xc3, 0xc0, 0xb7, 0x6c, 0x12, 0xf2, 0xf3, 0xf4, 0x7c, 0x6a, 0x4d, 0x9e, 0xeb, 0x3d, 0xb9, 0x63, 0x94, 0xce, 0x81, 0xd8, 0x11, 0xcb, 0x55, 0x69, 0x4a, 0x20, 0x0b, 0x4c, 0x2e, 0x14, 0xb8, 0xd4, 0x6a, 0x7c, 0xf0, 0xed, 0xfc, 0x8f, 0xef, 0xa0, 0xeb, 0x6c, 0x01, 0xe2, 0xdc, 0x10, 0x22, 0xa2, 0x01, 0x85, 0x64, + /* (2^326)P */ 0x58, 0xe1, 0x9c, 0x27, 0x55, 0xc6, 0x25, 0xa6, 0x7d, 0x67, 0x88, 0x65, 0x99, 0x6c, 0xcb, 0xdb, 0x27, 0x4f, 0x44, 0x29, 0xf5, 0x4a, 0x23, 0x10, 0xbc, 0x03, 0x3f, 0x36, 0x1e, 0xef, 0xb0, 0xba, 0x75, 0xe8, 0x74, 0x5f, 0x69, 0x3e, 0x26, 0x40, 0xb4, 0x2f, 0xdc, 0x43, 0xbf, 0xa1, 0x8b, 0xbd, 0xca, 0x6e, 0xc1, 0x6e, 0x21, 0x79, 0xa0, 0xd0, + /* (2^327)P */ 0x78, 0x93, 0x4a, 0x2d, 0x22, 0x6e, 0x6e, 0x7d, 0x74, 0xd2, 0x66, 0x58, 0xce, 0x7b, 0x1d, 0x97, 0xb1, 0xf2, 0xda, 0x1c, 0x79, 0xfb, 0xba, 0xd1, 0xc0, 0xc5, 0x6e, 0xc9, 0x11, 0x89, 0xd2, 0x41, 0x8d, 0x70, 0xb9, 0xcc, 0xea, 0x6a, 0xb3, 0x45, 0xb6, 0x05, 0x2e, 0xf2, 0x17, 0xf1, 0x27, 0xb8, 0xed, 0x06, 0x1f, 0xdb, 0x9d, 0x1f, 0x69, 0x28, + /* (2^328)P */ 0x93, 0x12, 0xa8, 0x11, 0xe1, 0x92, 0x30, 0x8d, 0xac, 0xe1, 0x1c, 0x60, 0x7c, 0xed, 0x2d, 0x2e, 0xd3, 0x03, 0x5c, 0x9c, 0xc5, 0xbd, 0x64, 0x4a, 0x8c, 0xba, 0x76, 0xfe, 0xc6, 0xc1, 0xea, 0xc2, 0x4f, 0xbe, 0x70, 0x3d, 0x64, 0xcf, 0x8e, 0x18, 0xcb, 0xcd, 0x57, 0xa7, 0xf7, 0x36, 0xa9, 0x6b, 0x3e, 0xb8, 0x69, 0xee, 0x47, 0xa2, 0x7e, 0xb2, + /* (2^329)P */ 0x96, 0xaf, 0x3a, 0xf5, 0xed, 0xcd, 0xaf, 0xf7, 0x82, 0xaf, 0x59, 0x62, 0x0b, 0x36, 0x85, 0xf9, 0xaf, 0xd6, 0x38, 0xff, 0x87, 0x2e, 0x1d, 0x6c, 0x8b, 0xaf, 0x3b, 0xdf, 0x28, 0xa2, 0xd6, 0x4d, 0x80, 0x92, 0xc3, 0x0f, 0x34, 0xa8, 0xae, 0x69, 0x5d, 0x7b, 0x9d, 0xbc, 0xf5, 0xfd, 0x1d, 0xb1, 0x96, 0x55, 0x86, 0xe1, 0x5c, 0xb6, 0xac, 0xb9, + /* (2^330)P */ 0x50, 0x9e, 0x37, 0x28, 0x7d, 0xa8, 0x33, 0x63, 0xda, 0x3f, 0x20, 0x98, 0x0e, 0x09, 0xa8, 0x77, 0x3b, 0x7a, 0xfc, 0x16, 0x85, 0x44, 0x64, 0x77, 0x65, 0x68, 0x92, 0x41, 0xc6, 0x1f, 0xdf, 0x27, 0xf9, 0xec, 0xa0, 0x61, 0x22, 0xea, 0x19, 0xe7, 0x75, 0x8b, 0x4e, 0xe5, 0x0f, 0xb7, 0xf7, 0xd2, 0x53, 0xf4, 0xdd, 0x4a, 0xaa, 0x78, 0x40, 0xb7, + /* (2^331)P */ 0xd4, 0x89, 0xe3, 0x79, 0xba, 0xb6, 0xc3, 0xda, 0xe6, 0x78, 0x65, 0x7d, 0x6e, 0x22, 0x62, 0xb1, 0x3d, 0xea, 0x90, 0x84, 0x30, 0x5e, 0xd4, 0x39, 0x84, 0x78, 0xd9, 0x75, 0xd6, 0xce, 0x2a, 0x11, 0x29, 0x69, 0xa4, 0x5e, 0xaa, 0x2a, 0x98, 0x5a, 0xe5, 0x91, 0x8f, 0xb2, 0xfb, 0xda, 0x97, 0xe8, 0x83, 0x6f, 0x04, 0xb9, 0x5d, 0xaf, 0xe1, 0x9b, + /* (2^332)P */ 0x8b, 0xe4, 0xe1, 0x48, 0x9c, 0xc4, 0x83, 0x89, 0xdf, 0x65, 0xd3, 0x35, 0x55, 0x13, 0xf4, 0x1f, 0x36, 0x92, 0x33, 0x38, 0xcb, 0xed, 0x15, 0xe6, 0x60, 0x2d, 0x25, 0xf5, 0x36, 0x60, 0x3a, 0x37, 0x9b, 0x71, 0x9d, 0x42, 0xb0, 0x14, 0xc8, 0xba, 0x62, 0xa3, 0x49, 0xb0, 0x88, 0xc1, 0x72, 0x73, 0xdd, 0x62, 0x40, 0xa9, 0x62, 0x88, 0x99, 0xca, + /* (2^333)P */ 0x47, 0x7b, 0xea, 0xda, 0x46, 0x2f, 0x45, 0xc6, 0xe3, 0xb4, 0x4d, 0x8d, 0xac, 0x0b, 0x54, 0x22, 0x06, 0x31, 0x16, 0x66, 0x3e, 0xe4, 0x38, 0x12, 0xcd, 0xf3, 0xe7, 0x99, 0x37, 0xd9, 0x62, 0x24, 0x4b, 0x05, 0xf2, 0x58, 0xe6, 0x29, 0x4b, 0x0d, 0xf6, 0xc1, 0xba, 0xa0, 0x1e, 0x0f, 0xcb, 0x1f, 0xc6, 0x2b, 0x19, 0xfc, 0x82, 0x01, 0xd0, 0x86, + /* (2^334)P */ 0xa2, 0xae, 0x77, 0x20, 0xfb, 0xa8, 0x18, 0xb4, 0x61, 0xef, 0xe8, 0x52, 0x79, 0xbb, 0x86, 0x90, 0x5d, 0x2e, 0x76, 0xed, 0x66, 0x60, 0x5d, 0x00, 0xb5, 0xa4, 0x00, 0x40, 0x89, 0xec, 0xd1, 0xd2, 0x0d, 0x26, 0xb9, 0x30, 0xb2, 0xd2, 0xb8, 0xe8, 0x0e, 0x56, 0xf9, 0x67, 0x94, 0x2e, 0x62, 0xe1, 0x79, 0x48, 0x2b, 0xa9, 0xfa, 0xea, 0xdb, 0x28, + /* (2^335)P */ 0x35, 0xf1, 0xb0, 0x43, 0xbd, 0x27, 0xef, 0x18, 0x44, 0xa2, 0x04, 0xb4, 0x69, 0xa1, 0x97, 0x1f, 0x8c, 0x04, 0x82, 0x9b, 0x00, 0x6d, 0xf8, 0xbf, 0x7d, 0xc1, 0x5b, 0xab, 0xe8, 0xb2, 0x34, 0xbd, 0xaf, 0x7f, 0xb2, 0x0d, 0xf3, 0xed, 0xfc, 0x5b, 0x50, 0xee, 0xe7, 0x4a, 0x20, 0xd9, 0xf5, 0xc6, 0x9a, 0x97, 0x6d, 0x07, 0x2f, 0xb9, 0x31, 0x02, + /* (2^336)P */ 0xf9, 0x54, 0x4a, 0xc5, 0x61, 0x7e, 0x1d, 0xa6, 0x0e, 0x1a, 0xa8, 0xd3, 0x8c, 0x36, 0x7d, 0xf1, 0x06, 0xb1, 0xac, 0x93, 0xcd, 0xe9, 0x8f, 0x61, 0x6c, 0x5d, 0x03, 0x23, 0xdf, 0x85, 0x53, 0x39, 0x63, 0x5e, 0xeb, 0xf3, 0xd3, 0xd3, 0x75, 0x97, 0x9b, 0x62, 0x9b, 0x01, 0xb3, 0x19, 0xd8, 0x2b, 0x36, 0xf2, 0x2c, 0x2c, 0x6f, 0x36, 0xc6, 0x3c, + /* (2^337)P */ 0x05, 0x74, 0x43, 0x10, 0xb6, 0xb0, 0xf8, 0xbf, 0x02, 0x46, 0x9a, 0xee, 0xc1, 0xaf, 0xc1, 0xe5, 0x5a, 0x2e, 0xbb, 0xe1, 0xdc, 0xc6, 0xce, 0x51, 0x29, 0x50, 0xbf, 0x1b, 0xde, 0xff, 0xba, 0x4d, 0x8d, 0x8b, 0x7e, 0xe7, 0xbd, 0x5b, 0x8f, 0xbe, 0xe3, 0x75, 0x71, 0xff, 0x37, 0x05, 0x5a, 0x10, 0xeb, 0x54, 0x7e, 0x44, 0x72, 0x2c, 0xd4, 0xfc, + /* (2^338)P */ 0x03, 0x12, 0x1c, 0xb2, 0x08, 0x90, 0xa1, 0x2d, 0x50, 0xa0, 0xad, 0x7f, 0x8d, 0xa6, 0x97, 0xc1, 0xbd, 0xdc, 0xc3, 0xa7, 0xad, 0x31, 0xdf, 0xb8, 0x03, 0x84, 0xc3, 0xb9, 0x29, 0x3d, 0x92, 0x2e, 0xc3, 0x90, 0x07, 0xe8, 0xa7, 0xc7, 0xbc, 0x61, 0xe9, 0x3e, 0xa0, 0x35, 0xda, 0x1d, 0xab, 0x48, 0xfe, 0x50, 0xc9, 0x25, 0x59, 0x23, 0x69, 0x3f, + /* (2^339)P */ 0x8e, 0x91, 0xab, 0x6b, 0x91, 0x4f, 0x89, 0x76, 0x67, 0xad, 0xb2, 0x65, 0x9d, 0xad, 0x02, 0x36, 0xdc, 0xac, 0x96, 0x93, 0x97, 0x21, 0x14, 0xd0, 0xe8, 0x11, 0x60, 0x1e, 0xeb, 0x96, 0x06, 0xf2, 0x53, 0xf2, 0x6d, 0xb7, 0x93, 0x6f, 0x26, 0x91, 0x23, 0xe3, 0x34, 0x04, 0x92, 0x91, 0x37, 0x08, 0x50, 0xd6, 0x28, 0x09, 0x27, 0xa1, 0x0c, 0x00, + /* (2^340)P */ 0x1f, 0xbb, 0x21, 0x26, 0x33, 0xcb, 0xa4, 0xd1, 0xee, 0x85, 0xf9, 0xd9, 0x3c, 0x90, 0xc3, 0xd1, 0x26, 0xa2, 0x25, 0x93, 0x43, 0x61, 0xed, 0x91, 0x6e, 0x54, 0x03, 0x2e, 0x42, 0x9d, 0xf7, 0xa6, 0x02, 0x0f, 0x2f, 0x9c, 0x7a, 0x8d, 0x12, 0xc2, 0x18, 0xfc, 0x41, 0xff, 0x85, 0x26, 0x1a, 0x44, 0x55, 0x0b, 0x89, 0xab, 0x6f, 0x62, 0x33, 0x8c, + /* (2^341)P */ 0xe0, 0x3c, 0x5d, 0x70, 0x64, 0x87, 0x81, 0x35, 0xf2, 0x37, 0xa6, 0x24, 0x3e, 0xe0, 0x62, 0xd5, 0x71, 0xe7, 0x93, 0xfb, 0xac, 0xc3, 0xe7, 0xc7, 0x04, 0xe2, 0x70, 0xd3, 0x29, 0x5b, 0x21, 0xbf, 0xf4, 0x26, 0x5d, 0xf3, 0x95, 0xb4, 0x2a, 0x6a, 0x07, 0x55, 0xa6, 0x4b, 0x3b, 0x15, 0xf2, 0x25, 0x8a, 0x95, 0x3f, 0x63, 0x2f, 0x7a, 0x23, 0x96, + /* (2^342)P */ 0x0d, 0x3d, 0xd9, 0x13, 0xa7, 0xb3, 0x5e, 0x67, 0xf7, 0x02, 0x23, 0xee, 0x84, 0xff, 0x99, 0xda, 0xb9, 0x53, 0xf8, 0xf0, 0x0e, 0x39, 0x2f, 0x3c, 0x64, 0x34, 0xe3, 0x09, 0xfd, 0x2b, 0x33, 0xc7, 0xfe, 0x62, 0x2b, 0x84, 0xdf, 0x2b, 0xd2, 0x7c, 0x26, 0x01, 0x70, 0x66, 0x5b, 0x85, 0xc2, 0xbe, 0x88, 0x37, 0xf1, 0x30, 0xac, 0xb8, 0x76, 0xa3, + /* (2^343)P */ 0x6e, 0x01, 0xf0, 0x55, 0x35, 0xe4, 0xbd, 0x43, 0x62, 0x9d, 0xd6, 0x11, 0xef, 0x6f, 0xb8, 0x8c, 0xaa, 0x98, 0x87, 0xc6, 0x6d, 0xc4, 0xcc, 0x74, 0x92, 0x53, 0x4a, 0xdf, 0xe4, 0x08, 0x89, 0x17, 0xd0, 0x0f, 0xf4, 0x00, 0x60, 0x78, 0x08, 0x44, 0xb5, 0xda, 0x18, 0xed, 0x98, 0xc8, 0x61, 0x3d, 0x39, 0xdb, 0xcf, 0x1d, 0x49, 0x40, 0x65, 0x75, + /* (2^344)P */ 0x8e, 0x10, 0xae, 0x5f, 0x06, 0xd2, 0x95, 0xfd, 0x20, 0x16, 0x49, 0x5b, 0x57, 0xbe, 0x22, 0x8b, 0x43, 0xfb, 0xe6, 0xcc, 0x26, 0xa5, 0x5d, 0xd3, 0x68, 0xc5, 0xf9, 0x5a, 0x86, 0x24, 0x87, 0x27, 0x05, 0xfd, 0xe2, 0xff, 0xb3, 0xa3, 0x7b, 0x37, 0x59, 0xc5, 0x4e, 0x14, 0x94, 0xf9, 0x3b, 0xcb, 0x7c, 0xed, 0xca, 0x1d, 0xb2, 0xac, 0x05, 0x4a, + /* (2^345)P */ 0xf4, 0xd1, 0x81, 0xeb, 0x89, 0xbf, 0xfe, 0x1e, 0x41, 0x92, 0x29, 0xee, 0xe1, 0x43, 0xf5, 0x86, 0x1d, 0x2f, 0xbb, 0x1e, 0x84, 0x5d, 0x7b, 0x8d, 0xd5, 0xda, 0xee, 0x1e, 0x8a, 0xd0, 0x27, 0xf2, 0x60, 0x51, 0x59, 0x82, 0xf4, 0x84, 0x2b, 0x5b, 0x14, 0x2d, 0x81, 0x82, 0x3e, 0x2b, 0xb4, 0x6d, 0x51, 0x4f, 0xc5, 0xcb, 0xbf, 0x74, 0xe3, 0xb4, + /* (2^346)P */ 0x19, 0x2f, 0x22, 0xb3, 0x04, 0x5f, 0x81, 0xca, 0x05, 0x60, 0xb9, 0xaa, 0xee, 0x0e, 0x2f, 0x48, 0x38, 0xf9, 0x91, 0xb4, 0x66, 0xe4, 0x57, 0x28, 0x54, 0x10, 0xe9, 0x61, 0x9d, 0xd4, 0x90, 0x75, 0xb1, 0x39, 0x23, 0xb6, 0xfc, 0x82, 0xe0, 0xfa, 0xbb, 0x5c, 0x6e, 0xc3, 0x44, 0x13, 0x00, 0x83, 0x55, 0x9e, 0x8e, 0x10, 0x61, 0x81, 0x91, 0x04, + /* (2^347)P */ 0x5f, 0x2a, 0xd7, 0x81, 0xd9, 0x9c, 0xbb, 0x79, 0xbc, 0x62, 0x56, 0x98, 0x03, 0x5a, 0x18, 0x85, 0x2a, 0x9c, 0xd0, 0xfb, 0xd2, 0xb1, 0xaf, 0xef, 0x0d, 0x24, 0xc5, 0xfa, 0x39, 0xbb, 0x6b, 0xed, 0xa4, 0xdf, 0xe4, 0x87, 0xcd, 0x41, 0xd3, 0x72, 0x32, 0xc6, 0x28, 0x21, 0xb1, 0xba, 0x8b, 0xa3, 0x91, 0x79, 0x76, 0x22, 0x25, 0x10, 0x61, 0xd1, + /* (2^348)P */ 0x73, 0xb5, 0x32, 0x97, 0xdd, 0xeb, 0xdd, 0x22, 0x22, 0xf1, 0x33, 0x3c, 0x77, 0x56, 0x7d, 0x6b, 0x48, 0x2b, 0x05, 0x81, 0x03, 0x03, 0x91, 0x9a, 0xe3, 0x5e, 0xd4, 0xee, 0x3f, 0xf8, 0xbb, 0x50, 0x21, 0x32, 0x4c, 0x4a, 0x58, 0x49, 0xde, 0x0c, 0xde, 0x30, 0x82, 0x3d, 0x92, 0xf0, 0x6c, 0xcc, 0x32, 0x3e, 0xd2, 0x78, 0x8a, 0x6e, 0x2c, 0xd0, + /* (2^349)P */ 0xf0, 0xf7, 0xa1, 0x0b, 0xc1, 0x74, 0x85, 0xa8, 0xe9, 0xdd, 0x48, 0xa1, 0xc0, 0x16, 0xd8, 0x2b, 0x61, 0x08, 0xc2, 0x2b, 0x30, 0x26, 0x79, 0xce, 0x9e, 0xfd, 0x39, 0xd7, 0x81, 0xa4, 0x63, 0x8c, 0xd5, 0x74, 0xa0, 0x88, 0xfa, 0x03, 0x30, 0xe9, 0x7f, 0x2b, 0xc6, 0x02, 0xc9, 0x5e, 0xe4, 0xd5, 0x4d, 0x92, 0xd0, 0xf6, 0xf2, 0x5b, 0x79, 0x08, + /* (2^350)P */ 0x34, 0x89, 0x81, 0x43, 0xd1, 0x94, 0x2c, 0x10, 0x54, 0x9b, 0xa0, 0xe5, 0x44, 0xe8, 0xc2, 0x2f, 0x3e, 0x0e, 0x74, 0xae, 0xba, 0xe2, 0xac, 0x85, 0x6b, 0xd3, 0x5c, 0x97, 0xf7, 0x90, 0xf1, 0x12, 0xc0, 0x03, 0xc8, 0x1f, 0x37, 0x72, 0x8c, 0x9b, 0x9c, 0x17, 0x96, 0x9d, 0xc7, 0xbf, 0xa3, 0x3f, 0x44, 0x3d, 0x87, 0x81, 0xbd, 0x81, 0xa6, 0x5f, + /* (2^351)P */ 0xe4, 0xff, 0x78, 0x62, 0x82, 0x5b, 0x76, 0x58, 0xf5, 0x5b, 0xa6, 0xc4, 0x53, 0x11, 0x3b, 0x7b, 0xaa, 0x67, 0xf8, 0xea, 0x3b, 0x5d, 0x9a, 0x2e, 0x04, 0xeb, 0x4a, 0x24, 0xfb, 0x56, 0xf0, 0xa8, 0xd4, 0x14, 0xed, 0x0f, 0xfd, 0xc5, 0x26, 0x17, 0x2a, 0xf0, 0xb9, 0x13, 0x8c, 0xbd, 0x65, 0x14, 0x24, 0x95, 0x27, 0x12, 0x63, 0x2a, 0x09, 0x18, + /* (2^352)P */ 0xe1, 0x5c, 0xe7, 0xe0, 0x00, 0x6a, 0x96, 0xf2, 0x49, 0x6a, 0x39, 0xa5, 0xe0, 0x17, 0x79, 0x4a, 0x63, 0x07, 0x62, 0x09, 0x61, 0x1b, 0x6e, 0xa9, 0xb5, 0x62, 0xb7, 0xde, 0xdf, 0x80, 0x4c, 0x5a, 0x99, 0x73, 0x59, 0x9d, 0xfb, 0xb1, 0x5e, 0xbe, 0xb8, 0xb7, 0x63, 0x93, 0xe8, 0xad, 0x5e, 0x1f, 0xae, 0x59, 0x1c, 0xcd, 0xb4, 0xc2, 0xb3, 0x8a, + /* (2^353)P */ 0x78, 0x53, 0xa1, 0x4c, 0x70, 0x9c, 0x63, 0x7e, 0xb3, 0x12, 0x40, 0x5f, 0xbb, 0x23, 0xa7, 0xf7, 0x77, 0x96, 0x5b, 0x4d, 0x91, 0x10, 0x52, 0x85, 0x9e, 0xa5, 0x38, 0x0b, 0xfd, 0x25, 0x01, 0x4b, 0xfa, 0x4d, 0xd3, 0x3f, 0x78, 0x74, 0x42, 0xff, 0x62, 0x2d, 0x27, 0xdc, 0x9d, 0xd1, 0x29, 0x76, 0x2e, 0x78, 0xb3, 0x35, 0xfa, 0x15, 0xd5, 0x38, + /* (2^354)P */ 0x8b, 0xc7, 0x43, 0xce, 0xf0, 0x5e, 0xf1, 0x0d, 0x02, 0x38, 0xe8, 0x82, 0xc9, 0x25, 0xad, 0x2d, 0x27, 0xa4, 0x54, 0x18, 0xb2, 0x30, 0x73, 0xa4, 0x41, 0x08, 0xe4, 0x86, 0xe6, 0x8c, 0xe9, 0x2a, 0x34, 0xb3, 0xd6, 0x61, 0x8f, 0x66, 0x26, 0x08, 0xb6, 0x06, 0x33, 0xaa, 0x12, 0xac, 0x72, 0xec, 0x2e, 0x52, 0xa3, 0x25, 0x3e, 0xd7, 0x62, 0xe8, + /* (2^355)P */ 0xc4, 0xbb, 0x89, 0xc8, 0x40, 0xcc, 0x84, 0xec, 0x4a, 0xd9, 0xc4, 0x55, 0x78, 0x00, 0xcf, 0xd8, 0xe9, 0x24, 0x59, 0xdc, 0x5e, 0xf0, 0x66, 0xa1, 0x83, 0xae, 0x97, 0x18, 0xc5, 0x54, 0x27, 0xa2, 0x21, 0x52, 0x03, 0x31, 0x5b, 0x11, 0x67, 0xf6, 0x12, 0x00, 0x87, 0x2f, 0xff, 0x59, 0x70, 0x8f, 0x6d, 0x71, 0xab, 0xab, 0x24, 0xb8, 0xba, 0x35, + /* (2^356)P */ 0x69, 0x43, 0xa7, 0x14, 0x06, 0x96, 0xe9, 0xc2, 0xe3, 0x2b, 0x45, 0x22, 0xc0, 0xd0, 0x2f, 0x34, 0xd1, 0x01, 0x99, 0xfc, 0x99, 0x38, 0xa1, 0x25, 0x2e, 0x59, 0x6c, 0x27, 0xc9, 0xeb, 0x7b, 0xdc, 0x4e, 0x26, 0x68, 0xba, 0xfa, 0xec, 0x02, 0x05, 0x64, 0x80, 0x30, 0x20, 0x5c, 0x26, 0x7f, 0xaf, 0x95, 0x17, 0x3d, 0x5c, 0x9e, 0x96, 0x96, 0xaf, + /* (2^357)P */ 0xa6, 0xba, 0x21, 0x29, 0x32, 0xe2, 0x98, 0xde, 0x9b, 0x6d, 0x0b, 0x44, 0x91, 0xa8, 0x3e, 0xd4, 0xb8, 0x04, 0x6c, 0xf6, 0x04, 0x39, 0xbd, 0x52, 0x05, 0x15, 0x27, 0x78, 0x8e, 0x55, 0xac, 0x79, 0xc5, 0xe6, 0x00, 0x7f, 0x90, 0xa2, 0xdd, 0x07, 0x13, 0xe0, 0x24, 0x70, 0x5c, 0x0f, 0x4d, 0xa9, 0xf9, 0xae, 0xcb, 0x34, 0x10, 0x9d, 0x89, 0x9d, + /* (2^358)P */ 0x12, 0xe0, 0xb3, 0x9f, 0xc4, 0x96, 0x1d, 0xcf, 0xed, 0x99, 0x64, 0x28, 0x8d, 0xc7, 0x31, 0x82, 0xee, 0x5e, 0x75, 0x48, 0xff, 0x3a, 0xf2, 0x09, 0x34, 0x03, 0x93, 0x52, 0x19, 0xb2, 0xc5, 0x81, 0x93, 0x45, 0x5e, 0x59, 0x21, 0x2b, 0xec, 0x89, 0xba, 0x36, 0x6e, 0xf9, 0x82, 0x75, 0x7e, 0x82, 0x3f, 0xaa, 0xe2, 0xe3, 0x3b, 0x94, 0xfd, 0x98, + /* (2^359)P */ 0x7c, 0xdb, 0x75, 0x31, 0x61, 0xfb, 0x15, 0x28, 0x94, 0xd7, 0xc3, 0x5a, 0xa9, 0xa1, 0x0a, 0x66, 0x0f, 0x2b, 0x13, 0x3e, 0x42, 0xb5, 0x28, 0x3a, 0xca, 0x83, 0xf3, 0x61, 0x22, 0xf4, 0x40, 0xc5, 0xdf, 0xe7, 0x31, 0x9f, 0x7e, 0x51, 0x75, 0x06, 0x9d, 0x51, 0xc8, 0xe7, 0x9f, 0xc3, 0x71, 0x4f, 0x3d, 0x5b, 0xfb, 0xe9, 0x8e, 0x08, 0x40, 0x8e, + /* (2^360)P */ 0xf7, 0x31, 0xad, 0x50, 0x5d, 0x25, 0x93, 0x73, 0x68, 0xf6, 0x7c, 0x89, 0x5a, 0x3d, 0x9f, 0x9b, 0x05, 0x82, 0xe7, 0x70, 0x4b, 0x19, 0xaa, 0xcf, 0xff, 0xde, 0x50, 0x8f, 0x2f, 0x69, 0xd3, 0xf0, 0x99, 0x51, 0x6b, 0x9d, 0xb6, 0x56, 0x6f, 0xf8, 0x4c, 0x74, 0x8b, 0x4c, 0x91, 0xf9, 0xa9, 0xb1, 0x3e, 0x07, 0xdf, 0x0b, 0x27, 0x8a, 0xb1, 0xed, + /* (2^361)P */ 0xfb, 0x67, 0xd9, 0x48, 0xd2, 0xe4, 0x44, 0x9b, 0x43, 0x15, 0x8a, 0xeb, 0x00, 0x53, 0xad, 0x25, 0xc7, 0x7e, 0x19, 0x30, 0x87, 0xb7, 0xd5, 0x5f, 0x04, 0xf8, 0xaa, 0xdd, 0x57, 0xae, 0x34, 0x75, 0xe2, 0x84, 0x4b, 0x54, 0x60, 0x37, 0x95, 0xe4, 0xd3, 0xec, 0xac, 0xef, 0x47, 0x31, 0xa3, 0xc8, 0x31, 0x22, 0xdb, 0x26, 0xe7, 0x6a, 0xb5, 0xad, + /* (2^362)P */ 0x44, 0x09, 0x5c, 0x95, 0xe4, 0x72, 0x3c, 0x1a, 0xd1, 0xac, 0x42, 0x51, 0x99, 0x6f, 0xfa, 0x1f, 0xf2, 0x22, 0xbe, 0xff, 0x7b, 0x66, 0xf5, 0x6c, 0xb3, 0x66, 0xc7, 0x4d, 0x78, 0x31, 0x83, 0x80, 0xf5, 0x41, 0xe9, 0x7f, 0xbe, 0xf7, 0x23, 0x49, 0x6b, 0x84, 0x4e, 0x7e, 0x47, 0x07, 0x6e, 0x74, 0xdf, 0xe5, 0x9d, 0x9e, 0x56, 0x2a, 0xc0, 0xbc, + /* (2^363)P */ 0xac, 0x10, 0x80, 0x8c, 0x7c, 0xfa, 0x83, 0xdf, 0xb3, 0xd0, 0xc4, 0xbe, 0xfb, 0x9f, 0xac, 0xc9, 0xc3, 0x40, 0x95, 0x0b, 0x09, 0x23, 0xda, 0x63, 0x67, 0xcf, 0xe7, 0x9f, 0x7d, 0x7b, 0x6b, 0xe2, 0xe6, 0x6d, 0xdb, 0x87, 0x9e, 0xa6, 0xff, 0x6d, 0xab, 0xbd, 0xfb, 0x54, 0x84, 0x68, 0xcf, 0x89, 0xf1, 0xd0, 0xe2, 0x85, 0x61, 0xdc, 0x22, 0xd1, + /* (2^364)P */ 0xa8, 0x48, 0xfb, 0x8c, 0x6a, 0x63, 0x01, 0x72, 0x43, 0x43, 0xeb, 0x21, 0xa3, 0x00, 0x8a, 0xc0, 0x87, 0x51, 0x9e, 0x86, 0x75, 0x16, 0x79, 0xf9, 0x6b, 0x11, 0x80, 0x62, 0xc2, 0x9d, 0xb8, 0x8c, 0x30, 0x8e, 0x8d, 0x03, 0x52, 0x7e, 0x31, 0x59, 0x38, 0xf9, 0x25, 0xc7, 0x0f, 0xc7, 0xa8, 0x2b, 0x5c, 0x80, 0xfa, 0x90, 0xa2, 0x63, 0xca, 0xe7, + /* (2^365)P */ 0xf1, 0x5d, 0xb5, 0xd9, 0x20, 0x10, 0x7d, 0x0f, 0xc5, 0x50, 0x46, 0x07, 0xff, 0x02, 0x75, 0x2b, 0x4a, 0xf3, 0x39, 0x91, 0x72, 0xb7, 0xd5, 0xcc, 0x38, 0xb8, 0xe7, 0x36, 0x26, 0x5e, 0x11, 0x97, 0x25, 0xfb, 0x49, 0x68, 0xdc, 0xb4, 0x46, 0x87, 0x5c, 0xc2, 0x7f, 0xaa, 0x7d, 0x36, 0x23, 0xa6, 0xc6, 0x53, 0xec, 0xbc, 0x57, 0x47, 0xc1, 0x2b, + /* (2^366)P */ 0x25, 0x5d, 0x7d, 0x95, 0xda, 0x0b, 0x8f, 0x78, 0x1e, 0x19, 0x09, 0xfa, 0x67, 0xe0, 0xa0, 0x17, 0x24, 0x76, 0x6c, 0x30, 0x1f, 0x62, 0x3d, 0xbe, 0x45, 0x70, 0xcc, 0xb6, 0x1e, 0x68, 0x06, 0x25, 0x68, 0x16, 0x1a, 0x33, 0x3f, 0x90, 0xc7, 0x78, 0x2d, 0x98, 0x3c, 0x2f, 0xb9, 0x2d, 0x94, 0x0b, 0xfb, 0x49, 0x56, 0x30, 0xd7, 0xc1, 0xe6, 0x48, + /* (2^367)P */ 0x7a, 0xd1, 0xe0, 0x8e, 0x67, 0xfc, 0x0b, 0x50, 0x1f, 0x84, 0x98, 0xfa, 0xaf, 0xae, 0x2e, 0x31, 0x27, 0xcf, 0x3f, 0xf2, 0x6e, 0x8d, 0x81, 0x8f, 0xd2, 0x5f, 0xde, 0xd3, 0x5e, 0xe9, 0xe7, 0x13, 0x48, 0x83, 0x5a, 0x4e, 0x84, 0xd1, 0x58, 0xcf, 0x6b, 0x84, 0xdf, 0x13, 0x1d, 0x91, 0x85, 0xe8, 0xcb, 0x29, 0x79, 0xd2, 0xca, 0xac, 0x6a, 0x93, + /* (2^368)P */ 0x53, 0x82, 0xce, 0x61, 0x96, 0x88, 0x6f, 0xe1, 0x4a, 0x4c, 0x1e, 0x30, 0x73, 0xe8, 0x74, 0xde, 0x40, 0x2b, 0xe0, 0xc4, 0xb5, 0xd8, 0x7c, 0x15, 0xe7, 0xe1, 0xb1, 0xe0, 0xd6, 0x88, 0xb1, 0x6a, 0x57, 0x19, 0x6a, 0x22, 0x66, 0x57, 0xf6, 0x8d, 0xfd, 0xc0, 0xf2, 0xa3, 0x03, 0x56, 0xfb, 0x2e, 0x75, 0x5e, 0xc7, 0x8e, 0x22, 0x96, 0x5c, 0x06, + /* (2^369)P */ 0x98, 0x7e, 0xbf, 0x3e, 0xbf, 0x24, 0x9d, 0x15, 0xd3, 0xf6, 0xd3, 0xd2, 0xf0, 0x11, 0xf2, 0xdb, 0x36, 0x23, 0x38, 0xf7, 0x1d, 0x71, 0x20, 0xd2, 0x54, 0x7f, 0x1e, 0x24, 0x8f, 0xe2, 0xaa, 0xf7, 0x3f, 0x6b, 0x41, 0x4e, 0xdc, 0x0e, 0xec, 0xe8, 0x35, 0x0a, 0x08, 0x6d, 0x89, 0x5b, 0x32, 0x91, 0x01, 0xb6, 0xe0, 0x2c, 0xc6, 0xa1, 0xbe, 0xb4, + /* (2^370)P */ 0x29, 0xf2, 0x1e, 0x1c, 0xdc, 0x68, 0x8a, 0x43, 0x87, 0x2c, 0x48, 0xb3, 0x9e, 0xed, 0xd2, 0x82, 0x46, 0xac, 0x2f, 0xef, 0x93, 0x34, 0x37, 0xca, 0x64, 0x8d, 0xc9, 0x06, 0x90, 0xbb, 0x78, 0x0a, 0x3c, 0x4c, 0xcf, 0x35, 0x7a, 0x0f, 0xf7, 0xa7, 0xf4, 0x2f, 0x45, 0x69, 0x3f, 0xa9, 0x5d, 0xce, 0x7b, 0x8a, 0x84, 0xc3, 0xae, 0xf4, 0xda, 0xd5, + /* (2^371)P */ 0xca, 0xba, 0x95, 0x43, 0x05, 0x7b, 0x06, 0xd9, 0x5c, 0x0a, 0x18, 0x5f, 0x6a, 0x6a, 0xce, 0xc0, 0x3d, 0x95, 0x51, 0x0e, 0x1a, 0xbe, 0x85, 0x7a, 0xf2, 0x69, 0xec, 0xc0, 0x8c, 0xca, 0xa3, 0x32, 0x0a, 0x76, 0x50, 0xc6, 0x76, 0x61, 0x00, 0x89, 0xbf, 0x6e, 0x0f, 0x48, 0x90, 0x31, 0x93, 0xec, 0x34, 0x70, 0xf0, 0xc3, 0x8d, 0xf0, 0x0f, 0xb5, + /* (2^372)P */ 0xbe, 0x23, 0xe2, 0x18, 0x99, 0xf1, 0xed, 0x8a, 0xf6, 0xc9, 0xac, 0xb8, 0x1e, 0x9a, 0x3c, 0x15, 0xae, 0xd7, 0x6d, 0xb3, 0x04, 0xee, 0x5b, 0x0d, 0x1e, 0x79, 0xb7, 0xf9, 0xf9, 0x8d, 0xad, 0xf9, 0x8f, 0x5a, 0x6a, 0x7b, 0xd7, 0x9b, 0xca, 0x62, 0xfe, 0x9c, 0xc0, 0x6f, 0x6d, 0x9d, 0x76, 0xa3, 0x69, 0xb9, 0x4c, 0xa1, 0xc4, 0x0c, 0x76, 0xaa, + /* (2^373)P */ 0x1c, 0x06, 0xfe, 0x3f, 0x45, 0x70, 0xcd, 0x97, 0xa9, 0xa2, 0xb1, 0xd3, 0xf2, 0xa5, 0x0c, 0x49, 0x2c, 0x75, 0x73, 0x1f, 0xcf, 0x00, 0xaf, 0xd5, 0x2e, 0xde, 0x0d, 0x8f, 0x8f, 0x7c, 0xc4, 0x58, 0xce, 0xd4, 0xf6, 0x24, 0x19, 0x2e, 0xd8, 0xc5, 0x1d, 0x1a, 0x3f, 0xb8, 0x4f, 0xbc, 0x7d, 0xbd, 0x68, 0xe3, 0x81, 0x98, 0x1b, 0xa8, 0xc9, 0xd9, + /* (2^374)P */ 0x39, 0x95, 0x78, 0x24, 0x6c, 0x38, 0xe4, 0xe7, 0xd0, 0x8d, 0xb9, 0x38, 0x71, 0x5e, 0xc1, 0x62, 0x80, 0xcc, 0xcb, 0x8c, 0x97, 0xca, 0xf8, 0xb9, 0xd9, 0x9c, 0xce, 0x72, 0x7b, 0x70, 0xee, 0x5f, 0xea, 0xa2, 0xdf, 0xa9, 0x14, 0x10, 0xf9, 0x6e, 0x59, 0x9f, 0x9c, 0xe0, 0x0c, 0xb2, 0x07, 0x97, 0xcd, 0xd2, 0x89, 0x16, 0xfd, 0x9c, 0xa8, 0xa5, + /* (2^375)P */ 0x5a, 0x61, 0xf1, 0x59, 0x7c, 0x38, 0xda, 0xe2, 0x85, 0x99, 0x68, 0xe9, 0xc9, 0xf7, 0x32, 0x7e, 0xc4, 0xca, 0xb7, 0x11, 0x08, 0x69, 0x2b, 0x66, 0x02, 0xf7, 0x2e, 0x18, 0xc3, 0x8e, 0xe1, 0xf9, 0xc5, 0x19, 0x9a, 0x0a, 0x9c, 0x07, 0xba, 0xc7, 0x9c, 0x03, 0x34, 0x89, 0x99, 0x67, 0x0b, 0x16, 0x4b, 0x07, 0x36, 0x16, 0x36, 0x2c, 0xe2, 0xa1, + /* (2^376)P */ 0x70, 0x10, 0x91, 0x27, 0xa8, 0x24, 0x8e, 0x29, 0x04, 0x6f, 0x79, 0x1f, 0xd3, 0xa5, 0x68, 0xd3, 0x0b, 0x7d, 0x56, 0x4d, 0x14, 0x57, 0x7b, 0x2e, 0x00, 0x9f, 0x9a, 0xfd, 0x6c, 0x63, 0x18, 0x81, 0xdb, 0x9d, 0xb7, 0xd7, 0xa4, 0x1e, 0xe8, 0x40, 0xf1, 0x4c, 0xa3, 0x01, 0xd5, 0x4b, 0x75, 0xea, 0xdd, 0x97, 0xfd, 0x5b, 0xb2, 0x66, 0x6a, 0x24, + /* (2^377)P */ 0x72, 0x11, 0xfe, 0x73, 0x1b, 0xd3, 0xea, 0x7f, 0x93, 0x15, 0x15, 0x05, 0xfe, 0x40, 0xe8, 0x28, 0xd8, 0x50, 0x47, 0x66, 0xfa, 0xb7, 0xb5, 0x04, 0xba, 0x35, 0x1e, 0x32, 0x9f, 0x5f, 0x32, 0xba, 0x3d, 0xd1, 0xed, 0x9a, 0x76, 0xca, 0xa3, 0x3e, 0x77, 0xd8, 0xd8, 0x7c, 0x5f, 0x68, 0x42, 0xb5, 0x86, 0x7f, 0x3b, 0xc9, 0xc1, 0x89, 0x64, 0xda, + /* (2^378)P */ 0xd5, 0xd4, 0x17, 0x31, 0xfc, 0x6a, 0xfd, 0xb8, 0xe8, 0xe5, 0x3e, 0x39, 0x06, 0xe4, 0xd1, 0x90, 0x2a, 0xca, 0xf6, 0x54, 0x6c, 0x1b, 0x2f, 0x49, 0x97, 0xb1, 0x2a, 0x82, 0x43, 0x3d, 0x1f, 0x8b, 0xe2, 0x47, 0xc5, 0x24, 0xa8, 0xd5, 0x53, 0x29, 0x7d, 0xc6, 0x87, 0xa6, 0x25, 0x3a, 0x64, 0xdd, 0x71, 0x08, 0x9e, 0xcd, 0xe9, 0x45, 0xc7, 0xba, + /* (2^379)P */ 0x37, 0x72, 0x6d, 0x13, 0x7a, 0x8d, 0x04, 0x31, 0xe6, 0xe3, 0x9e, 0x36, 0x71, 0x3e, 0xc0, 0x1e, 0xe3, 0x71, 0xd3, 0x49, 0x4e, 0x4a, 0x36, 0x42, 0x68, 0x68, 0x61, 0xc7, 0x3c, 0xdb, 0x81, 0x49, 0xf7, 0x91, 0x4d, 0xea, 0x4c, 0x4f, 0x98, 0xc6, 0x7e, 0x60, 0x84, 0x4b, 0x6a, 0x37, 0xbb, 0x52, 0xf7, 0xce, 0x02, 0xe4, 0xad, 0xd1, 0x3c, 0xa7, + /* (2^380)P */ 0x51, 0x06, 0x2d, 0xf8, 0x08, 0xe8, 0xf1, 0x0c, 0xe5, 0xa9, 0xac, 0x29, 0x73, 0x3b, 0xed, 0x98, 0x5f, 0x55, 0x08, 0x38, 0x51, 0x44, 0x36, 0x5d, 0xea, 0xc3, 0xb8, 0x0e, 0xa0, 0x4f, 0xd2, 0x79, 0xe9, 0x98, 0xc3, 0xf5, 0x00, 0xb9, 0x26, 0x27, 0x42, 0xa8, 0x07, 0xc1, 0x12, 0x31, 0xc1, 0xc3, 0x3c, 0x3b, 0x7a, 0x72, 0x97, 0xc2, 0x70, 0x3a, + /* (2^381)P */ 0xf4, 0xb2, 0xba, 0x32, 0xbc, 0xa9, 0x2f, 0x87, 0xc7, 0x3c, 0x45, 0xcd, 0xae, 0xe2, 0x13, 0x6d, 0x3a, 0xf2, 0xf5, 0x66, 0x97, 0x29, 0xaf, 0x53, 0x9f, 0xda, 0xea, 0x14, 0xdf, 0x04, 0x98, 0x19, 0x95, 0x9e, 0x2a, 0x00, 0x5c, 0x9d, 0x1d, 0xf0, 0x39, 0x23, 0xff, 0xfc, 0xca, 0x36, 0xb7, 0xde, 0xdf, 0x37, 0x78, 0x52, 0x21, 0xfa, 0x19, 0x10, + /* (2^382)P */ 0x50, 0x20, 0x73, 0x74, 0x62, 0x21, 0xf2, 0xf7, 0x9b, 0x66, 0x85, 0x34, 0x74, 0xd4, 0x9d, 0x60, 0xd7, 0xbc, 0xc8, 0x46, 0x3b, 0xb8, 0x80, 0x42, 0x15, 0x0a, 0x6c, 0x35, 0x1a, 0x69, 0xf0, 0x1d, 0x4b, 0x29, 0x54, 0x5a, 0x9a, 0x48, 0xec, 0x9f, 0x37, 0x74, 0x91, 0xd0, 0xd1, 0x9e, 0x00, 0xc2, 0x76, 0x56, 0xd6, 0xa0, 0x15, 0x14, 0x83, 0x59, + /* (2^383)P */ 0xc2, 0xf8, 0x22, 0x20, 0x23, 0x07, 0xbd, 0x1d, 0x6f, 0x1e, 0x8c, 0x56, 0x06, 0x6a, 0x4b, 0x9f, 0xe2, 0xa9, 0x92, 0x46, 0x4b, 0x46, 0x59, 0xd7, 0xe1, 0xda, 0x14, 0x98, 0x07, 0x65, 0x7e, 0x28, 0x20, 0xf2, 0x9d, 0x4f, 0x36, 0x5c, 0x92, 0xe0, 0x9d, 0xfe, 0x3e, 0xda, 0xe4, 0x47, 0x19, 0x3c, 0x00, 0x7f, 0x22, 0xf2, 0x9e, 0x51, 0xae, 0x4d, + /* (2^384)P */ 0xbe, 0x8c, 0x1b, 0x10, 0xb6, 0xad, 0xcc, 0xcc, 0xd8, 0x5e, 0x21, 0xa6, 0xfb, 0xf1, 0xf6, 0xbd, 0x0a, 0x24, 0x67, 0xb4, 0x57, 0x7a, 0xbc, 0xe8, 0xe9, 0xff, 0xee, 0x0a, 0x1f, 0xee, 0xbd, 0xc8, 0x44, 0xed, 0x2b, 0xbb, 0x55, 0x1f, 0xdd, 0x7c, 0xb3, 0xeb, 0x3f, 0x63, 0xa1, 0x28, 0x91, 0x21, 0xab, 0x71, 0xc6, 0x4c, 0xd0, 0xe9, 0xb0, 0x21, + /* (2^385)P */ 0xad, 0xc9, 0x77, 0x2b, 0xee, 0x89, 0xa4, 0x7b, 0xfd, 0xf9, 0xf6, 0x14, 0xe4, 0xed, 0x1a, 0x16, 0x9b, 0x78, 0x41, 0x43, 0xa8, 0x83, 0x72, 0x06, 0x2e, 0x7c, 0xdf, 0xeb, 0x7e, 0xdd, 0xd7, 0x8b, 0xea, 0x9a, 0x2b, 0x03, 0xba, 0x57, 0xf3, 0xf1, 0xd9, 0xe5, 0x09, 0xc5, 0x98, 0x61, 0x1c, 0x51, 0x6d, 0x5d, 0x6e, 0xfb, 0x5e, 0x95, 0x9f, 0xb5, + /* (2^386)P */ 0x23, 0xe2, 0x1e, 0x95, 0xa3, 0x5e, 0x42, 0x10, 0xc7, 0xc3, 0x70, 0xbf, 0x4b, 0x6b, 0x83, 0x36, 0x93, 0xb7, 0x68, 0x47, 0x88, 0x3a, 0x10, 0x88, 0x48, 0x7f, 0x8c, 0xae, 0x54, 0x10, 0x02, 0xa4, 0x52, 0x8f, 0x8d, 0xf7, 0x26, 0x4f, 0x50, 0xc3, 0x6a, 0xe2, 0x4e, 0x3b, 0x4c, 0xb9, 0x8a, 0x14, 0x15, 0x6d, 0x21, 0x29, 0xb3, 0x6e, 0x4e, 0xd0, + /* (2^387)P */ 0x4c, 0x8a, 0x18, 0x3f, 0xb7, 0x20, 0xfd, 0x3e, 0x54, 0xca, 0x68, 0x3c, 0xea, 0x6f, 0xf4, 0x6b, 0xa2, 0xbd, 0x01, 0xbd, 0xfe, 0x08, 0xa8, 0xd8, 0xc2, 0x20, 0x36, 0x05, 0xcd, 0xe9, 0xf3, 0x9e, 0xfa, 0x85, 0x66, 0x8f, 0x4b, 0x1d, 0x8c, 0x64, 0x4f, 0xb8, 0xc6, 0x0f, 0x5b, 0x57, 0xd8, 0x24, 0x19, 0x5a, 0x14, 0x4b, 0x92, 0xd3, 0x96, 0xbc, + /* (2^388)P */ 0xa9, 0x3f, 0xc9, 0x6c, 0xca, 0x64, 0x1e, 0x6f, 0xdf, 0x65, 0x7f, 0x9a, 0x47, 0x6b, 0x8a, 0x60, 0x31, 0xa6, 0x06, 0xac, 0x69, 0x30, 0xe6, 0xea, 0x63, 0x42, 0x26, 0x5f, 0xdb, 0xd0, 0xf2, 0x8e, 0x34, 0x0a, 0x3a, 0xeb, 0xf3, 0x79, 0xc8, 0xb7, 0x60, 0x56, 0x5c, 0x37, 0x95, 0x71, 0xf8, 0x7f, 0x49, 0x3e, 0x9e, 0x01, 0x26, 0x1e, 0x80, 0x9f, + /* (2^389)P */ 0xf8, 0x16, 0x9a, 0xaa, 0xb0, 0x28, 0xb5, 0x8e, 0xd0, 0x60, 0xe5, 0x26, 0xa9, 0x47, 0xc4, 0x5c, 0xa9, 0x39, 0xfe, 0x0a, 0xd8, 0x07, 0x2b, 0xb3, 0xce, 0xf1, 0xea, 0x1a, 0xf4, 0x7b, 0x98, 0x31, 0x3d, 0x13, 0x29, 0x80, 0xe8, 0x0d, 0xcf, 0x56, 0x39, 0x86, 0x50, 0x0c, 0xb3, 0x18, 0xf4, 0xc5, 0xca, 0xf2, 0x6f, 0xcd, 0x8d, 0xd5, 0x02, 0xb0, + /* (2^390)P */ 0xbf, 0x39, 0x3f, 0xac, 0x6d, 0x1a, 0x6a, 0xe4, 0x42, 0x24, 0xd6, 0x41, 0x9d, 0xb9, 0x5b, 0x46, 0x73, 0x93, 0x76, 0xaa, 0xb7, 0x37, 0x36, 0xa6, 0x09, 0xe5, 0x04, 0x3b, 0x66, 0xc4, 0x29, 0x3e, 0x41, 0xc2, 0xcb, 0xe5, 0x17, 0xd7, 0x34, 0x67, 0x1d, 0x2c, 0x12, 0xec, 0x24, 0x7a, 0x40, 0xa2, 0x45, 0x41, 0xf0, 0x75, 0xed, 0x43, 0x30, 0xc9, + /* (2^391)P */ 0x80, 0xf6, 0x47, 0x5b, 0xad, 0x54, 0x02, 0xbc, 0xdd, 0xa4, 0xb2, 0xd7, 0x42, 0x95, 0xf2, 0x0d, 0x1b, 0xef, 0x37, 0xa7, 0xb4, 0x34, 0x04, 0x08, 0x71, 0x1b, 0xd3, 0xdf, 0xa1, 0xf0, 0x2b, 0xfa, 0xc0, 0x1f, 0xf3, 0x44, 0xb5, 0xc6, 0x47, 0x3d, 0x65, 0x67, 0x45, 0x4d, 0x2f, 0xde, 0x52, 0x73, 0xfc, 0x30, 0x01, 0x6b, 0xc1, 0x03, 0xd8, 0xd7, + /* (2^392)P */ 0x1c, 0x67, 0x55, 0x3e, 0x01, 0x17, 0x0f, 0x3e, 0xe5, 0x34, 0x58, 0xfc, 0xcb, 0x71, 0x24, 0x74, 0x5d, 0x36, 0x1e, 0x89, 0x2a, 0x63, 0xf8, 0xf8, 0x9f, 0x50, 0x9f, 0x32, 0x92, 0x29, 0xd8, 0x1a, 0xec, 0x76, 0x57, 0x6c, 0x67, 0x12, 0x6a, 0x6e, 0xef, 0x97, 0x1f, 0xc3, 0x77, 0x60, 0x3c, 0x22, 0xcb, 0xc7, 0x04, 0x1a, 0x89, 0x2d, 0x10, 0xa6, + /* (2^393)P */ 0x12, 0xf5, 0xa9, 0x26, 0x16, 0xd9, 0x3c, 0x65, 0x5d, 0x83, 0xab, 0xd1, 0x70, 0x6b, 0x1c, 0xdb, 0xe7, 0x86, 0x0d, 0xfb, 0xe7, 0xf8, 0x2a, 0x58, 0x6e, 0x7a, 0x66, 0x13, 0x53, 0x3a, 0x6f, 0x8d, 0x43, 0x5f, 0x14, 0x23, 0x14, 0xff, 0x3d, 0x52, 0x7f, 0xee, 0xbd, 0x7a, 0x34, 0x8b, 0x35, 0x24, 0xc3, 0x7a, 0xdb, 0xcf, 0x22, 0x74, 0x9a, 0x8f, + /* (2^394)P */ 0xdb, 0x20, 0xfc, 0xe5, 0x39, 0x4e, 0x7d, 0x78, 0xee, 0x0b, 0xbf, 0x1d, 0x80, 0xd4, 0x05, 0x4f, 0xb9, 0xd7, 0x4e, 0x94, 0x88, 0x9a, 0x50, 0x78, 0x1a, 0x70, 0x8c, 0xcc, 0x25, 0xb6, 0x61, 0x09, 0xdc, 0x7b, 0xea, 0x3f, 0x7f, 0xea, 0x2a, 0x0d, 0x47, 0x1c, 0x8e, 0xa6, 0x5b, 0xd2, 0xa3, 0x61, 0x93, 0x3c, 0x68, 0x9f, 0x8b, 0xea, 0xb0, 0xcb, + /* (2^395)P */ 0xff, 0x54, 0x02, 0x19, 0xae, 0x8b, 0x4c, 0x2c, 0x3a, 0xe0, 0xe4, 0xac, 0x87, 0xf7, 0x51, 0x45, 0x41, 0x43, 0xdc, 0xaa, 0xcd, 0xcb, 0xdc, 0x40, 0xe3, 0x44, 0x3b, 0x1d, 0x9e, 0x3d, 0xb9, 0x82, 0xcc, 0x7a, 0xc5, 0x12, 0xf8, 0x1e, 0xdd, 0xdb, 0x8d, 0xb0, 0x2a, 0xe8, 0xe6, 0x6c, 0x94, 0x3b, 0xb7, 0x2d, 0xba, 0x79, 0x3b, 0xb5, 0x86, 0xfb, + /* (2^396)P */ 0x82, 0x88, 0x13, 0xdd, 0x6c, 0xcd, 0x85, 0x2b, 0x90, 0x86, 0xb7, 0xac, 0x16, 0xa6, 0x6e, 0x6a, 0x94, 0xd8, 0x1e, 0x4e, 0x41, 0x0f, 0xce, 0x81, 0x6a, 0xa8, 0x26, 0x56, 0x43, 0x52, 0x52, 0xe6, 0xff, 0x88, 0xcf, 0x47, 0x05, 0x1d, 0xff, 0xf3, 0xa0, 0x10, 0xb2, 0x97, 0x87, 0xeb, 0x47, 0xbb, 0xfa, 0x1f, 0xe8, 0x4c, 0xce, 0xc4, 0xcd, 0x93, + /* (2^397)P */ 0xf4, 0x11, 0xf5, 0x8d, 0x89, 0x29, 0x79, 0xb3, 0x59, 0x0b, 0x29, 0x7d, 0x9c, 0x12, 0x4a, 0x65, 0x72, 0x3a, 0xf9, 0xec, 0x37, 0x18, 0x86, 0xef, 0x44, 0x07, 0x25, 0x74, 0x76, 0x53, 0xed, 0x51, 0x01, 0xc6, 0x28, 0xc5, 0xc3, 0x4a, 0x0f, 0x99, 0xec, 0xc8, 0x40, 0x5a, 0x83, 0x30, 0x79, 0xa2, 0x3e, 0x63, 0x09, 0x2d, 0x6f, 0x23, 0x54, 0x1c, + /* (2^398)P */ 0x5c, 0x6f, 0x3b, 0x1c, 0x30, 0x77, 0x7e, 0x87, 0x66, 0x83, 0x2e, 0x7e, 0x85, 0x50, 0xfd, 0xa0, 0x7a, 0xc2, 0xf5, 0x0f, 0xc1, 0x64, 0xe7, 0x0b, 0xbd, 0x59, 0xa7, 0xe7, 0x65, 0x53, 0xc3, 0xf5, 0x55, 0x5b, 0xe1, 0x82, 0x30, 0x5a, 0x61, 0xcd, 0xa0, 0x89, 0x32, 0xdb, 0x87, 0xfc, 0x21, 0x8a, 0xab, 0x6d, 0x82, 0xa8, 0x42, 0x81, 0x4f, 0xf2, + /* (2^399)P */ 0xb3, 0xeb, 0x88, 0x18, 0xf6, 0x56, 0x96, 0xbf, 0xba, 0x5d, 0x71, 0xa1, 0x5a, 0xd1, 0x04, 0x7b, 0xd5, 0x46, 0x01, 0x74, 0xfe, 0x15, 0x25, 0xb7, 0xff, 0x0c, 0x24, 0x47, 0xac, 0xfd, 0xab, 0x47, 0x32, 0xe1, 0x6a, 0x4e, 0xca, 0xcf, 0x7f, 0xdd, 0xf8, 0xd2, 0x4b, 0x3b, 0xf5, 0x17, 0xba, 0xba, 0x8b, 0xa1, 0xec, 0x28, 0x3f, 0x97, 0xab, 0x2a, + /* (2^400)P */ 0x51, 0x38, 0xc9, 0x5e, 0xc6, 0xb3, 0x64, 0xf2, 0x24, 0x4d, 0x04, 0x7d, 0xc8, 0x39, 0x0c, 0x4a, 0xc9, 0x73, 0x74, 0x1b, 0x5c, 0xb2, 0xc5, 0x41, 0x62, 0xa0, 0x4c, 0x6d, 0x8d, 0x91, 0x9a, 0x7b, 0x88, 0xab, 0x9c, 0x7e, 0x23, 0xdb, 0x6f, 0xb5, 0x72, 0xd6, 0x47, 0x40, 0xef, 0x22, 0x58, 0x62, 0x19, 0x6c, 0x38, 0xba, 0x5b, 0x00, 0x30, 0x9f, + /* (2^401)P */ 0x65, 0xbb, 0x3b, 0x9b, 0xe9, 0xae, 0xbf, 0xbe, 0xe4, 0x13, 0x95, 0xf3, 0xe3, 0x77, 0xcb, 0xe4, 0x9a, 0x22, 0xb5, 0x4a, 0x08, 0x9d, 0xb3, 0x9e, 0x27, 0xe0, 0x15, 0x6c, 0x9f, 0x7e, 0x9a, 0x5e, 0x15, 0x45, 0x25, 0x8d, 0x01, 0x0a, 0xd2, 0x2b, 0xbd, 0x48, 0x06, 0x0d, 0x18, 0x97, 0x4b, 0xdc, 0xbc, 0xf0, 0xcd, 0xb2, 0x52, 0x3c, 0xac, 0xf5, + /* (2^402)P */ 0x3e, 0xed, 0x47, 0x6b, 0x5c, 0xf6, 0x76, 0xd0, 0xe9, 0x15, 0xa3, 0xcb, 0x36, 0x00, 0x21, 0xa3, 0x79, 0x20, 0xa5, 0x3e, 0x88, 0x03, 0xcb, 0x7e, 0x63, 0xbb, 0xed, 0xa9, 0x13, 0x35, 0x16, 0xaf, 0x2e, 0xb4, 0x70, 0x14, 0x93, 0xfb, 0xc4, 0x9b, 0xd8, 0xb1, 0xbe, 0x43, 0xd1, 0x85, 0xb8, 0x97, 0xef, 0xea, 0x88, 0xa1, 0x25, 0x52, 0x62, 0x75, + /* (2^403)P */ 0x8e, 0x4f, 0xaa, 0x23, 0x62, 0x7e, 0x2b, 0x37, 0x89, 0x00, 0x11, 0x30, 0xc5, 0x33, 0x4a, 0x89, 0x8a, 0xe2, 0xfc, 0x5c, 0x6a, 0x75, 0xe5, 0xf7, 0x02, 0x4a, 0x9b, 0xf7, 0xb5, 0x6a, 0x85, 0x31, 0xd3, 0x5a, 0xcf, 0xc3, 0xf8, 0xde, 0x2f, 0xcf, 0xb5, 0x24, 0xf4, 0xe3, 0xa1, 0xad, 0x42, 0xae, 0x09, 0xb9, 0x2e, 0x04, 0x2d, 0x01, 0x22, 0x3f, + /* (2^404)P */ 0x41, 0x16, 0xfb, 0x7d, 0x50, 0xfd, 0xb5, 0xba, 0x88, 0x24, 0xba, 0xfd, 0x3d, 0xb2, 0x90, 0x15, 0xb7, 0xfa, 0xa2, 0xe1, 0x4c, 0x7d, 0xb9, 0xc6, 0xff, 0x81, 0x57, 0xb6, 0xc2, 0x9e, 0xcb, 0xc4, 0x35, 0xbd, 0x01, 0xb7, 0xaa, 0xce, 0xd0, 0xe9, 0xb5, 0xd6, 0x72, 0xbf, 0xd2, 0xee, 0xc7, 0xac, 0x94, 0xff, 0x29, 0x57, 0x02, 0x49, 0x09, 0xad, + /* (2^405)P */ 0x27, 0xa5, 0x78, 0x1b, 0xbf, 0x6b, 0xaf, 0x0b, 0x8c, 0xd9, 0xa8, 0x37, 0xb0, 0x67, 0x18, 0xb6, 0xc7, 0x05, 0x8a, 0x67, 0x03, 0x30, 0x62, 0x6e, 0x56, 0x82, 0xa9, 0x54, 0x3e, 0x0c, 0x4e, 0x07, 0xe1, 0x5a, 0x38, 0xed, 0xfa, 0xc8, 0x55, 0x6b, 0x08, 0xa3, 0x6b, 0x64, 0x2a, 0x15, 0xd6, 0x39, 0x6f, 0x47, 0x99, 0x42, 0x3f, 0x33, 0x84, 0x8f, + /* (2^406)P */ 0xbc, 0x45, 0x29, 0x81, 0x0e, 0xa4, 0xc5, 0x72, 0x3a, 0x10, 0xe1, 0xc4, 0x1e, 0xda, 0xc3, 0xfe, 0xb0, 0xce, 0xd2, 0x13, 0x34, 0x67, 0x21, 0xc6, 0x7e, 0xf9, 0x8c, 0xff, 0x39, 0x50, 0xae, 0x92, 0x60, 0x35, 0x2f, 0x8b, 0x6e, 0xc9, 0xc1, 0x27, 0x3a, 0x94, 0x66, 0x3e, 0x26, 0x84, 0x93, 0xc8, 0x6c, 0xcf, 0xd2, 0x03, 0xa1, 0x10, 0xcf, 0xb7, + /* (2^407)P */ 0x64, 0xda, 0x19, 0xf6, 0xc5, 0x73, 0x17, 0x44, 0x88, 0x81, 0x07, 0x0d, 0x34, 0xb2, 0x75, 0xf9, 0xd9, 0xe2, 0xe0, 0x8b, 0x71, 0xcf, 0x72, 0x34, 0x83, 0xb4, 0xce, 0xfc, 0xd7, 0x29, 0x09, 0x5a, 0x98, 0xbf, 0x14, 0xac, 0x77, 0x55, 0x38, 0x47, 0x5b, 0x0f, 0x40, 0x24, 0xe5, 0xa5, 0xa6, 0xac, 0x2d, 0xa6, 0xff, 0x9c, 0x73, 0xfe, 0x5c, 0x7e, + /* (2^408)P */ 0x1e, 0x33, 0xcc, 0x68, 0xb2, 0xbc, 0x8c, 0x93, 0xaf, 0xcc, 0x38, 0xf8, 0xd9, 0x16, 0x72, 0x50, 0xac, 0xd9, 0xb5, 0x0b, 0x9a, 0xbe, 0x46, 0x7a, 0xf1, 0xee, 0xf1, 0xad, 0xec, 0x5b, 0x59, 0x27, 0x9c, 0x05, 0xa3, 0x87, 0xe0, 0x37, 0x2c, 0x83, 0xce, 0xb3, 0x65, 0x09, 0x8e, 0xc3, 0x9c, 0xbf, 0x6a, 0xa2, 0x00, 0xcc, 0x12, 0x36, 0xc5, 0x95, + /* (2^409)P */ 0x36, 0x11, 0x02, 0x14, 0x9c, 0x3c, 0xeb, 0x2f, 0x23, 0x5b, 0x6b, 0x2b, 0x08, 0x54, 0x53, 0xac, 0xb2, 0xa3, 0xe0, 0x26, 0x62, 0x3c, 0xe4, 0xe1, 0x81, 0xee, 0x13, 0x3e, 0xa4, 0x97, 0xef, 0xf9, 0x92, 0x27, 0x01, 0xce, 0x54, 0x8b, 0x3e, 0x31, 0xbe, 0xa7, 0x88, 0xcf, 0x47, 0x99, 0x3c, 0x10, 0x6f, 0x60, 0xb3, 0x06, 0x4e, 0xee, 0x1b, 0xf0, + /* (2^410)P */ 0x59, 0x49, 0x66, 0xcf, 0x22, 0xe6, 0xf6, 0x73, 0xfe, 0xa3, 0x1c, 0x09, 0xfa, 0x5f, 0x65, 0xa8, 0xf0, 0x82, 0xc2, 0xef, 0x16, 0x63, 0x6e, 0x79, 0x69, 0x51, 0x39, 0x07, 0x65, 0xc4, 0x81, 0xec, 0x73, 0x0f, 0x15, 0x93, 0xe1, 0x30, 0x33, 0xe9, 0x37, 0x86, 0x42, 0x4c, 0x1f, 0x9b, 0xad, 0xee, 0x3f, 0xf1, 0x2a, 0x8e, 0x6a, 0xa3, 0xc8, 0x35, + /* (2^411)P */ 0x1e, 0x49, 0xf1, 0xdd, 0xd2, 0x9c, 0x8e, 0x78, 0xb2, 0x06, 0xe4, 0x6a, 0xab, 0x3a, 0xdc, 0xcd, 0xf4, 0xeb, 0xe1, 0xe7, 0x2f, 0xaa, 0xeb, 0x40, 0x31, 0x9f, 0xb9, 0xab, 0x13, 0xa9, 0x78, 0xbf, 0x38, 0x89, 0x0e, 0x85, 0x14, 0x8b, 0x46, 0x76, 0x14, 0xda, 0xcf, 0x33, 0xc8, 0x79, 0xd3, 0xd5, 0xa3, 0x6a, 0x69, 0x45, 0x70, 0x34, 0xc3, 0xe9, + /* (2^412)P */ 0x5e, 0xe7, 0x78, 0xe9, 0x24, 0xcc, 0xe9, 0xf4, 0xc8, 0x6b, 0xe0, 0xfb, 0x3a, 0xbe, 0xcc, 0x42, 0x4a, 0x00, 0x22, 0xf8, 0xe6, 0x32, 0xbe, 0x6d, 0x18, 0x55, 0x60, 0xe9, 0x72, 0x69, 0x50, 0x56, 0xca, 0x04, 0x18, 0x38, 0xa1, 0xee, 0xd8, 0x38, 0x3c, 0xa7, 0x70, 0xe2, 0xb9, 0x4c, 0xa0, 0xc8, 0x89, 0x72, 0xcf, 0x49, 0x7f, 0xdf, 0xbc, 0x67, + /* (2^413)P */ 0x1d, 0x17, 0xcb, 0x0b, 0xbd, 0xb2, 0x36, 0xe3, 0xa8, 0x99, 0x31, 0xb6, 0x26, 0x9c, 0x0c, 0x74, 0xaf, 0x4d, 0x24, 0x61, 0xcf, 0x31, 0x7b, 0xed, 0xdd, 0xc3, 0xf6, 0x32, 0x70, 0xfe, 0x17, 0xf6, 0x51, 0x37, 0x65, 0xce, 0x5d, 0xaf, 0xa5, 0x2f, 0x2a, 0xfe, 0x00, 0x71, 0x7c, 0x50, 0xbe, 0x21, 0xc7, 0xed, 0xc6, 0xfc, 0x67, 0xcf, 0x9c, 0xdd, + /* (2^414)P */ 0x26, 0x3e, 0xf8, 0xbb, 0xd0, 0xb1, 0x01, 0xd8, 0xeb, 0x0b, 0x62, 0x87, 0x35, 0x4c, 0xde, 0xca, 0x99, 0x9c, 0x6d, 0xf7, 0xb6, 0xf0, 0x57, 0x0a, 0x52, 0x29, 0x6a, 0x3f, 0x26, 0x31, 0x04, 0x07, 0x2a, 0xc9, 0xfa, 0x9b, 0x0e, 0x62, 0x8e, 0x72, 0xf2, 0xad, 0xce, 0xb6, 0x35, 0x7a, 0xc1, 0xae, 0x35, 0xc7, 0xa3, 0x14, 0xcf, 0x0c, 0x28, 0xb7, + /* (2^415)P */ 0xa6, 0xf1, 0x32, 0x3a, 0x20, 0xd2, 0x24, 0x97, 0xcf, 0x5d, 0x37, 0x99, 0xaf, 0x33, 0x7a, 0x5b, 0x7a, 0xcc, 0x4e, 0x41, 0x38, 0xb1, 0x4e, 0xad, 0xc9, 0xd9, 0x71, 0x7e, 0xb2, 0xf5, 0xd5, 0x01, 0x6c, 0x4d, 0xfd, 0xa1, 0xda, 0x03, 0x38, 0x9b, 0x3d, 0x92, 0x92, 0xf2, 0xca, 0xbf, 0x1f, 0x24, 0xa4, 0xbb, 0x30, 0x6a, 0x74, 0x56, 0xc8, 0xce, + /* (2^416)P */ 0x27, 0xf4, 0xed, 0xc9, 0xc3, 0xb1, 0x79, 0x85, 0xbe, 0xf6, 0xeb, 0xf3, 0x55, 0xc7, 0xaa, 0xa6, 0xe9, 0x07, 0x5d, 0xf4, 0xeb, 0xa6, 0x81, 0xe3, 0x0e, 0xcf, 0xa3, 0xc1, 0xef, 0xe7, 0x34, 0xb2, 0x03, 0x73, 0x8a, 0x91, 0xf1, 0xad, 0x05, 0xc7, 0x0b, 0x43, 0x99, 0x12, 0x31, 0xc8, 0xc7, 0xc5, 0xa4, 0x3d, 0xcd, 0xe5, 0x4e, 0x6d, 0x24, 0xdd, + /* (2^417)P */ 0x61, 0x54, 0xd0, 0x95, 0x2c, 0x45, 0x75, 0xac, 0xb5, 0x1a, 0x9d, 0x11, 0xeb, 0xed, 0x6b, 0x57, 0xa3, 0xe6, 0xcd, 0x77, 0xd4, 0x83, 0x8e, 0x39, 0xf1, 0x0f, 0x98, 0xcb, 0x40, 0x02, 0x6e, 0x10, 0x82, 0x9e, 0xb4, 0x93, 0x76, 0xd7, 0x97, 0xa3, 0x53, 0x12, 0x86, 0xc6, 0x15, 0x78, 0x73, 0x93, 0xe7, 0x7f, 0xcf, 0x1f, 0xbf, 0xcd, 0xd2, 0x7a, + /* (2^418)P */ 0xc2, 0x21, 0xdc, 0xd5, 0x69, 0xff, 0xca, 0x49, 0x3a, 0xe1, 0xc3, 0x69, 0x41, 0x56, 0xc1, 0x76, 0x63, 0x24, 0xbd, 0x64, 0x1b, 0x3d, 0x92, 0xf9, 0x13, 0x04, 0x25, 0xeb, 0x27, 0xa6, 0xef, 0x39, 0x3a, 0x80, 0xe0, 0xf8, 0x27, 0xee, 0xc9, 0x49, 0x77, 0xef, 0x3f, 0x29, 0x3d, 0x5e, 0xe6, 0x66, 0x83, 0xd1, 0xf6, 0xfe, 0x9d, 0xbc, 0xf1, 0x96, + /* (2^419)P */ 0x6b, 0xc6, 0x99, 0x26, 0x3c, 0xf3, 0x63, 0xf9, 0xc7, 0x29, 0x8c, 0x52, 0x62, 0x2d, 0xdc, 0x8a, 0x66, 0xce, 0x2c, 0xa7, 0xe4, 0xf0, 0xd7, 0x37, 0x17, 0x1e, 0xe4, 0xa3, 0x53, 0x7b, 0x29, 0x8e, 0x60, 0x99, 0xf9, 0x0c, 0x7c, 0x6f, 0xa2, 0xcc, 0x9f, 0x80, 0xdd, 0x5e, 0x46, 0xaa, 0x0d, 0x6c, 0xc9, 0x6c, 0xf7, 0x78, 0x5b, 0x38, 0xe3, 0x24, + /* (2^420)P */ 0x4b, 0x75, 0x6a, 0x2f, 0x08, 0xe1, 0x72, 0x76, 0xab, 0x82, 0x96, 0xdf, 0x3b, 0x1f, 0x9b, 0xd8, 0xed, 0xdb, 0xcd, 0x15, 0x09, 0x5a, 0x1e, 0xb7, 0xc5, 0x26, 0x72, 0x07, 0x0c, 0x50, 0xcd, 0x3b, 0x4d, 0x3f, 0xa2, 0x67, 0xc2, 0x02, 0x61, 0x2e, 0x68, 0xe9, 0x6f, 0xf0, 0x21, 0x2a, 0xa7, 0x3b, 0x88, 0x04, 0x11, 0x64, 0x49, 0x0d, 0xb4, 0x46, + /* (2^421)P */ 0x63, 0x85, 0xf3, 0xc5, 0x2b, 0x5a, 0x9f, 0xf0, 0x17, 0xcb, 0x45, 0x0a, 0xf3, 0x6e, 0x7e, 0xb0, 0x7c, 0xbc, 0xf0, 0x4f, 0x3a, 0xb0, 0xbc, 0x36, 0x36, 0x52, 0x51, 0xcb, 0xfe, 0x9a, 0xcb, 0xe8, 0x7e, 0x4b, 0x06, 0x7f, 0xaa, 0x35, 0xc8, 0x0e, 0x7a, 0x30, 0xa3, 0xb1, 0x09, 0xbb, 0x86, 0x4c, 0xbe, 0xb8, 0xbd, 0xe0, 0x32, 0xa5, 0xd4, 0xf7, + /* (2^422)P */ 0x7d, 0x50, 0x37, 0x68, 0x4e, 0x22, 0xb2, 0x2c, 0xd5, 0x0f, 0x2b, 0x6d, 0xb1, 0x51, 0xf2, 0x82, 0xe9, 0x98, 0x7c, 0x50, 0xc7, 0x96, 0x7e, 0x0e, 0xdc, 0xb1, 0x0e, 0xb2, 0x63, 0x8c, 0x30, 0x37, 0x72, 0x21, 0x9c, 0x61, 0xc2, 0xa7, 0x33, 0xd9, 0xb2, 0x63, 0x93, 0xd1, 0x6b, 0x6a, 0x73, 0xa5, 0x58, 0x80, 0xff, 0x04, 0xc7, 0x83, 0x21, 0x29, + /* (2^423)P */ 0x29, 0x04, 0xbc, 0x99, 0x39, 0xc9, 0x58, 0xc9, 0x6b, 0x17, 0xe8, 0x90, 0xb3, 0xe6, 0xa9, 0xb6, 0x28, 0x9b, 0xcb, 0x3b, 0x28, 0x90, 0x68, 0x71, 0xff, 0xcf, 0x08, 0x78, 0xc9, 0x8d, 0xa8, 0x4e, 0x43, 0xd1, 0x1c, 0x9e, 0xa4, 0xe3, 0xdf, 0xbf, 0x92, 0xf4, 0xf9, 0x41, 0xba, 0x4d, 0x1c, 0xf9, 0xdd, 0x74, 0x76, 0x1c, 0x6e, 0x3e, 0x94, 0x87, + /* (2^424)P */ 0xe4, 0xda, 0xc5, 0xd7, 0xfb, 0x87, 0xc5, 0x4d, 0x6b, 0x19, 0xaa, 0xb9, 0xbc, 0x8c, 0xf2, 0x8a, 0xd8, 0x5d, 0xdb, 0x4d, 0xef, 0xa6, 0xf2, 0x65, 0xf1, 0x22, 0x9c, 0xf1, 0x46, 0x30, 0x71, 0x7c, 0xe4, 0x53, 0x8e, 0x55, 0x2e, 0x9c, 0x9a, 0x31, 0x2a, 0xc3, 0xab, 0x0f, 0xde, 0xe4, 0xbe, 0xd8, 0x96, 0x50, 0x6e, 0x0c, 0x54, 0x49, 0xe6, 0xec, + /* (2^425)P */ 0x3c, 0x1d, 0x5a, 0xa5, 0xda, 0xad, 0xdd, 0xc2, 0xae, 0xac, 0x6f, 0x86, 0x75, 0x31, 0x91, 0x64, 0x45, 0x9d, 0xa4, 0xf0, 0x81, 0xf1, 0x0e, 0xba, 0x74, 0xaf, 0x7b, 0xcd, 0x6f, 0xfe, 0xac, 0x4e, 0xdb, 0x4e, 0x45, 0x35, 0x36, 0xc5, 0xc0, 0x6c, 0x3d, 0x64, 0xf4, 0xd8, 0x07, 0x62, 0xd1, 0xec, 0xf3, 0xfc, 0x93, 0xc9, 0x28, 0x0c, 0x2c, 0xf3, + /* (2^426)P */ 0x0c, 0x69, 0x2b, 0x5c, 0xb6, 0x41, 0x69, 0xf1, 0xa4, 0xf1, 0x5b, 0x75, 0x4c, 0x42, 0x8b, 0x47, 0xeb, 0x69, 0xfb, 0xa8, 0xe6, 0xf9, 0x7b, 0x48, 0x50, 0xaf, 0xd3, 0xda, 0xb2, 0x35, 0x10, 0xb5, 0x5b, 0x40, 0x90, 0x39, 0xc9, 0x07, 0x06, 0x73, 0x26, 0x20, 0x95, 0x01, 0xa4, 0x2d, 0xf0, 0xe7, 0x2e, 0x00, 0x7d, 0x41, 0x09, 0x68, 0x13, 0xc4, + /* (2^427)P */ 0xbe, 0x38, 0x78, 0xcf, 0xc9, 0x4f, 0x36, 0xca, 0x09, 0x61, 0x31, 0x3c, 0x57, 0x2e, 0xec, 0x17, 0xa4, 0x7d, 0x19, 0x2b, 0x9b, 0x5b, 0xbe, 0x8f, 0xd6, 0xc5, 0x2f, 0x86, 0xf2, 0x64, 0x76, 0x17, 0x00, 0x6e, 0x1a, 0x8c, 0x67, 0x1b, 0x68, 0xeb, 0x15, 0xa2, 0xd6, 0x09, 0x91, 0xdd, 0x23, 0x0d, 0x98, 0xb2, 0x10, 0x19, 0x55, 0x9b, 0x63, 0xf2, + /* (2^428)P */ 0x51, 0x1f, 0x93, 0xea, 0x2a, 0x3a, 0xfa, 0x41, 0xc0, 0x57, 0xfb, 0x74, 0xa6, 0x65, 0x09, 0x56, 0x14, 0xb6, 0x12, 0xaa, 0xb3, 0x1a, 0x8d, 0x3b, 0x76, 0x91, 0x7a, 0x23, 0x56, 0x9c, 0x6a, 0xc0, 0xe0, 0x3c, 0x3f, 0xb5, 0x1a, 0xf4, 0x57, 0x71, 0x93, 0x2b, 0xb1, 0xa7, 0x70, 0x57, 0x22, 0x80, 0xf5, 0xb8, 0x07, 0x77, 0x87, 0x0c, 0xbe, 0x83, + /* (2^429)P */ 0x07, 0x9b, 0x0e, 0x52, 0x38, 0x63, 0x13, 0x86, 0x6a, 0xa6, 0xb4, 0xd2, 0x60, 0x68, 0x9a, 0x99, 0x82, 0x0a, 0x04, 0x5f, 0x89, 0x7a, 0x1a, 0x2a, 0xae, 0x2d, 0x35, 0x0c, 0x1e, 0xad, 0xef, 0x4f, 0x9a, 0xfc, 0xc8, 0xd9, 0xcf, 0x9d, 0x48, 0x71, 0xa5, 0x55, 0x79, 0x73, 0x39, 0x1b, 0xd8, 0x73, 0xec, 0x9b, 0x03, 0x16, 0xd8, 0x82, 0xf7, 0x67, + /* (2^430)P */ 0x52, 0x67, 0x42, 0x21, 0xc9, 0x40, 0x78, 0x82, 0x2b, 0x95, 0x2d, 0x20, 0x92, 0xd1, 0xe2, 0x61, 0x25, 0xb0, 0xc6, 0x9c, 0x20, 0x59, 0x8e, 0x28, 0x6f, 0xf3, 0xfd, 0xd3, 0xc1, 0x32, 0x43, 0xc9, 0xa6, 0x08, 0x7a, 0x77, 0x9c, 0x4c, 0x8c, 0x33, 0x71, 0x13, 0x69, 0xe3, 0x52, 0x30, 0xa7, 0xf5, 0x07, 0x67, 0xac, 0xad, 0x46, 0x8a, 0x26, 0x25, + /* (2^431)P */ 0xda, 0x86, 0xc4, 0xa2, 0x71, 0x56, 0xdd, 0xd2, 0x48, 0xd3, 0xde, 0x42, 0x63, 0x01, 0xa7, 0x2c, 0x92, 0x83, 0x6f, 0x2e, 0xd8, 0x1e, 0x3f, 0xc1, 0xc5, 0x42, 0x4e, 0x34, 0x19, 0x54, 0x6e, 0x35, 0x2c, 0x51, 0x2e, 0xfd, 0x0f, 0x9a, 0x45, 0x66, 0x5e, 0x4a, 0x83, 0xda, 0x0a, 0x53, 0x68, 0x63, 0xfa, 0xce, 0x47, 0x20, 0xd3, 0x34, 0xba, 0x0d, + /* (2^432)P */ 0xd0, 0xe9, 0x64, 0xa4, 0x61, 0x4b, 0x86, 0xe5, 0x93, 0x6f, 0xda, 0x0e, 0x31, 0x7e, 0x6e, 0xe3, 0xc6, 0x73, 0xd8, 0xa3, 0x08, 0x57, 0x52, 0xcd, 0x51, 0x63, 0x1d, 0x9f, 0x93, 0x00, 0x62, 0x91, 0x26, 0x21, 0xa7, 0xdd, 0x25, 0x0f, 0x09, 0x0d, 0x35, 0xad, 0xcf, 0x11, 0x8e, 0x6e, 0xe8, 0xae, 0x1d, 0x95, 0xcb, 0x88, 0xf8, 0x70, 0x7b, 0x91, + /* (2^433)P */ 0x0c, 0x19, 0x5c, 0xd9, 0x8d, 0xda, 0x9d, 0x2c, 0x90, 0x54, 0x65, 0xe8, 0xb6, 0x35, 0x50, 0xae, 0xea, 0xae, 0x43, 0xb7, 0x1e, 0x99, 0x8b, 0x4c, 0x36, 0x4e, 0xe4, 0x1e, 0xc4, 0x64, 0x43, 0xb6, 0xeb, 0xd4, 0xe9, 0x60, 0x22, 0xee, 0xcf, 0xb8, 0x52, 0x1b, 0xf0, 0x04, 0xce, 0xbc, 0x2b, 0xf0, 0xbe, 0xcd, 0x44, 0x74, 0x1e, 0x1f, 0x63, 0xf9, + /* (2^434)P */ 0xe1, 0x3f, 0x95, 0x94, 0xb2, 0xb6, 0x31, 0xa9, 0x1b, 0xdb, 0xfd, 0x0e, 0xdb, 0xdd, 0x1a, 0x22, 0x78, 0x60, 0x9f, 0x75, 0x5f, 0x93, 0x06, 0x0c, 0xd8, 0xbb, 0xa2, 0x85, 0x2b, 0x5e, 0xc0, 0x9b, 0xa8, 0x5d, 0xaf, 0x93, 0x91, 0x91, 0x47, 0x41, 0x1a, 0xfc, 0xb4, 0x51, 0x85, 0xad, 0x69, 0x4d, 0x73, 0x69, 0xd5, 0x4e, 0x82, 0xfb, 0x66, 0xcb, + /* (2^435)P */ 0x7c, 0xbe, 0xc7, 0x51, 0xc4, 0x74, 0x6e, 0xab, 0xfd, 0x41, 0x4f, 0x76, 0x4f, 0x24, 0x03, 0xd6, 0x2a, 0xb7, 0x42, 0xb4, 0xda, 0x41, 0x2c, 0x82, 0x48, 0x4c, 0x7f, 0x6f, 0x25, 0x5d, 0x36, 0xd4, 0x69, 0xf5, 0xef, 0x02, 0x81, 0xea, 0x6f, 0x19, 0x69, 0xe8, 0x6f, 0x5b, 0x2f, 0x14, 0x0e, 0x6f, 0x89, 0xb4, 0xb5, 0xd8, 0xae, 0xef, 0x7b, 0x87, + /* (2^436)P */ 0xe9, 0x91, 0xa0, 0x8b, 0xc9, 0xe0, 0x01, 0x90, 0x37, 0xc1, 0x6f, 0xdc, 0x5e, 0xf7, 0xbf, 0x43, 0x00, 0xaa, 0x10, 0x76, 0x76, 0x18, 0x6e, 0x19, 0x1e, 0x94, 0x50, 0x11, 0x0a, 0xd1, 0xe2, 0xdb, 0x08, 0x21, 0xa0, 0x1f, 0xdb, 0x54, 0xfe, 0xea, 0x6e, 0xa3, 0x68, 0x56, 0x87, 0x0b, 0x22, 0x4e, 0x66, 0xf3, 0x82, 0x82, 0x00, 0xcd, 0xd4, 0x12, + /* (2^437)P */ 0x25, 0x8e, 0x24, 0x77, 0x64, 0x4c, 0xe0, 0xf8, 0x18, 0xc0, 0xdc, 0xc7, 0x1b, 0x35, 0x65, 0xde, 0x67, 0x41, 0x5e, 0x6f, 0x90, 0x82, 0xa7, 0x2e, 0x6d, 0xf1, 0x47, 0xb4, 0x92, 0x9c, 0xfd, 0x6a, 0x9a, 0x41, 0x36, 0x20, 0x24, 0x58, 0xc3, 0x59, 0x07, 0x9a, 0xfa, 0x9f, 0x03, 0xcb, 0xc7, 0x69, 0x37, 0x60, 0xe1, 0xab, 0x13, 0x72, 0xee, 0xa2, + /* (2^438)P */ 0x74, 0x78, 0xfb, 0x13, 0xcb, 0x8e, 0x37, 0x1a, 0xf6, 0x1d, 0x17, 0x83, 0x06, 0xd4, 0x27, 0x06, 0x21, 0xe8, 0xda, 0xdf, 0x6b, 0xf3, 0x83, 0x6b, 0x34, 0x8a, 0x8c, 0xee, 0x01, 0x05, 0x5b, 0xed, 0xd3, 0x1b, 0xc9, 0x64, 0x83, 0xc9, 0x49, 0xc2, 0x57, 0x1b, 0xdd, 0xcf, 0xf1, 0x9d, 0x63, 0xee, 0x1c, 0x0d, 0xa0, 0x0a, 0x73, 0x1f, 0x5b, 0x32, + /* (2^439)P */ 0x29, 0xce, 0x1e, 0xc0, 0x6a, 0xf5, 0xeb, 0x99, 0x5a, 0x39, 0x23, 0xe9, 0xdd, 0xac, 0x44, 0x88, 0xbc, 0x80, 0x22, 0xde, 0x2c, 0xcb, 0xa8, 0x3b, 0xff, 0xf7, 0x6f, 0xc7, 0x71, 0x72, 0xa8, 0xa3, 0xf6, 0x4d, 0xc6, 0x75, 0xda, 0x80, 0xdc, 0xd9, 0x30, 0xd9, 0x07, 0x50, 0x5a, 0x54, 0x7d, 0xda, 0x39, 0x6f, 0x78, 0x94, 0xbf, 0x25, 0x98, 0xdc, + /* (2^440)P */ 0x01, 0x26, 0x62, 0x44, 0xfb, 0x0f, 0x11, 0x72, 0x73, 0x0a, 0x16, 0xc7, 0x16, 0x9c, 0x9b, 0x37, 0xd8, 0xff, 0x4f, 0xfe, 0x57, 0xdb, 0xae, 0xef, 0x7d, 0x94, 0x30, 0x04, 0x70, 0x83, 0xde, 0x3c, 0xd4, 0xb5, 0x70, 0xda, 0xa7, 0x55, 0xc8, 0x19, 0xe1, 0x36, 0x15, 0x61, 0xe7, 0x3b, 0x7d, 0x85, 0xbb, 0xf3, 0x42, 0x5a, 0x94, 0xf4, 0x53, 0x2a, + /* (2^441)P */ 0x14, 0x60, 0xa6, 0x0b, 0x83, 0xe1, 0x23, 0x77, 0xc0, 0xce, 0x50, 0xed, 0x35, 0x8d, 0x98, 0x99, 0x7d, 0xf5, 0x8d, 0xce, 0x94, 0x25, 0xc8, 0x0f, 0x6d, 0xfa, 0x4a, 0xa4, 0x3a, 0x1f, 0x66, 0xfb, 0x5a, 0x64, 0xaf, 0x8b, 0x54, 0x54, 0x44, 0x3f, 0x5b, 0x88, 0x61, 0xe4, 0x48, 0x45, 0x26, 0x20, 0xbe, 0x0d, 0x06, 0xbb, 0x65, 0x59, 0xe1, 0x36, + /* (2^442)P */ 0xb7, 0x98, 0xce, 0xa3, 0xe3, 0xee, 0x11, 0x1b, 0x9e, 0x24, 0x59, 0x75, 0x31, 0x37, 0x44, 0x6f, 0x6b, 0x9e, 0xec, 0xb7, 0x44, 0x01, 0x7e, 0xab, 0xbb, 0x69, 0x5d, 0x11, 0xb0, 0x30, 0x64, 0xea, 0x91, 0xb4, 0x7a, 0x8c, 0x02, 0x4c, 0xb9, 0x10, 0xa7, 0xc7, 0x79, 0xe6, 0xdc, 0x77, 0xe3, 0xc8, 0xef, 0x3e, 0xf9, 0x38, 0x81, 0xce, 0x9a, 0xb2, + /* (2^443)P */ 0x91, 0x12, 0x76, 0xd0, 0x10, 0xb4, 0xaf, 0xe1, 0x89, 0x3a, 0x93, 0x6b, 0x5c, 0x19, 0x5f, 0x24, 0xed, 0x04, 0x92, 0xc7, 0xf0, 0x00, 0x08, 0xc1, 0x92, 0xff, 0x90, 0xdb, 0xb2, 0xbf, 0xdf, 0x49, 0xcd, 0xbd, 0x5c, 0x6e, 0xbf, 0x16, 0xbb, 0x61, 0xf9, 0x20, 0x33, 0x35, 0x93, 0x11, 0xbc, 0x59, 0x69, 0xce, 0x18, 0x9f, 0xf8, 0x7b, 0xa1, 0x6e, + /* (2^444)P */ 0xa1, 0xf4, 0xaf, 0xad, 0xf8, 0xe6, 0x99, 0xd2, 0xa1, 0x4d, 0xde, 0x56, 0xc9, 0x7b, 0x0b, 0x11, 0x3e, 0xbf, 0x89, 0x1a, 0x9a, 0x90, 0xe5, 0xe2, 0xa6, 0x37, 0x88, 0xa1, 0x68, 0x59, 0xae, 0x8c, 0xec, 0x02, 0x14, 0x8d, 0xb7, 0x2e, 0x25, 0x75, 0x7f, 0x76, 0x1a, 0xd3, 0x4d, 0xad, 0x8a, 0x00, 0x6c, 0x96, 0x49, 0xa4, 0xc3, 0x2e, 0x5c, 0x7b, + /* (2^445)P */ 0x26, 0x53, 0xf7, 0xda, 0xa8, 0x01, 0x14, 0xb1, 0x63, 0xe3, 0xc3, 0x89, 0x88, 0xb0, 0x85, 0x40, 0x2b, 0x26, 0x9a, 0x10, 0x1a, 0x70, 0x33, 0xf4, 0x50, 0x9d, 0x4d, 0xd8, 0x64, 0xc6, 0x0f, 0xe1, 0x17, 0xc8, 0x10, 0x4b, 0xfc, 0xa0, 0xc9, 0xba, 0x2c, 0x98, 0x09, 0xf5, 0x84, 0xb6, 0x7c, 0x4e, 0xa3, 0xe3, 0x81, 0x1b, 0x32, 0x60, 0x02, 0xdd, + /* (2^446)P */ 0xa3, 0xe5, 0x86, 0xd4, 0x43, 0xa8, 0xd1, 0x98, 0x9d, 0x9d, 0xdb, 0x04, 0xcf, 0x6e, 0x35, 0x05, 0x30, 0x53, 0x3b, 0xbc, 0x90, 0x00, 0x4a, 0xc5, 0x40, 0x2a, 0x0f, 0xde, 0x1a, 0xd7, 0x36, 0x27, 0x44, 0x62, 0xa6, 0xac, 0x9d, 0xd2, 0x70, 0x69, 0x14, 0x39, 0x9b, 0xd1, 0xc3, 0x0a, 0x3a, 0x82, 0x0e, 0xf1, 0x94, 0xd7, 0x42, 0x94, 0xd5, 0x7d, + /* (2^447)P */ 0x04, 0xc0, 0x6e, 0x12, 0x90, 0x70, 0xf9, 0xdf, 0xf7, 0xc9, 0x86, 0xc0, 0xe6, 0x92, 0x8b, 0x0a, 0xa1, 0xc1, 0x3b, 0xcc, 0x33, 0xb7, 0xf0, 0xeb, 0x51, 0x50, 0x80, 0x20, 0x69, 0x1c, 0x4f, 0x89, 0x05, 0x1e, 0xe4, 0x7a, 0x0a, 0xc2, 0xf0, 0xf5, 0x78, 0x91, 0x76, 0x34, 0x45, 0xdc, 0x24, 0x53, 0x24, 0x98, 0xe2, 0x73, 0x6f, 0xe6, 0x46, 0x67, +} diff --git a/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/constants.go b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/constants.go new file mode 100644 index 0000000..b6b236e --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/constants.go @@ -0,0 +1,71 @@ +package goldilocks + +import fp "github.com/cloudflare/circl/math/fp448" + +var ( + // genX is the x-coordinate of the generator of Goldilocks curve. + genX = fp.Elt{ + 0x5e, 0xc0, 0x0c, 0xc7, 0x2b, 0xa8, 0x26, 0x26, + 0x8e, 0x93, 0x00, 0x8b, 0xe1, 0x80, 0x3b, 0x43, + 0x11, 0x65, 0xb6, 0x2a, 0xf7, 0x1a, 0xae, 0x12, + 0x64, 0xa4, 0xd3, 0xa3, 0x24, 0xe3, 0x6d, 0xea, + 0x67, 0x17, 0x0f, 0x47, 0x70, 0x65, 0x14, 0x9e, + 0xda, 0x36, 0xbf, 0x22, 0xa6, 0x15, 0x1d, 0x22, + 0xed, 0x0d, 0xed, 0x6b, 0xc6, 0x70, 0x19, 0x4f, + } + // genY is the y-coordinate of the generator of Goldilocks curve. + genY = fp.Elt{ + 0x14, 0xfa, 0x30, 0xf2, 0x5b, 0x79, 0x08, 0x98, + 0xad, 0xc8, 0xd7, 0x4e, 0x2c, 0x13, 0xbd, 0xfd, + 0xc4, 0x39, 0x7c, 0xe6, 0x1c, 0xff, 0xd3, 0x3a, + 0xd7, 0xc2, 0xa0, 0x05, 0x1e, 0x9c, 0x78, 0x87, + 0x40, 0x98, 0xa3, 0x6c, 0x73, 0x73, 0xea, 0x4b, + 0x62, 0xc7, 0xc9, 0x56, 0x37, 0x20, 0x76, 0x88, + 0x24, 0xbc, 0xb6, 0x6e, 0x71, 0x46, 0x3f, 0x69, + } + // paramD is -39081 in Fp. + paramD = fp.Elt{ + 0x56, 0x67, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + } + // order is 2^446-0x8335dc163bb124b65129c96fde933d8d723a70aadc873d6d54a7bb0d, + // which is the number of points in the prime subgroup. + order = Scalar{ + 0xf3, 0x44, 0x58, 0xab, 0x92, 0xc2, 0x78, 0x23, + 0x55, 0x8f, 0xc5, 0x8d, 0x72, 0xc2, 0x6c, 0x21, + 0x90, 0x36, 0xd6, 0xae, 0x49, 0xdb, 0x4e, 0xc4, + 0xe9, 0x23, 0xca, 0x7c, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, + } + // residue448 is 2^448 mod order. + residue448 = [4]uint64{ + 0x721cf5b5529eec34, 0x7a4cf635c8e9c2ab, 0xeec492d944a725bf, 0x20cd77058, + } + // invFour is 1/4 mod order. + invFour = Scalar{ + 0x3d, 0x11, 0xd6, 0xaa, 0xa4, 0x30, 0xde, 0x48, + 0xd5, 0x63, 0x71, 0xa3, 0x9c, 0x30, 0x5b, 0x08, + 0xa4, 0x8d, 0xb5, 0x6b, 0xd2, 0xb6, 0x13, 0x71, + 0xfa, 0x88, 0x32, 0xdf, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x0f, + } + // paramDTwist is -39082 in Fp. The D parameter of the twist curve. + paramDTwist = fp.Elt{ + 0x55, 0x67, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + } +) diff --git a/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/curve.go b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/curve.go new file mode 100644 index 0000000..1f16514 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/curve.go @@ -0,0 +1,84 @@ +// Package goldilocks provides elliptic curve operations over the goldilocks curve. +package goldilocks + +import fp "github.com/cloudflare/circl/math/fp448" + +// Curve is the Goldilocks curve x^2+y^2=z^2-39081x^2y^2. +type Curve struct{} + +// Identity returns the identity point. +func (Curve) Identity() *Point { + return &Point{ + y: fp.One(), + z: fp.One(), + } +} + +// IsOnCurve returns true if the point lies on the curve. +func (Curve) IsOnCurve(P *Point) bool { + x2, y2, t, t2, z2 := &fp.Elt{}, &fp.Elt{}, &fp.Elt{}, &fp.Elt{}, &fp.Elt{} + rhs, lhs := &fp.Elt{}, &fp.Elt{} + // Check z != 0 + eq0 := !fp.IsZero(&P.z) + + fp.Mul(t, &P.ta, &P.tb) // t = ta*tb + fp.Sqr(x2, &P.x) // x^2 + fp.Sqr(y2, &P.y) // y^2 + fp.Sqr(z2, &P.z) // z^2 + fp.Sqr(t2, t) // t^2 + fp.Add(lhs, x2, y2) // x^2 + y^2 + fp.Mul(rhs, t2, ¶mD) // dt^2 + fp.Add(rhs, rhs, z2) // z^2 + dt^2 + fp.Sub(lhs, lhs, rhs) // x^2 + y^2 - (z^2 + dt^2) + eq1 := fp.IsZero(lhs) + + fp.Mul(lhs, &P.x, &P.y) // xy + fp.Mul(rhs, t, &P.z) // tz + fp.Sub(lhs, lhs, rhs) // xy - tz + eq2 := fp.IsZero(lhs) + + return eq0 && eq1 && eq2 +} + +// Generator returns the generator point. +func (Curve) Generator() *Point { + return &Point{ + x: genX, + y: genY, + z: fp.One(), + ta: genX, + tb: genY, + } +} + +// Order returns the number of points in the prime subgroup. +func (Curve) Order() Scalar { return order } + +// Double returns 2P. +func (Curve) Double(P *Point) *Point { R := *P; R.Double(); return &R } + +// Add returns P+Q. +func (Curve) Add(P, Q *Point) *Point { R := *P; R.Add(Q); return &R } + +// ScalarMult returns kP. This function runs in constant time. +func (e Curve) ScalarMult(k *Scalar, P *Point) *Point { + k4 := &Scalar{} + k4.divBy4(k) + return e.pull(twistCurve{}.ScalarMult(k4, e.push(P))) +} + +// ScalarBaseMult returns kG where G is the generator point. This function runs in constant time. +func (e Curve) ScalarBaseMult(k *Scalar) *Point { + k4 := &Scalar{} + k4.divBy4(k) + return e.pull(twistCurve{}.ScalarBaseMult(k4)) +} + +// CombinedMult returns mG+nP, where G is the generator point. This function is non-constant time. +func (e Curve) CombinedMult(m, n *Scalar, P *Point) *Point { + m4 := &Scalar{} + n4 := &Scalar{} + m4.divBy4(m) + n4.divBy4(n) + return e.pull(twistCurve{}.CombinedMult(m4, n4, twistCurve{}.pull(P))) +} diff --git a/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/isogeny.go b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/isogeny.go new file mode 100644 index 0000000..b1daab8 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/isogeny.go @@ -0,0 +1,52 @@ +package goldilocks + +import fp "github.com/cloudflare/circl/math/fp448" + +func (Curve) pull(P *twistPoint) *Point { return twistCurve{}.push(P) } +func (twistCurve) pull(P *Point) *twistPoint { return Curve{}.push(P) } + +// push sends a point on the Goldilocks curve to a point on the twist curve. +func (Curve) push(P *Point) *twistPoint { + Q := &twistPoint{} + Px, Py, Pz := &P.x, &P.y, &P.z + a, b, c, d, e, f, g, h := &Q.x, &Q.y, &Q.z, &fp.Elt{}, &Q.ta, &Q.x, &Q.y, &Q.tb + fp.Add(e, Px, Py) // x+y + fp.Sqr(a, Px) // A = x^2 + fp.Sqr(b, Py) // B = y^2 + fp.Sqr(c, Pz) // z^2 + fp.Add(c, c, c) // C = 2*z^2 + *d = *a // D = A + fp.Sqr(e, e) // (x+y)^2 + fp.Sub(e, e, a) // (x+y)^2-A + fp.Sub(e, e, b) // E = (x+y)^2-A-B + fp.Add(h, b, d) // H = B+D + fp.Sub(g, b, d) // G = B-D + fp.Sub(f, c, h) // F = C-H + fp.Mul(&Q.z, f, g) // Z = F * G + fp.Mul(&Q.x, e, f) // X = E * F + fp.Mul(&Q.y, g, h) // Y = G * H, // T = E * H + return Q +} + +// push sends a point on the twist curve to a point on the Goldilocks curve. +func (twistCurve) push(P *twistPoint) *Point { + Q := &Point{} + Px, Py, Pz := &P.x, &P.y, &P.z + a, b, c, d, e, f, g, h := &Q.x, &Q.y, &Q.z, &fp.Elt{}, &Q.ta, &Q.x, &Q.y, &Q.tb + fp.Add(e, Px, Py) // x+y + fp.Sqr(a, Px) // A = x^2 + fp.Sqr(b, Py) // B = y^2 + fp.Sqr(c, Pz) // z^2 + fp.Add(c, c, c) // C = 2*z^2 + fp.Neg(d, a) // D = -A + fp.Sqr(e, e) // (x+y)^2 + fp.Sub(e, e, a) // (x+y)^2-A + fp.Sub(e, e, b) // E = (x+y)^2-A-B + fp.Add(h, b, d) // H = B+D + fp.Sub(g, b, d) // G = B-D + fp.Sub(f, c, h) // F = C-H + fp.Mul(&Q.z, f, g) // Z = F * G + fp.Mul(&Q.x, e, f) // X = E * F + fp.Mul(&Q.y, g, h) // Y = G * H, // T = E * H + return Q +} diff --git a/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/point.go b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/point.go new file mode 100644 index 0000000..11f73de --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/point.go @@ -0,0 +1,171 @@ +package goldilocks + +import ( + "errors" + "fmt" + + fp "github.com/cloudflare/circl/math/fp448" +) + +// Point is a point on the Goldilocks Curve. +type Point struct{ x, y, z, ta, tb fp.Elt } + +func (P Point) String() string { + return fmt.Sprintf("x: %v\ny: %v\nz: %v\nta: %v\ntb: %v", P.x, P.y, P.z, P.ta, P.tb) +} + +// FromAffine creates a point from affine coordinates. +func FromAffine(x, y *fp.Elt) (*Point, error) { + P := &Point{ + x: *x, + y: *y, + z: fp.One(), + ta: *x, + tb: *y, + } + if !(Curve{}).IsOnCurve(P) { + return P, errors.New("point not on curve") + } + return P, nil +} + +// isLessThan returns true if 0 <= x < y, and assumes that slices are of the +// same length and are interpreted in little-endian order. +func isLessThan(x, y []byte) bool { + i := len(x) - 1 + for i > 0 && x[i] == y[i] { + i-- + } + return x[i] < y[i] +} + +// FromBytes returns a point from the input buffer. +func FromBytes(in []byte) (*Point, error) { + if len(in) < fp.Size+1 { + return nil, errors.New("wrong input length") + } + err := errors.New("invalid decoding") + P := &Point{} + signX := in[fp.Size] >> 7 + copy(P.y[:], in[:fp.Size]) + p := fp.P() + if !isLessThan(P.y[:], p[:]) { + return nil, err + } + + u, v := &fp.Elt{}, &fp.Elt{} + one := fp.One() + fp.Sqr(u, &P.y) // u = y^2 + fp.Mul(v, u, ¶mD) // v = dy^2 + fp.Sub(u, u, &one) // u = y^2-1 + fp.Sub(v, v, &one) // v = dy^2-1 + isQR := fp.InvSqrt(&P.x, u, v) // x = sqrt(u/v) + if !isQR { + return nil, err + } + fp.Modp(&P.x) // x = x mod p + if fp.IsZero(&P.x) && signX == 1 { + return nil, err + } + if signX != (P.x[0] & 1) { + fp.Neg(&P.x, &P.x) + } + P.ta = P.x + P.tb = P.y + P.z = fp.One() + return P, nil +} + +// IsIdentity returns true is P is the identity Point. +func (P *Point) IsIdentity() bool { + return fp.IsZero(&P.x) && !fp.IsZero(&P.y) && !fp.IsZero(&P.z) && P.y == P.z +} + +// IsEqual returns true if P is equivalent to Q. +func (P *Point) IsEqual(Q *Point) bool { + l, r := &fp.Elt{}, &fp.Elt{} + fp.Mul(l, &P.x, &Q.z) + fp.Mul(r, &Q.x, &P.z) + fp.Sub(l, l, r) + b := fp.IsZero(l) + fp.Mul(l, &P.y, &Q.z) + fp.Mul(r, &Q.y, &P.z) + fp.Sub(l, l, r) + b = b && fp.IsZero(l) + fp.Mul(l, &P.ta, &P.tb) + fp.Mul(l, l, &Q.z) + fp.Mul(r, &Q.ta, &Q.tb) + fp.Mul(r, r, &P.z) + fp.Sub(l, l, r) + b = b && fp.IsZero(l) + return b +} + +// Neg obtains the inverse of the Point. +func (P *Point) Neg() { fp.Neg(&P.x, &P.x); fp.Neg(&P.ta, &P.ta) } + +// ToAffine returns the x,y affine coordinates of P. +func (P *Point) ToAffine() (x, y fp.Elt) { + fp.Inv(&P.z, &P.z) // 1/z + fp.Mul(&P.x, &P.x, &P.z) // x/z + fp.Mul(&P.y, &P.y, &P.z) // y/z + fp.Modp(&P.x) + fp.Modp(&P.y) + fp.SetOne(&P.z) + P.ta = P.x + P.tb = P.y + return P.x, P.y +} + +// ToBytes stores P into a slice of bytes. +func (P *Point) ToBytes(out []byte) error { + if len(out) < fp.Size+1 { + return errors.New("invalid decoding") + } + x, y := P.ToAffine() + out[fp.Size] = (x[0] & 1) << 7 + return fp.ToBytes(out[:fp.Size], &y) +} + +// MarshalBinary encodes the receiver into a binary form and returns the result. +func (P *Point) MarshalBinary() (data []byte, err error) { + data = make([]byte, fp.Size+1) + err = P.ToBytes(data[:fp.Size+1]) + return data, err +} + +// UnmarshalBinary must be able to decode the form generated by MarshalBinary. +func (P *Point) UnmarshalBinary(data []byte) error { Q, err := FromBytes(data); *P = *Q; return err } + +// Double sets P = 2Q. +func (P *Point) Double() { P.Add(P) } + +// Add sets P =P+Q.. +func (P *Point) Add(Q *Point) { + // This is formula (5) from "Twisted Edwards Curves Revisited" by + // Hisil H., Wong K.KH., Carter G., Dawson E. (2008) + // https://doi.org/10.1007/978-3-540-89255-7_20 + x1, y1, z1, ta1, tb1 := &P.x, &P.y, &P.z, &P.ta, &P.tb + x2, y2, z2, ta2, tb2 := &Q.x, &Q.y, &Q.z, &Q.ta, &Q.tb + x3, y3, z3, E, H := &P.x, &P.y, &P.z, &P.ta, &P.tb + A, B, C, D := &fp.Elt{}, &fp.Elt{}, &fp.Elt{}, &fp.Elt{} + t1, t2, F, G := C, D, &fp.Elt{}, &fp.Elt{} + fp.Mul(t1, ta1, tb1) // t1 = ta1*tb1 + fp.Mul(t2, ta2, tb2) // t2 = ta2*tb2 + fp.Mul(A, x1, x2) // A = x1*x2 + fp.Mul(B, y1, y2) // B = y1*y2 + fp.Mul(C, t1, t2) // t1*t2 + fp.Mul(C, C, ¶mD) // C = d*t1*t2 + fp.Mul(D, z1, z2) // D = z1*z2 + fp.Add(F, x1, y1) // x1+y1 + fp.Add(E, x2, y2) // x2+y2 + fp.Mul(E, E, F) // (x1+y1)*(x2+y2) + fp.Sub(E, E, A) // (x1+y1)*(x2+y2)-A + fp.Sub(E, E, B) // E = (x1+y1)*(x2+y2)-A-B + fp.Sub(F, D, C) // F = D-C + fp.Add(G, D, C) // G = D+C + fp.Sub(H, B, A) // H = B-A + fp.Mul(z3, F, G) // Z = F * G + fp.Mul(x3, E, F) // X = E * F + fp.Mul(y3, G, H) // Y = G * H, T = E * H +} diff --git a/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/scalar.go b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/scalar.go new file mode 100644 index 0000000..f98117b --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/scalar.go @@ -0,0 +1,203 @@ +package goldilocks + +import ( + "encoding/binary" + "math/bits" +) + +// ScalarSize is the size (in bytes) of scalars. +const ScalarSize = 56 // 448 / 8 + +// _N is the number of 64-bit words to store scalars. +const _N = 7 // 448 / 64 + +// Scalar represents a positive integer stored in little-endian order. +type Scalar [ScalarSize]byte + +type scalar64 [_N]uint64 + +func (z *scalar64) fromScalar(x *Scalar) { + z[0] = binary.LittleEndian.Uint64(x[0*8 : 1*8]) + z[1] = binary.LittleEndian.Uint64(x[1*8 : 2*8]) + z[2] = binary.LittleEndian.Uint64(x[2*8 : 3*8]) + z[3] = binary.LittleEndian.Uint64(x[3*8 : 4*8]) + z[4] = binary.LittleEndian.Uint64(x[4*8 : 5*8]) + z[5] = binary.LittleEndian.Uint64(x[5*8 : 6*8]) + z[6] = binary.LittleEndian.Uint64(x[6*8 : 7*8]) +} + +func (z *scalar64) toScalar(x *Scalar) { + binary.LittleEndian.PutUint64(x[0*8:1*8], z[0]) + binary.LittleEndian.PutUint64(x[1*8:2*8], z[1]) + binary.LittleEndian.PutUint64(x[2*8:3*8], z[2]) + binary.LittleEndian.PutUint64(x[3*8:4*8], z[3]) + binary.LittleEndian.PutUint64(x[4*8:5*8], z[4]) + binary.LittleEndian.PutUint64(x[5*8:6*8], z[5]) + binary.LittleEndian.PutUint64(x[6*8:7*8], z[6]) +} + +// add calculates z = x + y. Assumes len(z) > max(len(x),len(y)). +func add(z, x, y []uint64) uint64 { + l, L, zz := len(x), len(y), y + if l > L { + l, L, zz = L, l, x + } + c := uint64(0) + for i := 0; i < l; i++ { + z[i], c = bits.Add64(x[i], y[i], c) + } + for i := l; i < L; i++ { + z[i], c = bits.Add64(zz[i], 0, c) + } + return c +} + +// sub calculates z = x - y. Assumes len(z) > max(len(x),len(y)). +func sub(z, x, y []uint64) uint64 { + l, L, zz := len(x), len(y), y + if l > L { + l, L, zz = L, l, x + } + c := uint64(0) + for i := 0; i < l; i++ { + z[i], c = bits.Sub64(x[i], y[i], c) + } + for i := l; i < L; i++ { + z[i], c = bits.Sub64(zz[i], 0, c) + } + return c +} + +// mulWord calculates z = x * y. Assumes len(z) >= len(x)+1. +func mulWord(z, x []uint64, y uint64) { + for i := range z { + z[i] = 0 + } + carry := uint64(0) + for i := range x { + hi, lo := bits.Mul64(x[i], y) + lo, cc := bits.Add64(lo, z[i], 0) + hi, _ = bits.Add64(hi, 0, cc) + z[i], cc = bits.Add64(lo, carry, 0) + carry, _ = bits.Add64(hi, 0, cc) + } + z[len(x)] = carry +} + +// Cmov moves x into z if b=1. +func (z *scalar64) Cmov(b uint64, x *scalar64) { + m := uint64(0) - b + for i := range z { + z[i] = (z[i] &^ m) | (x[i] & m) + } +} + +// leftShift shifts to the left the words of z returning the more significant word. +func (z *scalar64) leftShift(low uint64) uint64 { + high := z[_N-1] + for i := _N - 1; i > 0; i-- { + z[i] = z[i-1] + } + z[0] = low + return high +} + +// reduceOneWord calculates z = z + 2^448*x such that the result fits in a Scalar. +func (z *scalar64) reduceOneWord(x uint64) { + prod := (&scalar64{})[:] + mulWord(prod, residue448[:], x) + cc := add(z[:], z[:], prod) + mulWord(prod, residue448[:], cc) + add(z[:], z[:], prod) +} + +// modOrder reduces z mod order. +func (z *scalar64) modOrder() { + var o64, x scalar64 + o64.fromScalar(&order) + // Performs: while (z >= order) { z = z-order } + // At most 8 (eight) iterations reduce 3 bits by subtracting. + for i := 0; i < 8; i++ { + c := sub(x[:], z[:], o64[:]) // (c || x) = z-order + z.Cmov(1-c, &x) // if c != 0 { z = x } + } +} + +// FromBytes stores z = x mod order, where x is a number stored in little-endian order. +func (z *Scalar) FromBytes(x []byte) { + n := len(x) + nCeil := (n + 7) >> 3 + for i := range z { + z[i] = 0 + } + if nCeil < _N { + copy(z[:], x) + return + } + copy(z[:], x[8*(nCeil-_N):]) + var z64 scalar64 + z64.fromScalar(z) + for i := nCeil - _N - 1; i >= 0; i-- { + low := binary.LittleEndian.Uint64(x[8*i:]) + high := z64.leftShift(low) + z64.reduceOneWord(high) + } + z64.modOrder() + z64.toScalar(z) +} + +// divBy4 calculates z = x/4 mod order. +func (z *Scalar) divBy4(x *Scalar) { z.Mul(x, &invFour) } + +// Red reduces z mod order. +func (z *Scalar) Red() { var t scalar64; t.fromScalar(z); t.modOrder(); t.toScalar(z) } + +// Neg calculates z = -z mod order. +func (z *Scalar) Neg() { z.Sub(&order, z) } + +// Add calculates z = x+y mod order. +func (z *Scalar) Add(x, y *Scalar) { + var z64, x64, y64, t scalar64 + x64.fromScalar(x) + y64.fromScalar(y) + c := add(z64[:], x64[:], y64[:]) + add(t[:], z64[:], residue448[:]) + z64.Cmov(c, &t) + z64.modOrder() + z64.toScalar(z) +} + +// Sub calculates z = x-y mod order. +func (z *Scalar) Sub(x, y *Scalar) { + var z64, x64, y64, t scalar64 + x64.fromScalar(x) + y64.fromScalar(y) + c := sub(z64[:], x64[:], y64[:]) + sub(t[:], z64[:], residue448[:]) + z64.Cmov(c, &t) + z64.modOrder() + z64.toScalar(z) +} + +// Mul calculates z = x*y mod order. +func (z *Scalar) Mul(x, y *Scalar) { + var z64, x64, y64 scalar64 + prod := (&[_N + 1]uint64{})[:] + x64.fromScalar(x) + y64.fromScalar(y) + mulWord(prod, x64[:], y64[_N-1]) + copy(z64[:], prod[:_N]) + z64.reduceOneWord(prod[_N]) + for i := _N - 2; i >= 0; i-- { + h := z64.leftShift(0) + z64.reduceOneWord(h) + mulWord(prod, x64[:], y64[i]) + c := add(z64[:], z64[:], prod[:_N]) + z64.reduceOneWord(prod[_N] + c) + } + z64.modOrder() + z64.toScalar(z) +} + +// IsZero returns true if z=0. +func (z *Scalar) IsZero() bool { z.Red(); return *z == Scalar{} } diff --git a/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/twist.go b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/twist.go new file mode 100644 index 0000000..83d7cda --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/twist.go @@ -0,0 +1,138 @@ +package goldilocks + +import ( + "crypto/subtle" + "math/bits" + + "github.com/cloudflare/circl/internal/conv" + "github.com/cloudflare/circl/math" + fp "github.com/cloudflare/circl/math/fp448" +) + +// twistCurve is -x^2+y^2=1-39082x^2y^2 and is 4-isogenous to Goldilocks. +type twistCurve struct{} + +// Identity returns the identity point. +func (twistCurve) Identity() *twistPoint { + return &twistPoint{ + y: fp.One(), + z: fp.One(), + } +} + +// subYDiv16 update x = (x - y) / 16. +func subYDiv16(x *scalar64, y int64) { + s := uint64(y >> 63) + x0, b0 := bits.Sub64((*x)[0], uint64(y), 0) + x1, b1 := bits.Sub64((*x)[1], s, b0) + x2, b2 := bits.Sub64((*x)[2], s, b1) + x3, b3 := bits.Sub64((*x)[3], s, b2) + x4, b4 := bits.Sub64((*x)[4], s, b3) + x5, b5 := bits.Sub64((*x)[5], s, b4) + x6, _ := bits.Sub64((*x)[6], s, b5) + x[0] = (x0 >> 4) | (x1 << 60) + x[1] = (x1 >> 4) | (x2 << 60) + x[2] = (x2 >> 4) | (x3 << 60) + x[3] = (x3 >> 4) | (x4 << 60) + x[4] = (x4 >> 4) | (x5 << 60) + x[5] = (x5 >> 4) | (x6 << 60) + x[6] = (x6 >> 4) +} + +func recodeScalar(d *[113]int8, k *Scalar) { + var k64 scalar64 + k64.fromScalar(k) + for i := 0; i < 112; i++ { + d[i] = int8((k64[0] & 0x1f) - 16) + subYDiv16(&k64, int64(d[i])) + } + d[112] = int8(k64[0]) +} + +// ScalarMult returns kP. +func (e twistCurve) ScalarMult(k *Scalar, P *twistPoint) *twistPoint { + var TabP [8]preTwistPointProy + var S preTwistPointProy + var d [113]int8 + + var isZero int + if k.IsZero() { + isZero = 1 + } + subtle.ConstantTimeCopy(isZero, k[:], order[:]) + + minusK := *k + isEven := 1 - int(k[0]&0x1) + minusK.Neg() + subtle.ConstantTimeCopy(isEven, k[:], minusK[:]) + recodeScalar(&d, k) + + P.oddMultiples(TabP[:]) + Q := e.Identity() + for i := 112; i >= 0; i-- { + Q.Double() + Q.Double() + Q.Double() + Q.Double() + mask := d[i] >> 7 + absDi := (d[i] + mask) ^ mask + inx := int32((absDi - 1) >> 1) + sig := int((d[i] >> 7) & 0x1) + for j := range TabP { + S.cmov(&TabP[j], uint(subtle.ConstantTimeEq(inx, int32(j)))) + } + S.cneg(sig) + Q.mixAdd(&S) + } + Q.cneg(uint(isEven)) + return Q +} + +const ( + omegaFix = 7 + omegaVar = 5 +) + +// CombinedMult returns mG+nP. +func (e twistCurve) CombinedMult(m, n *Scalar, P *twistPoint) *twistPoint { + nafFix := math.OmegaNAF(conv.BytesLe2BigInt(m[:]), omegaFix) + nafVar := math.OmegaNAF(conv.BytesLe2BigInt(n[:]), omegaVar) + + if len(nafFix) > len(nafVar) { + nafVar = append(nafVar, make([]int32, len(nafFix)-len(nafVar))...) + } else if len(nafFix) < len(nafVar) { + nafFix = append(nafFix, make([]int32, len(nafVar)-len(nafFix))...) + } + + var TabQ [1 << (omegaVar - 2)]preTwistPointProy + P.oddMultiples(TabQ[:]) + Q := e.Identity() + for i := len(nafFix) - 1; i >= 0; i-- { + Q.Double() + // Generator point + if nafFix[i] != 0 { + idxM := absolute(nafFix[i]) >> 1 + R := tabVerif[idxM] + if nafFix[i] < 0 { + R.neg() + } + Q.mixAddZ1(&R) + } + // Variable input point + if nafVar[i] != 0 { + idxN := absolute(nafVar[i]) >> 1 + S := TabQ[idxN] + if nafVar[i] < 0 { + S.neg() + } + Q.mixAdd(&S) + } + } + return Q +} + +// absolute returns always a positive value. +func absolute(x int32) int32 { + mask := x >> 31 + return (x + mask) ^ mask +} diff --git a/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/twistPoint.go b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/twistPoint.go new file mode 100644 index 0000000..c55db77 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/twistPoint.go @@ -0,0 +1,135 @@ +package goldilocks + +import ( + "fmt" + + fp "github.com/cloudflare/circl/math/fp448" +) + +type twistPoint struct{ x, y, z, ta, tb fp.Elt } + +type preTwistPointAffine struct{ addYX, subYX, dt2 fp.Elt } + +type preTwistPointProy struct { + preTwistPointAffine + z2 fp.Elt +} + +func (P *twistPoint) String() string { + return fmt.Sprintf("x: %v\ny: %v\nz: %v\nta: %v\ntb: %v", P.x, P.y, P.z, P.ta, P.tb) +} + +// cneg conditionally negates the point if b=1. +func (P *twistPoint) cneg(b uint) { + t := &fp.Elt{} + fp.Neg(t, &P.x) + fp.Cmov(&P.x, t, b) + fp.Neg(t, &P.ta) + fp.Cmov(&P.ta, t, b) +} + +// Double updates P with 2P. +func (P *twistPoint) Double() { + // This is formula (7) from "Twisted Edwards Curves Revisited" by + // Hisil H., Wong K.KH., Carter G., Dawson E. (2008) + // https://doi.org/10.1007/978-3-540-89255-7_20 + Px, Py, Pz, Pta, Ptb := &P.x, &P.y, &P.z, &P.ta, &P.tb + a, b, c, e, f, g, h := Px, Py, Pz, Pta, Px, Py, Ptb + fp.Add(e, Px, Py) // x+y + fp.Sqr(a, Px) // A = x^2 + fp.Sqr(b, Py) // B = y^2 + fp.Sqr(c, Pz) // z^2 + fp.Add(c, c, c) // C = 2*z^2 + fp.Add(h, a, b) // H = A+B + fp.Sqr(e, e) // (x+y)^2 + fp.Sub(e, e, h) // E = (x+y)^2-A-B + fp.Sub(g, b, a) // G = B-A + fp.Sub(f, c, g) // F = C-G + fp.Mul(Pz, f, g) // Z = F * G + fp.Mul(Px, e, f) // X = E * F + fp.Mul(Py, g, h) // Y = G * H, T = E * H +} + +// mixAdd calculates P= P+Q, where Q is a precomputed point with Z_Q = 1. +func (P *twistPoint) mixAddZ1(Q *preTwistPointAffine) { + fp.Add(&P.z, &P.z, &P.z) // D = 2*z1 (z2=1) + P.coreAddition(Q) +} + +// coreAddition calculates P=P+Q for curves with A=-1. +func (P *twistPoint) coreAddition(Q *preTwistPointAffine) { + // This is the formula following (5) from "Twisted Edwards Curves Revisited" by + // Hisil H., Wong K.KH., Carter G., Dawson E. (2008) + // https://doi.org/10.1007/978-3-540-89255-7_20 + Px, Py, Pz, Pta, Ptb := &P.x, &P.y, &P.z, &P.ta, &P.tb + addYX2, subYX2, dt2 := &Q.addYX, &Q.subYX, &Q.dt2 + a, b, c, d, e, f, g, h := Px, Py, &fp.Elt{}, Pz, Pta, Px, Py, Ptb + fp.Mul(c, Pta, Ptb) // t1 = ta*tb + fp.Sub(h, Py, Px) // y1-x1 + fp.Add(b, Py, Px) // y1+x1 + fp.Mul(a, h, subYX2) // A = (y1-x1)*(y2-x2) + fp.Mul(b, b, addYX2) // B = (y1+x1)*(y2+x2) + fp.Mul(c, c, dt2) // C = 2*D*t1*t2 + fp.Sub(e, b, a) // E = B-A + fp.Add(h, b, a) // H = B+A + fp.Sub(f, d, c) // F = D-C + fp.Add(g, d, c) // G = D+C + fp.Mul(Pz, f, g) // Z = F * G + fp.Mul(Px, e, f) // X = E * F + fp.Mul(Py, g, h) // Y = G * H, T = E * H +} + +func (P *preTwistPointAffine) neg() { + P.addYX, P.subYX = P.subYX, P.addYX + fp.Neg(&P.dt2, &P.dt2) +} + +func (P *preTwistPointAffine) cneg(b int) { + t := &fp.Elt{} + fp.Cswap(&P.addYX, &P.subYX, uint(b)) + fp.Neg(t, &P.dt2) + fp.Cmov(&P.dt2, t, uint(b)) +} + +func (P *preTwistPointAffine) cmov(Q *preTwistPointAffine, b uint) { + fp.Cmov(&P.addYX, &Q.addYX, b) + fp.Cmov(&P.subYX, &Q.subYX, b) + fp.Cmov(&P.dt2, &Q.dt2, b) +} + +// mixAdd calculates P= P+Q, where Q is a precomputed point with Z_Q != 1. +func (P *twistPoint) mixAdd(Q *preTwistPointProy) { + fp.Mul(&P.z, &P.z, &Q.z2) // D = 2*z1*z2 + P.coreAddition(&Q.preTwistPointAffine) +} + +// oddMultiples calculates T[i] = (2*i-1)P for 0 < i < len(T). +func (P *twistPoint) oddMultiples(T []preTwistPointProy) { + if n := len(T); n > 0 { + T[0].FromTwistPoint(P) + _2P := *P + _2P.Double() + R := &preTwistPointProy{} + R.FromTwistPoint(&_2P) + for i := 1; i < n; i++ { + P.mixAdd(R) + T[i].FromTwistPoint(P) + } + } +} + +// cmov conditionally moves Q into P if b=1. +func (P *preTwistPointProy) cmov(Q *preTwistPointProy, b uint) { + P.preTwistPointAffine.cmov(&Q.preTwistPointAffine, b) + fp.Cmov(&P.z2, &Q.z2, b) +} + +// FromTwistPoint precomputes some coordinates of Q for missed addition. +func (P *preTwistPointProy) FromTwistPoint(Q *twistPoint) { + fp.Add(&P.addYX, &Q.y, &Q.x) // addYX = X + Y + fp.Sub(&P.subYX, &Q.y, &Q.x) // subYX = Y - X + fp.Mul(&P.dt2, &Q.ta, &Q.tb) // T = ta*tb + fp.Mul(&P.dt2, &P.dt2, ¶mDTwist) // D*T + fp.Add(&P.dt2, &P.dt2, &P.dt2) // dt2 = 2*D*T + fp.Add(&P.z2, &Q.z, &Q.z) // z2 = 2*Z +} diff --git a/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/twistTables.go b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/twistTables.go new file mode 100644 index 0000000..ed432e0 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/twistTables.go @@ -0,0 +1,216 @@ +package goldilocks + +import fp "github.com/cloudflare/circl/math/fp448" + +var tabFixMult = [fxV][fx2w1]preTwistPointAffine{ + { + { + addYX: fp.Elt{0x65, 0x4a, 0xdd, 0xdf, 0xb4, 0x79, 0x60, 0xc8, 0xa1, 0x70, 0xb4, 0x3a, 0x1e, 0x0c, 0x9b, 0x19, 0xe5, 0x48, 0x3f, 0xd7, 0x44, 0x18, 0x18, 0x14, 0x14, 0x27, 0x45, 0xd0, 0x2b, 0x24, 0xd5, 0x93, 0xc3, 0x74, 0x4c, 0x50, 0x70, 0x43, 0x26, 0x05, 0x08, 0x24, 0xca, 0x78, 0x30, 0xc1, 0x06, 0x8d, 0xd4, 0x86, 0x42, 0xf0, 0x14, 0xde, 0x08, 0x05}, + subYX: fp.Elt{0x64, 0x4a, 0xdd, 0xdf, 0xb4, 0x79, 0x60, 0xc8, 0xa1, 0x70, 0xb4, 0x3a, 0x1e, 0x0c, 0x9b, 0x19, 0xe5, 0x48, 0x3f, 0xd7, 0x44, 0x18, 0x18, 0x14, 0x14, 0x27, 0x45, 0xd0, 0x2d, 0x24, 0xd5, 0x93, 0xc3, 0x74, 0x4c, 0x50, 0x70, 0x43, 0x26, 0x05, 0x08, 0x24, 0xca, 0x78, 0x30, 0xc1, 0x06, 0x8d, 0xd4, 0x86, 0x42, 0xf0, 0x14, 0xde, 0x08, 0x05}, + dt2: fp.Elt{0x1a, 0x33, 0xea, 0x64, 0x45, 0x1c, 0xdf, 0x17, 0x1d, 0x16, 0x34, 0x28, 0xd6, 0x61, 0x19, 0x67, 0x79, 0xb4, 0x13, 0xcf, 0x3e, 0x7c, 0x0e, 0x72, 0xda, 0xf1, 0x5f, 0xda, 0xe6, 0xcf, 0x42, 0xd3, 0xb6, 0x17, 0xc2, 0x68, 0x13, 0x2d, 0xd9, 0x60, 0x3e, 0xae, 0xf0, 0x5b, 0x96, 0xf0, 0xcd, 0xaf, 0xea, 0xb7, 0x0d, 0x59, 0x16, 0xa7, 0xff, 0x55}, + }, + { + addYX: fp.Elt{0xca, 0xd8, 0x7d, 0x86, 0x1a, 0xef, 0xad, 0x11, 0xe3, 0x27, 0x41, 0x7e, 0x7f, 0x3e, 0xa9, 0xd2, 0xb5, 0x4e, 0x50, 0xe0, 0x77, 0x91, 0xc2, 0x13, 0x52, 0x73, 0x41, 0x09, 0xa6, 0x57, 0x9a, 0xc8, 0xa8, 0x90, 0x9d, 0x26, 0x14, 0xbb, 0xa1, 0x2a, 0xf7, 0x45, 0x43, 0x4e, 0xea, 0x35, 0x62, 0xe1, 0x08, 0x85, 0x46, 0xb8, 0x24, 0x05, 0x2d, 0xab}, + subYX: fp.Elt{0x9b, 0xe6, 0xd3, 0xe5, 0xfe, 0x50, 0x36, 0x3c, 0x3c, 0x6d, 0x74, 0x1d, 0x74, 0xc0, 0xde, 0x5b, 0x45, 0x27, 0xe5, 0x12, 0xee, 0x63, 0x35, 0x6b, 0x13, 0xe2, 0x41, 0x6b, 0x3a, 0x05, 0x2b, 0xb1, 0x89, 0x26, 0xb6, 0xc6, 0xd1, 0x84, 0xff, 0x0e, 0x9b, 0xa3, 0xfb, 0x21, 0x36, 0x6b, 0x01, 0xf7, 0x9f, 0x7c, 0xeb, 0xf5, 0x18, 0x7a, 0x2a, 0x70}, + dt2: fp.Elt{0x09, 0xad, 0x99, 0x1a, 0x38, 0xd3, 0xdf, 0x22, 0x37, 0x32, 0x61, 0x8b, 0xf3, 0x19, 0x48, 0x08, 0xe8, 0x49, 0xb6, 0x4a, 0xa7, 0xed, 0xa4, 0xa2, 0xee, 0x86, 0xd7, 0x31, 0x5e, 0xce, 0x95, 0x76, 0x86, 0x42, 0x1c, 0x9d, 0x07, 0x14, 0x8c, 0x34, 0x18, 0x9c, 0x6d, 0x3a, 0xdf, 0xa9, 0xe8, 0x36, 0x7e, 0xe4, 0x95, 0xbe, 0xb5, 0x09, 0xf8, 0x9c}, + }, + { + addYX: fp.Elt{0x51, 0xdb, 0x49, 0xa8, 0x9f, 0xe3, 0xd7, 0xec, 0x0d, 0x0f, 0x49, 0xe8, 0xb6, 0xc5, 0x0f, 0x5a, 0x1c, 0xce, 0x54, 0x0d, 0xb1, 0x8d, 0x5b, 0xbf, 0xf4, 0xaa, 0x34, 0x77, 0xc4, 0x5d, 0x59, 0xb6, 0xc5, 0x0e, 0x5a, 0xd8, 0x5b, 0x30, 0xc2, 0x1d, 0xec, 0x85, 0x1c, 0x42, 0xbe, 0x24, 0x2e, 0x50, 0x55, 0x44, 0xb2, 0x3a, 0x01, 0xaa, 0x98, 0xfb}, + subYX: fp.Elt{0xe7, 0x29, 0xb7, 0xd0, 0xaa, 0x4f, 0x32, 0x53, 0x56, 0xde, 0xbc, 0xd1, 0x92, 0x5d, 0x19, 0xbe, 0xa3, 0xe3, 0x75, 0x48, 0xe0, 0x7a, 0x1b, 0x54, 0x7a, 0xb7, 0x41, 0x77, 0x84, 0x38, 0xdd, 0x14, 0x9f, 0xca, 0x3f, 0xa3, 0xc8, 0xa7, 0x04, 0x70, 0xf1, 0x4d, 0x3d, 0xb3, 0x84, 0x79, 0xcb, 0xdb, 0xe4, 0xc5, 0x42, 0x9b, 0x57, 0x19, 0xf1, 0x2d}, + dt2: fp.Elt{0x20, 0xb4, 0x94, 0x9e, 0xdf, 0x31, 0x44, 0x0b, 0xc9, 0x7b, 0x75, 0x40, 0x9d, 0xd1, 0x96, 0x39, 0x70, 0x71, 0x15, 0xc8, 0x93, 0xd5, 0xc5, 0xe5, 0xba, 0xfe, 0xee, 0x08, 0x6a, 0x98, 0x0a, 0x1b, 0xb2, 0xaa, 0x3a, 0xf4, 0xa4, 0x79, 0xf9, 0x8e, 0x4d, 0x65, 0x10, 0x9b, 0x3a, 0x6e, 0x7c, 0x87, 0x94, 0x92, 0x11, 0x65, 0xbf, 0x1a, 0x09, 0xde}, + }, + { + addYX: fp.Elt{0xf3, 0x84, 0x76, 0x77, 0xa5, 0x6b, 0x27, 0x3b, 0x83, 0x3d, 0xdf, 0xa0, 0xeb, 0x32, 0x6d, 0x58, 0x81, 0x57, 0x64, 0xc2, 0x21, 0x7c, 0x9b, 0xea, 0xe6, 0xb0, 0x93, 0xf9, 0xe7, 0xc3, 0xed, 0x5a, 0x8e, 0xe2, 0xb4, 0x72, 0x76, 0x66, 0x0f, 0x22, 0x29, 0x94, 0x3e, 0x63, 0x48, 0x5e, 0x80, 0xcb, 0xac, 0xfa, 0x95, 0xb6, 0x4b, 0xc4, 0x95, 0x33}, + subYX: fp.Elt{0x0c, 0x55, 0xd1, 0x5e, 0x5f, 0xbf, 0xbf, 0xe2, 0x4c, 0xfc, 0x37, 0x4a, 0xc4, 0xb1, 0xf4, 0x83, 0x61, 0x93, 0x60, 0x8e, 0x9f, 0x31, 0xf0, 0xa0, 0x41, 0xff, 0x1d, 0xe2, 0x7f, 0xca, 0x40, 0xd6, 0x88, 0xe8, 0x91, 0x61, 0xe2, 0x11, 0x18, 0x83, 0xf3, 0x25, 0x2f, 0x3f, 0x49, 0x40, 0xd4, 0x83, 0xe2, 0xd7, 0x74, 0x6a, 0x16, 0x86, 0x4e, 0xab}, + dt2: fp.Elt{0xdd, 0x58, 0x65, 0xd8, 0x9f, 0xdd, 0x70, 0x7f, 0x0f, 0xec, 0xbd, 0x5c, 0x5c, 0x9b, 0x7e, 0x1b, 0x9f, 0x79, 0x36, 0x1f, 0xfd, 0x79, 0x10, 0x1c, 0x52, 0xf3, 0x22, 0xa4, 0x1f, 0x71, 0x6e, 0x63, 0x14, 0xf4, 0xa7, 0x3e, 0xbe, 0xad, 0x43, 0x30, 0x38, 0x8c, 0x29, 0xc6, 0xcf, 0x50, 0x75, 0x21, 0xe5, 0x78, 0xfd, 0xb0, 0x9a, 0xc4, 0x6d, 0xd4}, + }, + }, + { + { + addYX: fp.Elt{0x7a, 0xa1, 0x38, 0xa6, 0xfd, 0x0e, 0x96, 0xd5, 0x26, 0x76, 0x86, 0x70, 0x80, 0x30, 0xa6, 0x67, 0xeb, 0xf4, 0x39, 0xdb, 0x22, 0xf5, 0x9f, 0x98, 0xe4, 0xb5, 0x3a, 0x0c, 0x59, 0xbf, 0x85, 0xc6, 0xf0, 0x0b, 0x1c, 0x41, 0x38, 0x09, 0x01, 0xdb, 0xd6, 0x3c, 0xb7, 0xf1, 0x08, 0x6b, 0x4b, 0x9e, 0x63, 0x53, 0x83, 0xd3, 0xab, 0xa3, 0x72, 0x0d}, + subYX: fp.Elt{0x84, 0x68, 0x25, 0xe8, 0xe9, 0x8f, 0x91, 0xbf, 0xf7, 0xa4, 0x30, 0xae, 0xea, 0x9f, 0xdd, 0x56, 0x64, 0x09, 0xc9, 0x54, 0x68, 0x4e, 0x33, 0xc5, 0x6f, 0x7b, 0x2d, 0x52, 0x2e, 0x42, 0xbe, 0xbe, 0xf5, 0x64, 0xbf, 0x77, 0x54, 0xdf, 0xb0, 0x10, 0xd2, 0x16, 0x5d, 0xce, 0xaf, 0x9f, 0xfb, 0xa3, 0x63, 0x50, 0xcb, 0xc0, 0xd0, 0x88, 0x44, 0xa3}, + dt2: fp.Elt{0xc3, 0x8b, 0xa5, 0xf1, 0x44, 0xe4, 0x41, 0xcd, 0x75, 0xe3, 0x17, 0x69, 0x5b, 0xb9, 0xbb, 0xee, 0x82, 0xbb, 0xce, 0x57, 0xdf, 0x2a, 0x9c, 0x12, 0xab, 0x66, 0x08, 0x68, 0x05, 0x1b, 0x87, 0xee, 0x5d, 0x1e, 0x18, 0x14, 0x22, 0x4b, 0x99, 0x61, 0x75, 0x28, 0xe7, 0x65, 0x1c, 0x36, 0xb6, 0x18, 0x09, 0xa8, 0xdf, 0xef, 0x30, 0x35, 0xbc, 0x58}, + }, + { + addYX: fp.Elt{0xc5, 0xd3, 0x0e, 0x6f, 0xaf, 0x06, 0x69, 0xc4, 0x07, 0x9e, 0x58, 0x6e, 0x3f, 0x49, 0xd9, 0x0a, 0x3c, 0x2c, 0x37, 0xcd, 0x27, 0x4d, 0x87, 0x91, 0x7a, 0xb0, 0x28, 0xad, 0x2f, 0x68, 0x92, 0x05, 0x97, 0xf1, 0x30, 0x5f, 0x4c, 0x10, 0x20, 0x30, 0xd3, 0x08, 0x3f, 0xc1, 0xc6, 0xb7, 0xb5, 0xd1, 0x71, 0x7b, 0xa8, 0x0a, 0xd8, 0xf5, 0x17, 0xcf}, + subYX: fp.Elt{0x64, 0xd4, 0x8f, 0x91, 0x40, 0xab, 0x6e, 0x1a, 0x62, 0x83, 0xdc, 0xd7, 0x30, 0x1a, 0x4a, 0x2a, 0x4c, 0x54, 0x86, 0x19, 0x81, 0x5d, 0x04, 0x52, 0xa3, 0xca, 0x82, 0x38, 0xdc, 0x1e, 0xf0, 0x7a, 0x78, 0x76, 0x49, 0x4f, 0x71, 0xc4, 0x74, 0x2f, 0xf0, 0x5b, 0x2e, 0x5e, 0xac, 0xef, 0x17, 0xe4, 0x8e, 0x6e, 0xed, 0x43, 0x23, 0x61, 0x99, 0x49}, + dt2: fp.Elt{0x64, 0x90, 0x72, 0x76, 0xf8, 0x2c, 0x7d, 0x57, 0xf9, 0x30, 0x5e, 0x7a, 0x10, 0x74, 0x19, 0x39, 0xd9, 0xaf, 0x0a, 0xf1, 0x43, 0xed, 0x88, 0x9c, 0x8b, 0xdc, 0x9b, 0x1c, 0x90, 0xe7, 0xf7, 0xa3, 0xa5, 0x0d, 0xc6, 0xbc, 0x30, 0xfb, 0x91, 0x1a, 0x51, 0xba, 0x2d, 0xbe, 0x89, 0xdf, 0x1d, 0xdc, 0x53, 0xa8, 0x82, 0x8a, 0xd3, 0x8d, 0x16, 0x68}, + }, + { + addYX: fp.Elt{0xef, 0x5c, 0xe3, 0x74, 0xbf, 0x13, 0x4a, 0xbf, 0x66, 0x73, 0x64, 0xb7, 0xd4, 0xce, 0x98, 0x82, 0x05, 0xfa, 0x98, 0x0c, 0x0a, 0xae, 0xe5, 0x6b, 0x9f, 0xac, 0xbb, 0x6e, 0x1f, 0xcf, 0xff, 0xa6, 0x71, 0x9a, 0xa8, 0x7a, 0x9e, 0x64, 0x1f, 0x20, 0x4a, 0x61, 0xa2, 0xd6, 0x50, 0xe3, 0xba, 0x81, 0x0c, 0x50, 0x59, 0x69, 0x59, 0x15, 0x55, 0xdb}, + subYX: fp.Elt{0xe8, 0x77, 0x4d, 0xe8, 0x66, 0x3d, 0xc1, 0x00, 0x3c, 0xf2, 0x25, 0x00, 0xdc, 0xb2, 0xe5, 0x9b, 0x12, 0x89, 0xf3, 0xd6, 0xea, 0x85, 0x60, 0xfe, 0x67, 0x91, 0xfd, 0x04, 0x7c, 0xe0, 0xf1, 0x86, 0x06, 0x11, 0x66, 0xee, 0xd4, 0xd5, 0xbe, 0x3b, 0x0f, 0xe3, 0x59, 0xb3, 0x4f, 0x00, 0xb6, 0xce, 0x80, 0xc1, 0x61, 0xf7, 0xaf, 0x04, 0x6a, 0x3c}, + dt2: fp.Elt{0x00, 0xd7, 0x32, 0x93, 0x67, 0x70, 0x6f, 0xd7, 0x69, 0xab, 0xb1, 0xd3, 0xdc, 0xd6, 0xa8, 0xdd, 0x35, 0x25, 0xca, 0xd3, 0x8a, 0x6d, 0xce, 0xfb, 0xfd, 0x2b, 0x83, 0xf0, 0xd4, 0xac, 0x66, 0xfb, 0x72, 0x87, 0x7e, 0x55, 0xb7, 0x91, 0x58, 0x10, 0xc3, 0x11, 0x7e, 0x15, 0xfe, 0x7c, 0x55, 0x90, 0xa3, 0x9e, 0xed, 0x9a, 0x7f, 0xa7, 0xb7, 0xeb}, + }, + { + addYX: fp.Elt{0x25, 0x0f, 0xc2, 0x09, 0x9c, 0x10, 0xc8, 0x7c, 0x93, 0xa7, 0xbe, 0xe9, 0x26, 0x25, 0x7c, 0x21, 0xfe, 0xe7, 0x5f, 0x3c, 0x02, 0x83, 0xa7, 0x9e, 0xdf, 0xc0, 0x94, 0x2b, 0x7d, 0x1a, 0xd0, 0x1d, 0xcc, 0x2e, 0x7d, 0xd4, 0x85, 0xe7, 0xc1, 0x15, 0x66, 0xd6, 0xd6, 0x32, 0xb8, 0xf7, 0x63, 0xaa, 0x3b, 0xa5, 0xea, 0x49, 0xad, 0x88, 0x9b, 0x66}, + subYX: fp.Elt{0x09, 0x97, 0x79, 0x36, 0x41, 0x56, 0x9b, 0xdf, 0x15, 0xd8, 0x43, 0x28, 0x17, 0x5b, 0x96, 0xc9, 0xcf, 0x39, 0x1f, 0x13, 0xf7, 0x4d, 0x1d, 0x1f, 0xda, 0x51, 0x56, 0xe7, 0x0a, 0x5a, 0x65, 0xb6, 0x2a, 0x87, 0x49, 0x86, 0xc2, 0x2b, 0xcd, 0xfe, 0x07, 0xf6, 0x4c, 0xe2, 0x1d, 0x9b, 0xd8, 0x82, 0x09, 0x5b, 0x11, 0x10, 0x62, 0x56, 0x89, 0xbd}, + dt2: fp.Elt{0xd9, 0x15, 0x73, 0xf2, 0x96, 0x35, 0x53, 0xb0, 0xe7, 0xa8, 0x0b, 0x93, 0x35, 0x0b, 0x3a, 0x00, 0xf5, 0x18, 0xb1, 0xc3, 0x12, 0x3f, 0x91, 0x17, 0xc1, 0x4c, 0x15, 0x5a, 0x86, 0x92, 0x11, 0xbd, 0x44, 0x40, 0x5a, 0x7b, 0x15, 0x89, 0xba, 0xc1, 0xc1, 0xbc, 0x43, 0x45, 0xe6, 0x52, 0x02, 0x73, 0x0a, 0xd0, 0x2a, 0x19, 0xda, 0x47, 0xa8, 0xff}, + }, + }, +} + +// tabVerif contains the odd multiples of P. The entry T[i] = (2i+1)P, where +// P = phi(G) and G is the generator of the Goldilocks curve, and phi is a +// 4-degree isogeny. +var tabVerif = [1 << (omegaFix - 2)]preTwistPointAffine{ + { /* 1P*/ + addYX: fp.Elt{0x65, 0x4a, 0xdd, 0xdf, 0xb4, 0x79, 0x60, 0xc8, 0xa1, 0x70, 0xb4, 0x3a, 0x1e, 0x0c, 0x9b, 0x19, 0xe5, 0x48, 0x3f, 0xd7, 0x44, 0x18, 0x18, 0x14, 0x14, 0x27, 0x45, 0xd0, 0x2b, 0x24, 0xd5, 0x93, 0xc3, 0x74, 0x4c, 0x50, 0x70, 0x43, 0x26, 0x05, 0x08, 0x24, 0xca, 0x78, 0x30, 0xc1, 0x06, 0x8d, 0xd4, 0x86, 0x42, 0xf0, 0x14, 0xde, 0x08, 0x05}, + subYX: fp.Elt{0x64, 0x4a, 0xdd, 0xdf, 0xb4, 0x79, 0x60, 0xc8, 0xa1, 0x70, 0xb4, 0x3a, 0x1e, 0x0c, 0x9b, 0x19, 0xe5, 0x48, 0x3f, 0xd7, 0x44, 0x18, 0x18, 0x14, 0x14, 0x27, 0x45, 0xd0, 0x2d, 0x24, 0xd5, 0x93, 0xc3, 0x74, 0x4c, 0x50, 0x70, 0x43, 0x26, 0x05, 0x08, 0x24, 0xca, 0x78, 0x30, 0xc1, 0x06, 0x8d, 0xd4, 0x86, 0x42, 0xf0, 0x14, 0xde, 0x08, 0x05}, + dt2: fp.Elt{0x1a, 0x33, 0xea, 0x64, 0x45, 0x1c, 0xdf, 0x17, 0x1d, 0x16, 0x34, 0x28, 0xd6, 0x61, 0x19, 0x67, 0x79, 0xb4, 0x13, 0xcf, 0x3e, 0x7c, 0x0e, 0x72, 0xda, 0xf1, 0x5f, 0xda, 0xe6, 0xcf, 0x42, 0xd3, 0xb6, 0x17, 0xc2, 0x68, 0x13, 0x2d, 0xd9, 0x60, 0x3e, 0xae, 0xf0, 0x5b, 0x96, 0xf0, 0xcd, 0xaf, 0xea, 0xb7, 0x0d, 0x59, 0x16, 0xa7, 0xff, 0x55}, + }, + { /* 3P*/ + addYX: fp.Elt{0xd1, 0xe9, 0xa8, 0x33, 0x20, 0x76, 0x18, 0x08, 0x45, 0x2a, 0xc9, 0x67, 0x2a, 0xc3, 0x15, 0x24, 0xf9, 0x74, 0x21, 0x30, 0x99, 0x59, 0x8b, 0xb2, 0xf0, 0xa4, 0x07, 0xe2, 0x6a, 0x36, 0x8d, 0xd9, 0xd2, 0x4a, 0x7f, 0x73, 0x50, 0x39, 0x3d, 0xaa, 0xa7, 0x51, 0x73, 0x0d, 0x2b, 0x8b, 0x96, 0x47, 0xac, 0x3c, 0x5d, 0xaa, 0x39, 0x9c, 0xcf, 0xd5}, + subYX: fp.Elt{0x6b, 0x11, 0x5d, 0x1a, 0xf9, 0x41, 0x9d, 0xc5, 0x30, 0x3e, 0xad, 0x25, 0x2c, 0x04, 0x45, 0xea, 0xcc, 0x67, 0x07, 0x85, 0xe9, 0xda, 0x0e, 0xb5, 0x40, 0xb7, 0x32, 0xb4, 0x49, 0xdd, 0xff, 0xaa, 0xfc, 0xbb, 0x19, 0xca, 0x8b, 0x79, 0x2b, 0x8f, 0x8d, 0x00, 0x33, 0xc2, 0xad, 0xe9, 0xd3, 0x12, 0xa8, 0xaa, 0x87, 0x62, 0xad, 0x2d, 0xff, 0xa4}, + dt2: fp.Elt{0xb0, 0xaf, 0x3b, 0xea, 0xf0, 0x42, 0x0b, 0x5e, 0x88, 0xd3, 0x98, 0x08, 0x87, 0x59, 0x72, 0x0a, 0xc2, 0xdf, 0xcb, 0x7f, 0x59, 0xb5, 0x4c, 0x63, 0x68, 0xe8, 0x41, 0x38, 0x67, 0x4f, 0xe9, 0xc6, 0xb2, 0x6b, 0x08, 0xa7, 0xf7, 0x0e, 0xcd, 0xea, 0xca, 0x3d, 0xaf, 0x8e, 0xda, 0x4b, 0x2e, 0xd2, 0x88, 0x64, 0x8d, 0xc5, 0x5f, 0x76, 0x0f, 0x3d}, + }, + { /* 5P*/ + addYX: fp.Elt{0xe5, 0x65, 0xc9, 0xe2, 0x75, 0xf0, 0x7d, 0x1a, 0xba, 0xa4, 0x40, 0x4b, 0x93, 0x12, 0xa2, 0x80, 0x95, 0x0d, 0x03, 0x93, 0xe8, 0xa5, 0x4d, 0xe2, 0x3d, 0x81, 0xf5, 0xce, 0xd4, 0x2d, 0x25, 0x59, 0x16, 0x5c, 0xe7, 0xda, 0xc7, 0x45, 0xd2, 0x7e, 0x2c, 0x38, 0xd4, 0x37, 0x64, 0xb2, 0xc2, 0x28, 0xc5, 0x72, 0x16, 0x32, 0x45, 0x36, 0x6f, 0x9f}, + subYX: fp.Elt{0x09, 0xf4, 0x7e, 0xbd, 0x89, 0xdb, 0x19, 0x58, 0xe1, 0x08, 0x00, 0x8a, 0xf4, 0x5f, 0x2a, 0x32, 0x40, 0xf0, 0x2c, 0x3f, 0x5d, 0xe4, 0xfc, 0x89, 0x11, 0x24, 0xb4, 0x2f, 0x97, 0xad, 0xac, 0x8f, 0x19, 0xab, 0xfa, 0x12, 0xe5, 0xf9, 0x50, 0x4e, 0x50, 0x6f, 0x32, 0x30, 0x88, 0xa6, 0xe5, 0x48, 0x28, 0xa2, 0x1b, 0x9f, 0xcd, 0xe2, 0x43, 0x38}, + dt2: fp.Elt{0xa9, 0xcc, 0x53, 0x39, 0x86, 0x02, 0x60, 0x75, 0x34, 0x99, 0x57, 0xbd, 0xfc, 0x5a, 0x8e, 0xce, 0x5e, 0x98, 0x22, 0xd0, 0xa5, 0x24, 0xff, 0x90, 0x28, 0x9f, 0x58, 0xf3, 0x39, 0xe9, 0xba, 0x36, 0x23, 0xfb, 0x7f, 0x41, 0xcc, 0x2b, 0x5a, 0x25, 0x3f, 0x4c, 0x2a, 0xf1, 0x52, 0x6f, 0x2f, 0x07, 0xe3, 0x88, 0x81, 0x77, 0xdd, 0x7c, 0x88, 0x82}, + }, + { /* 7P*/ + addYX: fp.Elt{0xf7, 0xee, 0x88, 0xfd, 0x3a, 0xbf, 0x7e, 0x28, 0x39, 0x23, 0x79, 0xe6, 0x5c, 0x56, 0xcb, 0xb5, 0x48, 0x6a, 0x80, 0x6d, 0x37, 0x60, 0x6c, 0x10, 0x35, 0x49, 0x4b, 0x46, 0x60, 0xd4, 0x79, 0xd4, 0x53, 0xd3, 0x67, 0x88, 0xd0, 0x41, 0xd5, 0x43, 0x85, 0xc8, 0x71, 0xe3, 0x1c, 0xb6, 0xda, 0x22, 0x64, 0x8f, 0x80, 0xac, 0xad, 0x7d, 0xd5, 0x82}, + subYX: fp.Elt{0x92, 0x40, 0xc1, 0x83, 0x21, 0x9b, 0xd5, 0x7d, 0x3f, 0x29, 0xb6, 0x26, 0xef, 0x12, 0xb9, 0x27, 0x39, 0x42, 0x37, 0x97, 0x09, 0x9a, 0x08, 0xe1, 0x68, 0xb6, 0x7a, 0x3f, 0x9f, 0x45, 0xf8, 0x37, 0x19, 0x83, 0x97, 0xe6, 0x73, 0x30, 0x32, 0x35, 0xcf, 0xae, 0x5c, 0x12, 0x68, 0xdf, 0x6e, 0x2b, 0xde, 0x83, 0xa0, 0x44, 0x74, 0x2e, 0x4a, 0xe9}, + dt2: fp.Elt{0xcb, 0x22, 0x0a, 0xda, 0x6b, 0xc1, 0x8a, 0x29, 0xa1, 0xac, 0x8b, 0x5b, 0x8b, 0x32, 0x20, 0xf2, 0x21, 0xae, 0x0c, 0x43, 0xc4, 0xd7, 0x19, 0x37, 0x3d, 0x79, 0x25, 0x98, 0x6c, 0x9c, 0x22, 0x31, 0x2a, 0x55, 0x9f, 0xda, 0x5e, 0xa8, 0x13, 0xdb, 0x8e, 0x2e, 0x16, 0x39, 0xf4, 0x91, 0x6f, 0xec, 0x71, 0x71, 0xc9, 0x10, 0xf2, 0xa4, 0x8f, 0x11}, + }, + { /* 9P*/ + addYX: fp.Elt{0x85, 0xdd, 0x37, 0x62, 0x74, 0x8e, 0x33, 0x5b, 0x25, 0x12, 0x1b, 0xe7, 0xdf, 0x47, 0xe5, 0x12, 0xfd, 0x3a, 0x3a, 0xf5, 0x5d, 0x4c, 0xa2, 0x29, 0x3c, 0x5c, 0x2f, 0xee, 0x18, 0x19, 0x0a, 0x2b, 0xef, 0x67, 0x50, 0x7a, 0x0d, 0x29, 0xae, 0x55, 0x82, 0xcd, 0xd6, 0x41, 0x90, 0xb4, 0x13, 0x31, 0x5d, 0x11, 0xb8, 0xaa, 0x12, 0x86, 0x08, 0xac}, + subYX: fp.Elt{0xcc, 0x37, 0x8d, 0x83, 0x5f, 0xfd, 0xde, 0xd5, 0xf7, 0xf1, 0xae, 0x0a, 0xa7, 0x0b, 0xeb, 0x6d, 0x19, 0x8a, 0xb6, 0x1a, 0x59, 0xd8, 0xff, 0x3c, 0xbc, 0xbc, 0xef, 0x9c, 0xda, 0x7b, 0x75, 0x12, 0xaf, 0x80, 0x8f, 0x2c, 0x3c, 0xaa, 0x0b, 0x17, 0x86, 0x36, 0x78, 0x18, 0xc8, 0x8a, 0xf6, 0xb8, 0x2c, 0x2f, 0x57, 0x2c, 0x62, 0x57, 0xf6, 0x90}, + dt2: fp.Elt{0x83, 0xbc, 0xa2, 0x07, 0xa5, 0x38, 0x96, 0xea, 0xfe, 0x11, 0x46, 0x1d, 0x3b, 0xcd, 0x42, 0xc5, 0xee, 0x67, 0x04, 0x72, 0x08, 0xd8, 0xd9, 0x96, 0x07, 0xf7, 0xac, 0xc3, 0x64, 0xf1, 0x98, 0x2c, 0x55, 0xd7, 0x7d, 0xc8, 0x6c, 0xbd, 0x2c, 0xff, 0x15, 0xd6, 0x6e, 0xb8, 0x17, 0x8e, 0xa8, 0x27, 0x66, 0xb1, 0x73, 0x79, 0x96, 0xff, 0x29, 0x10}, + }, + { /* 11P*/ + addYX: fp.Elt{0x76, 0xcb, 0x9b, 0x0c, 0x5b, 0xfe, 0xe1, 0x2a, 0xdd, 0x6f, 0x6c, 0xdd, 0x6f, 0xb4, 0xc0, 0xc2, 0x1b, 0x4b, 0x38, 0xe8, 0x66, 0x8c, 0x1e, 0x31, 0x63, 0xb9, 0x94, 0xcd, 0xc3, 0x8c, 0x44, 0x25, 0x7b, 0xd5, 0x39, 0x80, 0xfc, 0x01, 0xaa, 0xf7, 0x2a, 0x61, 0x8a, 0x25, 0xd2, 0x5f, 0xc5, 0x66, 0x38, 0xa4, 0x17, 0xcf, 0x3e, 0x11, 0x0f, 0xa3}, + subYX: fp.Elt{0xe0, 0xb6, 0xd1, 0x9c, 0x71, 0x49, 0x2e, 0x7b, 0xde, 0x00, 0xda, 0x6b, 0xf1, 0xec, 0xe6, 0x7a, 0x15, 0x38, 0x71, 0xe9, 0x7b, 0xdb, 0xf8, 0x98, 0xc0, 0x91, 0x2e, 0x53, 0xee, 0x92, 0x87, 0x25, 0xc9, 0xb0, 0xbb, 0x33, 0x15, 0x46, 0x7f, 0xfd, 0x4f, 0x8b, 0x77, 0x05, 0x96, 0xb6, 0xe2, 0x08, 0xdb, 0x0d, 0x09, 0xee, 0x5b, 0xd1, 0x2a, 0x63}, + dt2: fp.Elt{0x8f, 0x7b, 0x57, 0x8c, 0xbf, 0x06, 0x0d, 0x43, 0x21, 0x92, 0x94, 0x2d, 0x6a, 0x38, 0x07, 0x0f, 0xa0, 0xf1, 0xe3, 0xd8, 0x2a, 0xbf, 0x46, 0xc6, 0x9e, 0x1f, 0x8f, 0x2b, 0x46, 0x84, 0x0b, 0x74, 0xed, 0xff, 0xf8, 0xa5, 0x94, 0xae, 0xf1, 0x67, 0xb1, 0x9b, 0xdd, 0x4a, 0xd0, 0xdb, 0xc2, 0xb5, 0x58, 0x49, 0x0c, 0xa9, 0x1d, 0x7d, 0xa9, 0xd3}, + }, + { /* 13P*/ + addYX: fp.Elt{0x73, 0x84, 0x2e, 0x31, 0x1f, 0xdc, 0xed, 0x9f, 0x74, 0xfa, 0xe0, 0x35, 0xb1, 0x85, 0x6a, 0x8d, 0x86, 0xd0, 0xff, 0xd6, 0x08, 0x43, 0x73, 0x1a, 0xd5, 0xf8, 0x43, 0xd4, 0xb3, 0xe5, 0x3f, 0xa8, 0x84, 0x17, 0x59, 0x65, 0x4e, 0xe6, 0xee, 0x54, 0x9c, 0xda, 0x5e, 0x7e, 0x98, 0x29, 0x6d, 0x73, 0x34, 0x1f, 0x99, 0x80, 0x54, 0x54, 0x81, 0x0b}, + subYX: fp.Elt{0xb1, 0xe5, 0xbb, 0x80, 0x22, 0x9c, 0x81, 0x6d, 0xaf, 0x27, 0x65, 0x6f, 0x7e, 0x9c, 0xb6, 0x8d, 0x35, 0x5c, 0x2e, 0x20, 0x48, 0x7a, 0x28, 0xf0, 0x97, 0xfe, 0xb7, 0x71, 0xce, 0xd6, 0xad, 0x3a, 0x81, 0xf6, 0x74, 0x5e, 0xf3, 0xfd, 0x1b, 0xd4, 0x1e, 0x7c, 0xc2, 0xb7, 0xc8, 0xa6, 0xc9, 0x89, 0x03, 0x47, 0xec, 0x24, 0xd6, 0x0e, 0xec, 0x9c}, + dt2: fp.Elt{0x91, 0x0a, 0x43, 0x34, 0x20, 0xc2, 0x64, 0xf7, 0x4e, 0x48, 0xc8, 0xd2, 0x95, 0x83, 0xd1, 0xa4, 0xfb, 0x4e, 0x41, 0x3b, 0x0d, 0xd5, 0x07, 0xd9, 0xf1, 0x13, 0x16, 0x78, 0x54, 0x57, 0xd0, 0xf1, 0x4f, 0x20, 0xac, 0xcf, 0x9c, 0x3b, 0x33, 0x0b, 0x99, 0x54, 0xc3, 0x7f, 0x3e, 0x57, 0x26, 0x86, 0xd5, 0xa5, 0x2b, 0x8d, 0xe3, 0x19, 0x36, 0xf7}, + }, + { /* 15P*/ + addYX: fp.Elt{0x23, 0x69, 0x47, 0x14, 0xf9, 0x9a, 0x50, 0xff, 0x64, 0xd1, 0x50, 0x35, 0xc3, 0x11, 0xd3, 0x19, 0xcf, 0x87, 0xda, 0x30, 0x0b, 0x50, 0xda, 0xc0, 0xe0, 0x25, 0x00, 0xe5, 0x68, 0x93, 0x04, 0xc2, 0xaf, 0xbd, 0x2f, 0x36, 0x5f, 0x47, 0x96, 0x10, 0xa8, 0xbd, 0xe4, 0x88, 0xac, 0x80, 0x52, 0x61, 0x73, 0xe9, 0x63, 0xdd, 0x99, 0xad, 0x20, 0x5b}, + subYX: fp.Elt{0x1b, 0x5e, 0xa2, 0x2a, 0x25, 0x0f, 0x86, 0xc0, 0xb1, 0x2e, 0x0c, 0x13, 0x40, 0x8d, 0xf0, 0xe6, 0x00, 0x55, 0x08, 0xc5, 0x7d, 0xf4, 0xc9, 0x31, 0x25, 0x3a, 0x99, 0x69, 0xdd, 0x67, 0x63, 0x9a, 0xd6, 0x89, 0x2e, 0xa1, 0x19, 0xca, 0x2c, 0xd9, 0x59, 0x5f, 0x5d, 0xc3, 0x6e, 0x62, 0x36, 0x12, 0x59, 0x15, 0xe1, 0xdc, 0xa4, 0xad, 0xc9, 0xd0}, + dt2: fp.Elt{0xbc, 0xea, 0xfc, 0xaf, 0x66, 0x23, 0xb7, 0x39, 0x6b, 0x2a, 0x96, 0xa8, 0x54, 0x43, 0xe9, 0xaa, 0x32, 0x40, 0x63, 0x92, 0x5e, 0xdf, 0x35, 0xc2, 0x9f, 0x24, 0x0c, 0xed, 0xfc, 0xde, 0x73, 0x8f, 0xa7, 0xd5, 0xa3, 0x2b, 0x18, 0x1f, 0xb0, 0xf8, 0xeb, 0x55, 0xd9, 0xc3, 0xfd, 0x28, 0x7c, 0x4f, 0xce, 0x0d, 0xf7, 0xae, 0xc2, 0x83, 0xc3, 0x78}, + }, + { /* 17P*/ + addYX: fp.Elt{0x71, 0xe6, 0x60, 0x93, 0x37, 0xdb, 0x01, 0xa5, 0x4c, 0xba, 0xe8, 0x8e, 0xd5, 0xf9, 0xd3, 0x98, 0xe5, 0xeb, 0xab, 0x3a, 0x15, 0x8b, 0x35, 0x60, 0xbe, 0xe5, 0x9c, 0x2d, 0x10, 0x9b, 0x2e, 0xcf, 0x65, 0x64, 0xea, 0x8f, 0x72, 0xce, 0xf5, 0x18, 0xe5, 0xe2, 0xf0, 0x0e, 0xae, 0x04, 0xec, 0xa0, 0x20, 0x65, 0x63, 0x07, 0xb1, 0x9f, 0x03, 0x97}, + subYX: fp.Elt{0x9e, 0x41, 0x64, 0x30, 0x95, 0x7f, 0x3a, 0x89, 0x7b, 0x0a, 0x79, 0x59, 0x23, 0x9a, 0x3b, 0xfe, 0xa4, 0x13, 0x08, 0xb2, 0x2e, 0x04, 0x50, 0x10, 0x30, 0xcd, 0x2e, 0xa4, 0x91, 0x71, 0x50, 0x36, 0x4a, 0x02, 0xf4, 0x8d, 0xa3, 0x36, 0x1b, 0xf4, 0x52, 0xba, 0x15, 0x04, 0x8b, 0x80, 0x25, 0xd9, 0xae, 0x67, 0x20, 0xd9, 0x88, 0x8f, 0x97, 0xa6}, + dt2: fp.Elt{0xb5, 0xe7, 0x46, 0xbd, 0x55, 0x23, 0xa0, 0x68, 0xc0, 0x12, 0xd9, 0xf1, 0x0a, 0x75, 0xe2, 0xda, 0xf4, 0x6b, 0xca, 0x14, 0xe4, 0x9f, 0x0f, 0xb5, 0x3c, 0xa6, 0xa5, 0xa2, 0x63, 0x94, 0xd1, 0x1c, 0x39, 0x58, 0x57, 0x02, 0x27, 0x98, 0xb6, 0x47, 0xc6, 0x61, 0x4b, 0x5c, 0xab, 0x6f, 0x2d, 0xab, 0xe3, 0xc1, 0x69, 0xf9, 0x12, 0xb0, 0xc8, 0xd5}, + }, + { /* 19P*/ + addYX: fp.Elt{0x19, 0x7d, 0xd5, 0xac, 0x79, 0xa2, 0x82, 0x9b, 0x28, 0x31, 0x22, 0xc0, 0x73, 0x02, 0x76, 0x17, 0x10, 0x70, 0x79, 0x57, 0xc9, 0x84, 0x62, 0x8e, 0x04, 0x04, 0x61, 0x67, 0x08, 0x48, 0xb4, 0x4b, 0xde, 0x53, 0x8c, 0xff, 0x36, 0x1b, 0x62, 0x86, 0x5d, 0xe1, 0x9b, 0xb1, 0xe5, 0xe8, 0x44, 0x64, 0xa1, 0x68, 0x3f, 0xa8, 0x45, 0x52, 0x91, 0xed}, + subYX: fp.Elt{0x42, 0x1a, 0x36, 0x1f, 0x90, 0x15, 0x24, 0x8d, 0x24, 0x80, 0xe6, 0xfe, 0x1e, 0xf0, 0xad, 0xaf, 0x6a, 0x93, 0xf0, 0xa6, 0x0d, 0x5d, 0xea, 0xf6, 0x62, 0x96, 0x7a, 0x05, 0x76, 0x85, 0x74, 0x32, 0xc7, 0xc8, 0x64, 0x53, 0x62, 0xe7, 0x54, 0x84, 0xe0, 0x40, 0x66, 0x19, 0x70, 0x40, 0x95, 0x35, 0x68, 0x64, 0x43, 0xcd, 0xba, 0x29, 0x32, 0xa8}, + dt2: fp.Elt{0x3e, 0xf6, 0xd6, 0xe4, 0x99, 0xeb, 0x20, 0x66, 0x08, 0x2e, 0x26, 0x64, 0xd7, 0x76, 0xf3, 0xb4, 0xc5, 0xa4, 0x35, 0x92, 0xd2, 0x99, 0x70, 0x5a, 0x1a, 0xe9, 0xe9, 0x3d, 0x3b, 0xe1, 0xcd, 0x0e, 0xee, 0x24, 0x13, 0x03, 0x22, 0xd6, 0xd6, 0x72, 0x08, 0x2b, 0xde, 0xfd, 0x93, 0xed, 0x0c, 0x7f, 0x5e, 0x31, 0x22, 0x4d, 0x80, 0x78, 0xc0, 0x48}, + }, + { /* 21P*/ + addYX: fp.Elt{0x8f, 0x72, 0xd2, 0x9e, 0xc4, 0xcd, 0x2c, 0xbf, 0xa8, 0xd3, 0x24, 0x62, 0x28, 0xee, 0x39, 0x0a, 0x19, 0x3a, 0x58, 0xff, 0x21, 0x2e, 0x69, 0x6c, 0x6e, 0x18, 0xd0, 0xcd, 0x61, 0xc1, 0x18, 0x02, 0x5a, 0xe9, 0xe3, 0xef, 0x1f, 0x8e, 0x10, 0xe8, 0x90, 0x2b, 0x48, 0xcd, 0xee, 0x38, 0xbd, 0x3a, 0xca, 0xbc, 0x2d, 0xe2, 0x3a, 0x03, 0x71, 0x02}, + subYX: fp.Elt{0xf8, 0xa4, 0x32, 0x26, 0x66, 0xaf, 0x3b, 0x53, 0xe7, 0xb0, 0x91, 0x92, 0xf5, 0x3c, 0x74, 0xce, 0xf2, 0xdd, 0x68, 0xa9, 0xf4, 0xcd, 0x5f, 0x60, 0xab, 0x71, 0xdf, 0xcd, 0x5c, 0x5d, 0x51, 0x72, 0x3a, 0x96, 0xea, 0xd6, 0xde, 0x54, 0x8e, 0x55, 0x4c, 0x08, 0x4c, 0x60, 0xdd, 0x34, 0xa9, 0x6f, 0xf3, 0x04, 0x02, 0xa8, 0xa6, 0x4e, 0x4d, 0x62}, + dt2: fp.Elt{0x76, 0x4a, 0xae, 0x38, 0x62, 0x69, 0x72, 0xdc, 0xe8, 0x43, 0xbe, 0x1d, 0x61, 0xde, 0x31, 0xc3, 0x42, 0x8f, 0x33, 0x9d, 0xca, 0xc7, 0x9c, 0xec, 0x6a, 0xe2, 0xaa, 0x01, 0x49, 0x78, 0x8d, 0x72, 0x4f, 0x38, 0xea, 0x52, 0xc2, 0xd3, 0xc9, 0x39, 0x71, 0xba, 0xb9, 0x09, 0x9b, 0xa3, 0x7f, 0x45, 0x43, 0x65, 0x36, 0x29, 0xca, 0xe7, 0x5c, 0x5f}, + }, + { /* 23P*/ + addYX: fp.Elt{0x89, 0x42, 0x35, 0x48, 0x6d, 0x74, 0xe5, 0x1f, 0xc3, 0xdd, 0x28, 0x5b, 0x84, 0x41, 0x33, 0x9f, 0x42, 0xf3, 0x1d, 0x5d, 0x15, 0x6d, 0x76, 0x33, 0x36, 0xaf, 0xe9, 0xdd, 0xfa, 0x63, 0x4f, 0x7a, 0x9c, 0xeb, 0x1c, 0x4f, 0x34, 0x65, 0x07, 0x54, 0xbb, 0x4c, 0x8b, 0x62, 0x9d, 0xd0, 0x06, 0x99, 0xb3, 0xe9, 0xda, 0x85, 0x19, 0xb0, 0x3d, 0x3c}, + subYX: fp.Elt{0xbb, 0x99, 0xf6, 0xbf, 0xaf, 0x2c, 0x22, 0x0d, 0x7a, 0xaa, 0x98, 0x6f, 0x01, 0x82, 0x99, 0xcf, 0x88, 0xbd, 0x0e, 0x3a, 0x89, 0xe0, 0x9c, 0x8c, 0x17, 0x20, 0xc4, 0xe0, 0xcf, 0x43, 0x7a, 0xef, 0x0d, 0x9f, 0x87, 0xd4, 0xfb, 0xf2, 0x96, 0xb8, 0x03, 0xe8, 0xcb, 0x5c, 0xec, 0x65, 0x5f, 0x49, 0xa4, 0x7c, 0x85, 0xb4, 0xf6, 0xc7, 0xdb, 0xa3}, + dt2: fp.Elt{0x11, 0xf3, 0x32, 0xa3, 0xa7, 0xb2, 0x7d, 0x51, 0x82, 0x44, 0xeb, 0xa2, 0x7d, 0x72, 0xcb, 0xc6, 0xf6, 0xc7, 0xb2, 0x38, 0x0e, 0x0f, 0x4f, 0x29, 0x00, 0xe4, 0x5b, 0x94, 0x46, 0x86, 0x66, 0xa1, 0x83, 0xb3, 0xeb, 0x15, 0xb6, 0x31, 0x50, 0x28, 0xeb, 0xed, 0x0d, 0x32, 0x39, 0xe9, 0x23, 0x81, 0x99, 0x3e, 0xff, 0x17, 0x4c, 0x11, 0x43, 0xd1}, + }, + { /* 25P*/ + addYX: fp.Elt{0xce, 0xe7, 0xf8, 0x94, 0x8f, 0x96, 0xf8, 0x96, 0xe6, 0x72, 0x20, 0x44, 0x2c, 0xa7, 0xfc, 0xba, 0xc8, 0xe1, 0xbb, 0xc9, 0x16, 0x85, 0xcd, 0x0b, 0xe5, 0xb5, 0x5a, 0x7f, 0x51, 0x43, 0x63, 0x8b, 0x23, 0x8e, 0x1d, 0x31, 0xff, 0x46, 0x02, 0x66, 0xcc, 0x9e, 0x4d, 0xa2, 0xca, 0xe2, 0xc7, 0xfd, 0x22, 0xb1, 0xdb, 0xdf, 0x6f, 0xe6, 0xa5, 0x82}, + subYX: fp.Elt{0xd0, 0xf5, 0x65, 0x40, 0xec, 0x8e, 0x65, 0x42, 0x78, 0xc1, 0x65, 0xe4, 0x10, 0xc8, 0x0b, 0x1b, 0xdd, 0x96, 0x68, 0xce, 0xee, 0x45, 0x55, 0xd8, 0x6e, 0xd3, 0xe6, 0x77, 0x19, 0xae, 0xc2, 0x8d, 0x8d, 0x3e, 0x14, 0x3f, 0x6d, 0x00, 0x2f, 0x9b, 0xd1, 0x26, 0x60, 0x28, 0x0f, 0x3a, 0x47, 0xb3, 0xe6, 0x68, 0x28, 0x24, 0x25, 0xca, 0xc8, 0x06}, + dt2: fp.Elt{0x54, 0xbb, 0x60, 0x92, 0xdb, 0x8f, 0x0f, 0x38, 0xe0, 0xe6, 0xe4, 0xc9, 0xcc, 0x14, 0x62, 0x01, 0xc4, 0x2b, 0x0f, 0xcf, 0xed, 0x7d, 0x8e, 0xa4, 0xd9, 0x73, 0x0b, 0xba, 0x0c, 0xaf, 0x0c, 0xf9, 0xe2, 0xeb, 0x29, 0x2a, 0x53, 0xdf, 0x2c, 0x5a, 0xfa, 0x8f, 0xc1, 0x01, 0xd7, 0xb1, 0x45, 0x73, 0x92, 0x32, 0x83, 0x85, 0x12, 0x74, 0x89, 0x44}, + }, + { /* 27P*/ + addYX: fp.Elt{0x0b, 0x73, 0x3c, 0xc2, 0xb1, 0x2e, 0xe1, 0xa7, 0xf5, 0xc9, 0x7a, 0xfb, 0x3d, 0x2d, 0xac, 0x59, 0xdb, 0xfa, 0x36, 0x11, 0xd1, 0x13, 0x04, 0x51, 0x1d, 0xab, 0x9b, 0x6b, 0x93, 0xfe, 0xda, 0xb0, 0x8e, 0xb4, 0x79, 0x11, 0x21, 0x0f, 0x65, 0xb9, 0xbb, 0x79, 0x96, 0x2a, 0xfd, 0x30, 0xe0, 0xb4, 0x2d, 0x9a, 0x55, 0x25, 0x5d, 0xd4, 0xad, 0x2a}, + subYX: fp.Elt{0x9e, 0xc5, 0x04, 0xfe, 0xec, 0x3c, 0x64, 0x1c, 0xed, 0x95, 0xed, 0xae, 0xaf, 0x5c, 0x6e, 0x08, 0x9e, 0x02, 0x29, 0x59, 0x7e, 0x5f, 0xc4, 0x9a, 0xd5, 0x32, 0x72, 0x86, 0xe1, 0x4e, 0x3c, 0xce, 0x99, 0x69, 0x3b, 0xc4, 0xdd, 0x4d, 0xb7, 0xbb, 0xda, 0x3b, 0x1a, 0x99, 0xaa, 0x62, 0x15, 0xc1, 0xf0, 0xb6, 0x6c, 0xec, 0x56, 0xc1, 0xff, 0x0c}, + dt2: fp.Elt{0x2f, 0xf1, 0x3f, 0x7a, 0x2d, 0x56, 0x19, 0x7f, 0xea, 0xbe, 0x59, 0x2e, 0x13, 0x67, 0x81, 0xfb, 0xdb, 0xc8, 0xa3, 0x1d, 0xd5, 0xe9, 0x13, 0x8b, 0x29, 0xdf, 0xcf, 0x9f, 0xe7, 0xd9, 0x0b, 0x70, 0xd3, 0x15, 0x57, 0x4a, 0xe9, 0x50, 0x12, 0x1b, 0x81, 0x4b, 0x98, 0x98, 0xa8, 0x31, 0x1d, 0x27, 0x47, 0x38, 0xed, 0x57, 0x99, 0x26, 0xb2, 0xee}, + }, + { /* 29P*/ + addYX: fp.Elt{0x1c, 0xb2, 0xb2, 0x67, 0x3b, 0x8b, 0x3d, 0x5a, 0x30, 0x7e, 0x38, 0x7e, 0x3c, 0x3d, 0x28, 0x56, 0x59, 0xd8, 0x87, 0x53, 0x8b, 0xe6, 0x6c, 0x5d, 0xe5, 0x0a, 0x33, 0x10, 0xce, 0xa2, 0x17, 0x0d, 0xe8, 0x76, 0xee, 0x68, 0xa8, 0x72, 0x54, 0xbd, 0xa6, 0x24, 0x94, 0x6e, 0x77, 0xc7, 0x53, 0xb7, 0x89, 0x1c, 0x7a, 0xe9, 0x78, 0x9a, 0x74, 0x5f}, + subYX: fp.Elt{0x76, 0x96, 0x1c, 0xcf, 0x08, 0x55, 0xd8, 0x1e, 0x0d, 0xa3, 0x59, 0x95, 0x32, 0xf4, 0xc2, 0x8e, 0x84, 0x5e, 0x4b, 0x04, 0xda, 0x71, 0xc9, 0x78, 0x52, 0xde, 0x14, 0xb4, 0x31, 0xf4, 0xd4, 0xb8, 0x58, 0xc5, 0x20, 0xe8, 0xdd, 0x15, 0xb5, 0xee, 0xea, 0x61, 0xe0, 0xf5, 0xd6, 0xae, 0x55, 0x59, 0x05, 0x3e, 0xaf, 0x74, 0xac, 0x1f, 0x17, 0x82}, + dt2: fp.Elt{0x59, 0x24, 0xcd, 0xfc, 0x11, 0x7e, 0x85, 0x18, 0x3d, 0x69, 0xf7, 0x71, 0x31, 0x66, 0x98, 0x42, 0x95, 0x00, 0x8c, 0xb2, 0xae, 0x39, 0x7e, 0x85, 0xd6, 0xb0, 0x02, 0xec, 0xce, 0xfc, 0x25, 0xb2, 0xe3, 0x99, 0x8e, 0x5b, 0x61, 0x96, 0x2e, 0x6d, 0x96, 0x57, 0x71, 0xa5, 0x93, 0x41, 0x0e, 0x6f, 0xfd, 0x0a, 0xbf, 0xa9, 0xf7, 0x56, 0xa9, 0x3e}, + }, + { /* 31P*/ + addYX: fp.Elt{0xa2, 0x2e, 0x0c, 0x17, 0x4d, 0xcc, 0x85, 0x2c, 0x18, 0xa0, 0xd2, 0x08, 0xba, 0x11, 0xfa, 0x47, 0x71, 0x86, 0xaf, 0x36, 0x6a, 0xd7, 0xfe, 0xb9, 0xb0, 0x2f, 0x89, 0x98, 0x49, 0x69, 0xf8, 0x6a, 0xad, 0x27, 0x5e, 0x0a, 0x22, 0x60, 0x5e, 0x5d, 0xca, 0x06, 0x51, 0x27, 0x99, 0x29, 0x85, 0x68, 0x98, 0xe1, 0xc4, 0x21, 0x50, 0xa0, 0xe9, 0xc1}, + subYX: fp.Elt{0x4d, 0x70, 0xee, 0x91, 0x92, 0x3f, 0xb7, 0xd3, 0x1d, 0xdb, 0x8d, 0x6e, 0x16, 0xf5, 0x65, 0x7d, 0x5f, 0xb5, 0x6c, 0x59, 0x26, 0x70, 0x4b, 0xf2, 0xfc, 0xe7, 0xdf, 0x86, 0xfe, 0xa5, 0xa7, 0xa6, 0x5d, 0xfb, 0x06, 0xe9, 0xf9, 0xcc, 0xc0, 0x37, 0xcc, 0xd8, 0x09, 0x04, 0xd2, 0xa5, 0x1d, 0xd7, 0xb7, 0xce, 0x92, 0xac, 0x3c, 0xad, 0xfb, 0xae}, + dt2: fp.Elt{0x17, 0xa3, 0x9a, 0xc7, 0x86, 0x2a, 0x51, 0xf7, 0x96, 0x79, 0x49, 0x22, 0x2e, 0x5a, 0x01, 0x5c, 0xb5, 0x95, 0xd4, 0xe8, 0xcb, 0x00, 0xca, 0x2d, 0x55, 0xb6, 0x34, 0x36, 0x0b, 0x65, 0x46, 0xf0, 0x49, 0xfc, 0x87, 0x86, 0xe5, 0xc3, 0x15, 0xdb, 0x32, 0xcd, 0xf2, 0xd3, 0x82, 0x4c, 0xe6, 0x61, 0x8a, 0xaf, 0xd4, 0x9e, 0x0f, 0x5a, 0xf2, 0x81}, + }, + { /* 33P*/ + addYX: fp.Elt{0x88, 0x10, 0xc0, 0xcb, 0xf5, 0x77, 0xae, 0xa5, 0xbe, 0xf6, 0xcd, 0x2e, 0x8b, 0x7e, 0xbd, 0x79, 0x62, 0x4a, 0xeb, 0x69, 0xc3, 0x28, 0xaa, 0x72, 0x87, 0xa9, 0x25, 0x87, 0x46, 0xea, 0x0e, 0x62, 0xa3, 0x6a, 0x1a, 0xe2, 0xba, 0xdc, 0x81, 0x10, 0x33, 0x01, 0xf6, 0x16, 0x89, 0x80, 0xc6, 0xcd, 0xdb, 0xdc, 0xba, 0x0e, 0x09, 0x4a, 0x35, 0x4a}, + subYX: fp.Elt{0x86, 0xb2, 0x2b, 0xd0, 0xb8, 0x4a, 0x6d, 0x66, 0x7b, 0x32, 0xdf, 0x3b, 0x1a, 0x19, 0x1f, 0x63, 0xee, 0x1f, 0x3d, 0x1c, 0x5c, 0x14, 0x60, 0x5b, 0x72, 0x49, 0x07, 0xb1, 0x0d, 0x72, 0xc6, 0x35, 0xf0, 0xbc, 0x5e, 0xda, 0x80, 0x6b, 0x64, 0x5b, 0xe5, 0x34, 0x54, 0x39, 0xdd, 0xe6, 0x3c, 0xcb, 0xe5, 0x29, 0x32, 0x06, 0xc6, 0xb1, 0x96, 0x34}, + dt2: fp.Elt{0x85, 0x86, 0xf5, 0x84, 0x86, 0xe6, 0x77, 0x8a, 0x71, 0x85, 0x0c, 0x4f, 0x81, 0x5b, 0x29, 0x06, 0xb5, 0x2e, 0x26, 0x71, 0x07, 0x78, 0x07, 0xae, 0xbc, 0x95, 0x46, 0xc3, 0x65, 0xac, 0xe3, 0x76, 0x51, 0x7d, 0xd4, 0x85, 0x31, 0xe3, 0x43, 0xf3, 0x1b, 0x7c, 0xf7, 0x6b, 0x2c, 0xf8, 0x1c, 0xbb, 0x8d, 0xca, 0xab, 0x4b, 0xba, 0x7f, 0xa4, 0xe2}, + }, + { /* 35P*/ + addYX: fp.Elt{0x1a, 0xee, 0xe7, 0xa4, 0x8a, 0x9d, 0x53, 0x80, 0xc6, 0xb8, 0x4e, 0xdc, 0x89, 0xe0, 0xc4, 0x2b, 0x60, 0x52, 0x6f, 0xec, 0x81, 0xd2, 0x55, 0x6b, 0x1b, 0x6f, 0x17, 0x67, 0x8e, 0x42, 0x26, 0x4c, 0x65, 0x23, 0x29, 0xc6, 0x7b, 0xcd, 0x9f, 0xad, 0x4b, 0x42, 0xd3, 0x0c, 0x75, 0xc3, 0x8a, 0xf5, 0xbe, 0x9e, 0x55, 0xf7, 0x47, 0x5d, 0xbd, 0x3a}, + subYX: fp.Elt{0x0d, 0xa8, 0x3b, 0xf9, 0xc7, 0x7e, 0xc6, 0x86, 0x94, 0xc0, 0x01, 0xff, 0x27, 0xce, 0x43, 0xac, 0xe5, 0xe1, 0xd2, 0x8d, 0xc1, 0x22, 0x31, 0xbe, 0xe1, 0xaf, 0xf9, 0x4a, 0x78, 0xa1, 0x0c, 0xaa, 0xd4, 0x80, 0xe4, 0x09, 0x8d, 0xfb, 0x1d, 0x52, 0xc8, 0x60, 0x2d, 0xf2, 0xa2, 0x89, 0x02, 0x56, 0x3d, 0x56, 0x27, 0x85, 0xc7, 0xf0, 0x2b, 0x9a}, + dt2: fp.Elt{0x62, 0x7c, 0xc7, 0x6b, 0x2c, 0x9d, 0x0a, 0x7c, 0xe5, 0x50, 0x3c, 0xe6, 0x87, 0x1c, 0x82, 0x30, 0x67, 0x3c, 0x39, 0xb6, 0xa0, 0x31, 0xfb, 0x03, 0x7b, 0xa1, 0x58, 0xdf, 0x12, 0x76, 0x5d, 0x5d, 0x0a, 0x8f, 0x9b, 0x37, 0x32, 0xc3, 0x60, 0x33, 0xea, 0x9f, 0x0a, 0x99, 0xfa, 0x20, 0xd0, 0x33, 0x21, 0xc3, 0x94, 0xd4, 0x86, 0x49, 0x7c, 0x4e}, + }, + { /* 37P*/ + addYX: fp.Elt{0xc7, 0x0c, 0x71, 0xfe, 0x55, 0xd1, 0x95, 0x8f, 0x43, 0xbb, 0x6b, 0x74, 0x30, 0xbd, 0xe8, 0x6f, 0x1c, 0x1b, 0x06, 0x62, 0xf5, 0xfc, 0x65, 0xa0, 0xeb, 0x81, 0x12, 0xc9, 0x64, 0x66, 0x61, 0xde, 0xf3, 0x6d, 0xd4, 0xae, 0x8e, 0xb1, 0x72, 0xe0, 0xcd, 0x37, 0x01, 0x28, 0x52, 0xd7, 0x39, 0x46, 0x0c, 0x55, 0xcf, 0x47, 0x70, 0xef, 0xa1, 0x17}, + subYX: fp.Elt{0x8d, 0x58, 0xde, 0x83, 0x88, 0x16, 0x0e, 0x12, 0x42, 0x03, 0x50, 0x60, 0x4b, 0xdf, 0xbf, 0x95, 0xcc, 0x7d, 0x18, 0x17, 0x7e, 0x31, 0x5d, 0x8a, 0x66, 0xc1, 0xcf, 0x14, 0xea, 0xf4, 0xf4, 0xe5, 0x63, 0x2d, 0x32, 0x86, 0x9b, 0xed, 0x1f, 0x4f, 0x03, 0xaf, 0x33, 0x92, 0xcb, 0xaf, 0x9c, 0x05, 0x0d, 0x47, 0x1b, 0x42, 0xba, 0x13, 0x22, 0x98}, + dt2: fp.Elt{0xb5, 0x48, 0xeb, 0x7d, 0x3d, 0x10, 0x9f, 0x59, 0xde, 0xf8, 0x1c, 0x4f, 0x7d, 0x9d, 0x40, 0x4d, 0x9e, 0x13, 0x24, 0xb5, 0x21, 0x09, 0xb7, 0xee, 0x98, 0x5c, 0x56, 0xbc, 0x5e, 0x2b, 0x78, 0x38, 0x06, 0xac, 0xe3, 0xe0, 0xfa, 0x2e, 0xde, 0x4f, 0xd2, 0xb3, 0xfb, 0x2d, 0x71, 0x84, 0xd1, 0x9d, 0x12, 0x5b, 0x35, 0xc8, 0x03, 0x68, 0x67, 0xc7}, + }, + { /* 39P*/ + addYX: fp.Elt{0xb6, 0x65, 0xfb, 0xa7, 0x06, 0x35, 0xbb, 0xe0, 0x31, 0x8d, 0x91, 0x40, 0x98, 0xab, 0x30, 0xe4, 0xca, 0x12, 0x59, 0x89, 0xed, 0x65, 0x5d, 0x7f, 0xae, 0x69, 0xa0, 0xa4, 0xfa, 0x78, 0xb4, 0xf7, 0xed, 0xae, 0x86, 0x78, 0x79, 0x64, 0x24, 0xa6, 0xd4, 0xe1, 0xf6, 0xd3, 0xa0, 0x89, 0xba, 0x20, 0xf4, 0x54, 0x0d, 0x8f, 0xdb, 0x1a, 0x79, 0xdb}, + subYX: fp.Elt{0xe1, 0x82, 0x0c, 0x4d, 0xde, 0x9f, 0x40, 0xf0, 0xc1, 0xbd, 0x8b, 0xd3, 0x24, 0x03, 0xcd, 0xf2, 0x92, 0x7d, 0xe2, 0x68, 0x7f, 0xf1, 0xbe, 0x69, 0xde, 0x34, 0x67, 0x4c, 0x85, 0x3b, 0xec, 0x98, 0xcc, 0x4d, 0x3e, 0xc0, 0x96, 0x27, 0xe6, 0x75, 0xfc, 0xdf, 0x37, 0xc0, 0x1e, 0x27, 0xe0, 0xf6, 0xc2, 0xbd, 0xbc, 0x3d, 0x9b, 0x39, 0xdc, 0xe2}, + dt2: fp.Elt{0xd8, 0x29, 0xa7, 0x39, 0xe3, 0x9f, 0x2f, 0x0e, 0x4b, 0x24, 0x21, 0x70, 0xef, 0xfd, 0x91, 0xea, 0xbf, 0xe1, 0x72, 0x90, 0xcc, 0xc9, 0x84, 0x0e, 0xad, 0xd5, 0xe6, 0xbb, 0xc5, 0x99, 0x7f, 0xa4, 0xf0, 0x2e, 0xcc, 0x95, 0x64, 0x27, 0x19, 0xd8, 0x4c, 0x27, 0x0d, 0xff, 0xb6, 0x29, 0xe2, 0x6c, 0xfa, 0xbb, 0x4d, 0x9c, 0xbb, 0xaf, 0xa5, 0xec}, + }, + { /* 41P*/ + addYX: fp.Elt{0xd6, 0x33, 0x3f, 0x9f, 0xcf, 0xfd, 0x4c, 0xd1, 0xfe, 0xe5, 0xeb, 0x64, 0x27, 0xae, 0x7a, 0xa2, 0x82, 0x50, 0x6d, 0xaa, 0xe3, 0x5d, 0xe2, 0x48, 0x60, 0xb3, 0x76, 0x04, 0xd9, 0x19, 0xa7, 0xa1, 0x73, 0x8d, 0x38, 0xa9, 0xaf, 0x45, 0xb5, 0xb2, 0x62, 0x9b, 0xf1, 0x35, 0x7b, 0x84, 0x66, 0xeb, 0x06, 0xef, 0xf1, 0xb2, 0x2d, 0x6a, 0x61, 0x15}, + subYX: fp.Elt{0x86, 0x50, 0x42, 0xf7, 0xda, 0x59, 0xb2, 0xcf, 0x0d, 0x3d, 0xee, 0x8e, 0x53, 0x5d, 0xf7, 0x9e, 0x6a, 0x26, 0x2d, 0xc7, 0x8c, 0x8e, 0x18, 0x50, 0x6d, 0xb7, 0x51, 0x4c, 0xa7, 0x52, 0x6e, 0x0e, 0x0a, 0x16, 0x74, 0xb2, 0x81, 0x8b, 0x56, 0x27, 0x22, 0x84, 0xf4, 0x56, 0xc5, 0x06, 0xe1, 0x8b, 0xca, 0x2d, 0xdb, 0x9a, 0xf6, 0x10, 0x9c, 0x51}, + dt2: fp.Elt{0x1f, 0x16, 0xa2, 0x78, 0x96, 0x1b, 0x85, 0x9c, 0x76, 0x49, 0xd4, 0x0f, 0xac, 0xb0, 0xf4, 0xd0, 0x06, 0x2c, 0x7e, 0x6d, 0x6e, 0x8e, 0xc7, 0x9f, 0x18, 0xad, 0xfc, 0x88, 0x0c, 0x0c, 0x09, 0x05, 0x05, 0xa0, 0x79, 0x72, 0x32, 0x72, 0x87, 0x0f, 0x49, 0x87, 0x0c, 0xb4, 0x12, 0xc2, 0x09, 0xf8, 0x9f, 0x30, 0x72, 0xa9, 0x47, 0x13, 0x93, 0x49}, + }, + { /* 43P*/ + addYX: fp.Elt{0xcc, 0xb1, 0x4c, 0xd3, 0xc0, 0x9e, 0x9e, 0x4d, 0x6d, 0x28, 0x0b, 0xa5, 0x94, 0xa7, 0x2e, 0xc2, 0xc7, 0xaf, 0x29, 0x73, 0xc9, 0x68, 0xea, 0x0f, 0x34, 0x37, 0x8d, 0x96, 0x8f, 0x3a, 0x3d, 0x73, 0x1e, 0x6d, 0x9f, 0xcf, 0x8d, 0x83, 0xb5, 0x71, 0xb9, 0xe1, 0x4b, 0x67, 0x71, 0xea, 0xcf, 0x56, 0xe5, 0xeb, 0x72, 0x15, 0x2f, 0x9e, 0xa8, 0xaa}, + subYX: fp.Elt{0xf4, 0x3e, 0x85, 0x1c, 0x1a, 0xef, 0x50, 0xd1, 0xb4, 0x20, 0xb2, 0x60, 0x05, 0x98, 0xfe, 0x47, 0x3b, 0xc1, 0x76, 0xca, 0x2c, 0x4e, 0x5a, 0x42, 0xa3, 0xf7, 0x20, 0xaa, 0x57, 0x39, 0xee, 0x34, 0x1f, 0xe1, 0x68, 0xd3, 0x7e, 0x06, 0xc4, 0x6c, 0xc7, 0x76, 0x2b, 0xe4, 0x1c, 0x48, 0x44, 0xe6, 0xe5, 0x44, 0x24, 0x8d, 0xb3, 0xb6, 0x88, 0x32}, + dt2: fp.Elt{0x18, 0xa7, 0xba, 0xd0, 0x44, 0x6f, 0x33, 0x31, 0x00, 0xf8, 0xf6, 0x12, 0xe3, 0xc5, 0xc7, 0xb5, 0x91, 0x9c, 0x91, 0xb5, 0x75, 0x18, 0x18, 0x8a, 0xab, 0xed, 0x24, 0x11, 0x2e, 0xce, 0x5a, 0x0f, 0x94, 0x5f, 0x2e, 0xca, 0xd3, 0x80, 0xea, 0xe5, 0x34, 0x96, 0x67, 0x8b, 0x6a, 0x26, 0x5e, 0xc8, 0x9d, 0x2c, 0x5e, 0x6c, 0xa2, 0x0c, 0xbf, 0xf0}, + }, + { /* 45P*/ + addYX: fp.Elt{0xb3, 0xbf, 0xa3, 0x85, 0xee, 0xf6, 0x58, 0x02, 0x78, 0xc4, 0x30, 0xd6, 0x57, 0x59, 0x8c, 0x88, 0x08, 0x7c, 0xbc, 0xbe, 0x0a, 0x74, 0xa9, 0xde, 0x69, 0xe7, 0x41, 0xd8, 0xbf, 0x66, 0x8d, 0x3d, 0x28, 0x00, 0x8c, 0x47, 0x65, 0x34, 0xfe, 0x86, 0x9e, 0x6a, 0xf2, 0x41, 0x6a, 0x94, 0xc4, 0x88, 0x75, 0x23, 0x0d, 0x52, 0x69, 0xee, 0x07, 0x89}, + subYX: fp.Elt{0x22, 0x3c, 0xa1, 0x70, 0x58, 0x97, 0x93, 0xbe, 0x59, 0xa8, 0x0b, 0x8a, 0x46, 0x2a, 0x38, 0x1e, 0x08, 0x6b, 0x61, 0x9f, 0xf2, 0x4a, 0x8b, 0x80, 0x68, 0x6e, 0xc8, 0x92, 0x60, 0xf3, 0xc9, 0x89, 0xb2, 0x6d, 0x63, 0xb0, 0xeb, 0x83, 0x15, 0x63, 0x0e, 0x64, 0xbb, 0xb8, 0xfe, 0xb4, 0x81, 0x90, 0x01, 0x28, 0x10, 0xb9, 0x74, 0x6e, 0xde, 0xa4}, + dt2: fp.Elt{0x1a, 0x23, 0x45, 0xa8, 0x6f, 0x4e, 0xa7, 0x4a, 0x0c, 0xeb, 0xb0, 0x43, 0xf9, 0xef, 0x99, 0x60, 0x5b, 0xdb, 0x66, 0xc0, 0x86, 0x71, 0x43, 0xb1, 0x22, 0x7b, 0x1c, 0xe7, 0x8d, 0x09, 0x1d, 0x83, 0x76, 0x9c, 0xd3, 0x5a, 0xdd, 0x42, 0xd9, 0x2f, 0x2d, 0xba, 0x7a, 0xc2, 0xd9, 0x6b, 0xd4, 0x7a, 0xf1, 0xd5, 0x5f, 0x6b, 0x85, 0xbf, 0x0b, 0xf1}, + }, + { /* 47P*/ + addYX: fp.Elt{0xb2, 0x83, 0xfa, 0x1f, 0xd2, 0xce, 0xb6, 0xf2, 0x2d, 0xea, 0x1b, 0xe5, 0x29, 0xa5, 0x72, 0xf9, 0x25, 0x48, 0x4e, 0xf2, 0x50, 0x1b, 0x39, 0xda, 0x34, 0xc5, 0x16, 0x13, 0xb4, 0x0c, 0xa1, 0x00, 0x79, 0x7a, 0xf5, 0x8b, 0xf3, 0x70, 0x14, 0xb6, 0xfc, 0x9a, 0x47, 0x68, 0x1e, 0x42, 0x70, 0x64, 0x2a, 0x84, 0x3e, 0x3d, 0x20, 0x58, 0xf9, 0x6a}, + subYX: fp.Elt{0xd9, 0xee, 0xc0, 0xc4, 0xf5, 0xc2, 0x86, 0xaf, 0x45, 0xd2, 0xd2, 0x87, 0x1b, 0x64, 0xd5, 0xe0, 0x8c, 0x44, 0x00, 0x4f, 0x43, 0x89, 0x04, 0x48, 0x4a, 0x0b, 0xca, 0x94, 0x06, 0x2f, 0x23, 0x5b, 0x6c, 0x8d, 0x44, 0x66, 0x53, 0xf5, 0x5a, 0x20, 0x72, 0x28, 0x58, 0x84, 0xcc, 0x73, 0x22, 0x5e, 0xd1, 0x0b, 0x56, 0x5e, 0x6a, 0xa3, 0x11, 0x91}, + dt2: fp.Elt{0x6e, 0x9f, 0x88, 0xa8, 0x68, 0x2f, 0x12, 0x37, 0x88, 0xfc, 0x92, 0x8f, 0x24, 0xeb, 0x5b, 0x2a, 0x2a, 0xd0, 0x14, 0x40, 0x4c, 0xa9, 0xa4, 0x03, 0x0c, 0x45, 0x48, 0x13, 0xe8, 0xa6, 0x37, 0xab, 0xc0, 0x06, 0x38, 0x6c, 0x96, 0x73, 0x40, 0x6c, 0xc6, 0xea, 0x56, 0xc6, 0xe9, 0x1a, 0x69, 0xeb, 0x7a, 0xd1, 0x33, 0x69, 0x58, 0x2b, 0xea, 0x2f}, + }, + { /* 49P*/ + addYX: fp.Elt{0x58, 0xa8, 0x05, 0x41, 0x00, 0x9d, 0xaa, 0xd9, 0x98, 0xcf, 0xb9, 0x41, 0xb5, 0x4a, 0x8d, 0xe2, 0xe7, 0xc0, 0x72, 0xef, 0xc8, 0x28, 0x6b, 0x68, 0x9d, 0xc9, 0xdf, 0x05, 0x8b, 0xd0, 0x04, 0x74, 0x79, 0x45, 0x52, 0x05, 0xa3, 0x6e, 0x35, 0x3a, 0xe3, 0xef, 0xb2, 0xdc, 0x08, 0x6f, 0x4e, 0x76, 0x85, 0x67, 0xba, 0x23, 0x8f, 0xdd, 0xaf, 0x09}, + subYX: fp.Elt{0xb4, 0x38, 0xc8, 0xff, 0x4f, 0x65, 0x2a, 0x7e, 0xad, 0xb1, 0xc6, 0xb9, 0x3d, 0xd6, 0xf7, 0x14, 0xcf, 0xf6, 0x98, 0x75, 0xbb, 0x47, 0x83, 0x90, 0xe7, 0xe1, 0xf6, 0x14, 0x99, 0x7e, 0xfa, 0xe4, 0x77, 0x24, 0xe3, 0xe7, 0xf0, 0x1e, 0xdb, 0x27, 0x4e, 0x16, 0x04, 0xf2, 0x08, 0x52, 0xfc, 0xec, 0x55, 0xdb, 0x2e, 0x67, 0xe1, 0x94, 0x32, 0x89}, + dt2: fp.Elt{0x00, 0xad, 0x03, 0x35, 0x1a, 0xb1, 0x88, 0xf0, 0xc9, 0x11, 0xe4, 0x12, 0x52, 0x61, 0xfd, 0x8a, 0x1b, 0x6a, 0x0a, 0x4c, 0x42, 0x46, 0x22, 0x0e, 0xa5, 0xf9, 0xe2, 0x50, 0xf2, 0xb2, 0x1f, 0x20, 0x78, 0x10, 0xf6, 0xbf, 0x7f, 0x0c, 0x9c, 0xad, 0x40, 0x8b, 0x82, 0xd4, 0xba, 0x69, 0x09, 0xac, 0x4b, 0x6d, 0xc4, 0x49, 0x17, 0x81, 0x57, 0x3b}, + }, + { /* 51P*/ + addYX: fp.Elt{0x0d, 0xfe, 0xb4, 0x35, 0x11, 0xbd, 0x1d, 0x6b, 0xc2, 0xc5, 0x3b, 0xd2, 0x23, 0x2c, 0x72, 0xe3, 0x48, 0xb1, 0x48, 0x73, 0xfb, 0xa3, 0x21, 0x6e, 0xc0, 0x09, 0x69, 0xac, 0xe1, 0x60, 0xbc, 0x24, 0x03, 0x99, 0x63, 0x0a, 0x00, 0xf0, 0x75, 0xf6, 0x92, 0xc5, 0xd6, 0xdb, 0x51, 0xd4, 0x7d, 0xe6, 0xf4, 0x11, 0x79, 0xd7, 0xc3, 0xaf, 0x48, 0xd0}, + subYX: fp.Elt{0xf4, 0x4f, 0xaf, 0x31, 0xe3, 0x10, 0x89, 0x95, 0xf0, 0x8a, 0xf6, 0x31, 0x9f, 0x48, 0x02, 0xba, 0x42, 0x2b, 0x3c, 0x22, 0x8b, 0xcc, 0x12, 0x98, 0x6e, 0x7a, 0x64, 0x3a, 0xc4, 0xca, 0x32, 0x2a, 0x72, 0xf8, 0x2c, 0xcf, 0x78, 0x5e, 0x7a, 0x75, 0x6e, 0x72, 0x46, 0x48, 0x62, 0x28, 0xac, 0x58, 0x1a, 0xc6, 0x59, 0x88, 0x2a, 0x44, 0x9e, 0x83}, + dt2: fp.Elt{0xb3, 0xde, 0x36, 0xfd, 0xeb, 0x1b, 0xd4, 0x24, 0x1b, 0x08, 0x8c, 0xfe, 0xa9, 0x41, 0xa1, 0x64, 0xf2, 0x6d, 0xdb, 0xf9, 0x94, 0xae, 0x86, 0x71, 0xab, 0x10, 0xbf, 0xa3, 0xb2, 0xa0, 0xdf, 0x10, 0x8c, 0x74, 0xce, 0xb3, 0xfc, 0xdb, 0xba, 0x15, 0xf6, 0x91, 0x7a, 0x9c, 0x36, 0x1e, 0x45, 0x07, 0x3c, 0xec, 0x1a, 0x61, 0x26, 0x93, 0xe3, 0x50}, + }, + { /* 53P*/ + addYX: fp.Elt{0xc5, 0x50, 0xc5, 0x83, 0xb0, 0xbd, 0xd9, 0xf6, 0x6d, 0x15, 0x5e, 0xc1, 0x1a, 0x33, 0xa0, 0xce, 0x13, 0x70, 0x3b, 0xe1, 0x31, 0xc6, 0xc4, 0x02, 0xec, 0x8c, 0xd5, 0x9c, 0x97, 0xd3, 0x12, 0xc4, 0xa2, 0xf9, 0xd5, 0xfb, 0x22, 0x69, 0x94, 0x09, 0x2f, 0x59, 0xce, 0xdb, 0xf2, 0xf2, 0x00, 0xe0, 0xa9, 0x08, 0x44, 0x2e, 0x8b, 0x6b, 0xf5, 0xb3}, + subYX: fp.Elt{0x90, 0xdd, 0xec, 0xa2, 0x65, 0xb7, 0x61, 0xbc, 0xaa, 0x70, 0xa2, 0x15, 0xd8, 0xb0, 0xf8, 0x8e, 0x23, 0x3d, 0x9f, 0x46, 0xa3, 0x29, 0x20, 0xd1, 0xa1, 0x15, 0x81, 0xc6, 0xb6, 0xde, 0xbe, 0x60, 0x63, 0x24, 0xac, 0x15, 0xfb, 0xeb, 0xd3, 0xea, 0x57, 0x13, 0x86, 0x38, 0x1e, 0x22, 0xf4, 0x8c, 0x5d, 0xaf, 0x1b, 0x27, 0x21, 0x4f, 0xa3, 0x63}, + dt2: fp.Elt{0x07, 0x15, 0x87, 0xc4, 0xfd, 0xa1, 0x97, 0x7a, 0x07, 0x1f, 0x56, 0xcc, 0xe3, 0x6a, 0x01, 0x90, 0xce, 0xf9, 0xfa, 0x50, 0xb2, 0xe0, 0x87, 0x8b, 0x6c, 0x63, 0x6c, 0xf6, 0x2a, 0x09, 0xef, 0xef, 0xd2, 0x31, 0x40, 0x25, 0xf6, 0x84, 0xcb, 0xe0, 0xc4, 0x23, 0xc1, 0xcb, 0xe2, 0x02, 0x83, 0x2d, 0xed, 0x74, 0x74, 0x8b, 0xf8, 0x7c, 0x81, 0x18}, + }, + { /* 55P*/ + addYX: fp.Elt{0x9e, 0xe5, 0x59, 0x95, 0x63, 0x2e, 0xac, 0x8b, 0x03, 0x3c, 0xc1, 0x8e, 0xe1, 0x5b, 0x56, 0x3c, 0x16, 0x41, 0xe4, 0xc2, 0x60, 0x0c, 0x6d, 0x65, 0x9f, 0xfc, 0x27, 0x68, 0x43, 0x44, 0x05, 0x12, 0x6c, 0xda, 0x04, 0xef, 0xcf, 0xcf, 0xdc, 0x0a, 0x1a, 0x7f, 0x12, 0xd3, 0xeb, 0x02, 0xb6, 0x04, 0xca, 0xd6, 0xcb, 0xf0, 0x22, 0xba, 0x35, 0x6d}, + subYX: fp.Elt{0x09, 0x6d, 0xf9, 0x64, 0x4c, 0xe6, 0x41, 0xff, 0x01, 0x4d, 0xce, 0x1e, 0xfa, 0x38, 0xa2, 0x25, 0x62, 0xff, 0x03, 0x39, 0x18, 0x91, 0xbb, 0x9d, 0xce, 0x02, 0xf0, 0xf1, 0x3c, 0x55, 0x18, 0xa9, 0xab, 0x4d, 0xd2, 0x35, 0xfd, 0x8d, 0xa9, 0xb2, 0xad, 0xb7, 0x06, 0x6e, 0xc6, 0x69, 0x49, 0xd6, 0x98, 0x98, 0x0b, 0x22, 0x81, 0x6b, 0xbd, 0xa0}, + dt2: fp.Elt{0x22, 0xf4, 0x85, 0x5d, 0x2b, 0xf1, 0x55, 0xa5, 0xd6, 0x27, 0x86, 0x57, 0x12, 0x1f, 0x16, 0x0a, 0x5a, 0x9b, 0xf2, 0x38, 0xb6, 0x28, 0xd8, 0x99, 0x0c, 0x89, 0x1d, 0x7f, 0xca, 0x21, 0x17, 0x1a, 0x0b, 0x02, 0x5f, 0x77, 0x2f, 0x73, 0x30, 0x7c, 0xc8, 0xd7, 0x2b, 0xcc, 0xe7, 0xf3, 0x21, 0xac, 0x53, 0xa7, 0x11, 0x5d, 0xd8, 0x1d, 0x9b, 0xf5}, + }, + { /* 57P*/ + addYX: fp.Elt{0x94, 0x63, 0x5d, 0xef, 0xfd, 0x6d, 0x25, 0x4e, 0x6d, 0x29, 0x03, 0xed, 0x24, 0x28, 0x27, 0x57, 0x47, 0x3e, 0x6a, 0x1a, 0xfe, 0x37, 0xee, 0x5f, 0x83, 0x29, 0x14, 0xfd, 0x78, 0x25, 0x8a, 0xe1, 0x02, 0x38, 0xd8, 0xca, 0x65, 0x55, 0x40, 0x7d, 0x48, 0x2c, 0x7c, 0x7e, 0x60, 0xb6, 0x0c, 0x6d, 0xf7, 0xe8, 0xb3, 0x62, 0x53, 0xd6, 0x9c, 0x2b}, + subYX: fp.Elt{0x47, 0x25, 0x70, 0x62, 0xf5, 0x65, 0x93, 0x62, 0x08, 0xac, 0x59, 0x66, 0xdb, 0x08, 0xd9, 0x1a, 0x19, 0xaf, 0xf4, 0xef, 0x02, 0xa2, 0x78, 0xa9, 0x55, 0x1c, 0xfa, 0x08, 0x11, 0xcb, 0xa3, 0x71, 0x74, 0xb1, 0x62, 0xe7, 0xc7, 0xf3, 0x5a, 0xb5, 0x8b, 0xd4, 0xf6, 0x10, 0x57, 0x79, 0x72, 0x2f, 0x13, 0x86, 0x7b, 0x44, 0x5f, 0x48, 0xfd, 0x88}, + dt2: fp.Elt{0x10, 0x02, 0xcd, 0x05, 0x9a, 0xc3, 0x32, 0x6d, 0x10, 0x3a, 0x74, 0xba, 0x06, 0xc4, 0x3b, 0x34, 0xbc, 0x36, 0xed, 0xa3, 0xba, 0x9a, 0xdb, 0x6d, 0xd4, 0x69, 0x99, 0x97, 0xd0, 0xe4, 0xdd, 0xf5, 0xd4, 0x7c, 0xd3, 0x4e, 0xab, 0xd1, 0x3b, 0xbb, 0xe9, 0xc7, 0x6a, 0x94, 0x25, 0x61, 0xf0, 0x06, 0xc5, 0x12, 0xa8, 0x86, 0xe5, 0x35, 0x46, 0xeb}, + }, + { /* 59P*/ + addYX: fp.Elt{0x9e, 0x95, 0x11, 0xc6, 0xc7, 0xe8, 0xee, 0x5a, 0x26, 0xa0, 0x72, 0x72, 0x59, 0x91, 0x59, 0x16, 0x49, 0x99, 0x7e, 0xbb, 0xd7, 0x15, 0xb4, 0xf2, 0x40, 0xf9, 0x5a, 0x4d, 0xc8, 0xa0, 0xe2, 0x34, 0x7b, 0x34, 0xf3, 0x99, 0xbf, 0xa9, 0xf3, 0x79, 0xc1, 0x1a, 0x0c, 0xf4, 0x86, 0x74, 0x4e, 0xcb, 0xbc, 0x90, 0xad, 0xb6, 0x51, 0x6d, 0xaa, 0x33}, + subYX: fp.Elt{0x9f, 0xd1, 0xc5, 0xa2, 0x6c, 0x24, 0x88, 0x15, 0x71, 0x68, 0xf6, 0x07, 0x45, 0x02, 0xc4, 0x73, 0x7e, 0x75, 0x87, 0xca, 0x7c, 0xf0, 0x92, 0x00, 0x75, 0xd6, 0x5a, 0xdd, 0xe0, 0x64, 0x16, 0x9d, 0x62, 0x80, 0x33, 0x9f, 0xf4, 0x8e, 0x1a, 0x15, 0x1c, 0xd3, 0x0f, 0x4d, 0x4f, 0x62, 0x2d, 0xd7, 0xa5, 0x77, 0xe3, 0xea, 0xf0, 0xfb, 0x1a, 0xdb}, + dt2: fp.Elt{0x6a, 0xa2, 0xb1, 0xaa, 0xfb, 0x5a, 0x32, 0x4e, 0xff, 0x47, 0x06, 0xd5, 0x9a, 0x4f, 0xce, 0x83, 0x5b, 0x82, 0x34, 0x3e, 0x47, 0xb8, 0xf8, 0xe9, 0x7c, 0x67, 0x69, 0x8d, 0x9c, 0xb7, 0xde, 0x57, 0xf4, 0x88, 0x41, 0x56, 0x0c, 0x87, 0x1e, 0xc9, 0x2f, 0x54, 0xbf, 0x5c, 0x68, 0x2c, 0xd9, 0xc4, 0xef, 0x53, 0x73, 0x1e, 0xa6, 0x38, 0x02, 0x10}, + }, + { /* 61P*/ + addYX: fp.Elt{0x08, 0x80, 0x4a, 0xc9, 0xb7, 0xa8, 0x88, 0xd9, 0xfc, 0x6a, 0xc0, 0x3e, 0xc2, 0x33, 0x4d, 0x2b, 0x2a, 0xa3, 0x6d, 0x72, 0x3e, 0xdc, 0x34, 0x68, 0x08, 0xbf, 0x27, 0xef, 0xf4, 0xff, 0xe2, 0x0c, 0x31, 0x0c, 0xa2, 0x0a, 0x1f, 0x65, 0xc1, 0x4c, 0x61, 0xd3, 0x1b, 0xbc, 0x25, 0xb1, 0xd0, 0xd4, 0x89, 0xb2, 0x53, 0xfb, 0x43, 0xa5, 0xaf, 0x04}, + subYX: fp.Elt{0xe3, 0xe1, 0x37, 0xad, 0x58, 0xa9, 0x55, 0x81, 0xee, 0x64, 0x21, 0xb9, 0xf5, 0x4c, 0x35, 0xea, 0x4a, 0xd3, 0x26, 0xaa, 0x90, 0xd4, 0x60, 0x46, 0x09, 0x4b, 0x4a, 0x62, 0xf9, 0xcd, 0xe1, 0xee, 0xbb, 0xc2, 0x09, 0x0b, 0xb0, 0x96, 0x8e, 0x43, 0x77, 0xaf, 0x25, 0x20, 0x5e, 0x47, 0xe4, 0x1d, 0x50, 0x69, 0x74, 0x08, 0xd7, 0xb9, 0x90, 0x13}, + dt2: fp.Elt{0x51, 0x91, 0x95, 0x64, 0x03, 0x16, 0xfd, 0x6e, 0x26, 0x94, 0x6b, 0x61, 0xe7, 0xd9, 0xe0, 0x4a, 0x6d, 0x7c, 0xfa, 0xc0, 0xe2, 0x43, 0x23, 0x53, 0x70, 0xf5, 0x6f, 0x73, 0x8b, 0x81, 0xb0, 0x0c, 0xee, 0x2e, 0x46, 0xf2, 0x8d, 0xa6, 0xfb, 0xb5, 0x1c, 0x33, 0xbf, 0x90, 0x59, 0xc9, 0x7c, 0xb8, 0x6f, 0xad, 0x75, 0x02, 0x90, 0x8e, 0x59, 0x75}, + }, + { /* 63P*/ + addYX: fp.Elt{0x36, 0x4d, 0x77, 0x04, 0xb8, 0x7d, 0x4a, 0xd1, 0xc5, 0xbb, 0x7b, 0x50, 0x5f, 0x8d, 0x9d, 0x62, 0x0f, 0x66, 0x71, 0xec, 0x87, 0xc5, 0x80, 0x82, 0xc8, 0xf4, 0x6a, 0x94, 0x92, 0x5b, 0xb0, 0x16, 0x9b, 0xb2, 0xc9, 0x6f, 0x2b, 0x2d, 0xee, 0x95, 0x73, 0x2e, 0xc2, 0x1b, 0xc5, 0x55, 0x36, 0x86, 0x24, 0xf8, 0x20, 0x05, 0x0d, 0x93, 0xd7, 0x76}, + subYX: fp.Elt{0x7f, 0x01, 0xeb, 0x2e, 0x48, 0x4d, 0x1d, 0xf1, 0x06, 0x7e, 0x7c, 0x2a, 0x43, 0xbf, 0x28, 0xac, 0xe9, 0x58, 0x13, 0xc8, 0xbf, 0x8e, 0xc0, 0xef, 0xe8, 0x4f, 0x46, 0x8a, 0xe7, 0xc0, 0xf6, 0x0f, 0x0a, 0x03, 0x48, 0x91, 0x55, 0x39, 0x2a, 0xe3, 0xdc, 0xf6, 0x22, 0x9d, 0x4d, 0x71, 0x55, 0x68, 0x25, 0x6e, 0x95, 0x52, 0xee, 0x4c, 0xd9, 0x01}, + dt2: fp.Elt{0xac, 0x33, 0x3f, 0x7c, 0x27, 0x35, 0x15, 0x91, 0x33, 0x8d, 0xf9, 0xc4, 0xf4, 0xf3, 0x90, 0x09, 0x75, 0x69, 0x62, 0x9f, 0x61, 0x35, 0x83, 0x92, 0x04, 0xef, 0x96, 0x38, 0x80, 0x9e, 0x88, 0xb3, 0x67, 0x95, 0xbe, 0x79, 0x3c, 0x35, 0xd8, 0xdc, 0xb2, 0x3e, 0x2d, 0xe6, 0x46, 0xbe, 0x81, 0xf3, 0x32, 0x0e, 0x37, 0x23, 0x75, 0x2a, 0x3d, 0xa0}, + }, +} diff --git a/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/twist_basemult.go b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/twist_basemult.go new file mode 100644 index 0000000..f6ac5ed --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/ecc/goldilocks/twist_basemult.go @@ -0,0 +1,62 @@ +package goldilocks + +import ( + "crypto/subtle" + + mlsb "github.com/cloudflare/circl/math/mlsbset" +) + +const ( + // MLSBRecoding parameters + fxT = 448 + fxV = 2 + fxW = 3 + fx2w1 = 1 << (uint(fxW) - 1) +) + +// ScalarBaseMult returns kG where G is the generator point. +func (e twistCurve) ScalarBaseMult(k *Scalar) *twistPoint { + m, err := mlsb.New(fxT, fxV, fxW) + if err != nil { + panic(err) + } + if m.IsExtended() { + panic("not extended") + } + + var isZero int + if k.IsZero() { + isZero = 1 + } + subtle.ConstantTimeCopy(isZero, k[:], order[:]) + + minusK := *k + isEven := 1 - int(k[0]&0x1) + minusK.Neg() + subtle.ConstantTimeCopy(isEven, k[:], minusK[:]) + c, err := m.Encode(k[:]) + if err != nil { + panic(err) + } + + gP := c.Exp(groupMLSB{}) + P := gP.(*twistPoint) + P.cneg(uint(isEven)) + return P +} + +type groupMLSB struct{} + +func (e groupMLSB) ExtendedEltP() mlsb.EltP { return nil } +func (e groupMLSB) Sqr(x mlsb.EltG) { x.(*twistPoint).Double() } +func (e groupMLSB) Mul(x mlsb.EltG, y mlsb.EltP) { x.(*twistPoint).mixAddZ1(y.(*preTwistPointAffine)) } +func (e groupMLSB) Identity() mlsb.EltG { return twistCurve{}.Identity() } +func (e groupMLSB) NewEltP() mlsb.EltP { return &preTwistPointAffine{} } +func (e groupMLSB) Lookup(a mlsb.EltP, v uint, s, u int32) { + Tabj := &tabFixMult[v] + P := a.(*preTwistPointAffine) + for k := range Tabj { + P.cmov(&Tabj[k], uint(subtle.ConstantTimeEq(int32(k), u))) + } + P.cneg(int(s >> 31)) +} diff --git a/backend/vendor/github.com/cloudflare/circl/hpke/aead.go b/backend/vendor/github.com/cloudflare/circl/hpke/aead.go new file mode 100644 index 0000000..baf147b --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/hpke/aead.go @@ -0,0 +1,103 @@ +package hpke + +import ( + "crypto/cipher" + "fmt" +) + +type encdecContext struct { + // Serialized parameters + suite Suite + sharedSecret []byte + secret []byte + keyScheduleContext []byte + exporterSecret []byte + key []byte + baseNonce []byte + sequenceNumber []byte + + // Operational parameters + cipher.AEAD + nonce []byte +} + +type ( + sealContext struct{ *encdecContext } + openContext struct{ *encdecContext } +) + +// Export takes a context string exporterContext and a desired length (in +// bytes), and produces a secret derived from the internal exporter secret +// using the corresponding KDF Expand function. It panics if length is +// greater than 255*N bytes, where N is the size (in bytes) of the KDF's +// output. +func (c *encdecContext) Export(exporterContext []byte, length uint) []byte { + maxLength := uint(255 * c.suite.kdfID.ExtractSize()) + if length > maxLength { + panic(fmt.Errorf("output length must be lesser than %v bytes", maxLength)) + } + return c.suite.labeledExpand(c.exporterSecret, []byte("sec"), + exporterContext, uint16(length)) +} + +func (c *encdecContext) Suite() Suite { + return c.suite +} + +func (c *encdecContext) calcNonce() []byte { + for i := range c.baseNonce { + c.nonce[i] = c.baseNonce[i] ^ c.sequenceNumber[i] + } + return c.nonce +} + +func (c *encdecContext) increment() error { + // tests whether the sequence number is all-ones, which prevents an + // overflow after the increment. + allOnes := byte(0xFF) + for i := range c.sequenceNumber { + allOnes &= c.sequenceNumber[i] + } + if allOnes == byte(0xFF) { + return ErrAEADSeqOverflows + } + + // performs an increment by 1 and verifies whether the sequence overflows. + carry := uint(1) + for i := len(c.sequenceNumber) - 1; i >= 0; i-- { + sum := uint(c.sequenceNumber[i]) + carry + carry = sum >> 8 + c.sequenceNumber[i] = byte(sum & 0xFF) + } + if carry != 0 { + return ErrAEADSeqOverflows + } + return nil +} + +func (c *sealContext) Seal(pt, aad []byte) ([]byte, error) { + ct := c.AEAD.Seal(nil, c.calcNonce(), pt, aad) + err := c.increment() + if err != nil { + for i := range ct { + ct[i] = 0 + } + return nil, err + } + return ct, nil +} + +func (c *openContext) Open(ct, aad []byte) ([]byte, error) { + pt, err := c.AEAD.Open(nil, c.calcNonce(), ct, aad) + if err != nil { + return nil, err + } + err = c.increment() + if err != nil { + for i := range pt { + pt[i] = 0 + } + return nil, err + } + return pt, nil +} diff --git a/backend/vendor/github.com/cloudflare/circl/hpke/algs.go b/backend/vendor/github.com/cloudflare/circl/hpke/algs.go new file mode 100644 index 0000000..6ae2465 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/hpke/algs.go @@ -0,0 +1,287 @@ +package hpke + +import ( + "crypto" + "crypto/aes" + "crypto/cipher" + "crypto/ecdh" + _ "crypto/sha256" // Linking sha256. + _ "crypto/sha512" // Linking sha512. + "fmt" + "hash" + "io" + + "github.com/cloudflare/circl/dh/x25519" + "github.com/cloudflare/circl/dh/x448" + "github.com/cloudflare/circl/kem" + "github.com/cloudflare/circl/kem/kyber/kyber768" + "github.com/cloudflare/circl/kem/xwing" + "golang.org/x/crypto/chacha20poly1305" + "golang.org/x/crypto/hkdf" +) + +type KEM uint16 + +//nolint:golint,stylecheck +const ( + // KEM_P256_HKDF_SHA256 is a KEM using P256 curve and HKDF with SHA-256. + KEM_P256_HKDF_SHA256 KEM = 0x10 + // KEM_P384_HKDF_SHA384 is a KEM using P384 curve and HKDF with SHA-384. + KEM_P384_HKDF_SHA384 KEM = 0x11 + // KEM_P521_HKDF_SHA512 is a KEM using P521 curve and HKDF with SHA-512. + KEM_P521_HKDF_SHA512 KEM = 0x12 + // KEM_X25519_HKDF_SHA256 is a KEM using X25519 Diffie-Hellman function + // and HKDF with SHA-256. + KEM_X25519_HKDF_SHA256 KEM = 0x20 + // KEM_X448_HKDF_SHA512 is a KEM using X448 Diffie-Hellman function and + // HKDF with SHA-512. + KEM_X448_HKDF_SHA512 KEM = 0x21 + // KEM_X25519_KYBER768_DRAFT00 is a hybrid KEM built on DHKEM(X25519, HKDF-SHA256) + // and Kyber768Draft00 + KEM_X25519_KYBER768_DRAFT00 KEM = 0x30 + // KEM_XWING is a hybrid KEM using X25519 and ML-KEM-768. + KEM_XWING KEM = 0x647a +) + +// IsValid returns true if the KEM identifier is supported by the HPKE package. +func (k KEM) IsValid() bool { + switch k { + case KEM_P256_HKDF_SHA256, + KEM_P384_HKDF_SHA384, + KEM_P521_HKDF_SHA512, + KEM_X25519_HKDF_SHA256, + KEM_X448_HKDF_SHA512, + KEM_X25519_KYBER768_DRAFT00, + KEM_XWING: + return true + default: + return false + } +} + +// Scheme returns an instance of a KEM that supports authentication. Panics if +// the KEM identifier is invalid. +func (k KEM) Scheme() kem.Scheme { + switch k { + case KEM_P256_HKDF_SHA256: + return dhkemp256hkdfsha256 + case KEM_P384_HKDF_SHA384: + return dhkemp384hkdfsha384 + case KEM_P521_HKDF_SHA512: + return dhkemp521hkdfsha512 + case KEM_X25519_HKDF_SHA256: + return dhkemx25519hkdfsha256 + case KEM_X448_HKDF_SHA512: + return dhkemx448hkdfsha512 + case KEM_X25519_KYBER768_DRAFT00: + return hybridkemX25519Kyber768 + case KEM_XWING: + return kemXwing + default: + panic(ErrInvalidKEM) + } +} + +type KDF uint16 + +//nolint:golint,stylecheck +const ( + // KDF_HKDF_SHA256 is a KDF using HKDF with SHA-256. + KDF_HKDF_SHA256 KDF = 0x01 + // KDF_HKDF_SHA384 is a KDF using HKDF with SHA-384. + KDF_HKDF_SHA384 KDF = 0x02 + // KDF_HKDF_SHA512 is a KDF using HKDF with SHA-512. + KDF_HKDF_SHA512 KDF = 0x03 +) + +func (k KDF) IsValid() bool { + switch k { + case KDF_HKDF_SHA256, + KDF_HKDF_SHA384, + KDF_HKDF_SHA512: + return true + default: + return false + } +} + +// ExtractSize returns the size (in bytes) of the pseudorandom key produced +// by KDF.Extract. +func (k KDF) ExtractSize() int { + switch k { + case KDF_HKDF_SHA256: + return crypto.SHA256.Size() + case KDF_HKDF_SHA384: + return crypto.SHA384.Size() + case KDF_HKDF_SHA512: + return crypto.SHA512.Size() + default: + panic(ErrInvalidKDF) + } +} + +// Extract derives a pseudorandom key from a high-entropy, secret input and a +// salt. The size of the output is determined by KDF.ExtractSize. +func (k KDF) Extract(secret, salt []byte) (pseudorandomKey []byte) { + return hkdf.Extract(k.hash(), secret, salt) +} + +// Expand derives a variable length pseudorandom string from a pseudorandom key +// and an information string. Panics if the pseudorandom key is less +// than N bytes, or if the output length is greater than 255*N bytes, +// where N is the size returned by KDF.Extract function. +func (k KDF) Expand(pseudorandomKey, info []byte, outputLen uint) []byte { + extractSize := k.ExtractSize() + if len(pseudorandomKey) < extractSize { + panic(fmt.Errorf("pseudorandom key must be %v bytes", extractSize)) + } + maxLength := uint(255 * extractSize) + if outputLen > maxLength { + panic(fmt.Errorf("output length must be less than %v bytes", maxLength)) + } + output := make([]byte, outputLen) + rd := hkdf.Expand(k.hash(), pseudorandomKey[:extractSize], info) + _, err := io.ReadFull(rd, output) + if err != nil { + panic(err) + } + return output +} + +func (k KDF) hash() func() hash.Hash { + switch k { + case KDF_HKDF_SHA256: + return crypto.SHA256.New + case KDF_HKDF_SHA384: + return crypto.SHA384.New + case KDF_HKDF_SHA512: + return crypto.SHA512.New + default: + panic(ErrInvalidKDF) + } +} + +type AEAD uint16 + +//nolint:golint,stylecheck +const ( + // AEAD_AES128GCM is AES-128 block cipher in Galois Counter Mode (GCM). + AEAD_AES128GCM AEAD = 0x01 + // AEAD_AES256GCM is AES-256 block cipher in Galois Counter Mode (GCM). + AEAD_AES256GCM AEAD = 0x02 + // AEAD_ChaCha20Poly1305 is ChaCha20 stream cipher and Poly1305 MAC. + AEAD_ChaCha20Poly1305 AEAD = 0x03 +) + +// New instantiates an AEAD cipher from the identifier, returns an error if the +// identifier is not known. +func (a AEAD) New(key []byte) (cipher.AEAD, error) { + switch a { + case AEAD_AES128GCM, AEAD_AES256GCM: + block, err := aes.NewCipher(key) + if err != nil { + return nil, err + } + return cipher.NewGCM(block) + case AEAD_ChaCha20Poly1305: + return chacha20poly1305.New(key) + default: + panic(ErrInvalidAEAD) + } +} + +func (a AEAD) IsValid() bool { + switch a { + case AEAD_AES128GCM, + AEAD_AES256GCM, + AEAD_ChaCha20Poly1305: + return true + default: + return false + } +} + +// KeySize returns the size in bytes of the keys used by the AEAD cipher. +func (a AEAD) KeySize() uint { + switch a { + case AEAD_AES128GCM: + return 16 + case AEAD_AES256GCM: + return 32 + case AEAD_ChaCha20Poly1305: + return chacha20poly1305.KeySize + default: + panic(ErrInvalidAEAD) + } +} + +// NonceSize returns the size in bytes of the nonce used by the AEAD cipher. +func (a AEAD) NonceSize() uint { + switch a { + case AEAD_AES128GCM, + AEAD_AES256GCM, + AEAD_ChaCha20Poly1305: + return 12 + default: + panic(ErrInvalidAEAD) + } +} + +// CipherLen returns the length of a ciphertext corresponding to a message of +// length mLen. +func (a AEAD) CipherLen(mLen uint) uint { + switch a { + case AEAD_AES128GCM, AEAD_AES256GCM, AEAD_ChaCha20Poly1305: + return mLen + 16 + default: + panic(ErrInvalidAEAD) + } +} + +var ( + dhkemp256hkdfsha256, dhkemp384hkdfsha384, dhkemp521hkdfsha512 shortKEM + dhkemx25519hkdfsha256, dhkemx448hkdfsha512 xKEM + hybridkemX25519Kyber768 hybridKEM + kemXwing genericNoAuthKEM +) + +func init() { + dhkemp256hkdfsha256.Curve = ecdh.P256() + dhkemp256hkdfsha256.dhKemBase.id = KEM_P256_HKDF_SHA256 + dhkemp256hkdfsha256.dhKemBase.name = "HPKE_KEM_P256_HKDF_SHA256" + dhkemp256hkdfsha256.dhKemBase.Hash = crypto.SHA256 + dhkemp256hkdfsha256.dhKemBase.dhKEM = dhkemp256hkdfsha256 + + dhkemp384hkdfsha384.Curve = ecdh.P384() + dhkemp384hkdfsha384.dhKemBase.id = KEM_P384_HKDF_SHA384 + dhkemp384hkdfsha384.dhKemBase.name = "HPKE_KEM_P384_HKDF_SHA384" + dhkemp384hkdfsha384.dhKemBase.Hash = crypto.SHA384 + dhkemp384hkdfsha384.dhKemBase.dhKEM = dhkemp384hkdfsha384 + + dhkemp521hkdfsha512.Curve = ecdh.P521() + dhkemp521hkdfsha512.dhKemBase.id = KEM_P521_HKDF_SHA512 + dhkemp521hkdfsha512.dhKemBase.name = "HPKE_KEM_P521_HKDF_SHA512" + dhkemp521hkdfsha512.dhKemBase.Hash = crypto.SHA512 + dhkemp521hkdfsha512.dhKemBase.dhKEM = dhkemp521hkdfsha512 + + dhkemx25519hkdfsha256.size = x25519.Size + dhkemx25519hkdfsha256.dhKemBase.id = KEM_X25519_HKDF_SHA256 + dhkemx25519hkdfsha256.dhKemBase.name = "HPKE_KEM_X25519_HKDF_SHA256" + dhkemx25519hkdfsha256.dhKemBase.Hash = crypto.SHA256 + dhkemx25519hkdfsha256.dhKemBase.dhKEM = dhkemx25519hkdfsha256 + + dhkemx448hkdfsha512.size = x448.Size + dhkemx448hkdfsha512.dhKemBase.id = KEM_X448_HKDF_SHA512 + dhkemx448hkdfsha512.dhKemBase.name = "HPKE_KEM_X448_HKDF_SHA512" + dhkemx448hkdfsha512.dhKemBase.Hash = crypto.SHA512 + dhkemx448hkdfsha512.dhKemBase.dhKEM = dhkemx448hkdfsha512 + + hybridkemX25519Kyber768.kemBase.id = KEM_X25519_KYBER768_DRAFT00 + hybridkemX25519Kyber768.kemBase.name = "HPKE_KEM_X25519_KYBER768_HKDF_SHA256" + hybridkemX25519Kyber768.kemBase.Hash = crypto.SHA256 + hybridkemX25519Kyber768.kemA = dhkemx25519hkdfsha256 + hybridkemX25519Kyber768.kemB = kyber768.Scheme() + + kemXwing.Scheme = xwing.Scheme() + kemXwing.name = "HPKE_KEM_XWING" +} diff --git a/backend/vendor/github.com/cloudflare/circl/hpke/genericnoauthkem.go b/backend/vendor/github.com/cloudflare/circl/hpke/genericnoauthkem.go new file mode 100644 index 0000000..88e1235 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/hpke/genericnoauthkem.go @@ -0,0 +1,27 @@ +package hpke + +// Shim to use generic KEM (kem.Scheme) as HPKE KEM. + +import ( + "github.com/cloudflare/circl/internal/sha3" + "github.com/cloudflare/circl/kem" +) + +// genericNoAuthKEM wraps a generic KEM (kem.Scheme) to be used as a HPKE KEM. +type genericNoAuthKEM struct { + kem.Scheme + name string +} + +func (h genericNoAuthKEM) Name() string { return h.name } + +// HPKE requires DeriveKeyPair() to take any seed larger than the private key +// size, whereas typical KEMs expect a specific seed size. We'll just use +// SHAKE256 to hash it to the right size as in X-Wing. +func (h genericNoAuthKEM) DeriveKeyPair(seed []byte) (kem.PublicKey, kem.PrivateKey) { + seed2 := make([]byte, h.Scheme.SeedSize()) + hh := sha3.NewShake256() + _, _ = hh.Write(seed) + _, _ = hh.Read(seed2) + return h.Scheme.DeriveKeyPair(seed2) +} diff --git a/backend/vendor/github.com/cloudflare/circl/hpke/hpke.go b/backend/vendor/github.com/cloudflare/circl/hpke/hpke.go new file mode 100644 index 0000000..ac70dc7 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/hpke/hpke.go @@ -0,0 +1,283 @@ +// Package hpke implements the Hybrid Public Key Encryption (HPKE) standard +// specified by draft-irtf-cfrg-hpke-07. +// +// HPKE works for any combination of a public-key encapsulation mechanism +// (KEM), a key derivation function (KDF), and an authenticated encryption +// scheme with additional data (AEAD). +// +// Specification in +// https://datatracker.ietf.org/doc/draft-irtf-cfrg-hpke +// +// BUG(cjpatton): This package does not implement the "Export-Only" mode of the +// HPKE context. In particular, it does not recognize the AEAD codepoint +// reserved for this purpose (0xFFFF). +package hpke + +import ( + "crypto/rand" + "encoding" + "errors" + "io" + + "github.com/cloudflare/circl/kem" +) + +const versionLabel = "HPKE-v1" + +// Context defines the capabilities of an HPKE context. +type Context interface { + encoding.BinaryMarshaler + // Export takes a context string exporterContext and a desired length (in + // bytes), and produces a secret derived from the internal exporter secret + // using the corresponding KDF Expand function. It panics if length is + // greater than 255*N bytes, where N is the size (in bytes) of the KDF's + // output. + Export(exporterContext []byte, length uint) []byte + // Suite returns the cipher suite corresponding to this context. + Suite() Suite +} + +// Sealer encrypts a plaintext using an AEAD encryption. +type Sealer interface { + Context + // Seal takes a plaintext and associated data to produce a ciphertext. + // The nonce is handled by the Sealer and incremented after each call. + Seal(pt, aad []byte) (ct []byte, err error) +} + +// Opener decrypts a ciphertext using an AEAD encryption. +type Opener interface { + Context + // Open takes a ciphertext and associated data to recover, if successful, + // the plaintext. The nonce is handled by the Opener and incremented after + // each call. + Open(ct, aad []byte) (pt []byte, err error) +} + +// modeID represents an HPKE variant. +type modeID = uint8 + +const ( + // modeBase to enable encryption to the holder of a given KEM private key. + modeBase modeID = 0x00 + // modePSK extends the base mode by allowing the Receiver to authenticate + // that the sender possessed a given pre-shared key (PSK). + modePSK modeID = 0x01 + // modeAuth extends the base mode by allowing the Receiver to authenticate + // that the sender possessed a given KEM private key. + modeAuth modeID = 0x02 + // modeAuthPSK provides a combination of the PSK and Auth modes. + modeAuthPSK modeID = 0x03 +) + +// Suite is an HPKE cipher suite consisting of a KEM, KDF, and AEAD algorithm. +type Suite struct { + kemID KEM + kdfID KDF + aeadID AEAD +} + +// NewSuite builds a Suite from a specified set of algorithms. Panics +// if an algorithm identifier is not valid. +func NewSuite(kemID KEM, kdfID KDF, aeadID AEAD) Suite { + s := Suite{kemID, kdfID, aeadID} + if !s.isValid() { + panic(ErrInvalidHPKESuite) + } + return s +} + +type state struct { + Suite + modeID modeID + skS kem.PrivateKey + pkS kem.PublicKey + psk []byte + pskID []byte + info []byte +} + +// Sender performs hybrid public-key encryption. +type Sender struct { + state + pkR kem.PublicKey +} + +// NewSender creates a Sender with knowledge of the receiver's public-key. +func (suite Suite) NewSender(pkR kem.PublicKey, info []byte) (*Sender, error) { + return &Sender{ + state: state{Suite: suite, info: info}, + pkR: pkR, + }, nil +} + +// Setup generates a new HPKE context used for Base Mode encryption. +// Returns the Sealer and corresponding encapsulated key. +func (s *Sender) Setup(rnd io.Reader) (enc []byte, seal Sealer, err error) { + s.modeID = modeBase + return s.allSetup(rnd) +} + +// SetupAuth generates a new HPKE context used for Auth Mode encryption. +// Returns the Sealer and corresponding encapsulated key. +func (s *Sender) SetupAuth(rnd io.Reader, skS kem.PrivateKey) ( + enc []byte, seal Sealer, err error, +) { + s.modeID = modeAuth + s.state.skS = skS + return s.allSetup(rnd) +} + +// SetupPSK generates a new HPKE context used for PSK Mode encryption. +// Returns the Sealer and corresponding encapsulated key. +func (s *Sender) SetupPSK(rnd io.Reader, psk, pskID []byte) ( + enc []byte, seal Sealer, err error, +) { + s.modeID = modePSK + s.state.psk = psk + s.state.pskID = pskID + return s.allSetup(rnd) +} + +// SetupAuthPSK generates a new HPKE context used for Auth-PSK Mode encryption. +// Returns the Sealer and corresponding encapsulated key. +func (s *Sender) SetupAuthPSK(rnd io.Reader, skS kem.PrivateKey, psk, pskID []byte) ( + enc []byte, seal Sealer, err error, +) { + s.modeID = modeAuthPSK + s.state.skS = skS + s.state.psk = psk + s.state.pskID = pskID + return s.allSetup(rnd) +} + +// Receiver performs hybrid public-key decryption. +type Receiver struct { + state + skR kem.PrivateKey + enc []byte +} + +// NewReceiver creates a Receiver with knowledge of a private key. +func (suite Suite) NewReceiver(skR kem.PrivateKey, info []byte) ( + *Receiver, error, +) { + return &Receiver{state: state{Suite: suite, info: info}, skR: skR}, nil +} + +// Setup generates a new HPKE context used for Base Mode encryption. +// Setup takes an encapsulated key and returns an Opener. +func (r *Receiver) Setup(enc []byte) (Opener, error) { + r.modeID = modeBase + r.enc = enc + return r.allSetup() +} + +// SetupAuth generates a new HPKE context used for Auth Mode encryption. +// SetupAuth takes an encapsulated key and a public key, and returns an Opener. +func (r *Receiver) SetupAuth(enc []byte, pkS kem.PublicKey) (Opener, error) { + r.modeID = modeAuth + r.enc = enc + r.state.pkS = pkS + return r.allSetup() +} + +// SetupPSK generates a new HPKE context used for PSK Mode encryption. +// SetupPSK takes an encapsulated key, and a pre-shared key; and returns an +// Opener. +func (r *Receiver) SetupPSK(enc, psk, pskID []byte) (Opener, error) { + r.modeID = modePSK + r.enc = enc + r.state.psk = psk + r.state.pskID = pskID + return r.allSetup() +} + +// SetupAuthPSK generates a new HPKE context used for Auth-PSK Mode encryption. +// SetupAuthPSK takes an encapsulated key, a public key, and a pre-shared key; +// and returns an Opener. +func (r *Receiver) SetupAuthPSK( + enc, psk, pskID []byte, pkS kem.PublicKey, +) (Opener, error) { + r.modeID = modeAuthPSK + r.enc = enc + r.state.psk = psk + r.state.pskID = pskID + r.state.pkS = pkS + return r.allSetup() +} + +func (s *Sender) allSetup(rnd io.Reader) ([]byte, Sealer, error) { + scheme := s.kemID.Scheme() + + if rnd == nil { + rnd = rand.Reader + } + seed := make([]byte, scheme.EncapsulationSeedSize()) + _, err := io.ReadFull(rnd, seed) + if err != nil { + return nil, nil, err + } + + var enc, ss []byte + switch s.modeID { + case modeBase, modePSK: + enc, ss, err = scheme.EncapsulateDeterministically(s.pkR, seed) + case modeAuth, modeAuthPSK: + authScheme, ok := scheme.(kem.AuthScheme) + if !ok { + return nil, nil, ErrInvalidAuthKEM + } + + enc, ss, err = authScheme.AuthEncapsulateDeterministically(s.pkR, s.skS, seed) + } + if err != nil { + return nil, nil, err + } + + ctx, err := s.keySchedule(ss, s.info, s.psk, s.pskID) + if err != nil { + return nil, nil, err + } + + return enc, &sealContext{ctx}, nil +} + +func (r *Receiver) allSetup() (Opener, error) { + var err error + var ss []byte + scheme := r.kemID.Scheme() + switch r.modeID { + case modeBase, modePSK: + ss, err = scheme.Decapsulate(r.skR, r.enc) + case modeAuth, modeAuthPSK: + authScheme, ok := scheme.(kem.AuthScheme) + if !ok { + return nil, ErrInvalidAuthKEM + } + + ss, err = authScheme.AuthDecapsulate(r.skR, r.enc, r.pkS) + } + if err != nil { + return nil, err + } + + ctx, err := r.keySchedule(ss, r.info, r.psk, r.pskID) + if err != nil { + return nil, err + } + return &openContext{ctx}, nil +} + +var ( + ErrInvalidHPKESuite = errors.New("hpke: invalid HPKE suite") + ErrInvalidKDF = errors.New("hpke: invalid KDF identifier") + ErrInvalidKEM = errors.New("hpke: invalid KEM identifier") + ErrInvalidAuthKEM = errors.New("hpke: KEM does not support Auth mode") + ErrInvalidAEAD = errors.New("hpke: invalid AEAD identifier") + ErrInvalidKEMPublicKey = errors.New("hpke: invalid KEM public key") + ErrInvalidKEMPrivateKey = errors.New("hpke: invalid KEM private key") + ErrInvalidKEMSharedSecret = errors.New("hpke: invalid KEM shared secret") + ErrInvalidKEMDeriveKey = errors.New("hpke: too many tries to derive KEM key") + ErrAEADSeqOverflows = errors.New("hpke: AEAD sequence number overflows") +) diff --git a/backend/vendor/github.com/cloudflare/circl/hpke/hybridkem.go b/backend/vendor/github.com/cloudflare/circl/hpke/hybridkem.go new file mode 100644 index 0000000..74e1ea6 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/hpke/hybridkem.go @@ -0,0 +1,232 @@ +package hpke + +// This file implements a hybrid KEM for HPKE using a simple concatenation +// combiner. +// +// WARNING It is not safe to combine arbitrary KEMs using this combiner. +// See the draft specification for more details: +// https://bwesterb.github.io/draft-westerbaan-cfrg-hpke-xyber768d00/draft-westerbaan-cfrg-hpke-xyber768d00.html#name-security-considerations + +import ( + "crypto/rand" + + "github.com/cloudflare/circl/kem" +) + +type hybridKEM struct { + kemBase + kemA kem.Scheme + kemB kem.Scheme +} + +func (h hybridKEM) PrivateKeySize() int { return h.kemA.PrivateKeySize() + h.kemB.PrivateKeySize() } +func (h hybridKEM) SeedSize() int { return 32 } +func (h hybridKEM) CiphertextSize() int { return h.kemA.CiphertextSize() + h.kemB.CiphertextSize() } +func (h hybridKEM) PublicKeySize() int { return h.kemA.PublicKeySize() + h.kemB.PublicKeySize() } +func (h hybridKEM) EncapsulationSeedSize() int { + return h.kemA.EncapsulationSeedSize() + h.kemB.EncapsulationSeedSize() +} +func (h hybridKEM) SharedKeySize() int { return h.kemA.SharedKeySize() + h.kemB.SharedKeySize() } +func (h hybridKEM) Name() string { return h.name } + +func (h hybridKEM) AuthDecapsulate(skR kem.PrivateKey, + ct []byte, + pkS kem.PublicKey, +) ([]byte, error) { + panic("AuthDecapsulate is not supported for this KEM") +} + +func (h hybridKEM) AuthEncapsulate(pkr kem.PublicKey, sks kem.PrivateKey) ( + ct []byte, ss []byte, err error, +) { + panic("AuthEncapsulate is not supported for this KEM") +} + +func (h hybridKEM) AuthEncapsulateDeterministically(pkr kem.PublicKey, sks kem.PrivateKey, seed []byte) (ct, ss []byte, err error) { + panic("AuthEncapsulateDeterministically is not supported for this KEM") +} + +func (h hybridKEM) Encapsulate(pkr kem.PublicKey) ( + ct []byte, ss []byte, err error, +) { + panic("Encapsulate is not implemented") +} + +func (h hybridKEM) Decapsulate(skr kem.PrivateKey, ct []byte) ([]byte, error) { + hybridSk := skr.(*hybridKEMPrivKey) + ssA, err := h.kemA.Decapsulate(hybridSk.privA, ct[0:h.kemA.CiphertextSize()]) + if err != nil { + return nil, err + } + ssB, err := h.kemB.Decapsulate(hybridSk.privB, ct[h.kemA.CiphertextSize():]) + if err != nil { + return nil, err + } + + ss := append(ssA, ssB...) + + return ss, nil +} + +func (h hybridKEM) EncapsulateDeterministically( + pkr kem.PublicKey, seed []byte, +) (ct, ss []byte, err error) { + hybridPk := pkr.(*hybridKEMPubKey) + encA, ssA, err := h.kemA.EncapsulateDeterministically(hybridPk.pubA, seed[0:h.kemA.EncapsulationSeedSize()]) + if err != nil { + return nil, nil, err + } + encB, ssB, err := h.kemB.EncapsulateDeterministically(hybridPk.pubB, seed[h.kemA.EncapsulationSeedSize():]) + if err != nil { + return nil, nil, err + } + + ct = append(encA, encB...) + ss = append(ssA, ssB...) + + return ct, ss, nil +} + +type hybridKEMPrivKey struct { + scheme kem.Scheme + privA kem.PrivateKey + privB kem.PrivateKey +} + +func (k *hybridKEMPrivKey) Scheme() kem.Scheme { + return k.scheme +} + +func (k *hybridKEMPrivKey) MarshalBinary() ([]byte, error) { + skA, err := k.privA.MarshalBinary() + if err != nil { + return nil, err + } + skB, err := k.privB.MarshalBinary() + if err != nil { + return nil, err + } + return append(skA, skB...), nil +} + +func (k *hybridKEMPrivKey) Equal(sk kem.PrivateKey) bool { + k1, ok := sk.(*hybridKEMPrivKey) + return ok && + k.privA.Equal(k1.privA) && + k.privB.Equal(k1.privB) +} + +func (k *hybridKEMPrivKey) Public() kem.PublicKey { + return &hybridKEMPubKey{ + scheme: k.scheme, + pubA: k.privA.Public(), + pubB: k.privB.Public(), + } +} + +type hybridKEMPubKey struct { + scheme kem.Scheme + pubA kem.PublicKey + pubB kem.PublicKey +} + +func (k *hybridKEMPubKey) Scheme() kem.Scheme { + return k.scheme +} + +func (k hybridKEMPubKey) MarshalBinary() ([]byte, error) { + pkA, err := k.pubA.MarshalBinary() + if err != nil { + return nil, err + } + pkB, err := k.pubB.MarshalBinary() + if err != nil { + return nil, err + } + return append(pkA, pkB...), nil +} + +func (k *hybridKEMPubKey) Equal(pk kem.PublicKey) bool { + k1, ok := pk.(*hybridKEMPubKey) + return ok && + k.pubA.Equal(k1.pubA) && + k.pubB.Equal(k1.pubB) +} + +// Deterministically derives a keypair from a seed. If you're unsure, +// you're better off using GenerateKey(). +// +// Panics if seed is not of length SeedSize(). +func (h hybridKEM) DeriveKeyPair(seed []byte) (kem.PublicKey, kem.PrivateKey) { + // Implementation based on + // https://www.ietf.org/archive/id/draft-irtf-cfrg-hpke-07.html#name-derivekeypair + if len(seed) != h.SeedSize() { + panic(kem.ErrSeedSize) + } + + outputSeedSize := h.kemA.SeedSize() + h.kemB.SeedSize() + dkpPrk := h.labeledExtract([]byte(""), []byte("dkp_prk"), seed) + bytes := h.labeledExpand( + dkpPrk, + []byte("sk"), + nil, + uint16(outputSeedSize), + ) + seedA := bytes[0:h.kemA.SeedSize()] + seedB := bytes[h.kemA.SeedSize():] + pubA, privA := h.kemA.DeriveKeyPair(seedA) + pubB, privB := h.kemB.DeriveKeyPair(seedB) + + privKey := &hybridKEMPrivKey{ + privA: privA, + privB: privB, + } + pubKey := &hybridKEMPubKey{ + pubA: pubA, + pubB: pubB, + } + + return pubKey, privKey +} + +func (h hybridKEM) GenerateKeyPair() (kem.PublicKey, kem.PrivateKey, error) { + seed := make([]byte, h.SeedSize()) + _, err := rand.Read(seed) + if err != nil { + return nil, nil, err + } + pk, sk := h.DeriveKeyPair(seed) + return pk, sk, nil +} + +func (h hybridKEM) UnmarshalBinaryPrivateKey(data []byte) (kem.PrivateKey, error) { + skA, err := h.kemA.UnmarshalBinaryPrivateKey(data[0:h.kemA.PrivateKeySize()]) + if err != nil { + return nil, err + } + skB, err := h.kemB.UnmarshalBinaryPrivateKey(data[h.kemA.PrivateKeySize():]) + if err != nil { + return nil, err + } + + return &hybridKEMPrivKey{ + privA: skA, + privB: skB, + }, nil +} + +func (h hybridKEM) UnmarshalBinaryPublicKey(data []byte) (kem.PublicKey, error) { + pkA, err := h.kemA.UnmarshalBinaryPublicKey(data[0:h.kemA.PublicKeySize()]) + if err != nil { + return nil, err + } + pkB, err := h.kemB.UnmarshalBinaryPublicKey(data[h.kemA.PublicKeySize():]) + if err != nil { + return nil, err + } + + return &hybridKEMPubKey{ + pubA: pkA, + pubB: pkB, + }, nil +} diff --git a/backend/vendor/github.com/cloudflare/circl/hpke/kembase.go b/backend/vendor/github.com/cloudflare/circl/hpke/kembase.go new file mode 100644 index 0000000..a15765f --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/hpke/kembase.go @@ -0,0 +1,241 @@ +package hpke + +import ( + "crypto" + "crypto/rand" + "encoding/binary" + "io" + + "github.com/cloudflare/circl/kem" + "golang.org/x/crypto/hkdf" +) + +type dhKEM interface { + sizeDH() int + calcDH(dh []byte, sk kem.PrivateKey, pk kem.PublicKey) error + SeedSize() int + DeriveKeyPair(seed []byte) (kem.PublicKey, kem.PrivateKey) + UnmarshalBinaryPrivateKey(data []byte) (kem.PrivateKey, error) + UnmarshalBinaryPublicKey(data []byte) (kem.PublicKey, error) +} + +type kemBase struct { + id KEM + name string + crypto.Hash +} + +type dhKemBase struct { + kemBase + dhKEM +} + +func (k kemBase) Name() string { return k.name } +func (k kemBase) SharedKeySize() int { return k.Hash.Size() } + +func (k kemBase) getSuiteID() (sid [5]byte) { + sid[0], sid[1], sid[2] = 'K', 'E', 'M' + binary.BigEndian.PutUint16(sid[3:5], uint16(k.id)) + return +} + +func (k kemBase) extractExpand(dh, kemCtx []byte) []byte { + eaePkr := k.labeledExtract([]byte(""), []byte("eae_prk"), dh) + return k.labeledExpand( + eaePkr, + []byte("shared_secret"), + kemCtx, + uint16(k.Size()), + ) +} + +func (k kemBase) labeledExtract(salt, label, info []byte) []byte { + suiteID := k.getSuiteID() + labeledIKM := append(append(append(append( + make([]byte, 0, len(versionLabel)+len(suiteID)+len(label)+len(info)), + versionLabel...), + suiteID[:]...), + label...), + info...) + return hkdf.Extract(k.New, labeledIKM, salt) +} + +func (k kemBase) labeledExpand(prk, label, info []byte, l uint16) []byte { + suiteID := k.getSuiteID() + labeledInfo := make( + []byte, + 2, + 2+len(versionLabel)+len(suiteID)+len(label)+len(info), + ) + binary.BigEndian.PutUint16(labeledInfo[0:2], l) + labeledInfo = append(append(append(append(labeledInfo, + versionLabel...), + suiteID[:]...), + label...), + info...) + b := make([]byte, l) + rd := hkdf.Expand(k.New, prk, labeledInfo) + if _, err := io.ReadFull(rd, b); err != nil { + panic(err) + } + return b +} + +func (k dhKemBase) AuthEncapsulate(pkr kem.PublicKey, sks kem.PrivateKey) ( + ct []byte, ss []byte, err error, +) { + seed := make([]byte, k.SeedSize()) + _, err = io.ReadFull(rand.Reader, seed) + if err != nil { + return nil, nil, err + } + + return k.authEncap(pkr, sks, seed) +} + +func (k dhKemBase) Encapsulate(pkr kem.PublicKey) ( + ct []byte, ss []byte, err error, +) { + seed := make([]byte, k.SeedSize()) + _, err = io.ReadFull(rand.Reader, seed) + if err != nil { + return nil, nil, err + } + + return k.encap(pkr, seed) +} + +func (k dhKemBase) AuthEncapsulateDeterministically( + pkr kem.PublicKey, sks kem.PrivateKey, seed []byte, +) (ct, ss []byte, err error) { + return k.authEncap(pkr, sks, seed) +} + +func (k dhKemBase) EncapsulateDeterministically( + pkr kem.PublicKey, seed []byte, +) (ct, ss []byte, err error) { + return k.encap(pkr, seed) +} + +func (k dhKemBase) encap( + pkR kem.PublicKey, + seed []byte, +) (ct []byte, ss []byte, err error) { + dh := make([]byte, k.sizeDH()) + enc, kemCtx, err := k.coreEncap(dh, pkR, seed) + if err != nil { + return nil, nil, err + } + ss = k.extractExpand(dh, kemCtx) + return enc, ss, nil +} + +func (k dhKemBase) authEncap( + pkR kem.PublicKey, + skS kem.PrivateKey, + seed []byte, +) (ct []byte, ss []byte, err error) { + dhLen := k.sizeDH() + dh := make([]byte, 2*dhLen) + enc, kemCtx, err := k.coreEncap(dh[:dhLen], pkR, seed) + if err != nil { + return nil, nil, err + } + + err = k.calcDH(dh[dhLen:], skS, pkR) + if err != nil { + return nil, nil, err + } + + pkS := skS.Public() + pkSm, err := pkS.MarshalBinary() + if err != nil { + return nil, nil, err + } + kemCtx = append(kemCtx, pkSm...) + + ss = k.extractExpand(dh, kemCtx) + return enc, ss, nil +} + +func (k dhKemBase) coreEncap( + dh []byte, + pkR kem.PublicKey, + seed []byte, +) (enc []byte, kemCtx []byte, err error) { + pkE, skE := k.DeriveKeyPair(seed) + err = k.calcDH(dh, skE, pkR) + if err != nil { + return nil, nil, err + } + + enc, err = pkE.MarshalBinary() + if err != nil { + return nil, nil, err + } + pkRm, err := pkR.MarshalBinary() + if err != nil { + return nil, nil, err + } + kemCtx = append(append([]byte{}, enc...), pkRm...) + + return enc, kemCtx, nil +} + +func (k dhKemBase) Decapsulate(skr kem.PrivateKey, ct []byte) ([]byte, error) { + dh := make([]byte, k.sizeDH()) + kemCtx, err := k.coreDecap(dh, skr, ct) + if err != nil { + return nil, err + } + return k.extractExpand(dh, kemCtx), nil +} + +func (k dhKemBase) AuthDecapsulate( + skR kem.PrivateKey, + ct []byte, + pkS kem.PublicKey, +) ([]byte, error) { + dhLen := k.sizeDH() + dh := make([]byte, 2*dhLen) + kemCtx, err := k.coreDecap(dh[:dhLen], skR, ct) + if err != nil { + return nil, err + } + + err = k.calcDH(dh[dhLen:], skR, pkS) + if err != nil { + return nil, err + } + + pkSm, err := pkS.MarshalBinary() + if err != nil { + return nil, err + } + kemCtx = append(kemCtx, pkSm...) + return k.extractExpand(dh, kemCtx), nil +} + +func (k dhKemBase) coreDecap( + dh []byte, + skR kem.PrivateKey, + ct []byte, +) ([]byte, error) { + pkE, err := k.UnmarshalBinaryPublicKey(ct) + if err != nil { + return nil, err + } + + err = k.calcDH(dh, skR, pkE) + if err != nil { + return nil, err + } + + pkR := skR.Public() + pkRm, err := pkR.MarshalBinary() + if err != nil { + return nil, err + } + + return append(append([]byte{}, ct...), pkRm...), nil +} diff --git a/backend/vendor/github.com/cloudflare/circl/hpke/marshal.go b/backend/vendor/github.com/cloudflare/circl/hpke/marshal.go new file mode 100644 index 0000000..4ce02ee --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/hpke/marshal.go @@ -0,0 +1,151 @@ +package hpke + +import ( + "errors" + + "golang.org/x/crypto/cryptobyte" +) + +// marshal serializes an HPKE context. +func (c *encdecContext) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint16(uint16(c.suite.kemID)) + b.AddUint16(uint16(c.suite.kdfID)) + b.AddUint16(uint16(c.suite.aeadID)) + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(c.exporterSecret) + }) + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(c.key) + }) + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(c.baseNonce) + }) + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(c.sequenceNumber) + }) + return b.Bytes() +} + +// unmarshalContext parses an HPKE context. +func unmarshalContext(raw []byte) (*encdecContext, error) { + var ( + err error + t cryptobyte.String + ) + + c := new(encdecContext) + s := cryptobyte.String(raw) + if !s.ReadUint16((*uint16)(&c.suite.kemID)) || + !s.ReadUint16((*uint16)(&c.suite.kdfID)) || + !s.ReadUint16((*uint16)(&c.suite.aeadID)) || + !s.ReadUint8LengthPrefixed(&t) || + !t.ReadBytes(&c.exporterSecret, len(t)) || + !s.ReadUint8LengthPrefixed(&t) || + !t.ReadBytes(&c.key, len(t)) || + !s.ReadUint8LengthPrefixed(&t) || + !t.ReadBytes(&c.baseNonce, len(t)) || + !s.ReadUint8LengthPrefixed(&t) || + !t.ReadBytes(&c.sequenceNumber, len(t)) { + return nil, errors.New("failed to parse context") + } + + if !c.suite.isValid() { + return nil, ErrInvalidHPKESuite + } + + Nh := c.suite.kdfID.ExtractSize() + if len(c.exporterSecret) != Nh { + return nil, errors.New("invalid exporter secret length") + } + + Nk := int(c.suite.aeadID.KeySize()) + if len(c.key) != Nk { + return nil, errors.New("invalid key length") + } + + c.AEAD, err = c.suite.aeadID.New(c.key) + if err != nil { + return nil, err + } + + Nn := int(c.suite.aeadID.NonceSize()) + if len(c.baseNonce) != Nn { + return nil, errors.New("invalid base nonce length") + } + if len(c.sequenceNumber) != Nn { + return nil, errors.New("invalid sequence number length") + } + c.nonce = make([]byte, Nn) + + return c, nil +} + +// MarshalBinary serializes an HPKE sealer according to the format specified +// below. (Expressed in TLS syntax.) Note that this format is not defined by +// the HPKE standard. +// +// enum { sealer(0), opener(1) } HpkeRole; +// +// struct { +// HpkeKemId kem_id; // draft-irtf-cfrg-hpke-07 +// HpkeKdfId kdf_id; // draft-irtf-cfrg-hpke-07 +// HpkeAeadId aead_id; // draft-irtf-cfrg-hpke-07 +// opaque exporter_secret<0..255>; +// opaque key<0..255>; +// opaque base_nonce<0..255>; +// opaque seq<0..255>; +// } HpkeContext; +// +// struct { +// HpkeRole role = 0; // sealer +// HpkeContext context; +// } HpkeSealer; +func (c *sealContext) MarshalBinary() ([]byte, error) { + rawContext, err := c.encdecContext.marshal() + if err != nil { + return nil, err + } + return append([]byte{0}, rawContext...), nil +} + +// UnmarshalSealer parses an HPKE sealer. +func UnmarshalSealer(raw []byte) (Sealer, error) { + if raw[0] != 0 { + return nil, errors.New("incorrect role") + } + context, err := unmarshalContext(raw[1:]) + if err != nil { + return nil, err + } + return &sealContext{context}, nil +} + +// MarshalBinary serializes an HPKE opener according to the format specified +// below. (Expressed in TLS syntax.) Note that this format is not defined by the +// HPKE standard. +// +// struct { +// HpkeRole role = 1; // opener +// HpkeContext context; +// } HpkeOpener; +func (c *openContext) MarshalBinary() ([]byte, error) { + rawContext, err := c.encdecContext.marshal() + if err != nil { + return nil, err + } + return append([]byte{1}, rawContext...), nil +} + +// UnmarshalOpener parses a serialized HPKE opener and returns the corresponding +// Opener. +func UnmarshalOpener(raw []byte) (Opener, error) { + if raw[0] != 1 { + return nil, errors.New("incorrect role") + } + context, err := unmarshalContext(raw[1:]) + if err != nil { + return nil, err + } + return &openContext{context}, nil +} diff --git a/backend/vendor/github.com/cloudflare/circl/hpke/shortkem.go b/backend/vendor/github.com/cloudflare/circl/hpke/shortkem.go new file mode 100644 index 0000000..2a0787e --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/hpke/shortkem.go @@ -0,0 +1,151 @@ +package hpke + +import ( + "crypto/ecdh" + "crypto/rand" + "fmt" + + "github.com/cloudflare/circl/kem" +) + +type shortKEM struct { + dhKemBase + ecdh.Curve +} + +func (s shortKEM) PrivateKeySize() int { return s.byteSize() } +func (s shortKEM) SeedSize() int { return s.byteSize() } +func (s shortKEM) CiphertextSize() int { return 1 + 2*s.byteSize() } +func (s shortKEM) PublicKeySize() int { return 1 + 2*s.byteSize() } +func (s shortKEM) EncapsulationSeedSize() int { return s.byteSize() } + +func (s shortKEM) byteSize() int { + var bits int + switch s.Curve { + case ecdh.P256(): + bits = 256 + case ecdh.P384(): + bits = 384 + case ecdh.P521(): + bits = 521 + default: + panic(ErrInvalidKEM) + } + + return (bits + 7) / 8 +} + +func (s shortKEM) sizeDH() int { return s.byteSize() } +func (s shortKEM) calcDH(dh []byte, sk kem.PrivateKey, pk kem.PublicKey) error { + PK, ok := pk.(*shortKEMPubKey) + if !ok { + return ErrInvalidKEMPublicKey + } + + SK, ok := sk.(*shortKEMPrivKey) + if !ok { + return ErrInvalidKEMPrivateKey + } + + x, err := SK.priv.ECDH(&PK.pub) + if err != nil { + return err + } + + copy(dh, x) + return nil +} + +// Deterministically derives a keypair from a seed. If you're unsure, +// you're better off using GenerateKey(). +// +// Panics if seed is not of length SeedSize(). +func (s shortKEM) DeriveKeyPair(seed []byte) (kem.PublicKey, kem.PrivateKey) { + // Implementation based on + // https://www.ietf.org/archive/id/draft-irtf-cfrg-hpke-07.html#name-derivekeypair + if len(seed) != s.SeedSize() { + panic(kem.ErrSeedSize) + } + + bitmask := byte(0xFF) + if s.Curve == ecdh.P521() { + bitmask = 0x01 + } + + dkpPrk := s.labeledExtract([]byte(""), []byte("dkp_prk"), seed) + for ctr := 0; ctr <= 255; ctr++ { + bytes := s.labeledExpand( + dkpPrk, + []byte("candidate"), + []byte{byte(ctr)}, + uint16(s.byteSize()), + ) + bytes[0] &= bitmask + sk, err := s.UnmarshalBinaryPrivateKey(bytes) + if err == nil { + return sk.Public(), sk + } + } + + panic(ErrInvalidKEMDeriveKey) +} + +func (s shortKEM) GenerateKeyPair() (kem.PublicKey, kem.PrivateKey, error) { + key, err := s.Curve.GenerateKey(rand.Reader) + if err != nil { + return nil, nil, err + } + + sk := &shortKEMPrivKey{s, key} + return sk.Public(), sk, err +} + +func (s shortKEM) UnmarshalBinaryPrivateKey(data []byte) (kem.PrivateKey, error) { + key, err := s.Curve.NewPrivateKey(data) + if err != nil { + return nil, err + } + + return &shortKEMPrivKey{s, key}, nil +} + +func (s shortKEM) UnmarshalBinaryPublicKey(data []byte) (kem.PublicKey, error) { + key, err := s.Curve.NewPublicKey(data) + if err != nil { + return nil, err + } + + return &shortKEMPubKey{s, *key}, nil +} + +type shortKEMPubKey struct { + scheme shortKEM + pub ecdh.PublicKey +} + +func (k *shortKEMPubKey) String() string { return fmt.Sprintf("%x", k.pub.Bytes()) } +func (k *shortKEMPubKey) Scheme() kem.Scheme { return k.scheme } +func (k *shortKEMPubKey) MarshalBinary() ([]byte, error) { return k.pub.Bytes(), nil } + +func (k *shortKEMPubKey) Equal(pk kem.PublicKey) bool { + k1, ok := pk.(*shortKEMPubKey) + return ok && k.scheme == k1.scheme && k.pub.Equal(&k1.pub) +} + +type shortKEMPrivKey struct { + scheme shortKEM + priv *ecdh.PrivateKey +} + +func (k *shortKEMPrivKey) String() string { return fmt.Sprintf("%x", k.priv.Bytes()) } +func (k *shortKEMPrivKey) Scheme() kem.Scheme { return k.scheme } +func (k *shortKEMPrivKey) MarshalBinary() ([]byte, error) { return k.priv.Bytes(), nil } + +func (k *shortKEMPrivKey) Equal(pk kem.PrivateKey) bool { + k1, ok := pk.(*shortKEMPrivKey) + return ok && k.scheme == k1.scheme && k.priv.Equal(k1.priv) +} + +func (k *shortKEMPrivKey) Public() kem.PublicKey { + return &shortKEMPubKey{k.scheme, *k.priv.PublicKey()} +} diff --git a/backend/vendor/github.com/cloudflare/circl/hpke/util.go b/backend/vendor/github.com/cloudflare/circl/hpke/util.go new file mode 100644 index 0000000..c9fed4f --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/hpke/util.go @@ -0,0 +1,121 @@ +package hpke + +import ( + "encoding/binary" + "errors" + "fmt" +) + +func (st state) keySchedule(ss, info, psk, pskID []byte) (*encdecContext, error) { + if err := st.verifyPSKInputs(psk, pskID); err != nil { + return nil, err + } + + pskIDHash := st.labeledExtract(nil, []byte("psk_id_hash"), pskID) + infoHash := st.labeledExtract(nil, []byte("info_hash"), info) + keySchCtx := append(append( + []byte{st.modeID}, + pskIDHash...), + infoHash...) + + secret := st.labeledExtract(ss, []byte("secret"), psk) + + Nk := uint16(st.aeadID.KeySize()) + key := st.labeledExpand(secret, []byte("key"), keySchCtx, Nk) + + aead, err := st.aeadID.New(key) + if err != nil { + return nil, err + } + + Nn := uint16(aead.NonceSize()) + baseNonce := st.labeledExpand(secret, []byte("base_nonce"), keySchCtx, Nn) + exporterSecret := st.labeledExpand( + secret, + []byte("exp"), + keySchCtx, + uint16(st.kdfID.ExtractSize()), + ) + + return &encdecContext{ + st.Suite, + ss, + secret, + keySchCtx, + exporterSecret, + key, + baseNonce, + make([]byte, Nn), + aead, + make([]byte, Nn), + }, nil +} + +func (st state) verifyPSKInputs(psk, pskID []byte) error { + gotPSK := psk != nil + gotPSKID := pskID != nil + if gotPSK != gotPSKID { + return errors.New("inconsistent PSK inputs") + } + switch st.modeID { + case modeBase | modeAuth: + if gotPSK { + return errors.New("PSK input provided when not needed") + } + case modePSK | modeAuthPSK: + if !gotPSK { + return errors.New("missing required PSK input") + } + } + return nil +} + +// Params returns the codepoints for the algorithms comprising the suite. +func (suite Suite) Params() (KEM, KDF, AEAD) { + return suite.kemID, suite.kdfID, suite.aeadID +} + +func (suite Suite) String() string { + return fmt.Sprintf( + "kem_id: %v kdf_id: %v aead_id: %v", + suite.kemID, suite.kdfID, suite.aeadID, + ) +} + +func (suite Suite) getSuiteID() (id [10]byte) { + id[0], id[1], id[2], id[3] = 'H', 'P', 'K', 'E' + binary.BigEndian.PutUint16(id[4:6], uint16(suite.kemID)) + binary.BigEndian.PutUint16(id[6:8], uint16(suite.kdfID)) + binary.BigEndian.PutUint16(id[8:10], uint16(suite.aeadID)) + return +} + +func (suite Suite) isValid() bool { + return suite.kemID.IsValid() && + suite.kdfID.IsValid() && + suite.aeadID.IsValid() +} + +func (suite Suite) labeledExtract(salt, label, ikm []byte) []byte { + suiteID := suite.getSuiteID() + labeledIKM := append(append(append(append( + make([]byte, 0, len(versionLabel)+len(suiteID)+len(label)+len(ikm)), + versionLabel...), + suiteID[:]...), + label...), + ikm...) + return suite.kdfID.Extract(labeledIKM, salt) +} + +func (suite Suite) labeledExpand(prk, label, info []byte, l uint16) []byte { + suiteID := suite.getSuiteID() + labeledInfo := make([]byte, + 2, 2+len(versionLabel)+len(suiteID)+len(label)+len(info)) + binary.BigEndian.PutUint16(labeledInfo[0:2], l) + labeledInfo = append(append(append(append(labeledInfo, + versionLabel...), + suiteID[:]...), + label...), + info...) + return suite.kdfID.Expand(prk, labeledInfo, uint(l)) +} diff --git a/backend/vendor/github.com/cloudflare/circl/hpke/xkem.go b/backend/vendor/github.com/cloudflare/circl/hpke/xkem.go new file mode 100644 index 0000000..f11ab6b --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/hpke/xkem.go @@ -0,0 +1,164 @@ +package hpke + +import ( + "bytes" + "crypto/rand" + "crypto/subtle" + "fmt" + "io" + + "github.com/cloudflare/circl/dh/x25519" + "github.com/cloudflare/circl/dh/x448" + "github.com/cloudflare/circl/kem" +) + +type xKEM struct { + dhKemBase + size int +} + +func (x xKEM) PrivateKeySize() int { return x.size } +func (x xKEM) SeedSize() int { return x.size } +func (x xKEM) CiphertextSize() int { return x.size } +func (x xKEM) PublicKeySize() int { return x.size } +func (x xKEM) EncapsulationSeedSize() int { return x.size } + +func (x xKEM) sizeDH() int { return x.size } +func (x xKEM) calcDH(dh []byte, sk kem.PrivateKey, pk kem.PublicKey) error { + PK := pk.(*xKEMPubKey) + SK := sk.(*xKEMPrivKey) + switch x.size { + case x25519.Size: + var ss, sKey, pKey x25519.Key + copy(sKey[:], SK.priv) + copy(pKey[:], PK.pub) + if !x25519.Shared(&ss, &sKey, &pKey) { + return ErrInvalidKEMSharedSecret + } + copy(dh, ss[:]) + case x448.Size: + var ss, sKey, pKey x448.Key + copy(sKey[:], SK.priv) + copy(pKey[:], PK.pub) + if !x448.Shared(&ss, &sKey, &pKey) { + return ErrInvalidKEMSharedSecret + } + copy(dh, ss[:]) + } + return nil +} + +// Deterministically derives a keypair from a seed. If you're unsure, +// you're better off using GenerateKey(). +// +// Panics if seed is not of length SeedSize(). +func (x xKEM) DeriveKeyPair(seed []byte) (kem.PublicKey, kem.PrivateKey) { + // Implementation based on + // https://www.ietf.org/archive/id/draft-irtf-cfrg-hpke-07.html#name-derivekeypair + if len(seed) != x.SeedSize() { + panic(kem.ErrSeedSize) + } + sk := &xKEMPrivKey{scheme: x, priv: make([]byte, x.size)} + dkpPrk := x.labeledExtract([]byte(""), []byte("dkp_prk"), seed) + bytes := x.labeledExpand( + dkpPrk, + []byte("sk"), + nil, + uint16(x.PrivateKeySize()), + ) + copy(sk.priv, bytes) + return sk.Public(), sk +} + +func (x xKEM) GenerateKeyPair() (kem.PublicKey, kem.PrivateKey, error) { + sk := &xKEMPrivKey{scheme: x, priv: make([]byte, x.PrivateKeySize())} + _, err := io.ReadFull(rand.Reader, sk.priv) + if err != nil { + return nil, nil, err + } + return sk.Public(), sk, nil +} + +func (x xKEM) UnmarshalBinaryPrivateKey(data []byte) (kem.PrivateKey, error) { + l := x.PrivateKeySize() + if len(data) < l { + return nil, ErrInvalidKEMPrivateKey + } + sk := &xKEMPrivKey{x, make([]byte, l), nil} + copy(sk.priv, data[:l]) + if !sk.validate() { + return nil, ErrInvalidKEMPrivateKey + } + return sk, nil +} + +func (x xKEM) UnmarshalBinaryPublicKey(data []byte) (kem.PublicKey, error) { + l := x.PublicKeySize() + if len(data) < l { + return nil, ErrInvalidKEMPublicKey + } + pk := &xKEMPubKey{x, make([]byte, l)} + copy(pk.pub, data[:l]) + if !pk.validate() { + return nil, ErrInvalidKEMPublicKey + } + return pk, nil +} + +type xKEMPubKey struct { + scheme xKEM + pub []byte +} + +func (k *xKEMPubKey) String() string { return fmt.Sprintf("%x", k.pub) } +func (k *xKEMPubKey) Scheme() kem.Scheme { return k.scheme } +func (k *xKEMPubKey) MarshalBinary() ([]byte, error) { + return append(make([]byte, 0, k.scheme.PublicKeySize()), k.pub...), nil +} + +func (k *xKEMPubKey) Equal(pk kem.PublicKey) bool { + k1, ok := pk.(*xKEMPubKey) + return ok && + k.scheme.id == k1.scheme.id && + bytes.Equal(k.pub, k1.pub) +} +func (k *xKEMPubKey) validate() bool { return len(k.pub) == k.scheme.PublicKeySize() } + +type xKEMPrivKey struct { + scheme xKEM + priv []byte + pub *xKEMPubKey +} + +func (k *xKEMPrivKey) String() string { return fmt.Sprintf("%x", k.priv) } +func (k *xKEMPrivKey) Scheme() kem.Scheme { return k.scheme } +func (k *xKEMPrivKey) MarshalBinary() ([]byte, error) { + return append(make([]byte, 0, k.scheme.PrivateKeySize()), k.priv...), nil +} + +func (k *xKEMPrivKey) Equal(pk kem.PrivateKey) bool { + k1, ok := pk.(*xKEMPrivKey) + return ok && + k.scheme.id == k1.scheme.id && + subtle.ConstantTimeCompare(k.priv, k1.priv) == 1 +} + +func (k *xKEMPrivKey) Public() kem.PublicKey { + if k.pub == nil { + k.pub = &xKEMPubKey{scheme: k.scheme, pub: make([]byte, k.scheme.size)} + switch k.scheme.size { + case x25519.Size: + var sk, pk x25519.Key + copy(sk[:], k.priv) + x25519.KeyGen(&pk, &sk) + copy(k.pub.pub, pk[:]) + case x448.Size: + var sk, pk x448.Key + copy(sk[:], k.priv) + x448.KeyGen(&pk, &sk) + copy(k.pub.pub, pk[:]) + } + } + return k.pub +} +func (k *xKEMPrivKey) validate() bool { return len(k.priv) == k.scheme.PrivateKeySize() } diff --git a/backend/vendor/github.com/cloudflare/circl/internal/conv/conv.go b/backend/vendor/github.com/cloudflare/circl/internal/conv/conv.go new file mode 100644 index 0000000..3fd0df4 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/internal/conv/conv.go @@ -0,0 +1,173 @@ +package conv + +import ( + "encoding/binary" + "fmt" + "math/big" + "strings" + + "golang.org/x/crypto/cryptobyte" +) + +// BytesLe2Hex returns an hexadecimal string of a number stored in a +// little-endian order slice x. +func BytesLe2Hex(x []byte) string { + b := &strings.Builder{} + b.Grow(2*len(x) + 2) + fmt.Fprint(b, "0x") + if len(x) == 0 { + fmt.Fprint(b, "00") + } + for i := len(x) - 1; i >= 0; i-- { + fmt.Fprintf(b, "%02x", x[i]) + } + return b.String() +} + +// BytesLe2BigInt converts a little-endian slice x into a big-endian +// math/big.Int. +func BytesLe2BigInt(x []byte) *big.Int { + n := len(x) + b := new(big.Int) + if len(x) > 0 { + y := make([]byte, n) + for i := 0; i < n; i++ { + y[n-1-i] = x[i] + } + b.SetBytes(y) + } + return b +} + +// BytesBe2Uint64Le converts a big-endian slice x to a little-endian slice of uint64. +func BytesBe2Uint64Le(x []byte) []uint64 { + l := len(x) + z := make([]uint64, (l+7)/8) + blocks := l / 8 + for i := 0; i < blocks; i++ { + z[i] = binary.BigEndian.Uint64(x[l-8*(i+1):]) + } + remBytes := l % 8 + for i := 0; i < remBytes; i++ { + z[blocks] |= uint64(x[l-1-8*blocks-i]) << uint(8*i) + } + return z +} + +// BigInt2BytesLe stores a positive big.Int number x into a little-endian slice z. +// The slice is modified if the bitlength of x <= 8*len(z) (padding with zeros). +// If x does not fit in the slice or is negative, z is not modified. +func BigInt2BytesLe(z []byte, x *big.Int) { + xLen := (x.BitLen() + 7) >> 3 + zLen := len(z) + if zLen >= xLen && x.Sign() >= 0 { + y := x.Bytes() + for i := 0; i < xLen; i++ { + z[i] = y[xLen-1-i] + } + for i := xLen; i < zLen; i++ { + z[i] = 0 + } + } +} + +// Uint64Le2BigInt converts a little-endian slice x into a big number. +func Uint64Le2BigInt(x []uint64) *big.Int { + n := len(x) + b := new(big.Int) + var bi big.Int + for i := n - 1; i >= 0; i-- { + bi.SetUint64(x[i]) + b.Lsh(b, 64) + b.Add(b, &bi) + } + return b +} + +// Uint64Le2BytesLe converts a little-endian slice x to a little-endian slice of bytes. +func Uint64Le2BytesLe(x []uint64) []byte { + b := make([]byte, 8*len(x)) + n := len(x) + for i := 0; i < n; i++ { + binary.LittleEndian.PutUint64(b[i*8:], x[i]) + } + return b +} + +// Uint64Le2BytesBe converts a little-endian slice x to a big-endian slice of bytes. +func Uint64Le2BytesBe(x []uint64) []byte { + b := make([]byte, 8*len(x)) + n := len(x) + for i := 0; i < n; i++ { + binary.BigEndian.PutUint64(b[i*8:], x[n-1-i]) + } + return b +} + +// Uint64Le2Hex returns an hexadecimal string of a number stored in a +// little-endian order slice x. +func Uint64Le2Hex(x []uint64) string { + b := new(strings.Builder) + b.Grow(16*len(x) + 2) + fmt.Fprint(b, "0x") + if len(x) == 0 { + fmt.Fprint(b, "00") + } + for i := len(x) - 1; i >= 0; i-- { + fmt.Fprintf(b, "%016x", x[i]) + } + return b.String() +} + +// BigInt2Uint64Le stores a positive big.Int number x into a little-endian slice z. +// The slice is modified if the bitlength of x <= 8*len(z) (padding with zeros). +// If x does not fit in the slice or is negative, z is not modified. +func BigInt2Uint64Le(z []uint64, x *big.Int) { + xLen := (x.BitLen() + 63) >> 6 // number of 64-bit words + zLen := len(z) + if zLen >= xLen && x.Sign() > 0 { + var y, yi big.Int + y.Set(x) + two64 := big.NewInt(1) + two64.Lsh(two64, 64).Sub(two64, big.NewInt(1)) + for i := 0; i < xLen; i++ { + yi.And(&y, two64) + z[i] = yi.Uint64() + y.Rsh(&y, 64) + } + } + for i := xLen; i < zLen; i++ { + z[i] = 0 + } +} + +// MarshalBinary encodes a value into a byte array in a format readable by UnmarshalBinary. +func MarshalBinary(v cryptobyte.MarshalingValue) ([]byte, error) { + const DefaultSize = 32 + b := cryptobyte.NewBuilder(make([]byte, 0, DefaultSize)) + b.AddValue(v) + return b.Bytes() +} + +// MarshalBinaryLen encodes a value into an array of n bytes in a format readable by UnmarshalBinary. +func MarshalBinaryLen(v cryptobyte.MarshalingValue, length uint) ([]byte, error) { + b := cryptobyte.NewFixedBuilder(make([]byte, 0, length)) + b.AddValue(v) + return b.Bytes() +} + +// A UnmarshalingValue decodes itself from a cryptobyte.String and advances the pointer. +// It reports whether the read was successful. +type UnmarshalingValue interface { + Unmarshal(*cryptobyte.String) bool +} + +// UnmarshalBinary recovers a value from a byte array. +// It returns an error if the read was unsuccessful. +func UnmarshalBinary(v UnmarshalingValue, data []byte) (err error) { + s := cryptobyte.String(data) + if data == nil || !v.Unmarshal(&s) || !s.Empty() { + err = fmt.Errorf("cannot read %T from input string", v) + } + return +} diff --git a/backend/vendor/github.com/cloudflare/circl/internal/sha3/doc.go b/backend/vendor/github.com/cloudflare/circl/internal/sha3/doc.go new file mode 100644 index 0000000..7e02309 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/internal/sha3/doc.go @@ -0,0 +1,62 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package sha3 implements the SHA-3 fixed-output-length hash functions and +// the SHAKE variable-output-length hash functions defined by FIPS-202. +// +// Both types of hash function use the "sponge" construction and the Keccak +// permutation. For a detailed specification see http://keccak.noekeon.org/ +// +// # Guidance +// +// If you aren't sure what function you need, use SHAKE256 with at least 64 +// bytes of output. The SHAKE instances are faster than the SHA3 instances; +// the latter have to allocate memory to conform to the hash.Hash interface. +// +// If you need a secret-key MAC (message authentication code), prepend the +// secret key to the input, hash with SHAKE256 and read at least 32 bytes of +// output. +// +// # Security strengths +// +// The SHA3-x (x equals 224, 256, 384, or 512) functions have a security +// strength against preimage attacks of x bits. Since they only produce "x" +// bits of output, their collision-resistance is only "x/2" bits. +// +// The SHAKE-256 and -128 functions have a generic security strength of 256 and +// 128 bits against all attacks, provided that at least 2x bits of their output +// is used. Requesting more than 64 or 32 bytes of output, respectively, does +// not increase the collision-resistance of the SHAKE functions. +// +// # The sponge construction +// +// A sponge builds a pseudo-random function from a public pseudo-random +// permutation, by applying the permutation to a state of "rate + capacity" +// bytes, but hiding "capacity" of the bytes. +// +// A sponge starts out with a zero state. To hash an input using a sponge, up +// to "rate" bytes of the input are XORed into the sponge's state. The sponge +// is then "full" and the permutation is applied to "empty" it. This process is +// repeated until all the input has been "absorbed". The input is then padded. +// The digest is "squeezed" from the sponge in the same way, except that output +// is copied out instead of input being XORed in. +// +// A sponge is parameterized by its generic security strength, which is equal +// to half its capacity; capacity + rate is equal to the permutation's width. +// Since the KeccakF-1600 permutation is 1600 bits (200 bytes) wide, this means +// that the security strength of a sponge instance is equal to (1600 - bitrate) / 2. +// +// # Recommendations +// +// The SHAKE functions are recommended for most new uses. They can produce +// output of arbitrary length. SHAKE256, with an output length of at least +// 64 bytes, provides 256-bit security against all attacks. The Keccak team +// recommends it for most applications upgrading from SHA2-512. (NIST chose a +// much stronger, but much slower, sponge instance for SHA3-512.) +// +// The SHA-3 functions are "drop-in" replacements for the SHA-2 functions. +// They produce output of the same length, with the same security strengths +// against all attacks. This means, in particular, that SHA3-256 only has +// 128-bit collision resistance, because its output length is 32 bytes. +package sha3 diff --git a/backend/vendor/github.com/cloudflare/circl/internal/sha3/hashes.go b/backend/vendor/github.com/cloudflare/circl/internal/sha3/hashes.go new file mode 100644 index 0000000..7d2365a --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/internal/sha3/hashes.go @@ -0,0 +1,69 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package sha3 + +// This file provides functions for creating instances of the SHA-3 +// and SHAKE hash functions, as well as utility functions for hashing +// bytes. + +// New224 creates a new SHA3-224 hash. +// Its generic security strength is 224 bits against preimage attacks, +// and 112 bits against collision attacks. +func New224() State { + return State{rate: 144, outputLen: 28, dsbyte: 0x06} +} + +// New256 creates a new SHA3-256 hash. +// Its generic security strength is 256 bits against preimage attacks, +// and 128 bits against collision attacks. +func New256() State { + return State{rate: 136, outputLen: 32, dsbyte: 0x06} +} + +// New384 creates a new SHA3-384 hash. +// Its generic security strength is 384 bits against preimage attacks, +// and 192 bits against collision attacks. +func New384() State { + return State{rate: 104, outputLen: 48, dsbyte: 0x06} +} + +// New512 creates a new SHA3-512 hash. +// Its generic security strength is 512 bits against preimage attacks, +// and 256 bits against collision attacks. +func New512() State { + return State{rate: 72, outputLen: 64, dsbyte: 0x06} +} + +// Sum224 returns the SHA3-224 digest of the data. +func Sum224(data []byte) (digest [28]byte) { + h := New224() + _, _ = h.Write(data) + h.Sum(digest[:0]) + return +} + +// Sum256 returns the SHA3-256 digest of the data. +func Sum256(data []byte) (digest [32]byte) { + h := New256() + _, _ = h.Write(data) + h.Sum(digest[:0]) + return +} + +// Sum384 returns the SHA3-384 digest of the data. +func Sum384(data []byte) (digest [48]byte) { + h := New384() + _, _ = h.Write(data) + h.Sum(digest[:0]) + return +} + +// Sum512 returns the SHA3-512 digest of the data. +func Sum512(data []byte) (digest [64]byte) { + h := New512() + _, _ = h.Write(data) + h.Sum(digest[:0]) + return +} diff --git a/backend/vendor/github.com/cloudflare/circl/internal/sha3/keccakf.go b/backend/vendor/github.com/cloudflare/circl/internal/sha3/keccakf.go new file mode 100644 index 0000000..1755fd1 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/internal/sha3/keccakf.go @@ -0,0 +1,391 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package sha3 + +// KeccakF1600 applies the Keccak permutation to a 1600b-wide +// state represented as a slice of 25 uint64s. +// If turbo is true, applies the 12-round variant instead of the +// regular 24-round variant. +// nolint:funlen +func KeccakF1600(a *[25]uint64, turbo bool) { + // Implementation translated from Keccak-inplace.c + // in the keccak reference code. + var t, bc0, bc1, bc2, bc3, bc4, d0, d1, d2, d3, d4 uint64 + + i := 0 + + if turbo { + i = 12 + } + + for ; i < 24; i += 4 { + // Combines the 5 steps in each round into 2 steps. + // Unrolls 4 rounds per loop and spreads some steps across rounds. + + // Round 1 + bc0 = a[0] ^ a[5] ^ a[10] ^ a[15] ^ a[20] + bc1 = a[1] ^ a[6] ^ a[11] ^ a[16] ^ a[21] + bc2 = a[2] ^ a[7] ^ a[12] ^ a[17] ^ a[22] + bc3 = a[3] ^ a[8] ^ a[13] ^ a[18] ^ a[23] + bc4 = a[4] ^ a[9] ^ a[14] ^ a[19] ^ a[24] + d0 = bc4 ^ (bc1<<1 | bc1>>63) + d1 = bc0 ^ (bc2<<1 | bc2>>63) + d2 = bc1 ^ (bc3<<1 | bc3>>63) + d3 = bc2 ^ (bc4<<1 | bc4>>63) + d4 = bc3 ^ (bc0<<1 | bc0>>63) + + bc0 = a[0] ^ d0 + t = a[6] ^ d1 + bc1 = t<<44 | t>>(64-44) + t = a[12] ^ d2 + bc2 = t<<43 | t>>(64-43) + t = a[18] ^ d3 + bc3 = t<<21 | t>>(64-21) + t = a[24] ^ d4 + bc4 = t<<14 | t>>(64-14) + a[0] = bc0 ^ (bc2 &^ bc1) ^ RC[i] + a[6] = bc1 ^ (bc3 &^ bc2) + a[12] = bc2 ^ (bc4 &^ bc3) + a[18] = bc3 ^ (bc0 &^ bc4) + a[24] = bc4 ^ (bc1 &^ bc0) + + t = a[10] ^ d0 + bc2 = t<<3 | t>>(64-3) + t = a[16] ^ d1 + bc3 = t<<45 | t>>(64-45) + t = a[22] ^ d2 + bc4 = t<<61 | t>>(64-61) + t = a[3] ^ d3 + bc0 = t<<28 | t>>(64-28) + t = a[9] ^ d4 + bc1 = t<<20 | t>>(64-20) + a[10] = bc0 ^ (bc2 &^ bc1) + a[16] = bc1 ^ (bc3 &^ bc2) + a[22] = bc2 ^ (bc4 &^ bc3) + a[3] = bc3 ^ (bc0 &^ bc4) + a[9] = bc4 ^ (bc1 &^ bc0) + + t = a[20] ^ d0 + bc4 = t<<18 | t>>(64-18) + t = a[1] ^ d1 + bc0 = t<<1 | t>>(64-1) + t = a[7] ^ d2 + bc1 = t<<6 | t>>(64-6) + t = a[13] ^ d3 + bc2 = t<<25 | t>>(64-25) + t = a[19] ^ d4 + bc3 = t<<8 | t>>(64-8) + a[20] = bc0 ^ (bc2 &^ bc1) + a[1] = bc1 ^ (bc3 &^ bc2) + a[7] = bc2 ^ (bc4 &^ bc3) + a[13] = bc3 ^ (bc0 &^ bc4) + a[19] = bc4 ^ (bc1 &^ bc0) + + t = a[5] ^ d0 + bc1 = t<<36 | t>>(64-36) + t = a[11] ^ d1 + bc2 = t<<10 | t>>(64-10) + t = a[17] ^ d2 + bc3 = t<<15 | t>>(64-15) + t = a[23] ^ d3 + bc4 = t<<56 | t>>(64-56) + t = a[4] ^ d4 + bc0 = t<<27 | t>>(64-27) + a[5] = bc0 ^ (bc2 &^ bc1) + a[11] = bc1 ^ (bc3 &^ bc2) + a[17] = bc2 ^ (bc4 &^ bc3) + a[23] = bc3 ^ (bc0 &^ bc4) + a[4] = bc4 ^ (bc1 &^ bc0) + + t = a[15] ^ d0 + bc3 = t<<41 | t>>(64-41) + t = a[21] ^ d1 + bc4 = t<<2 | t>>(64-2) + t = a[2] ^ d2 + bc0 = t<<62 | t>>(64-62) + t = a[8] ^ d3 + bc1 = t<<55 | t>>(64-55) + t = a[14] ^ d4 + bc2 = t<<39 | t>>(64-39) + a[15] = bc0 ^ (bc2 &^ bc1) + a[21] = bc1 ^ (bc3 &^ bc2) + a[2] = bc2 ^ (bc4 &^ bc3) + a[8] = bc3 ^ (bc0 &^ bc4) + a[14] = bc4 ^ (bc1 &^ bc0) + + // Round 2 + bc0 = a[0] ^ a[5] ^ a[10] ^ a[15] ^ a[20] + bc1 = a[1] ^ a[6] ^ a[11] ^ a[16] ^ a[21] + bc2 = a[2] ^ a[7] ^ a[12] ^ a[17] ^ a[22] + bc3 = a[3] ^ a[8] ^ a[13] ^ a[18] ^ a[23] + bc4 = a[4] ^ a[9] ^ a[14] ^ a[19] ^ a[24] + d0 = bc4 ^ (bc1<<1 | bc1>>63) + d1 = bc0 ^ (bc2<<1 | bc2>>63) + d2 = bc1 ^ (bc3<<1 | bc3>>63) + d3 = bc2 ^ (bc4<<1 | bc4>>63) + d4 = bc3 ^ (bc0<<1 | bc0>>63) + + bc0 = a[0] ^ d0 + t = a[16] ^ d1 + bc1 = t<<44 | t>>(64-44) + t = a[7] ^ d2 + bc2 = t<<43 | t>>(64-43) + t = a[23] ^ d3 + bc3 = t<<21 | t>>(64-21) + t = a[14] ^ d4 + bc4 = t<<14 | t>>(64-14) + a[0] = bc0 ^ (bc2 &^ bc1) ^ RC[i+1] + a[16] = bc1 ^ (bc3 &^ bc2) + a[7] = bc2 ^ (bc4 &^ bc3) + a[23] = bc3 ^ (bc0 &^ bc4) + a[14] = bc4 ^ (bc1 &^ bc0) + + t = a[20] ^ d0 + bc2 = t<<3 | t>>(64-3) + t = a[11] ^ d1 + bc3 = t<<45 | t>>(64-45) + t = a[2] ^ d2 + bc4 = t<<61 | t>>(64-61) + t = a[18] ^ d3 + bc0 = t<<28 | t>>(64-28) + t = a[9] ^ d4 + bc1 = t<<20 | t>>(64-20) + a[20] = bc0 ^ (bc2 &^ bc1) + a[11] = bc1 ^ (bc3 &^ bc2) + a[2] = bc2 ^ (bc4 &^ bc3) + a[18] = bc3 ^ (bc0 &^ bc4) + a[9] = bc4 ^ (bc1 &^ bc0) + + t = a[15] ^ d0 + bc4 = t<<18 | t>>(64-18) + t = a[6] ^ d1 + bc0 = t<<1 | t>>(64-1) + t = a[22] ^ d2 + bc1 = t<<6 | t>>(64-6) + t = a[13] ^ d3 + bc2 = t<<25 | t>>(64-25) + t = a[4] ^ d4 + bc3 = t<<8 | t>>(64-8) + a[15] = bc0 ^ (bc2 &^ bc1) + a[6] = bc1 ^ (bc3 &^ bc2) + a[22] = bc2 ^ (bc4 &^ bc3) + a[13] = bc3 ^ (bc0 &^ bc4) + a[4] = bc4 ^ (bc1 &^ bc0) + + t = a[10] ^ d0 + bc1 = t<<36 | t>>(64-36) + t = a[1] ^ d1 + bc2 = t<<10 | t>>(64-10) + t = a[17] ^ d2 + bc3 = t<<15 | t>>(64-15) + t = a[8] ^ d3 + bc4 = t<<56 | t>>(64-56) + t = a[24] ^ d4 + bc0 = t<<27 | t>>(64-27) + a[10] = bc0 ^ (bc2 &^ bc1) + a[1] = bc1 ^ (bc3 &^ bc2) + a[17] = bc2 ^ (bc4 &^ bc3) + a[8] = bc3 ^ (bc0 &^ bc4) + a[24] = bc4 ^ (bc1 &^ bc0) + + t = a[5] ^ d0 + bc3 = t<<41 | t>>(64-41) + t = a[21] ^ d1 + bc4 = t<<2 | t>>(64-2) + t = a[12] ^ d2 + bc0 = t<<62 | t>>(64-62) + t = a[3] ^ d3 + bc1 = t<<55 | t>>(64-55) + t = a[19] ^ d4 + bc2 = t<<39 | t>>(64-39) + a[5] = bc0 ^ (bc2 &^ bc1) + a[21] = bc1 ^ (bc3 &^ bc2) + a[12] = bc2 ^ (bc4 &^ bc3) + a[3] = bc3 ^ (bc0 &^ bc4) + a[19] = bc4 ^ (bc1 &^ bc0) + + // Round 3 + bc0 = a[0] ^ a[5] ^ a[10] ^ a[15] ^ a[20] + bc1 = a[1] ^ a[6] ^ a[11] ^ a[16] ^ a[21] + bc2 = a[2] ^ a[7] ^ a[12] ^ a[17] ^ a[22] + bc3 = a[3] ^ a[8] ^ a[13] ^ a[18] ^ a[23] + bc4 = a[4] ^ a[9] ^ a[14] ^ a[19] ^ a[24] + d0 = bc4 ^ (bc1<<1 | bc1>>63) + d1 = bc0 ^ (bc2<<1 | bc2>>63) + d2 = bc1 ^ (bc3<<1 | bc3>>63) + d3 = bc2 ^ (bc4<<1 | bc4>>63) + d4 = bc3 ^ (bc0<<1 | bc0>>63) + + bc0 = a[0] ^ d0 + t = a[11] ^ d1 + bc1 = t<<44 | t>>(64-44) + t = a[22] ^ d2 + bc2 = t<<43 | t>>(64-43) + t = a[8] ^ d3 + bc3 = t<<21 | t>>(64-21) + t = a[19] ^ d4 + bc4 = t<<14 | t>>(64-14) + a[0] = bc0 ^ (bc2 &^ bc1) ^ RC[i+2] + a[11] = bc1 ^ (bc3 &^ bc2) + a[22] = bc2 ^ (bc4 &^ bc3) + a[8] = bc3 ^ (bc0 &^ bc4) + a[19] = bc4 ^ (bc1 &^ bc0) + + t = a[15] ^ d0 + bc2 = t<<3 | t>>(64-3) + t = a[1] ^ d1 + bc3 = t<<45 | t>>(64-45) + t = a[12] ^ d2 + bc4 = t<<61 | t>>(64-61) + t = a[23] ^ d3 + bc0 = t<<28 | t>>(64-28) + t = a[9] ^ d4 + bc1 = t<<20 | t>>(64-20) + a[15] = bc0 ^ (bc2 &^ bc1) + a[1] = bc1 ^ (bc3 &^ bc2) + a[12] = bc2 ^ (bc4 &^ bc3) + a[23] = bc3 ^ (bc0 &^ bc4) + a[9] = bc4 ^ (bc1 &^ bc0) + + t = a[5] ^ d0 + bc4 = t<<18 | t>>(64-18) + t = a[16] ^ d1 + bc0 = t<<1 | t>>(64-1) + t = a[2] ^ d2 + bc1 = t<<6 | t>>(64-6) + t = a[13] ^ d3 + bc2 = t<<25 | t>>(64-25) + t = a[24] ^ d4 + bc3 = t<<8 | t>>(64-8) + a[5] = bc0 ^ (bc2 &^ bc1) + a[16] = bc1 ^ (bc3 &^ bc2) + a[2] = bc2 ^ (bc4 &^ bc3) + a[13] = bc3 ^ (bc0 &^ bc4) + a[24] = bc4 ^ (bc1 &^ bc0) + + t = a[20] ^ d0 + bc1 = t<<36 | t>>(64-36) + t = a[6] ^ d1 + bc2 = t<<10 | t>>(64-10) + t = a[17] ^ d2 + bc3 = t<<15 | t>>(64-15) + t = a[3] ^ d3 + bc4 = t<<56 | t>>(64-56) + t = a[14] ^ d4 + bc0 = t<<27 | t>>(64-27) + a[20] = bc0 ^ (bc2 &^ bc1) + a[6] = bc1 ^ (bc3 &^ bc2) + a[17] = bc2 ^ (bc4 &^ bc3) + a[3] = bc3 ^ (bc0 &^ bc4) + a[14] = bc4 ^ (bc1 &^ bc0) + + t = a[10] ^ d0 + bc3 = t<<41 | t>>(64-41) + t = a[21] ^ d1 + bc4 = t<<2 | t>>(64-2) + t = a[7] ^ d2 + bc0 = t<<62 | t>>(64-62) + t = a[18] ^ d3 + bc1 = t<<55 | t>>(64-55) + t = a[4] ^ d4 + bc2 = t<<39 | t>>(64-39) + a[10] = bc0 ^ (bc2 &^ bc1) + a[21] = bc1 ^ (bc3 &^ bc2) + a[7] = bc2 ^ (bc4 &^ bc3) + a[18] = bc3 ^ (bc0 &^ bc4) + a[4] = bc4 ^ (bc1 &^ bc0) + + // Round 4 + bc0 = a[0] ^ a[5] ^ a[10] ^ a[15] ^ a[20] + bc1 = a[1] ^ a[6] ^ a[11] ^ a[16] ^ a[21] + bc2 = a[2] ^ a[7] ^ a[12] ^ a[17] ^ a[22] + bc3 = a[3] ^ a[8] ^ a[13] ^ a[18] ^ a[23] + bc4 = a[4] ^ a[9] ^ a[14] ^ a[19] ^ a[24] + d0 = bc4 ^ (bc1<<1 | bc1>>63) + d1 = bc0 ^ (bc2<<1 | bc2>>63) + d2 = bc1 ^ (bc3<<1 | bc3>>63) + d3 = bc2 ^ (bc4<<1 | bc4>>63) + d4 = bc3 ^ (bc0<<1 | bc0>>63) + + bc0 = a[0] ^ d0 + t = a[1] ^ d1 + bc1 = t<<44 | t>>(64-44) + t = a[2] ^ d2 + bc2 = t<<43 | t>>(64-43) + t = a[3] ^ d3 + bc3 = t<<21 | t>>(64-21) + t = a[4] ^ d4 + bc4 = t<<14 | t>>(64-14) + a[0] = bc0 ^ (bc2 &^ bc1) ^ RC[i+3] + a[1] = bc1 ^ (bc3 &^ bc2) + a[2] = bc2 ^ (bc4 &^ bc3) + a[3] = bc3 ^ (bc0 &^ bc4) + a[4] = bc4 ^ (bc1 &^ bc0) + + t = a[5] ^ d0 + bc2 = t<<3 | t>>(64-3) + t = a[6] ^ d1 + bc3 = t<<45 | t>>(64-45) + t = a[7] ^ d2 + bc4 = t<<61 | t>>(64-61) + t = a[8] ^ d3 + bc0 = t<<28 | t>>(64-28) + t = a[9] ^ d4 + bc1 = t<<20 | t>>(64-20) + a[5] = bc0 ^ (bc2 &^ bc1) + a[6] = bc1 ^ (bc3 &^ bc2) + a[7] = bc2 ^ (bc4 &^ bc3) + a[8] = bc3 ^ (bc0 &^ bc4) + a[9] = bc4 ^ (bc1 &^ bc0) + + t = a[10] ^ d0 + bc4 = t<<18 | t>>(64-18) + t = a[11] ^ d1 + bc0 = t<<1 | t>>(64-1) + t = a[12] ^ d2 + bc1 = t<<6 | t>>(64-6) + t = a[13] ^ d3 + bc2 = t<<25 | t>>(64-25) + t = a[14] ^ d4 + bc3 = t<<8 | t>>(64-8) + a[10] = bc0 ^ (bc2 &^ bc1) + a[11] = bc1 ^ (bc3 &^ bc2) + a[12] = bc2 ^ (bc4 &^ bc3) + a[13] = bc3 ^ (bc0 &^ bc4) + a[14] = bc4 ^ (bc1 &^ bc0) + + t = a[15] ^ d0 + bc1 = t<<36 | t>>(64-36) + t = a[16] ^ d1 + bc2 = t<<10 | t>>(64-10) + t = a[17] ^ d2 + bc3 = t<<15 | t>>(64-15) + t = a[18] ^ d3 + bc4 = t<<56 | t>>(64-56) + t = a[19] ^ d4 + bc0 = t<<27 | t>>(64-27) + a[15] = bc0 ^ (bc2 &^ bc1) + a[16] = bc1 ^ (bc3 &^ bc2) + a[17] = bc2 ^ (bc4 &^ bc3) + a[18] = bc3 ^ (bc0 &^ bc4) + a[19] = bc4 ^ (bc1 &^ bc0) + + t = a[20] ^ d0 + bc3 = t<<41 | t>>(64-41) + t = a[21] ^ d1 + bc4 = t<<2 | t>>(64-2) + t = a[22] ^ d2 + bc0 = t<<62 | t>>(64-62) + t = a[23] ^ d3 + bc1 = t<<55 | t>>(64-55) + t = a[24] ^ d4 + bc2 = t<<39 | t>>(64-39) + a[20] = bc0 ^ (bc2 &^ bc1) + a[21] = bc1 ^ (bc3 &^ bc2) + a[22] = bc2 ^ (bc4 &^ bc3) + a[23] = bc3 ^ (bc0 &^ bc4) + a[24] = bc4 ^ (bc1 &^ bc0) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/internal/sha3/rc.go b/backend/vendor/github.com/cloudflare/circl/internal/sha3/rc.go new file mode 100644 index 0000000..6a3df42 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/internal/sha3/rc.go @@ -0,0 +1,29 @@ +package sha3 + +// RC stores the round constants for use in the ι step. +var RC = [24]uint64{ + 0x0000000000000001, + 0x0000000000008082, + 0x800000000000808A, + 0x8000000080008000, + 0x000000000000808B, + 0x0000000080000001, + 0x8000000080008081, + 0x8000000000008009, + 0x000000000000008A, + 0x0000000000000088, + 0x0000000080008009, + 0x000000008000000A, + 0x000000008000808B, + 0x800000000000008B, + 0x8000000000008089, + 0x8000000000008003, + 0x8000000000008002, + 0x8000000000000080, + 0x000000000000800A, + 0x800000008000000A, + 0x8000000080008081, + 0x8000000000008080, + 0x0000000080000001, + 0x8000000080008008, +} diff --git a/backend/vendor/github.com/cloudflare/circl/internal/sha3/sha3.go b/backend/vendor/github.com/cloudflare/circl/internal/sha3/sha3.go new file mode 100644 index 0000000..a0df5aa --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/internal/sha3/sha3.go @@ -0,0 +1,200 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package sha3 + +// spongeDirection indicates the direction bytes are flowing through the sponge. +type spongeDirection int + +const ( + // spongeAbsorbing indicates that the sponge is absorbing input. + spongeAbsorbing spongeDirection = iota + // spongeSqueezing indicates that the sponge is being squeezed. + spongeSqueezing +) + +const ( + // maxRate is the maximum size of the internal buffer. SHAKE-256 + // currently needs the largest buffer. + maxRate = 168 +) + +func (d *State) buf() []byte { + return d.storage.asBytes()[d.bufo:d.bufe] +} + +type State struct { + // Generic sponge components. + a [25]uint64 // main state of the hash + rate int // the number of bytes of state to use + + bufo int // offset of buffer in storage + bufe int // end of buffer in storage + + // dsbyte contains the "domain separation" bits and the first bit of + // the padding. Sections 6.1 and 6.2 of [1] separate the outputs of the + // SHA-3 and SHAKE functions by appending bitstrings to the message. + // Using a little-endian bit-ordering convention, these are "01" for SHA-3 + // and "1111" for SHAKE, or 00000010b and 00001111b, respectively. Then the + // padding rule from section 5.1 is applied to pad the message to a multiple + // of the rate, which involves adding a "1" bit, zero or more "0" bits, and + // a final "1" bit. We merge the first "1" bit from the padding into dsbyte, + // giving 00000110b (0x06) and 00011111b (0x1f). + // [1] http://csrc.nist.gov/publications/drafts/fips-202/fips_202_draft.pdf + // "Draft FIPS 202: SHA-3 Standard: Permutation-Based Hash and + // Extendable-Output Functions (May 2014)" + dsbyte byte + + storage storageBuf + + // Specific to SHA-3 and SHAKE. + outputLen int // the default output size in bytes + state spongeDirection // whether the sponge is absorbing or squeezing + turbo bool // Whether we're using 12 rounds instead of 24 +} + +// BlockSize returns the rate of sponge underlying this hash function. +func (d *State) BlockSize() int { return d.rate } + +// Size returns the output size of the hash function in bytes. +func (d *State) Size() int { return d.outputLen } + +// Reset clears the internal state by zeroing the sponge state and +// the byte buffer, and setting Sponge.state to absorbing. +func (d *State) Reset() { + // Zero the permutation's state. + for i := range d.a { + d.a[i] = 0 + } + d.state = spongeAbsorbing + d.bufo = 0 + d.bufe = 0 +} + +func (d *State) clone() *State { + ret := *d + return &ret +} + +// permute applies the KeccakF-1600 permutation. It handles +// any input-output buffering. +func (d *State) permute() { + switch d.state { + case spongeAbsorbing: + // If we're absorbing, we need to xor the input into the state + // before applying the permutation. + xorIn(d, d.buf()) + d.bufe = 0 + d.bufo = 0 + KeccakF1600(&d.a, d.turbo) + case spongeSqueezing: + // If we're squeezing, we need to apply the permutation before + // copying more output. + KeccakF1600(&d.a, d.turbo) + d.bufe = d.rate + d.bufo = 0 + copyOut(d, d.buf()) + } +} + +// pads appends the domain separation bits in dsbyte, applies +// the multi-bitrate 10..1 padding rule, and permutes the state. +func (d *State) padAndPermute(dsbyte byte) { + // Pad with this instance's domain-separator bits. We know that there's + // at least one byte of space in d.buf() because, if it were full, + // permute would have been called to empty it. dsbyte also contains the + // first one bit for the padding. See the comment in the state struct. + zerosStart := d.bufe + 1 + d.bufe = d.rate + buf := d.buf() + buf[zerosStart-1] = dsbyte + for i := zerosStart; i < d.rate; i++ { + buf[i] = 0 + } + // This adds the final one bit for the padding. Because of the way that + // bits are numbered from the LSB upwards, the final bit is the MSB of + // the last byte. + buf[d.rate-1] ^= 0x80 + // Apply the permutation + d.permute() + d.state = spongeSqueezing + d.bufe = d.rate + copyOut(d, buf) +} + +// Write absorbs more data into the hash's state. It produces an error +// if more data is written to the ShakeHash after writing +func (d *State) Write(p []byte) (written int, err error) { + if d.state != spongeAbsorbing { + panic("sha3: write to sponge after read") + } + written = len(p) + + for len(p) > 0 { + bufl := d.bufe - d.bufo + if bufl == 0 && len(p) >= d.rate { + // The fast path; absorb a full "rate" bytes of input and apply the permutation. + xorIn(d, p[:d.rate]) + p = p[d.rate:] + KeccakF1600(&d.a, d.turbo) + } else { + // The slow path; buffer the input until we can fill the sponge, and then xor it in. + todo := d.rate - bufl + if todo > len(p) { + todo = len(p) + } + d.bufe += todo + buf := d.buf() + copy(buf[bufl:], p[:todo]) + p = p[todo:] + + // If the sponge is full, apply the permutation. + if d.bufe == d.rate { + d.permute() + } + } + } + + return written, nil +} + +// Read squeezes an arbitrary number of bytes from the sponge. +func (d *State) Read(out []byte) (n int, err error) { + // If we're still absorbing, pad and apply the permutation. + if d.state == spongeAbsorbing { + d.padAndPermute(d.dsbyte) + } + + n = len(out) + + // Now, do the squeezing. + for len(out) > 0 { + buf := d.buf() + n := copy(out, buf) + d.bufo += n + out = out[n:] + + // Apply the permutation if we've squeezed the sponge dry. + if d.bufo == d.bufe { + d.permute() + } + } + + return +} + +// Sum applies padding to the hash state and then squeezes out the desired +// number of output bytes. +func (d *State) Sum(in []byte) []byte { + // Make a copy of the original hash so that caller can keep writing + // and summing. + dup := d.clone() + hash := make([]byte, dup.outputLen) + _, _ = dup.Read(hash) + return append(in, hash...) +} + +func (d *State) IsAbsorbing() bool { + return d.state == spongeAbsorbing +} diff --git a/backend/vendor/github.com/cloudflare/circl/internal/sha3/sha3_s390x.s b/backend/vendor/github.com/cloudflare/circl/internal/sha3/sha3_s390x.s new file mode 100644 index 0000000..8a4458f --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/internal/sha3/sha3_s390x.s @@ -0,0 +1,33 @@ +// Copyright 2017 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !gccgo,!appengine + +#include "textflag.h" + +// func kimd(function code, chain *[200]byte, src []byte) +TEXT ·kimd(SB), NOFRAME|NOSPLIT, $0-40 + MOVD function+0(FP), R0 + MOVD chain+8(FP), R1 + LMG src+16(FP), R2, R3 // R2=base, R3=len + +continue: + WORD $0xB93E0002 // KIMD --, R2 + BVS continue // continue if interrupted + MOVD $0, R0 // reset R0 for pre-go1.8 compilers + RET + +// func klmd(function code, chain *[200]byte, dst, src []byte) +TEXT ·klmd(SB), NOFRAME|NOSPLIT, $0-64 + // TODO: SHAKE support + MOVD function+0(FP), R0 + MOVD chain+8(FP), R1 + LMG dst+16(FP), R2, R3 // R2=base, R3=len + LMG src+40(FP), R4, R5 // R4=base, R5=len + +continue: + WORD $0xB93F0024 // KLMD R2, R4 + BVS continue // continue if interrupted + MOVD $0, R0 // reset R0 for pre-go1.8 compilers + RET diff --git a/backend/vendor/github.com/cloudflare/circl/internal/sha3/shake.go b/backend/vendor/github.com/cloudflare/circl/internal/sha3/shake.go new file mode 100644 index 0000000..77817f7 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/internal/sha3/shake.go @@ -0,0 +1,119 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package sha3 + +// This file defines the ShakeHash interface, and provides +// functions for creating SHAKE and cSHAKE instances, as well as utility +// functions for hashing bytes to arbitrary-length output. +// +// +// SHAKE implementation is based on FIPS PUB 202 [1] +// cSHAKE implementations is based on NIST SP 800-185 [2] +// +// [1] https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.202.pdf +// [2] https://doi.org/10.6028/NIST.SP.800-185 + +import ( + "io" +) + +// ShakeHash defines the interface to hash functions that +// support arbitrary-length output. +type ShakeHash interface { + // Write absorbs more data into the hash's state. It panics if input is + // written to it after output has been read from it. + io.Writer + + // Read reads more output from the hash; reading affects the hash's + // state. (ShakeHash.Read is thus very different from Hash.Sum) + // It never returns an error. + io.Reader + + // Clone returns a copy of the ShakeHash in its current state. + Clone() ShakeHash + + // Reset resets the ShakeHash to its initial state. + Reset() +} + +// Consts for configuring initial SHA-3 state +const ( + dsbyteShake = 0x1f + rate128 = 168 + rate256 = 136 +) + +// Clone returns copy of SHAKE context within its current state. +func (d *State) Clone() ShakeHash { + return d.clone() +} + +// NewShake128 creates a new SHAKE128 variable-output-length ShakeHash. +// Its generic security strength is 128 bits against all attacks if at +// least 32 bytes of its output are used. +func NewShake128() State { + return State{rate: rate128, dsbyte: dsbyteShake} +} + +// NewTurboShake128 creates a new TurboSHAKE128 variable-output-length ShakeHash. +// Its generic security strength is 128 bits against all attacks if at +// least 32 bytes of its output are used. +// D is the domain separation byte and must be between 0x01 and 0x7f inclusive. +func NewTurboShake128(D byte) State { + if D == 0 || D > 0x7f { + panic("turboshake: D out of range") + } + return State{rate: rate128, dsbyte: D, turbo: true} +} + +// NewShake256 creates a new SHAKE256 variable-output-length ShakeHash. +// Its generic security strength is 256 bits against all attacks if +// at least 64 bytes of its output are used. +func NewShake256() State { + return State{rate: rate256, dsbyte: dsbyteShake} +} + +// NewTurboShake256 creates a new TurboSHAKE256 variable-output-length ShakeHash. +// Its generic security strength is 256 bits against all attacks if +// at least 64 bytes of its output are used. +// D is the domain separation byte and must be between 0x01 and 0x7f inclusive. +func NewTurboShake256(D byte) State { + if D == 0 || D > 0x7f { + panic("turboshake: D out of range") + } + return State{rate: rate256, dsbyte: D, turbo: true} +} + +// ShakeSum128 writes an arbitrary-length digest of data into hash. +func ShakeSum128(hash, data []byte) { + h := NewShake128() + _, _ = h.Write(data) + _, _ = h.Read(hash) +} + +// ShakeSum256 writes an arbitrary-length digest of data into hash. +func ShakeSum256(hash, data []byte) { + h := NewShake256() + _, _ = h.Write(data) + _, _ = h.Read(hash) +} + +// TurboShakeSum128 writes an arbitrary-length digest of data into hash. +func TurboShakeSum128(hash, data []byte, D byte) { + h := NewTurboShake128(D) + _, _ = h.Write(data) + _, _ = h.Read(hash) +} + +// TurboShakeSum256 writes an arbitrary-length digest of data into hash. +func TurboShakeSum256(hash, data []byte, D byte) { + h := NewTurboShake256(D) + _, _ = h.Write(data) + _, _ = h.Read(hash) +} + +func (d *State) SwitchDS(D byte) { + d.dsbyte = D +} diff --git a/backend/vendor/github.com/cloudflare/circl/internal/sha3/xor.go b/backend/vendor/github.com/cloudflare/circl/internal/sha3/xor.go new file mode 100644 index 0000000..1e21337 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/internal/sha3/xor.go @@ -0,0 +1,15 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build (!amd64 && !386 && !ppc64le) || appengine +// +build !amd64,!386,!ppc64le appengine + +package sha3 + +// A storageBuf is an aligned array of maxRate bytes. +type storageBuf [maxRate]byte + +func (b *storageBuf) asBytes() *[maxRate]byte { + return (*[maxRate]byte)(b) +} diff --git a/backend/vendor/github.com/cloudflare/circl/internal/sha3/xor_generic.go b/backend/vendor/github.com/cloudflare/circl/internal/sha3/xor_generic.go new file mode 100644 index 0000000..2b0c661 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/internal/sha3/xor_generic.go @@ -0,0 +1,33 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build (!amd64 || appengine) && (!386 || appengine) && (!ppc64le || appengine) +// +build !amd64 appengine +// +build !386 appengine +// +build !ppc64le appengine + +package sha3 + +import "encoding/binary" + +// xorIn xors the bytes in buf into the state; it +// makes no non-portable assumptions about memory layout +// or alignment. +func xorIn(d *State, buf []byte) { + n := len(buf) / 8 + + for i := 0; i < n; i++ { + a := binary.LittleEndian.Uint64(buf) + d.a[i] ^= a + buf = buf[8:] + } +} + +// copyOut copies ulint64s to a byte buffer. +func copyOut(d *State, b []byte) { + for i := 0; len(b) >= 8; i++ { + binary.LittleEndian.PutUint64(b, d.a[i]) + b = b[8:] + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/internal/sha3/xor_unaligned.go b/backend/vendor/github.com/cloudflare/circl/internal/sha3/xor_unaligned.go new file mode 100644 index 0000000..052fc8d --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/internal/sha3/xor_unaligned.go @@ -0,0 +1,61 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build (amd64 || 386 || ppc64le) && !appengine +// +build amd64 386 ppc64le +// +build !appengine + +package sha3 + +import "unsafe" + +// A storageBuf is an aligned array of maxRate bytes. +type storageBuf [maxRate / 8]uint64 + +func (b *storageBuf) asBytes() *[maxRate]byte { + return (*[maxRate]byte)(unsafe.Pointer(b)) +} + +// xorInuses unaligned reads and writes to update d.a to contain d.a +// XOR buf. +func xorIn(d *State, buf []byte) { + n := len(buf) + bw := (*[maxRate / 8]uint64)(unsafe.Pointer(&buf[0]))[: n/8 : n/8] + if n >= 72 { + d.a[0] ^= bw[0] + d.a[1] ^= bw[1] + d.a[2] ^= bw[2] + d.a[3] ^= bw[3] + d.a[4] ^= bw[4] + d.a[5] ^= bw[5] + d.a[6] ^= bw[6] + d.a[7] ^= bw[7] + d.a[8] ^= bw[8] + } + if n >= 104 { + d.a[9] ^= bw[9] + d.a[10] ^= bw[10] + d.a[11] ^= bw[11] + d.a[12] ^= bw[12] + } + if n >= 136 { + d.a[13] ^= bw[13] + d.a[14] ^= bw[14] + d.a[15] ^= bw[15] + d.a[16] ^= bw[16] + } + if n >= 144 { + d.a[17] ^= bw[17] + } + if n >= 168 { + d.a[18] ^= bw[18] + d.a[19] ^= bw[19] + d.a[20] ^= bw[20] + } +} + +func copyOut(d *State, buf []byte) { + ab := (*[maxRate]uint8)(unsafe.Pointer(&d.a[0])) + copy(buf, ab[:]) +} diff --git a/backend/vendor/github.com/cloudflare/circl/kem/kem.go b/backend/vendor/github.com/cloudflare/circl/kem/kem.go new file mode 100644 index 0000000..a2f6a2a --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/kem/kem.go @@ -0,0 +1,121 @@ +// Package kem provides a unified interface for KEM schemes. +// +// A register of schemes is available in the package +// +// github.com/cloudflare/circl/kem/schemes +package kem + +import ( + "encoding" + "errors" +) + +// A KEM public key +type PublicKey interface { + // Returns the scheme for this public key + Scheme() Scheme + + encoding.BinaryMarshaler + Equal(PublicKey) bool +} + +// A KEM private key +type PrivateKey interface { + // Returns the scheme for this private key + Scheme() Scheme + + encoding.BinaryMarshaler + Equal(PrivateKey) bool + Public() PublicKey +} + +// A Scheme represents a specific instance of a KEM. +type Scheme interface { + // Name of the scheme + Name() string + + // GenerateKeyPair creates a new key pair. + GenerateKeyPair() (PublicKey, PrivateKey, error) + + // Encapsulate generates a shared key ss for the public key and + // encapsulates it into a ciphertext ct. + Encapsulate(pk PublicKey) (ct, ss []byte, err error) + + // Returns the shared key encapsulated in ciphertext ct for the + // private key sk. + Decapsulate(sk PrivateKey, ct []byte) ([]byte, error) + + // Unmarshals a PublicKey from the provided buffer. + UnmarshalBinaryPublicKey([]byte) (PublicKey, error) + + // Unmarshals a PrivateKey from the provided buffer. + UnmarshalBinaryPrivateKey([]byte) (PrivateKey, error) + + // Size of encapsulated keys. + CiphertextSize() int + + // Size of established shared keys. + SharedKeySize() int + + // Size of packed private keys. + PrivateKeySize() int + + // Size of packed public keys. + PublicKeySize() int + + // DeriveKeyPair deterministically derives a pair of keys from a seed. + // Panics if the length of seed is not equal to the value returned by + // SeedSize. + DeriveKeyPair(seed []byte) (PublicKey, PrivateKey) + + // Size of seed used in DeriveKey + SeedSize() int + + // EncapsulateDeterministically generates a shared key ss for the public + // key deterministically from the given seed and encapsulates it into + // a ciphertext ct. If unsure, you're better off using Encapsulate(). + EncapsulateDeterministically(pk PublicKey, seed []byte) ( + ct, ss []byte, err error) + + // Size of seed used in EncapsulateDeterministically(). + EncapsulationSeedSize() int +} + +// AuthScheme represents a KEM that supports authenticated key encapsulation. +type AuthScheme interface { + Scheme + AuthEncapsulate(pkr PublicKey, sks PrivateKey) (ct, ss []byte, err error) + AuthEncapsulateDeterministically(pkr PublicKey, sks PrivateKey, seed []byte) (ct, ss []byte, err error) + AuthDecapsulate(skr PrivateKey, ct []byte, pks PublicKey) ([]byte, error) +} + +var ( + // ErrTypeMismatch is the error used if types of, for instance, private + // and public keys don't match + ErrTypeMismatch = errors.New("types mismatch") + + // ErrSeedSize is the error used if the provided seed is of the wrong + // size. + ErrSeedSize = errors.New("wrong seed size") + + // ErrPubKeySize is the error used if the provided public key is of + // the wrong size. + ErrPubKeySize = errors.New("wrong size for public key") + + // ErrCiphertextSize is the error used if the provided ciphertext + // is of the wrong size. + ErrCiphertextSize = errors.New("wrong size for ciphertext") + + // ErrPrivKeySize is the error used if the provided private key is of + // the wrong size. + ErrPrivKeySize = errors.New("wrong size for private key") + + // ErrPubKey is the error used if the provided public key is invalid. + ErrPubKey = errors.New("invalid public key") + + // ErrPrivKey is the error used if the provided private key is invalid. + ErrPrivKey = errors.New("invalid private key") + + // ErrCipherText is the error used if the provided ciphertext is invalid. + ErrCipherText = errors.New("invalid ciphertext") +) diff --git a/backend/vendor/github.com/cloudflare/circl/kem/kyber/kyber768/kyber.go b/backend/vendor/github.com/cloudflare/circl/kem/kyber/kyber768/kyber.go new file mode 100644 index 0000000..0e03c40 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/kem/kyber/kyber768/kyber.go @@ -0,0 +1,405 @@ +// Code generated from pkg.templ.go. DO NOT EDIT. + +// Package kyber768 implements the IND-CCA2 secure key encapsulation mechanism +// Kyber768.CCAKEM as submitted to round 3 of the NIST PQC competition and +// described in +// +// https://pq-crystals.org/kyber/data/kyber-specification-round3.pdf +package kyber768 + +import ( + "bytes" + "crypto/subtle" + "io" + + cryptoRand "crypto/rand" + "github.com/cloudflare/circl/internal/sha3" + "github.com/cloudflare/circl/kem" + cpapke "github.com/cloudflare/circl/pke/kyber/kyber768" +) + +const ( + // Size of seed for NewKeyFromSeed + KeySeedSize = cpapke.KeySeedSize + 32 + + // Size of seed for EncapsulateTo. + EncapsulationSeedSize = 32 + + // Size of the established shared key. + SharedKeySize = 32 + + // Size of the encapsulated shared key. + CiphertextSize = cpapke.CiphertextSize + + // Size of a packed public key. + PublicKeySize = cpapke.PublicKeySize + + // Size of a packed private key. + PrivateKeySize = cpapke.PrivateKeySize + cpapke.PublicKeySize + 64 +) + +// Type of a Kyber768.CCAKEM public key +type PublicKey struct { + pk *cpapke.PublicKey + + hpk [32]byte // H(pk) +} + +// Type of a Kyber768.CCAKEM private key +type PrivateKey struct { + sk *cpapke.PrivateKey + pk *cpapke.PublicKey + hpk [32]byte // H(pk) + z [32]byte +} + +// NewKeyFromSeed derives a public/private keypair deterministically +// from the given seed. +// +// Panics if seed is not of length KeySeedSize. +func NewKeyFromSeed(seed []byte) (*PublicKey, *PrivateKey) { + var sk PrivateKey + var pk PublicKey + + if len(seed) != KeySeedSize { + panic("seed must be of length KeySeedSize") + } + + pk.pk, sk.sk = cpapke.NewKeyFromSeed(seed[:cpapke.KeySeedSize]) + sk.pk = pk.pk + copy(sk.z[:], seed[cpapke.KeySeedSize:]) + + // Compute H(pk) + var ppk [cpapke.PublicKeySize]byte + sk.pk.Pack(ppk[:]) + h := sha3.New256() + h.Write(ppk[:]) + h.Read(sk.hpk[:]) + copy(pk.hpk[:], sk.hpk[:]) + + return &pk, &sk +} + +// GenerateKeyPair generates public and private keys using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKeyPair(rand io.Reader) (*PublicKey, *PrivateKey, error) { + var seed [KeySeedSize]byte + if rand == nil { + rand = cryptoRand.Reader + } + _, err := io.ReadFull(rand, seed[:]) + if err != nil { + return nil, nil, err + } + pk, sk := NewKeyFromSeed(seed[:]) + return pk, sk, nil +} + +// EncapsulateTo generates a shared key and ciphertext that contains it +// for the public key using randomness from seed and writes the shared key +// to ss and ciphertext to ct. +// +// Panics if ss, ct or seed are not of length SharedKeySize, CiphertextSize +// and EncapsulationSeedSize respectively. +// +// seed may be nil, in which case crypto/rand.Reader is used to generate one. +func (pk *PublicKey) EncapsulateTo(ct, ss []byte, seed []byte) { + if seed == nil { + seed = make([]byte, EncapsulationSeedSize) + if _, err := cryptoRand.Read(seed[:]); err != nil { + panic(err) + } + } else { + if len(seed) != EncapsulationSeedSize { + panic("seed must be of length EncapsulationSeedSize") + } + } + + if len(ct) != CiphertextSize { + panic("ct must be of length CiphertextSize") + } + + if len(ss) != SharedKeySize { + panic("ss must be of length SharedKeySize") + } + + var m [32]byte + // m = H(seed), the hash of shame + h := sha3.New256() + h.Write(seed) + h.Read(m[:]) + + // (K', r) = G(m ‖ H(pk)) + var kr [64]byte + g := sha3.New512() + g.Write(m[:]) + g.Write(pk.hpk[:]) + g.Read(kr[:]) + + // c = Kyber.CPAPKE.Enc(pk, m, r) + pk.pk.EncryptTo(ct, m[:], kr[32:]) + + // Compute H(c) and put in second slot of kr, which will be (K', H(c)). + h.Reset() + h.Write(ct[:CiphertextSize]) + h.Read(kr[32:]) + + // K = KDF(K' ‖ H(c)) + kdf := sha3.NewShake256() + kdf.Write(kr[:]) + kdf.Read(ss[:SharedKeySize]) +} + +// DecapsulateTo computes the shared key which is encapsulated in ct +// for the private key. +// +// Panics if ct or ss are not of length CiphertextSize and SharedKeySize +// respectively. +func (sk *PrivateKey) DecapsulateTo(ss, ct []byte) { + if len(ct) != CiphertextSize { + panic("ct must be of length CiphertextSize") + } + + if len(ss) != SharedKeySize { + panic("ss must be of length SharedKeySize") + } + + // m' = Kyber.CPAPKE.Dec(sk, ct) + var m2 [32]byte + sk.sk.DecryptTo(m2[:], ct) + + // (K'', r') = G(m' ‖ H(pk)) + var kr2 [64]byte + g := sha3.New512() + g.Write(m2[:]) + g.Write(sk.hpk[:]) + g.Read(kr2[:]) + + // c' = Kyber.CPAPKE.Enc(pk, m', r') + var ct2 [CiphertextSize]byte + sk.pk.EncryptTo(ct2[:], m2[:], kr2[32:]) + + // Compute H(c) and put in second slot of kr2, which will be (K'', H(c)). + h := sha3.New256() + h.Write(ct[:CiphertextSize]) + h.Read(kr2[32:]) + + // Replace K'' by z in the first slot of kr2 if c ≠ c'. + subtle.ConstantTimeCopy( + 1-subtle.ConstantTimeCompare(ct, ct2[:]), + kr2[:32], + sk.z[:], + ) + + // K = KDF(K''/z, H(c)) + kdf := sha3.NewShake256() + kdf.Write(kr2[:]) + kdf.Read(ss) +} + +// Packs sk to buf. +// +// Panics if buf is not of size PrivateKeySize. +func (sk *PrivateKey) Pack(buf []byte) { + if len(buf) != PrivateKeySize { + panic("buf must be of length PrivateKeySize") + } + + sk.sk.Pack(buf[:cpapke.PrivateKeySize]) + buf = buf[cpapke.PrivateKeySize:] + sk.pk.Pack(buf[:cpapke.PublicKeySize]) + buf = buf[cpapke.PublicKeySize:] + copy(buf, sk.hpk[:]) + buf = buf[32:] + copy(buf, sk.z[:]) +} + +// Unpacks sk from buf. +// +// Panics if buf is not of size PrivateKeySize. +func (sk *PrivateKey) Unpack(buf []byte) { + if len(buf) != PrivateKeySize { + panic("buf must be of length PrivateKeySize") + } + + sk.sk = new(cpapke.PrivateKey) + sk.sk.Unpack(buf[:cpapke.PrivateKeySize]) + buf = buf[cpapke.PrivateKeySize:] + sk.pk = new(cpapke.PublicKey) + sk.pk.Unpack(buf[:cpapke.PublicKeySize]) + buf = buf[cpapke.PublicKeySize:] + copy(sk.hpk[:], buf[:32]) + copy(sk.z[:], buf[32:]) +} + +// Packs pk to buf. +// +// Panics if buf is not of size PublicKeySize. +func (pk *PublicKey) Pack(buf []byte) { + if len(buf) != PublicKeySize { + panic("buf must be of length PublicKeySize") + } + + pk.pk.Pack(buf) +} + +// Unpacks pk from buf. +// +// Panics if buf is not of size PublicKeySize. +func (pk *PublicKey) Unpack(buf []byte) { + if len(buf) != PublicKeySize { + panic("buf must be of length PublicKeySize") + } + + pk.pk = new(cpapke.PublicKey) + pk.pk.Unpack(buf) + + // Compute cached H(pk) + h := sha3.New256() + h.Write(buf) + h.Read(pk.hpk[:]) + +} + +// Boilerplate down below for the KEM scheme API. + +type scheme struct{} + +var sch kem.Scheme = &scheme{} + +// Scheme returns a KEM interface. +func Scheme() kem.Scheme { return sch } + +func (*scheme) Name() string { return "Kyber768" } +func (*scheme) PublicKeySize() int { return PublicKeySize } +func (*scheme) PrivateKeySize() int { return PrivateKeySize } +func (*scheme) SeedSize() int { return KeySeedSize } +func (*scheme) SharedKeySize() int { return SharedKeySize } +func (*scheme) CiphertextSize() int { return CiphertextSize } +func (*scheme) EncapsulationSeedSize() int { return EncapsulationSeedSize } + +func (sk *PrivateKey) Scheme() kem.Scheme { return sch } +func (pk *PublicKey) Scheme() kem.Scheme { return sch } + +func (sk *PrivateKey) MarshalBinary() ([]byte, error) { + var ret [PrivateKeySize]byte + sk.Pack(ret[:]) + return ret[:], nil +} + +func (sk *PrivateKey) Equal(other kem.PrivateKey) bool { + oth, ok := other.(*PrivateKey) + if !ok { + return false + } + if sk.pk == nil && oth.pk == nil { + return true + } + if sk.pk == nil || oth.pk == nil { + return false + } + if !bytes.Equal(sk.hpk[:], oth.hpk[:]) || + subtle.ConstantTimeCompare(sk.z[:], oth.z[:]) != 1 { + return false + } + return sk.sk.Equal(oth.sk) +} + +func (pk *PublicKey) Equal(other kem.PublicKey) bool { + oth, ok := other.(*PublicKey) + if !ok { + return false + } + if pk.pk == nil && oth.pk == nil { + return true + } + if pk.pk == nil || oth.pk == nil { + return false + } + return bytes.Equal(pk.hpk[:], oth.hpk[:]) +} + +func (sk *PrivateKey) Public() kem.PublicKey { + pk := new(PublicKey) + pk.pk = sk.pk + copy(pk.hpk[:], sk.hpk[:]) + return pk +} + +func (pk *PublicKey) MarshalBinary() ([]byte, error) { + var ret [PublicKeySize]byte + pk.Pack(ret[:]) + return ret[:], nil +} + +func (*scheme) GenerateKeyPair() (kem.PublicKey, kem.PrivateKey, error) { + return GenerateKeyPair(cryptoRand.Reader) +} + +func (*scheme) DeriveKeyPair(seed []byte) (kem.PublicKey, kem.PrivateKey) { + if len(seed) != KeySeedSize { + panic(kem.ErrSeedSize) + } + return NewKeyFromSeed(seed[:]) +} + +func (*scheme) Encapsulate(pk kem.PublicKey) (ct, ss []byte, err error) { + ct = make([]byte, CiphertextSize) + ss = make([]byte, SharedKeySize) + + pub, ok := pk.(*PublicKey) + if !ok { + return nil, nil, kem.ErrTypeMismatch + } + pub.EncapsulateTo(ct, ss, nil) + return +} + +func (*scheme) EncapsulateDeterministically(pk kem.PublicKey, seed []byte) ( + ct, ss []byte, err error) { + if len(seed) != EncapsulationSeedSize { + return nil, nil, kem.ErrSeedSize + } + + ct = make([]byte, CiphertextSize) + ss = make([]byte, SharedKeySize) + + pub, ok := pk.(*PublicKey) + if !ok { + return nil, nil, kem.ErrTypeMismatch + } + pub.EncapsulateTo(ct, ss, seed) + return +} + +func (*scheme) Decapsulate(sk kem.PrivateKey, ct []byte) ([]byte, error) { + if len(ct) != CiphertextSize { + return nil, kem.ErrCiphertextSize + } + + priv, ok := sk.(*PrivateKey) + if !ok { + return nil, kem.ErrTypeMismatch + } + ss := make([]byte, SharedKeySize) + priv.DecapsulateTo(ss, ct) + return ss, nil +} + +func (*scheme) UnmarshalBinaryPublicKey(buf []byte) (kem.PublicKey, error) { + var ret PublicKey + if len(buf) != PublicKeySize { + return nil, kem.ErrPubKeySize + } + ret.Unpack(buf) + return &ret, nil +} + +func (*scheme) UnmarshalBinaryPrivateKey(buf []byte) (kem.PrivateKey, error) { + if len(buf) != PrivateKeySize { + return nil, kem.ErrPrivKeySize + } + var ret PrivateKey + ret.Unpack(buf) + return &ret, nil +} diff --git a/backend/vendor/github.com/cloudflare/circl/kem/mlkem/mlkem768/kyber.go b/backend/vendor/github.com/cloudflare/circl/kem/mlkem/mlkem768/kyber.go new file mode 100644 index 0000000..afa4831 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/kem/mlkem/mlkem768/kyber.go @@ -0,0 +1,407 @@ +// Code generated from pkg.templ.go. DO NOT EDIT. + +// Package mlkem768 implements the IND-CCA2 secure key encapsulation mechanism +// ML-KEM-768 as defined in FIPS203. +package mlkem768 + +import ( + "bytes" + "crypto/subtle" + "io" + + cryptoRand "crypto/rand" + "github.com/cloudflare/circl/internal/sha3" + "github.com/cloudflare/circl/kem" + cpapke "github.com/cloudflare/circl/pke/kyber/kyber768" +) + +const ( + // Size of seed for NewKeyFromSeed + KeySeedSize = cpapke.KeySeedSize + 32 + + // Size of seed for EncapsulateTo. + EncapsulationSeedSize = 32 + + // Size of the established shared key. + SharedKeySize = 32 + + // Size of the encapsulated shared key. + CiphertextSize = cpapke.CiphertextSize + + // Size of a packed public key. + PublicKeySize = cpapke.PublicKeySize + + // Size of a packed private key. + PrivateKeySize = cpapke.PrivateKeySize + cpapke.PublicKeySize + 64 +) + +// Type of a ML-KEM-768 public key +type PublicKey struct { + pk *cpapke.PublicKey + + hpk [32]byte // H(pk) +} + +// Type of a ML-KEM-768 private key +type PrivateKey struct { + sk *cpapke.PrivateKey + pk *cpapke.PublicKey + hpk [32]byte // H(pk) + z [32]byte +} + +// NewKeyFromSeed derives a public/private keypair deterministically +// from the given seed. +// +// Panics if seed is not of length KeySeedSize. +func NewKeyFromSeed(seed []byte) (*PublicKey, *PrivateKey) { + var sk PrivateKey + var pk PublicKey + + if len(seed) != KeySeedSize { + panic("seed must be of length KeySeedSize") + } + + pk.pk, sk.sk = cpapke.NewKeyFromSeedMLKEM(seed[:cpapke.KeySeedSize]) + sk.pk = pk.pk + copy(sk.z[:], seed[cpapke.KeySeedSize:]) + + // Compute H(pk) + var ppk [cpapke.PublicKeySize]byte + sk.pk.Pack(ppk[:]) + h := sha3.New256() + h.Write(ppk[:]) + h.Read(sk.hpk[:]) + copy(pk.hpk[:], sk.hpk[:]) + + return &pk, &sk +} + +// GenerateKeyPair generates public and private keys using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKeyPair(rand io.Reader) (*PublicKey, *PrivateKey, error) { + var seed [KeySeedSize]byte + if rand == nil { + rand = cryptoRand.Reader + } + _, err := io.ReadFull(rand, seed[:]) + if err != nil { + return nil, nil, err + } + pk, sk := NewKeyFromSeed(seed[:]) + return pk, sk, nil +} + +// EncapsulateTo generates a shared key and ciphertext that contains it +// for the public key using randomness from seed and writes the shared key +// to ss and ciphertext to ct. +// +// Panics if ss, ct or seed are not of length SharedKeySize, CiphertextSize +// and EncapsulationSeedSize respectively. +// +// seed may be nil, in which case crypto/rand.Reader is used to generate one. +func (pk *PublicKey) EncapsulateTo(ct, ss []byte, seed []byte) { + if seed == nil { + seed = make([]byte, EncapsulationSeedSize) + if _, err := cryptoRand.Read(seed[:]); err != nil { + panic(err) + } + } else { + if len(seed) != EncapsulationSeedSize { + panic("seed must be of length EncapsulationSeedSize") + } + } + + if len(ct) != CiphertextSize { + panic("ct must be of length CiphertextSize") + } + + if len(ss) != SharedKeySize { + panic("ss must be of length SharedKeySize") + } + + var m [32]byte + copy(m[:], seed) + + // (K', r) = G(m ‖ H(pk)) + var kr [64]byte + g := sha3.New512() + g.Write(m[:]) + g.Write(pk.hpk[:]) + g.Read(kr[:]) + + // c = Kyber.CPAPKE.Enc(pk, m, r) + pk.pk.EncryptTo(ct, m[:], kr[32:]) + + copy(ss, kr[:SharedKeySize]) +} + +// DecapsulateTo computes the shared key which is encapsulated in ct +// for the private key. +// +// Panics if ct or ss are not of length CiphertextSize and SharedKeySize +// respectively. +func (sk *PrivateKey) DecapsulateTo(ss, ct []byte) { + if len(ct) != CiphertextSize { + panic("ct must be of length CiphertextSize") + } + + if len(ss) != SharedKeySize { + panic("ss must be of length SharedKeySize") + } + + // m' = Kyber.CPAPKE.Dec(sk, ct) + var m2 [32]byte + sk.sk.DecryptTo(m2[:], ct) + + // (K'', r') = G(m' ‖ H(pk)) + var kr2 [64]byte + g := sha3.New512() + g.Write(m2[:]) + g.Write(sk.hpk[:]) + g.Read(kr2[:]) + + // c' = Kyber.CPAPKE.Enc(pk, m', r') + var ct2 [CiphertextSize]byte + sk.pk.EncryptTo(ct2[:], m2[:], kr2[32:]) + + var ss2 [SharedKeySize]byte + + // Compute shared secret in case of rejection: ss₂ = PRF(z ‖ c) + prf := sha3.NewShake256() + prf.Write(sk.z[:]) + prf.Write(ct[:CiphertextSize]) + prf.Read(ss2[:]) + + // Set ss2 to the real shared secret if c = c'. + subtle.ConstantTimeCopy( + subtle.ConstantTimeCompare(ct, ct2[:]), + ss2[:], + kr2[:SharedKeySize], + ) + + copy(ss, ss2[:]) +} + +// Packs sk to buf. +// +// Panics if buf is not of size PrivateKeySize. +func (sk *PrivateKey) Pack(buf []byte) { + if len(buf) != PrivateKeySize { + panic("buf must be of length PrivateKeySize") + } + + sk.sk.Pack(buf[:cpapke.PrivateKeySize]) + buf = buf[cpapke.PrivateKeySize:] + sk.pk.Pack(buf[:cpapke.PublicKeySize]) + buf = buf[cpapke.PublicKeySize:] + copy(buf, sk.hpk[:]) + buf = buf[32:] + copy(buf, sk.z[:]) +} + +// Unpacks sk from buf. +// +// Panics if buf is not of size PrivateKeySize. +// +// Returns an error if buf is not of size PrivateKeySize, or private key +// doesn't pass the ML-KEM decapsulation key check. +func (sk *PrivateKey) Unpack(buf []byte) error { + if len(buf) != PrivateKeySize { + return kem.ErrPrivKeySize + } + + sk.sk = new(cpapke.PrivateKey) + sk.sk.Unpack(buf[:cpapke.PrivateKeySize]) + buf = buf[cpapke.PrivateKeySize:] + sk.pk = new(cpapke.PublicKey) + sk.pk.Unpack(buf[:cpapke.PublicKeySize]) + var hpk [32]byte + h := sha3.New256() + h.Write(buf[:cpapke.PublicKeySize]) + h.Read(hpk[:]) + buf = buf[cpapke.PublicKeySize:] + copy(sk.hpk[:], buf[:32]) + copy(sk.z[:], buf[32:]) + if !bytes.Equal(hpk[:], sk.hpk[:]) { + return kem.ErrPrivKey + } + return nil +} + +// Packs pk to buf. +// +// Panics if buf is not of size PublicKeySize. +func (pk *PublicKey) Pack(buf []byte) { + if len(buf) != PublicKeySize { + panic("buf must be of length PublicKeySize") + } + + pk.pk.Pack(buf) +} + +// Unpacks pk from buf. +// +// Returns an error if buf is not of size PublicKeySize, or the public key +// is not normalized. +func (pk *PublicKey) Unpack(buf []byte) error { + if len(buf) != PublicKeySize { + return kem.ErrPubKeySize + } + + pk.pk = new(cpapke.PublicKey) + if err := pk.pk.UnpackMLKEM(buf); err != nil { + return err + } + + // Compute cached H(pk) + h := sha3.New256() + h.Write(buf) + h.Read(pk.hpk[:]) + + return nil +} + +// Boilerplate down below for the KEM scheme API. + +type scheme struct{} + +var sch kem.Scheme = &scheme{} + +// Scheme returns a KEM interface. +func Scheme() kem.Scheme { return sch } + +func (*scheme) Name() string { return "ML-KEM-768" } +func (*scheme) PublicKeySize() int { return PublicKeySize } +func (*scheme) PrivateKeySize() int { return PrivateKeySize } +func (*scheme) SeedSize() int { return KeySeedSize } +func (*scheme) SharedKeySize() int { return SharedKeySize } +func (*scheme) CiphertextSize() int { return CiphertextSize } +func (*scheme) EncapsulationSeedSize() int { return EncapsulationSeedSize } + +func (sk *PrivateKey) Scheme() kem.Scheme { return sch } +func (pk *PublicKey) Scheme() kem.Scheme { return sch } + +func (sk *PrivateKey) MarshalBinary() ([]byte, error) { + var ret [PrivateKeySize]byte + sk.Pack(ret[:]) + return ret[:], nil +} + +func (sk *PrivateKey) Equal(other kem.PrivateKey) bool { + oth, ok := other.(*PrivateKey) + if !ok { + return false + } + if sk.pk == nil && oth.pk == nil { + return true + } + if sk.pk == nil || oth.pk == nil { + return false + } + if !bytes.Equal(sk.hpk[:], oth.hpk[:]) || + subtle.ConstantTimeCompare(sk.z[:], oth.z[:]) != 1 { + return false + } + return sk.sk.Equal(oth.sk) +} + +func (pk *PublicKey) Equal(other kem.PublicKey) bool { + oth, ok := other.(*PublicKey) + if !ok { + return false + } + if pk.pk == nil && oth.pk == nil { + return true + } + if pk.pk == nil || oth.pk == nil { + return false + } + return bytes.Equal(pk.hpk[:], oth.hpk[:]) +} + +func (sk *PrivateKey) Public() kem.PublicKey { + pk := new(PublicKey) + pk.pk = sk.pk + copy(pk.hpk[:], sk.hpk[:]) + return pk +} + +func (pk *PublicKey) MarshalBinary() ([]byte, error) { + var ret [PublicKeySize]byte + pk.Pack(ret[:]) + return ret[:], nil +} + +func (*scheme) GenerateKeyPair() (kem.PublicKey, kem.PrivateKey, error) { + return GenerateKeyPair(cryptoRand.Reader) +} + +func (*scheme) DeriveKeyPair(seed []byte) (kem.PublicKey, kem.PrivateKey) { + if len(seed) != KeySeedSize { + panic(kem.ErrSeedSize) + } + return NewKeyFromSeed(seed[:]) +} + +func (*scheme) Encapsulate(pk kem.PublicKey) (ct, ss []byte, err error) { + ct = make([]byte, CiphertextSize) + ss = make([]byte, SharedKeySize) + + pub, ok := pk.(*PublicKey) + if !ok { + return nil, nil, kem.ErrTypeMismatch + } + pub.EncapsulateTo(ct, ss, nil) + return +} + +func (*scheme) EncapsulateDeterministically(pk kem.PublicKey, seed []byte) ( + ct, ss []byte, err error) { + if len(seed) != EncapsulationSeedSize { + return nil, nil, kem.ErrSeedSize + } + + ct = make([]byte, CiphertextSize) + ss = make([]byte, SharedKeySize) + + pub, ok := pk.(*PublicKey) + if !ok { + return nil, nil, kem.ErrTypeMismatch + } + pub.EncapsulateTo(ct, ss, seed) + return +} + +func (*scheme) Decapsulate(sk kem.PrivateKey, ct []byte) ([]byte, error) { + if len(ct) != CiphertextSize { + return nil, kem.ErrCiphertextSize + } + + priv, ok := sk.(*PrivateKey) + if !ok { + return nil, kem.ErrTypeMismatch + } + ss := make([]byte, SharedKeySize) + priv.DecapsulateTo(ss, ct) + return ss, nil +} + +func (*scheme) UnmarshalBinaryPublicKey(buf []byte) (kem.PublicKey, error) { + var ret PublicKey + if err := ret.Unpack(buf); err != nil { + return nil, err + } + return &ret, nil +} + +func (*scheme) UnmarshalBinaryPrivateKey(buf []byte) (kem.PrivateKey, error) { + if len(buf) != PrivateKeySize { + return nil, kem.ErrPrivKeySize + } + var ret PrivateKey + if err := ret.Unpack(buf); err != nil { + return nil, err + } + return &ret, nil +} diff --git a/backend/vendor/github.com/cloudflare/circl/kem/xwing/scheme.go b/backend/vendor/github.com/cloudflare/circl/kem/xwing/scheme.go new file mode 100644 index 0000000..6c01477 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/kem/xwing/scheme.go @@ -0,0 +1,140 @@ +package xwing + +import ( + "bytes" + cryptoRand "crypto/rand" + "crypto/subtle" + + "github.com/cloudflare/circl/kem" + "github.com/cloudflare/circl/kem/mlkem/mlkem768" +) + +// This file contains the boilerplate code to connect X-Wing to the +// generic KEM API. + +// Returns the generic KEM interface for X-Wing PQ/T hybrid KEM. +func Scheme() kem.Scheme { return scheme{} } + +type scheme struct{} + +func (scheme) Name() string { return "X-Wing" } +func (scheme) PublicKeySize() int { return PublicKeySize } +func (scheme) PrivateKeySize() int { return PrivateKeySize } +func (scheme) SeedSize() int { return SeedSize } +func (scheme) EncapsulationSeedSize() int { return EncapsulationSeedSize } +func (scheme) SharedKeySize() int { return SharedKeySize } +func (scheme) CiphertextSize() int { return CiphertextSize } +func (*PrivateKey) Scheme() kem.Scheme { return scheme{} } +func (*PublicKey) Scheme() kem.Scheme { return scheme{} } + +func (sch scheme) Encapsulate(pk kem.PublicKey) (ct, ss []byte, err error) { + var seed [EncapsulationSeedSize]byte + _, err = cryptoRand.Read(seed[:]) + if err != nil { + return + } + return sch.EncapsulateDeterministically(pk, seed[:]) +} + +func (scheme) EncapsulateDeterministically( + pk kem.PublicKey, seed []byte, +) ([]byte, []byte, error) { + if len(seed) != EncapsulationSeedSize { + return nil, nil, kem.ErrSeedSize + } + pub, ok := pk.(*PublicKey) + if !ok { + return nil, nil, kem.ErrTypeMismatch + } + var ( + ct [CiphertextSize]byte + ss [SharedKeySize]byte + ) + pub.EncapsulateTo(ct[:], ss[:], seed) + return ct[:], ss[:], nil +} + +func (scheme) UnmarshalBinaryPublicKey(buf []byte) (kem.PublicKey, error) { + var pk PublicKey + if len(buf) != PublicKeySize { + return nil, kem.ErrPubKeySize + } + + if err := pk.Unpack(buf); err != nil { + return nil, err + } + return &pk, nil +} + +func (scheme) UnmarshalBinaryPrivateKey(buf []byte) (kem.PrivateKey, error) { + var sk PrivateKey + if len(buf) != PrivateKeySize { + return nil, kem.ErrPrivKeySize + } + + sk.Unpack(buf) + return &sk, nil +} + +func (sk *PrivateKey) MarshalBinary() ([]byte, error) { + var ret [PrivateKeySize]byte + sk.Pack(ret[:]) + return ret[:], nil +} + +func (sk *PrivateKey) Equal(other kem.PrivateKey) bool { + oth, ok := other.(*PrivateKey) + if !ok { + return false + } + return sk.m.Equal(&oth.m) && + subtle.ConstantTimeCompare(oth.x[:], sk.x[:]) == 1 +} + +func (sk *PrivateKey) Public() kem.PublicKey { + var pk PublicKey + pk.m = *(sk.m.Public().(*mlkem768.PublicKey)) + pk.x = sk.xpk + return &pk +} + +func (pk *PublicKey) Equal(other kem.PublicKey) bool { + oth, ok := other.(*PublicKey) + if !ok { + return false + } + return pk.m.Equal(&oth.m) && bytes.Equal(pk.x[:], oth.x[:]) +} + +func (pk *PublicKey) MarshalBinary() ([]byte, error) { + var ret [PublicKeySize]byte + pk.Pack(ret[:]) + return ret[:], nil +} + +func (scheme) DeriveKeyPair(seed []byte) (kem.PublicKey, kem.PrivateKey) { + sk, pk := DeriveKeyPair(seed) + return pk, sk +} + +func (scheme) GenerateKeyPair() (kem.PublicKey, kem.PrivateKey, error) { + sk, pk, err := GenerateKeyPair(nil) + return pk, sk, err +} + +func (scheme) Decapsulate(sk kem.PrivateKey, ct []byte) ([]byte, error) { + if len(ct) != CiphertextSize { + return nil, kem.ErrCiphertextSize + } + + var ss [SharedKeySize]byte + + priv, ok := sk.(*PrivateKey) + if !ok { + return nil, kem.ErrTypeMismatch + } + + priv.DecapsulateTo(ss[:], ct[:]) + + return ss[:], nil +} diff --git a/backend/vendor/github.com/cloudflare/circl/kem/xwing/xwing.go b/backend/vendor/github.com/cloudflare/circl/kem/xwing/xwing.go new file mode 100644 index 0000000..e882d50 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/kem/xwing/xwing.go @@ -0,0 +1,316 @@ +// Package xwing implements the X-Wing PQ/T hybrid KEM +// +// https://datatracker.ietf.org/doc/draft-connolly-cfrg-xwing-kem +// +// Implements the final version (-05). +package xwing + +import ( + cryptoRand "crypto/rand" + "errors" + "io" + + "github.com/cloudflare/circl/dh/x25519" + "github.com/cloudflare/circl/internal/sha3" + "github.com/cloudflare/circl/kem" + "github.com/cloudflare/circl/kem/mlkem/mlkem768" +) + +// An X-Wing private key. +type PrivateKey struct { + seed [32]byte + m mlkem768.PrivateKey + x x25519.Key + xpk x25519.Key +} + +// An X-Wing public key. +type PublicKey struct { + m mlkem768.PublicKey + x x25519.Key +} + +const ( + // Size of a seed of a keypair + SeedSize = 32 + + // Size of an X-Wing public key + PublicKeySize = 1216 + + // Size of an X-Wing private key + PrivateKeySize = 32 + + // Size of the seed passed to EncapsulateTo + EncapsulationSeedSize = 64 + + // Size of the established shared key + SharedKeySize = 32 + + // Size of an X-Wing ciphertext. + CiphertextSize = 1120 +) + +func combiner( + out []byte, + ssm *[mlkem768.SharedKeySize]byte, + ssx *x25519.Key, + ctx *x25519.Key, + pkx *x25519.Key, +) { + h := sha3.New256() + _, _ = h.Write(ssm[:]) + _, _ = h.Write(ssx[:]) + _, _ = h.Write(ctx[:]) + _, _ = h.Write(pkx[:]) + + // \./ + // /^\ + _, _ = h.Write([]byte(`\.//^\`)) + + _, _ = h.Read(out[:]) +} + +// Packs sk to buf. +// +// Panics if buf is not of size PrivateKeySize +func (sk *PrivateKey) Pack(buf []byte) { + if len(buf) != PrivateKeySize { + panic(kem.ErrPrivKeySize) + } + copy(buf, sk.seed[:]) +} + +// Packs pk to buf. +// +// Panics if buf is not of size PublicKeySize. +func (pk *PublicKey) Pack(buf []byte) { + if len(buf) != PublicKeySize { + panic(kem.ErrPubKeySize) + } + pk.m.Pack(buf[:mlkem768.PublicKeySize]) + copy(buf[mlkem768.PublicKeySize:], pk.x[:]) +} + +// DeriveKeyPair derives a public/private keypair deterministically +// from the given seed. +// +// Panics if seed is not of length SeedSize. +func DeriveKeyPair(seed []byte) (*PrivateKey, *PublicKey) { + var ( + sk PrivateKey + pk PublicKey + ) + + deriveKeyPair(seed, &sk, &pk) + + return &sk, &pk +} + +func deriveKeyPair(seed []byte, sk *PrivateKey, pk *PublicKey) { + if len(seed) != SeedSize { + panic(kem.ErrSeedSize) + } + + var seedm [mlkem768.KeySeedSize]byte + + copy(sk.seed[:], seed) + + h := sha3.NewShake256() + _, _ = h.Write(seed) + _, _ = h.Read(seedm[:]) + _, _ = h.Read(sk.x[:]) + + pkm, skm := mlkem768.NewKeyFromSeed(seedm[:]) + sk.m = *skm + pk.m = *pkm + + x25519.KeyGen(&pk.x, &sk.x) + sk.xpk = pk.x +} + +// DeriveKeyPairPacked derives a keypair like DeriveKeyPair, and +// returns them packed. +func DeriveKeyPairPacked(seed []byte) ([]byte, []byte) { + sk, pk := DeriveKeyPair(seed) + var ( + ppk [PublicKeySize]byte + psk [PrivateKeySize]byte + ) + pk.Pack(ppk[:]) + sk.Pack(psk[:]) + return psk[:], ppk[:] +} + +// GenerateKeyPair generates public and private keys using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKeyPair(rand io.Reader) (*PrivateKey, *PublicKey, error) { + var seed [SeedSize]byte + if rand == nil { + rand = cryptoRand.Reader + } + _, err := io.ReadFull(rand, seed[:]) + if err != nil { + return nil, nil, err + } + sk, pk := DeriveKeyPair(seed[:]) + return sk, pk, nil +} + +// GenerateKeyPairPacked generates a keypair like GenerateKeyPair, and +// returns them packed. +func GenerateKeyPairPacked(rand io.Reader) ([]byte, []byte, error) { + sk, pk, err := GenerateKeyPair(rand) + if err != nil { + return nil, nil, err + } + var ( + ppk [PublicKeySize]byte + psk [PrivateKeySize]byte + ) + pk.Pack(ppk[:]) + sk.Pack(psk[:]) + return psk[:], ppk[:], nil +} + +// Encapsulate generates a shared key and ciphertext that contains it +// for the public key pk using randomness from seed. +// +// seed may be nil, in which case crypto/rand.Reader is used. +// +// Warning: note that the order of the returned ss and ct matches the +// X-Wing standard, which is the reverse of the Circl KEM API. +// +// Returns ErrPubKey if ML-KEM encapsulation key check fails. +// +// Panics if pk is not of size PublicKeySize, or randomness could not +// be read from crypto/rand.Reader. +func Encapsulate(pk, seed []byte) (ss, ct []byte, err error) { + var pub PublicKey + if err := pub.Unpack(pk); err != nil { + return nil, nil, err + } + ct = make([]byte, CiphertextSize) + ss = make([]byte, SharedKeySize) + pub.EncapsulateTo(ct, ss, seed) + return ss, ct, nil +} + +// Decapsulate computes the shared key which is encapsulated in ct +// for the private key sk. +// +// Panics if sk or ct are not of length PrivateKeySize and CiphertextSize +// respectively. +func Decapsulate(ct, sk []byte) (ss []byte) { + var priv PrivateKey + priv.Unpack(sk) + ss = make([]byte, SharedKeySize) + priv.DecapsulateTo(ss, ct) + return ss +} + +// Raised when passing a byte slice of the wrong size for the shared +// secret to the EncapsulateTo or DecapsulateTo functions. +var ErrSharedKeySize = errors.New("wrong size for shared key") + +// EncapsulateTo generates a shared key and ciphertext that contains it +// for the public key using randomness from seed and writes the shared key +// to ss and ciphertext to ct. +// +// Panics if ss, ct or seed are not of length SharedKeySize, CiphertextSize +// and EncapsulationSeedSize respectively. +// +// seed may be nil, in which case crypto/rand.Reader is used to generate one. +func (pk *PublicKey) EncapsulateTo(ct, ss, seed []byte) { + if seed == nil { + seed = make([]byte, EncapsulationSeedSize) + if _, err := cryptoRand.Read(seed[:]); err != nil { + panic(err) + } + } else { + if len(seed) != EncapsulationSeedSize { + panic(kem.ErrSeedSize) + } + } + + if len(ct) != CiphertextSize { + panic(kem.ErrCiphertextSize) + } + + if len(ss) != SharedKeySize { + panic(ErrSharedKeySize) + } + + var ( + seedm [32]byte + ekx x25519.Key + ctx x25519.Key + ssx x25519.Key + ssm [mlkem768.SharedKeySize]byte + ) + + copy(seedm[:], seed[:32]) + copy(ekx[:], seed[32:]) + + x25519.KeyGen(&ctx, &ekx) + // A peer public key with low order points results in an all-zeroes + // shared secret. Ignored for now pending clarification in the spec, + // https://github.com/dconnolly/draft-connolly-cfrg-xwing-kem/issues/28 + x25519.Shared(&ssx, &ekx, &pk.x) + pk.m.EncapsulateTo(ct[:mlkem768.CiphertextSize], ssm[:], seedm[:]) + + combiner(ss, &ssm, &ssx, &ctx, &pk.x) + copy(ct[mlkem768.CiphertextSize:], ctx[:]) +} + +// DecapsulateTo computes the shared key which is encapsulated in ct +// for the private key. +// +// Panics if ct or ss are not of length CiphertextSize and SharedKeySize +// respectively. +func (sk *PrivateKey) DecapsulateTo(ss, ct []byte) { + if len(ct) != CiphertextSize { + panic(kem.ErrCiphertextSize) + } + if len(ss) != SharedKeySize { + panic(ErrSharedKeySize) + } + + ctm := ct[:mlkem768.CiphertextSize] + + var ( + ssm [mlkem768.SharedKeySize]byte + ssx x25519.Key + ctx x25519.Key + ) + + copy(ctx[:], ct[mlkem768.CiphertextSize:]) + + sk.m.DecapsulateTo(ssm[:], ctm) + // A peer public key with low order points results in an all-zeroes + // shared secret. Ignored for now pending clarification in the spec, + // https://github.com/dconnolly/draft-connolly-cfrg-xwing-kem/issues/28 + x25519.Shared(&ssx, &sk.x, &ctx) + combiner(ss, &ssm, &ssx, &ctx, &sk.xpk) +} + +// Unpacks pk from buf. +// +// Panics if buf is not of size PublicKeySize. +// +// Returns ErrPubKey if pk fails the ML-KEM encapsulation key check. +func (pk *PublicKey) Unpack(buf []byte) error { + if len(buf) != PublicKeySize { + panic(kem.ErrPubKeySize) + } + + copy(pk.x[:], buf[mlkem768.PublicKeySize:]) + return pk.m.Unpack(buf[:mlkem768.PublicKeySize]) +} + +// Unpacks sk from buf. +// +// Panics if buf is not of size PrivateKeySize. +func (sk *PrivateKey) Unpack(buf []byte) { + var pk PublicKey + deriveKeyPair(buf, sk, &pk) +} diff --git a/backend/vendor/github.com/cloudflare/circl/math/fp25519/fp.go b/backend/vendor/github.com/cloudflare/circl/math/fp25519/fp.go new file mode 100644 index 0000000..57a50ff --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/fp25519/fp.go @@ -0,0 +1,205 @@ +// Package fp25519 provides prime field arithmetic over GF(2^255-19). +package fp25519 + +import ( + "errors" + + "github.com/cloudflare/circl/internal/conv" +) + +// Size in bytes of an element. +const Size = 32 + +// Elt is a prime field element. +type Elt [Size]byte + +func (e Elt) String() string { return conv.BytesLe2Hex(e[:]) } + +// p is the prime modulus 2^255-19. +var p = Elt{ + 0xed, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f, +} + +// P returns the prime modulus 2^255-19. +func P() Elt { return p } + +// ToBytes stores in b the little-endian byte representation of x. +func ToBytes(b []byte, x *Elt) error { + if len(b) != Size { + return errors.New("wrong size") + } + Modp(x) + copy(b, x[:]) + return nil +} + +// IsZero returns true if x is equal to 0. +func IsZero(x *Elt) bool { Modp(x); return *x == Elt{} } + +// SetOne assigns x=1. +func SetOne(x *Elt) { *x = Elt{}; x[0] = 1 } + +// Neg calculates z = -x. +func Neg(z, x *Elt) { Sub(z, &p, x) } + +// InvSqrt calculates z = sqrt(x/y) iff x/y is a quadratic-residue, which is +// indicated by returning isQR = true. Otherwise, when x/y is a quadratic +// non-residue, z will have an undetermined value and isQR = false. +func InvSqrt(z, x, y *Elt) (isQR bool) { + sqrtMinusOne := &Elt{ + 0xb0, 0xa0, 0x0e, 0x4a, 0x27, 0x1b, 0xee, 0xc4, + 0x78, 0xe4, 0x2f, 0xad, 0x06, 0x18, 0x43, 0x2f, + 0xa7, 0xd7, 0xfb, 0x3d, 0x99, 0x00, 0x4d, 0x2b, + 0x0b, 0xdf, 0xc1, 0x4f, 0x80, 0x24, 0x83, 0x2b, + } + t0, t1, t2, t3 := &Elt{}, &Elt{}, &Elt{}, &Elt{} + + Mul(t0, x, y) // t0 = u*v + Sqr(t1, y) // t1 = v^2 + Mul(t2, t0, t1) // t2 = u*v^3 + Sqr(t0, t1) // t0 = v^4 + Mul(t1, t0, t2) // t1 = u*v^7 + + var Tab [4]*Elt + Tab[0] = &Elt{} + Tab[1] = &Elt{} + Tab[2] = t3 + Tab[3] = t1 + + *Tab[0] = *t1 + Sqr(Tab[0], Tab[0]) + Sqr(Tab[1], Tab[0]) + Sqr(Tab[1], Tab[1]) + Mul(Tab[1], Tab[1], Tab[3]) + Mul(Tab[0], Tab[0], Tab[1]) + Sqr(Tab[0], Tab[0]) + Mul(Tab[0], Tab[0], Tab[1]) + Sqr(Tab[1], Tab[0]) + for i := 0; i < 4; i++ { + Sqr(Tab[1], Tab[1]) + } + Mul(Tab[1], Tab[1], Tab[0]) + Sqr(Tab[2], Tab[1]) + for i := 0; i < 4; i++ { + Sqr(Tab[2], Tab[2]) + } + Mul(Tab[2], Tab[2], Tab[0]) + Sqr(Tab[1], Tab[2]) + for i := 0; i < 14; i++ { + Sqr(Tab[1], Tab[1]) + } + Mul(Tab[1], Tab[1], Tab[2]) + Sqr(Tab[2], Tab[1]) + for i := 0; i < 29; i++ { + Sqr(Tab[2], Tab[2]) + } + Mul(Tab[2], Tab[2], Tab[1]) + Sqr(Tab[1], Tab[2]) + for i := 0; i < 59; i++ { + Sqr(Tab[1], Tab[1]) + } + Mul(Tab[1], Tab[1], Tab[2]) + for i := 0; i < 5; i++ { + Sqr(Tab[1], Tab[1]) + } + Mul(Tab[1], Tab[1], Tab[0]) + Sqr(Tab[2], Tab[1]) + for i := 0; i < 124; i++ { + Sqr(Tab[2], Tab[2]) + } + Mul(Tab[2], Tab[2], Tab[1]) + Sqr(Tab[2], Tab[2]) + Sqr(Tab[2], Tab[2]) + Mul(Tab[2], Tab[2], Tab[3]) + + Mul(z, t3, t2) // z = xy^(p+3)/8 = xy^3*(xy^7)^(p-5)/8 + // Checking whether y z^2 == x + Sqr(t0, z) // t0 = z^2 + Mul(t0, t0, y) // t0 = yz^2 + Sub(t1, t0, x) // t1 = t0-u + Add(t2, t0, x) // t2 = t0+u + if IsZero(t1) { + return true + } else if IsZero(t2) { + Mul(z, z, sqrtMinusOne) // z = z*sqrt(-1) + return true + } else { + return false + } +} + +// Inv calculates z = 1/x mod p. +func Inv(z, x *Elt) { + x0, x1, x2 := &Elt{}, &Elt{}, &Elt{} + Sqr(x1, x) + Sqr(x0, x1) + Sqr(x0, x0) + Mul(x0, x0, x) + Mul(z, x0, x1) + Sqr(x1, z) + Mul(x0, x0, x1) + Sqr(x1, x0) + for i := 0; i < 4; i++ { + Sqr(x1, x1) + } + Mul(x0, x0, x1) + Sqr(x1, x0) + for i := 0; i < 9; i++ { + Sqr(x1, x1) + } + Mul(x1, x1, x0) + Sqr(x2, x1) + for i := 0; i < 19; i++ { + Sqr(x2, x2) + } + Mul(x2, x2, x1) + for i := 0; i < 10; i++ { + Sqr(x2, x2) + } + Mul(x2, x2, x0) + Sqr(x0, x2) + for i := 0; i < 49; i++ { + Sqr(x0, x0) + } + Mul(x0, x0, x2) + Sqr(x1, x0) + for i := 0; i < 99; i++ { + Sqr(x1, x1) + } + Mul(x1, x1, x0) + for i := 0; i < 50; i++ { + Sqr(x1, x1) + } + Mul(x1, x1, x2) + for i := 0; i < 5; i++ { + Sqr(x1, x1) + } + Mul(z, z, x1) +} + +// Cmov assigns y to x if n is 1. +func Cmov(x, y *Elt, n uint) { cmov(x, y, n) } + +// Cswap interchanges x and y if n is 1. +func Cswap(x, y *Elt, n uint) { cswap(x, y, n) } + +// Add calculates z = x+y mod p. +func Add(z, x, y *Elt) { add(z, x, y) } + +// Sub calculates z = x-y mod p. +func Sub(z, x, y *Elt) { sub(z, x, y) } + +// AddSub calculates (x,y) = (x+y mod p, x-y mod p). +func AddSub(x, y *Elt) { addsub(x, y) } + +// Mul calculates z = x*y mod p. +func Mul(z, x, y *Elt) { mul(z, x, y) } + +// Sqr calculates z = x^2 mod p. +func Sqr(z, x *Elt) { sqr(z, x) } + +// Modp ensures that z is between [0,p-1]. +func Modp(z *Elt) { modp(z) } diff --git a/backend/vendor/github.com/cloudflare/circl/math/fp25519/fp_amd64.go b/backend/vendor/github.com/cloudflare/circl/math/fp25519/fp_amd64.go new file mode 100644 index 0000000..057f0d2 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/fp25519/fp_amd64.go @@ -0,0 +1,45 @@ +//go:build amd64 && !purego +// +build amd64,!purego + +package fp25519 + +import ( + "golang.org/x/sys/cpu" +) + +var hasBmi2Adx = cpu.X86.HasBMI2 && cpu.X86.HasADX + +var _ = hasBmi2Adx + +func cmov(x, y *Elt, n uint) { cmovAmd64(x, y, n) } +func cswap(x, y *Elt, n uint) { cswapAmd64(x, y, n) } +func add(z, x, y *Elt) { addAmd64(z, x, y) } +func sub(z, x, y *Elt) { subAmd64(z, x, y) } +func addsub(x, y *Elt) { addsubAmd64(x, y) } +func mul(z, x, y *Elt) { mulAmd64(z, x, y) } +func sqr(z, x *Elt) { sqrAmd64(z, x) } +func modp(z *Elt) { modpAmd64(z) } + +//go:noescape +func cmovAmd64(x, y *Elt, n uint) + +//go:noescape +func cswapAmd64(x, y *Elt, n uint) + +//go:noescape +func addAmd64(z, x, y *Elt) + +//go:noescape +func subAmd64(z, x, y *Elt) + +//go:noescape +func addsubAmd64(x, y *Elt) + +//go:noescape +func mulAmd64(z, x, y *Elt) + +//go:noescape +func sqrAmd64(z, x *Elt) + +//go:noescape +func modpAmd64(z *Elt) diff --git a/backend/vendor/github.com/cloudflare/circl/math/fp25519/fp_amd64.h b/backend/vendor/github.com/cloudflare/circl/math/fp25519/fp_amd64.h new file mode 100644 index 0000000..b884b58 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/fp25519/fp_amd64.h @@ -0,0 +1,351 @@ +// This code was imported from https://github.com/armfazh/rfc7748_precomputed + +// CHECK_BMI2ADX triggers bmi2adx if supported, +// otherwise it fallbacks to legacy code. +#define CHECK_BMI2ADX(label, legacy, bmi2adx) \ + CMPB ·hasBmi2Adx(SB), $0 \ + JE label \ + bmi2adx \ + RET \ + label: \ + legacy \ + RET + +// cselect is a conditional move +// if b=1: it copies y into x; +// if b=0: x remains with the same value; +// if b<> 0,1: undefined. +// Uses: AX, DX, FLAGS +// Instr: x86_64, cmov +#define cselect(x,y,b) \ + TESTQ b, b \ + MOVQ 0+x, AX; MOVQ 0+y, DX; CMOVQNE DX, AX; MOVQ AX, 0+x; \ + MOVQ 8+x, AX; MOVQ 8+y, DX; CMOVQNE DX, AX; MOVQ AX, 8+x; \ + MOVQ 16+x, AX; MOVQ 16+y, DX; CMOVQNE DX, AX; MOVQ AX, 16+x; \ + MOVQ 24+x, AX; MOVQ 24+y, DX; CMOVQNE DX, AX; MOVQ AX, 24+x; + +// cswap is a conditional swap +// if b=1: x,y <- y,x; +// if b=0: x,y remain with the same values; +// if b<> 0,1: undefined. +// Uses: AX, DX, R8, FLAGS +// Instr: x86_64, cmov +#define cswap(x,y,b) \ + TESTQ b, b \ + MOVQ 0+x, AX; MOVQ AX, R8; MOVQ 0+y, DX; CMOVQNE DX, AX; CMOVQNE R8, DX; MOVQ AX, 0+x; MOVQ DX, 0+y; \ + MOVQ 8+x, AX; MOVQ AX, R8; MOVQ 8+y, DX; CMOVQNE DX, AX; CMOVQNE R8, DX; MOVQ AX, 8+x; MOVQ DX, 8+y; \ + MOVQ 16+x, AX; MOVQ AX, R8; MOVQ 16+y, DX; CMOVQNE DX, AX; CMOVQNE R8, DX; MOVQ AX, 16+x; MOVQ DX, 16+y; \ + MOVQ 24+x, AX; MOVQ AX, R8; MOVQ 24+y, DX; CMOVQNE DX, AX; CMOVQNE R8, DX; MOVQ AX, 24+x; MOVQ DX, 24+y; + +// additionLeg adds x and y and stores in z +// Uses: AX, DX, R8-R11, FLAGS +// Instr: x86_64, cmov +#define additionLeg(z,x,y) \ + MOVL $38, AX; \ + MOVL $0, DX; \ + MOVQ 0+x, R8; ADDQ 0+y, R8; \ + MOVQ 8+x, R9; ADCQ 8+y, R9; \ + MOVQ 16+x, R10; ADCQ 16+y, R10; \ + MOVQ 24+x, R11; ADCQ 24+y, R11; \ + CMOVQCS AX, DX; \ + ADDQ DX, R8; \ + ADCQ $0, R9; MOVQ R9, 8+z; \ + ADCQ $0, R10; MOVQ R10, 16+z; \ + ADCQ $0, R11; MOVQ R11, 24+z; \ + MOVL $0, DX; \ + CMOVQCS AX, DX; \ + ADDQ DX, R8; MOVQ R8, 0+z; + +// additionAdx adds x and y and stores in z +// Uses: AX, DX, R8-R11, FLAGS +// Instr: x86_64, cmov, adx +#define additionAdx(z,x,y) \ + MOVL $38, AX; \ + XORL DX, DX; \ + MOVQ 0+x, R8; ADCXQ 0+y, R8; \ + MOVQ 8+x, R9; ADCXQ 8+y, R9; \ + MOVQ 16+x, R10; ADCXQ 16+y, R10; \ + MOVQ 24+x, R11; ADCXQ 24+y, R11; \ + CMOVQCS AX, DX ; \ + XORL AX, AX; \ + ADCXQ DX, R8; \ + ADCXQ AX, R9; MOVQ R9, 8+z; \ + ADCXQ AX, R10; MOVQ R10, 16+z; \ + ADCXQ AX, R11; MOVQ R11, 24+z; \ + MOVL $38, DX; \ + CMOVQCS DX, AX; \ + ADDQ AX, R8; MOVQ R8, 0+z; + +// subtraction subtracts y from x and stores in z +// Uses: AX, DX, R8-R11, FLAGS +// Instr: x86_64, cmov +#define subtraction(z,x,y) \ + MOVL $38, AX; \ + MOVQ 0+x, R8; SUBQ 0+y, R8; \ + MOVQ 8+x, R9; SBBQ 8+y, R9; \ + MOVQ 16+x, R10; SBBQ 16+y, R10; \ + MOVQ 24+x, R11; SBBQ 24+y, R11; \ + MOVL $0, DX; \ + CMOVQCS AX, DX; \ + SUBQ DX, R8; \ + SBBQ $0, R9; MOVQ R9, 8+z; \ + SBBQ $0, R10; MOVQ R10, 16+z; \ + SBBQ $0, R11; MOVQ R11, 24+z; \ + MOVL $0, DX; \ + CMOVQCS AX, DX; \ + SUBQ DX, R8; MOVQ R8, 0+z; + +// integerMulAdx multiplies x and y and stores in z +// Uses: AX, DX, R8-R15, FLAGS +// Instr: x86_64, bmi2, adx +#define integerMulAdx(z,x,y) \ + MOVL $0,R15; \ + MOVQ 0+y, DX; XORL AX, AX; \ + MULXQ 0+x, AX, R8; MOVQ AX, 0+z; \ + MULXQ 8+x, AX, R9; ADCXQ AX, R8; \ + MULXQ 16+x, AX, R10; ADCXQ AX, R9; \ + MULXQ 24+x, AX, R11; ADCXQ AX, R10; \ + MOVL $0, AX;;;;;;;;; ADCXQ AX, R11; \ + MOVQ 8+y, DX; XORL AX, AX; \ + MULXQ 0+x, AX, R12; ADCXQ R8, AX; MOVQ AX, 8+z; \ + MULXQ 8+x, AX, R13; ADCXQ R9, R12; ADOXQ AX, R12; \ + MULXQ 16+x, AX, R14; ADCXQ R10, R13; ADOXQ AX, R13; \ + MULXQ 24+x, AX, R15; ADCXQ R11, R14; ADOXQ AX, R14; \ + MOVL $0, AX;;;;;;;;; ADCXQ AX, R15; ADOXQ AX, R15; \ + MOVQ 16+y, DX; XORL AX, AX; \ + MULXQ 0+x, AX, R8; ADCXQ R12, AX; MOVQ AX, 16+z; \ + MULXQ 8+x, AX, R9; ADCXQ R13, R8; ADOXQ AX, R8; \ + MULXQ 16+x, AX, R10; ADCXQ R14, R9; ADOXQ AX, R9; \ + MULXQ 24+x, AX, R11; ADCXQ R15, R10; ADOXQ AX, R10; \ + MOVL $0, AX;;;;;;;;; ADCXQ AX, R11; ADOXQ AX, R11; \ + MOVQ 24+y, DX; XORL AX, AX; \ + MULXQ 0+x, AX, R12; ADCXQ R8, AX; MOVQ AX, 24+z; \ + MULXQ 8+x, AX, R13; ADCXQ R9, R12; ADOXQ AX, R12; MOVQ R12, 32+z; \ + MULXQ 16+x, AX, R14; ADCXQ R10, R13; ADOXQ AX, R13; MOVQ R13, 40+z; \ + MULXQ 24+x, AX, R15; ADCXQ R11, R14; ADOXQ AX, R14; MOVQ R14, 48+z; \ + MOVL $0, AX;;;;;;;;; ADCXQ AX, R15; ADOXQ AX, R15; MOVQ R15, 56+z; + +// integerMulLeg multiplies x and y and stores in z +// Uses: AX, DX, R8-R15, FLAGS +// Instr: x86_64 +#define integerMulLeg(z,x,y) \ + MOVQ 0+y, R8; \ + MOVQ 0+x, AX; MULQ R8; MOVQ AX, 0+z; MOVQ DX, R15; \ + MOVQ 8+x, AX; MULQ R8; MOVQ AX, R13; MOVQ DX, R10; \ + MOVQ 16+x, AX; MULQ R8; MOVQ AX, R14; MOVQ DX, R11; \ + MOVQ 24+x, AX; MULQ R8; \ + ADDQ R13, R15; \ + ADCQ R14, R10; MOVQ R10, 16+z; \ + ADCQ AX, R11; MOVQ R11, 24+z; \ + ADCQ $0, DX; MOVQ DX, 32+z; \ + MOVQ 8+y, R8; \ + MOVQ 0+x, AX; MULQ R8; MOVQ AX, R12; MOVQ DX, R9; \ + MOVQ 8+x, AX; MULQ R8; MOVQ AX, R13; MOVQ DX, R10; \ + MOVQ 16+x, AX; MULQ R8; MOVQ AX, R14; MOVQ DX, R11; \ + MOVQ 24+x, AX; MULQ R8; \ + ADDQ R12, R15; MOVQ R15, 8+z; \ + ADCQ R13, R9; \ + ADCQ R14, R10; \ + ADCQ AX, R11; \ + ADCQ $0, DX; \ + ADCQ 16+z, R9; MOVQ R9, R15; \ + ADCQ 24+z, R10; MOVQ R10, 24+z; \ + ADCQ 32+z, R11; MOVQ R11, 32+z; \ + ADCQ $0, DX; MOVQ DX, 40+z; \ + MOVQ 16+y, R8; \ + MOVQ 0+x, AX; MULQ R8; MOVQ AX, R12; MOVQ DX, R9; \ + MOVQ 8+x, AX; MULQ R8; MOVQ AX, R13; MOVQ DX, R10; \ + MOVQ 16+x, AX; MULQ R8; MOVQ AX, R14; MOVQ DX, R11; \ + MOVQ 24+x, AX; MULQ R8; \ + ADDQ R12, R15; MOVQ R15, 16+z; \ + ADCQ R13, R9; \ + ADCQ R14, R10; \ + ADCQ AX, R11; \ + ADCQ $0, DX; \ + ADCQ 24+z, R9; MOVQ R9, R15; \ + ADCQ 32+z, R10; MOVQ R10, 32+z; \ + ADCQ 40+z, R11; MOVQ R11, 40+z; \ + ADCQ $0, DX; MOVQ DX, 48+z; \ + MOVQ 24+y, R8; \ + MOVQ 0+x, AX; MULQ R8; MOVQ AX, R12; MOVQ DX, R9; \ + MOVQ 8+x, AX; MULQ R8; MOVQ AX, R13; MOVQ DX, R10; \ + MOVQ 16+x, AX; MULQ R8; MOVQ AX, R14; MOVQ DX, R11; \ + MOVQ 24+x, AX; MULQ R8; \ + ADDQ R12, R15; MOVQ R15, 24+z; \ + ADCQ R13, R9; \ + ADCQ R14, R10; \ + ADCQ AX, R11; \ + ADCQ $0, DX; \ + ADCQ 32+z, R9; MOVQ R9, 32+z; \ + ADCQ 40+z, R10; MOVQ R10, 40+z; \ + ADCQ 48+z, R11; MOVQ R11, 48+z; \ + ADCQ $0, DX; MOVQ DX, 56+z; + +// integerSqrLeg squares x and stores in z +// Uses: AX, CX, DX, R8-R15, FLAGS +// Instr: x86_64 +#define integerSqrLeg(z,x) \ + MOVQ 0+x, R8; \ + MOVQ 8+x, AX; MULQ R8; MOVQ AX, R9; MOVQ DX, R10; /* A[0]*A[1] */ \ + MOVQ 16+x, AX; MULQ R8; MOVQ AX, R14; MOVQ DX, R11; /* A[0]*A[2] */ \ + MOVQ 24+x, AX; MULQ R8; MOVQ AX, R15; MOVQ DX, R12; /* A[0]*A[3] */ \ + MOVQ 24+x, R8; \ + MOVQ 8+x, AX; MULQ R8; MOVQ AX, CX; MOVQ DX, R13; /* A[3]*A[1] */ \ + MOVQ 16+x, AX; MULQ R8; /* A[3]*A[2] */ \ + \ + ADDQ R14, R10;\ + ADCQ R15, R11; MOVL $0, R15;\ + ADCQ CX, R12;\ + ADCQ AX, R13;\ + ADCQ $0, DX; MOVQ DX, R14;\ + MOVQ 8+x, AX; MULQ 16+x;\ + \ + ADDQ AX, R11;\ + ADCQ DX, R12;\ + ADCQ $0, R13;\ + ADCQ $0, R14;\ + ADCQ $0, R15;\ + \ + SHLQ $1, R14, R15; MOVQ R15, 56+z;\ + SHLQ $1, R13, R14; MOVQ R14, 48+z;\ + SHLQ $1, R12, R13; MOVQ R13, 40+z;\ + SHLQ $1, R11, R12; MOVQ R12, 32+z;\ + SHLQ $1, R10, R11; MOVQ R11, 24+z;\ + SHLQ $1, R9, R10; MOVQ R10, 16+z;\ + SHLQ $1, R9; MOVQ R9, 8+z;\ + \ + MOVQ 0+x,AX; MULQ AX; MOVQ AX, 0+z; MOVQ DX, R9;\ + MOVQ 8+x,AX; MULQ AX; MOVQ AX, R10; MOVQ DX, R11;\ + MOVQ 16+x,AX; MULQ AX; MOVQ AX, R12; MOVQ DX, R13;\ + MOVQ 24+x,AX; MULQ AX; MOVQ AX, R14; MOVQ DX, R15;\ + \ + ADDQ 8+z, R9; MOVQ R9, 8+z;\ + ADCQ 16+z, R10; MOVQ R10, 16+z;\ + ADCQ 24+z, R11; MOVQ R11, 24+z;\ + ADCQ 32+z, R12; MOVQ R12, 32+z;\ + ADCQ 40+z, R13; MOVQ R13, 40+z;\ + ADCQ 48+z, R14; MOVQ R14, 48+z;\ + ADCQ 56+z, R15; MOVQ R15, 56+z; + +// integerSqrAdx squares x and stores in z +// Uses: AX, CX, DX, R8-R15, FLAGS +// Instr: x86_64, bmi2, adx +#define integerSqrAdx(z,x) \ + MOVQ 0+x, DX; /* A[0] */ \ + MULXQ 8+x, R8, R14; /* A[1]*A[0] */ XORL R15, R15; \ + MULXQ 16+x, R9, R10; /* A[2]*A[0] */ ADCXQ R14, R9; \ + MULXQ 24+x, AX, CX; /* A[3]*A[0] */ ADCXQ AX, R10; \ + MOVQ 24+x, DX; /* A[3] */ \ + MULXQ 8+x, R11, R12; /* A[1]*A[3] */ ADCXQ CX, R11; \ + MULXQ 16+x, AX, R13; /* A[2]*A[3] */ ADCXQ AX, R12; \ + MOVQ 8+x, DX; /* A[1] */ ADCXQ R15, R13; \ + MULXQ 16+x, AX, CX; /* A[2]*A[1] */ MOVL $0, R14; \ + ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ADCXQ R15, R14; \ + XORL R15, R15; \ + ADOXQ AX, R10; ADCXQ R8, R8; \ + ADOXQ CX, R11; ADCXQ R9, R9; \ + ADOXQ R15, R12; ADCXQ R10, R10; \ + ADOXQ R15, R13; ADCXQ R11, R11; \ + ADOXQ R15, R14; ADCXQ R12, R12; \ + ;;;;;;;;;;;;;;; ADCXQ R13, R13; \ + ;;;;;;;;;;;;;;; ADCXQ R14, R14; \ + MOVQ 0+x, DX; MULXQ DX, AX, CX; /* A[0]^2 */ \ + ;;;;;;;;;;;;;;; MOVQ AX, 0+z; \ + ADDQ CX, R8; MOVQ R8, 8+z; \ + MOVQ 8+x, DX; MULXQ DX, AX, CX; /* A[1]^2 */ \ + ADCQ AX, R9; MOVQ R9, 16+z; \ + ADCQ CX, R10; MOVQ R10, 24+z; \ + MOVQ 16+x, DX; MULXQ DX, AX, CX; /* A[2]^2 */ \ + ADCQ AX, R11; MOVQ R11, 32+z; \ + ADCQ CX, R12; MOVQ R12, 40+z; \ + MOVQ 24+x, DX; MULXQ DX, AX, CX; /* A[3]^2 */ \ + ADCQ AX, R13; MOVQ R13, 48+z; \ + ADCQ CX, R14; MOVQ R14, 56+z; + +// reduceFromDouble finds z congruent to x modulo p such that 0> 63) + // PUT BIT 255 IN CARRY FLAG AND CLEAR + x3 &^= 1 << 63 + + x0, c0 := bits.Add64(x0, cx, 0) + x1, c1 := bits.Add64(x1, 0, c0) + x2, c2 := bits.Add64(x2, 0, c1) + x3, _ = bits.Add64(x3, 0, c2) + + // TEST FOR BIT 255 AGAIN; ONLY TRIGGERED ON OVERFLOW MODULO 2^255-19 + // cx = C[255] ? 0 : 19 + cx = uint64(19) &^ (-(x3 >> 63)) + // CLEAR BIT 255 + x3 &^= 1 << 63 + + x0, c0 = bits.Sub64(x0, cx, 0) + x1, c1 = bits.Sub64(x1, 0, c0) + x2, c2 = bits.Sub64(x2, 0, c1) + x3, _ = bits.Sub64(x3, 0, c2) + + binary.LittleEndian.PutUint64(x[0*8:1*8], x0) + binary.LittleEndian.PutUint64(x[1*8:2*8], x1) + binary.LittleEndian.PutUint64(x[2*8:3*8], x2) + binary.LittleEndian.PutUint64(x[3*8:4*8], x3) +} + +func red64(z *Elt, x0, x1, x2, x3, x4, x5, x6, x7 uint64) { + h0, l0 := bits.Mul64(x4, 38) + h1, l1 := bits.Mul64(x5, 38) + h2, l2 := bits.Mul64(x6, 38) + h3, l3 := bits.Mul64(x7, 38) + + l1, c0 := bits.Add64(h0, l1, 0) + l2, c1 := bits.Add64(h1, l2, c0) + l3, c2 := bits.Add64(h2, l3, c1) + l4, _ := bits.Add64(h3, 0, c2) + + l0, c0 = bits.Add64(l0, x0, 0) + l1, c1 = bits.Add64(l1, x1, c0) + l2, c2 = bits.Add64(l2, x2, c1) + l3, c3 := bits.Add64(l3, x3, c2) + l4, _ = bits.Add64(l4, 0, c3) + + _, l4 = bits.Mul64(l4, 38) + l0, c0 = bits.Add64(l0, l4, 0) + z1, c1 := bits.Add64(l1, 0, c0) + z2, c2 := bits.Add64(l2, 0, c1) + z3, c3 := bits.Add64(l3, 0, c2) + z0, _ := bits.Add64(l0, (-c3)&38, 0) + + binary.LittleEndian.PutUint64(z[0*8:1*8], z0) + binary.LittleEndian.PutUint64(z[1*8:2*8], z1) + binary.LittleEndian.PutUint64(z[2*8:3*8], z2) + binary.LittleEndian.PutUint64(z[3*8:4*8], z3) +} diff --git a/backend/vendor/github.com/cloudflare/circl/math/fp25519/fp_noasm.go b/backend/vendor/github.com/cloudflare/circl/math/fp25519/fp_noasm.go new file mode 100644 index 0000000..26ca4d0 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/fp25519/fp_noasm.go @@ -0,0 +1,13 @@ +//go:build !amd64 || purego +// +build !amd64 purego + +package fp25519 + +func cmov(x, y *Elt, n uint) { cmovGeneric(x, y, n) } +func cswap(x, y *Elt, n uint) { cswapGeneric(x, y, n) } +func add(z, x, y *Elt) { addGeneric(z, x, y) } +func sub(z, x, y *Elt) { subGeneric(z, x, y) } +func addsub(x, y *Elt) { addsubGeneric(x, y) } +func mul(z, x, y *Elt) { mulGeneric(z, x, y) } +func sqr(z, x *Elt) { sqrGeneric(z, x) } +func modp(z *Elt) { modpGeneric(z) } diff --git a/backend/vendor/github.com/cloudflare/circl/math/fp448/fp.go b/backend/vendor/github.com/cloudflare/circl/math/fp448/fp.go new file mode 100644 index 0000000..a5e3660 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/fp448/fp.go @@ -0,0 +1,164 @@ +// Package fp448 provides prime field arithmetic over GF(2^448-2^224-1). +package fp448 + +import ( + "errors" + + "github.com/cloudflare/circl/internal/conv" +) + +// Size in bytes of an element. +const Size = 56 + +// Elt is a prime field element. +type Elt [Size]byte + +func (e Elt) String() string { return conv.BytesLe2Hex(e[:]) } + +// p is the prime modulus 2^448-2^224-1. +var p = Elt{ + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xfe, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, +} + +// P returns the prime modulus 2^448-2^224-1. +func P() Elt { return p } + +// ToBytes stores in b the little-endian byte representation of x. +func ToBytes(b []byte, x *Elt) error { + if len(b) != Size { + return errors.New("wrong size") + } + Modp(x) + copy(b, x[:]) + return nil +} + +// IsZero returns true if x is equal to 0. +func IsZero(x *Elt) bool { Modp(x); return *x == Elt{} } + +// IsOne returns true if x is equal to 1. +func IsOne(x *Elt) bool { Modp(x); return *x == Elt{1} } + +// SetOne assigns x=1. +func SetOne(x *Elt) { *x = Elt{1} } + +// One returns the 1 element. +func One() (x Elt) { x = Elt{1}; return } + +// Neg calculates z = -x. +func Neg(z, x *Elt) { Sub(z, &p, x) } + +// Modp ensures that z is between [0,p-1]. +func Modp(z *Elt) { Sub(z, z, &p) } + +// InvSqrt calculates z = sqrt(x/y) iff x/y is a quadratic-residue. If so, +// isQR = true; otherwise, isQR = false, since x/y is a quadratic non-residue, +// and z = sqrt(-x/y). +func InvSqrt(z, x, y *Elt) (isQR bool) { + // First note that x^(2(k+1)) = x^(p-1)/2 * x = legendre(x) * x + // so that's x if x is a quadratic residue and -x otherwise. + // Next, y^(6k+3) = y^(4k+2) * y^(2k+1) = y^(p-1) * y^((p-1)/2) = legendre(y). + // So the z we compute satisfies z^2 y = x^(2(k+1)) y^(6k+3) = legendre(x)*legendre(y). + // Thus if x and y are quadratic residues, then z is indeed sqrt(x/y). + t0, t1 := &Elt{}, &Elt{} + Mul(t0, x, y) // x*y + Sqr(t1, y) // y^2 + Mul(t1, t0, t1) // x*y^3 + powPminus3div4(z, t1) // (x*y^3)^k + Mul(z, z, t0) // z = x*y*(x*y^3)^k = x^(k+1) * y^(3k+1) + + // Check if x/y is a quadratic residue + Sqr(t0, z) // z^2 + Mul(t0, t0, y) // y*z^2 + Sub(t0, t0, x) // y*z^2-x + return IsZero(t0) +} + +// Inv calculates z = 1/x mod p. +func Inv(z, x *Elt) { + // Calculates z = x^(4k+1) = x^(p-3+1) = x^(p-2) = x^-1, where k = (p-3)/4. + t := &Elt{} + powPminus3div4(t, x) // t = x^k + Sqr(t, t) // t = x^2k + Sqr(t, t) // t = x^4k + Mul(z, t, x) // z = x^(4k+1) +} + +// powPminus3div4 calculates z = x^k mod p, where k = (p-3)/4. +func powPminus3div4(z, x *Elt) { + x0, x1 := &Elt{}, &Elt{} + Sqr(z, x) + Mul(z, z, x) + Sqr(x0, z) + Mul(x0, x0, x) + Sqr(z, x0) + Sqr(z, z) + Sqr(z, z) + Mul(z, z, x0) + Sqr(x1, z) + for i := 0; i < 5; i++ { + Sqr(x1, x1) + } + Mul(x1, x1, z) + Sqr(z, x1) + for i := 0; i < 11; i++ { + Sqr(z, z) + } + Mul(z, z, x1) + Sqr(z, z) + Sqr(z, z) + Sqr(z, z) + Mul(z, z, x0) + Sqr(x1, z) + for i := 0; i < 26; i++ { + Sqr(x1, x1) + } + Mul(x1, x1, z) + Sqr(z, x1) + for i := 0; i < 53; i++ { + Sqr(z, z) + } + Mul(z, z, x1) + Sqr(z, z) + Sqr(z, z) + Sqr(z, z) + Mul(z, z, x0) + Sqr(x1, z) + for i := 0; i < 110; i++ { + Sqr(x1, x1) + } + Mul(x1, x1, z) + Sqr(z, x1) + Mul(z, z, x) + for i := 0; i < 223; i++ { + Sqr(z, z) + } + Mul(z, z, x1) +} + +// Cmov assigns y to x if n is 1. +func Cmov(x, y *Elt, n uint) { cmov(x, y, n) } + +// Cswap interchanges x and y if n is 1. +func Cswap(x, y *Elt, n uint) { cswap(x, y, n) } + +// Add calculates z = x+y mod p. +func Add(z, x, y *Elt) { add(z, x, y) } + +// Sub calculates z = x-y mod p. +func Sub(z, x, y *Elt) { sub(z, x, y) } + +// AddSub calculates (x,y) = (x+y mod p, x-y mod p). +func AddSub(x, y *Elt) { addsub(x, y) } + +// Mul calculates z = x*y mod p. +func Mul(z, x, y *Elt) { mul(z, x, y) } + +// Sqr calculates z = x^2 mod p. +func Sqr(z, x *Elt) { sqr(z, x) } diff --git a/backend/vendor/github.com/cloudflare/circl/math/fp448/fp_amd64.go b/backend/vendor/github.com/cloudflare/circl/math/fp448/fp_amd64.go new file mode 100644 index 0000000..6a12209 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/fp448/fp_amd64.go @@ -0,0 +1,43 @@ +//go:build amd64 && !purego +// +build amd64,!purego + +package fp448 + +import ( + "golang.org/x/sys/cpu" +) + +var hasBmi2Adx = cpu.X86.HasBMI2 && cpu.X86.HasADX + +var _ = hasBmi2Adx + +func cmov(x, y *Elt, n uint) { cmovAmd64(x, y, n) } +func cswap(x, y *Elt, n uint) { cswapAmd64(x, y, n) } +func add(z, x, y *Elt) { addAmd64(z, x, y) } +func sub(z, x, y *Elt) { subAmd64(z, x, y) } +func addsub(x, y *Elt) { addsubAmd64(x, y) } +func mul(z, x, y *Elt) { mulAmd64(z, x, y) } +func sqr(z, x *Elt) { sqrAmd64(z, x) } + +/* Functions defined in fp_amd64.s */ + +//go:noescape +func cmovAmd64(x, y *Elt, n uint) + +//go:noescape +func cswapAmd64(x, y *Elt, n uint) + +//go:noescape +func addAmd64(z, x, y *Elt) + +//go:noescape +func subAmd64(z, x, y *Elt) + +//go:noescape +func addsubAmd64(x, y *Elt) + +//go:noescape +func mulAmd64(z, x, y *Elt) + +//go:noescape +func sqrAmd64(z, x *Elt) diff --git a/backend/vendor/github.com/cloudflare/circl/math/fp448/fp_amd64.h b/backend/vendor/github.com/cloudflare/circl/math/fp448/fp_amd64.h new file mode 100644 index 0000000..536fe5b --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/fp448/fp_amd64.h @@ -0,0 +1,591 @@ +// This code was imported from https://github.com/armfazh/rfc7748_precomputed + +// CHECK_BMI2ADX triggers bmi2adx if supported, +// otherwise it fallbacks to legacy code. +#define CHECK_BMI2ADX(label, legacy, bmi2adx) \ + CMPB ·hasBmi2Adx(SB), $0 \ + JE label \ + bmi2adx \ + RET \ + label: \ + legacy \ + RET + +// cselect is a conditional move +// if b=1: it copies y into x; +// if b=0: x remains with the same value; +// if b<> 0,1: undefined. +// Uses: AX, DX, FLAGS +// Instr: x86_64, cmov +#define cselect(x,y,b) \ + TESTQ b, b \ + MOVQ 0+x, AX; MOVQ 0+y, DX; CMOVQNE DX, AX; MOVQ AX, 0+x; \ + MOVQ 8+x, AX; MOVQ 8+y, DX; CMOVQNE DX, AX; MOVQ AX, 8+x; \ + MOVQ 16+x, AX; MOVQ 16+y, DX; CMOVQNE DX, AX; MOVQ AX, 16+x; \ + MOVQ 24+x, AX; MOVQ 24+y, DX; CMOVQNE DX, AX; MOVQ AX, 24+x; \ + MOVQ 32+x, AX; MOVQ 32+y, DX; CMOVQNE DX, AX; MOVQ AX, 32+x; \ + MOVQ 40+x, AX; MOVQ 40+y, DX; CMOVQNE DX, AX; MOVQ AX, 40+x; \ + MOVQ 48+x, AX; MOVQ 48+y, DX; CMOVQNE DX, AX; MOVQ AX, 48+x; + +// cswap is a conditional swap +// if b=1: x,y <- y,x; +// if b=0: x,y remain with the same values; +// if b<> 0,1: undefined. +// Uses: AX, DX, R8, FLAGS +// Instr: x86_64, cmov +#define cswap(x,y,b) \ + TESTQ b, b \ + MOVQ 0+x, AX; MOVQ AX, R8; MOVQ 0+y, DX; CMOVQNE DX, AX; CMOVQNE R8, DX; MOVQ AX, 0+x; MOVQ DX, 0+y; \ + MOVQ 8+x, AX; MOVQ AX, R8; MOVQ 8+y, DX; CMOVQNE DX, AX; CMOVQNE R8, DX; MOVQ AX, 8+x; MOVQ DX, 8+y; \ + MOVQ 16+x, AX; MOVQ AX, R8; MOVQ 16+y, DX; CMOVQNE DX, AX; CMOVQNE R8, DX; MOVQ AX, 16+x; MOVQ DX, 16+y; \ + MOVQ 24+x, AX; MOVQ AX, R8; MOVQ 24+y, DX; CMOVQNE DX, AX; CMOVQNE R8, DX; MOVQ AX, 24+x; MOVQ DX, 24+y; \ + MOVQ 32+x, AX; MOVQ AX, R8; MOVQ 32+y, DX; CMOVQNE DX, AX; CMOVQNE R8, DX; MOVQ AX, 32+x; MOVQ DX, 32+y; \ + MOVQ 40+x, AX; MOVQ AX, R8; MOVQ 40+y, DX; CMOVQNE DX, AX; CMOVQNE R8, DX; MOVQ AX, 40+x; MOVQ DX, 40+y; \ + MOVQ 48+x, AX; MOVQ AX, R8; MOVQ 48+y, DX; CMOVQNE DX, AX; CMOVQNE R8, DX; MOVQ AX, 48+x; MOVQ DX, 48+y; + +// additionLeg adds x and y and stores in z +// Uses: AX, DX, R8-R14, FLAGS +// Instr: x86_64 +#define additionLeg(z,x,y) \ + MOVQ 0+x, R8; ADDQ 0+y, R8; \ + MOVQ 8+x, R9; ADCQ 8+y, R9; \ + MOVQ 16+x, R10; ADCQ 16+y, R10; \ + MOVQ 24+x, R11; ADCQ 24+y, R11; \ + MOVQ 32+x, R12; ADCQ 32+y, R12; \ + MOVQ 40+x, R13; ADCQ 40+y, R13; \ + MOVQ 48+x, R14; ADCQ 48+y, R14; \ + MOVQ $0, AX; ADCQ $0, AX; \ + MOVQ AX, DX; \ + SHLQ $32, DX; \ + ADDQ AX, R8; MOVQ $0, AX; \ + ADCQ $0, R9; \ + ADCQ $0, R10; \ + ADCQ DX, R11; \ + ADCQ $0, R12; \ + ADCQ $0, R13; \ + ADCQ $0, R14; \ + ADCQ $0, AX; \ + MOVQ AX, DX; \ + SHLQ $32, DX; \ + ADDQ AX, R8; MOVQ R8, 0+z; \ + ADCQ $0, R9; MOVQ R9, 8+z; \ + ADCQ $0, R10; MOVQ R10, 16+z; \ + ADCQ DX, R11; MOVQ R11, 24+z; \ + ADCQ $0, R12; MOVQ R12, 32+z; \ + ADCQ $0, R13; MOVQ R13, 40+z; \ + ADCQ $0, R14; MOVQ R14, 48+z; + + +// additionAdx adds x and y and stores in z +// Uses: AX, DX, R8-R15, FLAGS +// Instr: x86_64, adx +#define additionAdx(z,x,y) \ + MOVL $32, R15; \ + XORL DX, DX; \ + MOVQ 0+x, R8; ADCXQ 0+y, R8; \ + MOVQ 8+x, R9; ADCXQ 8+y, R9; \ + MOVQ 16+x, R10; ADCXQ 16+y, R10; \ + MOVQ 24+x, R11; ADCXQ 24+y, R11; \ + MOVQ 32+x, R12; ADCXQ 32+y, R12; \ + MOVQ 40+x, R13; ADCXQ 40+y, R13; \ + MOVQ 48+x, R14; ADCXQ 48+y, R14; \ + ;;;;;;;;;;;;;;; ADCXQ DX, DX; \ + XORL AX, AX; \ + ADCXQ DX, R8; SHLXQ R15, DX, DX; \ + ADCXQ AX, R9; \ + ADCXQ AX, R10; \ + ADCXQ DX, R11; \ + ADCXQ AX, R12; \ + ADCXQ AX, R13; \ + ADCXQ AX, R14; \ + ADCXQ AX, AX; \ + XORL DX, DX; \ + ADCXQ AX, R8; MOVQ R8, 0+z; SHLXQ R15, AX, AX; \ + ADCXQ DX, R9; MOVQ R9, 8+z; \ + ADCXQ DX, R10; MOVQ R10, 16+z; \ + ADCXQ AX, R11; MOVQ R11, 24+z; \ + ADCXQ DX, R12; MOVQ R12, 32+z; \ + ADCXQ DX, R13; MOVQ R13, 40+z; \ + ADCXQ DX, R14; MOVQ R14, 48+z; + +// subtraction subtracts y from x and stores in z +// Uses: AX, DX, R8-R14, FLAGS +// Instr: x86_64 +#define subtraction(z,x,y) \ + MOVQ 0+x, R8; SUBQ 0+y, R8; \ + MOVQ 8+x, R9; SBBQ 8+y, R9; \ + MOVQ 16+x, R10; SBBQ 16+y, R10; \ + MOVQ 24+x, R11; SBBQ 24+y, R11; \ + MOVQ 32+x, R12; SBBQ 32+y, R12; \ + MOVQ 40+x, R13; SBBQ 40+y, R13; \ + MOVQ 48+x, R14; SBBQ 48+y, R14; \ + MOVQ $0, AX; SETCS AX; \ + MOVQ AX, DX; \ + SHLQ $32, DX; \ + SUBQ AX, R8; MOVQ $0, AX; \ + SBBQ $0, R9; \ + SBBQ $0, R10; \ + SBBQ DX, R11; \ + SBBQ $0, R12; \ + SBBQ $0, R13; \ + SBBQ $0, R14; \ + SETCS AX; \ + MOVQ AX, DX; \ + SHLQ $32, DX; \ + SUBQ AX, R8; MOVQ R8, 0+z; \ + SBBQ $0, R9; MOVQ R9, 8+z; \ + SBBQ $0, R10; MOVQ R10, 16+z; \ + SBBQ DX, R11; MOVQ R11, 24+z; \ + SBBQ $0, R12; MOVQ R12, 32+z; \ + SBBQ $0, R13; MOVQ R13, 40+z; \ + SBBQ $0, R14; MOVQ R14, 48+z; + +// maddBmi2Adx multiplies x and y and accumulates in z +// Uses: AX, DX, R15, FLAGS +// Instr: x86_64, bmi2, adx +#define maddBmi2Adx(z,x,y,i,r0,r1,r2,r3,r4,r5,r6) \ + MOVQ i+y, DX; XORL AX, AX; \ + MULXQ 0+x, AX, R8; ADOXQ AX, r0; ADCXQ R8, r1; MOVQ r0,i+z; \ + MULXQ 8+x, AX, r0; ADOXQ AX, r1; ADCXQ r0, r2; MOVQ $0, R8; \ + MULXQ 16+x, AX, r0; ADOXQ AX, r2; ADCXQ r0, r3; \ + MULXQ 24+x, AX, r0; ADOXQ AX, r3; ADCXQ r0, r4; \ + MULXQ 32+x, AX, r0; ADOXQ AX, r4; ADCXQ r0, r5; \ + MULXQ 40+x, AX, r0; ADOXQ AX, r5; ADCXQ r0, r6; \ + MULXQ 48+x, AX, r0; ADOXQ AX, r6; ADCXQ R8, r0; \ + ;;;;;;;;;;;;;;;;;;; ADOXQ R8, r0; + +// integerMulAdx multiplies x and y and stores in z +// Uses: AX, DX, R8-R15, FLAGS +// Instr: x86_64, bmi2, adx +#define integerMulAdx(z,x,y) \ + MOVL $0,R15; \ + MOVQ 0+y, DX; XORL AX, AX; MOVQ $0, R8; \ + MULXQ 0+x, AX, R9; MOVQ AX, 0+z; \ + MULXQ 8+x, AX, R10; ADCXQ AX, R9; \ + MULXQ 16+x, AX, R11; ADCXQ AX, R10; \ + MULXQ 24+x, AX, R12; ADCXQ AX, R11; \ + MULXQ 32+x, AX, R13; ADCXQ AX, R12; \ + MULXQ 40+x, AX, R14; ADCXQ AX, R13; \ + MULXQ 48+x, AX, R15; ADCXQ AX, R14; \ + ;;;;;;;;;;;;;;;;;;;; ADCXQ R8, R15; \ + maddBmi2Adx(z,x,y, 8, R9,R10,R11,R12,R13,R14,R15) \ + maddBmi2Adx(z,x,y,16,R10,R11,R12,R13,R14,R15, R9) \ + maddBmi2Adx(z,x,y,24,R11,R12,R13,R14,R15, R9,R10) \ + maddBmi2Adx(z,x,y,32,R12,R13,R14,R15, R9,R10,R11) \ + maddBmi2Adx(z,x,y,40,R13,R14,R15, R9,R10,R11,R12) \ + maddBmi2Adx(z,x,y,48,R14,R15, R9,R10,R11,R12,R13) \ + MOVQ R15, 56+z; \ + MOVQ R9, 64+z; \ + MOVQ R10, 72+z; \ + MOVQ R11, 80+z; \ + MOVQ R12, 88+z; \ + MOVQ R13, 96+z; \ + MOVQ R14, 104+z; + +// maddLegacy multiplies x and y and accumulates in z +// Uses: AX, DX, R15, FLAGS +// Instr: x86_64 +#define maddLegacy(z,x,y,i) \ + MOVQ i+y, R15; \ + MOVQ 0+x, AX; MULQ R15; MOVQ AX, R8; ;;;;;;;;;;;; MOVQ DX, R9; \ + MOVQ 8+x, AX; MULQ R15; ADDQ AX, R9; ADCQ $0, DX; MOVQ DX, R10; \ + MOVQ 16+x, AX; MULQ R15; ADDQ AX, R10; ADCQ $0, DX; MOVQ DX, R11; \ + MOVQ 24+x, AX; MULQ R15; ADDQ AX, R11; ADCQ $0, DX; MOVQ DX, R12; \ + MOVQ 32+x, AX; MULQ R15; ADDQ AX, R12; ADCQ $0, DX; MOVQ DX, R13; \ + MOVQ 40+x, AX; MULQ R15; ADDQ AX, R13; ADCQ $0, DX; MOVQ DX, R14; \ + MOVQ 48+x, AX; MULQ R15; ADDQ AX, R14; ADCQ $0, DX; \ + ADDQ 0+i+z, R8; MOVQ R8, 0+i+z; \ + ADCQ 8+i+z, R9; MOVQ R9, 8+i+z; \ + ADCQ 16+i+z, R10; MOVQ R10, 16+i+z; \ + ADCQ 24+i+z, R11; MOVQ R11, 24+i+z; \ + ADCQ 32+i+z, R12; MOVQ R12, 32+i+z; \ + ADCQ 40+i+z, R13; MOVQ R13, 40+i+z; \ + ADCQ 48+i+z, R14; MOVQ R14, 48+i+z; \ + ADCQ $0, DX; MOVQ DX, 56+i+z; + +// integerMulLeg multiplies x and y and stores in z +// Uses: AX, DX, R8-R15, FLAGS +// Instr: x86_64 +#define integerMulLeg(z,x,y) \ + MOVQ 0+y, R15; \ + MOVQ 0+x, AX; MULQ R15; MOVQ AX, 0+z; ;;;;;;;;;;;; MOVQ DX, R8; \ + MOVQ 8+x, AX; MULQ R15; ADDQ AX, R8; ADCQ $0, DX; MOVQ DX, R9; MOVQ R8, 8+z; \ + MOVQ 16+x, AX; MULQ R15; ADDQ AX, R9; ADCQ $0, DX; MOVQ DX, R10; MOVQ R9, 16+z; \ + MOVQ 24+x, AX; MULQ R15; ADDQ AX, R10; ADCQ $0, DX; MOVQ DX, R11; MOVQ R10, 24+z; \ + MOVQ 32+x, AX; MULQ R15; ADDQ AX, R11; ADCQ $0, DX; MOVQ DX, R12; MOVQ R11, 32+z; \ + MOVQ 40+x, AX; MULQ R15; ADDQ AX, R12; ADCQ $0, DX; MOVQ DX, R13; MOVQ R12, 40+z; \ + MOVQ 48+x, AX; MULQ R15; ADDQ AX, R13; ADCQ $0, DX; MOVQ DX,56+z; MOVQ R13, 48+z; \ + maddLegacy(z,x,y, 8) \ + maddLegacy(z,x,y,16) \ + maddLegacy(z,x,y,24) \ + maddLegacy(z,x,y,32) \ + maddLegacy(z,x,y,40) \ + maddLegacy(z,x,y,48) + +// integerSqrLeg squares x and stores in z +// Uses: AX, CX, DX, R8-R15, FLAGS +// Instr: x86_64 +#define integerSqrLeg(z,x) \ + XORL R15, R15; \ + MOVQ 0+x, CX; \ + MOVQ CX, AX; MULQ CX; MOVQ AX, 0+z; MOVQ DX, R8; \ + ADDQ CX, CX; ADCQ $0, R15; \ + MOVQ 8+x, AX; MULQ CX; ADDQ AX, R8; ADCQ $0, DX; MOVQ DX, R9; MOVQ R8, 8+z; \ + MOVQ 16+x, AX; MULQ CX; ADDQ AX, R9; ADCQ $0, DX; MOVQ DX, R10; \ + MOVQ 24+x, AX; MULQ CX; ADDQ AX, R10; ADCQ $0, DX; MOVQ DX, R11; \ + MOVQ 32+x, AX; MULQ CX; ADDQ AX, R11; ADCQ $0, DX; MOVQ DX, R12; \ + MOVQ 40+x, AX; MULQ CX; ADDQ AX, R12; ADCQ $0, DX; MOVQ DX, R13; \ + MOVQ 48+x, AX; MULQ CX; ADDQ AX, R13; ADCQ $0, DX; MOVQ DX, R14; \ + \ + MOVQ 8+x, CX; \ + MOVQ CX, AX; ADDQ R15, CX; MOVQ $0, R15; ADCQ $0, R15; \ + ;;;;;;;;;;;;;; MULQ CX; ADDQ AX, R9; ADCQ $0, DX; MOVQ R9,16+z; \ + MOVQ R15, AX; NEGQ AX; ANDQ 8+x, AX; ADDQ AX, DX; ADCQ $0, R11; MOVQ DX, R8; \ + ADDQ 8+x, CX; ADCQ $0, R15; \ + MOVQ 16+x, AX; MULQ CX; ADDQ AX, R10; ADCQ $0, DX; ADDQ R8, R10; ADCQ $0, DX; MOVQ DX, R8; MOVQ R10, 24+z; \ + MOVQ 24+x, AX; MULQ CX; ADDQ AX, R11; ADCQ $0, DX; ADDQ R8, R11; ADCQ $0, DX; MOVQ DX, R8; \ + MOVQ 32+x, AX; MULQ CX; ADDQ AX, R12; ADCQ $0, DX; ADDQ R8, R12; ADCQ $0, DX; MOVQ DX, R8; \ + MOVQ 40+x, AX; MULQ CX; ADDQ AX, R13; ADCQ $0, DX; ADDQ R8, R13; ADCQ $0, DX; MOVQ DX, R8; \ + MOVQ 48+x, AX; MULQ CX; ADDQ AX, R14; ADCQ $0, DX; ADDQ R8, R14; ADCQ $0, DX; MOVQ DX, R9; \ + \ + MOVQ 16+x, CX; \ + MOVQ CX, AX; ADDQ R15, CX; MOVQ $0, R15; ADCQ $0, R15; \ + ;;;;;;;;;;;;;; MULQ CX; ADDQ AX, R11; ADCQ $0, DX; MOVQ R11, 32+z; \ + MOVQ R15, AX; NEGQ AX; ANDQ 16+x,AX; ADDQ AX, DX; ADCQ $0, R13; MOVQ DX, R8; \ + ADDQ 16+x, CX; ADCQ $0, R15; \ + MOVQ 24+x, AX; MULQ CX; ADDQ AX, R12; ADCQ $0, DX; ADDQ R8, R12; ADCQ $0, DX; MOVQ DX, R8; MOVQ R12, 40+z; \ + MOVQ 32+x, AX; MULQ CX; ADDQ AX, R13; ADCQ $0, DX; ADDQ R8, R13; ADCQ $0, DX; MOVQ DX, R8; \ + MOVQ 40+x, AX; MULQ CX; ADDQ AX, R14; ADCQ $0, DX; ADDQ R8, R14; ADCQ $0, DX; MOVQ DX, R8; \ + MOVQ 48+x, AX; MULQ CX; ADDQ AX, R9; ADCQ $0, DX; ADDQ R8, R9; ADCQ $0, DX; MOVQ DX,R10; \ + \ + MOVQ 24+x, CX; \ + MOVQ CX, AX; ADDQ R15, CX; MOVQ $0, R15; ADCQ $0, R15; \ + ;;;;;;;;;;;;;; MULQ CX; ADDQ AX, R13; ADCQ $0, DX; MOVQ R13, 48+z; \ + MOVQ R15, AX; NEGQ AX; ANDQ 24+x,AX; ADDQ AX, DX; ADCQ $0, R9; MOVQ DX, R8; \ + ADDQ 24+x, CX; ADCQ $0, R15; \ + MOVQ 32+x, AX; MULQ CX; ADDQ AX, R14; ADCQ $0, DX; ADDQ R8, R14; ADCQ $0, DX; MOVQ DX, R8; MOVQ R14, 56+z; \ + MOVQ 40+x, AX; MULQ CX; ADDQ AX, R9; ADCQ $0, DX; ADDQ R8, R9; ADCQ $0, DX; MOVQ DX, R8; \ + MOVQ 48+x, AX; MULQ CX; ADDQ AX, R10; ADCQ $0, DX; ADDQ R8, R10; ADCQ $0, DX; MOVQ DX,R11; \ + \ + MOVQ 32+x, CX; \ + MOVQ CX, AX; ADDQ R15, CX; MOVQ $0, R15; ADCQ $0, R15; \ + ;;;;;;;;;;;;;; MULQ CX; ADDQ AX, R9; ADCQ $0, DX; MOVQ R9, 64+z; \ + MOVQ R15, AX; NEGQ AX; ANDQ 32+x,AX; ADDQ AX, DX; ADCQ $0, R11; MOVQ DX, R8; \ + ADDQ 32+x, CX; ADCQ $0, R15; \ + MOVQ 40+x, AX; MULQ CX; ADDQ AX, R10; ADCQ $0, DX; ADDQ R8, R10; ADCQ $0, DX; MOVQ DX, R8; MOVQ R10, 72+z; \ + MOVQ 48+x, AX; MULQ CX; ADDQ AX, R11; ADCQ $0, DX; ADDQ R8, R11; ADCQ $0, DX; MOVQ DX,R12; \ + \ + XORL R13, R13; \ + XORL R14, R14; \ + MOVQ 40+x, CX; \ + MOVQ CX, AX; ADDQ R15, CX; MOVQ $0, R15; ADCQ $0, R15; \ + ;;;;;;;;;;;;;; MULQ CX; ADDQ AX, R11; ADCQ $0, DX; MOVQ R11, 80+z; \ + MOVQ R15, AX; NEGQ AX; ANDQ 40+x,AX; ADDQ AX, DX; ADCQ $0, R13; MOVQ DX, R8; \ + ADDQ 40+x, CX; ADCQ $0, R15; \ + MOVQ 48+x, AX; MULQ CX; ADDQ AX, R12; ADCQ $0, DX; ADDQ R8, R12; ADCQ $0, DX; MOVQ DX, R8; MOVQ R12, 88+z; \ + ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ADDQ R8, R13; ADCQ $0,R14; \ + \ + XORL R9, R9; \ + MOVQ 48+x, CX; \ + MOVQ CX, AX; ADDQ R15, CX; MOVQ $0, R15; ADCQ $0, R15; \ + ;;;;;;;;;;;;;; MULQ CX; ADDQ AX, R13; ADCQ $0, DX; MOVQ R13, 96+z; \ + MOVQ R15, AX; NEGQ AX; ANDQ 48+x,AX; ADDQ AX, DX; ADCQ $0, R9; MOVQ DX, R8; \ + ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ADDQ R8,R14; ADCQ $0, R9; MOVQ R14, 104+z; + + +// integerSqrAdx squares x and stores in z +// Uses: AX, CX, DX, R8-R15, FLAGS +// Instr: x86_64, bmi2, adx +#define integerSqrAdx(z,x) \ + XORL R15, R15; \ + MOVQ 0+x, DX; \ + ;;;;;;;;;;;;;; MULXQ DX, AX, R8; MOVQ AX, 0+z; \ + ADDQ DX, DX; ADCQ $0, R15; CLC; \ + MULXQ 8+x, AX, R9; ADCXQ AX, R8; MOVQ R8, 8+z; \ + MULXQ 16+x, AX, R10; ADCXQ AX, R9; MOVQ $0, R8;\ + MULXQ 24+x, AX, R11; ADCXQ AX, R10; \ + MULXQ 32+x, AX, R12; ADCXQ AX, R11; \ + MULXQ 40+x, AX, R13; ADCXQ AX, R12; \ + MULXQ 48+x, AX, R14; ADCXQ AX, R13; \ + ;;;;;;;;;;;;;;;;;;;; ADCXQ R8, R14; \ + \ + MOVQ 8+x, DX; \ + MOVQ DX, AX; ADDQ R15, DX; MOVQ $0, R15; ADCQ $0, R15; \ + MULXQ AX, AX, CX; \ + MOVQ R15, R8; NEGQ R8; ANDQ 8+x, R8; \ + ADDQ AX, R9; MOVQ R9, 16+z; \ + ADCQ CX, R8; \ + ADCQ $0, R11; \ + ADDQ 8+x, DX; \ + ADCQ $0, R15; \ + XORL R9, R9; ;;;;;;;;;;;;;;;;;;;;; ADOXQ R8, R10; \ + MULXQ 16+x, AX, CX; ADCXQ AX, R10; ADOXQ CX, R11; MOVQ R10, 24+z; \ + MULXQ 24+x, AX, CX; ADCXQ AX, R11; ADOXQ CX, R12; MOVQ $0, R10; \ + MULXQ 32+x, AX, CX; ADCXQ AX, R12; ADOXQ CX, R13; \ + MULXQ 40+x, AX, CX; ADCXQ AX, R13; ADOXQ CX, R14; \ + MULXQ 48+x, AX, CX; ADCXQ AX, R14; ADOXQ CX, R9; \ + ;;;;;;;;;;;;;;;;;;; ADCXQ R10, R9; \ + \ + MOVQ 16+x, DX; \ + MOVQ DX, AX; ADDQ R15, DX; MOVQ $0, R15; ADCQ $0, R15; \ + MULXQ AX, AX, CX; \ + MOVQ R15, R8; NEGQ R8; ANDQ 16+x, R8; \ + ADDQ AX, R11; MOVQ R11, 32+z; \ + ADCQ CX, R8; \ + ADCQ $0, R13; \ + ADDQ 16+x, DX; \ + ADCQ $0, R15; \ + XORL R11, R11; ;;;;;;;;;;;;;;;;;;; ADOXQ R8, R12; \ + MULXQ 24+x, AX, CX; ADCXQ AX, R12; ADOXQ CX, R13; MOVQ R12, 40+z; \ + MULXQ 32+x, AX, CX; ADCXQ AX, R13; ADOXQ CX, R14; MOVQ $0, R12; \ + MULXQ 40+x, AX, CX; ADCXQ AX, R14; ADOXQ CX, R9; \ + MULXQ 48+x, AX, CX; ADCXQ AX, R9; ADOXQ CX, R10; \ + ;;;;;;;;;;;;;;;;;;; ADCXQ R11,R10; \ + \ + MOVQ 24+x, DX; \ + MOVQ DX, AX; ADDQ R15, DX; MOVQ $0, R15; ADCQ $0, R15; \ + MULXQ AX, AX, CX; \ + MOVQ R15, R8; NEGQ R8; ANDQ 24+x, R8; \ + ADDQ AX, R13; MOVQ R13, 48+z; \ + ADCQ CX, R8; \ + ADCQ $0, R9; \ + ADDQ 24+x, DX; \ + ADCQ $0, R15; \ + XORL R13, R13; ;;;;;;;;;;;;;;;;;;; ADOXQ R8, R14; \ + MULXQ 32+x, AX, CX; ADCXQ AX, R14; ADOXQ CX, R9; MOVQ R14, 56+z; \ + MULXQ 40+x, AX, CX; ADCXQ AX, R9; ADOXQ CX, R10; MOVQ $0, R14; \ + MULXQ 48+x, AX, CX; ADCXQ AX, R10; ADOXQ CX, R11; \ + ;;;;;;;;;;;;;;;;;;; ADCXQ R12,R11; \ + \ + MOVQ 32+x, DX; \ + MOVQ DX, AX; ADDQ R15, DX; MOVQ $0, R15; ADCQ $0, R15; \ + MULXQ AX, AX, CX; \ + MOVQ R15, R8; NEGQ R8; ANDQ 32+x, R8; \ + ADDQ AX, R9; MOVQ R9, 64+z; \ + ADCQ CX, R8; \ + ADCQ $0, R11; \ + ADDQ 32+x, DX; \ + ADCQ $0, R15; \ + XORL R9, R9; ;;;;;;;;;;;;;;;;;;;;; ADOXQ R8, R10; \ + MULXQ 40+x, AX, CX; ADCXQ AX, R10; ADOXQ CX, R11; MOVQ R10, 72+z; \ + MULXQ 48+x, AX, CX; ADCXQ AX, R11; ADOXQ CX, R12; \ + ;;;;;;;;;;;;;;;;;;; ADCXQ R13,R12; \ + \ + MOVQ 40+x, DX; \ + MOVQ DX, AX; ADDQ R15, DX; MOVQ $0, R15; ADCQ $0, R15; \ + MULXQ AX, AX, CX; \ + MOVQ R15, R8; NEGQ R8; ANDQ 40+x, R8; \ + ADDQ AX, R11; MOVQ R11, 80+z; \ + ADCQ CX, R8; \ + ADCQ $0, R13; \ + ADDQ 40+x, DX; \ + ADCQ $0, R15; \ + XORL R11, R11; ;;;;;;;;;;;;;;;;;;; ADOXQ R8, R12; \ + MULXQ 48+x, AX, CX; ADCXQ AX, R12; ADOXQ CX, R13; MOVQ R12, 88+z; \ + ;;;;;;;;;;;;;;;;;;; ADCXQ R14,R13; \ + \ + MOVQ 48+x, DX; \ + MOVQ DX, AX; ADDQ R15, DX; MOVQ $0, R15; ADCQ $0, R15; \ + MULXQ AX, AX, CX; \ + MOVQ R15, R8; NEGQ R8; ANDQ 48+x, R8; \ + XORL R10, R10; ;;;;;;;;;;;;;; ADOXQ CX, R14; \ + ;;;;;;;;;;;;;; ADCXQ AX, R13; ;;;;;;;;;;;;;; MOVQ R13, 96+z; \ + ;;;;;;;;;;;;;; ADCXQ R8, R14; MOVQ R14, 104+z; + +// reduceFromDoubleLeg finds a z=x modulo p such that z<2^448 and stores in z +// Uses: AX, R8-R15, FLAGS +// Instr: x86_64 +#define reduceFromDoubleLeg(z,x) \ + /* ( ,2C13,2C12,2C11,2C10|C10,C9,C8, C7) + (C6,...,C0) */ \ + /* (r14, r13, r12, r11, r10,r9,r8,r15) */ \ + MOVQ 80+x,AX; MOVQ AX,R10; \ + MOVQ $0xFFFFFFFF00000000, R8; \ + ANDQ R8,R10; \ + \ + MOVQ $0,R14; \ + MOVQ 104+x,R13; SHLQ $1,R13,R14; \ + MOVQ 96+x,R12; SHLQ $1,R12,R13; \ + MOVQ 88+x,R11; SHLQ $1,R11,R12; \ + MOVQ 72+x, R9; SHLQ $1,R10,R11; \ + MOVQ 64+x, R8; SHLQ $1,R10; \ + MOVQ $0xFFFFFFFF,R15; ANDQ R15,AX; ORQ AX,R10; \ + MOVQ 56+x,R15; \ + \ + ADDQ 0+x,R15; MOVQ R15, 0+z; MOVQ 56+x,R15; \ + ADCQ 8+x, R8; MOVQ R8, 8+z; MOVQ 64+x, R8; \ + ADCQ 16+x, R9; MOVQ R9,16+z; MOVQ 72+x, R9; \ + ADCQ 24+x,R10; MOVQ R10,24+z; MOVQ 80+x,R10; \ + ADCQ 32+x,R11; MOVQ R11,32+z; MOVQ 88+x,R11; \ + ADCQ 40+x,R12; MOVQ R12,40+z; MOVQ 96+x,R12; \ + ADCQ 48+x,R13; MOVQ R13,48+z; MOVQ 104+x,R13; \ + ADCQ $0,R14; \ + /* (c10c9,c9c8,c8c7,c7c13,c13c12,c12c11,c11c10) + (c6,...,c0) */ \ + /* ( r9, r8, r15, r13, r12, r11, r10) */ \ + MOVQ R10, AX; \ + SHRQ $32,R11,R10; \ + SHRQ $32,R12,R11; \ + SHRQ $32,R13,R12; \ + SHRQ $32,R15,R13; \ + SHRQ $32, R8,R15; \ + SHRQ $32, R9, R8; \ + SHRQ $32, AX, R9; \ + \ + ADDQ 0+z,R10; \ + ADCQ 8+z,R11; \ + ADCQ 16+z,R12; \ + ADCQ 24+z,R13; \ + ADCQ 32+z,R15; \ + ADCQ 40+z, R8; \ + ADCQ 48+z, R9; \ + ADCQ $0,R14; \ + /* ( c7) + (c6,...,c0) */ \ + /* (r14) */ \ + MOVQ R14, AX; SHLQ $32, AX; \ + ADDQ R14,R10; MOVQ $0,R14; \ + ADCQ $0,R11; \ + ADCQ $0,R12; \ + ADCQ AX,R13; \ + ADCQ $0,R15; \ + ADCQ $0, R8; \ + ADCQ $0, R9; \ + ADCQ $0,R14; \ + /* ( c7) + (c6,...,c0) */ \ + /* (r14) */ \ + MOVQ R14, AX; SHLQ $32,AX; \ + ADDQ R14,R10; MOVQ R10, 0+z; \ + ADCQ $0,R11; MOVQ R11, 8+z; \ + ADCQ $0,R12; MOVQ R12,16+z; \ + ADCQ AX,R13; MOVQ R13,24+z; \ + ADCQ $0,R15; MOVQ R15,32+z; \ + ADCQ $0, R8; MOVQ R8,40+z; \ + ADCQ $0, R9; MOVQ R9,48+z; + +// reduceFromDoubleAdx finds a z=x modulo p such that z<2^448 and stores in z +// Uses: AX, R8-R15, FLAGS +// Instr: x86_64, adx +#define reduceFromDoubleAdx(z,x) \ + /* ( ,2C13,2C12,2C11,2C10|C10,C9,C8, C7) + (C6,...,C0) */ \ + /* (r14, r13, r12, r11, r10,r9,r8,r15) */ \ + MOVQ 80+x,AX; MOVQ AX,R10; \ + MOVQ $0xFFFFFFFF00000000, R8; \ + ANDQ R8,R10; \ + \ + MOVQ $0,R14; \ + MOVQ 104+x,R13; SHLQ $1,R13,R14; \ + MOVQ 96+x,R12; SHLQ $1,R12,R13; \ + MOVQ 88+x,R11; SHLQ $1,R11,R12; \ + MOVQ 72+x, R9; SHLQ $1,R10,R11; \ + MOVQ 64+x, R8; SHLQ $1,R10; \ + MOVQ $0xFFFFFFFF,R15; ANDQ R15,AX; ORQ AX,R10; \ + MOVQ 56+x,R15; \ + \ + XORL AX,AX; \ + ADCXQ 0+x,R15; MOVQ R15, 0+z; MOVQ 56+x,R15; \ + ADCXQ 8+x, R8; MOVQ R8, 8+z; MOVQ 64+x, R8; \ + ADCXQ 16+x, R9; MOVQ R9,16+z; MOVQ 72+x, R9; \ + ADCXQ 24+x,R10; MOVQ R10,24+z; MOVQ 80+x,R10; \ + ADCXQ 32+x,R11; MOVQ R11,32+z; MOVQ 88+x,R11; \ + ADCXQ 40+x,R12; MOVQ R12,40+z; MOVQ 96+x,R12; \ + ADCXQ 48+x,R13; MOVQ R13,48+z; MOVQ 104+x,R13; \ + ADCXQ AX,R14; \ + /* (c10c9,c9c8,c8c7,c7c13,c13c12,c12c11,c11c10) + (c6,...,c0) */ \ + /* ( r9, r8, r15, r13, r12, r11, r10) */ \ + MOVQ R10, AX; \ + SHRQ $32,R11,R10; \ + SHRQ $32,R12,R11; \ + SHRQ $32,R13,R12; \ + SHRQ $32,R15,R13; \ + SHRQ $32, R8,R15; \ + SHRQ $32, R9, R8; \ + SHRQ $32, AX, R9; \ + \ + XORL AX,AX; \ + ADCXQ 0+z,R10; \ + ADCXQ 8+z,R11; \ + ADCXQ 16+z,R12; \ + ADCXQ 24+z,R13; \ + ADCXQ 32+z,R15; \ + ADCXQ 40+z, R8; \ + ADCXQ 48+z, R9; \ + ADCXQ AX,R14; \ + /* ( c7) + (c6,...,c0) */ \ + /* (r14) */ \ + MOVQ R14, AX; SHLQ $32, AX; \ + CLC; \ + ADCXQ R14,R10; MOVQ $0,R14; \ + ADCXQ R14,R11; \ + ADCXQ R14,R12; \ + ADCXQ AX,R13; \ + ADCXQ R14,R15; \ + ADCXQ R14, R8; \ + ADCXQ R14, R9; \ + ADCXQ R14,R14; \ + /* ( c7) + (c6,...,c0) */ \ + /* (r14) */ \ + MOVQ R14, AX; SHLQ $32, AX; \ + CLC; \ + ADCXQ R14,R10; MOVQ R10, 0+z; MOVQ $0,R14; \ + ADCXQ R14,R11; MOVQ R11, 8+z; \ + ADCXQ R14,R12; MOVQ R12,16+z; \ + ADCXQ AX,R13; MOVQ R13,24+z; \ + ADCXQ R14,R15; MOVQ R15,32+z; \ + ADCXQ R14, R8; MOVQ R8,40+z; \ + ADCXQ R14, R9; MOVQ R9,48+z; + +// addSub calculates two operations: x,y = x+y,x-y +// Uses: AX, DX, R8-R15, FLAGS +#define addSub(x,y) \ + MOVQ 0+x, R8; ADDQ 0+y, R8; \ + MOVQ 8+x, R9; ADCQ 8+y, R9; \ + MOVQ 16+x, R10; ADCQ 16+y, R10; \ + MOVQ 24+x, R11; ADCQ 24+y, R11; \ + MOVQ 32+x, R12; ADCQ 32+y, R12; \ + MOVQ 40+x, R13; ADCQ 40+y, R13; \ + MOVQ 48+x, R14; ADCQ 48+y, R14; \ + MOVQ $0, AX; ADCQ $0, AX; \ + MOVQ AX, DX; \ + SHLQ $32, DX; \ + ADDQ AX, R8; MOVQ $0, AX; \ + ADCQ $0, R9; \ + ADCQ $0, R10; \ + ADCQ DX, R11; \ + ADCQ $0, R12; \ + ADCQ $0, R13; \ + ADCQ $0, R14; \ + ADCQ $0, AX; \ + MOVQ AX, DX; \ + SHLQ $32, DX; \ + ADDQ AX, R8; MOVQ 0+x,AX; MOVQ R8, 0+x; MOVQ AX, R8; \ + ADCQ $0, R9; MOVQ 8+x,AX; MOVQ R9, 8+x; MOVQ AX, R9; \ + ADCQ $0, R10; MOVQ 16+x,AX; MOVQ R10, 16+x; MOVQ AX, R10; \ + ADCQ DX, R11; MOVQ 24+x,AX; MOVQ R11, 24+x; MOVQ AX, R11; \ + ADCQ $0, R12; MOVQ 32+x,AX; MOVQ R12, 32+x; MOVQ AX, R12; \ + ADCQ $0, R13; MOVQ 40+x,AX; MOVQ R13, 40+x; MOVQ AX, R13; \ + ADCQ $0, R14; MOVQ 48+x,AX; MOVQ R14, 48+x; MOVQ AX, R14; \ + SUBQ 0+y, R8; \ + SBBQ 8+y, R9; \ + SBBQ 16+y, R10; \ + SBBQ 24+y, R11; \ + SBBQ 32+y, R12; \ + SBBQ 40+y, R13; \ + SBBQ 48+y, R14; \ + MOVQ $0, AX; SETCS AX; \ + MOVQ AX, DX; \ + SHLQ $32, DX; \ + SUBQ AX, R8; MOVQ $0, AX; \ + SBBQ $0, R9; \ + SBBQ $0, R10; \ + SBBQ DX, R11; \ + SBBQ $0, R12; \ + SBBQ $0, R13; \ + SBBQ $0, R14; \ + SETCS AX; \ + MOVQ AX, DX; \ + SHLQ $32, DX; \ + SUBQ AX, R8; MOVQ R8, 0+y; \ + SBBQ $0, R9; MOVQ R9, 8+y; \ + SBBQ $0, R10; MOVQ R10, 16+y; \ + SBBQ DX, R11; MOVQ R11, 24+y; \ + SBBQ $0, R12; MOVQ R12, 32+y; \ + SBBQ $0, R13; MOVQ R13, 40+y; \ + SBBQ $0, R14; MOVQ R14, 48+y; diff --git a/backend/vendor/github.com/cloudflare/circl/math/fp448/fp_amd64.s b/backend/vendor/github.com/cloudflare/circl/math/fp448/fp_amd64.s new file mode 100644 index 0000000..3f1f07c --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/fp448/fp_amd64.s @@ -0,0 +1,75 @@ +//go:build amd64 && !purego +// +build amd64,!purego + +#include "textflag.h" +#include "fp_amd64.h" + +// func cmovAmd64(x, y *Elt, n uint) +TEXT ·cmovAmd64(SB),NOSPLIT,$0-24 + MOVQ x+0(FP), DI + MOVQ y+8(FP), SI + MOVQ n+16(FP), BX + cselect(0(DI),0(SI),BX) + RET + +// func cswapAmd64(x, y *Elt, n uint) +TEXT ·cswapAmd64(SB),NOSPLIT,$0-24 + MOVQ x+0(FP), DI + MOVQ y+8(FP), SI + MOVQ n+16(FP), BX + cswap(0(DI),0(SI),BX) + RET + +// func subAmd64(z, x, y *Elt) +TEXT ·subAmd64(SB),NOSPLIT,$0-24 + MOVQ z+0(FP), DI + MOVQ x+8(FP), SI + MOVQ y+16(FP), BX + subtraction(0(DI),0(SI),0(BX)) + RET + +// func addsubAmd64(x, y *Elt) +TEXT ·addsubAmd64(SB),NOSPLIT,$0-16 + MOVQ x+0(FP), DI + MOVQ y+8(FP), SI + addSub(0(DI),0(SI)) + RET + +#define addLegacy \ + additionLeg(0(DI),0(SI),0(BX)) +#define addBmi2Adx \ + additionAdx(0(DI),0(SI),0(BX)) + +#define mulLegacy \ + integerMulLeg(0(SP),0(SI),0(BX)) \ + reduceFromDoubleLeg(0(DI),0(SP)) +#define mulBmi2Adx \ + integerMulAdx(0(SP),0(SI),0(BX)) \ + reduceFromDoubleAdx(0(DI),0(SP)) + +#define sqrLegacy \ + integerSqrLeg(0(SP),0(SI)) \ + reduceFromDoubleLeg(0(DI),0(SP)) +#define sqrBmi2Adx \ + integerSqrAdx(0(SP),0(SI)) \ + reduceFromDoubleAdx(0(DI),0(SP)) + +// func addAmd64(z, x, y *Elt) +TEXT ·addAmd64(SB),NOSPLIT,$0-24 + MOVQ z+0(FP), DI + MOVQ x+8(FP), SI + MOVQ y+16(FP), BX + CHECK_BMI2ADX(LADD, addLegacy, addBmi2Adx) + +// func mulAmd64(z, x, y *Elt) +TEXT ·mulAmd64(SB),NOSPLIT,$112-24 + MOVQ z+0(FP), DI + MOVQ x+8(FP), SI + MOVQ y+16(FP), BX + CHECK_BMI2ADX(LMUL, mulLegacy, mulBmi2Adx) + +// func sqrAmd64(z, x *Elt) +TEXT ·sqrAmd64(SB),NOSPLIT,$112-16 + MOVQ z+0(FP), DI + MOVQ x+8(FP), SI + CHECK_BMI2ADX(LSQR, sqrLegacy, sqrBmi2Adx) diff --git a/backend/vendor/github.com/cloudflare/circl/math/fp448/fp_generic.go b/backend/vendor/github.com/cloudflare/circl/math/fp448/fp_generic.go new file mode 100644 index 0000000..47a0b63 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/fp448/fp_generic.go @@ -0,0 +1,339 @@ +package fp448 + +import ( + "encoding/binary" + "math/bits" +) + +func cmovGeneric(x, y *Elt, n uint) { + m := -uint64(n & 0x1) + x0 := binary.LittleEndian.Uint64(x[0*8 : 1*8]) + x1 := binary.LittleEndian.Uint64(x[1*8 : 2*8]) + x2 := binary.LittleEndian.Uint64(x[2*8 : 3*8]) + x3 := binary.LittleEndian.Uint64(x[3*8 : 4*8]) + x4 := binary.LittleEndian.Uint64(x[4*8 : 5*8]) + x5 := binary.LittleEndian.Uint64(x[5*8 : 6*8]) + x6 := binary.LittleEndian.Uint64(x[6*8 : 7*8]) + + y0 := binary.LittleEndian.Uint64(y[0*8 : 1*8]) + y1 := binary.LittleEndian.Uint64(y[1*8 : 2*8]) + y2 := binary.LittleEndian.Uint64(y[2*8 : 3*8]) + y3 := binary.LittleEndian.Uint64(y[3*8 : 4*8]) + y4 := binary.LittleEndian.Uint64(y[4*8 : 5*8]) + y5 := binary.LittleEndian.Uint64(y[5*8 : 6*8]) + y6 := binary.LittleEndian.Uint64(y[6*8 : 7*8]) + + x0 = (x0 &^ m) | (y0 & m) + x1 = (x1 &^ m) | (y1 & m) + x2 = (x2 &^ m) | (y2 & m) + x3 = (x3 &^ m) | (y3 & m) + x4 = (x4 &^ m) | (y4 & m) + x5 = (x5 &^ m) | (y5 & m) + x6 = (x6 &^ m) | (y6 & m) + + binary.LittleEndian.PutUint64(x[0*8:1*8], x0) + binary.LittleEndian.PutUint64(x[1*8:2*8], x1) + binary.LittleEndian.PutUint64(x[2*8:3*8], x2) + binary.LittleEndian.PutUint64(x[3*8:4*8], x3) + binary.LittleEndian.PutUint64(x[4*8:5*8], x4) + binary.LittleEndian.PutUint64(x[5*8:6*8], x5) + binary.LittleEndian.PutUint64(x[6*8:7*8], x6) +} + +func cswapGeneric(x, y *Elt, n uint) { + m := -uint64(n & 0x1) + x0 := binary.LittleEndian.Uint64(x[0*8 : 1*8]) + x1 := binary.LittleEndian.Uint64(x[1*8 : 2*8]) + x2 := binary.LittleEndian.Uint64(x[2*8 : 3*8]) + x3 := binary.LittleEndian.Uint64(x[3*8 : 4*8]) + x4 := binary.LittleEndian.Uint64(x[4*8 : 5*8]) + x5 := binary.LittleEndian.Uint64(x[5*8 : 6*8]) + x6 := binary.LittleEndian.Uint64(x[6*8 : 7*8]) + + y0 := binary.LittleEndian.Uint64(y[0*8 : 1*8]) + y1 := binary.LittleEndian.Uint64(y[1*8 : 2*8]) + y2 := binary.LittleEndian.Uint64(y[2*8 : 3*8]) + y3 := binary.LittleEndian.Uint64(y[3*8 : 4*8]) + y4 := binary.LittleEndian.Uint64(y[4*8 : 5*8]) + y5 := binary.LittleEndian.Uint64(y[5*8 : 6*8]) + y6 := binary.LittleEndian.Uint64(y[6*8 : 7*8]) + + t0 := m & (x0 ^ y0) + t1 := m & (x1 ^ y1) + t2 := m & (x2 ^ y2) + t3 := m & (x3 ^ y3) + t4 := m & (x4 ^ y4) + t5 := m & (x5 ^ y5) + t6 := m & (x6 ^ y6) + x0 ^= t0 + x1 ^= t1 + x2 ^= t2 + x3 ^= t3 + x4 ^= t4 + x5 ^= t5 + x6 ^= t6 + y0 ^= t0 + y1 ^= t1 + y2 ^= t2 + y3 ^= t3 + y4 ^= t4 + y5 ^= t5 + y6 ^= t6 + + binary.LittleEndian.PutUint64(x[0*8:1*8], x0) + binary.LittleEndian.PutUint64(x[1*8:2*8], x1) + binary.LittleEndian.PutUint64(x[2*8:3*8], x2) + binary.LittleEndian.PutUint64(x[3*8:4*8], x3) + binary.LittleEndian.PutUint64(x[4*8:5*8], x4) + binary.LittleEndian.PutUint64(x[5*8:6*8], x5) + binary.LittleEndian.PutUint64(x[6*8:7*8], x6) + + binary.LittleEndian.PutUint64(y[0*8:1*8], y0) + binary.LittleEndian.PutUint64(y[1*8:2*8], y1) + binary.LittleEndian.PutUint64(y[2*8:3*8], y2) + binary.LittleEndian.PutUint64(y[3*8:4*8], y3) + binary.LittleEndian.PutUint64(y[4*8:5*8], y4) + binary.LittleEndian.PutUint64(y[5*8:6*8], y5) + binary.LittleEndian.PutUint64(y[6*8:7*8], y6) +} + +func addGeneric(z, x, y *Elt) { + x0 := binary.LittleEndian.Uint64(x[0*8 : 1*8]) + x1 := binary.LittleEndian.Uint64(x[1*8 : 2*8]) + x2 := binary.LittleEndian.Uint64(x[2*8 : 3*8]) + x3 := binary.LittleEndian.Uint64(x[3*8 : 4*8]) + x4 := binary.LittleEndian.Uint64(x[4*8 : 5*8]) + x5 := binary.LittleEndian.Uint64(x[5*8 : 6*8]) + x6 := binary.LittleEndian.Uint64(x[6*8 : 7*8]) + + y0 := binary.LittleEndian.Uint64(y[0*8 : 1*8]) + y1 := binary.LittleEndian.Uint64(y[1*8 : 2*8]) + y2 := binary.LittleEndian.Uint64(y[2*8 : 3*8]) + y3 := binary.LittleEndian.Uint64(y[3*8 : 4*8]) + y4 := binary.LittleEndian.Uint64(y[4*8 : 5*8]) + y5 := binary.LittleEndian.Uint64(y[5*8 : 6*8]) + y6 := binary.LittleEndian.Uint64(y[6*8 : 7*8]) + + z0, c0 := bits.Add64(x0, y0, 0) + z1, c1 := bits.Add64(x1, y1, c0) + z2, c2 := bits.Add64(x2, y2, c1) + z3, c3 := bits.Add64(x3, y3, c2) + z4, c4 := bits.Add64(x4, y4, c3) + z5, c5 := bits.Add64(x5, y5, c4) + z6, z7 := bits.Add64(x6, y6, c5) + + z0, c0 = bits.Add64(z0, z7, 0) + z1, c1 = bits.Add64(z1, 0, c0) + z2, c2 = bits.Add64(z2, 0, c1) + z3, c3 = bits.Add64(z3, z7<<32, c2) + z4, c4 = bits.Add64(z4, 0, c3) + z5, c5 = bits.Add64(z5, 0, c4) + z6, z7 = bits.Add64(z6, 0, c5) + + z0, c0 = bits.Add64(z0, z7, 0) + z1, c1 = bits.Add64(z1, 0, c0) + z2, c2 = bits.Add64(z2, 0, c1) + z3, c3 = bits.Add64(z3, z7<<32, c2) + z4, c4 = bits.Add64(z4, 0, c3) + z5, c5 = bits.Add64(z5, 0, c4) + z6, _ = bits.Add64(z6, 0, c5) + + binary.LittleEndian.PutUint64(z[0*8:1*8], z0) + binary.LittleEndian.PutUint64(z[1*8:2*8], z1) + binary.LittleEndian.PutUint64(z[2*8:3*8], z2) + binary.LittleEndian.PutUint64(z[3*8:4*8], z3) + binary.LittleEndian.PutUint64(z[4*8:5*8], z4) + binary.LittleEndian.PutUint64(z[5*8:6*8], z5) + binary.LittleEndian.PutUint64(z[6*8:7*8], z6) +} + +func subGeneric(z, x, y *Elt) { + x0 := binary.LittleEndian.Uint64(x[0*8 : 1*8]) + x1 := binary.LittleEndian.Uint64(x[1*8 : 2*8]) + x2 := binary.LittleEndian.Uint64(x[2*8 : 3*8]) + x3 := binary.LittleEndian.Uint64(x[3*8 : 4*8]) + x4 := binary.LittleEndian.Uint64(x[4*8 : 5*8]) + x5 := binary.LittleEndian.Uint64(x[5*8 : 6*8]) + x6 := binary.LittleEndian.Uint64(x[6*8 : 7*8]) + + y0 := binary.LittleEndian.Uint64(y[0*8 : 1*8]) + y1 := binary.LittleEndian.Uint64(y[1*8 : 2*8]) + y2 := binary.LittleEndian.Uint64(y[2*8 : 3*8]) + y3 := binary.LittleEndian.Uint64(y[3*8 : 4*8]) + y4 := binary.LittleEndian.Uint64(y[4*8 : 5*8]) + y5 := binary.LittleEndian.Uint64(y[5*8 : 6*8]) + y6 := binary.LittleEndian.Uint64(y[6*8 : 7*8]) + + z0, c0 := bits.Sub64(x0, y0, 0) + z1, c1 := bits.Sub64(x1, y1, c0) + z2, c2 := bits.Sub64(x2, y2, c1) + z3, c3 := bits.Sub64(x3, y3, c2) + z4, c4 := bits.Sub64(x4, y4, c3) + z5, c5 := bits.Sub64(x5, y5, c4) + z6, z7 := bits.Sub64(x6, y6, c5) + + z0, c0 = bits.Sub64(z0, z7, 0) + z1, c1 = bits.Sub64(z1, 0, c0) + z2, c2 = bits.Sub64(z2, 0, c1) + z3, c3 = bits.Sub64(z3, z7<<32, c2) + z4, c4 = bits.Sub64(z4, 0, c3) + z5, c5 = bits.Sub64(z5, 0, c4) + z6, z7 = bits.Sub64(z6, 0, c5) + + z0, c0 = bits.Sub64(z0, z7, 0) + z1, c1 = bits.Sub64(z1, 0, c0) + z2, c2 = bits.Sub64(z2, 0, c1) + z3, c3 = bits.Sub64(z3, z7<<32, c2) + z4, c4 = bits.Sub64(z4, 0, c3) + z5, c5 = bits.Sub64(z5, 0, c4) + z6, _ = bits.Sub64(z6, 0, c5) + + binary.LittleEndian.PutUint64(z[0*8:1*8], z0) + binary.LittleEndian.PutUint64(z[1*8:2*8], z1) + binary.LittleEndian.PutUint64(z[2*8:3*8], z2) + binary.LittleEndian.PutUint64(z[3*8:4*8], z3) + binary.LittleEndian.PutUint64(z[4*8:5*8], z4) + binary.LittleEndian.PutUint64(z[5*8:6*8], z5) + binary.LittleEndian.PutUint64(z[6*8:7*8], z6) +} + +func addsubGeneric(x, y *Elt) { + z := &Elt{} + addGeneric(z, x, y) + subGeneric(y, x, y) + *x = *z +} + +func mulGeneric(z, x, y *Elt) { + x0 := binary.LittleEndian.Uint64(x[0*8 : 1*8]) + x1 := binary.LittleEndian.Uint64(x[1*8 : 2*8]) + x2 := binary.LittleEndian.Uint64(x[2*8 : 3*8]) + x3 := binary.LittleEndian.Uint64(x[3*8 : 4*8]) + x4 := binary.LittleEndian.Uint64(x[4*8 : 5*8]) + x5 := binary.LittleEndian.Uint64(x[5*8 : 6*8]) + x6 := binary.LittleEndian.Uint64(x[6*8 : 7*8]) + + y0 := binary.LittleEndian.Uint64(y[0*8 : 1*8]) + y1 := binary.LittleEndian.Uint64(y[1*8 : 2*8]) + y2 := binary.LittleEndian.Uint64(y[2*8 : 3*8]) + y3 := binary.LittleEndian.Uint64(y[3*8 : 4*8]) + y4 := binary.LittleEndian.Uint64(y[4*8 : 5*8]) + y5 := binary.LittleEndian.Uint64(y[5*8 : 6*8]) + y6 := binary.LittleEndian.Uint64(y[6*8 : 7*8]) + + yy := [7]uint64{y0, y1, y2, y3, y4, y5, y6} + zz := [7]uint64{} + + yi := yy[0] + h0, l0 := bits.Mul64(x0, yi) + h1, l1 := bits.Mul64(x1, yi) + h2, l2 := bits.Mul64(x2, yi) + h3, l3 := bits.Mul64(x3, yi) + h4, l4 := bits.Mul64(x4, yi) + h5, l5 := bits.Mul64(x5, yi) + h6, l6 := bits.Mul64(x6, yi) + + zz[0] = l0 + a0, c0 := bits.Add64(h0, l1, 0) + a1, c1 := bits.Add64(h1, l2, c0) + a2, c2 := bits.Add64(h2, l3, c1) + a3, c3 := bits.Add64(h3, l4, c2) + a4, c4 := bits.Add64(h4, l5, c3) + a5, c5 := bits.Add64(h5, l6, c4) + a6, _ := bits.Add64(h6, 0, c5) + + for i := 1; i < 7; i++ { + yi = yy[i] + h0, l0 = bits.Mul64(x0, yi) + h1, l1 = bits.Mul64(x1, yi) + h2, l2 = bits.Mul64(x2, yi) + h3, l3 = bits.Mul64(x3, yi) + h4, l4 = bits.Mul64(x4, yi) + h5, l5 = bits.Mul64(x5, yi) + h6, l6 = bits.Mul64(x6, yi) + + zz[i], c0 = bits.Add64(a0, l0, 0) + a0, c1 = bits.Add64(a1, l1, c0) + a1, c2 = bits.Add64(a2, l2, c1) + a2, c3 = bits.Add64(a3, l3, c2) + a3, c4 = bits.Add64(a4, l4, c3) + a4, c5 = bits.Add64(a5, l5, c4) + a5, a6 = bits.Add64(a6, l6, c5) + + a0, c0 = bits.Add64(a0, h0, 0) + a1, c1 = bits.Add64(a1, h1, c0) + a2, c2 = bits.Add64(a2, h2, c1) + a3, c3 = bits.Add64(a3, h3, c2) + a4, c4 = bits.Add64(a4, h4, c3) + a5, c5 = bits.Add64(a5, h5, c4) + a6, _ = bits.Add64(a6, h6, c5) + } + red64(z, &zz, &[7]uint64{a0, a1, a2, a3, a4, a5, a6}) +} + +func sqrGeneric(z, x *Elt) { mulGeneric(z, x, x) } + +func red64(z *Elt, l, h *[7]uint64) { + /* (2C13, 2C12, 2C11, 2C10|C10, C9, C8, C7) + (C6,...,C0) */ + h0 := h[0] + h1 := h[1] + h2 := h[2] + h3 := ((h[3] & (0xFFFFFFFF << 32)) << 1) | (h[3] & 0xFFFFFFFF) + h4 := (h[3] >> 63) | (h[4] << 1) + h5 := (h[4] >> 63) | (h[5] << 1) + h6 := (h[5] >> 63) | (h[6] << 1) + h7 := (h[6] >> 63) + + l0, c0 := bits.Add64(h0, l[0], 0) + l1, c1 := bits.Add64(h1, l[1], c0) + l2, c2 := bits.Add64(h2, l[2], c1) + l3, c3 := bits.Add64(h3, l[3], c2) + l4, c4 := bits.Add64(h4, l[4], c3) + l5, c5 := bits.Add64(h5, l[5], c4) + l6, c6 := bits.Add64(h6, l[6], c5) + l7, _ := bits.Add64(h7, 0, c6) + + /* (C10C9, C9C8,C8C7,C7C13,C13C12,C12C11,C11C10) + (C6,...,C0) */ + h0 = (h[3] >> 32) | (h[4] << 32) + h1 = (h[4] >> 32) | (h[5] << 32) + h2 = (h[5] >> 32) | (h[6] << 32) + h3 = (h[6] >> 32) | (h[0] << 32) + h4 = (h[0] >> 32) | (h[1] << 32) + h5 = (h[1] >> 32) | (h[2] << 32) + h6 = (h[2] >> 32) | (h[3] << 32) + + l0, c0 = bits.Add64(l0, h0, 0) + l1, c1 = bits.Add64(l1, h1, c0) + l2, c2 = bits.Add64(l2, h2, c1) + l3, c3 = bits.Add64(l3, h3, c2) + l4, c4 = bits.Add64(l4, h4, c3) + l5, c5 = bits.Add64(l5, h5, c4) + l6, c6 = bits.Add64(l6, h6, c5) + l7, _ = bits.Add64(l7, 0, c6) + + /* (C7) + (C6,...,C0) */ + l0, c0 = bits.Add64(l0, l7, 0) + l1, c1 = bits.Add64(l1, 0, c0) + l2, c2 = bits.Add64(l2, 0, c1) + l3, c3 = bits.Add64(l3, l7<<32, c2) + l4, c4 = bits.Add64(l4, 0, c3) + l5, c5 = bits.Add64(l5, 0, c4) + l6, l7 = bits.Add64(l6, 0, c5) + + /* (C7) + (C6,...,C0) */ + l0, c0 = bits.Add64(l0, l7, 0) + l1, c1 = bits.Add64(l1, 0, c0) + l2, c2 = bits.Add64(l2, 0, c1) + l3, c3 = bits.Add64(l3, l7<<32, c2) + l4, c4 = bits.Add64(l4, 0, c3) + l5, c5 = bits.Add64(l5, 0, c4) + l6, _ = bits.Add64(l6, 0, c5) + + binary.LittleEndian.PutUint64(z[0*8:1*8], l0) + binary.LittleEndian.PutUint64(z[1*8:2*8], l1) + binary.LittleEndian.PutUint64(z[2*8:3*8], l2) + binary.LittleEndian.PutUint64(z[3*8:4*8], l3) + binary.LittleEndian.PutUint64(z[4*8:5*8], l4) + binary.LittleEndian.PutUint64(z[5*8:6*8], l5) + binary.LittleEndian.PutUint64(z[6*8:7*8], l6) +} diff --git a/backend/vendor/github.com/cloudflare/circl/math/fp448/fp_noasm.go b/backend/vendor/github.com/cloudflare/circl/math/fp448/fp_noasm.go new file mode 100644 index 0000000..a62225d --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/fp448/fp_noasm.go @@ -0,0 +1,12 @@ +//go:build !amd64 || purego +// +build !amd64 purego + +package fp448 + +func cmov(x, y *Elt, n uint) { cmovGeneric(x, y, n) } +func cswap(x, y *Elt, n uint) { cswapGeneric(x, y, n) } +func add(z, x, y *Elt) { addGeneric(z, x, y) } +func sub(z, x, y *Elt) { subGeneric(z, x, y) } +func addsub(x, y *Elt) { addsubGeneric(x, y) } +func mul(z, x, y *Elt) { mulGeneric(z, x, y) } +func sqr(z, x *Elt) { sqrGeneric(z, x) } diff --git a/backend/vendor/github.com/cloudflare/circl/math/fp448/fuzzer.go b/backend/vendor/github.com/cloudflare/circl/math/fp448/fuzzer.go new file mode 100644 index 0000000..2d7afc8 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/fp448/fuzzer.go @@ -0,0 +1,75 @@ +//go:build gofuzz +// +build gofuzz + +// How to run the fuzzer: +// +// $ go get -u github.com/dvyukov/go-fuzz/go-fuzz +// $ go get -u github.com/dvyukov/go-fuzz/go-fuzz-build +// $ go-fuzz-build -libfuzzer -func FuzzReduction -o lib.a +// $ clang -fsanitize=fuzzer lib.a -o fu.exe +// $ ./fu.exe +package fp448 + +import ( + "encoding/binary" + "fmt" + "math/big" + + "github.com/cloudflare/circl/internal/conv" +) + +// FuzzReduction is a fuzzer target for red64 function, which reduces t +// (112 bits) to a number t' (56 bits) congruent modulo p448. +func FuzzReduction(data []byte) int { + if len(data) != 2*Size { + return -1 + } + var got, want Elt + var lo, hi [7]uint64 + a := data[:Size] + b := data[Size:] + lo[0] = binary.LittleEndian.Uint64(a[0*8 : 1*8]) + lo[1] = binary.LittleEndian.Uint64(a[1*8 : 2*8]) + lo[2] = binary.LittleEndian.Uint64(a[2*8 : 3*8]) + lo[3] = binary.LittleEndian.Uint64(a[3*8 : 4*8]) + lo[4] = binary.LittleEndian.Uint64(a[4*8 : 5*8]) + lo[5] = binary.LittleEndian.Uint64(a[5*8 : 6*8]) + lo[6] = binary.LittleEndian.Uint64(a[6*8 : 7*8]) + + hi[0] = binary.LittleEndian.Uint64(b[0*8 : 1*8]) + hi[1] = binary.LittleEndian.Uint64(b[1*8 : 2*8]) + hi[2] = binary.LittleEndian.Uint64(b[2*8 : 3*8]) + hi[3] = binary.LittleEndian.Uint64(b[3*8 : 4*8]) + hi[4] = binary.LittleEndian.Uint64(b[4*8 : 5*8]) + hi[5] = binary.LittleEndian.Uint64(b[5*8 : 6*8]) + hi[6] = binary.LittleEndian.Uint64(b[6*8 : 7*8]) + + red64(&got, &lo, &hi) + + t := conv.BytesLe2BigInt(data[:2*Size]) + + two448 := big.NewInt(1) + two448.Lsh(two448, 448) // 2^448 + mask448 := big.NewInt(1) + mask448.Sub(two448, mask448) // 2^448-1 + two224plus1 := big.NewInt(1) + two224plus1.Lsh(two224plus1, 224) + two224plus1.Add(two224plus1, big.NewInt(1)) // 2^224+1 + + var loBig, hiBig big.Int + for t.Cmp(two448) >= 0 { + loBig.And(t, mask448) + hiBig.Rsh(t, 448) + t.Mul(&hiBig, two224plus1) + t.Add(t, &loBig) + } + conv.BigInt2BytesLe(want[:], t) + + if got != want { + fmt.Printf("in: %v\n", conv.BytesLe2BigInt(data[:2*Size])) + fmt.Printf("got: %v\n", got) + fmt.Printf("want: %v\n", want) + panic("error found") + } + return 1 +} diff --git a/backend/vendor/github.com/cloudflare/circl/math/integer.go b/backend/vendor/github.com/cloudflare/circl/math/integer.go new file mode 100644 index 0000000..9c80c23 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/integer.go @@ -0,0 +1,16 @@ +package math + +import "math/bits" + +// NextPow2 finds the next power of two (N=2^k, k>=0) greater than n. +// If n is already a power of two, then this function returns n, and log2(n). +func NextPow2(n uint) (N uint, k uint) { + if bits.OnesCount(n) == 1 { + k = uint(bits.TrailingZeros(n)) + N = n + } else { + k = uint(bits.Len(n)) + N = uint(1) << k + } + return +} diff --git a/backend/vendor/github.com/cloudflare/circl/math/mlsbset/mlsbset.go b/backend/vendor/github.com/cloudflare/circl/math/mlsbset/mlsbset.go new file mode 100644 index 0000000..a43851b --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/mlsbset/mlsbset.go @@ -0,0 +1,122 @@ +// Package mlsbset provides a constant-time exponentiation method with precomputation. +// +// References: "Efficient and secure algorithms for GLV-based scalar +// multiplication and their implementation on GLV–GLS curves" by (Faz-Hernandez et al.) +// - https://doi.org/10.1007/s13389-014-0085-7 +// - https://eprint.iacr.org/2013/158 +package mlsbset + +import ( + "errors" + "fmt" + "math/big" + + "github.com/cloudflare/circl/internal/conv" +) + +// EltG is a group element. +type EltG interface{} + +// EltP is a precomputed group element. +type EltP interface{} + +// Group defines the operations required by MLSBSet exponentiation method. +type Group interface { + Identity() EltG // Returns the identity of the group. + Sqr(x EltG) // Calculates x = x^2. + Mul(x EltG, y EltP) // Calculates x = x*y. + NewEltP() EltP // Returns an arbitrary precomputed element. + ExtendedEltP() EltP // Returns the precomputed element x^(2^(w*d)). + Lookup(a EltP, v uint, s, u int32) // Sets a = s*T[v][u]. +} + +// Params contains the parameters of the encoding. +type Params struct { + T uint // T is the maximum size (in bits) of exponents. + V uint // V is the number of tables. + W uint // W is the window size. + E uint // E is the number of digits per table. + D uint // D is the number of digits in total. + L uint // L is the length of the code. +} + +// Encoder allows to convert integers into valid powers. +type Encoder struct{ p Params } + +// New produces an encoder of the MLSBSet algorithm. +func New(t, v, w uint) (Encoder, error) { + if !(t > 1 && v >= 1 && w >= 2) { + return Encoder{}, errors.New("t>1, v>=1, w>=2") + } + e := (t + w*v - 1) / (w * v) + d := e * v + l := d * w + return Encoder{Params{t, v, w, e, d, l}}, nil +} + +// Encode converts an odd integer k into a valid power for exponentiation. +func (m Encoder) Encode(k []byte) (*Power, error) { + if len(k) == 0 { + return nil, errors.New("empty slice") + } + if !(len(k) <= int(m.p.L+7)>>3) { + return nil, errors.New("k too big") + } + if k[0]%2 == 0 { + return nil, errors.New("k must be odd") + } + ap := int((m.p.L+7)/8) - len(k) + k = append(k, make([]byte, ap)...) + s := m.signs(k) + b := make([]int32, m.p.L-m.p.D) + c := conv.BytesLe2BigInt(k) + c.Rsh(c, m.p.D) + var bi big.Int + for i := m.p.D; i < m.p.L; i++ { + c0 := int32(c.Bit(0)) + b[i-m.p.D] = s[i%m.p.D] * c0 + bi.SetInt64(int64(b[i-m.p.D] >> 1)) + c.Rsh(c, 1) + c.Sub(c, &bi) + } + carry := int(c.Int64()) + return &Power{m, s, b, carry}, nil +} + +// signs calculates the set of signs. +func (m Encoder) signs(k []byte) []int32 { + s := make([]int32, m.p.D) + s[m.p.D-1] = 1 + for i := uint(1); i < m.p.D; i++ { + ki := int32((k[i>>3] >> (i & 0x7)) & 0x1) + s[i-1] = 2*ki - 1 + } + return s +} + +// GetParams returns the complementary parameters of the encoding. +func (m Encoder) GetParams() Params { return m.p } + +// tableSize returns the size of each table. +func (m Encoder) tableSize() uint { return 1 << (m.p.W - 1) } + +// Elts returns the total number of elements that must be precomputed. +func (m Encoder) Elts() uint { return m.p.V * m.tableSize() } + +// IsExtended returns true if the element x^(2^(wd)) must be calculated. +func (m Encoder) IsExtended() bool { q := m.p.T / (m.p.V * m.p.W); return m.p.T == q*m.p.V*m.p.W } + +// Ops returns the number of squares and multiplications executed during an exponentiation. +func (m Encoder) Ops() (S uint, M uint) { + S = m.p.E + M = m.p.E * m.p.V + if m.IsExtended() { + M++ + } + return +} + +func (m Encoder) String() string { + return fmt.Sprintf("T: %v W: %v V: %v e: %v d: %v l: %v wv|t: %v", + m.p.T, m.p.W, m.p.V, m.p.E, m.p.D, m.p.L, m.IsExtended()) +} diff --git a/backend/vendor/github.com/cloudflare/circl/math/mlsbset/power.go b/backend/vendor/github.com/cloudflare/circl/math/mlsbset/power.go new file mode 100644 index 0000000..3f214c3 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/mlsbset/power.go @@ -0,0 +1,64 @@ +package mlsbset + +import "fmt" + +// Power is a valid exponent produced by the MLSBSet encoding algorithm. +type Power struct { + set Encoder // parameters of code. + s []int32 // set of signs. + b []int32 // set of digits. + c int // carry is {0,1}. +} + +// Exp is calculates x^k, where x is a predetermined element of a group G. +func (p *Power) Exp(G Group) EltG { + a, b := G.Identity(), G.NewEltP() + for e := int(p.set.p.E - 1); e >= 0; e-- { + G.Sqr(a) + for v := uint(0); v < p.set.p.V; v++ { + sgnElt, idElt := p.Digit(v, uint(e)) + G.Lookup(b, v, sgnElt, idElt) + G.Mul(a, b) + } + } + if p.set.IsExtended() && p.c == 1 { + G.Mul(a, G.ExtendedEltP()) + } + return a +} + +// Digit returns the (v,e)-th digit and its sign. +func (p *Power) Digit(v, e uint) (sgn, dig int32) { + sgn = p.bit(0, v, e) + dig = 0 + for i := p.set.p.W - 1; i > 0; i-- { + dig = 2*dig + p.bit(i, v, e) + } + mask := dig >> 31 + dig = (dig + mask) ^ mask + return sgn, dig +} + +// bit returns the (w,v,e)-th bit of the code. +func (p *Power) bit(w, v, e uint) int32 { + if !(w < p.set.p.W && + v < p.set.p.V && + e < p.set.p.E) { + panic(fmt.Errorf("indexes outside (%v,%v,%v)", w, v, e)) + } + if w == 0 { + return p.s[p.set.p.E*v+e] + } + return p.b[p.set.p.D*(w-1)+p.set.p.E*v+e] +} + +func (p *Power) String() string { + dig := "" + for j := uint(0); j < p.set.p.V; j++ { + for i := uint(0); i < p.set.p.E; i++ { + s, d := p.Digit(j, i) + dig += fmt.Sprintf("(%2v,%2v) = %+2v %+2v\n", j, i, s, d) + } + } + return fmt.Sprintf("len: %v\ncarry: %v\ndigits:\n%v", len(p.b)+len(p.s), p.c, dig) +} diff --git a/backend/vendor/github.com/cloudflare/circl/math/primes.go b/backend/vendor/github.com/cloudflare/circl/math/primes.go new file mode 100644 index 0000000..158fd83 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/primes.go @@ -0,0 +1,34 @@ +package math + +import ( + "crypto/rand" + "io" + "math/big" +) + +// IsSafePrime reports whether p is (probably) a safe prime. +// The prime p=2*q+1 is safe prime if both p and q are primes. +// Note that ProbablyPrime is not suitable for judging primes +// that an adversary may have crafted to fool the test. +func IsSafePrime(p *big.Int) bool { + pdiv2 := new(big.Int).Rsh(p, 1) + return p.ProbablyPrime(20) && pdiv2.ProbablyPrime(20) +} + +// SafePrime returns a number of the given bit length that is a safe prime with high probability. +// The number returned p=2*q+1 is a safe prime if both p and q are primes. +// SafePrime will return error for any error returned by rand.Read or if bits < 2. +func SafePrime(random io.Reader, bits int) (*big.Int, error) { + one := big.NewInt(1) + p := new(big.Int) + for { + q, err := rand.Prime(random, bits-1) + if err != nil { + return nil, err + } + p.Lsh(q, 1).Add(p, one) + if p.ProbablyPrime(20) { + return p, nil + } + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/math/wnaf.go b/backend/vendor/github.com/cloudflare/circl/math/wnaf.go new file mode 100644 index 0000000..94a1ec5 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/math/wnaf.go @@ -0,0 +1,84 @@ +// Package math provides some utility functions for big integers. +package math + +import "math/big" + +// SignedDigit obtains the signed-digit recoding of n and returns a list L of +// digits such that n = sum( L[i]*2^(i*(w-1)) ), and each L[i] is an odd number +// in the set {±1, ±3, ..., ±2^(w-1)-1}. The third parameter ensures that the +// output has ceil(l/(w-1)) digits. +// +// Restrictions: +// - n is odd and n > 0. +// - 1 < w < 32. +// - l >= bit length of n. +// +// References: +// - Alg.6 in "Exponent Recoding and Regular Exponentiation Algorithms" +// by Joye-Tunstall. http://doi.org/10.1007/978-3-642-02384-2_21 +// - Alg.6 in "Selecting Elliptic Curves for Cryptography: An Efficiency and +// Security Analysis" by Bos et al. http://doi.org/10.1007/s13389-015-0097-y +func SignedDigit(n *big.Int, w, l uint) []int32 { + if n.Sign() <= 0 || n.Bit(0) == 0 { + panic("n must be non-zero, odd, and positive") + } + if w <= 1 || w >= 32 { + panic("Verify that 1 < w < 32") + } + if uint(n.BitLen()) > l { + panic("n is too big to fit in l digits") + } + lenN := (l + (w - 1) - 1) / (w - 1) // ceil(l/(w-1)) + L := make([]int32, lenN+1) + var k, v big.Int + k.Set(n) + + var i uint + for i = 0; i < lenN; i++ { + words := k.Bits() + value := int32(words[0] & ((1 << w) - 1)) + value -= int32(1) << (w - 1) + L[i] = value + v.SetInt64(int64(value)) + k.Sub(&k, &v) + k.Rsh(&k, w-1) + } + L[i] = int32(k.Int64()) + return L +} + +// OmegaNAF obtains the window-w Non-Adjacent Form of a positive number n and +// 1 < w < 32. The returned slice L holds n = sum( L[i]*2^i ). +// +// Reference: +// - Alg.9 "Efficient arithmetic on Koblitz curves" by Solinas. +// http://doi.org/10.1023/A:1008306223194 +func OmegaNAF(n *big.Int, w uint) (L []int32) { + if n.Sign() < 0 { + panic("n must be positive") + } + if w <= 1 || w >= 32 { + panic("Verify that 1 < w < 32") + } + + L = make([]int32, n.BitLen()+1) + var k, v big.Int + k.Set(n) + + i := 0 + for ; k.Sign() > 0; i++ { + value := int32(0) + if k.Bit(0) == 1 { + words := k.Bits() + value = int32(words[0] & ((1 << w) - 1)) + if value >= (int32(1) << (w - 1)) { + value -= int32(1) << w + } + v.SetInt64(int64(value)) + k.Sub(&k, &v) + } + L[i] = value + k.Rsh(&k, 1) + } + return L[:i] +} diff --git a/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/amd64.go b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/amd64.go new file mode 100644 index 0000000..2c96563 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/amd64.go @@ -0,0 +1,302 @@ +//go:build amd64 && !purego +// +build amd64,!purego + +package common + +import ( + "golang.org/x/sys/cpu" +) + +// ZetasAVX2 contains all ζ used in NTT (like the Zetas array), but also +// the values int16(zeta * 62209) for each zeta, which is used in +// Montgomery reduction. There is some duplication and reordering as +// compared to Zetas to make it more convenient for use with AVX2. +var ZetasAVX2 = [...]int16{ + // level 1: int16(Zetas[1]*62209) and Zetas[1] + 31499, 2571, + + // level 2 + // + // int16(Zetas[2]*62209), Zetas[2], int16(Zetas[3]*62209), Zetas[3] + 14746, 2970, 788, 1812, + + // level 3, like level 2. + 13525, 1493, -12402, 1422, 28191, 287, -16694, 202, + + 0, 0, // padding + + // layer 4. offset: 1*16 + // + // The precomputed multiplication and zetas are grouped by 16 at a + // time as used in the set of butterflies, etc. + -20906, -20906, -20906, -20906, -20906, -20906, -20906, -20906, + 27758, 27758, 27758, 27758, 27758, 27758, 27758, 27758, + 3158, 3158, 3158, 3158, 3158, 3158, 3158, 3158, + 622, 622, 622, 622, 622, 622, 622, 622, + -3799, -3799, -3799, -3799, -3799, -3799, -3799, -3799, + -15690, -15690, -15690, -15690, -15690, -15690, -15690, -15690, + 1577, 1577, 1577, 1577, 1577, 1577, 1577, 1577, + 182, 182, 182, 182, 182, 182, 182, 182, + 10690, 10690, 10690, 10690, 10690, 10690, 10690, 10690, + 1359, 1359, 1359, 1359, 1359, 1359, 1359, 1359, + 962, 962, 962, 962, 962, 962, 962, 962, + 2127, 2127, 2127, 2127, 2127, 2127, 2127, 2127, + -11201, -11201, -11201, -11201, -11201, -11201, -11201, -11201, + 31164, 31164, 31164, 31164, 31164, 31164, 31164, 31164, + 1855, 1855, 1855, 1855, 1855, 1855, 1855, 1855, + 1468, 1468, 1468, 1468, 1468, 1468, 1468, 1468, + + // layer 5. offset: 9*16 + -5827, -5827, -5827, -5827, 17364, 17364, 17364, 17364, + -26360, -26360, -26360, -26360, -29057, -29057, -29057, -29057, + 573, 573, 573, 573, 2004, 2004, 2004, 2004, + 264, 264, 264, 264, 383, 383, 383, 383, + 5572, 5572, 5572, 5572, -1102, -1102, -1102, -1102, + 21439, 21439, 21439, 21439, -26241, -26241, -26241, -26241, + 2500, 2500, 2500, 2500, 1458, 1458, 1458, 1458, + 1727, 1727, 1727, 1727, 3199, 3199, 3199, 3199, + -28072, -28072, -28072, -28072, 24313, 24313, 24313, 24313, + -10532, -10532, -10532, -10532, 8800, 8800, 8800, 8800, + 2648, 2648, 2648, 2648, 1017, 1017, 1017, 1017, + 732, 732, 732, 732, 608, 608, 608, 608, + 18427, 18427, 18427, 18427, 8859, 8859, 8859, 8859, + 26676, 26676, 26676, 26676, -16162, -16162, -16162, -16162, + 1787, 1787, 1787, 1787, 411, 411, 411, 411, + 3124, 3124, 3124, 3124, 1758, 1758, 1758, 1758, + + // layer 6. offset: 17*16 + -5689, -5689, -6516, -6516, 1497, 1497, 30967, 30967, + -23564, -23564, 20179, 20179, 20711, 20711, 25081, 25081, + 1223, 1223, 652, 652, 2777, 2777, 1015, 1015, + 2036, 2036, 1491, 1491, 3047, 3047, 1785, 1785, + -12796, -12796, 26617, 26617, 16065, 16065, -12441, -12441, + 9135, 9135, -649, -649, -25986, -25986, 27837, 27837, + 516, 516, 3321, 3321, 3009, 3009, 2663, 2663, + 1711, 1711, 2167, 2167, 126, 126, 1469, 1469, + 19884, 19884, -28249, -28249, -15886, -15886, -8898, -8898, + -28309, -28309, 9076, 9076, -30198, -30198, 18250, 18250, + 2476, 2476, 3239, 3239, 3058, 3058, 830, 830, + 107, 107, 1908, 1908, 3082, 3082, 2378, 2378, + 13427, 13427, 14017, 14017, -29155, -29155, -12756, -12756, + 16832, 16832, 4312, 4312, -24155, -24155, -17914, -17914, + 2931, 2931, 961, 961, 1821, 1821, 2604, 2604, + 448, 448, 2264, 2264, 677, 677, 2054, 2054, + + // layer 7. offset: 25*16 + -334, 11182, -11477, 13387, -32226, -14233, 20494, -21655, + -27738, 13131, 945, -4586, -14882, 23093, 6182, 5493, + 2226, 430, 555, 843, 2078, 871, 1550, 105, + 422, 587, 177, 3094, 3038, 2869, 1574, 1653, + 32011, -32502, 10631, 30318, 29176, -18741, -28761, 12639, + -18485, 20100, 17561, 18525, -14430, 19529, -5275, -12618, + 3083, 778, 1159, 3182, 2552, 1483, 2727, 1119, + 1739, 644, 2457, 349, 418, 329, 3173, 3254, + -31183, 20297, 25435, 2146, -7382, 15356, 24392, -32384, + -20926, -6279, 10946, -14902, 24215, -11044, 16990, 14470, + 817, 1097, 603, 610, 1322, 2044, 1864, 384, + 2114, 3193, 1218, 1994, 2455, 220, 2142, 1670, + 10336, -21497, -7933, -20198, -22501, 23211, 10907, -17442, + 31637, -23859, 28644, -20257, 23998, 7757, -17422, 23132, + 2144, 1799, 2051, 794, 1819, 2475, 2459, 478, + 3221, 3021, 996, 991, 958, 1869, 1522, 1628, + + // layer 1 inverse + 23132, -17422, 7757, 23998, -20257, 28644, -23859, 31637, + -17442, 10907, 23211, -22501, -20198, -7933, -21497, 10336, + 1628, 1522, 1869, 958, 991, 996, 3021, 3221, + 478, 2459, 2475, 1819, 794, 2051, 1799, 2144, + 14470, 16990, -11044, 24215, -14902, 10946, -6279, -20926, + -32384, 24392, 15356, -7382, 2146, 25435, 20297, -31183, + 1670, 2142, 220, 2455, 1994, 1218, 3193, 2114, + 384, 1864, 2044, 1322, 610, 603, 1097, 817, + -12618, -5275, 19529, -14430, 18525, 17561, 20100, -18485, + 12639, -28761, -18741, 29176, 30318, 10631, -32502, 32011, + 3254, 3173, 329, 418, 349, 2457, 644, 1739, + 1119, 2727, 1483, 2552, 3182, 1159, 778, 3083, + 5493, 6182, 23093, -14882, -4586, 945, 13131, -27738, + -21655, 20494, -14233, -32226, 13387, -11477, 11182, -334, + 1653, 1574, 2869, 3038, 3094, 177, 587, 422, + 105, 1550, 871, 2078, 843, 555, 430, 2226, + + // layer 2 inverse + -17914, -17914, -24155, -24155, 4312, 4312, 16832, 16832, + -12756, -12756, -29155, -29155, 14017, 14017, 13427, 13427, + 2054, 2054, 677, 677, 2264, 2264, 448, 448, + 2604, 2604, 1821, 1821, 961, 961, 2931, 2931, + 18250, 18250, -30198, -30198, 9076, 9076, -28309, -28309, + -8898, -8898, -15886, -15886, -28249, -28249, 19884, 19884, + 2378, 2378, 3082, 3082, 1908, 1908, 107, 107, + 830, 830, 3058, 3058, 3239, 3239, 2476, 2476, + 27837, 27837, -25986, -25986, -649, -649, 9135, 9135, + -12441, -12441, 16065, 16065, 26617, 26617, -12796, -12796, + 1469, 1469, 126, 126, 2167, 2167, 1711, 1711, + 2663, 2663, 3009, 3009, 3321, 3321, 516, 516, + 25081, 25081, 20711, 20711, 20179, 20179, -23564, -23564, + 30967, 30967, 1497, 1497, -6516, -6516, -5689, -5689, + 1785, 1785, 3047, 3047, 1491, 1491, 2036, 2036, + 1015, 1015, 2777, 2777, 652, 652, 1223, 1223, + + // layer 3 inverse + -16162, -16162, -16162, -16162, 26676, 26676, 26676, 26676, + 8859, 8859, 8859, 8859, 18427, 18427, 18427, 18427, + 1758, 1758, 1758, 1758, 3124, 3124, 3124, 3124, + 411, 411, 411, 411, 1787, 1787, 1787, 1787, + 8800, 8800, 8800, 8800, -10532, -10532, -10532, -10532, + 24313, 24313, 24313, 24313, -28072, -28072, -28072, -28072, + 608, 608, 608, 608, 732, 732, 732, 732, + 1017, 1017, 1017, 1017, 2648, 2648, 2648, 2648, + -26241, -26241, -26241, -26241, 21439, 21439, 21439, 21439, + -1102, -1102, -1102, -1102, 5572, 5572, 5572, 5572, + 3199, 3199, 3199, 3199, 1727, 1727, 1727, 1727, + 1458, 1458, 1458, 1458, 2500, 2500, 2500, 2500, + -29057, -29057, -29057, -29057, -26360, -26360, -26360, -26360, + 17364, 17364, 17364, 17364, -5827, -5827, -5827, -5827, + 383, 383, 383, 383, 264, 264, 264, 264, + 2004, 2004, 2004, 2004, 573, 573, 573, 573, + + // layer 4 inverse + 31164, 31164, 31164, 31164, 31164, 31164, 31164, 31164, + -11201, -11201, -11201, -11201, -11201, -11201, -11201, -11201, + 1468, 1468, 1468, 1468, 1468, 1468, 1468, 1468, + 1855, 1855, 1855, 1855, 1855, 1855, 1855, 1855, + 1359, 1359, 1359, 1359, 1359, 1359, 1359, 1359, + 10690, 10690, 10690, 10690, 10690, 10690, 10690, 10690, + 2127, 2127, 2127, 2127, 2127, 2127, 2127, 2127, + 962, 962, 962, 962, 962, 962, 962, 962, + -15690, -15690, -15690, -15690, -15690, -15690, -15690, -15690, + -3799, -3799, -3799, -3799, -3799, -3799, -3799, -3799, + 182, 182, 182, 182, 182, 182, 182, 182, + 1577, 1577, 1577, 1577, 1577, 1577, 1577, 1577, + 27758, 27758, 27758, 27758, 27758, 27758, 27758, 27758, + -20906, -20906, -20906, -20906, -20906, -20906, -20906, -20906, + 622, 622, 622, 622, 622, 622, 622, 622, + 3158, 3158, 3158, 3158, 3158, 3158, 3158, 3158, + + // layer 5 inverse + -16694, 202, 28191, 287, -12402, 1422, 13525, 1493, + + // layer 6 inverse + 788, 1812, 14746, 2970, + + // layer 7 inverse + 31499, 2571, +} + +// Sets p to a + b. Does not normalize coefficients. +func (p *Poly) Add(a, b *Poly) { + if cpu.X86.HasAVX2 { + addAVX2( + (*[N]int16)(p), + (*[N]int16)(a), + (*[N]int16)(b), + ) + } else { + p.addGeneric(a, b) + } +} + +// Sets p to a - b. Does not normalize coefficients. +func (p *Poly) Sub(a, b *Poly) { + if cpu.X86.HasAVX2 { + subAVX2( + (*[N]int16)(p), + (*[N]int16)(a), + (*[N]int16)(b), + ) + } else { + p.subGeneric(a, b) + } +} + +// Executes an in-place forward "NTT" on p. +// +// Assumes the coefficients are in absolute value ≤q. The resulting +// coefficients are in absolute value ≤7q. If the input is in Montgomery +// form, then the result is in Montgomery form and so (by linearity of the NTT) +// if the input is in regular form, then the result is also in regular form. +// The order of coefficients will be "tangled". These can be put back into +// their proper order by calling Detangle(). +func (p *Poly) NTT() { + if cpu.X86.HasAVX2 { + nttAVX2((*[N]int16)(p)) + } else { + p.nttGeneric() + } +} + +// Executes an in-place inverse "NTT" on p and multiply by the Montgomery +// factor R. +// +// Requires coefficients to be in "tangled" order, see Tangle(). +// Assumes the coefficients are in absolute value ≤q. The resulting +// coefficients are in absolute value ≤q. If the input is in Montgomery +// form, then the result is in Montgomery form and so (by linearity) +// if the input is in regular form, then the result is also in regular form. +func (p *Poly) InvNTT() { + if cpu.X86.HasAVX2 { + invNttAVX2((*[N]int16)(p)) + } else { + p.invNTTGeneric() + } +} + +// Sets p to the "pointwise" multiplication of a and b. +// +// That is: InvNTT(p) = InvNTT(a) * InvNTT(b). Assumes a and b are in +// Montgomery form. Products between coefficients of a and b must be strictly +// bounded in absolute value by 2¹⁵q. p will be in Montgomery form and +// bounded in absolute value by 2q. +// +// Requires a and b to be in "tangled" order, see Tangle(). p will be in +// tangled order as well. +func (p *Poly) MulHat(a, b *Poly) { + if cpu.X86.HasAVX2 { + mulHatAVX2( + (*[N]int16)(p), + (*[N]int16)(a), + (*[N]int16)(b), + ) + } else { + p.mulHatGeneric(a, b) + } +} + +// Puts p into the right form to be used with (among others) InvNTT(). +func (p *Poly) Tangle() { + if cpu.X86.HasAVX2 { + tangleAVX2((*[N]int16)(p)) + } + + // When AVX2 is not available, we use the standard order. +} + +// Puts p back into standard form. +func (p *Poly) Detangle() { + if cpu.X86.HasAVX2 { + detangleAVX2((*[N]int16)(p)) + } + + // When AVX2 is not available, we use the standard order. +} + +// Almost normalizes coefficients. +// +// Ensures each coefficient is in {0, …, q}. +func (p *Poly) BarrettReduce() { + if cpu.X86.HasAVX2 { + barrettReduceAVX2((*[N]int16)(p)) + } else { + p.barrettReduceGeneric() + } +} + +// Normalizes coefficients. +// +// Ensures each coefficient is in {0, …, q-1}. +func (p *Poly) Normalize() { + if cpu.X86.HasAVX2 { + normalizeAVX2((*[N]int16)(p)) + } else { + p.normalizeGeneric() + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/amd64.s b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/amd64.s new file mode 100644 index 0000000..5c7536b --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/amd64.s @@ -0,0 +1,2354 @@ +// Code generated by command: go run src.go -out ../amd64.s -stubs ../stubs_amd64.go -pkg common. DO NOT EDIT. + +//go:build amd64 && !purego + +#include "textflag.h" + +// func addAVX2(p *[256]int16, a *[256]int16, b *[256]int16) +// Requires: AVX, AVX2 +TEXT ·addAVX2(SB), NOSPLIT, $0-24 + MOVQ p+0(FP), AX + MOVQ a+8(FP), CX + MOVQ b+16(FP), DX + VMOVDQU (CX), Y0 + VMOVDQU 32(CX), Y2 + VMOVDQU 64(CX), Y4 + VMOVDQU 96(CX), Y6 + VMOVDQU 128(CX), Y8 + VMOVDQU 160(CX), Y10 + VMOVDQU 192(CX), Y12 + VMOVDQU 224(CX), Y14 + VMOVDQU (DX), Y1 + VMOVDQU 32(DX), Y3 + VMOVDQU 64(DX), Y5 + VMOVDQU 96(DX), Y7 + VMOVDQU 128(DX), Y9 + VMOVDQU 160(DX), Y11 + VMOVDQU 192(DX), Y13 + VMOVDQU 224(DX), Y15 + VPADDW Y0, Y1, Y1 + VPADDW Y2, Y3, Y3 + VPADDW Y4, Y5, Y5 + VPADDW Y6, Y7, Y7 + VPADDW Y8, Y9, Y9 + VPADDW Y10, Y11, Y11 + VPADDW Y12, Y13, Y13 + VPADDW Y14, Y15, Y15 + VMOVDQU Y1, (AX) + VMOVDQU Y3, 32(AX) + VMOVDQU Y5, 64(AX) + VMOVDQU Y7, 96(AX) + VMOVDQU Y9, 128(AX) + VMOVDQU Y11, 160(AX) + VMOVDQU Y13, 192(AX) + VMOVDQU Y15, 224(AX) + VMOVDQU 256(CX), Y0 + VMOVDQU 288(CX), Y2 + VMOVDQU 320(CX), Y4 + VMOVDQU 352(CX), Y6 + VMOVDQU 384(CX), Y8 + VMOVDQU 416(CX), Y10 + VMOVDQU 448(CX), Y12 + VMOVDQU 480(CX), Y14 + VMOVDQU 256(DX), Y1 + VMOVDQU 288(DX), Y3 + VMOVDQU 320(DX), Y5 + VMOVDQU 352(DX), Y7 + VMOVDQU 384(DX), Y9 + VMOVDQU 416(DX), Y11 + VMOVDQU 448(DX), Y13 + VMOVDQU 480(DX), Y15 + VPADDW Y0, Y1, Y1 + VPADDW Y2, Y3, Y3 + VPADDW Y4, Y5, Y5 + VPADDW Y6, Y7, Y7 + VPADDW Y8, Y9, Y9 + VPADDW Y10, Y11, Y11 + VPADDW Y12, Y13, Y13 + VPADDW Y14, Y15, Y15 + VMOVDQU Y1, 256(AX) + VMOVDQU Y3, 288(AX) + VMOVDQU Y5, 320(AX) + VMOVDQU Y7, 352(AX) + VMOVDQU Y9, 384(AX) + VMOVDQU Y11, 416(AX) + VMOVDQU Y13, 448(AX) + VMOVDQU Y15, 480(AX) + RET + +// func subAVX2(p *[256]int16, a *[256]int16, b *[256]int16) +// Requires: AVX, AVX2 +TEXT ·subAVX2(SB), NOSPLIT, $0-24 + MOVQ p+0(FP), AX + MOVQ a+8(FP), CX + MOVQ b+16(FP), DX + VMOVDQU (CX), Y0 + VMOVDQU 32(CX), Y2 + VMOVDQU 64(CX), Y4 + VMOVDQU 96(CX), Y6 + VMOVDQU 128(CX), Y8 + VMOVDQU 160(CX), Y10 + VMOVDQU 192(CX), Y12 + VMOVDQU 224(CX), Y14 + VMOVDQU (DX), Y1 + VMOVDQU 32(DX), Y3 + VMOVDQU 64(DX), Y5 + VMOVDQU 96(DX), Y7 + VMOVDQU 128(DX), Y9 + VMOVDQU 160(DX), Y11 + VMOVDQU 192(DX), Y13 + VMOVDQU 224(DX), Y15 + VPSUBW Y1, Y0, Y1 + VPSUBW Y3, Y2, Y3 + VPSUBW Y5, Y4, Y5 + VPSUBW Y7, Y6, Y7 + VPSUBW Y9, Y8, Y9 + VPSUBW Y11, Y10, Y11 + VPSUBW Y13, Y12, Y13 + VPSUBW Y15, Y14, Y15 + VMOVDQU Y1, (AX) + VMOVDQU Y3, 32(AX) + VMOVDQU Y5, 64(AX) + VMOVDQU Y7, 96(AX) + VMOVDQU Y9, 128(AX) + VMOVDQU Y11, 160(AX) + VMOVDQU Y13, 192(AX) + VMOVDQU Y15, 224(AX) + VMOVDQU 256(CX), Y0 + VMOVDQU 288(CX), Y2 + VMOVDQU 320(CX), Y4 + VMOVDQU 352(CX), Y6 + VMOVDQU 384(CX), Y8 + VMOVDQU 416(CX), Y10 + VMOVDQU 448(CX), Y12 + VMOVDQU 480(CX), Y14 + VMOVDQU 256(DX), Y1 + VMOVDQU 288(DX), Y3 + VMOVDQU 320(DX), Y5 + VMOVDQU 352(DX), Y7 + VMOVDQU 384(DX), Y9 + VMOVDQU 416(DX), Y11 + VMOVDQU 448(DX), Y13 + VMOVDQU 480(DX), Y15 + VPSUBW Y1, Y0, Y1 + VPSUBW Y3, Y2, Y3 + VPSUBW Y5, Y4, Y5 + VPSUBW Y7, Y6, Y7 + VPSUBW Y9, Y8, Y9 + VPSUBW Y11, Y10, Y11 + VPSUBW Y13, Y12, Y13 + VPSUBW Y15, Y14, Y15 + VMOVDQU Y1, 256(AX) + VMOVDQU Y3, 288(AX) + VMOVDQU Y5, 320(AX) + VMOVDQU Y7, 352(AX) + VMOVDQU Y9, 384(AX) + VMOVDQU Y11, 416(AX) + VMOVDQU Y13, 448(AX) + VMOVDQU Y15, 480(AX) + RET + +// func nttAVX2(p *[256]int16) +// Requires: AVX, AVX2 +TEXT ·nttAVX2(SB), NOSPLIT, $0-8 + MOVQ p+0(FP), AX + LEAQ ·ZetasAVX2+0(SB), CX + MOVL $0x00000d01, DX + VMOVD DX, X0 + VPBROADCASTW X0, Y15 + VPBROADCASTW (CX), Y0 + VPBROADCASTW 2(CX), Y1 + VMOVDQU (AX), Y7 + VMOVDQU 32(AX), Y8 + VMOVDQU 64(AX), Y9 + VMOVDQU 96(AX), Y10 + VMOVDQU 256(AX), Y11 + VMOVDQU 288(AX), Y12 + VMOVDQU 320(AX), Y13 + VMOVDQU 352(AX), Y14 + VPMULLW Y11, Y0, Y2 + VPMULLW Y12, Y0, Y3 + VPMULLW Y13, Y0, Y4 + VPMULLW Y14, Y0, Y5 + VPMULHW Y11, Y1, Y11 + VPMULHW Y12, Y1, Y12 + VPMULHW Y13, Y1, Y13 + VPMULHW Y14, Y1, Y14 + VPMULHW Y2, Y15, Y2 + VPMULHW Y3, Y15, Y3 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPSUBW Y2, Y11, Y2 + VPSUBW Y3, Y12, Y3 + VPSUBW Y4, Y13, Y4 + VPSUBW Y5, Y14, Y5 + VPSUBW Y2, Y7, Y11 + VPSUBW Y3, Y8, Y12 + VPSUBW Y4, Y9, Y13 + VPSUBW Y5, Y10, Y14 + VPADDW Y2, Y7, Y7 + VPADDW Y3, Y8, Y8 + VPADDW Y4, Y9, Y9 + VPADDW Y5, Y10, Y10 + VMOVDQU Y7, (AX) + VMOVDQU Y8, 32(AX) + VMOVDQU Y9, 64(AX) + VMOVDQU Y10, 96(AX) + VMOVDQU Y11, 256(AX) + VMOVDQU Y12, 288(AX) + VMOVDQU Y13, 320(AX) + VMOVDQU Y14, 352(AX) + VMOVDQU 128(AX), Y7 + VMOVDQU 160(AX), Y8 + VMOVDQU 192(AX), Y9 + VMOVDQU 224(AX), Y10 + VMOVDQU 384(AX), Y11 + VMOVDQU 416(AX), Y12 + VMOVDQU 448(AX), Y13 + VMOVDQU 480(AX), Y14 + VPMULLW Y11, Y0, Y2 + VPMULLW Y12, Y0, Y3 + VPMULLW Y13, Y0, Y4 + VPMULLW Y14, Y0, Y5 + VPMULHW Y11, Y1, Y11 + VPMULHW Y12, Y1, Y12 + VPMULHW Y13, Y1, Y13 + VPMULHW Y14, Y1, Y14 + VPMULHW Y2, Y15, Y2 + VPMULHW Y3, Y15, Y3 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPSUBW Y2, Y11, Y2 + VPSUBW Y3, Y12, Y3 + VPSUBW Y4, Y13, Y4 + VPSUBW Y5, Y14, Y5 + VPSUBW Y2, Y7, Y11 + VPSUBW Y3, Y8, Y12 + VPSUBW Y4, Y9, Y13 + VPSUBW Y5, Y10, Y14 + VPADDW Y2, Y7, Y7 + VPADDW Y3, Y8, Y8 + VPADDW Y4, Y9, Y9 + VPADDW Y5, Y10, Y10 + VMOVDQU Y7, 128(AX) + VMOVDQU Y8, 160(AX) + VMOVDQU Y9, 192(AX) + VMOVDQU Y10, 224(AX) + VMOVDQU Y11, 384(AX) + VMOVDQU Y12, 416(AX) + VMOVDQU Y13, 448(AX) + VMOVDQU Y14, 480(AX) + VPBROADCASTW 4(CX), Y0 + VPBROADCASTW 6(CX), Y1 + VMOVDQU (AX), Y7 + VMOVDQU 32(AX), Y8 + VMOVDQU 64(AX), Y9 + VMOVDQU 96(AX), Y10 + VMOVDQU 128(AX), Y11 + VMOVDQU 160(AX), Y12 + VMOVDQU 192(AX), Y13 + VMOVDQU 224(AX), Y14 + VPMULLW Y11, Y0, Y2 + VPMULLW Y12, Y0, Y3 + VPMULLW Y13, Y0, Y4 + VPMULLW Y14, Y0, Y5 + VPMULHW Y11, Y1, Y11 + VPMULHW Y12, Y1, Y12 + VPMULHW Y13, Y1, Y13 + VPMULHW Y14, Y1, Y14 + VPMULHW Y2, Y15, Y2 + VPMULHW Y3, Y15, Y3 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPSUBW Y2, Y11, Y2 + VPSUBW Y3, Y12, Y3 + VPSUBW Y4, Y13, Y4 + VPSUBW Y5, Y14, Y5 + VPSUBW Y2, Y7, Y11 + VPSUBW Y3, Y8, Y12 + VPSUBW Y4, Y9, Y13 + VPSUBW Y5, Y10, Y14 + VPADDW Y2, Y7, Y7 + VPADDW Y3, Y8, Y8 + VPADDW Y4, Y9, Y9 + VPADDW Y5, Y10, Y10 + VPBROADCASTW 12(CX), Y0 + VPBROADCASTW 14(CX), Y1 + VPBROADCASTW 16(CX), Y2 + VPBROADCASTW 18(CX), Y3 + VPMULLW Y9, Y0, Y4 + VPMULLW Y10, Y0, Y5 + VPMULLW Y13, Y2, Y6 + VPMULLW Y14, Y2, Y0 + VPMULHW Y9, Y1, Y9 + VPMULHW Y10, Y1, Y10 + VPMULHW Y13, Y3, Y13 + VPMULHW Y14, Y3, Y14 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPMULHW Y6, Y15, Y6 + VPMULHW Y0, Y15, Y0 + VPSUBW Y4, Y9, Y4 + VPSUBW Y5, Y10, Y5 + VPSUBW Y6, Y13, Y6 + VPSUBW Y0, Y14, Y0 + VPSUBW Y4, Y7, Y9 + VPSUBW Y5, Y8, Y10 + VPSUBW Y6, Y11, Y13 + VPSUBW Y0, Y12, Y14 + VPADDW Y4, Y7, Y7 + VPADDW Y5, Y8, Y8 + VPADDW Y6, Y11, Y11 + VPADDW Y0, Y12, Y12 + VMOVDQU 32(CX), Y0 + VMOVDQU 64(CX), Y1 + VMOVDQU 96(CX), Y2 + VMOVDQU 128(CX), Y3 + VPERM2I128 $0x20, Y9, Y7, Y4 + VPERM2I128 $0x31, Y9, Y7, Y9 + VMOVDQA Y4, Y7 + VPERM2I128 $0x20, Y10, Y8, Y4 + VPERM2I128 $0x31, Y10, Y8, Y10 + VMOVDQA Y4, Y8 + VPERM2I128 $0x20, Y13, Y11, Y4 + VPERM2I128 $0x31, Y13, Y11, Y13 + VMOVDQA Y4, Y11 + VPERM2I128 $0x20, Y14, Y12, Y4 + VPERM2I128 $0x31, Y14, Y12, Y14 + VMOVDQA Y4, Y12 + VPMULLW Y8, Y0, Y4 + VPMULLW Y10, Y0, Y5 + VPMULLW Y12, Y2, Y6 + VPMULLW Y14, Y2, Y0 + VPMULHW Y8, Y1, Y8 + VPMULHW Y10, Y1, Y10 + VPMULHW Y12, Y3, Y12 + VPMULHW Y14, Y3, Y14 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPMULHW Y6, Y15, Y6 + VPMULHW Y0, Y15, Y0 + VPSUBW Y4, Y8, Y4 + VPSUBW Y5, Y10, Y5 + VPSUBW Y6, Y12, Y6 + VPSUBW Y0, Y14, Y0 + VPSUBW Y4, Y7, Y8 + VPSUBW Y5, Y9, Y10 + VPSUBW Y6, Y11, Y12 + VPSUBW Y0, Y13, Y14 + VPADDW Y4, Y7, Y7 + VPADDW Y5, Y9, Y9 + VPADDW Y6, Y11, Y11 + VPADDW Y0, Y13, Y13 + VMOVDQU 288(CX), Y0 + VMOVDQU 320(CX), Y1 + VMOVDQU 352(CX), Y2 + VMOVDQU 384(CX), Y3 + VPUNPCKLQDQ Y8, Y7, Y4 + VPUNPCKHQDQ Y8, Y7, Y8 + VMOVDQA Y4, Y7 + VPUNPCKLQDQ Y10, Y9, Y4 + VPUNPCKHQDQ Y10, Y9, Y10 + VMOVDQA Y4, Y9 + VPUNPCKLQDQ Y12, Y11, Y4 + VPUNPCKHQDQ Y12, Y11, Y12 + VMOVDQA Y4, Y11 + VPUNPCKLQDQ Y14, Y13, Y4 + VPUNPCKHQDQ Y14, Y13, Y14 + VMOVDQA Y4, Y13 + VPMULLW Y9, Y0, Y4 + VPMULLW Y10, Y0, Y5 + VPMULLW Y13, Y2, Y6 + VPMULLW Y14, Y2, Y0 + VPMULHW Y9, Y1, Y9 + VPMULHW Y10, Y1, Y10 + VPMULHW Y13, Y3, Y13 + VPMULHW Y14, Y3, Y14 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPMULHW Y6, Y15, Y6 + VPMULHW Y0, Y15, Y0 + VPSUBW Y4, Y9, Y4 + VPSUBW Y5, Y10, Y5 + VPSUBW Y6, Y13, Y6 + VPSUBW Y0, Y14, Y0 + VPSUBW Y4, Y7, Y9 + VPSUBW Y5, Y8, Y10 + VPSUBW Y6, Y11, Y13 + VPSUBW Y0, Y12, Y14 + VPADDW Y4, Y7, Y7 + VPADDW Y5, Y8, Y8 + VPADDW Y6, Y11, Y11 + VPADDW Y0, Y12, Y12 + VMOVDQU 544(CX), Y0 + VMOVDQU 576(CX), Y1 + VMOVDQU 608(CX), Y2 + VMOVDQU 640(CX), Y3 + VMOVSLDUP Y9, Y4 + VPBLENDD $0xaa, Y4, Y7, Y4 + VPSRLQ $0x20, Y7, Y7 + VPBLENDD $0xaa, Y9, Y7, Y9 + VMOVDQA Y4, Y7 + VMOVSLDUP Y10, Y4 + VPBLENDD $0xaa, Y4, Y8, Y4 + VPSRLQ $0x20, Y8, Y8 + VPBLENDD $0xaa, Y10, Y8, Y10 + VMOVDQA Y4, Y8 + VMOVSLDUP Y13, Y4 + VPBLENDD $0xaa, Y4, Y11, Y4 + VPSRLQ $0x20, Y11, Y11 + VPBLENDD $0xaa, Y13, Y11, Y13 + VMOVDQA Y4, Y11 + VMOVSLDUP Y14, Y4 + VPBLENDD $0xaa, Y4, Y12, Y4 + VPSRLQ $0x20, Y12, Y12 + VPBLENDD $0xaa, Y14, Y12, Y14 + VMOVDQA Y4, Y12 + VPMULLW Y8, Y0, Y4 + VPMULLW Y10, Y0, Y5 + VPMULLW Y12, Y2, Y6 + VPMULLW Y14, Y2, Y0 + VPMULHW Y8, Y1, Y8 + VPMULHW Y10, Y1, Y10 + VPMULHW Y12, Y3, Y12 + VPMULHW Y14, Y3, Y14 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPMULHW Y6, Y15, Y6 + VPMULHW Y0, Y15, Y0 + VPSUBW Y4, Y8, Y4 + VPSUBW Y5, Y10, Y5 + VPSUBW Y6, Y12, Y6 + VPSUBW Y0, Y14, Y0 + VPSUBW Y4, Y7, Y8 + VPSUBW Y5, Y9, Y10 + VPSUBW Y6, Y11, Y12 + VPSUBW Y0, Y13, Y14 + VPADDW Y4, Y7, Y7 + VPADDW Y5, Y9, Y9 + VPADDW Y6, Y11, Y11 + VPADDW Y0, Y13, Y13 + VMOVDQU 800(CX), Y0 + VMOVDQU 832(CX), Y1 + VMOVDQU 864(CX), Y2 + VMOVDQU 896(CX), Y3 + VPSLLD $0x10, Y8, Y4 + VPBLENDW $0xaa, Y4, Y7, Y4 + VPSRLD $0x10, Y7, Y7 + VPBLENDW $0xaa, Y8, Y7, Y8 + VMOVDQA Y4, Y7 + VPSLLD $0x10, Y10, Y4 + VPBLENDW $0xaa, Y4, Y9, Y4 + VPSRLD $0x10, Y9, Y9 + VPBLENDW $0xaa, Y10, Y9, Y10 + VMOVDQA Y4, Y9 + VPSLLD $0x10, Y12, Y4 + VPBLENDW $0xaa, Y4, Y11, Y4 + VPSRLD $0x10, Y11, Y11 + VPBLENDW $0xaa, Y12, Y11, Y12 + VMOVDQA Y4, Y11 + VPSLLD $0x10, Y14, Y4 + VPBLENDW $0xaa, Y4, Y13, Y4 + VPSRLD $0x10, Y13, Y13 + VPBLENDW $0xaa, Y14, Y13, Y14 + VMOVDQA Y4, Y13 + VPMULLW Y9, Y0, Y4 + VPMULLW Y10, Y0, Y5 + VPMULLW Y13, Y2, Y6 + VPMULLW Y14, Y2, Y0 + VPMULHW Y9, Y1, Y9 + VPMULHW Y10, Y1, Y10 + VPMULHW Y13, Y3, Y13 + VPMULHW Y14, Y3, Y14 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPMULHW Y6, Y15, Y6 + VPMULHW Y0, Y15, Y0 + VPSUBW Y4, Y9, Y4 + VPSUBW Y5, Y10, Y5 + VPSUBW Y6, Y13, Y6 + VPSUBW Y0, Y14, Y0 + VPSUBW Y4, Y7, Y9 + VPSUBW Y5, Y8, Y10 + VPSUBW Y6, Y11, Y13 + VPSUBW Y0, Y12, Y14 + VPADDW Y4, Y7, Y7 + VPADDW Y5, Y8, Y8 + VPADDW Y6, Y11, Y11 + VPADDW Y0, Y12, Y12 + VMOVDQU Y7, (AX) + VMOVDQU Y8, 32(AX) + VMOVDQU Y9, 64(AX) + VMOVDQU Y10, 96(AX) + VMOVDQU Y11, 128(AX) + VMOVDQU Y12, 160(AX) + VMOVDQU Y13, 192(AX) + VMOVDQU Y14, 224(AX) + VPBROADCASTW 8(CX), Y0 + VPBROADCASTW 10(CX), Y1 + VMOVDQU 256(AX), Y7 + VMOVDQU 288(AX), Y8 + VMOVDQU 320(AX), Y9 + VMOVDQU 352(AX), Y10 + VMOVDQU 384(AX), Y11 + VMOVDQU 416(AX), Y12 + VMOVDQU 448(AX), Y13 + VMOVDQU 480(AX), Y14 + VPMULLW Y11, Y0, Y2 + VPMULLW Y12, Y0, Y3 + VPMULLW Y13, Y0, Y4 + VPMULLW Y14, Y0, Y5 + VPMULHW Y11, Y1, Y11 + VPMULHW Y12, Y1, Y12 + VPMULHW Y13, Y1, Y13 + VPMULHW Y14, Y1, Y14 + VPMULHW Y2, Y15, Y2 + VPMULHW Y3, Y15, Y3 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPSUBW Y2, Y11, Y2 + VPSUBW Y3, Y12, Y3 + VPSUBW Y4, Y13, Y4 + VPSUBW Y5, Y14, Y5 + VPSUBW Y2, Y7, Y11 + VPSUBW Y3, Y8, Y12 + VPSUBW Y4, Y9, Y13 + VPSUBW Y5, Y10, Y14 + VPADDW Y2, Y7, Y7 + VPADDW Y3, Y8, Y8 + VPADDW Y4, Y9, Y9 + VPADDW Y5, Y10, Y10 + VPBROADCASTW 20(CX), Y0 + VPBROADCASTW 22(CX), Y1 + VPBROADCASTW 24(CX), Y2 + VPBROADCASTW 26(CX), Y3 + VPMULLW Y9, Y0, Y4 + VPMULLW Y10, Y0, Y5 + VPMULLW Y13, Y2, Y6 + VPMULLW Y14, Y2, Y0 + VPMULHW Y9, Y1, Y9 + VPMULHW Y10, Y1, Y10 + VPMULHW Y13, Y3, Y13 + VPMULHW Y14, Y3, Y14 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPMULHW Y6, Y15, Y6 + VPMULHW Y0, Y15, Y0 + VPSUBW Y4, Y9, Y4 + VPSUBW Y5, Y10, Y5 + VPSUBW Y6, Y13, Y6 + VPSUBW Y0, Y14, Y0 + VPSUBW Y4, Y7, Y9 + VPSUBW Y5, Y8, Y10 + VPSUBW Y6, Y11, Y13 + VPSUBW Y0, Y12, Y14 + VPADDW Y4, Y7, Y7 + VPADDW Y5, Y8, Y8 + VPADDW Y6, Y11, Y11 + VPADDW Y0, Y12, Y12 + VMOVDQU 160(CX), Y0 + VMOVDQU 192(CX), Y1 + VMOVDQU 224(CX), Y2 + VMOVDQU 256(CX), Y3 + VPERM2I128 $0x20, Y9, Y7, Y4 + VPERM2I128 $0x31, Y9, Y7, Y9 + VMOVDQA Y4, Y7 + VPERM2I128 $0x20, Y10, Y8, Y4 + VPERM2I128 $0x31, Y10, Y8, Y10 + VMOVDQA Y4, Y8 + VPERM2I128 $0x20, Y13, Y11, Y4 + VPERM2I128 $0x31, Y13, Y11, Y13 + VMOVDQA Y4, Y11 + VPERM2I128 $0x20, Y14, Y12, Y4 + VPERM2I128 $0x31, Y14, Y12, Y14 + VMOVDQA Y4, Y12 + VPMULLW Y8, Y0, Y4 + VPMULLW Y10, Y0, Y5 + VPMULLW Y12, Y2, Y6 + VPMULLW Y14, Y2, Y0 + VPMULHW Y8, Y1, Y8 + VPMULHW Y10, Y1, Y10 + VPMULHW Y12, Y3, Y12 + VPMULHW Y14, Y3, Y14 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPMULHW Y6, Y15, Y6 + VPMULHW Y0, Y15, Y0 + VPSUBW Y4, Y8, Y4 + VPSUBW Y5, Y10, Y5 + VPSUBW Y6, Y12, Y6 + VPSUBW Y0, Y14, Y0 + VPSUBW Y4, Y7, Y8 + VPSUBW Y5, Y9, Y10 + VPSUBW Y6, Y11, Y12 + VPSUBW Y0, Y13, Y14 + VPADDW Y4, Y7, Y7 + VPADDW Y5, Y9, Y9 + VPADDW Y6, Y11, Y11 + VPADDW Y0, Y13, Y13 + VMOVDQU 416(CX), Y0 + VMOVDQU 448(CX), Y1 + VMOVDQU 480(CX), Y2 + VMOVDQU 512(CX), Y3 + VPUNPCKLQDQ Y8, Y7, Y4 + VPUNPCKHQDQ Y8, Y7, Y8 + VMOVDQA Y4, Y7 + VPUNPCKLQDQ Y10, Y9, Y4 + VPUNPCKHQDQ Y10, Y9, Y10 + VMOVDQA Y4, Y9 + VPUNPCKLQDQ Y12, Y11, Y4 + VPUNPCKHQDQ Y12, Y11, Y12 + VMOVDQA Y4, Y11 + VPUNPCKLQDQ Y14, Y13, Y4 + VPUNPCKHQDQ Y14, Y13, Y14 + VMOVDQA Y4, Y13 + VPMULLW Y9, Y0, Y4 + VPMULLW Y10, Y0, Y5 + VPMULLW Y13, Y2, Y6 + VPMULLW Y14, Y2, Y0 + VPMULHW Y9, Y1, Y9 + VPMULHW Y10, Y1, Y10 + VPMULHW Y13, Y3, Y13 + VPMULHW Y14, Y3, Y14 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPMULHW Y6, Y15, Y6 + VPMULHW Y0, Y15, Y0 + VPSUBW Y4, Y9, Y4 + VPSUBW Y5, Y10, Y5 + VPSUBW Y6, Y13, Y6 + VPSUBW Y0, Y14, Y0 + VPSUBW Y4, Y7, Y9 + VPSUBW Y5, Y8, Y10 + VPSUBW Y6, Y11, Y13 + VPSUBW Y0, Y12, Y14 + VPADDW Y4, Y7, Y7 + VPADDW Y5, Y8, Y8 + VPADDW Y6, Y11, Y11 + VPADDW Y0, Y12, Y12 + VMOVDQU 672(CX), Y0 + VMOVDQU 704(CX), Y1 + VMOVDQU 736(CX), Y2 + VMOVDQU 768(CX), Y3 + VMOVSLDUP Y9, Y4 + VPBLENDD $0xaa, Y4, Y7, Y4 + VPSRLQ $0x20, Y7, Y7 + VPBLENDD $0xaa, Y9, Y7, Y9 + VMOVDQA Y4, Y7 + VMOVSLDUP Y10, Y4 + VPBLENDD $0xaa, Y4, Y8, Y4 + VPSRLQ $0x20, Y8, Y8 + VPBLENDD $0xaa, Y10, Y8, Y10 + VMOVDQA Y4, Y8 + VMOVSLDUP Y13, Y4 + VPBLENDD $0xaa, Y4, Y11, Y4 + VPSRLQ $0x20, Y11, Y11 + VPBLENDD $0xaa, Y13, Y11, Y13 + VMOVDQA Y4, Y11 + VMOVSLDUP Y14, Y4 + VPBLENDD $0xaa, Y4, Y12, Y4 + VPSRLQ $0x20, Y12, Y12 + VPBLENDD $0xaa, Y14, Y12, Y14 + VMOVDQA Y4, Y12 + VPMULLW Y8, Y0, Y4 + VPMULLW Y10, Y0, Y5 + VPMULLW Y12, Y2, Y6 + VPMULLW Y14, Y2, Y0 + VPMULHW Y8, Y1, Y8 + VPMULHW Y10, Y1, Y10 + VPMULHW Y12, Y3, Y12 + VPMULHW Y14, Y3, Y14 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPMULHW Y6, Y15, Y6 + VPMULHW Y0, Y15, Y0 + VPSUBW Y4, Y8, Y4 + VPSUBW Y5, Y10, Y5 + VPSUBW Y6, Y12, Y6 + VPSUBW Y0, Y14, Y0 + VPSUBW Y4, Y7, Y8 + VPSUBW Y5, Y9, Y10 + VPSUBW Y6, Y11, Y12 + VPSUBW Y0, Y13, Y14 + VPADDW Y4, Y7, Y7 + VPADDW Y5, Y9, Y9 + VPADDW Y6, Y11, Y11 + VPADDW Y0, Y13, Y13 + VMOVDQU 928(CX), Y0 + VMOVDQU 960(CX), Y1 + VMOVDQU 992(CX), Y2 + VMOVDQU 1024(CX), Y3 + VPSLLD $0x10, Y8, Y4 + VPBLENDW $0xaa, Y4, Y7, Y4 + VPSRLD $0x10, Y7, Y7 + VPBLENDW $0xaa, Y8, Y7, Y8 + VMOVDQA Y4, Y7 + VPSLLD $0x10, Y10, Y4 + VPBLENDW $0xaa, Y4, Y9, Y4 + VPSRLD $0x10, Y9, Y9 + VPBLENDW $0xaa, Y10, Y9, Y10 + VMOVDQA Y4, Y9 + VPSLLD $0x10, Y12, Y4 + VPBLENDW $0xaa, Y4, Y11, Y4 + VPSRLD $0x10, Y11, Y11 + VPBLENDW $0xaa, Y12, Y11, Y12 + VMOVDQA Y4, Y11 + VPSLLD $0x10, Y14, Y4 + VPBLENDW $0xaa, Y4, Y13, Y4 + VPSRLD $0x10, Y13, Y13 + VPBLENDW $0xaa, Y14, Y13, Y14 + VMOVDQA Y4, Y13 + VPMULLW Y9, Y0, Y4 + VPMULLW Y10, Y0, Y5 + VPMULLW Y13, Y2, Y6 + VPMULLW Y14, Y2, Y0 + VPMULHW Y9, Y1, Y9 + VPMULHW Y10, Y1, Y10 + VPMULHW Y13, Y3, Y13 + VPMULHW Y14, Y3, Y14 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPMULHW Y6, Y15, Y6 + VPMULHW Y0, Y15, Y0 + VPSUBW Y4, Y9, Y4 + VPSUBW Y5, Y10, Y5 + VPSUBW Y6, Y13, Y6 + VPSUBW Y0, Y14, Y0 + VPSUBW Y4, Y7, Y9 + VPSUBW Y5, Y8, Y10 + VPSUBW Y6, Y11, Y13 + VPSUBW Y0, Y12, Y14 + VPADDW Y4, Y7, Y7 + VPADDW Y5, Y8, Y8 + VPADDW Y6, Y11, Y11 + VPADDW Y0, Y12, Y12 + VMOVDQU Y7, 256(AX) + VMOVDQU Y8, 288(AX) + VMOVDQU Y9, 320(AX) + VMOVDQU Y10, 352(AX) + VMOVDQU Y11, 384(AX) + VMOVDQU Y12, 416(AX) + VMOVDQU Y13, 448(AX) + VMOVDQU Y14, 480(AX) + RET + +// func invNttAVX2(p *[256]int16) +// Requires: AVX, AVX2 +TEXT ·invNttAVX2(SB), NOSPLIT, $0-8 + MOVQ p+0(FP), AX + LEAQ ·ZetasAVX2+0(SB), CX + MOVL $0x00000d01, DX + VMOVD DX, X0 + VPBROADCASTW X0, Y15 + VMOVDQU (AX), Y7 + VMOVDQU 32(AX), Y8 + VMOVDQU 64(AX), Y9 + VMOVDQU 96(AX), Y10 + VMOVDQU 128(AX), Y11 + VMOVDQU 160(AX), Y12 + VMOVDQU 192(AX), Y13 + VMOVDQU 224(AX), Y14 + VMOVDQU 1056(CX), Y0 + VMOVDQU 1088(CX), Y1 + VMOVDQU 1120(CX), Y2 + VMOVDQU 1152(CX), Y3 + VPSUBW Y7, Y9, Y4 + VPSUBW Y8, Y10, Y5 + VPSUBW Y11, Y13, Y6 + VPADDW Y7, Y9, Y7 + VPADDW Y8, Y10, Y8 + VPADDW Y11, Y13, Y11 + VPMULLW Y4, Y0, Y9 + VPMULLW Y5, Y0, Y10 + VPSUBW Y12, Y14, Y0 + VPMULLW Y6, Y2, Y13 + VPADDW Y12, Y14, Y12 + VPMULLW Y0, Y2, Y14 + VPMULHW Y4, Y1, Y4 + VPMULHW Y5, Y1, Y5 + VPMULHW Y6, Y3, Y6 + VPMULHW Y0, Y3, Y0 + VPMULHW Y9, Y15, Y9 + VPMULHW Y10, Y15, Y10 + VPMULHW Y13, Y15, Y13 + VPMULHW Y14, Y15, Y14 + VPSUBW Y9, Y4, Y9 + VPSUBW Y10, Y5, Y10 + VPSUBW Y13, Y6, Y13 + VPSUBW Y14, Y0, Y14 + VMOVDQU 1312(CX), Y0 + VMOVDQU 1344(CX), Y1 + VMOVDQU 1376(CX), Y2 + VMOVDQU 1408(CX), Y3 + VPSLLD $0x10, Y8, Y4 + VPBLENDW $0xaa, Y4, Y7, Y4 + VPSRLD $0x10, Y7, Y7 + VPBLENDW $0xaa, Y8, Y7, Y8 + VMOVDQA Y4, Y7 + VPSLLD $0x10, Y10, Y4 + VPBLENDW $0xaa, Y4, Y9, Y4 + VPSRLD $0x10, Y9, Y9 + VPBLENDW $0xaa, Y10, Y9, Y10 + VMOVDQA Y4, Y9 + VPSLLD $0x10, Y12, Y4 + VPBLENDW $0xaa, Y4, Y11, Y4 + VPSRLD $0x10, Y11, Y11 + VPBLENDW $0xaa, Y12, Y11, Y12 + VMOVDQA Y4, Y11 + VPSLLD $0x10, Y14, Y4 + VPBLENDW $0xaa, Y4, Y13, Y4 + VPSRLD $0x10, Y13, Y13 + VPBLENDW $0xaa, Y14, Y13, Y14 + VMOVDQA Y4, Y13 + VPSUBW Y7, Y8, Y4 + VPSUBW Y9, Y10, Y5 + VPSUBW Y11, Y12, Y6 + VPADDW Y7, Y8, Y7 + VPADDW Y9, Y10, Y9 + VPADDW Y11, Y12, Y11 + VPMULLW Y4, Y0, Y8 + VPMULLW Y5, Y0, Y10 + VPSUBW Y13, Y14, Y0 + VPMULLW Y6, Y2, Y12 + VPADDW Y13, Y14, Y13 + VPMULLW Y0, Y2, Y14 + VPMULHW Y4, Y1, Y4 + VPMULHW Y5, Y1, Y5 + VPMULHW Y6, Y3, Y6 + VPMULHW Y0, Y3, Y0 + VPMULHW Y8, Y15, Y8 + VPMULHW Y10, Y15, Y10 + VPMULHW Y12, Y15, Y12 + VPMULHW Y14, Y15, Y14 + VPSUBW Y8, Y4, Y8 + VPSUBW Y10, Y5, Y10 + VPSUBW Y12, Y6, Y12 + VPSUBW Y14, Y0, Y14 + VMOVDQU 1568(CX), Y0 + VMOVDQU 1600(CX), Y1 + VMOVDQU 1632(CX), Y2 + VMOVDQU 1664(CX), Y3 + VMOVSLDUP Y9, Y4 + VPBLENDD $0xaa, Y4, Y7, Y4 + VPSRLQ $0x20, Y7, Y7 + VPBLENDD $0xaa, Y9, Y7, Y9 + VMOVDQA Y4, Y7 + VMOVSLDUP Y10, Y4 + VPBLENDD $0xaa, Y4, Y8, Y4 + VPSRLQ $0x20, Y8, Y8 + VPBLENDD $0xaa, Y10, Y8, Y10 + VMOVDQA Y4, Y8 + VMOVSLDUP Y13, Y4 + VPBLENDD $0xaa, Y4, Y11, Y4 + VPSRLQ $0x20, Y11, Y11 + VPBLENDD $0xaa, Y13, Y11, Y13 + VMOVDQA Y4, Y11 + VMOVSLDUP Y14, Y4 + VPBLENDD $0xaa, Y4, Y12, Y4 + VPSRLQ $0x20, Y12, Y12 + VPBLENDD $0xaa, Y14, Y12, Y14 + VMOVDQA Y4, Y12 + VPSUBW Y7, Y9, Y4 + VPSUBW Y8, Y10, Y5 + VPSUBW Y11, Y13, Y6 + VPADDW Y7, Y9, Y7 + VPADDW Y8, Y10, Y8 + VPADDW Y11, Y13, Y11 + VPMULLW Y4, Y0, Y9 + VPMULLW Y5, Y0, Y10 + VPSUBW Y12, Y14, Y0 + VPMULLW Y6, Y2, Y13 + VPADDW Y12, Y14, Y12 + VPMULLW Y0, Y2, Y14 + VPMULHW Y4, Y1, Y4 + VPMULHW Y5, Y1, Y5 + VPMULHW Y6, Y3, Y6 + VPMULHW Y0, Y3, Y0 + VPMULHW Y9, Y15, Y9 + VPMULHW Y10, Y15, Y10 + VPMULHW Y13, Y15, Y13 + VPMULHW Y14, Y15, Y14 + VPSUBW Y9, Y4, Y9 + VPSUBW Y10, Y5, Y10 + VPSUBW Y13, Y6, Y13 + VPSUBW Y14, Y0, Y14 + MOVL $0x00004ebf, DX + VMOVD DX, X0 + VPBROADCASTW X0, Y4 + VPMULHW Y4, Y7, Y5 + VPSRAW $0x0a, Y5, Y5 + VPMULLW Y15, Y5, Y5 + VPSUBW Y5, Y7, Y7 + VPMULHW Y4, Y11, Y5 + VPSRAW $0x0a, Y5, Y5 + VPMULLW Y15, Y5, Y5 + VPSUBW Y5, Y11, Y11 + VMOVDQU 1824(CX), Y0 + VMOVDQU 1856(CX), Y1 + VMOVDQU 1888(CX), Y2 + VMOVDQU 1920(CX), Y3 + VPUNPCKLQDQ Y8, Y7, Y4 + VPUNPCKHQDQ Y8, Y7, Y8 + VMOVDQA Y4, Y7 + VPUNPCKLQDQ Y10, Y9, Y4 + VPUNPCKHQDQ Y10, Y9, Y10 + VMOVDQA Y4, Y9 + VPUNPCKLQDQ Y12, Y11, Y4 + VPUNPCKHQDQ Y12, Y11, Y12 + VMOVDQA Y4, Y11 + VPUNPCKLQDQ Y14, Y13, Y4 + VPUNPCKHQDQ Y14, Y13, Y14 + VMOVDQA Y4, Y13 + VPSUBW Y7, Y8, Y4 + VPSUBW Y9, Y10, Y5 + VPSUBW Y11, Y12, Y6 + VPADDW Y7, Y8, Y7 + VPADDW Y9, Y10, Y9 + VPADDW Y11, Y12, Y11 + VPMULLW Y4, Y0, Y8 + VPMULLW Y5, Y0, Y10 + VPSUBW Y13, Y14, Y0 + VPMULLW Y6, Y2, Y12 + VPADDW Y13, Y14, Y13 + VPMULLW Y0, Y2, Y14 + VPMULHW Y4, Y1, Y4 + VPMULHW Y5, Y1, Y5 + VPMULHW Y6, Y3, Y6 + VPMULHW Y0, Y3, Y0 + VPMULHW Y8, Y15, Y8 + VPMULHW Y10, Y15, Y10 + VPMULHW Y12, Y15, Y12 + VPMULHW Y14, Y15, Y14 + VPSUBW Y8, Y4, Y8 + VPSUBW Y10, Y5, Y10 + VPSUBW Y12, Y6, Y12 + VPSUBW Y14, Y0, Y14 + VPBROADCASTW 2080(CX), Y0 + VPBROADCASTW 2082(CX), Y1 + VPBROADCASTW 2084(CX), Y2 + VPBROADCASTW 2086(CX), Y3 + VPERM2I128 $0x20, Y9, Y7, Y4 + VPERM2I128 $0x31, Y9, Y7, Y9 + VMOVDQA Y4, Y7 + VPERM2I128 $0x20, Y10, Y8, Y4 + VPERM2I128 $0x31, Y10, Y8, Y10 + VMOVDQA Y4, Y8 + VPERM2I128 $0x20, Y13, Y11, Y4 + VPERM2I128 $0x31, Y13, Y11, Y13 + VMOVDQA Y4, Y11 + VPERM2I128 $0x20, Y14, Y12, Y4 + VPERM2I128 $0x31, Y14, Y12, Y14 + VMOVDQA Y4, Y12 + VPSUBW Y7, Y9, Y4 + VPSUBW Y8, Y10, Y5 + VPSUBW Y11, Y13, Y6 + VPADDW Y7, Y9, Y7 + VPADDW Y8, Y10, Y8 + VPADDW Y11, Y13, Y11 + VPMULLW Y4, Y0, Y9 + VPMULLW Y5, Y0, Y10 + VPSUBW Y12, Y14, Y0 + VPMULLW Y6, Y2, Y13 + VPADDW Y12, Y14, Y12 + VPMULLW Y0, Y2, Y14 + VPMULHW Y4, Y1, Y4 + VPMULHW Y5, Y1, Y5 + VPMULHW Y6, Y3, Y6 + VPMULHW Y0, Y3, Y0 + VPMULHW Y9, Y15, Y9 + VPMULHW Y10, Y15, Y10 + VPMULHW Y13, Y15, Y13 + VPMULHW Y14, Y15, Y14 + VPSUBW Y9, Y4, Y9 + VPSUBW Y10, Y5, Y10 + VPSUBW Y13, Y6, Y13 + VPSUBW Y14, Y0, Y14 + MOVL $0x00004ebf, DX + VMOVD DX, X0 + VPBROADCASTW X0, Y4 + VPMULHW Y4, Y7, Y5 + VPSRAW $0x0a, Y5, Y5 + VPMULLW Y15, Y5, Y5 + VPSUBW Y5, Y7, Y7 + VPMULHW Y4, Y11, Y5 + VPSRAW $0x0a, Y5, Y5 + VPMULLW Y15, Y5, Y5 + VPSUBW Y5, Y11, Y11 + VPBROADCASTW 2096(CX), Y0 + VPBROADCASTW 2098(CX), Y1 + VPSUBW Y7, Y11, Y4 + VPSUBW Y8, Y12, Y5 + VPSUBW Y9, Y13, Y6 + VPADDW Y7, Y11, Y7 + VPADDW Y8, Y12, Y8 + VPADDW Y9, Y13, Y9 + VPMULLW Y4, Y0, Y11 + VPMULLW Y5, Y0, Y12 + VPSUBW Y10, Y14, Y2 + VPMULLW Y6, Y0, Y13 + VPADDW Y10, Y14, Y10 + VPMULLW Y2, Y0, Y14 + VPMULHW Y4, Y1, Y4 + VPMULHW Y5, Y1, Y5 + VPMULHW Y6, Y1, Y6 + VPMULHW Y2, Y1, Y2 + VPMULHW Y11, Y15, Y11 + VPMULHW Y12, Y15, Y12 + VPMULHW Y13, Y15, Y13 + VPMULHW Y14, Y15, Y14 + VPSUBW Y11, Y4, Y11 + VPSUBW Y12, Y5, Y12 + VPSUBW Y13, Y6, Y13 + VPSUBW Y14, Y2, Y14 + VMOVDQU Y7, (AX) + VMOVDQU Y8, 32(AX) + VMOVDQU Y9, 64(AX) + VMOVDQU Y10, 96(AX) + VMOVDQU Y11, 128(AX) + VMOVDQU Y12, 160(AX) + VMOVDQU Y13, 192(AX) + VMOVDQU Y14, 224(AX) + VMOVDQU 256(AX), Y7 + VMOVDQU 288(AX), Y8 + VMOVDQU 320(AX), Y9 + VMOVDQU 352(AX), Y10 + VMOVDQU 384(AX), Y11 + VMOVDQU 416(AX), Y12 + VMOVDQU 448(AX), Y13 + VMOVDQU 480(AX), Y14 + VMOVDQU 1184(CX), Y0 + VMOVDQU 1216(CX), Y1 + VMOVDQU 1248(CX), Y2 + VMOVDQU 1280(CX), Y3 + VPSUBW Y7, Y9, Y4 + VPSUBW Y8, Y10, Y5 + VPSUBW Y11, Y13, Y6 + VPADDW Y7, Y9, Y7 + VPADDW Y8, Y10, Y8 + VPADDW Y11, Y13, Y11 + VPMULLW Y4, Y0, Y9 + VPMULLW Y5, Y0, Y10 + VPSUBW Y12, Y14, Y0 + VPMULLW Y6, Y2, Y13 + VPADDW Y12, Y14, Y12 + VPMULLW Y0, Y2, Y14 + VPMULHW Y4, Y1, Y4 + VPMULHW Y5, Y1, Y5 + VPMULHW Y6, Y3, Y6 + VPMULHW Y0, Y3, Y0 + VPMULHW Y9, Y15, Y9 + VPMULHW Y10, Y15, Y10 + VPMULHW Y13, Y15, Y13 + VPMULHW Y14, Y15, Y14 + VPSUBW Y9, Y4, Y9 + VPSUBW Y10, Y5, Y10 + VPSUBW Y13, Y6, Y13 + VPSUBW Y14, Y0, Y14 + VMOVDQU 1440(CX), Y0 + VMOVDQU 1472(CX), Y1 + VMOVDQU 1504(CX), Y2 + VMOVDQU 1536(CX), Y3 + VPSLLD $0x10, Y8, Y4 + VPBLENDW $0xaa, Y4, Y7, Y4 + VPSRLD $0x10, Y7, Y7 + VPBLENDW $0xaa, Y8, Y7, Y8 + VMOVDQA Y4, Y7 + VPSLLD $0x10, Y10, Y4 + VPBLENDW $0xaa, Y4, Y9, Y4 + VPSRLD $0x10, Y9, Y9 + VPBLENDW $0xaa, Y10, Y9, Y10 + VMOVDQA Y4, Y9 + VPSLLD $0x10, Y12, Y4 + VPBLENDW $0xaa, Y4, Y11, Y4 + VPSRLD $0x10, Y11, Y11 + VPBLENDW $0xaa, Y12, Y11, Y12 + VMOVDQA Y4, Y11 + VPSLLD $0x10, Y14, Y4 + VPBLENDW $0xaa, Y4, Y13, Y4 + VPSRLD $0x10, Y13, Y13 + VPBLENDW $0xaa, Y14, Y13, Y14 + VMOVDQA Y4, Y13 + VPSUBW Y7, Y8, Y4 + VPSUBW Y9, Y10, Y5 + VPSUBW Y11, Y12, Y6 + VPADDW Y7, Y8, Y7 + VPADDW Y9, Y10, Y9 + VPADDW Y11, Y12, Y11 + VPMULLW Y4, Y0, Y8 + VPMULLW Y5, Y0, Y10 + VPSUBW Y13, Y14, Y0 + VPMULLW Y6, Y2, Y12 + VPADDW Y13, Y14, Y13 + VPMULLW Y0, Y2, Y14 + VPMULHW Y4, Y1, Y4 + VPMULHW Y5, Y1, Y5 + VPMULHW Y6, Y3, Y6 + VPMULHW Y0, Y3, Y0 + VPMULHW Y8, Y15, Y8 + VPMULHW Y10, Y15, Y10 + VPMULHW Y12, Y15, Y12 + VPMULHW Y14, Y15, Y14 + VPSUBW Y8, Y4, Y8 + VPSUBW Y10, Y5, Y10 + VPSUBW Y12, Y6, Y12 + VPSUBW Y14, Y0, Y14 + VMOVDQU 1696(CX), Y0 + VMOVDQU 1728(CX), Y1 + VMOVDQU 1760(CX), Y2 + VMOVDQU 1792(CX), Y3 + VMOVSLDUP Y9, Y4 + VPBLENDD $0xaa, Y4, Y7, Y4 + VPSRLQ $0x20, Y7, Y7 + VPBLENDD $0xaa, Y9, Y7, Y9 + VMOVDQA Y4, Y7 + VMOVSLDUP Y10, Y4 + VPBLENDD $0xaa, Y4, Y8, Y4 + VPSRLQ $0x20, Y8, Y8 + VPBLENDD $0xaa, Y10, Y8, Y10 + VMOVDQA Y4, Y8 + VMOVSLDUP Y13, Y4 + VPBLENDD $0xaa, Y4, Y11, Y4 + VPSRLQ $0x20, Y11, Y11 + VPBLENDD $0xaa, Y13, Y11, Y13 + VMOVDQA Y4, Y11 + VMOVSLDUP Y14, Y4 + VPBLENDD $0xaa, Y4, Y12, Y4 + VPSRLQ $0x20, Y12, Y12 + VPBLENDD $0xaa, Y14, Y12, Y14 + VMOVDQA Y4, Y12 + VPSUBW Y7, Y9, Y4 + VPSUBW Y8, Y10, Y5 + VPSUBW Y11, Y13, Y6 + VPADDW Y7, Y9, Y7 + VPADDW Y8, Y10, Y8 + VPADDW Y11, Y13, Y11 + VPMULLW Y4, Y0, Y9 + VPMULLW Y5, Y0, Y10 + VPSUBW Y12, Y14, Y0 + VPMULLW Y6, Y2, Y13 + VPADDW Y12, Y14, Y12 + VPMULLW Y0, Y2, Y14 + VPMULHW Y4, Y1, Y4 + VPMULHW Y5, Y1, Y5 + VPMULHW Y6, Y3, Y6 + VPMULHW Y0, Y3, Y0 + VPMULHW Y9, Y15, Y9 + VPMULHW Y10, Y15, Y10 + VPMULHW Y13, Y15, Y13 + VPMULHW Y14, Y15, Y14 + VPSUBW Y9, Y4, Y9 + VPSUBW Y10, Y5, Y10 + VPSUBW Y13, Y6, Y13 + VPSUBW Y14, Y0, Y14 + MOVL $0x00004ebf, DX + VMOVD DX, X0 + VPBROADCASTW X0, Y4 + VPMULHW Y4, Y7, Y5 + VPSRAW $0x0a, Y5, Y5 + VPMULLW Y15, Y5, Y5 + VPSUBW Y5, Y7, Y7 + VPMULHW Y4, Y11, Y5 + VPSRAW $0x0a, Y5, Y5 + VPMULLW Y15, Y5, Y5 + VPSUBW Y5, Y11, Y11 + VMOVDQU 1952(CX), Y0 + VMOVDQU 1984(CX), Y1 + VMOVDQU 2016(CX), Y2 + VMOVDQU 2048(CX), Y3 + VPUNPCKLQDQ Y8, Y7, Y4 + VPUNPCKHQDQ Y8, Y7, Y8 + VMOVDQA Y4, Y7 + VPUNPCKLQDQ Y10, Y9, Y4 + VPUNPCKHQDQ Y10, Y9, Y10 + VMOVDQA Y4, Y9 + VPUNPCKLQDQ Y12, Y11, Y4 + VPUNPCKHQDQ Y12, Y11, Y12 + VMOVDQA Y4, Y11 + VPUNPCKLQDQ Y14, Y13, Y4 + VPUNPCKHQDQ Y14, Y13, Y14 + VMOVDQA Y4, Y13 + VPSUBW Y7, Y8, Y4 + VPSUBW Y9, Y10, Y5 + VPSUBW Y11, Y12, Y6 + VPADDW Y7, Y8, Y7 + VPADDW Y9, Y10, Y9 + VPADDW Y11, Y12, Y11 + VPMULLW Y4, Y0, Y8 + VPMULLW Y5, Y0, Y10 + VPSUBW Y13, Y14, Y0 + VPMULLW Y6, Y2, Y12 + VPADDW Y13, Y14, Y13 + VPMULLW Y0, Y2, Y14 + VPMULHW Y4, Y1, Y4 + VPMULHW Y5, Y1, Y5 + VPMULHW Y6, Y3, Y6 + VPMULHW Y0, Y3, Y0 + VPMULHW Y8, Y15, Y8 + VPMULHW Y10, Y15, Y10 + VPMULHW Y12, Y15, Y12 + VPMULHW Y14, Y15, Y14 + VPSUBW Y8, Y4, Y8 + VPSUBW Y10, Y5, Y10 + VPSUBW Y12, Y6, Y12 + VPSUBW Y14, Y0, Y14 + VPBROADCASTW 2088(CX), Y0 + VPBROADCASTW 2090(CX), Y1 + VPBROADCASTW 2092(CX), Y2 + VPBROADCASTW 2094(CX), Y3 + VPERM2I128 $0x20, Y9, Y7, Y4 + VPERM2I128 $0x31, Y9, Y7, Y9 + VMOVDQA Y4, Y7 + VPERM2I128 $0x20, Y10, Y8, Y4 + VPERM2I128 $0x31, Y10, Y8, Y10 + VMOVDQA Y4, Y8 + VPERM2I128 $0x20, Y13, Y11, Y4 + VPERM2I128 $0x31, Y13, Y11, Y13 + VMOVDQA Y4, Y11 + VPERM2I128 $0x20, Y14, Y12, Y4 + VPERM2I128 $0x31, Y14, Y12, Y14 + VMOVDQA Y4, Y12 + VPSUBW Y7, Y9, Y4 + VPSUBW Y8, Y10, Y5 + VPSUBW Y11, Y13, Y6 + VPADDW Y7, Y9, Y7 + VPADDW Y8, Y10, Y8 + VPADDW Y11, Y13, Y11 + VPMULLW Y4, Y0, Y9 + VPMULLW Y5, Y0, Y10 + VPSUBW Y12, Y14, Y0 + VPMULLW Y6, Y2, Y13 + VPADDW Y12, Y14, Y12 + VPMULLW Y0, Y2, Y14 + VPMULHW Y4, Y1, Y4 + VPMULHW Y5, Y1, Y5 + VPMULHW Y6, Y3, Y6 + VPMULHW Y0, Y3, Y0 + VPMULHW Y9, Y15, Y9 + VPMULHW Y10, Y15, Y10 + VPMULHW Y13, Y15, Y13 + VPMULHW Y14, Y15, Y14 + VPSUBW Y9, Y4, Y9 + VPSUBW Y10, Y5, Y10 + VPSUBW Y13, Y6, Y13 + VPSUBW Y14, Y0, Y14 + MOVL $0x00004ebf, DX + VMOVD DX, X0 + VPBROADCASTW X0, Y4 + VPMULHW Y4, Y7, Y5 + VPSRAW $0x0a, Y5, Y5 + VPMULLW Y15, Y5, Y5 + VPSUBW Y5, Y7, Y7 + VPMULHW Y4, Y11, Y5 + VPSRAW $0x0a, Y5, Y5 + VPMULLW Y15, Y5, Y5 + VPSUBW Y5, Y11, Y11 + VPBROADCASTW 2100(CX), Y0 + VPBROADCASTW 2102(CX), Y1 + VPSUBW Y7, Y11, Y4 + VPSUBW Y8, Y12, Y5 + VPSUBW Y9, Y13, Y6 + VPADDW Y7, Y11, Y7 + VPADDW Y8, Y12, Y8 + VPADDW Y9, Y13, Y9 + VPMULLW Y4, Y0, Y11 + VPMULLW Y5, Y0, Y12 + VPSUBW Y10, Y14, Y2 + VPMULLW Y6, Y0, Y13 + VPADDW Y10, Y14, Y10 + VPMULLW Y2, Y0, Y14 + VPMULHW Y4, Y1, Y4 + VPMULHW Y5, Y1, Y5 + VPMULHW Y6, Y1, Y6 + VPMULHW Y2, Y1, Y2 + VPMULHW Y11, Y15, Y11 + VPMULHW Y12, Y15, Y12 + VPMULHW Y13, Y15, Y13 + VPMULHW Y14, Y15, Y14 + VPSUBW Y11, Y4, Y11 + VPSUBW Y12, Y5, Y12 + VPSUBW Y13, Y6, Y13 + VPSUBW Y14, Y2, Y14 + VMOVDQU Y7, 256(AX) + VMOVDQU Y8, 288(AX) + VMOVDQU Y9, 320(AX) + VMOVDQU Y10, 352(AX) + VMOVDQU Y11, 384(AX) + VMOVDQU Y12, 416(AX) + VMOVDQU Y13, 448(AX) + VMOVDQU Y14, 480(AX) + VPBROADCASTW 2104(CX), Y0 + VPBROADCASTW 2106(CX), Y1 + VMOVDQU (AX), Y7 + VMOVDQU 32(AX), Y8 + VMOVDQU 64(AX), Y9 + VMOVDQU 96(AX), Y10 + VMOVDQU 256(AX), Y11 + VMOVDQU 288(AX), Y12 + VMOVDQU 320(AX), Y13 + VMOVDQU 352(AX), Y14 + VPSUBW Y7, Y11, Y2 + VPSUBW Y8, Y12, Y3 + VPSUBW Y9, Y13, Y4 + VPADDW Y7, Y11, Y7 + VPADDW Y8, Y12, Y8 + VPADDW Y9, Y13, Y9 + VPMULLW Y2, Y0, Y11 + VPMULLW Y3, Y0, Y12 + VPSUBW Y10, Y14, Y5 + VPMULLW Y4, Y0, Y13 + VPADDW Y10, Y14, Y10 + VPMULLW Y5, Y0, Y14 + VPMULHW Y2, Y1, Y2 + VPMULHW Y3, Y1, Y3 + VPMULHW Y4, Y1, Y4 + VPMULHW Y5, Y1, Y5 + VPMULHW Y11, Y15, Y11 + VPMULHW Y12, Y15, Y12 + VPMULHW Y13, Y15, Y13 + VPMULHW Y14, Y15, Y14 + VPSUBW Y11, Y2, Y11 + VPSUBW Y12, Y3, Y12 + VPSUBW Y13, Y4, Y13 + VPSUBW Y14, Y5, Y14 + MOVL $0xffffd8a1, DX + VMOVD DX, X0 + VPBROADCASTW X0, Y0 + MOVL $0x000005a1, DX + VMOVD DX, X1 + VPBROADCASTW X1, Y1 + VPMULLW Y7, Y0, Y2 + VPMULLW Y8, Y0, Y3 + VPMULLW Y9, Y0, Y4 + VPMULLW Y10, Y0, Y5 + VPMULHW Y7, Y1, Y7 + VPMULHW Y8, Y1, Y8 + VPMULHW Y9, Y1, Y9 + VPMULHW Y10, Y1, Y10 + VPMULHW Y2, Y15, Y2 + VPMULHW Y3, Y15, Y3 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPSUBW Y2, Y7, Y7 + VPSUBW Y3, Y8, Y8 + VPSUBW Y4, Y9, Y9 + VPSUBW Y5, Y10, Y10 + VPMULLW Y11, Y0, Y2 + VPMULLW Y12, Y0, Y3 + VPMULLW Y13, Y0, Y4 + VPMULLW Y14, Y0, Y5 + VPMULHW Y11, Y1, Y11 + VPMULHW Y12, Y1, Y12 + VPMULHW Y13, Y1, Y13 + VPMULHW Y14, Y1, Y14 + VPMULHW Y2, Y15, Y2 + VPMULHW Y3, Y15, Y3 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPSUBW Y2, Y11, Y11 + VPSUBW Y3, Y12, Y12 + VPSUBW Y4, Y13, Y13 + VPSUBW Y5, Y14, Y14 + VMOVDQU Y7, (AX) + VMOVDQU Y8, 32(AX) + VMOVDQU Y9, 64(AX) + VMOVDQU Y10, 96(AX) + VMOVDQU Y11, 256(AX) + VMOVDQU Y12, 288(AX) + VMOVDQU Y13, 320(AX) + VMOVDQU Y14, 352(AX) + VPBROADCASTW 2104(CX), Y0 + VPBROADCASTW 2106(CX), Y1 + VMOVDQU 128(AX), Y7 + VMOVDQU 160(AX), Y8 + VMOVDQU 192(AX), Y9 + VMOVDQU 224(AX), Y10 + VMOVDQU 384(AX), Y11 + VMOVDQU 416(AX), Y12 + VMOVDQU 448(AX), Y13 + VMOVDQU 480(AX), Y14 + VPSUBW Y7, Y11, Y2 + VPSUBW Y8, Y12, Y3 + VPSUBW Y9, Y13, Y4 + VPADDW Y7, Y11, Y7 + VPADDW Y8, Y12, Y8 + VPADDW Y9, Y13, Y9 + VPMULLW Y2, Y0, Y11 + VPMULLW Y3, Y0, Y12 + VPSUBW Y10, Y14, Y5 + VPMULLW Y4, Y0, Y13 + VPADDW Y10, Y14, Y10 + VPMULLW Y5, Y0, Y14 + VPMULHW Y2, Y1, Y2 + VPMULHW Y3, Y1, Y3 + VPMULHW Y4, Y1, Y4 + VPMULHW Y5, Y1, Y5 + VPMULHW Y11, Y15, Y11 + VPMULHW Y12, Y15, Y12 + VPMULHW Y13, Y15, Y13 + VPMULHW Y14, Y15, Y14 + VPSUBW Y11, Y2, Y11 + VPSUBW Y12, Y3, Y12 + VPSUBW Y13, Y4, Y13 + VPSUBW Y14, Y5, Y14 + MOVL $0xffffd8a1, CX + VMOVD CX, X0 + VPBROADCASTW X0, Y0 + MOVL $0x000005a1, CX + VMOVD CX, X1 + VPBROADCASTW X1, Y1 + VPMULLW Y7, Y0, Y2 + VPMULLW Y8, Y0, Y3 + VPMULLW Y9, Y0, Y4 + VPMULLW Y10, Y0, Y5 + VPMULHW Y7, Y1, Y7 + VPMULHW Y8, Y1, Y8 + VPMULHW Y9, Y1, Y9 + VPMULHW Y10, Y1, Y10 + VPMULHW Y2, Y15, Y2 + VPMULHW Y3, Y15, Y3 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPSUBW Y2, Y7, Y7 + VPSUBW Y3, Y8, Y8 + VPSUBW Y4, Y9, Y9 + VPSUBW Y5, Y10, Y10 + VPMULLW Y11, Y0, Y2 + VPMULLW Y12, Y0, Y3 + VPMULLW Y13, Y0, Y4 + VPMULLW Y14, Y0, Y5 + VPMULHW Y11, Y1, Y11 + VPMULHW Y12, Y1, Y12 + VPMULHW Y13, Y1, Y13 + VPMULHW Y14, Y1, Y14 + VPMULHW Y2, Y15, Y2 + VPMULHW Y3, Y15, Y3 + VPMULHW Y4, Y15, Y4 + VPMULHW Y5, Y15, Y5 + VPSUBW Y2, Y11, Y11 + VPSUBW Y3, Y12, Y12 + VPSUBW Y4, Y13, Y13 + VPSUBW Y5, Y14, Y14 + VMOVDQU Y7, 128(AX) + VMOVDQU Y8, 160(AX) + VMOVDQU Y9, 192(AX) + VMOVDQU Y10, 224(AX) + VMOVDQU Y11, 384(AX) + VMOVDQU Y12, 416(AX) + VMOVDQU Y13, 448(AX) + VMOVDQU Y14, 480(AX) + RET + +// func mulHatAVX2(p *[256]int16, a *[256]int16, b *[256]int16) +// Requires: AVX, AVX2 +TEXT ·mulHatAVX2(SB), NOSPLIT, $8-24 + MOVQ p+0(FP), AX + MOVQ a+8(FP), CX + MOVQ b+16(FP), DX + LEAQ ·ZetasAVX2+0(SB), BX + MOVL $0xfffff301, SI + VMOVD SI, X0 + VPBROADCASTW X0, Y14 + MOVL $0x00000d01, SI + VMOVD SI, X0 + VPBROADCASTW X0, Y15 + VMOVDQU (CX), Y0 + VMOVDQU 32(CX), Y1 + VMOVDQU 64(CX), Y2 + VMOVDQU 96(CX), Y3 + VMOVDQU (DX), Y4 + VMOVDQU 32(DX), Y5 + VMOVDQU 64(DX), Y6 + VMOVDQU 96(DX), Y7 + VPMULLW Y1, Y5, Y8 + VPMULLW Y0, Y4, Y9 + VPMULLW Y0, Y5, Y10 + VPMULLW Y1, Y4, Y11 + VPMULLW Y8, Y14, Y8 + VPMULLW Y9, Y14, Y9 + VPMULLW Y10, Y14, Y10 + VPMULLW Y11, Y14, Y11 + VPMULHW Y1, Y5, Y12 + VPMULHW Y0, Y4, Y13 + VPMULHW Y0, Y5, Y0 + VPMULHW Y1, Y4, Y1 + VMOVDQA Y12, Y4 + VMOVDQA Y13, Y5 + VPMULHW Y8, Y15, Y8 + VPMULHW Y9, Y15, Y9 + VPMULHW Y10, Y15, Y10 + VPMULHW Y11, Y15, Y11 + VPSUBW Y8, Y4, Y4 + VPSUBW Y9, Y5, Y5 + VPSUBW Y10, Y0, Y0 + VPSUBW Y11, Y1, Y1 + VMOVDQU 800(BX), Y12 + VMOVDQU 832(BX), Y13 + VPMULLW Y4, Y12, Y8 + VPMULHW Y4, Y13, Y4 + VPMULHW Y8, Y15, Y8 + VPSUBW Y8, Y4, Y4 + VPADDW Y4, Y5, Y4 + VPADDW Y0, Y1, Y5 + VPMULLW Y3, Y7, Y8 + VPMULLW Y2, Y6, Y9 + VPMULLW Y2, Y7, Y10 + VPMULLW Y3, Y6, Y11 + VPMULLW Y8, Y14, Y8 + VPMULLW Y9, Y14, Y9 + VPMULLW Y10, Y14, Y10 + VPMULLW Y11, Y14, Y11 + VPMULHW Y3, Y7, Y12 + VPMULHW Y2, Y6, Y13 + VPMULHW Y2, Y7, Y2 + VPMULHW Y3, Y6, Y3 + VMOVDQA Y12, Y6 + VMOVDQA Y13, Y7 + VPMULHW Y8, Y15, Y8 + VPMULHW Y9, Y15, Y9 + VPMULHW Y10, Y15, Y10 + VPMULHW Y11, Y15, Y11 + VPSUBW Y8, Y6, Y6 + VPSUBW Y9, Y7, Y7 + VPSUBW Y10, Y2, Y2 + VPSUBW Y11, Y3, Y3 + VMOVDQU 800(BX), Y12 + VMOVDQU 832(BX), Y13 + VPMULLW Y6, Y12, Y8 + VPMULHW Y6, Y13, Y6 + VPMULHW Y8, Y15, Y8 + VPSUBW Y8, Y6, Y6 + VPSUBW Y6, Y7, Y6 + VPADDW Y2, Y3, Y7 + VMOVDQU Y4, (AX) + VMOVDQU Y5, 32(AX) + VMOVDQU Y6, 64(AX) + VMOVDQU Y7, 96(AX) + VMOVDQU 128(CX), Y0 + VMOVDQU 160(CX), Y1 + VMOVDQU 192(CX), Y2 + VMOVDQU 224(CX), Y3 + VMOVDQU 128(DX), Y4 + VMOVDQU 160(DX), Y5 + VMOVDQU 192(DX), Y6 + VMOVDQU 224(DX), Y7 + VPMULLW Y1, Y5, Y8 + VPMULLW Y0, Y4, Y9 + VPMULLW Y0, Y5, Y10 + VPMULLW Y1, Y4, Y11 + VPMULLW Y8, Y14, Y8 + VPMULLW Y9, Y14, Y9 + VPMULLW Y10, Y14, Y10 + VPMULLW Y11, Y14, Y11 + VPMULHW Y1, Y5, Y12 + VPMULHW Y0, Y4, Y13 + VPMULHW Y0, Y5, Y0 + VPMULHW Y1, Y4, Y1 + VMOVDQA Y12, Y4 + VMOVDQA Y13, Y5 + VPMULHW Y8, Y15, Y8 + VPMULHW Y9, Y15, Y9 + VPMULHW Y10, Y15, Y10 + VPMULHW Y11, Y15, Y11 + VPSUBW Y8, Y4, Y4 + VPSUBW Y9, Y5, Y5 + VPSUBW Y10, Y0, Y0 + VPSUBW Y11, Y1, Y1 + VMOVDQU 864(BX), Y12 + VMOVDQU 896(BX), Y13 + VPMULLW Y4, Y12, Y8 + VPMULHW Y4, Y13, Y4 + VPMULHW Y8, Y15, Y8 + VPSUBW Y8, Y4, Y4 + VPADDW Y4, Y5, Y4 + VPADDW Y0, Y1, Y5 + VPMULLW Y3, Y7, Y8 + VPMULLW Y2, Y6, Y9 + VPMULLW Y2, Y7, Y10 + VPMULLW Y3, Y6, Y11 + VPMULLW Y8, Y14, Y8 + VPMULLW Y9, Y14, Y9 + VPMULLW Y10, Y14, Y10 + VPMULLW Y11, Y14, Y11 + VPMULHW Y3, Y7, Y12 + VPMULHW Y2, Y6, Y13 + VPMULHW Y2, Y7, Y2 + VPMULHW Y3, Y6, Y3 + VMOVDQA Y12, Y6 + VMOVDQA Y13, Y7 + VPMULHW Y8, Y15, Y8 + VPMULHW Y9, Y15, Y9 + VPMULHW Y10, Y15, Y10 + VPMULHW Y11, Y15, Y11 + VPSUBW Y8, Y6, Y6 + VPSUBW Y9, Y7, Y7 + VPSUBW Y10, Y2, Y2 + VPSUBW Y11, Y3, Y3 + VMOVDQU 864(BX), Y12 + VMOVDQU 896(BX), Y13 + VPMULLW Y6, Y12, Y8 + VPMULHW Y6, Y13, Y6 + VPMULHW Y8, Y15, Y8 + VPSUBW Y8, Y6, Y6 + VPSUBW Y6, Y7, Y6 + VPADDW Y2, Y3, Y7 + VMOVDQU Y4, 128(AX) + VMOVDQU Y5, 160(AX) + VMOVDQU Y6, 192(AX) + VMOVDQU Y7, 224(AX) + VMOVDQU 256(CX), Y0 + VMOVDQU 288(CX), Y1 + VMOVDQU 320(CX), Y2 + VMOVDQU 352(CX), Y3 + VMOVDQU 256(DX), Y4 + VMOVDQU 288(DX), Y5 + VMOVDQU 320(DX), Y6 + VMOVDQU 352(DX), Y7 + VPMULLW Y1, Y5, Y8 + VPMULLW Y0, Y4, Y9 + VPMULLW Y0, Y5, Y10 + VPMULLW Y1, Y4, Y11 + VPMULLW Y8, Y14, Y8 + VPMULLW Y9, Y14, Y9 + VPMULLW Y10, Y14, Y10 + VPMULLW Y11, Y14, Y11 + VPMULHW Y1, Y5, Y12 + VPMULHW Y0, Y4, Y13 + VPMULHW Y0, Y5, Y0 + VPMULHW Y1, Y4, Y1 + VMOVDQA Y12, Y4 + VMOVDQA Y13, Y5 + VPMULHW Y8, Y15, Y8 + VPMULHW Y9, Y15, Y9 + VPMULHW Y10, Y15, Y10 + VPMULHW Y11, Y15, Y11 + VPSUBW Y8, Y4, Y4 + VPSUBW Y9, Y5, Y5 + VPSUBW Y10, Y0, Y0 + VPSUBW Y11, Y1, Y1 + VMOVDQU 928(BX), Y12 + VMOVDQU 960(BX), Y13 + VPMULLW Y4, Y12, Y8 + VPMULHW Y4, Y13, Y4 + VPMULHW Y8, Y15, Y8 + VPSUBW Y8, Y4, Y4 + VPADDW Y4, Y5, Y4 + VPADDW Y0, Y1, Y5 + VPMULLW Y3, Y7, Y8 + VPMULLW Y2, Y6, Y9 + VPMULLW Y2, Y7, Y10 + VPMULLW Y3, Y6, Y11 + VPMULLW Y8, Y14, Y8 + VPMULLW Y9, Y14, Y9 + VPMULLW Y10, Y14, Y10 + VPMULLW Y11, Y14, Y11 + VPMULHW Y3, Y7, Y12 + VPMULHW Y2, Y6, Y13 + VPMULHW Y2, Y7, Y2 + VPMULHW Y3, Y6, Y3 + VMOVDQA Y12, Y6 + VMOVDQA Y13, Y7 + VPMULHW Y8, Y15, Y8 + VPMULHW Y9, Y15, Y9 + VPMULHW Y10, Y15, Y10 + VPMULHW Y11, Y15, Y11 + VPSUBW Y8, Y6, Y6 + VPSUBW Y9, Y7, Y7 + VPSUBW Y10, Y2, Y2 + VPSUBW Y11, Y3, Y3 + VMOVDQU 928(BX), Y12 + VMOVDQU 960(BX), Y13 + VPMULLW Y6, Y12, Y8 + VPMULHW Y6, Y13, Y6 + VPMULHW Y8, Y15, Y8 + VPSUBW Y8, Y6, Y6 + VPSUBW Y6, Y7, Y6 + VPADDW Y2, Y3, Y7 + VMOVDQU Y4, 256(AX) + VMOVDQU Y5, 288(AX) + VMOVDQU Y6, 320(AX) + VMOVDQU Y7, 352(AX) + VMOVDQU 384(CX), Y0 + VMOVDQU 416(CX), Y1 + VMOVDQU 448(CX), Y2 + VMOVDQU 480(CX), Y3 + VMOVDQU 384(DX), Y4 + VMOVDQU 416(DX), Y5 + VMOVDQU 448(DX), Y6 + VMOVDQU 480(DX), Y7 + VPMULLW Y1, Y5, Y8 + VPMULLW Y0, Y4, Y9 + VPMULLW Y0, Y5, Y10 + VPMULLW Y1, Y4, Y11 + VPMULLW Y8, Y14, Y8 + VPMULLW Y9, Y14, Y9 + VPMULLW Y10, Y14, Y10 + VPMULLW Y11, Y14, Y11 + VPMULHW Y1, Y5, Y12 + VPMULHW Y0, Y4, Y13 + VPMULHW Y0, Y5, Y0 + VPMULHW Y1, Y4, Y1 + VMOVDQA Y12, Y4 + VMOVDQA Y13, Y5 + VPMULHW Y8, Y15, Y8 + VPMULHW Y9, Y15, Y9 + VPMULHW Y10, Y15, Y10 + VPMULHW Y11, Y15, Y11 + VPSUBW Y8, Y4, Y4 + VPSUBW Y9, Y5, Y5 + VPSUBW Y10, Y0, Y0 + VPSUBW Y11, Y1, Y1 + VMOVDQU 992(BX), Y12 + VMOVDQU 1024(BX), Y13 + VPMULLW Y4, Y12, Y8 + VPMULHW Y4, Y13, Y4 + VPMULHW Y8, Y15, Y8 + VPSUBW Y8, Y4, Y4 + VPADDW Y4, Y5, Y4 + VPADDW Y0, Y1, Y5 + VPMULLW Y3, Y7, Y8 + VPMULLW Y2, Y6, Y9 + VPMULLW Y2, Y7, Y10 + VPMULLW Y3, Y6, Y11 + VPMULLW Y8, Y14, Y8 + VPMULLW Y9, Y14, Y9 + VPMULLW Y10, Y14, Y10 + VPMULLW Y11, Y14, Y11 + VPMULHW Y3, Y7, Y12 + VPMULHW Y2, Y6, Y13 + VPMULHW Y2, Y7, Y2 + VPMULHW Y3, Y6, Y3 + VMOVDQA Y12, Y6 + VMOVDQA Y13, Y7 + VPMULHW Y8, Y15, Y8 + VPMULHW Y9, Y15, Y9 + VPMULHW Y10, Y15, Y10 + VPMULHW Y11, Y15, Y11 + VPSUBW Y8, Y6, Y6 + VPSUBW Y9, Y7, Y7 + VPSUBW Y10, Y2, Y2 + VPSUBW Y11, Y3, Y3 + VMOVDQU 992(BX), Y12 + VMOVDQU 1024(BX), Y13 + VPMULLW Y6, Y12, Y8 + VPMULHW Y6, Y13, Y6 + VPMULHW Y8, Y15, Y8 + VPSUBW Y8, Y6, Y6 + VPSUBW Y6, Y7, Y6 + VPADDW Y2, Y3, Y7 + VMOVDQU Y4, 384(AX) + VMOVDQU Y5, 416(AX) + VMOVDQU Y6, 448(AX) + VMOVDQU Y7, 480(AX) + RET + +// func detangleAVX2(p *[256]int16) +// Requires: AVX, AVX2 +TEXT ·detangleAVX2(SB), NOSPLIT, $0-8 + MOVQ p+0(FP), AX + VMOVDQU (AX), Y0 + VMOVDQU 32(AX), Y1 + VMOVDQU 64(AX), Y2 + VMOVDQU 96(AX), Y3 + VMOVDQU 128(AX), Y4 + VMOVDQU 160(AX), Y5 + VMOVDQU 192(AX), Y6 + VMOVDQU 224(AX), Y7 + VPSLLD $0x10, Y1, Y8 + VPBLENDW $0xaa, Y8, Y0, Y8 + VPSRLD $0x10, Y0, Y0 + VPBLENDW $0xaa, Y1, Y0, Y1 + VMOVDQA Y8, Y0 + VPSLLD $0x10, Y3, Y8 + VPBLENDW $0xaa, Y8, Y2, Y8 + VPSRLD $0x10, Y2, Y2 + VPBLENDW $0xaa, Y3, Y2, Y3 + VMOVDQA Y8, Y2 + VPSLLD $0x10, Y5, Y8 + VPBLENDW $0xaa, Y8, Y4, Y8 + VPSRLD $0x10, Y4, Y4 + VPBLENDW $0xaa, Y5, Y4, Y5 + VMOVDQA Y8, Y4 + VPSLLD $0x10, Y7, Y8 + VPBLENDW $0xaa, Y8, Y6, Y8 + VPSRLD $0x10, Y6, Y6 + VPBLENDW $0xaa, Y7, Y6, Y7 + VMOVDQA Y8, Y6 + VMOVSLDUP Y2, Y8 + VPBLENDD $0xaa, Y8, Y0, Y8 + VPSRLQ $0x20, Y0, Y0 + VPBLENDD $0xaa, Y2, Y0, Y2 + VMOVDQA Y8, Y0 + VMOVSLDUP Y3, Y8 + VPBLENDD $0xaa, Y8, Y1, Y8 + VPSRLQ $0x20, Y1, Y1 + VPBLENDD $0xaa, Y3, Y1, Y3 + VMOVDQA Y8, Y1 + VMOVSLDUP Y6, Y8 + VPBLENDD $0xaa, Y8, Y4, Y8 + VPSRLQ $0x20, Y4, Y4 + VPBLENDD $0xaa, Y6, Y4, Y6 + VMOVDQA Y8, Y4 + VMOVSLDUP Y7, Y8 + VPBLENDD $0xaa, Y8, Y5, Y8 + VPSRLQ $0x20, Y5, Y5 + VPBLENDD $0xaa, Y7, Y5, Y7 + VMOVDQA Y8, Y5 + VPUNPCKLQDQ Y1, Y0, Y8 + VPUNPCKHQDQ Y1, Y0, Y1 + VMOVDQA Y8, Y0 + VPUNPCKLQDQ Y3, Y2, Y8 + VPUNPCKHQDQ Y3, Y2, Y3 + VMOVDQA Y8, Y2 + VPUNPCKLQDQ Y5, Y4, Y8 + VPUNPCKHQDQ Y5, Y4, Y5 + VMOVDQA Y8, Y4 + VPUNPCKLQDQ Y7, Y6, Y8 + VPUNPCKHQDQ Y7, Y6, Y7 + VMOVDQA Y8, Y6 + VPERM2I128 $0x20, Y2, Y0, Y8 + VPERM2I128 $0x31, Y2, Y0, Y2 + VMOVDQA Y8, Y0 + VPERM2I128 $0x20, Y3, Y1, Y8 + VPERM2I128 $0x31, Y3, Y1, Y3 + VMOVDQA Y8, Y1 + VPERM2I128 $0x20, Y6, Y4, Y8 + VPERM2I128 $0x31, Y6, Y4, Y6 + VMOVDQA Y8, Y4 + VPERM2I128 $0x20, Y7, Y5, Y8 + VPERM2I128 $0x31, Y7, Y5, Y7 + VMOVDQA Y8, Y5 + VMOVDQU Y0, (AX) + VMOVDQU Y1, 32(AX) + VMOVDQU Y2, 64(AX) + VMOVDQU Y3, 96(AX) + VMOVDQU Y4, 128(AX) + VMOVDQU Y5, 160(AX) + VMOVDQU Y6, 192(AX) + VMOVDQU Y7, 224(AX) + VMOVDQU 256(AX), Y0 + VMOVDQU 288(AX), Y1 + VMOVDQU 320(AX), Y2 + VMOVDQU 352(AX), Y3 + VMOVDQU 384(AX), Y4 + VMOVDQU 416(AX), Y5 + VMOVDQU 448(AX), Y6 + VMOVDQU 480(AX), Y7 + VPSLLD $0x10, Y1, Y8 + VPBLENDW $0xaa, Y8, Y0, Y8 + VPSRLD $0x10, Y0, Y0 + VPBLENDW $0xaa, Y1, Y0, Y1 + VMOVDQA Y8, Y0 + VPSLLD $0x10, Y3, Y8 + VPBLENDW $0xaa, Y8, Y2, Y8 + VPSRLD $0x10, Y2, Y2 + VPBLENDW $0xaa, Y3, Y2, Y3 + VMOVDQA Y8, Y2 + VPSLLD $0x10, Y5, Y8 + VPBLENDW $0xaa, Y8, Y4, Y8 + VPSRLD $0x10, Y4, Y4 + VPBLENDW $0xaa, Y5, Y4, Y5 + VMOVDQA Y8, Y4 + VPSLLD $0x10, Y7, Y8 + VPBLENDW $0xaa, Y8, Y6, Y8 + VPSRLD $0x10, Y6, Y6 + VPBLENDW $0xaa, Y7, Y6, Y7 + VMOVDQA Y8, Y6 + VMOVSLDUP Y2, Y8 + VPBLENDD $0xaa, Y8, Y0, Y8 + VPSRLQ $0x20, Y0, Y0 + VPBLENDD $0xaa, Y2, Y0, Y2 + VMOVDQA Y8, Y0 + VMOVSLDUP Y3, Y8 + VPBLENDD $0xaa, Y8, Y1, Y8 + VPSRLQ $0x20, Y1, Y1 + VPBLENDD $0xaa, Y3, Y1, Y3 + VMOVDQA Y8, Y1 + VMOVSLDUP Y6, Y8 + VPBLENDD $0xaa, Y8, Y4, Y8 + VPSRLQ $0x20, Y4, Y4 + VPBLENDD $0xaa, Y6, Y4, Y6 + VMOVDQA Y8, Y4 + VMOVSLDUP Y7, Y8 + VPBLENDD $0xaa, Y8, Y5, Y8 + VPSRLQ $0x20, Y5, Y5 + VPBLENDD $0xaa, Y7, Y5, Y7 + VMOVDQA Y8, Y5 + VPUNPCKLQDQ Y1, Y0, Y8 + VPUNPCKHQDQ Y1, Y0, Y1 + VMOVDQA Y8, Y0 + VPUNPCKLQDQ Y3, Y2, Y8 + VPUNPCKHQDQ Y3, Y2, Y3 + VMOVDQA Y8, Y2 + VPUNPCKLQDQ Y5, Y4, Y8 + VPUNPCKHQDQ Y5, Y4, Y5 + VMOVDQA Y8, Y4 + VPUNPCKLQDQ Y7, Y6, Y8 + VPUNPCKHQDQ Y7, Y6, Y7 + VMOVDQA Y8, Y6 + VPERM2I128 $0x20, Y2, Y0, Y8 + VPERM2I128 $0x31, Y2, Y0, Y2 + VMOVDQA Y8, Y0 + VPERM2I128 $0x20, Y3, Y1, Y8 + VPERM2I128 $0x31, Y3, Y1, Y3 + VMOVDQA Y8, Y1 + VPERM2I128 $0x20, Y6, Y4, Y8 + VPERM2I128 $0x31, Y6, Y4, Y6 + VMOVDQA Y8, Y4 + VPERM2I128 $0x20, Y7, Y5, Y8 + VPERM2I128 $0x31, Y7, Y5, Y7 + VMOVDQA Y8, Y5 + VMOVDQU Y0, 256(AX) + VMOVDQU Y1, 288(AX) + VMOVDQU Y2, 320(AX) + VMOVDQU Y3, 352(AX) + VMOVDQU Y4, 384(AX) + VMOVDQU Y5, 416(AX) + VMOVDQU Y6, 448(AX) + VMOVDQU Y7, 480(AX) + RET + +// func tangleAVX2(p *[256]int16) +// Requires: AVX, AVX2 +TEXT ·tangleAVX2(SB), NOSPLIT, $0-8 + MOVQ p+0(FP), AX + VMOVDQU (AX), Y0 + VMOVDQU 32(AX), Y1 + VMOVDQU 64(AX), Y2 + VMOVDQU 96(AX), Y3 + VMOVDQU 128(AX), Y4 + VMOVDQU 160(AX), Y5 + VMOVDQU 192(AX), Y6 + VMOVDQU 224(AX), Y7 + VPERM2I128 $0x20, Y2, Y0, Y8 + VPERM2I128 $0x31, Y2, Y0, Y2 + VMOVDQA Y8, Y0 + VPERM2I128 $0x20, Y3, Y1, Y8 + VPERM2I128 $0x31, Y3, Y1, Y3 + VMOVDQA Y8, Y1 + VPERM2I128 $0x20, Y6, Y4, Y8 + VPERM2I128 $0x31, Y6, Y4, Y6 + VMOVDQA Y8, Y4 + VPERM2I128 $0x20, Y7, Y5, Y8 + VPERM2I128 $0x31, Y7, Y5, Y7 + VMOVDQA Y8, Y5 + VPUNPCKLQDQ Y1, Y0, Y8 + VPUNPCKHQDQ Y1, Y0, Y1 + VMOVDQA Y8, Y0 + VPUNPCKLQDQ Y3, Y2, Y8 + VPUNPCKHQDQ Y3, Y2, Y3 + VMOVDQA Y8, Y2 + VPUNPCKLQDQ Y5, Y4, Y8 + VPUNPCKHQDQ Y5, Y4, Y5 + VMOVDQA Y8, Y4 + VPUNPCKLQDQ Y7, Y6, Y8 + VPUNPCKHQDQ Y7, Y6, Y7 + VMOVDQA Y8, Y6 + VMOVSLDUP Y2, Y8 + VPBLENDD $0xaa, Y8, Y0, Y8 + VPSRLQ $0x20, Y0, Y0 + VPBLENDD $0xaa, Y2, Y0, Y2 + VMOVDQA Y8, Y0 + VMOVSLDUP Y3, Y8 + VPBLENDD $0xaa, Y8, Y1, Y8 + VPSRLQ $0x20, Y1, Y1 + VPBLENDD $0xaa, Y3, Y1, Y3 + VMOVDQA Y8, Y1 + VMOVSLDUP Y6, Y8 + VPBLENDD $0xaa, Y8, Y4, Y8 + VPSRLQ $0x20, Y4, Y4 + VPBLENDD $0xaa, Y6, Y4, Y6 + VMOVDQA Y8, Y4 + VMOVSLDUP Y7, Y8 + VPBLENDD $0xaa, Y8, Y5, Y8 + VPSRLQ $0x20, Y5, Y5 + VPBLENDD $0xaa, Y7, Y5, Y7 + VMOVDQA Y8, Y5 + VPSLLD $0x10, Y1, Y8 + VPBLENDW $0xaa, Y8, Y0, Y8 + VPSRLD $0x10, Y0, Y0 + VPBLENDW $0xaa, Y1, Y0, Y1 + VMOVDQA Y8, Y0 + VPSLLD $0x10, Y3, Y8 + VPBLENDW $0xaa, Y8, Y2, Y8 + VPSRLD $0x10, Y2, Y2 + VPBLENDW $0xaa, Y3, Y2, Y3 + VMOVDQA Y8, Y2 + VPSLLD $0x10, Y5, Y8 + VPBLENDW $0xaa, Y8, Y4, Y8 + VPSRLD $0x10, Y4, Y4 + VPBLENDW $0xaa, Y5, Y4, Y5 + VMOVDQA Y8, Y4 + VPSLLD $0x10, Y7, Y8 + VPBLENDW $0xaa, Y8, Y6, Y8 + VPSRLD $0x10, Y6, Y6 + VPBLENDW $0xaa, Y7, Y6, Y7 + VMOVDQA Y8, Y6 + VMOVDQU Y0, (AX) + VMOVDQU Y1, 32(AX) + VMOVDQU Y2, 64(AX) + VMOVDQU Y3, 96(AX) + VMOVDQU Y4, 128(AX) + VMOVDQU Y5, 160(AX) + VMOVDQU Y6, 192(AX) + VMOVDQU Y7, 224(AX) + VMOVDQU 256(AX), Y0 + VMOVDQU 288(AX), Y1 + VMOVDQU 320(AX), Y2 + VMOVDQU 352(AX), Y3 + VMOVDQU 384(AX), Y4 + VMOVDQU 416(AX), Y5 + VMOVDQU 448(AX), Y6 + VMOVDQU 480(AX), Y7 + VPERM2I128 $0x20, Y2, Y0, Y8 + VPERM2I128 $0x31, Y2, Y0, Y2 + VMOVDQA Y8, Y0 + VPERM2I128 $0x20, Y3, Y1, Y8 + VPERM2I128 $0x31, Y3, Y1, Y3 + VMOVDQA Y8, Y1 + VPERM2I128 $0x20, Y6, Y4, Y8 + VPERM2I128 $0x31, Y6, Y4, Y6 + VMOVDQA Y8, Y4 + VPERM2I128 $0x20, Y7, Y5, Y8 + VPERM2I128 $0x31, Y7, Y5, Y7 + VMOVDQA Y8, Y5 + VPUNPCKLQDQ Y1, Y0, Y8 + VPUNPCKHQDQ Y1, Y0, Y1 + VMOVDQA Y8, Y0 + VPUNPCKLQDQ Y3, Y2, Y8 + VPUNPCKHQDQ Y3, Y2, Y3 + VMOVDQA Y8, Y2 + VPUNPCKLQDQ Y5, Y4, Y8 + VPUNPCKHQDQ Y5, Y4, Y5 + VMOVDQA Y8, Y4 + VPUNPCKLQDQ Y7, Y6, Y8 + VPUNPCKHQDQ Y7, Y6, Y7 + VMOVDQA Y8, Y6 + VMOVSLDUP Y2, Y8 + VPBLENDD $0xaa, Y8, Y0, Y8 + VPSRLQ $0x20, Y0, Y0 + VPBLENDD $0xaa, Y2, Y0, Y2 + VMOVDQA Y8, Y0 + VMOVSLDUP Y3, Y8 + VPBLENDD $0xaa, Y8, Y1, Y8 + VPSRLQ $0x20, Y1, Y1 + VPBLENDD $0xaa, Y3, Y1, Y3 + VMOVDQA Y8, Y1 + VMOVSLDUP Y6, Y8 + VPBLENDD $0xaa, Y8, Y4, Y8 + VPSRLQ $0x20, Y4, Y4 + VPBLENDD $0xaa, Y6, Y4, Y6 + VMOVDQA Y8, Y4 + VMOVSLDUP Y7, Y8 + VPBLENDD $0xaa, Y8, Y5, Y8 + VPSRLQ $0x20, Y5, Y5 + VPBLENDD $0xaa, Y7, Y5, Y7 + VMOVDQA Y8, Y5 + VPSLLD $0x10, Y1, Y8 + VPBLENDW $0xaa, Y8, Y0, Y8 + VPSRLD $0x10, Y0, Y0 + VPBLENDW $0xaa, Y1, Y0, Y1 + VMOVDQA Y8, Y0 + VPSLLD $0x10, Y3, Y8 + VPBLENDW $0xaa, Y8, Y2, Y8 + VPSRLD $0x10, Y2, Y2 + VPBLENDW $0xaa, Y3, Y2, Y3 + VMOVDQA Y8, Y2 + VPSLLD $0x10, Y5, Y8 + VPBLENDW $0xaa, Y8, Y4, Y8 + VPSRLD $0x10, Y4, Y4 + VPBLENDW $0xaa, Y5, Y4, Y5 + VMOVDQA Y8, Y4 + VPSLLD $0x10, Y7, Y8 + VPBLENDW $0xaa, Y8, Y6, Y8 + VPSRLD $0x10, Y6, Y6 + VPBLENDW $0xaa, Y7, Y6, Y7 + VMOVDQA Y8, Y6 + VMOVDQU Y0, 256(AX) + VMOVDQU Y1, 288(AX) + VMOVDQU Y2, 320(AX) + VMOVDQU Y3, 352(AX) + VMOVDQU Y4, 384(AX) + VMOVDQU Y5, 416(AX) + VMOVDQU Y6, 448(AX) + VMOVDQU Y7, 480(AX) + RET + +// func barrettReduceAVX2(p *[256]int16) +// Requires: AVX, AVX2 +TEXT ·barrettReduceAVX2(SB), NOSPLIT, $0-8 + MOVQ p+0(FP), AX + MOVL $0x00000d01, CX + VMOVD CX, X0 + VPBROADCASTW X0, Y9 + MOVL $0x00004ebf, CX + VMOVD CX, X0 + VPBROADCASTW X0, Y8 + VMOVDQU (AX), Y0 + VMOVDQU 32(AX), Y1 + VMOVDQU 64(AX), Y2 + VMOVDQU 96(AX), Y3 + VPMULHW Y8, Y0, Y4 + VPMULHW Y8, Y1, Y5 + VPMULHW Y8, Y2, Y6 + VPMULHW Y8, Y3, Y7 + VPSRAW $0x0a, Y4, Y4 + VPSRAW $0x0a, Y5, Y5 + VPSRAW $0x0a, Y6, Y6 + VPSRAW $0x0a, Y7, Y7 + VPMULLW Y9, Y4, Y4 + VPMULLW Y9, Y5, Y5 + VPMULLW Y9, Y6, Y6 + VPMULLW Y9, Y7, Y7 + VPSUBW Y4, Y0, Y0 + VPSUBW Y5, Y1, Y1 + VPSUBW Y6, Y2, Y2 + VPSUBW Y7, Y3, Y3 + VMOVDQU Y0, (AX) + VMOVDQU Y1, 32(AX) + VMOVDQU Y2, 64(AX) + VMOVDQU Y3, 96(AX) + VMOVDQU 128(AX), Y0 + VMOVDQU 160(AX), Y1 + VMOVDQU 192(AX), Y2 + VMOVDQU 224(AX), Y3 + VPMULHW Y8, Y0, Y4 + VPMULHW Y8, Y1, Y5 + VPMULHW Y8, Y2, Y6 + VPMULHW Y8, Y3, Y7 + VPSRAW $0x0a, Y4, Y4 + VPSRAW $0x0a, Y5, Y5 + VPSRAW $0x0a, Y6, Y6 + VPSRAW $0x0a, Y7, Y7 + VPMULLW Y9, Y4, Y4 + VPMULLW Y9, Y5, Y5 + VPMULLW Y9, Y6, Y6 + VPMULLW Y9, Y7, Y7 + VPSUBW Y4, Y0, Y0 + VPSUBW Y5, Y1, Y1 + VPSUBW Y6, Y2, Y2 + VPSUBW Y7, Y3, Y3 + VMOVDQU Y0, 128(AX) + VMOVDQU Y1, 160(AX) + VMOVDQU Y2, 192(AX) + VMOVDQU Y3, 224(AX) + VMOVDQU 256(AX), Y0 + VMOVDQU 288(AX), Y1 + VMOVDQU 320(AX), Y2 + VMOVDQU 352(AX), Y3 + VPMULHW Y8, Y0, Y4 + VPMULHW Y8, Y1, Y5 + VPMULHW Y8, Y2, Y6 + VPMULHW Y8, Y3, Y7 + VPSRAW $0x0a, Y4, Y4 + VPSRAW $0x0a, Y5, Y5 + VPSRAW $0x0a, Y6, Y6 + VPSRAW $0x0a, Y7, Y7 + VPMULLW Y9, Y4, Y4 + VPMULLW Y9, Y5, Y5 + VPMULLW Y9, Y6, Y6 + VPMULLW Y9, Y7, Y7 + VPSUBW Y4, Y0, Y0 + VPSUBW Y5, Y1, Y1 + VPSUBW Y6, Y2, Y2 + VPSUBW Y7, Y3, Y3 + VMOVDQU Y0, 256(AX) + VMOVDQU Y1, 288(AX) + VMOVDQU Y2, 320(AX) + VMOVDQU Y3, 352(AX) + VMOVDQU 384(AX), Y0 + VMOVDQU 416(AX), Y1 + VMOVDQU 448(AX), Y2 + VMOVDQU 480(AX), Y3 + VPMULHW Y8, Y0, Y4 + VPMULHW Y8, Y1, Y5 + VPMULHW Y8, Y2, Y6 + VPMULHW Y8, Y3, Y7 + VPSRAW $0x0a, Y4, Y4 + VPSRAW $0x0a, Y5, Y5 + VPSRAW $0x0a, Y6, Y6 + VPSRAW $0x0a, Y7, Y7 + VPMULLW Y9, Y4, Y4 + VPMULLW Y9, Y5, Y5 + VPMULLW Y9, Y6, Y6 + VPMULLW Y9, Y7, Y7 + VPSUBW Y4, Y0, Y0 + VPSUBW Y5, Y1, Y1 + VPSUBW Y6, Y2, Y2 + VPSUBW Y7, Y3, Y3 + VMOVDQU Y0, 384(AX) + VMOVDQU Y1, 416(AX) + VMOVDQU Y2, 448(AX) + VMOVDQU Y3, 480(AX) + RET + +// func normalizeAVX2(p *[256]int16) +// Requires: AVX, AVX2 +TEXT ·normalizeAVX2(SB), NOSPLIT, $0-8 + MOVQ p+0(FP), AX + MOVL $0x00000d01, CX + VMOVD CX, X0 + VPBROADCASTW X0, Y9 + MOVL $0x00004ebf, CX + VMOVD CX, X0 + VPBROADCASTW X0, Y8 + VMOVDQU (AX), Y0 + VMOVDQU 32(AX), Y1 + VMOVDQU 64(AX), Y2 + VMOVDQU 96(AX), Y3 + VPMULHW Y8, Y0, Y4 + VPMULHW Y8, Y1, Y5 + VPMULHW Y8, Y2, Y6 + VPMULHW Y8, Y3, Y7 + VPSRAW $0x0a, Y4, Y4 + VPSRAW $0x0a, Y5, Y5 + VPSRAW $0x0a, Y6, Y6 + VPSRAW $0x0a, Y7, Y7 + VPMULLW Y9, Y4, Y4 + VPMULLW Y9, Y5, Y5 + VPMULLW Y9, Y6, Y6 + VPMULLW Y9, Y7, Y7 + VPSUBW Y4, Y0, Y0 + VPSUBW Y5, Y1, Y1 + VPSUBW Y6, Y2, Y2 + VPSUBW Y7, Y3, Y3 + VPSUBW Y9, Y0, Y0 + VPSUBW Y9, Y1, Y1 + VPSUBW Y9, Y2, Y2 + VPSUBW Y9, Y3, Y3 + VPSRAW $0x0f, Y0, Y4 + VPSRAW $0x0f, Y1, Y5 + VPSRAW $0x0f, Y2, Y6 + VPSRAW $0x0f, Y3, Y7 + VPAND Y4, Y9, Y4 + VPAND Y5, Y9, Y5 + VPAND Y6, Y9, Y6 + VPAND Y7, Y9, Y7 + VPADDW Y0, Y4, Y0 + VPADDW Y1, Y5, Y1 + VPADDW Y2, Y6, Y2 + VPADDW Y3, Y7, Y3 + VMOVDQU Y0, (AX) + VMOVDQU Y1, 32(AX) + VMOVDQU Y2, 64(AX) + VMOVDQU Y3, 96(AX) + VMOVDQU 128(AX), Y0 + VMOVDQU 160(AX), Y1 + VMOVDQU 192(AX), Y2 + VMOVDQU 224(AX), Y3 + VPMULHW Y8, Y0, Y4 + VPMULHW Y8, Y1, Y5 + VPMULHW Y8, Y2, Y6 + VPMULHW Y8, Y3, Y7 + VPSRAW $0x0a, Y4, Y4 + VPSRAW $0x0a, Y5, Y5 + VPSRAW $0x0a, Y6, Y6 + VPSRAW $0x0a, Y7, Y7 + VPMULLW Y9, Y4, Y4 + VPMULLW Y9, Y5, Y5 + VPMULLW Y9, Y6, Y6 + VPMULLW Y9, Y7, Y7 + VPSUBW Y4, Y0, Y0 + VPSUBW Y5, Y1, Y1 + VPSUBW Y6, Y2, Y2 + VPSUBW Y7, Y3, Y3 + VPSUBW Y9, Y0, Y0 + VPSUBW Y9, Y1, Y1 + VPSUBW Y9, Y2, Y2 + VPSUBW Y9, Y3, Y3 + VPSRAW $0x0f, Y0, Y4 + VPSRAW $0x0f, Y1, Y5 + VPSRAW $0x0f, Y2, Y6 + VPSRAW $0x0f, Y3, Y7 + VPAND Y4, Y9, Y4 + VPAND Y5, Y9, Y5 + VPAND Y6, Y9, Y6 + VPAND Y7, Y9, Y7 + VPADDW Y0, Y4, Y0 + VPADDW Y1, Y5, Y1 + VPADDW Y2, Y6, Y2 + VPADDW Y3, Y7, Y3 + VMOVDQU Y0, 128(AX) + VMOVDQU Y1, 160(AX) + VMOVDQU Y2, 192(AX) + VMOVDQU Y3, 224(AX) + VMOVDQU 256(AX), Y0 + VMOVDQU 288(AX), Y1 + VMOVDQU 320(AX), Y2 + VMOVDQU 352(AX), Y3 + VPMULHW Y8, Y0, Y4 + VPMULHW Y8, Y1, Y5 + VPMULHW Y8, Y2, Y6 + VPMULHW Y8, Y3, Y7 + VPSRAW $0x0a, Y4, Y4 + VPSRAW $0x0a, Y5, Y5 + VPSRAW $0x0a, Y6, Y6 + VPSRAW $0x0a, Y7, Y7 + VPMULLW Y9, Y4, Y4 + VPMULLW Y9, Y5, Y5 + VPMULLW Y9, Y6, Y6 + VPMULLW Y9, Y7, Y7 + VPSUBW Y4, Y0, Y0 + VPSUBW Y5, Y1, Y1 + VPSUBW Y6, Y2, Y2 + VPSUBW Y7, Y3, Y3 + VPSUBW Y9, Y0, Y0 + VPSUBW Y9, Y1, Y1 + VPSUBW Y9, Y2, Y2 + VPSUBW Y9, Y3, Y3 + VPSRAW $0x0f, Y0, Y4 + VPSRAW $0x0f, Y1, Y5 + VPSRAW $0x0f, Y2, Y6 + VPSRAW $0x0f, Y3, Y7 + VPAND Y4, Y9, Y4 + VPAND Y5, Y9, Y5 + VPAND Y6, Y9, Y6 + VPAND Y7, Y9, Y7 + VPADDW Y0, Y4, Y0 + VPADDW Y1, Y5, Y1 + VPADDW Y2, Y6, Y2 + VPADDW Y3, Y7, Y3 + VMOVDQU Y0, 256(AX) + VMOVDQU Y1, 288(AX) + VMOVDQU Y2, 320(AX) + VMOVDQU Y3, 352(AX) + VMOVDQU 384(AX), Y0 + VMOVDQU 416(AX), Y1 + VMOVDQU 448(AX), Y2 + VMOVDQU 480(AX), Y3 + VPMULHW Y8, Y0, Y4 + VPMULHW Y8, Y1, Y5 + VPMULHW Y8, Y2, Y6 + VPMULHW Y8, Y3, Y7 + VPSRAW $0x0a, Y4, Y4 + VPSRAW $0x0a, Y5, Y5 + VPSRAW $0x0a, Y6, Y6 + VPSRAW $0x0a, Y7, Y7 + VPMULLW Y9, Y4, Y4 + VPMULLW Y9, Y5, Y5 + VPMULLW Y9, Y6, Y6 + VPMULLW Y9, Y7, Y7 + VPSUBW Y4, Y0, Y0 + VPSUBW Y5, Y1, Y1 + VPSUBW Y6, Y2, Y2 + VPSUBW Y7, Y3, Y3 + VPSUBW Y9, Y0, Y0 + VPSUBW Y9, Y1, Y1 + VPSUBW Y9, Y2, Y2 + VPSUBW Y9, Y3, Y3 + VPSRAW $0x0f, Y0, Y4 + VPSRAW $0x0f, Y1, Y5 + VPSRAW $0x0f, Y2, Y6 + VPSRAW $0x0f, Y3, Y7 + VPAND Y4, Y9, Y4 + VPAND Y5, Y9, Y5 + VPAND Y6, Y9, Y6 + VPAND Y7, Y9, Y7 + VPADDW Y0, Y4, Y0 + VPADDW Y1, Y5, Y1 + VPADDW Y2, Y6, Y2 + VPADDW Y3, Y7, Y3 + VMOVDQU Y0, 384(AX) + VMOVDQU Y1, 416(AX) + VMOVDQU Y2, 448(AX) + VMOVDQU Y3, 480(AX) + RET diff --git a/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/field.go b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/field.go new file mode 100644 index 0000000..31e93ed --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/field.go @@ -0,0 +1,74 @@ +package common + +// Given -2¹⁵ q ≤ x < 2¹⁵ q, returns -q < y < q with x 2⁻¹⁶ = y (mod q). +func montReduce(x int32) int16 { + // This is Montgomery reduction with R=2¹⁶. + // + // Note gcd(2¹⁶, q) = 1 as q is prime. Write q' := 62209 = q⁻¹ mod R. + // First we compute + // + // m := ((x mod R) q') mod R + // = x q' mod R + // = int16(x q') + // = int16(int32(x) * int32(q')) + // + // Note that x q' might be as big as 2³² and could overflow the int32 + // multiplication in the last line. However for any int32s a and b, + // we have int32(int64(a)*int64(b)) = int32(a*b) and so the result is ok. + m := int16(x * 62209) + + // Note that x - m q is divisible by R; indeed modulo R we have + // + // x - m q ≡ x - x q' q ≡ x - x q⁻¹ q ≡ x - x = 0. + // + // We return y := (x - m q) / R. Note that y is indeed correct as + // modulo q we have + // + // y ≡ x R⁻¹ - m q R⁻¹ = x R⁻¹ + // + // and as both 2¹⁵ q ≤ m q, x < 2¹⁵ q, we have + // 2¹⁶ q ≤ x - m q < 2¹⁶ and so q ≤ (x - m q) / R < q as desired. + return int16(uint32(x-int32(m)*int32(Q)) >> 16) +} + +// Given any x, returns x R mod q where R=2¹⁶. +func toMont(x int16) int16 { + // Note |1353 x| ≤ 1353 2¹⁵ ≤ 13318 q ≤ 2¹⁵ q and so we're within + // the bounds of montReduce. + return montReduce(int32(x) * 1353) // 1353 = R² mod q. +} + +// Given any x, compute 0 ≤ y ≤ q with x = y (mod q). +// +// Beware: we might have barrettReduce(x) = q ≠ 0 for some x. In fact, +// this happens if and only if x = -nq for some positive integer n. +func barrettReduce(x int16) int16 { + // This is standard Barrett reduction. + // + // For any x we have x mod q = x - ⌊x/q⌋ q. We will use 20159/2²⁶ as + // an approximation of 1/q. Note that 0 ≤ 20159/2²⁶ - 1/q ≤ 0.135/2²⁶ + // and so | x 20156/2²⁶ - x/q | ≤ 2⁻¹⁰ for |x| ≤ 2¹⁶. For all x + // not a multiple of q, the number x/q is further than 1/q from any integer + // and so ⌊x 20156/2²⁶⌋ = ⌊x/q⌋. If x is a multiple of q and x is positive, + // then x 20156/2²⁶ is larger than x/q so ⌊x 20156/2²⁶⌋ = ⌊x/q⌋ as well. + // Finally, if x is negative multiple of q, then ⌊x 20156/2²⁶⌋ = ⌊x/q⌋-1. + // Thus + // [ q if x=-nq for pos. integer n + // x - ⌊x 20156/2²⁶⌋ q = [ + // [ x mod q otherwise + // + // To compute actually compute this, note that + // + // ⌊x 20156/2²⁶⌋ = (20159 x) >> 26. + return x - int16((int32(x)*20159)>>26)*Q +} + +// Returns x if x < q and x - q otherwise. Assumes x ≥ -29439. +func csubq(x int16) int16 { + x -= Q // no overflow due to assumption x ≥ -29439. + // If x is positive, then x >> 15 = 0. If x is negative, + // then uint16(x >> 15) = 2¹⁶-1. So this will add back in q + // if x was smaller than q. + x += (x >> 15) & Q + return x +} diff --git a/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/generic.go b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/generic.go new file mode 100644 index 0000000..66e0e86 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/generic.go @@ -0,0 +1,77 @@ +//go:build !amd64 || purego +// +build !amd64 purego + +package common + +// Sets p to a + b. Does not normalize coefficients. +func (p *Poly) Add(a, b *Poly) { + p.addGeneric(a, b) +} + +// Sets p to a - b. Does not normalize coefficients. +func (p *Poly) Sub(a, b *Poly) { + p.subGeneric(a, b) +} + +// Executes an in-place forward "NTT" on p. +// +// Assumes the coefficients are in absolute value ≤q. The resulting +// coefficients are in absolute value ≤7q. If the input is in Montgomery +// form, then the result is in Montgomery form and so (by linearity of the NTT) +// if the input is in regular form, then the result is also in regular form. +// The order of coefficients will be "tangled". These can be put back into +// their proper order by calling Detangle(). +func (p *Poly) NTT() { + p.nttGeneric() +} + +// Executes an in-place inverse "NTT" on p and multiply by the Montgomery +// factor R. +// +// Requires coefficients to be in "tangled" order, see Tangle(). +// Assumes the coefficients are in absolute value ≤q. The resulting +// coefficients are in absolute value ≤q. If the input is in Montgomery +// form, then the result is in Montgomery form and so (by linearity) +// if the input is in regular form, then the result is also in regular form. +func (p *Poly) InvNTT() { + p.invNTTGeneric() +} + +// Sets p to the "pointwise" multiplication of a and b. +// +// That is: InvNTT(p) = InvNTT(a) * InvNTT(b). Assumes a and b are in +// Montgomery form. Products between coefficients of a and b must be strictly +// bounded in absolute value by 2¹⁵q. p will be in Montgomery form and +// bounded in absolute value by 2q. +// +// Requires a and b to be in "tangled" order, see Tangle(). p will be in +// tangled order as well. +func (p *Poly) MulHat(a, b *Poly) { + p.mulHatGeneric(a, b) +} + +// Puts p into the right form to be used with (among others) InvNTT(). +func (p *Poly) Tangle() { + // In the generic implementation there is no advantage to using a + // different order, so we use the standard order everywhere. +} + +// Puts p back into standard form. +func (p *Poly) Detangle() { + // In the generic implementation there is no advantage to using a + // different order, so we use the standard order everywhere. +} + +// Almost normalizes coefficients. +// +// Ensures each coefficient is in {0, …, q}. +func (p *Poly) BarrettReduce() { + p.barrettReduceGeneric() +} + +// Normalizes coefficients. +// +// Ensures each coefficient is in {0, …, q-1}. +func (p *Poly) Normalize() { + p.normalizeGeneric() +} diff --git a/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/ntt.go b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/ntt.go new file mode 100644 index 0000000..5e565b3 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/ntt.go @@ -0,0 +1,193 @@ +package common + +// Zetas lists precomputed powers of the primitive root of unity in +// Montgomery representation used for the NTT: +// +// Zetas[i] = ζᵇʳᵛ⁽ⁱ⁾ R mod q +// +// where ζ = 17, brv(i) is the bitreversal of a 7-bit number and R=2¹⁶ mod q. +// +// The following Python code generates the Zetas arrays: +// +// q = 13*2**8 + 1; zeta = 17 +// R = 2**16 % q # Montgomery const. +// def brv(x): return int(''.join(reversed(bin(x)[2:].zfill(7))),2) +// print([(pow(zeta, brv(i), q)*R)%q for i in range(128)]) +var Zetas = [128]int16{ + 2285, 2571, 2970, 1812, 1493, 1422, 287, 202, 3158, 622, 1577, 182, + 962, 2127, 1855, 1468, 573, 2004, 264, 383, 2500, 1458, 1727, 3199, + 2648, 1017, 732, 608, 1787, 411, 3124, 1758, 1223, 652, 2777, 1015, + 2036, 1491, 3047, 1785, 516, 3321, 3009, 2663, 1711, 2167, 126, + 1469, 2476, 3239, 3058, 830, 107, 1908, 3082, 2378, 2931, 961, 1821, + 2604, 448, 2264, 677, 2054, 2226, 430, 555, 843, 2078, 871, 1550, + 105, 422, 587, 177, 3094, 3038, 2869, 1574, 1653, 3083, 778, 1159, + 3182, 2552, 1483, 2727, 1119, 1739, 644, 2457, 349, 418, 329, 3173, + 3254, 817, 1097, 603, 610, 1322, 2044, 1864, 384, 2114, 3193, 1218, + 1994, 2455, 220, 2142, 1670, 2144, 1799, 2051, 794, 1819, 2475, + 2459, 478, 3221, 3021, 996, 991, 958, 1869, 1522, 1628, +} + +// InvNTTReductions keeps track of which coefficients to apply Barrett +// reduction to in Poly.InvNTT(). +// +// Generated in a lazily: once a butterfly is computed which is about to +// overflow the int16, the largest coefficient is reduced. If that is +// not enough, the other coefficient is reduced as well. +// +// This is actually optimal, as proven in https://eprint.iacr.org/2020/1377.pdf +var InvNTTReductions = [...]int{ + -1, // after layer 1 + -1, // after layer 2 + 16, 17, 48, 49, 80, 81, 112, 113, 144, 145, 176, 177, 208, 209, 240, + 241, -1, // after layer 3 + 0, 1, 32, 33, 34, 35, 64, 65, 96, 97, 98, 99, 128, 129, 160, 161, 162, 163, + 192, 193, 224, 225, 226, 227, -1, // after layer 4 + 2, 3, 66, 67, 68, 69, 70, 71, 130, 131, 194, 195, 196, 197, 198, + 199, -1, // after layer 5 + 4, 5, 6, 7, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, + 143, -1, // after layer 6 + -1, // after layer 7 +} + +// Executes an in-place forward "NTT" on p. +// +// Assumes the coefficients are in absolute value ≤q. The resulting +// coefficients are in absolute value ≤7q. If the input is in Montgomery +// form, then the result is in Montgomery form and so (by linearity of the NTT) +// if the input is in regular form, then the result is also in regular form. +// The order of coefficients will be "tangled". These can be put back into +// their proper order by calling Detangle(). +func (p *Poly) nttGeneric() { + // Note that ℤ_q does not have a primitive 512ᵗʰ root of unity (as 512 + // does not divide into q-1) and so we cannot do a regular NTT. ℤ_q + // does have a primitive 256ᵗʰ root of unity, the smallest of which + // is ζ := 17. + // + // Recall that our base ring R := ℤ_q[x] / (x²⁵⁶ + 1). The polynomial + // x²⁵⁶+1 will not split completely (as its roots would be 512ᵗʰ roots + // of unity.) However, it does split almost (using ζ¹²⁸ = -1): + // + // x²⁵⁶ + 1 = (x²)¹²⁸ - ζ¹²⁸ + // = ((x²)⁶⁴ - ζ⁶⁴)((x²)⁶⁴ + ζ⁶⁴) + // = ((x²)³² - ζ³²)((x²)³² + ζ³²)((x²)³² - ζ⁹⁶)((x²)³² + ζ⁹⁶) + // ⋮ + // = (x² - ζ)(x² + ζ)(x² - ζ⁶⁵)(x² + ζ⁶⁵) … (x² + ζ¹²⁷) + // + // Note that the powers of ζ that appear (from the second line down) are + // in binary + // + // 0100000 1100000 + // 0010000 1010000 0110000 1110000 + // 0001000 1001000 0101000 1101000 0011000 1011000 0111000 1111000 + // … + // + // That is: brv(2), brv(3), brv(4), …, where brv(x) denotes the 7-bit + // bitreversal of x. These powers of ζ are given by the Zetas array. + // + // The polynomials x² ± ζⁱ are irreducible and coprime, hence by + // the Chinese Remainder Theorem we know + // + // ℤ_q[x]/(x²⁵⁶+1) → ℤ_q[x]/(x²-ζ) x … x ℤ_q[x]/(x²+ζ¹²⁷) + // + // given by a ↦ ( a mod x²-ζ, …, a mod x²+ζ¹²⁷ ) + // is an isomorphism, which is the "NTT". It can be efficiently computed by + // + // + // a ↦ ( a mod (x²)⁶⁴ - ζ⁶⁴, a mod (x²)⁶⁴ + ζ⁶⁴ ) + // ↦ ( a mod (x²)³² - ζ³², a mod (x²)³² + ζ³², + // a mod (x²)⁹⁶ - ζ⁹⁶, a mod (x²)⁹⁶ + ζ⁹⁶ ) + // + // et cetera + // + // If N was 8 then this can be pictured in the following diagram: + // + // https://cnx.org/resources/17ee4dfe517a6adda05377b25a00bf6e6c93c334/File0026.png + // + // Each cross is a Cooley-Tukey butterfly: it's the map + // + // (a, b) ↦ (a + ζb, a - ζb) + // + // for the appropriate power ζ for that column and row group. + + k := 0 // Index into Zetas + + // l runs effectively over the columns in the diagram above; it is half the + // height of a row group, i.e. the number of butterflies in each row group. + // In the diagram above it would be 4, 2, 1. + for l := N / 2; l > 1; l >>= 1 { + // On the nᵗʰ iteration of the l-loop, the absolute value of the + // coefficients are bounded by nq. + + // offset effectively loops over the row groups in this column; it is + // the first row in the row group. + for offset := 0; offset < N-l; offset += 2 * l { + k++ + zeta := int32(Zetas[k]) + + // j loops over each butterfly in the row group. + for j := offset; j < offset+l; j++ { + t := montReduce(zeta * int32(p[j+l])) + p[j+l] = p[j] - t + p[j] += t + } + } + } +} + +// Executes an in-place inverse "NTT" on p and multiply by the Montgomery +// factor R. +// +// Requires coefficients to be in "tangled" order, see Tangle(). +// Assumes the coefficients are in absolute value ≤q. The resulting +// coefficients are in absolute value ≤q. If the input is in Montgomery +// form, then the result is in Montgomery form and so (by linearity) +// if the input is in regular form, then the result is also in regular form. +func (p *Poly) invNTTGeneric() { + k := 127 // Index into Zetas + r := -1 // Index into InvNTTReductions. + + // We basically do the opposite of NTT, but postpone dividing by 2 in the + // inverse of the Cooley-Tukey butterfly and accumulate that into a big + // division by 2⁷ at the end. See the comments in the NTT() function. + + for l := 2; l < N; l <<= 1 { + for offset := 0; offset < N-l; offset += 2 * l { + // As we're inverting, we need powers of ζ⁻¹ (instead of ζ). + // To be precise, we need ζᵇʳᵛ⁽ᵏ⁾⁻¹²⁸. However, as ζ⁻¹²⁸ = -1, + // we can use the existing Zetas table instead of + // keeping a separate InvZetas table as in Dilithium. + + minZeta := int32(Zetas[k]) + k-- + + for j := offset; j < offset+l; j++ { + // Gentleman-Sande butterfly: (a, b) ↦ (a + b, ζ(a-b)) + t := p[j+l] - p[j] + p[j] += p[j+l] + p[j+l] = montReduce(minZeta * int32(t)) + + // Note that if we had |a| < αq and |b| < βq before the + // butterfly, then now we have |a| < (α+β)q and |b| < q. + } + } + + // We let the InvNTTReductions instruct us which coefficients to + // Barrett reduce. See TestInvNTTReductions, which tests whether + // there is an overflow. + for { + r++ + i := InvNTTReductions[r] + if i < 0 { + break + } + p[i] = barrettReduce(p[i]) + } + } + + for j := 0; j < N; j++ { + // Note 1441 = (128)⁻¹ R². The coefficients are bounded by 9q, so + // as 1441 * 9 ≈ 2¹⁴ < 2¹⁵, we're within the required bounds + // for montReduce(). + p[j] = montReduce(1441 * int32(p[j])) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/params.go b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/params.go new file mode 100644 index 0000000..f04d1aa --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/params.go @@ -0,0 +1,22 @@ +package common + +import ( + "github.com/cloudflare/circl/pke/kyber/internal/common/params" +) + +const ( + // Q is the parameter q ≡ 3329 = 2¹¹ + 2¹⁰ + 2⁸ + 1. + Q = params.Q + + // N is the parameter N: the length of the polynomials + N = params.N + + // PolySize is the size of a packed polynomial. + PolySize = params.PolySize + + // PlaintextSize is the size of the plaintext + PlaintextSize = params.PlaintextSize + + // Eta2 is the parameter η₂ + Eta2 = params.Eta2 +) diff --git a/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/params/params.go b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/params/params.go new file mode 100644 index 0000000..dee58ee --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/params/params.go @@ -0,0 +1,21 @@ +package params + +// We put these parameters in a separate package so that the Go code, +// such as asm/src.go, that generates assembler can import it. + +const ( + // Q is the parameter q ≡ 3329 = 2¹¹ + 2¹⁰ + 2⁸ + 1. + Q int16 = 3329 + + // N is the parameter N: the length of the polynomials + N = 256 + + // PolySize is the size of a packed polynomial. + PolySize = 384 + + // PlaintextSize is the size of the plaintext + PlaintextSize = 32 + + // Eta2 is the parameter η₂ + Eta2 = 2 +) diff --git a/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/poly.go b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/poly.go new file mode 100644 index 0000000..f580e91 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/poly.go @@ -0,0 +1,332 @@ +package common + +// An element of our base ring R which are polynomials over ℤ_q +// modulo the equation Xᴺ = -1, where q=3329 and N=256. +// +// This type is also used to store NTT-transformed polynomials, +// see Poly.NTT(). +// +// Coefficients aren't always reduced. See Normalize(). +type Poly [N]int16 + +// Sets p to a + b. Does not normalize coefficients. +func (p *Poly) addGeneric(a, b *Poly) { + for i := 0; i < N; i++ { + p[i] = a[i] + b[i] + } +} + +// Sets p to a - b. Does not normalize coefficients. +func (p *Poly) subGeneric(a, b *Poly) { + for i := 0; i < N; i++ { + p[i] = a[i] - b[i] + } +} + +// Almost normalizes coefficients. +// +// Ensures each coefficient is in {0, …, q}. +func (p *Poly) barrettReduceGeneric() { + for i := 0; i < N; i++ { + p[i] = barrettReduce(p[i]) + } +} + +// Normalizes coefficients. +// +// Ensures each coefficient is in {0, …, q-1}. +func (p *Poly) normalizeGeneric() { + for i := 0; i < N; i++ { + p[i] = csubq(barrettReduce(p[i])) + } +} + +// Multiplies p in-place by the Montgomery factor 2¹⁶. +// +// Coefficients of p can be arbitrary. Resulting coefficients are bounded +// in absolute value by q. +func (p *Poly) ToMont() { + for i := 0; i < N; i++ { + p[i] = toMont(p[i]) + } +} + +// Sets p to the "pointwise" multiplication of a and b. +// +// That is: InvNTT(p) = InvNTT(a) * InvNTT(b). Assumes a and b are in +// Montgomery form. Products between coefficients of a and b must be strictly +// bounded in absolute value by 2¹⁵q. p will be in Montgomery form and +// bounded in absolute value by 2q. +// +// Requires a and b to be in "tangled" order, see Tangle(). p will be in +// tangled order as well. +func (p *Poly) mulHatGeneric(a, b *Poly) { + // Recall from the discussion in NTT(), that a transformed polynomial is + // an element of ℤ_q[x]/(x²-ζ) x … x ℤ_q[x]/(x²+ζ¹²⁷); + // that is: 128 degree-one polynomials instead of simply 256 elements + // from ℤ_q as in the regular NTT. So instead of pointwise multiplication, + // we multiply the 128 pairs of degree-one polynomials modulo the + // right equation: + // + // (a₁ + a₂x)(b₁ + b₂x) = a₁b₁ + a₂b₂ζ' + (a₁b₂ + a₂b₁)x, + // + // where ζ' is the appropriate power of ζ. + + k := 64 + for i := 0; i < N; i += 4 { + zeta := int32(Zetas[k]) + k++ + + p0 := montReduce(int32(a[i+1]) * int32(b[i+1])) + p0 = montReduce(int32(p0) * zeta) + p0 += montReduce(int32(a[i]) * int32(b[i])) + + p1 := montReduce(int32(a[i]) * int32(b[i+1])) + p1 += montReduce(int32(a[i+1]) * int32(b[i])) + + p[i] = p0 + p[i+1] = p1 + + p2 := montReduce(int32(a[i+3]) * int32(b[i+3])) + p2 = -montReduce(int32(p2) * zeta) + p2 += montReduce(int32(a[i+2]) * int32(b[i+2])) + + p3 := montReduce(int32(a[i+2]) * int32(b[i+3])) + p3 += montReduce(int32(a[i+3]) * int32(b[i+2])) + + p[i+2] = p2 + p[i+3] = p3 + } +} + +// Packs p into buf. buf should be of length PolySize. +// +// Assumes p is normalized (and not just Barrett reduced) and "tangled", +// see Tangle(). +func (p *Poly) Pack(buf []byte) { + q := *p + q.Detangle() + for i := 0; i < 128; i++ { + t0 := q[2*i] + t1 := q[2*i+1] + buf[3*i] = byte(t0) + buf[3*i+1] = byte(t0>>8) | byte(t1<<4) + buf[3*i+2] = byte(t1 >> 4) + } +} + +// Unpacks p from buf. +// +// buf should be of length PolySize. p will be "tangled", see Detangle(). +// +// p will not be normalized; instead 0 ≤ p[i] < 4096. +func (p *Poly) Unpack(buf []byte) { + for i := 0; i < 128; i++ { + p[2*i] = int16(buf[3*i]) | ((int16(buf[3*i+1]) << 8) & 0xfff) + p[2*i+1] = int16(buf[3*i+1]>>4) | (int16(buf[3*i+2]) << 4) + } + p.Tangle() +} + +// Set p to Decompress_q(m, 1). +// +// p will be normalized. m has to be of PlaintextSize. +func (p *Poly) DecompressMessage(m []byte) { + // Decompress_q(x, 1) = ⌈xq/2⌋ = ⌊xq/2+½⌋ = (xq+1) >> 1 and so + // Decompress_q(0, 1) = 0 and Decompress_q(1, 1) = (q+1)/2. + for i := 0; i < 32; i++ { + for j := 0; j < 8; j++ { + bit := (m[i] >> uint(j)) & 1 + + // Set coefficient to either 0 or (q+1)/2 depending on the bit. + p[8*i+j] = -int16(bit) & ((Q + 1) / 2) + } + } +} + +// Writes Compress_q(p, 1) to m. +// +// Assumes p is normalized. m has to be of length at least PlaintextSize. +func (p *Poly) CompressMessageTo(m []byte) { + // Compress_q(x, 1) is 1 on {833, …, 2496} and zero elsewhere. + for i := 0; i < 32; i++ { + m[i] = 0 + for j := 0; j < 8; j++ { + x := 1664 - p[8*i+j] + // With the previous substitution, we want to return 1 if + // and only if x is in {831, …, -832}. + x = (x >> 15) ^ x + // Note (x >> 15)ˣ if x≥0 and -x-1 otherwise. Thus now we want + // to return 1 iff x ≤ 831, ie. x - 832 < 0. + x -= 832 + m[i] |= ((byte(x >> 15)) & 1) << uint(j) + } + } +} + +// Set p to Decompress_q(m, 1). +// +// Assumes d is in {4, 5, 10, 11}. p will be normalized. +func (p *Poly) Decompress(m []byte, d int) { + // Decompress_q(x, d) = ⌈(q/2ᵈ)x⌋ + // = ⌊(q/2ᵈ)x+½⌋ + // = ⌊(qx + 2ᵈ⁻¹)/2ᵈ⌋ + // = (qx + (1<<(d-1))) >> d + switch d { + case 4: + for i := 0; i < N/2; i++ { + p[2*i] = int16(((1 << 3) + + uint32(m[i]&15)*uint32(Q)) >> 4) + p[2*i+1] = int16(((1 << 3) + + uint32(m[i]>>4)*uint32(Q)) >> 4) + } + case 5: + var t [8]uint16 + idx := 0 + for i := 0; i < N/8; i++ { + t[0] = uint16(m[idx]) + t[1] = (uint16(m[idx]) >> 5) | (uint16(m[idx+1] << 3)) + t[2] = uint16(m[idx+1]) >> 2 + t[3] = (uint16(m[idx+1]) >> 7) | (uint16(m[idx+2] << 1)) + t[4] = (uint16(m[idx+2]) >> 4) | (uint16(m[idx+3] << 4)) + t[5] = uint16(m[idx+3]) >> 1 + t[6] = (uint16(m[idx+3]) >> 6) | (uint16(m[idx+4] << 2)) + t[7] = uint16(m[idx+4]) >> 3 + + for j := 0; j < 8; j++ { + p[8*i+j] = int16(((1 << 4) + + uint32(t[j]&((1<<5)-1))*uint32(Q)) >> 5) + } + + idx += 5 + } + + case 10: + var t [4]uint16 + idx := 0 + for i := 0; i < N/4; i++ { + t[0] = uint16(m[idx]) | (uint16(m[idx+1]) << 8) + t[1] = (uint16(m[idx+1]) >> 2) | (uint16(m[idx+2]) << 6) + t[2] = (uint16(m[idx+2]) >> 4) | (uint16(m[idx+3]) << 4) + t[3] = (uint16(m[idx+3]) >> 6) | (uint16(m[idx+4]) << 2) + + for j := 0; j < 4; j++ { + p[4*i+j] = int16(((1 << 9) + + uint32(t[j]&((1<<10)-1))*uint32(Q)) >> 10) + } + + idx += 5 + } + case 11: + var t [8]uint16 + idx := 0 + for i := 0; i < N/8; i++ { + t[0] = uint16(m[idx]) | (uint16(m[idx+1]) << 8) + t[1] = (uint16(m[idx+1]) >> 3) | (uint16(m[idx+2]) << 5) + t[2] = (uint16(m[idx+2]) >> 6) | (uint16(m[idx+3]) << 2) | (uint16(m[idx+4]) << 10) + t[3] = (uint16(m[idx+4]) >> 1) | (uint16(m[idx+5]) << 7) + t[4] = (uint16(m[idx+5]) >> 4) | (uint16(m[idx+6]) << 4) + t[5] = (uint16(m[idx+6]) >> 7) | (uint16(m[idx+7]) << 1) | (uint16(m[idx+8]) << 9) + t[6] = (uint16(m[idx+8]) >> 2) | (uint16(m[idx+9]) << 6) + t[7] = (uint16(m[idx+9]) >> 5) | (uint16(m[idx+10]) << 3) + + for j := 0; j < 8; j++ { + p[8*i+j] = int16(((1 << 10) + + uint32(t[j]&((1<<11)-1))*uint32(Q)) >> 11) + } + + idx += 11 + } + default: + panic("unsupported d") + } +} + +// Writes Compress_q(p, d) to m. +// +// Assumes p is normalized and d is in {4, 5, 10, 11}. +func (p *Poly) CompressTo(m []byte, d int) { + // Compress_q(x, d) = ⌈(2ᵈ/q)x⌋ mod⁺ 2ᵈ + // = ⌊(2ᵈ/q)x+½⌋ mod⁺ 2ᵈ + // = ⌊((x << d) + q/2) / q⌋ mod⁺ 2ᵈ + // = DIV((x << d) + q/2, q) & ((1<>e, where a/(2^e) ≈ 1/q. + // For d in {10,11} we use 20,642,679/2^36, which computes division by x/q + // correctly for 0 ≤ x < 41,522,616, which fits (q << 11) + q/2 comfortably. + // For d in {4,5} we use 315/2^20, which doesn't compute division by x/q + // correctly for all inputs, but it's close enough that the end result + // of the compression is correct. The advantage is that we do not need + // to use a 64-bit intermediate value. + switch d { + case 4: + var t [8]uint16 + idx := 0 + for i := 0; i < N/8; i++ { + for j := 0; j < 8; j++ { + t[j] = uint16((((uint32(p[8*i+j])<<4)+uint32(Q)/2)*315)>> + 20) & ((1 << 4) - 1) + } + m[idx] = byte(t[0]) | byte(t[1]<<4) + m[idx+1] = byte(t[2]) | byte(t[3]<<4) + m[idx+2] = byte(t[4]) | byte(t[5]<<4) + m[idx+3] = byte(t[6]) | byte(t[7]<<4) + idx += 4 + } + + case 5: + var t [8]uint16 + idx := 0 + for i := 0; i < N/8; i++ { + for j := 0; j < 8; j++ { + t[j] = uint16((((uint32(p[8*i+j])<<5)+uint32(Q)/2)*315)>> + 20) & ((1 << 5) - 1) + } + m[idx] = byte(t[0]) | byte(t[1]<<5) + m[idx+1] = byte(t[1]>>3) | byte(t[2]<<2) | byte(t[3]<<7) + m[idx+2] = byte(t[3]>>1) | byte(t[4]<<4) + m[idx+3] = byte(t[4]>>4) | byte(t[5]<<1) | byte(t[6]<<6) + m[idx+4] = byte(t[6]>>2) | byte(t[7]<<3) + idx += 5 + } + + case 10: + var t [4]uint16 + idx := 0 + for i := 0; i < N/4; i++ { + for j := 0; j < 4; j++ { + t[j] = uint16((uint64((uint32(p[4*i+j])<<10)+uint32(Q)/2)* + 20642679)>>36) & ((1 << 10) - 1) + } + m[idx] = byte(t[0]) + m[idx+1] = byte(t[0]>>8) | byte(t[1]<<2) + m[idx+2] = byte(t[1]>>6) | byte(t[2]<<4) + m[idx+3] = byte(t[2]>>4) | byte(t[3]<<6) + m[idx+4] = byte(t[3] >> 2) + idx += 5 + } + case 11: + var t [8]uint16 + idx := 0 + for i := 0; i < N/8; i++ { + for j := 0; j < 8; j++ { + t[j] = uint16((uint64((uint32(p[8*i+j])<<11)+uint32(Q)/2)* + 20642679)>>36) & ((1 << 11) - 1) + } + m[idx] = byte(t[0]) + m[idx+1] = byte(t[0]>>8) | byte(t[1]<<3) + m[idx+2] = byte(t[1]>>5) | byte(t[2]<<6) + m[idx+3] = byte(t[2] >> 2) + m[idx+4] = byte(t[2]>>10) | byte(t[3]<<1) + m[idx+5] = byte(t[3]>>7) | byte(t[4]<<4) + m[idx+6] = byte(t[4]>>4) | byte(t[5]<<7) + m[idx+7] = byte(t[5] >> 1) + m[idx+8] = byte(t[5]>>9) | byte(t[6]<<2) + m[idx+9] = byte(t[6]>>6) | byte(t[7]<<5) + m[idx+10] = byte(t[7] >> 3) + idx += 11 + } + default: + panic("unsupported d") + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/sample.go b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/sample.go new file mode 100644 index 0000000..ed5a33d --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/sample.go @@ -0,0 +1,236 @@ +package common + +import ( + "encoding/binary" + + "github.com/cloudflare/circl/internal/sha3" + "github.com/cloudflare/circl/simd/keccakf1600" +) + +// DeriveX4Available indicates whether the system supports the quick fourway +// sampling variants like PolyDeriveUniformX4. +var DeriveX4Available = keccakf1600.IsEnabledX4() + +// Samples p from a centered binomial distribution with given η. +// +// Essentially CBD_η(PRF(seed, nonce)) from the specification. +func (p *Poly) DeriveNoise(seed []byte, nonce uint8, eta int) { + switch eta { + case 2: + p.DeriveNoise2(seed, nonce) + case 3: + p.DeriveNoise3(seed, nonce) + default: + panic("unsupported eta") + } +} + +// Sample p from a centered binomial distribution with n=6 and p=½ - that is: +// coefficients are in {-3, -2, -1, 0, 1, 2, 3} with probabilities {1/64, 3/32, +// 15/64, 5/16, 16/64, 3/32, 1/64}. +func (p *Poly) DeriveNoise3(seed []byte, nonce uint8) { + keySuffix := [1]byte{nonce} + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + _, _ = h.Write(keySuffix[:]) + + // The distribution at hand is exactly the same as that + // of (a₁ + a₂ + a₃) - (b₁ + b₂+b₃) where a_i,b_i~U(1). Thus we need + // 6 bits per coefficients, thus 192 bytes of input entropy. + + // We add two extra zero bytes in the buffer to be able to read 8 bytes + // at the same time (while using only 6.) + var buf [192 + 2]byte + _, _ = h.Read(buf[:192]) + + for i := 0; i < 32; i++ { + // t is interpreted as a₁ + 2a₂ + 4a₃ + 8b₁ + 16b₂ + …. + t := binary.LittleEndian.Uint64(buf[6*i:]) + + d := t & 0x249249249249 // a₁ + 8b₁ + … + d += (t >> 1) & 0x249249249249 // a₁ + a₂ + 8(b₁ + b₂) + … + d += (t >> 2) & 0x249249249249 // a₁ + a₂ + a₃ + 4(b₁ + b₂ + b₃) + … + + for j := 0; j < 8; j++ { + a := int16(d) & 0x7 // a₁ + a₂ + a₃ + d >>= 3 + b := int16(d) & 0x7 // b₁ + b₂ + b₃ + d >>= 3 + p[8*i+j] = a - b + } + } +} + +// Sample p from a centered binomial distribution with n=4 and p=½ - that is: +// coefficients are in {-2, -1, 0, 1, 2} with probabilities {1/16, 1/4, +// 3/8, 1/4, 1/16}. +func (p *Poly) DeriveNoise2(seed []byte, nonce uint8) { + keySuffix := [1]byte{nonce} + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + _, _ = h.Write(keySuffix[:]) + + // The distribution at hand is exactly the same as that + // of (a + a') - (b + b') where a,a',b,b'~U(1). Thus we need 4 bits per + // coefficients, thus 128 bytes of input entropy. + + var buf [128]byte + _, _ = h.Read(buf[:]) + + for i := 0; i < 16; i++ { + // t is interpreted as a + 2a' + 4b + 8b' + …. + t := binary.LittleEndian.Uint64(buf[8*i:]) + + d := t & 0x5555555555555555 // a + 4b + … + d += (t >> 1) & 0x5555555555555555 // a+a' + 4(b + b') + … + + for j := 0; j < 16; j++ { + a := int16(d) & 0x3 + d >>= 2 + b := int16(d) & 0x3 + d >>= 2 + p[16*i+j] = a - b + } + } +} + +// For each i, sample ps[i] uniformly from the given seed for coordinates +// xs[i] and ys[i]. ps[i] may be nil and is ignored in that case. +// +// Can only be called when DeriveX4Available is true. +func PolyDeriveUniformX4(ps [4]*Poly, seed *[32]byte, xs, ys [4]uint8) { + var perm keccakf1600.StateX4 + state := perm.Initialize(false) + + // Absorb the seed in the four states + for i := 0; i < 4; i++ { + v := binary.LittleEndian.Uint64(seed[8*i : 8*(i+1)]) + for j := 0; j < 4; j++ { + state[i*4+j] = v + } + } + + // Absorb the coordinates, the SHAKE128 domain separator (0b1111), the + // start of the padding (0b…001) and the end of the padding 0b100…. + // Recall that the rate of SHAKE128 is 168; ie. 21 uint64s. + for j := 0; j < 4; j++ { + state[4*4+j] = uint64(xs[j]) | (uint64(ys[j]) << 8) | (0x1f << 16) + state[20*4+j] = 0x80 << 56 + } + + var idx [4]int // indices into ps + for j := 0; j < 4; j++ { + if ps[j] == nil { + idx[j] = N // mark nil polynomials as completed + } + } + + done := false + for !done { + // Applies KeccaK-f[1600] to state to get the next 21 uint64s of each of + // the four SHAKE128 streams. + perm.Permute() + + done = true + + PolyLoop: + for j := 0; j < 4; j++ { + if idx[j] == N { + continue + } + for i := 0; i < 7; i++ { + var t [16]uint16 + + v1 := state[i*3*4+j] + v2 := state[(i*3+1)*4+j] + v3 := state[(i*3+2)*4+j] + + t[0] = uint16(v1) & 0xfff + t[1] = uint16(v1>>12) & 0xfff + t[2] = uint16(v1>>24) & 0xfff + t[3] = uint16(v1>>36) & 0xfff + t[4] = uint16(v1>>48) & 0xfff + t[5] = uint16((v1>>60)|(v2<<4)) & 0xfff + + t[6] = uint16(v2>>8) & 0xfff + t[7] = uint16(v2>>20) & 0xfff + t[8] = uint16(v2>>32) & 0xfff + t[9] = uint16(v2>>44) & 0xfff + t[10] = uint16((v2>>56)|(v3<<8)) & 0xfff + + t[11] = uint16(v3>>4) & 0xfff + t[12] = uint16(v3>>16) & 0xfff + t[13] = uint16(v3>>28) & 0xfff + t[14] = uint16(v3>>40) & 0xfff + t[15] = uint16(v3>>52) & 0xfff + + for k := 0; k < 16; k++ { + if t[k] < uint16(Q) { + ps[j][idx[j]] = int16(t[k]) + idx[j]++ + if idx[j] == N { + continue PolyLoop + } + } + } + } + + done = false + } + } + + for i := 0; i < 4; i++ { + if ps[i] != nil { + ps[i].Tangle() + } + } +} + +// Sample p uniformly from the given seed and x and y coordinates. +// +// Coefficients are reduced and will be in "tangled" order. See Tangle(). +func (p *Poly) DeriveUniform(seed *[32]byte, x, y uint8) { + var seedSuffix [2]byte + var buf [168]byte // rate of SHAKE-128 + + seedSuffix[0] = x + seedSuffix[1] = y + + h := sha3.NewShake128() + _, _ = h.Write(seed[:]) + _, _ = h.Write(seedSuffix[:]) + + i := 0 + for { + _, _ = h.Read(buf[:]) + + for j := 0; j < 168; j += 3 { + t1 := (uint16(buf[j]) | (uint16(buf[j+1]) << 8)) & 0xfff + t2 := (uint16(buf[j+1]>>4) | (uint16(buf[j+2]) << 4)) & 0xfff + + if t1 < uint16(Q) { + p[i] = int16(t1) + i++ + + if i == N { + break + } + } + + if t2 < uint16(Q) { + p[i] = int16(t2) + i++ + + if i == N { + break + } + } + } + + if i == N { + break + } + } + + p.Tangle() +} diff --git a/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/stubs_amd64.go b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/stubs_amd64.go new file mode 100644 index 0000000..4b4700d --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pke/kyber/internal/common/stubs_amd64.go @@ -0,0 +1,32 @@ +// Code generated by command: go run src.go -out ../amd64.s -stubs ../stubs_amd64.go -pkg common. DO NOT EDIT. + +//go:build amd64 && !purego + +package common + +//go:noescape +func addAVX2(p *[256]int16, a *[256]int16, b *[256]int16) + +//go:noescape +func subAVX2(p *[256]int16, a *[256]int16, b *[256]int16) + +//go:noescape +func nttAVX2(p *[256]int16) + +//go:noescape +func invNttAVX2(p *[256]int16) + +//go:noescape +func mulHatAVX2(p *[256]int16, a *[256]int16, b *[256]int16) + +//go:noescape +func detangleAVX2(p *[256]int16) + +//go:noescape +func tangleAVX2(p *[256]int16) + +//go:noescape +func barrettReduceAVX2(p *[256]int16) + +//go:noescape +func normalizeAVX2(p *[256]int16) diff --git a/backend/vendor/github.com/cloudflare/circl/pke/kyber/kyber768/internal/cpapke.go b/backend/vendor/github.com/cloudflare/circl/pke/kyber/kyber768/internal/cpapke.go new file mode 100644 index 0000000..bea07e8 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pke/kyber/kyber768/internal/cpapke.go @@ -0,0 +1,192 @@ +// Code generated from kyber512/internal/cpapke.go by gen.go + +package internal + +import ( + "bytes" + + "github.com/cloudflare/circl/internal/sha3" + "github.com/cloudflare/circl/kem" + "github.com/cloudflare/circl/pke/kyber/internal/common" +) + +// A Kyber.CPAPKE private key. +type PrivateKey struct { + sh Vec // NTT(s), normalized +} + +// A Kyber.CPAPKE public key. +type PublicKey struct { + rho [32]byte // ρ, the seed for the matrix A + th Vec // NTT(t), normalized + + // cached values + aT Mat // the matrix Aᵀ +} + +// Packs the private key to buf. +func (sk *PrivateKey) Pack(buf []byte) { + sk.sh.Pack(buf) +} + +// Unpacks the private key from buf. +func (sk *PrivateKey) Unpack(buf []byte) { + sk.sh.Unpack(buf) + sk.sh.Normalize() +} + +// Packs the public key to buf. +func (pk *PublicKey) Pack(buf []byte) { + pk.th.Pack(buf) + copy(buf[K*common.PolySize:], pk.rho[:]) +} + +// Unpacks the public key from buf. Checks if the public key is normalized. +func (pk *PublicKey) UnpackMLKEM(buf []byte) error { + pk.Unpack(buf) + + // FIPS 203 §7.2 "encapsulation key check" (2). + var buf2 [K * common.PolySize]byte + pk.th.Pack(buf2[:]) + if !bytes.Equal(buf[:len(buf2)], buf2[:]) { + return kem.ErrPubKey + } + return nil +} + +// Unpacks the public key from buf. +func (pk *PublicKey) Unpack(buf []byte) { + pk.th.Unpack(buf) + pk.th.Normalize() + copy(pk.rho[:], buf[K*common.PolySize:]) + pk.aT.Derive(&pk.rho, true) +} + +// Derives a new Kyber.CPAPKE keypair from the given seed. +func NewKeyFromSeed(seed []byte) (*PublicKey, *PrivateKey) { + var pk PublicKey + var sk PrivateKey + + var expandedSeed [64]byte + + h := sha3.New512() + _, _ = h.Write(seed) + + // This writes hash into expandedSeed. Yes, this is idiomatic Go. + _, _ = h.Read(expandedSeed[:]) + + copy(pk.rho[:], expandedSeed[:32]) + sigma := expandedSeed[32:] // σ, the noise seed + + pk.aT.Derive(&pk.rho, false) // Expand ρ to matrix A; we'll transpose later + + var eh Vec + sk.sh.DeriveNoise(sigma, 0, Eta1) // Sample secret vector s + sk.sh.NTT() + sk.sh.Normalize() + + eh.DeriveNoise(sigma, K, Eta1) // Sample blind e + eh.NTT() + + // Next, we compute t = A s + e. + for i := 0; i < K; i++ { + // Note that coefficients of s are bounded by q and those of A + // are bounded by 4.5q and so their product is bounded by 2¹⁵q + // as required for multiplication. + PolyDotHat(&pk.th[i], &pk.aT[i], &sk.sh) + + // A and s were not in Montgomery form, so the Montgomery + // multiplications in the inner product added a factor R⁻¹ which + // we'll cancel out now. This will also ensure the coefficients of + // t are bounded in absolute value by q. + pk.th[i].ToMont() + } + + pk.th.Add(&pk.th, &eh) // bounded by 8q. + pk.th.Normalize() + pk.aT.Transpose() + + return &pk, &sk +} + +// Decrypts ciphertext ct meant for private key sk to plaintext pt. +func (sk *PrivateKey) DecryptTo(pt, ct []byte) { + var u Vec + var v, m common.Poly + + u.Decompress(ct, DU) + v.Decompress(ct[K*compressedPolySize(DU):], DV) + + // Compute m = v - + u.NTT() + PolyDotHat(&m, &sk.sh, &u) + m.BarrettReduce() + m.InvNTT() + m.Sub(&v, &m) + m.Normalize() + + // Compress polynomial m to original message + m.CompressMessageTo(pt) +} + +// Encrypts message pt for the public key to ciphertext ct using randomness +// from seed. +// +// seed has to be of length SeedSize, pt of PlaintextSize and ct of +// CiphertextSize. +func (pk *PublicKey) EncryptTo(ct, pt, seed []byte) { + var rh, e1, u Vec + var e2, v, m common.Poly + + // Sample r, e₁ and e₂ from B_η + rh.DeriveNoise(seed, 0, Eta1) + rh.NTT() + rh.BarrettReduce() + + e1.DeriveNoise(seed, K, common.Eta2) + e2.DeriveNoise(seed, 2*K, common.Eta2) + + // Next we compute u = Aᵀ r + e₁. First Aᵀ. + for i := 0; i < K; i++ { + // Note that coefficients of r are bounded by q and those of Aᵀ + // are bounded by 4.5q and so their product is bounded by 2¹⁵q + // as required for multiplication. + PolyDotHat(&u[i], &pk.aT[i], &rh) + } + + u.BarrettReduce() + + // Aᵀ and r were not in Montgomery form, so the Montgomery + // multiplications in the inner product added a factor R⁻¹ which + // the InvNTT cancels out. + u.InvNTT() + + u.Add(&u, &e1) // u = Aᵀ r + e₁ + + // Next compute v = + e₂ + Decompress_q(m, 1). + PolyDotHat(&v, &pk.th, &rh) + v.BarrettReduce() + v.InvNTT() + + m.DecompressMessage(pt) + v.Add(&v, &m) + v.Add(&v, &e2) // v = + e₂ + Decompress_q(m, 1) + + // Pack ciphertext + u.Normalize() + v.Normalize() + + u.CompressTo(ct, DU) + v.CompressTo(ct[K*compressedPolySize(DU):], DV) +} + +// Returns whether sk equals other. +func (sk *PrivateKey) Equal(other *PrivateKey) bool { + ret := int16(0) + for i := 0; i < K; i++ { + for j := 0; j < common.N; j++ { + ret |= sk.sh[i][j] ^ other.sh[i][j] + } + } + return ret == 0 +} diff --git a/backend/vendor/github.com/cloudflare/circl/pke/kyber/kyber768/internal/mat.go b/backend/vendor/github.com/cloudflare/circl/pke/kyber/kyber768/internal/mat.go new file mode 100644 index 0000000..404aacf --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pke/kyber/kyber768/internal/mat.go @@ -0,0 +1,85 @@ +// Code generated from kyber512/internal/mat.go by gen.go + +package internal + +import ( + "github.com/cloudflare/circl/pke/kyber/internal/common" +) + +// A k by k matrix of polynomials. +type Mat [K]Vec + +// Expands the given seed to the corresponding matrix A or its transpose Aᵀ. +func (m *Mat) Derive(seed *[32]byte, transpose bool) { + if !common.DeriveX4Available { + if transpose { + for i := 0; i < K; i++ { + for j := 0; j < K; j++ { + m[i][j].DeriveUniform(seed, uint8(i), uint8(j)) + } + } + } else { + for i := 0; i < K; i++ { + for j := 0; j < K; j++ { + m[i][j].DeriveUniform(seed, uint8(j), uint8(i)) + } + } + } + return + } + + var ps [4]*common.Poly + var xs [4]uint8 + var ys [4]uint8 + x := uint8(0) + y := uint8(0) + + for x != K { + idx := 0 + for ; idx < 4; idx++ { + ps[idx] = &m[x][y] + + if transpose { + xs[idx] = x + ys[idx] = y + } else { + xs[idx] = y + ys[idx] = x + } + + y++ + if y == K { + x++ + y = 0 + + if x == K { + if idx == 0 { + // If there is just one left, then a plain DeriveUniform + // is quicker than the X4 variant. + ps[0].DeriveUniform(seed, xs[0], ys[0]) + return + } + + for idx++; idx < 4; idx++ { + ps[idx] = nil + } + + break + } + } + } + + common.PolyDeriveUniformX4(ps, seed, xs, ys) + } +} + +// Transposes A in place. +func (m *Mat) Transpose() { + for i := 0; i < K-1; i++ { + for j := i + 1; j < K; j++ { + t := m[i][j] + m[i][j] = m[j][i] + m[j][i] = t + } + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/pke/kyber/kyber768/internal/params.go b/backend/vendor/github.com/cloudflare/circl/pke/kyber/kyber768/internal/params.go new file mode 100644 index 0000000..27cdb1a --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pke/kyber/kyber768/internal/params.go @@ -0,0 +1,21 @@ +// Code generated from params.templ.go. DO NOT EDIT. + +package internal + +import ( + "github.com/cloudflare/circl/pke/kyber/internal/common" +) + +const ( + K = 3 + Eta1 = 2 + DU = 10 + DV = 4 + PublicKeySize = 32 + K*common.PolySize + + PrivateKeySize = K * common.PolySize + + PlaintextSize = common.PlaintextSize + SeedSize = 32 + CiphertextSize = 1088 +) diff --git a/backend/vendor/github.com/cloudflare/circl/pke/kyber/kyber768/internal/vec.go b/backend/vendor/github.com/cloudflare/circl/pke/kyber/kyber768/internal/vec.go new file mode 100644 index 0000000..6681895 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pke/kyber/kyber768/internal/vec.go @@ -0,0 +1,125 @@ +// Code generated from kyber512/internal/vec.go by gen.go + +package internal + +import ( + "github.com/cloudflare/circl/pke/kyber/internal/common" +) + +// A vector of K polynomials +type Vec [K]common.Poly + +// Samples v[i] from a centered binomial distribution with given η, +// seed and nonce+i. +// +// Essentially CBD_η(PRF(seed, nonce+i)) from the specification. +func (v *Vec) DeriveNoise(seed []byte, nonce uint8, eta int) { + for i := 0; i < K; i++ { + v[i].DeriveNoise(seed, nonce+uint8(i), eta) + } +} + +// Sets p to the inner product of a and b using "pointwise" multiplication. +// +// See MulHat() and NTT() for a description of the multiplication. +// Assumes a and b are in Montgomery form. p will be in Montgomery form, +// and its coefficients will be bounded in absolute value by 2kq. +// If a and b are not in Montgomery form, then the action is the same +// as "pointwise" multiplication followed by multiplying by R⁻¹, the inverse +// of the Montgomery factor. +func PolyDotHat(p *common.Poly, a, b *Vec) { + var t common.Poly + *p = common.Poly{} // set p to zero + for i := 0; i < K; i++ { + t.MulHat(&a[i], &b[i]) + p.Add(&t, p) + } +} + +// Almost normalizes coefficients in-place. +// +// Ensures each coefficient is in {0, …, q}. +func (v *Vec) BarrettReduce() { + for i := 0; i < K; i++ { + v[i].BarrettReduce() + } +} + +// Normalizes coefficients in-place. +// +// Ensures each coefficient is in {0, …, q-1}. +func (v *Vec) Normalize() { + for i := 0; i < K; i++ { + v[i].Normalize() + } +} + +// Applies in-place inverse NTT(). See Poly.InvNTT() for assumptions. +func (v *Vec) InvNTT() { + for i := 0; i < K; i++ { + v[i].InvNTT() + } +} + +// Applies in-place forward NTT(). See Poly.NTT() for assumptions. +func (v *Vec) NTT() { + for i := 0; i < K; i++ { + v[i].NTT() + } +} + +// Sets v to a + b. +func (v *Vec) Add(a, b *Vec) { + for i := 0; i < K; i++ { + v[i].Add(&a[i], &b[i]) + } +} + +// Packs v into buf, which must be of length K*PolySize. +func (v *Vec) Pack(buf []byte) { + for i := 0; i < K; i++ { + v[i].Pack(buf[common.PolySize*i:]) + } +} + +// Unpacks v from buf which must be of length K*PolySize. +func (v *Vec) Unpack(buf []byte) { + for i := 0; i < K; i++ { + v[i].Unpack(buf[common.PolySize*i:]) + } +} + +// Writes Compress_q(v, d) to m. +// +// Assumes v is normalized and d is in {3, 4, 5, 10, 11}. +func (v *Vec) CompressTo(m []byte, d int) { + size := compressedPolySize(d) + for i := 0; i < K; i++ { + v[i].CompressTo(m[size*i:], d) + } +} + +// Set v to Decompress_q(m, 1). +// +// Assumes d is in {3, 4, 5, 10, 11}. v will be normalized. +func (v *Vec) Decompress(m []byte, d int) { + size := compressedPolySize(d) + for i := 0; i < K; i++ { + v[i].Decompress(m[size*i:], d) + } +} + +// ⌈(256 d)/8⌉ +func compressedPolySize(d int) int { + switch d { + case 4: + return 128 + case 5: + return 160 + case 10: + return 320 + case 11: + return 352 + } + panic("unsupported d") +} diff --git a/backend/vendor/github.com/cloudflare/circl/pke/kyber/kyber768/kyber.go b/backend/vendor/github.com/cloudflare/circl/pke/kyber/kyber768/kyber.go new file mode 100644 index 0000000..75bb7bd --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pke/kyber/kyber768/kyber.go @@ -0,0 +1,175 @@ +// Code generated from pkg.templ.go. DO NOT EDIT. + +// kyber768 implements the IND-CPA-secure Public Key Encryption +// scheme Kyber768.CPAPKE as submitted to round 3 of the NIST PQC competition +// and described in +// +// https://pq-crystals.org/kyber/data/kyber-specification-round3.pdf +package kyber768 + +import ( + cryptoRand "crypto/rand" + "io" + + "github.com/cloudflare/circl/kem" + "github.com/cloudflare/circl/pke/kyber/kyber768/internal" +) + +const ( + // Size of seed for NewKeyFromSeed + KeySeedSize = internal.SeedSize + + // Size of seed for EncryptTo + EncryptionSeedSize = internal.SeedSize + + // Size of a packed PublicKey + PublicKeySize = internal.PublicKeySize + + // Size of a packed PrivateKey + PrivateKeySize = internal.PrivateKeySize + + // Size of a ciphertext + CiphertextSize = internal.CiphertextSize + + // Size of a plaintext + PlaintextSize = internal.PlaintextSize +) + +// PublicKey is the type of Kyber768.CPAPKE public key +type PublicKey internal.PublicKey + +// PrivateKey is the type of Kyber768.CPAPKE private key +type PrivateKey internal.PrivateKey + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error) { + var seed [KeySeedSize]byte + if rand == nil { + rand = cryptoRand.Reader + } + _, err := io.ReadFull(rand, seed[:]) + if err != nil { + return nil, nil, err + } + pk, sk := internal.NewKeyFromSeed(seed[:]) + return (*PublicKey)(pk), (*PrivateKey)(sk), nil +} + +// NewKeyFromSeed derives a public/private key pair using the given seed. +// +// Note: does not include the domain separation of ML-KEM (line 1, algorithm 13 +// of FIPS 203). For that use NewKeyFromSeedMLKEM(). +// +// Panics if seed is not of length KeySeedSize. +func NewKeyFromSeed(seed []byte) (*PublicKey, *PrivateKey) { + if len(seed) != KeySeedSize { + panic("seed must be of length KeySeedSize") + } + pk, sk := internal.NewKeyFromSeed(seed) + return (*PublicKey)(pk), (*PrivateKey)(sk) +} + +// NewKeyFromSeedMLKEM derives a public/private key pair using the given seed +// using the domain separation of ML-KEM. +// +// Panics if seed is not of length KeySeedSize. +func NewKeyFromSeedMLKEM(seed []byte) (*PublicKey, *PrivateKey) { + if len(seed) != KeySeedSize { + panic("seed must be of length KeySeedSize") + } + var seed2 [33]byte + copy(seed2[:32], seed) + seed2[32] = byte(internal.K) + pk, sk := internal.NewKeyFromSeed(seed2[:]) + return (*PublicKey)(pk), (*PrivateKey)(sk) +} + +// EncryptTo encrypts message pt for the public key and writes the ciphertext +// to ct using randomness from seed. +// +// This function panics if the lengths of pt, seed, and ct are not +// PlaintextSize, EncryptionSeedSize, and CiphertextSize respectively. +func (pk *PublicKey) EncryptTo(ct []byte, pt []byte, seed []byte) { + if len(pt) != PlaintextSize { + panic("pt must be of length PlaintextSize") + } + if len(ct) != CiphertextSize { + panic("ct must be of length CiphertextSize") + } + if len(seed) != EncryptionSeedSize { + panic("seed must be of length EncryptionSeedSize") + } + (*internal.PublicKey)(pk).EncryptTo(ct, pt, seed) +} + +// DecryptTo decrypts message ct for the private key and writes the +// plaintext to pt. +// +// This function panics if the lengths of ct and pt are not +// CiphertextSize and PlaintextSize respectively. +func (sk *PrivateKey) DecryptTo(pt []byte, ct []byte) { + if len(pt) != PlaintextSize { + panic("pt must be of length PlaintextSize") + } + if len(ct) != CiphertextSize { + panic("ct must be of length CiphertextSize") + } + (*internal.PrivateKey)(sk).DecryptTo(pt, ct) +} + +// Packs pk into the given buffer. +// +// Panics if buf is not of length PublicKeySize. +func (pk *PublicKey) Pack(buf []byte) { + if len(buf) != PublicKeySize { + panic("buf must be of size PublicKeySize") + } + (*internal.PublicKey)(pk).Pack(buf) +} + +// Packs sk into the given buffer. +// +// Panics if buf is not of length PrivateKeySize. +func (sk *PrivateKey) Pack(buf []byte) { + if len(buf) != PrivateKeySize { + panic("buf must be of size PrivateKeySize") + } + (*internal.PrivateKey)(sk).Pack(buf) +} + +// Unpacks pk from the given buffer. +// +// Panics if buf is not of length PublicKeySize. +func (pk *PublicKey) Unpack(buf []byte) { + if len(buf) != PublicKeySize { + panic("buf must be of size PublicKeySize") + } + (*internal.PublicKey)(pk).Unpack(buf) +} + +// Unpacks pk from the given buffer. +// +// Returns an error if the buffer is not of the right size, or the public +// key is not normalized. +func (pk *PublicKey) UnpackMLKEM(buf []byte) error { + if len(buf) != PublicKeySize { + return kem.ErrPubKeySize + } + return (*internal.PublicKey)(pk).UnpackMLKEM(buf) +} + +// Unpacks sk from the given buffer. +// +// Panics if buf is not of length PrivateKeySize. +func (sk *PrivateKey) Unpack(buf []byte) { + if len(buf) != PrivateKeySize { + panic("buf must be of size PrivateKeySize") + } + (*internal.PrivateKey)(sk).Unpack(buf) +} + +// Returns whether the two private keys are equal. +func (sk *PrivateKey) Equal(other *PrivateKey) bool { + return (*internal.PrivateKey)(sk).Equal((*internal.PrivateKey)(other)) +} diff --git a/backend/vendor/github.com/cloudflare/circl/pki/pki.go b/backend/vendor/github.com/cloudflare/circl/pki/pki.go new file mode 100644 index 0000000..a2edebd --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/pki/pki.go @@ -0,0 +1,182 @@ +package pki + +import ( + "crypto/x509/pkix" + "encoding/asn1" + "encoding/pem" + "errors" + "strings" + + "github.com/cloudflare/circl/sign" + "github.com/cloudflare/circl/sign/schemes" +) + +var ( + allSchemesByOID map[string]sign.Scheme + allSchemesByTLS map[uint]sign.Scheme +) + +type pkixPrivKey struct { + Version int + Algorithm pkix.AlgorithmIdentifier + PrivateKey []byte +} + +func init() { + allSchemesByOID = make(map[string]sign.Scheme) + allSchemesByTLS = make(map[uint]sign.Scheme) + for _, scheme := range schemes.All() { + if cert, ok := scheme.(CertificateScheme); ok { + allSchemesByOID[cert.Oid().String()] = scheme + } + if tlsScheme, ok := scheme.(TLSScheme); ok { + allSchemesByTLS[tlsScheme.TLSIdentifier()] = scheme + } + } +} + +func SchemeByOid(oid asn1.ObjectIdentifier) sign.Scheme { return allSchemesByOID[oid.String()] } + +func SchemeByTLSID(id uint) sign.Scheme { return allSchemesByTLS[id] } + +// Additional methods when the signature scheme is supported in X509. +type CertificateScheme interface { + // Return the appropriate OIDs for this instance. It is implicitly + // assumed that the encoding is simple: e.g. uses the same OID for + // signature and public key like Ed25519. + Oid() asn1.ObjectIdentifier +} + +// Additional methods when the signature scheme is supported in TLS. +type TLSScheme interface { + TLSIdentifier() uint +} + +func UnmarshalPEMPublicKey(data []byte) (sign.PublicKey, error) { + block, rest := pem.Decode(data) + if len(rest) != 0 { + return nil, errors.New("trailing data") + } + if !strings.HasSuffix(block.Type, "PUBLIC KEY") { + return nil, errors.New("pem block type is not public key") + } + + return UnmarshalPKIXPublicKey(block.Bytes) +} + +func UnmarshalPKIXPublicKey(data []byte) (sign.PublicKey, error) { + var pkix struct { + Raw asn1.RawContent + Algorithm pkix.AlgorithmIdentifier + PublicKey asn1.BitString + } + if rest, err := asn1.Unmarshal(data, &pkix); err != nil { + return nil, err + } else if len(rest) != 0 { + return nil, errors.New("trailing data") + } + scheme := SchemeByOid(pkix.Algorithm.Algorithm) + if scheme == nil { + return nil, errors.New("unsupported public key algorithm") + } + return scheme.UnmarshalBinaryPublicKey(pkix.PublicKey.RightAlign()) +} + +func UnmarshalPEMPrivateKey(data []byte) (sign.PrivateKey, error) { + block, rest := pem.Decode(data) + if len(rest) != 0 { + return nil, errors.New("trailing") + } + if !strings.HasSuffix(block.Type, "PRIVATE KEY") { + return nil, errors.New("pem block type is not private key") + } + + return UnmarshalPKIXPrivateKey(block.Bytes) +} + +func UnmarshalPKIXPrivateKey(data []byte) (sign.PrivateKey, error) { + var pkix pkixPrivKey + if rest, err := asn1.Unmarshal(data, &pkix); err != nil { + return nil, err + } else if len(rest) != 0 { + return nil, errors.New("trailing data") + } + scheme := SchemeByOid(pkix.Algorithm.Algorithm) + if scheme == nil { + return nil, errors.New("unsupported public key algorithm") + } + var sk []byte + if rest, err := asn1.Unmarshal(pkix.PrivateKey, &sk); err != nil { + return nil, err + } else if len(rest) > 0 { + return nil, errors.New("trailing data") + } + return scheme.UnmarshalBinaryPrivateKey(sk) +} + +func MarshalPEMPublicKey(pk sign.PublicKey) ([]byte, error) { + data, err := MarshalPKIXPublicKey(pk) + if err != nil { + return nil, err + } + str := pem.EncodeToMemory(&pem.Block{ + Type: "PUBLIC KEY", + Bytes: data, + }) + return str, nil +} + +func MarshalPKIXPublicKey(pk sign.PublicKey) ([]byte, error) { + data, err := pk.MarshalBinary() + if err != nil { + return nil, err + } + + scheme := pk.Scheme() + return asn1.Marshal(struct { + pkix.AlgorithmIdentifier + asn1.BitString + }{ + pkix.AlgorithmIdentifier{ + Algorithm: scheme.(CertificateScheme).Oid(), + }, + asn1.BitString{ + Bytes: data, + BitLength: len(data) * 8, + }, + }) +} + +func MarshalPEMPrivateKey(sk sign.PrivateKey) ([]byte, error) { + data, err := MarshalPKIXPrivateKey(sk) + if err != nil { + return nil, err + } + str := pem.EncodeToMemory(&pem.Block{ + Type: sk.Scheme().Name() + " PRIVATE KEY", + Bytes: data, + }, + ) + return str, nil +} + +func MarshalPKIXPrivateKey(sk sign.PrivateKey) ([]byte, error) { + data, err := sk.MarshalBinary() + if err != nil { + return nil, err + } + + data, err = asn1.Marshal(data) + if err != nil { + return nil, err + } + + scheme := sk.Scheme() + return asn1.Marshal(pkixPrivKey{ + 0, + pkix.AlgorithmIdentifier{ + Algorithm: scheme.(CertificateScheme).Oid(), + }, + data, + }) +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/dilithium.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/dilithium.go new file mode 100644 index 0000000..5e69389 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/dilithium.go @@ -0,0 +1,295 @@ +// Code generated from pkg.templ.go. DO NOT EDIT. + +// mode2 implements the CRYSTALS-Dilithium signature scheme Dilithium2 +// as submitted to round3 of the NIST PQC competition and described in +// +// https://pq-crystals.org/dilithium/data/dilithium-specification-round3-20210208.pdf +package mode2 + +import ( + "crypto" + "errors" + "io" + + "github.com/cloudflare/circl/sign" + "github.com/cloudflare/circl/sign/dilithium/mode2/internal" + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +const ( + // Size of seed for NewKeyFromSeed + SeedSize = common.SeedSize + + // Size of a packed PublicKey + PublicKeySize = internal.PublicKeySize + + // Size of a packed PrivateKey + PrivateKeySize = internal.PrivateKeySize + + // Size of a signature + SignatureSize = internal.SignatureSize +) + +// PublicKey is the type of Dilithium2 public key +type PublicKey internal.PublicKey + +// PrivateKey is the type of Dilithium2 private key +type PrivateKey internal.PrivateKey + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error) { + pk, sk, err := internal.GenerateKey(rand) + return (*PublicKey)(pk), (*PrivateKey)(sk), err +} + +// NewKeyFromSeed derives a public/private key pair using the given seed. +func NewKeyFromSeed(seed *[SeedSize]byte) (*PublicKey, *PrivateKey) { + pk, sk := internal.NewKeyFromSeed(seed) + return (*PublicKey)(pk), (*PrivateKey)(sk) +} + +// SignTo signs the given message and writes the signature into signature. +// It will panic if signature is not of length at least SignatureSize. +func SignTo(sk *PrivateKey, msg, sig []byte) { + var rnd [32]byte + + internal.SignTo( + (*internal.PrivateKey)(sk), + func(w io.Writer) { + w.Write(msg) + }, + rnd, + sig, + ) +} + +// Verify checks whether the given signature by pk on msg is valid. +func Verify(pk *PublicKey, msg, sig []byte) bool { + return internal.Verify( + (*internal.PublicKey)(pk), + func(w io.Writer) { + _, _ = w.Write(msg) + }, + sig, + ) +} + +// Sets pk to the public key encoded in buf. +func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte) { + (*internal.PublicKey)(pk).Unpack(buf) +} + +// Sets sk to the private key encoded in buf. +func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte) { + (*internal.PrivateKey)(sk).Unpack(buf) +} + +// Packs the public key into buf. +func (pk *PublicKey) Pack(buf *[PublicKeySize]byte) { + (*internal.PublicKey)(pk).Pack(buf) +} + +// Packs the private key into buf. +func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte) { + (*internal.PrivateKey)(sk).Pack(buf) +} + +// Packs the public key. +func (pk *PublicKey) Bytes() []byte { + var buf [PublicKeySize]byte + pk.Pack(&buf) + return buf[:] +} + +// Packs the private key. +func (sk *PrivateKey) Bytes() []byte { + var buf [PrivateKeySize]byte + sk.Pack(&buf) + return buf[:] +} + +// Packs the public key. +func (pk *PublicKey) MarshalBinary() ([]byte, error) { + return pk.Bytes(), nil +} + +// Packs the private key. +func (sk *PrivateKey) MarshalBinary() ([]byte, error) { + return sk.Bytes(), nil +} + +// Unpacks the public key from data. +func (pk *PublicKey) UnmarshalBinary(data []byte) error { + if len(data) != PublicKeySize { + return errors.New("packed public key must be of mode2.PublicKeySize bytes") + } + var buf [PublicKeySize]byte + copy(buf[:], data) + pk.Unpack(&buf) + return nil +} + +// Unpacks the private key from data. +func (sk *PrivateKey) UnmarshalBinary(data []byte) error { + if len(data) != PrivateKeySize { + return errors.New("packed private key must be of mode2.PrivateKeySize bytes") + } + var buf [PrivateKeySize]byte + copy(buf[:], data) + sk.Unpack(&buf) + return nil +} + +// Sign signs the given message. +// +// opts.HashFunc() must return zero, which can be achieved by passing +// crypto.Hash(0) for opts. rand is ignored. Will only return an error +// if opts.HashFunc() is non-zero. +// +// This function is used to make PrivateKey implement the crypto.Signer +// interface. The package-level SignTo function might be more convenient +// to use. +func (sk *PrivateKey) Sign(rand io.Reader, msg []byte, opts crypto.SignerOpts) ( + sig []byte, err error) { + var ret [SignatureSize]byte + + if opts.HashFunc() != crypto.Hash(0) { + return nil, errors.New("dilithium: cannot sign hashed message") + } + SignTo(sk, msg, ret[:]) + + return ret[:], nil +} + +// Computes the public key corresponding to this private key. +// +// Returns a *PublicKey. The type crypto.PublicKey is used to make +// PrivateKey implement the crypto.Signer interface. +func (sk *PrivateKey) Public() crypto.PublicKey { + return (*PublicKey)((*internal.PrivateKey)(sk).Public()) +} + +// Equal returns whether the two private keys equal. +func (sk *PrivateKey) Equal(other crypto.PrivateKey) bool { + castOther, ok := other.(*PrivateKey) + if !ok { + return false + } + return (*internal.PrivateKey)(sk).Equal((*internal.PrivateKey)(castOther)) +} + +// Equal returns whether the two public keys equal. +func (pk *PublicKey) Equal(other crypto.PublicKey) bool { + castOther, ok := other.(*PublicKey) + if !ok { + return false + } + return (*internal.PublicKey)(pk).Equal((*internal.PublicKey)(castOther)) +} + +// Boilerplate for generic signatures API + +type scheme struct{} + +var sch sign.Scheme = &scheme{} + +// Scheme returns a generic signature interface for Dilithium2. +func Scheme() sign.Scheme { return sch } + +func (*scheme) Name() string { return "Dilithium2" } +func (*scheme) PublicKeySize() int { return PublicKeySize } +func (*scheme) PrivateKeySize() int { return PrivateKeySize } +func (*scheme) SignatureSize() int { return SignatureSize } +func (*scheme) SeedSize() int { return SeedSize } + +// TODO TLSIdentifier() + +func (*scheme) SupportsContext() bool { + return false +} + +func (*scheme) GenerateKey() (sign.PublicKey, sign.PrivateKey, error) { + return GenerateKey(nil) +} + +func (*scheme) Sign( + sk sign.PrivateKey, + msg []byte, + opts *sign.SignatureOpts, +) []byte { + sig := make([]byte, SignatureSize) + + priv, ok := sk.(*PrivateKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + panic(sign.ErrContextNotSupported) + } + SignTo(priv, msg, sig) + + return sig +} + +func (*scheme) Verify( + pk sign.PublicKey, + msg, sig []byte, + opts *sign.SignatureOpts, +) bool { + pub, ok := pk.(*PublicKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + panic(sign.ErrContextNotSupported) + } + return Verify(pub, msg, sig) +} + +func (*scheme) DeriveKey(seed []byte) (sign.PublicKey, sign.PrivateKey) { + if len(seed) != SeedSize { + panic(sign.ErrSeedSize) + } + var seed2 [SeedSize]byte + copy(seed2[:], seed) + return NewKeyFromSeed(&seed2) +} + +func (*scheme) UnmarshalBinaryPublicKey(buf []byte) (sign.PublicKey, error) { + if len(buf) != PublicKeySize { + return nil, sign.ErrPubKeySize + } + + var ( + buf2 [PublicKeySize]byte + ret PublicKey + ) + + copy(buf2[:], buf) + ret.Unpack(&buf2) + return &ret, nil +} + +func (*scheme) UnmarshalBinaryPrivateKey(buf []byte) (sign.PrivateKey, error) { + if len(buf) != PrivateKeySize { + return nil, sign.ErrPrivKeySize + } + + var ( + buf2 [PrivateKeySize]byte + ret PrivateKey + ) + + copy(buf2[:], buf) + ret.Unpack(&buf2) + return &ret, nil +} + +func (sk *PrivateKey) Scheme() sign.Scheme { + return sch +} + +func (sk *PublicKey) Scheme() sign.Scheme { + return sch +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/dilithium.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/dilithium.go new file mode 100644 index 0000000..8f1c8e5 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/dilithium.go @@ -0,0 +1,491 @@ +// Code generated from mode3/internal/dilithium.go by gen.go + +package internal + +import ( + cryptoRand "crypto/rand" + "crypto/subtle" + "io" + + "github.com/cloudflare/circl/internal/sha3" + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +const ( + // Size of a packed polynomial of norm ≤η. + // (Note that the formula is not valid in general.) + PolyLeqEtaSize = (common.N * DoubleEtaBits) / 8 + + // β = τη, the maximum size of c s₂. + Beta = Tau * Eta + + // γ₁ range of y + Gamma1 = 1 << Gamma1Bits + + // Size of packed polynomial of norm <γ₁ such as z + PolyLeGamma1Size = (Gamma1Bits + 1) * common.N / 8 + + // α = 2γ₂ parameter for decompose + Alpha = 2 * Gamma2 + + // Size of a packed private key + PrivateKeySize = 32 + 32 + TRSize + PolyLeqEtaSize*(L+K) + common.PolyT0Size*K + + // Size of a packed public key + PublicKeySize = 32 + common.PolyT1Size*K + + // Size of a packed signature + SignatureSize = L*PolyLeGamma1Size + Omega + K + CTildeSize + + // Size of packed w₁ + PolyW1Size = (common.N * (common.QBits - Gamma1Bits)) / 8 +) + +// PublicKey is the type of Dilithium public keys. +type PublicKey struct { + rho [32]byte + t1 VecK + + // Cached values + t1p [common.PolyT1Size * K]byte + A *Mat + tr *[TRSize]byte +} + +// PrivateKey is the type of Dilithium private keys. +type PrivateKey struct { + rho [32]byte + key [32]byte + s1 VecL + s2 VecK + t0 VecK + tr [TRSize]byte + + // Cached values + A Mat // ExpandA(ρ) + s1h VecL // NTT(s₁) + s2h VecK // NTT(s₂) + t0h VecK // NTT(t₀) +} + +type unpackedSignature struct { + z VecL + hint VecK + c [CTildeSize]byte +} + +// Packs the signature into buf. +func (sig *unpackedSignature) Pack(buf []byte) { + copy(buf[:], sig.c[:]) + sig.z.PackLeGamma1(buf[CTildeSize:]) + sig.hint.PackHint(buf[CTildeSize+L*PolyLeGamma1Size:]) +} + +// Sets sig to the signature encoded in the buffer. +// +// Returns whether buf contains a properly packed signature. +func (sig *unpackedSignature) Unpack(buf []byte) bool { + if len(buf) < SignatureSize { + return false + } + copy(sig.c[:], buf[:]) + sig.z.UnpackLeGamma1(buf[CTildeSize:]) + if sig.z.Exceeds(Gamma1 - Beta) { + return false + } + if !sig.hint.UnpackHint(buf[CTildeSize+L*PolyLeGamma1Size:]) { + return false + } + return true +} + +// Packs the public key into buf. +func (pk *PublicKey) Pack(buf *[PublicKeySize]byte) { + copy(buf[:32], pk.rho[:]) + copy(buf[32:], pk.t1p[:]) +} + +// Sets pk to the public key encoded in buf. +func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte) { + copy(pk.rho[:], buf[:32]) + copy(pk.t1p[:], buf[32:]) + + pk.t1.UnpackT1(pk.t1p[:]) + pk.A = new(Mat) + pk.A.Derive(&pk.rho) + + // tr = CRH(ρ ‖ t1) = CRH(pk) + pk.tr = new([TRSize]byte) + h := sha3.NewShake256() + _, _ = h.Write(buf[:]) + _, _ = h.Read(pk.tr[:]) +} + +// Packs the private key into buf. +func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte) { + copy(buf[:32], sk.rho[:]) + copy(buf[32:64], sk.key[:]) + copy(buf[64:64+TRSize], sk.tr[:]) + offset := 64 + TRSize + sk.s1.PackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * L + sk.s2.PackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * K + sk.t0.PackT0(buf[offset:]) +} + +// Sets sk to the private key encoded in buf. +func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte) { + copy(sk.rho[:], buf[:32]) + copy(sk.key[:], buf[32:64]) + copy(sk.tr[:], buf[64:64+TRSize]) + offset := 64 + TRSize + sk.s1.UnpackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * L + sk.s2.UnpackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * K + sk.t0.UnpackT0(buf[offset:]) + + // Cached values + sk.A.Derive(&sk.rho) + sk.t0h = sk.t0 + sk.t0h.NTT() + sk.s1h = sk.s1 + sk.s1h.NTT() + sk.s2h = sk.s2 + sk.s2h.NTT() +} + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error) { + var seed [32]byte + if rand == nil { + rand = cryptoRand.Reader + } + _, err := io.ReadFull(rand, seed[:]) + if err != nil { + return nil, nil, err + } + pk, sk := NewKeyFromSeed(&seed) + return pk, sk, nil +} + +// NewKeyFromSeed derives a public/private key pair using the given seed. +func NewKeyFromSeed(seed *[common.SeedSize]byte) (*PublicKey, *PrivateKey) { + var eSeed [128]byte // expanded seed + var pk PublicKey + var sk PrivateKey + var sSeed [64]byte + + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + + if NIST { + _, _ = h.Write([]byte{byte(K), byte(L)}) + } + + _, _ = h.Read(eSeed[:]) + + copy(pk.rho[:], eSeed[:32]) + copy(sSeed[:], eSeed[32:96]) + copy(sk.key[:], eSeed[96:]) + copy(sk.rho[:], pk.rho[:]) + + sk.A.Derive(&pk.rho) + + for i := uint16(0); i < L; i++ { + PolyDeriveUniformLeqEta(&sk.s1[i], &sSeed, i) + } + + for i := uint16(0); i < K; i++ { + PolyDeriveUniformLeqEta(&sk.s2[i], &sSeed, i+L) + } + + sk.s1h = sk.s1 + sk.s1h.NTT() + sk.s2h = sk.s2 + sk.s2h.NTT() + + sk.computeT0andT1(&sk.t0, &pk.t1) + + sk.t0h = sk.t0 + sk.t0h.NTT() + + // Complete public key far enough to be packed + pk.t1.PackT1(pk.t1p[:]) + pk.A = &sk.A + + // Finish private key + var packedPk [PublicKeySize]byte + pk.Pack(&packedPk) + + // tr = CRH(ρ ‖ t1) = CRH(pk) + h.Reset() + _, _ = h.Write(packedPk[:]) + _, _ = h.Read(sk.tr[:]) + + // Finish cache of public key + pk.tr = &sk.tr + + return &pk, &sk +} + +// Computes t0 and t1 from sk.s1h, sk.s2 and sk.A. +func (sk *PrivateKey) computeT0andT1(t0, t1 *VecK) { + var t VecK + + // Set t to A s₁ + s₂ + for i := 0; i < K; i++ { + PolyDotHat(&t[i], &sk.A[i], &sk.s1h) + t[i].ReduceLe2Q() + t[i].InvNTT() + } + t.Add(&t, &sk.s2) + t.Normalize() + + // Compute t₀, t₁ = Power2Round(t) + t.Power2Round(t0, t1) +} + +// Verify checks whether the given signature by pk on msg is valid. +// +// For Dilithium this is the top-level verification function. +// In ML-DSA, this is ML-DSA.Verify_internal. +func Verify(pk *PublicKey, msg func(io.Writer), signature []byte) bool { + var sig unpackedSignature + var mu [64]byte + var zh VecL + var Az, Az2dct1, w1 VecK + var ch common.Poly + var cp [CTildeSize]byte + var w1Packed [PolyW1Size * K]byte + + // Note that Unpack() checked whether ‖z‖_∞ < γ₁ - β + // and ensured that there at most ω ones in pk.hint. + if !sig.Unpack(signature) { + return false + } + + // μ = CRH(tr ‖ msg) + h := sha3.NewShake256() + _, _ = h.Write(pk.tr[:]) + msg(&h) + _, _ = h.Read(mu[:]) + + // Compute Az + zh = sig.z + zh.NTT() + + for i := 0; i < K; i++ { + PolyDotHat(&Az[i], &pk.A[i], &zh) + } + + // Next, we compute Az - 2ᵈ·c·t₁. + // Note that the coefficients of t₁ are bounded by 256 = 2⁹, + // so the coefficients of Az2dct1 will bounded by 2⁹⁺ᵈ = 2²³ < 2q, + // which is small enough for NTT(). + Az2dct1.MulBy2toD(&pk.t1) + Az2dct1.NTT() + PolyDeriveUniformBall(&ch, sig.c[:]) + ch.NTT() + for i := 0; i < K; i++ { + Az2dct1[i].MulHat(&Az2dct1[i], &ch) + } + Az2dct1.Sub(&Az, &Az2dct1) + Az2dct1.ReduceLe2Q() + Az2dct1.InvNTT() + Az2dct1.NormalizeAssumingLe2Q() + + // UseHint(pk.hint, Az - 2ᵈ·c·t₁) + // = UseHint(pk.hint, w - c·s₂ + c·t₀) + // = UseHint(pk.hint, r + c·t₀) + // = r₁ = w₁. + w1.UseHint(&Az2dct1, &sig.hint) + w1.PackW1(w1Packed[:]) + + // c' = H(μ, w₁) + h.Reset() + _, _ = h.Write(mu[:]) + _, _ = h.Write(w1Packed[:]) + _, _ = h.Read(cp[:]) + + return sig.c == cp +} + +// SignTo signs the given message and writes the signature into signature. +// +// For Dilithium this is the top-level signing function. For ML-DSA +// this is ML-DSA.Sign_internal. +// +//nolint:funlen +func SignTo(sk *PrivateKey, msg func(io.Writer), rnd [32]byte, signature []byte) { + var mu, rhop [64]byte + var w1Packed [PolyW1Size * K]byte + var y, yh VecL + var w, w0, w1, w0mcs2, ct0, w0mcs2pct0 VecK + var ch common.Poly + var yNonce uint16 + var sig unpackedSignature + + if len(signature) < SignatureSize { + panic("Signature does not fit in that byteslice") + } + + // μ = CRH(tr ‖ msg) + h := sha3.NewShake256() + _, _ = h.Write(sk.tr[:]) + msg(&h) + _, _ = h.Read(mu[:]) + + // ρ' = CRH(key ‖ μ) + h.Reset() + _, _ = h.Write(sk.key[:]) + if NIST { + _, _ = h.Write(rnd[:]) + } + _, _ = h.Write(mu[:]) + _, _ = h.Read(rhop[:]) + + // Main rejection loop + attempt := 0 + for { + attempt++ + if attempt >= 576 { + // Depending on the mode, one try has a chance between 1/7 and 1/4 + // of succeeding. Thus it is safe to say that 576 iterations + // are enough as (6/7)⁵⁷⁶ < 2⁻¹²⁸. + panic("This should only happen 1 in 2^{128}: something is wrong.") + } + + // y = ExpandMask(ρ', key) + VecLDeriveUniformLeGamma1(&y, &rhop, yNonce) + yNonce += uint16(L) + + // Set w to A y + yh = y + yh.NTT() + for i := 0; i < K; i++ { + PolyDotHat(&w[i], &sk.A[i], &yh) + w[i].ReduceLe2Q() + w[i].InvNTT() + } + + // Decompose w into w₀ and w₁ + w.NormalizeAssumingLe2Q() + w.Decompose(&w0, &w1) + + // c~ = H(μ ‖ w₁) + w1.PackW1(w1Packed[:]) + h.Reset() + _, _ = h.Write(mu[:]) + _, _ = h.Write(w1Packed[:]) + _, _ = h.Read(sig.c[:]) + + PolyDeriveUniformBall(&ch, sig.c[:]) + ch.NTT() + + // Ensure ‖ w₀ - c·s2 ‖_∞ < γ₂ - β. + // + // By Lemma 3 of the specification this is equivalent to checking that + // both ‖ r₀ ‖_∞ < γ₂ - β and r₁ = w₁, for the decomposition + // w - c·s₂ = r₁ α + r₀ as computed by decompose(). + // See also §4.1 of the specification. + for i := 0; i < K; i++ { + w0mcs2[i].MulHat(&ch, &sk.s2h[i]) + w0mcs2[i].InvNTT() + } + w0mcs2.Sub(&w0, &w0mcs2) + w0mcs2.Normalize() + + if w0mcs2.Exceeds(Gamma2 - Beta) { + continue + } + + // z = y + c·s₁ + for i := 0; i < L; i++ { + sig.z[i].MulHat(&ch, &sk.s1h[i]) + sig.z[i].InvNTT() + } + sig.z.Add(&sig.z, &y) + sig.z.Normalize() + + // Ensure ‖z‖_∞ < γ₁ - β + if sig.z.Exceeds(Gamma1 - Beta) { + continue + } + + // Compute c·t₀ + for i := 0; i < K; i++ { + ct0[i].MulHat(&ch, &sk.t0h[i]) + ct0[i].InvNTT() + } + ct0.NormalizeAssumingLe2Q() + + // Ensure ‖c·t₀‖_∞ < γ₂. + if ct0.Exceeds(Gamma2) { + continue + } + + // Create the hint to be able to reconstruct w₁ from w - c·s₂ + c·t0. + // Note that we're not using makeHint() in the obvious way as we + // do not know whether ‖ sc·s₂ - c·t₀ ‖_∞ < γ₂. Instead we note + // that our makeHint() is actually the same as a makeHint for a + // different decomposition: + // + // Earlier we ensured indirectly with a check that r₁ = w₁ where + // r = w - c·s₂. Hence r₀ = r - r₁ α = w - c·s₂ - w₁ α = w₀ - c·s₂. + // Thus MakeHint(w₀ - c·s₂ + c·t₀, w₁) = MakeHint(r0 + c·t₀, r₁) + // and UseHint(w - c·s₂ + c·t₀, w₁) = UseHint(r + c·t₀, r₁). + // As we just ensured that ‖ c·t₀ ‖_∞ < γ₂ our usage is correct. + w0mcs2pct0.Add(&w0mcs2, &ct0) + w0mcs2pct0.NormalizeAssumingLe2Q() + hintPop := sig.hint.MakeHint(&w0mcs2pct0, &w1) + if hintPop > Omega { + continue + } + + break + } + + sig.Pack(signature[:]) +} + +// Computes the public key corresponding to this private key. +func (sk *PrivateKey) Public() *PublicKey { + var t0 VecK + pk := &PublicKey{ + rho: sk.rho, + A: &sk.A, + tr: &sk.tr, + } + sk.computeT0andT1(&t0, &pk.t1) + pk.t1.PackT1(pk.t1p[:]) + return pk +} + +// Equal returns whether the two public keys are equal +func (pk *PublicKey) Equal(other *PublicKey) bool { + return pk.rho == other.rho && pk.t1 == other.t1 +} + +// Equal returns whether the two private keys are equal +func (sk *PrivateKey) Equal(other *PrivateKey) bool { + ret := (subtle.ConstantTimeCompare(sk.rho[:], other.rho[:]) & + subtle.ConstantTimeCompare(sk.key[:], other.key[:]) & + subtle.ConstantTimeCompare(sk.tr[:], other.tr[:])) + + acc := uint32(0) + for i := 0; i < L; i++ { + for j := 0; j < common.N; j++ { + acc |= sk.s1[i][j] ^ other.s1[i][j] + } + } + for i := 0; i < K; i++ { + for j := 0; j < common.N; j++ { + acc |= sk.s2[i][j] ^ other.s2[i][j] + acc |= sk.t0[i][j] ^ other.t0[i][j] + } + } + return (ret & subtle.ConstantTimeEq(int32(acc), 0)) == 1 +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/mat.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/mat.go new file mode 100644 index 0000000..ceaf634 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/mat.go @@ -0,0 +1,59 @@ +// Code generated from mode3/internal/mat.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// A k by l matrix of polynomials. +type Mat [K]VecL + +// Expands the given seed to a complete matrix. +// +// This function is called ExpandA in the specification. +func (m *Mat) Derive(seed *[32]byte) { + if !DeriveX4Available { + for i := uint16(0); i < K; i++ { + for j := uint16(0); j < L; j++ { + PolyDeriveUniform(&m[i][j], seed, (i<<8)+j) + } + } + return + } + + idx := 0 + var nonces [4]uint16 + var ps [4]*common.Poly + for i := uint16(0); i < K; i++ { + for j := uint16(0); j < L; j++ { + nonces[idx] = (i << 8) + j + ps[idx] = &m[i][j] + idx++ + if idx == 4 { + idx = 0 + PolyDeriveUniformX4(ps, seed, nonces) + } + } + } + if idx != 0 { + for i := idx; i < 4; i++ { + ps[i] = nil + } + PolyDeriveUniformX4(ps, seed, nonces) + } +} + +// Set p to the inner product of a and b using pointwise multiplication. +// +// Assumes a and b are in Montgomery form and their coefficients are +// pairwise sufficiently small to multiply, see Poly.MulHat(). Resulting +// coefficients are bounded by 2Lq. +func PolyDotHat(p *common.Poly, a, b *VecL) { + var t common.Poly + *p = common.Poly{} // zero p + for i := 0; i < L; i++ { + t.MulHat(&a[i], &b[i]) + p.Add(&t, p) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/pack.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/pack.go new file mode 100644 index 0000000..1854b41 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/pack.go @@ -0,0 +1,270 @@ +// Code generated from mode3/internal/pack.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// Writes p with norm less than or equal η into buf, which must be of +// size PolyLeqEtaSize. +// +// Assumes coefficients of p are not normalized, but in [q-η,q+η]. +func PolyPackLeqEta(p *common.Poly, buf []byte) { + if DoubleEtaBits == 4 { // compiler eliminates branch + j := 0 + for i := 0; i < PolyLeqEtaSize; i++ { + buf[i] = (byte(common.Q+Eta-p[j]) | + byte(common.Q+Eta-p[j+1])<<4) + j += 2 + } + } else if DoubleEtaBits == 3 { + j := 0 + for i := 0; i < PolyLeqEtaSize; i += 3 { + buf[i] = (byte(common.Q+Eta-p[j]) | + (byte(common.Q+Eta-p[j+1]) << 3) | + (byte(common.Q+Eta-p[j+2]) << 6)) + buf[i+1] = ((byte(common.Q+Eta-p[j+2]) >> 2) | + (byte(common.Q+Eta-p[j+3]) << 1) | + (byte(common.Q+Eta-p[j+4]) << 4) | + (byte(common.Q+Eta-p[j+5]) << 7)) + buf[i+2] = ((byte(common.Q+Eta-p[j+5]) >> 1) | + (byte(common.Q+Eta-p[j+6]) << 2) | + (byte(common.Q+Eta-p[j+7]) << 5)) + j += 8 + } + } else { + panic("eta not supported") + } +} + +// Sets p to the polynomial of norm less than or equal η encoded in the +// given buffer of size PolyLeqEtaSize. +// +// Output coefficients of p are not normalized, but in [q-η,q+η] provided +// buf was created using PackLeqEta. +// +// Beware, for arbitrary buf the coefficients of p might end up in +// the interval [q-2^b,q+2^b] where b is the least b with η≤2^b. +func PolyUnpackLeqEta(p *common.Poly, buf []byte) { + if DoubleEtaBits == 4 { // compiler eliminates branch + j := 0 + for i := 0; i < PolyLeqEtaSize; i++ { + p[j] = common.Q + Eta - uint32(buf[i]&15) + p[j+1] = common.Q + Eta - uint32(buf[i]>>4) + j += 2 + } + } else if DoubleEtaBits == 3 { + j := 0 + for i := 0; i < PolyLeqEtaSize; i += 3 { + p[j] = common.Q + Eta - uint32(buf[i]&7) + p[j+1] = common.Q + Eta - uint32((buf[i]>>3)&7) + p[j+2] = common.Q + Eta - uint32((buf[i]>>6)|((buf[i+1]<<2)&7)) + p[j+3] = common.Q + Eta - uint32((buf[i+1]>>1)&7) + p[j+4] = common.Q + Eta - uint32((buf[i+1]>>4)&7) + p[j+5] = common.Q + Eta - uint32((buf[i+1]>>7)|((buf[i+2]<<1)&7)) + p[j+6] = common.Q + Eta - uint32((buf[i+2]>>2)&7) + p[j+7] = common.Q + Eta - uint32((buf[i+2]>>5)&7) + j += 8 + } + } else { + panic("eta not supported") + } +} + +// Writes v with coefficients in {0, 1} of which at most ω non-zero +// to buf, which must have length ω+k. +func (v *VecK) PackHint(buf []byte) { + // The packed hint starts with the indices of the non-zero coefficients + // For instance: + // + // (x⁵⁶ + x¹⁰⁰, x²⁵⁵, 0, x² + x²³, x¹) + // + // Yields + // + // 56, 100, 255, 2, 23, 1 + // + // Then we pad with zeroes until we have a list of ω items: + // // 56, 100, 255, 2, 23, 1, 0, 0, ..., 0 + // + // Then we finish with a list of the switch-over-indices in this + // list between polynomials, so: + // + // 56, 100, 255, 2, 23, 1, 0, 0, ..., 0, 2, 3, 3, 5, 6 + + off := uint8(0) + for i := 0; i < K; i++ { + for j := uint16(0); j < common.N; j++ { + if v[i][j] != 0 { + buf[off] = uint8(j) + off++ + } + } + buf[Omega+i] = off + } + for ; off < Omega; off++ { + buf[off] = 0 + } +} + +// Sets v to the vector encoded using VecK.PackHint() +// +// Returns whether unpacking was successful. +func (v *VecK) UnpackHint(buf []byte) bool { + // A priori, there would be several reasonable ways to encode the same + // hint vector. We take care to only allow only one encoding, to ensure + // "strong unforgeability". + // + // See PackHint() source for description of the encoding. + *v = VecK{} // zero v + prevSOP := uint8(0) // previous switch-over-point + for i := 0; i < K; i++ { + SOP := buf[Omega+i] + if SOP < prevSOP || SOP > Omega { + return false // ensures switch-over-points are increasing + } + for j := prevSOP; j < SOP; j++ { + if j > prevSOP && buf[j] <= buf[j-1] { + return false // ensures indices are increasing (within a poly) + } + v[i][buf[j]] = 1 + } + prevSOP = SOP + } + for j := prevSOP; j < Omega; j++ { + if buf[j] != 0 { + return false // ensures padding indices are zero + } + } + + return true +} + +// Sets p to the polynomial packed into buf by PolyPackLeGamma1. +// +// p will be normalized. +func PolyUnpackLeGamma1(p *common.Poly, buf []byte) { + if Gamma1Bits == 17 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 9 { + p0 := uint32(buf[i]) | (uint32(buf[i+1]) << 8) | + (uint32(buf[i+2]&0x3) << 16) + p1 := uint32(buf[i+2]>>2) | (uint32(buf[i+3]) << 6) | + (uint32(buf[i+4]&0xf) << 14) + p2 := uint32(buf[i+4]>>4) | (uint32(buf[i+5]) << 4) | + (uint32(buf[i+6]&0x3f) << 12) + p3 := uint32(buf[i+6]>>6) | (uint32(buf[i+7]) << 2) | + (uint32(buf[i+8]) << 10) + + // coefficients in [0,…,2γ₁) + p0 = Gamma1 - p0 // (-γ₁,…,γ₁] + p1 = Gamma1 - p1 + p2 = Gamma1 - p2 + p3 = Gamma1 - p3 + + p0 += uint32(int32(p0)>>31) & common.Q // normalize + p1 += uint32(int32(p1)>>31) & common.Q + p2 += uint32(int32(p2)>>31) & common.Q + p3 += uint32(int32(p3)>>31) & common.Q + + p[j] = p0 + p[j+1] = p1 + p[j+2] = p2 + p[j+3] = p3 + + j += 4 + } + } else if Gamma1Bits == 19 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 5 { + p0 := uint32(buf[i]) | (uint32(buf[i+1]) << 8) | + (uint32(buf[i+2]&0xf) << 16) + p1 := uint32(buf[i+2]>>4) | (uint32(buf[i+3]) << 4) | + (uint32(buf[i+4]) << 12) + + p0 = Gamma1 - p0 + p1 = Gamma1 - p1 + + p0 += uint32(int32(p0)>>31) & common.Q + p1 += uint32(int32(p1)>>31) & common.Q + + p[j] = p0 + p[j+1] = p1 + + j += 2 + } + } else { + panic("γ₁ not supported") + } +} + +// Writes p whose coefficients are in (-γ₁,γ₁] into buf +// which has to be of length PolyLeGamma1Size. +// +// Assumes p is normalized. +func PolyPackLeGamma1(p *common.Poly, buf []byte) { + if Gamma1Bits == 17 { + j := 0 + // coefficients in [0,…,γ₁] ∪ (q-γ₁,…,q) + for i := 0; i < PolyLeGamma1Size; i += 9 { + p0 := Gamma1 - p[j] // [0,…,γ₁] ∪ (γ₁-q,…,2γ₁-q) + p0 += uint32(int32(p0)>>31) & common.Q // [0,…,2γ₁) + p1 := Gamma1 - p[j+1] + p1 += uint32(int32(p1)>>31) & common.Q + p2 := Gamma1 - p[j+2] + p2 += uint32(int32(p2)>>31) & common.Q + p3 := Gamma1 - p[j+3] + p3 += uint32(int32(p3)>>31) & common.Q + + buf[i+0] = byte(p0) + buf[i+1] = byte(p0 >> 8) + buf[i+2] = byte(p0>>16) | byte(p1<<2) + buf[i+3] = byte(p1 >> 6) + buf[i+4] = byte(p1>>14) | byte(p2<<4) + buf[i+5] = byte(p2 >> 4) + buf[i+6] = byte(p2>>12) | byte(p3<<6) + buf[i+7] = byte(p3 >> 2) + buf[i+8] = byte(p3 >> 10) + + j += 4 + } + } else if Gamma1Bits == 19 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 5 { + // Coefficients are in [0, γ₁] ∪ (Q-γ₁, Q) + p0 := Gamma1 - p[j] + p0 += uint32(int32(p0)>>31) & common.Q + p1 := Gamma1 - p[j+1] + p1 += uint32(int32(p1)>>31) & common.Q + + buf[i+0] = byte(p0) + buf[i+1] = byte(p0 >> 8) + buf[i+2] = byte(p0>>16) | byte(p1<<4) + buf[i+3] = byte(p1 >> 4) + buf[i+4] = byte(p1 >> 12) + + j += 2 + } + } else { + panic("γ₁ not supported") + } +} + +// Pack w₁ into buf, which must be of length PolyW1Size. +// +// Assumes w₁ is normalized. +func PolyPackW1(p *common.Poly, buf []byte) { + if Gamma1Bits == 19 { + p.PackLe16(buf) + } else if Gamma1Bits == 17 { + j := 0 + for i := 0; i < PolyW1Size; i += 3 { + buf[i] = byte(p[j]) | byte(p[j+1]<<6) + buf[i+1] = byte(p[j+1]>>2) | byte(p[j+2]<<4) + buf[i+2] = byte(p[j+2]>>4) | byte(p[j+3]<<2) + j += 4 + } + } else { + panic("unsupported γ₁") + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/params.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/params.go new file mode 100644 index 0000000..c3341f6 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/params.go @@ -0,0 +1,18 @@ +// Code generated from params.templ.go. DO NOT EDIT. + +package internal + +const ( + Name = "Dilithium2" + K = 4 + L = 4 + Eta = 2 + DoubleEtaBits = 3 + Omega = 80 + Tau = 39 + Gamma1Bits = 17 + Gamma2 = 95232 + NIST = false + TRSize = 32 + CTildeSize = 32 +) diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/rounding.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/rounding.go new file mode 100644 index 0000000..58123c0 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/rounding.go @@ -0,0 +1,142 @@ +// Code generated from mode3/internal/rounding.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// Splits 0 ≤ a < q into a₀ and a₁ with a = a₁*α + a₀ with -α/2 < a₀ ≤ α/2, +// except for when we would have a₁ = (q-1)/α in which case a₁=0 is taken +// and -α/2 ≤ a₀ < 0. Returns a₀ + q. Note 0 ≤ a₁ < (q-1)/α. +// Recall α = 2γ₂. +func decompose(a uint32) (a0plusQ, a1 uint32) { + // a₁ = ⌈a / 128⌉ + a1 = (a + 127) >> 7 + + if Alpha == 523776 { + // 1025/2²² is close enough to 1/4092 so that a₁ + // becomes a/α rounded down. + a1 = ((a1*1025 + (1 << 21)) >> 22) + + // For the corner-case a₁ = (q-1)/α = 16, we have to set a₁=0. + a1 &= 15 + } else if Alpha == 190464 { + // 1488/2²⁴ is close enough to 1/1488 so that a₁ + // becomes a/α rounded down. + a1 = ((a1 * 11275) + (1 << 23)) >> 24 + + // For the corner-case a₁ = (q-1)/α = 44, we have to set a₁=0. + a1 ^= uint32(int32(43-a1)>>31) & a1 + } else { + panic("unsupported α") + } + + a0plusQ = a - a1*Alpha + + // In the corner-case, when we set a₁=0, we will incorrectly + // have a₀ > (q-1)/2 and we'll need to subtract q. As we + // return a₀ + q, that comes down to adding q if a₀ < (q-1)/2. + a0plusQ += uint32(int32(a0plusQ-(common.Q-1)/2)>>31) & common.Q + + return +} + +// Assume 0 ≤ r, f < Q with ‖f‖_∞ ≤ α/2. Decompose r as r = r1*α + r0 as +// computed by decompose(). Write r' := r - f (mod Q). Now, decompose +// r'=r-f again as r' = r'1*α + r'0 using decompose(). As f is small, we +// have r'1 = r1 + h, where h ∈ {-1, 0, 1}. makeHint() computes |h| +// given z0 := r0 - f (mod Q) and r1. With |h|, which is called the hint, +// we can reconstruct r1 using only r' = r - f, which is done by useHint(). +// To wit: +// +// useHint( r - f, makeHint( r0 - f, r1 ) ) = r1. +// +// Assumes 0 ≤ z0 < Q. +func makeHint(z0, r1 uint32) uint32 { + // If -α/2 < r0 - f ≤ α/2, then r1*α + r0 - f is a valid decomposition of r' + // with the restrictions of decompose() and so r'1 = r1. So the hint + // should be 0. This is covered by the first two inequalities. + // There is one other case: if r0 - f = -α/2, then r1*α + r0 - f is also + // a valid decomposition if r1 = 0. In the other cases a one is carried + // and the hint should be 1. + if z0 <= Gamma2 || z0 > common.Q-Gamma2 || (z0 == common.Q-Gamma2 && r1 == 0) { + return 0 + } + return 1 +} + +// Uses the hint created by makeHint() to reconstruct r1 from r'=r-f; see +// documentation of makeHint() for context. +// Assumes 0 ≤ r' < Q. +func useHint(rp uint32, hint uint32) uint32 { + rp0plusQ, rp1 := decompose(rp) + if hint == 0 { + return rp1 + } + if rp0plusQ > common.Q { + return (rp1 + 1) & 15 + } + return (rp1 - 1) & 15 +} + +// Sets p to the hint polynomial for p0 the modified low bits and p1 +// the unmodified high bits --- see makeHint(). +// +// Returns the number of ones in the hint polynomial. +func PolyMakeHint(p, p0, p1 *common.Poly) (pop uint32) { + for i := 0; i < common.N; i++ { + h := makeHint(p0[i], p1[i]) + pop += h + p[i] = h + } + return +} + +// Computes corrections to the high bits of the polynomial q according +// to the hints in h and sets p to the corrected high bits. Returns p. +func PolyUseHint(p, q, hint *common.Poly) { + var q0PlusQ common.Poly + + // See useHint() and makeHint() for an explanation. We reimplement it + // here so that we can call Poly.Decompose(), which might be way faster + // than calling decompose() in a loop (for instance when having AVX2.) + + PolyDecompose(q, &q0PlusQ, p) + + for i := 0; i < common.N; i++ { + if hint[i] == 0 { + continue + } + if Gamma2 == 261888 { + if q0PlusQ[i] > common.Q { + p[i] = (p[i] + 1) & 15 + } else { + p[i] = (p[i] - 1) & 15 + } + } else if Gamma2 == 95232 { + if q0PlusQ[i] > common.Q { + if p[i] == 43 { + p[i] = 0 + } else { + p[i]++ + } + } else { + if p[i] == 0 { + p[i] = 43 + } else { + p[i]-- + } + } + } else { + panic("unsupported γ₂") + } + } +} + +// Splits each of the coefficients of p using decompose. +func PolyDecompose(p, p0PlusQ, p1 *common.Poly) { + for i := 0; i < common.N; i++ { + p0PlusQ[i], p1[i] = decompose(p[i]) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/sample.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/sample.go new file mode 100644 index 0000000..b37370a --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/sample.go @@ -0,0 +1,339 @@ +// Code generated from mode3/internal/sample.go by gen.go + +package internal + +import ( + "encoding/binary" + + "github.com/cloudflare/circl/internal/sha3" + common "github.com/cloudflare/circl/sign/internal/dilithium" + "github.com/cloudflare/circl/simd/keccakf1600" +) + +// DeriveX4Available indicates whether the system supports the quick fourway +// sampling variants like PolyDeriveUniformX4. +var DeriveX4Available = keccakf1600.IsEnabledX4() + +// For each i, sample ps[i] uniformly from the given seed and nonces[i]. +// ps[i] may be nil and is ignored in that case. +// +// Can only be called when DeriveX4Available is true. +func PolyDeriveUniformX4(ps [4]*common.Poly, seed *[32]byte, nonces [4]uint16) { + var perm keccakf1600.StateX4 + state := perm.Initialize(false) + + // Absorb the seed in the four states + for i := 0; i < 4; i++ { + v := binary.LittleEndian.Uint64(seed[8*i : 8*(i+1)]) + for j := 0; j < 4; j++ { + state[i*4+j] = v + } + } + + // Absorb the nonces, the SHAKE128 domain separator (0b1111), the + // start of the padding (0b...001) and the end of the padding 0b100... + // Recall that the rate of SHAKE128 is 168 --- i.e. 21 uint64s. + for j := 0; j < 4; j++ { + state[4*4+j] = uint64(nonces[j]) | (0x1f << 16) + state[20*4+j] = 0x80 << 56 + } + + var idx [4]int // indices into ps + for j := 0; j < 4; j++ { + if ps[j] == nil { + idx[j] = common.N // mark nil polynomial as completed + } + } + + done := false + for !done { + // Applies KeccaK-f[1600] to state to get the next 21 uint64s of each + // of the four SHAKE128 streams. + perm.Permute() + + done = true + + PolyLoop: + for j := 0; j < 4; j++ { + if idx[j] == common.N { + continue + } + for i := 0; i < 7; i++ { + var t [8]uint32 + t[0] = uint32(state[i*3*4+j] & 0x7fffff) + t[1] = uint32((state[i*3*4+j] >> 24) & 0x7fffff) + t[2] = uint32((state[i*3*4+j] >> 48) | + ((state[(i*3+1)*4+j] & 0x7f) << 16)) + t[3] = uint32((state[(i*3+1)*4+j] >> 8) & 0x7fffff) + t[4] = uint32((state[(i*3+1)*4+j] >> 32) & 0x7fffff) + t[5] = uint32((state[(i*3+1)*4+j] >> 56) | + ((state[(i*3+2)*4+j] & 0x7fff) << 8)) + t[6] = uint32((state[(i*3+2)*4+j] >> 16) & 0x7fffff) + t[7] = uint32((state[(i*3+2)*4+j] >> 40) & 0x7fffff) + + for k := 0; k < 8; k++ { + if t[k] < common.Q { + ps[j][idx[j]] = t[k] + idx[j]++ + if idx[j] == common.N { + continue PolyLoop + } + } + } + } + done = false + } + } +} + +// Sample p uniformly from the given seed and nonce. +// +// p will be normalized. +func PolyDeriveUniform(p *common.Poly, seed *[32]byte, nonce uint16) { + var i, length int + var buf [12 * 16]byte // fits 168B SHAKE-128 rate + + length = 168 + + sample := func() { + // Note that 3 divides into 168 and 12*16, so we use up buf completely. + for j := 0; j < length && i < common.N; j += 3 { + t := (uint32(buf[j]) | (uint32(buf[j+1]) << 8) | + (uint32(buf[j+2]) << 16)) & 0x7fffff + + // We use rejection sampling + if t < common.Q { + p[i] = t + i++ + } + } + } + + var iv [32 + 2]byte // 32 byte seed + uint16 nonce + h := sha3.NewShake128() + copy(iv[:32], seed[:]) + iv[32] = uint8(nonce) + iv[33] = uint8(nonce >> 8) + _, _ = h.Write(iv[:]) + + for i < common.N { + _, _ = h.Read(buf[:168]) + sample() + } +} + +// Sample p uniformly with coefficients of norm less than or equal η, +// using the given seed and nonce. +// +// p will not be normalized, but will have coefficients in [q-η,q+η]. +func PolyDeriveUniformLeqEta(p *common.Poly, seed *[64]byte, nonce uint16) { + // Assumes 2 < η < 8. + var i, length int + var buf [9 * 16]byte // fits 136B SHAKE-256 rate + + length = 136 + + sample := func() { + // We use rejection sampling + for j := 0; j < length && i < common.N; j++ { + t1 := uint32(buf[j]) & 15 + t2 := uint32(buf[j]) >> 4 + if Eta == 2 { // branch is eliminated by compiler + if t1 <= 14 { + t1 -= ((205 * t1) >> 10) * 5 // reduce mod 5 + p[i] = common.Q + Eta - t1 + i++ + } + if t2 <= 14 && i < common.N { + t2 -= ((205 * t2) >> 10) * 5 // reduce mod 5 + p[i] = common.Q + Eta - t2 + i++ + } + } else if Eta == 4 { + if t1 <= 2*Eta { + p[i] = common.Q + Eta - t1 + i++ + } + if t2 <= 2*Eta && i < common.N { + p[i] = common.Q + Eta - t2 + i++ + } + } else { + panic("unsupported η") + } + } + } + + var iv [64 + 2]byte // 64 byte seed + uint16 nonce + + h := sha3.NewShake256() + copy(iv[:64], seed[:]) + iv[64] = uint8(nonce) + iv[65] = uint8(nonce >> 8) + + // 136 is SHAKE-256 rate + _, _ = h.Write(iv[:]) + + for i < common.N { + _, _ = h.Read(buf[:136]) + sample() + } +} + +// Sample v[i] uniformly with coefficients in (-γ₁,…,γ₁] using the +// given seed and nonce+i +// +// p will be normalized. +func VecLDeriveUniformLeGamma1(v *VecL, seed *[64]byte, nonce uint16) { + for i := 0; i < L; i++ { + PolyDeriveUniformLeGamma1(&v[i], seed, nonce+uint16(i)) + } +} + +// Sample p uniformly with coefficients in (-γ₁,…,γK1s] using the +// given seed and nonce. +// +// p will be normalized. +func PolyDeriveUniformLeGamma1(p *common.Poly, seed *[64]byte, nonce uint16) { + var buf [PolyLeGamma1Size]byte + + var iv [66]byte + h := sha3.NewShake256() + copy(iv[:64], seed[:]) + iv[64] = uint8(nonce) + iv[65] = uint8(nonce >> 8) + _, _ = h.Write(iv[:]) + _, _ = h.Read(buf[:]) + + PolyUnpackLeGamma1(p, buf[:]) +} + +// For each i, sample ps[i] uniformly with τ non-zero coefficients in {q-1,1} +// using the given seed and w1[i]. ps[i] may be nil and is ignored +// in that case. ps[i] will be normalized. +// +// Can only be called when DeriveX4Available is true. +// +// This function is currently not used (yet). +func PolyDeriveUniformBallX4(ps [4]*common.Poly, seed []byte) { + var perm keccakf1600.StateX4 + state := perm.Initialize(false) + + // Absorb the seed in the four states + for i := 0; i < CTildeSize/8; i++ { + v := binary.LittleEndian.Uint64(seed[8*i : 8*(i+1)]) + for j := 0; j < 4; j++ { + state[i*4+j] = v + } + } + + // SHAKE256 domain separator and padding + for j := 0; j < 4; j++ { + state[(CTildeSize/8)*4+j] ^= 0x1f + state[16*4+j] ^= 0x80 << 56 + } + perm.Permute() + + var signs [4]uint64 + var idx [4]uint16 // indices into ps + + for j := 0; j < 4; j++ { + if ps[j] != nil { + signs[j] = state[j] + *ps[j] = common.Poly{} // zero ps[j] + idx[j] = common.N - Tau + } else { + idx[j] = common.N // mark as completed + } + } + + stateOffset := 1 + for { + done := true + + PolyLoop: + for j := 0; j < 4; j++ { + if idx[j] == common.N { + continue + } + + for i := stateOffset; i < 17; i++ { + var bs [8]byte + binary.LittleEndian.PutUint64(bs[:], state[4*i+j]) + for k := 0; k < 8; k++ { + b := uint16(bs[k]) + + if b > idx[j] { + continue + } + + ps[j][idx[j]] = ps[j][b] + ps[j][b] = 1 + // Takes least significant bit of signs and uses it for the sign. + // Note 1 ^ (1 | (Q-1)) = Q-1. + ps[j][b] ^= uint32((-(signs[j] & 1)) & (1 | (common.Q - 1))) + signs[j] >>= 1 + + idx[j]++ + if idx[j] == common.N { + continue PolyLoop + } + } + } + + done = false + } + + if done { + break + } + + perm.Permute() + stateOffset = 0 + } +} + +// Samples p uniformly with τ non-zero coefficients in {q-1,1}. +// +// The polynomial p will be normalized. +func PolyDeriveUniformBall(p *common.Poly, seed []byte) { + var buf [136]byte // SHAKE-256 rate is 136 + + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + _, _ = h.Read(buf[:]) + + // Essentially we generate a sequence of τ ones or minus ones, + // prepend 196 zeroes and shuffle the concatenation using the + // usual algorithm (Fisher--Yates.) + signs := binary.LittleEndian.Uint64(buf[:]) + bufOff := 8 // offset into buf + + *p = common.Poly{} // zero p + for i := uint16(common.N - Tau); i < common.N; i++ { + var b uint16 + + // Find location of where to move the new coefficient to using + // rejection sampling. + for { + if bufOff >= 136 { + _, _ = h.Read(buf[:]) + bufOff = 0 + } + + b = uint16(buf[bufOff]) + bufOff++ + + if b <= i { + break + } + } + + p[i] = p[b] + p[b] = 1 + // Takes least significant bit of signs and uses it for the sign. + // Note 1 ^ (1 | (Q-1)) = Q-1. + p[b] ^= uint32((-(signs & 1)) & (1 | (common.Q - 1))) + signs >>= 1 + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/vec.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/vec.go new file mode 100644 index 0000000..d07d3b2 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode2/internal/vec.go @@ -0,0 +1,281 @@ +// Code generated from mode3/internal/vec.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// A vector of L polynomials. +type VecL [L]common.Poly + +// A vector of K polynomials. +type VecK [K]common.Poly + +// Normalize the polynomials in this vector. +func (v *VecL) Normalize() { + for i := 0; i < L; i++ { + v[i].Normalize() + } +} + +// Normalize the polynomials in this vector assuming their coefficients +// are already bounded by 2q. +func (v *VecL) NormalizeAssumingLe2Q() { + for i := 0; i < L; i++ { + v[i].NormalizeAssumingLe2Q() + } +} + +// Sets v to w + u. Does not normalize. +func (v *VecL) Add(w, u *VecL) { + for i := 0; i < L; i++ { + v[i].Add(&w[i], &u[i]) + } +} + +// Applies NTT componentwise. See Poly.NTT() for details. +func (v *VecL) NTT() { + for i := 0; i < L; i++ { + v[i].NTT() + } +} + +// Checks whether any of the coefficients exceeds the given bound in supnorm +// +// Requires the vector to be normalized. +func (v *VecL) Exceeds(bound uint32) bool { + for i := 0; i < L; i++ { + if v[i].Exceeds(bound) { + return true + } + } + return false +} + +// Applies Poly.Power2Round componentwise. +// +// Requires the vector to be normalized. +func (v *VecL) Power2Round(v0PlusQ, v1 *VecL) { + for i := 0; i < L; i++ { + v[i].Power2Round(&v0PlusQ[i], &v1[i]) + } +} + +// Applies Poly.Decompose componentwise. +// +// Requires the vector to be normalized. +func (v *VecL) Decompose(v0PlusQ, v1 *VecL) { + for i := 0; i < L; i++ { + PolyDecompose(&v[i], &v0PlusQ[i], &v1[i]) + } +} + +// Sequentially packs each polynomial using Poly.PackLeqEta(). +func (v *VecL) PackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyPackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sets v to the polynomials packed in buf using VecL.PackLeqEta(). +func (v *VecL) UnpackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyUnpackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sequentially packs each polynomial using PolyPackLeGamma1(). +func (v *VecL) PackLeGamma1(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyPackLeGamma1(&v[i], buf[offset:]) + offset += PolyLeGamma1Size + } +} + +// Sets v to the polynomials packed in buf using VecL.PackLeGamma1(). +func (v *VecL) UnpackLeGamma1(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyUnpackLeGamma1(&v[i], buf[offset:]) + offset += PolyLeGamma1Size + } +} + +// Normalize the polynomials in this vector. +func (v *VecK) Normalize() { + for i := 0; i < K; i++ { + v[i].Normalize() + } +} + +// Normalize the polynomials in this vector assuming their coefficients +// are already bounded by 2q. +func (v *VecK) NormalizeAssumingLe2Q() { + for i := 0; i < K; i++ { + v[i].NormalizeAssumingLe2Q() + } +} + +// Sets v to w + u. Does not normalize. +func (v *VecK) Add(w, u *VecK) { + for i := 0; i < K; i++ { + v[i].Add(&w[i], &u[i]) + } +} + +// Checks whether any of the coefficients exceeds the given bound in supnorm +// +// Requires the vector to be normalized. +func (v *VecK) Exceeds(bound uint32) bool { + for i := 0; i < K; i++ { + if v[i].Exceeds(bound) { + return true + } + } + return false +} + +// Applies Poly.Power2Round componentwise. +// +// Requires the vector to be normalized. +func (v *VecK) Power2Round(v0PlusQ, v1 *VecK) { + for i := 0; i < K; i++ { + v[i].Power2Round(&v0PlusQ[i], &v1[i]) + } +} + +// Applies Poly.Decompose componentwise. +// +// Requires the vector to be normalized. +func (v *VecK) Decompose(v0PlusQ, v1 *VecK) { + for i := 0; i < K; i++ { + PolyDecompose(&v[i], &v0PlusQ[i], &v1[i]) + } +} + +// Sets v to the hint vector for v0 the modified low bits and v1 +// the unmodified high bits --- see makeHint(). +// +// Returns the number of ones in the hint vector. +func (v *VecK) MakeHint(v0, v1 *VecK) (pop uint32) { + for i := 0; i < K; i++ { + pop += PolyMakeHint(&v[i], &v0[i], &v1[i]) + } + return +} + +// Computes corrections to the high bits of the polynomials in the vector +// w using the hints in h and sets v to the corrected high bits. Returns v. +// See useHint(). +func (v *VecK) UseHint(q, hint *VecK) *VecK { + for i := 0; i < K; i++ { + PolyUseHint(&v[i], &q[i], &hint[i]) + } + return v +} + +// Sequentially packs each polynomial using Poly.PackT1(). +func (v *VecK) PackT1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].PackT1(buf[offset:]) + offset += common.PolyT1Size + } +} + +// Sets v to the vector packed into buf by PackT1(). +func (v *VecK) UnpackT1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].UnpackT1(buf[offset:]) + offset += common.PolyT1Size + } +} + +// Sequentially packs each polynomial using Poly.PackT0(). +func (v *VecK) PackT0(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].PackT0(buf[offset:]) + offset += common.PolyT0Size + } +} + +// Sets v to the vector packed into buf by PackT0(). +func (v *VecK) UnpackT0(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].UnpackT0(buf[offset:]) + offset += common.PolyT0Size + } +} + +// Sequentially packs each polynomial using Poly.PackLeqEta(). +func (v *VecK) PackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyPackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sets v to the polynomials packed in buf using VecK.PackLeqEta(). +func (v *VecK) UnpackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyUnpackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Applies NTT componentwise. See Poly.NTT() for details. +func (v *VecK) NTT() { + for i := 0; i < K; i++ { + v[i].NTT() + } +} + +// Sequentially packs each polynomial using PolyPackW1(). +func (v *VecK) PackW1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyPackW1(&v[i], buf[offset:]) + offset += PolyW1Size + } +} + +// Sets v to a - b. +// +// Warning: assumes coefficients of the polynomials of b are less than 2q. +func (v *VecK) Sub(a, b *VecK) { + for i := 0; i < K; i++ { + v[i].Sub(&a[i], &b[i]) + } +} + +// Sets v to 2ᵈ w without reducing. +func (v *VecK) MulBy2toD(w *VecK) { + for i := 0; i < K; i++ { + v[i].MulBy2toD(&w[i]) + } +} + +// Applies InvNTT componentwise. See Poly.InvNTT() for details. +func (v *VecK) InvNTT() { + for i := 0; i < K; i++ { + v[i].InvNTT() + } +} + +// Applies Poly.ReduceLe2Q() componentwise. +func (v *VecK) ReduceLe2Q() { + for i := 0; i < K; i++ { + v[i].ReduceLe2Q() + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/dilithium.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/dilithium.go new file mode 100644 index 0000000..5a33561 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/dilithium.go @@ -0,0 +1,295 @@ +// Code generated from pkg.templ.go. DO NOT EDIT. + +// mode3 implements the CRYSTALS-Dilithium signature scheme Dilithium3 +// as submitted to round3 of the NIST PQC competition and described in +// +// https://pq-crystals.org/dilithium/data/dilithium-specification-round3-20210208.pdf +package mode3 + +import ( + "crypto" + "errors" + "io" + + "github.com/cloudflare/circl/sign" + "github.com/cloudflare/circl/sign/dilithium/mode3/internal" + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +const ( + // Size of seed for NewKeyFromSeed + SeedSize = common.SeedSize + + // Size of a packed PublicKey + PublicKeySize = internal.PublicKeySize + + // Size of a packed PrivateKey + PrivateKeySize = internal.PrivateKeySize + + // Size of a signature + SignatureSize = internal.SignatureSize +) + +// PublicKey is the type of Dilithium3 public key +type PublicKey internal.PublicKey + +// PrivateKey is the type of Dilithium3 private key +type PrivateKey internal.PrivateKey + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error) { + pk, sk, err := internal.GenerateKey(rand) + return (*PublicKey)(pk), (*PrivateKey)(sk), err +} + +// NewKeyFromSeed derives a public/private key pair using the given seed. +func NewKeyFromSeed(seed *[SeedSize]byte) (*PublicKey, *PrivateKey) { + pk, sk := internal.NewKeyFromSeed(seed) + return (*PublicKey)(pk), (*PrivateKey)(sk) +} + +// SignTo signs the given message and writes the signature into signature. +// It will panic if signature is not of length at least SignatureSize. +func SignTo(sk *PrivateKey, msg, sig []byte) { + var rnd [32]byte + + internal.SignTo( + (*internal.PrivateKey)(sk), + func(w io.Writer) { + w.Write(msg) + }, + rnd, + sig, + ) +} + +// Verify checks whether the given signature by pk on msg is valid. +func Verify(pk *PublicKey, msg, sig []byte) bool { + return internal.Verify( + (*internal.PublicKey)(pk), + func(w io.Writer) { + _, _ = w.Write(msg) + }, + sig, + ) +} + +// Sets pk to the public key encoded in buf. +func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte) { + (*internal.PublicKey)(pk).Unpack(buf) +} + +// Sets sk to the private key encoded in buf. +func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte) { + (*internal.PrivateKey)(sk).Unpack(buf) +} + +// Packs the public key into buf. +func (pk *PublicKey) Pack(buf *[PublicKeySize]byte) { + (*internal.PublicKey)(pk).Pack(buf) +} + +// Packs the private key into buf. +func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte) { + (*internal.PrivateKey)(sk).Pack(buf) +} + +// Packs the public key. +func (pk *PublicKey) Bytes() []byte { + var buf [PublicKeySize]byte + pk.Pack(&buf) + return buf[:] +} + +// Packs the private key. +func (sk *PrivateKey) Bytes() []byte { + var buf [PrivateKeySize]byte + sk.Pack(&buf) + return buf[:] +} + +// Packs the public key. +func (pk *PublicKey) MarshalBinary() ([]byte, error) { + return pk.Bytes(), nil +} + +// Packs the private key. +func (sk *PrivateKey) MarshalBinary() ([]byte, error) { + return sk.Bytes(), nil +} + +// Unpacks the public key from data. +func (pk *PublicKey) UnmarshalBinary(data []byte) error { + if len(data) != PublicKeySize { + return errors.New("packed public key must be of mode3.PublicKeySize bytes") + } + var buf [PublicKeySize]byte + copy(buf[:], data) + pk.Unpack(&buf) + return nil +} + +// Unpacks the private key from data. +func (sk *PrivateKey) UnmarshalBinary(data []byte) error { + if len(data) != PrivateKeySize { + return errors.New("packed private key must be of mode3.PrivateKeySize bytes") + } + var buf [PrivateKeySize]byte + copy(buf[:], data) + sk.Unpack(&buf) + return nil +} + +// Sign signs the given message. +// +// opts.HashFunc() must return zero, which can be achieved by passing +// crypto.Hash(0) for opts. rand is ignored. Will only return an error +// if opts.HashFunc() is non-zero. +// +// This function is used to make PrivateKey implement the crypto.Signer +// interface. The package-level SignTo function might be more convenient +// to use. +func (sk *PrivateKey) Sign(rand io.Reader, msg []byte, opts crypto.SignerOpts) ( + sig []byte, err error) { + var ret [SignatureSize]byte + + if opts.HashFunc() != crypto.Hash(0) { + return nil, errors.New("dilithium: cannot sign hashed message") + } + SignTo(sk, msg, ret[:]) + + return ret[:], nil +} + +// Computes the public key corresponding to this private key. +// +// Returns a *PublicKey. The type crypto.PublicKey is used to make +// PrivateKey implement the crypto.Signer interface. +func (sk *PrivateKey) Public() crypto.PublicKey { + return (*PublicKey)((*internal.PrivateKey)(sk).Public()) +} + +// Equal returns whether the two private keys equal. +func (sk *PrivateKey) Equal(other crypto.PrivateKey) bool { + castOther, ok := other.(*PrivateKey) + if !ok { + return false + } + return (*internal.PrivateKey)(sk).Equal((*internal.PrivateKey)(castOther)) +} + +// Equal returns whether the two public keys equal. +func (pk *PublicKey) Equal(other crypto.PublicKey) bool { + castOther, ok := other.(*PublicKey) + if !ok { + return false + } + return (*internal.PublicKey)(pk).Equal((*internal.PublicKey)(castOther)) +} + +// Boilerplate for generic signatures API + +type scheme struct{} + +var sch sign.Scheme = &scheme{} + +// Scheme returns a generic signature interface for Dilithium3. +func Scheme() sign.Scheme { return sch } + +func (*scheme) Name() string { return "Dilithium3" } +func (*scheme) PublicKeySize() int { return PublicKeySize } +func (*scheme) PrivateKeySize() int { return PrivateKeySize } +func (*scheme) SignatureSize() int { return SignatureSize } +func (*scheme) SeedSize() int { return SeedSize } + +// TODO TLSIdentifier() + +func (*scheme) SupportsContext() bool { + return false +} + +func (*scheme) GenerateKey() (sign.PublicKey, sign.PrivateKey, error) { + return GenerateKey(nil) +} + +func (*scheme) Sign( + sk sign.PrivateKey, + msg []byte, + opts *sign.SignatureOpts, +) []byte { + sig := make([]byte, SignatureSize) + + priv, ok := sk.(*PrivateKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + panic(sign.ErrContextNotSupported) + } + SignTo(priv, msg, sig) + + return sig +} + +func (*scheme) Verify( + pk sign.PublicKey, + msg, sig []byte, + opts *sign.SignatureOpts, +) bool { + pub, ok := pk.(*PublicKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + panic(sign.ErrContextNotSupported) + } + return Verify(pub, msg, sig) +} + +func (*scheme) DeriveKey(seed []byte) (sign.PublicKey, sign.PrivateKey) { + if len(seed) != SeedSize { + panic(sign.ErrSeedSize) + } + var seed2 [SeedSize]byte + copy(seed2[:], seed) + return NewKeyFromSeed(&seed2) +} + +func (*scheme) UnmarshalBinaryPublicKey(buf []byte) (sign.PublicKey, error) { + if len(buf) != PublicKeySize { + return nil, sign.ErrPubKeySize + } + + var ( + buf2 [PublicKeySize]byte + ret PublicKey + ) + + copy(buf2[:], buf) + ret.Unpack(&buf2) + return &ret, nil +} + +func (*scheme) UnmarshalBinaryPrivateKey(buf []byte) (sign.PrivateKey, error) { + if len(buf) != PrivateKeySize { + return nil, sign.ErrPrivKeySize + } + + var ( + buf2 [PrivateKeySize]byte + ret PrivateKey + ) + + copy(buf2[:], buf) + ret.Unpack(&buf2) + return &ret, nil +} + +func (sk *PrivateKey) Scheme() sign.Scheme { + return sch +} + +func (sk *PublicKey) Scheme() sign.Scheme { + return sch +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/dilithium.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/dilithium.go new file mode 100644 index 0000000..0f9b76d --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/dilithium.go @@ -0,0 +1,489 @@ +package internal + +import ( + cryptoRand "crypto/rand" + "crypto/subtle" + "io" + + "github.com/cloudflare/circl/internal/sha3" + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +const ( + // Size of a packed polynomial of norm ≤η. + // (Note that the formula is not valid in general.) + PolyLeqEtaSize = (common.N * DoubleEtaBits) / 8 + + // β = τη, the maximum size of c s₂. + Beta = Tau * Eta + + // γ₁ range of y + Gamma1 = 1 << Gamma1Bits + + // Size of packed polynomial of norm <γ₁ such as z + PolyLeGamma1Size = (Gamma1Bits + 1) * common.N / 8 + + // α = 2γ₂ parameter for decompose + Alpha = 2 * Gamma2 + + // Size of a packed private key + PrivateKeySize = 32 + 32 + TRSize + PolyLeqEtaSize*(L+K) + common.PolyT0Size*K + + // Size of a packed public key + PublicKeySize = 32 + common.PolyT1Size*K + + // Size of a packed signature + SignatureSize = L*PolyLeGamma1Size + Omega + K + CTildeSize + + // Size of packed w₁ + PolyW1Size = (common.N * (common.QBits - Gamma1Bits)) / 8 +) + +// PublicKey is the type of Dilithium public keys. +type PublicKey struct { + rho [32]byte + t1 VecK + + // Cached values + t1p [common.PolyT1Size * K]byte + A *Mat + tr *[TRSize]byte +} + +// PrivateKey is the type of Dilithium private keys. +type PrivateKey struct { + rho [32]byte + key [32]byte + s1 VecL + s2 VecK + t0 VecK + tr [TRSize]byte + + // Cached values + A Mat // ExpandA(ρ) + s1h VecL // NTT(s₁) + s2h VecK // NTT(s₂) + t0h VecK // NTT(t₀) +} + +type unpackedSignature struct { + z VecL + hint VecK + c [CTildeSize]byte +} + +// Packs the signature into buf. +func (sig *unpackedSignature) Pack(buf []byte) { + copy(buf[:], sig.c[:]) + sig.z.PackLeGamma1(buf[CTildeSize:]) + sig.hint.PackHint(buf[CTildeSize+L*PolyLeGamma1Size:]) +} + +// Sets sig to the signature encoded in the buffer. +// +// Returns whether buf contains a properly packed signature. +func (sig *unpackedSignature) Unpack(buf []byte) bool { + if len(buf) < SignatureSize { + return false + } + copy(sig.c[:], buf[:]) + sig.z.UnpackLeGamma1(buf[CTildeSize:]) + if sig.z.Exceeds(Gamma1 - Beta) { + return false + } + if !sig.hint.UnpackHint(buf[CTildeSize+L*PolyLeGamma1Size:]) { + return false + } + return true +} + +// Packs the public key into buf. +func (pk *PublicKey) Pack(buf *[PublicKeySize]byte) { + copy(buf[:32], pk.rho[:]) + copy(buf[32:], pk.t1p[:]) +} + +// Sets pk to the public key encoded in buf. +func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte) { + copy(pk.rho[:], buf[:32]) + copy(pk.t1p[:], buf[32:]) + + pk.t1.UnpackT1(pk.t1p[:]) + pk.A = new(Mat) + pk.A.Derive(&pk.rho) + + // tr = CRH(ρ ‖ t1) = CRH(pk) + pk.tr = new([TRSize]byte) + h := sha3.NewShake256() + _, _ = h.Write(buf[:]) + _, _ = h.Read(pk.tr[:]) +} + +// Packs the private key into buf. +func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte) { + copy(buf[:32], sk.rho[:]) + copy(buf[32:64], sk.key[:]) + copy(buf[64:64+TRSize], sk.tr[:]) + offset := 64 + TRSize + sk.s1.PackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * L + sk.s2.PackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * K + sk.t0.PackT0(buf[offset:]) +} + +// Sets sk to the private key encoded in buf. +func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte) { + copy(sk.rho[:], buf[:32]) + copy(sk.key[:], buf[32:64]) + copy(sk.tr[:], buf[64:64+TRSize]) + offset := 64 + TRSize + sk.s1.UnpackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * L + sk.s2.UnpackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * K + sk.t0.UnpackT0(buf[offset:]) + + // Cached values + sk.A.Derive(&sk.rho) + sk.t0h = sk.t0 + sk.t0h.NTT() + sk.s1h = sk.s1 + sk.s1h.NTT() + sk.s2h = sk.s2 + sk.s2h.NTT() +} + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error) { + var seed [32]byte + if rand == nil { + rand = cryptoRand.Reader + } + _, err := io.ReadFull(rand, seed[:]) + if err != nil { + return nil, nil, err + } + pk, sk := NewKeyFromSeed(&seed) + return pk, sk, nil +} + +// NewKeyFromSeed derives a public/private key pair using the given seed. +func NewKeyFromSeed(seed *[common.SeedSize]byte) (*PublicKey, *PrivateKey) { + var eSeed [128]byte // expanded seed + var pk PublicKey + var sk PrivateKey + var sSeed [64]byte + + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + + if NIST { + _, _ = h.Write([]byte{byte(K), byte(L)}) + } + + _, _ = h.Read(eSeed[:]) + + copy(pk.rho[:], eSeed[:32]) + copy(sSeed[:], eSeed[32:96]) + copy(sk.key[:], eSeed[96:]) + copy(sk.rho[:], pk.rho[:]) + + sk.A.Derive(&pk.rho) + + for i := uint16(0); i < L; i++ { + PolyDeriveUniformLeqEta(&sk.s1[i], &sSeed, i) + } + + for i := uint16(0); i < K; i++ { + PolyDeriveUniformLeqEta(&sk.s2[i], &sSeed, i+L) + } + + sk.s1h = sk.s1 + sk.s1h.NTT() + sk.s2h = sk.s2 + sk.s2h.NTT() + + sk.computeT0andT1(&sk.t0, &pk.t1) + + sk.t0h = sk.t0 + sk.t0h.NTT() + + // Complete public key far enough to be packed + pk.t1.PackT1(pk.t1p[:]) + pk.A = &sk.A + + // Finish private key + var packedPk [PublicKeySize]byte + pk.Pack(&packedPk) + + // tr = CRH(ρ ‖ t1) = CRH(pk) + h.Reset() + _, _ = h.Write(packedPk[:]) + _, _ = h.Read(sk.tr[:]) + + // Finish cache of public key + pk.tr = &sk.tr + + return &pk, &sk +} + +// Computes t0 and t1 from sk.s1h, sk.s2 and sk.A. +func (sk *PrivateKey) computeT0andT1(t0, t1 *VecK) { + var t VecK + + // Set t to A s₁ + s₂ + for i := 0; i < K; i++ { + PolyDotHat(&t[i], &sk.A[i], &sk.s1h) + t[i].ReduceLe2Q() + t[i].InvNTT() + } + t.Add(&t, &sk.s2) + t.Normalize() + + // Compute t₀, t₁ = Power2Round(t) + t.Power2Round(t0, t1) +} + +// Verify checks whether the given signature by pk on msg is valid. +// +// For Dilithium this is the top-level verification function. +// In ML-DSA, this is ML-DSA.Verify_internal. +func Verify(pk *PublicKey, msg func(io.Writer), signature []byte) bool { + var sig unpackedSignature + var mu [64]byte + var zh VecL + var Az, Az2dct1, w1 VecK + var ch common.Poly + var cp [CTildeSize]byte + var w1Packed [PolyW1Size * K]byte + + // Note that Unpack() checked whether ‖z‖_∞ < γ₁ - β + // and ensured that there at most ω ones in pk.hint. + if !sig.Unpack(signature) { + return false + } + + // μ = CRH(tr ‖ msg) + h := sha3.NewShake256() + _, _ = h.Write(pk.tr[:]) + msg(&h) + _, _ = h.Read(mu[:]) + + // Compute Az + zh = sig.z + zh.NTT() + + for i := 0; i < K; i++ { + PolyDotHat(&Az[i], &pk.A[i], &zh) + } + + // Next, we compute Az - 2ᵈ·c·t₁. + // Note that the coefficients of t₁ are bounded by 256 = 2⁹, + // so the coefficients of Az2dct1 will bounded by 2⁹⁺ᵈ = 2²³ < 2q, + // which is small enough for NTT(). + Az2dct1.MulBy2toD(&pk.t1) + Az2dct1.NTT() + PolyDeriveUniformBall(&ch, sig.c[:]) + ch.NTT() + for i := 0; i < K; i++ { + Az2dct1[i].MulHat(&Az2dct1[i], &ch) + } + Az2dct1.Sub(&Az, &Az2dct1) + Az2dct1.ReduceLe2Q() + Az2dct1.InvNTT() + Az2dct1.NormalizeAssumingLe2Q() + + // UseHint(pk.hint, Az - 2ᵈ·c·t₁) + // = UseHint(pk.hint, w - c·s₂ + c·t₀) + // = UseHint(pk.hint, r + c·t₀) + // = r₁ = w₁. + w1.UseHint(&Az2dct1, &sig.hint) + w1.PackW1(w1Packed[:]) + + // c' = H(μ, w₁) + h.Reset() + _, _ = h.Write(mu[:]) + _, _ = h.Write(w1Packed[:]) + _, _ = h.Read(cp[:]) + + return sig.c == cp +} + +// SignTo signs the given message and writes the signature into signature. +// +// For Dilithium this is the top-level signing function. For ML-DSA +// this is ML-DSA.Sign_internal. +// +//nolint:funlen +func SignTo(sk *PrivateKey, msg func(io.Writer), rnd [32]byte, signature []byte) { + var mu, rhop [64]byte + var w1Packed [PolyW1Size * K]byte + var y, yh VecL + var w, w0, w1, w0mcs2, ct0, w0mcs2pct0 VecK + var ch common.Poly + var yNonce uint16 + var sig unpackedSignature + + if len(signature) < SignatureSize { + panic("Signature does not fit in that byteslice") + } + + // μ = CRH(tr ‖ msg) + h := sha3.NewShake256() + _, _ = h.Write(sk.tr[:]) + msg(&h) + _, _ = h.Read(mu[:]) + + // ρ' = CRH(key ‖ μ) + h.Reset() + _, _ = h.Write(sk.key[:]) + if NIST { + _, _ = h.Write(rnd[:]) + } + _, _ = h.Write(mu[:]) + _, _ = h.Read(rhop[:]) + + // Main rejection loop + attempt := 0 + for { + attempt++ + if attempt >= 576 { + // Depending on the mode, one try has a chance between 1/7 and 1/4 + // of succeeding. Thus it is safe to say that 576 iterations + // are enough as (6/7)⁵⁷⁶ < 2⁻¹²⁸. + panic("This should only happen 1 in 2^{128}: something is wrong.") + } + + // y = ExpandMask(ρ', key) + VecLDeriveUniformLeGamma1(&y, &rhop, yNonce) + yNonce += uint16(L) + + // Set w to A y + yh = y + yh.NTT() + for i := 0; i < K; i++ { + PolyDotHat(&w[i], &sk.A[i], &yh) + w[i].ReduceLe2Q() + w[i].InvNTT() + } + + // Decompose w into w₀ and w₁ + w.NormalizeAssumingLe2Q() + w.Decompose(&w0, &w1) + + // c~ = H(μ ‖ w₁) + w1.PackW1(w1Packed[:]) + h.Reset() + _, _ = h.Write(mu[:]) + _, _ = h.Write(w1Packed[:]) + _, _ = h.Read(sig.c[:]) + + PolyDeriveUniformBall(&ch, sig.c[:]) + ch.NTT() + + // Ensure ‖ w₀ - c·s2 ‖_∞ < γ₂ - β. + // + // By Lemma 3 of the specification this is equivalent to checking that + // both ‖ r₀ ‖_∞ < γ₂ - β and r₁ = w₁, for the decomposition + // w - c·s₂ = r₁ α + r₀ as computed by decompose(). + // See also §4.1 of the specification. + for i := 0; i < K; i++ { + w0mcs2[i].MulHat(&ch, &sk.s2h[i]) + w0mcs2[i].InvNTT() + } + w0mcs2.Sub(&w0, &w0mcs2) + w0mcs2.Normalize() + + if w0mcs2.Exceeds(Gamma2 - Beta) { + continue + } + + // z = y + c·s₁ + for i := 0; i < L; i++ { + sig.z[i].MulHat(&ch, &sk.s1h[i]) + sig.z[i].InvNTT() + } + sig.z.Add(&sig.z, &y) + sig.z.Normalize() + + // Ensure ‖z‖_∞ < γ₁ - β + if sig.z.Exceeds(Gamma1 - Beta) { + continue + } + + // Compute c·t₀ + for i := 0; i < K; i++ { + ct0[i].MulHat(&ch, &sk.t0h[i]) + ct0[i].InvNTT() + } + ct0.NormalizeAssumingLe2Q() + + // Ensure ‖c·t₀‖_∞ < γ₂. + if ct0.Exceeds(Gamma2) { + continue + } + + // Create the hint to be able to reconstruct w₁ from w - c·s₂ + c·t0. + // Note that we're not using makeHint() in the obvious way as we + // do not know whether ‖ sc·s₂ - c·t₀ ‖_∞ < γ₂. Instead we note + // that our makeHint() is actually the same as a makeHint for a + // different decomposition: + // + // Earlier we ensured indirectly with a check that r₁ = w₁ where + // r = w - c·s₂. Hence r₀ = r - r₁ α = w - c·s₂ - w₁ α = w₀ - c·s₂. + // Thus MakeHint(w₀ - c·s₂ + c·t₀, w₁) = MakeHint(r0 + c·t₀, r₁) + // and UseHint(w - c·s₂ + c·t₀, w₁) = UseHint(r + c·t₀, r₁). + // As we just ensured that ‖ c·t₀ ‖_∞ < γ₂ our usage is correct. + w0mcs2pct0.Add(&w0mcs2, &ct0) + w0mcs2pct0.NormalizeAssumingLe2Q() + hintPop := sig.hint.MakeHint(&w0mcs2pct0, &w1) + if hintPop > Omega { + continue + } + + break + } + + sig.Pack(signature[:]) +} + +// Computes the public key corresponding to this private key. +func (sk *PrivateKey) Public() *PublicKey { + var t0 VecK + pk := &PublicKey{ + rho: sk.rho, + A: &sk.A, + tr: &sk.tr, + } + sk.computeT0andT1(&t0, &pk.t1) + pk.t1.PackT1(pk.t1p[:]) + return pk +} + +// Equal returns whether the two public keys are equal +func (pk *PublicKey) Equal(other *PublicKey) bool { + return pk.rho == other.rho && pk.t1 == other.t1 +} + +// Equal returns whether the two private keys are equal +func (sk *PrivateKey) Equal(other *PrivateKey) bool { + ret := (subtle.ConstantTimeCompare(sk.rho[:], other.rho[:]) & + subtle.ConstantTimeCompare(sk.key[:], other.key[:]) & + subtle.ConstantTimeCompare(sk.tr[:], other.tr[:])) + + acc := uint32(0) + for i := 0; i < L; i++ { + for j := 0; j < common.N; j++ { + acc |= sk.s1[i][j] ^ other.s1[i][j] + } + } + for i := 0; i < K; i++ { + for j := 0; j < common.N; j++ { + acc |= sk.s2[i][j] ^ other.s2[i][j] + acc |= sk.t0[i][j] ^ other.t0[i][j] + } + } + return (ret & subtle.ConstantTimeEq(int32(acc), 0)) == 1 +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/mat.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/mat.go new file mode 100644 index 0000000..3d6cc47 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/mat.go @@ -0,0 +1,57 @@ +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// A k by l matrix of polynomials. +type Mat [K]VecL + +// Expands the given seed to a complete matrix. +// +// This function is called ExpandA in the specification. +func (m *Mat) Derive(seed *[32]byte) { + if !DeriveX4Available { + for i := uint16(0); i < K; i++ { + for j := uint16(0); j < L; j++ { + PolyDeriveUniform(&m[i][j], seed, (i<<8)+j) + } + } + return + } + + idx := 0 + var nonces [4]uint16 + var ps [4]*common.Poly + for i := uint16(0); i < K; i++ { + for j := uint16(0); j < L; j++ { + nonces[idx] = (i << 8) + j + ps[idx] = &m[i][j] + idx++ + if idx == 4 { + idx = 0 + PolyDeriveUniformX4(ps, seed, nonces) + } + } + } + if idx != 0 { + for i := idx; i < 4; i++ { + ps[i] = nil + } + PolyDeriveUniformX4(ps, seed, nonces) + } +} + +// Set p to the inner product of a and b using pointwise multiplication. +// +// Assumes a and b are in Montgomery form and their coefficients are +// pairwise sufficiently small to multiply, see Poly.MulHat(). Resulting +// coefficients are bounded by 2Lq. +func PolyDotHat(p *common.Poly, a, b *VecL) { + var t common.Poly + *p = common.Poly{} // zero p + for i := 0; i < L; i++ { + t.MulHat(&a[i], &b[i]) + p.Add(&t, p) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/pack.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/pack.go new file mode 100644 index 0000000..d9c80d0 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/pack.go @@ -0,0 +1,268 @@ +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// Writes p with norm less than or equal η into buf, which must be of +// size PolyLeqEtaSize. +// +// Assumes coefficients of p are not normalized, but in [q-η,q+η]. +func PolyPackLeqEta(p *common.Poly, buf []byte) { + if DoubleEtaBits == 4 { // compiler eliminates branch + j := 0 + for i := 0; i < PolyLeqEtaSize; i++ { + buf[i] = (byte(common.Q+Eta-p[j]) | + byte(common.Q+Eta-p[j+1])<<4) + j += 2 + } + } else if DoubleEtaBits == 3 { + j := 0 + for i := 0; i < PolyLeqEtaSize; i += 3 { + buf[i] = (byte(common.Q+Eta-p[j]) | + (byte(common.Q+Eta-p[j+1]) << 3) | + (byte(common.Q+Eta-p[j+2]) << 6)) + buf[i+1] = ((byte(common.Q+Eta-p[j+2]) >> 2) | + (byte(common.Q+Eta-p[j+3]) << 1) | + (byte(common.Q+Eta-p[j+4]) << 4) | + (byte(common.Q+Eta-p[j+5]) << 7)) + buf[i+2] = ((byte(common.Q+Eta-p[j+5]) >> 1) | + (byte(common.Q+Eta-p[j+6]) << 2) | + (byte(common.Q+Eta-p[j+7]) << 5)) + j += 8 + } + } else { + panic("eta not supported") + } +} + +// Sets p to the polynomial of norm less than or equal η encoded in the +// given buffer of size PolyLeqEtaSize. +// +// Output coefficients of p are not normalized, but in [q-η,q+η] provided +// buf was created using PackLeqEta. +// +// Beware, for arbitrary buf the coefficients of p might end up in +// the interval [q-2^b,q+2^b] where b is the least b with η≤2^b. +func PolyUnpackLeqEta(p *common.Poly, buf []byte) { + if DoubleEtaBits == 4 { // compiler eliminates branch + j := 0 + for i := 0; i < PolyLeqEtaSize; i++ { + p[j] = common.Q + Eta - uint32(buf[i]&15) + p[j+1] = common.Q + Eta - uint32(buf[i]>>4) + j += 2 + } + } else if DoubleEtaBits == 3 { + j := 0 + for i := 0; i < PolyLeqEtaSize; i += 3 { + p[j] = common.Q + Eta - uint32(buf[i]&7) + p[j+1] = common.Q + Eta - uint32((buf[i]>>3)&7) + p[j+2] = common.Q + Eta - uint32((buf[i]>>6)|((buf[i+1]<<2)&7)) + p[j+3] = common.Q + Eta - uint32((buf[i+1]>>1)&7) + p[j+4] = common.Q + Eta - uint32((buf[i+1]>>4)&7) + p[j+5] = common.Q + Eta - uint32((buf[i+1]>>7)|((buf[i+2]<<1)&7)) + p[j+6] = common.Q + Eta - uint32((buf[i+2]>>2)&7) + p[j+7] = common.Q + Eta - uint32((buf[i+2]>>5)&7) + j += 8 + } + } else { + panic("eta not supported") + } +} + +// Writes v with coefficients in {0, 1} of which at most ω non-zero +// to buf, which must have length ω+k. +func (v *VecK) PackHint(buf []byte) { + // The packed hint starts with the indices of the non-zero coefficients + // For instance: + // + // (x⁵⁶ + x¹⁰⁰, x²⁵⁵, 0, x² + x²³, x¹) + // + // Yields + // + // 56, 100, 255, 2, 23, 1 + // + // Then we pad with zeroes until we have a list of ω items: + // // 56, 100, 255, 2, 23, 1, 0, 0, ..., 0 + // + // Then we finish with a list of the switch-over-indices in this + // list between polynomials, so: + // + // 56, 100, 255, 2, 23, 1, 0, 0, ..., 0, 2, 3, 3, 5, 6 + + off := uint8(0) + for i := 0; i < K; i++ { + for j := uint16(0); j < common.N; j++ { + if v[i][j] != 0 { + buf[off] = uint8(j) + off++ + } + } + buf[Omega+i] = off + } + for ; off < Omega; off++ { + buf[off] = 0 + } +} + +// Sets v to the vector encoded using VecK.PackHint() +// +// Returns whether unpacking was successful. +func (v *VecK) UnpackHint(buf []byte) bool { + // A priori, there would be several reasonable ways to encode the same + // hint vector. We take care to only allow only one encoding, to ensure + // "strong unforgeability". + // + // See PackHint() source for description of the encoding. + *v = VecK{} // zero v + prevSOP := uint8(0) // previous switch-over-point + for i := 0; i < K; i++ { + SOP := buf[Omega+i] + if SOP < prevSOP || SOP > Omega { + return false // ensures switch-over-points are increasing + } + for j := prevSOP; j < SOP; j++ { + if j > prevSOP && buf[j] <= buf[j-1] { + return false // ensures indices are increasing (within a poly) + } + v[i][buf[j]] = 1 + } + prevSOP = SOP + } + for j := prevSOP; j < Omega; j++ { + if buf[j] != 0 { + return false // ensures padding indices are zero + } + } + + return true +} + +// Sets p to the polynomial packed into buf by PolyPackLeGamma1. +// +// p will be normalized. +func PolyUnpackLeGamma1(p *common.Poly, buf []byte) { + if Gamma1Bits == 17 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 9 { + p0 := uint32(buf[i]) | (uint32(buf[i+1]) << 8) | + (uint32(buf[i+2]&0x3) << 16) + p1 := uint32(buf[i+2]>>2) | (uint32(buf[i+3]) << 6) | + (uint32(buf[i+4]&0xf) << 14) + p2 := uint32(buf[i+4]>>4) | (uint32(buf[i+5]) << 4) | + (uint32(buf[i+6]&0x3f) << 12) + p3 := uint32(buf[i+6]>>6) | (uint32(buf[i+7]) << 2) | + (uint32(buf[i+8]) << 10) + + // coefficients in [0,…,2γ₁) + p0 = Gamma1 - p0 // (-γ₁,…,γ₁] + p1 = Gamma1 - p1 + p2 = Gamma1 - p2 + p3 = Gamma1 - p3 + + p0 += uint32(int32(p0)>>31) & common.Q // normalize + p1 += uint32(int32(p1)>>31) & common.Q + p2 += uint32(int32(p2)>>31) & common.Q + p3 += uint32(int32(p3)>>31) & common.Q + + p[j] = p0 + p[j+1] = p1 + p[j+2] = p2 + p[j+3] = p3 + + j += 4 + } + } else if Gamma1Bits == 19 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 5 { + p0 := uint32(buf[i]) | (uint32(buf[i+1]) << 8) | + (uint32(buf[i+2]&0xf) << 16) + p1 := uint32(buf[i+2]>>4) | (uint32(buf[i+3]) << 4) | + (uint32(buf[i+4]) << 12) + + p0 = Gamma1 - p0 + p1 = Gamma1 - p1 + + p0 += uint32(int32(p0)>>31) & common.Q + p1 += uint32(int32(p1)>>31) & common.Q + + p[j] = p0 + p[j+1] = p1 + + j += 2 + } + } else { + panic("γ₁ not supported") + } +} + +// Writes p whose coefficients are in (-γ₁,γ₁] into buf +// which has to be of length PolyLeGamma1Size. +// +// Assumes p is normalized. +func PolyPackLeGamma1(p *common.Poly, buf []byte) { + if Gamma1Bits == 17 { + j := 0 + // coefficients in [0,…,γ₁] ∪ (q-γ₁,…,q) + for i := 0; i < PolyLeGamma1Size; i += 9 { + p0 := Gamma1 - p[j] // [0,…,γ₁] ∪ (γ₁-q,…,2γ₁-q) + p0 += uint32(int32(p0)>>31) & common.Q // [0,…,2γ₁) + p1 := Gamma1 - p[j+1] + p1 += uint32(int32(p1)>>31) & common.Q + p2 := Gamma1 - p[j+2] + p2 += uint32(int32(p2)>>31) & common.Q + p3 := Gamma1 - p[j+3] + p3 += uint32(int32(p3)>>31) & common.Q + + buf[i+0] = byte(p0) + buf[i+1] = byte(p0 >> 8) + buf[i+2] = byte(p0>>16) | byte(p1<<2) + buf[i+3] = byte(p1 >> 6) + buf[i+4] = byte(p1>>14) | byte(p2<<4) + buf[i+5] = byte(p2 >> 4) + buf[i+6] = byte(p2>>12) | byte(p3<<6) + buf[i+7] = byte(p3 >> 2) + buf[i+8] = byte(p3 >> 10) + + j += 4 + } + } else if Gamma1Bits == 19 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 5 { + // Coefficients are in [0, γ₁] ∪ (Q-γ₁, Q) + p0 := Gamma1 - p[j] + p0 += uint32(int32(p0)>>31) & common.Q + p1 := Gamma1 - p[j+1] + p1 += uint32(int32(p1)>>31) & common.Q + + buf[i+0] = byte(p0) + buf[i+1] = byte(p0 >> 8) + buf[i+2] = byte(p0>>16) | byte(p1<<4) + buf[i+3] = byte(p1 >> 4) + buf[i+4] = byte(p1 >> 12) + + j += 2 + } + } else { + panic("γ₁ not supported") + } +} + +// Pack w₁ into buf, which must be of length PolyW1Size. +// +// Assumes w₁ is normalized. +func PolyPackW1(p *common.Poly, buf []byte) { + if Gamma1Bits == 19 { + p.PackLe16(buf) + } else if Gamma1Bits == 17 { + j := 0 + for i := 0; i < PolyW1Size; i += 3 { + buf[i] = byte(p[j]) | byte(p[j+1]<<6) + buf[i+1] = byte(p[j+1]>>2) | byte(p[j+2]<<4) + buf[i+2] = byte(p[j+2]>>4) | byte(p[j+3]<<2) + j += 4 + } + } else { + panic("unsupported γ₁") + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/params.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/params.go new file mode 100644 index 0000000..5aa596d --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/params.go @@ -0,0 +1,18 @@ +// Code generated from params.templ.go. DO NOT EDIT. + +package internal + +const ( + Name = "Dilithium3" + K = 6 + L = 5 + Eta = 4 + DoubleEtaBits = 4 + Omega = 55 + Tau = 49 + Gamma1Bits = 19 + Gamma2 = 261888 + NIST = false + TRSize = 32 + CTildeSize = 32 +) diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/rounding.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/rounding.go new file mode 100644 index 0000000..4005e56 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/rounding.go @@ -0,0 +1,140 @@ +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// Splits 0 ≤ a < q into a₀ and a₁ with a = a₁*α + a₀ with -α/2 < a₀ ≤ α/2, +// except for when we would have a₁ = (q-1)/α in which case a₁=0 is taken +// and -α/2 ≤ a₀ < 0. Returns a₀ + q. Note 0 ≤ a₁ < (q-1)/α. +// Recall α = 2γ₂. +func decompose(a uint32) (a0plusQ, a1 uint32) { + // a₁ = ⌈a / 128⌉ + a1 = (a + 127) >> 7 + + if Alpha == 523776 { + // 1025/2²² is close enough to 1/4092 so that a₁ + // becomes a/α rounded down. + a1 = ((a1*1025 + (1 << 21)) >> 22) + + // For the corner-case a₁ = (q-1)/α = 16, we have to set a₁=0. + a1 &= 15 + } else if Alpha == 190464 { + // 1488/2²⁴ is close enough to 1/1488 so that a₁ + // becomes a/α rounded down. + a1 = ((a1 * 11275) + (1 << 23)) >> 24 + + // For the corner-case a₁ = (q-1)/α = 44, we have to set a₁=0. + a1 ^= uint32(int32(43-a1)>>31) & a1 + } else { + panic("unsupported α") + } + + a0plusQ = a - a1*Alpha + + // In the corner-case, when we set a₁=0, we will incorrectly + // have a₀ > (q-1)/2 and we'll need to subtract q. As we + // return a₀ + q, that comes down to adding q if a₀ < (q-1)/2. + a0plusQ += uint32(int32(a0plusQ-(common.Q-1)/2)>>31) & common.Q + + return +} + +// Assume 0 ≤ r, f < Q with ‖f‖_∞ ≤ α/2. Decompose r as r = r1*α + r0 as +// computed by decompose(). Write r' := r - f (mod Q). Now, decompose +// r'=r-f again as r' = r'1*α + r'0 using decompose(). As f is small, we +// have r'1 = r1 + h, where h ∈ {-1, 0, 1}. makeHint() computes |h| +// given z0 := r0 - f (mod Q) and r1. With |h|, which is called the hint, +// we can reconstruct r1 using only r' = r - f, which is done by useHint(). +// To wit: +// +// useHint( r - f, makeHint( r0 - f, r1 ) ) = r1. +// +// Assumes 0 ≤ z0 < Q. +func makeHint(z0, r1 uint32) uint32 { + // If -α/2 < r0 - f ≤ α/2, then r1*α + r0 - f is a valid decomposition of r' + // with the restrictions of decompose() and so r'1 = r1. So the hint + // should be 0. This is covered by the first two inequalities. + // There is one other case: if r0 - f = -α/2, then r1*α + r0 - f is also + // a valid decomposition if r1 = 0. In the other cases a one is carried + // and the hint should be 1. + if z0 <= Gamma2 || z0 > common.Q-Gamma2 || (z0 == common.Q-Gamma2 && r1 == 0) { + return 0 + } + return 1 +} + +// Uses the hint created by makeHint() to reconstruct r1 from r'=r-f; see +// documentation of makeHint() for context. +// Assumes 0 ≤ r' < Q. +func useHint(rp uint32, hint uint32) uint32 { + rp0plusQ, rp1 := decompose(rp) + if hint == 0 { + return rp1 + } + if rp0plusQ > common.Q { + return (rp1 + 1) & 15 + } + return (rp1 - 1) & 15 +} + +// Sets p to the hint polynomial for p0 the modified low bits and p1 +// the unmodified high bits --- see makeHint(). +// +// Returns the number of ones in the hint polynomial. +func PolyMakeHint(p, p0, p1 *common.Poly) (pop uint32) { + for i := 0; i < common.N; i++ { + h := makeHint(p0[i], p1[i]) + pop += h + p[i] = h + } + return +} + +// Computes corrections to the high bits of the polynomial q according +// to the hints in h and sets p to the corrected high bits. Returns p. +func PolyUseHint(p, q, hint *common.Poly) { + var q0PlusQ common.Poly + + // See useHint() and makeHint() for an explanation. We reimplement it + // here so that we can call Poly.Decompose(), which might be way faster + // than calling decompose() in a loop (for instance when having AVX2.) + + PolyDecompose(q, &q0PlusQ, p) + + for i := 0; i < common.N; i++ { + if hint[i] == 0 { + continue + } + if Gamma2 == 261888 { + if q0PlusQ[i] > common.Q { + p[i] = (p[i] + 1) & 15 + } else { + p[i] = (p[i] - 1) & 15 + } + } else if Gamma2 == 95232 { + if q0PlusQ[i] > common.Q { + if p[i] == 43 { + p[i] = 0 + } else { + p[i]++ + } + } else { + if p[i] == 0 { + p[i] = 43 + } else { + p[i]-- + } + } + } else { + panic("unsupported γ₂") + } + } +} + +// Splits each of the coefficients of p using decompose. +func PolyDecompose(p, p0PlusQ, p1 *common.Poly) { + for i := 0; i < common.N; i++ { + p0PlusQ[i], p1[i] = decompose(p[i]) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/sample.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/sample.go new file mode 100644 index 0000000..f90d211 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/sample.go @@ -0,0 +1,337 @@ +package internal + +import ( + "encoding/binary" + + "github.com/cloudflare/circl/internal/sha3" + common "github.com/cloudflare/circl/sign/internal/dilithium" + "github.com/cloudflare/circl/simd/keccakf1600" +) + +// DeriveX4Available indicates whether the system supports the quick fourway +// sampling variants like PolyDeriveUniformX4. +var DeriveX4Available = keccakf1600.IsEnabledX4() + +// For each i, sample ps[i] uniformly from the given seed and nonces[i]. +// ps[i] may be nil and is ignored in that case. +// +// Can only be called when DeriveX4Available is true. +func PolyDeriveUniformX4(ps [4]*common.Poly, seed *[32]byte, nonces [4]uint16) { + var perm keccakf1600.StateX4 + state := perm.Initialize(false) + + // Absorb the seed in the four states + for i := 0; i < 4; i++ { + v := binary.LittleEndian.Uint64(seed[8*i : 8*(i+1)]) + for j := 0; j < 4; j++ { + state[i*4+j] = v + } + } + + // Absorb the nonces, the SHAKE128 domain separator (0b1111), the + // start of the padding (0b...001) and the end of the padding 0b100... + // Recall that the rate of SHAKE128 is 168 --- i.e. 21 uint64s. + for j := 0; j < 4; j++ { + state[4*4+j] = uint64(nonces[j]) | (0x1f << 16) + state[20*4+j] = 0x80 << 56 + } + + var idx [4]int // indices into ps + for j := 0; j < 4; j++ { + if ps[j] == nil { + idx[j] = common.N // mark nil polynomial as completed + } + } + + done := false + for !done { + // Applies KeccaK-f[1600] to state to get the next 21 uint64s of each + // of the four SHAKE128 streams. + perm.Permute() + + done = true + + PolyLoop: + for j := 0; j < 4; j++ { + if idx[j] == common.N { + continue + } + for i := 0; i < 7; i++ { + var t [8]uint32 + t[0] = uint32(state[i*3*4+j] & 0x7fffff) + t[1] = uint32((state[i*3*4+j] >> 24) & 0x7fffff) + t[2] = uint32((state[i*3*4+j] >> 48) | + ((state[(i*3+1)*4+j] & 0x7f) << 16)) + t[3] = uint32((state[(i*3+1)*4+j] >> 8) & 0x7fffff) + t[4] = uint32((state[(i*3+1)*4+j] >> 32) & 0x7fffff) + t[5] = uint32((state[(i*3+1)*4+j] >> 56) | + ((state[(i*3+2)*4+j] & 0x7fff) << 8)) + t[6] = uint32((state[(i*3+2)*4+j] >> 16) & 0x7fffff) + t[7] = uint32((state[(i*3+2)*4+j] >> 40) & 0x7fffff) + + for k := 0; k < 8; k++ { + if t[k] < common.Q { + ps[j][idx[j]] = t[k] + idx[j]++ + if idx[j] == common.N { + continue PolyLoop + } + } + } + } + done = false + } + } +} + +// Sample p uniformly from the given seed and nonce. +// +// p will be normalized. +func PolyDeriveUniform(p *common.Poly, seed *[32]byte, nonce uint16) { + var i, length int + var buf [12 * 16]byte // fits 168B SHAKE-128 rate + + length = 168 + + sample := func() { + // Note that 3 divides into 168 and 12*16, so we use up buf completely. + for j := 0; j < length && i < common.N; j += 3 { + t := (uint32(buf[j]) | (uint32(buf[j+1]) << 8) | + (uint32(buf[j+2]) << 16)) & 0x7fffff + + // We use rejection sampling + if t < common.Q { + p[i] = t + i++ + } + } + } + + var iv [32 + 2]byte // 32 byte seed + uint16 nonce + h := sha3.NewShake128() + copy(iv[:32], seed[:]) + iv[32] = uint8(nonce) + iv[33] = uint8(nonce >> 8) + _, _ = h.Write(iv[:]) + + for i < common.N { + _, _ = h.Read(buf[:168]) + sample() + } +} + +// Sample p uniformly with coefficients of norm less than or equal η, +// using the given seed and nonce. +// +// p will not be normalized, but will have coefficients in [q-η,q+η]. +func PolyDeriveUniformLeqEta(p *common.Poly, seed *[64]byte, nonce uint16) { + // Assumes 2 < η < 8. + var i, length int + var buf [9 * 16]byte // fits 136B SHAKE-256 rate + + length = 136 + + sample := func() { + // We use rejection sampling + for j := 0; j < length && i < common.N; j++ { + t1 := uint32(buf[j]) & 15 + t2 := uint32(buf[j]) >> 4 + if Eta == 2 { // branch is eliminated by compiler + if t1 <= 14 { + t1 -= ((205 * t1) >> 10) * 5 // reduce mod 5 + p[i] = common.Q + Eta - t1 + i++ + } + if t2 <= 14 && i < common.N { + t2 -= ((205 * t2) >> 10) * 5 // reduce mod 5 + p[i] = common.Q + Eta - t2 + i++ + } + } else if Eta == 4 { + if t1 <= 2*Eta { + p[i] = common.Q + Eta - t1 + i++ + } + if t2 <= 2*Eta && i < common.N { + p[i] = common.Q + Eta - t2 + i++ + } + } else { + panic("unsupported η") + } + } + } + + var iv [64 + 2]byte // 64 byte seed + uint16 nonce + + h := sha3.NewShake256() + copy(iv[:64], seed[:]) + iv[64] = uint8(nonce) + iv[65] = uint8(nonce >> 8) + + // 136 is SHAKE-256 rate + _, _ = h.Write(iv[:]) + + for i < common.N { + _, _ = h.Read(buf[:136]) + sample() + } +} + +// Sample v[i] uniformly with coefficients in (-γ₁,…,γ₁] using the +// given seed and nonce+i +// +// p will be normalized. +func VecLDeriveUniformLeGamma1(v *VecL, seed *[64]byte, nonce uint16) { + for i := 0; i < L; i++ { + PolyDeriveUniformLeGamma1(&v[i], seed, nonce+uint16(i)) + } +} + +// Sample p uniformly with coefficients in (-γ₁,…,γK1s] using the +// given seed and nonce. +// +// p will be normalized. +func PolyDeriveUniformLeGamma1(p *common.Poly, seed *[64]byte, nonce uint16) { + var buf [PolyLeGamma1Size]byte + + var iv [66]byte + h := sha3.NewShake256() + copy(iv[:64], seed[:]) + iv[64] = uint8(nonce) + iv[65] = uint8(nonce >> 8) + _, _ = h.Write(iv[:]) + _, _ = h.Read(buf[:]) + + PolyUnpackLeGamma1(p, buf[:]) +} + +// For each i, sample ps[i] uniformly with τ non-zero coefficients in {q-1,1} +// using the given seed and w1[i]. ps[i] may be nil and is ignored +// in that case. ps[i] will be normalized. +// +// Can only be called when DeriveX4Available is true. +// +// This function is currently not used (yet). +func PolyDeriveUniformBallX4(ps [4]*common.Poly, seed []byte) { + var perm keccakf1600.StateX4 + state := perm.Initialize(false) + + // Absorb the seed in the four states + for i := 0; i < CTildeSize/8; i++ { + v := binary.LittleEndian.Uint64(seed[8*i : 8*(i+1)]) + for j := 0; j < 4; j++ { + state[i*4+j] = v + } + } + + // SHAKE256 domain separator and padding + for j := 0; j < 4; j++ { + state[(CTildeSize/8)*4+j] ^= 0x1f + state[16*4+j] ^= 0x80 << 56 + } + perm.Permute() + + var signs [4]uint64 + var idx [4]uint16 // indices into ps + + for j := 0; j < 4; j++ { + if ps[j] != nil { + signs[j] = state[j] + *ps[j] = common.Poly{} // zero ps[j] + idx[j] = common.N - Tau + } else { + idx[j] = common.N // mark as completed + } + } + + stateOffset := 1 + for { + done := true + + PolyLoop: + for j := 0; j < 4; j++ { + if idx[j] == common.N { + continue + } + + for i := stateOffset; i < 17; i++ { + var bs [8]byte + binary.LittleEndian.PutUint64(bs[:], state[4*i+j]) + for k := 0; k < 8; k++ { + b := uint16(bs[k]) + + if b > idx[j] { + continue + } + + ps[j][idx[j]] = ps[j][b] + ps[j][b] = 1 + // Takes least significant bit of signs and uses it for the sign. + // Note 1 ^ (1 | (Q-1)) = Q-1. + ps[j][b] ^= uint32((-(signs[j] & 1)) & (1 | (common.Q - 1))) + signs[j] >>= 1 + + idx[j]++ + if idx[j] == common.N { + continue PolyLoop + } + } + } + + done = false + } + + if done { + break + } + + perm.Permute() + stateOffset = 0 + } +} + +// Samples p uniformly with τ non-zero coefficients in {q-1,1}. +// +// The polynomial p will be normalized. +func PolyDeriveUniformBall(p *common.Poly, seed []byte) { + var buf [136]byte // SHAKE-256 rate is 136 + + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + _, _ = h.Read(buf[:]) + + // Essentially we generate a sequence of τ ones or minus ones, + // prepend 196 zeroes and shuffle the concatenation using the + // usual algorithm (Fisher--Yates.) + signs := binary.LittleEndian.Uint64(buf[:]) + bufOff := 8 // offset into buf + + *p = common.Poly{} // zero p + for i := uint16(common.N - Tau); i < common.N; i++ { + var b uint16 + + // Find location of where to move the new coefficient to using + // rejection sampling. + for { + if bufOff >= 136 { + _, _ = h.Read(buf[:]) + bufOff = 0 + } + + b = uint16(buf[bufOff]) + bufOff++ + + if b <= i { + break + } + } + + p[i] = p[b] + p[b] = 1 + // Takes least significant bit of signs and uses it for the sign. + // Note 1 ^ (1 | (Q-1)) = Q-1. + p[b] ^= uint32((-(signs & 1)) & (1 | (common.Q - 1))) + signs >>= 1 + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/vec.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/vec.go new file mode 100644 index 0000000..5817acb --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode3/internal/vec.go @@ -0,0 +1,279 @@ +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// A vector of L polynomials. +type VecL [L]common.Poly + +// A vector of K polynomials. +type VecK [K]common.Poly + +// Normalize the polynomials in this vector. +func (v *VecL) Normalize() { + for i := 0; i < L; i++ { + v[i].Normalize() + } +} + +// Normalize the polynomials in this vector assuming their coefficients +// are already bounded by 2q. +func (v *VecL) NormalizeAssumingLe2Q() { + for i := 0; i < L; i++ { + v[i].NormalizeAssumingLe2Q() + } +} + +// Sets v to w + u. Does not normalize. +func (v *VecL) Add(w, u *VecL) { + for i := 0; i < L; i++ { + v[i].Add(&w[i], &u[i]) + } +} + +// Applies NTT componentwise. See Poly.NTT() for details. +func (v *VecL) NTT() { + for i := 0; i < L; i++ { + v[i].NTT() + } +} + +// Checks whether any of the coefficients exceeds the given bound in supnorm +// +// Requires the vector to be normalized. +func (v *VecL) Exceeds(bound uint32) bool { + for i := 0; i < L; i++ { + if v[i].Exceeds(bound) { + return true + } + } + return false +} + +// Applies Poly.Power2Round componentwise. +// +// Requires the vector to be normalized. +func (v *VecL) Power2Round(v0PlusQ, v1 *VecL) { + for i := 0; i < L; i++ { + v[i].Power2Round(&v0PlusQ[i], &v1[i]) + } +} + +// Applies Poly.Decompose componentwise. +// +// Requires the vector to be normalized. +func (v *VecL) Decompose(v0PlusQ, v1 *VecL) { + for i := 0; i < L; i++ { + PolyDecompose(&v[i], &v0PlusQ[i], &v1[i]) + } +} + +// Sequentially packs each polynomial using Poly.PackLeqEta(). +func (v *VecL) PackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyPackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sets v to the polynomials packed in buf using VecL.PackLeqEta(). +func (v *VecL) UnpackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyUnpackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sequentially packs each polynomial using PolyPackLeGamma1(). +func (v *VecL) PackLeGamma1(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyPackLeGamma1(&v[i], buf[offset:]) + offset += PolyLeGamma1Size + } +} + +// Sets v to the polynomials packed in buf using VecL.PackLeGamma1(). +func (v *VecL) UnpackLeGamma1(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyUnpackLeGamma1(&v[i], buf[offset:]) + offset += PolyLeGamma1Size + } +} + +// Normalize the polynomials in this vector. +func (v *VecK) Normalize() { + for i := 0; i < K; i++ { + v[i].Normalize() + } +} + +// Normalize the polynomials in this vector assuming their coefficients +// are already bounded by 2q. +func (v *VecK) NormalizeAssumingLe2Q() { + for i := 0; i < K; i++ { + v[i].NormalizeAssumingLe2Q() + } +} + +// Sets v to w + u. Does not normalize. +func (v *VecK) Add(w, u *VecK) { + for i := 0; i < K; i++ { + v[i].Add(&w[i], &u[i]) + } +} + +// Checks whether any of the coefficients exceeds the given bound in supnorm +// +// Requires the vector to be normalized. +func (v *VecK) Exceeds(bound uint32) bool { + for i := 0; i < K; i++ { + if v[i].Exceeds(bound) { + return true + } + } + return false +} + +// Applies Poly.Power2Round componentwise. +// +// Requires the vector to be normalized. +func (v *VecK) Power2Round(v0PlusQ, v1 *VecK) { + for i := 0; i < K; i++ { + v[i].Power2Round(&v0PlusQ[i], &v1[i]) + } +} + +// Applies Poly.Decompose componentwise. +// +// Requires the vector to be normalized. +func (v *VecK) Decompose(v0PlusQ, v1 *VecK) { + for i := 0; i < K; i++ { + PolyDecompose(&v[i], &v0PlusQ[i], &v1[i]) + } +} + +// Sets v to the hint vector for v0 the modified low bits and v1 +// the unmodified high bits --- see makeHint(). +// +// Returns the number of ones in the hint vector. +func (v *VecK) MakeHint(v0, v1 *VecK) (pop uint32) { + for i := 0; i < K; i++ { + pop += PolyMakeHint(&v[i], &v0[i], &v1[i]) + } + return +} + +// Computes corrections to the high bits of the polynomials in the vector +// w using the hints in h and sets v to the corrected high bits. Returns v. +// See useHint(). +func (v *VecK) UseHint(q, hint *VecK) *VecK { + for i := 0; i < K; i++ { + PolyUseHint(&v[i], &q[i], &hint[i]) + } + return v +} + +// Sequentially packs each polynomial using Poly.PackT1(). +func (v *VecK) PackT1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].PackT1(buf[offset:]) + offset += common.PolyT1Size + } +} + +// Sets v to the vector packed into buf by PackT1(). +func (v *VecK) UnpackT1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].UnpackT1(buf[offset:]) + offset += common.PolyT1Size + } +} + +// Sequentially packs each polynomial using Poly.PackT0(). +func (v *VecK) PackT0(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].PackT0(buf[offset:]) + offset += common.PolyT0Size + } +} + +// Sets v to the vector packed into buf by PackT0(). +func (v *VecK) UnpackT0(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].UnpackT0(buf[offset:]) + offset += common.PolyT0Size + } +} + +// Sequentially packs each polynomial using Poly.PackLeqEta(). +func (v *VecK) PackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyPackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sets v to the polynomials packed in buf using VecK.PackLeqEta(). +func (v *VecK) UnpackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyUnpackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Applies NTT componentwise. See Poly.NTT() for details. +func (v *VecK) NTT() { + for i := 0; i < K; i++ { + v[i].NTT() + } +} + +// Sequentially packs each polynomial using PolyPackW1(). +func (v *VecK) PackW1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyPackW1(&v[i], buf[offset:]) + offset += PolyW1Size + } +} + +// Sets v to a - b. +// +// Warning: assumes coefficients of the polynomials of b are less than 2q. +func (v *VecK) Sub(a, b *VecK) { + for i := 0; i < K; i++ { + v[i].Sub(&a[i], &b[i]) + } +} + +// Sets v to 2ᵈ w without reducing. +func (v *VecK) MulBy2toD(w *VecK) { + for i := 0; i < K; i++ { + v[i].MulBy2toD(&w[i]) + } +} + +// Applies InvNTT componentwise. See Poly.InvNTT() for details. +func (v *VecK) InvNTT() { + for i := 0; i < K; i++ { + v[i].InvNTT() + } +} + +// Applies Poly.ReduceLe2Q() componentwise. +func (v *VecK) ReduceLe2Q() { + for i := 0; i < K; i++ { + v[i].ReduceLe2Q() + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/dilithium.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/dilithium.go new file mode 100644 index 0000000..3058692 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/dilithium.go @@ -0,0 +1,295 @@ +// Code generated from pkg.templ.go. DO NOT EDIT. + +// mode5 implements the CRYSTALS-Dilithium signature scheme Dilithium5 +// as submitted to round3 of the NIST PQC competition and described in +// +// https://pq-crystals.org/dilithium/data/dilithium-specification-round3-20210208.pdf +package mode5 + +import ( + "crypto" + "errors" + "io" + + "github.com/cloudflare/circl/sign" + "github.com/cloudflare/circl/sign/dilithium/mode5/internal" + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +const ( + // Size of seed for NewKeyFromSeed + SeedSize = common.SeedSize + + // Size of a packed PublicKey + PublicKeySize = internal.PublicKeySize + + // Size of a packed PrivateKey + PrivateKeySize = internal.PrivateKeySize + + // Size of a signature + SignatureSize = internal.SignatureSize +) + +// PublicKey is the type of Dilithium5 public key +type PublicKey internal.PublicKey + +// PrivateKey is the type of Dilithium5 private key +type PrivateKey internal.PrivateKey + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error) { + pk, sk, err := internal.GenerateKey(rand) + return (*PublicKey)(pk), (*PrivateKey)(sk), err +} + +// NewKeyFromSeed derives a public/private key pair using the given seed. +func NewKeyFromSeed(seed *[SeedSize]byte) (*PublicKey, *PrivateKey) { + pk, sk := internal.NewKeyFromSeed(seed) + return (*PublicKey)(pk), (*PrivateKey)(sk) +} + +// SignTo signs the given message and writes the signature into signature. +// It will panic if signature is not of length at least SignatureSize. +func SignTo(sk *PrivateKey, msg, sig []byte) { + var rnd [32]byte + + internal.SignTo( + (*internal.PrivateKey)(sk), + func(w io.Writer) { + w.Write(msg) + }, + rnd, + sig, + ) +} + +// Verify checks whether the given signature by pk on msg is valid. +func Verify(pk *PublicKey, msg, sig []byte) bool { + return internal.Verify( + (*internal.PublicKey)(pk), + func(w io.Writer) { + _, _ = w.Write(msg) + }, + sig, + ) +} + +// Sets pk to the public key encoded in buf. +func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte) { + (*internal.PublicKey)(pk).Unpack(buf) +} + +// Sets sk to the private key encoded in buf. +func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte) { + (*internal.PrivateKey)(sk).Unpack(buf) +} + +// Packs the public key into buf. +func (pk *PublicKey) Pack(buf *[PublicKeySize]byte) { + (*internal.PublicKey)(pk).Pack(buf) +} + +// Packs the private key into buf. +func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte) { + (*internal.PrivateKey)(sk).Pack(buf) +} + +// Packs the public key. +func (pk *PublicKey) Bytes() []byte { + var buf [PublicKeySize]byte + pk.Pack(&buf) + return buf[:] +} + +// Packs the private key. +func (sk *PrivateKey) Bytes() []byte { + var buf [PrivateKeySize]byte + sk.Pack(&buf) + return buf[:] +} + +// Packs the public key. +func (pk *PublicKey) MarshalBinary() ([]byte, error) { + return pk.Bytes(), nil +} + +// Packs the private key. +func (sk *PrivateKey) MarshalBinary() ([]byte, error) { + return sk.Bytes(), nil +} + +// Unpacks the public key from data. +func (pk *PublicKey) UnmarshalBinary(data []byte) error { + if len(data) != PublicKeySize { + return errors.New("packed public key must be of mode5.PublicKeySize bytes") + } + var buf [PublicKeySize]byte + copy(buf[:], data) + pk.Unpack(&buf) + return nil +} + +// Unpacks the private key from data. +func (sk *PrivateKey) UnmarshalBinary(data []byte) error { + if len(data) != PrivateKeySize { + return errors.New("packed private key must be of mode5.PrivateKeySize bytes") + } + var buf [PrivateKeySize]byte + copy(buf[:], data) + sk.Unpack(&buf) + return nil +} + +// Sign signs the given message. +// +// opts.HashFunc() must return zero, which can be achieved by passing +// crypto.Hash(0) for opts. rand is ignored. Will only return an error +// if opts.HashFunc() is non-zero. +// +// This function is used to make PrivateKey implement the crypto.Signer +// interface. The package-level SignTo function might be more convenient +// to use. +func (sk *PrivateKey) Sign(rand io.Reader, msg []byte, opts crypto.SignerOpts) ( + sig []byte, err error) { + var ret [SignatureSize]byte + + if opts.HashFunc() != crypto.Hash(0) { + return nil, errors.New("dilithium: cannot sign hashed message") + } + SignTo(sk, msg, ret[:]) + + return ret[:], nil +} + +// Computes the public key corresponding to this private key. +// +// Returns a *PublicKey. The type crypto.PublicKey is used to make +// PrivateKey implement the crypto.Signer interface. +func (sk *PrivateKey) Public() crypto.PublicKey { + return (*PublicKey)((*internal.PrivateKey)(sk).Public()) +} + +// Equal returns whether the two private keys equal. +func (sk *PrivateKey) Equal(other crypto.PrivateKey) bool { + castOther, ok := other.(*PrivateKey) + if !ok { + return false + } + return (*internal.PrivateKey)(sk).Equal((*internal.PrivateKey)(castOther)) +} + +// Equal returns whether the two public keys equal. +func (pk *PublicKey) Equal(other crypto.PublicKey) bool { + castOther, ok := other.(*PublicKey) + if !ok { + return false + } + return (*internal.PublicKey)(pk).Equal((*internal.PublicKey)(castOther)) +} + +// Boilerplate for generic signatures API + +type scheme struct{} + +var sch sign.Scheme = &scheme{} + +// Scheme returns a generic signature interface for Dilithium5. +func Scheme() sign.Scheme { return sch } + +func (*scheme) Name() string { return "Dilithium5" } +func (*scheme) PublicKeySize() int { return PublicKeySize } +func (*scheme) PrivateKeySize() int { return PrivateKeySize } +func (*scheme) SignatureSize() int { return SignatureSize } +func (*scheme) SeedSize() int { return SeedSize } + +// TODO TLSIdentifier() + +func (*scheme) SupportsContext() bool { + return false +} + +func (*scheme) GenerateKey() (sign.PublicKey, sign.PrivateKey, error) { + return GenerateKey(nil) +} + +func (*scheme) Sign( + sk sign.PrivateKey, + msg []byte, + opts *sign.SignatureOpts, +) []byte { + sig := make([]byte, SignatureSize) + + priv, ok := sk.(*PrivateKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + panic(sign.ErrContextNotSupported) + } + SignTo(priv, msg, sig) + + return sig +} + +func (*scheme) Verify( + pk sign.PublicKey, + msg, sig []byte, + opts *sign.SignatureOpts, +) bool { + pub, ok := pk.(*PublicKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + panic(sign.ErrContextNotSupported) + } + return Verify(pub, msg, sig) +} + +func (*scheme) DeriveKey(seed []byte) (sign.PublicKey, sign.PrivateKey) { + if len(seed) != SeedSize { + panic(sign.ErrSeedSize) + } + var seed2 [SeedSize]byte + copy(seed2[:], seed) + return NewKeyFromSeed(&seed2) +} + +func (*scheme) UnmarshalBinaryPublicKey(buf []byte) (sign.PublicKey, error) { + if len(buf) != PublicKeySize { + return nil, sign.ErrPubKeySize + } + + var ( + buf2 [PublicKeySize]byte + ret PublicKey + ) + + copy(buf2[:], buf) + ret.Unpack(&buf2) + return &ret, nil +} + +func (*scheme) UnmarshalBinaryPrivateKey(buf []byte) (sign.PrivateKey, error) { + if len(buf) != PrivateKeySize { + return nil, sign.ErrPrivKeySize + } + + var ( + buf2 [PrivateKeySize]byte + ret PrivateKey + ) + + copy(buf2[:], buf) + ret.Unpack(&buf2) + return &ret, nil +} + +func (sk *PrivateKey) Scheme() sign.Scheme { + return sch +} + +func (sk *PublicKey) Scheme() sign.Scheme { + return sch +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/dilithium.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/dilithium.go new file mode 100644 index 0000000..8f1c8e5 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/dilithium.go @@ -0,0 +1,491 @@ +// Code generated from mode3/internal/dilithium.go by gen.go + +package internal + +import ( + cryptoRand "crypto/rand" + "crypto/subtle" + "io" + + "github.com/cloudflare/circl/internal/sha3" + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +const ( + // Size of a packed polynomial of norm ≤η. + // (Note that the formula is not valid in general.) + PolyLeqEtaSize = (common.N * DoubleEtaBits) / 8 + + // β = τη, the maximum size of c s₂. + Beta = Tau * Eta + + // γ₁ range of y + Gamma1 = 1 << Gamma1Bits + + // Size of packed polynomial of norm <γ₁ such as z + PolyLeGamma1Size = (Gamma1Bits + 1) * common.N / 8 + + // α = 2γ₂ parameter for decompose + Alpha = 2 * Gamma2 + + // Size of a packed private key + PrivateKeySize = 32 + 32 + TRSize + PolyLeqEtaSize*(L+K) + common.PolyT0Size*K + + // Size of a packed public key + PublicKeySize = 32 + common.PolyT1Size*K + + // Size of a packed signature + SignatureSize = L*PolyLeGamma1Size + Omega + K + CTildeSize + + // Size of packed w₁ + PolyW1Size = (common.N * (common.QBits - Gamma1Bits)) / 8 +) + +// PublicKey is the type of Dilithium public keys. +type PublicKey struct { + rho [32]byte + t1 VecK + + // Cached values + t1p [common.PolyT1Size * K]byte + A *Mat + tr *[TRSize]byte +} + +// PrivateKey is the type of Dilithium private keys. +type PrivateKey struct { + rho [32]byte + key [32]byte + s1 VecL + s2 VecK + t0 VecK + tr [TRSize]byte + + // Cached values + A Mat // ExpandA(ρ) + s1h VecL // NTT(s₁) + s2h VecK // NTT(s₂) + t0h VecK // NTT(t₀) +} + +type unpackedSignature struct { + z VecL + hint VecK + c [CTildeSize]byte +} + +// Packs the signature into buf. +func (sig *unpackedSignature) Pack(buf []byte) { + copy(buf[:], sig.c[:]) + sig.z.PackLeGamma1(buf[CTildeSize:]) + sig.hint.PackHint(buf[CTildeSize+L*PolyLeGamma1Size:]) +} + +// Sets sig to the signature encoded in the buffer. +// +// Returns whether buf contains a properly packed signature. +func (sig *unpackedSignature) Unpack(buf []byte) bool { + if len(buf) < SignatureSize { + return false + } + copy(sig.c[:], buf[:]) + sig.z.UnpackLeGamma1(buf[CTildeSize:]) + if sig.z.Exceeds(Gamma1 - Beta) { + return false + } + if !sig.hint.UnpackHint(buf[CTildeSize+L*PolyLeGamma1Size:]) { + return false + } + return true +} + +// Packs the public key into buf. +func (pk *PublicKey) Pack(buf *[PublicKeySize]byte) { + copy(buf[:32], pk.rho[:]) + copy(buf[32:], pk.t1p[:]) +} + +// Sets pk to the public key encoded in buf. +func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte) { + copy(pk.rho[:], buf[:32]) + copy(pk.t1p[:], buf[32:]) + + pk.t1.UnpackT1(pk.t1p[:]) + pk.A = new(Mat) + pk.A.Derive(&pk.rho) + + // tr = CRH(ρ ‖ t1) = CRH(pk) + pk.tr = new([TRSize]byte) + h := sha3.NewShake256() + _, _ = h.Write(buf[:]) + _, _ = h.Read(pk.tr[:]) +} + +// Packs the private key into buf. +func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte) { + copy(buf[:32], sk.rho[:]) + copy(buf[32:64], sk.key[:]) + copy(buf[64:64+TRSize], sk.tr[:]) + offset := 64 + TRSize + sk.s1.PackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * L + sk.s2.PackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * K + sk.t0.PackT0(buf[offset:]) +} + +// Sets sk to the private key encoded in buf. +func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte) { + copy(sk.rho[:], buf[:32]) + copy(sk.key[:], buf[32:64]) + copy(sk.tr[:], buf[64:64+TRSize]) + offset := 64 + TRSize + sk.s1.UnpackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * L + sk.s2.UnpackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * K + sk.t0.UnpackT0(buf[offset:]) + + // Cached values + sk.A.Derive(&sk.rho) + sk.t0h = sk.t0 + sk.t0h.NTT() + sk.s1h = sk.s1 + sk.s1h.NTT() + sk.s2h = sk.s2 + sk.s2h.NTT() +} + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error) { + var seed [32]byte + if rand == nil { + rand = cryptoRand.Reader + } + _, err := io.ReadFull(rand, seed[:]) + if err != nil { + return nil, nil, err + } + pk, sk := NewKeyFromSeed(&seed) + return pk, sk, nil +} + +// NewKeyFromSeed derives a public/private key pair using the given seed. +func NewKeyFromSeed(seed *[common.SeedSize]byte) (*PublicKey, *PrivateKey) { + var eSeed [128]byte // expanded seed + var pk PublicKey + var sk PrivateKey + var sSeed [64]byte + + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + + if NIST { + _, _ = h.Write([]byte{byte(K), byte(L)}) + } + + _, _ = h.Read(eSeed[:]) + + copy(pk.rho[:], eSeed[:32]) + copy(sSeed[:], eSeed[32:96]) + copy(sk.key[:], eSeed[96:]) + copy(sk.rho[:], pk.rho[:]) + + sk.A.Derive(&pk.rho) + + for i := uint16(0); i < L; i++ { + PolyDeriveUniformLeqEta(&sk.s1[i], &sSeed, i) + } + + for i := uint16(0); i < K; i++ { + PolyDeriveUniformLeqEta(&sk.s2[i], &sSeed, i+L) + } + + sk.s1h = sk.s1 + sk.s1h.NTT() + sk.s2h = sk.s2 + sk.s2h.NTT() + + sk.computeT0andT1(&sk.t0, &pk.t1) + + sk.t0h = sk.t0 + sk.t0h.NTT() + + // Complete public key far enough to be packed + pk.t1.PackT1(pk.t1p[:]) + pk.A = &sk.A + + // Finish private key + var packedPk [PublicKeySize]byte + pk.Pack(&packedPk) + + // tr = CRH(ρ ‖ t1) = CRH(pk) + h.Reset() + _, _ = h.Write(packedPk[:]) + _, _ = h.Read(sk.tr[:]) + + // Finish cache of public key + pk.tr = &sk.tr + + return &pk, &sk +} + +// Computes t0 and t1 from sk.s1h, sk.s2 and sk.A. +func (sk *PrivateKey) computeT0andT1(t0, t1 *VecK) { + var t VecK + + // Set t to A s₁ + s₂ + for i := 0; i < K; i++ { + PolyDotHat(&t[i], &sk.A[i], &sk.s1h) + t[i].ReduceLe2Q() + t[i].InvNTT() + } + t.Add(&t, &sk.s2) + t.Normalize() + + // Compute t₀, t₁ = Power2Round(t) + t.Power2Round(t0, t1) +} + +// Verify checks whether the given signature by pk on msg is valid. +// +// For Dilithium this is the top-level verification function. +// In ML-DSA, this is ML-DSA.Verify_internal. +func Verify(pk *PublicKey, msg func(io.Writer), signature []byte) bool { + var sig unpackedSignature + var mu [64]byte + var zh VecL + var Az, Az2dct1, w1 VecK + var ch common.Poly + var cp [CTildeSize]byte + var w1Packed [PolyW1Size * K]byte + + // Note that Unpack() checked whether ‖z‖_∞ < γ₁ - β + // and ensured that there at most ω ones in pk.hint. + if !sig.Unpack(signature) { + return false + } + + // μ = CRH(tr ‖ msg) + h := sha3.NewShake256() + _, _ = h.Write(pk.tr[:]) + msg(&h) + _, _ = h.Read(mu[:]) + + // Compute Az + zh = sig.z + zh.NTT() + + for i := 0; i < K; i++ { + PolyDotHat(&Az[i], &pk.A[i], &zh) + } + + // Next, we compute Az - 2ᵈ·c·t₁. + // Note that the coefficients of t₁ are bounded by 256 = 2⁹, + // so the coefficients of Az2dct1 will bounded by 2⁹⁺ᵈ = 2²³ < 2q, + // which is small enough for NTT(). + Az2dct1.MulBy2toD(&pk.t1) + Az2dct1.NTT() + PolyDeriveUniformBall(&ch, sig.c[:]) + ch.NTT() + for i := 0; i < K; i++ { + Az2dct1[i].MulHat(&Az2dct1[i], &ch) + } + Az2dct1.Sub(&Az, &Az2dct1) + Az2dct1.ReduceLe2Q() + Az2dct1.InvNTT() + Az2dct1.NormalizeAssumingLe2Q() + + // UseHint(pk.hint, Az - 2ᵈ·c·t₁) + // = UseHint(pk.hint, w - c·s₂ + c·t₀) + // = UseHint(pk.hint, r + c·t₀) + // = r₁ = w₁. + w1.UseHint(&Az2dct1, &sig.hint) + w1.PackW1(w1Packed[:]) + + // c' = H(μ, w₁) + h.Reset() + _, _ = h.Write(mu[:]) + _, _ = h.Write(w1Packed[:]) + _, _ = h.Read(cp[:]) + + return sig.c == cp +} + +// SignTo signs the given message and writes the signature into signature. +// +// For Dilithium this is the top-level signing function. For ML-DSA +// this is ML-DSA.Sign_internal. +// +//nolint:funlen +func SignTo(sk *PrivateKey, msg func(io.Writer), rnd [32]byte, signature []byte) { + var mu, rhop [64]byte + var w1Packed [PolyW1Size * K]byte + var y, yh VecL + var w, w0, w1, w0mcs2, ct0, w0mcs2pct0 VecK + var ch common.Poly + var yNonce uint16 + var sig unpackedSignature + + if len(signature) < SignatureSize { + panic("Signature does not fit in that byteslice") + } + + // μ = CRH(tr ‖ msg) + h := sha3.NewShake256() + _, _ = h.Write(sk.tr[:]) + msg(&h) + _, _ = h.Read(mu[:]) + + // ρ' = CRH(key ‖ μ) + h.Reset() + _, _ = h.Write(sk.key[:]) + if NIST { + _, _ = h.Write(rnd[:]) + } + _, _ = h.Write(mu[:]) + _, _ = h.Read(rhop[:]) + + // Main rejection loop + attempt := 0 + for { + attempt++ + if attempt >= 576 { + // Depending on the mode, one try has a chance between 1/7 and 1/4 + // of succeeding. Thus it is safe to say that 576 iterations + // are enough as (6/7)⁵⁷⁶ < 2⁻¹²⁸. + panic("This should only happen 1 in 2^{128}: something is wrong.") + } + + // y = ExpandMask(ρ', key) + VecLDeriveUniformLeGamma1(&y, &rhop, yNonce) + yNonce += uint16(L) + + // Set w to A y + yh = y + yh.NTT() + for i := 0; i < K; i++ { + PolyDotHat(&w[i], &sk.A[i], &yh) + w[i].ReduceLe2Q() + w[i].InvNTT() + } + + // Decompose w into w₀ and w₁ + w.NormalizeAssumingLe2Q() + w.Decompose(&w0, &w1) + + // c~ = H(μ ‖ w₁) + w1.PackW1(w1Packed[:]) + h.Reset() + _, _ = h.Write(mu[:]) + _, _ = h.Write(w1Packed[:]) + _, _ = h.Read(sig.c[:]) + + PolyDeriveUniformBall(&ch, sig.c[:]) + ch.NTT() + + // Ensure ‖ w₀ - c·s2 ‖_∞ < γ₂ - β. + // + // By Lemma 3 of the specification this is equivalent to checking that + // both ‖ r₀ ‖_∞ < γ₂ - β and r₁ = w₁, for the decomposition + // w - c·s₂ = r₁ α + r₀ as computed by decompose(). + // See also §4.1 of the specification. + for i := 0; i < K; i++ { + w0mcs2[i].MulHat(&ch, &sk.s2h[i]) + w0mcs2[i].InvNTT() + } + w0mcs2.Sub(&w0, &w0mcs2) + w0mcs2.Normalize() + + if w0mcs2.Exceeds(Gamma2 - Beta) { + continue + } + + // z = y + c·s₁ + for i := 0; i < L; i++ { + sig.z[i].MulHat(&ch, &sk.s1h[i]) + sig.z[i].InvNTT() + } + sig.z.Add(&sig.z, &y) + sig.z.Normalize() + + // Ensure ‖z‖_∞ < γ₁ - β + if sig.z.Exceeds(Gamma1 - Beta) { + continue + } + + // Compute c·t₀ + for i := 0; i < K; i++ { + ct0[i].MulHat(&ch, &sk.t0h[i]) + ct0[i].InvNTT() + } + ct0.NormalizeAssumingLe2Q() + + // Ensure ‖c·t₀‖_∞ < γ₂. + if ct0.Exceeds(Gamma2) { + continue + } + + // Create the hint to be able to reconstruct w₁ from w - c·s₂ + c·t0. + // Note that we're not using makeHint() in the obvious way as we + // do not know whether ‖ sc·s₂ - c·t₀ ‖_∞ < γ₂. Instead we note + // that our makeHint() is actually the same as a makeHint for a + // different decomposition: + // + // Earlier we ensured indirectly with a check that r₁ = w₁ where + // r = w - c·s₂. Hence r₀ = r - r₁ α = w - c·s₂ - w₁ α = w₀ - c·s₂. + // Thus MakeHint(w₀ - c·s₂ + c·t₀, w₁) = MakeHint(r0 + c·t₀, r₁) + // and UseHint(w - c·s₂ + c·t₀, w₁) = UseHint(r + c·t₀, r₁). + // As we just ensured that ‖ c·t₀ ‖_∞ < γ₂ our usage is correct. + w0mcs2pct0.Add(&w0mcs2, &ct0) + w0mcs2pct0.NormalizeAssumingLe2Q() + hintPop := sig.hint.MakeHint(&w0mcs2pct0, &w1) + if hintPop > Omega { + continue + } + + break + } + + sig.Pack(signature[:]) +} + +// Computes the public key corresponding to this private key. +func (sk *PrivateKey) Public() *PublicKey { + var t0 VecK + pk := &PublicKey{ + rho: sk.rho, + A: &sk.A, + tr: &sk.tr, + } + sk.computeT0andT1(&t0, &pk.t1) + pk.t1.PackT1(pk.t1p[:]) + return pk +} + +// Equal returns whether the two public keys are equal +func (pk *PublicKey) Equal(other *PublicKey) bool { + return pk.rho == other.rho && pk.t1 == other.t1 +} + +// Equal returns whether the two private keys are equal +func (sk *PrivateKey) Equal(other *PrivateKey) bool { + ret := (subtle.ConstantTimeCompare(sk.rho[:], other.rho[:]) & + subtle.ConstantTimeCompare(sk.key[:], other.key[:]) & + subtle.ConstantTimeCompare(sk.tr[:], other.tr[:])) + + acc := uint32(0) + for i := 0; i < L; i++ { + for j := 0; j < common.N; j++ { + acc |= sk.s1[i][j] ^ other.s1[i][j] + } + } + for i := 0; i < K; i++ { + for j := 0; j < common.N; j++ { + acc |= sk.s2[i][j] ^ other.s2[i][j] + acc |= sk.t0[i][j] ^ other.t0[i][j] + } + } + return (ret & subtle.ConstantTimeEq(int32(acc), 0)) == 1 +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/mat.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/mat.go new file mode 100644 index 0000000..ceaf634 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/mat.go @@ -0,0 +1,59 @@ +// Code generated from mode3/internal/mat.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// A k by l matrix of polynomials. +type Mat [K]VecL + +// Expands the given seed to a complete matrix. +// +// This function is called ExpandA in the specification. +func (m *Mat) Derive(seed *[32]byte) { + if !DeriveX4Available { + for i := uint16(0); i < K; i++ { + for j := uint16(0); j < L; j++ { + PolyDeriveUniform(&m[i][j], seed, (i<<8)+j) + } + } + return + } + + idx := 0 + var nonces [4]uint16 + var ps [4]*common.Poly + for i := uint16(0); i < K; i++ { + for j := uint16(0); j < L; j++ { + nonces[idx] = (i << 8) + j + ps[idx] = &m[i][j] + idx++ + if idx == 4 { + idx = 0 + PolyDeriveUniformX4(ps, seed, nonces) + } + } + } + if idx != 0 { + for i := idx; i < 4; i++ { + ps[i] = nil + } + PolyDeriveUniformX4(ps, seed, nonces) + } +} + +// Set p to the inner product of a and b using pointwise multiplication. +// +// Assumes a and b are in Montgomery form and their coefficients are +// pairwise sufficiently small to multiply, see Poly.MulHat(). Resulting +// coefficients are bounded by 2Lq. +func PolyDotHat(p *common.Poly, a, b *VecL) { + var t common.Poly + *p = common.Poly{} // zero p + for i := 0; i < L; i++ { + t.MulHat(&a[i], &b[i]) + p.Add(&t, p) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/pack.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/pack.go new file mode 100644 index 0000000..1854b41 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/pack.go @@ -0,0 +1,270 @@ +// Code generated from mode3/internal/pack.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// Writes p with norm less than or equal η into buf, which must be of +// size PolyLeqEtaSize. +// +// Assumes coefficients of p are not normalized, but in [q-η,q+η]. +func PolyPackLeqEta(p *common.Poly, buf []byte) { + if DoubleEtaBits == 4 { // compiler eliminates branch + j := 0 + for i := 0; i < PolyLeqEtaSize; i++ { + buf[i] = (byte(common.Q+Eta-p[j]) | + byte(common.Q+Eta-p[j+1])<<4) + j += 2 + } + } else if DoubleEtaBits == 3 { + j := 0 + for i := 0; i < PolyLeqEtaSize; i += 3 { + buf[i] = (byte(common.Q+Eta-p[j]) | + (byte(common.Q+Eta-p[j+1]) << 3) | + (byte(common.Q+Eta-p[j+2]) << 6)) + buf[i+1] = ((byte(common.Q+Eta-p[j+2]) >> 2) | + (byte(common.Q+Eta-p[j+3]) << 1) | + (byte(common.Q+Eta-p[j+4]) << 4) | + (byte(common.Q+Eta-p[j+5]) << 7)) + buf[i+2] = ((byte(common.Q+Eta-p[j+5]) >> 1) | + (byte(common.Q+Eta-p[j+6]) << 2) | + (byte(common.Q+Eta-p[j+7]) << 5)) + j += 8 + } + } else { + panic("eta not supported") + } +} + +// Sets p to the polynomial of norm less than or equal η encoded in the +// given buffer of size PolyLeqEtaSize. +// +// Output coefficients of p are not normalized, but in [q-η,q+η] provided +// buf was created using PackLeqEta. +// +// Beware, for arbitrary buf the coefficients of p might end up in +// the interval [q-2^b,q+2^b] where b is the least b with η≤2^b. +func PolyUnpackLeqEta(p *common.Poly, buf []byte) { + if DoubleEtaBits == 4 { // compiler eliminates branch + j := 0 + for i := 0; i < PolyLeqEtaSize; i++ { + p[j] = common.Q + Eta - uint32(buf[i]&15) + p[j+1] = common.Q + Eta - uint32(buf[i]>>4) + j += 2 + } + } else if DoubleEtaBits == 3 { + j := 0 + for i := 0; i < PolyLeqEtaSize; i += 3 { + p[j] = common.Q + Eta - uint32(buf[i]&7) + p[j+1] = common.Q + Eta - uint32((buf[i]>>3)&7) + p[j+2] = common.Q + Eta - uint32((buf[i]>>6)|((buf[i+1]<<2)&7)) + p[j+3] = common.Q + Eta - uint32((buf[i+1]>>1)&7) + p[j+4] = common.Q + Eta - uint32((buf[i+1]>>4)&7) + p[j+5] = common.Q + Eta - uint32((buf[i+1]>>7)|((buf[i+2]<<1)&7)) + p[j+6] = common.Q + Eta - uint32((buf[i+2]>>2)&7) + p[j+7] = common.Q + Eta - uint32((buf[i+2]>>5)&7) + j += 8 + } + } else { + panic("eta not supported") + } +} + +// Writes v with coefficients in {0, 1} of which at most ω non-zero +// to buf, which must have length ω+k. +func (v *VecK) PackHint(buf []byte) { + // The packed hint starts with the indices of the non-zero coefficients + // For instance: + // + // (x⁵⁶ + x¹⁰⁰, x²⁵⁵, 0, x² + x²³, x¹) + // + // Yields + // + // 56, 100, 255, 2, 23, 1 + // + // Then we pad with zeroes until we have a list of ω items: + // // 56, 100, 255, 2, 23, 1, 0, 0, ..., 0 + // + // Then we finish with a list of the switch-over-indices in this + // list between polynomials, so: + // + // 56, 100, 255, 2, 23, 1, 0, 0, ..., 0, 2, 3, 3, 5, 6 + + off := uint8(0) + for i := 0; i < K; i++ { + for j := uint16(0); j < common.N; j++ { + if v[i][j] != 0 { + buf[off] = uint8(j) + off++ + } + } + buf[Omega+i] = off + } + for ; off < Omega; off++ { + buf[off] = 0 + } +} + +// Sets v to the vector encoded using VecK.PackHint() +// +// Returns whether unpacking was successful. +func (v *VecK) UnpackHint(buf []byte) bool { + // A priori, there would be several reasonable ways to encode the same + // hint vector. We take care to only allow only one encoding, to ensure + // "strong unforgeability". + // + // See PackHint() source for description of the encoding. + *v = VecK{} // zero v + prevSOP := uint8(0) // previous switch-over-point + for i := 0; i < K; i++ { + SOP := buf[Omega+i] + if SOP < prevSOP || SOP > Omega { + return false // ensures switch-over-points are increasing + } + for j := prevSOP; j < SOP; j++ { + if j > prevSOP && buf[j] <= buf[j-1] { + return false // ensures indices are increasing (within a poly) + } + v[i][buf[j]] = 1 + } + prevSOP = SOP + } + for j := prevSOP; j < Omega; j++ { + if buf[j] != 0 { + return false // ensures padding indices are zero + } + } + + return true +} + +// Sets p to the polynomial packed into buf by PolyPackLeGamma1. +// +// p will be normalized. +func PolyUnpackLeGamma1(p *common.Poly, buf []byte) { + if Gamma1Bits == 17 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 9 { + p0 := uint32(buf[i]) | (uint32(buf[i+1]) << 8) | + (uint32(buf[i+2]&0x3) << 16) + p1 := uint32(buf[i+2]>>2) | (uint32(buf[i+3]) << 6) | + (uint32(buf[i+4]&0xf) << 14) + p2 := uint32(buf[i+4]>>4) | (uint32(buf[i+5]) << 4) | + (uint32(buf[i+6]&0x3f) << 12) + p3 := uint32(buf[i+6]>>6) | (uint32(buf[i+7]) << 2) | + (uint32(buf[i+8]) << 10) + + // coefficients in [0,…,2γ₁) + p0 = Gamma1 - p0 // (-γ₁,…,γ₁] + p1 = Gamma1 - p1 + p2 = Gamma1 - p2 + p3 = Gamma1 - p3 + + p0 += uint32(int32(p0)>>31) & common.Q // normalize + p1 += uint32(int32(p1)>>31) & common.Q + p2 += uint32(int32(p2)>>31) & common.Q + p3 += uint32(int32(p3)>>31) & common.Q + + p[j] = p0 + p[j+1] = p1 + p[j+2] = p2 + p[j+3] = p3 + + j += 4 + } + } else if Gamma1Bits == 19 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 5 { + p0 := uint32(buf[i]) | (uint32(buf[i+1]) << 8) | + (uint32(buf[i+2]&0xf) << 16) + p1 := uint32(buf[i+2]>>4) | (uint32(buf[i+3]) << 4) | + (uint32(buf[i+4]) << 12) + + p0 = Gamma1 - p0 + p1 = Gamma1 - p1 + + p0 += uint32(int32(p0)>>31) & common.Q + p1 += uint32(int32(p1)>>31) & common.Q + + p[j] = p0 + p[j+1] = p1 + + j += 2 + } + } else { + panic("γ₁ not supported") + } +} + +// Writes p whose coefficients are in (-γ₁,γ₁] into buf +// which has to be of length PolyLeGamma1Size. +// +// Assumes p is normalized. +func PolyPackLeGamma1(p *common.Poly, buf []byte) { + if Gamma1Bits == 17 { + j := 0 + // coefficients in [0,…,γ₁] ∪ (q-γ₁,…,q) + for i := 0; i < PolyLeGamma1Size; i += 9 { + p0 := Gamma1 - p[j] // [0,…,γ₁] ∪ (γ₁-q,…,2γ₁-q) + p0 += uint32(int32(p0)>>31) & common.Q // [0,…,2γ₁) + p1 := Gamma1 - p[j+1] + p1 += uint32(int32(p1)>>31) & common.Q + p2 := Gamma1 - p[j+2] + p2 += uint32(int32(p2)>>31) & common.Q + p3 := Gamma1 - p[j+3] + p3 += uint32(int32(p3)>>31) & common.Q + + buf[i+0] = byte(p0) + buf[i+1] = byte(p0 >> 8) + buf[i+2] = byte(p0>>16) | byte(p1<<2) + buf[i+3] = byte(p1 >> 6) + buf[i+4] = byte(p1>>14) | byte(p2<<4) + buf[i+5] = byte(p2 >> 4) + buf[i+6] = byte(p2>>12) | byte(p3<<6) + buf[i+7] = byte(p3 >> 2) + buf[i+8] = byte(p3 >> 10) + + j += 4 + } + } else if Gamma1Bits == 19 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 5 { + // Coefficients are in [0, γ₁] ∪ (Q-γ₁, Q) + p0 := Gamma1 - p[j] + p0 += uint32(int32(p0)>>31) & common.Q + p1 := Gamma1 - p[j+1] + p1 += uint32(int32(p1)>>31) & common.Q + + buf[i+0] = byte(p0) + buf[i+1] = byte(p0 >> 8) + buf[i+2] = byte(p0>>16) | byte(p1<<4) + buf[i+3] = byte(p1 >> 4) + buf[i+4] = byte(p1 >> 12) + + j += 2 + } + } else { + panic("γ₁ not supported") + } +} + +// Pack w₁ into buf, which must be of length PolyW1Size. +// +// Assumes w₁ is normalized. +func PolyPackW1(p *common.Poly, buf []byte) { + if Gamma1Bits == 19 { + p.PackLe16(buf) + } else if Gamma1Bits == 17 { + j := 0 + for i := 0; i < PolyW1Size; i += 3 { + buf[i] = byte(p[j]) | byte(p[j+1]<<6) + buf[i+1] = byte(p[j+1]>>2) | byte(p[j+2]<<4) + buf[i+2] = byte(p[j+2]>>4) | byte(p[j+3]<<2) + j += 4 + } + } else { + panic("unsupported γ₁") + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/params.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/params.go new file mode 100644 index 0000000..6f65f03 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/params.go @@ -0,0 +1,18 @@ +// Code generated from params.templ.go. DO NOT EDIT. + +package internal + +const ( + Name = "Dilithium5" + K = 8 + L = 7 + Eta = 2 + DoubleEtaBits = 3 + Omega = 75 + Tau = 60 + Gamma1Bits = 19 + Gamma2 = 261888 + NIST = false + TRSize = 32 + CTildeSize = 32 +) diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/rounding.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/rounding.go new file mode 100644 index 0000000..58123c0 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/rounding.go @@ -0,0 +1,142 @@ +// Code generated from mode3/internal/rounding.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// Splits 0 ≤ a < q into a₀ and a₁ with a = a₁*α + a₀ with -α/2 < a₀ ≤ α/2, +// except for when we would have a₁ = (q-1)/α in which case a₁=0 is taken +// and -α/2 ≤ a₀ < 0. Returns a₀ + q. Note 0 ≤ a₁ < (q-1)/α. +// Recall α = 2γ₂. +func decompose(a uint32) (a0plusQ, a1 uint32) { + // a₁ = ⌈a / 128⌉ + a1 = (a + 127) >> 7 + + if Alpha == 523776 { + // 1025/2²² is close enough to 1/4092 so that a₁ + // becomes a/α rounded down. + a1 = ((a1*1025 + (1 << 21)) >> 22) + + // For the corner-case a₁ = (q-1)/α = 16, we have to set a₁=0. + a1 &= 15 + } else if Alpha == 190464 { + // 1488/2²⁴ is close enough to 1/1488 so that a₁ + // becomes a/α rounded down. + a1 = ((a1 * 11275) + (1 << 23)) >> 24 + + // For the corner-case a₁ = (q-1)/α = 44, we have to set a₁=0. + a1 ^= uint32(int32(43-a1)>>31) & a1 + } else { + panic("unsupported α") + } + + a0plusQ = a - a1*Alpha + + // In the corner-case, when we set a₁=0, we will incorrectly + // have a₀ > (q-1)/2 and we'll need to subtract q. As we + // return a₀ + q, that comes down to adding q if a₀ < (q-1)/2. + a0plusQ += uint32(int32(a0plusQ-(common.Q-1)/2)>>31) & common.Q + + return +} + +// Assume 0 ≤ r, f < Q with ‖f‖_∞ ≤ α/2. Decompose r as r = r1*α + r0 as +// computed by decompose(). Write r' := r - f (mod Q). Now, decompose +// r'=r-f again as r' = r'1*α + r'0 using decompose(). As f is small, we +// have r'1 = r1 + h, where h ∈ {-1, 0, 1}. makeHint() computes |h| +// given z0 := r0 - f (mod Q) and r1. With |h|, which is called the hint, +// we can reconstruct r1 using only r' = r - f, which is done by useHint(). +// To wit: +// +// useHint( r - f, makeHint( r0 - f, r1 ) ) = r1. +// +// Assumes 0 ≤ z0 < Q. +func makeHint(z0, r1 uint32) uint32 { + // If -α/2 < r0 - f ≤ α/2, then r1*α + r0 - f is a valid decomposition of r' + // with the restrictions of decompose() and so r'1 = r1. So the hint + // should be 0. This is covered by the first two inequalities. + // There is one other case: if r0 - f = -α/2, then r1*α + r0 - f is also + // a valid decomposition if r1 = 0. In the other cases a one is carried + // and the hint should be 1. + if z0 <= Gamma2 || z0 > common.Q-Gamma2 || (z0 == common.Q-Gamma2 && r1 == 0) { + return 0 + } + return 1 +} + +// Uses the hint created by makeHint() to reconstruct r1 from r'=r-f; see +// documentation of makeHint() for context. +// Assumes 0 ≤ r' < Q. +func useHint(rp uint32, hint uint32) uint32 { + rp0plusQ, rp1 := decompose(rp) + if hint == 0 { + return rp1 + } + if rp0plusQ > common.Q { + return (rp1 + 1) & 15 + } + return (rp1 - 1) & 15 +} + +// Sets p to the hint polynomial for p0 the modified low bits and p1 +// the unmodified high bits --- see makeHint(). +// +// Returns the number of ones in the hint polynomial. +func PolyMakeHint(p, p0, p1 *common.Poly) (pop uint32) { + for i := 0; i < common.N; i++ { + h := makeHint(p0[i], p1[i]) + pop += h + p[i] = h + } + return +} + +// Computes corrections to the high bits of the polynomial q according +// to the hints in h and sets p to the corrected high bits. Returns p. +func PolyUseHint(p, q, hint *common.Poly) { + var q0PlusQ common.Poly + + // See useHint() and makeHint() for an explanation. We reimplement it + // here so that we can call Poly.Decompose(), which might be way faster + // than calling decompose() in a loop (for instance when having AVX2.) + + PolyDecompose(q, &q0PlusQ, p) + + for i := 0; i < common.N; i++ { + if hint[i] == 0 { + continue + } + if Gamma2 == 261888 { + if q0PlusQ[i] > common.Q { + p[i] = (p[i] + 1) & 15 + } else { + p[i] = (p[i] - 1) & 15 + } + } else if Gamma2 == 95232 { + if q0PlusQ[i] > common.Q { + if p[i] == 43 { + p[i] = 0 + } else { + p[i]++ + } + } else { + if p[i] == 0 { + p[i] = 43 + } else { + p[i]-- + } + } + } else { + panic("unsupported γ₂") + } + } +} + +// Splits each of the coefficients of p using decompose. +func PolyDecompose(p, p0PlusQ, p1 *common.Poly) { + for i := 0; i < common.N; i++ { + p0PlusQ[i], p1[i] = decompose(p[i]) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/sample.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/sample.go new file mode 100644 index 0000000..b37370a --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/sample.go @@ -0,0 +1,339 @@ +// Code generated from mode3/internal/sample.go by gen.go + +package internal + +import ( + "encoding/binary" + + "github.com/cloudflare/circl/internal/sha3" + common "github.com/cloudflare/circl/sign/internal/dilithium" + "github.com/cloudflare/circl/simd/keccakf1600" +) + +// DeriveX4Available indicates whether the system supports the quick fourway +// sampling variants like PolyDeriveUniformX4. +var DeriveX4Available = keccakf1600.IsEnabledX4() + +// For each i, sample ps[i] uniformly from the given seed and nonces[i]. +// ps[i] may be nil and is ignored in that case. +// +// Can only be called when DeriveX4Available is true. +func PolyDeriveUniformX4(ps [4]*common.Poly, seed *[32]byte, nonces [4]uint16) { + var perm keccakf1600.StateX4 + state := perm.Initialize(false) + + // Absorb the seed in the four states + for i := 0; i < 4; i++ { + v := binary.LittleEndian.Uint64(seed[8*i : 8*(i+1)]) + for j := 0; j < 4; j++ { + state[i*4+j] = v + } + } + + // Absorb the nonces, the SHAKE128 domain separator (0b1111), the + // start of the padding (0b...001) and the end of the padding 0b100... + // Recall that the rate of SHAKE128 is 168 --- i.e. 21 uint64s. + for j := 0; j < 4; j++ { + state[4*4+j] = uint64(nonces[j]) | (0x1f << 16) + state[20*4+j] = 0x80 << 56 + } + + var idx [4]int // indices into ps + for j := 0; j < 4; j++ { + if ps[j] == nil { + idx[j] = common.N // mark nil polynomial as completed + } + } + + done := false + for !done { + // Applies KeccaK-f[1600] to state to get the next 21 uint64s of each + // of the four SHAKE128 streams. + perm.Permute() + + done = true + + PolyLoop: + for j := 0; j < 4; j++ { + if idx[j] == common.N { + continue + } + for i := 0; i < 7; i++ { + var t [8]uint32 + t[0] = uint32(state[i*3*4+j] & 0x7fffff) + t[1] = uint32((state[i*3*4+j] >> 24) & 0x7fffff) + t[2] = uint32((state[i*3*4+j] >> 48) | + ((state[(i*3+1)*4+j] & 0x7f) << 16)) + t[3] = uint32((state[(i*3+1)*4+j] >> 8) & 0x7fffff) + t[4] = uint32((state[(i*3+1)*4+j] >> 32) & 0x7fffff) + t[5] = uint32((state[(i*3+1)*4+j] >> 56) | + ((state[(i*3+2)*4+j] & 0x7fff) << 8)) + t[6] = uint32((state[(i*3+2)*4+j] >> 16) & 0x7fffff) + t[7] = uint32((state[(i*3+2)*4+j] >> 40) & 0x7fffff) + + for k := 0; k < 8; k++ { + if t[k] < common.Q { + ps[j][idx[j]] = t[k] + idx[j]++ + if idx[j] == common.N { + continue PolyLoop + } + } + } + } + done = false + } + } +} + +// Sample p uniformly from the given seed and nonce. +// +// p will be normalized. +func PolyDeriveUniform(p *common.Poly, seed *[32]byte, nonce uint16) { + var i, length int + var buf [12 * 16]byte // fits 168B SHAKE-128 rate + + length = 168 + + sample := func() { + // Note that 3 divides into 168 and 12*16, so we use up buf completely. + for j := 0; j < length && i < common.N; j += 3 { + t := (uint32(buf[j]) | (uint32(buf[j+1]) << 8) | + (uint32(buf[j+2]) << 16)) & 0x7fffff + + // We use rejection sampling + if t < common.Q { + p[i] = t + i++ + } + } + } + + var iv [32 + 2]byte // 32 byte seed + uint16 nonce + h := sha3.NewShake128() + copy(iv[:32], seed[:]) + iv[32] = uint8(nonce) + iv[33] = uint8(nonce >> 8) + _, _ = h.Write(iv[:]) + + for i < common.N { + _, _ = h.Read(buf[:168]) + sample() + } +} + +// Sample p uniformly with coefficients of norm less than or equal η, +// using the given seed and nonce. +// +// p will not be normalized, but will have coefficients in [q-η,q+η]. +func PolyDeriveUniformLeqEta(p *common.Poly, seed *[64]byte, nonce uint16) { + // Assumes 2 < η < 8. + var i, length int + var buf [9 * 16]byte // fits 136B SHAKE-256 rate + + length = 136 + + sample := func() { + // We use rejection sampling + for j := 0; j < length && i < common.N; j++ { + t1 := uint32(buf[j]) & 15 + t2 := uint32(buf[j]) >> 4 + if Eta == 2 { // branch is eliminated by compiler + if t1 <= 14 { + t1 -= ((205 * t1) >> 10) * 5 // reduce mod 5 + p[i] = common.Q + Eta - t1 + i++ + } + if t2 <= 14 && i < common.N { + t2 -= ((205 * t2) >> 10) * 5 // reduce mod 5 + p[i] = common.Q + Eta - t2 + i++ + } + } else if Eta == 4 { + if t1 <= 2*Eta { + p[i] = common.Q + Eta - t1 + i++ + } + if t2 <= 2*Eta && i < common.N { + p[i] = common.Q + Eta - t2 + i++ + } + } else { + panic("unsupported η") + } + } + } + + var iv [64 + 2]byte // 64 byte seed + uint16 nonce + + h := sha3.NewShake256() + copy(iv[:64], seed[:]) + iv[64] = uint8(nonce) + iv[65] = uint8(nonce >> 8) + + // 136 is SHAKE-256 rate + _, _ = h.Write(iv[:]) + + for i < common.N { + _, _ = h.Read(buf[:136]) + sample() + } +} + +// Sample v[i] uniformly with coefficients in (-γ₁,…,γ₁] using the +// given seed and nonce+i +// +// p will be normalized. +func VecLDeriveUniformLeGamma1(v *VecL, seed *[64]byte, nonce uint16) { + for i := 0; i < L; i++ { + PolyDeriveUniformLeGamma1(&v[i], seed, nonce+uint16(i)) + } +} + +// Sample p uniformly with coefficients in (-γ₁,…,γK1s] using the +// given seed and nonce. +// +// p will be normalized. +func PolyDeriveUniformLeGamma1(p *common.Poly, seed *[64]byte, nonce uint16) { + var buf [PolyLeGamma1Size]byte + + var iv [66]byte + h := sha3.NewShake256() + copy(iv[:64], seed[:]) + iv[64] = uint8(nonce) + iv[65] = uint8(nonce >> 8) + _, _ = h.Write(iv[:]) + _, _ = h.Read(buf[:]) + + PolyUnpackLeGamma1(p, buf[:]) +} + +// For each i, sample ps[i] uniformly with τ non-zero coefficients in {q-1,1} +// using the given seed and w1[i]. ps[i] may be nil and is ignored +// in that case. ps[i] will be normalized. +// +// Can only be called when DeriveX4Available is true. +// +// This function is currently not used (yet). +func PolyDeriveUniformBallX4(ps [4]*common.Poly, seed []byte) { + var perm keccakf1600.StateX4 + state := perm.Initialize(false) + + // Absorb the seed in the four states + for i := 0; i < CTildeSize/8; i++ { + v := binary.LittleEndian.Uint64(seed[8*i : 8*(i+1)]) + for j := 0; j < 4; j++ { + state[i*4+j] = v + } + } + + // SHAKE256 domain separator and padding + for j := 0; j < 4; j++ { + state[(CTildeSize/8)*4+j] ^= 0x1f + state[16*4+j] ^= 0x80 << 56 + } + perm.Permute() + + var signs [4]uint64 + var idx [4]uint16 // indices into ps + + for j := 0; j < 4; j++ { + if ps[j] != nil { + signs[j] = state[j] + *ps[j] = common.Poly{} // zero ps[j] + idx[j] = common.N - Tau + } else { + idx[j] = common.N // mark as completed + } + } + + stateOffset := 1 + for { + done := true + + PolyLoop: + for j := 0; j < 4; j++ { + if idx[j] == common.N { + continue + } + + for i := stateOffset; i < 17; i++ { + var bs [8]byte + binary.LittleEndian.PutUint64(bs[:], state[4*i+j]) + for k := 0; k < 8; k++ { + b := uint16(bs[k]) + + if b > idx[j] { + continue + } + + ps[j][idx[j]] = ps[j][b] + ps[j][b] = 1 + // Takes least significant bit of signs and uses it for the sign. + // Note 1 ^ (1 | (Q-1)) = Q-1. + ps[j][b] ^= uint32((-(signs[j] & 1)) & (1 | (common.Q - 1))) + signs[j] >>= 1 + + idx[j]++ + if idx[j] == common.N { + continue PolyLoop + } + } + } + + done = false + } + + if done { + break + } + + perm.Permute() + stateOffset = 0 + } +} + +// Samples p uniformly with τ non-zero coefficients in {q-1,1}. +// +// The polynomial p will be normalized. +func PolyDeriveUniformBall(p *common.Poly, seed []byte) { + var buf [136]byte // SHAKE-256 rate is 136 + + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + _, _ = h.Read(buf[:]) + + // Essentially we generate a sequence of τ ones or minus ones, + // prepend 196 zeroes and shuffle the concatenation using the + // usual algorithm (Fisher--Yates.) + signs := binary.LittleEndian.Uint64(buf[:]) + bufOff := 8 // offset into buf + + *p = common.Poly{} // zero p + for i := uint16(common.N - Tau); i < common.N; i++ { + var b uint16 + + // Find location of where to move the new coefficient to using + // rejection sampling. + for { + if bufOff >= 136 { + _, _ = h.Read(buf[:]) + bufOff = 0 + } + + b = uint16(buf[bufOff]) + bufOff++ + + if b <= i { + break + } + } + + p[i] = p[b] + p[b] = 1 + // Takes least significant bit of signs and uses it for the sign. + // Note 1 ^ (1 | (Q-1)) = Q-1. + p[b] ^= uint32((-(signs & 1)) & (1 | (common.Q - 1))) + signs >>= 1 + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/vec.go b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/vec.go new file mode 100644 index 0000000..d07d3b2 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/dilithium/mode5/internal/vec.go @@ -0,0 +1,281 @@ +// Code generated from mode3/internal/vec.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// A vector of L polynomials. +type VecL [L]common.Poly + +// A vector of K polynomials. +type VecK [K]common.Poly + +// Normalize the polynomials in this vector. +func (v *VecL) Normalize() { + for i := 0; i < L; i++ { + v[i].Normalize() + } +} + +// Normalize the polynomials in this vector assuming their coefficients +// are already bounded by 2q. +func (v *VecL) NormalizeAssumingLe2Q() { + for i := 0; i < L; i++ { + v[i].NormalizeAssumingLe2Q() + } +} + +// Sets v to w + u. Does not normalize. +func (v *VecL) Add(w, u *VecL) { + for i := 0; i < L; i++ { + v[i].Add(&w[i], &u[i]) + } +} + +// Applies NTT componentwise. See Poly.NTT() for details. +func (v *VecL) NTT() { + for i := 0; i < L; i++ { + v[i].NTT() + } +} + +// Checks whether any of the coefficients exceeds the given bound in supnorm +// +// Requires the vector to be normalized. +func (v *VecL) Exceeds(bound uint32) bool { + for i := 0; i < L; i++ { + if v[i].Exceeds(bound) { + return true + } + } + return false +} + +// Applies Poly.Power2Round componentwise. +// +// Requires the vector to be normalized. +func (v *VecL) Power2Round(v0PlusQ, v1 *VecL) { + for i := 0; i < L; i++ { + v[i].Power2Round(&v0PlusQ[i], &v1[i]) + } +} + +// Applies Poly.Decompose componentwise. +// +// Requires the vector to be normalized. +func (v *VecL) Decompose(v0PlusQ, v1 *VecL) { + for i := 0; i < L; i++ { + PolyDecompose(&v[i], &v0PlusQ[i], &v1[i]) + } +} + +// Sequentially packs each polynomial using Poly.PackLeqEta(). +func (v *VecL) PackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyPackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sets v to the polynomials packed in buf using VecL.PackLeqEta(). +func (v *VecL) UnpackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyUnpackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sequentially packs each polynomial using PolyPackLeGamma1(). +func (v *VecL) PackLeGamma1(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyPackLeGamma1(&v[i], buf[offset:]) + offset += PolyLeGamma1Size + } +} + +// Sets v to the polynomials packed in buf using VecL.PackLeGamma1(). +func (v *VecL) UnpackLeGamma1(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyUnpackLeGamma1(&v[i], buf[offset:]) + offset += PolyLeGamma1Size + } +} + +// Normalize the polynomials in this vector. +func (v *VecK) Normalize() { + for i := 0; i < K; i++ { + v[i].Normalize() + } +} + +// Normalize the polynomials in this vector assuming their coefficients +// are already bounded by 2q. +func (v *VecK) NormalizeAssumingLe2Q() { + for i := 0; i < K; i++ { + v[i].NormalizeAssumingLe2Q() + } +} + +// Sets v to w + u. Does not normalize. +func (v *VecK) Add(w, u *VecK) { + for i := 0; i < K; i++ { + v[i].Add(&w[i], &u[i]) + } +} + +// Checks whether any of the coefficients exceeds the given bound in supnorm +// +// Requires the vector to be normalized. +func (v *VecK) Exceeds(bound uint32) bool { + for i := 0; i < K; i++ { + if v[i].Exceeds(bound) { + return true + } + } + return false +} + +// Applies Poly.Power2Round componentwise. +// +// Requires the vector to be normalized. +func (v *VecK) Power2Round(v0PlusQ, v1 *VecK) { + for i := 0; i < K; i++ { + v[i].Power2Round(&v0PlusQ[i], &v1[i]) + } +} + +// Applies Poly.Decompose componentwise. +// +// Requires the vector to be normalized. +func (v *VecK) Decompose(v0PlusQ, v1 *VecK) { + for i := 0; i < K; i++ { + PolyDecompose(&v[i], &v0PlusQ[i], &v1[i]) + } +} + +// Sets v to the hint vector for v0 the modified low bits and v1 +// the unmodified high bits --- see makeHint(). +// +// Returns the number of ones in the hint vector. +func (v *VecK) MakeHint(v0, v1 *VecK) (pop uint32) { + for i := 0; i < K; i++ { + pop += PolyMakeHint(&v[i], &v0[i], &v1[i]) + } + return +} + +// Computes corrections to the high bits of the polynomials in the vector +// w using the hints in h and sets v to the corrected high bits. Returns v. +// See useHint(). +func (v *VecK) UseHint(q, hint *VecK) *VecK { + for i := 0; i < K; i++ { + PolyUseHint(&v[i], &q[i], &hint[i]) + } + return v +} + +// Sequentially packs each polynomial using Poly.PackT1(). +func (v *VecK) PackT1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].PackT1(buf[offset:]) + offset += common.PolyT1Size + } +} + +// Sets v to the vector packed into buf by PackT1(). +func (v *VecK) UnpackT1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].UnpackT1(buf[offset:]) + offset += common.PolyT1Size + } +} + +// Sequentially packs each polynomial using Poly.PackT0(). +func (v *VecK) PackT0(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].PackT0(buf[offset:]) + offset += common.PolyT0Size + } +} + +// Sets v to the vector packed into buf by PackT0(). +func (v *VecK) UnpackT0(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].UnpackT0(buf[offset:]) + offset += common.PolyT0Size + } +} + +// Sequentially packs each polynomial using Poly.PackLeqEta(). +func (v *VecK) PackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyPackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sets v to the polynomials packed in buf using VecK.PackLeqEta(). +func (v *VecK) UnpackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyUnpackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Applies NTT componentwise. See Poly.NTT() for details. +func (v *VecK) NTT() { + for i := 0; i < K; i++ { + v[i].NTT() + } +} + +// Sequentially packs each polynomial using PolyPackW1(). +func (v *VecK) PackW1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyPackW1(&v[i], buf[offset:]) + offset += PolyW1Size + } +} + +// Sets v to a - b. +// +// Warning: assumes coefficients of the polynomials of b are less than 2q. +func (v *VecK) Sub(a, b *VecK) { + for i := 0; i < K; i++ { + v[i].Sub(&a[i], &b[i]) + } +} + +// Sets v to 2ᵈ w without reducing. +func (v *VecK) MulBy2toD(w *VecK) { + for i := 0; i < K; i++ { + v[i].MulBy2toD(&w[i]) + } +} + +// Applies InvNTT componentwise. See Poly.InvNTT() for details. +func (v *VecK) InvNTT() { + for i := 0; i < K; i++ { + v[i].InvNTT() + } +} + +// Applies Poly.ReduceLe2Q() componentwise. +func (v *VecK) ReduceLe2Q() { + for i := 0; i < K; i++ { + v[i].ReduceLe2Q() + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/ed25519/ed25519.go b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/ed25519.go new file mode 100644 index 0000000..2c73c26 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/ed25519.go @@ -0,0 +1,453 @@ +// Package ed25519 implements Ed25519 signature scheme as described in RFC-8032. +// +// This package provides optimized implementations of the three signature +// variants and maintaining closer compatibility with crypto/ed25519. +// +// | Scheme Name | Sign Function | Verification | Context | +// |-------------|-------------------|---------------|-------------------| +// | Ed25519 | Sign | Verify | None | +// | Ed25519Ph | SignPh | VerifyPh | Yes, can be empty | +// | Ed25519Ctx | SignWithCtx | VerifyWithCtx | Yes, non-empty | +// | All above | (PrivateKey).Sign | VerifyAny | As above | +// +// Specific functions for sign and verify are defined. A generic signing +// function for all schemes is available through the crypto.Signer interface, +// which is implemented by the PrivateKey type. A correspond all-in-one +// verification method is provided by the VerifyAny function. +// +// Signing with Ed25519Ph or Ed25519Ctx requires a context string for domain +// separation. This parameter is passed using a SignerOptions struct defined +// in this package. While Ed25519Ph accepts an empty context, Ed25519Ctx +// enforces non-empty context strings. +// +// # Compatibility with crypto.ed25519 +// +// These functions are compatible with the “Ed25519” function defined in +// RFC-8032. However, unlike RFC 8032's formulation, this package's private +// key representation includes a public key suffix to make multiple signing +// operations with the same key more efficient. This package refers to the +// RFC-8032 private key as the “seed”. +// +// References +// +// - RFC-8032: https://rfc-editor.org/rfc/rfc8032.txt +// - Ed25519: https://ed25519.cr.yp.to/ +// - EdDSA: High-speed high-security signatures. https://doi.org/10.1007/s13389-012-0027-1 +package ed25519 + +import ( + "bytes" + "crypto" + cryptoRand "crypto/rand" + "crypto/sha512" + "crypto/subtle" + "errors" + "fmt" + "io" + "strconv" + + "github.com/cloudflare/circl/sign" +) + +const ( + // ContextMaxSize is the maximum length (in bytes) allowed for context. + ContextMaxSize = 255 + // PublicKeySize is the size, in bytes, of public keys as used in this package. + PublicKeySize = 32 + // PrivateKeySize is the size, in bytes, of private keys as used in this package. + PrivateKeySize = 64 + // SignatureSize is the size, in bytes, of signatures generated and verified by this package. + SignatureSize = 64 + // SeedSize is the size, in bytes, of private key seeds. These are the private key representations used by RFC 8032. + SeedSize = 32 +) + +const ( + paramB = 256 / 8 // Size of keys in bytes. +) + +// SignerOptions implements crypto.SignerOpts and augments with parameters +// that are specific to the Ed25519 signature schemes. +type SignerOptions struct { + // Hash must be crypto.Hash(0) for Ed25519/Ed25519ctx, or crypto.SHA512 + // for Ed25519ph. + crypto.Hash + + // Context is an optional domain separation string for Ed25519ph and a + // must for Ed25519ctx. Its length must be less or equal than 255 bytes. + Context string + + // Scheme is an identifier for choosing a signature scheme. The zero value + // is ED25519. + Scheme SchemeID +} + +// SchemeID is an identifier for each signature scheme. +type SchemeID uint + +const ( + ED25519 SchemeID = iota + ED25519Ph + ED25519Ctx +) + +// PrivateKey is the type of Ed25519 private keys. It implements crypto.Signer. +type PrivateKey []byte + +// Equal reports whether priv and x have the same value. +func (priv PrivateKey) Equal(x crypto.PrivateKey) bool { + xx, ok := x.(PrivateKey) + return ok && subtle.ConstantTimeCompare(priv, xx) == 1 +} + +// Public returns the PublicKey corresponding to priv. +func (priv PrivateKey) Public() crypto.PublicKey { + publicKey := make(PublicKey, PublicKeySize) + copy(publicKey, priv[SeedSize:]) + return publicKey +} + +// Seed returns the private key seed corresponding to priv. It is provided for +// interoperability with RFC 8032. RFC 8032's private keys correspond to seeds +// in this package. +func (priv PrivateKey) Seed() []byte { + seed := make([]byte, SeedSize) + copy(seed, priv[:SeedSize]) + return seed +} + +func (priv PrivateKey) Scheme() sign.Scheme { return sch } + +func (pub PublicKey) Scheme() sign.Scheme { return sch } + +func (priv PrivateKey) MarshalBinary() (data []byte, err error) { + privateKey := make(PrivateKey, PrivateKeySize) + copy(privateKey, priv) + return privateKey, nil +} + +func (pub PublicKey) MarshalBinary() (data []byte, err error) { + publicKey := make(PublicKey, PublicKeySize) + copy(publicKey, pub) + return publicKey, nil +} + +// Equal reports whether pub and x have the same value. +func (pub PublicKey) Equal(x crypto.PublicKey) bool { + xx, ok := x.(PublicKey) + return ok && bytes.Equal(pub, xx) +} + +// Sign creates a signature of a message with priv key. +// This function is compatible with crypto.ed25519 and also supports the +// three signature variants defined in RFC-8032, namely Ed25519 (or pure +// EdDSA), Ed25519Ph, and Ed25519Ctx. +// The opts.HashFunc() must return zero to specify either Ed25519 or Ed25519Ctx +// variant. This can be achieved by passing crypto.Hash(0) as the value for +// opts. +// The opts.HashFunc() must return SHA512 to specify the Ed25519Ph variant. +// This can be achieved by passing crypto.SHA512 as the value for opts. +// Use a SignerOptions struct (defined in this package) to pass a context +// string for signing. +func (priv PrivateKey) Sign( + rand io.Reader, + message []byte, + opts crypto.SignerOpts, +) (signature []byte, err error) { + var ctx string + var scheme SchemeID + if o, ok := opts.(SignerOptions); ok { + ctx = o.Context + scheme = o.Scheme + } + + switch true { + case scheme == ED25519 && opts.HashFunc() == crypto.Hash(0): + return Sign(priv, message), nil + case scheme == ED25519Ph && opts.HashFunc() == crypto.SHA512: + return SignPh(priv, message, ctx), nil + case scheme == ED25519Ctx && opts.HashFunc() == crypto.Hash(0) && len(ctx) > 0: + return SignWithCtx(priv, message, ctx), nil + default: + return nil, errors.New("ed25519: bad hash algorithm") + } +} + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (PublicKey, PrivateKey, error) { + if rand == nil { + rand = cryptoRand.Reader + } + + seed := make([]byte, SeedSize) + if _, err := io.ReadFull(rand, seed); err != nil { + return nil, nil, err + } + + privateKey := NewKeyFromSeed(seed) + publicKey := make(PublicKey, PublicKeySize) + copy(publicKey, privateKey[SeedSize:]) + + return publicKey, privateKey, nil +} + +// NewKeyFromSeed calculates a private key from a seed. It will panic if +// len(seed) is not SeedSize. This function is provided for interoperability +// with RFC 8032. RFC 8032's private keys correspond to seeds in this +// package. +func NewKeyFromSeed(seed []byte) PrivateKey { + privateKey := make(PrivateKey, PrivateKeySize) + newKeyFromSeed(privateKey, seed) + return privateKey +} + +func newKeyFromSeed(privateKey, seed []byte) { + if l := len(seed); l != SeedSize { + panic("ed25519: bad seed length: " + strconv.Itoa(l)) + } + var P pointR1 + k := sha512.Sum512(seed) + clamp(k[:]) + reduceModOrder(k[:paramB], false) + P.fixedMult(k[:paramB]) + copy(privateKey[:SeedSize], seed) + _ = P.ToBytes(privateKey[SeedSize:]) +} + +func signAll(signature []byte, privateKey PrivateKey, message, ctx []byte, preHash bool) { + if l := len(privateKey); l != PrivateKeySize { + panic("ed25519: bad private key length: " + strconv.Itoa(l)) + } + + H := sha512.New() + var PHM []byte + + if preHash { + _, _ = H.Write(message) + PHM = H.Sum(nil) + H.Reset() + } else { + PHM = message + } + + // 1. Hash the 32-byte private key using SHA-512. + _, _ = H.Write(privateKey[:SeedSize]) + h := H.Sum(nil) + clamp(h[:]) + prefix, s := h[paramB:], h[:paramB] + + // 2. Compute SHA-512(dom2(F, C) || prefix || PH(M)) + H.Reset() + + writeDom(H, ctx, preHash) + + _, _ = H.Write(prefix) + _, _ = H.Write(PHM) + r := H.Sum(nil) + reduceModOrder(r[:], true) + + // 3. Compute the point [r]B. + var P pointR1 + P.fixedMult(r[:paramB]) + R := (&[paramB]byte{})[:] + if err := P.ToBytes(R); err != nil { + panic(err) + } + + // 4. Compute SHA512(dom2(F, C) || R || A || PH(M)). + H.Reset() + + writeDom(H, ctx, preHash) + + _, _ = H.Write(R) + _, _ = H.Write(privateKey[SeedSize:]) + _, _ = H.Write(PHM) + hRAM := H.Sum(nil) + + reduceModOrder(hRAM[:], true) + + // 5. Compute S = (r + k * s) mod order. + S := (&[paramB]byte{})[:] + calculateS(S, r[:paramB], hRAM[:paramB], s) + + // 6. The signature is the concatenation of R and S. + copy(signature[:paramB], R[:]) + copy(signature[paramB:], S[:]) +} + +// Sign signs the message with privateKey and returns a signature. +// This function supports the signature variant defined in RFC-8032: Ed25519, +// also known as the pure version of EdDSA. +// It will panic if len(privateKey) is not PrivateKeySize. +func Sign(privateKey PrivateKey, message []byte) []byte { + signature := make([]byte, SignatureSize) + signAll(signature, privateKey, message, []byte(""), false) + return signature +} + +// SignPh creates a signature of a message with private key and context. +// This function supports the signature variant defined in RFC-8032: Ed25519ph, +// meaning it internally hashes the message using SHA-512, and optionally +// accepts a context string. +// It will panic if len(privateKey) is not PrivateKeySize. +// Context could be passed to this function, which length should be no more than +// ContextMaxSize=255. It can be empty. +func SignPh(privateKey PrivateKey, message []byte, ctx string) []byte { + if len(ctx) > ContextMaxSize { + panic(fmt.Errorf("ed25519: bad context length: %v", len(ctx))) + } + + signature := make([]byte, SignatureSize) + signAll(signature, privateKey, message, []byte(ctx), true) + return signature +} + +// SignWithCtx creates a signature of a message with private key and context. +// This function supports the signature variant defined in RFC-8032: Ed25519ctx, +// meaning it accepts a non-empty context string. +// It will panic if len(privateKey) is not PrivateKeySize. +// Context must be passed to this function, which length should be no more than +// ContextMaxSize=255 and cannot be empty. +func SignWithCtx(privateKey PrivateKey, message []byte, ctx string) []byte { + if len(ctx) == 0 || len(ctx) > ContextMaxSize { + panic(fmt.Errorf("ed25519: bad context length: %v > %v", len(ctx), ContextMaxSize)) + } + + signature := make([]byte, SignatureSize) + signAll(signature, privateKey, message, []byte(ctx), false) + return signature +} + +func verify(public PublicKey, message, signature, ctx []byte, preHash bool) bool { + if len(public) != PublicKeySize || + len(signature) != SignatureSize || + !isLessThanOrder(signature[paramB:]) { + return false + } + + var P pointR1 + if ok := P.FromBytes(public); !ok { + return false + } + + H := sha512.New() + var PHM []byte + + if preHash { + _, _ = H.Write(message) + PHM = H.Sum(nil) + H.Reset() + } else { + PHM = message + } + + R := signature[:paramB] + + writeDom(H, ctx, preHash) + + _, _ = H.Write(R) + _, _ = H.Write(public) + _, _ = H.Write(PHM) + hRAM := H.Sum(nil) + reduceModOrder(hRAM[:], true) + + var Q pointR1 + encR := (&[paramB]byte{})[:] + P.neg() + Q.doubleMult(&P, signature[paramB:], hRAM[:paramB]) + _ = Q.ToBytes(encR) + return bytes.Equal(R, encR) +} + +// VerifyAny returns true if the signature is valid. Failure cases are invalid +// signature, or when the public key cannot be decoded. +// This function supports all the three signature variants defined in RFC-8032, +// namely Ed25519 (or pure EdDSA), Ed25519Ph, and Ed25519Ctx. +// The opts.HashFunc() must return zero to specify either Ed25519 or Ed25519Ctx +// variant. This can be achieved by passing crypto.Hash(0) as the value for opts. +// The opts.HashFunc() must return SHA512 to specify the Ed25519Ph variant. +// This can be achieved by passing crypto.SHA512 as the value for opts. +// Use a SignerOptions struct to pass a context string for signing. +func VerifyAny(public PublicKey, message, signature []byte, opts crypto.SignerOpts) bool { + var ctx string + var scheme SchemeID + if o, ok := opts.(SignerOptions); ok { + ctx = o.Context + scheme = o.Scheme + } + + switch true { + case scheme == ED25519 && opts.HashFunc() == crypto.Hash(0): + return Verify(public, message, signature) + case scheme == ED25519Ph && opts.HashFunc() == crypto.SHA512: + return VerifyPh(public, message, signature, ctx) + case scheme == ED25519Ctx && opts.HashFunc() == crypto.Hash(0) && len(ctx) > 0: + return VerifyWithCtx(public, message, signature, ctx) + default: + return false + } +} + +// Verify returns true if the signature is valid. Failure cases are invalid +// signature, or when the public key cannot be decoded. +// This function supports the signature variant defined in RFC-8032: Ed25519, +// also known as the pure version of EdDSA. +func Verify(public PublicKey, message, signature []byte) bool { + return verify(public, message, signature, []byte(""), false) +} + +// VerifyPh returns true if the signature is valid. Failure cases are invalid +// signature, or when the public key cannot be decoded. +// This function supports the signature variant defined in RFC-8032: Ed25519ph, +// meaning it internally hashes the message using SHA-512. +// Context could be passed to this function, which length should be no more than +// 255. It can be empty. +func VerifyPh(public PublicKey, message, signature []byte, ctx string) bool { + return verify(public, message, signature, []byte(ctx), true) +} + +// VerifyWithCtx returns true if the signature is valid. Failure cases are invalid +// signature, or when the public key cannot be decoded, or when context is +// not provided. +// This function supports the signature variant defined in RFC-8032: Ed25519ctx, +// meaning it does not handle prehashed messages. Non-empty context string must be +// provided, and must not be more than 255 of length. +func VerifyWithCtx(public PublicKey, message, signature []byte, ctx string) bool { + if len(ctx) == 0 || len(ctx) > ContextMaxSize { + return false + } + + return verify(public, message, signature, []byte(ctx), false) +} + +func clamp(k []byte) { + k[0] &= 248 + k[paramB-1] = (k[paramB-1] & 127) | 64 +} + +// isLessThanOrder returns true if 0 <= x < order. +func isLessThanOrder(x []byte) bool { + i := len(order) - 1 + for i > 0 && x[i] == order[i] { + i-- + } + return x[i] < order[i] +} + +func writeDom(h io.Writer, ctx []byte, preHash bool) { + dom2 := "SigEd25519 no Ed25519 collisions" + + if len(ctx) > 0 { + _, _ = h.Write([]byte(dom2)) + if preHash { + _, _ = h.Write([]byte{byte(0x01), byte(len(ctx))}) + } else { + _, _ = h.Write([]byte{byte(0x00), byte(len(ctx))}) + } + _, _ = h.Write(ctx) + } else if preHash { + _, _ = h.Write([]byte(dom2)) + _, _ = h.Write([]byte{0x01, 0x00}) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/ed25519/modular.go b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/modular.go new file mode 100644 index 0000000..10efafd --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/modular.go @@ -0,0 +1,175 @@ +package ed25519 + +import ( + "encoding/binary" + "math/bits" +) + +var order = [paramB]byte{ + 0xed, 0xd3, 0xf5, 0x5c, 0x1a, 0x63, 0x12, 0x58, + 0xd6, 0x9c, 0xf7, 0xa2, 0xde, 0xf9, 0xde, 0x14, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, +} + +// isLessThan returns true if 0 <= x < y, and assumes that slices have the same length. +func isLessThan(x, y []byte) bool { + i := len(x) - 1 + for i > 0 && x[i] == y[i] { + i-- + } + return x[i] < y[i] +} + +// reduceModOrder calculates k = k mod order of the curve. +func reduceModOrder(k []byte, is512Bit bool) { + var X [((2 * paramB) * 8) / 64]uint64 + numWords := len(k) >> 3 + for i := 0; i < numWords; i++ { + X[i] = binary.LittleEndian.Uint64(k[i*8 : (i+1)*8]) + } + red512(&X, is512Bit) + for i := 0; i < numWords; i++ { + binary.LittleEndian.PutUint64(k[i*8:(i+1)*8], X[i]) + } +} + +// red512 calculates x = x mod Order of the curve. +func red512(x *[8]uint64, full bool) { + // Implementation of Algs.(14.47)+(14.52) of Handbook of Applied + // Cryptography, by A. Menezes, P. van Oorschot, and S. Vanstone. + const ( + ell0 = uint64(0x5812631a5cf5d3ed) + ell1 = uint64(0x14def9dea2f79cd6) + ell160 = uint64(0x812631a5cf5d3ed0) + ell161 = uint64(0x4def9dea2f79cd65) + ell162 = uint64(0x0000000000000001) + ) + + var c0, c1, c2, c3 uint64 + r0, r1, r2, r3, r4 := x[0], x[1], x[2], x[3], uint64(0) + + if full { + q0, q1, q2, q3 := x[4], x[5], x[6], x[7] + + for i := 0; i < 3; i++ { + h0, s0 := bits.Mul64(q0, ell160) + h1, s1 := bits.Mul64(q1, ell160) + h2, s2 := bits.Mul64(q2, ell160) + h3, s3 := bits.Mul64(q3, ell160) + + s1, c0 = bits.Add64(h0, s1, 0) + s2, c1 = bits.Add64(h1, s2, c0) + s3, c2 = bits.Add64(h2, s3, c1) + s4, _ := bits.Add64(h3, 0, c2) + + h0, l0 := bits.Mul64(q0, ell161) + h1, l1 := bits.Mul64(q1, ell161) + h2, l2 := bits.Mul64(q2, ell161) + h3, l3 := bits.Mul64(q3, ell161) + + l1, c0 = bits.Add64(h0, l1, 0) + l2, c1 = bits.Add64(h1, l2, c0) + l3, c2 = bits.Add64(h2, l3, c1) + l4, _ := bits.Add64(h3, 0, c2) + + s1, c0 = bits.Add64(s1, l0, 0) + s2, c1 = bits.Add64(s2, l1, c0) + s3, c2 = bits.Add64(s3, l2, c1) + s4, c3 = bits.Add64(s4, l3, c2) + s5, s6 := bits.Add64(l4, 0, c3) + + s2, c0 = bits.Add64(s2, q0, 0) + s3, c1 = bits.Add64(s3, q1, c0) + s4, c2 = bits.Add64(s4, q2, c1) + s5, c3 = bits.Add64(s5, q3, c2) + s6, s7 := bits.Add64(s6, 0, c3) + + q := q0 | q1 | q2 | q3 + m := -((q | -q) >> 63) // if q=0 then m=0...0 else m=1..1 + s0 &= m + s1 &= m + s2 &= m + s3 &= m + q0, q1, q2, q3 = s4, s5, s6, s7 + + if (i+1)%2 == 0 { + r0, c0 = bits.Add64(r0, s0, 0) + r1, c1 = bits.Add64(r1, s1, c0) + r2, c2 = bits.Add64(r2, s2, c1) + r3, c3 = bits.Add64(r3, s3, c2) + r4, _ = bits.Add64(r4, 0, c3) + } else { + r0, c0 = bits.Sub64(r0, s0, 0) + r1, c1 = bits.Sub64(r1, s1, c0) + r2, c2 = bits.Sub64(r2, s2, c1) + r3, c3 = bits.Sub64(r3, s3, c2) + r4, _ = bits.Sub64(r4, 0, c3) + } + } + + m := -(r4 >> 63) + r0, c0 = bits.Add64(r0, m&ell160, 0) + r1, c1 = bits.Add64(r1, m&ell161, c0) + r2, c2 = bits.Add64(r2, m&ell162, c1) + r3, c3 = bits.Add64(r3, 0, c2) + r4, _ = bits.Add64(r4, m&1, c3) + x[4], x[5], x[6], x[7] = 0, 0, 0, 0 + } + + q0 := (r4 << 4) | (r3 >> 60) + r3 &= (uint64(1) << 60) - 1 + + h0, s0 := bits.Mul64(ell0, q0) + h1, s1 := bits.Mul64(ell1, q0) + s1, c0 = bits.Add64(h0, s1, 0) + s2, _ := bits.Add64(h1, 0, c0) + + r0, c0 = bits.Sub64(r0, s0, 0) + r1, c1 = bits.Sub64(r1, s1, c0) + r2, c2 = bits.Sub64(r2, s2, c1) + r3, _ = bits.Sub64(r3, 0, c2) + + x[0], x[1], x[2], x[3] = r0, r1, r2, r3 +} + +// calculateS performs s = r+k*a mod Order of the curve. +func calculateS(s, r, k, a []byte) { + K := [4]uint64{ + binary.LittleEndian.Uint64(k[0*8 : 1*8]), + binary.LittleEndian.Uint64(k[1*8 : 2*8]), + binary.LittleEndian.Uint64(k[2*8 : 3*8]), + binary.LittleEndian.Uint64(k[3*8 : 4*8]), + } + S := [8]uint64{ + binary.LittleEndian.Uint64(r[0*8 : 1*8]), + binary.LittleEndian.Uint64(r[1*8 : 2*8]), + binary.LittleEndian.Uint64(r[2*8 : 3*8]), + binary.LittleEndian.Uint64(r[3*8 : 4*8]), + } + var c3 uint64 + for i := range K { + ai := binary.LittleEndian.Uint64(a[i*8 : (i+1)*8]) + + h0, l0 := bits.Mul64(K[0], ai) + h1, l1 := bits.Mul64(K[1], ai) + h2, l2 := bits.Mul64(K[2], ai) + h3, l3 := bits.Mul64(K[3], ai) + + l1, c0 := bits.Add64(h0, l1, 0) + l2, c1 := bits.Add64(h1, l2, c0) + l3, c2 := bits.Add64(h2, l3, c1) + l4, _ := bits.Add64(h3, 0, c2) + + S[i+0], c0 = bits.Add64(S[i+0], l0, 0) + S[i+1], c1 = bits.Add64(S[i+1], l1, c0) + S[i+2], c2 = bits.Add64(S[i+2], l2, c1) + S[i+3], c3 = bits.Add64(S[i+3], l3, c2) + S[i+4], _ = bits.Add64(S[i+4], l4, c3) + } + red512(&S, true) + binary.LittleEndian.PutUint64(s[0*8:1*8], S[0]) + binary.LittleEndian.PutUint64(s[1*8:2*8], S[1]) + binary.LittleEndian.PutUint64(s[2*8:3*8], S[2]) + binary.LittleEndian.PutUint64(s[3*8:4*8], S[3]) +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/ed25519/mult.go b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/mult.go new file mode 100644 index 0000000..3216aae --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/mult.go @@ -0,0 +1,180 @@ +package ed25519 + +import ( + "crypto/subtle" + "encoding/binary" + "math/bits" + + "github.com/cloudflare/circl/internal/conv" + "github.com/cloudflare/circl/math" + fp "github.com/cloudflare/circl/math/fp25519" +) + +var paramD = fp.Elt{ + 0xa3, 0x78, 0x59, 0x13, 0xca, 0x4d, 0xeb, 0x75, + 0xab, 0xd8, 0x41, 0x41, 0x4d, 0x0a, 0x70, 0x00, + 0x98, 0xe8, 0x79, 0x77, 0x79, 0x40, 0xc7, 0x8c, + 0x73, 0xfe, 0x6f, 0x2b, 0xee, 0x6c, 0x03, 0x52, +} + +// mLSBRecoding parameters. +const ( + fxT = 257 + fxV = 2 + fxW = 3 + fx2w1 = 1 << (uint(fxW) - 1) + numWords64 = (paramB * 8 / 64) +) + +// mLSBRecoding is the odd-only modified LSB-set. +// +// Reference: +// +// "Efficient and secure algorithms for GLV-based scalar multiplication and +// their implementation on GLV–GLS curves" by (Faz-Hernandez et al.) +// http://doi.org/10.1007/s13389-014-0085-7. +func mLSBRecoding(L []int8, k []byte) { + const ee = (fxT + fxW*fxV - 1) / (fxW * fxV) + const dd = ee * fxV + const ll = dd * fxW + if len(L) == (ll + 1) { + var m [numWords64 + 1]uint64 + for i := 0; i < numWords64; i++ { + m[i] = binary.LittleEndian.Uint64(k[8*i : 8*i+8]) + } + condAddOrderN(&m) + L[dd-1] = 1 + for i := 0; i < dd-1; i++ { + kip1 := (m[(i+1)/64] >> (uint(i+1) % 64)) & 0x1 + L[i] = int8(kip1<<1) - 1 + } + { // right-shift by d + right := uint(dd % 64) + left := uint(64) - right + lim := ((numWords64+1)*64 - dd) / 64 + j := dd / 64 + for i := 0; i < lim; i++ { + m[i] = (m[i+j] >> right) | (m[i+j+1] << left) + } + m[lim] = m[lim+j] >> right + } + for i := dd; i < ll; i++ { + L[i] = L[i%dd] * int8(m[0]&0x1) + div2subY(m[:], int64(L[i]>>1), numWords64) + } + L[ll] = int8(m[0]) + } +} + +// absolute returns always a positive value. +func absolute(x int32) int32 { + mask := x >> 31 + return (x + mask) ^ mask +} + +// condAddOrderN updates x = x+order if x is even, otherwise x remains unchanged. +func condAddOrderN(x *[numWords64 + 1]uint64) { + isOdd := (x[0] & 0x1) - 1 + c := uint64(0) + for i := 0; i < numWords64; i++ { + orderWord := binary.LittleEndian.Uint64(order[8*i : 8*i+8]) + o := isOdd & orderWord + x0, c0 := bits.Add64(x[i], o, c) + x[i] = x0 + c = c0 + } + x[numWords64], _ = bits.Add64(x[numWords64], 0, c) +} + +// div2subY update x = (x/2) - y. +func div2subY(x []uint64, y int64, l int) { + s := uint64(y >> 63) + for i := 0; i < l-1; i++ { + x[i] = (x[i] >> 1) | (x[i+1] << 63) + } + x[l-1] = (x[l-1] >> 1) + + b := uint64(0) + x0, b0 := bits.Sub64(x[0], uint64(y), b) + x[0] = x0 + b = b0 + for i := 1; i < l-1; i++ { + x0, b0 := bits.Sub64(x[i], s, b) + x[i] = x0 + b = b0 + } + x[l-1], _ = bits.Sub64(x[l-1], s, b) +} + +func (P *pointR1) fixedMult(scalar []byte) { + if len(scalar) != paramB { + panic("wrong scalar size") + } + const ee = (fxT + fxW*fxV - 1) / (fxW * fxV) + const dd = ee * fxV + const ll = dd * fxW + + L := make([]int8, ll+1) + mLSBRecoding(L[:], scalar) + S := &pointR3{} + P.SetIdentity() + for ii := ee - 1; ii >= 0; ii-- { + P.double() + for j := 0; j < fxV; j++ { + dig := L[fxW*dd-j*ee+ii-ee] + for i := (fxW-1)*dd - j*ee + ii - ee; i >= (2*dd - j*ee + ii - ee); i = i - dd { + dig = 2*dig + L[i] + } + idx := absolute(int32(dig)) + sig := L[dd-j*ee+ii-ee] + Tabj := &tabSign[fxV-j-1] + for k := 0; k < fx2w1; k++ { + S.cmov(&Tabj[k], subtle.ConstantTimeEq(int32(k), idx)) + } + S.cneg(subtle.ConstantTimeEq(int32(sig), -1)) + P.mixAdd(S) + } + } +} + +const ( + omegaFix = 7 + omegaVar = 5 +) + +// doubleMult returns P=mG+nQ. +func (P *pointR1) doubleMult(Q *pointR1, m, n []byte) { + nafFix := math.OmegaNAF(conv.BytesLe2BigInt(m), omegaFix) + nafVar := math.OmegaNAF(conv.BytesLe2BigInt(n), omegaVar) + + if len(nafFix) > len(nafVar) { + nafVar = append(nafVar, make([]int32, len(nafFix)-len(nafVar))...) + } else if len(nafFix) < len(nafVar) { + nafFix = append(nafFix, make([]int32, len(nafVar)-len(nafFix))...) + } + + var TabQ [1 << (omegaVar - 2)]pointR2 + Q.oddMultiples(TabQ[:]) + P.SetIdentity() + for i := len(nafFix) - 1; i >= 0; i-- { + P.double() + // Generator point + if nafFix[i] != 0 { + idxM := absolute(nafFix[i]) >> 1 + R := tabVerif[idxM] + if nafFix[i] < 0 { + R.neg() + } + P.mixAdd(&R) + } + // Variable input point + if nafVar[i] != 0 { + idxN := absolute(nafVar[i]) >> 1 + S := TabQ[idxN] + if nafVar[i] < 0 { + S.neg() + } + P.add(&S) + } + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/ed25519/point.go b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/point.go new file mode 100644 index 0000000..d1c3b14 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/point.go @@ -0,0 +1,195 @@ +package ed25519 + +import fp "github.com/cloudflare/circl/math/fp25519" + +type ( + pointR1 struct{ x, y, z, ta, tb fp.Elt } + pointR2 struct { + pointR3 + z2 fp.Elt + } +) +type pointR3 struct{ addYX, subYX, dt2 fp.Elt } + +func (P *pointR1) neg() { + fp.Neg(&P.x, &P.x) + fp.Neg(&P.ta, &P.ta) +} + +func (P *pointR1) SetIdentity() { + P.x = fp.Elt{} + fp.SetOne(&P.y) + fp.SetOne(&P.z) + P.ta = fp.Elt{} + P.tb = fp.Elt{} +} + +func (P *pointR1) toAffine() { + fp.Inv(&P.z, &P.z) + fp.Mul(&P.x, &P.x, &P.z) + fp.Mul(&P.y, &P.y, &P.z) + fp.Modp(&P.x) + fp.Modp(&P.y) + fp.SetOne(&P.z) + P.ta = P.x + P.tb = P.y +} + +func (P *pointR1) ToBytes(k []byte) error { + P.toAffine() + var x [fp.Size]byte + err := fp.ToBytes(k[:fp.Size], &P.y) + if err != nil { + return err + } + err = fp.ToBytes(x[:], &P.x) + if err != nil { + return err + } + b := x[0] & 1 + k[paramB-1] = k[paramB-1] | (b << 7) + return nil +} + +func (P *pointR1) FromBytes(k []byte) bool { + if len(k) != paramB { + panic("wrong size") + } + signX := k[paramB-1] >> 7 + copy(P.y[:], k[:fp.Size]) + P.y[fp.Size-1] &= 0x7F + p := fp.P() + if !isLessThan(P.y[:], p[:]) { + return false + } + + one, u, v := &fp.Elt{}, &fp.Elt{}, &fp.Elt{} + fp.SetOne(one) + fp.Sqr(u, &P.y) // u = y^2 + fp.Mul(v, u, ¶mD) // v = dy^2 + fp.Sub(u, u, one) // u = y^2-1 + fp.Add(v, v, one) // v = dy^2+1 + isQR := fp.InvSqrt(&P.x, u, v) // x = sqrt(u/v) + if !isQR { + return false + } + fp.Modp(&P.x) // x = x mod p + if fp.IsZero(&P.x) && signX == 1 { + return false + } + if signX != (P.x[0] & 1) { + fp.Neg(&P.x, &P.x) + } + P.ta = P.x + P.tb = P.y + fp.SetOne(&P.z) + return true +} + +// double calculates 2P for curves with A=-1. +func (P *pointR1) double() { + Px, Py, Pz, Pta, Ptb := &P.x, &P.y, &P.z, &P.ta, &P.tb + a, b, c, e, f, g, h := Px, Py, Pz, Pta, Px, Py, Ptb + fp.Add(e, Px, Py) // x+y + fp.Sqr(a, Px) // A = x^2 + fp.Sqr(b, Py) // B = y^2 + fp.Sqr(c, Pz) // z^2 + fp.Add(c, c, c) // C = 2*z^2 + fp.Add(h, a, b) // H = A+B + fp.Sqr(e, e) // (x+y)^2 + fp.Sub(e, e, h) // E = (x+y)^2-A-B + fp.Sub(g, b, a) // G = B-A + fp.Sub(f, c, g) // F = C-G + fp.Mul(Pz, f, g) // Z = F * G + fp.Mul(Px, e, f) // X = E * F + fp.Mul(Py, g, h) // Y = G * H, T = E * H +} + +func (P *pointR1) mixAdd(Q *pointR3) { + fp.Add(&P.z, &P.z, &P.z) // D = 2*z1 + P.coreAddition(Q) +} + +func (P *pointR1) add(Q *pointR2) { + fp.Mul(&P.z, &P.z, &Q.z2) // D = 2*z1*z2 + P.coreAddition(&Q.pointR3) +} + +// coreAddition calculates P=P+Q for curves with A=-1. +func (P *pointR1) coreAddition(Q *pointR3) { + Px, Py, Pz, Pta, Ptb := &P.x, &P.y, &P.z, &P.ta, &P.tb + addYX2, subYX2, dt2 := &Q.addYX, &Q.subYX, &Q.dt2 + a, b, c, d, e, f, g, h := Px, Py, &fp.Elt{}, Pz, Pta, Px, Py, Ptb + fp.Mul(c, Pta, Ptb) // t1 = ta*tb + fp.Sub(h, Py, Px) // y1-x1 + fp.Add(b, Py, Px) // y1+x1 + fp.Mul(a, h, subYX2) // A = (y1-x1)*(y2-x2) + fp.Mul(b, b, addYX2) // B = (y1+x1)*(y2+x2) + fp.Mul(c, c, dt2) // C = 2*D*t1*t2 + fp.Sub(e, b, a) // E = B-A + fp.Add(h, b, a) // H = B+A + fp.Sub(f, d, c) // F = D-C + fp.Add(g, d, c) // G = D+C + fp.Mul(Pz, f, g) // Z = F * G + fp.Mul(Px, e, f) // X = E * F + fp.Mul(Py, g, h) // Y = G * H, T = E * H +} + +func (P *pointR1) oddMultiples(T []pointR2) { + var R pointR2 + n := len(T) + T[0].fromR1(P) + _2P := *P + _2P.double() + R.fromR1(&_2P) + for i := 1; i < n; i++ { + P.add(&R) + T[i].fromR1(P) + } +} + +func (P *pointR1) isEqual(Q *pointR1) bool { + l, r := &fp.Elt{}, &fp.Elt{} + fp.Mul(l, &P.x, &Q.z) + fp.Mul(r, &Q.x, &P.z) + fp.Sub(l, l, r) + b := fp.IsZero(l) + fp.Mul(l, &P.y, &Q.z) + fp.Mul(r, &Q.y, &P.z) + fp.Sub(l, l, r) + b = b && fp.IsZero(l) + fp.Mul(l, &P.ta, &P.tb) + fp.Mul(l, l, &Q.z) + fp.Mul(r, &Q.ta, &Q.tb) + fp.Mul(r, r, &P.z) + fp.Sub(l, l, r) + b = b && fp.IsZero(l) + return b && !fp.IsZero(&P.z) && !fp.IsZero(&Q.z) +} + +func (P *pointR3) neg() { + P.addYX, P.subYX = P.subYX, P.addYX + fp.Neg(&P.dt2, &P.dt2) +} + +func (P *pointR2) fromR1(Q *pointR1) { + fp.Add(&P.addYX, &Q.y, &Q.x) + fp.Sub(&P.subYX, &Q.y, &Q.x) + fp.Mul(&P.dt2, &Q.ta, &Q.tb) + fp.Mul(&P.dt2, &P.dt2, ¶mD) + fp.Add(&P.dt2, &P.dt2, &P.dt2) + fp.Add(&P.z2, &Q.z, &Q.z) +} + +func (P *pointR3) cneg(b int) { + t := &fp.Elt{} + fp.Cswap(&P.addYX, &P.subYX, uint(b)) + fp.Neg(t, &P.dt2) + fp.Cmov(&P.dt2, t, uint(b)) +} + +func (P *pointR3) cmov(Q *pointR3, b int) { + fp.Cmov(&P.addYX, &Q.addYX, uint(b)) + fp.Cmov(&P.subYX, &Q.subYX, uint(b)) + fp.Cmov(&P.dt2, &Q.dt2, uint(b)) +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/ed25519/pubkey.go b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/pubkey.go new file mode 100644 index 0000000..c3505b6 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/pubkey.go @@ -0,0 +1,9 @@ +//go:build go1.13 +// +build go1.13 + +package ed25519 + +import cryptoEd25519 "crypto/ed25519" + +// PublicKey is the type of Ed25519 public keys. +type PublicKey cryptoEd25519.PublicKey diff --git a/backend/vendor/github.com/cloudflare/circl/sign/ed25519/pubkey112.go b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/pubkey112.go new file mode 100644 index 0000000..d57d86e --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/pubkey112.go @@ -0,0 +1,7 @@ +//go:build !go1.13 +// +build !go1.13 + +package ed25519 + +// PublicKey is the type of Ed25519 public keys. +type PublicKey []byte diff --git a/backend/vendor/github.com/cloudflare/circl/sign/ed25519/signapi.go b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/signapi.go new file mode 100644 index 0000000..e4520f5 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/signapi.go @@ -0,0 +1,87 @@ +package ed25519 + +import ( + "crypto/rand" + "encoding/asn1" + + "github.com/cloudflare/circl/sign" +) + +var sch sign.Scheme = &scheme{} + +// Scheme returns a signature interface. +func Scheme() sign.Scheme { return sch } + +type scheme struct{} + +func (*scheme) Name() string { return "Ed25519" } +func (*scheme) PublicKeySize() int { return PublicKeySize } +func (*scheme) PrivateKeySize() int { return PrivateKeySize } +func (*scheme) SignatureSize() int { return SignatureSize } +func (*scheme) SeedSize() int { return SeedSize } +func (*scheme) TLSIdentifier() uint { return 0x0807 } +func (*scheme) SupportsContext() bool { return false } +func (*scheme) Oid() asn1.ObjectIdentifier { + return asn1.ObjectIdentifier{1, 3, 101, 112} +} + +func (*scheme) GenerateKey() (sign.PublicKey, sign.PrivateKey, error) { + return GenerateKey(rand.Reader) +} + +func (*scheme) Sign( + sk sign.PrivateKey, + message []byte, + opts *sign.SignatureOpts, +) []byte { + priv, ok := sk.(PrivateKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + panic(sign.ErrContextNotSupported) + } + return Sign(priv, message) +} + +func (*scheme) Verify( + pk sign.PublicKey, + message, signature []byte, + opts *sign.SignatureOpts, +) bool { + pub, ok := pk.(PublicKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil { + if opts.Context != "" { + panic(sign.ErrContextNotSupported) + } + } + return Verify(pub, message, signature) +} + +func (*scheme) DeriveKey(seed []byte) (sign.PublicKey, sign.PrivateKey) { + privateKey := NewKeyFromSeed(seed) + publicKey := make(PublicKey, PublicKeySize) + copy(publicKey, privateKey[SeedSize:]) + return publicKey, privateKey +} + +func (*scheme) UnmarshalBinaryPublicKey(buf []byte) (sign.PublicKey, error) { + if len(buf) < PublicKeySize { + return nil, sign.ErrPubKeySize + } + pub := make(PublicKey, PublicKeySize) + copy(pub, buf[:PublicKeySize]) + return pub, nil +} + +func (*scheme) UnmarshalBinaryPrivateKey(buf []byte) (sign.PrivateKey, error) { + if len(buf) < PrivateKeySize { + return nil, sign.ErrPrivKeySize + } + priv := make(PrivateKey, PrivateKeySize) + copy(priv, buf[:PrivateKeySize]) + return priv, nil +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/ed25519/tables.go b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/tables.go new file mode 100644 index 0000000..8763b42 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/ed25519/tables.go @@ -0,0 +1,213 @@ +package ed25519 + +import fp "github.com/cloudflare/circl/math/fp25519" + +var tabSign = [fxV][fx2w1]pointR3{ + { + pointR3{ + addYX: fp.Elt{0x85, 0x3b, 0x8c, 0xf5, 0xc6, 0x93, 0xbc, 0x2f, 0x19, 0x0e, 0x8c, 0xfb, 0xc6, 0x2d, 0x93, 0xcf, 0xc2, 0x42, 0x3d, 0x64, 0x98, 0x48, 0x0b, 0x27, 0x65, 0xba, 0xd4, 0x33, 0x3a, 0x9d, 0xcf, 0x07}, + subYX: fp.Elt{0x3e, 0x91, 0x40, 0xd7, 0x05, 0x39, 0x10, 0x9d, 0xb3, 0xbe, 0x40, 0xd1, 0x05, 0x9f, 0x39, 0xfd, 0x09, 0x8a, 0x8f, 0x68, 0x34, 0x84, 0xc1, 0xa5, 0x67, 0x12, 0xf8, 0x98, 0x92, 0x2f, 0xfd, 0x44}, + dt2: fp.Elt{0x68, 0xaa, 0x7a, 0x87, 0x05, 0x12, 0xc9, 0xab, 0x9e, 0xc4, 0xaa, 0xcc, 0x23, 0xe8, 0xd9, 0x26, 0x8c, 0x59, 0x43, 0xdd, 0xcb, 0x7d, 0x1b, 0x5a, 0xa8, 0x65, 0x0c, 0x9f, 0x68, 0x7b, 0x11, 0x6f}, + }, + { + addYX: fp.Elt{0x7c, 0xb0, 0x9e, 0xe6, 0xc5, 0xbf, 0xfa, 0x13, 0x8e, 0x0d, 0x22, 0xde, 0xc8, 0xd1, 0xce, 0x52, 0x02, 0xd5, 0x62, 0x31, 0x71, 0x0e, 0x8e, 0x9d, 0xb0, 0xd6, 0x00, 0xa5, 0x5a, 0x0e, 0xce, 0x72}, + subYX: fp.Elt{0x1a, 0x8e, 0x5c, 0xdc, 0xa4, 0xb3, 0x6c, 0x51, 0x18, 0xa0, 0x09, 0x80, 0x9a, 0x46, 0x33, 0xd5, 0xe0, 0x3c, 0x4d, 0x3b, 0xfc, 0x49, 0xa2, 0x43, 0x29, 0xe1, 0x29, 0xa9, 0x93, 0xea, 0x7c, 0x35}, + dt2: fp.Elt{0x08, 0x46, 0x6f, 0x68, 0x7f, 0x0b, 0x7c, 0x9e, 0xad, 0xba, 0x07, 0x61, 0x74, 0x83, 0x2f, 0xfc, 0x26, 0xd6, 0x09, 0xb9, 0x00, 0x34, 0x36, 0x4f, 0x01, 0xf3, 0x48, 0xdb, 0x43, 0xba, 0x04, 0x44}, + }, + { + addYX: fp.Elt{0x4c, 0xda, 0x0d, 0x13, 0x66, 0xfd, 0x82, 0x84, 0x9f, 0x75, 0x5b, 0xa2, 0x17, 0xfe, 0x34, 0xbf, 0x1f, 0xcb, 0xba, 0x90, 0x55, 0x80, 0x83, 0xfd, 0x63, 0xb9, 0x18, 0xf8, 0x5b, 0x5d, 0x94, 0x1e}, + subYX: fp.Elt{0xb9, 0xdb, 0x6c, 0x04, 0x88, 0x22, 0xd8, 0x79, 0x83, 0x2f, 0x8d, 0x65, 0x6b, 0xd2, 0xab, 0x1b, 0xdd, 0x65, 0xe5, 0x93, 0x63, 0xf8, 0xa2, 0xd8, 0x3c, 0xf1, 0x4b, 0xc5, 0x99, 0xd1, 0xf2, 0x12}, + dt2: fp.Elt{0x05, 0x4c, 0xb8, 0x3b, 0xfe, 0xf5, 0x9f, 0x2e, 0xd1, 0xb2, 0xb8, 0xff, 0xfe, 0x6d, 0xd9, 0x37, 0xe0, 0xae, 0xb4, 0x5a, 0x51, 0x80, 0x7e, 0x9b, 0x1d, 0xd1, 0x8d, 0x8c, 0x56, 0xb1, 0x84, 0x35}, + }, + { + addYX: fp.Elt{0x39, 0x71, 0x43, 0x34, 0xe3, 0x42, 0x45, 0xa1, 0xf2, 0x68, 0x71, 0xa7, 0xe8, 0x23, 0xfd, 0x9f, 0x86, 0x48, 0xff, 0xe5, 0x96, 0x74, 0xcf, 0x05, 0x49, 0xe2, 0xb3, 0x6c, 0x17, 0x77, 0x2f, 0x6d}, + subYX: fp.Elt{0x73, 0x3f, 0xc1, 0xc7, 0x6a, 0x66, 0xa1, 0x20, 0xdd, 0x11, 0xfb, 0x7a, 0x6e, 0xa8, 0x51, 0xb8, 0x3f, 0x9d, 0xa2, 0x97, 0x84, 0xb5, 0xc7, 0x90, 0x7c, 0xab, 0x48, 0xd6, 0x84, 0xa3, 0xd5, 0x1a}, + dt2: fp.Elt{0x63, 0x27, 0x3c, 0x49, 0x4b, 0xfc, 0x22, 0xf2, 0x0b, 0x50, 0xc2, 0x0f, 0xb4, 0x1f, 0x31, 0x0c, 0x2f, 0x53, 0xab, 0xaa, 0x75, 0x6f, 0xe0, 0x69, 0x39, 0x56, 0xe0, 0x3b, 0xb7, 0xa8, 0xbf, 0x45}, + }, + }, + { + { + addYX: fp.Elt{0x00, 0x45, 0xd9, 0x0d, 0x58, 0x03, 0xfc, 0x29, 0x93, 0xec, 0xbb, 0x6f, 0xa4, 0x7a, 0xd2, 0xec, 0xf8, 0xa7, 0xe2, 0xc2, 0x5f, 0x15, 0x0a, 0x13, 0xd5, 0xa1, 0x06, 0xb7, 0x1a, 0x15, 0x6b, 0x41}, + subYX: fp.Elt{0x85, 0x8c, 0xb2, 0x17, 0xd6, 0x3b, 0x0a, 0xd3, 0xea, 0x3b, 0x77, 0x39, 0xb7, 0x77, 0xd3, 0xc5, 0xbf, 0x5c, 0x6a, 0x1e, 0x8c, 0xe7, 0xc6, 0xc6, 0xc4, 0xb7, 0x2a, 0x8b, 0xf7, 0xb8, 0x61, 0x0d}, + dt2: fp.Elt{0xb0, 0x36, 0xc1, 0xe9, 0xef, 0xd7, 0xa8, 0x56, 0x20, 0x4b, 0xe4, 0x58, 0xcd, 0xe5, 0x07, 0xbd, 0xab, 0xe0, 0x57, 0x1b, 0xda, 0x2f, 0xe6, 0xaf, 0xd2, 0xe8, 0x77, 0x42, 0xf7, 0x2a, 0x1a, 0x19}, + }, + { + addYX: fp.Elt{0x6a, 0x6d, 0x6d, 0xd1, 0xfa, 0xf5, 0x03, 0x30, 0xbd, 0x6d, 0xc2, 0xc8, 0xf5, 0x38, 0x80, 0x4f, 0xb2, 0xbe, 0xa1, 0x76, 0x50, 0x1a, 0x73, 0xf2, 0x78, 0x2b, 0x8e, 0x3a, 0x1e, 0x34, 0x47, 0x7b}, + subYX: fp.Elt{0xc3, 0x2c, 0x36, 0xdc, 0xc5, 0x45, 0xbc, 0xef, 0x1b, 0x64, 0xd6, 0x65, 0x28, 0xe9, 0xda, 0x84, 0x13, 0xbe, 0x27, 0x8e, 0x3f, 0x98, 0x2a, 0x37, 0xee, 0x78, 0x97, 0xd6, 0xc0, 0x6f, 0xb4, 0x53}, + dt2: fp.Elt{0x58, 0x5d, 0xa7, 0xa3, 0x68, 0xbb, 0x20, 0x30, 0x2e, 0x03, 0xe9, 0xb1, 0xd4, 0x90, 0x72, 0xe3, 0x71, 0xb2, 0x36, 0x3e, 0x73, 0xa0, 0x2e, 0x3d, 0xd1, 0x85, 0x33, 0x62, 0x4e, 0xa7, 0x7b, 0x31}, + }, + { + addYX: fp.Elt{0xbf, 0xc4, 0x38, 0x53, 0xfb, 0x68, 0xa9, 0x77, 0xce, 0x55, 0xf9, 0x05, 0xcb, 0xeb, 0xfb, 0x8c, 0x46, 0xc2, 0x32, 0x7c, 0xf0, 0xdb, 0xd7, 0x2c, 0x62, 0x8e, 0xdd, 0x54, 0x75, 0xcf, 0x3f, 0x33}, + subYX: fp.Elt{0x49, 0x50, 0x1f, 0x4e, 0x6e, 0x55, 0x55, 0xde, 0x8c, 0x4e, 0x77, 0x96, 0x38, 0x3b, 0xfe, 0xb6, 0x43, 0x3c, 0x86, 0x69, 0xc2, 0x72, 0x66, 0x1f, 0x6b, 0xf9, 0x87, 0xbc, 0x4f, 0x37, 0x3e, 0x3c}, + dt2: fp.Elt{0xd2, 0x2f, 0x06, 0x6b, 0x08, 0x07, 0x69, 0x77, 0xc0, 0x94, 0xcc, 0xae, 0x43, 0x00, 0x59, 0x6e, 0xa3, 0x63, 0xa8, 0xdd, 0xfa, 0x24, 0x18, 0xd0, 0x35, 0xc7, 0x78, 0xf7, 0x0d, 0xd4, 0x5a, 0x1e}, + }, + { + addYX: fp.Elt{0x45, 0xc1, 0x17, 0x51, 0xf8, 0xed, 0x7e, 0xc7, 0xa9, 0x1a, 0x11, 0x6e, 0x2d, 0xef, 0x0b, 0xd5, 0x3f, 0x98, 0xb0, 0xa3, 0x9d, 0x65, 0xf1, 0xcd, 0x53, 0x4a, 0x8a, 0x18, 0x70, 0x0a, 0x7f, 0x23}, + subYX: fp.Elt{0xdd, 0xef, 0xbe, 0x3a, 0x31, 0xe0, 0xbc, 0xbe, 0x6d, 0x5d, 0x79, 0x87, 0xd6, 0xbe, 0x68, 0xe3, 0x59, 0x76, 0x8c, 0x86, 0x0e, 0x7a, 0x92, 0x13, 0x14, 0x8f, 0x67, 0xb3, 0xcb, 0x1a, 0x76, 0x76}, + dt2: fp.Elt{0x56, 0x7a, 0x1c, 0x9d, 0xca, 0x96, 0xf9, 0xf9, 0x03, 0x21, 0xd4, 0xe8, 0xb3, 0xd5, 0xe9, 0x52, 0xc8, 0x54, 0x1e, 0x1b, 0x13, 0xb6, 0xfd, 0x47, 0x7d, 0x02, 0x32, 0x33, 0x27, 0xe2, 0x1f, 0x19}, + }, + }, +} + +var tabVerif = [1 << (omegaFix - 2)]pointR3{ + { /* 1P */ + addYX: fp.Elt{0x85, 0x3b, 0x8c, 0xf5, 0xc6, 0x93, 0xbc, 0x2f, 0x19, 0x0e, 0x8c, 0xfb, 0xc6, 0x2d, 0x93, 0xcf, 0xc2, 0x42, 0x3d, 0x64, 0x98, 0x48, 0x0b, 0x27, 0x65, 0xba, 0xd4, 0x33, 0x3a, 0x9d, 0xcf, 0x07}, + subYX: fp.Elt{0x3e, 0x91, 0x40, 0xd7, 0x05, 0x39, 0x10, 0x9d, 0xb3, 0xbe, 0x40, 0xd1, 0x05, 0x9f, 0x39, 0xfd, 0x09, 0x8a, 0x8f, 0x68, 0x34, 0x84, 0xc1, 0xa5, 0x67, 0x12, 0xf8, 0x98, 0x92, 0x2f, 0xfd, 0x44}, + dt2: fp.Elt{0x68, 0xaa, 0x7a, 0x87, 0x05, 0x12, 0xc9, 0xab, 0x9e, 0xc4, 0xaa, 0xcc, 0x23, 0xe8, 0xd9, 0x26, 0x8c, 0x59, 0x43, 0xdd, 0xcb, 0x7d, 0x1b, 0x5a, 0xa8, 0x65, 0x0c, 0x9f, 0x68, 0x7b, 0x11, 0x6f}, + }, + { /* 3P */ + addYX: fp.Elt{0x30, 0x97, 0xee, 0x4c, 0xa8, 0xb0, 0x25, 0xaf, 0x8a, 0x4b, 0x86, 0xe8, 0x30, 0x84, 0x5a, 0x02, 0x32, 0x67, 0x01, 0x9f, 0x02, 0x50, 0x1b, 0xc1, 0xf4, 0xf8, 0x80, 0x9a, 0x1b, 0x4e, 0x16, 0x7a}, + subYX: fp.Elt{0x65, 0xd2, 0xfc, 0xa4, 0xe8, 0x1f, 0x61, 0x56, 0x7d, 0xba, 0xc1, 0xe5, 0xfd, 0x53, 0xd3, 0x3b, 0xbd, 0xd6, 0x4b, 0x21, 0x1a, 0xf3, 0x31, 0x81, 0x62, 0xda, 0x5b, 0x55, 0x87, 0x15, 0xb9, 0x2a}, + dt2: fp.Elt{0x89, 0xd8, 0xd0, 0x0d, 0x3f, 0x93, 0xae, 0x14, 0x62, 0xda, 0x35, 0x1c, 0x22, 0x23, 0x94, 0x58, 0x4c, 0xdb, 0xf2, 0x8c, 0x45, 0xe5, 0x70, 0xd1, 0xc6, 0xb4, 0xb9, 0x12, 0xaf, 0x26, 0x28, 0x5a}, + }, + { /* 5P */ + addYX: fp.Elt{0x33, 0xbb, 0xa5, 0x08, 0x44, 0xbc, 0x12, 0xa2, 0x02, 0xed, 0x5e, 0xc7, 0xc3, 0x48, 0x50, 0x8d, 0x44, 0xec, 0xbf, 0x5a, 0x0c, 0xeb, 0x1b, 0xdd, 0xeb, 0x06, 0xe2, 0x46, 0xf1, 0xcc, 0x45, 0x29}, + subYX: fp.Elt{0xba, 0xd6, 0x47, 0xa4, 0xc3, 0x82, 0x91, 0x7f, 0xb7, 0x29, 0x27, 0x4b, 0xd1, 0x14, 0x00, 0xd5, 0x87, 0xa0, 0x64, 0xb8, 0x1c, 0xf1, 0x3c, 0xe3, 0xf3, 0x55, 0x1b, 0xeb, 0x73, 0x7e, 0x4a, 0x15}, + dt2: fp.Elt{0x85, 0x82, 0x2a, 0x81, 0xf1, 0xdb, 0xbb, 0xbc, 0xfc, 0xd1, 0xbd, 0xd0, 0x07, 0x08, 0x0e, 0x27, 0x2d, 0xa7, 0xbd, 0x1b, 0x0b, 0x67, 0x1b, 0xb4, 0x9a, 0xb6, 0x3b, 0x6b, 0x69, 0xbe, 0xaa, 0x43}, + }, + { /* 7P */ + addYX: fp.Elt{0xbf, 0xa3, 0x4e, 0x94, 0xd0, 0x5c, 0x1a, 0x6b, 0xd2, 0xc0, 0x9d, 0xb3, 0x3a, 0x35, 0x70, 0x74, 0x49, 0x2e, 0x54, 0x28, 0x82, 0x52, 0xb2, 0x71, 0x7e, 0x92, 0x3c, 0x28, 0x69, 0xea, 0x1b, 0x46}, + subYX: fp.Elt{0xb1, 0x21, 0x32, 0xaa, 0x9a, 0x2c, 0x6f, 0xba, 0xa7, 0x23, 0xba, 0x3b, 0x53, 0x21, 0xa0, 0x6c, 0x3a, 0x2c, 0x19, 0x92, 0x4f, 0x76, 0xea, 0x9d, 0xe0, 0x17, 0x53, 0x2e, 0x5d, 0xdd, 0x6e, 0x1d}, + dt2: fp.Elt{0xa2, 0xb3, 0xb8, 0x01, 0xc8, 0x6d, 0x83, 0xf1, 0x9a, 0xa4, 0x3e, 0x05, 0x47, 0x5f, 0x03, 0xb3, 0xf3, 0xad, 0x77, 0x58, 0xba, 0x41, 0x9c, 0x52, 0xa7, 0x90, 0x0f, 0x6a, 0x1c, 0xbb, 0x9f, 0x7a}, + }, + { /* 9P */ + addYX: fp.Elt{0x2f, 0x63, 0xa8, 0xa6, 0x8a, 0x67, 0x2e, 0x9b, 0xc5, 0x46, 0xbc, 0x51, 0x6f, 0x9e, 0x50, 0xa6, 0xb5, 0xf5, 0x86, 0xc6, 0xc9, 0x33, 0xb2, 0xce, 0x59, 0x7f, 0xdd, 0x8a, 0x33, 0xed, 0xb9, 0x34}, + subYX: fp.Elt{0x64, 0x80, 0x9d, 0x03, 0x7e, 0x21, 0x6e, 0xf3, 0x9b, 0x41, 0x20, 0xf5, 0xb6, 0x81, 0xa0, 0x98, 0x44, 0xb0, 0x5e, 0xe7, 0x08, 0xc6, 0xcb, 0x96, 0x8f, 0x9c, 0xdc, 0xfa, 0x51, 0x5a, 0xc0, 0x49}, + dt2: fp.Elt{0x1b, 0xaf, 0x45, 0x90, 0xbf, 0xe8, 0xb4, 0x06, 0x2f, 0xd2, 0x19, 0xa7, 0xe8, 0x83, 0xff, 0xe2, 0x16, 0xcf, 0xd4, 0x93, 0x29, 0xfc, 0xf6, 0xaa, 0x06, 0x8b, 0x00, 0x1b, 0x02, 0x72, 0xc1, 0x73}, + }, + { /* 11P */ + addYX: fp.Elt{0xde, 0x2a, 0x80, 0x8a, 0x84, 0x00, 0xbf, 0x2f, 0x27, 0x2e, 0x30, 0x02, 0xcf, 0xfe, 0xd9, 0xe5, 0x06, 0x34, 0x70, 0x17, 0x71, 0x84, 0x3e, 0x11, 0xaf, 0x8f, 0x6d, 0x54, 0xe2, 0xaa, 0x75, 0x42}, + subYX: fp.Elt{0x48, 0x43, 0x86, 0x49, 0x02, 0x5b, 0x5f, 0x31, 0x81, 0x83, 0x08, 0x77, 0x69, 0xb3, 0xd6, 0x3e, 0x95, 0xeb, 0x8d, 0x6a, 0x55, 0x75, 0xa0, 0xa3, 0x7f, 0xc7, 0xd5, 0x29, 0x80, 0x59, 0xab, 0x18}, + dt2: fp.Elt{0xe9, 0x89, 0x60, 0xfd, 0xc5, 0x2c, 0x2b, 0xd8, 0xa4, 0xe4, 0x82, 0x32, 0xa1, 0xb4, 0x1e, 0x03, 0x22, 0x86, 0x1a, 0xb5, 0x99, 0x11, 0x31, 0x44, 0x48, 0xf9, 0x3d, 0xb5, 0x22, 0x55, 0xc6, 0x3d}, + }, + { /* 13P */ + addYX: fp.Elt{0x6d, 0x7f, 0x00, 0xa2, 0x22, 0xc2, 0x70, 0xbf, 0xdb, 0xde, 0xbc, 0xb5, 0x9a, 0xb3, 0x84, 0xbf, 0x07, 0xba, 0x07, 0xfb, 0x12, 0x0e, 0x7a, 0x53, 0x41, 0xf2, 0x46, 0xc3, 0xee, 0xd7, 0x4f, 0x23}, + subYX: fp.Elt{0x93, 0xbf, 0x7f, 0x32, 0x3b, 0x01, 0x6f, 0x50, 0x6b, 0x6f, 0x77, 0x9b, 0xc9, 0xeb, 0xfc, 0xae, 0x68, 0x59, 0xad, 0xaa, 0x32, 0xb2, 0x12, 0x9d, 0xa7, 0x24, 0x60, 0x17, 0x2d, 0x88, 0x67, 0x02}, + dt2: fp.Elt{0x78, 0xa3, 0x2e, 0x73, 0x19, 0xa1, 0x60, 0x53, 0x71, 0xd4, 0x8d, 0xdf, 0xb1, 0xe6, 0x37, 0x24, 0x33, 0xe5, 0xa7, 0x91, 0xf8, 0x37, 0xef, 0xa2, 0x63, 0x78, 0x09, 0xaa, 0xfd, 0xa6, 0x7b, 0x49}, + }, + { /* 15P */ + addYX: fp.Elt{0xa0, 0xea, 0xcf, 0x13, 0x03, 0xcc, 0xce, 0x24, 0x6d, 0x24, 0x9c, 0x18, 0x8d, 0xc2, 0x48, 0x86, 0xd0, 0xd4, 0xf2, 0xc1, 0xfa, 0xbd, 0xbd, 0x2d, 0x2b, 0xe7, 0x2d, 0xf1, 0x17, 0x29, 0xe2, 0x61}, + subYX: fp.Elt{0x0b, 0xcf, 0x8c, 0x46, 0x86, 0xcd, 0x0b, 0x04, 0xd6, 0x10, 0x99, 0x2a, 0xa4, 0x9b, 0x82, 0xd3, 0x92, 0x51, 0xb2, 0x07, 0x08, 0x30, 0x08, 0x75, 0xbf, 0x5e, 0xd0, 0x18, 0x42, 0xcd, 0xb5, 0x43}, + dt2: fp.Elt{0x16, 0xb5, 0xd0, 0x9b, 0x2f, 0x76, 0x9a, 0x5d, 0xee, 0xde, 0x3f, 0x37, 0x4e, 0xaf, 0x38, 0xeb, 0x70, 0x42, 0xd6, 0x93, 0x7d, 0x5a, 0x2e, 0x03, 0x42, 0xd8, 0xe4, 0x0a, 0x21, 0x61, 0x1d, 0x51}, + }, + { /* 17P */ + addYX: fp.Elt{0x81, 0x9d, 0x0e, 0x95, 0xef, 0x76, 0xc6, 0x92, 0x4f, 0x04, 0xd7, 0xc0, 0xcd, 0x20, 0x46, 0xa5, 0x48, 0x12, 0x8f, 0x6f, 0x64, 0x36, 0x9b, 0xaa, 0xe3, 0x55, 0xb8, 0xdd, 0x24, 0x59, 0x32, 0x6d}, + subYX: fp.Elt{0x87, 0xde, 0x20, 0x44, 0x48, 0x86, 0x13, 0x08, 0xb4, 0xed, 0x92, 0xb5, 0x16, 0xf0, 0x1c, 0x8a, 0x25, 0x2d, 0x94, 0x29, 0x27, 0x4e, 0xfa, 0x39, 0x10, 0x28, 0x48, 0xe2, 0x6f, 0xfe, 0xa7, 0x71}, + dt2: fp.Elt{0x54, 0xc8, 0xc8, 0xa5, 0xb8, 0x82, 0x71, 0x6c, 0x03, 0x2a, 0x5f, 0xfe, 0x79, 0x14, 0xfd, 0x33, 0x0c, 0x8d, 0x77, 0x83, 0x18, 0x59, 0xcf, 0x72, 0xa9, 0xea, 0x9e, 0x55, 0xb6, 0xc4, 0x46, 0x47}, + }, + { /* 19P */ + addYX: fp.Elt{0x2b, 0x9a, 0xc6, 0x6d, 0x3c, 0x7b, 0x77, 0xd3, 0x17, 0xf6, 0x89, 0x6f, 0x27, 0xb2, 0xfa, 0xde, 0xb5, 0x16, 0x3a, 0xb5, 0xf7, 0x1c, 0x65, 0x45, 0xb7, 0x9f, 0xfe, 0x34, 0xde, 0x51, 0x9a, 0x5c}, + subYX: fp.Elt{0x47, 0x11, 0x74, 0x64, 0xc8, 0x46, 0x85, 0x34, 0x49, 0xc8, 0xfc, 0x0e, 0xdd, 0xae, 0x35, 0x7d, 0x32, 0xa3, 0x72, 0x06, 0x76, 0x9a, 0x93, 0xff, 0xd6, 0xe6, 0xb5, 0x7d, 0x49, 0x63, 0x96, 0x21}, + dt2: fp.Elt{0x67, 0x0e, 0xf1, 0x79, 0xcf, 0xf1, 0x10, 0xf5, 0x5b, 0x51, 0x58, 0xe6, 0xa1, 0xda, 0xdd, 0xff, 0x77, 0x22, 0x14, 0x10, 0x17, 0xa7, 0xc3, 0x09, 0xbb, 0x23, 0x82, 0x60, 0x3c, 0x50, 0x04, 0x48}, + }, + { /* 21P */ + addYX: fp.Elt{0xc7, 0x7f, 0xa3, 0x2c, 0xd0, 0x9e, 0x24, 0xc4, 0xab, 0xac, 0x15, 0xa6, 0xe3, 0xa0, 0x59, 0xa0, 0x23, 0x0e, 0x6e, 0xc9, 0xd7, 0x6e, 0xa9, 0x88, 0x6d, 0x69, 0x50, 0x16, 0xa5, 0x98, 0x33, 0x55}, + subYX: fp.Elt{0x75, 0xd1, 0x36, 0x3a, 0xd2, 0x21, 0x68, 0x3b, 0x32, 0x9e, 0x9b, 0xe9, 0xa7, 0x0a, 0xb4, 0xbb, 0x47, 0x8a, 0x83, 0x20, 0xe4, 0x5c, 0x9e, 0x5d, 0x5e, 0x4c, 0xde, 0x58, 0x88, 0x09, 0x1e, 0x77}, + dt2: fp.Elt{0xdf, 0x1e, 0x45, 0x78, 0xd2, 0xf5, 0x12, 0x9a, 0xcb, 0x9c, 0x89, 0x85, 0x79, 0x5d, 0xda, 0x3a, 0x08, 0x95, 0xa5, 0x9f, 0x2d, 0x4a, 0x7f, 0x47, 0x11, 0xa6, 0xf5, 0x8f, 0xd6, 0xd1, 0x5e, 0x5a}, + }, + { /* 23P */ + addYX: fp.Elt{0x83, 0x0e, 0x15, 0xfe, 0x2a, 0x12, 0x95, 0x11, 0xd8, 0x35, 0x4b, 0x7e, 0x25, 0x9a, 0x20, 0xcf, 0x20, 0x1e, 0x71, 0x1e, 0x29, 0xf8, 0x87, 0x73, 0xf0, 0x92, 0xbf, 0xd8, 0x97, 0xb8, 0xac, 0x44}, + subYX: fp.Elt{0x59, 0x73, 0x52, 0x58, 0xc5, 0xe0, 0xe5, 0xba, 0x7e, 0x9d, 0xdb, 0xca, 0x19, 0x5c, 0x2e, 0x39, 0xe9, 0xab, 0x1c, 0xda, 0x1e, 0x3c, 0x65, 0x28, 0x44, 0xdc, 0xef, 0x5f, 0x13, 0x60, 0x9b, 0x01}, + dt2: fp.Elt{0x83, 0x4b, 0x13, 0x5e, 0x14, 0x68, 0x60, 0x1e, 0x16, 0x4c, 0x30, 0x24, 0x4f, 0xe6, 0xf5, 0xc4, 0xd7, 0x3e, 0x1a, 0xfc, 0xa8, 0x88, 0x6e, 0x50, 0x92, 0x2f, 0xad, 0xe6, 0xfd, 0x49, 0x0c, 0x15}, + }, + { /* 25P */ + addYX: fp.Elt{0x38, 0x11, 0x47, 0x09, 0x95, 0xf2, 0x7b, 0x8e, 0x51, 0xa6, 0x75, 0x4f, 0x39, 0xef, 0x6f, 0x5d, 0xad, 0x08, 0xa7, 0x25, 0xc4, 0x79, 0xaf, 0x10, 0x22, 0x99, 0xb9, 0x5b, 0x07, 0x5a, 0x2b, 0x6b}, + subYX: fp.Elt{0x68, 0xa8, 0xdc, 0x9c, 0x3c, 0x86, 0x49, 0xb8, 0xd0, 0x4a, 0x71, 0xb8, 0xdb, 0x44, 0x3f, 0xc8, 0x8d, 0x16, 0x36, 0x0c, 0x56, 0xe3, 0x3e, 0xfe, 0xc1, 0xfb, 0x05, 0x1e, 0x79, 0xd7, 0xa6, 0x78}, + dt2: fp.Elt{0x76, 0xb9, 0xa0, 0x47, 0x4b, 0x70, 0xbf, 0x58, 0xd5, 0x48, 0x17, 0x74, 0x55, 0xb3, 0x01, 0xa6, 0x90, 0xf5, 0x42, 0xd5, 0xb1, 0x1f, 0x2b, 0xaa, 0x00, 0x5d, 0xd5, 0x4a, 0xfc, 0x7f, 0x5c, 0x72}, + }, + { /* 27P */ + addYX: fp.Elt{0xb2, 0x99, 0xcf, 0xd1, 0x15, 0x67, 0x42, 0xe4, 0x34, 0x0d, 0xa2, 0x02, 0x11, 0xd5, 0x52, 0x73, 0x9f, 0x10, 0x12, 0x8b, 0x7b, 0x15, 0xd1, 0x23, 0xa3, 0xf3, 0xb1, 0x7c, 0x27, 0xc9, 0x4c, 0x79}, + subYX: fp.Elt{0xc0, 0x98, 0xd0, 0x1c, 0xf7, 0x2b, 0x80, 0x91, 0x66, 0x63, 0x5e, 0xed, 0xa4, 0x6c, 0x41, 0xfe, 0x4c, 0x99, 0x02, 0x49, 0x71, 0x5d, 0x58, 0xdf, 0xe7, 0xfa, 0x55, 0xf8, 0x25, 0x46, 0xd5, 0x4c}, + dt2: fp.Elt{0x53, 0x50, 0xac, 0xc2, 0x26, 0xc4, 0xf6, 0x4a, 0x58, 0x72, 0xf6, 0x32, 0xad, 0xed, 0x9a, 0xbc, 0x21, 0x10, 0x31, 0x0a, 0xf1, 0x32, 0xd0, 0x2a, 0x85, 0x8e, 0xcc, 0x6f, 0x7b, 0x35, 0x08, 0x70}, + }, + { /* 29P */ + addYX: fp.Elt{0x01, 0x3f, 0x77, 0x38, 0x27, 0x67, 0x88, 0x0b, 0xfb, 0xcc, 0xfb, 0x95, 0xfa, 0xc8, 0xcc, 0xb8, 0xb6, 0x29, 0xad, 0xb9, 0xa3, 0xd5, 0x2d, 0x8d, 0x6a, 0x0f, 0xad, 0x51, 0x98, 0x7e, 0xef, 0x06}, + subYX: fp.Elt{0x34, 0x4a, 0x58, 0x82, 0xbb, 0x9f, 0x1b, 0xd0, 0x2b, 0x79, 0xb4, 0xd2, 0x63, 0x64, 0xab, 0x47, 0x02, 0x62, 0x53, 0x48, 0x9c, 0x63, 0x31, 0xb6, 0x28, 0xd4, 0xd6, 0x69, 0x36, 0x2a, 0xa9, 0x13}, + dt2: fp.Elt{0xe5, 0x7d, 0x57, 0xc0, 0x1c, 0x77, 0x93, 0xca, 0x5c, 0xdc, 0x35, 0x50, 0x1e, 0xe4, 0x40, 0x75, 0x71, 0xe0, 0x02, 0xd8, 0x01, 0x0f, 0x68, 0x24, 0x6a, 0xf8, 0x2a, 0x8a, 0xdf, 0x6d, 0x29, 0x3c}, + }, + { /* 31P */ + addYX: fp.Elt{0x13, 0xa7, 0x14, 0xd9, 0xf9, 0x15, 0xad, 0xae, 0x12, 0xf9, 0x8f, 0x8c, 0xf9, 0x7b, 0x2f, 0xa9, 0x30, 0xd7, 0x53, 0x9f, 0x17, 0x23, 0xf8, 0xaf, 0xba, 0x77, 0x0c, 0x49, 0x93, 0xd3, 0x99, 0x7a}, + subYX: fp.Elt{0x41, 0x25, 0x1f, 0xbb, 0x2e, 0x4d, 0xeb, 0xfc, 0x1f, 0xb9, 0xad, 0x40, 0xc7, 0x10, 0x95, 0xb8, 0x05, 0xad, 0xa1, 0xd0, 0x7d, 0xa3, 0x71, 0xfc, 0x7b, 0x71, 0x47, 0x07, 0x70, 0x2c, 0x89, 0x0a}, + dt2: fp.Elt{0xe8, 0xa3, 0xbd, 0x36, 0x24, 0xed, 0x52, 0x8f, 0x94, 0x07, 0xe8, 0x57, 0x41, 0xc8, 0xa8, 0x77, 0xe0, 0x9c, 0x2f, 0x26, 0x63, 0x65, 0xa9, 0xa5, 0xd2, 0xf7, 0x02, 0x83, 0xd2, 0x62, 0x67, 0x28}, + }, + { /* 33P */ + addYX: fp.Elt{0x25, 0x5b, 0xe3, 0x3c, 0x09, 0x36, 0x78, 0x4e, 0x97, 0xaa, 0x6b, 0xb2, 0x1d, 0x18, 0xe1, 0x82, 0x3f, 0xb8, 0xc7, 0xcb, 0xd3, 0x92, 0xc1, 0x0c, 0x3a, 0x9d, 0x9d, 0x6a, 0x04, 0xda, 0xf1, 0x32}, + subYX: fp.Elt{0xbd, 0xf5, 0x2e, 0xce, 0x2b, 0x8e, 0x55, 0x7c, 0x63, 0xbc, 0x47, 0x67, 0xb4, 0x6c, 0x98, 0xe4, 0xb8, 0x89, 0xbb, 0x3b, 0x9f, 0x17, 0x4a, 0x15, 0x7a, 0x76, 0xf1, 0xd6, 0xa3, 0xf2, 0x86, 0x76}, + dt2: fp.Elt{0x6a, 0x7c, 0x59, 0x6d, 0xa6, 0x12, 0x8d, 0xaa, 0x2b, 0x85, 0xd3, 0x04, 0x03, 0x93, 0x11, 0x8f, 0x22, 0xb0, 0x09, 0xc2, 0x73, 0xdc, 0x91, 0x3f, 0xa6, 0x28, 0xad, 0xa9, 0xf8, 0x05, 0x13, 0x56}, + }, + { /* 35P */ + addYX: fp.Elt{0xd1, 0xae, 0x92, 0xec, 0x8d, 0x97, 0x0c, 0x10, 0xe5, 0x73, 0x6d, 0x4d, 0x43, 0xd5, 0x43, 0xca, 0x48, 0xba, 0x47, 0xd8, 0x22, 0x1b, 0x13, 0x83, 0x2c, 0x4d, 0x5d, 0xe3, 0x53, 0xec, 0xaa}, + subYX: fp.Elt{0xd5, 0xc0, 0xb0, 0xe7, 0x28, 0xcc, 0x22, 0x67, 0x53, 0x5c, 0x07, 0xdb, 0xbb, 0xe9, 0x9d, 0x70, 0x61, 0x0a, 0x01, 0xd7, 0xa7, 0x8d, 0xf6, 0xca, 0x6c, 0xcc, 0x57, 0x2c, 0xef, 0x1a, 0x0a, 0x03}, + dt2: fp.Elt{0xaa, 0xd2, 0x3a, 0x00, 0x73, 0xf7, 0xb1, 0x7b, 0x08, 0x66, 0x21, 0x2b, 0x80, 0x29, 0x3f, 0x0b, 0x3e, 0xd2, 0x0e, 0x52, 0x86, 0xdc, 0x21, 0x78, 0x80, 0x54, 0x06, 0x24, 0x1c, 0x9c, 0xbe, 0x20}, + }, + { /* 37P */ + addYX: fp.Elt{0xa6, 0x73, 0x96, 0x24, 0xd8, 0x87, 0x53, 0xe1, 0x93, 0xe4, 0x46, 0xf5, 0x2d, 0xbc, 0x43, 0x59, 0xb5, 0x63, 0x6f, 0xc3, 0x81, 0x9a, 0x7f, 0x1c, 0xde, 0xc1, 0x0a, 0x1f, 0x36, 0xb3, 0x0a, 0x75}, + subYX: fp.Elt{0x60, 0x5e, 0x02, 0xe2, 0x4a, 0xe4, 0xe0, 0x20, 0x38, 0xb9, 0xdc, 0xcb, 0x2f, 0x3b, 0x3b, 0xb0, 0x1c, 0x0d, 0x5a, 0xf9, 0x9c, 0x63, 0x5d, 0x10, 0x11, 0xe3, 0x67, 0x50, 0x54, 0x4c, 0x76, 0x69}, + dt2: fp.Elt{0x37, 0x10, 0xf8, 0xa2, 0x83, 0x32, 0x8a, 0x1e, 0xf1, 0xcb, 0x7f, 0xbd, 0x23, 0xda, 0x2e, 0x6f, 0x63, 0x25, 0x2e, 0xac, 0x5b, 0xd1, 0x2f, 0xb7, 0x40, 0x50, 0x07, 0xb7, 0x3f, 0x6b, 0xf9, 0x54}, + }, + { /* 39P */ + addYX: fp.Elt{0x79, 0x92, 0x66, 0x29, 0x04, 0xf2, 0xad, 0x0f, 0x4a, 0x72, 0x7d, 0x7d, 0x04, 0xa2, 0xdd, 0x3a, 0xf1, 0x60, 0x57, 0x8c, 0x82, 0x94, 0x3d, 0x6f, 0x9e, 0x53, 0xb7, 0x2b, 0xc5, 0xe9, 0x7f, 0x3d}, + subYX: fp.Elt{0xcd, 0x1e, 0xb1, 0x16, 0xc6, 0xaf, 0x7d, 0x17, 0x79, 0x64, 0x57, 0xfa, 0x9c, 0x4b, 0x76, 0x89, 0x85, 0xe7, 0xec, 0xe6, 0x10, 0xa1, 0xa8, 0xb7, 0xf0, 0xdb, 0x85, 0xbe, 0x9f, 0x83, 0xe6, 0x78}, + dt2: fp.Elt{0x6b, 0x85, 0xb8, 0x37, 0xf7, 0x2d, 0x33, 0x70, 0x8a, 0x17, 0x1a, 0x04, 0x43, 0x5d, 0xd0, 0x75, 0x22, 0x9e, 0xe5, 0xa0, 0x4a, 0xf7, 0x0f, 0x32, 0x42, 0x82, 0x08, 0x50, 0xf3, 0x68, 0xf2, 0x70}, + }, + { /* 41P */ + addYX: fp.Elt{0x47, 0x5f, 0x80, 0xb1, 0x83, 0x45, 0x86, 0x66, 0x19, 0x7c, 0xdd, 0x60, 0xd1, 0xc5, 0x35, 0xf5, 0x06, 0xb0, 0x4c, 0x1e, 0xb7, 0x4e, 0x87, 0xe9, 0xd9, 0x89, 0xd8, 0xfa, 0x5c, 0x34, 0x0d, 0x7c}, + subYX: fp.Elt{0x55, 0xf3, 0xdc, 0x70, 0x20, 0x11, 0x24, 0x23, 0x17, 0xe1, 0xfc, 0xe7, 0x7e, 0xc9, 0x0c, 0x38, 0x98, 0xb6, 0x52, 0x35, 0xed, 0xde, 0x1d, 0xb3, 0xb9, 0xc4, 0xb8, 0x39, 0xc0, 0x56, 0x4e, 0x40}, + dt2: fp.Elt{0x8a, 0x33, 0x78, 0x8c, 0x4b, 0x1f, 0x1f, 0x59, 0xe1, 0xb5, 0xe0, 0x67, 0xb1, 0x6a, 0x36, 0xa0, 0x44, 0x3d, 0x5f, 0xb4, 0x52, 0x41, 0xbc, 0x5c, 0x77, 0xc7, 0xae, 0x2a, 0x76, 0x54, 0xd7, 0x20}, + }, + { /* 43P */ + addYX: fp.Elt{0x58, 0xb7, 0x3b, 0xc7, 0x6f, 0xc3, 0x8f, 0x5e, 0x9a, 0xbb, 0x3c, 0x36, 0xa5, 0x43, 0xe5, 0xac, 0x22, 0xc9, 0x3b, 0x90, 0x7d, 0x4a, 0x93, 0xa9, 0x62, 0xec, 0xce, 0xf3, 0x46, 0x1e, 0x8f, 0x2b}, + subYX: fp.Elt{0x43, 0xf5, 0xb9, 0x35, 0xb1, 0xfe, 0x74, 0x9d, 0x6c, 0x95, 0x8c, 0xde, 0xf1, 0x7d, 0xb3, 0x84, 0xa9, 0x8b, 0x13, 0x57, 0x07, 0x2b, 0x32, 0xe9, 0xe1, 0x4c, 0x0b, 0x79, 0xa8, 0xad, 0xb8, 0x38}, + dt2: fp.Elt{0x5d, 0xf9, 0x51, 0xdf, 0x9c, 0x4a, 0xc0, 0xb5, 0xac, 0xde, 0x1f, 0xcb, 0xae, 0x52, 0x39, 0x2b, 0xda, 0x66, 0x8b, 0x32, 0x8b, 0x6d, 0x10, 0x1d, 0x53, 0x19, 0xba, 0xce, 0x32, 0xeb, 0x9a, 0x04}, + }, + { /* 45P */ + addYX: fp.Elt{0x31, 0x79, 0xfc, 0x75, 0x0b, 0x7d, 0x50, 0xaa, 0xd3, 0x25, 0x67, 0x7a, 0x4b, 0x92, 0xef, 0x0f, 0x30, 0x39, 0x6b, 0x39, 0x2b, 0x54, 0x82, 0x1d, 0xfc, 0x74, 0xf6, 0x30, 0x75, 0xe1, 0x5e, 0x79}, + subYX: fp.Elt{0x7e, 0xfe, 0xdc, 0x63, 0x3c, 0x7d, 0x76, 0xd7, 0x40, 0x6e, 0x85, 0x97, 0x48, 0x59, 0x9c, 0x20, 0x13, 0x7c, 0x4f, 0xe1, 0x61, 0x68, 0x67, 0xb6, 0xfc, 0x25, 0xd6, 0xc8, 0xe0, 0x65, 0xc6, 0x51}, + dt2: fp.Elt{0x81, 0xbd, 0xec, 0x52, 0x0a, 0x5b, 0x4a, 0x25, 0xe7, 0xaf, 0x34, 0xe0, 0x6e, 0x1f, 0x41, 0x5d, 0x31, 0x4a, 0xee, 0xca, 0x0d, 0x4d, 0xa2, 0xe6, 0x77, 0x44, 0xc5, 0x9d, 0xf4, 0x9b, 0xd1, 0x6c}, + }, + { /* 47P */ + addYX: fp.Elt{0x86, 0xc3, 0xaf, 0x65, 0x21, 0x61, 0xfe, 0x1f, 0x10, 0x1b, 0xd5, 0xb8, 0x88, 0x2a, 0x2a, 0x08, 0xaa, 0x0b, 0x99, 0x20, 0x7e, 0x62, 0xf6, 0x76, 0xe7, 0x43, 0x9e, 0x42, 0xa7, 0xb3, 0x01, 0x5e}, + subYX: fp.Elt{0xa3, 0x9c, 0x17, 0x52, 0x90, 0x61, 0x87, 0x7e, 0x85, 0x9f, 0x2c, 0x0b, 0x06, 0x0a, 0x1d, 0x57, 0x1e, 0x71, 0x99, 0x84, 0xa8, 0xba, 0xa2, 0x80, 0x38, 0xe6, 0xb2, 0x40, 0xdb, 0xf3, 0x20, 0x75}, + dt2: fp.Elt{0xa1, 0x57, 0x93, 0xd3, 0xe3, 0x0b, 0xb5, 0x3d, 0xa5, 0x94, 0x9e, 0x59, 0xdd, 0x6c, 0x7b, 0x96, 0x6e, 0x1e, 0x31, 0xdf, 0x64, 0x9a, 0x30, 0x1a, 0x86, 0xc9, 0xf3, 0xce, 0x9c, 0x2c, 0x09, 0x71}, + }, + { /* 49P */ + addYX: fp.Elt{0xcf, 0x1d, 0x05, 0x74, 0xac, 0xd8, 0x6b, 0x85, 0x1e, 0xaa, 0xb7, 0x55, 0x08, 0xa4, 0xf6, 0x03, 0xeb, 0x3c, 0x74, 0xc9, 0xcb, 0xe7, 0x4a, 0x3a, 0xde, 0xab, 0x37, 0x71, 0xbb, 0xa5, 0x73, 0x41}, + subYX: fp.Elt{0x8c, 0x91, 0x64, 0x03, 0x3f, 0x52, 0xd8, 0x53, 0x1c, 0x6b, 0xab, 0x3f, 0xf4, 0x04, 0xb4, 0xa2, 0xa4, 0xe5, 0x81, 0x66, 0x9e, 0x4a, 0x0b, 0x08, 0xa7, 0x7b, 0x25, 0xd0, 0x03, 0x5b, 0xa1, 0x0e}, + dt2: fp.Elt{0x8a, 0x21, 0xf9, 0xf0, 0x31, 0x6e, 0xc5, 0x17, 0x08, 0x47, 0xfc, 0x1a, 0x2b, 0x6e, 0x69, 0x5a, 0x76, 0xf1, 0xb2, 0xf4, 0x68, 0x16, 0x93, 0xf7, 0x67, 0x3a, 0x4e, 0x4a, 0x61, 0x65, 0xc5, 0x5f}, + }, + { /* 51P */ + addYX: fp.Elt{0x8e, 0x98, 0x90, 0x77, 0xe6, 0xe1, 0x92, 0x48, 0x22, 0xd7, 0x5c, 0x1c, 0x0f, 0x95, 0xd5, 0x01, 0xed, 0x3e, 0x92, 0xe5, 0x9a, 0x81, 0xb0, 0xe3, 0x1b, 0x65, 0x46, 0x9d, 0x40, 0xc7, 0x14, 0x32}, + subYX: fp.Elt{0xe5, 0x7a, 0x6d, 0xc4, 0x0d, 0x57, 0x6e, 0x13, 0x8f, 0xdc, 0xf8, 0x54, 0xcc, 0xaa, 0xd0, 0x0f, 0x86, 0xad, 0x0d, 0x31, 0x03, 0x9f, 0x54, 0x59, 0xa1, 0x4a, 0x45, 0x4c, 0x41, 0x1c, 0x71, 0x62}, + dt2: fp.Elt{0x70, 0x17, 0x65, 0x06, 0x74, 0x82, 0x29, 0x13, 0x36, 0x94, 0x27, 0x8a, 0x66, 0xa0, 0xa4, 0x3b, 0x3c, 0x22, 0x5d, 0x18, 0xec, 0xb8, 0xb6, 0xd9, 0x3c, 0x83, 0xcb, 0x3e, 0x07, 0x94, 0xea, 0x5b}, + }, + { /* 53P */ + addYX: fp.Elt{0xf8, 0xd2, 0x43, 0xf3, 0x63, 0xce, 0x70, 0xb4, 0xf1, 0xe8, 0x43, 0x05, 0x8f, 0xba, 0x67, 0x00, 0x6f, 0x7b, 0x11, 0xa2, 0xa1, 0x51, 0xda, 0x35, 0x2f, 0xbd, 0xf1, 0x44, 0x59, 0x78, 0xd0, 0x4a}, + subYX: fp.Elt{0xe4, 0x9b, 0xc8, 0x12, 0x09, 0xbf, 0x1d, 0x64, 0x9c, 0x57, 0x6e, 0x7d, 0x31, 0x8b, 0xf3, 0xac, 0x65, 0xb0, 0x97, 0xf6, 0x02, 0x9e, 0xfe, 0xab, 0xec, 0x1e, 0xf6, 0x48, 0xc1, 0xd5, 0xac, 0x3a}, + dt2: fp.Elt{0x01, 0x83, 0x31, 0xc3, 0x34, 0x3b, 0x8e, 0x85, 0x26, 0x68, 0x31, 0x07, 0x47, 0xc0, 0x99, 0xdc, 0x8c, 0xa8, 0x9d, 0xd3, 0x2e, 0x5b, 0x08, 0x34, 0x3d, 0x85, 0x02, 0xd9, 0xb1, 0x0c, 0xff, 0x3a}, + }, + { /* 55P */ + addYX: fp.Elt{0x05, 0x35, 0xc5, 0xf4, 0x0b, 0x43, 0x26, 0x92, 0x83, 0x22, 0x1f, 0x26, 0x13, 0x9c, 0xe4, 0x68, 0xc6, 0x27, 0xd3, 0x8f, 0x78, 0x33, 0xef, 0x09, 0x7f, 0x9e, 0xd9, 0x2b, 0x73, 0x9f, 0xcf, 0x2c}, + subYX: fp.Elt{0x5e, 0x40, 0x20, 0x3a, 0xeb, 0xc7, 0xc5, 0x87, 0xc9, 0x56, 0xad, 0xed, 0xef, 0x11, 0xe3, 0x8e, 0xf9, 0xd5, 0x29, 0xad, 0x48, 0x2e, 0x25, 0x29, 0x1d, 0x25, 0xcd, 0xf4, 0x86, 0x7e, 0x0e, 0x11}, + dt2: fp.Elt{0xe4, 0xf5, 0x03, 0xd6, 0x9e, 0xd8, 0xc0, 0x57, 0x0c, 0x20, 0xb0, 0xf0, 0x28, 0x86, 0x88, 0x12, 0xb7, 0x3b, 0x2e, 0xa0, 0x09, 0x27, 0x17, 0x53, 0x37, 0x3a, 0x69, 0xb9, 0xe0, 0x57, 0xc5, 0x05}, + }, + { /* 57P */ + addYX: fp.Elt{0xb0, 0x0e, 0xc2, 0x89, 0xb0, 0xbb, 0x76, 0xf7, 0x5c, 0xd8, 0x0f, 0xfa, 0xf6, 0x5b, 0xf8, 0x61, 0xfb, 0x21, 0x44, 0x63, 0x4e, 0x3f, 0xb9, 0xb6, 0x05, 0x12, 0x86, 0x41, 0x08, 0xef, 0x9f, 0x28}, + subYX: fp.Elt{0x6f, 0x7e, 0xc9, 0x1f, 0x31, 0xce, 0xf9, 0xd8, 0xae, 0xfd, 0xf9, 0x11, 0x30, 0x26, 0x3f, 0x7a, 0xdd, 0x25, 0xed, 0x8b, 0xa0, 0x7e, 0x5b, 0xe1, 0x5a, 0x87, 0xe9, 0x8f, 0x17, 0x4c, 0x15, 0x6e}, + dt2: fp.Elt{0xbf, 0x9a, 0xd6, 0xfe, 0x36, 0x63, 0x61, 0xcf, 0x4f, 0xc9, 0x35, 0x83, 0xe7, 0xe4, 0x16, 0x9b, 0xe7, 0x7f, 0x3a, 0x75, 0x65, 0x97, 0x78, 0x13, 0x19, 0xa3, 0x5c, 0xa9, 0x42, 0xf6, 0xfb, 0x6a}, + }, + { /* 59P */ + addYX: fp.Elt{0xcc, 0xa8, 0x13, 0xf9, 0x70, 0x50, 0xe5, 0x5d, 0x61, 0xf5, 0x0c, 0x2b, 0x7b, 0x16, 0x1d, 0x7d, 0x89, 0xd4, 0xea, 0x90, 0xb6, 0x56, 0x29, 0xda, 0xd9, 0x1e, 0x80, 0xdb, 0xce, 0x93, 0xc0, 0x12}, + subYX: fp.Elt{0xc1, 0xd2, 0xf5, 0x62, 0x0c, 0xde, 0xa8, 0x7d, 0x9a, 0x7b, 0x0e, 0xb0, 0xa4, 0x3d, 0xfc, 0x98, 0xe0, 0x70, 0xad, 0x0d, 0xda, 0x6a, 0xeb, 0x7d, 0xc4, 0x38, 0x50, 0xb9, 0x51, 0xb8, 0xb4, 0x0d}, + dt2: fp.Elt{0x0f, 0x19, 0xb8, 0x08, 0x93, 0x7f, 0x14, 0xfc, 0x10, 0xe3, 0x1a, 0xa1, 0xa0, 0x9d, 0x96, 0x06, 0xfd, 0xd7, 0xc7, 0xda, 0x72, 0x55, 0xe7, 0xce, 0xe6, 0x5c, 0x63, 0xc6, 0x99, 0x87, 0xaa, 0x33}, + }, + { /* 61P */ + addYX: fp.Elt{0xb1, 0x6c, 0x15, 0xfc, 0x88, 0xf5, 0x48, 0x83, 0x27, 0x6d, 0x0a, 0x1a, 0x9b, 0xba, 0xa2, 0x6d, 0xb6, 0x5a, 0xca, 0x87, 0x5c, 0x2d, 0x26, 0xe2, 0xa6, 0x89, 0xd5, 0xc8, 0xc1, 0xd0, 0x2c, 0x21}, + subYX: fp.Elt{0xf2, 0x5c, 0x08, 0xbd, 0x1e, 0xf5, 0x0f, 0xaf, 0x1f, 0x3f, 0xd3, 0x67, 0x89, 0x1a, 0xf5, 0x78, 0x3c, 0x03, 0x60, 0x50, 0xe1, 0xbf, 0xc2, 0x6e, 0x86, 0x1a, 0xe2, 0xe8, 0x29, 0x6f, 0x3c, 0x23}, + dt2: fp.Elt{0x81, 0xc7, 0x18, 0x7f, 0x10, 0xd5, 0xf4, 0xd2, 0x28, 0x9d, 0x7e, 0x52, 0xf2, 0xcd, 0x2e, 0x12, 0x41, 0x33, 0x3d, 0x3d, 0x2a, 0x86, 0x0a, 0xa7, 0xe3, 0x4c, 0x91, 0x11, 0x89, 0x77, 0xb7, 0x1d}, + }, + { /* 63P */ + addYX: fp.Elt{0xb6, 0x1a, 0x70, 0xdd, 0x69, 0x47, 0x39, 0xb3, 0xa5, 0x8d, 0xcf, 0x19, 0xd4, 0xde, 0xb8, 0xe2, 0x52, 0xc8, 0x2a, 0xfd, 0x61, 0x41, 0xdf, 0x15, 0xbe, 0x24, 0x7d, 0x01, 0x8a, 0xca, 0xe2, 0x7a}, + subYX: fp.Elt{0x6f, 0xc2, 0x6b, 0x7c, 0x39, 0x52, 0xf3, 0xdd, 0x13, 0x01, 0xd5, 0x53, 0xcc, 0xe2, 0x97, 0x7a, 0x30, 0xa3, 0x79, 0xbf, 0x3a, 0xf4, 0x74, 0x7c, 0xfc, 0xad, 0xe2, 0x26, 0xad, 0x97, 0xad, 0x31}, + dt2: fp.Elt{0x62, 0xb9, 0x20, 0x09, 0xed, 0x17, 0xe8, 0xb7, 0x9d, 0xda, 0x19, 0x3f, 0xcc, 0x18, 0x85, 0x1e, 0x64, 0x0a, 0x56, 0x25, 0x4f, 0xc1, 0x91, 0xe4, 0x83, 0x2c, 0x62, 0xa6, 0x53, 0xfc, 0xd1, 0x1e}, + }, +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/ed448/ed448.go b/backend/vendor/github.com/cloudflare/circl/sign/ed448/ed448.go new file mode 100644 index 0000000..c368b18 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/ed448/ed448.go @@ -0,0 +1,411 @@ +// Package ed448 implements Ed448 signature scheme as described in RFC-8032. +// +// This package implements two signature variants. +// +// | Scheme Name | Sign Function | Verification | Context | +// |-------------|-------------------|---------------|-------------------| +// | Ed448 | Sign | Verify | Yes, can be empty | +// | Ed448Ph | SignPh | VerifyPh | Yes, can be empty | +// | All above | (PrivateKey).Sign | VerifyAny | As above | +// +// Specific functions for sign and verify are defined. A generic signing +// function for all schemes is available through the crypto.Signer interface, +// which is implemented by the PrivateKey type. A correspond all-in-one +// verification method is provided by the VerifyAny function. +// +// Both schemes require a context string for domain separation. This parameter +// is passed using a SignerOptions struct defined in this package. +// +// References: +// +// - RFC8032: https://rfc-editor.org/rfc/rfc8032.txt +// - EdDSA for more curves: https://eprint.iacr.org/2015/677 +// - High-speed high-security signatures: https://doi.org/10.1007/s13389-012-0027-1 +package ed448 + +import ( + "bytes" + "crypto" + cryptoRand "crypto/rand" + "crypto/subtle" + "errors" + "fmt" + "io" + "strconv" + + "github.com/cloudflare/circl/ecc/goldilocks" + "github.com/cloudflare/circl/internal/sha3" + "github.com/cloudflare/circl/sign" +) + +const ( + // ContextMaxSize is the maximum length (in bytes) allowed for context. + ContextMaxSize = 255 + // PublicKeySize is the length in bytes of Ed448 public keys. + PublicKeySize = 57 + // PrivateKeySize is the length in bytes of Ed448 private keys. + PrivateKeySize = 114 + // SignatureSize is the length in bytes of signatures. + SignatureSize = 114 + // SeedSize is the size, in bytes, of private key seeds. These are the private key representations used by RFC 8032. + SeedSize = 57 +) + +const ( + paramB = 456 / 8 // Size of keys in bytes. + hashSize = 2 * paramB // Size of the hash function's output. +) + +// SignerOptions implements crypto.SignerOpts and augments with parameters +// that are specific to the Ed448 signature schemes. +type SignerOptions struct { + // Hash must be crypto.Hash(0) for both Ed448 and Ed448Ph. + crypto.Hash + + // Context is an optional domain separation string for signing. + // Its length must be less or equal than 255 bytes. + Context string + + // Scheme is an identifier for choosing a signature scheme. + Scheme SchemeID +} + +// SchemeID is an identifier for each signature scheme. +type SchemeID uint + +const ( + ED448 SchemeID = iota + ED448Ph +) + +// PublicKey is the type of Ed448 public keys. +type PublicKey []byte + +// Equal reports whether pub and x have the same value. +func (pub PublicKey) Equal(x crypto.PublicKey) bool { + xx, ok := x.(PublicKey) + return ok && bytes.Equal(pub, xx) +} + +// PrivateKey is the type of Ed448 private keys. It implements crypto.Signer. +type PrivateKey []byte + +// Equal reports whether priv and x have the same value. +func (priv PrivateKey) Equal(x crypto.PrivateKey) bool { + xx, ok := x.(PrivateKey) + return ok && subtle.ConstantTimeCompare(priv, xx) == 1 +} + +// Public returns the PublicKey corresponding to priv. +func (priv PrivateKey) Public() crypto.PublicKey { + publicKey := make([]byte, PublicKeySize) + copy(publicKey, priv[SeedSize:]) + return PublicKey(publicKey) +} + +// Seed returns the private key seed corresponding to priv. It is provided for +// interoperability with RFC 8032. RFC 8032's private keys correspond to seeds +// in this package. +func (priv PrivateKey) Seed() []byte { + seed := make([]byte, SeedSize) + copy(seed, priv[:SeedSize]) + return seed +} + +func (priv PrivateKey) Scheme() sign.Scheme { return sch } + +func (pub PublicKey) Scheme() sign.Scheme { return sch } + +func (priv PrivateKey) MarshalBinary() (data []byte, err error) { + privateKey := make(PrivateKey, PrivateKeySize) + copy(privateKey, priv) + return privateKey, nil +} + +func (pub PublicKey) MarshalBinary() (data []byte, err error) { + publicKey := make(PublicKey, PublicKeySize) + copy(publicKey, pub) + return publicKey, nil +} + +// Sign creates a signature of a message given a key pair. +// This function supports all the two signature variants defined in RFC-8032, +// namely Ed448 (or pure EdDSA) and Ed448Ph. +// The opts.HashFunc() must return zero to the specify Ed448 variant. This can +// be achieved by passing crypto.Hash(0) as the value for opts. +// Use an Options struct to pass a bool indicating that the ed448Ph variant +// should be used. +// The struct can also be optionally used to pass a context string for signing. +func (priv PrivateKey) Sign( + rand io.Reader, + message []byte, + opts crypto.SignerOpts, +) (signature []byte, err error) { + var ctx string + var scheme SchemeID + + if o, ok := opts.(SignerOptions); ok { + ctx = o.Context + scheme = o.Scheme + } + + switch true { + case scheme == ED448 && opts.HashFunc() == crypto.Hash(0): + return Sign(priv, message, ctx), nil + case scheme == ED448Ph && opts.HashFunc() == crypto.Hash(0): + return SignPh(priv, message, ctx), nil + default: + return nil, errors.New("ed448: bad hash algorithm") + } +} + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (PublicKey, PrivateKey, error) { + if rand == nil { + rand = cryptoRand.Reader + } + + seed := make(PrivateKey, SeedSize) + if _, err := io.ReadFull(rand, seed); err != nil { + return nil, nil, err + } + + privateKey := NewKeyFromSeed(seed) + publicKey := make([]byte, PublicKeySize) + copy(publicKey, privateKey[SeedSize:]) + + return publicKey, privateKey, nil +} + +// NewKeyFromSeed calculates a private key from a seed. It will panic if +// len(seed) is not SeedSize. This function is provided for interoperability +// with RFC 8032. RFC 8032's private keys correspond to seeds in this +// package. +func NewKeyFromSeed(seed []byte) PrivateKey { + privateKey := make([]byte, PrivateKeySize) + newKeyFromSeed(privateKey, seed) + return privateKey +} + +func newKeyFromSeed(privateKey, seed []byte) { + if l := len(seed); l != SeedSize { + panic("ed448: bad seed length: " + strconv.Itoa(l)) + } + + var h [hashSize]byte + H := sha3.NewShake256() + _, _ = H.Write(seed) + _, _ = H.Read(h[:]) + s := &goldilocks.Scalar{} + deriveSecretScalar(s, h[:paramB]) + + copy(privateKey[:SeedSize], seed) + _ = goldilocks.Curve{}.ScalarBaseMult(s).ToBytes(privateKey[SeedSize:]) +} + +func signAll(signature []byte, privateKey PrivateKey, message, ctx []byte, preHash bool) { + if len(ctx) > ContextMaxSize { + panic(fmt.Errorf("ed448: bad context length: %v", len(ctx))) + } + + H := sha3.NewShake256() + var PHM []byte + + if preHash { + var h [64]byte + _, _ = H.Write(message) + _, _ = H.Read(h[:]) + PHM = h[:] + H.Reset() + } else { + PHM = message + } + + // 1. Hash the 57-byte private key using SHAKE256(x, 114). + var h [hashSize]byte + _, _ = H.Write(privateKey[:SeedSize]) + _, _ = H.Read(h[:]) + s := &goldilocks.Scalar{} + deriveSecretScalar(s, h[:paramB]) + prefix := h[paramB:] + + // 2. Compute SHAKE256(dom4(F, C) || prefix || PH(M), 114). + var rPM [hashSize]byte + H.Reset() + + writeDom(&H, ctx, preHash) + + _, _ = H.Write(prefix) + _, _ = H.Write(PHM) + _, _ = H.Read(rPM[:]) + + // 3. Compute the point [r]B. + r := &goldilocks.Scalar{} + r.FromBytes(rPM[:]) + R := (&[paramB]byte{})[:] + if err := (goldilocks.Curve{}.ScalarBaseMult(r).ToBytes(R)); err != nil { + panic(err) + } + // 4. Compute SHAKE256(dom4(F, C) || R || A || PH(M), 114) + var hRAM [hashSize]byte + H.Reset() + + writeDom(&H, ctx, preHash) + + _, _ = H.Write(R) + _, _ = H.Write(privateKey[SeedSize:]) + _, _ = H.Write(PHM) + _, _ = H.Read(hRAM[:]) + + // 5. Compute S = (r + k * s) mod order. + k := &goldilocks.Scalar{} + k.FromBytes(hRAM[:]) + S := &goldilocks.Scalar{} + S.Mul(k, s) + S.Add(S, r) + + // 6. The signature is the concatenation of R and S. + copy(signature[:paramB], R[:]) + copy(signature[paramB:], S[:]) +} + +// Sign signs the message with privateKey and returns a signature. +// This function supports the signature variant defined in RFC-8032: Ed448, +// also known as the pure version of EdDSA. +// It will panic if len(privateKey) is not PrivateKeySize. +func Sign(priv PrivateKey, message []byte, ctx string) []byte { + signature := make([]byte, SignatureSize) + signAll(signature, priv, message, []byte(ctx), false) + return signature +} + +// SignPh creates a signature of a message given a keypair. +// This function supports the signature variant defined in RFC-8032: Ed448ph, +// meaning it internally hashes the message using SHAKE-256. +// Context could be passed to this function, which length should be no more than +// 255. It can be empty. +func SignPh(priv PrivateKey, message []byte, ctx string) []byte { + signature := make([]byte, SignatureSize) + signAll(signature, priv, message, []byte(ctx), true) + return signature +} + +func verify(public PublicKey, message, signature, ctx []byte, preHash bool) bool { + if len(public) != PublicKeySize || + len(signature) != SignatureSize || + len(ctx) > ContextMaxSize || + !isLessThanOrder(signature[paramB:]) { + return false + } + + P, err := goldilocks.FromBytes(public) + if err != nil { + return false + } + + H := sha3.NewShake256() + var PHM []byte + + if preHash { + var h [64]byte + _, _ = H.Write(message) + _, _ = H.Read(h[:]) + PHM = h[:] + H.Reset() + } else { + PHM = message + } + + var hRAM [hashSize]byte + R := signature[:paramB] + + writeDom(&H, ctx, preHash) + + _, _ = H.Write(R) + _, _ = H.Write(public) + _, _ = H.Write(PHM) + _, _ = H.Read(hRAM[:]) + + k := &goldilocks.Scalar{} + k.FromBytes(hRAM[:]) + S := &goldilocks.Scalar{} + S.FromBytes(signature[paramB:]) + + encR := (&[paramB]byte{})[:] + P.Neg() + _ = goldilocks.Curve{}.CombinedMult(S, k, P).ToBytes(encR) + return bytes.Equal(R, encR) +} + +// VerifyAny returns true if the signature is valid. Failure cases are invalid +// signature, or when the public key cannot be decoded. +// This function supports all the two signature variants defined in RFC-8032, +// namely Ed448 (or pure EdDSA) and Ed448Ph. +// The opts.HashFunc() must return zero, this can be achieved by passing +// crypto.Hash(0) as the value for opts. +// Use a SignerOptions struct to pass a context string for signing. +func VerifyAny(public PublicKey, message, signature []byte, opts crypto.SignerOpts) bool { + var ctx string + var scheme SchemeID + if o, ok := opts.(SignerOptions); ok { + ctx = o.Context + scheme = o.Scheme + } + + switch true { + case scheme == ED448 && opts.HashFunc() == crypto.Hash(0): + return Verify(public, message, signature, ctx) + case scheme == ED448Ph && opts.HashFunc() == crypto.Hash(0): + return VerifyPh(public, message, signature, ctx) + default: + return false + } +} + +// Verify returns true if the signature is valid. Failure cases are invalid +// signature, or when the public key cannot be decoded. +// This function supports the signature variant defined in RFC-8032: Ed448, +// also known as the pure version of EdDSA. +func Verify(public PublicKey, message, signature []byte, ctx string) bool { + return verify(public, message, signature, []byte(ctx), false) +} + +// VerifyPh returns true if the signature is valid. Failure cases are invalid +// signature, or when the public key cannot be decoded. +// This function supports the signature variant defined in RFC-8032: Ed448ph, +// meaning it internally hashes the message using SHAKE-256. +// Context could be passed to this function, which length should be no more than +// 255. It can be empty. +func VerifyPh(public PublicKey, message, signature []byte, ctx string) bool { + return verify(public, message, signature, []byte(ctx), true) +} + +func deriveSecretScalar(s *goldilocks.Scalar, h []byte) { + h[0] &= 0xFC // The two least significant bits of the first octet are cleared, + h[paramB-1] = 0x00 // all eight bits the last octet are cleared, and + h[paramB-2] |= 0x80 // the highest bit of the second to last octet is set. + s.FromBytes(h[:paramB]) +} + +// isLessThanOrder returns true if 0 <= x < order and if the last byte of x is zero. +func isLessThanOrder(x []byte) bool { + order := goldilocks.Curve{}.Order() + i := len(order) - 1 + for i > 0 && x[i] == order[i] { + i-- + } + return x[paramB-1] == 0 && x[i] < order[i] +} + +func writeDom(h io.Writer, ctx []byte, preHash bool) { + dom4 := "SigEd448" + _, _ = h.Write([]byte(dom4)) + + if preHash { + _, _ = h.Write([]byte{byte(0x01), byte(len(ctx))}) + } else { + _, _ = h.Write([]byte{byte(0x00), byte(len(ctx))}) + } + _, _ = h.Write(ctx) +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/ed448/signapi.go b/backend/vendor/github.com/cloudflare/circl/sign/ed448/signapi.go new file mode 100644 index 0000000..22da8bc --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/ed448/signapi.go @@ -0,0 +1,87 @@ +package ed448 + +import ( + "crypto/rand" + "encoding/asn1" + + "github.com/cloudflare/circl/sign" +) + +var sch sign.Scheme = &scheme{} + +// Scheme returns a signature interface. +func Scheme() sign.Scheme { return sch } + +type scheme struct{} + +func (*scheme) Name() string { return "Ed448" } +func (*scheme) PublicKeySize() int { return PublicKeySize } +func (*scheme) PrivateKeySize() int { return PrivateKeySize } +func (*scheme) SignatureSize() int { return SignatureSize } +func (*scheme) SeedSize() int { return SeedSize } +func (*scheme) TLSIdentifier() uint { return 0x0808 } +func (*scheme) SupportsContext() bool { return true } +func (*scheme) Oid() asn1.ObjectIdentifier { + return asn1.ObjectIdentifier{1, 3, 101, 113} +} + +func (*scheme) GenerateKey() (sign.PublicKey, sign.PrivateKey, error) { + return GenerateKey(rand.Reader) +} + +func (*scheme) Sign( + sk sign.PrivateKey, + message []byte, + opts *sign.SignatureOpts, +) []byte { + priv, ok := sk.(PrivateKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + ctx := "" + if opts != nil { + ctx = opts.Context + } + return Sign(priv, message, ctx) +} + +func (*scheme) Verify( + pk sign.PublicKey, + message, signature []byte, + opts *sign.SignatureOpts, +) bool { + pub, ok := pk.(PublicKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + ctx := "" + if opts != nil { + ctx = opts.Context + } + return Verify(pub, message, signature, ctx) +} + +func (*scheme) DeriveKey(seed []byte) (sign.PublicKey, sign.PrivateKey) { + privateKey := NewKeyFromSeed(seed) + publicKey := make(PublicKey, PublicKeySize) + copy(publicKey, privateKey[SeedSize:]) + return publicKey, privateKey +} + +func (*scheme) UnmarshalBinaryPublicKey(buf []byte) (sign.PublicKey, error) { + if len(buf) < PublicKeySize { + return nil, sign.ErrPubKeySize + } + pub := make(PublicKey, PublicKeySize) + copy(pub, buf[:PublicKeySize]) + return pub, nil +} + +func (*scheme) UnmarshalBinaryPrivateKey(buf []byte) (sign.PrivateKey, error) { + if len(buf) < PrivateKeySize { + return nil, sign.ErrPrivKeySize + } + priv := make(PrivateKey, PrivateKeySize) + copy(priv, buf[:PrivateKeySize]) + return priv, nil +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/eddilithium2/eddilithium.go b/backend/vendor/github.com/cloudflare/circl/sign/eddilithium2/eddilithium.go new file mode 100644 index 0000000..9ab4401 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/eddilithium2/eddilithium.go @@ -0,0 +1,239 @@ +// Package eddilithium2 implements the hybrid signature scheme Ed25519-Dilithium2. +package eddilithium2 + +import ( + "crypto" + cryptoRand "crypto/rand" + "errors" + "io" + + "github.com/cloudflare/circl/internal/sha3" + "github.com/cloudflare/circl/sign" + "github.com/cloudflare/circl/sign/dilithium/mode2" + "github.com/cloudflare/circl/sign/ed25519" +) + +const ( + // SeedSize is the length of the seed for NewKeyFromSeed + SeedSize = mode2.SeedSize // = ed25519.SeedSize = 32 + + // PublicKeySize is the length in bytes of the packed public key. + PublicKeySize = mode2.PublicKeySize + ed25519.PublicKeySize + + // PrivateKeySize is the length in bytes of the packed public key. + PrivateKeySize = mode2.PrivateKeySize + ed25519.SeedSize + + // SignatureSize is the length in bytes of the signatures. + SignatureSize = mode2.SignatureSize + ed25519.SignatureSize +) + +// PublicKey is the type of an EdDilithium2 public key. +type PublicKey struct { + e ed25519.PublicKey + d mode2.PublicKey +} + +// PrivateKey is the type of an EdDilithium2 private key. +type PrivateKey struct { + e ed25519.PrivateKey + d mode2.PrivateKey +} + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error) { + var seed [SeedSize]byte + if rand == nil { + rand = cryptoRand.Reader + } + _, err := io.ReadFull(rand, seed[:]) + if err != nil { + return nil, nil, err + } + + pk, sk := NewKeyFromSeed(&seed) + return pk, sk, nil +} + +// NewKeyFromSeed derives a public/private key pair using the given seed. +func NewKeyFromSeed(seed *[SeedSize]byte) (*PublicKey, *PrivateKey) { + var seed1 [32]byte + var seed2 [ed25519.SeedSize]byte + + // Internally, Ed25519 and Dilithium hash the seeds they are passed again + // with different hash functions, so it would be safe to use exactly the + // same seed for Ed25519 and Dilithium here. However, in general, when + // combining any two signature schemes it might not be the case that this + // is safe. Setting a bad example here isn't worth the tiny gain in + // performance. + + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + _, _ = h.Read(seed1[:]) + _, _ = h.Read(seed2[:]) + dpk, dsk := mode2.NewKeyFromSeed(&seed1) + esk := ed25519.NewKeyFromSeed(seed2[:]) + + return &PublicKey{esk.Public().(ed25519.PublicKey), *dpk}, &PrivateKey{esk, *dsk} +} + +// SignTo signs the given message and writes the signature into signature. +// It will panic if signature is not of length at least SignatureSize. +func SignTo(sk *PrivateKey, msg []byte, signature []byte) { + mode2.SignTo( + &sk.d, + msg, + signature[:mode2.SignatureSize], + ) + esig := ed25519.Sign( + sk.e, + msg, + ) + copy(signature[mode2.SignatureSize:], esig[:]) +} + +// Verify checks whether the given signature by pk on msg is valid. +func Verify(pk *PublicKey, msg []byte, signature []byte) bool { + if !mode2.Verify( + &pk.d, + msg, + signature[:mode2.SignatureSize], + ) { + return false + } + if !ed25519.Verify( + pk.e, + msg, + signature[mode2.SignatureSize:], + ) { + return false + } + return true +} + +// Unpack unpacks pk to the public key encoded in buf. +func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte) { + var tmp [mode2.PublicKeySize]byte + copy(tmp[:], buf[:mode2.PublicKeySize]) + pk.d.Unpack(&tmp) + pk.e = make([]byte, ed25519.PublicKeySize) + copy(pk.e, buf[mode2.PublicKeySize:]) +} + +// Unpack sets sk to the private key encoded in buf. +func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte) { + var tmp [mode2.PrivateKeySize]byte + copy(tmp[:], buf[:mode2.PrivateKeySize]) + sk.d.Unpack(&tmp) + sk.e = ed25519.NewKeyFromSeed(buf[mode2.PrivateKeySize:]) +} + +// Pack packs the public key into buf. +func (pk *PublicKey) Pack(buf *[PublicKeySize]byte) { + var tmp [mode2.PublicKeySize]byte + pk.d.Pack(&tmp) + copy(buf[:mode2.PublicKeySize], tmp[:]) + copy(buf[mode2.PublicKeySize:], pk.e) +} + +// Pack packs the private key into buf. +func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte) { + var tmp [mode2.PrivateKeySize]byte + sk.d.Pack(&tmp) + copy(buf[:mode2.PrivateKeySize], tmp[:]) + copy(buf[mode2.PrivateKeySize:], sk.e.Seed()) +} + +// Bytes packs the public key. +func (pk *PublicKey) Bytes() []byte { + return append(pk.d.Bytes(), pk.e...) +} + +// Bytes packs the private key. +func (sk *PrivateKey) Bytes() []byte { + return append(sk.d.Bytes(), sk.e.Seed()...) +} + +// MarshalBinary packs the public key. +func (pk *PublicKey) MarshalBinary() ([]byte, error) { + return pk.Bytes(), nil +} + +// MarshalBinary packs the private key. +func (sk *PrivateKey) MarshalBinary() ([]byte, error) { + return sk.Bytes(), nil +} + +// UnmarshalBinary the public key from data. +func (pk *PublicKey) UnmarshalBinary(data []byte) error { + if len(data) != PublicKeySize { + return errors.New("packed public key must be of eddilithium2.PublicKeySize bytes") + } + var buf [PublicKeySize]byte + copy(buf[:], data) + pk.Unpack(&buf) + return nil +} + +// UnmarshalBinary unpacks the private key from data. +func (sk *PrivateKey) UnmarshalBinary(data []byte) error { + if len(data) != PrivateKeySize { + return errors.New("packed private key must be of eddilithium2.PrivateKeySize bytes") + } + var buf [PrivateKeySize]byte + copy(buf[:], data) + sk.Unpack(&buf) + return nil +} + +func (sk *PrivateKey) Scheme() sign.Scheme { return sch } +func (pk *PublicKey) Scheme() sign.Scheme { return sch } + +func (sk *PrivateKey) Equal(other crypto.PrivateKey) bool { + castOther, ok := other.(*PrivateKey) + if !ok { + return false + } + return castOther.e.Equal(sk.e) && castOther.d.Equal(&sk.d) +} + +func (pk *PublicKey) Equal(other crypto.PublicKey) bool { + castOther, ok := other.(*PublicKey) + if !ok { + return false + } + return castOther.e.Equal(pk.e) && castOther.d.Equal(&pk.d) +} + +// Sign signs the given message. +// +// opts.HashFunc() must return zero, which can be achieved by passing +// crypto.Hash(0) for opts. rand is ignored. Will only return an error +// if opts.HashFunc() is non-zero. +// +// This function is used to make PrivateKey implement the crypto.Signer +// interface. The package-level SignTo function might be more convenient +// to use. +func (sk *PrivateKey) Sign( + rand io.Reader, msg []byte, opts crypto.SignerOpts, +) (signature []byte, err error) { + var sig [SignatureSize]byte + + if opts.HashFunc() != crypto.Hash(0) { + return nil, errors.New("eddilithium2: cannot sign hashed message") + } + + SignTo(sk, msg, sig[:]) + return sig[:], nil +} + +// Public computes the public key corresponding to this private key. +// +// Returns a *PublicKey. The type crypto.PublicKey is used to make +// PrivateKey implement the crypto.Signer interface. +func (sk *PrivateKey) Public() crypto.PublicKey { + return &PublicKey{ + sk.e.Public().(ed25519.PublicKey), + *sk.d.Public().(*mode2.PublicKey), + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/eddilithium2/signapi.go b/backend/vendor/github.com/cloudflare/circl/sign/eddilithium2/signapi.go new file mode 100644 index 0000000..0339243 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/eddilithium2/signapi.go @@ -0,0 +1,93 @@ +package eddilithium2 + +import ( + "crypto/rand" + "encoding/asn1" + + "github.com/cloudflare/circl/sign" +) + +var sch sign.Scheme = &scheme{} + +// Scheme returns a signature interface. +func Scheme() sign.Scheme { return sch } + +type scheme struct{} + +func (*scheme) Name() string { return "Ed25519-Dilithium2" } +func (*scheme) PublicKeySize() int { return PublicKeySize } +func (*scheme) PrivateKeySize() int { return PrivateKeySize } +func (*scheme) SignatureSize() int { return SignatureSize } +func (*scheme) SeedSize() int { return SeedSize } +func (*scheme) TLSIdentifier() uint { return 0xfe61 /* temp*/ } +func (*scheme) SupportsContext() bool { return false } +func (*scheme) Oid() asn1.ObjectIdentifier { + return asn1.ObjectIdentifier{1, 3, 6, 1, 4, 1, 44363, 45, 9} +} + +func (*scheme) GenerateKey() (sign.PublicKey, sign.PrivateKey, error) { + return GenerateKey(rand.Reader) +} + +func (*scheme) Sign( + sk sign.PrivateKey, + message []byte, + opts *sign.SignatureOpts, +) []byte { + priv, ok := sk.(*PrivateKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + panic(sign.ErrContextNotSupported) + } + var sig [SignatureSize]byte + SignTo(priv, message, sig[:]) + return sig[:] +} + +func (*scheme) Verify( + pk sign.PublicKey, + message, signature []byte, + opts *sign.SignatureOpts, +) bool { + pub, ok := pk.(*PublicKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + panic(sign.ErrContextNotSupported) + } + return Verify(pub, message, signature) +} + +func (*scheme) DeriveKey(seed []byte) (sign.PublicKey, sign.PrivateKey) { + if len(seed) != SeedSize { + panic(sign.ErrSeedSize) + } + var tmp [SeedSize]byte + copy(tmp[:], seed) + return NewKeyFromSeed(&tmp) +} + +func (*scheme) UnmarshalBinaryPublicKey(buf []byte) (sign.PublicKey, error) { + if len(buf) != PublicKeySize { + return nil, sign.ErrPubKeySize + } + var tmp [PublicKeySize]byte + copy(tmp[:], buf) + var ret PublicKey + ret.Unpack(&tmp) + return &ret, nil +} + +func (*scheme) UnmarshalBinaryPrivateKey(buf []byte) (sign.PrivateKey, error) { + if len(buf) != PrivateKeySize { + return nil, sign.ErrPrivKeySize + } + var tmp [PrivateKeySize]byte + copy(tmp[:], buf) + var ret PrivateKey + ret.Unpack(&tmp) + return &ret, nil +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/eddilithium3/eddilithium.go b/backend/vendor/github.com/cloudflare/circl/sign/eddilithium3/eddilithium.go new file mode 100644 index 0000000..aa05c68 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/eddilithium3/eddilithium.go @@ -0,0 +1,234 @@ +// Package eddilithium3 implements the hybrid signature scheme Ed448-Dilithium3. +package eddilithium3 + +import ( + "crypto" + cryptoRand "crypto/rand" + "errors" + "io" + + "github.com/cloudflare/circl/internal/sha3" + "github.com/cloudflare/circl/sign" + "github.com/cloudflare/circl/sign/dilithium/mode3" + "github.com/cloudflare/circl/sign/ed448" +) + +const ( + // SeedSize is the length of the seed for NewKeyFromSeed + SeedSize = ed448.SeedSize // > mode3.SeedSize + + // PublicKeySize is the length in bytes of the packed public key. + PublicKeySize = mode3.PublicKeySize + ed448.PublicKeySize + + // PrivateKeySize is the length in bytes of the packed public key. + PrivateKeySize = mode3.PrivateKeySize + ed448.SeedSize + + // SignatureSize is the length in bytes of the signatures. + SignatureSize = mode3.SignatureSize + ed448.SignatureSize +) + +// PublicKey is the type of an EdDilithium3 public key. +type PublicKey struct { + e ed448.PublicKey + d mode3.PublicKey +} + +// PrivateKey is the type of an EdDilithium3 private key. +type PrivateKey struct { + e ed448.PrivateKey + d mode3.PrivateKey +} + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error) { + var seed [SeedSize]byte + if rand == nil { + rand = cryptoRand.Reader + } + _, err := io.ReadFull(rand, seed[:]) + if err != nil { + return nil, nil, err + } + + pk, sk := NewKeyFromSeed(&seed) + return pk, sk, nil +} + +// NewKeyFromSeed derives a public/private key pair using the given seed. +func NewKeyFromSeed(seed *[SeedSize]byte) (*PublicKey, *PrivateKey) { + var seed1 [32]byte + var seed2 [ed448.SeedSize]byte + + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + _, _ = h.Read(seed1[:]) + _, _ = h.Read(seed2[:]) + dpk, dsk := mode3.NewKeyFromSeed(&seed1) + esk := ed448.NewKeyFromSeed(seed2[:]) + + return &PublicKey{esk.Public().(ed448.PublicKey), *dpk}, &PrivateKey{esk, *dsk} +} + +// SignTo signs the given message and writes the signature into signature. +// It will panic if signature is not of length at least SignatureSize. +func SignTo(sk *PrivateKey, msg []byte, signature []byte) { + mode3.SignTo( + &sk.d, + msg, + signature[:mode3.SignatureSize], + ) + esig := ed448.Sign( + sk.e, + msg, + "", + ) + copy(signature[mode3.SignatureSize:], esig[:]) +} + +// Verify checks whether the given signature by pk on msg is valid. +func Verify(pk *PublicKey, msg []byte, signature []byte) bool { + if !mode3.Verify( + &pk.d, + msg, + signature[:mode3.SignatureSize], + ) { + return false + } + if !ed448.Verify( + pk.e, + msg, + signature[mode3.SignatureSize:], + "", + ) { + return false + } + return true +} + +// Unpack unpacks pk to the public key encoded in buf. +func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte) { + var tmp [mode3.PublicKeySize]byte + copy(tmp[:], buf[:mode3.PublicKeySize]) + pk.d.Unpack(&tmp) + pk.e = make([]byte, ed448.PublicKeySize) + copy(pk.e, buf[mode3.PublicKeySize:]) +} + +// Unpack sets sk to the private key encoded in buf. +func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte) { + var tmp [mode3.PrivateKeySize]byte + copy(tmp[:], buf[:mode3.PrivateKeySize]) + sk.d.Unpack(&tmp) + sk.e = ed448.NewKeyFromSeed(buf[mode3.PrivateKeySize:]) +} + +// Pack packs the public key into buf. +func (pk *PublicKey) Pack(buf *[PublicKeySize]byte) { + var tmp [mode3.PublicKeySize]byte + pk.d.Pack(&tmp) + copy(buf[:mode3.PublicKeySize], tmp[:]) + copy(buf[mode3.PublicKeySize:], pk.e) +} + +// Pack packs the private key into buf. +func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte) { + var tmp [mode3.PrivateKeySize]byte + sk.d.Pack(&tmp) + copy(buf[:mode3.PrivateKeySize], tmp[:]) + copy(buf[mode3.PrivateKeySize:], sk.e.Seed()) +} + +// Bytes packs the public key. +func (pk *PublicKey) Bytes() []byte { + return append(pk.d.Bytes(), pk.e...) +} + +// Bytes packs the private key. +func (sk *PrivateKey) Bytes() []byte { + return append(sk.d.Bytes(), sk.e.Seed()...) +} + +// MarshalBinary packs the public key. +func (pk *PublicKey) MarshalBinary() ([]byte, error) { + return pk.Bytes(), nil +} + +// MarshalBinary packs the private key. +func (sk *PrivateKey) MarshalBinary() ([]byte, error) { + return sk.Bytes(), nil +} + +// UnmarshalBinary the public key from data. +func (pk *PublicKey) UnmarshalBinary(data []byte) error { + if len(data) != PublicKeySize { + return errors.New("packed public key must be of eddilithium3.PublicKeySize bytes") + } + var buf [PublicKeySize]byte + copy(buf[:], data) + pk.Unpack(&buf) + return nil +} + +// UnmarshalBinary unpacks the private key from data. +func (sk *PrivateKey) UnmarshalBinary(data []byte) error { + if len(data) != PrivateKeySize { + return errors.New("packed private key must be of eddilithium3.PrivateKeySize bytes") + } + var buf [PrivateKeySize]byte + copy(buf[:], data) + sk.Unpack(&buf) + return nil +} + +func (sk *PrivateKey) Scheme() sign.Scheme { return sch } +func (pk *PublicKey) Scheme() sign.Scheme { return sch } + +func (sk *PrivateKey) Equal(other crypto.PrivateKey) bool { + castOther, ok := other.(*PrivateKey) + if !ok { + return false + } + return castOther.e.Equal(sk.e) && castOther.d.Equal(&sk.d) +} + +func (pk *PublicKey) Equal(other crypto.PublicKey) bool { + castOther, ok := other.(*PublicKey) + if !ok { + return false + } + return castOther.e.Equal(pk.e) && castOther.d.Equal(&pk.d) +} + +// Sign signs the given message. +// +// opts.HashFunc() must return zero, which can be achieved by passing +// crypto.Hash(0) for opts. rand is ignored. Will only return an error +// if opts.HashFunc() is non-zero. +// +// This function is used to make PrivateKey implement the crypto.Signer +// interface. The package-level SignTo function might be more convenient +// to use. +func (sk *PrivateKey) Sign( + rand io.Reader, msg []byte, opts crypto.SignerOpts, +) (signature []byte, err error) { + var sig [SignatureSize]byte + + if opts.HashFunc() != crypto.Hash(0) { + return nil, errors.New("eddilithium3: cannot sign hashed message") + } + + SignTo(sk, msg, sig[:]) + return sig[:], nil +} + +// Public computes the public key corresponding to this private key. +// +// Returns a *PublicKey. The type crypto.PublicKey is used to make +// PrivateKey implement the crypto.Signer interface. +func (sk *PrivateKey) Public() crypto.PublicKey { + return &PublicKey{ + sk.e.Public().(ed448.PublicKey), + *sk.d.Public().(*mode3.PublicKey), + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/eddilithium3/signapi.go b/backend/vendor/github.com/cloudflare/circl/sign/eddilithium3/signapi.go new file mode 100644 index 0000000..1c345cf --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/eddilithium3/signapi.go @@ -0,0 +1,93 @@ +package eddilithium3 + +import ( + "crypto/rand" + "encoding/asn1" + + "github.com/cloudflare/circl/sign" +) + +var sch sign.Scheme = &scheme{} + +// Scheme returns a signature interface. +func Scheme() sign.Scheme { return sch } + +type scheme struct{} + +func (*scheme) Name() string { return "Ed448-Dilithium3" } +func (*scheme) PublicKeySize() int { return PublicKeySize } +func (*scheme) PrivateKeySize() int { return PrivateKeySize } +func (*scheme) SignatureSize() int { return SignatureSize } +func (*scheme) SeedSize() int { return SeedSize } +func (*scheme) TLSIdentifier() uint { return 0xfe62 /* temp */ } +func (*scheme) SupportsContext() bool { return false } +func (*scheme) Oid() asn1.ObjectIdentifier { + return asn1.ObjectIdentifier{1, 3, 6, 1, 4, 1, 44363, 45, 10} +} + +func (*scheme) GenerateKey() (sign.PublicKey, sign.PrivateKey, error) { + return GenerateKey(rand.Reader) +} + +func (*scheme) Sign( + sk sign.PrivateKey, + message []byte, + opts *sign.SignatureOpts, +) []byte { + priv, ok := sk.(*PrivateKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + panic(sign.ErrContextNotSupported) + } + var sig [SignatureSize]byte + SignTo(priv, message, sig[:]) + return sig[:] +} + +func (*scheme) Verify( + pk sign.PublicKey, + message, signature []byte, + opts *sign.SignatureOpts, +) bool { + pub, ok := pk.(*PublicKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + panic(sign.ErrContextNotSupported) + } + return Verify(pub, message, signature) +} + +func (*scheme) DeriveKey(seed []byte) (sign.PublicKey, sign.PrivateKey) { + if len(seed) != SeedSize { + panic(sign.ErrSeedSize) + } + var tmp [SeedSize]byte + copy(tmp[:], seed) + return NewKeyFromSeed(&tmp) +} + +func (*scheme) UnmarshalBinaryPublicKey(buf []byte) (sign.PublicKey, error) { + if len(buf) != PublicKeySize { + return nil, sign.ErrPubKeySize + } + var tmp [PublicKeySize]byte + copy(tmp[:], buf) + var ret PublicKey + ret.Unpack(&tmp) + return &ret, nil +} + +func (*scheme) UnmarshalBinaryPrivateKey(buf []byte) (sign.PrivateKey, error) { + if len(buf) != PrivateKeySize { + return nil, sign.ErrPrivKeySize + } + var tmp [PrivateKeySize]byte + copy(tmp[:], buf) + var ret PrivateKey + ret.Unpack(&tmp) + return &ret, nil +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/amd64.go b/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/amd64.go new file mode 100644 index 0000000..d5d224e --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/amd64.go @@ -0,0 +1,154 @@ +//go:build amd64 && !purego +// +build amd64,!purego + +package dilithium + +import ( + "golang.org/x/sys/cpu" +) + +// Execute an in-place forward NTT on as. +// +// Assumes the coefficients are in Montgomery representation and bounded +// by 2*Q. The resulting coefficients are again in Montgomery representation, +// but are only bounded bt 18*Q. +func (p *Poly) NTT() { + if cpu.X86.HasAVX2 { + nttAVX2( + (*[N]uint32)(p), + ) + } else { + p.nttGeneric() + } +} + +// Execute an in-place inverse NTT and multiply by Montgomery factor R +// +// Assumes the coefficients are in Montgomery representation and bounded +// by 2*Q. The resulting coefficients are again in Montgomery representation +// and bounded by 2*Q. +func (p *Poly) InvNTT() { + if cpu.X86.HasAVX2 { + invNttAVX2( + (*[N]uint32)(p), + ) + } else { + p.invNttGeneric() + } +} + +// Sets p to the polynomial whose coefficients are the pointwise multiplication +// of those of a and b. The coefficients of p are bounded by 2q. +// +// Assumes a and b are in Montgomery form and that the pointwise product +// of each coefficient is below 2³² q. +func (p *Poly) MulHat(a, b *Poly) { + if cpu.X86.HasAVX2 { + mulHatAVX2( + (*[N]uint32)(p), + (*[N]uint32)(a), + (*[N]uint32)(b), + ) + } else { + p.mulHatGeneric(a, b) + } +} + +// Sets p to a + b. Does not normalize polynomials. +func (p *Poly) Add(a, b *Poly) { + if cpu.X86.HasAVX2 { + addAVX2( + (*[N]uint32)(p), + (*[N]uint32)(a), + (*[N]uint32)(b), + ) + } else { + p.addGeneric(a, b) + } +} + +// Sets p to a - b. +// +// Warning: assumes coefficients of b are less than 2q. +// Sets p to a + b. Does not normalize polynomials. +func (p *Poly) Sub(a, b *Poly) { + if cpu.X86.HasAVX2 { + subAVX2( + (*[N]uint32)(p), + (*[N]uint32)(a), + (*[N]uint32)(b), + ) + } else { + p.subGeneric(a, b) + } +} + +// Writes p whose coefficients are in [0, 16) to buf, which must be of +// length N/2. +func (p *Poly) PackLe16(buf []byte) { + if cpu.X86.HasAVX2 { + if len(buf) < PolyLe16Size { + panic("buf too small") + } + packLe16AVX2( + (*[N]uint32)(p), + &buf[0], + ) + } else { + p.packLe16Generic(buf) + } +} + +// Reduces each of the coefficients to <2q. +func (p *Poly) ReduceLe2Q() { + if cpu.X86.HasAVX2 { + reduceLe2QAVX2((*[N]uint32)(p)) + } else { + p.reduceLe2QGeneric() + } +} + +// Reduce each of the coefficients to > 23 + x2 := x & 0x7FFFFF // 2²³-1 + return x2 + (x1 << 13) - x1 +} + +// Returns x mod q. +func modQ(x uint32) uint32 { + return le2qModQ(ReduceLe2Q(x)) +} + +// For x R ≤ q 2³², find y ≤ 2q with y = x mod q. +func montReduceLe2Q(x uint64) uint32 { + // Qinv = 4236238847 = -(q⁻¹) mod 2³² + m := (x * Qinv) & 0xffffffff + return uint32((x + m*uint64(Q)) >> 32) +} + +// Returns x mod q for 0 ≤ x < 2q. +func le2qModQ(x uint32) uint32 { + x -= Q + mask := uint32(int32(x) >> 31) // mask is 2³²-1 if x was neg.; 0 otherwise + return x + (mask & Q) +} + +// Splits 0 ≤ a < Q into a0 and a1 with a = a1*2ᴰ + a0 +// and -2ᴰ⁻¹ < a0 < 2ᴰ⁻¹. Returns a0 + Q and a1. +func power2round(a uint32) (a0plusQ, a1 uint32) { + // We effectively compute a0 = a mod± 2ᵈ + // and a1 = (a - a0) / 2ᵈ. + a0 := a & ((1 << D) - 1) // a mod 2ᵈ + + // a0 is one of 0, 1, ..., 2ᵈ⁻¹-1, 2ᵈ⁻¹, 2ᵈ⁻¹+1, ..., 2ᵈ-1 + a0 -= (1 << (D - 1)) + 1 + // now a0 is -2ᵈ⁻¹-1, -2ᵈ⁻¹, ..., -2, -1, 0, ..., 2ᵈ⁻¹-2 + // Next, we add 2ᴰ to those a0 that are negative (seen as int32). + a0 += uint32(int32(a0)>>31) & (1 << D) + // now a0 is 2ᵈ⁻¹-1, 2ᵈ⁻¹, ..., 2ᵈ-2, 2ᵈ-1, 0, ..., 2ᵈ⁻¹-2 + a0 -= (1 << (D - 1)) - 1 + // now a0 id 0, 1, 2, ..., 2ᵈ⁻¹-1, 2ᵈ⁻¹-1, -2ᵈ⁻¹-1, ... + // which is what we want. + a0plusQ = Q + a0 + a1 = (a - a0) >> D + return +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/generic.go b/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/generic.go new file mode 100644 index 0000000..25321f5 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/generic.go @@ -0,0 +1,81 @@ +//go:build !amd64 || purego +// +build !amd64 purego + +package dilithium + +// Execute an in-place forward NTT on as. +// +// Assumes the coefficients are in Montgomery representation and bounded +// by 2*Q. The resulting coefficients are again in Montgomery representation, +// but are only bounded bt 18*Q. +func (p *Poly) NTT() { + p.nttGeneric() +} + +// Execute an in-place inverse NTT and multiply by Montgomery factor R +// +// Assumes the coefficients are in Montgomery representation and bounded +// by 2*Q. The resulting coefficients are again in Montgomery representation +// and bounded by 2*Q. +func (p *Poly) InvNTT() { + p.invNttGeneric() +} + +// Sets p to the polynomial whose coefficients are the pointwise multiplication +// of those of a and b. The coefficients of p are bounded by 2q. +// +// Assumes a and b are in Montgomery form and that the pointwise product +// of each coefficient is below 2³² q. +func (p *Poly) MulHat(a, b *Poly) { + p.mulHatGeneric(a, b) +} + +// Sets p to a + b. Does not normalize polynomials. +func (p *Poly) Add(a, b *Poly) { + p.addGeneric(a, b) +} + +// Sets p to a - b. +// +// Warning: assumes coefficients of b are less than 2q. +// Sets p to a + b. Does not normalize polynomials. +func (p *Poly) Sub(a, b *Poly) { + p.subGeneric(a, b) +} + +// Writes p whose coefficients are in [0, 16) to buf, which must be of +// length N/2. +func (p *Poly) PackLe16(buf []byte) { + p.packLe16Generic(buf) +} + +// Reduces each of the coefficients to <2q. +func (p *Poly) ReduceLe2Q() { + p.reduceLe2QGeneric() +} + +// Reduce each of the coefficients to 0; l >>= 1 { + // On the n-th iteration of the l-loop, the coefficients start off + // bounded by n*2*Q. + // + // offset effectively loops over the row groups in this column; it + // is the first row in the row group. + for offset := uint(0); offset < N-l; offset += 2 * l { + k++ + zeta := uint64(Zetas[k]) + + // j loops over each butterfly in the row group. + for j := offset; j < offset+l; j++ { + t := montReduceLe2Q(zeta * uint64(p[j+l])) + p[j+l] = p[j] + (2*Q - t) // Cooley--Tukey butterfly + p[j] += t + } + } + } +} + +// Execute an in-place inverse NTT and multiply by Montgomery factor R +// +// Assumes the coefficients are in Montgomery representation and bounded +// by 2*Q. The resulting coefficients are again in Montgomery representation +// and bounded by 2*Q. +func (p *Poly) invNttGeneric() { + k := 0 // Index into InvZetas + + // We basically do the opposite of NTT, but postpone dividing by 2 in the + // inverse of the Cooley--Tukey butterfly and accumulate that to a big + // division by 2⁸ at the end. See comments in the NTT() function. + + for l := uint(1); l < N; l <<= 1 { + // On the n-th iteration of the l-loop, the coefficients start off + // bounded by 2ⁿ⁻¹*2*Q, so by 256*Q on the last. + for offset := uint(0); offset < N-l; offset += 2 * l { + zeta := uint64(InvZetas[k]) + k++ + for j := offset; j < offset+l; j++ { + t := p[j] // Gentleman--Sande butterfly + p[j] = t + p[j+l] + t += 256*Q - p[j+l] + p[j+l] = montReduceLe2Q(zeta * uint64(t)) + } + } + } + + for j := uint(0); j < N; j++ { + // ROver256 = 41978 = (256)⁻¹ R² + p[j] = montReduceLe2Q(ROver256 * uint64(p[j])) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/pack.go b/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/pack.go new file mode 100644 index 0000000..4b952a0 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/pack.go @@ -0,0 +1,160 @@ +package dilithium + +// Sets p to the polynomial whose coefficients are less than 1024 encoded +// into buf (which must be of size PolyT1Size). +// +// p will be normalized. +func (p *Poly) UnpackT1(buf []byte) { + j := 0 + for i := 0; i < PolyT1Size; i += 5 { + p[j] = (uint32(buf[i]) | (uint32(buf[i+1]) << 8)) & 0x3ff + p[j+1] = (uint32(buf[i+1]>>2) | (uint32(buf[i+2]) << 6)) & 0x3ff + p[j+2] = (uint32(buf[i+2]>>4) | (uint32(buf[i+3]) << 4)) & 0x3ff + p[j+3] = (uint32(buf[i+3]>>6) | (uint32(buf[i+4]) << 2)) & 0x3ff + j += 4 + } +} + +// Writes p whose coefficients are in (-2ᵈ⁻¹, 2ᵈ⁻¹] into buf which +// has to be of length at least PolyT0Size. +// +// Assumes that the coefficients are not normalized, but lie in the +// range (q-2ᵈ⁻¹, q+2ᵈ⁻¹]. +func (p *Poly) PackT0(buf []byte) { + j := 0 + for i := 0; i < PolyT0Size; i += 13 { + p0 := Q + (1 << (D - 1)) - p[j] + p1 := Q + (1 << (D - 1)) - p[j+1] + p2 := Q + (1 << (D - 1)) - p[j+2] + p3 := Q + (1 << (D - 1)) - p[j+3] + p4 := Q + (1 << (D - 1)) - p[j+4] + p5 := Q + (1 << (D - 1)) - p[j+5] + p6 := Q + (1 << (D - 1)) - p[j+6] + p7 := Q + (1 << (D - 1)) - p[j+7] + + buf[i] = byte(p0 >> 0) + buf[i+1] = byte(p0>>8) | byte(p1<<5) + buf[i+2] = byte(p1 >> 3) + buf[i+3] = byte(p1>>11) | byte(p2<<2) + buf[i+4] = byte(p2>>6) | byte(p3<<7) + buf[i+5] = byte(p3 >> 1) + buf[i+6] = byte(p3>>9) | byte(p4<<4) + buf[i+7] = byte(p4 >> 4) + buf[i+8] = byte(p4>>12) | byte(p5<<1) + buf[i+9] = byte(p5>>7) | byte(p6<<6) + buf[i+10] = byte(p6 >> 2) + buf[i+11] = byte(p6>>10) | byte(p7<<3) + buf[i+12] = byte(p7 >> 5) + j += 8 + } +} + +// Sets p to the polynomial packed into buf by PackT0. +// +// The coefficients of p will not be normalized, but will lie +// in (-2ᵈ⁻¹, 2ᵈ⁻¹]. +func (p *Poly) UnpackT0(buf []byte) { + j := 0 + for i := 0; i < PolyT0Size; i += 13 { + p[j] = Q + (1 << (D - 1)) - ((uint32(buf[i]) | + (uint32(buf[i+1]) << 8)) & 0x1fff) + p[j+1] = Q + (1 << (D - 1)) - (((uint32(buf[i+1]) >> 5) | + (uint32(buf[i+2]) << 3) | + (uint32(buf[i+3]) << 11)) & 0x1fff) + p[j+2] = Q + (1 << (D - 1)) - (((uint32(buf[i+3]) >> 2) | + (uint32(buf[i+4]) << 6)) & 0x1fff) + p[j+3] = Q + (1 << (D - 1)) - (((uint32(buf[i+4]) >> 7) | + (uint32(buf[i+5]) << 1) | + (uint32(buf[i+6]) << 9)) & 0x1fff) + p[j+4] = Q + (1 << (D - 1)) - (((uint32(buf[i+6]) >> 4) | + (uint32(buf[i+7]) << 4) | + (uint32(buf[i+8]) << 12)) & 0x1fff) + p[j+5] = Q + (1 << (D - 1)) - (((uint32(buf[i+8]) >> 1) | + (uint32(buf[i+9]) << 7)) & 0x1fff) + p[j+6] = Q + (1 << (D - 1)) - (((uint32(buf[i+9]) >> 6) | + (uint32(buf[i+10]) << 2) | + (uint32(buf[i+11]) << 10)) & 0x1fff) + p[j+7] = Q + (1 << (D - 1)) - ((uint32(buf[i+11]) >> 3) | + (uint32(buf[i+12]) << 5)) + + j += 8 + } +} + +// Writes p whose coefficients are less than 1024 into buf, which must be +// of size at least PolyT1Size . +// +// Assumes coefficients of p are normalized. +func (p *Poly) PackT1(buf []byte) { + j := 0 + for i := 0; i < PolyT1Size; i += 5 { + buf[i] = byte(p[j]) + buf[i+1] = byte(p[j]>>8) | byte(p[j+1]<<2) + buf[i+2] = byte(p[j+1]>>6) | byte(p[j+2]<<4) + buf[i+3] = byte(p[j+2]>>4) | byte(p[j+3]<<6) + buf[i+4] = byte(p[j+3] >> 2) + j += 4 + } +} + +// Writes p whose coefficients are in [0, 16) to buf, which must be of +// length N/2. +func (p *Poly) packLe16Generic(buf []byte) { + j := 0 + for i := 0; i < PolyLe16Size; i++ { + buf[i] = byte(p[j]) | byte(p[j+1]<<4) + j += 2 + } +} + +// Writes p with 60 non-zero coefficients {-1,1} to buf, which must have +// length 40. +func (p *Poly) PackB60(buf []byte) { + // We start with a mask of the non-zero positions of p (which is 32 bytes) + // and then append 60 packed bits, where a one indicates a negative + // coefficients. + var signs uint64 + mask := uint64(1) + for i := 0; i < 32; i++ { + buf[i] = 0 + for j := 0; j < 8; j++ { + if p[8*i+j] != 0 { + buf[i] |= 1 << uint(j) + if p[8*i+j] == Q-1 { + signs |= mask + } + mask <<= 1 + } + } + } + for i := uint64(0); i < 8; i++ { + buf[i+32] = uint8(signs >> (8 * i)) + } +} + +// UnpackB60 sets p to the polynomial packed into buf with Poly.PackB60(). +// +// Returns whether unpacking was successful. +func (p *Poly) UnpackB60(buf []byte) bool { + *p = Poly{} // zero p + signs := (uint64(buf[32]) | (uint64(buf[33]) << 8) | + (uint64(buf[34]) << 16) | (uint64(buf[35]) << 24) | + (uint64(buf[36]) << 32) | (uint64(buf[37]) << 40) | + (uint64(buf[38]) << 48) | (uint64(buf[39]) << 56)) + if signs>>60 != 0 { + return false // ensure unused bits are zero for strong unforgeability + } + + for i := 0; i < 32; i++ { + for j := 0; j < 8; j++ { + if (buf[i]>>uint(j))&1 == 1 { + p[8*i+j] = 1 + // Note 1 ^ (1 | (Q-1)) = Q-1 and (-1)&x = x + p[8*i+j] ^= uint32(-(signs & 1)) & (1 | (Q - 1)) + signs >>= 1 + } + } + } + + return true +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/params.go b/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/params.go new file mode 100644 index 0000000..f423217 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/params.go @@ -0,0 +1,18 @@ +package dilithium + +import ( + "github.com/cloudflare/circl/sign/internal/dilithium/params" +) + +const ( + SeedSize = params.SeedSize + N = params.N + Q = params.Q + QBits = params.QBits + Qinv = params.Qinv + ROver256 = params.ROver256 + D = params.D + PolyT1Size = params.PolyT1Size + PolyT0Size = params.PolyT0Size + PolyLe16Size = params.PolyLe16Size +) diff --git a/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/params/params.go b/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/params/params.go new file mode 100644 index 0000000..2df20e3 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/params/params.go @@ -0,0 +1,25 @@ +package params + +// We put these parameters in a separate package so that the Go code, +// such as ntt_amd64_src.go, that generates assembler can import it. + +const ( + SeedSize = 32 + N = 256 + Q = 8380417 // 2²³ - 2¹³ + 1 + QBits = 23 + Qinv = 4236238847 // = -(q^-1) mod 2³² + ROver256 = 41978 // = (256)⁻¹ R² mod q, where R=2³² + D = 13 + + // Size of T1 packed. (Note that the formula is not valid in general, + // but it is for the parameters used in the modes of Dilithium.) + PolyT1Size = (N * (QBits - D)) / 8 + + // Size of T0 packed. (Note that the formula is not valid in general, + // but it is for the parameters used in the modes of Dilithium.) + PolyT0Size = (N * D) / 8 + + // Size of a packed polynomial whose coefficients are in [0,16). + PolyLe16Size = N / 2 +) diff --git a/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/poly.go b/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/poly.go new file mode 100644 index 0000000..96c0551 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/poly.go @@ -0,0 +1,101 @@ +package dilithium + +// An element of our base ring R which are polynomials over Z_q modulo +// the equation Xᴺ = -1, where q=2²³ - 2¹³ + 1 and N=256. +// +// Coefficients aren't always reduced. See Normalize(). +type Poly [N]uint32 + +// Reduces each of the coefficients to <2q. +func (p *Poly) reduceLe2QGeneric() { + for i := uint(0); i < N; i++ { + p[i] = ReduceLe2Q(p[i]) + } +} + +// Reduce each of the coefficients to > 31) + // Sets x to {0, 1, ..., (Q-1)/2, (Q-1)/2, ..., 1} + x = int32((Q-1)/2) - x + if uint32(x) >= bound { + return true + } + } + return false +} + +// Splits p into p1 and p0 such that [i]p1 * 2ᴰ + [i]p0 = [i]p +// with -2ᴰ⁻¹ < [i]p0 ≤ 2ᴰ⁻¹. Returns p0 + Q and p1. +// +// Requires the coefficients of p to be normalized. +func (p *Poly) Power2Round(p0PlusQ, p1 *Poly) { + for i := 0; i < N; i++ { + p0PlusQ[i], p1[i] = power2round(p[i]) + } +} + +// Sets p to the polynomial whose coefficients are the pointwise multiplication +// of those of a and b. The coefficients of p are bounded by 2q. +// +// Assumes a and b are in Montgomery form and that the pointwise product +// of each coefficient is below 2³² q. +func (p *Poly) mulHatGeneric(a, b *Poly) { + for i := 0; i < N; i++ { + p[i] = montReduceLe2Q(uint64(a[i]) * uint64(b[i])) + } +} + +// Sets p to 2ᵈ q without reducing. +// +// So it requires the coefficients of p to be less than 2³²⁻ᴰ. +func (p *Poly) mulBy2toDGeneric(q *Poly) { + for i := 0; i < N; i++ { + p[i] = q[i] << D + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/stubs_amd64.go b/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/stubs_amd64.go new file mode 100644 index 0000000..ca92f15 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/internal/dilithium/stubs_amd64.go @@ -0,0 +1,35 @@ +// Code generated by command: go run src.go -out ../amd64.s -stubs ../stubs_amd64.go -pkg dilithium. DO NOT EDIT. + +//go:build amd64 && !purego + +package dilithium + +//go:noescape +func nttAVX2(p *[256]uint32) + +//go:noescape +func invNttAVX2(p *[256]uint32) + +//go:noescape +func mulHatAVX2(p *[256]uint32, a *[256]uint32, b *[256]uint32) + +//go:noescape +func addAVX2(p *[256]uint32, a *[256]uint32, b *[256]uint32) + +//go:noescape +func subAVX2(p *[256]uint32, a *[256]uint32, b *[256]uint32) + +//go:noescape +func packLe16AVX2(p *[256]uint32, buf *byte) + +//go:noescape +func reduceLe2QAVX2(p *[256]uint32) + +//go:noescape +func le2qModQAVX2(p *[256]uint32) + +//go:noescape +func exceedsAVX2(p *[256]uint32, bound uint32) uint8 + +//go:noescape +func mulBy2toDAVX2(p *[256]uint32, q *[256]uint32) diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/dilithium.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/dilithium.go new file mode 100644 index 0000000..4b640f0 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/dilithium.go @@ -0,0 +1,361 @@ +// Code generated from pkg.templ.go. DO NOT EDIT. + +// mldsa44 implements NIST signature scheme ML-DSA-44 as defined in FIPS204. +package mldsa44 + +import ( + "crypto" + cryptoRand "crypto/rand" + "encoding/asn1" + "errors" + "io" + + "github.com/cloudflare/circl/sign" + common "github.com/cloudflare/circl/sign/internal/dilithium" + "github.com/cloudflare/circl/sign/mldsa/mldsa44/internal" +) + +const ( + // Size of seed for NewKeyFromSeed + SeedSize = common.SeedSize + + // Size of a packed PublicKey + PublicKeySize = internal.PublicKeySize + + // Size of a packed PrivateKey + PrivateKeySize = internal.PrivateKeySize + + // Size of a signature + SignatureSize = internal.SignatureSize +) + +// PublicKey is the type of ML-DSA-44 public key +type PublicKey internal.PublicKey + +// PrivateKey is the type of ML-DSA-44 private key +type PrivateKey internal.PrivateKey + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error) { + pk, sk, err := internal.GenerateKey(rand) + return (*PublicKey)(pk), (*PrivateKey)(sk), err +} + +// NewKeyFromSeed derives a public/private key pair using the given seed. +func NewKeyFromSeed(seed *[SeedSize]byte) (*PublicKey, *PrivateKey) { + pk, sk := internal.NewKeyFromSeed(seed) + return (*PublicKey)(pk), (*PrivateKey)(sk) +} + +// SignTo signs the given message and writes the signature into signature. +// It will panic if signature is not of length at least SignatureSize. +// +// ctx is the optional context string. Errors if ctx is larger than 255 bytes. +// A nil context string is equivalent to an empty context string. +func SignTo(sk *PrivateKey, msg, ctx []byte, randomized bool, sig []byte) error { + var rnd [32]byte + if randomized { + _, err := cryptoRand.Read(rnd[:]) + if err != nil { + return err + } + } + + if len(ctx) > 255 { + return sign.ErrContextTooLong + } + + internal.SignTo( + (*internal.PrivateKey)(sk), + func(w io.Writer) { + _, _ = w.Write([]byte{0}) + _, _ = w.Write([]byte{byte(len(ctx))}) + + if ctx != nil { + _, _ = w.Write(ctx) + } + w.Write(msg) + }, + rnd, + sig, + ) + return nil +} + +// Do not use. Implements ML-DSA.Sign_internal used for compatibility tests. +func (sk *PrivateKey) unsafeSignInternal(msg []byte, rnd [32]byte) []byte { + var ret [SignatureSize]byte + internal.SignTo( + (*internal.PrivateKey)(sk), + func(w io.Writer) { + _, _ = w.Write(msg) + }, + rnd, + ret[:], + ) + return ret[:] +} + +// Do not use. Implements ML-DSA.Verify_internal used for compatibility tests. +func unsafeVerifyInternal(pk *PublicKey, msg, sig []byte) bool { + return internal.Verify( + (*internal.PublicKey)(pk), + func(w io.Writer) { + _, _ = w.Write(msg) + }, + sig, + ) +} + +// Verify checks whether the given signature by pk on msg is valid. +// +// ctx is the optional context string. Fails if ctx is larger than 255 bytes. +// A nil context string is equivalent to an empty context string. +func Verify(pk *PublicKey, msg, ctx, sig []byte) bool { + if len(ctx) > 255 { + return false + } + return internal.Verify( + (*internal.PublicKey)(pk), + func(w io.Writer) { + _, _ = w.Write([]byte{0}) + _, _ = w.Write([]byte{byte(len(ctx))}) + + if ctx != nil { + _, _ = w.Write(ctx) + } + _, _ = w.Write(msg) + }, + sig, + ) +} + +// Sets pk to the public key encoded in buf. +func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte) { + (*internal.PublicKey)(pk).Unpack(buf) +} + +// Sets sk to the private key encoded in buf. +func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte) { + (*internal.PrivateKey)(sk).Unpack(buf) +} + +// Packs the public key into buf. +func (pk *PublicKey) Pack(buf *[PublicKeySize]byte) { + (*internal.PublicKey)(pk).Pack(buf) +} + +// Packs the private key into buf. +func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte) { + (*internal.PrivateKey)(sk).Pack(buf) +} + +// Packs the public key. +func (pk *PublicKey) Bytes() []byte { + var buf [PublicKeySize]byte + pk.Pack(&buf) + return buf[:] +} + +// Packs the private key. +func (sk *PrivateKey) Bytes() []byte { + var buf [PrivateKeySize]byte + sk.Pack(&buf) + return buf[:] +} + +// Packs the public key. +func (pk *PublicKey) MarshalBinary() ([]byte, error) { + return pk.Bytes(), nil +} + +// Packs the private key. +func (sk *PrivateKey) MarshalBinary() ([]byte, error) { + return sk.Bytes(), nil +} + +// Unpacks the public key from data. +func (pk *PublicKey) UnmarshalBinary(data []byte) error { + if len(data) != PublicKeySize { + return errors.New("packed public key must be of mldsa44.PublicKeySize bytes") + } + var buf [PublicKeySize]byte + copy(buf[:], data) + pk.Unpack(&buf) + return nil +} + +// Unpacks the private key from data. +func (sk *PrivateKey) UnmarshalBinary(data []byte) error { + if len(data) != PrivateKeySize { + return errors.New("packed private key must be of mldsa44.PrivateKeySize bytes") + } + var buf [PrivateKeySize]byte + copy(buf[:], data) + sk.Unpack(&buf) + return nil +} + +// Sign signs the given message. +// +// opts.HashFunc() must return zero, which can be achieved by passing +// crypto.Hash(0) for opts. rand is ignored. Will only return an error +// if opts.HashFunc() is non-zero. +// +// This function is used to make PrivateKey implement the crypto.Signer +// interface. The package-level SignTo function might be more convenient +// to use. +func (sk *PrivateKey) Sign(rand io.Reader, msg []byte, opts crypto.SignerOpts) ( + sig []byte, err error) { + var ret [SignatureSize]byte + + if opts.HashFunc() != crypto.Hash(0) { + return nil, errors.New("dilithium: cannot sign hashed message") + } + if err = SignTo(sk, msg, nil, false, ret[:]); err != nil { + return nil, err + } + + return ret[:], nil +} + +// Computes the public key corresponding to this private key. +// +// Returns a *PublicKey. The type crypto.PublicKey is used to make +// PrivateKey implement the crypto.Signer interface. +func (sk *PrivateKey) Public() crypto.PublicKey { + return (*PublicKey)((*internal.PrivateKey)(sk).Public()) +} + +// Equal returns whether the two private keys equal. +func (sk *PrivateKey) Equal(other crypto.PrivateKey) bool { + castOther, ok := other.(*PrivateKey) + if !ok { + return false + } + return (*internal.PrivateKey)(sk).Equal((*internal.PrivateKey)(castOther)) +} + +// Equal returns whether the two public keys equal. +func (pk *PublicKey) Equal(other crypto.PublicKey) bool { + castOther, ok := other.(*PublicKey) + if !ok { + return false + } + return (*internal.PublicKey)(pk).Equal((*internal.PublicKey)(castOther)) +} + +// Boilerplate for generic signatures API + +type scheme struct{} + +var sch sign.Scheme = &scheme{} + +// Scheme returns a generic signature interface for ML-DSA-44. +func Scheme() sign.Scheme { return sch } + +func (*scheme) Name() string { return "ML-DSA-44" } +func (*scheme) PublicKeySize() int { return PublicKeySize } +func (*scheme) PrivateKeySize() int { return PrivateKeySize } +func (*scheme) SignatureSize() int { return SignatureSize } +func (*scheme) SeedSize() int { return SeedSize } + +// TODO TLSIdentifier() +func (*scheme) Oid() asn1.ObjectIdentifier { + return asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 17} +} + +func (*scheme) SupportsContext() bool { + return true +} + +func (*scheme) GenerateKey() (sign.PublicKey, sign.PrivateKey, error) { + return GenerateKey(nil) +} + +func (*scheme) Sign( + sk sign.PrivateKey, + msg []byte, + opts *sign.SignatureOpts, +) []byte { + var ctx []byte + sig := make([]byte, SignatureSize) + + priv, ok := sk.(*PrivateKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + ctx = []byte(opts.Context) + } + err := SignTo(priv, msg, ctx, false, sig) + if err != nil { + panic(err) + } + + return sig +} + +func (*scheme) Verify( + pk sign.PublicKey, + msg, sig []byte, + opts *sign.SignatureOpts, +) bool { + var ctx []byte + pub, ok := pk.(*PublicKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + ctx = []byte(opts.Context) + } + return Verify(pub, msg, ctx, sig) +} + +func (*scheme) DeriveKey(seed []byte) (sign.PublicKey, sign.PrivateKey) { + if len(seed) != SeedSize { + panic(sign.ErrSeedSize) + } + var seed2 [SeedSize]byte + copy(seed2[:], seed) + return NewKeyFromSeed(&seed2) +} + +func (*scheme) UnmarshalBinaryPublicKey(buf []byte) (sign.PublicKey, error) { + if len(buf) != PublicKeySize { + return nil, sign.ErrPubKeySize + } + + var ( + buf2 [PublicKeySize]byte + ret PublicKey + ) + + copy(buf2[:], buf) + ret.Unpack(&buf2) + return &ret, nil +} + +func (*scheme) UnmarshalBinaryPrivateKey(buf []byte) (sign.PrivateKey, error) { + if len(buf) != PrivateKeySize { + return nil, sign.ErrPrivKeySize + } + + var ( + buf2 [PrivateKeySize]byte + ret PrivateKey + ) + + copy(buf2[:], buf) + ret.Unpack(&buf2) + return &ret, nil +} + +func (sk *PrivateKey) Scheme() sign.Scheme { + return sch +} + +func (sk *PublicKey) Scheme() sign.Scheme { + return sch +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/dilithium.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/dilithium.go new file mode 100644 index 0000000..8f1c8e5 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/dilithium.go @@ -0,0 +1,491 @@ +// Code generated from mode3/internal/dilithium.go by gen.go + +package internal + +import ( + cryptoRand "crypto/rand" + "crypto/subtle" + "io" + + "github.com/cloudflare/circl/internal/sha3" + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +const ( + // Size of a packed polynomial of norm ≤η. + // (Note that the formula is not valid in general.) + PolyLeqEtaSize = (common.N * DoubleEtaBits) / 8 + + // β = τη, the maximum size of c s₂. + Beta = Tau * Eta + + // γ₁ range of y + Gamma1 = 1 << Gamma1Bits + + // Size of packed polynomial of norm <γ₁ such as z + PolyLeGamma1Size = (Gamma1Bits + 1) * common.N / 8 + + // α = 2γ₂ parameter for decompose + Alpha = 2 * Gamma2 + + // Size of a packed private key + PrivateKeySize = 32 + 32 + TRSize + PolyLeqEtaSize*(L+K) + common.PolyT0Size*K + + // Size of a packed public key + PublicKeySize = 32 + common.PolyT1Size*K + + // Size of a packed signature + SignatureSize = L*PolyLeGamma1Size + Omega + K + CTildeSize + + // Size of packed w₁ + PolyW1Size = (common.N * (common.QBits - Gamma1Bits)) / 8 +) + +// PublicKey is the type of Dilithium public keys. +type PublicKey struct { + rho [32]byte + t1 VecK + + // Cached values + t1p [common.PolyT1Size * K]byte + A *Mat + tr *[TRSize]byte +} + +// PrivateKey is the type of Dilithium private keys. +type PrivateKey struct { + rho [32]byte + key [32]byte + s1 VecL + s2 VecK + t0 VecK + tr [TRSize]byte + + // Cached values + A Mat // ExpandA(ρ) + s1h VecL // NTT(s₁) + s2h VecK // NTT(s₂) + t0h VecK // NTT(t₀) +} + +type unpackedSignature struct { + z VecL + hint VecK + c [CTildeSize]byte +} + +// Packs the signature into buf. +func (sig *unpackedSignature) Pack(buf []byte) { + copy(buf[:], sig.c[:]) + sig.z.PackLeGamma1(buf[CTildeSize:]) + sig.hint.PackHint(buf[CTildeSize+L*PolyLeGamma1Size:]) +} + +// Sets sig to the signature encoded in the buffer. +// +// Returns whether buf contains a properly packed signature. +func (sig *unpackedSignature) Unpack(buf []byte) bool { + if len(buf) < SignatureSize { + return false + } + copy(sig.c[:], buf[:]) + sig.z.UnpackLeGamma1(buf[CTildeSize:]) + if sig.z.Exceeds(Gamma1 - Beta) { + return false + } + if !sig.hint.UnpackHint(buf[CTildeSize+L*PolyLeGamma1Size:]) { + return false + } + return true +} + +// Packs the public key into buf. +func (pk *PublicKey) Pack(buf *[PublicKeySize]byte) { + copy(buf[:32], pk.rho[:]) + copy(buf[32:], pk.t1p[:]) +} + +// Sets pk to the public key encoded in buf. +func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte) { + copy(pk.rho[:], buf[:32]) + copy(pk.t1p[:], buf[32:]) + + pk.t1.UnpackT1(pk.t1p[:]) + pk.A = new(Mat) + pk.A.Derive(&pk.rho) + + // tr = CRH(ρ ‖ t1) = CRH(pk) + pk.tr = new([TRSize]byte) + h := sha3.NewShake256() + _, _ = h.Write(buf[:]) + _, _ = h.Read(pk.tr[:]) +} + +// Packs the private key into buf. +func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte) { + copy(buf[:32], sk.rho[:]) + copy(buf[32:64], sk.key[:]) + copy(buf[64:64+TRSize], sk.tr[:]) + offset := 64 + TRSize + sk.s1.PackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * L + sk.s2.PackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * K + sk.t0.PackT0(buf[offset:]) +} + +// Sets sk to the private key encoded in buf. +func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte) { + copy(sk.rho[:], buf[:32]) + copy(sk.key[:], buf[32:64]) + copy(sk.tr[:], buf[64:64+TRSize]) + offset := 64 + TRSize + sk.s1.UnpackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * L + sk.s2.UnpackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * K + sk.t0.UnpackT0(buf[offset:]) + + // Cached values + sk.A.Derive(&sk.rho) + sk.t0h = sk.t0 + sk.t0h.NTT() + sk.s1h = sk.s1 + sk.s1h.NTT() + sk.s2h = sk.s2 + sk.s2h.NTT() +} + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error) { + var seed [32]byte + if rand == nil { + rand = cryptoRand.Reader + } + _, err := io.ReadFull(rand, seed[:]) + if err != nil { + return nil, nil, err + } + pk, sk := NewKeyFromSeed(&seed) + return pk, sk, nil +} + +// NewKeyFromSeed derives a public/private key pair using the given seed. +func NewKeyFromSeed(seed *[common.SeedSize]byte) (*PublicKey, *PrivateKey) { + var eSeed [128]byte // expanded seed + var pk PublicKey + var sk PrivateKey + var sSeed [64]byte + + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + + if NIST { + _, _ = h.Write([]byte{byte(K), byte(L)}) + } + + _, _ = h.Read(eSeed[:]) + + copy(pk.rho[:], eSeed[:32]) + copy(sSeed[:], eSeed[32:96]) + copy(sk.key[:], eSeed[96:]) + copy(sk.rho[:], pk.rho[:]) + + sk.A.Derive(&pk.rho) + + for i := uint16(0); i < L; i++ { + PolyDeriveUniformLeqEta(&sk.s1[i], &sSeed, i) + } + + for i := uint16(0); i < K; i++ { + PolyDeriveUniformLeqEta(&sk.s2[i], &sSeed, i+L) + } + + sk.s1h = sk.s1 + sk.s1h.NTT() + sk.s2h = sk.s2 + sk.s2h.NTT() + + sk.computeT0andT1(&sk.t0, &pk.t1) + + sk.t0h = sk.t0 + sk.t0h.NTT() + + // Complete public key far enough to be packed + pk.t1.PackT1(pk.t1p[:]) + pk.A = &sk.A + + // Finish private key + var packedPk [PublicKeySize]byte + pk.Pack(&packedPk) + + // tr = CRH(ρ ‖ t1) = CRH(pk) + h.Reset() + _, _ = h.Write(packedPk[:]) + _, _ = h.Read(sk.tr[:]) + + // Finish cache of public key + pk.tr = &sk.tr + + return &pk, &sk +} + +// Computes t0 and t1 from sk.s1h, sk.s2 and sk.A. +func (sk *PrivateKey) computeT0andT1(t0, t1 *VecK) { + var t VecK + + // Set t to A s₁ + s₂ + for i := 0; i < K; i++ { + PolyDotHat(&t[i], &sk.A[i], &sk.s1h) + t[i].ReduceLe2Q() + t[i].InvNTT() + } + t.Add(&t, &sk.s2) + t.Normalize() + + // Compute t₀, t₁ = Power2Round(t) + t.Power2Round(t0, t1) +} + +// Verify checks whether the given signature by pk on msg is valid. +// +// For Dilithium this is the top-level verification function. +// In ML-DSA, this is ML-DSA.Verify_internal. +func Verify(pk *PublicKey, msg func(io.Writer), signature []byte) bool { + var sig unpackedSignature + var mu [64]byte + var zh VecL + var Az, Az2dct1, w1 VecK + var ch common.Poly + var cp [CTildeSize]byte + var w1Packed [PolyW1Size * K]byte + + // Note that Unpack() checked whether ‖z‖_∞ < γ₁ - β + // and ensured that there at most ω ones in pk.hint. + if !sig.Unpack(signature) { + return false + } + + // μ = CRH(tr ‖ msg) + h := sha3.NewShake256() + _, _ = h.Write(pk.tr[:]) + msg(&h) + _, _ = h.Read(mu[:]) + + // Compute Az + zh = sig.z + zh.NTT() + + for i := 0; i < K; i++ { + PolyDotHat(&Az[i], &pk.A[i], &zh) + } + + // Next, we compute Az - 2ᵈ·c·t₁. + // Note that the coefficients of t₁ are bounded by 256 = 2⁹, + // so the coefficients of Az2dct1 will bounded by 2⁹⁺ᵈ = 2²³ < 2q, + // which is small enough for NTT(). + Az2dct1.MulBy2toD(&pk.t1) + Az2dct1.NTT() + PolyDeriveUniformBall(&ch, sig.c[:]) + ch.NTT() + for i := 0; i < K; i++ { + Az2dct1[i].MulHat(&Az2dct1[i], &ch) + } + Az2dct1.Sub(&Az, &Az2dct1) + Az2dct1.ReduceLe2Q() + Az2dct1.InvNTT() + Az2dct1.NormalizeAssumingLe2Q() + + // UseHint(pk.hint, Az - 2ᵈ·c·t₁) + // = UseHint(pk.hint, w - c·s₂ + c·t₀) + // = UseHint(pk.hint, r + c·t₀) + // = r₁ = w₁. + w1.UseHint(&Az2dct1, &sig.hint) + w1.PackW1(w1Packed[:]) + + // c' = H(μ, w₁) + h.Reset() + _, _ = h.Write(mu[:]) + _, _ = h.Write(w1Packed[:]) + _, _ = h.Read(cp[:]) + + return sig.c == cp +} + +// SignTo signs the given message and writes the signature into signature. +// +// For Dilithium this is the top-level signing function. For ML-DSA +// this is ML-DSA.Sign_internal. +// +//nolint:funlen +func SignTo(sk *PrivateKey, msg func(io.Writer), rnd [32]byte, signature []byte) { + var mu, rhop [64]byte + var w1Packed [PolyW1Size * K]byte + var y, yh VecL + var w, w0, w1, w0mcs2, ct0, w0mcs2pct0 VecK + var ch common.Poly + var yNonce uint16 + var sig unpackedSignature + + if len(signature) < SignatureSize { + panic("Signature does not fit in that byteslice") + } + + // μ = CRH(tr ‖ msg) + h := sha3.NewShake256() + _, _ = h.Write(sk.tr[:]) + msg(&h) + _, _ = h.Read(mu[:]) + + // ρ' = CRH(key ‖ μ) + h.Reset() + _, _ = h.Write(sk.key[:]) + if NIST { + _, _ = h.Write(rnd[:]) + } + _, _ = h.Write(mu[:]) + _, _ = h.Read(rhop[:]) + + // Main rejection loop + attempt := 0 + for { + attempt++ + if attempt >= 576 { + // Depending on the mode, one try has a chance between 1/7 and 1/4 + // of succeeding. Thus it is safe to say that 576 iterations + // are enough as (6/7)⁵⁷⁶ < 2⁻¹²⁸. + panic("This should only happen 1 in 2^{128}: something is wrong.") + } + + // y = ExpandMask(ρ', key) + VecLDeriveUniformLeGamma1(&y, &rhop, yNonce) + yNonce += uint16(L) + + // Set w to A y + yh = y + yh.NTT() + for i := 0; i < K; i++ { + PolyDotHat(&w[i], &sk.A[i], &yh) + w[i].ReduceLe2Q() + w[i].InvNTT() + } + + // Decompose w into w₀ and w₁ + w.NormalizeAssumingLe2Q() + w.Decompose(&w0, &w1) + + // c~ = H(μ ‖ w₁) + w1.PackW1(w1Packed[:]) + h.Reset() + _, _ = h.Write(mu[:]) + _, _ = h.Write(w1Packed[:]) + _, _ = h.Read(sig.c[:]) + + PolyDeriveUniformBall(&ch, sig.c[:]) + ch.NTT() + + // Ensure ‖ w₀ - c·s2 ‖_∞ < γ₂ - β. + // + // By Lemma 3 of the specification this is equivalent to checking that + // both ‖ r₀ ‖_∞ < γ₂ - β and r₁ = w₁, for the decomposition + // w - c·s₂ = r₁ α + r₀ as computed by decompose(). + // See also §4.1 of the specification. + for i := 0; i < K; i++ { + w0mcs2[i].MulHat(&ch, &sk.s2h[i]) + w0mcs2[i].InvNTT() + } + w0mcs2.Sub(&w0, &w0mcs2) + w0mcs2.Normalize() + + if w0mcs2.Exceeds(Gamma2 - Beta) { + continue + } + + // z = y + c·s₁ + for i := 0; i < L; i++ { + sig.z[i].MulHat(&ch, &sk.s1h[i]) + sig.z[i].InvNTT() + } + sig.z.Add(&sig.z, &y) + sig.z.Normalize() + + // Ensure ‖z‖_∞ < γ₁ - β + if sig.z.Exceeds(Gamma1 - Beta) { + continue + } + + // Compute c·t₀ + for i := 0; i < K; i++ { + ct0[i].MulHat(&ch, &sk.t0h[i]) + ct0[i].InvNTT() + } + ct0.NormalizeAssumingLe2Q() + + // Ensure ‖c·t₀‖_∞ < γ₂. + if ct0.Exceeds(Gamma2) { + continue + } + + // Create the hint to be able to reconstruct w₁ from w - c·s₂ + c·t0. + // Note that we're not using makeHint() in the obvious way as we + // do not know whether ‖ sc·s₂ - c·t₀ ‖_∞ < γ₂. Instead we note + // that our makeHint() is actually the same as a makeHint for a + // different decomposition: + // + // Earlier we ensured indirectly with a check that r₁ = w₁ where + // r = w - c·s₂. Hence r₀ = r - r₁ α = w - c·s₂ - w₁ α = w₀ - c·s₂. + // Thus MakeHint(w₀ - c·s₂ + c·t₀, w₁) = MakeHint(r0 + c·t₀, r₁) + // and UseHint(w - c·s₂ + c·t₀, w₁) = UseHint(r + c·t₀, r₁). + // As we just ensured that ‖ c·t₀ ‖_∞ < γ₂ our usage is correct. + w0mcs2pct0.Add(&w0mcs2, &ct0) + w0mcs2pct0.NormalizeAssumingLe2Q() + hintPop := sig.hint.MakeHint(&w0mcs2pct0, &w1) + if hintPop > Omega { + continue + } + + break + } + + sig.Pack(signature[:]) +} + +// Computes the public key corresponding to this private key. +func (sk *PrivateKey) Public() *PublicKey { + var t0 VecK + pk := &PublicKey{ + rho: sk.rho, + A: &sk.A, + tr: &sk.tr, + } + sk.computeT0andT1(&t0, &pk.t1) + pk.t1.PackT1(pk.t1p[:]) + return pk +} + +// Equal returns whether the two public keys are equal +func (pk *PublicKey) Equal(other *PublicKey) bool { + return pk.rho == other.rho && pk.t1 == other.t1 +} + +// Equal returns whether the two private keys are equal +func (sk *PrivateKey) Equal(other *PrivateKey) bool { + ret := (subtle.ConstantTimeCompare(sk.rho[:], other.rho[:]) & + subtle.ConstantTimeCompare(sk.key[:], other.key[:]) & + subtle.ConstantTimeCompare(sk.tr[:], other.tr[:])) + + acc := uint32(0) + for i := 0; i < L; i++ { + for j := 0; j < common.N; j++ { + acc |= sk.s1[i][j] ^ other.s1[i][j] + } + } + for i := 0; i < K; i++ { + for j := 0; j < common.N; j++ { + acc |= sk.s2[i][j] ^ other.s2[i][j] + acc |= sk.t0[i][j] ^ other.t0[i][j] + } + } + return (ret & subtle.ConstantTimeEq(int32(acc), 0)) == 1 +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/mat.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/mat.go new file mode 100644 index 0000000..ceaf634 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/mat.go @@ -0,0 +1,59 @@ +// Code generated from mode3/internal/mat.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// A k by l matrix of polynomials. +type Mat [K]VecL + +// Expands the given seed to a complete matrix. +// +// This function is called ExpandA in the specification. +func (m *Mat) Derive(seed *[32]byte) { + if !DeriveX4Available { + for i := uint16(0); i < K; i++ { + for j := uint16(0); j < L; j++ { + PolyDeriveUniform(&m[i][j], seed, (i<<8)+j) + } + } + return + } + + idx := 0 + var nonces [4]uint16 + var ps [4]*common.Poly + for i := uint16(0); i < K; i++ { + for j := uint16(0); j < L; j++ { + nonces[idx] = (i << 8) + j + ps[idx] = &m[i][j] + idx++ + if idx == 4 { + idx = 0 + PolyDeriveUniformX4(ps, seed, nonces) + } + } + } + if idx != 0 { + for i := idx; i < 4; i++ { + ps[i] = nil + } + PolyDeriveUniformX4(ps, seed, nonces) + } +} + +// Set p to the inner product of a and b using pointwise multiplication. +// +// Assumes a and b are in Montgomery form and their coefficients are +// pairwise sufficiently small to multiply, see Poly.MulHat(). Resulting +// coefficients are bounded by 2Lq. +func PolyDotHat(p *common.Poly, a, b *VecL) { + var t common.Poly + *p = common.Poly{} // zero p + for i := 0; i < L; i++ { + t.MulHat(&a[i], &b[i]) + p.Add(&t, p) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/pack.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/pack.go new file mode 100644 index 0000000..1854b41 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/pack.go @@ -0,0 +1,270 @@ +// Code generated from mode3/internal/pack.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// Writes p with norm less than or equal η into buf, which must be of +// size PolyLeqEtaSize. +// +// Assumes coefficients of p are not normalized, but in [q-η,q+η]. +func PolyPackLeqEta(p *common.Poly, buf []byte) { + if DoubleEtaBits == 4 { // compiler eliminates branch + j := 0 + for i := 0; i < PolyLeqEtaSize; i++ { + buf[i] = (byte(common.Q+Eta-p[j]) | + byte(common.Q+Eta-p[j+1])<<4) + j += 2 + } + } else if DoubleEtaBits == 3 { + j := 0 + for i := 0; i < PolyLeqEtaSize; i += 3 { + buf[i] = (byte(common.Q+Eta-p[j]) | + (byte(common.Q+Eta-p[j+1]) << 3) | + (byte(common.Q+Eta-p[j+2]) << 6)) + buf[i+1] = ((byte(common.Q+Eta-p[j+2]) >> 2) | + (byte(common.Q+Eta-p[j+3]) << 1) | + (byte(common.Q+Eta-p[j+4]) << 4) | + (byte(common.Q+Eta-p[j+5]) << 7)) + buf[i+2] = ((byte(common.Q+Eta-p[j+5]) >> 1) | + (byte(common.Q+Eta-p[j+6]) << 2) | + (byte(common.Q+Eta-p[j+7]) << 5)) + j += 8 + } + } else { + panic("eta not supported") + } +} + +// Sets p to the polynomial of norm less than or equal η encoded in the +// given buffer of size PolyLeqEtaSize. +// +// Output coefficients of p are not normalized, but in [q-η,q+η] provided +// buf was created using PackLeqEta. +// +// Beware, for arbitrary buf the coefficients of p might end up in +// the interval [q-2^b,q+2^b] where b is the least b with η≤2^b. +func PolyUnpackLeqEta(p *common.Poly, buf []byte) { + if DoubleEtaBits == 4 { // compiler eliminates branch + j := 0 + for i := 0; i < PolyLeqEtaSize; i++ { + p[j] = common.Q + Eta - uint32(buf[i]&15) + p[j+1] = common.Q + Eta - uint32(buf[i]>>4) + j += 2 + } + } else if DoubleEtaBits == 3 { + j := 0 + for i := 0; i < PolyLeqEtaSize; i += 3 { + p[j] = common.Q + Eta - uint32(buf[i]&7) + p[j+1] = common.Q + Eta - uint32((buf[i]>>3)&7) + p[j+2] = common.Q + Eta - uint32((buf[i]>>6)|((buf[i+1]<<2)&7)) + p[j+3] = common.Q + Eta - uint32((buf[i+1]>>1)&7) + p[j+4] = common.Q + Eta - uint32((buf[i+1]>>4)&7) + p[j+5] = common.Q + Eta - uint32((buf[i+1]>>7)|((buf[i+2]<<1)&7)) + p[j+6] = common.Q + Eta - uint32((buf[i+2]>>2)&7) + p[j+7] = common.Q + Eta - uint32((buf[i+2]>>5)&7) + j += 8 + } + } else { + panic("eta not supported") + } +} + +// Writes v with coefficients in {0, 1} of which at most ω non-zero +// to buf, which must have length ω+k. +func (v *VecK) PackHint(buf []byte) { + // The packed hint starts with the indices of the non-zero coefficients + // For instance: + // + // (x⁵⁶ + x¹⁰⁰, x²⁵⁵, 0, x² + x²³, x¹) + // + // Yields + // + // 56, 100, 255, 2, 23, 1 + // + // Then we pad with zeroes until we have a list of ω items: + // // 56, 100, 255, 2, 23, 1, 0, 0, ..., 0 + // + // Then we finish with a list of the switch-over-indices in this + // list between polynomials, so: + // + // 56, 100, 255, 2, 23, 1, 0, 0, ..., 0, 2, 3, 3, 5, 6 + + off := uint8(0) + for i := 0; i < K; i++ { + for j := uint16(0); j < common.N; j++ { + if v[i][j] != 0 { + buf[off] = uint8(j) + off++ + } + } + buf[Omega+i] = off + } + for ; off < Omega; off++ { + buf[off] = 0 + } +} + +// Sets v to the vector encoded using VecK.PackHint() +// +// Returns whether unpacking was successful. +func (v *VecK) UnpackHint(buf []byte) bool { + // A priori, there would be several reasonable ways to encode the same + // hint vector. We take care to only allow only one encoding, to ensure + // "strong unforgeability". + // + // See PackHint() source for description of the encoding. + *v = VecK{} // zero v + prevSOP := uint8(0) // previous switch-over-point + for i := 0; i < K; i++ { + SOP := buf[Omega+i] + if SOP < prevSOP || SOP > Omega { + return false // ensures switch-over-points are increasing + } + for j := prevSOP; j < SOP; j++ { + if j > prevSOP && buf[j] <= buf[j-1] { + return false // ensures indices are increasing (within a poly) + } + v[i][buf[j]] = 1 + } + prevSOP = SOP + } + for j := prevSOP; j < Omega; j++ { + if buf[j] != 0 { + return false // ensures padding indices are zero + } + } + + return true +} + +// Sets p to the polynomial packed into buf by PolyPackLeGamma1. +// +// p will be normalized. +func PolyUnpackLeGamma1(p *common.Poly, buf []byte) { + if Gamma1Bits == 17 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 9 { + p0 := uint32(buf[i]) | (uint32(buf[i+1]) << 8) | + (uint32(buf[i+2]&0x3) << 16) + p1 := uint32(buf[i+2]>>2) | (uint32(buf[i+3]) << 6) | + (uint32(buf[i+4]&0xf) << 14) + p2 := uint32(buf[i+4]>>4) | (uint32(buf[i+5]) << 4) | + (uint32(buf[i+6]&0x3f) << 12) + p3 := uint32(buf[i+6]>>6) | (uint32(buf[i+7]) << 2) | + (uint32(buf[i+8]) << 10) + + // coefficients in [0,…,2γ₁) + p0 = Gamma1 - p0 // (-γ₁,…,γ₁] + p1 = Gamma1 - p1 + p2 = Gamma1 - p2 + p3 = Gamma1 - p3 + + p0 += uint32(int32(p0)>>31) & common.Q // normalize + p1 += uint32(int32(p1)>>31) & common.Q + p2 += uint32(int32(p2)>>31) & common.Q + p3 += uint32(int32(p3)>>31) & common.Q + + p[j] = p0 + p[j+1] = p1 + p[j+2] = p2 + p[j+3] = p3 + + j += 4 + } + } else if Gamma1Bits == 19 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 5 { + p0 := uint32(buf[i]) | (uint32(buf[i+1]) << 8) | + (uint32(buf[i+2]&0xf) << 16) + p1 := uint32(buf[i+2]>>4) | (uint32(buf[i+3]) << 4) | + (uint32(buf[i+4]) << 12) + + p0 = Gamma1 - p0 + p1 = Gamma1 - p1 + + p0 += uint32(int32(p0)>>31) & common.Q + p1 += uint32(int32(p1)>>31) & common.Q + + p[j] = p0 + p[j+1] = p1 + + j += 2 + } + } else { + panic("γ₁ not supported") + } +} + +// Writes p whose coefficients are in (-γ₁,γ₁] into buf +// which has to be of length PolyLeGamma1Size. +// +// Assumes p is normalized. +func PolyPackLeGamma1(p *common.Poly, buf []byte) { + if Gamma1Bits == 17 { + j := 0 + // coefficients in [0,…,γ₁] ∪ (q-γ₁,…,q) + for i := 0; i < PolyLeGamma1Size; i += 9 { + p0 := Gamma1 - p[j] // [0,…,γ₁] ∪ (γ₁-q,…,2γ₁-q) + p0 += uint32(int32(p0)>>31) & common.Q // [0,…,2γ₁) + p1 := Gamma1 - p[j+1] + p1 += uint32(int32(p1)>>31) & common.Q + p2 := Gamma1 - p[j+2] + p2 += uint32(int32(p2)>>31) & common.Q + p3 := Gamma1 - p[j+3] + p3 += uint32(int32(p3)>>31) & common.Q + + buf[i+0] = byte(p0) + buf[i+1] = byte(p0 >> 8) + buf[i+2] = byte(p0>>16) | byte(p1<<2) + buf[i+3] = byte(p1 >> 6) + buf[i+4] = byte(p1>>14) | byte(p2<<4) + buf[i+5] = byte(p2 >> 4) + buf[i+6] = byte(p2>>12) | byte(p3<<6) + buf[i+7] = byte(p3 >> 2) + buf[i+8] = byte(p3 >> 10) + + j += 4 + } + } else if Gamma1Bits == 19 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 5 { + // Coefficients are in [0, γ₁] ∪ (Q-γ₁, Q) + p0 := Gamma1 - p[j] + p0 += uint32(int32(p0)>>31) & common.Q + p1 := Gamma1 - p[j+1] + p1 += uint32(int32(p1)>>31) & common.Q + + buf[i+0] = byte(p0) + buf[i+1] = byte(p0 >> 8) + buf[i+2] = byte(p0>>16) | byte(p1<<4) + buf[i+3] = byte(p1 >> 4) + buf[i+4] = byte(p1 >> 12) + + j += 2 + } + } else { + panic("γ₁ not supported") + } +} + +// Pack w₁ into buf, which must be of length PolyW1Size. +// +// Assumes w₁ is normalized. +func PolyPackW1(p *common.Poly, buf []byte) { + if Gamma1Bits == 19 { + p.PackLe16(buf) + } else if Gamma1Bits == 17 { + j := 0 + for i := 0; i < PolyW1Size; i += 3 { + buf[i] = byte(p[j]) | byte(p[j+1]<<6) + buf[i+1] = byte(p[j+1]>>2) | byte(p[j+2]<<4) + buf[i+2] = byte(p[j+2]>>4) | byte(p[j+3]<<2) + j += 4 + } + } else { + panic("unsupported γ₁") + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/params.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/params.go new file mode 100644 index 0000000..0485ff0 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/params.go @@ -0,0 +1,18 @@ +// Code generated from params.templ.go. DO NOT EDIT. + +package internal + +const ( + Name = "ML-DSA-44" + K = 4 + L = 4 + Eta = 2 + DoubleEtaBits = 3 + Omega = 80 + Tau = 39 + Gamma1Bits = 17 + Gamma2 = 95232 + NIST = true + TRSize = 64 + CTildeSize = 32 +) diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/rounding.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/rounding.go new file mode 100644 index 0000000..58123c0 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/rounding.go @@ -0,0 +1,142 @@ +// Code generated from mode3/internal/rounding.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// Splits 0 ≤ a < q into a₀ and a₁ with a = a₁*α + a₀ with -α/2 < a₀ ≤ α/2, +// except for when we would have a₁ = (q-1)/α in which case a₁=0 is taken +// and -α/2 ≤ a₀ < 0. Returns a₀ + q. Note 0 ≤ a₁ < (q-1)/α. +// Recall α = 2γ₂. +func decompose(a uint32) (a0plusQ, a1 uint32) { + // a₁ = ⌈a / 128⌉ + a1 = (a + 127) >> 7 + + if Alpha == 523776 { + // 1025/2²² is close enough to 1/4092 so that a₁ + // becomes a/α rounded down. + a1 = ((a1*1025 + (1 << 21)) >> 22) + + // For the corner-case a₁ = (q-1)/α = 16, we have to set a₁=0. + a1 &= 15 + } else if Alpha == 190464 { + // 1488/2²⁴ is close enough to 1/1488 so that a₁ + // becomes a/α rounded down. + a1 = ((a1 * 11275) + (1 << 23)) >> 24 + + // For the corner-case a₁ = (q-1)/α = 44, we have to set a₁=0. + a1 ^= uint32(int32(43-a1)>>31) & a1 + } else { + panic("unsupported α") + } + + a0plusQ = a - a1*Alpha + + // In the corner-case, when we set a₁=0, we will incorrectly + // have a₀ > (q-1)/2 and we'll need to subtract q. As we + // return a₀ + q, that comes down to adding q if a₀ < (q-1)/2. + a0plusQ += uint32(int32(a0plusQ-(common.Q-1)/2)>>31) & common.Q + + return +} + +// Assume 0 ≤ r, f < Q with ‖f‖_∞ ≤ α/2. Decompose r as r = r1*α + r0 as +// computed by decompose(). Write r' := r - f (mod Q). Now, decompose +// r'=r-f again as r' = r'1*α + r'0 using decompose(). As f is small, we +// have r'1 = r1 + h, where h ∈ {-1, 0, 1}. makeHint() computes |h| +// given z0 := r0 - f (mod Q) and r1. With |h|, which is called the hint, +// we can reconstruct r1 using only r' = r - f, which is done by useHint(). +// To wit: +// +// useHint( r - f, makeHint( r0 - f, r1 ) ) = r1. +// +// Assumes 0 ≤ z0 < Q. +func makeHint(z0, r1 uint32) uint32 { + // If -α/2 < r0 - f ≤ α/2, then r1*α + r0 - f is a valid decomposition of r' + // with the restrictions of decompose() and so r'1 = r1. So the hint + // should be 0. This is covered by the first two inequalities. + // There is one other case: if r0 - f = -α/2, then r1*α + r0 - f is also + // a valid decomposition if r1 = 0. In the other cases a one is carried + // and the hint should be 1. + if z0 <= Gamma2 || z0 > common.Q-Gamma2 || (z0 == common.Q-Gamma2 && r1 == 0) { + return 0 + } + return 1 +} + +// Uses the hint created by makeHint() to reconstruct r1 from r'=r-f; see +// documentation of makeHint() for context. +// Assumes 0 ≤ r' < Q. +func useHint(rp uint32, hint uint32) uint32 { + rp0plusQ, rp1 := decompose(rp) + if hint == 0 { + return rp1 + } + if rp0plusQ > common.Q { + return (rp1 + 1) & 15 + } + return (rp1 - 1) & 15 +} + +// Sets p to the hint polynomial for p0 the modified low bits and p1 +// the unmodified high bits --- see makeHint(). +// +// Returns the number of ones in the hint polynomial. +func PolyMakeHint(p, p0, p1 *common.Poly) (pop uint32) { + for i := 0; i < common.N; i++ { + h := makeHint(p0[i], p1[i]) + pop += h + p[i] = h + } + return +} + +// Computes corrections to the high bits of the polynomial q according +// to the hints in h and sets p to the corrected high bits. Returns p. +func PolyUseHint(p, q, hint *common.Poly) { + var q0PlusQ common.Poly + + // See useHint() and makeHint() for an explanation. We reimplement it + // here so that we can call Poly.Decompose(), which might be way faster + // than calling decompose() in a loop (for instance when having AVX2.) + + PolyDecompose(q, &q0PlusQ, p) + + for i := 0; i < common.N; i++ { + if hint[i] == 0 { + continue + } + if Gamma2 == 261888 { + if q0PlusQ[i] > common.Q { + p[i] = (p[i] + 1) & 15 + } else { + p[i] = (p[i] - 1) & 15 + } + } else if Gamma2 == 95232 { + if q0PlusQ[i] > common.Q { + if p[i] == 43 { + p[i] = 0 + } else { + p[i]++ + } + } else { + if p[i] == 0 { + p[i] = 43 + } else { + p[i]-- + } + } + } else { + panic("unsupported γ₂") + } + } +} + +// Splits each of the coefficients of p using decompose. +func PolyDecompose(p, p0PlusQ, p1 *common.Poly) { + for i := 0; i < common.N; i++ { + p0PlusQ[i], p1[i] = decompose(p[i]) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/sample.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/sample.go new file mode 100644 index 0000000..b37370a --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/sample.go @@ -0,0 +1,339 @@ +// Code generated from mode3/internal/sample.go by gen.go + +package internal + +import ( + "encoding/binary" + + "github.com/cloudflare/circl/internal/sha3" + common "github.com/cloudflare/circl/sign/internal/dilithium" + "github.com/cloudflare/circl/simd/keccakf1600" +) + +// DeriveX4Available indicates whether the system supports the quick fourway +// sampling variants like PolyDeriveUniformX4. +var DeriveX4Available = keccakf1600.IsEnabledX4() + +// For each i, sample ps[i] uniformly from the given seed and nonces[i]. +// ps[i] may be nil and is ignored in that case. +// +// Can only be called when DeriveX4Available is true. +func PolyDeriveUniformX4(ps [4]*common.Poly, seed *[32]byte, nonces [4]uint16) { + var perm keccakf1600.StateX4 + state := perm.Initialize(false) + + // Absorb the seed in the four states + for i := 0; i < 4; i++ { + v := binary.LittleEndian.Uint64(seed[8*i : 8*(i+1)]) + for j := 0; j < 4; j++ { + state[i*4+j] = v + } + } + + // Absorb the nonces, the SHAKE128 domain separator (0b1111), the + // start of the padding (0b...001) and the end of the padding 0b100... + // Recall that the rate of SHAKE128 is 168 --- i.e. 21 uint64s. + for j := 0; j < 4; j++ { + state[4*4+j] = uint64(nonces[j]) | (0x1f << 16) + state[20*4+j] = 0x80 << 56 + } + + var idx [4]int // indices into ps + for j := 0; j < 4; j++ { + if ps[j] == nil { + idx[j] = common.N // mark nil polynomial as completed + } + } + + done := false + for !done { + // Applies KeccaK-f[1600] to state to get the next 21 uint64s of each + // of the four SHAKE128 streams. + perm.Permute() + + done = true + + PolyLoop: + for j := 0; j < 4; j++ { + if idx[j] == common.N { + continue + } + for i := 0; i < 7; i++ { + var t [8]uint32 + t[0] = uint32(state[i*3*4+j] & 0x7fffff) + t[1] = uint32((state[i*3*4+j] >> 24) & 0x7fffff) + t[2] = uint32((state[i*3*4+j] >> 48) | + ((state[(i*3+1)*4+j] & 0x7f) << 16)) + t[3] = uint32((state[(i*3+1)*4+j] >> 8) & 0x7fffff) + t[4] = uint32((state[(i*3+1)*4+j] >> 32) & 0x7fffff) + t[5] = uint32((state[(i*3+1)*4+j] >> 56) | + ((state[(i*3+2)*4+j] & 0x7fff) << 8)) + t[6] = uint32((state[(i*3+2)*4+j] >> 16) & 0x7fffff) + t[7] = uint32((state[(i*3+2)*4+j] >> 40) & 0x7fffff) + + for k := 0; k < 8; k++ { + if t[k] < common.Q { + ps[j][idx[j]] = t[k] + idx[j]++ + if idx[j] == common.N { + continue PolyLoop + } + } + } + } + done = false + } + } +} + +// Sample p uniformly from the given seed and nonce. +// +// p will be normalized. +func PolyDeriveUniform(p *common.Poly, seed *[32]byte, nonce uint16) { + var i, length int + var buf [12 * 16]byte // fits 168B SHAKE-128 rate + + length = 168 + + sample := func() { + // Note that 3 divides into 168 and 12*16, so we use up buf completely. + for j := 0; j < length && i < common.N; j += 3 { + t := (uint32(buf[j]) | (uint32(buf[j+1]) << 8) | + (uint32(buf[j+2]) << 16)) & 0x7fffff + + // We use rejection sampling + if t < common.Q { + p[i] = t + i++ + } + } + } + + var iv [32 + 2]byte // 32 byte seed + uint16 nonce + h := sha3.NewShake128() + copy(iv[:32], seed[:]) + iv[32] = uint8(nonce) + iv[33] = uint8(nonce >> 8) + _, _ = h.Write(iv[:]) + + for i < common.N { + _, _ = h.Read(buf[:168]) + sample() + } +} + +// Sample p uniformly with coefficients of norm less than or equal η, +// using the given seed and nonce. +// +// p will not be normalized, but will have coefficients in [q-η,q+η]. +func PolyDeriveUniformLeqEta(p *common.Poly, seed *[64]byte, nonce uint16) { + // Assumes 2 < η < 8. + var i, length int + var buf [9 * 16]byte // fits 136B SHAKE-256 rate + + length = 136 + + sample := func() { + // We use rejection sampling + for j := 0; j < length && i < common.N; j++ { + t1 := uint32(buf[j]) & 15 + t2 := uint32(buf[j]) >> 4 + if Eta == 2 { // branch is eliminated by compiler + if t1 <= 14 { + t1 -= ((205 * t1) >> 10) * 5 // reduce mod 5 + p[i] = common.Q + Eta - t1 + i++ + } + if t2 <= 14 && i < common.N { + t2 -= ((205 * t2) >> 10) * 5 // reduce mod 5 + p[i] = common.Q + Eta - t2 + i++ + } + } else if Eta == 4 { + if t1 <= 2*Eta { + p[i] = common.Q + Eta - t1 + i++ + } + if t2 <= 2*Eta && i < common.N { + p[i] = common.Q + Eta - t2 + i++ + } + } else { + panic("unsupported η") + } + } + } + + var iv [64 + 2]byte // 64 byte seed + uint16 nonce + + h := sha3.NewShake256() + copy(iv[:64], seed[:]) + iv[64] = uint8(nonce) + iv[65] = uint8(nonce >> 8) + + // 136 is SHAKE-256 rate + _, _ = h.Write(iv[:]) + + for i < common.N { + _, _ = h.Read(buf[:136]) + sample() + } +} + +// Sample v[i] uniformly with coefficients in (-γ₁,…,γ₁] using the +// given seed and nonce+i +// +// p will be normalized. +func VecLDeriveUniformLeGamma1(v *VecL, seed *[64]byte, nonce uint16) { + for i := 0; i < L; i++ { + PolyDeriveUniformLeGamma1(&v[i], seed, nonce+uint16(i)) + } +} + +// Sample p uniformly with coefficients in (-γ₁,…,γK1s] using the +// given seed and nonce. +// +// p will be normalized. +func PolyDeriveUniformLeGamma1(p *common.Poly, seed *[64]byte, nonce uint16) { + var buf [PolyLeGamma1Size]byte + + var iv [66]byte + h := sha3.NewShake256() + copy(iv[:64], seed[:]) + iv[64] = uint8(nonce) + iv[65] = uint8(nonce >> 8) + _, _ = h.Write(iv[:]) + _, _ = h.Read(buf[:]) + + PolyUnpackLeGamma1(p, buf[:]) +} + +// For each i, sample ps[i] uniformly with τ non-zero coefficients in {q-1,1} +// using the given seed and w1[i]. ps[i] may be nil and is ignored +// in that case. ps[i] will be normalized. +// +// Can only be called when DeriveX4Available is true. +// +// This function is currently not used (yet). +func PolyDeriveUniformBallX4(ps [4]*common.Poly, seed []byte) { + var perm keccakf1600.StateX4 + state := perm.Initialize(false) + + // Absorb the seed in the four states + for i := 0; i < CTildeSize/8; i++ { + v := binary.LittleEndian.Uint64(seed[8*i : 8*(i+1)]) + for j := 0; j < 4; j++ { + state[i*4+j] = v + } + } + + // SHAKE256 domain separator and padding + for j := 0; j < 4; j++ { + state[(CTildeSize/8)*4+j] ^= 0x1f + state[16*4+j] ^= 0x80 << 56 + } + perm.Permute() + + var signs [4]uint64 + var idx [4]uint16 // indices into ps + + for j := 0; j < 4; j++ { + if ps[j] != nil { + signs[j] = state[j] + *ps[j] = common.Poly{} // zero ps[j] + idx[j] = common.N - Tau + } else { + idx[j] = common.N // mark as completed + } + } + + stateOffset := 1 + for { + done := true + + PolyLoop: + for j := 0; j < 4; j++ { + if idx[j] == common.N { + continue + } + + for i := stateOffset; i < 17; i++ { + var bs [8]byte + binary.LittleEndian.PutUint64(bs[:], state[4*i+j]) + for k := 0; k < 8; k++ { + b := uint16(bs[k]) + + if b > idx[j] { + continue + } + + ps[j][idx[j]] = ps[j][b] + ps[j][b] = 1 + // Takes least significant bit of signs and uses it for the sign. + // Note 1 ^ (1 | (Q-1)) = Q-1. + ps[j][b] ^= uint32((-(signs[j] & 1)) & (1 | (common.Q - 1))) + signs[j] >>= 1 + + idx[j]++ + if idx[j] == common.N { + continue PolyLoop + } + } + } + + done = false + } + + if done { + break + } + + perm.Permute() + stateOffset = 0 + } +} + +// Samples p uniformly with τ non-zero coefficients in {q-1,1}. +// +// The polynomial p will be normalized. +func PolyDeriveUniformBall(p *common.Poly, seed []byte) { + var buf [136]byte // SHAKE-256 rate is 136 + + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + _, _ = h.Read(buf[:]) + + // Essentially we generate a sequence of τ ones or minus ones, + // prepend 196 zeroes and shuffle the concatenation using the + // usual algorithm (Fisher--Yates.) + signs := binary.LittleEndian.Uint64(buf[:]) + bufOff := 8 // offset into buf + + *p = common.Poly{} // zero p + for i := uint16(common.N - Tau); i < common.N; i++ { + var b uint16 + + // Find location of where to move the new coefficient to using + // rejection sampling. + for { + if bufOff >= 136 { + _, _ = h.Read(buf[:]) + bufOff = 0 + } + + b = uint16(buf[bufOff]) + bufOff++ + + if b <= i { + break + } + } + + p[i] = p[b] + p[b] = 1 + // Takes least significant bit of signs and uses it for the sign. + // Note 1 ^ (1 | (Q-1)) = Q-1. + p[b] ^= uint32((-(signs & 1)) & (1 | (common.Q - 1))) + signs >>= 1 + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/vec.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/vec.go new file mode 100644 index 0000000..d07d3b2 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa44/internal/vec.go @@ -0,0 +1,281 @@ +// Code generated from mode3/internal/vec.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// A vector of L polynomials. +type VecL [L]common.Poly + +// A vector of K polynomials. +type VecK [K]common.Poly + +// Normalize the polynomials in this vector. +func (v *VecL) Normalize() { + for i := 0; i < L; i++ { + v[i].Normalize() + } +} + +// Normalize the polynomials in this vector assuming their coefficients +// are already bounded by 2q. +func (v *VecL) NormalizeAssumingLe2Q() { + for i := 0; i < L; i++ { + v[i].NormalizeAssumingLe2Q() + } +} + +// Sets v to w + u. Does not normalize. +func (v *VecL) Add(w, u *VecL) { + for i := 0; i < L; i++ { + v[i].Add(&w[i], &u[i]) + } +} + +// Applies NTT componentwise. See Poly.NTT() for details. +func (v *VecL) NTT() { + for i := 0; i < L; i++ { + v[i].NTT() + } +} + +// Checks whether any of the coefficients exceeds the given bound in supnorm +// +// Requires the vector to be normalized. +func (v *VecL) Exceeds(bound uint32) bool { + for i := 0; i < L; i++ { + if v[i].Exceeds(bound) { + return true + } + } + return false +} + +// Applies Poly.Power2Round componentwise. +// +// Requires the vector to be normalized. +func (v *VecL) Power2Round(v0PlusQ, v1 *VecL) { + for i := 0; i < L; i++ { + v[i].Power2Round(&v0PlusQ[i], &v1[i]) + } +} + +// Applies Poly.Decompose componentwise. +// +// Requires the vector to be normalized. +func (v *VecL) Decompose(v0PlusQ, v1 *VecL) { + for i := 0; i < L; i++ { + PolyDecompose(&v[i], &v0PlusQ[i], &v1[i]) + } +} + +// Sequentially packs each polynomial using Poly.PackLeqEta(). +func (v *VecL) PackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyPackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sets v to the polynomials packed in buf using VecL.PackLeqEta(). +func (v *VecL) UnpackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyUnpackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sequentially packs each polynomial using PolyPackLeGamma1(). +func (v *VecL) PackLeGamma1(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyPackLeGamma1(&v[i], buf[offset:]) + offset += PolyLeGamma1Size + } +} + +// Sets v to the polynomials packed in buf using VecL.PackLeGamma1(). +func (v *VecL) UnpackLeGamma1(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyUnpackLeGamma1(&v[i], buf[offset:]) + offset += PolyLeGamma1Size + } +} + +// Normalize the polynomials in this vector. +func (v *VecK) Normalize() { + for i := 0; i < K; i++ { + v[i].Normalize() + } +} + +// Normalize the polynomials in this vector assuming their coefficients +// are already bounded by 2q. +func (v *VecK) NormalizeAssumingLe2Q() { + for i := 0; i < K; i++ { + v[i].NormalizeAssumingLe2Q() + } +} + +// Sets v to w + u. Does not normalize. +func (v *VecK) Add(w, u *VecK) { + for i := 0; i < K; i++ { + v[i].Add(&w[i], &u[i]) + } +} + +// Checks whether any of the coefficients exceeds the given bound in supnorm +// +// Requires the vector to be normalized. +func (v *VecK) Exceeds(bound uint32) bool { + for i := 0; i < K; i++ { + if v[i].Exceeds(bound) { + return true + } + } + return false +} + +// Applies Poly.Power2Round componentwise. +// +// Requires the vector to be normalized. +func (v *VecK) Power2Round(v0PlusQ, v1 *VecK) { + for i := 0; i < K; i++ { + v[i].Power2Round(&v0PlusQ[i], &v1[i]) + } +} + +// Applies Poly.Decompose componentwise. +// +// Requires the vector to be normalized. +func (v *VecK) Decompose(v0PlusQ, v1 *VecK) { + for i := 0; i < K; i++ { + PolyDecompose(&v[i], &v0PlusQ[i], &v1[i]) + } +} + +// Sets v to the hint vector for v0 the modified low bits and v1 +// the unmodified high bits --- see makeHint(). +// +// Returns the number of ones in the hint vector. +func (v *VecK) MakeHint(v0, v1 *VecK) (pop uint32) { + for i := 0; i < K; i++ { + pop += PolyMakeHint(&v[i], &v0[i], &v1[i]) + } + return +} + +// Computes corrections to the high bits of the polynomials in the vector +// w using the hints in h and sets v to the corrected high bits. Returns v. +// See useHint(). +func (v *VecK) UseHint(q, hint *VecK) *VecK { + for i := 0; i < K; i++ { + PolyUseHint(&v[i], &q[i], &hint[i]) + } + return v +} + +// Sequentially packs each polynomial using Poly.PackT1(). +func (v *VecK) PackT1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].PackT1(buf[offset:]) + offset += common.PolyT1Size + } +} + +// Sets v to the vector packed into buf by PackT1(). +func (v *VecK) UnpackT1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].UnpackT1(buf[offset:]) + offset += common.PolyT1Size + } +} + +// Sequentially packs each polynomial using Poly.PackT0(). +func (v *VecK) PackT0(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].PackT0(buf[offset:]) + offset += common.PolyT0Size + } +} + +// Sets v to the vector packed into buf by PackT0(). +func (v *VecK) UnpackT0(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].UnpackT0(buf[offset:]) + offset += common.PolyT0Size + } +} + +// Sequentially packs each polynomial using Poly.PackLeqEta(). +func (v *VecK) PackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyPackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sets v to the polynomials packed in buf using VecK.PackLeqEta(). +func (v *VecK) UnpackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyUnpackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Applies NTT componentwise. See Poly.NTT() for details. +func (v *VecK) NTT() { + for i := 0; i < K; i++ { + v[i].NTT() + } +} + +// Sequentially packs each polynomial using PolyPackW1(). +func (v *VecK) PackW1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyPackW1(&v[i], buf[offset:]) + offset += PolyW1Size + } +} + +// Sets v to a - b. +// +// Warning: assumes coefficients of the polynomials of b are less than 2q. +func (v *VecK) Sub(a, b *VecK) { + for i := 0; i < K; i++ { + v[i].Sub(&a[i], &b[i]) + } +} + +// Sets v to 2ᵈ w without reducing. +func (v *VecK) MulBy2toD(w *VecK) { + for i := 0; i < K; i++ { + v[i].MulBy2toD(&w[i]) + } +} + +// Applies InvNTT componentwise. See Poly.InvNTT() for details. +func (v *VecK) InvNTT() { + for i := 0; i < K; i++ { + v[i].InvNTT() + } +} + +// Applies Poly.ReduceLe2Q() componentwise. +func (v *VecK) ReduceLe2Q() { + for i := 0; i < K; i++ { + v[i].ReduceLe2Q() + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/dilithium.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/dilithium.go new file mode 100644 index 0000000..23a7b9a --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/dilithium.go @@ -0,0 +1,361 @@ +// Code generated from pkg.templ.go. DO NOT EDIT. + +// mldsa65 implements NIST signature scheme ML-DSA-65 as defined in FIPS204. +package mldsa65 + +import ( + "crypto" + cryptoRand "crypto/rand" + "encoding/asn1" + "errors" + "io" + + "github.com/cloudflare/circl/sign" + common "github.com/cloudflare/circl/sign/internal/dilithium" + "github.com/cloudflare/circl/sign/mldsa/mldsa65/internal" +) + +const ( + // Size of seed for NewKeyFromSeed + SeedSize = common.SeedSize + + // Size of a packed PublicKey + PublicKeySize = internal.PublicKeySize + + // Size of a packed PrivateKey + PrivateKeySize = internal.PrivateKeySize + + // Size of a signature + SignatureSize = internal.SignatureSize +) + +// PublicKey is the type of ML-DSA-65 public key +type PublicKey internal.PublicKey + +// PrivateKey is the type of ML-DSA-65 private key +type PrivateKey internal.PrivateKey + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error) { + pk, sk, err := internal.GenerateKey(rand) + return (*PublicKey)(pk), (*PrivateKey)(sk), err +} + +// NewKeyFromSeed derives a public/private key pair using the given seed. +func NewKeyFromSeed(seed *[SeedSize]byte) (*PublicKey, *PrivateKey) { + pk, sk := internal.NewKeyFromSeed(seed) + return (*PublicKey)(pk), (*PrivateKey)(sk) +} + +// SignTo signs the given message and writes the signature into signature. +// It will panic if signature is not of length at least SignatureSize. +// +// ctx is the optional context string. Errors if ctx is larger than 255 bytes. +// A nil context string is equivalent to an empty context string. +func SignTo(sk *PrivateKey, msg, ctx []byte, randomized bool, sig []byte) error { + var rnd [32]byte + if randomized { + _, err := cryptoRand.Read(rnd[:]) + if err != nil { + return err + } + } + + if len(ctx) > 255 { + return sign.ErrContextTooLong + } + + internal.SignTo( + (*internal.PrivateKey)(sk), + func(w io.Writer) { + _, _ = w.Write([]byte{0}) + _, _ = w.Write([]byte{byte(len(ctx))}) + + if ctx != nil { + _, _ = w.Write(ctx) + } + w.Write(msg) + }, + rnd, + sig, + ) + return nil +} + +// Do not use. Implements ML-DSA.Sign_internal used for compatibility tests. +func (sk *PrivateKey) unsafeSignInternal(msg []byte, rnd [32]byte) []byte { + var ret [SignatureSize]byte + internal.SignTo( + (*internal.PrivateKey)(sk), + func(w io.Writer) { + _, _ = w.Write(msg) + }, + rnd, + ret[:], + ) + return ret[:] +} + +// Do not use. Implements ML-DSA.Verify_internal used for compatibility tests. +func unsafeVerifyInternal(pk *PublicKey, msg, sig []byte) bool { + return internal.Verify( + (*internal.PublicKey)(pk), + func(w io.Writer) { + _, _ = w.Write(msg) + }, + sig, + ) +} + +// Verify checks whether the given signature by pk on msg is valid. +// +// ctx is the optional context string. Fails if ctx is larger than 255 bytes. +// A nil context string is equivalent to an empty context string. +func Verify(pk *PublicKey, msg, ctx, sig []byte) bool { + if len(ctx) > 255 { + return false + } + return internal.Verify( + (*internal.PublicKey)(pk), + func(w io.Writer) { + _, _ = w.Write([]byte{0}) + _, _ = w.Write([]byte{byte(len(ctx))}) + + if ctx != nil { + _, _ = w.Write(ctx) + } + _, _ = w.Write(msg) + }, + sig, + ) +} + +// Sets pk to the public key encoded in buf. +func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte) { + (*internal.PublicKey)(pk).Unpack(buf) +} + +// Sets sk to the private key encoded in buf. +func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte) { + (*internal.PrivateKey)(sk).Unpack(buf) +} + +// Packs the public key into buf. +func (pk *PublicKey) Pack(buf *[PublicKeySize]byte) { + (*internal.PublicKey)(pk).Pack(buf) +} + +// Packs the private key into buf. +func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte) { + (*internal.PrivateKey)(sk).Pack(buf) +} + +// Packs the public key. +func (pk *PublicKey) Bytes() []byte { + var buf [PublicKeySize]byte + pk.Pack(&buf) + return buf[:] +} + +// Packs the private key. +func (sk *PrivateKey) Bytes() []byte { + var buf [PrivateKeySize]byte + sk.Pack(&buf) + return buf[:] +} + +// Packs the public key. +func (pk *PublicKey) MarshalBinary() ([]byte, error) { + return pk.Bytes(), nil +} + +// Packs the private key. +func (sk *PrivateKey) MarshalBinary() ([]byte, error) { + return sk.Bytes(), nil +} + +// Unpacks the public key from data. +func (pk *PublicKey) UnmarshalBinary(data []byte) error { + if len(data) != PublicKeySize { + return errors.New("packed public key must be of mldsa65.PublicKeySize bytes") + } + var buf [PublicKeySize]byte + copy(buf[:], data) + pk.Unpack(&buf) + return nil +} + +// Unpacks the private key from data. +func (sk *PrivateKey) UnmarshalBinary(data []byte) error { + if len(data) != PrivateKeySize { + return errors.New("packed private key must be of mldsa65.PrivateKeySize bytes") + } + var buf [PrivateKeySize]byte + copy(buf[:], data) + sk.Unpack(&buf) + return nil +} + +// Sign signs the given message. +// +// opts.HashFunc() must return zero, which can be achieved by passing +// crypto.Hash(0) for opts. rand is ignored. Will only return an error +// if opts.HashFunc() is non-zero. +// +// This function is used to make PrivateKey implement the crypto.Signer +// interface. The package-level SignTo function might be more convenient +// to use. +func (sk *PrivateKey) Sign(rand io.Reader, msg []byte, opts crypto.SignerOpts) ( + sig []byte, err error) { + var ret [SignatureSize]byte + + if opts.HashFunc() != crypto.Hash(0) { + return nil, errors.New("dilithium: cannot sign hashed message") + } + if err = SignTo(sk, msg, nil, false, ret[:]); err != nil { + return nil, err + } + + return ret[:], nil +} + +// Computes the public key corresponding to this private key. +// +// Returns a *PublicKey. The type crypto.PublicKey is used to make +// PrivateKey implement the crypto.Signer interface. +func (sk *PrivateKey) Public() crypto.PublicKey { + return (*PublicKey)((*internal.PrivateKey)(sk).Public()) +} + +// Equal returns whether the two private keys equal. +func (sk *PrivateKey) Equal(other crypto.PrivateKey) bool { + castOther, ok := other.(*PrivateKey) + if !ok { + return false + } + return (*internal.PrivateKey)(sk).Equal((*internal.PrivateKey)(castOther)) +} + +// Equal returns whether the two public keys equal. +func (pk *PublicKey) Equal(other crypto.PublicKey) bool { + castOther, ok := other.(*PublicKey) + if !ok { + return false + } + return (*internal.PublicKey)(pk).Equal((*internal.PublicKey)(castOther)) +} + +// Boilerplate for generic signatures API + +type scheme struct{} + +var sch sign.Scheme = &scheme{} + +// Scheme returns a generic signature interface for ML-DSA-65. +func Scheme() sign.Scheme { return sch } + +func (*scheme) Name() string { return "ML-DSA-65" } +func (*scheme) PublicKeySize() int { return PublicKeySize } +func (*scheme) PrivateKeySize() int { return PrivateKeySize } +func (*scheme) SignatureSize() int { return SignatureSize } +func (*scheme) SeedSize() int { return SeedSize } + +// TODO TLSIdentifier() +func (*scheme) Oid() asn1.ObjectIdentifier { + return asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 18} +} + +func (*scheme) SupportsContext() bool { + return true +} + +func (*scheme) GenerateKey() (sign.PublicKey, sign.PrivateKey, error) { + return GenerateKey(nil) +} + +func (*scheme) Sign( + sk sign.PrivateKey, + msg []byte, + opts *sign.SignatureOpts, +) []byte { + var ctx []byte + sig := make([]byte, SignatureSize) + + priv, ok := sk.(*PrivateKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + ctx = []byte(opts.Context) + } + err := SignTo(priv, msg, ctx, false, sig) + if err != nil { + panic(err) + } + + return sig +} + +func (*scheme) Verify( + pk sign.PublicKey, + msg, sig []byte, + opts *sign.SignatureOpts, +) bool { + var ctx []byte + pub, ok := pk.(*PublicKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + ctx = []byte(opts.Context) + } + return Verify(pub, msg, ctx, sig) +} + +func (*scheme) DeriveKey(seed []byte) (sign.PublicKey, sign.PrivateKey) { + if len(seed) != SeedSize { + panic(sign.ErrSeedSize) + } + var seed2 [SeedSize]byte + copy(seed2[:], seed) + return NewKeyFromSeed(&seed2) +} + +func (*scheme) UnmarshalBinaryPublicKey(buf []byte) (sign.PublicKey, error) { + if len(buf) != PublicKeySize { + return nil, sign.ErrPubKeySize + } + + var ( + buf2 [PublicKeySize]byte + ret PublicKey + ) + + copy(buf2[:], buf) + ret.Unpack(&buf2) + return &ret, nil +} + +func (*scheme) UnmarshalBinaryPrivateKey(buf []byte) (sign.PrivateKey, error) { + if len(buf) != PrivateKeySize { + return nil, sign.ErrPrivKeySize + } + + var ( + buf2 [PrivateKeySize]byte + ret PrivateKey + ) + + copy(buf2[:], buf) + ret.Unpack(&buf2) + return &ret, nil +} + +func (sk *PrivateKey) Scheme() sign.Scheme { + return sch +} + +func (sk *PublicKey) Scheme() sign.Scheme { + return sch +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/dilithium.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/dilithium.go new file mode 100644 index 0000000..8f1c8e5 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/dilithium.go @@ -0,0 +1,491 @@ +// Code generated from mode3/internal/dilithium.go by gen.go + +package internal + +import ( + cryptoRand "crypto/rand" + "crypto/subtle" + "io" + + "github.com/cloudflare/circl/internal/sha3" + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +const ( + // Size of a packed polynomial of norm ≤η. + // (Note that the formula is not valid in general.) + PolyLeqEtaSize = (common.N * DoubleEtaBits) / 8 + + // β = τη, the maximum size of c s₂. + Beta = Tau * Eta + + // γ₁ range of y + Gamma1 = 1 << Gamma1Bits + + // Size of packed polynomial of norm <γ₁ such as z + PolyLeGamma1Size = (Gamma1Bits + 1) * common.N / 8 + + // α = 2γ₂ parameter for decompose + Alpha = 2 * Gamma2 + + // Size of a packed private key + PrivateKeySize = 32 + 32 + TRSize + PolyLeqEtaSize*(L+K) + common.PolyT0Size*K + + // Size of a packed public key + PublicKeySize = 32 + common.PolyT1Size*K + + // Size of a packed signature + SignatureSize = L*PolyLeGamma1Size + Omega + K + CTildeSize + + // Size of packed w₁ + PolyW1Size = (common.N * (common.QBits - Gamma1Bits)) / 8 +) + +// PublicKey is the type of Dilithium public keys. +type PublicKey struct { + rho [32]byte + t1 VecK + + // Cached values + t1p [common.PolyT1Size * K]byte + A *Mat + tr *[TRSize]byte +} + +// PrivateKey is the type of Dilithium private keys. +type PrivateKey struct { + rho [32]byte + key [32]byte + s1 VecL + s2 VecK + t0 VecK + tr [TRSize]byte + + // Cached values + A Mat // ExpandA(ρ) + s1h VecL // NTT(s₁) + s2h VecK // NTT(s₂) + t0h VecK // NTT(t₀) +} + +type unpackedSignature struct { + z VecL + hint VecK + c [CTildeSize]byte +} + +// Packs the signature into buf. +func (sig *unpackedSignature) Pack(buf []byte) { + copy(buf[:], sig.c[:]) + sig.z.PackLeGamma1(buf[CTildeSize:]) + sig.hint.PackHint(buf[CTildeSize+L*PolyLeGamma1Size:]) +} + +// Sets sig to the signature encoded in the buffer. +// +// Returns whether buf contains a properly packed signature. +func (sig *unpackedSignature) Unpack(buf []byte) bool { + if len(buf) < SignatureSize { + return false + } + copy(sig.c[:], buf[:]) + sig.z.UnpackLeGamma1(buf[CTildeSize:]) + if sig.z.Exceeds(Gamma1 - Beta) { + return false + } + if !sig.hint.UnpackHint(buf[CTildeSize+L*PolyLeGamma1Size:]) { + return false + } + return true +} + +// Packs the public key into buf. +func (pk *PublicKey) Pack(buf *[PublicKeySize]byte) { + copy(buf[:32], pk.rho[:]) + copy(buf[32:], pk.t1p[:]) +} + +// Sets pk to the public key encoded in buf. +func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte) { + copy(pk.rho[:], buf[:32]) + copy(pk.t1p[:], buf[32:]) + + pk.t1.UnpackT1(pk.t1p[:]) + pk.A = new(Mat) + pk.A.Derive(&pk.rho) + + // tr = CRH(ρ ‖ t1) = CRH(pk) + pk.tr = new([TRSize]byte) + h := sha3.NewShake256() + _, _ = h.Write(buf[:]) + _, _ = h.Read(pk.tr[:]) +} + +// Packs the private key into buf. +func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte) { + copy(buf[:32], sk.rho[:]) + copy(buf[32:64], sk.key[:]) + copy(buf[64:64+TRSize], sk.tr[:]) + offset := 64 + TRSize + sk.s1.PackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * L + sk.s2.PackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * K + sk.t0.PackT0(buf[offset:]) +} + +// Sets sk to the private key encoded in buf. +func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte) { + copy(sk.rho[:], buf[:32]) + copy(sk.key[:], buf[32:64]) + copy(sk.tr[:], buf[64:64+TRSize]) + offset := 64 + TRSize + sk.s1.UnpackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * L + sk.s2.UnpackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * K + sk.t0.UnpackT0(buf[offset:]) + + // Cached values + sk.A.Derive(&sk.rho) + sk.t0h = sk.t0 + sk.t0h.NTT() + sk.s1h = sk.s1 + sk.s1h.NTT() + sk.s2h = sk.s2 + sk.s2h.NTT() +} + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error) { + var seed [32]byte + if rand == nil { + rand = cryptoRand.Reader + } + _, err := io.ReadFull(rand, seed[:]) + if err != nil { + return nil, nil, err + } + pk, sk := NewKeyFromSeed(&seed) + return pk, sk, nil +} + +// NewKeyFromSeed derives a public/private key pair using the given seed. +func NewKeyFromSeed(seed *[common.SeedSize]byte) (*PublicKey, *PrivateKey) { + var eSeed [128]byte // expanded seed + var pk PublicKey + var sk PrivateKey + var sSeed [64]byte + + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + + if NIST { + _, _ = h.Write([]byte{byte(K), byte(L)}) + } + + _, _ = h.Read(eSeed[:]) + + copy(pk.rho[:], eSeed[:32]) + copy(sSeed[:], eSeed[32:96]) + copy(sk.key[:], eSeed[96:]) + copy(sk.rho[:], pk.rho[:]) + + sk.A.Derive(&pk.rho) + + for i := uint16(0); i < L; i++ { + PolyDeriveUniformLeqEta(&sk.s1[i], &sSeed, i) + } + + for i := uint16(0); i < K; i++ { + PolyDeriveUniformLeqEta(&sk.s2[i], &sSeed, i+L) + } + + sk.s1h = sk.s1 + sk.s1h.NTT() + sk.s2h = sk.s2 + sk.s2h.NTT() + + sk.computeT0andT1(&sk.t0, &pk.t1) + + sk.t0h = sk.t0 + sk.t0h.NTT() + + // Complete public key far enough to be packed + pk.t1.PackT1(pk.t1p[:]) + pk.A = &sk.A + + // Finish private key + var packedPk [PublicKeySize]byte + pk.Pack(&packedPk) + + // tr = CRH(ρ ‖ t1) = CRH(pk) + h.Reset() + _, _ = h.Write(packedPk[:]) + _, _ = h.Read(sk.tr[:]) + + // Finish cache of public key + pk.tr = &sk.tr + + return &pk, &sk +} + +// Computes t0 and t1 from sk.s1h, sk.s2 and sk.A. +func (sk *PrivateKey) computeT0andT1(t0, t1 *VecK) { + var t VecK + + // Set t to A s₁ + s₂ + for i := 0; i < K; i++ { + PolyDotHat(&t[i], &sk.A[i], &sk.s1h) + t[i].ReduceLe2Q() + t[i].InvNTT() + } + t.Add(&t, &sk.s2) + t.Normalize() + + // Compute t₀, t₁ = Power2Round(t) + t.Power2Round(t0, t1) +} + +// Verify checks whether the given signature by pk on msg is valid. +// +// For Dilithium this is the top-level verification function. +// In ML-DSA, this is ML-DSA.Verify_internal. +func Verify(pk *PublicKey, msg func(io.Writer), signature []byte) bool { + var sig unpackedSignature + var mu [64]byte + var zh VecL + var Az, Az2dct1, w1 VecK + var ch common.Poly + var cp [CTildeSize]byte + var w1Packed [PolyW1Size * K]byte + + // Note that Unpack() checked whether ‖z‖_∞ < γ₁ - β + // and ensured that there at most ω ones in pk.hint. + if !sig.Unpack(signature) { + return false + } + + // μ = CRH(tr ‖ msg) + h := sha3.NewShake256() + _, _ = h.Write(pk.tr[:]) + msg(&h) + _, _ = h.Read(mu[:]) + + // Compute Az + zh = sig.z + zh.NTT() + + for i := 0; i < K; i++ { + PolyDotHat(&Az[i], &pk.A[i], &zh) + } + + // Next, we compute Az - 2ᵈ·c·t₁. + // Note that the coefficients of t₁ are bounded by 256 = 2⁹, + // so the coefficients of Az2dct1 will bounded by 2⁹⁺ᵈ = 2²³ < 2q, + // which is small enough for NTT(). + Az2dct1.MulBy2toD(&pk.t1) + Az2dct1.NTT() + PolyDeriveUniformBall(&ch, sig.c[:]) + ch.NTT() + for i := 0; i < K; i++ { + Az2dct1[i].MulHat(&Az2dct1[i], &ch) + } + Az2dct1.Sub(&Az, &Az2dct1) + Az2dct1.ReduceLe2Q() + Az2dct1.InvNTT() + Az2dct1.NormalizeAssumingLe2Q() + + // UseHint(pk.hint, Az - 2ᵈ·c·t₁) + // = UseHint(pk.hint, w - c·s₂ + c·t₀) + // = UseHint(pk.hint, r + c·t₀) + // = r₁ = w₁. + w1.UseHint(&Az2dct1, &sig.hint) + w1.PackW1(w1Packed[:]) + + // c' = H(μ, w₁) + h.Reset() + _, _ = h.Write(mu[:]) + _, _ = h.Write(w1Packed[:]) + _, _ = h.Read(cp[:]) + + return sig.c == cp +} + +// SignTo signs the given message and writes the signature into signature. +// +// For Dilithium this is the top-level signing function. For ML-DSA +// this is ML-DSA.Sign_internal. +// +//nolint:funlen +func SignTo(sk *PrivateKey, msg func(io.Writer), rnd [32]byte, signature []byte) { + var mu, rhop [64]byte + var w1Packed [PolyW1Size * K]byte + var y, yh VecL + var w, w0, w1, w0mcs2, ct0, w0mcs2pct0 VecK + var ch common.Poly + var yNonce uint16 + var sig unpackedSignature + + if len(signature) < SignatureSize { + panic("Signature does not fit in that byteslice") + } + + // μ = CRH(tr ‖ msg) + h := sha3.NewShake256() + _, _ = h.Write(sk.tr[:]) + msg(&h) + _, _ = h.Read(mu[:]) + + // ρ' = CRH(key ‖ μ) + h.Reset() + _, _ = h.Write(sk.key[:]) + if NIST { + _, _ = h.Write(rnd[:]) + } + _, _ = h.Write(mu[:]) + _, _ = h.Read(rhop[:]) + + // Main rejection loop + attempt := 0 + for { + attempt++ + if attempt >= 576 { + // Depending on the mode, one try has a chance between 1/7 and 1/4 + // of succeeding. Thus it is safe to say that 576 iterations + // are enough as (6/7)⁵⁷⁶ < 2⁻¹²⁸. + panic("This should only happen 1 in 2^{128}: something is wrong.") + } + + // y = ExpandMask(ρ', key) + VecLDeriveUniformLeGamma1(&y, &rhop, yNonce) + yNonce += uint16(L) + + // Set w to A y + yh = y + yh.NTT() + for i := 0; i < K; i++ { + PolyDotHat(&w[i], &sk.A[i], &yh) + w[i].ReduceLe2Q() + w[i].InvNTT() + } + + // Decompose w into w₀ and w₁ + w.NormalizeAssumingLe2Q() + w.Decompose(&w0, &w1) + + // c~ = H(μ ‖ w₁) + w1.PackW1(w1Packed[:]) + h.Reset() + _, _ = h.Write(mu[:]) + _, _ = h.Write(w1Packed[:]) + _, _ = h.Read(sig.c[:]) + + PolyDeriveUniformBall(&ch, sig.c[:]) + ch.NTT() + + // Ensure ‖ w₀ - c·s2 ‖_∞ < γ₂ - β. + // + // By Lemma 3 of the specification this is equivalent to checking that + // both ‖ r₀ ‖_∞ < γ₂ - β and r₁ = w₁, for the decomposition + // w - c·s₂ = r₁ α + r₀ as computed by decompose(). + // See also §4.1 of the specification. + for i := 0; i < K; i++ { + w0mcs2[i].MulHat(&ch, &sk.s2h[i]) + w0mcs2[i].InvNTT() + } + w0mcs2.Sub(&w0, &w0mcs2) + w0mcs2.Normalize() + + if w0mcs2.Exceeds(Gamma2 - Beta) { + continue + } + + // z = y + c·s₁ + for i := 0; i < L; i++ { + sig.z[i].MulHat(&ch, &sk.s1h[i]) + sig.z[i].InvNTT() + } + sig.z.Add(&sig.z, &y) + sig.z.Normalize() + + // Ensure ‖z‖_∞ < γ₁ - β + if sig.z.Exceeds(Gamma1 - Beta) { + continue + } + + // Compute c·t₀ + for i := 0; i < K; i++ { + ct0[i].MulHat(&ch, &sk.t0h[i]) + ct0[i].InvNTT() + } + ct0.NormalizeAssumingLe2Q() + + // Ensure ‖c·t₀‖_∞ < γ₂. + if ct0.Exceeds(Gamma2) { + continue + } + + // Create the hint to be able to reconstruct w₁ from w - c·s₂ + c·t0. + // Note that we're not using makeHint() in the obvious way as we + // do not know whether ‖ sc·s₂ - c·t₀ ‖_∞ < γ₂. Instead we note + // that our makeHint() is actually the same as a makeHint for a + // different decomposition: + // + // Earlier we ensured indirectly with a check that r₁ = w₁ where + // r = w - c·s₂. Hence r₀ = r - r₁ α = w - c·s₂ - w₁ α = w₀ - c·s₂. + // Thus MakeHint(w₀ - c·s₂ + c·t₀, w₁) = MakeHint(r0 + c·t₀, r₁) + // and UseHint(w - c·s₂ + c·t₀, w₁) = UseHint(r + c·t₀, r₁). + // As we just ensured that ‖ c·t₀ ‖_∞ < γ₂ our usage is correct. + w0mcs2pct0.Add(&w0mcs2, &ct0) + w0mcs2pct0.NormalizeAssumingLe2Q() + hintPop := sig.hint.MakeHint(&w0mcs2pct0, &w1) + if hintPop > Omega { + continue + } + + break + } + + sig.Pack(signature[:]) +} + +// Computes the public key corresponding to this private key. +func (sk *PrivateKey) Public() *PublicKey { + var t0 VecK + pk := &PublicKey{ + rho: sk.rho, + A: &sk.A, + tr: &sk.tr, + } + sk.computeT0andT1(&t0, &pk.t1) + pk.t1.PackT1(pk.t1p[:]) + return pk +} + +// Equal returns whether the two public keys are equal +func (pk *PublicKey) Equal(other *PublicKey) bool { + return pk.rho == other.rho && pk.t1 == other.t1 +} + +// Equal returns whether the two private keys are equal +func (sk *PrivateKey) Equal(other *PrivateKey) bool { + ret := (subtle.ConstantTimeCompare(sk.rho[:], other.rho[:]) & + subtle.ConstantTimeCompare(sk.key[:], other.key[:]) & + subtle.ConstantTimeCompare(sk.tr[:], other.tr[:])) + + acc := uint32(0) + for i := 0; i < L; i++ { + for j := 0; j < common.N; j++ { + acc |= sk.s1[i][j] ^ other.s1[i][j] + } + } + for i := 0; i < K; i++ { + for j := 0; j < common.N; j++ { + acc |= sk.s2[i][j] ^ other.s2[i][j] + acc |= sk.t0[i][j] ^ other.t0[i][j] + } + } + return (ret & subtle.ConstantTimeEq(int32(acc), 0)) == 1 +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/mat.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/mat.go new file mode 100644 index 0000000..ceaf634 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/mat.go @@ -0,0 +1,59 @@ +// Code generated from mode3/internal/mat.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// A k by l matrix of polynomials. +type Mat [K]VecL + +// Expands the given seed to a complete matrix. +// +// This function is called ExpandA in the specification. +func (m *Mat) Derive(seed *[32]byte) { + if !DeriveX4Available { + for i := uint16(0); i < K; i++ { + for j := uint16(0); j < L; j++ { + PolyDeriveUniform(&m[i][j], seed, (i<<8)+j) + } + } + return + } + + idx := 0 + var nonces [4]uint16 + var ps [4]*common.Poly + for i := uint16(0); i < K; i++ { + for j := uint16(0); j < L; j++ { + nonces[idx] = (i << 8) + j + ps[idx] = &m[i][j] + idx++ + if idx == 4 { + idx = 0 + PolyDeriveUniformX4(ps, seed, nonces) + } + } + } + if idx != 0 { + for i := idx; i < 4; i++ { + ps[i] = nil + } + PolyDeriveUniformX4(ps, seed, nonces) + } +} + +// Set p to the inner product of a and b using pointwise multiplication. +// +// Assumes a and b are in Montgomery form and their coefficients are +// pairwise sufficiently small to multiply, see Poly.MulHat(). Resulting +// coefficients are bounded by 2Lq. +func PolyDotHat(p *common.Poly, a, b *VecL) { + var t common.Poly + *p = common.Poly{} // zero p + for i := 0; i < L; i++ { + t.MulHat(&a[i], &b[i]) + p.Add(&t, p) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/pack.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/pack.go new file mode 100644 index 0000000..1854b41 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/pack.go @@ -0,0 +1,270 @@ +// Code generated from mode3/internal/pack.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// Writes p with norm less than or equal η into buf, which must be of +// size PolyLeqEtaSize. +// +// Assumes coefficients of p are not normalized, but in [q-η,q+η]. +func PolyPackLeqEta(p *common.Poly, buf []byte) { + if DoubleEtaBits == 4 { // compiler eliminates branch + j := 0 + for i := 0; i < PolyLeqEtaSize; i++ { + buf[i] = (byte(common.Q+Eta-p[j]) | + byte(common.Q+Eta-p[j+1])<<4) + j += 2 + } + } else if DoubleEtaBits == 3 { + j := 0 + for i := 0; i < PolyLeqEtaSize; i += 3 { + buf[i] = (byte(common.Q+Eta-p[j]) | + (byte(common.Q+Eta-p[j+1]) << 3) | + (byte(common.Q+Eta-p[j+2]) << 6)) + buf[i+1] = ((byte(common.Q+Eta-p[j+2]) >> 2) | + (byte(common.Q+Eta-p[j+3]) << 1) | + (byte(common.Q+Eta-p[j+4]) << 4) | + (byte(common.Q+Eta-p[j+5]) << 7)) + buf[i+2] = ((byte(common.Q+Eta-p[j+5]) >> 1) | + (byte(common.Q+Eta-p[j+6]) << 2) | + (byte(common.Q+Eta-p[j+7]) << 5)) + j += 8 + } + } else { + panic("eta not supported") + } +} + +// Sets p to the polynomial of norm less than or equal η encoded in the +// given buffer of size PolyLeqEtaSize. +// +// Output coefficients of p are not normalized, but in [q-η,q+η] provided +// buf was created using PackLeqEta. +// +// Beware, for arbitrary buf the coefficients of p might end up in +// the interval [q-2^b,q+2^b] where b is the least b with η≤2^b. +func PolyUnpackLeqEta(p *common.Poly, buf []byte) { + if DoubleEtaBits == 4 { // compiler eliminates branch + j := 0 + for i := 0; i < PolyLeqEtaSize; i++ { + p[j] = common.Q + Eta - uint32(buf[i]&15) + p[j+1] = common.Q + Eta - uint32(buf[i]>>4) + j += 2 + } + } else if DoubleEtaBits == 3 { + j := 0 + for i := 0; i < PolyLeqEtaSize; i += 3 { + p[j] = common.Q + Eta - uint32(buf[i]&7) + p[j+1] = common.Q + Eta - uint32((buf[i]>>3)&7) + p[j+2] = common.Q + Eta - uint32((buf[i]>>6)|((buf[i+1]<<2)&7)) + p[j+3] = common.Q + Eta - uint32((buf[i+1]>>1)&7) + p[j+4] = common.Q + Eta - uint32((buf[i+1]>>4)&7) + p[j+5] = common.Q + Eta - uint32((buf[i+1]>>7)|((buf[i+2]<<1)&7)) + p[j+6] = common.Q + Eta - uint32((buf[i+2]>>2)&7) + p[j+7] = common.Q + Eta - uint32((buf[i+2]>>5)&7) + j += 8 + } + } else { + panic("eta not supported") + } +} + +// Writes v with coefficients in {0, 1} of which at most ω non-zero +// to buf, which must have length ω+k. +func (v *VecK) PackHint(buf []byte) { + // The packed hint starts with the indices of the non-zero coefficients + // For instance: + // + // (x⁵⁶ + x¹⁰⁰, x²⁵⁵, 0, x² + x²³, x¹) + // + // Yields + // + // 56, 100, 255, 2, 23, 1 + // + // Then we pad with zeroes until we have a list of ω items: + // // 56, 100, 255, 2, 23, 1, 0, 0, ..., 0 + // + // Then we finish with a list of the switch-over-indices in this + // list between polynomials, so: + // + // 56, 100, 255, 2, 23, 1, 0, 0, ..., 0, 2, 3, 3, 5, 6 + + off := uint8(0) + for i := 0; i < K; i++ { + for j := uint16(0); j < common.N; j++ { + if v[i][j] != 0 { + buf[off] = uint8(j) + off++ + } + } + buf[Omega+i] = off + } + for ; off < Omega; off++ { + buf[off] = 0 + } +} + +// Sets v to the vector encoded using VecK.PackHint() +// +// Returns whether unpacking was successful. +func (v *VecK) UnpackHint(buf []byte) bool { + // A priori, there would be several reasonable ways to encode the same + // hint vector. We take care to only allow only one encoding, to ensure + // "strong unforgeability". + // + // See PackHint() source for description of the encoding. + *v = VecK{} // zero v + prevSOP := uint8(0) // previous switch-over-point + for i := 0; i < K; i++ { + SOP := buf[Omega+i] + if SOP < prevSOP || SOP > Omega { + return false // ensures switch-over-points are increasing + } + for j := prevSOP; j < SOP; j++ { + if j > prevSOP && buf[j] <= buf[j-1] { + return false // ensures indices are increasing (within a poly) + } + v[i][buf[j]] = 1 + } + prevSOP = SOP + } + for j := prevSOP; j < Omega; j++ { + if buf[j] != 0 { + return false // ensures padding indices are zero + } + } + + return true +} + +// Sets p to the polynomial packed into buf by PolyPackLeGamma1. +// +// p will be normalized. +func PolyUnpackLeGamma1(p *common.Poly, buf []byte) { + if Gamma1Bits == 17 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 9 { + p0 := uint32(buf[i]) | (uint32(buf[i+1]) << 8) | + (uint32(buf[i+2]&0x3) << 16) + p1 := uint32(buf[i+2]>>2) | (uint32(buf[i+3]) << 6) | + (uint32(buf[i+4]&0xf) << 14) + p2 := uint32(buf[i+4]>>4) | (uint32(buf[i+5]) << 4) | + (uint32(buf[i+6]&0x3f) << 12) + p3 := uint32(buf[i+6]>>6) | (uint32(buf[i+7]) << 2) | + (uint32(buf[i+8]) << 10) + + // coefficients in [0,…,2γ₁) + p0 = Gamma1 - p0 // (-γ₁,…,γ₁] + p1 = Gamma1 - p1 + p2 = Gamma1 - p2 + p3 = Gamma1 - p3 + + p0 += uint32(int32(p0)>>31) & common.Q // normalize + p1 += uint32(int32(p1)>>31) & common.Q + p2 += uint32(int32(p2)>>31) & common.Q + p3 += uint32(int32(p3)>>31) & common.Q + + p[j] = p0 + p[j+1] = p1 + p[j+2] = p2 + p[j+3] = p3 + + j += 4 + } + } else if Gamma1Bits == 19 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 5 { + p0 := uint32(buf[i]) | (uint32(buf[i+1]) << 8) | + (uint32(buf[i+2]&0xf) << 16) + p1 := uint32(buf[i+2]>>4) | (uint32(buf[i+3]) << 4) | + (uint32(buf[i+4]) << 12) + + p0 = Gamma1 - p0 + p1 = Gamma1 - p1 + + p0 += uint32(int32(p0)>>31) & common.Q + p1 += uint32(int32(p1)>>31) & common.Q + + p[j] = p0 + p[j+1] = p1 + + j += 2 + } + } else { + panic("γ₁ not supported") + } +} + +// Writes p whose coefficients are in (-γ₁,γ₁] into buf +// which has to be of length PolyLeGamma1Size. +// +// Assumes p is normalized. +func PolyPackLeGamma1(p *common.Poly, buf []byte) { + if Gamma1Bits == 17 { + j := 0 + // coefficients in [0,…,γ₁] ∪ (q-γ₁,…,q) + for i := 0; i < PolyLeGamma1Size; i += 9 { + p0 := Gamma1 - p[j] // [0,…,γ₁] ∪ (γ₁-q,…,2γ₁-q) + p0 += uint32(int32(p0)>>31) & common.Q // [0,…,2γ₁) + p1 := Gamma1 - p[j+1] + p1 += uint32(int32(p1)>>31) & common.Q + p2 := Gamma1 - p[j+2] + p2 += uint32(int32(p2)>>31) & common.Q + p3 := Gamma1 - p[j+3] + p3 += uint32(int32(p3)>>31) & common.Q + + buf[i+0] = byte(p0) + buf[i+1] = byte(p0 >> 8) + buf[i+2] = byte(p0>>16) | byte(p1<<2) + buf[i+3] = byte(p1 >> 6) + buf[i+4] = byte(p1>>14) | byte(p2<<4) + buf[i+5] = byte(p2 >> 4) + buf[i+6] = byte(p2>>12) | byte(p3<<6) + buf[i+7] = byte(p3 >> 2) + buf[i+8] = byte(p3 >> 10) + + j += 4 + } + } else if Gamma1Bits == 19 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 5 { + // Coefficients are in [0, γ₁] ∪ (Q-γ₁, Q) + p0 := Gamma1 - p[j] + p0 += uint32(int32(p0)>>31) & common.Q + p1 := Gamma1 - p[j+1] + p1 += uint32(int32(p1)>>31) & common.Q + + buf[i+0] = byte(p0) + buf[i+1] = byte(p0 >> 8) + buf[i+2] = byte(p0>>16) | byte(p1<<4) + buf[i+3] = byte(p1 >> 4) + buf[i+4] = byte(p1 >> 12) + + j += 2 + } + } else { + panic("γ₁ not supported") + } +} + +// Pack w₁ into buf, which must be of length PolyW1Size. +// +// Assumes w₁ is normalized. +func PolyPackW1(p *common.Poly, buf []byte) { + if Gamma1Bits == 19 { + p.PackLe16(buf) + } else if Gamma1Bits == 17 { + j := 0 + for i := 0; i < PolyW1Size; i += 3 { + buf[i] = byte(p[j]) | byte(p[j+1]<<6) + buf[i+1] = byte(p[j+1]>>2) | byte(p[j+2]<<4) + buf[i+2] = byte(p[j+2]>>4) | byte(p[j+3]<<2) + j += 4 + } + } else { + panic("unsupported γ₁") + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/params.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/params.go new file mode 100644 index 0000000..8a1f866 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/params.go @@ -0,0 +1,18 @@ +// Code generated from params.templ.go. DO NOT EDIT. + +package internal + +const ( + Name = "ML-DSA-65" + K = 6 + L = 5 + Eta = 4 + DoubleEtaBits = 4 + Omega = 55 + Tau = 49 + Gamma1Bits = 19 + Gamma2 = 261888 + NIST = true + TRSize = 64 + CTildeSize = 48 +) diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/rounding.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/rounding.go new file mode 100644 index 0000000..58123c0 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/rounding.go @@ -0,0 +1,142 @@ +// Code generated from mode3/internal/rounding.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// Splits 0 ≤ a < q into a₀ and a₁ with a = a₁*α + a₀ with -α/2 < a₀ ≤ α/2, +// except for when we would have a₁ = (q-1)/α in which case a₁=0 is taken +// and -α/2 ≤ a₀ < 0. Returns a₀ + q. Note 0 ≤ a₁ < (q-1)/α. +// Recall α = 2γ₂. +func decompose(a uint32) (a0plusQ, a1 uint32) { + // a₁ = ⌈a / 128⌉ + a1 = (a + 127) >> 7 + + if Alpha == 523776 { + // 1025/2²² is close enough to 1/4092 so that a₁ + // becomes a/α rounded down. + a1 = ((a1*1025 + (1 << 21)) >> 22) + + // For the corner-case a₁ = (q-1)/α = 16, we have to set a₁=0. + a1 &= 15 + } else if Alpha == 190464 { + // 1488/2²⁴ is close enough to 1/1488 so that a₁ + // becomes a/α rounded down. + a1 = ((a1 * 11275) + (1 << 23)) >> 24 + + // For the corner-case a₁ = (q-1)/α = 44, we have to set a₁=0. + a1 ^= uint32(int32(43-a1)>>31) & a1 + } else { + panic("unsupported α") + } + + a0plusQ = a - a1*Alpha + + // In the corner-case, when we set a₁=0, we will incorrectly + // have a₀ > (q-1)/2 and we'll need to subtract q. As we + // return a₀ + q, that comes down to adding q if a₀ < (q-1)/2. + a0plusQ += uint32(int32(a0plusQ-(common.Q-1)/2)>>31) & common.Q + + return +} + +// Assume 0 ≤ r, f < Q with ‖f‖_∞ ≤ α/2. Decompose r as r = r1*α + r0 as +// computed by decompose(). Write r' := r - f (mod Q). Now, decompose +// r'=r-f again as r' = r'1*α + r'0 using decompose(). As f is small, we +// have r'1 = r1 + h, where h ∈ {-1, 0, 1}. makeHint() computes |h| +// given z0 := r0 - f (mod Q) and r1. With |h|, which is called the hint, +// we can reconstruct r1 using only r' = r - f, which is done by useHint(). +// To wit: +// +// useHint( r - f, makeHint( r0 - f, r1 ) ) = r1. +// +// Assumes 0 ≤ z0 < Q. +func makeHint(z0, r1 uint32) uint32 { + // If -α/2 < r0 - f ≤ α/2, then r1*α + r0 - f is a valid decomposition of r' + // with the restrictions of decompose() and so r'1 = r1. So the hint + // should be 0. This is covered by the first two inequalities. + // There is one other case: if r0 - f = -α/2, then r1*α + r0 - f is also + // a valid decomposition if r1 = 0. In the other cases a one is carried + // and the hint should be 1. + if z0 <= Gamma2 || z0 > common.Q-Gamma2 || (z0 == common.Q-Gamma2 && r1 == 0) { + return 0 + } + return 1 +} + +// Uses the hint created by makeHint() to reconstruct r1 from r'=r-f; see +// documentation of makeHint() for context. +// Assumes 0 ≤ r' < Q. +func useHint(rp uint32, hint uint32) uint32 { + rp0plusQ, rp1 := decompose(rp) + if hint == 0 { + return rp1 + } + if rp0plusQ > common.Q { + return (rp1 + 1) & 15 + } + return (rp1 - 1) & 15 +} + +// Sets p to the hint polynomial for p0 the modified low bits and p1 +// the unmodified high bits --- see makeHint(). +// +// Returns the number of ones in the hint polynomial. +func PolyMakeHint(p, p0, p1 *common.Poly) (pop uint32) { + for i := 0; i < common.N; i++ { + h := makeHint(p0[i], p1[i]) + pop += h + p[i] = h + } + return +} + +// Computes corrections to the high bits of the polynomial q according +// to the hints in h and sets p to the corrected high bits. Returns p. +func PolyUseHint(p, q, hint *common.Poly) { + var q0PlusQ common.Poly + + // See useHint() and makeHint() for an explanation. We reimplement it + // here so that we can call Poly.Decompose(), which might be way faster + // than calling decompose() in a loop (for instance when having AVX2.) + + PolyDecompose(q, &q0PlusQ, p) + + for i := 0; i < common.N; i++ { + if hint[i] == 0 { + continue + } + if Gamma2 == 261888 { + if q0PlusQ[i] > common.Q { + p[i] = (p[i] + 1) & 15 + } else { + p[i] = (p[i] - 1) & 15 + } + } else if Gamma2 == 95232 { + if q0PlusQ[i] > common.Q { + if p[i] == 43 { + p[i] = 0 + } else { + p[i]++ + } + } else { + if p[i] == 0 { + p[i] = 43 + } else { + p[i]-- + } + } + } else { + panic("unsupported γ₂") + } + } +} + +// Splits each of the coefficients of p using decompose. +func PolyDecompose(p, p0PlusQ, p1 *common.Poly) { + for i := 0; i < common.N; i++ { + p0PlusQ[i], p1[i] = decompose(p[i]) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/sample.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/sample.go new file mode 100644 index 0000000..b37370a --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/sample.go @@ -0,0 +1,339 @@ +// Code generated from mode3/internal/sample.go by gen.go + +package internal + +import ( + "encoding/binary" + + "github.com/cloudflare/circl/internal/sha3" + common "github.com/cloudflare/circl/sign/internal/dilithium" + "github.com/cloudflare/circl/simd/keccakf1600" +) + +// DeriveX4Available indicates whether the system supports the quick fourway +// sampling variants like PolyDeriveUniformX4. +var DeriveX4Available = keccakf1600.IsEnabledX4() + +// For each i, sample ps[i] uniformly from the given seed and nonces[i]. +// ps[i] may be nil and is ignored in that case. +// +// Can only be called when DeriveX4Available is true. +func PolyDeriveUniformX4(ps [4]*common.Poly, seed *[32]byte, nonces [4]uint16) { + var perm keccakf1600.StateX4 + state := perm.Initialize(false) + + // Absorb the seed in the four states + for i := 0; i < 4; i++ { + v := binary.LittleEndian.Uint64(seed[8*i : 8*(i+1)]) + for j := 0; j < 4; j++ { + state[i*4+j] = v + } + } + + // Absorb the nonces, the SHAKE128 domain separator (0b1111), the + // start of the padding (0b...001) and the end of the padding 0b100... + // Recall that the rate of SHAKE128 is 168 --- i.e. 21 uint64s. + for j := 0; j < 4; j++ { + state[4*4+j] = uint64(nonces[j]) | (0x1f << 16) + state[20*4+j] = 0x80 << 56 + } + + var idx [4]int // indices into ps + for j := 0; j < 4; j++ { + if ps[j] == nil { + idx[j] = common.N // mark nil polynomial as completed + } + } + + done := false + for !done { + // Applies KeccaK-f[1600] to state to get the next 21 uint64s of each + // of the four SHAKE128 streams. + perm.Permute() + + done = true + + PolyLoop: + for j := 0; j < 4; j++ { + if idx[j] == common.N { + continue + } + for i := 0; i < 7; i++ { + var t [8]uint32 + t[0] = uint32(state[i*3*4+j] & 0x7fffff) + t[1] = uint32((state[i*3*4+j] >> 24) & 0x7fffff) + t[2] = uint32((state[i*3*4+j] >> 48) | + ((state[(i*3+1)*4+j] & 0x7f) << 16)) + t[3] = uint32((state[(i*3+1)*4+j] >> 8) & 0x7fffff) + t[4] = uint32((state[(i*3+1)*4+j] >> 32) & 0x7fffff) + t[5] = uint32((state[(i*3+1)*4+j] >> 56) | + ((state[(i*3+2)*4+j] & 0x7fff) << 8)) + t[6] = uint32((state[(i*3+2)*4+j] >> 16) & 0x7fffff) + t[7] = uint32((state[(i*3+2)*4+j] >> 40) & 0x7fffff) + + for k := 0; k < 8; k++ { + if t[k] < common.Q { + ps[j][idx[j]] = t[k] + idx[j]++ + if idx[j] == common.N { + continue PolyLoop + } + } + } + } + done = false + } + } +} + +// Sample p uniformly from the given seed and nonce. +// +// p will be normalized. +func PolyDeriveUniform(p *common.Poly, seed *[32]byte, nonce uint16) { + var i, length int + var buf [12 * 16]byte // fits 168B SHAKE-128 rate + + length = 168 + + sample := func() { + // Note that 3 divides into 168 and 12*16, so we use up buf completely. + for j := 0; j < length && i < common.N; j += 3 { + t := (uint32(buf[j]) | (uint32(buf[j+1]) << 8) | + (uint32(buf[j+2]) << 16)) & 0x7fffff + + // We use rejection sampling + if t < common.Q { + p[i] = t + i++ + } + } + } + + var iv [32 + 2]byte // 32 byte seed + uint16 nonce + h := sha3.NewShake128() + copy(iv[:32], seed[:]) + iv[32] = uint8(nonce) + iv[33] = uint8(nonce >> 8) + _, _ = h.Write(iv[:]) + + for i < common.N { + _, _ = h.Read(buf[:168]) + sample() + } +} + +// Sample p uniformly with coefficients of norm less than or equal η, +// using the given seed and nonce. +// +// p will not be normalized, but will have coefficients in [q-η,q+η]. +func PolyDeriveUniformLeqEta(p *common.Poly, seed *[64]byte, nonce uint16) { + // Assumes 2 < η < 8. + var i, length int + var buf [9 * 16]byte // fits 136B SHAKE-256 rate + + length = 136 + + sample := func() { + // We use rejection sampling + for j := 0; j < length && i < common.N; j++ { + t1 := uint32(buf[j]) & 15 + t2 := uint32(buf[j]) >> 4 + if Eta == 2 { // branch is eliminated by compiler + if t1 <= 14 { + t1 -= ((205 * t1) >> 10) * 5 // reduce mod 5 + p[i] = common.Q + Eta - t1 + i++ + } + if t2 <= 14 && i < common.N { + t2 -= ((205 * t2) >> 10) * 5 // reduce mod 5 + p[i] = common.Q + Eta - t2 + i++ + } + } else if Eta == 4 { + if t1 <= 2*Eta { + p[i] = common.Q + Eta - t1 + i++ + } + if t2 <= 2*Eta && i < common.N { + p[i] = common.Q + Eta - t2 + i++ + } + } else { + panic("unsupported η") + } + } + } + + var iv [64 + 2]byte // 64 byte seed + uint16 nonce + + h := sha3.NewShake256() + copy(iv[:64], seed[:]) + iv[64] = uint8(nonce) + iv[65] = uint8(nonce >> 8) + + // 136 is SHAKE-256 rate + _, _ = h.Write(iv[:]) + + for i < common.N { + _, _ = h.Read(buf[:136]) + sample() + } +} + +// Sample v[i] uniformly with coefficients in (-γ₁,…,γ₁] using the +// given seed and nonce+i +// +// p will be normalized. +func VecLDeriveUniformLeGamma1(v *VecL, seed *[64]byte, nonce uint16) { + for i := 0; i < L; i++ { + PolyDeriveUniformLeGamma1(&v[i], seed, nonce+uint16(i)) + } +} + +// Sample p uniformly with coefficients in (-γ₁,…,γK1s] using the +// given seed and nonce. +// +// p will be normalized. +func PolyDeriveUniformLeGamma1(p *common.Poly, seed *[64]byte, nonce uint16) { + var buf [PolyLeGamma1Size]byte + + var iv [66]byte + h := sha3.NewShake256() + copy(iv[:64], seed[:]) + iv[64] = uint8(nonce) + iv[65] = uint8(nonce >> 8) + _, _ = h.Write(iv[:]) + _, _ = h.Read(buf[:]) + + PolyUnpackLeGamma1(p, buf[:]) +} + +// For each i, sample ps[i] uniformly with τ non-zero coefficients in {q-1,1} +// using the given seed and w1[i]. ps[i] may be nil and is ignored +// in that case. ps[i] will be normalized. +// +// Can only be called when DeriveX4Available is true. +// +// This function is currently not used (yet). +func PolyDeriveUniformBallX4(ps [4]*common.Poly, seed []byte) { + var perm keccakf1600.StateX4 + state := perm.Initialize(false) + + // Absorb the seed in the four states + for i := 0; i < CTildeSize/8; i++ { + v := binary.LittleEndian.Uint64(seed[8*i : 8*(i+1)]) + for j := 0; j < 4; j++ { + state[i*4+j] = v + } + } + + // SHAKE256 domain separator and padding + for j := 0; j < 4; j++ { + state[(CTildeSize/8)*4+j] ^= 0x1f + state[16*4+j] ^= 0x80 << 56 + } + perm.Permute() + + var signs [4]uint64 + var idx [4]uint16 // indices into ps + + for j := 0; j < 4; j++ { + if ps[j] != nil { + signs[j] = state[j] + *ps[j] = common.Poly{} // zero ps[j] + idx[j] = common.N - Tau + } else { + idx[j] = common.N // mark as completed + } + } + + stateOffset := 1 + for { + done := true + + PolyLoop: + for j := 0; j < 4; j++ { + if idx[j] == common.N { + continue + } + + for i := stateOffset; i < 17; i++ { + var bs [8]byte + binary.LittleEndian.PutUint64(bs[:], state[4*i+j]) + for k := 0; k < 8; k++ { + b := uint16(bs[k]) + + if b > idx[j] { + continue + } + + ps[j][idx[j]] = ps[j][b] + ps[j][b] = 1 + // Takes least significant bit of signs and uses it for the sign. + // Note 1 ^ (1 | (Q-1)) = Q-1. + ps[j][b] ^= uint32((-(signs[j] & 1)) & (1 | (common.Q - 1))) + signs[j] >>= 1 + + idx[j]++ + if idx[j] == common.N { + continue PolyLoop + } + } + } + + done = false + } + + if done { + break + } + + perm.Permute() + stateOffset = 0 + } +} + +// Samples p uniformly with τ non-zero coefficients in {q-1,1}. +// +// The polynomial p will be normalized. +func PolyDeriveUniformBall(p *common.Poly, seed []byte) { + var buf [136]byte // SHAKE-256 rate is 136 + + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + _, _ = h.Read(buf[:]) + + // Essentially we generate a sequence of τ ones or minus ones, + // prepend 196 zeroes and shuffle the concatenation using the + // usual algorithm (Fisher--Yates.) + signs := binary.LittleEndian.Uint64(buf[:]) + bufOff := 8 // offset into buf + + *p = common.Poly{} // zero p + for i := uint16(common.N - Tau); i < common.N; i++ { + var b uint16 + + // Find location of where to move the new coefficient to using + // rejection sampling. + for { + if bufOff >= 136 { + _, _ = h.Read(buf[:]) + bufOff = 0 + } + + b = uint16(buf[bufOff]) + bufOff++ + + if b <= i { + break + } + } + + p[i] = p[b] + p[b] = 1 + // Takes least significant bit of signs and uses it for the sign. + // Note 1 ^ (1 | (Q-1)) = Q-1. + p[b] ^= uint32((-(signs & 1)) & (1 | (common.Q - 1))) + signs >>= 1 + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/vec.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/vec.go new file mode 100644 index 0000000..d07d3b2 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa65/internal/vec.go @@ -0,0 +1,281 @@ +// Code generated from mode3/internal/vec.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// A vector of L polynomials. +type VecL [L]common.Poly + +// A vector of K polynomials. +type VecK [K]common.Poly + +// Normalize the polynomials in this vector. +func (v *VecL) Normalize() { + for i := 0; i < L; i++ { + v[i].Normalize() + } +} + +// Normalize the polynomials in this vector assuming their coefficients +// are already bounded by 2q. +func (v *VecL) NormalizeAssumingLe2Q() { + for i := 0; i < L; i++ { + v[i].NormalizeAssumingLe2Q() + } +} + +// Sets v to w + u. Does not normalize. +func (v *VecL) Add(w, u *VecL) { + for i := 0; i < L; i++ { + v[i].Add(&w[i], &u[i]) + } +} + +// Applies NTT componentwise. See Poly.NTT() for details. +func (v *VecL) NTT() { + for i := 0; i < L; i++ { + v[i].NTT() + } +} + +// Checks whether any of the coefficients exceeds the given bound in supnorm +// +// Requires the vector to be normalized. +func (v *VecL) Exceeds(bound uint32) bool { + for i := 0; i < L; i++ { + if v[i].Exceeds(bound) { + return true + } + } + return false +} + +// Applies Poly.Power2Round componentwise. +// +// Requires the vector to be normalized. +func (v *VecL) Power2Round(v0PlusQ, v1 *VecL) { + for i := 0; i < L; i++ { + v[i].Power2Round(&v0PlusQ[i], &v1[i]) + } +} + +// Applies Poly.Decompose componentwise. +// +// Requires the vector to be normalized. +func (v *VecL) Decompose(v0PlusQ, v1 *VecL) { + for i := 0; i < L; i++ { + PolyDecompose(&v[i], &v0PlusQ[i], &v1[i]) + } +} + +// Sequentially packs each polynomial using Poly.PackLeqEta(). +func (v *VecL) PackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyPackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sets v to the polynomials packed in buf using VecL.PackLeqEta(). +func (v *VecL) UnpackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyUnpackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sequentially packs each polynomial using PolyPackLeGamma1(). +func (v *VecL) PackLeGamma1(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyPackLeGamma1(&v[i], buf[offset:]) + offset += PolyLeGamma1Size + } +} + +// Sets v to the polynomials packed in buf using VecL.PackLeGamma1(). +func (v *VecL) UnpackLeGamma1(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyUnpackLeGamma1(&v[i], buf[offset:]) + offset += PolyLeGamma1Size + } +} + +// Normalize the polynomials in this vector. +func (v *VecK) Normalize() { + for i := 0; i < K; i++ { + v[i].Normalize() + } +} + +// Normalize the polynomials in this vector assuming their coefficients +// are already bounded by 2q. +func (v *VecK) NormalizeAssumingLe2Q() { + for i := 0; i < K; i++ { + v[i].NormalizeAssumingLe2Q() + } +} + +// Sets v to w + u. Does not normalize. +func (v *VecK) Add(w, u *VecK) { + for i := 0; i < K; i++ { + v[i].Add(&w[i], &u[i]) + } +} + +// Checks whether any of the coefficients exceeds the given bound in supnorm +// +// Requires the vector to be normalized. +func (v *VecK) Exceeds(bound uint32) bool { + for i := 0; i < K; i++ { + if v[i].Exceeds(bound) { + return true + } + } + return false +} + +// Applies Poly.Power2Round componentwise. +// +// Requires the vector to be normalized. +func (v *VecK) Power2Round(v0PlusQ, v1 *VecK) { + for i := 0; i < K; i++ { + v[i].Power2Round(&v0PlusQ[i], &v1[i]) + } +} + +// Applies Poly.Decompose componentwise. +// +// Requires the vector to be normalized. +func (v *VecK) Decompose(v0PlusQ, v1 *VecK) { + for i := 0; i < K; i++ { + PolyDecompose(&v[i], &v0PlusQ[i], &v1[i]) + } +} + +// Sets v to the hint vector for v0 the modified low bits and v1 +// the unmodified high bits --- see makeHint(). +// +// Returns the number of ones in the hint vector. +func (v *VecK) MakeHint(v0, v1 *VecK) (pop uint32) { + for i := 0; i < K; i++ { + pop += PolyMakeHint(&v[i], &v0[i], &v1[i]) + } + return +} + +// Computes corrections to the high bits of the polynomials in the vector +// w using the hints in h and sets v to the corrected high bits. Returns v. +// See useHint(). +func (v *VecK) UseHint(q, hint *VecK) *VecK { + for i := 0; i < K; i++ { + PolyUseHint(&v[i], &q[i], &hint[i]) + } + return v +} + +// Sequentially packs each polynomial using Poly.PackT1(). +func (v *VecK) PackT1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].PackT1(buf[offset:]) + offset += common.PolyT1Size + } +} + +// Sets v to the vector packed into buf by PackT1(). +func (v *VecK) UnpackT1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].UnpackT1(buf[offset:]) + offset += common.PolyT1Size + } +} + +// Sequentially packs each polynomial using Poly.PackT0(). +func (v *VecK) PackT0(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].PackT0(buf[offset:]) + offset += common.PolyT0Size + } +} + +// Sets v to the vector packed into buf by PackT0(). +func (v *VecK) UnpackT0(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].UnpackT0(buf[offset:]) + offset += common.PolyT0Size + } +} + +// Sequentially packs each polynomial using Poly.PackLeqEta(). +func (v *VecK) PackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyPackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sets v to the polynomials packed in buf using VecK.PackLeqEta(). +func (v *VecK) UnpackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyUnpackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Applies NTT componentwise. See Poly.NTT() for details. +func (v *VecK) NTT() { + for i := 0; i < K; i++ { + v[i].NTT() + } +} + +// Sequentially packs each polynomial using PolyPackW1(). +func (v *VecK) PackW1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyPackW1(&v[i], buf[offset:]) + offset += PolyW1Size + } +} + +// Sets v to a - b. +// +// Warning: assumes coefficients of the polynomials of b are less than 2q. +func (v *VecK) Sub(a, b *VecK) { + for i := 0; i < K; i++ { + v[i].Sub(&a[i], &b[i]) + } +} + +// Sets v to 2ᵈ w without reducing. +func (v *VecK) MulBy2toD(w *VecK) { + for i := 0; i < K; i++ { + v[i].MulBy2toD(&w[i]) + } +} + +// Applies InvNTT componentwise. See Poly.InvNTT() for details. +func (v *VecK) InvNTT() { + for i := 0; i < K; i++ { + v[i].InvNTT() + } +} + +// Applies Poly.ReduceLe2Q() componentwise. +func (v *VecK) ReduceLe2Q() { + for i := 0; i < K; i++ { + v[i].ReduceLe2Q() + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/dilithium.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/dilithium.go new file mode 100644 index 0000000..cb016e7 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/dilithium.go @@ -0,0 +1,361 @@ +// Code generated from pkg.templ.go. DO NOT EDIT. + +// mldsa87 implements NIST signature scheme ML-DSA-87 as defined in FIPS204. +package mldsa87 + +import ( + "crypto" + cryptoRand "crypto/rand" + "encoding/asn1" + "errors" + "io" + + "github.com/cloudflare/circl/sign" + common "github.com/cloudflare/circl/sign/internal/dilithium" + "github.com/cloudflare/circl/sign/mldsa/mldsa87/internal" +) + +const ( + // Size of seed for NewKeyFromSeed + SeedSize = common.SeedSize + + // Size of a packed PublicKey + PublicKeySize = internal.PublicKeySize + + // Size of a packed PrivateKey + PrivateKeySize = internal.PrivateKeySize + + // Size of a signature + SignatureSize = internal.SignatureSize +) + +// PublicKey is the type of ML-DSA-87 public key +type PublicKey internal.PublicKey + +// PrivateKey is the type of ML-DSA-87 private key +type PrivateKey internal.PrivateKey + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error) { + pk, sk, err := internal.GenerateKey(rand) + return (*PublicKey)(pk), (*PrivateKey)(sk), err +} + +// NewKeyFromSeed derives a public/private key pair using the given seed. +func NewKeyFromSeed(seed *[SeedSize]byte) (*PublicKey, *PrivateKey) { + pk, sk := internal.NewKeyFromSeed(seed) + return (*PublicKey)(pk), (*PrivateKey)(sk) +} + +// SignTo signs the given message and writes the signature into signature. +// It will panic if signature is not of length at least SignatureSize. +// +// ctx is the optional context string. Errors if ctx is larger than 255 bytes. +// A nil context string is equivalent to an empty context string. +func SignTo(sk *PrivateKey, msg, ctx []byte, randomized bool, sig []byte) error { + var rnd [32]byte + if randomized { + _, err := cryptoRand.Read(rnd[:]) + if err != nil { + return err + } + } + + if len(ctx) > 255 { + return sign.ErrContextTooLong + } + + internal.SignTo( + (*internal.PrivateKey)(sk), + func(w io.Writer) { + _, _ = w.Write([]byte{0}) + _, _ = w.Write([]byte{byte(len(ctx))}) + + if ctx != nil { + _, _ = w.Write(ctx) + } + w.Write(msg) + }, + rnd, + sig, + ) + return nil +} + +// Do not use. Implements ML-DSA.Sign_internal used for compatibility tests. +func (sk *PrivateKey) unsafeSignInternal(msg []byte, rnd [32]byte) []byte { + var ret [SignatureSize]byte + internal.SignTo( + (*internal.PrivateKey)(sk), + func(w io.Writer) { + _, _ = w.Write(msg) + }, + rnd, + ret[:], + ) + return ret[:] +} + +// Do not use. Implements ML-DSA.Verify_internal used for compatibility tests. +func unsafeVerifyInternal(pk *PublicKey, msg, sig []byte) bool { + return internal.Verify( + (*internal.PublicKey)(pk), + func(w io.Writer) { + _, _ = w.Write(msg) + }, + sig, + ) +} + +// Verify checks whether the given signature by pk on msg is valid. +// +// ctx is the optional context string. Fails if ctx is larger than 255 bytes. +// A nil context string is equivalent to an empty context string. +func Verify(pk *PublicKey, msg, ctx, sig []byte) bool { + if len(ctx) > 255 { + return false + } + return internal.Verify( + (*internal.PublicKey)(pk), + func(w io.Writer) { + _, _ = w.Write([]byte{0}) + _, _ = w.Write([]byte{byte(len(ctx))}) + + if ctx != nil { + _, _ = w.Write(ctx) + } + _, _ = w.Write(msg) + }, + sig, + ) +} + +// Sets pk to the public key encoded in buf. +func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte) { + (*internal.PublicKey)(pk).Unpack(buf) +} + +// Sets sk to the private key encoded in buf. +func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte) { + (*internal.PrivateKey)(sk).Unpack(buf) +} + +// Packs the public key into buf. +func (pk *PublicKey) Pack(buf *[PublicKeySize]byte) { + (*internal.PublicKey)(pk).Pack(buf) +} + +// Packs the private key into buf. +func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte) { + (*internal.PrivateKey)(sk).Pack(buf) +} + +// Packs the public key. +func (pk *PublicKey) Bytes() []byte { + var buf [PublicKeySize]byte + pk.Pack(&buf) + return buf[:] +} + +// Packs the private key. +func (sk *PrivateKey) Bytes() []byte { + var buf [PrivateKeySize]byte + sk.Pack(&buf) + return buf[:] +} + +// Packs the public key. +func (pk *PublicKey) MarshalBinary() ([]byte, error) { + return pk.Bytes(), nil +} + +// Packs the private key. +func (sk *PrivateKey) MarshalBinary() ([]byte, error) { + return sk.Bytes(), nil +} + +// Unpacks the public key from data. +func (pk *PublicKey) UnmarshalBinary(data []byte) error { + if len(data) != PublicKeySize { + return errors.New("packed public key must be of mldsa87.PublicKeySize bytes") + } + var buf [PublicKeySize]byte + copy(buf[:], data) + pk.Unpack(&buf) + return nil +} + +// Unpacks the private key from data. +func (sk *PrivateKey) UnmarshalBinary(data []byte) error { + if len(data) != PrivateKeySize { + return errors.New("packed private key must be of mldsa87.PrivateKeySize bytes") + } + var buf [PrivateKeySize]byte + copy(buf[:], data) + sk.Unpack(&buf) + return nil +} + +// Sign signs the given message. +// +// opts.HashFunc() must return zero, which can be achieved by passing +// crypto.Hash(0) for opts. rand is ignored. Will only return an error +// if opts.HashFunc() is non-zero. +// +// This function is used to make PrivateKey implement the crypto.Signer +// interface. The package-level SignTo function might be more convenient +// to use. +func (sk *PrivateKey) Sign(rand io.Reader, msg []byte, opts crypto.SignerOpts) ( + sig []byte, err error) { + var ret [SignatureSize]byte + + if opts.HashFunc() != crypto.Hash(0) { + return nil, errors.New("dilithium: cannot sign hashed message") + } + if err = SignTo(sk, msg, nil, false, ret[:]); err != nil { + return nil, err + } + + return ret[:], nil +} + +// Computes the public key corresponding to this private key. +// +// Returns a *PublicKey. The type crypto.PublicKey is used to make +// PrivateKey implement the crypto.Signer interface. +func (sk *PrivateKey) Public() crypto.PublicKey { + return (*PublicKey)((*internal.PrivateKey)(sk).Public()) +} + +// Equal returns whether the two private keys equal. +func (sk *PrivateKey) Equal(other crypto.PrivateKey) bool { + castOther, ok := other.(*PrivateKey) + if !ok { + return false + } + return (*internal.PrivateKey)(sk).Equal((*internal.PrivateKey)(castOther)) +} + +// Equal returns whether the two public keys equal. +func (pk *PublicKey) Equal(other crypto.PublicKey) bool { + castOther, ok := other.(*PublicKey) + if !ok { + return false + } + return (*internal.PublicKey)(pk).Equal((*internal.PublicKey)(castOther)) +} + +// Boilerplate for generic signatures API + +type scheme struct{} + +var sch sign.Scheme = &scheme{} + +// Scheme returns a generic signature interface for ML-DSA-87. +func Scheme() sign.Scheme { return sch } + +func (*scheme) Name() string { return "ML-DSA-87" } +func (*scheme) PublicKeySize() int { return PublicKeySize } +func (*scheme) PrivateKeySize() int { return PrivateKeySize } +func (*scheme) SignatureSize() int { return SignatureSize } +func (*scheme) SeedSize() int { return SeedSize } + +// TODO TLSIdentifier() +func (*scheme) Oid() asn1.ObjectIdentifier { + return asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 19} +} + +func (*scheme) SupportsContext() bool { + return true +} + +func (*scheme) GenerateKey() (sign.PublicKey, sign.PrivateKey, error) { + return GenerateKey(nil) +} + +func (*scheme) Sign( + sk sign.PrivateKey, + msg []byte, + opts *sign.SignatureOpts, +) []byte { + var ctx []byte + sig := make([]byte, SignatureSize) + + priv, ok := sk.(*PrivateKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + ctx = []byte(opts.Context) + } + err := SignTo(priv, msg, ctx, false, sig) + if err != nil { + panic(err) + } + + return sig +} + +func (*scheme) Verify( + pk sign.PublicKey, + msg, sig []byte, + opts *sign.SignatureOpts, +) bool { + var ctx []byte + pub, ok := pk.(*PublicKey) + if !ok { + panic(sign.ErrTypeMismatch) + } + if opts != nil && opts.Context != "" { + ctx = []byte(opts.Context) + } + return Verify(pub, msg, ctx, sig) +} + +func (*scheme) DeriveKey(seed []byte) (sign.PublicKey, sign.PrivateKey) { + if len(seed) != SeedSize { + panic(sign.ErrSeedSize) + } + var seed2 [SeedSize]byte + copy(seed2[:], seed) + return NewKeyFromSeed(&seed2) +} + +func (*scheme) UnmarshalBinaryPublicKey(buf []byte) (sign.PublicKey, error) { + if len(buf) != PublicKeySize { + return nil, sign.ErrPubKeySize + } + + var ( + buf2 [PublicKeySize]byte + ret PublicKey + ) + + copy(buf2[:], buf) + ret.Unpack(&buf2) + return &ret, nil +} + +func (*scheme) UnmarshalBinaryPrivateKey(buf []byte) (sign.PrivateKey, error) { + if len(buf) != PrivateKeySize { + return nil, sign.ErrPrivKeySize + } + + var ( + buf2 [PrivateKeySize]byte + ret PrivateKey + ) + + copy(buf2[:], buf) + ret.Unpack(&buf2) + return &ret, nil +} + +func (sk *PrivateKey) Scheme() sign.Scheme { + return sch +} + +func (sk *PublicKey) Scheme() sign.Scheme { + return sch +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/dilithium.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/dilithium.go new file mode 100644 index 0000000..8f1c8e5 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/dilithium.go @@ -0,0 +1,491 @@ +// Code generated from mode3/internal/dilithium.go by gen.go + +package internal + +import ( + cryptoRand "crypto/rand" + "crypto/subtle" + "io" + + "github.com/cloudflare/circl/internal/sha3" + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +const ( + // Size of a packed polynomial of norm ≤η. + // (Note that the formula is not valid in general.) + PolyLeqEtaSize = (common.N * DoubleEtaBits) / 8 + + // β = τη, the maximum size of c s₂. + Beta = Tau * Eta + + // γ₁ range of y + Gamma1 = 1 << Gamma1Bits + + // Size of packed polynomial of norm <γ₁ such as z + PolyLeGamma1Size = (Gamma1Bits + 1) * common.N / 8 + + // α = 2γ₂ parameter for decompose + Alpha = 2 * Gamma2 + + // Size of a packed private key + PrivateKeySize = 32 + 32 + TRSize + PolyLeqEtaSize*(L+K) + common.PolyT0Size*K + + // Size of a packed public key + PublicKeySize = 32 + common.PolyT1Size*K + + // Size of a packed signature + SignatureSize = L*PolyLeGamma1Size + Omega + K + CTildeSize + + // Size of packed w₁ + PolyW1Size = (common.N * (common.QBits - Gamma1Bits)) / 8 +) + +// PublicKey is the type of Dilithium public keys. +type PublicKey struct { + rho [32]byte + t1 VecK + + // Cached values + t1p [common.PolyT1Size * K]byte + A *Mat + tr *[TRSize]byte +} + +// PrivateKey is the type of Dilithium private keys. +type PrivateKey struct { + rho [32]byte + key [32]byte + s1 VecL + s2 VecK + t0 VecK + tr [TRSize]byte + + // Cached values + A Mat // ExpandA(ρ) + s1h VecL // NTT(s₁) + s2h VecK // NTT(s₂) + t0h VecK // NTT(t₀) +} + +type unpackedSignature struct { + z VecL + hint VecK + c [CTildeSize]byte +} + +// Packs the signature into buf. +func (sig *unpackedSignature) Pack(buf []byte) { + copy(buf[:], sig.c[:]) + sig.z.PackLeGamma1(buf[CTildeSize:]) + sig.hint.PackHint(buf[CTildeSize+L*PolyLeGamma1Size:]) +} + +// Sets sig to the signature encoded in the buffer. +// +// Returns whether buf contains a properly packed signature. +func (sig *unpackedSignature) Unpack(buf []byte) bool { + if len(buf) < SignatureSize { + return false + } + copy(sig.c[:], buf[:]) + sig.z.UnpackLeGamma1(buf[CTildeSize:]) + if sig.z.Exceeds(Gamma1 - Beta) { + return false + } + if !sig.hint.UnpackHint(buf[CTildeSize+L*PolyLeGamma1Size:]) { + return false + } + return true +} + +// Packs the public key into buf. +func (pk *PublicKey) Pack(buf *[PublicKeySize]byte) { + copy(buf[:32], pk.rho[:]) + copy(buf[32:], pk.t1p[:]) +} + +// Sets pk to the public key encoded in buf. +func (pk *PublicKey) Unpack(buf *[PublicKeySize]byte) { + copy(pk.rho[:], buf[:32]) + copy(pk.t1p[:], buf[32:]) + + pk.t1.UnpackT1(pk.t1p[:]) + pk.A = new(Mat) + pk.A.Derive(&pk.rho) + + // tr = CRH(ρ ‖ t1) = CRH(pk) + pk.tr = new([TRSize]byte) + h := sha3.NewShake256() + _, _ = h.Write(buf[:]) + _, _ = h.Read(pk.tr[:]) +} + +// Packs the private key into buf. +func (sk *PrivateKey) Pack(buf *[PrivateKeySize]byte) { + copy(buf[:32], sk.rho[:]) + copy(buf[32:64], sk.key[:]) + copy(buf[64:64+TRSize], sk.tr[:]) + offset := 64 + TRSize + sk.s1.PackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * L + sk.s2.PackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * K + sk.t0.PackT0(buf[offset:]) +} + +// Sets sk to the private key encoded in buf. +func (sk *PrivateKey) Unpack(buf *[PrivateKeySize]byte) { + copy(sk.rho[:], buf[:32]) + copy(sk.key[:], buf[32:64]) + copy(sk.tr[:], buf[64:64+TRSize]) + offset := 64 + TRSize + sk.s1.UnpackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * L + sk.s2.UnpackLeqEta(buf[offset:]) + offset += PolyLeqEtaSize * K + sk.t0.UnpackT0(buf[offset:]) + + // Cached values + sk.A.Derive(&sk.rho) + sk.t0h = sk.t0 + sk.t0h.NTT() + sk.s1h = sk.s1 + sk.s1h.NTT() + sk.s2h = sk.s2 + sk.s2h.NTT() +} + +// GenerateKey generates a public/private key pair using entropy from rand. +// If rand is nil, crypto/rand.Reader will be used. +func GenerateKey(rand io.Reader) (*PublicKey, *PrivateKey, error) { + var seed [32]byte + if rand == nil { + rand = cryptoRand.Reader + } + _, err := io.ReadFull(rand, seed[:]) + if err != nil { + return nil, nil, err + } + pk, sk := NewKeyFromSeed(&seed) + return pk, sk, nil +} + +// NewKeyFromSeed derives a public/private key pair using the given seed. +func NewKeyFromSeed(seed *[common.SeedSize]byte) (*PublicKey, *PrivateKey) { + var eSeed [128]byte // expanded seed + var pk PublicKey + var sk PrivateKey + var sSeed [64]byte + + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + + if NIST { + _, _ = h.Write([]byte{byte(K), byte(L)}) + } + + _, _ = h.Read(eSeed[:]) + + copy(pk.rho[:], eSeed[:32]) + copy(sSeed[:], eSeed[32:96]) + copy(sk.key[:], eSeed[96:]) + copy(sk.rho[:], pk.rho[:]) + + sk.A.Derive(&pk.rho) + + for i := uint16(0); i < L; i++ { + PolyDeriveUniformLeqEta(&sk.s1[i], &sSeed, i) + } + + for i := uint16(0); i < K; i++ { + PolyDeriveUniformLeqEta(&sk.s2[i], &sSeed, i+L) + } + + sk.s1h = sk.s1 + sk.s1h.NTT() + sk.s2h = sk.s2 + sk.s2h.NTT() + + sk.computeT0andT1(&sk.t0, &pk.t1) + + sk.t0h = sk.t0 + sk.t0h.NTT() + + // Complete public key far enough to be packed + pk.t1.PackT1(pk.t1p[:]) + pk.A = &sk.A + + // Finish private key + var packedPk [PublicKeySize]byte + pk.Pack(&packedPk) + + // tr = CRH(ρ ‖ t1) = CRH(pk) + h.Reset() + _, _ = h.Write(packedPk[:]) + _, _ = h.Read(sk.tr[:]) + + // Finish cache of public key + pk.tr = &sk.tr + + return &pk, &sk +} + +// Computes t0 and t1 from sk.s1h, sk.s2 and sk.A. +func (sk *PrivateKey) computeT0andT1(t0, t1 *VecK) { + var t VecK + + // Set t to A s₁ + s₂ + for i := 0; i < K; i++ { + PolyDotHat(&t[i], &sk.A[i], &sk.s1h) + t[i].ReduceLe2Q() + t[i].InvNTT() + } + t.Add(&t, &sk.s2) + t.Normalize() + + // Compute t₀, t₁ = Power2Round(t) + t.Power2Round(t0, t1) +} + +// Verify checks whether the given signature by pk on msg is valid. +// +// For Dilithium this is the top-level verification function. +// In ML-DSA, this is ML-DSA.Verify_internal. +func Verify(pk *PublicKey, msg func(io.Writer), signature []byte) bool { + var sig unpackedSignature + var mu [64]byte + var zh VecL + var Az, Az2dct1, w1 VecK + var ch common.Poly + var cp [CTildeSize]byte + var w1Packed [PolyW1Size * K]byte + + // Note that Unpack() checked whether ‖z‖_∞ < γ₁ - β + // and ensured that there at most ω ones in pk.hint. + if !sig.Unpack(signature) { + return false + } + + // μ = CRH(tr ‖ msg) + h := sha3.NewShake256() + _, _ = h.Write(pk.tr[:]) + msg(&h) + _, _ = h.Read(mu[:]) + + // Compute Az + zh = sig.z + zh.NTT() + + for i := 0; i < K; i++ { + PolyDotHat(&Az[i], &pk.A[i], &zh) + } + + // Next, we compute Az - 2ᵈ·c·t₁. + // Note that the coefficients of t₁ are bounded by 256 = 2⁹, + // so the coefficients of Az2dct1 will bounded by 2⁹⁺ᵈ = 2²³ < 2q, + // which is small enough for NTT(). + Az2dct1.MulBy2toD(&pk.t1) + Az2dct1.NTT() + PolyDeriveUniformBall(&ch, sig.c[:]) + ch.NTT() + for i := 0; i < K; i++ { + Az2dct1[i].MulHat(&Az2dct1[i], &ch) + } + Az2dct1.Sub(&Az, &Az2dct1) + Az2dct1.ReduceLe2Q() + Az2dct1.InvNTT() + Az2dct1.NormalizeAssumingLe2Q() + + // UseHint(pk.hint, Az - 2ᵈ·c·t₁) + // = UseHint(pk.hint, w - c·s₂ + c·t₀) + // = UseHint(pk.hint, r + c·t₀) + // = r₁ = w₁. + w1.UseHint(&Az2dct1, &sig.hint) + w1.PackW1(w1Packed[:]) + + // c' = H(μ, w₁) + h.Reset() + _, _ = h.Write(mu[:]) + _, _ = h.Write(w1Packed[:]) + _, _ = h.Read(cp[:]) + + return sig.c == cp +} + +// SignTo signs the given message and writes the signature into signature. +// +// For Dilithium this is the top-level signing function. For ML-DSA +// this is ML-DSA.Sign_internal. +// +//nolint:funlen +func SignTo(sk *PrivateKey, msg func(io.Writer), rnd [32]byte, signature []byte) { + var mu, rhop [64]byte + var w1Packed [PolyW1Size * K]byte + var y, yh VecL + var w, w0, w1, w0mcs2, ct0, w0mcs2pct0 VecK + var ch common.Poly + var yNonce uint16 + var sig unpackedSignature + + if len(signature) < SignatureSize { + panic("Signature does not fit in that byteslice") + } + + // μ = CRH(tr ‖ msg) + h := sha3.NewShake256() + _, _ = h.Write(sk.tr[:]) + msg(&h) + _, _ = h.Read(mu[:]) + + // ρ' = CRH(key ‖ μ) + h.Reset() + _, _ = h.Write(sk.key[:]) + if NIST { + _, _ = h.Write(rnd[:]) + } + _, _ = h.Write(mu[:]) + _, _ = h.Read(rhop[:]) + + // Main rejection loop + attempt := 0 + for { + attempt++ + if attempt >= 576 { + // Depending on the mode, one try has a chance between 1/7 and 1/4 + // of succeeding. Thus it is safe to say that 576 iterations + // are enough as (6/7)⁵⁷⁶ < 2⁻¹²⁸. + panic("This should only happen 1 in 2^{128}: something is wrong.") + } + + // y = ExpandMask(ρ', key) + VecLDeriveUniformLeGamma1(&y, &rhop, yNonce) + yNonce += uint16(L) + + // Set w to A y + yh = y + yh.NTT() + for i := 0; i < K; i++ { + PolyDotHat(&w[i], &sk.A[i], &yh) + w[i].ReduceLe2Q() + w[i].InvNTT() + } + + // Decompose w into w₀ and w₁ + w.NormalizeAssumingLe2Q() + w.Decompose(&w0, &w1) + + // c~ = H(μ ‖ w₁) + w1.PackW1(w1Packed[:]) + h.Reset() + _, _ = h.Write(mu[:]) + _, _ = h.Write(w1Packed[:]) + _, _ = h.Read(sig.c[:]) + + PolyDeriveUniformBall(&ch, sig.c[:]) + ch.NTT() + + // Ensure ‖ w₀ - c·s2 ‖_∞ < γ₂ - β. + // + // By Lemma 3 of the specification this is equivalent to checking that + // both ‖ r₀ ‖_∞ < γ₂ - β and r₁ = w₁, for the decomposition + // w - c·s₂ = r₁ α + r₀ as computed by decompose(). + // See also §4.1 of the specification. + for i := 0; i < K; i++ { + w0mcs2[i].MulHat(&ch, &sk.s2h[i]) + w0mcs2[i].InvNTT() + } + w0mcs2.Sub(&w0, &w0mcs2) + w0mcs2.Normalize() + + if w0mcs2.Exceeds(Gamma2 - Beta) { + continue + } + + // z = y + c·s₁ + for i := 0; i < L; i++ { + sig.z[i].MulHat(&ch, &sk.s1h[i]) + sig.z[i].InvNTT() + } + sig.z.Add(&sig.z, &y) + sig.z.Normalize() + + // Ensure ‖z‖_∞ < γ₁ - β + if sig.z.Exceeds(Gamma1 - Beta) { + continue + } + + // Compute c·t₀ + for i := 0; i < K; i++ { + ct0[i].MulHat(&ch, &sk.t0h[i]) + ct0[i].InvNTT() + } + ct0.NormalizeAssumingLe2Q() + + // Ensure ‖c·t₀‖_∞ < γ₂. + if ct0.Exceeds(Gamma2) { + continue + } + + // Create the hint to be able to reconstruct w₁ from w - c·s₂ + c·t0. + // Note that we're not using makeHint() in the obvious way as we + // do not know whether ‖ sc·s₂ - c·t₀ ‖_∞ < γ₂. Instead we note + // that our makeHint() is actually the same as a makeHint for a + // different decomposition: + // + // Earlier we ensured indirectly with a check that r₁ = w₁ where + // r = w - c·s₂. Hence r₀ = r - r₁ α = w - c·s₂ - w₁ α = w₀ - c·s₂. + // Thus MakeHint(w₀ - c·s₂ + c·t₀, w₁) = MakeHint(r0 + c·t₀, r₁) + // and UseHint(w - c·s₂ + c·t₀, w₁) = UseHint(r + c·t₀, r₁). + // As we just ensured that ‖ c·t₀ ‖_∞ < γ₂ our usage is correct. + w0mcs2pct0.Add(&w0mcs2, &ct0) + w0mcs2pct0.NormalizeAssumingLe2Q() + hintPop := sig.hint.MakeHint(&w0mcs2pct0, &w1) + if hintPop > Omega { + continue + } + + break + } + + sig.Pack(signature[:]) +} + +// Computes the public key corresponding to this private key. +func (sk *PrivateKey) Public() *PublicKey { + var t0 VecK + pk := &PublicKey{ + rho: sk.rho, + A: &sk.A, + tr: &sk.tr, + } + sk.computeT0andT1(&t0, &pk.t1) + pk.t1.PackT1(pk.t1p[:]) + return pk +} + +// Equal returns whether the two public keys are equal +func (pk *PublicKey) Equal(other *PublicKey) bool { + return pk.rho == other.rho && pk.t1 == other.t1 +} + +// Equal returns whether the two private keys are equal +func (sk *PrivateKey) Equal(other *PrivateKey) bool { + ret := (subtle.ConstantTimeCompare(sk.rho[:], other.rho[:]) & + subtle.ConstantTimeCompare(sk.key[:], other.key[:]) & + subtle.ConstantTimeCompare(sk.tr[:], other.tr[:])) + + acc := uint32(0) + for i := 0; i < L; i++ { + for j := 0; j < common.N; j++ { + acc |= sk.s1[i][j] ^ other.s1[i][j] + } + } + for i := 0; i < K; i++ { + for j := 0; j < common.N; j++ { + acc |= sk.s2[i][j] ^ other.s2[i][j] + acc |= sk.t0[i][j] ^ other.t0[i][j] + } + } + return (ret & subtle.ConstantTimeEq(int32(acc), 0)) == 1 +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/mat.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/mat.go new file mode 100644 index 0000000..ceaf634 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/mat.go @@ -0,0 +1,59 @@ +// Code generated from mode3/internal/mat.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// A k by l matrix of polynomials. +type Mat [K]VecL + +// Expands the given seed to a complete matrix. +// +// This function is called ExpandA in the specification. +func (m *Mat) Derive(seed *[32]byte) { + if !DeriveX4Available { + for i := uint16(0); i < K; i++ { + for j := uint16(0); j < L; j++ { + PolyDeriveUniform(&m[i][j], seed, (i<<8)+j) + } + } + return + } + + idx := 0 + var nonces [4]uint16 + var ps [4]*common.Poly + for i := uint16(0); i < K; i++ { + for j := uint16(0); j < L; j++ { + nonces[idx] = (i << 8) + j + ps[idx] = &m[i][j] + idx++ + if idx == 4 { + idx = 0 + PolyDeriveUniformX4(ps, seed, nonces) + } + } + } + if idx != 0 { + for i := idx; i < 4; i++ { + ps[i] = nil + } + PolyDeriveUniformX4(ps, seed, nonces) + } +} + +// Set p to the inner product of a and b using pointwise multiplication. +// +// Assumes a and b are in Montgomery form and their coefficients are +// pairwise sufficiently small to multiply, see Poly.MulHat(). Resulting +// coefficients are bounded by 2Lq. +func PolyDotHat(p *common.Poly, a, b *VecL) { + var t common.Poly + *p = common.Poly{} // zero p + for i := 0; i < L; i++ { + t.MulHat(&a[i], &b[i]) + p.Add(&t, p) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/pack.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/pack.go new file mode 100644 index 0000000..1854b41 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/pack.go @@ -0,0 +1,270 @@ +// Code generated from mode3/internal/pack.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// Writes p with norm less than or equal η into buf, which must be of +// size PolyLeqEtaSize. +// +// Assumes coefficients of p are not normalized, but in [q-η,q+η]. +func PolyPackLeqEta(p *common.Poly, buf []byte) { + if DoubleEtaBits == 4 { // compiler eliminates branch + j := 0 + for i := 0; i < PolyLeqEtaSize; i++ { + buf[i] = (byte(common.Q+Eta-p[j]) | + byte(common.Q+Eta-p[j+1])<<4) + j += 2 + } + } else if DoubleEtaBits == 3 { + j := 0 + for i := 0; i < PolyLeqEtaSize; i += 3 { + buf[i] = (byte(common.Q+Eta-p[j]) | + (byte(common.Q+Eta-p[j+1]) << 3) | + (byte(common.Q+Eta-p[j+2]) << 6)) + buf[i+1] = ((byte(common.Q+Eta-p[j+2]) >> 2) | + (byte(common.Q+Eta-p[j+3]) << 1) | + (byte(common.Q+Eta-p[j+4]) << 4) | + (byte(common.Q+Eta-p[j+5]) << 7)) + buf[i+2] = ((byte(common.Q+Eta-p[j+5]) >> 1) | + (byte(common.Q+Eta-p[j+6]) << 2) | + (byte(common.Q+Eta-p[j+7]) << 5)) + j += 8 + } + } else { + panic("eta not supported") + } +} + +// Sets p to the polynomial of norm less than or equal η encoded in the +// given buffer of size PolyLeqEtaSize. +// +// Output coefficients of p are not normalized, but in [q-η,q+η] provided +// buf was created using PackLeqEta. +// +// Beware, for arbitrary buf the coefficients of p might end up in +// the interval [q-2^b,q+2^b] where b is the least b with η≤2^b. +func PolyUnpackLeqEta(p *common.Poly, buf []byte) { + if DoubleEtaBits == 4 { // compiler eliminates branch + j := 0 + for i := 0; i < PolyLeqEtaSize; i++ { + p[j] = common.Q + Eta - uint32(buf[i]&15) + p[j+1] = common.Q + Eta - uint32(buf[i]>>4) + j += 2 + } + } else if DoubleEtaBits == 3 { + j := 0 + for i := 0; i < PolyLeqEtaSize; i += 3 { + p[j] = common.Q + Eta - uint32(buf[i]&7) + p[j+1] = common.Q + Eta - uint32((buf[i]>>3)&7) + p[j+2] = common.Q + Eta - uint32((buf[i]>>6)|((buf[i+1]<<2)&7)) + p[j+3] = common.Q + Eta - uint32((buf[i+1]>>1)&7) + p[j+4] = common.Q + Eta - uint32((buf[i+1]>>4)&7) + p[j+5] = common.Q + Eta - uint32((buf[i+1]>>7)|((buf[i+2]<<1)&7)) + p[j+6] = common.Q + Eta - uint32((buf[i+2]>>2)&7) + p[j+7] = common.Q + Eta - uint32((buf[i+2]>>5)&7) + j += 8 + } + } else { + panic("eta not supported") + } +} + +// Writes v with coefficients in {0, 1} of which at most ω non-zero +// to buf, which must have length ω+k. +func (v *VecK) PackHint(buf []byte) { + // The packed hint starts with the indices of the non-zero coefficients + // For instance: + // + // (x⁵⁶ + x¹⁰⁰, x²⁵⁵, 0, x² + x²³, x¹) + // + // Yields + // + // 56, 100, 255, 2, 23, 1 + // + // Then we pad with zeroes until we have a list of ω items: + // // 56, 100, 255, 2, 23, 1, 0, 0, ..., 0 + // + // Then we finish with a list of the switch-over-indices in this + // list between polynomials, so: + // + // 56, 100, 255, 2, 23, 1, 0, 0, ..., 0, 2, 3, 3, 5, 6 + + off := uint8(0) + for i := 0; i < K; i++ { + for j := uint16(0); j < common.N; j++ { + if v[i][j] != 0 { + buf[off] = uint8(j) + off++ + } + } + buf[Omega+i] = off + } + for ; off < Omega; off++ { + buf[off] = 0 + } +} + +// Sets v to the vector encoded using VecK.PackHint() +// +// Returns whether unpacking was successful. +func (v *VecK) UnpackHint(buf []byte) bool { + // A priori, there would be several reasonable ways to encode the same + // hint vector. We take care to only allow only one encoding, to ensure + // "strong unforgeability". + // + // See PackHint() source for description of the encoding. + *v = VecK{} // zero v + prevSOP := uint8(0) // previous switch-over-point + for i := 0; i < K; i++ { + SOP := buf[Omega+i] + if SOP < prevSOP || SOP > Omega { + return false // ensures switch-over-points are increasing + } + for j := prevSOP; j < SOP; j++ { + if j > prevSOP && buf[j] <= buf[j-1] { + return false // ensures indices are increasing (within a poly) + } + v[i][buf[j]] = 1 + } + prevSOP = SOP + } + for j := prevSOP; j < Omega; j++ { + if buf[j] != 0 { + return false // ensures padding indices are zero + } + } + + return true +} + +// Sets p to the polynomial packed into buf by PolyPackLeGamma1. +// +// p will be normalized. +func PolyUnpackLeGamma1(p *common.Poly, buf []byte) { + if Gamma1Bits == 17 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 9 { + p0 := uint32(buf[i]) | (uint32(buf[i+1]) << 8) | + (uint32(buf[i+2]&0x3) << 16) + p1 := uint32(buf[i+2]>>2) | (uint32(buf[i+3]) << 6) | + (uint32(buf[i+4]&0xf) << 14) + p2 := uint32(buf[i+4]>>4) | (uint32(buf[i+5]) << 4) | + (uint32(buf[i+6]&0x3f) << 12) + p3 := uint32(buf[i+6]>>6) | (uint32(buf[i+7]) << 2) | + (uint32(buf[i+8]) << 10) + + // coefficients in [0,…,2γ₁) + p0 = Gamma1 - p0 // (-γ₁,…,γ₁] + p1 = Gamma1 - p1 + p2 = Gamma1 - p2 + p3 = Gamma1 - p3 + + p0 += uint32(int32(p0)>>31) & common.Q // normalize + p1 += uint32(int32(p1)>>31) & common.Q + p2 += uint32(int32(p2)>>31) & common.Q + p3 += uint32(int32(p3)>>31) & common.Q + + p[j] = p0 + p[j+1] = p1 + p[j+2] = p2 + p[j+3] = p3 + + j += 4 + } + } else if Gamma1Bits == 19 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 5 { + p0 := uint32(buf[i]) | (uint32(buf[i+1]) << 8) | + (uint32(buf[i+2]&0xf) << 16) + p1 := uint32(buf[i+2]>>4) | (uint32(buf[i+3]) << 4) | + (uint32(buf[i+4]) << 12) + + p0 = Gamma1 - p0 + p1 = Gamma1 - p1 + + p0 += uint32(int32(p0)>>31) & common.Q + p1 += uint32(int32(p1)>>31) & common.Q + + p[j] = p0 + p[j+1] = p1 + + j += 2 + } + } else { + panic("γ₁ not supported") + } +} + +// Writes p whose coefficients are in (-γ₁,γ₁] into buf +// which has to be of length PolyLeGamma1Size. +// +// Assumes p is normalized. +func PolyPackLeGamma1(p *common.Poly, buf []byte) { + if Gamma1Bits == 17 { + j := 0 + // coefficients in [0,…,γ₁] ∪ (q-γ₁,…,q) + for i := 0; i < PolyLeGamma1Size; i += 9 { + p0 := Gamma1 - p[j] // [0,…,γ₁] ∪ (γ₁-q,…,2γ₁-q) + p0 += uint32(int32(p0)>>31) & common.Q // [0,…,2γ₁) + p1 := Gamma1 - p[j+1] + p1 += uint32(int32(p1)>>31) & common.Q + p2 := Gamma1 - p[j+2] + p2 += uint32(int32(p2)>>31) & common.Q + p3 := Gamma1 - p[j+3] + p3 += uint32(int32(p3)>>31) & common.Q + + buf[i+0] = byte(p0) + buf[i+1] = byte(p0 >> 8) + buf[i+2] = byte(p0>>16) | byte(p1<<2) + buf[i+3] = byte(p1 >> 6) + buf[i+4] = byte(p1>>14) | byte(p2<<4) + buf[i+5] = byte(p2 >> 4) + buf[i+6] = byte(p2>>12) | byte(p3<<6) + buf[i+7] = byte(p3 >> 2) + buf[i+8] = byte(p3 >> 10) + + j += 4 + } + } else if Gamma1Bits == 19 { + j := 0 + for i := 0; i < PolyLeGamma1Size; i += 5 { + // Coefficients are in [0, γ₁] ∪ (Q-γ₁, Q) + p0 := Gamma1 - p[j] + p0 += uint32(int32(p0)>>31) & common.Q + p1 := Gamma1 - p[j+1] + p1 += uint32(int32(p1)>>31) & common.Q + + buf[i+0] = byte(p0) + buf[i+1] = byte(p0 >> 8) + buf[i+2] = byte(p0>>16) | byte(p1<<4) + buf[i+3] = byte(p1 >> 4) + buf[i+4] = byte(p1 >> 12) + + j += 2 + } + } else { + panic("γ₁ not supported") + } +} + +// Pack w₁ into buf, which must be of length PolyW1Size. +// +// Assumes w₁ is normalized. +func PolyPackW1(p *common.Poly, buf []byte) { + if Gamma1Bits == 19 { + p.PackLe16(buf) + } else if Gamma1Bits == 17 { + j := 0 + for i := 0; i < PolyW1Size; i += 3 { + buf[i] = byte(p[j]) | byte(p[j+1]<<6) + buf[i+1] = byte(p[j+1]>>2) | byte(p[j+2]<<4) + buf[i+2] = byte(p[j+2]>>4) | byte(p[j+3]<<2) + j += 4 + } + } else { + panic("unsupported γ₁") + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/params.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/params.go new file mode 100644 index 0000000..b5dc669 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/params.go @@ -0,0 +1,18 @@ +// Code generated from params.templ.go. DO NOT EDIT. + +package internal + +const ( + Name = "ML-DSA-87" + K = 8 + L = 7 + Eta = 2 + DoubleEtaBits = 3 + Omega = 75 + Tau = 60 + Gamma1Bits = 19 + Gamma2 = 261888 + NIST = true + TRSize = 64 + CTildeSize = 64 +) diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/rounding.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/rounding.go new file mode 100644 index 0000000..58123c0 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/rounding.go @@ -0,0 +1,142 @@ +// Code generated from mode3/internal/rounding.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// Splits 0 ≤ a < q into a₀ and a₁ with a = a₁*α + a₀ with -α/2 < a₀ ≤ α/2, +// except for when we would have a₁ = (q-1)/α in which case a₁=0 is taken +// and -α/2 ≤ a₀ < 0. Returns a₀ + q. Note 0 ≤ a₁ < (q-1)/α. +// Recall α = 2γ₂. +func decompose(a uint32) (a0plusQ, a1 uint32) { + // a₁ = ⌈a / 128⌉ + a1 = (a + 127) >> 7 + + if Alpha == 523776 { + // 1025/2²² is close enough to 1/4092 so that a₁ + // becomes a/α rounded down. + a1 = ((a1*1025 + (1 << 21)) >> 22) + + // For the corner-case a₁ = (q-1)/α = 16, we have to set a₁=0. + a1 &= 15 + } else if Alpha == 190464 { + // 1488/2²⁴ is close enough to 1/1488 so that a₁ + // becomes a/α rounded down. + a1 = ((a1 * 11275) + (1 << 23)) >> 24 + + // For the corner-case a₁ = (q-1)/α = 44, we have to set a₁=0. + a1 ^= uint32(int32(43-a1)>>31) & a1 + } else { + panic("unsupported α") + } + + a0plusQ = a - a1*Alpha + + // In the corner-case, when we set a₁=0, we will incorrectly + // have a₀ > (q-1)/2 and we'll need to subtract q. As we + // return a₀ + q, that comes down to adding q if a₀ < (q-1)/2. + a0plusQ += uint32(int32(a0plusQ-(common.Q-1)/2)>>31) & common.Q + + return +} + +// Assume 0 ≤ r, f < Q with ‖f‖_∞ ≤ α/2. Decompose r as r = r1*α + r0 as +// computed by decompose(). Write r' := r - f (mod Q). Now, decompose +// r'=r-f again as r' = r'1*α + r'0 using decompose(). As f is small, we +// have r'1 = r1 + h, where h ∈ {-1, 0, 1}. makeHint() computes |h| +// given z0 := r0 - f (mod Q) and r1. With |h|, which is called the hint, +// we can reconstruct r1 using only r' = r - f, which is done by useHint(). +// To wit: +// +// useHint( r - f, makeHint( r0 - f, r1 ) ) = r1. +// +// Assumes 0 ≤ z0 < Q. +func makeHint(z0, r1 uint32) uint32 { + // If -α/2 < r0 - f ≤ α/2, then r1*α + r0 - f is a valid decomposition of r' + // with the restrictions of decompose() and so r'1 = r1. So the hint + // should be 0. This is covered by the first two inequalities. + // There is one other case: if r0 - f = -α/2, then r1*α + r0 - f is also + // a valid decomposition if r1 = 0. In the other cases a one is carried + // and the hint should be 1. + if z0 <= Gamma2 || z0 > common.Q-Gamma2 || (z0 == common.Q-Gamma2 && r1 == 0) { + return 0 + } + return 1 +} + +// Uses the hint created by makeHint() to reconstruct r1 from r'=r-f; see +// documentation of makeHint() for context. +// Assumes 0 ≤ r' < Q. +func useHint(rp uint32, hint uint32) uint32 { + rp0plusQ, rp1 := decompose(rp) + if hint == 0 { + return rp1 + } + if rp0plusQ > common.Q { + return (rp1 + 1) & 15 + } + return (rp1 - 1) & 15 +} + +// Sets p to the hint polynomial for p0 the modified low bits and p1 +// the unmodified high bits --- see makeHint(). +// +// Returns the number of ones in the hint polynomial. +func PolyMakeHint(p, p0, p1 *common.Poly) (pop uint32) { + for i := 0; i < common.N; i++ { + h := makeHint(p0[i], p1[i]) + pop += h + p[i] = h + } + return +} + +// Computes corrections to the high bits of the polynomial q according +// to the hints in h and sets p to the corrected high bits. Returns p. +func PolyUseHint(p, q, hint *common.Poly) { + var q0PlusQ common.Poly + + // See useHint() and makeHint() for an explanation. We reimplement it + // here so that we can call Poly.Decompose(), which might be way faster + // than calling decompose() in a loop (for instance when having AVX2.) + + PolyDecompose(q, &q0PlusQ, p) + + for i := 0; i < common.N; i++ { + if hint[i] == 0 { + continue + } + if Gamma2 == 261888 { + if q0PlusQ[i] > common.Q { + p[i] = (p[i] + 1) & 15 + } else { + p[i] = (p[i] - 1) & 15 + } + } else if Gamma2 == 95232 { + if q0PlusQ[i] > common.Q { + if p[i] == 43 { + p[i] = 0 + } else { + p[i]++ + } + } else { + if p[i] == 0 { + p[i] = 43 + } else { + p[i]-- + } + } + } else { + panic("unsupported γ₂") + } + } +} + +// Splits each of the coefficients of p using decompose. +func PolyDecompose(p, p0PlusQ, p1 *common.Poly) { + for i := 0; i < common.N; i++ { + p0PlusQ[i], p1[i] = decompose(p[i]) + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/sample.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/sample.go new file mode 100644 index 0000000..b37370a --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/sample.go @@ -0,0 +1,339 @@ +// Code generated from mode3/internal/sample.go by gen.go + +package internal + +import ( + "encoding/binary" + + "github.com/cloudflare/circl/internal/sha3" + common "github.com/cloudflare/circl/sign/internal/dilithium" + "github.com/cloudflare/circl/simd/keccakf1600" +) + +// DeriveX4Available indicates whether the system supports the quick fourway +// sampling variants like PolyDeriveUniformX4. +var DeriveX4Available = keccakf1600.IsEnabledX4() + +// For each i, sample ps[i] uniformly from the given seed and nonces[i]. +// ps[i] may be nil and is ignored in that case. +// +// Can only be called when DeriveX4Available is true. +func PolyDeriveUniformX4(ps [4]*common.Poly, seed *[32]byte, nonces [4]uint16) { + var perm keccakf1600.StateX4 + state := perm.Initialize(false) + + // Absorb the seed in the four states + for i := 0; i < 4; i++ { + v := binary.LittleEndian.Uint64(seed[8*i : 8*(i+1)]) + for j := 0; j < 4; j++ { + state[i*4+j] = v + } + } + + // Absorb the nonces, the SHAKE128 domain separator (0b1111), the + // start of the padding (0b...001) and the end of the padding 0b100... + // Recall that the rate of SHAKE128 is 168 --- i.e. 21 uint64s. + for j := 0; j < 4; j++ { + state[4*4+j] = uint64(nonces[j]) | (0x1f << 16) + state[20*4+j] = 0x80 << 56 + } + + var idx [4]int // indices into ps + for j := 0; j < 4; j++ { + if ps[j] == nil { + idx[j] = common.N // mark nil polynomial as completed + } + } + + done := false + for !done { + // Applies KeccaK-f[1600] to state to get the next 21 uint64s of each + // of the four SHAKE128 streams. + perm.Permute() + + done = true + + PolyLoop: + for j := 0; j < 4; j++ { + if idx[j] == common.N { + continue + } + for i := 0; i < 7; i++ { + var t [8]uint32 + t[0] = uint32(state[i*3*4+j] & 0x7fffff) + t[1] = uint32((state[i*3*4+j] >> 24) & 0x7fffff) + t[2] = uint32((state[i*3*4+j] >> 48) | + ((state[(i*3+1)*4+j] & 0x7f) << 16)) + t[3] = uint32((state[(i*3+1)*4+j] >> 8) & 0x7fffff) + t[4] = uint32((state[(i*3+1)*4+j] >> 32) & 0x7fffff) + t[5] = uint32((state[(i*3+1)*4+j] >> 56) | + ((state[(i*3+2)*4+j] & 0x7fff) << 8)) + t[6] = uint32((state[(i*3+2)*4+j] >> 16) & 0x7fffff) + t[7] = uint32((state[(i*3+2)*4+j] >> 40) & 0x7fffff) + + for k := 0; k < 8; k++ { + if t[k] < common.Q { + ps[j][idx[j]] = t[k] + idx[j]++ + if idx[j] == common.N { + continue PolyLoop + } + } + } + } + done = false + } + } +} + +// Sample p uniformly from the given seed and nonce. +// +// p will be normalized. +func PolyDeriveUniform(p *common.Poly, seed *[32]byte, nonce uint16) { + var i, length int + var buf [12 * 16]byte // fits 168B SHAKE-128 rate + + length = 168 + + sample := func() { + // Note that 3 divides into 168 and 12*16, so we use up buf completely. + for j := 0; j < length && i < common.N; j += 3 { + t := (uint32(buf[j]) | (uint32(buf[j+1]) << 8) | + (uint32(buf[j+2]) << 16)) & 0x7fffff + + // We use rejection sampling + if t < common.Q { + p[i] = t + i++ + } + } + } + + var iv [32 + 2]byte // 32 byte seed + uint16 nonce + h := sha3.NewShake128() + copy(iv[:32], seed[:]) + iv[32] = uint8(nonce) + iv[33] = uint8(nonce >> 8) + _, _ = h.Write(iv[:]) + + for i < common.N { + _, _ = h.Read(buf[:168]) + sample() + } +} + +// Sample p uniformly with coefficients of norm less than or equal η, +// using the given seed and nonce. +// +// p will not be normalized, but will have coefficients in [q-η,q+η]. +func PolyDeriveUniformLeqEta(p *common.Poly, seed *[64]byte, nonce uint16) { + // Assumes 2 < η < 8. + var i, length int + var buf [9 * 16]byte // fits 136B SHAKE-256 rate + + length = 136 + + sample := func() { + // We use rejection sampling + for j := 0; j < length && i < common.N; j++ { + t1 := uint32(buf[j]) & 15 + t2 := uint32(buf[j]) >> 4 + if Eta == 2 { // branch is eliminated by compiler + if t1 <= 14 { + t1 -= ((205 * t1) >> 10) * 5 // reduce mod 5 + p[i] = common.Q + Eta - t1 + i++ + } + if t2 <= 14 && i < common.N { + t2 -= ((205 * t2) >> 10) * 5 // reduce mod 5 + p[i] = common.Q + Eta - t2 + i++ + } + } else if Eta == 4 { + if t1 <= 2*Eta { + p[i] = common.Q + Eta - t1 + i++ + } + if t2 <= 2*Eta && i < common.N { + p[i] = common.Q + Eta - t2 + i++ + } + } else { + panic("unsupported η") + } + } + } + + var iv [64 + 2]byte // 64 byte seed + uint16 nonce + + h := sha3.NewShake256() + copy(iv[:64], seed[:]) + iv[64] = uint8(nonce) + iv[65] = uint8(nonce >> 8) + + // 136 is SHAKE-256 rate + _, _ = h.Write(iv[:]) + + for i < common.N { + _, _ = h.Read(buf[:136]) + sample() + } +} + +// Sample v[i] uniformly with coefficients in (-γ₁,…,γ₁] using the +// given seed and nonce+i +// +// p will be normalized. +func VecLDeriveUniformLeGamma1(v *VecL, seed *[64]byte, nonce uint16) { + for i := 0; i < L; i++ { + PolyDeriveUniformLeGamma1(&v[i], seed, nonce+uint16(i)) + } +} + +// Sample p uniformly with coefficients in (-γ₁,…,γK1s] using the +// given seed and nonce. +// +// p will be normalized. +func PolyDeriveUniformLeGamma1(p *common.Poly, seed *[64]byte, nonce uint16) { + var buf [PolyLeGamma1Size]byte + + var iv [66]byte + h := sha3.NewShake256() + copy(iv[:64], seed[:]) + iv[64] = uint8(nonce) + iv[65] = uint8(nonce >> 8) + _, _ = h.Write(iv[:]) + _, _ = h.Read(buf[:]) + + PolyUnpackLeGamma1(p, buf[:]) +} + +// For each i, sample ps[i] uniformly with τ non-zero coefficients in {q-1,1} +// using the given seed and w1[i]. ps[i] may be nil and is ignored +// in that case. ps[i] will be normalized. +// +// Can only be called when DeriveX4Available is true. +// +// This function is currently not used (yet). +func PolyDeriveUniformBallX4(ps [4]*common.Poly, seed []byte) { + var perm keccakf1600.StateX4 + state := perm.Initialize(false) + + // Absorb the seed in the four states + for i := 0; i < CTildeSize/8; i++ { + v := binary.LittleEndian.Uint64(seed[8*i : 8*(i+1)]) + for j := 0; j < 4; j++ { + state[i*4+j] = v + } + } + + // SHAKE256 domain separator and padding + for j := 0; j < 4; j++ { + state[(CTildeSize/8)*4+j] ^= 0x1f + state[16*4+j] ^= 0x80 << 56 + } + perm.Permute() + + var signs [4]uint64 + var idx [4]uint16 // indices into ps + + for j := 0; j < 4; j++ { + if ps[j] != nil { + signs[j] = state[j] + *ps[j] = common.Poly{} // zero ps[j] + idx[j] = common.N - Tau + } else { + idx[j] = common.N // mark as completed + } + } + + stateOffset := 1 + for { + done := true + + PolyLoop: + for j := 0; j < 4; j++ { + if idx[j] == common.N { + continue + } + + for i := stateOffset; i < 17; i++ { + var bs [8]byte + binary.LittleEndian.PutUint64(bs[:], state[4*i+j]) + for k := 0; k < 8; k++ { + b := uint16(bs[k]) + + if b > idx[j] { + continue + } + + ps[j][idx[j]] = ps[j][b] + ps[j][b] = 1 + // Takes least significant bit of signs and uses it for the sign. + // Note 1 ^ (1 | (Q-1)) = Q-1. + ps[j][b] ^= uint32((-(signs[j] & 1)) & (1 | (common.Q - 1))) + signs[j] >>= 1 + + idx[j]++ + if idx[j] == common.N { + continue PolyLoop + } + } + } + + done = false + } + + if done { + break + } + + perm.Permute() + stateOffset = 0 + } +} + +// Samples p uniformly with τ non-zero coefficients in {q-1,1}. +// +// The polynomial p will be normalized. +func PolyDeriveUniformBall(p *common.Poly, seed []byte) { + var buf [136]byte // SHAKE-256 rate is 136 + + h := sha3.NewShake256() + _, _ = h.Write(seed[:]) + _, _ = h.Read(buf[:]) + + // Essentially we generate a sequence of τ ones or minus ones, + // prepend 196 zeroes and shuffle the concatenation using the + // usual algorithm (Fisher--Yates.) + signs := binary.LittleEndian.Uint64(buf[:]) + bufOff := 8 // offset into buf + + *p = common.Poly{} // zero p + for i := uint16(common.N - Tau); i < common.N; i++ { + var b uint16 + + // Find location of where to move the new coefficient to using + // rejection sampling. + for { + if bufOff >= 136 { + _, _ = h.Read(buf[:]) + bufOff = 0 + } + + b = uint16(buf[bufOff]) + bufOff++ + + if b <= i { + break + } + } + + p[i] = p[b] + p[b] = 1 + // Takes least significant bit of signs and uses it for the sign. + // Note 1 ^ (1 | (Q-1)) = Q-1. + p[b] ^= uint32((-(signs & 1)) & (1 | (common.Q - 1))) + signs >>= 1 + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/vec.go b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/vec.go new file mode 100644 index 0000000..d07d3b2 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/mldsa/mldsa87/internal/vec.go @@ -0,0 +1,281 @@ +// Code generated from mode3/internal/vec.go by gen.go + +package internal + +import ( + common "github.com/cloudflare/circl/sign/internal/dilithium" +) + +// A vector of L polynomials. +type VecL [L]common.Poly + +// A vector of K polynomials. +type VecK [K]common.Poly + +// Normalize the polynomials in this vector. +func (v *VecL) Normalize() { + for i := 0; i < L; i++ { + v[i].Normalize() + } +} + +// Normalize the polynomials in this vector assuming their coefficients +// are already bounded by 2q. +func (v *VecL) NormalizeAssumingLe2Q() { + for i := 0; i < L; i++ { + v[i].NormalizeAssumingLe2Q() + } +} + +// Sets v to w + u. Does not normalize. +func (v *VecL) Add(w, u *VecL) { + for i := 0; i < L; i++ { + v[i].Add(&w[i], &u[i]) + } +} + +// Applies NTT componentwise. See Poly.NTT() for details. +func (v *VecL) NTT() { + for i := 0; i < L; i++ { + v[i].NTT() + } +} + +// Checks whether any of the coefficients exceeds the given bound in supnorm +// +// Requires the vector to be normalized. +func (v *VecL) Exceeds(bound uint32) bool { + for i := 0; i < L; i++ { + if v[i].Exceeds(bound) { + return true + } + } + return false +} + +// Applies Poly.Power2Round componentwise. +// +// Requires the vector to be normalized. +func (v *VecL) Power2Round(v0PlusQ, v1 *VecL) { + for i := 0; i < L; i++ { + v[i].Power2Round(&v0PlusQ[i], &v1[i]) + } +} + +// Applies Poly.Decompose componentwise. +// +// Requires the vector to be normalized. +func (v *VecL) Decompose(v0PlusQ, v1 *VecL) { + for i := 0; i < L; i++ { + PolyDecompose(&v[i], &v0PlusQ[i], &v1[i]) + } +} + +// Sequentially packs each polynomial using Poly.PackLeqEta(). +func (v *VecL) PackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyPackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sets v to the polynomials packed in buf using VecL.PackLeqEta(). +func (v *VecL) UnpackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyUnpackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sequentially packs each polynomial using PolyPackLeGamma1(). +func (v *VecL) PackLeGamma1(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyPackLeGamma1(&v[i], buf[offset:]) + offset += PolyLeGamma1Size + } +} + +// Sets v to the polynomials packed in buf using VecL.PackLeGamma1(). +func (v *VecL) UnpackLeGamma1(buf []byte) { + offset := 0 + for i := 0; i < L; i++ { + PolyUnpackLeGamma1(&v[i], buf[offset:]) + offset += PolyLeGamma1Size + } +} + +// Normalize the polynomials in this vector. +func (v *VecK) Normalize() { + for i := 0; i < K; i++ { + v[i].Normalize() + } +} + +// Normalize the polynomials in this vector assuming their coefficients +// are already bounded by 2q. +func (v *VecK) NormalizeAssumingLe2Q() { + for i := 0; i < K; i++ { + v[i].NormalizeAssumingLe2Q() + } +} + +// Sets v to w + u. Does not normalize. +func (v *VecK) Add(w, u *VecK) { + for i := 0; i < K; i++ { + v[i].Add(&w[i], &u[i]) + } +} + +// Checks whether any of the coefficients exceeds the given bound in supnorm +// +// Requires the vector to be normalized. +func (v *VecK) Exceeds(bound uint32) bool { + for i := 0; i < K; i++ { + if v[i].Exceeds(bound) { + return true + } + } + return false +} + +// Applies Poly.Power2Round componentwise. +// +// Requires the vector to be normalized. +func (v *VecK) Power2Round(v0PlusQ, v1 *VecK) { + for i := 0; i < K; i++ { + v[i].Power2Round(&v0PlusQ[i], &v1[i]) + } +} + +// Applies Poly.Decompose componentwise. +// +// Requires the vector to be normalized. +func (v *VecK) Decompose(v0PlusQ, v1 *VecK) { + for i := 0; i < K; i++ { + PolyDecompose(&v[i], &v0PlusQ[i], &v1[i]) + } +} + +// Sets v to the hint vector for v0 the modified low bits and v1 +// the unmodified high bits --- see makeHint(). +// +// Returns the number of ones in the hint vector. +func (v *VecK) MakeHint(v0, v1 *VecK) (pop uint32) { + for i := 0; i < K; i++ { + pop += PolyMakeHint(&v[i], &v0[i], &v1[i]) + } + return +} + +// Computes corrections to the high bits of the polynomials in the vector +// w using the hints in h and sets v to the corrected high bits. Returns v. +// See useHint(). +func (v *VecK) UseHint(q, hint *VecK) *VecK { + for i := 0; i < K; i++ { + PolyUseHint(&v[i], &q[i], &hint[i]) + } + return v +} + +// Sequentially packs each polynomial using Poly.PackT1(). +func (v *VecK) PackT1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].PackT1(buf[offset:]) + offset += common.PolyT1Size + } +} + +// Sets v to the vector packed into buf by PackT1(). +func (v *VecK) UnpackT1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].UnpackT1(buf[offset:]) + offset += common.PolyT1Size + } +} + +// Sequentially packs each polynomial using Poly.PackT0(). +func (v *VecK) PackT0(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].PackT0(buf[offset:]) + offset += common.PolyT0Size + } +} + +// Sets v to the vector packed into buf by PackT0(). +func (v *VecK) UnpackT0(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + v[i].UnpackT0(buf[offset:]) + offset += common.PolyT0Size + } +} + +// Sequentially packs each polynomial using Poly.PackLeqEta(). +func (v *VecK) PackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyPackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Sets v to the polynomials packed in buf using VecK.PackLeqEta(). +func (v *VecK) UnpackLeqEta(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyUnpackLeqEta(&v[i], buf[offset:]) + offset += PolyLeqEtaSize + } +} + +// Applies NTT componentwise. See Poly.NTT() for details. +func (v *VecK) NTT() { + for i := 0; i < K; i++ { + v[i].NTT() + } +} + +// Sequentially packs each polynomial using PolyPackW1(). +func (v *VecK) PackW1(buf []byte) { + offset := 0 + for i := 0; i < K; i++ { + PolyPackW1(&v[i], buf[offset:]) + offset += PolyW1Size + } +} + +// Sets v to a - b. +// +// Warning: assumes coefficients of the polynomials of b are less than 2q. +func (v *VecK) Sub(a, b *VecK) { + for i := 0; i < K; i++ { + v[i].Sub(&a[i], &b[i]) + } +} + +// Sets v to 2ᵈ w without reducing. +func (v *VecK) MulBy2toD(w *VecK) { + for i := 0; i < K; i++ { + v[i].MulBy2toD(&w[i]) + } +} + +// Applies InvNTT componentwise. See Poly.InvNTT() for details. +func (v *VecK) InvNTT() { + for i := 0; i < K; i++ { + v[i].InvNTT() + } +} + +// Applies Poly.ReduceLe2Q() componentwise. +func (v *VecK) ReduceLe2Q() { + for i := 0; i < K; i++ { + v[i].ReduceLe2Q() + } +} diff --git a/backend/vendor/github.com/cloudflare/circl/sign/schemes/schemes.go b/backend/vendor/github.com/cloudflare/circl/sign/schemes/schemes.go new file mode 100644 index 0000000..d01d8ca --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/schemes/schemes.go @@ -0,0 +1,59 @@ +// Package schemes contains a register of signature algorithms. +// +// Implemented schemes: +// +// Ed25519 +// Ed448 +// Ed25519-Dilithium2 +// Ed448-Dilithium3 +package schemes + +import ( + "strings" + + "github.com/cloudflare/circl/sign" + "github.com/cloudflare/circl/sign/ed25519" + "github.com/cloudflare/circl/sign/ed448" + "github.com/cloudflare/circl/sign/eddilithium2" + "github.com/cloudflare/circl/sign/eddilithium3" + + dilithium2 "github.com/cloudflare/circl/sign/dilithium/mode2" + dilithium3 "github.com/cloudflare/circl/sign/dilithium/mode3" + dilithium5 "github.com/cloudflare/circl/sign/dilithium/mode5" + "github.com/cloudflare/circl/sign/mldsa/mldsa44" + "github.com/cloudflare/circl/sign/mldsa/mldsa65" + "github.com/cloudflare/circl/sign/mldsa/mldsa87" +) + +var allSchemes = [...]sign.Scheme{ + ed25519.Scheme(), + ed448.Scheme(), + eddilithium2.Scheme(), + eddilithium3.Scheme(), + dilithium2.Scheme(), + dilithium3.Scheme(), + dilithium5.Scheme(), + mldsa44.Scheme(), + mldsa65.Scheme(), + mldsa87.Scheme(), +} + +var allSchemeNames map[string]sign.Scheme + +func init() { + allSchemeNames = make(map[string]sign.Scheme) + for _, scheme := range allSchemes { + allSchemeNames[strings.ToLower(scheme.Name())] = scheme + } +} + +// ByName returns the scheme with the given name and nil if it is not +// supported. +// +// Names are case insensitive. +func ByName(name string) sign.Scheme { + return allSchemeNames[strings.ToLower(name)] +} + +// All returns all signature schemes supported. +func All() []sign.Scheme { a := allSchemes; return a[:] } diff --git a/backend/vendor/github.com/cloudflare/circl/sign/sign.go b/backend/vendor/github.com/cloudflare/circl/sign/sign.go new file mode 100644 index 0000000..557d6f0 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/sign/sign.go @@ -0,0 +1,113 @@ +// Package sign provides unified interfaces for signature schemes. +// +// A register of schemes is available in the package +// +// github.com/cloudflare/circl/sign/schemes +package sign + +import ( + "crypto" + "encoding" + "errors" +) + +type SignatureOpts struct { + // If non-empty, includes the given context in the signature if supported + // and will cause an error during signing otherwise. + Context string +} + +// A public key is used to verify a signature set by the corresponding private +// key. +type PublicKey interface { + // Returns the signature scheme for this public key. + Scheme() Scheme + Equal(crypto.PublicKey) bool + encoding.BinaryMarshaler + crypto.PublicKey +} + +// A private key allows one to create signatures. +type PrivateKey interface { + // Returns the signature scheme for this private key. + Scheme() Scheme + Equal(crypto.PrivateKey) bool + // For compatibility with Go standard library + crypto.Signer + crypto.PrivateKey + encoding.BinaryMarshaler +} + +// A Scheme represents a specific instance of a signature scheme. +type Scheme interface { + // Name of the scheme. + Name() string + + // GenerateKey creates a new key-pair. + GenerateKey() (PublicKey, PrivateKey, error) + + // Creates a signature using the PrivateKey on the given message and + // returns the signature. opts are additional options which can be nil. + // + // Panics if key is nil or wrong type or opts context is not supported. + Sign(sk PrivateKey, message []byte, opts *SignatureOpts) []byte + + // Checks whether the given signature is a valid signature set by + // the private key corresponding to the given public key on the + // given message. opts are additional options which can be nil. + // + // Panics if key is nil or wrong type or opts context is not supported. + Verify(pk PublicKey, message []byte, signature []byte, opts *SignatureOpts) bool + + // Deterministically derives a keypair from a seed. If you're unsure, + // you're better off using GenerateKey(). + // + // Panics if seed is not of length SeedSize(). + DeriveKey(seed []byte) (PublicKey, PrivateKey) + + // Unmarshals a PublicKey from the provided buffer. + UnmarshalBinaryPublicKey([]byte) (PublicKey, error) + + // Unmarshals a PublicKey from the provided buffer. + UnmarshalBinaryPrivateKey([]byte) (PrivateKey, error) + + // Size of binary marshalled public keys. + PublicKeySize() int + + // Size of binary marshalled public keys. + PrivateKeySize() int + + // Size of signatures. + SignatureSize() int + + // Size of seeds. + SeedSize() int + + // Returns whether contexts are supported. + SupportsContext() bool +} + +var ( + // ErrTypeMismatch is the error used if types of, for instance, private + // and public keys don't match. + ErrTypeMismatch = errors.New("types mismatch") + + // ErrSeedSize is the error used if the provided seed is of the wrong + // size. + ErrSeedSize = errors.New("wrong seed size") + + // ErrPubKeySize is the error used if the provided public key is of + // the wrong size. + ErrPubKeySize = errors.New("wrong size for public key") + + // ErrPrivKeySize is the error used if the provided private key is of + // the wrong size. + ErrPrivKeySize = errors.New("wrong size for private key") + + // ErrContextNotSupported is the error used if a context is not + // supported. + ErrContextNotSupported = errors.New("context not supported") + + // ErrContextTooLong is the error used if the context string is too long. + ErrContextTooLong = errors.New("context string too long") +) diff --git a/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x.go b/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x.go new file mode 100644 index 0000000..20ac96f --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x.go @@ -0,0 +1,163 @@ +// Package keccakf1600 provides a two and four-way Keccak-f[1600] permutation in parallel. +// +// Keccak-f[1600] is the permutation underlying several algorithms such as +// Keccak, SHA3 and SHAKE. Running two or four permutations in parallel is +// useful in some scenarios like in hash-based signatures. +// +// # Limitations +// +// Note that not all the architectures support SIMD instructions. This package +// uses AVX2 instructions that are available in some AMD64 architectures +// and NEON instructions that are available in some ARM64 architectures. +// +// For those systems not supporting these, the package still provides the +// expected functionality by means of a generic and slow implementation. +// The recommendation is to beforehand verify IsEnabledX4() and IsEnabledX2() +// to determine if the current system supports the SIMD implementation. +package keccakf1600 + +import ( + "runtime" + "unsafe" + + "github.com/cloudflare/circl/internal/sha3" + "golang.org/x/sys/cpu" +) + +// StateX4 contains state for the four-way permutation including the four +// interleaved [25]uint64 buffers. Call Initialize() before use to initialize +// and get a pointer to the interleaved buffer. +type StateX4 struct { + // Go guarantees a to be aligned on 8 bytes, whereas we need it to be + // aligned on 32 bytes for bet performance. Thus we leave some headroom + // to be able to move the start of the state. + + // 4 x 25 uint64s for the interleaved states and three uint64s headroom + // to fix alignment. + a [103]uint64 + + // Offset into a that is 32 byte aligned. + offset int + + // If true, permute will use 12-round keccak instead of 24-round keccak + turbo bool +} + +// StateX2 contains state for the two-way permutation including the two +// interleaved [25]uint64 buffers. Call Initialize() before use to initialize +// and get a pointer to the interleaved buffer. +type StateX2 struct { + // Go guarantees a to be aligned on 8 bytes, whereas we need it to be + // aligned on 32 bytes for bet performance. Thus we leave some headroom + // to be able to move the start of the state. + + // 2 x 25 uint64s for the interleaved states and three uint64s headroom + // to fix alignment. + a [53]uint64 + + // Offset into a that is 32 byte aligned. + offset int + + // If true, permute will use 12-round keccak instead of 24-round keccak + turbo bool +} + +// IsEnabledX4 returns true if the architecture supports a four-way SIMD +// implementation provided in this package. +func IsEnabledX4() bool { return cpu.X86.HasAVX2 } + +// IsEnabledX2 returns true if the architecture supports a two-way SIMD +// implementation provided in this package. +func IsEnabledX2() bool { return enabledX2 } + +// Initialize the state and returns the buffer on which the four permutations +// will act: a uint64 slice of length 100. The first permutation will act +// on {a[0], a[4], ..., a[96]}, the second on {a[1], a[5], ..., a[97]}, etc. +// If turbo is true, applies 12-round variant instead of the usual 24. +func (s *StateX4) Initialize(turbo bool) []uint64 { + s.turbo = turbo + rp := unsafe.Pointer(&s.a[0]) + + // uint64s are always aligned by a multiple of 8. Compute the remainder + // of the address modulo 32 divided by 8. + rem := (int(uintptr(rp)&31) >> 3) + + if rem != 0 { + s.offset = 4 - rem + } + + // The slice we return will be aligned on 32 byte boundary. + return s.a[s.offset : s.offset+100] +} + +// Initialize the state and returns the buffer on which the two permutations +// will act: a uint64 slice of length 50. The first permutation will act +// on {a[0], a[2], ..., a[48]} and the second on {a[1], a[3], ..., a[49]}. +// If turbo is true, applies 12-round variant instead of the usual 24. +func (s *StateX2) Initialize(turbo bool) []uint64 { + s.turbo = turbo + rp := unsafe.Pointer(&s.a[0]) + + // uint64s are always aligned by a multiple of 8. Compute the remainder + // of the address modulo 32 divided by 8. + rem := (int(uintptr(rp)&31) >> 3) + + if rem != 0 { + s.offset = 4 - rem + } + + // The slice we return will be aligned on 32 byte boundary. + return s.a[s.offset : s.offset+50] +} + +// Permute performs the four parallel Keccak-f[1600]s interleaved on the slice +// returned from Initialize(). +func (s *StateX4) Permute() { + if IsEnabledX4() { + permuteSIMDx4(s.a[s.offset:], s.turbo) + } else { + permuteScalarX4(s.a[s.offset:], s.turbo) // A slower generic implementation. + } +} + +// Permute performs the two parallel Keccak-f[1600]s interleaved on the slice +// returned from Initialize(). +func (s *StateX2) Permute() { + if IsEnabledX2() { + permuteSIMDx2(s.a[s.offset:], s.turbo) + } else { + permuteScalarX2(s.a[s.offset:], s.turbo) // A slower generic implementation. + } +} + +func permuteScalarX4(a []uint64, turbo bool) { + var buf [25]uint64 + for i := 0; i < 4; i++ { + for j := 0; j < 25; j++ { + buf[j] = a[4*j+i] + } + sha3.KeccakF1600(&buf, turbo) + for j := 0; j < 25; j++ { + a[4*j+i] = buf[j] + } + } +} + +func permuteScalarX2(a []uint64, turbo bool) { + var buf [25]uint64 + for i := 0; i < 2; i++ { + for j := 0; j < 25; j++ { + buf[j] = a[2*j+i] + } + sha3.KeccakF1600(&buf, turbo) + for j := 0; j < 25; j++ { + a[2*j+i] = buf[j] + } + } +} + +var enabledX2 bool + +func init() { + enabledX2 = runtime.GOARCH == "arm64" && runtime.GOOS == "darwin" +} diff --git a/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x2_arm64.go b/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x2_arm64.go new file mode 100644 index 0000000..0cb9692 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x2_arm64.go @@ -0,0 +1,13 @@ +//go:build arm64 && go1.16 && !purego +// +build arm64,go1.16,!purego + +package keccakf1600 + +import "github.com/cloudflare/circl/internal/sha3" + +func permuteSIMDx2(state []uint64, turbo bool) { f1600x2ARM(&state[0], &sha3.RC, turbo) } + +func permuteSIMDx4(state []uint64, turbo bool) { permuteScalarX4(state, turbo) } + +//go:noescape +func f1600x2ARM(state *uint64, rc *[24]uint64, turbo bool) diff --git a/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x2_arm64.s b/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x2_arm64.s new file mode 100644 index 0000000..998aeca --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x2_arm64.s @@ -0,0 +1,136 @@ +// +build arm64,go1.16,!purego + +// Taken from https://github.com/bwesterb/armed-keccak + +#include "textflag.h" + +// func f1600x2ARM(state *uint64, rc *[24]uint64, turbo bool) +TEXT ·f1600x2ARM(SB), NOSPLIT, $0-17 + MOVD state+0(FP), R0 + MOVD rc+8(FP), R1 + MOVD R0, R2 + MOVD $24, R3 + + VLD1.P 64(R0), [ V0.B16, V1.B16, V2.B16, V3.B16] + VLD1.P 64(R0), [ V4.B16, V5.B16, V6.B16, V7.B16] + VLD1.P 64(R0), [ V8.B16, V9.B16, V10.B16, V11.B16] + VLD1.P 64(R0), [V12.B16, V13.B16, V14.B16, V15.B16] + VLD1.P 64(R0), [V16.B16, V17.B16, V18.B16, V19.B16] + VLD1.P 64(R0), [V20.B16, V21.B16, V22.B16, V23.B16] + VLD1.P (R0), [V24.B16] + + MOVBU turbo+16(FP), R4 + CBZ R4, loop + + SUB $12, R3, R3 + ADD $96, R1, R1 + +loop: + // Execute theta but without xorring into the state yet. + VEOR3 V10.B16, V5.B16, V0.B16, V25.B16 + VEOR3 V11.B16, V6.B16, V1.B16, V26.B16 + VEOR3 V12.B16, V7.B16, V2.B16, V27.B16 + VEOR3 V13.B16, V8.B16, V3.B16, V28.B16 + VEOR3 V14.B16, V9.B16, V4.B16, V29.B16 + + VEOR3 V20.B16, V15.B16, V25.B16, V25.B16 + VEOR3 V21.B16, V16.B16, V26.B16, V26.B16 + VEOR3 V22.B16, V17.B16, V27.B16, V27.B16 + VEOR3 V23.B16, V18.B16, V28.B16, V28.B16 + VEOR3 V24.B16, V19.B16, V29.B16, V29.B16 + + // Xor parities from step theta into the state at the same time as + // exeuting rho and pi. + VRAX1 V26.D2, V29.D2, V30.D2 + VRAX1 V29.D2, V27.D2, V29.D2 + VRAX1 V27.D2, V25.D2, V27.D2 + VRAX1 V25.D2, V28.D2, V25.D2 + VRAX1 V28.D2, V26.D2, V28.D2 + + VEOR V30.B16, V0.B16, V0.B16 + VMOV V1.B16, V31.B16 + + VXAR $20, V27.D2, V6.D2, V1.D2 + VXAR $44, V25.D2, V9.D2, V6.D2 + VXAR $3 , V28.D2, V22.D2, V9.D2 + VXAR $25, V25.D2, V14.D2, V22.D2 + VXAR $46, V30.D2, V20.D2, V14.D2 + VXAR $2 , V28.D2, V2.D2, V20.D2 + VXAR $21, V28.D2, V12.D2, V2.D2 + VXAR $39, V29.D2, V13.D2, V12.D2 + VXAR $56, V25.D2, V19.D2, V13.D2 + VXAR $8 , V29.D2, V23.D2, V19.D2 + VXAR $23, V30.D2, V15.D2, V23.D2 + VXAR $37, V25.D2, V4.D2, V15.D2 + VXAR $50, V25.D2, V24.D2, V4.D2 + VXAR $62, V27.D2, V21.D2, V24.D2 + VXAR $9 , V29.D2, V8.D2, V21.D2 + VXAR $19, V27.D2, V16.D2, V8.D2 + VXAR $28, V30.D2, V5.D2, V16.D2 + VXAR $36, V29.D2, V3.D2, V5.D2 + VXAR $43, V29.D2, V18.D2, V3.D2 + VXAR $49, V28.D2, V17.D2, V18.D2 + VXAR $54, V27.D2, V11.D2, V17.D2 + VXAR $58, V28.D2, V7.D2, V11.D2 + VXAR $61, V30.D2, V10.D2, V7.D2 + VXAR $63, V27.D2, V31.D2, V10.D2 + + // Chi + VBCAX V1.B16, V2.B16, V0.B16, V25.B16 + VBCAX V2.B16, V3.B16, V1.B16, V26.B16 + VBCAX V3.B16, V4.B16, V2.B16, V2.B16 + VBCAX V4.B16, V0.B16, V3.B16, V3.B16 + VBCAX V0.B16, V1.B16, V4.B16, V4.B16 + VMOV V25.B16, V0.B16 + VMOV V26.B16, V1.B16 + + VBCAX V6.B16, V7.B16, V5.B16, V25.B16 + VBCAX V7.B16, V8.B16, V6.B16, V26.B16 + VBCAX V8.B16, V9.B16, V7.B16, V7.B16 + VBCAX V9.B16, V5.B16, V8.B16, V8.B16 + VBCAX V5.B16, V6.B16, V9.B16, V9.B16 + VMOV V25.B16, V5.B16 + VMOV V26.B16, V6.B16 + + VBCAX V11.B16, V12.B16, V10.B16, V25.B16 + VBCAX V12.B16, V13.B16, V11.B16, V26.B16 + VBCAX V13.B16, V14.B16, V12.B16, V12.B16 + VBCAX V14.B16, V10.B16, V13.B16, V13.B16 + VBCAX V10.B16, V11.B16, V14.B16, V14.B16 + VMOV V25.B16, V10.B16 + VMOV V26.B16, V11.B16 + + VBCAX V16.B16, V17.B16, V15.B16, V25.B16 + VBCAX V17.B16, V18.B16, V16.B16, V26.B16 + VBCAX V18.B16, V19.B16, V17.B16, V17.B16 + VBCAX V19.B16, V15.B16, V18.B16, V18.B16 + VBCAX V15.B16, V16.B16, V19.B16, V19.B16 + VMOV V25.B16, V15.B16 + VMOV V26.B16, V16.B16 + + VBCAX V21.B16, V22.B16, V20.B16, V25.B16 + VBCAX V22.B16, V23.B16, V21.B16, V26.B16 + VBCAX V23.B16, V24.B16, V22.B16, V22.B16 + VBCAX V24.B16, V20.B16, V23.B16, V23.B16 + VBCAX V20.B16, V21.B16, V24.B16, V24.B16 + VMOV V25.B16, V20.B16 + VMOV V26.B16, V21.B16 + + // Iota + VLD1R.P 8(R1), [V25.D2] + VEOR V25.B16, V0.B16, V0.B16 + + SUBS $1, R3, R3 + CBNZ R3, loop + + MOVD R2, R0 + + VST1.P [ V0.B16, V1.B16, V2.B16, V3.B16], 64(R0) + VST1.P [ V4.B16, V5.B16, V6.B16, V7.B16], 64(R0) + VST1.P [ V8.B16, V9.B16, V10.B16, V11.B16], 64(R0) + VST1.P [V12.B16, V13.B16, V14.B16, V15.B16], 64(R0) + VST1.P [V16.B16, V17.B16, V18.B16, V19.B16], 64(R0) + VST1.P [V20.B16, V21.B16, V22.B16, V23.B16], 64(R0) + VST1.P [V24.B16], (R0) + + RET diff --git a/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x4_amd64.go b/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x4_amd64.go new file mode 100644 index 0000000..bf5b865 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x4_amd64.go @@ -0,0 +1,10 @@ +//go:build amd64 && !purego +// +build amd64,!purego + +package keccakf1600 + +import "github.com/cloudflare/circl/internal/sha3" + +func permuteSIMDx4(state []uint64, turbo bool) { f1600x4AVX2(&state[0], &sha3.RC, turbo) } + +func permuteSIMDx2(state []uint64, turbo bool) { permuteScalarX2(state, turbo) } diff --git a/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x4_amd64.s b/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x4_amd64.s new file mode 100644 index 0000000..67b6455 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x4_amd64.s @@ -0,0 +1,899 @@ +// Code generated by command: go run src.go -out ../../f1600x4_amd64.s -stubs ../../f1600x4stubs_amd64.go -pkg keccakf1600. DO NOT EDIT. + +//go:build amd64 && !purego + +#include "textflag.h" + +// func f1600x4AVX2(state *uint64, rc *[24]uint64, turbo bool) +// Requires: AVX, AVX2 +TEXT ·f1600x4AVX2(SB), NOSPLIT, $0-17 + MOVQ state+0(FP), AX + MOVQ rc+8(FP), CX + MOVQ $0x0000000000000006, DX + MOVBQZX turbo+16(FP), BX + TESTQ BX, BX + JZ loop + MOVQ $0x0000000000000003, DX + ADDQ $0x60, CX + +loop: + VMOVDQA (AX), Y0 + VMOVDQA 32(AX), Y1 + VMOVDQA 64(AX), Y2 + VMOVDQA 96(AX), Y3 + VMOVDQA 128(AX), Y4 + VPXOR 160(AX), Y0, Y0 + VPXOR 192(AX), Y1, Y1 + VPXOR 224(AX), Y2, Y2 + VPXOR 256(AX), Y3, Y3 + VPXOR 288(AX), Y4, Y4 + VPXOR 320(AX), Y0, Y0 + VPXOR 352(AX), Y1, Y1 + VPXOR 384(AX), Y2, Y2 + VPXOR 416(AX), Y3, Y3 + VPXOR 448(AX), Y4, Y4 + VPXOR 480(AX), Y0, Y0 + VPXOR 512(AX), Y1, Y1 + VPXOR 544(AX), Y2, Y2 + VPXOR 576(AX), Y3, Y3 + VPXOR 608(AX), Y4, Y4 + VPXOR 640(AX), Y0, Y0 + VPXOR 672(AX), Y1, Y1 + VPXOR 704(AX), Y2, Y2 + VPXOR 736(AX), Y3, Y3 + VPXOR 768(AX), Y4, Y4 + VPSLLQ $0x01, Y1, Y5 + VPSLLQ $0x01, Y2, Y6 + VPSLLQ $0x01, Y3, Y7 + VPSLLQ $0x01, Y4, Y8 + VPSLLQ $0x01, Y0, Y9 + VPSRLQ $0x3f, Y1, Y10 + VPSRLQ $0x3f, Y2, Y11 + VPSRLQ $0x3f, Y3, Y12 + VPSRLQ $0x3f, Y4, Y13 + VPSRLQ $0x3f, Y0, Y14 + VPOR Y5, Y10, Y10 + VPOR Y6, Y11, Y11 + VPOR Y7, Y12, Y12 + VPOR Y8, Y13, Y13 + VPOR Y9, Y14, Y14 + VPXOR Y10, Y4, Y10 + VPXOR Y11, Y0, Y11 + VPXOR Y12, Y1, Y12 + VPXOR Y13, Y2, Y13 + VPXOR Y14, Y3, Y14 + VPXOR (AX), Y10, Y0 + VPXOR 192(AX), Y11, Y1 + VPXOR 384(AX), Y12, Y2 + VPXOR 576(AX), Y13, Y3 + VPXOR 768(AX), Y14, Y4 + VPSLLQ $0x2c, Y1, Y6 + VPSLLQ $0x2b, Y2, Y7 + VPSLLQ $0x15, Y3, Y8 + VPSLLQ $0x0e, Y4, Y9 + VPSRLQ $0x14, Y1, Y1 + VPSRLQ $0x15, Y2, Y2 + VPSRLQ $0x2b, Y3, Y3 + VPSRLQ $0x32, Y4, Y4 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VPBROADCASTQ (CX), Y0 + VPXOR Y0, Y5, Y5 + VMOVDQA Y5, (AX) + VMOVDQA Y6, 192(AX) + VMOVDQA Y7, 384(AX) + VMOVDQA Y8, 576(AX) + VMOVDQA Y9, 768(AX) + VPXOR 96(AX), Y13, Y0 + VPXOR 288(AX), Y14, Y1 + VPXOR 320(AX), Y10, Y2 + VPXOR 512(AX), Y11, Y3 + VPXOR 704(AX), Y12, Y4 + VPSLLQ $0x1c, Y0, Y5 + VPSLLQ $0x14, Y1, Y6 + VPSLLQ $0x03, Y2, Y7 + VPSLLQ $0x2d, Y3, Y8 + VPSLLQ $0x3d, Y4, Y9 + VPSRLQ $0x24, Y0, Y0 + VPSRLQ $0x2c, Y1, Y1 + VPSRLQ $0x3d, Y2, Y2 + VPSRLQ $0x13, Y3, Y3 + VPSRLQ $0x03, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 320(AX) + VMOVDQA Y6, 512(AX) + VMOVDQA Y7, 704(AX) + VMOVDQA Y8, 96(AX) + VMOVDQA Y9, 288(AX) + VPXOR 32(AX), Y11, Y0 + VPXOR 224(AX), Y12, Y1 + VPXOR 416(AX), Y13, Y2 + VPXOR 608(AX), Y14, Y3 + VPXOR 640(AX), Y10, Y4 + VPSLLQ $0x01, Y0, Y5 + VPSLLQ $0x06, Y1, Y6 + VPSLLQ $0x19, Y2, Y7 + VPSLLQ $0x08, Y3, Y8 + VPSLLQ $0x12, Y4, Y9 + VPSRLQ $0x3f, Y0, Y0 + VPSRLQ $0x3a, Y1, Y1 + VPSRLQ $0x27, Y2, Y2 + VPSRLQ $0x38, Y3, Y3 + VPSRLQ $0x2e, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 640(AX) + VMOVDQA Y6, 32(AX) + VMOVDQA Y7, 224(AX) + VMOVDQA Y8, 416(AX) + VMOVDQA Y9, 608(AX) + VPXOR 128(AX), Y14, Y0 + VPXOR 160(AX), Y10, Y1 + VPXOR 352(AX), Y11, Y2 + VPXOR 544(AX), Y12, Y3 + VPXOR 736(AX), Y13, Y4 + VPSLLQ $0x1b, Y0, Y5 + VPSLLQ $0x24, Y1, Y6 + VPSLLQ $0x0a, Y2, Y7 + VPSLLQ $0x0f, Y3, Y8 + VPSLLQ $0x38, Y4, Y9 + VPSRLQ $0x25, Y0, Y0 + VPSRLQ $0x1c, Y1, Y1 + VPSRLQ $0x36, Y2, Y2 + VPSRLQ $0x31, Y3, Y3 + VPSRLQ $0x08, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 160(AX) + VMOVDQA Y6, 352(AX) + VMOVDQA Y7, 544(AX) + VMOVDQA Y8, 736(AX) + VMOVDQA Y9, 128(AX) + VPXOR 64(AX), Y12, Y0 + VPXOR 256(AX), Y13, Y1 + VPXOR 448(AX), Y14, Y2 + VPXOR 480(AX), Y10, Y3 + VPXOR 672(AX), Y11, Y4 + VPSLLQ $0x3e, Y0, Y5 + VPSLLQ $0x37, Y1, Y6 + VPSLLQ $0x27, Y2, Y7 + VPSLLQ $0x29, Y3, Y8 + VPSLLQ $0x02, Y4, Y9 + VPSRLQ $0x02, Y0, Y0 + VPSRLQ $0x09, Y1, Y1 + VPSRLQ $0x19, Y2, Y2 + VPSRLQ $0x17, Y3, Y3 + VPSRLQ $0x3e, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 480(AX) + VMOVDQA Y6, 672(AX) + VMOVDQA Y7, 64(AX) + VMOVDQA Y8, 256(AX) + VMOVDQA Y9, 448(AX) + VMOVDQA (AX), Y0 + VMOVDQA 32(AX), Y1 + VMOVDQA 64(AX), Y2 + VMOVDQA 96(AX), Y3 + VMOVDQA 128(AX), Y4 + VPXOR 160(AX), Y0, Y0 + VPXOR 192(AX), Y1, Y1 + VPXOR 224(AX), Y2, Y2 + VPXOR 256(AX), Y3, Y3 + VPXOR 288(AX), Y4, Y4 + VPXOR 320(AX), Y0, Y0 + VPXOR 352(AX), Y1, Y1 + VPXOR 384(AX), Y2, Y2 + VPXOR 416(AX), Y3, Y3 + VPXOR 448(AX), Y4, Y4 + VPXOR 480(AX), Y0, Y0 + VPXOR 512(AX), Y1, Y1 + VPXOR 544(AX), Y2, Y2 + VPXOR 576(AX), Y3, Y3 + VPXOR 608(AX), Y4, Y4 + VPXOR 640(AX), Y0, Y0 + VPXOR 672(AX), Y1, Y1 + VPXOR 704(AX), Y2, Y2 + VPXOR 736(AX), Y3, Y3 + VPXOR 768(AX), Y4, Y4 + VPSLLQ $0x01, Y1, Y5 + VPSLLQ $0x01, Y2, Y6 + VPSLLQ $0x01, Y3, Y7 + VPSLLQ $0x01, Y4, Y8 + VPSLLQ $0x01, Y0, Y9 + VPSRLQ $0x3f, Y1, Y10 + VPSRLQ $0x3f, Y2, Y11 + VPSRLQ $0x3f, Y3, Y12 + VPSRLQ $0x3f, Y4, Y13 + VPSRLQ $0x3f, Y0, Y14 + VPOR Y5, Y10, Y10 + VPOR Y6, Y11, Y11 + VPOR Y7, Y12, Y12 + VPOR Y8, Y13, Y13 + VPOR Y9, Y14, Y14 + VPXOR Y10, Y4, Y10 + VPXOR Y11, Y0, Y11 + VPXOR Y12, Y1, Y12 + VPXOR Y13, Y2, Y13 + VPXOR Y14, Y3, Y14 + VPXOR (AX), Y10, Y0 + VPXOR 512(AX), Y11, Y1 + VPXOR 224(AX), Y12, Y2 + VPXOR 736(AX), Y13, Y3 + VPXOR 448(AX), Y14, Y4 + VPSLLQ $0x2c, Y1, Y6 + VPSLLQ $0x2b, Y2, Y7 + VPSLLQ $0x15, Y3, Y8 + VPSLLQ $0x0e, Y4, Y9 + VPSRLQ $0x14, Y1, Y1 + VPSRLQ $0x15, Y2, Y2 + VPSRLQ $0x2b, Y3, Y3 + VPSRLQ $0x32, Y4, Y4 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VPBROADCASTQ 8(CX), Y0 + VPXOR Y0, Y5, Y5 + VMOVDQA Y5, (AX) + VMOVDQA Y6, 512(AX) + VMOVDQA Y7, 224(AX) + VMOVDQA Y8, 736(AX) + VMOVDQA Y9, 448(AX) + VPXOR 576(AX), Y13, Y0 + VPXOR 288(AX), Y14, Y1 + VPXOR 640(AX), Y10, Y2 + VPXOR 352(AX), Y11, Y3 + VPXOR 64(AX), Y12, Y4 + VPSLLQ $0x1c, Y0, Y5 + VPSLLQ $0x14, Y1, Y6 + VPSLLQ $0x03, Y2, Y7 + VPSLLQ $0x2d, Y3, Y8 + VPSLLQ $0x3d, Y4, Y9 + VPSRLQ $0x24, Y0, Y0 + VPSRLQ $0x2c, Y1, Y1 + VPSRLQ $0x3d, Y2, Y2 + VPSRLQ $0x13, Y3, Y3 + VPSRLQ $0x03, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 640(AX) + VMOVDQA Y6, 352(AX) + VMOVDQA Y7, 64(AX) + VMOVDQA Y8, 576(AX) + VMOVDQA Y9, 288(AX) + VPXOR 192(AX), Y11, Y0 + VPXOR 704(AX), Y12, Y1 + VPXOR 416(AX), Y13, Y2 + VPXOR 128(AX), Y14, Y3 + VPXOR 480(AX), Y10, Y4 + VPSLLQ $0x01, Y0, Y5 + VPSLLQ $0x06, Y1, Y6 + VPSLLQ $0x19, Y2, Y7 + VPSLLQ $0x08, Y3, Y8 + VPSLLQ $0x12, Y4, Y9 + VPSRLQ $0x3f, Y0, Y0 + VPSRLQ $0x3a, Y1, Y1 + VPSRLQ $0x27, Y2, Y2 + VPSRLQ $0x38, Y3, Y3 + VPSRLQ $0x2e, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 480(AX) + VMOVDQA Y6, 192(AX) + VMOVDQA Y7, 704(AX) + VMOVDQA Y8, 416(AX) + VMOVDQA Y9, 128(AX) + VPXOR 768(AX), Y14, Y0 + VPXOR 320(AX), Y10, Y1 + VPXOR 32(AX), Y11, Y2 + VPXOR 544(AX), Y12, Y3 + VPXOR 256(AX), Y13, Y4 + VPSLLQ $0x1b, Y0, Y5 + VPSLLQ $0x24, Y1, Y6 + VPSLLQ $0x0a, Y2, Y7 + VPSLLQ $0x0f, Y3, Y8 + VPSLLQ $0x38, Y4, Y9 + VPSRLQ $0x25, Y0, Y0 + VPSRLQ $0x1c, Y1, Y1 + VPSRLQ $0x36, Y2, Y2 + VPSRLQ $0x31, Y3, Y3 + VPSRLQ $0x08, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 320(AX) + VMOVDQA Y6, 32(AX) + VMOVDQA Y7, 544(AX) + VMOVDQA Y8, 256(AX) + VMOVDQA Y9, 768(AX) + VPXOR 384(AX), Y12, Y0 + VPXOR 96(AX), Y13, Y1 + VPXOR 608(AX), Y14, Y2 + VPXOR 160(AX), Y10, Y3 + VPXOR 672(AX), Y11, Y4 + VPSLLQ $0x3e, Y0, Y5 + VPSLLQ $0x37, Y1, Y6 + VPSLLQ $0x27, Y2, Y7 + VPSLLQ $0x29, Y3, Y8 + VPSLLQ $0x02, Y4, Y9 + VPSRLQ $0x02, Y0, Y0 + VPSRLQ $0x09, Y1, Y1 + VPSRLQ $0x19, Y2, Y2 + VPSRLQ $0x17, Y3, Y3 + VPSRLQ $0x3e, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 160(AX) + VMOVDQA Y6, 672(AX) + VMOVDQA Y7, 384(AX) + VMOVDQA Y8, 96(AX) + VMOVDQA Y9, 608(AX) + VMOVDQA (AX), Y0 + VMOVDQA 32(AX), Y1 + VMOVDQA 64(AX), Y2 + VMOVDQA 96(AX), Y3 + VMOVDQA 128(AX), Y4 + VPXOR 160(AX), Y0, Y0 + VPXOR 192(AX), Y1, Y1 + VPXOR 224(AX), Y2, Y2 + VPXOR 256(AX), Y3, Y3 + VPXOR 288(AX), Y4, Y4 + VPXOR 320(AX), Y0, Y0 + VPXOR 352(AX), Y1, Y1 + VPXOR 384(AX), Y2, Y2 + VPXOR 416(AX), Y3, Y3 + VPXOR 448(AX), Y4, Y4 + VPXOR 480(AX), Y0, Y0 + VPXOR 512(AX), Y1, Y1 + VPXOR 544(AX), Y2, Y2 + VPXOR 576(AX), Y3, Y3 + VPXOR 608(AX), Y4, Y4 + VPXOR 640(AX), Y0, Y0 + VPXOR 672(AX), Y1, Y1 + VPXOR 704(AX), Y2, Y2 + VPXOR 736(AX), Y3, Y3 + VPXOR 768(AX), Y4, Y4 + VPSLLQ $0x01, Y1, Y5 + VPSLLQ $0x01, Y2, Y6 + VPSLLQ $0x01, Y3, Y7 + VPSLLQ $0x01, Y4, Y8 + VPSLLQ $0x01, Y0, Y9 + VPSRLQ $0x3f, Y1, Y10 + VPSRLQ $0x3f, Y2, Y11 + VPSRLQ $0x3f, Y3, Y12 + VPSRLQ $0x3f, Y4, Y13 + VPSRLQ $0x3f, Y0, Y14 + VPOR Y5, Y10, Y10 + VPOR Y6, Y11, Y11 + VPOR Y7, Y12, Y12 + VPOR Y8, Y13, Y13 + VPOR Y9, Y14, Y14 + VPXOR Y10, Y4, Y10 + VPXOR Y11, Y0, Y11 + VPXOR Y12, Y1, Y12 + VPXOR Y13, Y2, Y13 + VPXOR Y14, Y3, Y14 + VPXOR (AX), Y10, Y0 + VPXOR 352(AX), Y11, Y1 + VPXOR 704(AX), Y12, Y2 + VPXOR 256(AX), Y13, Y3 + VPXOR 608(AX), Y14, Y4 + VPSLLQ $0x2c, Y1, Y6 + VPSLLQ $0x2b, Y2, Y7 + VPSLLQ $0x15, Y3, Y8 + VPSLLQ $0x0e, Y4, Y9 + VPSRLQ $0x14, Y1, Y1 + VPSRLQ $0x15, Y2, Y2 + VPSRLQ $0x2b, Y3, Y3 + VPSRLQ $0x32, Y4, Y4 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VPBROADCASTQ 16(CX), Y0 + VPXOR Y0, Y5, Y5 + VMOVDQA Y5, (AX) + VMOVDQA Y6, 352(AX) + VMOVDQA Y7, 704(AX) + VMOVDQA Y8, 256(AX) + VMOVDQA Y9, 608(AX) + VPXOR 736(AX), Y13, Y0 + VPXOR 288(AX), Y14, Y1 + VPXOR 480(AX), Y10, Y2 + VPXOR 32(AX), Y11, Y3 + VPXOR 384(AX), Y12, Y4 + VPSLLQ $0x1c, Y0, Y5 + VPSLLQ $0x14, Y1, Y6 + VPSLLQ $0x03, Y2, Y7 + VPSLLQ $0x2d, Y3, Y8 + VPSLLQ $0x3d, Y4, Y9 + VPSRLQ $0x24, Y0, Y0 + VPSRLQ $0x2c, Y1, Y1 + VPSRLQ $0x3d, Y2, Y2 + VPSRLQ $0x13, Y3, Y3 + VPSRLQ $0x03, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 480(AX) + VMOVDQA Y6, 32(AX) + VMOVDQA Y7, 384(AX) + VMOVDQA Y8, 736(AX) + VMOVDQA Y9, 288(AX) + VPXOR 512(AX), Y11, Y0 + VPXOR 64(AX), Y12, Y1 + VPXOR 416(AX), Y13, Y2 + VPXOR 768(AX), Y14, Y3 + VPXOR 160(AX), Y10, Y4 + VPSLLQ $0x01, Y0, Y5 + VPSLLQ $0x06, Y1, Y6 + VPSLLQ $0x19, Y2, Y7 + VPSLLQ $0x08, Y3, Y8 + VPSLLQ $0x12, Y4, Y9 + VPSRLQ $0x3f, Y0, Y0 + VPSRLQ $0x3a, Y1, Y1 + VPSRLQ $0x27, Y2, Y2 + VPSRLQ $0x38, Y3, Y3 + VPSRLQ $0x2e, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 160(AX) + VMOVDQA Y6, 512(AX) + VMOVDQA Y7, 64(AX) + VMOVDQA Y8, 416(AX) + VMOVDQA Y9, 768(AX) + VPXOR 448(AX), Y14, Y0 + VPXOR 640(AX), Y10, Y1 + VPXOR 192(AX), Y11, Y2 + VPXOR 544(AX), Y12, Y3 + VPXOR 96(AX), Y13, Y4 + VPSLLQ $0x1b, Y0, Y5 + VPSLLQ $0x24, Y1, Y6 + VPSLLQ $0x0a, Y2, Y7 + VPSLLQ $0x0f, Y3, Y8 + VPSLLQ $0x38, Y4, Y9 + VPSRLQ $0x25, Y0, Y0 + VPSRLQ $0x1c, Y1, Y1 + VPSRLQ $0x36, Y2, Y2 + VPSRLQ $0x31, Y3, Y3 + VPSRLQ $0x08, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 640(AX) + VMOVDQA Y6, 192(AX) + VMOVDQA Y7, 544(AX) + VMOVDQA Y8, 96(AX) + VMOVDQA Y9, 448(AX) + VPXOR 224(AX), Y12, Y0 + VPXOR 576(AX), Y13, Y1 + VPXOR 128(AX), Y14, Y2 + VPXOR 320(AX), Y10, Y3 + VPXOR 672(AX), Y11, Y4 + VPSLLQ $0x3e, Y0, Y5 + VPSLLQ $0x37, Y1, Y6 + VPSLLQ $0x27, Y2, Y7 + VPSLLQ $0x29, Y3, Y8 + VPSLLQ $0x02, Y4, Y9 + VPSRLQ $0x02, Y0, Y0 + VPSRLQ $0x09, Y1, Y1 + VPSRLQ $0x19, Y2, Y2 + VPSRLQ $0x17, Y3, Y3 + VPSRLQ $0x3e, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 320(AX) + VMOVDQA Y6, 672(AX) + VMOVDQA Y7, 224(AX) + VMOVDQA Y8, 576(AX) + VMOVDQA Y9, 128(AX) + VMOVDQA (AX), Y0 + VMOVDQA 32(AX), Y1 + VMOVDQA 64(AX), Y2 + VMOVDQA 96(AX), Y3 + VMOVDQA 128(AX), Y4 + VPXOR 160(AX), Y0, Y0 + VPXOR 192(AX), Y1, Y1 + VPXOR 224(AX), Y2, Y2 + VPXOR 256(AX), Y3, Y3 + VPXOR 288(AX), Y4, Y4 + VPXOR 320(AX), Y0, Y0 + VPXOR 352(AX), Y1, Y1 + VPXOR 384(AX), Y2, Y2 + VPXOR 416(AX), Y3, Y3 + VPXOR 448(AX), Y4, Y4 + VPXOR 480(AX), Y0, Y0 + VPXOR 512(AX), Y1, Y1 + VPXOR 544(AX), Y2, Y2 + VPXOR 576(AX), Y3, Y3 + VPXOR 608(AX), Y4, Y4 + VPXOR 640(AX), Y0, Y0 + VPXOR 672(AX), Y1, Y1 + VPXOR 704(AX), Y2, Y2 + VPXOR 736(AX), Y3, Y3 + VPXOR 768(AX), Y4, Y4 + VPSLLQ $0x01, Y1, Y5 + VPSLLQ $0x01, Y2, Y6 + VPSLLQ $0x01, Y3, Y7 + VPSLLQ $0x01, Y4, Y8 + VPSLLQ $0x01, Y0, Y9 + VPSRLQ $0x3f, Y1, Y10 + VPSRLQ $0x3f, Y2, Y11 + VPSRLQ $0x3f, Y3, Y12 + VPSRLQ $0x3f, Y4, Y13 + VPSRLQ $0x3f, Y0, Y14 + VPOR Y5, Y10, Y10 + VPOR Y6, Y11, Y11 + VPOR Y7, Y12, Y12 + VPOR Y8, Y13, Y13 + VPOR Y9, Y14, Y14 + VPXOR Y10, Y4, Y10 + VPXOR Y11, Y0, Y11 + VPXOR Y12, Y1, Y12 + VPXOR Y13, Y2, Y13 + VPXOR Y14, Y3, Y14 + VPXOR (AX), Y10, Y0 + VPXOR 32(AX), Y11, Y1 + VPXOR 64(AX), Y12, Y2 + VPXOR 96(AX), Y13, Y3 + VPXOR 128(AX), Y14, Y4 + VPSLLQ $0x2c, Y1, Y6 + VPSLLQ $0x2b, Y2, Y7 + VPSLLQ $0x15, Y3, Y8 + VPSLLQ $0x0e, Y4, Y9 + VPSRLQ $0x14, Y1, Y1 + VPSRLQ $0x15, Y2, Y2 + VPSRLQ $0x2b, Y3, Y3 + VPSRLQ $0x32, Y4, Y4 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VPBROADCASTQ 24(CX), Y0 + VPXOR Y0, Y5, Y5 + VMOVDQA Y5, (AX) + VMOVDQA Y6, 32(AX) + VMOVDQA Y7, 64(AX) + VMOVDQA Y8, 96(AX) + VMOVDQA Y9, 128(AX) + VPXOR 256(AX), Y13, Y0 + VPXOR 288(AX), Y14, Y1 + VPXOR 160(AX), Y10, Y2 + VPXOR 192(AX), Y11, Y3 + VPXOR 224(AX), Y12, Y4 + VPSLLQ $0x1c, Y0, Y5 + VPSLLQ $0x14, Y1, Y6 + VPSLLQ $0x03, Y2, Y7 + VPSLLQ $0x2d, Y3, Y8 + VPSLLQ $0x3d, Y4, Y9 + VPSRLQ $0x24, Y0, Y0 + VPSRLQ $0x2c, Y1, Y1 + VPSRLQ $0x3d, Y2, Y2 + VPSRLQ $0x13, Y3, Y3 + VPSRLQ $0x03, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 160(AX) + VMOVDQA Y6, 192(AX) + VMOVDQA Y7, 224(AX) + VMOVDQA Y8, 256(AX) + VMOVDQA Y9, 288(AX) + VPXOR 352(AX), Y11, Y0 + VPXOR 384(AX), Y12, Y1 + VPXOR 416(AX), Y13, Y2 + VPXOR 448(AX), Y14, Y3 + VPXOR 320(AX), Y10, Y4 + VPSLLQ $0x01, Y0, Y5 + VPSLLQ $0x06, Y1, Y6 + VPSLLQ $0x19, Y2, Y7 + VPSLLQ $0x08, Y3, Y8 + VPSLLQ $0x12, Y4, Y9 + VPSRLQ $0x3f, Y0, Y0 + VPSRLQ $0x3a, Y1, Y1 + VPSRLQ $0x27, Y2, Y2 + VPSRLQ $0x38, Y3, Y3 + VPSRLQ $0x2e, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 320(AX) + VMOVDQA Y6, 352(AX) + VMOVDQA Y7, 384(AX) + VMOVDQA Y8, 416(AX) + VMOVDQA Y9, 448(AX) + VPXOR 608(AX), Y14, Y0 + VPXOR 480(AX), Y10, Y1 + VPXOR 512(AX), Y11, Y2 + VPXOR 544(AX), Y12, Y3 + VPXOR 576(AX), Y13, Y4 + VPSLLQ $0x1b, Y0, Y5 + VPSLLQ $0x24, Y1, Y6 + VPSLLQ $0x0a, Y2, Y7 + VPSLLQ $0x0f, Y3, Y8 + VPSLLQ $0x38, Y4, Y9 + VPSRLQ $0x25, Y0, Y0 + VPSRLQ $0x1c, Y1, Y1 + VPSRLQ $0x36, Y2, Y2 + VPSRLQ $0x31, Y3, Y3 + VPSRLQ $0x08, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 480(AX) + VMOVDQA Y6, 512(AX) + VMOVDQA Y7, 544(AX) + VMOVDQA Y8, 576(AX) + VMOVDQA Y9, 608(AX) + VPXOR 704(AX), Y12, Y0 + VPXOR 736(AX), Y13, Y1 + VPXOR 768(AX), Y14, Y2 + VPXOR 640(AX), Y10, Y3 + VPXOR 672(AX), Y11, Y4 + VPSLLQ $0x3e, Y0, Y5 + VPSLLQ $0x37, Y1, Y6 + VPSLLQ $0x27, Y2, Y7 + VPSLLQ $0x29, Y3, Y8 + VPSLLQ $0x02, Y4, Y9 + VPSRLQ $0x02, Y0, Y0 + VPSRLQ $0x09, Y1, Y1 + VPSRLQ $0x19, Y2, Y2 + VPSRLQ $0x17, Y3, Y3 + VPSRLQ $0x3e, Y4, Y4 + VPOR Y5, Y0, Y0 + VPOR Y6, Y1, Y1 + VPOR Y7, Y2, Y2 + VPOR Y8, Y3, Y3 + VPOR Y9, Y4, Y4 + VPANDN Y2, Y1, Y5 + VPANDN Y3, Y2, Y6 + VPANDN Y4, Y3, Y7 + VPANDN Y0, Y4, Y8 + VPANDN Y1, Y0, Y9 + VPXOR Y0, Y5, Y5 + VPXOR Y1, Y6, Y6 + VPXOR Y2, Y7, Y7 + VPXOR Y3, Y8, Y8 + VPXOR Y4, Y9, Y9 + VMOVDQA Y5, 640(AX) + VMOVDQA Y6, 672(AX) + VMOVDQA Y7, 704(AX) + VMOVDQA Y8, 736(AX) + VMOVDQA Y9, 768(AX) + ADDQ $0x20, CX + SUBQ $0x00000001, DX + JNZ loop + RET diff --git a/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x4stubs_amd64.go b/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x4stubs_amd64.go new file mode 100644 index 0000000..102fdd0 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/f1600x4stubs_amd64.go @@ -0,0 +1,8 @@ +// Code generated by command: go run src.go -out ../../f1600x4_amd64.s -stubs ../../f1600x4stubs_amd64.go -pkg keccakf1600. DO NOT EDIT. + +//go:build amd64 && !purego + +package keccakf1600 + +//go:noescape +func f1600x4AVX2(state *uint64, rc *[24]uint64, turbo bool) diff --git a/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/fallback.go b/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/fallback.go new file mode 100644 index 0000000..0da75e9 --- /dev/null +++ b/backend/vendor/github.com/cloudflare/circl/simd/keccakf1600/fallback.go @@ -0,0 +1,8 @@ +//go:build (!amd64 && !arm64) || (arm64 && !go1.16) || purego +// +build !amd64,!arm64 arm64,!go1.16 purego + +package keccakf1600 + +func permuteSIMDx2(state []uint64, turbo bool) { permuteScalarX2(state, turbo) } + +func permuteSIMDx4(state []uint64, turbo bool) { permuteScalarX4(state, turbo) } diff --git a/backend/vendor/github.com/enetx/g/.gitignore b/backend/vendor/github.com/enetx/g/.gitignore new file mode 100644 index 0000000..3ba1bd1 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/.gitignore @@ -0,0 +1,5 @@ +profile.cov +string_crypt.go +pool_ch.go_ +archive/ +tests/string_crypt_test.go diff --git a/backend/vendor/github.com/enetx/g/LICENSE b/backend/vendor/github.com/enetx/g/LICENSE new file mode 100644 index 0000000..4b5e7e1 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2024 enetx + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/backend/vendor/github.com/enetx/g/README.md b/backend/vendor/github.com/enetx/g/README.md new file mode 100644 index 0000000..014d7a8 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/README.md @@ -0,0 +1,243 @@ +

+ +

+ +# 🤪 G: Go Crazy, Go G, Go Nuts! +[![Go Reference](https://pkg.go.dev/badge/github.com/enetx/g.svg)](https://pkg.go.dev/github.com/enetx/g) +[![Go Report Card](https://goreportcard.com/badge/github.com/enetx/g)](https://goreportcard.com/report/github.com/enetx/g) +[![Coverage Status](https://coveralls.io/repos/github/enetx/g/badge.svg?branch=main&service=github)](https://coveralls.io/github/enetx/g?branch=main) +[![Go](https://github.com/enetx/g/actions/workflows/go.yml/badge.svg)](https://github.com/enetx/g/actions/workflows/go.yml) +[![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/enetx/g) + +Introducing G, the wackiest Go package on the planet, created to make your coding experience an absolute riot! With G, you can forget about dull and monotonous code, we're all about turning the mundane into the insanely hilarious. It's not just a bicycle, it's almost a motorcycle 🤣! + +## 🎉 What's in the box? +1. 📖 **Readable syntax**: Boring code is so yesterday! G turns your code into a party by blending seamlessly with Go and making it super clean and laughably maintainable. +2. 🔀 **Encoding and decoding:** Juggling data formats? No problemo! G's got your back with __Base64__, __URL__, __Gzip__, and __Rot13__ support. Encode and decode like a pro! +3. 🔒 **Hashing extravaganza:** Safety first, right? Hash your data with __MD5__, __SHA1__, __SHA256__, or __SHA512__, and enjoy peace of mind while G watches over your bytes. +4. 📁 **File and directory shenanigans:** Create, read, write, and dance through files and directories with G's fun-tastic functions. Trust us, managing files has never been this entertaining. +5. 🌈 **Data type compatibility:** Strings, integers, floats, bytes, slices, maps, you name it! G is the life of the party, mingling with all your favorite data types. +6. 🔧 **Customize and extend:** Need something extra? G is your best buddy, ready to be extended or modified to suit any project. +7. 📚 **Docs & examples:** We're not just about fun and games, we've got detailed documentation and examples that'll have you smiling from ear to ear as you learn the G way. + +Take your Go projects to a whole new level of excitement with G! It's time to stop coding like it's a chore and start coding like it's a celebration! 🥳 + +# Examples + +Generate a securely random string. + + + + + + + + + + +
stdlibg
+ +```go +func main() { + const charset = "abcdefghijklmnopqrstuvwxyz" + + "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" + + length := 10 + + b := make([]byte, length) + if _, err := rand.Read(b); err != nil { + return + } + + for i, v := range b { + b[i] = charset[v%byte(len(charset))] + } + + result := string(b) + fmt.Println(result) +} +``` + + +```go +func main() { + result := g.NewString().Random(10) + fmt.Println(result) +} +``` +
+ +GetOrDefault returns the value for a key. If the key does not exist, returns the default value +instead. This function is useful when you want to provide a fallback value for keys that may not +be present in the map. + + + + + + + + + + +
stdlibg
+ +```go +func main() { + md := make(map[int][]int) + + for i := range 5 { + md[i] = append(md[i], i) + } + + fmt.Println(md) +} +``` + + +```go +func main() { + md := g.NewMap[int, g.Slice[int]]() + + for i := range 5 { + md.Set(i, md.Get(i).UnwrapOrDefault().Append(i)) + } + + // or + + for i := range 5 { + entry := md.Entry(i) + entry.OrDefault() // Insert an empty slice if missing + entry.Transform( + func(s Slice[int]) Slice[int] { + return s.Append(i) // Append the current index to the slice + }) + } + + fmt.Println(md) +} +``` +
+ +Copy copies the contents of the current directory to the destination directory. + + + + + + + + + + +
stdlibg
+ +```go +func copyDir(src, dest string) error { + return filepath.Walk(src, func(path string, + info fs.FileInfo, err error, + ) error { + if err != nil { + return err + } + + relPath, err := filepath.Rel(src, path) + if err != nil { + return err + } + + destPath := filepath.Join(dest, relPath) + + if info.IsDir() { + return os.MkdirAll(destPath, info.Mode()) + } + + return copyFile(path, destPath, info.Mode()) + }) +} + +func copyFile(src, dest string, mode fs.FileMode) error { + srcFile, err := os.Open(src) + if err != nil { + return err + } + defer srcFile.Close() + + destFile, err := os.OpenFile(dest, os.O_CREATE|os.O_WRONLY, mode) + if err != nil { + return err + } + defer destFile.Close() + + _, err = io.Copy(destFile, srcFile) + + return err +} + +func main() { + src := "path/to/source/directory" + dest := "path/to/destination/directory" + + err := copyDir(src, dest) + if err != nil { + fmt.Println("Error copying directory:", err) + } else { + fmt.Println("Directory copied successfully") + } +} +``` + + +```go +func main() { + g.NewDir(".").Copy("copy").Unwrap() +} +``` +
+ +RandomSample returns a new slice containing a random sample of elements from the original slice. + + + + + + + + + + +
stdlibg
+ +```go +func RandomSample(slice []int, amount int) []int { + if amount > len(slice) { + amount = len(slice) + } + + samples := make([]int, amount) + + for i := 0; i < amount; i++ { + index, _ := rand.Int(rand.Reader, big.NewInt(int64(len(slice)))) + samples[i] = slice[index.Int64()] + slice = append(slice[:index.Int64()], slice[index.Int64()+1:]...) + } + + return samples +} + +func main() { + slice := []int{1, 2, 3, 4, 5, 6} + samples := RandomSample(slice, 3) + fmt.Println(samples) +} +``` + + +```go +func main() { + slice := g.SliceOf(1, 2, 3, 4, 5, 6) + samples := slice.RandomSample(3) + fmt.Println(samples) +} +``` +
diff --git a/backend/vendor/github.com/enetx/g/bytes.go b/backend/vendor/github.com/enetx/g/bytes.go new file mode 100644 index 0000000..bd7474d --- /dev/null +++ b/backend/vendor/github.com/enetx/g/bytes.go @@ -0,0 +1,411 @@ +package g + +import ( + "bytes" + "encoding/binary" + "fmt" + "math" + "unicode" + "unicode/utf8" + "unsafe" + + "github.com/enetx/g/cmp" + "golang.org/x/text/cases" + "golang.org/x/text/language" + "golang.org/x/text/unicode/norm" +) + +var ( + lower = cases.Lower(language.Und) + upper = cases.Upper(language.Und) + title = cases.Title(language.Und) +) + +// NewBytes creates a new Bytes value. +func NewBytes(size ...Int) Bytes { + var ( + length Int + capacity Int + ) + + switch { + case len(size) > 1: + length, capacity = size[0], size[1] + case len(size) == 1: + length, capacity = size[0], size[0] + } + + return make([]byte, length, capacity) +} + +// Transform applies a transformation function to the Bytes and returns the result. +func (bs Bytes) Transform(fn func(Bytes) Bytes) Bytes { return fn(bs) } + +// Reverse reverses bytes for ASCII or invalid UTF-8 for valid UTF-8 it reverses by runes. +func (bs Bytes) Reverse() Bytes { + n := len(bs) + out := make(Bytes, n) + ascii := true + + for _, b := range bs { + if b >= utf8.RuneSelf { + ascii = false + break + } + } + + if ascii || !utf8.Valid(bs) { + for i, b := range bs { + out[n-1-i] = b + } + + return out + } + + w := 0 + + for i := n; i > 0; { + r, size := utf8.DecodeLastRune(bs[:i]) + w += utf8.EncodeRune(out[w:], r) + i -= size + } + + return out +} + +// Replace replaces the first 'n' occurrences of 'oldB' with 'newB' in the Bytes. +func (bs Bytes) Replace(oldB, newB Bytes, n Int) Bytes { return bytes.Replace(bs, oldB, newB, n.Std()) } + +// ReplaceAll replaces all occurrences of 'oldB' with 'newB' in the Bytes. +func (bs Bytes) ReplaceAll(oldB, newB Bytes) Bytes { return bytes.ReplaceAll(bs, oldB, newB) } + +// Trim trims leading and trailing white space from the Bytes. +func (bs Bytes) Trim() Bytes { return bytes.TrimSpace(bs) } + +// TrimStart removes leading white space from the Bytes. +func (bs Bytes) TrimStart() Bytes { return bytes.TrimLeftFunc(bs, unicode.IsSpace) } + +// TrimEnd removes trailing white space from the Bytes. +func (bs Bytes) TrimEnd() Bytes { return bytes.TrimRightFunc(bs, unicode.IsSpace) } + +// TrimSet trims the specified set of characters from both the beginning and end of the Bytes. +func (bs Bytes) TrimSet(cutset String) Bytes { return bytes.Trim(bs, cutset.Std()) } + +// TrimStartSet removes the specified set of characters from the beginning of the Bytes. +func (bs Bytes) TrimStartSet(cutset String) Bytes { return bytes.TrimLeft(bs, cutset.Std()) } + +// TrimEndSet removes the specified set of characters from the end of the Bytes. +func (bs Bytes) TrimEndSet(cutset String) Bytes { return bytes.TrimRight(bs, cutset.Std()) } + +// intFromBytes parses up to 8 bytes into Int using the given byte order. +// For BE: uses the last 8 bytes if longer; pads on the left if shorter. +// For LE: uses the first 8 bytes if longer; pads on the right if shorter. +func intFromBytes(bs Bytes, order binary.ByteOrder) Int { + var buf [8]byte + + switch order { + case binary.BigEndian: + if len(bs) > 8 { + bs = bs[len(bs)-8:] + } + + copy(buf[8-len(bs):], bs) + + if len(bs) > 0 && bs[0]&0x80 != 0 && len(bs) < 8 { + for i := 0; i < 8-len(bs); i++ { + buf[i] = 0xFF + } + } + case binary.LittleEndian: + if len(bs) > 8 { + bs = bs[:8] + } + + copy(buf[:len(bs)], bs) + + if len(bs) > 0 && bs[len(bs)-1]&0x80 != 0 && len(bs) < 8 { + for i := len(bs); i < 8; i++ { + buf[i] = 0xFF + } + } + } + + return Int(int64(order.Uint64(buf[:]))) +} + +// IntBE interprets the Bytes as a signed 64-bit integer in BigEndian order. +// If the Bytes length is less than 8, it is padded with leading zeros. +// If the Bytes length is greater than 8, only the last 8 bytes are used. +func (bs Bytes) IntBE() Int { return intFromBytes(bs, binary.BigEndian) } + +// IntLE interprets the Bytes as a signed 64-bit integer in LittleEndian order. +// If the Bytes length is less than 8, it is padded with trailing zeros. +// If the Bytes length is greater than 8, only the first 8 bytes are used. +func (bs Bytes) IntLE() Int { return intFromBytes(bs, binary.LittleEndian) } + +// FloatBE interprets the Bytes as an IEEE-754 64-bit float in BigEndian order. +// If the Bytes length is not exactly 8, returns 0. +func (bs Bytes) FloatBE() Float { + if len(bs) != 8 { + return 0 + } + + bits := binary.BigEndian.Uint64(bs) + + return Float(math.Float64frombits(bits)) +} + +// FloatLE interprets the Bytes as an IEEE-754 64-bit float in LittleEndian order. +// If the Bytes length is not exactly 8, returns 0. +func (bs Bytes) FloatLE() Float { + if len(bs) != 8 { + return 0 + } + + bits := binary.LittleEndian.Uint64(bs) + + return Float(math.Float64frombits(bits)) +} + +// StripPrefix trims the specified Bytes prefix from the Bytes. +func (bs Bytes) StripPrefix(cutset Bytes) Bytes { return bytes.TrimPrefix(bs, cutset) } + +// StripSuffix trims the specified Bytes suffix from the Bytes. +func (bs Bytes) StripSuffix(cutset Bytes) Bytes { return bytes.TrimSuffix(bs, cutset) } + +// Split splits the Bytes by the specified separator and returns the iterator. +func (bs Bytes) Split(sep ...Bytes) SeqSlice[Bytes] { + return transformSeq( + bytes.SplitSeq(bs, Slice[Bytes](sep).Get(0).UnwrapOrDefault()), + func(b []byte) Bytes { return Bytes(b) }, + ) +} + +// SplitAfter splits the Bytes after each instance of the specified separator and returns the iterator. +func (bs Bytes) SplitAfter(sep Bytes) SeqSlice[Bytes] { + return transformSeq(bytes.SplitAfterSeq(bs, sep), func(b []byte) Bytes { return Bytes(b) }) +} + +// Fields splits the Bytes into a slice of substrings, removing any whitespace, and returns the iterator. +func (bs Bytes) Fields() SeqSlice[Bytes] { + return transformSeq(bytes.FieldsSeq(bs), func(b []byte) Bytes { return Bytes(b) }) +} + +// FieldsBy splits the Bytes into a slice of substrings using a custom function to determine the field boundaries, +// and returns the iterator. +func (bs Bytes) FieldsBy(fn func(r rune) bool) SeqSlice[Bytes] { + return transformSeq(bytes.FieldsFuncSeq(bs, fn), func(b []byte) Bytes { return Bytes(b) }) +} + +// Append appends the given Bytes to the current Bytes. +func (bs Bytes) Append(obs Bytes) Bytes { return append(bs, obs...) } + +// Prepend prepends the given Bytes to the current Bytes. +func (bs Bytes) Prepend(obs Bytes) Bytes { + if len(obs) == 0 { + return bs + } + + if len(bs) == 0 { + return obs + } + + out := make(Bytes, len(obs)+len(bs)) + copy(out, obs) + copy(out[len(obs):], bs) + + return out +} + +// Std returns the Bytes as a byte slice. +func (bs Bytes) Std() []byte { return bs } + +// Clone creates a new Bytes instance with the same content as the current Bytes. +func (bs Bytes) Clone() Bytes { return bytes.Clone(bs) } + +// Cmp compares the Bytes with another Bytes and returns an cmp.Ordering. +func (bs Bytes) Cmp(obs Bytes) cmp.Ordering { return cmp.Ordering(bytes.Compare(bs, obs)) } + +// Contains checks if the Bytes contains the specified Bytes. +func (bs Bytes) Contains(obs Bytes) bool { return bytes.Contains(bs, obs) } + +// ContainsAny checks if the Bytes contains any of the specified Bytes. +func (bs Bytes) ContainsAny(obss ...Bytes) bool { + for _, obs := range obss { + if bytes.Contains(bs, obs) { + return true + } + } + + return false +} + +// ContainsAll checks if the Bytes contains all of the specified Bytes. +func (bs Bytes) ContainsAll(obss ...Bytes) bool { + for _, obs := range obss { + if !bytes.Contains(bs, obs) { + return false + } + } + + return true +} + +// ContainsAnyChars checks if the given Bytes contains any characters from the input String. +func (bs Bytes) ContainsAnyChars(chars String) bool { return bytes.ContainsAny(bs, chars.Std()) } + +// ContainsRune checks if the Bytes contains the specified rune. +func (bs Bytes) ContainsRune(r rune) bool { return bytes.ContainsRune(bs, r) } + +// Count counts the number of occurrences of the specified Bytes in the Bytes. +func (bs Bytes) Count(obs Bytes) Int { return Int(bytes.Count(bs, obs)) } + +// Empty checks if the Bytes is empty. +func (bs Bytes) Empty() bool { return len(bs) == 0 } + +// Eq checks if the Bytes is equal to another Bytes. +func (bs Bytes) Eq(obs Bytes) bool { return bs.Cmp(obs).IsEq() } + +// EqFold compares two Bytes slices case-insensitively. +func (bs Bytes) EqFold(obs Bytes) bool { return bytes.EqualFold(bs, obs) } + +// Gt checks if the Bytes is greater than another Bytes. +func (bs Bytes) Gt(obs Bytes) bool { return bs.Cmp(obs).IsGt() } + +// String returns the Bytes as an String. +func (bs Bytes) String() String { return String(bs) } + +// StringUnsafe converts the Bytes into a String without copying memory. +// Warning: the resulting String shares the same underlying memory as the original Bytes. +// If the Bytes is modified later, the String will reflect those changes and may cause undefined behavior. +func (bs Bytes) StringUnsafe() String { return String(*(*string)(unsafe.Pointer(&bs))) } + +// Index returns the index of the first instance of obs in bs, or -1 if bs is not present in obs. +func (bs Bytes) Index(obs Bytes) Int { return Int(bytes.Index(bs, obs)) } + +// LastIndex returns the index of the last instance of obs in bs, or -1 if obs is not present in bs. +func (bs Bytes) LastIndex(obs Bytes) Int { return Int(bytes.LastIndex(bs, obs)) } + +// IndexByte returns the index of the first instance of the byte b in bs, or -1 if b is not +// present in bs. +func (bs Bytes) IndexByte(b byte) Int { return Int(bytes.IndexByte(bs, b)) } + +// LastIndexByte returns the index of the last instance of the byte b in bs, or -1 if b is not +// present in bs. +func (bs Bytes) LastIndexByte(b byte) Int { return Int(bytes.LastIndexByte(bs, b)) } + +// IndexRune returns the index of the first instance of the rune r in bs, or -1 if r is not +// present in bs. +func (bs Bytes) IndexRune(r rune) Int { return Int(bytes.IndexRune(bs, r)) } + +// Len returns the length of the Bytes. +func (bs Bytes) Len() Int { return Int(len(bs)) } + +// LenRunes returns the number of runes in the Bytes. +func (bs Bytes) LenRunes() Int { return Int(utf8.RuneCount(bs)) } + +// Lt checks if the Bytes is less than another Bytes. +func (bs Bytes) Lt(obs Bytes) bool { return bs.Cmp(obs).IsLt() } + +// Map applies a function to each rune in the Bytes and returns the modified Bytes. +func (bs Bytes) Map(fn func(rune) rune) Bytes { return bytes.Map(fn, bs) } + +// NormalizeNFC returns a new Bytes with its Unicode characters normalized using the NFC form. +func (bs Bytes) NormalizeNFC() Bytes { return norm.NFC.Bytes(bs) } + +// Ne checks if the Bytes is not equal to another Bytes. +func (bs Bytes) Ne(obs Bytes) bool { return !bs.Eq(obs) } + +// NotEmpty checks if the Bytes is not empty. +func (bs Bytes) NotEmpty() bool { return !bs.Empty() } + +// Reader returns a *bytes.Reader initialized with the content of Bytes. +func (bs Bytes) Reader() *bytes.Reader { return bytes.NewReader(bs) } + +// Repeat returns a new Bytes consisting of the current Bytes repeated 'count' times. +func (bs Bytes) Repeat(count Int) Bytes { return bytes.Repeat(bs, count.Std()) } + +// Reset resets the length of the Bytes slice to zero, preserving its capacity. +func (bs *Bytes) Reset() { *bs = (*bs)[:0] } + +// Runes returns the Bytes as a slice of runes. +func (bs Bytes) Runes() []rune { return bytes.Runes(bs) } + +// Title converts the Bytes to title case. +func (bs Bytes) Title() Bytes { return title.Bytes(bs) } + +// Lower converts the Bytes to lowercase. +func (bs Bytes) Lower() Bytes { + for _, b := range bs { + if b >= utf8.RuneSelf { + return lower.Bytes(bs) + } + } + + needs := false + + for _, b := range bs { + if 'A' <= b && b <= 'Z' { + needs = true + break + } + } + + if !needs { + return bs + } + + out := make(Bytes, len(bs)) + + for i, b := range bs { + if 'A' <= b && b <= 'Z' { + out[i] = b + ('a' - 'A') + } else { + out[i] = b + } + } + + return out +} + +// Upper converts the Bytes to uppercase. +func (bs Bytes) Upper() Bytes { + for _, b := range bs { + if b >= utf8.RuneSelf { + return upper.Bytes(bs) + } + } + + needs := false + + for _, b := range bs { + if 'a' <= b && b <= 'z' { + needs = true + break + } + } + + if !needs { + return bs + } + + out := make(Bytes, len(bs)) + + for i, b := range bs { + if 'a' <= b && b <= 'z' { + out[i] = b - ('a' - 'A') + } else { + out[i] = b + } + } + + return out +} + +// Print writes the content of the Bytes to the standard output (console) +// and returns the Bytes unchanged. +func (bs Bytes) Print() Bytes { fmt.Print(bs); return bs } + +// Println writes the content of the Bytes to the standard output (console) with a newline +// and returns the Bytes unchanged. +func (bs Bytes) Println() Bytes { fmt.Println(bs); return bs } diff --git a/backend/vendor/github.com/enetx/g/bytes_hash.go b/backend/vendor/github.com/enetx/g/bytes_hash.go new file mode 100644 index 0000000..053dfd8 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/bytes_hash.go @@ -0,0 +1,39 @@ +package g + +import ( + "crypto/md5" + "crypto/sha1" + "crypto/sha256" + "crypto/sha512" + "encoding/hex" + "hash" +) + +// A struct that wraps an Bytes for hashing. +type bhash struct{ bytes Bytes } + +// Hash returns a bhash struct wrapping the given Bytes. +func (bs Bytes) Hash() bhash { return bhash{bs} } + +// MD5 computes the MD5 hash of the wrapped Bytes and returns the hash as an Bytes. +func (bh bhash) MD5() Bytes { return bytesHasher(md5.New(), bh.bytes) } + +// SHA1 computes the SHA1 hash of the wrapped Bytes and returns the hash as an Bytes. +func (bh bhash) SHA1() Bytes { return bytesHasher(sha1.New(), bh.bytes) } + +// SHA256 computes the SHA256 hash of the wrapped Bytes and returns the hash as an Bytes. +func (bh bhash) SHA256() Bytes { return bytesHasher(sha256.New(), bh.bytes) } + +// SHA512 computes the SHA512 hash of the wrapped Bytes and returns the hash as an Bytes. +func (bh bhash) SHA512() Bytes { return bytesHasher(sha512.New(), bh.bytes) } + +// bytesHasher a helper function that computes the hash of the given Bytes using the specified +// hash.Hash algorithm and returns the hash as an Bytes. +func bytesHasher(h hash.Hash, bs Bytes) Bytes { + _, _ = h.Write(bs) + sum := h.Sum(nil) + out := make(Bytes, hex.EncodedLen(len(sum))) + hex.Encode(out, sum) + + return out +} diff --git a/backend/vendor/github.com/enetx/g/bytes_regexp.go b/backend/vendor/github.com/enetx/g/bytes_regexp.go new file mode 100644 index 0000000..cbf3344 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/bytes_regexp.go @@ -0,0 +1,125 @@ +package g + +import ( + "regexp" + + "github.com/enetx/g/f" +) + +// regexps struct wraps a Bytes and provides regex-related methods. +type regexpb struct{ bytes Bytes } + +// Regexp wraps a Bytes into an re struct to provide regex-related methods. +func (bs Bytes) Regexp() regexpb { return regexpb{bs} } + +// Find searches the Bytes for the first occurrence of the regular expression pattern +// and returns an Option[Bytes] containing the matched substring. +// If no match is found, the Option[Bytes] will be None. +func (r regexpb) Find(pattern *regexp.Regexp) Option[Bytes] { + result := Bytes(pattern.Find(r.bytes)) + if result.Empty() { + return None[Bytes]() + } + + return Some(result) +} + +// Match checks if the Bytes contains a match for the specified regular expression pattern. +func (r regexpb) Match(pattern *regexp.Regexp) bool { return f.Match[Bytes](pattern)(r.bytes) } + +// MatchAny checks if the Bytes contains a match for any of the specified regular +// expression patterns. +func (r regexpb) MatchAny(patterns ...*regexp.Regexp) bool { + return Slice[*regexp.Regexp](patterns). + Iter(). + Any(func(pattern *regexp.Regexp) bool { return r.Match(pattern) }) +} + +// MatchAll checks if the Bytes contains a match for all of the specified regular expression patterns. +func (r regexpb) MatchAll(patterns ...*regexp.Regexp) bool { + return Slice[*regexp.Regexp](patterns). + Iter(). + All(func(pattern *regexp.Regexp) bool { return r.Match(pattern) }) +} + +// Index searches for the first occurrence of the regular expression pattern in the Bytes. +// If a match is found, it returns an Option containing an Slice with the start and end indices of the match. +// If no match is found, it returns None. +func (r regexpb) Index(pattern *regexp.Regexp) Option[Slice[Int]] { + result := TransformSlice(pattern.FindIndex(r.bytes), NewInt) + if result.Empty() { + return None[Slice[Int]]() + } + + return Some(result) +} + +// FindAll searches the Bytes for all occurrences of the regular expression pattern +// and returns an Option[Slice[Bytes]] containing a slice of matched substrings. +// If no matches are found, the Option[Slice[Bytes]] will be None. +func (r regexpb) FindAll(pattern *regexp.Regexp) Option[Slice[Bytes]] { + return r.FindAllN(pattern, -1) +} + +// FindAllN searches the Bytes for up to n occurrences of the regular expression pattern +// and returns an Option[Slice[Bytes]] containing a slice of matched substrings. +// If no matches are found, the Option[Slice[Bytes]] will be None. +// If n is negative, all occurrences will be returned. +func (r regexpb) FindAllN(pattern *regexp.Regexp, n Int) Option[Slice[Bytes]] { + result := TransformSlice(pattern.FindAll(r.bytes, n.Std()), func(bs []byte) Bytes { return Bytes(bs) }) + if result.Empty() { + return None[Slice[Bytes]]() + } + + return Some(result) +} + +// FindSubmatch searches the Bytes for the first occurrence of the regular expression pattern +// and returns an Option[Slice[Bytes]] containing the matched substrings and submatches. +// The Option[Slice[Bytes]] will contain an Slice[Bytes] for each match, +// where each Slice[Bytes] will contain the full match at index 0, followed by any captured submatches. +// If no match is found, the Option[Slice[Bytes]] will be None. +func (r regexpb) FindSubmatch(pattern *regexp.Regexp) Option[Slice[Bytes]] { + result := TransformSlice(pattern.FindSubmatch(r.bytes), func(bs []byte) Bytes { return Bytes(bs) }) + if result.Empty() { + return None[Slice[Bytes]]() + } + + return Some(result) +} + +// FindAllSubmatch searches the Bytes for all occurrences of the regular expression pattern +// and returns an Option[Slice[Slice[Bytes]]] containing the matched substrings and submatches. +// The Option[Slice[Slice[Bytes]]] will contain an Slice[Bytes] for each match, +// where each Slice[Bytes] will contain the full match at index 0, followed by any captured submatches. +// If no match is found, the Option[Slice[Slice[Bytes]]] will be None. +// This method is equivalent to calling SubmatchAllRegexpN with n = -1, which means it finds all occurrences. +func (r regexpb) FindAllSubmatch(pattern *regexp.Regexp) Option[Slice[Slice[Bytes]]] { + return r.FindAllSubmatchN(pattern, -1) +} + +// FindAllSubmatchN searches the Bytes for occurrences of the regular expression pattern +// and returns an Option[Slice[Slice[Bytes]]] containing the matched substrings and submatches. +// The Option[Slice[Slice[Bytes]]] will contain an Slice[Bytes] for each match, +// where each Slice[Bytes] will contain the full match at index 0, followed by any captured submatches. +// If no match is found, the Option[Slice[Slice[Bytes]]] will be None. +// The 'n' parameter specifies the maximum number of matches to find. If n is negative, it finds all occurrences. +func (r regexpb) FindAllSubmatchN(pattern *regexp.Regexp, n Int) Option[Slice[Slice[Bytes]]] { + var result Slice[Slice[Bytes]] + + for _, v := range pattern.FindAllSubmatch(r.bytes, n.Std()) { + result = append(result, TransformSlice(v, func(bs []byte) Bytes { return Bytes(bs) })) + } + + if result.Empty() { + return None[Slice[Slice[Bytes]]]() + } + + return Some(result) +} + +// Replace replaces all occurrences of the regular expression matches in the Bytes +// with the provided newB and returns the resulting Bytes after the replacement. +func (r regexpb) Replace(pattern *regexp.Regexp, newB Bytes) Bytes { + return pattern.ReplaceAll(r.bytes, newB) +} diff --git a/backend/vendor/github.com/enetx/g/cell/cell.go b/backend/vendor/github.com/enetx/g/cell/cell.go new file mode 100644 index 0000000..2c178da --- /dev/null +++ b/backend/vendor/github.com/enetx/g/cell/cell.go @@ -0,0 +1,81 @@ +package cell + +import ( + "sync" + "unsafe" +) + +// Cell is a thread-safe wrapper around a value T. +// It provides safe concurrent access through a read-write mutex. +type Cell[T any] struct { + mu sync.RWMutex + val T +} + +// New creates a new Cell with the provided value. +// +// Example: +// +// c := cell.New(42) +// config := cell.New(Config{Port: 8080, Debug: false}) +func New[T any](val T) *Cell[T] { + return &Cell[T]{val: val} +} + +// Get returns the current value stored in the Cell. +func (c *Cell[T]) Get() T { + c.mu.RLock() + defer c.mu.RUnlock() + + return c.val +} + +// Set replaces the current value with the given value. +func (c *Cell[T]) Set(value T) { + c.mu.Lock() + defer c.mu.Unlock() + + c.val = value +} + +// Replace atomically replaces the current value with the new one +// and returns the previous value. +func (c *Cell[T]) Replace(new T) T { + c.mu.Lock() + defer c.mu.Unlock() + + old := c.val + c.val = new + + return old +} + +// Swap swaps the values of two cells. +func (c *Cell[T]) Swap(other *Cell[T]) { + if c == other { + return + } + + first, second := c, other + if uintptr(unsafe.Pointer(c)) > uintptr(unsafe.Pointer(other)) { + first, second = other, c + } + + first.mu.Lock() + defer first.mu.Unlock() + + second.mu.Lock() + defer second.mu.Unlock() + + c.val, other.val = other.val, c.val +} + +// Update atomically updates the value using the provided function. +// The function receives the current value and should return the new value. +// This operation is atomic and thread-safe. +func (c *Cell[T]) Update(fn func(T) T) { + c.mu.Lock() + defer c.mu.Unlock() + + c.val = fn(c.val) +} diff --git a/backend/vendor/github.com/enetx/g/cell/lazy.go b/backend/vendor/github.com/enetx/g/cell/lazy.go new file mode 100644 index 0000000..0ed8a6d --- /dev/null +++ b/backend/vendor/github.com/enetx/g/cell/lazy.go @@ -0,0 +1,68 @@ +package cell + +import ( + "sync" + + . "github.com/enetx/g" +) + +// LazyCell is a thread-safe, lazy-initialization wrapper around a computation. +// The computation function is executed at most once, on the first call to Force(). +// Subsequent calls return the cached result. +// Internally uses Cell for thread-safe operations. +type LazyCell[T any] struct { + cell *Cell[Option[T]] + fn func() T + once sync.Once +} + +// NewLazy creates a new LazyCell wrapper around the given computation function. +// +// The function will not be executed until the first call to Force(). +// The function should be idempotent and side-effect free for predictable behavior. +// +// Example: +// +// expensive := cell.NewLazy(func() int { +// time.Sleep(1 * time.Second) +// return 42 +// }) +// +// // Function not called yet +// result := expensive.Force() // Function called here +// result2 := expensive.Force() // Cached result returned +func NewLazy[T any](fn func() T) *LazyCell[T] { + return &LazyCell[T]{ + cell: New(None[T]()), + fn: fn, + } +} + +// Force executes the computation function (if not already executed) and returns the result. +// +// The function is guaranteed to be called at most once, even in concurrent scenarios. +// All subsequent calls return the same cached value. +// +// This method is thread-safe and can be called from multiple goroutines concurrently. +func (l *LazyCell[T]) Force() T { + l.once.Do(func() { + result := l.fn() + l.cell.Set(Some(result)) + }) + + return l.cell.Get().Some() +} + +// Get returns Some(value) if the lazy value has been computed, None otherwise. +// This method never triggers the computation - it only returns already computed results. +// +// Example: +// +// if val := lazy.Get(); val.IsSome() { +// fmt.Println("Already computed:", val.Some()) +// } else { +// fmt.Println("Not computed yet") +// } +func (l *LazyCell[T]) Get() Option[T] { + return l.cell.Get() +} diff --git a/backend/vendor/github.com/enetx/g/cell/once.go b/backend/vendor/github.com/enetx/g/cell/once.go new file mode 100644 index 0000000..4fc4f9b --- /dev/null +++ b/backend/vendor/github.com/enetx/g/cell/once.go @@ -0,0 +1,130 @@ +package cell + +import ( + "errors" + "sync" + + . "github.com/enetx/g" +) + +// OnceCell is a thread-safe cell which can be set exactly once. +// After being set, it provides immutable access to the stored value. +// This is equivalent to Rust's OnceCell. +type OnceCell[T any] struct { + cell *Cell[Option[T]] + once sync.Once + set bool +} + +// NewOnce creates a new empty OnceCell. +// +// Example: +// +// cell := cell.NewOnce[int]() +// result := cell.Set(42) +// if result.IsOk() { +// println("Value set successfully") +// } +// value := cell.Get() +// if value.IsSome() { +// println("Value:", value.Some()) +// } +func NewOnce[T any]() *OnceCell[T] { + return &OnceCell[T]{ + cell: New(None[T]()), + set: false, + } +} + +// Set attempts to store a value in the cell. +// Returns Ok(()) if the value was stored, Err if the cell was already set. +// This operation is thread-safe and will succeed for exactly one caller. +// +// Example: +// +// cell := cell.NewOnce[string]() +// result := cell.Set("hello") // Returns Ok(()) +// result2 := cell.Set("world") // Returns Err("value already set") +func (o *OnceCell[T]) Set(value T) Result[Unit] { + success := false + + o.once.Do(func() { + o.cell.Set(Some(value)) + o.set = true + success = true + }) + + if success { + return Ok(Unit{}) + } + + return Err[Unit](errors.New("value already set")) +} + +// Get returns Some(value) if the cell has been set, None otherwise. +// This method never blocks and is very fast after the cell has been set. +// +// Example: +// +// cell := cell.NewOnce[int]() +// val := cell.Get() +// if val.IsNone() { +// println("Cell is empty") +// } +// cell.Set(42) +// val = cell.Get() +// println("Value:", val.Some()) // Prints: Value: 42 +func (o *OnceCell[T]) Get() Option[T] { + return o.cell.Get() +} + +// GetOrInit returns the value if the cell has been set, or sets and returns +// the result of calling the init function. The init function is guaranteed +// to be called at most once. +// +// Example: +// +// cell := cell.NewOnce[string]() +// value := cell.GetOrInit(func() string { +// return "initialized" +// }) +// println(value) // Prints: initialized +// +// value2 := cell.GetOrInit(func() string { +// return "this won't be called" +// }) +// println(value2) // Prints: initialized +func (o *OnceCell[T]) GetOrInit(init func() T) T { + if current := o.cell.Get(); current.IsSome() { + return current.Some() + } + + o.once.Do(func() { + if !o.set { + value := init() + o.cell.Set(Some(value)) + o.set = true + } + }) + + return o.cell.Get().Some() +} + +// Take removes and returns the value from the cell, if it has been set. +// After calling this method, the cell becomes empty. +// +// Example: +// +// cell := cell.NewOnce[int]() +// cell.Set(42) +// value := cell.Take() +// println(value.Some()) // 42 +// println(cell.Get().IsNone()) // true +func (o *OnceCell[T]) Take() Option[T] { + current := o.cell.Get() + if current.IsSome() { + o.cell.Set(None[T]()) + } + + return current +} diff --git a/backend/vendor/github.com/enetx/g/cmp/cmp.go b/backend/vendor/github.com/enetx/g/cmp/cmp.go new file mode 100644 index 0000000..d3e1c9f --- /dev/null +++ b/backend/vendor/github.com/enetx/g/cmp/cmp.go @@ -0,0 +1,9 @@ +package cmp + +import "cmp" + +// Cmp compares two ordered values and returns the result as an Ordering value. +func Cmp[T cmp.Ordered](x, y T) Ordering { return Ordering(cmp.Compare(x, y)) } + +// Reverse compares two ordered values and returns the inverse of Cmp as an Ordering. +func Reverse[T cmp.Ordered](x, y T) Ordering { return Ordering(cmp.Compare(x, y)).Reverse() } diff --git a/backend/vendor/github.com/enetx/g/cmp/maxmin.go b/backend/vendor/github.com/enetx/g/cmp/maxmin.go new file mode 100644 index 0000000..2f58ec1 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/cmp/maxmin.go @@ -0,0 +1,47 @@ +package cmp + +import "cmp" + +// Min returns the minimum value among the given values. The values must be of a type that implements +// the cmp.Ordered interface for comparison. +func Min[T cmp.Ordered](t ...T) T { return MinBy(Cmp, t...) } + +// Max returns the maximum value among the given values. The values must be of a type that implements +// the cmp.Ordered interface for comparison. +func Max[T cmp.Ordered](t ...T) T { return MaxBy(Cmp, t...) } + +// MinBy finds the minimum value in the collection t according to the provided comparison function fn. +// It returns the minimum value found. +func MinBy[T any](fn func(x, y T) Ordering, t ...T) T { + if len(t) == 0 { + return *new(T) + } + + m := t[0] + + for _, v := range t[1:] { + if fn(v, m).IsLt() { + m = v + } + } + + return m +} + +// MaxBy finds the maximum value in the collection t according to the provided comparison function fn. +// It returns the maximum value found. +func MaxBy[T any](fn func(x, y T) Ordering, t ...T) T { + if len(t) == 0 { + return *new(T) + } + + m := t[0] + + for _, v := range t[1:] { + if fn(v, m).IsGt() { + m = v + } + } + + return m +} diff --git a/backend/vendor/github.com/enetx/g/cmp/ordering.go b/backend/vendor/github.com/enetx/g/cmp/ordering.go new file mode 100644 index 0000000..4692f86 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/cmp/ordering.go @@ -0,0 +1,56 @@ +package cmp + +import "fmt" + +// Ordering is the result of a comparison between two values. +type Ordering int + +const ( + Less Ordering = iota - 1 // Less represents an ordered value where a compared value is less than another. + Equal // Equal represents an ordered value where a compared value is equal to another. + Greater // Greater represents an ordered value where a compared value is greater than another. +) + +// Then returns the receiver if it's equal to Equal, otherwise returns the receiver. +func (o Ordering) Then(other Ordering) Ordering { + if o.IsEq() { + return other + } + + return o +} + +// Reverse reverses the ordering. +func (o Ordering) Reverse() Ordering { + switch o { + case Less: + return Greater + case Greater: + return Less + default: + return Equal + } +} + +// IsLt returns true if the Ordering value is Less. +func (o Ordering) IsLt() bool { return Less == o } + +// IsEq returns true if the Ordering value is Equal. +func (o Ordering) IsEq() bool { return Equal == o } + +// IsGt returns true if the Ordering value is Greater. +func (o Ordering) IsGt() bool { return Greater == o } + +// String returns the string representation of the Ordering value. +func (o Ordering) String() string { + switch o { + case Less: + return "Less" + case Equal: + return "Equal" + case Greater: + return "Greater" + default: + return fmt.Sprintf("Unknown Ordering value: %d", int(o)) + } +} diff --git a/backend/vendor/github.com/enetx/g/constraints/constraints.go b/backend/vendor/github.com/enetx/g/constraints/constraints.go new file mode 100644 index 0000000..5a5b5e6 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/constraints/constraints.go @@ -0,0 +1,10 @@ +package constraints + +type Float interface { + ~float32 | ~float64 +} + +type Integer interface { + ~int | ~int8 | ~int16 | ~int32 | ~int64 | + ~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr +} diff --git a/backend/vendor/github.com/enetx/g/deque.go b/backend/vendor/github.com/enetx/g/deque.go new file mode 100644 index 0000000..f58efc1 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/deque.go @@ -0,0 +1,599 @@ +package g + +import ( + "fmt" + + "github.com/enetx/g/cmp" + "github.com/enetx/g/f" +) + +// NewDeque creates a new Deque of the given generic type T with the specified capacity. +// The capacity parameter specifies the initial capacity of the underlying slice. +// If no capacity is provided, an empty Deque with a capacity of 0 is returned. +// +// Parameters: +// +// - capacity ...Int: An optional parameter specifying the initial capacity of the Deque +// +// Returns: +// +// - Deque[T]: A new Deque of the specified generic type T with the given capacity +// +// Example usage: +// +// d1 := g.NewDeque[int]() // Creates an empty Deque of type int +// d2 := g.NewDeque[int](10) // Creates an empty Deque with capacity of 10 +func NewDeque[T any](capacity ...Int) *Deque[T] { + cap := Int(0) + + if len(capacity) > 0 { + cap = capacity[0] + } + + return &Deque[T]{ + data: make(Slice[T], cap), + front: 0, + len: 0, + } +} + +// DequeOf creates a new Deque containing the provided elements. +func DequeOf[T any](elements ...T) *Deque[T] { + dq := NewDeque[T](Int(len(elements))) + + for _, elem := range elements { + dq.PushBack(elem) + } + + return dq +} + +// Len returns the number of elements in the Deque. +func (dq *Deque[T]) Len() Int { + return dq.len +} + +// IsEmpty returns true if the Deque contains no elements. +func (dq *Deque[T]) IsEmpty() bool { + return dq.len == 0 +} + +// Capacity returns the current capacity of the Deque. +func (dq *Deque[T]) Capacity() Int { + return Int(len(dq.data)) +} + +// realIndex converts a logical index to the actual index in the ring buffer. +func (dq *Deque[T]) realIndex(index Int) Int { + return (dq.front + index) % Int(len(dq.data)) +} + +// grow expands the capacity of the Deque when needed. +func (dq *Deque[T]) grow() { + oldCap := Int(len(dq.data)) + newCap := oldCap * 2 + if newCap == 0 { + newCap = 4 + } + + newData := make(Slice[T], newCap) + + for i := Int(0); i < dq.len; i++ { + newData[i] = dq.data[dq.realIndex(i)] + } + + dq.data = newData + dq.front = 0 +} + +// PushFront adds an element to the front of the Deque. +func (dq *Deque[T]) PushFront(value T) { + if dq.len == Int(len(dq.data)) { + dq.grow() + } + + dq.front = (dq.front - 1 + Int(len(dq.data))) % Int(len(dq.data)) + dq.data[dq.front] = value + dq.len++ +} + +// PushBack adds an element to the back of the Deque. +func (dq *Deque[T]) PushBack(value T) { + if dq.len == Int(len(dq.data)) { + dq.grow() + } + + backIndex := dq.realIndex(dq.len) + dq.data[backIndex] = value + dq.len++ +} + +// PopFront removes and returns the first element of the Deque. +// Returns None if the Deque is empty. +func (dq *Deque[T]) PopFront() Option[T] { + if dq.IsEmpty() { + return None[T]() + } + + value := dq.data[dq.front] + var zero T + dq.data[dq.front] = zero + dq.front = (dq.front + 1) % Int(len(dq.data)) + dq.len-- + + return Some(value) +} + +// PopBack removes and returns the last element of the Deque. +// Returns None if the Deque is empty. +func (dq *Deque[T]) PopBack() Option[T] { + if dq.IsEmpty() { + return None[T]() + } + + dq.len-- + backIndex := dq.realIndex(dq.len) + value := dq.data[backIndex] + var zero T + dq.data[backIndex] = zero + + return Some(value) +} + +// Front returns a reference to the first element. +// Returns None if the Deque is empty. +func (dq *Deque[T]) Front() Option[T] { + if dq.IsEmpty() { + return None[T]() + } + + return Some(dq.data[dq.front]) +} + +// Back returns a reference to the last element. +// Returns None if the Deque is empty. +func (dq *Deque[T]) Back() Option[T] { + if dq.IsEmpty() { + return None[T]() + } + + backIndex := dq.realIndex(dq.len - 1) + + return Some(dq.data[backIndex]) +} + +// Get retrieves an element at the specified index. +// Index 0 represents the front of the Deque. +// Returns None if the index is out of bounds. +func (dq *Deque[T]) Get(index Int) Option[T] { + if index < 0 || index >= dq.len { + return None[T]() + } + + realIdx := dq.realIndex(index) + + return Some(dq.data[realIdx]) +} + +// Set sets the element at the specified index. +// Index 0 represents the front of the Deque. +// Returns true if the index is valid, false otherwise. +func (dq *Deque[T]) Set(index Int, value T) bool { + if index < 0 || index >= dq.len { + return false + } + + realIdx := dq.realIndex(index) + dq.data[realIdx] = value + + return true +} + +// Insert inserts an element at the specified index. +// Index 0 represents the front of the Deque. +// Panics if the index is out of bounds. +func (dq *Deque[T]) Insert(index Int, value T) { + if index < 0 || index > dq.len { + panic(fmt.Sprintf("index out of bounds: %d", index)) + } + + if index == 0 { + dq.PushFront(value) + return + } + + if index == dq.len { + dq.PushBack(value) + return + } + + if index <= dq.len/2 { + if dq.len == Int(len(dq.data)) { + dq.grow() + } + + dq.front = (dq.front - 1 + Int(len(dq.data))) % Int(len(dq.data)) + dq.len++ + + for i := range index { + dq.data[dq.realIndex(i)] = dq.data[dq.realIndex(i+1)] + } + + dq.data[dq.realIndex(index)] = value + } else { + if dq.len == Int(len(dq.data)) { + dq.grow() + } + + dq.len++ + + for i := dq.len - 1; i > index; i-- { + dq.data[dq.realIndex(i)] = dq.data[dq.realIndex(i-1)] + } + + dq.data[dq.realIndex(index)] = value + } +} + +// Remove removes and returns the element at the specified index. +// Returns None if the index is out of bounds. +func (dq *Deque[T]) Remove(index Int) Option[T] { + if index < 0 || index >= dq.len { + return None[T]() + } + + if index == 0 { + return dq.PopFront() + } + + if index == dq.len-1 { + return dq.PopBack() + } + + realIdx := dq.realIndex(index) + value := dq.data[realIdx] + + if index <= dq.len/2 { + for i := index; i > 0; i-- { + dq.data[dq.realIndex(i)] = dq.data[dq.realIndex(i-1)] + } + var zero T + dq.data[dq.front] = zero + dq.front = (dq.front + 1) % Int(len(dq.data)) + } else { + for i := index; i < dq.len-1; i++ { + dq.data[dq.realIndex(i)] = dq.data[dq.realIndex(i+1)] + } + var zero T + backIdx := dq.realIndex(dq.len - 1) + dq.data[backIdx] = zero + } + + dq.len-- + + return Some(value) +} + +// Clear removes all elements from the Deque. +func (dq *Deque[T]) Clear() { + var zero T + + for i := Int(0); i < dq.len; i++ { + dq.data[dq.realIndex(i)] = zero + } + + dq.front = 0 + dq.len = 0 +} + +// Swap swaps the elements at indices i and j. +// Panics if either index is out of bounds. +func (dq *Deque[T]) Swap(i, j Int) { + if i < 0 || i >= dq.len || j < 0 || j >= dq.len { + panic("index out of bounds") + } + + realI := dq.realIndex(i) + realJ := dq.realIndex(j) + + dq.data[realI], dq.data[realJ] = dq.data[realJ], dq.data[realI] +} + +// RotateLeft rotates the Deque in-place such that the first mid elements +// move to the end while the last len - mid elements move to the front. +func (dq *Deque[T]) RotateLeft(mid Int) { + if dq.len == 0 { + return + } + + mid = mid % dq.len + if mid == 0 { + return + } + + contiguous := dq.MakeContiguous() + + temp := make(Slice[T], mid) + copy(temp, contiguous[:mid]) + copy(contiguous, contiguous[mid:]) + copy(contiguous[dq.len-mid:], temp) +} + +// RotateRight rotates the Deque in-place such that the first len - k elements +// move to the end while the last k elements move to the front. +func (dq *Deque[T]) RotateRight(k Int) { + if dq.len == 0 { + return + } + + k = k % dq.len + if k == 0 { + return + } + + dq.RotateLeft(dq.len - k) +} + +// MakeContiguous rearranges the internal storage of the Deque so that its elements +// are in contiguous memory. Returns a slice that contains all elements. +func (dq *Deque[T]) MakeContiguous() Slice[T] { + if dq.len == 0 { + return Slice[T]{} + } + + if dq.front+dq.len <= Int(len(dq.data)) { + return dq.data[dq.front : dq.front+dq.len] + } + + newData := make(Slice[T], len(dq.data)) + for i := Int(0); i < dq.len; i++ { + newData[i] = dq.data[dq.realIndex(i)] + } + + dq.data = newData + dq.front = 0 + + return dq.data[:dq.len] +} + +// Clone creates a deep copy of the Deque. +func (dq *Deque[T]) Clone() *Deque[T] { + newDeque := NewDeque[T](dq.Capacity()) + + for i := Int(0); i < dq.len; i++ { + newDeque.PushBack(dq.data[dq.realIndex(i)]) + } + + return newDeque +} + +// Iter returns an iterator for the Deque, allowing for sequential iteration +// over its elements from front to back. +func (dq *Deque[T]) Iter() SeqDeque[T] { + return func(yield func(T) bool) { + for i := Int(0); i < dq.len; i++ { + value := dq.data[dq.realIndex(i)] + if !yield(value) { + return + } + } + } +} + +// IterReverse returns an iterator for the Deque that allows for sequential iteration +// over its elements in reverse order (from back to front). +func (dq *Deque[T]) IterReverse() SeqDeque[T] { + return func(yield func(T) bool) { + for i := dq.len - 1; i >= 0; i-- { + value := dq.data[dq.realIndex(i)] + if !yield(value) { + return + } + } + } +} + +// Reserve ensures that the Deque can hold at least the specified number of elements +// without reallocating. If the current capacity is already sufficient, this is a no-op. +func (dq *Deque[T]) Reserve(additional Int) { + required := dq.len + additional + if required <= Int(len(dq.data)) { + return + } + + newCap := Int(len(dq.data)) + if newCap == 0 { + newCap = 4 + } + + for newCap < required { + newCap *= 2 + } + + newData := make(Slice[T], newCap) + for i := Int(0); i < dq.len; i++ { + newData[i] = dq.data[dq.realIndex(i)] + } + + dq.data = newData + dq.front = 0 +} + +// ShrinkToFit shrinks the capacity of the Deque as much as possible. +func (dq *Deque[T]) ShrinkToFit() { + if dq.len == 0 { + dq.data = Slice[T]{} + dq.front = 0 + + return + } + + if Int(len(dq.data)) == dq.len { + return + } + + newData := make(Slice[T], dq.len) + for i := Int(0); i < dq.len; i++ { + newData[i] = dq.data[dq.realIndex(i)] + } + + dq.data = newData + dq.front = 0 +} + +// Contains checks if the Deque contains the specified value. +func (dq *Deque[T]) Contains(value T) bool { + var zero T + + if f.IsComparable(zero) { + for i := Int(0); i < dq.len; i++ { + if f.Eq[any](dq.data[dq.realIndex(i)])(value) { + return true + } + } + } else { + for i := Int(0); i < dq.len; i++ { + if f.Eqd(value)(dq.data[dq.realIndex(i)]) { + return true + } + } + } + + return false +} + +// Index returns the index of the first occurrence of the specified value, +// or -1 if not found. +func (dq *Deque[T]) Index(value T) Int { + var zero T + + if f.IsComparable(zero) { + for i := Int(0); i < dq.len; i++ { + if f.Eq[any](dq.data[dq.realIndex(i)])(value) { + return i + } + } + } else { + for i := Int(0); i < dq.len; i++ { + if f.Eqd(value)(dq.data[dq.realIndex(i)]) { + return i + } + } + } + + return -1 +} + +// BinarySearch searches for a value in a sorted Deque using binary search. +// Returns the index where the value is found, or where it should be inserted. +func (dq *Deque[T]) BinarySearch(value T, fn func(T, T) cmp.Ordering) (Int, bool) { + contiguous := dq.MakeContiguous() + + left, right := Int(0), dq.len + for left < right { + mid := (left + right) / 2 + result := fn(contiguous[mid], value) + + switch result { + case cmp.Less: + left = mid + 1 + case cmp.Greater: + right = mid + case cmp.Equal: + return mid, true + } + } + + return left, false +} + +// ToSlice converts the Deque to a Slice, maintaining element order. +func (dq *Deque[T]) ToSlice() Slice[T] { + result := make(Slice[T], dq.len) + + for i := Int(0); i < dq.len; i++ { + result[i] = dq.data[dq.realIndex(i)] + } + + return result +} + +// String returns a string representation of the Deque. +func (dq Deque[T]) String() string { + if dq.IsEmpty() { + return "Deque[]" + } + + var b Builder + b.WriteString("Deque[") + + for i := Int(0); i < dq.len; i++ { + if i > 0 { + b.WriteString(", ") + } + + b.WriteString(Format("{}", dq.data[dq.realIndex(i)])) + } + + b.WriteString("]") + + return b.String().Std() +} + +// Eq checks if two Deques are equal. +func (dq *Deque[T]) Eq(other *Deque[T]) bool { + if dq.len != other.len { + return false + } + + var zero T + if f.IsComparable(zero) { + for i := Int(0); i < dq.len; i++ { + a := dq.data[dq.realIndex(i)] + b := other.data[other.realIndex(i)] + if !f.Eq[any](a)(b) { + return false + } + } + } else { + for i := Int(0); i < dq.len; i++ { + a := dq.data[dq.realIndex(i)] + b := other.data[other.realIndex(i)] + if !f.Eqd(a)(b) { + return false + } + } + } + + return true +} + +// Retain keeps only the elements specified by the predicate. +func (dq *Deque[T]) Retain(predicate func(T) bool) { + writePos := Int(0) + + for i := Int(0); i < dq.len; i++ { + value := dq.data[dq.realIndex(i)] + if predicate(value) { + if writePos != i { + dq.data[dq.realIndex(writePos)] = value + } + writePos++ + } + } + + var zero T + for i := writePos; i < dq.len; i++ { + dq.data[dq.realIndex(i)] = zero + } + + dq.len = writePos +} + +// Print writes the elements of the Deque to the standard output (console) +// and returns the Deque unchanged. +func (dq *Deque[T]) Print() *Deque[T] { fmt.Print(dq); return dq } + +// Println writes the elements of the Deque to the standard output (console) with a newline +// and returns the Deque unchanged. +func (dq *Deque[T]) Println() *Deque[T] { fmt.Println(dq); return dq } diff --git a/backend/vendor/github.com/enetx/g/deque_iter.go b/backend/vendor/github.com/enetx/g/deque_iter.go new file mode 100644 index 0000000..0a1895b --- /dev/null +++ b/backend/vendor/github.com/enetx/g/deque_iter.go @@ -0,0 +1,967 @@ +package g + +import ( + "context" + "reflect" + "runtime" + + "github.com/enetx/g/cmp" + "github.com/enetx/g/f" + "github.com/enetx/iter" +) + +// Pull converts the "push-style" iterator sequence seq +// into a "pull-style" iterator accessed by the two functions +// next and stop. +// +// Next returns the next value in the sequence +// and a boolean indicating whether the value is valid. +// When the sequence is over, next returns the zero V and false. +// It is valid to call next after reaching the end of the sequence +// or after calling stop. These calls will continue +// to return the zero V and false. +// +// Stop ends the iteration. It must be called when the caller is +// no longer interested in next values and next has not yet +// signaled that the sequence is over (with a false boolean return). +// It is valid to call stop multiple times and when next has +// already returned false. +// +// It is an error to call next or stop from multiple goroutines +// simultaneously. +func (seq SeqDeque[V]) Pull() (func() (V, bool), func()) { return iter.Pull(iter.Seq[V](seq)) } + +// Parallel converts a sequential deque iterator into a parallel iterator with the specified number of workers. +// If no worker count is provided, it defaults to the number of CPU cores. +// The parallel iterator processes elements concurrently using a worker pool. +func (seq SeqDeque[V]) Parallel(workers ...Int) SeqDequePar[V] { + numCPU := Int(runtime.NumCPU()) + count := Slice[Int](workers).Get(0).UnwrapOr(numCPU) + + if count.Lte(0) { + count = numCPU + } + + return SeqDequePar[V]{ + seq: seq, + workers: count, + process: func(v V) (V, bool) { return v, true }, + } +} + +// All checks whether all elements in the iterator satisfy the provided condition. +// This function is useful when you want to determine if all elements in an iterator +// meet a specific criteria. +// +// Parameters: +// - fn func(V) bool: A function that returns a boolean indicating whether the element satisfies +// the condition. +// +// Returns: +// - bool: True if all elements in the iterator satisfy the condition, false otherwise. +// +// Example usage: +// +// deque := g.DequeOf(1, 2, 3, 4, 5, 6, 7, -1, -2) +// isPositive := func(num int) bool { return num > 0 } +// allPositive := deque.Iter().All(isPositive) +// +// The resulting allPositive will be true if all elements returned by the iterator are positive. +func (seq SeqDeque[V]) All(fn func(v V) bool) bool { return iter.All(iter.Seq[V](seq), fn) } + +// Any checks whether any element in the iterator satisfies the provided condition. +// This function is useful when you want to determine if at least one element in an iterator +// meets a specific criteria. +// +// Parameters: +// - fn func(V) bool: A function that returns a boolean indicating whether the element satisfies +// the condition. +// +// Returns: +// - bool: True if at least one element in the iterator satisfies the condition, false otherwise. +// +// Example usage: +// +// deque := g.DequeOf(1, 3, 5, 7, 9) +// isEven := func(num int) bool { return num%2 == 0 } +// anyEven := deque.Iter().Any(isEven) +// +// The resulting anyEven will be true if at least one element returned by the iterator is even. +func (seq SeqDeque[V]) Any(fn func(V) bool) bool { return iter.Any(iter.Seq[V](seq), fn) } + +// Chain concatenates the current iterator with other iterators, returning a new iterator. +// +// The function creates a new iterator that combines the elements of the current iterator +// with elements from the provided iterators in the order they are given. +// +// Params: +// +// - seqs ([]SeqDeque[V]): Other iterators to be concatenated with the current iterator. +// +// Returns: +// +// - SeqDeque[V]: A new iterator containing elements from the current iterator and the provided iterators. +// +// Example usage: +// +// iter1 := g.DequeOf(1, 2, 3).Iter() +// iter2 := g.DequeOf(4, 5, 6).Iter() +// iter1.Chain(iter2).Collect().Print() +// +// Output: Deque[1, 2, 3, 4, 5, 6] +// +// The resulting iterator will contain elements from both iterators in the specified order. +func (seq SeqDeque[V]) Chain(seqs ...SeqDeque[V]) SeqDeque[V] { + iterSeqs := make([]iter.Seq[V], len(seqs)) + for i, s := range seqs { + iterSeqs[i] = iter.Seq[V](s) + } + + return SeqDeque[V](iter.Chain(iter.Seq[V](seq), iterSeqs...)) +} + +// Chunks returns an iterator that yields chunks of elements of the specified size. +// +// The function creates a new iterator that yields chunks of elements from the original iterator, +// with each chunk containing elements of the specified size. +// +// Params: +// +// - n (Int): The size of each chunk. +// +// Returns: +// +// - SeqSlices[V]: An iterator yielding chunks of elements of the specified size. +// +// Example usage: +// +// deque := g.DequeOf(1, 2, 3, 4, 5, 6) +// chunks := deque.Iter().Chunks(2).Collect() +// +// Output: [Slice[1, 2] Slice[3, 4] Slice[5, 6]] +// +// The resulting iterator will yield chunks of elements, each containing the specified number of elements. +func (seq SeqDeque[V]) Chunks(n Int) SeqSlices[V] { + return SeqSlices[V](iter.Chunks(iter.Seq[V](seq), int(n))) +} + +// Collect gathers all elements from the iterator into a Deque. +func (seq SeqDeque[V]) Collect() *Deque[V] { + result := NewDeque[V]() + seq(func(v V) bool { + result.PushBack(v) + return true + }) + return result +} + +// Count consumes the iterator, counting the number of iterations and returning it. +func (seq SeqDeque[V]) Count() Int { return Int(iter.Count(iter.Seq[V](seq))) } + +// Counter returns a map where each key is a unique element +// from the deque and each value is the count of how many times that element appears. +// +// The function counts the occurrences of each element in the deque +// and returns a map representing the unique elements and their respective counts. +// This method uses iter.Counter from the iter package. +// +// Returns: +// +// - SeqMapOrd[V, Int]: with keys representing the unique elements in the deque +// and values representing the counts of those elements. +// +// Example usage: +// +// deque := g.DequeOf(1, 2, 3, 1, 2, 1) +// counts := deque.Iter().Counter() +// // The counts map will contain: +// // 1 -> 3 (since 1 appears three times) +// // 2 -> 2 (since 2 appears two times) +// // 3 -> 1 (since 3 appears once) +func (seq SeqDeque[V]) Counter() SeqMapOrd[any, Int] { + return func(yield func(any, Int) bool) { + for k, v := range iter.Counter(iter.Seq[V](seq)) { + if !yield(k, Int(v)) { + return + } + } + } +} + +// GroupBy groups consecutive elements of the sequence based on a custom equality function. +// +// The provided function `fn` takes two consecutive elements `a` and `b` and returns `true` +// if they belong to the same group, or `false` if a new group should start. +// The function returns a `SeqSlices[V]`, where each `[]V` represents a group of consecutive +// elements that satisfy the provided equality condition. +// +// Notes: +// - Each group is returned as a copy of the elements, since `SeqDeque` does not guarantee +// that elements share the same backing array. +// +// Parameters: +// - fn (func(a, b V) bool): Function that determines whether two consecutive elements belong to the same group. +// +// Returns: +// - SeqSlices[V]: An iterator yielding slices, each containing one group. +// +// Example usage: +// +// deque := g.DequeOf(1, 1, 2, 3, 2, 3, 4) +// groups := deque.Iter().GroupBy(func(a, b int) bool { return a <= b }).Collect() +// // Output: [Slice[1, 1, 2, 3] Slice[2, 3, 4]] +// +// The resulting iterator will yield groups of consecutive elements according to the provided function. +func (seq SeqDeque[V]) GroupBy(fn func(a, b V) bool) SeqSlices[V] { + return SeqSlices[V](iter.GroupByAdjacent(iter.Seq[V](seq), fn)) +} + +// Combinations generates all combinations of length 'n' from the sequence. +func (seq SeqDeque[V]) Combinations(size Int) SeqSlices[V] { + return SeqSlices[V](iter.Combinations(iter.Seq[V](seq), int(size))) +} + +// Cycle returns an iterator that endlessly repeats the elements of the current sequence. +func (seq SeqDeque[V]) Cycle() SeqDeque[V] { + return SeqDeque[V](iter.Cycle(iter.Seq[V](seq))) +} + +// Enumerate adds an index to each element in the iterator. +// +// Returns: +// +// - SeqMapOrd[Int, V] An iterator with each element of type Pair[Int, V], where the first +// element of the pair is the index and the second element is the original element from the +// iterator. +// +// Example usage: +// +// ps := g.DequeOf("bbb", "ddd", "xxx", "aaa", "ccc"). +// Iter(). +// Enumerate(). +// Collect() +// +// ps.Print() +// +// Output: MapOrd{0:bbb, 1:ddd, 2:xxx, 3:aaa, 4:ccc} +func (seq SeqDeque[V]) Enumerate() SeqMapOrd[Int, V] { + return func(yield func(Int, V) bool) { + iterEnum := iter.Enumerate(iter.Seq[V](seq), 0) + iterEnum(func(i int, v V) bool { + return yield(Int(i), v) + }) + } +} + +// Dedup creates a new iterator that removes consecutive duplicate elements from the original iterator, +// leaving only one occurrence of each unique element. If the iterator is sorted, all elements will be unique. +// +// Parameters: +// - None +// +// Returns: +// - SeqDeque[V]: A new iterator with consecutive duplicates removed. +// +// Example usage: +// +// deque := g.DequeOf(1, 2, 2, 3, 4, 4, 4, 5) +// iter := deque.Iter().Dedup() +// result := iter.Collect() +// result.Print() +// +// Output: Deque[1, 2, 3, 4, 5] +// +// The resulting iterator will contain only unique elements, removing consecutive duplicates. +func (seq SeqDeque[V]) Dedup() SeqDeque[V] { + return SeqDeque[V](iter.DedupBy(iter.Seq[V](seq), func(a, b V) bool { + if f.IsComparable(a) { + return f.Eq[any](a)(b) + } + return f.Eqd(a)(b) + })) +} + +// Filter returns a new iterator containing only the elements that satisfy the provided function. +// +// The function applies the provided function to each element of the iterator. +// If the function returns true for an element, that element is included in the resulting iterator. +// +// Parameters: +// +// - fn (func(V) bool): The function to be applied to each element of the iterator +// to determine if it should be included in the result. +// +// Returns: +// +// - SeqDeque[V]: A new iterator containing the elements that satisfy the given condition. +// +// Example usage: +// +// deque := g.DequeOf(1, 2, 3, 4, 5) +// even := deque.Iter(). +// Filter( +// func(val int) bool { +// return val%2 == 0 +// }). +// Collect() +// even.Print() +// +// Output: Deque[2, 4]. +// +// The resulting iterator will contain only the elements that satisfy the provided function. +func (seq SeqDeque[V]) Filter(fn func(V) bool) SeqDeque[V] { + return SeqDeque[V](iter.Filter(iter.Seq[V](seq), fn)) +} + +// Exclude returns a new iterator excluding elements that satisfy the provided function. +// +// The function applies the provided function to each element of the iterator. +// If the function returns true for an element, that element is excluded from the resulting iterator. +// +// Parameters: +// +// - fn (func(V) bool): The function to be applied to each element of the iterator +// to determine if it should be excluded from the result. +// +// Returns: +// +// - SeqDeque[V]: A new iterator containing the elements that do not satisfy the given condition. +// +// Example usage: +// +// deque := g.DequeOf(1, 2, 3, 4, 5) +// notEven := deque.Iter(). +// Exclude( +// func(val int) bool { +// return val%2 == 0 +// }). +// Collect() +// notEven.Print() +// +// Output: Deque[1, 3, 5] +// +// The resulting iterator will contain only the elements that do not satisfy the provided function. +func (seq SeqDeque[V]) Exclude(fn func(V) bool) SeqDeque[V] { + return SeqDeque[V](iter.Exclude(iter.Seq[V](seq), fn)) +} + +// Fold accumulates values in the iterator using a function. +// +// The function iterates through the elements of the iterator, accumulating values +// using the provided function and an initial value. +// +// Params: +// +// - init (V): The initial value for accumulation. +// - fn (func(V, V) V): The function that accumulates values; it takes two arguments +// of type V and returns a value of type V. +// +// Returns: +// +// - T: The accumulated value after applying the function to all elements. +// +// Example usage: +// +// deque := g.DequeOf(1, 2, 3, 4, 5) +// sum := deque.Iter(). +// Fold(0, +// func(acc, val int) int { +// return acc + val +// }) +// fmt.Println(sum) +// +// Output: 15. +// +// The resulting value will be the accumulation of elements based on the provided function. +func (seq SeqDeque[V]) Fold(init V, fn func(acc, val V) V) V { + return iter.Fold(iter.Seq[V](seq), init, fn) +} + +// Reduce aggregates elements of the sequence using the provided function. +// The first element of the sequence is used as the initial accumulator value. +// If the sequence is empty, it returns None[V]. +// +// Params: +// - fn (func(V, V) V): Function that combines two values into one. +// +// Returns: +// - Option[V]: The accumulated value wrapped in Some, or None if the sequence is empty. +// +// Example: +// +// deque := g.DequeOf(1, 2, 3, 4, 5) +// product := deque.Iter().Reduce(func(a, b int) int { return a * b }) +// if product.IsSome() { +// fmt.Println(product.Some()) // 120 +// } else { +// fmt.Println("empty") +// } +func (seq SeqDeque[V]) Reduce(fn func(a, b V) V) Option[V] { + return OptionOf(iter.Reduce(iter.Seq[V](seq), fn)) +} + +// ForEach iterates through all elements and applies the given function to each. +// +// The function applies the provided function to each element of the iterator. +// +// Params: +// +// - fn (func(V)): The function to apply to each element. +// +// Example usage: +// +// iter := g.DequeOf(1, 2, 3, 4, 5).Iter() +// iter.ForEach(func(val V) { +// fmt.Println(val) // Replace this with the function logic you need. +// }) +// +// The provided function will be applied to each element in the iterator. +func (seq SeqDeque[V]) ForEach(fn func(v V)) { iter.ForEach(iter.Seq[V](seq), fn) } + +// Flatten flattens an iterator containing slices into a single iterator. +// +// The function creates a new iterator that flattens a sequence of iterators, +// returning a single iterator containing elements from each iterator in sequence. +// +// Returns: +// +// - SeqDeque[V]: A single iterator containing elements from the sequence of iterators. +// +// Example usage: +// +// nestedDeque := g.DequeOf( +// 1, +// g.SliceOf(2, 3), +// "abc", +// g.SliceOf("def", "ghi"), +// g.SliceOf(4.5, 6.7), +// ) +// +// nestedDeque.Iter().Flatten().Collect().Print() +// +// Output: Deque[1, 2, 3, abc, def, ghi, 4.5, 6.7] +// +// The resulting iterator will contain elements from each iterator in sequence. +func (seq SeqDeque[V]) Flatten() SeqDeque[V] { + return func(yield func(V) bool) { + var flatten func(item any) bool + flatten = func(item any) bool { + rv := reflect.ValueOf(item) + switch rv.Kind() { + case reflect.Slice, reflect.Array: + for i := range rv.Len() { + if !flatten(rv.Index(i).Interface()) { + return false + } + } + default: + if v, ok := item.(V); ok { + if !yield(v) { + return false + } + } + } + return true + } + + seq(func(item V) bool { + return flatten(item) + }) + } +} + +// Inspect creates a new iterator that wraps around the current iterator +// and allows inspecting each element as it passes through. +func (seq SeqDeque[V]) Inspect(fn func(v V)) SeqDeque[V] { + return SeqDeque[V](iter.Inspect(iter.Seq[V](seq), fn)) +} + +// Intersperse inserts the provided separator between elements of the iterator. +// +// The function creates a new iterator that inserts the given separator between each +// consecutive pair of elements in the original iterator. +// +// Params: +// +// - sep (V): The separator to intersperse between elements. +// +// Returns: +// +// - SeqDeque[V]: An iterator containing elements with the separator interspersed. +// +// Example usage: +// +// g.DequeOf("Hello", "World", "!"). +// Iter(). +// Intersperse(" "). +// Collect(). +// Print() +// +// Output: "Hello World !". +// +// The resulting iterator will contain elements with the separator interspersed. +func (seq SeqDeque[V]) Intersperse(sep V) SeqDeque[V] { + return SeqDeque[V](iter.Intersperse(iter.Seq[V](seq), sep)) +} + +// Map transforms each element in the iterator using the given function. +// +// The function creates a new iterator by applying the provided function to each element +// of the original iterator. +// +// Params: +// +// - fn (func(V) V): The function used to transform elements. +// +// Returns: +// +// - SeqDeque[V]: A iterator containing elements transformed by the provided function. +// +// Example usage: +// +// deque := g.DequeOf(1, 2, 3) +// doubled := deque. +// Iter(). +// Map( +// func(val int) int { +// return val * 2 +// }). +// Collect() +// doubled.Print() +// +// Output: Deque[2, 4, 6]. +// +// The resulting iterator will contain elements transformed by the provided function. +func (seq SeqDeque[V]) Map(transform func(V) V) SeqDeque[V] { + return SeqDeque[V](iter.Map(iter.Seq[V](seq), transform)) +} + +// Partition divides the elements of the iterator into two separate deques based on a given predicate function. +// +// The function takes a predicate function 'fn', which should return true or false for each element in the iterator. +// Elements for which 'fn' returns true are collected into the left deque, while those for which 'fn' returns false +// are collected into the right deque. +// +// Params: +// +// - fn (func(V) bool): The predicate function used to determine the placement of elements. +// +// Returns: +// +// - (Deque[V], Deque[V]): Two deques representing elements that satisfy and don't satisfy the predicate, respectively. +// +// Example usage: +// +// evens, odds := g.DequeOf(1, 2, 3, 4, 5). +// Iter(). +// Partition( +// func(v int) bool { +// return v%2 == 0 +// }) +// +// fmt.Println("Even numbers:", evens) // Output: Even numbers: Deque[2, 4] +// fmt.Println("Odd numbers:", odds) // Output: Odd numbers: Deque[1, 3, 5] +// +// The resulting two deques will contain elements separated based on whether they satisfy the predicate or not. +func (seq SeqDeque[V]) Partition(fn func(v V) bool) (*Deque[V], *Deque[V]) { + left := NewDeque[V]() + right := NewDeque[V]() + + seq(func(v V) bool { + if fn(v) { + left.PushBack(v) + } else { + right.PushBack(v) + } + return true + }) + + return left, right +} + +// Permutations generates iterators of all permutations of elements. +// +// The function uses a recursive approach to generate all the permutations of the elements. +// If the iterator is empty or contains a single element, it returns the iterator itself +// wrapped in a single-element iterator. +// +// Returns: +// +// - SeqSlices[V]: An iterator of iterators containing all possible permutations of the +// elements in the iterator. +// +// Example usage: +// +// deque := g.DequeOf(1, 2, 3) +// perms := deque.Iter().Permutations().Collect() +// for _, perm := range perms { +// fmt.Println(perm) +// } +// +// Output: +// Slice[1, 2, 3] +// Slice[2, 1, 3] +// Slice[3, 1, 2] +// Slice[1, 3, 2] +// Slice[2, 3, 1] +// Slice[3, 2, 1] +// +// The resulting iterator will contain iterators representing all possible permutations +// of the elements in the original iterator. +func (seq SeqDeque[V]) Permutations() SeqSlices[V] { + return SeqSlices[V](iter.Permutations(iter.Seq[V](seq))) +} + +// Range iterates through elements until the given function returns false. +// +// The function iterates through the elements of the iterator and applies the provided function +// to each element. It stops iteration when the function returns false for an element. +// +// Params: +// +// - fn (func(V) bool): The function that evaluates elements for continuation of iteration. +// +// Example usage: +// +// iter := g.DequeOf(1, 2, 3, 4, 5).Iter() +// iter.Range(func(val int) bool { +// fmt.Println(val) // Replace this with the function logic you need. +// return val < 5 // Replace this with the condition for continuing iteration. +// }) +// +// The iteration will stop when the provided function returns false for an element. +func (seq SeqDeque[V]) Range(fn func(v V) bool) { iter.Range(iter.Seq[V](seq), fn) } + +// Skip returns a new iterator skipping the first n elements. +// +// The function creates a new iterator that skips the first n elements of the current iterator +// and returns an iterator starting from the (n+1)th element. +// +// Params: +// +// - n (uint): The number of elements to skip from the beginning of the iterator. +// +// Returns: +// +// - SeqDeque[V]: An iterator that starts after skipping the first n elements. +// +// Example usage: +// +// iter := g.DequeOf(1, 2, 3, 4, 5, 6).Iter() +// iter.Skip(3).Collect().Print() +// +// Output: Deque[4, 5, 6] +// +// The resulting iterator will start after skipping the specified number of elements. +func (seq SeqDeque[V]) Skip(n uint) SeqDeque[V] { + return SeqDeque[V](iter.Skip(iter.Seq[V](seq), int(n))) +} + +// StepBy creates a new iterator that iterates over every N-th element of the original iterator. +// This function is useful when you want to skip a specific number of elements between each iteration. +// +// Parameters: +// - n uint: The step size, indicating how many elements to skip between each iteration. +// +// Returns: +// - SeqDeque[V]: A new iterator that produces elements from the original iterator with a step size of N. +// +// Example usage: +// +// deque := g.DequeOf(1, 2, 3, 4, 5, 6, 7, 8, 9, 10) +// iter := deque.Iter().StepBy(3) +// result := iter.Collect() +// result.Print() +// +// Output: Deque[1, 4, 7, 10] +// +// The resulting iterator will produce elements from the original iterator with a step size of N. +func (seq SeqDeque[V]) StepBy(n uint) SeqDeque[V] { + return SeqDeque[V](iter.StepBy(iter.Seq[V](seq), int(n))) +} + +// SortBy applies a custom sorting function to the elements in the iterator +// and returns a new iterator containing the sorted elements. +// +// The sorting function 'fn' should take two arguments, 'a' and 'b' of type V, +// and return true if 'a' should be ordered before 'b', and false otherwise. +// +// Example: +// +// g.DequeOf("a", "c", "b"). +// Iter(). +// SortBy(func(a, b string) cmp.Ordering { return b.Cmp(a) }). +// Collect(). +// Print() +// +// Output: Deque[c, b, a] +// +// The returned iterator is of type SeqDeque[V], which implements the iterator +// interface for further iteration over the sorted elements. +func (seq SeqDeque[V]) SortBy(fn func(a, b V) cmp.Ordering) SeqDeque[V] { + return SeqDeque[V](iter.SortBy(iter.Seq[V](seq), func(a, b V) bool { return fn(a, b) == cmp.Less })) +} + +// Take returns a new iterator with the first n elements. +// The function creates a new iterator containing the first n elements from the original iterator. +func (seq SeqDeque[V]) Take(n uint) SeqDeque[V] { + return SeqDeque[V](iter.Take(iter.Seq[V](seq), int(n))) +} + +// First returns the first element from the sequence. +func (seq SeqDeque[V]) First() Option[V] { + return OptionOf(iter.First(iter.Seq[V](seq))) +} + +// Last returns the last element from the sequence. +func (seq SeqDeque[V]) Last() Option[V] { + return OptionOf(iter.Last(iter.Seq[V](seq))) +} + +// Nth returns the nth element (0-indexed) in the sequence. +func (seq SeqDeque[V]) Nth(n Int) Option[V] { + return OptionOf(iter.Nth(iter.Seq[V](seq), int(n))) +} + +// ToChan converts the iterator into a channel, optionally with context(s). +// +// The function converts the elements of the iterator into a channel for streaming purposes. +// Optionally, it accepts context(s) to handle cancellation or timeout scenarios. +// +// Params: +// +// - ctxs (context.Context): Optional context(s) to control the channel behavior (e.g., cancellation). +// +// Returns: +// +// - chan V: A channel containing the elements from the iterator. +// +// Example usage: +// +// iter := g.DequeOf(1, 2, 3).Iter() +// ctx, cancel := context.WithCancel(context.Background()) +// defer cancel() // Ensure cancellation to avoid goroutine leaks. +// ch := iter.ToChan(ctx) +// for val := range ch { +// fmt.Println(val) +// } +// +// The resulting channel allows streaming elements from the iterator with optional context handling. +func (seq SeqDeque[V]) ToChan(ctxs ...context.Context) chan V { + ctx := context.Background() + if len(ctxs) > 0 { + ctx = ctxs[0] + } + + return iter.ToChan(iter.Seq[V](seq), ctx) +} + +// Unique returns an iterator with only unique elements. +// +// The function returns an iterator containing only the unique elements from the original iterator. +// +// Returns: +// +// - SeqDeque[V]: An iterator containing unique elements from the original iterator. +// +// Example usage: +// +// deque := g.DequeOf(1, 2, 3, 2, 4, 5, 3) +// unique := deque.Iter().Unique().Collect() +// unique.Print() +// +// Output: Deque[1, 2, 3, 4, 5]. +// +// The resulting iterator will contain only unique elements from the original iterator. +func (seq SeqDeque[V]) Unique() SeqDeque[V] { + return SeqDeque[V](iter.Unique(iter.Seq[V](seq))) +} + +// Zip combines elements from the current sequence and another sequence into pairs, +// creating an ordered map with identical keys and values of type V. +func (seq SeqDeque[V]) Zip(two SeqDeque[V]) SeqMapOrd[any, any] { + return func(yield func(any, any) bool) { + zipSeq := iter.Zip(iter.Seq[V](seq), iter.Seq[V](two)) + zipSeq(func(a, b V) bool { + return yield(a, b) + }) + } +} + +// Find searches for an element in the iterator that satisfies the provided function. +// +// The function iterates through the elements of the iterator and returns the first element +// for which the provided function returns true. +// +// Params: +// +// - fn (func(V) bool): The function used to test elements for a condition. +// +// Returns: +// +// - Option[V]: An Option containing the first element that satisfies the condition; None if not found. +// +// Example usage: +// +// iter := g.DequeOf(1, 2, 3, 4, 5).Iter() +// +// found := iter.Find( +// func(i int) bool { +// return i == 2 +// }) +// +// if found.IsSome() { +// fmt.Println("Found:", found.Some()) +// } else { +// fmt.Println("Not found.") +// } +// +// The resulting Option may contain the first element that satisfies the condition, or None if not found. +func (seq SeqDeque[V]) Find(fn func(v V) bool) Option[V] { + return OptionOf(iter.Find(iter.Seq[V](seq), fn)) +} + +// Windows returns an iterator that yields sliding windows of elements of the specified size. +// +// The function creates a new iterator that yields windows of elements from the original iterator, +// where each window is a slice containing elements of the specified size and moves one element at a time. +// +// Params: +// +// - n (int): The size of each window. +// +// Returns: +// +// - SeqSlices[V]: An iterator yielding sliding windows of elements of the specified size. +// +// Example usage: +// +// deque := g.DequeOf(1, 2, 3, 4, 5, 6) +// windows := deque.Iter().Windows(3).Collect() +// +// Output: [Slice[1, 2, 3] Slice[2, 3, 4] Slice[3, 4, 5] Slice[4, 5, 6]] +// +// The resulting iterator will yield sliding windows of elements, each containing the specified number of elements. +func (seq SeqDeque[V]) Windows(n Int) SeqSlices[V] { + return SeqSlices[V](iter.Windows(iter.Seq[V](seq), int(n))) +} + +// Context allows the iteration to be controlled with a context.Context. +func (seq SeqDeque[V]) Context(ctx context.Context) SeqDeque[V] { + return SeqDeque[V](iter.Context(iter.Seq[V](seq), ctx)) +} + +// MaxBy returns the maximum element in the sequence using the provided comparison function. +func (seq SeqDeque[V]) MaxBy(fn func(V, V) cmp.Ordering) Option[V] { + return OptionOf(iter.MaxBy(iter.Seq[V](seq), func(a, b V) bool { return fn(a, b) == cmp.Less })) +} + +// MinBy returns the minimum element in the sequence using the provided comparison function. +func (seq SeqDeque[V]) MinBy(fn func(V, V) cmp.Ordering) Option[V] { + return OptionOf(iter.MinBy(iter.Seq[V](seq), func(a, b V) bool { return fn(a, b) == cmp.Less })) +} + +// FlatMap applies a function to each element and flattens the results into a single sequence. +// +// The function transforms each element into a new SeqDeque and then flattens all resulting +// sequences into a single sequence. +// +// Params: +// +// - fn (func(V) SeqDeque[V]): The function that transforms each element into a SeqDeque. +// +// Returns: +// +// - SeqDeque[V]: A flattened sequence containing all elements from the transformed sequences. +// +// Example usage: +// +// deque := g.DequeOf(1, 2, 3) +// result := deque.Iter().FlatMap(func(n int) g.SeqDeque[int] { +// return g.DequeOf(n, n*10).Iter() +// }).Collect() +// result.Print() // Deque[1, 10, 2, 20, 3, 30] +func (seq SeqDeque[V]) FlatMap(fn func(V) SeqDeque[V]) SeqDeque[V] { + mapped := iter.MapTo(iter.Seq[V](seq), func(v V) iter.Seq[V] { + return iter.Seq[V](fn(v)) + }) + return SeqDeque[V](iter.FlattenSeq(mapped)) +} + +// FilterMap applies a function to each element and filters out None results. +// +// The function transforms and filters elements in a single pass. Elements where the function +// returns None are filtered out, and elements where it returns Some are unwrapped +// and included in the result. +// +// Params: +// +// - fn (func(V) Option[V]): The function that transforms and filters elements. +// Returns Some(value) to include the transformed element, or None to filter it out. +// +// Returns: +// +// - SeqDeque[V]: A sequence containing only the successfully transformed elements. +// +// Example usage: +// +// deque := g.DequeOf(1, 2, 3, 4, 5) +// result := deque.Iter().FilterMap(func(n int) g.Option[int] { +// if n%2 == 0 { +// return g.Some(n * 10) +// } +// return g.None[int]() +// }).Collect() +// result.Print() // Deque[20, 40] +func (seq SeqDeque[V]) FilterMap(fn func(V) Option[V]) SeqDeque[V] { + return SeqDeque[V](iter.FilterMap(iter.Seq[V](seq), func(v V) (V, bool) { + return fn(v).Option() + })) +} + +// Scan applies a function to each element and produces a sequence of successive accumulated results. +// +// The function takes an initial value and applies the provided function to each element along +// with the accumulated value, producing a new sequence where each element is the result of +// the accumulation. The initial value is included as the first element. +// +// Params: +// +// - init (V): The initial value for the accumulation. +// - fn (func(acc, val V) V): The function that combines the accumulator with each element. +// +// Returns: +// +// - SeqDeque[V]: A sequence containing the initial value and all accumulated results. +// +// Example usage: +// +// deque := g.DequeOf(1, 2, 3, 4, 5) +// result := deque.Iter().Scan(0, func(acc, val int) int { +// return acc + val +// }).Collect() +// result.Print() // Deque[0, 1, 3, 6, 10, 15] +func (seq SeqDeque[V]) Scan(init V, fn func(acc, val V) V) SeqDeque[V] { + return func(yield func(V) bool) { + if !yield(init) { + return + } + iter.Scan(iter.Seq[V](seq), init, fn)(yield) + } +} + +// Next extracts the next element from the iterator and advances it. +// +// This method consumes the next element from the iterator and returns it wrapped in an Option. +// The iterator itself is modified to point to the remaining elements. +// +// Returns: +// - Option[V]: Some(value) if an element exists, None if the iterator is exhausted. +func (seq *SeqDeque[V]) Next() Option[V] { + if value, remaining, ok := iter.Next(iter.Seq[V](*seq)); ok { + *seq = SeqDeque[V](remaining) + return Some(value) + } + + return None[V]() +} diff --git a/backend/vendor/github.com/enetx/g/deque_iter_par.go b/backend/vendor/github.com/enetx/g/deque_iter_par.go new file mode 100644 index 0000000..ab7709d --- /dev/null +++ b/backend/vendor/github.com/enetx/g/deque_iter_par.go @@ -0,0 +1,624 @@ +package g + +import ( + "sync" + "sync/atomic" + + "github.com/enetx/g/cmp" +) + +// All returns true only if fn returns true for every element. +// It stops early on the first false. +func (p SeqDequePar[V]) All(fn func(V) bool) bool { + var ok atomic.Bool + ok.Store(true) + + p.Range(func(v V) bool { + if !fn(v) { + ok.Store(false) + return false + } + return true + }) + + return ok.Load() +} + +// Any returns true if fn returns true for any element. +// It stops early on the first true. +func (p SeqDequePar[V]) Any(fn func(V) bool) bool { + var ok atomic.Bool + + p.Range(func(v V) bool { + if fn(v) { + ok.Store(true) + return false + } + return true + }) + + return ok.Load() +} + +// Chain concatenates this SeqDequePar with others, preserving full parallelism. +// Each sequence runs with its own worker pool in parallel. +func (p SeqDequePar[V]) Chain(others ...SeqDequePar[V]) SeqDequePar[V] { + return SeqDequePar[V]{ + seq: func(yield func(V) bool) { + done := make(chan struct{}) + result := make(chan V, int(p.workers)*4) + + var ( + wg sync.WaitGroup + once sync.Once + ) + + runSequence := func(seq SeqDequePar[V]) { + defer wg.Done() + seq.Range(func(v V) bool { + select { + case <-done: + return false + case result <- v: + return true + } + }) + } + + go func() { + defer close(result) + + wg.Add(1) + go runSequence(p) + + for _, o := range others { + wg.Add(1) + go runSequence(o) + } + + wg.Wait() + }() + + for { + select { + case <-done: + return + case v, ok := <-result: + if !ok { + return + } + if !yield(v) { + once.Do(func() { close(done) }) + return + } + } + } + }, + workers: p.workers, + process: func(v V) (V, bool) { return v, true }, + } +} + +// Collect gathers all processed elements into a Deque. +func (p SeqDequePar[V]) Collect() *Deque[V] { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- v + return true + }) + }() + + result := NewDeque[V](0) + for v := range ch { + result.PushBack(v) + } + + return result +} + +// Count returns the total number of elements processed. +func (p SeqDequePar[V]) Count() Int { + var count atomic.Int64 + p.Range(func(V) bool { + count.Add(1) + return true + }) + + return Int(count.Load()) +} + +// Exclude removes elements for which fn returns true, in parallel. +func (p SeqDequePar[V]) Exclude(fn func(V) bool) SeqDequePar[V] { + return p.Filter(func(v V) bool { return !fn(v) }) +} + +// Filter retains only elements where fn returns true. +func (p SeqDequePar[V]) Filter(fn func(V) bool) SeqDequePar[V] { + prev := p.process + + return SeqDequePar[V]{ + seq: p.seq, + workers: p.workers, + process: func(v V) (V, bool) { + if mid, ok := prev(v); ok && fn(mid) { + return mid, true + } + var zero V + return zero, false + }, + } +} + +// Find returns the first element satisfying fn, or None if no such element exists. +func (p SeqDequePar[V]) Find(fn func(V) bool) Option[V] { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + if fn(v) { + ch <- v + return false + } + return true + }) + }() + + if v, ok := <-ch; ok { + return Some(v) + } + + return None[V]() +} + +// Fold reduces all elements into a single value, using fn to accumulate results. +func (p SeqDequePar[V]) Fold(init V, fn func(acc, v V) V) V { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- v + return true + }) + }() + + acc := init + for v := range ch { + acc = fn(acc, v) + } + + return acc +} + +// Flatten unpacks nested slices or arrays in the source, returning a flat parallel sequence. +func (p SeqDequePar[V]) Flatten() SeqDequePar[V] { + seq := func(yield func(V) bool) { + resultsChan := make(chan V, 100) + doneChan := make(chan struct{}) + var once sync.Once + + go func() { + defer close(resultsChan) + + p.Range(func(v V) bool { + select { + case <-doneChan: + return false + default: + } + + flattenedItems := flattenToSlice(v) + for _, item := range flattenedItems { + if flatItem, ok := item.(V); ok { + select { + case resultsChan <- flatItem: + case <-doneChan: + return false + } + } + } + return true + }) + }() + + for { + select { + case v, ok := <-resultsChan: + if !ok { + return + } + if !yield(v) { + once.Do(func() { close(doneChan) }) + return + } + case <-doneChan: + return + } + } + } + + return SeqDequePar[V]{ + seq: seq, + workers: p.workers, + process: func(v V) (V, bool) { return v, true }, + } +} + +// FlatMap applies fn to each element in parallel, flattening the resulting sequences. +func (p SeqDequePar[V]) FlatMap(fn func(V) SeqDeque[V]) SeqDequePar[V] { + return SeqDequePar[V]{ + seq: func(yield func(V) bool) { + done := make(chan struct{}) + result := make(chan V, 100) + + var ( + wg sync.WaitGroup + once sync.Once + ) + + go func() { + defer close(result) + + p.Range(func(v V) bool { + select { + case <-done: + return false + default: + } + + wg.Add(1) + go func(val V) { + defer wg.Done() + fn(val)(func(item V) bool { + select { + case <-done: + return false + case result <- item: + return true + } + }) + }(v) + + return true + }) + + wg.Wait() + }() + + for { + select { + case <-done: + return + case v, ok := <-result: + if !ok { + return + } + if !yield(v) { + once.Do(func() { close(done) }) + return + } + } + } + }, + workers: p.workers, + process: func(v V) (V, bool) { return v, true }, + } +} + +// FilterMap applies fn to each element in parallel, keeping only Some values. +func (p SeqDequePar[V]) FilterMap(fn func(V) Option[V]) SeqDequePar[V] { + prev := p.process + + return SeqDequePar[V]{ + seq: p.seq, + workers: p.workers, + process: func(v V) (V, bool) { + if mid, ok := prev(v); ok { + if opt := fn(mid); opt.IsSome() { + return opt.Some(), true + } + } + var zero V + return zero, false + }, + } +} + +// StepBy yields every nth element. +func (p SeqDequePar[V]) StepBy(n uint) SeqDequePar[V] { + if n == 0 { + n = 1 + } + + prev := p.process + counter := &atomic.Uint64{} + + return SeqDequePar[V]{ + seq: p.seq, + workers: p.workers, + process: func(v V) (V, bool) { + if mid, ok := prev(v); ok { + count := counter.Add(1) + if (count-1)%uint64(n) == 0 { + return mid, true + } + } + var zero V + return zero, false + }, + } +} + +// MaxBy returns the maximum element according to the comparison function. +func (p SeqDequePar[V]) MaxBy(fn func(V, V) cmp.Ordering) Option[V] { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- v + return true + }) + }() + + var max V + hasMax := false + + for v := range ch { + if !hasMax { + max = v + hasMax = true + } else if fn(v, max).IsGt() { + max = v + } + } + + if hasMax { + return Some(max) + } + return None[V]() +} + +// MinBy returns the minimum element according to the comparison function. +func (p SeqDequePar[V]) MinBy(fn func(V, V) cmp.Ordering) Option[V] { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- v + return true + }) + }() + + var min V + hasMin := false + + for v := range ch { + if !hasMin { + min = v + hasMin = true + } else if fn(v, min).IsLt() { + min = v + } + } + + if hasMin { + return Some(min) + } + return None[V]() +} + +// Reduce aggregates elements of the parallel sequence using the provided function. +// The first received element is used as the initial accumulator. +// If the sequence is empty, returns None[V]. +func (p SeqDequePar[V]) Reduce(fn func(a, b V) V) Option[V] { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- v + return true + }) + }() + + var ( + acc V + first = true + ) + + for v := range ch { + if first { + acc = v + first = false + continue + } + + acc = fn(acc, v) + } + + if first { + return None[V]() + } + + return Some(acc) +} + +// ForEach applies fn to each element without early exit. +func (p SeqDequePar[V]) ForEach(fn func(V)) { + p.Range(func(v V) bool { + fn(v) + return true + }) +} + +// Inspect invokes fn on each element without altering the resulting sequence. +func (p SeqDequePar[V]) Inspect(fn func(V)) SeqDequePar[V] { + prev := p.process + + return SeqDequePar[V]{ + seq: p.seq, + workers: p.workers, + process: func(x V) (V, bool) { + if mid, ok := prev(x); ok { + fn(mid) + return mid, true + } + var zero V + return zero, false + }, + } +} + +// Map applies fn to each element. +func (p SeqDequePar[V]) Map(fn func(V) V) SeqDequePar[V] { + prev := p.process + + return SeqDequePar[V]{ + seq: p.seq, + workers: p.workers, + process: func(v V) (V, bool) { + if mid, ok := prev(v); ok { + return fn(mid), true + } + var zero V + return zero, false + }, + } +} + +func (p SeqDequePar[V]) Partition(fn func(V) bool) (*Deque[V], *Deque[V]) { + type item struct { + value V + isLeft bool + } + + ch := make(chan item) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- item{ + value: v, + isLeft: fn(v), + } + return true + }) + }() + + left, right := NewDeque[V](0), NewDeque[V](0) + for it := range ch { + if it.isLeft { + left.PushBack(it.value) + } else { + right.PushBack(it.value) + } + } + + return left, right +} + +// Range applies fn to each processed element in parallel, stopping on false. +func (p SeqDequePar[V]) Range(fn func(V) bool) { + in := make(chan V) + done := make(chan struct{}) + + var ( + wg sync.WaitGroup + once sync.Once + ) + + go func() { + defer close(in) + p.seq(func(v V) bool { + select { + case <-done: + return false + case in <- v: + return true + } + }) + }() + + wg.Add(int(p.workers)) + for range p.workers { + go func() { + defer wg.Done() + for v := range in { + if mid, ok := p.process(v); ok { + if !fn(mid) { + once.Do(func() { close(done) }) + return + } + } + } + }() + } + + wg.Wait() +} + +func (p SeqDequePar[V]) Skip(n uint) SeqDequePar[V] { + prev := p.process + + return SeqDequePar[V]{ + seq: func(yield func(V) bool) { + var cnt uint64 + p.seq(func(v V) bool { + if atomic.AddUint64(&cnt, 1) > uint64(n) { + return yield(v) + } + return true + }) + }, + workers: p.workers, + process: prev, + } +} + +func (p SeqDequePar[V]) Take(n uint) SeqDequePar[V] { + prev := p.process + + return SeqDequePar[V]{ + seq: func(yield func(V) bool) { + var cnt uint64 + p.seq(func(v V) bool { + if atomic.AddUint64(&cnt, 1) <= uint64(n) { + return yield(v) + } + return false + }) + }, + workers: p.workers, + process: prev, + } +} + +// Unique removes duplicate elements, preserving the first occurrence. +func (p SeqDequePar[V]) Unique() SeqDequePar[V] { + prev := p.process + seen := NewMapSafe[any, struct{}]() + + return SeqDequePar[V]{ + seq: p.seq, + workers: p.workers, + process: func(v V) (V, bool) { + if mid, ok := prev(v); ok { + if loaded := seen.Entry(mid).OrSet(struct{}{}); loaded.IsSome() { + var zero V + return zero, false + } + + return mid, true + } + + var zero V + return zero, false + }, + } +} diff --git a/backend/vendor/github.com/enetx/g/dir.go b/backend/vendor/github.com/enetx/g/dir.go new file mode 100644 index 0000000..ba56c1c --- /dev/null +++ b/backend/vendor/github.com/enetx/g/dir.go @@ -0,0 +1,514 @@ +package g + +import ( + "fmt" + "io/fs" + "os" + "path/filepath" +) + +// NewDir returns a new Dir instance with the given path. +func NewDir(path String) *Dir { return &Dir{path: path} } + +// Chown changes the ownership of the directory to the specified UID and GID. +// It uses os.Chown to modify ownership and returns a Result[*Dir] indicating success or failure. +func (d *Dir) Chown(uid, gid int) Result[*Dir] { + err := os.Chown(d.path.Std(), uid, gid) + if err != nil { + return Err[*Dir](err) + } + + return Ok(d) +} + +// Stat retrieves information about the directory represented by the Dir instance. +// It returns a Result[fs.FileInfo] containing details about the directory's metadata. +func (d *Dir) Stat() Result[fs.FileInfo] { + if d.Path().IsErr() { + return Err[fs.FileInfo](d.Path().err) + } + + return ResultOf(os.Stat(d.Path().v.Std())) +} + +// Lstat retrieves information about the symbolic link represented by the Dir instance. +// It returns a Result[fs.FileInfo] containing details about the symbolic link's metadata. +// Unlike Stat, Lstat does not follow the link and provides information about the link itself. +func (d *Dir) Lstat() Result[fs.FileInfo] { return ResultOf(os.Lstat(d.Path().v.Std())) } + +// IsLink checks if the directory is a symbolic link. +func (d *Dir) IsLink() bool { + stat := d.Lstat() + return stat.IsOk() && stat.v.Mode()&os.ModeSymlink != 0 +} + +// CreateTemp creates a new temporary directory in the specified directory with the +// specified name pattern and returns a Result, which contains a pointer to the Dir +// or an error if the operation fails. +// If no directory is specified, the default directory for temporary directories is used. +// If no name pattern is specified, the default pattern "*" is used. +// +// Parameters: +// +// - args ...String: A variadic parameter specifying the directory and/or name +// pattern for the temporary directory. +// +// Returns: +// +// - *Dir: A pointer to the Dir representing the temporary directory. +// +// Example usage: +// +// d := g.NewDir("") +// tmpdir := d.CreateTemp() // Creates a temporary directory with default settings +// tmpdirWithDir := d.CreateTemp("mydir") // Creates a temporary directory in "mydir" directory +// tmpdirWithPattern := d.CreateTemp("", "tmp") // Creates a temporary directory with "tmp" pattern +func (*Dir) CreateTemp(args ...String) Result[*Dir] { + dir := "" + pattern := "*" + + if len(args) != 0 { + if len(args) > 1 { + pattern = args[1].Std() + } + + dir = args[0].Std() + } + + tmpDir, err := os.MkdirTemp(dir, pattern) + if err != nil { + return Err[*Dir](err) + } + + return Ok(NewDir(String(tmpDir))) +} + +// Temp returns the default directory to use for temporary files. +// +// On Unix systems, it returns $TMPDIR if non-empty, else /tmp. +// On Windows, it uses GetTempPath, returning the first non-empty +// value from %TMP%, %TEMP%, %USERPROFILE%, or the Windows directory. +// On Plan 9, it returns /tmp. +// +// The directory is neither guaranteed to exist nor have accessible +// permissions. +func (*Dir) Temp() *Dir { return NewDir(String(os.TempDir())) } + +// Remove attempts to delete the directory and its contents. +// It returns a Result, which contains either the *Dir or an error. +// If the directory does not exist, Remove returns a successful Result with *Dir set. +// Any error that occurs during removal will be of type *PathError. +func (d *Dir) Remove() Result[*Dir] { + if err := os.RemoveAll(d.String().Std()); err != nil { + return Err[*Dir](err) + } + + return Ok(d) +} + +// Copy copies the contents of the current directory to the destination directory. +// +// Parameters: +// +// - dest (String): The destination directory where the contents of the current directory should be copied. +// +// - followLinks (optional): A boolean indicating whether to follow symbolic links during the walk. +// If true, symbolic links are followed; otherwise, they are skipped. +// +// Returns: +// +// - Result[*Dir]: A Result type containing either a pointer to a new Dir instance representing the destination directory or an error. +// +// Example usage: +// +// sourceDir := g.NewDir("path/to/source") +// destinationDirResult := sourceDir.Copy("path/to/destination") +// if destinationDirResult.IsErr() { +// // Handle error +// } +// destinationDir := destinationDirResult.Ok() +func (d *Dir) Copy(dest String, followLinks ...bool) Result[*Dir] { + files := NewSlice[*File]() + + for r := range d.Walk() { + if r.IsErr() { + return Err[*Dir](r.err) + } + files.Push(r.v) + } + + root := d.Path() + if root.IsErr() { + return Err[*Dir](root.err) + } + + follow := Slice[bool](followLinks).Get(0).UnwrapOr(true) + + for f := range files.Iter() { + path := f.Path() + if path.IsErr() { + return Err[*Dir](path.err) + } + + relpath, err := filepath.Rel(root.v.Std(), path.v.Std()) + if err != nil { + return Err[*Dir](err) + } + + destpath := NewDir(dest).Join(String(relpath)) + if destpath.IsErr() { + return Err[*Dir](destpath.err) + } + + stat := f.Stat() + if stat.IsErr() { + return Err[*Dir](stat.err) + } + + if stat.v.IsDir() { + if !follow && f.IsLink() { + continue + } + + if r := NewDir(destpath.v).CreateAll(stat.v.Mode()); r.IsErr() { + return r + } + + continue + } + + if r := f.Copy(destpath.v, stat.v.Mode()); r.IsErr() { + return Err[*Dir](r.err) + } + } + + return Ok(NewDir(dest)) +} + +// Create creates a new directory with the specified mode (optional). +// +// Parameters: +// +// - mode (os.FileMode, optional): The file mode for the new directory. +// If not provided, it defaults to DirDefault (0755). +// +// Returns: +// +// - *Dir: A pointer to the Dir instance on which the method was called. +// +// Example usage: +// +// dir := g.NewDir("path/to/directory") +// createdDir := dir.Create(0755) // Optional mode argument +func (d *Dir) Create(mode ...os.FileMode) Result[*Dir] { + dmode := Slice[os.FileMode](mode).Get(0).UnwrapOr(DirDefault) + if err := os.Mkdir(d.path.Std(), dmode); err != nil { + return Err[*Dir](err) + } + + return Ok(d) +} + +// Join joins the current directory path with the given path elements, returning the joined path. +// +// Parameters: +// +// - elem (...String): One or more String values representing path elements to +// be joined with the current directory path. +// +// Returns: +// +// - String: The resulting joined path as an String. +// +// Example usage: +// +// dir := g.NewDir("path/to/directory") +// joinedPath := dir.Join("subdir", "file.txt") +func (d *Dir) Join(elem ...String) Result[String] { + path := d.Path() + if path.IsErr() { + return Err[String](path.err) + } + + se := SliceOf(elem...) + se.Insert(0, path.v) + + return Ok(String(filepath.Join(se.ToStringSlice()...))) +} + +// SetPath sets the path of the current directory. +// +// Parameters: +// +// - path (String): The new path to be set for the current directory. +// +// Returns: +// +// - *Dir: A pointer to the updated Dir instance with the new path. +// +// Example usage: +// +// dir := g.NewDir("path/to/directory") +// dir.SetPath("new/path/to/directory") +func (d *Dir) SetPath(path String) *Dir { + d.path = path + return d +} + +// CreateAll creates all directories along the given path, with the specified mode (optional). +// +// Parameters: +// +// - mode ...os.FileMode (optional): The file mode to be used when creating the directories. +// If not provided, it defaults to the value of DirDefault constant (0755). +// +// Returns: +// +// - *Dir: A pointer to the Dir instance representing the created directories. +// +// Example usage: +// +// dir := g.NewDir("path/to/directory") +// dir.CreateAll() +// dir.CreateAll(0755) +func (d *Dir) CreateAll(mode ...os.FileMode) Result[*Dir] { + if d.Exist() { + return Ok(d) + } + + path := d.Path() + if path.IsErr() { + return Err[*Dir](path.err) + } + + dmode := Slice[os.FileMode](mode).Get(0).UnwrapOr(DirDefault) + + err := os.MkdirAll(path.v.Std(), dmode) + if err != nil { + return Err[*Dir](err) + } + + return Ok(d) +} + +// Rename renames the current directory to the new path. +// +// Parameters: +// +// - newpath String: The new path for the directory. +// +// Returns: +// +// - *Dir: A pointer to the Dir instance representing the renamed directory. +// If an error occurs, the original Dir instance is returned with the error stored in d.err, +// which can be checked using the Error() method. +// +// Example usage: +// +// dir := g.NewDir("path/to/directory") +// dir.Rename("path/to/new_directory") +func (d *Dir) Rename(newpath String) Result[*Dir] { + ps := String(os.PathSeparator) + + np := newpath.StripSuffix(ps).Split(ps).Collect() + _ = np.Pop() + + if rd := NewDir(np.Join(ps)).CreateAll(); rd.IsErr() { + return rd + } + + if err := os.Rename(d.path.Std(), newpath.Std()); err != nil { + return Err[*Dir](err) + } + + return Ok(NewDir(newpath)) +} + +// Move function simply calls [Dir.Rename] +func (d *Dir) Move(newpath String) Result[*Dir] { return d.Rename(newpath) } + +// Path returns the absolute path of the current directory. +// +// Returns: +// +// - String: The absolute path of the current directory as an String. +// If an error occurs while converting the path to an absolute path, +// the error is stored in d.err, which can be checked using the Error() method. +// +// Example usage: +// +// dir := g.NewDir("path/to/directory") +// absPath := dir.Path() +func (d *Dir) Path() Result[String] { + path, err := filepath.Abs(d.path.Std()) + if err != nil { + return Err[String](err) + } + + return Ok(String(path)) +} + +// Exist checks if the current directory exists. +// +// Returns: +// +// - bool: true if the current directory exists, false otherwise. +// +// Example usage: +// +// dir := g.NewDir("path/to/directory") +// exists := dir.Exist() +func (d *Dir) Exist() bool { + path := d.Path() + if path.IsErr() { + return false + } + + _, err := os.Stat(path.v.Std()) + + return !os.IsNotExist(err) +} + +// Read iterates over the content of the current directory and yields File instances for each entry. +// This method uses a lazy evaluation strategy where each file is processed one at a time as it is needed. +// +// Returns: +// - SeqResult[*File]: A sequence of Result[*File] instances representing each file and directory +// in the current directory. It returns an error if reading the directory fails. +// +// Example usage: +// +// dir := g.NewDir("path/to/directory") +// files := dir.Read() +// for file := range files { +// fmt.Println(file.Ok().Name()) +// } +func (d *Dir) Read() SeqResult[*File] { + return func(yield func(Result[*File]) bool) { + entries, err := os.ReadDir(d.path.Std()) + if err != nil { + yield(Err[*File](err)) + return + } + + dpath := d.Path() + if dpath.IsErr() { + yield(Err[*File](dpath.err)) + return + } + + base := dpath.v + + for _, entry := range entries { + full := NewDir(base).Join(String(entry.Name())) + if full.IsErr() { + yield(Err[*File](full.err)) + return + } + + if !yield(Ok(NewFile(full.v))) { + return + } + } + } +} + +// Glob iterates over files in the current directory matching a specified pattern and yields File instances for each match. +// This method utilizes a lazy evaluation strategy, processing files as they are needed. +// +// Returns: +// - SeqResult[*File]: A sequence of Result[*File] instances representing the files that match the +// provided pattern in the current directory. It returns an error if the glob operation fails. +// +// Example usage: +// +// dir := g.NewDir("path/to/directory/*.txt") +// files := dir.Glob() +// for file := range files { +// fmt.Println(file.Ok().Name()) +// } +func (d *Dir) Glob() SeqResult[*File] { + return (func(yield func(Result[*File]) bool) { + matches, err := filepath.Glob(d.path.Std()) + if err != nil { + yield(Err[*File](err)) + return + } + + for _, match := range matches { + file := NewFile(String(match)).Path() + if file.IsErr() { + yield(Err[*File](file.err)) + return + } + + if !yield(Ok(NewFile(file.v))) { + return + } + } + }) +} + +// Walk returns a lazy sequence of all files and directories under the current Dir. +// You can customize inclusion/exclusion using SeqResult methods (Exclude, Filter, etc.). +// +// Example usage: +// +// NewDir("path/to/dir"). +// Walk(). +// Exclude((*File).IsLink). +// ForEach(func(r Result[*File]) { +// if r.IsOk() { +// fmt.Println(r.Ok().Path().Ok().Std()) +// } +// }) +func (d *Dir) Walk() SeqResult[*File] { + return func(yield func(Result[*File]) bool) { + stack := SliceOf(d) + + for stack.NotEmpty() { + current := stack.Pop() + if current.IsNone() { + break + } + + current.v.Read().Range(func(r Result[*File]) bool { + if r.IsErr() { + return yield(r) + } + + file := r.v + if !yield(Ok(file)) { + return false + } + + stat := file.Stat() + if stat.IsErr() { + return yield(Err[*File](stat.err)) + } + + if stat.v.IsDir() { + path := file.Path() + if path.IsErr() { + return yield(Err[*File](path.err)) + } + + stack.Push(NewDir(path.v)) + } + + return true + }) + } + } +} + +// String returns the String representation of the current directory's path. +func (d *Dir) String() String { return d.path } + +// Print writes the content of the Dir to the standard output (console) +// and returns the Dir unchanged. +func (d *Dir) Print() *Dir { fmt.Print(d); return d } + +// Println writes the content of the Dir to the standard output (console) with a newline +// and returns the Dir unchanged. +func (d *Dir) Println() *Dir { fmt.Println(d); return d } diff --git a/backend/vendor/github.com/enetx/g/errors.go b/backend/vendor/github.com/enetx/g/errors.go new file mode 100644 index 0000000..7928fab --- /dev/null +++ b/backend/vendor/github.com/enetx/g/errors.go @@ -0,0 +1,17 @@ +package g + +import "fmt" + +// ErrFileNotExist represents an error for when a file does not exist. +type ErrFileNotExist struct{ Msg string } + +// Error returns the error message for ErrFileNotExist. +func (e *ErrFileNotExist) Error() string { return fmt.Sprintf("no such file: %s", e.Msg) } + +// ErrFileClosed represents an error for when a file is already closed. +type ErrFileClosed struct{ Msg string } + +// Error returns the error message for ErrFileClosed. +func (e *ErrFileClosed) Error() string { + return fmt.Sprintf("%s: file is already closed and unlocked", e.Msg) +} diff --git a/backend/vendor/github.com/enetx/g/f/f.go b/backend/vendor/github.com/enetx/g/f/f.go new file mode 100644 index 0000000..391ccbb --- /dev/null +++ b/backend/vendor/github.com/enetx/g/f/f.go @@ -0,0 +1,113 @@ +package f + +import ( + "cmp" + "reflect" + "regexp" + "strings" + + "github.com/enetx/g/constraints" +) + +// IsComparable reports whether the value v is comparable. +func IsComparable[T any](t T) bool { return reflect.ValueOf(t).Comparable() } + +// IsZero is a generic function designed to check if a value is considered zero. +func IsZero[T cmp.Ordered](v T) bool { return v == *new(T) } + +// IsEven is a generic function that checks if the provided integer is even. +func IsEven[T constraints.Integer](i T) bool { return i%2 == 0 } + +// IsOdd is a generic function that checks if the provided integer is odd. +func IsOdd[T constraints.Integer](i T) bool { return i%2 != 0 } + +// Match returns a function that checks whether a string or []byte matches a given regular expression. +func Match[T ~string | ~[]byte](t *regexp.Regexp) func(T) bool { + return func(s T) bool { + return t.MatchString(string(s)) + } +} + +// Contains returns a function that checks whether a string or []byte contains a given substring. +func Contains[T ~string | ~[]byte](t T) func(T) bool { + return func(s T) bool { + return strings.Contains(string(s), string(t)) + } +} + +// ContainsAnyChars returns a function that checks whether a string contains any of the characters from a given set. +func ContainsAnyChars[T ~string | ~[]byte](t T) func(T) bool { + return func(s T) bool { + return strings.ContainsAny(string(s), string(t)) + } +} + +// StartsWith returns a function that checks whether a string starts with a given prefix. +func StartsWith[T ~string | ~[]byte](t T) func(T) bool { + return func(s T) bool { + return strings.HasPrefix(string(s), string(t)) + } +} + +// EndsWith returns a function that checks whether a string ends with a given suffix. +func EndsWith[T ~string | ~[]byte](t T) func(T) bool { + return func(s T) bool { + return strings.HasSuffix(string(s), string(t)) + } +} + +// Eq returns a comparison function that evaluates to true when a value is equal to the provided threshold. +func Eq[T comparable](t T) func(T) bool { + return func(s T) bool { + return s == t + } +} + +// Ne returns a comparison function that evaluates to true when a value is not equal to the provided threshold. +func Ne[T comparable](t T) func(T) bool { + return func(s T) bool { + return s != t + } +} + +// Eqd returns a comparison function that evaluates to true when a value is deeply equal to the provided threshold. +func Eqd[T any](t T) func(T) bool { + return func(s T) bool { + return reflect.DeepEqual(t, s) + } +} + +// Ned returns a comparison function that evaluates to true when a value is not deeply equal to the provided threshold. +func Ned[T any](t T) func(T) bool { + return func(s T) bool { + return !reflect.DeepEqual(t, s) + } +} + +// Gt returns a comparison function that evaluates to true when a value is greater than the threshold. +func Gt[T cmp.Ordered](t T) func(T) bool { + return func(s T) bool { + return s > t + } +} + +// Gte returns a comparison function that evaluates to true when a value is greater than or equal to the threshold. +func Gte[T cmp.Ordered](t T) func(T) bool { + return func(s T) bool { + return s >= t + } +} + +// Lt returns a comparison function that evaluates to true when a value is less than the threshold. +func Lt[T cmp.Ordered](t T) func(T) bool { + return func(s T) bool { + return s < t + } +} + +// Lte returns a comparison function that evaluates to true when a value is less than or equal to the threshold. +func Lte[T cmp.Ordered](t T) func(T) bool { + return func(s T) bool { + return s <= t + } +} diff --git a/backend/vendor/github.com/enetx/g/file.go b/backend/vendor/github.com/enetx/g/file.go new file mode 100644 index 0000000..644f35d --- /dev/null +++ b/backend/vendor/github.com/enetx/g/file.go @@ -0,0 +1,743 @@ +package g + +import ( + "bufio" + "errors" + "fmt" + "io" + "io/fs" + "net/http" + "os" + "path/filepath" + + "github.com/enetx/g/internal/filelock" +) + +// NewFile returns a new File instance with the given name. +func NewFile[T ~string](name T) *File { return &File{name: String(name)} } + +// Lines returns a new iterator instance that can be used to read the file +// line by line. +// +// Example usage: +// +// // Open a new file with the specified name "text.txt" +// g.NewFile("text.txt"). +// Lines(). // Read the file line by line +// Skip(3). // Skip the first 3 lines +// Exclude(f.Zero). // Exclude lines that are empty or contain only whitespaces +// Dedup(). // Remove consecutive duplicate lines +// Map(g.String.Upper). // Convert each line to uppercase +// ForEach( // For each line, print it +// func(func(s Result[String]) { +// s.Ok().Print() +// }) +// +// // Output: +// // UPPERCASED_LINE4 +// // UPPERCASED_LINE5 +// // UPPERCASED_LINE6 +func (f *File) Lines() SeqResult[String] { + return func(yield func(Result[String]) bool) { + if f.file == nil { + if r := f.Open(); r.IsErr() { + yield(Err[String](r.err)) + return + } + } + + defer f.Close() + + scanner := bufio.NewScanner(f.file) + scanner.Split(bufio.ScanLines) + + for scanner.Scan() { + if !yield(Ok(String(scanner.Text()))) { + return + } + } + + if err := scanner.Err(); err != nil { + yield(Err[String](err)) + return + } + } +} + +// LinesRaw returns a new iterator instance that reads the file line by line, +// yielding each line as a Bytes slice (raw []byte). +// +// This version avoids intermediate string allocations by working directly with byte slices. +// The returned Bytes are copies of the scanner buffer and are safe to retain. +// +// Returns: +// +// - SeqResult[Bytes]: An iterator over raw byte lines from the file. +// +// Example usage: +// +// g.NewFile("text.txt"). +// LinesRaw(). // Read raw byte lines +// Filter(func(b g.Bytes) bool { +// return len(b) > 0 +// }). +// ForEach(func(line g.Result[g.Bytes]) { +// line.Ok().Print() +// }) +// +// Output: +// LINE_1 +// LINE_2 +// ... +// +// Note: Each line is copied before yielding to avoid scanner buffer reuse issues. +func (f *File) LinesRaw() SeqResult[Bytes] { + return func(yield func(Result[Bytes]) bool) { + if f.file == nil { + if r := f.Open(); r.IsErr() { + yield(Err[Bytes](r.err)) + return + } + } + + defer f.Close() + + scanner := bufio.NewScanner(f.file) + scanner.Split(bufio.ScanLines) + + for scanner.Scan() { + line := make(Bytes, len(scanner.Bytes())) + copy(line, scanner.Bytes()) + if !yield(Ok(line)) { + return + } + } + + if err := scanner.Err(); err != nil { + yield(Err[Bytes](err)) + return + } + } +} + +// Chunks returns a new iterator instance that can be used to read the file +// in fixed-size chunks of the specified size in bytes. +// +// Parameters: +// +// - size (int): The size of each chunk in bytes. +// +// Example usage: +// +// // Open a new file with the specified name "text.txt" +// g.NewFile("text.txt"). +// Chunks(100). // Read the file in chunks of 100 bytes +// Map(g.String.Upper). // Convert each chunk to uppercase +// ForEach( // For each line, print it +// func(func(s Result[String]) { +// s.Ok().Print() +// }) +// +// // Output: +// // UPPERCASED_CHUNK1 +// // UPPERCASED_CHUNK2 +// // UPPERCASED_CHUNK3 +func (f *File) Chunks(size Int) SeqResult[String] { + return func(yield func(Result[String]) bool) { + if size.Lte(0) { + yield(Err[String](errors.New("chunk size must be > 0"))) + return + } + + if f.file == nil { + if r := f.Open(); r.IsErr() { + yield(Err[String](r.err)) + return + } + } + + defer f.Close() + + buffer := make([]byte, size) + + for { + n, err := f.file.Read(buffer) + if err != nil && err != io.EOF { + yield(Err[String](err)) + return + } + + if n == 0 { + break + } + + if !yield(Ok(String(buffer[:n]))) { + return + } + } + } +} + +// ChunksRaw returns a new iterator instance that reads the file in fixed-size +// chunks of bytes, yielding each chunk as a Bytes slice. +// +// This method avoids intermediate string allocations and operates directly on byte slices. +// Each chunk is copied from the underlying buffer to make it safe for downstream use. +// +// Parameters: +// +// - size (Int): The size of each chunk in bytes. Must be > 0. +// +// Returns: +// +// - SeqResult[Bytes]: An iterator over raw byte chunks from the file. +// +// Example usage: +// +// g.NewFile("text.txt"). +// ChunksRaw(128). // Read raw 128-byte chunks +// ForEach(func(chunk g.Result[g.Bytes]) { +// chunk.Ok().Print() +// }) +// +// Output: +// RAW_CHUNK_1 +// RAW_CHUNK_2 +// ... +// +// Note: Each chunk is copied from the buffer to ensure memory safety. +func (f *File) ChunksRaw(size Int) SeqResult[Bytes] { + return func(yield func(Result[Bytes]) bool) { + if size.Lte(0) { + yield(Err[Bytes](errors.New("chunk size must be > 0"))) + return + } + + if f.file == nil { + if r := f.Open(); r.IsErr() { + yield(Err[Bytes](r.err)) + return + } + } + + defer f.Close() + + buf := make([]byte, size) + + for { + n, err := f.file.Read(buf) + if err != nil && err != io.EOF { + yield(Err[Bytes](err)) + return + } + + if n == 0 { + break + } + + chunk := make(Bytes, n) + copy(chunk, buf[:n]) + + if !yield(Ok(chunk)) { + return + } + } + } +} + +// Append appends the given content to the file, with the specified mode (optional). +// If no FileMode is provided, the default FileMode (0644) is used. +// Don't forget to close the file! +func (f *File) Append(content String, mode ...os.FileMode) Result[*File] { + if f.file == nil { + if r := f.createAll(); r.IsErr() { + return r + } + + fmode := Slice[os.FileMode](mode).Get(0).UnwrapOr(FileDefault) + + if r := f.OpenFile(os.O_APPEND|os.O_CREATE|os.O_WRONLY, fmode); r.IsErr() { + return r + } + } + + if _, err := f.file.WriteString(content.Std()); err != nil { + return Err[*File](err) + } + + return Ok(f) +} + +// Chmod changes the mode of the file. +func (f *File) Chmod(mode os.FileMode) Result[*File] { + var err error + if f.file != nil { + err = f.file.Chmod(mode) + } else { + err = os.Chmod(f.name.Std(), mode) + } + + if err != nil { + return Err[*File](err) + } + + return Ok(f) +} + +// Chown changes the owner of the file. +func (f *File) Chown(uid, gid int) Result[*File] { + var err error + if f.file != nil { + err = f.file.Chown(uid, gid) + } else { + err = os.Chown(f.name.Std(), uid, gid) + } + + if err != nil { + return Err[*File](err) + } + + return Ok(f) +} + +// Seek sets the file offset for the next Read or Write operation. The offset +// is specified by the 'offset' parameter, and the 'whence' parameter determines +// the reference point for the offset. +// +// The 'offset' parameter specifies the new offset in bytes relative to the +// reference point determined by 'whence'. If 'whence' is set to io.SeekStart, +// io.SeekCurrent, or io.SeekEnd, the offset is relative to the start of the file, +// the current offset, or the end of the file, respectively. +// +// If the file is not open, this method will attempt to open it. If the open +// operation fails, an error is returned. +// +// If the Seek operation fails, the file is closed, and an error is returned. +// +// Example: +// +// file := g.NewFile("example.txt") +// result := file.Seek(100, io.SeekStart) +// if result.Err() != nil { +// log.Fatal(result.Err()) +// } +// +// Parameters: +// - offset: The new offset in bytes. +// - whence: The reference point for the offset (io.SeekStart, io.SeekCurrent, or io.SeekEnd). +// +// Don't forget to close the file! +func (f *File) Seek(offset int64, whence int) Result[*File] { + if f.file == nil { + if r := f.Open(); r.IsErr() { + return r + } + } + + if _, err := f.file.Seek(offset, whence); err != nil { + f.Close() + return Err[*File](err) + } + + return Ok(f) +} + +// Close closes the File and unlocks its underlying file, if it is not already closed. +func (f *File) Close() error { + if f.file == nil { + return &ErrFileClosed{f.name.Std()} + } + + var err error + + if f.guard { + err = filelock.Unlock(f.file) + } + + if closeErr := f.file.Close(); closeErr != nil { + err = closeErr + } + + f.file = nil + + return err +} + +// Copy copies the file to the specified destination, with the specified mode (optional). +// If no mode is provided, the default FileMode (0644) is used. +func (f *File) Copy(dest String, mode ...os.FileMode) Result[*File] { + if r := f.Open(); r.IsErr() { + return r + } + + defer f.Close() + + nf := NewFile(dest) + if f.guard { + nf.guard = true + } + + return nf.WriteFromReader(f.file, mode...) +} + +// Create is similar to os.Create, but it returns a write-locked file. +// Don't forget to close the file! +func (f *File) Create() Result[*File] { + return f.OpenFile(os.O_RDWR|os.O_CREATE|os.O_TRUNC, FileCreate) +} + +// Dir returns the directory the file is in as an Dir instance. +func (f *File) Dir() Result[*Dir] { + dirPath := f.dirPath() + if dirPath.IsErr() { + return Err[*Dir](dirPath.err) + } + + return Ok(NewDir(dirPath.v)) +} + +// Exist checks if the file exists. +func (f *File) Exist() bool { + if f.dirPath().IsOk() { + filePath := f.filePath() + if filePath.IsOk() { + _, err := os.Stat(filePath.v.Std()) + return !os.IsNotExist(err) + } + } + + return false +} + +// Ext returns the file extension. +func (f *File) Ext() String { return String(filepath.Ext(f.name.Std())) } + +// Guard sets a lock on the file to protect it from concurrent access. +// It returns the File instance with the guard enabled. +func (f *File) Guard() *File { + f.guard = true + return f +} + +// MimeType returns the MIME type of the file as Result[String]. +func (f *File) MimeType() Result[String] { + if r := f.Open(); r.IsErr() { + return Err[String](r.err) + } + + defer f.Close() + + const bufferSize = 512 + + buff := make([]byte, bufferSize) + + bytesRead, err := f.file.ReadAt(buff, 0) + if err != nil && err != io.EOF { + return Err[String](err) + } + + buff = buff[:bytesRead] + + return Ok(String(http.DetectContentType(buff))) +} + +// Move function simply calls [File.Rename] +func (f *File) Move(newpath String) Result[*File] { return f.Rename(newpath) } + +// Name returns the name of the file. +func (f *File) Name() String { + if f.file != nil { + return String(filepath.Base(f.file.Name())) + } + + return String(filepath.Base(f.name.Std())) +} + +// Open is like os.Open, but returns a read-locked file. +// Don't forget to close the file! +func (f *File) Open() Result[*File] { return f.OpenFile(os.O_RDONLY, 0) } + +// OpenFile is like os.OpenFile, but returns a locked file. +// If flag includes os.O_WRONLY or os.O_RDWR, the file is write-locked +// otherwise, it is read-locked. +// Don't forget to close the file! +func (f *File) OpenFile(flag int, perm fs.FileMode) Result[*File] { + file, err := os.OpenFile(f.name.Std(), flag&^os.O_TRUNC, perm) + if err != nil { + return Err[*File](err) + } + + if f.guard { + switch flag & (os.O_RDONLY | os.O_WRONLY | os.O_RDWR) { + case os.O_WRONLY, os.O_RDWR: + err = filelock.Lock(file) + default: + err = filelock.RLock(file) + } + + if err != nil { + file.Close() + return Err[*File](err) + } + } + + if flag&os.O_TRUNC == os.O_TRUNC { + if err := file.Truncate(0); err != nil { + if fi, statErr := file.Stat(); statErr != nil || fi.Mode().IsRegular() { + if f.guard { + filelock.Unlock(file) + } + + file.Close() + + return Err[*File](err) + } + } + } + + f.file = file + + return Ok(f) +} + +// Path returns the absolute path of the file. +func (f *File) Path() Result[String] { return f.filePath() } + +// Print writes the content of the File to the standard output (console) +// and returns the File unchanged. +func (f *File) Print() *File { fmt.Print(f); return f } + +// Println writes the content of the File to the standard output (console) with a newline +// and returns the File unchanged. +func (f *File) Println() *File { fmt.Println(f); return f } + +// Read opens the named file with a read-lock and returns its contents. +func (f *File) Read() Result[String] { + if r := f.Open(); r.IsErr() { + return Err[String](r.err) + } + + defer f.Close() + + content, err := io.ReadAll(f.file) + if err != nil { + return Err[String](err) + } + + return Ok(String(content)) +} + +// Remove removes the file. +func (f *File) Remove() Result[*File] { + if err := os.Remove(f.name.Std()); err != nil { + return Err[*File](err) + } + + return Ok(f) +} + +// Rename renames the file to the specified new path. +func (f *File) Rename(newpath String) Result[*File] { + if !f.Exist() { + return Err[*File](&ErrFileNotExist{f.name.Std()}) + } + + nf := NewFile(newpath) + if f.guard { + nf.guard = true + } + + if r := nf.createAll(); r.IsErr() { + return r + } + + if err := os.Rename(f.name.Std(), newpath.Std()); err != nil { + return Err[*File](err) + } + + return Ok(nf) +} + +// Split splits the file path into its directory and file components. +func (f *File) Split() (*Dir, *File) { + path := f.Path() + if path.IsErr() { + return nil, nil + } + + dir, file := filepath.Split(path.v.Std()) + + return NewDir(String(dir)), NewFile(String(file)) +} + +// Stat returns the fs.FileInfo of the file. +// It calls the file's Stat method if the file is open, or os.Stat otherwise. +func (f *File) Stat() Result[fs.FileInfo] { + if f.file != nil { + return ResultOf(f.file.Stat()) + } + + return ResultOf(os.Stat(f.name.Std())) +} + +// Lstat retrieves information about the symbolic link represented by the *File instance. +// It returns a Result[fs.FileInfo] containing details about the symbolic link's metadata. +// Unlike Stat, Lstat does not follow the link and provides information about the link itself. +func (f *File) Lstat() Result[fs.FileInfo] { + return ResultOf(os.Lstat(f.name.Std())) +} + +// IsDir checks if the file is a directory. +func (f *File) IsDir() bool { + stat := f.Stat() + return stat.IsOk() && stat.v.IsDir() +} + +// IsLink checks if the file is a symbolic link. +func (f *File) IsLink() bool { + stat := f.Lstat() + return stat.IsOk() && stat.v.Mode()&os.ModeSymlink != 0 +} + +// Std returns the underlying *os.File instance. +// Don't forget to close the file with g.File().Close()! +func (f *File) Std() *os.File { return f.file } + +// CreateTemp creates a new temporary file in the specified directory with the +// specified name pattern and returns a Result, which contains a pointer to the File +// or an error if the operation fails. +// If no directory is specified, the default directory for temporary files is used. +// If no name pattern is specified, the default pattern "*" is used. +// +// Parameters: +// +// - args ...String: A variadic parameter specifying the directory and/or name +// pattern for the temporary file. +// +// Returns: +// +// - *File: A pointer to the File representing the temporary file. +// +// Example usage: +// +// f := g.NewFile("") +// tmpfile := f.CreateTemp() // Creates a temporary file with default settings +// tmpfileWithDir := f.CreateTemp("mydir") // Creates a temporary file in "mydir" directory +// tmpfileWithPattern := f.CreateTemp("", "tmp") // Creates a temporary file with "tmp" pattern +func (f *File) CreateTemp(args ...String) Result[*File] { + dir := "" + pattern := "*" + + if len(args) != 0 { + if len(args) > 1 { + pattern = args[1].Std() + } + + dir = args[0].Std() + } + + tmpfile, err := os.CreateTemp(dir, pattern) + if err != nil { + return Err[*File](err) + } + + ntmpfile := NewFile(String(tmpfile.Name())) + ntmpfile.file = tmpfile + if f.guard { + ntmpfile.guard = true + } + + defer ntmpfile.Close() + + return Ok(ntmpfile) +} + +// Write opens the named file (creating it with the given permissions if needed), +// then write-locks it and overwrites it with the given content. +func (f *File) Write(content String, mode ...os.FileMode) Result[*File] { + return f.WriteFromReader(content.Reader(), mode...) +} + +// WriteFromReader takes an io.Reader (scr) as input and writes the data from the reader into the file. +// If no FileMode is provided, the default FileMode (0644) is used. +func (f *File) WriteFromReader(scr io.Reader, mode ...os.FileMode) Result[*File] { + if f.file == nil { + if r := f.createAll(); r.IsErr() { + return r + } + } + + filePath := f.filePath() + if filePath.IsErr() { + return Err[*File](filePath.err) + } + + fmode := Slice[os.FileMode](mode).Get(0).UnwrapOr(FileDefault) + + if r := f.OpenFile(os.O_WRONLY|os.O_CREATE|os.O_TRUNC, fmode); r.IsErr() { + return Err[*File](r.err) + } + + defer f.Close() + + _, err := io.Copy(f.file, scr) + if err != nil { + return Err[*File](err) + } + + err = f.file.Sync() + if err != nil { + return Err[*File](err) + } + + return Ok(f) +} + +// dirPath returns the absolute path of the directory containing the file. +func (f *File) dirPath() Result[String] { + var ( + path string + err error + ) + + if f.IsDir() { + path, err = filepath.Abs(f.name.Std()) + } else { + path, err = filepath.Abs(filepath.Dir(f.name.Std())) + } + + if err != nil { + return Err[String](err) + } + + return Ok(String(path)) +} + +// filePath returns the full file path, including the directory and file name. +func (f *File) filePath() Result[String] { + dirPath := f.dirPath() + if dirPath.IsErr() { + return Err[String](dirPath.err) + } + + if f.IsDir() { + return dirPath + } + + return Ok(String(filepath.Join(dirPath.v.Std(), filepath.Base(f.name.Std())))) +} + +func (f *File) createAll() Result[*File] { + dirPath := f.dirPath() + if dirPath.IsErr() { + return Err[*File](dirPath.err) + } + + if !f.Exist() { + if err := os.MkdirAll(dirPath.v.Std(), DirDefault); err != nil { + return Err[*File](err) + } + } + + return Ok(f) +} diff --git a/backend/vendor/github.com/enetx/g/file_encdec.go b/backend/vendor/github.com/enetx/g/file_encdec.go new file mode 100644 index 0000000..196b768 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/file_encdec.go @@ -0,0 +1,140 @@ +package g + +import ( + "encoding/gob" + "encoding/json" +) + +type ( + // fencode represents a wrapper for file encoding. + fencode struct{ f *File } + + // fdecode represents a wrapper for file decoding. + fdecode struct{ f *File } +) + +// Encode returns an fencode struct wrapping the given file for encoding. +func (f *File) Encode() fencode { return fencode{f} } + +// Decode returns an fdecode struct wrapping the given file for decoding. +func (f *File) Decode() fdecode { return fdecode{f} } + +// Gob encodes the provided data using the encoding/gob package and writes it to the file. +// It returns a Result[*File] indicating the success or failure of the encoding operation. +// +// If the encoding operation is successful, the created file is closed automatically. +// +// Usage: +// +// data := g.SliceOf(1, 2, 3, 4) +// result := g.NewFile("somefile.gob").Encode().Gob(data) +// +// Parameters: +// - data: The data to be encoded and written to the file. +// +// Returns: +// - Result[*File]: A Result containing a *File if the operation is successful; otherwise, an error Result. +func (fe fencode) Gob(data any) Result[*File] { + r := fe.f.Create() + if r.IsErr() { + return r + } + + defer r.v.Close() + + if err := gob.NewEncoder(r.v.Std()).Encode(data); err != nil { + return Err[*File](err) + } + + return r +} + +// Gob decodes data from the file using the encoding/gob package and populates the provided data structure. +// It returns a Result[*File] indicating the success or failure of the decoding operation. +// +// If the decoding operation is successful, the file is closed automatically. +// +// Usage: +// +// var data g.Slice[int] +// result := g.NewFile("somefile.gob").Decode().Gob(&data) +// +// Parameters: +// - data: A pointer to the data structure where the decoded data will be stored. +// +// Returns: +// - Result[*File]: A Result containing a *File if the operation is successful; otherwise, an error Result. +func (fd fdecode) Gob(data any) Result[*File] { + r := fd.f.Open() + if r.IsErr() { + return r + } + + defer r.v.Close() + + if err := gob.NewDecoder(r.v.Std()).Decode(data); err != nil { + return Err[*File](err) + } + + return r +} + +// JSON encodes the provided data using the encoding/json package and writes it to the file. +// It returns a Result[*File] indicating the success or failure of the encoding operation. +// +// If the encoding operation is successful, the created file is closed automatically. +// +// Usage: +// +// data := g.SliceOf(1, 2, 3, 4) +// result := g.NewFile("somefile.json").Encode().JSON(data) +// +// Parameters: +// - data: The data to be encoded and written to the file. +// +// Returns: +// - Result[*File]: A Result containing a *File if the operation is successful; otherwise, an error Result. +func (fe fencode) JSON(data any) Result[*File] { + r := fe.f.Create() + if r.IsErr() { + return r + } + + defer r.v.Close() + + if err := json.NewEncoder(r.v.Std()).Encode(data); err != nil { + return Err[*File](err) + } + + return r +} + +// JSON decodes data from the file using the encoding/json package and populates the provided data structure. +// It returns a Result[*File] indicating the success or failure of the decoding operation. +// +// If the decoding operation is successful, the file is closed automatically. +// +// Usage: +// +// var data g.Slice[int] +// result := g.NewFile("somefile.json").Decode().JSON(&data) +// +// Parameters: +// - data: A pointer to the data structure where the decoded data will be stored. +// +// Returns: +// - Result[*File]: A Result containing a *File if the operation is successful; otherwise, an error Result. +func (fd fdecode) JSON(data any) Result[*File] { + r := fd.f.Open() + if r.IsErr() { + return r + } + + defer r.v.Close() + + if err := json.NewDecoder(r.v.Std()).Decode(data); err != nil { + return Err[*File](err) + } + + return r +} diff --git a/backend/vendor/github.com/enetx/g/float.go b/backend/vendor/github.com/enetx/g/float.go new file mode 100644 index 0000000..4984f54 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/float.go @@ -0,0 +1,233 @@ +package g + +import ( + "encoding/binary" + "fmt" + "math" + "math/big" + "strconv" + + "github.com/enetx/g/cmp" + "github.com/enetx/g/constraints" +) + +// NewFloat creates a new Float with the provided value. +func NewFloat[T constraints.Float | constraints.Integer](float T) Float { return Float(float) } + +// Transform applies a transformation function to the Float and returns the result. +func (f Float) Transform(fn func(Float) Float) Float { return fn(f) } + +// BytesBE returns the IEEE-754 representation of the Float as Bytes in BigEndian order. +// The Float is converted to its 64-bit IEEE-754 binary representation. +func (f Float) BytesBE() Bytes { + var buf [8]byte + bits := math.Float64bits(float64(f)) + binary.BigEndian.PutUint64(buf[:], bits) + + return Bytes(buf[:]) +} + +// BytesLE returns the IEEE-754 representation of the Float as Bytes in LittleEndian order. +// The Float is converted to its 64-bit IEEE-754 binary representation. +func (f Float) BytesLE() Bytes { + var buf [8]byte + bits := math.Float64bits(float64(f)) + binary.LittleEndian.PutUint64(buf[:], bits) + + return Bytes(buf[:]) +} + +// Min returns the minimum of two Floats. +func (f Float) Min(b ...Float) Float { return cmp.Min(append(b, f)...) } + +// Max returns the maximum of two Floats. +func (f Float) Max(b ...Float) Float { return cmp.Max(append(b, f)...) } + +// Sqrt returns the square root of the Float. +// +// Returns: +// - Float: The square root of the Float. If the Float is negative, the result is NaN. +// +// Example usage: +// +// f := g.NewFloat(9) +// result := f.Sqrt() // result = 3 +func (f Float) Sqrt() Float { return Float(math.Sqrt(f.Std())) } + +// Pow raises the Float to the power of the given exponent. +// +// Parameters: +// - exp (Float): The exponent to raise the Float to. +// +// Returns: +// - Float: The result of raising the Float to the specified power. +// +// Example usage: +// +// f := g.NewFloat(2) +// result := f.Pow(3) // result = 8 +func (f Float) Pow(exp Float) Float { return Float(math.Pow(f.Std(), exp.Std())) } + +// Mod returns the floating-point remainder of f / b as defined by IEEE 754. +// +// Parameters: +// - b (Float): The divisor. +// +// Returns: +// - Float: The remainder of f / b. +// +// Example usage: +// +// f := g.NewFloat(5.5) +// result := f.Mod(2) // result = 1.5 +func (f Float) Mod(b Float) Float { return Float(math.Mod(f.Std(), b.Std())) } + +// Abs returns the absolute value of the Float. +func (f Float) Abs() Float { return Float(math.Abs(f.Std())) } + +// Add adds two Floats and returns the result. +func (f Float) Add(b Float) Float { return f + b } + +// BigFloat returns the Float as a *big.Float. +func (f Float) BigFloat() *big.Float { return big.NewFloat(f.Std()) } + +// Cmp compares two Floats and returns an cmp.Ordering. +func (f Float) Cmp(b Float) cmp.Ordering { return cmp.Cmp(f, b) } + +// Div divides two Floats and returns the result. +func (f Float) Div(b Float) Float { return f / b } + +// IsZero checks if the Float is 0. +func (f Float) IsZero() bool { return f.Eq(0) } + +// Eq checks if two Floats are equal. +func (f Float) Eq(b Float) bool { return f.Cmp(b).IsEq() } + +// Std returns the Float as a float64. +func (f Float) Std() float64 { return float64(f) } + +// Gt checks if the Float is greater than the specified Float. +func (f Float) Gt(b Float) bool { return f.Cmp(b).IsGt() } + +// Int returns the Float as an Int. +func (f Float) Int() Int { return Int(f) } + +// String returns the Float as an String. +func (f Float) String() String { return String(strconv.FormatFloat(f.Std(), 'g', -1, 64)) } + +// Lt checks if the Float is less than the specified Float. +func (f Float) Lt(b Float) bool { return f.Cmp(b).IsLt() } + +// Mul multiplies two Floats and returns the result. +func (f Float) Mul(b Float) Float { return f * b } + +// Ne checks if two Floats are not equal. +func (f Float) Ne(b Float) bool { return !f.Eq(b) } + +// Round rounds the Float to the nearest integer and returns the result as an Int. +func (f Float) Round() Int { return Int(math.Round(f.Std())) } + +// RoundDecimal rounds the Float value to the specified number of decimal places. +// +// Parameters: +// - precision (Int): The number of decimal places to round to. If negative, the Float is returned unchanged. +// Values greater than 308 are capped at 308 to prevent overflow. +// +// Returns: +// - Float: A new Float value rounded to the specified number of decimal places. +func (f Float) RoundDecimal(precision Int) Float { + if precision < 0 { + return f + } + + if precision > 308 { // 10^309 == +Inf + precision = 308 + } + + pow := math.Pow(10, float64(precision)) + + return Float(math.Round(f.Std()*pow) / pow) +} + +// TruncDecimal truncates the Float value to the specified number of decimal places. +// +// Parameters: +// - precision (Int): The number of decimal places to truncate to. If negative, the Float is returned unchanged. +// Values greater than 308 are capped at 308. +// +// Returns: +// - Float: A new Float value truncated to the specified number of decimal places. +func (f Float) TruncDecimal(precision Int) Float { + if precision < 0 { + return f + } + + if precision > 308 { + precision = 308 + } + + pow := math.Pow(10, float64(precision)) + + return Float(math.Trunc(f.Std()*pow) / pow) +} + +// CeilDecimal rounds the Float value up (towards +Inf) to the specified number of decimal places. +// +// Parameters: +// - precision (Int): The number of decimal places to round up to. If negative, the Float is returned unchanged. +// Values greater than 308 are capped at 308. +// +// Returns: +// - Float: A new Float value rounded up to the specified number of decimal places. +func (f Float) CeilDecimal(precision Int) Float { + if precision < 0 { + return f + } + + if precision > 308 { + precision = 308 + } + + pow := math.Pow(10, float64(precision)) + + return Float(math.Ceil(f.Std()*pow) / pow) +} + +// FloorDecimal rounds the Float value down (towards -Inf) to the specified number of decimal places. +// +// Parameters: +// - precision (Int): The number of decimal places to round down to. If negative, the Float is returned unchanged. +// Values greater than 308 are capped at 308. +// +// Returns: +// - Float: A new Float value rounded down to the specified number of decimal places. +func (f Float) FloorDecimal(precision Int) Float { + if precision < 0 { + return f + } + + if precision > 308 { + precision = 308 + } + + pow := math.Pow(10, float64(precision)) + + return Float(math.Floor(f.Std()*pow) / pow) +} + +// Sub subtracts two Floats and returns the result. +func (f Float) Sub(b Float) Float { return f - b } + +// Bits returns IEEE-754 representation of f. +func (f Float) Bits() uint64 { return math.Float64bits(f.Std()) } + +// Float32 returns the Float as a float32. +func (f Float) Float32() float32 { return float32(f) } + +// Print writes the value of the Float to the standard output (console) +// and returns the Float unchanged. +func (f Float) Print() Float { fmt.Print(f); return f } + +// Println writes the value of the Float to the standard output (console) with a newline +// and returns the Float unchanged. +func (f Float) Println() Float { fmt.Println(f); return f } diff --git a/backend/vendor/github.com/enetx/g/globals.go b/backend/vendor/github.com/enetx/g/globals.go new file mode 100644 index 0000000..536b3f1 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/globals.go @@ -0,0 +1,22 @@ +package g + +import ( + "os" +) + +const ( + ASCII_LETTERS String = ASCII_LOWERCASE + ASCII_UPPERCASE + ASCII_LOWERCASE String = "abcdefghijklmnopqrstuvwxyz" + ASCII_UPPERCASE String = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" + DIGITS String = "0123456789" + HEXDIGITS String = "0123456789abcdefABCDEF" + OCTDIGITS String = "01234567" + PUNCTUATION String = `!"#$%&'()*+,-./:;<=>?@[\]^{|}~` + "`" + + FileDefault os.FileMode = 0o644 + FileCreate os.FileMode = 0o666 + DirDefault os.FileMode = 0o755 + FullAccess os.FileMode = 0o777 + + PathSeperator = String(os.PathSeparator) +) diff --git a/backend/vendor/github.com/enetx/g/heap.go b/backend/vendor/github.com/enetx/g/heap.go new file mode 100644 index 0000000..2515590 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/heap.go @@ -0,0 +1,253 @@ +package g + +import ( + "fmt" + + "github.com/enetx/g/cmp" +) + +// NewHeap creates a new heap with the given comparison function. +// The comparison function should return: +// - cmp.Less if the first argument should have higher priority +// - cmp.Greater if the second argument should have higher priority +// - cmp.Equal if they have equal priority +func NewHeap[T any](compareFn func(T, T) cmp.Ordering) *Heap[T] { + return &Heap[T]{ + data: make(Slice[T], 0), + cmp: compareFn, + } +} + +// Transform applies a transformation function to the Heap and returns the result. +func (h *Heap[T]) Transform(fn func(*Heap[T]) *Heap[T]) *Heap[T] { return fn(h) } + +// Iter returns a non-consuming iterator that yields elements in sorted order. +// +// The iterator creates a clone of the heap and yields elements by repeatedly +// calling Pop() on the clone, ensuring the original heap remains unchanged. +// Elements are yielded in the order determined by the heap's comparison function +// (smallest first for min-heap, largest first for max-heap). +// +// Time complexity: O(n log n) for full iteration +// Space complexity: O(n) for the heap clone +// +// Returns: +// +// - SeqSlice[T]: An iterator that yields elements in sorted order +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(10, 5, 15, 1, 8) +// +// // Iterate without consuming the original heap +// heap.Iter().ForEach(func(x int) { +// fmt.Printf("%d ", x) // Output: 1 5 8 10 15 +// }) +// +// fmt.Printf("Heap still has %d elements\n", heap.Len()) // Output: 5 +// +// // Can be used with other iterator methods +// firstThree := heap.Iter().Take(3).Collect() // [1, 5, 8] +// evenNumbers := heap.Iter().Filter(func(x int) bool { +// return x%2 == 0 +// }).Collect() // [8, 10] +func (h *Heap[T]) Iter() SeqHeap[T] { + return func(yield func(T) bool) { + clone := h.Clone() + for !clone.Empty() { + if !yield(clone.Pop().Some()) { + return + } + } + } +} + +// IntoIter returns a consuming iterator that yields elements in sorted order. +// +// This iterator consumes the original heap by repeatedly calling Pop() until +// the heap is empty. After iteration completes (or is stopped early), the +// original heap will be empty. Elements are yielded in the order determined +// by the heap's comparison function (smallest first for min-heap, largest first for max-heap). +// +// Use this method when you want to consume the heap and don't need the original +// data structure afterwards, or when you want to transfer ownership of the elements. +// +// Time complexity: O(n log n) for full iteration +// Space complexity: O(1) - no additional memory allocation +// +// Returns: +// +// - SeqSlice[T]: An iterator that yields elements in sorted order while consuming the heap +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(10, 5, 15, 1, 8) +// +// // Consume the heap while iterating +// result := heap.IntoIter().Collect() // [1, 5, 8, 10, 15] +// +// fmt.Printf("Heap now has %d elements\n", heap.Len()) // Output: 0 +// +// // Can be stopped early, leaving remaining elements in heap +// heap2 := g.NewHeap(cmp.Cmp[int]) +// heap2.Push(20, 25, 15, 30) +// +// heap2.IntoIter().Take(2).ForEach(func(x int) { +// fmt.Printf("%d ", x) // Output: 15 20 +// }) +// fmt.Printf("Remaining: %d elements\n", heap2.Len()) // Output: 2 +func (h *Heap[T]) IntoIter() SeqHeap[T] { + return func(yield func(T) bool) { + for !h.Empty() { + if !yield(h.Pop().Some()) { + return + } + } + } +} + +// Push adds one or more items to the heap. +func (h *Heap[T]) Push(items ...T) { + for _, item := range items { + h.data = append(h.data, item) + h.heapifyUp(len(h.data) - 1) + } +} + +// Pop removes and returns the top element from the heap. +// Returns None if the heap is empty. +func (h *Heap[T]) Pop() Option[T] { + if len(h.data) == 0 { + return None[T]() + } + + top := h.data[0] + last := len(h.data) - 1 + h.data[0] = h.data[last] + h.data = h.data[:last] + + if len(h.data) > 0 { + h.heapifyDown(0) + } + + return Some(top) +} + +// Peek returns the top element without removing it. +// Returns None if the heap is empty. +func (h *Heap[T]) Peek() Option[T] { + if len(h.data) == 0 { + return None[T]() + } + + return Some(h.data[0]) +} + +// Len returns the number of elements in the heap. +func (h *Heap[T]) Len() Int { + return h.data.Len() +} + +// Empty returns true if the heap contains no elements. +func (h *Heap[T]) Empty() bool { + return len(h.data) == 0 +} + +// ToSlice returns a slice containing all elements in the heap. +// The order is not guaranteed to be sorted. +func (h *Heap[T]) ToSlice() Slice[T] { + result := make(Slice[T], len(h.data)) + copy(result, h.data) + + return result +} + +// Clear removes all elements from the heap. +func (h *Heap[T]) Clear() { + h.data = h.data[:0] +} + +// Clone creates a deep copy of the heap. +func (h *Heap[T]) Clone() *Heap[T] { + return &Heap[T]{ + data: h.data.Clone(), + cmp: h.cmp, + } +} + +// heapify transforms the entire data slice into a valid heap. +func (h *Heap[T]) heapify() { + for i := len(h.data)/2 - 1; i >= 0; i-- { + h.heapifyDown(i) + } +} + +// heapifyUp maintains heap property by moving element up. +func (h *Heap[T]) heapifyUp(idx int) { + for idx > 0 { + parent := (idx - 1) / 2 + + if h.cmp(h.data[idx], h.data[parent]) != cmp.Less { + break + } + + h.data[idx], h.data[parent] = h.data[parent], h.data[idx] + idx = parent + } +} + +// heapifyDown maintains heap property by moving element down. +func (h *Heap[T]) heapifyDown(idx int) { + for { + smallest := idx + left := 2*idx + 1 + right := 2*idx + 2 + + if left < len(h.data) && h.cmp(h.data[left], h.data[smallest]) == cmp.Less { + smallest = left + } + + if right < len(h.data) && h.cmp(h.data[right], h.data[smallest]) == cmp.Less { + smallest = right + } + + if smallest == idx { + break + } + + h.data[idx], h.data[smallest] = h.data[smallest], h.data[idx] + idx = smallest + } +} + +// String returns a string representation of the heap. +func (h Heap[T]) String() string { + if len(h.data) == 0 { + return "Heap[]" + } + + var b Builder + b.WriteString("Heap[") + + for i, v := range h.data { + if i > 0 { + b.WriteString(", ") + } + + b.WriteString(Format("{}", v)) + } + + b.WriteString("]") + + return b.String().Std() +} + +// Print writes the elements of the Heap to the standard output (console) +// and returns the Heap unchanged. +func (h *Heap[T]) Print() *Heap[T] { fmt.Print(h); return h } + +// Println writes the elements of the Heap to the standard output (console) with a newline +// and returns the Heap unchanged. +func (h *Heap[T]) Println() *Heap[T] { fmt.Println(h); return h } diff --git a/backend/vendor/github.com/enetx/g/heap_iter.go b/backend/vendor/github.com/enetx/g/heap_iter.go new file mode 100644 index 0000000..66a11a7 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/heap_iter.go @@ -0,0 +1,961 @@ +package g + +import ( + "context" + "reflect" + "runtime" + + "github.com/enetx/g/cmp" + "github.com/enetx/g/f" + "github.com/enetx/iter" +) + +// Pull converts the "push-style" iterator sequence seq +// into a "pull-style" iterator accessed by the two functions +// next and stop. +// +// Next returns the next value in the sequence +// and a boolean indicating whether the value is valid. +// When the sequence is over, next returns the zero V and false. +// It is valid to call next after reaching the end of the sequence +// or after calling stop. These calls will continue +// to return the zero V and false. +// +// Stop ends the iteration. It must be called when the caller is +// no longer interested in next values and next has not yet +// signaled that the sequence is over (with a false boolean return). +// It is valid to call stop multiple times and when next has +// already returned false. +// +// It is an error to call next or stop from multiple goroutines +// simultaneously. +func (seq SeqHeap[V]) Pull() (func() (V, bool), func()) { return iter.Pull(iter.Seq[V](seq)) } + +// Parallel converts a sequential heap iterator into a parallel iterator with the specified number of workers. +// If no worker count is provided, it defaults to the number of CPU cores. +// The parallel iterator processes elements concurrently using a worker pool. +func (seq SeqHeap[V]) Parallel(workers ...Int) SeqHeapPar[V] { + numCPU := Int(runtime.NumCPU()) + count := Slice[Int](workers).Get(0).UnwrapOr(numCPU) + + if count.Lte(0) { + count = numCPU + } + + return SeqHeapPar[V]{ + seq: seq, + workers: count, + process: func(v V) (V, bool) { return v, true }, + } +} + +// All checks whether all elements in the iterator satisfy the provided condition. +// This function is useful when you want to determine if all elements in an iterator +// meet a specific criteria. +// +// Parameters: +// - fn func(V) bool: A function that returns a boolean indicating whether the element satisfies +// the condition. +// +// Returns: +// - bool: True if all elements in the iterator satisfy the condition, false otherwise. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 4, 5, 6, 7, -1, -2) +// isPositive := func(num int) bool { return num > 0 } +// allPositive := heap.Iter().All(isPositive) +// +// The resulting allPositive will be true if all elements returned by the iterator are positive. +func (seq SeqHeap[V]) All(fn func(v V) bool) bool { return iter.All(iter.Seq[V](seq), fn) } + +// Any checks whether any element in the iterator satisfies the provided condition. +// This function is useful when you want to determine if at least one element in an iterator +// meets a specific criteria. +// +// Parameters: +// - fn func(V) bool: A function that returns a boolean indicating whether the element satisfies +// the condition. +// +// Returns: +// - bool: True if at least one element in the iterator satisfies the condition, false otherwise. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 3, 5, 7, 9) +// isEven := func(num int) bool { return num%2 == 0 } +// anyEven := heap.Iter().Any(isEven) +// +// The resulting anyEven will be true if at least one element returned by the iterator is even. +func (seq SeqHeap[V]) Any(fn func(V) bool) bool { return iter.Any(iter.Seq[V](seq), fn) } + +// Chain concatenates the current iterator with other iterators, returning a new iterator. +// +// The function creates a new iterator that combines the elements of the current iterator +// with elements from the provided iterators in the order they are given. +// +// Params: +// +// - seqs ([]SeqHeap[V]): Other iterators to be concatenated with the current iterator. +// +// Returns: +// +// - SeqHeap[V]: A new iterator containing elements from the current iterator and the provided iterators. +// +// Example usage: +// +// heap1 := g.NewHeap(cmp.Cmp[int]) +// heap1.Push(1, 2, 3) +// heap2 := g.NewHeap(cmp.Cmp[int]) +// heap2.Push(4, 5, 6) +// heap1.Iter().Chain(heap2.Iter()).Collect() // Creates new heap with all elements +// +// The resulting iterator will contain elements from both iterators in the specified order. +func (seq SeqHeap[V]) Chain(seqs ...SeqHeap[V]) SeqHeap[V] { + iterSeqs := make([]iter.Seq[V], len(seqs)) + for i, s := range seqs { + iterSeqs[i] = iter.Seq[V](s) + } + + return SeqHeap[V](iter.Chain(iter.Seq[V](seq), iterSeqs...)) +} + +// Chunks returns an iterator that yields chunks of elements of the specified size. +// +// The function creates a new iterator that yields chunks of elements from the original iterator, +// with each chunk containing elements of the specified size. +// +// Params: +// +// - n (Int): The size of each chunk. +// +// Returns: +// +// - SeqSlices[V]: An iterator yielding chunks of elements of the specified size. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 4, 5, 6) +// chunks := heap.Iter().Chunks(2).Collect() +// +// Output: [Slice[1, 2] Slice[3, 4] Slice[5, 6]] +// +// The resulting iterator will yield chunks of elements, each containing the specified number of elements. +func (seq SeqHeap[V]) Chunks(n Int) SeqSlices[V] { + return SeqSlices[V](iter.Chunks(iter.Seq[V](seq), int(n))) +} + +// Collect gathers all elements from the iterator into a new Heap with a custom comparison function. +func (seq SeqHeap[V]) Collect(compareFn func(V, V) cmp.Ordering) *Heap[V] { + result := NewHeap(compareFn) + seq(func(v V) bool { + result.Push(v) + return true + }) + + return result +} + +// Count consumes the iterator, counting the number of iterations and returning it. +func (seq SeqHeap[V]) Count() Int { return Int(iter.Count(iter.Seq[V](seq))) } + +// Counter returns a map where each key is a unique element +// from the heap and each value is the count of how many times that element appears. +// +// The function counts the occurrences of each element in the heap +// and returns a map representing the unique elements and their respective counts. +// This method uses iter.Counter from the iter package. +// +// Returns: +// +// - SeqMapOrd[V, Int]: with keys representing the unique elements in the heap +// and values representing the counts of those elements. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 1, 2, 1) +// counts := heap.Iter().Counter() +// // The counts map will contain: +// // 1 -> 3 (since 1 appears three times) +// // 2 -> 2 (since 2 appears two times) +// // 3 -> 1 (since 3 appears once) +func (seq SeqHeap[V]) Counter() SeqMapOrd[any, Int] { + return func(yield func(any, Int) bool) { + for k, v := range iter.Counter(iter.Seq[V](seq)) { + if !yield(k, Int(v)) { + return + } + } + } +} + +// GroupBy groups consecutive elements of the sequence based on a custom equality function. +// +// The provided function `fn` takes two consecutive elements `a` and `b` and returns `true` +// if they belong to the same group, or `false` if a new group should start. +// The function returns a `SeqSlices[V]`, where each `[]V` represents a group of consecutive +// elements that satisfy the provided equality condition. +// +// Notes: +// - Each group is returned as a copy of the elements, since `SeqHeap` does not guarantee +// that elements share the same backing array. +// +// Parameters: +// - fn (func(a, b V) bool): Function that determines whether two consecutive elements belong to the same group. +// +// Returns: +// - SeqSlices[V]: An iterator yielding slices, each containing one group. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 1, 2, 3, 2, 3, 4) +// groups := heap.Iter().GroupBy(func(a, b int) bool { return a <= b }).Collect() +// // Output: [Slice[1, 1, 2, 3] Slice[2, 3, 4]] +// +// The resulting iterator will yield groups of consecutive elements according to the provided function. +func (seq SeqHeap[V]) GroupBy(fn func(a, b V) bool) SeqSlices[V] { + return SeqSlices[V](iter.GroupByAdjacent(iter.Seq[V](seq), fn)) +} + +// Combinations generates all combinations of length 'n' from the sequence. +func (seq SeqHeap[V]) Combinations(size Int) SeqSlices[V] { + return SeqSlices[V](iter.Combinations(iter.Seq[V](seq), int(size))) +} + +// Cycle returns an iterator that endlessly repeats the elements of the current sequence. +func (seq SeqHeap[V]) Cycle() SeqHeap[V] { + return SeqHeap[V](iter.Cycle(iter.Seq[V](seq))) +} + +// Enumerate adds an index to each element in the iterator. +// +// Returns: +// +// - SeqMapOrd[Int, V] An iterator with each element of type Pair[Int, V], where the first +// element of the pair is the index and the second element is the original element from the +// iterator. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[g.String]) +// heap.Push("bbb", "ddd", "xxx", "aaa", "ccc") +// ps := heap.Iter(). +// Enumerate(). +// Collect() +// +// ps.Print() +// +// Output: MapOrd{0:aaa, 1:bbb, 2:ccc, 3:ddd, 4:xxx} +func (seq SeqHeap[V]) Enumerate() SeqMapOrd[Int, V] { + return func(yield func(Int, V) bool) { + iterEnum := iter.Enumerate(iter.Seq[V](seq), 0) + iterEnum(func(i int, v V) bool { + return yield(Int(i), v) + }) + } +} + +// Dedup creates a new iterator that removes consecutive duplicate elements from the original iterator, +// leaving only one occurrence of each unique element. If the iterator is sorted, all elements will be unique. +// +// Parameters: +// - None +// +// Returns: +// - SeqHeap[V]: A new iterator with consecutive duplicates removed. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 2, 3, 4, 4, 4, 5) +// iter := heap.Iter().Dedup() +// result := iter.CollectWith(cmp.Cmp[int]) +// result.Iter().ForEach(func(v int) { fmt.Print(v, " ") }) +// +// Output: 1 2 3 4 5 +// +// The resulting iterator will contain only unique elements, removing consecutive duplicates. +func (seq SeqHeap[V]) Dedup() SeqHeap[V] { + return SeqHeap[V](iter.DedupBy(iter.Seq[V](seq), func(a, b V) bool { + if f.IsComparable(a) { + return f.Eq[any](a)(b) + } + return f.Eqd(a)(b) + })) +} + +// Filter returns a new iterator containing only the elements that satisfy the provided function. +// +// The function applies the provided function to each element of the iterator. +// If the function returns true for an element, that element is included in the resulting iterator. +// +// Parameters: +// +// - fn (func(V) bool): The function to be applied to each element of the iterator +// to determine if it should be included in the result. +// +// Returns: +// +// - SeqHeap[V]: A new iterator containing the elements that satisfy the given condition. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 4, 5) +// even := heap.Iter(). +// Filter( +// func(val int) bool { +// return val%2 == 0 +// }). +// CollectWith(cmp.Cmp[int]) +// +// The resulting iterator will contain only the elements that satisfy the provided function. +func (seq SeqHeap[V]) Filter(fn func(V) bool) SeqHeap[V] { + return SeqHeap[V](iter.Filter(iter.Seq[V](seq), fn)) +} + +// Exclude returns a new iterator excluding elements that satisfy the provided function. +// +// The function applies the provided function to each element of the iterator. +// If the function returns true for an element, that element is excluded from the resulting iterator. +// +// Parameters: +// +// - fn (func(V) bool): The function to be applied to each element of the iterator +// to determine if it should be excluded from the result. +// +// Returns: +// +// - SeqHeap[V]: A new iterator containing the elements that do not satisfy the given condition. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 4, 5) +// notEven := heap.Iter(). +// Exclude( +// func(val int) bool { +// return val%2 == 0 +// }). +// CollectWith(cmp.Cmp[int]) +// +// The resulting iterator will contain only the elements that do not satisfy the provided function. +func (seq SeqHeap[V]) Exclude(fn func(V) bool) SeqHeap[V] { + return SeqHeap[V](iter.Exclude(iter.Seq[V](seq), fn)) +} + +// Fold accumulates values in the iterator using a function. +// +// The function iterates through the elements of the iterator, accumulating values +// using the provided function and an initial value. +// +// Params: +// +// - init (V): The initial value for accumulation. +// - fn (func(V, V) V): The function that accumulates values; it takes two arguments +// of type V and returns a value of type V. +// +// Returns: +// +// - T: The accumulated value after applying the function to all elements. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 4, 5) +// sum := heap.Iter(). +// Fold(0, +// func(acc, val int) int { +// return acc + val +// }) +// fmt.Println(sum) +// +// Output: 15. +// +// The resulting value will be the accumulation of elements based on the provided function. +func (seq SeqHeap[V]) Fold(init V, fn func(acc, val V) V) V { + return iter.Fold(iter.Seq[V](seq), init, fn) +} + +// Reduce aggregates elements of the sequence using the provided function. +// The first element of the sequence is used as the initial accumulator value. +// If the sequence is empty, it returns None[V]. +// +// Params: +// - fn (func(V, V) V): Function that combines two values into one. +// +// Returns: +// - Option[V]: The accumulated value wrapped in Some, or None if the sequence is empty. +// +// Example: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 4, 5) +// product := heap.Iter().Reduce(func(a, b int) int { return a * b }) +// if product.IsSome() { +// fmt.Println(product.Some()) // 120 +// } else { +// fmt.Println("empty") +// } +func (seq SeqHeap[V]) Reduce(fn func(a, b V) V) Option[V] { + return OptionOf(iter.Reduce(iter.Seq[V](seq), fn)) +} + +// ForEach iterates through all elements and applies the given function to each. +// +// The function applies the provided function to each element of the iterator. +// +// Params: +// +// - fn (func(V)): The function to apply to each element. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 4, 5) +// heap.Iter().ForEach(func(val int) { +// fmt.Println(val) // Replace this with the function logic you need. +// }) +// +// The provided function will be applied to each element in the iterator. +func (seq SeqHeap[V]) ForEach(fn func(v V)) { iter.ForEach(iter.Seq[V](seq), fn) } + +// Flatten flattens an iterator of iterators into a single iterator. +// +// The function creates a new iterator that flattens a sequence of iterators, +// returning a single iterator containing elements from each iterator in sequence. +// +// Returns: +// +// - SeqHeap[V]: A single iterator containing elements from the sequence of iterators. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[any]) +// heap.Push( +// 1, +// g.SliceOf(2, 3), +// "abc", +// g.SliceOf("def", "ghi"), +// g.SliceOf(4.5, 6.7), +// ) +// +// heap.Iter().Flatten().ForEach(func(v any) { fmt.Print(v, " ") }) +// +// Output: 1 2 3 abc def ghi 4.5 6.7 +// +// The resulting iterator will contain elements from each iterator in sequence. +func (seq SeqHeap[V]) Flatten() SeqHeap[V] { + return func(yield func(V) bool) { + var flatten func(item any) bool + flatten = func(item any) bool { + rv := reflect.ValueOf(item) + switch rv.Kind() { + case reflect.Slice, reflect.Array: + for i := range rv.Len() { + if !flatten(rv.Index(i).Interface()) { + return false + } + } + default: + if v, ok := item.(V); ok { + if !yield(v) { + return false + } + } + } + return true + } + + seq(func(item V) bool { + return flatten(item) + }) + } +} + +// Inspect creates a new iterator that wraps around the current iterator +// and allows inspecting each element as it passes through. +func (seq SeqHeap[V]) Inspect(fn func(v V)) SeqHeap[V] { + return SeqHeap[V](iter.Inspect(iter.Seq[V](seq), fn)) +} + +// Intersperse inserts the provided separator between elements of the iterator. +// +// The function creates a new iterator that inserts the given separator between each +// consecutive pair of elements in the original iterator. +// +// Params: +// +// - sep (V): The separator to intersperse between elements. +// +// Returns: +// +// - SeqHeap[V]: An iterator containing elements with the separator interspersed. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[string]) +// heap.Push("Hello", "World", "!") +// heap.Iter(). +// Intersperse(" "). +// ForEach(func(s string) { fmt.Print(s) }) +// +// Output: "! Hello World". +// +// The resulting iterator will contain elements with the separator interspersed. +func (seq SeqHeap[V]) Intersperse(sep V) SeqHeap[V] { + return SeqHeap[V](iter.Intersperse(iter.Seq[V](seq), sep)) +} + +// Map transforms each element in the iterator using the given function. +// +// The function creates a new iterator by applying the provided function to each element +// of the original iterator. +// +// Params: +// +// - fn (func(V) V): The function used to transform elements. +// +// Returns: +// +// - SeqHeap[V]: A iterator containing elements transformed by the provided function. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3) +// doubled := heap. +// Iter(). +// Map( +// func(val int) int { +// return val * 2 +// }). +// CollectWith(cmp.Cmp[int]) +// +// The resulting iterator will contain elements transformed by the provided function. +func (seq SeqHeap[V]) Map(transform func(V) V) SeqHeap[V] { + return SeqHeap[V](iter.Map(iter.Seq[V](seq), transform)) +} + +// Partition divides the elements of the iterator into two separate heaps with custom comparison functions. +func (seq SeqHeap[V]) Partition(fn func(v V) bool, leftCmp, rightCmp func(V, V) cmp.Ordering) (*Heap[V], *Heap[V]) { + left := NewHeap(leftCmp) + right := NewHeap(rightCmp) + + seq(func(v V) bool { + if fn(v) { + left.Push(v) + } else { + right.Push(v) + } + return true + }) + + return left, right +} + +// Permutations generates iterators of all permutations of elements. +// +// The function uses a recursive approach to generate all the permutations of the elements. +// If the iterator is empty or contains a single element, it returns the iterator itself +// wrapped in a single-element iterator. +// +// Returns: +// +// - SeqSlices[V]: An iterator of iterators containing all possible permutations of the +// elements in the iterator. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3) +// perms := heap.Iter().Permutations().Collect() +// for _, perm := range perms { +// fmt.Println(perm) +// } +// +// Output: +// Slice[1, 2, 3] +// Slice[2, 1, 3] +// Slice[3, 1, 2] +// Slice[1, 3, 2] +// Slice[2, 3, 1] +// Slice[3, 2, 1] +// +// The resulting iterator will contain iterators representing all possible permutations +// of the elements in the original iterator. +func (seq SeqHeap[V]) Permutations() SeqSlices[V] { + return SeqSlices[V](iter.Permutations(iter.Seq[V](seq))) +} + +// Range iterates through elements until the given function returns false. +// +// The function iterates through the elements of the iterator and applies the provided function +// to each element. It stops iteration when the function returns false for an element. +// +// Params: +// +// - fn (func(V) bool): The function that evaluates elements for continuation of iteration. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 4, 5) +// heap.Iter().Range(func(val int) bool { +// fmt.Println(val) // Replace this with the function logic you need. +// return val < 5 // Replace this with the condition for continuing iteration. +// }) +// +// The iteration will stop when the provided function returns false for an element. +func (seq SeqHeap[V]) Range(fn func(v V) bool) { iter.Range(iter.Seq[V](seq), fn) } + +// Skip returns a new iterator skipping the first n elements. +// +// The function creates a new iterator that skips the first n elements of the current iterator +// and returns an iterator starting from the (n+1)th element. +// +// Params: +// +// - n (uint): The number of elements to skip from the beginning of the iterator. +// +// Returns: +// +// - SeqHeap[V]: An iterator that starts after skipping the first n elements. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 4, 5, 6) +// heap.Iter().Skip(3).ForEach(func(v int) { fmt.Print(v, " ") }) +// +// Output: 4 5 6 +// +// The resulting iterator will start after skipping the specified number of elements. +func (seq SeqHeap[V]) Skip(n uint) SeqHeap[V] { + return SeqHeap[V](iter.Skip(iter.Seq[V](seq), int(n))) +} + +// StepBy creates a new iterator that iterates over every N-th element of the original iterator. +// This function is useful when you want to skip a specific number of elements between each iteration. +// +// Parameters: +// - n uint: The step size, indicating how many elements to skip between each iteration. +// +// Returns: +// - SeqHeap[V]: A new iterator that produces elements from the original iterator with a step size of N. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 4, 5, 6, 7, 8, 9, 10) +// heap.Iter().StepBy(3).ForEach(func(v int) { fmt.Print(v, " ") }) +// +// Output: 1 4 7 10 +// +// The resulting iterator will produce elements from the original iterator with a step size of N. +func (seq SeqHeap[V]) StepBy(n uint) SeqHeap[V] { + return SeqHeap[V](iter.StepBy(iter.Seq[V](seq), int(n))) +} + +// SortBy applies a custom sorting function to the elements in the iterator +// and returns a new iterator containing the sorted elements. +// +// The sorting function 'fn' should take two arguments, 'a' and 'b' of type V, +// and return the ordering between them. +// +// Example: +// +// heap := g.NewHeap(cmp.Cmp[string]) +// heap.Push("a", "c", "b") +// heap.Iter(). +// SortBy(func(a, b string) cmp.Ordering { return cmp.Cmp(b, a) }). +// ForEach(func(s string) { fmt.Print(s, " ") }) +// +// Output: c b a +// +// The returned iterator is of type SeqHeap[V], which implements the iterator +// interface for further iteration over the sorted elements. +func (seq SeqHeap[V]) SortBy(fn func(a, b V) cmp.Ordering) SeqHeap[V] { + return SeqHeap[V](iter.SortBy(iter.Seq[V](seq), func(a, b V) bool { return fn(a, b) == cmp.Less })) +} + +// Take returns a new iterator with the first n elements. +// The function creates a new iterator containing the first n elements from the original iterator. +func (seq SeqHeap[V]) Take(n uint) SeqHeap[V] { + return SeqHeap[V](iter.Take(iter.Seq[V](seq), int(n))) +} + +// First returns the first element from the sequence. +func (seq SeqHeap[V]) First() Option[V] { + return OptionOf(iter.First(iter.Seq[V](seq))) +} + +// Last returns the last element from the sequence. +func (seq SeqHeap[V]) Last() Option[V] { + return OptionOf(iter.Last(iter.Seq[V](seq))) +} + +// Nth returns the nth element (0-indexed) in the sequence. +func (seq SeqHeap[V]) Nth(n Int) Option[V] { + return OptionOf(iter.Nth(iter.Seq[V](seq), int(n))) +} + +// ToChan converts the iterator into a channel, optionally with context(s). +// +// The function converts the elements of the iterator into a channel for streaming purposes. +// Optionally, it accepts context(s) to handle cancellation or timeout scenarios. +// +// Params: +// +// - ctxs (context.Context): Optional context(s) to control the channel behavior (e.g., cancellation). +// +// Returns: +// +// - chan V: A channel containing the elements from the iterator. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3) +// ctx, cancel := context.WithCancel(context.Background()) +// defer cancel() // Ensure cancellation to avoid goroutine leaks. +// ch := heap.Iter().ToChan(ctx) +// for val := range ch { +// fmt.Println(val) +// } +// +// The resulting channel allows streaming elements from the iterator with optional context handling. +func (seq SeqHeap[V]) ToChan(ctxs ...context.Context) chan V { + ctx := context.Background() + if len(ctxs) > 0 { + ctx = ctxs[0] + } + + return iter.ToChan(iter.Seq[V](seq), ctx) +} + +// Unique returns an iterator with only unique elements. +// +// The function returns an iterator containing only the unique elements from the original iterator. +// +// Returns: +// +// - SeqHeap[V]: An iterator containing unique elements from the original iterator. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 2, 4, 5, 3) +// heap.Iter().Unique().ForEach(func(v int) { fmt.Print(v, " ") }) +// +// Output: 1 2 3 4 5 +// +// The resulting iterator will contain only unique elements from the original iterator. +func (seq SeqHeap[V]) Unique() SeqHeap[V] { + return SeqHeap[V](iter.Unique(iter.Seq[V](seq))) +} + +// Zip combines elements from the current sequence and another sequence into pairs, +// creating an ordered map with identical keys and values of type V. +func (seq SeqHeap[V]) Zip(two SeqHeap[V]) SeqMapOrd[any, any] { + return func(yield func(any, any) bool) { + zipSeq := iter.Zip(iter.Seq[V](seq), iter.Seq[V](two)) + zipSeq(func(a, b V) bool { + return yield(a, b) + }) + } +} + +// Find searches for an element in the iterator that satisfies the provided function. +// +// The function iterates through the elements of the iterator and returns the first element +// for which the provided function returns true. +// +// Params: +// +// - fn (func(V) bool): The function used to test elements for a condition. +// +// Returns: +// +// - Option[V]: An Option containing the first element that satisfies the condition; None if not found. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 4, 5) +// found := heap.Iter().Find( +// func(i int) bool { +// return i == 2 +// }) +// +// if found.IsSome() { +// fmt.Println("Found:", found.Some()) +// } else { +// fmt.Println("Not found.") +// } +// +// The resulting Option may contain the first element that satisfies the condition, or None if not found. +func (seq SeqHeap[V]) Find(fn func(v V) bool) Option[V] { + return OptionOf(iter.Find(iter.Seq[V](seq), fn)) +} + +// Windows returns an iterator that yields sliding windows of elements of the specified size. +// +// The function creates a new iterator that yields windows of elements from the original iterator, +// where each window is a slice containing elements of the specified size and moves one element at a time. +// +// Params: +// +// - n (int): The size of each window. +// +// Returns: +// +// - SeqSlices[V]: An iterator yielding sliding windows of elements of the specified size. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 4, 5, 6) +// windows := heap.Iter().Windows(3).Collect() +// +// Output: [Slice[1, 2, 3] Slice[2, 3, 4] Slice[3, 4, 5] Slice[4, 5, 6]] +// +// The resulting iterator will yield sliding windows of elements, each containing the specified number of elements. +func (seq SeqHeap[V]) Windows(n Int) SeqSlices[V] { + return SeqSlices[V](iter.Windows(iter.Seq[V](seq), int(n))) +} + +// Context allows the iteration to be controlled with a context.Context. +func (seq SeqHeap[V]) Context(ctx context.Context) SeqHeap[V] { + return SeqHeap[V](iter.Context(iter.Seq[V](seq), ctx)) +} + +// MaxBy returns the maximum element in the sequence using the provided comparison function. +func (seq SeqHeap[V]) MaxBy(fn func(V, V) cmp.Ordering) Option[V] { + return OptionOf(iter.MaxBy(iter.Seq[V](seq), func(a, b V) bool { return fn(a, b) == cmp.Less })) +} + +// MinBy returns the minimum element in the sequence using the provided comparison function. +func (seq SeqHeap[V]) MinBy(fn func(V, V) cmp.Ordering) Option[V] { + return OptionOf(iter.MinBy(iter.Seq[V](seq), func(a, b V) bool { return fn(a, b) == cmp.Less })) +} + +// Eq checks whether two heap sequences are equal. +func (seq SeqHeap[T]) Eq(other SeqHeap[T]) bool { + return iter.Equal(iter.Seq[T](seq), iter.Seq[T](other)) +} + +// FlatMap applies a function to each element and flattens the results into a single sequence. +// +// The function transforms each element into a new SeqHeap and then flattens all resulting +// sequences into a single sequence. +// +// Params: +// +// - fn (func(V) SeqHeap[V]): The function that transforms each element into a SeqHeap. +// +// Returns: +// +// - SeqHeap[V]: A flattened sequence containing all elements from the transformed sequences. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3) +// result := heap.Iter().FlatMap(func(n int) g.SeqHeap[int] { +// subHeap := g.NewHeap(cmp.Cmp[int]) +// subHeap.Push(n, n*10) +// return subHeap.Iter() +// }).CollectWith(cmp.Cmp[int]) +// // result contains: 1, 10, 2, 20, 3, 30 (order depends on heap implementation) +func (seq SeqHeap[V]) FlatMap(fn func(V) SeqHeap[V]) SeqHeap[V] { + mapped := iter.MapTo(iter.Seq[V](seq), func(v V) iter.Seq[V] { + return iter.Seq[V](fn(v)) + }) + return SeqHeap[V](iter.FlattenSeq(mapped)) +} + +// FilterMap applies a function to each element and filters out None results. +// +// The function transforms and filters elements in a single pass. Elements where the function +// returns None are filtered out, and elements where it returns Some are unwrapped +// and included in the result. +// +// Params: +// +// - fn (func(V) Option[V]): The function that transforms and filters elements. +// Returns Some(value) to include the transformed element, or None to filter it out. +// +// Returns: +// +// - SeqHeap[V]: A sequence containing only the successfully transformed elements. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 4, 5) +// result := heap.Iter().FilterMap(func(n int) g.Option[int] { +// if n%2 == 0 { +// return g.Some(n * 10) +// } +// return g.None[int]() +// }).CollectWith(cmp.Cmp[int]) +// // result contains only even numbers multiplied by 10 +func (seq SeqHeap[V]) FilterMap(fn func(V) Option[V]) SeqHeap[V] { + return SeqHeap[V](iter.FilterMap(iter.Seq[V](seq), func(v V) (V, bool) { + return fn(v).Option() + })) +} + +// Scan applies a function to each element and produces a sequence of successive accumulated results. +// +// The function takes an initial value and applies the provided function to each element along +// with the accumulated value, producing a new sequence where each element is the result of +// the accumulation. The initial value is included as the first element. +// +// Params: +// +// - init (V): The initial value for the accumulation. +// - fn (func(acc, val V) V): The function that combines the accumulator with each element. +// +// Returns: +// +// - SeqHeap[V]: A sequence containing the initial value and all accumulated results. +// +// Example usage: +// +// heap := g.NewHeap(cmp.Cmp[int]) +// heap.Push(1, 2, 3, 4, 5) +// result := heap.Iter().Scan(0, func(acc, val int) int { +// return acc + val +// }).CollectWith(cmp.Cmp[int]) +// // result contains: 0, plus cumulative sums of heap elements +func (seq SeqHeap[V]) Scan(init V, fn func(acc, val V) V) SeqHeap[V] { + return func(yield func(V) bool) { + if !yield(init) { + return + } + iter.Scan(iter.Seq[V](seq), init, fn)(yield) + } +} + +// Next extracts the next element from the iterator and advances it. +// +// This method consumes the next element from the iterator and returns it wrapped in an Option. +// The iterator itself is modified to point to the remaining elements. +// +// Returns: +// - Option[V]: Some(value) if an element exists, None if the iterator is exhausted. +func (seq *SeqHeap[V]) Next() Option[V] { + if value, remaining, ok := iter.Next(iter.Seq[V](*seq)); ok { + *seq = SeqHeap[V](remaining) + return Some(value) + } + + return None[V]() +} diff --git a/backend/vendor/github.com/enetx/g/heap_iter_par.go b/backend/vendor/github.com/enetx/g/heap_iter_par.go new file mode 100644 index 0000000..4e498cd --- /dev/null +++ b/backend/vendor/github.com/enetx/g/heap_iter_par.go @@ -0,0 +1,672 @@ +package g + +import ( + "reflect" + "sync" + "sync/atomic" + + "github.com/enetx/g/cmp" +) + +// All returns true only if fn returns true for every element. +// It stops early on the first false. +func (p SeqHeapPar[V]) All(fn func(V) bool) bool { + var ok atomic.Bool + ok.Store(true) + + p.Range(func(v V) bool { + if !fn(v) { + ok.Store(false) + return false + } + return true + }) + + return ok.Load() +} + +// Any returns true if fn returns true for any element. +// It stops early on the first true. +func (p SeqHeapPar[V]) Any(fn func(V) bool) bool { + var ok atomic.Bool + + p.Range(func(v V) bool { + if fn(v) { + ok.Store(true) + return false + } + return true + }) + + return ok.Load() +} + +// Chain concatenates this SeqHeapPar with others, preserving full parallelism. +// Each sequence runs with its own worker pool in parallel. +func (p SeqHeapPar[V]) Chain(others ...SeqHeapPar[V]) SeqHeapPar[V] { + return SeqHeapPar[V]{ + seq: func(yield func(V) bool) { + done := make(chan struct{}) + result := make(chan V, int(p.workers)*4) + + var ( + wg sync.WaitGroup + once sync.Once + ) + + runSequence := func(seq SeqHeapPar[V]) { + defer wg.Done() + seq.Range(func(v V) bool { + select { + case <-done: + return false + case result <- v: + return true + } + }) + } + + go func() { + defer close(result) + + wg.Add(1) + go runSequence(p) + + for _, o := range others { + wg.Add(1) + go runSequence(o) + } + + wg.Wait() + }() + + for { + select { + case <-done: + return + case v, ok := <-result: + if !ok { + return + } + if !yield(v) { + once.Do(func() { close(done) }) + return + } + } + } + }, + workers: p.workers, + process: func(v V) (V, bool) { return v, true }, + } +} + +// Collect gathers all processed elements into a Heap with a custom comparison function. +func (p SeqHeapPar[V]) Collect(compareFn func(V, V) cmp.Ordering) *Heap[V] { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- v + return true + }) + }() + + result := NewHeap(compareFn) + for v := range ch { + result.Push(v) + } + + return result +} + +// Count returns the total number of elements processed. +func (p SeqHeapPar[V]) Count() Int { + var count atomic.Int64 + p.Range(func(V) bool { + count.Add(1) + return true + }) + + return Int(count.Load()) +} + +// Exclude removes elements for which fn returns true, in parallel. +func (p SeqHeapPar[V]) Exclude(fn func(V) bool) SeqHeapPar[V] { + return p.Filter(func(v V) bool { return !fn(v) }) +} + +// Filter retains only elements where fn returns true. +func (p SeqHeapPar[V]) Filter(fn func(V) bool) SeqHeapPar[V] { + prev := p.process + + return SeqHeapPar[V]{ + seq: p.seq, + workers: p.workers, + process: func(v V) (V, bool) { + if mid, ok := prev(v); ok && fn(mid) { + return mid, true + } + var zero V + return zero, false + }, + } +} + +// FlatMap applies fn to each element in parallel, flattening the resulting sequences. +func (p SeqHeapPar[V]) FlatMap(fn func(V) SeqHeap[V]) SeqHeapPar[V] { + return SeqHeapPar[V]{ + seq: func(yield func(V) bool) { + done := make(chan struct{}) + result := make(chan V, 100) + + var ( + wg sync.WaitGroup + once sync.Once + ) + + go func() { + defer close(result) + + p.Range(func(v V) bool { + select { + case <-done: + return false + default: + } + + wg.Add(1) + go func(val V) { + defer wg.Done() + fn(val)(func(item V) bool { + select { + case <-done: + return false + case result <- item: + return true + } + }) + }(v) + + return true + }) + + wg.Wait() + }() + + for { + select { + case <-done: + return + case v, ok := <-result: + if !ok { + return + } + if !yield(v) { + once.Do(func() { close(done) }) + return + } + } + } + }, + workers: p.workers, + process: func(v V) (V, bool) { return v, true }, + } +} + +// FilterMap applies fn to each element in parallel, keeping only Some values. +func (p SeqHeapPar[V]) FilterMap(fn func(V) Option[V]) SeqHeapPar[V] { + prev := p.process + + return SeqHeapPar[V]{ + seq: p.seq, + workers: p.workers, + process: func(v V) (V, bool) { + if mid, ok := prev(v); ok { + if opt := fn(mid); opt.IsSome() { + return opt.Some(), true + } + } + var zero V + return zero, false + }, + } +} + +// StepBy yields every nth element. +func (p SeqHeapPar[V]) StepBy(n uint) SeqHeapPar[V] { + if n == 0 { + n = 1 + } + + prev := p.process + counter := &atomic.Uint64{} + + return SeqHeapPar[V]{ + seq: p.seq, + workers: p.workers, + process: func(v V) (V, bool) { + if mid, ok := prev(v); ok { + count := counter.Add(1) + if (count-1)%uint64(n) == 0 { + return mid, true + } + } + var zero V + return zero, false + }, + } +} + +// MaxBy returns the maximum element according to the comparison function. +func (p SeqHeapPar[V]) MaxBy(fn func(V, V) cmp.Ordering) Option[V] { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- v + return true + }) + }() + + var max V + hasMax := false + + for v := range ch { + if !hasMax { + max = v + hasMax = true + } else if fn(v, max).IsGt() { + max = v + } + } + + if hasMax { + return Some(max) + } + return None[V]() +} + +// MinBy returns the minimum element according to the comparison function. +func (p SeqHeapPar[V]) MinBy(fn func(V, V) cmp.Ordering) Option[V] { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- v + return true + }) + }() + + var min V + hasMin := false + + for v := range ch { + if !hasMin { + min = v + hasMin = true + } else if fn(v, min).IsLt() { + min = v + } + } + + if hasMin { + return Some(min) + } + return None[V]() +} + +// Find returns the first element satisfying fn, or None if no such element exists. +func (p SeqHeapPar[V]) Find(fn func(V) bool) Option[V] { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + if fn(v) { + ch <- v + return false + } + return true + }) + }() + + if v, ok := <-ch; ok { + return Some(v) + } + + return None[V]() +} + +// Fold reduces all elements into a single value, using fn to accumulate results. +// Note: This collects all processed elements first, then folds sequentially. +// The parallel processing happens during the Range phase. +func (p SeqHeapPar[V]) Fold(init V, fn func(acc, v V) V) V { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- v + return true + }) + }() + + acc := init + for v := range ch { + acc = fn(acc, v) + } + + return acc +} + +// Flatten unpacks nested slices or arrays in the source, returning a flat parallel sequence. +func (p SeqHeapPar[V]) Flatten() SeqHeapPar[V] { + seq := func(yield func(V) bool) { + var recurse func(any) bool + + recurse = func(item any) bool { + if item == nil { + return true + } + + rv := reflect.ValueOf(item) + + if !rv.IsValid() { + return true + } + + switch rv.Kind() { + case reflect.Slice, reflect.Array: + if rv.IsNil() { + return true + } + + for i := range rv.Len() { + elem := rv.Index(i) + + if !elem.CanInterface() { + continue + } + + if !recurse(elem.Interface()) { + return false + } + } + default: + if v, ok := item.(V); ok { + if !yield(v) { + return false + } + } + } + return true + } + + resultsChan := make(chan V, 100) + doneChan := make(chan struct{}) + var once sync.Once + + go func() { + defer close(resultsChan) + + p.Range(func(v V) bool { + select { + case <-doneChan: + return false + default: + } + + flattenedItems := flattenToSlice(v) + for _, item := range flattenedItems { + if flatItem, ok := item.(V); ok { + select { + case resultsChan <- flatItem: + case <-doneChan: + return false + } + } + } + return true + }) + }() + + for { + select { + case v, ok := <-resultsChan: + if !ok { + return + } + if !yield(v) { + once.Do(func() { close(doneChan) }) + return + } + case <-doneChan: + return + } + } + } + + return SeqHeapPar[V]{ + seq: seq, + workers: p.workers, + process: func(v V) (V, bool) { return v, true }, + } +} + +// Reduce aggregates elements of the parallel sequence using the provided function. +// The first received element is used as the initial accumulator. +// If the sequence is empty, returns None[V]. +// Note: This collects all processed elements first, then reduces sequentially. +// The parallel processing happens during the Range phase. +func (p SeqHeapPar[V]) Reduce(fn func(a, b V) V) Option[V] { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- v + return true + }) + }() + + var ( + acc V + first = true + ) + + for v := range ch { + if first { + acc = v + first = false + continue + } + + acc = fn(acc, v) + } + + if first { + return None[V]() + } + + return Some(acc) +} + +// ForEach applies fn to each element without early exit. +func (p SeqHeapPar[V]) ForEach(fn func(V)) { + p.Range(func(v V) bool { + fn(v) + return true + }) +} + +// Inspect invokes fn on each element without altering the resulting sequence. +func (p SeqHeapPar[V]) Inspect(fn func(V)) SeqHeapPar[V] { + prev := p.process + + return SeqHeapPar[V]{ + seq: p.seq, + workers: p.workers, + process: func(x V) (V, bool) { + if mid, ok := prev(x); ok { + fn(mid) + return mid, true + } + var zero V + return zero, false + }, + } +} + +// Map applies fn to each element. +func (p SeqHeapPar[V]) Map(fn func(V) V) SeqHeapPar[V] { + prev := p.process + + return SeqHeapPar[V]{ + seq: p.seq, + workers: p.workers, + process: func(v V) (V, bool) { + if mid, ok := prev(v); ok { + return fn(mid), true + } + var zero V + return zero, false + }, + } +} + +// Partition partitions elements using custom comparison functions for each heap. +func (p SeqHeapPar[V]) Partition(fn func(V) bool, leftCmp, rightCmp func(V, V) cmp.Ordering) (*Heap[V], *Heap[V]) { + type item struct { + value V + isLeft bool + } + + ch := make(chan item) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- item{ + value: v, + isLeft: fn(v), + } + return true + }) + }() + + left := NewHeap(leftCmp) + right := NewHeap(rightCmp) + + for it := range ch { + if it.isLeft { + left.Push(it.value) + } else { + right.Push(it.value) + } + } + + return left, right +} + +// Range applies fn to each processed element in parallel, stopping on false. +func (p SeqHeapPar[V]) Range(fn func(V) bool) { + in := make(chan V) + done := make(chan struct{}) + + var ( + wg sync.WaitGroup + once sync.Once + ) + + go func() { + defer close(in) + p.seq(func(v V) bool { + select { + case <-done: + return false + case in <- v: + return true + } + }) + }() + + wg.Add(int(p.workers)) + for range p.workers { + go func() { + defer wg.Done() + for v := range in { + if mid, ok := p.process(v); ok { + if !fn(mid) { + once.Do(func() { close(done) }) + return + } + } + } + }() + } + + wg.Wait() +} + +func (p SeqHeapPar[V]) Skip(n uint) SeqHeapPar[V] { + prev := p.process + + return SeqHeapPar[V]{ + seq: func(yield func(V) bool) { + var cnt uint64 + p.seq(func(v V) bool { + if atomic.AddUint64(&cnt, 1) > uint64(n) { + return yield(v) + } + return true + }) + }, + workers: p.workers, + process: prev, + } +} + +func (p SeqHeapPar[V]) Take(n uint) SeqHeapPar[V] { + prev := p.process + + return SeqHeapPar[V]{ + seq: func(yield func(V) bool) { + var cnt uint64 + p.seq(func(v V) bool { + if atomic.AddUint64(&cnt, 1) <= uint64(n) { + return yield(v) + } + return false + }) + }, + workers: p.workers, + process: prev, + } +} + +// Unique removes duplicate elements, preserving the first occurrence. +func (p SeqHeapPar[V]) Unique() SeqHeapPar[V] { + prev := p.process + seen := NewMapSafe[any, struct{}]() + + return SeqHeapPar[V]{ + seq: p.seq, + workers: p.workers, + process: func(v V) (V, bool) { + if mid, ok := prev(v); ok { + if loaded := seen.Entry(mid).OrSet(struct{}{}); loaded.IsSome() { + var zero V + return zero, false + } + + return mid, true + } + + var zero V + return zero, false + }, + } +} diff --git a/backend/vendor/github.com/enetx/g/int.go b/backend/vendor/github.com/enetx/g/int.go new file mode 100644 index 0000000..c887ae3 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/int.go @@ -0,0 +1,229 @@ +package g + +import ( + "encoding/binary" + "fmt" + "math/big" + "strconv" + + "github.com/enetx/g/cmp" + "github.com/enetx/g/constraints" + "github.com/enetx/g/rand" +) + +// NewInt creates a new Int with the provided int value. +func NewInt[T constraints.Integer | rune | byte](i T) Int { return Int(i) } + +// Transform applies a transformation function to the Int and returns the result. +func (i Int) Transform(fn func(Int) Int) Int { return fn(i) } + +// Min returns the minimum of Ints. +func (i Int) Min(b ...Int) Int { return cmp.Min(append(b, i)...) } + +// Max returns the maximum of Ints. +func (i Int) Max(b ...Int) Int { return cmp.Max(append(b, i)...) } + +// RandomRange returns a random Int in the inclusive range [i, to]. +// The order of bounds does not matter (it normalizes to [min, max]). +// Works for negative bounds and the full int64 range without overflow or bias. +func (i Int) RandomRange(to Int) Int { + lo, hi := i, to + + if lo > hi { + lo, hi = hi, lo + } + + if lo == hi { + return lo + } + + const bias = uint64(1) << 63 // 2^63 = 9223372036854775808 + + ulo := uint64(lo) + bias + uhi := uint64(hi) + bias + + w := uhi - ulo + 1 + + if w == 0 { + return Int(int64(rand.U64())) + } + + randv := rand.N(w) + result := int64((ulo + randv) - bias) + + return Int(result) +} + +// Abs returns the absolute value of the Int. +func (i Int) Abs() Int { + if i < 0 { + return -i + } + + return i +} + +// Add adds two Ints and returns the result. +func (i Int) Add(b Int) Int { return i + b } + +// BigInt returns the Int as a *big.Int. +func (i Int) BigInt() *big.Int { return big.NewInt(i.Int64()) } + +// Div divides two Ints and returns the result. +func (i Int) Div(b Int) Int { return i / b } + +// Eq checks if two Ints are equal. +func (i Int) Eq(b Int) bool { return i == b } + +// Gt checks if the Int is greater than the specified Int. +func (i Int) Gt(b Int) bool { return i > b } + +// Gte checks if the Int is greater than or equal to the specified Int. +func (i Int) Gte(b Int) bool { return i >= b } + +// Float returns the Int as an Float. +func (i Int) Float() Float { return Float(i) } + +// String returns the Int as an String. +func (i Int) String() String { return String(strconv.FormatInt(int64(i), 10)) } + +// Std returns the Int as an int. +func (i Int) Std() int { return int(i) } + +// Cmp compares two Ints and returns an cmp.Ordering. +func (i Int) Cmp(b Int) cmp.Ordering { return cmp.Cmp(i, b) } + +// Int16 returns the Int as an int16. +func (i Int) Int16() int16 { return int16(i) } + +// Int32 returns the Int as an int32. +func (i Int) Int32() int32 { return int32(i) } + +// Int64 returns the Int as an int64. +func (i Int) Int64() int64 { return int64(i) } + +// Int8 returns the Int as an int8. +func (i Int) Int8() int8 { return int8(i) } + +// IsZero checks if the Int is 0. +func (i Int) IsZero() bool { return i == 0 } + +// IsNegative checks if the Int is negative. +func (i Int) IsNegative() bool { return i < 0 } + +// IsPositive checks if the Int is positive. +func (i Int) IsPositive() bool { return i >= 0 } + +// Lt checks if the Int is less than the specified Int. +func (i Int) Lt(b Int) bool { return i < b } + +// Lte checks if the Int is less than or equal to the specified Int. +func (i Int) Lte(b Int) bool { return i <= b } + +// Mul multiplies two Ints and returns the result. +func (i Int) Mul(b Int) Int { return i * b } + +// Ne checks if two Ints are not equal. +func (i Int) Ne(b Int) bool { return i != b } + +// Random returns a random Int in the range [0, hi]. +func (i Int) Random() Int { + if i <= 0 { + return 0 + } + + return Int(rand.N(uint64(i))) +} + +// Rem returns the remainder of the division between the receiver and the input value. +func (i Int) Rem(b Int) Int { return i % b } + +// Sub subtracts two Ints and returns the result. +func (i Int) Sub(b Int) Int { return i - b } + +// Binary returns the Int as a binary string. +func (i Int) Binary() String { return String(fmt.Sprintf("%08b", i)) } + +// Hex returns the Int as a hexadecimal string. +func (i Int) Hex() String { return String(fmt.Sprintf("%x", i)) } + +// Octal returns the Int as an octal string. +func (i Int) Octal() String { return String(fmt.Sprintf("%o", i)) } + +// UInt returns the Int as a uint. +func (i Int) UInt() uint { return uint(i) } + +// UInt16 returns the Int as a uint16. +func (i Int) UInt16() uint16 { return uint16(i) } + +// UInt32 returns the Int as a uint32. +func (i Int) UInt32() uint32 { return uint32(i) } + +// UInt64 returns the Int as a uint64. +func (i Int) UInt64() uint64 { return uint64(i) } + +// UInt8 returns the Int as a uint8. +func (i Int) UInt8() uint8 { return uint8(i) } + +// bytesFromInt converts Int to Bytes using the given byte order. +// For BE: removes leading zeros while preserving the sign bit. +// For LE: removes trailing zeros while preserving the sign bit. +func bytesFromInt(i Int, order binary.ByteOrder) Bytes { + var buf [8]byte + order.PutUint64(buf[:], uint64(i)) + + switch order { + case binary.BigEndian: + start := 0 + for start < 7 && buf[start] == 0 { + start++ + } + + if i >= 0 && buf[start]&0x80 != 0 { + start-- + } + + if i < 0 && start > 0 && buf[start]&0x80 == 0 { + start-- + } + + return Bytes(buf[start:]) + case binary.LittleEndian: + end := 8 + for end > 1 && buf[end-1] == 0 { + end-- + } + + if i >= 0 && buf[end-1]&0x80 != 0 { + end++ + } + + if i < 0 && end < 8 && buf[end-1]&0x80 == 0 { + end++ + } + + return Bytes(buf[:end]) + } + + return Bytes(buf[:]) +} + +// BytesBE converts the Int to Bytes in BigEndian order. +// Leading zero bytes are removed while preserving the sign bit for negative numbers. +func (i Int) BytesBE() Bytes { + return bytesFromInt(i, binary.BigEndian) +} + +// BytesLE converts the Int to Bytes in LittleEndian order. +// Trailing zero bytes are removed while preserving the sign bit for negative numbers +func (i Int) BytesLE() Bytes { + return bytesFromInt(i, binary.LittleEndian) +} + +// Print writes the value of the Int to the standard output (console) +// and returns the Int unchanged. +func (i Int) Print() Int { fmt.Print(i); return i } + +// Println writes the value of the Int to the standard output (console) with a newline +// and returns the Int unchanged. +func (i Int) Println() Int { fmt.Println(i); return i } diff --git a/backend/vendor/github.com/enetx/g/internal/filelock/filelock.go b/backend/vendor/github.com/enetx/g/internal/filelock/filelock.go new file mode 100644 index 0000000..d373318 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/internal/filelock/filelock.go @@ -0,0 +1,83 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package filelock provides a platform-independent API for advisory file +// locking. Calls to functions in this package on platforms that do not support +// advisory locks will return errors for which IsNotSupported returns true. +package filelock + +import ( + "errors" + "io/fs" +) + +// A File provides the minimal set of methods required to lock an open file. +// File implementations must be usable as map keys. +// The usual implementation is *os.File. +type File interface { + // Name returns the name of the file. + Name() string + + // Fd returns a valid file descriptor. + // (If the File is an *os.File, it must not be closed.) + Fd() uintptr + + // Stat returns the FileInfo structure describing file. + Stat() (fs.FileInfo, error) +} + +// Lock places an advisory write lock on the file, blocking until it can be +// locked. +// +// If Lock returns nil, no other process will be able to place a read or write +// lock on the file until this process exits, closes f, or calls Unlock on it. +// +// If f's descriptor is already read- or write-locked, the behavior of Lock is +// unspecified. +// +// Closing the file may or may not release the lock promptly. Callers should +// ensure that Unlock is always called when Lock succeeds. +func Lock(f File) error { + return lock(f, writeLock) +} + +// RLock places an advisory read lock on the file, blocking until it can be locked. +// +// If RLock returns nil, no other process will be able to place a write lock on +// the file until this process exits, closes f, or calls Unlock on it. +// +// If f is already read- or write-locked, the behavior of RLock is unspecified. +// +// Closing the file may or may not release the lock promptly. Callers should +// ensure that Unlock is always called if RLock succeeds. +func RLock(f File) error { + return lock(f, readLock) +} + +// Unlock removes an advisory lock placed on f by this process. +// +// The caller must not attempt to unlock a file that is not locked. +func Unlock(f File) error { + return unlock(f) +} + +// String returns the name of the function corresponding to lt +// (Lock, RLock, or Unlock). +func (lt lockType) String() string { + switch lt { + case readLock: + return "RLock" + case writeLock: + return "Lock" + default: + return "Unlock" + } +} + +// IsNotSupported returns a boolean indicating whether the error is known to +// report that a function is not supported (possibly for a specific input). +// It is satisfied by errors.ErrUnsupported as well as some syscall errors. +func IsNotSupported(err error) bool { + return errors.Is(err, errors.ErrUnsupported) +} diff --git a/backend/vendor/github.com/enetx/g/internal/filelock/filelock_fcntl.go b/backend/vendor/github.com/enetx/g/internal/filelock/filelock_fcntl.go new file mode 100644 index 0000000..8a62839 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/internal/filelock/filelock_fcntl.go @@ -0,0 +1,210 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build aix || (solaris && !illumos) + +// This code implements the filelock API using POSIX 'fcntl' locks, which attach +// to an (inode, process) pair rather than a file descriptor. To avoid unlocking +// files prematurely when the same file is opened through different descriptors, +// we allow only one read-lock at a time. +// +// Most platforms provide some alternative API, such as an 'flock' system call +// or an F_OFD_SETLK command for 'fcntl', that allows for better concurrency and +// does not require per-inode bookkeeping in the application. + +package filelock + +import ( + "errors" + "io" + "io/fs" + "math/rand" + "sync" + "syscall" + "time" +) + +type lockType int16 + +const ( + readLock lockType = syscall.F_RDLCK + writeLock lockType = syscall.F_WRLCK +) + +type inode = uint64 // type of syscall.Stat_t.Ino + +type inodeLock struct { + owner File + queue []<-chan File +} + +var ( + mu sync.Mutex + inodes = map[File]inode{} + locks = map[inode]inodeLock{} +) + +func lock(f File, lt lockType) (err error) { + // POSIX locks apply per inode and process, and the lock for an inode is + // released when *any* descriptor for that inode is closed. So we need to + // synchronize access to each inode internally, and must serialize lock and + // unlock calls that refer to the same inode through different descriptors. + fi, err := f.Stat() + if err != nil { + return err + } + ino := fi.Sys().(*syscall.Stat_t).Ino + + mu.Lock() + if i, dup := inodes[f]; dup && i != ino { + mu.Unlock() + return &fs.PathError{ + Op: lt.String(), + Path: f.Name(), + Err: errors.New("inode for file changed since last Lock or RLock"), + } + } + inodes[f] = ino + + var wait chan File + l := locks[ino] + if l.owner == f { + // This file already owns the lock, but the call may change its lock type. + } else if l.owner == nil { + // No owner: it's ours now. + l.owner = f + } else { + // Already owned: add a channel to wait on. + wait = make(chan File) + l.queue = append(l.queue, wait) + } + locks[ino] = l + mu.Unlock() + + if wait != nil { + wait <- f + } + + // Spurious EDEADLK errors arise on platforms that compute deadlock graphs at + // the process, rather than thread, level. Consider processes P and Q, with + // threads P.1, P.2, and Q.3. The following trace is NOT a deadlock, but will be + // reported as a deadlock on systems that consider only process granularity: + // + // P.1 locks file A. + // Q.3 locks file B. + // Q.3 blocks on file A. + // P.2 blocks on file B. (This is erroneously reported as a deadlock.) + // P.1 unlocks file A. + // Q.3 unblocks and locks file A. + // Q.3 unlocks files A and B. + // P.2 unblocks and locks file B. + // P.2 unlocks file B. + // + // These spurious errors were observed in practice on AIX and Solaris in + // cmd/go: see https://golang.org/issue/32817. + // + // We work around this bug by treating EDEADLK as always spurious. If there + // really is a lock-ordering bug between the interacting processes, it will + // become a livelock instead, but that's not appreciably worse than if we had + // a proper flock implementation (which generally does not even attempt to + // diagnose deadlocks). + // + // In the above example, that changes the trace to: + // + // P.1 locks file A. + // Q.3 locks file B. + // Q.3 blocks on file A. + // P.2 spuriously fails to lock file B and goes to sleep. + // P.1 unlocks file A. + // Q.3 unblocks and locks file A. + // Q.3 unlocks files A and B. + // P.2 wakes up and locks file B. + // P.2 unlocks file B. + // + // We know that the retry loop will not introduce a *spurious* livelock + // because, according to the POSIX specification, EDEADLK is only to be + // returned when “the lock is blocked by a lock from another process”. + // If that process is blocked on some lock that we are holding, then the + // resulting livelock is due to a real deadlock (and would manifest as such + // when using, for example, the flock implementation of this package). + // If the other process is *not* blocked on some other lock that we are + // holding, then it will eventually release the requested lock. + + nextSleep := 1 * time.Millisecond + const maxSleep = 500 * time.Millisecond + for { + err = setlkw(f.Fd(), lt) + if err != syscall.EDEADLK { + break + } + time.Sleep(nextSleep) + + nextSleep += nextSleep + if nextSleep > maxSleep { + nextSleep = maxSleep + } + // Apply 10% jitter to avoid synchronizing collisions when we finally unblock. + nextSleep += time.Duration((0.1*rand.Float64() - 0.05) * float64(nextSleep)) + } + + if err != nil { + unlock(f) + return &fs.PathError{ + Op: lt.String(), + Path: f.Name(), + Err: err, + } + } + + return nil +} + +func unlock(f File) error { + var owner File + + mu.Lock() + ino, ok := inodes[f] + if ok { + owner = locks[ino].owner + } + mu.Unlock() + + if owner != f { + panic("unlock called on a file that is not locked") + } + + err := setlkw(f.Fd(), syscall.F_UNLCK) + + mu.Lock() + l := locks[ino] + if len(l.queue) == 0 { + // No waiters: remove the map entry. + delete(locks, ino) + } else { + // The first waiter is sending us their file now. + // Receive it and update the queue. + l.owner = <-l.queue[0] + l.queue = l.queue[1:] + locks[ino] = l + } + delete(inodes, f) + mu.Unlock() + + return err +} + +// setlkw calls FcntlFlock with F_SETLKW for the entire file indicated by fd. +func setlkw(fd uintptr, lt lockType) error { + for { + err := syscall.FcntlFlock(fd, syscall.F_SETLKW, &syscall.Flock_t{ + Type: int16(lt), + Whence: io.SeekStart, + Start: 0, + Len: 0, // All bytes. + }) + if err != syscall.EINTR { + return err + } + } +} diff --git a/backend/vendor/github.com/enetx/g/internal/filelock/filelock_other.go b/backend/vendor/github.com/enetx/g/internal/filelock/filelock_other.go new file mode 100644 index 0000000..b16709e --- /dev/null +++ b/backend/vendor/github.com/enetx/g/internal/filelock/filelock_other.go @@ -0,0 +1,35 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build !unix && !windows + +package filelock + +import ( + "errors" + "io/fs" +) + +type lockType int8 + +const ( + readLock = iota + 1 + writeLock +) + +func lock(f File, lt lockType) error { + return &fs.PathError{ + Op: lt.String(), + Path: f.Name(), + Err: errors.ErrUnsupported, + } +} + +func unlock(f File) error { + return &fs.PathError{ + Op: "Unlock", + Path: f.Name(), + Err: errors.ErrUnsupported, + } +} diff --git a/backend/vendor/github.com/enetx/g/internal/filelock/filelock_unix.go b/backend/vendor/github.com/enetx/g/internal/filelock/filelock_unix.go new file mode 100644 index 0000000..6f73b1b --- /dev/null +++ b/backend/vendor/github.com/enetx/g/internal/filelock/filelock_unix.go @@ -0,0 +1,40 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build darwin || dragonfly || freebsd || illumos || linux || netbsd || openbsd + +package filelock + +import ( + "io/fs" + "syscall" +) + +type lockType int16 + +const ( + readLock lockType = syscall.LOCK_SH + writeLock lockType = syscall.LOCK_EX +) + +func lock(f File, lt lockType) (err error) { + for { + err = syscall.Flock(int(f.Fd()), int(lt)) + if err != syscall.EINTR { + break + } + } + if err != nil { + return &fs.PathError{ + Op: lt.String(), + Path: f.Name(), + Err: err, + } + } + return nil +} + +func unlock(f File) error { + return lock(f, syscall.LOCK_UN) +} diff --git a/backend/vendor/github.com/enetx/g/internal/filelock/filelock_windows.go b/backend/vendor/github.com/enetx/g/internal/filelock/filelock_windows.go new file mode 100644 index 0000000..ad5aa31 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/internal/filelock/filelock_windows.go @@ -0,0 +1,58 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build windows + +package filelock + +import ( + "io/fs" + "syscall" + + "github.com/enetx/g/internal/filelock/syscall/windows" +) + +type lockType uint32 + +const ( + readLock lockType = 0 + writeLock lockType = windows.LOCKFILE_EXCLUSIVE_LOCK +) + +const ( + reserved = 0 + allBytes = ^uint32(0) +) + +func lock(f File, lt lockType) error { + // Per https://golang.org/issue/19098, “Programs currently expect the Fd + // method to return a handle that uses ordinary synchronous I/O.” + // However, LockFileEx still requires an OVERLAPPED structure, + // which contains the file offset of the beginning of the lock range. + // We want to lock the entire file, so we leave the offset as zero. + ol := new(syscall.Overlapped) + + err := windows.LockFileEx(syscall.Handle(f.Fd()), uint32(lt), reserved, allBytes, allBytes, ol) + if err != nil { + return &fs.PathError{ + Op: lt.String(), + Path: f.Name(), + Err: err, + } + } + return nil +} + +func unlock(f File) error { + ol := new(syscall.Overlapped) + err := windows.UnlockFileEx(syscall.Handle(f.Fd()), reserved, allBytes, allBytes, ol) + if err != nil { + return &fs.PathError{ + Op: "Unlock", + Path: f.Name(), + Err: err, + } + } + return nil +} diff --git a/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/memory_windows.go b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/memory_windows.go new file mode 100644 index 0000000..8fb34cf --- /dev/null +++ b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/memory_windows.go @@ -0,0 +1,24 @@ +// Copyright 2017 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package windows + +type MemoryBasicInformation struct { + // A pointer to the base address of the region of pages. + BaseAddress uintptr + // A pointer to the base address of a range of pages allocated by the VirtualAlloc function. + // The page pointed to by the BaseAddress member is contained within this allocation range. + AllocationBase uintptr + // The memory protection option when the region was initially allocated + AllocationProtect uint32 + PartitionId uint16 + // The size of the region beginning at the base address in which all pages have identical attributes, in bytes. + RegionSize uintptr + // The state of the pages in the region. + State uint32 + // The access protection of the pages in the region. + Protect uint32 + // The type of pages in the region. + Type uint32 +} diff --git a/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/net_windows.go b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/net_windows.go new file mode 100644 index 0000000..3d3df71 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/net_windows.go @@ -0,0 +1,18 @@ +// Copyright 2021 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package windows + +import ( + "syscall" + _ "unsafe" +) + +//go:linkname WSASendtoInet4 syscall.wsaSendtoInet4 +//go:noescape +func WSASendtoInet4(s syscall.Handle, bufs *syscall.WSABuf, bufcnt uint32, sent *uint32, flags uint32, to *syscall.SockaddrInet4, overlapped *syscall.Overlapped, croutine *byte) (err error) + +//go:linkname WSASendtoInet6 syscall.wsaSendtoInet6 +//go:noescape +func WSASendtoInet6(s syscall.Handle, bufs *syscall.WSABuf, bufcnt uint32, sent *uint32, flags uint32, to *syscall.SockaddrInet6, overlapped *syscall.Overlapped, croutine *byte) (err error) diff --git a/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/psapi_windows.go b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/psapi_windows.go new file mode 100644 index 0000000..b138e65 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/psapi_windows.go @@ -0,0 +1,20 @@ +// Copyright 2017 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package windows + +type PROCESS_MEMORY_COUNTERS struct { + CB uint32 + PageFaultCount uint32 + PeakWorkingSetSize uintptr + WorkingSetSize uintptr + QuotaPeakPagedPoolUsage uintptr + QuotaPagedPoolUsage uintptr + QuotaPeakNonPagedPoolUsage uintptr + QuotaNonPagedPoolUsage uintptr + PagefileUsage uintptr + PeakPagefileUsage uintptr +} + +//sys GetProcessMemoryInfo(handle syscall.Handle, memCounters *PROCESS_MEMORY_COUNTERS, cb uint32) (err error) = psapi.GetProcessMemoryInfo diff --git a/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/reparse_windows.go b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/reparse_windows.go new file mode 100644 index 0000000..6e11139 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/reparse_windows.go @@ -0,0 +1,90 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package windows + +import ( + "syscall" + "unsafe" +) + +const ( + FSCTL_SET_REPARSE_POINT = 0x000900A4 + IO_REPARSE_TAG_MOUNT_POINT = 0xA0000003 + + SYMLINK_FLAG_RELATIVE = 1 +) + +// These structures are described +// in https://msdn.microsoft.com/en-us/library/cc232007.aspx +// and https://msdn.microsoft.com/en-us/library/cc232006.aspx. + +type REPARSE_DATA_BUFFER struct { + ReparseTag uint32 + ReparseDataLength uint16 + Reserved uint16 + DUMMYUNIONNAME byte +} + +// REPARSE_DATA_BUFFER_HEADER is a common part of REPARSE_DATA_BUFFER structure. +type REPARSE_DATA_BUFFER_HEADER struct { + ReparseTag uint32 + // The size, in bytes, of the reparse data that follows + // the common portion of the REPARSE_DATA_BUFFER element. + // This value is the length of the data starting at the + // SubstituteNameOffset field. + ReparseDataLength uint16 + Reserved uint16 +} + +type SymbolicLinkReparseBuffer struct { + // The integer that contains the offset, in bytes, + // of the substitute name string in the PathBuffer array, + // computed as an offset from byte 0 of PathBuffer. Note that + // this offset must be divided by 2 to get the array index. + SubstituteNameOffset uint16 + // The integer that contains the length, in bytes, of the + // substitute name string. If this string is null-terminated, + // SubstituteNameLength does not include the Unicode null character. + SubstituteNameLength uint16 + // PrintNameOffset is similar to SubstituteNameOffset. + PrintNameOffset uint16 + // PrintNameLength is similar to SubstituteNameLength. + PrintNameLength uint16 + // Flags specifies whether the substitute name is a full path name or + // a path name relative to the directory containing the symbolic link. + Flags uint32 + PathBuffer [1]uint16 +} + +// Path returns path stored in rb. +func (rb *SymbolicLinkReparseBuffer) Path() string { + n1 := rb.SubstituteNameOffset / 2 + n2 := (rb.SubstituteNameOffset + rb.SubstituteNameLength) / 2 + return syscall.UTF16ToString((*[0xffff]uint16)(unsafe.Pointer(&rb.PathBuffer[0]))[n1:n2:n2]) +} + +type MountPointReparseBuffer struct { + // The integer that contains the offset, in bytes, + // of the substitute name string in the PathBuffer array, + // computed as an offset from byte 0 of PathBuffer. Note that + // this offset must be divided by 2 to get the array index. + SubstituteNameOffset uint16 + // The integer that contains the length, in bytes, of the + // substitute name string. If this string is null-terminated, + // SubstituteNameLength does not include the Unicode null character. + SubstituteNameLength uint16 + // PrintNameOffset is similar to SubstituteNameOffset. + PrintNameOffset uint16 + // PrintNameLength is similar to SubstituteNameLength. + PrintNameLength uint16 + PathBuffer [1]uint16 +} + +// Path returns path stored in rb. +func (rb *MountPointReparseBuffer) Path() string { + n1 := rb.SubstituteNameOffset / 2 + n2 := (rb.SubstituteNameOffset + rb.SubstituteNameLength) / 2 + return syscall.UTF16ToString((*[0xffff]uint16)(unsafe.Pointer(&rb.PathBuffer[0]))[n1:n2:n2]) +} diff --git a/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/security_windows.go b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/security_windows.go new file mode 100644 index 0000000..4a2dfc0 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/security_windows.go @@ -0,0 +1,128 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package windows + +import ( + "syscall" + "unsafe" +) + +const ( + SecurityAnonymous = 0 + SecurityIdentification = 1 + SecurityImpersonation = 2 + SecurityDelegation = 3 +) + +//sys ImpersonateSelf(impersonationlevel uint32) (err error) = advapi32.ImpersonateSelf +//sys RevertToSelf() (err error) = advapi32.RevertToSelf + +const ( + TOKEN_ADJUST_PRIVILEGES = 0x0020 + SE_PRIVILEGE_ENABLED = 0x00000002 +) + +type LUID struct { + LowPart uint32 + HighPart int32 +} + +type LUID_AND_ATTRIBUTES struct { + Luid LUID + Attributes uint32 +} + +type TOKEN_PRIVILEGES struct { + PrivilegeCount uint32 + Privileges [1]LUID_AND_ATTRIBUTES +} + +//sys OpenThreadToken(h syscall.Handle, access uint32, openasself bool, token *syscall.Token) (err error) = advapi32.OpenThreadToken +//sys LookupPrivilegeValue(systemname *uint16, name *uint16, luid *LUID) (err error) = advapi32.LookupPrivilegeValueW +//sys adjustTokenPrivileges(token syscall.Token, disableAllPrivileges bool, newstate *TOKEN_PRIVILEGES, buflen uint32, prevstate *TOKEN_PRIVILEGES, returnlen *uint32) (ret uint32, err error) [true] = advapi32.AdjustTokenPrivileges + +func AdjustTokenPrivileges(token syscall.Token, disableAllPrivileges bool, newstate *TOKEN_PRIVILEGES, buflen uint32, prevstate *TOKEN_PRIVILEGES, returnlen *uint32) error { + ret, err := adjustTokenPrivileges(token, disableAllPrivileges, newstate, buflen, prevstate, returnlen) + if ret == 0 { + // AdjustTokenPrivileges call failed + return err + } + // AdjustTokenPrivileges call succeeded + if err == syscall.EINVAL { + // GetLastError returned ERROR_SUCCESS + return nil + } + return err +} + +//sys DuplicateTokenEx(hExistingToken syscall.Token, dwDesiredAccess uint32, lpTokenAttributes *syscall.SecurityAttributes, impersonationLevel uint32, tokenType TokenType, phNewToken *syscall.Token) (err error) = advapi32.DuplicateTokenEx +//sys SetTokenInformation(tokenHandle syscall.Token, tokenInformationClass uint32, tokenInformation uintptr, tokenInformationLength uint32) (err error) = advapi32.SetTokenInformation + +type SID_AND_ATTRIBUTES struct { + Sid *syscall.SID + Attributes uint32 +} + +type TOKEN_MANDATORY_LABEL struct { + Label SID_AND_ATTRIBUTES +} + +func (tml *TOKEN_MANDATORY_LABEL) Size() uint32 { + return uint32(unsafe.Sizeof(TOKEN_MANDATORY_LABEL{})) + syscall.GetLengthSid(tml.Label.Sid) +} + +const SE_GROUP_INTEGRITY = 0x00000020 + +type TokenType uint32 + +const ( + TokenPrimary TokenType = 1 + TokenImpersonation TokenType = 2 +) + +//sys GetProfilesDirectory(dir *uint16, dirLen *uint32) (err error) = userenv.GetProfilesDirectoryW + +const ( + LG_INCLUDE_INDIRECT = 0x1 + MAX_PREFERRED_LENGTH = 0xFFFFFFFF +) + +type LocalGroupUserInfo0 struct { + Name *uint16 +} + +type UserInfo4 struct { + Name *uint16 + Password *uint16 + PasswordAge uint32 + Priv uint32 + HomeDir *uint16 + Comment *uint16 + Flags uint32 + ScriptPath *uint16 + AuthFlags uint32 + FullName *uint16 + UsrComment *uint16 + Parms *uint16 + Workstations *uint16 + LastLogon uint32 + LastLogoff uint32 + AcctExpires uint32 + MaxStorage uint32 + UnitsPerWeek uint32 + LogonHours *byte + BadPwCount uint32 + NumLogons uint32 + LogonServer *uint16 + CountryCode uint32 + CodePage uint32 + UserSid *syscall.SID + PrimaryGroupID uint32 + Profile *uint16 + HomeDirDrive *uint16 + PasswordExpired uint32 +} + +//sys NetUserGetLocalGroups(serverName *uint16, userName *uint16, level uint32, flags uint32, buf **byte, prefMaxLen uint32, entriesRead *uint32, totalEntries *uint32) (neterr error) = netapi32.NetUserGetLocalGroups diff --git a/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/symlink_windows.go b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/symlink_windows.go new file mode 100644 index 0000000..b64d058 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/symlink_windows.go @@ -0,0 +1,39 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package windows + +import "syscall" + +const ( + ERROR_INVALID_PARAMETER syscall.Errno = 87 + + // symlink support for CreateSymbolicLink() starting with Windows 10 (1703, v10.0.14972) + SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE = 0x2 + + // FileInformationClass values + FileBasicInfo = 0 // FILE_BASIC_INFO + FileStandardInfo = 1 // FILE_STANDARD_INFO + FileNameInfo = 2 // FILE_NAME_INFO + FileStreamInfo = 7 // FILE_STREAM_INFO + FileCompressionInfo = 8 // FILE_COMPRESSION_INFO + FileAttributeTagInfo = 9 // FILE_ATTRIBUTE_TAG_INFO + FileIdBothDirectoryInfo = 0xa // FILE_ID_BOTH_DIR_INFO + FileIdBothDirectoryRestartInfo = 0xb // FILE_ID_BOTH_DIR_INFO + FileRemoteProtocolInfo = 0xd // FILE_REMOTE_PROTOCOL_INFO + FileFullDirectoryInfo = 0xe // FILE_FULL_DIR_INFO + FileFullDirectoryRestartInfo = 0xf // FILE_FULL_DIR_INFO + FileStorageInfo = 0x10 // FILE_STORAGE_INFO + FileAlignmentInfo = 0x11 // FILE_ALIGNMENT_INFO + FileIdInfo = 0x12 // FILE_ID_INFO + FileIdExtdDirectoryInfo = 0x13 // FILE_ID_EXTD_DIR_INFO + FileIdExtdDirectoryRestartInfo = 0x14 // FILE_ID_EXTD_DIR_INFO +) + +type FILE_ATTRIBUTE_TAG_INFO struct { + FileAttributes uint32 + ReparseTag uint32 +} + +//sys GetFileInformationByHandleEx(handle syscall.Handle, class uint32, info *byte, bufsize uint32) (err error) diff --git a/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/syscall_windows.go b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/syscall_windows.go new file mode 100644 index 0000000..8ace2a2 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/syscall_windows.go @@ -0,0 +1,369 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package windows + +import ( + "sync" + "syscall" + "unicode/utf16" + "unsafe" +) + +// UTF16PtrToString is like UTF16ToString, but takes *uint16 +// as a parameter instead of []uint16. +func UTF16PtrToString(p *uint16) string { + if p == nil { + return "" + } + // Find NUL terminator. + end := unsafe.Pointer(p) + n := 0 + for *(*uint16)(end) != 0 { + end = unsafe.Pointer(uintptr(end) + unsafe.Sizeof(*p)) + n++ + } + // Turn *uint16 into []uint16. + s := unsafe.Slice(p, n) + // Decode []uint16 into string. + return string(utf16.Decode(s)) +} + +const ( + ERROR_BAD_LENGTH syscall.Errno = 24 + ERROR_SHARING_VIOLATION syscall.Errno = 32 + ERROR_LOCK_VIOLATION syscall.Errno = 33 + ERROR_NOT_SUPPORTED syscall.Errno = 50 + ERROR_CALL_NOT_IMPLEMENTED syscall.Errno = 120 + ERROR_INVALID_NAME syscall.Errno = 123 + ERROR_LOCK_FAILED syscall.Errno = 167 + ERROR_NO_UNICODE_TRANSLATION syscall.Errno = 1113 +) + +const GAA_FLAG_INCLUDE_PREFIX = 0x00000010 + +const ( + IF_TYPE_OTHER = 1 + IF_TYPE_ETHERNET_CSMACD = 6 + IF_TYPE_ISO88025_TOKENRING = 9 + IF_TYPE_PPP = 23 + IF_TYPE_SOFTWARE_LOOPBACK = 24 + IF_TYPE_ATM = 37 + IF_TYPE_IEEE80211 = 71 + IF_TYPE_TUNNEL = 131 + IF_TYPE_IEEE1394 = 144 +) + +type SocketAddress struct { + Sockaddr *syscall.RawSockaddrAny + SockaddrLength int32 +} + +type IpAdapterUnicastAddress struct { + Length uint32 + Flags uint32 + Next *IpAdapterUnicastAddress + Address SocketAddress + PrefixOrigin int32 + SuffixOrigin int32 + DadState int32 + ValidLifetime uint32 + PreferredLifetime uint32 + LeaseLifetime uint32 + OnLinkPrefixLength uint8 +} + +type IpAdapterAnycastAddress struct { + Length uint32 + Flags uint32 + Next *IpAdapterAnycastAddress + Address SocketAddress +} + +type IpAdapterMulticastAddress struct { + Length uint32 + Flags uint32 + Next *IpAdapterMulticastAddress + Address SocketAddress +} + +type IpAdapterDnsServerAdapter struct { + Length uint32 + Reserved uint32 + Next *IpAdapterDnsServerAdapter + Address SocketAddress +} + +type IpAdapterPrefix struct { + Length uint32 + Flags uint32 + Next *IpAdapterPrefix + Address SocketAddress + PrefixLength uint32 +} + +type IpAdapterAddresses struct { + Length uint32 + IfIndex uint32 + Next *IpAdapterAddresses + AdapterName *byte + FirstUnicastAddress *IpAdapterUnicastAddress + FirstAnycastAddress *IpAdapterAnycastAddress + FirstMulticastAddress *IpAdapterMulticastAddress + FirstDnsServerAddress *IpAdapterDnsServerAdapter + DnsSuffix *uint16 + Description *uint16 + FriendlyName *uint16 + PhysicalAddress [syscall.MAX_ADAPTER_ADDRESS_LENGTH]byte + PhysicalAddressLength uint32 + Flags uint32 + Mtu uint32 + IfType uint32 + OperStatus uint32 + Ipv6IfIndex uint32 + ZoneIndices [16]uint32 + FirstPrefix *IpAdapterPrefix + /* more fields might be present here. */ +} + +type FILE_BASIC_INFO struct { + CreationTime syscall.Filetime + LastAccessTime syscall.Filetime + LastWriteTime syscall.Filetime + ChangedTime syscall.Filetime + FileAttributes uint32 +} + +const ( + IfOperStatusUp = 1 + IfOperStatusDown = 2 + IfOperStatusTesting = 3 + IfOperStatusUnknown = 4 + IfOperStatusDormant = 5 + IfOperStatusNotPresent = 6 + IfOperStatusLowerLayerDown = 7 +) + +//sys GetAdaptersAddresses(family uint32, flags uint32, reserved uintptr, adapterAddresses *IpAdapterAddresses, sizePointer *uint32) (errcode error) = iphlpapi.GetAdaptersAddresses +//sys GetComputerNameEx(nameformat uint32, buf *uint16, n *uint32) (err error) = GetComputerNameExW +//sys MoveFileEx(from *uint16, to *uint16, flags uint32) (err error) = MoveFileExW +//sys GetModuleFileName(module syscall.Handle, fn *uint16, len uint32) (n uint32, err error) = kernel32.GetModuleFileNameW +//sys SetFileInformationByHandle(handle syscall.Handle, fileInformationClass uint32, buf uintptr, bufsize uint32) (err error) = kernel32.SetFileInformationByHandle +//sys VirtualQuery(address uintptr, buffer *MemoryBasicInformation, length uintptr) (err error) = kernel32.VirtualQuery + +const ( + // flags for CreateToolhelp32Snapshot + TH32CS_SNAPMODULE = 0x08 + TH32CS_SNAPMODULE32 = 0x10 +) + +const MAX_MODULE_NAME32 = 255 + +type ModuleEntry32 struct { + Size uint32 + ModuleID uint32 + ProcessID uint32 + GlblcntUsage uint32 + ProccntUsage uint32 + ModBaseAddr uintptr + ModBaseSize uint32 + ModuleHandle syscall.Handle + Module [MAX_MODULE_NAME32 + 1]uint16 + ExePath [syscall.MAX_PATH]uint16 +} + +const SizeofModuleEntry32 = unsafe.Sizeof(ModuleEntry32{}) + +//sys Module32First(snapshot syscall.Handle, moduleEntry *ModuleEntry32) (err error) = kernel32.Module32FirstW +//sys Module32Next(snapshot syscall.Handle, moduleEntry *ModuleEntry32) (err error) = kernel32.Module32NextW + +const ( + WSA_FLAG_OVERLAPPED = 0x01 + WSA_FLAG_NO_HANDLE_INHERIT = 0x80 + + WSAEMSGSIZE syscall.Errno = 10040 + + MSG_PEEK = 0x2 + MSG_TRUNC = 0x0100 + MSG_CTRUNC = 0x0200 + + socket_error = uintptr(^uint32(0)) +) + +var WSAID_WSASENDMSG = syscall.GUID{ + Data1: 0xa441e712, + Data2: 0x754f, + Data3: 0x43ca, + Data4: [8]byte{0x84, 0xa7, 0x0d, 0xee, 0x44, 0xcf, 0x60, 0x6d}, +} + +var WSAID_WSARECVMSG = syscall.GUID{ + Data1: 0xf689d7c8, + Data2: 0x6f1f, + Data3: 0x436b, + Data4: [8]byte{0x8a, 0x53, 0xe5, 0x4f, 0xe3, 0x51, 0xc3, 0x22}, +} + +var sendRecvMsgFunc struct { + once sync.Once + sendAddr uintptr + recvAddr uintptr + err error +} + +type WSAMsg struct { + Name syscall.Pointer + Namelen int32 + Buffers *syscall.WSABuf + BufferCount uint32 + Control syscall.WSABuf + Flags uint32 +} + +//sys WSASocket(af int32, typ int32, protocol int32, protinfo *syscall.WSAProtocolInfo, group uint32, flags uint32) (handle syscall.Handle, err error) [failretval==syscall.InvalidHandle] = ws2_32.WSASocketW + +func loadWSASendRecvMsg() error { + sendRecvMsgFunc.once.Do(func() { + var s syscall.Handle + s, sendRecvMsgFunc.err = syscall.Socket(syscall.AF_INET, syscall.SOCK_DGRAM, syscall.IPPROTO_UDP) + if sendRecvMsgFunc.err != nil { + return + } + defer syscall.CloseHandle(s) + var n uint32 + sendRecvMsgFunc.err = syscall.WSAIoctl(s, + syscall.SIO_GET_EXTENSION_FUNCTION_POINTER, + (*byte)(unsafe.Pointer(&WSAID_WSARECVMSG)), + uint32(unsafe.Sizeof(WSAID_WSARECVMSG)), + (*byte)(unsafe.Pointer(&sendRecvMsgFunc.recvAddr)), + uint32(unsafe.Sizeof(sendRecvMsgFunc.recvAddr)), + &n, nil, 0) + if sendRecvMsgFunc.err != nil { + return + } + sendRecvMsgFunc.err = syscall.WSAIoctl(s, + syscall.SIO_GET_EXTENSION_FUNCTION_POINTER, + (*byte)(unsafe.Pointer(&WSAID_WSASENDMSG)), + uint32(unsafe.Sizeof(WSAID_WSASENDMSG)), + (*byte)(unsafe.Pointer(&sendRecvMsgFunc.sendAddr)), + uint32(unsafe.Sizeof(sendRecvMsgFunc.sendAddr)), + &n, nil, 0) + }) + return sendRecvMsgFunc.err +} + +func WSASendMsg(fd syscall.Handle, msg *WSAMsg, flags uint32, bytesSent *uint32, overlapped *syscall.Overlapped, croutine *byte) error { + err := loadWSASendRecvMsg() + if err != nil { + return err + } + r1, _, e1 := syscall.Syscall6(sendRecvMsgFunc.sendAddr, 6, uintptr(fd), uintptr(unsafe.Pointer(msg)), uintptr(flags), uintptr(unsafe.Pointer(bytesSent)), uintptr(unsafe.Pointer(overlapped)), uintptr(unsafe.Pointer(croutine))) + if r1 == socket_error { + if e1 != 0 { + err = errnoErr(e1) + } else { + err = syscall.EINVAL + } + } + return err +} + +func WSARecvMsg(fd syscall.Handle, msg *WSAMsg, bytesReceived *uint32, overlapped *syscall.Overlapped, croutine *byte) error { + err := loadWSASendRecvMsg() + if err != nil { + return err + } + r1, _, e1 := syscall.Syscall6(sendRecvMsgFunc.recvAddr, 5, uintptr(fd), uintptr(unsafe.Pointer(msg)), uintptr(unsafe.Pointer(bytesReceived)), uintptr(unsafe.Pointer(overlapped)), uintptr(unsafe.Pointer(croutine)), 0) + if r1 == socket_error { + if e1 != 0 { + err = errnoErr(e1) + } else { + err = syscall.EINVAL + } + } + return err +} + +const ( + ComputerNameNetBIOS = 0 + ComputerNameDnsHostname = 1 + ComputerNameDnsDomain = 2 + ComputerNameDnsFullyQualified = 3 + ComputerNamePhysicalNetBIOS = 4 + ComputerNamePhysicalDnsHostname = 5 + ComputerNamePhysicalDnsDomain = 6 + ComputerNamePhysicalDnsFullyQualified = 7 + ComputerNameMax = 8 + + MOVEFILE_REPLACE_EXISTING = 0x1 + MOVEFILE_COPY_ALLOWED = 0x2 + MOVEFILE_DELAY_UNTIL_REBOOT = 0x4 + MOVEFILE_WRITE_THROUGH = 0x8 + MOVEFILE_CREATE_HARDLINK = 0x10 + MOVEFILE_FAIL_IF_NOT_TRACKABLE = 0x20 +) + +func Rename(oldpath, newpath string) error { + from, err := syscall.UTF16PtrFromString(oldpath) + if err != nil { + return err + } + to, err := syscall.UTF16PtrFromString(newpath) + if err != nil { + return err + } + return MoveFileEx(from, to, MOVEFILE_REPLACE_EXISTING) +} + +//sys LockFileEx(file syscall.Handle, flags uint32, reserved uint32, bytesLow uint32, bytesHigh uint32, overlapped *syscall.Overlapped) (err error) = kernel32.LockFileEx +//sys UnlockFileEx(file syscall.Handle, reserved uint32, bytesLow uint32, bytesHigh uint32, overlapped *syscall.Overlapped) (err error) = kernel32.UnlockFileEx + +const ( + LOCKFILE_FAIL_IMMEDIATELY = 0x00000001 + LOCKFILE_EXCLUSIVE_LOCK = 0x00000002 +) + +const MB_ERR_INVALID_CHARS = 8 + +//sys GetACP() (acp uint32) = kernel32.GetACP +//sys GetConsoleCP() (ccp uint32) = kernel32.GetConsoleCP +//sys MultiByteToWideChar(codePage uint32, dwFlags uint32, str *byte, nstr int32, wchar *uint16, nwchar int32) (nwrite int32, err error) = kernel32.MultiByteToWideChar +//sys GetCurrentThread() (pseudoHandle syscall.Handle, err error) = kernel32.GetCurrentThread + +const STYPE_DISKTREE = 0x00 + +type SHARE_INFO_2 struct { + Netname *uint16 + Type uint32 + Remark *uint16 + Permissions uint32 + MaxUses uint32 + CurrentUses uint32 + Path *uint16 + Passwd *uint16 +} + +//sys NetShareAdd(serverName *uint16, level uint32, buf *byte, parmErr *uint16) (neterr error) = netapi32.NetShareAdd +//sys NetShareDel(serverName *uint16, netName *uint16, reserved uint32) (neterr error) = netapi32.NetShareDel + +const ( + FILE_NAME_NORMALIZED = 0x0 + FILE_NAME_OPENED = 0x8 + + VOLUME_NAME_DOS = 0x0 + VOLUME_NAME_GUID = 0x1 + VOLUME_NAME_NONE = 0x4 + VOLUME_NAME_NT = 0x2 +) + +//sys GetFinalPathNameByHandle(file syscall.Handle, filePath *uint16, filePathSize uint32, flags uint32) (n uint32, err error) = kernel32.GetFinalPathNameByHandleW + +func LoadGetFinalPathNameByHandle() error { + return procGetFinalPathNameByHandleW.Find() +} + +//sys CreateEnvironmentBlock(block **uint16, token syscall.Token, inheritExisting bool) (err error) = userenv.CreateEnvironmentBlock +//sys DestroyEnvironmentBlock(block *uint16) (err error) = userenv.DestroyEnvironmentBlock + +//sys RtlGenRandom(buf []byte) (err error) = advapi32.SystemFunction036 diff --git a/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/sysdll/sysdll.go b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/sysdll/sysdll.go new file mode 100644 index 0000000..e79fd19 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/sysdll/sysdll.go @@ -0,0 +1,30 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build windows + +// Package sysdll is an internal leaf package that records and reports +// which Windows DLL names are used by Go itself. These DLLs are then +// only loaded from the System32 directory. See Issue 14959. +package sysdll + +// IsSystemDLL reports whether the named dll key (a base name, like +// "foo.dll") is a system DLL which should only be loaded from the +// Windows SYSTEM32 directory. +// +// Filenames are case sensitive, but that doesn't matter because +// the case registered with Add is also the same case used with +// LoadDLL later. +// +// It has no associated mutex and should only be mutated serially +// (currently: during init), and not concurrent with DLL loading. +var IsSystemDLL = map[string]bool{} + +// Add notes that dll is a system32 DLL which should only be loaded +// from the Windows SYSTEM32 directory. It returns its argument back, +// for ease of use in generated code. +func Add(dll string) string { + IsSystemDLL[dll] = true + return dll +} diff --git a/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/zsyscall_windows.go b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/zsyscall_windows.go new file mode 100644 index 0000000..d731709 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/internal/filelock/syscall/windows/zsyscall_windows.go @@ -0,0 +1,619 @@ +package windows + +import ( + "syscall" + "unsafe" + + "github.com/enetx/g/internal/filelock/syscall/windows/sysdll" +) + +var _ unsafe.Pointer + +// Do the interface allocations only once for common +// Errno values. +const ( + errnoERROR_IO_PENDING = 997 +) + +var ( + errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING) + errERROR_EINVAL error = syscall.EINVAL +) + +// errnoErr returns common boxed Errno values, to prevent +// allocations at runtime. +func errnoErr(e syscall.Errno) error { + switch e { + case 0: + return errERROR_EINVAL + case errnoERROR_IO_PENDING: + return errERROR_IO_PENDING + } + // TODO: add more here, after collecting data on the common + // error values see on Windows. (perhaps when running + // all.bat?) + return e +} + +var ( + modadvapi32 = syscall.NewLazyDLL(sysdll.Add("advapi32.dll")) + modiphlpapi = syscall.NewLazyDLL(sysdll.Add("iphlpapi.dll")) + modkernel32 = syscall.NewLazyDLL(sysdll.Add("kernel32.dll")) + modnetapi32 = syscall.NewLazyDLL(sysdll.Add("netapi32.dll")) + modpsapi = syscall.NewLazyDLL(sysdll.Add("psapi.dll")) + moduserenv = syscall.NewLazyDLL(sysdll.Add("userenv.dll")) + modws2_32 = syscall.NewLazyDLL(sysdll.Add("ws2_32.dll")) + + procAdjustTokenPrivileges = modadvapi32.NewProc("AdjustTokenPrivileges") + procDuplicateTokenEx = modadvapi32.NewProc("DuplicateTokenEx") + procImpersonateSelf = modadvapi32.NewProc("ImpersonateSelf") + procLookupPrivilegeValueW = modadvapi32.NewProc("LookupPrivilegeValueW") + procOpenThreadToken = modadvapi32.NewProc("OpenThreadToken") + procRevertToSelf = modadvapi32.NewProc("RevertToSelf") + procSetTokenInformation = modadvapi32.NewProc("SetTokenInformation") + procSystemFunction036 = modadvapi32.NewProc("SystemFunction036") + procGetAdaptersAddresses = modiphlpapi.NewProc("GetAdaptersAddresses") + procGetACP = modkernel32.NewProc("GetACP") + procGetComputerNameExW = modkernel32.NewProc("GetComputerNameExW") + procGetConsoleCP = modkernel32.NewProc("GetConsoleCP") + procGetCurrentThread = modkernel32.NewProc("GetCurrentThread") + procGetFileInformationByHandleEx = modkernel32.NewProc("GetFileInformationByHandleEx") + procGetFinalPathNameByHandleW = modkernel32.NewProc("GetFinalPathNameByHandleW") + procGetModuleFileNameW = modkernel32.NewProc("GetModuleFileNameW") + procLockFileEx = modkernel32.NewProc("LockFileEx") + procModule32FirstW = modkernel32.NewProc("Module32FirstW") + procModule32NextW = modkernel32.NewProc("Module32NextW") + procMoveFileExW = modkernel32.NewProc("MoveFileExW") + procMultiByteToWideChar = modkernel32.NewProc("MultiByteToWideChar") + procSetFileInformationByHandle = modkernel32.NewProc("SetFileInformationByHandle") + procUnlockFileEx = modkernel32.NewProc("UnlockFileEx") + procVirtualQuery = modkernel32.NewProc("VirtualQuery") + procNetShareAdd = modnetapi32.NewProc("NetShareAdd") + procNetShareDel = modnetapi32.NewProc("NetShareDel") + procNetUserGetLocalGroups = modnetapi32.NewProc("NetUserGetLocalGroups") + procGetProcessMemoryInfo = modpsapi.NewProc("GetProcessMemoryInfo") + procCreateEnvironmentBlock = moduserenv.NewProc("CreateEnvironmentBlock") + procDestroyEnvironmentBlock = moduserenv.NewProc("DestroyEnvironmentBlock") + procGetProfilesDirectoryW = moduserenv.NewProc("GetProfilesDirectoryW") + procWSASocketW = modws2_32.NewProc("WSASocketW") +) + +func adjustTokenPrivileges( + token syscall.Token, + disableAllPrivileges bool, + newstate *TOKEN_PRIVILEGES, + buflen uint32, + prevstate *TOKEN_PRIVILEGES, + returnlen *uint32, +) (ret uint32, err error) { + var _p0 uint32 + if disableAllPrivileges { + _p0 = 1 + } + r0, _, e1 := syscall.Syscall6( + procAdjustTokenPrivileges.Addr(), + 6, + uintptr(token), + uintptr(_p0), + uintptr(unsafe.Pointer(newstate)), + uintptr(buflen), + uintptr(unsafe.Pointer(prevstate)), + uintptr(unsafe.Pointer(returnlen)), + ) + ret = uint32(r0) + if true { + err = errnoErr(e1) + } + return +} + +func DuplicateTokenEx( + hExistingToken syscall.Token, + dwDesiredAccess uint32, + lpTokenAttributes *syscall.SecurityAttributes, + impersonationLevel uint32, + tokenType TokenType, + phNewToken *syscall.Token, +) (err error) { + r1, _, e1 := syscall.Syscall6( + procDuplicateTokenEx.Addr(), + 6, + uintptr(hExistingToken), + uintptr(dwDesiredAccess), + uintptr(unsafe.Pointer(lpTokenAttributes)), + uintptr(impersonationLevel), + uintptr(tokenType), + uintptr(unsafe.Pointer(phNewToken)), + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func ImpersonateSelf(impersonationlevel uint32) (err error) { + r1, _, e1 := syscall.Syscall(procImpersonateSelf.Addr(), 1, uintptr(impersonationlevel), 0, 0) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func LookupPrivilegeValue(systemname, name *uint16, luid *LUID) (err error) { + r1, _, e1 := syscall.Syscall( + procLookupPrivilegeValueW.Addr(), + 3, + uintptr(unsafe.Pointer(systemname)), + uintptr(unsafe.Pointer(name)), + uintptr(unsafe.Pointer(luid)), + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func OpenThreadToken(h syscall.Handle, access uint32, openasself bool, token *syscall.Token) (err error) { + var _p0 uint32 + if openasself { + _p0 = 1 + } + r1, _, e1 := syscall.Syscall6( + procOpenThreadToken.Addr(), + 4, + uintptr(h), + uintptr(access), + uintptr(_p0), + uintptr(unsafe.Pointer(token)), + 0, + 0, + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func RevertToSelf() (err error) { + r1, _, e1 := syscall.Syscall(procRevertToSelf.Addr(), 0, 0, 0, 0) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func SetTokenInformation( + tokenHandle syscall.Token, + tokenInformationClass uint32, + tokenInformation uintptr, + tokenInformationLength uint32, +) (err error) { + r1, _, e1 := syscall.Syscall6( + procSetTokenInformation.Addr(), + 4, + uintptr(tokenHandle), + uintptr(tokenInformationClass), + uintptr(tokenInformation), + uintptr(tokenInformationLength), + 0, + 0, + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func RtlGenRandom(buf []byte) (err error) { + var _p0 *byte + if len(buf) > 0 { + _p0 = &buf[0] + } + r1, _, e1 := syscall.Syscall(procSystemFunction036.Addr(), 2, uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)), 0) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func GetAdaptersAddresses( + family uint32, + flags uint32, + reserved uintptr, + adapterAddresses *IpAdapterAddresses, + sizePointer *uint32, +) (errcode error) { + r0, _, _ := syscall.Syscall6( + procGetAdaptersAddresses.Addr(), + 5, + uintptr(family), + uintptr(flags), + uintptr(reserved), + uintptr(unsafe.Pointer(adapterAddresses)), + uintptr(unsafe.Pointer(sizePointer)), + 0, + ) + if r0 != 0 { + errcode = syscall.Errno(r0) + } + return +} + +func GetACP() (acp uint32) { + r0, _, _ := syscall.Syscall(procGetACP.Addr(), 0, 0, 0, 0) + acp = uint32(r0) + return +} + +func GetComputerNameEx(nameformat uint32, buf *uint16, n *uint32) (err error) { + r1, _, e1 := syscall.Syscall( + procGetComputerNameExW.Addr(), + 3, + uintptr(nameformat), + uintptr(unsafe.Pointer(buf)), + uintptr(unsafe.Pointer(n)), + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func GetConsoleCP() (ccp uint32) { + r0, _, _ := syscall.Syscall(procGetConsoleCP.Addr(), 0, 0, 0, 0) + ccp = uint32(r0) + return +} + +func GetCurrentThread() (pseudoHandle syscall.Handle, err error) { + r0, _, e1 := syscall.Syscall(procGetCurrentThread.Addr(), 0, 0, 0, 0) + pseudoHandle = syscall.Handle(r0) + if pseudoHandle == 0 { + err = errnoErr(e1) + } + return +} + +func GetFileInformationByHandleEx(handle syscall.Handle, class uint32, info *byte, bufsize uint32) (err error) { + r1, _, e1 := syscall.Syscall6( + procGetFileInformationByHandleEx.Addr(), + 4, + uintptr(handle), + uintptr(class), + uintptr(unsafe.Pointer(info)), + uintptr(bufsize), + 0, + 0, + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func GetFinalPathNameByHandle( + file syscall.Handle, + filePath *uint16, + filePathSize uint32, + flags uint32, +) (n uint32, err error) { + r0, _, e1 := syscall.Syscall6( + procGetFinalPathNameByHandleW.Addr(), + 4, + uintptr(file), + uintptr(unsafe.Pointer(filePath)), + uintptr(filePathSize), + uintptr(flags), + 0, + 0, + ) + n = uint32(r0) + if n == 0 { + err = errnoErr(e1) + } + return +} + +func GetModuleFileName(module syscall.Handle, fn *uint16, len uint32) (n uint32, err error) { + r0, _, e1 := syscall.Syscall( + procGetModuleFileNameW.Addr(), + 3, + uintptr(module), + uintptr(unsafe.Pointer(fn)), + uintptr(len), + ) + n = uint32(r0) + if n == 0 { + err = errnoErr(e1) + } + return +} + +func LockFileEx( + file syscall.Handle, + flags uint32, + reserved uint32, + bytesLow uint32, + bytesHigh uint32, + overlapped *syscall.Overlapped, +) (err error) { + r1, _, e1 := syscall.Syscall6( + procLockFileEx.Addr(), + 6, + uintptr(file), + uintptr(flags), + uintptr(reserved), + uintptr(bytesLow), + uintptr(bytesHigh), + uintptr(unsafe.Pointer(overlapped)), + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func Module32First(snapshot syscall.Handle, moduleEntry *ModuleEntry32) (err error) { + r1, _, e1 := syscall.Syscall( + procModule32FirstW.Addr(), + 2, + uintptr(snapshot), + uintptr(unsafe.Pointer(moduleEntry)), + 0, + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func Module32Next(snapshot syscall.Handle, moduleEntry *ModuleEntry32) (err error) { + r1, _, e1 := syscall.Syscall( + procModule32NextW.Addr(), + 2, + uintptr(snapshot), + uintptr(unsafe.Pointer(moduleEntry)), + 0, + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func MoveFileEx(from, to *uint16, flags uint32) (err error) { + r1, _, e1 := syscall.Syscall( + procMoveFileExW.Addr(), + 3, + uintptr(unsafe.Pointer(from)), + uintptr(unsafe.Pointer(to)), + uintptr(flags), + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func MultiByteToWideChar( + codePage uint32, + dwFlags uint32, + str *byte, + nstr int32, + wchar *uint16, + nwchar int32, +) (nwrite int32, err error) { + r0, _, e1 := syscall.Syscall6( + procMultiByteToWideChar.Addr(), + 6, + uintptr(codePage), + uintptr(dwFlags), + uintptr(unsafe.Pointer(str)), + uintptr(nstr), + uintptr(unsafe.Pointer(wchar)), + uintptr(nwchar), + ) + nwrite = int32(r0) + if nwrite == 0 { + err = errnoErr(e1) + } + return +} + +func SetFileInformationByHandle( + handle syscall.Handle, + fileInformationClass uint32, + buf uintptr, + bufsize uint32, +) (err error) { + r1, _, e1 := syscall.Syscall6( + procSetFileInformationByHandle.Addr(), + 4, + uintptr(handle), + uintptr(fileInformationClass), + uintptr(buf), + uintptr(bufsize), + 0, + 0, + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func UnlockFileEx( + file syscall.Handle, + reserved uint32, + bytesLow uint32, + bytesHigh uint32, + overlapped *syscall.Overlapped, +) (err error) { + r1, _, e1 := syscall.Syscall6( + procUnlockFileEx.Addr(), + 5, + uintptr(file), + uintptr(reserved), + uintptr(bytesLow), + uintptr(bytesHigh), + uintptr(unsafe.Pointer(overlapped)), + 0, + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func VirtualQuery(address uintptr, buffer *MemoryBasicInformation, length uintptr) (err error) { + r1, _, e1 := syscall.Syscall( + procVirtualQuery.Addr(), + 3, + uintptr(address), + uintptr(unsafe.Pointer(buffer)), + uintptr(length), + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func NetShareAdd(serverName *uint16, level uint32, buf *byte, parmErr *uint16) (neterr error) { + r0, _, _ := syscall.Syscall6( + procNetShareAdd.Addr(), + 4, + uintptr(unsafe.Pointer(serverName)), + uintptr(level), + uintptr(unsafe.Pointer(buf)), + uintptr(unsafe.Pointer(parmErr)), + 0, + 0, + ) + if r0 != 0 { + neterr = syscall.Errno(r0) + } + return +} + +func NetShareDel(serverName, netName *uint16, reserved uint32) (neterr error) { + r0, _, _ := syscall.Syscall( + procNetShareDel.Addr(), + 3, + uintptr(unsafe.Pointer(serverName)), + uintptr(unsafe.Pointer(netName)), + uintptr(reserved), + ) + if r0 != 0 { + neterr = syscall.Errno(r0) + } + return +} + +func NetUserGetLocalGroups( + serverName *uint16, + userName *uint16, + level uint32, + flags uint32, + buf **byte, + prefMaxLen uint32, + entriesRead *uint32, + totalEntries *uint32, +) (neterr error) { + r0, _, _ := syscall.Syscall9( + procNetUserGetLocalGroups.Addr(), + 8, + uintptr(unsafe.Pointer(serverName)), + uintptr(unsafe.Pointer(userName)), + uintptr(level), + uintptr(flags), + uintptr(unsafe.Pointer(buf)), + uintptr(prefMaxLen), + uintptr(unsafe.Pointer(entriesRead)), + uintptr(unsafe.Pointer(totalEntries)), + 0, + ) + if r0 != 0 { + neterr = syscall.Errno(r0) + } + return +} + +func GetProcessMemoryInfo(handle syscall.Handle, memCounters *PROCESS_MEMORY_COUNTERS, cb uint32) (err error) { + r1, _, e1 := syscall.Syscall( + procGetProcessMemoryInfo.Addr(), + 3, + uintptr(handle), + uintptr(unsafe.Pointer(memCounters)), + uintptr(cb), + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func CreateEnvironmentBlock(block **uint16, token syscall.Token, inheritExisting bool) (err error) { + var _p0 uint32 + if inheritExisting { + _p0 = 1 + } + r1, _, e1 := syscall.Syscall( + procCreateEnvironmentBlock.Addr(), + 3, + uintptr(unsafe.Pointer(block)), + uintptr(token), + uintptr(_p0), + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func DestroyEnvironmentBlock(block *uint16) (err error) { + r1, _, e1 := syscall.Syscall(procDestroyEnvironmentBlock.Addr(), 1, uintptr(unsafe.Pointer(block)), 0, 0) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func GetProfilesDirectory(dir *uint16, dirLen *uint32) (err error) { + r1, _, e1 := syscall.Syscall( + procGetProfilesDirectoryW.Addr(), + 2, + uintptr(unsafe.Pointer(dir)), + uintptr(unsafe.Pointer(dirLen)), + 0, + ) + if r1 == 0 { + err = errnoErr(e1) + } + return +} + +func WSASocket( + af int32, + typ int32, + protocol int32, + protinfo *syscall.WSAProtocolInfo, + group uint32, + flags uint32, +) (handle syscall.Handle, err error) { + r0, _, e1 := syscall.Syscall6( + procWSASocketW.Addr(), + 6, + uintptr(af), + uintptr(typ), + uintptr(protocol), + uintptr(unsafe.Pointer(protinfo)), + uintptr(group), + uintptr(flags), + ) + handle = syscall.Handle(r0) + if handle == syscall.InvalidHandle { + err = errnoErr(e1) + } + return +} diff --git a/backend/vendor/github.com/enetx/g/map.go b/backend/vendor/github.com/enetx/g/map.go new file mode 100644 index 0000000..c7e10ba --- /dev/null +++ b/backend/vendor/github.com/enetx/g/map.go @@ -0,0 +1,230 @@ +package g + +import ( + "fmt" + "maps" + + "github.com/enetx/g/f" + "github.com/enetx/iter" +) + +// NewMap creates a new Map of the specified size or an empty Map if no size is provided. +func NewMap[K comparable, V any](size ...Int) Map[K, V] { + return make(Map[K, V], Slice[Int](size).Get(0).UnwrapOrDefault()) +} + +// Transform applies a transformation function to the Map and returns the result. +func (m Map[K, V]) Transform(fn func(Map[K, V]) Map[K, V]) Map[K, V] { return fn(m) } + +// Entry returns an MapEntry object for the given key, providing fine‑grained +// control over insertion and modification of its value. +// +// Example: +// +// m := g.NewMap[string, int]() +// // Insert 1 if "foo" is absent, then increment it +// e := m.Entry("foo") +// e.OrSet(1) +// e.Transform(func(v int) int { return v + 1 }) +// +// The entire operation requires only a single key lookup and works without +// additional allocations. +func (m Map[K, V]) Entry(key K) MapEntry[K, V] { return MapEntry[K, V]{m, key} } + +// Iter returns an iterator (SeqMap[K, V]) for the Map, allowing for sequential iteration +// over its key-value pairs. It is commonly used in combination with higher-order functions, +// such as 'ForEach', to perform operations on each key-value pair of the Map. +// +// Returns: +// +// - SeqMap[K, V], which can be used for sequential iteration over the key-value pairs of the Map. +// +// Example usage: +// +// myMap := g.Map[string, int]{"one": 1, "two": 2, "three": 3} +// iterator := myMap.Iter() +// iterator.ForEach(func(key string, value int) { +// // Perform some operation on each key-value pair +// fmt.Printf("%s: %d\n", key, value) +// }) +// +// The 'Iter' method provides a convenient way to traverse the key-value pairs of a Map +// in a functional style, enabling operations like mapping or filtering. +func (m Map[K, V]) Iter() SeqMap[K, V] { return SeqMap[K, V](iter.FromMap(m)) } + +// Invert inverts the keys and values of the Map, returning a new Map with values as keys and +// keys as values. Note that the inverted Map will have 'any' as the key type, since not all value +// types are guaranteed to be comparable. +func (m Map[K, V]) Invert() Map[any, K] { + if m.Empty() { + return NewMap[any, K]() + } + + result := make(Map[any, K], len(m)) + for k, v := range m { + result[v] = k + } + + return result +} + +// Keys returns a slice of the Map's keys. +func (m Map[K, V]) Keys() Slice[K] { + if m.Empty() { + return NewSlice[K]() + } + + keys := make(Slice[K], 0, len(m)) + for k := range m { + keys = append(keys, k) + } + + return keys +} + +// Values returns a slice of the Map's values. +func (m Map[K, V]) Values() Slice[V] { + if m.Empty() { + return NewSlice[V]() + } + + values := make(Slice[V], 0, len(m)) + for _, v := range m { + values = append(values, v) + } + + return values +} + +// Contains checks if the Map contains the specified key. +func (m Map[K, V]) Contains(key K) bool { + _, ok := m[key] + return ok +} + +// Clone creates a new Map that is a copy of the original Map. +func (m Map[K, V]) Clone() Map[K, V] { return maps.Clone(m) } + +// Copy copies the source Map's key-value pairs to the target Map. +func (m Map[K, V]) Copy(src Map[K, V]) { maps.Copy(m, src) } + +// Delete removes the specified keys from the Map. +func (m Map[K, V]) Delete(keys ...K) { + for _, key := range keys { + delete(m, key) + } +} + +// Std converts the Map to a regular Go map. +func (m Map[K, V]) Std() map[K]V { return m } + +// ToMapOrd converts a standard Map to an ordered Map. +func (m Map[K, V]) ToMapOrd() MapOrd[K, V] { + mo := NewMapOrd[K, V](m.Len()) + for k, v := range m { + mo.Set(k, v) + } + + return mo +} + +// ToMapSafe converts a standard Map to a thread-safe Map. +func (m Map[K, V]) ToMapSafe() *MapSafe[K, V] { + ms := NewMapSafe[K, V]() + for k, v := range m { + ms.Set(k, v) + } + + return ms +} + +// Eq checks if two Maps are equal. +func (m Map[K, V]) Eq(other Map[K, V]) bool { + n := len(m) + if n != len(other) { + return false + } + + if n == 0 { + return true + } + + var zero V + comparable := f.IsComparable(zero) + + for k, value := range m { + ovalue, ok := other[k] + if !ok || comparable && !f.Eq[any](value)(ovalue) || !comparable && !f.Eqd(value)(ovalue) { + return false + } + } + + return true +} + +// String returns a string representation of the Map. +func (m Map[K, V]) String() string { + if len(m) == 0 { + return "Map{}" + } + + var b Builder + b.WriteString("Map{") + + first := true + for k, v := range m { + if !first { + b.WriteString(", ") + } + + first = false + b.WriteString(Format("{}:{}", k, v)) + } + + b.WriteString("}") + + return b.String().Std() +} + +// Clear removes all key-value pairs from the Map. +func (m Map[K, V]) Clear() { clear(m) } + +// Empty checks if the Map is empty. +func (m Map[K, V]) Empty() bool { return len(m) == 0 } + +// Get retrieves the value associated with the given key. +func (m Map[K, V]) Get(k K) Option[V] { + if v, ok := m[k]; ok { + return Some(v) + } + + return None[V]() +} + +// Len returns the number of key-value pairs in the Map. +func (m Map[K, V]) Len() Int { return Int(len(m)) } + +// Ne checks if two Maps are not equal. +func (m Map[K, V]) Ne(other Map[K, V]) bool { return !m.Eq(other) } + +// NotEmpty checks if the Map is not empty. +func (m Map[K, V]) NotEmpty() bool { return !m.Empty() } + +// Set sets the value for the key and returns the previous value if it existed. +func (m Map[K, V]) Set(key K, value V) Option[V] { + prev, ok := m[key] + m[key] = value + if ok { + return Some(prev) + } + + return None[V]() +} + +// Print writes the key-value pairs of the Map to the standard output (console) +// and returns the Map unchanged. +func (m Map[K, V]) Print() Map[K, V] { fmt.Print(m); return m } + +// Println writes the key-value pairs of the Map to the standard output (console) with a newline +// and returns the Map unchanged. +func (m Map[K, V]) Println() Map[K, V] { fmt.Println(m); return m } diff --git a/backend/vendor/github.com/enetx/g/map_entry.go b/backend/vendor/github.com/enetx/g/map_entry.go new file mode 100644 index 0000000..f666bfc --- /dev/null +++ b/backend/vendor/github.com/enetx/g/map_entry.go @@ -0,0 +1,68 @@ +package g + +// Get returns Some(value) if the key exists, otherwise None. +func (e MapEntry[K, V]) Get() Option[V] { + return e.m.Get(e.key) +} + +// OrSet inserts value if the key is vacant. Returns Some(existing) or None if newly inserted. +func (e MapEntry[K, V]) OrSet(value V) Option[V] { + if existing, ok := e.m[e.key]; ok { + return Some(existing) + } + + e.m[e.key] = value + + return None[V]() +} + +// OrSetBy inserts the value from fn() if the key is vacant. Returns Some(existing) or None. +func (e MapEntry[K, V]) OrSetBy(fn func() V) Option[V] { + if existing, ok := e.m[e.key]; ok { + return Some(existing) + } + + e.m[e.key] = fn() + + return None[V]() +} + +// OrDefault inserts the zero value if the key is vacant. Returns Some(existing) or None. +func (e MapEntry[K, V]) OrDefault() Option[V] { + var zero V + return e.OrSet(zero) +} + +// Transform applies fn to the existing value. Returns Some(updated) or None if key was absent. +func (e MapEntry[K, V]) Transform(fn func(V) V) Option[V] { + if value, ok := e.m[e.key]; ok { + value = fn(value) + e.m[e.key] = value + + return Some(value) + } + + return None[V]() +} + +// Set sets the value and returns Some(previous) if the key existed, or None otherwise. +func (e MapEntry[K, V]) Set(value V) Option[V] { + old, ok := e.m[e.key] + e.m[e.key] = value + if ok { + return Some(old) + } + + return None[V]() +} + +// Delete removes the key from the map. +// Returns Some(removed_value) if present, None otherwise. +func (e MapEntry[K, V]) Delete() Option[V] { + if value, ok := e.m[e.key]; ok { + delete(e.m, e.key) + return Some(value) + } + + return None[V]() +} diff --git a/backend/vendor/github.com/enetx/g/map_iter.go b/backend/vendor/github.com/enetx/g/map_iter.go new file mode 100644 index 0000000..34809bd --- /dev/null +++ b/backend/vendor/github.com/enetx/g/map_iter.go @@ -0,0 +1,382 @@ +package g + +import ( + "context" + "runtime" + + "github.com/enetx/iter" +) + +// IterPar parallelizes the SeqMap using the specified number of workers. +func (seq SeqMap[K, V]) Parallel(workers ...Int) SeqMapPar[K, V] { + numCPU := Int(runtime.NumCPU()) + count := Slice[Int](workers).Get(0).UnwrapOr(numCPU) + + if count.Lte(0) { + count = numCPU + } + + return SeqMapPar[K, V]{ + seq: seq, + workers: count, + process: func(p Pair[K, V]) (Pair[K, V], bool) { return p, true }, + } +} + +// Pull converts the “push-style” iterator sequence seq +// into a “pull-style” iterator accessed by the two functions +// next and stop. +// +// Next returns the next pair in the sequence +// and a boolean indicating whether the pair is valid. +// When the sequence is over, next returns a pair of zero values and false. +// It is valid to call next after reaching the end of the sequence +// or after calling stop. These calls will continue +// to return a pair of zero values and false. +// +// Stop ends the iteration. It must be called when the caller is +// no longer interested in next values and next has not yet +// signaled that the sequence is over (with a false boolean return). +// It is valid to call stop multiple times and when next has +// already returned false. +// +// It is an error to call next or stop from multiple goroutines +// simultaneously. +func (seq SeqMap[K, V]) Pull() (func() (K, V, bool), func()) { return iter.Pull2(iter.Seq2[K, V](seq)) } + +// Take returns a new iterator with the first n elements. +// The function creates a new iterator containing the first n elements from the original iterator. +func (seq SeqMap[K, V]) Take(n uint) SeqMap[K, V] { + return SeqMap[K, V](iter.Take2(iter.Seq2[K, V](seq), int(n))) +} + +// Nth returns the nth key-value pair (0-indexed) in the sequence. +func (seq SeqMap[K, V]) Nth(n Int) Option[Pair[K, V]] { + key, value, found := iter.Nth2(iter.Seq2[K, V](seq), int(n)) + if found { + return Some(Pair[K, V]{Key: key, Value: value}) + } + + return None[Pair[K, V]]() +} + +// Keys returns an iterator containing all the keys in the ordered Map. +func (seq SeqMap[K, V]) Keys() SeqSlice[K] { + return SeqSlice[K](iter.Keys(iter.Seq2[K, V](seq))) +} + +// Values returns an iterator containing all the values in the ordered Map. +func (seq SeqMap[K, V]) Values() SeqSlice[V] { + return SeqSlice[V](iter.Values(iter.Seq2[K, V](seq))) +} + +// Chain creates a new iterator by concatenating the current iterator with other iterators. +// +// The function concatenates the key-value pairs from the current iterator with the key-value pairs from the provided iterators, +// producing a new iterator containing all concatenated elements. +// +// Params: +// +// - seqs ([]SeqMap[K, V]): Other iterators to be concatenated with the current iterator. +// +// Returns: +// +// - SeqMap[K, V]: A new iterator containing elements from the current iterator and the provided iterators. +// +// Example usage: +// +// iter1 := g.NewMap[int, string]().Set(1, "a").Iter() +// iter2 := g.NewMap[int, string]().Set(2, "b").Iter() +// +// // Concatenating iterators and collecting the result. +// iter1.Chain(iter2).Collect().Print() +// +// Output: Map{1:a, 2:b} // The output order may vary as Map is not ordered. +// +// The resulting iterator will contain elements from both iterators. +func (seq SeqMap[K, V]) Chain(seqs ...SeqMap[K, V]) SeqMap[K, V] { + iterSeqs := make([]iter.Seq2[K, V], len(seqs)) + for i, s := range seqs { + iterSeqs[i] = iter.Seq2[K, V](s) + } + + return SeqMap[K, V](iter.Chain2(iter.Seq2[K, V](seq), iterSeqs...)) +} + +// Count consumes the iterator, counting the number of iterations and returning it. +func (seq SeqMap[K, V]) Count() Int { return Int(iter.Count2(iter.Seq2[K, V](seq))) } + +// Collect collects all key-value pairs from the iterator and returns a Map. +func (seq SeqMap[K, V]) Collect() Map[K, V] { + collection := NewMap[K, V]() + + seq(func(k K, v V) bool { + collection[k] = v + return true + }) + + return collection +} + +// Filter returns a new iterator containing only the elements that satisfy the provided function. +// +// This function creates a new iterator containing key-value pairs for which the provided function returns true. +// It iterates through the current iterator, applying the function to each key-value pair. +// If the function returns true for a key-value pair, it will be included in the resulting iterator. +// +// Params: +// +// - fn (func(K, V) bool): The function applied to each key-value pair to determine inclusion. +// +// Returns: +// +// - SeqMap[K, V]: An iterator containing elements that satisfy the given function. +// +// m := g.NewMap[int, int](). +// Set(1, 1). +// Set(2, 2). +// Set(3, 3). +// Set(4, 4). +// Set(5, 5) +// +// even := m.Iter(). +// Filter( +// func(k, v int) bool { +// return v%2 == 0 +// }). +// Collect() +// even.Print() +// +// Output: Map{2:2, 4:4} // The output order may vary as Map is not ordered. +// +// The resulting iterator will contain elements for which the function returns true. +func (seq SeqMap[K, V]) Filter(fn func(K, V) bool) SeqMap[K, V] { + return SeqMap[K, V](iter.Filter2(iter.Seq2[K, V](seq), fn)) +} + +// Exclude returns a new iterator excluding elements that satisfy the provided function. +// +// This function creates a new iterator excluding key-value pairs for which the provided function returns true. +// It iterates through the current iterator, applying the function to each key-value pair. +// If the function returns true for a key-value pair, it will be excluded from the resulting iterator. +// +// Params: +// +// - fn (func(K, V) bool): The function applied to each key-value pair to determine exclusion. +// +// Returns: +// +// - SeqMap[K, V]: An iterator excluding elements that satisfy the given function. +// +// Example usage: +// +// m := g.NewMap[int, int](). +// Set(1, 1). +// Set(2, 2). +// Set(3, 3). +// Set(4, 4). +// Set(5, 5) +// +// notEven := m.Iter(). +// Exclude( +// func(k, v int) bool { +// return v%2 == 0 +// }). +// Collect() +// notEven.Print() +// +// Output: Map{1:1, 3:3, 5:5} // The output order may vary as Map is not ordered. +// +// The resulting iterator will exclude elements for which the function returns true. +func (seq SeqMap[K, V]) Exclude(fn func(K, V) bool) SeqMap[K, V] { + return SeqMap[K, V](iter.Exclude2(iter.Seq2[K, V](seq), fn)) +} + +// Find searches for an element in the iterator that satisfies the provided function. +// +// The function iterates through the elements of the iterator and returns the first element +// for which the provided function returns true. +// +// Params: +// +// - fn (func(K, V) bool): The function used to test elements for a condition. +// +// Returns: +// +// - Option[K, V]: An Option containing the first element that satisfies the condition; None if not found. +// +// Example usage: +// +// m := g.NewMap[int, int]() +// m.Set(1, 1) +// f := m.Iter().Find(func(_ int, v int) bool { return v == 1 }) +// if f.IsSome() { +// print(f.Some().Key) +// } +// +// The resulting Option may contain the first element that satisfies the condition, or None if not found. +func (seq SeqMap[K, V]) Find(fn func(k K, v V) bool) Option[Pair[K, V]] { + key, value, found := iter.Find2(iter.Seq2[K, V](seq), fn) + if found { + return Some(Pair[K, V]{Key: key, Value: value}) + } + + return None[Pair[K, V]]() +} + +// ForEach iterates through all elements and applies the given function to each key-value pair. +// +// This function traverses the entire iterator and applies the provided function to each key-value pair. +// It iterates through the current iterator, executing the function on each key-value pair. +// +// Params: +// +// - fn (func(K, V)): The function to be applied to each key-value pair in the iterator. +// +// Example usage: +// +// m := g.NewMap[int, int](). +// Set(1, 1). +// Set(2, 2). +// Set(3, 3). +// Set(4, 4). +// Set(5, 5) +// +// mmap := m.Iter(). +// Map( +// func(k, v int) (int, int) { +// return k * k, v * v +// }). +// Collect() +// +// mmap.Print() +// +// Output: Map{1:1, 4:4, 9:9, 16:16, 25:25} // The output order may vary as Map is not ordered. +// +// The function fn will be executed for each key-value pair in the iterator. +func (seq SeqMap[K, V]) ForEach(fn func(k K, v V)) { iter.ForEach2(iter.Seq2[K, V](seq), fn) } + +// Inspect creates a new iterator that wraps around the current iterator +// and allows inspecting each key-value pair as it passes through. +func (seq SeqMap[K, V]) Inspect(fn func(k K, v V)) SeqMap[K, V] { + return SeqMap[K, V](iter.Inspect2(iter.Seq2[K, V](seq), fn)) +} + +// Map creates a new iterator by applying the given function to each key-value pair. +// +// This function generates a new iterator by traversing the current iterator and applying the provided +// function to each key-value pair. It transforms the key-value pairs according to the given function. +// +// Params: +// +// - fn (func(K, V) (K, V)): The function to be applied to each key-value pair in the iterator. +// It takes a key-value pair and returns a new transformed key-value pair. +// +// Returns: +// +// - SeqMap[K, V]: A new iterator containing key-value pairs transformed by the provided function. +// +// Example usage: +// +// m := g.NewMap[int, int](). +// Set(1, 1). +// Set(2, 2). +// Set(3, 3). +// Set(4, 4). +// Set(5, 5) +// +// mmap := m.Iter(). +// Map( +// func(k, v int) (int, int) { +// return k * k, v * v +// }). +// Collect() +// +// mmap.Print() +// +// Output: Map{1:1, 4:4, 9:9, 16:16, 25:25} // The output order may vary as Map is not ordered. +// +// The resulting iterator will contain key-value pairs transformed by the given function. +func (seq SeqMap[K, V]) Map(transform func(K, V) (K, V)) SeqMap[K, V] { + return SeqMap[K, V](iter.Map2(iter.Seq2[K, V](seq), transform)) +} + +// FilterMap applies a function to each key-value pair and filters out None results. +// +// The function transforms and filters pairs in a single pass. Pairs where the function +// returns None are filtered out, and pairs where it returns Some are unwrapped +// and included in the result. +// +// Params: +// +// - fn (func(K, V) Option[Pair[K, V]]): The function that transforms and filters pairs. +// Returns Some(Pair{key, value}) to include the transformed pair, or None to filter it out. +// +// Returns: +// +// - SeqMap[K, V]: A sequence containing only the successfully transformed pairs. +// +// Example usage: +// +// configs := g.Map[string, string]{"host": "localhost", "port": "8080", "debug": "invalid"} +// validConfigs := configs.Iter().FilterMap(func(k string, v string) Option[Pair[string, string]] { +// if k == "port" || k == "host" { +// return Some(Pair[string, string]{Key: k, Value: v + "_validated"}) +// } +// return None[Pair[string, string]]() +// }) +// // validConfigs will yield: {"host": "localhost_validated", "port": "8080_validated"} +// +// users := g.Map[string, int]{"alice": 25, "bob": 17, "charlie": 30} +// adults := users.Iter().FilterMap(func(name string, age int) Option[Pair[string, int]] { +// if age >= 18 { +// return Some(Pair[string, int]{Key: name, Value: age}) +// } +// return None[Pair[string, int]]() +// }) +// // adults will yield: {"alice": 25, "charlie": 30} +func (seq SeqMap[K, V]) FilterMap(fn func(K, V) Option[Pair[K, V]]) SeqMap[K, V] { + return SeqMap[K, V](iter.FilterMap2(iter.Seq2[K, V](seq), func(k K, v V) (iter.Pair[K, V], bool) { + return fn(k, v).Option() + })) +} + +// The iteration will stop when the provided function returns false for an element. +func (seq SeqMap[K, V]) Range(fn func(k K, v V) bool) { iter.Range2(iter.Seq2[K, V](seq), fn) } + +// Context allows the iteration to be controlled with a context.Context. +func (seq SeqMap[K, V]) Context(ctx context.Context) SeqMap[K, V] { + return SeqMap[K, V](iter.Context2(iter.Seq2[K, V](seq), ctx)) +} + +// Next extracts the next key-value pair from the iterator and advances it. +// +// This method consumes the next key-value pair from the iterator and returns them wrapped in an Option. +// The iterator itself is modified to point to the remaining elements. +// +// Returns: +// - Option[Pair[K, V]]: Some(Pair{Key, Value}) if a pair exists, None if the iterator is exhausted. +func (seq *SeqMap[K, V]) Next() Option[Pair[K, V]] { + var pairs []Pair[K, V] + + (*seq)(func(k K, v V) bool { + pairs = append(pairs, Pair[K, V]{Key: k, Value: v}) + return true + }) + + if len(pairs) == 0 { + return None[Pair[K, V]]() + } + + first := Some(pairs[0]) + + *seq = func(yield func(K, V) bool) { + for _, pair := range pairs[1:] { + if !yield(pair.Key, pair.Value) { + return + } + } + } + + return first +} diff --git a/backend/vendor/github.com/enetx/g/map_iter_par.go b/backend/vendor/github.com/enetx/g/map_iter_par.go new file mode 100644 index 0000000..956d0f8 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/map_iter_par.go @@ -0,0 +1,293 @@ +package g + +import ( + "sync" + "sync/atomic" +) + +// All returns true if fn returns true for every pair. +func (p SeqMapPar[K, V]) All(fn func(K, V) bool) bool { + var ok atomic.Bool + ok.Store(true) + + p.Range(func(k K, v V) bool { + if !fn(k, v) { + ok.Store(false) + return false + } + return true + }) + + return ok.Load() +} + +// Any returns true if fn returns true for any pair. +func (p SeqMapPar[K, V]) Any(fn func(K, V) bool) bool { + var ok atomic.Bool + + p.Range(func(k K, v V) bool { + if fn(k, v) { + ok.Store(true) + return false + } + return true + }) + + return ok.Load() +} + +// Chain concatenates this SeqMapPar with others, preserving full parallelism. +// Each sequence runs with its own worker pool in parallel.. +func (p SeqMapPar[K, V]) Chain(others ...SeqMapPar[K, V]) SeqMapPar[K, V] { + return SeqMapPar[K, V]{ + seq: func(yield func(K, V) bool) { + done := make(chan struct{}) + result := make(chan Pair[K, V], 100) + + var ( + wg sync.WaitGroup + once sync.Once + ) + + runSequence := func(seq SeqMapPar[K, V]) { + defer wg.Done() + seq.Range(func(k K, v V) bool { + select { + case <-done: + return false + case result <- Pair[K, V]{Key: k, Value: v}: + return true + } + }) + } + + go func() { + defer close(result) + + wg.Add(1) + go runSequence(p) + + for _, o := range others { + wg.Add(1) + go runSequence(o) + } + + wg.Wait() + }() + + for { + select { + case <-done: + return + case pair, ok := <-result: + if !ok { + return + } + if !yield(pair.Key, pair.Value) { + once.Do(func() { close(done) }) + return + } + } + } + }, + workers: p.workers, + process: func(pair Pair[K, V]) (Pair[K, V], bool) { return pair, true }, + } +} + +// Collect gathers all processed pairs into a Map. +func (p SeqMapPar[K, V]) Collect() Map[K, V] { + ch := make(chan Pair[K, V]) + + go func() { + defer close(ch) + p.Range(func(k K, v V) bool { + ch <- Pair[K, V]{Key: k, Value: v} + return true + }) + }() + + m := NewMap[K, V]() + for pair := range ch { + m.Set(pair.Key, pair.Value) + } + + return m +} + +// Count returns the total number of processed pairs. +func (p SeqMapPar[K, V]) Count() Int { + var cnt atomic.Int64 + + p.Range(func(_ K, _ V) bool { + cnt.Add(1) + return true + }) + + return Int(cnt.Load()) +} + +// Exclude removes pairs where fn returns true. +func (p SeqMapPar[K, V]) Exclude(fn func(K, V) bool) SeqMapPar[K, V] { + return p.Filter(func(k K, v V) bool { return !fn(k, v) }) +} + +// Filter retains only pairs where fn returns true. +func (p SeqMapPar[K, V]) Filter(fn func(K, V) bool) SeqMapPar[K, V] { + prev := p.process + + return SeqMapPar[K, V]{ + seq: p.seq, + workers: p.workers, + process: func(pair Pair[K, V]) (Pair[K, V], bool) { + if mid, ok := prev(pair); ok && fn(mid.Key, mid.Value) { + return mid, true + } + return Pair[K, V]{}, false + }, + } +} + +// Find returns the first pair matching fn, or a zero Option if none. +func (p SeqMapPar[K, V]) Find(fn func(K, V) bool) Option[Pair[K, V]] { + ch := make(chan Pair[K, V]) + + go func() { + defer close(ch) + p.Range(func(k K, v V) bool { + if fn(k, v) { + ch <- Pair[K, V]{Key: k, Value: v} + return false + } + return true + }) + }() + + if pair, ok := <-ch; ok { + return Some(pair) + } + + return None[Pair[K, V]]() +} + +// ForEach invokes fn on each key/value pair for side-effects, +// processing all pairs in parallel without early exit. +func (p SeqMapPar[K, V]) ForEach(fn func(K, V)) { + p.Range(func(k K, v V) bool { + fn(k, v) + return true + }) +} + +// Inspect invokes fn on each key/value pair for side-effects, +// without modifying the resulting sequence. +func (p SeqMapPar[K, V]) Inspect(fn func(K, V)) SeqMapPar[K, V] { + prev := p.process + + return SeqMapPar[K, V]{ + seq: p.seq, + workers: p.workers, + process: func(pair Pair[K, V]) (Pair[K, V], bool) { + if mid, ok := prev(pair); ok { + fn(mid.Key, mid.Value) + return mid, true + } + return Pair[K, V]{}, false + }, + } +} + +// Map applies transform to each pair. +func (p SeqMapPar[K, V]) Map(transform func(K, V) (K, V)) SeqMapPar[K, V] { + prev := p.process + + return SeqMapPar[K, V]{ + seq: p.seq, + workers: p.workers, + process: func(pair Pair[K, V]) (Pair[K, V], bool) { + if mid, ok := prev(pair); ok { + k2, v2 := transform(mid.Key, mid.Value) + return Pair[K, V]{Key: k2, Value: v2}, true + } + return Pair[K, V]{}, false + }, + } +} + +// Range applies fn to each processed pair in parallel, stopping early if fn returns false. +func (p SeqMapPar[K, V]) Range(fn func(K, V) bool) { + in := make(chan Pair[K, V]) + done := make(chan struct{}) + + var ( + wg sync.WaitGroup + once sync.Once + ) + + go func() { + defer close(in) + p.seq(func(k K, v V) bool { + select { + case <-done: + return false + case in <- Pair[K, V]{Key: k, Value: v}: + return true + } + }) + }() + + wg.Add(int(p.workers)) + for range p.workers { + go func() { + defer wg.Done() + for pair := range in { + if mid, ok := p.process(pair); ok { + if !fn(mid.Key, mid.Value) { + once.Do(func() { close(done) }) + return + } + } + } + }() + } + + wg.Wait() +} + +// Skip drops the first n pairs. +func (p SeqMapPar[K, V]) Skip(n Int) SeqMapPar[K, V] { + prev := p.process + + return SeqMapPar[K, V]{ + seq: func(yield func(K, V) bool) { + var cnt int64 + p.seq(func(k K, v V) bool { + if atomic.AddInt64(&cnt, 1) > int64(n) { + return yield(k, v) + } + return true + }) + }, + workers: p.workers, + process: prev, + } +} + +// Take yields at most n pairs. +func (p SeqMapPar[K, V]) Take(n Int) SeqMapPar[K, V] { + prev := p.process + + return SeqMapPar[K, V]{ + seq: func(yield func(K, V) bool) { + var cnt int64 + p.seq(func(k K, v V) bool { + if atomic.AddInt64(&cnt, 1) <= int64(n) { + return yield(k, v) + } + return false + }) + }, + workers: p.workers, + process: prev, + } +} diff --git a/backend/vendor/github.com/enetx/g/map_ordered.go b/backend/vendor/github.com/enetx/g/map_ordered.go new file mode 100644 index 0000000..a420211 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/map_ordered.go @@ -0,0 +1,493 @@ +package g + +import ( + "fmt" + "slices" + + "github.com/enetx/g/cmp" + "github.com/enetx/g/f" + "github.com/enetx/g/rand" +) + +// NewMapOrd creates a new ordered Map with the specified size (if provided). +// An ordered Map is an Map that maintains the order of its key-value pairs based on the +// insertion order. If no size is provided, the default size will be used. +// +// Parameters: +// +// - size ...int: (Optional) The initial size of the ordered Map. If not provided, a default size +// will be used. +// +// Returns: +// +// - MapOrd[K, V]: Ordered Map with the specified initial size (or default +// size if not provided). +// +// Example usage: +// +// mapOrd := g.NewMapOrd[string, int](10) +// +// Creates a new ordered Map with an initial size of 10. +func NewMapOrd[K comparable, V any](size ...Int) MapOrd[K, V] { + return make(MapOrd[K, V], 0, Slice[Int](size).Get(0).UnwrapOrDefault()) +} + +// Transform applies a transformation function to the MapOrd and returns the result. +func (mo MapOrd[K, V]) Transform(fn func(MapOrd[K, V]) MapOrd[K, V]) MapOrd[K, V] { return fn(mo) } + +// Entry returns a MapOrdEntry object for the given key, providing fine-grained +// control over insertion, mutation, and deletion of its value in the ordered Map, +// while preserving the insertion order. +// +// Example: +// +// mo := g.NewMapOrd[string, int]() +// // Insert 1 if "foo" is absent, then increment it +// e := mo.Entry("foo") +// e.OrSet(1). +// e.Transform(func(v int) int { return v + 1 }) +// +// The entire operation requires only a single key lookup and works without +// additional allocations. +func (mo *MapOrd[K, V]) Entry(key K) MapOrdEntry[K, V] { return MapOrdEntry[K, V]{mo, key} } + +// Iter returns an iterator (SeqMapOrd[K, V]) for the ordered Map, allowing for sequential iteration +// over its key-value pairs. It is commonly used in combination with higher-order functions, +// such as 'ForEach', to perform operations on each key-value pair of the ordered Map. +// +// Returns: +// +// A SeqMapOrd[K, V], which can be used for sequential iteration over the key-value pairs of the ordered Map. +// +// Example usage: +// +// m := g.NewMapOrd[int, int]() +// m.Set(1, 1) +// m.Set(2, 2) +// m.Set(3, 3). +// +// m.Iter().ForEach(func(k, v int) { +// // Process key-value pair +// }) +// +// The 'Iter' method provides a convenient way to traverse the key-value pairs of an ordered Map +// in a functional style, enabling operations like mapping or filtering. +func (mo MapOrd[K, V]) Iter() SeqMapOrd[K, V] { + return func(yield func(K, V) bool) { + for _, v := range mo { + if !yield(v.Key, v.Value) { + return + } + } + } +} + +// IterReverse returns an iterator (SeqMapOrd[K, V]) for the ordered Map that allows for sequential iteration +// over its key-value pairs in reverse order. This method is useful when you need to process the elements +// from the last to the first. +// +// Returns: +// +// A SeqMapOrd[K, V], which can be used for sequential iteration over the key-value pairs of the ordered Map in reverse order. +// +// Example usage: +// +// m := g.NewMapOrd[int, int]() +// m.Set(1, 1) +// m.Set(2, 2) +// m.Set(3, 3) +// +// m.IterReverse().ForEach(func(k, v int) { +// // Process key-value pair in reverse order +// fmt.Println("Key:", k, "Value:", v) +// }) +// +// The 'IterReverse' method complements the 'Iter' method by providing a way to access the elements +// in a reverse sequence, offering additional flexibility in data processing scenarios. +func (mo MapOrd[K, V]) IterReverse() SeqMapOrd[K, V] { + return func(yield func(K, V) bool) { + for i := len(mo) - 1; i >= 0; i-- { + v := mo[i] + if !yield(v.Key, v.Value) { + return + } + } + } +} + +// MapOrdFromStd converts a standard Go map to an ordered Map. +// The resulting ordered Map will maintain the order of its key-value pairs based on the order of +// insertion. +// This function is useful when you want to create an ordered Map from an existing Go map. +// +// Parameters: +// +// - m map[K]V: The input Go map to be converted to an ordered Map. +// +// Returns: +// +// - MapOrd[K, V]: New ordered Map containing the same key-value pairs as the +// input Go map. +// +// Example usage: +// +// mapOrd := g.MapOrdFromStd[string, int](goMap) +// +// Converts the standard Go map 'map[K]V' to an ordered Map. +func MapOrdFromStd[K comparable, V any](m map[K]V) MapOrd[K, V] { return Map[K, V](m).ToMapOrd() } + +// SortBy sorts the ordered Map by a custom comparison function. +// +// Parameters: +// +// - fn func(a, b Pair[K, V]) cmp.Ordering: The custom comparison function used for sorting the ordered Map. +// +// Example usage: +// +// hmapo.SortBy(func(a, b g.Pair[g.String, g.Int]) cmp.Ordering { return a.Key.Cmp(b.Key) }) +// hmapo.SortBy(func(a, b g.Pair[g.String, g.Int]) cmp.Ordering { return a.Value.Cmp(b.Value) }) +func (mo MapOrd[K, V]) SortBy(fn func(a, b Pair[K, V]) cmp.Ordering) { + slices.SortFunc(mo, func(a, b Pair[K, V]) int { return int(fn(a, b)) }) +} + +// SortByKey sorts the ordered MapOrd[K, V] by the keys using a custom comparison function. +// +// Parameters: +// +// - fn func(a, b K) cmp.Ordering: The custom comparison function used for sorting the keys. +// +// Example usage: +// +// hmapo.SortByKey(func(a, b g.String) cmp.Ordering { return a.Cmp(b) }) +func (mo MapOrd[K, V]) SortByKey(fn func(a, b K) cmp.Ordering) { + slices.SortFunc(mo, func(a, b Pair[K, V]) int { return int(fn(a.Key, b.Key)) }) +} + +// SortByValue sorts the ordered MapOrd[K, V] by the values using a custom comparison function. +// +// Parameters: +// +// - fn func(a, b V) cmp.Ordering: The custom comparison function used for sorting the values. +// +// Example usage: +// +// hmapo.SortByValue(func(a, b g.Int) cmp.Ordering { return a.Cmp(b) }) +func (mo MapOrd[K, V]) SortByValue(fn func(a, b V) cmp.Ordering) { + slices.SortFunc(mo, func(a, b Pair[K, V]) int { return int(fn(a.Value, b.Value)) }) +} + +// IsSortedBy checks if the ordered Map is sorted according to a custom comparison function. +// +// Parameters: +// +// - fn func(a, b Pair[K, V]) cmp.Ordering: The custom comparison function used for checking sort order. +// +// Returns: +// +// - bool: true if the map is sorted according to the comparison function, false otherwise. +// +// Example usage: +// +// sorted := hmapo.IsSortedBy(func(a, b g.Pair[g.String, g.Int]) cmp.Ordering { return a.Key.Cmp(b.Key) }) +func (mo MapOrd[K, V]) IsSortedBy(fn func(a, b Pair[K, V]) cmp.Ordering) bool { + if len(mo) <= 1 { + return true + } + + for i := 1; i < len(mo); i++ { + if fn(mo[i-1], mo[i]).IsGt() { + return false + } + } + + return true +} + +// IsSortedByKey checks if the ordered MapOrd[K, V] is sorted by the keys using a custom comparison function. +// +// Parameters: +// +// - fn func(a, b K) cmp.Ordering: The custom comparison function used for checking key sort order. +// +// Returns: +// +// - bool: true if the map is sorted by keys according to the comparison function, false otherwise. +// +// Example usage: +// +// sorted := hmapo.IsSortedByKey(func(a, b g.String) cmp.Ordering { return a.Cmp(b) }) +func (mo MapOrd[K, V]) IsSortedByKey(fn func(a, b K) cmp.Ordering) bool { + if len(mo) <= 1 { + return true + } + + for i := 1; i < len(mo); i++ { + if fn(mo[i-1].Key, mo[i].Key).IsGt() { + return false + } + } + + return true +} + +// IsSortedByValue checks if the ordered MapOrd[K, V] is sorted by the values using a custom comparison function. +// +// Parameters: +// +// - fn func(a, b V) cmp.Ordering: The custom comparison function used for checking value sort order. +// +// Returns: +// +// - bool: true if the map is sorted by values according to the comparison function, false otherwise. +// +// Example usage: +// +// sorted := hmapo.IsSortedByValue(func(a, b g.Int) cmp.Ordering { return a.Cmp(b) }) +func (mo MapOrd[K, V]) IsSortedByValue(fn func(a, b V) cmp.Ordering) bool { + if len(mo) <= 1 { + return true + } + + for i := 1; i < len(mo); i++ { + if fn(mo[i-1].Value, mo[i].Value).IsGt() { + return false + } + } + + return true +} + +// Clone creates a new ordered Map with the same key-value pairs. +func (mo MapOrd[K, V]) Clone() MapOrd[K, V] { + nmo := NewMapOrd[K, V](mo.Len()) + nmo.Copy(mo) + + return nmo +} + +// Copy copies key-value pairs from the source ordered Map to the current ordered Map. +func (mo *MapOrd[K, V]) Copy(src MapOrd[K, V]) { + idx := mo.indexMap() + + for _, p := range src { + if i, ok := idx[p.Key]; ok { + (*mo)[i].Value = p.Value + } else { + *mo = append(*mo, p) + idx[p.Key] = len(*mo) - 1 + } + } +} + +// ToMap converts the ordered Map to a standard Map. +func (mo MapOrd[K, V]) ToMap() Map[K, V] { + m := NewMap[K, V](mo.Len()) + mo.Iter().ForEach(func(k K, v V) { m[k] = v }) + + return m +} + +// ToMapSafe converts a ordered Map to a thread-safe Map. +func (mo MapOrd[K, V]) ToMapSafe() *MapSafe[K, V] { + ms := NewMapSafe[K, V]() + mo.Iter().ForEach(func(k K, v V) { ms.Set(k, v) }) + + return ms +} + +// Set sets the value for the specified key in the ordered Map, +// and returns the previous value if it existed. +func (mo *MapOrd[K, V]) Set(key K, value V) Option[V] { + if i := mo.index(key); i != -1 { + prev := (*mo)[i].Value + (*mo)[i].Value = value + + return Some(prev) + } + + mp := Pair[K, V]{Key: key, Value: value} + *mo = append(*mo, mp) + + return None[V]() +} + +// Get returns the value associated with the given key, wrapped in Option[V]. +// +// It returns Some(value) if the key exists, or None if it does not. +func (mo MapOrd[K, V]) Get(key K) Option[V] { + if i := mo.index(key); i != -1 { + return Some(mo[i].Value) + } + + return None[V]() +} + +// Shuffle randomly reorders the elements of the ordered Map. +// It operates in place and affects the original order of the map's entries. +// +// The function uses the crypto/rand package to generate random indices. +func (mo MapOrd[K, V]) Shuffle() { + for i := mo.Len() - 1; i > 0; i-- { + j := rand.N(i + 1) + mo[i], mo[j] = mo[j], mo[i] + } +} + +// Invert inverts the key-value pairs in the ordered Map, creating a new ordered Map with the +// values as keys and the original keys as values. +func (mo MapOrd[K, V]) Invert() MapOrd[any, K] { + if mo.Empty() { + return NewMapOrd[any, K]() + } + + result := make(MapOrd[any, K], 0, len(mo)) + for _, pair := range mo { + result = append(result, Pair[any, K]{Key: pair.Value, Value: pair.Key}) + } + + return result +} + +func (mo MapOrd[K, V]) index(key K) int { + for i, mp := range mo { + if mp.Key == key { + return i + } + } + + return -1 +} + +// Keys returns an Slice containing all the keys in the ordered Map. +func (mo MapOrd[K, V]) Keys() Slice[K] { return mo.Iter().Keys().Collect() } + +// Values returns an Slice containing all the values in the ordered Map. +func (mo MapOrd[K, V]) Values() Slice[V] { return mo.Iter().Values().Collect() } + +// Delete removes the specified keys from the ordered Map. +// +// It preserves the original insertion order of the remaining elements +// and performs the deletion in a single pass with O(n) complexity. +// +// Internally, it builds a set of keys to delete and reconstructs the map +// without the removed entries. Key lookup is optimized via a map[K]int index. +// +// Example: +// +// mo.Delete("a", "b", "c") +func (mo *MapOrd[K, V]) Delete(keys ...K) { + if len(keys) == 0 || mo.Empty() { + return + } + + idx := mo.indexMap() + seen := SetOf(keys...) + nmo := make(MapOrd[K, V], 0, len(*mo)-len(keys)) + + for _, p := range *mo { + if !seen.Contains(p.Key) { + nmo = append(nmo, p) + } else { + delete(idx, p.Key) + } + } + + *mo = nmo +} + +// Eq compares the current ordered Map to another ordered Map and returns true if they are equal. +func (mo MapOrd[K, V]) Eq(other MapOrd[K, V]) bool { + if len(mo) != len(other) { + return false + } + if len(mo) == 0 { + return true + } + + idx := other.indexMap() + + var zero V + comparable := f.IsComparable(zero) + + for i, mp := range mo { + j, ok := idx[mp.Key] + if !ok || j != i { + return false + } + + value := other[j].Value + + if comparable && !f.Eq[any](value)(mp.Value) || !comparable && !f.Eqd(value)(mp.Value) { + return false + } + } + + return true +} + +// String returns a string representation of the ordered Map. +func (mo MapOrd[K, V]) String() string { + if len(mo) == 0 { + return "MapOrd{}" + } + + var b Builder + b.WriteString("MapOrd{") + + first := true + for _, pair := range mo { + if !first { + b.WriteString(", ") + } + + first = false + b.WriteString(Format("{}:{}", pair.Key, pair.Value)) + } + + b.WriteString("}") + + return b.String().Std() +} + +// Clear removes all key-value pairs from the ordered Map. +func (mo *MapOrd[K, V]) Clear() { *mo = (*mo)[:0] } + +// Contains checks if the ordered Map contains the specified key. +func (mo MapOrd[K, V]) Contains(key K) bool { return mo.index(key) != -1 } + +// Empty checks if the ordered Map is empty. +func (mo MapOrd[K, V]) Empty() bool { return len(mo) == 0 } + +// Len returns the number of key-value pairs in the ordered Map. +func (mo MapOrd[K, V]) Len() Int { return Int(len(mo)) } + +// Ne compares the current ordered Map to another ordered Map and returns true if they are not equal. +func (mo MapOrd[K, V]) Ne(other MapOrd[K, V]) bool { return !mo.Eq(other) } + +// NotEmpty checks if the ordered Map is not empty. +func (mo MapOrd[K, V]) NotEmpty() bool { return !mo.Empty() } + +// Print writes the key-value pairs of the MapOrd to the standard output (console) +// and returns the MapOrd unchanged. +func (mo MapOrd[K, V]) Print() MapOrd[K, V] { fmt.Print(mo); return mo } + +// Println writes the key-value pairs of the MapOrd to the standard output (console) with a newline +// and returns the MapOrd unchanged. +func (mo MapOrd[K, V]) Println() MapOrd[K, V] { fmt.Println(mo); return mo } + +// indexMap builds a map from keys to their corresponding indices in the MapOrd. +// +// This function is used to create a temporary indexMap that maps each key in the +// ordered map to its position (insertion order) within the slice. It is useful +// for optimizing lookup operations such as Set, Delete, Copy, or Eq. +// +// Time complexity: O(n), where n is the number of key-value pairs in the MapOrd. +func (mo MapOrd[K, V]) indexMap() map[K]int { + idx := make(map[K]int, len(mo)) + + for i, p := range mo { + idx[p.Key] = i + } + + return idx +} diff --git a/backend/vendor/github.com/enetx/g/map_ordered_entry.go b/backend/vendor/github.com/enetx/g/map_ordered_entry.go new file mode 100644 index 0000000..27be128 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/map_ordered_entry.go @@ -0,0 +1,71 @@ +package g + +import "slices" + +// Get returns Some(value) if present, otherwise None. +func (e MapOrdEntry[K, V]) Get() Option[V] { + return e.mo.Get(e.key) +} + +// OrSet inserts value if the key is vacant. +// Returns Some(existing_value) if key was present, None otherwise. +func (e MapOrdEntry[K, V]) OrSet(value V) Option[V] { + if i := e.mo.index(e.key); i != -1 { + return Some((*e.mo)[i].Value) + } + + e.mo.Set(e.key, value) + + return None[V]() +} + +// OrSetBy inserts the value produced by fn if the key is vacant. +// Returns Some(existing_value) if key was present, None otherwise. +func (e MapOrdEntry[K, V]) OrSetBy(fn func() V) Option[V] { + if i := e.mo.index(e.key); i != -1 { + return Some((*e.mo)[i].Value) + } + + e.mo.Set(e.key, fn()) + + return None[V]() +} + +// OrDefault inserts V's zero value if the key is vacant. +// Returns Some(existing_value) if key was present, None otherwise. +func (e MapOrdEntry[K, V]) OrDefault() Option[V] { + var zero V + return e.OrSet(zero) +} + +// Transform applies fn to the value if it exists. +// Returns Some(updated_value) if key was present, None otherwise. +func (e MapOrdEntry[K, V]) Transform(fn func(V) V) Option[V] { + if i := e.mo.index(e.key); i != -1 { + value := fn((*e.mo)[i].Value) + (*e.mo)[i].Value = value + + return Some(value) + } + + return None[V]() +} + +// Set sets the value for the specified key in the ordered map. +// Returns Some(previous_value) if the key existed, or None if it was newly inserted. +func (e MapOrdEntry[K, V]) Set(value V) Option[V] { + return e.mo.Set(e.key, value) +} + +// Delete removes the key from the Map. +// Returns Some(removed_value) if present, None otherwise. +func (e MapOrdEntry[K, V]) Delete() Option[V] { + if i := e.mo.index(e.key); i != -1 { + value := (*e.mo)[i].Value + *e.mo = slices.Delete(*e.mo, i, i+1) + + return Some(value) + } + + return None[V]() +} diff --git a/backend/vendor/github.com/enetx/g/map_ordered_iter.go b/backend/vendor/github.com/enetx/g/map_ordered_iter.go new file mode 100644 index 0000000..142cb8a --- /dev/null +++ b/backend/vendor/github.com/enetx/g/map_ordered_iter.go @@ -0,0 +1,549 @@ +package g + +import ( + "context" + + "github.com/enetx/g/cmp" + "github.com/enetx/iter" +) + +// Pull converts the “push-style” iterator sequence seq +// into a “pull-style” iterator accessed by the two functions +// next and stop. +// +// Next returns the next pair in the sequence +// and a boolean indicating whether the pair is valid. +// When the sequence is over, next returns a pair of zero values and false. +// It is valid to call next after reaching the end of the sequence +// or after calling stop. These calls will continue +// to return a pair of zero values and false. +// +// Stop ends the iteration. It must be called when the caller is +// no longer interested in next values and next has not yet +// signaled that the sequence is over (with a false boolean return). +// It is valid to call stop multiple times and when next has +// already returned false. +// +// It is an error to call next or stop from multiple goroutines +// simultaneously. +func (seq SeqMapOrd[K, V]) Pull() (func() (K, V, bool), func()) { + return iter.Pull2(iter.Seq2[K, V](seq)) +} + +// Keys returns an iterator containing all the keys in the ordered Map. +func (seq SeqMapOrd[K, V]) Keys() SeqSlice[K] { + return SeqSlice[K](iter.Keys(iter.Seq2[K, V](seq))) +} + +// Values returns an iterator containing all the values in the ordered Map. +func (seq SeqMapOrd[K, V]) Values() SeqSlice[V] { + return SeqSlice[V](iter.Values(iter.Seq2[K, V](seq))) +} + +// Unzip returns a tuple of slices containing keys and values from the ordered map. +func (seq SeqMapOrd[K, V]) Unzip() (SeqSlice[K], SeqSlice[V]) { return seq.Keys(), seq.Values() } + +// SortBy applies a custom sorting function to the elements in the iterator +// and returns a new iterator containing the sorted elements. +// +// The sorting function 'fn' should take two arguments, 'a' and 'b', of type Pair[K, V], +// and return true if 'a' should be ordered before 'b', and false otherwise. +// +// Example: +// +// m := g.NewMapOrd[g.Int, g.String]() +// m. +// Set(6, "bb"). +// Set(0, "dd"). +// Set(1, "aa"). +// Set(5, "xx"). +// Set(2, "cc"). +// Set(3, "ff"). +// Set(4, "zz"). +// Iter(). +// SortBy( +// func(a, b g.Pair[g.Int, g.String]) cmp.Ordering { +// return a.Key.Cmp(b.Key) +// // return a.Value.Cmp(b.Value) +// }). +// Collect(). +// Print() +// +// Output: MapOrd{0:dd, 1:aa, 2:cc, 3:ff, 4:zz, 5:xx, 6:bb} +// +// The returned iterator is of type SeqMapOrd[K, V], which implements the iterator +// interface for further iteration over the sorted elements. +func (seq SeqMapOrd[K, V]) SortBy(fn func(a, b Pair[K, V]) cmp.Ordering) SeqMapOrd[K, V] { + return SeqMapOrd[K, V]( + iter.SortBy2(iter.Seq2[K, V](seq), func(a, b iter.Pair[K, V]) bool { return fn(a, b) == cmp.Less }), + ) +} + +// SortByKey applies a custom sorting function to the keys in the iterator +// and returns a new iterator containing the sorted elements. +// +// The sorting function 'fn' should take two arguments, 'a' and 'b', of type K, +// and return true if 'a' should be ordered before 'b', and false otherwise. +// +// Example: +// +// m := g.NewMapOrd[g.Int, g.String]() +// m. +// Set(6, "bb"). +// Set(0, "dd"). +// Set(1, "aa"). +// Set(5, "xx"). +// Set(2, "cc"). +// Set(3, "ff"). +// Set(4, "zz"). +// Iter(). +// SortByKey(g.Int.Cmp). +// Collect(). +// Print() +// +// Output: MapOrd{0:dd, 1:aa, 2:cc, 3:ff, 4:zz, 5:xx, 6:bb} +func (seq SeqMapOrd[K, V]) SortByKey(fn func(a, b K) cmp.Ordering) SeqMapOrd[K, V] { + return SeqMapOrd[K, V](iter.OrderByKey(iter.Seq2[K, V](seq), func(a, b K) bool { return fn(a, b) == cmp.Less })) +} + +// SortByValue applies a custom sorting function to the values in the iterator +// and returns a new iterator containing the sorted elements. +// +// The sorting function 'fn' should take two arguments, 'a' and 'b', of type V, +// and return true if 'a' should be ordered before 'b', and false otherwise. +// +// Example: +// +// m := g.NewMapOrd[g.Int, g.String]() +// m. +// Set(6, "bb"). +// Set(0, "dd"). +// Set(1, "aa"). +// Set(5, "xx"). +// Set(2, "cc"). +// Set(3, "ff"). +// Set(4, "zz"). +// Iter(). +// SortByValue(g.String.Cmp). +// Collect(). +// Print() +// +// Output: MapOrd{1:aa, 6:bb, 2:cc, 0:dd, 3:ff, 5:xx, 4:zz} +func (seq SeqMapOrd[K, V]) SortByValue(fn func(a, b V) cmp.Ordering) SeqMapOrd[K, V] { + return SeqMapOrd[K, V](iter.OrderByValue(iter.Seq2[K, V](seq), func(a, b V) bool { return fn(a, b) == cmp.Less })) +} + +// Inspect creates a new iterator that wraps around the current iterator +// and allows inspecting each key-value pair as it passes through. +func (seq SeqMapOrd[K, V]) Inspect(fn func(k K, v V)) SeqMapOrd[K, V] { + return SeqMapOrd[K, V](iter.Inspect2(iter.Seq2[K, V](seq), fn)) +} + +// StepBy creates a new iterator that iterates over every N-th element of the original iterator. +// This function is useful when you want to skip a specific number of elements between each iteration. +// +// Parameters: +// - n int: The step size, indicating how many elements to skip between each iteration. +// +// Returns: +// - SeqMapOrd[K, V]: A new iterator that produces key-value pairs from the original iterator with a step size of N. +// +// Example usage: +// +// mapIter := g.MapOrd[string, int]{{"one", 1}, {"two", 2}, {"three", 3}}.Iter() +// iter := mapIter.StepBy(2) +// result := iter.Collect() +// result.Print() +// +// Output: MapOrd{one:1, three:3} +// +// The resulting iterator will produce key-value pairs from the original iterator with a step size of N. +func (seq SeqMapOrd[K, V]) StepBy(n uint) SeqMapOrd[K, V] { + return SeqMapOrd[K, V](iter.StepBy2(iter.Seq2[K, V](seq), int(n))) +} + +// Chain concatenates the current iterator with other iterators, returning a new iterator. +// +// The function creates a new iterator that combines the elements of the current iterator +// with elements from the provided iterators in the order they are given. +// +// Params: +// +// - seqs ([]seqMapOrd[K, V]): Other iterators to be concatenated with the current iterator. +// +// Returns: +// +// - SeqMapOrd[K, V]: A new iterator containing elements from the current iterator and the provided iterators. +// +// Example usage: +// +// iter1 := g.NewMapOrd[int, string]() +// iter1.Set(1, "a").Iter() +// +// iter2 := g.NewMapOrd[int, string]() +// iter2.Set(2, "b").Iter() +// +// // Concatenating iterators and collecting the result. +// iter1.Chain(iter2).Collect().Print() +// +// Output: MapOrd{1:a, 2:b} +// +// The resulting iterator will contain elements from both iterators in the specified order. +func (seq SeqMapOrd[K, V]) Chain(seqs ...SeqMapOrd[K, V]) SeqMapOrd[K, V] { + iterSeqs := make([]iter.Seq2[K, V], len(seqs)) + for i, s := range seqs { + iterSeqs[i] = iter.Seq2[K, V](s) + } + + return SeqMapOrd[K, V](iter.Chain2(iter.Seq2[K, V](seq), iterSeqs...)) +} + +// Count consumes the iterator, counting the number of iterations and returning it. +func (seq SeqMapOrd[K, V]) Count() Int { return Int(iter.Count2(iter.Seq2[K, V](seq))) } + +// Collect collects all key-value pairs from the iterator and returns a MapOrd. +func (seq SeqMapOrd[K, V]) Collect() MapOrd[K, V] { + collection := NewMapOrd[K, V]() + + seq(func(k K, v V) bool { + collection.Set(k, v) + return true + }) + + return collection +} + +// Skip returns a new iterator skipping the first n elements. +// +// The function creates a new iterator that skips the first n elements of the current iterator +// and returns an iterator starting from the (n+1)th element. +// +// Params: +// +// - n (uint): The number of elements to skip from the beginning of the iterator. +// +// Returns: +// +// - SeqMapOrd[K, V]: An iterator that starts after skipping the first n elements. +// +// Example usage: +// + +// iter := g.NewMapOrd[int, string]() +// iter. +// Set(1, "a"). +// Set(2, "b"). +// Set(3, "c"). +// Set(4, "d"). +// Iter() +// +// // Skipping the first two elements and collecting the rest. +// iter.Skip(2).Collect().Print() +// +// Output: MapOrd{3:c, 4:d} +// +// The resulting iterator will start after skipping the specified number of elements. +func (seq SeqMapOrd[K, V]) Skip(n uint) SeqMapOrd[K, V] { + return SeqMapOrd[K, V](iter.Skip2(iter.Seq2[K, V](seq), int(n))) +} + +// Exclude returns a new iterator excluding elements that satisfy the provided function. +// +// The function creates a new iterator excluding elements from the current iterator +// for which the provided function returns true. +// +// Params: +// +// - fn (func(K, V) bool): The function used to determine exclusion criteria for elements. +// +// Returns: +// +// - SeqMapOrd[K, V]: A new iterator excluding elements that satisfy the given condition. +// +// Example usage: +// +// mo := g.NewMapOrd[int, int]() +// mo. +// Set(1, 1). +// Set(2, 2). +// Set(3, 3). +// Set(4, 4). +// Set(5, 5) +// +// notEven := mo.Iter(). +// Exclude( +// func(k, v int) bool { +// return v%2 == 0 +// }). +// Collect() +// notEven.Print() +// +// Output: MapOrd{1:1, 3:3, 5:5} +// +// The resulting iterator will exclude elements based on the provided condition. +func (seq SeqMapOrd[K, V]) Exclude(fn func(K, V) bool) SeqMapOrd[K, V] { + return SeqMapOrd[K, V](iter.Exclude2(iter.Seq2[K, V](seq), fn)) +} + +// Filter returns a new iterator containing only the elements that satisfy the provided function. +// +// The function creates a new iterator including elements from the current iterator +// for which the provided function returns true. +// +// Params: +// +// - fn (func(K, V) bool): The function used to determine inclusion criteria for elements. +// +// Returns: +// +// - SeqMapOrd[K, V]: A new iterator containing elements that satisfy the given condition. +// +// Example usage: +// +// mo := g.NewMapOrd[int, int]() +// mo. +// Set(1, 1). +// Set(2, 2). +// Set(3, 3). +// Set(4, 4). +// Set(5, 5) +// +// even := mo.Iter(). +// Filter( +// func(k, v int) bool { +// return v%2 == 0 +// }). +// Collect() +// even.Print() +// +// Output: MapOrd{2:2, 4:4} +// +// The resulting iterator will include elements based on the provided condition. +func (seq SeqMapOrd[K, V]) Filter(fn func(K, V) bool) SeqMapOrd[K, V] { + return SeqMapOrd[K, V](iter.Filter2(iter.Seq2[K, V](seq), fn)) +} + +// Find searches for an element in the iterator that satisfies the provided function. +// +// The function iterates through the elements of the iterator and returns the first element +// for which the provided function returns true. +// +// Params: +// +// - fn (func(K, V) bool): The function used to test elements for a condition. +// +// Returns: +// +// - Option[K, V]: An Option containing the first element that satisfies the condition; None if not found. +// +// Example usage: +// +// m := g.NewMapOrd[int, int]() +// m.Set(1, 1) +// f := m.Iter().Find(func(_ int, v int) bool { return v == 1 }) +// if f.IsSome() { +// print(f.Some().Key) +// } +// +// The resulting Option may contain the first element that satisfies the condition, or None if not found. +func (seq SeqMapOrd[K, V]) Find(fn func(k K, v V) bool) Option[Pair[K, V]] { + key, value, found := iter.Find2(iter.Seq2[K, V](seq), fn) + if found { + return Some(Pair[K, V]{Key: key, Value: value}) + } + + return None[Pair[K, V]]() +} + +// ForEach iterates through all elements and applies the given function to each key-value pair. +// +// The function applies the provided function to each key-value pair in the iterator. +// +// Params: +// +// - fn (func(K, V)): The function to be applied to each key-value pair in the iterator. +// +// Example usage: +// +// iter := g.NewMapOrd[int, int]() +// iter. +// Set(1, 1). +// Set(2, 2). +// Set(3, 3). +// Set(4, 4). +// Set(5, 5). +// Iter() +// +// iter.ForEach(func(key K, val V) { +// // Process key-value pair +// }) +// +// The provided function will be applied to each key-value pair in the iterator. +func (seq SeqMapOrd[K, V]) ForEach(fn func(k K, v V)) { + iter.ForEach2(iter.Seq2[K, V](seq), fn) +} + +// Map creates a new iterator by applying the given function to each key-value pair. +// +// The function creates a new iterator by applying the provided function to each key-value pair in the iterator. +// +// Params: +// +// - fn (func(K, V) (K, V)): The function used to transform each key-value pair in the iterator. +// +// Returns: +// +// - SeqMapOrd[K, V]: A new iterator containing transformed key-value pairs. +// +// Example usage: +// +// mo := g.NewMapOrd[int, int]() +// mo. +// Set(1, 1). +// Set(2, 2). +// Set(3, 3). +// Set(4, 4). +// Set(5, 5) +// +// momap := mo.Iter(). +// Map( +// func(k, v int) (int, int) { +// return k * k, v * v +// }). +// Collect() +// +// momap.Print() +// +// Output: MapOrd{1:1, 4:4, 9:9, 16:16, 25:25} +// +// The resulting iterator will contain transformed key-value pairs. +func (seq SeqMapOrd[K, V]) Map(transform func(K, V) (K, V)) SeqMapOrd[K, V] { + return SeqMapOrd[K, V](iter.Map2(iter.Seq2[K, V](seq), transform)) +} + +// Range iterates through elements until the given function returns false. +// +// The function iterates through the key-value pairs in the iterator, applying the provided function to each pair. +// It continues iterating until the function returns false. +// +// Params: +// +// - fn (func(K, V) bool): The function to be applied to each key-value pair in the iterator. +// +// Example usage: +// +// iter := g.NewMapOrd[int, int]() +// iter. +// Set(1, 1). +// Set(2, 2). +// Set(3, 3). +// Set(4, 4). +// Set(5, 5). +// Iter() +// +// iter.Range(func(k, v int) bool { +// fmt.Println(v) // Replace this with the function logic you need. +// return v < 5 // Replace this with the condition for continuing iteration. +// }) +// +// The iteration will stop when the provided function returns false. +func (seq SeqMapOrd[K, V]) Range(fn func(k K, v V) bool) { + iter.Range2(iter.Seq2[K, V](seq), fn) +} + +// Context allows the iteration to be controlled with a context.Context. +func (seq SeqMapOrd[K, V]) Context(ctx context.Context) SeqMapOrd[K, V] { + return SeqMapOrd[K, V](iter.Context2(iter.Seq2[K, V](seq), ctx)) +} + +// Take returns a new iterator with the first n elements. +// The function creates a new iterator containing the first n elements from the original iterator. +func (seq SeqMapOrd[K, V]) Take(n uint) SeqMapOrd[K, V] { + return SeqMapOrd[K, V](iter.Take2(iter.Seq2[K, V](seq), int(n))) +} + +// First returns the first key-value pair from the sequence. +func (seq SeqMapOrd[K, V]) First() Option[Pair[K, V]] { + if key, value, ok := iter.First2(iter.Seq2[K, V](seq)); ok { + return Some(Pair[K, V]{Key: key, Value: value}) + } + + return None[Pair[K, V]]() +} + +// Last returns the last key-value pair from the sequence. +func (seq SeqMapOrd[K, V]) Last() Option[Pair[K, V]] { + if key, value, ok := iter.Last2(iter.Seq2[K, V](seq)); ok { + return Some(Pair[K, V]{Key: key, Value: value}) + } + + return None[Pair[K, V]]() +} + +// Nth returns the nth key-value pair (0-indexed) in the sequence. +func (seq SeqMapOrd[K, V]) Nth(n Int) Option[Pair[K, V]] { + key, value, found := iter.Nth2(iter.Seq2[K, V](seq), int(n)) + if found { + return Some(Pair[K, V]{Key: key, Value: value}) + } + + return None[Pair[K, V]]() +} + +// ToChan converts the iterator into a channel, optionally with context(s). +// +// The function converts the key-value pairs from the iterator into a channel, allowing iterative processing +// using channels. It can be used to stream key-value pairs for concurrent or asynchronous operations. +// +// Params: +// +// - ctxs (...context.Context): Optional context(s) that can be used to cancel or set deadlines for the operation. +// +// Returns: +// +// - chan Pair[K, V]: A channel emitting key-value pairs from the iterator. +// +// Example usage: +// +// iter := g.NewMapOrd[int, int]() +// iter. +// Set(1, 1). +// Set(2, 2). +// Set(3, 3). +// Set(4, 4). +// Set(5, 5). +// Iter() +// +// ctx, cancel := context.WithCancel(context.Background()) +// defer cancel() // Ensure cancellation to avoid goroutine leaks. +// +// ch := iter.ToChan(ctx) +// for pair := range ch { +// // Process key-value pair from the channel +// } +// +// The function converts the iterator into a channel to allow sequential or concurrent processing of key-value pairs. +func (seq SeqMapOrd[K, V]) ToChan(ctxs ...context.Context) chan Pair[K, V] { + ctx := context.Background() + if len(ctxs) > 0 { + ctx = ctxs[0] + } + + return iter.ToChan2(iter.Seq2[K, V](seq), ctx) +} + +// Next extracts the next key-value pair from the iterator and advances it. +// +// This method consumes the next key-value pair from the iterator and returns them wrapped in an Option. +// The iterator itself is modified to point to the remaining elements. +// +// Returns: +// - Option[Pair[K, V]]: Some(Pair{Key, Value}) if a pair exists, None if the iterator is exhausted. +func (seq *SeqMapOrd[K, V]) Next() Option[Pair[K, V]] { + if key, value, remaining, ok := iter.Next2(iter.Seq2[K, V](*seq)); ok { + *seq = SeqMapOrd[K, V](remaining) + return Some(Pair[K, V]{Key: key, Value: value}) + } + + return None[Pair[K, V]]() +} diff --git a/backend/vendor/github.com/enetx/g/map_safe.go b/backend/vendor/github.com/enetx/g/map_safe.go new file mode 100644 index 0000000..eb333e3 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/map_safe.go @@ -0,0 +1,218 @@ +package g + +import ( + "fmt" + + "github.com/enetx/g/f" +) + +// NewMapSafe creates a new instance of MapSafe. +func NewMapSafe[K comparable, V any]() *MapSafe[K, V] { return &MapSafe[K, V]{} } + +// Iter provides a thread-safe iterator over the MapSafe's key-value pairs. +func (ms *MapSafe[K, V]) Iter() SeqMap[K, V] { + return func(yield func(K, V) bool) { + ms.data.Range(func(key, value any) bool { + return yield(key.(K), *(value.(*V))) + }) + } +} + +// Entry returns a MapSafeEntry for a given key, allowing for more complex atomic operations. +func (ms *MapSafe[K, V]) Entry(key K) MapSafeEntry[K, V] { + return MapSafeEntry[K, V]{m: ms, key: key} +} + +// Keys returns a slice of the MapSafe's keys. +func (ms *MapSafe[K, V]) Keys() Slice[K] { + var keys Slice[K] + + ms.data.Range(func(key, _ any) bool { + keys = append(keys, key.(K)) + return true + }) + + return keys +} + +// Values returns a slice of the MapSafe's values. +func (ms *MapSafe[K, V]) Values() Slice[V] { + var values Slice[V] + + ms.data.Range(func(_, value any) bool { + values = append(values, *(value.(*V))) + return true + }) + + return values +} + +// Invert inverts keys and values. The new map will also follow the pointer-storage rule. +func (ms *MapSafe[K, V]) Invert() *MapSafe[any, K] { + res := NewMapSafe[any, K]() + + ms.data.Range(func(key, value any) bool { + k := key.(K) + res.data.Store(*(value.(*V)), &k) + return true + }) + + return res +} + +// Contains checks if the MapSafe contains the specified key. +func (ms *MapSafe[K, V]) Contains(key K) bool { + _, ok := ms.data.Load(key) + return ok +} + +// Clone creates a deep copy of the MapSafe. +func (ms *MapSafe[K, V]) Clone() *MapSafe[K, V] { + res := NewMapSafe[K, V]() + + ms.data.Range(func(key, value any) bool { + v := *(value.(*V)) + res.data.Store(key, &v) + return true + }) + + return res +} + +// Copy performs a deep copy of the source MapSafe's pairs into the current map. +func (ms *MapSafe[K, V]) Copy(src *MapSafe[K, V]) { + src.data.Range(func(key, value any) bool { + v := *(value.(*V)) + ms.data.Store(key, &v) + return true + }) +} + +// Delete removes the specified keys from the MapSafe. +func (ms *MapSafe[K, V]) Delete(keys ...K) { + for _, k := range keys { + ms.data.Delete(k) + } +} + +// Eq checks if two MapSafes are equal by deep-comparing their values. +func (ms *MapSafe[K, V]) Eq(other *MapSafe[K, V]) bool { + n := ms.Len() + if n != other.Len() { + return false + } + + if n == 0 { + return true + } + + var zero V + comparable := f.IsComparable(zero) + + equal := true + + ms.data.Range(func(key, value any) bool { + ovalue, ok := other.data.Load(key) + if !ok { + equal = false + return false + } + + v1 := *(value.(*V)) + v2 := *(ovalue.(*V)) + + if comparable && !f.Eq[any](v1)(v2) || !comparable && !f.Eqd(v1)(v2) { + equal = false + return false + } + + return true + }) + + return equal +} + +// Get retrieves the value associated with the given key. +func (ms *MapSafe[K, V]) Get(key K) Option[V] { + if value, ok := ms.data.Load(key); ok { + return Some(*(value.(*V))) + } + + return None[V]() +} + +// Set stores the value for the given key, returning the previous value if it existed. +func (ms *MapSafe[K, V]) Set(key K, value V) Option[V] { + if previous, loaded := ms.data.Swap(key, &value); loaded { + return Some(*(previous.(*V))) + } + + return None[V]() +} + +// Len returns the number of key-value pairs in the MapSafe. +func (ms *MapSafe[K, V]) Len() int { + count := 0 + + ms.data.Range(func(_, _ any) bool { + count++ + return true + }) + + return count +} + +// Ne checks if two MapSafes are not equal. +func (ms *MapSafe[K, V]) Ne(other *MapSafe[K, V]) bool { return !ms.Eq(other) } + +// NotEmpty checks if the MapSafe is not empty. +func (ms *MapSafe[K, V]) NotEmpty() bool { return !ms.Empty() } + +// Clear removes all key-value pairs from the MapSafe. +func (ms *MapSafe[K, V]) Clear() { ms.data.Clear() } + +// Empty checks if the MapSafe is empty. +func (ms *MapSafe[K, V]) Empty() bool { + empty := true + + ms.data.Range(func(_, _ any) bool { + empty = false + return false + }) + + return empty +} + +// String returns a string representation of the MapSafe. +func (ms *MapSafe[K, V]) String() string { + var b Builder + b.WriteString("MapSafe{") + + first := true + + ms.data.Range(func(key, value any) bool { + if !first { + b.WriteString(", ") + } + + first = false + + if vptr, ok := value.(*V); ok && vptr != nil { + b.WriteString(Format("{}:{}", key, *vptr)) + } else { + b.WriteString(Format("{}:", key)) + } + + return true + }) + + b.WriteString("}") + + return b.String().Std() +} + +// Print writes the MapSafe to standard output. +func (ms *MapSafe[K, V]) Print() *MapSafe[K, V] { fmt.Print(ms); return ms } + +// Println writes the MapSafe to standard output with a newline. +func (ms *MapSafe[K, V]) Println() *MapSafe[K, V] { fmt.Println(ms); return ms } diff --git a/backend/vendor/github.com/enetx/g/map_safe_entry.go b/backend/vendor/github.com/enetx/g/map_safe_entry.go new file mode 100644 index 0000000..b10f71a --- /dev/null +++ b/backend/vendor/github.com/enetx/g/map_safe_entry.go @@ -0,0 +1,76 @@ +package g + +import "github.com/enetx/g/ref" + +// Get returns Some(value) if the key exists, otherwise None. +func (e MapSafeEntry[K, V]) Get() Option[V] { + return e.m.Get(e.key) +} + +// Set unconditionally sets the value for the key. +// Returns Some(old_value) if the key was already present, otherwise None. +func (e MapSafeEntry[K, V]) Set(value V) Option[V] { + return e.m.Set(e.key, value) +} + +// Delete atomically retrieves and removes the value for the key from the map. +// Returns Some(value) if it existed, otherwise None. +func (e MapSafeEntry[K, V]) Delete() Option[V] { + if value, loaded := e.m.data.LoadAndDelete(e.key); loaded { + return Some(*(value.(*V))) + } + + return None[V]() +} + +// OrSet inserts `value` if the key is vacant. +// Returns the value that is in the map after the operation (either the old or the new one). +func (e MapSafeEntry[K, V]) OrSet(value V) Option[V] { + actual, loaded := e.m.data.LoadOrStore(e.key, &value) + if loaded { + return Some(*(actual.(*V))) + } + + return None[V]() +} + +// OrSetBy inserts the value produced by `fn` if the key is vacant. `fn` is only called if needed. +// Returns the value that is in the map after the operation. +func (e MapSafeEntry[K, V]) OrSetBy(fn func() V) Option[V] { + if actual, loaded := e.m.data.Load(e.key); loaded { + return Some(*(actual.(*V))) + } + + if actual, loaded := e.m.data.LoadOrStore(e.key, ref.Of(fn())); loaded { + return Some(*(actual.(*V))) + } + + return None[V]() +} + +// OrDefault inserts V's zero value if the key is vacant. +// Returns the value that is in the map after the operation. +func (e MapSafeEntry[K, V]) OrDefault() Option[V] { + var zero V + return e.OrSet(zero) +} + +// Transform atomically applies `fn` to the existing value if present. +// The function `fn` takes the old value and returns the new value. +// This operation is implemented using a lock-free Compare-And-Swap (CAS) loop. +// Returns Some(updated_value) if successful, or None if the key was missing. +func (e MapSafeEntry[K, V]) Transform(fn func(V) V) Option[V] { + for { + avalue, ok := e.m.data.Load(e.key) + if !ok { + return None[V]() + } + + ovalue := avalue.(*V) + nvalue := fn(*ovalue) + + if e.m.data.CompareAndSwap(e.key, ovalue, &nvalue) { + return Some(nvalue) + } + } +} diff --git a/backend/vendor/github.com/enetx/g/option.go b/backend/vendor/github.com/enetx/g/option.go new file mode 100644 index 0000000..663ce46 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/option.go @@ -0,0 +1,142 @@ +package g + +import ( + "fmt" + "os" + "path/filepath" + "runtime" +) + +// Some creates an Option containing a value. +func Some[T any](value T) Option[T] { return Option[T]{v: value, isSome: true} } + +// None creates an Option representing no value. +func None[T any]() Option[T] { return Option[T]{isSome: false} } + +// OptionOf creates an Option[T] based on the provided value and a boolean flag. +// If ok is true, it returns Some(value). +// Otherwise, it returns None. +func OptionOf[T any](value T, ok bool) Option[T] { + if ok { + return Some(value) + } + + return None[T]() +} + +// TransformOption applies the given function to the value inside the Option, producing a new Option with the transformed value. +// If the input Option is None, the output Option will also be None. +// Parameters: +// - o: The input Option to map over. +// - fn: The function that returns an Option to apply to the value inside the Option. +// +// Returns: +// +// A new Option with the transformed value, or None if the input was None. +func TransformOption[T, U any](o Option[T], fn func(T) Option[U]) Option[U] { + if o.isSome { + return fn(o.v) + } + + return None[U]() +} + +// Some returns the contained value of the Option. +// +// WARNING: If the Option is None, this method will return the zero value +// for type T. Always check IsSome() before calling this method, or use safer alternatives +// like Unwrap(), or UnwrapOr(). +func (o Option[T]) Some() T { return o.v } + +// IsSome returns true if the Option contains a value. +func (o Option[T]) IsSome() bool { return o.isSome } + +// IsNone returns true if the Option represents no value. +func (o Option[T]) IsNone() bool { return !o.isSome } + +// Unwrap returns the value held in the Option. If the Option is None, it panics. +func (o Option[T]) Unwrap() T { + if o.isSome { + return o.v + } + + const panicMsg = "called Option.Unwrap() on a None value" + + if pc, file, line, ok := runtime.Caller(1); ok { + out := fmt.Sprintf("[%s:%d] [%s] %s", filepath.Base(file), line, runtime.FuncForPC(pc).Name(), panicMsg) + fmt.Fprintln(os.Stderr, out) + } + + panic(panicMsg) +} + +// UnwrapOr returns the value held in the Option. If the Option is None, it returns the provided default value. +func (o Option[T]) UnwrapOr(value T) T { + if o.isSome { + return o.v + } + + return value +} + +// UnwrapOrDefault returns the contained value if Some; otherwise returns the zero value for T. +func (o Option[T]) UnwrapOrDefault() T { + if o.isSome { + return o.v + } + + var zero T + return zero +} + +// Expect returns the value held in the Option. If the Option is None, it panics with the provided message. +func (o Option[T]) Expect(msg string) T { + if o.isSome { + return o.v + } + + out := fmt.Sprintf("Expect() failed: %s", msg) + fmt.Fprintln(os.Stderr, out) + panic(out) +} + +// Then applies the function fn to the value inside the Option and returns a new Option. +// If the Option is None, it returns the same Option without applying fn. +func (o Option[T]) Then(fn func(T) Option[T]) Option[T] { + if o.isSome { + return fn(o.v) + } + + return o +} + +// Result converts an Option into a Result. +// If the Option is Some, it returns an Ok Result with the value. +// If the Option is None, it returns an Err Result with the provided error. +func (o Option[T]) Result(err error) Result[T] { + if o.isSome { + return Ok(o.v) + } + + return Err[T](err) +} + +func (o Option[T]) Option() (T, bool) { + if o.IsSome() { + return o.Some(), true + } + + var zero T + return zero, false +} + +// String returns a string representation of the Option. +// If the Option contains a value, it returns a string in the format "Some(value)". +// Otherwise, it returns "None". +func (o Option[T]) String() string { + if o.isSome { + return fmt.Sprintf("Some(%v)", o.v) + } + + return "None" +} diff --git a/backend/vendor/github.com/enetx/g/print.go b/backend/vendor/github.com/enetx/g/print.go new file mode 100644 index 0000000..d81f2fe --- /dev/null +++ b/backend/vendor/github.com/enetx/g/print.go @@ -0,0 +1,518 @@ +package g + +import ( + "errors" + "fmt" + "io" + "os" + "reflect" + "strconv" + + "github.com/enetx/g/f" +) + +// Write formats according to a format specifier and writes to w. +// It returns a Result containing the number of bytes written or an error. +// +// Example: +// +// res := g.Write(os.Stdout, "Hello, {}!\n", "world") +// if res.IsErr() { log.Fatal(res.Err()) } +func Write[T ~string](w io.Writer, format T, args ...any) Result[int] { + return ResultOf(io.WriteString(w, Format(format, args...).Std())) +} + +// Writeln formats according to a format specifier, appends a newline, and writes to w. +// It returns a Result containing the number of bytes written or an error. +// +// Example: +// +// res := g.Writeln(os.Stdout, "Hello, {}", "world") +// if res.IsErr() { log.Fatal(res.Err()) } +func Writeln[T ~string](w io.Writer, format T, args ...any) Result[int] { + return ResultOf(io.WriteString(w, Format(format, args...).Append("\n").Std())) +} + +// Print formats according to a format specifier and writes to os.Stdout. +// It returns a Result containing the number of bytes written or an error. +// +// Example: +// +// g.Print("Hello, {}!\n", "world") +func Print[T ~string](format T, args ...any) Result[int] { + return Write(os.Stdout, format, args...) +} + +// Println formats according to a format specifier, appends a newline, and writes to os.Stdout. +// It returns a Result containing the number of bytes written or an error. +// +// Example: +// +// g.Println("Hello, {}", "world") +func Println[T ~string](format T, args ...any) Result[int] { + return Writeln(os.Stdout, format, args...) +} + +// Eprint formats according to a format specifier and writes to os.Stderr. +// It returns a Result containing the number of bytes written or an error. +// +// Example: +// +// g.Eprint("Error: {}", "file not found") +func Eprint[T ~string](format T, args ...any) Result[int] { + return Write(os.Stderr, format, args...) +} + +// Eprintln formats according to a format specifier, appends a newline, and writes to os.Stderr. +// It returns a Result containing the number of bytes written or an error. +// +// Example: +// +// g.Eprintln("Error: {}", "permission denied") +func Eprintln[T ~string](format T, args ...any) Result[int] { + return Writeln(os.Stderr, format, args...) +} + +// Errorf formats according to a format specifier and returns it as an error. +// +// Example: +// +// err := g.Errorf("could not open {}: {}", filename, err) +// if err != nil { /* ... */ } +func Errorf[T ~string](format T, args ...any) error { + return errors.New(Format(format, args...).Std()) +} + +// Format processes a template string and replaces placeholders with corresponding values from the provided arguments. +// It supports numeric, named, and auto-indexed placeholders, as well as dynamic invocation of methods on values. +// +// If a placeholder cannot resolve a value or an invoked method fails, the placeholder remains unchanged in the output. +// +// Parameters: +// - template (T ~string): A string containing placeholders enclosed in `{}`. +// - args (...any): A variadic list of arguments, which may include: +// - Positional arguments (numbers, strings, slices, structs, maps, etc.). +// - A `Named` map for named placeholders. +// +// Placeholder Forms: +// - Numeric: `{1}`, `{2}` - References positional arguments by their 1-based index. +// - Named: `{key}`, `{key.MethodName(param1, param2)}` - References keys from a `Named` map and allows method invocation. +// - Fallback: `{key?fallback}` - Uses `fallback` if the key is not found in the named map. +// - Auto-index: `{}` - Automatically uses the next positional argument if the placeholder is empty. +// - Escaping: `\{` and `\}` - Escapes literal braces in the template string. +// +// Returns: +// - String: A formatted string with all resolved placeholders replaced by their corresponding values. +// +// Notes: +// - If a placeholder cannot resolve a value (e.g., missing key or out-of-range index), it remains unchanged in the output. +// - Method invocation supports any type with accessible methods. If the method or its parameters are invalid, the value remains unmodified. +// +// Usage: +// +// // Example 1: Numeric placeholders +// result := g.Format("{1} + {2} = {3}", 1, 2, 3) +// +// // Example 2: Named placeholders +// named := g.Named{ +// "name": "Alice", +// "age": 30, +// } +// result := g.Format("My name is {name} and I am {age} years old.", named) +// +// // Example 3: Method invocation on values +// result := g.Format("Hex: {1.Hex}, Binary: {1.Binary}", g.Int(255)) +// +// // Example 4: Fallbacks and chaining +// named := g.Named{ +// "name": g.String(" john "), +// "city": g.String("New York"), +// } +// result := g.Format("Hello, {name.Trim.Title}. Welcome to {city?Unknown}!", named) +func Format[T ~string](template T, args ...any) String { + tmpl := String(template) + + var ( + named Named + positional Slice[any] + ) + + for _, arg := range args { + switch x := arg.(type) { + case Named: + named = x + case nil: + positional = append(positional, "") + default: + positional = append(positional, x) + } + } + + return parseTmpl(tmpl, named, positional) +} + +func parseTmpl(tmpl String, named Named, positional Slice[any]) String { + var builder Builder + length := tmpl.Len() + builder.Grow(length) + + var autoidx, idx Int + + for idx < length { + char := tmpl[idx] + if char == '\\' && idx+1 < length { + next := tmpl[idx+1] + if next == '{' || next == '}' { + builder.WriteByte(next) + idx += 2 + + continue + } + } + + if char == '{' { + cidx := tmpl[idx+1:].Index("}") + if cidx.IsNegative() { + builder.WriteByte(char) + idx++ + + continue + } + + eidx := idx + 1 + cidx + placeholder := tmpl[idx+1 : eidx] + + trimmed := placeholder.Trim() + if trimmed.Empty() || trimmed[0] == '.' { + autoidx++ + if autoidx <= positional.Len() { + placeholder = autoidx.String() + trimmed + } + } + + replaced := processPlaceholder(placeholder, named, positional) + builder.WriteString(replaced) + + idx = eidx + 1 + } else { + builder.WriteByte(tmpl[idx]) + idx++ + } + } + + return builder.String() +} + +func processPlaceholder(placeholder String, named Named, positional Slice[any]) String { + var ( + keyfall String + mods String + key String + fall String + ) + + if idx := placeholder.Index("."); idx.IsPositive() { + keyfall = placeholder[:idx] + mods = placeholder[idx+1:] + } else { + keyfall = placeholder + } + + if idx := keyfall.Index("?"); idx.IsPositive() { + key = keyfall[:idx] + fall = keyfall[idx+1:] + } else { + key = keyfall + } + + value := resolveValue(key, fall, named, positional) + if value == nil { + return "{" + placeholder + "}" + } + + if mods.NotEmpty() { + mods. + Split("."). + Exclude(f.IsZero). + ForEach(func(segment String) { + name, params := parseMod(segment) + value = applyMod(value, name, params) + }) + } + + return String(fmt.Sprint(value)) +} + +func resolveValue(key, fall String, named Named, positional Slice[any]) any { + if num := key.ToInt(); num.IsOk() { + idx := num.v - 1 + if idx.IsNegative() || idx.Gte(positional.Len()) { + return nil + } + + return positional[idx] + } + + value := Map[String, any](named).Get(key) + if value.IsNone() && fall.NotEmpty() { + value = Map[String, any](named).Get(fall) + } + + return value.UnwrapOrDefault() +} + +func parseMod(segment String) (String, Slice[String]) { + oidx := segment.Index("(") + if oidx.IsNegative() { + return segment, nil + } + + cidx := segment.LastIndex(")") + if cidx.Lt(oidx) { + return segment, nil + } + + params := segment[oidx+1 : cidx].Split(",").Collect() + name := segment[:oidx] + + return name, params +} + +func toType(param String, targetType reflect.Type) Result[reflect.Value] { + switch targetType.Kind() { + case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: + i64, err := strconv.ParseInt(param.Std(), 10, targetType.Bits()) + if err != nil { + return Err[reflect.Value](err) + } + return Ok(reflect.ValueOf(i64).Convert(targetType)) + case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64: + u64, err := strconv.ParseUint(param.Std(), 10, targetType.Bits()) + if err != nil { + return Err[reflect.Value](err) + } + return Ok(reflect.ValueOf(u64).Convert(targetType)) + case reflect.Bool: + b, err := strconv.ParseBool(param.Std()) + if err != nil { + return Err[reflect.Value](err) + } + return Ok(reflect.ValueOf(b)) + case reflect.Float32, reflect.Float64: + param = param.ReplaceAll("_", ".") + fl, err := strconv.ParseFloat(param.Std(), targetType.Bits()) + if err != nil { + return Err[reflect.Value](err) + } + return Ok(reflect.ValueOf(fl).Convert(targetType)) + default: + switch targetType { + case reflect.TypeOf(""): + return Ok(reflect.ValueOf(param.Std())) + case reflect.TypeOf(String("")): + return Ok(reflect.ValueOf(param)) + default: + return Err[reflect.Value](fmt.Errorf("unsupported type: %s", targetType)) + } + } +} + +func extractFromMapOrd(param String, slice reflect.Value) Option[any] { + for slice.Kind() == reflect.Interface || slice.Kind() == reflect.Pointer { + if slice.IsNil() { + return None[any]() + } + slice = slice.Elem() + } + + if !slice.IsValid() || slice.Kind() != reflect.Slice { + return None[any]() + } + + elemT := slice.Type().Elem() + if elemT.Kind() != reflect.Struct { + return None[any]() + } + + if _, ok := elemT.FieldByName("Key"); !ok { + return None[any]() + } + + if _, ok := elemT.FieldByName("Value"); !ok { + return None[any]() + } + + ps := param.Std() + + var ( + pi int + pierr error + pf float64 + pferr error + ) + + for i := 0; i < slice.Len(); i++ { + el := slice.Index(i) + k := el.FieldByName("Key").Interface() + v := el.FieldByName("Value").Interface() + + switch kk := k.(type) { + case string: + if kk == ps { + return Some(v) + } + case String: + if string(kk) == ps { + return Some(v) + } + case int: + if pi == 0 && pierr == nil { + pi, pierr = strconv.Atoi(ps) + } + if pierr == nil && kk == pi { + return Some(v) + } + case Int: + if pi == 0 && pierr == nil { + pi, pierr = strconv.Atoi(ps) + } + if pierr == nil && int(kk) == pi { + return Some(v) + } + case float64: + if pf == 0 && pferr == nil { + pf, pferr = strconv.ParseFloat(param.ReplaceAll("_", ".").Std(), 64) + } + if pferr == nil && kk == pf { + return Some(v) + } + case Float: + if pf == 0 && pferr == nil { + pf, pferr = strconv.ParseFloat(param.ReplaceAll("_", ".").Std(), 64) + } + if pferr == nil && float64(kk) == pf { + return Some(v) + } + default: + if s, ok := k.(fmt.Stringer); ok && s.String() == ps { + return Some(v) + } + } + } + + return None[any]() +} + +func resolveIndirect(targetType reflect.Value) reflect.Value { + for targetType.Kind() == reflect.Interface || targetType.Kind() == reflect.Pointer { + if targetType.IsNil() { + return reflect.Value{} + } + + targetType = targetType.Elem() + } + + return targetType +} + +func callMethod(method reflect.Value, params Slice[String]) Option[any] { + methodType := method.Type() + numIn := methodType.NumIn() + isVariadic := methodType.IsVariadic() + + if isVariadic { + numIn-- + } + + var args []reflect.Value + + for i := range numIn { + arg := toType(params[i], methodType.In(i)) + if arg.IsErr() { + return None[any]() + } + + args = append(args, arg.v) + } + + if isVariadic { + elemType := methodType.In(numIn).Elem() + for _, param := range params[numIn:] { + arg := toType(param, elemType) + if arg.IsErr() { + return None[any]() + } + + args = append(args, arg.v) + } + } + + results := method.Call(args) + + if len(results) > 0 { + return Some(results[0].Interface()) + } + + return None[any]() +} + +func applyMod(value any, name String, params Slice[String]) any { + switch name { + case "type": + return fmt.Sprintf("%T", value) + case "debug": + return fmt.Sprintf("%#v", value) + } + + current := reflect.ValueOf(value) + + if method := current.MethodByName(name.Std()); method.IsValid() && method.Kind() == reflect.Func { + if result := callMethod(method, params); result.IsSome() { + return result.v + } + return value + } + + for current.Kind() == reflect.Pointer || current.Kind() == reflect.Interface { + if current.IsNil() { + return value + } + current = current.Elem() + } + + if method := current.MethodByName(name.Std()); method.IsValid() && method.Kind() == reflect.Func { + if result := callMethod(method, params); result.IsSome() { + return result.v + } + return value + } + + switch current.Kind() { + case reflect.Map: + key := toType(name, current.Type().Key()) + if key.IsErr() { + return value + } + + current = resolveIndirect(current.MapIndex(key.v)) + case reflect.Slice, reflect.Array: + if pair := extractFromMapOrd(name, current); pair.IsSome() { + return pair.v + } + + idx := name.ToInt() + if idx.IsErr() || idx.v.Gte(Int(current.Len())) { + return value + } + + current = current.Index(idx.v.Std()) + case reflect.Struct: + current = current.FieldByName(name.Std()) + } + + if current.IsValid() && current.CanInterface() { + return current.Interface() + } + + return value +} diff --git a/backend/vendor/github.com/enetx/g/rand/rand.go b/backend/vendor/github.com/enetx/g/rand/rand.go new file mode 100644 index 0000000..29f3e7c --- /dev/null +++ b/backend/vendor/github.com/enetx/g/rand/rand.go @@ -0,0 +1,62 @@ +package rand + +import ( + "crypto/rand" + "encoding/binary" + "io" + + "github.com/enetx/g/constraints" +) + +// U64 returns a cryptographically secure random uint64 value. +// It reads 8 random bytes from crypto/rand.Reader and interprets +// them as a little-endian unsigned integer. +// Panics if the system random number generator is unavailable. +func U64() uint64 { + var b [8]byte + if _, err := io.ReadFull(rand.Reader, b[:]); err != nil { + panic(err) + } + + return binary.LittleEndian.Uint64(b[:]) +} + +// N generates a random non-negative integer within the range [0, max). +// The generated integer will be less than the provided maximum value. +// If max is less than or equal to 0, the function will treat it as if max is 1. +// +// Usage: +// +// n := 10 +// randomInt := rand.N(n) +// fmt.Printf("Random integer between 0 and %d: %d\n", max, randomInt) +// +// Parameters: +// - n (int): The maximum bound for the random integer to be generated. +// +// Returns: +// - int: A random non-negative integer within the specified range. +func N[T constraints.Integer](n T) T { + if n <= 0 { + return 0 + } + + w := uint64(n) + if w == 1 { + return 0 + } + + if w&(w-1) == 0 { + return T(U64() & (w - 1)) + } + + const maxU64 = ^uint64(0) + limit := maxU64 - (maxU64 % w) + + for { + randv := U64() + if randv < limit { + return T(randv % w) + } + } +} diff --git a/backend/vendor/github.com/enetx/g/ref/of.go b/backend/vendor/github.com/enetx/g/ref/of.go new file mode 100644 index 0000000..9aba1bc --- /dev/null +++ b/backend/vendor/github.com/enetx/g/ref/of.go @@ -0,0 +1,22 @@ +// Package ref provides a utility function for creating a pointer to a value. +// It is designed to simplify the process of obtaining a pointer to a value of any type. +package ref + +// Of creates a pointer to the provided value of type 'E'. +// The primary purpose of this function is to simplify the creation of pointers to values +// without needing to use temporary variables. +// +// Parameters: +// +// e: The value of type 'E' to create a pointer for. +// +// Returns: +// +// *E: A pointer to the provided value 'e'. +// +// Example usage: +// +// intValue := 42 +// intPtr := ref.Of(intValue) +// fmt.Println(*intPtr) +func Of[E any](e E) *E { return &e } diff --git a/backend/vendor/github.com/enetx/g/result.go b/backend/vendor/github.com/enetx/g/result.go new file mode 100644 index 0000000..ec4eda0 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/result.go @@ -0,0 +1,175 @@ +package g + +import ( + "errors" + "fmt" + "os" + "path/filepath" + "runtime" +) + +// Ok returns a new Result[T] containing the given value. +func Ok[T any](value T) Result[T] { return Result[T]{v: value} } + +// Err returns a new Result[T] containing the given error. +func Err[T any](err error) Result[T] { + if err == nil { + err = errors.New("g.Err called with a nil error") + } + + return Result[T]{err: err} +} + +// ResultOf returns a new Result[T] based on the provided value and error. +// If err is not nil, it returns an Err Result. +// Otherwise, it returns an Ok Result. +func ResultOf[T any](value T, err error) Result[T] { + if err != nil { + return Err[T](err) + } + + return Ok(value) +} + +// TransformResult applies a function to the contained Ok value, returning a new Result. +// If the input Result is Err, the error is propagated. +// This is also known as 'and_then' or 'flat_map'. +func TransformResult[T, U any](r Result[T], fn func(T) Result[U]) Result[U] { + if r.IsOk() { + return fn(r.v) + } + + return Err[U](r.err) +} + +// TransformResultOf applies a function that returns a (value, error) tuple to the contained Ok value. +// If the input Result is Err, the error is propagated. +func TransformResultOf[T, U any](r Result[T], fn func(T) (U, error)) Result[U] { + if r.IsOk() { + return ResultOf(fn(r.v)) + } + + return Err[U](r.err) +} + +// Ok returns the value held in the Result. +// +// WARNING: If the Result contains an error, this method will return the zero value +// for type T. Always check IsOk() before calling this method, or use safer alternatives +// like Result(), Unwrap(), or UnwrapOr(). +func (r Result[T]) Ok() T { return r.v } + +// Err returns the error held in the Result. If the result is Ok, it returns nil. +func (r Result[T]) Err() error { return r.err } + +// IsOk returns true if the Result contains a value (no error). +func (r Result[T]) IsOk() bool { return r.err == nil } + +// IsErr returns true if the Result contains an error. +func (r Result[T]) IsErr() bool { return r.err != nil } + +// Result returns the value and error, conforming to the standard Go multi-value return pattern. +func (r Result[T]) Result() (T, error) { + if r.IsOk() { + return r.v, nil + } + + var zero T + return zero, r.err +} + +// Unwrap returns the value held in the Result. If the Result is Err, it panics. +func (r Result[T]) Unwrap() T { + if r.IsOk() { + return r.v + } + + if pc, file, line, ok := runtime.Caller(1); ok { + out := fmt.Sprintf( + "[%s:%d] [%s] unwrapped an Err value: %v", filepath.Base(file), line, runtime.FuncForPC(pc).Name(), r.err) + fmt.Fprintln(os.Stderr, out) + } + + panic(r.err) +} + +// UnwrapOr returns the value held in the Result. If the Result is Err, it returns the provided default value. +func (r Result[T]) UnwrapOr(value T) T { + if r.IsOk() { + return r.v + } + + return value +} + +// UnwrapOrDefault returns the contained value if Ok, otherwise returns the zero value for T. +func (r Result[T]) UnwrapOrDefault() T { + if r.IsOk() { + return r.v + } + + var zero T + return zero +} + +// Expect returns the value held in the Result. If the Result is Err, it panics with the provided message. +func (r Result[T]) Expect(msg string) T { + if r.IsOk() { + return r.v + } + + out := fmt.Sprintf("Expect() failed: %s: %v", msg, r.err) + fmt.Fprintln(os.Stderr, out) + panic(out) +} + +// Then applies a function to the contained value (if Ok) and returns the result. +// If the Result is Err, it returns the same Err without applying the function. +func (r Result[T]) Then(fn func(T) Result[T]) Result[T] { + if r.IsOk() { + return fn(r.v) + } + + return r +} + +// ThenOf applies a function to the contained value (if Ok) and returns a new Result +// based on the returned (T, error) tuple. +func (r Result[T]) ThenOf(fn func(T) (T, error)) Result[T] { + if r.IsOk() { + return ResultOf(fn(r.v)) + } + + return r +} + +// MapErr transforms the error in an Err Result by applying a function to it. +// It is useful for custom error handling, like replacing one error with another. +// If the Result is Ok, it does nothing. +func (r Result[T]) MapErr(fn func(error) error) Result[T] { + if r.IsErr() { + return Err[T](fn(r.err)) + } + + return r +} + +// Option converts a Result into an Option. +// If the Result is Ok, it returns Some(value). +// If the Result is Err, it returns None. +func (r Result[T]) Option() Option[T] { + if r.IsOk() { + return Some(r.v) + } + + return None[T]() +} + +// String returns a string representation of the Result. +func (r Result[T]) String() string { + if r.IsOk() { + return fmt.Sprintf("Ok(%v)", r.v) + } + + return fmt.Sprintf("Err(%v)", r.err) +} diff --git a/backend/vendor/github.com/enetx/g/result_iter.go b/backend/vendor/github.com/enetx/g/result_iter.go new file mode 100644 index 0000000..67ba734 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/result_iter.go @@ -0,0 +1,527 @@ +package g + +import ( + "context" + + "github.com/enetx/g/f" + "github.com/enetx/iter" +) + +// Pull converts the “push-style” sequence of Result[V] into a “pull-style” iterator accessed by two functions: next and stop. +// +// The next function returns the next Result[V] in the sequence and a boolean indicating whether the value is valid. +// When the sequence is over, next returns the zero value and false. It is valid to call next after reaching the end +// of the sequence or after calling stop. These calls will continue to return the zero value and false. +// +// The stop function ends the iteration. It must be called when the caller is no longer interested in next values and +// next has not yet signaled that the sequence is over. It is valid to call stop multiple times and after next has +// already returned false. +// +// It is an error to call next or stop from multiple goroutines simultaneously. +func (seq SeqResult[V]) Pull() (func() (Result[V], bool), func()) { + return iter.Pull(iter.Seq[Result[V]](seq)) +} + +// All checks whether all Ok values in the sequence satisfy the provided condition. +// +// If an Err is encountered in the sequence, that Err is immediately returned. +// Otherwise, it returns Ok(true) if all Ok values satisfy the function, or Ok(false) if at least one does not. +func (seq SeqResult[V]) All(fn func(v V) bool) Result[bool] { + result := Ok(true) + + seq(func(v Result[V]) bool { + if v.IsErr() { + result = Err[bool](v.err) + return false + } + + if !fn(v.v) { + result = Ok(false) + return false + } + + return true + }) + + return result +} + +// Any checks whether any Ok value in the sequence satisfies the provided condition. +// +// If an Err is encountered, that Err is immediately returned. +// Otherwise, it returns Ok(true) if at least one Ok value satisfies the function, or Ok(false) if none do. +func (seq SeqResult[V]) Any(fn func(v V) bool) Result[bool] { + result := Ok(false) + + seq(func(v Result[V]) bool { + if v.IsErr() { + result = Err[bool](v.err) + return false + } + + if fn(v.v) { + result = Ok(true) + return false + } + + return true + }) + + return result +} + +// Collect gathers all Ok values from the iterator into a Slice. +// If any value is Err, the first such Err is returned immediately. +func (seq SeqResult[V]) Collect() Slice[Result[V]] { return iter.ToSlice(iter.Seq[Result[V]](seq)) } + +// Count consumes the entire sequence, counting how many times the yield function is invoked. +// Err elements do not stop the count but are still passed to the yield function (which returns false immediately, stopping iteration). +func (seq SeqResult[V]) Count() Int { + var counter Int + seq(func(Result[V]) bool { + counter++ + return true + }) + + return counter +} + +// Map transforms each Ok value in the sequence using the given function, returning a new sequence of Result. +// +// If an Err is encountered, it is passed downstream as-is and ends the iteration (yield returns false). +func (seq SeqResult[V]) Map(transform func(V) V) SeqResult[V] { + return func(yield func(Result[V]) bool) { + seq(func(v Result[V]) bool { + if v.IsErr() { + yield(v) + return false + } + return yield(Ok(transform(v.v))) + }) + } +} + +// Filter returns a new sequence containing only the Ok elements that satisfy the provided function. +// +// If an Err is encountered, it is yielded immediately as Err (and stops further iteration). +// Only Ok elements for which fn returns true are yielded downstream as Ok. +func (seq SeqResult[V]) Filter(fn func(V) bool) SeqResult[V] { + return func(yield func(Result[V]) bool) { + seq(func(v Result[V]) bool { + if v.IsErr() { + yield(v) + return false + } + if fn(v.v) { + return yield(v) + } + return true + }) + } +} + +// Exclude returns a new sequence that excludes Ok elements which satisfy the provided function. +// +// If an Err is encountered, it is yielded as Err (and stops iteration). +// Only Ok elements for which 'fn' returns false are yielded downstream. +func (seq SeqResult[V]) Exclude(fn func(V) bool) SeqResult[V] { + return func(yield func(Result[V]) bool) { + seq(func(v Result[V]) bool { + if v.IsErr() { + yield(v) + return false + } + if !fn(v.v) { + return yield(v) + } + return true + }) + } +} + +// Dedup removes consecutive duplicates of Ok values from the sequence, returning a new sequence. +// +// If an Err is encountered, it is yielded immediately and iteration stops. +// Consecutive Ok duplicates (based on equality) are filtered out so only the first occurrence is yielded. +func (seq SeqResult[V]) Dedup() SeqResult[V] { + return func(yield func(Result[V]) bool) { + var current V + hasFirst := false + comparable := f.IsComparable(current) + + seq(func(v Result[V]) bool { + if v.IsErr() { + yield(v) + return false + } + + if !hasFirst { + hasFirst = true + current = v.v + return yield(v) + } + + if comparable { + if f.Eq[any](current)(v.v) { + return true + } + } else { + if f.Eqd(current)(v.v) { + return true + } + } + + current = v.v + return yield(v) + }) + } +} + +// Unique returns a new sequence that contains only the first occurrence of each distinct Ok value. +// +// If an Err is encountered, it is yielded immediately and iteration stops. +// Future occurrences of a previously seen Ok value are skipped. +func (seq SeqResult[V]) Unique() SeqResult[V] { + return func(yield func(Result[V]) bool) { + seen := NewSet[any]() + seq(func(v Result[V]) bool { + if v.IsErr() { + yield(v) + return false + } + if !seen.Contains(v.v) { + seen.Insert(v.v) + return yield(v) + } + return true + }) + } +} + +// ForEach applies a function to each Result in the sequence (Ok or Err) without modifying the sequence. +// +// The iteration continues over all elements, passing them to fn for side effects. +func (seq SeqResult[V]) ForEach(fn func(v Result[V])) { + seq(func(v Result[V]) bool { + fn(v) + return true + }) +} + +// Range iterates through elements until the given function returns false. +// +// For each element (Ok or Err), fn is called. If fn returns false, iteration stops immediately. +func (seq SeqResult[V]) Range(fn func(v Result[V]) bool) { + seq(func(v Result[V]) bool { + return fn(v) + }) +} + +// Skip returns a new sequence that skips the first n Ok elements. +// +// If an Err is encountered, it is yielded as is and iteration stops. Once n Ok elements have been skipped, +// subsequent elements (Ok or Err) are yielded normally. +func (seq SeqResult[V]) Skip(n uint) SeqResult[V] { + return func(yield func(Result[V]) bool) { + seq(func(v Result[V]) bool { + if v.IsErr() { + yield(v) + return false + } + if n > 0 { + n-- + return true + } + return yield(v) + }) + } +} + +// StepBy creates a new sequence that yields every nth Ok element from the original sequence. +// +// If an Err is encountered, it is yielded immediately and stops iteration. +// For Ok elements, only every n-th element is yielded. +func (seq SeqResult[V]) StepBy(n uint) SeqResult[V] { + return func(yield func(Result[V]) bool) { + i := uint(0) + seq(func(v Result[V]) bool { + if v.IsErr() { + yield(v) + return false + } + i++ + if (i-1)%n == 0 { + return yield(v) + } + return true + }) + } +} + +// Take returns a new sequence with the first n Ok elements. +// If an Err is encountered, it is yielded immediately and iteration stops. +// After n Ok elements are yielded, the sequence ends. +func (seq SeqResult[V]) Take(n uint) SeqResult[V] { + return func(yield func(Result[V]) bool) { + seq(func(v Result[V]) bool { + if v.IsErr() { + yield(v) + return false + } + if n == 0 { + return false + } + n-- + return yield(v) + }) + } +} + +// Nth returns the nth Ok element (0-indexed) in the sequence. +// If an Err is encountered before reaching the nth element, that Err is returned. +// If there are fewer than n+1 Ok elements, None is returned. +func (seq SeqResult[V]) Nth(n Int) Result[Option[V]] { + if n < 0 { + return Ok(None[V]()) + } + + var i Int + result := Ok(None[V]()) + found := false + + seq(func(v Result[V]) bool { + if found { + return false + } + if v.IsErr() { + result = Err[Option[V]](v.err) + found = true + return false + } + if i == n { + result = Ok(Some(v.v)) + found = true + return false + } + i++ + return true + }) + + return result +} + +// Chain concatenates this sequence with other sequences, returning a new sequence of Result[V]. +// +// The function yields all elements (Ok or Err) from the current sequence, then from each of the provided sequences in order. +// If an Err is encountered, it is yielded immediately, ending further iteration. +func (seq SeqResult[V]) Chain(seqs ...SeqResult[V]) SeqResult[V] { + return func(yield func(Result[V]) bool) { + for _, seq := range append([]SeqResult[V]{seq}, seqs...) { + seq(func(v Result[V]) bool { + if v.IsErr() { + yield(v) + return false + } + return yield(v) + }) + } + } +} + +// Intersperse inserts the provided Ok separator between each Ok element of the sequence. +// +// If an Err is encountered, it is yielded as Err and iteration stops immediately. +// For Ok elements, after the first yield, a separator is inserted before each subsequent Ok value. +func (seq SeqResult[V]) Intersperse(sep V) SeqResult[V] { + return func(yield func(Result[V]) bool) { + first := true + + seq(func(v Result[V]) bool { + if v.IsErr() { + yield(v) + return false + } + + if !first && !yield(Ok(sep)) { + return false + } + + first = false + return yield(v) + }) + } +} + +// Inspect calls fn for every Ok value without changing it. +// An Err immediately stops iteration by returning false. +func (seq SeqResult[V]) Inspect(fn func(v V)) SeqResult[V] { + return func(yield func(Result[V]) bool) { + seq(func(v Result[V]) bool { + if v.IsErr() { + yield(v) + return false + } + fn(v.v) + return yield(v) + }) + } +} + +// Find searches the sequence for the first Ok value that satisfies the provided function. +// +// If an Err is encountered, it returns that Err immediately. If a matching Ok value is found, +// iteration stops and we return Ok(Some(...)). If no matching Ok value is found, it returns Ok(None). +func (seq SeqResult[V]) Find(fn func(V) bool) Result[Option[V]] { + result := Ok(None[V]()) + + seq(func(v Result[V]) bool { + if v.IsErr() { + result = Err[Option[V]](v.err) + return false + } + if fn(v.v) { + result = Ok(Some(v.v)) + return false + } + return true + }) + + return result +} + +// Context allows the iteration to be controlled with a context.Context. +func (seq SeqResult[V]) Context(ctx context.Context) SeqResult[V] { + return func(yield func(Result[V]) bool) { + seq(func(v Result[V]) bool { + select { + case <-ctx.Done(): + return false + default: + return yield(v) + } + }) + } +} + +// First returns the first Ok element from the sequence. +// If the sequence is empty or contains only Err values, None is returned. +// If an Err is encountered, that Err is returned. +func (seq SeqResult[V]) First() Result[Option[V]] { + result := Ok(None[V]()) + found := false + + seq(func(v Result[V]) bool { + if found { + return false + } + if v.IsErr() { + result = Err[Option[V]](v.err) + found = true + return false + } + result = Ok(Some(v.v)) + found = true + return false + }) + + return result +} + +// Last returns the last Ok element from the sequence. +// If the sequence is empty or contains only Err values, None is returned. +// If an Err is encountered, that Err is returned. +func (seq SeqResult[V]) Last() Result[Option[V]] { + result := Ok(None[V]()) + + seq(func(v Result[V]) bool { + if v.IsErr() { + result = Err[Option[V]](v.err) + return false + } + result = Ok(Some(v.v)) + return true + }) + + return result +} + +// Next extracts the next element from the iterator and advances it. +// +// This method consumes the next element from the iterator and returns it wrapped in an Option. +// The iterator itself is modified to point to the remaining elements. +// +// Returns: +// - Option[Result[V]]: Some(Result[V]) if an element exists, None if the iterator is exhausted. +func (seq *SeqResult[V]) Next() Option[Result[V]] { + if value, remaining, ok := iter.Next(iter.Seq[Result[V]](*seq)); ok { + *seq = SeqResult[V](remaining) + return Some(value) + } + + return None[Result[V]]() +} + +// Partition separates the sequence into two slices: one containing all Ok values and one containing all errors. +// The iteration continues through all elements, collecting each into the appropriate slice. +func (seq SeqResult[V]) Partition() (Slice[V], Slice[error]) { + ok := NewSlice[V]() + err := NewSlice[error]() + + seq(func(v Result[V]) bool { + if v.IsOk() { + ok = append(ok, v.v) + } else { + err = append(err, v.err) + } + return true + }) + + return ok, err +} + +// Ok returns a new sequence containing only the Ok values from the original sequence. +// All Err values are filtered out. +func (seq SeqResult[V]) Ok() SeqSlice[V] { + return SeqSlice[V](func(yield func(V) bool) { + seq(func(v Result[V]) bool { + if v.IsOk() { + return yield(v.v) + } + return true + }) + }) +} + +// Err returns a new sequence containing only the error values from the original sequence. +// All Ok values are filtered out. +func (seq SeqResult[V]) Err() SeqSlice[error] { + return SeqSlice[error](func(yield func(error) bool) { + seq(func(v Result[V]) bool { + if v.IsErr() { + return yield(v.err) + } + return true + }) + }) +} + +// FirstErr returns the first error encountered in the sequence. +// If no error is found, it returns None. The iteration stops at the first error. +func (seq SeqResult[V]) FirstErr() Option[error] { + result := None[error]() + found := false + + seq(func(v Result[V]) bool { + if found { + return false + } + if v.IsErr() { + result = Some(v.err) + found = true + return false + } + return true + }) + + return result +} diff --git a/backend/vendor/github.com/enetx/g/set.go b/backend/vendor/github.com/enetx/g/set.go new file mode 100644 index 0000000..ce3df6c --- /dev/null +++ b/backend/vendor/github.com/enetx/g/set.go @@ -0,0 +1,360 @@ +package g + +import ( + "fmt" +) + +// NewSet creates a new Set of the specified size or an empty Set if no size is provided. +func NewSet[T comparable](size ...Int) Set[T] { + return make(Set[T], Slice[Int](size).Get(0).UnwrapOrDefault()) +} + +// TransformSet applies the given function to each element of a Set and returns a new Set +// containing the transformed values. +// +// Parameters: +// +// - s: The input Set. +// - fn: The function to apply to each element of the input Set. +// +// Returns: +// +// A new Set containing the results of applying the function to each element of the input Set. +func TransformSet[T, U comparable](s Set[T], fn func(T) U) Set[U] { + if len(s) == 0 { + return NewSet[U]() + } + + result := make(Set[U], len(s)) + for v := range s { + result[fn(v)] = struct{}{} + } + + return result +} + +// SetOf creates a new generic set containing the provided elements. +func SetOf[T comparable](values ...T) Set[T] { + set := make(Set[T], len(values)) + for _, v := range values { + set[v] = struct{}{} + } + + return set +} + +// Transform applies a transformation function to the Set and returns the result. +func (s Set[T]) Transform(fn func(Set[T]) Set[T]) Set[T] { return fn(s) } + +// Iter returns an iterator (SeqSet[T]) for the Set, allowing for sequential iteration +// over its elements. It is commonly used in combination with higher-order functions, +// such as 'ForEach' or 'SetMap', to perform operations on each element of the Set. +// +// Returns: +// +// A SeqSet[T], which can be used for sequential iteration over the elements of the Set. +// +// Example usage: +// +// iter := g.SetOf(1, 2, 3).Iter() +// iter.ForEach(func(val T) { +// fmt.Println(val) // Replace this with the function logic you need. +// }) +// +// The 'Iter' method provides a convenient way to traverse the elements of a Set +// in a functional style, enabling operations like mapping or filtering. +// func (s Set[T]) Iter() SeqSet[T] { return seqSet(s) } +func (s Set[T]) Iter() SeqSet[T] { + return func(yield func(T) bool) { + for v := range s { + if !yield(v) { + return + } + } + } +} + +// func (s Set[T]) Iter() SeqSet[T] { return seqSet(s) } + +// Insert adds the provided elements to the set. +func (s Set[T]) Insert(values ...T) { + for _, v := range values { + s[v] = struct{}{} + } +} + +// Remove removes the specified values from the Set. +func (s Set[T]) Remove(values ...T) { + for _, v := range values { + delete(s, v) + } +} + +// Len returns the number of values in the Set. +func (s Set[T]) Len() Int { return Int(len(s)) } + +// Contains checks if the Set contains the specified value. +func (s Set[T]) Contains(v T) bool { + _, ok := s[v] + return ok +} + +// ContainsAny checks if the Set contains any element from another Set. +func (s Set[T]) ContainsAny(other Set[T]) bool { + if s.Empty() || other.Empty() { + return false + } + + if len(s) <= len(other) { + for v := range s { + if _, ok := other[v]; ok { + return true + } + } + } else { + for v := range other { + if _, ok := s[v]; ok { + return true + } + } + } + + return false +} + +// ContainsAll checks if the Set contains all elements from another Set. +func (s Set[T]) ContainsAll(other Set[T]) bool { + if len(s) < len(other) { + return false + } + + for v := range other { + if _, ok := s[v]; !ok { + return false + } + } + + return true +} + +// Clone creates a new Set that is a copy of the original Set. +func (s Set[T]) Clone() Set[T] { + if s.Empty() { + return NewSet[T]() + } + + clone := make(Set[T], len(s)) + for k := range s { + clone[k] = struct{}{} + } + + return clone +} + +// ToSlice returns a new Slice with the same elements as the Set[T]. +func (s Set[T]) ToSlice() Slice[T] { + if s.Empty() { + return NewSlice[T]() + } + + sl := make(Slice[T], 0, len(s)) + for v := range s { + sl = append(sl, v) + } + + return sl +} + +// Intersection returns the intersection of the current set and another set, i.e., elements +// present in both sets. +// +// Parameters: +// +// - other Set[T]: The other set to calculate the intersection with. +// +// Returns: +// +// - Set[T]: A new Set containing the intersection of the two sets. +// +// Example usage: +// +// s1 := g.SetOf(1, 2, 3, 4, 5) +// s2 := g.SetOf(4, 5, 6, 7, 8) +// intersection := s1.Intersection(s2) +// +// The resulting intersection will be: [4, 5]. +func (s Set[T]) Intersection(other Set[T]) SeqSet[T] { + if len(s) <= len(other) { + return intersection(s.Iter(), other) + } + + return intersection(other.Iter(), s) +} + +// Difference returns the difference between the current set and another set, +// i.e., elements present in the current set but not in the other set. +// +// Parameters: +// +// - other Set[T]: The other set to calculate the difference with. +// +// Returns: +// +// - Set[T]: A new Set containing the difference between the two sets. +// +// Example usage: +// +// s1 := g.SetOf(1, 2, 3, 4, 5) +// s2 := g.SetOf(4, 5, 6, 7, 8) +// diff := s1.Difference(s2) +// +// The resulting diff will be: [1, 2, 3]. +func (s Set[T]) Difference(other Set[T]) SeqSet[T] { return difference(s.Iter(), other) } + +// Union returns a new set containing the unique elements of the current set and the provided +// other set. +// +// Parameters: +// +// - other Set[T]: The other set to create the union with. +// +// Returns: +// +// - Set[T]: A new Set containing the unique elements of the current set and the provided +// other set. +// +// Example usage: +// +// s1 := g.SetOf(1, 2, 3) +// s2 := g.SetOf(3, 4, 5) +// union := s1.Union(s2) +// +// The resulting union set will be: [1, 2, 3, 4, 5]. +func (s Set[T]) Union(other Set[T]) SeqSet[T] { + if len(s) > len(other) { + return s.Iter().Chain(other.Difference(s)) + } + + return other.Iter().Chain(s.Difference(other)) +} + +// SymmetricDifference returns the symmetric difference between the current set and another +// set, i.e., elements present in either the current set or the other set but not in both. +// +// Parameters: +// +// - other Set[T]: The other set to calculate the symmetric difference with. +// +// Returns: +// +// - Set[T]: A new Set containing the symmetric difference between the two sets. +// +// Example usage: +// +// s1 := g.SetOf(1, 2, 3, 4, 5) +// s2 := g.SetOf(4, 5, 6, 7, 8) +// symDiff := s1.SymmetricDifference(s2) +// +// The resulting symDiff will be: [1, 2, 3, 6, 7, 8]. +func (s Set[T]) SymmetricDifference(other Set[T]) SeqSet[T] { + return s.Difference(other).Chain(other.Difference(s)) +} + +// Subset checks if the current set 's' is a subset of the provided 'other' set. +// A set 's' is a subset of 'other' if all elements of 's' are also elements of 'other'. +// +// Parameters: +// +// - other Set[T]: The other set to compare with. +// +// Returns: +// +// - bool: true if 's' is a subset of 'other', false otherwise. +// +// Example usage: +// +// s1 := g.SetOf(1, 2, 3) +// s2 := g.SetOf(1, 2, 3, 4, 5) +// isSubset := s1.Subset(s2) // Returns true +func (s Set[T]) Subset(other Set[T]) bool { return other.ContainsAll(s) } + +// Superset checks if the current set 's' is a superset of the provided 'other' set. +// A set 's' is a superset of 'other' if all elements of 'other' are also elements of 's'. +// +// Parameters: +// +// - other Set[T]: The other set to compare with. +// +// Returns: +// +// - bool: true if 's' is a superset of 'other', false otherwise. +// +// Example usage: +// +// s1 := g.SetOf(1, 2, 3, 4, 5) +// s2 := g.SetOf(1, 2, 3) +// isSuperset := s1.Superset(s2) // Returns true +func (s Set[T]) Superset(other Set[T]) bool { return s.ContainsAll(other) } + +// Eq checks if two Sets are equal. +func (s Set[T]) Eq(other Set[T]) bool { + if len(s) != len(other) { + return false + } + + for v := range other { + if _, ok := s[v]; !ok { + return false + } + } + + return true +} + +// Ne checks if two Sets are not equal. +func (s Set[T]) Ne(other Set[T]) bool { return !s.Eq(other) } + +// Clear removes all values from the Set. +func (s Set[T]) Clear() { + for k := range s { + delete(s, k) + } +} + +// Empty checks if the Set is empty. +func (s Set[T]) Empty() bool { return len(s) == 0 } + +// NotEmpty checks if the Set is not empty. +func (s Set[T]) NotEmpty() bool { return !s.Empty() } + +// String returns a string representation of the Set. +func (s Set[T]) String() string { + if s.Empty() { + return "Set{}" + } + + var b Builder + b.WriteString("Set{") + + first := true + for v := range s { + if !first { + b.WriteString(", ") + } + + first = false + b.WriteString(Format("{}", v)) + } + + b.WriteString("}") + + return b.String().Std() +} + +// Print writes the elements of the Set to the standard output (console) +// and returns the Set unchanged. +func (s Set[T]) Print() Set[T] { fmt.Print(s); return s } + +// Println writes the elements of the Set to the standard output (console) with a newline +// and returns the Set unchanged. +func (s Set[T]) Println() Set[T] { fmt.Println(s); return s } diff --git a/backend/vendor/github.com/enetx/g/set_iter.go b/backend/vendor/github.com/enetx/g/set_iter.go new file mode 100644 index 0000000..8cd973f --- /dev/null +++ b/backend/vendor/github.com/enetx/g/set_iter.go @@ -0,0 +1,315 @@ +package g + +import ( + "context" + + "github.com/enetx/iter" +) + +// Pull converts the “push-style” iterator sequence seq +// into a “pull-style” iterator accessed by the two functions +// next and stop. +// +// Next returns the next value in the sequence +// and a boolean indicating whether the value is valid. +// When the sequence is over, next returns the zero V and false. +// It is valid to call next after reaching the end of the sequence +// or after calling stop. These calls will continue +// to return the zero V and false. +// +// Stop ends the iteration. It must be called when the caller is +// no longer interested in next values and next has not yet +// signaled that the sequence is over (with a false boolean return). +// It is valid to call stop multiple times and when next has +// already returned false. +// +// It is an error to call next or stop from multiple goroutines +// simultaneously. +func (seq SeqSet[V]) Pull() (func() (V, bool), func()) { return iter.Pull(iter.Seq[V](seq)) } + +// Inspect creates a new iterator that wraps around the current iterator +// and allows inspecting each element as it passes through. +func (seq SeqSet[V]) Inspect(fn func(v V)) SeqSet[V] { + return SeqSet[V](iter.Inspect(iter.Seq[V](seq), fn)) +} + +// Collect gathers all elements from the iterator into a Set. +func (seq SeqSet[V]) Collect() Set[V] { + collection := make(Set[V]) + + seq(func(v V) bool { + collection[v] = struct{}{} + return true + }) + + return collection +} + +// Chain concatenates the current iterator with other iterators, returning a new iterator. +// +// The function creates a new iterator that combines the elements of the current iterator +// with elements from the provided iterators in the order they are given. +// +// Params: +// +// - seqs ([]SeqSet[V]): Other iterators to be concatenated with the current iterator. +// +// Returns: +// +// - SeqSet[V]: A new iterator containing elements from the current iterator and the provided iterators. +// +// Example usage: +// +// iter1 := g.SetOf(1, 2, 3).Iter() +// iter2 := g.SetOf(4, 5, 6).Iter() +// iter1.Chain(iter2).Collect().Print() +// +// Output: Set{3, 4, 5, 6, 1, 2} // The output order may vary as the Set type is not ordered. +// +// The resulting iterator will contain elements from both iterators. +func (seq SeqSet[V]) Chain(seqs ...SeqSet[V]) SeqSet[V] { + iterSeqs := make([]iter.Seq[V], len(seqs)) + for i, s := range seqs { + iterSeqs[i] = iter.Seq[V](s) + } + + return SeqSet[V](iter.Chain(iter.Seq[V](seq), iterSeqs...)) +} + +// Count consumes the iterator, counting the number of iterations and returning it. +func (seq SeqSet[V]) Count() Int { return Int(iter.Count(iter.Seq[V](seq))) } + +// ForEach iterates through all elements and applies the given function to each. +// +// The function applies the provided function to each element of the iterator. +// +// Params: +// +// - fn (func(V)): The function to apply to each element. +// +// Example usage: +// +// iter := g.SetOf(1, 2, 3).Iter() +// iter.ForEach(func(val V) { +// fmt.Println(val) // Replace this with the function logic you need. +// }) +// +// The provided function will be applied to each element in the iterator. +func (seq SeqSet[V]) ForEach(fn func(v V)) { iter.ForEach(iter.Seq[V](seq), fn) } + +// Range iterates through elements until the given function returns false. +// +// The function iterates through the elements of the iterator and applies the provided function to each element. +// The iteration will stop when the provided function returns false for an element. +// +// Params: +// - fn (func(V) bool): The function that evaluates elements for continuation of iteration. +// +// Example usage: +// +// iter := g.SetOf(1, 2, 2, 3, 4, 5).Iter() +// +// iter.Range(func(v int) bool { +// if v == 3 { +// return false +// } +// print(v) +// return true +// }) +func (seq SeqSet[V]) Range(fn func(v V) bool) { iter.Range(iter.Seq[V](seq), fn) } + +// Filter returns a new iterator containing only the elements that satisfy the provided function. +// +// The function applies the provided function to each element of the iterator. +// If the function returns true for an element, that element is included in the resulting iterator. +// +// Parameters: +// +// - fn (func(V) bool): The function to be applied to each element of the iterator +// to determine if it should be included in the result. +// +// Returns: +// +// - SeqSet[V]: A new iterator containing the elements that satisfy the given condition. +// +// Example usage: +// +// set := g.SetOf(1, 2, 3, 4, 5) +// even := set.Iter(). +// Filter( +// func(val int) bool { +// return val%2 == 0 +// }). +// Collect() +// even.Print() +// +// Output: Set{2, 4} // The output order may vary as the Set type is not ordered. +// +// The resulting iterator will contain only the elements that satisfy the provided function. +func (seq SeqSet[V]) Filter(fn func(V) bool) SeqSet[V] { + return SeqSet[V](iter.Filter(iter.Seq[V](seq), fn)) +} + +// Exclude returns a new iterator excluding elements that satisfy the provided function. +// +// The function applies the provided function to each element of the iterator. +// If the function returns true for an element, that element is excluded from the resulting iterator. +// +// Parameters: +// +// - fn (func(V) bool): The function to be applied to each element of the iterator +// to determine if it should be excluded from the result. +// +// Returns: +// +// - SeqSet[V]: A new iterator containing the elements that do not satisfy the given condition. +// +// Example usage: +// +// set := g.SetOf(1, 2, 3, 4, 5) +// notEven := set.Iter(). +// Exclude( +// func(val int) bool { +// return val%2 == 0 +// }). +// Collect() +// notEven.Print() +// +// Output: Set{1, 3, 5} // The output order may vary as the Set type is not ordered. +// +// The resulting iterator will contain only the elements that do not satisfy the provided function. +func (seq SeqSet[V]) Exclude(fn func(V) bool) SeqSet[V] { + return SeqSet[V](iter.Exclude(iter.Seq[V](seq), fn)) +} + +// Map transforms each element in the iterator using the given function. +// +// The function creates a new iterator by applying the provided function to each element +// of the original iterator. +// +// Params: +// +// - fn (func(V) V): The function used to transform elements. +// +// Returns: +// +// - SeqSet[V]: A new iterator containing elements transformed by the provided function. +// +// Example usage: +// +// set := g.SetOf(1, 2, 3) +// doubled := set.Iter(). +// Map( +// func(val int) int { +// return val * 2 +// }). +// Collect() +// doubled.Print() +// +// Output: Set{2, 4, 6} // The output order may vary as the Set type is not ordered. +// +// The resulting iterator will contain elements transformed by the provided function. +func (seq SeqSet[V]) Map(transform func(V) V) SeqSet[V] { + return SeqSet[V](iter.Map(iter.Seq[V](seq), transform)) +} + +// Find searches for an element in the iterator that satisfies the provided function. +// +// The function iterates through the elements of the iterator and returns the first element +// for which the provided function returns true. +// +// Params: +// +// - fn (func(V) bool): The function used to test elements for a condition. +// +// Returns: +// +// - Option[V]: An Option containing the first element that satisfies the condition; None if not found. +// +// Example usage: +// +// iter := g.SetOf(1, 2, 3, 4, 5).Iter() +// +// found := iter.Find( +// func(i int) bool { +// return i == 2 +// }) +// +// if found.IsSome() { +// fmt.Println("Found:", found.Some()) +// } else { +// fmt.Println("Not found.") +// } +// +// The resulting Option may contain the first element that satisfies the condition, or None if not found. +func (seq SeqSet[V]) Find(fn func(v V) bool) Option[V] { + return OptionOf(iter.Find(iter.Seq[V](seq), fn)) +} + +// Context allows the iteration to be controlled with a context.Context. +func (seq SeqSet[V]) Context(ctx context.Context) SeqSet[V] { + return SeqSet[V](iter.Context(iter.Seq[V](seq), ctx)) +} + +// Take returns a new iterator with the first n elements. +// The function creates a new iterator containing the first n elements from the original iterator. +func (seq SeqSet[V]) Take(n uint) SeqSet[V] { return SeqSet[V](iter.Take(iter.Seq[V](seq), int(n))) } + +// Nth returns the nth element (0-indexed) in the sequence. +func (seq SeqSet[V]) Nth(n Int) Option[V] { + return OptionOf(iter.Nth(iter.Seq[V](seq), int(n))) +} + +func difference[V comparable](seq SeqSet[V], other Set[V]) SeqSet[V] { + return func(yield func(V) bool) { + seq(func(v V) bool { + if !other.Contains(v) { + return yield(v) + } + return true + }) + } +} + +// Next extracts the next element from the iterator and advances it. +// +// This method consumes the next element from the iterator and returns it wrapped in an Option. +// The iterator itself is modified to point to the remaining elements. +// +// Returns: +// - Option[V]: Some(value) if an element exists, None if the iterator is exhausted. +func (seq *SeqSet[V]) Next() Option[V] { + var values []V + + (*seq)(func(v V) bool { + values = append(values, v) + return true + }) + + if len(values) == 0 { + return None[V]() + } + + first := Some(values[0]) + + *seq = func(yield func(V) bool) { + for _, value := range values[1:] { + if !yield(value) { + return + } + } + } + + return first +} + +func intersection[V comparable](seq SeqSet[V], other Set[V]) SeqSet[V] { + return func(yield func(V) bool) { + seq(func(v V) bool { + if other.Contains(v) { + return yield(v) + } + return true + }) + } +} diff --git a/backend/vendor/github.com/enetx/g/slice.go b/backend/vendor/github.com/enetx/g/slice.go new file mode 100644 index 0000000..693d089 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/slice.go @@ -0,0 +1,1086 @@ +package g + +import ( + "bytes" + "errors" + "fmt" + "slices" + "strconv" + "strings" + + "github.com/enetx/g/cmp" + "github.com/enetx/g/f" + "github.com/enetx/g/rand" + "github.com/enetx/iter" +) + +// NewSlice creates a new Slice of the given generic type T with the specified length and +// capacity. +// The size variadic parameter can have zero, one, or two integer values. +// If no values are provided, an empty Slice with a length and capacity of 0 is returned. +// If one value is provided, it sets both the length and capacity of the Slice. +// If two values are provided, the first value sets the length and the second value sets the +// capacity. +// +// Parameters: +// +// - size ...Int: A variadic parameter specifying the length and/or capacity of the Slice +// +// Returns: +// +// - Slice[T]: A new Slice of the specified generic type T with the given length and capacity +// +// Example usage: +// +// s1 := g.NewSlice[int]() // Creates an empty Slice of type int +// s2 := g.NewSlice[int](5) // Creates an Slice with length and capacity of 5 +// s3 := g.NewSlice[int](3, 10) // Creates an Slice with length of 3 and capacity of 10 +func NewSlice[T any](size ...Int) Slice[T] { + var ( + length Int + capacity Int + ) + + switch { + case len(size) > 1: + length, capacity = size[0], size[1] + case len(size) == 1: + length, capacity = size[0], size[0] + } + + return make(Slice[T], length, capacity) +} + +// TransformSlice applies the given function to each element of a Slice and returns a new Slice +// containing the transformed values. +// +// Parameters: +// +// - sl: The input Slice. +// +// - fn: The function to apply to each element of the input Slice. +// +// Returns: +// +// A new Slice containing the results of applying the function to each element of the input Slice. +func TransformSlice[T, U any](sl Slice[T], fn func(T) U) Slice[U] { + if len(sl) == 0 { + return NewSlice[U]() + } + + result := make(Slice[U], len(sl)) + for i, v := range sl { + result[i] = fn(v) + } + + return result +} + +// SliceOf creates a new generic slice containing the provided elements. +func SliceOf[T any](slice ...T) Slice[T] { return slice } + +// ToHeap converts the slice to a min/max heap with the specified comparison function. +// +// The comparison function should return: +// - cmp.Less if a < b (for min heap) +// - cmp.Greater if a > b (for max heap) +// - cmp.Equal if a == b +// +// Example usage: +// +// slice := g.SliceOf(5, 2, 8, 1, 9) +// +// minHeap := slice.ToHeap(cmp.Cmp[int]) // Min heap: Pop() returns smallest +// maxHeap := slice.ToHeap(func(a, b int) cmp.Ordering { +// return cmp.Cmp(b, a) +// }) // Max heap: Pop() returns largest +// +// Time complexity: O(n) +// Space complexity: O(n) - creates a copy of the slice +func (sl Slice[T]) ToHeap(compareFn func(T, T) cmp.Ordering) *Heap[T] { + if compareFn == nil { + panic("compareFn cannot be nil") + } + + h := &Heap[T]{ + data: make(Slice[T], len(sl)), + cmp: compareFn, + } + + copy(h.data, sl) + h.heapify() + + return h +} + +// Transform applies a transformation function to the Slice and returns the result. +func (sl Slice[T]) Transform(fn func(Slice[T]) Slice[T]) Slice[T] { return fn(sl) } + +// Iter returns an iterator (SeqSlice[T]) for the Slice, allowing for sequential iteration +// over its elements. It is commonly used in combination with higher-order functions, +// such as 'ForEach', to perform operations on each element of the Slice. +// +// Returns: +// +// A SeqSlice[T], which can be used for sequential iteration over the elements of the Slice. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5} +// iterator := slice.Iter() +// iterator.ForEach(func(element int) { +// // Perform some operation on each element +// fmt.Println(element) +// }) +// +// The 'Iter' method provides a convenient way to traverse the elements of a Slice +// in a functional style, enabling operations like mapping or filtering. +func (sl Slice[T]) Iter() SeqSlice[T] { return SeqSlice[T](iter.FromSlice(sl)) } + +// IterReverse returns an iterator (SeqSlice[T]) for the Slice that allows for sequential iteration +// over its elements in reverse order. This method is useful when you need to traverse the elements +// from the end to the beginning. +// +// Returns: +// +// A SeqSlice[T], which can be used for sequential iteration over the elements of the Slice in reverse order. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5} +// iterator := slice.IterReverse() +// iterator.ForEach(func(element int) { +// // Perform some operation on each element in reverse order +// fmt.Println(element) +// }) +// +// The 'IterReverse' method enhances the functionality of the Slice by providing an alternative +// way to iterate through its elements, enhancing flexibility in how data within a Slice is accessed and manipulated. +func (sl Slice[T]) IterReverse() SeqSlice[T] { return SeqSlice[T](iter.FromSliceReverse(sl)) } + +// AsAny converts each element of the slice to the 'any' type. +// It returns a new slice containing the elements as 'any' g.Slice[any]. +// +// Note: AsAny is useful when you want to work with a slice of a specific type as a slice of 'any'. +// It can be particularly handy in conjunction with Flatten to work with nested slices of different types. +func (sl Slice[T]) AsAny() Slice[any] { + if sl.Empty() { + return NewSlice[any]() + } + + result := make(Slice[any], len(sl)) + for i, v := range sl { + result[i] = any(v) + } + + return result +} + +// Fill fills the slice with the specified value. +// This function is useful when you want to create an Slice with all elements having the same +// value. +// This method modifies the original slice in place. +// +// Parameters: +// +// - val T: The value to fill the Slice with. +// +// Returns: +// +// - Slice[T]: A reference to the original Slice filled with the specified value. +// +// Example usage: +// +// slice := g.Slice[int]{0, 0, 0} +// slice.Fill(5) +// +// The modified slice will now contain: 5, 5, 5. +func (sl Slice[T]) Fill(val T) { + if len(sl) == 0 { + return + } + + if len(sl) > 32 { + sl[0] = val + for i := 1; i < len(sl); i <<= 1 { + copy(sl[i:], sl[:i]) + } + } else { + for i := range sl { + sl[i] = val + } + } +} + +// Index returns the index of the first occurrence of the specified value in the slice, or -1 if +// not found. +func (sl Slice[T]) Index(val T) Int { + var zero T + if f.IsComparable(zero) { + return sl.IndexBy(func(v T) bool { return f.Eq[any](v)(val) }) + } + + return sl.IndexBy(f.Eqd(val)) +} + +// IndexBy returns the index of the first element in the slice +// satisfying the custom comparison function provided by the user. +// It iterates through the slice and applies the comparison function to each element and the target value. +// If the comparison function returns true for any pair of elements, it returns the index of that element. +// If no such element is found, it returns -1. +func (sl Slice[T]) IndexBy(fn func(t T) bool) Int { return Int(slices.IndexFunc(sl, fn)) } + +// RandomSample returns a new slice containing a random sample of elements from the original slice. +// The sampling is done without replacement, meaning that each element can only appear once in the result. +// +// Parameters: +// +// - sequence int: The number of unique elements to include in the random sample. +// +// Returns: +// +// - Slice[T]: A new Slice containing the random sample of unique elements. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5, 6, 7, 8, 9} +// sample := slice.RandomSample(3) +// +// The resulting sample will contain 3 unique elements randomly selected from the original slice. +func (sl Slice[T]) RandomSample(sequence Int) Slice[T] { + if sequence >= sl.Len() { + return sl.Clone() + } + + if sequence <= 0 { + return Slice[T]{} + } + + n := sl.Len() + + if Float(sequence) < Float(n)*0.25 { + result := make(Slice[T], sequence) + swapped := make(map[Int]Int, sequence) + + for i := range sequence { + j := i + rand.N(n-i) + + vi, foundI := swapped[i] + if !foundI { + vi = i + } + + vj, foundJ := swapped[j] + if !foundJ { + vj = j + } + + swapped[i] = vj + if i != j { + swapped[j] = vi + } + + result[i] = sl[vj] + } + return result + } + + result := sl.Clone() + result.Shuffle() + + return result[:sequence] +} + +// RandomRange returns a new slice containing a random sample of elements from a subrange of the original slice. +// The sampling is done without replacement, meaning that each element can only appear once in the result. +func (sl Slice[T]) RandomRange(from, to Int) Slice[T] { + if from < 0 { + from = 0 + } + + if to < 0 || to > sl.Len() { + to = sl.Len() + } + + if from > to { + from = to + } + + return sl.RandomSample(from.RandomRange(to)) +} + +// Insert inserts values at the specified index in the slice and modifies the original +// slice. +// +// Parameters: +// +// - i Int: The index at which to insert the new values. +// +// - values ...T: A variadic list of values to insert at the specified index. +// +// Example usage: +// +// slice := g.Slice[string]{"a", "b", "c", "d"} +// slice.Insert(2, "e", "f") +// +// The resulting slice will be: ["a", "b", "e", "f", "c", "d"]. +func (sl *Slice[T]) Insert(i Int, values ...T) { + if sl.Empty() { + if i != 0 { + panic(Errorf("runtime error: slice bounds out of range [{}] with length 0", i)) + } + + sl.Push(values...) + return + } + + sl.Replace(i, i, values...) +} + +// Replace replaces the elements of sl[i:j] with the given values, +// and modifies the original slice in place. Replace panics if sl[i:j] +// is not a valid slice of sl. +// +// Parameters: +// +// - i int: The starting index of the slice to be replaced. +// +// - j int: The ending index of the slice to be replaced. +// +// - values ...T: A variadic list of values to replace the existing slice. +// +// Example usage: +// +// slice := g.Slice[string]{"a", "b", "c", "d"} +// slice.Replace(1, 3, "e", "f") +// +// After the Replace operation, the resulting slice will be: ["a", "e", "f", "d"]. +func (sl *Slice[T]) Replace(i, j Int, values ...T) { + ii := sl.bound(i) + jj := sl.bound(j) + + if ii.IsErr() { + panic(ii.err) + } + if jj.IsErr() { + panic(jj.err) + } + + i, j = ii.v, jj.v + + if i > j { + *sl = (*sl)[:0] + return + } + + oldLen := sl.Len() + removedCount := j - i + addedCount := Int(len(values)) + newLen := oldLen - removedCount + addedCount + + if i == j { + if addedCount == 0 { + return + } + + if newLen > sl.Cap() { + newSlice := make(Slice[T], newLen) + copy(newSlice[:i], (*sl)[:i]) + copy(newSlice[i:i+addedCount], values) + copy(newSlice[i+addedCount:], (*sl)[i:]) + *sl = newSlice + } else { + *sl = (*sl)[:newLen] + copy((*sl)[i+addedCount:], (*sl)[i:oldLen]) + copy((*sl)[i:], values) + } + return + } + + if newLen > sl.Cap() { + newSlice := make(Slice[T], newLen) + copy(newSlice[:i], (*sl)[:i]) + copy(newSlice[i:i+addedCount], values) + copy(newSlice[i+addedCount:], (*sl)[j:]) + *sl = newSlice + } else { + if newLen != oldLen { + *sl = (*sl)[:newLen] + } + + if addedCount != removedCount { + copy((*sl)[i+addedCount:], (*sl)[j:oldLen]) + } + + copy((*sl)[i:], values) + } +} + +// Get returns the element at the given index, handling negative indices as counting from the end +// of the slice. +func (sl Slice[T]) Get(index Int) Option[T] { + i := sl.bound(index) + if i.IsErr() { + return None[T]() + } + + return Some(sl[i.v]) +} + +// Shuffle shuffles the elements in the slice randomly. +// This method modifies the original slice in place. +// +// The function uses the crypto/rand package to generate random indices. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5} +// slice.Shuffle() +// fmt.Println(slice) +// +// Output: A randomly shuffled version of the original slice, e.g., [4 1 5 2 3]. +func (sl Slice[T]) Shuffle() { + for i := sl.Len() - 1; i > 0; i-- { + j := rand.N(i + 1) + sl.swap(i, j) + } +} + +// Reverse reverses the order of the elements in the slice. +// This method modifies the original slice in place. +// +// Returns: +// +// - Slice[T]: The modified slice with the elements reversed. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5} +// slice.Reverse() +// fmt.Println(slice) +// +// Output: [5 4 3 2 1]. +func (sl Slice[T]) Reverse() { slices.Reverse(sl) } + +// SortBy sorts the elements in the slice using the provided comparison function. +// It modifies the original slice in place. It requires the elements to be of a type +// that is comparable. +// +// The function takes a custom comparison function as an argument and sorts the elements +// of the slice using the provided logic. The comparison function should return true if +// the element at index i should come before the element at index j, and false otherwise. +// +// Parameters: +// +// - f func(a, b T) cmp.Ordered: A comparison function that takes two indices i and j and returns a bool. +// +// Example usage: +// +// sl := NewSlice[int](1, 5, 3, 2, 4) +// sl.SortBy(func(a, b int) cmp.Ordering { return cmp.Cmp(a, b) }) // sorts in ascending order. +func (sl Slice[T]) SortBy(fn func(a, b T) cmp.Ordering) { + slices.SortFunc(sl, func(a, b T) int { return int(fn(a, b)) }) +} + +// IsSortedBy checks if the slice is sorted according to the provided comparison function. +// +// The function takes a custom comparison function as an argument and checks if the elements +// are sorted according to the provided logic. +// +// Parameters: +// +// - fn func(a, b T) cmp.Ordering: A comparison function that defines the sort order. +// +// Returns: +// +// - bool: true if the slice is sorted according to the comparison function, false otherwise. +// +// Example usage: +// +// sl := g.SliceOf(1, 2, 3, 4, 5) +// sorted := sl.IsSortedBy(func(a, b int) cmp.Ordering { return cmp.Cmp(a, b) }) // returns true +func (sl Slice[T]) IsSortedBy(fn func(a, b T) cmp.Ordering) bool { + if len(sl) <= 1 { + return true + } + + for i := 1; i < len(sl); i++ { + if fn(sl[i-1], sl[i]).IsGt() { + return false + } + } + + return true +} + +// ToStringSlice converts the Slice into a slice of strings. +func (sl Slice[T]) ToStringSlice() []string { + if len(sl) == 0 { + return nil + } + + result := make([]string, len(sl)) + + for i, v := range sl { + switch val := any(v).(type) { + case String: + result[i] = val.Std() + case Int: + result[i] = strconv.FormatInt(int64(val), 10) + case Float: + result[i] = strconv.FormatFloat(float64(val), 'g', -1, 64) + case Bytes: + result[i] = string(val) + case string: + result[i] = val + case int: + result[i] = strconv.Itoa(val) + case int8: + result[i] = strconv.FormatInt(int64(val), 10) + case int16: + result[i] = strconv.FormatInt(int64(val), 10) + case int32: + result[i] = strconv.FormatInt(int64(val), 10) + case int64: + result[i] = strconv.FormatInt(val, 10) + case uint: + result[i] = strconv.FormatUint(uint64(val), 10) + case uint8: + result[i] = strconv.FormatUint(uint64(val), 10) + case uint16: + result[i] = strconv.FormatUint(uint64(val), 10) + case uint32: + result[i] = strconv.FormatUint(uint64(val), 10) + case uint64: + result[i] = strconv.FormatUint(val, 10) + case float32: + result[i] = strconv.FormatFloat(float64(val), 'g', -1, 32) + case float64: + result[i] = strconv.FormatFloat(val, 'g', -1, 64) + case bool: + result[i] = strconv.FormatBool(val) + default: + if stringer, ok := any(v).(fmt.Stringer); ok { + result[i] = stringer.String() + } else { + result[i] = fmt.Sprint(v) + } + } + } + + return result +} + +// Join joins the elements in the slice into a single String, separated by the provided separator (if any). +func (sl Slice[T]) Join(sep ...T) String { + if sl.Empty() { + return "" + } + + if s, ok := any(sl).(Slice[Bytes]); ok { + var separator Bytes + if len(sep) != 0 { + separator, _ = any(sep[0]).(Bytes) + } + + return String(bytes.Join(TransformSlice(s, func(b Bytes) []byte { return b }), separator)) + } + + if s, ok := any(sl).(Slice[String]); ok { + var separator string + if len(sep) != 0 { + if sepStr, ok := any(sep[0]).(String); ok { + separator = sepStr.Std() + } else { + separator = fmt.Sprint(sep[0]) + } + } + + strs := make([]string, len(s)) + for i, str := range s { + strs[i] = str.Std() + } + + return String(strings.Join(strs, separator)) + } + + var separator string + if len(sep) != 0 { + separator = fmt.Sprint(sep[0]) + } + + return String(strings.Join(sl.ToStringSlice(), separator)) +} + +// SubSlice returns a new slice containing elements from the current slice between the specified start +// and end indices, with an optional step parameter to define the increment between elements. +// The function checks if the start and end indices are within the bounds of the original slice. +// If the end index is negative, it represents the position from the end of the slice. +// If the start index is negative, it represents the position from the end of the slice counted +// from the start index. +// +// Parameters: +// +// - start (Int): The start index of the range. +// +// - end (Int): The end index of the range. +// +// - step (Int, optional): The increment between elements. Defaults to 1 if not provided. +// If negative, the slice is traversed in reverse order. +// +// Returns: +// +// - Slice[T]: A new slice containing elements from the current slice between the start and end +// indices, with the specified step. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5, 6, 7, 8, 9} +// subSlice := slice.SubSlice(1, 7, 2) // Extracts elements 2, 4, 6 +// fmt.Println(subSlice) +// +// Output: [2 4 6]. +func (sl Slice[T]) SubSlice(start, end Int, step ...Int) Slice[T] { + if sl.Empty() { + return sl + } + + _step := Slice[Int](step).Get(0).UnwrapOr(1) + + ii := sl.bound(start, struct{}{}) + jj := sl.bound(end, struct{}{}) + + if ii.IsErr() { + panic(ii.err) + } + + if jj.IsErr() { + panic(jj.err) + } + + start, end = ii.v, jj.v + + if _step == 1 { + if start >= end { + return NewSlice[T]() + } + + return slices.Clone(sl[start:end]) + } + + if (start >= end && _step > 0) || (start <= end && _step < 0) || _step == 0 { + return NewSlice[T]() + } + + var resultSize Int + if _step > 0 { + resultSize = (end - start + _step - 1) / _step + } else { + resultSize = (start - end + (-_step) - 1) / (-_step) + } + + slice := make(Slice[T], 0, resultSize) + + var loopCondition func(Int) bool + if _step > 0 { + loopCondition = func(i Int) bool { return i < end } + } else { + loopCondition = func(i Int) bool { return i > end } + } + + for i := start; loopCondition(i); i += _step { + slice = append(slice, sl[i]) + } + + return slice +} + +// Random returns a random element from the slice. +// +// The function uses the crypto/rand package to generate a random index within the bounds of the +// slice. If the slice is empty, the zero value of type T is returned. +// +// Returns: +// +// - T: A random element from the slice. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5} +// randomElement := slice.Random() +// fmt.Println(randomElement) +// +// Output: . +func (sl Slice[T]) Random() T { + if sl.Empty() { + var zero T + return zero + } + + return sl[rand.N(sl.Len())] +} + +// Clone returns a copy of the slice. +func (sl Slice[T]) Clone() Slice[T] { + if sl.Empty() { + return NewSlice[T]() + } + + return slices.Clone(sl) +} + +// LastIndex returns the last index of the slice. +func (sl Slice[T]) LastIndex() Int { + if sl.NotEmpty() { + return sl.Len() - 1 + } + + return 0 +} + +// Eq returns true if the slice is equal to the provided other slice. +func (sl Slice[T]) Eq(other Slice[T]) bool { + var zero T + if f.IsComparable(zero) { + return sl.EqBy(other, func(x, y T) bool { return f.Eq[any](x)(y) }) + } + + return sl.EqBy(other, func(x, y T) bool { return f.Eqd(x)(y) }) +} + +// EqBy reports whether two slices are equal using an equality +// function on each pair of elements. If the lengths are different, +// EqBy returns false. Otherwise, the elements are compared in +// increasing index order, and the comparison stops at the first index +// for which eq returns false. +func (sl Slice[T]) EqBy(other Slice[T], fn func(x, y T) bool) bool { + return slices.EqualFunc(sl, other, fn) +} + +// String returns a string representation of the slice. +func (sl Slice[T]) String() string { + if len(sl) == 0 { + return "Slice[]" + } + + var b Builder + b.WriteString("Slice[") + + for i, v := range sl { + if i > 0 { + b.WriteString(", ") + } + + b.WriteString(Format("{}", v)) + } + + b.WriteString("]") + + return b.String().Std() +} + +// Append appends the provided elements to the slice and returns the modified slice. +func (sl Slice[T]) Append(elems ...T) Slice[T] { return append(sl, elems...) } + +// AppendUnique appends unique elements from the provided arguments to the current slice. +// +// The function iterates over the provided elements and checks if they are already present +// in the slice. If an element is not already present, it is appended to the slice. The +// resulting slice is returned, containing the unique elements from both the original +// slice and the provided elements. +// +// Parameters: +// +// - elems (...T): A variadic list of elements to be appended to the slice. +// +// Returns: +// +// - Slice[T]: A new slice containing the unique elements from both the original slice +// and the provided elements. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5} +// slice = slice.AppendUnique(3, 4, 5, 6, 7) +// fmt.Println(slice) +// +// Output: [1 2 3 4 5 6 7]. +func (sl Slice[T]) AppendUnique(elems ...T) Slice[T] { + for _, elem := range elems { + if !sl.Contains(elem) { + sl = append(sl, elem) + } + } + + return sl +} + +// Push appends the provided elements to the slice and modifies the original slice. +func (sl *Slice[T]) Push(elems ...T) { *sl = append(*sl, elems...) } + +// PushUnique appends unique elements from the provided arguments to the current slice. +// +// The function iterates over the provided elements and checks if they are already present +// in the slice. If an element is not already present, it is appended to the slice. +// +// Parameters: +// +// - elems (...T): A variadic list of elements to be appended to the slice. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5} +// slice.PushUnique(3, 4, 5, 6, 7) +// fmt.Println(slice) +// +// Output: [1 2 3 4 5 6 7]. +func (sl *Slice[T]) PushUnique(elems ...T) { + for _, elem := range elems { + if !sl.Contains(elem) { + sl.Push(elem) + } + } +} + +// Cap returns the capacity of the Slice. +func (sl Slice[T]) Cap() Int { return Int(cap(sl)) } + +// Contains returns true if the slice contains the provided value. +func (sl Slice[T]) Contains(val T) bool { return sl.Index(val) >= 0 } + +// ContainsBy returns true if the slice contains an element that satisfies the provided function fn, false otherwise. +func (sl Slice[T]) ContainsBy(fn func(t T) bool) bool { return sl.IndexBy(fn) >= 0 } + +// ContainsAny checks if the Slice contains any element from another Slice. +func (sl Slice[T]) ContainsAny(values ...T) bool { + if sl.Empty() || len(values) == 0 { + return false + } + + return slices.ContainsFunc(values, sl.Contains) +} + +// ContainsAll checks if the Slice contains all elements from another Slice. +func (sl Slice[T]) ContainsAll(values ...T) bool { + if sl.Empty() || len(values) == 0 { + return len(values) == 0 + } + + for _, v := range values { + if !sl.Contains(v) { + return false + } + } + + return true +} + +// Delete removes an element or a range of elements from the Slice in-place. +// It modifies the original Slice by creating two slices: one from the +// beginning of the Slice up to the specified `start` index (exclusive), +// and another from the `end` index (inclusive) to the end of the Slice. +// These two slices are then concatenated to form the modified Slice. +// +// Parameters: +// +// - start (Int): The starting index of the element or range to be removed. +// - end (Int, optional): The end index of the range to be removed. +// If omitted, only the element at the `start` index is removed. +// +// Note: +// +// The function supports negative indices. Negative values are counted from +// the end of the Slice: for example, -1 refers to the last element, -2 to +// the second-to-last, and so on. +func (sl *Slice[T]) Delete(start Int, end ...Int) { + sl.Replace(start, Slice[Int](end).Get(0).UnwrapOr(start+1)) +} + +// Empty returns true if the slice is empty. +func (sl Slice[T]) Empty() bool { return len(sl) == 0 } + +// Last returns the last element of the slice. +func (sl Slice[T]) Last() Option[T] { return sl.Get(-1) } + +// Ne returns true if the slice is not equal to the provided other slice. +func (sl Slice[T]) Ne(other Slice[T]) bool { return !sl.Eq(other) } + +// NeBy reports whether two slices are not equal using an inequality +// function on each pair of elements. If the lengths are different, +// NeBy returns true. Otherwise, the elements are compared in +// increasing index order, and the comparison stops at the first index +// for which fn returns true. +func (sl Slice[T]) NeBy(other Slice[T], fn func(x, y T) bool) bool { return !sl.EqBy(other, fn) } + +// NotEmpty checks if the Slice is not empty. +func (sl Slice[T]) NotEmpty() bool { return !sl.Empty() } + +// Pop removes and returns the last element of the slice. +// It mutates the original slice by removing the last element. +// It returns None if the slice is empty. +func (sl *Slice[T]) Pop() Option[T] { + if sl.Len() == 0 { + return None[T]() + } + + last := (*sl)[sl.Len()-1] + *sl = (*sl)[:sl.Len()-1] + + return Some(last) +} + +// Set sets the value at the specified index in the slice and returns the modified slice. +// This method modifies the original slice in place. +// +// Parameters: +// +// - index (Int): The index at which to set the new value. +// - val (T): The new value to be set at the specified index. +// +// Returns: +// +// - Slice[T]: The modified slice with the new value set at the specified index. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5} +// slice.Set(2, 99) +// fmt.Println(slice) +// +// Output: [1 2 99 4 5]. +func (sl Slice[T]) Set(index Int, val T) { + i := sl.bound(index) + if i.IsErr() { + panic(i.err) + } + + sl[i.v] = val +} + +// Len returns the length of the slice. +func (sl Slice[T]) Len() Int { return Int(len(sl)) } + +// Swap swaps the elements at the specified indices in the slice. +// This method modifies the original slice in place. +// +// Parameters: +// +// - i (Int): The index of the first element to be swapped. +// +// - j (Int): The index of the second element to be swapped. +// +// Returns: +// +// - Slice[T]: The modified slice with the elements at the specified indices swapped. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5} +// slice.Swap(1, 3) +// fmt.Println(slice) +// +// Output: [1 4 3 2 5]. +func (sl Slice[T]) Swap(i, j Int) { + ii := sl.bound(i) + jj := sl.bound(j) + + if ii.IsErr() { + panic(ii.err) + } + + if jj.IsErr() { + panic(jj.err) + } + + sl.swap(ii.v, jj.v) +} + +func (sl Slice[T]) swap(i, j Int) { sl[i], sl[j] = sl[j], sl[i] } + +// Grow increases the slice's capacity, if necessary, to guarantee space for +// another n elements. After Grow(n), at least n elements can be appended +// to the slice without another allocation. If n is negative or too large to +// allocate the memory, Grow panics. +func (sl Slice[T]) Grow(n Int) Slice[T] { return slices.Grow(sl, n.Std()) } + +// Clip removes unused capacity from the slice. +func (sl Slice[T]) Clip() Slice[T] { return slices.Clip(sl) } + +// Std returns a new slice with the same elements as the Slice[T]. +func (sl Slice[T]) Std() []T { return sl } + +// Print writes the elements of the Slice to the standard output (console) +// and returns the Slice unchanged. +func (sl Slice[T]) Print() Slice[T] { fmt.Print(sl); return sl } + +// Println writes the elements of the Slice to the standard output (console) with a newline +// and returns the Slice unchanged. +func (sl Slice[T]) Println() Slice[T] { fmt.Println(sl); return sl } + +// Unpack assigns values of the slice's elements to the variables passed as pointers. +// If the number of variables passed is greater than the length of the slice, +// the function ignores the extra variables. +// +// Parameters: +// +// - vars (...*T): Pointers to variables where the values of the slice's elements will be stored. +// +// Example: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5} +// var a, b, c int +// slice.Unpack(&a, &b, &c) +// fmt.Println(a, b, c) // Output: 1 2 3 +func (sl Slice[T]) Unpack(vars ...*T) { + n := min(len(sl), len(vars)) + + for i := range n { + if vars[i] != nil { + *vars[i] = sl[i] + } + } +} + +// MaxBy returns the maximum value in the slice according to the provided comparison function fn. +// It applies fn pairwise to the elements of the slice until it finds the maximum value. +// It returns the maximum value found. +// +// Example: +// +// s := Slice[int]{3, 1, 4, 2, 5} +// maxInt := s.MaxBy(cmp.Cmp) +// fmt.Println(maxInt) // Output: 5 +func (sl Slice[T]) MaxBy(fn func(a, b T) cmp.Ordering) T { return cmp.MaxBy(fn, sl...) } + +// MinBy returns the minimum value in the slice according to the provided comparison function fn. +// It applies fn pairwise to the elements of the slice until it finds the minimum value. +// It returns the minimum value found. +// +// Example: +// +// s := Slice[int]{3, 1, 4, 2, 5} +// minInt := s.MinBy(cmp.Cmp) +// fmt.Println(minInt) // Output: 1 +func (sl Slice[T]) MinBy(fn func(a, b T) cmp.Ordering) T { return cmp.MinBy(fn, sl...) } + +func (sl Slice[T]) bound(i Int, subslice ...struct{}) Result[Int] { + if sl.Empty() { + return Err[Int](errors.New("runtime error: slice is empty")) + } + + ii := i + if ii < 0 { + ii += sl.Len() + } + + var negative Int + if len(subslice) != 0 { + negative = -1 + } + + if ii > sl.Len() || ii < negative { + return Err[Int](Errorf("runtime error: slice bounds out of range [{}] with length {}", i, len(sl))) + } + + return Ok(ii) +} diff --git a/backend/vendor/github.com/enetx/g/slice_iter.go b/backend/vendor/github.com/enetx/g/slice_iter.go new file mode 100644 index 0000000..39cd0c1 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/slice_iter.go @@ -0,0 +1,1062 @@ +package g + +import ( + "context" + "reflect" + "runtime" + + "github.com/enetx/g/cmp" + "github.com/enetx/g/constraints" + "github.com/enetx/g/f" + "github.com/enetx/iter" +) + +// Parallel runs this SeqSlice in parallel using the given number of workers. +func (seq SeqSlice[V]) Parallel(workers ...Int) SeqSlicePar[V] { + numCPU := Int(runtime.NumCPU()) + count := Slice[Int](workers).Get(0).UnwrapOr(numCPU) + + if count.Lte(0) { + count = numCPU + } + + return SeqSlicePar[V]{ + seq: seq, + workers: count, + process: func(v V) (V, bool) { return v, true }, + } +} + +// Range returns a SeqSlice[T] yielding a sequence of integers of type T, +// starting at start, incrementing by step, and ending before stop (exclusive). +// +// - If step is omitted, it defaults to 1. +// - If step is 0, the sequence is empty. +// - If step does not move toward stop (e.g., positive step with start > stop), +// the sequence is empty. +// +// Examples: +// - Range(0, 5) yields [0, 1, 2, 3, 4] +// - Range(5, 0, -1) yields [5, 4, 3, 2, 1] +func Range[T constraints.Integer](start, stop T, step ...T) SeqSlice[T] { + return SeqSlice[T](iter.Iota(start, stop, step...)) +} + +// RangeInclusive returns a SeqSlice[T] yielding a sequence of integers of type T, +// starting at start, incrementing by step, and ending at stop (inclusive). +// +// - If step is omitted, it defaults to 1. +// - If step is 0, the sequence is empty. +// - If step does not move toward stop (e.g., positive step with start > stop), +// the sequence is empty. +// +// Examples: +// - RangeInclusive(0, 5) yields [0, 1, 2, 3, 4, 5] +// - RangeInclusive(5, 0, -1) yields [5, 4, 3, 2, 1, 0] +func RangeInclusive[T constraints.Integer](start, stop T, step ...T) SeqSlice[T] { + return SeqSlice[T](iter.IotaInclusive(start, stop, step...)) +} + +// Pull converts the "push-style" iterator sequence seq +// into a "pull-style" iterator accessed by the two functions +// next and stop. +// +// Next returns the next value in the sequence +// and a boolean indicating whether the value is valid. +// When the sequence is over, next returns the zero V and false. +// It is valid to call next after reaching the end of the sequence +// or after calling stop. These calls will continue +// to return the zero V and false. +// +// Stop ends the iteration. It must be called when the caller is +// no longer interested in next values and next has not yet +// signaled that the sequence is over (with a false boolean return). +// It is valid to call stop multiple times and when next has +// already returned false. +// +// It is an error to call next or stop from multiple goroutines +// simultaneously. +func (seq SeqSlice[V]) Pull() (func() (V, bool), func()) { return iter.Pull(iter.Seq[V](seq)) } + +// All checks whether all elements in the iterator satisfy the provided condition. +// This function is useful when you want to determine if all elements in an iterator +// meet a specific criteria. +// +// Parameters: +// - fn func(V) bool: A function that returns a boolean indicating whether the element satisfies +// the condition. +// +// Returns: +// - bool: True if all elements in the iterator satisfy the condition, false otherwise. +// +// Example usage: +// +// slice := g.SliceOf(1, 2, 3, 4, 5, 6, 7, -1, -2) +// isPositive := func(num int) bool { return num > 0 } +// allPositive := slice.Iter().All(isPositive) +// +// The resulting allPositive will be true if all elements returned by the iterator are positive. +func (seq SeqSlice[V]) All(fn func(v V) bool) bool { return iter.All(iter.Seq[V](seq), fn) } + +// Any checks whether any element in the iterator satisfies the provided condition. +// This function is useful when you want to determine if at least one element in an iterator +// meets a specific criteria. +// +// Parameters: +// - fn func(V) bool: A function that returns a boolean indicating whether the element satisfies +// the condition. +// +// Returns: +// - bool: True if at least one element in the iterator satisfies the condition, false otherwise. +// +// Example usage: +// +// slice := g.Slice[int]{1, 3, 5, 7, 9} +// isEven := func(num int) bool { return num%2 == 0 } +// anyEven := slice.Iter().Any(isEven) +// +// The resulting anyEven will be true if at least one element returned by the iterator is even. +func (seq SeqSlice[V]) Any(fn func(V) bool) bool { return iter.Any(iter.Seq[V](seq), fn) } + +// Chain concatenates the current iterator with other iterators, returning a new iterator. +// +// The function creates a new iterator that combines the elements of the current iterator +// with elements from the provided iterators in the order they are given. +// +// Params: +// +// - seqs ([]SeqSlice[V]): Other iterators to be concatenated with the current iterator. +// +// Returns: +// +// - sequence[V]: A new iterator containing elements from the current iterator and the provided iterators. +// +// Example usage: +// +// iter1 := g.Slice[int]{1, 2, 3}.Iter() +// iter2 := g.Slice[int]{4, 5, 6}.Iter() +// iter1.Chain(iter2).Collect().Print() +// +// Output: [1, 2, 3, 4, 5, 6] +// +// The resulting iterator will contain elements from both iterators in the specified order. +func (seq SeqSlice[V]) Chain(seqs ...SeqSlice[V]) SeqSlice[V] { + iterSeqs := make([]iter.Seq[V], len(seqs)) + for i, s := range seqs { + iterSeqs[i] = iter.Seq[V](s) + } + + return SeqSlice[V](iter.Chain(iter.Seq[V](seq), iterSeqs...)) +} + +// Chunks returns an iterator that yields chunks of elements of the specified size. +// +// The function creates a new iterator that yields chunks of elements from the original iterator, +// with each chunk containing elements of the specified size. +// +// Params: +// +// - n (Int): The size of each chunk. +// +// Returns: +// +// - SeqSlices[V]: An iterator yielding chunks of elements of the specified size. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5, 6} +// chunks := slice.Iter().Chunks(2).Collect() +// +// Output: [Slice[1, 2] Slice[3, 4] Slice[5, 6]] +// +// The resulting iterator will yield chunks of elements, each containing the specified number of elements. +func (seq SeqSlice[V]) Chunks(n Int) SeqSlices[V] { + return SeqSlices[V](iter.Chunks(iter.Seq[V](seq), int(n))) +} + +// Collect gathers all elements from the iterator into a Slice. +func (seq SeqSlice[V]) Collect() Slice[V] { return iter.ToSlice(iter.Seq[V](seq)) } + +// Collect gathers all elements from the iterator into a []Slice. +func (seqs SeqSlices[V]) Collect() []Slice[V] { + collection := make([]Slice[V], 0) + + seqs(func(v []V) bool { + inner := SeqSlice[V](iter.FromSlice(v)).Collect() + collection = append(collection, inner) + return true + }) + + return collection +} + +// Count consumes the iterator, counting the number of iterations and returning it. +func (seq SeqSlice[V]) Count() Int { return Int(iter.Count(iter.Seq[V](seq))) } + +// Counter returns a map where each key is a unique element +// from the slice and each value is the count of how many times that element appears. +// +// The function counts the occurrences of each element in the slice +// and returns a map representing the unique elements and their respective counts. +// This method uses iter.Counter from the iter package. +// +// Returns: +// +// - map[any]Int: with keys representing the unique elements in the slice +// and values representing the counts of those elements. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 1, 2, 1} +// counts := slice.Iter().Counter() +// // The counts map will contain: +// // 1 -> 3 (since 1 appears three times) +// // 2 -> 2 (since 2 appears two times) +// // 3 -> 1 (since 3 appears once) +func (seq SeqSlice[V]) Counter() SeqMapOrd[any, Int] { + return func(yield func(any, Int) bool) { + for k, v := range iter.Counter(iter.Seq[V](seq)) { + if !yield(k, Int(v)) { + return + } + } + } +} + +// GroupBy groups consecutive elements of the sequence based on a custom equality function. +// +// The provided function `fn` takes two consecutive elements `a` and `b` and returns `true` +// if they belong to the same group, or `false` if a new group should start. +// The function returns a `SeqSlices[V]`, where each `[]V` represents a group of consecutive +// elements that satisfy the provided equality condition. +// +// Notes: +// - Each group is returned as a copy of the elements, since `SeqSlice` does not guarantee +// that elements share the same backing array. +// +// Parameters: +// - fn (func(a, b V) bool): Function that determines whether two consecutive elements belong to the same group. +// +// Returns: +// - SeqSlices[V]: An iterator yielding slices, each containing one group. +// +// Example usage: +// +// slice := g.SliceOf(1, 1, 2, 3, 2, 3, 4) +// groups := slice.Iter().GroupBy(func(a, b int) bool { return a <= b }).Collect() +// // Output: [Slice[1, 1, 2, 3] Slice[2, 3, 4]] +// +// The resulting iterator will yield groups of consecutive elements according to the provided function. +func (seq SeqSlice[V]) GroupBy(fn func(a, b V) bool) SeqSlices[V] { + return SeqSlices[V](iter.GroupByAdjacent(iter.Seq[V](seq), fn)) +} + +// Combinations generates all combinations of length 'n' from the sequence. +func (seq SeqSlice[V]) Combinations(size Int) SeqSlices[V] { + return SeqSlices[V](iter.Combinations(iter.Seq[V](seq), int(size))) +} + +// Cycle returns an iterator that endlessly repeats the elements of the current sequence. +func (seq SeqSlice[V]) Cycle() SeqSlice[V] { + return SeqSlice[V](iter.Cycle(iter.Seq[V](seq))) +} + +// Enumerate adds an index to each element in the iterator. +// +// Returns: +// +// - SeqMapOrd[Int, V] An iterator with each element of type Pair[Int, V], where the first +// element of the pair is the index and the second element is the original element from the +// iterator. +// +// Example usage: +// +// ps := g.SliceOf[g.String]("bbb", "ddd", "xxx", "aaa", "ccc"). +// Iter(). +// Enumerate(). +// Collect() +// +// ps.Print() +// +// Output: MapOrd{0:bbb, 1:ddd, 2:xxx, 3:aaa, 4:ccc} +func (seq SeqSlice[V]) Enumerate() SeqMapOrd[Int, V] { + return func(yield func(Int, V) bool) { + iterEnum := iter.Enumerate(iter.Seq[V](seq), 0) + iterEnum(func(i int, v V) bool { + return yield(Int(i), v) + }) + } +} + +// Dedup creates a new iterator that removes consecutive duplicate elements from the original iterator, +// leaving only one occurrence of each unique element. If the iterator is sorted, all elements will be unique. +// +// Parameters: +// - None +// +// Returns: +// - SeqSlice[V]: A new iterator with consecutive duplicates removed. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 2, 3, 4, 4, 4, 5} +// iter := slice.Iter().Dedup() +// result := iter.Collect() +// result.Print() +// +// Output: [1 2 3 4 5] +// +// The resulting iterator will contain only unique elements, removing consecutive duplicates. +func (seq SeqSlice[V]) Dedup() SeqSlice[V] { + return SeqSlice[V](iter.DedupBy(iter.Seq[V](seq), func(a, b V) bool { + if f.IsComparable(a) { + return f.Eq[any](a)(b) + } + return f.Eqd(a)(b) + })) +} + +// Filter returns a new iterator containing only the elements that satisfy the provided function. +// +// The function applies the provided function to each element of the iterator. +// If the function returns true for an element, that element is included in the resulting iterator. +// +// Parameters: +// +// - fn (func(V) bool): The function to be applied to each element of the iterator +// to determine if it should be included in the result. +// +// Returns: +// +// - SeqSlice[V]: A new iterator containing the elements that satisfy the given condition. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5} +// even := slice.Iter(). +// Filter( +// func(val int) bool { +// return val%2 == 0 +// }). +// Collect() +// even.Print() +// +// Output: [2 4]. +// +// The resulting iterator will contain only the elements that satisfy the provided function. +func (seq SeqSlice[V]) Filter(fn func(V) bool) SeqSlice[V] { + return SeqSlice[V](iter.Filter(iter.Seq[V](seq), fn)) +} + +// Exclude returns a new iterator excluding elements that satisfy the provided function. +// +// The function applies the provided function to each element of the iterator. +// If the function returns true for an element, that element is excluded from the resulting iterator. +// +// Parameters: +// +// - fn (func(V) bool): The function to be applied to each element of the iterator +// to determine if it should be excluded from the result. +// +// Returns: +// +// - SeqSlice[V]: A new iterator containing the elements that do not satisfy the given condition. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5} +// notEven := slice.Iter(). +// Exclude( +// func(val int) bool { +// return val%2 == 0 +// }). +// Collect() +// notEven.Print() +// +// Output: [1, 3, 5] +// +// The resulting iterator will contain only the elements that do not satisfy the provided function. +func (seq SeqSlice[V]) Exclude(fn func(V) bool) SeqSlice[V] { + return SeqSlice[V](iter.Exclude(iter.Seq[V](seq), fn)) +} + +// Fold accumulates values in the iterator using a function. +// +// The function iterates through the elements of the iterator, accumulating values +// using the provided function and an initial value. +// +// Params: +// +// - init (V): The initial value for accumulation. +// - fn (func(V, V) V): The function that accumulates values; it takes two arguments +// of type V and returns a value of type V. +// +// Returns: +// +// - T: The accumulated value after applying the function to all elements. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5} +// sum := slice.Iter(). +// Fold(0, +// func(acc, val int) int { +// return acc + val +// }) +// fmt.Println(sum) +// +// Output: 15. +// +// The resulting value will be the accumulation of elements based on the provided function. +func (seq SeqSlice[V]) Fold(init V, fn func(acc, val V) V) V { + return iter.Fold(iter.Seq[V](seq), init, fn) +} + +// Reduce aggregates elements of the sequence using the provided function. +// The first element of the sequence is used as the initial accumulator value. +// If the sequence is empty, it returns None[V]. +// +// Params: +// - fn (func(V, V) V): Function that combines two values into one. +// +// Returns: +// - Option[V]: The accumulated value wrapped in Some, or None if the sequence is empty. +// +// Example: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5} +// product := slice.Iter().Reduce(func(a, b int) int { return a * b }) +// if product.IsSome() { +// fmt.Println(product.Some()) // 120 +// } else { +// fmt.Println("empty") +// } +func (seq SeqSlice[V]) Reduce(fn func(a, b V) V) Option[V] { + return OptionOf(iter.Reduce(iter.Seq[V](seq), fn)) +} + +// ForEach iterates through all elements and applies the given function to each. +// +// The function applies the provided function to each element of the iterator. +// +// Params: +// +// - fn (func(V)): The function to apply to each element. +// +// Example usage: +// +// iter := g.Slice[int]{1, 2, 3, 4, 5}.Iter() +// iter.ForEach(func(val V) { +// fmt.Println(val) // Replace this with the function logic you need. +// }) +// +// The provided function will be applied to each element in the iterator. +func (seq SeqSlice[V]) ForEach(fn func(v V)) { iter.ForEach(iter.Seq[V](seq), fn) } + +// Flatten flattens an iterator of iterators into a single iterator. +// +// The function creates a new iterator that flattens a sequence of iterators, +// returning a single iterator containing elements from each iterator in sequence. +// +// Returns: +// +// - SeqSlice[V]: A single iterator containing elements from the sequence of iterators. +// +// Example usage: +// +// nestedSlice := g.Slice[any]{ +// 1, +// g.SliceOf(2, 3), +// "abc", +// g.SliceOf("def", "ghi"), +// g.SliceOf(4.5, 6.7), +// } +// +// nestedSlice.Iter().Flatten().Collect().Print() +// +// Output: Slice[1, 2, 3, abc, def, ghi, 4.5, 6.7] +// +// The resulting iterator will contain elements from each iterator in sequence. +func (seq SeqSlice[V]) Flatten() SeqSlice[V] { + return func(yield func(V) bool) { + var flatten func(item any) bool + flatten = func(item any) bool { + rv := reflect.ValueOf(item) + switch rv.Kind() { + case reflect.Slice, reflect.Array: + for i := range rv.Len() { + if !flatten(rv.Index(i).Interface()) { + return false + } + } + default: + if v, ok := item.(V); ok { + if !yield(v) { + return false + } + } + } + return true + } + + seq(func(item V) bool { + return flatten(item) + }) + } +} + +// Inspect creates a new iterator that wraps around the current iterator +// and allows inspecting each element as it passes through. +func (seq SeqSlice[V]) Inspect(fn func(v V)) SeqSlice[V] { + return SeqSlice[V](iter.Inspect(iter.Seq[V](seq), fn)) +} + +// Intersperse inserts the provided separator between elements of the iterator. +// +// The function creates a new iterator that inserts the given separator between each +// consecutive pair of elements in the original iterator. +// +// Params: +// +// - sep (V): The separator to intersperse between elements. +// +// Returns: +// +// - SeqSlice[V]: An iterator containing elements with the separator interspersed. +// +// Example usage: +// +// g.Slice[string]{"Hello", "World", "!"}. +// Iter(). +// Intersperse(" "). +// Collect(). +// Join(). +// Print() +// +// Output: "Hello World !". +// +// The resulting iterator will contain elements with the separator interspersed. +func (seq SeqSlice[V]) Intersperse(sep V) SeqSlice[V] { + return SeqSlice[V](iter.Intersperse(iter.Seq[V](seq), sep)) +} + +// Map transforms each element in the iterator using the given function. +// +// The function creates a new iterator by applying the provided function to each element +// of the original iterator. +// +// Params: +// +// - fn (func(V) V): The function used to transform elements. +// +// Returns: +// +// - SeqSlice[V]: A iterator containing elements transformed by the provided function. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3} +// doubled := slice. +// Iter(). +// Map( +// func(val int) int { +// return val * 2 +// }). +// Collect() +// doubled.Print() +// +// Output: [2 4 6]. +// +// The resulting iterator will contain elements transformed by the provided function. +func (seq SeqSlice[V]) Map(transform func(V) V) SeqSlice[V] { + return SeqSlice[V](iter.Map(iter.Seq[V](seq), transform)) +} + +// FlatMap applies a function to each element that returns an iterator, then flattens the results. +// +// The function transforms each element into a sequence and then concatenates all sequences +// into a single flat sequence. +// +// Params: +// +// - fn (func(V) SeqSlice[V]): The function that transforms each element into a sequence. +// +// Returns: +// +// - SeqSlice[V]: A flattened sequence containing all elements from the transformed sequences. +// +// Example usage: +// +// words := g.Slice[string]{"hello world", "foo bar"}.Iter() +// chars := words.FlatMap(func(s string) SeqSlice[string] { +// return g.String(s).Split("") +// }) +// // chars will yield: "h", "e", "l", "l", "o", " ", "w", "o", "r", "l", "d", "f", "o", "o", " ", "b", "a", "r" +// +// numbers := g.Slice[int]{1, 2, 3}.Iter() +// expanded := numbers.FlatMap(func(n int) SeqSlice[int] { +// return g.Slice[int]{n, n*10, n*100}.Iter() +// }) +// // expanded will yield: 1, 10, 100, 2, 20, 200, 3, 30, 300 +func (seq SeqSlice[V]) FlatMap(fn func(V) SeqSlice[V]) SeqSlice[V] { + mapped := iter.MapTo(iter.Seq[V](seq), func(v V) iter.Seq[V] { + return iter.Seq[V](fn(v)) + }) + + return SeqSlice[V](iter.FlattenSeq(mapped)) +} + +// FilterMap applies a function to each element and filters out None results. +// +// The function transforms and filters in a single pass. Elements where the function +// returns None are filtered out, and elements where it returns Some are unwrapped +// and included in the result. +// +// Params: +// +// - fn (func(V) Option[V]): The function that transforms and filters elements. +// Returns Some(value) to include the transformed value, or None to filter it out. +// +// Returns: +// +// - SeqSlice[V]: A sequence containing only the successfully transformed elements. +// +// Example usage: +// +// strings := g.Slice[string]{"1", "2", "abc", "3", "xyz"}.Iter() +// numbers := strings.FilterMap(func(s string) Option[int] { +// if n, err := strconv.Atoi(s); err == nil { +// return Some(n) +// } +// return None[int]() +// }) +// // numbers will yield: 1, 2, 3 +// +// values := g.Slice[int]{1, -2, 3, -4, 5}.Iter() +// positiveDoubled := values.FilterMap(func(n int) Option[int] { +// if n > 0 { +// return Some(n * 2) +// } +// return None[int]() +// }) +// // positiveDoubled will yield: 2, 6, 10 +func (seq SeqSlice[V]) FilterMap(fn func(V) Option[V]) SeqSlice[V] { + return SeqSlice[V](iter.FilterMap(iter.Seq[V](seq), func(v V) (V, bool) { + return fn(v).Option() + })) +} + +// transformSeq converts a standard library iter.Seq[V] into a SeqSlice[U] by mapping each element +// with the provided transformation function `fn`. +func transformSeq[V, U any](seq func(func(V) bool), fn func(V) U) SeqSlice[U] { + return func(yield func(U) bool) { + seq(func(v V) bool { + return yield(fn(v)) + }) + } +} + +// Partition divides the elements of the iterator into two separate slices based on a given predicate function. +// +// The function takes a predicate function 'fn', which should return true or false for each element in the iterator. +// Elements for which 'fn' returns true are collected into the left slice, while those for which 'fn' returns false +// are collected into the right slice. +// +// Params: +// +// - fn (func(V) bool): The predicate function used to determine the placement of elements. +// +// Returns: +// +// - (Slice[V], Slice[V]): Two slices representing elements that satisfy and don't satisfy the predicate, respectively. +// +// Example usage: +// +// evens, odds := g.Slice[int]{1, 2, 3, 4, 5}. +// Iter(). +// Partition( +// func(v int) bool { +// return v%2 == 0 +// }) +// +// fmt.Println("Even numbers:", evens) // Output: Even numbers: Slice[2, 4] +// fmt.Println("Odd numbers:", odds) // Output: Odd numbers: Slice[1, 3, 5] +// +// The resulting two slices will contain elements separated based on whether they satisfy the predicate or not. +func (seq SeqSlice[V]) Partition(fn func(v V) bool) (Slice[V], Slice[V]) { + return iter.Partition(iter.Seq[V](seq), fn) +} + +// Permutations generates iterators of all permutations of elements. +// +// The function uses a recursive approach to generate all the permutations of the elements. +// If the iterator is empty or contains a single element, it returns the iterator itself +// wrapped in a single-element iterator. +// +// Returns: +// +// - SeqSlices[V]: An iterator of iterators containing all possible permutations of the +// elements in the iterator. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3} +// perms := slice.Iter().Permutations().Collect() +// for _, perm := range perms { +// fmt.Println(perm) +// } +// +// Output: + +// Slice[1, 2, 3] +// Slice[2, 1, 3] +// Slice[3, 1, 2] +// Slice[1, 3, 2] +// Slice[2, 3, 1] +// Slice[3, 2, 1] +// +// The resulting iterator will contain iterators representing all possible permutations +// of the elements in the original iterator. +func (seq SeqSlice[V]) Permutations() SeqSlices[V] { + return SeqSlices[V](iter.Permutations(iter.Seq[V](seq))) +} + +// Range iterates through elements until the given function returns false. +// +// The function iterates through the elements of the iterator and applies the provided function +// to each element. It stops iteration when the function returns false for an element. +// +// Params: +// +// - fn (func(V) bool): The function that evaluates elements for continuation of iteration. +// +// Example usage: +// +// iter := g.Slice[int]{1, 2, 3, 4, 5}.Iter() +// iter.Range(func(val int) bool { +// fmt.Println(val) // Replace this with the function logic you need. +// return val < 5 // Replace this with the condition for continuing iteration. +// }) +// +// The iteration will stop when the provided function returns false for an element. +func (seq SeqSlice[V]) Range(fn func(v V) bool) { iter.Range(iter.Seq[V](seq), fn) } + +// Skip returns a new iterator skipping the first n elements. +// +// The function creates a new iterator that skips the first n elements of the current iterator +// and returns an iterator starting from the (n+1)th element. +// +// Params: +// +// - n (uint): The number of elements to skip from the beginning of the iterator. +// +// Returns: +// +// - SeqSlice[V]: An iterator that starts after skipping the first n elements. +// +// Example usage: +// +// iter := g.Slice[int]{1, 2, 3, 4, 5, 6}.Iter() +// iter.Skip(3).Collect().Print() +// +// Output: [4, 5, 6] +// +// The resulting iterator will start after skipping the specified number of elements. +func (seq SeqSlice[V]) Skip(n uint) SeqSlice[V] { + return SeqSlice[V](iter.Skip(iter.Seq[V](seq), int(n))) +} + +// StepBy creates a new iterator that iterates over every N-th element of the original iterator. +// This function is useful when you want to skip a specific number of elements between each iteration. +// +// Parameters: +// - n uint: The step size, indicating how many elements to skip between each iteration. +// +// Returns: +// - SeqSlice[V]: A new iterator that produces elements from the original iterator with a step size of N. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5, 6, 7, 8, 9, 10} +// iter := slice.Iter().StepBy(3) +// result := iter.Collect() +// result.Print() +// +// Output: [1 4 7 10] +// +// The resulting iterator will produce elements from the original iterator with a step size of N. +func (seq SeqSlice[V]) StepBy(n uint) SeqSlice[V] { + return SeqSlice[V](iter.StepBy(iter.Seq[V](seq), int(n))) +} + +// SortBy applies a custom sorting function to the elements in the iterator +// and returns a new iterator containing the sorted elements. +// +// The sorting function 'fn' should take two arguments, 'a' and 'b' of type V, +// and return true if 'a' should be ordered before 'b', and false otherwise. +// +// Example: +// +// g.SliceOf("a", "c", "b"). +// Iter(). +// SortBy(func(a, b string) cmp.Ordering { return b.Cmp(a) }). +// Collect(). +// Print() +// +// Output: Slice[c, b, a] +// +// The returned iterator is of type SeqSlice[V], which implements the iterator +// interface for further iteration over the sorted elements. +func (seq SeqSlice[V]) SortBy(fn func(a, b V) cmp.Ordering) SeqSlice[V] { + return SeqSlice[V](iter.SortBy(iter.Seq[V](seq), func(a, b V) bool { return fn(a, b) == cmp.Less })) +} + +// Take returns a new iterator with the first n elements. +// The function creates a new iterator containing the first n elements from the original iterator. +func (seq SeqSlice[V]) Take(n uint) SeqSlice[V] { + return SeqSlice[V](iter.Take(iter.Seq[V](seq), int(n))) +} + +// First returns the first element from the sequence. +func (seq SeqSlice[V]) First() Option[V] { + return OptionOf(iter.First(iter.Seq[V](seq))) +} + +// Last returns the last element from the sequence. +func (seq SeqSlice[V]) Last() Option[V] { + return OptionOf(iter.Last(iter.Seq[V](seq))) +} + +// Nth returns the nth element (0-indexed) in the sequence. +func (seq SeqSlice[V]) Nth(n Int) Option[V] { + return OptionOf(iter.Nth(iter.Seq[V](seq), int(n))) +} + +// ToChan converts the iterator into a channel, optionally with context(s). +// +// The function converts the elements of the iterator into a channel for streaming purposes. +// Optionally, it accepts context(s) to handle cancellation or timeout scenarios. +// +// Params: +// +// - ctxs (context.Context): Optional context(s) to control the channel behavior (e.g., cancellation). +// +// Returns: +// +// - chan V: A channel containing the elements from the iterator. +// +// Example usage: +// +// iter := g.Slice[int]{1, 2, 3}.Iter() +// ctx, cancel := context.WithCancel(context.Background()) +// defer cancel() // Ensure cancellation to avoid goroutine leaks. +// ch := iter.ToChan(ctx) +// for val := range ch { +// fmt.Println(val) +// } +// +// The resulting channel allows streaming elements from the iterator with optional context handling. +func (seq SeqSlice[V]) ToChan(ctxs ...context.Context) chan V { + ctx := context.Background() + if len(ctxs) > 0 { + ctx = ctxs[0] + } + + return iter.ToChan(iter.Seq[V](seq), ctx) +} + +// Unique returns an iterator with only unique elements. +// +// The function returns an iterator containing only the unique elements from the original iterator. +// +// Returns: +// +// - SeqSlice[V]: An iterator containing unique elements from the original iterator. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 2, 4, 5, 3} +// unique := slice.Iter().Unique().Collect() +// unique.Print() +// +// Output: [1, 2, 3, 4, 5]. +// +// The resulting iterator will contain only unique elements from the original iterator. +func (seq SeqSlice[V]) Unique() SeqSlice[V] { + return SeqSlice[V](iter.Unique(iter.Seq[V](seq))) +} + +// Zip combines elements from the current sequence and another sequence into pairs, +// creating an ordered map with identical keys and values of type V. +func (seq SeqSlice[V]) Zip(two SeqSlice[V]) SeqMapOrd[any, any] { + return func(yield func(any, any) bool) { + zipSeq := iter.Zip(iter.Seq[V](seq), iter.Seq[V](two)) + zipSeq(func(a, b V) bool { + return yield(a, b) + }) + } +} + +// Scan accumulates values of the iterator using a function, yielding all intermediate states. +// +// The function takes an initial accumulator value and a function that combines the accumulator +// with each element. It yields the initial value followed by each accumulated state. +// +// Params: +// +// - init (V): The initial accumulator value. +// - fn (func(acc V, val V) V): The function that combines the accumulator with each element. +// +// Returns: +// +// - SeqSlice[V]: A sequence of all intermediate accumulator states. +// +// Example usage: +// +// numbers := g.Slice[int]{1, 2, 3, 4}.Iter() +// sums := numbers.Scan(0, func(acc, val int) int { +// return acc + val +// }) +// // sums will yield: 0, 1, 3, 6, 10 +// +// words := g.Slice[string]{"a", "b", "c"}.Iter() +// concatenated := words.Scan("", func(acc, val string) string { +// return acc + val +// }) +// // concatenated will yield: "", "a", "ab", "abc" +func (seq SeqSlice[V]) Scan(init V, fn func(acc, val V) V) SeqSlice[V] { + return func(yield func(V) bool) { + if !yield(init) { + return + } + iter.Scan(iter.Seq[V](seq), init, fn)(yield) + } +} + +// Find searches for an element in the iterator that satisfies the provided function. +// +// The function iterates through the elements of the iterator and returns the first element +// for which the provided function returns true. +// +// Params: +// +// - fn (func(V) bool): The function used to test elements for a condition. +// +// Returns: +// +// - Option[V]: An Option containing the first element that satisfies the condition; None if not found. +// +// Example usage: +// +// iter := g.Slice[int]{1, 2, 3, 4, 5}.Iter() +// +// found := iter.Find( +// func(i int) bool { +// return i == 2 +// }) +// +// if found.IsSome() { +// fmt.Println("Found:", found.Some()) +// } else { +// fmt.Println("Not found.") +// } +// +// The resulting Option may contain the first element that satisfies the condition, or None if not found. +func (seq SeqSlice[V]) Find(fn func(v V) bool) Option[V] { + return OptionOf(iter.Find(iter.Seq[V](seq), fn)) +} + +// Windows returns an iterator that yields sliding windows of elements of the specified size. +// +// The function creates a new iterator that yields windows of elements from the original iterator, +// where each window is a slice containing elements of the specified size and moves one element at a time. +// +// Params: +// +// - n (int): The size of each window. +// +// Returns: +// +// - SeqSlices[V]: An iterator yielding sliding windows of elements of the specified size. +// +// Example usage: +// +// slice := g.Slice[int]{1, 2, 3, 4, 5, 6} +// windows := slice.Iter().Windows(3).Collect() +// +// Output: [Slice[1, 2, 3] Slice[2, 3, 4] Slice[3, 4, 5] Slice[4, 5, 6]] +// +// The resulting iterator will yield sliding windows of elements, each containing the specified number of elements. +func (seq SeqSlice[V]) Windows(n Int) SeqSlices[V] { + return SeqSlices[V](iter.Windows(iter.Seq[V](seq), int(n))) +} + +// Context allows the iteration to be controlled with a context.Context. +func (seq SeqSlice[V]) Context(ctx context.Context) SeqSlice[V] { + return SeqSlice[V](iter.Context(iter.Seq[V](seq), ctx)) +} + +// MaxBy returns the maximum element in the sequence using the provided comparison function. +func (seq SeqSlice[V]) MaxBy(fn func(V, V) cmp.Ordering) Option[V] { + return OptionOf(iter.MaxBy(iter.Seq[V](seq), func(a, b V) bool { return fn(a, b) == cmp.Less })) +} + +// Min returns the minimum element in the sequence using the provided comparison function. +func (seq SeqSlice[V]) MinBy(fn func(V, V) cmp.Ordering) Option[V] { + return OptionOf(iter.MinBy(iter.Seq[V](seq), func(a, b V) bool { return fn(a, b) == cmp.Less })) +} + +// Next extracts the next element from the iterator and advances it. +// +// This method consumes the next element from the iterator and returns it wrapped in an Option. +// The iterator itself is modified to point to the remaining elements. +// This is similar to calling Pull() but more convenient for single-element extraction. +// +// Returns: +// - Option[V]: Some(value) if an element exists, None if the iterator is exhausted. +func (seq *SeqSlice[V]) Next() Option[V] { + if value, remaining, ok := iter.Next(iter.Seq[V](*seq)); ok { + *seq = SeqSlice[V](remaining) + return Some(value) + } + + return None[V]() +} + +// FromChan converts a channel into an iterator. +// +// This function takes a channel as input and converts its elements into an iterator, +// allowing seamless integration of channels into iterator-based processing pipelines. +// It continuously reads from the channel until it's closed, +// yielding each element to the provided yield function. +// +// Parameters: +// - ch (<-chan V): The input channel to convert into an iterator. +// +// Returns: +// - SeqSlice[V]: An iterator that yields elements from the channel. +// +// Example usage: +// +// ch := make(chan int) +// go func() { +// defer close(ch) +// for i := 1; i <= 5; i++ { +// ch <- i +// } +// }() +// +// // Convert the channel into an iterator and apply filtering and mapping operations. +// g.FromChan(ch). +// Filter(func(i int) bool { return i%2 == 0 }). // Filter even numbers. +// Map(func(i int) int { return i * 2 }). // Double each element. +// Collect(). // Collect the results into a slice. +// Print() // Print the collected results. +// +// Output: Slice[4, 8] +// +// The resulting iterator will yield elements from the provided channel, filtering out odd numbers, +// doubling each even number, and finally collecting the results into a slice. +func FromChan[V any](ch <-chan V) SeqSlice[V] { + return SeqSlice[V](iter.FromChan(ch)) +} diff --git a/backend/vendor/github.com/enetx/g/slice_iter_par.go b/backend/vendor/github.com/enetx/g/slice_iter_par.go new file mode 100644 index 0000000..07211bb --- /dev/null +++ b/backend/vendor/github.com/enetx/g/slice_iter_par.go @@ -0,0 +1,713 @@ +package g + +import ( + "reflect" + "sync" + "sync/atomic" + + "github.com/enetx/g/cmp" +) + +// All returns true only if fn returns true for every element. +// It stops early on the first false. +func (p SeqSlicePar[V]) All(fn func(V) bool) bool { + var ok atomic.Bool + ok.Store(true) + + p.Range(func(v V) bool { + if !fn(v) { + ok.Store(false) + return false + } + return true + }) + + return ok.Load() +} + +// Any returns true if fn returns true for any element. +// It stops early on the first true. +func (p SeqSlicePar[V]) Any(fn func(V) bool) bool { + var ok atomic.Bool + + p.Range(func(v V) bool { + if fn(v) { + ok.Store(true) + return false + } + return true + }) + + return ok.Load() +} + +// Chain concatenates this SeqSlicePar with others, preserving full parallelism. +// Each sequence runs with its own worker pool in parallel. +func (p SeqSlicePar[V]) Chain(others ...SeqSlicePar[V]) SeqSlicePar[V] { + return SeqSlicePar[V]{ + seq: func(yield func(V) bool) { + done := make(chan struct{}) + result := make(chan V, 100) + + var ( + wg sync.WaitGroup + once sync.Once + ) + + runSequence := func(seq SeqSlicePar[V]) { + defer wg.Done() + seq.Range(func(v V) bool { + select { + case <-done: + return false + case result <- v: + return true + } + }) + } + + go func() { + defer close(result) + + wg.Add(1) + go runSequence(p) + + for _, o := range others { + wg.Add(1) + go runSequence(o) + } + + wg.Wait() + }() + + for { + select { + case <-done: + return + case v, ok := <-result: + if !ok { + return + } + if !yield(v) { + once.Do(func() { close(done) }) + return + } + } + } + }, + workers: p.workers, + process: func(v V) (V, bool) { return v, true }, + } +} + +// Collect gathers all processed elements into a Slice. +func (p SeqSlicePar[V]) Collect() Slice[V] { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- v + return true + }) + }() + + var result []V + for v := range ch { + result = append(result, v) + } + + return result +} + +// Count returns the total number of elements processed. +func (p SeqSlicePar[V]) Count() Int { + var count atomic.Int64 + p.Range(func(V) bool { + count.Add(1) + return true + }) + + return Int(count.Load()) +} + +// Exclude removes elements for which fn returns true, in parallel. +func (p SeqSlicePar[V]) Exclude(fn func(V) bool) SeqSlicePar[V] { + return p.Filter(func(v V) bool { return !fn(v) }) +} + +// Filter retains only elements where fn returns true. +func (p SeqSlicePar[V]) Filter(fn func(V) bool) SeqSlicePar[V] { + prev := p.process + + return SeqSlicePar[V]{ + seq: p.seq, + workers: p.workers, + process: func(v V) (V, bool) { + if mid, ok := prev(v); ok && fn(mid) { + return mid, true + } + var zero V + return zero, false + }, + } +} + +// Find returns the first element satisfying fn, or None if no such element exists. +func (p SeqSlicePar[V]) Find(fn func(V) bool) Option[V] { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + if fn(v) { + ch <- v + return false + } + return true + }) + }() + + if v, ok := <-ch; ok { + return Some(v) + } + + return None[V]() +} + +// Fold reduces all elements into a single value, using fn to accumulate results. +func (p SeqSlicePar[V]) Fold(init V, fn func(acc, v V) V) V { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- v + return true + }) + }() + + acc := init + for v := range ch { + acc = fn(acc, v) + } + + return acc +} + +// Reduce aggregates elements of the parallel sequence using the provided function. +// The first received element is used as the initial accumulator. +// If the sequence is empty, returns None[V]. +func (p SeqSlicePar[V]) Reduce(fn func(a, b V) V) Option[V] { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- v + return true + }) + }() + + var ( + acc V + first = true + ) + + for v := range ch { + if first { + acc = v + first = false + continue + } + + acc = fn(acc, v) + } + + if first { + return None[V]() + } + + return Some(acc) +} + +// ForEach applies fn to each element without early exit. +func (p SeqSlicePar[V]) ForEach(fn func(V)) { + p.Range(func(v V) bool { + fn(v) + return true + }) +} + +// Inspect invokes fn on each element without altering the resulting sequence. +func (p SeqSlicePar[V]) Inspect(fn func(V)) SeqSlicePar[V] { + prev := p.process + + return SeqSlicePar[V]{ + seq: p.seq, + workers: p.workers, + process: func(x V) (V, bool) { + if mid, ok := prev(x); ok { + fn(mid) + return mid, true + } + var zero V + return zero, false + }, + } +} + +// Map applies fn to each element. +func (p SeqSlicePar[V]) Map(fn func(V) V) SeqSlicePar[V] { + prev := p.process + + return SeqSlicePar[V]{ + seq: p.seq, + workers: p.workers, + process: func(v V) (V, bool) { + if mid, ok := prev(v); ok { + return fn(mid), true + } + var zero V + return zero, false + }, + } +} + +func (p SeqSlicePar[V]) Partition(fn func(V) bool) (Slice[V], Slice[V]) { + type item struct { + value V + isLeft bool + } + + ch := make(chan item) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- item{ + value: v, + isLeft: fn(v), + } + return true + }) + }() + + var left, right Slice[V] + for it := range ch { + if it.isLeft { + left.Push(it.value) + } else { + right.Push(it.value) + } + } + + return left, right +} + +// Range applies fn to each processed element in parallel, stopping on false. +func (p SeqSlicePar[V]) Range(fn func(V) bool) { + in := make(chan V) + done := make(chan struct{}) + + var ( + wg sync.WaitGroup + once sync.Once + ) + + go func() { + defer close(in) + p.seq(func(v V) bool { + select { + case <-done: + return false + case in <- v: + return true + } + }) + }() + + wg.Add(int(p.workers)) + for range p.workers { + go func() { + defer wg.Done() + for v := range in { + if mid, ok := p.process(v); ok { + if !fn(mid) { + once.Do(func() { close(done) }) + return + } + } + } + }() + } + + wg.Wait() +} + +func (p SeqSlicePar[V]) Skip(n Int) SeqSlicePar[V] { + prev := p.process + + return SeqSlicePar[V]{ + seq: func(yield func(V) bool) { + var cnt int64 + p.seq(func(v V) bool { + if atomic.AddInt64(&cnt, 1) > int64(n) { + return yield(v) + } + return true + }) + }, + workers: p.workers, + process: prev, + } +} + +func (p SeqSlicePar[V]) Take(n Int) SeqSlicePar[V] { + prev := p.process + + return SeqSlicePar[V]{ + seq: func(yield func(V) bool) { + var cnt int64 + p.seq(func(v V) bool { + if atomic.AddInt64(&cnt, 1) <= int64(n) { + return yield(v) + } + return false + }) + }, + workers: p.workers, + process: prev, + } +} + +// Unique removes duplicate elements, preserving the first occurrence. +func (p SeqSlicePar[V]) Unique() SeqSlicePar[V] { + prev := p.process + seen := NewMapSafe[any, struct{}]() + + return SeqSlicePar[V]{ + seq: p.seq, + workers: p.workers, + process: func(v V) (V, bool) { + if mid, ok := prev(v); ok { + if loaded := seen.Entry(mid).OrSet(struct{}{}); loaded.IsSome() { + var zero V + return zero, false + } + + return mid, true + } + + var zero V + return zero, false + }, + } +} + +// Flatten unpacks nested slices or arrays in the source, returning a flat parallel sequence. +func (p SeqSlicePar[V]) Flatten() SeqSlicePar[V] { + seq := func(yield func(V) bool) { + var recurse func(any) bool + + recurse = func(item any) bool { + if item == nil { + return true + } + + rv := reflect.ValueOf(item) + + if !rv.IsValid() { + return true + } + + switch rv.Kind() { + case reflect.Slice, reflect.Array: + if rv.IsNil() { + return true + } + + for i := range rv.Len() { + elem := rv.Index(i) + + if !elem.CanInterface() { + continue + } + + if !recurse(elem.Interface()) { + return false + } + } + default: + if v, ok := item.(V); ok { + if !yield(v) { + return false + } + } + } + return true + } + + resultsChan := make(chan V, 100) + doneChan := make(chan struct{}) + var once sync.Once + + go func() { + defer close(resultsChan) + + p.Range(func(v V) bool { + select { + case <-doneChan: + return false + default: + } + + flattenedItems := flattenToSlice(v) + for _, item := range flattenedItems { + if flatItem, ok := item.(V); ok { + select { + case resultsChan <- flatItem: + case <-doneChan: + return false + } + } + } + return true + }) + }() + + for { + select { + case v, ok := <-resultsChan: + if !ok { + return + } + if !yield(v) { + once.Do(func() { close(doneChan) }) + return + } + case <-doneChan: + return + } + } + } + + return SeqSlicePar[V]{ + seq: seq, + workers: p.workers, + process: func(v V) (V, bool) { return v, true }, + } +} + +// Helper function to flatten an item into a slice +func flattenToSlice(item any) []any { + if item == nil { + return nil + } + + rv := reflect.ValueOf(item) + if !rv.IsValid() { + return nil + } + + var result []any + + var recurse func(any) + recurse = func(item any) { + if item == nil { + return + } + + rv := reflect.ValueOf(item) + if !rv.IsValid() { + return + } + + switch rv.Kind() { + case reflect.Slice, reflect.Array: + if rv.IsNil() { + return + } + + for i := range rv.Len() { + elem := rv.Index(i) + if elem.CanInterface() { + recurse(elem.Interface()) + } + } + default: + result = append(result, item) + } + } + + recurse(item) + + return result +} + +// FlatMap applies fn to each element in parallel, flattening the resulting sequences. +func (p SeqSlicePar[V]) FlatMap(fn func(V) SeqSlice[V]) SeqSlicePar[V] { + return SeqSlicePar[V]{ + seq: func(yield func(V) bool) { + done := make(chan struct{}) + result := make(chan V, 100) + + var ( + wg sync.WaitGroup + once sync.Once + ) + + go func() { + defer close(result) + + p.Range(func(v V) bool { + select { + case <-done: + return false + default: + } + + wg.Add(1) + go func(val V) { + defer wg.Done() + fn(val)(func(item V) bool { + select { + case <-done: + return false + case result <- item: + return true + } + }) + }(v) + + return true + }) + + wg.Wait() + }() + + for { + select { + case <-done: + return + case v, ok := <-result: + if !ok { + return + } + if !yield(v) { + once.Do(func() { close(done) }) + return + } + } + } + }, + workers: p.workers, + process: func(v V) (V, bool) { return v, true }, + } +} + +// FilterMap applies fn to each element in parallel, keeping only Some values. +func (p SeqSlicePar[V]) FilterMap(fn func(V) Option[V]) SeqSlicePar[V] { + prev := p.process + + return SeqSlicePar[V]{ + seq: p.seq, + workers: p.workers, + process: func(v V) (V, bool) { + if mid, ok := prev(v); ok { + if opt := fn(mid); opt.IsSome() { + return opt.Some(), true + } + } + var zero V + return zero, false + }, + } +} + +// StepBy yields every nth element. +func (p SeqSlicePar[V]) StepBy(n uint) SeqSlicePar[V] { + if n == 0 { + n = 1 + } + + prev := p.process + counter := &atomic.Uint64{} + + return SeqSlicePar[V]{ + seq: p.seq, + workers: p.workers, + process: func(v V) (V, bool) { + if mid, ok := prev(v); ok { + count := counter.Add(1) + if (count-1)%uint64(n) == 0 { + return mid, true + } + } + var zero V + return zero, false + }, + } +} + +// MaxBy returns the maximum element according to the comparison function. +func (p SeqSlicePar[V]) MaxBy(fn func(V, V) cmp.Ordering) Option[V] { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- v + return true + }) + }() + + var max V + hasMax := false + + for v := range ch { + if !hasMax { + max = v + hasMax = true + } else if fn(v, max).IsGt() { + max = v + } + } + + if hasMax { + return Some(max) + } + + return None[V]() +} + +// MinBy returns the minimum element according to the comparison function. +func (p SeqSlicePar[V]) MinBy(fn func(V, V) cmp.Ordering) Option[V] { + ch := make(chan V) + + go func() { + defer close(ch) + p.Range(func(v V) bool { + ch <- v + return true + }) + }() + + var min V + hasMin := false + + for v := range ch { + if !hasMin { + min = v + hasMin = true + } else if fn(v, min).IsLt() { + min = v + } + } + + if hasMin { + return Some(min) + } + + return None[V]() +} diff --git a/backend/vendor/github.com/enetx/g/string.go b/backend/vendor/github.com/enetx/g/string.go new file mode 100644 index 0000000..fb08f17 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/string.go @@ -0,0 +1,821 @@ +package g + +import ( + "fmt" + "math/big" + "slices" + "strconv" + "strings" + "unicode" + "unicode/utf8" + "unsafe" + + "github.com/enetx/g/cmp" + "github.com/enetx/g/f" + "golang.org/x/text/unicode/norm" +) + +// NewString creates a new String from the provided string. +func NewString[T ~string | rune | byte | ~[]rune | ~[]byte](str T) String { return String(str) } + +// Clone returns a copy of the String. +// It ensures that the returned String does not share underlying memory with the original String, +// making it safe to modify or store independently. +func (s String) Clone() String { return String(strings.Clone(s.Std())) } + +// Transform applies a transformation function to the String and returns the result. +func (s String) Transform(fn func(String) String) String { return fn(s) } + +// Builder returns a new Builder initialized with the content of the String. +func (s String) Builder() *Builder { + b := new(Builder) + b.WriteString(s) + return b +} + +// Min returns the minimum of Strings. +func (s String) Min(b ...String) String { return cmp.Min(append(b, s)...) } + +// Max returns the maximum of Strings. +func (s String) Max(b ...String) String { return cmp.Max(append(b, s)...) } + +// Random generates a random String of the specified length, selecting characters from predefined sets. +// If additional character sets are provided, only those will be used; the default set (ASCII_LETTERS and DIGITS) +// is excluded unless explicitly provided. +// +// Parameters: +// - count (Int): Length of the random String to generate. +// - letters (...String): Additional character sets to consider for generating the random String (optional). +// +// Returns: +// - String: Randomly generated String with the specified length. +// +// Example usage: +// +// randomString := g.String.Random(10) +// randomString contains a random String with 10 characters. +func (String) Random(length Int, letters ...String) String { + var chars Slice[rune] + + if len(letters) != 0 { + chars = letters[0].Runes() + } else { + chars = (ASCII_LETTERS + DIGITS).Runes() + } + + var b Builder + b.Grow(length) + + for range length { + b.WriteRune(chars.Random()) + } + + return b.String() +} + +// IsASCII checks if all characters in the String are ASCII bytes. +func (s String) IsASCII() bool { + for _, r := range s { + if r > unicode.MaxASCII { + return false + } + } + + return true +} + +// IsDigit checks if all characters in the String are digits. +func (s String) IsDigit() bool { + if s.Empty() { + return false + } + + for _, c := range s { + if !unicode.IsDigit(c) { + return false + } + } + + return true +} + +// ToInt tries to parse the String as an int and returns an Int. +func (s String) ToInt() Result[Int] { + hint, err := strconv.ParseInt(s.Std(), 0, 64) + if err != nil { + return Err[Int](err) + } + + return Ok(Int(hint)) +} + +// ToBigInt attempts to convert the String receiver into an Option containing a *big.Int. +// This function assumes the string represents a numerical value, which can be in decimal, +// hexadecimal (prefixed with "0x"), or octal (prefixed with "0") format. The function +// leverages the SetString method of the math/big package, automatically detecting the +// numeric base when set to 0. +// +// If the string is correctly formatted and represents a valid number, ToBigInt returns +// a Some containing the *big.Int parsed from the string. If the string is empty, contains +// invalid characters, or does not conform to a recognizable numeric format, ToBigInt +// returns a None, indicating that the conversion was unsuccessful. +// +// Returns: +// - An Option[*big.Int] encapsulating the conversion result. It returns Some[*big.Int] +// with the parsed value if successful, otherwise None[*big.Int] if the parsing fails. +func (s String) ToBigInt() Option[*big.Int] { + if bigInt, ok := new(big.Int).SetString(s.Std(), 0); ok { + return Some(bigInt) + } + + return None[*big.Int]() +} + +// ToFloat tries to parse the String as a float64 and returns an Float. +func (s String) ToFloat() Result[Float] { + float, err := strconv.ParseFloat(s.Std(), 64) + if err != nil { + return Err[Float](err) + } + + return Ok(Float(float)) +} + +// Title converts the String to title case. +func (s String) Title() String { return String(title.String(s.Std())) } + +// Lower returns the String in lowercase. +func (s String) Lower() String { return s.Bytes().Lower().String() } + +// Upper returns the String in uppercase. +func (s String) Upper() String { return s.Bytes().Upper().String() } + +// Trim removes leading and trailing white space from the String. +func (s String) Trim() String { return String(strings.TrimSpace(s.Std())) } + +// TrimStart removes leading white space from the String. +func (s String) TrimStart() String { return String(strings.TrimLeftFunc(s.Std(), unicode.IsSpace)) } + +// TrimEnd removes trailing white space from the String. +func (s String) TrimEnd() String { return String(strings.TrimRightFunc(s.Std(), unicode.IsSpace)) } + +// TrimSet removes the specified set of characters from both the beginning and end of the String. +func (s String) TrimSet(cutset String) String { return String(strings.Trim(s.Std(), cutset.Std())) } + +// TrimStartSet removes the specified set of characters from the beginning of the String. +func (s String) TrimStartSet(cutset String) String { + return String(strings.TrimLeft(s.Std(), cutset.Std())) +} + +// TrimEndSet removes the specified set of characters from the end of the String. +func (s String) TrimEndSet(cutset String) String { + return String(strings.TrimRight(s.Std(), cutset.Std())) +} + +// StripPrefix trims the specified prefix from the String. +func (s String) StripPrefix(prefix String) String { + return String(strings.TrimPrefix(s.Std(), prefix.Std())) +} + +// StripSuffix trims the specified suffix from the String. +func (s String) StripSuffix(suffix String) String { + return String(strings.TrimSuffix(s.Std(), suffix.Std())) +} + +// Replace replaces the 'oldS' String with the 'newS' String for the specified number of +// occurrences. +func (s String) Replace(oldS, newS String, n Int) String { + return String(strings.Replace(s.Std(), oldS.Std(), newS.Std(), n.Std())) +} + +// ReplaceAll replaces all occurrences of the 'oldS' String with the 'newS' String. +func (s String) ReplaceAll(oldS, newS String) String { + return String(strings.ReplaceAll(s.Std(), oldS.Std(), newS.Std())) +} + +// ReplaceMulti creates a custom replacer to perform multiple string replacements. +// +// Parameters: +// +// - oldnew ...String: Pairs of strings to be replaced. Specify as many pairs as needed. +// +// Returns: +// +// - String: A new string with replacements applied using the custom replacer. +// +// Example usage: +// +// original := g.String("Hello, world! This is a test.") +// replaced := original.ReplaceMulti( +// "Hello", "Greetings", +// "world", "universe", +// "test", "example", +// ) +// // replaced contains "Greetings, universe! This is an example." +func (s String) ReplaceMulti(oldnew ...String) String { + pairs := make([]string, len(oldnew)) + for i, str := range oldnew { + pairs[i] = str.Std() + } + + return String(strings.NewReplacer(pairs...).Replace(s.Std())) +} + +// Remove removes all occurrences of specified substrings from the String. +// +// Parameters: +// +// - matches ...String: Substrings to be removed from the string. Specify as many substrings as needed. +// +// Returns: +// +// - String: A new string with all specified substrings removed. +// +// Example usage: +// +// original := g.String("Hello, world! This is a test.") +// modified := original.Remove( +// "Hello", +// "test", +// ) +// // modified contains ", world! This is a ." +func (s String) Remove(matches ...String) String { + if len(matches) == 0 { + return s + } + + pairs := make([]string, len(matches)*2) + for i, match := range matches { + pairs[i*2] = match.Std() + pairs[i*2+1] = "" + } + + return String(strings.NewReplacer(pairs...).Replace(s.Std())) +} + +// ReplaceNth returns a new String instance with the nth occurrence of oldS +// replaced with newS. If there aren't enough occurrences of oldS, the +// original String is returned. If n is less than -1, the original String +// is also returned. If n is -1, the last occurrence of oldS is replaced with newS. +// +// Returns: +// +// - A new String instance with the nth occurrence of oldS replaced with newS. +// +// Example usage: +// +// s := g.String("The quick brown dog jumped over the lazy dog.") +// result := s.ReplaceNth("dog", "fox", 2) +// fmt.Println(result) +// +// Output: "The quick brown dog jumped over the lazy fox.". +func (s String) ReplaceNth(oldS, newS String, n Int) String { + if n < -1 || len(oldS) == 0 { + return s + } + + count, i := Int(0), Int(0) + + for { + pos := s[i:].Index(oldS) + if pos == -1 { + break + } + + pos += i + count++ + + if count == n || (n == -1 && s[pos+oldS.Len():].Index(oldS) == -1) { + return s[:pos] + newS + s[pos+oldS.Len():] + } + + i = pos + oldS.Len() + } + + return s +} + +// Contains checks if the String contains the specified substring. +func (s String) Contains(substr String) bool { return f.Contains(substr)(s) } + +// ContainsAny checks if the String contains any of the specified substrings. +func (s String) ContainsAny(substrs ...String) bool { + return slices.ContainsFunc(substrs, s.Contains) +} + +// ContainsAll checks if the given String contains all the specified substrings. +func (s String) ContainsAll(substrs ...String) bool { + for _, substr := range substrs { + if !s.Contains(substr) { + return false + } + } + + return true +} + +// ContainsAnyChars checks if the String contains any characters from the specified String. +func (s String) ContainsAnyChars(chars String) bool { return f.ContainsAnyChars(chars)(s) } + +// StartsWith checks if the String starts with the specified prefix. +// It uses a higher-order function to perform the check. +func (s String) StartsWith(prefix String) bool { return f.StartsWith(prefix)(s) } + +// StartsWithAny checks if the String starts with any of the provided prefixes. +// The method accepts a variable number of arguments, allowing for checking against multiple +// prefixes at once. It iterates over the provided prefixes and uses the HasPrefix function from +// the strings package to check if the String starts with each prefix. +// The function returns true if the String starts with any of the prefixes, and false otherwise. +// +// Example usage: +// +// s := g.String("http://example.com") +// if s.StartsWithAny("http://", "https://") { +// // do something +// } +func (s String) StartsWithAny(prefixes ...String) bool { + return slices.ContainsFunc(prefixes, s.StartsWith) +} + +// EndsWith checks if the String ends with the specified suffix. +// It uses a higher-order function to perform the check. +func (s String) EndsWith(suffix String) bool { return f.EndsWith(suffix)(s) } + +// EndsWithAny checks if the String ends with any of the provided suffixes. +// The method accepts a variable number of arguments, allowing for checking against multiple +// suffixes at once. It iterates over the provided suffixes and uses the HasSuffix function from +// the strings package to check if the String ends with each suffix. +// The function returns true if the String ends with any of the suffixes, and false otherwise. +// +// Example usage: +// +// s := g.String("example.com") +// if s.EndsWithAny(".com", ".net") { +// // do something +// } +func (s String) EndsWithAny(suffixes ...String) bool { + return slices.ContainsFunc(suffixes, s.EndsWith) +} + +// Lines splits the String by lines and returns the iterator. +func (s String) Lines() SeqSlice[String] { + return transformSeq(strings.Lines(s.Std()), NewString).Map(String.TrimEnd) +} + +// Fields splits the String into a slice of substrings, removing any whitespace, and returns the iterator. +func (s String) Fields() SeqSlice[String] { + return transformSeq(strings.FieldsSeq(s.Std()), NewString) +} + +// FieldsBy splits the String into a slice of substrings using a custom function to determine the field boundaries, +// and returns the iterator. +func (s String) FieldsBy(fn func(r rune) bool) SeqSlice[String] { + return transformSeq(strings.FieldsFuncSeq(s.Std(), fn), NewString) +} + +// Split splits the String by the specified separator and returns the iterator. +func (s String) Split(sep ...String) SeqSlice[String] { + var separator String + if len(sep) != 0 { + separator = sep[0] + } + + return transformSeq(strings.SplitSeq(s.Std(), separator.Std()), NewString) +} + +// SplitAfter splits the String after each instance of the specified separator and returns the iterator. +func (s String) SplitAfter(sep String) SeqSlice[String] { + return transformSeq(strings.SplitAfterSeq(s.Std(), sep.Std()), NewString) +} + +// SplitN splits the String into substrings using the provided separator and returns an Slice[String] of the results. +// The n parameter controls the number of substrings to return: +// - If n is negative, there is no limit on the number of substrings returned. +// - If n is zero, an empty Slice[String] is returned. +// - If n is positive, at most n substrings are returned. +func (s String) SplitN(sep String, n Int) Slice[String] { + return TransformSlice(strings.SplitN(s.Std(), sep.Std(), n.Std()), NewString) +} + +// Chunks splits the String into chunks of the specified size. +// +// This function iterates through the String, creating new String chunks of the specified size. +// If size is less than or equal to 0 or the String is empty, +// it returns an empty Slice[String]. +// If size is greater than or equal to the length of the String, +// it returns an Slice[String] containing the original String. +// +// Parameters: +// +// - size (Int): The size of the chunks to split the String into. +// +// Returns: +// +// - Slice[String]: A slice of String chunks of the specified size. +// +// Example usage: +// +// text := g.String("Hello, World!") +// chunks := text.Chunks(4) +// +// chunks contains {"Hell", "o, W", "orld", "!"}. +func (s String) Chunks(size Int) SeqSlice[String] { + if size.Lte(0) || s.Empty() { + return func(func(String) bool) {} + } + + runes := s.Runes() + if size.Gte(Int(len(runes))) { + return func(yield func(String) bool) { yield(s) } + } + + n := size.Std() + return func(yield func(String) bool) { + for i := 0; i < len(runes); i += n { + end := min(i+n, len(runes)) + if !yield(String(runes[i:end])) { + return + } + } + } +} + +// Cut returns two String values. The first String contains the remainder of the +// original String after the cut. The second String contains the text between the +// first occurrences of the 'start' and 'end' strings, with tags removed if specified. +// +// The function searches for the 'start' and 'end' strings within the String. +// If both are found, it returns the first String containing the remainder of the +// original String after the cut, followed by the second String containing the text +// between the first occurrences of 'start' and 'end' with tags removed if specified. +// +// If either 'start' or 'end' is empty or not found in the String, it returns the +// original String as the second String, and an empty String as the first. +// +// Parameters: +// +// - start (String): The String marking the beginning of the text to be cut. +// +// - end (String): The String marking the end of the text to be cut. +// +// - rmtags (bool, optional): An optional boolean parameter indicating whether +// to remove 'start' and 'end' tags from the cut text. Defaults to false. +// +// Returns: +// +// - String: The first String containing the remainder of the original String +// after the cut, with tags removed if specified, +// or an empty String if 'start' or 'end' is empty or not found. +// +// - String: The second String containing the text between the first occurrences of +// 'start' and 'end', or the original String if 'start' or 'end' is empty or not found. +// +// Example usage: +// +// s := g.String("Hello, [world]! How are you?") +// remainder, cut := s.Cut("[", "]") +// // remainder: "Hello, ! How are you?" +// // cut: "world" +func (s String) Cut(start, end String, rmtags ...bool) (String, String) { + if start.Empty() || end.Empty() { + return s, "" + } + + startIndex := s.Index(start) + if startIndex == -1 { + return s, "" + } + + startEnd := startIndex + start.Len() + endIndex := s[startEnd:].Index(end) + if endIndex == -1 { + return s, "" + } + + cut := s[startEnd : startEnd+endIndex] + + if len(rmtags) != 0 && !rmtags[0] { + startEnd += end.Len() + return s[:startIndex] + s[startIndex:startEnd+endIndex] + s[startEnd+endIndex:], cut + } + + return s[:startIndex] + s[startEnd+endIndex+end.Len():], cut +} + +// Similarity calculates the similarity between two Strings using the +// Levenshtein distance algorithm and returns the similarity percentage as an Float. +// +// The function compares two Strings using the Levenshtein distance, +// which measures the difference between two sequences by counting the number +// of single-character edits required to change one sequence into the other. +// The similarity is then calculated by normalizing the distance by the maximum +// length of the two input Strings. +// +// Parameters: +// +// - str (String): The String to compare with s. +// +// Returns: +// +// - Float: The similarity percentage between the two Strings as a value between 0 and 100. +// +// Example usage: +// +// s1 := g.String("kitten") +// s2 := g.String("sitting") +// similarity := s1.Similarity(s2) // 57.14285714285714 +func (s String) Similarity(str String) Float { + if s.Eq(str) { + return 100 + } + + if s.Empty() || str.Empty() { + return 0 + } + + s1 := s.Runes() + s2 := str.Runes() + + lenS1 := s.LenRunes() + lenS2 := str.LenRunes() + + if lenS1 > lenS2 { + s1, s2, lenS1, lenS2 = s2, s1, lenS2, lenS1 + } + + distance := NewSlice[Int](lenS1 + 1) + + for i, r2 := range s2 { + prev := Int(i) + 1 + + for j, r1 := range s1 { + current := distance[j] + if r2 != r1 { + current = distance[j].Add(1).Min(prev + 1).Min(distance[j+1] + 1) + } + + distance[j], prev = prev, current + } + + distance[lenS1] = prev + } + + return Float(1).Sub(distance[lenS1].Float() / lenS1.Max(lenS2).Float()).Mul(100) +} + +// Cmp compares two Strings and returns an cmp.Ordering indicating their relative order. +// The result will be cmp.Equal if s==str, cmp.Less if s < str, and cmp.Greater if s > str. +func (s String) Cmp(str String) cmp.Ordering { return cmp.Cmp(s, str) } + +// Append appends the specified String to the current String. +func (s String) Append(str String) String { return s + str } + +// Prepend prepends the specified String to the current String. +func (s String) Prepend(str String) String { return str + s } + +// ContainsRune checks if the String contains the specified rune. +func (s String) ContainsRune(r rune) bool { return strings.ContainsRune(s.Std(), r) } + +// Count returns the number of non-overlapping instances of the substring in the String. +func (s String) Count(substr String) Int { return Int(strings.Count(s.Std(), substr.Std())) } + +// Empty checks if the String is empty. +func (s String) Empty() bool { return len(s) == 0 } + +// Eq checks if two Strings are equal. +func (s String) Eq(str String) bool { return s == str } + +// EqFold compares two String strings case-insensitively. +func (s String) EqFold(str String) bool { return strings.EqualFold(s.Std(), str.Std()) } + +// Gt checks if the String is greater than the specified String. +func (s String) Gt(str String) bool { return s > str } + +// Gte checks if the String is greater than or equal to the specified String. +func (s String) Gte(str String) bool { return s >= str } + +// Bytes returns the String as an Bytes. +func (s String) Bytes() Bytes { return Bytes(s) } + +// BytesUnsafe converts the String into Bytes without copying memory. +// Warning: the resulting Bytes shares the same underlying memory as the original String. +// If the original String is modified through unsafe operations (rare), or if it is garbage collected, +// the Bytes may become invalid or cause undefined behavior. +func (s String) BytesUnsafe() Bytes { return unsafe.Slice(unsafe.StringData(s.Std()), len(s)) } + +// Index returns the index of the first instance of the specified substring in the String, or -1 +// if substr is not present in s. +func (s String) Index(substr String) Int { return Int(strings.Index(s.Std(), substr.Std())) } + +// LastIndex returns the index of the last instance of the specified substring in the String, or -1 +// if substr is not present in s. +func (s String) LastIndex(substr String) Int { return Int(strings.LastIndex(s.Std(), substr.Std())) } + +// IndexRune returns the index of the first instance of the specified rune in the String. +func (s String) IndexRune(r rune) Int { return Int(strings.IndexRune(s.Std(), r)) } + +// Len returns the length of the String. +func (s String) Len() Int { return Int(len(s)) } + +// LenRunes returns the number of runes in the String. +func (s String) LenRunes() Int { return Int(utf8.RuneCountInString(s.Std())) } + +// Lt checks if the String is less than the specified String. +func (s String) Lt(str String) bool { return s < str } + +// Lte checks if the String is less than or equal to the specified String. +func (s String) Lte(str String) bool { return s <= str } + +// Map applies the provided function to all runes in the String and returns the resulting String. +func (s String) Map(fn func(rune) rune) String { return String(strings.Map(fn, s.Std())) } + +// NormalizeNFC returns a new String with its Unicode characters normalized using the NFC form. +func (s String) NormalizeNFC() String { return String(norm.NFC.String(s.Std())) } + +// Ne checks if two Strings are not equal. +func (s String) Ne(str String) bool { return !s.Eq(str) } + +// NotEmpty checks if the String is not empty. +func (s String) NotEmpty() bool { return s.Len() != 0 } + +// Reader returns a *strings.Reader initialized with the content of String. +func (s String) Reader() *strings.Reader { return strings.NewReader(s.Std()) } + +// Repeat returns a new String consisting of the specified count of the original String. +func (s String) Repeat(count Int) String { return String(strings.Repeat(s.Std(), count.Std())) } + +// Reverse reverses the String. +func (s String) Reverse() String { return s.Bytes().Reverse().String() } + +// Runes returns the String as a slice of runes. +func (s String) Runes() Slice[rune] { return []rune(s) } + +// Chars splits the String into individual characters and returns the iterator. +func (s String) Chars() SeqSlice[String] { return s.Split() } + +// SubString extracts a substring from the String starting at the 'start' index and ending before the 'end' index. +// The function also supports an optional 'step' parameter to define the increment between indices in the substring. +// If 'start' or 'end' index is negative, they represent positions relative to the end of the String: +// - A negative 'start' index indicates the position from the end of the String, moving backward. +// - A negative 'end' index indicates the position from the end of the String. +// The function ensures that indices are adjusted to fall within the valid range of the String's length. +// If indices are out of bounds or if 'start' exceeds 'end', the function returns the original String unmodified. +func (s String) SubString(start, end Int, step ...Int) String { + return String(s.Runes().SubSlice(start, end, step...)) +} + +// Std returns the String as a string. +func (s String) Std() string { return string(s) } + +// Format applies a specified format to the String object. +func (s String) Format(template String) String { return Format(template, s) } + +// Truncate shortens the String to the specified maximum length. If the String exceeds the +// specified length, it is truncated, and an ellipsis ("...") is appended to indicate the truncation. +// +// If the length of the String is less than or equal to the specified maximum length, the +// original String is returned unchanged. +// +// The method respects Unicode characters and truncates based on the number of runes, +// not bytes. +// +// Parameters: +// - max: The maximum number of runes allowed in the resulting String. +// +// Returns: +// - A new String truncated to the specified maximum length with "..." appended +// if truncation occurs. Otherwise, returns the original String. +// +// Example usage: +// +// s := g.String("Hello, World!") +// result := s.Truncate(5) +// // result: "Hello..." +// +// s2 := g.String("Short") +// result2 := s2.Truncate(10) +// // result2: "Short" +// +// s3 := g.String("😊😊😊😊😊") +// result3 := s3.Truncate(3) +// // result3: "😊😊😊..." +func (s String) Truncate(max Int) String { + if max.IsNegative() || s.LenRunes().Lte(max) { + return s + } + + return String(s.Runes().SubSlice(0, max)).Append("...") +} + +// LeftJustify justifies the String to the left by adding padding to the right, up to the +// specified length. If the length of the String is already greater than or equal to the specified +// length, or the pad is empty, the original String is returned. +// +// The padding String is repeated as necessary to fill the remaining length. +// The padding is added to the right of the String. +// +// Parameters: +// - length: The desired length of the resulting justified String. +// - pad: The String used as padding. +// +// Example usage: +// +// s := g.String("Hello") +// result := s.LeftJustify(10, "...") +// // result: "Hello....." +func (s String) LeftJustify(length Int, pad String) String { + if s.LenRunes() >= length || pad.Eq("") { + return s + } + + var b Builder + + _, _ = b.WriteString(s) + writePadding(&b, pad, pad.LenRunes(), length-s.LenRunes()) + + return b.String() +} + +// RightJustify justifies the String to the right by adding padding to the left, up to the +// specified length. If the length of the String is already greater than or equal to the specified +// length, or the pad is empty, the original String is returned. +// +// The padding String is repeated as necessary to fill the remaining length. +// The padding is added to the left of the String. +// +// Parameters: +// - length: The desired length of the resulting justified String. +// - pad: The String used as padding. +// +// Example usage: +// +// s := g.String("Hello") +// result := s.RightJustify(10, "...") +// // result: ".....Hello" +func (s String) RightJustify(length Int, pad String) String { + if s.LenRunes() >= length || pad.Empty() { + return s + } + + var b Builder + + writePadding(&b, pad, pad.LenRunes(), length-s.LenRunes()) + _, _ = b.WriteString(s) + + return b.String() +} + +// Center justifies the String by adding padding on both sides, up to the specified length. +// If the length of the String is already greater than or equal to the specified length, or the +// pad is empty, the original String is returned. +// +// The padding String is repeated as necessary to evenly distribute the remaining length on both +// sides. +// The padding is added to the left and right of the String. +// +// Parameters: +// - length: The desired length of the resulting justified String. +// - pad: The String used as padding. +// +// Example usage: +// +// s := g.String("Hello") +// result := s.Center(10, "...") +// // result: "..Hello..." +func (s String) Center(length Int, pad String) String { + if s.LenRunes() >= length || pad.Empty() { + return s + } + + var b Builder + + remains := length - s.LenRunes() + + writePadding(&b, pad, pad.LenRunes(), remains/2) + _, _ = b.WriteString(s) + writePadding(&b, pad, pad.LenRunes(), (remains+1)/2) + + return b.String() +} + +// writePadding writes the padding String to the output Builder to fill the remaining length. +// It repeats the padding String as necessary and appends any remaining runes from the padding +// String. +func writePadding(b *Builder, pad String, padlen, remains Int) { + if repeats := remains / padlen; repeats > 0 { + _, _ = b.WriteString(pad.Repeat(repeats)) + } + + padrunes := pad.Runes() + for i := range remains % padlen { + _, _ = b.WriteRune(padrunes[i]) + } +} + +// Print writes the content of the String to the standard output (console) +// and returns the String unchanged. +func (s String) Print() String { fmt.Print(s); return s } + +// Println writes the content of the String to the standard output (console) with a newline +// and returns the String unchanged. +func (s String) Println() String { fmt.Println(s); return s } diff --git a/backend/vendor/github.com/enetx/g/string_builder.go b/backend/vendor/github.com/enetx/g/string_builder.go new file mode 100644 index 0000000..1c307bb --- /dev/null +++ b/backend/vendor/github.com/enetx/g/string_builder.go @@ -0,0 +1,37 @@ +package g + +import "strings" + +// Builder wraps strings.Builder and provides additional type-safe methods +// for use with the custom types String and Int. +type Builder struct{ builder strings.Builder } + +// NewBuilder creates a new instance of Builder. +func NewBuilder() *Builder { return new(Builder) } + +// Write appends the given byte slice to the builder. +func (b *Builder) Write(bs []byte) (int, error) { return b.builder.Write(bs) } + +// WriteString appends the given String to the builder. +func (b *Builder) WriteString(str String) (int, error) { return b.builder.WriteString(str.Std()) } + +// WriteByte appends the given byte to the builder. +func (b *Builder) WriteByte(c byte) error { return b.builder.WriteByte(c) } + +// WriteRune appends the given rune to the builder. +func (b *Builder) WriteRune(r rune) (int, error) { return b.builder.WriteRune(r) } + +// Grow increases the builder’s capacity by at least n bytes. +func (b *Builder) Grow(n Int) { b.builder.Grow(n.Std()) } + +// Cap returns the builder’s current capacity. +func (b *Builder) Cap() Int { return Int(b.builder.Cap()) } + +// Len returns the number of bytes currently in the builder. +func (b *Builder) Len() Int { return Int(b.builder.Len()) } + +// Reset clears the contents of the builder. +func (b *Builder) Reset() { b.builder.Reset() } + +// String returns the accumulated string as a custom String type. +func (b *Builder) String() String { return String(b.builder.String()) } diff --git a/backend/vendor/github.com/enetx/g/string_compdecomp.go b/backend/vendor/github.com/enetx/g/string_compdecomp.go new file mode 100644 index 0000000..3836950 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/string_compdecomp.go @@ -0,0 +1,186 @@ +package g + +import ( + "bytes" + "compress/flate" + "compress/gzip" + "compress/zlib" + "io" + + "github.com/andybalholm/brotli" + "github.com/klauspost/compress/zstd" +) + +type ( + // A struct that wraps a String for compression. + compress struct{ str String } + + // A struct that wraps a String for decompression. + decompress struct{ str String } +) + +// Compress returns a compress struct wrapping the given String. +func (s String) Compress() compress { return compress{s} } + +// Decompress returns a decompress struct wrapping the given String. +func (s String) Decompress() decompress { return decompress{s} } + +// Zstd compresses the wrapped String using the zstd compression algorithm and +// returns the compressed data as a String. +func (c compress) Zstd() String { + buffer := new(bytes.Buffer) + writer, _ := zstd.NewWriter(buffer) + + _, _ = io.WriteString(writer, c.str.Std()) + _ = writer.Flush() + _ = writer.Close() + + return String(buffer.Bytes()) +} + +// Zstd decompresses the wrapped String using the zstd compression algorithm and +// returns the decompressed data as a Result[String]. +func (d decompress) Zstd() Result[String] { + reader, err := zstd.NewReader(d.str.Reader()) + if err != nil { + reader.Close() + return Err[String](err) + } + + defer reader.Close() + + buffer := new(bytes.Buffer) + if _, err := io.Copy(buffer, reader); err != nil { + return Err[String](err) + } + + return Ok(String(buffer.Bytes())) +} + +// Brotli compresses the wrapped String using the Brotli compression algorithm and +// returns the compressed data as a String. +func (c compress) Brotli() String { + buffer := new(bytes.Buffer) + writer := brotli.NewWriter(buffer) + + _, _ = io.WriteString(writer, c.str.Std()) + _ = writer.Flush() + _ = writer.Close() + + return String(buffer.Bytes()) +} + +// Brotli decompresses the wrapped String using the Brotli compression algorithm and +// returns the decompressed data as a Result[String]. +func (d decompress) Brotli() Result[String] { + reader := brotli.NewReader(d.str.Reader()) + + buffer := new(bytes.Buffer) + if _, err := io.Copy(buffer, reader); err != nil { + return Err[String](err) + } + + return Ok(String(buffer.Bytes())) +} + +// Zlib compresses the wrapped String using the zlib compression algorithm and +// returns the compressed data as a String. +func (c compress) Zlib() String { + // gzcompress() php + buffer := new(bytes.Buffer) + writer := zlib.NewWriter(buffer) + + _, _ = io.WriteString(writer, c.str.Std()) + _ = writer.Flush() + _ = writer.Close() + + return String(buffer.Bytes()) +} + +// Zlib decompresses the wrapped String using the zlib compression algorithm and +// returns the decompressed data as a Result[String]. +func (d decompress) Zlib() Result[String] { + // gzuncompress() php + reader, err := zlib.NewReader(d.str.Reader()) + if err != nil { + return Err[String](err) + } + + defer reader.Close() + + buffer := new(bytes.Buffer) + if _, err := io.Copy(buffer, reader); err != nil { + return Err[String](err) + } + + return Ok(String(buffer.Bytes())) +} + +// Gzip compresses the wrapped String using the gzip compression format and +// returns the compressed data as a String. +func (c compress) Gzip() String { + // gzencode() php + buffer := new(bytes.Buffer) + writer := gzip.NewWriter(buffer) + + _, _ = io.WriteString(writer, c.str.Std()) + _ = writer.Flush() + _ = writer.Close() + + return String(buffer.Bytes()) +} + +// Gzip decompresses the wrapped String using the gzip compression format and +// returns the decompressed data as a Result[String]. +func (d decompress) Gzip() Result[String] { + // gzdecode() php + reader, err := gzip.NewReader(d.str.Reader()) + if err != nil { + return Err[String](err) + } + + defer reader.Close() + + buffer := new(bytes.Buffer) + if _, err := io.Copy(buffer, reader); err != nil { + return Err[String](err) + } + + return Ok(String(buffer.Bytes())) +} + +// Flate compresses the wrapped String using the flate (zlib) compression algorithm +// and returns the compressed data as a String. +// It accepts an optional compression level. If no level is provided, it defaults to 7. +func (c compress) Flate(level ...int) String { + // gzdeflate() php + buffer := new(bytes.Buffer) + + l := 7 + if len(level) != 0 { + l = level[0] + } + + writer, _ := flate.NewWriter(buffer, l) + + _, _ = io.WriteString(writer, c.str.Std()) + _ = writer.Flush() + _ = writer.Close() + + return String(buffer.Bytes()) +} + +// Flate decompresses the wrapped String using the flate (zlib) compression algorithm +// and returns the decompressed data as a Result[String]. +func (d decompress) Flate() Result[String] { + // gzinflate() php + reader := flate.NewReader(d.str.Reader()) + defer reader.Close() + + buffer := new(bytes.Buffer) + if _, err := io.Copy(buffer, reader); err != nil { + return Err[String](err) + } + + return Ok(String(buffer.Bytes())) +} diff --git a/backend/vendor/github.com/enetx/g/string_encdec.go b/backend/vendor/github.com/enetx/g/string_encdec.go new file mode 100644 index 0000000..99ab3e7 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/string_encdec.go @@ -0,0 +1,218 @@ +package g + +import ( + "encoding/base64" + "encoding/hex" + "encoding/json" + "html" + "net/url" + "strconv" +) + +type ( + // A struct that wraps an String for encoding. + encode struct{ str String } + + // A struct that wraps an String for decoding. + decode struct{ str String } +) + +// Encode returns an encode struct wrapping the given String. +func (s String) Encode() encode { return encode{s} } + +// Decode returns a decode struct wrapping the given String. +func (s String) Decode() decode { return decode{s} } + +// Base64 encodes the wrapped String using Base64 and returns the encoded result as an String. +func (e encode) Base64() String { return String(base64.StdEncoding.EncodeToString(e.str.Bytes())) } + +// Base64 decodes the wrapped String using Base64 and returns the decoded result as Result[String]. +func (d decode) Base64() Result[String] { + decoded, err := base64.StdEncoding.DecodeString(d.str.Std()) + if err != nil { + return Err[String](err) + } + + return Ok(String(decoded)) +} + +// JSON encodes the provided string as JSON and returns the result as Result[String]. +func (e encode) JSON() Result[String] { + jsonData, err := json.Marshal(e.str) + if err != nil { + return Err[String](err) + } + + return Ok(String(jsonData)) +} + +// JSON decodes the provided JSON string and returns the result as Result[String]. +func (d decode) JSON() Result[String] { + var data String + err := json.Unmarshal(d.str.Bytes(), &data) + if err != nil { + return Err[String](err) + } + + return Ok(data) +} + +// URL encodes the input string, escaping reserved characters as per RFC 2396. +// If safe characters are provided, they will not be encoded. +// +// Parameters: +// +// - safe (String): Optional. Characters to exclude from encoding. +// If provided, the function will not encode these characters. +// +// Returns: +// +// - String: Encoded URL string. +func (e encode) URL(safe ...String) String { + reserved := String(";/?:@&=+$,") // Reserved characters as per RFC 2396 + if len(safe) != 0 { + reserved = safe[0] + } + + var b Builder + + for _, r := range e.str { + if reserved.ContainsRune(r) { + b.WriteRune(r) + continue + } + + _, _ = b.WriteString(String(url.QueryEscape(string(r)))) + } + + return b.String() +} + +// URL URL-decodes the wrapped String and returns the decoded result as Result[String]. +func (d decode) URL() Result[String] { + result, err := url.QueryUnescape(d.str.Std()) + if err != nil { + return Err[String](err) + } + + return Ok(String(result)) +} + +// HTML HTML-encodes the wrapped String and returns the encoded result as an String. +func (e encode) HTML() String { return String(html.EscapeString(e.str.Std())) } + +// HTML HTML-decodes the wrapped String and returns the decoded result as an String. +func (d decode) HTML() String { return String(html.UnescapeString(d.str.Std())) } + +// Rot13 encodes the wrapped String using ROT13 cipher and returns the encoded result as an +// String. +func (e encode) Rot13() String { + rot := func(r rune) rune { + switch { + case r >= 'A' && r <= 'Z': + return 'A' + (r-'A'+13)%26 + case r >= 'a' && r <= 'z': + return 'a' + (r-'a'+13)%26 + default: + return r + } + } + + return e.str.Map(rot) +} + +// Rot13 decodes the wrapped String using ROT13 cipher and returns the decoded result as an +// String. +func (d decode) Rot13() String { return d.str.Encode().Rot13() } + +// XOR encodes the wrapped String using XOR cipher with the given key and returns the encoded +// result as an String. +func (e encode) XOR(key String) String { + if key.Empty() { + return e.str + } + + encrypted := e.str.Bytes() + + for i := range len(e.str) { + encrypted[i] ^= key[i%len(key)] + } + + return String(encrypted) +} + +// XOR decodes the wrapped String using XOR cipher with the given key and returns the decoded +// result as an String. +func (d decode) XOR(key String) String { return d.str.Encode().XOR(key) } + +// Hex hex-encodes the wrapped String and returns the encoded result as an String. +func (e encode) Hex() String { + var b Builder + for i := range len(e.str) { + b.WriteString(Int(e.str[i]).Hex()) + } + + return b.String() +} + +// Hex hex-decodes the wrapped String and returns the decoded result as Result[String]. +func (d decode) Hex() Result[String] { + result, err := hex.DecodeString(d.str.Std()) + if err != nil { + return Err[String](err) + } + + return Ok(String(result)) +} + +// Octal returns the octal representation of the encoded string. +func (e encode) Octal() String { + result := NewSlice[String](e.str.LenRunes()) + for i, char := range e.str.Runes() { + result.Set(Int(i), Int(char).Octal()) + } + + return result.Join(" ") +} + +// Octal returns the octal representation of the decimal-encoded string as Result[String]. +func (d decode) Octal() Result[String] { + var b Builder + + for v := range d.str.Split(" ") { + n, err := strconv.ParseUint(v.Std(), 8, 32) + if err != nil { + return Err[String](err) + } + + b.WriteRune(rune(n)) + } + + return Ok(b.String()) +} + +// Binary converts the wrapped String to its binary representation as an String. +func (e encode) Binary() String { + var b Builder + for i := range len(e.str) { + b.WriteString(Int(e.str[i]).Binary()) + } + + return b.String() +} + +// Binary converts the wrapped binary String back to its original String representation as Result[String]. +func (d decode) Binary() Result[String] { + var result Bytes + + for i := 0; i+8 <= len(d.str); i += 8 { + b, err := strconv.ParseUint(d.str[i:i+8].Std(), 2, 8) + if err != nil { + return Err[String](err) + } + + result = append(result, byte(b)) + } + + return Ok(result.String()) +} diff --git a/backend/vendor/github.com/enetx/g/string_hash.go b/backend/vendor/github.com/enetx/g/string_hash.go new file mode 100644 index 0000000..1629f32 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/string_hash.go @@ -0,0 +1,19 @@ +package g + +// A struct that wraps an String for hashing. +type shash struct{ str String } + +// Hash returns a shash struct wrapping the given String. +func (s String) Hash() shash { return shash{s} } + +// MD5 computes the MD5 hash of the wrapped String and returns the hash as an String. +func (sh shash) MD5() String { return sh.str.Bytes().Hash().MD5().String() } + +// SHA1 computes the SHA1 hash of the wrapped String and returns the hash as an String. +func (sh shash) SHA1() String { return sh.str.Bytes().Hash().SHA1().String() } + +// SHA256 computes the SHA256 hash of the wrapped String and returns the hash as an String. +func (sh shash) SHA256() String { return sh.str.Bytes().Hash().SHA256().String() } + +// SHA512 computes the SHA512 hash of the wrapped String and returns the hash as an String. +func (sh shash) SHA512() String { return sh.str.Bytes().Hash().SHA512().String() } diff --git a/backend/vendor/github.com/enetx/g/string_regexp.go b/backend/vendor/github.com/enetx/g/string_regexp.go new file mode 100644 index 0000000..91c4e83 --- /dev/null +++ b/backend/vendor/github.com/enetx/g/string_regexp.go @@ -0,0 +1,173 @@ +package g + +import ( + "regexp" + + "github.com/enetx/g/f" +) + +// regexps struct wraps a String and provides regex-related methods. +type regexps struct{ str String } + +// Regexp wraps a String into an re struct to provide regex-related methods. +func (s String) Regexp() regexps { return regexps{s} } + +// Find searches the String for the first occurrence of the regulare xpression pattern +// and returns an Option[String] containing the matched substring. +// If no match is found, it returns None. +func (r regexps) Find(pattern *regexp.Regexp) Option[String] { + result := String(pattern.FindString(r.str.Std())) + if result.Empty() { + return None[String]() + } + + return Some(result) +} + +// Replace replaces all occurrences of the regular expression matches in the String +// with the provided newS (as a String) and returns the resulting String after the replacement. +func (r regexps) Replace(pattern *regexp.Regexp, newS String) String { + return String(pattern.ReplaceAllString(r.str.Std(), newS.Std())) +} + +// ReplaceBy replaces all occurrences of the regular expression matches in the String +// by applying a custom transformation function to each match. +// The function `fn` takes a String representing a match and returns a String that will replace it. +func (r regexps) ReplaceBy(pattern *regexp.Regexp, fn func(match String) String) String { + return String(pattern.ReplaceAllStringFunc(r.str.Std(), func(s string) string { return fn(String(s)).Std() })) +} + +// Match checks if the String contains a match for the specified regular expression pattern. +func (r regexps) Match(pattern *regexp.Regexp) bool { return f.Match[String](pattern)(r.str) } + +// MatchAny checks if the String contains a match for any of the specified regular +// expression patterns. +func (r regexps) MatchAny(patterns ...*regexp.Regexp) bool { + return Slice[*regexp.Regexp](patterns). + Iter(). + Any(func(pattern *regexp.Regexp) bool { return r.Match(pattern) }) +} + +// MatchAll checks if the String contains a match for all of the specified regular expression patterns. +func (r regexps) MatchAll(patterns ...*regexp.Regexp) bool { + return Slice[*regexp.Regexp](patterns). + Iter(). + All(func(pattern *regexp.Regexp) bool { return r.Match(pattern) }) +} + +// Split splits the String into substrings using the provided regular expression pattern and returns an Slice[String] of the results. +// The regular expression pattern is provided as a regexp.Regexp parameter. +func (r regexps) Split(pattern *regexp.Regexp) Slice[String] { + return TransformSlice(pattern.Split(r.str.Std(), -1), NewString) +} + +// SplitN splits the String into substrings using the provided regular expression pattern and returns an Slice[String] of the results. +// The regular expression pattern is provided as a regexp.Regexp parameter. +// The n parameter controls the number of substrings to return: +// - If n is negative, there is no limit on the number of substrings returned. +// - If n is zero, an empty Slice[String] is returned. +// - If n is positive, at most n substrings are returned. +func (r regexps) SplitN(pattern *regexp.Regexp, n Int) Option[Slice[String]] { + result := TransformSlice(pattern.Split(r.str.Std(), n.Std()), NewString) + if result.Empty() { + return None[Slice[String]]() + } + + return Some(result) +} + +// RxIndex searches for the first occurrence of the regular expression pattern in the String. +// If a match is found, it returns an Option containing an Slice with the start and end indices of the match. +// If no match is found, it returns None. +func (r regexps) Index(pattern *regexp.Regexp) Option[Slice[Int]] { + result := TransformSlice(pattern.FindStringIndex(r.str.Std()), NewInt) + if result.Empty() { + return None[Slice[Int]]() + } + + return Some(result) +} + +// FindAll searches the String for all occurrences of the regular expression pattern +// and returns an Option[Slice[String]] containing a slice of matched substrings. +// If no matches are found, the Option[Slice[String]] will be None. +func (r regexps) FindAll(pattern *regexp.Regexp) Option[Slice[String]] { + return r.FindAllN(pattern, -1) +} + +// FindAllN searches the String for up to n occurrences of the regular expression pattern +// and returns an Option[Slice[String]] containing a slice of matched substrings. +// If no matches are found, the Option[Slice[String]] will be None. +// If n is negative, all occurrences will be returned. +func (r regexps) FindAllN(pattern *regexp.Regexp, n Int) Option[Slice[String]] { + result := TransformSlice(pattern.FindAllString(r.str.Std(), n.Std()), NewString) + if result.Empty() { + return None[Slice[String]]() + } + + return Some(result) +} + +// FindSubmatch searches the String for the first occurrence of the regular expression pattern +// and returns an Option[Slice[String]] containing the matched substrings and submatches. +// The Option will contain an Slice[String] with the full match at index 0, followed by any captured submatches. +// If no match is found, it returns None. +func (r regexps) FindSubmatch(pattern *regexp.Regexp) Option[Slice[String]] { + result := TransformSlice(pattern.FindStringSubmatch(r.str.Std()), NewString) + if result.Empty() { + return None[Slice[String]]() + } + + return Some(result) +} + +// FindAllSubmatch searches the String for all occurrences of the regular expression pattern +// and returns an Option[Slice[Slice[String]]] containing the matched substrings and submatches. +// The Option[Slice[Slice[String]]] will contain an Slice[String] for each match, +// where each Slice[String] will contain the full match at index 0, followed by any captured submatches. +// If no match is found, the Option[Slice[Slice[String]]] will be None. +// This method is equivalent to calling SubmatchAllRegexpN with n = -1, which means it finds all occurrences. +func (r regexps) FindAllSubmatch(pattern *regexp.Regexp) Option[Slice[Slice[String]]] { + return r.FindAllSubmatchN(pattern, -1) +} + +// FindAllSubmatchN searches the String for occurrences of the regular expression pattern +// and returns an Option[Slice[Slice[String]]] containing the matched substrings and submatches. +// The Option[Slice[Slice[String]]] will contain an Slice[String] for each match, +// where each Slice[String] will contain the full match at index 0, followed by any captured submatches. +// If no match is found, the Option[Slice[Slice[String]]] will be None. +// The 'n' parameter specifies the maximum number of matches to find. If n is negative, it finds all occurrences. +func (r regexps) FindAllSubmatchN(pattern *regexp.Regexp, n Int) Option[Slice[Slice[String]]] { + var result Slice[Slice[String]] + + for _, v := range pattern.FindAllStringSubmatch(r.str.Std(), n.Std()) { + result = append(result, TransformSlice(v, NewString)) + } + + if result.Empty() { + return None[Slice[Slice[String]]]() + } + + return Some(result) +} + +// Compile compiles the String into a regular expression (regexp.Regexp). +// +// This method attempts to compile the String receiver into a regular expression using the +// regexp.Compile function from the standard library. If the compilation is successful, +// the function returns a Result containing the compiled *regexp.Regexp. If the compilation +// fails due to an invalid regular expression pattern, the Result will contain the error. +// +// Returns: +// - Result[*regexp.Regexp]: A Result containing the compiled *regexp.Regexp if successful, or an error otherwise. +// +// Example usage: +// +// s := g.String(`^\d+$`) +// compiledRegex := s.Regexp().Compile() +// if compiledRegex.IsOk() { +// fmt.Println("Regex compiled successfully") +// } else { +// fmt.Println("Failed to compile regex:", compiledRegex.Err()) +// } +func (r regexps) Compile() Result[*regexp.Regexp] { return ResultOf(regexp.Compile(r.str.Std())) } diff --git a/backend/vendor/github.com/enetx/g/types.go b/backend/vendor/github.com/enetx/g/types.go new file mode 100644 index 0000000..cfadacb --- /dev/null +++ b/backend/vendor/github.com/enetx/g/types.go @@ -0,0 +1,170 @@ +package g + +import ( + "os" + "sync" + + "github.com/enetx/g/cmp" + "github.com/enetx/iter" +) + +type ( + // Result is a generic struct for representing a result value along with an error. + Result[T any] struct { + v T // Value. + err error // Associated error. + } + + // Option is a generic struct for representing an optional value. + Option[T any] struct { + v T // Value. + isSome bool // Indicator of value presence. + } + + // Unit represents an empty value. + // Used in contexts where a function needs to return "something" but + // the actual value doesn't matter, only success/failure status. + Unit struct{} + + // File is a struct that represents a file along with an iterator for reading lines. + File struct { + file *os.File // Underlying os.File. + name String // File name. + guard bool // Guard indicates whether the file is protected against concurrent access. + } + + // Dir is a struct representing a directory path. + Dir struct { + path String // Directory path. + } + + // String is an alias for the string type. + String string + + // Int is an alias for the int type. + Int int + + // Float is an alias for the float64 type. + Float float64 + + // Bytes is an alias for the []byte type. + Bytes []byte + + // Slice is a generic alias for a slice. + Slice[T any] []T + + // Map is a generic alias for a map. + Map[K comparable, V any] map[K]V + + // MapEntry provides a view into a single key of a Map. + // It exposes a fluent, chain-friendly interface for inspecting, inserting, + // mutating, or deleting a value with a single key lookup. + MapEntry[K comparable, V any] struct { + m Map[K, V] + key K + } + + // MapSafeEntry provides a view into a single key of a concurrent-safe Map. + // It exposes a fluent, chain-friendly interface for inspecting, inserting, + // mutating, or deleting a value with a single key lookup. + MapSafeEntry[K comparable, V any] struct { + m *MapSafe[K, V] + key K + } + + // Set is a generic alias for a set implemented using a map. + Set[T comparable] map[T]struct{} + + // Pair is a struct representing a key-value Pair for MapOrd. + Pair[K, V any] = iter.Pair[K, V] + + // MapOrd is an ordered map that maintains insertion order using a slice for pairs + // and a map for fast index lookups. + MapOrd[K comparable, V any] []Pair[K, V] // ordered key-value pairs + + // MapOrdEntry provides a view into a single key of an ordered Map (MapOrd), + // enabling fluent insertion, mutation, and deletion while preserving entry order. + MapOrdEntry[K comparable, V any] struct { + mo *MapOrd[K, V] + key K + } + + // MapSafe is a concurrent-safe generic map built on sync.Map. + MapSafe[K comparable, V any] struct { + data sync.Map + } + + // Heap is a generic binary heap data structure that maintains elements in heap order. + // It can be configured as either a min-heap or max-heap based on the comparison function. + Heap[T any] struct { + data Slice[T] + cmp func(T, T) cmp.Ordering + } + + // Deque is a double-ended queue implemented with a growable ring buffer. + // It provides efficient insertion and removal of elements at both ends. + Deque[T any] struct { + data Slice[T] + front Int + len Int + } + + // Named is a map-like type that stores key-value pairs for resolving named + // placeholders in Sprintf. + Named Map[String, any] + + // SeqSet is an iterator over sequences of unique values. + SeqSet[V comparable] iter.Seq[V] + + // SeqSlice is an iterator over sequences of individual values. + SeqSlice[V any] iter.Seq[V] + + // SeqHeap is an iterator over sequences of Heap values. + SeqHeap[V any] iter.Seq[V] + + // SeqDeque is an iterator over sequences of Deque values. + SeqDeque[V any] iter.Seq[V] + + // SeqResult is an iterator over sequences of Result[V] values. + SeqResult[V any] iter.Seq[Result[V]] + + // SeqSlices is an iterator over slices of sequences of individual values. + SeqSlices[V any] iter.Seq[[]V] + + // SeqMapOrd is an iterator over sequences of ordered pairs of values, most commonly ordered key-value pairs. + SeqMapOrd[K comparable, V any] iter.Seq2[K, V] + + // SeqMap is an iterator over sequences of pairs of values, most commonly key-value pairs. + SeqMap[K comparable, V any] iter.Seq2[K, V] + + // SeqSlicePar is a parallel iterator over a slice of elements of type T. + // It uses a fixed-size pool of worker goroutines to process elements concurrently. + SeqSlicePar[V any] struct { + seq SeqSlice[V] + workers Int + process func(V) (V, bool) + } + + // SeqMapPar is the parallel version of SeqMap[K,V]. + SeqMapPar[K comparable, V any] struct { + seq SeqMap[K, V] + workers Int + process func(Pair[K, V]) (Pair[K, V], bool) + } + + // SeqDequePar is a parallel iterator over a deque of elements of type T. + // It uses a fixed-size pool of worker goroutines to process elements concurrently. + SeqDequePar[V any] struct { + seq SeqDeque[V] + workers Int + process func(V) (V, bool) + } + + // SeqHeapPar is a parallel iterator over a heap of elements of type T. + // It uses a fixed-size pool of worker goroutines to process elements concurrently. + SeqHeapPar[V any] struct { + seq SeqHeap[V] + workers Int + process func(V) (V, bool) + } +) diff --git a/backend/vendor/github.com/enetx/http/client.go b/backend/vendor/github.com/enetx/http/client.go new file mode 100644 index 0000000..9a2b6ee --- /dev/null +++ b/backend/vendor/github.com/enetx/http/client.go @@ -0,0 +1,1041 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// HTTP client. See RFC 7230 through 7235. +// +// This is the high-level Client interface. +// The low-level implementation is in transport.go. + +package http + +import ( + "context" + "crypto/tls" + "encoding/base64" + "errors" + "fmt" + "io" + "log" + "net/url" + "reflect" + "slices" + "strings" + "sync" + "sync/atomic" + "time" + + "github.com/enetx/http/internal/ascii" +) + +// A Client is an HTTP client. Its zero value ([DefaultClient]) is a +// usable client that uses [DefaultTransport]. +// +// The [Client.Transport] typically has internal state (cached TCP +// connections), so Clients should be reused instead of created as +// needed. Clients are safe for concurrent use by multiple goroutines. +// +// A Client is higher-level than a [RoundTripper] (such as [Transport]) +// and additionally handles HTTP details such as cookies and +// redirects. +// +// When following redirects, the Client will forward all headers set on the +// initial [Request] except: +// +// - when forwarding sensitive headers like "Authorization", +// "WWW-Authenticate", and "Cookie" to untrusted targets. +// These headers will be ignored when following a redirect to a domain +// that is not a subdomain match or exact match of the initial domain. +// For example, a redirect from "foo.com" to either "foo.com" or "sub.foo.com" +// will forward the sensitive headers, but a redirect to "bar.com" will not. +// - when forwarding the "Cookie" header with a non-nil cookie Jar. +// Since each redirect may mutate the state of the cookie jar, +// a redirect may possibly alter a cookie set in the initial request. +// When forwarding the "Cookie" header, any mutated cookies will be omitted, +// with the expectation that the Jar will insert those mutated cookies +// with the updated values (assuming the origin matches). +// If Jar is nil, the initial cookies are forwarded without change. +type Client struct { + // Transport specifies the mechanism by which individual + // HTTP requests are made. + // If nil, DefaultTransport is used. + Transport RoundTripper + + // CheckRedirect specifies the policy for handling redirects. + // If CheckRedirect is not nil, the client calls it before + // following an HTTP redirect. The arguments req and via are + // the upcoming request and the requests made already, oldest + // first. If CheckRedirect returns an error, the Client's Get + // method returns both the previous Response (with its Body + // closed) and CheckRedirect's error (wrapped in a url.Error) + // instead of issuing the Request req. + // As a special case, if CheckRedirect returns ErrUseLastResponse, + // then the most recent response is returned with its body + // unclosed, along with a nil error. + // + // If CheckRedirect is nil, the Client uses its default policy, + // which is to stop after 10 consecutive requests. + CheckRedirect func(req *Request, via []*Request) error + + // Jar specifies the cookie jar. + // + // The Jar is used to insert relevant cookies into every + // outbound Request and is updated with the cookie values + // of every inbound Response. The Jar is consulted for every + // redirect that the Client follows. + // + // If Jar is nil, cookies are only sent if they are explicitly + // set on the Request. + Jar CookieJar + + // Timeout specifies a time limit for requests made by this + // Client. The timeout includes connection time, any + // redirects, and reading the response body. The timer remains + // running after Get, Head, Post, or Do return and will + // interrupt reading of the Response.Body. + // + // A Timeout of zero means no timeout. + // + // The Client cancels requests to the underlying Transport + // as if the Request's Context ended. + // + // For compatibility, the Client will also use the deprecated + // CancelRequest method on Transport if found. New + // RoundTripper implementations should use the Request's Context + // for cancellation instead of implementing CancelRequest. + Timeout time.Duration +} + +// DefaultClient is the default [Client] and is used by [Get], [Head], and [Post]. +var DefaultClient = &Client{} + +// RoundTripper is an interface representing the ability to execute a +// single HTTP transaction, obtaining the [Response] for a given [Request]. +// +// A RoundTripper must be safe for concurrent use by multiple +// goroutines. +type RoundTripper interface { + // RoundTrip executes a single HTTP transaction, returning + // a Response for the provided Request. + // + // RoundTrip should not attempt to interpret the response. In + // particular, RoundTrip must return err == nil if it obtained + // a response, regardless of the response's HTTP status code. + // A non-nil err should be reserved for failure to obtain a + // response. Similarly, RoundTrip should not attempt to + // handle higher-level protocol details such as redirects, + // authentication, or cookies. + // + // RoundTrip should not modify the request, except for + // consuming and closing the Request's Body. RoundTrip may + // read fields of the request in a separate goroutine. Callers + // should not mutate or reuse the request until the Response's + // Body has been closed. + // + // RoundTrip must always close the body, including on errors, + // but depending on the implementation may do so in a separate + // goroutine even after RoundTrip returns. This means that + // callers wanting to reuse the body for subsequent requests + // must arrange to wait for the Close call before doing so. + // + // The Request's URL and Header fields must be initialized. + RoundTrip(*Request) (*Response, error) +} + +// refererForURL returns a referer without any authentication info or +// an empty string if lastReq scheme is https and newReq scheme is http. +// If the referer was explicitly set, then it will continue to be used. +func refererForURL(lastReq, newReq *url.URL, explicitRef string) string { + // https://tools.ietf.org/html/rfc7231#section-5.5.2 + // "Clients SHOULD NOT include a Referer header field in a + // (non-secure) HTTP request if the referring page was + // transferred with a secure protocol." + if lastReq.Scheme == "https" && newReq.Scheme == "http" { + return "" + } + if explicitRef != "" { + return explicitRef + } + + referer := lastReq.String() + if lastReq.User != nil { + // This is not very efficient, but is the best we can + // do without: + // - introducing a new method on URL + // - creating a race condition + // - copying the URL struct manually, which would cause + // maintenance problems down the line + auth := lastReq.User.String() + "@" + referer = strings.Replace(referer, auth, "", 1) + } + return referer +} + +// didTimeout is non-nil only if err != nil. +func (c *Client) send(req *Request, deadline time.Time) (resp *Response, didTimeout func() bool, err error) { + if c.Jar != nil { + for _, cookie := range c.Jar.Cookies(req.URL) { + req.AddCookie(cookie) + } + } + resp, didTimeout, err = send(req, c.transport(), deadline) + if err != nil { + return nil, didTimeout, err + } + if c.Jar != nil { + if rc := resp.Cookies(); len(rc) > 0 { + c.Jar.SetCookies(req.URL, rc) + } + } + return resp, nil, nil +} + +func (c *Client) deadline() time.Time { + if c.Timeout > 0 { + return time.Now().Add(c.Timeout) + } + return time.Time{} +} + +func (c *Client) transport() RoundTripper { + if c.Transport != nil { + return c.Transport + } + return DefaultTransport +} + +// ErrSchemeMismatch is returned when a server returns an HTTP response to an HTTPS client. +var ErrSchemeMismatch = errors.New("http: server gave HTTP response to HTTPS client") + +// send issues an HTTP request. +// Caller should close resp.Body when done reading from it. +func send(ireq *Request, rt RoundTripper, deadline time.Time) (resp *Response, didTimeout func() bool, err error) { + req := ireq // req is either the original request, or a modified fork + + if rt == nil { + req.closeBody() + return nil, alwaysFalse, errors.New("http: no Client.Transport or DefaultTransport") + } + + if req.URL == nil { + req.closeBody() + return nil, alwaysFalse, errors.New("http: nil Request.URL") + } + + if req.RequestURI != "" { + req.closeBody() + return nil, alwaysFalse, errors.New("http: Request.RequestURI can't be set in client requests") + } + + // forkReq forks req into a shallow clone of ireq the first + // time it's called. + forkReq := func() { + if ireq == req { + req = new(Request) + *req = *ireq // shallow clone + } + } + + // Most the callers of send (Get, Post, et al) don't need + // Headers, leaving it uninitialized. We guarantee to the + // Transport that this has been initialized, though. + if req.Header == nil { + forkReq() + req.Header = make(Header) + } + + if u := req.URL.User; u != nil && req.Header.Get("Authorization") == "" { + username := u.Username() + password, _ := u.Password() + forkReq() + req.Header = cloneOrMakeHeader(ireq.Header) + req.Header.Set("Authorization", "Basic "+basicAuth(username, password)) + } + + if !deadline.IsZero() { + forkReq() + } + stopTimer, didTimeout := setRequestCancel(req, rt, deadline) + + resp, err = rt.RoundTrip(req) + if err != nil { + stopTimer() + if resp != nil { + log.Printf("RoundTripper returned a response & error; ignoring response") + } + if tlsErr, ok := err.(tls.RecordHeaderError); ok { + // If we get a bad TLS record header, check to see if the + // response looks like HTTP and give a more helpful error. + // See golang.org/issue/11111. + if string(tlsErr.RecordHeader[:]) == "HTTP/" { + err = ErrSchemeMismatch + } + } + return nil, didTimeout, err + } + if resp == nil { + return nil, didTimeout, fmt.Errorf("http: RoundTripper implementation (%T) returned a nil *Response with a nil error", rt) + } + if resp.Body == nil { + // The documentation on the Body field says “The http Client and Transport + // guarantee that Body is always non-nil, even on responses without a body + // or responses with a zero-length body.” Unfortunately, we didn't document + // that same constraint for arbitrary RoundTripper implementations, and + // RoundTripper implementations in the wild (mostly in tests) assume that + // they can use a nil Body to mean an empty one (similar to Request.Body). + // (See https://golang.org/issue/38095.) + // + // If the ContentLength allows the Body to be empty, fill in an empty one + // here to ensure that it is non-nil. + if resp.ContentLength > 0 && req.Method != "HEAD" { + return nil, didTimeout, fmt.Errorf("http: RoundTripper implementation (%T) returned a *Response with content length %d but a nil Body", rt, resp.ContentLength) + } + resp.Body = io.NopCloser(strings.NewReader("")) + } + if !deadline.IsZero() { + resp.Body = &cancelTimerBody{ + stop: stopTimer, + rc: resp.Body, + reqDidTimeout: didTimeout, + } + } + return resp, nil, nil +} + +// timeBeforeContextDeadline reports whether the non-zero Time t is +// before ctx's deadline, if any. If ctx does not have a deadline, it +// always reports true (the deadline is considered infinite). +func timeBeforeContextDeadline(t time.Time, ctx context.Context) bool { + d, ok := ctx.Deadline() + if !ok { + return true + } + return t.Before(d) +} + +// knownRoundTripperImpl reports whether rt is a RoundTripper that's +// maintained by the Go team and known to implement the latest +// optional semantics (notably contexts). The Request is used +// to check whether this particular request is using an alternate protocol, +// in which case we need to check the RoundTripper for that protocol. +func knownRoundTripperImpl(rt RoundTripper, req *Request) bool { + switch t := rt.(type) { + case *Transport: + if altRT := t.alternateRoundTripper(req); altRT != nil { + return knownRoundTripperImpl(altRT, req) + } + return true + case *http2Transport, http2noDialH2RoundTripper: + return true + } + // There's a very minor chance of a false positive with this. + // Instead of detecting our golang.org/x/net/http2.Transport, + // it might detect a Transport type in a different http2 + // package. But I know of none, and the only problem would be + // some temporarily leaked goroutines if the transport didn't + // support contexts. So this is a good enough heuristic: + if reflect.TypeOf(rt).String() == "*http2.Transport" { + return true + } + return false +} + +// setRequestCancel sets req.Cancel and adds a deadline context to req +// if deadline is non-zero. The RoundTripper's type is used to +// determine whether the legacy CancelRequest behavior should be used. +// +// As background, there are three ways to cancel a request: +// First was Transport.CancelRequest. (deprecated) +// Second was Request.Cancel. +// Third was Request.Context. +// This function populates the second and third, and uses the first if it really needs to. +func setRequestCancel(req *Request, rt RoundTripper, deadline time.Time) (stopTimer func(), didTimeout func() bool) { + if deadline.IsZero() { + return nop, alwaysFalse + } + knownTransport := knownRoundTripperImpl(rt, req) + oldCtx := req.Context() + + if req.Cancel == nil && knownTransport { + // If they already had a Request.Context that's + // expiring sooner, do nothing: + if !timeBeforeContextDeadline(deadline, oldCtx) { + return nop, alwaysFalse + } + + var cancelCtx func() + req.ctx, cancelCtx = context.WithDeadline(oldCtx, deadline) + return cancelCtx, func() bool { return time.Now().After(deadline) } + } + initialReqCancel := req.Cancel // the user's original Request.Cancel, if any + + var cancelCtx func() + if timeBeforeContextDeadline(deadline, oldCtx) { + req.ctx, cancelCtx = context.WithDeadline(oldCtx, deadline) + } + + cancel := make(chan struct{}) + req.Cancel = cancel + + doCancel := func() { + // The second way in the func comment above: + close(cancel) + // The first way, used only for RoundTripper + // implementations written before Go 1.5 or Go 1.6. + type canceler interface{ CancelRequest(*Request) } + if v, ok := rt.(canceler); ok { + v.CancelRequest(req) + } + } + + stopTimerCh := make(chan struct{}) + stopTimer = sync.OnceFunc(func() { + close(stopTimerCh) + if cancelCtx != nil { + cancelCtx() + } + }) + + timer := time.NewTimer(time.Until(deadline)) + var timedOut atomic.Bool + + go func() { + select { + case <-initialReqCancel: + doCancel() + timer.Stop() + case <-timer.C: + timedOut.Store(true) + doCancel() + case <-stopTimerCh: + timer.Stop() + } + }() + + return stopTimer, timedOut.Load +} + +// See 2 (end of page 4) https://www.ietf.org/rfc/rfc2617.txt +// "To receive authorization, the client sends the userid and password, +// separated by a single colon (":") character, within a base64 +// encoded string in the credentials." +// It is not meant to be urlencoded. +func basicAuth(username, password string) string { + auth := username + ":" + password + return base64.StdEncoding.EncodeToString([]byte(auth)) +} + +// Get issues a GET to the specified URL. If the response is one of +// the following redirect codes, Get follows the redirect, up to a +// maximum of 10 redirects: +// +// 301 (Moved Permanently) +// 302 (Found) +// 303 (See Other) +// 307 (Temporary Redirect) +// 308 (Permanent Redirect) +// +// An error is returned if there were too many redirects or if there +// was an HTTP protocol error. A non-2xx response doesn't cause an +// error. Any returned error will be of type [*url.Error]. The url.Error +// value's Timeout method will report true if the request timed out. +// +// When err is nil, resp always contains a non-nil resp.Body. +// Caller should close resp.Body when done reading from it. +// +// Get is a wrapper around DefaultClient.Get. +// +// To make a request with custom headers, use [NewRequest] and +// DefaultClient.Do. +// +// To make a request with a specified context.Context, use [NewRequestWithContext] +// and DefaultClient.Do. +func Get(url string) (resp *Response, err error) { + return DefaultClient.Get(url) +} + +// Get issues a GET to the specified URL. If the response is one of the +// following redirect codes, Get follows the redirect after calling the +// [Client.CheckRedirect] function: +// +// 301 (Moved Permanently) +// 302 (Found) +// 303 (See Other) +// 307 (Temporary Redirect) +// 308 (Permanent Redirect) +// +// An error is returned if the [Client.CheckRedirect] function fails +// or if there was an HTTP protocol error. A non-2xx response doesn't +// cause an error. Any returned error will be of type [*url.Error]. The +// url.Error value's Timeout method will report true if the request +// timed out. +// +// When err is nil, resp always contains a non-nil resp.Body. +// Caller should close resp.Body when done reading from it. +// +// To make a request with custom headers, use [NewRequest] and [Client.Do]. +// +// To make a request with a specified context.Context, use [NewRequestWithContext] +// and Client.Do. +func (c *Client) Get(url string) (resp *Response, err error) { + req, err := NewRequest("GET", url, nil) + if err != nil { + return nil, err + } + return c.Do(req) +} + +func alwaysFalse() bool { return false } + +// ErrUseLastResponse can be returned by Client.CheckRedirect hooks to +// control how redirects are processed. If returned, the next request +// is not sent and the most recent response is returned with its body +// unclosed. +var ErrUseLastResponse = errors.New("net/http: use last response") + +// checkRedirect calls either the user's configured CheckRedirect +// function, or the default. +func (c *Client) checkRedirect(req *Request, via []*Request) error { + fn := c.CheckRedirect + if fn == nil { + fn = defaultCheckRedirect + } + return fn(req, via) +} + +// redirectBehavior describes what should happen when the +// client encounters a 3xx status code from the server. +func redirectBehavior(reqMethod string, resp *Response, ireq *Request) (redirectMethod string, shouldRedirect, includeBody bool) { + switch resp.StatusCode { + case 301, 302, 303: + redirectMethod = reqMethod + shouldRedirect = true + includeBody = false + + // RFC 2616 allowed automatic redirection only with GET and + // HEAD requests. RFC 7231 lifts this restriction, but we still + // restrict other methods to GET to maintain compatibility. + // See Issue 18570. + if reqMethod != "GET" && reqMethod != "HEAD" { + redirectMethod = "GET" + } + case 307, 308: + redirectMethod = reqMethod + shouldRedirect = true + includeBody = true + + if ireq.GetBody == nil && ireq.outgoingLength() != 0 { + // We had a request body, and 307/308 require + // re-sending it, but GetBody is not defined. So just + // return this response to the user instead of an + // error, like we did in Go 1.7 and earlier. + shouldRedirect = false + } + } + return redirectMethod, shouldRedirect, includeBody +} + +// urlErrorOp returns the (*url.Error).Op value to use for the +// provided (*Request).Method value. +func urlErrorOp(method string) string { + if method == "" { + return "Get" + } + if lowerMethod, ok := ascii.ToLower(method); ok { + return method[:1] + lowerMethod[1:] + } + return method +} + +// Do sends an HTTP request and returns an HTTP response, following +// policy (such as redirects, cookies, auth) as configured on the +// client. +// +// An error is returned if caused by client policy (such as +// CheckRedirect), or failure to speak HTTP (such as a network +// connectivity problem). A non-2xx status code doesn't cause an +// error. +// +// If the returned error is nil, the [Response] will contain a non-nil +// Body which the user is expected to close. If the Body is not both +// read to EOF and closed, the [Client]'s underlying [RoundTripper] +// (typically [Transport]) may not be able to re-use a persistent TCP +// connection to the server for a subsequent "keep-alive" request. +// +// The request Body, if non-nil, will be closed by the underlying +// Transport, even on errors. The Body may be closed asynchronously after +// Do returns. +// +// On error, any Response can be ignored. A non-nil Response with a +// non-nil error only occurs when CheckRedirect fails, and even then +// the returned [Response.Body] is already closed. +// +// Generally [Get], [Post], or [PostForm] will be used instead of Do. +// +// If the server replies with a redirect, the Client first uses the +// CheckRedirect function to determine whether the redirect should be +// followed. If permitted, a 301, 302, or 303 redirect causes +// subsequent requests to use HTTP method GET +// (or HEAD if the original request was HEAD), with no body. +// A 307 or 308 redirect preserves the original HTTP method and body, +// provided that the [Request.GetBody] function is defined. +// The [NewRequest] function automatically sets GetBody for common +// standard library body types. +// +// Any returned error will be of type [*url.Error]. The url.Error +// value's Timeout method will report true if the request timed out. +func (c *Client) Do(req *Request) (*Response, error) { + return c.do(req) +} + +var testHookClientDoResult func(retres *Response, reterr error) + +func (c *Client) do(req *Request) (retres *Response, reterr error) { + if testHookClientDoResult != nil { + defer func() { testHookClientDoResult(retres, reterr) }() + } + if req.URL == nil { + req.closeBody() + return nil, &url.Error{ + Op: urlErrorOp(req.Method), + Err: errors.New("http: nil Request.URL"), + } + } + _ = *c // panic early if c is nil; see go.dev/issue/53521 + + var ( + deadline = c.deadline() + reqs []*Request + resp *Response + copyHeaders = c.makeHeadersCopier(req) + reqBodyClosed = false // have we closed the current req.Body? + + // Redirect behavior: + redirectMethod string + includeBody = true + stripSensitiveHeaders = false + ) + uerr := func(err error) error { + // the body may have been closed already by c.send() + if !reqBodyClosed { + req.closeBody() + } + var urlStr string + if resp != nil && resp.Request != nil { + urlStr = stripPassword(resp.Request.URL) + } else { + urlStr = stripPassword(req.URL) + } + return &url.Error{ + Op: urlErrorOp(reqs[0].Method), + URL: urlStr, + Err: err, + } + } + for { + // For all but the first request, create the next + // request hop and replace req. + if len(reqs) > 0 { + loc := resp.Header.Get("Location") + if loc == "" { + // While most 3xx responses include a Location, it is not + // required and 3xx responses without a Location have been + // observed in the wild. See issues #17773 and #49281. + return resp, nil + } + u, err := req.URL.Parse(loc) + if err != nil { + resp.closeBody() + return nil, uerr(fmt.Errorf("failed to parse Location header %q: %v", loc, err)) + } + host := "" + if req.Host != "" && req.Host != req.URL.Host { + // If the caller specified a custom Host header and the + // redirect location is relative, preserve the Host header + // through the redirect. See issue #22233. + if u, _ := url.Parse(loc); u != nil && !u.IsAbs() { + host = req.Host + } + } + ireq := reqs[0] + req = &Request{ + Method: redirectMethod, + Response: resp, + URL: u, + Header: make(Header), + Host: host, + Cancel: ireq.Cancel, + ctx: ireq.ctx, + } + if includeBody && ireq.GetBody != nil { + req.Body, err = ireq.GetBody() + if err != nil { + resp.closeBody() + return nil, uerr(err) + } + req.GetBody = ireq.GetBody + req.ContentLength = ireq.ContentLength + } + + // Copy original headers before setting the Referer, + // in case the user set Referer on their first request. + // If they really want to override, they can do it in + // their CheckRedirect func. + if !stripSensitiveHeaders && reqs[0].URL.Host != req.URL.Host { + if !shouldCopyHeaderOnRedirect(reqs[0].URL, req.URL) { + stripSensitiveHeaders = true + } + } + copyHeaders(req, stripSensitiveHeaders) + + // Add the Referer header from the most recent + // request URL to the new one, if it's not https->http: + if ref := refererForURL(reqs[len(reqs)-1].URL, req.URL, req.Header.Get("Referer")); ref != "" { + req.Header.Set("Referer", ref) + } + err = c.checkRedirect(req, reqs) + + // Sentinel error to let users select the + // previous response, without closing its + // body. See Issue 10069. + if err == ErrUseLastResponse { + return resp, nil + } + + // Close the previous response's body. But + // read at least some of the body so if it's + // small the underlying TCP connection will be + // re-used. No need to check for errors: if it + // fails, the Transport won't reuse it anyway. + const maxBodySlurpSize = 2 << 10 + if resp.ContentLength == -1 || resp.ContentLength <= maxBodySlurpSize { + io.CopyN(io.Discard, resp.Body, maxBodySlurpSize) + } + resp.Body.Close() + + if err != nil { + // Special case for Go 1 compatibility: return both the response + // and an error if the CheckRedirect function failed. + // See https://golang.org/issue/3795 + // The resp.Body has already been closed. + ue := uerr(err) + ue.(*url.Error).URL = loc + return resp, ue + } + } + + reqs = append(reqs, req) + var err error + var didTimeout func() bool + if resp, didTimeout, err = c.send(req, deadline); err != nil { + // c.send() always closes req.Body + reqBodyClosed = true + if !deadline.IsZero() && didTimeout() { + err = &timeoutError{err.Error() + " (Client.Timeout exceeded while awaiting headers)"} + } + return nil, uerr(err) + } + + var shouldRedirect, includeBodyOnHop bool + redirectMethod, shouldRedirect, includeBodyOnHop = redirectBehavior(req.Method, resp, reqs[0]) + if !shouldRedirect { + return resp, nil + } + if !includeBodyOnHop { + // Once a hop drops the body, we never send it again + // (because we're now handling a redirect for a request with no body). + includeBody = false + } + + req.closeBody() + } +} + +// makeHeadersCopier makes a function that copies headers from the +// initial Request, ireq. For every redirect, this function must be called +// so that it can copy headers into the upcoming Request. +func (c *Client) makeHeadersCopier(ireq *Request) func(req *Request, stripSensitiveHeaders bool) { + // The headers to copy are from the very initial request. + // We use a closured callback to keep a reference to these original headers. + var ( + ireqhdr = cloneOrMakeHeader(ireq.Header) + icookies map[string][]*Cookie + ) + if c.Jar != nil && ireq.Header.Get("Cookie") != "" { + icookies = make(map[string][]*Cookie) + for _, c := range ireq.Cookies() { + icookies[c.Name] = append(icookies[c.Name], c) + } + } + + return func(req *Request, stripSensitiveHeaders bool) { + // If Jar is present and there was some initial cookies provided + // via the request header, then we may need to alter the initial + // cookies as we follow redirects since each redirect may end up + // modifying a pre-existing cookie. + // + // Since cookies already set in the request header do not contain + // information about the original domain and path, the logic below + // assumes any new set cookies override the original cookie + // regardless of domain or path. + // + // See https://golang.org/issue/17494 + if c.Jar != nil && icookies != nil { + var changed bool + resp := req.Response // The response that caused the upcoming redirect + for _, c := range resp.Cookies() { + if _, ok := icookies[c.Name]; ok { + delete(icookies, c.Name) + changed = true + } + } + if changed { + ireqhdr.Del("Cookie") + var ss []string + for _, cs := range icookies { + for _, c := range cs { + ss = append(ss, c.Name+"="+c.Value) + } + } + slices.Sort(ss) // Ensure deterministic headers + ireqhdr.Set("Cookie", strings.Join(ss, "; ")) + } + } + + // Copy the initial request's Header values + // (at least the safe ones). + for k, vv := range ireqhdr { + sensitive := false + switch CanonicalHeaderKey(k) { + case "Authorization", "Www-Authenticate", "Cookie", "Cookie2", + "Proxy-Authorization", "Proxy-Authenticate": + sensitive = true + } + if !(sensitive && stripSensitiveHeaders) { + req.Header[k] = vv + } + } + } +} + +func defaultCheckRedirect(req *Request, via []*Request) error { + if len(via) >= 10 { + return errors.New("stopped after 10 redirects") + } + return nil +} + +// Post issues a POST to the specified URL. +// +// Caller should close resp.Body when done reading from it. +// +// If the provided body is an [io.Closer], it is closed after the +// request. +// +// Post is a wrapper around DefaultClient.Post. +// +// To set custom headers, use [NewRequest] and DefaultClient.Do. +// +// See the [Client.Do] method documentation for details on how redirects +// are handled. +// +// To make a request with a specified context.Context, use [NewRequestWithContext] +// and DefaultClient.Do. +func Post(url, contentType string, body io.Reader) (resp *Response, err error) { + return DefaultClient.Post(url, contentType, body) +} + +// Post issues a POST to the specified URL. +// +// Caller should close resp.Body when done reading from it. +// +// If the provided body is an [io.Closer], it is closed after the +// request. +// +// To set custom headers, use [NewRequest] and [Client.Do]. +// +// To make a request with a specified context.Context, use [NewRequestWithContext] +// and [Client.Do]. +// +// See the [Client.Do] method documentation for details on how redirects +// are handled. +func (c *Client) Post(url, contentType string, body io.Reader) (resp *Response, err error) { + req, err := NewRequest("POST", url, body) + if err != nil { + return nil, err + } + req.Header.Set("Content-Type", contentType) + return c.Do(req) +} + +// PostForm issues a POST to the specified URL, with data's keys and +// values URL-encoded as the request body. +// +// The Content-Type header is set to application/x-www-form-urlencoded. +// To set other headers, use [NewRequest] and DefaultClient.Do. +// +// When err is nil, resp always contains a non-nil resp.Body. +// Caller should close resp.Body when done reading from it. +// +// PostForm is a wrapper around DefaultClient.PostForm. +// +// See the [Client.Do] method documentation for details on how redirects +// are handled. +// +// To make a request with a specified [context.Context], use [NewRequestWithContext] +// and DefaultClient.Do. +func PostForm(url string, data url.Values) (resp *Response, err error) { + return DefaultClient.PostForm(url, data) +} + +// PostForm issues a POST to the specified URL, +// with data's keys and values URL-encoded as the request body. +// +// The Content-Type header is set to application/x-www-form-urlencoded. +// To set other headers, use [NewRequest] and [Client.Do]. +// +// When err is nil, resp always contains a non-nil resp.Body. +// Caller should close resp.Body when done reading from it. +// +// See the [Client.Do] method documentation for details on how redirects +// are handled. +// +// To make a request with a specified context.Context, use [NewRequestWithContext] +// and Client.Do. +func (c *Client) PostForm(url string, data url.Values) (resp *Response, err error) { + return c.Post(url, "application/x-www-form-urlencoded", strings.NewReader(data.Encode())) +} + +// Head issues a HEAD to the specified URL. If the response is one of +// the following redirect codes, Head follows the redirect, up to a +// maximum of 10 redirects: +// +// 301 (Moved Permanently) +// 302 (Found) +// 303 (See Other) +// 307 (Temporary Redirect) +// 308 (Permanent Redirect) +// +// Head is a wrapper around DefaultClient.Head. +// +// To make a request with a specified [context.Context], use [NewRequestWithContext] +// and DefaultClient.Do. +func Head(url string) (resp *Response, err error) { + return DefaultClient.Head(url) +} + +// Head issues a HEAD to the specified URL. If the response is one of the +// following redirect codes, Head follows the redirect after calling the +// [Client.CheckRedirect] function: +// +// 301 (Moved Permanently) +// 302 (Found) +// 303 (See Other) +// 307 (Temporary Redirect) +// 308 (Permanent Redirect) +// +// To make a request with a specified [context.Context], use [NewRequestWithContext] +// and [Client.Do]. +func (c *Client) Head(url string) (resp *Response, err error) { + req, err := NewRequest("HEAD", url, nil) + if err != nil { + return nil, err + } + return c.Do(req) +} + +// CloseIdleConnections closes any connections on its [Transport] which +// were previously connected from previous requests but are now +// sitting idle in a "keep-alive" state. It does not interrupt any +// connections currently in use. +// +// If [Client.Transport] does not have a [Client.CloseIdleConnections] method +// then this method does nothing. +func (c *Client) CloseIdleConnections() { + type closeIdler interface { + CloseIdleConnections() + } + if tr, ok := c.transport().(closeIdler); ok { + tr.CloseIdleConnections() + } +} + +// cancelTimerBody is an io.ReadCloser that wraps rc with two features: +// 1. On Read error or close, the stop func is called. +// 2. On Read failure, if reqDidTimeout is true, the error is wrapped and +// marked as net.Error that hit its timeout. +type cancelTimerBody struct { + stop func() // stops the time.Timer waiting to cancel the request + rc io.ReadCloser + reqDidTimeout func() bool +} + +func (b *cancelTimerBody) Read(p []byte) (n int, err error) { + n, err = b.rc.Read(p) + if err == nil { + return n, nil + } + if err == io.EOF { + return n, err + } + if b.reqDidTimeout() { + err = &timeoutError{err.Error() + " (Client.Timeout or context cancellation while reading body)"} + } + return n, err +} + +func (b *cancelTimerBody) Close() error { + err := b.rc.Close() + b.stop() + return err +} + +func shouldCopyHeaderOnRedirect(initial, dest *url.URL) bool { + // Permit sending auth/cookie headers from "foo.com" + // to "sub.foo.com". + + // Note that we don't send all cookies to subdomains + // automatically. This function is only used for + // Cookies set explicitly on the initial outgoing + // client request. Cookies automatically added via the + // CookieJar mechanism continue to follow each + // cookie's scope as set by Set-Cookie. But for + // outgoing requests with the Cookie header set + // directly, we don't know their scope, so we assume + // it's for *.domain.com. + + ihost := idnaASCIIFromURL(initial) + dhost := idnaASCIIFromURL(dest) + return isDomainOrSubdomain(dhost, ihost) +} + +// isDomainOrSubdomain reports whether sub is a subdomain (or exact +// match) of the parent domain. +// +// Both domains must already be in canonical form. +func isDomainOrSubdomain(sub, parent string) bool { + if sub == parent { + return true + } + // If sub contains a :, it's probably an IPv6 address (and is definitely not a hostname). + // Don't check the suffix in this case, to avoid matching the contents of a IPv6 zone. + // For example, "::1%.www.example.com" is not a subdomain of "www.example.com". + if strings.ContainsAny(sub, ":%") { + return false + } + // If sub is "foo.example.com" and parent is "example.com", + // that means sub must end in "."+parent. + // Do it without allocating. + if !strings.HasSuffix(sub, parent) { + return false + } + return sub[len(sub)-len(parent)-1] == '.' +} + +func stripPassword(u *url.URL) string { + _, passSet := u.User.Password() + if passSet { + return strings.Replace(u.String(), u.User.String()+"@", u.User.Username()+":***@", 1) + } + return u.String() +} diff --git a/backend/vendor/github.com/enetx/http/clone.go b/backend/vendor/github.com/enetx/http/clone.go new file mode 100644 index 0000000..0c2daf8 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/clone.go @@ -0,0 +1,121 @@ +// Copyright 2019 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http + +import ( + "mime/multipart" + "net/textproto" + "net/url" + _ "unsafe" // for linkname +) + +// cloneURLValues should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/searKing/golang +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname cloneURLValues +func cloneURLValues(v url.Values) url.Values { + if v == nil { + return nil + } + // http.Header and url.Values have the same representation, so temporarily + // treat it like http.Header, which does have a clone: + return url.Values(Header(v).Clone()) +} + +// cloneURL should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/searKing/golang +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname cloneURL +func cloneURL(u *url.URL) *url.URL { + if u == nil { + return nil + } + u2 := new(url.URL) + *u2 = *u + if u.User != nil { + u2.User = new(url.Userinfo) + *u2.User = *u.User + } + return u2 +} + +// cloneMultipartForm should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/searKing/golang +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname cloneMultipartForm +func cloneMultipartForm(f *multipart.Form) *multipart.Form { + if f == nil { + return nil + } + f2 := &multipart.Form{ + Value: (map[string][]string)(Header(f.Value).Clone()), + } + if f.File != nil { + m := make(map[string][]*multipart.FileHeader, len(f.File)) + for k, vv := range f.File { + vv2 := make([]*multipart.FileHeader, len(vv)) + for i, v := range vv { + vv2[i] = cloneMultipartFileHeader(v) + } + m[k] = vv2 + } + f2.File = m + } + return f2 +} + +// cloneMultipartFileHeader should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/searKing/golang +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname cloneMultipartFileHeader +func cloneMultipartFileHeader(fh *multipart.FileHeader) *multipart.FileHeader { + if fh == nil { + return nil + } + fh2 := new(multipart.FileHeader) + *fh2 = *fh + fh2.Header = textproto.MIMEHeader(Header(fh.Header).Clone()) + return fh2 +} + +// cloneOrMakeHeader invokes Header.Clone but if the +// result is nil, it'll instead make and return a non-nil Header. +// +// cloneOrMakeHeader should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/searKing/golang +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname cloneOrMakeHeader +func cloneOrMakeHeader(hdr Header) Header { + clone := hdr.Clone() + if clone == nil { + clone = make(Header) + } + return clone +} diff --git a/backend/vendor/github.com/enetx/http/cookie.go b/backend/vendor/github.com/enetx/http/cookie.go new file mode 100644 index 0000000..2be94d9 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/cookie.go @@ -0,0 +1,529 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http + +import ( + "errors" + "fmt" + "log" + "net" + "net/textproto" + "strconv" + "strings" + "time" + + "github.com/enetx/http/internal/ascii" +) + +// A Cookie represents an HTTP cookie as sent in the Set-Cookie header of an +// HTTP response or the Cookie header of an HTTP request. +// +// See https://tools.ietf.org/html/rfc6265 for details. +type Cookie struct { + Name string + Value string + Quoted bool // indicates whether the Value was originally quoted + + Path string // optional + Domain string // optional + Expires time.Time // optional + RawExpires string // for reading cookies only + + // MaxAge=0 means no 'Max-Age' attribute specified. + // MaxAge<0 means delete cookie now, equivalently 'Max-Age: 0' + // MaxAge>0 means Max-Age attribute present and given in seconds + MaxAge int + Secure bool + HttpOnly bool + SameSite SameSite + Partitioned bool + Raw string + Unparsed []string // Raw text of unparsed attribute-value pairs +} + +// SameSite allows a server to define a cookie attribute making it impossible for +// the browser to send this cookie along with cross-site requests. The main +// goal is to mitigate the risk of cross-origin information leakage, and provide +// some protection against cross-site request forgery attacks. +// +// See https://tools.ietf.org/html/draft-ietf-httpbis-cookie-same-site-00 for details. +type SameSite int + +const ( + SameSiteDefaultMode SameSite = iota + 1 + SameSiteLaxMode + SameSiteStrictMode + SameSiteNoneMode +) + +var ( + errBlankCookie = errors.New("http: blank cookie") + errEqualNotFoundInCookie = errors.New("http: '=' not found in cookie") + errInvalidCookieName = errors.New("http: invalid cookie name") + errInvalidCookieValue = errors.New("http: invalid cookie value") +) + +// ParseCookie parses a Cookie header value and returns all the cookies +// which were set in it. Since the same cookie name can appear multiple times +// the returned Values can contain more than one value for a given key. +func ParseCookie(line string) ([]*Cookie, error) { + parts := strings.Split(textproto.TrimString(line), ";") + if len(parts) == 1 && parts[0] == "" { + return nil, errBlankCookie + } + cookies := make([]*Cookie, 0, len(parts)) + for _, s := range parts { + s = textproto.TrimString(s) + name, value, found := strings.Cut(s, "=") + if !found { + return nil, errEqualNotFoundInCookie + } + if !isToken(name) { + return nil, errInvalidCookieName + } + value, quoted, found := parseCookieValue(value, true) + if !found { + return nil, errInvalidCookieValue + } + cookies = append(cookies, &Cookie{Name: name, Value: value, Quoted: quoted}) + } + return cookies, nil +} + +// ParseSetCookie parses a Set-Cookie header value and returns a cookie. +// It returns an error on syntax error. +func ParseSetCookie(line string) (*Cookie, error) { + parts := strings.Split(textproto.TrimString(line), ";") + if len(parts) == 1 && parts[0] == "" { + return nil, errBlankCookie + } + parts[0] = textproto.TrimString(parts[0]) + name, value, ok := strings.Cut(parts[0], "=") + if !ok { + return nil, errEqualNotFoundInCookie + } + name = textproto.TrimString(name) + if !isToken(name) { + return nil, errInvalidCookieName + } + value, quoted, ok := parseCookieValue(value, true) + if !ok { + return nil, errInvalidCookieValue + } + c := &Cookie{ + Name: name, + Value: value, + Quoted: quoted, + Raw: line, + } + for i := 1; i < len(parts); i++ { + parts[i] = textproto.TrimString(parts[i]) + if len(parts[i]) == 0 { + continue + } + + attr, val, _ := strings.Cut(parts[i], "=") + lowerAttr, isASCII := ascii.ToLower(attr) + if !isASCII { + continue + } + val, _, ok = parseCookieValue(val, false) + if !ok { + c.Unparsed = append(c.Unparsed, parts[i]) + continue + } + + switch lowerAttr { + case "samesite": + lowerVal, ascii := ascii.ToLower(val) + if !ascii { + c.SameSite = SameSiteDefaultMode + continue + } + switch lowerVal { + case "lax": + c.SameSite = SameSiteLaxMode + case "strict": + c.SameSite = SameSiteStrictMode + case "none": + c.SameSite = SameSiteNoneMode + default: + c.SameSite = SameSiteDefaultMode + } + continue + case "secure": + c.Secure = true + continue + case "httponly": + c.HttpOnly = true + continue + case "domain": + c.Domain = val + continue + case "max-age": + secs, err := strconv.Atoi(val) + if err != nil || secs != 0 && val[0] == '0' { + break + } + if secs <= 0 { + secs = -1 + } + c.MaxAge = secs + continue + case "expires": + c.RawExpires = val + exptime, err := time.Parse(time.RFC1123, val) + if err != nil { + exptime, err = time.Parse("Mon, 02-Jan-2006 15:04:05 MST", val) + if err != nil { + c.Expires = time.Time{} + break + } + } + c.Expires = exptime.UTC() + continue + case "path": + c.Path = val + continue + case "partitioned": + c.Partitioned = true + continue + } + c.Unparsed = append(c.Unparsed, parts[i]) + } + return c, nil +} + +// readSetCookies parses all "Set-Cookie" values from +// the header h and returns the successfully parsed Cookies. +func readSetCookies(h Header) []*Cookie { + cookieCount := len(h["Set-Cookie"]) + if cookieCount == 0 { + return []*Cookie{} + } + cookies := make([]*Cookie, 0, cookieCount) + for _, line := range h["Set-Cookie"] { + if cookie, err := ParseSetCookie(line); err == nil { + cookies = append(cookies, cookie) + } + } + return cookies +} + +// SetCookie adds a Set-Cookie header to the provided [ResponseWriter]'s headers. +// The provided cookie must have a valid Name. Invalid cookies may be +// silently dropped. +func SetCookie(w ResponseWriter, cookie *Cookie) { + if v := cookie.String(); v != "" { + w.Header().Add("Set-Cookie", v) + } +} + +// String returns the serialization of the cookie for use in a [Cookie] +// header (if only Name and Value are set) or a Set-Cookie response +// header (if other fields are set). +// If c is nil or c.Name is invalid, the empty string is returned. +func (c *Cookie) String() string { + if c == nil || !isToken(c.Name) { + return "" + } + // extraCookieLength derived from typical length of cookie attributes + // see RFC 6265 Sec 4.1. + const extraCookieLength = 110 + var b strings.Builder + b.Grow(len(c.Name) + len(c.Value) + len(c.Domain) + len(c.Path) + extraCookieLength) + b.WriteString(c.Name) + b.WriteRune('=') + b.WriteString(sanitizeCookieValue(c.Value, c.Quoted)) + + if len(c.Path) > 0 { + b.WriteString("; Path=") + b.WriteString(sanitizeCookiePath(c.Path)) + } + if len(c.Domain) > 0 { + if validCookieDomain(c.Domain) { + // A c.Domain containing illegal characters is not + // sanitized but simply dropped which turns the cookie + // into a host-only cookie. A leading dot is okay + // but won't be sent. + d := c.Domain + if d[0] == '.' { + d = d[1:] + } + b.WriteString("; Domain=") + b.WriteString(d) + } else { + log.Printf("net/http: invalid Cookie.Domain %q; dropping domain attribute", c.Domain) + } + } + var buf [len(TimeFormat)]byte + if validCookieExpires(c.Expires) { + b.WriteString("; Expires=") + b.Write(c.Expires.UTC().AppendFormat(buf[:0], TimeFormat)) + } + if c.MaxAge > 0 { + b.WriteString("; Max-Age=") + b.Write(strconv.AppendInt(buf[:0], int64(c.MaxAge), 10)) + } else if c.MaxAge < 0 { + b.WriteString("; Max-Age=0") + } + if c.HttpOnly { + b.WriteString("; HttpOnly") + } + if c.Secure { + b.WriteString("; Secure") + } + switch c.SameSite { + case SameSiteDefaultMode: + // Skip, default mode is obtained by not emitting the attribute. + case SameSiteNoneMode: + b.WriteString("; SameSite=None") + case SameSiteLaxMode: + b.WriteString("; SameSite=Lax") + case SameSiteStrictMode: + b.WriteString("; SameSite=Strict") + } + if c.Partitioned { + b.WriteString("; Partitioned") + } + return b.String() +} + +// Valid reports whether the cookie is valid. +func (c *Cookie) Valid() error { + if c == nil { + return errors.New("http: nil Cookie") + } + if !isToken(c.Name) { + return errors.New("http: invalid Cookie.Name") + } + if !c.Expires.IsZero() && !validCookieExpires(c.Expires) { + return errors.New("http: invalid Cookie.Expires") + } + for i := 0; i < len(c.Value); i++ { + if !validCookieValueByte(c.Value[i]) { + return fmt.Errorf("http: invalid byte %q in Cookie.Value", c.Value[i]) + } + } + if len(c.Path) > 0 { + for i := 0; i < len(c.Path); i++ { + if !validCookiePathByte(c.Path[i]) { + return fmt.Errorf("http: invalid byte %q in Cookie.Path", c.Path[i]) + } + } + } + if len(c.Domain) > 0 { + if !validCookieDomain(c.Domain) { + return errors.New("http: invalid Cookie.Domain") + } + } + if c.Partitioned { + if !c.Secure { + return errors.New("http: partitioned cookies must be set with Secure") + } + } + return nil +} + +// readCookies parses all "Cookie" values from the header h and +// returns the successfully parsed Cookies. +// +// if filter isn't empty, only cookies of that name are returned. +func readCookies(h Header, filter string) []*Cookie { + lines := h["Cookie"] + if len(lines) == 0 { + return []*Cookie{} + } + + cookies := make([]*Cookie, 0, len(lines)+strings.Count(lines[0], ";")) + for _, line := range lines { + line = textproto.TrimString(line) + + var part string + for len(line) > 0 { // continue since we have rest + part, line, _ = strings.Cut(line, ";") + part = textproto.TrimString(part) + if part == "" { + continue + } + name, val, _ := strings.Cut(part, "=") + name = textproto.TrimString(name) + if !isToken(name) { + continue + } + if filter != "" && filter != name { + continue + } + val, quoted, ok := parseCookieValue(val, true) + if !ok { + continue + } + cookies = append(cookies, &Cookie{Name: name, Value: val, Quoted: quoted}) + } + } + return cookies +} + +// validCookieDomain reports whether v is a valid cookie domain-value. +func validCookieDomain(v string) bool { + if isCookieDomainName(v) { + return true + } + if net.ParseIP(v) != nil && !strings.Contains(v, ":") { + return true + } + return false +} + +// validCookieExpires reports whether v is a valid cookie expires-value. +func validCookieExpires(t time.Time) bool { + // IETF RFC 6265 Section 5.1.1.5, the year must not be less than 1601 + return t.Year() >= 1601 +} + +// isCookieDomainName reports whether s is a valid domain name or a valid +// domain name with a leading dot '.'. It is almost a direct copy of +// package net's isDomainName. +func isCookieDomainName(s string) bool { + if len(s) == 0 { + return false + } + if len(s) > 255 { + return false + } + + if s[0] == '.' { + // A cookie a domain attribute may start with a leading dot. + s = s[1:] + } + last := byte('.') + ok := false // Ok once we've seen a letter. + partlen := 0 + for i := 0; i < len(s); i++ { + c := s[i] + switch { + default: + return false + case 'a' <= c && c <= 'z' || 'A' <= c && c <= 'Z': + // No '_' allowed here (in contrast to package net). + ok = true + partlen++ + case '0' <= c && c <= '9': + // fine + partlen++ + case c == '-': + // Byte before dash cannot be dot. + if last == '.' { + return false + } + partlen++ + case c == '.': + // Byte before dot cannot be dot, dash. + if last == '.' || last == '-' { + return false + } + if partlen > 63 || partlen == 0 { + return false + } + partlen = 0 + } + last = c + } + if last == '-' || partlen > 63 { + return false + } + + return ok +} + +var cookieNameSanitizer = strings.NewReplacer("\n", "-", "\r", "-") + +func sanitizeCookieName(n string) string { + return cookieNameSanitizer.Replace(n) +} + +// sanitizeCookieValue produces a suitable cookie-value from v. +// It receives a quoted bool indicating whether the value was originally +// quoted. +// https://tools.ietf.org/html/rfc6265#section-4.1.1 +// +// cookie-value = *cookie-octet / ( DQUOTE *cookie-octet DQUOTE ) +// cookie-octet = %x21 / %x23-2B / %x2D-3A / %x3C-5B / %x5D-7E +// ; US-ASCII characters excluding CTLs, +// ; whitespace DQUOTE, comma, semicolon, +// ; and backslash +// +// We loosen this as spaces and commas are common in cookie values +// thus we produce a quoted cookie-value if v contains commas or spaces. +// See https://golang.org/issue/7243 for the discussion. +func sanitizeCookieValue(v string, quoted bool) string { + v = sanitizeOrWarn("Cookie.Value", validCookieValueByte, v) + if len(v) == 0 { + return v + } + if strings.ContainsAny(v, " ,") || quoted { + return `"` + v + `"` + } + return v +} + +func validCookieValueByte(b byte) bool { + return 0x20 <= b && b < 0x7f && b != '"' && b != ';' && b != '\\' +} + +// path-av = "Path=" path-value +// path-value = +func sanitizeCookiePath(v string) string { + return sanitizeOrWarn("Cookie.Path", validCookiePathByte, v) +} + +func validCookiePathByte(b byte) bool { + return 0x20 <= b && b < 0x7f && b != ';' +} + +func sanitizeOrWarn(fieldName string, valid func(byte) bool, v string) string { + ok := true + for i := 0; i < len(v); i++ { + if valid(v[i]) { + continue + } + log.Printf("net/http: invalid byte %q in %s; dropping invalid bytes", v[i], fieldName) + ok = false + break + } + if ok { + return v + } + buf := make([]byte, 0, len(v)) + for i := 0; i < len(v); i++ { + if b := v[i]; valid(b) { + buf = append(buf, b) + } + } + return string(buf) +} + +// parseCookieValue parses a cookie value according to RFC 6265. +// If allowDoubleQuote is true, parseCookieValue will consider that it +// is parsing the cookie-value; +// otherwise, it will consider that it is parsing a cookie-av value +// (cookie attribute-value). +// +// It returns the parsed cookie value, a boolean indicating whether the +// parsing was successful, and a boolean indicating whether the parsed +// value was enclosed in double quotes. +func parseCookieValue(raw string, allowDoubleQuote bool) (value string, quoted, ok bool) { + // Strip the quotes, if present. + if allowDoubleQuote && len(raw) > 1 && raw[0] == '"' && raw[len(raw)-1] == '"' { + raw = raw[1 : len(raw)-1] + quoted = true + } + for i := 0; i < len(raw); i++ { + if !validCookieValueByte(raw[i]) { + return "", quoted, false + } + } + return raw, quoted, true +} diff --git a/backend/vendor/github.com/enetx/http/cookiejar/jar.go b/backend/vendor/github.com/enetx/http/cookiejar/jar.go new file mode 100644 index 0000000..8940c85 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/cookiejar/jar.go @@ -0,0 +1,547 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package cookiejar implements an in-memory RFC 6265-compliant http.CookieJar. +package cookiejar + +import ( + "cmp" + "errors" + "fmt" + "net" + "net/url" + "slices" + "strings" + "sync" + "time" + + "github.com/enetx/http" + "github.com/enetx/http/internal/ascii" +) + +// PublicSuffixList provides the public suffix of a domain. For example: +// - the public suffix of "example.com" is "com", +// - the public suffix of "foo1.foo2.foo3.co.uk" is "co.uk", and +// - the public suffix of "bar.pvt.k12.ma.us" is "pvt.k12.ma.us". +// +// Implementations of PublicSuffixList must be safe for concurrent use by +// multiple goroutines. +// +// An implementation that always returns "" is valid and may be useful for +// testing but it is not secure: it means that the HTTP server for foo.com can +// set a cookie for bar.com. +// +// A public suffix list implementation is in the package +// golang.org/x/net/publicsuffix. +type PublicSuffixList interface { + // PublicSuffix returns the public suffix of domain. + // + // TODO: specify which of the caller and callee is responsible for IP + // addresses, for leading and trailing dots, for case sensitivity, and + // for IDN/Punycode. + PublicSuffix(domain string) string + + // String returns a description of the source of this public suffix + // list. The description will typically contain something like a time + // stamp or version number. + String() string +} + +// Options are the options for creating a new Jar. +type Options struct { + // PublicSuffixList is the public suffix list that determines whether + // an HTTP server can set a cookie for a domain. + // + // A nil value is valid and may be useful for testing but it is not + // secure: it means that the HTTP server for foo.co.uk can set a cookie + // for bar.co.uk. + PublicSuffixList PublicSuffixList +} + +// Jar implements the http.CookieJar interface from the net/http package. +type Jar struct { + psList PublicSuffixList + + // mu locks the remaining fields. + mu sync.Mutex + + // entries is a set of entries, keyed by their eTLD+1 and subkeyed by + // their name/domain/path. + entries map[string]map[string]entry + + // nextSeqNum is the next sequence number assigned to a new cookie + // created SetCookies. + nextSeqNum uint64 +} + +// New returns a new cookie jar. A nil [*Options] is equivalent to a zero +// Options. +func New(o *Options) (*Jar, error) { + jar := &Jar{ + entries: make(map[string]map[string]entry), + } + if o != nil { + jar.psList = o.PublicSuffixList + } + return jar, nil +} + +// entry is the internal representation of a cookie. +// +// This struct type is not used outside of this package per se, but the exported +// fields are those of RFC 6265. +type entry struct { + Name string + Value string + Quoted bool + Domain string + Path string + SameSite string + Secure bool + HttpOnly bool + Persistent bool + HostOnly bool + Expires time.Time + Creation time.Time + LastAccess time.Time + + // seqNum is a sequence number so that Cookies returns cookies in a + // deterministic order, even for cookies that have equal Path length and + // equal Creation time. This simplifies testing. + seqNum uint64 +} + +// id returns the domain;path;name triple of e as an id. +func (e *entry) id() string { + return fmt.Sprintf("%s;%s;%s", e.Domain, e.Path, e.Name) +} + +// shouldSend determines whether e's cookie qualifies to be included in a +// request to host/path. It is the caller's responsibility to check if the +// cookie is expired. +func (e *entry) shouldSend(https bool, host, path string) bool { + return e.domainMatch(host) && e.pathMatch(path) && (https || !e.Secure) +} + +// domainMatch checks whether e's Domain allows sending e back to host. +// It differs from "domain-match" of RFC 6265 section 5.1.3 because we treat +// a cookie with an IP address in the Domain always as a host cookie. +func (e *entry) domainMatch(host string) bool { + if e.Domain == host { + return true + } + return !e.HostOnly && hasDotSuffix(host, e.Domain) +} + +// pathMatch implements "path-match" according to RFC 6265 section 5.1.4. +func (e *entry) pathMatch(requestPath string) bool { + if requestPath == e.Path { + return true + } + if strings.HasPrefix(requestPath, e.Path) { + if e.Path[len(e.Path)-1] == '/' { + return true // The "/any/" matches "/any/path" case. + } else if requestPath[len(e.Path)] == '/' { + return true // The "/any" matches "/any/path" case. + } + } + return false +} + +// hasDotSuffix reports whether s ends in "."+suffix. +func hasDotSuffix(s, suffix string) bool { + return len(s) > len(suffix) && s[len(s)-len(suffix)-1] == '.' && s[len(s)-len(suffix):] == suffix +} + +// Cookies implements the Cookies method of the [http.CookieJar] interface. +// +// It returns an empty slice if the URL's scheme is not HTTP or HTTPS. +func (j *Jar) Cookies(u *url.URL) (cookies []*http.Cookie) { + return j.cookies(u, time.Now()) +} + +// cookies is like Cookies but takes the current time as a parameter. +func (j *Jar) cookies(u *url.URL, now time.Time) (cookies []*http.Cookie) { + if u.Scheme != "http" && u.Scheme != "https" { + return cookies + } + host, err := canonicalHost(u.Host) + if err != nil { + return cookies + } + key := jarKey(host, j.psList) + + j.mu.Lock() + defer j.mu.Unlock() + + submap := j.entries[key] + if submap == nil { + return cookies + } + + https := u.Scheme == "https" + path := u.Path + if path == "" { + path = "/" + } + + modified := false + var selected []entry + for id, e := range submap { + if e.Persistent && !e.Expires.After(now) { + delete(submap, id) + modified = true + continue + } + if !e.shouldSend(https, host, path) { + continue + } + e.LastAccess = now + submap[id] = e + selected = append(selected, e) + modified = true + } + if modified { + if len(submap) == 0 { + delete(j.entries, key) + } else { + j.entries[key] = submap + } + } + + // sort according to RFC 6265 section 5.4 point 2: by longest + // path and then by earliest creation time. + slices.SortFunc(selected, func(a, b entry) int { + if r := cmp.Compare(b.Path, a.Path); r != 0 { + return r + } + if r := a.Creation.Compare(b.Creation); r != 0 { + return r + } + return cmp.Compare(a.seqNum, b.seqNum) + }) + for _, e := range selected { + cookies = append(cookies, &http.Cookie{Name: e.Name, Value: e.Value, Quoted: e.Quoted}) + } + + return cookies +} + +// SetCookies implements the SetCookies method of the [http.CookieJar] interface. +// +// It does nothing if the URL's scheme is not HTTP or HTTPS. +func (j *Jar) SetCookies(u *url.URL, cookies []*http.Cookie) { + j.setCookies(u, cookies, time.Now()) +} + +// setCookies is like SetCookies but takes the current time as parameter. +func (j *Jar) setCookies(u *url.URL, cookies []*http.Cookie, now time.Time) { + if len(cookies) == 0 { + return + } + if u.Scheme != "http" && u.Scheme != "https" { + return + } + host, err := canonicalHost(u.Host) + if err != nil { + return + } + key := jarKey(host, j.psList) + defPath := defaultPath(u.Path) + + j.mu.Lock() + defer j.mu.Unlock() + + submap := j.entries[key] + + modified := false + for _, cookie := range cookies { + e, remove, err := j.newEntry(cookie, now, defPath, host) + if err != nil { + continue + } + id := e.id() + if remove { + if submap != nil { + if _, ok := submap[id]; ok { + delete(submap, id) + modified = true + } + } + continue + } + if submap == nil { + submap = make(map[string]entry) + } + + if old, ok := submap[id]; ok { + e.Creation = old.Creation + e.seqNum = old.seqNum + } else { + e.Creation = now + e.seqNum = j.nextSeqNum + j.nextSeqNum++ + } + e.LastAccess = now + submap[id] = e + modified = true + } + + if modified { + if len(submap) == 0 { + delete(j.entries, key) + } else { + j.entries[key] = submap + } + } +} + +// canonicalHost strips port from host if present and returns the canonicalized +// host name. +func canonicalHost(host string) (string, error) { + var err error + if hasPort(host) { + host, _, err = net.SplitHostPort(host) + if err != nil { + return "", err + } + } + // Strip trailing dot from fully qualified domain names. + host = strings.TrimSuffix(host, ".") + encoded, err := toASCII(host) + if err != nil { + return "", err + } + // We know this is ascii, no need to check. + lower, _ := ascii.ToLower(encoded) + return lower, nil +} + +// hasPort reports whether host contains a port number. host may be a host +// name, an IPv4 or an IPv6 address. +func hasPort(host string) bool { + colons := strings.Count(host, ":") + if colons == 0 { + return false + } + if colons == 1 { + return true + } + return host[0] == '[' && strings.Contains(host, "]:") +} + +// jarKey returns the key to use for a jar. +func jarKey(host string, psl PublicSuffixList) string { + if isIP(host) { + return host + } + + var i int + if psl == nil { + i = strings.LastIndex(host, ".") + if i <= 0 { + return host + } + } else { + suffix := psl.PublicSuffix(host) + if suffix == host { + return host + } + i = len(host) - len(suffix) + if i <= 0 || host[i-1] != '.' { + // The provided public suffix list psl is broken. + // Storing cookies under host is a safe stopgap. + return host + } + // Only len(suffix) is used to determine the jar key from + // here on, so it is okay if psl.PublicSuffix("www.buggy.psl") + // returns "com" as the jar key is generated from host. + } + prevDot := strings.LastIndex(host[:i-1], ".") + return host[prevDot+1:] +} + +// isIP reports whether host is an IP address. +func isIP(host string) bool { + if strings.ContainsAny(host, ":%") { + // Probable IPv6 address. + // Hostnames can't contain : or %, so this is definitely not a valid host. + // Treating it as an IP is the more conservative option, and avoids the risk + // of interpreting ::1%.www.example.com as a subdomain of www.example.com. + return true + } + return net.ParseIP(host) != nil +} + +// defaultPath returns the directory part of a URL's path according to +// RFC 6265 section 5.1.4. +func defaultPath(path string) string { + if len(path) == 0 || path[0] != '/' { + return "/" // Path is empty or malformed. + } + + i := strings.LastIndex(path, "/") // Path starts with "/", so i != -1. + if i == 0 { + return "/" // Path has the form "/abc". + } + return path[:i] // Path is either of form "/abc/xyz" or "/abc/xyz/". +} + +// newEntry creates an entry from an http.Cookie c. now is the current time and +// is compared to c.Expires to determine deletion of c. defPath and host are the +// default-path and the canonical host name of the URL c was received from. +// +// remove records whether the jar should delete this cookie, as it has already +// expired with respect to now. In this case, e may be incomplete, but it will +// be valid to call e.id (which depends on e's Name, Domain and Path). +// +// A malformed c.Domain will result in an error. +func (j *Jar) newEntry(c *http.Cookie, now time.Time, defPath, host string) (e entry, remove bool, err error) { + e.Name = c.Name + + if c.Path == "" || c.Path[0] != '/' { + e.Path = defPath + } else { + e.Path = c.Path + } + + e.Domain, e.HostOnly, err = j.domainAndType(host, c.Domain) + if err != nil { + return e, false, err + } + + // MaxAge takes precedence over Expires. + if c.MaxAge < 0 { + return e, true, nil + } else if c.MaxAge > 0 { + e.Expires = now.Add(time.Duration(c.MaxAge) * time.Second) + e.Persistent = true + } else { + if c.Expires.IsZero() { + e.Expires = endOfTime + e.Persistent = false + } else { + if !c.Expires.After(now) { + return e, true, nil + } + e.Expires = c.Expires + e.Persistent = true + } + } + + e.Value = c.Value + e.Quoted = c.Quoted + e.Secure = c.Secure + e.HttpOnly = c.HttpOnly + + switch c.SameSite { + case http.SameSiteDefaultMode: + e.SameSite = "SameSite" + case http.SameSiteStrictMode: + e.SameSite = "SameSite=Strict" + case http.SameSiteLaxMode: + e.SameSite = "SameSite=Lax" + } + + return e, false, nil +} + +var ( + errIllegalDomain = errors.New("cookiejar: illegal cookie domain attribute") + errMalformedDomain = errors.New("cookiejar: malformed cookie domain attribute") +) + +// endOfTime is the time when session (non-persistent) cookies expire. +// This instant is representable in most date/time formats (not just +// Go's time.Time) and should be far enough in the future. +var endOfTime = time.Date(9999, 12, 31, 23, 59, 59, 0, time.UTC) + +// domainAndType determines the cookie's domain and hostOnly attribute. +func (j *Jar) domainAndType(host, domain string) (string, bool, error) { + if domain == "" { + // No domain attribute in the SetCookie header indicates a + // host cookie. + return host, true, nil + } + + if isIP(host) { + // RFC 6265 is not super clear here, a sensible interpretation + // is that cookies with an IP address in the domain-attribute + // are allowed. + + // RFC 6265 section 5.2.3 mandates to strip an optional leading + // dot in the domain-attribute before processing the cookie. + // + // Most browsers don't do that for IP addresses, only curl + // (version 7.54) and IE (version 11) do not reject a + // Set-Cookie: a=1; domain=.127.0.0.1 + // This leading dot is optional and serves only as hint for + // humans to indicate that a cookie with "domain=.bbc.co.uk" + // would be sent to every subdomain of bbc.co.uk. + // It just doesn't make sense on IP addresses. + // The other processing and validation steps in RFC 6265 just + // collapse to: + if host != domain { + return "", false, errIllegalDomain + } + + // According to RFC 6265 such cookies should be treated as + // domain cookies. + // As there are no subdomains of an IP address the treatment + // according to RFC 6265 would be exactly the same as that of + // a host-only cookie. Contemporary browsers (and curl) do + // allows such cookies but treat them as host-only cookies. + // So do we as it just doesn't make sense to label them as + // domain cookies when there is no domain; the whole notion of + // domain cookies requires a domain name to be well defined. + return host, true, nil + } + + // From here on: If the cookie is valid, it is a domain cookie (with + // the one exception of a public suffix below). + // See RFC 6265 section 5.2.3. + domain = strings.TrimPrefix(domain, ".") + + if len(domain) == 0 || domain[0] == '.' { + // Received either "Domain=." or "Domain=..some.thing", + // both are illegal. + return "", false, errMalformedDomain + } + + domain, isASCII := ascii.ToLower(domain) + if !isASCII { + // Received non-ASCII domain, e.g. "perché.com" instead of "xn--perch-fsa.com" + return "", false, errMalformedDomain + } + + if domain[len(domain)-1] == '.' { + // We received stuff like "Domain=www.example.com.". + // Browsers do handle such stuff (actually differently) but + // RFC 6265 seems to be clear here (e.g. section 4.1.2.3) in + // requiring a reject. 4.1.2.3 is not normative, but + // "Domain Matching" (5.1.3) and "Canonicalized Host Names" + // (5.1.2) are. + return "", false, errMalformedDomain + } + + // See RFC 6265 section 5.3 #5. + if j.psList != nil { + if ps := j.psList.PublicSuffix(domain); ps != "" && !hasDotSuffix(domain, ps) { + if host == domain { + // This is the one exception in which a cookie + // with a domain attribute is a host cookie. + return host, true, nil + } + return "", false, errIllegalDomain + } + } + + // The domain must domain-match host: www.mycompany.com cannot + // set cookies for .ourcompetitors.com. + if host != domain && !hasDotSuffix(host, domain) { + return "", false, errIllegalDomain + } + + return domain, false, nil +} diff --git a/backend/vendor/github.com/enetx/http/cookiejar/punycode.go b/backend/vendor/github.com/enetx/http/cookiejar/punycode.go new file mode 100644 index 0000000..d2e336f --- /dev/null +++ b/backend/vendor/github.com/enetx/http/cookiejar/punycode.go @@ -0,0 +1,152 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package cookiejar + +// This file implements the Punycode algorithm from RFC 3492. + +import ( + "fmt" + "strings" + "unicode/utf8" + + "github.com/enetx/http/internal/ascii" +) + +// These parameter values are specified in section 5. +// +// All computation is done with int32s, so that overflow behavior is identical +// regardless of whether int is 32-bit or 64-bit. +const ( + base int32 = 36 + damp int32 = 700 + initialBias int32 = 72 + initialN int32 = 128 + skew int32 = 38 + tmax int32 = 26 + tmin int32 = 1 +) + +// encode encodes a string as specified in section 6.3 and prepends prefix to +// the result. +// +// The "while h < length(input)" line in the specification becomes "for +// remaining != 0" in the Go code, because len(s) in Go is in bytes, not runes. +func encode(prefix, s string) (string, error) { + output := make([]byte, len(prefix), len(prefix)+1+2*len(s)) + copy(output, prefix) + delta, n, bias := int32(0), initialN, initialBias + b, remaining := int32(0), int32(0) + for _, r := range s { + if r < utf8.RuneSelf { + b++ + output = append(output, byte(r)) + } else { + remaining++ + } + } + h := b + if b > 0 { + output = append(output, '-') + } + for remaining != 0 { + m := int32(0x7fffffff) + for _, r := range s { + if m > r && r >= n { + m = r + } + } + delta += (m - n) * (h + 1) + if delta < 0 { + return "", fmt.Errorf("cookiejar: invalid label %q", s) + } + n = m + for _, r := range s { + if r < n { + delta++ + if delta < 0 { + return "", fmt.Errorf("cookiejar: invalid label %q", s) + } + continue + } + if r > n { + continue + } + q := delta + for k := base; ; k += base { + t := k - bias + if t < tmin { + t = tmin + } else if t > tmax { + t = tmax + } + if q < t { + break + } + output = append(output, encodeDigit(t+(q-t)%(base-t))) + q = (q - t) / (base - t) + } + output = append(output, encodeDigit(q)) + bias = adapt(delta, h+1, h == b) + delta = 0 + h++ + remaining-- + } + delta++ + n++ + } + return string(output), nil +} + +func encodeDigit(digit int32) byte { + switch { + case 0 <= digit && digit < 26: + return byte(digit + 'a') + case 26 <= digit && digit < 36: + return byte(digit + ('0' - 26)) + } + panic("cookiejar: internal error in punycode encoding") +} + +// adapt is the bias adaptation function specified in section 6.1. +func adapt(delta, numPoints int32, firstTime bool) int32 { + if firstTime { + delta /= damp + } else { + delta /= 2 + } + delta += delta / numPoints + k := int32(0) + for delta > ((base-tmin)*tmax)/2 { + delta /= base - tmin + k += base + } + return k + (base-tmin+1)*delta/(delta+skew) +} + +// Strictly speaking, the remaining code below deals with IDNA (RFC 5890 and +// friends) and not Punycode (RFC 3492) per se. + +// acePrefix is the ASCII Compatible Encoding prefix. +const acePrefix = "xn--" + +// toASCII converts a domain or domain label to its ASCII form. For example, +// toASCII("bücher.example.com") is "xn--bcher-kva.example.com", and +// toASCII("golang") is "golang". +func toASCII(s string) (string, error) { + if ascii.Is(s) { + return s, nil + } + labels := strings.Split(s, ".") + for i, label := range labels { + if !ascii.Is(label) { + a, err := encode(acePrefix, label) + if err != nil { + return "", err + } + labels[i] = a + } + } + return strings.Join(labels, "."), nil +} diff --git a/backend/vendor/github.com/enetx/http/csrf.go b/backend/vendor/github.com/enetx/http/csrf.go new file mode 100644 index 0000000..d088b9b --- /dev/null +++ b/backend/vendor/github.com/enetx/http/csrf.go @@ -0,0 +1,214 @@ +// Copyright 2025 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http + +import ( + "errors" + "fmt" + "net/url" + "sync" + "sync/atomic" +) + +// CrossOriginProtection implements protections against [Cross-Site Request +// Forgery (CSRF)] by rejecting non-safe cross-origin browser requests. +// +// Cross-origin requests are currently detected with the [Sec-Fetch-Site] +// header, available in all browsers since 2023, or by comparing the hostname of +// the [Origin] header with the Host header. +// +// The GET, HEAD, and OPTIONS methods are [safe methods] and are always allowed. +// It's important that applications do not perform any state changing actions +// due to requests with safe methods. +// +// Requests without Sec-Fetch-Site or Origin headers are currently assumed to be +// either same-origin or non-browser requests, and are allowed. +// +// The zero value of CrossOriginProtection is valid and has no trusted origins +// or bypass patterns. +// +// [Sec-Fetch-Site]: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Sec-Fetch-Site +// [Origin]: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Origin +// [Cross-Site Request Forgery (CSRF)]: https://developer.mozilla.org/en-US/docs/Web/Security/Attacks/CSRF +// [safe methods]: https://developer.mozilla.org/en-US/docs/Glossary/Safe/HTTP +type CrossOriginProtection struct { + bypass atomic.Pointer[ServeMux] + trustedMu sync.RWMutex + trusted map[string]bool + deny atomic.Pointer[Handler] +} + +// NewCrossOriginProtection returns a new [CrossOriginProtection] value. +func NewCrossOriginProtection() *CrossOriginProtection { + return &CrossOriginProtection{} +} + +// AddTrustedOrigin allows all requests with an [Origin] header +// which exactly matches the given value. +// +// Origin header values are of the form "scheme://host[:port]". +// +// AddTrustedOrigin can be called concurrently with other methods +// or request handling, and applies to future requests. +// +// [Origin]: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Origin +func (c *CrossOriginProtection) AddTrustedOrigin(origin string) error { + u, err := url.Parse(origin) + if err != nil { + return fmt.Errorf("invalid origin %q: %w", origin, err) + } + if u.Scheme == "" { + return fmt.Errorf("invalid origin %q: scheme is required", origin) + } + if u.Host == "" { + return fmt.Errorf("invalid origin %q: host is required", origin) + } + if u.Path != "" || u.RawQuery != "" || u.Fragment != "" { + return fmt.Errorf("invalid origin %q: path, query, and fragment are not allowed", origin) + } + c.trustedMu.Lock() + defer c.trustedMu.Unlock() + if c.trusted == nil { + c.trusted = make(map[string]bool) + } + c.trusted[origin] = true + return nil +} + +type noopHandler struct{} + +func (noopHandler) ServeHTTP(ResponseWriter, *Request) {} + +var sentinelHandler Handler = &noopHandler{} + +// AddInsecureBypassPattern permits all requests that match the given pattern. +// +// The pattern syntax and precedence rules are the same as [ServeMux]. Only +// requests that match the pattern directly are permitted. Those that ServeMux +// would redirect to a pattern (e.g. after cleaning the path or adding a +// trailing slash) are not. +// +// AddInsecureBypassPattern can be called concurrently with other methods or +// request handling, and applies to future requests. +func (c *CrossOriginProtection) AddInsecureBypassPattern(pattern string) { + var bypass *ServeMux + + // Lazily initialize c.bypass + for { + bypass = c.bypass.Load() + if bypass != nil { + break + } + bypass = NewServeMux() + if c.bypass.CompareAndSwap(nil, bypass) { + break + } + } + + bypass.Handle(pattern, sentinelHandler) +} + +// SetDenyHandler sets a handler to invoke when a request is rejected. +// The default error handler responds with a 403 Forbidden status. +// +// SetDenyHandler can be called concurrently with other methods +// or request handling, and applies to future requests. +// +// Check does not call the error handler. +func (c *CrossOriginProtection) SetDenyHandler(h Handler) { + if h == nil { + c.deny.Store(nil) + return + } + c.deny.Store(&h) +} + +// Check applies cross-origin checks to a request. +// It returns an error if the request should be rejected. +func (c *CrossOriginProtection) Check(req *Request) error { + switch req.Method { + case "GET", "HEAD", "OPTIONS": + // Safe methods are always allowed. + return nil + } + + switch req.Header.Get("Sec-Fetch-Site") { + case "": + // No Sec-Fetch-Site header is present. + // Fallthrough to check the Origin header. + case "same-origin", "none": + return nil + default: + if c.isRequestExempt(req) { + return nil + } + return errCrossOriginRequest + } + + origin := req.Header.Get("Origin") + if origin == "" { + // Neither Sec-Fetch-Site nor Origin headers are present. + // Either the request is same-origin or not a browser request. + return nil + } + + if o, err := url.Parse(origin); err == nil && o.Host == req.Host { + // The Origin header matches the Host header. Note that the Host header + // doesn't include the scheme, so we don't know if this might be an + // HTTP→HTTPS cross-origin request. We fail open, since all modern + // browsers support Sec-Fetch-Site since 2023, and running an older + // browser makes a clear security trade-off already. Sites can mitigate + // this with HTTP Strict Transport Security (HSTS). + return nil + } + + if c.isRequestExempt(req) { + return nil + } + return errCrossOriginRequestFromOldBrowser +} + +var ( + errCrossOriginRequest = errors.New("cross-origin request detected from Sec-Fetch-Site header") + errCrossOriginRequestFromOldBrowser = errors.New("cross-origin request detected, and/or browser is out of date: " + + "Sec-Fetch-Site is missing, and Origin does not match Host") +) + +// isRequestExempt checks the bypasses which require taking a lock, and should +// be deferred until the last moment. +func (c *CrossOriginProtection) isRequestExempt(req *Request) bool { + if bypass := c.bypass.Load(); bypass != nil { + if h, _ := bypass.Handler(req); h == sentinelHandler { + // The request matches a bypass pattern. + return true + } + } + + c.trustedMu.RLock() + defer c.trustedMu.RUnlock() + origin := req.Header.Get("Origin") + // The request matches a trusted origin. + return origin != "" && c.trusted[origin] +} + +// Handler returns a handler that applies cross-origin checks +// before invoking the handler h. +// +// If a request fails cross-origin checks, the request is rejected +// with a 403 Forbidden status or handled with the handler passed +// to [CrossOriginProtection.SetDenyHandler]. +func (c *CrossOriginProtection) Handler(h Handler) Handler { + return HandlerFunc(func(w ResponseWriter, r *Request) { + if err := c.Check(r); err != nil { + if deny := c.deny.Load(); deny != nil { + (*deny).ServeHTTP(w, r) + return + } + Error(w, err.Error(), StatusForbidden) + return + } + h.ServeHTTP(w, r) + }) +} diff --git a/backend/vendor/github.com/enetx/http/doc.go b/backend/vendor/github.com/enetx/http/doc.go new file mode 100644 index 0000000..f7ad3ae --- /dev/null +++ b/backend/vendor/github.com/enetx/http/doc.go @@ -0,0 +1,110 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +/* +Package http provides HTTP client and server implementations. + +[Get], [Head], [Post], and [PostForm] make HTTP (or HTTPS) requests: + + resp, err := http.Get("http://example.com/") + ... + resp, err := http.Post("http://example.com/upload", "image/jpeg", &buf) + ... + resp, err := http.PostForm("http://example.com/form", + url.Values{"key": {"Value"}, "id": {"123"}}) + +The caller must close the response body when finished with it: + + resp, err := http.Get("http://example.com/") + if err != nil { + // handle error + } + defer resp.Body.Close() + body, err := io.ReadAll(resp.Body) + // ... + +# Clients and Transports + +For control over HTTP client headers, redirect policy, and other +settings, create a [Client]: + + client := &http.Client{ + CheckRedirect: redirectPolicyFunc, + } + + resp, err := client.Get("http://example.com") + // ... + + req, err := http.NewRequest("GET", "http://example.com", nil) + // ... + req.Header.Add("If-None-Match", `W/"wyzzy"`) + resp, err := client.Do(req) + // ... + +For control over proxies, TLS configuration, keep-alives, +compression, and other settings, create a [Transport]: + + tr := &http.Transport{ + MaxIdleConns: 10, + IdleConnTimeout: 30 * time.Second, + DisableCompression: true, + } + client := &http.Client{Transport: tr} + resp, err := client.Get("https://example.com") + +Clients and Transports are safe for concurrent use by multiple +goroutines and for efficiency should only be created once and re-used. + +# Servers + +ListenAndServe starts an HTTP server with a given address and handler. +The handler is usually nil, which means to use [DefaultServeMux]. +[Handle] and [HandleFunc] add handlers to [DefaultServeMux]: + + http.Handle("/foo", fooHandler) + + http.HandleFunc("/bar", func(w http.ResponseWriter, r *http.Request) { + fmt.Fprintf(w, "Hello, %q", html.EscapeString(r.URL.Path)) + }) + + log.Fatal(http.ListenAndServe(":8080", nil)) + +More control over the server's behavior is available by creating a +custom Server: + + s := &http.Server{ + Addr: ":8080", + Handler: myHandler, + ReadTimeout: 10 * time.Second, + WriteTimeout: 10 * time.Second, + MaxHeaderBytes: 1 << 20, + } + log.Fatal(s.ListenAndServe()) + +# HTTP/2 + +Starting with Go 1.6, the http package has transparent support for the +HTTP/2 protocol when using HTTPS. Programs that must disable HTTP/2 +can do so by setting [Transport.TLSNextProto] (for clients) or +[Server.TLSNextProto] (for servers) to a non-nil, empty +map. Alternatively, the following GODEBUG settings are +currently supported: + + GODEBUG=http2client=0 # disable HTTP/2 client support + GODEBUG=http2server=0 # disable HTTP/2 server support + GODEBUG=http2debug=1 # enable verbose HTTP/2 debug logs + GODEBUG=http2debug=2 # ... even more verbose, with frame dumps + +Please report any issues before disabling HTTP/2 support: https://golang.org/s/http2bug + +The http package's [Transport] and [Server] both automatically enable +HTTP/2 support for simple configurations. To enable HTTP/2 for more +complex configurations, to use lower-level HTTP/2 features, or to use +a newer version of Go's http2 package, import "golang.org/x/net/http2" +directly and use its ConfigureTransport and/or ConfigureServer +functions. Manually configuring HTTP/2 via the golang.org/x/net/http2 +package takes precedence over the net/http package's built-in HTTP/2 +support. +*/ +package http diff --git a/backend/vendor/github.com/enetx/http/filetransport.go b/backend/vendor/github.com/enetx/http/filetransport.go new file mode 100644 index 0000000..b08bae6 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/filetransport.go @@ -0,0 +1,142 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http + +import ( + "fmt" + "io" + "io/fs" +) + +// fileTransport implements RoundTripper for the 'file' protocol. +type fileTransport struct { + fh fileHandler +} + +// NewFileTransport returns a new [RoundTripper], serving the provided +// [FileSystem]. The returned RoundTripper ignores the URL host in its +// incoming requests, as well as most other properties of the +// request. +// +// The typical use case for NewFileTransport is to register the "file" +// protocol with a [Transport], as in: +// +// t := &http.Transport{} +// t.RegisterProtocol("file", http.NewFileTransport(http.Dir("/"))) +// c := &http.Client{Transport: t} +// res, err := c.Get("file:///etc/passwd") +// ... +func NewFileTransport(fs FileSystem) RoundTripper { + return fileTransport{fileHandler{fs}} +} + +// NewFileTransportFS returns a new [RoundTripper], serving the provided +// file system fsys. The returned RoundTripper ignores the URL host in its +// incoming requests, as well as most other properties of the +// request. The files provided by fsys must implement [io.Seeker]. +// +// The typical use case for NewFileTransportFS is to register the "file" +// protocol with a [Transport], as in: +// +// fsys := os.DirFS("/") +// t := &http.Transport{} +// t.RegisterProtocol("file", http.NewFileTransportFS(fsys)) +// c := &http.Client{Transport: t} +// res, err := c.Get("file:///etc/passwd") +// ... +func NewFileTransportFS(fsys fs.FS) RoundTripper { + return NewFileTransport(FS(fsys)) +} + +func (t fileTransport) RoundTrip(req *Request) (resp *Response, err error) { + // We start ServeHTTP in a goroutine, which may take a long + // time if the file is large. The newPopulateResponseWriter + // call returns a channel which either ServeHTTP or finish() + // sends our *Response on, once the *Response itself has been + // populated (even if the body itself is still being + // written to the res.Body, a pipe) + rw, resc := newPopulateResponseWriter() + go func() { + t.fh.ServeHTTP(rw, req) + rw.finish() + }() + return <-resc, nil +} + +func newPopulateResponseWriter() (*populateResponse, <-chan *Response) { + pr, pw := io.Pipe() + rw := &populateResponse{ + ch: make(chan *Response), + pw: pw, + res: &Response{ + Proto: "HTTP/1.0", + ProtoMajor: 1, + Header: make(Header), + Close: true, + Body: pr, + }, + } + return rw, rw.ch +} + +// populateResponse is a ResponseWriter that populates the *Response +// in res, and writes its body to a pipe connected to the response +// body. Once writes begin or finish() is called, the response is sent +// on ch. +type populateResponse struct { + res *Response + ch chan *Response + wroteHeader bool + hasContent bool + sentResponse bool + pw *io.PipeWriter +} + +func (pr *populateResponse) finish() { + if !pr.wroteHeader { + pr.WriteHeader(500) + } + if !pr.sentResponse { + pr.sendResponse() + } + pr.pw.Close() +} + +func (pr *populateResponse) sendResponse() { + if pr.sentResponse { + return + } + pr.sentResponse = true + + if pr.hasContent { + pr.res.ContentLength = -1 + } + pr.ch <- pr.res +} + +func (pr *populateResponse) Header() Header { + return pr.res.Header +} + +func (pr *populateResponse) WriteHeader(code int) { + if pr.wroteHeader { + return + } + pr.wroteHeader = true + + pr.res.StatusCode = code + pr.res.Status = fmt.Sprintf("%d %s", code, StatusText(code)) +} + +func (pr *populateResponse) Write(p []byte) (n int, err error) { + if !pr.wroteHeader { + pr.WriteHeader(StatusOK) + } + pr.hasContent = true + if !pr.sentResponse { + pr.sendResponse() + } + return pr.pw.Write(p) +} diff --git a/backend/vendor/github.com/enetx/http/fs.go b/backend/vendor/github.com/enetx/http/fs.go new file mode 100644 index 0000000..63d57d4 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/fs.go @@ -0,0 +1,1115 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// HTTP file system request handler + +package http + +import ( + "errors" + "fmt" + "io" + "io/fs" + "mime" + "mime/multipart" + "net/textproto" + "net/url" + "os" + "path" + "path/filepath" + "sort" + "strconv" + "strings" + "time" +) + +// A Dir implements [FileSystem] using the native file system restricted to a +// specific directory tree. +// +// While the [FileSystem.Open] method takes '/'-separated paths, a Dir's string +// value is a directory path on the native file system, not a URL, so it is separated +// by [filepath.Separator], which isn't necessarily '/'. +// +// Note that Dir could expose sensitive files and directories. Dir will follow +// symlinks pointing out of the directory tree, which can be especially dangerous +// if serving from a directory in which users are able to create arbitrary symlinks. +// Dir will also allow access to files and directories starting with a period, +// which could expose sensitive directories like .git or sensitive files like +// .htpasswd. To exclude files with a leading period, remove the files/directories +// from the server or create a custom FileSystem implementation. +// +// An empty Dir is treated as ".". +type Dir string + +// mapOpenError maps the provided non-nil error from opening name +// to a possibly better non-nil error. In particular, it turns OS-specific errors +// about opening files in non-directories into fs.ErrNotExist. See Issues 18984 and 49552. +func mapOpenError(originalErr error, name string, sep rune, stat func(string) (fs.FileInfo, error)) error { + if errors.Is(originalErr, fs.ErrNotExist) || errors.Is(originalErr, fs.ErrPermission) { + return originalErr + } + + parts := strings.Split(name, string(sep)) + for i := range parts { + if parts[i] == "" { + continue + } + fi, err := stat(strings.Join(parts[:i+1], string(sep))) + if err != nil { + return originalErr + } + if !fi.IsDir() { + return fs.ErrNotExist + } + } + return originalErr +} + +// errInvalidUnsafePath is returned by Dir.Open when the call to +// filepath.Localize fails. filepath.Localize returns an error if the path +// cannot be represented by the operating system. +var errInvalidUnsafePath = errors.New("http: invalid or unsafe file path") + +// Open implements [FileSystem] using [os.Open], opening files for reading rooted +// and relative to the directory d. +func (d Dir) Open(name string) (File, error) { + path := path.Clean("/" + name)[1:] + if path == "" { + path = "." + } + path, err := filepath.Localize(path) + if err != nil { + return nil, errInvalidUnsafePath + } + dir := string(d) + if dir == "" { + dir = "." + } + fullName := filepath.Join(dir, path) + f, err := os.Open(fullName) + if err != nil { + return nil, mapOpenError(err, fullName, filepath.Separator, os.Stat) + } + return f, nil +} + +// A FileSystem implements access to a collection of named files. +// The elements in a file path are separated by slash ('/', U+002F) +// characters, regardless of host operating system convention. +// See the [FileServer] function to convert a FileSystem to a [Handler]. +// +// This interface predates the [fs.FS] interface, which can be used instead: +// the [FS] adapter function converts an fs.FS to a FileSystem. +type FileSystem interface { + Open(name string) (File, error) +} + +// A File is returned by a [FileSystem]'s Open method and can be +// served by the [FileServer] implementation. +// +// The methods should behave the same as those on an [*os.File]. +type File interface { + io.Closer + io.Reader + io.Seeker + Readdir(count int) ([]fs.FileInfo, error) + Stat() (fs.FileInfo, error) +} + +type anyDirs interface { + len() int + name(i int) string + isDir(i int) bool +} + +type fileInfoDirs []fs.FileInfo + +func (d fileInfoDirs) len() int { return len(d) } +func (d fileInfoDirs) isDir(i int) bool { return d[i].IsDir() } +func (d fileInfoDirs) name(i int) string { return d[i].Name() } + +type dirEntryDirs []fs.DirEntry + +func (d dirEntryDirs) len() int { return len(d) } +func (d dirEntryDirs) isDir(i int) bool { return d[i].IsDir() } +func (d dirEntryDirs) name(i int) string { return d[i].Name() } + +func dirList(w ResponseWriter, r *Request, f File) { + // Prefer to use ReadDir instead of Readdir, + // because the former doesn't require calling + // Stat on every entry of a directory on Unix. + var dirs anyDirs + var err error + if d, ok := f.(fs.ReadDirFile); ok { + var list dirEntryDirs + list, err = d.ReadDir(-1) + dirs = list + } else { + var list fileInfoDirs + list, err = f.Readdir(-1) + dirs = list + } + + if err != nil { + logf(r, "http: error reading directory: %v", err) + Error(w, "Error reading directory", StatusInternalServerError) + return + } + sort.Slice(dirs, func(i, j int) bool { return dirs.name(i) < dirs.name(j) }) + + w.Header().Set("Content-Type", "text/html; charset=utf-8") + fmt.Fprintf(w, "\n") + fmt.Fprintf(w, "\n") + fmt.Fprintf(w, "
\n")
+	for i, n := 0, dirs.len(); i < n; i++ {
+		name := dirs.name(i)
+		if dirs.isDir(i) {
+			name += "/"
+		}
+		// name may contain '?' or '#', which must be escaped to remain
+		// part of the URL path, and not indicate the start of a query
+		// string or fragment.
+		url := url.URL{Path: name}
+		fmt.Fprintf(w, "%s\n", url.String(), htmlReplacer.Replace(name))
+	}
+	fmt.Fprintf(w, "
\n") +} + +// GODEBUG=httpservecontentkeepheaders=1 restores the pre-1.23 behavior of not deleting +// Cache-Control, Content-Encoding, Etag, or Last-Modified headers on ServeContent errors. +// var httpservecontentkeepheaders = godebug.New("httpservecontentkeepheaders") + +// serveError serves an error from ServeFile, ServeFileFS, and ServeContent. +// Because those can all be configured by the caller by setting headers like +// Etag, Last-Modified, and Cache-Control to send on a successful response, +// the error path needs to clear them, since they may not be meant for errors. +func serveError(w ResponseWriter, text string, code int) { + h := w.Header() + + // nonDefault := false + for _, k := range []string{ + "Cache-Control", + "Content-Encoding", + "Etag", + "Last-Modified", + } { + if !h.has(k) { + continue + } + // if httpservecontentkeepheaders.Value() == "1" { + // nonDefault = true + // } else { + h.Del(k) + // } + } + // if nonDefault { + // httpservecontentkeepheaders.IncNonDefault() + // } + + Error(w, text, code) +} + +// ServeContent replies to the request using the content in the +// provided ReadSeeker. The main benefit of ServeContent over [io.Copy] +// is that it handles Range requests properly, sets the MIME type, and +// handles If-Match, If-Unmodified-Since, If-None-Match, If-Modified-Since, +// and If-Range requests. +// +// If the response's Content-Type header is not set, ServeContent +// first tries to deduce the type from name's file extension and, +// if that fails, falls back to reading the first block of the content +// and passing it to [DetectContentType]. +// The name is otherwise unused; in particular it can be empty and is +// never sent in the response. +// +// If modtime is not the zero time or Unix epoch, ServeContent +// includes it in a Last-Modified header in the response. If the +// request includes an If-Modified-Since header, ServeContent uses +// modtime to decide whether the content needs to be sent at all. +// +// The content's Seek method must work: ServeContent uses +// a seek to the end of the content to determine its size. +// Note that [*os.File] implements the [io.ReadSeeker] interface. +// +// If the caller has set w's ETag header formatted per RFC 7232, section 2.3, +// ServeContent uses it to handle requests using If-Match, If-None-Match, or If-Range. +// +// If an error occurs when serving the request (for example, when +// handling an invalid range request), ServeContent responds with an +// error message. By default, ServeContent strips the Cache-Control, +// Content-Encoding, ETag, and Last-Modified headers from error responses. +// The GODEBUG setting httpservecontentkeepheaders=1 causes ServeContent +// to preserve these headers. +func ServeContent(w ResponseWriter, req *Request, name string, modtime time.Time, content io.ReadSeeker) { + sizeFunc := func() (int64, error) { + size, err := content.Seek(0, io.SeekEnd) + if err != nil { + return 0, errSeeker + } + _, err = content.Seek(0, io.SeekStart) + if err != nil { + return 0, errSeeker + } + return size, nil + } + serveContent(w, req, name, modtime, sizeFunc, content) +} + +// errSeeker is returned by ServeContent's sizeFunc when the content +// doesn't seek properly. The underlying Seeker's error text isn't +// included in the sizeFunc reply so it's not sent over HTTP to end +// users. +var errSeeker = errors.New("seeker can't seek") + +// errNoOverlap is returned by serveContent's parseRange if first-byte-pos of +// all of the byte-range-spec values is greater than the content size. +var errNoOverlap = errors.New("invalid range: failed to overlap") + +// if name is empty, filename is unknown. (used for mime type, before sniffing) +// if modtime.IsZero(), modtime is unknown. +// content must be seeked to the beginning of the file. +// The sizeFunc is called at most once. Its error, if any, is sent in the HTTP response. +func serveContent(w ResponseWriter, r *Request, name string, modtime time.Time, sizeFunc func() (int64, error), content io.ReadSeeker) { + setLastModified(w, modtime) + done, rangeReq := checkPreconditions(w, r, modtime) + if done { + return + } + + code := StatusOK + + // If Content-Type isn't set, use the file's extension to find it, but + // if the Content-Type is unset explicitly, do not sniff the type. + ctypes, haveType := w.Header()["Content-Type"] + var ctype string + if !haveType { + ctype = mime.TypeByExtension(filepath.Ext(name)) + if ctype == "" { + // read a chunk to decide between utf-8 text and binary + var buf [sniffLen]byte + n, _ := io.ReadFull(content, buf[:]) + ctype = DetectContentType(buf[:n]) + _, err := content.Seek(0, io.SeekStart) // rewind to output whole file + if err != nil { + serveError(w, "seeker can't seek", StatusInternalServerError) + return + } + } + w.Header().Set("Content-Type", ctype) + } else if len(ctypes) > 0 { + ctype = ctypes[0] + } + + size, err := sizeFunc() + if err != nil { + serveError(w, err.Error(), StatusInternalServerError) + return + } + if size < 0 { + // Should never happen but just to be sure + serveError(w, "negative content size computed", StatusInternalServerError) + return + } + + // handle Content-Range header. + sendSize := size + var sendContent io.Reader = content + ranges, err := parseRange(rangeReq, size) + switch err { + case nil: + case errNoOverlap: + if size == 0 { + // Some clients add a Range header to all requests to + // limit the size of the response. If the file is empty, + // ignore the range header and respond with a 200 rather + // than a 416. + ranges = nil + break + } + w.Header().Set("Content-Range", fmt.Sprintf("bytes */%d", size)) + fallthrough + default: + serveError(w, err.Error(), StatusRequestedRangeNotSatisfiable) + return + } + + if sumRangesSize(ranges) > size { + // The total number of bytes in all the ranges + // is larger than the size of the file by + // itself, so this is probably an attack, or a + // dumb client. Ignore the range request. + ranges = nil + } + switch { + case len(ranges) == 1: + // RFC 7233, Section 4.1: + // "If a single part is being transferred, the server + // generating the 206 response MUST generate a + // Content-Range header field, describing what range + // of the selected representation is enclosed, and a + // payload consisting of the range. + // ... + // A server MUST NOT generate a multipart response to + // a request for a single range, since a client that + // does not request multiple parts might not support + // multipart responses." + ra := ranges[0] + if _, err := content.Seek(ra.start, io.SeekStart); err != nil { + serveError(w, err.Error(), StatusRequestedRangeNotSatisfiable) + return + } + sendSize = ra.length + code = StatusPartialContent + w.Header().Set("Content-Range", ra.contentRange(size)) + case len(ranges) > 1: + sendSize = rangesMIMESize(ranges, ctype, size) + code = StatusPartialContent + + pr, pw := io.Pipe() + mw := multipart.NewWriter(pw) + w.Header().Set("Content-Type", "multipart/byteranges; boundary="+mw.Boundary()) + sendContent = pr + defer pr.Close() // cause writing goroutine to fail and exit if CopyN doesn't finish. + go func() { + for _, ra := range ranges { + part, err := mw.CreatePart(ra.mimeHeader(ctype, size)) + if err != nil { + pw.CloseWithError(err) + return + } + if _, err := content.Seek(ra.start, io.SeekStart); err != nil { + pw.CloseWithError(err) + return + } + if _, err := io.CopyN(part, content, ra.length); err != nil { + pw.CloseWithError(err) + return + } + } + mw.Close() + pw.Close() + }() + } + + w.Header().Set("Accept-Ranges", "bytes") + + // We should be able to unconditionally set the Content-Length here. + // + // However, there is a pattern observed in the wild that this breaks: + // The user wraps the ResponseWriter in one which gzips data written to it, + // and sets "Content-Encoding: gzip". + // + // The user shouldn't be doing this; the serveContent path here depends + // on serving seekable data with a known length. If you want to compress + // on the fly, then you shouldn't be using ServeFile/ServeContent, or + // you should compress the entire file up-front and provide a seekable + // view of the compressed data. + // + // However, since we've observed this pattern in the wild, and since + // setting Content-Length here breaks code that mostly-works today, + // skip setting Content-Length if the user set Content-Encoding. + // + // If this is a range request, always set Content-Length. + // If the user isn't changing the bytes sent in the ResponseWrite, + // the Content-Length will be correct. + // If the user is changing the bytes sent, then the range request wasn't + // going to work properly anyway and we aren't worse off. + // + // A possible future improvement on this might be to look at the type + // of the ResponseWriter, and always set Content-Length if it's one + // that we recognize. + if len(ranges) > 0 || w.Header().Get("Content-Encoding") == "" { + w.Header().Set("Content-Length", strconv.FormatInt(sendSize, 10)) + } + w.WriteHeader(code) + + if r.Method != "HEAD" { + io.CopyN(w, sendContent, sendSize) + } +} + +// scanETag determines if a syntactically valid ETag is present at s. If so, +// the ETag and remaining text after consuming ETag is returned. Otherwise, +// it returns "", "". +func scanETag(s string) (etag string, remain string) { + s = textproto.TrimString(s) + start := 0 + if strings.HasPrefix(s, "W/") { + start = 2 + } + if len(s[start:]) < 2 || s[start] != '"' { + return "", "" + } + // ETag is either W/"text" or "text". + // See RFC 7232 2.3. + for i := start + 1; i < len(s); i++ { + c := s[i] + switch { + // Character values allowed in ETags. + case c == 0x21 || c >= 0x23 && c <= 0x7E || c >= 0x80: + case c == '"': + return s[:i+1], s[i+1:] + default: + return "", "" + } + } + return "", "" +} + +// etagStrongMatch reports whether a and b match using strong ETag comparison. +// Assumes a and b are valid ETags. +func etagStrongMatch(a, b string) bool { + return a == b && a != "" && a[0] == '"' +} + +// etagWeakMatch reports whether a and b match using weak ETag comparison. +// Assumes a and b are valid ETags. +func etagWeakMatch(a, b string) bool { + return strings.TrimPrefix(a, "W/") == strings.TrimPrefix(b, "W/") +} + +// condResult is the result of an HTTP request precondition check. +// See https://tools.ietf.org/html/rfc7232 section 3. +type condResult int + +const ( + condNone condResult = iota + condTrue + condFalse +) + +func checkIfMatch(w ResponseWriter, r *Request) condResult { + im := r.Header.Get("If-Match") + if im == "" { + return condNone + } + for { + im = textproto.TrimString(im) + if len(im) == 0 { + break + } + if im[0] == ',' { + im = im[1:] + continue + } + if im[0] == '*' { + return condTrue + } + etag, remain := scanETag(im) + if etag == "" { + break + } + if etagStrongMatch(etag, w.Header().get("Etag")) { + return condTrue + } + im = remain + } + + return condFalse +} + +func checkIfUnmodifiedSince(r *Request, modtime time.Time) condResult { + ius := r.Header.Get("If-Unmodified-Since") + if ius == "" || isZeroTime(modtime) { + return condNone + } + t, err := ParseTime(ius) + if err != nil { + return condNone + } + + // The Last-Modified header truncates sub-second precision so + // the modtime needs to be truncated too. + modtime = modtime.Truncate(time.Second) + if ret := modtime.Compare(t); ret <= 0 { + return condTrue + } + return condFalse +} + +func checkIfNoneMatch(w ResponseWriter, r *Request) condResult { + inm := r.Header.get("If-None-Match") + if inm == "" { + return condNone + } + buf := inm + for { + buf = textproto.TrimString(buf) + if len(buf) == 0 { + break + } + if buf[0] == ',' { + buf = buf[1:] + continue + } + if buf[0] == '*' { + return condFalse + } + etag, remain := scanETag(buf) + if etag == "" { + break + } + if etagWeakMatch(etag, w.Header().get("Etag")) { + return condFalse + } + buf = remain + } + return condTrue +} + +func checkIfModifiedSince(r *Request, modtime time.Time) condResult { + if r.Method != "GET" && r.Method != "HEAD" { + return condNone + } + ims := r.Header.Get("If-Modified-Since") + if ims == "" || isZeroTime(modtime) { + return condNone + } + t, err := ParseTime(ims) + if err != nil { + return condNone + } + // The Last-Modified header truncates sub-second precision so + // the modtime needs to be truncated too. + modtime = modtime.Truncate(time.Second) + if ret := modtime.Compare(t); ret <= 0 { + return condFalse + } + return condTrue +} + +func checkIfRange(w ResponseWriter, r *Request, modtime time.Time) condResult { + if r.Method != "GET" && r.Method != "HEAD" { + return condNone + } + ir := r.Header.get("If-Range") + if ir == "" { + return condNone + } + etag, _ := scanETag(ir) + if etag != "" { + if etagStrongMatch(etag, w.Header().Get("Etag")) { + return condTrue + } else { + return condFalse + } + } + // The If-Range value is typically the ETag value, but it may also be + // the modtime date. See golang.org/issue/8367. + if modtime.IsZero() { + return condFalse + } + t, err := ParseTime(ir) + if err != nil { + return condFalse + } + if t.Unix() == modtime.Unix() { + return condTrue + } + return condFalse +} + +var unixEpochTime = time.Unix(0, 0) + +// isZeroTime reports whether t is obviously unspecified (either zero or Unix()=0). +func isZeroTime(t time.Time) bool { + return t.IsZero() || t.Equal(unixEpochTime) +} + +func setLastModified(w ResponseWriter, modtime time.Time) { + if !isZeroTime(modtime) { + w.Header().Set("Last-Modified", modtime.UTC().Format(TimeFormat)) + } +} + +func writeNotModified(w ResponseWriter) { + // RFC 7232 section 4.1: + // a sender SHOULD NOT generate representation metadata other than the + // above listed fields unless said metadata exists for the purpose of + // guiding cache updates (e.g., Last-Modified might be useful if the + // response does not have an ETag field). + h := w.Header() + delete(h, "Content-Type") + delete(h, "Content-Length") + delete(h, "Content-Encoding") + if h.Get("Etag") != "" { + delete(h, "Last-Modified") + } + w.WriteHeader(StatusNotModified) +} + +// checkPreconditions evaluates request preconditions and reports whether a precondition +// resulted in sending StatusNotModified or StatusPreconditionFailed. +func checkPreconditions(w ResponseWriter, r *Request, modtime time.Time) (done bool, rangeHeader string) { + // This function carefully follows RFC 7232 section 6. + ch := checkIfMatch(w, r) + if ch == condNone { + ch = checkIfUnmodifiedSince(r, modtime) + } + if ch == condFalse { + w.WriteHeader(StatusPreconditionFailed) + return true, "" + } + switch checkIfNoneMatch(w, r) { + case condFalse: + if r.Method == "GET" || r.Method == "HEAD" { + writeNotModified(w) + return true, "" + } else { + w.WriteHeader(StatusPreconditionFailed) + return true, "" + } + case condNone: + if checkIfModifiedSince(r, modtime) == condFalse { + writeNotModified(w) + return true, "" + } + } + + rangeHeader = r.Header.get("Range") + if rangeHeader != "" && checkIfRange(w, r, modtime) == condFalse { + rangeHeader = "" + } + return false, rangeHeader +} + +// name is '/'-separated, not filepath.Separator. +func serveFile(w ResponseWriter, r *Request, fs FileSystem, name string, redirect bool) { + const indexPage = "/index.html" + + // redirect .../index.html to .../ + // can't use Redirect() because that would make the path absolute, + // which would be a problem running under StripPrefix + if strings.HasSuffix(r.URL.Path, indexPage) { + localRedirect(w, r, "./") + return + } + + f, err := fs.Open(name) + if err != nil { + msg, code := toHTTPError(err) + serveError(w, msg, code) + return + } + defer f.Close() + + d, err := f.Stat() + if err != nil { + msg, code := toHTTPError(err) + serveError(w, msg, code) + return + } + + if redirect { + // redirect to canonical path: / at end of directory url + // r.URL.Path always begins with / + url := r.URL.Path + if d.IsDir() { + if url[len(url)-1] != '/' { + localRedirect(w, r, path.Base(url)+"/") + return + } + } else if url[len(url)-1] == '/' { + base := path.Base(url) + if base == "/" || base == "." { + // The FileSystem maps a path like "/" or "/./" to a file instead of a directory. + msg := "http: attempting to traverse a non-directory" + serveError(w, msg, StatusInternalServerError) + return + } + localRedirect(w, r, "../"+base) + return + } + } + + if d.IsDir() { + url := r.URL.Path + // redirect if the directory name doesn't end in a slash + if url == "" || url[len(url)-1] != '/' { + localRedirect(w, r, path.Base(url)+"/") + return + } + + // use contents of index.html for directory, if present + index := strings.TrimSuffix(name, "/") + indexPage + ff, err := fs.Open(index) + if err == nil { + defer ff.Close() + dd, err := ff.Stat() + if err == nil { + d = dd + f = ff + } + } + } + + // Still a directory? (we didn't find an index.html file) + if d.IsDir() { + if checkIfModifiedSince(r, d.ModTime()) == condFalse { + writeNotModified(w) + return + } + setLastModified(w, d.ModTime()) + dirList(w, r, f) + return + } + + // serveContent will check modification time + sizeFunc := func() (int64, error) { return d.Size(), nil } + serveContent(w, r, d.Name(), d.ModTime(), sizeFunc, f) +} + +// toHTTPError returns a non-specific HTTP error message and status code +// for a given non-nil error value. It's important that toHTTPError does not +// actually return err.Error(), since msg and httpStatus are returned to users, +// and historically Go's ServeContent always returned just "404 Not Found" for +// all errors. We don't want to start leaking information in error messages. +func toHTTPError(err error) (msg string, httpStatus int) { + if errors.Is(err, fs.ErrNotExist) { + return "404 page not found", StatusNotFound + } + if errors.Is(err, fs.ErrPermission) { + return "403 Forbidden", StatusForbidden + } + if errors.Is(err, errInvalidUnsafePath) { + return "404 page not found", StatusNotFound + } + // Default: + return "500 Internal Server Error", StatusInternalServerError +} + +// localRedirect gives a Moved Permanently response. +// It does not convert relative paths to absolute paths like Redirect does. +func localRedirect(w ResponseWriter, r *Request, newPath string) { + if q := r.URL.RawQuery; q != "" { + newPath += "?" + q + } + w.Header().Set("Location", newPath) + w.WriteHeader(StatusMovedPermanently) +} + +// ServeFile replies to the request with the contents of the named +// file or directory. +// +// If the provided file or directory name is a relative path, it is +// interpreted relative to the current directory and may ascend to +// parent directories. If the provided name is constructed from user +// input, it should be sanitized before calling [ServeFile]. +// +// As a precaution, ServeFile will reject requests where r.URL.Path +// contains a ".." path element; this protects against callers who +// might unsafely use [filepath.Join] on r.URL.Path without sanitizing +// it and then use that filepath.Join result as the name argument. +// +// As another special case, ServeFile redirects any request where r.URL.Path +// ends in "/index.html" to the same path, without the final +// "index.html". To avoid such redirects either modify the path or +// use [ServeContent]. +// +// Outside of those two special cases, ServeFile does not use +// r.URL.Path for selecting the file or directory to serve; only the +// file or directory provided in the name argument is used. +func ServeFile(w ResponseWriter, r *Request, name string) { + if containsDotDot(r.URL.Path) { + // Too many programs use r.URL.Path to construct the argument to + // serveFile. Reject the request under the assumption that happened + // here and ".." may not be wanted. + // Note that name might not contain "..", for example if code (still + // incorrectly) used filepath.Join(myDir, r.URL.Path). + serveError(w, "invalid URL path", StatusBadRequest) + return + } + dir, file := filepath.Split(name) + serveFile(w, r, Dir(dir), file, false) +} + +// ServeFileFS replies to the request with the contents +// of the named file or directory from the file system fsys. +// The files provided by fsys must implement [io.Seeker]. +// +// If the provided name is constructed from user input, it should be +// sanitized before calling [ServeFileFS]. +// +// As a precaution, ServeFileFS will reject requests where r.URL.Path +// contains a ".." path element; this protects against callers who +// might unsafely use [filepath.Join] on r.URL.Path without sanitizing +// it and then use that filepath.Join result as the name argument. +// +// As another special case, ServeFileFS redirects any request where r.URL.Path +// ends in "/index.html" to the same path, without the final +// "index.html". To avoid such redirects either modify the path or +// use [ServeContent]. +// +// Outside of those two special cases, ServeFileFS does not use +// r.URL.Path for selecting the file or directory to serve; only the +// file or directory provided in the name argument is used. +func ServeFileFS(w ResponseWriter, r *Request, fsys fs.FS, name string) { + if containsDotDot(r.URL.Path) { + // Too many programs use r.URL.Path to construct the argument to + // serveFile. Reject the request under the assumption that happened + // here and ".." may not be wanted. + // Note that name might not contain "..", for example if code (still + // incorrectly) used filepath.Join(myDir, r.URL.Path). + serveError(w, "invalid URL path", StatusBadRequest) + return + } + serveFile(w, r, FS(fsys), name, false) +} + +func containsDotDot(v string) bool { + if !strings.Contains(v, "..") { + return false + } + for ent := range strings.FieldsFuncSeq(v, isSlashRune) { + if ent == ".." { + return true + } + } + return false +} + +func isSlashRune(r rune) bool { return r == '/' || r == '\\' } + +type fileHandler struct { + root FileSystem +} + +type ioFS struct { + fsys fs.FS +} + +type ioFile struct { + file fs.File +} + +func (f ioFS) Open(name string) (File, error) { + if name == "/" { + name = "." + } else { + name = strings.TrimPrefix(name, "/") + } + file, err := f.fsys.Open(name) + if err != nil { + return nil, mapOpenError(err, name, '/', func(path string) (fs.FileInfo, error) { + return fs.Stat(f.fsys, path) + }) + } + return ioFile{file}, nil +} + +func (f ioFile) Close() error { return f.file.Close() } +func (f ioFile) Read(b []byte) (int, error) { return f.file.Read(b) } +func (f ioFile) Stat() (fs.FileInfo, error) { return f.file.Stat() } + +var errMissingSeek = errors.New("io.File missing Seek method") +var errMissingReadDir = errors.New("io.File directory missing ReadDir method") + +func (f ioFile) Seek(offset int64, whence int) (int64, error) { + s, ok := f.file.(io.Seeker) + if !ok { + return 0, errMissingSeek + } + return s.Seek(offset, whence) +} + +func (f ioFile) ReadDir(count int) ([]fs.DirEntry, error) { + d, ok := f.file.(fs.ReadDirFile) + if !ok { + return nil, errMissingReadDir + } + return d.ReadDir(count) +} + +func (f ioFile) Readdir(count int) ([]fs.FileInfo, error) { + d, ok := f.file.(fs.ReadDirFile) + if !ok { + return nil, errMissingReadDir + } + var list []fs.FileInfo + for { + dirs, err := d.ReadDir(count - len(list)) + for _, dir := range dirs { + info, err := dir.Info() + if err != nil { + // Pretend it doesn't exist, like (*os.File).Readdir does. + continue + } + list = append(list, info) + } + if err != nil { + return list, err + } + if count < 0 || len(list) >= count { + break + } + } + return list, nil +} + +// FS converts fsys to a [FileSystem] implementation, +// for use with [FileServer] and [NewFileTransport]. +// The files provided by fsys must implement [io.Seeker]. +func FS(fsys fs.FS) FileSystem { + return ioFS{fsys} +} + +// FileServer returns a handler that serves HTTP requests +// with the contents of the file system rooted at root. +// +// As a special case, the returned file server redirects any request +// ending in "/index.html" to the same path, without the final +// "index.html". +// +// To use the operating system's file system implementation, +// use [http.Dir]: +// +// http.Handle("/", http.FileServer(http.Dir("/tmp"))) +// +// To use an [fs.FS] implementation, use [http.FileServerFS] instead. +func FileServer(root FileSystem) Handler { + return &fileHandler{root} +} + +// FileServerFS returns a handler that serves HTTP requests +// with the contents of the file system fsys. +// The files provided by fsys must implement [io.Seeker]. +// +// As a special case, the returned file server redirects any request +// ending in "/index.html" to the same path, without the final +// "index.html". +// +// http.Handle("/", http.FileServerFS(fsys)) +func FileServerFS(root fs.FS) Handler { + return FileServer(FS(root)) +} + +func (f *fileHandler) ServeHTTP(w ResponseWriter, r *Request) { + upath := r.URL.Path + if !strings.HasPrefix(upath, "/") { + upath = "/" + upath + r.URL.Path = upath + } + serveFile(w, r, f.root, path.Clean(upath), true) +} + +// httpRange specifies the byte range to be sent to the client. +type httpRange struct { + start, length int64 +} + +func (r httpRange) contentRange(size int64) string { + return fmt.Sprintf("bytes %d-%d/%d", r.start, r.start+r.length-1, size) +} + +func (r httpRange) mimeHeader(contentType string, size int64) textproto.MIMEHeader { + return textproto.MIMEHeader{ + "Content-Range": {r.contentRange(size)}, + "Content-Type": {contentType}, + } +} + +// parseRange parses a Range header string as per RFC 7233. +// errNoOverlap is returned if none of the ranges overlap. +func parseRange(s string, size int64) ([]httpRange, error) { + if s == "" { + return nil, nil // header not present + } + const b = "bytes=" + if !strings.HasPrefix(s, b) { + return nil, errors.New("invalid range") + } + var ranges []httpRange + noOverlap := false + for ra := range strings.SplitSeq(s[len(b):], ",") { + ra = textproto.TrimString(ra) + if ra == "" { + continue + } + start, end, ok := strings.Cut(ra, "-") + if !ok { + return nil, errors.New("invalid range") + } + start, end = textproto.TrimString(start), textproto.TrimString(end) + var r httpRange + if start == "" { + // If no start is specified, end specifies the + // range start relative to the end of the file, + // and we are dealing with + // which has to be a non-negative integer as per + // RFC 7233 Section 2.1 "Byte-Ranges". + if end == "" || end[0] == '-' { + return nil, errors.New("invalid range") + } + i, err := strconv.ParseInt(end, 10, 64) + if i < 0 || err != nil { + return nil, errors.New("invalid range") + } + if i > size { + i = size + } + r.start = size - i + r.length = size - r.start + } else { + i, err := strconv.ParseInt(start, 10, 64) + if err != nil || i < 0 { + return nil, errors.New("invalid range") + } + if i >= size { + // If the range begins after the size of the content, + // then it does not overlap. + noOverlap = true + continue + } + r.start = i + if end == "" { + // If no end is specified, range extends to end of the file. + r.length = size - r.start + } else { + i, err := strconv.ParseInt(end, 10, 64) + if err != nil || r.start > i { + return nil, errors.New("invalid range") + } + if i >= size { + i = size - 1 + } + r.length = i - r.start + 1 + } + } + ranges = append(ranges, r) + } + if noOverlap && len(ranges) == 0 { + // The specified ranges did not overlap with the content. + return nil, errNoOverlap + } + return ranges, nil +} + +// countingWriter counts how many bytes have been written to it. +type countingWriter int64 + +func (w *countingWriter) Write(p []byte) (n int, err error) { + *w += countingWriter(len(p)) + return len(p), nil +} + +// rangesMIMESize returns the number of bytes it takes to encode the +// provided ranges as a multipart response. +func rangesMIMESize(ranges []httpRange, contentType string, contentSize int64) (encSize int64) { + var w countingWriter + mw := multipart.NewWriter(&w) + for _, ra := range ranges { + mw.CreatePart(ra.mimeHeader(contentType, contentSize)) + encSize += ra.length + } + mw.Close() + encSize += int64(w) + return +} + +func sumRangesSize(ranges []httpRange) (size int64) { + for _, ra := range ranges { + size += ra.length + } + return +} diff --git a/backend/vendor/github.com/enetx/http/h2_bundle.go b/backend/vendor/github.com/enetx/http/h2_bundle.go new file mode 100644 index 0000000..99c78ca --- /dev/null +++ b/backend/vendor/github.com/enetx/http/h2_bundle.go @@ -0,0 +1,11994 @@ +//go:build !nethttpomithttp2 + +// Code generated by golang.org/x/tools/cmd/bundle. DO NOT EDIT. +// $ bundle -o h2_bundle.go -prefix http2 -tags !nethttpomithttp2 github.com/enetx/http2 + +// Package http2 implements the HTTP/2 protocol. +// +// This package is low-level and intended to be used directly by very +// few people. Most users will use it indirectly through the automatic +// use by the net/http package (from Go 1.6 and later). +// For use in earlier Go versions see ConfigureServer. (Transport support +// requires Go 1.6 or later) +// +// See https://http2.github.io/ for more information on HTTP/2. +// + +package http + +import ( + "bufio" + "bytes" + "compress/gzip" + "context" + "crypto/rand" + "crypto/tls" + "encoding/binary" + "errors" + "fmt" + "io" + "io/fs" + "log" + "math" + "math/bits" + mathrand "math/rand" + "net" + "net/textproto" + "net/url" + "os" + "reflect" + "runtime" + "sort" + "strconv" + "strings" + "sync" + "sync/atomic" + "time" + + "github.com/enetx/http/httptrace" + "github.com/enetx/http2/httpcommon" + "golang.org/x/net/http/httpguts" + "golang.org/x/net/http2/hpack" + "golang.org/x/net/idna" +) + +// The HTTP protocols are defined in terms of ASCII, not Unicode. This file +// contains helper functions which may use Unicode-aware functions which would +// otherwise be unsafe and could introduce vulnerabilities if used improperly. + +// asciiEqualFold is strings.EqualFold, ASCII only. It reports whether s and t +// are equal, ASCII-case-insensitively. +func http2asciiEqualFold(s, t string) bool { + if len(s) != len(t) { + return false + } + for i := 0; i < len(s); i++ { + if http2lower(s[i]) != http2lower(t[i]) { + return false + } + } + return true +} + +// lower returns the ASCII lowercase version of b. +func http2lower(b byte) byte { + if 'A' <= b && b <= 'Z' { + return b + ('a' - 'A') + } + return b +} + +// isASCIIPrint returns whether s is ASCII and printable according to +// https://tools.ietf.org/html/rfc20#section-4.2. +func http2isASCIIPrint(s string) bool { + for i := 0; i < len(s); i++ { + if s[i] < ' ' || s[i] > '~' { + return false + } + } + return true +} + +// asciiToLower returns the lowercase version of s if s is ASCII and printable, +// and whether or not it was. +func http2asciiToLower(s string) (lower string, ok bool) { + if !http2isASCIIPrint(s) { + return "", false + } + return strings.ToLower(s), true +} + +// A list of the possible cipher suite ids. Taken from +// https://www.iana.org/assignments/tls-parameters/tls-parameters.txt + +const ( + http2cipher_TLS_NULL_WITH_NULL_NULL uint16 = 0x0000 + http2cipher_TLS_RSA_WITH_NULL_MD5 uint16 = 0x0001 + http2cipher_TLS_RSA_WITH_NULL_SHA uint16 = 0x0002 + http2cipher_TLS_RSA_EXPORT_WITH_RC4_40_MD5 uint16 = 0x0003 + http2cipher_TLS_RSA_WITH_RC4_128_MD5 uint16 = 0x0004 + http2cipher_TLS_RSA_WITH_RC4_128_SHA uint16 = 0x0005 + http2cipher_TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5 uint16 = 0x0006 + http2cipher_TLS_RSA_WITH_IDEA_CBC_SHA uint16 = 0x0007 + http2cipher_TLS_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0008 + http2cipher_TLS_RSA_WITH_DES_CBC_SHA uint16 = 0x0009 + http2cipher_TLS_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x000A + http2cipher_TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x000B + http2cipher_TLS_DH_DSS_WITH_DES_CBC_SHA uint16 = 0x000C + http2cipher_TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0x000D + http2cipher_TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x000E + http2cipher_TLS_DH_RSA_WITH_DES_CBC_SHA uint16 = 0x000F + http2cipher_TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x0010 + http2cipher_TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0011 + http2cipher_TLS_DHE_DSS_WITH_DES_CBC_SHA uint16 = 0x0012 + http2cipher_TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0x0013 + http2cipher_TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0014 + http2cipher_TLS_DHE_RSA_WITH_DES_CBC_SHA uint16 = 0x0015 + http2cipher_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x0016 + http2cipher_TLS_DH_anon_EXPORT_WITH_RC4_40_MD5 uint16 = 0x0017 + http2cipher_TLS_DH_anon_WITH_RC4_128_MD5 uint16 = 0x0018 + http2cipher_TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0019 + http2cipher_TLS_DH_anon_WITH_DES_CBC_SHA uint16 = 0x001A + http2cipher_TLS_DH_anon_WITH_3DES_EDE_CBC_SHA uint16 = 0x001B + // Reserved uint16 = 0x001C-1D + http2cipher_TLS_KRB5_WITH_DES_CBC_SHA uint16 = 0x001E + http2cipher_TLS_KRB5_WITH_3DES_EDE_CBC_SHA uint16 = 0x001F + http2cipher_TLS_KRB5_WITH_RC4_128_SHA uint16 = 0x0020 + http2cipher_TLS_KRB5_WITH_IDEA_CBC_SHA uint16 = 0x0021 + http2cipher_TLS_KRB5_WITH_DES_CBC_MD5 uint16 = 0x0022 + http2cipher_TLS_KRB5_WITH_3DES_EDE_CBC_MD5 uint16 = 0x0023 + http2cipher_TLS_KRB5_WITH_RC4_128_MD5 uint16 = 0x0024 + http2cipher_TLS_KRB5_WITH_IDEA_CBC_MD5 uint16 = 0x0025 + http2cipher_TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA uint16 = 0x0026 + http2cipher_TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA uint16 = 0x0027 + http2cipher_TLS_KRB5_EXPORT_WITH_RC4_40_SHA uint16 = 0x0028 + http2cipher_TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5 uint16 = 0x0029 + http2cipher_TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5 uint16 = 0x002A + http2cipher_TLS_KRB5_EXPORT_WITH_RC4_40_MD5 uint16 = 0x002B + http2cipher_TLS_PSK_WITH_NULL_SHA uint16 = 0x002C + http2cipher_TLS_DHE_PSK_WITH_NULL_SHA uint16 = 0x002D + http2cipher_TLS_RSA_PSK_WITH_NULL_SHA uint16 = 0x002E + http2cipher_TLS_RSA_WITH_AES_128_CBC_SHA uint16 = 0x002F + http2cipher_TLS_DH_DSS_WITH_AES_128_CBC_SHA uint16 = 0x0030 + http2cipher_TLS_DH_RSA_WITH_AES_128_CBC_SHA uint16 = 0x0031 + http2cipher_TLS_DHE_DSS_WITH_AES_128_CBC_SHA uint16 = 0x0032 + http2cipher_TLS_DHE_RSA_WITH_AES_128_CBC_SHA uint16 = 0x0033 + http2cipher_TLS_DH_anon_WITH_AES_128_CBC_SHA uint16 = 0x0034 + http2cipher_TLS_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0035 + http2cipher_TLS_DH_DSS_WITH_AES_256_CBC_SHA uint16 = 0x0036 + http2cipher_TLS_DH_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0037 + http2cipher_TLS_DHE_DSS_WITH_AES_256_CBC_SHA uint16 = 0x0038 + http2cipher_TLS_DHE_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0039 + http2cipher_TLS_DH_anon_WITH_AES_256_CBC_SHA uint16 = 0x003A + http2cipher_TLS_RSA_WITH_NULL_SHA256 uint16 = 0x003B + http2cipher_TLS_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x003C + http2cipher_TLS_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x003D + http2cipher_TLS_DH_DSS_WITH_AES_128_CBC_SHA256 uint16 = 0x003E + http2cipher_TLS_DH_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x003F + http2cipher_TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 uint16 = 0x0040 + http2cipher_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0041 + http2cipher_TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0042 + http2cipher_TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0043 + http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0044 + http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0045 + http2cipher_TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0046 + // Reserved uint16 = 0x0047-4F + // Reserved uint16 = 0x0050-58 + // Reserved uint16 = 0x0059-5C + // Unassigned uint16 = 0x005D-5F + // Reserved uint16 = 0x0060-66 + http2cipher_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x0067 + http2cipher_TLS_DH_DSS_WITH_AES_256_CBC_SHA256 uint16 = 0x0068 + http2cipher_TLS_DH_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x0069 + http2cipher_TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 uint16 = 0x006A + http2cipher_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x006B + http2cipher_TLS_DH_anon_WITH_AES_128_CBC_SHA256 uint16 = 0x006C + http2cipher_TLS_DH_anon_WITH_AES_256_CBC_SHA256 uint16 = 0x006D + // Unassigned uint16 = 0x006E-83 + http2cipher_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0084 + http2cipher_TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0085 + http2cipher_TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0086 + http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0087 + http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0088 + http2cipher_TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0089 + http2cipher_TLS_PSK_WITH_RC4_128_SHA uint16 = 0x008A + http2cipher_TLS_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x008B + http2cipher_TLS_PSK_WITH_AES_128_CBC_SHA uint16 = 0x008C + http2cipher_TLS_PSK_WITH_AES_256_CBC_SHA uint16 = 0x008D + http2cipher_TLS_DHE_PSK_WITH_RC4_128_SHA uint16 = 0x008E + http2cipher_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x008F + http2cipher_TLS_DHE_PSK_WITH_AES_128_CBC_SHA uint16 = 0x0090 + http2cipher_TLS_DHE_PSK_WITH_AES_256_CBC_SHA uint16 = 0x0091 + http2cipher_TLS_RSA_PSK_WITH_RC4_128_SHA uint16 = 0x0092 + http2cipher_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x0093 + http2cipher_TLS_RSA_PSK_WITH_AES_128_CBC_SHA uint16 = 0x0094 + http2cipher_TLS_RSA_PSK_WITH_AES_256_CBC_SHA uint16 = 0x0095 + http2cipher_TLS_RSA_WITH_SEED_CBC_SHA uint16 = 0x0096 + http2cipher_TLS_DH_DSS_WITH_SEED_CBC_SHA uint16 = 0x0097 + http2cipher_TLS_DH_RSA_WITH_SEED_CBC_SHA uint16 = 0x0098 + http2cipher_TLS_DHE_DSS_WITH_SEED_CBC_SHA uint16 = 0x0099 + http2cipher_TLS_DHE_RSA_WITH_SEED_CBC_SHA uint16 = 0x009A + http2cipher_TLS_DH_anon_WITH_SEED_CBC_SHA uint16 = 0x009B + http2cipher_TLS_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x009C + http2cipher_TLS_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x009D + http2cipher_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x009E + http2cipher_TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x009F + http2cipher_TLS_DH_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x00A0 + http2cipher_TLS_DH_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x00A1 + http2cipher_TLS_DHE_DSS_WITH_AES_128_GCM_SHA256 uint16 = 0x00A2 + http2cipher_TLS_DHE_DSS_WITH_AES_256_GCM_SHA384 uint16 = 0x00A3 + http2cipher_TLS_DH_DSS_WITH_AES_128_GCM_SHA256 uint16 = 0x00A4 + http2cipher_TLS_DH_DSS_WITH_AES_256_GCM_SHA384 uint16 = 0x00A5 + http2cipher_TLS_DH_anon_WITH_AES_128_GCM_SHA256 uint16 = 0x00A6 + http2cipher_TLS_DH_anon_WITH_AES_256_GCM_SHA384 uint16 = 0x00A7 + http2cipher_TLS_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00A8 + http2cipher_TLS_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00A9 + http2cipher_TLS_DHE_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00AA + http2cipher_TLS_DHE_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00AB + http2cipher_TLS_RSA_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00AC + http2cipher_TLS_RSA_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00AD + http2cipher_TLS_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00AE + http2cipher_TLS_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00AF + http2cipher_TLS_PSK_WITH_NULL_SHA256 uint16 = 0x00B0 + http2cipher_TLS_PSK_WITH_NULL_SHA384 uint16 = 0x00B1 + http2cipher_TLS_DHE_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00B2 + http2cipher_TLS_DHE_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00B3 + http2cipher_TLS_DHE_PSK_WITH_NULL_SHA256 uint16 = 0x00B4 + http2cipher_TLS_DHE_PSK_WITH_NULL_SHA384 uint16 = 0x00B5 + http2cipher_TLS_RSA_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00B6 + http2cipher_TLS_RSA_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00B7 + http2cipher_TLS_RSA_PSK_WITH_NULL_SHA256 uint16 = 0x00B8 + http2cipher_TLS_RSA_PSK_WITH_NULL_SHA384 uint16 = 0x00B9 + http2cipher_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BA + http2cipher_TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BB + http2cipher_TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BC + http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BD + http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BE + http2cipher_TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BF + http2cipher_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C0 + http2cipher_TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C1 + http2cipher_TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C2 + http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C3 + http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C4 + http2cipher_TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C5 + // Unassigned uint16 = 0x00C6-FE + http2cipher_TLS_EMPTY_RENEGOTIATION_INFO_SCSV uint16 = 0x00FF + // Unassigned uint16 = 0x01-55,* + http2cipher_TLS_FALLBACK_SCSV uint16 = 0x5600 + // Unassigned uint16 = 0x5601 - 0xC000 + http2cipher_TLS_ECDH_ECDSA_WITH_NULL_SHA uint16 = 0xC001 + http2cipher_TLS_ECDH_ECDSA_WITH_RC4_128_SHA uint16 = 0xC002 + http2cipher_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC003 + http2cipher_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA uint16 = 0xC004 + http2cipher_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA uint16 = 0xC005 + http2cipher_TLS_ECDHE_ECDSA_WITH_NULL_SHA uint16 = 0xC006 + http2cipher_TLS_ECDHE_ECDSA_WITH_RC4_128_SHA uint16 = 0xC007 + http2cipher_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC008 + http2cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA uint16 = 0xC009 + http2cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA uint16 = 0xC00A + http2cipher_TLS_ECDH_RSA_WITH_NULL_SHA uint16 = 0xC00B + http2cipher_TLS_ECDH_RSA_WITH_RC4_128_SHA uint16 = 0xC00C + http2cipher_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC00D + http2cipher_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC00E + http2cipher_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC00F + http2cipher_TLS_ECDHE_RSA_WITH_NULL_SHA uint16 = 0xC010 + http2cipher_TLS_ECDHE_RSA_WITH_RC4_128_SHA uint16 = 0xC011 + http2cipher_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC012 + http2cipher_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC013 + http2cipher_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC014 + http2cipher_TLS_ECDH_anon_WITH_NULL_SHA uint16 = 0xC015 + http2cipher_TLS_ECDH_anon_WITH_RC4_128_SHA uint16 = 0xC016 + http2cipher_TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA uint16 = 0xC017 + http2cipher_TLS_ECDH_anon_WITH_AES_128_CBC_SHA uint16 = 0xC018 + http2cipher_TLS_ECDH_anon_WITH_AES_256_CBC_SHA uint16 = 0xC019 + http2cipher_TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01A + http2cipher_TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01B + http2cipher_TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01C + http2cipher_TLS_SRP_SHA_WITH_AES_128_CBC_SHA uint16 = 0xC01D + http2cipher_TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC01E + http2cipher_TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA uint16 = 0xC01F + http2cipher_TLS_SRP_SHA_WITH_AES_256_CBC_SHA uint16 = 0xC020 + http2cipher_TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC021 + http2cipher_TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA uint16 = 0xC022 + http2cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC023 + http2cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC024 + http2cipher_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC025 + http2cipher_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC026 + http2cipher_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC027 + http2cipher_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC028 + http2cipher_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC029 + http2cipher_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC02A + http2cipher_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02B + http2cipher_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC02C + http2cipher_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02D + http2cipher_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC02E + http2cipher_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02F + http2cipher_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC030 + http2cipher_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC031 + http2cipher_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC032 + http2cipher_TLS_ECDHE_PSK_WITH_RC4_128_SHA uint16 = 0xC033 + http2cipher_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0xC034 + http2cipher_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA uint16 = 0xC035 + http2cipher_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA uint16 = 0xC036 + http2cipher_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0xC037 + http2cipher_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0xC038 + http2cipher_TLS_ECDHE_PSK_WITH_NULL_SHA uint16 = 0xC039 + http2cipher_TLS_ECDHE_PSK_WITH_NULL_SHA256 uint16 = 0xC03A + http2cipher_TLS_ECDHE_PSK_WITH_NULL_SHA384 uint16 = 0xC03B + http2cipher_TLS_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC03C + http2cipher_TLS_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC03D + http2cipher_TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC03E + http2cipher_TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC03F + http2cipher_TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC040 + http2cipher_TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC041 + http2cipher_TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC042 + http2cipher_TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC043 + http2cipher_TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC044 + http2cipher_TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC045 + http2cipher_TLS_DH_anon_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC046 + http2cipher_TLS_DH_anon_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC047 + http2cipher_TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC048 + http2cipher_TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC049 + http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04A + http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04B + http2cipher_TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04C + http2cipher_TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04D + http2cipher_TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04E + http2cipher_TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04F + http2cipher_TLS_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC050 + http2cipher_TLS_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC051 + http2cipher_TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC052 + http2cipher_TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC053 + http2cipher_TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC054 + http2cipher_TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC055 + http2cipher_TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC056 + http2cipher_TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC057 + http2cipher_TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC058 + http2cipher_TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC059 + http2cipher_TLS_DH_anon_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05A + http2cipher_TLS_DH_anon_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05B + http2cipher_TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05C + http2cipher_TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05D + http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05E + http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05F + http2cipher_TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC060 + http2cipher_TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC061 + http2cipher_TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC062 + http2cipher_TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC063 + http2cipher_TLS_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC064 + http2cipher_TLS_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC065 + http2cipher_TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC066 + http2cipher_TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC067 + http2cipher_TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC068 + http2cipher_TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC069 + http2cipher_TLS_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06A + http2cipher_TLS_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06B + http2cipher_TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06C + http2cipher_TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06D + http2cipher_TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06E + http2cipher_TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06F + http2cipher_TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC070 + http2cipher_TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC071 + http2cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC072 + http2cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC073 + http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC074 + http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC075 + http2cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC076 + http2cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC077 + http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC078 + http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC079 + http2cipher_TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07A + http2cipher_TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07B + http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07C + http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07D + http2cipher_TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07E + http2cipher_TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07F + http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC080 + http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC081 + http2cipher_TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC082 + http2cipher_TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC083 + http2cipher_TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC084 + http2cipher_TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC085 + http2cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC086 + http2cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC087 + http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC088 + http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC089 + http2cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08A + http2cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08B + http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08C + http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08D + http2cipher_TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08E + http2cipher_TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08F + http2cipher_TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC090 + http2cipher_TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC091 + http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC092 + http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC093 + http2cipher_TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC094 + http2cipher_TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC095 + http2cipher_TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC096 + http2cipher_TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC097 + http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC098 + http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC099 + http2cipher_TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC09A + http2cipher_TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC09B + http2cipher_TLS_RSA_WITH_AES_128_CCM uint16 = 0xC09C + http2cipher_TLS_RSA_WITH_AES_256_CCM uint16 = 0xC09D + http2cipher_TLS_DHE_RSA_WITH_AES_128_CCM uint16 = 0xC09E + http2cipher_TLS_DHE_RSA_WITH_AES_256_CCM uint16 = 0xC09F + http2cipher_TLS_RSA_WITH_AES_128_CCM_8 uint16 = 0xC0A0 + http2cipher_TLS_RSA_WITH_AES_256_CCM_8 uint16 = 0xC0A1 + http2cipher_TLS_DHE_RSA_WITH_AES_128_CCM_8 uint16 = 0xC0A2 + http2cipher_TLS_DHE_RSA_WITH_AES_256_CCM_8 uint16 = 0xC0A3 + http2cipher_TLS_PSK_WITH_AES_128_CCM uint16 = 0xC0A4 + http2cipher_TLS_PSK_WITH_AES_256_CCM uint16 = 0xC0A5 + http2cipher_TLS_DHE_PSK_WITH_AES_128_CCM uint16 = 0xC0A6 + http2cipher_TLS_DHE_PSK_WITH_AES_256_CCM uint16 = 0xC0A7 + http2cipher_TLS_PSK_WITH_AES_128_CCM_8 uint16 = 0xC0A8 + http2cipher_TLS_PSK_WITH_AES_256_CCM_8 uint16 = 0xC0A9 + http2cipher_TLS_PSK_DHE_WITH_AES_128_CCM_8 uint16 = 0xC0AA + http2cipher_TLS_PSK_DHE_WITH_AES_256_CCM_8 uint16 = 0xC0AB + http2cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CCM uint16 = 0xC0AC + http2cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CCM uint16 = 0xC0AD + http2cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8 uint16 = 0xC0AE + http2cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8 uint16 = 0xC0AF + // Unassigned uint16 = 0xC0B0-FF + // Unassigned uint16 = 0xC1-CB,* + // Unassigned uint16 = 0xCC00-A7 + http2cipher_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCA8 + http2cipher_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCA9 + http2cipher_TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCAA + http2cipher_TLS_PSK_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCAB + http2cipher_TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCAC + http2cipher_TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCAD + http2cipher_TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCAE +) + +// isBadCipher reports whether the cipher is blacklisted by the HTTP/2 spec. +// References: +// https://tools.ietf.org/html/rfc7540#appendix-A +// Reject cipher suites from Appendix A. +// "This list includes those cipher suites that do not +// offer an ephemeral key exchange and those that are +// based on the TLS null, stream or block cipher type" +func http2isBadCipher(cipher uint16) bool { + switch cipher { + case http2cipher_TLS_NULL_WITH_NULL_NULL, + http2cipher_TLS_RSA_WITH_NULL_MD5, + http2cipher_TLS_RSA_WITH_NULL_SHA, + http2cipher_TLS_RSA_EXPORT_WITH_RC4_40_MD5, + http2cipher_TLS_RSA_WITH_RC4_128_MD5, + http2cipher_TLS_RSA_WITH_RC4_128_SHA, + http2cipher_TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5, + http2cipher_TLS_RSA_WITH_IDEA_CBC_SHA, + http2cipher_TLS_RSA_EXPORT_WITH_DES40_CBC_SHA, + http2cipher_TLS_RSA_WITH_DES_CBC_SHA, + http2cipher_TLS_RSA_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA, + http2cipher_TLS_DH_DSS_WITH_DES_CBC_SHA, + http2cipher_TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA, + http2cipher_TLS_DH_RSA_WITH_DES_CBC_SHA, + http2cipher_TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA, + http2cipher_TLS_DHE_DSS_WITH_DES_CBC_SHA, + http2cipher_TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA, + http2cipher_TLS_DHE_RSA_WITH_DES_CBC_SHA, + http2cipher_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_DH_anon_EXPORT_WITH_RC4_40_MD5, + http2cipher_TLS_DH_anon_WITH_RC4_128_MD5, + http2cipher_TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA, + http2cipher_TLS_DH_anon_WITH_DES_CBC_SHA, + http2cipher_TLS_DH_anon_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_KRB5_WITH_DES_CBC_SHA, + http2cipher_TLS_KRB5_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_KRB5_WITH_RC4_128_SHA, + http2cipher_TLS_KRB5_WITH_IDEA_CBC_SHA, + http2cipher_TLS_KRB5_WITH_DES_CBC_MD5, + http2cipher_TLS_KRB5_WITH_3DES_EDE_CBC_MD5, + http2cipher_TLS_KRB5_WITH_RC4_128_MD5, + http2cipher_TLS_KRB5_WITH_IDEA_CBC_MD5, + http2cipher_TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA, + http2cipher_TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA, + http2cipher_TLS_KRB5_EXPORT_WITH_RC4_40_SHA, + http2cipher_TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5, + http2cipher_TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5, + http2cipher_TLS_KRB5_EXPORT_WITH_RC4_40_MD5, + http2cipher_TLS_PSK_WITH_NULL_SHA, + http2cipher_TLS_DHE_PSK_WITH_NULL_SHA, + http2cipher_TLS_RSA_PSK_WITH_NULL_SHA, + http2cipher_TLS_RSA_WITH_AES_128_CBC_SHA, + http2cipher_TLS_DH_DSS_WITH_AES_128_CBC_SHA, + http2cipher_TLS_DH_RSA_WITH_AES_128_CBC_SHA, + http2cipher_TLS_DHE_DSS_WITH_AES_128_CBC_SHA, + http2cipher_TLS_DHE_RSA_WITH_AES_128_CBC_SHA, + http2cipher_TLS_DH_anon_WITH_AES_128_CBC_SHA, + http2cipher_TLS_RSA_WITH_AES_256_CBC_SHA, + http2cipher_TLS_DH_DSS_WITH_AES_256_CBC_SHA, + http2cipher_TLS_DH_RSA_WITH_AES_256_CBC_SHA, + http2cipher_TLS_DHE_DSS_WITH_AES_256_CBC_SHA, + http2cipher_TLS_DHE_RSA_WITH_AES_256_CBC_SHA, + http2cipher_TLS_DH_anon_WITH_AES_256_CBC_SHA, + http2cipher_TLS_RSA_WITH_NULL_SHA256, + http2cipher_TLS_RSA_WITH_AES_128_CBC_SHA256, + http2cipher_TLS_RSA_WITH_AES_256_CBC_SHA256, + http2cipher_TLS_DH_DSS_WITH_AES_128_CBC_SHA256, + http2cipher_TLS_DH_RSA_WITH_AES_128_CBC_SHA256, + http2cipher_TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, + http2cipher_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA, + http2cipher_TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA, + http2cipher_TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA, + http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA, + http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA, + http2cipher_TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA, + http2cipher_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, + http2cipher_TLS_DH_DSS_WITH_AES_256_CBC_SHA256, + http2cipher_TLS_DH_RSA_WITH_AES_256_CBC_SHA256, + http2cipher_TLS_DHE_DSS_WITH_AES_256_CBC_SHA256, + http2cipher_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, + http2cipher_TLS_DH_anon_WITH_AES_128_CBC_SHA256, + http2cipher_TLS_DH_anon_WITH_AES_256_CBC_SHA256, + http2cipher_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA, + http2cipher_TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA, + http2cipher_TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA, + http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA, + http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA, + http2cipher_TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA, + http2cipher_TLS_PSK_WITH_RC4_128_SHA, + http2cipher_TLS_PSK_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_PSK_WITH_AES_128_CBC_SHA, + http2cipher_TLS_PSK_WITH_AES_256_CBC_SHA, + http2cipher_TLS_DHE_PSK_WITH_RC4_128_SHA, + http2cipher_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_DHE_PSK_WITH_AES_128_CBC_SHA, + http2cipher_TLS_DHE_PSK_WITH_AES_256_CBC_SHA, + http2cipher_TLS_RSA_PSK_WITH_RC4_128_SHA, + http2cipher_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_RSA_PSK_WITH_AES_128_CBC_SHA, + http2cipher_TLS_RSA_PSK_WITH_AES_256_CBC_SHA, + http2cipher_TLS_RSA_WITH_SEED_CBC_SHA, + http2cipher_TLS_DH_DSS_WITH_SEED_CBC_SHA, + http2cipher_TLS_DH_RSA_WITH_SEED_CBC_SHA, + http2cipher_TLS_DHE_DSS_WITH_SEED_CBC_SHA, + http2cipher_TLS_DHE_RSA_WITH_SEED_CBC_SHA, + http2cipher_TLS_DH_anon_WITH_SEED_CBC_SHA, + http2cipher_TLS_RSA_WITH_AES_128_GCM_SHA256, + http2cipher_TLS_RSA_WITH_AES_256_GCM_SHA384, + http2cipher_TLS_DH_RSA_WITH_AES_128_GCM_SHA256, + http2cipher_TLS_DH_RSA_WITH_AES_256_GCM_SHA384, + http2cipher_TLS_DH_DSS_WITH_AES_128_GCM_SHA256, + http2cipher_TLS_DH_DSS_WITH_AES_256_GCM_SHA384, + http2cipher_TLS_DH_anon_WITH_AES_128_GCM_SHA256, + http2cipher_TLS_DH_anon_WITH_AES_256_GCM_SHA384, + http2cipher_TLS_PSK_WITH_AES_128_GCM_SHA256, + http2cipher_TLS_PSK_WITH_AES_256_GCM_SHA384, + http2cipher_TLS_RSA_PSK_WITH_AES_128_GCM_SHA256, + http2cipher_TLS_RSA_PSK_WITH_AES_256_GCM_SHA384, + http2cipher_TLS_PSK_WITH_AES_128_CBC_SHA256, + http2cipher_TLS_PSK_WITH_AES_256_CBC_SHA384, + http2cipher_TLS_PSK_WITH_NULL_SHA256, + http2cipher_TLS_PSK_WITH_NULL_SHA384, + http2cipher_TLS_DHE_PSK_WITH_AES_128_CBC_SHA256, + http2cipher_TLS_DHE_PSK_WITH_AES_256_CBC_SHA384, + http2cipher_TLS_DHE_PSK_WITH_NULL_SHA256, + http2cipher_TLS_DHE_PSK_WITH_NULL_SHA384, + http2cipher_TLS_RSA_PSK_WITH_AES_128_CBC_SHA256, + http2cipher_TLS_RSA_PSK_WITH_AES_256_CBC_SHA384, + http2cipher_TLS_RSA_PSK_WITH_NULL_SHA256, + http2cipher_TLS_RSA_PSK_WITH_NULL_SHA384, + http2cipher_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256, + http2cipher_TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256, + http2cipher_TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256, + http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256, + http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256, + http2cipher_TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256, + http2cipher_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256, + http2cipher_TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256, + http2cipher_TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256, + http2cipher_TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256, + http2cipher_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256, + http2cipher_TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256, + http2cipher_TLS_EMPTY_RENEGOTIATION_INFO_SCSV, + http2cipher_TLS_ECDH_ECDSA_WITH_NULL_SHA, + http2cipher_TLS_ECDH_ECDSA_WITH_RC4_128_SHA, + http2cipher_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, + http2cipher_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, + http2cipher_TLS_ECDHE_ECDSA_WITH_NULL_SHA, + http2cipher_TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, + http2cipher_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + http2cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + http2cipher_TLS_ECDH_RSA_WITH_NULL_SHA, + http2cipher_TLS_ECDH_RSA_WITH_RC4_128_SHA, + http2cipher_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, + http2cipher_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, + http2cipher_TLS_ECDHE_RSA_WITH_NULL_SHA, + http2cipher_TLS_ECDHE_RSA_WITH_RC4_128_SHA, + http2cipher_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + http2cipher_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + http2cipher_TLS_ECDH_anon_WITH_NULL_SHA, + http2cipher_TLS_ECDH_anon_WITH_RC4_128_SHA, + http2cipher_TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_ECDH_anon_WITH_AES_128_CBC_SHA, + http2cipher_TLS_ECDH_anon_WITH_AES_256_CBC_SHA, + http2cipher_TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_SRP_SHA_WITH_AES_128_CBC_SHA, + http2cipher_TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA, + http2cipher_TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA, + http2cipher_TLS_SRP_SHA_WITH_AES_256_CBC_SHA, + http2cipher_TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA, + http2cipher_TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA, + http2cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + http2cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, + http2cipher_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, + http2cipher_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384, + http2cipher_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + http2cipher_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, + http2cipher_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, + http2cipher_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384, + http2cipher_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, + http2cipher_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384, + http2cipher_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, + http2cipher_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384, + http2cipher_TLS_ECDHE_PSK_WITH_RC4_128_SHA, + http2cipher_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA, + http2cipher_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA, + http2cipher_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA, + http2cipher_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256, + http2cipher_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384, + http2cipher_TLS_ECDHE_PSK_WITH_NULL_SHA, + http2cipher_TLS_ECDHE_PSK_WITH_NULL_SHA256, + http2cipher_TLS_ECDHE_PSK_WITH_NULL_SHA384, + http2cipher_TLS_RSA_WITH_ARIA_128_CBC_SHA256, + http2cipher_TLS_RSA_WITH_ARIA_256_CBC_SHA384, + http2cipher_TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256, + http2cipher_TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384, + http2cipher_TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256, + http2cipher_TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384, + http2cipher_TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256, + http2cipher_TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384, + http2cipher_TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256, + http2cipher_TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384, + http2cipher_TLS_DH_anon_WITH_ARIA_128_CBC_SHA256, + http2cipher_TLS_DH_anon_WITH_ARIA_256_CBC_SHA384, + http2cipher_TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256, + http2cipher_TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384, + http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256, + http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384, + http2cipher_TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256, + http2cipher_TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384, + http2cipher_TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256, + http2cipher_TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384, + http2cipher_TLS_RSA_WITH_ARIA_128_GCM_SHA256, + http2cipher_TLS_RSA_WITH_ARIA_256_GCM_SHA384, + http2cipher_TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256, + http2cipher_TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384, + http2cipher_TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256, + http2cipher_TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384, + http2cipher_TLS_DH_anon_WITH_ARIA_128_GCM_SHA256, + http2cipher_TLS_DH_anon_WITH_ARIA_256_GCM_SHA384, + http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256, + http2cipher_TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384, + http2cipher_TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256, + http2cipher_TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384, + http2cipher_TLS_PSK_WITH_ARIA_128_CBC_SHA256, + http2cipher_TLS_PSK_WITH_ARIA_256_CBC_SHA384, + http2cipher_TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256, + http2cipher_TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384, + http2cipher_TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256, + http2cipher_TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384, + http2cipher_TLS_PSK_WITH_ARIA_128_GCM_SHA256, + http2cipher_TLS_PSK_WITH_ARIA_256_GCM_SHA384, + http2cipher_TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256, + http2cipher_TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384, + http2cipher_TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256, + http2cipher_TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384, + http2cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256, + http2cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384, + http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256, + http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384, + http2cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256, + http2cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384, + http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256, + http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384, + http2cipher_TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256, + http2cipher_TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384, + http2cipher_TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256, + http2cipher_TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384, + http2cipher_TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256, + http2cipher_TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384, + http2cipher_TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256, + http2cipher_TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384, + http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256, + http2cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384, + http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256, + http2cipher_TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384, + http2cipher_TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256, + http2cipher_TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384, + http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256, + http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384, + http2cipher_TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256, + http2cipher_TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384, + http2cipher_TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256, + http2cipher_TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384, + http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256, + http2cipher_TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384, + http2cipher_TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256, + http2cipher_TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384, + http2cipher_TLS_RSA_WITH_AES_128_CCM, + http2cipher_TLS_RSA_WITH_AES_256_CCM, + http2cipher_TLS_RSA_WITH_AES_128_CCM_8, + http2cipher_TLS_RSA_WITH_AES_256_CCM_8, + http2cipher_TLS_PSK_WITH_AES_128_CCM, + http2cipher_TLS_PSK_WITH_AES_256_CCM, + http2cipher_TLS_PSK_WITH_AES_128_CCM_8, + http2cipher_TLS_PSK_WITH_AES_256_CCM_8: + return true + default: + return false + } +} + +// ClientConnPool manages a pool of HTTP/2 client connections. +type http2ClientConnPool interface { + // GetClientConn returns a specific HTTP/2 connection (usually + // a TLS-TCP connection) to an HTTP/2 server. On success, the + // returned ClientConn accounts for the upcoming RoundTrip + // call, so the caller should not omit it. If the caller needs + // to, ClientConn.RoundTrip can be called with a bogus + // new(http.Request) to release the stream reservation. + GetClientConn(req *Request, addr string) (*http2ClientConn, error) + MarkDead(*http2ClientConn) +} + +// clientConnPoolIdleCloser is the interface implemented by ClientConnPool +// implementations which can close their idle connections. +type http2clientConnPoolIdleCloser interface { + http2ClientConnPool + closeIdleConnections() +} + +var ( + _ http2clientConnPoolIdleCloser = (*http2clientConnPool)(nil) + _ http2clientConnPoolIdleCloser = http2noDialClientConnPool{} +) + +// TODO: use singleflight for dialing and addConnCalls? +type http2clientConnPool struct { + t *http2Transport + + mu sync.Mutex // TODO: maybe switch to RWMutex + // TODO: add support for sharing conns based on cert names + // (e.g. share conn for googleapis.com and appspot.com) + conns map[string][]*http2ClientConn // key is host:port + dialing map[string]*http2dialCall // currently in-flight dials + keys map[*http2ClientConn][]string + addConnCalls map[string]*http2addConnCall // in-flight addConnIfNeeded calls +} + +func (p *http2clientConnPool) GetClientConn(req *Request, addr string) (*http2ClientConn, error) { + return p.getClientConn(req, addr, http2dialOnMiss) +} + +const ( + http2dialOnMiss = true + http2noDialOnMiss = false +) + +func (p *http2clientConnPool) getClientConn(req *Request, addr string, dialOnMiss bool) (*http2ClientConn, error) { + // TODO(dneil): Dial a new connection when t.DisableKeepAlives is set? + if http2isConnectionCloseRequest(req) && dialOnMiss { + // It gets its own connection. + http2traceGetConn(req, addr) + const singleUse = true + cc, err := p.t.dialClientConn(req.Context(), addr, singleUse) + if err != nil { + return nil, err + } + return cc, nil + } + for { + p.mu.Lock() + for _, cc := range p.conns[addr] { + if cc.ReserveNewRequest() { + // When a connection is presented to us by the net/http package, + // the GetConn hook has already been called. + // Don't call it a second time here. + if !cc.getConnCalled { + http2traceGetConn(req, addr) + } + cc.getConnCalled = false + p.mu.Unlock() + return cc, nil + } + } + if !dialOnMiss { + p.mu.Unlock() + return nil, http2ErrNoCachedConn + } + http2traceGetConn(req, addr) + call := p.getStartDialLocked(req.Context(), addr) + p.mu.Unlock() + <-call.done + if http2shouldRetryDial(call, req) { + continue + } + cc, err := call.res, call.err + if err != nil { + return nil, err + } + if cc.ReserveNewRequest() { + return cc, nil + } + } +} + +// dialCall is an in-flight Transport dial call to a host. +type http2dialCall struct { + _ http2incomparable + p *http2clientConnPool + // the context associated with the request + // that created this dialCall + ctx context.Context + done chan struct{} // closed when done + res *http2ClientConn // valid after done is closed + err error // valid after done is closed +} + +// requires p.mu is held. +func (p *http2clientConnPool) getStartDialLocked(ctx context.Context, addr string) *http2dialCall { + if call, ok := p.dialing[addr]; ok { + // A dial is already in-flight. Don't start another. + return call + } + call := &http2dialCall{p: p, done: make(chan struct{}), ctx: ctx} + if p.dialing == nil { + p.dialing = make(map[string]*http2dialCall) + } + p.dialing[addr] = call + go call.dial(call.ctx, addr) + return call +} + +// run in its own goroutine. +func (c *http2dialCall) dial(ctx context.Context, addr string) { + const singleUse = false // shared conn + c.res, c.err = c.p.t.dialClientConn(ctx, addr, singleUse) + + c.p.mu.Lock() + delete(c.p.dialing, addr) + if c.err == nil { + c.p.addConnLocked(addr, c.res) + } + c.p.mu.Unlock() + + close(c.done) +} + +// addConnIfNeeded makes a NewClientConn out of c if a connection for key doesn't +// already exist. It coalesces concurrent calls with the same key. +// This is used by the http1 Transport code when it creates a new connection. Because +// the http1 Transport doesn't de-dup TCP dials to outbound hosts (because it doesn't know +// the protocol), it can get into a situation where it has multiple TLS connections. +// This code decides which ones live or die. +// The return value used is whether c was used. +// c is never closed. +func (p *http2clientConnPool) addConnIfNeeded(key string, t *http2Transport, c net.Conn) (used bool, err error) { + p.mu.Lock() + for _, cc := range p.conns[key] { + if cc.CanTakeNewRequest() { + p.mu.Unlock() + return false, nil + } + } + call, dup := p.addConnCalls[key] + if !dup { + if p.addConnCalls == nil { + p.addConnCalls = make(map[string]*http2addConnCall) + } + call = &http2addConnCall{ + p: p, + done: make(chan struct{}), + } + p.addConnCalls[key] = call + go call.run(t, key, c) + } + p.mu.Unlock() + + <-call.done + if call.err != nil { + return false, call.err + } + return !dup, nil +} + +type http2addConnCall struct { + _ http2incomparable + p *http2clientConnPool + done chan struct{} // closed when done + err error +} + +func (c *http2addConnCall) run(t *http2Transport, key string, nc net.Conn) { + cc, err := t.NewClientConn(nc) + + p := c.p + p.mu.Lock() + if err != nil { + c.err = err + } else { + cc.getConnCalled = true // already called by the net/http package + p.addConnLocked(key, cc) + } + delete(p.addConnCalls, key) + p.mu.Unlock() + close(c.done) +} + +// p.mu must be held +func (p *http2clientConnPool) addConnLocked(key string, cc *http2ClientConn) { + for _, v := range p.conns[key] { + if v == cc { + return + } + } + if p.conns == nil { + p.conns = make(map[string][]*http2ClientConn) + } + if p.keys == nil { + p.keys = make(map[*http2ClientConn][]string) + } + p.conns[key] = append(p.conns[key], cc) + p.keys[cc] = append(p.keys[cc], key) +} + +func (p *http2clientConnPool) MarkDead(cc *http2ClientConn) { + p.mu.Lock() + defer p.mu.Unlock() + for _, key := range p.keys[cc] { + vv, ok := p.conns[key] + if !ok { + continue + } + newList := http2filterOutClientConn(vv, cc) + if len(newList) > 0 { + p.conns[key] = newList + } else { + delete(p.conns, key) + } + } + delete(p.keys, cc) +} + +func (p *http2clientConnPool) closeIdleConnections() { + p.mu.Lock() + defer p.mu.Unlock() + // TODO: don't close a cc if it was just added to the pool + // milliseconds ago and has never been used. There's currently + // a small race window with the HTTP/1 Transport's integration + // where it can add an idle conn just before using it, and + // somebody else can concurrently call CloseIdleConns and + // break some caller's RoundTrip. + for _, vv := range p.conns { + for _, cc := range vv { + cc.closeIfIdle() + } + } +} + +func http2filterOutClientConn(in []*http2ClientConn, exclude *http2ClientConn) []*http2ClientConn { + out := in[:0] + for _, v := range in { + if v != exclude { + out = append(out, v) + } + } + // If we filtered it out, zero out the last item to prevent + // the GC from seeing it. + if len(in) != len(out) { + in[len(in)-1] = nil + } + return out +} + +// noDialClientConnPool is an implementation of http2.ClientConnPool +// which never dials. We let the HTTP/1.1 client dial and use its TLS +// connection instead. +type http2noDialClientConnPool struct{ *http2clientConnPool } + +func (p http2noDialClientConnPool) GetClientConn(req *Request, addr string) (*http2ClientConn, error) { + return p.getClientConn(req, addr, http2noDialOnMiss) +} + +// shouldRetryDial reports whether the current request should +// retry dialing after the call finished unsuccessfully, for example +// if the dial was canceled because of a context cancellation or +// deadline expiry. +func http2shouldRetryDial(call *http2dialCall, req *Request) bool { + if call.err == nil { + // No error, no need to retry + return false + } + if call.ctx == req.Context() { + // If the call has the same context as the request, the dial + // should not be retried, since any cancellation will have come + // from this request. + return false + } + if !errors.Is(call.err, context.Canceled) && !errors.Is(call.err, context.DeadlineExceeded) { + // If the call error is not because of a context cancellation or a deadline expiry, + // the dial should not be retried. + return false + } + // Only retry if the error is a context cancellation error or deadline expiry + // and the context associated with the call was canceled or expired. + return call.ctx.Err() != nil +} + +// http2Config is a package-internal version of net/http.HTTP2Config. +// +// http.HTTP2Config was added in Go 1.24. +// When running with a version of net/http that includes HTTP2Config, +// we merge the configuration with the fields in Transport or Server +// to produce an http2Config. +// +// Zero valued fields in http2Config are interpreted as in the +// net/http.HTTPConfig documentation. +// +// Precedence order for reconciling configurations is: +// +// - Use the net/http.{Server,Transport}.HTTP2Config value, when non-zero. +// - Otherwise use the http2.{Server.Transport} value. +// - If the resulting value is zero or out of range, use a default. +type http2http2Config struct { + MaxConcurrentStreams uint32 + StrictMaxConcurrentRequests bool + MaxDecoderHeaderTableSize uint32 + MaxEncoderHeaderTableSize uint32 + MaxReadFrameSize uint32 + MaxUploadBufferPerConnection int32 + MaxUploadBufferPerStream int32 + SendPingTimeout time.Duration + PingTimeout time.Duration + WriteByteTimeout time.Duration + PermitProhibitedCipherSuites bool + CountError func(errType string) +} + +// configFromServer merges configuration settings from +// net/http.Server.HTTP2Config and http2.Server. +func http2configFromServer(h1 *Server, h2 *http2Server) http2http2Config { + conf := http2http2Config{ + MaxConcurrentStreams: h2.MaxConcurrentStreams, + MaxEncoderHeaderTableSize: h2.MaxEncoderHeaderTableSize, + MaxDecoderHeaderTableSize: h2.MaxDecoderHeaderTableSize, + MaxReadFrameSize: h2.MaxReadFrameSize, + MaxUploadBufferPerConnection: h2.MaxUploadBufferPerConnection, + MaxUploadBufferPerStream: h2.MaxUploadBufferPerStream, + SendPingTimeout: h2.ReadIdleTimeout, + PingTimeout: h2.PingTimeout, + WriteByteTimeout: h2.WriteByteTimeout, + PermitProhibitedCipherSuites: h2.PermitProhibitedCipherSuites, + CountError: h2.CountError, + } + http2fillNetHTTPConfig(&conf, h1.HTTP2) + http2setConfigDefaults(&conf, true) + return conf +} + +// configFromTransport merges configuration settings from h2 and h2.t1.HTTP2 +// (the net/http Transport). +func http2configFromTransport(h2 *http2Transport) http2http2Config { + conf := http2http2Config{ + StrictMaxConcurrentRequests: h2.StrictMaxConcurrentStreams, + MaxEncoderHeaderTableSize: h2.MaxEncoderHeaderTableSize, + MaxDecoderHeaderTableSize: h2.MaxDecoderHeaderTableSize, + MaxReadFrameSize: h2.MaxReadFrameSize, + SendPingTimeout: h2.ReadIdleTimeout, + PingTimeout: h2.PingTimeout, + WriteByteTimeout: h2.WriteByteTimeout, + } + + // Unlike most config fields, where out-of-range values revert to the default, + // Transport.MaxReadFrameSize clips. + if conf.MaxReadFrameSize < http2minMaxFrameSize { + conf.MaxReadFrameSize = http2minMaxFrameSize + } else if conf.MaxReadFrameSize > http2maxFrameSize { + conf.MaxReadFrameSize = http2maxFrameSize + } + + if h2.t1 != nil { + http2fillNetHTTPConfig(&conf, h2.t1.HTTP2) + } + http2setConfigDefaults(&conf, false) + return conf +} + +func http2setDefault[T ~int | ~int32 | ~uint32 | ~int64](v *T, minval, maxval, defval T) { + if *v < minval || *v > maxval { + *v = defval + } +} + +func http2setConfigDefaults(conf *http2http2Config, server bool) { + http2setDefault(&conf.MaxConcurrentStreams, 1, math.MaxUint32, http2defaultMaxStreams) + http2setDefault(&conf.MaxEncoderHeaderTableSize, 1, math.MaxUint32, http2initialHeaderTableSize) + http2setDefault(&conf.MaxDecoderHeaderTableSize, 1, math.MaxUint32, http2initialHeaderTableSize) + if server { + http2setDefault(&conf.MaxUploadBufferPerConnection, http2initialWindowSize, math.MaxInt32, 1<<20) + } else { + http2setDefault(&conf.MaxUploadBufferPerConnection, http2initialWindowSize, math.MaxInt32, http2transportDefaultConnFlow) + } + if server { + http2setDefault(&conf.MaxUploadBufferPerStream, 1, math.MaxInt32, 1<<20) + } else { + http2setDefault(&conf.MaxUploadBufferPerStream, 1, math.MaxInt32, http2transportDefaultStreamFlow) + } + http2setDefault(&conf.MaxReadFrameSize, http2minMaxFrameSize, http2maxFrameSize, http2defaultMaxReadFrameSize) + http2setDefault(&conf.PingTimeout, 1, math.MaxInt64, 15*time.Second) +} + +// adjustHTTP1MaxHeaderSize converts a limit in bytes on the size of an HTTP/1 header +// to an HTTP/2 MAX_HEADER_LIST_SIZE value. +func http2adjustHTTP1MaxHeaderSize(n int64) int64 { + // http2's count is in a slightly different unit and includes 32 bytes per pair. + // So, take the net/http.Server value and pad it up a bit, assuming 10 headers. + const perFieldOverhead = 32 // per http2 spec + const typicalHeaders = 10 // conservative + return n + typicalHeaders*perFieldOverhead +} + +func http2fillNetHTTPConfig(conf *http2http2Config, h2 *HTTP2Config) { + if h2 == nil { + return + } + if h2.MaxConcurrentStreams != 0 { + conf.MaxConcurrentStreams = uint32(h2.MaxConcurrentStreams) + } + if http2http2ConfigStrictMaxConcurrentRequests(h2) { + conf.StrictMaxConcurrentRequests = true + } + if h2.MaxEncoderHeaderTableSize != 0 { + conf.MaxEncoderHeaderTableSize = uint32(h2.MaxEncoderHeaderTableSize) + } + if h2.MaxDecoderHeaderTableSize != 0 { + conf.MaxDecoderHeaderTableSize = uint32(h2.MaxDecoderHeaderTableSize) + } + if h2.MaxConcurrentStreams != 0 { + conf.MaxConcurrentStreams = uint32(h2.MaxConcurrentStreams) + } + if h2.MaxReadFrameSize != 0 { + conf.MaxReadFrameSize = uint32(h2.MaxReadFrameSize) + } + if h2.MaxReceiveBufferPerConnection != 0 { + conf.MaxUploadBufferPerConnection = int32(h2.MaxReceiveBufferPerConnection) + } + if h2.MaxReceiveBufferPerStream != 0 { + conf.MaxUploadBufferPerStream = int32(h2.MaxReceiveBufferPerStream) + } + if h2.SendPingTimeout != 0 { + conf.SendPingTimeout = h2.SendPingTimeout + } + if h2.PingTimeout != 0 { + conf.PingTimeout = h2.PingTimeout + } + if h2.WriteByteTimeout != 0 { + conf.WriteByteTimeout = h2.WriteByteTimeout + } + if h2.PermitProhibitedCipherSuites { + conf.PermitProhibitedCipherSuites = true + } + if h2.CountError != nil { + conf.CountError = h2.CountError + } +} + +func http2http2ConfigStrictMaxConcurrentRequests(h2 *HTTP2Config) bool { + return false +} + +// Buffer chunks are allocated from a pool to reduce pressure on GC. +// The maximum wasted space per dataBuffer is 2x the largest size class, +// which happens when the dataBuffer has multiple chunks and there is +// one unread byte in both the first and last chunks. We use a few size +// classes to minimize overheads for servers that typically receive very +// small request bodies. +// +// TODO: Benchmark to determine if the pools are necessary. The GC may have +// improved enough that we can instead allocate chunks like this: +// make([]byte, max(16<<10, expectedBytesRemaining)) +var http2dataChunkPools = [...]sync.Pool{ + {New: func() interface{} { return new([1 << 10]byte) }}, + {New: func() interface{} { return new([2 << 10]byte) }}, + {New: func() interface{} { return new([4 << 10]byte) }}, + {New: func() interface{} { return new([8 << 10]byte) }}, + {New: func() interface{} { return new([16 << 10]byte) }}, +} + +func http2getDataBufferChunk(size int64) []byte { + switch { + case size <= 1<<10: + return http2dataChunkPools[0].Get().(*[1 << 10]byte)[:] + case size <= 2<<10: + return http2dataChunkPools[1].Get().(*[2 << 10]byte)[:] + case size <= 4<<10: + return http2dataChunkPools[2].Get().(*[4 << 10]byte)[:] + case size <= 8<<10: + return http2dataChunkPools[3].Get().(*[8 << 10]byte)[:] + default: + return http2dataChunkPools[4].Get().(*[16 << 10]byte)[:] + } +} + +func http2putDataBufferChunk(p []byte) { + switch len(p) { + case 1 << 10: + http2dataChunkPools[0].Put((*[1 << 10]byte)(p)) + case 2 << 10: + http2dataChunkPools[1].Put((*[2 << 10]byte)(p)) + case 4 << 10: + http2dataChunkPools[2].Put((*[4 << 10]byte)(p)) + case 8 << 10: + http2dataChunkPools[3].Put((*[8 << 10]byte)(p)) + case 16 << 10: + http2dataChunkPools[4].Put((*[16 << 10]byte)(p)) + default: + panic(fmt.Sprintf("unexpected buffer len=%v", len(p))) + } +} + +// dataBuffer is an io.ReadWriter backed by a list of data chunks. +// Each dataBuffer is used to read DATA frames on a single stream. +// The buffer is divided into chunks so the server can limit the +// total memory used by a single connection without limiting the +// request body size on any single stream. +type http2dataBuffer struct { + chunks [][]byte + r int // next byte to read is chunks[0][r] + w int // next byte to write is chunks[len(chunks)-1][w] + size int // total buffered bytes + expected int64 // we expect at least this many bytes in future Write calls (ignored if <= 0) +} + +var http2errReadEmpty = errors.New("read from empty dataBuffer") + +// Read copies bytes from the buffer into p. +// It is an error to read when no data is available. +func (b *http2dataBuffer) Read(p []byte) (int, error) { + if b.size == 0 { + return 0, http2errReadEmpty + } + var ntotal int + for len(p) > 0 && b.size > 0 { + readFrom := b.bytesFromFirstChunk() + n := copy(p, readFrom) + p = p[n:] + ntotal += n + b.r += n + b.size -= n + // If the first chunk has been consumed, advance to the next chunk. + if b.r == len(b.chunks[0]) { + http2putDataBufferChunk(b.chunks[0]) + end := len(b.chunks) - 1 + copy(b.chunks[:end], b.chunks[1:]) + b.chunks[end] = nil + b.chunks = b.chunks[:end] + b.r = 0 + } + } + return ntotal, nil +} + +func (b *http2dataBuffer) bytesFromFirstChunk() []byte { + if len(b.chunks) == 1 { + return b.chunks[0][b.r:b.w] + } + return b.chunks[0][b.r:] +} + +// Len returns the number of bytes of the unread portion of the buffer. +func (b *http2dataBuffer) Len() int { + return b.size +} + +// Write appends p to the buffer. +func (b *http2dataBuffer) Write(p []byte) (int, error) { + ntotal := len(p) + for len(p) > 0 { + // If the last chunk is empty, allocate a new chunk. Try to allocate + // enough to fully copy p plus any additional bytes we expect to + // receive. However, this may allocate less than len(p). + want := int64(len(p)) + if b.expected > want { + want = b.expected + } + chunk := b.lastChunkOrAlloc(want) + n := copy(chunk[b.w:], p) + p = p[n:] + b.w += n + b.size += n + b.expected -= int64(n) + } + return ntotal, nil +} + +func (b *http2dataBuffer) lastChunkOrAlloc(want int64) []byte { + if len(b.chunks) != 0 { + last := b.chunks[len(b.chunks)-1] + if b.w < len(last) { + return last + } + } + chunk := http2getDataBufferChunk(want) + b.chunks = append(b.chunks, chunk) + b.w = 0 + return chunk +} + +// An ErrCode is an unsigned 32-bit error code as defined in the HTTP/2 spec. +type http2ErrCode uint32 + +const ( + http2ErrCodeNo http2ErrCode = 0x0 + http2ErrCodeProtocol http2ErrCode = 0x1 + http2ErrCodeInternal http2ErrCode = 0x2 + http2ErrCodeFlowControl http2ErrCode = 0x3 + http2ErrCodeSettingsTimeout http2ErrCode = 0x4 + http2ErrCodeStreamClosed http2ErrCode = 0x5 + http2ErrCodeFrameSize http2ErrCode = 0x6 + http2ErrCodeRefusedStream http2ErrCode = 0x7 + http2ErrCodeCancel http2ErrCode = 0x8 + http2ErrCodeCompression http2ErrCode = 0x9 + http2ErrCodeConnect http2ErrCode = 0xa + http2ErrCodeEnhanceYourCalm http2ErrCode = 0xb + http2ErrCodeInadequateSecurity http2ErrCode = 0xc + http2ErrCodeHTTP11Required http2ErrCode = 0xd +) + +var http2errCodeName = map[http2ErrCode]string{ + http2ErrCodeNo: "NO_ERROR", + http2ErrCodeProtocol: "PROTOCOL_ERROR", + http2ErrCodeInternal: "INTERNAL_ERROR", + http2ErrCodeFlowControl: "FLOW_CONTROL_ERROR", + http2ErrCodeSettingsTimeout: "SETTINGS_TIMEOUT", + http2ErrCodeStreamClosed: "STREAM_CLOSED", + http2ErrCodeFrameSize: "FRAME_SIZE_ERROR", + http2ErrCodeRefusedStream: "REFUSED_STREAM", + http2ErrCodeCancel: "CANCEL", + http2ErrCodeCompression: "COMPRESSION_ERROR", + http2ErrCodeConnect: "CONNECT_ERROR", + http2ErrCodeEnhanceYourCalm: "ENHANCE_YOUR_CALM", + http2ErrCodeInadequateSecurity: "INADEQUATE_SECURITY", + http2ErrCodeHTTP11Required: "HTTP_1_1_REQUIRED", +} + +func (e http2ErrCode) String() string { + if s, ok := http2errCodeName[e]; ok { + return s + } + return fmt.Sprintf("unknown error code 0x%x", uint32(e)) +} + +func (e http2ErrCode) stringToken() string { + if s, ok := http2errCodeName[e]; ok { + return s + } + return fmt.Sprintf("ERR_UNKNOWN_%d", uint32(e)) +} + +// ConnectionError is an error that results in the termination of the +// entire connection. +type http2ConnectionError http2ErrCode + +func (e http2ConnectionError) Error() string { + return fmt.Sprintf("connection error: %s", http2ErrCode(e)) +} + +// StreamError is an error that only affects one stream within an +// HTTP/2 connection. +type http2StreamError struct { + StreamID uint32 + Code http2ErrCode + Cause error // optional additional detail +} + +// errFromPeer is a sentinel error value for StreamError.Cause to +// indicate that the StreamError was sent from the peer over the wire +// and wasn't locally generated in the Transport. +var http2errFromPeer = errors.New("received from peer") + +func http2streamError(id uint32, code http2ErrCode) http2StreamError { + return http2StreamError{StreamID: id, Code: code} +} + +func (e http2StreamError) Error() string { + if e.Cause != nil { + return fmt.Sprintf("stream error: stream ID %d; %v; %v", e.StreamID, e.Code, e.Cause) + } + return fmt.Sprintf("stream error: stream ID %d; %v", e.StreamID, e.Code) +} + +// 6.9.1 The Flow Control Window +// "If a sender receives a WINDOW_UPDATE that causes a flow control +// window to exceed this maximum it MUST terminate either the stream +// or the connection, as appropriate. For streams, [...]; for the +// connection, a GOAWAY frame with a FLOW_CONTROL_ERROR code." +type http2goAwayFlowError struct{} + +func (http2goAwayFlowError) Error() string { return "connection exceeded flow control window size" } + +// connError represents an HTTP/2 ConnectionError error code, along +// with a string (for debugging) explaining why. +// +// Errors of this type are only returned by the frame parser functions +// and converted into ConnectionError(Code), after stashing away +// the Reason into the Framer's errDetail field, accessible via +// the (*Framer).ErrorDetail method. +type http2connError struct { + Code http2ErrCode // the ConnectionError error code + Reason string // additional reason +} + +func (e http2connError) Error() string { + return fmt.Sprintf("http2: connection error: %v: %v", e.Code, e.Reason) +} + +type http2pseudoHeaderError string + +func (e http2pseudoHeaderError) Error() string { + return fmt.Sprintf("invalid pseudo-header %q", string(e)) +} + +type http2duplicatePseudoHeaderError string + +func (e http2duplicatePseudoHeaderError) Error() string { + return fmt.Sprintf("duplicate pseudo-header %q", string(e)) +} + +type http2headerFieldNameError string + +func (e http2headerFieldNameError) Error() string { + return fmt.Sprintf("invalid header field name %q", string(e)) +} + +type http2headerFieldValueError string + +func (e http2headerFieldValueError) Error() string { + return fmt.Sprintf("invalid header field value for %q", string(e)) +} + +var ( + http2errMixPseudoHeaderTypes = errors.New("mix of request and response pseudo headers") + http2errPseudoAfterRegular = errors.New("pseudo header field after regular") +) + +// inflowMinRefresh is the minimum number of bytes we'll send for a +// flow control window update. +const http2inflowMinRefresh = 4 << 10 + +// inflow accounts for an inbound flow control window. +// It tracks both the latest window sent to the peer (used for enforcement) +// and the accumulated unsent window. +type http2inflow struct { + avail int32 + unsent int32 +} + +// init sets the initial window. +func (f *http2inflow) init(n int32) { + f.avail = n +} + +// add adds n bytes to the window, with a maximum window size of max, +// indicating that the peer can now send us more data. +// For example, the user read from a {Request,Response} body and consumed +// some of the buffered data, so the peer can now send more. +// It returns the number of bytes to send in a WINDOW_UPDATE frame to the peer. +// Window updates are accumulated and sent when the unsent capacity +// is at least inflowMinRefresh or will at least double the peer's available window. +func (f *http2inflow) add(n int) (connAdd int32) { + if n < 0 { + panic("negative update") + } + unsent := int64(f.unsent) + int64(n) + // "A sender MUST NOT allow a flow-control window to exceed 2^31-1 octets." + // RFC 7540 Section 6.9.1. + const maxWindow = 1<<31 - 1 + if unsent+int64(f.avail) > maxWindow { + panic("flow control update exceeds maximum window size") + } + f.unsent = int32(unsent) + if f.unsent < http2inflowMinRefresh && f.unsent < f.avail { + // If there aren't at least inflowMinRefresh bytes of window to send, + // and this update won't at least double the window, buffer the update for later. + return 0 + } + f.avail += f.unsent + f.unsent = 0 + return int32(unsent) +} + +// take attempts to take n bytes from the peer's flow control window. +// It reports whether the window has available capacity. +func (f *http2inflow) take(n uint32) bool { + if n > uint32(f.avail) { + return false + } + f.avail -= int32(n) + return true +} + +// takeInflows attempts to take n bytes from two inflows, +// typically connection-level and stream-level flows. +// It reports whether both windows have available capacity. +func http2takeInflows(f1, f2 *http2inflow, n uint32) bool { + if n > uint32(f1.avail) || n > uint32(f2.avail) { + return false + } + f1.avail -= int32(n) + f2.avail -= int32(n) + return true +} + +// outflow is the outbound flow control window's size. +type http2outflow struct { + _ http2incomparable + + // n is the number of DATA bytes we're allowed to send. + // An outflow is kept both on a conn and a per-stream. + n int32 + + // conn points to the shared connection-level outflow that is + // shared by all streams on that conn. It is nil for the outflow + // that's on the conn directly. + conn *http2outflow +} + +func (f *http2outflow) setConnFlow(cf *http2outflow) { f.conn = cf } + +func (f *http2outflow) available() int32 { + n := f.n + if f.conn != nil && f.conn.n < n { + n = f.conn.n + } + return n +} + +func (f *http2outflow) take(n int32) { + if n > f.available() { + panic("internal error: took too much") + } + f.n -= n + if f.conn != nil { + f.conn.n -= n + } +} + +// add adds n bytes (positive or negative) to the flow control window. +// It returns false if the sum would exceed 2^31-1. +func (f *http2outflow) add(n int32) bool { + sum := f.n + n + if (sum > n) == (f.n > 0) { + f.n = sum + return true + } + return false +} + +const http2frameHeaderLen = 9 + +var http2padZeros = make([]byte, 255) // zeros for padding + +// A FrameType is a registered frame type as defined in +// https://httpwg.org/specs/rfc7540.html#rfc.section.11.2 +type http2FrameType uint8 + +const ( + http2FrameData http2FrameType = 0x0 + http2FrameHeaders http2FrameType = 0x1 + http2FramePriority http2FrameType = 0x2 + http2FrameRSTStream http2FrameType = 0x3 + http2FrameSettings http2FrameType = 0x4 + http2FramePushPromise http2FrameType = 0x5 + http2FramePing http2FrameType = 0x6 + http2FrameGoAway http2FrameType = 0x7 + http2FrameWindowUpdate http2FrameType = 0x8 + http2FrameContinuation http2FrameType = 0x9 +) + +var http2frameNames = [...]string{ + http2FrameData: "DATA", + http2FrameHeaders: "HEADERS", + http2FramePriority: "PRIORITY", + http2FrameRSTStream: "RST_STREAM", + http2FrameSettings: "SETTINGS", + http2FramePushPromise: "PUSH_PROMISE", + http2FramePing: "PING", + http2FrameGoAway: "GOAWAY", + http2FrameWindowUpdate: "WINDOW_UPDATE", + http2FrameContinuation: "CONTINUATION", +} + +func (t http2FrameType) String() string { + if int(t) < len(http2frameNames) { + return http2frameNames[t] + } + return fmt.Sprintf("UNKNOWN_FRAME_TYPE_%d", t) +} + +// Flags is a bitmask of HTTP/2 flags. +// The meaning of flags varies depending on the frame type. +type http2Flags uint8 + +// Has reports whether f contains all (0 or more) flags in v. +func (f http2Flags) Has(v http2Flags) bool { + return (f & v) == v +} + +// Frame-specific FrameHeader flag bits. +const ( + // Data Frame + http2FlagDataEndStream http2Flags = 0x1 + http2FlagDataPadded http2Flags = 0x8 + + // Headers Frame + http2FlagHeadersEndStream http2Flags = 0x1 + http2FlagHeadersEndHeaders http2Flags = 0x4 + http2FlagHeadersPadded http2Flags = 0x8 + http2FlagHeadersPriority http2Flags = 0x20 + + // Settings Frame + http2FlagSettingsAck http2Flags = 0x1 + + // Ping Frame + http2FlagPingAck http2Flags = 0x1 + + // Continuation Frame + http2FlagContinuationEndHeaders http2Flags = 0x4 + + http2FlagPushPromiseEndHeaders http2Flags = 0x4 + http2FlagPushPromisePadded http2Flags = 0x8 +) + +var http2flagName = map[http2FrameType]map[http2Flags]string{ + http2FrameData: { + http2FlagDataEndStream: "END_STREAM", + http2FlagDataPadded: "PADDED", + }, + http2FrameHeaders: { + http2FlagHeadersEndStream: "END_STREAM", + http2FlagHeadersEndHeaders: "END_HEADERS", + http2FlagHeadersPadded: "PADDED", + http2FlagHeadersPriority: "PRIORITY", + }, + http2FrameSettings: { + http2FlagSettingsAck: "ACK", + }, + http2FramePing: { + http2FlagPingAck: "ACK", + }, + http2FrameContinuation: { + http2FlagContinuationEndHeaders: "END_HEADERS", + }, + http2FramePushPromise: { + http2FlagPushPromiseEndHeaders: "END_HEADERS", + http2FlagPushPromisePadded: "PADDED", + }, +} + +// a frameParser parses a frame given its FrameHeader and payload +// bytes. The length of payload will always equal fh.Length (which +// might be 0). +type http2frameParser func(fc *http2frameCache, fh http2FrameHeader, countError func(string), payload []byte) (http2Frame, error) + +var http2frameParsers = [...]http2frameParser{ + http2FrameData: http2parseDataFrame, + http2FrameHeaders: http2parseHeadersFrame, + http2FramePriority: http2parsePriorityFrame, + http2FrameRSTStream: http2parseRSTStreamFrame, + http2FrameSettings: http2parseSettingsFrame, + http2FramePushPromise: http2parsePushPromise, + http2FramePing: http2parsePingFrame, + http2FrameGoAway: http2parseGoAwayFrame, + http2FrameWindowUpdate: http2parseWindowUpdateFrame, + http2FrameContinuation: http2parseContinuationFrame, +} + +func http2typeFrameParser(t http2FrameType) http2frameParser { + if int(t) < len(http2frameParsers) { + return http2frameParsers[t] + } + return http2parseUnknownFrame +} + +// A FrameHeader is the 9 byte header of all HTTP/2 frames. +// +// See https://httpwg.org/specs/rfc7540.html#FrameHeader +type http2FrameHeader struct { + valid bool // caller can access []byte fields in the Frame + + // Type is the 1 byte frame type. There are ten standard frame + // types, but extension frame types may be written by WriteRawFrame + // and will be returned by ReadFrame (as UnknownFrame). + Type http2FrameType + + // Flags are the 1 byte of 8 potential bit flags per frame. + // They are specific to the frame type. + Flags http2Flags + + // Length is the length of the frame, not including the 9 byte header. + // The maximum size is one byte less than 16MB (uint24), but only + // frames up to 16KB are allowed without peer agreement. + Length uint32 + + // StreamID is which stream this frame is for. Certain frames + // are not stream-specific, in which case this field is 0. + StreamID uint32 +} + +// Header returns h. It exists so FrameHeaders can be embedded in other +// specific frame types and implement the Frame interface. +func (h http2FrameHeader) Header() http2FrameHeader { return h } + +func (h http2FrameHeader) String() string { + var buf bytes.Buffer + buf.WriteString("[FrameHeader ") + h.writeDebug(&buf) + buf.WriteByte(']') + return buf.String() +} + +func (h http2FrameHeader) writeDebug(buf *bytes.Buffer) { + buf.WriteString(h.Type.String()) + if h.Flags != 0 { + buf.WriteString(" flags=") + set := 0 + for i := uint8(0); i < 8; i++ { + if h.Flags&(1< 1 { + buf.WriteByte('|') + } + name := http2flagName[h.Type][http2Flags(1<>24), + byte(streamID>>16), + byte(streamID>>8), + byte(streamID)) +} + +func (f *http2Framer) endWrite() error { + // Now that we know the final size, fill in the FrameHeader in + // the space previously reserved for it. Abuse append. + length := len(f.wbuf) - http2frameHeaderLen + if length >= (1 << 24) { + return http2ErrFrameTooLarge + } + _ = append(f.wbuf[:0], + byte(length>>16), + byte(length>>8), + byte(length)) + if f.logWrites { + f.logWrite() + } + + n, err := f.w.Write(f.wbuf) + if err == nil && n != len(f.wbuf) { + err = io.ErrShortWrite + } + return err +} + +func (f *http2Framer) logWrite() { + if f.debugFramer == nil { + f.debugFramerBuf = new(bytes.Buffer) + f.debugFramer = http2NewFramer(nil, f.debugFramerBuf) + f.debugFramer.logReads = false // we log it ourselves, saying "wrote" below + // Let us read anything, even if we accidentally wrote it + // in the wrong order: + f.debugFramer.AllowIllegalReads = true + } + f.debugFramerBuf.Write(f.wbuf) + fr, err := f.debugFramer.ReadFrame() + if err != nil { + f.debugWriteLoggerf("http2: Framer %p: failed to decode just-written frame", f) + return + } + f.debugWriteLoggerf("http2: Framer %p: wrote %v", f, http2summarizeFrame(fr)) +} + +func (f *http2Framer) writeByte(v byte) { f.wbuf = append(f.wbuf, v) } + +func (f *http2Framer) writeBytes(v []byte) { f.wbuf = append(f.wbuf, v...) } + +func (f *http2Framer) writeUint16(v uint16) { f.wbuf = append(f.wbuf, byte(v>>8), byte(v)) } + +func (f *http2Framer) writeUint32(v uint32) { + f.wbuf = append(f.wbuf, byte(v>>24), byte(v>>16), byte(v>>8), byte(v)) +} + +const ( + http2minMaxFrameSize = 1 << 14 + http2maxFrameSize = 1<<24 - 1 +) + +// SetReuseFrames allows the Framer to reuse Frames. +// If called on a Framer, Frames returned by calls to ReadFrame are only +// valid until the next call to ReadFrame. +func (fr *http2Framer) SetReuseFrames() { + if fr.frameCache != nil { + return + } + fr.frameCache = &http2frameCache{} +} + +type http2frameCache struct { + dataFrame http2DataFrame +} + +func (fc *http2frameCache) getDataFrame() *http2DataFrame { + if fc == nil { + return &http2DataFrame{} + } + return &fc.dataFrame +} + +// NewFramer returns a Framer that writes frames to w and reads them from r. +func http2NewFramer(w io.Writer, r io.Reader) *http2Framer { + fr := &http2Framer{ + w: w, + r: r, + countError: func(string) {}, + logReads: http2logFrameReads, + logWrites: http2logFrameWrites, + debugReadLoggerf: log.Printf, + debugWriteLoggerf: log.Printf, + } + fr.getReadBuf = func(size uint32) []byte { + if cap(fr.readBuf) >= int(size) { + return fr.readBuf[:size] + } + fr.readBuf = make([]byte, size) + return fr.readBuf + } + fr.SetMaxReadFrameSize(http2maxFrameSize) + return fr +} + +// SetMaxReadFrameSize sets the maximum size of a frame +// that will be read by a subsequent call to ReadFrame. +// It is the caller's responsibility to advertise this +// limit with a SETTINGS frame. +func (fr *http2Framer) SetMaxReadFrameSize(v uint32) { + if v > http2maxFrameSize { + v = http2maxFrameSize + } + fr.maxReadSize = v +} + +// ErrorDetail returns a more detailed error of the last error +// returned by Framer.ReadFrame. For instance, if ReadFrame +// returns a StreamError with code PROTOCOL_ERROR, ErrorDetail +// will say exactly what was invalid. ErrorDetail is not guaranteed +// to return a non-nil value and like the rest of the http2 package, +// its return value is not protected by an API compatibility promise. +// ErrorDetail is reset after the next call to ReadFrame. +func (fr *http2Framer) ErrorDetail() error { + return fr.errDetail +} + +// ErrFrameTooLarge is returned from Framer.ReadFrame when the peer +// sends a frame that is larger than declared with SetMaxReadFrameSize. +var http2ErrFrameTooLarge = errors.New("http2: frame too large") + +// terminalReadFrameError reports whether err is an unrecoverable +// error from ReadFrame and no other frames should be read. +func http2terminalReadFrameError(err error) bool { + if _, ok := err.(http2StreamError); ok { + return false + } + return err != nil +} + +// ReadFrame reads a single frame. The returned Frame is only valid +// until the next call to ReadFrame. +// +// If the frame is larger than previously set with SetMaxReadFrameSize, the +// returned error is ErrFrameTooLarge. Other errors may be of type +// ConnectionError, StreamError, or anything else from the underlying +// reader. +// +// If ReadFrame returns an error and a non-nil Frame, the Frame's StreamID +// indicates the stream responsible for the error. +func (fr *http2Framer) ReadFrame() (http2Frame, error) { + fr.errDetail = nil + if fr.lastFrame != nil { + fr.lastFrame.invalidate() + } + fh, err := http2readFrameHeader(fr.headerBuf[:], fr.r) + if err != nil { + return nil, err + } + if fh.Length > fr.maxReadSize { + if fh == http2invalidHTTP1LookingFrameHeader() { + return nil, fmt.Errorf("http2: failed reading the frame payload: %w, note that the frame header looked like an HTTP/1.1 header", http2ErrFrameTooLarge) + } + return nil, http2ErrFrameTooLarge + } + payload := fr.getReadBuf(fh.Length) + if _, err := io.ReadFull(fr.r, payload); err != nil { + if fh == http2invalidHTTP1LookingFrameHeader() { + return nil, fmt.Errorf("http2: failed reading the frame payload: %w, note that the frame header looked like an HTTP/1.1 header", err) + } + return nil, err + } + f, err := http2typeFrameParser(fh.Type)(fr.frameCache, fh, fr.countError, payload) + if err != nil { + if ce, ok := err.(http2connError); ok { + return nil, fr.connError(ce.Code, ce.Reason) + } + return nil, err + } + if err := fr.checkFrameOrder(f); err != nil { + return nil, err + } + if fr.logReads { + fr.debugReadLoggerf("http2: Framer %p: read %v", fr, http2summarizeFrame(f)) + } + if fh.Type == http2FrameHeaders && fr.ReadMetaHeaders != nil { + return fr.readMetaFrame(f.(*http2HeadersFrame)) + } + return f, nil +} + +// connError returns ConnectionError(code) but first +// stashes away a public reason to the caller can optionally relay it +// to the peer before hanging up on them. This might help others debug +// their implementations. +func (fr *http2Framer) connError(code http2ErrCode, reason string) error { + fr.errDetail = errors.New(reason) + return http2ConnectionError(code) +} + +// checkFrameOrder reports an error if f is an invalid frame to return +// next from ReadFrame. Mostly it checks whether HEADERS and +// CONTINUATION frames are contiguous. +func (fr *http2Framer) checkFrameOrder(f http2Frame) error { + last := fr.lastFrame + fr.lastFrame = f + if fr.AllowIllegalReads { + return nil + } + + fh := f.Header() + if fr.lastHeaderStream != 0 { + if fh.Type != http2FrameContinuation { + return fr.connError(http2ErrCodeProtocol, + fmt.Sprintf("got %s for stream %d; expected CONTINUATION following %s for stream %d", + fh.Type, fh.StreamID, + last.Header().Type, fr.lastHeaderStream)) + } + if fh.StreamID != fr.lastHeaderStream { + return fr.connError(http2ErrCodeProtocol, + fmt.Sprintf("got CONTINUATION for stream %d; expected stream %d", + fh.StreamID, fr.lastHeaderStream)) + } + } else if fh.Type == http2FrameContinuation { + return fr.connError(http2ErrCodeProtocol, fmt.Sprintf("unexpected CONTINUATION for stream %d", fh.StreamID)) + } + + switch fh.Type { + case http2FrameHeaders, http2FrameContinuation: + if fh.Flags.Has(http2FlagHeadersEndHeaders) { + fr.lastHeaderStream = 0 + } else { + fr.lastHeaderStream = fh.StreamID + } + } + + return nil +} + +// A DataFrame conveys arbitrary, variable-length sequences of octets +// associated with a stream. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.1 +type http2DataFrame struct { + http2FrameHeader + data []byte +} + +func (f *http2DataFrame) StreamEnded() bool { + return f.http2FrameHeader.Flags.Has(http2FlagDataEndStream) +} + +// Data returns the frame's data octets, not including any padding +// size byte or padding suffix bytes. +// The caller must not retain the returned memory past the next +// call to ReadFrame. +func (f *http2DataFrame) Data() []byte { + f.checkValid() + return f.data +} + +func http2parseDataFrame(fc *http2frameCache, fh http2FrameHeader, countError func(string), payload []byte) (http2Frame, error) { + if fh.StreamID == 0 { + // DATA frames MUST be associated with a stream. If a + // DATA frame is received whose stream identifier + // field is 0x0, the recipient MUST respond with a + // connection error (Section 5.4.1) of type + // PROTOCOL_ERROR. + countError("frame_data_stream_0") + return nil, http2connError{http2ErrCodeProtocol, "DATA frame with stream ID 0"} + } + f := fc.getDataFrame() + f.http2FrameHeader = fh + + var padSize byte + if fh.Flags.Has(http2FlagDataPadded) { + var err error + payload, padSize, err = http2readByte(payload) + if err != nil { + countError("frame_data_pad_byte_short") + return nil, err + } + } + if int(padSize) > len(payload) { + // If the length of the padding is greater than the + // length of the frame payload, the recipient MUST + // treat this as a connection error. + // Filed: https://github.com/http2/http2-spec/issues/610 + countError("frame_data_pad_too_big") + return nil, http2connError{http2ErrCodeProtocol, "pad size larger than data payload"} + } + f.data = payload[:len(payload)-int(padSize)] + return f, nil +} + +var ( + http2errStreamID = errors.New("invalid stream ID") + http2errDepStreamID = errors.New("invalid dependent stream ID") + http2errPadLength = errors.New("pad length too large") + http2errPadBytes = errors.New("padding bytes must all be zeros unless AllowIllegalWrites is enabled") +) + +func http2validStreamIDOrZero(streamID uint32) bool { + return streamID&(1<<31) == 0 +} + +func http2validStreamID(streamID uint32) bool { + return streamID != 0 && streamID&(1<<31) == 0 +} + +// WriteData writes a DATA frame. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility not to violate the maximum frame size +// and to not call other Write methods concurrently. +func (f *http2Framer) WriteData(streamID uint32, endStream bool, data []byte) error { + return f.WriteDataPadded(streamID, endStream, data, nil) +} + +// WriteDataPadded writes a DATA frame with optional padding. +// +// If pad is nil, the padding bit is not sent. +// The length of pad must not exceed 255 bytes. +// The bytes of pad must all be zero, unless f.AllowIllegalWrites is set. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility not to violate the maximum frame size +// and to not call other Write methods concurrently. +func (f *http2Framer) WriteDataPadded(streamID uint32, endStream bool, data, pad []byte) error { + if err := f.startWriteDataPadded(streamID, endStream, data, pad); err != nil { + return err + } + return f.endWrite() +} + +// startWriteDataPadded is WriteDataPadded, but only writes the frame to the Framer's internal buffer. +// The caller should call endWrite to flush the frame to the underlying writer. +func (f *http2Framer) startWriteDataPadded(streamID uint32, endStream bool, data, pad []byte) error { + if !http2validStreamID(streamID) && !f.AllowIllegalWrites { + return http2errStreamID + } + if len(pad) > 0 { + if len(pad) > 255 { + return http2errPadLength + } + if !f.AllowIllegalWrites { + for _, b := range pad { + if b != 0 { + // "Padding octets MUST be set to zero when sending." + return http2errPadBytes + } + } + } + } + var flags http2Flags + if endStream { + flags |= http2FlagDataEndStream + } + if pad != nil { + flags |= http2FlagDataPadded + } + f.startWrite(http2FrameData, flags, streamID) + if pad != nil { + f.wbuf = append(f.wbuf, byte(len(pad))) + } + f.wbuf = append(f.wbuf, data...) + f.wbuf = append(f.wbuf, pad...) + return nil +} + +// A SettingsFrame conveys configuration parameters that affect how +// endpoints communicate, such as preferences and constraints on peer +// behavior. +// +// See https://httpwg.org/specs/rfc7540.html#SETTINGS +type http2SettingsFrame struct { + http2FrameHeader + p []byte +} + +func http2parseSettingsFrame(_ *http2frameCache, fh http2FrameHeader, countError func(string), p []byte) (http2Frame, error) { + if fh.Flags.Has(http2FlagSettingsAck) && fh.Length > 0 { + // When this (ACK 0x1) bit is set, the payload of the + // SETTINGS frame MUST be empty. Receipt of a + // SETTINGS frame with the ACK flag set and a length + // field value other than 0 MUST be treated as a + // connection error (Section 5.4.1) of type + // FRAME_SIZE_ERROR. + countError("frame_settings_ack_with_length") + return nil, http2ConnectionError(http2ErrCodeFrameSize) + } + if fh.StreamID != 0 { + // SETTINGS frames always apply to a connection, + // never a single stream. The stream identifier for a + // SETTINGS frame MUST be zero (0x0). If an endpoint + // receives a SETTINGS frame whose stream identifier + // field is anything other than 0x0, the endpoint MUST + // respond with a connection error (Section 5.4.1) of + // type PROTOCOL_ERROR. + countError("frame_settings_has_stream") + return nil, http2ConnectionError(http2ErrCodeProtocol) + } + if len(p)%6 != 0 { + countError("frame_settings_mod_6") + // Expecting even number of 6 byte settings. + return nil, http2ConnectionError(http2ErrCodeFrameSize) + } + f := &http2SettingsFrame{http2FrameHeader: fh, p: p} + if v, ok := f.Value(http2SettingInitialWindowSize); ok && v > (1<<31)-1 { + countError("frame_settings_window_size_too_big") + // Values above the maximum flow control window size of 2^31 - 1 MUST + // be treated as a connection error (Section 5.4.1) of type + // FLOW_CONTROL_ERROR. + return nil, http2ConnectionError(http2ErrCodeFlowControl) + } + return f, nil +} + +func (f *http2SettingsFrame) IsAck() bool { + return f.http2FrameHeader.Flags.Has(http2FlagSettingsAck) +} + +func (f *http2SettingsFrame) Value(id http2SettingID) (v uint32, ok bool) { + f.checkValid() + for i := 0; i < f.NumSettings(); i++ { + if s := f.Setting(i); s.ID == id { + return s.Val, true + } + } + return 0, false +} + +// Setting returns the setting from the frame at the given 0-based index. +// The index must be >= 0 and less than f.NumSettings(). +func (f *http2SettingsFrame) Setting(i int) http2Setting { + buf := f.p + return http2Setting{ + ID: http2SettingID(binary.BigEndian.Uint16(buf[i*6 : i*6+2])), + Val: binary.BigEndian.Uint32(buf[i*6+2 : i*6+6]), + } +} + +func (f *http2SettingsFrame) NumSettings() int { return len(f.p) / 6 } + +// HasDuplicates reports whether f contains any duplicate setting IDs. +func (f *http2SettingsFrame) HasDuplicates() bool { + num := f.NumSettings() + if num == 0 { + return false + } + // If it's small enough (the common case), just do the n^2 + // thing and avoid a map allocation. + if num < 10 { + for i := 0; i < num; i++ { + idi := f.Setting(i).ID + for j := i + 1; j < num; j++ { + idj := f.Setting(j).ID + if idi == idj { + return true + } + } + } + return false + } + seen := map[http2SettingID]bool{} + for i := 0; i < num; i++ { + id := f.Setting(i).ID + if seen[id] { + return true + } + seen[id] = true + } + return false +} + +// ForeachSetting runs fn for each setting. +// It stops and returns the first error. +func (f *http2SettingsFrame) ForeachSetting(fn func(http2Setting) error) error { + f.checkValid() + for i := 0; i < f.NumSettings(); i++ { + if err := fn(f.Setting(i)); err != nil { + return err + } + } + return nil +} + +// WriteSettings writes a SETTINGS frame with zero or more settings +// specified and the ACK bit not set. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *http2Framer) WriteSettings(settings ...http2Setting) error { + f.startWrite(http2FrameSettings, 0, 0) + for _, s := range settings { + f.writeUint16(uint16(s.ID)) + f.writeUint32(s.Val) + } + return f.endWrite() +} + +// WriteSettingsAck writes an empty SETTINGS frame with the ACK bit set. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *http2Framer) WriteSettingsAck() error { + f.startWrite(http2FrameSettings, http2FlagSettingsAck, 0) + return f.endWrite() +} + +// A PingFrame is a mechanism for measuring a minimal round trip time +// from the sender, as well as determining whether an idle connection +// is still functional. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.7 +type http2PingFrame struct { + http2FrameHeader + Data [8]byte +} + +func (f *http2PingFrame) IsAck() bool { return f.Flags.Has(http2FlagPingAck) } + +func http2parsePingFrame(_ *http2frameCache, fh http2FrameHeader, countError func(string), payload []byte) (http2Frame, error) { + if len(payload) != 8 { + countError("frame_ping_length") + return nil, http2ConnectionError(http2ErrCodeFrameSize) + } + if fh.StreamID != 0 { + countError("frame_ping_has_stream") + return nil, http2ConnectionError(http2ErrCodeProtocol) + } + f := &http2PingFrame{http2FrameHeader: fh} + copy(f.Data[:], payload) + return f, nil +} + +func (f *http2Framer) WritePing(ack bool, data [8]byte) error { + var flags http2Flags + if ack { + flags = http2FlagPingAck + } + f.startWrite(http2FramePing, flags, 0) + f.writeBytes(data[:]) + return f.endWrite() +} + +// A GoAwayFrame informs the remote peer to stop creating streams on this connection. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.8 +type http2GoAwayFrame struct { + http2FrameHeader + LastStreamID uint32 + ErrCode http2ErrCode + debugData []byte +} + +// DebugData returns any debug data in the GOAWAY frame. Its contents +// are not defined. +// The caller must not retain the returned memory past the next +// call to ReadFrame. +func (f *http2GoAwayFrame) DebugData() []byte { + f.checkValid() + return f.debugData +} + +func http2parseGoAwayFrame(_ *http2frameCache, fh http2FrameHeader, countError func(string), p []byte) (http2Frame, error) { + if fh.StreamID != 0 { + countError("frame_goaway_has_stream") + return nil, http2ConnectionError(http2ErrCodeProtocol) + } + if len(p) < 8 { + countError("frame_goaway_short") + return nil, http2ConnectionError(http2ErrCodeFrameSize) + } + return &http2GoAwayFrame{ + http2FrameHeader: fh, + LastStreamID: binary.BigEndian.Uint32(p[:4]) & (1<<31 - 1), + ErrCode: http2ErrCode(binary.BigEndian.Uint32(p[4:8])), + debugData: p[8:], + }, nil +} + +func (f *http2Framer) WriteGoAway(maxStreamID uint32, code http2ErrCode, debugData []byte) error { + f.startWrite(http2FrameGoAway, 0, 0) + f.writeUint32(maxStreamID & (1<<31 - 1)) + f.writeUint32(uint32(code)) + f.writeBytes(debugData) + return f.endWrite() +} + +// An UnknownFrame is the frame type returned when the frame type is unknown +// or no specific frame type parser exists. +type http2UnknownFrame struct { + http2FrameHeader + p []byte +} + +// Payload returns the frame's payload (after the header). It is not +// valid to call this method after a subsequent call to +// Framer.ReadFrame, nor is it valid to retain the returned slice. +// The memory is owned by the Framer and is invalidated when the next +// frame is read. +func (f *http2UnknownFrame) Payload() []byte { + f.checkValid() + return f.p +} + +func http2parseUnknownFrame(_ *http2frameCache, fh http2FrameHeader, countError func(string), p []byte) (http2Frame, error) { + return &http2UnknownFrame{fh, p}, nil +} + +// A WindowUpdateFrame is used to implement flow control. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.9 +type http2WindowUpdateFrame struct { + http2FrameHeader + Increment uint32 // never read with high bit set +} + +func http2parseWindowUpdateFrame(_ *http2frameCache, fh http2FrameHeader, countError func(string), p []byte) (http2Frame, error) { + if len(p) != 4 { + countError("frame_windowupdate_bad_len") + return nil, http2ConnectionError(http2ErrCodeFrameSize) + } + inc := binary.BigEndian.Uint32(p[:4]) & 0x7fffffff // mask off high reserved bit + if inc == 0 { + // A receiver MUST treat the receipt of a + // WINDOW_UPDATE frame with an flow control window + // increment of 0 as a stream error (Section 5.4.2) of + // type PROTOCOL_ERROR; errors on the connection flow + // control window MUST be treated as a connection + // error (Section 5.4.1). + if fh.StreamID == 0 { + countError("frame_windowupdate_zero_inc_conn") + return nil, http2ConnectionError(http2ErrCodeProtocol) + } + countError("frame_windowupdate_zero_inc_stream") + return nil, http2streamError(fh.StreamID, http2ErrCodeProtocol) + } + return &http2WindowUpdateFrame{ + http2FrameHeader: fh, + Increment: inc, + }, nil +} + +// WriteWindowUpdate writes a WINDOW_UPDATE frame. +// The increment value must be between 1 and 2,147,483,647, inclusive. +// If the Stream ID is zero, the window update applies to the +// connection as a whole. +func (f *http2Framer) WriteWindowUpdate(streamID, incr uint32) error { + // "The legal range for the increment to the flow control window is 1 to 2^31-1 (2,147,483,647) octets." + if (incr < 1 || incr > 2147483647) && !f.AllowIllegalWrites { + return errors.New("illegal window increment value") + } + f.startWrite(http2FrameWindowUpdate, 0, streamID) + f.writeUint32(incr) + return f.endWrite() +} + +// A HeadersFrame is used to open a stream and additionally carries a +// header block fragment. +type http2HeadersFrame struct { + http2FrameHeader + + // Priority is set if FlagHeadersPriority is set in the FrameHeader. + Priority http2PriorityParam + + headerFragBuf []byte // not owned +} + +func (f *http2HeadersFrame) HeaderBlockFragment() []byte { + f.checkValid() + return f.headerFragBuf +} + +func (f *http2HeadersFrame) HeadersEnded() bool { + return f.http2FrameHeader.Flags.Has(http2FlagHeadersEndHeaders) +} + +func (f *http2HeadersFrame) StreamEnded() bool { + return f.http2FrameHeader.Flags.Has(http2FlagHeadersEndStream) +} + +func (f *http2HeadersFrame) HasPriority() bool { + return f.http2FrameHeader.Flags.Has(http2FlagHeadersPriority) +} + +func http2parseHeadersFrame(_ *http2frameCache, fh http2FrameHeader, countError func(string), p []byte) (_ http2Frame, err error) { + hf := &http2HeadersFrame{ + http2FrameHeader: fh, + } + if fh.StreamID == 0 { + // HEADERS frames MUST be associated with a stream. If a HEADERS frame + // is received whose stream identifier field is 0x0, the recipient MUST + // respond with a connection error (Section 5.4.1) of type + // PROTOCOL_ERROR. + countError("frame_headers_zero_stream") + return nil, http2connError{http2ErrCodeProtocol, "HEADERS frame with stream ID 0"} + } + var padLength uint8 + if fh.Flags.Has(http2FlagHeadersPadded) { + if p, padLength, err = http2readByte(p); err != nil { + countError("frame_headers_pad_short") + return + } + } + if fh.Flags.Has(http2FlagHeadersPriority) { + var v uint32 + p, v, err = http2readUint32(p) + if err != nil { + countError("frame_headers_prio_short") + return nil, err + } + hf.Priority.StreamDep = v & 0x7fffffff + hf.Priority.Exclusive = (v != hf.Priority.StreamDep) // high bit was set + p, hf.Priority.Weight, err = http2readByte(p) + if err != nil { + countError("frame_headers_prio_weight_short") + return nil, err + } + } + if len(p)-int(padLength) < 0 { + countError("frame_headers_pad_too_big") + return nil, http2streamError(fh.StreamID, http2ErrCodeProtocol) + } + hf.headerFragBuf = p[:len(p)-int(padLength)] + return hf, nil +} + +// HeadersFrameParam are the parameters for writing a HEADERS frame. +type http2HeadersFrameParam struct { + // StreamID is the required Stream ID to initiate. + StreamID uint32 + // BlockFragment is part (or all) of a Header Block. + BlockFragment []byte + + // EndStream indicates that the header block is the last that + // the endpoint will send for the identified stream. Setting + // this flag causes the stream to enter one of "half closed" + // states. + EndStream bool + + // EndHeaders indicates that this frame contains an entire + // header block and is not followed by any + // CONTINUATION frames. + EndHeaders bool + + // PadLength is the optional number of bytes of zeros to add + // to this frame. + PadLength uint8 + + // Priority, if non-zero, includes stream priority information + // in the HEADER frame. + Priority http2PriorityParam +} + +// WriteHeaders writes a single HEADERS frame. +// +// This is a low-level header writing method. Encoding headers and +// splitting them into any necessary CONTINUATION frames is handled +// elsewhere. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *http2Framer) WriteHeaders(p http2HeadersFrameParam) error { + if !http2validStreamID(p.StreamID) && !f.AllowIllegalWrites { + return http2errStreamID + } + var flags http2Flags + if p.PadLength != 0 { + flags |= http2FlagHeadersPadded + } + if p.EndStream { + flags |= http2FlagHeadersEndStream + } + if p.EndHeaders { + flags |= http2FlagHeadersEndHeaders + } + if !p.Priority.IsZero() { + flags |= http2FlagHeadersPriority + } + f.startWrite(http2FrameHeaders, flags, p.StreamID) + if p.PadLength != 0 { + f.writeByte(p.PadLength) + } + if !p.Priority.IsZero() { + v := p.Priority.StreamDep + if !http2validStreamIDOrZero(v) && !f.AllowIllegalWrites { + return http2errDepStreamID + } + if p.Priority.Exclusive { + v |= 1 << 31 + } + f.writeUint32(v) + f.writeByte(p.Priority.Weight) + } + f.wbuf = append(f.wbuf, p.BlockFragment...) + f.wbuf = append(f.wbuf, http2padZeros[:p.PadLength]...) + return f.endWrite() +} + +// A PriorityFrame specifies the sender-advised priority of a stream. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.3 +type http2PriorityFrame struct { + http2FrameHeader + http2PriorityParam +} + +var http2defaultRFC9218Priority = http2PriorityParam{ + incremental: 0, + urgency: 3, +} + +// Note that HTTP/2 has had two different prioritization schemes, and +// PriorityParam struct below is a superset of both schemes. The exported +// symbols are from RFC 7540 and the non-exported ones are from RFC 9218. + +// PriorityParam are the stream prioritzation parameters. +type http2PriorityParam struct { + // StreamDep is a 31-bit stream identifier for the + // stream that this stream depends on. Zero means no + // dependency. + StreamDep uint32 + + // Exclusive is whether the dependency is exclusive. + Exclusive bool + + // Weight is the stream's zero-indexed weight. It should be + // set together with StreamDep, or neither should be set. Per + // the spec, "Add one to the value to obtain a weight between + // 1 and 256." + Weight uint8 + + // "The urgency (u) parameter value is Integer (see Section 3.3.1 of + // [STRUCTURED-FIELDS]), between 0 and 7 inclusive, in descending order of + // priority. The default is 3." + urgency uint8 + + // "The incremental (i) parameter value is Boolean (see Section 3.3.6 of + // [STRUCTURED-FIELDS]). It indicates if an HTTP response can be processed + // incrementally, i.e., provide some meaningful output as chunks of the + // response arrive." + // + // We use uint8 (i.e. 0 is false, 1 is true) instead of bool so we can + // avoid unnecessary type conversions and because either type takes 1 byte. + incremental uint8 +} + +func (p http2PriorityParam) IsZero() bool { + return p == http2PriorityParam{} +} + +func http2parsePriorityFrame(_ *http2frameCache, fh http2FrameHeader, countError func(string), payload []byte) (http2Frame, error) { + if fh.StreamID == 0 { + countError("frame_priority_zero_stream") + return nil, http2connError{http2ErrCodeProtocol, "PRIORITY frame with stream ID 0"} + } + if len(payload) != 5 { + countError("frame_priority_bad_length") + return nil, http2connError{http2ErrCodeFrameSize, fmt.Sprintf("PRIORITY frame payload size was %d; want 5", len(payload))} + } + v := binary.BigEndian.Uint32(payload[:4]) + streamID := v & 0x7fffffff // mask off high bit + return &http2PriorityFrame{ + http2FrameHeader: fh, + http2PriorityParam: http2PriorityParam{ + Weight: payload[4], + StreamDep: streamID, + Exclusive: streamID != v, // was high bit set? + }, + }, nil +} + +// WritePriority writes a PRIORITY frame. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *http2Framer) WritePriority(streamID uint32, p http2PriorityParam) error { + if !http2validStreamID(streamID) && !f.AllowIllegalWrites { + return http2errStreamID + } + if !http2validStreamIDOrZero(p.StreamDep) { + return http2errDepStreamID + } + f.startWrite(http2FramePriority, 0, streamID) + v := p.StreamDep + if p.Exclusive { + v |= 1 << 31 + } + f.writeUint32(v) + f.writeByte(p.Weight) + return f.endWrite() +} + +// A RSTStreamFrame allows for abnormal termination of a stream. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.4 +type http2RSTStreamFrame struct { + http2FrameHeader + ErrCode http2ErrCode +} + +func http2parseRSTStreamFrame(_ *http2frameCache, fh http2FrameHeader, countError func(string), p []byte) (http2Frame, error) { + if len(p) != 4 { + countError("frame_rststream_bad_len") + return nil, http2ConnectionError(http2ErrCodeFrameSize) + } + if fh.StreamID == 0 { + countError("frame_rststream_zero_stream") + return nil, http2ConnectionError(http2ErrCodeProtocol) + } + return &http2RSTStreamFrame{fh, http2ErrCode(binary.BigEndian.Uint32(p[:4]))}, nil +} + +// WriteRSTStream writes a RST_STREAM frame. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *http2Framer) WriteRSTStream(streamID uint32, code http2ErrCode) error { + if !http2validStreamID(streamID) && !f.AllowIllegalWrites { + return http2errStreamID + } + f.startWrite(http2FrameRSTStream, 0, streamID) + f.writeUint32(uint32(code)) + return f.endWrite() +} + +// A ContinuationFrame is used to continue a sequence of header block fragments. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.10 +type http2ContinuationFrame struct { + http2FrameHeader + headerFragBuf []byte +} + +func http2parseContinuationFrame(_ *http2frameCache, fh http2FrameHeader, countError func(string), p []byte) (http2Frame, error) { + if fh.StreamID == 0 { + countError("frame_continuation_zero_stream") + return nil, http2connError{http2ErrCodeProtocol, "CONTINUATION frame with stream ID 0"} + } + return &http2ContinuationFrame{fh, p}, nil +} + +func (f *http2ContinuationFrame) HeaderBlockFragment() []byte { + f.checkValid() + return f.headerFragBuf +} + +func (f *http2ContinuationFrame) HeadersEnded() bool { + return f.http2FrameHeader.Flags.Has(http2FlagContinuationEndHeaders) +} + +// WriteContinuation writes a CONTINUATION frame. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *http2Framer) WriteContinuation(streamID uint32, endHeaders bool, headerBlockFragment []byte) error { + if !http2validStreamID(streamID) && !f.AllowIllegalWrites { + return http2errStreamID + } + var flags http2Flags + if endHeaders { + flags |= http2FlagContinuationEndHeaders + } + f.startWrite(http2FrameContinuation, flags, streamID) + f.wbuf = append(f.wbuf, headerBlockFragment...) + return f.endWrite() +} + +// A PushPromiseFrame is used to initiate a server stream. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.6 +type http2PushPromiseFrame struct { + http2FrameHeader + PromiseID uint32 + headerFragBuf []byte // not owned +} + +func (f *http2PushPromiseFrame) HeaderBlockFragment() []byte { + f.checkValid() + return f.headerFragBuf +} + +func (f *http2PushPromiseFrame) HeadersEnded() bool { + return f.http2FrameHeader.Flags.Has(http2FlagPushPromiseEndHeaders) +} + +func http2parsePushPromise(_ *http2frameCache, fh http2FrameHeader, countError func(string), p []byte) (_ http2Frame, err error) { + pp := &http2PushPromiseFrame{ + http2FrameHeader: fh, + } + if pp.StreamID == 0 { + // PUSH_PROMISE frames MUST be associated with an existing, + // peer-initiated stream. The stream identifier of a + // PUSH_PROMISE frame indicates the stream it is associated + // with. If the stream identifier field specifies the value + // 0x0, a recipient MUST respond with a connection error + // (Section 5.4.1) of type PROTOCOL_ERROR. + countError("frame_pushpromise_zero_stream") + return nil, http2ConnectionError(http2ErrCodeProtocol) + } + // The PUSH_PROMISE frame includes optional padding. + // Padding fields and flags are identical to those defined for DATA frames + var padLength uint8 + if fh.Flags.Has(http2FlagPushPromisePadded) { + if p, padLength, err = http2readByte(p); err != nil { + countError("frame_pushpromise_pad_short") + return + } + } + + p, pp.PromiseID, err = http2readUint32(p) + if err != nil { + countError("frame_pushpromise_promiseid_short") + return + } + pp.PromiseID = pp.PromiseID & (1<<31 - 1) + + if int(padLength) > len(p) { + // like the DATA frame, error out if padding is longer than the body. + countError("frame_pushpromise_pad_too_big") + return nil, http2ConnectionError(http2ErrCodeProtocol) + } + pp.headerFragBuf = p[:len(p)-int(padLength)] + return pp, nil +} + +// PushPromiseParam are the parameters for writing a PUSH_PROMISE frame. +type http2PushPromiseParam struct { + // StreamID is the required Stream ID to initiate. + StreamID uint32 + + // PromiseID is the required Stream ID which this + // Push Promises + PromiseID uint32 + + // BlockFragment is part (or all) of a Header Block. + BlockFragment []byte + + // EndHeaders indicates that this frame contains an entire + // header block and is not followed by any + // CONTINUATION frames. + EndHeaders bool + + // PadLength is the optional number of bytes of zeros to add + // to this frame. + PadLength uint8 +} + +// WritePushPromise writes a single PushPromise Frame. +// +// As with Header Frames, This is the low level call for writing +// individual frames. Continuation frames are handled elsewhere. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *http2Framer) WritePushPromise(p http2PushPromiseParam) error { + if !http2validStreamID(p.StreamID) && !f.AllowIllegalWrites { + return http2errStreamID + } + var flags http2Flags + if p.PadLength != 0 { + flags |= http2FlagPushPromisePadded + } + if p.EndHeaders { + flags |= http2FlagPushPromiseEndHeaders + } + f.startWrite(http2FramePushPromise, flags, p.StreamID) + if p.PadLength != 0 { + f.writeByte(p.PadLength) + } + if !http2validStreamID(p.PromiseID) && !f.AllowIllegalWrites { + return http2errStreamID + } + f.writeUint32(p.PromiseID) + f.wbuf = append(f.wbuf, p.BlockFragment...) + f.wbuf = append(f.wbuf, http2padZeros[:p.PadLength]...) + return f.endWrite() +} + +// WriteRawFrame writes a raw frame. This can be used to write +// extension frames unknown to this package. +func (f *http2Framer) WriteRawFrame(t http2FrameType, flags http2Flags, streamID uint32, payload []byte) error { + f.startWrite(t, flags, streamID) + f.writeBytes(payload) + return f.endWrite() +} + +func http2readByte(p []byte) (remain []byte, b byte, err error) { + if len(p) == 0 { + return nil, 0, io.ErrUnexpectedEOF + } + return p[1:], p[0], nil +} + +func http2readUint32(p []byte) (remain []byte, v uint32, err error) { + if len(p) < 4 { + return nil, 0, io.ErrUnexpectedEOF + } + return p[4:], binary.BigEndian.Uint32(p[:4]), nil +} + +type http2streamEnder interface { + StreamEnded() bool +} + +type http2headersEnder interface { + HeadersEnded() bool +} + +type http2headersOrContinuation interface { + http2headersEnder + HeaderBlockFragment() []byte +} + +// A MetaHeadersFrame is the representation of one HEADERS frame and +// zero or more contiguous CONTINUATION frames and the decoding of +// their HPACK-encoded contents. +// +// This type of frame does not appear on the wire and is only returned +// by the Framer when Framer.ReadMetaHeaders is set. +type http2MetaHeadersFrame struct { + *http2HeadersFrame + + // Fields are the fields contained in the HEADERS and + // CONTINUATION frames. The underlying slice is owned by the + // Framer and must not be retained after the next call to + // ReadFrame. + // + // Fields are guaranteed to be in the correct http2 order and + // not have unknown pseudo header fields or invalid header + // field names or values. Required pseudo header fields may be + // missing, however. Use the MetaHeadersFrame.Pseudo accessor + // method access pseudo headers. + Fields []hpack.HeaderField + + // Truncated is whether the max header list size limit was hit + // and Fields is incomplete. The hpack decoder state is still + // valid, however. + Truncated bool +} + +// PseudoValue returns the given pseudo header field's value. +// The provided pseudo field should not contain the leading colon. +func (mh *http2MetaHeadersFrame) PseudoValue(pseudo string) string { + for _, hf := range mh.Fields { + if !hf.IsPseudo() { + return "" + } + if hf.Name[1:] == pseudo { + return hf.Value + } + } + return "" +} + +// RegularFields returns the regular (non-pseudo) header fields of mh. +// The caller does not own the returned slice. +func (mh *http2MetaHeadersFrame) RegularFields() []hpack.HeaderField { + for i, hf := range mh.Fields { + if !hf.IsPseudo() { + return mh.Fields[i:] + } + } + return nil +} + +// PseudoFields returns the pseudo header fields of mh. +// The caller does not own the returned slice. +func (mh *http2MetaHeadersFrame) PseudoFields() []hpack.HeaderField { + for i, hf := range mh.Fields { + if !hf.IsPseudo() { + return mh.Fields[:i] + } + } + return mh.Fields +} + +func (mh *http2MetaHeadersFrame) checkPseudos() error { + var isRequest, isResponse bool + pf := mh.PseudoFields() + for i, hf := range pf { + switch hf.Name { + case ":method", ":path", ":scheme", ":authority", ":protocol": + isRequest = true + case ":status": + isResponse = true + default: + return http2pseudoHeaderError(hf.Name) + } + // Check for duplicates. + // This would be a bad algorithm, but N is 5. + // And this doesn't allocate. + for _, hf2 := range pf[:i] { + if hf.Name == hf2.Name { + return http2duplicatePseudoHeaderError(hf.Name) + } + } + } + if isRequest && isResponse { + return http2errMixPseudoHeaderTypes + } + return nil +} + +func (fr *http2Framer) maxHeaderStringLen() int { + v := int(fr.maxHeaderListSize()) + if v < 0 { + // If maxHeaderListSize overflows an int, use no limit (0). + return 0 + } + return v +} + +// readMetaFrame returns 0 or more CONTINUATION frames from fr and +// merge them into the provided hf and returns a MetaHeadersFrame +// with the decoded hpack values. +func (fr *http2Framer) readMetaFrame(hf *http2HeadersFrame) (http2Frame, error) { + if fr.AllowIllegalReads { + return nil, errors.New("illegal use of AllowIllegalReads with ReadMetaHeaders") + } + mh := &http2MetaHeadersFrame{ + http2HeadersFrame: hf, + } + var remainSize = fr.maxHeaderListSize() + var sawRegular bool + + var invalid error // pseudo header field errors + hdec := fr.ReadMetaHeaders + hdec.SetEmitEnabled(true) + hdec.SetMaxStringLength(fr.maxHeaderStringLen()) + hdec.SetEmitFunc(func(hf hpack.HeaderField) { + if http2VerboseLogs && fr.logReads { + fr.debugReadLoggerf("http2: decoded hpack field %+v", hf) + } + if !httpguts.ValidHeaderFieldValue(hf.Value) { + // Don't include the value in the error, because it may be sensitive. + invalid = http2headerFieldValueError(hf.Name) + } + isPseudo := strings.HasPrefix(hf.Name, ":") + if isPseudo { + if sawRegular { + invalid = http2errPseudoAfterRegular + } + } else { + sawRegular = true + if !http2validWireHeaderFieldName(hf.Name) { + invalid = http2headerFieldNameError(hf.Name) + } + } + + if invalid != nil { + hdec.SetEmitEnabled(false) + return + } + + size := hf.Size() + if size > remainSize { + hdec.SetEmitEnabled(false) + mh.Truncated = true + remainSize = 0 + return + } + remainSize -= size + + mh.Fields = append(mh.Fields, hf) + }) + // Lose reference to MetaHeadersFrame: + defer hdec.SetEmitFunc(func(hf hpack.HeaderField) {}) + + var hc http2headersOrContinuation = hf + for { + frag := hc.HeaderBlockFragment() + + // Avoid parsing large amounts of headers that we will then discard. + // If the sender exceeds the max header list size by too much, + // skip parsing the fragment and close the connection. + // + // "Too much" is either any CONTINUATION frame after we've already + // exceeded the max header list size (in which case remainSize is 0), + // or a frame whose encoded size is more than twice the remaining + // header list bytes we're willing to accept. + if int64(len(frag)) > int64(2*remainSize) { + if http2VerboseLogs { + log.Printf("http2: header list too large") + } + // It would be nice to send a RST_STREAM before sending the GOAWAY, + // but the structure of the server's frame writer makes this difficult. + return mh, http2ConnectionError(http2ErrCodeProtocol) + } + + // Also close the connection after any CONTINUATION frame following an + // invalid header, since we stop tracking the size of the headers after + // an invalid one. + if invalid != nil { + if http2VerboseLogs { + log.Printf("http2: invalid header: %v", invalid) + } + // It would be nice to send a RST_STREAM before sending the GOAWAY, + // but the structure of the server's frame writer makes this difficult. + return mh, http2ConnectionError(http2ErrCodeProtocol) + } + + if _, err := hdec.Write(frag); err != nil { + return mh, http2ConnectionError(http2ErrCodeCompression) + } + + if hc.HeadersEnded() { + break + } + if f, err := fr.ReadFrame(); err != nil { + return nil, err + } else { + hc = f.(*http2ContinuationFrame) // guaranteed by checkFrameOrder + } + } + + mh.http2HeadersFrame.headerFragBuf = nil + mh.http2HeadersFrame.invalidate() + + if err := hdec.Close(); err != nil { + return mh, http2ConnectionError(http2ErrCodeCompression) + } + if invalid != nil { + fr.errDetail = invalid + if http2VerboseLogs { + log.Printf("http2: invalid header: %v", invalid) + } + return nil, http2StreamError{mh.StreamID, http2ErrCodeProtocol, invalid} + } + if err := mh.checkPseudos(); err != nil { + fr.errDetail = err + if http2VerboseLogs { + log.Printf("http2: invalid pseudo headers: %v", err) + } + return nil, http2StreamError{mh.StreamID, http2ErrCodeProtocol, err} + } + return mh, nil +} + +func http2summarizeFrame(f http2Frame) string { + var buf bytes.Buffer + f.Header().writeDebug(&buf) + switch f := f.(type) { + case *http2SettingsFrame: + n := 0 + f.ForeachSetting(func(s http2Setting) error { + n++ + if n == 1 { + buf.WriteString(", settings:") + } + fmt.Fprintf(&buf, " %v=%v,", s.ID, s.Val) + return nil + }) + if n > 0 { + buf.Truncate(buf.Len() - 1) // remove trailing comma + } + case *http2DataFrame: + data := f.Data() + const max = 256 + if len(data) > max { + data = data[:max] + } + fmt.Fprintf(&buf, " data=%q", data) + if len(f.Data()) > max { + fmt.Fprintf(&buf, " (%d bytes omitted)", len(f.Data())-max) + } + case *http2WindowUpdateFrame: + if f.StreamID == 0 { + buf.WriteString(" (conn)") + } + fmt.Fprintf(&buf, " incr=%v", f.Increment) + case *http2PingFrame: + fmt.Fprintf(&buf, " ping=%q", f.Data[:]) + case *http2GoAwayFrame: + fmt.Fprintf(&buf, " LastStreamID=%v ErrCode=%v Debug=%q", + f.LastStreamID, f.ErrCode, f.debugData) + case *http2RSTStreamFrame: + fmt.Fprintf(&buf, " ErrCode=%v", f.ErrCode) + } + return buf.String() +} + +var http2DebugGoroutines = os.Getenv("DEBUG_HTTP2_GOROUTINES") == "1" + +// Setting DebugGoroutines to false during a test to disable goroutine debugging +// results in race detector complaints when a test leaves goroutines running before +// returning. Tests shouldn't do this, of course, but when they do it generally shows +// up as infrequent, hard-to-debug flakes. (See #66519.) +// +// Disable goroutine debugging during individual tests with an atomic bool. +// (Note that it's safe to enable/disable debugging mid-test, so the actual race condition +// here is harmless.) +var http2disableDebugGoroutines atomic.Bool + +type http2goroutineLock uint64 + +func http2newGoroutineLock() http2goroutineLock { + if !http2DebugGoroutines || http2disableDebugGoroutines.Load() { + return 0 + } + return http2goroutineLock(http2curGoroutineID()) +} + +func (g http2goroutineLock) check() { + if !http2DebugGoroutines || http2disableDebugGoroutines.Load() { + return + } + if http2curGoroutineID() != uint64(g) { + panic("running on the wrong goroutine") + } +} + +func (g http2goroutineLock) checkNotOn() { + if !http2DebugGoroutines || http2disableDebugGoroutines.Load() { + return + } + if http2curGoroutineID() == uint64(g) { + panic("running on the wrong goroutine") + } +} + +var http2goroutineSpace = []byte("goroutine ") + +func http2curGoroutineID() uint64 { + bp := http2littleBuf.Get().(*[]byte) + defer http2littleBuf.Put(bp) + b := *bp + b = b[:runtime.Stack(b, false)] + // Parse the 4707 out of "goroutine 4707 [" + b = bytes.TrimPrefix(b, http2goroutineSpace) + i := bytes.IndexByte(b, ' ') + if i < 0 { + panic(fmt.Sprintf("No space found in %q", b)) + } + b = b[:i] + n, err := http2parseUintBytes(b, 10, 64) + if err != nil { + panic(fmt.Sprintf("Failed to parse goroutine ID out of %q: %v", b, err)) + } + return n +} + +var http2littleBuf = sync.Pool{ + New: func() interface{} { + buf := make([]byte, 64) + return &buf + }, +} + +// parseUintBytes is like strconv.ParseUint, but using a []byte. +func http2parseUintBytes(s []byte, base int, bitSize int) (n uint64, err error) { + var cutoff, maxVal uint64 + + if bitSize == 0 { + bitSize = int(strconv.IntSize) + } + + s0 := s + switch { + case len(s) < 1: + err = strconv.ErrSyntax + goto Error + + case 2 <= base && base <= 36: + // valid base; nothing to do + + case base == 0: + // Look for octal, hex prefix. + switch { + case s[0] == '0' && len(s) > 1 && (s[1] == 'x' || s[1] == 'X'): + base = 16 + s = s[2:] + if len(s) < 1 { + err = strconv.ErrSyntax + goto Error + } + case s[0] == '0': + base = 8 + default: + base = 10 + } + + default: + err = errors.New("invalid base " + strconv.Itoa(base)) + goto Error + } + + n = 0 + cutoff = http2cutoff64(base) + maxVal = 1<= base { + n = 0 + err = strconv.ErrSyntax + goto Error + } + + if n >= cutoff { + // n*base overflows + n = 1<<64 - 1 + err = strconv.ErrRange + goto Error + } + n *= uint64(base) + + n1 := n + uint64(v) + if n1 < n || n1 > maxVal { + // n+v overflows + n = 1<<64 - 1 + err = strconv.ErrRange + goto Error + } + n = n1 + } + + return n, nil + +Error: + return n, &strconv.NumError{Func: "ParseUint", Num: string(s0), Err: err} +} + +// Return the first number n such that n*base >= 1<<64. +func http2cutoff64(base int) uint64 { + if base < 2 { + return 0 + } + return (1<<64-1)/uint64(base) + 1 +} + +var ( + http2VerboseLogs bool + http2logFrameWrites bool + http2logFrameReads bool + + // Enabling extended CONNECT by causes browsers to attempt to use + // WebSockets-over-HTTP/2. This results in problems when the server's websocket + // package doesn't support extended CONNECT. + // + // Disable extended CONNECT by default for now. + // + // Issue #71128. + http2disableExtendedConnectProtocol = true +) + +func init() { + e := os.Getenv("GODEBUG") + if strings.Contains(e, "http2debug=1") { + http2VerboseLogs = true + } + if strings.Contains(e, "http2debug=2") { + http2VerboseLogs = true + http2logFrameWrites = true + http2logFrameReads = true + } + if strings.Contains(e, "http2xconnect=1") { + http2disableExtendedConnectProtocol = false + } +} + +const ( + // ClientPreface is the string that must be sent by new + // connections from clients. + http2ClientPreface = "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n" + + // SETTINGS_MAX_FRAME_SIZE default + // https://httpwg.org/specs/rfc7540.html#rfc.section.6.5.2 + http2initialMaxFrameSize = 16384 + + // NextProtoTLS is the NPN/ALPN protocol negotiated during + // HTTP/2's TLS setup. + http2NextProtoTLS = "h2" + + // https://httpwg.org/specs/rfc7540.html#SettingValues + http2initialHeaderTableSize = 4096 + + http2initialWindowSize = 65535 // 6.9.2 Initial Flow Control Window Size + + http2defaultMaxReadFrameSize = 1 << 20 +) + +var ( + http2clientPreface = []byte(http2ClientPreface) +) + +type http2streamState int + +// HTTP/2 stream states. +// +// See http://tools.ietf.org/html/rfc7540#section-5.1. +// +// For simplicity, the server code merges "reserved (local)" into +// "half-closed (remote)". This is one less state transition to track. +// The only downside is that we send PUSH_PROMISEs slightly less +// liberally than allowable. More discussion here: +// https://lists.w3.org/Archives/Public/ietf-http-wg/2016JulSep/0599.html +// +// "reserved (remote)" is omitted since the client code does not +// support server push. +const ( + http2stateIdle http2streamState = iota + http2stateOpen + http2stateHalfClosedLocal + http2stateHalfClosedRemote + http2stateClosed +) + +var http2stateName = [...]string{ + http2stateIdle: "Idle", + http2stateOpen: "Open", + http2stateHalfClosedLocal: "HalfClosedLocal", + http2stateHalfClosedRemote: "HalfClosedRemote", + http2stateClosed: "Closed", +} + +func (st http2streamState) String() string { + return http2stateName[st] +} + +// Setting is a setting parameter: which setting it is, and its value. +type http2Setting struct { + // ID is which setting is being set. + // See https://httpwg.org/specs/rfc7540.html#SettingFormat + ID http2SettingID + + // Val is the value. + Val uint32 +} + +func (s http2Setting) String() string { + return fmt.Sprintf("[%v = %d]", s.ID, s.Val) +} + +// Valid reports whether the setting is valid. +func (s http2Setting) Valid() error { + // Limits and error codes from 6.5.2 Defined SETTINGS Parameters + switch s.ID { + case http2SettingEnablePush: + if s.Val != 1 && s.Val != 0 { + return http2ConnectionError(http2ErrCodeProtocol) + } + case http2SettingInitialWindowSize: + if s.Val > 1<<31-1 { + return http2ConnectionError(http2ErrCodeFlowControl) + } + case http2SettingMaxFrameSize: + if s.Val < 16384 || s.Val > 1<<24-1 { + return http2ConnectionError(http2ErrCodeProtocol) + } + case http2SettingEnableConnectProtocol: + if s.Val != 1 && s.Val != 0 { + return http2ConnectionError(http2ErrCodeProtocol) + } + } + return nil +} + +// A SettingID is an HTTP/2 setting as defined in +// https://httpwg.org/specs/rfc7540.html#iana-settings +type http2SettingID uint16 + +const ( + http2SettingHeaderTableSize http2SettingID = 0x1 + http2SettingEnablePush http2SettingID = 0x2 + http2SettingMaxConcurrentStreams http2SettingID = 0x3 + http2SettingInitialWindowSize http2SettingID = 0x4 + http2SettingMaxFrameSize http2SettingID = 0x5 + http2SettingMaxHeaderListSize http2SettingID = 0x6 + http2SettingEnableConnectProtocol http2SettingID = 0x8 +) + +var http2settingName = map[http2SettingID]string{ + http2SettingHeaderTableSize: "HEADER_TABLE_SIZE", + http2SettingEnablePush: "ENABLE_PUSH", + http2SettingMaxConcurrentStreams: "MAX_CONCURRENT_STREAMS", + http2SettingInitialWindowSize: "INITIAL_WINDOW_SIZE", + http2SettingMaxFrameSize: "MAX_FRAME_SIZE", + http2SettingMaxHeaderListSize: "MAX_HEADER_LIST_SIZE", + http2SettingEnableConnectProtocol: "ENABLE_CONNECT_PROTOCOL", +} + +func (s http2SettingID) String() string { + if v, ok := http2settingName[s]; ok { + return v + } + return fmt.Sprintf("UNKNOWN_SETTING_%d", uint16(s)) +} + +// validWireHeaderFieldName reports whether v is a valid header field +// name (key). See httpguts.ValidHeaderName for the base rules. +// +// Further, http2 says: +// +// "Just as in HTTP/1.x, header field names are strings of ASCII +// characters that are compared in a case-insensitive +// fashion. However, header field names MUST be converted to +// lowercase prior to their encoding in HTTP/2. " +func http2validWireHeaderFieldName(v string) bool { + if len(v) == 0 { + return false + } + for _, r := range v { + if !httpguts.IsTokenRune(r) { + return false + } + if 'A' <= r && r <= 'Z' { + return false + } + } + return true +} + +func http2httpCodeString(code int) string { + switch code { + case 200: + return "200" + case 404: + return "404" + } + return strconv.Itoa(code) +} + +// from pkg io +type http2stringWriter interface { + WriteString(s string) (n int, err error) +} + +// A closeWaiter is like a sync.WaitGroup but only goes 1 to 0 (open to closed). +type http2closeWaiter chan struct{} + +// Init makes a closeWaiter usable. +// It exists because so a closeWaiter value can be placed inside a +// larger struct and have the Mutex and Cond's memory in the same +// allocation. +func (cw *http2closeWaiter) Init() { + *cw = make(chan struct{}) +} + +// Close marks the closeWaiter as closed and unblocks any waiters. +func (cw http2closeWaiter) Close() { + close(cw) +} + +// Wait waits for the closeWaiter to become closed. +func (cw http2closeWaiter) Wait() { + <-cw +} + +// bufferedWriter is a buffered writer that writes to w. +// Its buffered writer is lazily allocated as needed, to minimize +// idle memory usage with many connections. +type http2bufferedWriter struct { + _ http2incomparable + conn net.Conn // immutable + bw *bufio.Writer // non-nil when data is buffered + byteTimeout time.Duration // immutable, WriteByteTimeout +} + +func http2newBufferedWriter(conn net.Conn, timeout time.Duration) *http2bufferedWriter { + return &http2bufferedWriter{ + conn: conn, + byteTimeout: timeout, + } +} + +// bufWriterPoolBufferSize is the size of bufio.Writer's +// buffers created using bufWriterPool. +// +// TODO: pick a less arbitrary value? this is a bit under +// (3 x typical 1500 byte MTU) at least. Other than that, +// not much thought went into it. +const http2bufWriterPoolBufferSize = 4 << 10 + +var http2bufWriterPool = sync.Pool{ + New: func() interface{} { + return bufio.NewWriterSize(nil, http2bufWriterPoolBufferSize) + }, +} + +func (w *http2bufferedWriter) Available() int { + if w.bw == nil { + return http2bufWriterPoolBufferSize + } + return w.bw.Available() +} + +func (w *http2bufferedWriter) Write(p []byte) (n int, err error) { + if w.bw == nil { + bw := http2bufWriterPool.Get().(*bufio.Writer) + bw.Reset((*http2bufferedWriterTimeoutWriter)(w)) + w.bw = bw + } + return w.bw.Write(p) +} + +func (w *http2bufferedWriter) Flush() error { + bw := w.bw + if bw == nil { + return nil + } + err := bw.Flush() + bw.Reset(nil) + http2bufWriterPool.Put(bw) + w.bw = nil + return err +} + +type http2bufferedWriterTimeoutWriter http2bufferedWriter + +func (w *http2bufferedWriterTimeoutWriter) Write(p []byte) (n int, err error) { + return http2writeWithByteTimeout(w.conn, w.byteTimeout, p) +} + +// writeWithByteTimeout writes to conn. +// If more than timeout passes without any bytes being written to the connection, +// the write fails. +func http2writeWithByteTimeout(conn net.Conn, timeout time.Duration, p []byte) (n int, err error) { + if timeout <= 0 { + return conn.Write(p) + } + for { + conn.SetWriteDeadline(time.Now().Add(timeout)) + nn, err := conn.Write(p[n:]) + n += nn + if n == len(p) || nn == 0 || !errors.Is(err, os.ErrDeadlineExceeded) { + // Either we finished the write, made no progress, or hit the deadline. + // Whichever it is, we're done now. + conn.SetWriteDeadline(time.Time{}) + return n, err + } + } +} + +func http2mustUint31(v int32) uint32 { + if v < 0 || v > 2147483647 { + panic("out of range") + } + return uint32(v) +} + +// bodyAllowedForStatus reports whether a given response status code +// permits a body. See RFC 7230, section 3.3. +func http2bodyAllowedForStatus(status int) bool { + switch { + case status >= 100 && status <= 199: + return false + case status == 204: + return false + case status == 304: + return false + } + return true +} + +type http2httpError struct { + _ http2incomparable + msg string + timeout bool +} + +func (e *http2httpError) Error() string { return e.msg } + +func (e *http2httpError) Timeout() bool { return e.timeout } + +func (e *http2httpError) Temporary() bool { return true } + +var http2errTimeout error = &http2httpError{msg: "http2: timeout awaiting response headers", timeout: true} + +type http2connectionStater interface { + ConnectionState() tls.ConnectionState +} + +var http2sorterPool = sync.Pool{New: func() interface{} { return new(http2sorter) }} + +type http2sorter struct { + v []string // owned by sorter +} + +func (s *http2sorter) Len() int { return len(s.v) } + +func (s *http2sorter) Swap(i, j int) { s.v[i], s.v[j] = s.v[j], s.v[i] } + +func (s *http2sorter) Less(i, j int) bool { return s.v[i] < s.v[j] } + +// Keys returns the sorted keys of h. +// +// The returned slice is only valid until s used again or returned to +// its pool. +func (s *http2sorter) Keys(h Header) []string { + keys := s.v[:0] + for k := range h { + keys = append(keys, k) + } + s.v = keys + sort.Sort(s) + return keys +} + +func (s *http2sorter) SortStrings(ss []string) { + // Our sorter works on s.v, which sorter owns, so + // stash it away while we sort the user's buffer. + save := s.v + s.v = ss + sort.Sort(s) + s.v = save +} + +// incomparable is a zero-width, non-comparable type. Adding it to a struct +// makes that struct also non-comparable, and generally doesn't add +// any size (as long as it's first). +type http2incomparable [0]func() + +// pipe is a goroutine-safe io.Reader/io.Writer pair. It's like +// io.Pipe except there are no PipeReader/PipeWriter halves, and the +// underlying buffer is an interface. (io.Pipe is always unbuffered) +type http2pipe struct { + mu sync.Mutex + c sync.Cond // c.L lazily initialized to &p.mu + b http2pipeBuffer // nil when done reading + unread int // bytes unread when done + err error // read error once empty. non-nil means closed. + breakErr error // immediate read error (caller doesn't see rest of b) + donec chan struct{} // closed on error + readFn func() // optional code to run in Read before error +} + +type http2pipeBuffer interface { + Len() int + io.Writer + io.Reader +} + +// setBuffer initializes the pipe buffer. +// It has no effect if the pipe is already closed. +func (p *http2pipe) setBuffer(b http2pipeBuffer) { + p.mu.Lock() + defer p.mu.Unlock() + if p.err != nil || p.breakErr != nil { + return + } + p.b = b +} + +func (p *http2pipe) Len() int { + p.mu.Lock() + defer p.mu.Unlock() + if p.b == nil { + return p.unread + } + return p.b.Len() +} + +// Read waits until data is available and copies bytes +// from the buffer into p. +func (p *http2pipe) Read(d []byte) (n int, err error) { + p.mu.Lock() + defer p.mu.Unlock() + if p.c.L == nil { + p.c.L = &p.mu + } + for { + if p.breakErr != nil { + return 0, p.breakErr + } + if p.b != nil && p.b.Len() > 0 { + return p.b.Read(d) + } + if p.err != nil { + if p.readFn != nil { + p.readFn() // e.g. copy trailers + p.readFn = nil // not sticky like p.err + } + p.b = nil + return 0, p.err + } + p.c.Wait() + } +} + +var ( + http2errClosedPipeWrite = errors.New("write on closed buffer") + http2errUninitializedPipeWrite = errors.New("write on uninitialized buffer") +) + +// Write copies bytes from p into the buffer and wakes a reader. +// It is an error to write more data than the buffer can hold. +func (p *http2pipe) Write(d []byte) (n int, err error) { + p.mu.Lock() + defer p.mu.Unlock() + if p.c.L == nil { + p.c.L = &p.mu + } + defer p.c.Signal() + if p.err != nil || p.breakErr != nil { + return 0, http2errClosedPipeWrite + } + // pipe.setBuffer is never invoked, leaving the buffer uninitialized. + // We shouldn't try to write to an uninitialized pipe, + // but returning an error is better than panicking. + if p.b == nil { + return 0, http2errUninitializedPipeWrite + } + return p.b.Write(d) +} + +// CloseWithError causes the next Read (waking up a current blocked +// Read if needed) to return the provided err after all data has been +// read. +// +// The error must be non-nil. +func (p *http2pipe) CloseWithError(err error) { p.closeWithError(&p.err, err, nil) } + +// BreakWithError causes the next Read (waking up a current blocked +// Read if needed) to return the provided err immediately, without +// waiting for unread data. +func (p *http2pipe) BreakWithError(err error) { p.closeWithError(&p.breakErr, err, nil) } + +// closeWithErrorAndCode is like CloseWithError but also sets some code to run +// in the caller's goroutine before returning the error. +func (p *http2pipe) closeWithErrorAndCode(err error, fn func()) { p.closeWithError(&p.err, err, fn) } + +func (p *http2pipe) closeWithError(dst *error, err error, fn func()) { + if err == nil { + panic("err must be non-nil") + } + p.mu.Lock() + defer p.mu.Unlock() + if p.c.L == nil { + p.c.L = &p.mu + } + defer p.c.Signal() + if *dst != nil { + // Already been done. + return + } + p.readFn = fn + if dst == &p.breakErr { + if p.b != nil { + p.unread += p.b.Len() + } + p.b = nil + } + *dst = err + p.closeDoneLocked() +} + +// requires p.mu be held. +func (p *http2pipe) closeDoneLocked() { + if p.donec == nil { + return + } + // Close if unclosed. This isn't racy since we always + // hold p.mu while closing. + select { + case <-p.donec: + default: + close(p.donec) + } +} + +// Err returns the error (if any) first set by BreakWithError or CloseWithError. +func (p *http2pipe) Err() error { + p.mu.Lock() + defer p.mu.Unlock() + if p.breakErr != nil { + return p.breakErr + } + return p.err +} + +// Done returns a channel which is closed if and when this pipe is closed +// with CloseWithError. +func (p *http2pipe) Done() <-chan struct{} { + p.mu.Lock() + defer p.mu.Unlock() + if p.donec == nil { + p.donec = make(chan struct{}) + if p.err != nil || p.breakErr != nil { + // Already hit an error. + p.closeDoneLocked() + } + } + return p.donec +} + +const ( + http2prefaceTimeout = 10 * time.Second + http2firstSettingsTimeout = 2 * time.Second // should be in-flight with preface anyway + http2handlerChunkWriteSize = 4 << 10 + http2defaultMaxStreams = 250 // TODO: make this 100 as the GFE seems to? + + // maxQueuedControlFrames is the maximum number of control frames like + // SETTINGS, PING and RST_STREAM that will be queued for writing before + // the connection is closed to prevent memory exhaustion attacks. + http2maxQueuedControlFrames = 10000 +) + +var ( + http2errClientDisconnected = errors.New("client disconnected") + http2errClosedBody = errors.New("body closed by handler") + http2errHandlerComplete = errors.New("http2: request body closed due to handler exiting") + http2errStreamClosed = errors.New("http2: stream closed") +) + +var http2responseWriterStatePool = sync.Pool{ + New: func() interface{} { + rws := &http2responseWriterState{} + rws.bw = bufio.NewWriterSize(http2chunkWriter{rws}, http2handlerChunkWriteSize) + return rws + }, +} + +// Test hooks. +var ( + http2testHookOnConn func() + http2testHookGetServerConn func(*http2serverConn) + http2testHookOnPanicMu *sync.Mutex // nil except in tests + http2testHookOnPanic func(sc *http2serverConn, panicVal interface{}) (rePanic bool) +) + +// Server is an HTTP/2 server. +type http2Server struct { + // MaxHandlers limits the number of http.Handler ServeHTTP goroutines + // which may run at a time over all connections. + // Negative or zero no limit. + // TODO: implement + MaxHandlers int + + // MaxConcurrentStreams optionally specifies the number of + // concurrent streams that each client may have open at a + // time. This is unrelated to the number of http.Handler goroutines + // which may be active globally, which is MaxHandlers. + // If zero, MaxConcurrentStreams defaults to at least 100, per + // the HTTP/2 spec's recommendations. + MaxConcurrentStreams uint32 + + // MaxDecoderHeaderTableSize optionally specifies the http2 + // SETTINGS_HEADER_TABLE_SIZE to send in the initial settings frame. It + // informs the remote endpoint of the maximum size of the header compression + // table used to decode header blocks, in octets. If zero, the default value + // of 4096 is used. + MaxDecoderHeaderTableSize uint32 + + // MaxEncoderHeaderTableSize optionally specifies an upper limit for the + // header compression table used for encoding request headers. Received + // SETTINGS_HEADER_TABLE_SIZE settings are capped at this limit. If zero, + // the default value of 4096 is used. + MaxEncoderHeaderTableSize uint32 + + // MaxReadFrameSize optionally specifies the largest frame + // this server is willing to read. A valid value is between + // 16k and 16M, inclusive. If zero or otherwise invalid, a + // default value is used. + MaxReadFrameSize uint32 + + // PermitProhibitedCipherSuites, if true, permits the use of + // cipher suites prohibited by the HTTP/2 spec. + PermitProhibitedCipherSuites bool + + // IdleTimeout specifies how long until idle clients should be + // closed with a GOAWAY frame. PING frames are not considered + // activity for the purposes of IdleTimeout. + // If zero or negative, there is no timeout. + IdleTimeout time.Duration + + // ReadIdleTimeout is the timeout after which a health check using a ping + // frame will be carried out if no frame is received on the connection. + // If zero, no health check is performed. + ReadIdleTimeout time.Duration + + // PingTimeout is the timeout after which the connection will be closed + // if a response to a ping is not received. + // If zero, a default of 15 seconds is used. + PingTimeout time.Duration + + // WriteByteTimeout is the timeout after which a connection will be + // closed if no data can be written to it. The timeout begins when data is + // available to write, and is extended whenever any bytes are written. + // If zero or negative, there is no timeout. + WriteByteTimeout time.Duration + + // MaxUploadBufferPerConnection is the size of the initial flow + // control window for each connections. The HTTP/2 spec does not + // allow this to be smaller than 65535 or larger than 2^32-1. + // If the value is outside this range, a default value will be + // used instead. + MaxUploadBufferPerConnection int32 + + // MaxUploadBufferPerStream is the size of the initial flow control + // window for each stream. The HTTP/2 spec does not allow this to + // be larger than 2^32-1. If the value is zero or larger than the + // maximum, a default value will be used instead. + MaxUploadBufferPerStream int32 + + // NewWriteScheduler constructs a write scheduler for a connection. + // If nil, a default scheduler is chosen. + NewWriteScheduler func() http2WriteScheduler + + // CountError, if non-nil, is called on HTTP/2 server errors. + // It's intended to increment a metric for monitoring, such + // as an expvar or Prometheus metric. + // The errType consists of only ASCII word characters. + CountError func(errType string) + + // Internal state. This is a pointer (rather than embedded directly) + // so that we don't embed a Mutex in this struct, which will make the + // struct non-copyable, which might break some callers. + state *http2serverInternalState +} + +type http2serverInternalState struct { + mu sync.Mutex + activeConns map[*http2serverConn]struct{} + + // Pool of error channels. This is per-Server rather than global + // because channels can't be reused across synctest bubbles. + errChanPool sync.Pool +} + +func (s *http2serverInternalState) registerConn(sc *http2serverConn) { + if s == nil { + return // if the Server was used without calling ConfigureServer + } + s.mu.Lock() + s.activeConns[sc] = struct{}{} + s.mu.Unlock() +} + +func (s *http2serverInternalState) unregisterConn(sc *http2serverConn) { + if s == nil { + return // if the Server was used without calling ConfigureServer + } + s.mu.Lock() + delete(s.activeConns, sc) + s.mu.Unlock() +} + +func (s *http2serverInternalState) startGracefulShutdown() { + if s == nil { + return // if the Server was used without calling ConfigureServer + } + s.mu.Lock() + for sc := range s.activeConns { + sc.startGracefulShutdown() + } + s.mu.Unlock() +} + +// Global error channel pool used for uninitialized Servers. +// We use a per-Server pool when possible to avoid using channels across synctest bubbles. +var http2errChanPool = sync.Pool{ + New: func() any { return make(chan error, 1) }, +} + +func (s *http2serverInternalState) getErrChan() chan error { + if s == nil { + return http2errChanPool.Get().(chan error) // Server used without calling ConfigureServer + } + return s.errChanPool.Get().(chan error) +} + +func (s *http2serverInternalState) putErrChan(ch chan error) { + if s == nil { + http2errChanPool.Put(ch) // Server used without calling ConfigureServer + return + } + s.errChanPool.Put(ch) +} + +// ConfigureServer adds HTTP/2 support to a net/http Server. +// +// The configuration conf may be nil. +// +// ConfigureServer must be called before s begins serving. +func http2ConfigureServer(s *Server, conf *http2Server) error { + if s == nil { + panic("nil *http.Server") + } + if conf == nil { + conf = new(http2Server) + } + conf.state = &http2serverInternalState{ + activeConns: make(map[*http2serverConn]struct{}), + errChanPool: sync.Pool{New: func() any { return make(chan error, 1) }}, + } + if h1, h2 := s, conf; h2.IdleTimeout == 0 { + if h1.IdleTimeout != 0 { + h2.IdleTimeout = h1.IdleTimeout + } else { + h2.IdleTimeout = h1.ReadTimeout + } + } + s.RegisterOnShutdown(conf.state.startGracefulShutdown) + + if s.TLSConfig == nil { + s.TLSConfig = new(tls.Config) + } else if s.TLSConfig.CipherSuites != nil && s.TLSConfig.MinVersion < tls.VersionTLS13 { + // If they already provided a TLS 1.0–1.2 CipherSuite list, return an + // error if it is missing ECDHE_RSA_WITH_AES_128_GCM_SHA256 or + // ECDHE_ECDSA_WITH_AES_128_GCM_SHA256. + haveRequired := false + for _, cs := range s.TLSConfig.CipherSuites { + switch cs { + case tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + // Alternative MTI cipher to not discourage ECDSA-only servers. + // See http://golang.org/cl/30721 for further information. + tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256: + haveRequired = true + } + } + if !haveRequired { + return fmt.Errorf("http2: TLSConfig.CipherSuites is missing an HTTP/2-required AES_128_GCM_SHA256 cipher (need at least one of TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 or TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)") + } + } + + // Note: not setting MinVersion to tls.VersionTLS12, + // as we don't want to interfere with HTTP/1.1 traffic + // on the user's server. We enforce TLS 1.2 later once + // we accept a connection. Ideally this should be done + // during next-proto selection, but using TLS <1.2 with + // HTTP/2 is still the client's bug. + + s.TLSConfig.PreferServerCipherSuites = true + + if !http2strSliceContains(s.TLSConfig.NextProtos, http2NextProtoTLS) { + s.TLSConfig.NextProtos = append(s.TLSConfig.NextProtos, http2NextProtoTLS) + } + if !http2strSliceContains(s.TLSConfig.NextProtos, "http/1.1") { + s.TLSConfig.NextProtos = append(s.TLSConfig.NextProtos, "http/1.1") + } + + if s.TLSNextProto == nil { + s.TLSNextProto = map[string]func(*Server, *tls.Conn, Handler){} + } + protoHandler := func(hs *Server, c net.Conn, h Handler, sawClientPreface bool) { + if http2testHookOnConn != nil { + http2testHookOnConn() + } + // The TLSNextProto interface predates contexts, so + // the net/http package passes down its per-connection + // base context via an exported but unadvertised + // method on the Handler. This is for internal + // net/http<=>http2 use only. + var ctx context.Context + type baseContexter interface { + BaseContext() context.Context + } + if bc, ok := h.(baseContexter); ok { + ctx = bc.BaseContext() + } + conf.ServeConn(c, &http2ServeConnOpts{ + Context: ctx, + Handler: h, + BaseConfig: hs, + SawClientPreface: sawClientPreface, + }) + } + s.TLSNextProto[http2NextProtoTLS] = func(hs *Server, c *tls.Conn, h Handler) { + protoHandler(hs, c, h, false) + } + // The "unencrypted_http2" TLSNextProto key is used to pass off non-TLS HTTP/2 conns. + // + // A connection passed in this method has already had the HTTP/2 preface read from it. + s.TLSNextProto[http2nextProtoUnencryptedHTTP2] = func(hs *Server, c *tls.Conn, h Handler) { + nc, err := http2unencryptedNetConnFromTLSConn(c) + if err != nil { + if lg := hs.ErrorLog; lg != nil { + lg.Print(err) + } else { + log.Print(err) + } + go c.Close() + return + } + protoHandler(hs, nc, h, true) + } + return nil +} + +// ServeConnOpts are options for the Server.ServeConn method. +type http2ServeConnOpts struct { + // Context is the base context to use. + // If nil, context.Background is used. + Context context.Context + + // BaseConfig optionally sets the base configuration + // for values. If nil, defaults are used. + BaseConfig *Server + + // Handler specifies which handler to use for processing + // requests. If nil, BaseConfig.Handler is used. If BaseConfig + // or BaseConfig.Handler is nil, http.DefaultServeMux is used. + Handler Handler + + // UpgradeRequest is an initial request received on a connection + // undergoing an h2c upgrade. The request body must have been + // completely read from the connection before calling ServeConn, + // and the 101 Switching Protocols response written. + UpgradeRequest *Request + + // Settings is the decoded contents of the HTTP2-Settings header + // in an h2c upgrade request. + Settings []byte + + // SawClientPreface is set if the HTTP/2 connection preface + // has already been read from the connection. + SawClientPreface bool +} + +func (o *http2ServeConnOpts) context() context.Context { + if o != nil && o.Context != nil { + return o.Context + } + return context.Background() +} + +func (o *http2ServeConnOpts) baseConfig() *Server { + if o != nil && o.BaseConfig != nil { + return o.BaseConfig + } + return new(Server) +} + +func (o *http2ServeConnOpts) handler() Handler { + if o != nil { + if o.Handler != nil { + return o.Handler + } + if o.BaseConfig != nil && o.BaseConfig.Handler != nil { + return o.BaseConfig.Handler + } + } + return DefaultServeMux +} + +// ServeConn serves HTTP/2 requests on the provided connection and +// blocks until the connection is no longer readable. +// +// ServeConn starts speaking HTTP/2 assuming that c has not had any +// reads or writes. It writes its initial settings frame and expects +// to be able to read the preface and settings frame from the +// client. If c has a ConnectionState method like a *tls.Conn, the +// ConnectionState is used to verify the TLS ciphersuite and to set +// the Request.TLS field in Handlers. +// +// ServeConn does not support h2c by itself. Any h2c support must be +// implemented in terms of providing a suitably-behaving net.Conn. +// +// The opts parameter is optional. If nil, default values are used. +func (s *http2Server) ServeConn(c net.Conn, opts *http2ServeConnOpts) { + if opts == nil { + opts = &http2ServeConnOpts{} + } + s.serveConn(c, opts, nil) +} + +func (s *http2Server) serveConn(c net.Conn, opts *http2ServeConnOpts, newf func(*http2serverConn)) { + baseCtx, cancel := http2serverConnBaseContext(c, opts) + defer cancel() + + http1srv := opts.baseConfig() + conf := http2configFromServer(http1srv, s) + sc := &http2serverConn{ + srv: s, + hs: http1srv, + conn: c, + baseCtx: baseCtx, + remoteAddrStr: c.RemoteAddr().String(), + bw: http2newBufferedWriter(c, conf.WriteByteTimeout), + handler: opts.handler(), + streams: make(map[uint32]*http2stream), + readFrameCh: make(chan http2readFrameResult), + wantWriteFrameCh: make(chan http2FrameWriteRequest, 8), + serveMsgCh: make(chan interface{}, 8), + wroteFrameCh: make(chan http2frameWriteResult, 1), // buffered; one send in writeFrameAsync + bodyReadCh: make(chan http2bodyReadMsg), // buffering doesn't matter either way + doneServing: make(chan struct{}), + clientMaxStreams: math.MaxUint32, // Section 6.5.2: "Initially, there is no limit to this value" + advMaxStreams: conf.MaxConcurrentStreams, + initialStreamSendWindowSize: http2initialWindowSize, + initialStreamRecvWindowSize: conf.MaxUploadBufferPerStream, + maxFrameSize: http2initialMaxFrameSize, + pingTimeout: conf.PingTimeout, + countErrorFunc: conf.CountError, + serveG: http2newGoroutineLock(), + pushEnabled: true, + sawClientPreface: opts.SawClientPreface, + } + if newf != nil { + newf(sc) + } + + s.state.registerConn(sc) + defer s.state.unregisterConn(sc) + + // The net/http package sets the write deadline from the + // http.Server.WriteTimeout during the TLS handshake, but then + // passes the connection off to us with the deadline already set. + // Write deadlines are set per stream in serverConn.newStream. + // Disarm the net.Conn write deadline here. + if sc.hs.WriteTimeout > 0 { + sc.conn.SetWriteDeadline(time.Time{}) + } + + if s.NewWriteScheduler != nil { + sc.writeSched = s.NewWriteScheduler() + } else { + sc.writeSched = http2newRoundRobinWriteScheduler() + } + + // These start at the RFC-specified defaults. If there is a higher + // configured value for inflow, that will be updated when we send a + // WINDOW_UPDATE shortly after sending SETTINGS. + sc.flow.add(http2initialWindowSize) + sc.inflow.init(http2initialWindowSize) + sc.hpackEncoder = hpack.NewEncoder(&sc.headerWriteBuf) + sc.hpackEncoder.SetMaxDynamicTableSizeLimit(conf.MaxEncoderHeaderTableSize) + + fr := http2NewFramer(sc.bw, c) + if conf.CountError != nil { + fr.countError = conf.CountError + } + fr.ReadMetaHeaders = hpack.NewDecoder(conf.MaxDecoderHeaderTableSize, nil) + fr.MaxHeaderListSize = sc.maxHeaderListSize() + fr.SetMaxReadFrameSize(conf.MaxReadFrameSize) + sc.framer = fr + + if tc, ok := c.(http2connectionStater); ok { + sc.tlsState = new(tls.ConnectionState) + *sc.tlsState = tc.ConnectionState() + // 9.2 Use of TLS Features + // An implementation of HTTP/2 over TLS MUST use TLS + // 1.2 or higher with the restrictions on feature set + // and cipher suite described in this section. Due to + // implementation limitations, it might not be + // possible to fail TLS negotiation. An endpoint MUST + // immediately terminate an HTTP/2 connection that + // does not meet the TLS requirements described in + // this section with a connection error (Section + // 5.4.1) of type INADEQUATE_SECURITY. + if sc.tlsState.Version < tls.VersionTLS12 { + sc.rejectConn(http2ErrCodeInadequateSecurity, "TLS version too low") + return + } + + if sc.tlsState.ServerName == "" { + // Client must use SNI, but we don't enforce that anymore, + // since it was causing problems when connecting to bare IP + // addresses during development. + // + // TODO: optionally enforce? Or enforce at the time we receive + // a new request, and verify the ServerName matches the :authority? + // But that precludes proxy situations, perhaps. + // + // So for now, do nothing here again. + } + + if !conf.PermitProhibitedCipherSuites && http2isBadCipher(sc.tlsState.CipherSuite) { + // "Endpoints MAY choose to generate a connection error + // (Section 5.4.1) of type INADEQUATE_SECURITY if one of + // the prohibited cipher suites are negotiated." + // + // We choose that. In my opinion, the spec is weak + // here. It also says both parties must support at least + // TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 so there's no + // excuses here. If we really must, we could allow an + // "AllowInsecureWeakCiphers" option on the server later. + // Let's see how it plays out first. + sc.rejectConn(http2ErrCodeInadequateSecurity, fmt.Sprintf("Prohibited TLS 1.2 Cipher Suite: %x", sc.tlsState.CipherSuite)) + return + } + } + + if opts.Settings != nil { + fr := &http2SettingsFrame{ + http2FrameHeader: http2FrameHeader{valid: true}, + p: opts.Settings, + } + if err := fr.ForeachSetting(sc.processSetting); err != nil { + sc.rejectConn(http2ErrCodeProtocol, "invalid settings") + return + } + opts.Settings = nil + } + + if hook := http2testHookGetServerConn; hook != nil { + hook(sc) + } + + if opts.UpgradeRequest != nil { + sc.upgradeRequest(opts.UpgradeRequest) + opts.UpgradeRequest = nil + } + + sc.serve(conf) +} + +func http2serverConnBaseContext(c net.Conn, opts *http2ServeConnOpts) (ctx context.Context, cancel func()) { + ctx, cancel = context.WithCancel(opts.context()) + ctx = context.WithValue(ctx, LocalAddrContextKey, c.LocalAddr()) + if hs := opts.baseConfig(); hs != nil { + ctx = context.WithValue(ctx, ServerContextKey, hs) + } + return +} + +func (sc *http2serverConn) rejectConn(err http2ErrCode, debug string) { + sc.vlogf("http2: server rejecting conn: %v, %s", err, debug) + // ignoring errors. hanging up anyway. + sc.framer.WriteGoAway(0, err, []byte(debug)) + sc.bw.Flush() + sc.conn.Close() +} + +type http2serverConn struct { + // Immutable: + srv *http2Server + hs *Server + conn net.Conn + bw *http2bufferedWriter // writing to conn + handler Handler + baseCtx context.Context + framer *http2Framer + doneServing chan struct{} // closed when serverConn.serve ends + readFrameCh chan http2readFrameResult // written by serverConn.readFrames + wantWriteFrameCh chan http2FrameWriteRequest // from handlers -> serve + wroteFrameCh chan http2frameWriteResult // from writeFrameAsync -> serve, tickles more frame writes + bodyReadCh chan http2bodyReadMsg // from handlers -> serve + serveMsgCh chan interface{} // misc messages & code to send to / run on the serve loop + flow http2outflow // conn-wide (not stream-specific) outbound flow control + inflow http2inflow // conn-wide inbound flow control + tlsState *tls.ConnectionState // shared by all handlers, like net/http + remoteAddrStr string + writeSched http2WriteScheduler + countErrorFunc func(errType string) + + // Everything following is owned by the serve loop; use serveG.check(): + serveG http2goroutineLock // used to verify funcs are on serve() + pushEnabled bool + sawClientPreface bool // preface has already been read, used in h2c upgrade + sawFirstSettings bool // got the initial SETTINGS frame after the preface + needToSendSettingsAck bool + unackedSettings int // how many SETTINGS have we sent without ACKs? + queuedControlFrames int // control frames in the writeSched queue + clientMaxStreams uint32 // SETTINGS_MAX_CONCURRENT_STREAMS from client (our PUSH_PROMISE limit) + advMaxStreams uint32 // our SETTINGS_MAX_CONCURRENT_STREAMS advertised the client + curClientStreams uint32 // number of open streams initiated by the client + curPushedStreams uint32 // number of open streams initiated by server push + curHandlers uint32 // number of running handler goroutines + maxClientStreamID uint32 // max ever seen from client (odd), or 0 if there have been no client requests + maxPushPromiseID uint32 // ID of the last push promise (even), or 0 if there have been no pushes + streams map[uint32]*http2stream + unstartedHandlers []http2unstartedHandler + initialStreamSendWindowSize int32 + initialStreamRecvWindowSize int32 + maxFrameSize int32 + peerMaxHeaderListSize uint32 // zero means unknown (default) + canonHeader map[string]string // http2-lower-case -> Go-Canonical-Case + canonHeaderKeysSize int // canonHeader keys size in bytes + writingFrame bool // started writing a frame (on serve goroutine or separate) + writingFrameAsync bool // started a frame on its own goroutine but haven't heard back on wroteFrameCh + needsFrameFlush bool // last frame write wasn't a flush + inGoAway bool // we've started to or sent GOAWAY + inFrameScheduleLoop bool // whether we're in the scheduleFrameWrite loop + needToSendGoAway bool // we need to schedule a GOAWAY frame write + pingSent bool + sentPingData [8]byte + goAwayCode http2ErrCode + shutdownTimer *time.Timer // nil until used + idleTimer *time.Timer // nil if unused + readIdleTimeout time.Duration + pingTimeout time.Duration + readIdleTimer *time.Timer // nil if unused + + // Owned by the writeFrameAsync goroutine: + headerWriteBuf bytes.Buffer + hpackEncoder *hpack.Encoder + + // Used by startGracefulShutdown. + shutdownOnce sync.Once +} + +func (sc *http2serverConn) maxHeaderListSize() uint32 { + n := sc.hs.MaxHeaderBytes + if n <= 0 { + n = DefaultMaxHeaderBytes + } + return uint32(http2adjustHTTP1MaxHeaderSize(int64(n))) +} + +func (sc *http2serverConn) curOpenStreams() uint32 { + sc.serveG.check() + return sc.curClientStreams + sc.curPushedStreams +} + +// stream represents a stream. This is the minimal metadata needed by +// the serve goroutine. Most of the actual stream state is owned by +// the http.Handler's goroutine in the responseWriter. Because the +// responseWriter's responseWriterState is recycled at the end of a +// handler, this struct intentionally has no pointer to the +// *responseWriter{,State} itself, as the Handler ending nils out the +// responseWriter's state field. +type http2stream struct { + // immutable: + sc *http2serverConn + id uint32 + body *http2pipe // non-nil if expecting DATA frames + cw http2closeWaiter // closed wait stream transitions to closed state + ctx context.Context + cancelCtx func() + + // owned by serverConn's serve loop: + bodyBytes int64 // body bytes seen so far + declBodyBytes int64 // or -1 if undeclared + flow http2outflow // limits writing from Handler to client + inflow http2inflow // what the client is allowed to POST/etc to us + state http2streamState + resetQueued bool // RST_STREAM queued for write; set by sc.resetStream + gotTrailerHeader bool // HEADER frame for trailers was seen + wroteHeaders bool // whether we wrote headers (not status 100) + readDeadline *time.Timer // nil if unused + writeDeadline *time.Timer // nil if unused + closeErr error // set before cw is closed + + trailer Header // accumulated trailers + reqTrailer Header // handler's Request.Trailer +} + +func (sc *http2serverConn) Framer() *http2Framer { return sc.framer } + +func (sc *http2serverConn) CloseConn() error { return sc.conn.Close() } + +func (sc *http2serverConn) Flush() error { return sc.bw.Flush() } + +func (sc *http2serverConn) HeaderEncoder() (*hpack.Encoder, *bytes.Buffer) { + return sc.hpackEncoder, &sc.headerWriteBuf +} + +func (sc *http2serverConn) state(streamID uint32) (http2streamState, *http2stream) { + sc.serveG.check() + // http://tools.ietf.org/html/rfc7540#section-5.1 + if st, ok := sc.streams[streamID]; ok { + return st.state, st + } + // "The first use of a new stream identifier implicitly closes all + // streams in the "idle" state that might have been initiated by + // that peer with a lower-valued stream identifier. For example, if + // a client sends a HEADERS frame on stream 7 without ever sending a + // frame on stream 5, then stream 5 transitions to the "closed" + // state when the first frame for stream 7 is sent or received." + if streamID%2 == 1 { + if streamID <= sc.maxClientStreamID { + return http2stateClosed, nil + } + } else { + if streamID <= sc.maxPushPromiseID { + return http2stateClosed, nil + } + } + return http2stateIdle, nil +} + +// setConnState calls the net/http ConnState hook for this connection, if configured. +// Note that the net/http package does StateNew and StateClosed for us. +// There is currently no plan for StateHijacked or hijacking HTTP/2 connections. +func (sc *http2serverConn) setConnState(state ConnState) { + if sc.hs.ConnState != nil { + sc.hs.ConnState(sc.conn, state) + } +} + +func (sc *http2serverConn) vlogf(format string, args ...interface{}) { + if http2VerboseLogs { + sc.logf(format, args...) + } +} + +func (sc *http2serverConn) logf(format string, args ...interface{}) { + if lg := sc.hs.ErrorLog; lg != nil { + lg.Printf(format, args...) + } else { + log.Printf(format, args...) + } +} + +// errno returns v's underlying uintptr, else 0. +// +// TODO: remove this helper function once http2 can use build +// tags. See comment in isClosedConnError. +func http2errno(v error) uintptr { + if rv := reflect.ValueOf(v); rv.Kind() == reflect.Uintptr { + return uintptr(rv.Uint()) + } + return 0 +} + +// isClosedConnError reports whether err is an error from use of a closed +// network connection. +func http2isClosedConnError(err error) bool { + if err == nil { + return false + } + + if errors.Is(err, net.ErrClosed) { + return true + } + + // TODO(bradfitz): x/tools/cmd/bundle doesn't really support + // build tags, so I can't make an http2_windows.go file with + // Windows-specific stuff. Fix that and move this, once we + // have a way to bundle this into std's net/http somehow. + if runtime.GOOS == "windows" { + if oe, ok := err.(*net.OpError); ok && oe.Op == "read" { + if se, ok := oe.Err.(*os.SyscallError); ok && se.Syscall == "wsarecv" { + const WSAECONNABORTED = 10053 + const WSAECONNRESET = 10054 + if n := http2errno(se.Err); n == WSAECONNRESET || n == WSAECONNABORTED { + return true + } + } + } + } + return false +} + +func (sc *http2serverConn) condlogf(err error, format string, args ...interface{}) { + if err == nil { + return + } + if err == io.EOF || err == io.ErrUnexpectedEOF || http2isClosedConnError(err) || err == http2errPrefaceTimeout { + // Boring, expected errors. + sc.vlogf(format, args...) + } else { + sc.logf(format, args...) + } +} + +// maxCachedCanonicalHeadersKeysSize is an arbitrarily-chosen limit on the size +// of the entries in the canonHeader cache. +// This should be larger than the size of unique, uncommon header keys likely to +// be sent by the peer, while not so high as to permit unreasonable memory usage +// if the peer sends an unbounded number of unique header keys. +const http2maxCachedCanonicalHeadersKeysSize = 2048 + +func (sc *http2serverConn) canonicalHeader(v string) string { + sc.serveG.check() + cv, ok := httpcommon.CachedCanonicalHeader(v) + if ok { + return cv + } + cv, ok = sc.canonHeader[v] + if ok { + return cv + } + if sc.canonHeader == nil { + sc.canonHeader = make(map[string]string) + } + cv = CanonicalHeaderKey(v) + size := 100 + len(v)*2 // 100 bytes of map overhead + key + value + if sc.canonHeaderKeysSize+size <= http2maxCachedCanonicalHeadersKeysSize { + sc.canonHeader[v] = cv + sc.canonHeaderKeysSize += size + } + return cv +} + +type http2readFrameResult struct { + f http2Frame // valid until readMore is called + err error + + // readMore should be called once the consumer no longer needs or + // retains f. After readMore, f is invalid and more frames can be + // read. + readMore func() +} + +// readFrames is the loop that reads incoming frames. +// It takes care to only read one frame at a time, blocking until the +// consumer is done with the frame. +// It's run on its own goroutine. +func (sc *http2serverConn) readFrames() { + gate := make(chan struct{}) + gateDone := func() { gate <- struct{}{} } + for { + f, err := sc.framer.ReadFrame() + select { + case sc.readFrameCh <- http2readFrameResult{f, err, gateDone}: + case <-sc.doneServing: + return + } + select { + case <-gate: + case <-sc.doneServing: + return + } + if http2terminalReadFrameError(err) { + return + } + } +} + +// frameWriteResult is the message passed from writeFrameAsync to the serve goroutine. +type http2frameWriteResult struct { + _ http2incomparable + wr http2FrameWriteRequest // what was written (or attempted) + err error // result of the writeFrame call +} + +// writeFrameAsync runs in its own goroutine and writes a single frame +// and then reports when it's done. +// At most one goroutine can be running writeFrameAsync at a time per +// serverConn. +func (sc *http2serverConn) writeFrameAsync(wr http2FrameWriteRequest, wd *http2writeData) { + var err error + if wd == nil { + err = wr.write.writeFrame(sc) + } else { + err = sc.framer.endWrite() + } + sc.wroteFrameCh <- http2frameWriteResult{wr: wr, err: err} +} + +func (sc *http2serverConn) closeAllStreamsOnConnClose() { + sc.serveG.check() + for _, st := range sc.streams { + sc.closeStream(st, http2errClientDisconnected) + } +} + +func (sc *http2serverConn) stopShutdownTimer() { + sc.serveG.check() + if t := sc.shutdownTimer; t != nil { + t.Stop() + } +} + +func (sc *http2serverConn) notePanic() { + // Note: this is for serverConn.serve panicking, not http.Handler code. + if http2testHookOnPanicMu != nil { + http2testHookOnPanicMu.Lock() + defer http2testHookOnPanicMu.Unlock() + } + if http2testHookOnPanic != nil { + if e := recover(); e != nil { + if http2testHookOnPanic(sc, e) { + panic(e) + } + } + } +} + +func (sc *http2serverConn) serve(conf http2http2Config) { + sc.serveG.check() + defer sc.notePanic() + defer sc.conn.Close() + defer sc.closeAllStreamsOnConnClose() + defer sc.stopShutdownTimer() + defer close(sc.doneServing) // unblocks handlers trying to send + + if http2VerboseLogs { + sc.vlogf("http2: server connection from %v on %p", sc.conn.RemoteAddr(), sc.hs) + } + + settings := http2writeSettings{ + {http2SettingMaxFrameSize, conf.MaxReadFrameSize}, + {http2SettingMaxConcurrentStreams, sc.advMaxStreams}, + {http2SettingMaxHeaderListSize, sc.maxHeaderListSize()}, + {http2SettingHeaderTableSize, conf.MaxDecoderHeaderTableSize}, + {http2SettingInitialWindowSize, uint32(sc.initialStreamRecvWindowSize)}, + } + if !http2disableExtendedConnectProtocol { + settings = append(settings, http2Setting{http2SettingEnableConnectProtocol, 1}) + } + sc.writeFrame(http2FrameWriteRequest{ + write: settings, + }) + sc.unackedSettings++ + + // Each connection starts with initialWindowSize inflow tokens. + // If a higher value is configured, we add more tokens. + if diff := conf.MaxUploadBufferPerConnection - http2initialWindowSize; diff > 0 { + sc.sendWindowUpdate(nil, int(diff)) + } + + if err := sc.readPreface(); err != nil { + sc.condlogf(err, "http2: server: error reading preface from client %v: %v", sc.conn.RemoteAddr(), err) + return + } + // Now that we've got the preface, get us out of the + // "StateNew" state. We can't go directly to idle, though. + // Active means we read some data and anticipate a request. We'll + // do another Active when we get a HEADERS frame. + sc.setConnState(StateActive) + sc.setConnState(StateIdle) + + if sc.srv.IdleTimeout > 0 { + sc.idleTimer = time.AfterFunc(sc.srv.IdleTimeout, sc.onIdleTimer) + defer sc.idleTimer.Stop() + } + + if conf.SendPingTimeout > 0 { + sc.readIdleTimeout = conf.SendPingTimeout + sc.readIdleTimer = time.AfterFunc(conf.SendPingTimeout, sc.onReadIdleTimer) + defer sc.readIdleTimer.Stop() + } + + go sc.readFrames() // closed by defer sc.conn.Close above + + settingsTimer := time.AfterFunc(http2firstSettingsTimeout, sc.onSettingsTimer) + defer settingsTimer.Stop() + + lastFrameTime := time.Now() + loopNum := 0 + for { + loopNum++ + select { + case wr := <-sc.wantWriteFrameCh: + if se, ok := wr.write.(http2StreamError); ok { + sc.resetStream(se) + break + } + sc.writeFrame(wr) + case res := <-sc.wroteFrameCh: + sc.wroteFrame(res) + case res := <-sc.readFrameCh: + lastFrameTime = time.Now() + // Process any written frames before reading new frames from the client since a + // written frame could have triggered a new stream to be started. + if sc.writingFrameAsync { + select { + case wroteRes := <-sc.wroteFrameCh: + sc.wroteFrame(wroteRes) + default: + } + } + if !sc.processFrameFromReader(res) { + return + } + res.readMore() + if settingsTimer != nil { + settingsTimer.Stop() + settingsTimer = nil + } + case m := <-sc.bodyReadCh: + sc.noteBodyRead(m.st, m.n) + case msg := <-sc.serveMsgCh: + switch v := msg.(type) { + case func(int): + v(loopNum) // for testing + case *http2serverMessage: + switch v { + case http2settingsTimerMsg: + sc.logf("timeout waiting for SETTINGS frames from %v", sc.conn.RemoteAddr()) + return + case http2idleTimerMsg: + sc.vlogf("connection is idle") + sc.goAway(http2ErrCodeNo) + case http2readIdleTimerMsg: + sc.handlePingTimer(lastFrameTime) + case http2shutdownTimerMsg: + sc.vlogf("GOAWAY close timer fired; closing conn from %v", sc.conn.RemoteAddr()) + return + case http2gracefulShutdownMsg: + sc.startGracefulShutdownInternal() + case http2handlerDoneMsg: + sc.handlerDone() + default: + panic("unknown timer") + } + case *http2startPushRequest: + sc.startPush(v) + case func(*http2serverConn): + v(sc) + default: + panic(fmt.Sprintf("unexpected type %T", v)) + } + } + + // If the peer is causing us to generate a lot of control frames, + // but not reading them from us, assume they are trying to make us + // run out of memory. + if sc.queuedControlFrames > http2maxQueuedControlFrames { + sc.vlogf("http2: too many control frames in send queue, closing connection") + return + } + + // Start the shutdown timer after sending a GOAWAY. When sending GOAWAY + // with no error code (graceful shutdown), don't start the timer until + // all open streams have been completed. + sentGoAway := sc.inGoAway && !sc.needToSendGoAway && !sc.writingFrame + gracefulShutdownComplete := sc.goAwayCode == http2ErrCodeNo && sc.curOpenStreams() == 0 + if sentGoAway && sc.shutdownTimer == nil && (sc.goAwayCode != http2ErrCodeNo || gracefulShutdownComplete) { + sc.shutDownIn(http2goAwayTimeout) + } + } +} + +func (sc *http2serverConn) handlePingTimer(lastFrameReadTime time.Time) { + if sc.pingSent { + sc.logf("timeout waiting for PING response") + if f := sc.countErrorFunc; f != nil { + f("conn_close_lost_ping") + } + sc.conn.Close() + return + } + + pingAt := lastFrameReadTime.Add(sc.readIdleTimeout) + now := time.Now() + if pingAt.After(now) { + // We received frames since arming the ping timer. + // Reset it for the next possible timeout. + sc.readIdleTimer.Reset(pingAt.Sub(now)) + return + } + + sc.pingSent = true + // Ignore crypto/rand.Read errors: It generally can't fail, and worse case if it does + // is we send a PING frame containing 0s. + _, _ = rand.Read(sc.sentPingData[:]) + sc.writeFrame(http2FrameWriteRequest{ + write: &http2writePing{data: sc.sentPingData}, + }) + sc.readIdleTimer.Reset(sc.pingTimeout) +} + +type http2serverMessage int + +// Message values sent to serveMsgCh. +var ( + http2settingsTimerMsg = new(http2serverMessage) + http2idleTimerMsg = new(http2serverMessage) + http2readIdleTimerMsg = new(http2serverMessage) + http2shutdownTimerMsg = new(http2serverMessage) + http2gracefulShutdownMsg = new(http2serverMessage) + http2handlerDoneMsg = new(http2serverMessage) +) + +func (sc *http2serverConn) onSettingsTimer() { sc.sendServeMsg(http2settingsTimerMsg) } + +func (sc *http2serverConn) onIdleTimer() { sc.sendServeMsg(http2idleTimerMsg) } + +func (sc *http2serverConn) onReadIdleTimer() { sc.sendServeMsg(http2readIdleTimerMsg) } + +func (sc *http2serverConn) onShutdownTimer() { sc.sendServeMsg(http2shutdownTimerMsg) } + +func (sc *http2serverConn) sendServeMsg(msg interface{}) { + sc.serveG.checkNotOn() // NOT + select { + case sc.serveMsgCh <- msg: + case <-sc.doneServing: + } +} + +var http2errPrefaceTimeout = errors.New("timeout waiting for client preface") + +// readPreface reads the ClientPreface greeting from the peer or +// returns errPrefaceTimeout on timeout, or an error if the greeting +// is invalid. +func (sc *http2serverConn) readPreface() error { + if sc.sawClientPreface { + return nil + } + errc := make(chan error, 1) + go func() { + // Read the client preface + buf := make([]byte, len(http2ClientPreface)) + if _, err := io.ReadFull(sc.conn, buf); err != nil { + errc <- err + } else if !bytes.Equal(buf, http2clientPreface) { + errc <- fmt.Errorf("bogus greeting %q", buf) + } else { + errc <- nil + } + }() + timer := time.NewTimer(http2prefaceTimeout) // TODO: configurable on *Server? + defer timer.Stop() + select { + case <-timer.C: + return http2errPrefaceTimeout + case err := <-errc: + if err == nil { + if http2VerboseLogs { + sc.vlogf("http2: server: client %v said hello", sc.conn.RemoteAddr()) + } + } + return err + } +} + +var http2writeDataPool = sync.Pool{ + New: func() interface{} { return new(http2writeData) }, +} + +// writeDataFromHandler writes DATA response frames from a handler on +// the given stream. +func (sc *http2serverConn) writeDataFromHandler(stream *http2stream, data []byte, endStream bool) error { + ch := sc.srv.state.getErrChan() + writeArg := http2writeDataPool.Get().(*http2writeData) + *writeArg = http2writeData{stream.id, data, endStream} + err := sc.writeFrameFromHandler(http2FrameWriteRequest{ + write: writeArg, + stream: stream, + done: ch, + }) + if err != nil { + return err + } + var frameWriteDone bool // the frame write is done (successfully or not) + select { + case err = <-ch: + frameWriteDone = true + case <-sc.doneServing: + return http2errClientDisconnected + case <-stream.cw: + // If both ch and stream.cw were ready (as might + // happen on the final Write after an http.Handler + // ends), prefer the write result. Otherwise this + // might just be us successfully closing the stream. + // The writeFrameAsync and serve goroutines guarantee + // that the ch send will happen before the stream.cw + // close. + select { + case err = <-ch: + frameWriteDone = true + default: + return http2errStreamClosed + } + } + sc.srv.state.putErrChan(ch) + if frameWriteDone { + http2writeDataPool.Put(writeArg) + } + return err +} + +// writeFrameFromHandler sends wr to sc.wantWriteFrameCh, but aborts +// if the connection has gone away. +// +// This must not be run from the serve goroutine itself, else it might +// deadlock writing to sc.wantWriteFrameCh (which is only mildly +// buffered and is read by serve itself). If you're on the serve +// goroutine, call writeFrame instead. +func (sc *http2serverConn) writeFrameFromHandler(wr http2FrameWriteRequest) error { + sc.serveG.checkNotOn() // NOT + select { + case sc.wantWriteFrameCh <- wr: + return nil + case <-sc.doneServing: + // Serve loop is gone. + // Client has closed their connection to the server. + return http2errClientDisconnected + } +} + +// writeFrame schedules a frame to write and sends it if there's nothing +// already being written. +// +// There is no pushback here (the serve goroutine never blocks). It's +// the http.Handlers that block, waiting for their previous frames to +// make it onto the wire +// +// If you're not on the serve goroutine, use writeFrameFromHandler instead. +func (sc *http2serverConn) writeFrame(wr http2FrameWriteRequest) { + sc.serveG.check() + + // If true, wr will not be written and wr.done will not be signaled. + var ignoreWrite bool + + // We are not allowed to write frames on closed streams. RFC 7540 Section + // 5.1.1 says: "An endpoint MUST NOT send frames other than PRIORITY on + // a closed stream." Our server never sends PRIORITY, so that exception + // does not apply. + // + // The serverConn might close an open stream while the stream's handler + // is still running. For example, the server might close a stream when it + // receives bad data from the client. If this happens, the handler might + // attempt to write a frame after the stream has been closed (since the + // handler hasn't yet been notified of the close). In this case, we simply + // ignore the frame. The handler will notice that the stream is closed when + // it waits for the frame to be written. + // + // As an exception to this rule, we allow sending RST_STREAM after close. + // This allows us to immediately reject new streams without tracking any + // state for those streams (except for the queued RST_STREAM frame). This + // may result in duplicate RST_STREAMs in some cases, but the client should + // ignore those. + if wr.StreamID() != 0 { + _, isReset := wr.write.(http2StreamError) + if state, _ := sc.state(wr.StreamID()); state == http2stateClosed && !isReset { + ignoreWrite = true + } + } + + // Don't send a 100-continue response if we've already sent headers. + // See golang.org/issue/14030. + switch wr.write.(type) { + case *http2writeResHeaders: + wr.stream.wroteHeaders = true + case http2write100ContinueHeadersFrame: + if wr.stream.wroteHeaders { + // We do not need to notify wr.done because this frame is + // never written with wr.done != nil. + if wr.done != nil { + panic("wr.done != nil for write100ContinueHeadersFrame") + } + ignoreWrite = true + } + } + + if !ignoreWrite { + if wr.isControl() { + sc.queuedControlFrames++ + // For extra safety, detect wraparounds, which should not happen, + // and pull the plug. + if sc.queuedControlFrames < 0 { + sc.conn.Close() + } + } + sc.writeSched.Push(wr) + } + sc.scheduleFrameWrite() +} + +// startFrameWrite starts a goroutine to write wr (in a separate +// goroutine since that might block on the network), and updates the +// serve goroutine's state about the world, updated from info in wr. +func (sc *http2serverConn) startFrameWrite(wr http2FrameWriteRequest) { + sc.serveG.check() + if sc.writingFrame { + panic("internal error: can only be writing one frame at a time") + } + + st := wr.stream + if st != nil { + switch st.state { + case http2stateHalfClosedLocal: + switch wr.write.(type) { + case http2StreamError, http2handlerPanicRST, http2writeWindowUpdate: + // RFC 7540 Section 5.1 allows sending RST_STREAM, PRIORITY, and WINDOW_UPDATE + // in this state. (We never send PRIORITY from the server, so that is not checked.) + default: + panic(fmt.Sprintf("internal error: attempt to send frame on a half-closed-local stream: %v", wr)) + } + case http2stateClosed: + panic(fmt.Sprintf("internal error: attempt to send frame on a closed stream: %v", wr)) + } + } + if wpp, ok := wr.write.(*http2writePushPromise); ok { + var err error + wpp.promisedID, err = wpp.allocatePromisedID() + if err != nil { + sc.writingFrameAsync = false + wr.replyToWriter(err) + return + } + } + + sc.writingFrame = true + sc.needsFrameFlush = true + if wr.write.staysWithinBuffer(sc.bw.Available()) { + sc.writingFrameAsync = false + err := wr.write.writeFrame(sc) + sc.wroteFrame(http2frameWriteResult{wr: wr, err: err}) + } else if wd, ok := wr.write.(*http2writeData); ok { + // Encode the frame in the serve goroutine, to ensure we don't have + // any lingering asynchronous references to data passed to Write. + // See https://go.dev/issue/58446. + sc.framer.startWriteDataPadded(wd.streamID, wd.endStream, wd.p, nil) + sc.writingFrameAsync = true + go sc.writeFrameAsync(wr, wd) + } else { + sc.writingFrameAsync = true + go sc.writeFrameAsync(wr, nil) + } +} + +// errHandlerPanicked is the error given to any callers blocked in a read from +// Request.Body when the main goroutine panics. Since most handlers read in the +// main ServeHTTP goroutine, this will show up rarely. +var http2errHandlerPanicked = errors.New("http2: handler panicked") + +// wroteFrame is called on the serve goroutine with the result of +// whatever happened on writeFrameAsync. +func (sc *http2serverConn) wroteFrame(res http2frameWriteResult) { + sc.serveG.check() + if !sc.writingFrame { + panic("internal error: expected to be already writing a frame") + } + sc.writingFrame = false + sc.writingFrameAsync = false + + if res.err != nil { + sc.conn.Close() + } + + wr := res.wr + + if http2writeEndsStream(wr.write) { + st := wr.stream + if st == nil { + panic("internal error: expecting non-nil stream") + } + switch st.state { + case http2stateOpen: + // Here we would go to stateHalfClosedLocal in + // theory, but since our handler is done and + // the net/http package provides no mechanism + // for closing a ResponseWriter while still + // reading data (see possible TODO at top of + // this file), we go into closed state here + // anyway, after telling the peer we're + // hanging up on them. We'll transition to + // stateClosed after the RST_STREAM frame is + // written. + st.state = http2stateHalfClosedLocal + // Section 8.1: a server MAY request that the client abort + // transmission of a request without error by sending a + // RST_STREAM with an error code of NO_ERROR after sending + // a complete response. + sc.resetStream(http2streamError(st.id, http2ErrCodeNo)) + case http2stateHalfClosedRemote: + sc.closeStream(st, http2errHandlerComplete) + } + } else { + switch v := wr.write.(type) { + case http2StreamError: + // st may be unknown if the RST_STREAM was generated to reject bad input. + if st, ok := sc.streams[v.StreamID]; ok { + sc.closeStream(st, v) + } + case http2handlerPanicRST: + sc.closeStream(wr.stream, http2errHandlerPanicked) + } + } + + // Reply (if requested) to unblock the ServeHTTP goroutine. + wr.replyToWriter(res.err) + + sc.scheduleFrameWrite() +} + +// scheduleFrameWrite tickles the frame writing scheduler. +// +// If a frame is already being written, nothing happens. This will be called again +// when the frame is done being written. +// +// If a frame isn't being written and we need to send one, the best frame +// to send is selected by writeSched. +// +// If a frame isn't being written and there's nothing else to send, we +// flush the write buffer. +func (sc *http2serverConn) scheduleFrameWrite() { + sc.serveG.check() + if sc.writingFrame || sc.inFrameScheduleLoop { + return + } + sc.inFrameScheduleLoop = true + for !sc.writingFrameAsync { + if sc.needToSendGoAway { + sc.needToSendGoAway = false + sc.startFrameWrite(http2FrameWriteRequest{ + write: &http2writeGoAway{ + maxStreamID: sc.maxClientStreamID, + code: sc.goAwayCode, + }, + }) + continue + } + if sc.needToSendSettingsAck { + sc.needToSendSettingsAck = false + sc.startFrameWrite(http2FrameWriteRequest{write: http2writeSettingsAck{}}) + continue + } + if !sc.inGoAway || sc.goAwayCode == http2ErrCodeNo { + if wr, ok := sc.writeSched.Pop(); ok { + if wr.isControl() { + sc.queuedControlFrames-- + } + sc.startFrameWrite(wr) + continue + } + } + if sc.needsFrameFlush { + sc.startFrameWrite(http2FrameWriteRequest{write: http2flushFrameWriter{}}) + sc.needsFrameFlush = false // after startFrameWrite, since it sets this true + continue + } + break + } + sc.inFrameScheduleLoop = false +} + +// startGracefulShutdown gracefully shuts down a connection. This +// sends GOAWAY with ErrCodeNo to tell the client we're gracefully +// shutting down. The connection isn't closed until all current +// streams are done. +// +// startGracefulShutdown returns immediately; it does not wait until +// the connection has shut down. +func (sc *http2serverConn) startGracefulShutdown() { + sc.serveG.checkNotOn() // NOT + sc.shutdownOnce.Do(func() { sc.sendServeMsg(http2gracefulShutdownMsg) }) +} + +// After sending GOAWAY with an error code (non-graceful shutdown), the +// connection will close after goAwayTimeout. +// +// If we close the connection immediately after sending GOAWAY, there may +// be unsent data in our kernel receive buffer, which will cause the kernel +// to send a TCP RST on close() instead of a FIN. This RST will abort the +// connection immediately, whether or not the client had received the GOAWAY. +// +// Ideally we should delay for at least 1 RTT + epsilon so the client has +// a chance to read the GOAWAY and stop sending messages. Measuring RTT +// is hard, so we approximate with 1 second. See golang.org/issue/18701. +// +// This is a var so it can be shorter in tests, where all requests uses the +// loopback interface making the expected RTT very small. +// +// TODO: configurable? +var http2goAwayTimeout = 1 * time.Second + +func (sc *http2serverConn) startGracefulShutdownInternal() { + sc.goAway(http2ErrCodeNo) +} + +func (sc *http2serverConn) goAway(code http2ErrCode) { + sc.serveG.check() + if sc.inGoAway { + if sc.goAwayCode == http2ErrCodeNo { + sc.goAwayCode = code + } + return + } + sc.inGoAway = true + sc.needToSendGoAway = true + sc.goAwayCode = code + sc.scheduleFrameWrite() +} + +func (sc *http2serverConn) shutDownIn(d time.Duration) { + sc.serveG.check() + sc.shutdownTimer = time.AfterFunc(d, sc.onShutdownTimer) +} + +func (sc *http2serverConn) resetStream(se http2StreamError) { + sc.serveG.check() + sc.writeFrame(http2FrameWriteRequest{write: se}) + if st, ok := sc.streams[se.StreamID]; ok { + st.resetQueued = true + } +} + +// processFrameFromReader processes the serve loop's read from readFrameCh from the +// frame-reading goroutine. +// processFrameFromReader returns whether the connection should be kept open. +func (sc *http2serverConn) processFrameFromReader(res http2readFrameResult) bool { + sc.serveG.check() + err := res.err + if err != nil { + if err == http2ErrFrameTooLarge { + sc.goAway(http2ErrCodeFrameSize) + return true // goAway will close the loop + } + clientGone := err == io.EOF || err == io.ErrUnexpectedEOF || http2isClosedConnError(err) + if clientGone { + // TODO: could we also get into this state if + // the peer does a half close + // (e.g. CloseWrite) because they're done + // sending frames but they're still wanting + // our open replies? Investigate. + // TODO: add CloseWrite to crypto/tls.Conn first + // so we have a way to test this? I suppose + // just for testing we could have a non-TLS mode. + return false + } + } else { + f := res.f + if http2VerboseLogs { + sc.vlogf("http2: server read frame %v", http2summarizeFrame(f)) + } + err = sc.processFrame(f) + if err == nil { + return true + } + } + + switch ev := err.(type) { + case http2StreamError: + sc.resetStream(ev) + return true + case http2goAwayFlowError: + sc.goAway(http2ErrCodeFlowControl) + return true + case http2ConnectionError: + if res.f != nil { + if id := res.f.Header().StreamID; id > sc.maxClientStreamID { + sc.maxClientStreamID = id + } + } + sc.logf("http2: server connection error from %v: %v", sc.conn.RemoteAddr(), ev) + sc.goAway(http2ErrCode(ev)) + return true // goAway will handle shutdown + default: + if res.err != nil { + sc.vlogf("http2: server closing client connection; error reading frame from client %s: %v", sc.conn.RemoteAddr(), err) + } else { + sc.logf("http2: server closing client connection: %v", err) + } + return false + } +} + +func (sc *http2serverConn) processFrame(f http2Frame) error { + sc.serveG.check() + + // First frame received must be SETTINGS. + if !sc.sawFirstSettings { + if _, ok := f.(*http2SettingsFrame); !ok { + return sc.countError("first_settings", http2ConnectionError(http2ErrCodeProtocol)) + } + sc.sawFirstSettings = true + } + + // Discard frames for streams initiated after the identified last + // stream sent in a GOAWAY, or all frames after sending an error. + // We still need to return connection-level flow control for DATA frames. + // RFC 9113 Section 6.8. + if sc.inGoAway && (sc.goAwayCode != http2ErrCodeNo || f.Header().StreamID > sc.maxClientStreamID) { + + if f, ok := f.(*http2DataFrame); ok { + if !sc.inflow.take(f.Length) { + return sc.countError("data_flow", http2streamError(f.Header().StreamID, http2ErrCodeFlowControl)) + } + sc.sendWindowUpdate(nil, int(f.Length)) // conn-level + } + return nil + } + + switch f := f.(type) { + case *http2SettingsFrame: + return sc.processSettings(f) + case *http2MetaHeadersFrame: + return sc.processHeaders(f) + case *http2WindowUpdateFrame: + return sc.processWindowUpdate(f) + case *http2PingFrame: + return sc.processPing(f) + case *http2DataFrame: + return sc.processData(f) + case *http2RSTStreamFrame: + return sc.processResetStream(f) + case *http2PriorityFrame: + return sc.processPriority(f) + case *http2GoAwayFrame: + return sc.processGoAway(f) + case *http2PushPromiseFrame: + // A client cannot push. Thus, servers MUST treat the receipt of a PUSH_PROMISE + // frame as a connection error (Section 5.4.1) of type PROTOCOL_ERROR. + return sc.countError("push_promise", http2ConnectionError(http2ErrCodeProtocol)) + default: + sc.vlogf("http2: server ignoring frame: %v", f.Header()) + return nil + } +} + +func (sc *http2serverConn) processPing(f *http2PingFrame) error { + sc.serveG.check() + if f.IsAck() { + if sc.pingSent && sc.sentPingData == f.Data { + // This is a response to a PING we sent. + sc.pingSent = false + sc.readIdleTimer.Reset(sc.readIdleTimeout) + } + // 6.7 PING: " An endpoint MUST NOT respond to PING frames + // containing this flag." + return nil + } + if f.StreamID != 0 { + // "PING frames are not associated with any individual + // stream. If a PING frame is received with a stream + // identifier field value other than 0x0, the recipient MUST + // respond with a connection error (Section 5.4.1) of type + // PROTOCOL_ERROR." + return sc.countError("ping_on_stream", http2ConnectionError(http2ErrCodeProtocol)) + } + sc.writeFrame(http2FrameWriteRequest{write: http2writePingAck{f}}) + return nil +} + +func (sc *http2serverConn) processWindowUpdate(f *http2WindowUpdateFrame) error { + sc.serveG.check() + switch { + case f.StreamID != 0: // stream-level flow control + state, st := sc.state(f.StreamID) + if state == http2stateIdle { + // Section 5.1: "Receiving any frame other than HEADERS + // or PRIORITY on a stream in this state MUST be + // treated as a connection error (Section 5.4.1) of + // type PROTOCOL_ERROR." + return sc.countError("stream_idle", http2ConnectionError(http2ErrCodeProtocol)) + } + if st == nil { + // "WINDOW_UPDATE can be sent by a peer that has sent a + // frame bearing the END_STREAM flag. This means that a + // receiver could receive a WINDOW_UPDATE frame on a "half + // closed (remote)" or "closed" stream. A receiver MUST + // NOT treat this as an error, see Section 5.1." + return nil + } + if !st.flow.add(int32(f.Increment)) { + return sc.countError("bad_flow", http2streamError(f.StreamID, http2ErrCodeFlowControl)) + } + default: // connection-level flow control + if !sc.flow.add(int32(f.Increment)) { + return http2goAwayFlowError{} + } + } + sc.scheduleFrameWrite() + return nil +} + +func (sc *http2serverConn) processResetStream(f *http2RSTStreamFrame) error { + sc.serveG.check() + + state, st := sc.state(f.StreamID) + if state == http2stateIdle { + // 6.4 "RST_STREAM frames MUST NOT be sent for a + // stream in the "idle" state. If a RST_STREAM frame + // identifying an idle stream is received, the + // recipient MUST treat this as a connection error + // (Section 5.4.1) of type PROTOCOL_ERROR. + return sc.countError("reset_idle_stream", http2ConnectionError(http2ErrCodeProtocol)) + } + if st != nil { + st.cancelCtx() + sc.closeStream(st, http2streamError(f.StreamID, f.ErrCode)) + } + return nil +} + +func (sc *http2serverConn) closeStream(st *http2stream, err error) { + sc.serveG.check() + if st.state == http2stateIdle || st.state == http2stateClosed { + panic(fmt.Sprintf("invariant; can't close stream in state %v", st.state)) + } + st.state = http2stateClosed + if st.readDeadline != nil { + st.readDeadline.Stop() + } + if st.writeDeadline != nil { + st.writeDeadline.Stop() + } + if st.isPushed() { + sc.curPushedStreams-- + } else { + sc.curClientStreams-- + } + delete(sc.streams, st.id) + if len(sc.streams) == 0 { + sc.setConnState(StateIdle) + if sc.srv.IdleTimeout > 0 && sc.idleTimer != nil { + sc.idleTimer.Reset(sc.srv.IdleTimeout) + } + if http2h1ServerKeepAlivesDisabled(sc.hs) { + sc.startGracefulShutdownInternal() + } + } + if p := st.body; p != nil { + // Return any buffered unread bytes worth of conn-level flow control. + // See golang.org/issue/16481 + sc.sendWindowUpdate(nil, p.Len()) + + p.CloseWithError(err) + } + if e, ok := err.(http2StreamError); ok { + if e.Cause != nil { + err = e.Cause + } else { + err = http2errStreamClosed + } + } + st.closeErr = err + st.cancelCtx() + st.cw.Close() // signals Handler's CloseNotifier, unblocks writes, etc + sc.writeSched.CloseStream(st.id) +} + +func (sc *http2serverConn) processSettings(f *http2SettingsFrame) error { + sc.serveG.check() + if f.IsAck() { + sc.unackedSettings-- + if sc.unackedSettings < 0 { + // Why is the peer ACKing settings we never sent? + // The spec doesn't mention this case, but + // hang up on them anyway. + return sc.countError("ack_mystery", http2ConnectionError(http2ErrCodeProtocol)) + } + return nil + } + if f.NumSettings() > 100 || f.HasDuplicates() { + // This isn't actually in the spec, but hang up on + // suspiciously large settings frames or those with + // duplicate entries. + return sc.countError("settings_big_or_dups", http2ConnectionError(http2ErrCodeProtocol)) + } + if err := f.ForeachSetting(sc.processSetting); err != nil { + return err + } + // TODO: judging by RFC 7540, Section 6.5.3 each SETTINGS frame should be + // acknowledged individually, even if multiple are received before the ACK. + sc.needToSendSettingsAck = true + sc.scheduleFrameWrite() + return nil +} + +func (sc *http2serverConn) processSetting(s http2Setting) error { + sc.serveG.check() + if err := s.Valid(); err != nil { + return err + } + if http2VerboseLogs { + sc.vlogf("http2: server processing setting %v", s) + } + switch s.ID { + case http2SettingHeaderTableSize: + sc.hpackEncoder.SetMaxDynamicTableSize(s.Val) + case http2SettingEnablePush: + sc.pushEnabled = s.Val != 0 + case http2SettingMaxConcurrentStreams: + sc.clientMaxStreams = s.Val + case http2SettingInitialWindowSize: + return sc.processSettingInitialWindowSize(s.Val) + case http2SettingMaxFrameSize: + sc.maxFrameSize = int32(s.Val) // the maximum valid s.Val is < 2^31 + case http2SettingMaxHeaderListSize: + sc.peerMaxHeaderListSize = s.Val + case http2SettingEnableConnectProtocol: + // Receipt of this parameter by a server does not + // have any impact + default: + // Unknown setting: "An endpoint that receives a SETTINGS + // frame with any unknown or unsupported identifier MUST + // ignore that setting." + if http2VerboseLogs { + sc.vlogf("http2: server ignoring unknown setting %v", s) + } + } + return nil +} + +func (sc *http2serverConn) processSettingInitialWindowSize(val uint32) error { + sc.serveG.check() + // Note: val already validated to be within range by + // processSetting's Valid call. + + // "A SETTINGS frame can alter the initial flow control window + // size for all current streams. When the value of + // SETTINGS_INITIAL_WINDOW_SIZE changes, a receiver MUST + // adjust the size of all stream flow control windows that it + // maintains by the difference between the new value and the + // old value." + old := sc.initialStreamSendWindowSize + sc.initialStreamSendWindowSize = int32(val) + growth := int32(val) - old // may be negative + for _, st := range sc.streams { + if !st.flow.add(growth) { + // 6.9.2 Initial Flow Control Window Size + // "An endpoint MUST treat a change to + // SETTINGS_INITIAL_WINDOW_SIZE that causes any flow + // control window to exceed the maximum size as a + // connection error (Section 5.4.1) of type + // FLOW_CONTROL_ERROR." + return sc.countError("setting_win_size", http2ConnectionError(http2ErrCodeFlowControl)) + } + } + return nil +} + +func (sc *http2serverConn) processData(f *http2DataFrame) error { + sc.serveG.check() + id := f.Header().StreamID + + data := f.Data() + state, st := sc.state(id) + if id == 0 || state == http2stateIdle { + // Section 6.1: "DATA frames MUST be associated with a + // stream. If a DATA frame is received whose stream + // identifier field is 0x0, the recipient MUST respond + // with a connection error (Section 5.4.1) of type + // PROTOCOL_ERROR." + // + // Section 5.1: "Receiving any frame other than HEADERS + // or PRIORITY on a stream in this state MUST be + // treated as a connection error (Section 5.4.1) of + // type PROTOCOL_ERROR." + return sc.countError("data_on_idle", http2ConnectionError(http2ErrCodeProtocol)) + } + + // "If a DATA frame is received whose stream is not in "open" + // or "half closed (local)" state, the recipient MUST respond + // with a stream error (Section 5.4.2) of type STREAM_CLOSED." + if st == nil || state != http2stateOpen || st.gotTrailerHeader || st.resetQueued { + // This includes sending a RST_STREAM if the stream is + // in stateHalfClosedLocal (which currently means that + // the http.Handler returned, so it's done reading & + // done writing). Try to stop the client from sending + // more DATA. + + // But still enforce their connection-level flow control, + // and return any flow control bytes since we're not going + // to consume them. + if !sc.inflow.take(f.Length) { + return sc.countError("data_flow", http2streamError(id, http2ErrCodeFlowControl)) + } + sc.sendWindowUpdate(nil, int(f.Length)) // conn-level + + if st != nil && st.resetQueued { + // Already have a stream error in flight. Don't send another. + return nil + } + return sc.countError("closed", http2streamError(id, http2ErrCodeStreamClosed)) + } + if st.body == nil { + panic("internal error: should have a body in this state") + } + + // Sender sending more than they'd declared? + if st.declBodyBytes != -1 && st.bodyBytes+int64(len(data)) > st.declBodyBytes { + if !sc.inflow.take(f.Length) { + return sc.countError("data_flow", http2streamError(id, http2ErrCodeFlowControl)) + } + sc.sendWindowUpdate(nil, int(f.Length)) // conn-level + + st.body.CloseWithError(fmt.Errorf("sender tried to send more than declared Content-Length of %d bytes", st.declBodyBytes)) + // RFC 7540, sec 8.1.2.6: A request or response is also malformed if the + // value of a content-length header field does not equal the sum of the + // DATA frame payload lengths that form the body. + return sc.countError("send_too_much", http2streamError(id, http2ErrCodeProtocol)) + } + if f.Length > 0 { + // Check whether the client has flow control quota. + if !http2takeInflows(&sc.inflow, &st.inflow, f.Length) { + return sc.countError("flow_on_data_length", http2streamError(id, http2ErrCodeFlowControl)) + } + + if len(data) > 0 { + st.bodyBytes += int64(len(data)) + wrote, err := st.body.Write(data) + if err != nil { + // The handler has closed the request body. + // Return the connection-level flow control for the discarded data, + // but not the stream-level flow control. + sc.sendWindowUpdate(nil, int(f.Length)-wrote) + return nil + } + if wrote != len(data) { + panic("internal error: bad Writer") + } + } + + // Return any padded flow control now, since we won't + // refund it later on body reads. + // Call sendWindowUpdate even if there is no padding, + // to return buffered flow control credit if the sent + // window has shrunk. + pad := int32(f.Length) - int32(len(data)) + sc.sendWindowUpdate32(nil, pad) + sc.sendWindowUpdate32(st, pad) + } + if f.StreamEnded() { + st.endStream() + } + return nil +} + +func (sc *http2serverConn) processGoAway(f *http2GoAwayFrame) error { + sc.serveG.check() + if f.ErrCode != http2ErrCodeNo { + sc.logf("http2: received GOAWAY %+v, starting graceful shutdown", f) + } else { + sc.vlogf("http2: received GOAWAY %+v, starting graceful shutdown", f) + } + sc.startGracefulShutdownInternal() + // http://tools.ietf.org/html/rfc7540#section-6.8 + // We should not create any new streams, which means we should disable push. + sc.pushEnabled = false + return nil +} + +// isPushed reports whether the stream is server-initiated. +func (st *http2stream) isPushed() bool { + return st.id%2 == 0 +} + +// endStream closes a Request.Body's pipe. It is called when a DATA +// frame says a request body is over (or after trailers). +func (st *http2stream) endStream() { + sc := st.sc + sc.serveG.check() + + if st.declBodyBytes != -1 && st.declBodyBytes != st.bodyBytes { + st.body.CloseWithError(fmt.Errorf("request declared a Content-Length of %d but only wrote %d bytes", + st.declBodyBytes, st.bodyBytes)) + } else { + st.body.closeWithErrorAndCode(io.EOF, st.copyTrailersToHandlerRequest) + st.body.CloseWithError(io.EOF) + } + st.state = http2stateHalfClosedRemote +} + +// copyTrailersToHandlerRequest is run in the Handler's goroutine in +// its Request.Body.Read just before it gets io.EOF. +func (st *http2stream) copyTrailersToHandlerRequest() { + for k, vv := range st.trailer { + if _, ok := st.reqTrailer[k]; ok { + // Only copy it over it was pre-declared. + st.reqTrailer[k] = vv + } + } +} + +// onReadTimeout is run on its own goroutine (from time.AfterFunc) +// when the stream's ReadTimeout has fired. +func (st *http2stream) onReadTimeout() { + if st.body != nil { + // Wrap the ErrDeadlineExceeded to avoid callers depending on us + // returning the bare error. + st.body.CloseWithError(fmt.Errorf("%w", os.ErrDeadlineExceeded)) + } +} + +// onWriteTimeout is run on its own goroutine (from time.AfterFunc) +// when the stream's WriteTimeout has fired. +func (st *http2stream) onWriteTimeout() { + st.sc.writeFrameFromHandler(http2FrameWriteRequest{write: http2StreamError{ + StreamID: st.id, + Code: http2ErrCodeInternal, + Cause: os.ErrDeadlineExceeded, + }}) +} + +func (sc *http2serverConn) processHeaders(f *http2MetaHeadersFrame) error { + sc.serveG.check() + id := f.StreamID + // http://tools.ietf.org/html/rfc7540#section-5.1.1 + // Streams initiated by a client MUST use odd-numbered stream + // identifiers. [...] An endpoint that receives an unexpected + // stream identifier MUST respond with a connection error + // (Section 5.4.1) of type PROTOCOL_ERROR. + if id%2 != 1 { + return sc.countError("headers_even", http2ConnectionError(http2ErrCodeProtocol)) + } + // A HEADERS frame can be used to create a new stream or + // send a trailer for an open one. If we already have a stream + // open, let it process its own HEADERS frame (trailers at this + // point, if it's valid). + if st := sc.streams[f.StreamID]; st != nil { + if st.resetQueued { + // We're sending RST_STREAM to close the stream, so don't bother + // processing this frame. + return nil + } + // RFC 7540, sec 5.1: If an endpoint receives additional frames, other than + // WINDOW_UPDATE, PRIORITY, or RST_STREAM, for a stream that is in + // this state, it MUST respond with a stream error (Section 5.4.2) of + // type STREAM_CLOSED. + if st.state == http2stateHalfClosedRemote { + return sc.countError("headers_half_closed", http2streamError(id, http2ErrCodeStreamClosed)) + } + return st.processTrailerHeaders(f) + } + + // [...] The identifier of a newly established stream MUST be + // numerically greater than all streams that the initiating + // endpoint has opened or reserved. [...] An endpoint that + // receives an unexpected stream identifier MUST respond with + // a connection error (Section 5.4.1) of type PROTOCOL_ERROR. + if id <= sc.maxClientStreamID { + return sc.countError("stream_went_down", http2ConnectionError(http2ErrCodeProtocol)) + } + sc.maxClientStreamID = id + + if sc.idleTimer != nil { + sc.idleTimer.Stop() + } + + // http://tools.ietf.org/html/rfc7540#section-5.1.2 + // [...] Endpoints MUST NOT exceed the limit set by their peer. An + // endpoint that receives a HEADERS frame that causes their + // advertised concurrent stream limit to be exceeded MUST treat + // this as a stream error (Section 5.4.2) of type PROTOCOL_ERROR + // or REFUSED_STREAM. + if sc.curClientStreams+1 > sc.advMaxStreams { + if sc.unackedSettings == 0 { + // They should know better. + return sc.countError("over_max_streams", http2streamError(id, http2ErrCodeProtocol)) + } + // Assume it's a network race, where they just haven't + // received our last SETTINGS update. But actually + // this can't happen yet, because we don't yet provide + // a way for users to adjust server parameters at + // runtime. + return sc.countError("over_max_streams_race", http2streamError(id, http2ErrCodeRefusedStream)) + } + + initialState := http2stateOpen + if f.StreamEnded() { + initialState = http2stateHalfClosedRemote + } + st := sc.newStream(id, 0, initialState) + + if f.HasPriority() { + if err := sc.checkPriority(f.StreamID, f.Priority); err != nil { + return err + } + sc.writeSched.AdjustStream(st.id, f.Priority) + } + + rw, req, err := sc.newWriterAndRequest(st, f) + if err != nil { + return err + } + st.reqTrailer = req.Trailer + if st.reqTrailer != nil { + st.trailer = make(Header) + } + st.body = req.Body.(*http2requestBody).pipe // may be nil + st.declBodyBytes = req.ContentLength + + handler := sc.handler.ServeHTTP + if f.Truncated { + // Their header list was too long. Send a 431 error. + handler = http2handleHeaderListTooLong + } else if err := http2checkValidHTTP2RequestHeaders(req.Header); err != nil { + handler = http2new400Handler(err) + } + + // The net/http package sets the read deadline from the + // http.Server.ReadTimeout during the TLS handshake, but then + // passes the connection off to us with the deadline already + // set. Disarm it here after the request headers are read, + // similar to how the http1 server works. Here it's + // technically more like the http1 Server's ReadHeaderTimeout + // (in Go 1.8), though. That's a more sane option anyway. + if sc.hs.ReadTimeout > 0 { + sc.conn.SetReadDeadline(time.Time{}) + st.readDeadline = time.AfterFunc(sc.hs.ReadTimeout, st.onReadTimeout) + } + + return sc.scheduleHandler(id, rw, req, handler) +} + +func (sc *http2serverConn) upgradeRequest(req *Request) { + sc.serveG.check() + id := uint32(1) + sc.maxClientStreamID = id + st := sc.newStream(id, 0, http2stateHalfClosedRemote) + st.reqTrailer = req.Trailer + if st.reqTrailer != nil { + st.trailer = make(Header) + } + rw := sc.newResponseWriter(st, req) + + // Disable any read deadline set by the net/http package + // prior to the upgrade. + if sc.hs.ReadTimeout > 0 { + sc.conn.SetReadDeadline(time.Time{}) + } + + // This is the first request on the connection, + // so start the handler directly rather than going + // through scheduleHandler. + sc.curHandlers++ + go sc.runHandler(rw, req, sc.handler.ServeHTTP) +} + +func (st *http2stream) processTrailerHeaders(f *http2MetaHeadersFrame) error { + sc := st.sc + sc.serveG.check() + if st.gotTrailerHeader { + return sc.countError("dup_trailers", http2ConnectionError(http2ErrCodeProtocol)) + } + st.gotTrailerHeader = true + if !f.StreamEnded() { + return sc.countError("trailers_not_ended", http2streamError(st.id, http2ErrCodeProtocol)) + } + + if len(f.PseudoFields()) > 0 { + return sc.countError("trailers_pseudo", http2streamError(st.id, http2ErrCodeProtocol)) + } + if st.trailer != nil { + for _, hf := range f.RegularFields() { + key := sc.canonicalHeader(hf.Name) + if !httpguts.ValidTrailerHeader(key) { + // TODO: send more details to the peer somehow. But http2 has + // no way to send debug data at a stream level. Discuss with + // HTTP folk. + return sc.countError("trailers_bogus", http2streamError(st.id, http2ErrCodeProtocol)) + } + st.trailer[key] = append(st.trailer[key], hf.Value) + } + } + st.endStream() + return nil +} + +func (sc *http2serverConn) checkPriority(streamID uint32, p http2PriorityParam) error { + if streamID == p.StreamDep { + // Section 5.3.1: "A stream cannot depend on itself. An endpoint MUST treat + // this as a stream error (Section 5.4.2) of type PROTOCOL_ERROR." + // Section 5.3.3 says that a stream can depend on one of its dependencies, + // so it's only self-dependencies that are forbidden. + return sc.countError("priority", http2streamError(streamID, http2ErrCodeProtocol)) + } + return nil +} + +func (sc *http2serverConn) processPriority(f *http2PriorityFrame) error { + if err := sc.checkPriority(f.StreamID, f.http2PriorityParam); err != nil { + return err + } + sc.writeSched.AdjustStream(f.StreamID, f.http2PriorityParam) + return nil +} + +func (sc *http2serverConn) newStream(id, pusherID uint32, state http2streamState) *http2stream { + sc.serveG.check() + if id == 0 { + panic("internal error: cannot create stream with id 0") + } + + ctx, cancelCtx := context.WithCancel(sc.baseCtx) + st := &http2stream{ + sc: sc, + id: id, + state: state, + ctx: ctx, + cancelCtx: cancelCtx, + } + st.cw.Init() + st.flow.conn = &sc.flow // link to conn-level counter + st.flow.add(sc.initialStreamSendWindowSize) + st.inflow.init(sc.initialStreamRecvWindowSize) + if sc.hs.WriteTimeout > 0 { + st.writeDeadline = time.AfterFunc(sc.hs.WriteTimeout, st.onWriteTimeout) + } + + sc.streams[id] = st + sc.writeSched.OpenStream(st.id, http2OpenStreamOptions{PusherID: pusherID}) + if st.isPushed() { + sc.curPushedStreams++ + } else { + sc.curClientStreams++ + } + if sc.curOpenStreams() == 1 { + sc.setConnState(StateActive) + } + + return st +} + +func (sc *http2serverConn) newWriterAndRequest(st *http2stream, f *http2MetaHeadersFrame) (*http2responseWriter, *Request, error) { + sc.serveG.check() + + rp := httpcommon.ServerRequestParam{ + Method: f.PseudoValue("method"), + Scheme: f.PseudoValue("scheme"), + Authority: f.PseudoValue("authority"), + Path: f.PseudoValue("path"), + Protocol: f.PseudoValue("protocol"), + } + + // extended connect is disabled, so we should not see :protocol + if http2disableExtendedConnectProtocol && rp.Protocol != "" { + return nil, nil, sc.countError("bad_connect", http2streamError(f.StreamID, http2ErrCodeProtocol)) + } + + isConnect := rp.Method == "CONNECT" + if isConnect { + if rp.Protocol == "" && (rp.Path != "" || rp.Scheme != "" || rp.Authority == "") { + return nil, nil, sc.countError("bad_connect", http2streamError(f.StreamID, http2ErrCodeProtocol)) + } + } else if rp.Method == "" || rp.Path == "" || (rp.Scheme != "https" && rp.Scheme != "http") { + // See 8.1.2.6 Malformed Requests and Responses: + // + // Malformed requests or responses that are detected + // MUST be treated as a stream error (Section 5.4.2) + // of type PROTOCOL_ERROR." + // + // 8.1.2.3 Request Pseudo-Header Fields + // "All HTTP/2 requests MUST include exactly one valid + // value for the :method, :scheme, and :path + // pseudo-header fields" + return nil, nil, sc.countError("bad_path_method", http2streamError(f.StreamID, http2ErrCodeProtocol)) + } + + header := make(Header) + rp.Header = header + for _, hf := range f.RegularFields() { + header.Add(sc.canonicalHeader(hf.Name), hf.Value) + } + if rp.Authority == "" { + rp.Authority = header.Get("Host") + } + if rp.Protocol != "" { + header.Set(":protocol", rp.Protocol) + } + + rw, req, err := sc.newWriterAndRequestNoBody(st, rp) + if err != nil { + return nil, nil, err + } + bodyOpen := !f.StreamEnded() + if bodyOpen { + if vv, ok := rp.Header["Content-Length"]; ok { + if cl, err := strconv.ParseUint(vv[0], 10, 63); err == nil { + req.ContentLength = int64(cl) + } else { + req.ContentLength = 0 + } + } else { + req.ContentLength = -1 + } + req.Body.(*http2requestBody).pipe = &http2pipe{ + b: &http2dataBuffer{expected: req.ContentLength}, + } + } + return rw, req, nil +} + +func (sc *http2serverConn) newWriterAndRequestNoBody(st *http2stream, rp httpcommon.ServerRequestParam) (*http2responseWriter, *Request, error) { + sc.serveG.check() + + var tlsState *tls.ConnectionState // nil if not scheme https + if rp.Scheme == "https" { + tlsState = sc.tlsState + } + + res := httpcommon.NewServerRequest(rp) + if res.InvalidReason != "" { + return nil, nil, sc.countError(res.InvalidReason, http2streamError(st.id, http2ErrCodeProtocol)) + } + + body := &http2requestBody{ + conn: sc, + stream: st, + needsContinue: res.NeedsContinue, + } + req := (&Request{ + Method: rp.Method, + URL: res.URL, + RemoteAddr: sc.remoteAddrStr, + Header: rp.Header, + RequestURI: res.RequestURI, + Proto: "HTTP/2.0", + ProtoMajor: 2, + ProtoMinor: 0, + TLS: tlsState, + Host: rp.Authority, + Body: body, + Trailer: res.Trailer, + }).WithContext(st.ctx) + rw := sc.newResponseWriter(st, req) + return rw, req, nil +} + +func (sc *http2serverConn) newResponseWriter(st *http2stream, req *Request) *http2responseWriter { + rws := http2responseWriterStatePool.Get().(*http2responseWriterState) + bwSave := rws.bw + *rws = http2responseWriterState{} // zero all the fields + rws.conn = sc + rws.bw = bwSave + rws.bw.Reset(http2chunkWriter{rws}) + rws.stream = st + rws.req = req + return &http2responseWriter{rws: rws} +} + +type http2unstartedHandler struct { + streamID uint32 + rw *http2responseWriter + req *Request + handler func(ResponseWriter, *Request) +} + +// scheduleHandler starts a handler goroutine, +// or schedules one to start as soon as an existing handler finishes. +func (sc *http2serverConn) scheduleHandler(streamID uint32, rw *http2responseWriter, req *Request, handler func(ResponseWriter, *Request)) error { + sc.serveG.check() + maxHandlers := sc.advMaxStreams + if sc.curHandlers < maxHandlers { + sc.curHandlers++ + go sc.runHandler(rw, req, handler) + return nil + } + if len(sc.unstartedHandlers) > int(4*sc.advMaxStreams) { + return sc.countError("too_many_early_resets", http2ConnectionError(http2ErrCodeEnhanceYourCalm)) + } + sc.unstartedHandlers = append(sc.unstartedHandlers, http2unstartedHandler{ + streamID: streamID, + rw: rw, + req: req, + handler: handler, + }) + return nil +} + +func (sc *http2serverConn) handlerDone() { + sc.serveG.check() + sc.curHandlers-- + i := 0 + maxHandlers := sc.advMaxStreams + for ; i < len(sc.unstartedHandlers); i++ { + u := sc.unstartedHandlers[i] + if sc.streams[u.streamID] == nil { + // This stream was reset before its goroutine had a chance to start. + continue + } + if sc.curHandlers >= maxHandlers { + break + } + sc.curHandlers++ + go sc.runHandler(u.rw, u.req, u.handler) + sc.unstartedHandlers[i] = http2unstartedHandler{} // don't retain references + } + sc.unstartedHandlers = sc.unstartedHandlers[i:] + if len(sc.unstartedHandlers) == 0 { + sc.unstartedHandlers = nil + } +} + +// Run on its own goroutine. +func (sc *http2serverConn) runHandler(rw *http2responseWriter, req *Request, handler func(ResponseWriter, *Request)) { + defer sc.sendServeMsg(http2handlerDoneMsg) + didPanic := true + defer func() { + rw.rws.stream.cancelCtx() + if req.MultipartForm != nil { + req.MultipartForm.RemoveAll() + } + if didPanic { + e := recover() + sc.writeFrameFromHandler(http2FrameWriteRequest{ + write: http2handlerPanicRST{rw.rws.stream.id}, + stream: rw.rws.stream, + }) + // Same as net/http: + if e != nil && e != ErrAbortHandler { + const size = 64 << 10 + buf := make([]byte, size) + buf = buf[:runtime.Stack(buf, false)] + sc.logf("http2: panic serving %v: %v\n%s", sc.conn.RemoteAddr(), e, buf) + } + return + } + rw.handlerDone() + }() + handler(rw, req) + didPanic = false +} + +func http2handleHeaderListTooLong(w ResponseWriter, r *Request) { + // 10.5.1 Limits on Header Block Size: + // .. "A server that receives a larger header block than it is + // willing to handle can send an HTTP 431 (Request Header Fields Too + // Large) status code" + const statusRequestHeaderFieldsTooLarge = 431 // only in Go 1.6+ + w.WriteHeader(statusRequestHeaderFieldsTooLarge) + io.WriteString(w, "

HTTP Error 431

Request Header Field(s) Too Large

") +} + +// called from handler goroutines. +// h may be nil. +func (sc *http2serverConn) writeHeaders(st *http2stream, headerData *http2writeResHeaders) error { + sc.serveG.checkNotOn() // NOT on + var errc chan error + if headerData.h != nil { + // If there's a header map (which we don't own), so we have to block on + // waiting for this frame to be written, so an http.Flush mid-handler + // writes out the correct value of keys, before a handler later potentially + // mutates it. + errc = sc.srv.state.getErrChan() + } + if err := sc.writeFrameFromHandler(http2FrameWriteRequest{ + write: headerData, + stream: st, + done: errc, + }); err != nil { + return err + } + if errc != nil { + select { + case err := <-errc: + sc.srv.state.putErrChan(errc) + return err + case <-sc.doneServing: + return http2errClientDisconnected + case <-st.cw: + return http2errStreamClosed + } + } + return nil +} + +// called from handler goroutines. +func (sc *http2serverConn) write100ContinueHeaders(st *http2stream) { + sc.writeFrameFromHandler(http2FrameWriteRequest{ + write: http2write100ContinueHeadersFrame{st.id}, + stream: st, + }) +} + +// A bodyReadMsg tells the server loop that the http.Handler read n +// bytes of the DATA from the client on the given stream. +type http2bodyReadMsg struct { + st *http2stream + n int +} + +// called from handler goroutines. +// Notes that the handler for the given stream ID read n bytes of its body +// and schedules flow control tokens to be sent. +func (sc *http2serverConn) noteBodyReadFromHandler(st *http2stream, n int, err error) { + sc.serveG.checkNotOn() // NOT on + if n > 0 { + select { + case sc.bodyReadCh <- http2bodyReadMsg{st, n}: + case <-sc.doneServing: + } + } +} + +func (sc *http2serverConn) noteBodyRead(st *http2stream, n int) { + sc.serveG.check() + sc.sendWindowUpdate(nil, n) // conn-level + if st.state != http2stateHalfClosedRemote && st.state != http2stateClosed { + // Don't send this WINDOW_UPDATE if the stream is closed + // remotely. + sc.sendWindowUpdate(st, n) + } +} + +// st may be nil for conn-level +func (sc *http2serverConn) sendWindowUpdate32(st *http2stream, n int32) { + sc.sendWindowUpdate(st, int(n)) +} + +// st may be nil for conn-level +func (sc *http2serverConn) sendWindowUpdate(st *http2stream, n int) { + sc.serveG.check() + var streamID uint32 + var send int32 + if st == nil { + send = sc.inflow.add(n) + } else { + streamID = st.id + send = st.inflow.add(n) + } + if send == 0 { + return + } + sc.writeFrame(http2FrameWriteRequest{ + write: http2writeWindowUpdate{streamID: streamID, n: uint32(send)}, + stream: st, + }) +} + +// requestBody is the Handler's Request.Body type. +// Read and Close may be called concurrently. +type http2requestBody struct { + _ http2incomparable + stream *http2stream + conn *http2serverConn + closeOnce sync.Once // for use by Close only + sawEOF bool // for use by Read only + pipe *http2pipe // non-nil if we have an HTTP entity message body + needsContinue bool // need to send a 100-continue +} + +func (b *http2requestBody) Close() error { + b.closeOnce.Do(func() { + if b.pipe != nil { + b.pipe.BreakWithError(http2errClosedBody) + } + }) + return nil +} + +func (b *http2requestBody) Read(p []byte) (n int, err error) { + if b.needsContinue { + b.needsContinue = false + b.conn.write100ContinueHeaders(b.stream) + } + if b.pipe == nil || b.sawEOF { + return 0, io.EOF + } + n, err = b.pipe.Read(p) + if err == io.EOF { + b.sawEOF = true + } + if b.conn == nil { + return + } + b.conn.noteBodyReadFromHandler(b.stream, n, err) + return +} + +// responseWriter is the http.ResponseWriter implementation. It's +// intentionally small (1 pointer wide) to minimize garbage. The +// responseWriterState pointer inside is zeroed at the end of a +// request (in handlerDone) and calls on the responseWriter thereafter +// simply crash (caller's mistake), but the much larger responseWriterState +// and buffers are reused between multiple requests. +type http2responseWriter struct { + rws *http2responseWriterState +} + +// Optional http.ResponseWriter interfaces implemented. +var ( + _ CloseNotifier = (*http2responseWriter)(nil) + _ Flusher = (*http2responseWriter)(nil) + _ http2stringWriter = (*http2responseWriter)(nil) +) + +type http2responseWriterState struct { + // immutable within a request: + stream *http2stream + req *Request + conn *http2serverConn + + // TODO: adjust buffer writing sizes based on server config, frame size updates from peer, etc + bw *bufio.Writer // writing to a chunkWriter{this *responseWriterState} + + // mutated by http.Handler goroutine: + handlerHeader Header // nil until called + snapHeader Header // snapshot of handlerHeader at WriteHeader time + trailers []string // set in writeChunk + status int // status code passed to WriteHeader + wroteHeader bool // WriteHeader called (explicitly or implicitly). Not necessarily sent to user yet. + sentHeader bool // have we sent the header frame? + handlerDone bool // handler has finished + + sentContentLen int64 // non-zero if handler set a Content-Length header + wroteBytes int64 + + closeNotifierMu sync.Mutex // guards closeNotifierCh + closeNotifierCh chan bool // nil until first used +} + +type http2chunkWriter struct{ rws *http2responseWriterState } + +func (cw http2chunkWriter) Write(p []byte) (n int, err error) { + n, err = cw.rws.writeChunk(p) + if err == http2errStreamClosed { + // If writing failed because the stream has been closed, + // return the reason it was closed. + err = cw.rws.stream.closeErr + } + return n, err +} + +func (rws *http2responseWriterState) hasTrailers() bool { return len(rws.trailers) > 0 } + +func (rws *http2responseWriterState) hasNonemptyTrailers() bool { + for _, trailer := range rws.trailers { + if _, ok := rws.handlerHeader[trailer]; ok { + return true + } + } + return false +} + +// declareTrailer is called for each Trailer header when the +// response header is written. It notes that a header will need to be +// written in the trailers at the end of the response. +func (rws *http2responseWriterState) declareTrailer(k string) { + k = CanonicalHeaderKey(k) + if !httpguts.ValidTrailerHeader(k) { + // Forbidden by RFC 7230, section 4.1.2. + rws.conn.logf("ignoring invalid trailer %q", k) + return + } + if !http2strSliceContains(rws.trailers, k) { + rws.trailers = append(rws.trailers, k) + } +} + +// writeChunk writes chunks from the bufio.Writer. But because +// bufio.Writer may bypass its chunking, sometimes p may be +// arbitrarily large. +// +// writeChunk is also responsible (on the first chunk) for sending the +// HEADER response. +func (rws *http2responseWriterState) writeChunk(p []byte) (n int, err error) { + if !rws.wroteHeader { + rws.writeHeader(200) + } + + if rws.handlerDone { + rws.promoteUndeclaredTrailers() + } + + isHeadResp := rws.req.Method == "HEAD" + if !rws.sentHeader { + rws.sentHeader = true + var ctype, clen string + if clen = rws.snapHeader.Get("Content-Length"); clen != "" { + rws.snapHeader.Del("Content-Length") + if cl, err := strconv.ParseUint(clen, 10, 63); err == nil { + rws.sentContentLen = int64(cl) + } else { + clen = "" + } + } + _, hasContentLength := rws.snapHeader["Content-Length"] + if !hasContentLength && clen == "" && rws.handlerDone && http2bodyAllowedForStatus(rws.status) && (len(p) > 0 || !isHeadResp) { + clen = strconv.Itoa(len(p)) + } + _, hasContentType := rws.snapHeader["Content-Type"] + // If the Content-Encoding is non-blank, we shouldn't + // sniff the body. See Issue golang.org/issue/31753. + ce := rws.snapHeader.Get("Content-Encoding") + hasCE := len(ce) > 0 + if !hasCE && !hasContentType && http2bodyAllowedForStatus(rws.status) && len(p) > 0 { + ctype = DetectContentType(p) + } + var date string + if _, ok := rws.snapHeader["Date"]; !ok { + // TODO(bradfitz): be faster here, like net/http? measure. + date = time.Now().UTC().Format(TimeFormat) + } + + for _, v := range rws.snapHeader["Trailer"] { + http2foreachHeaderElement(v, rws.declareTrailer) + } + + // "Connection" headers aren't allowed in HTTP/2 (RFC 7540, 8.1.2.2), + // but respect "Connection" == "close" to mean sending a GOAWAY and tearing + // down the TCP connection when idle, like we do for HTTP/1. + // TODO: remove more Connection-specific header fields here, in addition + // to "Connection". + if _, ok := rws.snapHeader["Connection"]; ok { + v := rws.snapHeader.Get("Connection") + delete(rws.snapHeader, "Connection") + if v == "close" { + rws.conn.startGracefulShutdown() + } + } + + endStream := (rws.handlerDone && !rws.hasTrailers() && len(p) == 0) || isHeadResp + err = rws.conn.writeHeaders(rws.stream, &http2writeResHeaders{ + streamID: rws.stream.id, + httpResCode: rws.status, + h: rws.snapHeader, + endStream: endStream, + contentType: ctype, + contentLength: clen, + date: date, + }) + if err != nil { + return 0, err + } + if endStream { + return 0, nil + } + } + if isHeadResp { + return len(p), nil + } + if len(p) == 0 && !rws.handlerDone { + return 0, nil + } + + // only send trailers if they have actually been defined by the + // server handler. + hasNonemptyTrailers := rws.hasNonemptyTrailers() + endStream := rws.handlerDone && !hasNonemptyTrailers + if len(p) > 0 || endStream { + // only send a 0 byte DATA frame if we're ending the stream. + if err := rws.conn.writeDataFromHandler(rws.stream, p, endStream); err != nil { + return 0, err + } + } + + if rws.handlerDone && hasNonemptyTrailers { + err = rws.conn.writeHeaders(rws.stream, &http2writeResHeaders{ + streamID: rws.stream.id, + h: rws.handlerHeader, + trailers: rws.trailers, + endStream: true, + }) + return len(p), err + } + return len(p), nil +} + +// TrailerPrefix is a magic prefix for ResponseWriter.Header map keys +// that, if present, signals that the map entry is actually for +// the response trailers, and not the response headers. The prefix +// is stripped after the ServeHTTP call finishes and the values are +// sent in the trailers. +// +// This mechanism is intended only for trailers that are not known +// prior to the headers being written. If the set of trailers is fixed +// or known before the header is written, the normal Go trailers mechanism +// is preferred: +// +// https://golang.org/pkg/net/http/#ResponseWriter +// https://golang.org/pkg/net/http/#example_ResponseWriter_trailers +const http2TrailerPrefix = "Trailer:" + +// promoteUndeclaredTrailers permits http.Handlers to set trailers +// after the header has already been flushed. Because the Go +// ResponseWriter interface has no way to set Trailers (only the +// Header), and because we didn't want to expand the ResponseWriter +// interface, and because nobody used trailers, and because RFC 7230 +// says you SHOULD (but not must) predeclare any trailers in the +// header, the official ResponseWriter rules said trailers in Go must +// be predeclared, and then we reuse the same ResponseWriter.Header() +// map to mean both Headers and Trailers. When it's time to write the +// Trailers, we pick out the fields of Headers that were declared as +// trailers. That worked for a while, until we found the first major +// user of Trailers in the wild: gRPC (using them only over http2), +// and gRPC libraries permit setting trailers mid-stream without +// predeclaring them. So: change of plans. We still permit the old +// way, but we also permit this hack: if a Header() key begins with +// "Trailer:", the suffix of that key is a Trailer. Because ':' is an +// invalid token byte anyway, there is no ambiguity. (And it's already +// filtered out) It's mildly hacky, but not terrible. +// +// This method runs after the Handler is done and promotes any Header +// fields to be trailers. +func (rws *http2responseWriterState) promoteUndeclaredTrailers() { + for k, vv := range rws.handlerHeader { + if !strings.HasPrefix(k, http2TrailerPrefix) { + continue + } + trailerKey := strings.TrimPrefix(k, http2TrailerPrefix) + rws.declareTrailer(trailerKey) + rws.handlerHeader[CanonicalHeaderKey(trailerKey)] = vv + } + + if len(rws.trailers) > 1 { + sorter := http2sorterPool.Get().(*http2sorter) + sorter.SortStrings(rws.trailers) + http2sorterPool.Put(sorter) + } +} + +func (w *http2responseWriter) SetReadDeadline(deadline time.Time) error { + st := w.rws.stream + if !deadline.IsZero() && deadline.Before(time.Now()) { + // If we're setting a deadline in the past, reset the stream immediately + // so writes after SetWriteDeadline returns will fail. + st.onReadTimeout() + return nil + } + w.rws.conn.sendServeMsg(func(sc *http2serverConn) { + if st.readDeadline != nil { + if !st.readDeadline.Stop() { + // Deadline already exceeded, or stream has been closed. + return + } + } + if deadline.IsZero() { + st.readDeadline = nil + } else if st.readDeadline == nil { + st.readDeadline = time.AfterFunc(deadline.Sub(time.Now()), st.onReadTimeout) + } else { + st.readDeadline.Reset(deadline.Sub(time.Now())) + } + }) + return nil +} + +func (w *http2responseWriter) SetWriteDeadline(deadline time.Time) error { + st := w.rws.stream + if !deadline.IsZero() && deadline.Before(time.Now()) { + // If we're setting a deadline in the past, reset the stream immediately + // so writes after SetWriteDeadline returns will fail. + st.onWriteTimeout() + return nil + } + w.rws.conn.sendServeMsg(func(sc *http2serverConn) { + if st.writeDeadline != nil { + if !st.writeDeadline.Stop() { + // Deadline already exceeded, or stream has been closed. + return + } + } + if deadline.IsZero() { + st.writeDeadline = nil + } else if st.writeDeadline == nil { + st.writeDeadline = time.AfterFunc(deadline.Sub(time.Now()), st.onWriteTimeout) + } else { + st.writeDeadline.Reset(deadline.Sub(time.Now())) + } + }) + return nil +} + +func (w *http2responseWriter) EnableFullDuplex() error { + // We always support full duplex responses, so this is a no-op. + return nil +} + +func (w *http2responseWriter) Flush() { + w.FlushError() +} + +func (w *http2responseWriter) FlushError() error { + rws := w.rws + if rws == nil { + panic("Header called after Handler finished") + } + var err error + if rws.bw.Buffered() > 0 { + err = rws.bw.Flush() + } else { + // The bufio.Writer won't call chunkWriter.Write + // (writeChunk with zero bytes), so we have to do it + // ourselves to force the HTTP response header and/or + // final DATA frame (with END_STREAM) to be sent. + _, err = http2chunkWriter{rws}.Write(nil) + if err == nil { + select { + case <-rws.stream.cw: + err = rws.stream.closeErr + default: + } + } + } + return err +} + +func (w *http2responseWriter) CloseNotify() <-chan bool { + rws := w.rws + if rws == nil { + panic("CloseNotify called after Handler finished") + } + rws.closeNotifierMu.Lock() + ch := rws.closeNotifierCh + if ch == nil { + ch = make(chan bool, 1) + rws.closeNotifierCh = ch + cw := rws.stream.cw + go func() { + cw.Wait() // wait for close + ch <- true + }() + } + rws.closeNotifierMu.Unlock() + return ch +} + +func (w *http2responseWriter) Header() Header { + rws := w.rws + if rws == nil { + panic("Header called after Handler finished") + } + if rws.handlerHeader == nil { + rws.handlerHeader = make(Header) + } + return rws.handlerHeader +} + +// checkWriteHeaderCode is a copy of net/http's checkWriteHeaderCode. +func http2checkWriteHeaderCode(code int) { + // Issue 22880: require valid WriteHeader status codes. + // For now we only enforce that it's three digits. + // In the future we might block things over 599 (600 and above aren't defined + // at http://httpwg.org/specs/rfc7231.html#status.codes). + // But for now any three digits. + // + // We used to send "HTTP/1.1 000 0" on the wire in responses but there's + // no equivalent bogus thing we can realistically send in HTTP/2, + // so we'll consistently panic instead and help people find their bugs + // early. (We can't return an error from WriteHeader even if we wanted to.) + if code < 100 || code > 999 { + panic(fmt.Sprintf("invalid WriteHeader code %v", code)) + } +} + +func (w *http2responseWriter) WriteHeader(code int) { + rws := w.rws + if rws == nil { + panic("WriteHeader called after Handler finished") + } + rws.writeHeader(code) +} + +func (rws *http2responseWriterState) writeHeader(code int) { + if rws.wroteHeader { + return + } + + http2checkWriteHeaderCode(code) + + // Handle informational headers + if code >= 100 && code <= 199 { + // Per RFC 8297 we must not clear the current header map + h := rws.handlerHeader + + _, cl := h["Content-Length"] + _, te := h["Transfer-Encoding"] + if cl || te { + h = h.Clone() + h.Del("Content-Length") + h.Del("Transfer-Encoding") + } + + rws.conn.writeHeaders(rws.stream, &http2writeResHeaders{ + streamID: rws.stream.id, + httpResCode: code, + h: h, + endStream: rws.handlerDone && !rws.hasTrailers(), + }) + + return + } + + rws.wroteHeader = true + rws.status = code + if len(rws.handlerHeader) > 0 { + rws.snapHeader = http2cloneHeader(rws.handlerHeader) + } +} + +func http2cloneHeader(h Header) Header { + h2 := make(Header, len(h)) + for k, vv := range h { + vv2 := make([]string, len(vv)) + copy(vv2, vv) + h2[k] = vv2 + } + return h2 +} + +// The Life Of A Write is like this: +// +// * Handler calls w.Write or w.WriteString -> +// * -> rws.bw (*bufio.Writer) -> +// * (Handler might call Flush) +// * -> chunkWriter{rws} +// * -> responseWriterState.writeChunk(p []byte) +// * -> responseWriterState.writeChunk (most of the magic; see comment there) +func (w *http2responseWriter) Write(p []byte) (n int, err error) { + return w.write(len(p), p, "") +} + +func (w *http2responseWriter) WriteString(s string) (n int, err error) { + return w.write(len(s), nil, s) +} + +// either dataB or dataS is non-zero. +func (w *http2responseWriter) write(lenData int, dataB []byte, dataS string) (n int, err error) { + rws := w.rws + if rws == nil { + panic("Write called after Handler finished") + } + if !rws.wroteHeader { + w.WriteHeader(200) + } + if !http2bodyAllowedForStatus(rws.status) { + return 0, ErrBodyNotAllowed + } + rws.wroteBytes += int64(len(dataB)) + int64(len(dataS)) // only one can be set + if rws.sentContentLen != 0 && rws.wroteBytes > rws.sentContentLen { + // TODO: send a RST_STREAM + return 0, errors.New("http2: handler wrote more than declared Content-Length") + } + + if dataB != nil { + return rws.bw.Write(dataB) + } else { + return rws.bw.WriteString(dataS) + } +} + +func (w *http2responseWriter) handlerDone() { + rws := w.rws + rws.handlerDone = true + w.Flush() + w.rws = nil + http2responseWriterStatePool.Put(rws) +} + +// Push errors. +var ( + http2ErrRecursivePush = errors.New("http2: recursive push not allowed") + http2ErrPushLimitReached = errors.New("http2: push would exceed peer's SETTINGS_MAX_CONCURRENT_STREAMS") +) + +var _ Pusher = (*http2responseWriter)(nil) + +func (w *http2responseWriter) Push(target string, opts *PushOptions) error { + st := w.rws.stream + sc := st.sc + sc.serveG.checkNotOn() + + // No recursive pushes: "PUSH_PROMISE frames MUST only be sent on a peer-initiated stream." + // http://tools.ietf.org/html/rfc7540#section-6.6 + if st.isPushed() { + return http2ErrRecursivePush + } + + if opts == nil { + opts = new(PushOptions) + } + + // Default options. + if opts.Method == "" { + opts.Method = "GET" + } + if opts.Header == nil { + opts.Header = Header{} + } + wantScheme := "http" + if w.rws.req.TLS != nil { + wantScheme = "https" + } + + // Validate the request. + u, err := url.Parse(target) + if err != nil { + return err + } + if u.Scheme == "" { + if !strings.HasPrefix(target, "/") { + return fmt.Errorf("target must be an absolute URL or an absolute path: %q", target) + } + u.Scheme = wantScheme + u.Host = w.rws.req.Host + } else { + if u.Scheme != wantScheme { + return fmt.Errorf("cannot push URL with scheme %q from request with scheme %q", u.Scheme, wantScheme) + } + if u.Host == "" { + return errors.New("URL must have a host") + } + } + for k := range opts.Header { + if strings.HasPrefix(k, ":") { + return fmt.Errorf("promised request headers cannot include pseudo header %q", k) + } + // These headers are meaningful only if the request has a body, + // but PUSH_PROMISE requests cannot have a body. + // http://tools.ietf.org/html/rfc7540#section-8.2 + // Also disallow Host, since the promised URL must be absolute. + if http2asciiEqualFold(k, "content-length") || + http2asciiEqualFold(k, "content-encoding") || + http2asciiEqualFold(k, "trailer") || + http2asciiEqualFold(k, "te") || + http2asciiEqualFold(k, "expect") || + http2asciiEqualFold(k, "host") { + return fmt.Errorf("promised request headers cannot include %q", k) + } + } + if err := http2checkValidHTTP2RequestHeaders(opts.Header); err != nil { + return err + } + + // The RFC effectively limits promised requests to GET and HEAD: + // "Promised requests MUST be cacheable [GET, HEAD, or POST], and MUST be safe [GET or HEAD]" + // http://tools.ietf.org/html/rfc7540#section-8.2 + if opts.Method != "GET" && opts.Method != "HEAD" { + return fmt.Errorf("method %q must be GET or HEAD", opts.Method) + } + + msg := &http2startPushRequest{ + parent: st, + method: opts.Method, + url: u, + header: http2cloneHeader(opts.Header), + done: sc.srv.state.getErrChan(), + } + + select { + case <-sc.doneServing: + return http2errClientDisconnected + case <-st.cw: + return http2errStreamClosed + case sc.serveMsgCh <- msg: + } + + select { + case <-sc.doneServing: + return http2errClientDisconnected + case <-st.cw: + return http2errStreamClosed + case err := <-msg.done: + sc.srv.state.putErrChan(msg.done) + return err + } +} + +type http2startPushRequest struct { + parent *http2stream + method string + url *url.URL + header Header + done chan error +} + +func (sc *http2serverConn) startPush(msg *http2startPushRequest) { + sc.serveG.check() + + // http://tools.ietf.org/html/rfc7540#section-6.6. + // PUSH_PROMISE frames MUST only be sent on a peer-initiated stream that + // is in either the "open" or "half-closed (remote)" state. + if msg.parent.state != http2stateOpen && msg.parent.state != http2stateHalfClosedRemote { + // responseWriter.Push checks that the stream is peer-initiated. + msg.done <- http2errStreamClosed + return + } + + // http://tools.ietf.org/html/rfc7540#section-6.6. + if !sc.pushEnabled { + msg.done <- ErrNotSupported + return + } + + // PUSH_PROMISE frames must be sent in increasing order by stream ID, so + // we allocate an ID for the promised stream lazily, when the PUSH_PROMISE + // is written. Once the ID is allocated, we start the request handler. + allocatePromisedID := func() (uint32, error) { + sc.serveG.check() + + // Check this again, just in case. Technically, we might have received + // an updated SETTINGS by the time we got around to writing this frame. + if !sc.pushEnabled { + return 0, ErrNotSupported + } + // http://tools.ietf.org/html/rfc7540#section-6.5.2. + if sc.curPushedStreams+1 > sc.clientMaxStreams { + return 0, http2ErrPushLimitReached + } + + // http://tools.ietf.org/html/rfc7540#section-5.1.1. + // Streams initiated by the server MUST use even-numbered identifiers. + // A server that is unable to establish a new stream identifier can send a GOAWAY + // frame so that the client is forced to open a new connection for new streams. + if sc.maxPushPromiseID+2 >= 1<<31 { + sc.startGracefulShutdownInternal() + return 0, http2ErrPushLimitReached + } + sc.maxPushPromiseID += 2 + promisedID := sc.maxPushPromiseID + + // http://tools.ietf.org/html/rfc7540#section-8.2. + // Strictly speaking, the new stream should start in "reserved (local)", then + // transition to "half closed (remote)" after sending the initial HEADERS, but + // we start in "half closed (remote)" for simplicity. + // See further comments at the definition of stateHalfClosedRemote. + promised := sc.newStream(promisedID, msg.parent.id, http2stateHalfClosedRemote) + rw, req, err := sc.newWriterAndRequestNoBody(promised, httpcommon.ServerRequestParam{ + Method: msg.method, + Scheme: msg.url.Scheme, + Authority: msg.url.Host, + Path: msg.url.RequestURI(), + Header: http2cloneHeader(msg.header), // clone since handler runs concurrently with writing the PUSH_PROMISE + }) + if err != nil { + // Should not happen, since we've already validated msg.url. + panic(fmt.Sprintf("newWriterAndRequestNoBody(%+v): %v", msg.url, err)) + } + + sc.curHandlers++ + go sc.runHandler(rw, req, sc.handler.ServeHTTP) + return promisedID, nil + } + + sc.writeFrame(http2FrameWriteRequest{ + write: &http2writePushPromise{ + streamID: msg.parent.id, + method: msg.method, + url: msg.url, + h: msg.header, + allocatePromisedID: allocatePromisedID, + }, + stream: msg.parent, + done: msg.done, + }) +} + +// foreachHeaderElement splits v according to the "#rule" construction +// in RFC 7230 section 7 and calls fn for each non-empty element. +func http2foreachHeaderElement(v string, fn func(string)) { + v = textproto.TrimString(v) + if v == "" { + return + } + if !strings.Contains(v, ",") { + fn(v) + return + } + for _, f := range strings.Split(v, ",") { + if f = textproto.TrimString(f); f != "" { + fn(f) + } + } +} + +// From http://httpwg.org/specs/rfc7540.html#rfc.section.8.1.2.2 +var http2connHeaders = []string{ + "Connection", + "Keep-Alive", + "Proxy-Connection", + "Transfer-Encoding", + "Upgrade", +} + +// checkValidHTTP2RequestHeaders checks whether h is a valid HTTP/2 request, +// per RFC 7540 Section 8.1.2.2. +// The returned error is reported to users. +func http2checkValidHTTP2RequestHeaders(h Header) error { + for _, k := range http2connHeaders { + if _, ok := h[k]; ok { + return fmt.Errorf("request header %q is not valid in HTTP/2", k) + } + } + te := h["Te"] + if len(te) > 0 && (len(te) > 1 || (te[0] != "trailers" && te[0] != "")) { + return errors.New(`request header "TE" may only be "trailers" in HTTP/2`) + } + return nil +} + +func http2new400Handler(err error) HandlerFunc { + return func(w ResponseWriter, r *Request) { + Error(w, err.Error(), StatusBadRequest) + } +} + +// h1ServerKeepAlivesDisabled reports whether hs has its keep-alives +// disabled. See comments on h1ServerShutdownChan above for why +// the code is written this way. +func http2h1ServerKeepAlivesDisabled(hs *Server) bool { + var x interface{} = hs + type I interface { + doKeepAlives() bool + } + if hs, ok := x.(I); ok { + return !hs.doKeepAlives() + } + return false +} + +func (sc *http2serverConn) countError(name string, err error) error { + if sc == nil || sc.srv == nil { + return err + } + f := sc.countErrorFunc + if f == nil { + return err + } + var typ string + var code http2ErrCode + switch e := err.(type) { + case http2ConnectionError: + typ = "conn" + code = http2ErrCode(e) + case http2StreamError: + typ = "stream" + code = http2ErrCode(e.Code) + default: + return err + } + codeStr := http2errCodeName[code] + if codeStr == "" { + codeStr = strconv.Itoa(int(code)) + } + f(fmt.Sprintf("%s_%s_%s", typ, codeStr, name)) + return err +} + +const ( + // transportDefaultConnFlow is how many connection-level flow control + // tokens we give the server at start-up, past the default 64k. + http2transportDefaultConnFlow = 1 << 30 + + // transportDefaultStreamFlow is how many stream-level flow + // control tokens we announce to the peer, and how many bytes + // we buffer per stream. + http2transportDefaultStreamFlow = 4 << 20 + + http2defaultUserAgent = "Go-http-client/2.0" + + // initialMaxConcurrentStreams is a connections maxConcurrentStreams until + // it's received servers initial SETTINGS frame, which corresponds with the + // spec's minimum recommended value. + http2initialMaxConcurrentStreams = 100 + + // defaultMaxConcurrentStreams is a connections default maxConcurrentStreams + // if the server doesn't include one in its initial SETTINGS frame. + http2defaultMaxConcurrentStreams = 1000 +) + +// Transport is an HTTP/2 Transport. +// +// A Transport internally caches connections to servers. It is safe +// for concurrent use by multiple goroutines. +type http2Transport struct { + // DialTLSContext specifies an optional dial function with context for + // creating TLS connections for requests. + // + // If DialTLSContext and DialTLS is nil, tls.Dial is used. + // + // If the returned net.Conn has a ConnectionState method like tls.Conn, + // it will be used to set http.Response.TLS. + DialTLSContext func(ctx context.Context, network, addr string, cfg *tls.Config) (net.Conn, error) + + // DialTLS specifies an optional dial function for creating + // TLS connections for requests. + // + // If DialTLSContext and DialTLS is nil, tls.Dial is used. + // + // Deprecated: Use DialTLSContext instead, which allows the transport + // to cancel dials as soon as they are no longer needed. + // If both are set, DialTLSContext takes priority. + DialTLS func(network, addr string, cfg *tls.Config) (net.Conn, error) + + // TLSClientConfig specifies the TLS configuration to use with + // tls.Client. If nil, the default configuration is used. + TLSClientConfig *tls.Config + + // ConnPool optionally specifies an alternate connection pool to use. + // If nil, the default is used. + ConnPool http2ClientConnPool + + // DisableCompression, if true, prevents the Transport from + // requesting compression with an "Accept-Encoding: gzip" + // request header when the Request contains no existing + // Accept-Encoding value. If the Transport requests gzip on + // its own and gets a gzipped response, it's transparently + // decoded in the Response.Body. However, if the user + // explicitly requested gzip it is not automatically + // uncompressed. + DisableCompression bool + + // AllowHTTP, if true, permits HTTP/2 requests using the insecure, + // plain-text "http" scheme. Note that this does not enable h2c support. + AllowHTTP bool + + // MaxHeaderListSize is the http2 SETTINGS_MAX_HEADER_LIST_SIZE to + // send in the initial settings frame. It is how many bytes + // of response headers are allowed. Unlike the http2 spec, zero here + // means to use a default limit (currently 10MB). If you actually + // want to advertise an unlimited value to the peer, Transport + // interprets the highest possible value here (0xffffffff or 1<<32-1) + // to mean no limit. + MaxHeaderListSize uint32 + + // MaxReadFrameSize is the http2 SETTINGS_MAX_FRAME_SIZE to send in the + // initial settings frame. It is the size in bytes of the largest frame + // payload that the sender is willing to receive. If 0, no setting is + // sent, and the value is provided by the peer, which should be 16384 + // according to the spec: + // https://datatracker.ietf.org/doc/html/rfc7540#section-6.5.2. + // Values are bounded in the range 16k to 16M. + MaxReadFrameSize uint32 + + // MaxDecoderHeaderTableSize optionally specifies the http2 + // SETTINGS_HEADER_TABLE_SIZE to send in the initial settings frame. It + // informs the remote endpoint of the maximum size of the header compression + // table used to decode header blocks, in octets. If zero, the default value + // of 4096 is used. + MaxDecoderHeaderTableSize uint32 + + // MaxEncoderHeaderTableSize optionally specifies an upper limit for the + // header compression table used for encoding request headers. Received + // SETTINGS_HEADER_TABLE_SIZE settings are capped at this limit. If zero, + // the default value of 4096 is used. + MaxEncoderHeaderTableSize uint32 + + // StrictMaxConcurrentStreams controls whether the server's + // SETTINGS_MAX_CONCURRENT_STREAMS should be respected + // globally. If false, new TCP connections are created to the + // server as needed to keep each under the per-connection + // SETTINGS_MAX_CONCURRENT_STREAMS limit. If true, the + // server's SETTINGS_MAX_CONCURRENT_STREAMS is interpreted as + // a global limit and callers of RoundTrip block when needed, + // waiting for their turn. + StrictMaxConcurrentStreams bool + + // IdleConnTimeout is the maximum amount of time an idle + // (keep-alive) connection will remain idle before closing + // itself. + // Zero means no limit. + IdleConnTimeout time.Duration + + // ReadIdleTimeout is the timeout after which a health check using ping + // frame will be carried out if no frame is received on the connection. + // Note that a ping response will is considered a received frame, so if + // there is no other traffic on the connection, the health check will + // be performed every ReadIdleTimeout interval. + // If zero, no health check is performed. + ReadIdleTimeout time.Duration + + // PingTimeout is the timeout after which the connection will be closed + // if a response to Ping is not received. + // Defaults to 15s. + PingTimeout time.Duration + + // WriteByteTimeout is the timeout after which the connection will be + // closed no data can be written to it. The timeout begins when data is + // available to write, and is extended whenever any bytes are written. + WriteByteTimeout time.Duration + + // CountError, if non-nil, is called on HTTP/2 transport errors. + // It's intended to increment a metric for monitoring, such + // as an expvar or Prometheus metric. + // The errType consists of only ASCII word characters. + CountError func(errType string) + + // t1, if non-nil, is the standard library Transport using + // this transport. Its settings are used (but not its + // RoundTrip method, etc). + t1 *Transport + + connPoolOnce sync.Once + connPoolOrDef http2ClientConnPool // non-nil version of ConnPool + + *http2transportTestHooks + + // Settings should not include InitialWindowSize or HeaderTableSize, set that in Transport + Settings []http2Setting + + ConnectionFlow uint32 + PriorityParam http2PriorityParam + PriorityFrames []http2PriorityFrame +} + +// Hook points used for testing. +// Outside of tests, t.transportTestHooks is nil and these all have minimal implementations. +// Inside tests, see the testSyncHooks function docs. + +type http2transportTestHooks struct { + newclientconn func(*http2ClientConn) +} + +func (t *http2Transport) maxHeaderListSize() uint32 { + n := int64(t.MaxHeaderListSize) + if t.t1 != nil && t.t1.MaxResponseHeaderBytes != 0 { + n = t.t1.MaxResponseHeaderBytes + if n > 0 { + n = http2adjustHTTP1MaxHeaderSize(n) + } + } + if n <= 0 { + return 10 << 20 + } + if n >= 0xffffffff { + return 0 + } + return uint32(n) +} + +func (t *http2Transport) disableCompression() bool { + return t.DisableCompression || (t.t1 != nil && t.t1.DisableCompression) +} + +// ConfigureTransport configures a net/http HTTP/1 Transport to use HTTP/2. +// It returns an error if t1 has already been HTTP/2-enabled. +// +// Use ConfigureTransports instead to configure the HTTP/2 Transport. +func http2ConfigureTransport(t1 *Transport) error { + _, err := http2ConfigureTransports(t1) + return err +} + +// ConfigureTransports configures a net/http HTTP/1 Transport to use HTTP/2. +// It returns a new HTTP/2 Transport for further configuration. +// It returns an error if t1 has already been HTTP/2-enabled. +func http2ConfigureTransports(t1 *Transport) (*http2Transport, error) { + return http2configureTransports(t1) +} + +func http2configureTransports(t1 *Transport) (*http2Transport, error) { + connPool := new(http2clientConnPool) + t2 := &http2Transport{ + ConnPool: http2noDialClientConnPool{connPool}, + t1: t1, + } + connPool.t = t2 + if err := http2registerHTTPSProtocol(t1, http2noDialH2RoundTripper{t2}); err != nil { + return nil, err + } + if t1.TLSClientConfig == nil { + t1.TLSClientConfig = new(tls.Config) + } + if !http2strSliceContains(t1.TLSClientConfig.NextProtos, "h2") { + t1.TLSClientConfig.NextProtos = append([]string{"h2"}, t1.TLSClientConfig.NextProtos...) + } + if !http2strSliceContains(t1.TLSClientConfig.NextProtos, "http/1.1") { + t1.TLSClientConfig.NextProtos = append(t1.TLSClientConfig.NextProtos, "http/1.1") + } + upgradeFn := func(scheme, authority string, c net.Conn) RoundTripper { + addr := http2authorityAddr(scheme, authority) + if used, err := connPool.addConnIfNeeded(addr, t2, c); err != nil { + go c.Close() + return http2erringRoundTripper{err} + } else if !used { + // Turns out we don't need this c. + // For example, two goroutines made requests to the same host + // at the same time, both kicking off TCP dials. (since protocol + // was unknown) + go c.Close() + } + if scheme == "http" { + return (*http2unencryptedTransport)(t2) + } + return t2 + } + if t1.TLSNextProto == nil { + t1.TLSNextProto = make(map[string]func(string, *tls.Conn) RoundTripper) + } + t1.TLSNextProto[http2NextProtoTLS] = func(authority string, c *tls.Conn) RoundTripper { + return upgradeFn("https", authority, c) + } + // The "unencrypted_http2" TLSNextProto key is used to pass off non-TLS HTTP/2 conns. + t1.TLSNextProto[http2nextProtoUnencryptedHTTP2] = func(authority string, c *tls.Conn) RoundTripper { + nc, err := http2unencryptedNetConnFromTLSConn(c) + if err != nil { + go c.Close() + return http2erringRoundTripper{err} + } + return upgradeFn("http", authority, nc) + } + return t2, nil +} + +// unencryptedTransport is a Transport with a RoundTrip method that +// always permits http:// URLs. +type http2unencryptedTransport http2Transport + +func (t *http2unencryptedTransport) RoundTrip(req *Request) (*Response, error) { + return (*http2Transport)(t).RoundTripOpt(req, http2RoundTripOpt{allowHTTP: true}) +} + +func (t *http2Transport) connPool() http2ClientConnPool { + t.connPoolOnce.Do(t.initConnPool) + return t.connPoolOrDef +} + +func (t *http2Transport) initConnPool() { + if t.ConnPool != nil { + t.connPoolOrDef = t.ConnPool + } else { + t.connPoolOrDef = &http2clientConnPool{t: t} + } +} + +// ClientConn is the state of a single HTTP/2 client connection to an +// HTTP/2 server. +type http2ClientConn struct { + t *http2Transport + tconn net.Conn // usually *tls.Conn, except specialized impls + tlsState *tls.ConnectionState // nil only for specialized impls + atomicReused uint32 // whether conn is being reused; atomic + singleUse bool // whether being used for a single http.Request + getConnCalled bool // used by clientConnPool + + // readLoop goroutine fields: + readerDone chan struct{} // closed on error + readerErr error // set before readerDone is closed + + idleTimeout time.Duration // or 0 for never + idleTimer *time.Timer + + mu sync.Mutex // guards following + cond *sync.Cond // hold mu; broadcast on flow/closed changes + flow http2outflow // our conn-level flow control quota (cs.outflow is per stream) + inflow http2inflow // peer's conn-level flow control + doNotReuse bool // whether conn is marked to not be reused for any future requests + closing bool + closed bool + closedOnIdle bool // true if conn was closed for idleness + seenSettings bool // true if we've seen a settings frame, false otherwise + seenSettingsChan chan struct{} // closed when seenSettings is true or frame reading fails + wantSettingsAck bool // we sent a SETTINGS frame and haven't heard back + goAway *http2GoAwayFrame // if non-nil, the GoAwayFrame we received + goAwayDebug string // goAway frame's debug data, retained as a string + streams map[uint32]*http2clientStream // client-initiated + streamsReserved int // incr by ReserveNewRequest; decr on RoundTrip + nextStreamID uint32 + pendingRequests int // requests blocked and waiting to be sent because len(streams) == maxConcurrentStreams + pings map[[8]byte]chan struct{} // in flight ping data to notification channel + br *bufio.Reader + lastActive time.Time + lastIdle time.Time // time last idle + // Settings from peer: (also guarded by wmu) + maxFrameSize uint32 + maxConcurrentStreams uint32 + peerMaxHeaderListSize uint64 + peerMaxHeaderTableSize uint32 + initialWindowSize uint32 + initialStreamRecvWindowSize int32 + readIdleTimeout time.Duration + pingTimeout time.Duration + extendedConnectAllowed bool + strictMaxConcurrentStreams bool + + // rstStreamPingsBlocked works around an unfortunate gRPC behavior. + // gRPC strictly limits the number of PING frames that it will receive. + // The default is two pings per two hours, but the limit resets every time + // the gRPC endpoint sends a HEADERS or DATA frame. See golang/go#70575. + // + // rstStreamPingsBlocked is set after receiving a response to a PING frame + // bundled with an RST_STREAM (see pendingResets below), and cleared after + // receiving a HEADERS or DATA frame. + rstStreamPingsBlocked bool + + // pendingResets is the number of RST_STREAM frames we have sent to the peer, + // without confirming that the peer has received them. When we send a RST_STREAM, + // we bundle it with a PING frame, unless a PING is already in flight. We count + // the reset stream against the connection's concurrency limit until we get + // a PING response. This limits the number of requests we'll try to send to a + // completely unresponsive connection. + pendingResets int + + // reqHeaderMu is a 1-element semaphore channel controlling access to sending new requests. + // Write to reqHeaderMu to lock it, read from it to unlock. + // Lock reqmu BEFORE mu or wmu. + reqHeaderMu chan struct{} + + // wmu is held while writing. + // Acquire BEFORE mu when holding both, to avoid blocking mu on network writes. + // Only acquire both at the same time when changing peer settings. + wmu sync.Mutex + bw *bufio.Writer + fr *http2Framer + werr error // first write error that has occurred + hbuf bytes.Buffer // HPACK encoder writes into this + henc *hpack.Encoder +} + +// clientStream is the state for a single HTTP/2 stream. One of these +// is created for each Transport.RoundTrip call. +type http2clientStream struct { + cc *http2ClientConn + + // Fields of Request that we may access even after the response body is closed. + ctx context.Context + reqCancel <-chan struct{} + + trace *httptrace.ClientTrace // or nil + ID uint32 + bufPipe http2pipe // buffered pipe with the flow-controlled response payload + requestedGzip bool + isHead bool + + abortOnce sync.Once + abort chan struct{} // closed to signal stream should end immediately + abortErr error // set if abort is closed + + peerClosed chan struct{} // closed when the peer sends an END_STREAM flag + donec chan struct{} // closed after the stream is in the closed state + on100 chan struct{} // buffered; written to if a 100 is received + + respHeaderRecv chan struct{} // closed when headers are received + res *Response // set if respHeaderRecv is closed + + flow http2outflow // guarded by cc.mu + inflow http2inflow // guarded by cc.mu + bytesRemain int64 // -1 means unknown; owned by transportResponseBody.Read + readErr error // sticky read error; owned by transportResponseBody.Read + + reqBody io.ReadCloser + reqBodyContentLength int64 // -1 means unknown + reqBodyClosed chan struct{} // guarded by cc.mu; non-nil on Close, closed when done + + // owned by writeRequest: + sentEndStream bool // sent an END_STREAM flag to the peer + sentHeaders bool + + // owned by clientConnReadLoop: + firstByte bool // got the first response byte + pastHeaders bool // got first MetaHeadersFrame (actual headers) + pastTrailers bool // got optional second MetaHeadersFrame (trailers) + readClosed bool // peer sent an END_STREAM flag + readAborted bool // read loop reset the stream + totalHeaderSize int64 // total size of 1xx headers seen + + trailer Header // accumulated trailers + resTrailer *Header // client's Response.Trailer +} + +var http2got1xxFuncForTests func(int, textproto.MIMEHeader) error + +// get1xxTraceFunc returns the value of request's httptrace.ClientTrace.Got1xxResponse func, +// if any. It returns nil if not set or if the Go version is too old. +func (cs *http2clientStream) get1xxTraceFunc() func(int, textproto.MIMEHeader) error { + if fn := http2got1xxFuncForTests; fn != nil { + return fn + } + return http2traceGot1xxResponseFunc(cs.trace) +} + +func (cs *http2clientStream) abortStream(err error) { + cs.cc.mu.Lock() + defer cs.cc.mu.Unlock() + cs.abortStreamLocked(err) +} + +func (cs *http2clientStream) abortStreamLocked(err error) { + cs.abortOnce.Do(func() { + cs.abortErr = err + close(cs.abort) + }) + if cs.reqBody != nil { + cs.closeReqBodyLocked() + } + // TODO(dneil): Clean up tests where cs.cc.cond is nil. + if cs.cc.cond != nil { + // Wake up writeRequestBody if it is waiting on flow control. + cs.cc.cond.Broadcast() + } +} + +func (cs *http2clientStream) abortRequestBodyWrite() { + cc := cs.cc + cc.mu.Lock() + defer cc.mu.Unlock() + if cs.reqBody != nil && cs.reqBodyClosed == nil { + cs.closeReqBodyLocked() + cc.cond.Broadcast() + } +} + +func (cs *http2clientStream) closeReqBodyLocked() { + if cs.reqBodyClosed != nil { + return + } + cs.reqBodyClosed = make(chan struct{}) + reqBodyClosed := cs.reqBodyClosed + go func() { + cs.reqBody.Close() + close(reqBodyClosed) + }() +} + +type http2stickyErrWriter struct { + conn net.Conn + timeout time.Duration + err *error +} + +func (sew http2stickyErrWriter) Write(p []byte) (n int, err error) { + if *sew.err != nil { + return 0, *sew.err + } + n, err = http2writeWithByteTimeout(sew.conn, sew.timeout, p) + *sew.err = err + return n, err +} + +// noCachedConnError is the concrete type of ErrNoCachedConn, which +// needs to be detected by net/http regardless of whether it's its +// bundled version (in h2_bundle.go with a rewritten type name) or +// from a user's x/net/http2. As such, as it has a unique method name +// (IsHTTP2NoCachedConnError) that net/http sniffs for via func +// isNoCachedConnError. +type http2noCachedConnError struct{} + +func (http2noCachedConnError) IsHTTP2NoCachedConnError() {} + +func (http2noCachedConnError) Error() string { return "http2: no cached connection was available" } + +// isNoCachedConnError reports whether err is of type noCachedConnError +// or its equivalent renamed type in net/http2's h2_bundle.go. Both types +// may coexist in the same running program. +func http2isNoCachedConnError(err error) bool { + _, ok := err.(interface{ IsHTTP2NoCachedConnError() }) + return ok +} + +var http2ErrNoCachedConn error = http2noCachedConnError{} + +// RoundTripOpt are options for the Transport.RoundTripOpt method. +type http2RoundTripOpt struct { + // OnlyCachedConn controls whether RoundTripOpt may + // create a new TCP connection. If set true and + // no cached connection is available, RoundTripOpt + // will return ErrNoCachedConn. + OnlyCachedConn bool + + allowHTTP bool // allow http:// URLs +} + +func (t *http2Transport) RoundTrip(req *Request) (*Response, error) { + return t.RoundTripOpt(req, http2RoundTripOpt{}) +} + +// authorityAddr returns a given authority (a host/IP, or host:port / ip:port) +// and returns a host:port. The port 443 is added if needed. +func http2authorityAddr(scheme string, authority string) (addr string) { + host, port, err := net.SplitHostPort(authority) + if err != nil { // authority didn't have a port + host = authority + port = "" + } + if port == "" { // authority's port was empty + port = "443" + if scheme == "http" { + port = "80" + } + } + if a, err := idna.ToASCII(host); err == nil { + host = a + } + // IPv6 address literal, without a port: + if strings.HasPrefix(host, "[") && strings.HasSuffix(host, "]") { + return host + ":" + port + } + return net.JoinHostPort(host, port) +} + +// RoundTripOpt is like RoundTrip, but takes options. +func (t *http2Transport) RoundTripOpt(req *Request, opt http2RoundTripOpt) (*Response, error) { + switch req.URL.Scheme { + case "https": + // Always okay. + case "http": + if !t.AllowHTTP && !opt.allowHTTP { + return nil, errors.New("http2: unencrypted HTTP/2 not enabled") + } + default: + return nil, errors.New("http2: unsupported scheme") + } + + addr := http2authorityAddr(req.URL.Scheme, req.URL.Host) + for retry := 0; ; retry++ { + cc, err := t.connPool().GetClientConn(req, addr) + if err != nil { + t.vlogf("http2: Transport failed to get client conn for %s: %v", addr, err) + return nil, err + } + reused := !atomic.CompareAndSwapUint32(&cc.atomicReused, 0, 1) + http2traceGotConn(req, cc, reused) + res, err := cc.RoundTrip(req) + if err != nil && retry <= 6 { + roundTripErr := err + if req, err = http2shouldRetryRequest(req, err); err == nil { + // After the first retry, do exponential backoff with 10% jitter. + if retry == 0 { + t.vlogf("RoundTrip retrying after failure: %v", roundTripErr) + continue + } + backoff := float64(uint(1) << (uint(retry) - 1)) + backoff += backoff * (0.1 * mathrand.Float64()) + d := time.Second * time.Duration(backoff) + tm := time.NewTimer(d) + select { + case <-tm.C: + t.vlogf("RoundTrip retrying after failure: %v", roundTripErr) + continue + case <-req.Context().Done(): + tm.Stop() + err = req.Context().Err() + } + } + } + if err == http2errClientConnNotEstablished { + // This ClientConn was created recently, + // this is the first request to use it, + // and the connection is closed and not usable. + // + // In this state, cc.idleTimer will remove the conn from the pool + // when it fires. Stop the timer and remove it here so future requests + // won't try to use this connection. + // + // If the timer has already fired and we're racing it, the redundant + // call to MarkDead is harmless. + if cc.idleTimer != nil { + cc.idleTimer.Stop() + } + t.connPool().MarkDead(cc) + } + if err != nil { + t.vlogf("RoundTrip failure: %v", err) + return nil, err + } + return res, nil + } +} + +// CloseIdleConnections closes any connections which were previously +// connected from previous requests but are now sitting idle. +// It does not interrupt any connections currently in use. +func (t *http2Transport) CloseIdleConnections() { + if cp, ok := t.connPool().(http2clientConnPoolIdleCloser); ok { + cp.closeIdleConnections() + } +} + +var ( + http2errClientConnClosed = errors.New("http2: client conn is closed") + http2errClientConnUnusable = errors.New("http2: client conn not usable") + http2errClientConnNotEstablished = errors.New("http2: client conn could not be established") + http2errClientConnGotGoAway = errors.New("http2: Transport received Server's graceful shutdown GOAWAY") + http2errClientConnForceClosed = errors.New("http2: client connection force closed via ClientConn.Close") +) + +// shouldRetryRequest is called by RoundTrip when a request fails to get +// response headers. It is always called with a non-nil error. +// It returns either a request to retry (either the same request, or a +// modified clone), or an error if the request can't be replayed. +func http2shouldRetryRequest(req *Request, err error) (*Request, error) { + if !http2canRetryError(err) { + return nil, err + } + // If the Body is nil (or http.NoBody), it's safe to reuse + // this request and its Body. + if req.Body == nil || req.Body == NoBody { + return req, nil + } + + // If the request body can be reset back to its original + // state via the optional req.GetBody, do that. + if req.GetBody != nil { + body, err := req.GetBody() + if err != nil { + return nil, err + } + newReq := *req + newReq.Body = body + return &newReq, nil + } + + // The Request.Body can't reset back to the beginning, but we + // don't seem to have started to read from it yet, so reuse + // the request directly. + if err == http2errClientConnUnusable { + return req, nil + } + + return nil, fmt.Errorf("http2: Transport: cannot retry err [%v] after Request.Body was written; define Request.GetBody to avoid this error", err) +} + +func http2canRetryError(err error) bool { + if err == http2errClientConnUnusable || err == http2errClientConnGotGoAway { + return true + } + if se, ok := err.(http2StreamError); ok { + if se.Code == http2ErrCodeProtocol && se.Cause == http2errFromPeer { + // See golang/go#47635, golang/go#42777 + return true + } + return se.Code == http2ErrCodeRefusedStream + } + return false +} + +func (t *http2Transport) dialClientConn(ctx context.Context, addr string, singleUse bool) (*http2ClientConn, error) { + if t.http2transportTestHooks != nil { + return t.newClientConn(nil, singleUse) + } + host, _, err := net.SplitHostPort(addr) + if err != nil { + return nil, err + } + tconn, err := t.dialTLS(ctx, "tcp", addr, t.newTLSConfig(host)) + if err != nil { + return nil, err + } + return t.newClientConn(tconn, singleUse) +} + +func (t *http2Transport) newTLSConfig(host string) *tls.Config { + cfg := new(tls.Config) + if t.TLSClientConfig != nil { + *cfg = *t.TLSClientConfig.Clone() + } + if !http2strSliceContains(cfg.NextProtos, http2NextProtoTLS) { + cfg.NextProtos = append([]string{http2NextProtoTLS}, cfg.NextProtos...) + } + if cfg.ServerName == "" { + cfg.ServerName = host + } + return cfg +} + +func (t *http2Transport) dialTLS(ctx context.Context, network, addr string, tlsCfg *tls.Config) (net.Conn, error) { + if t.DialTLSContext != nil { + return t.DialTLSContext(ctx, network, addr, tlsCfg) + } else if t.DialTLS != nil { + return t.DialTLS(network, addr, tlsCfg) + } + + tlsCn, err := t.dialTLSWithContext(ctx, network, addr, tlsCfg) + if err != nil { + return nil, err + } + state := tlsCn.ConnectionState() + if p := state.NegotiatedProtocol; p != http2NextProtoTLS { + return nil, fmt.Errorf("http2: unexpected ALPN protocol %q; want %q", p, http2NextProtoTLS) + } + if !state.NegotiatedProtocolIsMutual { + return nil, errors.New("http2: could not negotiate protocol mutually") + } + return tlsCn, nil +} + +// disableKeepAlives reports whether connections should be closed as +// soon as possible after handling the first request. +func (t *http2Transport) disableKeepAlives() bool { + return t.t1 != nil && t.t1.DisableKeepAlives +} + +func (t *http2Transport) expectContinueTimeout() time.Duration { + if t.t1 == nil { + return 0 + } + return t.t1.ExpectContinueTimeout +} + +func (t *http2Transport) NewClientConn(c net.Conn) (*http2ClientConn, error) { + return t.newClientConn(c, t.disableKeepAlives()) +} + +func (t *http2Transport) newClientConn(c net.Conn, singleUse bool) (*http2ClientConn, error) { + conf := http2configFromTransport(t) + cc := &http2ClientConn{ + t: t, + tconn: c, + readerDone: make(chan struct{}), + nextStreamID: 1, + maxFrameSize: 16 << 10, // spec default + initialWindowSize: 65535, // spec default + initialStreamRecvWindowSize: conf.MaxUploadBufferPerStream, + maxConcurrentStreams: http2initialMaxConcurrentStreams, // "infinite", per spec. Use a smaller value until we have received server settings. + strictMaxConcurrentStreams: conf.StrictMaxConcurrentRequests, + peerMaxHeaderListSize: 0xffffffffffffffff, // "infinite", per spec. Use 2^64-1 instead. + streams: make(map[uint32]*http2clientStream), + singleUse: singleUse, + seenSettingsChan: make(chan struct{}), + wantSettingsAck: true, + readIdleTimeout: conf.SendPingTimeout, + pingTimeout: conf.PingTimeout, + pings: make(map[[8]byte]chan struct{}), + reqHeaderMu: make(chan struct{}, 1), + lastActive: time.Now(), + } + if t.http2transportTestHooks != nil { + t.http2transportTestHooks.newclientconn(cc) + c = cc.tconn + } + if http2VerboseLogs { + t.vlogf("http2: Transport creating client conn %p to %v", cc, c.RemoteAddr()) + } + + cc.cond = sync.NewCond(&cc.mu) + cc.flow.add(int32(http2initialWindowSize)) + + // TODO: adjust this writer size to account for frame size + + // MTU + crypto/tls record padding. + cc.bw = bufio.NewWriter(http2stickyErrWriter{ + conn: c, + timeout: conf.WriteByteTimeout, + err: &cc.werr, + }) + cc.br = bufio.NewReader(c) + cc.fr = http2NewFramer(cc.bw, cc.br) + cc.fr.SetMaxReadFrameSize(conf.MaxReadFrameSize) + if t.CountError != nil { + cc.fr.countError = t.CountError + } + maxHeaderTableSize := conf.MaxDecoderHeaderTableSize + + for _, setting := range t.Settings { + switch setting.ID { + case http2SettingMaxFrameSize: + cc.maxFrameSize = setting.Val + case http2SettingMaxHeaderListSize: + t.MaxHeaderListSize = setting.Val + case http2SettingHeaderTableSize: + maxHeaderTableSize = setting.Val + } + } + + cc.fr.ReadMetaHeaders = hpack.NewDecoder(maxHeaderTableSize, nil) + cc.fr.MaxHeaderListSize = t.maxHeaderListSize() + + cc.henc = hpack.NewEncoder(&cc.hbuf) + cc.henc.SetMaxDynamicTableSizeLimit(conf.MaxEncoderHeaderTableSize) + cc.peerMaxHeaderTableSize = http2initialHeaderTableSize + + if cs, ok := c.(http2connectionStater); ok { + state := cs.ConnectionState() + cc.tlsState = &state + } + + initialSettings := t.Settings + + if len(t.Settings) == 0 { + initialSettings = []http2Setting{ + {ID: http2SettingEnablePush, Val: 0}, + {ID: http2SettingInitialWindowSize, Val: uint32(cc.initialStreamRecvWindowSize)}, + } + + initialSettings = append(initialSettings, http2Setting{ID: http2SettingMaxFrameSize, Val: conf.MaxReadFrameSize}) + if max := t.maxHeaderListSize(); max != 0 { + initialSettings = append(initialSettings, http2Setting{ID: http2SettingMaxHeaderListSize, Val: max}) + } + if maxHeaderTableSize != http2initialHeaderTableSize { + initialSettings = append(initialSettings, http2Setting{ID: http2SettingHeaderTableSize, Val: maxHeaderTableSize}) + } + } + + cc.bw.Write(http2clientPreface) + cc.fr.WriteSettings(initialSettings...) + + for _, p := range t.PriorityFrames { + cc.fr.WritePriority(p.StreamID, p.http2PriorityParam) + cc.nextStreamID = p.StreamID + 2 + } + + if cc.t.ConnectionFlow != 0 { + conf.MaxUploadBufferPerConnection = int32(cc.t.ConnectionFlow) + } + + cc.fr.WriteWindowUpdate(0, uint32(conf.MaxUploadBufferPerConnection)) + cc.inflow.init(conf.MaxUploadBufferPerConnection + http2initialWindowSize) + cc.bw.Flush() + if cc.werr != nil { + cc.Close() + return nil, cc.werr + } + + // Start the idle timer after the connection is fully initialized. + if d := t.idleConnTimeout(); d != 0 { + cc.idleTimeout = d + cc.idleTimer = time.AfterFunc(d, cc.onIdleTimeout) + } + + go cc.readLoop() + return cc, nil +} + +func (cc *http2ClientConn) healthCheck() { + pingTimeout := cc.pingTimeout + // We don't need to periodically ping in the health check, because the readLoop of ClientConn will + // trigger the healthCheck again if there is no frame received. + ctx, cancel := context.WithTimeout(context.Background(), pingTimeout) + defer cancel() + cc.vlogf("http2: Transport sending health check") + err := cc.Ping(ctx) + if err != nil { + cc.vlogf("http2: Transport health check failure: %v", err) + cc.closeForLostPing() + } else { + cc.vlogf("http2: Transport health check success") + } +} + +// SetDoNotReuse marks cc as not reusable for future HTTP requests. +func (cc *http2ClientConn) SetDoNotReuse() { + cc.mu.Lock() + defer cc.mu.Unlock() + cc.doNotReuse = true +} + +func (cc *http2ClientConn) setGoAway(f *http2GoAwayFrame) { + cc.mu.Lock() + defer cc.mu.Unlock() + + old := cc.goAway + cc.goAway = f + + // Merge the previous and current GoAway error frames. + if cc.goAwayDebug == "" { + cc.goAwayDebug = string(f.DebugData()) + } + if old != nil && old.ErrCode != http2ErrCodeNo { + cc.goAway.ErrCode = old.ErrCode + } + last := f.LastStreamID + for streamID, cs := range cc.streams { + if streamID <= last { + // The server's GOAWAY indicates that it received this stream. + // It will either finish processing it, or close the connection + // without doing so. Either way, leave the stream alone for now. + continue + } + if streamID == 1 && cc.goAway.ErrCode != http2ErrCodeNo { + // Don't retry the first stream on a connection if we get a non-NO error. + // If the server is sending an error on a new connection, + // retrying the request on a new one probably isn't going to work. + cs.abortStreamLocked(fmt.Errorf("http2: Transport received GOAWAY from server ErrCode:%v", cc.goAway.ErrCode)) + } else { + // Aborting the stream with errClentConnGotGoAway indicates that + // the request should be retried on a new connection. + cs.abortStreamLocked(http2errClientConnGotGoAway) + } + } +} + +// CanTakeNewRequest reports whether the connection can take a new request, +// meaning it has not been closed or received or sent a GOAWAY. +// +// If the caller is going to immediately make a new request on this +// connection, use ReserveNewRequest instead. +func (cc *http2ClientConn) CanTakeNewRequest() bool { + cc.mu.Lock() + defer cc.mu.Unlock() + return cc.canTakeNewRequestLocked() +} + +// ReserveNewRequest is like CanTakeNewRequest but also reserves a +// concurrent stream in cc. The reservation is decremented on the +// next call to RoundTrip. +func (cc *http2ClientConn) ReserveNewRequest() bool { + cc.mu.Lock() + defer cc.mu.Unlock() + if st := cc.idleStateLocked(); !st.canTakeNewRequest { + return false + } + cc.streamsReserved++ + return true +} + +// ClientConnState describes the state of a ClientConn. +type http2ClientConnState struct { + // Closed is whether the connection is closed. + Closed bool + + // Closing is whether the connection is in the process of + // closing. It may be closing due to shutdown, being a + // single-use connection, being marked as DoNotReuse, or + // having received a GOAWAY frame. + Closing bool + + // StreamsActive is how many streams are active. + StreamsActive int + + // StreamsReserved is how many streams have been reserved via + // ClientConn.ReserveNewRequest. + StreamsReserved int + + // StreamsPending is how many requests have been sent in excess + // of the peer's advertised MaxConcurrentStreams setting and + // are waiting for other streams to complete. + StreamsPending int + + // MaxConcurrentStreams is how many concurrent streams the + // peer advertised as acceptable. Zero means no SETTINGS + // frame has been received yet. + MaxConcurrentStreams uint32 + + // LastIdle, if non-zero, is when the connection last + // transitioned to idle state. + LastIdle time.Time +} + +// State returns a snapshot of cc's state. +func (cc *http2ClientConn) State() http2ClientConnState { + cc.wmu.Lock() + maxConcurrent := cc.maxConcurrentStreams + if !cc.seenSettings { + maxConcurrent = 0 + } + cc.wmu.Unlock() + + cc.mu.Lock() + defer cc.mu.Unlock() + return http2ClientConnState{ + Closed: cc.closed, + Closing: cc.closing || cc.singleUse || cc.doNotReuse || cc.goAway != nil, + StreamsActive: len(cc.streams) + cc.pendingResets, + StreamsReserved: cc.streamsReserved, + StreamsPending: cc.pendingRequests, + LastIdle: cc.lastIdle, + MaxConcurrentStreams: maxConcurrent, + } +} + +// clientConnIdleState describes the suitability of a client +// connection to initiate a new RoundTrip request. +type http2clientConnIdleState struct { + canTakeNewRequest bool +} + +func (cc *http2ClientConn) idleState() http2clientConnIdleState { + cc.mu.Lock() + defer cc.mu.Unlock() + return cc.idleStateLocked() +} + +func (cc *http2ClientConn) idleStateLocked() (st http2clientConnIdleState) { + if cc.singleUse && cc.nextStreamID > 1 { + return + } + var maxConcurrentOkay bool + if cc.strictMaxConcurrentStreams { + // We'll tell the caller we can take a new request to + // prevent the caller from dialing a new TCP + // connection, but then we'll block later before + // writing it. + maxConcurrentOkay = true + } else { + // We can take a new request if the total of + // - active streams; + // - reservation slots for new streams; and + // - streams for which we have sent a RST_STREAM and a PING, + // but received no subsequent frame + // is less than the concurrency limit. + maxConcurrentOkay = cc.currentRequestCountLocked() < int(cc.maxConcurrentStreams) + } + + st.canTakeNewRequest = cc.goAway == nil && !cc.closed && !cc.closing && maxConcurrentOkay && + !cc.doNotReuse && + int64(cc.nextStreamID)+2*int64(cc.pendingRequests) < math.MaxInt32 && + !cc.tooIdleLocked() + + // If this connection has never been used for a request and is closed, + // then let it take a request (which will fail). + // If the conn was closed for idleness, we're racing the idle timer; + // don't try to use the conn. (Issue #70515.) + // + // This avoids a situation where an error early in a connection's lifetime + // goes unreported. + if cc.nextStreamID == 1 && cc.streamsReserved == 0 && cc.closed && !cc.closedOnIdle { + st.canTakeNewRequest = true + } + + return +} + +// currentRequestCountLocked reports the number of concurrency slots currently in use, +// including active streams, reserved slots, and reset streams waiting for acknowledgement. +func (cc *http2ClientConn) currentRequestCountLocked() int { + return len(cc.streams) + cc.streamsReserved + cc.pendingResets +} + +func (cc *http2ClientConn) canTakeNewRequestLocked() bool { + st := cc.idleStateLocked() + return st.canTakeNewRequest +} + +// tooIdleLocked reports whether this connection has been been sitting idle +// for too much wall time. +func (cc *http2ClientConn) tooIdleLocked() bool { + // The Round(0) strips the monontonic clock reading so the + // times are compared based on their wall time. We don't want + // to reuse a connection that's been sitting idle during + // VM/laptop suspend if monotonic time was also frozen. + return cc.idleTimeout != 0 && !cc.lastIdle.IsZero() && time.Since(cc.lastIdle.Round(0)) > cc.idleTimeout +} + +// onIdleTimeout is called from a time.AfterFunc goroutine. It will +// only be called when we're idle, but because we're coming from a new +// goroutine, there could be a new request coming in at the same time, +// so this simply calls the synchronized closeIfIdle to shut down this +// connection. The timer could just call closeIfIdle, but this is more +// clear. +func (cc *http2ClientConn) onIdleTimeout() { + cc.closeIfIdle() +} + +func (cc *http2ClientConn) closeConn() { + t := time.AfterFunc(250*time.Millisecond, cc.forceCloseConn) + defer t.Stop() + cc.tconn.Close() +} + +// A tls.Conn.Close can hang for a long time if the peer is unresponsive. +// Try to shut it down more aggressively. +func (cc *http2ClientConn) forceCloseConn() { + tc, ok := cc.tconn.(*tls.Conn) + if !ok { + return + } + if nc := tc.NetConn(); nc != nil { + nc.Close() + } +} + +func (cc *http2ClientConn) closeIfIdle() { + cc.mu.Lock() + if len(cc.streams) > 0 || cc.streamsReserved > 0 { + cc.mu.Unlock() + return + } + cc.closed = true + cc.closedOnIdle = true + nextID := cc.nextStreamID + // TODO: do clients send GOAWAY too? maybe? Just Close: + cc.mu.Unlock() + + if http2VerboseLogs { + cc.vlogf("http2: Transport closing idle conn %p (forSingleUse=%v, maxStream=%v)", cc, cc.singleUse, nextID-2) + } + cc.closeConn() +} + +func (cc *http2ClientConn) isDoNotReuseAndIdle() bool { + cc.mu.Lock() + defer cc.mu.Unlock() + return cc.doNotReuse && len(cc.streams) == 0 +} + +var http2shutdownEnterWaitStateHook = func() {} + +// Shutdown gracefully closes the client connection, waiting for running streams to complete. +func (cc *http2ClientConn) Shutdown(ctx context.Context) error { + if err := cc.sendGoAway(); err != nil { + return err + } + // Wait for all in-flight streams to complete or connection to close + done := make(chan struct{}) + cancelled := false // guarded by cc.mu + go func() { + cc.mu.Lock() + defer cc.mu.Unlock() + for { + if len(cc.streams) == 0 || cc.closed { + cc.closed = true + close(done) + break + } + if cancelled { + break + } + cc.cond.Wait() + } + }() + http2shutdownEnterWaitStateHook() + select { + case <-done: + cc.closeConn() + return nil + case <-ctx.Done(): + cc.mu.Lock() + // Free the goroutine above + cancelled = true + cc.cond.Broadcast() + cc.mu.Unlock() + return ctx.Err() + } +} + +func (cc *http2ClientConn) sendGoAway() error { + cc.mu.Lock() + closing := cc.closing + cc.closing = true + maxStreamID := cc.nextStreamID + cc.mu.Unlock() + if closing { + // GOAWAY sent already + return nil + } + + cc.wmu.Lock() + defer cc.wmu.Unlock() + // Send a graceful shutdown frame to server + if err := cc.fr.WriteGoAway(maxStreamID, http2ErrCodeNo, nil); err != nil { + return err + } + if err := cc.bw.Flush(); err != nil { + return err + } + // Prevent new requests + return nil +} + +// closes the client connection immediately. In-flight requests are interrupted. +// err is sent to streams. +func (cc *http2ClientConn) closeForError(err error) { + cc.mu.Lock() + cc.closed = true + for _, cs := range cc.streams { + cs.abortStreamLocked(err) + } + cc.cond.Broadcast() + cc.mu.Unlock() + cc.closeConn() +} + +// Close closes the client connection immediately. +// +// In-flight requests are interrupted. For a graceful shutdown, use Shutdown instead. +func (cc *http2ClientConn) Close() error { + cc.closeForError(http2errClientConnForceClosed) + return nil +} + +// closes the client connection immediately. In-flight requests are interrupted. +func (cc *http2ClientConn) closeForLostPing() { + err := errors.New("http2: client connection lost") + if f := cc.t.CountError; f != nil { + f("conn_close_lost_ping") + } + cc.closeForError(err) +} + +// errRequestCanceled is a copy of net/http's errRequestCanceled because it's not +// exported. At least they'll be DeepEqual for h1-vs-h2 comparisons tests. +var http2errRequestCanceled = errors.New("net/http: request canceled") + +func (cc *http2ClientConn) responseHeaderTimeout() time.Duration { + if cc.t.t1 != nil { + return cc.t.t1.ResponseHeaderTimeout + } + // No way to do this (yet?) with just an http2.Transport. Probably + // no need. Request.Cancel this is the new way. We only need to support + // this for compatibility with the old http.Transport fields when + // we're doing transparent http2. + return 0 +} + +// actualContentLength returns a sanitized version of +// req.ContentLength, where 0 actually means zero (not unknown) and -1 +// means unknown. +func http2actualContentLength(req *Request) int64 { + if req.Body == nil || req.Body == NoBody { + return 0 + } + if req.ContentLength != 0 { + return req.ContentLength + } + return -1 +} + +func (cc *http2ClientConn) decrStreamReservations() { + cc.mu.Lock() + defer cc.mu.Unlock() + cc.decrStreamReservationsLocked() +} + +func (cc *http2ClientConn) decrStreamReservationsLocked() { + if cc.streamsReserved > 0 { + cc.streamsReserved-- + } +} + +func (cc *http2ClientConn) RoundTrip(req *Request) (*Response, error) { + return cc.roundTrip(req, nil) +} + +func (cc *http2ClientConn) roundTrip(req *Request, streamf func(*http2clientStream)) (*Response, error) { + ctx := req.Context() + cs := &http2clientStream{ + cc: cc, + ctx: ctx, + reqCancel: req.Cancel, + isHead: req.Method == "HEAD", + reqBody: req.Body, + reqBodyContentLength: http2actualContentLength(req), + trace: httptrace.ContextClientTrace(ctx), + peerClosed: make(chan struct{}), + abort: make(chan struct{}), + respHeaderRecv: make(chan struct{}), + donec: make(chan struct{}), + } + + cs.requestedGzip = httpcommon.IsRequestGzip(req.Method, req.Header, cc.t.disableCompression()) + + go cs.doRequest(req, streamf) + + waitDone := func() error { + select { + case <-cs.donec: + return nil + case <-ctx.Done(): + return ctx.Err() + case <-cs.reqCancel: + return http2errRequestCanceled + } + } + + handleResponseHeaders := func() (*Response, error) { + res := cs.res + if res.StatusCode > 299 { + // On error or status code 3xx, 4xx, 5xx, etc abort any + // ongoing write, assuming that the server doesn't care + // about our request body. If the server replied with 1xx or + // 2xx, however, then assume the server DOES potentially + // want our body (e.g. full-duplex streaming: + // golang.org/issue/13444). If it turns out the server + // doesn't, they'll RST_STREAM us soon enough. This is a + // heuristic to avoid adding knobs to Transport. Hopefully + // we can keep it. + cs.abortRequestBodyWrite() + } + res.Request = req + res.TLS = cc.tlsState + if res.Body == http2noBody && http2actualContentLength(req) == 0 { + // If there isn't a request or response body still being + // written, then wait for the stream to be closed before + // RoundTrip returns. + if err := waitDone(); err != nil { + return nil, err + } + } + return res, nil + } + + cancelRequest := func(cs *http2clientStream, err error) error { + cs.cc.mu.Lock() + bodyClosed := cs.reqBodyClosed + cs.cc.mu.Unlock() + // Wait for the request body to be closed. + // + // If nothing closed the body before now, abortStreamLocked + // will have started a goroutine to close it. + // + // Closing the body before returning avoids a race condition + // with net/http checking its readTrackingBody to see if the + // body was read from or closed. See golang/go#60041. + // + // The body is closed in a separate goroutine without the + // connection mutex held, but dropping the mutex before waiting + // will keep us from holding it indefinitely if the body + // close is slow for some reason. + if bodyClosed != nil { + <-bodyClosed + } + return err + } + + for { + select { + case <-cs.respHeaderRecv: + return handleResponseHeaders() + case <-cs.abort: + select { + case <-cs.respHeaderRecv: + // If both cs.respHeaderRecv and cs.abort are signaling, + // pick respHeaderRecv. The server probably wrote the + // response and immediately reset the stream. + // golang.org/issue/49645 + return handleResponseHeaders() + default: + waitDone() + return nil, cs.abortErr + } + case <-ctx.Done(): + err := ctx.Err() + cs.abortStream(err) + return nil, cancelRequest(cs, err) + case <-cs.reqCancel: + cs.abortStream(http2errRequestCanceled) + return nil, cancelRequest(cs, http2errRequestCanceled) + } + } +} + +// doRequest runs for the duration of the request lifetime. +// +// It sends the request and performs post-request cleanup (closing Request.Body, etc.). +func (cs *http2clientStream) doRequest(req *Request, streamf func(*http2clientStream)) { + err := cs.writeRequest(req, streamf) + cs.cleanupWriteRequest(err) +} + +var http2errExtendedConnectNotSupported = errors.New("net/http: extended connect not supported by peer") + +// writeRequest sends a request. +// +// It returns nil after the request is written, the response read, +// and the request stream is half-closed by the peer. +// +// It returns non-nil if the request ends otherwise. +// If the returned error is StreamError, the error Code may be used in resetting the stream. +func (cs *http2clientStream) writeRequest(req *Request, streamf func(*http2clientStream)) (err error) { + cc := cs.cc + ctx := cs.ctx + + // wait for setting frames to be received, a server can change this value later, + // but we just wait for the first settings frame + var isExtendedConnect bool + if req.Method == "CONNECT" && req.Header.Get(":protocol") != "" { + isExtendedConnect = true + } + + // Acquire the new-request lock by writing to reqHeaderMu. + // This lock guards the critical section covering allocating a new stream ID + // (requires mu) and creating the stream (requires wmu). + if cc.reqHeaderMu == nil { + panic("RoundTrip on uninitialized ClientConn") // for tests + } + if isExtendedConnect { + select { + case <-cs.reqCancel: + return http2errRequestCanceled + case <-ctx.Done(): + return ctx.Err() + case <-cc.seenSettingsChan: + if !cc.extendedConnectAllowed { + return http2errExtendedConnectNotSupported + } + } + } + select { + case cc.reqHeaderMu <- struct{}{}: + case <-cs.reqCancel: + return http2errRequestCanceled + case <-ctx.Done(): + return ctx.Err() + } + + cc.mu.Lock() + if cc.idleTimer != nil { + cc.idleTimer.Stop() + } + cc.decrStreamReservationsLocked() + if err := cc.awaitOpenSlotForStreamLocked(cs); err != nil { + cc.mu.Unlock() + <-cc.reqHeaderMu + return err + } + cc.addStreamLocked(cs) // assigns stream ID + if http2isConnectionCloseRequest(req) { + cc.doNotReuse = true + } + cc.mu.Unlock() + + if streamf != nil { + streamf(cs) + } + + continueTimeout := cc.t.expectContinueTimeout() + if continueTimeout != 0 { + if !httpguts.HeaderValuesContainsToken(req.Header["Expect"], "100-continue") { + continueTimeout = 0 + } else { + cs.on100 = make(chan struct{}, 1) + } + } + + // Past this point (where we send request headers), it is possible for + // RoundTrip to return successfully. Since the RoundTrip contract permits + // the caller to "mutate or reuse" the Request after closing the Response's Body, + // we must take care when referencing the Request from here on. + err = cs.encodeAndWriteHeaders(req) + <-cc.reqHeaderMu + if err != nil { + return err + } + + hasBody := cs.reqBodyContentLength != 0 + if !hasBody { + cs.sentEndStream = true + } else { + if continueTimeout != 0 { + http2traceWait100Continue(cs.trace) + timer := time.NewTimer(continueTimeout) + select { + case <-timer.C: + err = nil + case <-cs.on100: + err = nil + case <-cs.abort: + err = cs.abortErr + case <-ctx.Done(): + err = ctx.Err() + case <-cs.reqCancel: + err = http2errRequestCanceled + } + timer.Stop() + if err != nil { + http2traceWroteRequest(cs.trace, err) + return err + } + } + + if err = cs.writeRequestBody(req); err != nil { + if err != http2errStopReqBodyWrite { + http2traceWroteRequest(cs.trace, err) + return err + } + } else { + cs.sentEndStream = true + } + } + + http2traceWroteRequest(cs.trace, err) + + var respHeaderTimer <-chan time.Time + var respHeaderRecv chan struct{} + if d := cc.responseHeaderTimeout(); d != 0 { + timer := time.NewTimer(d) + defer timer.Stop() + respHeaderTimer = timer.C + respHeaderRecv = cs.respHeaderRecv + } + // Wait until the peer half-closes its end of the stream, + // or until the request is aborted (via context, error, or otherwise), + // whichever comes first. + for { + select { + case <-cs.peerClosed: + return nil + case <-respHeaderTimer: + return http2errTimeout + case <-respHeaderRecv: + respHeaderRecv = nil + respHeaderTimer = nil // keep waiting for END_STREAM + case <-cs.abort: + return cs.abortErr + case <-ctx.Done(): + return ctx.Err() + case <-cs.reqCancel: + return http2errRequestCanceled + } + } +} + +func (cs *http2clientStream) encodeAndWriteHeaders(req *Request) error { + cc := cs.cc + ctx := cs.ctx + + cc.wmu.Lock() + defer cc.wmu.Unlock() + + // If the request was canceled while waiting for cc.mu, just quit. + select { + case <-cs.abort: + return cs.abortErr + case <-ctx.Done(): + return ctx.Err() + case <-cs.reqCancel: + return http2errRequestCanceled + default: + } + + // Encode headers. + // + // we send: HEADERS{1}, CONTINUATION{0,} + DATA{0,} (DATA is + // sent by writeRequestBody below, along with any Trailers, + // again in form HEADERS{1}, CONTINUATION{0,}) + cc.hbuf.Reset() + res, err := http2encodeRequestHeaders(req, cs.requestedGzip, cc.peerMaxHeaderListSize, func(name, value string) { + cc.writeHeader(name, value) + }) + if err != nil { + return fmt.Errorf("http2: %w", err) + } + hdrs := cc.hbuf.Bytes() + + // Write the request. + endStream := !res.HasBody && !res.HasTrailers + cs.sentHeaders = true + err = cc.writeHeaders(cs.ID, endStream, int(cc.maxFrameSize), hdrs) + http2traceWroteHeaders(cs.trace) + return err +} + +func http2encodeRequestHeaders(req *Request, addGzipHeader bool, peerMaxHeaderListSize uint64, headerf func(name, value string)) (httpcommon.EncodeHeadersResult, error) { + return httpcommon.EncodeHeaders(req.Context(), httpcommon.EncodeHeadersParam{ + Request: httpcommon.Request{ + Header: httpcommon.Header(req.Header), + Trailer: req.Trailer, + URL: req.URL, + Host: req.Host, + Method: req.Method, + ActualContentLength: http2actualContentLength(req), + }, + AddGzipHeader: addGzipHeader, + PeerMaxHeaderListSize: peerMaxHeaderListSize, + DefaultUserAgent: http2defaultUserAgent, + }, headerf) +} + +// cleanupWriteRequest performs post-request tasks. +// +// If err (the result of writeRequest) is non-nil and the stream is not closed, +// cleanupWriteRequest will send a reset to the peer. +func (cs *http2clientStream) cleanupWriteRequest(err error) { + cc := cs.cc + + if cs.ID == 0 { + // We were canceled before creating the stream, so return our reservation. + cc.decrStreamReservations() + } + + // TODO: write h12Compare test showing whether + // Request.Body is closed by the Transport, + // and in multiple cases: server replies <=299 and >299 + // while still writing request body + cc.mu.Lock() + mustCloseBody := false + if cs.reqBody != nil && cs.reqBodyClosed == nil { + mustCloseBody = true + cs.reqBodyClosed = make(chan struct{}) + } + bodyClosed := cs.reqBodyClosed + closeOnIdle := cc.singleUse || cc.doNotReuse || cc.t.disableKeepAlives() || cc.goAway != nil + cc.mu.Unlock() + if mustCloseBody { + cs.reqBody.Close() + close(bodyClosed) + } + if bodyClosed != nil { + <-bodyClosed + } + + if err != nil && cs.sentEndStream { + // If the connection is closed immediately after the response is read, + // we may be aborted before finishing up here. If the stream was closed + // cleanly on both sides, there is no error. + select { + case <-cs.peerClosed: + err = nil + default: + } + } + if err != nil { + cs.abortStream(err) // possibly redundant, but harmless + if cs.sentHeaders { + if se, ok := err.(http2StreamError); ok { + if se.Cause != http2errFromPeer { + cc.writeStreamReset(cs.ID, se.Code, false, err) + } + } else { + // We're cancelling an in-flight request. + // + // This could be due to the server becoming unresponsive. + // To avoid sending too many requests on a dead connection, + // we let the request continue to consume a concurrency slot + // until we can confirm the server is still responding. + // We do this by sending a PING frame along with the RST_STREAM + // (unless a ping is already in flight). + // + // For simplicity, we don't bother tracking the PING payload: + // We reset cc.pendingResets any time we receive a PING ACK. + // + // We skip this if the conn is going to be closed on idle, + // because it's short lived and will probably be closed before + // we get the ping response. + ping := false + if !closeOnIdle { + cc.mu.Lock() + // rstStreamPingsBlocked works around a gRPC behavior: + // see comment on the field for details. + if !cc.rstStreamPingsBlocked { + if cc.pendingResets == 0 { + ping = true + } + cc.pendingResets++ + } + cc.mu.Unlock() + } + cc.writeStreamReset(cs.ID, http2ErrCodeCancel, ping, err) + } + } + cs.bufPipe.CloseWithError(err) // no-op if already closed + } else { + if cs.sentHeaders && !cs.sentEndStream { + cc.writeStreamReset(cs.ID, http2ErrCodeNo, false, nil) + } + cs.bufPipe.CloseWithError(http2errRequestCanceled) + } + if cs.ID != 0 { + cc.forgetStreamID(cs.ID) + } + + cc.wmu.Lock() + werr := cc.werr + cc.wmu.Unlock() + if werr != nil { + cc.Close() + } + + close(cs.donec) +} + +// awaitOpenSlotForStreamLocked waits until len(streams) < maxConcurrentStreams. +// Must hold cc.mu. +func (cc *http2ClientConn) awaitOpenSlotForStreamLocked(cs *http2clientStream) error { + for { + if cc.closed && cc.nextStreamID == 1 && cc.streamsReserved == 0 { + // This is the very first request sent to this connection. + // Return a fatal error which aborts the retry loop. + return http2errClientConnNotEstablished + } + cc.lastActive = time.Now() + if cc.closed || !cc.canTakeNewRequestLocked() { + return http2errClientConnUnusable + } + cc.lastIdle = time.Time{} + if cc.currentRequestCountLocked() < int(cc.maxConcurrentStreams) { + return nil + } + cc.pendingRequests++ + cc.cond.Wait() + cc.pendingRequests-- + select { + case <-cs.abort: + return cs.abortErr + default: + } + } +} + +// requires cc.wmu be held +func (cc *http2ClientConn) writeHeaders(streamID uint32, endStream bool, maxFrameSize int, hdrs []byte) error { + first := true // first frame written (HEADERS is first, then CONTINUATION) + for len(hdrs) > 0 && cc.werr == nil { + chunk := hdrs + if len(chunk) > maxFrameSize { + chunk = chunk[:maxFrameSize] + } + hdrs = hdrs[len(chunk):] + endHeaders := len(hdrs) == 0 + if first { + cc.fr.WriteHeaders(http2HeadersFrameParam{ + StreamID: streamID, + BlockFragment: chunk, + EndStream: endStream, + EndHeaders: endHeaders, + Priority: cc.t.PriorityParam, + }) + first = false + } else { + cc.fr.WriteContinuation(streamID, endHeaders, chunk) + } + } + cc.bw.Flush() + return cc.werr +} + +// internal error values; they don't escape to callers +var ( + // abort request body write; don't send cancel + http2errStopReqBodyWrite = errors.New("http2: aborting request body write") + + // abort request body write, but send stream reset of cancel. + http2errStopReqBodyWriteAndCancel = errors.New("http2: canceling request") + + http2errReqBodyTooLong = errors.New("http2: request body larger than specified content length") +) + +// frameScratchBufferLen returns the length of a buffer to use for +// outgoing request bodies to read/write to/from. +// +// It returns max(1, min(peer's advertised max frame size, +// Request.ContentLength+1, 512KB)). +func (cs *http2clientStream) frameScratchBufferLen(maxFrameSize int) int { + const max = 512 << 10 + n := int64(maxFrameSize) + if n > max { + n = max + } + if cl := cs.reqBodyContentLength; cl != -1 && cl+1 < n { + // Add an extra byte past the declared content-length to + // give the caller's Request.Body io.Reader a chance to + // give us more bytes than they declared, so we can catch it + // early. + n = cl + 1 + } + if n < 1 { + return 1 + } + return int(n) // doesn't truncate; max is 512K +} + +// Seven bufPools manage different frame sizes. This helps to avoid scenarios where long-running +// streaming requests using small frame sizes occupy large buffers initially allocated for prior +// requests needing big buffers. The size ranges are as follows: +// {0 KB, 16 KB], {16 KB, 32 KB], {32 KB, 64 KB], {64 KB, 128 KB], {128 KB, 256 KB], +// {256 KB, 512 KB], {512 KB, infinity} +// In practice, the maximum scratch buffer size should not exceed 512 KB due to +// frameScratchBufferLen(maxFrameSize), thus the "infinity pool" should never be used. +// It exists mainly as a safety measure, for potential future increases in max buffer size. +var http2bufPools [7]sync.Pool // of *[]byte + +func http2bufPoolIndex(size int) int { + if size <= 16384 { + return 0 + } + size -= 1 + bits := bits.Len(uint(size)) + index := bits - 14 + if index >= len(http2bufPools) { + return len(http2bufPools) - 1 + } + return index +} + +func (cs *http2clientStream) writeRequestBody(req *Request) (err error) { + cc := cs.cc + body := cs.reqBody + sentEnd := false // whether we sent the final DATA frame w/ END_STREAM + + hasTrailers := req.Trailer != nil + remainLen := cs.reqBodyContentLength + hasContentLen := remainLen != -1 + + cc.mu.Lock() + maxFrameSize := int(cc.maxFrameSize) + cc.mu.Unlock() + + // Scratch buffer for reading into & writing from. + scratchLen := cs.frameScratchBufferLen(maxFrameSize) + var buf []byte + index := http2bufPoolIndex(scratchLen) + if bp, ok := http2bufPools[index].Get().(*[]byte); ok && len(*bp) >= scratchLen { + defer http2bufPools[index].Put(bp) + buf = *bp + } else { + buf = make([]byte, scratchLen) + defer http2bufPools[index].Put(&buf) + } + + var sawEOF bool + for !sawEOF { + n, err := body.Read(buf) + if hasContentLen { + remainLen -= int64(n) + if remainLen == 0 && err == nil { + // The request body's Content-Length was predeclared and + // we just finished reading it all, but the underlying io.Reader + // returned the final chunk with a nil error (which is one of + // the two valid things a Reader can do at EOF). Because we'd prefer + // to send the END_STREAM bit early, double-check that we're actually + // at EOF. Subsequent reads should return (0, EOF) at this point. + // If either value is different, we return an error in one of two ways below. + var scratch [1]byte + var n1 int + n1, err = body.Read(scratch[:]) + remainLen -= int64(n1) + } + if remainLen < 0 { + err = http2errReqBodyTooLong + return err + } + } + if err != nil { + cc.mu.Lock() + bodyClosed := cs.reqBodyClosed != nil + cc.mu.Unlock() + switch { + case bodyClosed: + return http2errStopReqBodyWrite + case err == io.EOF: + sawEOF = true + err = nil + default: + return err + } + } + + remain := buf[:n] + for len(remain) > 0 && err == nil { + var allowed int32 + allowed, err = cs.awaitFlowControl(len(remain)) + if err != nil { + return err + } + cc.wmu.Lock() + data := remain[:allowed] + remain = remain[allowed:] + sentEnd = sawEOF && len(remain) == 0 && !hasTrailers + err = cc.fr.WriteData(cs.ID, sentEnd, data) + if err == nil { + // TODO(bradfitz): this flush is for latency, not bandwidth. + // Most requests won't need this. Make this opt-in or + // opt-out? Use some heuristic on the body type? Nagel-like + // timers? Based on 'n'? Only last chunk of this for loop, + // unless flow control tokens are low? For now, always. + // If we change this, see comment below. + err = cc.bw.Flush() + } + cc.wmu.Unlock() + } + if err != nil { + return err + } + } + + if sentEnd { + // Already sent END_STREAM (which implies we have no + // trailers) and flushed, because currently all + // WriteData frames above get a flush. So we're done. + return nil + } + + // Since the RoundTrip contract permits the caller to "mutate or reuse" + // a request after the Response's Body is closed, verify that this hasn't + // happened before accessing the trailers. + cc.mu.Lock() + trailer := req.Trailer + err = cs.abortErr + cc.mu.Unlock() + if err != nil { + return err + } + + cc.wmu.Lock() + defer cc.wmu.Unlock() + var trls []byte + if len(trailer) > 0 { + trls, err = cc.encodeTrailers(trailer) + if err != nil { + return err + } + } + + // Two ways to send END_STREAM: either with trailers, or + // with an empty DATA frame. + if len(trls) > 0 { + err = cc.writeHeaders(cs.ID, true, maxFrameSize, trls) + } else { + err = cc.fr.WriteData(cs.ID, true, nil) + } + if ferr := cc.bw.Flush(); ferr != nil && err == nil { + err = ferr + } + return err +} + +// awaitFlowControl waits for [1, min(maxBytes, cc.cs.maxFrameSize)] flow +// control tokens from the server. +// It returns either the non-zero number of tokens taken or an error +// if the stream is dead. +func (cs *http2clientStream) awaitFlowControl(maxBytes int) (taken int32, err error) { + cc := cs.cc + ctx := cs.ctx + cc.mu.Lock() + defer cc.mu.Unlock() + for { + if cc.closed { + return 0, http2errClientConnClosed + } + if cs.reqBodyClosed != nil { + return 0, http2errStopReqBodyWrite + } + select { + case <-cs.abort: + return 0, cs.abortErr + case <-ctx.Done(): + return 0, ctx.Err() + case <-cs.reqCancel: + return 0, http2errRequestCanceled + default: + } + if a := cs.flow.available(); a > 0 { + take := a + if int(take) > maxBytes { + + take = int32(maxBytes) // can't truncate int; take is int32 + } + if take > int32(cc.maxFrameSize) { + take = int32(cc.maxFrameSize) + } + cs.flow.take(take) + return take, nil + } + cc.cond.Wait() + } +} + +// requires cc.wmu be held. +func (cc *http2ClientConn) encodeTrailers(trailer Header) ([]byte, error) { + cc.hbuf.Reset() + + hlSize := uint64(0) + for k, vv := range trailer { + for _, v := range vv { + hf := hpack.HeaderField{Name: k, Value: v} + hlSize += uint64(hf.Size()) + } + } + if hlSize > cc.peerMaxHeaderListSize { + return nil, http2errRequestHeaderListSize + } + + for k, vv := range trailer { + lowKey, ascii := httpcommon.LowerHeader(k) + if !ascii { + // Skip writing invalid headers. Per RFC 7540, Section 8.1.2, header + // field names have to be ASCII characters (just as in HTTP/1.x). + continue + } + // Transfer-Encoding, etc.. have already been filtered at the + // start of RoundTrip + for _, v := range vv { + cc.writeHeader(lowKey, v) + } + } + return cc.hbuf.Bytes(), nil +} + +func (cc *http2ClientConn) writeHeader(name, value string) { + if http2VerboseLogs { + log.Printf("http2: Transport encoding header %q = %q", name, value) + } + cc.henc.WriteField(hpack.HeaderField{Name: name, Value: value}) +} + +type http2resAndError struct { + _ http2incomparable + res *Response + err error +} + +// requires cc.mu be held. +func (cc *http2ClientConn) addStreamLocked(cs *http2clientStream) { + cs.flow.add(int32(cc.initialWindowSize)) + cs.flow.setConnFlow(&cc.flow) + cs.inflow.init(cc.initialStreamRecvWindowSize) + cs.ID = cc.nextStreamID + cc.nextStreamID += 2 + cc.streams[cs.ID] = cs + if cs.ID == 0 { + panic("assigned stream ID 0") + } +} + +func (cc *http2ClientConn) forgetStreamID(id uint32) { + cc.mu.Lock() + slen := len(cc.streams) + delete(cc.streams, id) + if len(cc.streams) != slen-1 { + panic("forgetting unknown stream id") + } + cc.lastActive = time.Now() + if len(cc.streams) == 0 && cc.idleTimer != nil { + cc.idleTimer.Reset(cc.idleTimeout) + cc.lastIdle = time.Now() + } + // Wake up writeRequestBody via clientStream.awaitFlowControl and + // wake up RoundTrip if there is a pending request. + cc.cond.Broadcast() + + closeOnIdle := cc.singleUse || cc.doNotReuse || cc.t.disableKeepAlives() || cc.goAway != nil + if closeOnIdle && cc.streamsReserved == 0 && len(cc.streams) == 0 { + if http2VerboseLogs { + cc.vlogf("http2: Transport closing idle conn %p (forSingleUse=%v, maxStream=%v)", cc, cc.singleUse, cc.nextStreamID-2) + } + cc.closed = true + defer cc.closeConn() + } + + cc.mu.Unlock() +} + +// clientConnReadLoop is the state owned by the clientConn's frame-reading readLoop. +type http2clientConnReadLoop struct { + _ http2incomparable + cc *http2ClientConn +} + +// readLoop runs in its own goroutine and reads and dispatches frames. +func (cc *http2ClientConn) readLoop() { + rl := &http2clientConnReadLoop{cc: cc} + defer rl.cleanup() + cc.readerErr = rl.run() + if ce, ok := cc.readerErr.(http2ConnectionError); ok { + cc.wmu.Lock() + cc.fr.WriteGoAway(0, http2ErrCode(ce), nil) + cc.wmu.Unlock() + } +} + +// GoAwayError is returned by the Transport when the server closes the +// TCP connection after sending a GOAWAY frame. +type http2GoAwayError struct { + LastStreamID uint32 + ErrCode http2ErrCode + DebugData string +} + +func (e http2GoAwayError) Error() string { + return fmt.Sprintf("http2: server sent GOAWAY and closed the connection; LastStreamID=%v, ErrCode=%v, debug=%q", + e.LastStreamID, e.ErrCode, e.DebugData) +} + +func http2isEOFOrNetReadError(err error) bool { + if err == io.EOF { + return true + } + ne, ok := err.(*net.OpError) + return ok && ne.Op == "read" +} + +func (rl *http2clientConnReadLoop) cleanup() { + cc := rl.cc + defer cc.closeConn() + defer close(cc.readerDone) + + if cc.idleTimer != nil { + cc.idleTimer.Stop() + } + + // Close any response bodies if the server closes prematurely. + // TODO: also do this if we've written the headers but not + // gotten a response yet. + err := cc.readerErr + cc.mu.Lock() + if cc.goAway != nil && http2isEOFOrNetReadError(err) { + err = http2GoAwayError{ + LastStreamID: cc.goAway.LastStreamID, + ErrCode: cc.goAway.ErrCode, + DebugData: cc.goAwayDebug, + } + } else if err == io.EOF { + err = io.ErrUnexpectedEOF + } + cc.closed = true + + // If the connection has never been used, and has been open for only a short time, + // leave it in the connection pool for a little while. + // + // This avoids a situation where new connections are constantly created, + // added to the pool, fail, and are removed from the pool, without any error + // being surfaced to the user. + unusedWaitTime := 5 * time.Second + if cc.idleTimeout > 0 && unusedWaitTime > cc.idleTimeout { + unusedWaitTime = cc.idleTimeout + } + idleTime := time.Now().Sub(cc.lastActive) + if atomic.LoadUint32(&cc.atomicReused) == 0 && idleTime < unusedWaitTime && !cc.closedOnIdle { + cc.idleTimer = time.AfterFunc(unusedWaitTime-idleTime, func() { + cc.t.connPool().MarkDead(cc) + }) + } else { + cc.mu.Unlock() // avoid any deadlocks in MarkDead + cc.t.connPool().MarkDead(cc) + cc.mu.Lock() + } + + for _, cs := range cc.streams { + select { + case <-cs.peerClosed: + // The server closed the stream before closing the conn, + // so no need to interrupt it. + default: + cs.abortStreamLocked(err) + } + } + cc.cond.Broadcast() + cc.mu.Unlock() + + if !cc.seenSettings { + // If we have a pending request that wants extended CONNECT, + // let it continue and fail with the connection error. + cc.extendedConnectAllowed = true + close(cc.seenSettingsChan) + } +} + +// countReadFrameError calls Transport.CountError with a string +// representing err. +func (cc *http2ClientConn) countReadFrameError(err error) { + f := cc.t.CountError + if f == nil || err == nil { + return + } + if ce, ok := err.(http2ConnectionError); ok { + errCode := http2ErrCode(ce) + f(fmt.Sprintf("read_frame_conn_error_%s", errCode.stringToken())) + return + } + if errors.Is(err, io.EOF) { + f("read_frame_eof") + return + } + if errors.Is(err, io.ErrUnexpectedEOF) { + f("read_frame_unexpected_eof") + return + } + if errors.Is(err, http2ErrFrameTooLarge) { + f("read_frame_too_large") + return + } + f("read_frame_other") +} + +func (rl *http2clientConnReadLoop) run() error { + cc := rl.cc + gotSettings := false + readIdleTimeout := cc.readIdleTimeout + var t *time.Timer + if readIdleTimeout != 0 { + t = time.AfterFunc(readIdleTimeout, cc.healthCheck) + } + for { + f, err := cc.fr.ReadFrame() + if t != nil { + t.Reset(readIdleTimeout) + } + if err != nil { + cc.vlogf("http2: Transport readFrame error on conn %p: (%T) %v", cc, err, err) + } + if se, ok := err.(http2StreamError); ok { + if cs := rl.streamByID(se.StreamID, http2notHeaderOrDataFrame); cs != nil { + if se.Cause == nil { + se.Cause = cc.fr.errDetail + } + rl.endStreamError(cs, se) + } + continue + } else if err != nil { + cc.countReadFrameError(err) + return err + } + if http2VerboseLogs { + cc.vlogf("http2: Transport received %s", http2summarizeFrame(f)) + } + if !gotSettings { + if _, ok := f.(*http2SettingsFrame); !ok { + cc.logf("protocol error: received %T before a SETTINGS frame", f) + return http2ConnectionError(http2ErrCodeProtocol) + } + gotSettings = true + } + + switch f := f.(type) { + case *http2MetaHeadersFrame: + err = rl.processHeaders(f) + case *http2DataFrame: + err = rl.processData(f) + case *http2GoAwayFrame: + err = rl.processGoAway(f) + case *http2RSTStreamFrame: + err = rl.processResetStream(f) + case *http2SettingsFrame: + err = rl.processSettings(f) + case *http2PushPromiseFrame: + err = rl.processPushPromise(f) + case *http2WindowUpdateFrame: + err = rl.processWindowUpdate(f) + case *http2PingFrame: + err = rl.processPing(f) + default: + cc.logf("Transport: unhandled response frame type %T", f) + } + if err != nil { + if http2VerboseLogs { + cc.vlogf("http2: Transport conn %p received error from processing frame %v: %v", cc, http2summarizeFrame(f), err) + } + return err + } + } +} + +func (rl *http2clientConnReadLoop) processHeaders(f *http2MetaHeadersFrame) error { + cs := rl.streamByID(f.StreamID, http2headerOrDataFrame) + if cs == nil { + // We'd get here if we canceled a request while the + // server had its response still in flight. So if this + // was just something we canceled, ignore it. + return nil + } + if cs.readClosed { + rl.endStreamError(cs, http2StreamError{ + StreamID: f.StreamID, + Code: http2ErrCodeProtocol, + Cause: errors.New("protocol error: headers after END_STREAM"), + }) + return nil + } + if !cs.firstByte { + if cs.trace != nil { + // TODO(bradfitz): move first response byte earlier, + // when we first read the 9 byte header, not waiting + // until all the HEADERS+CONTINUATION frames have been + // merged. This works for now. + http2traceFirstResponseByte(cs.trace) + } + cs.firstByte = true + } + if !cs.pastHeaders { + cs.pastHeaders = true + } else { + return rl.processTrailers(cs, f) + } + + res, err := rl.handleResponse(cs, f) + if err != nil { + if _, ok := err.(http2ConnectionError); ok { + return err + } + // Any other error type is a stream error. + rl.endStreamError(cs, http2StreamError{ + StreamID: f.StreamID, + Code: http2ErrCodeProtocol, + Cause: err, + }) + return nil // return nil from process* funcs to keep conn alive + } + if res == nil { + // (nil, nil) special case. See handleResponse docs. + return nil + } + cs.resTrailer = &res.Trailer + cs.res = res + close(cs.respHeaderRecv) + if f.StreamEnded() { + rl.endStream(cs) + } + return nil +} + +// may return error types nil, or ConnectionError. Any other error value +// is a StreamError of type ErrCodeProtocol. The returned error in that case +// is the detail. +// +// As a special case, handleResponse may return (nil, nil) to skip the +// frame (currently only used for 1xx responses). +func (rl *http2clientConnReadLoop) handleResponse(cs *http2clientStream, f *http2MetaHeadersFrame) (*Response, error) { + if f.Truncated { + return nil, http2errResponseHeaderListSize + } + + status := f.PseudoValue("status") + if status == "" { + return nil, errors.New("malformed response from server: missing status pseudo header") + } + statusCode, err := strconv.Atoi(status) + if err != nil { + return nil, errors.New("malformed response from server: malformed non-numeric status pseudo header") + } + + regularFields := f.RegularFields() + strs := make([]string, len(regularFields)) + header := make(Header, len(regularFields)) + res := &Response{ + Proto: "HTTP/2.0", + ProtoMajor: 2, + Header: header, + StatusCode: statusCode, + Status: status + " " + StatusText(statusCode), + } + for _, hf := range regularFields { + key := httpcommon.CanonicalHeader(hf.Name) + if key == "Trailer" { + t := res.Trailer + if t == nil { + t = make(Header) + res.Trailer = t + } + http2foreachHeaderElement(hf.Value, func(v string) { + t[httpcommon.CanonicalHeader(v)] = nil + }) + } else { + vv := header[key] + if vv == nil && len(strs) > 0 { + // More than likely this will be a single-element key. + // Most headers aren't multi-valued. + // Set the capacity on strs[0] to 1, so any future append + // won't extend the slice into the other strings. + vv, strs = strs[:1:1], strs[1:] + vv[0] = hf.Value + header[key] = vv + } else { + header[key] = append(vv, hf.Value) + } + } + } + + if statusCode >= 100 && statusCode <= 199 { + if f.StreamEnded() { + return nil, errors.New("1xx informational response with END_STREAM flag") + } + if fn := cs.get1xxTraceFunc(); fn != nil { + // If the 1xx response is being delivered to the user, + // then they're responsible for limiting the number + // of responses. + if err := fn(statusCode, textproto.MIMEHeader(header)); err != nil { + return nil, err + } + } else { + // If the user didn't examine the 1xx response, then we + // limit the size of all 1xx headers. + // + // This differs a bit from the HTTP/1 implementation, which + // limits the size of all 1xx headers plus the final response. + // Use the larger limit of MaxHeaderListSize and + // net/http.Transport.MaxResponseHeaderBytes. + limit := int64(cs.cc.t.maxHeaderListSize()) + if t1 := cs.cc.t.t1; t1 != nil && t1.MaxResponseHeaderBytes > limit { + limit = t1.MaxResponseHeaderBytes + } + for _, h := range f.Fields { + cs.totalHeaderSize += int64(h.Size()) + } + if cs.totalHeaderSize > limit { + if http2VerboseLogs { + log.Printf("http2: 1xx informational responses too large") + } + return nil, errors.New("header list too large") + } + } + if statusCode == 100 { + http2traceGot100Continue(cs.trace) + select { + case cs.on100 <- struct{}{}: + default: + } + } + cs.pastHeaders = false // do it all again + return nil, nil + } + + res.ContentLength = -1 + if clens := res.Header["Content-Length"]; len(clens) == 1 { + if cl, err := strconv.ParseUint(clens[0], 10, 63); err == nil { + res.ContentLength = int64(cl) + } else { + // TODO: care? unlike http/1, it won't mess up our framing, so it's + // more safe smuggling-wise to ignore. + } + } else if len(clens) > 1 { + // TODO: care? unlike http/1, it won't mess up our framing, so it's + // more safe smuggling-wise to ignore. + } else if f.StreamEnded() && !cs.isHead { + res.ContentLength = 0 + } + + if cs.isHead { + res.Body = http2noBody + return res, nil + } + + if f.StreamEnded() { + if res.ContentLength > 0 { + res.Body = http2missingBody{} + } else { + res.Body = http2noBody + } + return res, nil + } + + cs.bufPipe.setBuffer(&http2dataBuffer{expected: res.ContentLength}) + cs.bytesRemain = res.ContentLength + res.Body = http2transportResponseBody{cs} + + if cs.requestedGzip && http2asciiEqualFold(res.Header.Get("Content-Encoding"), "gzip") { + res.Header.Del("Content-Encoding") + res.Header.Del("Content-Length") + res.ContentLength = -1 + res.Body = &http2gzipReader{body: res.Body} + res.Uncompressed = true + } + return res, nil +} + +func (rl *http2clientConnReadLoop) processTrailers(cs *http2clientStream, f *http2MetaHeadersFrame) error { + if cs.pastTrailers { + // Too many HEADERS frames for this stream. + return http2ConnectionError(http2ErrCodeProtocol) + } + cs.pastTrailers = true + if !f.StreamEnded() { + // We expect that any headers for trailers also + // has END_STREAM. + return http2ConnectionError(http2ErrCodeProtocol) + } + if len(f.PseudoFields()) > 0 { + // No pseudo header fields are defined for trailers. + // TODO: ConnectionError might be overly harsh? Check. + return http2ConnectionError(http2ErrCodeProtocol) + } + + trailer := make(Header) + for _, hf := range f.RegularFields() { + key := httpcommon.CanonicalHeader(hf.Name) + trailer[key] = append(trailer[key], hf.Value) + } + cs.trailer = trailer + + rl.endStream(cs) + return nil +} + +// transportResponseBody is the concrete type of Transport.RoundTrip's +// Response.Body. It is an io.ReadCloser. +type http2transportResponseBody struct { + cs *http2clientStream +} + +func (b http2transportResponseBody) Read(p []byte) (n int, err error) { + cs := b.cs + cc := cs.cc + + if cs.readErr != nil { + return 0, cs.readErr + } + n, err = b.cs.bufPipe.Read(p) + if cs.bytesRemain != -1 { + if int64(n) > cs.bytesRemain { + n = int(cs.bytesRemain) + if err == nil { + err = errors.New("net/http: server replied with more than declared Content-Length; truncated") + cs.abortStream(err) + } + cs.readErr = err + return int(cs.bytesRemain), err + } + cs.bytesRemain -= int64(n) + if err == io.EOF && cs.bytesRemain > 0 { + err = io.ErrUnexpectedEOF + cs.readErr = err + return n, err + } + } + if n == 0 { + // No flow control tokens to send back. + return + } + + cc.mu.Lock() + connAdd := cc.inflow.add(n) + var streamAdd int32 + if err == nil { // No need to refresh if the stream is over or failed. + streamAdd = cs.inflow.add(n) + } + cc.mu.Unlock() + + if connAdd != 0 || streamAdd != 0 { + cc.wmu.Lock() + defer cc.wmu.Unlock() + if connAdd != 0 { + cc.fr.WriteWindowUpdate(0, http2mustUint31(connAdd)) + } + if streamAdd != 0 { + cc.fr.WriteWindowUpdate(cs.ID, http2mustUint31(streamAdd)) + } + cc.bw.Flush() + } + return +} + +var http2errClosedResponseBody = errors.New("http2: response body closed") + +func (b http2transportResponseBody) Close() error { + cs := b.cs + cc := cs.cc + + cs.bufPipe.BreakWithError(http2errClosedResponseBody) + cs.abortStream(http2errClosedResponseBody) + + unread := cs.bufPipe.Len() + if unread > 0 { + cc.mu.Lock() + // Return connection-level flow control. + connAdd := cc.inflow.add(unread) + cc.mu.Unlock() + + // TODO(dneil): Acquiring this mutex can block indefinitely. + // Move flow control return to a goroutine? + cc.wmu.Lock() + // Return connection-level flow control. + if connAdd > 0 { + cc.fr.WriteWindowUpdate(0, uint32(connAdd)) + } + cc.bw.Flush() + cc.wmu.Unlock() + } + + select { + case <-cs.donec: + case <-cs.ctx.Done(): + // See golang/go#49366: The net/http package can cancel the + // request context after the response body is fully read. + // Don't treat this as an error. + return nil + case <-cs.reqCancel: + return http2errRequestCanceled + } + return nil +} + +func (rl *http2clientConnReadLoop) processData(f *http2DataFrame) error { + cc := rl.cc + cs := rl.streamByID(f.StreamID, http2headerOrDataFrame) + data := f.Data() + if cs == nil { + cc.mu.Lock() + neverSent := cc.nextStreamID + cc.mu.Unlock() + if f.StreamID >= neverSent { + // We never asked for this. + cc.logf("http2: Transport received unsolicited DATA frame; closing connection") + return http2ConnectionError(http2ErrCodeProtocol) + } + // We probably did ask for this, but canceled. Just ignore it. + // TODO: be stricter here? only silently ignore things which + // we canceled, but not things which were closed normally + // by the peer? Tough without accumulating too much state. + + // But at least return their flow control: + if f.Length > 0 { + cc.mu.Lock() + ok := cc.inflow.take(f.Length) + connAdd := cc.inflow.add(int(f.Length)) + cc.mu.Unlock() + if !ok { + return http2ConnectionError(http2ErrCodeFlowControl) + } + if connAdd > 0 { + cc.wmu.Lock() + cc.fr.WriteWindowUpdate(0, uint32(connAdd)) + cc.bw.Flush() + cc.wmu.Unlock() + } + } + return nil + } + if cs.readClosed { + cc.logf("protocol error: received DATA after END_STREAM") + rl.endStreamError(cs, http2StreamError{ + StreamID: f.StreamID, + Code: http2ErrCodeProtocol, + }) + return nil + } + if !cs.pastHeaders { + cc.logf("protocol error: received DATA before a HEADERS frame") + rl.endStreamError(cs, http2StreamError{ + StreamID: f.StreamID, + Code: http2ErrCodeProtocol, + }) + return nil + } + if f.Length > 0 { + if cs.isHead && len(data) > 0 { + cc.logf("protocol error: received DATA on a HEAD request") + rl.endStreamError(cs, http2StreamError{ + StreamID: f.StreamID, + Code: http2ErrCodeProtocol, + }) + return nil + } + // Check connection-level flow control. + cc.mu.Lock() + if !http2takeInflows(&cc.inflow, &cs.inflow, f.Length) { + cc.mu.Unlock() + return http2ConnectionError(http2ErrCodeFlowControl) + } + // Return any padded flow control now, since we won't + // refund it later on body reads. + var refund int + if pad := int(f.Length) - len(data); pad > 0 { + refund += pad + } + + didReset := false + var err error + if len(data) > 0 { + if _, err = cs.bufPipe.Write(data); err != nil { + // Return len(data) now if the stream is already closed, + // since data will never be read. + didReset = true + refund += len(data) + } + } + + sendConn := cc.inflow.add(refund) + var sendStream int32 + if !didReset { + sendStream = cs.inflow.add(refund) + } + cc.mu.Unlock() + + if sendConn > 0 || sendStream > 0 { + cc.wmu.Lock() + if sendConn > 0 { + cc.fr.WriteWindowUpdate(0, uint32(sendConn)) + } + if sendStream > 0 { + cc.fr.WriteWindowUpdate(cs.ID, uint32(sendStream)) + } + cc.bw.Flush() + cc.wmu.Unlock() + } + + if err != nil { + rl.endStreamError(cs, err) + return nil + } + } + + if f.StreamEnded() { + rl.endStream(cs) + } + return nil +} + +func (rl *http2clientConnReadLoop) endStream(cs *http2clientStream) { + // TODO: check that any declared content-length matches, like + // server.go's (*stream).endStream method. + if !cs.readClosed { + cs.readClosed = true + // Close cs.bufPipe and cs.peerClosed with cc.mu held to avoid a + // race condition: The caller can read io.EOF from Response.Body + // and close the body before we close cs.peerClosed, causing + // cleanupWriteRequest to send a RST_STREAM. + rl.cc.mu.Lock() + defer rl.cc.mu.Unlock() + cs.bufPipe.closeWithErrorAndCode(io.EOF, cs.copyTrailers) + close(cs.peerClosed) + } +} + +func (rl *http2clientConnReadLoop) endStreamError(cs *http2clientStream, err error) { + cs.readAborted = true + cs.abortStream(err) +} + +// Constants passed to streamByID for documentation purposes. +const ( + http2headerOrDataFrame = true + http2notHeaderOrDataFrame = false +) + +// streamByID returns the stream with the given id, or nil if no stream has that id. +// If headerOrData is true, it clears rst.StreamPingsBlocked. +func (rl *http2clientConnReadLoop) streamByID(id uint32, headerOrData bool) *http2clientStream { + rl.cc.mu.Lock() + defer rl.cc.mu.Unlock() + if headerOrData { + // Work around an unfortunate gRPC behavior. + // See comment on ClientConn.rstStreamPingsBlocked for details. + rl.cc.rstStreamPingsBlocked = false + } + cs := rl.cc.streams[id] + if cs != nil && !cs.readAborted { + return cs + } + return nil +} + +func (cs *http2clientStream) copyTrailers() { + for k, vv := range cs.trailer { + t := cs.resTrailer + if *t == nil { + *t = make(Header) + } + (*t)[k] = vv + } +} + +func (rl *http2clientConnReadLoop) processGoAway(f *http2GoAwayFrame) error { + cc := rl.cc + cc.t.connPool().MarkDead(cc) + if f.ErrCode != 0 { + // TODO: deal with GOAWAY more. particularly the error code + cc.vlogf("transport got GOAWAY with error code = %v", f.ErrCode) + if fn := cc.t.CountError; fn != nil { + fn("recv_goaway_" + f.ErrCode.stringToken()) + } + } + cc.setGoAway(f) + return nil +} + +func (rl *http2clientConnReadLoop) processSettings(f *http2SettingsFrame) error { + cc := rl.cc + // Locking both mu and wmu here allows frame encoding to read settings with only wmu held. + // Acquiring wmu when f.IsAck() is unnecessary, but convenient and mostly harmless. + cc.wmu.Lock() + defer cc.wmu.Unlock() + + if err := rl.processSettingsNoWrite(f); err != nil { + return err + } + if !f.IsAck() { + cc.fr.WriteSettingsAck() + cc.bw.Flush() + } + return nil +} + +func (rl *http2clientConnReadLoop) processSettingsNoWrite(f *http2SettingsFrame) error { + cc := rl.cc + cc.mu.Lock() + defer cc.mu.Unlock() + + if f.IsAck() { + if cc.wantSettingsAck { + cc.wantSettingsAck = false + return nil + } + return http2ConnectionError(http2ErrCodeProtocol) + } + + var seenMaxConcurrentStreams bool + err := f.ForeachSetting(func(s http2Setting) error { + switch s.ID { + case http2SettingMaxFrameSize: + cc.maxFrameSize = s.Val + case http2SettingMaxConcurrentStreams: + cc.maxConcurrentStreams = s.Val + seenMaxConcurrentStreams = true + case http2SettingMaxHeaderListSize: + cc.peerMaxHeaderListSize = uint64(s.Val) + case http2SettingInitialWindowSize: + // Values above the maximum flow-control + // window size of 2^31-1 MUST be treated as a + // connection error (Section 5.4.1) of type + // FLOW_CONTROL_ERROR. + if s.Val > math.MaxInt32 { + return http2ConnectionError(http2ErrCodeFlowControl) + } + + // Adjust flow control of currently-open + // frames by the difference of the old initial + // window size and this one. + delta := int32(s.Val) - int32(cc.initialWindowSize) + for _, cs := range cc.streams { + cs.flow.add(delta) + } + cc.cond.Broadcast() + + cc.initialWindowSize = s.Val + case http2SettingHeaderTableSize: + cc.henc.SetMaxDynamicTableSize(s.Val) + cc.peerMaxHeaderTableSize = s.Val + case http2SettingEnableConnectProtocol: + if err := s.Valid(); err != nil { + return err + } + // If the peer wants to send us SETTINGS_ENABLE_CONNECT_PROTOCOL, + // we require that it do so in the first SETTINGS frame. + // + // When we attempt to use extended CONNECT, we wait for the first + // SETTINGS frame to see if the server supports it. If we let the + // server enable the feature with a later SETTINGS frame, then + // users will see inconsistent results depending on whether we've + // seen that frame or not. + if !cc.seenSettings { + cc.extendedConnectAllowed = s.Val == 1 + } + default: + cc.vlogf("Unhandled Setting: %v", s) + } + return nil + }) + if err != nil { + return err + } + + if !cc.seenSettings { + if !seenMaxConcurrentStreams { + // This was the servers initial SETTINGS frame and it + // didn't contain a MAX_CONCURRENT_STREAMS field so + // increase the number of concurrent streams this + // connection can establish to our default. + cc.maxConcurrentStreams = http2defaultMaxConcurrentStreams + } + close(cc.seenSettingsChan) + cc.seenSettings = true + } + + return nil +} + +func (rl *http2clientConnReadLoop) processWindowUpdate(f *http2WindowUpdateFrame) error { + cc := rl.cc + cs := rl.streamByID(f.StreamID, http2notHeaderOrDataFrame) + if f.StreamID != 0 && cs == nil { + return nil + } + + cc.mu.Lock() + defer cc.mu.Unlock() + + fl := &cc.flow + if cs != nil { + fl = &cs.flow + } + if !fl.add(int32(f.Increment)) { + // For stream, the sender sends RST_STREAM with an error code of FLOW_CONTROL_ERROR + if cs != nil { + rl.endStreamError(cs, http2StreamError{ + StreamID: f.StreamID, + Code: http2ErrCodeFlowControl, + }) + return nil + } + + return http2ConnectionError(http2ErrCodeFlowControl) + } + cc.cond.Broadcast() + return nil +} + +func (rl *http2clientConnReadLoop) processResetStream(f *http2RSTStreamFrame) error { + cs := rl.streamByID(f.StreamID, http2notHeaderOrDataFrame) + if cs == nil { + // TODO: return error if server tries to RST_STREAM an idle stream + return nil + } + serr := http2streamError(cs.ID, f.ErrCode) + serr.Cause = http2errFromPeer + if f.ErrCode == http2ErrCodeProtocol { + rl.cc.SetDoNotReuse() + } + if fn := cs.cc.t.CountError; fn != nil { + fn("recv_rststream_" + f.ErrCode.stringToken()) + } + cs.abortStream(serr) + + cs.bufPipe.CloseWithError(serr) + return nil +} + +// Ping sends a PING frame to the server and waits for the ack. +func (cc *http2ClientConn) Ping(ctx context.Context) error { + c := make(chan struct{}) + // Generate a random payload + var p [8]byte + for { + if _, err := rand.Read(p[:]); err != nil { + return err + } + cc.mu.Lock() + // check for dup before insert + if _, found := cc.pings[p]; !found { + cc.pings[p] = c + cc.mu.Unlock() + break + } + cc.mu.Unlock() + } + var pingError error + errc := make(chan struct{}) + go func() { + cc.wmu.Lock() + defer cc.wmu.Unlock() + if pingError = cc.fr.WritePing(false, p); pingError != nil { + close(errc) + return + } + if pingError = cc.bw.Flush(); pingError != nil { + close(errc) + return + } + }() + select { + case <-c: + return nil + case <-errc: + return pingError + case <-ctx.Done(): + return ctx.Err() + case <-cc.readerDone: + // connection closed + return cc.readerErr + } +} + +func (rl *http2clientConnReadLoop) processPing(f *http2PingFrame) error { + if f.IsAck() { + cc := rl.cc + cc.mu.Lock() + defer cc.mu.Unlock() + // If ack, notify listener if any + if c, ok := cc.pings[f.Data]; ok { + close(c) + delete(cc.pings, f.Data) + } + if cc.pendingResets > 0 { + // See clientStream.cleanupWriteRequest. + cc.pendingResets = 0 + cc.rstStreamPingsBlocked = true + cc.cond.Broadcast() + } + return nil + } + cc := rl.cc + cc.wmu.Lock() + defer cc.wmu.Unlock() + if err := cc.fr.WritePing(true, f.Data); err != nil { + return err + } + return cc.bw.Flush() +} + +func (rl *http2clientConnReadLoop) processPushPromise(f *http2PushPromiseFrame) error { + // We told the peer we don't want them. + // Spec says: + // "PUSH_PROMISE MUST NOT be sent if the SETTINGS_ENABLE_PUSH + // setting of the peer endpoint is set to 0. An endpoint that + // has set this setting and has received acknowledgement MUST + // treat the receipt of a PUSH_PROMISE frame as a connection + // error (Section 5.4.1) of type PROTOCOL_ERROR." + return http2ConnectionError(http2ErrCodeProtocol) +} + +// writeStreamReset sends a RST_STREAM frame. +// When ping is true, it also sends a PING frame with a random payload. +func (cc *http2ClientConn) writeStreamReset(streamID uint32, code http2ErrCode, ping bool, err error) { + // TODO: map err to more interesting error codes, once the + // HTTP community comes up with some. But currently for + // RST_STREAM there's no equivalent to GOAWAY frame's debug + // data, and the error codes are all pretty vague ("cancel"). + cc.wmu.Lock() + cc.fr.WriteRSTStream(streamID, code) + if ping { + var payload [8]byte + rand.Read(payload[:]) + cc.fr.WritePing(false, payload) + } + cc.bw.Flush() + cc.wmu.Unlock() +} + +var ( + http2errResponseHeaderListSize = errors.New("http2: response header list larger than advertised limit") + http2errRequestHeaderListSize = httpcommon.ErrRequestHeaderListSize +) + +func (cc *http2ClientConn) logf(format string, args ...interface{}) { + cc.t.logf(format, args...) +} + +func (cc *http2ClientConn) vlogf(format string, args ...interface{}) { + cc.t.vlogf(format, args...) +} + +func (t *http2Transport) vlogf(format string, args ...interface{}) { + if http2VerboseLogs { + t.logf(format, args...) + } +} + +func (t *http2Transport) logf(format string, args ...interface{}) { + log.Printf(format, args...) +} + +var http2noBody io.ReadCloser = http2noBodyReader{} + +type http2noBodyReader struct{} + +func (http2noBodyReader) Close() error { return nil } + +func (http2noBodyReader) Read([]byte) (int, error) { return 0, io.EOF } + +type http2missingBody struct{} + +func (http2missingBody) Close() error { return nil } + +func (http2missingBody) Read([]byte) (int, error) { return 0, io.ErrUnexpectedEOF } + +func http2strSliceContains(ss []string, s string) bool { + for _, v := range ss { + if v == s { + return true + } + } + return false +} + +type http2erringRoundTripper struct{ err error } + +func (rt http2erringRoundTripper) RoundTripErr() error { return rt.err } + +func (rt http2erringRoundTripper) RoundTrip(*Request) (*Response, error) { return nil, rt.err } + +// gzipReader wraps a response body so it can lazily +// call gzip.NewReader on the first call to Read +type http2gzipReader struct { + _ http2incomparable + body io.ReadCloser // underlying Response.Body + zr *gzip.Reader // lazily-initialized gzip reader + zerr error // sticky error +} + +func (gz *http2gzipReader) Read(p []byte) (n int, err error) { + if gz.zerr != nil { + return 0, gz.zerr + } + if gz.zr == nil { + gz.zr, err = gzip.NewReader(gz.body) + if err != nil { + gz.zerr = err + return 0, err + } + } + return gz.zr.Read(p) +} + +func (gz *http2gzipReader) Close() error { + if err := gz.body.Close(); err != nil { + return err + } + gz.zerr = fs.ErrClosed + return nil +} + +type http2errorReader struct{ err error } + +func (r http2errorReader) Read(p []byte) (int, error) { return 0, r.err } + +// isConnectionCloseRequest reports whether req should use its own +// connection for a single request and then close the connection. +func http2isConnectionCloseRequest(req *Request) bool { + return req.Close || httpguts.HeaderValuesContainsToken(req.Header["Connection"], "close") +} + +// registerHTTPSProtocol calls Transport.RegisterProtocol but +// converting panics into errors. +func http2registerHTTPSProtocol(t *Transport, rt http2noDialH2RoundTripper) (err error) { + defer func() { + if e := recover(); e != nil { + err = fmt.Errorf("%v", e) + } + }() + t.RegisterProtocol("https", rt) + return nil +} + +// noDialH2RoundTripper is a RoundTripper which only tries to complete the request +// if there's already has a cached connection to the host. +// (The field is exported so it can be accessed via reflect from net/http; tested +// by TestNoDialH2RoundTripperType) +type http2noDialH2RoundTripper struct{ *http2Transport } + +func (rt http2noDialH2RoundTripper) RoundTrip(req *Request) (*Response, error) { + res, err := rt.http2Transport.RoundTrip(req) + if http2isNoCachedConnError(err) { + return nil, ErrSkipAltProtocol + } + return res, err +} + +func (t *http2Transport) idleConnTimeout() time.Duration { + // to keep things backwards compatible, we use non-zero values of + // IdleConnTimeout, followed by using the IdleConnTimeout on the underlying + // http1 transport, followed by 0 + if t.IdleConnTimeout != 0 { + return t.IdleConnTimeout + } + + if t.t1 != nil { + return t.t1.IdleConnTimeout + } + + return 0 +} + +func http2traceGetConn(req *Request, hostPort string) { + trace := httptrace.ContextClientTrace(req.Context()) + if trace == nil || trace.GetConn == nil { + return + } + trace.GetConn(hostPort) +} + +func http2traceGotConn(req *Request, cc *http2ClientConn, reused bool) { + trace := httptrace.ContextClientTrace(req.Context()) + if trace == nil || trace.GotConn == nil { + return + } + ci := httptrace.GotConnInfo{Conn: cc.tconn} + ci.Reused = reused + cc.mu.Lock() + ci.WasIdle = len(cc.streams) == 0 && reused + if ci.WasIdle && !cc.lastActive.IsZero() { + ci.IdleTime = time.Since(cc.lastActive) + } + cc.mu.Unlock() + + trace.GotConn(ci) +} + +func http2traceWroteHeaders(trace *httptrace.ClientTrace) { + if trace != nil && trace.WroteHeaders != nil { + trace.WroteHeaders() + } +} + +func http2traceGot100Continue(trace *httptrace.ClientTrace) { + if trace != nil && trace.Got100Continue != nil { + trace.Got100Continue() + } +} + +func http2traceWait100Continue(trace *httptrace.ClientTrace) { + if trace != nil && trace.Wait100Continue != nil { + trace.Wait100Continue() + } +} + +func http2traceWroteRequest(trace *httptrace.ClientTrace, err error) { + if trace != nil && trace.WroteRequest != nil { + trace.WroteRequest(httptrace.WroteRequestInfo{Err: err}) + } +} + +func http2traceFirstResponseByte(trace *httptrace.ClientTrace) { + if trace != nil && trace.GotFirstResponseByte != nil { + trace.GotFirstResponseByte() + } +} + +func http2traceGot1xxResponseFunc(trace *httptrace.ClientTrace) func(int, textproto.MIMEHeader) error { + if trace != nil { + return trace.Got1xxResponse + } + return nil +} + +// dialTLSWithContext uses tls.Dialer, added in Go 1.15, to open a TLS +// connection. +func (t *http2Transport) dialTLSWithContext(ctx context.Context, network, addr string, cfg *tls.Config) (*tls.Conn, error) { + dialer := &tls.Dialer{ + Config: cfg, + } + cn, err := dialer.DialContext(ctx, network, addr) + if err != nil { + return nil, err + } + tlsCn := cn.(*tls.Conn) // DialContext comment promises this will always succeed + return tlsCn, nil +} + +const http2nextProtoUnencryptedHTTP2 = "unencrypted_http2" + +// unencryptedNetConnFromTLSConn retrieves a net.Conn wrapped in a *tls.Conn. +// +// TLSNextProto functions accept a *tls.Conn. +// +// When passing an unencrypted HTTP/2 connection to a TLSNextProto function, +// we pass a *tls.Conn with an underlying net.Conn containing the unencrypted connection. +// To be extra careful about mistakes (accidentally dropping TLS encryption in a place +// where we want it), the tls.Conn contains a net.Conn with an UnencryptedNetConn method +// that returns the actual connection we want to use. +func http2unencryptedNetConnFromTLSConn(tc *tls.Conn) (net.Conn, error) { + conner, ok := tc.NetConn().(interface { + UnencryptedNetConn() net.Conn + }) + if !ok { + return nil, errors.New("http2: TLS conn unexpectedly found in unencrypted handoff") + } + return conner.UnencryptedNetConn(), nil +} + +// writeFramer is implemented by any type that is used to write frames. +type http2writeFramer interface { + writeFrame(http2writeContext) error + + // staysWithinBuffer reports whether this writer promises that + // it will only write less than or equal to size bytes, and it + // won't Flush the write context. + staysWithinBuffer(size int) bool +} + +// writeContext is the interface needed by the various frame writer +// types below. All the writeFrame methods below are scheduled via the +// frame writing scheduler (see writeScheduler in writesched.go). +// +// This interface is implemented by *serverConn. +// +// TODO: decide whether to a) use this in the client code (which didn't +// end up using this yet, because it has a simpler design, not +// currently implementing priorities), or b) delete this and +// make the server code a bit more concrete. +type http2writeContext interface { + Framer() *http2Framer + Flush() error + CloseConn() error + // HeaderEncoder returns an HPACK encoder that writes to the + // returned buffer. + HeaderEncoder() (*hpack.Encoder, *bytes.Buffer) +} + +// writeEndsStream reports whether w writes a frame that will transition +// the stream to a half-closed local state. This returns false for RST_STREAM, +// which closes the entire stream (not just the local half). +func http2writeEndsStream(w http2writeFramer) bool { + switch v := w.(type) { + case *http2writeData: + return v.endStream + case *http2writeResHeaders: + return v.endStream + case nil: + // This can only happen if the caller reuses w after it's + // been intentionally nil'ed out to prevent use. Keep this + // here to catch future refactoring breaking it. + panic("writeEndsStream called on nil writeFramer") + } + return false +} + +type http2flushFrameWriter struct{} + +func (http2flushFrameWriter) writeFrame(ctx http2writeContext) error { + return ctx.Flush() +} + +func (http2flushFrameWriter) staysWithinBuffer(max int) bool { return false } + +type http2writeSettings []http2Setting + +func (s http2writeSettings) staysWithinBuffer(max int) bool { + const settingSize = 6 // uint16 + uint32 + return http2frameHeaderLen+settingSize*len(s) <= max + +} + +func (s http2writeSettings) writeFrame(ctx http2writeContext) error { + return ctx.Framer().WriteSettings([]http2Setting(s)...) +} + +type http2writeGoAway struct { + maxStreamID uint32 + code http2ErrCode +} + +func (p *http2writeGoAway) writeFrame(ctx http2writeContext) error { + err := ctx.Framer().WriteGoAway(p.maxStreamID, p.code, nil) + ctx.Flush() // ignore error: we're hanging up on them anyway + return err +} + +func (*http2writeGoAway) staysWithinBuffer(max int) bool { return false } // flushes + +type http2writeData struct { + streamID uint32 + p []byte + endStream bool +} + +func (w *http2writeData) String() string { + return fmt.Sprintf("writeData(stream=%d, p=%d, endStream=%v)", w.streamID, len(w.p), w.endStream) +} + +func (w *http2writeData) writeFrame(ctx http2writeContext) error { + return ctx.Framer().WriteData(w.streamID, w.endStream, w.p) +} + +func (w *http2writeData) staysWithinBuffer(max int) bool { + return http2frameHeaderLen+len(w.p) <= max +} + +// handlerPanicRST is the message sent from handler goroutines when +// the handler panics. +type http2handlerPanicRST struct { + StreamID uint32 +} + +func (hp http2handlerPanicRST) writeFrame(ctx http2writeContext) error { + return ctx.Framer().WriteRSTStream(hp.StreamID, http2ErrCodeInternal) +} + +func (hp http2handlerPanicRST) staysWithinBuffer(max int) bool { return http2frameHeaderLen+4 <= max } + +func (se http2StreamError) writeFrame(ctx http2writeContext) error { + return ctx.Framer().WriteRSTStream(se.StreamID, se.Code) +} + +func (se http2StreamError) staysWithinBuffer(max int) bool { return http2frameHeaderLen+4 <= max } + +type http2writePing struct { + data [8]byte +} + +func (w http2writePing) writeFrame(ctx http2writeContext) error { + return ctx.Framer().WritePing(false, w.data) +} + +func (w http2writePing) staysWithinBuffer(max int) bool { + return http2frameHeaderLen+len(w.data) <= max +} + +type http2writePingAck struct{ pf *http2PingFrame } + +func (w http2writePingAck) writeFrame(ctx http2writeContext) error { + return ctx.Framer().WritePing(true, w.pf.Data) +} + +func (w http2writePingAck) staysWithinBuffer(max int) bool { + return http2frameHeaderLen+len(w.pf.Data) <= max +} + +type http2writeSettingsAck struct{} + +func (http2writeSettingsAck) writeFrame(ctx http2writeContext) error { + return ctx.Framer().WriteSettingsAck() +} + +func (http2writeSettingsAck) staysWithinBuffer(max int) bool { return http2frameHeaderLen <= max } + +// splitHeaderBlock splits headerBlock into fragments so that each fragment fits +// in a single frame, then calls fn for each fragment. firstFrag/lastFrag are true +// for the first/last fragment, respectively. +func http2splitHeaderBlock(ctx http2writeContext, headerBlock []byte, fn func(ctx http2writeContext, frag []byte, firstFrag, lastFrag bool) error) error { + // For now we're lazy and just pick the minimum MAX_FRAME_SIZE + // that all peers must support (16KB). Later we could care + // more and send larger frames if the peer advertised it, but + // there's little point. Most headers are small anyway (so we + // generally won't have CONTINUATION frames), and extra frames + // only waste 9 bytes anyway. + const maxFrameSize = 16384 + + first := true + for len(headerBlock) > 0 { + frag := headerBlock + if len(frag) > maxFrameSize { + frag = frag[:maxFrameSize] + } + headerBlock = headerBlock[len(frag):] + if err := fn(ctx, frag, first, len(headerBlock) == 0); err != nil { + return err + } + first = false + } + return nil +} + +// writeResHeaders is a request to write a HEADERS and 0+ CONTINUATION frames +// for HTTP response headers or trailers from a server handler. +type http2writeResHeaders struct { + streamID uint32 + httpResCode int // 0 means no ":status" line + h Header // may be nil + trailers []string // if non-nil, which keys of h to write. nil means all. + endStream bool + + date string + contentType string + contentLength string +} + +func http2encKV(enc *hpack.Encoder, k, v string) { + if http2VerboseLogs { + log.Printf("http2: server encoding header %q = %q", k, v) + } + enc.WriteField(hpack.HeaderField{Name: k, Value: v}) +} + +func (w *http2writeResHeaders) staysWithinBuffer(max int) bool { + // TODO: this is a common one. It'd be nice to return true + // here and get into the fast path if we could be clever and + // calculate the size fast enough, or at least a conservative + // upper bound that usually fires. (Maybe if w.h and + // w.trailers are nil, so we don't need to enumerate it.) + // Otherwise I'm afraid that just calculating the length to + // answer this question would be slower than the ~2µs benefit. + return false +} + +func (w *http2writeResHeaders) writeFrame(ctx http2writeContext) error { + enc, buf := ctx.HeaderEncoder() + buf.Reset() + + if w.httpResCode != 0 { + http2encKV(enc, ":status", http2httpCodeString(w.httpResCode)) + } + + http2encodeHeaders(enc, w.h, w.trailers) + + if w.contentType != "" { + http2encKV(enc, "content-type", w.contentType) + } + if w.contentLength != "" { + http2encKV(enc, "content-length", w.contentLength) + } + if w.date != "" { + http2encKV(enc, "date", w.date) + } + + headerBlock := buf.Bytes() + if len(headerBlock) == 0 && w.trailers == nil { + panic("unexpected empty hpack") + } + + return http2splitHeaderBlock(ctx, headerBlock, w.writeHeaderBlock) +} + +func (w *http2writeResHeaders) writeHeaderBlock(ctx http2writeContext, frag []byte, firstFrag, lastFrag bool) error { + if firstFrag { + return ctx.Framer().WriteHeaders(http2HeadersFrameParam{ + StreamID: w.streamID, + BlockFragment: frag, + EndStream: w.endStream, + EndHeaders: lastFrag, + }) + } else { + return ctx.Framer().WriteContinuation(w.streamID, lastFrag, frag) + } +} + +// writePushPromise is a request to write a PUSH_PROMISE and 0+ CONTINUATION frames. +type http2writePushPromise struct { + streamID uint32 // pusher stream + method string // for :method + url *url.URL // for :scheme, :authority, :path + h Header + + // Creates an ID for a pushed stream. This runs on serveG just before + // the frame is written. The returned ID is copied to promisedID. + allocatePromisedID func() (uint32, error) + promisedID uint32 +} + +func (w *http2writePushPromise) staysWithinBuffer(max int) bool { + // TODO: see writeResHeaders.staysWithinBuffer + return false +} + +func (w *http2writePushPromise) writeFrame(ctx http2writeContext) error { + enc, buf := ctx.HeaderEncoder() + buf.Reset() + + http2encKV(enc, ":method", w.method) + http2encKV(enc, ":scheme", w.url.Scheme) + http2encKV(enc, ":authority", w.url.Host) + http2encKV(enc, ":path", w.url.RequestURI()) + http2encodeHeaders(enc, w.h, nil) + + headerBlock := buf.Bytes() + if len(headerBlock) == 0 { + panic("unexpected empty hpack") + } + + return http2splitHeaderBlock(ctx, headerBlock, w.writeHeaderBlock) +} + +func (w *http2writePushPromise) writeHeaderBlock(ctx http2writeContext, frag []byte, firstFrag, lastFrag bool) error { + if firstFrag { + return ctx.Framer().WritePushPromise(http2PushPromiseParam{ + StreamID: w.streamID, + PromiseID: w.promisedID, + BlockFragment: frag, + EndHeaders: lastFrag, + }) + } else { + return ctx.Framer().WriteContinuation(w.streamID, lastFrag, frag) + } +} + +type http2write100ContinueHeadersFrame struct { + streamID uint32 +} + +func (w http2write100ContinueHeadersFrame) writeFrame(ctx http2writeContext) error { + enc, buf := ctx.HeaderEncoder() + buf.Reset() + http2encKV(enc, ":status", "100") + return ctx.Framer().WriteHeaders(http2HeadersFrameParam{ + StreamID: w.streamID, + BlockFragment: buf.Bytes(), + EndStream: false, + EndHeaders: true, + }) +} + +func (w http2write100ContinueHeadersFrame) staysWithinBuffer(max int) bool { + // Sloppy but conservative: + return 9+2*(len(":status")+len("100")) <= max +} + +type http2writeWindowUpdate struct { + streamID uint32 // or 0 for conn-level + n uint32 +} + +func (wu http2writeWindowUpdate) staysWithinBuffer(max int) bool { return http2frameHeaderLen+4 <= max } + +func (wu http2writeWindowUpdate) writeFrame(ctx http2writeContext) error { + return ctx.Framer().WriteWindowUpdate(wu.streamID, wu.n) +} + +// encodeHeaders encodes an http.Header. If keys is not nil, then (k, h[k]) +// is encoded only if k is in keys. +func http2encodeHeaders(enc *hpack.Encoder, h Header, keys []string) { + if keys == nil { + sorter := http2sorterPool.Get().(*http2sorter) + // Using defer here, since the returned keys from the + // sorter.Keys method is only valid until the sorter + // is returned: + defer http2sorterPool.Put(sorter) + keys = sorter.Keys(h) + } + for _, k := range keys { + vv := h[k] + k, ascii := httpcommon.LowerHeader(k) + if !ascii { + // Skip writing invalid headers. Per RFC 7540, Section 8.1.2, header + // field names have to be ASCII characters (just as in HTTP/1.x). + continue + } + if !http2validWireHeaderFieldName(k) { + // Skip it as backup paranoia. Per + // golang.org/issue/14048, these should + // already be rejected at a higher level. + continue + } + isTE := k == "transfer-encoding" + for _, v := range vv { + if !httpguts.ValidHeaderFieldValue(v) { + // TODO: return an error? golang.org/issue/14048 + // For now just omit it. + continue + } + // TODO: more of "8.1.2.2 Connection-Specific Header Fields" + if isTE && v != "trailers" { + continue + } + http2encKV(enc, k, v) + } + } +} + +// WriteScheduler is the interface implemented by HTTP/2 write schedulers. +// Methods are never called concurrently. +type http2WriteScheduler interface { + // OpenStream opens a new stream in the write scheduler. + // It is illegal to call this with streamID=0 or with a streamID that is + // already open -- the call may panic. + OpenStream(streamID uint32, options http2OpenStreamOptions) + + // CloseStream closes a stream in the write scheduler. Any frames queued on + // this stream should be discarded. It is illegal to call this on a stream + // that is not open -- the call may panic. + CloseStream(streamID uint32) + + // AdjustStream adjusts the priority of the given stream. This may be called + // on a stream that has not yet been opened or has been closed. Note that + // RFC 7540 allows PRIORITY frames to be sent on streams in any state. See: + // https://tools.ietf.org/html/rfc7540#section-5.1 + AdjustStream(streamID uint32, priority http2PriorityParam) + + // Push queues a frame in the scheduler. In most cases, this will not be + // called with wr.StreamID()!=0 unless that stream is currently open. The one + // exception is RST_STREAM frames, which may be sent on idle or closed streams. + Push(wr http2FrameWriteRequest) + + // Pop dequeues the next frame to write. Returns false if no frames can + // be written. Frames with a given wr.StreamID() are Pop'd in the same + // order they are Push'd, except RST_STREAM frames. No frames should be + // discarded except by CloseStream. + Pop() (wr http2FrameWriteRequest, ok bool) +} + +// OpenStreamOptions specifies extra options for WriteScheduler.OpenStream. +type http2OpenStreamOptions struct { + // PusherID is zero if the stream was initiated by the client. Otherwise, + // PusherID names the stream that pushed the newly opened stream. + PusherID uint32 + // priority is used to set the priority of the newly opened stream. + priority http2PriorityParam +} + +// FrameWriteRequest is a request to write a frame. +type http2FrameWriteRequest struct { + // write is the interface value that does the writing, once the + // WriteScheduler has selected this frame to write. The write + // functions are all defined in write.go. + write http2writeFramer + + // stream is the stream on which this frame will be written. + // nil for non-stream frames like PING and SETTINGS. + // nil for RST_STREAM streams, which use the StreamError.StreamID field instead. + stream *http2stream + + // done, if non-nil, must be a buffered channel with space for + // 1 message and is sent the return value from write (or an + // earlier error) when the frame has been written. + done chan error +} + +// StreamID returns the id of the stream this frame will be written to. +// 0 is used for non-stream frames such as PING and SETTINGS. +func (wr http2FrameWriteRequest) StreamID() uint32 { + if wr.stream == nil { + if se, ok := wr.write.(http2StreamError); ok { + // (*serverConn).resetStream doesn't set + // stream because it doesn't necessarily have + // one. So special case this type of write + // message. + return se.StreamID + } + return 0 + } + return wr.stream.id +} + +// isControl reports whether wr is a control frame for MaxQueuedControlFrames +// purposes. That includes non-stream frames and RST_STREAM frames. +func (wr http2FrameWriteRequest) isControl() bool { + return wr.stream == nil +} + +// DataSize returns the number of flow control bytes that must be consumed +// to write this entire frame. This is 0 for non-DATA frames. +func (wr http2FrameWriteRequest) DataSize() int { + if wd, ok := wr.write.(*http2writeData); ok { + return len(wd.p) + } + return 0 +} + +// Consume consumes min(n, available) bytes from this frame, where available +// is the number of flow control bytes available on the stream. Consume returns +// 0, 1, or 2 frames, where the integer return value gives the number of frames +// returned. +// +// If flow control prevents consuming any bytes, this returns (_, _, 0). If +// the entire frame was consumed, this returns (wr, _, 1). Otherwise, this +// returns (consumed, rest, 2), where 'consumed' contains the consumed bytes and +// 'rest' contains the remaining bytes. The consumed bytes are deducted from the +// underlying stream's flow control budget. +func (wr http2FrameWriteRequest) Consume(n int32) (http2FrameWriteRequest, http2FrameWriteRequest, int) { + var empty http2FrameWriteRequest + + // Non-DATA frames are always consumed whole. + wd, ok := wr.write.(*http2writeData) + if !ok || len(wd.p) == 0 { + return wr, empty, 1 + } + + // Might need to split after applying limits. + allowed := wr.stream.flow.available() + if n < allowed { + allowed = n + } + if wr.stream.sc.maxFrameSize < allowed { + allowed = wr.stream.sc.maxFrameSize + } + if allowed <= 0 { + return empty, empty, 0 + } + if len(wd.p) > int(allowed) { + wr.stream.flow.take(allowed) + consumed := http2FrameWriteRequest{ + stream: wr.stream, + write: &http2writeData{ + streamID: wd.streamID, + p: wd.p[:allowed], + // Even if the original had endStream set, there + // are bytes remaining because len(wd.p) > allowed, + // so we know endStream is false. + endStream: false, + }, + // Our caller is blocking on the final DATA frame, not + // this intermediate frame, so no need to wait. + done: nil, + } + rest := http2FrameWriteRequest{ + stream: wr.stream, + write: &http2writeData{ + streamID: wd.streamID, + p: wd.p[allowed:], + endStream: wd.endStream, + }, + done: wr.done, + } + return consumed, rest, 2 + } + + // The frame is consumed whole. + // NB: This cast cannot overflow because allowed is <= math.MaxInt32. + wr.stream.flow.take(int32(len(wd.p))) + return wr, empty, 1 +} + +// String is for debugging only. +func (wr http2FrameWriteRequest) String() string { + var des string + if s, ok := wr.write.(fmt.Stringer); ok { + des = s.String() + } else { + des = fmt.Sprintf("%T", wr.write) + } + return fmt.Sprintf("[FrameWriteRequest stream=%d, ch=%v, writer=%v]", wr.StreamID(), wr.done != nil, des) +} + +// replyToWriter sends err to wr.done and panics if the send must block +// This does nothing if wr.done is nil. +func (wr *http2FrameWriteRequest) replyToWriter(err error) { + if wr.done == nil { + return + } + select { + case wr.done <- err: + default: + panic(fmt.Sprintf("unbuffered done channel passed in for type %T", wr.write)) + } + wr.write = nil // prevent use (assume it's tainted after wr.done send) +} + +// writeQueue is used by implementations of WriteScheduler. +type http2writeQueue struct { + s []http2FrameWriteRequest + prev, next *http2writeQueue +} + +func (q *http2writeQueue) empty() bool { return len(q.s) == 0 } + +func (q *http2writeQueue) push(wr http2FrameWriteRequest) { + q.s = append(q.s, wr) +} + +func (q *http2writeQueue) shift() http2FrameWriteRequest { + if len(q.s) == 0 { + panic("invalid use of queue") + } + wr := q.s[0] + // TODO: less copy-happy queue. + copy(q.s, q.s[1:]) + q.s[len(q.s)-1] = http2FrameWriteRequest{} + q.s = q.s[:len(q.s)-1] + return wr +} + +// consume consumes up to n bytes from q.s[0]. If the frame is +// entirely consumed, it is removed from the queue. If the frame +// is partially consumed, the frame is kept with the consumed +// bytes removed. Returns true iff any bytes were consumed. +func (q *http2writeQueue) consume(n int32) (http2FrameWriteRequest, bool) { + if len(q.s) == 0 { + return http2FrameWriteRequest{}, false + } + consumed, rest, numresult := q.s[0].Consume(n) + switch numresult { + case 0: + return http2FrameWriteRequest{}, false + case 1: + q.shift() + case 2: + q.s[0] = rest + } + return consumed, true +} + +type http2writeQueuePool []*http2writeQueue + +// put inserts an unused writeQueue into the pool. + +// put inserts an unused writeQueue into the pool. +func (p *http2writeQueuePool) put(q *http2writeQueue) { + for i := range q.s { + q.s[i] = http2FrameWriteRequest{} + } + q.s = q.s[:0] + *p = append(*p, q) +} + +// get returns an empty writeQueue. +func (p *http2writeQueuePool) get() *http2writeQueue { + ln := len(*p) + if ln == 0 { + return new(http2writeQueue) + } + x := ln - 1 + q := (*p)[x] + (*p)[x] = nil + *p = (*p)[:x] + return q +} + +// RFC 7540, Section 5.3.5: the default weight is 16. +const http2priorityDefaultWeightRFC7540 = 15 // 16 = 15 + 1 + +// PriorityWriteSchedulerConfig configures a priorityWriteScheduler. +type http2PriorityWriteSchedulerConfig struct { + // MaxClosedNodesInTree controls the maximum number of closed streams to + // retain in the priority tree. Setting this to zero saves a small amount + // of memory at the cost of performance. + // + // See RFC 7540, Section 5.3.4: + // "It is possible for a stream to become closed while prioritization + // information ... is in transit. ... This potentially creates suboptimal + // prioritization, since the stream could be given a priority that is + // different from what is intended. To avoid these problems, an endpoint + // SHOULD retain stream prioritization state for a period after streams + // become closed. The longer state is retained, the lower the chance that + // streams are assigned incorrect or default priority values." + MaxClosedNodesInTree int + + // MaxIdleNodesInTree controls the maximum number of idle streams to + // retain in the priority tree. Setting this to zero saves a small amount + // of memory at the cost of performance. + // + // See RFC 7540, Section 5.3.4: + // Similarly, streams that are in the "idle" state can be assigned + // priority or become a parent of other streams. This allows for the + // creation of a grouping node in the dependency tree, which enables + // more flexible expressions of priority. Idle streams begin with a + // default priority (Section 5.3.5). + MaxIdleNodesInTree int + + // ThrottleOutOfOrderWrites enables write throttling to help ensure that + // data is delivered in priority order. This works around a race where + // stream B depends on stream A and both streams are about to call Write + // to queue DATA frames. If B wins the race, a naive scheduler would eagerly + // write as much data from B as possible, but this is suboptimal because A + // is a higher-priority stream. With throttling enabled, we write a small + // amount of data from B to minimize the amount of bandwidth that B can + // steal from A. + ThrottleOutOfOrderWrites bool +} + +// NewPriorityWriteScheduler constructs a WriteScheduler that schedules +// frames by following HTTP/2 priorities as described in RFC 7540 Section 5.3. +// If cfg is nil, default options are used. +func http2NewPriorityWriteScheduler(cfg *http2PriorityWriteSchedulerConfig) http2WriteScheduler { + if cfg == nil { + // For justification of these defaults, see: + // https://docs.google.com/document/d/1oLhNg1skaWD4_DtaoCxdSRN5erEXrH-KnLrMwEpOtFY + cfg = &http2PriorityWriteSchedulerConfig{ + MaxClosedNodesInTree: 10, + MaxIdleNodesInTree: 10, + ThrottleOutOfOrderWrites: false, + } + } + + ws := &http2priorityWriteSchedulerRFC7540{ + nodes: make(map[uint32]*http2priorityNodeRFC7540), + maxClosedNodesInTree: cfg.MaxClosedNodesInTree, + maxIdleNodesInTree: cfg.MaxIdleNodesInTree, + enableWriteThrottle: cfg.ThrottleOutOfOrderWrites, + } + ws.nodes[0] = &ws.root + if cfg.ThrottleOutOfOrderWrites { + ws.writeThrottleLimit = 1024 + } else { + ws.writeThrottleLimit = math.MaxInt32 + } + return ws +} + +type http2priorityNodeStateRFC7540 int + +const ( + http2priorityNodeOpenRFC7540 http2priorityNodeStateRFC7540 = iota + http2priorityNodeClosedRFC7540 + http2priorityNodeIdleRFC7540 +) + +// priorityNodeRFC7540 is a node in an HTTP/2 priority tree. +// Each node is associated with a single stream ID. +// See RFC 7540, Section 5.3. +type http2priorityNodeRFC7540 struct { + q http2writeQueue // queue of pending frames to write + id uint32 // id of the stream, or 0 for the root of the tree + weight uint8 // the actual weight is weight+1, so the value is in [1,256] + state http2priorityNodeStateRFC7540 // open | closed | idle + bytes int64 // number of bytes written by this node, or 0 if closed + subtreeBytes int64 // sum(node.bytes) of all nodes in this subtree + + // These links form the priority tree. + parent *http2priorityNodeRFC7540 + kids *http2priorityNodeRFC7540 // start of the kids list + prev, next *http2priorityNodeRFC7540 // doubly-linked list of siblings +} + +func (n *http2priorityNodeRFC7540) setParent(parent *http2priorityNodeRFC7540) { + if n == parent { + panic("setParent to self") + } + if n.parent == parent { + return + } + // Unlink from current parent. + if parent := n.parent; parent != nil { + if n.prev == nil { + parent.kids = n.next + } else { + n.prev.next = n.next + } + if n.next != nil { + n.next.prev = n.prev + } + } + // Link to new parent. + // If parent=nil, remove n from the tree. + // Always insert at the head of parent.kids (this is assumed by walkReadyInOrder). + n.parent = parent + if parent == nil { + n.next = nil + n.prev = nil + } else { + n.next = parent.kids + n.prev = nil + if n.next != nil { + n.next.prev = n + } + parent.kids = n + } +} + +func (n *http2priorityNodeRFC7540) addBytes(b int64) { + n.bytes += b + for ; n != nil; n = n.parent { + n.subtreeBytes += b + } +} + +// walkReadyInOrder iterates over the tree in priority order, calling f for each node +// with a non-empty write queue. When f returns true, this function returns true and the +// walk halts. tmp is used as scratch space for sorting. +// +// f(n, openParent) takes two arguments: the node to visit, n, and a bool that is true +// if any ancestor p of n is still open (ignoring the root node). +func (n *http2priorityNodeRFC7540) walkReadyInOrder(openParent bool, tmp *[]*http2priorityNodeRFC7540, f func(*http2priorityNodeRFC7540, bool) bool) bool { + if !n.q.empty() && f(n, openParent) { + return true + } + if n.kids == nil { + return false + } + + // Don't consider the root "open" when updating openParent since + // we can't send data frames on the root stream (only control frames). + if n.id != 0 { + openParent = openParent || (n.state == http2priorityNodeOpenRFC7540) + } + + // Common case: only one kid or all kids have the same weight. + // Some clients don't use weights; other clients (like web browsers) + // use mostly-linear priority trees. + w := n.kids.weight + needSort := false + for k := n.kids.next; k != nil; k = k.next { + if k.weight != w { + needSort = true + break + } + } + if !needSort { + for k := n.kids; k != nil; k = k.next { + if k.walkReadyInOrder(openParent, tmp, f) { + return true + } + } + return false + } + + // Uncommon case: sort the child nodes. We remove the kids from the parent, + // then re-insert after sorting so we can reuse tmp for future sort calls. + *tmp = (*tmp)[:0] + for n.kids != nil { + *tmp = append(*tmp, n.kids) + n.kids.setParent(nil) + } + sort.Sort(http2sortPriorityNodeSiblingsRFC7540(*tmp)) + for i := len(*tmp) - 1; i >= 0; i-- { + (*tmp)[i].setParent(n) // setParent inserts at the head of n.kids + } + for k := n.kids; k != nil; k = k.next { + if k.walkReadyInOrder(openParent, tmp, f) { + return true + } + } + return false +} + +type http2sortPriorityNodeSiblingsRFC7540 []*http2priorityNodeRFC7540 + +func (z http2sortPriorityNodeSiblingsRFC7540) Len() int { return len(z) } + +func (z http2sortPriorityNodeSiblingsRFC7540) Swap(i, k int) { z[i], z[k] = z[k], z[i] } + +func (z http2sortPriorityNodeSiblingsRFC7540) Less(i, k int) bool { + // Prefer the subtree that has sent fewer bytes relative to its weight. + // See sections 5.3.2 and 5.3.4. + wi, bi := float64(z[i].weight+1), float64(z[i].subtreeBytes) + wk, bk := float64(z[k].weight+1), float64(z[k].subtreeBytes) + if bi == 0 && bk == 0 { + return wi >= wk + } + if bk == 0 { + return false + } + return bi/bk <= wi/wk +} + +type http2priorityWriteSchedulerRFC7540 struct { + // root is the root of the priority tree, where root.id = 0. + // The root queues control frames that are not associated with any stream. + root http2priorityNodeRFC7540 + + // nodes maps stream ids to priority tree nodes. + nodes map[uint32]*http2priorityNodeRFC7540 + + // maxID is the maximum stream id in nodes. + maxID uint32 + + // lists of nodes that have been closed or are idle, but are kept in + // the tree for improved prioritization. When the lengths exceed either + // maxClosedNodesInTree or maxIdleNodesInTree, old nodes are discarded. + closedNodes, idleNodes []*http2priorityNodeRFC7540 + + // From the config. + maxClosedNodesInTree int + maxIdleNodesInTree int + writeThrottleLimit int32 + enableWriteThrottle bool + + // tmp is scratch space for priorityNode.walkReadyInOrder to reduce allocations. + tmp []*http2priorityNodeRFC7540 + + // pool of empty queues for reuse. + queuePool http2writeQueuePool +} + +func (ws *http2priorityWriteSchedulerRFC7540) OpenStream(streamID uint32, options http2OpenStreamOptions) { + // The stream may be currently idle but cannot be opened or closed. + if curr := ws.nodes[streamID]; curr != nil { + if curr.state != http2priorityNodeIdleRFC7540 { + panic(fmt.Sprintf("stream %d already opened", streamID)) + } + curr.state = http2priorityNodeOpenRFC7540 + return + } + + // RFC 7540, Section 5.3.5: + // "All streams are initially assigned a non-exclusive dependency on stream 0x0. + // Pushed streams initially depend on their associated stream. In both cases, + // streams are assigned a default weight of 16." + parent := ws.nodes[options.PusherID] + if parent == nil { + parent = &ws.root + } + n := &http2priorityNodeRFC7540{ + q: *ws.queuePool.get(), + id: streamID, + weight: http2priorityDefaultWeightRFC7540, + state: http2priorityNodeOpenRFC7540, + } + n.setParent(parent) + ws.nodes[streamID] = n + if streamID > ws.maxID { + ws.maxID = streamID + } +} + +func (ws *http2priorityWriteSchedulerRFC7540) CloseStream(streamID uint32) { + if streamID == 0 { + panic("violation of WriteScheduler interface: cannot close stream 0") + } + if ws.nodes[streamID] == nil { + panic(fmt.Sprintf("violation of WriteScheduler interface: unknown stream %d", streamID)) + } + if ws.nodes[streamID].state != http2priorityNodeOpenRFC7540 { + panic(fmt.Sprintf("violation of WriteScheduler interface: stream %d already closed", streamID)) + } + + n := ws.nodes[streamID] + n.state = http2priorityNodeClosedRFC7540 + n.addBytes(-n.bytes) + + q := n.q + ws.queuePool.put(&q) + n.q.s = nil + if ws.maxClosedNodesInTree > 0 { + ws.addClosedOrIdleNode(&ws.closedNodes, ws.maxClosedNodesInTree, n) + } else { + ws.removeNode(n) + } +} + +func (ws *http2priorityWriteSchedulerRFC7540) AdjustStream(streamID uint32, priority http2PriorityParam) { + if streamID == 0 { + panic("adjustPriority on root") + } + + // If streamID does not exist, there are two cases: + // - A closed stream that has been removed (this will have ID <= maxID) + // - An idle stream that is being used for "grouping" (this will have ID > maxID) + n := ws.nodes[streamID] + if n == nil { + if streamID <= ws.maxID || ws.maxIdleNodesInTree == 0 { + return + } + ws.maxID = streamID + n = &http2priorityNodeRFC7540{ + q: *ws.queuePool.get(), + id: streamID, + weight: http2priorityDefaultWeightRFC7540, + state: http2priorityNodeIdleRFC7540, + } + n.setParent(&ws.root) + ws.nodes[streamID] = n + ws.addClosedOrIdleNode(&ws.idleNodes, ws.maxIdleNodesInTree, n) + } + + // Section 5.3.1: A dependency on a stream that is not currently in the tree + // results in that stream being given a default priority (Section 5.3.5). + parent := ws.nodes[priority.StreamDep] + if parent == nil { + n.setParent(&ws.root) + n.weight = http2priorityDefaultWeightRFC7540 + return + } + + // Ignore if the client tries to make a node its own parent. + if n == parent { + return + } + + // Section 5.3.3: + // "If a stream is made dependent on one of its own dependencies, the + // formerly dependent stream is first moved to be dependent on the + // reprioritized stream's previous parent. The moved dependency retains + // its weight." + // + // That is: if parent depends on n, move parent to depend on n.parent. + for x := parent.parent; x != nil; x = x.parent { + if x == n { + parent.setParent(n.parent) + break + } + } + + // Section 5.3.3: The exclusive flag causes the stream to become the sole + // dependency of its parent stream, causing other dependencies to become + // dependent on the exclusive stream. + if priority.Exclusive { + k := parent.kids + for k != nil { + next := k.next + if k != n { + k.setParent(n) + } + k = next + } + } + + n.setParent(parent) + n.weight = priority.Weight +} + +func (ws *http2priorityWriteSchedulerRFC7540) Push(wr http2FrameWriteRequest) { + var n *http2priorityNodeRFC7540 + if wr.isControl() { + n = &ws.root + } else { + id := wr.StreamID() + n = ws.nodes[id] + if n == nil { + // id is an idle or closed stream. wr should not be a HEADERS or + // DATA frame. In other case, we push wr onto the root, rather + // than creating a new priorityNode. + if wr.DataSize() > 0 { + panic("add DATA on non-open stream") + } + n = &ws.root + } + } + n.q.push(wr) +} + +func (ws *http2priorityWriteSchedulerRFC7540) Pop() (wr http2FrameWriteRequest, ok bool) { + ws.root.walkReadyInOrder(false, &ws.tmp, func(n *http2priorityNodeRFC7540, openParent bool) bool { + limit := int32(math.MaxInt32) + if openParent { + limit = ws.writeThrottleLimit + } + wr, ok = n.q.consume(limit) + if !ok { + return false + } + n.addBytes(int64(wr.DataSize())) + // If B depends on A and B continuously has data available but A + // does not, gradually increase the throttling limit to allow B to + // steal more and more bandwidth from A. + if openParent { + ws.writeThrottleLimit += 1024 + if ws.writeThrottleLimit < 0 { + ws.writeThrottleLimit = math.MaxInt32 + } + } else if ws.enableWriteThrottle { + ws.writeThrottleLimit = 1024 + } + return true + }) + return wr, ok +} + +func (ws *http2priorityWriteSchedulerRFC7540) addClosedOrIdleNode(list *[]*http2priorityNodeRFC7540, maxSize int, n *http2priorityNodeRFC7540) { + if maxSize == 0 { + return + } + if len(*list) == maxSize { + // Remove the oldest node, then shift left. + ws.removeNode((*list)[0]) + x := (*list)[1:] + copy(*list, x) + *list = (*list)[:len(x)] + } + *list = append(*list, n) +} + +func (ws *http2priorityWriteSchedulerRFC7540) removeNode(n *http2priorityNodeRFC7540) { + for n.kids != nil { + n.kids.setParent(n.parent) + } + n.setParent(nil) + delete(ws.nodes, n.id) +} + +type http2streamMetadata struct { + location *http2writeQueue + priority http2PriorityParam +} + +type http2priorityWriteSchedulerRFC9218 struct { + // control contains control frames (SETTINGS, PING, etc.). + control http2writeQueue + + // heads contain the head of a circular list of streams. + // We put these heads within a nested array that represents urgency and + // incremental, as defined in + // https://www.rfc-editor.org/rfc/rfc9218.html#name-priority-parameters. + // 8 represents u=0 up to u=7, and 2 represents i=false and i=true. + heads [8][2]*http2writeQueue + + // streams contains a mapping between each stream ID and their metadata, so + // we can quickly locate them when needing to, for example, adjust their + // priority. + streams map[uint32]http2streamMetadata + + // queuePool are empty queues for reuse. + queuePool http2writeQueuePool + + // prioritizeIncremental is used to determine whether we should prioritize + // incremental streams or not, when urgency is the same in a given Pop() + // call. + prioritizeIncremental bool +} + +func http2newPriorityWriteSchedulerRFC9128() http2WriteScheduler { + ws := &http2priorityWriteSchedulerRFC9218{ + streams: make(map[uint32]http2streamMetadata), + } + return ws +} + +func (ws *http2priorityWriteSchedulerRFC9218) OpenStream(streamID uint32, opt http2OpenStreamOptions) { + if ws.streams[streamID].location != nil { + panic(fmt.Errorf("stream %d already opened", streamID)) + } + q := ws.queuePool.get() + ws.streams[streamID] = http2streamMetadata{ + location: q, + priority: opt.priority, + } + + u, i := opt.priority.urgency, opt.priority.incremental + if ws.heads[u][i] == nil { + ws.heads[u][i] = q + q.next = q + q.prev = q + } else { + // Queues are stored in a ring. + // Insert the new stream before ws.head, putting it at the end of the list. + q.prev = ws.heads[u][i].prev + q.next = ws.heads[u][i] + q.prev.next = q + q.next.prev = q + } +} + +func (ws *http2priorityWriteSchedulerRFC9218) CloseStream(streamID uint32) { + metadata := ws.streams[streamID] + q, u, i := metadata.location, metadata.priority.urgency, metadata.priority.incremental + if q == nil { + return + } + if q.next == q { + // This was the only open stream. + ws.heads[u][i] = nil + } else { + q.prev.next = q.next + q.next.prev = q.prev + if ws.heads[u][i] == q { + ws.heads[u][i] = q.next + } + } + delete(ws.streams, streamID) + ws.queuePool.put(q) +} + +func (ws *http2priorityWriteSchedulerRFC9218) AdjustStream(streamID uint32, priority http2PriorityParam) { + metadata := ws.streams[streamID] + q, u, i := metadata.location, metadata.priority.urgency, metadata.priority.incremental + if q == nil { + return + } + + // Remove stream from current location. + if q.next == q { + // This was the only open stream. + ws.heads[u][i] = nil + } else { + q.prev.next = q.next + q.next.prev = q.prev + if ws.heads[u][i] == q { + ws.heads[u][i] = q.next + } + } + + // Insert stream to the new queue. + u, i = priority.urgency, priority.incremental + if ws.heads[u][i] == nil { + ws.heads[u][i] = q + q.next = q + q.prev = q + } else { + // Queues are stored in a ring. + // Insert the new stream before ws.head, putting it at the end of the list. + q.prev = ws.heads[u][i].prev + q.next = ws.heads[u][i] + q.prev.next = q + q.next.prev = q + } + + // Update the metadata. + ws.streams[streamID] = http2streamMetadata{ + location: q, + priority: priority, + } +} + +func (ws *http2priorityWriteSchedulerRFC9218) Push(wr http2FrameWriteRequest) { + if wr.isControl() { + ws.control.push(wr) + return + } + q := ws.streams[wr.StreamID()].location + if q == nil { + // This is a closed stream. + // wr should not be a HEADERS or DATA frame. + // We push the request onto the control queue. + if wr.DataSize() > 0 { + panic("add DATA on non-open stream") + } + ws.control.push(wr) + return + } + q.push(wr) +} + +func (ws *http2priorityWriteSchedulerRFC9218) Pop() (http2FrameWriteRequest, bool) { + // Control and RST_STREAM frames first. + if !ws.control.empty() { + return ws.control.shift(), true + } + + // On the next Pop(), we want to prioritize incremental if we prioritized + // non-incremental request of the same urgency this time. Vice-versa. + // i.e. when there are incremental and non-incremental requests at the same + // priority, we give 50% of our bandwidth to the incremental ones in + // aggregate and 50% to the first non-incremental one (since + // non-incremental streams do not use round-robin writes). + ws.prioritizeIncremental = !ws.prioritizeIncremental + + // Always prioritize lowest u (i.e. highest urgency level). + for u := range ws.heads { + for i := range ws.heads[u] { + // When we want to prioritize incremental, we try to pop i=true + // first before i=false when u is the same. + if ws.prioritizeIncremental { + i = (i + 1) % 2 + } + q := ws.heads[u][i] + if q == nil { + continue + } + for { + if wr, ok := q.consume(math.MaxInt32); ok { + if i == 1 { + // For incremental streams, we update head to q.next so + // we can round-robin between multiple streams that can + // immediately benefit from partial writes. + ws.heads[u][i] = q.next + } else { + // For non-incremental streams, we try to finish one to + // completion rather than doing round-robin. However, + // we update head here so that if q.consume() is !ok + // (e.g. the stream has no more frame to consume), head + // is updated to the next q that has frames to consume + // on future iterations. This way, we do not prioritize + // writing to unavailable stream on next Pop() calls, + // preventing head-of-line blocking. + ws.heads[u][i] = q + } + return wr, true + } + q = q.next + if q == ws.heads[u][i] { + break + } + } + + } + } + return http2FrameWriteRequest{}, false +} + +// NewRandomWriteScheduler constructs a WriteScheduler that ignores HTTP/2 +// priorities. Control frames like SETTINGS and PING are written before DATA +// frames, but if no control frames are queued and multiple streams have queued +// HEADERS or DATA frames, Pop selects a ready stream arbitrarily. +func http2NewRandomWriteScheduler() http2WriteScheduler { + return &http2randomWriteScheduler{sq: make(map[uint32]*http2writeQueue)} +} + +type http2randomWriteScheduler struct { + // zero are frames not associated with a specific stream. + zero http2writeQueue + + // sq contains the stream-specific queues, keyed by stream ID. + // When a stream is idle, closed, or emptied, it's deleted + // from the map. + sq map[uint32]*http2writeQueue + + // pool of empty queues for reuse. + queuePool http2writeQueuePool +} + +func (ws *http2randomWriteScheduler) OpenStream(streamID uint32, options http2OpenStreamOptions) { + // no-op: idle streams are not tracked +} + +func (ws *http2randomWriteScheduler) CloseStream(streamID uint32) { + q, ok := ws.sq[streamID] + if !ok { + return + } + delete(ws.sq, streamID) + ws.queuePool.put(q) +} + +func (ws *http2randomWriteScheduler) AdjustStream(streamID uint32, priority http2PriorityParam) { + // no-op: priorities are ignored +} + +func (ws *http2randomWriteScheduler) Push(wr http2FrameWriteRequest) { + if wr.isControl() { + ws.zero.push(wr) + return + } + id := wr.StreamID() + q, ok := ws.sq[id] + if !ok { + q = ws.queuePool.get() + ws.sq[id] = q + } + q.push(wr) +} + +func (ws *http2randomWriteScheduler) Pop() (http2FrameWriteRequest, bool) { + // Control and RST_STREAM frames first. + if !ws.zero.empty() { + return ws.zero.shift(), true + } + // Iterate over all non-idle streams until finding one that can be consumed. + for streamID, q := range ws.sq { + if wr, ok := q.consume(math.MaxInt32); ok { + if q.empty() { + delete(ws.sq, streamID) + ws.queuePool.put(q) + } + return wr, true + } + } + return http2FrameWriteRequest{}, false +} + +type http2roundRobinWriteScheduler struct { + // control contains control frames (SETTINGS, PING, etc.). + control http2writeQueue + + // streams maps stream ID to a queue. + streams map[uint32]*http2writeQueue + + // stream queues are stored in a circular linked list. + // head is the next stream to write, or nil if there are no streams open. + head *http2writeQueue + + // pool of empty queues for reuse. + queuePool http2writeQueuePool +} + +// newRoundRobinWriteScheduler constructs a new write scheduler. +// The round robin scheduler prioritizes control frames +// like SETTINGS and PING over DATA frames. +// When there are no control frames to send, it performs a round-robin +// selection from the ready streams. +func http2newRoundRobinWriteScheduler() http2WriteScheduler { + ws := &http2roundRobinWriteScheduler{ + streams: make(map[uint32]*http2writeQueue), + } + return ws +} + +func (ws *http2roundRobinWriteScheduler) OpenStream(streamID uint32, options http2OpenStreamOptions) { + if ws.streams[streamID] != nil { + panic(fmt.Errorf("stream %d already opened", streamID)) + } + q := ws.queuePool.get() + ws.streams[streamID] = q + if ws.head == nil { + ws.head = q + q.next = q + q.prev = q + } else { + // Queues are stored in a ring. + // Insert the new stream before ws.head, putting it at the end of the list. + q.prev = ws.head.prev + q.next = ws.head + q.prev.next = q + q.next.prev = q + } +} + +func (ws *http2roundRobinWriteScheduler) CloseStream(streamID uint32) { + q := ws.streams[streamID] + if q == nil { + return + } + if q.next == q { + // This was the only open stream. + ws.head = nil + } else { + q.prev.next = q.next + q.next.prev = q.prev + if ws.head == q { + ws.head = q.next + } + } + delete(ws.streams, streamID) + ws.queuePool.put(q) +} + +func (ws *http2roundRobinWriteScheduler) AdjustStream(streamID uint32, priority http2PriorityParam) {} + +func (ws *http2roundRobinWriteScheduler) Push(wr http2FrameWriteRequest) { + if wr.isControl() { + ws.control.push(wr) + return + } + q := ws.streams[wr.StreamID()] + if q == nil { + // This is a closed stream. + // wr should not be a HEADERS or DATA frame. + // We push the request onto the control queue. + if wr.DataSize() > 0 { + panic("add DATA on non-open stream") + } + ws.control.push(wr) + return + } + q.push(wr) +} + +func (ws *http2roundRobinWriteScheduler) Pop() (http2FrameWriteRequest, bool) { + // Control and RST_STREAM frames first. + if !ws.control.empty() { + return ws.control.shift(), true + } + if ws.head == nil { + return http2FrameWriteRequest{}, false + } + q := ws.head + for { + if wr, ok := q.consume(math.MaxInt32); ok { + ws.head = q.next + return wr, true + } + q = q.next + if q == ws.head { + break + } + } + return http2FrameWriteRequest{}, false +} diff --git a/backend/vendor/github.com/enetx/http/h2_error.go b/backend/vendor/github.com/enetx/http/h2_error.go new file mode 100644 index 0000000..2c0b21e --- /dev/null +++ b/backend/vendor/github.com/enetx/http/h2_error.go @@ -0,0 +1,37 @@ +// Copyright 2022 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build !nethttpomithttp2 + +package http + +import ( + "reflect" +) + +func (e http2StreamError) As(target any) bool { + dst := reflect.ValueOf(target).Elem() + dstType := dst.Type() + if dstType.Kind() != reflect.Struct { + return false + } + src := reflect.ValueOf(e) + srcType := src.Type() + numField := srcType.NumField() + if dstType.NumField() != numField { + return false + } + for i := 0; i < numField; i++ { + sf := srcType.Field(i) + df := dstType.Field(i) + if sf.Name != df.Name || !sf.Type.ConvertibleTo(df.Type) { + return false + } + } + for i := 0; i < numField; i++ { + df := dst.Field(i) + df.Set(src.Field(i).Convert(df.Type())) + } + return true +} diff --git a/backend/vendor/github.com/enetx/http/header.go b/backend/vendor/github.com/enetx/http/header.go new file mode 100644 index 0000000..ac66275 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/header.go @@ -0,0 +1,372 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http + +import ( + "io" + "net/textproto" + "sort" + "strings" + "sync" + "time" + + "github.com/enetx/http/httptrace" + "github.com/enetx/http/internal/ascii" + "golang.org/x/net/http/httpguts" +) + +// A Header represents the key-value pairs in an HTTP header. +// +// The keys should be in canonical form, as returned by +// [CanonicalHeaderKey]. +type Header map[string][]string + +// HeaderOrderKey is a magic key for ResponseWriter.Header map keys +// that, if present, defines a header order that will be used to +// write the headers onto wire. The order of the list defined how the headers +// will be sorted. A defined key goes before an undefined key. +// +// This is the only way to specify some order, because maps don't +// have a a stable iteration order. If no order is given, headers will +// be sorted lexicographically. +// +// According to RFC-2616 it is good practice to send general-header fields +// first, followed by request-header or response-header fields and ending +// with entity-header fields. +const HeaderOrderKey = "Header-Order:" + +// PHeaderOrderKey is a magic key for setting http2 pseudo header order. +// If the header is nil it will use regular GoLang header order. +// Valid fields are :authority, :method, :path, :scheme +const PHeaderOrderKey = "PHeader-Order:" + +// Add adds the key, value pair to the header. +// It appends to any existing values associated with key. +// The key is case insensitive; it is canonicalized by +// [CanonicalHeaderKey]. +func (h Header) Add(key, value string) { + textproto.MIMEHeader(h).Add(key, value) +} + +// Set sets the header entries associated with key to the +// single element value. It replaces any existing values +// associated with key. The key is case insensitive; it is +// canonicalized by [textproto.CanonicalMIMEHeaderKey]. +// To use non-canonical keys, assign to the map directly. +func (h Header) Set(key, value string) { + textproto.MIMEHeader(h).Set(key, value) +} + +// Get gets the first value associated with the given key. If +// there are no values associated with the key, Get returns "". +// It is case insensitive; [textproto.CanonicalMIMEHeaderKey] is +// used to canonicalize the provided key. Get assumes that all +// keys are stored in canonical form. To use non-canonical keys, +// access the map directly. +func (h Header) Get(key string) string { + return textproto.MIMEHeader(h).Get(key) +} + +// Values returns all values associated with the given key. +// It is case insensitive; [textproto.CanonicalMIMEHeaderKey] is +// used to canonicalize the provided key. To use non-canonical +// keys, access the map directly. +// The returned slice is not a copy. +func (h Header) Values(key string) []string { + return textproto.MIMEHeader(h).Values(key) +} + +// get is like Get, but key must already be in CanonicalHeaderKey form. +func (h Header) get(key string) string { + if v := h[key]; len(v) > 0 { + return v[0] + } + return "" +} + +// has reports whether h has the provided key defined, even if it's +// set to 0-length slice. +func (h Header) has(key string) bool { + _, ok := h[key] + return ok +} + +// Del deletes the values associated with key. +// The key is case insensitive; it is canonicalized by +// [CanonicalHeaderKey]. +func (h Header) Del(key string) { + textproto.MIMEHeader(h).Del(key) +} + +// Write writes a header in wire format. +func (h Header) Write(w io.Writer) error { + return h.write(w, nil) +} + +func (h Header) write(w io.Writer, trace *httptrace.ClientTrace) error { + return h.writeSubset(w, nil, trace) +} + +// Clone returns a copy of h or nil if h is nil. +func (h Header) Clone() Header { + if h == nil { + return nil + } + + // Find total number of values. + nv := 0 + for _, vv := range h { + nv += len(vv) + } + sv := make([]string, nv) // shared backing array for headers' values + h2 := make(Header, len(h)) + for k, vv := range h { + if vv == nil { + // Preserve nil values. ReverseProxy distinguishes + // between nil and zero-length header values. + h2[k] = nil + continue + } + n := copy(sv, vv) + h2[k] = sv[:n:n] + sv = sv[n:] + } + return h2 +} + +var timeFormats = []string{ + TimeFormat, + time.RFC850, + time.ANSIC, +} + +// ParseTime parses a time header (such as the Date: header), +// trying each of the three formats allowed by HTTP/1.1: +// [TimeFormat], [time.RFC850], and [time.ANSIC]. +func ParseTime(text string) (t time.Time, err error) { + for _, layout := range timeFormats { + t, err = time.Parse(layout, text) + if err == nil { + return + } + } + return +} + +var headerNewlineToSpace = strings.NewReplacer("\n", " ", "\r", " ") + +// stringWriter implements WriteString on a Writer. +type stringWriter struct { + w io.Writer +} + +func (w stringWriter) WriteString(s string) (n int, err error) { + return w.w.Write([]byte(s)) +} + +type HeaderKeyValues struct { + Key string + Values []string +} + +// A headerSorter implements sort.Interface by sorting a []keyValues +// by key. It's used as a pointer, so it can fit in a sort.Interface +// interface value without allocation. +type headerSorter struct { + kvs []HeaderKeyValues + order map[string]int +} + +func (s *headerSorter) Len() int { return len(s.kvs) } +func (s *headerSorter) Swap(i, j int) { s.kvs[i], s.kvs[j] = s.kvs[j], s.kvs[i] } +func (s *headerSorter) Less(i, j int) bool { + // If the order isn't defined, sort lexicographically. + if s.order == nil { + return s.kvs[i].Key < s.kvs[j].Key + } + + idxi, iok := s.order[strings.ToLower(s.kvs[i].Key)] + idxj, jok := s.order[strings.ToLower(s.kvs[j].Key)] + if !iok && !jok { + return s.kvs[i].Key < s.kvs[j].Key + } else if !iok && jok { + return false + } else if iok && !jok { + return true + } + + return idxi < idxj +} + +var headerSorterPool = sync.Pool{ + New: func() any { return new(headerSorter) }, +} + +var lock = sync.RWMutex{} + +// SortedKeyValues returns h's keys sorted in the returned kvs +// slice. The headerSorter used to sort is also returned, for possible +// return to headerSorterCache. +func (h Header) SortedKeyValues(exclude map[string]bool) (kvs []HeaderKeyValues, hs *headerSorter) { + hs = headerSorterPool.Get().(*headerSorter) + if cap(hs.kvs) < len(h) { + hs.kvs = make([]HeaderKeyValues, 0, len(h)) + } + + kvs = hs.kvs[:0] + for k, vv := range h { + lock.RLock() + if !exclude[k] { + kvs = append(kvs, HeaderKeyValues{k, vv}) + } + lock.RUnlock() + } + + hs.kvs = kvs + sort.Sort(hs) + + return kvs, hs +} + +func (h Header) SortedKeyValuesBy(order map[string]int, exclude map[string]bool) (kvs []HeaderKeyValues, hs *headerSorter) { + hs = headerSorterPool.Get().(*headerSorter) + if cap(hs.kvs) < len(h) { + hs.kvs = make([]HeaderKeyValues, 0, len(h)) + } + + kvs = hs.kvs[:0] + for k, vv := range h { + lock.RLock() + if !exclude[k] { + kvs = append(kvs, HeaderKeyValues{k, vv}) + } + lock.RUnlock() + } + + hs.kvs = kvs + hs.order = order + sort.Sort(hs) + + return kvs, hs +} + +// WriteSubset writes a header in wire format. +// If exclude is not nil, keys where exclude[key] == true are not written. +// Keys are not canonicalized before checking the exclude map. +func (h Header) WriteSubset(w io.Writer, exclude map[string]bool) error { + return h.writeSubset(w, exclude, nil) +} + +// WriteSubset writes a header in wire format. +// If exclude is not nil, keys where exclude[key] == true are not written. +func (h Header) writeSubset(w io.Writer, exclude map[string]bool, trace *httptrace.ClientTrace) error { + ws, ok := w.(io.StringWriter) + if !ok { + ws = stringWriter{w} + } + + var kvs []HeaderKeyValues + var sorter *headerSorter + + // Check if the HeaderOrder is defined. + if headerOrder, ok := h[HeaderOrderKey]; ok { + order := make(map[string]int) + for i, v := range headerOrder { + order[v] = i + } + + if exclude == nil { + exclude = make(map[string]bool) + } + + lock.Lock() + exclude[HeaderOrderKey] = true + exclude[PHeaderOrderKey] = true + lock.Unlock() + + kvs, sorter = h.SortedKeyValuesBy(order, exclude) + } else { + kvs, sorter = h.SortedKeyValues(exclude) + } + + var formattedVals []string + for _, kv := range kvs { + if !httpguts.ValidHeaderFieldName(kv.Key) { + // This could be an error. In the common case of + // writing response headers, however, we have no good + // way to provide the error back to the server + // handler, so just drop invalid headers instead. + continue + } + for _, v := range kv.Values { + v = headerNewlineToSpace.Replace(v) + v = textproto.TrimString(v) + for _, s := range []string{kv.Key, ": ", v, "\r\n"} { + if _, err := ws.WriteString(s); err != nil { + headerSorterPool.Put(sorter) + return err + } + } + if trace != nil && trace.WroteHeaderField != nil { + formattedVals = append(formattedVals, v) + } + } + if trace != nil && trace.WroteHeaderField != nil { + trace.WroteHeaderField(kv.Key, formattedVals) + formattedVals = nil + } + } + headerSorterPool.Put(sorter) + return nil +} + +// CanonicalHeaderKey returns the canonical format of the +// header key s. The canonicalization converts the first +// letter and any letter following a hyphen to upper case; +// the rest are converted to lowercase. For example, the +// canonical key for "accept-encoding" is "Accept-Encoding". +// If s contains a space or invalid header field bytes, it is +// returned without modifications. +func CanonicalHeaderKey(s string) string { return textproto.CanonicalMIMEHeaderKey(s) } + +// hasToken reports whether token appears with v, ASCII +// case-insensitive, with space or comma boundaries. +// token must be all lowercase. +// v may contain mixed cased. +func hasToken(v, token string) bool { + if len(token) > len(v) || token == "" { + return false + } + if v == token { + return true + } + for sp := 0; sp <= len(v)-len(token); sp++ { + // Check that first character is good. + // The token is ASCII, so checking only a single byte + // is sufficient. We skip this potential starting + // position if both the first byte and its potential + // ASCII uppercase equivalent (b|0x20) don't match. + // False positives ('^' => '~') are caught by EqualFold. + if b := v[sp]; b != token[0] && b|0x20 != token[0] { + continue + } + // Check that start pos is on a valid token boundary. + if sp > 0 && !isTokenBoundary(v[sp-1]) { + continue + } + // Check that end pos is on a valid token boundary. + if endPos := sp + len(token); endPos != len(v) && !isTokenBoundary(v[endPos]) { + continue + } + if ascii.EqualFold(v[sp:sp+len(token)], token) { + return true + } + } + return false +} + +func isTokenBoundary(b byte) bool { + return b == ' ' || b == ',' || b == '\t' +} diff --git a/backend/vendor/github.com/enetx/http/http.go b/backend/vendor/github.com/enetx/http/http.go new file mode 100644 index 0000000..904118e --- /dev/null +++ b/backend/vendor/github.com/enetx/http/http.go @@ -0,0 +1,297 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:generate bundle -o=h2_bundle.go -prefix=http2 -tags=!nethttpomithttp2 github.com/enetx/http2 + +package http + +import ( + "io" + "strconv" + "strings" + "time" + "unicode/utf8" + + "golang.org/x/net/http/httpguts" +) + +// Protocols is a set of HTTP protocols. +// The zero value is an empty set of protocols. +// +// The supported protocols are: +// +// - HTTP1 is the HTTP/1.0 and HTTP/1.1 protocols. +// HTTP1 is supported on both unsecured TCP and secured TLS connections. +// +// - HTTP2 is the HTTP/2 protcol over a TLS connection. +// +// - UnencryptedHTTP2 is the HTTP/2 protocol over an unsecured TCP connection. +type Protocols struct { + bits uint8 +} + +const ( + protoHTTP1 = 1 << iota + protoHTTP2 + protoUnencryptedHTTP2 +) + +// HTTP1 reports whether p includes HTTP/1. +func (p Protocols) HTTP1() bool { return p.bits&protoHTTP1 != 0 } + +// SetHTTP1 adds or removes HTTP/1 from p. +func (p *Protocols) SetHTTP1(ok bool) { p.setBit(protoHTTP1, ok) } + +// HTTP2 reports whether p includes HTTP/2. +func (p Protocols) HTTP2() bool { return p.bits&protoHTTP2 != 0 } + +// SetHTTP2 adds or removes HTTP/2 from p. +func (p *Protocols) SetHTTP2(ok bool) { p.setBit(protoHTTP2, ok) } + +// UnencryptedHTTP2 reports whether p includes unencrypted HTTP/2. +func (p Protocols) UnencryptedHTTP2() bool { return p.bits&protoUnencryptedHTTP2 != 0 } + +// SetUnencryptedHTTP2 adds or removes unencrypted HTTP/2 from p. +func (p *Protocols) SetUnencryptedHTTP2(ok bool) { p.setBit(protoUnencryptedHTTP2, ok) } + +func (p *Protocols) setBit(bit uint8, ok bool) { + if ok { + p.bits |= bit + } else { + p.bits &^= bit + } +} + +func (p Protocols) String() string { + var s []string + if p.HTTP1() { + s = append(s, "HTTP1") + } + if p.HTTP2() { + s = append(s, "HTTP2") + } + if p.UnencryptedHTTP2() { + s = append(s, "UnencryptedHTTP2") + } + return "{" + strings.Join(s, ",") + "}" +} + +// incomparable is a zero-width, non-comparable type. Adding it to a struct +// makes that struct also non-comparable, and generally doesn't add +// any size (as long as it's first). +type incomparable [0]func() + +// maxInt64 is the effective "infinite" value for the Server and +// Transport's byte-limiting readers. +const maxInt64 = 1<<63 - 1 + +// aLongTimeAgo is a non-zero time, far in the past, used for +// immediate cancellation of network operations. +var aLongTimeAgo = time.Unix(1, 0) + +// omitBundledHTTP2 is set by omithttp2.go when the nethttpomithttp2 +// build tag is set. That means h2_bundle.go isn't compiled in and we +// shouldn't try to use it. +var omitBundledHTTP2 bool + +// TODO(bradfitz): move common stuff here. The other files have accumulated +// generic http stuff in random places. + +// contextKey is a value for use with context.WithValue. It's used as +// a pointer so it fits in an interface{} without allocation. +type contextKey struct { + name string +} + +func (k *contextKey) String() string { return "net/http context value " + k.name } + +// Given a string of the form "host", "host:port", or "[ipv6::address]:port", +// return true if the string includes a port. +func hasPort(s string) bool { return strings.LastIndex(s, ":") > strings.LastIndex(s, "]") } + +// removeEmptyPort strips the empty port in ":port" to "" +// as mandated by RFC 3986 Section 6.2.3. +func removeEmptyPort(host string) string { + if hasPort(host) { + return strings.TrimSuffix(host, ":") + } + return host +} + +func isNotToken(r rune) bool { + return !httpguts.IsTokenRune(r) +} + +// isToken reports whether v is a valid token (https://www.rfc-editor.org/rfc/rfc2616#section-2.2). +func isToken(v string) bool { + // For historical reasons, this function is called ValidHeaderFieldName (see issue #67031). + return httpguts.ValidHeaderFieldName(v) +} + +// stringContainsCTLByte reports whether s contains any ASCII control character. +func stringContainsCTLByte(s string) bool { + for i := 0; i < len(s); i++ { + b := s[i] + if b < ' ' || b == 0x7f { + return true + } + } + return false +} + +func hexEscapeNonASCII(s string) string { + newLen := 0 + for i := 0; i < len(s); i++ { + if s[i] >= utf8.RuneSelf { + newLen += 3 + } else { + newLen++ + } + } + if newLen == len(s) { + return s + } + b := make([]byte, 0, newLen) + var pos int + for i := 0; i < len(s); i++ { + if s[i] >= utf8.RuneSelf { + if pos < i { + b = append(b, s[pos:i]...) + } + b = append(b, '%') + b = strconv.AppendInt(b, int64(s[i]), 16) + pos = i + 1 + } + } + if pos < len(s) { + b = append(b, s[pos:]...) + } + return string(b) +} + +// NoBody is an [io.ReadCloser] with no bytes. Read always returns EOF +// and Close always returns nil. It can be used in an outgoing client +// request to explicitly signal that a request has zero bytes. +// An alternative, however, is to simply set [Request.Body] to nil. +var NoBody = noBody{} + +type noBody struct{} + +func (noBody) Read([]byte) (int, error) { return 0, io.EOF } +func (noBody) Close() error { return nil } +func (noBody) WriteTo(io.Writer) (int64, error) { return 0, nil } + +var ( + // verify that an io.Copy from NoBody won't require a buffer: + _ io.WriterTo = NoBody + _ io.ReadCloser = NoBody +) + +// PushOptions describes options for [Pusher.Push]. +type PushOptions struct { + // Method specifies the HTTP method for the promised request. + // If set, it must be "GET" or "HEAD". Empty means "GET". + Method string + + // Header specifies additional promised request headers. This cannot + // include HTTP/2 pseudo header fields like ":path" and ":scheme", + // which will be added automatically. + Header Header +} + +// Pusher is the interface implemented by ResponseWriters that support +// HTTP/2 server push. For more background, see +// https://tools.ietf.org/html/rfc7540#section-8.2. +type Pusher interface { + // Push initiates an HTTP/2 server push. This constructs a synthetic + // request using the given target and options, serializes that request + // into a PUSH_PROMISE frame, then dispatches that request using the + // server's request handler. If opts is nil, default options are used. + // + // The target must either be an absolute path (like "/path") or an absolute + // URL that contains a valid host and the same scheme as the parent request. + // If the target is a path, it will inherit the scheme and host of the + // parent request. + // + // The HTTP/2 spec disallows recursive pushes and cross-authority pushes. + // Push may or may not detect these invalid pushes; however, invalid + // pushes will be detected and canceled by conforming clients. + // + // Handlers that wish to push URL X should call Push before sending any + // data that may trigger a request for URL X. This avoids a race where the + // client issues requests for X before receiving the PUSH_PROMISE for X. + // + // Push will run in a separate goroutine making the order of arrival + // non-deterministic. Any required synchronization needs to be implemented + // by the caller. + // + // Push returns ErrNotSupported if the client has disabled push or if push + // is not supported on the underlying connection. + Push(target string, opts *PushOptions) error +} + +// HTTP2Config defines HTTP/2 configuration parameters common to +// both [Transport] and [Server]. +type HTTP2Config struct { + // MaxConcurrentStreams optionally specifies the number of + // concurrent streams that a peer may have open at a time. + // If zero, MaxConcurrentStreams defaults to at least 100. + MaxConcurrentStreams int + + // MaxDecoderHeaderTableSize optionally specifies an upper limit for the + // size of the header compression table used for decoding headers sent + // by the peer. + // A valid value is less than 4MiB. + // If zero or invalid, a default value is used. + MaxDecoderHeaderTableSize int + + // MaxEncoderHeaderTableSize optionally specifies an upper limit for the + // header compression table used for sending headers to the peer. + // A valid value is less than 4MiB. + // If zero or invalid, a default value is used. + MaxEncoderHeaderTableSize int + + // MaxReadFrameSize optionally specifies the largest frame + // this endpoint is willing to read. + // A valid value is between 16KiB and 16MiB, inclusive. + // If zero or invalid, a default value is used. + MaxReadFrameSize int + + // MaxReceiveBufferPerConnection is the maximum size of the + // flow control window for data received on a connection. + // A valid value is at least 64KiB and less than 4MiB. + // If invalid, a default value is used. + MaxReceiveBufferPerConnection int + + // MaxReceiveBufferPerStream is the maximum size of + // the flow control window for data received on a stream (request). + // A valid value is less than 4MiB. + // If zero or invalid, a default value is used. + MaxReceiveBufferPerStream int + + // SendPingTimeout is the timeout after which a health check using a ping + // frame will be carried out if no frame is received on a connection. + // If zero, no health check is performed. + SendPingTimeout time.Duration + + // PingTimeout is the timeout after which a connection will be closed + // if a response to a ping is not received. + // If zero, a default of 15 seconds is used. + PingTimeout time.Duration + + // WriteByteTimeout is the timeout after which a connection will be + // closed if no data can be written to it. The timeout begins when data is + // available to write, and is extended whenever any bytes are written. + WriteByteTimeout time.Duration + + // PermitProhibitedCipherSuites, if true, permits the use of + // cipher suites prohibited by the HTTP/2 spec. + PermitProhibitedCipherSuites bool + + // CountError, if non-nil, is called on HTTP/2 errors. + // It is intended to increment a metric for monitoring. + // The errType contains only lowercase letters, digits, and underscores + // (a-z, 0-9, _). + CountError func(errType string) +} diff --git a/backend/vendor/github.com/enetx/http/httptrace/trace.go b/backend/vendor/github.com/enetx/http/httptrace/trace.go new file mode 100644 index 0000000..be8a255 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/httptrace/trace.go @@ -0,0 +1,256 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package httptrace provides mechanisms to trace the events within +// HTTP client requests. +package httptrace + +import ( + "context" + "crypto/tls" + "net" + "net/textproto" + "reflect" + "time" + + "github.com/enetx/http/internal/nettrace" +) + +// unique type to prevent assignment. +type clientEventContextKey struct{} + +// ContextClientTrace returns the [ClientTrace] associated with the +// provided context. If none, it returns nil. +func ContextClientTrace(ctx context.Context) *ClientTrace { + trace, _ := ctx.Value(clientEventContextKey{}).(*ClientTrace) + return trace +} + +// WithClientTrace returns a new context based on the provided parent +// ctx. HTTP client requests made with the returned context will use +// the provided trace hooks, in addition to any previous hooks +// registered with ctx. Any hooks defined in the provided trace will +// be called first. +func WithClientTrace(ctx context.Context, trace *ClientTrace) context.Context { + if trace == nil { + panic("nil trace") + } + old := ContextClientTrace(ctx) + trace.compose(old) + + ctx = context.WithValue(ctx, clientEventContextKey{}, trace) + if trace.hasNetHooks() { + nt := &nettrace.Trace{ + ConnectStart: trace.ConnectStart, + ConnectDone: trace.ConnectDone, + } + if trace.DNSStart != nil { + nt.DNSStart = func(name string) { + trace.DNSStart(DNSStartInfo{Host: name}) + } + } + if trace.DNSDone != nil { + nt.DNSDone = func(netIPs []any, coalesced bool, err error) { + addrs := make([]net.IPAddr, len(netIPs)) + for i, ip := range netIPs { + addrs[i] = ip.(net.IPAddr) + } + trace.DNSDone(DNSDoneInfo{ + Addrs: addrs, + Coalesced: coalesced, + Err: err, + }) + } + } + ctx = context.WithValue(ctx, nettrace.TraceKey{}, nt) + } + return ctx +} + +// ClientTrace is a set of hooks to run at various stages of an outgoing +// HTTP request. Any particular hook may be nil. Functions may be +// called concurrently from different goroutines and some may be called +// after the request has completed or failed. +// +// ClientTrace currently traces a single HTTP request & response +// during a single round trip and has no hooks that span a series +// of redirected requests. +// +// See https://blog.golang.org/http-tracing for more. +type ClientTrace struct { + // GetConn is called before a connection is created or + // retrieved from an idle pool. The hostPort is the + // "host:port" of the target or proxy. GetConn is called even + // if there's already an idle cached connection available. + GetConn func(hostPort string) + + // GotConn is called after a successful connection is + // obtained. There is no hook for failure to obtain a + // connection; instead, use the error from + // Transport.RoundTrip. + GotConn func(GotConnInfo) + + // PutIdleConn is called when the connection is returned to + // the idle pool. If err is nil, the connection was + // successfully returned to the idle pool. If err is non-nil, + // it describes why not. PutIdleConn is not called if + // connection reuse is disabled via Transport.DisableKeepAlives. + // PutIdleConn is called before the caller's Response.Body.Close + // call returns. + // For HTTP/2, this hook is not currently used. + PutIdleConn func(err error) + + // GotFirstResponseByte is called when the first byte of the response + // headers is available. + GotFirstResponseByte func() + + // Got100Continue is called if the server replies with a "100 + // Continue" response. + Got100Continue func() + + // Got1xxResponse is called for each 1xx informational response header + // returned before the final non-1xx response. Got1xxResponse is called + // for "100 Continue" responses, even if Got100Continue is also defined. + // If it returns an error, the client request is aborted with that error value. + Got1xxResponse func(code int, header textproto.MIMEHeader) error + + // DNSStart is called when a DNS lookup begins. + DNSStart func(DNSStartInfo) + + // DNSDone is called when a DNS lookup ends. + DNSDone func(DNSDoneInfo) + + // ConnectStart is called when a new connection's Dial begins. + // If net.Dialer.DualStack (IPv6 "Happy Eyeballs") support is + // enabled, this may be called multiple times. + ConnectStart func(network, addr string) + + // ConnectDone is called when a new connection's Dial + // completes. The provided err indicates whether the + // connection completed successfully. + // If net.Dialer.DualStack ("Happy Eyeballs") support is + // enabled, this may be called multiple times. + ConnectDone func(network, addr string, err error) + + // TLSHandshakeStart is called when the TLS handshake is started. When + // connecting to an HTTPS site via an HTTP proxy, the handshake happens + // after the CONNECT request is processed by the proxy. + TLSHandshakeStart func() + + // TLSHandshakeDone is called after the TLS handshake with either the + // successful handshake's connection state, or a non-nil error on handshake + // failure. + TLSHandshakeDone func(tls.ConnectionState, error) + + // WroteHeaderField is called after the Transport has written + // each request header. At the time of this call the values + // might be buffered and not yet written to the network. + WroteHeaderField func(key string, value []string) + + // WroteHeaders is called after the Transport has written + // all request headers. + WroteHeaders func() + + // Wait100Continue is called if the Request specified + // "Expect: 100-continue" and the Transport has written the + // request headers but is waiting for "100 Continue" from the + // server before writing the request body. + Wait100Continue func() + + // WroteRequest is called with the result of writing the + // request and any body. It may be called multiple times + // in the case of retried requests. + WroteRequest func(WroteRequestInfo) +} + +// WroteRequestInfo contains information provided to the WroteRequest +// hook. +type WroteRequestInfo struct { + // Err is any error encountered while writing the Request. + Err error +} + +// compose modifies t such that it respects the previously-registered hooks in old, +// subject to the composition policy requested in t.Compose. +func (t *ClientTrace) compose(old *ClientTrace) { + if old == nil { + return + } + tv := reflect.ValueOf(t).Elem() + ov := reflect.ValueOf(old).Elem() + structType := tv.Type() + for i := 0; i < structType.NumField(); i++ { + tf := tv.Field(i) + hookType := tf.Type() + if hookType.Kind() != reflect.Func { + continue + } + of := ov.Field(i) + if of.IsNil() { + continue + } + if tf.IsNil() { + tf.Set(of) + continue + } + + // Make a copy of tf for tf to call. (Otherwise it + // creates a recursive call cycle and stack overflows) + tfCopy := reflect.ValueOf(tf.Interface()) + + // We need to call both tf and of in some order. + newFunc := reflect.MakeFunc(hookType, func(args []reflect.Value) []reflect.Value { + tfCopy.Call(args) + return of.Call(args) + }) + tv.Field(i).Set(newFunc) + } +} + +// DNSStartInfo contains information about a DNS request. +type DNSStartInfo struct { + Host string +} + +// DNSDoneInfo contains information about the results of a DNS lookup. +type DNSDoneInfo struct { + // Addrs are the IPv4 and/or IPv6 addresses found in the DNS + // lookup. The contents of the slice should not be mutated. + Addrs []net.IPAddr + + // Err is any error that occurred during the DNS lookup. + Err error + + // Coalesced is whether the Addrs were shared with another + // caller who was doing the same DNS lookup concurrently. + Coalesced bool +} + +func (t *ClientTrace) hasNetHooks() bool { + if t == nil { + return false + } + return t.DNSStart != nil || t.DNSDone != nil || t.ConnectStart != nil || t.ConnectDone != nil +} + +// GotConnInfo is the argument to the [ClientTrace.GotConn] function and +// contains information about the obtained connection. +type GotConnInfo struct { + // Conn is the connection that was obtained. It is owned by + // the http.Transport and should not be read, written or + // closed by users of ClientTrace. + Conn net.Conn + + // Reused is whether this connection has been previously + // used for another HTTP request. + Reused bool + + // WasIdle is whether this connection was obtained from an + // idle pool. + WasIdle bool + + // IdleTime reports how long the connection was previously + // idle, if WasIdle is true. + IdleTime time.Duration +} diff --git a/backend/vendor/github.com/enetx/http/httputil/dump.go b/backend/vendor/github.com/enetx/http/httputil/dump.go new file mode 100644 index 0000000..bca3eb7 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/httputil/dump.go @@ -0,0 +1,338 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package httputil + +import ( + "bufio" + "bytes" + "errors" + "fmt" + "io" + "net" + "net/url" + "strings" + "time" + + "github.com/enetx/http" +) + +// drainBody reads all of b to memory and then returns two equivalent +// ReadClosers yielding the same bytes. +// +// It returns an error if the initial slurp of all bytes fails. It does not attempt +// to make the returned ReadClosers have identical error-matching behavior. +func drainBody(b io.ReadCloser) (r1, r2 io.ReadCloser, err error) { + if b == nil || b == http.NoBody { + // No copying needed. Preserve the magic sentinel meaning of NoBody. + return http.NoBody, http.NoBody, nil + } + var buf bytes.Buffer + if _, err = buf.ReadFrom(b); err != nil { + return nil, b, err + } + if err = b.Close(); err != nil { + return nil, b, err + } + return io.NopCloser(&buf), io.NopCloser(bytes.NewReader(buf.Bytes())), nil +} + +// dumpConn is a net.Conn which writes to Writer and reads from Reader +type dumpConn struct { + io.Writer + io.Reader +} + +func (c *dumpConn) Close() error { return nil } +func (c *dumpConn) LocalAddr() net.Addr { return nil } +func (c *dumpConn) RemoteAddr() net.Addr { return nil } +func (c *dumpConn) SetDeadline(t time.Time) error { return nil } +func (c *dumpConn) SetReadDeadline(t time.Time) error { return nil } +func (c *dumpConn) SetWriteDeadline(t time.Time) error { return nil } + +type neverEnding byte + +func (b neverEnding) Read(p []byte) (n int, err error) { + for i := range p { + p[i] = byte(b) + } + return len(p), nil +} + +// outgoingLength is a copy of the unexported +// (*http.Request).outgoingLength method. +func outgoingLength(req *http.Request) int64 { + if req.Body == nil || req.Body == http.NoBody { + return 0 + } + if req.ContentLength != 0 { + return req.ContentLength + } + return -1 +} + +// DumpRequestOut is like [DumpRequest] but for outgoing client requests. It +// includes any headers that the standard [http.Transport] adds, such as +// User-Agent. +func DumpRequestOut(req *http.Request, body bool) ([]byte, error) { + save := req.Body + dummyBody := false + if !body { + contentLength := outgoingLength(req) + if contentLength != 0 { + req.Body = io.NopCloser(io.LimitReader(neverEnding('x'), contentLength)) + dummyBody = true + } + } else { + var err error + save, req.Body, err = drainBody(req.Body) + if err != nil { + return nil, err + } + } + + // Since we're using the actual Transport code to write the request, + // switch to http so the Transport doesn't try to do an SSL + // negotiation with our dumpConn and its bytes.Buffer & pipe. + // The wire format for https and http are the same, anyway. + reqSend := req + if req.URL.Scheme == "https" { + reqSend = new(http.Request) + *reqSend = *req + reqSend.URL = new(url.URL) + *reqSend.URL = *req.URL + reqSend.URL.Scheme = "http" + } + + // Use the actual Transport code to record what we would send + // on the wire, but not using TCP. Use a Transport with a + // custom dialer that returns a fake net.Conn that waits + // for the full input (and recording it), and then responds + // with a dummy response. + var buf bytes.Buffer // records the output + pr, pw := io.Pipe() + defer pr.Close() + defer pw.Close() + dr := &delegateReader{c: make(chan io.Reader)} + + t := &http.Transport{ + Dial: func(net, addr string) (net.Conn, error) { + return &dumpConn{io.MultiWriter(&buf, pw), dr}, nil + }, + } + defer t.CloseIdleConnections() + + // We need this channel to ensure that the reader + // goroutine exits if t.RoundTrip returns an error. + // See golang.org/issue/32571. + quitReadCh := make(chan struct{}) + // Wait for the request before replying with a dummy response: + go func() { + req, err := http.ReadRequest(bufio.NewReader(pr)) + if err == nil { + // Ensure all the body is read; otherwise + // we'll get a partial dump. + io.Copy(io.Discard, req.Body) + req.Body.Close() + } + select { + case dr.c <- strings.NewReader("HTTP/1.1 204 No Content\r\nConnection: close\r\n\r\n"): + case <-quitReadCh: + // Ensure delegateReader.Read doesn't block forever if we get an error. + close(dr.c) + } + }() + + _, err := t.RoundTrip(reqSend) + + req.Body = save + if err != nil { + pw.Close() + dr.err = err + close(quitReadCh) + return nil, err + } + dump := buf.Bytes() + + // If we used a dummy body above, remove it now. + // TODO: if the req.ContentLength is large, we allocate memory + // unnecessarily just to slice it off here. But this is just + // a debug function, so this is acceptable for now. We could + // discard the body earlier if this matters. + if dummyBody { + if i := bytes.Index(dump, []byte("\r\n\r\n")); i >= 0 { + dump = dump[:i+4] + } + } + return dump, nil +} + +// delegateReader is a reader that delegates to another reader, +// once it arrives on a channel. +type delegateReader struct { + c chan io.Reader + err error // only used if r is nil and c is closed. + r io.Reader // nil until received from c +} + +func (r *delegateReader) Read(p []byte) (int, error) { + if r.r == nil { + var ok bool + if r.r, ok = <-r.c; !ok { + return 0, r.err + } + } + return r.r.Read(p) +} + +// Return value if nonempty, def otherwise. +func valueOrDefault(value, def string) string { + if value != "" { + return value + } + return def +} + +var reqWriteExcludeHeaderDump = map[string]bool{ + "Host": true, // not in Header map anyway + "Transfer-Encoding": true, + "Trailer": true, +} + +// DumpRequest returns the given request in its HTTP/1.x wire +// representation. It should only be used by servers to debug client +// requests. The returned representation is an approximation only; +// some details of the initial request are lost while parsing it into +// an [http.Request]. In particular, the order and case of header field +// names are lost. The order of values in multi-valued headers is kept +// intact. HTTP/2 requests are dumped in HTTP/1.x form, not in their +// original binary representations. +// +// If body is true, DumpRequest also returns the body. To do so, it +// consumes req.Body and then replaces it with a new [io.ReadCloser] +// that yields the same bytes. If DumpRequest returns an error, +// the state of req is undefined. +// +// The documentation for [http.Request.Write] details which fields +// of req are included in the dump. +func DumpRequest(req *http.Request, body bool) ([]byte, error) { + var err error + save := req.Body + if !body || req.Body == nil { + req.Body = nil + } else { + save, req.Body, err = drainBody(req.Body) + if err != nil { + return nil, err + } + } + + var b bytes.Buffer + + // By default, print out the unmodified req.RequestURI, which + // is always set for incoming server requests. But because we + // previously used req.URL.RequestURI and the docs weren't + // always so clear about when to use DumpRequest vs + // DumpRequestOut, fall back to the old way if the caller + // provides a non-server Request. + reqURI := req.RequestURI + if reqURI == "" { + reqURI = req.URL.RequestURI() + } + + fmt.Fprintf(&b, "%s %s HTTP/%d.%d\r\n", valueOrDefault(req.Method, "GET"), + reqURI, req.ProtoMajor, req.ProtoMinor) + + absRequestURI := strings.HasPrefix(req.RequestURI, "http://") || strings.HasPrefix(req.RequestURI, "https://") + if !absRequestURI { + host := req.Host + if host == "" && req.URL != nil { + host = req.URL.Host + } + if host != "" { + fmt.Fprintf(&b, "Host: %s\r\n", host) + } + } + + chunked := len(req.TransferEncoding) > 0 && req.TransferEncoding[0] == "chunked" + if len(req.TransferEncoding) > 0 { + fmt.Fprintf(&b, "Transfer-Encoding: %s\r\n", strings.Join(req.TransferEncoding, ",")) + } + + err = req.Header.WriteSubset(&b, reqWriteExcludeHeaderDump) + if err != nil { + return nil, err + } + + io.WriteString(&b, "\r\n") + + if req.Body != nil { + var dest io.Writer = &b + if chunked { + dest = NewChunkedWriter(dest) + } + _, err = io.Copy(dest, req.Body) + if chunked { + dest.(io.Closer).Close() + io.WriteString(&b, "\r\n") + } + } + + req.Body = save + if err != nil { + return nil, err + } + return b.Bytes(), nil +} + +// errNoBody is a sentinel error value used by failureToReadBody so we +// can detect that the lack of body was intentional. +var errNoBody = errors.New("sentinel error value") + +// failureToReadBody is an io.ReadCloser that just returns errNoBody on +// Read. It's swapped in when we don't actually want to consume +// the body, but need a non-nil one, and want to distinguish the +// error from reading the dummy body. +type failureToReadBody struct{} + +func (failureToReadBody) Read([]byte) (int, error) { return 0, errNoBody } +func (failureToReadBody) Close() error { return nil } + +// emptyBody is an instance of empty reader. +var emptyBody = io.NopCloser(strings.NewReader("")) + +// DumpResponse is like DumpRequest but dumps a response. +func DumpResponse(resp *http.Response, body bool) ([]byte, error) { + var b bytes.Buffer + var err error + save := resp.Body + savecl := resp.ContentLength + + if !body { + // For content length of zero. Make sure the body is an empty + // reader, instead of returning error through failureToReadBody{}. + if resp.ContentLength == 0 { + resp.Body = emptyBody + } else { + resp.Body = failureToReadBody{} + } + } else if resp.Body == nil { + resp.Body = emptyBody + } else { + save, resp.Body, err = drainBody(resp.Body) + if err != nil { + return nil, err + } + } + err = resp.Write(&b) + if err == errNoBody { + err = nil + } + resp.Body = save + resp.ContentLength = savecl + if err != nil { + return nil, err + } + return b.Bytes(), nil +} diff --git a/backend/vendor/github.com/enetx/http/httputil/httputil.go b/backend/vendor/github.com/enetx/http/httputil/httputil.go new file mode 100644 index 0000000..5740439 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/httputil/httputil.go @@ -0,0 +1,42 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package httputil provides HTTP utility functions, complementing the +// more common ones in the net/http package. +package httputil + +import ( + "io" + + "github.com/enetx/http/internal" +) + +// NewChunkedReader returns a new chunkedReader that translates the data read from r +// out of HTTP "chunked" format before returning it. +// The chunkedReader returns [io.EOF] when the final 0-length chunk is read. +// +// NewChunkedReader is not needed by normal applications. The http package +// automatically decodes chunking when reading response bodies. +func NewChunkedReader(r io.Reader) io.Reader { + return internal.NewChunkedReader(r) +} + +// NewChunkedWriter returns a new chunkedWriter that translates writes into HTTP +// "chunked" format before writing them to w. Closing the returned chunkedWriter +// sends the final 0-length chunk that marks the end of the stream but does +// not send the final CRLF that appears after trailers; trailers and the last +// CRLF must be written separately. +// +// NewChunkedWriter is not needed by normal applications. The http +// package adds chunking automatically if handlers don't set a +// Content-Length header. Using NewChunkedWriter inside a handler +// would result in double chunking or chunking with a Content-Length +// length, both of which are wrong. +func NewChunkedWriter(w io.Writer) io.WriteCloser { + return internal.NewChunkedWriter(w) +} + +// ErrLineTooLong is returned when reading malformed chunked data +// with lines that are too long. +var ErrLineTooLong = internal.ErrLineTooLong diff --git a/backend/vendor/github.com/enetx/http/httputil/persist.go b/backend/vendor/github.com/enetx/http/httputil/persist.go new file mode 100644 index 0000000..1a95c3b --- /dev/null +++ b/backend/vendor/github.com/enetx/http/httputil/persist.go @@ -0,0 +1,432 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package httputil + +import ( + "bufio" + "errors" + "io" + "net" + "net/textproto" + "sync" + + "github.com/enetx/http" +) + +var ( + // Deprecated: No longer used. + ErrPersistEOF = &http.ProtocolError{ErrorString: "persistent connection closed"} + + // Deprecated: No longer used. + ErrClosed = &http.ProtocolError{ErrorString: "connection closed by user"} + + // Deprecated: No longer used. + ErrPipeline = &http.ProtocolError{ErrorString: "pipeline error"} +) + +// This is an API usage error - the local side is closed. +// ErrPersistEOF (above) reports that the remote side is closed. +var errClosed = errors.New("i/o operation on closed connection") + +// ServerConn is an artifact of Go's early HTTP implementation. +// It is low-level, old, and unused by Go's current HTTP stack. +// We should have deleted it before Go 1. +// +// Deprecated: Use the Server in package [net/http] instead. +type ServerConn struct { + mu sync.Mutex // read-write protects the following fields + c net.Conn + r *bufio.Reader + re, we error // read/write errors + lastbody io.ReadCloser + nread, nwritten int + pipereq map[*http.Request]uint + + pipe textproto.Pipeline +} + +// NewServerConn is an artifact of Go's early HTTP implementation. +// It is low-level, old, and unused by Go's current HTTP stack. +// We should have deleted it before Go 1. +// +// Deprecated: Use the Server in package [net/http] instead. +func NewServerConn(c net.Conn, r *bufio.Reader) *ServerConn { + if r == nil { + r = bufio.NewReader(c) + } + return &ServerConn{c: c, r: r, pipereq: make(map[*http.Request]uint)} +} + +// Hijack detaches the [ServerConn] and returns the underlying connection as well +// as the read-side bufio which may have some left over data. Hijack may be +// called before Read has signaled the end of the keep-alive logic. The user +// should not call Hijack while [ServerConn.Read] or [ServerConn.Write] is in progress. +func (sc *ServerConn) Hijack() (net.Conn, *bufio.Reader) { + sc.mu.Lock() + defer sc.mu.Unlock() + c := sc.c + r := sc.r + sc.c = nil + sc.r = nil + return c, r +} + +// Close calls [ServerConn.Hijack] and then also closes the underlying connection. +func (sc *ServerConn) Close() error { + c, _ := sc.Hijack() + if c != nil { + return c.Close() + } + return nil +} + +// Read returns the next request on the wire. An [ErrPersistEOF] is returned if +// it is gracefully determined that there are no more requests (e.g. after the +// first request on an HTTP/1.0 connection, or after a Connection:close on a +// HTTP/1.1 connection). +func (sc *ServerConn) Read() (*http.Request, error) { + var req *http.Request + var err error + + // Ensure ordered execution of Reads and Writes + id := sc.pipe.Next() + sc.pipe.StartRequest(id) + defer func() { + sc.pipe.EndRequest(id) + if req == nil { + sc.pipe.StartResponse(id) + sc.pipe.EndResponse(id) + } else { + // Remember the pipeline id of this request + sc.mu.Lock() + sc.pipereq[req] = id + sc.mu.Unlock() + } + }() + + sc.mu.Lock() + if sc.we != nil { // no point receiving if write-side broken or closed + defer sc.mu.Unlock() + return nil, sc.we + } + if sc.re != nil { + defer sc.mu.Unlock() + return nil, sc.re + } + if sc.r == nil { // connection closed by user in the meantime + defer sc.mu.Unlock() + return nil, errClosed + } + r := sc.r + lastbody := sc.lastbody + sc.lastbody = nil + sc.mu.Unlock() + + // Make sure body is fully consumed, even if user does not call body.Close + if lastbody != nil { + // body.Close is assumed to be idempotent and multiple calls to + // it should return the error that its first invocation + // returned. + err = lastbody.Close() + if err != nil { + sc.mu.Lock() + defer sc.mu.Unlock() + sc.re = err + return nil, err + } + } + + req, err = http.ReadRequest(r) + sc.mu.Lock() + defer sc.mu.Unlock() + if err != nil { + if err == io.ErrUnexpectedEOF { + // A close from the opposing client is treated as a + // graceful close, even if there was some unparse-able + // data before the close. + sc.re = ErrPersistEOF + return nil, sc.re + } else { + sc.re = err + return req, err + } + } + sc.lastbody = req.Body + sc.nread++ + if req.Close { + sc.re = ErrPersistEOF + return req, sc.re + } + return req, err +} + +// Pending returns the number of unanswered requests +// that have been received on the connection. +func (sc *ServerConn) Pending() int { + sc.mu.Lock() + defer sc.mu.Unlock() + return sc.nread - sc.nwritten +} + +// Write writes resp in response to req. To close the connection gracefully, set the +// Response.Close field to true. Write should be considered operational until +// it returns an error, regardless of any errors returned on the [ServerConn.Read] side. +func (sc *ServerConn) Write(req *http.Request, resp *http.Response) error { + + // Retrieve the pipeline ID of this request/response pair + sc.mu.Lock() + id, ok := sc.pipereq[req] + delete(sc.pipereq, req) + if !ok { + sc.mu.Unlock() + return ErrPipeline + } + sc.mu.Unlock() + + // Ensure pipeline order + sc.pipe.StartResponse(id) + defer sc.pipe.EndResponse(id) + + sc.mu.Lock() + if sc.we != nil { + defer sc.mu.Unlock() + return sc.we + } + if sc.c == nil { // connection closed by user in the meantime + defer sc.mu.Unlock() + return ErrClosed + } + c := sc.c + if sc.nread <= sc.nwritten { + defer sc.mu.Unlock() + return errors.New("persist server pipe count") + } + if resp.Close { + // After signaling a keep-alive close, any pipelined unread + // requests will be lost. It is up to the user to drain them + // before signaling. + sc.re = ErrPersistEOF + } + sc.mu.Unlock() + + err := resp.Write(c) + sc.mu.Lock() + defer sc.mu.Unlock() + if err != nil { + sc.we = err + return err + } + sc.nwritten++ + + return nil +} + +// ClientConn is an artifact of Go's early HTTP implementation. +// It is low-level, old, and unused by Go's current HTTP stack. +// We should have deleted it before Go 1. +// +// Deprecated: Use Client or Transport in package [net/http] instead. +type ClientConn struct { + mu sync.Mutex // read-write protects the following fields + c net.Conn + r *bufio.Reader + re, we error // read/write errors + lastbody io.ReadCloser + nread, nwritten int + pipereq map[*http.Request]uint + + pipe textproto.Pipeline + writeReq func(*http.Request, io.Writer) error +} + +// NewClientConn is an artifact of Go's early HTTP implementation. +// It is low-level, old, and unused by Go's current HTTP stack. +// We should have deleted it before Go 1. +// +// Deprecated: Use the Client or Transport in package [net/http] instead. +func NewClientConn(c net.Conn, r *bufio.Reader) *ClientConn { + if r == nil { + r = bufio.NewReader(c) + } + return &ClientConn{ + c: c, + r: r, + pipereq: make(map[*http.Request]uint), + writeReq: (*http.Request).Write, + } +} + +// NewProxyClientConn is an artifact of Go's early HTTP implementation. +// It is low-level, old, and unused by Go's current HTTP stack. +// We should have deleted it before Go 1. +// +// Deprecated: Use the Client or Transport in package [net/http] instead. +func NewProxyClientConn(c net.Conn, r *bufio.Reader) *ClientConn { + cc := NewClientConn(c, r) + cc.writeReq = (*http.Request).WriteProxy + return cc +} + +// Hijack detaches the [ClientConn] and returns the underlying connection as well +// as the read-side bufio which may have some left over data. Hijack may be +// called before the user or Read have signaled the end of the keep-alive +// logic. The user should not call Hijack while [ClientConn.Read] or ClientConn.Write is in progress. +func (cc *ClientConn) Hijack() (c net.Conn, r *bufio.Reader) { + cc.mu.Lock() + defer cc.mu.Unlock() + c = cc.c + r = cc.r + cc.c = nil + cc.r = nil + return +} + +// Close calls [ClientConn.Hijack] and then also closes the underlying connection. +func (cc *ClientConn) Close() error { + c, _ := cc.Hijack() + if c != nil { + return c.Close() + } + return nil +} + +// Write writes a request. An [ErrPersistEOF] error is returned if the connection +// has been closed in an HTTP keep-alive sense. If req.Close equals true, the +// keep-alive connection is logically closed after this request and the opposing +// server is informed. An ErrUnexpectedEOF indicates the remote closed the +// underlying TCP connection, which is usually considered as graceful close. +func (cc *ClientConn) Write(req *http.Request) error { + var err error + + // Ensure ordered execution of Writes + id := cc.pipe.Next() + cc.pipe.StartRequest(id) + defer func() { + cc.pipe.EndRequest(id) + if err != nil { + cc.pipe.StartResponse(id) + cc.pipe.EndResponse(id) + } else { + // Remember the pipeline id of this request + cc.mu.Lock() + cc.pipereq[req] = id + cc.mu.Unlock() + } + }() + + cc.mu.Lock() + if cc.re != nil { // no point sending if read-side closed or broken + defer cc.mu.Unlock() + return cc.re + } + if cc.we != nil { + defer cc.mu.Unlock() + return cc.we + } + if cc.c == nil { // connection closed by user in the meantime + defer cc.mu.Unlock() + return errClosed + } + c := cc.c + if req.Close { + // We write the EOF to the write-side error, because there + // still might be some pipelined reads + cc.we = ErrPersistEOF + } + cc.mu.Unlock() + + err = cc.writeReq(req, c) + cc.mu.Lock() + defer cc.mu.Unlock() + if err != nil { + cc.we = err + return err + } + cc.nwritten++ + + return nil +} + +// Pending returns the number of unanswered requests +// that have been sent on the connection. +func (cc *ClientConn) Pending() int { + cc.mu.Lock() + defer cc.mu.Unlock() + return cc.nwritten - cc.nread +} + +// Read reads the next response from the wire. A valid response might be +// returned together with an [ErrPersistEOF], which means that the remote +// requested that this be the last request serviced. Read can be called +// concurrently with [ClientConn.Write], but not with another Read. +func (cc *ClientConn) Read(req *http.Request) (resp *http.Response, err error) { + // Retrieve the pipeline ID of this request/response pair + cc.mu.Lock() + id, ok := cc.pipereq[req] + delete(cc.pipereq, req) + if !ok { + cc.mu.Unlock() + return nil, ErrPipeline + } + cc.mu.Unlock() + + // Ensure pipeline order + cc.pipe.StartResponse(id) + defer cc.pipe.EndResponse(id) + + cc.mu.Lock() + if cc.re != nil { + defer cc.mu.Unlock() + return nil, cc.re + } + if cc.r == nil { // connection closed by user in the meantime + defer cc.mu.Unlock() + return nil, errClosed + } + r := cc.r + lastbody := cc.lastbody + cc.lastbody = nil + cc.mu.Unlock() + + // Make sure body is fully consumed, even if user does not call body.Close + if lastbody != nil { + // body.Close is assumed to be idempotent and multiple calls to + // it should return the error that its first invocation + // returned. + err = lastbody.Close() + if err != nil { + cc.mu.Lock() + defer cc.mu.Unlock() + cc.re = err + return nil, err + } + } + + resp, err = http.ReadResponse(r, req) + cc.mu.Lock() + defer cc.mu.Unlock() + if err != nil { + cc.re = err + return resp, err + } + cc.lastbody = resp.Body + + cc.nread++ + + if resp.Close { + cc.re = ErrPersistEOF // don't send any more requests + return resp, cc.re + } + return resp, err +} + +// Do is convenience method that writes a request and reads a response. +func (cc *ClientConn) Do(req *http.Request) (*http.Response, error) { + err := cc.Write(req) + if err != nil { + return nil, err + } + return cc.Read(req) +} diff --git a/backend/vendor/github.com/enetx/http/httputil/reverseproxy.go b/backend/vendor/github.com/enetx/http/httputil/reverseproxy.go new file mode 100644 index 0000000..73a19e7 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/httputil/reverseproxy.go @@ -0,0 +1,888 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// HTTP reverse proxy handler + +package httputil + +import ( + "context" + "errors" + "fmt" + "io" + "log" + "mime" + "net" + "net/textproto" + "net/url" + "strings" + "sync" + "time" + + "github.com/enetx/http" + "github.com/enetx/http/httptrace" + "github.com/enetx/http/internal/ascii" + + "golang.org/x/net/http/httpguts" +) + +// A ProxyRequest contains a request to be rewritten by a [ReverseProxy]. +type ProxyRequest struct { + // In is the request received by the proxy. + // The Rewrite function must not modify In. + In *http.Request + + // Out is the request which will be sent by the proxy. + // The Rewrite function may modify or replace this request. + // Hop-by-hop headers are removed from this request + // before Rewrite is called. + Out *http.Request +} + +// SetURL routes the outbound request to the scheme, host, and base path +// provided in target. If the target's path is "/base" and the incoming +// request was for "/dir", the target request will be for "/base/dir". +// To route requests without joining the incoming path, +// set r.Out.URL directly. +// +// SetURL rewrites the outbound Host header to match the target's host. +// To preserve the inbound request's Host header (the default behavior +// of [NewSingleHostReverseProxy]): +// +// rewriteFunc := func(r *httputil.ProxyRequest) { +// r.SetURL(url) +// r.Out.Host = r.In.Host +// } +func (r *ProxyRequest) SetURL(target *url.URL) { + rewriteRequestURL(r.Out, target) + r.Out.Host = "" +} + +// SetXForwarded sets the X-Forwarded-For, X-Forwarded-Host, and +// X-Forwarded-Proto headers of the outbound request. +// +// - The X-Forwarded-For header is set to the client IP address. +// - The X-Forwarded-Host header is set to the host name requested +// by the client. +// - The X-Forwarded-Proto header is set to "http" or "https", depending +// on whether the inbound request was made on a TLS-enabled connection. +// +// If the outbound request contains an existing X-Forwarded-For header, +// SetXForwarded appends the client IP address to it. To append to the +// inbound request's X-Forwarded-For header (the default behavior of +// [ReverseProxy] when using a Director function), copy the header +// from the inbound request before calling SetXForwarded: +// +// rewriteFunc := func(r *httputil.ProxyRequest) { +// r.Out.Header["X-Forwarded-For"] = r.In.Header["X-Forwarded-For"] +// r.SetXForwarded() +// } +func (r *ProxyRequest) SetXForwarded() { + clientIP, _, err := net.SplitHostPort(r.In.RemoteAddr) + if err == nil { + prior := r.Out.Header["X-Forwarded-For"] + if len(prior) > 0 { + clientIP = strings.Join(prior, ", ") + ", " + clientIP + } + r.Out.Header.Set("X-Forwarded-For", clientIP) + } else { + r.Out.Header.Del("X-Forwarded-For") + } + r.Out.Header.Set("X-Forwarded-Host", r.In.Host) + if r.In.TLS == nil { + r.Out.Header.Set("X-Forwarded-Proto", "http") + } else { + r.Out.Header.Set("X-Forwarded-Proto", "https") + } +} + +// ReverseProxy is an HTTP Handler that takes an incoming request and +// sends it to another server, proxying the response back to the +// client. +// +// 1xx responses are forwarded to the client if the underlying +// transport supports ClientTrace.Got1xxResponse. +// +// Hop-by-hop headers (see RFC 9110, section 7.6.1), including +// Connection, Proxy-Connection, Keep-Alive, Proxy-Authenticate, +// Proxy-Authorization, TE, Trailer, Transfer-Encoding, and Upgrade, +// are removed from client requests and backend responses. +// The Rewrite function may be used to add hop-by-hop headers to the request, +// and the ModifyResponse function may be used to remove them from the response. +type ReverseProxy struct { + // Rewrite must be a function which modifies + // the request into a new request to be sent + // using Transport. Its response is then copied + // back to the original client unmodified. + // Rewrite must not access the provided ProxyRequest + // or its contents after returning. + // + // The Forwarded, X-Forwarded, X-Forwarded-Host, + // and X-Forwarded-Proto headers are removed from the + // outbound request before Rewrite is called. See also + // the ProxyRequest.SetXForwarded method. + // + // Unparsable query parameters are removed from the + // outbound request before Rewrite is called. + // The Rewrite function may copy the inbound URL's + // RawQuery to the outbound URL to preserve the original + // parameter string. Note that this can lead to security + // issues if the proxy's interpretation of query parameters + // does not match that of the downstream server. + // + // At most one of Rewrite or Director may be set. + Rewrite func(*ProxyRequest) + + // Director is a function which modifies + // the request into a new request to be sent + // using Transport. Its response is then copied + // back to the original client unmodified. + // Director must not access the provided Request + // after returning. + // + // By default, the X-Forwarded-For header is set to the + // value of the client IP address. If an X-Forwarded-For + // header already exists, the client IP is appended to the + // existing values. As a special case, if the header + // exists in the Request.Header map but has a nil value + // (such as when set by the Director func), the X-Forwarded-For + // header is not modified. + // + // To prevent IP spoofing, be sure to delete any pre-existing + // X-Forwarded-For header coming from the client or + // an untrusted proxy. + // + // Hop-by-hop headers are removed from the request after + // Director returns, which can remove headers added by + // Director. Use a Rewrite function instead to ensure + // modifications to the request are preserved. + // + // Unparsable query parameters are removed from the outbound + // request if Request.Form is set after Director returns. + // + // At most one of Rewrite or Director may be set. + Director func(*http.Request) + + // The transport used to perform proxy requests. + // If nil, http.DefaultTransport is used. + Transport http.RoundTripper + + // FlushInterval specifies the flush interval + // to flush to the client while copying the + // response body. + // If zero, no periodic flushing is done. + // A negative value means to flush immediately + // after each write to the client. + // The FlushInterval is ignored when ReverseProxy + // recognizes a response as a streaming response, or + // if its ContentLength is -1; for such responses, writes + // are flushed to the client immediately. + FlushInterval time.Duration + + // ErrorLog specifies an optional logger for errors + // that occur when attempting to proxy the request. + // If nil, logging is done via the log package's standard logger. + ErrorLog *log.Logger + + // BufferPool optionally specifies a buffer pool to + // get byte slices for use by io.CopyBuffer when + // copying HTTP response bodies. + BufferPool BufferPool + + // ModifyResponse is an optional function that modifies the + // Response from the backend. It is called if the backend + // returns a response at all, with any HTTP status code. + // If the backend is unreachable, the optional ErrorHandler is + // called without any call to ModifyResponse. + // + // Hop-by-hop headers are removed from the response before + // calling ModifyResponse. ModifyResponse may need to remove + // additional headers to fit its deployment model, such as Alt-Svc. + // + // If ModifyResponse returns an error, ErrorHandler is called + // with its error value. If ErrorHandler is nil, its default + // implementation is used. + ModifyResponse func(*http.Response) error + + // ErrorHandler is an optional function that handles errors + // reaching the backend or errors from ModifyResponse. + // + // If nil, the default is to log the provided error and return + // a 502 Status Bad Gateway response. + ErrorHandler func(http.ResponseWriter, *http.Request, error) +} + +// A BufferPool is an interface for getting and returning temporary +// byte slices for use by [io.CopyBuffer]. +type BufferPool interface { + Get() []byte + Put([]byte) +} + +func singleJoiningSlash(a, b string) string { + aslash := strings.HasSuffix(a, "/") + bslash := strings.HasPrefix(b, "/") + switch { + case aslash && bslash: + return a + b[1:] + case !aslash && !bslash: + return a + "/" + b + } + return a + b +} + +func joinURLPath(a, b *url.URL) (path, rawpath string) { + if a.RawPath == "" && b.RawPath == "" { + return singleJoiningSlash(a.Path, b.Path), "" + } + // Same as singleJoiningSlash, but uses EscapedPath to determine + // whether a slash should be added + apath := a.EscapedPath() + bpath := b.EscapedPath() + + aslash := strings.HasSuffix(apath, "/") + bslash := strings.HasPrefix(bpath, "/") + + switch { + case aslash && bslash: + return a.Path + b.Path[1:], apath + bpath[1:] + case !aslash && !bslash: + return a.Path + "/" + b.Path, apath + "/" + bpath + } + return a.Path + b.Path, apath + bpath +} + +// NewSingleHostReverseProxy returns a new [ReverseProxy] that routes +// URLs to the scheme, host, and base path provided in target. If the +// target's path is "/base" and the incoming request was for "/dir", +// the target request will be for /base/dir. +// +// NewSingleHostReverseProxy does not rewrite the Host header. +// +// To customize the ReverseProxy behavior beyond what +// NewSingleHostReverseProxy provides, use ReverseProxy directly +// with a Rewrite function. The ProxyRequest SetURL method +// may be used to route the outbound request. (Note that SetURL, +// unlike NewSingleHostReverseProxy, rewrites the Host header +// of the outbound request by default.) +// +// proxy := &ReverseProxy{ +// Rewrite: func(r *ProxyRequest) { +// r.SetURL(target) +// r.Out.Host = r.In.Host // if desired +// }, +// } +func NewSingleHostReverseProxy(target *url.URL) *ReverseProxy { + director := func(req *http.Request) { + rewriteRequestURL(req, target) + } + return &ReverseProxy{Director: director} +} + +func rewriteRequestURL(req *http.Request, target *url.URL) { + targetQuery := target.RawQuery + req.URL.Scheme = target.Scheme + req.URL.Host = target.Host + req.URL.Path, req.URL.RawPath = joinURLPath(target, req.URL) + if targetQuery == "" || req.URL.RawQuery == "" { + req.URL.RawQuery = targetQuery + req.URL.RawQuery + } else { + req.URL.RawQuery = targetQuery + "&" + req.URL.RawQuery + } +} + +func copyHeader(dst, src http.Header) { + for k, vv := range src { + for _, v := range vv { + dst.Add(k, v) + } + } +} + +// Hop-by-hop headers. These are removed when sent to the backend. +// As of RFC 7230, hop-by-hop headers are required to appear in the +// Connection header field. These are the headers defined by the +// obsoleted RFC 2616 (section 13.5.1) and are used for backward +// compatibility. +var hopHeaders = []string{ + "Connection", + "Proxy-Connection", // non-standard but still sent by libcurl and rejected by e.g. google + "Keep-Alive", + "Proxy-Authenticate", + "Proxy-Authorization", + "Te", // canonicalized version of "TE" + "Trailer", // not Trailers per URL above; https://www.rfc-editor.org/errata_search.php?eid=4522 + "Transfer-Encoding", + "Upgrade", +} + +func (p *ReverseProxy) defaultErrorHandler(rw http.ResponseWriter, req *http.Request, err error) { + p.logf("http: proxy error: %v", err) + rw.WriteHeader(http.StatusBadGateway) +} + +func (p *ReverseProxy) getErrorHandler() func(http.ResponseWriter, *http.Request, error) { + if p.ErrorHandler != nil { + return p.ErrorHandler + } + return p.defaultErrorHandler +} + +// modifyResponse conditionally runs the optional ModifyResponse hook +// and reports whether the request should proceed. +func (p *ReverseProxy) modifyResponse(rw http.ResponseWriter, res *http.Response, req *http.Request) bool { + if p.ModifyResponse == nil { + return true + } + if err := p.ModifyResponse(res); err != nil { + res.Body.Close() + p.getErrorHandler()(rw, req, err) + return false + } + return true +} + +func (p *ReverseProxy) ServeHTTP(rw http.ResponseWriter, req *http.Request) { + transport := p.Transport + if transport == nil { + transport = http.DefaultTransport + } + + ctx := req.Context() + if ctx.Done() != nil { + // CloseNotifier predates context.Context, and has been + // entirely superseded by it. If the request contains + // a Context that carries a cancellation signal, don't + // bother spinning up a goroutine to watch the CloseNotify + // channel (if any). + // + // If the request Context has a nil Done channel (which + // means it is either context.Background, or a custom + // Context implementation with no cancellation signal), + // then consult the CloseNotifier if available. + } else if cn, ok := rw.(http.CloseNotifier); ok { + var cancel context.CancelFunc + ctx, cancel = context.WithCancel(ctx) + defer cancel() + notifyChan := cn.CloseNotify() + go func() { + select { + case <-notifyChan: + cancel() + case <-ctx.Done(): + } + }() + } + + outreq := req.Clone(ctx) + if req.ContentLength == 0 { + outreq.Body = nil // Issue 16036: nil Body for http.Transport retries + } + if outreq.Body != nil { + // Reading from the request body after returning from a handler is not + // allowed, and the RoundTrip goroutine that reads the Body can outlive + // this handler. This can lead to a crash if the handler panics (see + // Issue 46866). Although calling Close doesn't guarantee there isn't + // any Read in flight after the handle returns, in practice it's safe to + // read after closing it. + defer outreq.Body.Close() + } + if outreq.Header == nil { + outreq.Header = make(http.Header) // Issue 33142: historical behavior was to always allocate + } + + if (p.Director != nil) == (p.Rewrite != nil) { + p.getErrorHandler()(rw, req, errors.New("ReverseProxy must have exactly one of Director or Rewrite set")) + return + } + + if p.Director != nil { + p.Director(outreq) + if outreq.Form != nil { + outreq.URL.RawQuery = cleanQueryParams(outreq.URL.RawQuery) + } + } + outreq.Close = false + + reqUpType := upgradeType(outreq.Header) + if !ascii.IsPrint(reqUpType) { + p.getErrorHandler()(rw, req, fmt.Errorf("client tried to switch to invalid protocol %q", reqUpType)) + return + } + removeHopByHopHeaders(outreq.Header) + + // Issue 21096: tell backend applications that care about trailer support + // that we support trailers. (We do, but we don't go out of our way to + // advertise that unless the incoming client request thought it was worth + // mentioning.) Note that we look at req.Header, not outreq.Header, since + // the latter has passed through removeHopByHopHeaders. + if httpguts.HeaderValuesContainsToken(req.Header["Te"], "trailers") { + outreq.Header.Set("Te", "trailers") + } + + // After stripping all the hop-by-hop connection headers above, add back any + // necessary for protocol upgrades, such as for websockets. + if reqUpType != "" { + outreq.Header.Set("Connection", "Upgrade") + outreq.Header.Set("Upgrade", reqUpType) + } + + if p.Rewrite != nil { + // Strip client-provided forwarding headers. + // The Rewrite func may use SetXForwarded to set new values + // for these or copy the previous values from the inbound request. + outreq.Header.Del("Forwarded") + outreq.Header.Del("X-Forwarded-For") + outreq.Header.Del("X-Forwarded-Host") + outreq.Header.Del("X-Forwarded-Proto") + + // Remove unparsable query parameters from the outbound request. + outreq.URL.RawQuery = cleanQueryParams(outreq.URL.RawQuery) + + pr := &ProxyRequest{ + In: req, + Out: outreq, + } + p.Rewrite(pr) + outreq = pr.Out + } else { + if clientIP, _, err := net.SplitHostPort(req.RemoteAddr); err == nil { + // If we aren't the first proxy retain prior + // X-Forwarded-For information as a comma+space + // separated list and fold multiple headers into one. + prior, ok := outreq.Header["X-Forwarded-For"] + omit := ok && prior == nil // Issue 38079: nil now means don't populate the header + if len(prior) > 0 { + clientIP = strings.Join(prior, ", ") + ", " + clientIP + } + if !omit { + outreq.Header.Set("X-Forwarded-For", clientIP) + } + } + } + + if _, ok := outreq.Header["User-Agent"]; !ok { + // If the outbound request doesn't have a User-Agent header set, + // don't send the default Go HTTP client User-Agent. + outreq.Header.Set("User-Agent", "") + } + + var ( + roundTripMutex sync.Mutex + roundTripDone bool + ) + trace := &httptrace.ClientTrace{ + Got1xxResponse: func(code int, header textproto.MIMEHeader) error { + roundTripMutex.Lock() + defer roundTripMutex.Unlock() + if roundTripDone { + // If RoundTrip has returned, don't try to further modify + // the ResponseWriter's header map. + return nil + } + h := rw.Header() + copyHeader(h, http.Header(header)) + rw.WriteHeader(code) + + // Clear headers, it's not automatically done by ResponseWriter.WriteHeader() for 1xx responses + clear(h) + return nil + }, + } + outreq = outreq.WithContext(httptrace.WithClientTrace(outreq.Context(), trace)) + + res, err := transport.RoundTrip(outreq) + roundTripMutex.Lock() + roundTripDone = true + roundTripMutex.Unlock() + if err != nil { + p.getErrorHandler()(rw, outreq, err) + return + } + + // Deal with 101 Switching Protocols responses: (WebSocket, h2c, etc) + if res.StatusCode == http.StatusSwitchingProtocols { + if !p.modifyResponse(rw, res, outreq) { + return + } + p.handleUpgradeResponse(rw, outreq, res) + return + } + + removeHopByHopHeaders(res.Header) + + if !p.modifyResponse(rw, res, outreq) { + return + } + + copyHeader(rw.Header(), res.Header) + + // The "Trailer" header isn't included in the Transport's response, + // at least for *http.Transport. Build it up from Trailer. + announcedTrailers := len(res.Trailer) + if announcedTrailers > 0 { + trailerKeys := make([]string, 0, len(res.Trailer)) + for k := range res.Trailer { + trailerKeys = append(trailerKeys, k) + } + rw.Header().Add("Trailer", strings.Join(trailerKeys, ", ")) + } + + rw.WriteHeader(res.StatusCode) + + err = p.copyResponse(rw, res.Body, p.flushInterval(res)) + if err != nil { + defer res.Body.Close() + // Since we're streaming the response, if we run into an error all we can do + // is abort the request. Issue 23643: ReverseProxy should use ErrAbortHandler + // on read error while copying body. + if !shouldPanicOnCopyError(req) { + p.logf("suppressing panic for copyResponse error in test; copy error: %v", err) + return + } + panic(http.ErrAbortHandler) + } + res.Body.Close() // close now, instead of defer, to populate res.Trailer + + if len(res.Trailer) > 0 { + // Force chunking if we saw a response trailer. + // This prevents net/http from calculating the length for short + // bodies and adding a Content-Length. + http.NewResponseController(rw).Flush() + } + + if len(res.Trailer) == announcedTrailers { + copyHeader(rw.Header(), res.Trailer) + return + } + + for k, vv := range res.Trailer { + k = http.TrailerPrefix + k + for _, v := range vv { + rw.Header().Add(k, v) + } + } +} + +var inOurTests bool // whether we're in our own tests + +// shouldPanicOnCopyError reports whether the reverse proxy should +// panic with http.ErrAbortHandler. This is the right thing to do by +// default, but Go 1.10 and earlier did not, so existing unit tests +// weren't expecting panics. Only panic in our own tests, or when +// running under the HTTP server. +func shouldPanicOnCopyError(req *http.Request) bool { + if inOurTests { + // Our tests know to handle this panic. + return true + } + if req.Context().Value(http.ServerContextKey) != nil { + // We seem to be running under an HTTP server, so + // it'll recover the panic. + return true + } + // Otherwise act like Go 1.10 and earlier to not break + // existing tests. + return false +} + +// removeHopByHopHeaders removes hop-by-hop headers. +func removeHopByHopHeaders(h http.Header) { + // RFC 7230, section 6.1: Remove headers listed in the "Connection" header. + for _, f := range h["Connection"] { + for sf := range strings.SplitSeq(f, ",") { + if sf = textproto.TrimString(sf); sf != "" { + h.Del(sf) + } + } + } + // RFC 2616, section 13.5.1: Remove a set of known hop-by-hop headers. + // This behavior is superseded by the RFC 7230 Connection header, but + // preserve it for backwards compatibility. + for _, f := range hopHeaders { + h.Del(f) + } +} + +// flushInterval returns the p.FlushInterval value, conditionally +// overriding its value for a specific request/response. +func (p *ReverseProxy) flushInterval(res *http.Response) time.Duration { + resCT := res.Header.Get("Content-Type") + + // For Server-Sent Events responses, flush immediately. + // The MIME type is defined in https://www.w3.org/TR/eventsource/#text-event-stream + if baseCT, _, _ := mime.ParseMediaType(resCT); baseCT == "text/event-stream" { + return -1 // negative means immediately + } + + // We might have the case of streaming for which Content-Length might be unset. + if res.ContentLength == -1 { + return -1 + } + + return p.FlushInterval +} + +func (p *ReverseProxy) copyResponse(dst http.ResponseWriter, src io.Reader, flushInterval time.Duration) error { + var w io.Writer = dst + + if flushInterval != 0 { + mlw := &maxLatencyWriter{ + dst: dst, + flush: http.NewResponseController(dst).Flush, + latency: flushInterval, + } + defer mlw.stop() + + // set up initial timer so headers get flushed even if body writes are delayed + mlw.flushPending = true + mlw.t = time.AfterFunc(flushInterval, mlw.delayedFlush) + + w = mlw + } + + var buf []byte + if p.BufferPool != nil { + buf = p.BufferPool.Get() + defer p.BufferPool.Put(buf) + } + _, err := p.copyBuffer(w, src, buf) + return err +} + +// copyBuffer returns any write errors or non-EOF read errors, and the amount +// of bytes written. +func (p *ReverseProxy) copyBuffer(dst io.Writer, src io.Reader, buf []byte) (int64, error) { + if len(buf) == 0 { + buf = make([]byte, 32*1024) + } + var written int64 + for { + nr, rerr := src.Read(buf) + if rerr != nil && rerr != io.EOF && rerr != context.Canceled { + p.logf("httputil: ReverseProxy read error during body copy: %v", rerr) + } + if nr > 0 { + nw, werr := dst.Write(buf[:nr]) + if nw > 0 { + written += int64(nw) + } + if werr != nil { + return written, werr + } + if nr != nw { + return written, io.ErrShortWrite + } + } + if rerr != nil { + if rerr == io.EOF { + rerr = nil + } + return written, rerr + } + } +} + +func (p *ReverseProxy) logf(format string, args ...any) { + if p.ErrorLog != nil { + p.ErrorLog.Printf(format, args...) + } else { + log.Printf(format, args...) + } +} + +type maxLatencyWriter struct { + dst io.Writer + flush func() error + latency time.Duration // non-zero; negative means to flush immediately + + mu sync.Mutex // protects t, flushPending, and dst.Flush + t *time.Timer + flushPending bool +} + +func (m *maxLatencyWriter) Write(p []byte) (n int, err error) { + m.mu.Lock() + defer m.mu.Unlock() + n, err = m.dst.Write(p) + if m.latency < 0 { + m.flush() + return + } + if m.flushPending { + return + } + if m.t == nil { + m.t = time.AfterFunc(m.latency, m.delayedFlush) + } else { + m.t.Reset(m.latency) + } + m.flushPending = true + return +} + +func (m *maxLatencyWriter) delayedFlush() { + m.mu.Lock() + defer m.mu.Unlock() + if !m.flushPending { // if stop was called but AfterFunc already started this goroutine + return + } + m.flush() + m.flushPending = false +} + +func (m *maxLatencyWriter) stop() { + m.mu.Lock() + defer m.mu.Unlock() + m.flushPending = false + if m.t != nil { + m.t.Stop() + } +} + +func upgradeType(h http.Header) string { + if !httpguts.HeaderValuesContainsToken(h["Connection"], "Upgrade") { + return "" + } + return h.Get("Upgrade") +} + +func (p *ReverseProxy) handleUpgradeResponse(rw http.ResponseWriter, req *http.Request, res *http.Response) { + reqUpType := upgradeType(req.Header) + resUpType := upgradeType(res.Header) + if !ascii.IsPrint(resUpType) { // We know reqUpType is ASCII, it's checked by the caller. + p.getErrorHandler()(rw, req, fmt.Errorf("backend tried to switch to invalid protocol %q", resUpType)) + return + } + if !ascii.EqualFold(reqUpType, resUpType) { + p.getErrorHandler()(rw, req, fmt.Errorf("backend tried to switch protocol %q when %q was requested", resUpType, reqUpType)) + return + } + + backConn, ok := res.Body.(io.ReadWriteCloser) + if !ok { + p.getErrorHandler()(rw, req, fmt.Errorf("internal error: 101 switching protocols response with non-writable body")) + return + } + + rc := http.NewResponseController(rw) + conn, brw, hijackErr := rc.Hijack() + if errors.Is(hijackErr, http.ErrNotSupported) { + p.getErrorHandler()(rw, req, fmt.Errorf("can't switch protocols using non-Hijacker ResponseWriter type %T", rw)) + return + } + + backConnCloseCh := make(chan bool) + go func() { + // Ensure that the cancellation of a request closes the backend. + // See issue https://golang.org/issue/35559. + select { + case <-req.Context().Done(): + case <-backConnCloseCh: + } + backConn.Close() + }() + defer close(backConnCloseCh) + + if hijackErr != nil { + p.getErrorHandler()(rw, req, fmt.Errorf("Hijack failed on protocol switch: %v", hijackErr)) + return + } + defer conn.Close() + + copyHeader(rw.Header(), res.Header) + + res.Header = rw.Header() + res.Body = nil // so res.Write only writes the headers; we have res.Body in backConn above + if err := res.Write(brw); err != nil { + p.getErrorHandler()(rw, req, fmt.Errorf("response write: %v", err)) + return + } + if err := brw.Flush(); err != nil { + p.getErrorHandler()(rw, req, fmt.Errorf("response flush: %v", err)) + return + } + errc := make(chan error, 1) + spc := switchProtocolCopier{user: conn, backend: backConn} + go spc.copyToBackend(errc) + go spc.copyFromBackend(errc) + + // Wait until both copy functions have sent on the error channel, + // or until one fails. + err := <-errc + if err == nil { + err = <-errc + } +} + +var errCopyDone = errors.New("hijacked connection copy complete") + +// switchProtocolCopier exists so goroutines proxying data back and +// forth have nice names in stacks. +type switchProtocolCopier struct { + user, backend io.ReadWriter +} + +func (c switchProtocolCopier) copyFromBackend(errc chan<- error) { + if _, err := io.Copy(c.user, c.backend); err != nil { + errc <- err + return + } + + // backend conn has reached EOF so propogate close write to user conn + if wc, ok := c.user.(interface{ CloseWrite() error }); ok { + errc <- wc.CloseWrite() + return + } + + errc <- errCopyDone +} + +func (c switchProtocolCopier) copyToBackend(errc chan<- error) { + if _, err := io.Copy(c.backend, c.user); err != nil { + errc <- err + return + } + + // user conn has reached EOF so propogate close write to backend conn + if wc, ok := c.backend.(interface{ CloseWrite() error }); ok { + errc <- wc.CloseWrite() + return + } + + errc <- errCopyDone +} + +func cleanQueryParams(s string) string { + reencode := func(s string) string { + v, _ := url.ParseQuery(s) + return v.Encode() + } + for i := 0; i < len(s); { + switch s[i] { + case ';': + return reencode(s) + case '%': + if i+2 >= len(s) || !ishex(s[i+1]) || !ishex(s[i+2]) { + return reencode(s) + } + i += 3 + default: + i++ + } + } + return s +} + +func ishex(c byte) bool { + switch { + case '0' <= c && c <= '9': + return true + case 'a' <= c && c <= 'f': + return true + case 'A' <= c && c <= 'F': + return true + } + return false +} diff --git a/backend/vendor/github.com/enetx/http/internal/ascii/print.go b/backend/vendor/github.com/enetx/http/internal/ascii/print.go new file mode 100644 index 0000000..98dbf4e --- /dev/null +++ b/backend/vendor/github.com/enetx/http/internal/ascii/print.go @@ -0,0 +1,61 @@ +// Copyright 2021 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ascii + +import ( + "strings" + "unicode" +) + +// EqualFold is [strings.EqualFold], ASCII only. It reports whether s and t +// are equal, ASCII-case-insensitively. +func EqualFold(s, t string) bool { + if len(s) != len(t) { + return false + } + for i := 0; i < len(s); i++ { + if lower(s[i]) != lower(t[i]) { + return false + } + } + return true +} + +// lower returns the ASCII lowercase version of b. +func lower(b byte) byte { + if 'A' <= b && b <= 'Z' { + return b + ('a' - 'A') + } + return b +} + +// IsPrint returns whether s is ASCII and printable according to +// https://tools.ietf.org/html/rfc20#section-4.2. +func IsPrint(s string) bool { + for i := 0; i < len(s); i++ { + if s[i] < ' ' || s[i] > '~' { + return false + } + } + return true +} + +// Is returns whether s is ASCII. +func Is(s string) bool { + for i := 0; i < len(s); i++ { + if s[i] > unicode.MaxASCII { + return false + } + } + return true +} + +// ToLower returns the lowercase version of s if s is ASCII and printable. +func ToLower(s string) (lower string, ok bool) { + if !IsPrint(s) { + return "", false + } + return strings.ToLower(s), true +} diff --git a/backend/vendor/github.com/enetx/http/internal/chunked.go b/backend/vendor/github.com/enetx/http/internal/chunked.go new file mode 100644 index 0000000..0b08a97 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/internal/chunked.go @@ -0,0 +1,300 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// The wire protocol for HTTP's "chunked" Transfer-Encoding. + +// Package internal contains HTTP internals shared by net/http and +// net/http/httputil. +package internal + +import ( + "bufio" + "bytes" + "errors" + "fmt" + "io" +) + +const maxLineLength = 4096 // assumed <= bufio.defaultBufSize + +var ErrLineTooLong = errors.New("header line too long") + +// NewChunkedReader returns a new chunkedReader that translates the data read from r +// out of HTTP "chunked" format before returning it. +// The chunkedReader returns [io.EOF] when the final 0-length chunk is read. +// +// NewChunkedReader is not needed by normal applications. The http package +// automatically decodes chunking when reading response bodies. +func NewChunkedReader(r io.Reader) io.Reader { + br, ok := r.(*bufio.Reader) + if !ok { + br = bufio.NewReader(r) + } + return &chunkedReader{r: br} +} + +type chunkedReader struct { + r *bufio.Reader + n uint64 // unread bytes in chunk + err error + buf [2]byte + checkEnd bool // whether need to check for \r\n chunk footer + excess int64 // "excessive" chunk overhead, for malicious sender detection +} + +func (cr *chunkedReader) beginChunk() { + // chunk-size CRLF + var line []byte + line, cr.err = readChunkLine(cr.r) + if cr.err != nil { + return + } + cr.excess += int64(len(line)) + 2 // header, plus \r\n after the chunk data + line = trimTrailingWhitespace(line) + line, cr.err = removeChunkExtension(line) + if cr.err != nil { + return + } + cr.n, cr.err = parseHexUint(line) + if cr.err != nil { + return + } + // A sender who sends one byte per chunk will send 5 bytes of overhead + // for every byte of data. ("1\r\nX\r\n" to send "X".) + // We want to allow this, since streaming a byte at a time can be legitimate. + // + // A sender can use chunk extensions to add arbitrary amounts of additional + // data per byte read. ("1;very long extension\r\nX\r\n" to send "X".) + // We don't want to disallow extensions (although we discard them), + // but we also don't want to allow a sender to reduce the signal/noise ratio + // arbitrarily. + // + // We track the amount of excess overhead read, + // and produce an error if it grows too large. + // + // Currently, we say that we're willing to accept 16 bytes of overhead per chunk, + // plus twice the amount of real data in the chunk. + cr.excess -= 16 + (2 * int64(cr.n)) + cr.excess = max(cr.excess, 0) + if cr.excess > 16*1024 { + cr.err = errors.New("chunked encoding contains too much non-data") + } + if cr.n == 0 { + cr.err = io.EOF + } +} + +func (cr *chunkedReader) chunkHeaderAvailable() bool { + n := cr.r.Buffered() + if n > 0 { + peek, _ := cr.r.Peek(n) + return bytes.IndexByte(peek, '\n') >= 0 + } + return false +} + +func (cr *chunkedReader) Read(b []uint8) (n int, err error) { + for cr.err == nil { + if cr.checkEnd { + if n > 0 && cr.r.Buffered() < 2 { + // We have some data. Return early (per the io.Reader + // contract) instead of potentially blocking while + // reading more. + break + } + if _, cr.err = io.ReadFull(cr.r, cr.buf[:2]); cr.err == nil { + if string(cr.buf[:]) != "\r\n" { + cr.err = errors.New("malformed chunked encoding") + break + } + } else { + if cr.err == io.EOF { + cr.err = io.ErrUnexpectedEOF + } + break + } + cr.checkEnd = false + } + if cr.n == 0 { + if n > 0 && !cr.chunkHeaderAvailable() { + // We've read enough. Don't potentially block + // reading a new chunk header. + break + } + cr.beginChunk() + continue + } + if len(b) == 0 { + break + } + rbuf := b + if uint64(len(rbuf)) > cr.n { + rbuf = rbuf[:cr.n] + } + var n0 int + n0, cr.err = cr.r.Read(rbuf) + n += n0 + b = b[n0:] + cr.n -= uint64(n0) + // If we're at the end of a chunk, read the next two + // bytes to verify they are "\r\n". + if cr.n == 0 && cr.err == nil { + cr.checkEnd = true + } else if cr.err == io.EOF { + cr.err = io.ErrUnexpectedEOF + } + } + return n, cr.err +} + +// Read a line of bytes (up to \n) from b. +// Give up if the line exceeds maxLineLength. +// The returned bytes are owned by the bufio.Reader +// so they are only valid until the next bufio read. +func readChunkLine(b *bufio.Reader) ([]byte, error) { + p, err := b.ReadSlice('\n') + if err != nil { + // We always know when EOF is coming. + // If the caller asked for a line, there should be a line. + if err == io.EOF { + err = io.ErrUnexpectedEOF + } else if err == bufio.ErrBufferFull { + err = ErrLineTooLong + } + return nil, err + } + + // RFC 9112 permits parsers to accept a bare \n as a line ending in headers, + // but not in chunked encoding lines. See https://www.rfc-editor.org/errata/eid7633, + // which explicitly rejects a clarification permitting \n as a chunk terminator. + // + // Verify that the line ends in a CRLF, and that no CRs appear before the end. + if idx := bytes.IndexByte(p, '\r'); idx == -1 { + return nil, errors.New("chunked line ends with bare LF") + } else if idx != len(p)-2 { + return nil, errors.New("invalid CR in chunked line") + } + p = p[:len(p)-2] // trim CRLF + + if len(p) >= maxLineLength { + return nil, ErrLineTooLong + } + return p, nil +} + +func trimTrailingWhitespace(b []byte) []byte { + for len(b) > 0 && isOWS(b[len(b)-1]) { + b = b[:len(b)-1] + } + return b +} + +func isOWS(b byte) bool { + return b == ' ' || b == '\t' +} + +var semi = []byte(";") + +// removeChunkExtension removes any chunk-extension from p. +// For example, +// +// "0" => "0" +// "0;token" => "0" +// "0;token=val" => "0" +// `0;token="quoted string"` => "0" +func removeChunkExtension(p []byte) ([]byte, error) { + p, _, _ = bytes.Cut(p, semi) + // TODO: care about exact syntax of chunk extensions? We're + // ignoring and stripping them anyway. For now just never + // return an error. + return p, nil +} + +// NewChunkedWriter returns a new chunkedWriter that translates writes into HTTP +// "chunked" format before writing them to w. Closing the returned chunkedWriter +// sends the final 0-length chunk that marks the end of the stream but does +// not send the final CRLF that appears after trailers; trailers and the last +// CRLF must be written separately. +// +// NewChunkedWriter is not needed by normal applications. The http +// package adds chunking automatically if handlers don't set a +// Content-Length header. Using newChunkedWriter inside a handler +// would result in double chunking or chunking with a Content-Length +// length, both of which are wrong. +func NewChunkedWriter(w io.Writer) io.WriteCloser { + return &chunkedWriter{w} +} + +// Writing to chunkedWriter translates to writing in HTTP chunked Transfer +// Encoding wire format to the underlying Wire chunkedWriter. +type chunkedWriter struct { + Wire io.Writer +} + +// Write the contents of data as one chunk to Wire. +// NOTE: Note that the corresponding chunk-writing procedure in Conn.Write has +// a bug since it does not check for success of [io.WriteString] +func (cw *chunkedWriter) Write(data []byte) (n int, err error) { + + // Don't send 0-length data. It looks like EOF for chunked encoding. + if len(data) == 0 { + return 0, nil + } + + if _, err = fmt.Fprintf(cw.Wire, "%x\r\n", len(data)); err != nil { + return 0, err + } + if n, err = cw.Wire.Write(data); err != nil { + return + } + if n != len(data) { + err = io.ErrShortWrite + return + } + if _, err = io.WriteString(cw.Wire, "\r\n"); err != nil { + return + } + if bw, ok := cw.Wire.(*FlushAfterChunkWriter); ok { + err = bw.Flush() + } + return +} + +func (cw *chunkedWriter) Close() error { + _, err := io.WriteString(cw.Wire, "0\r\n") + return err +} + +// FlushAfterChunkWriter signals from the caller of [NewChunkedWriter] +// that each chunk should be followed by a flush. It is used by the +// [net/http.Transport] code to keep the buffering behavior for headers and +// trailers, but flush out chunks aggressively in the middle for +// request bodies which may be generated slowly. See Issue 6574. +type FlushAfterChunkWriter struct { + *bufio.Writer +} + +func parseHexUint(v []byte) (n uint64, err error) { + if len(v) == 0 { + return 0, errors.New("empty hex number for chunk length") + } + for i, b := range v { + switch { + case '0' <= b && b <= '9': + b = b - '0' + case 'a' <= b && b <= 'f': + b = b - 'a' + 10 + case 'A' <= b && b <= 'F': + b = b - 'A' + 10 + default: + return 0, errors.New("invalid byte in chunk length") + } + if i == 16 { + return 0, errors.New("http chunk length too large") + } + n <<= 4 + n |= uint64(b) + } + return +} diff --git a/backend/vendor/github.com/enetx/http/internal/nettrace/nettrace.go b/backend/vendor/github.com/enetx/http/internal/nettrace/nettrace.go new file mode 100644 index 0000000..7d46268 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/internal/nettrace/nettrace.go @@ -0,0 +1,46 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package nettrace contains internal hooks for tracing activity in +// the net package. This package is purely internal for use by the +// net/http/httptrace package and has no stable API exposed to end +// users. +package nettrace + +// TraceKey is a context.Context Value key. Its associated value should +// be a *Trace struct. +type TraceKey struct{} + +// LookupIPAltResolverKey is a context.Context Value key used by tests to +// specify an alternate resolver func. +// It is not exposed to outsider users. (But see issue 12503) +// The value should be the same type as lookupIP: +// +// func lookupIP(ctx context.Context, host string) ([]IPAddr, error) +type LookupIPAltResolverKey struct{} + +// Trace contains a set of hooks for tracing events within +// the net package. Any specific hook may be nil. +type Trace struct { + // DNSStart is called with the hostname of a DNS lookup + // before it begins. + DNSStart func(name string) + + // DNSDone is called after a DNS lookup completes (or fails). + // The coalesced parameter is whether singleflight de-duped + // the call. The addrs are of type net.IPAddr but can't + // actually be for circular dependency reasons. + DNSDone func(netIPs []any, coalesced bool, err error) + + // ConnectStart is called before a Dial, excluding Dials made + // during DNS lookups. In the case of DualStack (Happy Eyeballs) + // dialing, this may be called multiple times, from multiple + // goroutines. + ConnectStart func(network, addr string) + + // ConnectDone is called after a Dial with the results, excluding + // Dials made during DNS lookups. It may also be called multiple + // times, like ConnectStart. + ConnectDone func(network, addr string, err error) +} diff --git a/backend/vendor/github.com/enetx/http/jar.go b/backend/vendor/github.com/enetx/http/jar.go new file mode 100644 index 0000000..5c3de0d --- /dev/null +++ b/backend/vendor/github.com/enetx/http/jar.go @@ -0,0 +1,27 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http + +import ( + "net/url" +) + +// A CookieJar manages storage and use of cookies in HTTP requests. +// +// Implementations of CookieJar must be safe for concurrent use by multiple +// goroutines. +// +// The net/http/cookiejar package provides a CookieJar implementation. +type CookieJar interface { + // SetCookies handles the receipt of the cookies in a reply for the + // given URL. It may or may not choose to save the cookies, depending + // on the jar's policy and implementation. + SetCookies(u *url.URL, cookies []*Cookie) + + // Cookies returns the cookies to send in a request for the given URL. + // It is up to the implementation to honor the standard cookie use + // restrictions such as in RFC 6265. + Cookies(u *url.URL) []*Cookie +} diff --git a/backend/vendor/github.com/enetx/http/mapping.go b/backend/vendor/github.com/enetx/http/mapping.go new file mode 100644 index 0000000..87e6d5a --- /dev/null +++ b/backend/vendor/github.com/enetx/http/mapping.go @@ -0,0 +1,78 @@ +// Copyright 2023 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http + +// A mapping is a collection of key-value pairs where the keys are unique. +// A zero mapping is empty and ready to use. +// A mapping tries to pick a representation that makes [mapping.find] most efficient. +type mapping[K comparable, V any] struct { + s []entry[K, V] // for few pairs + m map[K]V // for many pairs +} + +type entry[K comparable, V any] struct { + key K + value V +} + +// maxSlice is the maximum number of pairs for which a slice is used. +// It is a variable for benchmarking. +var maxSlice int = 8 + +// add adds a key-value pair to the mapping. +func (h *mapping[K, V]) add(k K, v V) { + if h.m == nil && len(h.s) < maxSlice { + h.s = append(h.s, entry[K, V]{k, v}) + } else { + if h.m == nil { + h.m = map[K]V{} + for _, e := range h.s { + h.m[e.key] = e.value + } + h.s = nil + } + h.m[k] = v + } +} + +// find returns the value corresponding to the given key. +// The second return value is false if there is no value +// with that key. +func (h *mapping[K, V]) find(k K) (v V, found bool) { + if h == nil { + return v, false + } + if h.m != nil { + v, found = h.m[k] + return v, found + } + for _, e := range h.s { + if e.key == k { + return e.value, true + } + } + return v, false +} + +// eachPair calls f for each pair in the mapping. +// If f returns false, pairs returns immediately. +func (h *mapping[K, V]) eachPair(f func(k K, v V) bool) { + if h == nil { + return + } + if h.m != nil { + for k, v := range h.m { + if !f(k, v) { + return + } + } + } else { + for _, e := range h.s { + if !f(e.key, e.value) { + return + } + } + } +} diff --git a/backend/vendor/github.com/enetx/http/method.go b/backend/vendor/github.com/enetx/http/method.go new file mode 100644 index 0000000..6f46155 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/method.go @@ -0,0 +1,20 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http + +// Common HTTP methods. +// +// Unless otherwise noted, these are defined in RFC 7231 section 4.3. +const ( + MethodGet = "GET" + MethodHead = "HEAD" + MethodPost = "POST" + MethodPut = "PUT" + MethodPatch = "PATCH" // RFC 5789 + MethodDelete = "DELETE" + MethodConnect = "CONNECT" + MethodOptions = "OPTIONS" + MethodTrace = "TRACE" +) diff --git a/backend/vendor/github.com/enetx/http/omithttp2.go b/backend/vendor/github.com/enetx/http/omithttp2.go new file mode 100644 index 0000000..ca08ddf --- /dev/null +++ b/backend/vendor/github.com/enetx/http/omithttp2.go @@ -0,0 +1,79 @@ +// Copyright 2019 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build nethttpomithttp2 + +package http + +import ( + "errors" + "sync" + "time" +) + +func init() { + omitBundledHTTP2 = true +} + +const noHTTP2 = "no bundled HTTP/2" // should never see this + +var http2errRequestCanceled = errors.New("net/http: request canceled") + +var http2goAwayTimeout = 1 * time.Second + +const http2NextProtoTLS = "h2" + +type http2Transport struct { + MaxHeaderListSize uint32 + ConnPool any +} + +func (*http2Transport) RoundTrip(*Request) (*Response, error) { panic(noHTTP2) } +func (*http2Transport) CloseIdleConnections() {} + +type http2noDialH2RoundTripper struct{} + +func (http2noDialH2RoundTripper) RoundTrip(*Request) (*Response, error) { panic(noHTTP2) } + +type http2noDialClientConnPool struct { + http2clientConnPool http2clientConnPool +} + +type http2clientConnPool struct { + mu *sync.Mutex + conns map[string][]*http2clientConn +} + +type http2clientConn struct{} + +type http2clientConnIdleState struct { + canTakeNewRequest bool +} + +func (cc *http2clientConn) idleState() http2clientConnIdleState { return http2clientConnIdleState{} } + +func http2configureTransports(*Transport) (*http2Transport, error) { panic(noHTTP2) } + +func http2isNoCachedConnError(err error) bool { + _, ok := err.(interface{ IsHTTP2NoCachedConnError() }) + return ok +} + +type http2Server struct { + NewWriteScheduler func() http2WriteScheduler +} + +type http2WriteScheduler any + +func http2NewPriorityWriteScheduler(any) http2WriteScheduler { panic(noHTTP2) } + +func http2ConfigureServer(s *Server, conf *http2Server) error { panic(noHTTP2) } + +var http2ErrNoCachedConn = http2noCachedConnError{} + +type http2noCachedConnError struct{} + +func (http2noCachedConnError) IsHTTP2NoCachedConnError() {} + +func (http2noCachedConnError) Error() string { return "http2: no cached connection was available" } diff --git a/backend/vendor/github.com/enetx/http/pattern.go b/backend/vendor/github.com/enetx/http/pattern.go new file mode 100644 index 0000000..8fd120e --- /dev/null +++ b/backend/vendor/github.com/enetx/http/pattern.go @@ -0,0 +1,532 @@ +// Copyright 2023 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Patterns for ServeMux routing. + +package http + +import ( + "errors" + "fmt" + "net/url" + "strings" + "unicode" +) + +// A pattern is something that can be matched against an HTTP request. +// It has an optional method, an optional host, and a path. +type pattern struct { + str string // original string + method string + host string + // The representation of a path differs from the surface syntax, which + // simplifies most algorithms. + // + // Paths ending in '/' are represented with an anonymous "..." wildcard. + // For example, the path "a/" is represented as a literal segment "a" followed + // by a segment with multi==true. + // + // Paths ending in "{$}" are represented with the literal segment "/". + // For example, the path "a/{$}" is represented as a literal segment "a" followed + // by a literal segment "/". + segments []segment + loc string // source location of registering call, for helpful messages +} + +func (p *pattern) String() string { return p.str } + +func (p *pattern) lastSegment() segment { + return p.segments[len(p.segments)-1] +} + +// A segment is a pattern piece that matches one or more path segments, or +// a trailing slash. +// +// If wild is false, it matches a literal segment, or, if s == "/", a trailing slash. +// Examples: +// +// "a" => segment{s: "a"} +// "/{$}" => segment{s: "/"} +// +// If wild is true and multi is false, it matches a single path segment. +// Example: +// +// "{x}" => segment{s: "x", wild: true} +// +// If both wild and multi are true, it matches all remaining path segments. +// Example: +// +// "{rest...}" => segment{s: "rest", wild: true, multi: true} +type segment struct { + s string // literal or wildcard name or "/" for "/{$}". + wild bool + multi bool // "..." wildcard +} + +// parsePattern parses a string into a Pattern. +// The string's syntax is +// +// [METHOD] [HOST]/[PATH] +// +// where: +// - METHOD is an HTTP method +// - HOST is a hostname +// - PATH consists of slash-separated segments, where each segment is either +// a literal or a wildcard of the form "{name}", "{name...}", or "{$}". +// +// METHOD, HOST and PATH are all optional; that is, the string can be "/". +// If METHOD is present, it must be followed by at least one space or tab. +// Wildcard names must be valid Go identifiers. +// The "{$}" and "{name...}" wildcard must occur at the end of PATH. +// PATH may end with a '/'. +// Wildcard names in a path must be distinct. +func parsePattern(s string) (_ *pattern, err error) { + if len(s) == 0 { + return nil, errors.New("empty pattern") + } + off := 0 // offset into string + defer func() { + if err != nil { + err = fmt.Errorf("at offset %d: %w", off, err) + } + }() + + method, rest, found := s, "", false + if i := strings.IndexAny(s, " \t"); i >= 0 { + method, rest, found = s[:i], strings.TrimLeft(s[i+1:], " \t"), true + } + if !found { + rest = method + method = "" + } + if method != "" && !validMethod(method) { + return nil, fmt.Errorf("invalid method %q", method) + } + p := &pattern{str: s, method: method} + + if found { + off = len(method) + 1 + } + i := strings.IndexByte(rest, '/') + if i < 0 { + return nil, errors.New("host/path missing /") + } + p.host = rest[:i] + rest = rest[i:] + if j := strings.IndexByte(p.host, '{'); j >= 0 { + off += j + return nil, errors.New("host contains '{' (missing initial '/'?)") + } + // At this point, rest is the path. + off += i + + // An unclean path with a method that is not CONNECT can never match, + // because paths are cleaned before matching. + if method != "" && method != "CONNECT" && rest != cleanPath(rest) { + return nil, errors.New("non-CONNECT pattern with unclean path can never match") + } + + seenNames := map[string]bool{} // remember wildcard names to catch dups + for len(rest) > 0 { + // Invariant: rest[0] == '/'. + rest = rest[1:] + off = len(s) - len(rest) + if len(rest) == 0 { + // Trailing slash. + p.segments = append(p.segments, segment{wild: true, multi: true}) + break + } + i := strings.IndexByte(rest, '/') + if i < 0 { + i = len(rest) + } + var seg string + seg, rest = rest[:i], rest[i:] + if i := strings.IndexByte(seg, '{'); i < 0 { + // Literal. + seg = pathUnescape(seg) + p.segments = append(p.segments, segment{s: seg}) + } else { + // Wildcard. + if i != 0 { + return nil, errors.New("bad wildcard segment (must start with '{')") + } + if seg[len(seg)-1] != '}' { + return nil, errors.New("bad wildcard segment (must end with '}')") + } + name := seg[1 : len(seg)-1] + if name == "$" { + if len(rest) != 0 { + return nil, errors.New("{$} not at end") + } + p.segments = append(p.segments, segment{s: "/"}) + break + } + name, multi := strings.CutSuffix(name, "...") + if multi && len(rest) != 0 { + return nil, errors.New("{...} wildcard not at end") + } + if name == "" { + return nil, errors.New("empty wildcard") + } + if !isValidWildcardName(name) { + return nil, fmt.Errorf("bad wildcard name %q", name) + } + if seenNames[name] { + return nil, fmt.Errorf("duplicate wildcard name %q", name) + } + seenNames[name] = true + p.segments = append(p.segments, segment{s: name, wild: true, multi: multi}) + } + } + return p, nil +} + +func isValidWildcardName(s string) bool { + if s == "" { + return false + } + // Valid Go identifier. + for i, c := range s { + if !unicode.IsLetter(c) && c != '_' && (i == 0 || !unicode.IsDigit(c)) { + return false + } + } + return true +} + +func pathUnescape(path string) string { + u, err := url.PathUnescape(path) + if err != nil { + // Invalidly escaped path; use the original + return path + } + return u +} + +// relationship is a relationship between two patterns, p1 and p2. +type relationship string + +const ( + equivalent relationship = "equivalent" // both match the same requests + moreGeneral relationship = "moreGeneral" // p1 matches everything p2 does & more + moreSpecific relationship = "moreSpecific" // p2 matches everything p1 does & more + disjoint relationship = "disjoint" // there is no request that both match + overlaps relationship = "overlaps" // there is a request that both match, but neither is more specific +) + +// conflictsWith reports whether p1 conflicts with p2, that is, whether +// there is a request that both match but where neither is higher precedence +// than the other. +// +// Precedence is defined by two rules: +// 1. Patterns with a host win over patterns without a host. +// 2. Patterns whose method and path is more specific win. One pattern is more +// specific than another if the second matches all the (method, path) pairs +// of the first and more. +// +// If rule 1 doesn't apply, then two patterns conflict if their relationship +// is either equivalence (they match the same set of requests) or overlap +// (they both match some requests, but neither is more specific than the other). +func (p1 *pattern) conflictsWith(p2 *pattern) bool { + if p1.host != p2.host { + // Either one host is empty and the other isn't, in which case the + // one with the host wins by rule 1, or neither host is empty + // and they differ, so they won't match the same paths. + return false + } + rel := p1.comparePathsAndMethods(p2) + return rel == equivalent || rel == overlaps +} + +func (p1 *pattern) comparePathsAndMethods(p2 *pattern) relationship { + mrel := p1.compareMethods(p2) + // Optimization: avoid a call to comparePaths. + if mrel == disjoint { + return disjoint + } + prel := p1.comparePaths(p2) + return combineRelationships(mrel, prel) +} + +// compareMethods determines the relationship between the method +// part of patterns p1 and p2. +// +// A method can either be empty, "GET", or something else. +// The empty string matches any method, so it is the most general. +// "GET" matches both GET and HEAD. +// Anything else matches only itself. +func (p1 *pattern) compareMethods(p2 *pattern) relationship { + if p1.method == p2.method { + return equivalent + } + if p1.method == "" { + // p1 matches any method, but p2 does not, so p1 is more general. + return moreGeneral + } + if p2.method == "" { + return moreSpecific + } + if p1.method == "GET" && p2.method == "HEAD" { + // p1 matches GET and HEAD; p2 matches only HEAD. + return moreGeneral + } + if p2.method == "GET" && p1.method == "HEAD" { + return moreSpecific + } + return disjoint +} + +// comparePaths determines the relationship between the path +// part of two patterns. +func (p1 *pattern) comparePaths(p2 *pattern) relationship { + // Optimization: if a path pattern doesn't end in a multi ("...") wildcard, then it + // can only match paths with the same number of segments. + if len(p1.segments) != len(p2.segments) && !p1.lastSegment().multi && !p2.lastSegment().multi { + return disjoint + } + + // Consider corresponding segments in the two path patterns. + var segs1, segs2 []segment + rel := equivalent + for segs1, segs2 = p1.segments, p2.segments; len(segs1) > 0 && len(segs2) > 0; segs1, segs2 = segs1[1:], segs2[1:] { + rel = combineRelationships(rel, compareSegments(segs1[0], segs2[0])) + if rel == disjoint { + return rel + } + } + // We've reached the end of the corresponding segments of the patterns. + // If they have the same number of segments, then we've already determined + // their relationship. + if len(segs1) == 0 && len(segs2) == 0 { + return rel + } + // Otherwise, the only way they could fail to be disjoint is if the shorter + // pattern ends in a multi. In that case, that multi is more general + // than the remainder of the longer pattern, so combine those two relationships. + if len(segs1) < len(segs2) && p1.lastSegment().multi { + return combineRelationships(rel, moreGeneral) + } + if len(segs2) < len(segs1) && p2.lastSegment().multi { + return combineRelationships(rel, moreSpecific) + } + return disjoint +} + +// compareSegments determines the relationship between two segments. +func compareSegments(s1, s2 segment) relationship { + if s1.multi && s2.multi { + return equivalent + } + if s1.multi { + return moreGeneral + } + if s2.multi { + return moreSpecific + } + if s1.wild && s2.wild { + return equivalent + } + if s1.wild { + if s2.s == "/" { + // A single wildcard doesn't match a trailing slash. + return disjoint + } + return moreGeneral + } + if s2.wild { + if s1.s == "/" { + return disjoint + } + return moreSpecific + } + // Both literals. + if s1.s == s2.s { + return equivalent + } + return disjoint +} + +// combineRelationships determines the overall relationship of two patterns +// given the relationships of a partition of the patterns into two parts. +// +// For example, if p1 is more general than p2 in one way but equivalent +// in the other, then it is more general overall. +// +// Or if p1 is more general in one way and more specific in the other, then +// they overlap. +func combineRelationships(r1, r2 relationship) relationship { + switch r1 { + case equivalent: + return r2 + case disjoint: + return disjoint + case overlaps: + if r2 == disjoint { + return disjoint + } + return overlaps + case moreGeneral, moreSpecific: + switch r2 { + case equivalent: + return r1 + case inverseRelationship(r1): + return overlaps + default: + return r2 + } + default: + panic(fmt.Sprintf("unknown relationship %q", r1)) + } +} + +// If p1 has relationship `r` to p2, then +// p2 has inverseRelationship(r) to p1. +func inverseRelationship(r relationship) relationship { + switch r { + case moreSpecific: + return moreGeneral + case moreGeneral: + return moreSpecific + default: + return r + } +} + +// isLitOrSingle reports whether the segment is a non-dollar literal or a single wildcard. +func isLitOrSingle(seg segment) bool { + if seg.wild { + return !seg.multi + } + return seg.s != "/" +} + +// describeConflict returns an explanation of why two patterns conflict. +func describeConflict(p1, p2 *pattern) string { + mrel := p1.compareMethods(p2) + prel := p1.comparePaths(p2) + rel := combineRelationships(mrel, prel) + if rel == equivalent { + return fmt.Sprintf("%s matches the same requests as %s", p1, p2) + } + if rel != overlaps { + panic("describeConflict called with non-conflicting patterns") + } + if prel == overlaps { + return fmt.Sprintf(`%[1]s and %[2]s both match some paths, like %[3]q. +But neither is more specific than the other. +%[1]s matches %[4]q, but %[2]s doesn't. +%[2]s matches %[5]q, but %[1]s doesn't.`, + p1, p2, commonPath(p1, p2), differencePath(p1, p2), differencePath(p2, p1)) + } + if mrel == moreGeneral && prel == moreSpecific { + return fmt.Sprintf("%s matches more methods than %s, but has a more specific path pattern", p1, p2) + } + if mrel == moreSpecific && prel == moreGeneral { + return fmt.Sprintf("%s matches fewer methods than %s, but has a more general path pattern", p1, p2) + } + return fmt.Sprintf("bug: unexpected way for two patterns %s and %s to conflict: methods %s, paths %s", p1, p2, mrel, prel) +} + +// writeMatchingPath writes to b a path that matches the segments. +func writeMatchingPath(b *strings.Builder, segs []segment) { + for _, s := range segs { + writeSegment(b, s) + } +} + +func writeSegment(b *strings.Builder, s segment) { + b.WriteByte('/') + if !s.multi && s.s != "/" { + b.WriteString(s.s) + } +} + +// commonPath returns a path that both p1 and p2 match. +// It assumes there is such a path. +func commonPath(p1, p2 *pattern) string { + var b strings.Builder + var segs1, segs2 []segment + for segs1, segs2 = p1.segments, p2.segments; len(segs1) > 0 && len(segs2) > 0; segs1, segs2 = segs1[1:], segs2[1:] { + if s1 := segs1[0]; s1.wild { + writeSegment(&b, segs2[0]) + } else { + writeSegment(&b, s1) + } + } + if len(segs1) > 0 { + writeMatchingPath(&b, segs1) + } else if len(segs2) > 0 { + writeMatchingPath(&b, segs2) + } + return b.String() +} + +// differencePath returns a path that p1 matches and p2 doesn't. +// It assumes there is such a path. +func differencePath(p1, p2 *pattern) string { + var b strings.Builder + + var segs1, segs2 []segment + for segs1, segs2 = p1.segments, p2.segments; len(segs1) > 0 && len(segs2) > 0; segs1, segs2 = segs1[1:], segs2[1:] { + s1 := segs1[0] + s2 := segs2[0] + if s1.multi && s2.multi { + // From here the patterns match the same paths, so we must have found a difference earlier. + b.WriteByte('/') + return b.String() + + } + if s1.multi && !s2.multi { + // s1 ends in a "..." wildcard but s2 does not. + // A trailing slash will distinguish them, unless s2 ends in "{$}", + // in which case any segment will do; prefer the wildcard name if + // it has one. + b.WriteByte('/') + if s2.s == "/" { + if s1.s != "" { + b.WriteString(s1.s) + } else { + b.WriteString("x") + } + } + return b.String() + } + if !s1.multi && s2.multi { + writeSegment(&b, s1) + } else if s1.wild && s2.wild { + // Both patterns will match whatever we put here; use + // the first wildcard name. + writeSegment(&b, s1) + } else if s1.wild && !s2.wild { + // s1 is a wildcard, s2 is a literal. + // Any segment other than s2.s will work. + // Prefer the wildcard name, but if it's the same as the literal, + // tweak the literal. + if s1.s != s2.s { + writeSegment(&b, s1) + } else { + b.WriteByte('/') + b.WriteString(s2.s + "x") + } + } else if !s1.wild && s2.wild { + writeSegment(&b, s1) + } else { + // Both are literals. A precondition of this function is that the + // patterns overlap, so they must be the same literal. Use it. + if s1.s != s2.s { + panic(fmt.Sprintf("literals differ: %q and %q", s1.s, s2.s)) + } + writeSegment(&b, s1) + } + } + if len(segs1) > 0 { + // p1 is longer than p2, and p2 does not end in a multi. + // Anything that matches the rest of p1 will do. + writeMatchingPath(&b, segs1) + } else if len(segs2) > 0 { + writeMatchingPath(&b, segs2) + } + return b.String() +} diff --git a/backend/vendor/github.com/enetx/http/request.go b/backend/vendor/github.com/enetx/http/request.go new file mode 100644 index 0000000..c1b05fc --- /dev/null +++ b/backend/vendor/github.com/enetx/http/request.go @@ -0,0 +1,1580 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// HTTP Request reading and parsing. + +package http + +import ( + "bufio" + "bytes" + "context" + "crypto/tls" + "encoding/base64" + "errors" + "fmt" + "io" + "maps" + "mime" + "mime/multipart" + "net/textproto" + "net/url" + urlpkg "net/url" + "strconv" + "strings" + "sync" + _ "unsafe" // for linkname + + "github.com/enetx/http/httptrace" + "github.com/enetx/http/internal/ascii" + + "golang.org/x/net/http/httpguts" + "golang.org/x/net/idna" +) + +const ( + defaultMaxMemory = 32 << 20 // 32 MB +) + +// ErrMissingFile is returned by FormFile when the provided file field name +// is either not present in the request or not a file field. +var ErrMissingFile = errors.New("http: no such file") + +// ProtocolError represents an HTTP protocol error. +// +// Deprecated: Not all errors in the http package related to protocol errors +// are of type ProtocolError. +type ProtocolError struct { + ErrorString string +} + +func (pe *ProtocolError) Error() string { return pe.ErrorString } + +// Is lets http.ErrNotSupported match errors.ErrUnsupported. +func (pe *ProtocolError) Is(err error) bool { + return pe == ErrNotSupported && err == errors.ErrUnsupported +} + +var ( + // ErrNotSupported indicates that a feature is not supported. + // + // It is returned by ResponseController methods to indicate that + // the handler does not support the method, and by the Push method + // of Pusher implementations to indicate that HTTP/2 Push support + // is not available. + ErrNotSupported = &ProtocolError{"feature not supported"} + + // Deprecated: ErrUnexpectedTrailer is no longer returned by + // anything in the net/http package. Callers should not + // compare errors against this variable. + ErrUnexpectedTrailer = &ProtocolError{"trailer header without chunked transfer encoding"} + + // ErrMissingBoundary is returned by Request.MultipartReader when the + // request's Content-Type does not include a "boundary" parameter. + ErrMissingBoundary = &ProtocolError{"no multipart boundary param in Content-Type"} + + // ErrNotMultipart is returned by Request.MultipartReader when the + // request's Content-Type is not multipart/form-data. + ErrNotMultipart = &ProtocolError{"request Content-Type isn't multipart/form-data"} + + // Deprecated: ErrHeaderTooLong is no longer returned by + // anything in the net/http package. Callers should not + // compare errors against this variable. + ErrHeaderTooLong = &ProtocolError{"header too long"} + + // Deprecated: ErrShortBody is no longer returned by + // anything in the net/http package. Callers should not + // compare errors against this variable. + ErrShortBody = &ProtocolError{"entity body too short"} + + // Deprecated: ErrMissingContentLength is no longer returned by + // anything in the net/http package. Callers should not + // compare errors against this variable. + ErrMissingContentLength = &ProtocolError{"missing ContentLength in HEAD response"} +) + +func badStringError(what, val string) error { return fmt.Errorf("%s %q", what, val) } + +// Headers that Request.Write handles itself and should be skipped. +var reqWriteExcludeHeader = map[string]bool{ + "Host": true, // not in Header map anyway + "User-Agent": false, + "Content-Length": true, + "Transfer-Encoding": true, + "Trailer": true, +} + +// A Request represents an HTTP request received by a server +// or to be sent by a client. +// +// The field semantics differ slightly between client and server +// usage. In addition to the notes on the fields below, see the +// documentation for [Request.Write] and [RoundTripper]. +type Request struct { + // Method specifies the HTTP method (GET, POST, PUT, etc.). + // For client requests, an empty string means GET. + Method string + + // URL specifies either the URI being requested (for server + // requests) or the URL to access (for client requests). + // + // For server requests, the URL is parsed from the URI + // supplied on the Request-Line as stored in RequestURI. For + // most requests, fields other than Path and RawQuery will be + // empty. (See RFC 7230, Section 5.3) + // + // For client requests, the URL's Host specifies the server to + // connect to, while the Request's Host field optionally + // specifies the Host header value to send in the HTTP + // request. + URL *url.URL + + // The protocol version for incoming server requests. + // + // For client requests, these fields are ignored. The HTTP + // client code always uses either HTTP/1.1 or HTTP/2. + // See the docs on Transport for details. + Proto string // "HTTP/1.0" + ProtoMajor int // 1 + ProtoMinor int // 0 + + // Header contains the request header fields either received + // by the server or to be sent by the client. + // + // If a server received a request with header lines, + // + // Host: example.com + // accept-encoding: gzip, deflate + // Accept-Language: en-us + // fOO: Bar + // foo: two + // + // then + // + // Header = map[string][]string{ + // "Accept-Encoding": {"gzip, deflate"}, + // "Accept-Language": {"en-us"}, + // "Foo": {"Bar", "two"}, + // } + // + // For incoming requests, the Host header is promoted to the + // Request.Host field and removed from the Header map. + // + // HTTP defines that header names are case-insensitive. The + // request parser implements this by using CanonicalHeaderKey, + // making the first character and any characters following a + // hyphen uppercase and the rest lowercase. + // + // For client requests, certain headers such as Content-Length + // and Connection are automatically written when needed and + // values in Header may be ignored. See the documentation + // for the Request.Write method. + Header Header + + // Body is the request's body. + // + // For client requests, a nil body means the request has no + // body, such as a GET request. The HTTP Client's Transport + // is responsible for calling the Close method. + // + // For server requests, the Request Body is always non-nil + // but will return EOF immediately when no body is present. + // The Server will close the request body. The ServeHTTP + // Handler does not need to. + // + // Body must allow Read to be called concurrently with Close. + // In particular, calling Close should unblock a Read waiting + // for input. + Body io.ReadCloser + + // GetBody defines an optional func to return a new copy of + // Body. It is used for client requests when a redirect requires + // reading the body more than once. Use of GetBody still + // requires setting Body. + // + // For server requests, it is unused. + GetBody func() (io.ReadCloser, error) + + // ContentLength records the length of the associated content. + // The value -1 indicates that the length is unknown. + // Values >= 0 indicate that the given number of bytes may + // be read from Body. + // + // For client requests, a value of 0 with a non-nil Body is + // also treated as unknown. + ContentLength int64 + + // TransferEncoding lists the transfer encodings from outermost to + // innermost. An empty list denotes the "identity" encoding. + // TransferEncoding can usually be ignored; chunked encoding is + // automatically added and removed as necessary when sending and + // receiving requests. + TransferEncoding []string + + // Close indicates whether to close the connection after + // replying to this request (for servers) or after sending this + // request and reading its response (for clients). + // + // For server requests, the HTTP server handles this automatically + // and this field is not needed by Handlers. + // + // For client requests, setting this field prevents re-use of + // TCP connections between requests to the same hosts, as if + // Transport.DisableKeepAlives were set. + Close bool + + // For server requests, Host specifies the host on which the + // URL is sought. For HTTP/1 (per RFC 7230, section 5.4), this + // is either the value of the "Host" header or the host name + // given in the URL itself. For HTTP/2, it is the value of the + // ":authority" pseudo-header field. + // It may be of the form "host:port". For international domain + // names, Host may be in Punycode or Unicode form. Use + // golang.org/x/net/idna to convert it to either format if + // needed. + // To prevent DNS rebinding attacks, server Handlers should + // validate that the Host header has a value for which the + // Handler considers itself authoritative. The included + // ServeMux supports patterns registered to particular host + // names and thus protects its registered Handlers. + // + // For client requests, Host optionally overrides the Host + // header to send. If empty, the Request.Write method uses + // the value of URL.Host. Host may contain an international + // domain name. + Host string + + // Form contains the parsed form data, including both the URL + // field's query parameters and the PATCH, POST, or PUT form data. + // This field is only available after ParseForm is called. + // The HTTP client ignores Form and uses Body instead. + Form url.Values + + // PostForm contains the parsed form data from PATCH, POST + // or PUT body parameters. + // + // This field is only available after ParseForm is called. + // The HTTP client ignores PostForm and uses Body instead. + PostForm url.Values + + // MultipartForm is the parsed multipart form, including file uploads. + // This field is only available after ParseMultipartForm is called. + // The HTTP client ignores MultipartForm and uses Body instead. + MultipartForm *multipart.Form + + // Trailer specifies additional headers that are sent after the request + // body. + // + // For server requests, the Trailer map initially contains only the + // trailer keys, with nil values. (The client declares which trailers it + // will later send.) While the handler is reading from Body, it must + // not reference Trailer. After reading from Body returns EOF, Trailer + // can be read again and will contain non-nil values, if they were sent + // by the client. + // + // For client requests, Trailer must be initialized to a map containing + // the trailer keys to later send. The values may be nil or their final + // values. The ContentLength must be 0 or -1, to send a chunked request. + // After the HTTP request is sent the map values can be updated while + // the request body is read. Once the body returns EOF, the caller must + // not mutate Trailer. + // + // Few HTTP clients, servers, or proxies support HTTP trailers. + Trailer Header + + // RemoteAddr allows HTTP servers and other software to record + // the network address that sent the request, usually for + // logging. This field is not filled in by ReadRequest and + // has no defined format. The HTTP server in this package + // sets RemoteAddr to an "IP:port" address before invoking a + // handler. + // This field is ignored by the HTTP client. + RemoteAddr string + + // RequestURI is the unmodified request-target of the + // Request-Line (RFC 7230, Section 3.1.1) as sent by the client + // to a server. Usually the URL field should be used instead. + // It is an error to set this field in an HTTP client request. + RequestURI string + + // TLS allows HTTP servers and other software to record + // information about the TLS connection on which the request + // was received. This field is not filled in by ReadRequest. + // The HTTP server in this package sets the field for + // TLS-enabled connections before invoking a handler; + // otherwise it leaves the field nil. + // This field is ignored by the HTTP client. + TLS *tls.ConnectionState + + // Cancel is an optional channel whose closure indicates that the client + // request should be regarded as canceled. Not all implementations of + // RoundTripper may support Cancel. + // + // For server requests, this field is not applicable. + // + // Deprecated: Set the Request's context with NewRequestWithContext + // instead. If a Request's Cancel field and context are both + // set, it is undefined whether Cancel is respected. + Cancel <-chan struct{} + + // Response is the redirect response which caused this request + // to be created. This field is only populated during client + // redirects. + Response *Response + + // Pattern is the [ServeMux] pattern that matched the request. + // It is empty if the request was not matched against a pattern. + Pattern string + + // ctx is either the client or server context. It should only + // be modified via copying the whole Request using Clone or WithContext. + // It is unexported to prevent people from using Context wrong + // and mutating the contexts held by callers of the same request. + ctx context.Context + + // The following fields are for requests matched by ServeMux. + pat *pattern // the pattern that matched + matches []string // values for the matching wildcards in pat + otherValues map[string]string // for calls to SetPathValue that don't match a wildcard +} + +// Context returns the request's context. To change the context, use +// [Request.Clone] or [Request.WithContext]. +// +// The returned context is always non-nil; it defaults to the +// background context. +// +// For outgoing client requests, the context controls cancellation. +// +// For incoming server requests, the context is canceled when the +// client's connection closes, the request is canceled (with HTTP/2), +// or when the ServeHTTP method returns. +func (r *Request) Context() context.Context { + if r.ctx != nil { + return r.ctx + } + return context.Background() +} + +// WithContext returns a shallow copy of r with its context changed +// to ctx. The provided ctx must be non-nil. +// +// For outgoing client request, the context controls the entire +// lifetime of a request and its response: obtaining a connection, +// sending the request, and reading the response headers and body. +// +// To create a new request with a context, use [NewRequestWithContext]. +// To make a deep copy of a request with a new context, use [Request.Clone]. +func (r *Request) WithContext(ctx context.Context) *Request { + if ctx == nil { + panic("nil context") + } + r2 := new(Request) + *r2 = *r + r2.ctx = ctx + return r2 +} + +// Clone returns a deep copy of r with its context changed to ctx. +// The provided ctx must be non-nil. +// +// Clone only makes a shallow copy of the Body field. +// +// For an outgoing client request, the context controls the entire +// lifetime of a request and its response: obtaining a connection, +// sending the request, and reading the response headers and body. +func (r *Request) Clone(ctx context.Context) *Request { + if ctx == nil { + panic("nil context") + } + r2 := new(Request) + *r2 = *r + r2.ctx = ctx + r2.URL = cloneURL(r.URL) + r2.Header = r.Header.Clone() + r2.Trailer = r.Trailer.Clone() + if s := r.TransferEncoding; s != nil { + s2 := make([]string, len(s)) + copy(s2, s) + r2.TransferEncoding = s2 + } + r2.Form = cloneURLValues(r.Form) + r2.PostForm = cloneURLValues(r.PostForm) + r2.MultipartForm = cloneMultipartForm(r.MultipartForm) + + // Copy matches and otherValues. See issue 61410. + if s := r.matches; s != nil { + s2 := make([]string, len(s)) + copy(s2, s) + r2.matches = s2 + } + r2.otherValues = maps.Clone(r.otherValues) + return r2 +} + +// ProtoAtLeast reports whether the HTTP protocol used +// in the request is at least major.minor. +func (r *Request) ProtoAtLeast(major, minor int) bool { + return r.ProtoMajor > major || + r.ProtoMajor == major && r.ProtoMinor >= minor +} + +// UserAgent returns the client's User-Agent, if sent in the request. +func (r *Request) UserAgent() string { + return r.Header.Get("User-Agent") +} + +// Cookies parses and returns the HTTP cookies sent with the request. +func (r *Request) Cookies() []*Cookie { + return readCookies(r.Header, "") +} + +// CookiesNamed parses and returns the named HTTP cookies sent with the request +// or an empty slice if none matched. +func (r *Request) CookiesNamed(name string) []*Cookie { + if name == "" { + return []*Cookie{} + } + return readCookies(r.Header, name) +} + +// ErrNoCookie is returned by Request's Cookie method when a cookie is not found. +var ErrNoCookie = errors.New("http: named cookie not present") + +// Cookie returns the named cookie provided in the request or +// [ErrNoCookie] if not found. +// If multiple cookies match the given name, only one cookie will +// be returned. +func (r *Request) Cookie(name string) (*Cookie, error) { + if name == "" { + return nil, ErrNoCookie + } + for _, c := range readCookies(r.Header, name) { + return c, nil + } + return nil, ErrNoCookie +} + +// AddCookie adds a cookie to the request. Per RFC 6265 section 5.4, +// AddCookie does not attach more than one [Cookie] header field. That +// means all cookies, if any, are written into the same line, +// separated by semicolon. +// AddCookie only sanitizes c's name and value, and does not sanitize +// a Cookie header already present in the request. +func (r *Request) AddCookie(c *Cookie) { + s := fmt.Sprintf("%s=%s", sanitizeCookieName(c.Name), sanitizeCookieValue(c.Value, c.Quoted)) + if c := r.Header.Get("Cookie"); c != "" { + r.Header.Set("Cookie", c+"; "+s) + } else { + r.Header.Set("Cookie", s) + } +} + +// Referer returns the referring URL, if sent in the request. +// +// Referer is misspelled as in the request itself, a mistake from the +// earliest days of HTTP. This value can also be fetched from the +// [Header] map as Header["Referer"]; the benefit of making it available +// as a method is that the compiler can diagnose programs that use the +// alternate (correct English) spelling req.Referrer() but cannot +// diagnose programs that use Header["Referrer"]. +func (r *Request) Referer() string { + return r.Header.Get("Referer") +} + +// multipartByReader is a sentinel value. +// Its presence in Request.MultipartForm indicates that parsing of the request +// body has been handed off to a MultipartReader instead of ParseMultipartForm. +var multipartByReader = &multipart.Form{ + Value: make(map[string][]string), + File: make(map[string][]*multipart.FileHeader), +} + +// MultipartReader returns a MIME multipart reader if this is a +// multipart/form-data or a multipart/mixed POST request, else returns nil and an error. +// Use this function instead of [Request.ParseMultipartForm] to +// process the request body as a stream. +func (r *Request) MultipartReader() (*multipart.Reader, error) { + if r.MultipartForm == multipartByReader { + return nil, errors.New("http: MultipartReader called twice") + } + if r.MultipartForm != nil { + return nil, errors.New("http: multipart handled by ParseMultipartForm") + } + r.MultipartForm = multipartByReader + return r.multipartReader(true) +} + +func (r *Request) multipartReader(allowMixed bool) (*multipart.Reader, error) { + v := r.Header.Get("Content-Type") + if v == "" { + return nil, ErrNotMultipart + } + if r.Body == nil { + return nil, errors.New("missing form body") + } + d, params, err := mime.ParseMediaType(v) + if err != nil || !(d == "multipart/form-data" || allowMixed && d == "multipart/mixed") { + return nil, ErrNotMultipart + } + boundary, ok := params["boundary"] + if !ok { + return nil, ErrMissingBoundary + } + return multipart.NewReader(r.Body, boundary), nil +} + +// isH2Upgrade reports whether r represents the http2 "client preface" +// magic string. +func (r *Request) isH2Upgrade() bool { + return r.Method == "PRI" && len(r.Header) == 0 && r.URL.Path == "*" && r.Proto == "HTTP/2.0" +} + +// Return value if nonempty, def otherwise. +func valueOrDefault(value, def string) string { + if value != "" { + return value + } + return def +} + +// NOTE: This is not intended to reflect the actual Go version being used. +// It was changed at the time of Go 1.1 release because the former User-Agent +// had ended up blocked by some intrusion detection systems. +// See https://codereview.appspot.com/7532043. +const defaultUserAgent = "Go-http-client/1.1" + +// Write writes an HTTP/1.1 request, which is the header and body, in wire format. +// This method consults the following fields of the request: +// +// Host +// URL +// Method (defaults to "GET") +// Header +// ContentLength +// TransferEncoding +// Body +// +// If Body is present, Content-Length is <= 0 and [Request.TransferEncoding] +// hasn't been set to "identity", Write adds "Transfer-Encoding: +// chunked" to the header. Body is closed after it is sent. +func (r *Request) Write(w io.Writer) error { + return r.write(w, false, nil, nil) +} + +// WriteProxy is like [Request.Write] but writes the request in the form +// expected by an HTTP proxy. In particular, [Request.WriteProxy] writes the +// initial Request-URI line of the request with an absolute URI, per +// section 5.3 of RFC 7230, including the scheme and host. +// In either case, WriteProxy also writes a Host header, using +// either r.Host or r.URL.Host. +func (r *Request) WriteProxy(w io.Writer) error { + return r.write(w, true, nil, nil) +} + +// errMissingHost is returned by Write when there is no Host or URL present in +// the Request. +var errMissingHost = errors.New("http: Request.Write on Request with no Host or URL set") + +// extraHeaders may be nil +// waitForContinue may be nil +// always closes body +func (r *Request) write(w io.Writer, usingProxy bool, extraHeaders Header, waitForContinue func() bool) (err error) { + trace := httptrace.ContextClientTrace(r.Context()) + if trace != nil && trace.WroteRequest != nil { + defer func() { + trace.WroteRequest(httptrace.WroteRequestInfo{ + Err: err, + }) + }() + } + closed := false + defer func() { + if closed { + return + } + if closeErr := r.closeBody(); closeErr != nil && err == nil { + err = closeErr + } + }() + + // Find the target host. Prefer the Host: header, but if that + // is not given, use the host from the request URL. + // + // Clean the host, in case it arrives with unexpected stuff in it. + host := r.Host + if host == "" { + if r.URL == nil { + return errMissingHost + } + host = r.URL.Host + } + host, err = httpguts.PunycodeHostPort(host) + if err != nil { + return err + } + // Validate that the Host header is a valid header in general, + // but don't validate the host itself. This is sufficient to avoid + // header or request smuggling via the Host field. + // The server can (and will, if it's a net/http server) reject + // the request if it doesn't consider the host valid. + if !httpguts.ValidHostHeader(host) { + // Historically, we would truncate the Host header after '/' or ' '. + // Some users have relied on this truncation to convert a network + // address such as Unix domain socket path into a valid, ignored + // Host header (see https://go.dev/issue/61431). + // + // We don't preserve the truncation, because sending an altered + // header field opens a smuggling vector. Instead, zero out the + // Host header entirely if it isn't valid. (An empty Host is valid; + // see RFC 9112 Section 3.2.) + // + // Return an error if we're sending to a proxy, since the proxy + // probably can't do anything useful with an empty Host header. + if !usingProxy { + host = "" + } else { + return errors.New("http: invalid Host header") + } + } + + // According to RFC 6874, an HTTP client, proxy, or other + // intermediary must remove any IPv6 zone identifier attached + // to an outgoing URI. + host = removeZone(host) + + ruri := r.URL.RequestURI() + if usingProxy && r.URL.Scheme != "" && r.URL.Opaque == "" { + ruri = r.URL.Scheme + "://" + host + ruri + } else if r.Method == "CONNECT" && r.URL.Path == "" { + // CONNECT requests normally give just the host and port, not a full URL. + ruri = host + if r.URL.Opaque != "" { + ruri = r.URL.Opaque + } + } + if stringContainsCTLByte(ruri) { + return errors.New("net/http: can't write control character in Request.URL") + } + // TODO: validate r.Method too? At least it's less likely to + // come from an attacker (more likely to be a constant in + // code). + + // Wrap the writer in a bufio Writer if it's not already buffered. + // Don't always call NewWriter, as that forces a bytes.Buffer + // and other small bufio Writers to have a minimum 4k buffer + // size. + var bw *bufio.Writer + if _, ok := w.(io.ByteWriter); !ok { + bw = bufio.NewWriter(w) + w = bw + } + + _, err = fmt.Fprintf(w, "%s %s HTTP/1.1\r\n", valueOrDefault(r.Method, "GET"), ruri) + if err != nil { + return err + } + + // Header lines + _, err = fmt.Fprintf(w, "Host: %s\r\n", host) + if err != nil { + return err + } + if trace != nil && trace.WroteHeaderField != nil { + trace.WroteHeaderField("Host", []string{host}) + } + + // Use the defaultUserAgent unless the Header contains one, which + // may be blank to not send the header. + userAgent := defaultUserAgent + + if !r.Header.has("User-Agent") && !r.Header.has("user-agent") { + _, err = fmt.Fprintf(w, "User-Agent: %s\r\n", userAgent) + if err != nil { + return err + } + } + + if trace != nil && trace.WroteHeaderField != nil { + trace.WroteHeaderField("User-Agent", []string{userAgent}) + } + + // Process Body,ContentLength,Close,Trailer + tw, err := newTransferWriter(r) + if err != nil { + return err + } + err = tw.writeHeader(w, trace) + if err != nil { + return err + } + + err = r.Header.writeSubset(w, reqWriteExcludeHeader, trace) + if err != nil { + return err + } + + if extraHeaders != nil { + err = extraHeaders.write(w, trace) + if err != nil { + return err + } + } + + _, err = io.WriteString(w, "\r\n") + if err != nil { + return err + } + + if trace != nil && trace.WroteHeaders != nil { + trace.WroteHeaders() + } + + // Flush and wait for 100-continue if expected. + if waitForContinue != nil { + if bw, ok := w.(*bufio.Writer); ok { + err = bw.Flush() + if err != nil { + return err + } + } + if trace != nil && trace.Wait100Continue != nil { + trace.Wait100Continue() + } + if !waitForContinue() { + closed = true + r.closeBody() + return nil + } + } + + if bw, ok := w.(*bufio.Writer); ok && tw.FlushHeaders { + if err := bw.Flush(); err != nil { + return err + } + } + + // Write body and trailer + closed = true + err = tw.writeBody(w) + if err != nil { + if tw.bodyReadError == err { + err = requestBodyReadError{err} + } + return err + } + + if bw != nil { + return bw.Flush() + } + return nil +} + +// requestBodyReadError wraps an error from (*Request).write to indicate +// that the error came from a Read call on the Request.Body. +// This error type should not escape the net/http package to users. +type requestBodyReadError struct{ error } + +func idnaASCII(v string) (string, error) { + // TODO: Consider removing this check after verifying performance is okay. + // Right now punycode verification, length checks, context checks, and the + // permissible character tests are all omitted. It also prevents the ToASCII + // call from salvaging an invalid IDN, when possible. As a result it may be + // possible to have two IDNs that appear identical to the user where the + // ASCII-only version causes an error downstream whereas the non-ASCII + // version does not. + // Note that for correct ASCII IDNs ToASCII will only do considerably more + // work, but it will not cause an allocation. + if ascii.Is(v) { + return v, nil + } + return idna.Lookup.ToASCII(v) +} + +// removeZone removes IPv6 zone identifier from host. +// E.g., "[fe80::1%en0]:8080" to "[fe80::1]:8080" +func removeZone(host string) string { + if !strings.HasPrefix(host, "[") { + return host + } + i := strings.LastIndex(host, "]") + if i < 0 { + return host + } + j := strings.LastIndex(host[:i], "%") + if j < 0 { + return host + } + return host[:j] + host[i:] +} + +// ParseHTTPVersion parses an HTTP version string according to RFC 7230, section 2.6. +// "HTTP/1.0" returns (1, 0, true). Note that strings without +// a minor version, such as "HTTP/2", are not valid. +func ParseHTTPVersion(vers string) (major, minor int, ok bool) { + switch vers { + case "HTTP/1.1": + return 1, 1, true + case "HTTP/1.0": + return 1, 0, true + } + if !strings.HasPrefix(vers, "HTTP/") { + return 0, 0, false + } + if len(vers) != len("HTTP/X.Y") { + return 0, 0, false + } + if vers[6] != '.' { + return 0, 0, false + } + maj, err := strconv.ParseUint(vers[5:6], 10, 0) + if err != nil { + return 0, 0, false + } + min, err := strconv.ParseUint(vers[7:8], 10, 0) + if err != nil { + return 0, 0, false + } + return int(maj), int(min), true +} + +func validMethod(method string) bool { + /* + Method = "OPTIONS" ; Section 9.2 + | "GET" ; Section 9.3 + | "HEAD" ; Section 9.4 + | "POST" ; Section 9.5 + | "PUT" ; Section 9.6 + | "DELETE" ; Section 9.7 + | "TRACE" ; Section 9.8 + | "CONNECT" ; Section 9.9 + | extension-method + extension-method = token + token = 1* + */ + return isToken(method) +} + +// NewRequest wraps [NewRequestWithContext] using [context.Background]. +func NewRequest(method, url string, body io.Reader) (*Request, error) { + return NewRequestWithContext(context.Background(), method, url, body) +} + +// NewRequestWithContext returns a new [Request] given a method, URL, and +// optional body. +// +// If the provided body is also an [io.Closer], the returned +// [Request.Body] is set to body and will be closed (possibly +// asynchronously) by the Client methods Do, Post, and PostForm, +// and [Transport.RoundTrip]. +// +// NewRequestWithContext returns a Request suitable for use with +// [Client.Do] or [Transport.RoundTrip]. To create a request for use with +// testing a Server Handler, either use the [net/http/httptest.NewRequest] function, +// use [ReadRequest], or manually update the Request fields. +// For an outgoing client request, the context +// controls the entire lifetime of a request and its response: +// obtaining a connection, sending the request, and reading the +// response headers and body. See the [Request] type's documentation for +// the difference between inbound and outbound request fields. +// +// If body is of type [*bytes.Buffer], [*bytes.Reader], or +// [*strings.Reader], the returned request's ContentLength is set to its +// exact value (instead of -1), GetBody is populated (so 307 and 308 +// redirects can replay the body), and Body is set to [NoBody] if the +// ContentLength is 0. +func NewRequestWithContext(ctx context.Context, method, url string, body io.Reader) (*Request, error) { + if method == "" { + // We document that "" means "GET" for Request.Method, and people have + // relied on that from NewRequest, so keep that working. + // We still enforce validMethod for non-empty methods. + method = "GET" + } + if !validMethod(method) { + return nil, fmt.Errorf("net/http: invalid method %q", method) + } + if ctx == nil { + return nil, errors.New("net/http: nil Context") + } + u, err := urlpkg.Parse(url) + if err != nil { + return nil, err + } + rc, ok := body.(io.ReadCloser) + if !ok && body != nil { + rc = io.NopCloser(body) + } + // The host's colon:port should be normalized. See Issue 14836. + u.Host = removeEmptyPort(u.Host) + req := &Request{ + ctx: ctx, + Method: method, + URL: u, + Proto: "HTTP/1.1", + ProtoMajor: 1, + ProtoMinor: 1, + Header: make(Header), + Body: rc, + Host: u.Host, + } + if body != nil { + switch v := body.(type) { + case *bytes.Buffer: + req.ContentLength = int64(v.Len()) + buf := v.Bytes() + req.GetBody = func() (io.ReadCloser, error) { + r := bytes.NewReader(buf) + return io.NopCloser(r), nil + } + case *bytes.Reader: + req.ContentLength = int64(v.Len()) + snapshot := *v + req.GetBody = func() (io.ReadCloser, error) { + r := snapshot + return io.NopCloser(&r), nil + } + case *strings.Reader: + req.ContentLength = int64(v.Len()) + snapshot := *v + req.GetBody = func() (io.ReadCloser, error) { + r := snapshot + return io.NopCloser(&r), nil + } + default: + // This is where we'd set it to -1 (at least + // if body != NoBody) to mean unknown, but + // that broke people during the Go 1.8 testing + // period. People depend on it being 0 I + // guess. Maybe retry later. See Issue 18117. + } + // For client requests, Request.ContentLength of 0 + // means either actually 0, or unknown. The only way + // to explicitly say that the ContentLength is zero is + // to set the Body to nil. But turns out too much code + // depends on NewRequest returning a non-nil Body, + // so we use a well-known ReadCloser variable instead + // and have the http package also treat that sentinel + // variable to mean explicitly zero. + if req.GetBody != nil && req.ContentLength == 0 { + req.Body = NoBody + req.GetBody = func() (io.ReadCloser, error) { return NoBody, nil } + } + } + + return req, nil +} + +// BasicAuth returns the username and password provided in the request's +// Authorization header, if the request uses HTTP Basic Authentication. +// See RFC 2617, Section 2. +func (r *Request) BasicAuth() (username, password string, ok bool) { + auth := r.Header.Get("Authorization") + if auth == "" { + return "", "", false + } + return parseBasicAuth(auth) +} + +// parseBasicAuth parses an HTTP Basic Authentication string. +// "Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==" returns ("Aladdin", "open sesame", true). +// +// parseBasicAuth should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/sagernet/sing +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname parseBasicAuth +func parseBasicAuth(auth string) (username, password string, ok bool) { + const prefix = "Basic " + // Case insensitive prefix match. See Issue 22736. + if len(auth) < len(prefix) || !ascii.EqualFold(auth[:len(prefix)], prefix) { + return "", "", false + } + c, err := base64.StdEncoding.DecodeString(auth[len(prefix):]) + if err != nil { + return "", "", false + } + cs := string(c) + username, password, ok = strings.Cut(cs, ":") + if !ok { + return "", "", false + } + return username, password, true +} + +// SetBasicAuth sets the request's Authorization header to use HTTP +// Basic Authentication with the provided username and password. +// +// With HTTP Basic Authentication the provided username and password +// are not encrypted. It should generally only be used in an HTTPS +// request. +// +// The username may not contain a colon. Some protocols may impose +// additional requirements on pre-escaping the username and +// password. For instance, when used with OAuth2, both arguments must +// be URL encoded first with [url.QueryEscape]. +func (r *Request) SetBasicAuth(username, password string) { + r.Header.Set("Authorization", "Basic "+basicAuth(username, password)) +} + +// parseRequestLine parses "GET /foo HTTP/1.1" into its three parts. +func parseRequestLine(line string) (method, requestURI, proto string, ok bool) { + method, rest, ok1 := strings.Cut(line, " ") + requestURI, proto, ok2 := strings.Cut(rest, " ") + if !ok1 || !ok2 { + return "", "", "", false + } + return method, requestURI, proto, true +} + +var textprotoReaderPool sync.Pool + +func newTextprotoReader(br *bufio.Reader) *textproto.Reader { + if v := textprotoReaderPool.Get(); v != nil { + tr := v.(*textproto.Reader) + tr.R = br + return tr + } + return textproto.NewReader(br) +} + +func putTextprotoReader(r *textproto.Reader) { + r.R = nil + textprotoReaderPool.Put(r) +} + +// ReadRequest reads and parses an incoming request from b. +// +// ReadRequest is a low-level function and should only be used for +// specialized applications; most code should use the [Server] to read +// requests and handle them via the [Handler] interface. ReadRequest +// only supports HTTP/1.x requests. For HTTP/2, use golang.org/x/net/http2. +func ReadRequest(b *bufio.Reader) (*Request, error) { + req, err := readRequest(b) + if err != nil { + return nil, err + } + + delete(req.Header, "Host") + return req, nil +} + +// readRequest should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/sagernet/sing +// - github.com/v2fly/v2ray-core/v4 +// - github.com/v2fly/v2ray-core/v5 +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname readRequest +func readRequest(b *bufio.Reader) (req *Request, err error) { + tp := newTextprotoReader(b) + defer putTextprotoReader(tp) + + req = new(Request) + + // First line: GET /index.html HTTP/1.0 + var s string + if s, err = tp.ReadLine(); err != nil { + return nil, err + } + defer func() { + if err == io.EOF { + err = io.ErrUnexpectedEOF + } + }() + + var ok bool + req.Method, req.RequestURI, req.Proto, ok = parseRequestLine(s) + if !ok { + return nil, badStringError("malformed HTTP request", s) + } + if !validMethod(req.Method) { + return nil, badStringError("invalid method", req.Method) + } + rawurl := req.RequestURI + if req.ProtoMajor, req.ProtoMinor, ok = ParseHTTPVersion(req.Proto); !ok { + return nil, badStringError("malformed HTTP version", req.Proto) + } + + // CONNECT requests are used two different ways, and neither uses a full URL: + // The standard use is to tunnel HTTPS through an HTTP proxy. + // It looks like "CONNECT www.google.com:443 HTTP/1.1", and the parameter is + // just the authority section of a URL. This information should go in req.URL.Host. + // + // The net/rpc package also uses CONNECT, but there the parameter is a path + // that starts with a slash. It can be parsed with the regular URL parser, + // and the path will end up in req.URL.Path, where it needs to be in order for + // RPC to work. + justAuthority := req.Method == "CONNECT" && !strings.HasPrefix(rawurl, "/") + if justAuthority { + rawurl = "http://" + rawurl + } + + if req.URL, err = url.ParseRequestURI(rawurl); err != nil { + return nil, err + } + + if justAuthority { + // Strip the bogus "http://" back off. + req.URL.Scheme = "" + } + + // Subsequent lines: Key: value. + mimeHeader, err := tp.ReadMIMEHeader() + if err != nil { + return nil, err + } + req.Header = Header(mimeHeader) + if len(req.Header["Host"]) > 1 { + return nil, fmt.Errorf("too many Host headers") + } + + // RFC 7230, section 5.3: Must treat + // GET /index.html HTTP/1.1 + // Host: www.google.com + // and + // GET http://www.google.com/index.html HTTP/1.1 + // Host: doesntmatter + // the same. In the second case, any Host line is ignored. + req.Host = req.URL.Host + if req.Host == "" { + req.Host = req.Header.get("Host") + } + + fixPragmaCacheControl(req.Header) + + req.Close = shouldClose(req.ProtoMajor, req.ProtoMinor, req.Header, false) + + err = readTransfer(req, b) + if err != nil { + return nil, err + } + + if req.isH2Upgrade() { + // Because it's neither chunked, nor declared: + req.ContentLength = -1 + + // We want to give handlers a chance to hijack the + // connection, but we need to prevent the Server from + // dealing with the connection further if it's not + // hijacked. Set Close to ensure that: + req.Close = true + } + return req, nil +} + +// MaxBytesReader is similar to [io.LimitReader] but is intended for +// limiting the size of incoming request bodies. In contrast to +// io.LimitReader, MaxBytesReader's result is a ReadCloser, returns a +// non-nil error of type [*MaxBytesError] for a Read beyond the limit, +// and closes the underlying reader when its Close method is called. +// +// MaxBytesReader prevents clients from accidentally or maliciously +// sending a large request and wasting server resources. If possible, +// it tells the [ResponseWriter] to close the connection after the limit +// has been reached. +func MaxBytesReader(w ResponseWriter, r io.ReadCloser, n int64) io.ReadCloser { + if n < 0 { // Treat negative limits as equivalent to 0. + n = 0 + } + return &maxBytesReader{w: w, r: r, i: n, n: n} +} + +// MaxBytesError is returned by [MaxBytesReader] when its read limit is exceeded. +type MaxBytesError struct { + Limit int64 +} + +func (e *MaxBytesError) Error() string { + // Due to Hyrum's law, this text cannot be changed. + return "http: request body too large" +} + +type maxBytesReader struct { + w ResponseWriter + r io.ReadCloser // underlying reader + i int64 // max bytes initially, for MaxBytesError + n int64 // max bytes remaining + err error // sticky error +} + +func (l *maxBytesReader) Read(p []byte) (n int, err error) { + if l.err != nil { + return 0, l.err + } + if len(p) == 0 { + return 0, nil + } + // If they asked for a 32KB byte read but only 5 bytes are + // remaining, no need to read 32KB. 6 bytes will answer the + // question of the whether we hit the limit or go past it. + // 0 < len(p) < 2^63 + if int64(len(p))-1 > l.n { + p = p[:l.n+1] + } + n, err = l.r.Read(p) + + if int64(n) <= l.n { + l.n -= int64(n) + l.err = err + return n, err + } + + n = int(l.n) + l.n = 0 + + // The server code and client code both use + // maxBytesReader. This "requestTooLarge" check is + // only used by the server code. To prevent binaries + // which only using the HTTP Client code (such as + // cmd/go) from also linking in the HTTP server, don't + // use a static type assertion to the server + // "*response" type. Check this interface instead: + type requestTooLarger interface { + requestTooLarge() + } + if res, ok := l.w.(requestTooLarger); ok { + res.requestTooLarge() + } + l.err = &MaxBytesError{l.i} + return n, l.err +} + +func (l *maxBytesReader) Close() error { + return l.r.Close() +} + +func copyValues(dst, src url.Values) { + for k, vs := range src { + dst[k] = append(dst[k], vs...) + } +} + +func parsePostForm(r *Request) (vs url.Values, err error) { + if r.Body == nil { + err = errors.New("missing form body") + return + } + ct := r.Header.Get("Content-Type") + // RFC 7231, section 3.1.1.5 - empty type + // MAY be treated as application/octet-stream + if ct == "" { + ct = "application/octet-stream" + } + ct, _, err = mime.ParseMediaType(ct) + switch { + case ct == "application/x-www-form-urlencoded": + var reader io.Reader = r.Body + maxFormSize := int64(1<<63 - 1) + if _, ok := r.Body.(*maxBytesReader); !ok { + maxFormSize = int64(10 << 20) // 10 MB is a lot of text. + reader = io.LimitReader(r.Body, maxFormSize+1) + } + b, e := io.ReadAll(reader) + if e != nil { + if err == nil { + err = e + } + break + } + if int64(len(b)) > maxFormSize { + err = errors.New("http: POST too large") + return + } + vs, e = url.ParseQuery(string(b)) + if err == nil { + err = e + } + case ct == "multipart/form-data": + // handled by ParseMultipartForm (which is calling us, or should be) + // TODO(bradfitz): there are too many possible + // orders to call too many functions here. + // Clean this up and write more tests. + // request_test.go contains the start of this, + // in TestParseMultipartFormOrder and others. + } + return +} + +// ParseForm populates r.Form and r.PostForm. +// +// For all requests, ParseForm parses the raw query from the URL and updates +// r.Form. +// +// For POST, PUT, and PATCH requests, it also reads the request body, parses it +// as a form and puts the results into both r.PostForm and r.Form. Request body +// parameters take precedence over URL query string values in r.Form. +// +// If the request Body's size has not already been limited by [MaxBytesReader], +// the size is capped at 10MB. +// +// For other HTTP methods, or when the Content-Type is not +// application/x-www-form-urlencoded, the request Body is not read, and +// r.PostForm is initialized to a non-nil, empty value. +// +// [Request.ParseMultipartForm] calls ParseForm automatically. +// ParseForm is idempotent. +func (r *Request) ParseForm() error { + var err error + if r.PostForm == nil { + if r.Method == "POST" || r.Method == "PUT" || r.Method == "PATCH" { + r.PostForm, err = parsePostForm(r) + } + if r.PostForm == nil { + r.PostForm = make(url.Values) + } + } + if r.Form == nil { + if len(r.PostForm) > 0 { + r.Form = make(url.Values) + copyValues(r.Form, r.PostForm) + } + var newValues url.Values + if r.URL != nil { + var e error + newValues, e = url.ParseQuery(r.URL.RawQuery) + if err == nil { + err = e + } + } + if newValues == nil { + newValues = make(url.Values) + } + if r.Form == nil { + r.Form = newValues + } else { + copyValues(r.Form, newValues) + } + } + return err +} + +// ParseMultipartForm parses a request body as multipart/form-data. +// The whole request body is parsed and up to a total of maxMemory bytes of +// its file parts are stored in memory, with the remainder stored on +// disk in temporary files. +// ParseMultipartForm calls [Request.ParseForm] if necessary. +// If ParseForm returns an error, ParseMultipartForm returns it but also +// continues parsing the request body. +// After one call to ParseMultipartForm, subsequent calls have no effect. +func (r *Request) ParseMultipartForm(maxMemory int64) error { + if r.MultipartForm == multipartByReader { + return errors.New("http: multipart handled by MultipartReader") + } + var parseFormErr error + if r.Form == nil { + // Let errors in ParseForm fall through, and just + // return it at the end. + parseFormErr = r.ParseForm() + } + if r.MultipartForm != nil { + return nil + } + + mr, err := r.multipartReader(false) + if err != nil { + return err + } + + f, err := mr.ReadForm(maxMemory) + if err != nil { + return err + } + + if r.PostForm == nil { + r.PostForm = make(url.Values) + } + for k, v := range f.Value { + r.Form[k] = append(r.Form[k], v...) + // r.PostForm should also be populated. See Issue 9305. + r.PostForm[k] = append(r.PostForm[k], v...) + } + + r.MultipartForm = f + + return parseFormErr +} + +// FormValue returns the first value for the named component of the query. +// The precedence order: +// 1. application/x-www-form-urlencoded form body (POST, PUT, PATCH only) +// 2. query parameters (always) +// 3. multipart/form-data form body (always) +// +// FormValue calls [Request.ParseMultipartForm] and [Request.ParseForm] +// if necessary and ignores any errors returned by these functions. +// If key is not present, FormValue returns the empty string. +// To access multiple values of the same key, call ParseForm and +// then inspect [Request.Form] directly. +func (r *Request) FormValue(key string) string { + if r.Form == nil { + r.ParseMultipartForm(defaultMaxMemory) + } + if vs := r.Form[key]; len(vs) > 0 { + return vs[0] + } + return "" +} + +// PostFormValue returns the first value for the named component of the POST, +// PUT, or PATCH request body. URL query parameters are ignored. +// PostFormValue calls [Request.ParseMultipartForm] and [Request.ParseForm] if necessary and ignores +// any errors returned by these functions. +// If key is not present, PostFormValue returns the empty string. +func (r *Request) PostFormValue(key string) string { + if r.PostForm == nil { + r.ParseMultipartForm(defaultMaxMemory) + } + if vs := r.PostForm[key]; len(vs) > 0 { + return vs[0] + } + return "" +} + +// FormFile returns the first file for the provided form key. +// FormFile calls [Request.ParseMultipartForm] and [Request.ParseForm] if necessary. +func (r *Request) FormFile(key string) (multipart.File, *multipart.FileHeader, error) { + if r.MultipartForm == multipartByReader { + return nil, nil, errors.New("http: multipart handled by MultipartReader") + } + if r.MultipartForm == nil { + err := r.ParseMultipartForm(defaultMaxMemory) + if err != nil { + return nil, nil, err + } + } + if r.MultipartForm != nil && r.MultipartForm.File != nil { + if fhs := r.MultipartForm.File[key]; len(fhs) > 0 { + f, err := fhs[0].Open() + return f, fhs[0], err + } + } + return nil, nil, ErrMissingFile +} + +// PathValue returns the value for the named path wildcard in the [ServeMux] pattern +// that matched the request. +// It returns the empty string if the request was not matched against a pattern +// or there is no such wildcard in the pattern. +func (r *Request) PathValue(name string) string { + if i := r.patIndex(name); i >= 0 { + return r.matches[i] + } + return r.otherValues[name] +} + +// SetPathValue sets name to value, so that subsequent calls to r.PathValue(name) +// return value. +func (r *Request) SetPathValue(name, value string) { + if i := r.patIndex(name); i >= 0 { + r.matches[i] = value + } else { + if r.otherValues == nil { + r.otherValues = map[string]string{} + } + r.otherValues[name] = value + } +} + +// patIndex returns the index of name in the list of named wildcards of the +// request's pattern, or -1 if there is no such name. +func (r *Request) patIndex(name string) int { + // The linear search seems expensive compared to a map, but just creating the map + // takes a lot of time, and most patterns will just have a couple of wildcards. + if r.pat == nil { + return -1 + } + i := 0 + for _, seg := range r.pat.segments { + if seg.wild && seg.s != "" { + if name == seg.s { + return i + } + i++ + } + } + return -1 +} + +func (r *Request) expectsContinue() bool { + return hasToken(r.Header.get("Expect"), "100-continue") +} + +func (r *Request) wantsHttp10KeepAlive() bool { + if r.ProtoMajor != 1 || r.ProtoMinor != 0 { + return false + } + return hasToken(r.Header.get("Connection"), "keep-alive") +} + +func (r *Request) wantsClose() bool { + if r.Close { + return true + } + return hasToken(r.Header.get("Connection"), "close") +} + +func (r *Request) closeBody() error { + if r.Body == nil { + return nil + } + return r.Body.Close() +} + +func (r *Request) isReplayable() bool { + if r.Body == nil || r.Body == NoBody || r.GetBody != nil { + switch valueOrDefault(r.Method, "GET") { + case "GET", "HEAD", "OPTIONS", "TRACE": + return true + } + // The Idempotency-Key, while non-standard, is widely used to + // mean a POST or other request is idempotent. See + // https://golang.org/issue/19943#issuecomment-421092421 + if r.Header.has("Idempotency-Key") || r.Header.has("X-Idempotency-Key") { + return true + } + } + return false +} + +// outgoingLength reports the Content-Length of this outgoing (Client) request. +// It maps 0 into -1 (unknown) when the Body is non-nil. +func (r *Request) outgoingLength() int64 { + if r.Body == nil || r.Body == NoBody { + return 0 + } + if r.ContentLength != 0 { + return r.ContentLength + } + return -1 +} + +// requestMethodUsuallyLacksBody reports whether the given request +// method is one that typically does not involve a request body. +// This is used by the Transport (via +// transferWriter.shouldSendChunkedRequestBody) to determine whether +// we try to test-read a byte from a non-nil Request.Body when +// Request.outgoingLength() returns -1. See the comments in +// shouldSendChunkedRequestBody. +func requestMethodUsuallyLacksBody(method string) bool { + switch method { + case "GET", "HEAD", "DELETE", "OPTIONS", "PROPFIND", "SEARCH": + return true + } + return false +} + +// requiresHTTP1 reports whether this request requires being sent on +// an HTTP/1 connection. +func (r *Request) requiresHTTP1() bool { + return hasToken(r.Header.Get("Connection"), "upgrade") && + ascii.EqualFold(r.Header.Get("Upgrade"), "websocket") +} diff --git a/backend/vendor/github.com/enetx/http/response.go b/backend/vendor/github.com/enetx/http/response.go new file mode 100644 index 0000000..0c3d7f6 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/response.go @@ -0,0 +1,371 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// HTTP Response reading and parsing. + +package http + +import ( + "bufio" + "bytes" + "crypto/tls" + "errors" + "fmt" + "io" + "net/textproto" + "net/url" + "strconv" + "strings" + + "golang.org/x/net/http/httpguts" +) + +var respExcludeHeader = map[string]bool{ + "Content-Length": true, + "Transfer-Encoding": true, + "Trailer": true, +} + +// Response represents the response from an HTTP request. +// +// The [Client] and [Transport] return Responses from servers once +// the response headers have been received. The response body +// is streamed on demand as the Body field is read. +type Response struct { + Status string // e.g. "200 OK" + StatusCode int // e.g. 200 + Proto string // e.g. "HTTP/1.0" + ProtoMajor int // e.g. 1 + ProtoMinor int // e.g. 0 + + // Header maps header keys to values. If the response had multiple + // headers with the same key, they may be concatenated, with comma + // delimiters. (RFC 7230, section 3.2.2 requires that multiple headers + // be semantically equivalent to a comma-delimited sequence.) When + // Header values are duplicated by other fields in this struct (e.g., + // ContentLength, TransferEncoding, Trailer), the field values are + // authoritative. + // + // Keys in the map are canonicalized (see CanonicalHeaderKey). + Header Header + + // Body represents the response body. + // + // The response body is streamed on demand as the Body field + // is read. If the network connection fails or the server + // terminates the response, Body.Read calls return an error. + // + // The http Client and Transport guarantee that Body is always + // non-nil, even on responses without a body or responses with + // a zero-length body. It is the caller's responsibility to + // close Body. The default HTTP client's Transport may not + // reuse HTTP/1.x "keep-alive" TCP connections if the Body is + // not read to completion and closed. + // + // The Body is automatically dechunked if the server replied + // with a "chunked" Transfer-Encoding. + // + // As of Go 1.12, the Body will also implement io.Writer + // on a successful "101 Switching Protocols" response, + // as used by WebSockets and HTTP/2's "h2c" mode. + Body io.ReadCloser + + // ContentLength records the length of the associated content. The + // value -1 indicates that the length is unknown. Unless Request.Method + // is "HEAD", values >= 0 indicate that the given number of bytes may + // be read from Body. + ContentLength int64 + + // Contains transfer encodings from outer-most to inner-most. Value is + // nil, means that "identity" encoding is used. + TransferEncoding []string + + // Close records whether the header directed that the connection be + // closed after reading Body. The value is advice for clients: neither + // ReadResponse nor Response.Write ever closes a connection. + Close bool + + // Uncompressed reports whether the response was sent compressed but + // was decompressed by the http package. When true, reading from + // Body yields the uncompressed content instead of the compressed + // content actually set from the server, ContentLength is set to -1, + // and the "Content-Length" and "Content-Encoding" fields are deleted + // from the responseHeader. To get the original response from + // the server, set Transport.DisableCompression to true. + Uncompressed bool + + // Trailer maps trailer keys to values in the same + // format as Header. + // + // The Trailer initially contains only nil values, one for + // each key specified in the server's "Trailer" header + // value. Those values are not added to Header. + // + // Trailer must not be accessed concurrently with Read calls + // on the Body. + // + // After Body.Read has returned io.EOF, Trailer will contain + // any trailer values sent by the server. + Trailer Header + + // Request is the request that was sent to obtain this Response. + // Request's Body is nil (having already been consumed). + // This is only populated for Client requests. + Request *Request + + // TLS contains information about the TLS connection on which the + // response was received. It is nil for unencrypted responses. + // The pointer is shared between responses and should not be + // modified. + TLS *tls.ConnectionState +} + +// Cookies parses and returns the cookies set in the Set-Cookie headers. +func (r *Response) Cookies() []*Cookie { + return readSetCookies(r.Header) +} + +// ErrNoLocation is returned by the [Response.Location] method +// when no Location header is present. +var ErrNoLocation = errors.New("http: no Location header in response") + +// Location returns the URL of the response's "Location" header, +// if present. Relative redirects are resolved relative to +// [Response.Request]. [ErrNoLocation] is returned if no +// Location header is present. +func (r *Response) Location() (*url.URL, error) { + lv := r.Header.Get("Location") + if lv == "" { + return nil, ErrNoLocation + } + if r.Request != nil && r.Request.URL != nil { + return r.Request.URL.Parse(lv) + } + return url.Parse(lv) +} + +// ReadResponse reads and returns an HTTP response from r. +// The req parameter optionally specifies the [Request] that corresponds +// to this [Response]. If nil, a GET request is assumed. +// Clients must call resp.Body.Close when finished reading resp.Body. +// After that call, clients can inspect resp.Trailer to find key/value +// pairs included in the response trailer. +func ReadResponse(r *bufio.Reader, req *Request) (*Response, error) { + tp := textproto.NewReader(r) + resp := &Response{ + Request: req, + } + + // Parse the first line of the response. + line, err := tp.ReadLine() + if err != nil { + if err == io.EOF { + err = io.ErrUnexpectedEOF + } + return nil, err + } + proto, status, ok := strings.Cut(line, " ") + if !ok { + return nil, badStringError("malformed HTTP response", line) + } + resp.Proto = proto + resp.Status = strings.TrimLeft(status, " ") + + statusCode, _, _ := strings.Cut(resp.Status, " ") + if len(statusCode) != 3 { + return nil, badStringError("malformed HTTP status code", statusCode) + } + resp.StatusCode, err = strconv.Atoi(statusCode) + if err != nil || resp.StatusCode < 0 { + return nil, badStringError("malformed HTTP status code", statusCode) + } + if resp.ProtoMajor, resp.ProtoMinor, ok = ParseHTTPVersion(resp.Proto); !ok { + return nil, badStringError("malformed HTTP version", resp.Proto) + } + + // Parse the response headers. + mimeHeader, err := tp.ReadMIMEHeader() + if err != nil { + if err == io.EOF { + err = io.ErrUnexpectedEOF + } + return nil, err + } + resp.Header = Header(mimeHeader) + + fixPragmaCacheControl(resp.Header) + + err = readTransfer(resp, r) + if err != nil { + return nil, err + } + + return resp, nil +} + +// RFC 7234, section 5.4: Should treat +// +// Pragma: no-cache +// +// like +// +// Cache-Control: no-cache +func fixPragmaCacheControl(header Header) { + if hp, ok := header["Pragma"]; ok && len(hp) > 0 && hp[0] == "no-cache" { + if _, presentcc := header["Cache-Control"]; !presentcc { + header["Cache-Control"] = []string{"no-cache"} + } + } +} + +// ProtoAtLeast reports whether the HTTP protocol used +// in the response is at least major.minor. +func (r *Response) ProtoAtLeast(major, minor int) bool { + return r.ProtoMajor > major || + r.ProtoMajor == major && r.ProtoMinor >= minor +} + +// Write writes r to w in the HTTP/1.x server response format, +// including the status line, headers, body, and optional trailer. +// +// This method consults the following fields of the response r: +// +// StatusCode +// ProtoMajor +// ProtoMinor +// Request.Method +// TransferEncoding +// Trailer +// Body +// ContentLength +// Header, values for non-canonical keys will have unpredictable behavior +// +// The Response Body is closed after it is sent. +func (r *Response) Write(w io.Writer) error { + // Status line + text := r.Status + if text == "" { + text = StatusText(r.StatusCode) + if text == "" { + text = "status code " + strconv.Itoa(r.StatusCode) + } + } else { + // Just to reduce stutter, if user set r.Status to "200 OK" and StatusCode to 200. + // Not important. + text = strings.TrimPrefix(text, strconv.Itoa(r.StatusCode)+" ") + } + + if _, err := fmt.Fprintf(w, "HTTP/%d.%d %03d %s\r\n", r.ProtoMajor, r.ProtoMinor, r.StatusCode, text); err != nil { + return err + } + + // Clone it, so we can modify r1 as needed. + r1 := new(Response) + *r1 = *r + if r1.ContentLength == 0 && r1.Body != nil { + // Is it actually 0 length? Or just unknown? + var buf [1]byte + n, err := r1.Body.Read(buf[:]) + if err != nil && err != io.EOF { + return err + } + if n == 0 { + // Reset it to a known zero reader, in case underlying one + // is unhappy being read repeatedly. + r1.Body = NoBody + } else { + r1.ContentLength = -1 + r1.Body = struct { + io.Reader + io.Closer + }{ + io.MultiReader(bytes.NewReader(buf[:1]), r.Body), + r.Body, + } + } + } + // If we're sending a non-chunked HTTP/1.1 response without a + // content-length, the only way to do that is the old HTTP/1.0 + // way, by noting the EOF with a connection close, so we need + // to set Close. + if r1.ContentLength == -1 && !r1.Close && r1.ProtoAtLeast(1, 1) && !chunked(r1.TransferEncoding) && !r1.Uncompressed { + r1.Close = true + } + + // Process Body,ContentLength,Close,Trailer + tw, err := newTransferWriter(r1) + if err != nil { + return err + } + err = tw.writeHeader(w, nil) + if err != nil { + return err + } + + // Rest of header + err = r.Header.WriteSubset(w, respExcludeHeader) + if err != nil { + return err + } + + // contentLengthAlreadySent may have been already sent for + // POST/PUT requests, even if zero length. See Issue 8180. + contentLengthAlreadySent := tw.shouldSendContentLength() + if r1.ContentLength == 0 && !chunked(r1.TransferEncoding) && !contentLengthAlreadySent && bodyAllowedForStatus(r.StatusCode) { + if _, err := io.WriteString(w, "Content-Length: 0\r\n"); err != nil { + return err + } + } + + // End-of-header + if _, err := io.WriteString(w, "\r\n"); err != nil { + return err + } + + // Write body and trailer + err = tw.writeBody(w) + if err != nil { + return err + } + + // Success + return nil +} + +func (r *Response) closeBody() { + if r.Body != nil { + r.Body.Close() + } +} + +// bodyIsWritable reports whether the Body supports writing. The +// Transport returns Writable bodies for 101 Switching Protocols +// responses. +// The Transport uses this method to determine whether a persistent +// connection is done being managed from its perspective. Once we +// return a writable response body to a user, the net/http package is +// done managing that connection. +func (r *Response) bodyIsWritable() bool { + _, ok := r.Body.(io.Writer) + return ok +} + +// isProtocolSwitch reports whether the response code and header +// indicate a successful protocol upgrade response. +func (r *Response) isProtocolSwitch() bool { + return isProtocolSwitchResponse(r.StatusCode, r.Header) +} + +// isProtocolSwitchResponse reports whether the response code and +// response header indicate a successful protocol upgrade response. +func isProtocolSwitchResponse(code int, h Header) bool { + return code == StatusSwitchingProtocols && isProtocolSwitchHeader(h) +} + +// isProtocolSwitchHeader reports whether the request or response header +// is for a protocol switch. +func isProtocolSwitchHeader(h Header) bool { + return h.Get("Upgrade") != "" && + httpguts.HeaderValuesContainsToken(h["Connection"], "Upgrade") +} diff --git a/backend/vendor/github.com/enetx/http/responsecontroller.go b/backend/vendor/github.com/enetx/http/responsecontroller.go new file mode 100644 index 0000000..785fa21 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/responsecontroller.go @@ -0,0 +1,147 @@ +// Copyright 2022 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http + +import ( + "bufio" + "fmt" + "net" + "time" +) + +// A ResponseController is used by an HTTP handler to control the response. +// +// A ResponseController may not be used after the [Handler.ServeHTTP] method has returned. +type ResponseController struct { + rw ResponseWriter +} + +// NewResponseController creates a [ResponseController] for a request. +// +// The ResponseWriter should be the original value passed to the [Handler.ServeHTTP] method, +// or have an Unwrap method returning the original ResponseWriter. +// +// If the ResponseWriter implements any of the following methods, the ResponseController +// will call them as appropriate: +// +// Flush() +// FlushError() error // alternative Flush returning an error +// Hijack() (net.Conn, *bufio.ReadWriter, error) +// SetReadDeadline(deadline time.Time) error +// SetWriteDeadline(deadline time.Time) error +// EnableFullDuplex() error +// +// If the ResponseWriter does not support a method, ResponseController returns +// an error matching [ErrNotSupported]. +func NewResponseController(rw ResponseWriter) *ResponseController { + return &ResponseController{rw} +} + +type rwUnwrapper interface { + Unwrap() ResponseWriter +} + +// Flush flushes buffered data to the client. +func (c *ResponseController) Flush() error { + rw := c.rw + for { + switch t := rw.(type) { + case interface{ FlushError() error }: + return t.FlushError() + case Flusher: + t.Flush() + return nil + case rwUnwrapper: + rw = t.Unwrap() + default: + return errNotSupported() + } + } +} + +// Hijack lets the caller take over the connection. +// See the [Hijacker] interface for details. +func (c *ResponseController) Hijack() (net.Conn, *bufio.ReadWriter, error) { + rw := c.rw + for { + switch t := rw.(type) { + case Hijacker: + return t.Hijack() + case rwUnwrapper: + rw = t.Unwrap() + default: + return nil, nil, errNotSupported() + } + } +} + +// SetReadDeadline sets the deadline for reading the entire request, including the body. +// Reads from the request body after the deadline has been exceeded will return an error. +// A zero value means no deadline. +// +// Setting the read deadline after it has been exceeded will not extend it. +func (c *ResponseController) SetReadDeadline(deadline time.Time) error { + rw := c.rw + for { + switch t := rw.(type) { + case interface{ SetReadDeadline(time.Time) error }: + return t.SetReadDeadline(deadline) + case rwUnwrapper: + rw = t.Unwrap() + default: + return errNotSupported() + } + } +} + +// SetWriteDeadline sets the deadline for writing the response. +// Writes to the response body after the deadline has been exceeded will not block, +// but may succeed if the data has been buffered. +// A zero value means no deadline. +// +// Setting the write deadline after it has been exceeded will not extend it. +func (c *ResponseController) SetWriteDeadline(deadline time.Time) error { + rw := c.rw + for { + switch t := rw.(type) { + case interface{ SetWriteDeadline(time.Time) error }: + return t.SetWriteDeadline(deadline) + case rwUnwrapper: + rw = t.Unwrap() + default: + return errNotSupported() + } + } +} + +// EnableFullDuplex indicates that the request handler will interleave reads from [Request.Body] +// with writes to the [ResponseWriter]. +// +// For HTTP/1 requests, the Go HTTP server by default consumes any unread portion of +// the request body before beginning to write the response, preventing handlers from +// concurrently reading from the request and writing the response. +// Calling EnableFullDuplex disables this behavior and permits handlers to continue to read +// from the request while concurrently writing the response. +// +// For HTTP/2 requests, the Go HTTP server always permits concurrent reads and responses. +func (c *ResponseController) EnableFullDuplex() error { + rw := c.rw + for { + switch t := rw.(type) { + case interface{ EnableFullDuplex() error }: + return t.EnableFullDuplex() + case rwUnwrapper: + rw = t.Unwrap() + default: + return errNotSupported() + } + } +} + +// errNotSupported returns an error that Is ErrNotSupported, +// but is not == to it. +func errNotSupported() error { + return fmt.Errorf("%w", ErrNotSupported) +} diff --git a/backend/vendor/github.com/enetx/http/roundtrip.go b/backend/vendor/github.com/enetx/http/roundtrip.go new file mode 100644 index 0000000..d2e29a3 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/roundtrip.go @@ -0,0 +1,34 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build !js + +package http + +import _ "unsafe" // for linkname + +// RoundTrip should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/erda-project/erda-infra +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname badRoundTrip net/http.(*Transport).RoundTrip +func badRoundTrip(*Transport, *Request) (*Response, error) + +// RoundTrip implements the [RoundTripper] interface. +// +// For higher-level HTTP client support (such as handling of cookies +// and redirects), see [Get], [Post], and the [Client] type. +// +// Like the RoundTripper interface, the error types returned +// by RoundTrip are unspecified. +func (t *Transport) RoundTrip(req *Request) (*Response, error) { + if t == nil { + panic("transport is nil") + } + return t.roundTrip(req) +} diff --git a/backend/vendor/github.com/enetx/http/roundtrip_js.go b/backend/vendor/github.com/enetx/http/roundtrip_js.go new file mode 100644 index 0000000..76a3b22 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/roundtrip_js.go @@ -0,0 +1,381 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build js && wasm + +package http + +import ( + "errors" + "fmt" + "io" + "strconv" + "strings" + "syscall/js" + + "internal/ascii" +) + +var uint8Array = js.Global().Get("Uint8Array") + +// jsFetchMode is a Request.Header map key that, if present, +// signals that the map entry is actually an option to the Fetch API mode setting. +// Valid values are: "cors", "no-cors", "same-origin", "navigate" +// The default is "same-origin". +// +// Reference: https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters +const jsFetchMode = "js.fetch:mode" + +// jsFetchCreds is a Request.Header map key that, if present, +// signals that the map entry is actually an option to the Fetch API credentials setting. +// Valid values are: "omit", "same-origin", "include" +// The default is "same-origin". +// +// Reference: https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters +const jsFetchCreds = "js.fetch:credentials" + +// jsFetchRedirect is a Request.Header map key that, if present, +// signals that the map entry is actually an option to the Fetch API redirect setting. +// Valid values are: "follow", "error", "manual" +// The default is "follow". +// +// Reference: https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters +const jsFetchRedirect = "js.fetch:redirect" + +// jsFetchMissing will be true if the Fetch API is not present in +// the browser globals. +var jsFetchMissing = js.Global().Get("fetch").IsUndefined() + +// jsFetchDisabled controls whether the use of Fetch API is disabled. +// It's set to true when we detect we're running in Node.js, so that +// RoundTrip ends up talking over the same fake network the HTTP servers +// currently use in various tests and examples. See go.dev/issue/57613. +// +// TODO(go.dev/issue/60810): See if it's viable to test the Fetch API +// code path. +var jsFetchDisabled = js.Global().Get("process").Type() == js.TypeObject && + strings.HasPrefix(js.Global().Get("process").Get("argv0").String(), "node") + +// RoundTrip implements the [RoundTripper] interface using the WHATWG Fetch API. +func (t *Transport) RoundTrip(req *Request) (*Response, error) { + // The Transport has a documented contract that states that if the DialContext or + // DialTLSContext functions are set, they will be used to set up the connections. + // If they aren't set then the documented contract is to use Dial or DialTLS, even + // though they are deprecated. Therefore, if any of these are set, we should obey + // the contract and dial using the regular round-trip instead. Otherwise, we'll try + // to fall back on the Fetch API, unless it's not available. + if t.Dial != nil || t.DialContext != nil || t.DialTLS != nil || t.DialTLSContext != nil || jsFetchMissing || jsFetchDisabled { + return t.roundTrip(req) + } + + ac := js.Global().Get("AbortController") + if !ac.IsUndefined() { + // Some browsers that support WASM don't necessarily support + // the AbortController. See + // https://developer.mozilla.org/en-US/docs/Web/API/AbortController#Browser_compatibility. + ac = ac.New() + } + + opt := js.Global().Get("Object").New() + // See https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch + // for options available. + opt.Set("method", req.Method) + opt.Set("credentials", "same-origin") + if h := req.Header.Get(jsFetchCreds); h != "" { + opt.Set("credentials", h) + req.Header.Del(jsFetchCreds) + } + if h := req.Header.Get(jsFetchMode); h != "" { + opt.Set("mode", h) + req.Header.Del(jsFetchMode) + } + if h := req.Header.Get(jsFetchRedirect); h != "" { + opt.Set("redirect", h) + req.Header.Del(jsFetchRedirect) + } + if !ac.IsUndefined() { + opt.Set("signal", ac.Get("signal")) + } + headers := js.Global().Get("Headers").New() + for key, values := range req.Header { + for _, value := range values { + headers.Call("append", key, value) + } + } + opt.Set("headers", headers) + + if req.Body != nil { + // TODO(johanbrandhorst): Stream request body when possible. + // See https://bugs.chromium.org/p/chromium/issues/detail?id=688906 for Blink issue. + // See https://bugzilla.mozilla.org/show_bug.cgi?id=1387483 for Firefox issue. + // See https://github.com/web-platform-tests/wpt/issues/7693 for WHATWG tests issue. + // See https://developer.mozilla.org/en-US/docs/Web/API/Streams_API for more details on the Streams API + // and browser support. + // NOTE(haruyama480): Ensure HTTP/1 fallback exists. + // See https://go.dev/issue/61889 for discussion. + body, err := io.ReadAll(req.Body) + if err != nil { + req.Body.Close() // RoundTrip must always close the body, including on errors. + return nil, err + } + req.Body.Close() + if len(body) != 0 { + buf := uint8Array.New(len(body)) + js.CopyBytesToJS(buf, body) + opt.Set("body", buf) + } + } + + fetchPromise := js.Global().Call("fetch", req.URL.String(), opt) + var ( + respCh = make(chan *Response, 1) + errCh = make(chan error, 1) + success, failure js.Func + ) + success = js.FuncOf(func(this js.Value, args []js.Value) any { + success.Release() + failure.Release() + + result := args[0] + header := Header{} + // https://developer.mozilla.org/en-US/docs/Web/API/Headers/entries + headersIt := result.Get("headers").Call("entries") + for { + n := headersIt.Call("next") + if n.Get("done").Bool() { + break + } + pair := n.Get("value") + key, value := pair.Index(0).String(), pair.Index(1).String() + ck := CanonicalHeaderKey(key) + header[ck] = append(header[ck], value) + } + + contentLength := int64(0) + clHeader := header.Get("Content-Length") + switch { + case clHeader != "": + cl, err := strconv.ParseInt(clHeader, 10, 64) + if err != nil { + errCh <- fmt.Errorf("net/http: ill-formed Content-Length header: %v", err) + return nil + } + if cl < 0 { + // Content-Length values less than 0 are invalid. + // See: https://datatracker.ietf.org/doc/html/rfc2616/#section-14.13 + errCh <- fmt.Errorf("net/http: invalid Content-Length header: %q", clHeader) + return nil + } + contentLength = cl + default: + // If the response length is not declared, set it to -1. + contentLength = -1 + } + + b := result.Get("body") + var body io.ReadCloser + // The body is undefined when the browser does not support streaming response bodies (Firefox), + // and null in certain error cases, i.e. when the request is blocked because of CORS settings. + if !b.IsUndefined() && !b.IsNull() { + body = &streamReader{stream: b.Call("getReader")} + } else { + // Fall back to using ArrayBuffer + // https://developer.mozilla.org/en-US/docs/Web/API/Body/arrayBuffer + body = &arrayReader{arrayPromise: result.Call("arrayBuffer")} + } + + code := result.Get("status").Int() + + uncompressed := false + if ascii.EqualFold(header.Get("Content-Encoding"), "gzip") { + // The fetch api will decode the gzip, but Content-Encoding not be deleted. + header.Del("Content-Encoding") + header.Del("Content-Length") + contentLength = -1 + uncompressed = true + } + + respCh <- &Response{ + Status: fmt.Sprintf("%d %s", code, StatusText(code)), + StatusCode: code, + Header: header, + ContentLength: contentLength, + Uncompressed: uncompressed, + Body: body, + Request: req, + } + + return nil + }) + failure = js.FuncOf(func(this js.Value, args []js.Value) any { + success.Release() + failure.Release() + + err := args[0] + // The error is a JS Error type + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error + // We can use the toString() method to get a string representation of the error. + errMsg := err.Call("toString").String() + // Errors can optionally contain a cause. + if cause := err.Get("cause"); !cause.IsUndefined() { + // The exact type of the cause is not defined, + // but if it's another error, we can call toString() on it too. + if !cause.Get("toString").IsUndefined() { + errMsg += ": " + cause.Call("toString").String() + } else if cause.Type() == js.TypeString { + errMsg += ": " + cause.String() + } + } + errCh <- fmt.Errorf("net/http: fetch() failed: %s", errMsg) + return nil + }) + + fetchPromise.Call("then", success, failure) + select { + case <-req.Context().Done(): + if !ac.IsUndefined() { + // Abort the Fetch request. + ac.Call("abort") + + // Wait for fetch promise to be rejected prior to exiting. See + // https://github.com/golang/go/issues/57098 for more details. + select { + case resp := <-respCh: + resp.Body.Close() + case <-errCh: + } + } + return nil, req.Context().Err() + case resp := <-respCh: + return resp, nil + case err := <-errCh: + return nil, err + } +} + +var errClosed = errors.New("net/http: reader is closed") + +// streamReader implements an io.ReadCloser wrapper for ReadableStream. +// See https://fetch.spec.whatwg.org/#readablestream for more information. +type streamReader struct { + pending []byte + stream js.Value + err error // sticky read error +} + +func (r *streamReader) Read(p []byte) (n int, err error) { + if r.err != nil { + return 0, r.err + } + if len(r.pending) == 0 { + var ( + bCh = make(chan []byte, 1) + errCh = make(chan error, 1) + ) + success := js.FuncOf(func(this js.Value, args []js.Value) any { + result := args[0] + if result.Get("done").Bool() { + errCh <- io.EOF + return nil + } + value := make([]byte, result.Get("value").Get("byteLength").Int()) + js.CopyBytesToGo(value, result.Get("value")) + bCh <- value + return nil + }) + defer success.Release() + failure := js.FuncOf(func(this js.Value, args []js.Value) any { + // Assumes it's a TypeError. See + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError + // for more information on this type. See + // https://streams.spec.whatwg.org/#byob-reader-read for the spec on + // the read method. + errCh <- errors.New(args[0].Get("message").String()) + return nil + }) + defer failure.Release() + r.stream.Call("read").Call("then", success, failure) + select { + case b := <-bCh: + r.pending = b + case err := <-errCh: + r.err = err + return 0, err + } + } + n = copy(p, r.pending) + r.pending = r.pending[n:] + return n, nil +} + +func (r *streamReader) Close() error { + // This ignores any error returned from cancel method. So far, I did not encounter any concrete + // situation where reporting the error is meaningful. Most users ignore error from resp.Body.Close(). + // If there's a need to report error here, it can be implemented and tested when that need comes up. + r.stream.Call("cancel") + if r.err == nil { + r.err = errClosed + } + return nil +} + +// arrayReader implements an io.ReadCloser wrapper for ArrayBuffer. +// https://developer.mozilla.org/en-US/docs/Web/API/Body/arrayBuffer. +type arrayReader struct { + arrayPromise js.Value + pending []byte + read bool + err error // sticky read error +} + +func (r *arrayReader) Read(p []byte) (n int, err error) { + if r.err != nil { + return 0, r.err + } + if !r.read { + r.read = true + var ( + bCh = make(chan []byte, 1) + errCh = make(chan error, 1) + ) + success := js.FuncOf(func(this js.Value, args []js.Value) any { + // Wrap the input ArrayBuffer with a Uint8Array + uint8arrayWrapper := uint8Array.New(args[0]) + value := make([]byte, uint8arrayWrapper.Get("byteLength").Int()) + js.CopyBytesToGo(value, uint8arrayWrapper) + bCh <- value + return nil + }) + defer success.Release() + failure := js.FuncOf(func(this js.Value, args []js.Value) any { + // Assumes it's a TypeError. See + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError + // for more information on this type. + // See https://fetch.spec.whatwg.org/#concept-body-consume-body for reasons this might error. + errCh <- errors.New(args[0].Get("message").String()) + return nil + }) + defer failure.Release() + r.arrayPromise.Call("then", success, failure) + select { + case b := <-bCh: + r.pending = b + case err := <-errCh: + return 0, err + } + } + if len(r.pending) == 0 { + return 0, io.EOF + } + n = copy(p, r.pending) + r.pending = r.pending[n:] + return n, nil +} + +func (r *arrayReader) Close() error { + if r.err == nil { + r.err = errClosed + } + return nil +} diff --git a/backend/vendor/github.com/enetx/http/routing_index.go b/backend/vendor/github.com/enetx/http/routing_index.go new file mode 100644 index 0000000..9ac42c9 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/routing_index.go @@ -0,0 +1,124 @@ +// Copyright 2023 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http + +import "math" + +// A routingIndex optimizes conflict detection by indexing patterns. +// +// The basic idea is to rule out patterns that cannot conflict with a given +// pattern because they have a different literal in a corresponding segment. +// See the comments in [routingIndex.possiblyConflictingPatterns] for more details. +type routingIndex struct { + // map from a particular segment position and value to all registered patterns + // with that value in that position. + // For example, the key {1, "b"} would hold the patterns "/a/b" and "/a/b/c" + // but not "/a", "b/a", "/a/c" or "/a/{x}". + segments map[routingIndexKey][]*pattern + // All patterns that end in a multi wildcard (including trailing slash). + // We do not try to be clever about indexing multi patterns, because there + // are unlikely to be many of them. + multis []*pattern +} + +type routingIndexKey struct { + pos int // 0-based segment position + s string // literal, or empty for wildcard +} + +func (idx *routingIndex) addPattern(pat *pattern) { + if pat.lastSegment().multi { + idx.multis = append(idx.multis, pat) + } else { + if idx.segments == nil { + idx.segments = map[routingIndexKey][]*pattern{} + } + for pos, seg := range pat.segments { + key := routingIndexKey{pos: pos, s: ""} + if !seg.wild { + key.s = seg.s + } + idx.segments[key] = append(idx.segments[key], pat) + } + } +} + +// possiblyConflictingPatterns calls f on all patterns that might conflict with +// pat. If f returns a non-nil error, possiblyConflictingPatterns returns immediately +// with that error. +// +// To be correct, possiblyConflictingPatterns must include all patterns that +// might conflict. But it may also include patterns that cannot conflict. +// For instance, an implementation that returns all registered patterns is correct. +// We use this fact throughout, simplifying the implementation by returning more +// patterns that we might need to. +func (idx *routingIndex) possiblyConflictingPatterns(pat *pattern, f func(*pattern) error) (err error) { + // Terminology: + // dollar pattern: one ending in "{$}" + // multi pattern: one ending in a trailing slash or "{x...}" wildcard + // ordinary pattern: neither of the above + + // apply f to all the pats, stopping on error. + apply := func(pats []*pattern) error { + if err != nil { + return err + } + for _, p := range pats { + err = f(p) + if err != nil { + return err + } + } + return nil + } + + // Our simple indexing scheme doesn't try to prune multi patterns; assume + // any of them can match the argument. + if err := apply(idx.multis); err != nil { + return err + } + if pat.lastSegment().s == "/" { + // All paths that a dollar pattern matches end in a slash; no paths that + // an ordinary pattern matches do. So only other dollar or multi + // patterns can conflict with a dollar pattern. Furthermore, conflicting + // dollar patterns must have the {$} in the same position. + return apply(idx.segments[routingIndexKey{s: "/", pos: len(pat.segments) - 1}]) + } + // For ordinary and multi patterns, the only conflicts can be with a multi, + // or a pattern that has the same literal or a wildcard at some literal + // position. + // We could intersect all the possible matches at each position, but we + // do something simpler: we find the position with the fewest patterns. + var lmin, wmin []*pattern + min := math.MaxInt + hasLit := false + for i, seg := range pat.segments { + if seg.multi { + break + } + if !seg.wild { + hasLit = true + lpats := idx.segments[routingIndexKey{s: seg.s, pos: i}] + wpats := idx.segments[routingIndexKey{s: "", pos: i}] + if sum := len(lpats) + len(wpats); sum < min { + lmin = lpats + wmin = wpats + min = sum + } + } + } + if hasLit { + apply(lmin) + apply(wmin) + return err + } + + // This pattern is all wildcards. + // Check it against everything. + for _, pats := range idx.segments { + apply(pats) + } + return err +} diff --git a/backend/vendor/github.com/enetx/http/routing_tree.go b/backend/vendor/github.com/enetx/http/routing_tree.go new file mode 100644 index 0000000..fdc58ab --- /dev/null +++ b/backend/vendor/github.com/enetx/http/routing_tree.go @@ -0,0 +1,242 @@ +// Copyright 2023 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements a decision tree for fast matching of requests to +// patterns. +// +// The root of the tree branches on the host of the request. +// The next level branches on the method. +// The remaining levels branch on consecutive segments of the path. +// +// The "more specific wins" precedence rule can result in backtracking. +// For example, given the patterns +// /a/b/z +// /a/{x}/c +// we will first try to match the path "/a/b/c" with /a/b/z, and +// when that fails we will try against /a/{x}/c. + +package http + +import ( + "strings" +) + +// A routingNode is a node in the decision tree. +// The same struct is used for leaf and interior nodes. +type routingNode struct { + // A leaf node holds a single pattern and the Handler it was registered + // with. + pattern *pattern + handler Handler + + // An interior node maps parts of the incoming request to child nodes. + // special children keys: + // "/" trailing slash (resulting from {$}) + // "" single wildcard + children mapping[string, *routingNode] + multiChild *routingNode // child with multi wildcard + emptyChild *routingNode // optimization: child with key "" +} + +// addPattern adds a pattern and its associated Handler to the tree +// at root. +func (root *routingNode) addPattern(p *pattern, h Handler) { + // First level of tree is host. + n := root.addChild(p.host) + // Second level of tree is method. + n = n.addChild(p.method) + // Remaining levels are path. + n.addSegments(p.segments, p, h) +} + +// addSegments adds the given segments to the tree rooted at n. +// If there are no segments, then n is a leaf node that holds +// the given pattern and handler. +func (n *routingNode) addSegments(segs []segment, p *pattern, h Handler) { + if len(segs) == 0 { + n.set(p, h) + return + } + seg := segs[0] + if seg.multi { + if len(segs) != 1 { + panic("multi wildcard not last") + } + c := &routingNode{} + n.multiChild = c + c.set(p, h) + } else if seg.wild { + n.addChild("").addSegments(segs[1:], p, h) + } else { + n.addChild(seg.s).addSegments(segs[1:], p, h) + } +} + +// set sets the pattern and handler for n, which +// must be a leaf node. +func (n *routingNode) set(p *pattern, h Handler) { + if n.pattern != nil || n.handler != nil { + panic("non-nil leaf fields") + } + n.pattern = p + n.handler = h +} + +// addChild adds a child node with the given key to n +// if one does not exist, and returns the child. +func (n *routingNode) addChild(key string) *routingNode { + if key == "" { + if n.emptyChild == nil { + n.emptyChild = &routingNode{} + } + return n.emptyChild + } + if c := n.findChild(key); c != nil { + return c + } + c := &routingNode{} + n.children.add(key, c) + return c +} + +// findChild returns the child of n with the given key, or nil +// if there is no child with that key. +func (n *routingNode) findChild(key string) *routingNode { + if key == "" { + return n.emptyChild + } + r, _ := n.children.find(key) + return r +} + +// match returns the leaf node under root that matches the arguments, and a list +// of values for pattern wildcards in the order that the wildcards appear. +// For example, if the request path is "/a/b/c" and the pattern is "/{x}/b/{y}", +// then the second return value will be []string{"a", "c"}. +func (root *routingNode) match(host, method, path string) (*routingNode, []string) { + if host != "" { + // There is a host. If there is a pattern that specifies that host and it + // matches, we are done. If the pattern doesn't match, fall through to + // try patterns with no host. + if l, m := root.findChild(host).matchMethodAndPath(method, path); l != nil { + return l, m + } + } + return root.emptyChild.matchMethodAndPath(method, path) +} + +// matchMethodAndPath matches the method and path. +// Its return values are the same as [routingNode.match]. +// The receiver should be a child of the root. +func (n *routingNode) matchMethodAndPath(method, path string) (*routingNode, []string) { + if n == nil { + return nil, nil + } + if l, m := n.findChild(method).matchPath(path, nil); l != nil { + // Exact match of method name. + return l, m + } + if method == "HEAD" { + // GET matches HEAD too. + if l, m := n.findChild("GET").matchPath(path, nil); l != nil { + return l, m + } + } + // No exact match; try patterns with no method. + return n.emptyChild.matchPath(path, nil) +} + +// matchPath matches a path. +// Its return values are the same as [routingNode.match]. +// matchPath calls itself recursively. The matches argument holds the wildcard matches +// found so far. +func (n *routingNode) matchPath(path string, matches []string) (*routingNode, []string) { + if n == nil { + return nil, nil + } + // If path is empty, then we are done. + // If n is a leaf node, we found a match; return it. + // If n is an interior node (which means it has a nil pattern), + // then we failed to match. + if path == "" { + if n.pattern == nil { + return nil, nil + } + return n, matches + } + // Get the first segment of path. + seg, rest := firstSegment(path) + // First try matching against patterns that have a literal for this position. + // We know by construction that such patterns are more specific than those + // with a wildcard at this position (they are either more specific, equivalent, + // or overlap, and we ruled out the first two when the patterns were registered). + if n, m := n.findChild(seg).matchPath(rest, matches); n != nil { + return n, m + } + // If matching a literal fails, try again with patterns that have a single + // wildcard (represented by an empty string in the child mapping). + // Again, by construction, patterns with a single wildcard must be more specific than + // those with a multi wildcard. + // We skip this step if the segment is a trailing slash, because single wildcards + // don't match trailing slashes. + if seg != "/" { + if n, m := n.emptyChild.matchPath(rest, append(matches, seg)); n != nil { + return n, m + } + } + // Lastly, match the pattern (there can be at most one) that has a multi + // wildcard in this position to the rest of the path. + if c := n.multiChild; c != nil { + // Don't record a match for a nameless wildcard (which arises from a + // trailing slash in the pattern). + if c.pattern.lastSegment().s != "" { + matches = append(matches, pathUnescape(path[1:])) // remove initial slash + } + return c, matches + } + return nil, nil +} + +// firstSegment splits path into its first segment, and the rest. +// The path must begin with "/". +// If path consists of only a slash, firstSegment returns ("/", ""). +// The segment is returned unescaped, if possible. +func firstSegment(path string) (seg, rest string) { + if path == "/" { + return "/", "" + } + path = path[1:] // drop initial slash + i := strings.IndexByte(path, '/') + if i < 0 { + i = len(path) + } + return pathUnescape(path[:i]), path[i:] +} + +// matchingMethods adds to methodSet all the methods that would result in a +// match if passed to routingNode.match with the given host and path. +func (root *routingNode) matchingMethods(host, path string, methodSet map[string]bool) { + if host != "" { + root.findChild(host).matchingMethodsPath(path, methodSet) + } + root.emptyChild.matchingMethodsPath(path, methodSet) + if methodSet["GET"] { + methodSet["HEAD"] = true + } +} + +func (n *routingNode) matchingMethodsPath(path string, set map[string]bool) { + if n == nil { + return + } + n.children.eachPair(func(method string, c *routingNode) bool { + if p, _ := c.matchPath(path, nil); p != nil { + set[method] = true + } + return true + }) + // Don't look at the empty child. If there were an empty + // child, it would match on any method, but we only + // call this when we fail to match on a method. +} diff --git a/backend/vendor/github.com/enetx/http/servemux121.go b/backend/vendor/github.com/enetx/http/servemux121.go new file mode 100644 index 0000000..1badb1b --- /dev/null +++ b/backend/vendor/github.com/enetx/http/servemux121.go @@ -0,0 +1,214 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http + +// This file implements ServeMux behavior as in Go 1.21. +// The behavior is controlled by a GODEBUG setting. +// Most of this code is derived from commit 08e35cc334. +// Changes are minimal: aside from the different receiver type, +// they mostly involve renaming functions, usually by unexporting them. + +// servemux121.go exists solely to provide a snapshot of +// the pre-Go 1.22 ServeMux implementation for backwards compatibility. +// Do not modify this file, it should remain frozen. + +import ( + "net/url" + "sort" + "strings" + "sync" +) + +// var httpmuxgo121 = godebug.New("httpmuxgo121") + +var use121 bool + +// Read httpmuxgo121 once at startup, since dealing with changes to it during +// program execution is too complex and error-prone. +// func init() { +// if httpmuxgo121.Value() == "1" { +// use121 = true +// httpmuxgo121.IncNonDefault() +// } +// } + +// serveMux121 holds the state of a ServeMux needed for Go 1.21 behavior. +type serveMux121 struct { + mu sync.RWMutex + m map[string]muxEntry + es []muxEntry // slice of entries sorted from longest to shortest. + hosts bool // whether any patterns contain hostnames +} + +type muxEntry struct { + h Handler + pattern string +} + +// Formerly ServeMux.Handle. +func (mux *serveMux121) handle(pattern string, handler Handler) { + mux.mu.Lock() + defer mux.mu.Unlock() + + if pattern == "" { + panic("http: invalid pattern") + } + if handler == nil { + panic("http: nil handler") + } + if _, exist := mux.m[pattern]; exist { + panic("http: multiple registrations for " + pattern) + } + + if mux.m == nil { + mux.m = make(map[string]muxEntry) + } + e := muxEntry{h: handler, pattern: pattern} + mux.m[pattern] = e + if pattern[len(pattern)-1] == '/' { + mux.es = appendSorted(mux.es, e) + } + + if pattern[0] != '/' { + mux.hosts = true + } +} + +func appendSorted(es []muxEntry, e muxEntry) []muxEntry { + n := len(es) + i := sort.Search(n, func(i int) bool { + return len(es[i].pattern) < len(e.pattern) + }) + if i == n { + return append(es, e) + } + // we now know that i points at where we want to insert + es = append(es, muxEntry{}) // try to grow the slice in place, any entry works. + copy(es[i+1:], es[i:]) // Move shorter entries down + es[i] = e + return es +} + +// Formerly ServeMux.HandleFunc. +func (mux *serveMux121) handleFunc(pattern string, handler func(ResponseWriter, *Request)) { + if handler == nil { + panic("http: nil handler") + } + mux.handle(pattern, HandlerFunc(handler)) +} + +// Formerly ServeMux.Handler. +func (mux *serveMux121) findHandler(r *Request) (h Handler, pattern string) { + + // CONNECT requests are not canonicalized. + if r.Method == "CONNECT" { + // If r.URL.Path is /tree and its handler is not registered, + // the /tree -> /tree/ redirect applies to CONNECT requests + // but the path canonicalization does not. + if u, ok := mux.redirectToPathSlash(r.URL.Host, r.URL.Path, r.URL); ok { + return RedirectHandler(u.String(), StatusMovedPermanently), u.Path + } + + return mux.handler(r.Host, r.URL.Path) + } + + // All other requests have any port stripped and path cleaned + // before passing to mux.handler. + host := stripHostPort(r.Host) + path := cleanPath(r.URL.Path) + + // If the given path is /tree and its handler is not registered, + // redirect for /tree/. + if u, ok := mux.redirectToPathSlash(host, path, r.URL); ok { + return RedirectHandler(u.String(), StatusMovedPermanently), u.Path + } + + if path != r.URL.Path { + _, pattern = mux.handler(host, path) + u := &url.URL{Path: path, RawQuery: r.URL.RawQuery} + return RedirectHandler(u.String(), StatusMovedPermanently), pattern + } + + return mux.handler(host, r.URL.Path) +} + +// handler is the main implementation of findHandler. +// The path is known to be in canonical form, except for CONNECT methods. +func (mux *serveMux121) handler(host, path string) (h Handler, pattern string) { + mux.mu.RLock() + defer mux.mu.RUnlock() + + // Host-specific pattern takes precedence over generic ones + if mux.hosts { + h, pattern = mux.match(host + path) + } + if h == nil { + h, pattern = mux.match(path) + } + if h == nil { + h, pattern = NotFoundHandler(), "" + } + return +} + +// Find a handler on a handler map given a path string. +// Most-specific (longest) pattern wins. +func (mux *serveMux121) match(path string) (h Handler, pattern string) { + // Check for exact match first. + v, ok := mux.m[path] + if ok { + return v.h, v.pattern + } + + // Check for longest valid match. mux.es contains all patterns + // that end in / sorted from longest to shortest. + for _, e := range mux.es { + if strings.HasPrefix(path, e.pattern) { + return e.h, e.pattern + } + } + return nil, "" +} + +// redirectToPathSlash determines if the given path needs appending "/" to it. +// This occurs when a handler for path + "/" was already registered, but +// not for path itself. If the path needs appending to, it creates a new +// URL, setting the path to u.Path + "/" and returning true to indicate so. +func (mux *serveMux121) redirectToPathSlash(host, path string, u *url.URL) (*url.URL, bool) { + mux.mu.RLock() + shouldRedirect := mux.shouldRedirectRLocked(host, path) + mux.mu.RUnlock() + if !shouldRedirect { + return u, false + } + path = path + "/" + u = &url.URL{Path: path, RawQuery: u.RawQuery} + return u, true +} + +// shouldRedirectRLocked reports whether the given path and host should be redirected to +// path+"/". This should happen if a handler is registered for path+"/" but +// not path -- see comments at ServeMux. +func (mux *serveMux121) shouldRedirectRLocked(host, path string) bool { + p := []string{path, host + path} + + for _, c := range p { + if _, exist := mux.m[c]; exist { + return false + } + } + + n := len(path) + if n == 0 { + return false + } + for _, c := range p { + if _, exist := mux.m[c+"/"]; exist { + return path[n-1] != '/' + } + } + + return false +} diff --git a/backend/vendor/github.com/enetx/http/server.go b/backend/vendor/github.com/enetx/http/server.go new file mode 100644 index 0000000..0b83161 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/server.go @@ -0,0 +1,4118 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// HTTP server. See RFC 7230 through 7235. + +package http + +import ( + "bufio" + "bytes" + "context" + "crypto/tls" + "errors" + "fmt" + "io" + "log" + "maps" + "math/rand" + "net" + "net/textproto" + "net/url" + urlpkg "net/url" + "path" + "runtime" + "slices" + "strconv" + "strings" + "sync" + "sync/atomic" + "time" + _ "unsafe" // for linkname + + "golang.org/x/net/http/httpguts" +) + +// Errors used by the HTTP server. +var ( + // ErrBodyNotAllowed is returned by ResponseWriter.Write calls + // when the HTTP method or response code does not permit a + // body. + ErrBodyNotAllowed = errors.New("http: request method or response status code does not allow body") + + // ErrHijacked is returned by ResponseWriter.Write calls when + // the underlying connection has been hijacked using the + // Hijacker interface. A zero-byte write on a hijacked + // connection will return ErrHijacked without any other side + // effects. + ErrHijacked = errors.New("http: connection has been hijacked") + + // ErrContentLength is returned by ResponseWriter.Write calls + // when a Handler set a Content-Length response header with a + // declared size and then attempted to write more bytes than + // declared. + ErrContentLength = errors.New("http: wrote more than the declared Content-Length") + + // Deprecated: ErrWriteAfterFlush is no longer returned by + // anything in the net/http package. Callers should not + // compare errors against this variable. + ErrWriteAfterFlush = errors.New("unused") +) + +// A Handler responds to an HTTP request. +// +// [Handler.ServeHTTP] should write reply headers and data to the [ResponseWriter] +// and then return. Returning signals that the request is finished; it +// is not valid to use the [ResponseWriter] or read from the +// [Request.Body] after or concurrently with the completion of the +// ServeHTTP call. +// +// Depending on the HTTP client software, HTTP protocol version, and +// any intermediaries between the client and the Go server, it may not +// be possible to read from the [Request.Body] after writing to the +// [ResponseWriter]. Cautious handlers should read the [Request.Body] +// first, and then reply. +// +// Except for reading the body, handlers should not modify the +// provided Request. +// +// If ServeHTTP panics, the server (the caller of ServeHTTP) assumes +// that the effect of the panic was isolated to the active request. +// It recovers the panic, logs a stack trace to the server error log, +// and either closes the network connection or sends an HTTP/2 +// RST_STREAM, depending on the HTTP protocol. To abort a handler so +// the client sees an interrupted response but the server doesn't log +// an error, panic with the value [ErrAbortHandler]. +type Handler interface { + ServeHTTP(ResponseWriter, *Request) +} + +// A ResponseWriter interface is used by an HTTP handler to +// construct an HTTP response. +// +// A ResponseWriter may not be used after [Handler.ServeHTTP] has returned. +type ResponseWriter interface { + // Header returns the header map that will be sent by + // [ResponseWriter.WriteHeader]. The [Header] map also is the mechanism with which + // [Handler] implementations can set HTTP trailers. + // + // Changing the header map after a call to [ResponseWriter.WriteHeader] (or + // [ResponseWriter.Write]) has no effect unless the HTTP status code was of the + // 1xx class or the modified headers are trailers. + // + // There are two ways to set Trailers. The preferred way is to + // predeclare in the headers which trailers you will later + // send by setting the "Trailer" header to the names of the + // trailer keys which will come later. In this case, those + // keys of the Header map are treated as if they were + // trailers. See the example. The second way, for trailer + // keys not known to the [Handler] until after the first [ResponseWriter.Write], + // is to prefix the [Header] map keys with the [TrailerPrefix] + // constant value. + // + // To suppress automatic response headers (such as "Date"), set + // their value to nil. + Header() Header + + // Write writes the data to the connection as part of an HTTP reply. + // + // If [ResponseWriter.WriteHeader] has not yet been called, Write calls + // WriteHeader(http.StatusOK) before writing the data. If the Header + // does not contain a Content-Type line, Write adds a Content-Type set + // to the result of passing the initial 512 bytes of written data to + // [DetectContentType]. Additionally, if the total size of all written + // data is under a few KB and there are no Flush calls, the + // Content-Length header is added automatically. + // + // Depending on the HTTP protocol version and the client, calling + // Write or WriteHeader may prevent future reads on the + // Request.Body. For HTTP/1.x requests, handlers should read any + // needed request body data before writing the response. Once the + // headers have been flushed (due to either an explicit Flusher.Flush + // call or writing enough data to trigger a flush), the request body + // may be unavailable. For HTTP/2 requests, the Go HTTP server permits + // handlers to continue to read the request body while concurrently + // writing the response. However, such behavior may not be supported + // by all HTTP/2 clients. Handlers should read before writing if + // possible to maximize compatibility. + Write([]byte) (int, error) + + // WriteHeader sends an HTTP response header with the provided + // status code. + // + // If WriteHeader is not called explicitly, the first call to Write + // will trigger an implicit WriteHeader(http.StatusOK). + // Thus explicit calls to WriteHeader are mainly used to + // send error codes or 1xx informational responses. + // + // The provided code must be a valid HTTP 1xx-5xx status code. + // Any number of 1xx headers may be written, followed by at most + // one 2xx-5xx header. 1xx headers are sent immediately, but 2xx-5xx + // headers may be buffered. Use the Flusher interface to send + // buffered data. The header map is cleared when 2xx-5xx headers are + // sent, but not with 1xx headers. + // + // The server will automatically send a 100 (Continue) header + // on the first read from the request body if the request has + // an "Expect: 100-continue" header. + WriteHeader(statusCode int) +} + +// The Flusher interface is implemented by ResponseWriters that allow +// an HTTP handler to flush buffered data to the client. +// +// The default HTTP/1.x and HTTP/2 [ResponseWriter] implementations +// support [Flusher], but ResponseWriter wrappers may not. Handlers +// should always test for this ability at runtime. +// +// Note that even for ResponseWriters that support Flush, +// if the client is connected through an HTTP proxy, +// the buffered data may not reach the client until the response +// completes. +type Flusher interface { + // Flush sends any buffered data to the client. + Flush() +} + +// The Hijacker interface is implemented by ResponseWriters that allow +// an HTTP handler to take over the connection. +// +// The default [ResponseWriter] for HTTP/1.x connections supports +// Hijacker, but HTTP/2 connections intentionally do not. +// ResponseWriter wrappers may also not support Hijacker. Handlers +// should always test for this ability at runtime. +type Hijacker interface { + // Hijack lets the caller take over the connection. + // After a call to Hijack the HTTP server library + // will not do anything else with the connection. + // + // It becomes the caller's responsibility to manage + // and close the connection. + // + // The returned net.Conn may have read or write deadlines + // already set, depending on the configuration of the + // Server. It is the caller's responsibility to set + // or clear those deadlines as needed. + // + // The returned bufio.Reader may contain unprocessed buffered + // data from the client. + // + // After a call to Hijack, the original Request.Body must not + // be used. The original Request's Context remains valid and + // is not canceled until the Request's ServeHTTP method + // returns. + Hijack() (net.Conn, *bufio.ReadWriter, error) +} + +// The CloseNotifier interface is implemented by ResponseWriters which +// allow detecting when the underlying connection has gone away. +// +// This mechanism can be used to cancel long operations on the server +// if the client has disconnected before the response is ready. +// +// Deprecated: the CloseNotifier interface predates Go's context package. +// New code should use [Request.Context] instead. +type CloseNotifier interface { + // CloseNotify returns a channel that receives at most a + // single value (true) when the client connection has gone + // away. + // + // CloseNotify may wait to notify until Request.Body has been + // fully read. + // + // After the Handler has returned, there is no guarantee + // that the channel receives a value. + // + // If the protocol is HTTP/1.1 and CloseNotify is called while + // processing an idempotent request (such as GET) while + // HTTP/1.1 pipelining is in use, the arrival of a subsequent + // pipelined request may cause a value to be sent on the + // returned channel. In practice HTTP/1.1 pipelining is not + // enabled in browsers and not seen often in the wild. If this + // is a problem, use HTTP/2 or only use CloseNotify on methods + // such as POST. + CloseNotify() <-chan bool +} + +var ( + // ServerContextKey is a context key. It can be used in HTTP + // handlers with Context.Value to access the server that + // started the handler. The associated value will be of + // type *Server. + ServerContextKey = &contextKey{"http-server"} + + // LocalAddrContextKey is a context key. It can be used in + // HTTP handlers with Context.Value to access the local + // address the connection arrived on. + // The associated value will be of type net.Addr. + LocalAddrContextKey = &contextKey{"local-addr"} +) + +// A conn represents the server side of an HTTP connection. +type conn struct { + // server is the server on which the connection arrived. + // Immutable; never nil. + server *Server + + // cancelCtx cancels the connection-level context. + cancelCtx context.CancelFunc + + // rwc is the underlying network connection. + // This is never wrapped by other types and is the value given out + // to [Hijacker] callers. It is usually of type *net.TCPConn or + // *tls.Conn. + rwc net.Conn + + // remoteAddr is rwc.RemoteAddr().String(). It is not populated synchronously + // inside the Listener's Accept goroutine, as some implementations block. + // It is populated immediately inside the (*conn).serve goroutine. + // This is the value of a Handler's (*Request).RemoteAddr. + remoteAddr string + + // tlsState is the TLS connection state when using TLS. + // nil means not TLS. + tlsState *tls.ConnectionState + + // werr is set to the first write error to rwc. + // It is set via checkConnErrorWriter{w}, where bufw writes. + werr error + + // r is bufr's read source. It's a wrapper around rwc that provides + // io.LimitedReader-style limiting (while reading request headers) + // and functionality to support CloseNotifier. See *connReader docs. + r *connReader + + // bufr reads from r. + bufr *bufio.Reader + + // bufw writes to checkConnErrorWriter{c}, which populates werr on error. + bufw *bufio.Writer + + // lastMethod is the method of the most recent request + // on this connection, if any. + lastMethod string + + curReq atomic.Pointer[response] // (which has a Request in it) + + curState atomic.Uint64 // packed (unixtime<<8|uint8(ConnState)) + + // mu guards hijackedv + mu sync.Mutex + + // hijackedv is whether this connection has been hijacked + // by a Handler with the Hijacker interface. + // It is guarded by mu. + hijackedv bool +} + +func (c *conn) hijacked() bool { + c.mu.Lock() + defer c.mu.Unlock() + return c.hijackedv +} + +// c.mu must be held. +func (c *conn) hijackLocked() (rwc net.Conn, buf *bufio.ReadWriter, err error) { + if c.hijackedv { + return nil, nil, ErrHijacked + } + c.r.abortPendingRead() + + c.hijackedv = true + rwc = c.rwc + rwc.SetDeadline(time.Time{}) + + if c.r.hasByte { + if _, err := c.bufr.Peek(c.bufr.Buffered() + 1); err != nil { + return nil, nil, fmt.Errorf("unexpected Peek failure reading buffered byte: %v", err) + } + } + c.bufw.Reset(rwc) + buf = bufio.NewReadWriter(c.bufr, c.bufw) + + c.setState(rwc, StateHijacked, runHooks) + return +} + +// This should be >= 512 bytes for DetectContentType, +// but otherwise it's somewhat arbitrary. +const bufferBeforeChunkingSize = 2048 + +// chunkWriter writes to a response's conn buffer, and is the writer +// wrapped by the response.w buffered writer. +// +// chunkWriter also is responsible for finalizing the Header, including +// conditionally setting the Content-Type and setting a Content-Length +// in cases where the handler's final output is smaller than the buffer +// size. It also conditionally adds chunk headers, when in chunking mode. +// +// See the comment above (*response).Write for the entire write flow. +type chunkWriter struct { + res *response + + // header is either nil or a deep clone of res.handlerHeader + // at the time of res.writeHeader, if res.writeHeader is + // called and extra buffering is being done to calculate + // Content-Type and/or Content-Length. + header Header + + // wroteHeader tells whether the header's been written to "the + // wire" (or rather: w.conn.buf). this is unlike + // (*response).wroteHeader, which tells only whether it was + // logically written. + wroteHeader bool + + // set by the writeHeader method: + chunking bool // using chunked transfer encoding for reply body +} + +var ( + crlf = []byte("\r\n") + colonSpace = []byte(": ") +) + +func (cw *chunkWriter) Write(p []byte) (n int, err error) { + if !cw.wroteHeader { + cw.writeHeader(p) + } + if cw.res.req.Method == "HEAD" { + // Eat writes. + return len(p), nil + } + if cw.chunking { + _, err = fmt.Fprintf(cw.res.conn.bufw, "%x\r\n", len(p)) + if err != nil { + cw.res.conn.rwc.Close() + return + } + } + n, err = cw.res.conn.bufw.Write(p) + if cw.chunking && err == nil { + _, err = cw.res.conn.bufw.Write(crlf) + } + if err != nil { + cw.res.conn.rwc.Close() + } + return +} + +func (cw *chunkWriter) flush() error { + if !cw.wroteHeader { + cw.writeHeader(nil) + } + return cw.res.conn.bufw.Flush() +} + +func (cw *chunkWriter) close() { + if !cw.wroteHeader { + cw.writeHeader(nil) + } + if cw.chunking { + bw := cw.res.conn.bufw // conn's bufio writer + // zero chunk to mark EOF + bw.WriteString("0\r\n") + if trailers := cw.res.finalTrailers(); trailers != nil { + trailers.Write(bw) // the writer handles noting errors + } + // final blank line after the trailers (whether + // present or not) + bw.WriteString("\r\n") + } +} + +// A response represents the server side of an HTTP response. +type response struct { + conn *conn + req *Request // request for this response + reqBody io.ReadCloser + cancelCtx context.CancelFunc // when ServeHTTP exits + wroteHeader bool // a non-1xx header has been (logically) written + wants10KeepAlive bool // HTTP/1.0 w/ Connection "keep-alive" + wantsClose bool // HTTP request has Connection "close" + + // canWriteContinue is an atomic boolean that says whether or + // not a 100 Continue header can be written to the + // connection. + // writeContinueMu must be held while writing the header. + // These two fields together synchronize the body reader (the + // expectContinueReader, which wants to write 100 Continue) + // against the main writer. + writeContinueMu sync.Mutex + canWriteContinue atomic.Bool + + w *bufio.Writer // buffers output in chunks to chunkWriter + cw chunkWriter + + // handlerHeader is the Header that Handlers get access to, + // which may be retained and mutated even after WriteHeader. + // handlerHeader is copied into cw.header at WriteHeader + // time, and privately mutated thereafter. + handlerHeader Header + calledHeader bool // handler accessed handlerHeader via Header + + written int64 // number of bytes written in body + contentLength int64 // explicitly-declared Content-Length; or -1 + status int // status code passed to WriteHeader + + // close connection after this reply. set on request and + // updated after response from handler if there's a + // "Connection: keep-alive" response header and a + // Content-Length. + closeAfterReply bool + + // When fullDuplex is false (the default), we consume any remaining + // request body before starting to write a response. + fullDuplex bool + + // requestBodyLimitHit is set by requestTooLarge when + // maxBytesReader hits its max size. It is checked in + // WriteHeader, to make sure we don't consume the + // remaining request body to try to advance to the next HTTP + // request. Instead, when this is set, we stop reading + // subsequent requests on this connection and stop reading + // input from it. + requestBodyLimitHit bool + + // trailers are the headers to be sent after the handler + // finishes writing the body. This field is initialized from + // the Trailer response header when the response header is + // written. + trailers []string + + handlerDone atomic.Bool // set true when the handler exits + + // Buffers for Date, Content-Length, and status code + dateBuf [len(TimeFormat)]byte + clenBuf [10]byte + statusBuf [3]byte + + // lazyCloseNotifyMu protects closeNotifyCh and closeNotifyTriggered. + lazyCloseNotifyMu sync.Mutex + // closeNotifyCh is the channel returned by CloseNotify. + closeNotifyCh chan bool + // closeNotifyTriggered tracks prior closeNotify calls. + closeNotifyTriggered bool + // Option for opt-in sorting headers by defined order in a special header. + enableOrderHeaders bool +} + +func (c *response) SetReadDeadline(deadline time.Time) error { + return c.conn.rwc.SetReadDeadline(deadline) +} + +func (c *response) SetWriteDeadline(deadline time.Time) error { + return c.conn.rwc.SetWriteDeadline(deadline) +} + +func (c *response) EnableFullDuplex() error { + c.fullDuplex = true + return nil +} + +// TrailerPrefix is a magic prefix for [ResponseWriter.Header] map keys +// that, if present, signals that the map entry is actually for +// the response trailers, and not the response headers. The prefix +// is stripped after the ServeHTTP call finishes and the values are +// sent in the trailers. +// +// This mechanism is intended only for trailers that are not known +// prior to the headers being written. If the set of trailers is fixed +// or known before the header is written, the normal Go trailers mechanism +// is preferred: +// +// https://pkg.go.dev/net/http#ResponseWriter +// https://pkg.go.dev/net/http#example-ResponseWriter-Trailers +const TrailerPrefix = "Trailer:" + +// finalTrailers is called after the Handler exits and returns a non-nil +// value if the Handler set any trailers. +func (w *response) finalTrailers() Header { + var t Header + for k, vv := range w.handlerHeader { + if kk, found := strings.CutPrefix(k, TrailerPrefix); found { + if t == nil { + t = make(Header) + } + t[kk] = vv + } + } + for _, k := range w.trailers { + if t == nil { + t = make(Header) + } + for _, v := range w.handlerHeader[k] { + t.Add(k, v) + } + } + return t +} + +// declareTrailer is called for each Trailer header when the +// response header is written. It notes that a header will need to be +// written in the trailers at the end of the response. +func (w *response) declareTrailer(k string) { + k = CanonicalHeaderKey(k) + if !httpguts.ValidTrailerHeader(k) { + // Forbidden by RFC 7230, section 4.1.2 + return + } + w.trailers = append(w.trailers, k) +} + +// requestTooLarge is called by maxBytesReader when too much input has +// been read from the client. +func (w *response) requestTooLarge() { + w.closeAfterReply = true + w.requestBodyLimitHit = true + if !w.wroteHeader { + w.Header().Set("Connection", "close") + } +} + +// disableWriteContinue stops Request.Body.Read from sending an automatic 100-Continue. +// If a 100-Continue is being written, it waits for it to complete before continuing. +func (w *response) disableWriteContinue() { + w.writeContinueMu.Lock() + w.canWriteContinue.Store(false) + w.writeContinueMu.Unlock() +} + +// writerOnly hides an io.Writer value's optional ReadFrom method +// from io.Copy. +type writerOnly struct { + io.Writer +} + +// ReadFrom is here to optimize copying from an [*os.File] regular file +// to a [*net.TCPConn] with sendfile, or from a supported src type such +// as a *net.TCPConn on Linux with splice. +func (w *response) ReadFrom(src io.Reader) (n int64, err error) { + buf := getCopyBuf() + defer putCopyBuf(buf) + + // Our underlying w.conn.rwc is usually a *TCPConn (with its + // own ReadFrom method). If not, just fall back to the normal + // copy method. + rf, ok := w.conn.rwc.(io.ReaderFrom) + if !ok { + return io.CopyBuffer(writerOnly{w}, src, buf) + } + + // Copy the first sniffLen bytes before switching to ReadFrom. + // This ensures we don't start writing the response before the + // source is available (see golang.org/issue/5660) and provides + // enough bytes to perform Content-Type sniffing when required. + if !w.cw.wroteHeader { + n0, err := io.CopyBuffer(writerOnly{w}, io.LimitReader(src, sniffLen), buf) + n += n0 + if err != nil || n0 < sniffLen { + return n, err + } + } + + w.w.Flush() // get rid of any previous writes + w.cw.flush() // make sure Header is written; flush data to rwc + + // Now that cw has been flushed, its chunking field is guaranteed initialized. + if !w.cw.chunking && w.bodyAllowed() && w.req.Method != "HEAD" { + n0, err := rf.ReadFrom(src) + n += n0 + w.written += n0 + return n, err + } + + n0, err := io.CopyBuffer(writerOnly{w}, src, buf) + n += n0 + return n, err +} + +// debugServerConnections controls whether all server connections are wrapped +// with a verbose logging wrapper. +const debugServerConnections = false + +// Create new connection from rwc. +func (s *Server) newConn(rwc net.Conn) *conn { + c := &conn{ + server: s, + rwc: rwc, + } + if debugServerConnections { + c.rwc = newLoggingConn("server", c.rwc) + } + return c +} + +type readResult struct { + _ incomparable + n int + err error + b byte // byte read, if n == 1 +} + +// connReader is the io.Reader wrapper used by *conn. It combines a +// selectively-activated io.LimitedReader (to bound request header +// read sizes) with support for selectively keeping an io.Reader.Read +// call blocked in a background goroutine to wait for activity and +// trigger a CloseNotifier channel. +// After a Handler has hijacked the conn and exited, connReader behaves like a +// proxy for the net.Conn and the aforementioned behavior is bypassed. +type connReader struct { + rwc net.Conn // rwc is the underlying network connection. + + mu sync.Mutex // guards following + conn *conn // conn is nil after handler exit. + hasByte bool + byteBuf [1]byte + cond *sync.Cond + inRead bool + aborted bool // set true before conn.rwc deadline is set to past + remain int64 // bytes remaining +} + +func (cr *connReader) lock() { + cr.mu.Lock() + if cr.cond == nil { + cr.cond = sync.NewCond(&cr.mu) + } +} + +func (cr *connReader) unlock() { cr.mu.Unlock() } + +func (cr *connReader) releaseConn() { + cr.lock() + defer cr.unlock() + cr.conn = nil +} + +func (cr *connReader) startBackgroundRead() { + cr.lock() + defer cr.unlock() + if cr.inRead { + panic("invalid concurrent Body.Read call") + } + if cr.hasByte { + return + } + cr.inRead = true + cr.rwc.SetReadDeadline(time.Time{}) + go cr.backgroundRead() +} + +func (cr *connReader) backgroundRead() { + n, err := cr.rwc.Read(cr.byteBuf[:]) + cr.lock() + if n == 1 { + cr.hasByte = true + // We were past the end of the previous request's body already + // (since we wouldn't be in a background read otherwise), so + // this is a pipelined HTTP request. Prior to Go 1.11 we used to + // send on the CloseNotify channel and cancel the context here, + // but the behavior was documented as only "may", and we only + // did that because that's how CloseNotify accidentally behaved + // in very early Go releases prior to context support. Once we + // added context support, people used a Handler's + // Request.Context() and passed it along. Having that context + // cancel on pipelined HTTP requests caused problems. + // Fortunately, almost nothing uses HTTP/1.x pipelining. + // Unfortunately, apt-get does, or sometimes does. + // New Go 1.11 behavior: don't fire CloseNotify or cancel + // contexts on pipelined requests. Shouldn't affect people, but + // fixes cases like Issue 23921. This does mean that a client + // closing their TCP connection after sending a pipelined + // request won't cancel the context, but we'll catch that on any + // write failure (in checkConnErrorWriter.Write). + // If the server never writes, yes, there are still contrived + // server & client behaviors where this fails to ever cancel the + // context, but that's kinda why HTTP/1.x pipelining died + // anyway. + } + if ne, ok := err.(net.Error); ok && cr.aborted && ne.Timeout() { + // Ignore this error. It's the expected error from + // another goroutine calling abortPendingRead. + } else if err != nil { + cr.handleReadErrorLocked(err) + } + cr.aborted = false + cr.inRead = false + cr.unlock() + cr.cond.Broadcast() +} + +func (cr *connReader) abortPendingRead() { + cr.lock() + defer cr.unlock() + if !cr.inRead { + return + } + cr.aborted = true + cr.rwc.SetReadDeadline(aLongTimeAgo) + for cr.inRead { + cr.cond.Wait() + } + cr.rwc.SetReadDeadline(time.Time{}) +} + +func (cr *connReader) setReadLimit(remain int64) { cr.remain = remain } +func (cr *connReader) setInfiniteReadLimit() { cr.remain = maxInt64 } +func (cr *connReader) hitReadLimit() bool { return cr.remain <= 0 } + +// handleReadErrorLocked is called whenever a Read from the client returns a +// non-nil error. +// +// The provided non-nil err is almost always io.EOF or a "use of +// closed network connection". In any case, the error is not +// particularly interesting, except perhaps for debugging during +// development. Any error means the connection is dead and we should +// down its context. +// +// The caller must hold connReader.mu. +func (cr *connReader) handleReadErrorLocked(_ error) { + if cr.conn == nil { + return + } + cr.conn.cancelCtx() + if res := cr.conn.curReq.Load(); res != nil { + res.closeNotify() + } +} + +func (cr *connReader) Read(p []byte) (n int, err error) { + cr.lock() + if cr.conn == nil { + cr.unlock() + return cr.rwc.Read(p) + } + if cr.inRead { + hijacked := cr.conn.hijacked() + cr.unlock() + if hijacked { + panic("invalid Body.Read call. After hijacked, the original Request must not be used") + } + panic("invalid concurrent Body.Read call") + } + if cr.hitReadLimit() { + cr.unlock() + return 0, io.EOF + } + if len(p) == 0 { + cr.unlock() + return 0, nil + } + if int64(len(p)) > cr.remain { + p = p[:cr.remain] + } + if cr.hasByte { + p[0] = cr.byteBuf[0] + cr.hasByte = false + cr.unlock() + return 1, nil + } + cr.inRead = true + cr.unlock() + n, err = cr.rwc.Read(p) + + cr.lock() + cr.inRead = false + if err != nil { + cr.handleReadErrorLocked(err) + } + cr.remain -= int64(n) + cr.unlock() + + cr.cond.Broadcast() + return n, err +} + +var ( + bufioReaderPool sync.Pool + bufioWriter2kPool sync.Pool + bufioWriter4kPool sync.Pool +) + +const copyBufPoolSize = 32 * 1024 + +var copyBufPool = sync.Pool{New: func() any { return new([copyBufPoolSize]byte) }} + +func getCopyBuf() []byte { + return copyBufPool.Get().(*[copyBufPoolSize]byte)[:] +} + +func putCopyBuf(b []byte) { + if len(b) != copyBufPoolSize { + panic("trying to put back buffer of the wrong size in the copyBufPool") + } + copyBufPool.Put((*[copyBufPoolSize]byte)(b)) +} + +func bufioWriterPool(size int) *sync.Pool { + switch size { + case 2 << 10: + return &bufioWriter2kPool + case 4 << 10: + return &bufioWriter4kPool + } + return nil +} + +// newBufioReader should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/gobwas/ws +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname newBufioReader +func newBufioReader(r io.Reader) *bufio.Reader { + if v := bufioReaderPool.Get(); v != nil { + br := v.(*bufio.Reader) + br.Reset(r) + return br + } + // Note: if this reader size is ever changed, update + // TestHandlerBodyClose's assumptions. + return bufio.NewReader(r) +} + +// putBufioReader should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/gobwas/ws +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname putBufioReader +func putBufioReader(br *bufio.Reader) { + br.Reset(nil) + bufioReaderPool.Put(br) +} + +// newBufioWriterSize should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/gobwas/ws +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname newBufioWriterSize +func newBufioWriterSize(w io.Writer, size int) *bufio.Writer { + pool := bufioWriterPool(size) + if pool != nil { + if v := pool.Get(); v != nil { + bw := v.(*bufio.Writer) + bw.Reset(w) + return bw + } + } + return bufio.NewWriterSize(w, size) +} + +// putBufioWriter should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/gobwas/ws +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname putBufioWriter +func putBufioWriter(bw *bufio.Writer) { + bw.Reset(nil) + if pool := bufioWriterPool(bw.Available()); pool != nil { + pool.Put(bw) + } +} + +// DefaultMaxHeaderBytes is the maximum permitted size of the headers +// in an HTTP request. +// This can be overridden by setting [Server.MaxHeaderBytes]. +const DefaultMaxHeaderBytes = 1 << 20 // 1 MB + +func (s *Server) maxHeaderBytes() int { + if s.MaxHeaderBytes > 0 { + return s.MaxHeaderBytes + } + return DefaultMaxHeaderBytes +} + +func (s *Server) initialReadLimitSize() int64 { + return int64(s.maxHeaderBytes()) + 4096 // bufio slop +} + +// tlsHandshakeTimeout returns the time limit permitted for the TLS +// handshake, or zero for unlimited. +// +// It returns the minimum of any positive ReadHeaderTimeout, +// ReadTimeout, or WriteTimeout. +func (s *Server) tlsHandshakeTimeout() time.Duration { + var ret time.Duration + for _, v := range [...]time.Duration{ + s.ReadHeaderTimeout, + s.ReadTimeout, + s.WriteTimeout, + } { + if v <= 0 { + continue + } + if ret == 0 || v < ret { + ret = v + } + } + return ret +} + +// wrapper around io.ReadCloser which on first read, sends an +// HTTP/1.1 100 Continue header +type expectContinueReader struct { + resp *response + readCloser io.ReadCloser + closed atomic.Bool + sawEOF atomic.Bool +} + +func (ecr *expectContinueReader) Read(p []byte) (n int, err error) { + if ecr.closed.Load() { + return 0, ErrBodyReadAfterClose + } + w := ecr.resp + if w.canWriteContinue.Load() { + w.writeContinueMu.Lock() + if w.canWriteContinue.Load() { + w.conn.bufw.WriteString("HTTP/1.1 100 Continue\r\n\r\n") + w.conn.bufw.Flush() + w.canWriteContinue.Store(false) + } + w.writeContinueMu.Unlock() + } + n, err = ecr.readCloser.Read(p) + if err == io.EOF { + ecr.sawEOF.Store(true) + } + return +} + +func (ecr *expectContinueReader) Close() error { + ecr.closed.Store(true) + return ecr.readCloser.Close() +} + +// TimeFormat is the time format to use when generating times in HTTP +// headers. It is like [time.RFC1123] but hard-codes GMT as the time +// zone. The time being formatted must be in UTC for Format to +// generate the correct format. +// +// For parsing this time format, see [ParseTime]. +const TimeFormat = "Mon, 02 Jan 2006 15:04:05 GMT" + +var errTooLarge = errors.New("http: request too large") + +// Read next request from connection. +func (c *conn) readRequest(ctx context.Context) (w *response, err error) { + if c.hijacked() { + return nil, ErrHijacked + } + + var ( + wholeReqDeadline time.Time // or zero if none + hdrDeadline time.Time // or zero if none + ) + t0 := time.Now() + if d := c.server.readHeaderTimeout(); d > 0 { + hdrDeadline = t0.Add(d) + } + if d := c.server.ReadTimeout; d > 0 { + wholeReqDeadline = t0.Add(d) + } + c.rwc.SetReadDeadline(hdrDeadline) + if d := c.server.WriteTimeout; d > 0 { + defer func() { + c.rwc.SetWriteDeadline(time.Now().Add(d)) + }() + } + + c.r.setReadLimit(c.server.initialReadLimitSize()) + if c.lastMethod == "POST" { + // RFC 7230 section 3 tolerance for old buggy clients. + peek, _ := c.bufr.Peek(4) // ReadRequest will get err below + c.bufr.Discard(numLeadingCRorLF(peek)) + } + req, err := readRequest(c.bufr) + if err != nil { + if c.r.hitReadLimit() { + return nil, errTooLarge + } + return nil, err + } + + if !http1ServerSupportsRequest(req) { + return nil, statusError{StatusHTTPVersionNotSupported, "unsupported protocol version"} + } + + c.lastMethod = req.Method + c.r.setInfiniteReadLimit() + + hosts, haveHost := req.Header["Host"] + isH2Upgrade := req.isH2Upgrade() + if req.ProtoAtLeast(1, 1) && (!haveHost || len(hosts) == 0) && !isH2Upgrade && req.Method != "CONNECT" { + return nil, badRequestError("missing required Host header") + } + if len(hosts) == 1 && !httpguts.ValidHostHeader(hosts[0]) { + return nil, badRequestError("malformed Host header") + } + for k, vv := range req.Header { + if !httpguts.ValidHeaderFieldName(k) { + return nil, badRequestError("invalid header name") + } + for _, v := range vv { + if !httpguts.ValidHeaderFieldValue(v) { + return nil, badRequestError("invalid header value") + } + } + } + delete(req.Header, "Host") + + ctx, cancelCtx := context.WithCancel(ctx) + req.ctx = ctx + req.RemoteAddr = c.remoteAddr + req.TLS = c.tlsState + if body, ok := req.Body.(*body); ok { + body.doEarlyClose = true + } + + // Adjust the read deadline if necessary. + if !hdrDeadline.Equal(wholeReqDeadline) { + c.rwc.SetReadDeadline(wholeReqDeadline) + } + + w = &response{ + conn: c, + cancelCtx: cancelCtx, + req: req, + reqBody: req.Body, + handlerHeader: make(Header), + contentLength: -1, + + // We populate these ahead of time so we're not + // reading from req.Header after their Handler starts + // and maybe mutates it (Issue 14940) + wants10KeepAlive: req.wantsHttp10KeepAlive(), + wantsClose: req.wantsClose(), + } + if isH2Upgrade { + w.closeAfterReply = true + } + w.cw.res = w + w.w = newBufioWriterSize(&w.cw, bufferBeforeChunkingSize) + return w, nil +} + +// http1ServerSupportsRequest reports whether Go's HTTP/1.x server +// supports the given request. +func http1ServerSupportsRequest(req *Request) bool { + if req.ProtoMajor == 1 { + return true + } + // Accept "PRI * HTTP/2.0" upgrade requests, so Handlers can + // wire up their own HTTP/2 upgrades. + if req.ProtoMajor == 2 && req.ProtoMinor == 0 && + req.Method == "PRI" && req.RequestURI == "*" { + return true + } + // Reject HTTP/0.x, and all other HTTP/2+ requests (which + // aren't encoded in ASCII anyway). + return false +} + +func (w *response) Header() Header { + if w.cw.header == nil && w.wroteHeader && !w.cw.wroteHeader { + // Accessing the header between logically writing it + // and physically writing it means we need to allocate + // a clone to snapshot the logically written state. + w.cw.header = w.handlerHeader.Clone() + } + w.calledHeader = true + return w.handlerHeader +} + +// maxPostHandlerReadBytes is the max number of Request.Body bytes not +// consumed by a handler that the server will read from the client +// in order to keep a connection alive. If there are more bytes +// than this, the server, to be paranoid, instead sends a +// "Connection close" response. +// +// This number is approximately what a typical machine's TCP buffer +// size is anyway. (if we have the bytes on the machine, we might as +// well read them) +const maxPostHandlerReadBytes = 256 << 10 + +func checkWriteHeaderCode(code int) { + // Issue 22880: require valid WriteHeader status codes. + // For now we only enforce that it's three digits. + // In the future we might block things over 599 (600 and above aren't defined + // at https://httpwg.org/specs/rfc7231.html#status.codes). + // But for now any three digits. + // + // We used to send "HTTP/1.1 000 0" on the wire in responses but there's + // no equivalent bogus thing we can realistically send in HTTP/2, + // so we'll consistently panic instead and help people find their bugs + // early. (We can't return an error from WriteHeader even if we wanted to.) + if code < 100 || code > 999 { + panic(fmt.Sprintf("invalid WriteHeader code %v", code)) + } +} + +// relevantCaller searches the call stack for the first function outside of net/http. +// The purpose of this function is to provide more helpful error messages. +func relevantCaller() runtime.Frame { + pc := make([]uintptr, 16) + n := runtime.Callers(1, pc) + frames := runtime.CallersFrames(pc[:n]) + var frame runtime.Frame + for { + frame, more := frames.Next() + if !strings.HasPrefix(frame.Function, "net/http.") { + return frame + } + if !more { + break + } + } + return frame +} + +func (w *response) WriteHeader(code int) { + // Check if the order headers option has been disabled. + if _, ok := w.handlerHeader[HeaderOrderKey]; ok && !w.enableOrderHeaders { + delete(w.handlerHeader, HeaderOrderKey) + } + + if w.conn.hijacked() { + caller := relevantCaller() + w.conn.server.logf("http: response.WriteHeader on hijacked connection from %s (%s:%d)", caller.Function, path.Base(caller.File), caller.Line) + return + } + if w.wroteHeader { + caller := relevantCaller() + w.conn.server.logf("http: superfluous response.WriteHeader call from %s (%s:%d)", caller.Function, path.Base(caller.File), caller.Line) + return + } + checkWriteHeaderCode(code) + + if code < 101 || code > 199 { + // Sending a 100 Continue or any non-1xx header disables the + // automatically-sent 100 Continue from Request.Body.Read. + w.disableWriteContinue() + } + + // Handle informational headers. + // + // We shouldn't send any further headers after 101 Switching Protocols, + // so it takes the non-informational path. + if code >= 100 && code <= 199 && code != StatusSwitchingProtocols { + writeStatusLine(w.conn.bufw, w.req.ProtoAtLeast(1, 1), code, w.statusBuf[:]) + + // Per RFC 8297 we must not clear the current header map + w.handlerHeader.WriteSubset(w.conn.bufw, excludedHeadersNoBody) + w.conn.bufw.Write(crlf) + w.conn.bufw.Flush() + + return + } + + w.wroteHeader = true + w.status = code + + if w.calledHeader && w.cw.header == nil { + w.cw.header = w.handlerHeader.Clone() + } + + if cl := w.handlerHeader.get("Content-Length"); cl != "" { + v, err := strconv.ParseInt(cl, 10, 64) + if err == nil && v >= 0 { + w.contentLength = v + } else { + w.conn.server.logf("http: invalid Content-Length of %q", cl) + w.handlerHeader.Del("Content-Length") + } + } +} + +// extraHeader is the set of headers sometimes added by chunkWriter.writeHeader. +// This type is used to avoid extra allocations from cloning and/or populating +// the response Header map and all its 1-element slices. +type extraHeader struct { + contentType string + connection string + transferEncoding string + date []byte // written if not nil + contentLength []byte // written if not nil +} + +// Sorted the same as extraHeader.Write's loop. +var extraHeaderKeys = [][]byte{ + []byte("Content-Type"), + []byte("Connection"), + []byte("Transfer-Encoding"), +} + +var ( + headerContentLength = []byte("Content-Length: ") + headerDate = []byte("Date: ") +) + +// Write writes the headers described in h to w. +// +// This method has a value receiver, despite the somewhat large size +// of h, because it prevents an allocation. The escape analysis isn't +// smart enough to realize this function doesn't mutate h. +func (h extraHeader) Write(w *bufio.Writer) { + if h.date != nil { + w.Write(headerDate) + w.Write(h.date) + w.Write(crlf) + } + if h.contentLength != nil { + w.Write(headerContentLength) + w.Write(h.contentLength) + w.Write(crlf) + } + for i, v := range []string{h.contentType, h.connection, h.transferEncoding} { + if v != "" { + w.Write(extraHeaderKeys[i]) + w.Write(colonSpace) + w.WriteString(v) + w.Write(crlf) + } + } +} + +// writeHeader finalizes the header sent to the client and writes it +// to cw.res.conn.bufw. +// +// p is not written by writeHeader, but is the first chunk of the body +// that will be written. It is sniffed for a Content-Type if none is +// set explicitly. It's also used to set the Content-Length, if the +// total body size was small and the handler has already finished +// running. +func (cw *chunkWriter) writeHeader(p []byte) { + if cw.wroteHeader { + return + } + cw.wroteHeader = true + + w := cw.res + keepAlivesEnabled := w.conn.server.doKeepAlives() + isHEAD := w.req.Method == "HEAD" + + // header is written out to w.conn.buf below. Depending on the + // state of the handler, we either own the map or not. If we + // don't own it, the exclude map is created lazily for + // WriteSubset to remove headers. The setHeader struct holds + // headers we need to add. + header := cw.header + owned := header != nil + if !owned { + header = w.handlerHeader + } + var excludeHeader map[string]bool + delHeader := func(key string) { + if owned { + header.Del(key) + return + } + if _, ok := header[key]; !ok { + return + } + if excludeHeader == nil { + excludeHeader = make(map[string]bool) + } + excludeHeader[key] = true + } + var setHeader extraHeader + + // Don't write out the fake "Trailer:foo" keys. See TrailerPrefix. + trailers := false + for k := range cw.header { + if strings.HasPrefix(k, TrailerPrefix) { + if excludeHeader == nil { + excludeHeader = make(map[string]bool) + } + excludeHeader[k] = true + trailers = true + } + } + for _, v := range cw.header["Trailer"] { + trailers = true + foreachHeaderElement(v, cw.res.declareTrailer) + } + + te := header.get("Transfer-Encoding") + hasTE := te != "" + + // If the handler is done but never sent a Content-Length + // response header and this is our first (and last) write, set + // it, even to zero. This helps HTTP/1.0 clients keep their + // "keep-alive" connections alive. + // Exceptions: 304/204/1xx responses never get Content-Length, and if + // it was a HEAD request, we don't know the difference between + // 0 actual bytes and 0 bytes because the handler noticed it + // was a HEAD request and chose not to write anything. So for + // HEAD, the handler should either write the Content-Length or + // write non-zero bytes. If it's actually 0 bytes and the + // handler never looked at the Request.Method, we just don't + // send a Content-Length header. + // Further, we don't send an automatic Content-Length if they + // set a Transfer-Encoding, because they're generally incompatible. + if w.handlerDone.Load() && !trailers && !hasTE && bodyAllowedForStatus(w.status) && !header.has("Content-Length") && (!isHEAD || len(p) > 0) { + w.contentLength = int64(len(p)) + setHeader.contentLength = strconv.AppendInt(cw.res.clenBuf[:0], int64(len(p)), 10) + } + + // If this was an HTTP/1.0 request with keep-alive and we sent a + // Content-Length back, we can make this a keep-alive response ... + if w.wants10KeepAlive && keepAlivesEnabled { + sentLength := header.get("Content-Length") != "" + if sentLength && header.get("Connection") == "keep-alive" { + w.closeAfterReply = false + } + } + + // Check for an explicit (and valid) Content-Length header. + hasCL := w.contentLength != -1 + + if w.wants10KeepAlive && (isHEAD || hasCL || !bodyAllowedForStatus(w.status)) { + _, connectionHeaderSet := header["Connection"] + if !connectionHeaderSet { + setHeader.connection = "keep-alive" + } + } else if !w.req.ProtoAtLeast(1, 1) || w.wantsClose { + w.closeAfterReply = true + } + + if header.get("Connection") == "close" || !keepAlivesEnabled { + w.closeAfterReply = true + } + + // If the client wanted a 100-continue but we never sent it to + // them (or, more strictly: we never finished reading their + // request body), don't reuse this connection. + // + // This behavior was first added on the theory that we don't know + // if the next bytes on the wire are going to be the remainder of + // the request body or the subsequent request (see issue 11549), + // but that's not correct: If we keep using the connection, + // the client is required to send the request body whether we + // asked for it or not. + // + // We probably do want to skip reusing the connection in most cases, + // however. If the client is offering a large request body that we + // don't intend to use, then it's better to close the connection + // than to read the body. For now, assume that if we're sending + // headers, the handler is done reading the body and we should + // drop the connection if we haven't seen EOF. + if ecr, ok := w.req.Body.(*expectContinueReader); ok && !ecr.sawEOF.Load() { + w.closeAfterReply = true + } + + // We do this by default because there are a number of clients that + // send a full request before starting to read the response, and they + // can deadlock if we start writing the response with unconsumed body + // remaining. See Issue 15527 for some history. + // + // If full duplex mode has been enabled with ResponseController.EnableFullDuplex, + // then leave the request body alone. + // + // We don't take this path when w.closeAfterReply is set. + // We may not need to consume the request to get ready for the next one + // (since we're closing the conn), but a client which sends a full request + // before reading a response may deadlock in this case. + // This behavior has been present since CL 5268043 (2011), however, + // so it doesn't seem to be causing problems. + if w.req.ContentLength != 0 && !w.closeAfterReply && !w.fullDuplex { + var discard, tooBig bool + + switch bdy := w.req.Body.(type) { + case *expectContinueReader: + // We only get here if we have already fully consumed the request body + // (see above). + case *body: + bdy.mu.Lock() + switch { + case bdy.closed: + if !bdy.sawEOF { + // Body was closed in handler with non-EOF error. + w.closeAfterReply = true + } + case bdy.unreadDataSizeLocked() >= maxPostHandlerReadBytes: + tooBig = true + default: + discard = true + } + bdy.mu.Unlock() + default: + discard = true + } + + if discard { + _, err := io.CopyN(io.Discard, w.reqBody, maxPostHandlerReadBytes+1) + switch err { + case nil: + // There must be even more data left over. + tooBig = true + case ErrBodyReadAfterClose: + // Body was already consumed and closed. + case io.EOF: + // The remaining body was just consumed, close it. + err = w.reqBody.Close() + if err != nil { + w.closeAfterReply = true + } + default: + // Some other kind of error occurred, like a read timeout, or + // corrupt chunked encoding. In any case, whatever remains + // on the wire must not be parsed as another HTTP request. + w.closeAfterReply = true + } + } + + if tooBig { + w.requestTooLarge() + delHeader("Connection") + setHeader.connection = "close" + } + } + + code := w.status + if bodyAllowedForStatus(code) { + // If no content type, apply sniffing algorithm to body. + _, haveType := header["Content-Type"] + + // If the Content-Encoding was set and is non-blank, + // we shouldn't sniff the body. See Issue 31753. + ce := header.Get("Content-Encoding") + hasCE := len(ce) > 0 + if !hasCE && !haveType && !hasTE && len(p) > 0 { + setHeader.contentType = DetectContentType(p) + } + } else { + for _, k := range suppressedHeaders(code) { + delHeader(k) + } + } + + if !header.has("Date") { + setHeader.date = time.Now().UTC().AppendFormat(cw.res.dateBuf[:0], TimeFormat) + } + + if hasCL && hasTE && te != "identity" { + // TODO: return an error if WriteHeader gets a return parameter + // For now just ignore the Content-Length. + w.conn.server.logf("http: WriteHeader called with both Transfer-Encoding of %q and a Content-Length of %d", + te, w.contentLength) + delHeader("Content-Length") + hasCL = false + } + + if w.req.Method == "HEAD" || !bodyAllowedForStatus(code) || code == StatusNoContent { + // Response has no body. + delHeader("Transfer-Encoding") + } else if hasCL { + // Content-Length has been provided, so no chunking is to be done. + delHeader("Transfer-Encoding") + } else if w.req.ProtoAtLeast(1, 1) { + // HTTP/1.1 or greater: Transfer-Encoding has been set to identity, and no + // content-length has been provided. The connection must be closed after the + // reply is written, and no chunking is to be done. This is the setup + // recommended in the Server-Sent Events candidate recommendation 11, + // section 8. + if hasTE && te == "identity" { + cw.chunking = false + w.closeAfterReply = true + delHeader("Transfer-Encoding") + } else { + // HTTP/1.1 or greater: use chunked transfer encoding + // to avoid closing the connection at EOF. + cw.chunking = true + setHeader.transferEncoding = "chunked" + if hasTE && te == "chunked" { + // We will send the chunked Transfer-Encoding header later. + delHeader("Transfer-Encoding") + } + } + } else { + // HTTP version < 1.1: cannot do chunked transfer + // encoding and we don't know the Content-Length so + // signal EOF by closing connection. + w.closeAfterReply = true + delHeader("Transfer-Encoding") // in case already set + } + + // Cannot use Content-Length with non-identity Transfer-Encoding. + if cw.chunking { + delHeader("Content-Length") + } + if !w.req.ProtoAtLeast(1, 0) { + return + } + + // Only override the Connection header if it is not a successful + // protocol switch response and if KeepAlives are not enabled. + // See https://golang.org/issue/36381. + delConnectionHeader := w.closeAfterReply && + (!keepAlivesEnabled || !hasToken(cw.header.get("Connection"), "close")) && + !isProtocolSwitchResponse(w.status, header) + if delConnectionHeader { + delHeader("Connection") + if w.req.ProtoAtLeast(1, 1) { + setHeader.connection = "close" + } + } + + writeStatusLine(w.conn.bufw, w.req.ProtoAtLeast(1, 1), code, w.statusBuf[:]) + cw.header.WriteSubset(w.conn.bufw, excludeHeader) + setHeader.Write(w.conn.bufw) + w.conn.bufw.Write(crlf) +} + +// foreachHeaderElement splits v according to the "#rule" construction +// in RFC 7230 section 7 and calls fn for each non-empty element. +func foreachHeaderElement(v string, fn func(string)) { + v = textproto.TrimString(v) + if v == "" { + return + } + if !strings.Contains(v, ",") { + fn(v) + return + } + for f := range strings.SplitSeq(v, ",") { + if f = textproto.TrimString(f); f != "" { + fn(f) + } + } +} + +// writeStatusLine writes an HTTP/1.x Status-Line (RFC 7230 Section 3.1.2) +// to bw. is11 is whether the HTTP request is HTTP/1.1. false means HTTP/1.0. +// code is the response status code. +// scratch is an optional scratch buffer. If it has at least capacity 3, it's used. +func writeStatusLine(bw *bufio.Writer, is11 bool, code int, scratch []byte) { + if is11 { + bw.WriteString("HTTP/1.1 ") + } else { + bw.WriteString("HTTP/1.0 ") + } + if text := StatusText(code); text != "" { + bw.Write(strconv.AppendInt(scratch[:0], int64(code), 10)) + bw.WriteByte(' ') + bw.WriteString(text) + bw.WriteString("\r\n") + } else { + // don't worry about performance + fmt.Fprintf(bw, "%03d status code %d\r\n", code, code) + } +} + +// bodyAllowed reports whether a Write is allowed for this response type. +// It's illegal to call this before the header has been flushed. +func (w *response) bodyAllowed() bool { + if !w.wroteHeader { + panic("") + } + return bodyAllowedForStatus(w.status) +} + +// The Life Of A Write is like this: +// +// Handler starts. No header has been sent. The handler can either +// write a header, or just start writing. Writing before sending a header +// sends an implicitly empty 200 OK header. +// +// If the handler didn't declare a Content-Length up front, we either +// go into chunking mode or, if the handler finishes running before +// the chunking buffer size, we compute a Content-Length and send that +// in the header instead. +// +// Likewise, if the handler didn't set a Content-Type, we sniff that +// from the initial chunk of output. +// +// The Writers are wired together like: +// +// 1. *response (the ResponseWriter) -> +// 2. (*response).w, a [*bufio.Writer] of bufferBeforeChunkingSize bytes -> +// 3. chunkWriter.Writer (whose writeHeader finalizes Content-Length/Type) +// and which writes the chunk headers, if needed -> +// 4. conn.bufw, a *bufio.Writer of default (4kB) bytes, writing to -> +// 5. checkConnErrorWriter{c}, which notes any non-nil error on Write +// and populates c.werr with it if so, but otherwise writes to -> +// 6. the rwc, the [net.Conn]. +// +// TODO(bradfitz): short-circuit some of the buffering when the +// initial header contains both a Content-Type and Content-Length. +// Also short-circuit in (1) when the header's been sent and not in +// chunking mode, writing directly to (4) instead, if (2) has no +// buffered data. More generally, we could short-circuit from (1) to +// (3) even in chunking mode if the write size from (1) is over some +// threshold and nothing is in (2). The answer might be mostly making +// bufferBeforeChunkingSize smaller and having bufio's fast-paths deal +// with this instead. +func (w *response) Write(data []byte) (n int, err error) { + return w.write(len(data), data, "") +} + +func (w *response) WriteString(data string) (n int, err error) { + return w.write(len(data), nil, data) +} + +// either dataB or dataS is non-zero. +func (w *response) write(lenData int, dataB []byte, dataS string) (n int, err error) { + if w.conn.hijacked() { + if lenData > 0 { + caller := relevantCaller() + w.conn.server.logf("http: response.Write on hijacked connection from %s (%s:%d)", caller.Function, path.Base(caller.File), caller.Line) + } + return 0, ErrHijacked + } + + if w.canWriteContinue.Load() { + // Body reader wants to write 100 Continue but hasn't yet. Tell it not to. + w.disableWriteContinue() + } + + if !w.wroteHeader { + w.WriteHeader(StatusOK) + } + if lenData == 0 { + return 0, nil + } + if !w.bodyAllowed() { + return 0, ErrBodyNotAllowed + } + + w.written += int64(lenData) // ignoring errors, for errorKludge + if w.contentLength != -1 && w.written > w.contentLength { + return 0, ErrContentLength + } + if dataB != nil { + return w.w.Write(dataB) + } else { + return w.w.WriteString(dataS) + } +} + +func (w *response) finishRequest() { + w.handlerDone.Store(true) + + if !w.wroteHeader { + w.WriteHeader(StatusOK) + } + + w.w.Flush() + putBufioWriter(w.w) + w.cw.close() + w.conn.bufw.Flush() + + w.conn.r.abortPendingRead() + + // Close the body (regardless of w.closeAfterReply) so we can + // re-use its bufio.Reader later safely. + w.reqBody.Close() + + if w.req.MultipartForm != nil { + w.req.MultipartForm.RemoveAll() + } +} + +// shouldReuseConnection reports whether the underlying TCP connection can be reused. +// It must only be called after the handler is done executing. +func (w *response) shouldReuseConnection() bool { + if w.closeAfterReply { + // The request or something set while executing the + // handler indicated we shouldn't reuse this + // connection. + return false + } + + if w.req.Method != "HEAD" && w.contentLength != -1 && w.bodyAllowed() && w.contentLength != w.written { + // Did not write enough. Avoid getting out of sync. + return false + } + + // There was some error writing to the underlying connection + // during the request, so don't re-use this conn. + if w.conn.werr != nil { + return false + } + + if w.closedRequestBodyEarly() { + return false + } + + return true +} + +func (w *response) closedRequestBodyEarly() bool { + body, ok := w.req.Body.(*body) + return ok && body.didEarlyClose() +} + +func (w *response) Flush() { + w.FlushError() +} + +func (w *response) FlushError() error { + if !w.wroteHeader { + w.WriteHeader(StatusOK) + } + err := w.w.Flush() + e2 := w.cw.flush() + if err == nil { + err = e2 + } + return err +} + +func (c *conn) finalFlush() { + if c.bufr != nil { + // Steal the bufio.Reader (~4KB worth of memory) and its associated + // reader for a future connection. + putBufioReader(c.bufr) + c.bufr = nil + } + + if c.bufw != nil { + c.bufw.Flush() + // Steal the bufio.Writer (~4KB worth of memory) and its associated + // writer for a future connection. + putBufioWriter(c.bufw) + c.bufw = nil + } +} + +// Close the connection. +func (c *conn) close() { + c.finalFlush() + c.rwc.Close() +} + +// rstAvoidanceDelay is the amount of time we sleep after closing the +// write side of a TCP connection before closing the entire socket. +// By sleeping, we increase the chances that the client sees our FIN +// and processes its final data before they process the subsequent RST +// from closing a connection with known unread data. +// This RST seems to occur mostly on BSD systems. (And Windows?) +// This timeout is somewhat arbitrary (~latency around the planet), +// and may be modified by tests. +// +// TODO(bcmills): This should arguably be a server configuration parameter, +// not a hard-coded value. +var rstAvoidanceDelay = 500 * time.Millisecond + +type closeWriter interface { + CloseWrite() error +} + +var _ closeWriter = (*net.TCPConn)(nil) + +// closeWriteAndWait flushes any outstanding data and sends a FIN packet (if +// client is connected via TCP), signaling that we're done. We then +// pause for a bit, hoping the client processes it before any +// subsequent RST. +// +// See https://golang.org/issue/3595 +func (c *conn) closeWriteAndWait() { + c.finalFlush() + if tcp, ok := c.rwc.(closeWriter); ok { + tcp.CloseWrite() + } + + // When we return from closeWriteAndWait, the caller will fully close the + // connection. If client is still writing to the connection, this will cause + // the write to fail with ECONNRESET or similar. Unfortunately, many TCP + // implementations will also drop unread packets from the client's read buffer + // when a write fails, causing our final response to be truncated away too. + // + // As a result, https://www.rfc-editor.org/rfc/rfc7230#section-6.6 recommends + // that “[t]he server … continues to read from the connection until it + // receives a corresponding close by the client, or until the server is + // reasonably certain that its own TCP stack has received the client's + // acknowledgement of the packet(s) containing the server's last response.” + // + // Unfortunately, we have no straightforward way to be “reasonably certain” + // that we have received the client's ACK, and at any rate we don't want to + // allow a misbehaving client to soak up server connections indefinitely by + // withholding an ACK, nor do we want to go through the complexity or overhead + // of using low-level APIs to figure out when a TCP round-trip has completed. + // + // Instead, we declare that we are “reasonably certain” that we received the + // ACK if maxRSTAvoidanceDelay has elapsed. + time.Sleep(rstAvoidanceDelay) +} + +// validNextProto reports whether the proto is a valid ALPN protocol name. +// Everything is valid except the empty string and built-in protocol types, +// so that those can't be overridden with alternate implementations. +func validNextProto(proto string) bool { + switch proto { + case "", "http/1.1", "http/1.0": + return false + } + return true +} + +const ( + runHooks = true + skipHooks = false +) + +func (c *conn) setState(nc net.Conn, state ConnState, runHook bool) { + srv := c.server + switch state { + case StateNew: + srv.trackConn(c, true) + case StateHijacked, StateClosed: + srv.trackConn(c, false) + } + if state > 0xff || state < 0 { + panic("internal error") + } + packedState := uint64(time.Now().Unix()<<8) | uint64(state) + c.curState.Store(packedState) + if !runHook { + return + } + if hook := srv.ConnState; hook != nil { + hook(nc, state) + } +} + +func (c *conn) getState() (state ConnState, unixSec int64) { + packedState := c.curState.Load() + return ConnState(packedState & 0xff), int64(packedState >> 8) +} + +// badRequestError is a literal string (used by in the server in HTML, +// unescaped) to tell the user why their request was bad. It should +// be plain text without user info or other embedded errors. +func badRequestError(e string) error { return statusError{StatusBadRequest, e} } + +// statusError is an error used to respond to a request with an HTTP status. +// The text should be plain text without user info or other embedded errors. +type statusError struct { + code int + text string +} + +func (e statusError) Error() string { return StatusText(e.code) + ": " + e.text } + +// ErrAbortHandler is a sentinel panic value to abort a handler. +// While any panic from ServeHTTP aborts the response to the client, +// panicking with ErrAbortHandler also suppresses logging of a stack +// trace to the server's error log. +var ErrAbortHandler = errors.New("net/http: abort Handler") + +// isCommonNetReadError reports whether err is a common error +// encountered during reading a request off the network when the +// client has gone away or had its read fail somehow. This is used to +// determine which logs are interesting enough to log about. +func isCommonNetReadError(err error) bool { + if err == io.EOF { + return true + } + if neterr, ok := err.(net.Error); ok && neterr.Timeout() { + return true + } + if oe, ok := err.(*net.OpError); ok && oe.Op == "read" { + return true + } + return false +} + +type connectionStater interface { + ConnectionState() tls.ConnectionState +} + +// Serve a new connection. +func (c *conn) serve(ctx context.Context) { + if ra := c.rwc.RemoteAddr(); ra != nil { + c.remoteAddr = ra.String() + } + ctx = context.WithValue(ctx, LocalAddrContextKey, c.rwc.LocalAddr()) + var inFlightResponse *response + defer func() { + if err := recover(); err != nil && err != ErrAbortHandler { + const size = 64 << 10 + buf := make([]byte, size) + buf = buf[:runtime.Stack(buf, false)] + c.server.logf("http: panic serving %v: %v\n%s", c.remoteAddr, err, buf) + } + if inFlightResponse != nil { + inFlightResponse.cancelCtx() + inFlightResponse.disableWriteContinue() + } + if !c.hijacked() { + if inFlightResponse != nil { + inFlightResponse.conn.r.abortPendingRead() + inFlightResponse.reqBody.Close() + } + c.close() + c.setState(c.rwc, StateClosed, runHooks) + } + }() + + if tlsConn, ok := c.rwc.(*tls.Conn); ok { + tlsTO := c.server.tlsHandshakeTimeout() + if tlsTO > 0 { + dl := time.Now().Add(tlsTO) + c.rwc.SetReadDeadline(dl) + c.rwc.SetWriteDeadline(dl) + } + if err := tlsConn.HandshakeContext(ctx); err != nil { + // If the handshake failed due to the client not speaking + // TLS, assume they're speaking plaintext HTTP and write a + // 400 response on the TLS conn's underlying net.Conn. + var reason string + if re, ok := err.(tls.RecordHeaderError); ok && re.Conn != nil && tlsRecordHeaderLooksLikeHTTP(re.RecordHeader) { + io.WriteString(re.Conn, "HTTP/1.0 400 Bad Request\r\n\r\nClient sent an HTTP request to an HTTPS server.\n") + re.Conn.Close() + reason = "client sent an HTTP request to an HTTPS server" + } else { + reason = err.Error() + } + c.server.logf("http: TLS handshake error from %s: %v", c.rwc.RemoteAddr(), reason) + return + } + // Restore Conn-level deadlines. + if tlsTO > 0 { + c.rwc.SetReadDeadline(time.Time{}) + c.rwc.SetWriteDeadline(time.Time{}) + } + c.tlsState = new(tls.ConnectionState) + *c.tlsState = tlsConn.ConnectionState() + if proto := c.tlsState.NegotiatedProtocol; validNextProto(proto) { + if fn := c.server.TLSNextProto[proto]; fn != nil { + h := initALPNRequest{ctx, tlsConn, serverHandler{c.server}} + // Mark freshly created HTTP/2 as active and prevent any server state hooks + // from being run on these connections. This prevents closeIdleConns from + // closing such connections. See issue https://golang.org/issue/39776. + c.setState(c.rwc, StateActive, skipHooks) + fn(c.server, tlsConn, h) + } + return + } + } + + // HTTP/1.x from here on. + + // Set Request.TLS if the conn is not a *tls.Conn, but implements ConnectionState. + if c.tlsState == nil { + if tc, ok := c.rwc.(connectionStater); ok { + c.tlsState = new(tls.ConnectionState) + *c.tlsState = tc.ConnectionState() + } + } + + ctx, cancelCtx := context.WithCancel(ctx) + c.cancelCtx = cancelCtx + defer cancelCtx() + + c.r = &connReader{conn: c, rwc: c.rwc} + c.bufr = newBufioReader(c.r) + c.bufw = newBufioWriterSize(checkConnErrorWriter{c}, 4<<10) + + protos := c.server.protocols() + if c.tlsState == nil && protos.UnencryptedHTTP2() { + if c.maybeServeUnencryptedHTTP2(ctx) { + return + } + } + if !protos.HTTP1() { + return + } + + for { + w, err := c.readRequest(ctx) + if c.r.remain != c.server.initialReadLimitSize() { + // If we read any bytes off the wire, we're active. + c.setState(c.rwc, StateActive, runHooks) + } + if c.server.shuttingDown() { + return + } + if err != nil { + const errorHeaders = "\r\nContent-Type: text/plain; charset=utf-8\r\nConnection: close\r\n\r\n" + + switch { + case err == errTooLarge: + // Their HTTP client may or may not be + // able to read this if we're + // responding to them and hanging up + // while they're still writing their + // request. Undefined behavior. + const publicErr = "431 Request Header Fields Too Large" + fmt.Fprintf(c.rwc, "HTTP/1.1 "+publicErr+errorHeaders+publicErr) + c.closeWriteAndWait() + return + + case isUnsupportedTEError(err): + // Respond as per RFC 7230 Section 3.3.1 which says, + // A server that receives a request message with a + // transfer coding it does not understand SHOULD + // respond with 501 (Unimplemented). + code := StatusNotImplemented + + // We purposefully aren't echoing back the transfer-encoding's value, + // so as to mitigate the risk of cross side scripting by an attacker. + fmt.Fprintf(c.rwc, "HTTP/1.1 %d %s%sUnsupported transfer encoding", code, StatusText(code), errorHeaders) + return + + case isCommonNetReadError(err): + return // don't reply + + default: + if v, ok := err.(statusError); ok { + fmt.Fprintf(c.rwc, "HTTP/1.1 %d %s: %s%s%d %s: %s", v.code, StatusText(v.code), v.text, errorHeaders, v.code, StatusText(v.code), v.text) + return + } + const publicErr = "400 Bad Request" + fmt.Fprintf(c.rwc, "HTTP/1.1 "+publicErr+errorHeaders+publicErr) + return + } + } + + // Expect 100 Continue support + req := w.req + if req.expectsContinue() { + if req.ProtoAtLeast(1, 1) && req.ContentLength != 0 { + // Wrap the Body reader with one that replies on the connection + req.Body = &expectContinueReader{readCloser: req.Body, resp: w} + w.canWriteContinue.Store(true) + } + } else if req.Header.get("Expect") != "" { + w.sendExpectationFailed() + return + } + + c.curReq.Store(w) + + if requestBodyRemains(req.Body) { + registerOnHitEOF(req.Body, w.conn.r.startBackgroundRead) + } else { + w.conn.r.startBackgroundRead() + } + + // HTTP cannot have multiple simultaneous active requests.[*] + // Until the server replies to this request, it can't read another, + // so we might as well run the handler in this goroutine. + // [*] Not strictly true: HTTP pipelining. We could let them all process + // in parallel even if their responses need to be serialized. + // But we're not going to implement HTTP pipelining because it + // was never deployed in the wild and the answer is HTTP/2. + inFlightResponse = w + serverHandler{c.server}.ServeHTTP(w, w.req) + inFlightResponse = nil + w.cancelCtx() + if c.hijacked() { + c.r.releaseConn() + return + } + w.finishRequest() + c.rwc.SetWriteDeadline(time.Time{}) + if !w.shouldReuseConnection() { + if w.requestBodyLimitHit || w.closedRequestBodyEarly() { + c.closeWriteAndWait() + } + return + } + c.setState(c.rwc, StateIdle, runHooks) + c.curReq.Store(nil) + + if !w.conn.server.doKeepAlives() { + // We're in shutdown mode. We might've replied + // to the user without "Connection: close" and + // they might think they can send another + // request, but such is life with HTTP/1.1. + return + } + + if d := c.server.idleTimeout(); d > 0 { + c.rwc.SetReadDeadline(time.Now().Add(d)) + } else { + c.rwc.SetReadDeadline(time.Time{}) + } + + // Wait for the connection to become readable again before trying to + // read the next request. This prevents a ReadHeaderTimeout or + // ReadTimeout from starting until the first bytes of the next request + // have been received. + if _, err := c.bufr.Peek(4); err != nil { + return + } + + c.rwc.SetReadDeadline(time.Time{}) + } +} + +// unencryptedHTTP2Request is an HTTP handler that initializes +// certain uninitialized fields in its *Request. +// +// It's the unencrypted version of initALPNRequest. +type unencryptedHTTP2Request struct { + ctx context.Context + c net.Conn + h serverHandler +} + +func (h unencryptedHTTP2Request) BaseContext() context.Context { return h.ctx } + +func (h unencryptedHTTP2Request) ServeHTTP(rw ResponseWriter, req *Request) { + if req.Body == nil { + req.Body = NoBody + } + if req.RemoteAddr == "" { + req.RemoteAddr = h.c.RemoteAddr().String() + } + h.h.ServeHTTP(rw, req) +} + +// unencryptedNetConnInTLSConn is used to pass an unencrypted net.Conn to +// functions that only accept a *tls.Conn. +type unencryptedNetConnInTLSConn struct { + net.Conn // panic on all net.Conn methods + conn net.Conn +} + +func (c unencryptedNetConnInTLSConn) UnencryptedNetConn() net.Conn { + return c.conn +} + +func unencryptedTLSConn(c net.Conn) *tls.Conn { + return tls.Client(unencryptedNetConnInTLSConn{conn: c}, nil) +} + +// TLSNextProto key to use for unencrypted HTTP/2 connections. +// Not actually a TLS-negotiated protocol. +const nextProtoUnencryptedHTTP2 = "unencrypted_http2" + +func (c *conn) maybeServeUnencryptedHTTP2(ctx context.Context) bool { + fn, ok := c.server.TLSNextProto[nextProtoUnencryptedHTTP2] + if !ok { + return false + } + hasPreface := func(c *conn, preface []byte) bool { + c.r.setReadLimit(int64(len(preface)) - int64(c.bufr.Buffered())) + got, err := c.bufr.Peek(len(preface)) + c.r.setInfiniteReadLimit() + return err == nil && bytes.Equal(got, preface) + } + if !hasPreface(c, []byte("PRI * HTTP/2.0")) { + return false + } + if !hasPreface(c, []byte("PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n")) { + return false + } + c.setState(c.rwc, StateActive, skipHooks) + h := unencryptedHTTP2Request{ctx, c.rwc, serverHandler{c.server}} + fn(c.server, unencryptedTLSConn(c.rwc), h) + return true +} + +func (w *response) sendExpectationFailed() { + // TODO(bradfitz): let ServeHTTP handlers handle + // requests with non-standard expectation[s]? Seems + // theoretical at best, and doesn't fit into the + // current ServeHTTP model anyway. We'd need to + // make the ResponseWriter an optional + // "ExpectReplier" interface or something. + // + // For now we'll just obey RFC 7231 5.1.1 which says + // "A server that receives an Expect field-value other + // than 100-continue MAY respond with a 417 (Expectation + // Failed) status code to indicate that the unexpected + // expectation cannot be met." + w.Header().Set("Connection", "close") + w.WriteHeader(StatusExpectationFailed) + w.finishRequest() +} + +// Hijack implements the [Hijacker.Hijack] method. Our response is both a [ResponseWriter] +// and a [Hijacker]. +func (w *response) Hijack() (rwc net.Conn, buf *bufio.ReadWriter, err error) { + if w.handlerDone.Load() { + panic("net/http: Hijack called after ServeHTTP finished") + } + w.disableWriteContinue() + if w.wroteHeader { + w.cw.flush() + } + + c := w.conn + c.mu.Lock() + defer c.mu.Unlock() + + // Release the bufioWriter that writes to the chunk writer, it is not + // used after a connection has been hijacked. + rwc, buf, err = c.hijackLocked() + if err == nil { + putBufioWriter(w.w) + w.w = nil + } + return rwc, buf, err +} + +func (w *response) CloseNotify() <-chan bool { + w.lazyCloseNotifyMu.Lock() + defer w.lazyCloseNotifyMu.Unlock() + if w.handlerDone.Load() { + panic("net/http: CloseNotify called after ServeHTTP finished") + } + if w.closeNotifyCh == nil { + w.closeNotifyCh = make(chan bool, 1) + if w.closeNotifyTriggered { + w.closeNotifyCh <- true // action prior closeNotify call + } + } + return w.closeNotifyCh +} + +func (w *response) closeNotify() { + w.lazyCloseNotifyMu.Lock() + defer w.lazyCloseNotifyMu.Unlock() + if w.closeNotifyTriggered { + return // already triggered + } + w.closeNotifyTriggered = true + if w.closeNotifyCh != nil { + w.closeNotifyCh <- true + } +} + +func registerOnHitEOF(rc io.ReadCloser, fn func()) { + switch v := rc.(type) { + case *expectContinueReader: + registerOnHitEOF(v.readCloser, fn) + case *body: + v.registerOnHitEOF(fn) + default: + panic("unexpected type " + fmt.Sprintf("%T", rc)) + } +} + +// requestBodyRemains reports whether future calls to Read +// on rc might yield more data. +func requestBodyRemains(rc io.ReadCloser) bool { + if rc == NoBody { + return false + } + switch v := rc.(type) { + case *expectContinueReader: + return requestBodyRemains(v.readCloser) + case *body: + return v.bodyRemains() + default: + panic("unexpected type " + fmt.Sprintf("%T", rc)) + } +} + +// The HandlerFunc type is an adapter to allow the use of +// ordinary functions as HTTP handlers. If f is a function +// with the appropriate signature, HandlerFunc(f) is a +// [Handler] that calls f. +type HandlerFunc func(ResponseWriter, *Request) + +// ServeHTTP calls f(w, r). +func (f HandlerFunc) ServeHTTP(w ResponseWriter, r *Request) { + f(w, r) +} + +// Helper handlers + +// Error replies to the request with the specified error message and HTTP code. +// It does not otherwise end the request; the caller should ensure no further +// writes are done to w. +// The error message should be plain text. +// +// Error deletes the Content-Length header, +// sets Content-Type to “text/plain; charset=utf-8”, +// and sets X-Content-Type-Options to “nosniff”. +// This configures the header properly for the error message, +// in case the caller had set it up expecting a successful output. +func Error(w ResponseWriter, error string, code int) { + h := w.Header() + + // Delete the Content-Length header, which might be for some other content. + // Assuming the error string fits in the writer's buffer, we'll figure + // out the correct Content-Length for it later. + // + // We don't delete Content-Encoding, because some middleware sets + // Content-Encoding: gzip and wraps the ResponseWriter to compress on-the-fly. + // See https://go.dev/issue/66343. + h.Del("Content-Length") + + // There might be content type already set, but we reset it to + // text/plain for the error message. + h.Set("Content-Type", "text/plain; charset=utf-8") + h.Set("X-Content-Type-Options", "nosniff") + w.WriteHeader(code) + fmt.Fprintln(w, error) +} + +// NotFound replies to the request with an HTTP 404 not found error. +func NotFound(w ResponseWriter, r *Request) { Error(w, "404 page not found", StatusNotFound) } + +// NotFoundHandler returns a simple request handler +// that replies to each request with a “404 page not found” reply. +func NotFoundHandler() Handler { return HandlerFunc(NotFound) } + +// StripPrefix returns a handler that serves HTTP requests by removing the +// given prefix from the request URL's Path (and RawPath if set) and invoking +// the handler h. StripPrefix handles a request for a path that doesn't begin +// with prefix by replying with an HTTP 404 not found error. The prefix must +// match exactly: if the prefix in the request contains escaped characters +// the reply is also an HTTP 404 not found error. +func StripPrefix(prefix string, h Handler) Handler { + if prefix == "" { + return h + } + return HandlerFunc(func(w ResponseWriter, r *Request) { + p := strings.TrimPrefix(r.URL.Path, prefix) + rp := strings.TrimPrefix(r.URL.RawPath, prefix) + if len(p) < len(r.URL.Path) && (r.URL.RawPath == "" || len(rp) < len(r.URL.RawPath)) { + r2 := new(Request) + *r2 = *r + r2.URL = new(url.URL) + *r2.URL = *r.URL + r2.URL.Path = p + r2.URL.RawPath = rp + h.ServeHTTP(w, r2) + } else { + NotFound(w, r) + } + }) +} + +// Redirect replies to the request with a redirect to url, +// which may be a path relative to the request path. +// Any non-ASCII characters in url will be percent-encoded, +// but existing percent encodings will not be changed. +// +// The provided code should be in the 3xx range and is usually +// [StatusMovedPermanently], [StatusFound] or [StatusSeeOther]. +// +// If the Content-Type header has not been set, [Redirect] sets it +// to "text/html; charset=utf-8" and writes a small HTML body. +// Setting the Content-Type header to any value, including nil, +// disables that behavior. +func Redirect(w ResponseWriter, r *Request, url string, code int) { + if u, err := urlpkg.Parse(url); err == nil { + // If url was relative, make its path absolute by + // combining with request path. + // The client would probably do this for us, + // but doing it ourselves is more reliable. + // See RFC 7231, section 7.1.2 + if u.Scheme == "" && u.Host == "" { + oldpath := r.URL.Path + if oldpath == "" { // should not happen, but avoid a crash if it does + oldpath = "/" + } + + // no leading http://server + if url == "" || url[0] != '/' { + // make relative path absolute + olddir, _ := path.Split(oldpath) + url = olddir + url + } + + var query string + if i := strings.Index(url, "?"); i != -1 { + url, query = url[:i], url[i:] + } + + // clean up but preserve trailing slash + trailing := strings.HasSuffix(url, "/") + url = path.Clean(url) + if trailing && !strings.HasSuffix(url, "/") { + url += "/" + } + url += query + } + } + + h := w.Header() + + // RFC 7231 notes that a short HTML body is usually included in + // the response because older user agents may not understand 301/307. + // Do it only if the request didn't already have a Content-Type header. + _, hadCT := h["Content-Type"] + + h.Set("Location", hexEscapeNonASCII(url)) + if !hadCT && (r.Method == "GET" || r.Method == "HEAD") { + h.Set("Content-Type", "text/html; charset=utf-8") + } + w.WriteHeader(code) + + // Shouldn't send the body for POST or HEAD; that leaves GET. + if !hadCT && r.Method == "GET" { + body := "" + StatusText(code) + ".\n" + fmt.Fprintln(w, body) + } +} + +var htmlReplacer = strings.NewReplacer( + "&", "&", + "<", "<", + ">", ">", + // """ is shorter than """. + `"`, """, + // "'" is shorter than "'" and apos was not in HTML until HTML5. + "'", "'", +) + +func htmlEscape(s string) string { + return htmlReplacer.Replace(s) +} + +// Redirect to a fixed URL +type redirectHandler struct { + url string + code int +} + +func (rh *redirectHandler) ServeHTTP(w ResponseWriter, r *Request) { + Redirect(w, r, rh.url, rh.code) +} + +// RedirectHandler returns a request handler that redirects +// each request it receives to the given url using the given +// status code. +// +// The provided code should be in the 3xx range and is usually +// [StatusMovedPermanently], [StatusFound] or [StatusSeeOther]. +func RedirectHandler(url string, code int) Handler { + return &redirectHandler{url, code} +} + +// ServeMux is an HTTP request multiplexer. +// It matches the URL of each incoming request against a list of registered +// patterns and calls the handler for the pattern that +// most closely matches the URL. +// +// # Patterns +// +// Patterns can match the method, host and path of a request. +// Some examples: +// +// - "/index.html" matches the path "/index.html" for any host and method. +// - "GET /static/" matches a GET request whose path begins with "/static/". +// - "example.com/" matches any request to the host "example.com". +// - "example.com/{$}" matches requests with host "example.com" and path "/". +// - "/b/{bucket}/o/{objectname...}" matches paths whose first segment is "b" +// and whose third segment is "o". The name "bucket" denotes the second +// segment and "objectname" denotes the remainder of the path. +// +// In general, a pattern looks like +// +// [METHOD ][HOST]/[PATH] +// +// All three parts are optional; "/" is a valid pattern. +// If METHOD is present, it must be followed by at least one space or tab. +// +// Literal (that is, non-wildcard) parts of a pattern match +// the corresponding parts of a request case-sensitively. +// +// A pattern with no method matches every method. A pattern +// with the method GET matches both GET and HEAD requests. +// Otherwise, the method must match exactly. +// +// A pattern with no host matches every host. +// A pattern with a host matches URLs on that host only. +// +// A path can include wildcard segments of the form {NAME} or {NAME...}. +// For example, "/b/{bucket}/o/{objectname...}". +// The wildcard name must be a valid Go identifier. +// Wildcards must be full path segments: they must be preceded by a slash and followed by +// either a slash or the end of the string. +// For example, "/b_{bucket}" is not a valid pattern. +// +// Normally a wildcard matches only a single path segment, +// ending at the next literal slash (not %2F) in the request URL. +// But if the "..." is present, then the wildcard matches the remainder of the URL path, including slashes. +// (Therefore it is invalid for a "..." wildcard to appear anywhere but at the end of a pattern.) +// The match for a wildcard can be obtained by calling [Request.PathValue] with the wildcard's name. +// A trailing slash in a path acts as an anonymous "..." wildcard. +// +// The special wildcard {$} matches only the end of the URL. +// For example, the pattern "/{$}" matches only the path "/", +// whereas the pattern "/" matches every path. +// +// For matching, both pattern paths and incoming request paths are unescaped segment by segment. +// So, for example, the path "/a%2Fb/100%25" is treated as having two segments, "a/b" and "100%". +// The pattern "/a%2fb/" matches it, but the pattern "/a/b/" does not. +// +// # Precedence +// +// If two or more patterns match a request, then the most specific pattern takes precedence. +// A pattern P1 is more specific than P2 if P1 matches a strict subset of P2’s requests; +// that is, if P2 matches all the requests of P1 and more. +// If neither is more specific, then the patterns conflict. +// There is one exception to this rule, for backwards compatibility: +// if two patterns would otherwise conflict and one has a host while the other does not, +// then the pattern with the host takes precedence. +// If a pattern passed to [ServeMux.Handle] or [ServeMux.HandleFunc] conflicts with +// another pattern that is already registered, those functions panic. +// +// As an example of the general rule, "/images/thumbnails/" is more specific than "/images/", +// so both can be registered. +// The former matches paths beginning with "/images/thumbnails/" +// and the latter will match any other path in the "/images/" subtree. +// +// As another example, consider the patterns "GET /" and "/index.html": +// both match a GET request for "/index.html", but the former pattern +// matches all other GET and HEAD requests, while the latter matches any +// request for "/index.html" that uses a different method. +// The patterns conflict. +// +// # Trailing-slash redirection +// +// Consider a [ServeMux] with a handler for a subtree, registered using a trailing slash or "..." wildcard. +// If the ServeMux receives a request for the subtree root without a trailing slash, +// it redirects the request by adding the trailing slash. +// This behavior can be overridden with a separate registration for the path without +// the trailing slash or "..." wildcard. For example, registering "/images/" causes ServeMux +// to redirect a request for "/images" to "/images/", unless "/images" has +// been registered separately. +// +// # Request sanitizing +// +// ServeMux also takes care of sanitizing the URL request path and the Host +// header, stripping the port number and redirecting any request containing . or +// .. segments or repeated slashes to an equivalent, cleaner URL. +// Escaped path elements such as "%2e" for "." and "%2f" for "/" are preserved +// and aren't considered separators for request routing. +// +// # Compatibility +// +// The pattern syntax and matching behavior of ServeMux changed significantly +// in Go 1.22. To restore the old behavior, set the GODEBUG environment variable +// to "httpmuxgo121=1". This setting is read once, at program startup; changes +// during execution will be ignored. +// +// The backwards-incompatible changes include: +// - Wildcards are just ordinary literal path segments in 1.21. +// For example, the pattern "/{x}" will match only that path in 1.21, +// but will match any one-segment path in 1.22. +// - In 1.21, no pattern was rejected, unless it was empty or conflicted with an existing pattern. +// In 1.22, syntactically invalid patterns will cause [ServeMux.Handle] and [ServeMux.HandleFunc] to panic. +// For example, in 1.21, the patterns "/{" and "/a{x}" match themselves, +// but in 1.22 they are invalid and will cause a panic when registered. +// - In 1.22, each segment of a pattern is unescaped; this was not done in 1.21. +// For example, in 1.22 the pattern "/%61" matches the path "/a" ("%61" being the URL escape sequence for "a"), +// but in 1.21 it would match only the path "/%2561" (where "%25" is the escape for the percent sign). +// - When matching patterns to paths, in 1.22 each segment of the path is unescaped; in 1.21, the entire path is unescaped. +// This change mostly affects how paths with %2F escapes adjacent to slashes are treated. +// See https://go.dev/issue/21955 for details. +type ServeMux struct { + mu sync.RWMutex + tree routingNode + index routingIndex + mux121 serveMux121 // used only when GODEBUG=httpmuxgo121=1 +} + +// NewServeMux allocates and returns a new [ServeMux]. +func NewServeMux() *ServeMux { + return &ServeMux{} +} + +// DefaultServeMux is the default [ServeMux] used by [Serve]. +var DefaultServeMux = &defaultServeMux + +var defaultServeMux ServeMux + +// cleanPath returns the canonical path for p, eliminating . and .. elements. +func cleanPath(p string) string { + if p == "" { + return "/" + } + if p[0] != '/' { + p = "/" + p + } + np := path.Clean(p) + // path.Clean removes trailing slash except for root; + // put the trailing slash back if necessary. + if p[len(p)-1] == '/' && np != "/" { + // Fast path for common case of p being the string we want: + if len(p) == len(np)+1 && strings.HasPrefix(p, np) { + np = p + } else { + np += "/" + } + } + return np +} + +// stripHostPort returns h without any trailing ":". +func stripHostPort(h string) string { + // If no port on host, return unchanged + if !strings.Contains(h, ":") { + return h + } + host, _, err := net.SplitHostPort(h) + if err != nil { + return h // on error, return unchanged + } + return host +} + +// Handler returns the handler to use for the given request, +// consulting r.Method, r.Host, and r.URL.Path. It always returns +// a non-nil handler. If the path is not in its canonical form, the +// handler will be an internally-generated handler that redirects +// to the canonical path. If the host contains a port, it is ignored +// when matching handlers. +// +// The path and host are used unchanged for CONNECT requests. +// +// Handler also returns the registered pattern that matches the +// request or, in the case of internally-generated redirects, +// the path that will match after following the redirect. +// +// If there is no registered handler that applies to the request, +// Handler returns a “page not found” or “method not supported” +// handler and an empty pattern. +// +// Handler does not modify its argument. In particular, it does not +// populate named path wildcards, so r.PathValue will always return +// the empty string. +func (mux *ServeMux) Handler(r *Request) (h Handler, pattern string) { + if use121 { + return mux.mux121.findHandler(r) + } + h, p, _, _ := mux.findHandler(r) + return h, p +} + +// findHandler finds a handler for a request. +// If there is a matching handler, it returns it and the pattern that matched. +// Otherwise it returns a Redirect or NotFound handler with the path that would match +// after the redirect. +func (mux *ServeMux) findHandler(r *Request) (h Handler, patStr string, _ *pattern, matches []string) { + var n *routingNode + host := r.URL.Host + escapedPath := r.URL.EscapedPath() + path := escapedPath + // CONNECT requests are not canonicalized. + if r.Method == "CONNECT" { + // If r.URL.Path is /tree and its handler is not registered, + // the /tree -> /tree/ redirect applies to CONNECT requests + // but the path canonicalization does not. + _, _, u := mux.matchOrRedirect(host, r.Method, path, r.URL) + if u != nil { + return RedirectHandler(u.String(), StatusMovedPermanently), u.Path, nil, nil + } + // Redo the match, this time with r.Host instead of r.URL.Host. + // Pass a nil URL to skip the trailing-slash redirect logic. + n, matches, _ = mux.matchOrRedirect(r.Host, r.Method, path, nil) + } else { + // All other requests have any port stripped and path cleaned + // before passing to mux.handler. + host = stripHostPort(r.Host) + path = cleanPath(path) + + // If the given path is /tree and its handler is not registered, + // redirect for /tree/. + var u *url.URL + n, matches, u = mux.matchOrRedirect(host, r.Method, path, r.URL) + if u != nil { + return RedirectHandler(u.String(), StatusMovedPermanently), n.pattern.String(), nil, nil + } + if path != escapedPath { + // Redirect to cleaned path. + patStr := "" + if n != nil { + patStr = n.pattern.String() + } + u := &url.URL{Path: path, RawQuery: r.URL.RawQuery} + return RedirectHandler(u.String(), StatusMovedPermanently), patStr, nil, nil + } + } + if n == nil { + // We didn't find a match with the request method. To distinguish between + // Not Found and Method Not Allowed, see if there is another pattern that + // matches except for the method. + allowedMethods := mux.matchingMethods(host, path) + if len(allowedMethods) > 0 { + return HandlerFunc(func(w ResponseWriter, r *Request) { + w.Header().Set("Allow", strings.Join(allowedMethods, ", ")) + Error(w, StatusText(StatusMethodNotAllowed), StatusMethodNotAllowed) + }), "", nil, nil + } + return NotFoundHandler(), "", nil, nil + } + return n.handler, n.pattern.String(), n.pattern, matches +} + +// matchOrRedirect looks up a node in the tree that matches the host, method and path. +// +// If the url argument is non-nil, handler also deals with trailing-slash +// redirection: when a path doesn't match exactly, the match is tried again +// after appending "/" to the path. If that second match succeeds, the last +// return value is the URL to redirect to. +func (mux *ServeMux) matchOrRedirect(host, method, path string, u *url.URL) (_ *routingNode, matches []string, redirectTo *url.URL) { + mux.mu.RLock() + defer mux.mu.RUnlock() + + n, matches := mux.tree.match(host, method, path) + // If we have an exact match, or we were asked not to try trailing-slash redirection, + // or the URL already has a trailing slash, then we're done. + if !exactMatch(n, path) && u != nil && !strings.HasSuffix(path, "/") { + // If there is an exact match with a trailing slash, then redirect. + path += "/" + n2, _ := mux.tree.match(host, method, path) + if exactMatch(n2, path) { + // It is safe to return n2 here: it is used only in the second RedirectHandler case + // of findHandler, and that method returns before it does the "n == nil" check where + // the first return value matters. We return it here only to make the pattern available + // to findHandler. + return n2, nil, &url.URL{Path: cleanPath(u.Path) + "/", RawQuery: u.RawQuery} + } + } + return n, matches, nil +} + +// exactMatch reports whether the node's pattern exactly matches the path. +// As a special case, if the node is nil, exactMatch return false. +// +// Before wildcards were introduced, it was clear that an exact match meant +// that the pattern and path were the same string. The only other possibility +// was that a trailing-slash pattern, like "/", matched a path longer than +// it, like "/a". +// +// With wildcards, we define an inexact match as any one where a multi wildcard +// matches a non-empty string. All other matches are exact. +// For example, these are all exact matches: +// +// pattern path +// /a /a +// /{x} /a +// /a/{$} /a/ +// /a/ /a/ +// +// The last case has a multi wildcard (implicitly), but the match is exact because +// the wildcard matches the empty string. +// +// Examples of matches that are not exact: +// +// pattern path +// / /a +// /a/{x...} /a/b +func exactMatch(n *routingNode, path string) bool { + if n == nil { + return false + } + // We can't directly implement the definition (empty match for multi + // wildcard) because we don't record a match for anonymous multis. + + // If there is no multi, the match is exact. + if !n.pattern.lastSegment().multi { + return true + } + + // If the path doesn't end in a trailing slash, then the multi match + // is non-empty. + if len(path) > 0 && path[len(path)-1] != '/' { + return false + } + // Only patterns ending in {$} or a multi wildcard can + // match a path with a trailing slash. + // For the match to be exact, the number of pattern + // segments should be the same as the number of slashes in the path. + // E.g. "/a/b/{$}" and "/a/b/{...}" exactly match "/a/b/", but "/a/" does not. + return len(n.pattern.segments) == strings.Count(path, "/") +} + +// matchingMethods return a sorted list of all methods that would match with the given host and path. +func (mux *ServeMux) matchingMethods(host, path string) []string { + // Hold the read lock for the entire method so that the two matches are done + // on the same set of registered patterns. + mux.mu.RLock() + defer mux.mu.RUnlock() + ms := map[string]bool{} + mux.tree.matchingMethods(host, path, ms) + // matchOrRedirect will try appending a trailing slash if there is no match. + if !strings.HasSuffix(path, "/") { + mux.tree.matchingMethods(host, path+"/", ms) + } + return slices.Sorted(maps.Keys(ms)) +} + +// ServeHTTP dispatches the request to the handler whose +// pattern most closely matches the request URL. +func (mux *ServeMux) ServeHTTP(w ResponseWriter, r *Request) { + if r.RequestURI == "*" { + if r.ProtoAtLeast(1, 1) { + w.Header().Set("Connection", "close") + } + w.WriteHeader(StatusBadRequest) + return + } + var h Handler + if use121 { + h, _ = mux.mux121.findHandler(r) + } else { + h, r.Pattern, r.pat, r.matches = mux.findHandler(r) + } + h.ServeHTTP(w, r) +} + +// The four functions below all call ServeMux.register so that callerLocation +// always refers to user code. + +// Handle registers the handler for the given pattern. +// If the given pattern conflicts with one that is already registered, Handle +// panics. +func (mux *ServeMux) Handle(pattern string, handler Handler) { + if use121 { + mux.mux121.handle(pattern, handler) + } else { + mux.register(pattern, handler) + } +} + +// HandleFunc registers the handler function for the given pattern. +// If the given pattern conflicts with one that is already registered, HandleFunc +// panics. +func (mux *ServeMux) HandleFunc(pattern string, handler func(ResponseWriter, *Request)) { + if use121 { + mux.mux121.handleFunc(pattern, handler) + } else { + mux.register(pattern, HandlerFunc(handler)) + } +} + +// Handle registers the handler for the given pattern in [DefaultServeMux]. +// The documentation for [ServeMux] explains how patterns are matched. +func Handle(pattern string, handler Handler) { + if use121 { + DefaultServeMux.mux121.handle(pattern, handler) + } else { + DefaultServeMux.register(pattern, handler) + } +} + +// HandleFunc registers the handler function for the given pattern in [DefaultServeMux]. +// The documentation for [ServeMux] explains how patterns are matched. +func HandleFunc(pattern string, handler func(ResponseWriter, *Request)) { + if use121 { + DefaultServeMux.mux121.handleFunc(pattern, handler) + } else { + DefaultServeMux.register(pattern, HandlerFunc(handler)) + } +} + +func (mux *ServeMux) register(pattern string, handler Handler) { + if err := mux.registerErr(pattern, handler); err != nil { + panic(err) + } +} + +func (mux *ServeMux) registerErr(patstr string, handler Handler) error { + if patstr == "" { + return errors.New("http: invalid pattern") + } + if handler == nil { + return errors.New("http: nil handler") + } + if f, ok := handler.(HandlerFunc); ok && f == nil { + return errors.New("http: nil handler") + } + + pat, err := parsePattern(patstr) + if err != nil { + return fmt.Errorf("parsing %q: %w", patstr, err) + } + + // Get the caller's location, for better conflict error messages. + // Skip register and whatever calls it. + _, file, line, ok := runtime.Caller(3) + if !ok { + pat.loc = "unknown location" + } else { + pat.loc = fmt.Sprintf("%s:%d", file, line) + } + + mux.mu.Lock() + defer mux.mu.Unlock() + // Check for conflict. + if err := mux.index.possiblyConflictingPatterns(pat, func(pat2 *pattern) error { + if pat.conflictsWith(pat2) { + d := describeConflict(pat, pat2) + return fmt.Errorf("pattern %q (registered at %s) conflicts with pattern %q (registered at %s):\n%s", + pat, pat.loc, pat2, pat2.loc, d) + } + return nil + }); err != nil { + return err + } + mux.tree.addPattern(pat, handler) + mux.index.addPattern(pat) + return nil +} + +// Serve accepts incoming HTTP connections on the listener l, +// creating a new service goroutine for each. The service goroutines +// read requests and then call handler to reply to them. +// +// The handler is typically nil, in which case [DefaultServeMux] is used. +// +// HTTP/2 support is only enabled if the Listener returns [*tls.Conn] +// connections and they were configured with "h2" in the TLS +// Config.NextProtos. +// +// Serve always returns a non-nil error. +func Serve(l net.Listener, handler Handler) error { + srv := &Server{Handler: handler} + return srv.Serve(l) +} + +// ServeTLS accepts incoming HTTPS connections on the listener l, +// creating a new service goroutine for each. The service goroutines +// read requests and then call handler to reply to them. +// +// The handler is typically nil, in which case [DefaultServeMux] is used. +// +// Additionally, files containing a certificate and matching private key +// for the server must be provided. If the certificate is signed by a +// certificate authority, the certFile should be the concatenation +// of the server's certificate, any intermediates, and the CA's certificate. +// +// ServeTLS always returns a non-nil error. +func ServeTLS(l net.Listener, handler Handler, certFile, keyFile string) error { + srv := &Server{Handler: handler} + return srv.ServeTLS(l, certFile, keyFile) +} + +// A Server defines parameters for running an HTTP server. +// The zero value for Server is a valid configuration. +type Server struct { + // Addr optionally specifies the TCP address for the server to listen on, + // in the form "host:port". If empty, ":http" (port 80) is used. + // The service names are defined in RFC 6335 and assigned by IANA. + // See net.Dial for details of the address format. + Addr string + + Handler Handler // handler to invoke, http.DefaultServeMux if nil + + // DisableGeneralOptionsHandler, if true, passes "OPTIONS *" requests to the Handler, + // otherwise responds with 200 OK and Content-Length: 0. + DisableGeneralOptionsHandler bool + + // TLSConfig optionally provides a TLS configuration for use + // by ServeTLS and ListenAndServeTLS. Note that this value is + // cloned by ServeTLS and ListenAndServeTLS, so it's not + // possible to modify the configuration with methods like + // tls.Config.SetSessionTicketKeys. To use + // SetSessionTicketKeys, use Server.Serve with a TLS Listener + // instead. + TLSConfig *tls.Config + + // ReadTimeout is the maximum duration for reading the entire + // request, including the body. A zero or negative value means + // there will be no timeout. + // + // Because ReadTimeout does not let Handlers make per-request + // decisions on each request body's acceptable deadline or + // upload rate, most users will prefer to use + // ReadHeaderTimeout. It is valid to use them both. + ReadTimeout time.Duration + + // ReadHeaderTimeout is the amount of time allowed to read + // request headers. The connection's read deadline is reset + // after reading the headers and the Handler can decide what + // is considered too slow for the body. If zero, the value of + // ReadTimeout is used. If negative, or if zero and ReadTimeout + // is zero or negative, there is no timeout. + ReadHeaderTimeout time.Duration + + // WriteTimeout is the maximum duration before timing out + // writes of the response. It is reset whenever a new + // request's header is read. Like ReadTimeout, it does not + // let Handlers make decisions on a per-request basis. + // A zero or negative value means there will be no timeout. + WriteTimeout time.Duration + + // IdleTimeout is the maximum amount of time to wait for the + // next request when keep-alives are enabled. If zero, the value + // of ReadTimeout is used. If negative, or if zero and ReadTimeout + // is zero or negative, there is no timeout. + IdleTimeout time.Duration + + // MaxHeaderBytes controls the maximum number of bytes the + // server will read parsing the request header's keys and + // values, including the request line. It does not limit the + // size of the request body. + // If zero, DefaultMaxHeaderBytes is used. + MaxHeaderBytes int + + // TLSNextProto optionally specifies a function to take over + // ownership of the provided TLS connection when an ALPN + // protocol upgrade has occurred. The map key is the protocol + // name negotiated. The Handler argument should be used to + // handle HTTP requests and will initialize the Request's TLS + // and RemoteAddr if not already set. The connection is + // automatically closed when the function returns. + // If TLSNextProto is not nil, HTTP/2 support is not enabled + // automatically. + TLSNextProto map[string]func(*Server, *tls.Conn, Handler) + + // ConnState specifies an optional callback function that is + // called when a client connection changes state. See the + // ConnState type and associated constants for details. + ConnState func(net.Conn, ConnState) + + // ErrorLog specifies an optional logger for errors accepting + // connections, unexpected behavior from handlers, and + // underlying FileSystem errors. + // If nil, logging is done via the log package's standard logger. + ErrorLog *log.Logger + + // BaseContext optionally specifies a function that returns + // the base context for incoming requests on this server. + // The provided Listener is the specific Listener that's + // about to start accepting requests. + // If BaseContext is nil, the default is context.Background(). + // If non-nil, it must return a non-nil context. + BaseContext func(net.Listener) context.Context + + // ConnContext optionally specifies a function that modifies + // the context used for a new connection c. The provided ctx + // is derived from the base context and has a ServerContextKey + // value. + ConnContext func(ctx context.Context, c net.Conn) context.Context + + // HTTP2 configures HTTP/2 connections. + // + // This field does not yet have any effect. + // See https://go.dev/issue/67813. + HTTP2 *HTTP2Config + + // Protocols is the set of protocols accepted by the server. + // + // If Protocols includes UnencryptedHTTP2, the server will accept + // unencrypted HTTP/2 connections. The server can serve both + // HTTP/1 and unencrypted HTTP/2 on the same address and port. + // + // If Protocols is nil, the default is usually HTTP/1 and HTTP/2. + // If TLSNextProto is non-nil and does not contain an "h2" entry, + // the default is HTTP/1 only. + Protocols *Protocols + + inShutdown atomic.Bool // true when server is in shutdown + + disableKeepAlives atomic.Bool + nextProtoOnce sync.Once // guards setupHTTP2_* init + nextProtoErr error // result of http2.ConfigureServer if used + + mu sync.Mutex + listeners map[*net.Listener]struct{} + activeConn map[*conn]struct{} + onShutdown []func() + + listenerGroup sync.WaitGroup +} + +// Close immediately closes all active net.Listeners and any +// connections in state [StateNew], [StateActive], or [StateIdle]. For a +// graceful shutdown, use [Server.Shutdown]. +// +// Close does not attempt to close (and does not even know about) +// any hijacked connections, such as WebSockets. +// +// Close returns any error returned from closing the [Server]'s +// underlying Listener(s). +func (s *Server) Close() error { + s.inShutdown.Store(true) + s.mu.Lock() + defer s.mu.Unlock() + err := s.closeListenersLocked() + + // Unlock s.mu while waiting for listenerGroup. + // The group Add and Done calls are made with s.mu held, + // to avoid adding a new listener in the window between + // us setting inShutdown above and waiting here. + s.mu.Unlock() + s.listenerGroup.Wait() + s.mu.Lock() + + for c := range s.activeConn { + c.rwc.Close() + delete(s.activeConn, c) + } + return err +} + +// shutdownPollIntervalMax is the max polling interval when checking +// quiescence during Server.Shutdown. Polling starts with a small +// interval and backs off to the max. +// Ideally we could find a solution that doesn't involve polling, +// but which also doesn't have a high runtime cost (and doesn't +// involve any contentious mutexes), but that is left as an +// exercise for the reader. +const shutdownPollIntervalMax = 500 * time.Millisecond + +// Shutdown gracefully shuts down the server without interrupting any +// active connections. Shutdown works by first closing all open +// listeners, then closing all idle connections, and then waiting +// indefinitely for connections to return to idle and then shut down. +// If the provided context expires before the shutdown is complete, +// Shutdown returns the context's error, otherwise it returns any +// error returned from closing the [Server]'s underlying Listener(s). +// +// When Shutdown is called, [Serve], [ServeTLS], [ListenAndServe], and +// [ListenAndServeTLS] immediately return [ErrServerClosed]. Make sure the +// program doesn't exit and waits instead for Shutdown to return. +// +// Shutdown does not attempt to close nor wait for hijacked +// connections such as WebSockets. The caller of Shutdown should +// separately notify such long-lived connections of shutdown and wait +// for them to close, if desired. See [Server.RegisterOnShutdown] for a way to +// register shutdown notification functions. +// +// Once Shutdown has been called on a server, it may not be reused; +// future calls to methods such as Serve will return ErrServerClosed. +func (s *Server) Shutdown(ctx context.Context) error { + s.inShutdown.Store(true) + + s.mu.Lock() + lnerr := s.closeListenersLocked() + for _, f := range s.onShutdown { + go f() + } + s.mu.Unlock() + s.listenerGroup.Wait() + + pollIntervalBase := time.Millisecond + nextPollInterval := func() time.Duration { + // Add 10% jitter. + interval := pollIntervalBase + time.Duration(rand.Intn(int(pollIntervalBase/10))) + // Double and clamp for next time. + pollIntervalBase *= 2 + if pollIntervalBase > shutdownPollIntervalMax { + pollIntervalBase = shutdownPollIntervalMax + } + return interval + } + + timer := time.NewTimer(nextPollInterval()) + defer timer.Stop() + for { + if s.closeIdleConns() { + return lnerr + } + select { + case <-ctx.Done(): + return ctx.Err() + case <-timer.C: + timer.Reset(nextPollInterval()) + } + } +} + +// RegisterOnShutdown registers a function to call on [Server.Shutdown]. +// This can be used to gracefully shutdown connections that have +// undergone ALPN protocol upgrade or that have been hijacked. +// This function should start protocol-specific graceful shutdown, +// but should not wait for shutdown to complete. +func (s *Server) RegisterOnShutdown(f func()) { + s.mu.Lock() + s.onShutdown = append(s.onShutdown, f) + s.mu.Unlock() +} + +// closeIdleConns closes all idle connections and reports whether the +// server is quiescent. +func (s *Server) closeIdleConns() bool { + s.mu.Lock() + defer s.mu.Unlock() + quiescent := true + for c := range s.activeConn { + st, unixSec := c.getState() + // Issue 22682: treat StateNew connections as if + // they're idle if we haven't read the first request's + // header in over 5 seconds. + if st == StateNew && unixSec < time.Now().Unix()-5 { + st = StateIdle + } + if st != StateIdle || unixSec == 0 { + // Assume unixSec == 0 means it's a very new + // connection, without state set yet. + quiescent = false + continue + } + c.rwc.Close() + delete(s.activeConn, c) + } + return quiescent +} + +func (s *Server) closeListenersLocked() error { + var err error + for ln := range s.listeners { + if cerr := (*ln).Close(); cerr != nil && err == nil { + err = cerr + } + } + return err +} + +// A ConnState represents the state of a client connection to a server. +// It's used by the optional [Server.ConnState] hook. +type ConnState int + +const ( + // StateNew represents a new connection that is expected to + // send a request immediately. Connections begin at this + // state and then transition to either StateActive or + // StateClosed. + StateNew ConnState = iota + + // StateActive represents a connection that has read 1 or more + // bytes of a request. The Server.ConnState hook for + // StateActive fires before the request has entered a handler + // and doesn't fire again until the request has been + // handled. After the request is handled, the state + // transitions to StateClosed, StateHijacked, or StateIdle. + // For HTTP/2, StateActive fires on the transition from zero + // to one active request, and only transitions away once all + // active requests are complete. That means that ConnState + // cannot be used to do per-request work; ConnState only notes + // the overall state of the connection. + StateActive + + // StateIdle represents a connection that has finished + // handling a request and is in the keep-alive state, waiting + // for a new request. Connections transition from StateIdle + // to either StateActive or StateClosed. + StateIdle + + // StateHijacked represents a hijacked connection. + // This is a terminal state. It does not transition to StateClosed. + StateHijacked + + // StateClosed represents a closed connection. + // This is a terminal state. Hijacked connections do not + // transition to StateClosed. + StateClosed +) + +var stateName = map[ConnState]string{ + StateNew: "new", + StateActive: "active", + StateIdle: "idle", + StateHijacked: "hijacked", + StateClosed: "closed", +} + +func (c ConnState) String() string { + return stateName[c] +} + +// serverHandler delegates to either the server's Handler or +// DefaultServeMux and also handles "OPTIONS *" requests. +type serverHandler struct { + srv *Server +} + +// ServeHTTP should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/erda-project/erda-infra +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname badServeHTTP net/http.serverHandler.ServeHTTP +func (sh serverHandler) ServeHTTP(rw ResponseWriter, req *Request) { + handler := sh.srv.Handler + if handler == nil { + handler = DefaultServeMux + } + if !sh.srv.DisableGeneralOptionsHandler && req.RequestURI == "*" && req.Method == "OPTIONS" { + handler = globalOptionsHandler{} + } + + handler.ServeHTTP(rw, req) +} + +func badServeHTTP(serverHandler, ResponseWriter, *Request) + +// AllowQuerySemicolons returns a handler that serves requests by converting any +// unescaped semicolons in the URL query to ampersands, and invoking the handler h. +// +// This restores the pre-Go 1.17 behavior of splitting query parameters on both +// semicolons and ampersands. (See golang.org/issue/25192). Note that this +// behavior doesn't match that of many proxies, and the mismatch can lead to +// security issues. +// +// AllowQuerySemicolons should be invoked before [Request.ParseForm] is called. +func AllowQuerySemicolons(h Handler) Handler { + return HandlerFunc(func(w ResponseWriter, r *Request) { + if strings.Contains(r.URL.RawQuery, ";") { + r2 := new(Request) + *r2 = *r + r2.URL = new(url.URL) + *r2.URL = *r.URL + r2.URL.RawQuery = strings.ReplaceAll(r.URL.RawQuery, ";", "&") + h.ServeHTTP(w, r2) + } else { + h.ServeHTTP(w, r) + } + }) +} + +// ListenAndServe listens on the TCP network address s.Addr and then +// calls [Serve] to handle requests on incoming connections. +// Accepted connections are configured to enable TCP keep-alives. +// +// If s.Addr is blank, ":http" is used. +// +// ListenAndServe always returns a non-nil error. After [Server.Shutdown] or [Server.Close], +// the returned error is [ErrServerClosed]. +func (s *Server) ListenAndServe() error { + if s.shuttingDown() { + return ErrServerClosed + } + addr := s.Addr + if addr == "" { + addr = ":http" + } + ln, err := net.Listen("tcp", addr) + if err != nil { + return err + } + return s.Serve(ln) +} + +var testHookServerServe func(*Server, net.Listener) // used if non-nil + +// shouldConfigureHTTP2ForServe reports whether Server.Serve should configure +// automatic HTTP/2. (which sets up the s.TLSNextProto map) +func (s *Server) shouldConfigureHTTP2ForServe() bool { + if s.TLSConfig == nil { + // Compatibility with Go 1.6: + // If there's no TLSConfig, it's possible that the user just + // didn't set it on the http.Server, but did pass it to + // tls.NewListener and passed that listener to Serve. + // So we should configure HTTP/2 (to set up s.TLSNextProto) + // in case the listener returns an "h2" *tls.Conn. + return true + } + if s.protocols().UnencryptedHTTP2() { + return true + } + // The user specified a TLSConfig on their http.Server. + // In this, case, only configure HTTP/2 if their tls.Config + // explicitly mentions "h2". Otherwise http2.ConfigureServer + // would modify the tls.Config to add it, but they probably already + // passed this tls.Config to tls.NewListener. And if they did, + // it's too late anyway to fix it. It would only be potentially racy. + // See Issue 15908. + return slices.Contains(s.TLSConfig.NextProtos, http2NextProtoTLS) +} + +// ErrServerClosed is returned by the [Server.Serve], [ServeTLS], [ListenAndServe], +// and [ListenAndServeTLS] methods after a call to [Server.Shutdown] or [Server.Close]. +var ErrServerClosed = errors.New("http: Server closed") + +// Serve accepts incoming connections on the Listener l, creating a +// new service goroutine for each. The service goroutines read requests and +// then call s.Handler to reply to them. +// +// HTTP/2 support is only enabled if the Listener returns [*tls.Conn] +// connections and they were configured with "h2" in the TLS +// Config.NextProtos. +// +// Serve always returns a non-nil error and closes l. +// After [Server.Shutdown] or [Server.Close], the returned error is [ErrServerClosed]. +func (s *Server) Serve(l net.Listener) error { + if fn := testHookServerServe; fn != nil { + fn(s, l) // call hook with unwrapped listener + } + + origListener := l + l = &onceCloseListener{Listener: l} + defer l.Close() + + if err := s.setupHTTP2_Serve(); err != nil { + return err + } + + if !s.trackListener(&l, true) { + return ErrServerClosed + } + defer s.trackListener(&l, false) + + baseCtx := context.Background() + if s.BaseContext != nil { + baseCtx = s.BaseContext(origListener) + if baseCtx == nil { + panic("BaseContext returned a nil context") + } + } + + var tempDelay time.Duration // how long to sleep on accept failure + + ctx := context.WithValue(baseCtx, ServerContextKey, s) + for { + rw, err := l.Accept() + if err != nil { + if s.shuttingDown() { + return ErrServerClosed + } + if ne, ok := err.(net.Error); ok && ne.Temporary() { + if tempDelay == 0 { + tempDelay = 5 * time.Millisecond + } else { + tempDelay *= 2 + } + if max := 1 * time.Second; tempDelay > max { + tempDelay = max + } + s.logf("http: Accept error: %v; retrying in %v", err, tempDelay) + time.Sleep(tempDelay) + continue + } + return err + } + connCtx := ctx + if cc := s.ConnContext; cc != nil { + connCtx = cc(connCtx, rw) + if connCtx == nil { + panic("ConnContext returned nil") + } + } + tempDelay = 0 + c := s.newConn(rw) + c.setState(c.rwc, StateNew, runHooks) // before Serve can return + go c.serve(connCtx) + } +} + +// ServeTLS accepts incoming connections on the Listener l, creating a +// new service goroutine for each. The service goroutines perform TLS +// setup and then read requests, calling s.Handler to reply to them. +// +// Files containing a certificate and matching private key for the +// server must be provided if neither the [Server]'s +// TLSConfig.Certificates, TLSConfig.GetCertificate nor +// config.GetConfigForClient are populated. +// If the certificate is signed by a certificate authority, the +// certFile should be the concatenation of the server's certificate, +// any intermediates, and the CA's certificate. +// +// ServeTLS always returns a non-nil error. After [Server.Shutdown] or [Server.Close], the +// returned error is [ErrServerClosed]. +func (s *Server) ServeTLS(l net.Listener, certFile, keyFile string) error { + // Setup HTTP/2 before s.Serve, to initialize s.TLSConfig + // before we clone it and create the TLS Listener. + if err := s.setupHTTP2_ServeTLS(); err != nil { + return err + } + + config := cloneTLSConfig(s.TLSConfig) + config.NextProtos = adjustNextProtos(config.NextProtos, s.protocols()) + + configHasCert := len(config.Certificates) > 0 || config.GetCertificate != nil || config.GetConfigForClient != nil + if !configHasCert || certFile != "" || keyFile != "" { + var err error + config.Certificates = make([]tls.Certificate, 1) + config.Certificates[0], err = tls.LoadX509KeyPair(certFile, keyFile) + if err != nil { + return err + } + } + + tlsListener := tls.NewListener(l, config) + return s.Serve(tlsListener) +} + +func (s *Server) protocols() Protocols { + if s.Protocols != nil { + return *s.Protocols // user-configured set + } + + // The historic way of disabling HTTP/2 is to set TLSNextProto to + // a non-nil map with no "h2" entry. + _, hasH2 := s.TLSNextProto["h2"] + http2Disabled := s.TLSNextProto != nil && !hasH2 + + // If GODEBUG=http2server=0, then HTTP/2 is disabled unless + // the user has manually added an "h2" entry to TLSNextProto + // (probably by using x/net/http2 directly). + // if http2server.Value() == "0" && !hasH2 { + // http2Disabled = true + // } + + var p Protocols + p.SetHTTP1(true) // default always includes HTTP/1 + if !http2Disabled { + p.SetHTTP2(true) + } + return p +} + +// adjustNextProtos adds or removes "http/1.1" and "h2" entries from +// a tls.Config.NextProtos list, according to the set of protocols in protos. +func adjustNextProtos(nextProtos []string, protos Protocols) []string { + // Make a copy of NextProtos since it might be shared with some other tls.Config. + // (tls.Config.Clone doesn't do a deep copy.) + // + // We could avoid an allocation in the common case by checking to see if the slice + // is already in order, but this is just one small allocation per connection. + nextProtos = slices.Clone(nextProtos) + var have Protocols + nextProtos = slices.DeleteFunc(nextProtos, func(s string) bool { + switch s { + case "http/1.1": + if !protos.HTTP1() { + return true + } + have.SetHTTP1(true) + case "h2": + if !protos.HTTP2() { + return true + } + have.SetHTTP2(true) + } + return false + }) + if protos.HTTP2() && !have.HTTP2() { + nextProtos = append(nextProtos, "h2") + } + if protos.HTTP1() && !have.HTTP1() { + nextProtos = append(nextProtos, "http/1.1") + } + return nextProtos +} + +// trackListener adds or removes a net.Listener to the set of tracked +// listeners. +// +// We store a pointer to interface in the map set, in case the +// net.Listener is not comparable. This is safe because we only call +// trackListener via Serve and can track+defer untrack the same +// pointer to local variable there. We never need to compare a +// Listener from another caller. +// +// It reports whether the server is still up (not Shutdown or Closed). +func (s *Server) trackListener(ln *net.Listener, add bool) bool { + s.mu.Lock() + defer s.mu.Unlock() + if s.listeners == nil { + s.listeners = make(map[*net.Listener]struct{}) + } + if add { + if s.shuttingDown() { + return false + } + s.listeners[ln] = struct{}{} + s.listenerGroup.Add(1) + } else { + delete(s.listeners, ln) + s.listenerGroup.Done() + } + return true +} + +func (s *Server) trackConn(c *conn, add bool) { + s.mu.Lock() + defer s.mu.Unlock() + if s.activeConn == nil { + s.activeConn = make(map[*conn]struct{}) + } + if add { + s.activeConn[c] = struct{}{} + } else { + delete(s.activeConn, c) + } +} + +func (s *Server) idleTimeout() time.Duration { + if s.IdleTimeout != 0 { + return s.IdleTimeout + } + return s.ReadTimeout +} + +func (s *Server) readHeaderTimeout() time.Duration { + if s.ReadHeaderTimeout != 0 { + return s.ReadHeaderTimeout + } + return s.ReadTimeout +} + +func (s *Server) doKeepAlives() bool { + return !s.disableKeepAlives.Load() && !s.shuttingDown() +} + +func (s *Server) shuttingDown() bool { + return s.inShutdown.Load() +} + +// SetKeepAlivesEnabled controls whether HTTP keep-alives are enabled. +// By default, keep-alives are always enabled. Only very +// resource-constrained environments or servers in the process of +// shutting down should disable them. +func (s *Server) SetKeepAlivesEnabled(v bool) { + if v { + s.disableKeepAlives.Store(false) + return + } + s.disableKeepAlives.Store(true) + + // Close idle HTTP/1 conns: + s.closeIdleConns() + + // TODO: Issue 26303: close HTTP/2 conns as soon as they become idle. +} + +func (s *Server) logf(format string, args ...any) { + if s.ErrorLog != nil { + s.ErrorLog.Printf(format, args...) + } else { + log.Printf(format, args...) + } +} + +// logf prints to the ErrorLog of the *Server associated with request r +// via ServerContextKey. If there's no associated server, or if ErrorLog +// is nil, logging is done via the log package's standard logger. +func logf(r *Request, format string, args ...any) { + s, _ := r.Context().Value(ServerContextKey).(*Server) + if s != nil && s.ErrorLog != nil { + s.ErrorLog.Printf(format, args...) + } else { + log.Printf(format, args...) + } +} + +// ListenAndServe listens on the TCP network address addr and then calls +// [Serve] with handler to handle requests on incoming connections. +// Accepted connections are configured to enable TCP keep-alives. +// +// The handler is typically nil, in which case [DefaultServeMux] is used. +// +// ListenAndServe always returns a non-nil error. +func ListenAndServe(addr string, handler Handler) error { + server := &Server{Addr: addr, Handler: handler} + return server.ListenAndServe() +} + +// ListenAndServeTLS acts identically to [ListenAndServe], except that it +// expects HTTPS connections. Additionally, files containing a certificate and +// matching private key for the server must be provided. If the certificate +// is signed by a certificate authority, the certFile should be the concatenation +// of the server's certificate, any intermediates, and the CA's certificate. +func ListenAndServeTLS(addr, certFile, keyFile string, handler Handler) error { + server := &Server{Addr: addr, Handler: handler} + return server.ListenAndServeTLS(certFile, keyFile) +} + +// ListenAndServeTLS listens on the TCP network address s.Addr and +// then calls [ServeTLS] to handle requests on incoming TLS connections. +// Accepted connections are configured to enable TCP keep-alives. +// +// Filenames containing a certificate and matching private key for the +// server must be provided if neither the [Server]'s TLSConfig.Certificates +// nor TLSConfig.GetCertificate are populated. If the certificate is +// signed by a certificate authority, the certFile should be the +// concatenation of the server's certificate, any intermediates, and +// the CA's certificate. +// +// If s.Addr is blank, ":https" is used. +// +// ListenAndServeTLS always returns a non-nil error. After [Server.Shutdown] or +// [Server.Close], the returned error is [ErrServerClosed]. +func (s *Server) ListenAndServeTLS(certFile, keyFile string) error { + if s.shuttingDown() { + return ErrServerClosed + } + addr := s.Addr + if addr == "" { + addr = ":https" + } + + ln, err := net.Listen("tcp", addr) + if err != nil { + return err + } + + defer ln.Close() + + return s.ServeTLS(ln, certFile, keyFile) +} + +// setupHTTP2_ServeTLS conditionally configures HTTP/2 on +// s and reports whether there was an error setting it up. If it is +// not configured for policy reasons, nil is returned. +func (s *Server) setupHTTP2_ServeTLS() error { + s.nextProtoOnce.Do(s.onceSetNextProtoDefaults) + return s.nextProtoErr +} + +// setupHTTP2_Serve is called from (*Server).Serve and conditionally +// configures HTTP/2 on s using a more conservative policy than +// setupHTTP2_ServeTLS because Serve is called after tls.Listen, +// and may be called concurrently. See shouldConfigureHTTP2ForServe. +// +// The tests named TestTransportAutomaticHTTP2* and +// TestConcurrentServerServe in server_test.go demonstrate some +// of the supported use cases and motivations. +func (s *Server) setupHTTP2_Serve() error { + s.nextProtoOnce.Do(s.onceSetNextProtoDefaults_Serve) + return s.nextProtoErr +} + +func (s *Server) onceSetNextProtoDefaults_Serve() { + if s.shouldConfigureHTTP2ForServe() { + s.onceSetNextProtoDefaults() + } +} + +// var http2server = godebug.New("http2server") + +// onceSetNextProtoDefaults configures HTTP/2, if the user hasn't +// configured otherwise. (by setting s.TLSNextProto non-nil) +// It must only be called via s.nextProtoOnce (use s.setupHTTP2_*). +func (s *Server) onceSetNextProtoDefaults() { + if omitBundledHTTP2 { + return + } + p := s.protocols() + if !p.HTTP2() && !p.UnencryptedHTTP2() { + return + } + // if http2server.Value() == "0" { + // http2server.IncNonDefault() + // return + // } + if _, ok := s.TLSNextProto["h2"]; ok { + // TLSNextProto already contains an HTTP/2 implementation. + // The user probably called golang.org/x/net/http2.ConfigureServer + // to add it. + return + } + conf := &http2Server{} + s.nextProtoErr = http2ConfigureServer(s, conf) +} + +// TimeoutHandler returns a [Handler] that runs h with the given time limit. +// +// The new Handler calls h.ServeHTTP to handle each request, but if a +// call runs for longer than its time limit, the handler responds with +// a 503 Service Unavailable error and the given message in its body. +// (If msg is empty, a suitable default message will be sent.) +// After such a timeout, writes by h to its [ResponseWriter] will return +// [ErrHandlerTimeout]. +// +// TimeoutHandler supports the [Pusher] interface but does not support +// the [Hijacker] or [Flusher] interfaces. +func TimeoutHandler(h Handler, dt time.Duration, msg string) Handler { + return &timeoutHandler{ + handler: h, + body: msg, + dt: dt, + } +} + +// ErrHandlerTimeout is returned on [ResponseWriter] Write calls +// in handlers which have timed out. +var ErrHandlerTimeout = errors.New("http: Handler timeout") + +type timeoutHandler struct { + handler Handler + body string + dt time.Duration + + // When set, no context will be created and this context will + // be used instead. + testContext context.Context +} + +func (h *timeoutHandler) errorBody() string { + if h.body != "" { + return h.body + } + return "Timeout

Timeout

" +} + +func (h *timeoutHandler) ServeHTTP(w ResponseWriter, r *Request) { + ctx := h.testContext + if ctx == nil { + var cancelCtx context.CancelFunc + ctx, cancelCtx = context.WithTimeout(r.Context(), h.dt) + defer cancelCtx() + } + r = r.WithContext(ctx) + done := make(chan struct{}) + tw := &timeoutWriter{ + w: w, + h: make(Header), + req: r, + } + panicChan := make(chan any, 1) + go func() { + defer func() { + if p := recover(); p != nil { + panicChan <- p + } + }() + h.handler.ServeHTTP(tw, r) + close(done) + }() + select { + case p := <-panicChan: + panic(p) + case <-done: + tw.mu.Lock() + defer tw.mu.Unlock() + dst := w.Header() + maps.Copy(dst, tw.h) + if !tw.wroteHeader { + tw.code = StatusOK + } + w.WriteHeader(tw.code) + w.Write(tw.wbuf.Bytes()) + case <-ctx.Done(): + tw.mu.Lock() + defer tw.mu.Unlock() + switch err := ctx.Err(); err { + case context.DeadlineExceeded: + w.WriteHeader(StatusServiceUnavailable) + io.WriteString(w, h.errorBody()) + tw.err = ErrHandlerTimeout + default: + w.WriteHeader(StatusServiceUnavailable) + tw.err = err + } + } +} + +type timeoutWriter struct { + w ResponseWriter + h Header + wbuf bytes.Buffer + req *Request + + mu sync.Mutex + err error + wroteHeader bool + code int +} + +var _ Pusher = (*timeoutWriter)(nil) + +// Push implements the [Pusher] interface. +func (tw *timeoutWriter) Push(target string, opts *PushOptions) error { + if pusher, ok := tw.w.(Pusher); ok { + return pusher.Push(target, opts) + } + return ErrNotSupported +} + +func (tw *timeoutWriter) Header() Header { return tw.h } + +func (tw *timeoutWriter) Write(p []byte) (int, error) { + tw.mu.Lock() + defer tw.mu.Unlock() + if tw.err != nil { + return 0, tw.err + } + if !tw.wroteHeader { + tw.writeHeaderLocked(StatusOK) + } + return tw.wbuf.Write(p) +} + +func (tw *timeoutWriter) writeHeaderLocked(code int) { + checkWriteHeaderCode(code) + + switch { + case tw.err != nil: + return + case tw.wroteHeader: + if tw.req != nil { + caller := relevantCaller() + logf(tw.req, "http: superfluous response.WriteHeader call from %s (%s:%d)", caller.Function, path.Base(caller.File), caller.Line) + } + default: + tw.wroteHeader = true + tw.code = code + } +} + +func (tw *timeoutWriter) WriteHeader(code int) { + tw.mu.Lock() + defer tw.mu.Unlock() + tw.writeHeaderLocked(code) +} + +// onceCloseListener wraps a net.Listener, protecting it from +// multiple Close calls. +type onceCloseListener struct { + net.Listener + once sync.Once + closeErr error +} + +func (oc *onceCloseListener) Close() error { + oc.once.Do(oc.close) + return oc.closeErr +} + +func (oc *onceCloseListener) close() { oc.closeErr = oc.Listener.Close() } + +// globalOptionsHandler responds to "OPTIONS *" requests. +type globalOptionsHandler struct{} + +func (globalOptionsHandler) ServeHTTP(w ResponseWriter, r *Request) { + w.Header().Set("Content-Length", "0") + if r.ContentLength != 0 { + // Read up to 4KB of OPTIONS body (as mentioned in the + // spec as being reserved for future use), but anything + // over that is considered a waste of server resources + // (or an attack) and we abort and close the connection, + // courtesy of MaxBytesReader's EOF behavior. + mb := MaxBytesReader(w, r.Body, 4<<10) + io.Copy(io.Discard, mb) + } +} + +// initALPNRequest is an HTTP handler that initializes certain +// uninitialized fields in its *Request. Such partially-initialized +// Requests come from ALPN protocol handlers. +type initALPNRequest struct { + ctx context.Context + c *tls.Conn + h serverHandler +} + +// BaseContext is an exported but unadvertised [http.Handler] method +// recognized by x/net/http2 to pass down a context; the TLSNextProto +// API predates context support so we shoehorn through the only +// interface we have available. +func (h initALPNRequest) BaseContext() context.Context { return h.ctx } + +func (h initALPNRequest) ServeHTTP(rw ResponseWriter, req *Request) { + if req.TLS == nil { + req.TLS = &tls.ConnectionState{} + *req.TLS = h.c.ConnectionState() + } + if req.Body == nil { + req.Body = NoBody + } + if req.RemoteAddr == "" { + req.RemoteAddr = h.c.RemoteAddr().String() + } + h.h.ServeHTTP(rw, req) +} + +// loggingConn is used for debugging. +type loggingConn struct { + name string + net.Conn +} + +var ( + uniqNameMu sync.Mutex + uniqNameNext = make(map[string]int) +) + +func newLoggingConn(baseName string, c net.Conn) net.Conn { + uniqNameMu.Lock() + defer uniqNameMu.Unlock() + uniqNameNext[baseName]++ + return &loggingConn{ + name: fmt.Sprintf("%s-%d", baseName, uniqNameNext[baseName]), + Conn: c, + } +} + +func (c *loggingConn) Write(p []byte) (n int, err error) { + log.Printf("%s.Write(%d) = ....", c.name, len(p)) + n, err = c.Conn.Write(p) + log.Printf("%s.Write(%d) = %d, %v", c.name, len(p), n, err) + return +} + +func (c *loggingConn) Read(p []byte) (n int, err error) { + log.Printf("%s.Read(%d) = ....", c.name, len(p)) + n, err = c.Conn.Read(p) + log.Printf("%s.Read(%d) = %d, %v", c.name, len(p), n, err) + return +} + +func (c *loggingConn) Close() (err error) { + log.Printf("%s.Close() = ...", c.name) + err = c.Conn.Close() + log.Printf("%s.Close() = %v", c.name, err) + return +} + +// checkConnErrorWriter writes to c.rwc and records any write errors to c.werr. +// It only contains one field (and a pointer field at that), so it +// fits in an interface value without an extra allocation. +type checkConnErrorWriter struct { + c *conn +} + +func (w checkConnErrorWriter) Write(p []byte) (n int, err error) { + n, err = w.c.rwc.Write(p) + if err != nil && w.c.werr == nil { + w.c.werr = err + w.c.cancelCtx() + } + return +} + +func numLeadingCRorLF(v []byte) (n int) { + for _, b := range v { + if b == '\r' || b == '\n' { + n++ + continue + } + break + } + return +} + +// EnableHeaderOrder set the option to enable the ResponseWriter to use the +// HeaderOrderKey in it's headers, for sorting them. +func EnableHeaderOrder(writer ResponseWriter) ResponseWriter { + if res, ok := writer.(*response); ok { + res.enableOrderHeaders = true + return res + } + return writer +} + +// tlsRecordHeaderLooksLikeHTTP reports whether a TLS record header +// looks like it might've been a misdirected plaintext HTTP request. +func tlsRecordHeaderLooksLikeHTTP(hdr [5]byte) bool { + switch string(hdr[:]) { + case "GET /", "HEAD ", "POST ", "PUT /", "OPTIO": + return true + } + return false +} + +// MaxBytesHandler returns a [Handler] that runs h with its [ResponseWriter] and [Request.Body] wrapped by a MaxBytesReader. +func MaxBytesHandler(h Handler, n int64) Handler { + return HandlerFunc(func(w ResponseWriter, r *Request) { + r2 := *r + r2.Body = MaxBytesReader(w, r.Body, n) + h.ServeHTTP(w, &r2) + }) +} diff --git a/backend/vendor/github.com/enetx/http/sniff.go b/backend/vendor/github.com/enetx/http/sniff.go new file mode 100644 index 0000000..ac18ab9 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/sniff.go @@ -0,0 +1,304 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http + +import ( + "bytes" + "encoding/binary" +) + +// The algorithm uses at most sniffLen bytes to make its decision. +const sniffLen = 512 + +// DetectContentType implements the algorithm described +// at https://mimesniff.spec.whatwg.org/ to determine the +// Content-Type of the given data. It considers at most the +// first 512 bytes of data. DetectContentType always returns +// a valid MIME type: if it cannot determine a more specific one, it +// returns "application/octet-stream". +func DetectContentType(data []byte) string { + if len(data) > sniffLen { + data = data[:sniffLen] + } + + // Index of the first non-whitespace byte in data. + firstNonWS := 0 + for ; firstNonWS < len(data) && isWS(data[firstNonWS]); firstNonWS++ { + } + + for _, sig := range sniffSignatures { + if ct := sig.match(data, firstNonWS); ct != "" { + return ct + } + } + + return "application/octet-stream" // fallback +} + +// isWS reports whether the provided byte is a whitespace byte (0xWS) +// as defined in https://mimesniff.spec.whatwg.org/#terminology. +func isWS(b byte) bool { + switch b { + case '\t', '\n', '\x0c', '\r', ' ': + return true + } + return false +} + +// isTT reports whether the provided byte is a tag-terminating byte (0xTT) +// as defined in https://mimesniff.spec.whatwg.org/#terminology. +func isTT(b byte) bool { + switch b { + case ' ', '>': + return true + } + return false +} + +type sniffSig interface { + // match returns the MIME type of the data, or "" if unknown. + match(data []byte, firstNonWS int) string +} + +// Data matching the table in section 6. +var sniffSignatures = []sniffSig{ + htmlSig(" 255 { + return nil, errors.New("too many authentication methods") + } + b = append(b, byte(len(ams))) + for _, am := range ams { + b = append(b, byte(am)) + } + } + if _, ctxErr = c.Write(b); ctxErr != nil { + return + } + + if _, ctxErr = io.ReadFull(c, b[:2]); ctxErr != nil { + return + } + if b[0] != socksVersion5 { + return nil, errors.New("unexpected protocol version " + strconv.Itoa(int(b[0]))) + } + am := socksAuthMethod(b[1]) + if am == socksAuthMethodNoAcceptableMethods { + return nil, errors.New("no acceptable authentication methods") + } + if d.Authenticate != nil { + if ctxErr = d.Authenticate(ctx, c, am); ctxErr != nil { + return + } + } + + b = b[:0] + b = append(b, socksVersion5, byte(d.cmd), 0) + if ip := net.ParseIP(host); ip != nil { + if ip4 := ip.To4(); ip4 != nil { + b = append(b, socksAddrTypeIPv4) + b = append(b, ip4...) + } else if ip6 := ip.To16(); ip6 != nil { + b = append(b, socksAddrTypeIPv6) + b = append(b, ip6...) + } else { + return nil, errors.New("unknown address type") + } + } else { + if len(host) > 255 { + return nil, errors.New("FQDN too long") + } + b = append(b, socksAddrTypeFQDN) + b = append(b, byte(len(host))) + b = append(b, host...) + } + b = append(b, byte(port>>8), byte(port)) + if _, ctxErr = c.Write(b); ctxErr != nil { + return + } + + if _, ctxErr = io.ReadFull(c, b[:4]); ctxErr != nil { + return + } + if b[0] != socksVersion5 { + return nil, errors.New("unexpected protocol version " + strconv.Itoa(int(b[0]))) + } + if cmdErr := socksReply(b[1]); cmdErr != socksStatusSucceeded { + return nil, errors.New("unknown error " + cmdErr.String()) + } + if b[2] != 0 { + return nil, errors.New("non-zero reserved field") + } + l := 2 + var a socksAddr + switch b[3] { + case socksAddrTypeIPv4: + l += net.IPv4len + a.IP = make(net.IP, net.IPv4len) + case socksAddrTypeIPv6: + l += net.IPv6len + a.IP = make(net.IP, net.IPv6len) + case socksAddrTypeFQDN: + if _, err := io.ReadFull(c, b[:1]); err != nil { + return nil, err + } + l += int(b[0]) + default: + return nil, errors.New("unknown address type " + strconv.Itoa(int(b[3]))) + } + if cap(b) < l { + b = make([]byte, l) + } else { + b = b[:l] + } + if _, ctxErr = io.ReadFull(c, b); ctxErr != nil { + return + } + if a.IP != nil { + copy(a.IP, b) + } else { + a.Name = string(b[:len(b)-2]) + } + a.Port = int(b[len(b)-2])<<8 | int(b[len(b)-1]) + return &a, nil +} + +func sockssplitHostPort(address string) (string, int, error) { + host, port, err := net.SplitHostPort(address) + if err != nil { + return "", 0, err + } + portnum, err := strconv.Atoi(port) + if err != nil { + return "", 0, err + } + if 1 > portnum || portnum > 0xffff { + return "", 0, errors.New("port number out of range " + port) + } + return host, portnum, nil +} + +// A Command represents a SOCKS command. +type socksCommand int + +func (cmd socksCommand) String() string { + switch cmd { + case socksCmdConnect: + return "socks connect" + case sockscmdBind: + return "socks bind" + default: + return "socks " + strconv.Itoa(int(cmd)) + } +} + +// An AuthMethod represents a SOCKS authentication method. +type socksAuthMethod int + +// A Reply represents a SOCKS command reply code. +type socksReply int + +func (code socksReply) String() string { + switch code { + case socksStatusSucceeded: + return "succeeded" + case 0x01: + return "general SOCKS server failure" + case 0x02: + return "connection not allowed by ruleset" + case 0x03: + return "network unreachable" + case 0x04: + return "host unreachable" + case 0x05: + return "connection refused" + case 0x06: + return "TTL expired" + case 0x07: + return "command not supported" + case 0x08: + return "address type not supported" + default: + return "unknown code: " + strconv.Itoa(int(code)) + } +} + +// Wire protocol constants. +const ( + socksVersion5 = 0x05 + + socksAddrTypeIPv4 = 0x01 + socksAddrTypeFQDN = 0x03 + socksAddrTypeIPv6 = 0x04 + + socksCmdConnect socksCommand = 0x01 // establishes an active-open forward proxy connection + sockscmdBind socksCommand = 0x02 // establishes a passive-open forward proxy connection + + socksAuthMethodNotRequired socksAuthMethod = 0x00 // no authentication required + socksAuthMethodUsernamePassword socksAuthMethod = 0x02 // use username/password + socksAuthMethodNoAcceptableMethods socksAuthMethod = 0xff // no acceptable authentication methods + + socksStatusSucceeded socksReply = 0x00 +) + +// An Addr represents a SOCKS-specific address. +// Either Name or IP is used exclusively. +type socksAddr struct { + Name string // fully-qualified domain name + IP net.IP + Port int +} + +func (a *socksAddr) Network() string { return "socks" } + +func (a *socksAddr) String() string { + if a == nil { + return "" + } + port := strconv.Itoa(a.Port) + if a.IP == nil { + return net.JoinHostPort(a.Name, port) + } + return net.JoinHostPort(a.IP.String(), port) +} + +// A Conn represents a forward proxy connection. +type socksConn struct { + net.Conn + + boundAddr net.Addr +} + +// BoundAddr returns the address assigned by the proxy server for +// connecting to the command target address from the proxy server. +func (c *socksConn) BoundAddr() net.Addr { + if c == nil { + return nil + } + return c.boundAddr +} + +// A Dialer holds SOCKS-specific options. +type socksDialer struct { + cmd socksCommand // either CmdConnect or cmdBind + proxyNetwork string // network between a proxy server and a client + proxyAddress string // proxy server address + + // ProxyDial specifies the optional dial function for + // establishing the transport connection. + ProxyDial func(context.Context, string, string) (net.Conn, error) + + // AuthMethods specifies the list of request authentication + // methods. + // If empty, SOCKS client requests only AuthMethodNotRequired. + AuthMethods []socksAuthMethod + + // Authenticate specifies the optional authentication + // function. It must be non-nil when AuthMethods is not empty. + // It must return an error when the authentication is failed. + Authenticate func(context.Context, io.ReadWriter, socksAuthMethod) error +} + +// DialContext connects to the provided address on the provided +// network. +// +// The returned error value may be a net.OpError. When the Op field of +// net.OpError contains "socks", the Source field contains a proxy +// server address and the Addr field contains a command target +// address. +// +// See func Dial of the net package of standard library for a +// description of the network and address parameters. +func (d *socksDialer) DialContext(ctx context.Context, network, address string) (net.Conn, error) { + if err := d.validateTarget(network, address); err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + if ctx == nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: errors.New("nil context")} + } + var err error + var c net.Conn + if d.ProxyDial != nil { + c, err = d.ProxyDial(ctx, d.proxyNetwork, d.proxyAddress) + } else { + var dd net.Dialer + c, err = dd.DialContext(ctx, d.proxyNetwork, d.proxyAddress) + } + if err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + a, err := d.connect(ctx, c, address) + if err != nil { + c.Close() + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + return &socksConn{Conn: c, boundAddr: a}, nil +} + +// DialWithConn initiates a connection from SOCKS server to the target +// network and address using the connection c that is already +// connected to the SOCKS server. +// +// It returns the connection's local address assigned by the SOCKS +// server. +func (d *socksDialer) DialWithConn(ctx context.Context, c net.Conn, network, address string) (net.Addr, error) { + if err := d.validateTarget(network, address); err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + if ctx == nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: errors.New("nil context")} + } + a, err := d.connect(ctx, c, address) + if err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + return a, nil +} + +// Dial connects to the provided address on the provided network. +// +// Unlike DialContext, it returns a raw transport connection instead +// of a forward proxy connection. +// +// Deprecated: Use DialContext or DialWithConn instead. +func (d *socksDialer) Dial(network, address string) (net.Conn, error) { + if err := d.validateTarget(network, address); err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + var err error + var c net.Conn + if d.ProxyDial != nil { + c, err = d.ProxyDial(context.Background(), d.proxyNetwork, d.proxyAddress) + } else { + c, err = net.Dial(d.proxyNetwork, d.proxyAddress) + } + if err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + if _, err := d.DialWithConn(context.Background(), c, network, address); err != nil { + c.Close() + return nil, err + } + return c, nil +} + +func (d *socksDialer) validateTarget(network, address string) error { + switch network { + case "tcp", "tcp6", "tcp4": + default: + return errors.New("network not implemented") + } + switch d.cmd { + case socksCmdConnect, sockscmdBind: + default: + return errors.New("command not implemented") + } + return nil +} + +func (d *socksDialer) pathAddrs(address string) (proxy, dst net.Addr, err error) { + for i, s := range []string{d.proxyAddress, address} { + host, port, err := sockssplitHostPort(s) + if err != nil { + return nil, nil, err + } + a := &socksAddr{Port: port} + a.IP = net.ParseIP(host) + if a.IP == nil { + a.Name = host + } + if i == 0 { + proxy = a + } else { + dst = a + } + } + return +} + +// NewDialer returns a new Dialer that dials through the provided +// proxy server's network and address. +func socksNewDialer(network, address string) *socksDialer { + return &socksDialer{proxyNetwork: network, proxyAddress: address, cmd: socksCmdConnect} +} + +const ( + socksauthUsernamePasswordVersion = 0x01 + socksauthStatusSucceeded = 0x00 +) + +// UsernamePassword are the credentials for the username/password +// authentication method. +type socksUsernamePassword struct { + Username string + Password string +} + +// Authenticate authenticates a pair of username and password with the +// proxy server. +func (up *socksUsernamePassword) Authenticate(ctx context.Context, rw io.ReadWriter, auth socksAuthMethod) error { + switch auth { + case socksAuthMethodNotRequired: + return nil + case socksAuthMethodUsernamePassword: + if len(up.Username) == 0 || len(up.Username) > 255 || len(up.Password) > 255 { + return errors.New("invalid username/password") + } + b := []byte{socksauthUsernamePasswordVersion} + b = append(b, byte(len(up.Username))) + b = append(b, up.Username...) + b = append(b, byte(len(up.Password))) + b = append(b, up.Password...) + // TODO(mikio): handle IO deadlines and cancelation if + // necessary + if _, err := rw.Write(b); err != nil { + return err + } + if _, err := io.ReadFull(rw, b[:2]); err != nil { + return err + } + if b[0] != socksauthUsernamePasswordVersion { + return errors.New("invalid username/password version") + } + if b[1] != socksauthStatusSucceeded { + return errors.New("username/password authentication failed") + } + return nil + } + return errors.New("unsupported authentication method " + strconv.Itoa(int(auth))) +} diff --git a/backend/vendor/github.com/enetx/http/status.go b/backend/vendor/github.com/enetx/http/status.go new file mode 100644 index 0000000..cd90877 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/status.go @@ -0,0 +1,210 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http + +// HTTP status codes as registered with IANA. +// See: https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml +const ( + StatusContinue = 100 // RFC 9110, 15.2.1 + StatusSwitchingProtocols = 101 // RFC 9110, 15.2.2 + StatusProcessing = 102 // RFC 2518, 10.1 + StatusEarlyHints = 103 // RFC 8297 + + StatusOK = 200 // RFC 9110, 15.3.1 + StatusCreated = 201 // RFC 9110, 15.3.2 + StatusAccepted = 202 // RFC 9110, 15.3.3 + StatusNonAuthoritativeInfo = 203 // RFC 9110, 15.3.4 + StatusNoContent = 204 // RFC 9110, 15.3.5 + StatusResetContent = 205 // RFC 9110, 15.3.6 + StatusPartialContent = 206 // RFC 9110, 15.3.7 + StatusMultiStatus = 207 // RFC 4918, 11.1 + StatusAlreadyReported = 208 // RFC 5842, 7.1 + StatusIMUsed = 226 // RFC 3229, 10.4.1 + + StatusMultipleChoices = 300 // RFC 9110, 15.4.1 + StatusMovedPermanently = 301 // RFC 9110, 15.4.2 + StatusFound = 302 // RFC 9110, 15.4.3 + StatusSeeOther = 303 // RFC 9110, 15.4.4 + StatusNotModified = 304 // RFC 9110, 15.4.5 + StatusUseProxy = 305 // RFC 9110, 15.4.6 + _ = 306 // RFC 9110, 15.4.7 (Unused) + StatusTemporaryRedirect = 307 // RFC 9110, 15.4.8 + StatusPermanentRedirect = 308 // RFC 9110, 15.4.9 + + StatusBadRequest = 400 // RFC 9110, 15.5.1 + StatusUnauthorized = 401 // RFC 9110, 15.5.2 + StatusPaymentRequired = 402 // RFC 9110, 15.5.3 + StatusForbidden = 403 // RFC 9110, 15.5.4 + StatusNotFound = 404 // RFC 9110, 15.5.5 + StatusMethodNotAllowed = 405 // RFC 9110, 15.5.6 + StatusNotAcceptable = 406 // RFC 9110, 15.5.7 + StatusProxyAuthRequired = 407 // RFC 9110, 15.5.8 + StatusRequestTimeout = 408 // RFC 9110, 15.5.9 + StatusConflict = 409 // RFC 9110, 15.5.10 + StatusGone = 410 // RFC 9110, 15.5.11 + StatusLengthRequired = 411 // RFC 9110, 15.5.12 + StatusPreconditionFailed = 412 // RFC 9110, 15.5.13 + StatusRequestEntityTooLarge = 413 // RFC 9110, 15.5.14 + StatusRequestURITooLong = 414 // RFC 9110, 15.5.15 + StatusUnsupportedMediaType = 415 // RFC 9110, 15.5.16 + StatusRequestedRangeNotSatisfiable = 416 // RFC 9110, 15.5.17 + StatusExpectationFailed = 417 // RFC 9110, 15.5.18 + StatusTeapot = 418 // RFC 9110, 15.5.19 (Unused) + StatusMisdirectedRequest = 421 // RFC 9110, 15.5.20 + StatusUnprocessableEntity = 422 // RFC 9110, 15.5.21 + StatusLocked = 423 // RFC 4918, 11.3 + StatusFailedDependency = 424 // RFC 4918, 11.4 + StatusTooEarly = 425 // RFC 8470, 5.2. + StatusUpgradeRequired = 426 // RFC 9110, 15.5.22 + StatusPreconditionRequired = 428 // RFC 6585, 3 + StatusTooManyRequests = 429 // RFC 6585, 4 + StatusRequestHeaderFieldsTooLarge = 431 // RFC 6585, 5 + StatusUnavailableForLegalReasons = 451 // RFC 7725, 3 + + StatusInternalServerError = 500 // RFC 9110, 15.6.1 + StatusNotImplemented = 501 // RFC 9110, 15.6.2 + StatusBadGateway = 502 // RFC 9110, 15.6.3 + StatusServiceUnavailable = 503 // RFC 9110, 15.6.4 + StatusGatewayTimeout = 504 // RFC 9110, 15.6.5 + StatusHTTPVersionNotSupported = 505 // RFC 9110, 15.6.6 + StatusVariantAlsoNegotiates = 506 // RFC 2295, 8.1 + StatusInsufficientStorage = 507 // RFC 4918, 11.5 + StatusLoopDetected = 508 // RFC 5842, 7.2 + StatusNotExtended = 510 // RFC 2774, 7 + StatusNetworkAuthenticationRequired = 511 // RFC 6585, 6 +) + +// StatusText returns a text for the HTTP status code. It returns the empty +// string if the code is unknown. +func StatusText(code int) string { + switch code { + case StatusContinue: + return "Continue" + case StatusSwitchingProtocols: + return "Switching Protocols" + case StatusProcessing: + return "Processing" + case StatusEarlyHints: + return "Early Hints" + case StatusOK: + return "OK" + case StatusCreated: + return "Created" + case StatusAccepted: + return "Accepted" + case StatusNonAuthoritativeInfo: + return "Non-Authoritative Information" + case StatusNoContent: + return "No Content" + case StatusResetContent: + return "Reset Content" + case StatusPartialContent: + return "Partial Content" + case StatusMultiStatus: + return "Multi-Status" + case StatusAlreadyReported: + return "Already Reported" + case StatusIMUsed: + return "IM Used" + case StatusMultipleChoices: + return "Multiple Choices" + case StatusMovedPermanently: + return "Moved Permanently" + case StatusFound: + return "Found" + case StatusSeeOther: + return "See Other" + case StatusNotModified: + return "Not Modified" + case StatusUseProxy: + return "Use Proxy" + case StatusTemporaryRedirect: + return "Temporary Redirect" + case StatusPermanentRedirect: + return "Permanent Redirect" + case StatusBadRequest: + return "Bad Request" + case StatusUnauthorized: + return "Unauthorized" + case StatusPaymentRequired: + return "Payment Required" + case StatusForbidden: + return "Forbidden" + case StatusNotFound: + return "Not Found" + case StatusMethodNotAllowed: + return "Method Not Allowed" + case StatusNotAcceptable: + return "Not Acceptable" + case StatusProxyAuthRequired: + return "Proxy Authentication Required" + case StatusRequestTimeout: + return "Request Timeout" + case StatusConflict: + return "Conflict" + case StatusGone: + return "Gone" + case StatusLengthRequired: + return "Length Required" + case StatusPreconditionFailed: + return "Precondition Failed" + case StatusRequestEntityTooLarge: + return "Request Entity Too Large" + case StatusRequestURITooLong: + return "Request URI Too Long" + case StatusUnsupportedMediaType: + return "Unsupported Media Type" + case StatusRequestedRangeNotSatisfiable: + return "Requested Range Not Satisfiable" + case StatusExpectationFailed: + return "Expectation Failed" + case StatusTeapot: + return "I'm a teapot" + case StatusMisdirectedRequest: + return "Misdirected Request" + case StatusUnprocessableEntity: + return "Unprocessable Entity" + case StatusLocked: + return "Locked" + case StatusFailedDependency: + return "Failed Dependency" + case StatusTooEarly: + return "Too Early" + case StatusUpgradeRequired: + return "Upgrade Required" + case StatusPreconditionRequired: + return "Precondition Required" + case StatusTooManyRequests: + return "Too Many Requests" + case StatusRequestHeaderFieldsTooLarge: + return "Request Header Fields Too Large" + case StatusUnavailableForLegalReasons: + return "Unavailable For Legal Reasons" + case StatusInternalServerError: + return "Internal Server Error" + case StatusNotImplemented: + return "Not Implemented" + case StatusBadGateway: + return "Bad Gateway" + case StatusServiceUnavailable: + return "Service Unavailable" + case StatusGatewayTimeout: + return "Gateway Timeout" + case StatusHTTPVersionNotSupported: + return "HTTP Version Not Supported" + case StatusVariantAlsoNegotiates: + return "Variant Also Negotiates" + case StatusInsufficientStorage: + return "Insufficient Storage" + case StatusLoopDetected: + return "Loop Detected" + case StatusNotExtended: + return "Not Extended" + case StatusNetworkAuthenticationRequired: + return "Network Authentication Required" + default: + return "" + } +} diff --git a/backend/vendor/github.com/enetx/http/transfer.go b/backend/vendor/github.com/enetx/http/transfer.go new file mode 100644 index 0000000..3d2be7e --- /dev/null +++ b/backend/vendor/github.com/enetx/http/transfer.go @@ -0,0 +1,1134 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http + +import ( + "bufio" + "bytes" + "errors" + "fmt" + "io" + "net/textproto" + "maps" + "reflect" + "slices" + "strconv" + "strings" + "sync" + "time" + + "github.com/enetx/http/httptrace" + "github.com/enetx/http/internal" + "github.com/enetx/http/internal/ascii" + + "golang.org/x/net/http/httpguts" +) + +// ErrLineTooLong is returned when reading request or response bodies +// with malformed chunked encoding. +var ErrLineTooLong = internal.ErrLineTooLong + +type errorReader struct { + err error +} + +func (r errorReader) Read(p []byte) (n int, err error) { + return 0, r.err +} + +type byteReader struct { + b byte + done bool +} + +func (br *byteReader) Read(p []byte) (n int, err error) { + if br.done { + return 0, io.EOF + } + if len(p) == 0 { + return 0, nil + } + br.done = true + p[0] = br.b + return 1, io.EOF +} + +// transferWriter inspects the fields of a user-supplied Request or Response, +// sanitizes them without changing the user object and provides methods for +// writing the respective header, body and trailer in wire format. +type transferWriter struct { + Method string + Body io.Reader + BodyCloser io.Closer + ResponseToHEAD bool + ContentLength int64 // -1 means unknown, 0 means exactly none + Close bool + TransferEncoding []string + Header Header + Trailer Header + IsResponse bool + bodyReadError error // any non-EOF error from reading Body + + FlushHeaders bool // flush headers to network before body + ByteReadCh chan readResult // non-nil if probeRequestBody called +} + +func newTransferWriter(r any) (t *transferWriter, err error) { + t = &transferWriter{} + + // Extract relevant fields + atLeastHTTP11 := false + switch rr := r.(type) { + case *Request: + if rr.ContentLength != 0 && rr.Body == nil { + return nil, fmt.Errorf("http: Request.ContentLength=%d with nil Body", rr.ContentLength) + } + t.Method = valueOrDefault(rr.Method, "GET") + t.Close = rr.Close + t.TransferEncoding = rr.TransferEncoding + t.Header = rr.Header + t.Trailer = rr.Trailer + t.Body = rr.Body + t.BodyCloser = rr.Body + t.ContentLength = rr.outgoingLength() + if t.ContentLength < 0 && len(t.TransferEncoding) == 0 && t.shouldSendChunkedRequestBody() { + t.TransferEncoding = []string{"chunked"} + } + // If there's a body, conservatively flush the headers + // to any bufio.Writer we're writing to, just in case + // the server needs the headers early, before we copy + // the body and possibly block. We make an exception + // for the common standard library in-memory types, + // though, to avoid unnecessary TCP packets on the + // wire. (Issue 22088.) + if t.ContentLength != 0 && !isKnownInMemoryReader(t.Body) { + t.FlushHeaders = true + } + + atLeastHTTP11 = true // Transport requests are always 1.1 or 2.0 + case *Response: + t.IsResponse = true + if rr.Request != nil { + t.Method = rr.Request.Method + } + t.Body = rr.Body + t.BodyCloser = rr.Body + t.ContentLength = rr.ContentLength + t.Close = rr.Close + t.TransferEncoding = rr.TransferEncoding + t.Header = rr.Header + t.Trailer = rr.Trailer + atLeastHTTP11 = rr.ProtoAtLeast(1, 1) + t.ResponseToHEAD = noResponseBodyExpected(t.Method) + } + + // Sanitize Body,ContentLength,TransferEncoding + if t.ResponseToHEAD { + t.Body = nil + if chunked(t.TransferEncoding) { + t.ContentLength = -1 + } + } else { + if !atLeastHTTP11 || t.Body == nil { + t.TransferEncoding = nil + } + if chunked(t.TransferEncoding) { + t.ContentLength = -1 + } else if t.Body == nil { // no chunking, no body + t.ContentLength = 0 + } + } + + // Sanitize Trailer + if !chunked(t.TransferEncoding) { + t.Trailer = nil + } + + return t, nil +} + +// shouldSendChunkedRequestBody reports whether we should try to send a +// chunked request body to the server. In particular, the case we really +// want to prevent is sending a GET or other typically-bodyless request to a +// server with a chunked body when the body has zero bytes, since GETs with +// bodies (while acceptable according to specs), even zero-byte chunked +// bodies, are approximately never seen in the wild and confuse most +// servers. See Issue 18257, as one example. +// +// The only reason we'd send such a request is if the user set the Body to a +// non-nil value (say, io.NopCloser(bytes.NewReader(nil))) and didn't +// set ContentLength, or NewRequest set it to -1 (unknown), so then we assume +// there's bytes to send. +// +// This code tries to read a byte from the Request.Body in such cases to see +// whether the body actually has content (super rare) or is actually just +// a non-nil content-less ReadCloser (the more common case). In that more +// common case, we act as if their Body were nil instead, and don't send +// a body. +func (t *transferWriter) shouldSendChunkedRequestBody() bool { + // Note that t.ContentLength is the corrected content length + // from rr.outgoingLength, so 0 actually means zero, not unknown. + if t.ContentLength >= 0 || t.Body == nil { // redundant checks; caller did them + return false + } + if t.Method == "CONNECT" { + return false + } + if requestMethodUsuallyLacksBody(t.Method) { + // Only probe the Request.Body for GET/HEAD/DELETE/etc + // requests, because it's only those types of requests + // that confuse servers. + t.probeRequestBody() // adjusts t.Body, t.ContentLength + return t.Body != nil + } + // For all other request types (PUT, POST, PATCH, or anything + // made-up we've never heard of), assume it's normal and the server + // can deal with a chunked request body. Maybe we'll adjust this + // later. + return true +} + +// probeRequestBody reads a byte from t.Body to see whether it's empty +// (returns io.EOF right away). +// +// But because we've had problems with this blocking users in the past +// (issue 17480) when the body is a pipe (perhaps waiting on the response +// headers before the pipe is fed data), we need to be careful and bound how +// long we wait for it. This delay will only affect users if all the following +// are true: +// - the request body blocks +// - the content length is not set (or set to -1) +// - the method doesn't usually have a body (GET, HEAD, DELETE, ...) +// - there is no transfer-encoding=chunked already set. +// +// In other words, this delay will not normally affect anybody, and there +// are workarounds if it does. +func (t *transferWriter) probeRequestBody() { + t.ByteReadCh = make(chan readResult, 1) + go func(body io.Reader) { + var buf [1]byte + var rres readResult + rres.n, rres.err = body.Read(buf[:]) + if rres.n == 1 { + rres.b = buf[0] + } + t.ByteReadCh <- rres + close(t.ByteReadCh) + }(t.Body) + timer := time.NewTimer(200 * time.Millisecond) + select { + case rres := <-t.ByteReadCh: + timer.Stop() + if rres.n == 0 && rres.err == io.EOF { + // It was empty. + t.Body = nil + t.ContentLength = 0 + } else if rres.n == 1 { + if rres.err != nil { + t.Body = io.MultiReader(&byteReader{b: rres.b}, errorReader{rres.err}) + } else { + t.Body = io.MultiReader(&byteReader{b: rres.b}, t.Body) + } + } else if rres.err != nil { + t.Body = errorReader{rres.err} + } + case <-timer.C: + // Too slow. Don't wait. Read it later, and keep + // assuming that this is ContentLength == -1 + // (unknown), which means we'll send a + // "Transfer-Encoding: chunked" header. + t.Body = io.MultiReader(finishAsyncByteRead{t}, t.Body) + // Request that Request.Write flush the headers to the + // network before writing the body, since our body may not + // become readable until it's seen the response headers. + t.FlushHeaders = true + } +} + +func noResponseBodyExpected(requestMethod string) bool { + return requestMethod == "HEAD" +} + +func (t *transferWriter) shouldSendContentLength() bool { + if chunked(t.TransferEncoding) { + return false + } + if t.ContentLength > 0 { + return true + } + if t.ContentLength < 0 { + return false + } + // Many servers expect a Content-Length for these methods + if t.Method == "POST" || t.Method == "PUT" || t.Method == "PATCH" { + return true + } + if t.ContentLength == 0 && isIdentity(t.TransferEncoding) { + if t.Method == "GET" || t.Method == "HEAD" { + return false + } + return true + } + + return false +} + +func (t *transferWriter) writeHeader(w io.Writer, trace *httptrace.ClientTrace) error { + if t.Close && !hasToken(t.Header.get("Connection"), "close") { + if _, err := io.WriteString(w, "Connection: close\r\n"); err != nil { + return err + } + if trace != nil && trace.WroteHeaderField != nil { + trace.WroteHeaderField("Connection", []string{"close"}) + } + } + + // Write Content-Length and/or Transfer-Encoding whose values are a + // function of the sanitized field triple (Body, ContentLength, + // TransferEncoding) + if t.shouldSendContentLength() { + if _, err := io.WriteString(w, "Content-Length: "); err != nil { + return err + } + if _, err := io.WriteString(w, strconv.FormatInt(t.ContentLength, 10)+"\r\n"); err != nil { + return err + } + if trace != nil && trace.WroteHeaderField != nil { + trace.WroteHeaderField("Content-Length", []string{strconv.FormatInt(t.ContentLength, 10)}) + } + } else if chunked(t.TransferEncoding) { + if _, err := io.WriteString(w, "Transfer-Encoding: chunked\r\n"); err != nil { + return err + } + if trace != nil && trace.WroteHeaderField != nil { + trace.WroteHeaderField("Transfer-Encoding", []string{"chunked"}) + } + } + + // Write Trailer header + if t.Trailer != nil { + keys := make([]string, 0, len(t.Trailer)) + for k := range t.Trailer { + k = CanonicalHeaderKey(k) + switch k { + case "Transfer-Encoding", "Trailer", "Content-Length": + return badStringError("invalid Trailer key", k) + } + keys = append(keys, k) + } + if len(keys) > 0 { + slices.Sort(keys) + // TODO: could do better allocation-wise here, but trailers are rare, + // so being lazy for now. + if _, err := io.WriteString(w, "Trailer: "+strings.Join(keys, ",")+"\r\n"); err != nil { + return err + } + if trace != nil && trace.WroteHeaderField != nil { + trace.WroteHeaderField("Trailer", keys) + } + } + } + + return nil +} + +// always closes t.BodyCloser +func (t *transferWriter) writeBody(w io.Writer) (err error) { + var ncopy int64 + closed := false + defer func() { + if closed || t.BodyCloser == nil { + return + } + if closeErr := t.BodyCloser.Close(); closeErr != nil && err == nil { + err = closeErr + } + }() + + // Write body. We "unwrap" the body first if it was wrapped in a + // nopCloser or readTrackingBody. This is to ensure that we can take advantage of + // OS-level optimizations in the event that the body is an + // *os.File. + if !t.ResponseToHEAD && t.Body != nil { + var body = t.unwrapBody() + if chunked(t.TransferEncoding) { + if bw, ok := w.(*bufio.Writer); ok && !t.IsResponse { + w = &internal.FlushAfterChunkWriter{Writer: bw} + } + cw := internal.NewChunkedWriter(w) + _, err = t.doBodyCopy(cw, body) + if err == nil { + err = cw.Close() + } + } else if t.ContentLength == -1 { + dst := w + if t.Method == "CONNECT" { + dst = bufioFlushWriter{dst} + } + ncopy, err = t.doBodyCopy(dst, body) + } else { + ncopy, err = t.doBodyCopy(w, io.LimitReader(body, t.ContentLength)) + if err != nil { + return err + } + var nextra int64 + nextra, err = t.doBodyCopy(io.Discard, body) + ncopy += nextra + } + if err != nil { + return err + } + } + if t.BodyCloser != nil { + closed = true + if err := t.BodyCloser.Close(); err != nil { + return err + } + } + + if !t.ResponseToHEAD && t.ContentLength != -1 && t.ContentLength != ncopy { + return fmt.Errorf("http: ContentLength=%d with Body length %d", + t.ContentLength, ncopy) + } + + if !t.ResponseToHEAD && chunked(t.TransferEncoding) { + // Write Trailer header + if t.Trailer != nil { + if err := t.Trailer.Write(w); err != nil { + return err + } + } + // Last chunk, empty trailer + _, err = io.WriteString(w, "\r\n") + } + return err +} + +// doBodyCopy wraps a copy operation, with any resulting error also +// being saved in bodyReadError. +// +// This function is only intended for use in writeBody. +func (t *transferWriter) doBodyCopy(dst io.Writer, src io.Reader) (n int64, err error) { + buf := getCopyBuf() + defer putCopyBuf(buf) + + n, err = io.CopyBuffer(dst, src, buf) + if err != nil && err != io.EOF { + t.bodyReadError = err + } + return +} + +// unwrapBody unwraps the body's inner reader if it's a +// nopCloser. This is to ensure that body writes sourced from local +// files (*os.File types) are properly optimized. +// +// This function is only intended for use in writeBody. +func (t *transferWriter) unwrapBody() io.Reader { + if r, ok := unwrapNopCloser(t.Body); ok { + return r + } + if r, ok := t.Body.(*readTrackingBody); ok { + r.didRead = true + return r.ReadCloser + } + return t.Body +} + +type transferReader struct { + // Input + Header Header + StatusCode int + RequestMethod string + ProtoMajor int + ProtoMinor int + // Output + Body io.ReadCloser + ContentLength int64 + Chunked bool + Close bool + Trailer Header +} + +func (t *transferReader) protoAtLeast(m, n int) bool { + return t.ProtoMajor > m || (t.ProtoMajor == m && t.ProtoMinor >= n) +} + +// bodyAllowedForStatus reports whether a given response status code +// permits a body. See RFC 7230, section 3.3. +func bodyAllowedForStatus(status int) bool { + switch { + case status >= 100 && status <= 199: + return false + case status == 204: + return false + case status == 304: + return false + } + return true +} + +var ( + suppressedHeaders304 = []string{"Content-Type", "Content-Length", "Transfer-Encoding"} + suppressedHeadersNoBody = []string{"Content-Length", "Transfer-Encoding"} + excludedHeadersNoBody = map[string]bool{"Content-Length": true, "Transfer-Encoding": true} +) + +func suppressedHeaders(status int) []string { + switch { + case status == 304: + // RFC 7232 section 4.1 + return suppressedHeaders304 + case !bodyAllowedForStatus(status): + return suppressedHeadersNoBody + } + return nil +} + +// msg is *Request or *Response. +func readTransfer(msg any, r *bufio.Reader) (err error) { + t := &transferReader{RequestMethod: "GET"} + + // Unify input + isResponse := false + switch rr := msg.(type) { + case *Response: + t.Header = rr.Header + t.StatusCode = rr.StatusCode + t.ProtoMajor = rr.ProtoMajor + t.ProtoMinor = rr.ProtoMinor + t.Close = shouldClose(t.ProtoMajor, t.ProtoMinor, t.Header, true) + isResponse = true + if rr.Request != nil { + t.RequestMethod = rr.Request.Method + } + case *Request: + t.Header = rr.Header + t.RequestMethod = rr.Method + t.ProtoMajor = rr.ProtoMajor + t.ProtoMinor = rr.ProtoMinor + // Transfer semantics for Requests are exactly like those for + // Responses with status code 200, responding to a GET method + t.StatusCode = 200 + t.Close = rr.Close + default: + panic("unexpected type") + } + + // Default to HTTP/1.1 + if t.ProtoMajor == 0 && t.ProtoMinor == 0 { + t.ProtoMajor, t.ProtoMinor = 1, 1 + } + + // Transfer-Encoding: chunked, and overriding Content-Length. + if err := t.parseTransferEncoding(); err != nil { + return err + } + + realLength, err := fixLength(isResponse, t.StatusCode, t.RequestMethod, t.Header, t.Chunked) + if err != nil { + return err + } + if isResponse && t.RequestMethod == "HEAD" { + if n, err := parseContentLength(t.Header["Content-Length"]); err != nil { + return err + } else { + t.ContentLength = n + } + } else { + t.ContentLength = realLength + } + + // Trailer + t.Trailer, err = fixTrailer(t.Header, t.Chunked) + if err != nil { + return err + } + + // If there is no Content-Length or chunked Transfer-Encoding on a *Response + // and the status is not 1xx, 204 or 304, then the body is unbounded. + // See RFC 7230, section 3.3. + switch msg.(type) { + case *Response: + if realLength == -1 && !t.Chunked && bodyAllowedForStatus(t.StatusCode) { + // Unbounded body. + t.Close = true + } + } + + // Prepare body reader. ContentLength < 0 means chunked encoding + // or close connection when finished, since multipart is not supported yet + switch { + case t.Chunked: + if isResponse && (noResponseBodyExpected(t.RequestMethod) || !bodyAllowedForStatus(t.StatusCode)) { + t.Body = NoBody + } else { + t.Body = &body{src: internal.NewChunkedReader(r), hdr: msg, r: r, closing: t.Close} + } + case realLength == 0: + t.Body = NoBody + case realLength > 0: + t.Body = &body{src: io.LimitReader(r, realLength), closing: t.Close} + default: + // realLength < 0, i.e. "Content-Length" not mentioned in header + if t.Close { + // Close semantics (i.e. HTTP/1.0) + t.Body = &body{src: r, closing: t.Close} + } else { + // Persistent connection (i.e. HTTP/1.1) + t.Body = NoBody + } + } + + // Unify output + switch rr := msg.(type) { + case *Request: + rr.Body = t.Body + rr.ContentLength = t.ContentLength + if t.Chunked { + rr.TransferEncoding = []string{"chunked"} + } + rr.Close = t.Close + rr.Trailer = t.Trailer + case *Response: + rr.Body = t.Body + rr.ContentLength = t.ContentLength + if t.Chunked { + rr.TransferEncoding = []string{"chunked"} + } + rr.Close = t.Close + rr.Trailer = t.Trailer + } + + return nil +} + +// Checks whether chunked is part of the encodings stack. +func chunked(te []string) bool { return len(te) > 0 && te[0] == "chunked" } + +// Checks whether the encoding is explicitly "identity". +func isIdentity(te []string) bool { return len(te) == 1 && te[0] == "identity" } + +// unsupportedTEError reports unsupported transfer-encodings. +type unsupportedTEError struct { + err string +} + +func (uste *unsupportedTEError) Error() string { + return uste.err +} + +// isUnsupportedTEError checks if the error is of type +// unsupportedTEError. It is usually invoked with a non-nil err. +func isUnsupportedTEError(err error) bool { + _, ok := err.(*unsupportedTEError) + return ok +} + +// parseTransferEncoding sets t.Chunked based on the Transfer-Encoding header. +func (t *transferReader) parseTransferEncoding() error { + raw, present := t.Header["Transfer-Encoding"] + if !present { + return nil + } + delete(t.Header, "Transfer-Encoding") + + // Issue 12785; ignore Transfer-Encoding on HTTP/1.0 requests. + if !t.protoAtLeast(1, 1) { + return nil + } + + // Like nginx, we only support a single Transfer-Encoding header field, and + // only if set to "chunked". This is one of the most security sensitive + // surfaces in HTTP/1.1 due to the risk of request smuggling, so we keep it + // strict and simple. + if len(raw) != 1 { + return &unsupportedTEError{fmt.Sprintf("too many transfer encodings: %q", raw)} + } + if !ascii.EqualFold(raw[0], "chunked") { + return &unsupportedTEError{fmt.Sprintf("unsupported transfer encoding: %q", raw[0])} + } + + t.Chunked = true + return nil +} + +// Determine the expected body length, using RFC 7230 Section 3.3. This +// function is not a method, because ultimately it should be shared by +// ReadResponse and ReadRequest. +func fixLength(isResponse bool, status int, requestMethod string, header Header, chunked bool) (n int64, err error) { + isRequest := !isResponse + contentLens := header["Content-Length"] + + // Hardening against HTTP request smuggling + if len(contentLens) > 1 { + // Per RFC 7230 Section 3.3.2, prevent multiple + // Content-Length headers if they differ in value. + // If there are dups of the value, remove the dups. + // See Issue 16490. + first := textproto.TrimString(contentLens[0]) + for _, ct := range contentLens[1:] { + if first != textproto.TrimString(ct) { + return 0, fmt.Errorf("http: message cannot contain multiple Content-Length headers; got %q", contentLens) + } + } + + // deduplicate Content-Length + header.Del("Content-Length") + header.Add("Content-Length", first) + + contentLens = header["Content-Length"] + } + + // Reject requests with invalid Content-Length headers. + if len(contentLens) > 0 { + n, err = parseContentLength(contentLens) + if err != nil { + return -1, err + } + } + + // Logic based on response type or status + if isResponse && noResponseBodyExpected(requestMethod) { + return 0, nil + } + if status/100 == 1 { + return 0, nil + } + switch status { + case 204, 304: + return 0, nil + } + + // According to RFC 9112, "If a message is received with both a + // Transfer-Encoding and a Content-Length header field, the Transfer-Encoding + // overrides the Content-Length. Such a message might indicate an attempt to + // perform request smuggling (Section 11.2) or response splitting (Section 11.1) + // and ought to be handled as an error. An intermediary that chooses to forward + // the message MUST first remove the received Content-Length field and process + // the Transfer-Encoding (as described below) prior to forwarding the message downstream." + // + // Chunked-encoding requests with either valid Content-Length + // headers or no Content-Length headers are accepted after removing + // the Content-Length field from header. + // + // Logic based on Transfer-Encoding + if chunked { + header.Del("Content-Length") + return -1, nil + } + + // Logic based on Content-Length + if len(contentLens) > 0 { + return n, nil + } + + header.Del("Content-Length") + + if isRequest { + // RFC 7230 neither explicitly permits nor forbids an + // entity-body on a GET request so we permit one if + // declared, but we default to 0 here (not -1 below) + // if there's no mention of a body. + // Likewise, all other request methods are assumed to have + // no body if neither Transfer-Encoding chunked nor a + // Content-Length are set. + return 0, nil + } + + // Body-EOF logic based on other methods (like closing, or chunked coding) + return -1, nil +} + +// Determine whether to hang up after sending a request and body, or +// receiving a response and body +// 'header' is the request headers. +func shouldClose(major, minor int, header Header, removeCloseHeader bool) bool { + if major < 1 { + return true + } + + conv := header["Connection"] + hasClose := httpguts.HeaderValuesContainsToken(conv, "close") + if major == 1 && minor == 0 { + return hasClose || !httpguts.HeaderValuesContainsToken(conv, "keep-alive") + } + + if hasClose && removeCloseHeader { + header.Del("Connection") + } + + return hasClose +} + +// Parse the trailer header. +func fixTrailer(header Header, chunked bool) (Header, error) { + vv, ok := header["Trailer"] + if !ok { + return nil, nil + } + if !chunked { + // Trailer and no chunking: + // this is an invalid use case for trailer header. + // Nevertheless, no error will be returned and we + // let users decide if this is a valid HTTP message. + // The Trailer header will be kept in Response.Header + // but not populate Response.Trailer. + // See issue #27197. + return nil, nil + } + header.Del("Trailer") + + trailer := make(Header) + var err error + for _, v := range vv { + foreachHeaderElement(v, func(key string) { + key = CanonicalHeaderKey(key) + switch key { + case "Transfer-Encoding", "Trailer", "Content-Length": + if err == nil { + err = badStringError("bad trailer key", key) + return + } + } + trailer[key] = nil + }) + } + if err != nil { + return nil, err + } + if len(trailer) == 0 { + return nil, nil + } + return trailer, nil +} + +// body turns a Reader into a ReadCloser. +// Close ensures that the body has been fully read +// and then reads the trailer if necessary. +type body struct { + src io.Reader + hdr any // non-nil (Response or Request) value means read trailer + r *bufio.Reader // underlying wire-format reader for the trailer + closing bool // is the connection to be closed after reading body? + doEarlyClose bool // whether Close should stop early + + mu sync.Mutex // guards following, and calls to Read and Close + sawEOF bool + closed bool + earlyClose bool // Close called and we didn't read to the end of src + onHitEOF func() // if non-nil, func to call when EOF is Read +} + +// ErrBodyReadAfterClose is returned when reading a [Request] or [Response] +// Body after the body has been closed. This typically happens when the body is +// read after an HTTP [Handler] calls WriteHeader or Write on its +// [ResponseWriter]. +var ErrBodyReadAfterClose = errors.New("http: invalid Read on closed Body") + +func (b *body) Read(p []byte) (n int, err error) { + b.mu.Lock() + defer b.mu.Unlock() + if b.closed { + return 0, ErrBodyReadAfterClose + } + return b.readLocked(p) +} + +// Must hold b.mu. +func (b *body) readLocked(p []byte) (n int, err error) { + if b.sawEOF { + return 0, io.EOF + } + n, err = b.src.Read(p) + + if err == io.EOF { + b.sawEOF = true + // Chunked case. Read the trailer. + if b.hdr != nil { + if e := b.readTrailer(); e != nil { + err = e + // Something went wrong in the trailer, we must not allow any + // further reads of any kind to succeed from body, nor any + // subsequent requests on the server connection. See + // golang.org/issue/12027 + b.sawEOF = false + b.closed = true + } + b.hdr = nil + } else { + // If the server declared the Content-Length, our body is a LimitedReader + // and we need to check whether this EOF arrived early. + if lr, ok := b.src.(*io.LimitedReader); ok && lr.N > 0 { + err = io.ErrUnexpectedEOF + } + } + } + + // If we can return an EOF here along with the read data, do + // so. This is optional per the io.Reader contract, but doing + // so helps the HTTP transport code recycle its connection + // earlier (since it will see this EOF itself), even if the + // client doesn't do future reads or Close. + if err == nil && n > 0 { + if lr, ok := b.src.(*io.LimitedReader); ok && lr.N == 0 { + err = io.EOF + b.sawEOF = true + } + } + + if b.sawEOF && b.onHitEOF != nil { + b.onHitEOF() + } + + return n, err +} + +var ( + singleCRLF = []byte("\r\n") + doubleCRLF = []byte("\r\n\r\n") +) + +func seeUpcomingDoubleCRLF(r *bufio.Reader) bool { + for peekSize := 4; ; peekSize++ { + // This loop stops when Peek returns an error, + // which it does when r's buffer has been filled. + buf, err := r.Peek(peekSize) + if bytes.HasSuffix(buf, doubleCRLF) { + return true + } + if err != nil { + break + } + } + return false +} + +var errTrailerEOF = errors.New("http: unexpected EOF reading trailer") + +func (b *body) readTrailer() error { + // The common case, since nobody uses trailers. + buf, err := b.r.Peek(2) + if bytes.Equal(buf, singleCRLF) { + b.r.Discard(2) + return nil + } + if len(buf) < 2 { + return errTrailerEOF + } + if err != nil { + return err + } + + // Make sure there's a header terminator coming up, to prevent + // a DoS with an unbounded size Trailer. It's not easy to + // slip in a LimitReader here, as textproto.NewReader requires + // a concrete *bufio.Reader. Also, we can't get all the way + // back up to our conn's LimitedReader that *might* be backing + // this bufio.Reader. Instead, a hack: we iteratively Peek up + // to the bufio.Reader's max size, looking for a double CRLF. + // This limits the trailer to the underlying buffer size, typically 4kB. + if !seeUpcomingDoubleCRLF(b.r) { + return errors.New("http: suspiciously long trailer after chunked body") + } + + hdr, err := textproto.NewReader(b.r).ReadMIMEHeader() + if err != nil { + if err == io.EOF { + return errTrailerEOF + } + return err + } + switch rr := b.hdr.(type) { + case *Request: + mergeSetHeader(&rr.Trailer, Header(hdr)) + case *Response: + mergeSetHeader(&rr.Trailer, Header(hdr)) + } + return nil +} + +func mergeSetHeader(dst *Header, src Header) { + if *dst == nil { + *dst = src + return + } + maps.Copy(*dst, src) +} + +// unreadDataSizeLocked returns the number of bytes of unread input. +// It returns -1 if unknown. +// b.mu must be held. +func (b *body) unreadDataSizeLocked() int64 { + if lr, ok := b.src.(*io.LimitedReader); ok { + return lr.N + } + return -1 +} + +func (b *body) Close() error { + b.mu.Lock() + defer b.mu.Unlock() + if b.closed { + return nil + } + var err error + switch { + case b.sawEOF: + // Already saw EOF, so no need going to look for it. + case b.hdr == nil && b.closing: + // no trailer and closing the connection next. + // no point in reading to EOF. + case b.doEarlyClose: + // Read up to maxPostHandlerReadBytes bytes of the body, looking + // for EOF (and trailers), so we can re-use this connection. + if lr, ok := b.src.(*io.LimitedReader); ok && lr.N > maxPostHandlerReadBytes { + // There was a declared Content-Length, and we have more bytes remaining + // than our maxPostHandlerReadBytes tolerance. So, give up. + b.earlyClose = true + } else { + var n int64 + // Consume the body, or, which will also lead to us reading + // the trailer headers after the body, if present. + n, err = io.CopyN(io.Discard, bodyLocked{b}, maxPostHandlerReadBytes) + if err == io.EOF { + err = nil + } + if n == maxPostHandlerReadBytes { + b.earlyClose = true + } + } + default: + // Fully consume the body, which will also lead to us reading + // the trailer headers after the body, if present. + _, err = io.Copy(io.Discard, bodyLocked{b}) + } + b.closed = true + return err +} + +func (b *body) didEarlyClose() bool { + b.mu.Lock() + defer b.mu.Unlock() + return b.earlyClose +} + +// bodyRemains reports whether future Read calls might +// yield data. +func (b *body) bodyRemains() bool { + b.mu.Lock() + defer b.mu.Unlock() + return !b.sawEOF +} + +func (b *body) registerOnHitEOF(fn func()) { + b.mu.Lock() + defer b.mu.Unlock() + b.onHitEOF = fn +} + +// bodyLocked is an io.Reader reading from a *body when its mutex is +// already held. +type bodyLocked struct { + b *body +} + +func (bl bodyLocked) Read(p []byte) (n int, err error) { + if bl.b.closed { + return 0, ErrBodyReadAfterClose + } + return bl.b.readLocked(p) +} + +// parseContentLength checks that the header is valid and then trims +// whitespace. It returns -1 if no value is set otherwise the value +// if it's >= 0. +func parseContentLength(clHeaders []string) (int64, error) { + if len(clHeaders) == 0 { + return -1, nil + } + cl := textproto.TrimString(clHeaders[0]) + + // The Content-Length must be a valid numeric value. + // See: https://datatracker.ietf.org/doc/html/rfc2616/#section-14.13 + if cl == "" { + return 0, badStringError("invalid empty Content-Length", cl) + } + n, err := strconv.ParseUint(cl, 10, 63) + if err != nil { + return 0, badStringError("bad Content-Length", cl) + } + return int64(n), nil +} + +// finishAsyncByteRead finishes reading the 1-byte sniff +// from the ContentLength==0, Body!=nil case. +type finishAsyncByteRead struct { + tw *transferWriter +} + +func (fr finishAsyncByteRead) Read(p []byte) (n int, err error) { + if len(p) == 0 { + return + } + rres := <-fr.tw.ByteReadCh + n, err = rres.n, rres.err + if n == 1 { + p[0] = rres.b + } + if err == nil { + err = io.EOF + } + return +} + +var nopCloserType = reflect.TypeOf(io.NopCloser(nil)) +var nopCloserWriterToType = reflect.TypeOf(io.NopCloser(struct { + io.Reader + io.WriterTo +}{})) + +// unwrapNopCloser return the underlying reader and true if r is a NopCloser +// else it return false. +func unwrapNopCloser(r io.Reader) (underlyingReader io.Reader, isNopCloser bool) { + switch reflect.TypeOf(r) { + case nopCloserType, nopCloserWriterToType: + return reflect.ValueOf(r).Field(0).Interface().(io.Reader), true + default: + return nil, false + } +} + +// isKnownInMemoryReader reports whether r is a type known to not +// block on Read. Its caller uses this as an optional optimization to +// send fewer TCP packets. +func isKnownInMemoryReader(r io.Reader) bool { + switch r.(type) { + case *bytes.Reader, *bytes.Buffer, *strings.Reader: + return true + } + if r, ok := unwrapNopCloser(r); ok { + return isKnownInMemoryReader(r) + } + if r, ok := r.(*readTrackingBody); ok { + return isKnownInMemoryReader(r.ReadCloser) + } + return false +} + +// bufioFlushWriter is an io.Writer wrapper that flushes all writes +// on its wrapped writer if it's a *bufio.Writer. +type bufioFlushWriter struct{ w io.Writer } + +func (fw bufioFlushWriter) Write(p []byte) (n int, err error) { + n, err = fw.w.Write(p) + if bw, ok := fw.w.(*bufio.Writer); n > 0 && ok { + ferr := bw.Flush() + if ferr != nil && err == nil { + err = ferr + } + } + return +} diff --git a/backend/vendor/github.com/enetx/http/transport.go b/backend/vendor/github.com/enetx/http/transport.go new file mode 100644 index 0000000..fea43b9 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/transport.go @@ -0,0 +1,3133 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// HTTP client implementation. See RFC 7230 through 7235. +// +// This is the low-level Transport implementation of RoundTripper. +// The high-level interface is in client.go. + +package http + +import ( + "bufio" + "compress/gzip" + "container/list" + "context" + "crypto/tls" + "errors" + "fmt" + "io" + "log" + "maps" + "net" + "net/textproto" + "net/url" + "reflect" + "strings" + "sync" + "sync/atomic" + "time" + "os" + _ "unsafe" + + "github.com/enetx/http/httptrace" + "github.com/enetx/http/internal/ascii" + + "golang.org/x/net/http/httpguts" + "golang.org/x/net/http/httpproxy" +) + +// DefaultTransport is the default implementation of [Transport] and is +// used by [DefaultClient]. It establishes network connections as needed +// and caches them for reuse by subsequent calls. It uses HTTP proxies +// as directed by the environment variables HTTP_PROXY, HTTPS_PROXY +// and NO_PROXY (or the lowercase versions thereof). +var DefaultTransport RoundTripper = &Transport{ + Proxy: ProxyFromEnvironment, + DialContext: defaultTransportDialContext(&net.Dialer{ + Timeout: 30 * time.Second, + KeepAlive: 30 * time.Second, + }), + ForceAttemptHTTP2: true, + MaxIdleConns: 100, + IdleConnTimeout: 90 * time.Second, + TLSHandshakeTimeout: 10 * time.Second, + ExpectContinueTimeout: 1 * time.Second, +} + +// DefaultMaxIdleConnsPerHost is the default value of [Transport]'s +// MaxIdleConnsPerHost. +const DefaultMaxIdleConnsPerHost = 2 + +// Transport is an implementation of [RoundTripper] that supports HTTP, +// HTTPS, and HTTP proxies (for either HTTP or HTTPS with CONNECT). +// +// By default, Transport caches connections for future re-use. +// This may leave many open connections when accessing many hosts. +// This behavior can be managed using [Transport.CloseIdleConnections] method +// and the [Transport.MaxIdleConnsPerHost] and [Transport.DisableKeepAlives] fields. +// +// Transports should be reused instead of created as needed. +// Transports are safe for concurrent use by multiple goroutines. +// +// A Transport is a low-level primitive for making HTTP and HTTPS requests. +// For high-level functionality, such as cookies and redirects, see [Client]. +// +// Transport uses HTTP/1.1 for HTTP URLs and either HTTP/1.1 or HTTP/2 +// for HTTPS URLs, depending on whether the server supports HTTP/2, +// and how the Transport is configured. The [DefaultTransport] supports HTTP/2. +// To explicitly enable HTTP/2 on a transport, set [Transport.Protocols]. +// +// Responses with status codes in the 1xx range are either handled +// automatically (100 expect-continue) or ignored. The one +// exception is HTTP status code 101 (Switching Protocols), which is +// considered a terminal status and returned by [Transport.RoundTrip]. To see the +// ignored 1xx responses, use the httptrace trace package's +// ClientTrace.Got1xxResponse. +// +// Transport only retries a request upon encountering a network error +// if the connection has been already been used successfully and if the +// request is idempotent and either has no body or has its [Request.GetBody] +// defined. HTTP requests are considered idempotent if they have HTTP methods +// GET, HEAD, OPTIONS, or TRACE; or if their [Header] map contains an +// "Idempotency-Key" or "X-Idempotency-Key" entry. If the idempotency key +// value is a zero-length slice, the request is treated as idempotent but the +// header is not sent on the wire. +type Transport struct { + idleMu sync.Mutex + closeIdle bool // user has requested to close all idle conns + idleConn map[connectMethodKey][]*persistConn // most recently used at end + idleConnWait map[connectMethodKey]wantConnQueue // waiting getConns + idleLRU connLRU + + reqMu sync.Mutex + reqCanceler map[*Request]context.CancelCauseFunc + + altMu sync.Mutex // guards changing altProto only + altProto atomic.Value // of nil or map[string]RoundTripper, key is URI scheme + + connsPerHostMu sync.Mutex + connsPerHost map[connectMethodKey]int + connsPerHostWait map[connectMethodKey]wantConnQueue // waiting getConns + dialsInProgress wantConnQueue + + // Proxy specifies a function to return a proxy for a given + // Request. If the function returns a non-nil error, the + // request is aborted with the provided error. + // + // The proxy type is determined by the URL scheme. "http", + // "https", "socks5", and "socks5h" are supported. If the scheme is empty, + // "http" is assumed. + // "socks5" is treated the same as "socks5h". + // + // If the proxy URL contains a userinfo subcomponent, + // the proxy request will pass the username and password + // in a Proxy-Authorization header. + // + // If Proxy is nil or returns a nil *URL, no proxy is used. + Proxy func(*Request) (*url.URL, error) + + // OnProxyConnectResponse is called when the Transport gets an HTTP response from + // a proxy for a CONNECT request. It's called before the check for a 200 OK response. + // If it returns an error, the request fails with that error. + OnProxyConnectResponse func(ctx context.Context, proxyURL *url.URL, connectReq *Request, connectRes *Response) error + + // DialContext specifies the dial function for creating unencrypted TCP connections. + // If DialContext is nil (and the deprecated Dial below is also nil), + // then the transport dials using package net. + // + // DialContext runs concurrently with calls to RoundTrip. + // A RoundTrip call that initiates a dial may end up using + // a connection dialed previously when the earlier connection + // becomes idle before the later DialContext completes. + DialContext func(ctx context.Context, network, addr string) (net.Conn, error) + + // Dial specifies the dial function for creating unencrypted TCP connections. + // + // Dial runs concurrently with calls to RoundTrip. + // A RoundTrip call that initiates a dial may end up using + // a connection dialed previously when the earlier connection + // becomes idle before the later Dial completes. + // + // Deprecated: Use DialContext instead, which allows the transport + // to cancel dials as soon as they are no longer needed. + // If both are set, DialContext takes priority. + Dial func(network, addr string) (net.Conn, error) + + // DialTLSContext specifies an optional dial function for creating + // TLS connections for non-proxied HTTPS requests. + // + // If DialTLSContext is nil (and the deprecated DialTLS below is also nil), + // DialContext and TLSClientConfig are used. + // + // If DialTLSContext is set, the Dial and DialContext hooks are not used for HTTPS + // requests and the TLSClientConfig and TLSHandshakeTimeout + // are ignored. The returned net.Conn is assumed to already be + // past the TLS handshake. + DialTLSContext func(ctx context.Context, network, addr string) (net.Conn, error) + + // DialTLS specifies an optional dial function for creating + // TLS connections for non-proxied HTTPS requests. + // + // Deprecated: Use DialTLSContext instead, which allows the transport + // to cancel dials as soon as they are no longer needed. + // If both are set, DialTLSContext takes priority. + DialTLS func(network, addr string) (net.Conn, error) + + // TLSClientConfig specifies the TLS configuration to use with + // tls.Client. + // If nil, the default configuration is used. + // If non-nil, HTTP/2 support may not be enabled by default. + TLSClientConfig *tls.Config + + // TLSHandshakeTimeout specifies the maximum amount of time to + // wait for a TLS handshake. Zero means no timeout. + TLSHandshakeTimeout time.Duration + + // DisableKeepAlives, if true, disables HTTP keep-alives and + // will only use the connection to the server for a single + // HTTP request. + // + // This is unrelated to the similarly named TCP keep-alives. + DisableKeepAlives bool + + // DisableCompression, if true, prevents the Transport from + // requesting compression with an "Accept-Encoding: gzip" + // request header when the Request contains no existing + // Accept-Encoding value. If the Transport requests gzip on + // its own and gets a gzipped response, it's transparently + // decoded in the Response.Body. However, if the user + // explicitly requested gzip it is not automatically + // uncompressed. + DisableCompression bool + + // MaxIdleConns controls the maximum number of idle (keep-alive) + // connections across all hosts. Zero means no limit. + MaxIdleConns int + + // MaxIdleConnsPerHost, if non-zero, controls the maximum idle + // (keep-alive) connections to keep per-host. If zero, + // DefaultMaxIdleConnsPerHost is used. + MaxIdleConnsPerHost int + + // MaxConnsPerHost optionally limits the total number of + // connections per host, including connections in the dialing, + // active, and idle states. On limit violation, dials will block. + // + // Zero means no limit. + MaxConnsPerHost int + + // IdleConnTimeout is the maximum amount of time an idle + // (keep-alive) connection will remain idle before closing + // itself. + // Zero means no limit. + IdleConnTimeout time.Duration + + // ResponseHeaderTimeout, if non-zero, specifies the amount of + // time to wait for a server's response headers after fully + // writing the request (including its body, if any). This + // time does not include the time to read the response body. + ResponseHeaderTimeout time.Duration + + // ExpectContinueTimeout, if non-zero, specifies the amount of + // time to wait for a server's first response headers after fully + // writing the request headers if the request has an + // "Expect: 100-continue" header. Zero means no timeout and + // causes the body to be sent immediately, without + // waiting for the server to approve. + // This time does not include the time to send the request header. + ExpectContinueTimeout time.Duration + + // TLSNextProto specifies how the Transport switches to an + // alternate protocol (such as HTTP/2) after a TLS ALPN + // protocol negotiation. If Transport dials a TLS connection + // with a non-empty protocol name and TLSNextProto contains a + // map entry for that key (such as "h2"), then the func is + // called with the request's authority (such as "example.com" + // or "example.com:1234") and the TLS connection. The function + // must return a RoundTripper that then handles the request. + // If TLSNextProto is not nil, HTTP/2 support is not enabled + // automatically. + TLSNextProto map[string]func(authority string, c *tls.Conn) RoundTripper + + // ProxyConnectHeader optionally specifies headers to send to + // proxies during CONNECT requests. + // To set the header dynamically, see GetProxyConnectHeader. + ProxyConnectHeader Header + + // GetProxyConnectHeader optionally specifies a func to return + // headers to send to proxyURL during a CONNECT request to the + // ip:port target. + // If it returns an error, the Transport's RoundTrip fails with + // that error. It can return (nil, nil) to not add headers. + // If GetProxyConnectHeader is non-nil, ProxyConnectHeader is + // ignored. + GetProxyConnectHeader func(ctx context.Context, proxyURL *url.URL, target string) (Header, error) + + // MaxResponseHeaderBytes specifies a limit on how many + // response bytes are allowed in the server's response + // header. + // + // Zero means to use a default limit. + MaxResponseHeaderBytes int64 + + // WriteBufferSize specifies the size of the write buffer used + // when writing to the transport. + // If zero, a default (currently 4KB) is used. + WriteBufferSize int + + // ReadBufferSize specifies the size of the read buffer used + // when reading from the transport. + // If zero, a default (currently 4KB) is used. + ReadBufferSize int + + // nextProtoOnce guards initialization of TLSNextProto and + // h2transport (via onceSetNextProtoDefaults) + nextProtoOnce sync.Once + H2transport h2Transport // non-nil if http2 wired up + tlsNextProtoWasNil bool // whether TLSNextProto was nil when the Once fired + + // ForceAttemptHTTP2 controls whether HTTP/2 is enabled when a non-zero + // Dial, DialTLS, or DialContext func or TLSClientConfig is provided. + // By default, use of any those fields conservatively disables HTTP/2. + // To use a custom dialer or TLS config and still attempt HTTP/2 + // upgrades, set this to true. + ForceAttemptHTTP2 bool + + // HTTP2 configures HTTP/2 connections. + // + // This field does not yet have any effect. + // See https://go.dev/issue/67813. + HTTP2 *HTTP2Config + + // Protocols is the set of protocols supported by the transport. + // + // If Protocols includes UnencryptedHTTP2 and does not include HTTP1, + // the transport will use unencrypted HTTP/2 for requests for http:// URLs. + // + // If Protocols is nil, the default is usually HTTP/1 only. + // If ForceAttemptHTTP2 is true, or if TLSNextProto contains an "h2" entry, + // the default is HTTP/1 and HTTP/2. + Protocols *Protocols +} + +func (t *Transport) writeBufferSize() int { + if t.WriteBufferSize > 0 { + return t.WriteBufferSize + } + return 4 << 10 +} + +func (t *Transport) readBufferSize() int { + if t.ReadBufferSize > 0 { + return t.ReadBufferSize + } + return 4 << 10 +} + +// Clone returns a deep copy of t's exported fields. +func (t *Transport) Clone() *Transport { + t.nextProtoOnce.Do(t.onceSetNextProtoDefaults) + t2 := &Transport{ + Proxy: t.Proxy, + OnProxyConnectResponse: t.OnProxyConnectResponse, + DialContext: t.DialContext, + Dial: t.Dial, + DialTLS: t.DialTLS, + DialTLSContext: t.DialTLSContext, + TLSHandshakeTimeout: t.TLSHandshakeTimeout, + DisableKeepAlives: t.DisableKeepAlives, + DisableCompression: t.DisableCompression, + MaxIdleConns: t.MaxIdleConns, + MaxIdleConnsPerHost: t.MaxIdleConnsPerHost, + MaxConnsPerHost: t.MaxConnsPerHost, + IdleConnTimeout: t.IdleConnTimeout, + ResponseHeaderTimeout: t.ResponseHeaderTimeout, + ExpectContinueTimeout: t.ExpectContinueTimeout, + ProxyConnectHeader: t.ProxyConnectHeader.Clone(), + GetProxyConnectHeader: t.GetProxyConnectHeader, + MaxResponseHeaderBytes: t.MaxResponseHeaderBytes, + ForceAttemptHTTP2: t.ForceAttemptHTTP2, + WriteBufferSize: t.WriteBufferSize, + ReadBufferSize: t.ReadBufferSize, + } + if t.TLSClientConfig != nil { + t2.TLSClientConfig = t.TLSClientConfig.Clone() + } + if t.HTTP2 != nil { + t2.HTTP2 = &HTTP2Config{} + *t2.HTTP2 = *t.HTTP2 + } + if t.Protocols != nil { + t2.Protocols = &Protocols{} + *t2.Protocols = *t.Protocols + } + if !t.tlsNextProtoWasNil { + npm := maps.Clone(t.TLSNextProto) + if npm == nil { + npm = make(map[string]func(authority string, c *tls.Conn) RoundTripper) + } + t2.TLSNextProto = npm + } + return t2 +} + +// h2Transport is the interface we expect to be able to call from +// net/http against an *http2.Transport that's either bundled into +// h2_bundle.go or supplied by the user via x/net/http2. +// +// We name it with the "h2" prefix to stay out of the "http2" prefix +// namespace used by x/tools/cmd/bundle for h2_bundle.go. +type h2Transport interface { + CloseIdleConnections() +} + +func (t *Transport) hasCustomTLSDialer() bool { + return t.DialTLS != nil || t.DialTLSContext != nil +} + +// onceSetNextProtoDefaults initializes TLSNextProto. +// It must be called via t.nextProtoOnce.Do. +func (t *Transport) onceSetNextProtoDefaults() { + t.tlsNextProtoWasNil = (t.TLSNextProto == nil) + if strings.Contains(os.Getenv("GODEBUG"), "http2client=0") { + return + } + + // If they've already configured http2 with + // golang.org/x/net/http2 instead of the bundled copy, try to + // get at its http2.Transport value (via the "https" + // altproto map) so we can call CloseIdleConnections on it if + // requested. (Issue 22891) + altProto, _ := t.altProto.Load().(map[string]RoundTripper) + if rv := reflect.ValueOf(altProto["https"]); rv.IsValid() && rv.Type().Kind() == reflect.Struct && rv.Type().NumField() == 1 { + if v := rv.Field(0); v.CanInterface() { + if h2i, ok := v.Interface().(h2Transport); ok { + t.H2transport = h2i + return + } + } + } + + if _, ok := t.TLSNextProto["h2"]; ok { + // There's an existing HTTP/2 implementation installed. + return + } + protocols := t.protocols() + if !protocols.HTTP2() && !protocols.UnencryptedHTTP2() { + return + } + if omitBundledHTTP2 { + return + } + t2, err := http2configureTransports(t) + if err != nil { + log.Printf("Error enabling Transport HTTP/2 support: %v", err) + return + } + t.H2transport = t2 + + // Auto-configure the http2.Transport's MaxHeaderListSize from + // the http.Transport's MaxResponseHeaderBytes. They don't + // exactly mean the same thing, but they're close. + // + // TODO: also add this to x/net/http2.Configure Transport, behind + // a +build go1.7 build tag: + if limit1 := t.MaxResponseHeaderBytes; limit1 != 0 && t2.MaxHeaderListSize == 0 { + const h2max = 1<<32 - 1 + if limit1 >= h2max { + t2.MaxHeaderListSize = h2max + } else { + t2.MaxHeaderListSize = uint32(limit1) + } + } + + // Server.ServeTLS clones the tls.Config before modifying it. + // Transport doesn't. We may want to make the two consistent some day. + // + // http2configureTransport will have already set NextProtos, but adjust it again + // here to remove HTTP/1.1 if the user has disabled it. + t.TLSClientConfig.NextProtos = adjustNextProtos(t.TLSClientConfig.NextProtos, protocols) +} + +func (t *Transport) protocols() Protocols { + if t.Protocols != nil { + return *t.Protocols // user-configured set + } + var p Protocols + p.SetHTTP1(true) // default always includes HTTP/1 + switch { + case t.TLSNextProto != nil: + // Setting TLSNextProto to an empty map is a documented way + // to disable HTTP/2 on a Transport. + if t.TLSNextProto["h2"] != nil { + p.SetHTTP2(true) + } + case !t.ForceAttemptHTTP2 && (t.TLSClientConfig != nil || t.Dial != nil || t.DialContext != nil || t.hasCustomTLSDialer()): + // Be conservative and don't automatically enable + // http2 if they've specified a custom TLS config or + // custom dialers. Let them opt-in themselves via + // Transport.Protocols.SetHTTP2(true) so we don't surprise them + // by modifying their tls.Config. Issue 14275. + // However, if ForceAttemptHTTP2 is true, it overrides the above checks. + // case http2client.Value() == "0": + default: + p.SetHTTP2(true) + } + return p +} + +// ProxyFromEnvironment returns the URL of the proxy to use for a +// given request, as indicated by the environment variables +// HTTP_PROXY, HTTPS_PROXY and NO_PROXY (or the lowercase versions +// thereof). Requests use the proxy from the environment variable +// matching their scheme, unless excluded by NO_PROXY. +// +// The environment values may be either a complete URL or a +// "host[:port]", in which case the "http" scheme is assumed. +// An error is returned if the value is a different form. +// +// A nil URL and nil error are returned if no proxy is defined in the +// environment, or a proxy should not be used for the given request, +// as defined by NO_PROXY. +// +// As a special case, if req.URL.Host is "localhost" (with or without +// a port number), then a nil URL and nil error will be returned. +func ProxyFromEnvironment(req *Request) (*url.URL, error) { + return envProxyFunc()(req.URL) +} + +// ProxyURL returns a proxy function (for use in a [Transport]) +// that always returns the same URL. +func ProxyURL(fixedURL *url.URL) func(*Request) (*url.URL, error) { + return func(*Request) (*url.URL, error) { + return fixedURL, nil + } +} + +// transportRequest is a wrapper around a *Request that adds +// optional extra headers to write and stores any error to return +// from roundTrip. +type transportRequest struct { + *Request // original request, not to be mutated + extra Header // extra headers to write, or nil + trace *httptrace.ClientTrace // optional + + ctx context.Context // canceled when we are done with the request + cancel context.CancelCauseFunc + + mu sync.Mutex // guards err + err error // first setError value for mapRoundTripError to consider +} + +func (tr *transportRequest) extraHeaders() Header { + if tr.extra == nil { + tr.extra = make(Header) + } + return tr.extra +} + +func (tr *transportRequest) setError(err error) { + tr.mu.Lock() + if tr.err == nil { + tr.err = err + } + tr.mu.Unlock() +} + +// useRegisteredProtocol reports whether an alternate protocol (as registered +// with Transport.RegisterProtocol) should be respected for this request. +func (t *Transport) useRegisteredProtocol(req *Request) bool { + if req.URL.Scheme == "https" && req.requiresHTTP1() { + // If this request requires HTTP/1, don't use the + // "https" alternate protocol, which is used by the + // HTTP/2 code to take over requests if there's an + // existing cached HTTP/2 connection. + return false + } + return true +} + +// alternateRoundTripper returns the alternate RoundTripper to use +// for this request if the Request's URL scheme requires one, +// or nil for the normal case of using the Transport. +func (t *Transport) alternateRoundTripper(req *Request) RoundTripper { + if !t.useRegisteredProtocol(req) { + return nil + } + altProto, _ := t.altProto.Load().(map[string]RoundTripper) + return altProto[req.URL.Scheme] +} + +// roundTrip implements a RoundTripper over HTTP. +func (t *Transport) roundTrip(req *Request) (_ *Response, err error) { + t.nextProtoOnce.Do(t.onceSetNextProtoDefaults) + ctx := req.Context() + trace := httptrace.ContextClientTrace(ctx) + + if req.URL == nil { + req.closeBody() + return nil, errors.New("http: nil Request.URL") + } + if req.Header == nil { + req.closeBody() + return nil, errors.New("http: nil Request.Header") + } + scheme := req.URL.Scheme + isHTTP := scheme == "http" || scheme == "https" + if isHTTP { + for k, vv := range req.Header { + if !httpguts.ValidHeaderFieldName(k) { + + // Allow the HeaderOrderKey and PHeaderOrderKey magic string, this will be handled further. + if k == HeaderOrderKey || k == PHeaderOrderKey { + continue + } + + req.closeBody() + return nil, fmt.Errorf("net/http: invalid header field name %q", k) + } + for _, v := range vv { + if !httpguts.ValidHeaderFieldValue(v) { + req.closeBody() + // Don't include the value in the error, because it may be sensitive. + return nil, fmt.Errorf("net/http: invalid header field value for %q", k) + } + } + } + } + + origReq := req + req = setupRewindBody(req) + + if altRT := t.alternateRoundTripper(req); altRT != nil { + if resp, err := altRT.RoundTrip(req); err != ErrSkipAltProtocol { + return resp, err + } + var err error + req, err = rewindBody(req) + if err != nil { + return nil, err + } + } + if !isHTTP { + req.closeBody() + return nil, badStringError("unsupported protocol scheme", scheme) + } + if req.Method != "" && !validMethod(req.Method) { + req.closeBody() + return nil, fmt.Errorf("net/http: invalid method %q", req.Method) + } + if req.URL.Host == "" { + req.closeBody() + return nil, errors.New("http: no Host in request URL") + } + + // Transport request context. + // + // If RoundTrip returns an error, it cancels this context before returning. + // + // If RoundTrip returns no error: + // - For an HTTP/1 request, persistConn.readLoop cancels this context + // after reading the request body. + // - For an HTTP/2 request, RoundTrip cancels this context after the HTTP/2 + // RoundTripper returns. + ctx, cancel := context.WithCancelCause(req.Context()) + + // Convert Request.Cancel into context cancelation. + if origReq.Cancel != nil { + go awaitLegacyCancel(ctx, cancel, origReq) + } + + // Convert Transport.CancelRequest into context cancelation. + // + // This is lamentably expensive. CancelRequest has been deprecated for a long time + // and doesn't work on HTTP/2 requests. Perhaps we should drop support for it entirely. + cancel = t.prepareTransportCancel(origReq, cancel) + + defer func() { + if err != nil { + cancel(err) + } + }() + + for { + select { + case <-ctx.Done(): + req.closeBody() + return nil, context.Cause(ctx) + default: + } + + // treq gets modified by roundTrip, so we need to recreate for each retry. + treq := &transportRequest{Request: req, trace: trace, ctx: ctx, cancel: cancel} + cm, err := t.connectMethodForRequest(treq) + if err != nil { + req.closeBody() + return nil, err + } + + // Get the cached or newly-created connection to either the + // host (for http or https), the http proxy, or the http proxy + // pre-CONNECTed to https server. In any case, we'll be ready + // to send it requests. + pconn, err := t.getConn(treq, cm) + if err != nil { + req.closeBody() + return nil, err + } + + var resp *Response + if pconn.alt != nil { + // HTTP/2 path. + resp, err = pconn.alt.RoundTrip(req) + } else { + resp, err = pconn.roundTrip(treq) + } + if err == nil { + if pconn.alt != nil { + // HTTP/2 requests are not cancelable with CancelRequest, + // so we have no further need for the request context. + // + // On the HTTP/1 path, roundTrip takes responsibility for + // canceling the context after the response body is read. + cancel(errRequestDone) + } + resp.Request = origReq + return resp, nil + } + + // Failed. Clean up and determine whether to retry. + if http2isNoCachedConnError(err) { + if t.removeIdleConn(pconn) { + t.decConnsPerHost(pconn.cacheKey) + } + } else if !pconn.shouldRetryRequest(req, err) { + // Issue 16465: return underlying net.Conn.Read error from peek, + // as we've historically done. + if e, ok := err.(nothingWrittenError); ok { + err = e.error + } + if e, ok := err.(transportReadFromServerError); ok { + err = e.err + } + if b, ok := req.Body.(*readTrackingBody); ok && !b.didClose { + // Issue 49621: Close the request body if pconn.roundTrip + // didn't do so already. This can happen if the pconn + // write loop exits without reading the write request. + req.closeBody() + } + return nil, err + } + testHookRoundTripRetried() + + // Rewind the body if we're able to. + req, err = rewindBody(req) + if err != nil { + return nil, err + } + } +} + +func awaitLegacyCancel(ctx context.Context, cancel context.CancelCauseFunc, req *Request) { + select { + case <-req.Cancel: + cancel(errRequestCanceled) + case <-ctx.Done(): + } +} + +var errCannotRewind = errors.New("net/http: cannot rewind body after connection loss") + +type readTrackingBody struct { + io.ReadCloser + didRead bool + didClose bool +} + +func (r *readTrackingBody) Read(data []byte) (int, error) { + r.didRead = true + return r.ReadCloser.Read(data) +} + +func (r *readTrackingBody) Close() error { + r.didClose = true + return r.ReadCloser.Close() +} + +// setupRewindBody returns a new request with a custom body wrapper +// that can report whether the body needs rewinding. +// This lets rewindBody avoid an error result when the request +// does not have GetBody but the body hasn't been read at all yet. +func setupRewindBody(req *Request) *Request { + if req.Body == nil || req.Body == NoBody { + return req + } + newReq := *req + newReq.Body = &readTrackingBody{ReadCloser: req.Body} + return &newReq +} + +// rewindBody returns a new request with the body rewound. +// It returns req unmodified if the body does not need rewinding. +// rewindBody takes care of closing req.Body when appropriate +// (in all cases except when rewindBody returns req unmodified). +func rewindBody(req *Request) (rewound *Request, err error) { + if req.Body == nil || req.Body == NoBody || (!req.Body.(*readTrackingBody).didRead && !req.Body.(*readTrackingBody).didClose) { + return req, nil // nothing to rewind + } + if !req.Body.(*readTrackingBody).didClose { + req.closeBody() + } + if req.GetBody == nil { + return nil, errCannotRewind + } + body, err := req.GetBody() + if err != nil { + return nil, err + } + newReq := *req + newReq.Body = &readTrackingBody{ReadCloser: body} + return &newReq, nil +} + +// shouldRetryRequest reports whether we should retry sending a failed +// HTTP request on a new connection. The non-nil input error is the +// error from roundTrip. +func (pc *persistConn) shouldRetryRequest(req *Request, err error) bool { + if http2isNoCachedConnError(err) { + // Issue 16582: if the user started a bunch of + // requests at once, they can all pick the same conn + // and violate the server's max concurrent streams. + // Instead, match the HTTP/1 behavior for now and dial + // again to get a new TCP connection, rather than failing + // this request. + return true + } + if err == errMissingHost { + // User error. + return false + } + if !pc.isReused() { + // This was a fresh connection. There's no reason the server + // should've hung up on us. + // + // Also, if we retried now, we could loop forever + // creating new connections and retrying if the server + // is just hanging up on us because it doesn't like + // our request (as opposed to sending an error). + return false + } + if _, ok := err.(nothingWrittenError); ok { + // We never wrote anything, so it's safe to retry, if there's no body or we + // can "rewind" the body with GetBody. + return req.outgoingLength() == 0 || req.GetBody != nil + } + if !req.isReplayable() { + // Don't retry non-idempotent requests. + return false + } + if _, ok := err.(transportReadFromServerError); ok { + // We got some non-EOF net.Conn.Read failure reading + // the 1st response byte from the server. + return true + } + if err == errServerClosedIdle { + // The server replied with io.EOF while we were trying to + // read the response. Probably an unfortunately keep-alive + // timeout, just as the client was writing a request. + return true + } + return false // conservatively +} + +// ErrSkipAltProtocol is a sentinel error value defined by Transport.RegisterProtocol. +var ErrSkipAltProtocol = errors.New("net/http: skip alternate protocol") + +// RegisterProtocol registers a new protocol with scheme. +// The [Transport] will pass requests using the given scheme to rt. +// It is rt's responsibility to simulate HTTP request semantics. +// +// RegisterProtocol can be used by other packages to provide +// implementations of protocol schemes like "ftp" or "file". +// +// If rt.RoundTrip returns [ErrSkipAltProtocol], the Transport will +// handle the [Transport.RoundTrip] itself for that one request, as if the +// protocol were not registered. +func (t *Transport) RegisterProtocol(scheme string, rt RoundTripper) { + t.altMu.Lock() + defer t.altMu.Unlock() + oldMap, _ := t.altProto.Load().(map[string]RoundTripper) + if _, exists := oldMap[scheme]; exists { + panic("protocol " + scheme + " already registered") + } + newMap := maps.Clone(oldMap) + if newMap == nil { + newMap = make(map[string]RoundTripper) + } + newMap[scheme] = rt + t.altProto.Store(newMap) +} + +// CloseIdleConnections closes any connections which were previously +// connected from previous requests but are now sitting idle in +// a "keep-alive" state. It does not interrupt any connections currently +// in use. +func (t *Transport) CloseIdleConnections() { + t.nextProtoOnce.Do(t.onceSetNextProtoDefaults) + t.idleMu.Lock() + m := t.idleConn + t.idleConn = nil + t.closeIdle = true // close newly idle connections + t.idleLRU = connLRU{} + t.idleMu.Unlock() + for _, conns := range m { + for _, pconn := range conns { + pconn.close(errCloseIdleConns) + } + } + t.connsPerHostMu.Lock() + t.dialsInProgress.all(func(w *wantConn) { + if w.cancelCtx != nil && !w.waiting() { + w.cancelCtx() + } + }) + t.connsPerHostMu.Unlock() + if t2 := t.H2transport; t2 != nil { + t2.CloseIdleConnections() + } +} + +// prepareTransportCancel sets up state to convert Transport.CancelRequest into context cancelation. +func (t *Transport) prepareTransportCancel(req *Request, origCancel context.CancelCauseFunc) context.CancelCauseFunc { + // Historically, RoundTrip has not modified the Request in any way. + // We could avoid the need to keep a map of all in-flight requests by adding + // a field to the Request containing its cancel func, and setting that field + // while the request is in-flight. Callers aren't supposed to reuse a Request + // until after the response body is closed, so this wouldn't violate any + // concurrency guarantees. + cancel := func(err error) { + origCancel(err) + t.reqMu.Lock() + delete(t.reqCanceler, req) + t.reqMu.Unlock() + } + t.reqMu.Lock() + if t.reqCanceler == nil { + t.reqCanceler = make(map[*Request]context.CancelCauseFunc) + } + t.reqCanceler[req] = cancel + t.reqMu.Unlock() + return cancel +} + +// CancelRequest cancels an in-flight request by closing its connection. +// CancelRequest should only be called after [Transport.RoundTrip] has returned. +// +// Deprecated: Use [Request.WithContext] to create a request with a +// cancelable context instead. CancelRequest cannot cancel HTTP/2 +// requests. This may become a no-op in a future release of Go. +func (t *Transport) CancelRequest(req *Request) { + t.reqMu.Lock() + cancel := t.reqCanceler[req] + t.reqMu.Unlock() + if cancel != nil { + cancel(errRequestCanceled) + } +} + +// +// Private implementation past this point. +// + +var ( + envProxyOnce sync.Once + envProxyFuncValue func(*url.URL) (*url.URL, error) +) + +// envProxyFunc returns a function that reads the +// environment variable to determine the proxy address. +func envProxyFunc() func(*url.URL) (*url.URL, error) { + envProxyOnce.Do(func() { + envProxyFuncValue = httpproxy.FromEnvironment().ProxyFunc() + }) + return envProxyFuncValue +} + +// resetProxyConfig is used by tests. +func resetProxyConfig() { + envProxyOnce = sync.Once{} + envProxyFuncValue = nil +} + +func (t *Transport) connectMethodForRequest(treq *transportRequest) (cm connectMethod, err error) { + cm.targetScheme = treq.URL.Scheme + cm.targetAddr = canonicalAddr(treq.URL) + if t.Proxy != nil { + cm.proxyURL, err = t.Proxy(treq.Request) + } + cm.onlyH1 = treq.requiresHTTP1() + return cm, err +} + +// proxyAuth returns the Proxy-Authorization header to set +// on requests, if applicable. +func (cm *connectMethod) proxyAuth() string { + if cm.proxyURL == nil { + return "" + } + if u := cm.proxyURL.User; u != nil { + username := u.Username() + password, _ := u.Password() + return "Basic " + basicAuth(username, password) + } + return "" +} + +// error values for debugging and testing, not seen by users. +var ( + errKeepAlivesDisabled = errors.New("http: putIdleConn: keep alives disabled") + errConnBroken = errors.New("http: putIdleConn: connection is in bad state") + errCloseIdle = errors.New("http: putIdleConn: CloseIdleConnections was called") + errTooManyIdle = errors.New("http: putIdleConn: too many idle connections") + errTooManyIdleHost = errors.New("http: putIdleConn: too many idle connections for host") + errCloseIdleConns = errors.New("http: CloseIdleConnections called") + errReadLoopExiting = errors.New("http: persistConn.readLoop exiting") + errIdleConnTimeout = errors.New("http: idle connection timeout") + + // errServerClosedIdle is not seen by users for idempotent requests, but may be + // seen by a user if the server shuts down an idle connection and sends its FIN + // in flight with already-written POST body bytes from the client. + // See https://github.com/golang/go/issues/19943#issuecomment-355607646 + errServerClosedIdle = errors.New("http: server closed idle connection") +) + +// transportReadFromServerError is used by Transport.readLoop when the +// 1 byte peek read fails and we're actually anticipating a response. +// Usually this is just due to the inherent keep-alive shut down race, +// where the server closed the connection at the same time the client +// wrote. The underlying err field is usually io.EOF or some +// ECONNRESET sort of thing which varies by platform. But it might be +// the user's custom net.Conn.Read error too, so we carry it along for +// them to return from Transport.RoundTrip. +type transportReadFromServerError struct { + err error +} + +func (e transportReadFromServerError) Unwrap() error { return e.err } + +func (e transportReadFromServerError) Error() string { + return fmt.Sprintf("net/http: Transport failed to read from server: %v", e.err) +} + +func (t *Transport) putOrCloseIdleConn(pconn *persistConn) { + if err := t.tryPutIdleConn(pconn); err != nil { + pconn.close(err) + } +} + +func (t *Transport) maxIdleConnsPerHost() int { + if v := t.MaxIdleConnsPerHost; v != 0 { + return v + } + return DefaultMaxIdleConnsPerHost +} + +// tryPutIdleConn adds pconn to the list of idle persistent connections awaiting +// a new request. +// If pconn is no longer needed or not in a good state, tryPutIdleConn returns +// an error explaining why it wasn't registered. +// tryPutIdleConn does not close pconn. Use putOrCloseIdleConn instead for that. +func (t *Transport) tryPutIdleConn(pconn *persistConn) error { + if t.DisableKeepAlives || t.MaxIdleConnsPerHost < 0 { + return errKeepAlivesDisabled + } + if pconn.isBroken() { + return errConnBroken + } + pconn.markReused() + + t.idleMu.Lock() + defer t.idleMu.Unlock() + + // HTTP/2 (pconn.alt != nil) connections do not come out of the idle list, + // because multiple goroutines can use them simultaneously. + // If this is an HTTP/2 connection being “returned,” we're done. + if pconn.alt != nil && t.idleLRU.m[pconn] != nil { + return nil + } + + // Deliver pconn to goroutine waiting for idle connection, if any. + // (They may be actively dialing, but this conn is ready first. + // Chrome calls this socket late binding. + // See https://www.chromium.org/developers/design-documents/network-stack#TOC-Connection-Management.) + key := pconn.cacheKey + if q, ok := t.idleConnWait[key]; ok { + done := false + if pconn.alt == nil { + // HTTP/1. + // Loop over the waiting list until we find a w that isn't done already, and hand it pconn. + for q.len() > 0 { + w := q.popFront() + if w.tryDeliver(pconn, nil, time.Time{}) { + done = true + break + } + } + } else { + // HTTP/2. + // Can hand the same pconn to everyone in the waiting list, + // and we still won't be done: we want to put it in the idle + // list unconditionally, for any future clients too. + for q.len() > 0 { + w := q.popFront() + w.tryDeliver(pconn, nil, time.Time{}) + } + } + if q.len() == 0 { + delete(t.idleConnWait, key) + } else { + t.idleConnWait[key] = q + } + if done { + return nil + } + } + + if t.closeIdle { + return errCloseIdle + } + if t.idleConn == nil { + t.idleConn = make(map[connectMethodKey][]*persistConn) + } + idles := t.idleConn[key] + if len(idles) >= t.maxIdleConnsPerHost() { + return errTooManyIdleHost + } + for _, exist := range idles { + if exist == pconn { + log.Fatalf("dup idle pconn %p in freelist", pconn) + } + } + t.idleConn[key] = append(idles, pconn) + t.idleLRU.add(pconn) + if t.MaxIdleConns != 0 && t.idleLRU.len() > t.MaxIdleConns { + oldest := t.idleLRU.removeOldest() + oldest.close(errTooManyIdle) + t.removeIdleConnLocked(oldest) + } + + // Set idle timer, but only for HTTP/1 (pconn.alt == nil). + // The HTTP/2 implementation manages the idle timer itself + // (see idleConnTimeout in h2_bundle.go). + if t.IdleConnTimeout > 0 && pconn.alt == nil { + if pconn.idleTimer != nil { + pconn.idleTimer.Reset(t.IdleConnTimeout) + } else { + pconn.idleTimer = time.AfterFunc(t.IdleConnTimeout, pconn.closeConnIfStillIdle) + } + } + pconn.idleAt = time.Now() + return nil +} + +// queueForIdleConn queues w to receive the next idle connection for w.cm. +// As an optimization hint to the caller, queueForIdleConn reports whether +// it successfully delivered an already-idle connection. +func (t *Transport) queueForIdleConn(w *wantConn) (delivered bool) { + if t.DisableKeepAlives { + return false + } + + t.idleMu.Lock() + defer t.idleMu.Unlock() + + // Stop closing connections that become idle - we might want one. + // (That is, undo the effect of t.CloseIdleConnections.) + t.closeIdle = false + + if w == nil { + // Happens in test hook. + return false + } + + // If IdleConnTimeout is set, calculate the oldest + // persistConn.idleAt time we're willing to use a cached idle + // conn. + var oldTime time.Time + if t.IdleConnTimeout > 0 { + oldTime = time.Now().Add(-t.IdleConnTimeout) + } + + // Look for most recently-used idle connection. + if list, ok := t.idleConn[w.key]; ok { + stop := false + delivered := false + for len(list) > 0 && !stop { + pconn := list[len(list)-1] + + // See whether this connection has been idle too long, considering + // only the wall time (the Round(0)), in case this is a laptop or VM + // coming out of suspend with previously cached idle connections. + tooOld := !oldTime.IsZero() && pconn.idleAt.Round(0).Before(oldTime) + if tooOld { + // Async cleanup. Launch in its own goroutine (as if a + // time.AfterFunc called it); it acquires idleMu, which we're + // holding, and does a synchronous net.Conn.Close. + go pconn.closeConnIfStillIdle() + } + if pconn.isBroken() || tooOld { + // If either persistConn.readLoop has marked the connection + // broken, but Transport.removeIdleConn has not yet removed it + // from the idle list, or if this persistConn is too old (it was + // idle too long), then ignore it and look for another. In both + // cases it's already in the process of being closed. + list = list[:len(list)-1] + continue + } + delivered = w.tryDeliver(pconn, nil, pconn.idleAt) + if delivered { + if pconn.alt != nil { + // HTTP/2: multiple clients can share pconn. + // Leave it in the list. + } else { + // HTTP/1: only one client can use pconn. + // Remove it from the list. + t.idleLRU.remove(pconn) + list = list[:len(list)-1] + } + } + stop = true + } + if len(list) > 0 { + t.idleConn[w.key] = list + } else { + delete(t.idleConn, w.key) + } + if stop { + return delivered + } + } + + // Register to receive next connection that becomes idle. + if t.idleConnWait == nil { + t.idleConnWait = make(map[connectMethodKey]wantConnQueue) + } + q := t.idleConnWait[w.key] + q.cleanFrontNotWaiting() + q.pushBack(w) + t.idleConnWait[w.key] = q + return false +} + +// removeIdleConn marks pconn as dead. +func (t *Transport) removeIdleConn(pconn *persistConn) bool { + t.idleMu.Lock() + defer t.idleMu.Unlock() + return t.removeIdleConnLocked(pconn) +} + +// t.idleMu must be held. +func (t *Transport) removeIdleConnLocked(pconn *persistConn) bool { + if pconn.idleTimer != nil { + pconn.idleTimer.Stop() + } + t.idleLRU.remove(pconn) + key := pconn.cacheKey + pconns := t.idleConn[key] + var removed bool + switch len(pconns) { + case 0: + // Nothing + case 1: + if pconns[0] == pconn { + delete(t.idleConn, key) + removed = true + } + default: + for i, v := range pconns { + if v != pconn { + continue + } + // Slide down, keeping most recently-used + // conns at the end. + copy(pconns[i:], pconns[i+1:]) + t.idleConn[key] = pconns[:len(pconns)-1] + removed = true + break + } + } + return removed +} + +var zeroDialer net.Dialer + +func (t *Transport) dial(ctx context.Context, network, addr string) (net.Conn, error) { + if t.DialContext != nil { + c, err := t.DialContext(ctx, network, addr) + if c == nil && err == nil { + err = errors.New("net/http: Transport.DialContext hook returned (nil, nil)") + } + return c, err + } + if t.Dial != nil { + c, err := t.Dial(network, addr) + if c == nil && err == nil { + err = errors.New("net/http: Transport.Dial hook returned (nil, nil)") + } + return c, err + } + return zeroDialer.DialContext(ctx, network, addr) +} + +// A wantConn records state about a wanted connection +// (that is, an active call to getConn). +// The conn may be gotten by dialing or by finding an idle connection, +// or a cancellation may make the conn no longer wanted. +// These three options are racing against each other and use +// wantConn to coordinate and agree about the winning outcome. +type wantConn struct { + cm connectMethod + key connectMethodKey // cm.key() + + // hooks for testing to know when dials are done + // beforeDial is called in the getConn goroutine when the dial is queued. + // afterDial is called when the dial is completed or canceled. + beforeDial func() + afterDial func() + + mu sync.Mutex // protects ctx, done and sending of the result + ctx context.Context // context for dial, cleared after delivered or canceled + cancelCtx context.CancelFunc + done bool // true after delivered or canceled + result chan connOrError // channel to deliver connection or error +} + +type connOrError struct { + pc *persistConn + err error + idleAt time.Time +} + +// waiting reports whether w is still waiting for an answer (connection or error). +func (w *wantConn) waiting() bool { + w.mu.Lock() + defer w.mu.Unlock() + + return !w.done +} + +// getCtxForDial returns context for dial or nil if connection was delivered or canceled. +func (w *wantConn) getCtxForDial() context.Context { + w.mu.Lock() + defer w.mu.Unlock() + + return w.ctx +} + +// tryDeliver attempts to deliver pc, err to w and reports whether it succeeded. +func (w *wantConn) tryDeliver(pc *persistConn, err error, idleAt time.Time) bool { + w.mu.Lock() + defer w.mu.Unlock() + + if w.done { + return false + } + if (pc == nil) == (err == nil) { + panic("net/http: internal error: misuse of tryDeliver") + } + w.ctx = nil + w.done = true + + w.result <- connOrError{pc: pc, err: err, idleAt: idleAt} + close(w.result) + + return true +} + +// cancel marks w as no longer wanting a result (for example, due to cancellation). +// If a connection has been delivered already, cancel returns it with t.putOrCloseIdleConn. +func (w *wantConn) cancel(t *Transport) { + w.mu.Lock() + var pc *persistConn + if w.done { + if r, ok := <-w.result; ok { + pc = r.pc + } + } else { + close(w.result) + } + w.ctx = nil + w.done = true + w.mu.Unlock() + + // HTTP/2 connections (pc.alt != nil) aren't removed from the idle pool on use, + // and should not be added back here. If the pconn isn't in the idle pool, + // it's because we removed it due to an error. + if pc != nil && pc.alt == nil { + t.putOrCloseIdleConn(pc) + } +} + +// A wantConnQueue is a queue of wantConns. +type wantConnQueue struct { + // This is a queue, not a deque. + // It is split into two stages - head[headPos:] and tail. + // popFront is trivial (headPos++) on the first stage, and + // pushBack is trivial (append) on the second stage. + // If the first stage is empty, popFront can swap the + // first and second stages to remedy the situation. + // + // This two-stage split is analogous to the use of two lists + // in Okasaki's purely functional queue but without the + // overhead of reversing the list when swapping stages. + head []*wantConn + headPos int + tail []*wantConn +} + +// len returns the number of items in the queue. +func (q *wantConnQueue) len() int { + return len(q.head) - q.headPos + len(q.tail) +} + +// pushBack adds w to the back of the queue. +func (q *wantConnQueue) pushBack(w *wantConn) { + q.tail = append(q.tail, w) +} + +// popFront removes and returns the wantConn at the front of the queue. +func (q *wantConnQueue) popFront() *wantConn { + if q.headPos >= len(q.head) { + if len(q.tail) == 0 { + return nil + } + // Pick up tail as new head, clear tail. + q.head, q.headPos, q.tail = q.tail, 0, q.head[:0] + } + w := q.head[q.headPos] + q.head[q.headPos] = nil + q.headPos++ + return w +} + +// peekFront returns the wantConn at the front of the queue without removing it. +func (q *wantConnQueue) peekFront() *wantConn { + if q.headPos < len(q.head) { + return q.head[q.headPos] + } + if len(q.tail) > 0 { + return q.tail[0] + } + return nil +} + +// cleanFrontNotWaiting pops any wantConns that are no longer waiting from the head of the +// queue, reporting whether any were popped. +func (q *wantConnQueue) cleanFrontNotWaiting() (cleaned bool) { + for { + w := q.peekFront() + if w == nil || w.waiting() { + return cleaned + } + q.popFront() + cleaned = true + } +} + +// cleanFrontCanceled pops any wantConns with canceled dials from the head of the queue. +func (q *wantConnQueue) cleanFrontCanceled() { + for { + w := q.peekFront() + if w == nil || w.cancelCtx != nil { + return + } + q.popFront() + } +} + +// all iterates over all wantConns in the queue. +// The caller must not modify the queue while iterating. +func (q *wantConnQueue) all(f func(*wantConn)) { + for _, w := range q.head[q.headPos:] { + f(w) + } + for _, w := range q.tail { + f(w) + } +} + +func (t *Transport) customDialTLS(ctx context.Context, network, addr string) (conn net.Conn, err error) { + if t.DialTLSContext != nil { + conn, err = t.DialTLSContext(ctx, network, addr) + } else { + conn, err = t.DialTLS(network, addr) + } + if conn == nil && err == nil { + err = errors.New("net/http: Transport.DialTLS or DialTLSContext returned (nil, nil)") + } + return +} + +// getConn dials and creates a new persistConn to the target as +// specified in the connectMethod. This includes doing a proxy CONNECT +// and/or setting up TLS. If this doesn't return an error, the persistConn +// is ready to write requests to. +func (t *Transport) getConn(treq *transportRequest, cm connectMethod) (_ *persistConn, err error) { + req := treq.Request + trace := treq.trace + ctx := req.Context() + if trace != nil && trace.GetConn != nil { + trace.GetConn(cm.addr()) + } + + // Detach from the request context's cancellation signal. + // The dial should proceed even if the request is canceled, + // because a future request may be able to make use of the connection. + // + // We retain the request context's values. + dialCtx, dialCancel := context.WithCancel(context.WithoutCancel(ctx)) + + w := &wantConn{ + cm: cm, + key: cm.key(), + ctx: dialCtx, + cancelCtx: dialCancel, + result: make(chan connOrError, 1), + beforeDial: testHookPrePendingDial, + afterDial: testHookPostPendingDial, + } + defer func() { + if err != nil { + w.cancel(t) + } + }() + + // Queue for idle connection. + if delivered := t.queueForIdleConn(w); !delivered { + t.queueForDial(w) + } + + // Wait for completion or cancellation. + select { + case r := <-w.result: + // Trace success but only for HTTP/1. + // HTTP/2 calls trace.GotConn itself. + if r.pc != nil && r.pc.alt == nil && trace != nil && trace.GotConn != nil { + info := httptrace.GotConnInfo{ + Conn: r.pc.conn, + Reused: r.pc.isReused(), + } + if !r.idleAt.IsZero() { + info.WasIdle = true + info.IdleTime = time.Since(r.idleAt) + } + trace.GotConn(info) + } + if r.err != nil { + // If the request has been canceled, that's probably + // what caused r.err; if so, prefer to return the + // cancellation error (see golang.org/issue/16049). + select { + case <-treq.ctx.Done(): + err := context.Cause(treq.ctx) + if err == errRequestCanceled { + err = errRequestCanceledConn + } + return nil, err + default: + // return below + } + } + return r.pc, r.err + case <-treq.ctx.Done(): + err := context.Cause(treq.ctx) + if err == errRequestCanceled { + err = errRequestCanceledConn + } + return nil, err + } +} + +// queueForDial queues w to wait for permission to begin dialing. +// Once w receives permission to dial, it will do so in a separate goroutine. +func (t *Transport) queueForDial(w *wantConn) { + w.beforeDial() + + t.connsPerHostMu.Lock() + defer t.connsPerHostMu.Unlock() + + if t.MaxConnsPerHost <= 0 { + t.startDialConnForLocked(w) + return + } + + if n := t.connsPerHost[w.key]; n < t.MaxConnsPerHost { + if t.connsPerHost == nil { + t.connsPerHost = make(map[connectMethodKey]int) + } + t.connsPerHost[w.key] = n + 1 + t.startDialConnForLocked(w) + return + } + + if t.connsPerHostWait == nil { + t.connsPerHostWait = make(map[connectMethodKey]wantConnQueue) + } + q := t.connsPerHostWait[w.key] + q.cleanFrontNotWaiting() + q.pushBack(w) + t.connsPerHostWait[w.key] = q +} + +// startDialConnFor calls dialConn in a new goroutine. +// t.connsPerHostMu must be held. +func (t *Transport) startDialConnForLocked(w *wantConn) { + t.dialsInProgress.cleanFrontCanceled() + t.dialsInProgress.pushBack(w) + go func() { + t.dialConnFor(w) + t.connsPerHostMu.Lock() + defer t.connsPerHostMu.Unlock() + w.cancelCtx = nil + }() +} + +// dialConnFor dials on behalf of w and delivers the result to w. +// dialConnFor has received permission to dial w.cm and is counted in t.connCount[w.cm.key()]. +// If the dial is canceled or unsuccessful, dialConnFor decrements t.connCount[w.cm.key()]. +func (t *Transport) dialConnFor(w *wantConn) { + defer w.afterDial() + ctx := w.getCtxForDial() + if ctx == nil { + t.decConnsPerHost(w.key) + return + } + + pc, err := t.dialConn(ctx, w.cm) + delivered := w.tryDeliver(pc, err, time.Time{}) + if err == nil && (!delivered || pc.alt != nil) { + // pconn was not passed to w, + // or it is HTTP/2 and can be shared. + // Add to the idle connection pool. + t.putOrCloseIdleConn(pc) + } + if err != nil { + t.decConnsPerHost(w.key) + } +} + +// decConnsPerHost decrements the per-host connection count for key, +// which may in turn give a different waiting goroutine permission to dial. +func (t *Transport) decConnsPerHost(key connectMethodKey) { + if t.MaxConnsPerHost <= 0 { + return + } + + t.connsPerHostMu.Lock() + defer t.connsPerHostMu.Unlock() + n := t.connsPerHost[key] + if n == 0 { + // Shouldn't happen, but if it does, the counting is buggy and could + // easily lead to a silent deadlock, so report the problem loudly. + panic("net/http: internal error: connCount underflow") + } + + // Can we hand this count to a goroutine still waiting to dial? + // (Some goroutines on the wait list may have timed out or + // gotten a connection another way. If they're all gone, + // we don't want to kick off any spurious dial operations.) + if q := t.connsPerHostWait[key]; q.len() > 0 { + done := false + for q.len() > 0 { + w := q.popFront() + if w.waiting() { + t.startDialConnForLocked(w) + done = true + break + } + } + if q.len() == 0 { + delete(t.connsPerHostWait, key) + } else { + // q is a value (like a slice), so we have to store + // the updated q back into the map. + t.connsPerHostWait[key] = q + } + if done { + return + } + } + + // Otherwise, decrement the recorded count. + if n--; n == 0 { + delete(t.connsPerHost, key) + } else { + t.connsPerHost[key] = n + } +} + +// Add TLS to a persistent connection, i.e. negotiate a TLS session. If pconn is already a TLS +// tunnel, this function establishes a nested TLS session inside the encrypted channel. +// The remote endpoint's name may be overridden by TLSClientConfig.ServerName. +func (pconn *persistConn) addTLS(ctx context.Context, name string, trace *httptrace.ClientTrace) error { + // Initiate TLS and check remote host name against certificate. + cfg := cloneTLSConfig(pconn.t.TLSClientConfig) + if cfg.ServerName == "" { + cfg.ServerName = name + } + if pconn.cacheKey.onlyH1 { + cfg.NextProtos = nil + } + plainConn := pconn.conn + tlsConn := tls.Client(plainConn, cfg) + errc := make(chan error, 2) + var timer *time.Timer // for canceling TLS handshake + if d := pconn.t.TLSHandshakeTimeout; d != 0 { + timer = time.AfterFunc(d, func() { + errc <- tlsHandshakeTimeoutError{} + }) + } + go func() { + if trace != nil && trace.TLSHandshakeStart != nil { + trace.TLSHandshakeStart() + } + err := tlsConn.HandshakeContext(ctx) + if timer != nil { + timer.Stop() + } + errc <- err + }() + if err := <-errc; err != nil { + plainConn.Close() + if err == (tlsHandshakeTimeoutError{}) { + // Now that we have closed the connection, + // wait for the call to HandshakeContext to return. + <-errc + } + if trace != nil && trace.TLSHandshakeDone != nil { + trace.TLSHandshakeDone(tls.ConnectionState{}, err) + } + return err + } + cs := tlsConn.ConnectionState() + if trace != nil && trace.TLSHandshakeDone != nil { + trace.TLSHandshakeDone(cs, nil) + } + pconn.tlsState = &cs + pconn.conn = tlsConn + return nil +} + +type erringRoundTripper interface { + RoundTripErr() error +} + +var testHookProxyConnectTimeout = context.WithTimeout + +func (t *Transport) dialConn(ctx context.Context, cm connectMethod) (pconn *persistConn, err error) { + pconn = &persistConn{ + t: t, + cacheKey: cm.key(), + reqch: make(chan requestAndChan, 1), + writech: make(chan writeRequest, 1), + closech: make(chan struct{}), + writeErrCh: make(chan error, 1), + writeLoopDone: make(chan struct{}), + } + trace := httptrace.ContextClientTrace(ctx) + wrapErr := func(err error) error { + if cm.proxyURL != nil { + // Return a typed error, per Issue 16997 + return &net.OpError{Op: "proxyconnect", Net: "tcp", Err: err} + } + return err + } + if cm.scheme() == "https" && t.hasCustomTLSDialer() { + var err error + pconn.conn, err = t.customDialTLS(ctx, "tcp", cm.addr()) + if err != nil { + return nil, wrapErr(err) + } + if tc, ok := pconn.conn.(*tls.Conn); ok { + // Handshake here, in case DialTLS didn't. TLSNextProto below + // depends on it for knowing the connection state. + if trace != nil && trace.TLSHandshakeStart != nil { + trace.TLSHandshakeStart() + } + if err := tc.HandshakeContext(ctx); err != nil { + go pconn.conn.Close() + if trace != nil && trace.TLSHandshakeDone != nil { + trace.TLSHandshakeDone(tls.ConnectionState{}, err) + } + return nil, err + } + cs := tc.ConnectionState() + if trace != nil && trace.TLSHandshakeDone != nil { + trace.TLSHandshakeDone(cs, nil) + } + pconn.tlsState = &cs + } + } else { + conn, err := t.dial(ctx, "tcp", cm.addr()) + if err != nil { + return nil, wrapErr(err) + } + pconn.conn = conn + if cm.scheme() == "https" { + var firstTLSHost string + if firstTLSHost, _, err = net.SplitHostPort(cm.addr()); err != nil { + return nil, wrapErr(err) + } + if err = pconn.addTLS(ctx, firstTLSHost, trace); err != nil { + return nil, wrapErr(err) + } + } + } + + // Proxy setup. + switch { + case cm.proxyURL == nil: + // Do nothing. Not using a proxy. + case cm.proxyURL.Scheme == "socks5" || cm.proxyURL.Scheme == "socks5h": + conn := pconn.conn + d := socksNewDialer("tcp", conn.RemoteAddr().String()) + if u := cm.proxyURL.User; u != nil { + auth := &socksUsernamePassword{ + Username: u.Username(), + } + auth.Password, _ = u.Password() + d.AuthMethods = []socksAuthMethod{ + socksAuthMethodNotRequired, + socksAuthMethodUsernamePassword, + } + d.Authenticate = auth.Authenticate + } + if _, err := d.DialWithConn(ctx, conn, "tcp", cm.targetAddr); err != nil { + conn.Close() + return nil, err + } + case cm.targetScheme == "http": + pconn.isProxy = true + if pa := cm.proxyAuth(); pa != "" { + pconn.mutateHeaderFunc = func(h Header) { + h.Set("Proxy-Authorization", pa) + } + } + case cm.targetScheme == "https": + conn := pconn.conn + var hdr Header + if t.GetProxyConnectHeader != nil { + var err error + hdr, err = t.GetProxyConnectHeader(ctx, cm.proxyURL, cm.targetAddr) + if err != nil { + conn.Close() + return nil, err + } + } else { + hdr = t.ProxyConnectHeader + } + if hdr == nil { + hdr = make(Header) + } + if pa := cm.proxyAuth(); pa != "" { + hdr = hdr.Clone() + hdr.Set("Proxy-Authorization", pa) + } + connectReq := &Request{ + Method: "CONNECT", + URL: &url.URL{Opaque: cm.targetAddr}, + Host: cm.targetAddr, + Header: hdr, + } + + // Set a (long) timeout here to make sure we don't block forever + // and leak a goroutine if the connection stops replying after + // the TCP connect. + connectCtx, cancel := testHookProxyConnectTimeout(ctx, 1*time.Minute) + defer cancel() + + didReadResponse := make(chan struct{}) // closed after CONNECT write+read is done or fails + var ( + resp *Response + err error // write or read error + ) + // Write the CONNECT request & read the response. + go func() { + defer close(didReadResponse) + err = connectReq.Write(conn) + if err != nil { + return + } + // Okay to use and discard buffered reader here, because + // TLS server will not speak until spoken to. + br := bufio.NewReader(conn) + resp, err = ReadResponse(br, connectReq) + }() + select { + case <-connectCtx.Done(): + conn.Close() + <-didReadResponse + return nil, connectCtx.Err() + case <-didReadResponse: + // resp or err now set + } + if err != nil { + conn.Close() + return nil, err + } + + if t.OnProxyConnectResponse != nil { + err = t.OnProxyConnectResponse(ctx, cm.proxyURL, connectReq, resp) + if err != nil { + conn.Close() + return nil, err + } + } + + if resp.StatusCode != 200 { + _, text, ok := strings.Cut(resp.Status, " ") + conn.Close() + if !ok { + return nil, errors.New("unknown status code") + } + return nil, errors.New(text) + } + } + + if cm.proxyURL != nil && cm.targetScheme == "https" { + if err := pconn.addTLS(ctx, cm.tlsHost(), trace); err != nil { + return nil, err + } + } + + // Possible unencrypted HTTP/2 with prior knowledge. + unencryptedHTTP2 := pconn.tlsState == nil && + t.Protocols != nil && + t.Protocols.UnencryptedHTTP2() && + !t.Protocols.HTTP1() + if unencryptedHTTP2 { + next, ok := t.TLSNextProto[nextProtoUnencryptedHTTP2] + if !ok { + return nil, errors.New("http: Transport does not support unencrypted HTTP/2") + } + alt := next(cm.targetAddr, unencryptedTLSConn(pconn.conn)) + if e, ok := alt.(erringRoundTripper); ok { + // pconn.conn was closed by next (http2configureTransports.upgradeFn). + return nil, e.RoundTripErr() + } + return &persistConn{t: t, cacheKey: pconn.cacheKey, alt: alt}, nil + } + + if s := pconn.tlsState; s != nil && s.NegotiatedProtocolIsMutual && s.NegotiatedProtocol != "" { + if next, ok := t.TLSNextProto[s.NegotiatedProtocol]; ok { + alt := next(cm.targetAddr, pconn.conn.(*tls.Conn)) + if e, ok := alt.(erringRoundTripper); ok { + // pconn.conn was closed by next (http2configureTransports.upgradeFn). + return nil, e.RoundTripErr() + } + return &persistConn{t: t, cacheKey: pconn.cacheKey, alt: alt}, nil + } + } + + pconn.br = bufio.NewReaderSize(pconn, t.readBufferSize()) + pconn.bw = bufio.NewWriterSize(persistConnWriter{pconn}, t.writeBufferSize()) + + go pconn.readLoop() + go pconn.writeLoop() + return pconn, nil +} + +// persistConnWriter is the io.Writer written to by pc.bw. +// It accumulates the number of bytes written to the underlying conn, +// so the retry logic can determine whether any bytes made it across +// the wire. +// This is exactly 1 pointer field wide so it can go into an interface +// without allocation. +type persistConnWriter struct { + pc *persistConn +} + +func (w persistConnWriter) Write(p []byte) (n int, err error) { + n, err = w.pc.conn.Write(p) + w.pc.nwrite += int64(n) + return +} + +// ReadFrom exposes persistConnWriter's underlying Conn to io.Copy and if +// the Conn implements io.ReaderFrom, it can take advantage of optimizations +// such as sendfile. +func (w persistConnWriter) ReadFrom(r io.Reader) (n int64, err error) { + n, err = io.Copy(w.pc.conn, r) + w.pc.nwrite += n + return +} + +var _ io.ReaderFrom = (*persistConnWriter)(nil) + +// connectMethod is the map key (in its String form) for keeping persistent +// TCP connections alive for subsequent HTTP requests. +// +// A connect method may be of the following types: +// +// connectMethod.key().String() Description +// ------------------------------ ------------------------- +// |http|foo.com http directly to server, no proxy +// |https|foo.com https directly to server, no proxy +// |https,h1|foo.com https directly to server w/o HTTP/2, no proxy +// http://proxy.com|https|foo.com http to proxy, then CONNECT to foo.com +// http://proxy.com|http http to proxy, http to anywhere after that +// socks5://proxy.com|http|foo.com socks5 to proxy, then http to foo.com +// socks5://proxy.com|https|foo.com socks5 to proxy, then https to foo.com +// https://proxy.com|https|foo.com https to proxy, then CONNECT to foo.com +// https://proxy.com|http https to proxy, http to anywhere after that +type connectMethod struct { + _ incomparable + proxyURL *url.URL // nil for no proxy, else full proxy URL + targetScheme string // "http" or "https" + // If proxyURL specifies an http or https proxy, and targetScheme is http (not https), + // then targetAddr is not included in the connect method key, because the socket can + // be reused for different targetAddr values. + targetAddr string + onlyH1 bool // whether to disable HTTP/2 and force HTTP/1 +} + +func (cm *connectMethod) key() connectMethodKey { + proxyStr := "" + targetAddr := cm.targetAddr + if cm.proxyURL != nil { + proxyStr = cm.proxyURL.String() + if (cm.proxyURL.Scheme == "http" || cm.proxyURL.Scheme == "https") && cm.targetScheme == "http" { + targetAddr = "" + } + } + return connectMethodKey{ + proxy: proxyStr, + scheme: cm.targetScheme, + addr: targetAddr, + onlyH1: cm.onlyH1, + } +} + +// scheme returns the first hop scheme: http, https, or socks5 +func (cm *connectMethod) scheme() string { + if cm.proxyURL != nil { + return cm.proxyURL.Scheme + } + return cm.targetScheme +} + +// addr returns the first hop "host:port" to which we need to TCP connect. +func (cm *connectMethod) addr() string { + if cm.proxyURL != nil { + return canonicalAddr(cm.proxyURL) + } + return cm.targetAddr +} + +// tlsHost returns the host name to match against the peer's +// TLS certificate. +func (cm *connectMethod) tlsHost() string { + h := cm.targetAddr + if hasPort(h) { + h = h[:strings.LastIndex(h, ":")] + } + return h +} + +// connectMethodKey is the map key version of connectMethod, with a +// stringified proxy URL (or the empty string) instead of a pointer to +// a URL. +type connectMethodKey struct { + proxy, scheme, addr string + onlyH1 bool +} + +func (k connectMethodKey) String() string { + // Only used by tests. + var h1 string + if k.onlyH1 { + h1 = ",h1" + } + return fmt.Sprintf("%s|%s%s|%s", k.proxy, k.scheme, h1, k.addr) +} + +// persistConn wraps a connection, usually a persistent one +// (but may be used for non-keep-alive requests as well) +type persistConn struct { + // alt optionally specifies the TLS NextProto RoundTripper. + // This is used for HTTP/2 today and future protocols later. + // If it's non-nil, the rest of the fields are unused. + alt RoundTripper + + t *Transport + cacheKey connectMethodKey + conn net.Conn + tlsState *tls.ConnectionState + br *bufio.Reader // from conn + bw *bufio.Writer // to conn + nwrite int64 // bytes written + reqch chan requestAndChan // written by roundTrip; read by readLoop + writech chan writeRequest // written by roundTrip; read by writeLoop + closech chan struct{} // closed when conn closed + isProxy bool + sawEOF bool // whether we've seen EOF from conn; owned by readLoop + readLimit int64 // bytes allowed to be read; owned by readLoop + // writeErrCh passes the request write error (usually nil) + // from the writeLoop goroutine to the readLoop which passes + // it off to the res.Body reader, which then uses it to decide + // whether or not a connection can be reused. Issue 7569. + writeErrCh chan error + + writeLoopDone chan struct{} // closed when write loop ends + + // Both guarded by Transport.idleMu: + idleAt time.Time // time it last become idle + idleTimer *time.Timer // holding an AfterFunc to close it + + mu sync.Mutex // guards following fields + numExpectedResponses int + closed error // set non-nil when conn is closed, before closech is closed + canceledErr error // set non-nil if conn is canceled + broken bool // an error has happened on this connection; marked broken so it's not reused. + reused bool // whether conn has had successful request/response and is being reused. + // mutateHeaderFunc is an optional func to modify extra + // headers on each outbound request before it's written. (the + // original Request given to RoundTrip is not modified) + mutateHeaderFunc func(Header) +} + +func (pc *persistConn) maxHeaderResponseSize() int64 { + if v := pc.t.MaxResponseHeaderBytes; v != 0 { + return v + } + return 10 << 20 // conservative default; same as http2 +} + +func (pc *persistConn) Read(p []byte) (n int, err error) { + if pc.readLimit <= 0 { + return 0, fmt.Errorf("read limit of %d bytes exhausted", pc.maxHeaderResponseSize()) + } + if int64(len(p)) > pc.readLimit { + p = p[:pc.readLimit] + } + n, err = pc.conn.Read(p) + if err == io.EOF { + pc.sawEOF = true + } + pc.readLimit -= int64(n) + return +} + +// isBroken reports whether this connection is in a known broken state. +func (pc *persistConn) isBroken() bool { + pc.mu.Lock() + b := pc.closed != nil + pc.mu.Unlock() + return b +} + +// canceled returns non-nil if the connection was closed due to +// CancelRequest or due to context cancellation. +func (pc *persistConn) canceled() error { + pc.mu.Lock() + defer pc.mu.Unlock() + return pc.canceledErr +} + +// isReused reports whether this connection has been used before. +func (pc *persistConn) isReused() bool { + pc.mu.Lock() + r := pc.reused + pc.mu.Unlock() + return r +} + +func (pc *persistConn) cancelRequest(err error) { + pc.mu.Lock() + defer pc.mu.Unlock() + pc.canceledErr = err + pc.closeLocked(errRequestCanceled) +} + +// closeConnIfStillIdle closes the connection if it's still sitting idle. +// This is what's called by the persistConn's idleTimer, and is run in its +// own goroutine. +func (pc *persistConn) closeConnIfStillIdle() { + t := pc.t + t.idleMu.Lock() + defer t.idleMu.Unlock() + if _, ok := t.idleLRU.m[pc]; !ok { + // Not idle. + return + } + t.removeIdleConnLocked(pc) + pc.close(errIdleConnTimeout) +} + +// mapRoundTripError returns the appropriate error value for +// persistConn.roundTrip. +// +// The provided err is the first error that (*persistConn).roundTrip +// happened to receive from its select statement. +// +// The startBytesWritten value should be the value of pc.nwrite before the roundTrip +// started writing the request. +func (pc *persistConn) mapRoundTripError(req *transportRequest, startBytesWritten int64, err error) error { + if err == nil { + return nil + } + + // Wait for the writeLoop goroutine to terminate to avoid data + // races on callers who mutate the request on failure. + // + // When resc in pc.roundTrip and hence rc.ch receives a responseAndError + // with a non-nil error it implies that the persistConn is either closed + // or closing. Waiting on pc.writeLoopDone is hence safe as all callers + // close closech which in turn ensures writeLoop returns. + <-pc.writeLoopDone + + // If the request was canceled, that's better than network + // failures that were likely the result of tearing down the + // connection. + if cerr := pc.canceled(); cerr != nil { + return cerr + } + + // See if an error was set explicitly. + req.mu.Lock() + reqErr := req.err + req.mu.Unlock() + if reqErr != nil { + return reqErr + } + + if err == errServerClosedIdle { + // Don't decorate + return err + } + + if _, ok := err.(transportReadFromServerError); ok { + if pc.nwrite == startBytesWritten { + return nothingWrittenError{err} + } + // Don't decorate + return err + } + if pc.isBroken() { + if pc.nwrite == startBytesWritten { + return nothingWrittenError{err} + } + return fmt.Errorf("net/http: HTTP/1.x transport connection broken: %w", err) + } + return err +} + +// errCallerOwnsConn is an internal sentinel error used when we hand +// off a writable response.Body to the caller. We use this to prevent +// closing a net.Conn that is now owned by the caller. +var errCallerOwnsConn = errors.New("read loop ending; caller owns writable underlying conn") + +func (pc *persistConn) readLoop() { + closeErr := errReadLoopExiting // default value, if not changed below + defer func() { + pc.close(closeErr) + pc.t.removeIdleConn(pc) + }() + + tryPutIdleConn := func(treq *transportRequest) bool { + trace := treq.trace + if err := pc.t.tryPutIdleConn(pc); err != nil { + closeErr = err + if trace != nil && trace.PutIdleConn != nil && err != errKeepAlivesDisabled { + trace.PutIdleConn(err) + } + return false + } + if trace != nil && trace.PutIdleConn != nil { + trace.PutIdleConn(nil) + } + return true + } + + // eofc is used to block caller goroutines reading from Response.Body + // at EOF until this goroutines has (potentially) added the connection + // back to the idle pool. + eofc := make(chan struct{}) + defer close(eofc) // unblock reader on errors + + // Read this once, before loop starts. (to avoid races in tests) + testHookMu.Lock() + testHookReadLoopBeforeNextRead := testHookReadLoopBeforeNextRead + testHookMu.Unlock() + + alive := true + for alive { + pc.readLimit = pc.maxHeaderResponseSize() + _, err := pc.br.Peek(1) + + pc.mu.Lock() + if pc.numExpectedResponses == 0 { + pc.readLoopPeekFailLocked(err) + pc.mu.Unlock() + return + } + pc.mu.Unlock() + + rc := <-pc.reqch + trace := rc.treq.trace + + var resp *Response + if err == nil { + resp, err = pc.readResponse(rc, trace) + } else { + err = transportReadFromServerError{err} + closeErr = err + } + + if err != nil { + if pc.readLimit <= 0 { + err = fmt.Errorf("net/http: server response headers exceeded %d bytes; aborted", pc.maxHeaderResponseSize()) + } + + select { + case rc.ch <- responseAndError{err: err}: + case <-rc.callerGone: + return + } + return + } + pc.readLimit = maxInt64 // effectively no limit for response bodies + + pc.mu.Lock() + pc.numExpectedResponses-- + pc.mu.Unlock() + + bodyWritable := resp.bodyIsWritable() + hasBody := rc.treq.Request.Method != "HEAD" && resp.ContentLength != 0 + + if resp.Close || rc.treq.Request.Close || resp.StatusCode <= 199 || bodyWritable { + // Don't do keep-alive on error if either party requested a close + // or we get an unexpected informational (1xx) response. + // StatusCode 100 is already handled above. + alive = false + } + + if !hasBody || bodyWritable { + // Put the idle conn back into the pool before we send the response + // so if they process it quickly and make another request, they'll + // get this same conn. But we use the unbuffered channel 'rc' + // to guarantee that persistConn.roundTrip got out of its select + // potentially waiting for this persistConn to close. + alive = alive && + !pc.sawEOF && + pc.wroteRequest() && + tryPutIdleConn(rc.treq) + + if bodyWritable { + closeErr = errCallerOwnsConn + } + + select { + case rc.ch <- responseAndError{res: resp}: + case <-rc.callerGone: + return + } + + rc.treq.cancel(errRequestDone) + + // Now that they've read from the unbuffered channel, they're safely + // out of the select that also waits on this goroutine to die, so + // we're allowed to exit now if needed (if alive is false) + testHookReadLoopBeforeNextRead() + continue + } + + waitForBodyRead := make(chan bool, 2) + body := &bodyEOFSignal{ + body: resp.Body, + earlyCloseFn: func() error { + waitForBodyRead <- false + <-eofc // will be closed by deferred call at the end of the function + return nil + + }, + fn: func(err error) error { + isEOF := err == io.EOF + waitForBodyRead <- isEOF + if isEOF { + <-eofc // see comment above eofc declaration + } else if err != nil { + if cerr := pc.canceled(); cerr != nil { + return cerr + } + } + return err + }, + } + + resp.Body = body + if rc.addedGzip && ascii.EqualFold(resp.Header.Get("Content-Encoding"), "gzip") { + resp.Body = &gzipReader{body: body} + resp.Header.Del("Content-Encoding") + resp.Header.Del("Content-Length") + resp.ContentLength = -1 + resp.Uncompressed = true + } + + select { + case rc.ch <- responseAndError{res: resp}: + case <-rc.callerGone: + return + } + + // Before looping back to the top of this function and peeking on + // the bufio.Reader, wait for the caller goroutine to finish + // reading the response body. (or for cancellation or death) + select { + case bodyEOF := <-waitForBodyRead: + alive = alive && + bodyEOF && + !pc.sawEOF && + pc.wroteRequest() && + tryPutIdleConn(rc.treq) + if bodyEOF { + eofc <- struct{}{} + } + case <-rc.treq.ctx.Done(): + alive = false + pc.cancelRequest(context.Cause(rc.treq.ctx)) + case <-pc.closech: + alive = false + } + + rc.treq.cancel(errRequestDone) + testHookReadLoopBeforeNextRead() + } +} + +func (pc *persistConn) readLoopPeekFailLocked(peekErr error) { + if pc.closed != nil { + return + } + if n := pc.br.Buffered(); n > 0 { + buf, _ := pc.br.Peek(n) + if is408Message(buf) { + pc.closeLocked(errServerClosedIdle) + return + } else { + // pass + // log.Printf("Unsolicited response received on idle HTTP channel starting with %q; err=%v", buf, peekErr) + } + } + if peekErr == io.EOF { + // common case. + pc.closeLocked(errServerClosedIdle) + } else { + pc.closeLocked(fmt.Errorf("readLoopPeekFailLocked: %w", peekErr)) + } +} + +// is408Message reports whether buf has the prefix of an +// HTTP 408 Request Timeout response. +// See golang.org/issue/32310. +func is408Message(buf []byte) bool { + if len(buf) < len("HTTP/1.x 408") { + return false + } + if string(buf[:7]) != "HTTP/1." { + return false + } + return string(buf[8:12]) == " 408" +} + +// readResponse reads an HTTP response (or two, in the case of "Expect: +// 100-continue") from the server. It returns the final non-100 one. +// trace is optional. +func (pc *persistConn) readResponse(rc requestAndChan, trace *httptrace.ClientTrace) (resp *Response, err error) { + if trace != nil && trace.GotFirstResponseByte != nil { + if peek, err := pc.br.Peek(1); err == nil && len(peek) == 1 { + trace.GotFirstResponseByte() + } + } + + continueCh := rc.continueCh + for { + resp, err = ReadResponse(pc.br, rc.treq.Request) + if err != nil { + return + } + resCode := resp.StatusCode + if continueCh != nil && resCode == StatusContinue { + if trace != nil && trace.Got100Continue != nil { + trace.Got100Continue() + } + continueCh <- struct{}{} + continueCh = nil + } + is1xx := 100 <= resCode && resCode <= 199 + // treat 101 as a terminal status, see issue 26161 + is1xxNonTerminal := is1xx && resCode != StatusSwitchingProtocols + if is1xxNonTerminal { + if trace != nil && trace.Got1xxResponse != nil { + if err := trace.Got1xxResponse(resCode, textproto.MIMEHeader(resp.Header)); err != nil { + return nil, err + } + // If the 1xx response was delivered to the user, + // then they're responsible for limiting the number of + // responses. Reset the header limit. + // + // If the user didn't examine the 1xx response, then we + // limit the size of all headers (including both 1xx + // and the final response) to maxHeaderResponseSize. + pc.readLimit = pc.maxHeaderResponseSize() // reset the limit + } + continue + } + break + } + if resp.isProtocolSwitch() { + resp.Body = newReadWriteCloserBody(pc.br, pc.conn) + } + if continueCh != nil { + // We send an "Expect: 100-continue" header, but the server + // responded with a terminal status and no 100 Continue. + // + // If we're going to keep using the connection, we need to send the request body. + // Tell writeLoop to skip sending the body if we're going to close the connection, + // or to send it otherwise. + // + // The case where we receive a 101 Switching Protocols response is a bit + // ambiguous, since we don't know what protocol we're switching to. + // Conceivably, it's one that doesn't need us to send the body. + // Given that we'll send the body if ExpectContinueTimeout expires, + // be consistent and always send it if we aren't closing the connection. + if resp.Close || rc.treq.Request.Close { + close(continueCh) // don't send the body; the connection will close + } else { + continueCh <- struct{}{} // send the body + } + } + + resp.TLS = pc.tlsState + return +} + +// waitForContinue returns the function to block until +// any response, timeout or connection close. After any of them, +// the function returns a bool which indicates if the body should be sent. +func (pc *persistConn) waitForContinue(continueCh <-chan struct{}) func() bool { + if continueCh == nil { + return nil + } + return func() bool { + timer := time.NewTimer(pc.t.ExpectContinueTimeout) + defer timer.Stop() + + select { + case _, ok := <-continueCh: + return ok + case <-timer.C: + return true + case <-pc.closech: + return false + } + } +} + +func newReadWriteCloserBody(br *bufio.Reader, rwc io.ReadWriteCloser) io.ReadWriteCloser { + body := &readWriteCloserBody{ReadWriteCloser: rwc} + if br.Buffered() != 0 { + body.br = br + } + return body +} + +// readWriteCloserBody is the Response.Body type used when we want to +// give users write access to the Body through the underlying +// connection (TCP, unless using custom dialers). This is then +// the concrete type for a Response.Body on the 101 Switching +// Protocols response, as used by WebSockets, h2c, etc. +type readWriteCloserBody struct { + _ incomparable + br *bufio.Reader // used until empty + io.ReadWriteCloser +} + +func (b *readWriteCloserBody) Read(p []byte) (n int, err error) { + if b.br != nil { + if n := b.br.Buffered(); len(p) > n { + p = p[:n] + } + n, err = b.br.Read(p) + if b.br.Buffered() == 0 { + b.br = nil + } + return n, err + } + return b.ReadWriteCloser.Read(p) +} + +func (b *readWriteCloserBody) CloseWrite() error { + if cw, ok := b.ReadWriteCloser.(interface{ CloseWrite() error }); ok { + return cw.CloseWrite() + } + return fmt.Errorf("CloseWrite: %w", ErrNotSupported) +} + +// nothingWrittenError wraps a write errors which ended up writing zero bytes. +type nothingWrittenError struct { + error +} + +func (nwe nothingWrittenError) Unwrap() error { + return nwe.error +} + +func (pc *persistConn) writeLoop() { + defer close(pc.writeLoopDone) + for { + select { + case wr := <-pc.writech: + startBytesWritten := pc.nwrite + err := wr.req.Request.write(pc.bw, pc.isProxy, wr.req.extra, pc.waitForContinue(wr.continueCh)) + if bre, ok := err.(requestBodyReadError); ok { + err = bre.error + // Errors reading from the user's + // Request.Body are high priority. + // Set it here before sending on the + // channels below or calling + // pc.close() which tears down + // connections and causes other + // errors. + wr.req.setError(err) + } + if err == nil { + err = pc.bw.Flush() + } + if err != nil { + if pc.nwrite == startBytesWritten { + err = nothingWrittenError{err} + } + } + pc.writeErrCh <- err // to the body reader, which might recycle us + wr.ch <- err // to the roundTrip function + if err != nil { + pc.close(err) + return + } + case <-pc.closech: + return + } + } +} + +// maxWriteWaitBeforeConnReuse is how long the a Transport RoundTrip +// will wait to see the Request's Body.Write result after getting a +// response from the server. See comments in (*persistConn).wroteRequest. +// +// In tests, we set this to a large value to avoid flakiness from inconsistent +// recycling of connections. +var maxWriteWaitBeforeConnReuse = 50 * time.Millisecond + +// wroteRequest is a check before recycling a connection that the previous write +// (from writeLoop above) happened and was successful. +func (pc *persistConn) wroteRequest() bool { + select { + case err := <-pc.writeErrCh: + // Common case: the write happened well before the response, so + // avoid creating a timer. + return err == nil + default: + // Rare case: the request was written in writeLoop above but + // before it could send to pc.writeErrCh, the reader read it + // all, processed it, and called us here. In this case, give the + // write goroutine a bit of time to finish its send. + // + // Less rare case: We also get here in the legitimate case of + // Issue 7569, where the writer is still writing (or stalled), + // but the server has already replied. In this case, we don't + // want to wait too long, and we want to return false so this + // connection isn't re-used. + t := time.NewTimer(maxWriteWaitBeforeConnReuse) + defer t.Stop() + select { + case err := <-pc.writeErrCh: + return err == nil + case <-t.C: + return false + } + } +} + +// responseAndError is how the goroutine reading from an HTTP/1 server +// communicates with the goroutine doing the RoundTrip. +type responseAndError struct { + _ incomparable + res *Response // else use this response (see res method) + err error +} + +type requestAndChan struct { + _ incomparable + treq *transportRequest + ch chan responseAndError // unbuffered; always send in select on callerGone + + // whether the Transport (as opposed to the user client code) + // added the Accept-Encoding gzip header. If the Transport + // set it, only then do we transparently decode the gzip. + addedGzip bool + + // Optional blocking chan for Expect: 100-continue (for send). + // If the request has an "Expect: 100-continue" header and + // the server responds 100 Continue, readLoop send a value + // to writeLoop via this chan. + continueCh chan<- struct{} + + callerGone <-chan struct{} // closed when roundTrip caller has returned +} + +// A writeRequest is sent by the caller's goroutine to the +// writeLoop's goroutine to write a request while the read loop +// concurrently waits on both the write response and the server's +// reply. +type writeRequest struct { + req *transportRequest + ch chan<- error + + // Optional blocking chan for Expect: 100-continue (for receive). + // If not nil, writeLoop blocks sending request body until + // it receives from this chan. + continueCh <-chan struct{} +} + +// httpTimeoutError represents a timeout. +// It implements net.Error and wraps context.DeadlineExceeded. +type timeoutError struct { + err string +} + +func (e *timeoutError) Error() string { return e.err } +func (e *timeoutError) Timeout() bool { return true } +func (e *timeoutError) Temporary() bool { return true } +func (e *timeoutError) Is(err error) bool { return err == context.DeadlineExceeded } + +var errTimeout error = &timeoutError{"net/http: timeout awaiting response headers"} + +// errRequestCanceled is set to be identical to the one from h2 to facilitate +// testing. +var errRequestCanceled = http2errRequestCanceled +var errRequestCanceledConn = errors.New("net/http: request canceled while waiting for connection") // TODO: unify? + +// errRequestDone is used to cancel the round trip Context after a request is successfully done. +// It should not be seen by the user. +var errRequestDone = errors.New("net/http: request completed") + +func nop() {} + +// testHooks. Always non-nil. +var ( + testHookEnterRoundTrip = nop + testHookWaitResLoop = nop + testHookRoundTripRetried = nop + testHookPrePendingDial = nop + testHookPostPendingDial = nop + + testHookMu sync.Locker = fakeLocker{} // guards following + testHookReadLoopBeforeNextRead = nop +) + +func (pc *persistConn) roundTrip(req *transportRequest) (resp *Response, err error) { + testHookEnterRoundTrip() + pc.mu.Lock() + pc.numExpectedResponses++ + headerFn := pc.mutateHeaderFunc + pc.mu.Unlock() + + if headerFn != nil { + headerFn(req.extraHeaders()) + } + + // Ask for a compressed version if the caller didn't set their + // own value for Accept-Encoding. We only attempt to + // uncompress the gzip stream if we were the layer that + // requested it. + requestedGzip := false + if !pc.t.DisableCompression && + req.Header.Get("Accept-Encoding") == "" && + req.Header.Get("Range") == "" && + req.Method != "HEAD" { + // Request gzip only, not deflate. Deflate is ambiguous and + // not as universally supported anyway. + // See: https://zlib.net/zlib_faq.html#faq39 + // + // Note that we don't request this for HEAD requests, + // due to a bug in nginx: + // https://trac.nginx.org/nginx/ticket/358 + // https://golang.org/issue/5522 + // + // We don't request gzip if the request is for a range, since + // auto-decoding a portion of a gzipped document will just fail + // anyway. See https://golang.org/issue/8923 + requestedGzip = true + req.extraHeaders().Set("Accept-Encoding", "gzip") + } + + var continueCh chan struct{} + if req.ProtoAtLeast(1, 1) && req.Body != nil && req.expectsContinue() { + continueCh = make(chan struct{}, 1) + } + + if pc.t.DisableKeepAlives && + !req.wantsClose() && + !isProtocolSwitchHeader(req.Header) { + req.extraHeaders().Set("Connection", "close") + } + + gone := make(chan struct{}) + defer close(gone) + + const debugRoundTrip = false + + // Write the request concurrently with waiting for a response, + // in case the server decides to reply before reading our full + // request body. + startBytesWritten := pc.nwrite + writeErrCh := make(chan error, 1) + pc.writech <- writeRequest{req, writeErrCh, continueCh} + + resc := make(chan responseAndError) + pc.reqch <- requestAndChan{ + treq: req, + ch: resc, + addedGzip: requestedGzip, + continueCh: continueCh, + callerGone: gone, + } + + handleResponse := func(re responseAndError) (*Response, error) { + if (re.res == nil) == (re.err == nil) { + panic(fmt.Sprintf("internal error: exactly one of res or err should be set; nil=%v", re.res == nil)) + } + if debugRoundTrip { + req.logf("resc recv: %p, %T/%#v", re.res, re.err, re.err) + } + if re.err != nil { + return nil, pc.mapRoundTripError(req, startBytesWritten, re.err) + } + return re.res, nil + } + + var respHeaderTimer <-chan time.Time + ctxDoneChan := req.ctx.Done() + pcClosed := pc.closech + for { + testHookWaitResLoop() + select { + case err := <-writeErrCh: + if debugRoundTrip { + req.logf("writeErrCh recv: %T/%#v", err, err) + } + if err != nil { + pc.close(fmt.Errorf("write error: %w", err)) + return nil, pc.mapRoundTripError(req, startBytesWritten, err) + } + if d := pc.t.ResponseHeaderTimeout; d > 0 { + if debugRoundTrip { + req.logf("starting timer for %v", d) + } + timer := time.NewTimer(d) + defer timer.Stop() // prevent leaks + respHeaderTimer = timer.C + } + case <-pcClosed: + select { + case re := <-resc: + // The pconn closing raced with the response to the request, + // probably after the server wrote a response and immediately + // closed the connection. Use the response. + return handleResponse(re) + default: + } + if debugRoundTrip { + req.logf("closech recv: %T %#v", pc.closed, pc.closed) + } + return nil, pc.mapRoundTripError(req, startBytesWritten, pc.closed) + case <-respHeaderTimer: + if debugRoundTrip { + req.logf("timeout waiting for response headers.") + } + pc.close(errTimeout) + return nil, errTimeout + case re := <-resc: + return handleResponse(re) + case <-ctxDoneChan: + select { + case re := <-resc: + // readLoop is responsible for canceling req.ctx after + // it reads the response body. Check for a response racing + // the context close, and use the response if available. + return handleResponse(re) + default: + } + pc.cancelRequest(context.Cause(req.ctx)) + } + } +} + +// tLogKey is a context WithValue key for test debugging contexts containing +// a t.Logf func. See export_test.go's Request.WithT method. +type tLogKey struct{} + +func (tr *transportRequest) logf(format string, args ...any) { + if logf, ok := tr.Request.Context().Value(tLogKey{}).(func(string, ...any)); ok { + logf(time.Now().Format(time.RFC3339Nano)+": "+format, args...) + } +} + +// markReused marks this connection as having been successfully used for a +// request and response. +func (pc *persistConn) markReused() { + pc.mu.Lock() + pc.reused = true + pc.mu.Unlock() +} + +// close closes the underlying TCP connection and closes +// the pc.closech channel. +// +// The provided err is only for testing and debugging; in normal +// circumstances it should never be seen by users. +func (pc *persistConn) close(err error) { + pc.mu.Lock() + defer pc.mu.Unlock() + pc.closeLocked(err) +} + +func (pc *persistConn) closeLocked(err error) { + if err == nil { + panic("nil error") + } + pc.broken = true + if pc.closed == nil { + pc.closed = err + pc.t.decConnsPerHost(pc.cacheKey) + // Close HTTP/1 (pc.alt == nil) connection. + // HTTP/2 closes its connection itself. + if pc.alt == nil { + if err != errCallerOwnsConn { + pc.conn.Close() + } + close(pc.closech) + } + } + pc.mutateHeaderFunc = nil +} + +func schemePort(scheme string) string { + switch scheme { + case "http": + return "80" + case "https": + return "443" + case "socks5", "socks5h": + return "1080" + default: + return "" + } +} + +func idnaASCIIFromURL(url *url.URL) string { + addr := url.Hostname() + if v, err := idnaASCII(addr); err == nil { + addr = v + } + return addr +} + +// canonicalAddr returns url.Host but always with a ":port" suffix. +func canonicalAddr(url *url.URL) string { + port := url.Port() + if port == "" { + port = schemePort(url.Scheme) + } + return net.JoinHostPort(idnaASCIIFromURL(url), port) +} + +// bodyEOFSignal is used by the HTTP/1 transport when reading response +// bodies to make sure we see the end of a response body before +// proceeding and reading on the connection again. +// +// It wraps a ReadCloser but runs fn (if non-nil) at most +// once, right before its final (error-producing) Read or Close call +// returns. fn should return the new error to return from Read or Close. +// +// If earlyCloseFn is non-nil and Close is called before io.EOF is +// seen, earlyCloseFn is called instead of fn, and its return value is +// the return value from Close. +type bodyEOFSignal struct { + body io.ReadCloser + mu sync.Mutex // guards following 4 fields + closed bool // whether Close has been called + rerr error // sticky Read error + fn func(error) error // err will be nil on Read io.EOF + earlyCloseFn func() error // optional alt Close func used if io.EOF not seen +} + +var errReadOnClosedResBody = errors.New("http: read on closed response body") + +func (es *bodyEOFSignal) Read(p []byte) (n int, err error) { + es.mu.Lock() + closed, rerr := es.closed, es.rerr + es.mu.Unlock() + if closed { + return 0, errReadOnClosedResBody + } + if rerr != nil { + return 0, rerr + } + + n, err = es.body.Read(p) + if err != nil { + es.mu.Lock() + defer es.mu.Unlock() + if es.rerr == nil { + es.rerr = err + } + err = es.condfn(err) + } + return +} + +func (es *bodyEOFSignal) Close() error { + es.mu.Lock() + defer es.mu.Unlock() + if es.closed { + return nil + } + es.closed = true + if es.earlyCloseFn != nil && es.rerr != io.EOF { + return es.earlyCloseFn() + } + err := es.body.Close() + return es.condfn(err) +} + +// caller must hold es.mu. +func (es *bodyEOFSignal) condfn(err error) error { + if es.fn == nil { + return err + } + err = es.fn(err) + es.fn = nil + return err +} + +// gzipReader wraps a response body so it can lazily +// call gzip.NewReader on the first call to Read +type gzipReader struct { + _ incomparable + body *bodyEOFSignal // underlying HTTP/1 response body framing + zr *gzip.Reader // lazily-initialized gzip reader + zerr error // any error from gzip.NewReader; sticky +} + +func (gz *gzipReader) Read(p []byte) (n int, err error) { + if gz.zr == nil { + if gz.zerr == nil { + gz.zr, gz.zerr = gzip.NewReader(gz.body) + } + if gz.zerr != nil { + return 0, gz.zerr + } + } + + gz.body.mu.Lock() + if gz.body.closed { + err = errReadOnClosedResBody + } + gz.body.mu.Unlock() + + if err != nil { + return 0, err + } + return gz.zr.Read(p) +} + +func (gz *gzipReader) Close() error { + return gz.body.Close() +} + +type tlsHandshakeTimeoutError struct{} + +func (tlsHandshakeTimeoutError) Timeout() bool { return true } +func (tlsHandshakeTimeoutError) Temporary() bool { return true } +func (tlsHandshakeTimeoutError) Error() string { return "net/http: TLS handshake timeout" } + +// fakeLocker is a sync.Locker which does nothing. It's used to guard +// test-only fields when not under test, to avoid runtime atomic +// overhead. +type fakeLocker struct{} + +func (fakeLocker) Lock() {} +func (fakeLocker) Unlock() {} + +// cloneTLSConfig returns a shallow clone of cfg, or a new zero tls.Config if +// cfg is nil. This is safe to call even if cfg is in active use by a TLS +// client or server. +// +// cloneTLSConfig should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/searKing/golang +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname cloneTLSConfig +func cloneTLSConfig(cfg *tls.Config) *tls.Config { + if cfg == nil { + return &tls.Config{} + } + return cfg.Clone() +} + +type connLRU struct { + ll *list.List // list.Element.Value type is of *persistConn + m map[*persistConn]*list.Element +} + +// add adds pc to the head of the linked list. +func (cl *connLRU) add(pc *persistConn) { + if cl.ll == nil { + cl.ll = list.New() + cl.m = make(map[*persistConn]*list.Element) + } + ele := cl.ll.PushFront(pc) + if _, ok := cl.m[pc]; ok { + panic("persistConn was already in LRU") + } + cl.m[pc] = ele +} + +func (cl *connLRU) removeOldest() *persistConn { + ele := cl.ll.Back() + pc := ele.Value.(*persistConn) + cl.ll.Remove(ele) + delete(cl.m, pc) + return pc +} + +// remove removes pc from cl. +func (cl *connLRU) remove(pc *persistConn) { + if ele, ok := cl.m[pc]; ok { + cl.ll.Remove(ele) + delete(cl.m, pc) + } +} + +// len returns the number of items in the cache. +func (cl *connLRU) len() int { + return len(cl.m) +} diff --git a/backend/vendor/github.com/enetx/http/transport_default_other.go b/backend/vendor/github.com/enetx/http/transport_default_other.go new file mode 100644 index 0000000..4f6c5c1 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/transport_default_other.go @@ -0,0 +1,16 @@ +// Copyright 2021 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build !wasm + +package http + +import ( + "context" + "net" +) + +func defaultTransportDialContext(dialer *net.Dialer) func(context.Context, string, string) (net.Conn, error) { + return dialer.DialContext +} diff --git a/backend/vendor/github.com/enetx/http/transport_default_wasm.go b/backend/vendor/github.com/enetx/http/transport_default_wasm.go new file mode 100644 index 0000000..3946812 --- /dev/null +++ b/backend/vendor/github.com/enetx/http/transport_default_wasm.go @@ -0,0 +1,16 @@ +// Copyright 2021 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build (js && wasm) || wasip1 + +package http + +import ( + "context" + "net" +) + +func defaultTransportDialContext(dialer *net.Dialer) func(context.Context, string, string) (net.Conn, error) { + return nil +} diff --git a/backend/vendor/github.com/enetx/http2/ascii.go b/backend/vendor/github.com/enetx/http2/ascii.go new file mode 100644 index 0000000..17caa20 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/ascii.go @@ -0,0 +1,53 @@ +// Copyright 2021 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import "strings" + +// The HTTP protocols are defined in terms of ASCII, not Unicode. This file +// contains helper functions which may use Unicode-aware functions which would +// otherwise be unsafe and could introduce vulnerabilities if used improperly. + +// asciiEqualFold is strings.EqualFold, ASCII only. It reports whether s and t +// are equal, ASCII-case-insensitively. +func asciiEqualFold(s, t string) bool { + if len(s) != len(t) { + return false + } + for i := 0; i < len(s); i++ { + if lower(s[i]) != lower(t[i]) { + return false + } + } + return true +} + +// lower returns the ASCII lowercase version of b. +func lower(b byte) byte { + if 'A' <= b && b <= 'Z' { + return b + ('a' - 'A') + } + return b +} + +// isASCIIPrint returns whether s is ASCII and printable according to +// https://tools.ietf.org/html/rfc20#section-4.2. +func isASCIIPrint(s string) bool { + for i := 0; i < len(s); i++ { + if s[i] < ' ' || s[i] > '~' { + return false + } + } + return true +} + +// asciiToLower returns the lowercase version of s if s is ASCII and printable, +// and whether or not it was. +func asciiToLower(s string) (lower string, ok bool) { + if !isASCIIPrint(s) { + return "", false + } + return strings.ToLower(s), true +} diff --git a/backend/vendor/github.com/enetx/http2/ciphers.go b/backend/vendor/github.com/enetx/http2/ciphers.go new file mode 100644 index 0000000..c9a0cf3 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/ciphers.go @@ -0,0 +1,641 @@ +// Copyright 2017 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +// A list of the possible cipher suite ids. Taken from +// https://www.iana.org/assignments/tls-parameters/tls-parameters.txt + +const ( + cipher_TLS_NULL_WITH_NULL_NULL uint16 = 0x0000 + cipher_TLS_RSA_WITH_NULL_MD5 uint16 = 0x0001 + cipher_TLS_RSA_WITH_NULL_SHA uint16 = 0x0002 + cipher_TLS_RSA_EXPORT_WITH_RC4_40_MD5 uint16 = 0x0003 + cipher_TLS_RSA_WITH_RC4_128_MD5 uint16 = 0x0004 + cipher_TLS_RSA_WITH_RC4_128_SHA uint16 = 0x0005 + cipher_TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5 uint16 = 0x0006 + cipher_TLS_RSA_WITH_IDEA_CBC_SHA uint16 = 0x0007 + cipher_TLS_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0008 + cipher_TLS_RSA_WITH_DES_CBC_SHA uint16 = 0x0009 + cipher_TLS_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x000A + cipher_TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x000B + cipher_TLS_DH_DSS_WITH_DES_CBC_SHA uint16 = 0x000C + cipher_TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0x000D + cipher_TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x000E + cipher_TLS_DH_RSA_WITH_DES_CBC_SHA uint16 = 0x000F + cipher_TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x0010 + cipher_TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0011 + cipher_TLS_DHE_DSS_WITH_DES_CBC_SHA uint16 = 0x0012 + cipher_TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0x0013 + cipher_TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0014 + cipher_TLS_DHE_RSA_WITH_DES_CBC_SHA uint16 = 0x0015 + cipher_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x0016 + cipher_TLS_DH_anon_EXPORT_WITH_RC4_40_MD5 uint16 = 0x0017 + cipher_TLS_DH_anon_WITH_RC4_128_MD5 uint16 = 0x0018 + cipher_TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0019 + cipher_TLS_DH_anon_WITH_DES_CBC_SHA uint16 = 0x001A + cipher_TLS_DH_anon_WITH_3DES_EDE_CBC_SHA uint16 = 0x001B + // Reserved uint16 = 0x001C-1D + cipher_TLS_KRB5_WITH_DES_CBC_SHA uint16 = 0x001E + cipher_TLS_KRB5_WITH_3DES_EDE_CBC_SHA uint16 = 0x001F + cipher_TLS_KRB5_WITH_RC4_128_SHA uint16 = 0x0020 + cipher_TLS_KRB5_WITH_IDEA_CBC_SHA uint16 = 0x0021 + cipher_TLS_KRB5_WITH_DES_CBC_MD5 uint16 = 0x0022 + cipher_TLS_KRB5_WITH_3DES_EDE_CBC_MD5 uint16 = 0x0023 + cipher_TLS_KRB5_WITH_RC4_128_MD5 uint16 = 0x0024 + cipher_TLS_KRB5_WITH_IDEA_CBC_MD5 uint16 = 0x0025 + cipher_TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA uint16 = 0x0026 + cipher_TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA uint16 = 0x0027 + cipher_TLS_KRB5_EXPORT_WITH_RC4_40_SHA uint16 = 0x0028 + cipher_TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5 uint16 = 0x0029 + cipher_TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5 uint16 = 0x002A + cipher_TLS_KRB5_EXPORT_WITH_RC4_40_MD5 uint16 = 0x002B + cipher_TLS_PSK_WITH_NULL_SHA uint16 = 0x002C + cipher_TLS_DHE_PSK_WITH_NULL_SHA uint16 = 0x002D + cipher_TLS_RSA_PSK_WITH_NULL_SHA uint16 = 0x002E + cipher_TLS_RSA_WITH_AES_128_CBC_SHA uint16 = 0x002F + cipher_TLS_DH_DSS_WITH_AES_128_CBC_SHA uint16 = 0x0030 + cipher_TLS_DH_RSA_WITH_AES_128_CBC_SHA uint16 = 0x0031 + cipher_TLS_DHE_DSS_WITH_AES_128_CBC_SHA uint16 = 0x0032 + cipher_TLS_DHE_RSA_WITH_AES_128_CBC_SHA uint16 = 0x0033 + cipher_TLS_DH_anon_WITH_AES_128_CBC_SHA uint16 = 0x0034 + cipher_TLS_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0035 + cipher_TLS_DH_DSS_WITH_AES_256_CBC_SHA uint16 = 0x0036 + cipher_TLS_DH_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0037 + cipher_TLS_DHE_DSS_WITH_AES_256_CBC_SHA uint16 = 0x0038 + cipher_TLS_DHE_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0039 + cipher_TLS_DH_anon_WITH_AES_256_CBC_SHA uint16 = 0x003A + cipher_TLS_RSA_WITH_NULL_SHA256 uint16 = 0x003B + cipher_TLS_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x003C + cipher_TLS_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x003D + cipher_TLS_DH_DSS_WITH_AES_128_CBC_SHA256 uint16 = 0x003E + cipher_TLS_DH_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x003F + cipher_TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 uint16 = 0x0040 + cipher_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0041 + cipher_TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0042 + cipher_TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0043 + cipher_TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0044 + cipher_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0045 + cipher_TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0046 + // Reserved uint16 = 0x0047-4F + // Reserved uint16 = 0x0050-58 + // Reserved uint16 = 0x0059-5C + // Unassigned uint16 = 0x005D-5F + // Reserved uint16 = 0x0060-66 + cipher_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x0067 + cipher_TLS_DH_DSS_WITH_AES_256_CBC_SHA256 uint16 = 0x0068 + cipher_TLS_DH_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x0069 + cipher_TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 uint16 = 0x006A + cipher_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x006B + cipher_TLS_DH_anon_WITH_AES_128_CBC_SHA256 uint16 = 0x006C + cipher_TLS_DH_anon_WITH_AES_256_CBC_SHA256 uint16 = 0x006D + // Unassigned uint16 = 0x006E-83 + cipher_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0084 + cipher_TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0085 + cipher_TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0086 + cipher_TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0087 + cipher_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0088 + cipher_TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0089 + cipher_TLS_PSK_WITH_RC4_128_SHA uint16 = 0x008A + cipher_TLS_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x008B + cipher_TLS_PSK_WITH_AES_128_CBC_SHA uint16 = 0x008C + cipher_TLS_PSK_WITH_AES_256_CBC_SHA uint16 = 0x008D + cipher_TLS_DHE_PSK_WITH_RC4_128_SHA uint16 = 0x008E + cipher_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x008F + cipher_TLS_DHE_PSK_WITH_AES_128_CBC_SHA uint16 = 0x0090 + cipher_TLS_DHE_PSK_WITH_AES_256_CBC_SHA uint16 = 0x0091 + cipher_TLS_RSA_PSK_WITH_RC4_128_SHA uint16 = 0x0092 + cipher_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x0093 + cipher_TLS_RSA_PSK_WITH_AES_128_CBC_SHA uint16 = 0x0094 + cipher_TLS_RSA_PSK_WITH_AES_256_CBC_SHA uint16 = 0x0095 + cipher_TLS_RSA_WITH_SEED_CBC_SHA uint16 = 0x0096 + cipher_TLS_DH_DSS_WITH_SEED_CBC_SHA uint16 = 0x0097 + cipher_TLS_DH_RSA_WITH_SEED_CBC_SHA uint16 = 0x0098 + cipher_TLS_DHE_DSS_WITH_SEED_CBC_SHA uint16 = 0x0099 + cipher_TLS_DHE_RSA_WITH_SEED_CBC_SHA uint16 = 0x009A + cipher_TLS_DH_anon_WITH_SEED_CBC_SHA uint16 = 0x009B + cipher_TLS_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x009C + cipher_TLS_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x009D + cipher_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x009E + cipher_TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x009F + cipher_TLS_DH_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x00A0 + cipher_TLS_DH_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x00A1 + cipher_TLS_DHE_DSS_WITH_AES_128_GCM_SHA256 uint16 = 0x00A2 + cipher_TLS_DHE_DSS_WITH_AES_256_GCM_SHA384 uint16 = 0x00A3 + cipher_TLS_DH_DSS_WITH_AES_128_GCM_SHA256 uint16 = 0x00A4 + cipher_TLS_DH_DSS_WITH_AES_256_GCM_SHA384 uint16 = 0x00A5 + cipher_TLS_DH_anon_WITH_AES_128_GCM_SHA256 uint16 = 0x00A6 + cipher_TLS_DH_anon_WITH_AES_256_GCM_SHA384 uint16 = 0x00A7 + cipher_TLS_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00A8 + cipher_TLS_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00A9 + cipher_TLS_DHE_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00AA + cipher_TLS_DHE_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00AB + cipher_TLS_RSA_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00AC + cipher_TLS_RSA_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00AD + cipher_TLS_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00AE + cipher_TLS_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00AF + cipher_TLS_PSK_WITH_NULL_SHA256 uint16 = 0x00B0 + cipher_TLS_PSK_WITH_NULL_SHA384 uint16 = 0x00B1 + cipher_TLS_DHE_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00B2 + cipher_TLS_DHE_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00B3 + cipher_TLS_DHE_PSK_WITH_NULL_SHA256 uint16 = 0x00B4 + cipher_TLS_DHE_PSK_WITH_NULL_SHA384 uint16 = 0x00B5 + cipher_TLS_RSA_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00B6 + cipher_TLS_RSA_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00B7 + cipher_TLS_RSA_PSK_WITH_NULL_SHA256 uint16 = 0x00B8 + cipher_TLS_RSA_PSK_WITH_NULL_SHA384 uint16 = 0x00B9 + cipher_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BA + cipher_TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BB + cipher_TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BC + cipher_TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BD + cipher_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BE + cipher_TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BF + cipher_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C0 + cipher_TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C1 + cipher_TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C2 + cipher_TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C3 + cipher_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C4 + cipher_TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C5 + // Unassigned uint16 = 0x00C6-FE + cipher_TLS_EMPTY_RENEGOTIATION_INFO_SCSV uint16 = 0x00FF + // Unassigned uint16 = 0x01-55,* + cipher_TLS_FALLBACK_SCSV uint16 = 0x5600 + // Unassigned uint16 = 0x5601 - 0xC000 + cipher_TLS_ECDH_ECDSA_WITH_NULL_SHA uint16 = 0xC001 + cipher_TLS_ECDH_ECDSA_WITH_RC4_128_SHA uint16 = 0xC002 + cipher_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC003 + cipher_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA uint16 = 0xC004 + cipher_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA uint16 = 0xC005 + cipher_TLS_ECDHE_ECDSA_WITH_NULL_SHA uint16 = 0xC006 + cipher_TLS_ECDHE_ECDSA_WITH_RC4_128_SHA uint16 = 0xC007 + cipher_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC008 + cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA uint16 = 0xC009 + cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA uint16 = 0xC00A + cipher_TLS_ECDH_RSA_WITH_NULL_SHA uint16 = 0xC00B + cipher_TLS_ECDH_RSA_WITH_RC4_128_SHA uint16 = 0xC00C + cipher_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC00D + cipher_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC00E + cipher_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC00F + cipher_TLS_ECDHE_RSA_WITH_NULL_SHA uint16 = 0xC010 + cipher_TLS_ECDHE_RSA_WITH_RC4_128_SHA uint16 = 0xC011 + cipher_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC012 + cipher_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC013 + cipher_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC014 + cipher_TLS_ECDH_anon_WITH_NULL_SHA uint16 = 0xC015 + cipher_TLS_ECDH_anon_WITH_RC4_128_SHA uint16 = 0xC016 + cipher_TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA uint16 = 0xC017 + cipher_TLS_ECDH_anon_WITH_AES_128_CBC_SHA uint16 = 0xC018 + cipher_TLS_ECDH_anon_WITH_AES_256_CBC_SHA uint16 = 0xC019 + cipher_TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01A + cipher_TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01B + cipher_TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01C + cipher_TLS_SRP_SHA_WITH_AES_128_CBC_SHA uint16 = 0xC01D + cipher_TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC01E + cipher_TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA uint16 = 0xC01F + cipher_TLS_SRP_SHA_WITH_AES_256_CBC_SHA uint16 = 0xC020 + cipher_TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC021 + cipher_TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA uint16 = 0xC022 + cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC023 + cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC024 + cipher_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC025 + cipher_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC026 + cipher_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC027 + cipher_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC028 + cipher_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC029 + cipher_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC02A + cipher_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02B + cipher_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC02C + cipher_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02D + cipher_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC02E + cipher_TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02F + cipher_TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC030 + cipher_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC031 + cipher_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC032 + cipher_TLS_ECDHE_PSK_WITH_RC4_128_SHA uint16 = 0xC033 + cipher_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0xC034 + cipher_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA uint16 = 0xC035 + cipher_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA uint16 = 0xC036 + cipher_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0xC037 + cipher_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0xC038 + cipher_TLS_ECDHE_PSK_WITH_NULL_SHA uint16 = 0xC039 + cipher_TLS_ECDHE_PSK_WITH_NULL_SHA256 uint16 = 0xC03A + cipher_TLS_ECDHE_PSK_WITH_NULL_SHA384 uint16 = 0xC03B + cipher_TLS_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC03C + cipher_TLS_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC03D + cipher_TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC03E + cipher_TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC03F + cipher_TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC040 + cipher_TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC041 + cipher_TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC042 + cipher_TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC043 + cipher_TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC044 + cipher_TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC045 + cipher_TLS_DH_anon_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC046 + cipher_TLS_DH_anon_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC047 + cipher_TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC048 + cipher_TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC049 + cipher_TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04A + cipher_TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04B + cipher_TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04C + cipher_TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04D + cipher_TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04E + cipher_TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04F + cipher_TLS_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC050 + cipher_TLS_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC051 + cipher_TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC052 + cipher_TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC053 + cipher_TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC054 + cipher_TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC055 + cipher_TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC056 + cipher_TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC057 + cipher_TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC058 + cipher_TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC059 + cipher_TLS_DH_anon_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05A + cipher_TLS_DH_anon_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05B + cipher_TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05C + cipher_TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05D + cipher_TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05E + cipher_TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05F + cipher_TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC060 + cipher_TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC061 + cipher_TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC062 + cipher_TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC063 + cipher_TLS_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC064 + cipher_TLS_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC065 + cipher_TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC066 + cipher_TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC067 + cipher_TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC068 + cipher_TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC069 + cipher_TLS_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06A + cipher_TLS_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06B + cipher_TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06C + cipher_TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06D + cipher_TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06E + cipher_TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06F + cipher_TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC070 + cipher_TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC071 + cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC072 + cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC073 + cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC074 + cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC075 + cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC076 + cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC077 + cipher_TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC078 + cipher_TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC079 + cipher_TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07A + cipher_TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07B + cipher_TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07C + cipher_TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07D + cipher_TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07E + cipher_TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07F + cipher_TLS_DHE_DSS_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC080 + cipher_TLS_DHE_DSS_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC081 + cipher_TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC082 + cipher_TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC083 + cipher_TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC084 + cipher_TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC085 + cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC086 + cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC087 + cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC088 + cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC089 + cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08A + cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08B + cipher_TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08C + cipher_TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08D + cipher_TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08E + cipher_TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08F + cipher_TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC090 + cipher_TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC091 + cipher_TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC092 + cipher_TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC093 + cipher_TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC094 + cipher_TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC095 + cipher_TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC096 + cipher_TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC097 + cipher_TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC098 + cipher_TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC099 + cipher_TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC09A + cipher_TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC09B + cipher_TLS_RSA_WITH_AES_128_CCM uint16 = 0xC09C + cipher_TLS_RSA_WITH_AES_256_CCM uint16 = 0xC09D + cipher_TLS_DHE_RSA_WITH_AES_128_CCM uint16 = 0xC09E + cipher_TLS_DHE_RSA_WITH_AES_256_CCM uint16 = 0xC09F + cipher_TLS_RSA_WITH_AES_128_CCM_8 uint16 = 0xC0A0 + cipher_TLS_RSA_WITH_AES_256_CCM_8 uint16 = 0xC0A1 + cipher_TLS_DHE_RSA_WITH_AES_128_CCM_8 uint16 = 0xC0A2 + cipher_TLS_DHE_RSA_WITH_AES_256_CCM_8 uint16 = 0xC0A3 + cipher_TLS_PSK_WITH_AES_128_CCM uint16 = 0xC0A4 + cipher_TLS_PSK_WITH_AES_256_CCM uint16 = 0xC0A5 + cipher_TLS_DHE_PSK_WITH_AES_128_CCM uint16 = 0xC0A6 + cipher_TLS_DHE_PSK_WITH_AES_256_CCM uint16 = 0xC0A7 + cipher_TLS_PSK_WITH_AES_128_CCM_8 uint16 = 0xC0A8 + cipher_TLS_PSK_WITH_AES_256_CCM_8 uint16 = 0xC0A9 + cipher_TLS_PSK_DHE_WITH_AES_128_CCM_8 uint16 = 0xC0AA + cipher_TLS_PSK_DHE_WITH_AES_256_CCM_8 uint16 = 0xC0AB + cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CCM uint16 = 0xC0AC + cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CCM uint16 = 0xC0AD + cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8 uint16 = 0xC0AE + cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8 uint16 = 0xC0AF + // Unassigned uint16 = 0xC0B0-FF + // Unassigned uint16 = 0xC1-CB,* + // Unassigned uint16 = 0xCC00-A7 + cipher_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCA8 + cipher_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCA9 + cipher_TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCAA + cipher_TLS_PSK_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCAB + cipher_TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCAC + cipher_TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCAD + cipher_TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xCCAE +) + +// isBadCipher reports whether the cipher is blacklisted by the HTTP/2 spec. +// References: +// https://tools.ietf.org/html/rfc7540#appendix-A +// Reject cipher suites from Appendix A. +// "This list includes those cipher suites that do not +// offer an ephemeral key exchange and those that are +// based on the TLS null, stream or block cipher type" +func isBadCipher(cipher uint16) bool { + switch cipher { + case cipher_TLS_NULL_WITH_NULL_NULL, + cipher_TLS_RSA_WITH_NULL_MD5, + cipher_TLS_RSA_WITH_NULL_SHA, + cipher_TLS_RSA_EXPORT_WITH_RC4_40_MD5, + cipher_TLS_RSA_WITH_RC4_128_MD5, + cipher_TLS_RSA_WITH_RC4_128_SHA, + cipher_TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5, + cipher_TLS_RSA_WITH_IDEA_CBC_SHA, + cipher_TLS_RSA_EXPORT_WITH_DES40_CBC_SHA, + cipher_TLS_RSA_WITH_DES_CBC_SHA, + cipher_TLS_RSA_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA, + cipher_TLS_DH_DSS_WITH_DES_CBC_SHA, + cipher_TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA, + cipher_TLS_DH_RSA_WITH_DES_CBC_SHA, + cipher_TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA, + cipher_TLS_DHE_DSS_WITH_DES_CBC_SHA, + cipher_TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA, + cipher_TLS_DHE_RSA_WITH_DES_CBC_SHA, + cipher_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_DH_anon_EXPORT_WITH_RC4_40_MD5, + cipher_TLS_DH_anon_WITH_RC4_128_MD5, + cipher_TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA, + cipher_TLS_DH_anon_WITH_DES_CBC_SHA, + cipher_TLS_DH_anon_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_KRB5_WITH_DES_CBC_SHA, + cipher_TLS_KRB5_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_KRB5_WITH_RC4_128_SHA, + cipher_TLS_KRB5_WITH_IDEA_CBC_SHA, + cipher_TLS_KRB5_WITH_DES_CBC_MD5, + cipher_TLS_KRB5_WITH_3DES_EDE_CBC_MD5, + cipher_TLS_KRB5_WITH_RC4_128_MD5, + cipher_TLS_KRB5_WITH_IDEA_CBC_MD5, + cipher_TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA, + cipher_TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA, + cipher_TLS_KRB5_EXPORT_WITH_RC4_40_SHA, + cipher_TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5, + cipher_TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5, + cipher_TLS_KRB5_EXPORT_WITH_RC4_40_MD5, + cipher_TLS_PSK_WITH_NULL_SHA, + cipher_TLS_DHE_PSK_WITH_NULL_SHA, + cipher_TLS_RSA_PSK_WITH_NULL_SHA, + cipher_TLS_RSA_WITH_AES_128_CBC_SHA, + cipher_TLS_DH_DSS_WITH_AES_128_CBC_SHA, + cipher_TLS_DH_RSA_WITH_AES_128_CBC_SHA, + cipher_TLS_DHE_DSS_WITH_AES_128_CBC_SHA, + cipher_TLS_DHE_RSA_WITH_AES_128_CBC_SHA, + cipher_TLS_DH_anon_WITH_AES_128_CBC_SHA, + cipher_TLS_RSA_WITH_AES_256_CBC_SHA, + cipher_TLS_DH_DSS_WITH_AES_256_CBC_SHA, + cipher_TLS_DH_RSA_WITH_AES_256_CBC_SHA, + cipher_TLS_DHE_DSS_WITH_AES_256_CBC_SHA, + cipher_TLS_DHE_RSA_WITH_AES_256_CBC_SHA, + cipher_TLS_DH_anon_WITH_AES_256_CBC_SHA, + cipher_TLS_RSA_WITH_NULL_SHA256, + cipher_TLS_RSA_WITH_AES_128_CBC_SHA256, + cipher_TLS_RSA_WITH_AES_256_CBC_SHA256, + cipher_TLS_DH_DSS_WITH_AES_128_CBC_SHA256, + cipher_TLS_DH_RSA_WITH_AES_128_CBC_SHA256, + cipher_TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, + cipher_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA, + cipher_TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA, + cipher_TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA, + cipher_TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA, + cipher_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA, + cipher_TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA, + cipher_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, + cipher_TLS_DH_DSS_WITH_AES_256_CBC_SHA256, + cipher_TLS_DH_RSA_WITH_AES_256_CBC_SHA256, + cipher_TLS_DHE_DSS_WITH_AES_256_CBC_SHA256, + cipher_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, + cipher_TLS_DH_anon_WITH_AES_128_CBC_SHA256, + cipher_TLS_DH_anon_WITH_AES_256_CBC_SHA256, + cipher_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA, + cipher_TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA, + cipher_TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA, + cipher_TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA, + cipher_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA, + cipher_TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA, + cipher_TLS_PSK_WITH_RC4_128_SHA, + cipher_TLS_PSK_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_PSK_WITH_AES_128_CBC_SHA, + cipher_TLS_PSK_WITH_AES_256_CBC_SHA, + cipher_TLS_DHE_PSK_WITH_RC4_128_SHA, + cipher_TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_DHE_PSK_WITH_AES_128_CBC_SHA, + cipher_TLS_DHE_PSK_WITH_AES_256_CBC_SHA, + cipher_TLS_RSA_PSK_WITH_RC4_128_SHA, + cipher_TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_RSA_PSK_WITH_AES_128_CBC_SHA, + cipher_TLS_RSA_PSK_WITH_AES_256_CBC_SHA, + cipher_TLS_RSA_WITH_SEED_CBC_SHA, + cipher_TLS_DH_DSS_WITH_SEED_CBC_SHA, + cipher_TLS_DH_RSA_WITH_SEED_CBC_SHA, + cipher_TLS_DHE_DSS_WITH_SEED_CBC_SHA, + cipher_TLS_DHE_RSA_WITH_SEED_CBC_SHA, + cipher_TLS_DH_anon_WITH_SEED_CBC_SHA, + cipher_TLS_RSA_WITH_AES_128_GCM_SHA256, + cipher_TLS_RSA_WITH_AES_256_GCM_SHA384, + cipher_TLS_DH_RSA_WITH_AES_128_GCM_SHA256, + cipher_TLS_DH_RSA_WITH_AES_256_GCM_SHA384, + cipher_TLS_DH_DSS_WITH_AES_128_GCM_SHA256, + cipher_TLS_DH_DSS_WITH_AES_256_GCM_SHA384, + cipher_TLS_DH_anon_WITH_AES_128_GCM_SHA256, + cipher_TLS_DH_anon_WITH_AES_256_GCM_SHA384, + cipher_TLS_PSK_WITH_AES_128_GCM_SHA256, + cipher_TLS_PSK_WITH_AES_256_GCM_SHA384, + cipher_TLS_RSA_PSK_WITH_AES_128_GCM_SHA256, + cipher_TLS_RSA_PSK_WITH_AES_256_GCM_SHA384, + cipher_TLS_PSK_WITH_AES_128_CBC_SHA256, + cipher_TLS_PSK_WITH_AES_256_CBC_SHA384, + cipher_TLS_PSK_WITH_NULL_SHA256, + cipher_TLS_PSK_WITH_NULL_SHA384, + cipher_TLS_DHE_PSK_WITH_AES_128_CBC_SHA256, + cipher_TLS_DHE_PSK_WITH_AES_256_CBC_SHA384, + cipher_TLS_DHE_PSK_WITH_NULL_SHA256, + cipher_TLS_DHE_PSK_WITH_NULL_SHA384, + cipher_TLS_RSA_PSK_WITH_AES_128_CBC_SHA256, + cipher_TLS_RSA_PSK_WITH_AES_256_CBC_SHA384, + cipher_TLS_RSA_PSK_WITH_NULL_SHA256, + cipher_TLS_RSA_PSK_WITH_NULL_SHA384, + cipher_TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256, + cipher_TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256, + cipher_TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256, + cipher_TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256, + cipher_TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256, + cipher_TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256, + cipher_TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256, + cipher_TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256, + cipher_TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256, + cipher_TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256, + cipher_TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256, + cipher_TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256, + cipher_TLS_EMPTY_RENEGOTIATION_INFO_SCSV, + cipher_TLS_ECDH_ECDSA_WITH_NULL_SHA, + cipher_TLS_ECDH_ECDSA_WITH_RC4_128_SHA, + cipher_TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, + cipher_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, + cipher_TLS_ECDHE_ECDSA_WITH_NULL_SHA, + cipher_TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, + cipher_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + cipher_TLS_ECDH_RSA_WITH_NULL_SHA, + cipher_TLS_ECDH_RSA_WITH_RC4_128_SHA, + cipher_TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, + cipher_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, + cipher_TLS_ECDHE_RSA_WITH_NULL_SHA, + cipher_TLS_ECDHE_RSA_WITH_RC4_128_SHA, + cipher_TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + cipher_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + cipher_TLS_ECDH_anon_WITH_NULL_SHA, + cipher_TLS_ECDH_anon_WITH_RC4_128_SHA, + cipher_TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_ECDH_anon_WITH_AES_128_CBC_SHA, + cipher_TLS_ECDH_anon_WITH_AES_256_CBC_SHA, + cipher_TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_SRP_SHA_WITH_AES_128_CBC_SHA, + cipher_TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA, + cipher_TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA, + cipher_TLS_SRP_SHA_WITH_AES_256_CBC_SHA, + cipher_TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA, + cipher_TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA, + cipher_TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + cipher_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, + cipher_TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, + cipher_TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384, + cipher_TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + cipher_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, + cipher_TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, + cipher_TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384, + cipher_TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, + cipher_TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384, + cipher_TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, + cipher_TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384, + cipher_TLS_ECDHE_PSK_WITH_RC4_128_SHA, + cipher_TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA, + cipher_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA, + cipher_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA, + cipher_TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256, + cipher_TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384, + cipher_TLS_ECDHE_PSK_WITH_NULL_SHA, + cipher_TLS_ECDHE_PSK_WITH_NULL_SHA256, + cipher_TLS_ECDHE_PSK_WITH_NULL_SHA384, + cipher_TLS_RSA_WITH_ARIA_128_CBC_SHA256, + cipher_TLS_RSA_WITH_ARIA_256_CBC_SHA384, + cipher_TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256, + cipher_TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384, + cipher_TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256, + cipher_TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384, + cipher_TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256, + cipher_TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384, + cipher_TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256, + cipher_TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384, + cipher_TLS_DH_anon_WITH_ARIA_128_CBC_SHA256, + cipher_TLS_DH_anon_WITH_ARIA_256_CBC_SHA384, + cipher_TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256, + cipher_TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384, + cipher_TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256, + cipher_TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384, + cipher_TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256, + cipher_TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384, + cipher_TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256, + cipher_TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384, + cipher_TLS_RSA_WITH_ARIA_128_GCM_SHA256, + cipher_TLS_RSA_WITH_ARIA_256_GCM_SHA384, + cipher_TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256, + cipher_TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384, + cipher_TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256, + cipher_TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384, + cipher_TLS_DH_anon_WITH_ARIA_128_GCM_SHA256, + cipher_TLS_DH_anon_WITH_ARIA_256_GCM_SHA384, + cipher_TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256, + cipher_TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384, + cipher_TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256, + cipher_TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384, + cipher_TLS_PSK_WITH_ARIA_128_CBC_SHA256, + cipher_TLS_PSK_WITH_ARIA_256_CBC_SHA384, + cipher_TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256, + cipher_TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384, + cipher_TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256, + cipher_TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384, + cipher_TLS_PSK_WITH_ARIA_128_GCM_SHA256, + cipher_TLS_PSK_WITH_ARIA_256_GCM_SHA384, + cipher_TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256, + cipher_TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384, + cipher_TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256, + cipher_TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384, + cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256, + cipher_TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384, + cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256, + cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384, + cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256, + cipher_TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384, + cipher_TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256, + cipher_TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384, + cipher_TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256, + cipher_TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384, + cipher_TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256, + cipher_TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384, + cipher_TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256, + cipher_TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384, + cipher_TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256, + cipher_TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384, + cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256, + cipher_TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384, + cipher_TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256, + cipher_TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384, + cipher_TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256, + cipher_TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384, + cipher_TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256, + cipher_TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384, + cipher_TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256, + cipher_TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384, + cipher_TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256, + cipher_TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384, + cipher_TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256, + cipher_TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384, + cipher_TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256, + cipher_TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384, + cipher_TLS_RSA_WITH_AES_128_CCM, + cipher_TLS_RSA_WITH_AES_256_CCM, + cipher_TLS_RSA_WITH_AES_128_CCM_8, + cipher_TLS_RSA_WITH_AES_256_CCM_8, + cipher_TLS_PSK_WITH_AES_128_CCM, + cipher_TLS_PSK_WITH_AES_256_CCM, + cipher_TLS_PSK_WITH_AES_128_CCM_8, + cipher_TLS_PSK_WITH_AES_256_CCM_8: + return true + default: + return false + } +} diff --git a/backend/vendor/github.com/enetx/http2/client_conn_pool.go b/backend/vendor/github.com/enetx/http2/client_conn_pool.go new file mode 100644 index 0000000..d20971e --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/client_conn_pool.go @@ -0,0 +1,312 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Transport code's client connection pooling. + +package http2 + +import ( + "context" + "errors" + "net" + "sync" + + "github.com/enetx/http" +) + +// ClientConnPool manages a pool of HTTP/2 client connections. +type ClientConnPool interface { + // GetClientConn returns a specific HTTP/2 connection (usually + // a TLS-TCP connection) to an HTTP/2 server. On success, the + // returned ClientConn accounts for the upcoming RoundTrip + // call, so the caller should not omit it. If the caller needs + // to, ClientConn.RoundTrip can be called with a bogus + // new(http.Request) to release the stream reservation. + GetClientConn(req *http.Request, addr string) (*ClientConn, error) + MarkDead(*ClientConn) +} + +// clientConnPoolIdleCloser is the interface implemented by ClientConnPool +// implementations which can close their idle connections. +type clientConnPoolIdleCloser interface { + ClientConnPool + closeIdleConnections() +} + +var ( + _ clientConnPoolIdleCloser = (*clientConnPool)(nil) + _ clientConnPoolIdleCloser = noDialClientConnPool{} +) + +// TODO: use singleflight for dialing and addConnCalls? +type clientConnPool struct { + t *Transport + + mu sync.Mutex // TODO: maybe switch to RWMutex + // TODO: add support for sharing conns based on cert names + // (e.g. share conn for googleapis.com and appspot.com) + conns map[string][]*ClientConn // key is host:port + dialing map[string]*dialCall // currently in-flight dials + keys map[*ClientConn][]string + addConnCalls map[string]*addConnCall // in-flight addConnIfNeeded calls +} + +func (p *clientConnPool) GetClientConn(req *http.Request, addr string) (*ClientConn, error) { + return p.getClientConn(req, addr, dialOnMiss) +} + +const ( + dialOnMiss = true + noDialOnMiss = false +) + +func (p *clientConnPool) getClientConn(req *http.Request, addr string, dialOnMiss bool) (*ClientConn, error) { + // TODO(dneil): Dial a new connection when t.DisableKeepAlives is set? + if isConnectionCloseRequest(req) && dialOnMiss { + // It gets its own connection. + traceGetConn(req, addr) + const singleUse = true + cc, err := p.t.dialClientConn(req.Context(), addr, singleUse) + if err != nil { + return nil, err + } + return cc, nil + } + for { + p.mu.Lock() + for _, cc := range p.conns[addr] { + if cc.ReserveNewRequest() { + // When a connection is presented to us by the net/http package, + // the GetConn hook has already been called. + // Don't call it a second time here. + if !cc.getConnCalled { + traceGetConn(req, addr) + } + cc.getConnCalled = false + p.mu.Unlock() + return cc, nil + } + } + if !dialOnMiss { + p.mu.Unlock() + return nil, ErrNoCachedConn + } + traceGetConn(req, addr) + call := p.getStartDialLocked(req.Context(), addr) + p.mu.Unlock() + <-call.done + if shouldRetryDial(call, req) { + continue + } + cc, err := call.res, call.err + if err != nil { + return nil, err + } + if cc.ReserveNewRequest() { + return cc, nil + } + } +} + +// dialCall is an in-flight Transport dial call to a host. +type dialCall struct { + _ incomparable + p *clientConnPool + // the context associated with the request + // that created this dialCall + ctx context.Context + done chan struct{} // closed when done + res *ClientConn // valid after done is closed + err error // valid after done is closed +} + +// requires p.mu is held. +func (p *clientConnPool) getStartDialLocked(ctx context.Context, addr string) *dialCall { + if call, ok := p.dialing[addr]; ok { + // A dial is already in-flight. Don't start another. + return call + } + call := &dialCall{p: p, done: make(chan struct{}), ctx: ctx} + if p.dialing == nil { + p.dialing = make(map[string]*dialCall) + } + p.dialing[addr] = call + go call.dial(call.ctx, addr) + return call +} + +// run in its own goroutine. +func (c *dialCall) dial(ctx context.Context, addr string) { + const singleUse = false // shared conn + c.res, c.err = c.p.t.dialClientConn(ctx, addr, singleUse) + + c.p.mu.Lock() + delete(c.p.dialing, addr) + if c.err == nil { + c.p.addConnLocked(addr, c.res) + } + c.p.mu.Unlock() + + close(c.done) +} + +// addConnIfNeeded makes a NewClientConn out of c if a connection for key doesn't +// already exist. It coalesces concurrent calls with the same key. +// This is used by the http1 Transport code when it creates a new connection. Because +// the http1 Transport doesn't de-dup TCP dials to outbound hosts (because it doesn't know +// the protocol), it can get into a situation where it has multiple TLS connections. +// This code decides which ones live or die. +// The return value used is whether c was used. +// c is never closed. +func (p *clientConnPool) addConnIfNeeded(key string, t *Transport, c net.Conn) (used bool, err error) { + p.mu.Lock() + for _, cc := range p.conns[key] { + if cc.CanTakeNewRequest() { + p.mu.Unlock() + return false, nil + } + } + call, dup := p.addConnCalls[key] + if !dup { + if p.addConnCalls == nil { + p.addConnCalls = make(map[string]*addConnCall) + } + call = &addConnCall{ + p: p, + done: make(chan struct{}), + } + p.addConnCalls[key] = call + go call.run(t, key, c) + } + p.mu.Unlock() + + <-call.done + if call.err != nil { + return false, call.err + } + return !dup, nil +} + +type addConnCall struct { + _ incomparable + p *clientConnPool + done chan struct{} // closed when done + err error +} + +func (c *addConnCall) run(t *Transport, key string, nc net.Conn) { + cc, err := t.NewClientConn(nc) + + p := c.p + p.mu.Lock() + if err != nil { + c.err = err + } else { + cc.getConnCalled = true // already called by the net/http package + p.addConnLocked(key, cc) + } + delete(p.addConnCalls, key) + p.mu.Unlock() + close(c.done) +} + +// p.mu must be held +func (p *clientConnPool) addConnLocked(key string, cc *ClientConn) { + for _, v := range p.conns[key] { + if v == cc { + return + } + } + if p.conns == nil { + p.conns = make(map[string][]*ClientConn) + } + if p.keys == nil { + p.keys = make(map[*ClientConn][]string) + } + p.conns[key] = append(p.conns[key], cc) + p.keys[cc] = append(p.keys[cc], key) +} + +func (p *clientConnPool) MarkDead(cc *ClientConn) { + p.mu.Lock() + defer p.mu.Unlock() + for _, key := range p.keys[cc] { + vv, ok := p.conns[key] + if !ok { + continue + } + newList := filterOutClientConn(vv, cc) + if len(newList) > 0 { + p.conns[key] = newList + } else { + delete(p.conns, key) + } + } + delete(p.keys, cc) +} + +func (p *clientConnPool) closeIdleConnections() { + p.mu.Lock() + defer p.mu.Unlock() + // TODO: don't close a cc if it was just added to the pool + // milliseconds ago and has never been used. There's currently + // a small race window with the HTTP/1 Transport's integration + // where it can add an idle conn just before using it, and + // somebody else can concurrently call CloseIdleConns and + // break some caller's RoundTrip. + for _, vv := range p.conns { + for _, cc := range vv { + cc.closeIfIdle() + } + } +} + +func filterOutClientConn(in []*ClientConn, exclude *ClientConn) []*ClientConn { + out := in[:0] + for _, v := range in { + if v != exclude { + out = append(out, v) + } + } + // If we filtered it out, zero out the last item to prevent + // the GC from seeing it. + if len(in) != len(out) { + in[len(in)-1] = nil + } + return out +} + +// noDialClientConnPool is an implementation of http2.ClientConnPool +// which never dials. We let the HTTP/1.1 client dial and use its TLS +// connection instead. +type noDialClientConnPool struct{ *clientConnPool } + +func (p noDialClientConnPool) GetClientConn(req *http.Request, addr string) (*ClientConn, error) { + return p.getClientConn(req, addr, noDialOnMiss) +} + +// shouldRetryDial reports whether the current request should +// retry dialing after the call finished unsuccessfully, for example +// if the dial was canceled because of a context cancellation or +// deadline expiry. +func shouldRetryDial(call *dialCall, req *http.Request) bool { + if call.err == nil { + // No error, no need to retry + return false + } + if call.ctx == req.Context() { + // If the call has the same context as the request, the dial + // should not be retried, since any cancellation will have come + // from this request. + return false + } + if !errors.Is(call.err, context.Canceled) && !errors.Is(call.err, context.DeadlineExceeded) { + // If the call error is not because of a context cancellation or a deadline expiry, + // the dial should not be retried. + return false + } + // Only retry if the error is a context cancellation error or deadline expiry + // and the context associated with the call was canceled or expired. + return call.ctx.Err() != nil +} diff --git a/backend/vendor/github.com/enetx/http2/config.go b/backend/vendor/github.com/enetx/http2/config.go new file mode 100644 index 0000000..442ea8a --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/config.go @@ -0,0 +1,170 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "math" + "time" + + "github.com/enetx/http" +) + +// http2Config is a package-internal version of net/http.HTTP2Config. +// +// http.HTTP2Config was added in Go 1.24. +// When running with a version of net/http that includes HTTP2Config, +// we merge the configuration with the fields in Transport or Server +// to produce an http2Config. +// +// Zero valued fields in http2Config are interpreted as in the +// net/http.HTTPConfig documentation. +// +// Precedence order for reconciling configurations is: +// +// - Use the net/http.{Server,Transport}.HTTP2Config value, when non-zero. +// - Otherwise use the http2.{Server.Transport} value. +// - If the resulting value is zero or out of range, use a default. +type http2Config struct { + MaxConcurrentStreams uint32 + StrictMaxConcurrentRequests bool + MaxDecoderHeaderTableSize uint32 + MaxEncoderHeaderTableSize uint32 + MaxReadFrameSize uint32 + MaxUploadBufferPerConnection int32 + MaxUploadBufferPerStream int32 + SendPingTimeout time.Duration + PingTimeout time.Duration + WriteByteTimeout time.Duration + PermitProhibitedCipherSuites bool + CountError func(errType string) +} + +// configFromServer merges configuration settings from +// net/http.Server.HTTP2Config and http2.Server. +func configFromServer(h1 *http.Server, h2 *Server) http2Config { + conf := http2Config{ + MaxConcurrentStreams: h2.MaxConcurrentStreams, + MaxEncoderHeaderTableSize: h2.MaxEncoderHeaderTableSize, + MaxDecoderHeaderTableSize: h2.MaxDecoderHeaderTableSize, + MaxReadFrameSize: h2.MaxReadFrameSize, + MaxUploadBufferPerConnection: h2.MaxUploadBufferPerConnection, + MaxUploadBufferPerStream: h2.MaxUploadBufferPerStream, + SendPingTimeout: h2.ReadIdleTimeout, + PingTimeout: h2.PingTimeout, + WriteByteTimeout: h2.WriteByteTimeout, + PermitProhibitedCipherSuites: h2.PermitProhibitedCipherSuites, + CountError: h2.CountError, + } + fillNetHTTPConfig(&conf, h1.HTTP2) + setConfigDefaults(&conf, true) + return conf +} + +// configFromTransport merges configuration settings from h2 and h2.t1.HTTP2 +// (the net/http Transport). +func configFromTransport(h2 *Transport) http2Config { + conf := http2Config{ + StrictMaxConcurrentRequests: h2.StrictMaxConcurrentStreams, + MaxEncoderHeaderTableSize: h2.MaxEncoderHeaderTableSize, + MaxDecoderHeaderTableSize: h2.MaxDecoderHeaderTableSize, + MaxReadFrameSize: h2.MaxReadFrameSize, + SendPingTimeout: h2.ReadIdleTimeout, + PingTimeout: h2.PingTimeout, + WriteByteTimeout: h2.WriteByteTimeout, + } + + // Unlike most config fields, where out-of-range values revert to the default, + // Transport.MaxReadFrameSize clips. + if conf.MaxReadFrameSize < minMaxFrameSize { + conf.MaxReadFrameSize = minMaxFrameSize + } else if conf.MaxReadFrameSize > maxFrameSize { + conf.MaxReadFrameSize = maxFrameSize + } + + if h2.t1 != nil { + fillNetHTTPConfig(&conf, h2.t1.HTTP2) + } + setConfigDefaults(&conf, false) + return conf +} + +func setDefault[T ~int | ~int32 | ~uint32 | ~int64](v *T, minval, maxval, defval T) { + if *v < minval || *v > maxval { + *v = defval + } +} + +func setConfigDefaults(conf *http2Config, server bool) { + setDefault(&conf.MaxConcurrentStreams, 1, math.MaxUint32, defaultMaxStreams) + setDefault(&conf.MaxEncoderHeaderTableSize, 1, math.MaxUint32, initialHeaderTableSize) + setDefault(&conf.MaxDecoderHeaderTableSize, 1, math.MaxUint32, initialHeaderTableSize) + if server { + setDefault(&conf.MaxUploadBufferPerConnection, initialWindowSize, math.MaxInt32, 1<<20) + } else { + setDefault(&conf.MaxUploadBufferPerConnection, initialWindowSize, math.MaxInt32, transportDefaultConnFlow) + } + if server { + setDefault(&conf.MaxUploadBufferPerStream, 1, math.MaxInt32, 1<<20) + } else { + setDefault(&conf.MaxUploadBufferPerStream, 1, math.MaxInt32, transportDefaultStreamFlow) + } + setDefault(&conf.MaxReadFrameSize, minMaxFrameSize, maxFrameSize, defaultMaxReadFrameSize) + setDefault(&conf.PingTimeout, 1, math.MaxInt64, 15*time.Second) +} + +// adjustHTTP1MaxHeaderSize converts a limit in bytes on the size of an HTTP/1 header +// to an HTTP/2 MAX_HEADER_LIST_SIZE value. +func adjustHTTP1MaxHeaderSize(n int64) int64 { + // http2's count is in a slightly different unit and includes 32 bytes per pair. + // So, take the net/http.Server value and pad it up a bit, assuming 10 headers. + const perFieldOverhead = 32 // per http2 spec + const typicalHeaders = 10 // conservative + return n + typicalHeaders*perFieldOverhead +} + +func fillNetHTTPConfig(conf *http2Config, h2 *http.HTTP2Config) { + if h2 == nil { + return + } + if h2.MaxConcurrentStreams != 0 { + conf.MaxConcurrentStreams = uint32(h2.MaxConcurrentStreams) + } + if http2ConfigStrictMaxConcurrentRequests(h2) { + conf.StrictMaxConcurrentRequests = true + } + if h2.MaxEncoderHeaderTableSize != 0 { + conf.MaxEncoderHeaderTableSize = uint32(h2.MaxEncoderHeaderTableSize) + } + if h2.MaxDecoderHeaderTableSize != 0 { + conf.MaxDecoderHeaderTableSize = uint32(h2.MaxDecoderHeaderTableSize) + } + if h2.MaxConcurrentStreams != 0 { + conf.MaxConcurrentStreams = uint32(h2.MaxConcurrentStreams) + } + if h2.MaxReadFrameSize != 0 { + conf.MaxReadFrameSize = uint32(h2.MaxReadFrameSize) + } + if h2.MaxReceiveBufferPerConnection != 0 { + conf.MaxUploadBufferPerConnection = int32(h2.MaxReceiveBufferPerConnection) + } + if h2.MaxReceiveBufferPerStream != 0 { + conf.MaxUploadBufferPerStream = int32(h2.MaxReceiveBufferPerStream) + } + if h2.SendPingTimeout != 0 { + conf.SendPingTimeout = h2.SendPingTimeout + } + if h2.PingTimeout != 0 { + conf.PingTimeout = h2.PingTimeout + } + if h2.WriteByteTimeout != 0 { + conf.WriteByteTimeout = h2.WriteByteTimeout + } + if h2.PermitProhibitedCipherSuites { + conf.PermitProhibitedCipherSuites = true + } + if h2.CountError != nil { + conf.CountError = h2.CountError + } +} diff --git a/backend/vendor/github.com/enetx/http2/config_go125.go b/backend/vendor/github.com/enetx/http2/config_go125.go new file mode 100644 index 0000000..a7c59a5 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/config_go125.go @@ -0,0 +1,15 @@ +// Copyright 2025 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build !go1.26 + +package http2 + +import ( + "github.com/enetx/http" +) + +func http2ConfigStrictMaxConcurrentRequests(h2 *http.HTTP2Config) bool { + return false +} diff --git a/backend/vendor/github.com/enetx/http2/config_go126.go b/backend/vendor/github.com/enetx/http2/config_go126.go new file mode 100644 index 0000000..470cba1 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/config_go126.go @@ -0,0 +1,15 @@ +// Copyright 2025 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build go1.26 + +package http2 + +import ( + "github.com/enetx/http" +) + +func http2ConfigStrictMaxConcurrentRequests(h2 *http.HTTP2Config) bool { + return h2.StrictMaxConcurrentRequests +} diff --git a/backend/vendor/github.com/enetx/http2/databuffer.go b/backend/vendor/github.com/enetx/http2/databuffer.go new file mode 100644 index 0000000..e6f55cb --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/databuffer.go @@ -0,0 +1,149 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "errors" + "fmt" + "sync" +) + +// Buffer chunks are allocated from a pool to reduce pressure on GC. +// The maximum wasted space per dataBuffer is 2x the largest size class, +// which happens when the dataBuffer has multiple chunks and there is +// one unread byte in both the first and last chunks. We use a few size +// classes to minimize overheads for servers that typically receive very +// small request bodies. +// +// TODO: Benchmark to determine if the pools are necessary. The GC may have +// improved enough that we can instead allocate chunks like this: +// make([]byte, max(16<<10, expectedBytesRemaining)) +var dataChunkPools = [...]sync.Pool{ + {New: func() interface{} { return new([1 << 10]byte) }}, + {New: func() interface{} { return new([2 << 10]byte) }}, + {New: func() interface{} { return new([4 << 10]byte) }}, + {New: func() interface{} { return new([8 << 10]byte) }}, + {New: func() interface{} { return new([16 << 10]byte) }}, +} + +func getDataBufferChunk(size int64) []byte { + switch { + case size <= 1<<10: + return dataChunkPools[0].Get().(*[1 << 10]byte)[:] + case size <= 2<<10: + return dataChunkPools[1].Get().(*[2 << 10]byte)[:] + case size <= 4<<10: + return dataChunkPools[2].Get().(*[4 << 10]byte)[:] + case size <= 8<<10: + return dataChunkPools[3].Get().(*[8 << 10]byte)[:] + default: + return dataChunkPools[4].Get().(*[16 << 10]byte)[:] + } +} + +func putDataBufferChunk(p []byte) { + switch len(p) { + case 1 << 10: + dataChunkPools[0].Put((*[1 << 10]byte)(p)) + case 2 << 10: + dataChunkPools[1].Put((*[2 << 10]byte)(p)) + case 4 << 10: + dataChunkPools[2].Put((*[4 << 10]byte)(p)) + case 8 << 10: + dataChunkPools[3].Put((*[8 << 10]byte)(p)) + case 16 << 10: + dataChunkPools[4].Put((*[16 << 10]byte)(p)) + default: + panic(fmt.Sprintf("unexpected buffer len=%v", len(p))) + } +} + +// dataBuffer is an io.ReadWriter backed by a list of data chunks. +// Each dataBuffer is used to read DATA frames on a single stream. +// The buffer is divided into chunks so the server can limit the +// total memory used by a single connection without limiting the +// request body size on any single stream. +type dataBuffer struct { + chunks [][]byte + r int // next byte to read is chunks[0][r] + w int // next byte to write is chunks[len(chunks)-1][w] + size int // total buffered bytes + expected int64 // we expect at least this many bytes in future Write calls (ignored if <= 0) +} + +var errReadEmpty = errors.New("read from empty dataBuffer") + +// Read copies bytes from the buffer into p. +// It is an error to read when no data is available. +func (b *dataBuffer) Read(p []byte) (int, error) { + if b.size == 0 { + return 0, errReadEmpty + } + var ntotal int + for len(p) > 0 && b.size > 0 { + readFrom := b.bytesFromFirstChunk() + n := copy(p, readFrom) + p = p[n:] + ntotal += n + b.r += n + b.size -= n + // If the first chunk has been consumed, advance to the next chunk. + if b.r == len(b.chunks[0]) { + putDataBufferChunk(b.chunks[0]) + end := len(b.chunks) - 1 + copy(b.chunks[:end], b.chunks[1:]) + b.chunks[end] = nil + b.chunks = b.chunks[:end] + b.r = 0 + } + } + return ntotal, nil +} + +func (b *dataBuffer) bytesFromFirstChunk() []byte { + if len(b.chunks) == 1 { + return b.chunks[0][b.r:b.w] + } + return b.chunks[0][b.r:] +} + +// Len returns the number of bytes of the unread portion of the buffer. +func (b *dataBuffer) Len() int { + return b.size +} + +// Write appends p to the buffer. +func (b *dataBuffer) Write(p []byte) (int, error) { + ntotal := len(p) + for len(p) > 0 { + // If the last chunk is empty, allocate a new chunk. Try to allocate + // enough to fully copy p plus any additional bytes we expect to + // receive. However, this may allocate less than len(p). + want := int64(len(p)) + if b.expected > want { + want = b.expected + } + chunk := b.lastChunkOrAlloc(want) + n := copy(chunk[b.w:], p) + p = p[n:] + b.w += n + b.size += n + b.expected -= int64(n) + } + return ntotal, nil +} + +func (b *dataBuffer) lastChunkOrAlloc(want int64) []byte { + if len(b.chunks) != 0 { + last := b.chunks[len(b.chunks)-1] + if b.w < len(last) { + return last + } + } + chunk := getDataBufferChunk(want) + b.chunks = append(b.chunks, chunk) + b.w = 0 + return chunk +} diff --git a/backend/vendor/github.com/enetx/http2/errors.go b/backend/vendor/github.com/enetx/http2/errors.go new file mode 100644 index 0000000..f2067da --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/errors.go @@ -0,0 +1,145 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "errors" + "fmt" +) + +// An ErrCode is an unsigned 32-bit error code as defined in the HTTP/2 spec. +type ErrCode uint32 + +const ( + ErrCodeNo ErrCode = 0x0 + ErrCodeProtocol ErrCode = 0x1 + ErrCodeInternal ErrCode = 0x2 + ErrCodeFlowControl ErrCode = 0x3 + ErrCodeSettingsTimeout ErrCode = 0x4 + ErrCodeStreamClosed ErrCode = 0x5 + ErrCodeFrameSize ErrCode = 0x6 + ErrCodeRefusedStream ErrCode = 0x7 + ErrCodeCancel ErrCode = 0x8 + ErrCodeCompression ErrCode = 0x9 + ErrCodeConnect ErrCode = 0xa + ErrCodeEnhanceYourCalm ErrCode = 0xb + ErrCodeInadequateSecurity ErrCode = 0xc + ErrCodeHTTP11Required ErrCode = 0xd +) + +var errCodeName = map[ErrCode]string{ + ErrCodeNo: "NO_ERROR", + ErrCodeProtocol: "PROTOCOL_ERROR", + ErrCodeInternal: "INTERNAL_ERROR", + ErrCodeFlowControl: "FLOW_CONTROL_ERROR", + ErrCodeSettingsTimeout: "SETTINGS_TIMEOUT", + ErrCodeStreamClosed: "STREAM_CLOSED", + ErrCodeFrameSize: "FRAME_SIZE_ERROR", + ErrCodeRefusedStream: "REFUSED_STREAM", + ErrCodeCancel: "CANCEL", + ErrCodeCompression: "COMPRESSION_ERROR", + ErrCodeConnect: "CONNECT_ERROR", + ErrCodeEnhanceYourCalm: "ENHANCE_YOUR_CALM", + ErrCodeInadequateSecurity: "INADEQUATE_SECURITY", + ErrCodeHTTP11Required: "HTTP_1_1_REQUIRED", +} + +func (e ErrCode) String() string { + if s, ok := errCodeName[e]; ok { + return s + } + return fmt.Sprintf("unknown error code 0x%x", uint32(e)) +} + +func (e ErrCode) stringToken() string { + if s, ok := errCodeName[e]; ok { + return s + } + return fmt.Sprintf("ERR_UNKNOWN_%d", uint32(e)) +} + +// ConnectionError is an error that results in the termination of the +// entire connection. +type ConnectionError ErrCode + +func (e ConnectionError) Error() string { return fmt.Sprintf("connection error: %s", ErrCode(e)) } + +// StreamError is an error that only affects one stream within an +// HTTP/2 connection. +type StreamError struct { + StreamID uint32 + Code ErrCode + Cause error // optional additional detail +} + +// errFromPeer is a sentinel error value for StreamError.Cause to +// indicate that the StreamError was sent from the peer over the wire +// and wasn't locally generated in the Transport. +var errFromPeer = errors.New("received from peer") + +func streamError(id uint32, code ErrCode) StreamError { + return StreamError{StreamID: id, Code: code} +} + +func (e StreamError) Error() string { + if e.Cause != nil { + return fmt.Sprintf("stream error: stream ID %d; %v; %v", e.StreamID, e.Code, e.Cause) + } + return fmt.Sprintf("stream error: stream ID %d; %v", e.StreamID, e.Code) +} + +// 6.9.1 The Flow Control Window +// "If a sender receives a WINDOW_UPDATE that causes a flow control +// window to exceed this maximum it MUST terminate either the stream +// or the connection, as appropriate. For streams, [...]; for the +// connection, a GOAWAY frame with a FLOW_CONTROL_ERROR code." +type goAwayFlowError struct{} + +func (goAwayFlowError) Error() string { return "connection exceeded flow control window size" } + +// connError represents an HTTP/2 ConnectionError error code, along +// with a string (for debugging) explaining why. +// +// Errors of this type are only returned by the frame parser functions +// and converted into ConnectionError(Code), after stashing away +// the Reason into the Framer's errDetail field, accessible via +// the (*Framer).ErrorDetail method. +type connError struct { + Code ErrCode // the ConnectionError error code + Reason string // additional reason +} + +func (e connError) Error() string { + return fmt.Sprintf("http2: connection error: %v: %v", e.Code, e.Reason) +} + +type pseudoHeaderError string + +func (e pseudoHeaderError) Error() string { + return fmt.Sprintf("invalid pseudo-header %q", string(e)) +} + +type duplicatePseudoHeaderError string + +func (e duplicatePseudoHeaderError) Error() string { + return fmt.Sprintf("duplicate pseudo-header %q", string(e)) +} + +type headerFieldNameError string + +func (e headerFieldNameError) Error() string { + return fmt.Sprintf("invalid header field name %q", string(e)) +} + +type headerFieldValueError string + +func (e headerFieldValueError) Error() string { + return fmt.Sprintf("invalid header field value for %q", string(e)) +} + +var ( + errMixPseudoHeaderTypes = errors.New("mix of request and response pseudo headers") + errPseudoAfterRegular = errors.New("pseudo header field after regular") +) diff --git a/backend/vendor/github.com/enetx/http2/flow.go b/backend/vendor/github.com/enetx/http2/flow.go new file mode 100644 index 0000000..b7dbd18 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/flow.go @@ -0,0 +1,120 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Flow control + +package http2 + +// inflowMinRefresh is the minimum number of bytes we'll send for a +// flow control window update. +const inflowMinRefresh = 4 << 10 + +// inflow accounts for an inbound flow control window. +// It tracks both the latest window sent to the peer (used for enforcement) +// and the accumulated unsent window. +type inflow struct { + avail int32 + unsent int32 +} + +// init sets the initial window. +func (f *inflow) init(n int32) { + f.avail = n +} + +// add adds n bytes to the window, with a maximum window size of max, +// indicating that the peer can now send us more data. +// For example, the user read from a {Request,Response} body and consumed +// some of the buffered data, so the peer can now send more. +// It returns the number of bytes to send in a WINDOW_UPDATE frame to the peer. +// Window updates are accumulated and sent when the unsent capacity +// is at least inflowMinRefresh or will at least double the peer's available window. +func (f *inflow) add(n int) (connAdd int32) { + if n < 0 { + panic("negative update") + } + unsent := int64(f.unsent) + int64(n) + // "A sender MUST NOT allow a flow-control window to exceed 2^31-1 octets." + // RFC 7540 Section 6.9.1. + const maxWindow = 1<<31 - 1 + if unsent+int64(f.avail) > maxWindow { + panic("flow control update exceeds maximum window size") + } + f.unsent = int32(unsent) + if f.unsent < inflowMinRefresh && f.unsent < f.avail { + // If there aren't at least inflowMinRefresh bytes of window to send, + // and this update won't at least double the window, buffer the update for later. + return 0 + } + f.avail += f.unsent + f.unsent = 0 + return int32(unsent) +} + +// take attempts to take n bytes from the peer's flow control window. +// It reports whether the window has available capacity. +func (f *inflow) take(n uint32) bool { + if n > uint32(f.avail) { + return false + } + f.avail -= int32(n) + return true +} + +// takeInflows attempts to take n bytes from two inflows, +// typically connection-level and stream-level flows. +// It reports whether both windows have available capacity. +func takeInflows(f1, f2 *inflow, n uint32) bool { + if n > uint32(f1.avail) || n > uint32(f2.avail) { + return false + } + f1.avail -= int32(n) + f2.avail -= int32(n) + return true +} + +// outflow is the outbound flow control window's size. +type outflow struct { + _ incomparable + + // n is the number of DATA bytes we're allowed to send. + // An outflow is kept both on a conn and a per-stream. + n int32 + + // conn points to the shared connection-level outflow that is + // shared by all streams on that conn. It is nil for the outflow + // that's on the conn directly. + conn *outflow +} + +func (f *outflow) setConnFlow(cf *outflow) { f.conn = cf } + +func (f *outflow) available() int32 { + n := f.n + if f.conn != nil && f.conn.n < n { + n = f.conn.n + } + return n +} + +func (f *outflow) take(n int32) { + if n > f.available() { + panic("internal error: took too much") + } + f.n -= n + if f.conn != nil { + f.conn.n -= n + } +} + +// add adds n bytes (positive or negative) to the flow control window. +// It returns false if the sum would exceed 2^31-1. +func (f *outflow) add(n int32) bool { + sum := f.n + n + if (sum > n) == (f.n > 0) { + f.n = sum + return true + } + return false +} diff --git a/backend/vendor/github.com/enetx/http2/frame.go b/backend/vendor/github.com/enetx/http2/frame.go new file mode 100644 index 0000000..93bcaab --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/frame.go @@ -0,0 +1,1725 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "bytes" + "encoding/binary" + "errors" + "fmt" + "io" + "log" + "strings" + "sync" + + "golang.org/x/net/http/httpguts" + "golang.org/x/net/http2/hpack" +) + +const frameHeaderLen = 9 + +var padZeros = make([]byte, 255) // zeros for padding + +// A FrameType is a registered frame type as defined in +// https://httpwg.org/specs/rfc7540.html#rfc.section.11.2 +type FrameType uint8 + +const ( + FrameData FrameType = 0x0 + FrameHeaders FrameType = 0x1 + FramePriority FrameType = 0x2 + FrameRSTStream FrameType = 0x3 + FrameSettings FrameType = 0x4 + FramePushPromise FrameType = 0x5 + FramePing FrameType = 0x6 + FrameGoAway FrameType = 0x7 + FrameWindowUpdate FrameType = 0x8 + FrameContinuation FrameType = 0x9 +) + +var frameNames = [...]string{ + FrameData: "DATA", + FrameHeaders: "HEADERS", + FramePriority: "PRIORITY", + FrameRSTStream: "RST_STREAM", + FrameSettings: "SETTINGS", + FramePushPromise: "PUSH_PROMISE", + FramePing: "PING", + FrameGoAway: "GOAWAY", + FrameWindowUpdate: "WINDOW_UPDATE", + FrameContinuation: "CONTINUATION", +} + +func (t FrameType) String() string { + if int(t) < len(frameNames) { + return frameNames[t] + } + return fmt.Sprintf("UNKNOWN_FRAME_TYPE_%d", t) +} + +// Flags is a bitmask of HTTP/2 flags. +// The meaning of flags varies depending on the frame type. +type Flags uint8 + +// Has reports whether f contains all (0 or more) flags in v. +func (f Flags) Has(v Flags) bool { + return (f & v) == v +} + +// Frame-specific FrameHeader flag bits. +const ( + // Data Frame + FlagDataEndStream Flags = 0x1 + FlagDataPadded Flags = 0x8 + + // Headers Frame + FlagHeadersEndStream Flags = 0x1 + FlagHeadersEndHeaders Flags = 0x4 + FlagHeadersPadded Flags = 0x8 + FlagHeadersPriority Flags = 0x20 + + // Settings Frame + FlagSettingsAck Flags = 0x1 + + // Ping Frame + FlagPingAck Flags = 0x1 + + // Continuation Frame + FlagContinuationEndHeaders Flags = 0x4 + + FlagPushPromiseEndHeaders Flags = 0x4 + FlagPushPromisePadded Flags = 0x8 +) + +var flagName = map[FrameType]map[Flags]string{ + FrameData: { + FlagDataEndStream: "END_STREAM", + FlagDataPadded: "PADDED", + }, + FrameHeaders: { + FlagHeadersEndStream: "END_STREAM", + FlagHeadersEndHeaders: "END_HEADERS", + FlagHeadersPadded: "PADDED", + FlagHeadersPriority: "PRIORITY", + }, + FrameSettings: { + FlagSettingsAck: "ACK", + }, + FramePing: { + FlagPingAck: "ACK", + }, + FrameContinuation: { + FlagContinuationEndHeaders: "END_HEADERS", + }, + FramePushPromise: { + FlagPushPromiseEndHeaders: "END_HEADERS", + FlagPushPromisePadded: "PADDED", + }, +} + +// a frameParser parses a frame given its FrameHeader and payload +// bytes. The length of payload will always equal fh.Length (which +// might be 0). +type frameParser func(fc *frameCache, fh FrameHeader, countError func(string), payload []byte) (Frame, error) + +var frameParsers = [...]frameParser{ + FrameData: parseDataFrame, + FrameHeaders: parseHeadersFrame, + FramePriority: parsePriorityFrame, + FrameRSTStream: parseRSTStreamFrame, + FrameSettings: parseSettingsFrame, + FramePushPromise: parsePushPromise, + FramePing: parsePingFrame, + FrameGoAway: parseGoAwayFrame, + FrameWindowUpdate: parseWindowUpdateFrame, + FrameContinuation: parseContinuationFrame, +} + +func typeFrameParser(t FrameType) frameParser { + if int(t) < len(frameParsers) { + return frameParsers[t] + } + return parseUnknownFrame +} + +// A FrameHeader is the 9 byte header of all HTTP/2 frames. +// +// See https://httpwg.org/specs/rfc7540.html#FrameHeader +type FrameHeader struct { + valid bool // caller can access []byte fields in the Frame + + // Type is the 1 byte frame type. There are ten standard frame + // types, but extension frame types may be written by WriteRawFrame + // and will be returned by ReadFrame (as UnknownFrame). + Type FrameType + + // Flags are the 1 byte of 8 potential bit flags per frame. + // They are specific to the frame type. + Flags Flags + + // Length is the length of the frame, not including the 9 byte header. + // The maximum size is one byte less than 16MB (uint24), but only + // frames up to 16KB are allowed without peer agreement. + Length uint32 + + // StreamID is which stream this frame is for. Certain frames + // are not stream-specific, in which case this field is 0. + StreamID uint32 +} + +// Header returns h. It exists so FrameHeaders can be embedded in other +// specific frame types and implement the Frame interface. +func (h FrameHeader) Header() FrameHeader { return h } + +func (h FrameHeader) String() string { + var buf bytes.Buffer + buf.WriteString("[FrameHeader ") + h.writeDebug(&buf) + buf.WriteByte(']') + return buf.String() +} + +func (h FrameHeader) writeDebug(buf *bytes.Buffer) { + buf.WriteString(h.Type.String()) + if h.Flags != 0 { + buf.WriteString(" flags=") + set := 0 + for i := uint8(0); i < 8; i++ { + if h.Flags&(1< 1 { + buf.WriteByte('|') + } + name := flagName[h.Type][Flags(1<>24), + byte(streamID>>16), + byte(streamID>>8), + byte(streamID)) +} + +func (f *Framer) endWrite() error { + // Now that we know the final size, fill in the FrameHeader in + // the space previously reserved for it. Abuse append. + length := len(f.wbuf) - frameHeaderLen + if length >= (1 << 24) { + return ErrFrameTooLarge + } + _ = append(f.wbuf[:0], + byte(length>>16), + byte(length>>8), + byte(length)) + if f.logWrites { + f.logWrite() + } + + n, err := f.w.Write(f.wbuf) + if err == nil && n != len(f.wbuf) { + err = io.ErrShortWrite + } + return err +} + +func (f *Framer) logWrite() { + if f.debugFramer == nil { + f.debugFramerBuf = new(bytes.Buffer) + f.debugFramer = NewFramer(nil, f.debugFramerBuf) + f.debugFramer.logReads = false // we log it ourselves, saying "wrote" below + // Let us read anything, even if we accidentally wrote it + // in the wrong order: + f.debugFramer.AllowIllegalReads = true + } + f.debugFramerBuf.Write(f.wbuf) + fr, err := f.debugFramer.ReadFrame() + if err != nil { + f.debugWriteLoggerf("http2: Framer %p: failed to decode just-written frame", f) + return + } + f.debugWriteLoggerf("http2: Framer %p: wrote %v", f, summarizeFrame(fr)) +} + +func (f *Framer) writeByte(v byte) { f.wbuf = append(f.wbuf, v) } +func (f *Framer) writeBytes(v []byte) { f.wbuf = append(f.wbuf, v...) } +func (f *Framer) writeUint16(v uint16) { f.wbuf = append(f.wbuf, byte(v>>8), byte(v)) } +func (f *Framer) writeUint32(v uint32) { + f.wbuf = append(f.wbuf, byte(v>>24), byte(v>>16), byte(v>>8), byte(v)) +} + +const ( + minMaxFrameSize = 1 << 14 + maxFrameSize = 1<<24 - 1 +) + +// SetReuseFrames allows the Framer to reuse Frames. +// If called on a Framer, Frames returned by calls to ReadFrame are only +// valid until the next call to ReadFrame. +func (fr *Framer) SetReuseFrames() { + if fr.frameCache != nil { + return + } + fr.frameCache = &frameCache{} +} + +type frameCache struct { + dataFrame DataFrame +} + +func (fc *frameCache) getDataFrame() *DataFrame { + if fc == nil { + return &DataFrame{} + } + return &fc.dataFrame +} + +// NewFramer returns a Framer that writes frames to w and reads them from r. +func NewFramer(w io.Writer, r io.Reader) *Framer { + fr := &Framer{ + w: w, + r: r, + countError: func(string) {}, + logReads: logFrameReads, + logWrites: logFrameWrites, + debugReadLoggerf: log.Printf, + debugWriteLoggerf: log.Printf, + } + fr.getReadBuf = func(size uint32) []byte { + if cap(fr.readBuf) >= int(size) { + return fr.readBuf[:size] + } + fr.readBuf = make([]byte, size) + return fr.readBuf + } + fr.SetMaxReadFrameSize(maxFrameSize) + return fr +} + +// SetMaxReadFrameSize sets the maximum size of a frame +// that will be read by a subsequent call to ReadFrame. +// It is the caller's responsibility to advertise this +// limit with a SETTINGS frame. +func (fr *Framer) SetMaxReadFrameSize(v uint32) { + if v > maxFrameSize { + v = maxFrameSize + } + fr.maxReadSize = v +} + +// ErrorDetail returns a more detailed error of the last error +// returned by Framer.ReadFrame. For instance, if ReadFrame +// returns a StreamError with code PROTOCOL_ERROR, ErrorDetail +// will say exactly what was invalid. ErrorDetail is not guaranteed +// to return a non-nil value and like the rest of the http2 package, +// its return value is not protected by an API compatibility promise. +// ErrorDetail is reset after the next call to ReadFrame. +func (fr *Framer) ErrorDetail() error { + return fr.errDetail +} + +// ErrFrameTooLarge is returned from Framer.ReadFrame when the peer +// sends a frame that is larger than declared with SetMaxReadFrameSize. +var ErrFrameTooLarge = errors.New("http2: frame too large") + +// terminalReadFrameError reports whether err is an unrecoverable +// error from ReadFrame and no other frames should be read. +func terminalReadFrameError(err error) bool { + if _, ok := err.(StreamError); ok { + return false + } + return err != nil +} + +// ReadFrame reads a single frame. The returned Frame is only valid +// until the next call to ReadFrame. +// +// If the frame is larger than previously set with SetMaxReadFrameSize, the +// returned error is ErrFrameTooLarge. Other errors may be of type +// ConnectionError, StreamError, or anything else from the underlying +// reader. +// +// If ReadFrame returns an error and a non-nil Frame, the Frame's StreamID +// indicates the stream responsible for the error. +func (fr *Framer) ReadFrame() (Frame, error) { + fr.errDetail = nil + if fr.lastFrame != nil { + fr.lastFrame.invalidate() + } + fh, err := readFrameHeader(fr.headerBuf[:], fr.r) + if err != nil { + return nil, err + } + if fh.Length > fr.maxReadSize { + if fh == invalidHTTP1LookingFrameHeader() { + return nil, fmt.Errorf("http2: failed reading the frame payload: %w, note that the frame header looked like an HTTP/1.1 header", ErrFrameTooLarge) + } + return nil, ErrFrameTooLarge + } + payload := fr.getReadBuf(fh.Length) + if _, err := io.ReadFull(fr.r, payload); err != nil { + if fh == invalidHTTP1LookingFrameHeader() { + return nil, fmt.Errorf("http2: failed reading the frame payload: %w, note that the frame header looked like an HTTP/1.1 header", err) + } + return nil, err + } + f, err := typeFrameParser(fh.Type)(fr.frameCache, fh, fr.countError, payload) + if err != nil { + if ce, ok := err.(connError); ok { + return nil, fr.connError(ce.Code, ce.Reason) + } + return nil, err + } + if err := fr.checkFrameOrder(f); err != nil { + return nil, err + } + if fr.logReads { + fr.debugReadLoggerf("http2: Framer %p: read %v", fr, summarizeFrame(f)) + } + if fh.Type == FrameHeaders && fr.ReadMetaHeaders != nil { + return fr.readMetaFrame(f.(*HeadersFrame)) + } + return f, nil +} + +// connError returns ConnectionError(code) but first +// stashes away a public reason to the caller can optionally relay it +// to the peer before hanging up on them. This might help others debug +// their implementations. +func (fr *Framer) connError(code ErrCode, reason string) error { + fr.errDetail = errors.New(reason) + return ConnectionError(code) +} + +// checkFrameOrder reports an error if f is an invalid frame to return +// next from ReadFrame. Mostly it checks whether HEADERS and +// CONTINUATION frames are contiguous. +func (fr *Framer) checkFrameOrder(f Frame) error { + last := fr.lastFrame + fr.lastFrame = f + if fr.AllowIllegalReads { + return nil + } + + fh := f.Header() + if fr.lastHeaderStream != 0 { + if fh.Type != FrameContinuation { + return fr.connError(ErrCodeProtocol, + fmt.Sprintf("got %s for stream %d; expected CONTINUATION following %s for stream %d", + fh.Type, fh.StreamID, + last.Header().Type, fr.lastHeaderStream)) + } + if fh.StreamID != fr.lastHeaderStream { + return fr.connError(ErrCodeProtocol, + fmt.Sprintf("got CONTINUATION for stream %d; expected stream %d", + fh.StreamID, fr.lastHeaderStream)) + } + } else if fh.Type == FrameContinuation { + return fr.connError(ErrCodeProtocol, fmt.Sprintf("unexpected CONTINUATION for stream %d", fh.StreamID)) + } + + switch fh.Type { + case FrameHeaders, FrameContinuation: + if fh.Flags.Has(FlagHeadersEndHeaders) { + fr.lastHeaderStream = 0 + } else { + fr.lastHeaderStream = fh.StreamID + } + } + + return nil +} + +// A DataFrame conveys arbitrary, variable-length sequences of octets +// associated with a stream. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.1 +type DataFrame struct { + FrameHeader + data []byte +} + +func (f *DataFrame) StreamEnded() bool { + return f.FrameHeader.Flags.Has(FlagDataEndStream) +} + +// Data returns the frame's data octets, not including any padding +// size byte or padding suffix bytes. +// The caller must not retain the returned memory past the next +// call to ReadFrame. +func (f *DataFrame) Data() []byte { + f.checkValid() + return f.data +} + +func parseDataFrame(fc *frameCache, fh FrameHeader, countError func(string), payload []byte) (Frame, error) { + if fh.StreamID == 0 { + // DATA frames MUST be associated with a stream. If a + // DATA frame is received whose stream identifier + // field is 0x0, the recipient MUST respond with a + // connection error (Section 5.4.1) of type + // PROTOCOL_ERROR. + countError("frame_data_stream_0") + return nil, connError{ErrCodeProtocol, "DATA frame with stream ID 0"} + } + f := fc.getDataFrame() + f.FrameHeader = fh + + var padSize byte + if fh.Flags.Has(FlagDataPadded) { + var err error + payload, padSize, err = readByte(payload) + if err != nil { + countError("frame_data_pad_byte_short") + return nil, err + } + } + if int(padSize) > len(payload) { + // If the length of the padding is greater than the + // length of the frame payload, the recipient MUST + // treat this as a connection error. + // Filed: https://github.com/http2/http2-spec/issues/610 + countError("frame_data_pad_too_big") + return nil, connError{ErrCodeProtocol, "pad size larger than data payload"} + } + f.data = payload[:len(payload)-int(padSize)] + return f, nil +} + +var ( + errStreamID = errors.New("invalid stream ID") + errDepStreamID = errors.New("invalid dependent stream ID") + errPadLength = errors.New("pad length too large") + errPadBytes = errors.New("padding bytes must all be zeros unless AllowIllegalWrites is enabled") +) + +func validStreamIDOrZero(streamID uint32) bool { + return streamID&(1<<31) == 0 +} + +func validStreamID(streamID uint32) bool { + return streamID != 0 && streamID&(1<<31) == 0 +} + +// WriteData writes a DATA frame. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility not to violate the maximum frame size +// and to not call other Write methods concurrently. +func (f *Framer) WriteData(streamID uint32, endStream bool, data []byte) error { + return f.WriteDataPadded(streamID, endStream, data, nil) +} + +// WriteDataPadded writes a DATA frame with optional padding. +// +// If pad is nil, the padding bit is not sent. +// The length of pad must not exceed 255 bytes. +// The bytes of pad must all be zero, unless f.AllowIllegalWrites is set. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility not to violate the maximum frame size +// and to not call other Write methods concurrently. +func (f *Framer) WriteDataPadded(streamID uint32, endStream bool, data, pad []byte) error { + if err := f.startWriteDataPadded(streamID, endStream, data, pad); err != nil { + return err + } + return f.endWrite() +} + +// startWriteDataPadded is WriteDataPadded, but only writes the frame to the Framer's internal buffer. +// The caller should call endWrite to flush the frame to the underlying writer. +func (f *Framer) startWriteDataPadded(streamID uint32, endStream bool, data, pad []byte) error { + if !validStreamID(streamID) && !f.AllowIllegalWrites { + return errStreamID + } + if len(pad) > 0 { + if len(pad) > 255 { + return errPadLength + } + if !f.AllowIllegalWrites { + for _, b := range pad { + if b != 0 { + // "Padding octets MUST be set to zero when sending." + return errPadBytes + } + } + } + } + var flags Flags + if endStream { + flags |= FlagDataEndStream + } + if pad != nil { + flags |= FlagDataPadded + } + f.startWrite(FrameData, flags, streamID) + if pad != nil { + f.wbuf = append(f.wbuf, byte(len(pad))) + } + f.wbuf = append(f.wbuf, data...) + f.wbuf = append(f.wbuf, pad...) + return nil +} + +// A SettingsFrame conveys configuration parameters that affect how +// endpoints communicate, such as preferences and constraints on peer +// behavior. +// +// See https://httpwg.org/specs/rfc7540.html#SETTINGS +type SettingsFrame struct { + FrameHeader + p []byte +} + +func parseSettingsFrame(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (Frame, error) { + if fh.Flags.Has(FlagSettingsAck) && fh.Length > 0 { + // When this (ACK 0x1) bit is set, the payload of the + // SETTINGS frame MUST be empty. Receipt of a + // SETTINGS frame with the ACK flag set and a length + // field value other than 0 MUST be treated as a + // connection error (Section 5.4.1) of type + // FRAME_SIZE_ERROR. + countError("frame_settings_ack_with_length") + return nil, ConnectionError(ErrCodeFrameSize) + } + if fh.StreamID != 0 { + // SETTINGS frames always apply to a connection, + // never a single stream. The stream identifier for a + // SETTINGS frame MUST be zero (0x0). If an endpoint + // receives a SETTINGS frame whose stream identifier + // field is anything other than 0x0, the endpoint MUST + // respond with a connection error (Section 5.4.1) of + // type PROTOCOL_ERROR. + countError("frame_settings_has_stream") + return nil, ConnectionError(ErrCodeProtocol) + } + if len(p)%6 != 0 { + countError("frame_settings_mod_6") + // Expecting even number of 6 byte settings. + return nil, ConnectionError(ErrCodeFrameSize) + } + f := &SettingsFrame{FrameHeader: fh, p: p} + if v, ok := f.Value(SettingInitialWindowSize); ok && v > (1<<31)-1 { + countError("frame_settings_window_size_too_big") + // Values above the maximum flow control window size of 2^31 - 1 MUST + // be treated as a connection error (Section 5.4.1) of type + // FLOW_CONTROL_ERROR. + return nil, ConnectionError(ErrCodeFlowControl) + } + return f, nil +} + +func (f *SettingsFrame) IsAck() bool { + return f.FrameHeader.Flags.Has(FlagSettingsAck) +} + +func (f *SettingsFrame) Value(id SettingID) (v uint32, ok bool) { + f.checkValid() + for i := 0; i < f.NumSettings(); i++ { + if s := f.Setting(i); s.ID == id { + return s.Val, true + } + } + return 0, false +} + +// Setting returns the setting from the frame at the given 0-based index. +// The index must be >= 0 and less than f.NumSettings(). +func (f *SettingsFrame) Setting(i int) Setting { + buf := f.p + return Setting{ + ID: SettingID(binary.BigEndian.Uint16(buf[i*6 : i*6+2])), + Val: binary.BigEndian.Uint32(buf[i*6+2 : i*6+6]), + } +} + +func (f *SettingsFrame) NumSettings() int { return len(f.p) / 6 } + +// HasDuplicates reports whether f contains any duplicate setting IDs. +func (f *SettingsFrame) HasDuplicates() bool { + num := f.NumSettings() + if num == 0 { + return false + } + // If it's small enough (the common case), just do the n^2 + // thing and avoid a map allocation. + if num < 10 { + for i := 0; i < num; i++ { + idi := f.Setting(i).ID + for j := i + 1; j < num; j++ { + idj := f.Setting(j).ID + if idi == idj { + return true + } + } + } + return false + } + seen := map[SettingID]bool{} + for i := 0; i < num; i++ { + id := f.Setting(i).ID + if seen[id] { + return true + } + seen[id] = true + } + return false +} + +// ForeachSetting runs fn for each setting. +// It stops and returns the first error. +func (f *SettingsFrame) ForeachSetting(fn func(Setting) error) error { + f.checkValid() + for i := 0; i < f.NumSettings(); i++ { + if err := fn(f.Setting(i)); err != nil { + return err + } + } + return nil +} + +// WriteSettings writes a SETTINGS frame with zero or more settings +// specified and the ACK bit not set. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *Framer) WriteSettings(settings ...Setting) error { + f.startWrite(FrameSettings, 0, 0) + for _, s := range settings { + f.writeUint16(uint16(s.ID)) + f.writeUint32(s.Val) + } + return f.endWrite() +} + +// WriteSettingsAck writes an empty SETTINGS frame with the ACK bit set. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *Framer) WriteSettingsAck() error { + f.startWrite(FrameSettings, FlagSettingsAck, 0) + return f.endWrite() +} + +// A PingFrame is a mechanism for measuring a minimal round trip time +// from the sender, as well as determining whether an idle connection +// is still functional. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.7 +type PingFrame struct { + FrameHeader + Data [8]byte +} + +func (f *PingFrame) IsAck() bool { return f.Flags.Has(FlagPingAck) } + +func parsePingFrame(_ *frameCache, fh FrameHeader, countError func(string), payload []byte) (Frame, error) { + if len(payload) != 8 { + countError("frame_ping_length") + return nil, ConnectionError(ErrCodeFrameSize) + } + if fh.StreamID != 0 { + countError("frame_ping_has_stream") + return nil, ConnectionError(ErrCodeProtocol) + } + f := &PingFrame{FrameHeader: fh} + copy(f.Data[:], payload) + return f, nil +} + +func (f *Framer) WritePing(ack bool, data [8]byte) error { + var flags Flags + if ack { + flags = FlagPingAck + } + f.startWrite(FramePing, flags, 0) + f.writeBytes(data[:]) + return f.endWrite() +} + +// A GoAwayFrame informs the remote peer to stop creating streams on this connection. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.8 +type GoAwayFrame struct { + FrameHeader + LastStreamID uint32 + ErrCode ErrCode + debugData []byte +} + +// DebugData returns any debug data in the GOAWAY frame. Its contents +// are not defined. +// The caller must not retain the returned memory past the next +// call to ReadFrame. +func (f *GoAwayFrame) DebugData() []byte { + f.checkValid() + return f.debugData +} + +func parseGoAwayFrame(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (Frame, error) { + if fh.StreamID != 0 { + countError("frame_goaway_has_stream") + return nil, ConnectionError(ErrCodeProtocol) + } + if len(p) < 8 { + countError("frame_goaway_short") + return nil, ConnectionError(ErrCodeFrameSize) + } + return &GoAwayFrame{ + FrameHeader: fh, + LastStreamID: binary.BigEndian.Uint32(p[:4]) & (1<<31 - 1), + ErrCode: ErrCode(binary.BigEndian.Uint32(p[4:8])), + debugData: p[8:], + }, nil +} + +func (f *Framer) WriteGoAway(maxStreamID uint32, code ErrCode, debugData []byte) error { + f.startWrite(FrameGoAway, 0, 0) + f.writeUint32(maxStreamID & (1<<31 - 1)) + f.writeUint32(uint32(code)) + f.writeBytes(debugData) + return f.endWrite() +} + +// An UnknownFrame is the frame type returned when the frame type is unknown +// or no specific frame type parser exists. +type UnknownFrame struct { + FrameHeader + p []byte +} + +// Payload returns the frame's payload (after the header). It is not +// valid to call this method after a subsequent call to +// Framer.ReadFrame, nor is it valid to retain the returned slice. +// The memory is owned by the Framer and is invalidated when the next +// frame is read. +func (f *UnknownFrame) Payload() []byte { + f.checkValid() + return f.p +} + +func parseUnknownFrame(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (Frame, error) { + return &UnknownFrame{fh, p}, nil +} + +// A WindowUpdateFrame is used to implement flow control. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.9 +type WindowUpdateFrame struct { + FrameHeader + Increment uint32 // never read with high bit set +} + +func parseWindowUpdateFrame(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (Frame, error) { + if len(p) != 4 { + countError("frame_windowupdate_bad_len") + return nil, ConnectionError(ErrCodeFrameSize) + } + inc := binary.BigEndian.Uint32(p[:4]) & 0x7fffffff // mask off high reserved bit + if inc == 0 { + // A receiver MUST treat the receipt of a + // WINDOW_UPDATE frame with an flow control window + // increment of 0 as a stream error (Section 5.4.2) of + // type PROTOCOL_ERROR; errors on the connection flow + // control window MUST be treated as a connection + // error (Section 5.4.1). + if fh.StreamID == 0 { + countError("frame_windowupdate_zero_inc_conn") + return nil, ConnectionError(ErrCodeProtocol) + } + countError("frame_windowupdate_zero_inc_stream") + return nil, streamError(fh.StreamID, ErrCodeProtocol) + } + return &WindowUpdateFrame{ + FrameHeader: fh, + Increment: inc, + }, nil +} + +// WriteWindowUpdate writes a WINDOW_UPDATE frame. +// The increment value must be between 1 and 2,147,483,647, inclusive. +// If the Stream ID is zero, the window update applies to the +// connection as a whole. +func (f *Framer) WriteWindowUpdate(streamID, incr uint32) error { + // "The legal range for the increment to the flow control window is 1 to 2^31-1 (2,147,483,647) octets." + if (incr < 1 || incr > 2147483647) && !f.AllowIllegalWrites { + return errors.New("illegal window increment value") + } + f.startWrite(FrameWindowUpdate, 0, streamID) + f.writeUint32(incr) + return f.endWrite() +} + +// A HeadersFrame is used to open a stream and additionally carries a +// header block fragment. +type HeadersFrame struct { + FrameHeader + + // Priority is set if FlagHeadersPriority is set in the FrameHeader. + Priority PriorityParam + + headerFragBuf []byte // not owned +} + +func (f *HeadersFrame) HeaderBlockFragment() []byte { + f.checkValid() + return f.headerFragBuf +} + +func (f *HeadersFrame) HeadersEnded() bool { + return f.FrameHeader.Flags.Has(FlagHeadersEndHeaders) +} + +func (f *HeadersFrame) StreamEnded() bool { + return f.FrameHeader.Flags.Has(FlagHeadersEndStream) +} + +func (f *HeadersFrame) HasPriority() bool { + return f.FrameHeader.Flags.Has(FlagHeadersPriority) +} + +func parseHeadersFrame(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (_ Frame, err error) { + hf := &HeadersFrame{ + FrameHeader: fh, + } + if fh.StreamID == 0 { + // HEADERS frames MUST be associated with a stream. If a HEADERS frame + // is received whose stream identifier field is 0x0, the recipient MUST + // respond with a connection error (Section 5.4.1) of type + // PROTOCOL_ERROR. + countError("frame_headers_zero_stream") + return nil, connError{ErrCodeProtocol, "HEADERS frame with stream ID 0"} + } + var padLength uint8 + if fh.Flags.Has(FlagHeadersPadded) { + if p, padLength, err = readByte(p); err != nil { + countError("frame_headers_pad_short") + return + } + } + if fh.Flags.Has(FlagHeadersPriority) { + var v uint32 + p, v, err = readUint32(p) + if err != nil { + countError("frame_headers_prio_short") + return nil, err + } + hf.Priority.StreamDep = v & 0x7fffffff + hf.Priority.Exclusive = (v != hf.Priority.StreamDep) // high bit was set + p, hf.Priority.Weight, err = readByte(p) + if err != nil { + countError("frame_headers_prio_weight_short") + return nil, err + } + } + if len(p)-int(padLength) < 0 { + countError("frame_headers_pad_too_big") + return nil, streamError(fh.StreamID, ErrCodeProtocol) + } + hf.headerFragBuf = p[:len(p)-int(padLength)] + return hf, nil +} + +// HeadersFrameParam are the parameters for writing a HEADERS frame. +type HeadersFrameParam struct { + // StreamID is the required Stream ID to initiate. + StreamID uint32 + // BlockFragment is part (or all) of a Header Block. + BlockFragment []byte + + // EndStream indicates that the header block is the last that + // the endpoint will send for the identified stream. Setting + // this flag causes the stream to enter one of "half closed" + // states. + EndStream bool + + // EndHeaders indicates that this frame contains an entire + // header block and is not followed by any + // CONTINUATION frames. + EndHeaders bool + + // PadLength is the optional number of bytes of zeros to add + // to this frame. + PadLength uint8 + + // Priority, if non-zero, includes stream priority information + // in the HEADER frame. + Priority PriorityParam +} + +// WriteHeaders writes a single HEADERS frame. +// +// This is a low-level header writing method. Encoding headers and +// splitting them into any necessary CONTINUATION frames is handled +// elsewhere. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *Framer) WriteHeaders(p HeadersFrameParam) error { + if !validStreamID(p.StreamID) && !f.AllowIllegalWrites { + return errStreamID + } + var flags Flags + if p.PadLength != 0 { + flags |= FlagHeadersPadded + } + if p.EndStream { + flags |= FlagHeadersEndStream + } + if p.EndHeaders { + flags |= FlagHeadersEndHeaders + } + if !p.Priority.IsZero() { + flags |= FlagHeadersPriority + } + f.startWrite(FrameHeaders, flags, p.StreamID) + if p.PadLength != 0 { + f.writeByte(p.PadLength) + } + if !p.Priority.IsZero() { + v := p.Priority.StreamDep + if !validStreamIDOrZero(v) && !f.AllowIllegalWrites { + return errDepStreamID + } + if p.Priority.Exclusive { + v |= 1 << 31 + } + f.writeUint32(v) + f.writeByte(p.Priority.Weight) + } + f.wbuf = append(f.wbuf, p.BlockFragment...) + f.wbuf = append(f.wbuf, padZeros[:p.PadLength]...) + return f.endWrite() +} + +// A PriorityFrame specifies the sender-advised priority of a stream. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.3 +type PriorityFrame struct { + FrameHeader + PriorityParam +} + +var defaultRFC9218Priority = PriorityParam{ + incremental: 0, + urgency: 3, +} + +// Note that HTTP/2 has had two different prioritization schemes, and +// PriorityParam struct below is a superset of both schemes. The exported +// symbols are from RFC 7540 and the non-exported ones are from RFC 9218. + +// PriorityParam are the stream prioritzation parameters. +type PriorityParam struct { + // StreamDep is a 31-bit stream identifier for the + // stream that this stream depends on. Zero means no + // dependency. + StreamDep uint32 + + // Exclusive is whether the dependency is exclusive. + Exclusive bool + + // Weight is the stream's zero-indexed weight. It should be + // set together with StreamDep, or neither should be set. Per + // the spec, "Add one to the value to obtain a weight between + // 1 and 256." + Weight uint8 + + // "The urgency (u) parameter value is Integer (see Section 3.3.1 of + // [STRUCTURED-FIELDS]), between 0 and 7 inclusive, in descending order of + // priority. The default is 3." + urgency uint8 + + // "The incremental (i) parameter value is Boolean (see Section 3.3.6 of + // [STRUCTURED-FIELDS]). It indicates if an HTTP response can be processed + // incrementally, i.e., provide some meaningful output as chunks of the + // response arrive." + // + // We use uint8 (i.e. 0 is false, 1 is true) instead of bool so we can + // avoid unnecessary type conversions and because either type takes 1 byte. + incremental uint8 +} + +func (p PriorityParam) IsZero() bool { + return p == PriorityParam{} +} + +func parsePriorityFrame(_ *frameCache, fh FrameHeader, countError func(string), payload []byte) (Frame, error) { + if fh.StreamID == 0 { + countError("frame_priority_zero_stream") + return nil, connError{ErrCodeProtocol, "PRIORITY frame with stream ID 0"} + } + if len(payload) != 5 { + countError("frame_priority_bad_length") + return nil, connError{ErrCodeFrameSize, fmt.Sprintf("PRIORITY frame payload size was %d; want 5", len(payload))} + } + v := binary.BigEndian.Uint32(payload[:4]) + streamID := v & 0x7fffffff // mask off high bit + return &PriorityFrame{ + FrameHeader: fh, + PriorityParam: PriorityParam{ + Weight: payload[4], + StreamDep: streamID, + Exclusive: streamID != v, // was high bit set? + }, + }, nil +} + +// WritePriority writes a PRIORITY frame. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *Framer) WritePriority(streamID uint32, p PriorityParam) error { + if !validStreamID(streamID) && !f.AllowIllegalWrites { + return errStreamID + } + if !validStreamIDOrZero(p.StreamDep) { + return errDepStreamID + } + f.startWrite(FramePriority, 0, streamID) + v := p.StreamDep + if p.Exclusive { + v |= 1 << 31 + } + f.writeUint32(v) + f.writeByte(p.Weight) + return f.endWrite() +} + +// A RSTStreamFrame allows for abnormal termination of a stream. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.4 +type RSTStreamFrame struct { + FrameHeader + ErrCode ErrCode +} + +func parseRSTStreamFrame(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (Frame, error) { + if len(p) != 4 { + countError("frame_rststream_bad_len") + return nil, ConnectionError(ErrCodeFrameSize) + } + if fh.StreamID == 0 { + countError("frame_rststream_zero_stream") + return nil, ConnectionError(ErrCodeProtocol) + } + return &RSTStreamFrame{fh, ErrCode(binary.BigEndian.Uint32(p[:4]))}, nil +} + +// WriteRSTStream writes a RST_STREAM frame. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *Framer) WriteRSTStream(streamID uint32, code ErrCode) error { + if !validStreamID(streamID) && !f.AllowIllegalWrites { + return errStreamID + } + f.startWrite(FrameRSTStream, 0, streamID) + f.writeUint32(uint32(code)) + return f.endWrite() +} + +// A ContinuationFrame is used to continue a sequence of header block fragments. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.10 +type ContinuationFrame struct { + FrameHeader + headerFragBuf []byte +} + +func parseContinuationFrame(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (Frame, error) { + if fh.StreamID == 0 { + countError("frame_continuation_zero_stream") + return nil, connError{ErrCodeProtocol, "CONTINUATION frame with stream ID 0"} + } + return &ContinuationFrame{fh, p}, nil +} + +func (f *ContinuationFrame) HeaderBlockFragment() []byte { + f.checkValid() + return f.headerFragBuf +} + +func (f *ContinuationFrame) HeadersEnded() bool { + return f.FrameHeader.Flags.Has(FlagContinuationEndHeaders) +} + +// WriteContinuation writes a CONTINUATION frame. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *Framer) WriteContinuation(streamID uint32, endHeaders bool, headerBlockFragment []byte) error { + if !validStreamID(streamID) && !f.AllowIllegalWrites { + return errStreamID + } + var flags Flags + if endHeaders { + flags |= FlagContinuationEndHeaders + } + f.startWrite(FrameContinuation, flags, streamID) + f.wbuf = append(f.wbuf, headerBlockFragment...) + return f.endWrite() +} + +// A PushPromiseFrame is used to initiate a server stream. +// See https://httpwg.org/specs/rfc7540.html#rfc.section.6.6 +type PushPromiseFrame struct { + FrameHeader + PromiseID uint32 + headerFragBuf []byte // not owned +} + +func (f *PushPromiseFrame) HeaderBlockFragment() []byte { + f.checkValid() + return f.headerFragBuf +} + +func (f *PushPromiseFrame) HeadersEnded() bool { + return f.FrameHeader.Flags.Has(FlagPushPromiseEndHeaders) +} + +func parsePushPromise(_ *frameCache, fh FrameHeader, countError func(string), p []byte) (_ Frame, err error) { + pp := &PushPromiseFrame{ + FrameHeader: fh, + } + if pp.StreamID == 0 { + // PUSH_PROMISE frames MUST be associated with an existing, + // peer-initiated stream. The stream identifier of a + // PUSH_PROMISE frame indicates the stream it is associated + // with. If the stream identifier field specifies the value + // 0x0, a recipient MUST respond with a connection error + // (Section 5.4.1) of type PROTOCOL_ERROR. + countError("frame_pushpromise_zero_stream") + return nil, ConnectionError(ErrCodeProtocol) + } + // The PUSH_PROMISE frame includes optional padding. + // Padding fields and flags are identical to those defined for DATA frames + var padLength uint8 + if fh.Flags.Has(FlagPushPromisePadded) { + if p, padLength, err = readByte(p); err != nil { + countError("frame_pushpromise_pad_short") + return + } + } + + p, pp.PromiseID, err = readUint32(p) + if err != nil { + countError("frame_pushpromise_promiseid_short") + return + } + pp.PromiseID = pp.PromiseID & (1<<31 - 1) + + if int(padLength) > len(p) { + // like the DATA frame, error out if padding is longer than the body. + countError("frame_pushpromise_pad_too_big") + return nil, ConnectionError(ErrCodeProtocol) + } + pp.headerFragBuf = p[:len(p)-int(padLength)] + return pp, nil +} + +// PushPromiseParam are the parameters for writing a PUSH_PROMISE frame. +type PushPromiseParam struct { + // StreamID is the required Stream ID to initiate. + StreamID uint32 + + // PromiseID is the required Stream ID which this + // Push Promises + PromiseID uint32 + + // BlockFragment is part (or all) of a Header Block. + BlockFragment []byte + + // EndHeaders indicates that this frame contains an entire + // header block and is not followed by any + // CONTINUATION frames. + EndHeaders bool + + // PadLength is the optional number of bytes of zeros to add + // to this frame. + PadLength uint8 +} + +// WritePushPromise writes a single PushPromise Frame. +// +// As with Header Frames, This is the low level call for writing +// individual frames. Continuation frames are handled elsewhere. +// +// It will perform exactly one Write to the underlying Writer. +// It is the caller's responsibility to not call other Write methods concurrently. +func (f *Framer) WritePushPromise(p PushPromiseParam) error { + if !validStreamID(p.StreamID) && !f.AllowIllegalWrites { + return errStreamID + } + var flags Flags + if p.PadLength != 0 { + flags |= FlagPushPromisePadded + } + if p.EndHeaders { + flags |= FlagPushPromiseEndHeaders + } + f.startWrite(FramePushPromise, flags, p.StreamID) + if p.PadLength != 0 { + f.writeByte(p.PadLength) + } + if !validStreamID(p.PromiseID) && !f.AllowIllegalWrites { + return errStreamID + } + f.writeUint32(p.PromiseID) + f.wbuf = append(f.wbuf, p.BlockFragment...) + f.wbuf = append(f.wbuf, padZeros[:p.PadLength]...) + return f.endWrite() +} + +// WriteRawFrame writes a raw frame. This can be used to write +// extension frames unknown to this package. +func (f *Framer) WriteRawFrame(t FrameType, flags Flags, streamID uint32, payload []byte) error { + f.startWrite(t, flags, streamID) + f.writeBytes(payload) + return f.endWrite() +} + +func readByte(p []byte) (remain []byte, b byte, err error) { + if len(p) == 0 { + return nil, 0, io.ErrUnexpectedEOF + } + return p[1:], p[0], nil +} + +func readUint32(p []byte) (remain []byte, v uint32, err error) { + if len(p) < 4 { + return nil, 0, io.ErrUnexpectedEOF + } + return p[4:], binary.BigEndian.Uint32(p[:4]), nil +} + +type streamEnder interface { + StreamEnded() bool +} + +type headersEnder interface { + HeadersEnded() bool +} + +type headersOrContinuation interface { + headersEnder + HeaderBlockFragment() []byte +} + +// A MetaHeadersFrame is the representation of one HEADERS frame and +// zero or more contiguous CONTINUATION frames and the decoding of +// their HPACK-encoded contents. +// +// This type of frame does not appear on the wire and is only returned +// by the Framer when Framer.ReadMetaHeaders is set. +type MetaHeadersFrame struct { + *HeadersFrame + + // Fields are the fields contained in the HEADERS and + // CONTINUATION frames. The underlying slice is owned by the + // Framer and must not be retained after the next call to + // ReadFrame. + // + // Fields are guaranteed to be in the correct http2 order and + // not have unknown pseudo header fields or invalid header + // field names or values. Required pseudo header fields may be + // missing, however. Use the MetaHeadersFrame.Pseudo accessor + // method access pseudo headers. + Fields []hpack.HeaderField + + // Truncated is whether the max header list size limit was hit + // and Fields is incomplete. The hpack decoder state is still + // valid, however. + Truncated bool +} + +// PseudoValue returns the given pseudo header field's value. +// The provided pseudo field should not contain the leading colon. +func (mh *MetaHeadersFrame) PseudoValue(pseudo string) string { + for _, hf := range mh.Fields { + if !hf.IsPseudo() { + return "" + } + if hf.Name[1:] == pseudo { + return hf.Value + } + } + return "" +} + +// RegularFields returns the regular (non-pseudo) header fields of mh. +// The caller does not own the returned slice. +func (mh *MetaHeadersFrame) RegularFields() []hpack.HeaderField { + for i, hf := range mh.Fields { + if !hf.IsPseudo() { + return mh.Fields[i:] + } + } + return nil +} + +// PseudoFields returns the pseudo header fields of mh. +// The caller does not own the returned slice. +func (mh *MetaHeadersFrame) PseudoFields() []hpack.HeaderField { + for i, hf := range mh.Fields { + if !hf.IsPseudo() { + return mh.Fields[:i] + } + } + return mh.Fields +} + +func (mh *MetaHeadersFrame) checkPseudos() error { + var isRequest, isResponse bool + pf := mh.PseudoFields() + for i, hf := range pf { + switch hf.Name { + case ":method", ":path", ":scheme", ":authority", ":protocol": + isRequest = true + case ":status": + isResponse = true + default: + return pseudoHeaderError(hf.Name) + } + // Check for duplicates. + // This would be a bad algorithm, but N is 5. + // And this doesn't allocate. + for _, hf2 := range pf[:i] { + if hf.Name == hf2.Name { + return duplicatePseudoHeaderError(hf.Name) + } + } + } + if isRequest && isResponse { + return errMixPseudoHeaderTypes + } + return nil +} + +func (fr *Framer) maxHeaderStringLen() int { + v := int(fr.maxHeaderListSize()) + if v < 0 { + // If maxHeaderListSize overflows an int, use no limit (0). + return 0 + } + return v +} + +// readMetaFrame returns 0 or more CONTINUATION frames from fr and +// merge them into the provided hf and returns a MetaHeadersFrame +// with the decoded hpack values. +func (fr *Framer) readMetaFrame(hf *HeadersFrame) (Frame, error) { + if fr.AllowIllegalReads { + return nil, errors.New("illegal use of AllowIllegalReads with ReadMetaHeaders") + } + mh := &MetaHeadersFrame{ + HeadersFrame: hf, + } + var remainSize = fr.maxHeaderListSize() + var sawRegular bool + + var invalid error // pseudo header field errors + hdec := fr.ReadMetaHeaders + hdec.SetEmitEnabled(true) + hdec.SetMaxStringLength(fr.maxHeaderStringLen()) + hdec.SetEmitFunc(func(hf hpack.HeaderField) { + if VerboseLogs && fr.logReads { + fr.debugReadLoggerf("http2: decoded hpack field %+v", hf) + } + if !httpguts.ValidHeaderFieldValue(hf.Value) { + // Don't include the value in the error, because it may be sensitive. + invalid = headerFieldValueError(hf.Name) + } + isPseudo := strings.HasPrefix(hf.Name, ":") + if isPseudo { + if sawRegular { + invalid = errPseudoAfterRegular + } + } else { + sawRegular = true + if !validWireHeaderFieldName(hf.Name) { + invalid = headerFieldNameError(hf.Name) + } + } + + if invalid != nil { + hdec.SetEmitEnabled(false) + return + } + + size := hf.Size() + if size > remainSize { + hdec.SetEmitEnabled(false) + mh.Truncated = true + remainSize = 0 + return + } + remainSize -= size + + mh.Fields = append(mh.Fields, hf) + }) + // Lose reference to MetaHeadersFrame: + defer hdec.SetEmitFunc(func(hf hpack.HeaderField) {}) + + var hc headersOrContinuation = hf + for { + frag := hc.HeaderBlockFragment() + + // Avoid parsing large amounts of headers that we will then discard. + // If the sender exceeds the max header list size by too much, + // skip parsing the fragment and close the connection. + // + // "Too much" is either any CONTINUATION frame after we've already + // exceeded the max header list size (in which case remainSize is 0), + // or a frame whose encoded size is more than twice the remaining + // header list bytes we're willing to accept. + if int64(len(frag)) > int64(2*remainSize) { + if VerboseLogs { + log.Printf("http2: header list too large") + } + // It would be nice to send a RST_STREAM before sending the GOAWAY, + // but the structure of the server's frame writer makes this difficult. + return mh, ConnectionError(ErrCodeProtocol) + } + + // Also close the connection after any CONTINUATION frame following an + // invalid header, since we stop tracking the size of the headers after + // an invalid one. + if invalid != nil { + if VerboseLogs { + log.Printf("http2: invalid header: %v", invalid) + } + // It would be nice to send a RST_STREAM before sending the GOAWAY, + // but the structure of the server's frame writer makes this difficult. + return mh, ConnectionError(ErrCodeProtocol) + } + + if _, err := hdec.Write(frag); err != nil { + return mh, ConnectionError(ErrCodeCompression) + } + + if hc.HeadersEnded() { + break + } + if f, err := fr.ReadFrame(); err != nil { + return nil, err + } else { + hc = f.(*ContinuationFrame) // guaranteed by checkFrameOrder + } + } + + mh.HeadersFrame.headerFragBuf = nil + mh.HeadersFrame.invalidate() + + if err := hdec.Close(); err != nil { + return mh, ConnectionError(ErrCodeCompression) + } + if invalid != nil { + fr.errDetail = invalid + if VerboseLogs { + log.Printf("http2: invalid header: %v", invalid) + } + return nil, StreamError{mh.StreamID, ErrCodeProtocol, invalid} + } + if err := mh.checkPseudos(); err != nil { + fr.errDetail = err + if VerboseLogs { + log.Printf("http2: invalid pseudo headers: %v", err) + } + return nil, StreamError{mh.StreamID, ErrCodeProtocol, err} + } + return mh, nil +} + +func summarizeFrame(f Frame) string { + var buf bytes.Buffer + f.Header().writeDebug(&buf) + switch f := f.(type) { + case *SettingsFrame: + n := 0 + f.ForeachSetting(func(s Setting) error { + n++ + if n == 1 { + buf.WriteString(", settings:") + } + fmt.Fprintf(&buf, " %v=%v,", s.ID, s.Val) + return nil + }) + if n > 0 { + buf.Truncate(buf.Len() - 1) // remove trailing comma + } + case *DataFrame: + data := f.Data() + const max = 256 + if len(data) > max { + data = data[:max] + } + fmt.Fprintf(&buf, " data=%q", data) + if len(f.Data()) > max { + fmt.Fprintf(&buf, " (%d bytes omitted)", len(f.Data())-max) + } + case *WindowUpdateFrame: + if f.StreamID == 0 { + buf.WriteString(" (conn)") + } + fmt.Fprintf(&buf, " incr=%v", f.Increment) + case *PingFrame: + fmt.Fprintf(&buf, " ping=%q", f.Data[:]) + case *GoAwayFrame: + fmt.Fprintf(&buf, " LastStreamID=%v ErrCode=%v Debug=%q", + f.LastStreamID, f.ErrCode, f.debugData) + case *RSTStreamFrame: + fmt.Fprintf(&buf, " ErrCode=%v", f.ErrCode) + } + return buf.String() +} diff --git a/backend/vendor/github.com/enetx/http2/gotrack.go b/backend/vendor/github.com/enetx/http2/gotrack.go new file mode 100644 index 0000000..9921ca0 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/gotrack.go @@ -0,0 +1,181 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Defensive debug-only utility to track that functions run on the +// goroutine that they're supposed to. + +package http2 + +import ( + "bytes" + "errors" + "fmt" + "os" + "runtime" + "strconv" + "sync" + "sync/atomic" +) + +var DebugGoroutines = os.Getenv("DEBUG_HTTP2_GOROUTINES") == "1" + +// Setting DebugGoroutines to false during a test to disable goroutine debugging +// results in race detector complaints when a test leaves goroutines running before +// returning. Tests shouldn't do this, of course, but when they do it generally shows +// up as infrequent, hard-to-debug flakes. (See #66519.) +// +// Disable goroutine debugging during individual tests with an atomic bool. +// (Note that it's safe to enable/disable debugging mid-test, so the actual race condition +// here is harmless.) +var disableDebugGoroutines atomic.Bool + +type goroutineLock uint64 + +func newGoroutineLock() goroutineLock { + if !DebugGoroutines || disableDebugGoroutines.Load() { + return 0 + } + return goroutineLock(curGoroutineID()) +} + +func (g goroutineLock) check() { + if !DebugGoroutines || disableDebugGoroutines.Load() { + return + } + if curGoroutineID() != uint64(g) { + panic("running on the wrong goroutine") + } +} + +func (g goroutineLock) checkNotOn() { + if !DebugGoroutines || disableDebugGoroutines.Load() { + return + } + if curGoroutineID() == uint64(g) { + panic("running on the wrong goroutine") + } +} + +var goroutineSpace = []byte("goroutine ") + +func curGoroutineID() uint64 { + bp := littleBuf.Get().(*[]byte) + defer littleBuf.Put(bp) + b := *bp + b = b[:runtime.Stack(b, false)] + // Parse the 4707 out of "goroutine 4707 [" + b = bytes.TrimPrefix(b, goroutineSpace) + i := bytes.IndexByte(b, ' ') + if i < 0 { + panic(fmt.Sprintf("No space found in %q", b)) + } + b = b[:i] + n, err := parseUintBytes(b, 10, 64) + if err != nil { + panic(fmt.Sprintf("Failed to parse goroutine ID out of %q: %v", b, err)) + } + return n +} + +var littleBuf = sync.Pool{ + New: func() interface{} { + buf := make([]byte, 64) + return &buf + }, +} + +// parseUintBytes is like strconv.ParseUint, but using a []byte. +func parseUintBytes(s []byte, base int, bitSize int) (n uint64, err error) { + var cutoff, maxVal uint64 + + if bitSize == 0 { + bitSize = int(strconv.IntSize) + } + + s0 := s + switch { + case len(s) < 1: + err = strconv.ErrSyntax + goto Error + + case 2 <= base && base <= 36: + // valid base; nothing to do + + case base == 0: + // Look for octal, hex prefix. + switch { + case s[0] == '0' && len(s) > 1 && (s[1] == 'x' || s[1] == 'X'): + base = 16 + s = s[2:] + if len(s) < 1 { + err = strconv.ErrSyntax + goto Error + } + case s[0] == '0': + base = 8 + default: + base = 10 + } + + default: + err = errors.New("invalid base " + strconv.Itoa(base)) + goto Error + } + + n = 0 + cutoff = cutoff64(base) + maxVal = 1<= base { + n = 0 + err = strconv.ErrSyntax + goto Error + } + + if n >= cutoff { + // n*base overflows + n = 1<<64 - 1 + err = strconv.ErrRange + goto Error + } + n *= uint64(base) + + n1 := n + uint64(v) + if n1 < n || n1 > maxVal { + // n+v overflows + n = 1<<64 - 1 + err = strconv.ErrRange + goto Error + } + n = n1 + } + + return n, nil + +Error: + return n, &strconv.NumError{Func: "ParseUint", Num: string(s0), Err: err} +} + +// Return the first number n such that n*base >= 1<<64. +func cutoff64(base int) uint64 { + if base < 2 { + return 0 + } + return (1<<64-1)/uint64(base) + 1 +} diff --git a/backend/vendor/github.com/enetx/http2/http2.go b/backend/vendor/github.com/enetx/http2/http2.go new file mode 100644 index 0000000..22fde79 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/http2.go @@ -0,0 +1,409 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package http2 implements the HTTP/2 protocol. +// +// This package is low-level and intended to be used directly by very +// few people. Most users will use it indirectly through the automatic +// use by the net/http package (from Go 1.6 and later). +// For use in earlier Go versions see ConfigureServer. (Transport support +// requires Go 1.6 or later) +// +// See https://http2.github.io/ for more information on HTTP/2. +package http2 // import "golang.org/x/net/http2" + +import ( + "bufio" + "crypto/tls" + "errors" + "fmt" + "net" + "os" + "sort" + "strconv" + "strings" + "sync" + "time" + + "github.com/enetx/http" + "golang.org/x/net/http/httpguts" +) + +var ( + VerboseLogs bool + logFrameWrites bool + logFrameReads bool + + // Enabling extended CONNECT by causes browsers to attempt to use + // WebSockets-over-HTTP/2. This results in problems when the server's websocket + // package doesn't support extended CONNECT. + // + // Disable extended CONNECT by default for now. + // + // Issue #71128. + disableExtendedConnectProtocol = true +) + +func init() { + e := os.Getenv("GODEBUG") + if strings.Contains(e, "http2debug=1") { + VerboseLogs = true + } + if strings.Contains(e, "http2debug=2") { + VerboseLogs = true + logFrameWrites = true + logFrameReads = true + } + if strings.Contains(e, "http2xconnect=1") { + disableExtendedConnectProtocol = false + } +} + +const ( + // ClientPreface is the string that must be sent by new + // connections from clients. + ClientPreface = "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n" + + // SETTINGS_MAX_FRAME_SIZE default + // https://httpwg.org/specs/rfc7540.html#rfc.section.6.5.2 + initialMaxFrameSize = 16384 + + // NextProtoTLS is the NPN/ALPN protocol negotiated during + // HTTP/2's TLS setup. + NextProtoTLS = "h2" + + // https://httpwg.org/specs/rfc7540.html#SettingValues + initialHeaderTableSize = 4096 + + initialWindowSize = 65535 // 6.9.2 Initial Flow Control Window Size + + defaultMaxReadFrameSize = 1 << 20 +) + +var ( + clientPreface = []byte(ClientPreface) +) + +type streamState int + +// HTTP/2 stream states. +// +// See http://tools.ietf.org/html/rfc7540#section-5.1. +// +// For simplicity, the server code merges "reserved (local)" into +// "half-closed (remote)". This is one less state transition to track. +// The only downside is that we send PUSH_PROMISEs slightly less +// liberally than allowable. More discussion here: +// https://lists.w3.org/Archives/Public/ietf-http-wg/2016JulSep/0599.html +// +// "reserved (remote)" is omitted since the client code does not +// support server push. +const ( + stateIdle streamState = iota + stateOpen + stateHalfClosedLocal + stateHalfClosedRemote + stateClosed +) + +var stateName = [...]string{ + stateIdle: "Idle", + stateOpen: "Open", + stateHalfClosedLocal: "HalfClosedLocal", + stateHalfClosedRemote: "HalfClosedRemote", + stateClosed: "Closed", +} + +func (st streamState) String() string { + return stateName[st] +} + +// Setting is a setting parameter: which setting it is, and its value. +type Setting struct { + // ID is which setting is being set. + // See https://httpwg.org/specs/rfc7540.html#SettingFormat + ID SettingID + + // Val is the value. + Val uint32 +} + +func (s Setting) String() string { + return fmt.Sprintf("[%v = %d]", s.ID, s.Val) +} + +// Valid reports whether the setting is valid. +func (s Setting) Valid() error { + // Limits and error codes from 6.5.2 Defined SETTINGS Parameters + switch s.ID { + case SettingEnablePush: + if s.Val != 1 && s.Val != 0 { + return ConnectionError(ErrCodeProtocol) + } + case SettingInitialWindowSize: + if s.Val > 1<<31-1 { + return ConnectionError(ErrCodeFlowControl) + } + case SettingMaxFrameSize: + if s.Val < 16384 || s.Val > 1<<24-1 { + return ConnectionError(ErrCodeProtocol) + } + case SettingEnableConnectProtocol: + if s.Val != 1 && s.Val != 0 { + return ConnectionError(ErrCodeProtocol) + } + } + return nil +} + +// A SettingID is an HTTP/2 setting as defined in +// https://httpwg.org/specs/rfc7540.html#iana-settings +type SettingID uint16 + +const ( + SettingHeaderTableSize SettingID = 0x1 + SettingEnablePush SettingID = 0x2 + SettingMaxConcurrentStreams SettingID = 0x3 + SettingInitialWindowSize SettingID = 0x4 + SettingMaxFrameSize SettingID = 0x5 + SettingMaxHeaderListSize SettingID = 0x6 + SettingEnableConnectProtocol SettingID = 0x8 +) + +var settingName = map[SettingID]string{ + SettingHeaderTableSize: "HEADER_TABLE_SIZE", + SettingEnablePush: "ENABLE_PUSH", + SettingMaxConcurrentStreams: "MAX_CONCURRENT_STREAMS", + SettingInitialWindowSize: "INITIAL_WINDOW_SIZE", + SettingMaxFrameSize: "MAX_FRAME_SIZE", + SettingMaxHeaderListSize: "MAX_HEADER_LIST_SIZE", + SettingEnableConnectProtocol: "ENABLE_CONNECT_PROTOCOL", +} + +func (s SettingID) String() string { + if v, ok := settingName[s]; ok { + return v + } + return fmt.Sprintf("UNKNOWN_SETTING_%d", uint16(s)) +} + +// validWireHeaderFieldName reports whether v is a valid header field +// name (key). See httpguts.ValidHeaderName for the base rules. +// +// Further, http2 says: +// +// "Just as in HTTP/1.x, header field names are strings of ASCII +// characters that are compared in a case-insensitive +// fashion. However, header field names MUST be converted to +// lowercase prior to their encoding in HTTP/2. " +func validWireHeaderFieldName(v string) bool { + if len(v) == 0 { + return false + } + for _, r := range v { + if !httpguts.IsTokenRune(r) { + return false + } + if 'A' <= r && r <= 'Z' { + return false + } + } + return true +} + +func httpCodeString(code int) string { + switch code { + case 200: + return "200" + case 404: + return "404" + } + return strconv.Itoa(code) +} + +// from pkg io +type stringWriter interface { + WriteString(s string) (n int, err error) +} + +// A closeWaiter is like a sync.WaitGroup but only goes 1 to 0 (open to closed). +type closeWaiter chan struct{} + +// Init makes a closeWaiter usable. +// It exists because so a closeWaiter value can be placed inside a +// larger struct and have the Mutex and Cond's memory in the same +// allocation. +func (cw *closeWaiter) Init() { + *cw = make(chan struct{}) +} + +// Close marks the closeWaiter as closed and unblocks any waiters. +func (cw closeWaiter) Close() { + close(cw) +} + +// Wait waits for the closeWaiter to become closed. +func (cw closeWaiter) Wait() { + <-cw +} + +// bufferedWriter is a buffered writer that writes to w. +// Its buffered writer is lazily allocated as needed, to minimize +// idle memory usage with many connections. +type bufferedWriter struct { + _ incomparable + conn net.Conn // immutable + bw *bufio.Writer // non-nil when data is buffered + byteTimeout time.Duration // immutable, WriteByteTimeout +} + +func newBufferedWriter(conn net.Conn, timeout time.Duration) *bufferedWriter { + return &bufferedWriter{ + conn: conn, + byteTimeout: timeout, + } +} + +// bufWriterPoolBufferSize is the size of bufio.Writer's +// buffers created using bufWriterPool. +// +// TODO: pick a less arbitrary value? this is a bit under +// (3 x typical 1500 byte MTU) at least. Other than that, +// not much thought went into it. +const bufWriterPoolBufferSize = 4 << 10 + +var bufWriterPool = sync.Pool{ + New: func() interface{} { + return bufio.NewWriterSize(nil, bufWriterPoolBufferSize) + }, +} + +func (w *bufferedWriter) Available() int { + if w.bw == nil { + return bufWriterPoolBufferSize + } + return w.bw.Available() +} + +func (w *bufferedWriter) Write(p []byte) (n int, err error) { + if w.bw == nil { + bw := bufWriterPool.Get().(*bufio.Writer) + bw.Reset((*bufferedWriterTimeoutWriter)(w)) + w.bw = bw + } + return w.bw.Write(p) +} + +func (w *bufferedWriter) Flush() error { + bw := w.bw + if bw == nil { + return nil + } + err := bw.Flush() + bw.Reset(nil) + bufWriterPool.Put(bw) + w.bw = nil + return err +} + +type bufferedWriterTimeoutWriter bufferedWriter + +func (w *bufferedWriterTimeoutWriter) Write(p []byte) (n int, err error) { + return writeWithByteTimeout(w.conn, w.byteTimeout, p) +} + +// writeWithByteTimeout writes to conn. +// If more than timeout passes without any bytes being written to the connection, +// the write fails. +func writeWithByteTimeout(conn net.Conn, timeout time.Duration, p []byte) (n int, err error) { + if timeout <= 0 { + return conn.Write(p) + } + for { + conn.SetWriteDeadline(time.Now().Add(timeout)) + nn, err := conn.Write(p[n:]) + n += nn + if n == len(p) || nn == 0 || !errors.Is(err, os.ErrDeadlineExceeded) { + // Either we finished the write, made no progress, or hit the deadline. + // Whichever it is, we're done now. + conn.SetWriteDeadline(time.Time{}) + return n, err + } + } +} + +func mustUint31(v int32) uint32 { + if v < 0 || v > 2147483647 { + panic("out of range") + } + return uint32(v) +} + +// bodyAllowedForStatus reports whether a given response status code +// permits a body. See RFC 7230, section 3.3. +func bodyAllowedForStatus(status int) bool { + switch { + case status >= 100 && status <= 199: + return false + case status == 204: + return false + case status == 304: + return false + } + return true +} + +type httpError struct { + _ incomparable + msg string + timeout bool +} + +func (e *httpError) Error() string { return e.msg } +func (e *httpError) Timeout() bool { return e.timeout } +func (e *httpError) Temporary() bool { return true } + +var errTimeout error = &httpError{msg: "http2: timeout awaiting response headers", timeout: true} + +type connectionStater interface { + ConnectionState() tls.ConnectionState +} + +var sorterPool = sync.Pool{New: func() interface{} { return new(sorter) }} + +type sorter struct { + v []string // owned by sorter +} + +func (s *sorter) Len() int { return len(s.v) } +func (s *sorter) Swap(i, j int) { s.v[i], s.v[j] = s.v[j], s.v[i] } +func (s *sorter) Less(i, j int) bool { return s.v[i] < s.v[j] } + +// Keys returns the sorted keys of h. +// +// The returned slice is only valid until s used again or returned to +// its pool. +func (s *sorter) Keys(h http.Header) []string { + keys := s.v[:0] + for k := range h { + keys = append(keys, k) + } + s.v = keys + sort.Sort(s) + return keys +} + +func (s *sorter) SortStrings(ss []string) { + // Our sorter works on s.v, which sorter owns, so + // stash it away while we sort the user's buffer. + save := s.v + s.v = ss + sort.Sort(s) + s.v = save +} + +// incomparable is a zero-width, non-comparable type. Adding it to a struct +// makes that struct also non-comparable, and generally doesn't add +// any size (as long as it's first). +type incomparable [0]func() diff --git a/backend/vendor/github.com/enetx/http2/httpcommon/ascii.go b/backend/vendor/github.com/enetx/http2/httpcommon/ascii.go new file mode 100644 index 0000000..ed14da5 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/httpcommon/ascii.go @@ -0,0 +1,53 @@ +// Copyright 2025 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package httpcommon + +import "strings" + +// The HTTP protocols are defined in terms of ASCII, not Unicode. This file +// contains helper functions which may use Unicode-aware functions which would +// otherwise be unsafe and could introduce vulnerabilities if used improperly. + +// asciiEqualFold is strings.EqualFold, ASCII only. It reports whether s and t +// are equal, ASCII-case-insensitively. +func asciiEqualFold(s, t string) bool { + if len(s) != len(t) { + return false + } + for i := 0; i < len(s); i++ { + if lower(s[i]) != lower(t[i]) { + return false + } + } + return true +} + +// lower returns the ASCII lowercase version of b. +func lower(b byte) byte { + if 'A' <= b && b <= 'Z' { + return b + ('a' - 'A') + } + return b +} + +// isASCIIPrint returns whether s is ASCII and printable according to +// https://tools.ietf.org/html/rfc20#section-4.2. +func isASCIIPrint(s string) bool { + for i := 0; i < len(s); i++ { + if s[i] < ' ' || s[i] > '~' { + return false + } + } + return true +} + +// asciiToLower returns the lowercase version of s if s is ASCII and printable, +// and whether or not it was. +func asciiToLower(s string) (lower string, ok bool) { + if !isASCIIPrint(s) { + return "", false + } + return strings.ToLower(s), true +} diff --git a/backend/vendor/github.com/enetx/http2/httpcommon/header.go b/backend/vendor/github.com/enetx/http2/httpcommon/header.go new file mode 100644 index 0000000..f5002d8 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/httpcommon/header.go @@ -0,0 +1,100 @@ +package httpcommon + +import ( + "maps" + "sort" + "strings" + "sync" +) + +type Header map[string][]string + +var lock = sync.RWMutex{} + +const ( + HeaderOrderKey = "Header-Order:" + PHeaderOrderKey = "PHeader-Order:" +) + +func (h Header) Clone() Header { return maps.Clone(h) } + +type headerKeyValues struct { + Key string + Values []string +} + +type headerSorter struct { + kvs []headerKeyValues + order map[string]int +} + +var headerSorterPool = sync.Pool{ + New: func() any { return new(headerSorter) }, +} + +func (s *headerSorter) Len() int { return len(s.kvs) } +func (s *headerSorter) Swap(i, j int) { s.kvs[i], s.kvs[j] = s.kvs[j], s.kvs[i] } +func (s *headerSorter) Less(i, j int) bool { + // If the order isn't defined, sort lexicographically. + if s.order == nil { + return s.kvs[i].Key < s.kvs[j].Key + } + + idxi, iok := s.order[strings.ToLower(s.kvs[i].Key)] + idxj, jok := s.order[strings.ToLower(s.kvs[j].Key)] + if !iok && !jok { + return s.kvs[i].Key < s.kvs[j].Key + } else if !iok && jok { + return false + } else if iok && !jok { + return true + } + + return idxi < idxj +} + +func (h Header) SortedKeyValues(exclude map[string]bool) (kvs []headerKeyValues, hs *headerSorter) { + hs = headerSorterPool.Get().(*headerSorter) + if cap(hs.kvs) < len(h) { + hs.kvs = make([]headerKeyValues, 0, len(h)) + } + + kvs = hs.kvs[:0] + for k, vv := range h { + lock.RLock() + if !exclude[k] { + kvs = append(kvs, headerKeyValues{k, vv}) + } + lock.RUnlock() + } + + hs.kvs = kvs + sort.Sort(hs) + + return kvs, hs +} + +func (h Header) SortedKeyValuesBy( + order map[string]int, + exclude map[string]bool, +) (kvs []headerKeyValues, hs *headerSorter) { + hs = headerSorterPool.Get().(*headerSorter) + if cap(hs.kvs) < len(h) { + hs.kvs = make([]headerKeyValues, 0, len(h)) + } + + kvs = hs.kvs[:0] + for k, vv := range h { + lock.RLock() + if !exclude[k] { + kvs = append(kvs, headerKeyValues{k, vv}) + } + lock.RUnlock() + } + + hs.kvs = kvs + hs.order = order + sort.Sort(hs) + + return kvs, hs +} diff --git a/backend/vendor/github.com/enetx/http2/httpcommon/headermap.go b/backend/vendor/github.com/enetx/http2/httpcommon/headermap.go new file mode 100644 index 0000000..92483d8 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/httpcommon/headermap.go @@ -0,0 +1,115 @@ +// Copyright 2025 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package httpcommon + +import ( + "net/textproto" + "sync" +) + +var ( + commonBuildOnce sync.Once + commonLowerHeader map[string]string // Go-Canonical-Case -> lower-case + commonCanonHeader map[string]string // lower-case -> Go-Canonical-Case +) + +func buildCommonHeaderMapsOnce() { + commonBuildOnce.Do(buildCommonHeaderMaps) +} + +func buildCommonHeaderMaps() { + common := []string{ + "accept", + "accept-charset", + "accept-encoding", + "accept-language", + "accept-ranges", + "age", + "access-control-allow-credentials", + "access-control-allow-headers", + "access-control-allow-methods", + "access-control-allow-origin", + "access-control-expose-headers", + "access-control-max-age", + "access-control-request-headers", + "access-control-request-method", + "allow", + "authorization", + "cache-control", + "content-disposition", + "content-encoding", + "content-language", + "content-length", + "content-location", + "content-range", + "content-type", + "cookie", + "date", + "etag", + "expect", + "expires", + "from", + "host", + "if-match", + "if-modified-since", + "if-none-match", + "if-unmodified-since", + "last-modified", + "link", + "location", + "max-forwards", + "origin", + "proxy-authenticate", + "proxy-authorization", + "range", + "referer", + "refresh", + "retry-after", + "server", + "set-cookie", + "strict-transport-security", + "trailer", + "transfer-encoding", + "user-agent", + "vary", + "via", + "www-authenticate", + "x-forwarded-for", + "x-forwarded-proto", + } + commonLowerHeader = make(map[string]string, len(common)) + commonCanonHeader = make(map[string]string, len(common)) + for _, v := range common { + chk := textproto.CanonicalMIMEHeaderKey(v) + commonLowerHeader[chk] = v + commonCanonHeader[v] = chk + } +} + +// LowerHeader returns the lowercase form of a header name, +// used on the wire for HTTP/2 and HTTP/3 requests. +func LowerHeader(v string) (lower string, ascii bool) { + buildCommonHeaderMapsOnce() + if s, ok := commonLowerHeader[v]; ok { + return s, true + } + return asciiToLower(v) +} + +// CanonicalHeader canonicalizes a header name. (For example, "host" becomes "Host".) +func CanonicalHeader(v string) string { + buildCommonHeaderMapsOnce() + if s, ok := commonCanonHeader[v]; ok { + return s + } + return textproto.CanonicalMIMEHeaderKey(v) +} + +// CachedCanonicalHeader returns the canonical form of a well-known header name. +func CachedCanonicalHeader(v string) (string, bool) { + buildCommonHeaderMapsOnce() + s, ok := commonCanonHeader[v] + return s, ok +} diff --git a/backend/vendor/github.com/enetx/http2/httpcommon/request.go b/backend/vendor/github.com/enetx/http2/httpcommon/request.go new file mode 100644 index 0000000..b0d5613 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/httpcommon/request.go @@ -0,0 +1,524 @@ +// Copyright 2025 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package httpcommon + +import ( + "context" + "errors" + "fmt" + "net/http/httptrace" + "net/textproto" + "net/url" + "sort" + "strconv" + "strings" + + "golang.org/x/net/http/httpguts" + "golang.org/x/net/http2/hpack" +) + +var ErrRequestHeaderListSize = errors.New("request header list larger than peer's advertised limit") + +// Request is a subset of http.Request. +// It'd be simpler to pass an *http.Request, of course, but we can't depend on net/http +// without creating a dependency cycle. +type Request struct { + URL *url.URL + Method string + Host string + Header Header + Trailer map[string][]string + ActualContentLength int64 // 0 means 0, -1 means unknown +} + +// EncodeHeadersParam is parameters to EncodeHeaders. +type EncodeHeadersParam struct { + Request Request + + // AddGzipHeader indicates that an "accept-encoding: gzip" header should be + // added to the request. + AddGzipHeader bool + + // PeerMaxHeaderListSize, when non-zero, is the peer's MAX_HEADER_LIST_SIZE setting. + PeerMaxHeaderListSize uint64 + + // DefaultUserAgent is the User-Agent header to send when the request + // neither contains a User-Agent nor disables it. + DefaultUserAgent string +} + +// EncodeHeadersParam is the result of EncodeHeaders. +type EncodeHeadersResult struct { + HasBody bool + HasTrailers bool +} + +// EncodeHeaders constructs request headers common to HTTP/2 and HTTP/3. +// It validates a request and calls headerf with each pseudo-header and header +// for the request. +// The headerf function is called with the validated, canonicalized header name. +func EncodeHeaders( + ctx context.Context, + param EncodeHeadersParam, + headerf func(name, value string), +) (res EncodeHeadersResult, _ error) { + req := param.Request + + // Check for invalid connection-level headers. + if err := checkConnHeaders(req.Header); err != nil { + return res, err + } + + if req.URL == nil { + return res, errors.New("Request.URL is nil") + } + + host := req.Host + if host == "" { + host = req.URL.Host + } + host, err := httpguts.PunycodeHostPort(host) + if err != nil { + return res, err + } + if !httpguts.ValidHostHeader(host) { + return res, errors.New("invalid Host header") + } + + // isNormalConnect is true if this is a non-extended CONNECT request. + isNormalConnect := false + var protocol string + if vv := req.Header[":protocol"]; len(vv) > 0 { + protocol = vv[0] + } + if req.Method == "CONNECT" && protocol == "" { + isNormalConnect = true + } else if protocol != "" && req.Method != "CONNECT" { + return res, errors.New("invalid :protocol header in non-CONNECT request") + } + + // Validate the path, except for non-extended CONNECT requests which have no path. + var path string + if !isNormalConnect { + path = req.URL.RequestURI() + if !validPseudoPath(path) { + orig := path + path = strings.TrimPrefix(path, req.URL.Scheme+"://"+host) + if !validPseudoPath(path) { + if req.URL.Opaque != "" { + return res, fmt.Errorf("invalid request :path %q from URL.Opaque = %q", orig, req.URL.Opaque) + } else { + return res, fmt.Errorf("invalid request :path %q", orig) + } + } + } + } + + // Check for any invalid headers+trailers and return an error before we + // potentially pollute our hpack state. (We want to be able to + // continue to reuse the hpack encoder for future requests) + if err := validateHeaders(req.Header); err != "" { + return res, fmt.Errorf("invalid HTTP header %s", err) + } + if err := validateHeaders(req.Trailer); err != "" { + return res, fmt.Errorf("invalid HTTP trailer %s", err) + } + + trailers, err := commaSeparatedTrailers(req.Trailer) + if err != nil { + return res, err + } + + enumerateHeaders := func(f func(name, value string)) { + pHeaderOrder, ok := req.Header[PHeaderOrderKey] + m := req.Method + if m == "" { + m = "GET" + } + + if ok { + // follow based on pseudo header order + for _, p := range pHeaderOrder { + switch p { + case ":authority": + f(":authority", host) + case ":method": + f(":method", m) + case ":path": + if !isNormalConnect { + f(":path", path) + } + case ":scheme": + if !isNormalConnect { + f(":scheme", req.URL.Scheme) + } + + // Currently skips over unrecognized pheader fields, + // should throw error or something but works for now. + default: + continue + } + } + } else { + // 8.1.2.3 Request Pseudo-Header Fields + // The :path pseudo-header field includes the path and query parts of the + // target URI (the path-absolute production and optionally a '?' character + // followed by the query production, see Sections 3.3 and 3.4 of + // [RFC3986]). + f(":authority", host) + f(":method", m) + if !isNormalConnect { + f(":path", path) + f(":scheme", req.URL.Scheme) + } + } + + if protocol != "" { + f(":protocol", protocol) + } + if trailers != "" { + f("trailer", trailers) + } + + // Should clone, because this function is called twice; to read and to write. + // If headers are added to the req, then headers would be added twice. + hdrs := req.Header.Clone() + var kvs []headerKeyValues + + if headerOrder, ok := hdrs[HeaderOrderKey]; ok { + order := make(map[string]int) + for i, v := range headerOrder { + order[v] = i + } + kvs, _ = hdrs.SortedKeyValuesBy(order, make(map[string]bool)) + } else { + kvs, _ = hdrs.SortedKeyValues(make(map[string]bool)) + } + + var didUA bool + for _, kv := range kvs { + k := kv.Key + vv := kv.Values + + if asciiEqualFold(k, "host") || asciiEqualFold(k, "content-length") { + // Host is :authority, already sent. + // Content-Length is automatic, set below. + continue + } else if asciiEqualFold(k, "connection") || + asciiEqualFold(k, "proxy-connection") || + asciiEqualFold(k, "transfer-encoding") || + asciiEqualFold(k, "upgrade") || + asciiEqualFold(k, "keep-alive") { + // Per 8.1.2.2 Connection-Specific Header + // Fields, don't send connection-specific + // fields. We have already checked if any + // are error-worthy so just ignore the rest. + continue + } else if asciiEqualFold(k, "user-agent") { + // Match Go's http1 behavior: at most one + // User-Agent. If set to nil or empty string, + // then omit it. Otherwise if not mentioned, + // include the default (below). + didUA = true + if len(vv) < 1 { + continue + } + vv = vv[:1] + if vv[0] == "" { + continue + } + } else if asciiEqualFold(k, "cookie") { + // Per 8.1.2.5 To allow for better compression efficiency, the + // Cookie header field MAY be split into separate header fields, + // each with one or more cookie-pairs. + for _, v := range vv { + for { + p := strings.IndexByte(v, ';') + if p < 0 { + break + } + f("cookie", v[:p]) + p++ + // strip space after semicolon if any. + for p+1 <= len(v) && v[p] == ' ' { + p++ + } + v = v[p:] + } + if len(v) > 0 { + f("cookie", v) + } + } + continue + } else if k == ":protocol" { + // :protocol pseudo-header was already sent above. + continue + } + + for _, v := range vv { + f(k, v) + } + } + if shouldSendReqContentLength(req.Method, req.ActualContentLength) { + f("content-length", strconv.FormatInt(req.ActualContentLength, 10)) + } + if param.AddGzipHeader { + f("accept-encoding", "gzip") + } + if !didUA { + f("user-agent", param.DefaultUserAgent) + } + } + + // Do a first pass over the headers counting bytes to ensure + // we don't exceed cc.peerMaxHeaderListSize. This is done as a + // separate pass before encoding the headers to prevent + // modifying the hpack state. + if param.PeerMaxHeaderListSize > 0 { + hlSize := uint64(0) + enumerateHeaders(func(name, value string) { + hf := hpack.HeaderField{Name: name, Value: value} + hlSize += uint64(hf.Size()) + }) + + if hlSize > param.PeerMaxHeaderListSize { + return res, ErrRequestHeaderListSize + } + } + + trace := httptrace.ContextClientTrace(ctx) + + // Header list size is ok. Write the headers. + enumerateHeaders(func(name, value string) { + // skips over writing magic key headers + if name == PHeaderOrderKey || name == HeaderOrderKey { + return + } + + name, ascii := LowerHeader(name) + if !ascii { + // Skip writing invalid headers. Per RFC 7540, Section 8.1.2, header + // field names have to be ASCII characters (just as in HTTP/1.x). + return + } + + headerf(name, value) + + if trace != nil && trace.WroteHeaderField != nil { + trace.WroteHeaderField(name, []string{value}) + } + }) + + res.HasBody = req.ActualContentLength != 0 + res.HasTrailers = trailers != "" + return res, nil +} + +// IsRequestGzip reports whether we should add an Accept-Encoding: gzip header +// for a request. +func IsRequestGzip(method string, header map[string][]string, disableCompression bool) bool { + // TODO(bradfitz): this is a copy of the logic in net/http. Unify somewhere? + if !disableCompression && + len(header["Accept-Encoding"]) == 0 && + len(header["Range"]) == 0 && + method != "HEAD" { + // Request gzip only, not deflate. Deflate is ambiguous and + // not as universally supported anyway. + // See: https://zlib.net/zlib_faq.html#faq39 + // + // Note that we don't request this for HEAD requests, + // due to a bug in nginx: + // http://trac.nginx.org/nginx/ticket/358 + // https://golang.org/issue/5522 + // + // We don't request gzip if the request is for a range, since + // auto-decoding a portion of a gzipped document will just fail + // anyway. See https://golang.org/issue/8923 + return true + } + return false +} + +// checkConnHeaders checks whether req has any invalid connection-level headers. +// +// https://www.rfc-editor.org/rfc/rfc9114.html#section-4.2-3 +// https://www.rfc-editor.org/rfc/rfc9113.html#section-8.2.2-1 +// +// Certain headers are special-cased as okay but not transmitted later. +// For example, we allow "Transfer-Encoding: chunked", but drop the header when encoding. +func checkConnHeaders(h map[string][]string) error { + if vv := h["Upgrade"]; len(vv) > 0 && (vv[0] != "" && vv[0] != "chunked") { + return fmt.Errorf("invalid Upgrade request header: %q", vv) + } + if vv := h["Transfer-Encoding"]; len(vv) > 0 && (len(vv) > 1 || vv[0] != "" && vv[0] != "chunked") { + return fmt.Errorf("invalid Transfer-Encoding request header: %q", vv) + } + if vv := h["Connection"]; len(vv) > 0 && + (len(vv) > 1 || vv[0] != "" && !asciiEqualFold(vv[0], "close") && !asciiEqualFold(vv[0], "keep-alive")) { + return fmt.Errorf("invalid Connection request header: %q", vv) + } + return nil +} + +func commaSeparatedTrailers(trailer map[string][]string) (string, error) { + keys := make([]string, 0, len(trailer)) + for k := range trailer { + k = CanonicalHeader(k) + switch k { + case "Transfer-Encoding", "Trailer", "Content-Length": + return "", fmt.Errorf("invalid Trailer key %q", k) + } + keys = append(keys, k) + } + if len(keys) > 0 { + sort.Strings(keys) + return strings.Join(keys, ","), nil + } + return "", nil +} + +// validPseudoPath reports whether v is a valid :path pseudo-header +// value. It must be either: +// +// - a non-empty string starting with '/' +// - the string '*', for OPTIONS requests. +// +// For now this is only used a quick check for deciding when to clean +// up Opaque URLs before sending requests from the Transport. +// See golang.org/issue/16847 +// +// We used to enforce that the path also didn't start with "//", but +// Google's GFE accepts such paths and Chrome sends them, so ignore +// that part of the spec. See golang.org/issue/19103. +func validPseudoPath(v string) bool { + return (len(v) > 0 && v[0] == '/') || v == "*" +} + +func validateHeaders(hdrs map[string][]string) string { + for k, vv := range hdrs { + if k == HeaderOrderKey || k == PHeaderOrderKey { + continue + } + if !httpguts.ValidHeaderFieldName(k) && k != ":protocol" { + return fmt.Sprintf("name %q", k) + } + for _, v := range vv { + if !httpguts.ValidHeaderFieldValue(v) { + // Don't include the value in the error, + // because it may be sensitive. + return fmt.Sprintf("value for header %q", k) + } + } + } + return "" +} + +// shouldSendReqContentLength reports whether we should send +// a "content-length" request header. This logic is basically a copy of the net/http +// transferWriter.shouldSendContentLength. +// The contentLength is the corrected contentLength (so 0 means actually 0, not unknown). +// -1 means unknown. +func shouldSendReqContentLength(method string, contentLength int64) bool { + if contentLength > 0 { + return true + } + if contentLength < 0 { + return false + } + // For zero bodies, whether we send a content-length depends on the method. + // It also kinda doesn't matter for http2 either way, with END_STREAM. + switch method { + case "POST", "PUT", "PATCH": + return true + default: + return false + } +} + +// ServerRequestParam is parameters to NewServerRequest. +type ServerRequestParam struct { + Method string + Scheme, Authority, Path string + Protocol string + Header map[string][]string +} + +// ServerRequestResult is the result of NewServerRequest. +type ServerRequestResult struct { + // Various http.Request fields. + URL *url.URL + RequestURI string + Trailer map[string][]string + + NeedsContinue bool // client provided an "Expect: 100-continue" header + + // If the request should be rejected, this is a short string suitable for passing + // to the http2 package's CountError function. + // It might be a bit odd to return errors this way rather than returing an error, + // but this ensures we don't forget to include a CountError reason. + InvalidReason string +} + +func NewServerRequest(rp ServerRequestParam) ServerRequestResult { + needsContinue := httpguts.HeaderValuesContainsToken(rp.Header["Expect"], "100-continue") + if needsContinue { + delete(rp.Header, "Expect") + } + // Merge Cookie headers into one "; "-delimited value. + if cookies := rp.Header["Cookie"]; len(cookies) > 1 { + rp.Header["Cookie"] = []string{strings.Join(cookies, "; ")} + } + + // Setup Trailers + var trailer map[string][]string + for _, v := range rp.Header["Trailer"] { + for _, key := range strings.Split(v, ",") { + key = textproto.CanonicalMIMEHeaderKey(textproto.TrimString(key)) + switch key { + case "Transfer-Encoding", "Trailer", "Content-Length": + // Bogus. (copy of http1 rules) + // Ignore. + default: + if trailer == nil { + trailer = make(map[string][]string) + } + trailer[key] = nil + } + } + } + delete(rp.Header, "Trailer") + + // "':authority' MUST NOT include the deprecated userinfo subcomponent + // for "http" or "https" schemed URIs." + // https://www.rfc-editor.org/rfc/rfc9113.html#section-8.3.1-2.3.8 + if strings.IndexByte(rp.Authority, '@') != -1 && (rp.Scheme == "http" || rp.Scheme == "https") { + return ServerRequestResult{ + InvalidReason: "userinfo_in_authority", + } + } + + var url_ *url.URL + var requestURI string + if rp.Method == "CONNECT" && rp.Protocol == "" { + url_ = &url.URL{Host: rp.Authority} + requestURI = rp.Authority // mimic HTTP/1 server behavior + } else { + var err error + url_, err = url.ParseRequestURI(rp.Path) + if err != nil { + return ServerRequestResult{ + InvalidReason: "bad_path", + } + } + requestURI = rp.Path + } + + return ServerRequestResult{ + URL: url_, + NeedsContinue: needsContinue, + RequestURI: requestURI, + Trailer: trailer, + } +} diff --git a/backend/vendor/github.com/enetx/http2/pipe.go b/backend/vendor/github.com/enetx/http2/pipe.go new file mode 100644 index 0000000..3b9f06b --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/pipe.go @@ -0,0 +1,184 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "errors" + "io" + "sync" +) + +// pipe is a goroutine-safe io.Reader/io.Writer pair. It's like +// io.Pipe except there are no PipeReader/PipeWriter halves, and the +// underlying buffer is an interface. (io.Pipe is always unbuffered) +type pipe struct { + mu sync.Mutex + c sync.Cond // c.L lazily initialized to &p.mu + b pipeBuffer // nil when done reading + unread int // bytes unread when done + err error // read error once empty. non-nil means closed. + breakErr error // immediate read error (caller doesn't see rest of b) + donec chan struct{} // closed on error + readFn func() // optional code to run in Read before error +} + +type pipeBuffer interface { + Len() int + io.Writer + io.Reader +} + +// setBuffer initializes the pipe buffer. +// It has no effect if the pipe is already closed. +func (p *pipe) setBuffer(b pipeBuffer) { + p.mu.Lock() + defer p.mu.Unlock() + if p.err != nil || p.breakErr != nil { + return + } + p.b = b +} + +func (p *pipe) Len() int { + p.mu.Lock() + defer p.mu.Unlock() + if p.b == nil { + return p.unread + } + return p.b.Len() +} + +// Read waits until data is available and copies bytes +// from the buffer into p. +func (p *pipe) Read(d []byte) (n int, err error) { + p.mu.Lock() + defer p.mu.Unlock() + if p.c.L == nil { + p.c.L = &p.mu + } + for { + if p.breakErr != nil { + return 0, p.breakErr + } + if p.b != nil && p.b.Len() > 0 { + return p.b.Read(d) + } + if p.err != nil { + if p.readFn != nil { + p.readFn() // e.g. copy trailers + p.readFn = nil // not sticky like p.err + } + p.b = nil + return 0, p.err + } + p.c.Wait() + } +} + +var ( + errClosedPipeWrite = errors.New("write on closed buffer") + errUninitializedPipeWrite = errors.New("write on uninitialized buffer") +) + +// Write copies bytes from p into the buffer and wakes a reader. +// It is an error to write more data than the buffer can hold. +func (p *pipe) Write(d []byte) (n int, err error) { + p.mu.Lock() + defer p.mu.Unlock() + if p.c.L == nil { + p.c.L = &p.mu + } + defer p.c.Signal() + if p.err != nil || p.breakErr != nil { + return 0, errClosedPipeWrite + } + // pipe.setBuffer is never invoked, leaving the buffer uninitialized. + // We shouldn't try to write to an uninitialized pipe, + // but returning an error is better than panicking. + if p.b == nil { + return 0, errUninitializedPipeWrite + } + return p.b.Write(d) +} + +// CloseWithError causes the next Read (waking up a current blocked +// Read if needed) to return the provided err after all data has been +// read. +// +// The error must be non-nil. +func (p *pipe) CloseWithError(err error) { p.closeWithError(&p.err, err, nil) } + +// BreakWithError causes the next Read (waking up a current blocked +// Read if needed) to return the provided err immediately, without +// waiting for unread data. +func (p *pipe) BreakWithError(err error) { p.closeWithError(&p.breakErr, err, nil) } + +// closeWithErrorAndCode is like CloseWithError but also sets some code to run +// in the caller's goroutine before returning the error. +func (p *pipe) closeWithErrorAndCode(err error, fn func()) { p.closeWithError(&p.err, err, fn) } + +func (p *pipe) closeWithError(dst *error, err error, fn func()) { + if err == nil { + panic("err must be non-nil") + } + p.mu.Lock() + defer p.mu.Unlock() + if p.c.L == nil { + p.c.L = &p.mu + } + defer p.c.Signal() + if *dst != nil { + // Already been done. + return + } + p.readFn = fn + if dst == &p.breakErr { + if p.b != nil { + p.unread += p.b.Len() + } + p.b = nil + } + *dst = err + p.closeDoneLocked() +} + +// requires p.mu be held. +func (p *pipe) closeDoneLocked() { + if p.donec == nil { + return + } + // Close if unclosed. This isn't racy since we always + // hold p.mu while closing. + select { + case <-p.donec: + default: + close(p.donec) + } +} + +// Err returns the error (if any) first set by BreakWithError or CloseWithError. +func (p *pipe) Err() error { + p.mu.Lock() + defer p.mu.Unlock() + if p.breakErr != nil { + return p.breakErr + } + return p.err +} + +// Done returns a channel which is closed if and when this pipe is closed +// with CloseWithError. +func (p *pipe) Done() <-chan struct{} { + p.mu.Lock() + defer p.mu.Unlock() + if p.donec == nil { + p.donec = make(chan struct{}) + if p.err != nil || p.breakErr != nil { + // Already hit an error. + p.closeDoneLocked() + } + } + return p.donec +} diff --git a/backend/vendor/github.com/enetx/http2/server.go b/backend/vendor/github.com/enetx/http2/server.go new file mode 100644 index 0000000..0122da7 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/server.go @@ -0,0 +1,3341 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// TODO: turn off the serve goroutine when idle, so +// an idle conn only has the readFrames goroutine active. (which could +// also be optimized probably to pin less memory in crypto/tls). This +// would involve tracking when the serve goroutine is active (atomic +// int32 read/CAS probably?) and starting it up when frames arrive, +// and shutting it down when all handlers exit. the occasional PING +// packets could use time.AfterFunc to call sc.wakeStartServeLoop() +// (which is a no-op if already running) and then queue the PING write +// as normal. The serve loop would then exit in most cases (if no +// Handlers running) and not be woken up again until the PING packet +// returns. + +// TODO (maybe): add a mechanism for Handlers to going into +// half-closed-local mode (rw.(io.Closer) test?) but not exit their +// handler, and continue to be able to read from the +// Request.Body. This would be a somewhat semantic change from HTTP/1 +// (or at least what we expose in net/http), so I'd probably want to +// add it there too. For now, this package says that returning from +// the Handler ServeHTTP function means you're both done reading and +// done writing, without a way to stop just one or the other. + +package http2 + +import ( + "bufio" + "bytes" + "context" + "crypto/rand" + "crypto/tls" + "errors" + "fmt" + "io" + "log" + "math" + "net" + "net/textproto" + "net/url" + "os" + "reflect" + "runtime" + "strconv" + "strings" + "sync" + "time" + + "github.com/enetx/http" + "golang.org/x/net/http/httpguts" + "golang.org/x/net/http2/hpack" + "github.com/enetx/http2/httpcommon" +) + +const ( + prefaceTimeout = 10 * time.Second + firstSettingsTimeout = 2 * time.Second // should be in-flight with preface anyway + handlerChunkWriteSize = 4 << 10 + defaultMaxStreams = 250 // TODO: make this 100 as the GFE seems to? + + // maxQueuedControlFrames is the maximum number of control frames like + // SETTINGS, PING and RST_STREAM that will be queued for writing before + // the connection is closed to prevent memory exhaustion attacks. + maxQueuedControlFrames = 10000 +) + +var ( + errClientDisconnected = errors.New("client disconnected") + errClosedBody = errors.New("body closed by handler") + errHandlerComplete = errors.New("http2: request body closed due to handler exiting") + errStreamClosed = errors.New("http2: stream closed") +) + +var responseWriterStatePool = sync.Pool{ + New: func() interface{} { + rws := &responseWriterState{} + rws.bw = bufio.NewWriterSize(chunkWriter{rws}, handlerChunkWriteSize) + return rws + }, +} + +// Test hooks. +var ( + testHookOnConn func() + testHookGetServerConn func(*serverConn) + testHookOnPanicMu *sync.Mutex // nil except in tests + testHookOnPanic func(sc *serverConn, panicVal interface{}) (rePanic bool) +) + +// Server is an HTTP/2 server. +type Server struct { + // MaxHandlers limits the number of http.Handler ServeHTTP goroutines + // which may run at a time over all connections. + // Negative or zero no limit. + // TODO: implement + MaxHandlers int + + // MaxConcurrentStreams optionally specifies the number of + // concurrent streams that each client may have open at a + // time. This is unrelated to the number of http.Handler goroutines + // which may be active globally, which is MaxHandlers. + // If zero, MaxConcurrentStreams defaults to at least 100, per + // the HTTP/2 spec's recommendations. + MaxConcurrentStreams uint32 + + // MaxDecoderHeaderTableSize optionally specifies the http2 + // SETTINGS_HEADER_TABLE_SIZE to send in the initial settings frame. It + // informs the remote endpoint of the maximum size of the header compression + // table used to decode header blocks, in octets. If zero, the default value + // of 4096 is used. + MaxDecoderHeaderTableSize uint32 + + // MaxEncoderHeaderTableSize optionally specifies an upper limit for the + // header compression table used for encoding request headers. Received + // SETTINGS_HEADER_TABLE_SIZE settings are capped at this limit. If zero, + // the default value of 4096 is used. + MaxEncoderHeaderTableSize uint32 + + // MaxReadFrameSize optionally specifies the largest frame + // this server is willing to read. A valid value is between + // 16k and 16M, inclusive. If zero or otherwise invalid, a + // default value is used. + MaxReadFrameSize uint32 + + // PermitProhibitedCipherSuites, if true, permits the use of + // cipher suites prohibited by the HTTP/2 spec. + PermitProhibitedCipherSuites bool + + // IdleTimeout specifies how long until idle clients should be + // closed with a GOAWAY frame. PING frames are not considered + // activity for the purposes of IdleTimeout. + // If zero or negative, there is no timeout. + IdleTimeout time.Duration + + // ReadIdleTimeout is the timeout after which a health check using a ping + // frame will be carried out if no frame is received on the connection. + // If zero, no health check is performed. + ReadIdleTimeout time.Duration + + // PingTimeout is the timeout after which the connection will be closed + // if a response to a ping is not received. + // If zero, a default of 15 seconds is used. + PingTimeout time.Duration + + // WriteByteTimeout is the timeout after which a connection will be + // closed if no data can be written to it. The timeout begins when data is + // available to write, and is extended whenever any bytes are written. + // If zero or negative, there is no timeout. + WriteByteTimeout time.Duration + + // MaxUploadBufferPerConnection is the size of the initial flow + // control window for each connections. The HTTP/2 spec does not + // allow this to be smaller than 65535 or larger than 2^32-1. + // If the value is outside this range, a default value will be + // used instead. + MaxUploadBufferPerConnection int32 + + // MaxUploadBufferPerStream is the size of the initial flow control + // window for each stream. The HTTP/2 spec does not allow this to + // be larger than 2^32-1. If the value is zero or larger than the + // maximum, a default value will be used instead. + MaxUploadBufferPerStream int32 + + // NewWriteScheduler constructs a write scheduler for a connection. + // If nil, a default scheduler is chosen. + NewWriteScheduler func() WriteScheduler + + // CountError, if non-nil, is called on HTTP/2 server errors. + // It's intended to increment a metric for monitoring, such + // as an expvar or Prometheus metric. + // The errType consists of only ASCII word characters. + CountError func(errType string) + + // Internal state. This is a pointer (rather than embedded directly) + // so that we don't embed a Mutex in this struct, which will make the + // struct non-copyable, which might break some callers. + state *serverInternalState +} + +type serverInternalState struct { + mu sync.Mutex + activeConns map[*serverConn]struct{} + + // Pool of error channels. This is per-Server rather than global + // because channels can't be reused across synctest bubbles. + errChanPool sync.Pool +} + +func (s *serverInternalState) registerConn(sc *serverConn) { + if s == nil { + return // if the Server was used without calling ConfigureServer + } + s.mu.Lock() + s.activeConns[sc] = struct{}{} + s.mu.Unlock() +} + +func (s *serverInternalState) unregisterConn(sc *serverConn) { + if s == nil { + return // if the Server was used without calling ConfigureServer + } + s.mu.Lock() + delete(s.activeConns, sc) + s.mu.Unlock() +} + +func (s *serverInternalState) startGracefulShutdown() { + if s == nil { + return // if the Server was used without calling ConfigureServer + } + s.mu.Lock() + for sc := range s.activeConns { + sc.startGracefulShutdown() + } + s.mu.Unlock() +} + +// Global error channel pool used for uninitialized Servers. +// We use a per-Server pool when possible to avoid using channels across synctest bubbles. +var errChanPool = sync.Pool{ + New: func() any { return make(chan error, 1) }, +} + +func (s *serverInternalState) getErrChan() chan error { + if s == nil { + return errChanPool.Get().(chan error) // Server used without calling ConfigureServer + } + return s.errChanPool.Get().(chan error) +} + +func (s *serverInternalState) putErrChan(ch chan error) { + if s == nil { + errChanPool.Put(ch) // Server used without calling ConfigureServer + return + } + s.errChanPool.Put(ch) +} + +// ConfigureServer adds HTTP/2 support to a net/http Server. +// +// The configuration conf may be nil. +// +// ConfigureServer must be called before s begins serving. +func ConfigureServer(s *http.Server, conf *Server) error { + if s == nil { + panic("nil *http.Server") + } + if conf == nil { + conf = new(Server) + } + conf.state = &serverInternalState{ + activeConns: make(map[*serverConn]struct{}), + errChanPool: sync.Pool{New: func() any { return make(chan error, 1) }}, + } + if h1, h2 := s, conf; h2.IdleTimeout == 0 { + if h1.IdleTimeout != 0 { + h2.IdleTimeout = h1.IdleTimeout + } else { + h2.IdleTimeout = h1.ReadTimeout + } + } + s.RegisterOnShutdown(conf.state.startGracefulShutdown) + + if s.TLSConfig == nil { + s.TLSConfig = new(tls.Config) + } else if s.TLSConfig.CipherSuites != nil && s.TLSConfig.MinVersion < tls.VersionTLS13 { + // If they already provided a TLS 1.0–1.2 CipherSuite list, return an + // error if it is missing ECDHE_RSA_WITH_AES_128_GCM_SHA256 or + // ECDHE_ECDSA_WITH_AES_128_GCM_SHA256. + haveRequired := false + for _, cs := range s.TLSConfig.CipherSuites { + switch cs { + case tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + // Alternative MTI cipher to not discourage ECDSA-only servers. + // See http://golang.org/cl/30721 for further information. + tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256: + haveRequired = true + } + } + if !haveRequired { + return fmt.Errorf("http2: TLSConfig.CipherSuites is missing an HTTP/2-required AES_128_GCM_SHA256 cipher (need at least one of TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 or TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256)") + } + } + + // Note: not setting MinVersion to tls.VersionTLS12, + // as we don't want to interfere with HTTP/1.1 traffic + // on the user's server. We enforce TLS 1.2 later once + // we accept a connection. Ideally this should be done + // during next-proto selection, but using TLS <1.2 with + // HTTP/2 is still the client's bug. + + s.TLSConfig.PreferServerCipherSuites = true + + if !strSliceContains(s.TLSConfig.NextProtos, NextProtoTLS) { + s.TLSConfig.NextProtos = append(s.TLSConfig.NextProtos, NextProtoTLS) + } + if !strSliceContains(s.TLSConfig.NextProtos, "http/1.1") { + s.TLSConfig.NextProtos = append(s.TLSConfig.NextProtos, "http/1.1") + } + + if s.TLSNextProto == nil { + s.TLSNextProto = map[string]func(*http.Server, *tls.Conn, http.Handler){} + } + protoHandler := func(hs *http.Server, c net.Conn, h http.Handler, sawClientPreface bool) { + if testHookOnConn != nil { + testHookOnConn() + } + // The TLSNextProto interface predates contexts, so + // the net/http package passes down its per-connection + // base context via an exported but unadvertised + // method on the Handler. This is for internal + // net/http<=>http2 use only. + var ctx context.Context + type baseContexter interface { + BaseContext() context.Context + } + if bc, ok := h.(baseContexter); ok { + ctx = bc.BaseContext() + } + conf.ServeConn(c, &ServeConnOpts{ + Context: ctx, + Handler: h, + BaseConfig: hs, + SawClientPreface: sawClientPreface, + }) + } + s.TLSNextProto[NextProtoTLS] = func(hs *http.Server, c *tls.Conn, h http.Handler) { + protoHandler(hs, c, h, false) + } + // The "unencrypted_http2" TLSNextProto key is used to pass off non-TLS HTTP/2 conns. + // + // A connection passed in this method has already had the HTTP/2 preface read from it. + s.TLSNextProto[nextProtoUnencryptedHTTP2] = func(hs *http.Server, c *tls.Conn, h http.Handler) { + nc, err := unencryptedNetConnFromTLSConn(c) + if err != nil { + if lg := hs.ErrorLog; lg != nil { + lg.Print(err) + } else { + log.Print(err) + } + go c.Close() + return + } + protoHandler(hs, nc, h, true) + } + return nil +} + +// ServeConnOpts are options for the Server.ServeConn method. +type ServeConnOpts struct { + // Context is the base context to use. + // If nil, context.Background is used. + Context context.Context + + // BaseConfig optionally sets the base configuration + // for values. If nil, defaults are used. + BaseConfig *http.Server + + // Handler specifies which handler to use for processing + // requests. If nil, BaseConfig.Handler is used. If BaseConfig + // or BaseConfig.Handler is nil, http.DefaultServeMux is used. + Handler http.Handler + + // UpgradeRequest is an initial request received on a connection + // undergoing an h2c upgrade. The request body must have been + // completely read from the connection before calling ServeConn, + // and the 101 Switching Protocols response written. + UpgradeRequest *http.Request + + // Settings is the decoded contents of the HTTP2-Settings header + // in an h2c upgrade request. + Settings []byte + + // SawClientPreface is set if the HTTP/2 connection preface + // has already been read from the connection. + SawClientPreface bool +} + +func (o *ServeConnOpts) context() context.Context { + if o != nil && o.Context != nil { + return o.Context + } + return context.Background() +} + +func (o *ServeConnOpts) baseConfig() *http.Server { + if o != nil && o.BaseConfig != nil { + return o.BaseConfig + } + return new(http.Server) +} + +func (o *ServeConnOpts) handler() http.Handler { + if o != nil { + if o.Handler != nil { + return o.Handler + } + if o.BaseConfig != nil && o.BaseConfig.Handler != nil { + return o.BaseConfig.Handler + } + } + return http.DefaultServeMux +} + +// ServeConn serves HTTP/2 requests on the provided connection and +// blocks until the connection is no longer readable. +// +// ServeConn starts speaking HTTP/2 assuming that c has not had any +// reads or writes. It writes its initial settings frame and expects +// to be able to read the preface and settings frame from the +// client. If c has a ConnectionState method like a *tls.Conn, the +// ConnectionState is used to verify the TLS ciphersuite and to set +// the Request.TLS field in Handlers. +// +// ServeConn does not support h2c by itself. Any h2c support must be +// implemented in terms of providing a suitably-behaving net.Conn. +// +// The opts parameter is optional. If nil, default values are used. +func (s *Server) ServeConn(c net.Conn, opts *ServeConnOpts) { + if opts == nil { + opts = &ServeConnOpts{} + } + s.serveConn(c, opts, nil) +} + +func (s *Server) serveConn(c net.Conn, opts *ServeConnOpts, newf func(*serverConn)) { + baseCtx, cancel := serverConnBaseContext(c, opts) + defer cancel() + + http1srv := opts.baseConfig() + conf := configFromServer(http1srv, s) + sc := &serverConn{ + srv: s, + hs: http1srv, + conn: c, + baseCtx: baseCtx, + remoteAddrStr: c.RemoteAddr().String(), + bw: newBufferedWriter(c, conf.WriteByteTimeout), + handler: opts.handler(), + streams: make(map[uint32]*stream), + readFrameCh: make(chan readFrameResult), + wantWriteFrameCh: make(chan FrameWriteRequest, 8), + serveMsgCh: make(chan interface{}, 8), + wroteFrameCh: make(chan frameWriteResult, 1), // buffered; one send in writeFrameAsync + bodyReadCh: make(chan bodyReadMsg), // buffering doesn't matter either way + doneServing: make(chan struct{}), + clientMaxStreams: math.MaxUint32, // Section 6.5.2: "Initially, there is no limit to this value" + advMaxStreams: conf.MaxConcurrentStreams, + initialStreamSendWindowSize: initialWindowSize, + initialStreamRecvWindowSize: conf.MaxUploadBufferPerStream, + maxFrameSize: initialMaxFrameSize, + pingTimeout: conf.PingTimeout, + countErrorFunc: conf.CountError, + serveG: newGoroutineLock(), + pushEnabled: true, + sawClientPreface: opts.SawClientPreface, + } + if newf != nil { + newf(sc) + } + + s.state.registerConn(sc) + defer s.state.unregisterConn(sc) + + // The net/http package sets the write deadline from the + // http.Server.WriteTimeout during the TLS handshake, but then + // passes the connection off to us with the deadline already set. + // Write deadlines are set per stream in serverConn.newStream. + // Disarm the net.Conn write deadline here. + if sc.hs.WriteTimeout > 0 { + sc.conn.SetWriteDeadline(time.Time{}) + } + + if s.NewWriteScheduler != nil { + sc.writeSched = s.NewWriteScheduler() + } else { + sc.writeSched = newRoundRobinWriteScheduler() + } + + // These start at the RFC-specified defaults. If there is a higher + // configured value for inflow, that will be updated when we send a + // WINDOW_UPDATE shortly after sending SETTINGS. + sc.flow.add(initialWindowSize) + sc.inflow.init(initialWindowSize) + sc.hpackEncoder = hpack.NewEncoder(&sc.headerWriteBuf) + sc.hpackEncoder.SetMaxDynamicTableSizeLimit(conf.MaxEncoderHeaderTableSize) + + fr := NewFramer(sc.bw, c) + if conf.CountError != nil { + fr.countError = conf.CountError + } + fr.ReadMetaHeaders = hpack.NewDecoder(conf.MaxDecoderHeaderTableSize, nil) + fr.MaxHeaderListSize = sc.maxHeaderListSize() + fr.SetMaxReadFrameSize(conf.MaxReadFrameSize) + sc.framer = fr + + if tc, ok := c.(connectionStater); ok { + sc.tlsState = new(tls.ConnectionState) + *sc.tlsState = tc.ConnectionState() + // 9.2 Use of TLS Features + // An implementation of HTTP/2 over TLS MUST use TLS + // 1.2 or higher with the restrictions on feature set + // and cipher suite described in this section. Due to + // implementation limitations, it might not be + // possible to fail TLS negotiation. An endpoint MUST + // immediately terminate an HTTP/2 connection that + // does not meet the TLS requirements described in + // this section with a connection error (Section + // 5.4.1) of type INADEQUATE_SECURITY. + if sc.tlsState.Version < tls.VersionTLS12 { + sc.rejectConn(ErrCodeInadequateSecurity, "TLS version too low") + return + } + + if sc.tlsState.ServerName == "" { + // Client must use SNI, but we don't enforce that anymore, + // since it was causing problems when connecting to bare IP + // addresses during development. + // + // TODO: optionally enforce? Or enforce at the time we receive + // a new request, and verify the ServerName matches the :authority? + // But that precludes proxy situations, perhaps. + // + // So for now, do nothing here again. + } + + if !conf.PermitProhibitedCipherSuites && isBadCipher(sc.tlsState.CipherSuite) { + // "Endpoints MAY choose to generate a connection error + // (Section 5.4.1) of type INADEQUATE_SECURITY if one of + // the prohibited cipher suites are negotiated." + // + // We choose that. In my opinion, the spec is weak + // here. It also says both parties must support at least + // TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 so there's no + // excuses here. If we really must, we could allow an + // "AllowInsecureWeakCiphers" option on the server later. + // Let's see how it plays out first. + sc.rejectConn(ErrCodeInadequateSecurity, fmt.Sprintf("Prohibited TLS 1.2 Cipher Suite: %x", sc.tlsState.CipherSuite)) + return + } + } + + if opts.Settings != nil { + fr := &SettingsFrame{ + FrameHeader: FrameHeader{valid: true}, + p: opts.Settings, + } + if err := fr.ForeachSetting(sc.processSetting); err != nil { + sc.rejectConn(ErrCodeProtocol, "invalid settings") + return + } + opts.Settings = nil + } + + if hook := testHookGetServerConn; hook != nil { + hook(sc) + } + + if opts.UpgradeRequest != nil { + sc.upgradeRequest(opts.UpgradeRequest) + opts.UpgradeRequest = nil + } + + sc.serve(conf) +} + +func serverConnBaseContext(c net.Conn, opts *ServeConnOpts) (ctx context.Context, cancel func()) { + ctx, cancel = context.WithCancel(opts.context()) + ctx = context.WithValue(ctx, http.LocalAddrContextKey, c.LocalAddr()) + if hs := opts.baseConfig(); hs != nil { + ctx = context.WithValue(ctx, http.ServerContextKey, hs) + } + return +} + +func (sc *serverConn) rejectConn(err ErrCode, debug string) { + sc.vlogf("http2: server rejecting conn: %v, %s", err, debug) + // ignoring errors. hanging up anyway. + sc.framer.WriteGoAway(0, err, []byte(debug)) + sc.bw.Flush() + sc.conn.Close() +} + +type serverConn struct { + // Immutable: + srv *Server + hs *http.Server + conn net.Conn + bw *bufferedWriter // writing to conn + handler http.Handler + baseCtx context.Context + framer *Framer + doneServing chan struct{} // closed when serverConn.serve ends + readFrameCh chan readFrameResult // written by serverConn.readFrames + wantWriteFrameCh chan FrameWriteRequest // from handlers -> serve + wroteFrameCh chan frameWriteResult // from writeFrameAsync -> serve, tickles more frame writes + bodyReadCh chan bodyReadMsg // from handlers -> serve + serveMsgCh chan interface{} // misc messages & code to send to / run on the serve loop + flow outflow // conn-wide (not stream-specific) outbound flow control + inflow inflow // conn-wide inbound flow control + tlsState *tls.ConnectionState // shared by all handlers, like net/http + remoteAddrStr string + writeSched WriteScheduler + countErrorFunc func(errType string) + + // Everything following is owned by the serve loop; use serveG.check(): + serveG goroutineLock // used to verify funcs are on serve() + pushEnabled bool + sawClientPreface bool // preface has already been read, used in h2c upgrade + sawFirstSettings bool // got the initial SETTINGS frame after the preface + needToSendSettingsAck bool + unackedSettings int // how many SETTINGS have we sent without ACKs? + queuedControlFrames int // control frames in the writeSched queue + clientMaxStreams uint32 // SETTINGS_MAX_CONCURRENT_STREAMS from client (our PUSH_PROMISE limit) + advMaxStreams uint32 // our SETTINGS_MAX_CONCURRENT_STREAMS advertised the client + curClientStreams uint32 // number of open streams initiated by the client + curPushedStreams uint32 // number of open streams initiated by server push + curHandlers uint32 // number of running handler goroutines + maxClientStreamID uint32 // max ever seen from client (odd), or 0 if there have been no client requests + maxPushPromiseID uint32 // ID of the last push promise (even), or 0 if there have been no pushes + streams map[uint32]*stream + unstartedHandlers []unstartedHandler + initialStreamSendWindowSize int32 + initialStreamRecvWindowSize int32 + maxFrameSize int32 + peerMaxHeaderListSize uint32 // zero means unknown (default) + canonHeader map[string]string // http2-lower-case -> Go-Canonical-Case + canonHeaderKeysSize int // canonHeader keys size in bytes + writingFrame bool // started writing a frame (on serve goroutine or separate) + writingFrameAsync bool // started a frame on its own goroutine but haven't heard back on wroteFrameCh + needsFrameFlush bool // last frame write wasn't a flush + inGoAway bool // we've started to or sent GOAWAY + inFrameScheduleLoop bool // whether we're in the scheduleFrameWrite loop + needToSendGoAway bool // we need to schedule a GOAWAY frame write + pingSent bool + sentPingData [8]byte + goAwayCode ErrCode + shutdownTimer *time.Timer // nil until used + idleTimer *time.Timer // nil if unused + readIdleTimeout time.Duration + pingTimeout time.Duration + readIdleTimer *time.Timer // nil if unused + + // Owned by the writeFrameAsync goroutine: + headerWriteBuf bytes.Buffer + hpackEncoder *hpack.Encoder + + // Used by startGracefulShutdown. + shutdownOnce sync.Once +} + +func (sc *serverConn) maxHeaderListSize() uint32 { + n := sc.hs.MaxHeaderBytes + if n <= 0 { + n = http.DefaultMaxHeaderBytes + } + return uint32(adjustHTTP1MaxHeaderSize(int64(n))) +} + +func (sc *serverConn) curOpenStreams() uint32 { + sc.serveG.check() + return sc.curClientStreams + sc.curPushedStreams +} + +// stream represents a stream. This is the minimal metadata needed by +// the serve goroutine. Most of the actual stream state is owned by +// the http.Handler's goroutine in the responseWriter. Because the +// responseWriter's responseWriterState is recycled at the end of a +// handler, this struct intentionally has no pointer to the +// *responseWriter{,State} itself, as the Handler ending nils out the +// responseWriter's state field. +type stream struct { + // immutable: + sc *serverConn + id uint32 + body *pipe // non-nil if expecting DATA frames + cw closeWaiter // closed wait stream transitions to closed state + ctx context.Context + cancelCtx func() + + // owned by serverConn's serve loop: + bodyBytes int64 // body bytes seen so far + declBodyBytes int64 // or -1 if undeclared + flow outflow // limits writing from Handler to client + inflow inflow // what the client is allowed to POST/etc to us + state streamState + resetQueued bool // RST_STREAM queued for write; set by sc.resetStream + gotTrailerHeader bool // HEADER frame for trailers was seen + wroteHeaders bool // whether we wrote headers (not status 100) + readDeadline *time.Timer // nil if unused + writeDeadline *time.Timer // nil if unused + closeErr error // set before cw is closed + + trailer http.Header // accumulated trailers + reqTrailer http.Header // handler's Request.Trailer +} + +func (sc *serverConn) Framer() *Framer { return sc.framer } +func (sc *serverConn) CloseConn() error { return sc.conn.Close() } +func (sc *serverConn) Flush() error { return sc.bw.Flush() } +func (sc *serverConn) HeaderEncoder() (*hpack.Encoder, *bytes.Buffer) { + return sc.hpackEncoder, &sc.headerWriteBuf +} + +func (sc *serverConn) state(streamID uint32) (streamState, *stream) { + sc.serveG.check() + // http://tools.ietf.org/html/rfc7540#section-5.1 + if st, ok := sc.streams[streamID]; ok { + return st.state, st + } + // "The first use of a new stream identifier implicitly closes all + // streams in the "idle" state that might have been initiated by + // that peer with a lower-valued stream identifier. For example, if + // a client sends a HEADERS frame on stream 7 without ever sending a + // frame on stream 5, then stream 5 transitions to the "closed" + // state when the first frame for stream 7 is sent or received." + if streamID%2 == 1 { + if streamID <= sc.maxClientStreamID { + return stateClosed, nil + } + } else { + if streamID <= sc.maxPushPromiseID { + return stateClosed, nil + } + } + return stateIdle, nil +} + +// setConnState calls the net/http ConnState hook for this connection, if configured. +// Note that the net/http package does StateNew and StateClosed for us. +// There is currently no plan for StateHijacked or hijacking HTTP/2 connections. +func (sc *serverConn) setConnState(state http.ConnState) { + if sc.hs.ConnState != nil { + sc.hs.ConnState(sc.conn, state) + } +} + +func (sc *serverConn) vlogf(format string, args ...interface{}) { + if VerboseLogs { + sc.logf(format, args...) + } +} + +func (sc *serverConn) logf(format string, args ...interface{}) { + if lg := sc.hs.ErrorLog; lg != nil { + lg.Printf(format, args...) + } else { + log.Printf(format, args...) + } +} + +// errno returns v's underlying uintptr, else 0. +// +// TODO: remove this helper function once http2 can use build +// tags. See comment in isClosedConnError. +func errno(v error) uintptr { + if rv := reflect.ValueOf(v); rv.Kind() == reflect.Uintptr { + return uintptr(rv.Uint()) + } + return 0 +} + +// isClosedConnError reports whether err is an error from use of a closed +// network connection. +func isClosedConnError(err error) bool { + if err == nil { + return false + } + + if errors.Is(err, net.ErrClosed) { + return true + } + + // TODO(bradfitz): x/tools/cmd/bundle doesn't really support + // build tags, so I can't make an http2_windows.go file with + // Windows-specific stuff. Fix that and move this, once we + // have a way to bundle this into std's net/http somehow. + if runtime.GOOS == "windows" { + if oe, ok := err.(*net.OpError); ok && oe.Op == "read" { + if se, ok := oe.Err.(*os.SyscallError); ok && se.Syscall == "wsarecv" { + const WSAECONNABORTED = 10053 + const WSAECONNRESET = 10054 + if n := errno(se.Err); n == WSAECONNRESET || n == WSAECONNABORTED { + return true + } + } + } + } + return false +} + +func (sc *serverConn) condlogf(err error, format string, args ...interface{}) { + if err == nil { + return + } + if err == io.EOF || err == io.ErrUnexpectedEOF || isClosedConnError(err) || err == errPrefaceTimeout { + // Boring, expected errors. + sc.vlogf(format, args...) + } else { + sc.logf(format, args...) + } +} + +// maxCachedCanonicalHeadersKeysSize is an arbitrarily-chosen limit on the size +// of the entries in the canonHeader cache. +// This should be larger than the size of unique, uncommon header keys likely to +// be sent by the peer, while not so high as to permit unreasonable memory usage +// if the peer sends an unbounded number of unique header keys. +const maxCachedCanonicalHeadersKeysSize = 2048 + +func (sc *serverConn) canonicalHeader(v string) string { + sc.serveG.check() + cv, ok := httpcommon.CachedCanonicalHeader(v) + if ok { + return cv + } + cv, ok = sc.canonHeader[v] + if ok { + return cv + } + if sc.canonHeader == nil { + sc.canonHeader = make(map[string]string) + } + cv = http.CanonicalHeaderKey(v) + size := 100 + len(v)*2 // 100 bytes of map overhead + key + value + if sc.canonHeaderKeysSize+size <= maxCachedCanonicalHeadersKeysSize { + sc.canonHeader[v] = cv + sc.canonHeaderKeysSize += size + } + return cv +} + +type readFrameResult struct { + f Frame // valid until readMore is called + err error + + // readMore should be called once the consumer no longer needs or + // retains f. After readMore, f is invalid and more frames can be + // read. + readMore func() +} + +// readFrames is the loop that reads incoming frames. +// It takes care to only read one frame at a time, blocking until the +// consumer is done with the frame. +// It's run on its own goroutine. +func (sc *serverConn) readFrames() { + gate := make(chan struct{}) + gateDone := func() { gate <- struct{}{} } + for { + f, err := sc.framer.ReadFrame() + select { + case sc.readFrameCh <- readFrameResult{f, err, gateDone}: + case <-sc.doneServing: + return + } + select { + case <-gate: + case <-sc.doneServing: + return + } + if terminalReadFrameError(err) { + return + } + } +} + +// frameWriteResult is the message passed from writeFrameAsync to the serve goroutine. +type frameWriteResult struct { + _ incomparable + wr FrameWriteRequest // what was written (or attempted) + err error // result of the writeFrame call +} + +// writeFrameAsync runs in its own goroutine and writes a single frame +// and then reports when it's done. +// At most one goroutine can be running writeFrameAsync at a time per +// serverConn. +func (sc *serverConn) writeFrameAsync(wr FrameWriteRequest, wd *writeData) { + var err error + if wd == nil { + err = wr.write.writeFrame(sc) + } else { + err = sc.framer.endWrite() + } + sc.wroteFrameCh <- frameWriteResult{wr: wr, err: err} +} + +func (sc *serverConn) closeAllStreamsOnConnClose() { + sc.serveG.check() + for _, st := range sc.streams { + sc.closeStream(st, errClientDisconnected) + } +} + +func (sc *serverConn) stopShutdownTimer() { + sc.serveG.check() + if t := sc.shutdownTimer; t != nil { + t.Stop() + } +} + +func (sc *serverConn) notePanic() { + // Note: this is for serverConn.serve panicking, not http.Handler code. + if testHookOnPanicMu != nil { + testHookOnPanicMu.Lock() + defer testHookOnPanicMu.Unlock() + } + if testHookOnPanic != nil { + if e := recover(); e != nil { + if testHookOnPanic(sc, e) { + panic(e) + } + } + } +} + +func (sc *serverConn) serve(conf http2Config) { + sc.serveG.check() + defer sc.notePanic() + defer sc.conn.Close() + defer sc.closeAllStreamsOnConnClose() + defer sc.stopShutdownTimer() + defer close(sc.doneServing) // unblocks handlers trying to send + + if VerboseLogs { + sc.vlogf("http2: server connection from %v on %p", sc.conn.RemoteAddr(), sc.hs) + } + + settings := writeSettings{ + {SettingMaxFrameSize, conf.MaxReadFrameSize}, + {SettingMaxConcurrentStreams, sc.advMaxStreams}, + {SettingMaxHeaderListSize, sc.maxHeaderListSize()}, + {SettingHeaderTableSize, conf.MaxDecoderHeaderTableSize}, + {SettingInitialWindowSize, uint32(sc.initialStreamRecvWindowSize)}, + } + if !disableExtendedConnectProtocol { + settings = append(settings, Setting{SettingEnableConnectProtocol, 1}) + } + sc.writeFrame(FrameWriteRequest{ + write: settings, + }) + sc.unackedSettings++ + + // Each connection starts with initialWindowSize inflow tokens. + // If a higher value is configured, we add more tokens. + if diff := conf.MaxUploadBufferPerConnection - initialWindowSize; diff > 0 { + sc.sendWindowUpdate(nil, int(diff)) + } + + if err := sc.readPreface(); err != nil { + sc.condlogf(err, "http2: server: error reading preface from client %v: %v", sc.conn.RemoteAddr(), err) + return + } + // Now that we've got the preface, get us out of the + // "StateNew" state. We can't go directly to idle, though. + // Active means we read some data and anticipate a request. We'll + // do another Active when we get a HEADERS frame. + sc.setConnState(http.StateActive) + sc.setConnState(http.StateIdle) + + if sc.srv.IdleTimeout > 0 { + sc.idleTimer = time.AfterFunc(sc.srv.IdleTimeout, sc.onIdleTimer) + defer sc.idleTimer.Stop() + } + + if conf.SendPingTimeout > 0 { + sc.readIdleTimeout = conf.SendPingTimeout + sc.readIdleTimer = time.AfterFunc(conf.SendPingTimeout, sc.onReadIdleTimer) + defer sc.readIdleTimer.Stop() + } + + go sc.readFrames() // closed by defer sc.conn.Close above + + settingsTimer := time.AfterFunc(firstSettingsTimeout, sc.onSettingsTimer) + defer settingsTimer.Stop() + + lastFrameTime := time.Now() + loopNum := 0 + for { + loopNum++ + select { + case wr := <-sc.wantWriteFrameCh: + if se, ok := wr.write.(StreamError); ok { + sc.resetStream(se) + break + } + sc.writeFrame(wr) + case res := <-sc.wroteFrameCh: + sc.wroteFrame(res) + case res := <-sc.readFrameCh: + lastFrameTime = time.Now() + // Process any written frames before reading new frames from the client since a + // written frame could have triggered a new stream to be started. + if sc.writingFrameAsync { + select { + case wroteRes := <-sc.wroteFrameCh: + sc.wroteFrame(wroteRes) + default: + } + } + if !sc.processFrameFromReader(res) { + return + } + res.readMore() + if settingsTimer != nil { + settingsTimer.Stop() + settingsTimer = nil + } + case m := <-sc.bodyReadCh: + sc.noteBodyRead(m.st, m.n) + case msg := <-sc.serveMsgCh: + switch v := msg.(type) { + case func(int): + v(loopNum) // for testing + case *serverMessage: + switch v { + case settingsTimerMsg: + sc.logf("timeout waiting for SETTINGS frames from %v", sc.conn.RemoteAddr()) + return + case idleTimerMsg: + sc.vlogf("connection is idle") + sc.goAway(ErrCodeNo) + case readIdleTimerMsg: + sc.handlePingTimer(lastFrameTime) + case shutdownTimerMsg: + sc.vlogf("GOAWAY close timer fired; closing conn from %v", sc.conn.RemoteAddr()) + return + case gracefulShutdownMsg: + sc.startGracefulShutdownInternal() + case handlerDoneMsg: + sc.handlerDone() + default: + panic("unknown timer") + } + case *startPushRequest: + sc.startPush(v) + case func(*serverConn): + v(sc) + default: + panic(fmt.Sprintf("unexpected type %T", v)) + } + } + + // If the peer is causing us to generate a lot of control frames, + // but not reading them from us, assume they are trying to make us + // run out of memory. + if sc.queuedControlFrames > maxQueuedControlFrames { + sc.vlogf("http2: too many control frames in send queue, closing connection") + return + } + + // Start the shutdown timer after sending a GOAWAY. When sending GOAWAY + // with no error code (graceful shutdown), don't start the timer until + // all open streams have been completed. + sentGoAway := sc.inGoAway && !sc.needToSendGoAway && !sc.writingFrame + gracefulShutdownComplete := sc.goAwayCode == ErrCodeNo && sc.curOpenStreams() == 0 + if sentGoAway && sc.shutdownTimer == nil && (sc.goAwayCode != ErrCodeNo || gracefulShutdownComplete) { + sc.shutDownIn(goAwayTimeout) + } + } +} + +func (sc *serverConn) handlePingTimer(lastFrameReadTime time.Time) { + if sc.pingSent { + sc.logf("timeout waiting for PING response") + if f := sc.countErrorFunc; f != nil { + f("conn_close_lost_ping") + } + sc.conn.Close() + return + } + + pingAt := lastFrameReadTime.Add(sc.readIdleTimeout) + now := time.Now() + if pingAt.After(now) { + // We received frames since arming the ping timer. + // Reset it for the next possible timeout. + sc.readIdleTimer.Reset(pingAt.Sub(now)) + return + } + + sc.pingSent = true + // Ignore crypto/rand.Read errors: It generally can't fail, and worse case if it does + // is we send a PING frame containing 0s. + _, _ = rand.Read(sc.sentPingData[:]) + sc.writeFrame(FrameWriteRequest{ + write: &writePing{data: sc.sentPingData}, + }) + sc.readIdleTimer.Reset(sc.pingTimeout) +} + +type serverMessage int + +// Message values sent to serveMsgCh. +var ( + settingsTimerMsg = new(serverMessage) + idleTimerMsg = new(serverMessage) + readIdleTimerMsg = new(serverMessage) + shutdownTimerMsg = new(serverMessage) + gracefulShutdownMsg = new(serverMessage) + handlerDoneMsg = new(serverMessage) +) + +func (sc *serverConn) onSettingsTimer() { sc.sendServeMsg(settingsTimerMsg) } +func (sc *serverConn) onIdleTimer() { sc.sendServeMsg(idleTimerMsg) } +func (sc *serverConn) onReadIdleTimer() { sc.sendServeMsg(readIdleTimerMsg) } +func (sc *serverConn) onShutdownTimer() { sc.sendServeMsg(shutdownTimerMsg) } + +func (sc *serverConn) sendServeMsg(msg interface{}) { + sc.serveG.checkNotOn() // NOT + select { + case sc.serveMsgCh <- msg: + case <-sc.doneServing: + } +} + +var errPrefaceTimeout = errors.New("timeout waiting for client preface") + +// readPreface reads the ClientPreface greeting from the peer or +// returns errPrefaceTimeout on timeout, or an error if the greeting +// is invalid. +func (sc *serverConn) readPreface() error { + if sc.sawClientPreface { + return nil + } + errc := make(chan error, 1) + go func() { + // Read the client preface + buf := make([]byte, len(ClientPreface)) + if _, err := io.ReadFull(sc.conn, buf); err != nil { + errc <- err + } else if !bytes.Equal(buf, clientPreface) { + errc <- fmt.Errorf("bogus greeting %q", buf) + } else { + errc <- nil + } + }() + timer := time.NewTimer(prefaceTimeout) // TODO: configurable on *Server? + defer timer.Stop() + select { + case <-timer.C: + return errPrefaceTimeout + case err := <-errc: + if err == nil { + if VerboseLogs { + sc.vlogf("http2: server: client %v said hello", sc.conn.RemoteAddr()) + } + } + return err + } +} + +var writeDataPool = sync.Pool{ + New: func() interface{} { return new(writeData) }, +} + +// writeDataFromHandler writes DATA response frames from a handler on +// the given stream. +func (sc *serverConn) writeDataFromHandler(stream *stream, data []byte, endStream bool) error { + ch := sc.srv.state.getErrChan() + writeArg := writeDataPool.Get().(*writeData) + *writeArg = writeData{stream.id, data, endStream} + err := sc.writeFrameFromHandler(FrameWriteRequest{ + write: writeArg, + stream: stream, + done: ch, + }) + if err != nil { + return err + } + var frameWriteDone bool // the frame write is done (successfully or not) + select { + case err = <-ch: + frameWriteDone = true + case <-sc.doneServing: + return errClientDisconnected + case <-stream.cw: + // If both ch and stream.cw were ready (as might + // happen on the final Write after an http.Handler + // ends), prefer the write result. Otherwise this + // might just be us successfully closing the stream. + // The writeFrameAsync and serve goroutines guarantee + // that the ch send will happen before the stream.cw + // close. + select { + case err = <-ch: + frameWriteDone = true + default: + return errStreamClosed + } + } + sc.srv.state.putErrChan(ch) + if frameWriteDone { + writeDataPool.Put(writeArg) + } + return err +} + +// writeFrameFromHandler sends wr to sc.wantWriteFrameCh, but aborts +// if the connection has gone away. +// +// This must not be run from the serve goroutine itself, else it might +// deadlock writing to sc.wantWriteFrameCh (which is only mildly +// buffered and is read by serve itself). If you're on the serve +// goroutine, call writeFrame instead. +func (sc *serverConn) writeFrameFromHandler(wr FrameWriteRequest) error { + sc.serveG.checkNotOn() // NOT + select { + case sc.wantWriteFrameCh <- wr: + return nil + case <-sc.doneServing: + // Serve loop is gone. + // Client has closed their connection to the server. + return errClientDisconnected + } +} + +// writeFrame schedules a frame to write and sends it if there's nothing +// already being written. +// +// There is no pushback here (the serve goroutine never blocks). It's +// the http.Handlers that block, waiting for their previous frames to +// make it onto the wire +// +// If you're not on the serve goroutine, use writeFrameFromHandler instead. +func (sc *serverConn) writeFrame(wr FrameWriteRequest) { + sc.serveG.check() + + // If true, wr will not be written and wr.done will not be signaled. + var ignoreWrite bool + + // We are not allowed to write frames on closed streams. RFC 7540 Section + // 5.1.1 says: "An endpoint MUST NOT send frames other than PRIORITY on + // a closed stream." Our server never sends PRIORITY, so that exception + // does not apply. + // + // The serverConn might close an open stream while the stream's handler + // is still running. For example, the server might close a stream when it + // receives bad data from the client. If this happens, the handler might + // attempt to write a frame after the stream has been closed (since the + // handler hasn't yet been notified of the close). In this case, we simply + // ignore the frame. The handler will notice that the stream is closed when + // it waits for the frame to be written. + // + // As an exception to this rule, we allow sending RST_STREAM after close. + // This allows us to immediately reject new streams without tracking any + // state for those streams (except for the queued RST_STREAM frame). This + // may result in duplicate RST_STREAMs in some cases, but the client should + // ignore those. + if wr.StreamID() != 0 { + _, isReset := wr.write.(StreamError) + if state, _ := sc.state(wr.StreamID()); state == stateClosed && !isReset { + ignoreWrite = true + } + } + + // Don't send a 100-continue response if we've already sent headers. + // See golang.org/issue/14030. + switch wr.write.(type) { + case *writeResHeaders: + wr.stream.wroteHeaders = true + case write100ContinueHeadersFrame: + if wr.stream.wroteHeaders { + // We do not need to notify wr.done because this frame is + // never written with wr.done != nil. + if wr.done != nil { + panic("wr.done != nil for write100ContinueHeadersFrame") + } + ignoreWrite = true + } + } + + if !ignoreWrite { + if wr.isControl() { + sc.queuedControlFrames++ + // For extra safety, detect wraparounds, which should not happen, + // and pull the plug. + if sc.queuedControlFrames < 0 { + sc.conn.Close() + } + } + sc.writeSched.Push(wr) + } + sc.scheduleFrameWrite() +} + +// startFrameWrite starts a goroutine to write wr (in a separate +// goroutine since that might block on the network), and updates the +// serve goroutine's state about the world, updated from info in wr. +func (sc *serverConn) startFrameWrite(wr FrameWriteRequest) { + sc.serveG.check() + if sc.writingFrame { + panic("internal error: can only be writing one frame at a time") + } + + st := wr.stream + if st != nil { + switch st.state { + case stateHalfClosedLocal: + switch wr.write.(type) { + case StreamError, handlerPanicRST, writeWindowUpdate: + // RFC 7540 Section 5.1 allows sending RST_STREAM, PRIORITY, and WINDOW_UPDATE + // in this state. (We never send PRIORITY from the server, so that is not checked.) + default: + panic(fmt.Sprintf("internal error: attempt to send frame on a half-closed-local stream: %v", wr)) + } + case stateClosed: + panic(fmt.Sprintf("internal error: attempt to send frame on a closed stream: %v", wr)) + } + } + if wpp, ok := wr.write.(*writePushPromise); ok { + var err error + wpp.promisedID, err = wpp.allocatePromisedID() + if err != nil { + sc.writingFrameAsync = false + wr.replyToWriter(err) + return + } + } + + sc.writingFrame = true + sc.needsFrameFlush = true + if wr.write.staysWithinBuffer(sc.bw.Available()) { + sc.writingFrameAsync = false + err := wr.write.writeFrame(sc) + sc.wroteFrame(frameWriteResult{wr: wr, err: err}) + } else if wd, ok := wr.write.(*writeData); ok { + // Encode the frame in the serve goroutine, to ensure we don't have + // any lingering asynchronous references to data passed to Write. + // See https://go.dev/issue/58446. + sc.framer.startWriteDataPadded(wd.streamID, wd.endStream, wd.p, nil) + sc.writingFrameAsync = true + go sc.writeFrameAsync(wr, wd) + } else { + sc.writingFrameAsync = true + go sc.writeFrameAsync(wr, nil) + } +} + +// errHandlerPanicked is the error given to any callers blocked in a read from +// Request.Body when the main goroutine panics. Since most handlers read in the +// main ServeHTTP goroutine, this will show up rarely. +var errHandlerPanicked = errors.New("http2: handler panicked") + +// wroteFrame is called on the serve goroutine with the result of +// whatever happened on writeFrameAsync. +func (sc *serverConn) wroteFrame(res frameWriteResult) { + sc.serveG.check() + if !sc.writingFrame { + panic("internal error: expected to be already writing a frame") + } + sc.writingFrame = false + sc.writingFrameAsync = false + + if res.err != nil { + sc.conn.Close() + } + + wr := res.wr + + if writeEndsStream(wr.write) { + st := wr.stream + if st == nil { + panic("internal error: expecting non-nil stream") + } + switch st.state { + case stateOpen: + // Here we would go to stateHalfClosedLocal in + // theory, but since our handler is done and + // the net/http package provides no mechanism + // for closing a ResponseWriter while still + // reading data (see possible TODO at top of + // this file), we go into closed state here + // anyway, after telling the peer we're + // hanging up on them. We'll transition to + // stateClosed after the RST_STREAM frame is + // written. + st.state = stateHalfClosedLocal + // Section 8.1: a server MAY request that the client abort + // transmission of a request without error by sending a + // RST_STREAM with an error code of NO_ERROR after sending + // a complete response. + sc.resetStream(streamError(st.id, ErrCodeNo)) + case stateHalfClosedRemote: + sc.closeStream(st, errHandlerComplete) + } + } else { + switch v := wr.write.(type) { + case StreamError: + // st may be unknown if the RST_STREAM was generated to reject bad input. + if st, ok := sc.streams[v.StreamID]; ok { + sc.closeStream(st, v) + } + case handlerPanicRST: + sc.closeStream(wr.stream, errHandlerPanicked) + } + } + + // Reply (if requested) to unblock the ServeHTTP goroutine. + wr.replyToWriter(res.err) + + sc.scheduleFrameWrite() +} + +// scheduleFrameWrite tickles the frame writing scheduler. +// +// If a frame is already being written, nothing happens. This will be called again +// when the frame is done being written. +// +// If a frame isn't being written and we need to send one, the best frame +// to send is selected by writeSched. +// +// If a frame isn't being written and there's nothing else to send, we +// flush the write buffer. +func (sc *serverConn) scheduleFrameWrite() { + sc.serveG.check() + if sc.writingFrame || sc.inFrameScheduleLoop { + return + } + sc.inFrameScheduleLoop = true + for !sc.writingFrameAsync { + if sc.needToSendGoAway { + sc.needToSendGoAway = false + sc.startFrameWrite(FrameWriteRequest{ + write: &writeGoAway{ + maxStreamID: sc.maxClientStreamID, + code: sc.goAwayCode, + }, + }) + continue + } + if sc.needToSendSettingsAck { + sc.needToSendSettingsAck = false + sc.startFrameWrite(FrameWriteRequest{write: writeSettingsAck{}}) + continue + } + if !sc.inGoAway || sc.goAwayCode == ErrCodeNo { + if wr, ok := sc.writeSched.Pop(); ok { + if wr.isControl() { + sc.queuedControlFrames-- + } + sc.startFrameWrite(wr) + continue + } + } + if sc.needsFrameFlush { + sc.startFrameWrite(FrameWriteRequest{write: flushFrameWriter{}}) + sc.needsFrameFlush = false // after startFrameWrite, since it sets this true + continue + } + break + } + sc.inFrameScheduleLoop = false +} + +// startGracefulShutdown gracefully shuts down a connection. This +// sends GOAWAY with ErrCodeNo to tell the client we're gracefully +// shutting down. The connection isn't closed until all current +// streams are done. +// +// startGracefulShutdown returns immediately; it does not wait until +// the connection has shut down. +func (sc *serverConn) startGracefulShutdown() { + sc.serveG.checkNotOn() // NOT + sc.shutdownOnce.Do(func() { sc.sendServeMsg(gracefulShutdownMsg) }) +} + +// After sending GOAWAY with an error code (non-graceful shutdown), the +// connection will close after goAwayTimeout. +// +// If we close the connection immediately after sending GOAWAY, there may +// be unsent data in our kernel receive buffer, which will cause the kernel +// to send a TCP RST on close() instead of a FIN. This RST will abort the +// connection immediately, whether or not the client had received the GOAWAY. +// +// Ideally we should delay for at least 1 RTT + epsilon so the client has +// a chance to read the GOAWAY and stop sending messages. Measuring RTT +// is hard, so we approximate with 1 second. See golang.org/issue/18701. +// +// This is a var so it can be shorter in tests, where all requests uses the +// loopback interface making the expected RTT very small. +// +// TODO: configurable? +var goAwayTimeout = 1 * time.Second + +func (sc *serverConn) startGracefulShutdownInternal() { + sc.goAway(ErrCodeNo) +} + +func (sc *serverConn) goAway(code ErrCode) { + sc.serveG.check() + if sc.inGoAway { + if sc.goAwayCode == ErrCodeNo { + sc.goAwayCode = code + } + return + } + sc.inGoAway = true + sc.needToSendGoAway = true + sc.goAwayCode = code + sc.scheduleFrameWrite() +} + +func (sc *serverConn) shutDownIn(d time.Duration) { + sc.serveG.check() + sc.shutdownTimer = time.AfterFunc(d, sc.onShutdownTimer) +} + +func (sc *serverConn) resetStream(se StreamError) { + sc.serveG.check() + sc.writeFrame(FrameWriteRequest{write: se}) + if st, ok := sc.streams[se.StreamID]; ok { + st.resetQueued = true + } +} + +// processFrameFromReader processes the serve loop's read from readFrameCh from the +// frame-reading goroutine. +// processFrameFromReader returns whether the connection should be kept open. +func (sc *serverConn) processFrameFromReader(res readFrameResult) bool { + sc.serveG.check() + err := res.err + if err != nil { + if err == ErrFrameTooLarge { + sc.goAway(ErrCodeFrameSize) + return true // goAway will close the loop + } + clientGone := err == io.EOF || err == io.ErrUnexpectedEOF || isClosedConnError(err) + if clientGone { + // TODO: could we also get into this state if + // the peer does a half close + // (e.g. CloseWrite) because they're done + // sending frames but they're still wanting + // our open replies? Investigate. + // TODO: add CloseWrite to crypto/tls.Conn first + // so we have a way to test this? I suppose + // just for testing we could have a non-TLS mode. + return false + } + } else { + f := res.f + if VerboseLogs { + sc.vlogf("http2: server read frame %v", summarizeFrame(f)) + } + err = sc.processFrame(f) + if err == nil { + return true + } + } + + switch ev := err.(type) { + case StreamError: + sc.resetStream(ev) + return true + case goAwayFlowError: + sc.goAway(ErrCodeFlowControl) + return true + case ConnectionError: + if res.f != nil { + if id := res.f.Header().StreamID; id > sc.maxClientStreamID { + sc.maxClientStreamID = id + } + } + sc.logf("http2: server connection error from %v: %v", sc.conn.RemoteAddr(), ev) + sc.goAway(ErrCode(ev)) + return true // goAway will handle shutdown + default: + if res.err != nil { + sc.vlogf("http2: server closing client connection; error reading frame from client %s: %v", sc.conn.RemoteAddr(), err) + } else { + sc.logf("http2: server closing client connection: %v", err) + } + return false + } +} + +func (sc *serverConn) processFrame(f Frame) error { + sc.serveG.check() + + // First frame received must be SETTINGS. + if !sc.sawFirstSettings { + if _, ok := f.(*SettingsFrame); !ok { + return sc.countError("first_settings", ConnectionError(ErrCodeProtocol)) + } + sc.sawFirstSettings = true + } + + // Discard frames for streams initiated after the identified last + // stream sent in a GOAWAY, or all frames after sending an error. + // We still need to return connection-level flow control for DATA frames. + // RFC 9113 Section 6.8. + if sc.inGoAway && (sc.goAwayCode != ErrCodeNo || f.Header().StreamID > sc.maxClientStreamID) { + + if f, ok := f.(*DataFrame); ok { + if !sc.inflow.take(f.Length) { + return sc.countError("data_flow", streamError(f.Header().StreamID, ErrCodeFlowControl)) + } + sc.sendWindowUpdate(nil, int(f.Length)) // conn-level + } + return nil + } + + switch f := f.(type) { + case *SettingsFrame: + return sc.processSettings(f) + case *MetaHeadersFrame: + return sc.processHeaders(f) + case *WindowUpdateFrame: + return sc.processWindowUpdate(f) + case *PingFrame: + return sc.processPing(f) + case *DataFrame: + return sc.processData(f) + case *RSTStreamFrame: + return sc.processResetStream(f) + case *PriorityFrame: + return sc.processPriority(f) + case *GoAwayFrame: + return sc.processGoAway(f) + case *PushPromiseFrame: + // A client cannot push. Thus, servers MUST treat the receipt of a PUSH_PROMISE + // frame as a connection error (Section 5.4.1) of type PROTOCOL_ERROR. + return sc.countError("push_promise", ConnectionError(ErrCodeProtocol)) + default: + sc.vlogf("http2: server ignoring frame: %v", f.Header()) + return nil + } +} + +func (sc *serverConn) processPing(f *PingFrame) error { + sc.serveG.check() + if f.IsAck() { + if sc.pingSent && sc.sentPingData == f.Data { + // This is a response to a PING we sent. + sc.pingSent = false + sc.readIdleTimer.Reset(sc.readIdleTimeout) + } + // 6.7 PING: " An endpoint MUST NOT respond to PING frames + // containing this flag." + return nil + } + if f.StreamID != 0 { + // "PING frames are not associated with any individual + // stream. If a PING frame is received with a stream + // identifier field value other than 0x0, the recipient MUST + // respond with a connection error (Section 5.4.1) of type + // PROTOCOL_ERROR." + return sc.countError("ping_on_stream", ConnectionError(ErrCodeProtocol)) + } + sc.writeFrame(FrameWriteRequest{write: writePingAck{f}}) + return nil +} + +func (sc *serverConn) processWindowUpdate(f *WindowUpdateFrame) error { + sc.serveG.check() + switch { + case f.StreamID != 0: // stream-level flow control + state, st := sc.state(f.StreamID) + if state == stateIdle { + // Section 5.1: "Receiving any frame other than HEADERS + // or PRIORITY on a stream in this state MUST be + // treated as a connection error (Section 5.4.1) of + // type PROTOCOL_ERROR." + return sc.countError("stream_idle", ConnectionError(ErrCodeProtocol)) + } + if st == nil { + // "WINDOW_UPDATE can be sent by a peer that has sent a + // frame bearing the END_STREAM flag. This means that a + // receiver could receive a WINDOW_UPDATE frame on a "half + // closed (remote)" or "closed" stream. A receiver MUST + // NOT treat this as an error, see Section 5.1." + return nil + } + if !st.flow.add(int32(f.Increment)) { + return sc.countError("bad_flow", streamError(f.StreamID, ErrCodeFlowControl)) + } + default: // connection-level flow control + if !sc.flow.add(int32(f.Increment)) { + return goAwayFlowError{} + } + } + sc.scheduleFrameWrite() + return nil +} + +func (sc *serverConn) processResetStream(f *RSTStreamFrame) error { + sc.serveG.check() + + state, st := sc.state(f.StreamID) + if state == stateIdle { + // 6.4 "RST_STREAM frames MUST NOT be sent for a + // stream in the "idle" state. If a RST_STREAM frame + // identifying an idle stream is received, the + // recipient MUST treat this as a connection error + // (Section 5.4.1) of type PROTOCOL_ERROR. + return sc.countError("reset_idle_stream", ConnectionError(ErrCodeProtocol)) + } + if st != nil { + st.cancelCtx() + sc.closeStream(st, streamError(f.StreamID, f.ErrCode)) + } + return nil +} + +func (sc *serverConn) closeStream(st *stream, err error) { + sc.serveG.check() + if st.state == stateIdle || st.state == stateClosed { + panic(fmt.Sprintf("invariant; can't close stream in state %v", st.state)) + } + st.state = stateClosed + if st.readDeadline != nil { + st.readDeadline.Stop() + } + if st.writeDeadline != nil { + st.writeDeadline.Stop() + } + if st.isPushed() { + sc.curPushedStreams-- + } else { + sc.curClientStreams-- + } + delete(sc.streams, st.id) + if len(sc.streams) == 0 { + sc.setConnState(http.StateIdle) + if sc.srv.IdleTimeout > 0 && sc.idleTimer != nil { + sc.idleTimer.Reset(sc.srv.IdleTimeout) + } + if h1ServerKeepAlivesDisabled(sc.hs) { + sc.startGracefulShutdownInternal() + } + } + if p := st.body; p != nil { + // Return any buffered unread bytes worth of conn-level flow control. + // See golang.org/issue/16481 + sc.sendWindowUpdate(nil, p.Len()) + + p.CloseWithError(err) + } + if e, ok := err.(StreamError); ok { + if e.Cause != nil { + err = e.Cause + } else { + err = errStreamClosed + } + } + st.closeErr = err + st.cancelCtx() + st.cw.Close() // signals Handler's CloseNotifier, unblocks writes, etc + sc.writeSched.CloseStream(st.id) +} + +func (sc *serverConn) processSettings(f *SettingsFrame) error { + sc.serveG.check() + if f.IsAck() { + sc.unackedSettings-- + if sc.unackedSettings < 0 { + // Why is the peer ACKing settings we never sent? + // The spec doesn't mention this case, but + // hang up on them anyway. + return sc.countError("ack_mystery", ConnectionError(ErrCodeProtocol)) + } + return nil + } + if f.NumSettings() > 100 || f.HasDuplicates() { + // This isn't actually in the spec, but hang up on + // suspiciously large settings frames or those with + // duplicate entries. + return sc.countError("settings_big_or_dups", ConnectionError(ErrCodeProtocol)) + } + if err := f.ForeachSetting(sc.processSetting); err != nil { + return err + } + // TODO: judging by RFC 7540, Section 6.5.3 each SETTINGS frame should be + // acknowledged individually, even if multiple are received before the ACK. + sc.needToSendSettingsAck = true + sc.scheduleFrameWrite() + return nil +} + +func (sc *serverConn) processSetting(s Setting) error { + sc.serveG.check() + if err := s.Valid(); err != nil { + return err + } + if VerboseLogs { + sc.vlogf("http2: server processing setting %v", s) + } + switch s.ID { + case SettingHeaderTableSize: + sc.hpackEncoder.SetMaxDynamicTableSize(s.Val) + case SettingEnablePush: + sc.pushEnabled = s.Val != 0 + case SettingMaxConcurrentStreams: + sc.clientMaxStreams = s.Val + case SettingInitialWindowSize: + return sc.processSettingInitialWindowSize(s.Val) + case SettingMaxFrameSize: + sc.maxFrameSize = int32(s.Val) // the maximum valid s.Val is < 2^31 + case SettingMaxHeaderListSize: + sc.peerMaxHeaderListSize = s.Val + case SettingEnableConnectProtocol: + // Receipt of this parameter by a server does not + // have any impact + default: + // Unknown setting: "An endpoint that receives a SETTINGS + // frame with any unknown or unsupported identifier MUST + // ignore that setting." + if VerboseLogs { + sc.vlogf("http2: server ignoring unknown setting %v", s) + } + } + return nil +} + +func (sc *serverConn) processSettingInitialWindowSize(val uint32) error { + sc.serveG.check() + // Note: val already validated to be within range by + // processSetting's Valid call. + + // "A SETTINGS frame can alter the initial flow control window + // size for all current streams. When the value of + // SETTINGS_INITIAL_WINDOW_SIZE changes, a receiver MUST + // adjust the size of all stream flow control windows that it + // maintains by the difference between the new value and the + // old value." + old := sc.initialStreamSendWindowSize + sc.initialStreamSendWindowSize = int32(val) + growth := int32(val) - old // may be negative + for _, st := range sc.streams { + if !st.flow.add(growth) { + // 6.9.2 Initial Flow Control Window Size + // "An endpoint MUST treat a change to + // SETTINGS_INITIAL_WINDOW_SIZE that causes any flow + // control window to exceed the maximum size as a + // connection error (Section 5.4.1) of type + // FLOW_CONTROL_ERROR." + return sc.countError("setting_win_size", ConnectionError(ErrCodeFlowControl)) + } + } + return nil +} + +func (sc *serverConn) processData(f *DataFrame) error { + sc.serveG.check() + id := f.Header().StreamID + + data := f.Data() + state, st := sc.state(id) + if id == 0 || state == stateIdle { + // Section 6.1: "DATA frames MUST be associated with a + // stream. If a DATA frame is received whose stream + // identifier field is 0x0, the recipient MUST respond + // with a connection error (Section 5.4.1) of type + // PROTOCOL_ERROR." + // + // Section 5.1: "Receiving any frame other than HEADERS + // or PRIORITY on a stream in this state MUST be + // treated as a connection error (Section 5.4.1) of + // type PROTOCOL_ERROR." + return sc.countError("data_on_idle", ConnectionError(ErrCodeProtocol)) + } + + // "If a DATA frame is received whose stream is not in "open" + // or "half closed (local)" state, the recipient MUST respond + // with a stream error (Section 5.4.2) of type STREAM_CLOSED." + if st == nil || state != stateOpen || st.gotTrailerHeader || st.resetQueued { + // This includes sending a RST_STREAM if the stream is + // in stateHalfClosedLocal (which currently means that + // the http.Handler returned, so it's done reading & + // done writing). Try to stop the client from sending + // more DATA. + + // But still enforce their connection-level flow control, + // and return any flow control bytes since we're not going + // to consume them. + if !sc.inflow.take(f.Length) { + return sc.countError("data_flow", streamError(id, ErrCodeFlowControl)) + } + sc.sendWindowUpdate(nil, int(f.Length)) // conn-level + + if st != nil && st.resetQueued { + // Already have a stream error in flight. Don't send another. + return nil + } + return sc.countError("closed", streamError(id, ErrCodeStreamClosed)) + } + if st.body == nil { + panic("internal error: should have a body in this state") + } + + // Sender sending more than they'd declared? + if st.declBodyBytes != -1 && st.bodyBytes+int64(len(data)) > st.declBodyBytes { + if !sc.inflow.take(f.Length) { + return sc.countError("data_flow", streamError(id, ErrCodeFlowControl)) + } + sc.sendWindowUpdate(nil, int(f.Length)) // conn-level + + st.body.CloseWithError(fmt.Errorf("sender tried to send more than declared Content-Length of %d bytes", st.declBodyBytes)) + // RFC 7540, sec 8.1.2.6: A request or response is also malformed if the + // value of a content-length header field does not equal the sum of the + // DATA frame payload lengths that form the body. + return sc.countError("send_too_much", streamError(id, ErrCodeProtocol)) + } + if f.Length > 0 { + // Check whether the client has flow control quota. + if !takeInflows(&sc.inflow, &st.inflow, f.Length) { + return sc.countError("flow_on_data_length", streamError(id, ErrCodeFlowControl)) + } + + if len(data) > 0 { + st.bodyBytes += int64(len(data)) + wrote, err := st.body.Write(data) + if err != nil { + // The handler has closed the request body. + // Return the connection-level flow control for the discarded data, + // but not the stream-level flow control. + sc.sendWindowUpdate(nil, int(f.Length)-wrote) + return nil + } + if wrote != len(data) { + panic("internal error: bad Writer") + } + } + + // Return any padded flow control now, since we won't + // refund it later on body reads. + // Call sendWindowUpdate even if there is no padding, + // to return buffered flow control credit if the sent + // window has shrunk. + pad := int32(f.Length) - int32(len(data)) + sc.sendWindowUpdate32(nil, pad) + sc.sendWindowUpdate32(st, pad) + } + if f.StreamEnded() { + st.endStream() + } + return nil +} + +func (sc *serverConn) processGoAway(f *GoAwayFrame) error { + sc.serveG.check() + if f.ErrCode != ErrCodeNo { + sc.logf("http2: received GOAWAY %+v, starting graceful shutdown", f) + } else { + sc.vlogf("http2: received GOAWAY %+v, starting graceful shutdown", f) + } + sc.startGracefulShutdownInternal() + // http://tools.ietf.org/html/rfc7540#section-6.8 + // We should not create any new streams, which means we should disable push. + sc.pushEnabled = false + return nil +} + +// isPushed reports whether the stream is server-initiated. +func (st *stream) isPushed() bool { + return st.id%2 == 0 +} + +// endStream closes a Request.Body's pipe. It is called when a DATA +// frame says a request body is over (or after trailers). +func (st *stream) endStream() { + sc := st.sc + sc.serveG.check() + + if st.declBodyBytes != -1 && st.declBodyBytes != st.bodyBytes { + st.body.CloseWithError(fmt.Errorf("request declared a Content-Length of %d but only wrote %d bytes", + st.declBodyBytes, st.bodyBytes)) + } else { + st.body.closeWithErrorAndCode(io.EOF, st.copyTrailersToHandlerRequest) + st.body.CloseWithError(io.EOF) + } + st.state = stateHalfClosedRemote +} + +// copyTrailersToHandlerRequest is run in the Handler's goroutine in +// its Request.Body.Read just before it gets io.EOF. +func (st *stream) copyTrailersToHandlerRequest() { + for k, vv := range st.trailer { + if _, ok := st.reqTrailer[k]; ok { + // Only copy it over it was pre-declared. + st.reqTrailer[k] = vv + } + } +} + +// onReadTimeout is run on its own goroutine (from time.AfterFunc) +// when the stream's ReadTimeout has fired. +func (st *stream) onReadTimeout() { + if st.body != nil { + // Wrap the ErrDeadlineExceeded to avoid callers depending on us + // returning the bare error. + st.body.CloseWithError(fmt.Errorf("%w", os.ErrDeadlineExceeded)) + } +} + +// onWriteTimeout is run on its own goroutine (from time.AfterFunc) +// when the stream's WriteTimeout has fired. +func (st *stream) onWriteTimeout() { + st.sc.writeFrameFromHandler(FrameWriteRequest{write: StreamError{ + StreamID: st.id, + Code: ErrCodeInternal, + Cause: os.ErrDeadlineExceeded, + }}) +} + +func (sc *serverConn) processHeaders(f *MetaHeadersFrame) error { + sc.serveG.check() + id := f.StreamID + // http://tools.ietf.org/html/rfc7540#section-5.1.1 + // Streams initiated by a client MUST use odd-numbered stream + // identifiers. [...] An endpoint that receives an unexpected + // stream identifier MUST respond with a connection error + // (Section 5.4.1) of type PROTOCOL_ERROR. + if id%2 != 1 { + return sc.countError("headers_even", ConnectionError(ErrCodeProtocol)) + } + // A HEADERS frame can be used to create a new stream or + // send a trailer for an open one. If we already have a stream + // open, let it process its own HEADERS frame (trailers at this + // point, if it's valid). + if st := sc.streams[f.StreamID]; st != nil { + if st.resetQueued { + // We're sending RST_STREAM to close the stream, so don't bother + // processing this frame. + return nil + } + // RFC 7540, sec 5.1: If an endpoint receives additional frames, other than + // WINDOW_UPDATE, PRIORITY, or RST_STREAM, for a stream that is in + // this state, it MUST respond with a stream error (Section 5.4.2) of + // type STREAM_CLOSED. + if st.state == stateHalfClosedRemote { + return sc.countError("headers_half_closed", streamError(id, ErrCodeStreamClosed)) + } + return st.processTrailerHeaders(f) + } + + // [...] The identifier of a newly established stream MUST be + // numerically greater than all streams that the initiating + // endpoint has opened or reserved. [...] An endpoint that + // receives an unexpected stream identifier MUST respond with + // a connection error (Section 5.4.1) of type PROTOCOL_ERROR. + if id <= sc.maxClientStreamID { + return sc.countError("stream_went_down", ConnectionError(ErrCodeProtocol)) + } + sc.maxClientStreamID = id + + if sc.idleTimer != nil { + sc.idleTimer.Stop() + } + + // http://tools.ietf.org/html/rfc7540#section-5.1.2 + // [...] Endpoints MUST NOT exceed the limit set by their peer. An + // endpoint that receives a HEADERS frame that causes their + // advertised concurrent stream limit to be exceeded MUST treat + // this as a stream error (Section 5.4.2) of type PROTOCOL_ERROR + // or REFUSED_STREAM. + if sc.curClientStreams+1 > sc.advMaxStreams { + if sc.unackedSettings == 0 { + // They should know better. + return sc.countError("over_max_streams", streamError(id, ErrCodeProtocol)) + } + // Assume it's a network race, where they just haven't + // received our last SETTINGS update. But actually + // this can't happen yet, because we don't yet provide + // a way for users to adjust server parameters at + // runtime. + return sc.countError("over_max_streams_race", streamError(id, ErrCodeRefusedStream)) + } + + initialState := stateOpen + if f.StreamEnded() { + initialState = stateHalfClosedRemote + } + st := sc.newStream(id, 0, initialState) + + if f.HasPriority() { + if err := sc.checkPriority(f.StreamID, f.Priority); err != nil { + return err + } + sc.writeSched.AdjustStream(st.id, f.Priority) + } + + rw, req, err := sc.newWriterAndRequest(st, f) + if err != nil { + return err + } + st.reqTrailer = req.Trailer + if st.reqTrailer != nil { + st.trailer = make(http.Header) + } + st.body = req.Body.(*requestBody).pipe // may be nil + st.declBodyBytes = req.ContentLength + + handler := sc.handler.ServeHTTP + if f.Truncated { + // Their header list was too long. Send a 431 error. + handler = handleHeaderListTooLong + } else if err := checkValidHTTP2RequestHeaders(req.Header); err != nil { + handler = new400Handler(err) + } + + // The net/http package sets the read deadline from the + // http.Server.ReadTimeout during the TLS handshake, but then + // passes the connection off to us with the deadline already + // set. Disarm it here after the request headers are read, + // similar to how the http1 server works. Here it's + // technically more like the http1 Server's ReadHeaderTimeout + // (in Go 1.8), though. That's a more sane option anyway. + if sc.hs.ReadTimeout > 0 { + sc.conn.SetReadDeadline(time.Time{}) + st.readDeadline = time.AfterFunc(sc.hs.ReadTimeout, st.onReadTimeout) + } + + return sc.scheduleHandler(id, rw, req, handler) +} + +func (sc *serverConn) upgradeRequest(req *http.Request) { + sc.serveG.check() + id := uint32(1) + sc.maxClientStreamID = id + st := sc.newStream(id, 0, stateHalfClosedRemote) + st.reqTrailer = req.Trailer + if st.reqTrailer != nil { + st.trailer = make(http.Header) + } + rw := sc.newResponseWriter(st, req) + + // Disable any read deadline set by the net/http package + // prior to the upgrade. + if sc.hs.ReadTimeout > 0 { + sc.conn.SetReadDeadline(time.Time{}) + } + + // This is the first request on the connection, + // so start the handler directly rather than going + // through scheduleHandler. + sc.curHandlers++ + go sc.runHandler(rw, req, sc.handler.ServeHTTP) +} + +func (st *stream) processTrailerHeaders(f *MetaHeadersFrame) error { + sc := st.sc + sc.serveG.check() + if st.gotTrailerHeader { + return sc.countError("dup_trailers", ConnectionError(ErrCodeProtocol)) + } + st.gotTrailerHeader = true + if !f.StreamEnded() { + return sc.countError("trailers_not_ended", streamError(st.id, ErrCodeProtocol)) + } + + if len(f.PseudoFields()) > 0 { + return sc.countError("trailers_pseudo", streamError(st.id, ErrCodeProtocol)) + } + if st.trailer != nil { + for _, hf := range f.RegularFields() { + key := sc.canonicalHeader(hf.Name) + if !httpguts.ValidTrailerHeader(key) { + // TODO: send more details to the peer somehow. But http2 has + // no way to send debug data at a stream level. Discuss with + // HTTP folk. + return sc.countError("trailers_bogus", streamError(st.id, ErrCodeProtocol)) + } + st.trailer[key] = append(st.trailer[key], hf.Value) + } + } + st.endStream() + return nil +} + +func (sc *serverConn) checkPriority(streamID uint32, p PriorityParam) error { + if streamID == p.StreamDep { + // Section 5.3.1: "A stream cannot depend on itself. An endpoint MUST treat + // this as a stream error (Section 5.4.2) of type PROTOCOL_ERROR." + // Section 5.3.3 says that a stream can depend on one of its dependencies, + // so it's only self-dependencies that are forbidden. + return sc.countError("priority", streamError(streamID, ErrCodeProtocol)) + } + return nil +} + +func (sc *serverConn) processPriority(f *PriorityFrame) error { + if err := sc.checkPriority(f.StreamID, f.PriorityParam); err != nil { + return err + } + sc.writeSched.AdjustStream(f.StreamID, f.PriorityParam) + return nil +} + +func (sc *serverConn) newStream(id, pusherID uint32, state streamState) *stream { + sc.serveG.check() + if id == 0 { + panic("internal error: cannot create stream with id 0") + } + + ctx, cancelCtx := context.WithCancel(sc.baseCtx) + st := &stream{ + sc: sc, + id: id, + state: state, + ctx: ctx, + cancelCtx: cancelCtx, + } + st.cw.Init() + st.flow.conn = &sc.flow // link to conn-level counter + st.flow.add(sc.initialStreamSendWindowSize) + st.inflow.init(sc.initialStreamRecvWindowSize) + if sc.hs.WriteTimeout > 0 { + st.writeDeadline = time.AfterFunc(sc.hs.WriteTimeout, st.onWriteTimeout) + } + + sc.streams[id] = st + sc.writeSched.OpenStream(st.id, OpenStreamOptions{PusherID: pusherID}) + if st.isPushed() { + sc.curPushedStreams++ + } else { + sc.curClientStreams++ + } + if sc.curOpenStreams() == 1 { + sc.setConnState(http.StateActive) + } + + return st +} + +func (sc *serverConn) newWriterAndRequest(st *stream, f *MetaHeadersFrame) (*responseWriter, *http.Request, error) { + sc.serveG.check() + + rp := httpcommon.ServerRequestParam{ + Method: f.PseudoValue("method"), + Scheme: f.PseudoValue("scheme"), + Authority: f.PseudoValue("authority"), + Path: f.PseudoValue("path"), + Protocol: f.PseudoValue("protocol"), + } + + // extended connect is disabled, so we should not see :protocol + if disableExtendedConnectProtocol && rp.Protocol != "" { + return nil, nil, sc.countError("bad_connect", streamError(f.StreamID, ErrCodeProtocol)) + } + + isConnect := rp.Method == "CONNECT" + if isConnect { + if rp.Protocol == "" && (rp.Path != "" || rp.Scheme != "" || rp.Authority == "") { + return nil, nil, sc.countError("bad_connect", streamError(f.StreamID, ErrCodeProtocol)) + } + } else if rp.Method == "" || rp.Path == "" || (rp.Scheme != "https" && rp.Scheme != "http") { + // See 8.1.2.6 Malformed Requests and Responses: + // + // Malformed requests or responses that are detected + // MUST be treated as a stream error (Section 5.4.2) + // of type PROTOCOL_ERROR." + // + // 8.1.2.3 Request Pseudo-Header Fields + // "All HTTP/2 requests MUST include exactly one valid + // value for the :method, :scheme, and :path + // pseudo-header fields" + return nil, nil, sc.countError("bad_path_method", streamError(f.StreamID, ErrCodeProtocol)) + } + + header := make(http.Header) + rp.Header = header + for _, hf := range f.RegularFields() { + header.Add(sc.canonicalHeader(hf.Name), hf.Value) + } + if rp.Authority == "" { + rp.Authority = header.Get("Host") + } + if rp.Protocol != "" { + header.Set(":protocol", rp.Protocol) + } + + rw, req, err := sc.newWriterAndRequestNoBody(st, rp) + if err != nil { + return nil, nil, err + } + bodyOpen := !f.StreamEnded() + if bodyOpen { + if vv, ok := rp.Header["Content-Length"]; ok { + if cl, err := strconv.ParseUint(vv[0], 10, 63); err == nil { + req.ContentLength = int64(cl) + } else { + req.ContentLength = 0 + } + } else { + req.ContentLength = -1 + } + req.Body.(*requestBody).pipe = &pipe{ + b: &dataBuffer{expected: req.ContentLength}, + } + } + return rw, req, nil +} + +func (sc *serverConn) newWriterAndRequestNoBody(st *stream, rp httpcommon.ServerRequestParam) (*responseWriter, *http.Request, error) { + sc.serveG.check() + + var tlsState *tls.ConnectionState // nil if not scheme https + if rp.Scheme == "https" { + tlsState = sc.tlsState + } + + res := httpcommon.NewServerRequest(rp) + if res.InvalidReason != "" { + return nil, nil, sc.countError(res.InvalidReason, streamError(st.id, ErrCodeProtocol)) + } + + body := &requestBody{ + conn: sc, + stream: st, + needsContinue: res.NeedsContinue, + } + req := (&http.Request{ + Method: rp.Method, + URL: res.URL, + RemoteAddr: sc.remoteAddrStr, + Header: rp.Header, + RequestURI: res.RequestURI, + Proto: "HTTP/2.0", + ProtoMajor: 2, + ProtoMinor: 0, + TLS: tlsState, + Host: rp.Authority, + Body: body, + Trailer: res.Trailer, + }).WithContext(st.ctx) + rw := sc.newResponseWriter(st, req) + return rw, req, nil +} + +func (sc *serverConn) newResponseWriter(st *stream, req *http.Request) *responseWriter { + rws := responseWriterStatePool.Get().(*responseWriterState) + bwSave := rws.bw + *rws = responseWriterState{} // zero all the fields + rws.conn = sc + rws.bw = bwSave + rws.bw.Reset(chunkWriter{rws}) + rws.stream = st + rws.req = req + return &responseWriter{rws: rws} +} + +type unstartedHandler struct { + streamID uint32 + rw *responseWriter + req *http.Request + handler func(http.ResponseWriter, *http.Request) +} + +// scheduleHandler starts a handler goroutine, +// or schedules one to start as soon as an existing handler finishes. +func (sc *serverConn) scheduleHandler(streamID uint32, rw *responseWriter, req *http.Request, handler func(http.ResponseWriter, *http.Request)) error { + sc.serveG.check() + maxHandlers := sc.advMaxStreams + if sc.curHandlers < maxHandlers { + sc.curHandlers++ + go sc.runHandler(rw, req, handler) + return nil + } + if len(sc.unstartedHandlers) > int(4*sc.advMaxStreams) { + return sc.countError("too_many_early_resets", ConnectionError(ErrCodeEnhanceYourCalm)) + } + sc.unstartedHandlers = append(sc.unstartedHandlers, unstartedHandler{ + streamID: streamID, + rw: rw, + req: req, + handler: handler, + }) + return nil +} + +func (sc *serverConn) handlerDone() { + sc.serveG.check() + sc.curHandlers-- + i := 0 + maxHandlers := sc.advMaxStreams + for ; i < len(sc.unstartedHandlers); i++ { + u := sc.unstartedHandlers[i] + if sc.streams[u.streamID] == nil { + // This stream was reset before its goroutine had a chance to start. + continue + } + if sc.curHandlers >= maxHandlers { + break + } + sc.curHandlers++ + go sc.runHandler(u.rw, u.req, u.handler) + sc.unstartedHandlers[i] = unstartedHandler{} // don't retain references + } + sc.unstartedHandlers = sc.unstartedHandlers[i:] + if len(sc.unstartedHandlers) == 0 { + sc.unstartedHandlers = nil + } +} + +// Run on its own goroutine. +func (sc *serverConn) runHandler(rw *responseWriter, req *http.Request, handler func(http.ResponseWriter, *http.Request)) { + defer sc.sendServeMsg(handlerDoneMsg) + didPanic := true + defer func() { + rw.rws.stream.cancelCtx() + if req.MultipartForm != nil { + req.MultipartForm.RemoveAll() + } + if didPanic { + e := recover() + sc.writeFrameFromHandler(FrameWriteRequest{ + write: handlerPanicRST{rw.rws.stream.id}, + stream: rw.rws.stream, + }) + // Same as net/http: + if e != nil && e != http.ErrAbortHandler { + const size = 64 << 10 + buf := make([]byte, size) + buf = buf[:runtime.Stack(buf, false)] + sc.logf("http2: panic serving %v: %v\n%s", sc.conn.RemoteAddr(), e, buf) + } + return + } + rw.handlerDone() + }() + handler(rw, req) + didPanic = false +} + +func handleHeaderListTooLong(w http.ResponseWriter, r *http.Request) { + // 10.5.1 Limits on Header Block Size: + // .. "A server that receives a larger header block than it is + // willing to handle can send an HTTP 431 (Request Header Fields Too + // Large) status code" + const statusRequestHeaderFieldsTooLarge = 431 // only in Go 1.6+ + w.WriteHeader(statusRequestHeaderFieldsTooLarge) + io.WriteString(w, "

HTTP Error 431

Request Header Field(s) Too Large

") +} + +// called from handler goroutines. +// h may be nil. +func (sc *serverConn) writeHeaders(st *stream, headerData *writeResHeaders) error { + sc.serveG.checkNotOn() // NOT on + var errc chan error + if headerData.h != nil { + // If there's a header map (which we don't own), so we have to block on + // waiting for this frame to be written, so an http.Flush mid-handler + // writes out the correct value of keys, before a handler later potentially + // mutates it. + errc = sc.srv.state.getErrChan() + } + if err := sc.writeFrameFromHandler(FrameWriteRequest{ + write: headerData, + stream: st, + done: errc, + }); err != nil { + return err + } + if errc != nil { + select { + case err := <-errc: + sc.srv.state.putErrChan(errc) + return err + case <-sc.doneServing: + return errClientDisconnected + case <-st.cw: + return errStreamClosed + } + } + return nil +} + +// called from handler goroutines. +func (sc *serverConn) write100ContinueHeaders(st *stream) { + sc.writeFrameFromHandler(FrameWriteRequest{ + write: write100ContinueHeadersFrame{st.id}, + stream: st, + }) +} + +// A bodyReadMsg tells the server loop that the http.Handler read n +// bytes of the DATA from the client on the given stream. +type bodyReadMsg struct { + st *stream + n int +} + +// called from handler goroutines. +// Notes that the handler for the given stream ID read n bytes of its body +// and schedules flow control tokens to be sent. +func (sc *serverConn) noteBodyReadFromHandler(st *stream, n int, err error) { + sc.serveG.checkNotOn() // NOT on + if n > 0 { + select { + case sc.bodyReadCh <- bodyReadMsg{st, n}: + case <-sc.doneServing: + } + } +} + +func (sc *serverConn) noteBodyRead(st *stream, n int) { + sc.serveG.check() + sc.sendWindowUpdate(nil, n) // conn-level + if st.state != stateHalfClosedRemote && st.state != stateClosed { + // Don't send this WINDOW_UPDATE if the stream is closed + // remotely. + sc.sendWindowUpdate(st, n) + } +} + +// st may be nil for conn-level +func (sc *serverConn) sendWindowUpdate32(st *stream, n int32) { + sc.sendWindowUpdate(st, int(n)) +} + +// st may be nil for conn-level +func (sc *serverConn) sendWindowUpdate(st *stream, n int) { + sc.serveG.check() + var streamID uint32 + var send int32 + if st == nil { + send = sc.inflow.add(n) + } else { + streamID = st.id + send = st.inflow.add(n) + } + if send == 0 { + return + } + sc.writeFrame(FrameWriteRequest{ + write: writeWindowUpdate{streamID: streamID, n: uint32(send)}, + stream: st, + }) +} + +// requestBody is the Handler's Request.Body type. +// Read and Close may be called concurrently. +type requestBody struct { + _ incomparable + stream *stream + conn *serverConn + closeOnce sync.Once // for use by Close only + sawEOF bool // for use by Read only + pipe *pipe // non-nil if we have an HTTP entity message body + needsContinue bool // need to send a 100-continue +} + +func (b *requestBody) Close() error { + b.closeOnce.Do(func() { + if b.pipe != nil { + b.pipe.BreakWithError(errClosedBody) + } + }) + return nil +} + +func (b *requestBody) Read(p []byte) (n int, err error) { + if b.needsContinue { + b.needsContinue = false + b.conn.write100ContinueHeaders(b.stream) + } + if b.pipe == nil || b.sawEOF { + return 0, io.EOF + } + n, err = b.pipe.Read(p) + if err == io.EOF { + b.sawEOF = true + } + if b.conn == nil { + return + } + b.conn.noteBodyReadFromHandler(b.stream, n, err) + return +} + +// responseWriter is the http.ResponseWriter implementation. It's +// intentionally small (1 pointer wide) to minimize garbage. The +// responseWriterState pointer inside is zeroed at the end of a +// request (in handlerDone) and calls on the responseWriter thereafter +// simply crash (caller's mistake), but the much larger responseWriterState +// and buffers are reused between multiple requests. +type responseWriter struct { + rws *responseWriterState +} + +// Optional http.ResponseWriter interfaces implemented. +var ( + _ http.CloseNotifier = (*responseWriter)(nil) + _ http.Flusher = (*responseWriter)(nil) + _ stringWriter = (*responseWriter)(nil) +) + +type responseWriterState struct { + // immutable within a request: + stream *stream + req *http.Request + conn *serverConn + + // TODO: adjust buffer writing sizes based on server config, frame size updates from peer, etc + bw *bufio.Writer // writing to a chunkWriter{this *responseWriterState} + + // mutated by http.Handler goroutine: + handlerHeader http.Header // nil until called + snapHeader http.Header // snapshot of handlerHeader at WriteHeader time + trailers []string // set in writeChunk + status int // status code passed to WriteHeader + wroteHeader bool // WriteHeader called (explicitly or implicitly). Not necessarily sent to user yet. + sentHeader bool // have we sent the header frame? + handlerDone bool // handler has finished + + sentContentLen int64 // non-zero if handler set a Content-Length header + wroteBytes int64 + + closeNotifierMu sync.Mutex // guards closeNotifierCh + closeNotifierCh chan bool // nil until first used +} + +type chunkWriter struct{ rws *responseWriterState } + +func (cw chunkWriter) Write(p []byte) (n int, err error) { + n, err = cw.rws.writeChunk(p) + if err == errStreamClosed { + // If writing failed because the stream has been closed, + // return the reason it was closed. + err = cw.rws.stream.closeErr + } + return n, err +} + +func (rws *responseWriterState) hasTrailers() bool { return len(rws.trailers) > 0 } + +func (rws *responseWriterState) hasNonemptyTrailers() bool { + for _, trailer := range rws.trailers { + if _, ok := rws.handlerHeader[trailer]; ok { + return true + } + } + return false +} + +// declareTrailer is called for each Trailer header when the +// response header is written. It notes that a header will need to be +// written in the trailers at the end of the response. +func (rws *responseWriterState) declareTrailer(k string) { + k = http.CanonicalHeaderKey(k) + if !httpguts.ValidTrailerHeader(k) { + // Forbidden by RFC 7230, section 4.1.2. + rws.conn.logf("ignoring invalid trailer %q", k) + return + } + if !strSliceContains(rws.trailers, k) { + rws.trailers = append(rws.trailers, k) + } +} + +// writeChunk writes chunks from the bufio.Writer. But because +// bufio.Writer may bypass its chunking, sometimes p may be +// arbitrarily large. +// +// writeChunk is also responsible (on the first chunk) for sending the +// HEADER response. +func (rws *responseWriterState) writeChunk(p []byte) (n int, err error) { + if !rws.wroteHeader { + rws.writeHeader(200) + } + + if rws.handlerDone { + rws.promoteUndeclaredTrailers() + } + + isHeadResp := rws.req.Method == "HEAD" + if !rws.sentHeader { + rws.sentHeader = true + var ctype, clen string + if clen = rws.snapHeader.Get("Content-Length"); clen != "" { + rws.snapHeader.Del("Content-Length") + if cl, err := strconv.ParseUint(clen, 10, 63); err == nil { + rws.sentContentLen = int64(cl) + } else { + clen = "" + } + } + _, hasContentLength := rws.snapHeader["Content-Length"] + if !hasContentLength && clen == "" && rws.handlerDone && bodyAllowedForStatus(rws.status) && (len(p) > 0 || !isHeadResp) { + clen = strconv.Itoa(len(p)) + } + _, hasContentType := rws.snapHeader["Content-Type"] + // If the Content-Encoding is non-blank, we shouldn't + // sniff the body. See Issue golang.org/issue/31753. + ce := rws.snapHeader.Get("Content-Encoding") + hasCE := len(ce) > 0 + if !hasCE && !hasContentType && bodyAllowedForStatus(rws.status) && len(p) > 0 { + ctype = http.DetectContentType(p) + } + var date string + if _, ok := rws.snapHeader["Date"]; !ok { + // TODO(bradfitz): be faster here, like net/http? measure. + date = time.Now().UTC().Format(http.TimeFormat) + } + + for _, v := range rws.snapHeader["Trailer"] { + foreachHeaderElement(v, rws.declareTrailer) + } + + // "Connection" headers aren't allowed in HTTP/2 (RFC 7540, 8.1.2.2), + // but respect "Connection" == "close" to mean sending a GOAWAY and tearing + // down the TCP connection when idle, like we do for HTTP/1. + // TODO: remove more Connection-specific header fields here, in addition + // to "Connection". + if _, ok := rws.snapHeader["Connection"]; ok { + v := rws.snapHeader.Get("Connection") + delete(rws.snapHeader, "Connection") + if v == "close" { + rws.conn.startGracefulShutdown() + } + } + + endStream := (rws.handlerDone && !rws.hasTrailers() && len(p) == 0) || isHeadResp + err = rws.conn.writeHeaders(rws.stream, &writeResHeaders{ + streamID: rws.stream.id, + httpResCode: rws.status, + h: rws.snapHeader, + endStream: endStream, + contentType: ctype, + contentLength: clen, + date: date, + }) + if err != nil { + return 0, err + } + if endStream { + return 0, nil + } + } + if isHeadResp { + return len(p), nil + } + if len(p) == 0 && !rws.handlerDone { + return 0, nil + } + + // only send trailers if they have actually been defined by the + // server handler. + hasNonemptyTrailers := rws.hasNonemptyTrailers() + endStream := rws.handlerDone && !hasNonemptyTrailers + if len(p) > 0 || endStream { + // only send a 0 byte DATA frame if we're ending the stream. + if err := rws.conn.writeDataFromHandler(rws.stream, p, endStream); err != nil { + return 0, err + } + } + + if rws.handlerDone && hasNonemptyTrailers { + err = rws.conn.writeHeaders(rws.stream, &writeResHeaders{ + streamID: rws.stream.id, + h: rws.handlerHeader, + trailers: rws.trailers, + endStream: true, + }) + return len(p), err + } + return len(p), nil +} + +// TrailerPrefix is a magic prefix for ResponseWriter.Header map keys +// that, if present, signals that the map entry is actually for +// the response trailers, and not the response headers. The prefix +// is stripped after the ServeHTTP call finishes and the values are +// sent in the trailers. +// +// This mechanism is intended only for trailers that are not known +// prior to the headers being written. If the set of trailers is fixed +// or known before the header is written, the normal Go trailers mechanism +// is preferred: +// +// https://golang.org/pkg/net/http/#ResponseWriter +// https://golang.org/pkg/net/http/#example_ResponseWriter_trailers +const TrailerPrefix = "Trailer:" + +// promoteUndeclaredTrailers permits http.Handlers to set trailers +// after the header has already been flushed. Because the Go +// ResponseWriter interface has no way to set Trailers (only the +// Header), and because we didn't want to expand the ResponseWriter +// interface, and because nobody used trailers, and because RFC 7230 +// says you SHOULD (but not must) predeclare any trailers in the +// header, the official ResponseWriter rules said trailers in Go must +// be predeclared, and then we reuse the same ResponseWriter.Header() +// map to mean both Headers and Trailers. When it's time to write the +// Trailers, we pick out the fields of Headers that were declared as +// trailers. That worked for a while, until we found the first major +// user of Trailers in the wild: gRPC (using them only over http2), +// and gRPC libraries permit setting trailers mid-stream without +// predeclaring them. So: change of plans. We still permit the old +// way, but we also permit this hack: if a Header() key begins with +// "Trailer:", the suffix of that key is a Trailer. Because ':' is an +// invalid token byte anyway, there is no ambiguity. (And it's already +// filtered out) It's mildly hacky, but not terrible. +// +// This method runs after the Handler is done and promotes any Header +// fields to be trailers. +func (rws *responseWriterState) promoteUndeclaredTrailers() { + for k, vv := range rws.handlerHeader { + if !strings.HasPrefix(k, TrailerPrefix) { + continue + } + trailerKey := strings.TrimPrefix(k, TrailerPrefix) + rws.declareTrailer(trailerKey) + rws.handlerHeader[http.CanonicalHeaderKey(trailerKey)] = vv + } + + if len(rws.trailers) > 1 { + sorter := sorterPool.Get().(*sorter) + sorter.SortStrings(rws.trailers) + sorterPool.Put(sorter) + } +} + +func (w *responseWriter) SetReadDeadline(deadline time.Time) error { + st := w.rws.stream + if !deadline.IsZero() && deadline.Before(time.Now()) { + // If we're setting a deadline in the past, reset the stream immediately + // so writes after SetWriteDeadline returns will fail. + st.onReadTimeout() + return nil + } + w.rws.conn.sendServeMsg(func(sc *serverConn) { + if st.readDeadline != nil { + if !st.readDeadline.Stop() { + // Deadline already exceeded, or stream has been closed. + return + } + } + if deadline.IsZero() { + st.readDeadline = nil + } else if st.readDeadline == nil { + st.readDeadline = time.AfterFunc(deadline.Sub(time.Now()), st.onReadTimeout) + } else { + st.readDeadline.Reset(deadline.Sub(time.Now())) + } + }) + return nil +} + +func (w *responseWriter) SetWriteDeadline(deadline time.Time) error { + st := w.rws.stream + if !deadline.IsZero() && deadline.Before(time.Now()) { + // If we're setting a deadline in the past, reset the stream immediately + // so writes after SetWriteDeadline returns will fail. + st.onWriteTimeout() + return nil + } + w.rws.conn.sendServeMsg(func(sc *serverConn) { + if st.writeDeadline != nil { + if !st.writeDeadline.Stop() { + // Deadline already exceeded, or stream has been closed. + return + } + } + if deadline.IsZero() { + st.writeDeadline = nil + } else if st.writeDeadline == nil { + st.writeDeadline = time.AfterFunc(deadline.Sub(time.Now()), st.onWriteTimeout) + } else { + st.writeDeadline.Reset(deadline.Sub(time.Now())) + } + }) + return nil +} + +func (w *responseWriter) EnableFullDuplex() error { + // We always support full duplex responses, so this is a no-op. + return nil +} + +func (w *responseWriter) Flush() { + w.FlushError() +} + +func (w *responseWriter) FlushError() error { + rws := w.rws + if rws == nil { + panic("Header called after Handler finished") + } + var err error + if rws.bw.Buffered() > 0 { + err = rws.bw.Flush() + } else { + // The bufio.Writer won't call chunkWriter.Write + // (writeChunk with zero bytes), so we have to do it + // ourselves to force the HTTP response header and/or + // final DATA frame (with END_STREAM) to be sent. + _, err = chunkWriter{rws}.Write(nil) + if err == nil { + select { + case <-rws.stream.cw: + err = rws.stream.closeErr + default: + } + } + } + return err +} + +func (w *responseWriter) CloseNotify() <-chan bool { + rws := w.rws + if rws == nil { + panic("CloseNotify called after Handler finished") + } + rws.closeNotifierMu.Lock() + ch := rws.closeNotifierCh + if ch == nil { + ch = make(chan bool, 1) + rws.closeNotifierCh = ch + cw := rws.stream.cw + go func() { + cw.Wait() // wait for close + ch <- true + }() + } + rws.closeNotifierMu.Unlock() + return ch +} + +func (w *responseWriter) Header() http.Header { + rws := w.rws + if rws == nil { + panic("Header called after Handler finished") + } + if rws.handlerHeader == nil { + rws.handlerHeader = make(http.Header) + } + return rws.handlerHeader +} + +// checkWriteHeaderCode is a copy of net/http's checkWriteHeaderCode. +func checkWriteHeaderCode(code int) { + // Issue 22880: require valid WriteHeader status codes. + // For now we only enforce that it's three digits. + // In the future we might block things over 599 (600 and above aren't defined + // at http://httpwg.org/specs/rfc7231.html#status.codes). + // But for now any three digits. + // + // We used to send "HTTP/1.1 000 0" on the wire in responses but there's + // no equivalent bogus thing we can realistically send in HTTP/2, + // so we'll consistently panic instead and help people find their bugs + // early. (We can't return an error from WriteHeader even if we wanted to.) + if code < 100 || code > 999 { + panic(fmt.Sprintf("invalid WriteHeader code %v", code)) + } +} + +func (w *responseWriter) WriteHeader(code int) { + rws := w.rws + if rws == nil { + panic("WriteHeader called after Handler finished") + } + rws.writeHeader(code) +} + +func (rws *responseWriterState) writeHeader(code int) { + if rws.wroteHeader { + return + } + + checkWriteHeaderCode(code) + + // Handle informational headers + if code >= 100 && code <= 199 { + // Per RFC 8297 we must not clear the current header map + h := rws.handlerHeader + + _, cl := h["Content-Length"] + _, te := h["Transfer-Encoding"] + if cl || te { + h = h.Clone() + h.Del("Content-Length") + h.Del("Transfer-Encoding") + } + + rws.conn.writeHeaders(rws.stream, &writeResHeaders{ + streamID: rws.stream.id, + httpResCode: code, + h: h, + endStream: rws.handlerDone && !rws.hasTrailers(), + }) + + return + } + + rws.wroteHeader = true + rws.status = code + if len(rws.handlerHeader) > 0 { + rws.snapHeader = cloneHeader(rws.handlerHeader) + } +} + +func cloneHeader(h http.Header) http.Header { + h2 := make(http.Header, len(h)) + for k, vv := range h { + vv2 := make([]string, len(vv)) + copy(vv2, vv) + h2[k] = vv2 + } + return h2 +} + +// The Life Of A Write is like this: +// +// * Handler calls w.Write or w.WriteString -> +// * -> rws.bw (*bufio.Writer) -> +// * (Handler might call Flush) +// * -> chunkWriter{rws} +// * -> responseWriterState.writeChunk(p []byte) +// * -> responseWriterState.writeChunk (most of the magic; see comment there) +func (w *responseWriter) Write(p []byte) (n int, err error) { + return w.write(len(p), p, "") +} + +func (w *responseWriter) WriteString(s string) (n int, err error) { + return w.write(len(s), nil, s) +} + +// either dataB or dataS is non-zero. +func (w *responseWriter) write(lenData int, dataB []byte, dataS string) (n int, err error) { + rws := w.rws + if rws == nil { + panic("Write called after Handler finished") + } + if !rws.wroteHeader { + w.WriteHeader(200) + } + if !bodyAllowedForStatus(rws.status) { + return 0, http.ErrBodyNotAllowed + } + rws.wroteBytes += int64(len(dataB)) + int64(len(dataS)) // only one can be set + if rws.sentContentLen != 0 && rws.wroteBytes > rws.sentContentLen { + // TODO: send a RST_STREAM + return 0, errors.New("http2: handler wrote more than declared Content-Length") + } + + if dataB != nil { + return rws.bw.Write(dataB) + } else { + return rws.bw.WriteString(dataS) + } +} + +func (w *responseWriter) handlerDone() { + rws := w.rws + rws.handlerDone = true + w.Flush() + w.rws = nil + responseWriterStatePool.Put(rws) +} + +// Push errors. +var ( + ErrRecursivePush = errors.New("http2: recursive push not allowed") + ErrPushLimitReached = errors.New("http2: push would exceed peer's SETTINGS_MAX_CONCURRENT_STREAMS") +) + +var _ http.Pusher = (*responseWriter)(nil) + +func (w *responseWriter) Push(target string, opts *http.PushOptions) error { + st := w.rws.stream + sc := st.sc + sc.serveG.checkNotOn() + + // No recursive pushes: "PUSH_PROMISE frames MUST only be sent on a peer-initiated stream." + // http://tools.ietf.org/html/rfc7540#section-6.6 + if st.isPushed() { + return ErrRecursivePush + } + + if opts == nil { + opts = new(http.PushOptions) + } + + // Default options. + if opts.Method == "" { + opts.Method = "GET" + } + if opts.Header == nil { + opts.Header = http.Header{} + } + wantScheme := "http" + if w.rws.req.TLS != nil { + wantScheme = "https" + } + + // Validate the request. + u, err := url.Parse(target) + if err != nil { + return err + } + if u.Scheme == "" { + if !strings.HasPrefix(target, "/") { + return fmt.Errorf("target must be an absolute URL or an absolute path: %q", target) + } + u.Scheme = wantScheme + u.Host = w.rws.req.Host + } else { + if u.Scheme != wantScheme { + return fmt.Errorf("cannot push URL with scheme %q from request with scheme %q", u.Scheme, wantScheme) + } + if u.Host == "" { + return errors.New("URL must have a host") + } + } + for k := range opts.Header { + if strings.HasPrefix(k, ":") { + return fmt.Errorf("promised request headers cannot include pseudo header %q", k) + } + // These headers are meaningful only if the request has a body, + // but PUSH_PROMISE requests cannot have a body. + // http://tools.ietf.org/html/rfc7540#section-8.2 + // Also disallow Host, since the promised URL must be absolute. + if asciiEqualFold(k, "content-length") || + asciiEqualFold(k, "content-encoding") || + asciiEqualFold(k, "trailer") || + asciiEqualFold(k, "te") || + asciiEqualFold(k, "expect") || + asciiEqualFold(k, "host") { + return fmt.Errorf("promised request headers cannot include %q", k) + } + } + if err := checkValidHTTP2RequestHeaders(opts.Header); err != nil { + return err + } + + // The RFC effectively limits promised requests to GET and HEAD: + // "Promised requests MUST be cacheable [GET, HEAD, or POST], and MUST be safe [GET or HEAD]" + // http://tools.ietf.org/html/rfc7540#section-8.2 + if opts.Method != "GET" && opts.Method != "HEAD" { + return fmt.Errorf("method %q must be GET or HEAD", opts.Method) + } + + msg := &startPushRequest{ + parent: st, + method: opts.Method, + url: u, + header: cloneHeader(opts.Header), + done: sc.srv.state.getErrChan(), + } + + select { + case <-sc.doneServing: + return errClientDisconnected + case <-st.cw: + return errStreamClosed + case sc.serveMsgCh <- msg: + } + + select { + case <-sc.doneServing: + return errClientDisconnected + case <-st.cw: + return errStreamClosed + case err := <-msg.done: + sc.srv.state.putErrChan(msg.done) + return err + } +} + +type startPushRequest struct { + parent *stream + method string + url *url.URL + header http.Header + done chan error +} + +func (sc *serverConn) startPush(msg *startPushRequest) { + sc.serveG.check() + + // http://tools.ietf.org/html/rfc7540#section-6.6. + // PUSH_PROMISE frames MUST only be sent on a peer-initiated stream that + // is in either the "open" or "half-closed (remote)" state. + if msg.parent.state != stateOpen && msg.parent.state != stateHalfClosedRemote { + // responseWriter.Push checks that the stream is peer-initiated. + msg.done <- errStreamClosed + return + } + + // http://tools.ietf.org/html/rfc7540#section-6.6. + if !sc.pushEnabled { + msg.done <- http.ErrNotSupported + return + } + + // PUSH_PROMISE frames must be sent in increasing order by stream ID, so + // we allocate an ID for the promised stream lazily, when the PUSH_PROMISE + // is written. Once the ID is allocated, we start the request handler. + allocatePromisedID := func() (uint32, error) { + sc.serveG.check() + + // Check this again, just in case. Technically, we might have received + // an updated SETTINGS by the time we got around to writing this frame. + if !sc.pushEnabled { + return 0, http.ErrNotSupported + } + // http://tools.ietf.org/html/rfc7540#section-6.5.2. + if sc.curPushedStreams+1 > sc.clientMaxStreams { + return 0, ErrPushLimitReached + } + + // http://tools.ietf.org/html/rfc7540#section-5.1.1. + // Streams initiated by the server MUST use even-numbered identifiers. + // A server that is unable to establish a new stream identifier can send a GOAWAY + // frame so that the client is forced to open a new connection for new streams. + if sc.maxPushPromiseID+2 >= 1<<31 { + sc.startGracefulShutdownInternal() + return 0, ErrPushLimitReached + } + sc.maxPushPromiseID += 2 + promisedID := sc.maxPushPromiseID + + // http://tools.ietf.org/html/rfc7540#section-8.2. + // Strictly speaking, the new stream should start in "reserved (local)", then + // transition to "half closed (remote)" after sending the initial HEADERS, but + // we start in "half closed (remote)" for simplicity. + // See further comments at the definition of stateHalfClosedRemote. + promised := sc.newStream(promisedID, msg.parent.id, stateHalfClosedRemote) + rw, req, err := sc.newWriterAndRequestNoBody(promised, httpcommon.ServerRequestParam{ + Method: msg.method, + Scheme: msg.url.Scheme, + Authority: msg.url.Host, + Path: msg.url.RequestURI(), + Header: cloneHeader(msg.header), // clone since handler runs concurrently with writing the PUSH_PROMISE + }) + if err != nil { + // Should not happen, since we've already validated msg.url. + panic(fmt.Sprintf("newWriterAndRequestNoBody(%+v): %v", msg.url, err)) + } + + sc.curHandlers++ + go sc.runHandler(rw, req, sc.handler.ServeHTTP) + return promisedID, nil + } + + sc.writeFrame(FrameWriteRequest{ + write: &writePushPromise{ + streamID: msg.parent.id, + method: msg.method, + url: msg.url, + h: msg.header, + allocatePromisedID: allocatePromisedID, + }, + stream: msg.parent, + done: msg.done, + }) +} + +// foreachHeaderElement splits v according to the "#rule" construction +// in RFC 7230 section 7 and calls fn for each non-empty element. +func foreachHeaderElement(v string, fn func(string)) { + v = textproto.TrimString(v) + if v == "" { + return + } + if !strings.Contains(v, ",") { + fn(v) + return + } + for _, f := range strings.Split(v, ",") { + if f = textproto.TrimString(f); f != "" { + fn(f) + } + } +} + +// From http://httpwg.org/specs/rfc7540.html#rfc.section.8.1.2.2 +var connHeaders = []string{ + "Connection", + "Keep-Alive", + "Proxy-Connection", + "Transfer-Encoding", + "Upgrade", +} + +// checkValidHTTP2RequestHeaders checks whether h is a valid HTTP/2 request, +// per RFC 7540 Section 8.1.2.2. +// The returned error is reported to users. +func checkValidHTTP2RequestHeaders(h http.Header) error { + for _, k := range connHeaders { + if _, ok := h[k]; ok { + return fmt.Errorf("request header %q is not valid in HTTP/2", k) + } + } + te := h["Te"] + if len(te) > 0 && (len(te) > 1 || (te[0] != "trailers" && te[0] != "")) { + return errors.New(`request header "TE" may only be "trailers" in HTTP/2`) + } + return nil +} + +func new400Handler(err error) http.HandlerFunc { + return func(w http.ResponseWriter, r *http.Request) { + http.Error(w, err.Error(), http.StatusBadRequest) + } +} + +// h1ServerKeepAlivesDisabled reports whether hs has its keep-alives +// disabled. See comments on h1ServerShutdownChan above for why +// the code is written this way. +func h1ServerKeepAlivesDisabled(hs *http.Server) bool { + var x interface{} = hs + type I interface { + doKeepAlives() bool + } + if hs, ok := x.(I); ok { + return !hs.doKeepAlives() + } + return false +} + +func (sc *serverConn) countError(name string, err error) error { + if sc == nil || sc.srv == nil { + return err + } + f := sc.countErrorFunc + if f == nil { + return err + } + var typ string + var code ErrCode + switch e := err.(type) { + case ConnectionError: + typ = "conn" + code = ErrCode(e) + case StreamError: + typ = "stream" + code = ErrCode(e.Code) + default: + return err + } + codeStr := errCodeName[code] + if codeStr == "" { + codeStr = strconv.Itoa(int(code)) + } + f(fmt.Sprintf("%s_%s_%s", typ, codeStr, name)) + return err +} diff --git a/backend/vendor/github.com/enetx/http2/transport.go b/backend/vendor/github.com/enetx/http2/transport.go new file mode 100644 index 0000000..3b41d6f --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/transport.go @@ -0,0 +1,3271 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Transport code. + +package http2 + +import ( + "bufio" + "bytes" + "compress/gzip" + "context" + "crypto/rand" + "crypto/tls" + "errors" + "fmt" + "io" + "io/fs" + "log" + "math" + "math/bits" + mathrand "math/rand" + "net" + "net/textproto" + "strconv" + "strings" + "sync" + "sync/atomic" + "time" + + "github.com/enetx/http" + "github.com/enetx/http/httptrace" + + "github.com/enetx/http2/httpcommon" + "golang.org/x/net/http/httpguts" + "golang.org/x/net/http2/hpack" + "golang.org/x/net/idna" +) + +const ( + // transportDefaultConnFlow is how many connection-level flow control + // tokens we give the server at start-up, past the default 64k. + transportDefaultConnFlow = 1 << 30 + + // transportDefaultStreamFlow is how many stream-level flow + // control tokens we announce to the peer, and how many bytes + // we buffer per stream. + transportDefaultStreamFlow = 4 << 20 + + defaultUserAgent = "Go-http-client/2.0" + + // initialMaxConcurrentStreams is a connections maxConcurrentStreams until + // it's received servers initial SETTINGS frame, which corresponds with the + // spec's minimum recommended value. + initialMaxConcurrentStreams = 100 + + // defaultMaxConcurrentStreams is a connections default maxConcurrentStreams + // if the server doesn't include one in its initial SETTINGS frame. + defaultMaxConcurrentStreams = 1000 +) + +// Transport is an HTTP/2 Transport. +// +// A Transport internally caches connections to servers. It is safe +// for concurrent use by multiple goroutines. +type Transport struct { + // DialTLSContext specifies an optional dial function with context for + // creating TLS connections for requests. + // + // If DialTLSContext and DialTLS is nil, tls.Dial is used. + // + // If the returned net.Conn has a ConnectionState method like tls.Conn, + // it will be used to set http.Response.TLS. + DialTLSContext func(ctx context.Context, network, addr string, cfg *tls.Config) (net.Conn, error) + + // DialTLS specifies an optional dial function for creating + // TLS connections for requests. + // + // If DialTLSContext and DialTLS is nil, tls.Dial is used. + // + // Deprecated: Use DialTLSContext instead, which allows the transport + // to cancel dials as soon as they are no longer needed. + // If both are set, DialTLSContext takes priority. + DialTLS func(network, addr string, cfg *tls.Config) (net.Conn, error) + + // TLSClientConfig specifies the TLS configuration to use with + // tls.Client. If nil, the default configuration is used. + TLSClientConfig *tls.Config + + // ConnPool optionally specifies an alternate connection pool to use. + // If nil, the default is used. + ConnPool ClientConnPool + + // DisableCompression, if true, prevents the Transport from + // requesting compression with an "Accept-Encoding: gzip" + // request header when the Request contains no existing + // Accept-Encoding value. If the Transport requests gzip on + // its own and gets a gzipped response, it's transparently + // decoded in the Response.Body. However, if the user + // explicitly requested gzip it is not automatically + // uncompressed. + DisableCompression bool + + // AllowHTTP, if true, permits HTTP/2 requests using the insecure, + // plain-text "http" scheme. Note that this does not enable h2c support. + AllowHTTP bool + + // MaxHeaderListSize is the http2 SETTINGS_MAX_HEADER_LIST_SIZE to + // send in the initial settings frame. It is how many bytes + // of response headers are allowed. Unlike the http2 spec, zero here + // means to use a default limit (currently 10MB). If you actually + // want to advertise an unlimited value to the peer, Transport + // interprets the highest possible value here (0xffffffff or 1<<32-1) + // to mean no limit. + MaxHeaderListSize uint32 + + // MaxReadFrameSize is the http2 SETTINGS_MAX_FRAME_SIZE to send in the + // initial settings frame. It is the size in bytes of the largest frame + // payload that the sender is willing to receive. If 0, no setting is + // sent, and the value is provided by the peer, which should be 16384 + // according to the spec: + // https://datatracker.ietf.org/doc/html/rfc7540#section-6.5.2. + // Values are bounded in the range 16k to 16M. + MaxReadFrameSize uint32 + + // MaxDecoderHeaderTableSize optionally specifies the http2 + // SETTINGS_HEADER_TABLE_SIZE to send in the initial settings frame. It + // informs the remote endpoint of the maximum size of the header compression + // table used to decode header blocks, in octets. If zero, the default value + // of 4096 is used. + MaxDecoderHeaderTableSize uint32 + + // MaxEncoderHeaderTableSize optionally specifies an upper limit for the + // header compression table used for encoding request headers. Received + // SETTINGS_HEADER_TABLE_SIZE settings are capped at this limit. If zero, + // the default value of 4096 is used. + MaxEncoderHeaderTableSize uint32 + + // StrictMaxConcurrentStreams controls whether the server's + // SETTINGS_MAX_CONCURRENT_STREAMS should be respected + // globally. If false, new TCP connections are created to the + // server as needed to keep each under the per-connection + // SETTINGS_MAX_CONCURRENT_STREAMS limit. If true, the + // server's SETTINGS_MAX_CONCURRENT_STREAMS is interpreted as + // a global limit and callers of RoundTrip block when needed, + // waiting for their turn. + StrictMaxConcurrentStreams bool + + // IdleConnTimeout is the maximum amount of time an idle + // (keep-alive) connection will remain idle before closing + // itself. + // Zero means no limit. + IdleConnTimeout time.Duration + + // ReadIdleTimeout is the timeout after which a health check using ping + // frame will be carried out if no frame is received on the connection. + // Note that a ping response will is considered a received frame, so if + // there is no other traffic on the connection, the health check will + // be performed every ReadIdleTimeout interval. + // If zero, no health check is performed. + ReadIdleTimeout time.Duration + + // PingTimeout is the timeout after which the connection will be closed + // if a response to Ping is not received. + // Defaults to 15s. + PingTimeout time.Duration + + // WriteByteTimeout is the timeout after which the connection will be + // closed no data can be written to it. The timeout begins when data is + // available to write, and is extended whenever any bytes are written. + WriteByteTimeout time.Duration + + // CountError, if non-nil, is called on HTTP/2 transport errors. + // It's intended to increment a metric for monitoring, such + // as an expvar or Prometheus metric. + // The errType consists of only ASCII word characters. + CountError func(errType string) + + // t1, if non-nil, is the standard library Transport using + // this transport. Its settings are used (but not its + // RoundTrip method, etc). + t1 *http.Transport + + connPoolOnce sync.Once + connPoolOrDef ClientConnPool // non-nil version of ConnPool + + *transportTestHooks + + // Settings should not include InitialWindowSize or HeaderTableSize, set that in Transport + Settings []Setting + + ConnectionFlow uint32 + PriorityParam PriorityParam + PriorityFrames []PriorityFrame +} + +// Hook points used for testing. +// Outside of tests, t.transportTestHooks is nil and these all have minimal implementations. +// Inside tests, see the testSyncHooks function docs. + +type transportTestHooks struct { + newclientconn func(*ClientConn) +} + +func (t *Transport) maxHeaderListSize() uint32 { + n := int64(t.MaxHeaderListSize) + if t.t1 != nil && t.t1.MaxResponseHeaderBytes != 0 { + n = t.t1.MaxResponseHeaderBytes + if n > 0 { + n = adjustHTTP1MaxHeaderSize(n) + } + } + if n <= 0 { + return 10 << 20 + } + if n >= 0xffffffff { + return 0 + } + return uint32(n) +} + +func (t *Transport) disableCompression() bool { + return t.DisableCompression || (t.t1 != nil && t.t1.DisableCompression) +} + +// ConfigureTransport configures a net/http HTTP/1 Transport to use HTTP/2. +// It returns an error if t1 has already been HTTP/2-enabled. +// +// Use ConfigureTransports instead to configure the HTTP/2 Transport. +func ConfigureTransport(t1 *http.Transport) error { + _, err := ConfigureTransports(t1) + return err +} + +// ConfigureTransports configures a net/http HTTP/1 Transport to use HTTP/2. +// It returns a new HTTP/2 Transport for further configuration. +// It returns an error if t1 has already been HTTP/2-enabled. +func ConfigureTransports(t1 *http.Transport) (*Transport, error) { + return configureTransports(t1) +} + +func configureTransports(t1 *http.Transport) (*Transport, error) { + connPool := new(clientConnPool) + t2 := &Transport{ + ConnPool: noDialClientConnPool{connPool}, + t1: t1, + } + connPool.t = t2 + if err := registerHTTPSProtocol(t1, noDialH2RoundTripper{t2}); err != nil { + return nil, err + } + if t1.TLSClientConfig == nil { + t1.TLSClientConfig = new(tls.Config) + } + if !strSliceContains(t1.TLSClientConfig.NextProtos, "h2") { + t1.TLSClientConfig.NextProtos = append([]string{"h2"}, t1.TLSClientConfig.NextProtos...) + } + if !strSliceContains(t1.TLSClientConfig.NextProtos, "http/1.1") { + t1.TLSClientConfig.NextProtos = append(t1.TLSClientConfig.NextProtos, "http/1.1") + } + upgradeFn := func(scheme, authority string, c net.Conn) http.RoundTripper { + addr := authorityAddr(scheme, authority) + if used, err := connPool.addConnIfNeeded(addr, t2, c); err != nil { + go c.Close() + return erringRoundTripper{err} + } else if !used { + // Turns out we don't need this c. + // For example, two goroutines made requests to the same host + // at the same time, both kicking off TCP dials. (since protocol + // was unknown) + go c.Close() + } + if scheme == "http" { + return (*unencryptedTransport)(t2) + } + return t2 + } + if t1.TLSNextProto == nil { + t1.TLSNextProto = make(map[string]func(string, *tls.Conn) http.RoundTripper) + } + t1.TLSNextProto[NextProtoTLS] = func(authority string, c *tls.Conn) http.RoundTripper { + return upgradeFn("https", authority, c) + } + // The "unencrypted_http2" TLSNextProto key is used to pass off non-TLS HTTP/2 conns. + t1.TLSNextProto[nextProtoUnencryptedHTTP2] = func(authority string, c *tls.Conn) http.RoundTripper { + nc, err := unencryptedNetConnFromTLSConn(c) + if err != nil { + go c.Close() + return erringRoundTripper{err} + } + return upgradeFn("http", authority, nc) + } + return t2, nil +} + +// unencryptedTransport is a Transport with a RoundTrip method that +// always permits http:// URLs. +type unencryptedTransport Transport + +func (t *unencryptedTransport) RoundTrip(req *http.Request) (*http.Response, error) { + return (*Transport)(t).RoundTripOpt(req, RoundTripOpt{allowHTTP: true}) +} + +func (t *Transport) connPool() ClientConnPool { + t.connPoolOnce.Do(t.initConnPool) + return t.connPoolOrDef +} + +func (t *Transport) initConnPool() { + if t.ConnPool != nil { + t.connPoolOrDef = t.ConnPool + } else { + t.connPoolOrDef = &clientConnPool{t: t} + } +} + +// ClientConn is the state of a single HTTP/2 client connection to an +// HTTP/2 server. +type ClientConn struct { + t *Transport + tconn net.Conn // usually *tls.Conn, except specialized impls + tlsState *tls.ConnectionState // nil only for specialized impls + atomicReused uint32 // whether conn is being reused; atomic + singleUse bool // whether being used for a single http.Request + getConnCalled bool // used by clientConnPool + + // readLoop goroutine fields: + readerDone chan struct{} // closed on error + readerErr error // set before readerDone is closed + + idleTimeout time.Duration // or 0 for never + idleTimer *time.Timer + + mu sync.Mutex // guards following + cond *sync.Cond // hold mu; broadcast on flow/closed changes + flow outflow // our conn-level flow control quota (cs.outflow is per stream) + inflow inflow // peer's conn-level flow control + doNotReuse bool // whether conn is marked to not be reused for any future requests + closing bool + closed bool + closedOnIdle bool // true if conn was closed for idleness + seenSettings bool // true if we've seen a settings frame, false otherwise + seenSettingsChan chan struct{} // closed when seenSettings is true or frame reading fails + wantSettingsAck bool // we sent a SETTINGS frame and haven't heard back + goAway *GoAwayFrame // if non-nil, the GoAwayFrame we received + goAwayDebug string // goAway frame's debug data, retained as a string + streams map[uint32]*clientStream // client-initiated + streamsReserved int // incr by ReserveNewRequest; decr on RoundTrip + nextStreamID uint32 + pendingRequests int // requests blocked and waiting to be sent because len(streams) == maxConcurrentStreams + pings map[[8]byte]chan struct{} // in flight ping data to notification channel + br *bufio.Reader + lastActive time.Time + lastIdle time.Time // time last idle + // Settings from peer: (also guarded by wmu) + maxFrameSize uint32 + maxConcurrentStreams uint32 + peerMaxHeaderListSize uint64 + peerMaxHeaderTableSize uint32 + initialWindowSize uint32 + initialStreamRecvWindowSize int32 + readIdleTimeout time.Duration + pingTimeout time.Duration + extendedConnectAllowed bool + strictMaxConcurrentStreams bool + + // rstStreamPingsBlocked works around an unfortunate gRPC behavior. + // gRPC strictly limits the number of PING frames that it will receive. + // The default is two pings per two hours, but the limit resets every time + // the gRPC endpoint sends a HEADERS or DATA frame. See golang/go#70575. + // + // rstStreamPingsBlocked is set after receiving a response to a PING frame + // bundled with an RST_STREAM (see pendingResets below), and cleared after + // receiving a HEADERS or DATA frame. + rstStreamPingsBlocked bool + + // pendingResets is the number of RST_STREAM frames we have sent to the peer, + // without confirming that the peer has received them. When we send a RST_STREAM, + // we bundle it with a PING frame, unless a PING is already in flight. We count + // the reset stream against the connection's concurrency limit until we get + // a PING response. This limits the number of requests we'll try to send to a + // completely unresponsive connection. + pendingResets int + + // reqHeaderMu is a 1-element semaphore channel controlling access to sending new requests. + // Write to reqHeaderMu to lock it, read from it to unlock. + // Lock reqmu BEFORE mu or wmu. + reqHeaderMu chan struct{} + + // wmu is held while writing. + // Acquire BEFORE mu when holding both, to avoid blocking mu on network writes. + // Only acquire both at the same time when changing peer settings. + wmu sync.Mutex + bw *bufio.Writer + fr *Framer + werr error // first write error that has occurred + hbuf bytes.Buffer // HPACK encoder writes into this + henc *hpack.Encoder +} + +// clientStream is the state for a single HTTP/2 stream. One of these +// is created for each Transport.RoundTrip call. +type clientStream struct { + cc *ClientConn + + // Fields of Request that we may access even after the response body is closed. + ctx context.Context + reqCancel <-chan struct{} + + trace *httptrace.ClientTrace // or nil + ID uint32 + bufPipe pipe // buffered pipe with the flow-controlled response payload + requestedGzip bool + isHead bool + + abortOnce sync.Once + abort chan struct{} // closed to signal stream should end immediately + abortErr error // set if abort is closed + + peerClosed chan struct{} // closed when the peer sends an END_STREAM flag + donec chan struct{} // closed after the stream is in the closed state + on100 chan struct{} // buffered; written to if a 100 is received + + respHeaderRecv chan struct{} // closed when headers are received + res *http.Response // set if respHeaderRecv is closed + + flow outflow // guarded by cc.mu + inflow inflow // guarded by cc.mu + bytesRemain int64 // -1 means unknown; owned by transportResponseBody.Read + readErr error // sticky read error; owned by transportResponseBody.Read + + reqBody io.ReadCloser + reqBodyContentLength int64 // -1 means unknown + reqBodyClosed chan struct{} // guarded by cc.mu; non-nil on Close, closed when done + + // owned by writeRequest: + sentEndStream bool // sent an END_STREAM flag to the peer + sentHeaders bool + + // owned by clientConnReadLoop: + firstByte bool // got the first response byte + pastHeaders bool // got first MetaHeadersFrame (actual headers) + pastTrailers bool // got optional second MetaHeadersFrame (trailers) + readClosed bool // peer sent an END_STREAM flag + readAborted bool // read loop reset the stream + totalHeaderSize int64 // total size of 1xx headers seen + + trailer http.Header // accumulated trailers + resTrailer *http.Header // client's Response.Trailer +} + +var got1xxFuncForTests func(int, textproto.MIMEHeader) error + +// get1xxTraceFunc returns the value of request's httptrace.ClientTrace.Got1xxResponse func, +// if any. It returns nil if not set or if the Go version is too old. +func (cs *clientStream) get1xxTraceFunc() func(int, textproto.MIMEHeader) error { + if fn := got1xxFuncForTests; fn != nil { + return fn + } + return traceGot1xxResponseFunc(cs.trace) +} + +func (cs *clientStream) abortStream(err error) { + cs.cc.mu.Lock() + defer cs.cc.mu.Unlock() + cs.abortStreamLocked(err) +} + +func (cs *clientStream) abortStreamLocked(err error) { + cs.abortOnce.Do(func() { + cs.abortErr = err + close(cs.abort) + }) + if cs.reqBody != nil { + cs.closeReqBodyLocked() + } + // TODO(dneil): Clean up tests where cs.cc.cond is nil. + if cs.cc.cond != nil { + // Wake up writeRequestBody if it is waiting on flow control. + cs.cc.cond.Broadcast() + } +} + +func (cs *clientStream) abortRequestBodyWrite() { + cc := cs.cc + cc.mu.Lock() + defer cc.mu.Unlock() + if cs.reqBody != nil && cs.reqBodyClosed == nil { + cs.closeReqBodyLocked() + cc.cond.Broadcast() + } +} + +func (cs *clientStream) closeReqBodyLocked() { + if cs.reqBodyClosed != nil { + return + } + cs.reqBodyClosed = make(chan struct{}) + reqBodyClosed := cs.reqBodyClosed + go func() { + cs.reqBody.Close() + close(reqBodyClosed) + }() +} + +type stickyErrWriter struct { + conn net.Conn + timeout time.Duration + err *error +} + +func (sew stickyErrWriter) Write(p []byte) (n int, err error) { + if *sew.err != nil { + return 0, *sew.err + } + n, err = writeWithByteTimeout(sew.conn, sew.timeout, p) + *sew.err = err + return n, err +} + +// noCachedConnError is the concrete type of ErrNoCachedConn, which +// needs to be detected by net/http regardless of whether it's its +// bundled version (in h2_bundle.go with a rewritten type name) or +// from a user's x/net/http2. As such, as it has a unique method name +// (IsHTTP2NoCachedConnError) that net/http sniffs for via func +// isNoCachedConnError. +type noCachedConnError struct{} + +func (noCachedConnError) IsHTTP2NoCachedConnError() {} +func (noCachedConnError) Error() string { return "http2: no cached connection was available" } + +// isNoCachedConnError reports whether err is of type noCachedConnError +// or its equivalent renamed type in net/http2's h2_bundle.go. Both types +// may coexist in the same running program. +func isNoCachedConnError(err error) bool { + _, ok := err.(interface{ IsHTTP2NoCachedConnError() }) + return ok +} + +var ErrNoCachedConn error = noCachedConnError{} + +// RoundTripOpt are options for the Transport.RoundTripOpt method. +type RoundTripOpt struct { + // OnlyCachedConn controls whether RoundTripOpt may + // create a new TCP connection. If set true and + // no cached connection is available, RoundTripOpt + // will return ErrNoCachedConn. + OnlyCachedConn bool + + allowHTTP bool // allow http:// URLs +} + +func (t *Transport) RoundTrip(req *http.Request) (*http.Response, error) { + return t.RoundTripOpt(req, RoundTripOpt{}) +} + +// authorityAddr returns a given authority (a host/IP, or host:port / ip:port) +// and returns a host:port. The port 443 is added if needed. +func authorityAddr(scheme string, authority string) (addr string) { + host, port, err := net.SplitHostPort(authority) + if err != nil { // authority didn't have a port + host = authority + port = "" + } + if port == "" { // authority's port was empty + port = "443" + if scheme == "http" { + port = "80" + } + } + if a, err := idna.ToASCII(host); err == nil { + host = a + } + // IPv6 address literal, without a port: + if strings.HasPrefix(host, "[") && strings.HasSuffix(host, "]") { + return host + ":" + port + } + return net.JoinHostPort(host, port) +} + +// RoundTripOpt is like RoundTrip, but takes options. +func (t *Transport) RoundTripOpt(req *http.Request, opt RoundTripOpt) (*http.Response, error) { + switch req.URL.Scheme { + case "https": + // Always okay. + case "http": + if !t.AllowHTTP && !opt.allowHTTP { + return nil, errors.New("http2: unencrypted HTTP/2 not enabled") + } + default: + return nil, errors.New("http2: unsupported scheme") + } + + addr := authorityAddr(req.URL.Scheme, req.URL.Host) + for retry := 0; ; retry++ { + cc, err := t.connPool().GetClientConn(req, addr) + if err != nil { + t.vlogf("http2: Transport failed to get client conn for %s: %v", addr, err) + return nil, err + } + reused := !atomic.CompareAndSwapUint32(&cc.atomicReused, 0, 1) + traceGotConn(req, cc, reused) + res, err := cc.RoundTrip(req) + if err != nil && retry <= 6 { + roundTripErr := err + if req, err = shouldRetryRequest(req, err); err == nil { + // After the first retry, do exponential backoff with 10% jitter. + if retry == 0 { + t.vlogf("RoundTrip retrying after failure: %v", roundTripErr) + continue + } + backoff := float64(uint(1) << (uint(retry) - 1)) + backoff += backoff * (0.1 * mathrand.Float64()) + d := time.Second * time.Duration(backoff) + tm := time.NewTimer(d) + select { + case <-tm.C: + t.vlogf("RoundTrip retrying after failure: %v", roundTripErr) + continue + case <-req.Context().Done(): + tm.Stop() + err = req.Context().Err() + } + } + } + if err == errClientConnNotEstablished { + // This ClientConn was created recently, + // this is the first request to use it, + // and the connection is closed and not usable. + // + // In this state, cc.idleTimer will remove the conn from the pool + // when it fires. Stop the timer and remove it here so future requests + // won't try to use this connection. + // + // If the timer has already fired and we're racing it, the redundant + // call to MarkDead is harmless. + if cc.idleTimer != nil { + cc.idleTimer.Stop() + } + t.connPool().MarkDead(cc) + } + if err != nil { + t.vlogf("RoundTrip failure: %v", err) + return nil, err + } + return res, nil + } +} + +// CloseIdleConnections closes any connections which were previously +// connected from previous requests but are now sitting idle. +// It does not interrupt any connections currently in use. +func (t *Transport) CloseIdleConnections() { + if cp, ok := t.connPool().(clientConnPoolIdleCloser); ok { + cp.closeIdleConnections() + } +} + +var ( + errClientConnClosed = errors.New("http2: client conn is closed") + errClientConnUnusable = errors.New("http2: client conn not usable") + errClientConnNotEstablished = errors.New("http2: client conn could not be established") + errClientConnGotGoAway = errors.New("http2: Transport received Server's graceful shutdown GOAWAY") + errClientConnForceClosed = errors.New("http2: client connection force closed via ClientConn.Close") +) + +// shouldRetryRequest is called by RoundTrip when a request fails to get +// response headers. It is always called with a non-nil error. +// It returns either a request to retry (either the same request, or a +// modified clone), or an error if the request can't be replayed. +func shouldRetryRequest(req *http.Request, err error) (*http.Request, error) { + if !canRetryError(err) { + return nil, err + } + // If the Body is nil (or http.NoBody), it's safe to reuse + // this request and its Body. + if req.Body == nil || req.Body == http.NoBody { + return req, nil + } + + // If the request body can be reset back to its original + // state via the optional req.GetBody, do that. + if req.GetBody != nil { + body, err := req.GetBody() + if err != nil { + return nil, err + } + newReq := *req + newReq.Body = body + return &newReq, nil + } + + // The Request.Body can't reset back to the beginning, but we + // don't seem to have started to read from it yet, so reuse + // the request directly. + if err == errClientConnUnusable { + return req, nil + } + + return nil, fmt.Errorf("http2: Transport: cannot retry err [%v] after Request.Body was written; define Request.GetBody to avoid this error", err) +} + +func canRetryError(err error) bool { + if err == errClientConnUnusable || err == errClientConnGotGoAway { + return true + } + if se, ok := err.(StreamError); ok { + if se.Code == ErrCodeProtocol && se.Cause == errFromPeer { + // See golang/go#47635, golang/go#42777 + return true + } + return se.Code == ErrCodeRefusedStream + } + return false +} + +func (t *Transport) dialClientConn(ctx context.Context, addr string, singleUse bool) (*ClientConn, error) { + if t.transportTestHooks != nil { + return t.newClientConn(nil, singleUse) + } + host, _, err := net.SplitHostPort(addr) + if err != nil { + return nil, err + } + tconn, err := t.dialTLS(ctx, "tcp", addr, t.newTLSConfig(host)) + if err != nil { + return nil, err + } + return t.newClientConn(tconn, singleUse) +} + +func (t *Transport) newTLSConfig(host string) *tls.Config { + cfg := new(tls.Config) + if t.TLSClientConfig != nil { + *cfg = *t.TLSClientConfig.Clone() + } + if !strSliceContains(cfg.NextProtos, NextProtoTLS) { + cfg.NextProtos = append([]string{NextProtoTLS}, cfg.NextProtos...) + } + if cfg.ServerName == "" { + cfg.ServerName = host + } + return cfg +} + +func (t *Transport) dialTLS(ctx context.Context, network, addr string, tlsCfg *tls.Config) (net.Conn, error) { + if t.DialTLSContext != nil { + return t.DialTLSContext(ctx, network, addr, tlsCfg) + } else if t.DialTLS != nil { + return t.DialTLS(network, addr, tlsCfg) + } + + tlsCn, err := t.dialTLSWithContext(ctx, network, addr, tlsCfg) + if err != nil { + return nil, err + } + state := tlsCn.ConnectionState() + if p := state.NegotiatedProtocol; p != NextProtoTLS { + return nil, fmt.Errorf("http2: unexpected ALPN protocol %q; want %q", p, NextProtoTLS) + } + if !state.NegotiatedProtocolIsMutual { + return nil, errors.New("http2: could not negotiate protocol mutually") + } + return tlsCn, nil +} + +// disableKeepAlives reports whether connections should be closed as +// soon as possible after handling the first request. +func (t *Transport) disableKeepAlives() bool { + return t.t1 != nil && t.t1.DisableKeepAlives +} + +func (t *Transport) expectContinueTimeout() time.Duration { + if t.t1 == nil { + return 0 + } + return t.t1.ExpectContinueTimeout +} + +func (t *Transport) NewClientConn(c net.Conn) (*ClientConn, error) { + return t.newClientConn(c, t.disableKeepAlives()) +} + +func (t *Transport) newClientConn(c net.Conn, singleUse bool) (*ClientConn, error) { + conf := configFromTransport(t) + cc := &ClientConn{ + t: t, + tconn: c, + readerDone: make(chan struct{}), + nextStreamID: 1, + maxFrameSize: 16 << 10, // spec default + initialWindowSize: 65535, // spec default + initialStreamRecvWindowSize: conf.MaxUploadBufferPerStream, + maxConcurrentStreams: initialMaxConcurrentStreams, // "infinite", per spec. Use a smaller value until we have received server settings. + strictMaxConcurrentStreams: conf.StrictMaxConcurrentRequests, + peerMaxHeaderListSize: 0xffffffffffffffff, // "infinite", per spec. Use 2^64-1 instead. + streams: make(map[uint32]*clientStream), + singleUse: singleUse, + seenSettingsChan: make(chan struct{}), + wantSettingsAck: true, + readIdleTimeout: conf.SendPingTimeout, + pingTimeout: conf.PingTimeout, + pings: make(map[[8]byte]chan struct{}), + reqHeaderMu: make(chan struct{}, 1), + lastActive: time.Now(), + } + if t.transportTestHooks != nil { + t.transportTestHooks.newclientconn(cc) + c = cc.tconn + } + if VerboseLogs { + t.vlogf("http2: Transport creating client conn %p to %v", cc, c.RemoteAddr()) + } + + cc.cond = sync.NewCond(&cc.mu) + cc.flow.add(int32(initialWindowSize)) + + // TODO: adjust this writer size to account for frame size + + // MTU + crypto/tls record padding. + cc.bw = bufio.NewWriter(stickyErrWriter{ + conn: c, + timeout: conf.WriteByteTimeout, + err: &cc.werr, + }) + cc.br = bufio.NewReader(c) + cc.fr = NewFramer(cc.bw, cc.br) + cc.fr.SetMaxReadFrameSize(conf.MaxReadFrameSize) + if t.CountError != nil { + cc.fr.countError = t.CountError + } + maxHeaderTableSize := conf.MaxDecoderHeaderTableSize + + for _, setting := range t.Settings { + switch setting.ID { + case SettingMaxFrameSize: + cc.maxFrameSize = setting.Val + case SettingMaxHeaderListSize: + t.MaxHeaderListSize = setting.Val + case SettingHeaderTableSize: + maxHeaderTableSize = setting.Val + } + } + + cc.fr.ReadMetaHeaders = hpack.NewDecoder(maxHeaderTableSize, nil) + cc.fr.MaxHeaderListSize = t.maxHeaderListSize() + + cc.henc = hpack.NewEncoder(&cc.hbuf) + cc.henc.SetMaxDynamicTableSizeLimit(conf.MaxEncoderHeaderTableSize) + cc.peerMaxHeaderTableSize = initialHeaderTableSize + + if cs, ok := c.(connectionStater); ok { + state := cs.ConnectionState() + cc.tlsState = &state + } + + initialSettings := t.Settings + + if len(t.Settings) == 0 { + initialSettings = []Setting{ + {ID: SettingEnablePush, Val: 0}, + {ID: SettingInitialWindowSize, Val: uint32(cc.initialStreamRecvWindowSize)}, + } + + initialSettings = append(initialSettings, Setting{ID: SettingMaxFrameSize, Val: conf.MaxReadFrameSize}) + if max := t.maxHeaderListSize(); max != 0 { + initialSettings = append(initialSettings, Setting{ID: SettingMaxHeaderListSize, Val: max}) + } + if maxHeaderTableSize != initialHeaderTableSize { + initialSettings = append(initialSettings, Setting{ID: SettingHeaderTableSize, Val: maxHeaderTableSize}) + } + } + + cc.bw.Write(clientPreface) + cc.fr.WriteSettings(initialSettings...) + + for _, p := range t.PriorityFrames { + cc.fr.WritePriority(p.StreamID, p.PriorityParam) + cc.nextStreamID = p.StreamID + 2 + } + + if cc.t.ConnectionFlow != 0 { + conf.MaxUploadBufferPerConnection = int32(cc.t.ConnectionFlow) + } + + cc.fr.WriteWindowUpdate(0, uint32(conf.MaxUploadBufferPerConnection)) + cc.inflow.init(conf.MaxUploadBufferPerConnection + initialWindowSize) + cc.bw.Flush() + if cc.werr != nil { + cc.Close() + return nil, cc.werr + } + + // Start the idle timer after the connection is fully initialized. + if d := t.idleConnTimeout(); d != 0 { + cc.idleTimeout = d + cc.idleTimer = time.AfterFunc(d, cc.onIdleTimeout) + } + + go cc.readLoop() + return cc, nil +} + +func (cc *ClientConn) healthCheck() { + pingTimeout := cc.pingTimeout + // We don't need to periodically ping in the health check, because the readLoop of ClientConn will + // trigger the healthCheck again if there is no frame received. + ctx, cancel := context.WithTimeout(context.Background(), pingTimeout) + defer cancel() + cc.vlogf("http2: Transport sending health check") + err := cc.Ping(ctx) + if err != nil { + cc.vlogf("http2: Transport health check failure: %v", err) + cc.closeForLostPing() + } else { + cc.vlogf("http2: Transport health check success") + } +} + +// SetDoNotReuse marks cc as not reusable for future HTTP requests. +func (cc *ClientConn) SetDoNotReuse() { + cc.mu.Lock() + defer cc.mu.Unlock() + cc.doNotReuse = true +} + +func (cc *ClientConn) setGoAway(f *GoAwayFrame) { + cc.mu.Lock() + defer cc.mu.Unlock() + + old := cc.goAway + cc.goAway = f + + // Merge the previous and current GoAway error frames. + if cc.goAwayDebug == "" { + cc.goAwayDebug = string(f.DebugData()) + } + if old != nil && old.ErrCode != ErrCodeNo { + cc.goAway.ErrCode = old.ErrCode + } + last := f.LastStreamID + for streamID, cs := range cc.streams { + if streamID <= last { + // The server's GOAWAY indicates that it received this stream. + // It will either finish processing it, or close the connection + // without doing so. Either way, leave the stream alone for now. + continue + } + if streamID == 1 && cc.goAway.ErrCode != ErrCodeNo { + // Don't retry the first stream on a connection if we get a non-NO error. + // If the server is sending an error on a new connection, + // retrying the request on a new one probably isn't going to work. + cs.abortStreamLocked(fmt.Errorf("http2: Transport received GOAWAY from server ErrCode:%v", cc.goAway.ErrCode)) + } else { + // Aborting the stream with errClentConnGotGoAway indicates that + // the request should be retried on a new connection. + cs.abortStreamLocked(errClientConnGotGoAway) + } + } +} + +// CanTakeNewRequest reports whether the connection can take a new request, +// meaning it has not been closed or received or sent a GOAWAY. +// +// If the caller is going to immediately make a new request on this +// connection, use ReserveNewRequest instead. +func (cc *ClientConn) CanTakeNewRequest() bool { + cc.mu.Lock() + defer cc.mu.Unlock() + return cc.canTakeNewRequestLocked() +} + +// ReserveNewRequest is like CanTakeNewRequest but also reserves a +// concurrent stream in cc. The reservation is decremented on the +// next call to RoundTrip. +func (cc *ClientConn) ReserveNewRequest() bool { + cc.mu.Lock() + defer cc.mu.Unlock() + if st := cc.idleStateLocked(); !st.canTakeNewRequest { + return false + } + cc.streamsReserved++ + return true +} + +// ClientConnState describes the state of a ClientConn. +type ClientConnState struct { + // Closed is whether the connection is closed. + Closed bool + + // Closing is whether the connection is in the process of + // closing. It may be closing due to shutdown, being a + // single-use connection, being marked as DoNotReuse, or + // having received a GOAWAY frame. + Closing bool + + // StreamsActive is how many streams are active. + StreamsActive int + + // StreamsReserved is how many streams have been reserved via + // ClientConn.ReserveNewRequest. + StreamsReserved int + + // StreamsPending is how many requests have been sent in excess + // of the peer's advertised MaxConcurrentStreams setting and + // are waiting for other streams to complete. + StreamsPending int + + // MaxConcurrentStreams is how many concurrent streams the + // peer advertised as acceptable. Zero means no SETTINGS + // frame has been received yet. + MaxConcurrentStreams uint32 + + // LastIdle, if non-zero, is when the connection last + // transitioned to idle state. + LastIdle time.Time +} + +// State returns a snapshot of cc's state. +func (cc *ClientConn) State() ClientConnState { + cc.wmu.Lock() + maxConcurrent := cc.maxConcurrentStreams + if !cc.seenSettings { + maxConcurrent = 0 + } + cc.wmu.Unlock() + + cc.mu.Lock() + defer cc.mu.Unlock() + return ClientConnState{ + Closed: cc.closed, + Closing: cc.closing || cc.singleUse || cc.doNotReuse || cc.goAway != nil, + StreamsActive: len(cc.streams) + cc.pendingResets, + StreamsReserved: cc.streamsReserved, + StreamsPending: cc.pendingRequests, + LastIdle: cc.lastIdle, + MaxConcurrentStreams: maxConcurrent, + } +} + +// clientConnIdleState describes the suitability of a client +// connection to initiate a new RoundTrip request. +type clientConnIdleState struct { + canTakeNewRequest bool +} + +func (cc *ClientConn) idleState() clientConnIdleState { + cc.mu.Lock() + defer cc.mu.Unlock() + return cc.idleStateLocked() +} + +func (cc *ClientConn) idleStateLocked() (st clientConnIdleState) { + if cc.singleUse && cc.nextStreamID > 1 { + return + } + var maxConcurrentOkay bool + if cc.strictMaxConcurrentStreams { + // We'll tell the caller we can take a new request to + // prevent the caller from dialing a new TCP + // connection, but then we'll block later before + // writing it. + maxConcurrentOkay = true + } else { + // We can take a new request if the total of + // - active streams; + // - reservation slots for new streams; and + // - streams for which we have sent a RST_STREAM and a PING, + // but received no subsequent frame + // is less than the concurrency limit. + maxConcurrentOkay = cc.currentRequestCountLocked() < int(cc.maxConcurrentStreams) + } + + st.canTakeNewRequest = cc.goAway == nil && !cc.closed && !cc.closing && maxConcurrentOkay && + !cc.doNotReuse && + int64(cc.nextStreamID)+2*int64(cc.pendingRequests) < math.MaxInt32 && + !cc.tooIdleLocked() + + // If this connection has never been used for a request and is closed, + // then let it take a request (which will fail). + // If the conn was closed for idleness, we're racing the idle timer; + // don't try to use the conn. (Issue #70515.) + // + // This avoids a situation where an error early in a connection's lifetime + // goes unreported. + if cc.nextStreamID == 1 && cc.streamsReserved == 0 && cc.closed && !cc.closedOnIdle { + st.canTakeNewRequest = true + } + + return +} + +// currentRequestCountLocked reports the number of concurrency slots currently in use, +// including active streams, reserved slots, and reset streams waiting for acknowledgement. +func (cc *ClientConn) currentRequestCountLocked() int { + return len(cc.streams) + cc.streamsReserved + cc.pendingResets +} + +func (cc *ClientConn) canTakeNewRequestLocked() bool { + st := cc.idleStateLocked() + return st.canTakeNewRequest +} + +// tooIdleLocked reports whether this connection has been been sitting idle +// for too much wall time. +func (cc *ClientConn) tooIdleLocked() bool { + // The Round(0) strips the monontonic clock reading so the + // times are compared based on their wall time. We don't want + // to reuse a connection that's been sitting idle during + // VM/laptop suspend if monotonic time was also frozen. + return cc.idleTimeout != 0 && !cc.lastIdle.IsZero() && time.Since(cc.lastIdle.Round(0)) > cc.idleTimeout +} + +// onIdleTimeout is called from a time.AfterFunc goroutine. It will +// only be called when we're idle, but because we're coming from a new +// goroutine, there could be a new request coming in at the same time, +// so this simply calls the synchronized closeIfIdle to shut down this +// connection. The timer could just call closeIfIdle, but this is more +// clear. +func (cc *ClientConn) onIdleTimeout() { + cc.closeIfIdle() +} + +func (cc *ClientConn) closeConn() { + t := time.AfterFunc(250*time.Millisecond, cc.forceCloseConn) + defer t.Stop() + cc.tconn.Close() +} + +// A tls.Conn.Close can hang for a long time if the peer is unresponsive. +// Try to shut it down more aggressively. +func (cc *ClientConn) forceCloseConn() { + tc, ok := cc.tconn.(*tls.Conn) + if !ok { + return + } + if nc := tc.NetConn(); nc != nil { + nc.Close() + } +} + +func (cc *ClientConn) closeIfIdle() { + cc.mu.Lock() + if len(cc.streams) > 0 || cc.streamsReserved > 0 { + cc.mu.Unlock() + return + } + cc.closed = true + cc.closedOnIdle = true + nextID := cc.nextStreamID + // TODO: do clients send GOAWAY too? maybe? Just Close: + cc.mu.Unlock() + + if VerboseLogs { + cc.vlogf("http2: Transport closing idle conn %p (forSingleUse=%v, maxStream=%v)", cc, cc.singleUse, nextID-2) + } + cc.closeConn() +} + +func (cc *ClientConn) isDoNotReuseAndIdle() bool { + cc.mu.Lock() + defer cc.mu.Unlock() + return cc.doNotReuse && len(cc.streams) == 0 +} + +var shutdownEnterWaitStateHook = func() {} + +// Shutdown gracefully closes the client connection, waiting for running streams to complete. +func (cc *ClientConn) Shutdown(ctx context.Context) error { + if err := cc.sendGoAway(); err != nil { + return err + } + // Wait for all in-flight streams to complete or connection to close + done := make(chan struct{}) + cancelled := false // guarded by cc.mu + go func() { + cc.mu.Lock() + defer cc.mu.Unlock() + for { + if len(cc.streams) == 0 || cc.closed { + cc.closed = true + close(done) + break + } + if cancelled { + break + } + cc.cond.Wait() + } + }() + shutdownEnterWaitStateHook() + select { + case <-done: + cc.closeConn() + return nil + case <-ctx.Done(): + cc.mu.Lock() + // Free the goroutine above + cancelled = true + cc.cond.Broadcast() + cc.mu.Unlock() + return ctx.Err() + } +} + +func (cc *ClientConn) sendGoAway() error { + cc.mu.Lock() + closing := cc.closing + cc.closing = true + maxStreamID := cc.nextStreamID + cc.mu.Unlock() + if closing { + // GOAWAY sent already + return nil + } + + cc.wmu.Lock() + defer cc.wmu.Unlock() + // Send a graceful shutdown frame to server + if err := cc.fr.WriteGoAway(maxStreamID, ErrCodeNo, nil); err != nil { + return err + } + if err := cc.bw.Flush(); err != nil { + return err + } + // Prevent new requests + return nil +} + +// closes the client connection immediately. In-flight requests are interrupted. +// err is sent to streams. +func (cc *ClientConn) closeForError(err error) { + cc.mu.Lock() + cc.closed = true + for _, cs := range cc.streams { + cs.abortStreamLocked(err) + } + cc.cond.Broadcast() + cc.mu.Unlock() + cc.closeConn() +} + +// Close closes the client connection immediately. +// +// In-flight requests are interrupted. For a graceful shutdown, use Shutdown instead. +func (cc *ClientConn) Close() error { + cc.closeForError(errClientConnForceClosed) + return nil +} + +// closes the client connection immediately. In-flight requests are interrupted. +func (cc *ClientConn) closeForLostPing() { + err := errors.New("http2: client connection lost") + if f := cc.t.CountError; f != nil { + f("conn_close_lost_ping") + } + cc.closeForError(err) +} + +// errRequestCanceled is a copy of net/http's errRequestCanceled because it's not +// exported. At least they'll be DeepEqual for h1-vs-h2 comparisons tests. +var errRequestCanceled = errors.New("net/http: request canceled") + +func (cc *ClientConn) responseHeaderTimeout() time.Duration { + if cc.t.t1 != nil { + return cc.t.t1.ResponseHeaderTimeout + } + // No way to do this (yet?) with just an http2.Transport. Probably + // no need. Request.Cancel this is the new way. We only need to support + // this for compatibility with the old http.Transport fields when + // we're doing transparent http2. + return 0 +} + +// actualContentLength returns a sanitized version of +// req.ContentLength, where 0 actually means zero (not unknown) and -1 +// means unknown. +func actualContentLength(req *http.Request) int64 { + if req.Body == nil || req.Body == http.NoBody { + return 0 + } + if req.ContentLength != 0 { + return req.ContentLength + } + return -1 +} + +func (cc *ClientConn) decrStreamReservations() { + cc.mu.Lock() + defer cc.mu.Unlock() + cc.decrStreamReservationsLocked() +} + +func (cc *ClientConn) decrStreamReservationsLocked() { + if cc.streamsReserved > 0 { + cc.streamsReserved-- + } +} + +func (cc *ClientConn) RoundTrip(req *http.Request) (*http.Response, error) { + return cc.roundTrip(req, nil) +} + +func (cc *ClientConn) roundTrip(req *http.Request, streamf func(*clientStream)) (*http.Response, error) { + ctx := req.Context() + cs := &clientStream{ + cc: cc, + ctx: ctx, + reqCancel: req.Cancel, + isHead: req.Method == "HEAD", + reqBody: req.Body, + reqBodyContentLength: actualContentLength(req), + trace: httptrace.ContextClientTrace(ctx), + peerClosed: make(chan struct{}), + abort: make(chan struct{}), + respHeaderRecv: make(chan struct{}), + donec: make(chan struct{}), + } + + cs.requestedGzip = httpcommon.IsRequestGzip(req.Method, req.Header, cc.t.disableCompression()) + + go cs.doRequest(req, streamf) + + waitDone := func() error { + select { + case <-cs.donec: + return nil + case <-ctx.Done(): + return ctx.Err() + case <-cs.reqCancel: + return errRequestCanceled + } + } + + handleResponseHeaders := func() (*http.Response, error) { + res := cs.res + if res.StatusCode > 299 { + // On error or status code 3xx, 4xx, 5xx, etc abort any + // ongoing write, assuming that the server doesn't care + // about our request body. If the server replied with 1xx or + // 2xx, however, then assume the server DOES potentially + // want our body (e.g. full-duplex streaming: + // golang.org/issue/13444). If it turns out the server + // doesn't, they'll RST_STREAM us soon enough. This is a + // heuristic to avoid adding knobs to Transport. Hopefully + // we can keep it. + cs.abortRequestBodyWrite() + } + res.Request = req + res.TLS = cc.tlsState + if res.Body == noBody && actualContentLength(req) == 0 { + // If there isn't a request or response body still being + // written, then wait for the stream to be closed before + // RoundTrip returns. + if err := waitDone(); err != nil { + return nil, err + } + } + return res, nil + } + + cancelRequest := func(cs *clientStream, err error) error { + cs.cc.mu.Lock() + bodyClosed := cs.reqBodyClosed + cs.cc.mu.Unlock() + // Wait for the request body to be closed. + // + // If nothing closed the body before now, abortStreamLocked + // will have started a goroutine to close it. + // + // Closing the body before returning avoids a race condition + // with net/http checking its readTrackingBody to see if the + // body was read from or closed. See golang/go#60041. + // + // The body is closed in a separate goroutine without the + // connection mutex held, but dropping the mutex before waiting + // will keep us from holding it indefinitely if the body + // close is slow for some reason. + if bodyClosed != nil { + <-bodyClosed + } + return err + } + + for { + select { + case <-cs.respHeaderRecv: + return handleResponseHeaders() + case <-cs.abort: + select { + case <-cs.respHeaderRecv: + // If both cs.respHeaderRecv and cs.abort are signaling, + // pick respHeaderRecv. The server probably wrote the + // response and immediately reset the stream. + // golang.org/issue/49645 + return handleResponseHeaders() + default: + waitDone() + return nil, cs.abortErr + } + case <-ctx.Done(): + err := ctx.Err() + cs.abortStream(err) + return nil, cancelRequest(cs, err) + case <-cs.reqCancel: + cs.abortStream(errRequestCanceled) + return nil, cancelRequest(cs, errRequestCanceled) + } + } +} + +// doRequest runs for the duration of the request lifetime. +// +// It sends the request and performs post-request cleanup (closing Request.Body, etc.). +func (cs *clientStream) doRequest(req *http.Request, streamf func(*clientStream)) { + err := cs.writeRequest(req, streamf) + cs.cleanupWriteRequest(err) +} + +var errExtendedConnectNotSupported = errors.New("net/http: extended connect not supported by peer") + +// writeRequest sends a request. +// +// It returns nil after the request is written, the response read, +// and the request stream is half-closed by the peer. +// +// It returns non-nil if the request ends otherwise. +// If the returned error is StreamError, the error Code may be used in resetting the stream. +func (cs *clientStream) writeRequest(req *http.Request, streamf func(*clientStream)) (err error) { + cc := cs.cc + ctx := cs.ctx + + // wait for setting frames to be received, a server can change this value later, + // but we just wait for the first settings frame + var isExtendedConnect bool + if req.Method == "CONNECT" && req.Header.Get(":protocol") != "" { + isExtendedConnect = true + } + + // Acquire the new-request lock by writing to reqHeaderMu. + // This lock guards the critical section covering allocating a new stream ID + // (requires mu) and creating the stream (requires wmu). + if cc.reqHeaderMu == nil { + panic("RoundTrip on uninitialized ClientConn") // for tests + } + if isExtendedConnect { + select { + case <-cs.reqCancel: + return errRequestCanceled + case <-ctx.Done(): + return ctx.Err() + case <-cc.seenSettingsChan: + if !cc.extendedConnectAllowed { + return errExtendedConnectNotSupported + } + } + } + select { + case cc.reqHeaderMu <- struct{}{}: + case <-cs.reqCancel: + return errRequestCanceled + case <-ctx.Done(): + return ctx.Err() + } + + cc.mu.Lock() + if cc.idleTimer != nil { + cc.idleTimer.Stop() + } + cc.decrStreamReservationsLocked() + if err := cc.awaitOpenSlotForStreamLocked(cs); err != nil { + cc.mu.Unlock() + <-cc.reqHeaderMu + return err + } + cc.addStreamLocked(cs) // assigns stream ID + if isConnectionCloseRequest(req) { + cc.doNotReuse = true + } + cc.mu.Unlock() + + if streamf != nil { + streamf(cs) + } + + continueTimeout := cc.t.expectContinueTimeout() + if continueTimeout != 0 { + if !httpguts.HeaderValuesContainsToken(req.Header["Expect"], "100-continue") { + continueTimeout = 0 + } else { + cs.on100 = make(chan struct{}, 1) + } + } + + // Past this point (where we send request headers), it is possible for + // RoundTrip to return successfully. Since the RoundTrip contract permits + // the caller to "mutate or reuse" the Request after closing the Response's Body, + // we must take care when referencing the Request from here on. + err = cs.encodeAndWriteHeaders(req) + <-cc.reqHeaderMu + if err != nil { + return err + } + + hasBody := cs.reqBodyContentLength != 0 + if !hasBody { + cs.sentEndStream = true + } else { + if continueTimeout != 0 { + traceWait100Continue(cs.trace) + timer := time.NewTimer(continueTimeout) + select { + case <-timer.C: + err = nil + case <-cs.on100: + err = nil + case <-cs.abort: + err = cs.abortErr + case <-ctx.Done(): + err = ctx.Err() + case <-cs.reqCancel: + err = errRequestCanceled + } + timer.Stop() + if err != nil { + traceWroteRequest(cs.trace, err) + return err + } + } + + if err = cs.writeRequestBody(req); err != nil { + if err != errStopReqBodyWrite { + traceWroteRequest(cs.trace, err) + return err + } + } else { + cs.sentEndStream = true + } + } + + traceWroteRequest(cs.trace, err) + + var respHeaderTimer <-chan time.Time + var respHeaderRecv chan struct{} + if d := cc.responseHeaderTimeout(); d != 0 { + timer := time.NewTimer(d) + defer timer.Stop() + respHeaderTimer = timer.C + respHeaderRecv = cs.respHeaderRecv + } + // Wait until the peer half-closes its end of the stream, + // or until the request is aborted (via context, error, or otherwise), + // whichever comes first. + for { + select { + case <-cs.peerClosed: + return nil + case <-respHeaderTimer: + return errTimeout + case <-respHeaderRecv: + respHeaderRecv = nil + respHeaderTimer = nil // keep waiting for END_STREAM + case <-cs.abort: + return cs.abortErr + case <-ctx.Done(): + return ctx.Err() + case <-cs.reqCancel: + return errRequestCanceled + } + } +} + +func (cs *clientStream) encodeAndWriteHeaders(req *http.Request) error { + cc := cs.cc + ctx := cs.ctx + + cc.wmu.Lock() + defer cc.wmu.Unlock() + + // If the request was canceled while waiting for cc.mu, just quit. + select { + case <-cs.abort: + return cs.abortErr + case <-ctx.Done(): + return ctx.Err() + case <-cs.reqCancel: + return errRequestCanceled + default: + } + + // Encode headers. + // + // we send: HEADERS{1}, CONTINUATION{0,} + DATA{0,} (DATA is + // sent by writeRequestBody below, along with any Trailers, + // again in form HEADERS{1}, CONTINUATION{0,}) + cc.hbuf.Reset() + res, err := encodeRequestHeaders(req, cs.requestedGzip, cc.peerMaxHeaderListSize, func(name, value string) { + cc.writeHeader(name, value) + }) + if err != nil { + return fmt.Errorf("http2: %w", err) + } + hdrs := cc.hbuf.Bytes() + + // Write the request. + endStream := !res.HasBody && !res.HasTrailers + cs.sentHeaders = true + err = cc.writeHeaders(cs.ID, endStream, int(cc.maxFrameSize), hdrs) + traceWroteHeaders(cs.trace) + return err +} + +func encodeRequestHeaders(req *http.Request, addGzipHeader bool, peerMaxHeaderListSize uint64, headerf func(name, value string)) (httpcommon.EncodeHeadersResult, error) { + return httpcommon.EncodeHeaders(req.Context(), httpcommon.EncodeHeadersParam{ + Request: httpcommon.Request{ + Header: httpcommon.Header(req.Header), + Trailer: req.Trailer, + URL: req.URL, + Host: req.Host, + Method: req.Method, + ActualContentLength: actualContentLength(req), + }, + AddGzipHeader: addGzipHeader, + PeerMaxHeaderListSize: peerMaxHeaderListSize, + DefaultUserAgent: defaultUserAgent, + }, headerf) +} + +// cleanupWriteRequest performs post-request tasks. +// +// If err (the result of writeRequest) is non-nil and the stream is not closed, +// cleanupWriteRequest will send a reset to the peer. +func (cs *clientStream) cleanupWriteRequest(err error) { + cc := cs.cc + + if cs.ID == 0 { + // We were canceled before creating the stream, so return our reservation. + cc.decrStreamReservations() + } + + // TODO: write h12Compare test showing whether + // Request.Body is closed by the Transport, + // and in multiple cases: server replies <=299 and >299 + // while still writing request body + cc.mu.Lock() + mustCloseBody := false + if cs.reqBody != nil && cs.reqBodyClosed == nil { + mustCloseBody = true + cs.reqBodyClosed = make(chan struct{}) + } + bodyClosed := cs.reqBodyClosed + closeOnIdle := cc.singleUse || cc.doNotReuse || cc.t.disableKeepAlives() || cc.goAway != nil + cc.mu.Unlock() + if mustCloseBody { + cs.reqBody.Close() + close(bodyClosed) + } + if bodyClosed != nil { + <-bodyClosed + } + + if err != nil && cs.sentEndStream { + // If the connection is closed immediately after the response is read, + // we may be aborted before finishing up here. If the stream was closed + // cleanly on both sides, there is no error. + select { + case <-cs.peerClosed: + err = nil + default: + } + } + if err != nil { + cs.abortStream(err) // possibly redundant, but harmless + if cs.sentHeaders { + if se, ok := err.(StreamError); ok { + if se.Cause != errFromPeer { + cc.writeStreamReset(cs.ID, se.Code, false, err) + } + } else { + // We're cancelling an in-flight request. + // + // This could be due to the server becoming unresponsive. + // To avoid sending too many requests on a dead connection, + // we let the request continue to consume a concurrency slot + // until we can confirm the server is still responding. + // We do this by sending a PING frame along with the RST_STREAM + // (unless a ping is already in flight). + // + // For simplicity, we don't bother tracking the PING payload: + // We reset cc.pendingResets any time we receive a PING ACK. + // + // We skip this if the conn is going to be closed on idle, + // because it's short lived and will probably be closed before + // we get the ping response. + ping := false + if !closeOnIdle { + cc.mu.Lock() + // rstStreamPingsBlocked works around a gRPC behavior: + // see comment on the field for details. + if !cc.rstStreamPingsBlocked { + if cc.pendingResets == 0 { + ping = true + } + cc.pendingResets++ + } + cc.mu.Unlock() + } + cc.writeStreamReset(cs.ID, ErrCodeCancel, ping, err) + } + } + cs.bufPipe.CloseWithError(err) // no-op if already closed + } else { + if cs.sentHeaders && !cs.sentEndStream { + cc.writeStreamReset(cs.ID, ErrCodeNo, false, nil) + } + cs.bufPipe.CloseWithError(errRequestCanceled) + } + if cs.ID != 0 { + cc.forgetStreamID(cs.ID) + } + + cc.wmu.Lock() + werr := cc.werr + cc.wmu.Unlock() + if werr != nil { + cc.Close() + } + + close(cs.donec) +} + +// awaitOpenSlotForStreamLocked waits until len(streams) < maxConcurrentStreams. +// Must hold cc.mu. +func (cc *ClientConn) awaitOpenSlotForStreamLocked(cs *clientStream) error { + for { + if cc.closed && cc.nextStreamID == 1 && cc.streamsReserved == 0 { + // This is the very first request sent to this connection. + // Return a fatal error which aborts the retry loop. + return errClientConnNotEstablished + } + cc.lastActive = time.Now() + if cc.closed || !cc.canTakeNewRequestLocked() { + return errClientConnUnusable + } + cc.lastIdle = time.Time{} + if cc.currentRequestCountLocked() < int(cc.maxConcurrentStreams) { + return nil + } + cc.pendingRequests++ + cc.cond.Wait() + cc.pendingRequests-- + select { + case <-cs.abort: + return cs.abortErr + default: + } + } +} + +// requires cc.wmu be held +func (cc *ClientConn) writeHeaders(streamID uint32, endStream bool, maxFrameSize int, hdrs []byte) error { + first := true // first frame written (HEADERS is first, then CONTINUATION) + for len(hdrs) > 0 && cc.werr == nil { + chunk := hdrs + if len(chunk) > maxFrameSize { + chunk = chunk[:maxFrameSize] + } + hdrs = hdrs[len(chunk):] + endHeaders := len(hdrs) == 0 + if first { + cc.fr.WriteHeaders(HeadersFrameParam{ + StreamID: streamID, + BlockFragment: chunk, + EndStream: endStream, + EndHeaders: endHeaders, + Priority: cc.t.PriorityParam, + }) + first = false + } else { + cc.fr.WriteContinuation(streamID, endHeaders, chunk) + } + } + cc.bw.Flush() + return cc.werr +} + +// internal error values; they don't escape to callers +var ( + // abort request body write; don't send cancel + errStopReqBodyWrite = errors.New("http2: aborting request body write") + + // abort request body write, but send stream reset of cancel. + errStopReqBodyWriteAndCancel = errors.New("http2: canceling request") + + errReqBodyTooLong = errors.New("http2: request body larger than specified content length") +) + +// frameScratchBufferLen returns the length of a buffer to use for +// outgoing request bodies to read/write to/from. +// +// It returns max(1, min(peer's advertised max frame size, +// Request.ContentLength+1, 512KB)). +func (cs *clientStream) frameScratchBufferLen(maxFrameSize int) int { + const max = 512 << 10 + n := int64(maxFrameSize) + if n > max { + n = max + } + if cl := cs.reqBodyContentLength; cl != -1 && cl+1 < n { + // Add an extra byte past the declared content-length to + // give the caller's Request.Body io.Reader a chance to + // give us more bytes than they declared, so we can catch it + // early. + n = cl + 1 + } + if n < 1 { + return 1 + } + return int(n) // doesn't truncate; max is 512K +} + +// Seven bufPools manage different frame sizes. This helps to avoid scenarios where long-running +// streaming requests using small frame sizes occupy large buffers initially allocated for prior +// requests needing big buffers. The size ranges are as follows: +// {0 KB, 16 KB], {16 KB, 32 KB], {32 KB, 64 KB], {64 KB, 128 KB], {128 KB, 256 KB], +// {256 KB, 512 KB], {512 KB, infinity} +// In practice, the maximum scratch buffer size should not exceed 512 KB due to +// frameScratchBufferLen(maxFrameSize), thus the "infinity pool" should never be used. +// It exists mainly as a safety measure, for potential future increases in max buffer size. +var bufPools [7]sync.Pool // of *[]byte +func bufPoolIndex(size int) int { + if size <= 16384 { + return 0 + } + size -= 1 + bits := bits.Len(uint(size)) + index := bits - 14 + if index >= len(bufPools) { + return len(bufPools) - 1 + } + return index +} + +func (cs *clientStream) writeRequestBody(req *http.Request) (err error) { + cc := cs.cc + body := cs.reqBody + sentEnd := false // whether we sent the final DATA frame w/ END_STREAM + + hasTrailers := req.Trailer != nil + remainLen := cs.reqBodyContentLength + hasContentLen := remainLen != -1 + + cc.mu.Lock() + maxFrameSize := int(cc.maxFrameSize) + cc.mu.Unlock() + + // Scratch buffer for reading into & writing from. + scratchLen := cs.frameScratchBufferLen(maxFrameSize) + var buf []byte + index := bufPoolIndex(scratchLen) + if bp, ok := bufPools[index].Get().(*[]byte); ok && len(*bp) >= scratchLen { + defer bufPools[index].Put(bp) + buf = *bp + } else { + buf = make([]byte, scratchLen) + defer bufPools[index].Put(&buf) + } + + var sawEOF bool + for !sawEOF { + n, err := body.Read(buf) + if hasContentLen { + remainLen -= int64(n) + if remainLen == 0 && err == nil { + // The request body's Content-Length was predeclared and + // we just finished reading it all, but the underlying io.Reader + // returned the final chunk with a nil error (which is one of + // the two valid things a Reader can do at EOF). Because we'd prefer + // to send the END_STREAM bit early, double-check that we're actually + // at EOF. Subsequent reads should return (0, EOF) at this point. + // If either value is different, we return an error in one of two ways below. + var scratch [1]byte + var n1 int + n1, err = body.Read(scratch[:]) + remainLen -= int64(n1) + } + if remainLen < 0 { + err = errReqBodyTooLong + return err + } + } + if err != nil { + cc.mu.Lock() + bodyClosed := cs.reqBodyClosed != nil + cc.mu.Unlock() + switch { + case bodyClosed: + return errStopReqBodyWrite + case err == io.EOF: + sawEOF = true + err = nil + default: + return err + } + } + + remain := buf[:n] + for len(remain) > 0 && err == nil { + var allowed int32 + allowed, err = cs.awaitFlowControl(len(remain)) + if err != nil { + return err + } + cc.wmu.Lock() + data := remain[:allowed] + remain = remain[allowed:] + sentEnd = sawEOF && len(remain) == 0 && !hasTrailers + err = cc.fr.WriteData(cs.ID, sentEnd, data) + if err == nil { + // TODO(bradfitz): this flush is for latency, not bandwidth. + // Most requests won't need this. Make this opt-in or + // opt-out? Use some heuristic on the body type? Nagel-like + // timers? Based on 'n'? Only last chunk of this for loop, + // unless flow control tokens are low? For now, always. + // If we change this, see comment below. + err = cc.bw.Flush() + } + cc.wmu.Unlock() + } + if err != nil { + return err + } + } + + if sentEnd { + // Already sent END_STREAM (which implies we have no + // trailers) and flushed, because currently all + // WriteData frames above get a flush. So we're done. + return nil + } + + // Since the RoundTrip contract permits the caller to "mutate or reuse" + // a request after the Response's Body is closed, verify that this hasn't + // happened before accessing the trailers. + cc.mu.Lock() + trailer := req.Trailer + err = cs.abortErr + cc.mu.Unlock() + if err != nil { + return err + } + + cc.wmu.Lock() + defer cc.wmu.Unlock() + var trls []byte + if len(trailer) > 0 { + trls, err = cc.encodeTrailers(trailer) + if err != nil { + return err + } + } + + // Two ways to send END_STREAM: either with trailers, or + // with an empty DATA frame. + if len(trls) > 0 { + err = cc.writeHeaders(cs.ID, true, maxFrameSize, trls) + } else { + err = cc.fr.WriteData(cs.ID, true, nil) + } + if ferr := cc.bw.Flush(); ferr != nil && err == nil { + err = ferr + } + return err +} + +// awaitFlowControl waits for [1, min(maxBytes, cc.cs.maxFrameSize)] flow +// control tokens from the server. +// It returns either the non-zero number of tokens taken or an error +// if the stream is dead. +func (cs *clientStream) awaitFlowControl(maxBytes int) (taken int32, err error) { + cc := cs.cc + ctx := cs.ctx + cc.mu.Lock() + defer cc.mu.Unlock() + for { + if cc.closed { + return 0, errClientConnClosed + } + if cs.reqBodyClosed != nil { + return 0, errStopReqBodyWrite + } + select { + case <-cs.abort: + return 0, cs.abortErr + case <-ctx.Done(): + return 0, ctx.Err() + case <-cs.reqCancel: + return 0, errRequestCanceled + default: + } + if a := cs.flow.available(); a > 0 { + take := a + if int(take) > maxBytes { + + take = int32(maxBytes) // can't truncate int; take is int32 + } + if take > int32(cc.maxFrameSize) { + take = int32(cc.maxFrameSize) + } + cs.flow.take(take) + return take, nil + } + cc.cond.Wait() + } +} + +// requires cc.wmu be held. +func (cc *ClientConn) encodeTrailers(trailer http.Header) ([]byte, error) { + cc.hbuf.Reset() + + hlSize := uint64(0) + for k, vv := range trailer { + for _, v := range vv { + hf := hpack.HeaderField{Name: k, Value: v} + hlSize += uint64(hf.Size()) + } + } + if hlSize > cc.peerMaxHeaderListSize { + return nil, errRequestHeaderListSize + } + + for k, vv := range trailer { + lowKey, ascii := httpcommon.LowerHeader(k) + if !ascii { + // Skip writing invalid headers. Per RFC 7540, Section 8.1.2, header + // field names have to be ASCII characters (just as in HTTP/1.x). + continue + } + // Transfer-Encoding, etc.. have already been filtered at the + // start of RoundTrip + for _, v := range vv { + cc.writeHeader(lowKey, v) + } + } + return cc.hbuf.Bytes(), nil +} + +func (cc *ClientConn) writeHeader(name, value string) { + if VerboseLogs { + log.Printf("http2: Transport encoding header %q = %q", name, value) + } + cc.henc.WriteField(hpack.HeaderField{Name: name, Value: value}) +} + +type resAndError struct { + _ incomparable + res *http.Response + err error +} + +// requires cc.mu be held. +func (cc *ClientConn) addStreamLocked(cs *clientStream) { + cs.flow.add(int32(cc.initialWindowSize)) + cs.flow.setConnFlow(&cc.flow) + cs.inflow.init(cc.initialStreamRecvWindowSize) + cs.ID = cc.nextStreamID + cc.nextStreamID += 2 + cc.streams[cs.ID] = cs + if cs.ID == 0 { + panic("assigned stream ID 0") + } +} + +func (cc *ClientConn) forgetStreamID(id uint32) { + cc.mu.Lock() + slen := len(cc.streams) + delete(cc.streams, id) + if len(cc.streams) != slen-1 { + panic("forgetting unknown stream id") + } + cc.lastActive = time.Now() + if len(cc.streams) == 0 && cc.idleTimer != nil { + cc.idleTimer.Reset(cc.idleTimeout) + cc.lastIdle = time.Now() + } + // Wake up writeRequestBody via clientStream.awaitFlowControl and + // wake up RoundTrip if there is a pending request. + cc.cond.Broadcast() + + closeOnIdle := cc.singleUse || cc.doNotReuse || cc.t.disableKeepAlives() || cc.goAway != nil + if closeOnIdle && cc.streamsReserved == 0 && len(cc.streams) == 0 { + if VerboseLogs { + cc.vlogf("http2: Transport closing idle conn %p (forSingleUse=%v, maxStream=%v)", cc, cc.singleUse, cc.nextStreamID-2) + } + cc.closed = true + defer cc.closeConn() + } + + cc.mu.Unlock() +} + +// clientConnReadLoop is the state owned by the clientConn's frame-reading readLoop. +type clientConnReadLoop struct { + _ incomparable + cc *ClientConn +} + +// readLoop runs in its own goroutine and reads and dispatches frames. +func (cc *ClientConn) readLoop() { + rl := &clientConnReadLoop{cc: cc} + defer rl.cleanup() + cc.readerErr = rl.run() + if ce, ok := cc.readerErr.(ConnectionError); ok { + cc.wmu.Lock() + cc.fr.WriteGoAway(0, ErrCode(ce), nil) + cc.wmu.Unlock() + } +} + +// GoAwayError is returned by the Transport when the server closes the +// TCP connection after sending a GOAWAY frame. +type GoAwayError struct { + LastStreamID uint32 + ErrCode ErrCode + DebugData string +} + +func (e GoAwayError) Error() string { + return fmt.Sprintf("http2: server sent GOAWAY and closed the connection; LastStreamID=%v, ErrCode=%v, debug=%q", + e.LastStreamID, e.ErrCode, e.DebugData) +} + +func isEOFOrNetReadError(err error) bool { + if err == io.EOF { + return true + } + ne, ok := err.(*net.OpError) + return ok && ne.Op == "read" +} + +func (rl *clientConnReadLoop) cleanup() { + cc := rl.cc + defer cc.closeConn() + defer close(cc.readerDone) + + if cc.idleTimer != nil { + cc.idleTimer.Stop() + } + + // Close any response bodies if the server closes prematurely. + // TODO: also do this if we've written the headers but not + // gotten a response yet. + err := cc.readerErr + cc.mu.Lock() + if cc.goAway != nil && isEOFOrNetReadError(err) { + err = GoAwayError{ + LastStreamID: cc.goAway.LastStreamID, + ErrCode: cc.goAway.ErrCode, + DebugData: cc.goAwayDebug, + } + } else if err == io.EOF { + err = io.ErrUnexpectedEOF + } + cc.closed = true + + // If the connection has never been used, and has been open for only a short time, + // leave it in the connection pool for a little while. + // + // This avoids a situation where new connections are constantly created, + // added to the pool, fail, and are removed from the pool, without any error + // being surfaced to the user. + unusedWaitTime := 5 * time.Second + if cc.idleTimeout > 0 && unusedWaitTime > cc.idleTimeout { + unusedWaitTime = cc.idleTimeout + } + idleTime := time.Now().Sub(cc.lastActive) + if atomic.LoadUint32(&cc.atomicReused) == 0 && idleTime < unusedWaitTime && !cc.closedOnIdle { + cc.idleTimer = time.AfterFunc(unusedWaitTime-idleTime, func() { + cc.t.connPool().MarkDead(cc) + }) + } else { + cc.mu.Unlock() // avoid any deadlocks in MarkDead + cc.t.connPool().MarkDead(cc) + cc.mu.Lock() + } + + for _, cs := range cc.streams { + select { + case <-cs.peerClosed: + // The server closed the stream before closing the conn, + // so no need to interrupt it. + default: + cs.abortStreamLocked(err) + } + } + cc.cond.Broadcast() + cc.mu.Unlock() + + if !cc.seenSettings { + // If we have a pending request that wants extended CONNECT, + // let it continue and fail with the connection error. + cc.extendedConnectAllowed = true + close(cc.seenSettingsChan) + } +} + +// countReadFrameError calls Transport.CountError with a string +// representing err. +func (cc *ClientConn) countReadFrameError(err error) { + f := cc.t.CountError + if f == nil || err == nil { + return + } + if ce, ok := err.(ConnectionError); ok { + errCode := ErrCode(ce) + f(fmt.Sprintf("read_frame_conn_error_%s", errCode.stringToken())) + return + } + if errors.Is(err, io.EOF) { + f("read_frame_eof") + return + } + if errors.Is(err, io.ErrUnexpectedEOF) { + f("read_frame_unexpected_eof") + return + } + if errors.Is(err, ErrFrameTooLarge) { + f("read_frame_too_large") + return + } + f("read_frame_other") +} + +func (rl *clientConnReadLoop) run() error { + cc := rl.cc + gotSettings := false + readIdleTimeout := cc.readIdleTimeout + var t *time.Timer + if readIdleTimeout != 0 { + t = time.AfterFunc(readIdleTimeout, cc.healthCheck) + } + for { + f, err := cc.fr.ReadFrame() + if t != nil { + t.Reset(readIdleTimeout) + } + if err != nil { + cc.vlogf("http2: Transport readFrame error on conn %p: (%T) %v", cc, err, err) + } + if se, ok := err.(StreamError); ok { + if cs := rl.streamByID(se.StreamID, notHeaderOrDataFrame); cs != nil { + if se.Cause == nil { + se.Cause = cc.fr.errDetail + } + rl.endStreamError(cs, se) + } + continue + } else if err != nil { + cc.countReadFrameError(err) + return err + } + if VerboseLogs { + cc.vlogf("http2: Transport received %s", summarizeFrame(f)) + } + if !gotSettings { + if _, ok := f.(*SettingsFrame); !ok { + cc.logf("protocol error: received %T before a SETTINGS frame", f) + return ConnectionError(ErrCodeProtocol) + } + gotSettings = true + } + + switch f := f.(type) { + case *MetaHeadersFrame: + err = rl.processHeaders(f) + case *DataFrame: + err = rl.processData(f) + case *GoAwayFrame: + err = rl.processGoAway(f) + case *RSTStreamFrame: + err = rl.processResetStream(f) + case *SettingsFrame: + err = rl.processSettings(f) + case *PushPromiseFrame: + err = rl.processPushPromise(f) + case *WindowUpdateFrame: + err = rl.processWindowUpdate(f) + case *PingFrame: + err = rl.processPing(f) + default: + cc.logf("Transport: unhandled response frame type %T", f) + } + if err != nil { + if VerboseLogs { + cc.vlogf("http2: Transport conn %p received error from processing frame %v: %v", cc, summarizeFrame(f), err) + } + return err + } + } +} + +func (rl *clientConnReadLoop) processHeaders(f *MetaHeadersFrame) error { + cs := rl.streamByID(f.StreamID, headerOrDataFrame) + if cs == nil { + // We'd get here if we canceled a request while the + // server had its response still in flight. So if this + // was just something we canceled, ignore it. + return nil + } + if cs.readClosed { + rl.endStreamError(cs, StreamError{ + StreamID: f.StreamID, + Code: ErrCodeProtocol, + Cause: errors.New("protocol error: headers after END_STREAM"), + }) + return nil + } + if !cs.firstByte { + if cs.trace != nil { + // TODO(bradfitz): move first response byte earlier, + // when we first read the 9 byte header, not waiting + // until all the HEADERS+CONTINUATION frames have been + // merged. This works for now. + traceFirstResponseByte(cs.trace) + } + cs.firstByte = true + } + if !cs.pastHeaders { + cs.pastHeaders = true + } else { + return rl.processTrailers(cs, f) + } + + res, err := rl.handleResponse(cs, f) + if err != nil { + if _, ok := err.(ConnectionError); ok { + return err + } + // Any other error type is a stream error. + rl.endStreamError(cs, StreamError{ + StreamID: f.StreamID, + Code: ErrCodeProtocol, + Cause: err, + }) + return nil // return nil from process* funcs to keep conn alive + } + if res == nil { + // (nil, nil) special case. See handleResponse docs. + return nil + } + cs.resTrailer = &res.Trailer + cs.res = res + close(cs.respHeaderRecv) + if f.StreamEnded() { + rl.endStream(cs) + } + return nil +} + +// may return error types nil, or ConnectionError. Any other error value +// is a StreamError of type ErrCodeProtocol. The returned error in that case +// is the detail. +// +// As a special case, handleResponse may return (nil, nil) to skip the +// frame (currently only used for 1xx responses). +func (rl *clientConnReadLoop) handleResponse(cs *clientStream, f *MetaHeadersFrame) (*http.Response, error) { + if f.Truncated { + return nil, errResponseHeaderListSize + } + + status := f.PseudoValue("status") + if status == "" { + return nil, errors.New("malformed response from server: missing status pseudo header") + } + statusCode, err := strconv.Atoi(status) + if err != nil { + return nil, errors.New("malformed response from server: malformed non-numeric status pseudo header") + } + + regularFields := f.RegularFields() + strs := make([]string, len(regularFields)) + header := make(http.Header, len(regularFields)) + res := &http.Response{ + Proto: "HTTP/2.0", + ProtoMajor: 2, + Header: header, + StatusCode: statusCode, + Status: status + " " + http.StatusText(statusCode), + } + for _, hf := range regularFields { + key := httpcommon.CanonicalHeader(hf.Name) + if key == "Trailer" { + t := res.Trailer + if t == nil { + t = make(http.Header) + res.Trailer = t + } + foreachHeaderElement(hf.Value, func(v string) { + t[httpcommon.CanonicalHeader(v)] = nil + }) + } else { + vv := header[key] + if vv == nil && len(strs) > 0 { + // More than likely this will be a single-element key. + // Most headers aren't multi-valued. + // Set the capacity on strs[0] to 1, so any future append + // won't extend the slice into the other strings. + vv, strs = strs[:1:1], strs[1:] + vv[0] = hf.Value + header[key] = vv + } else { + header[key] = append(vv, hf.Value) + } + } + } + + if statusCode >= 100 && statusCode <= 199 { + if f.StreamEnded() { + return nil, errors.New("1xx informational response with END_STREAM flag") + } + if fn := cs.get1xxTraceFunc(); fn != nil { + // If the 1xx response is being delivered to the user, + // then they're responsible for limiting the number + // of responses. + if err := fn(statusCode, textproto.MIMEHeader(header)); err != nil { + return nil, err + } + } else { + // If the user didn't examine the 1xx response, then we + // limit the size of all 1xx headers. + // + // This differs a bit from the HTTP/1 implementation, which + // limits the size of all 1xx headers plus the final response. + // Use the larger limit of MaxHeaderListSize and + // net/http.Transport.MaxResponseHeaderBytes. + limit := int64(cs.cc.t.maxHeaderListSize()) + if t1 := cs.cc.t.t1; t1 != nil && t1.MaxResponseHeaderBytes > limit { + limit = t1.MaxResponseHeaderBytes + } + for _, h := range f.Fields { + cs.totalHeaderSize += int64(h.Size()) + } + if cs.totalHeaderSize > limit { + if VerboseLogs { + log.Printf("http2: 1xx informational responses too large") + } + return nil, errors.New("header list too large") + } + } + if statusCode == 100 { + traceGot100Continue(cs.trace) + select { + case cs.on100 <- struct{}{}: + default: + } + } + cs.pastHeaders = false // do it all again + return nil, nil + } + + res.ContentLength = -1 + if clens := res.Header["Content-Length"]; len(clens) == 1 { + if cl, err := strconv.ParseUint(clens[0], 10, 63); err == nil { + res.ContentLength = int64(cl) + } else { + // TODO: care? unlike http/1, it won't mess up our framing, so it's + // more safe smuggling-wise to ignore. + } + } else if len(clens) > 1 { + // TODO: care? unlike http/1, it won't mess up our framing, so it's + // more safe smuggling-wise to ignore. + } else if f.StreamEnded() && !cs.isHead { + res.ContentLength = 0 + } + + if cs.isHead { + res.Body = noBody + return res, nil + } + + if f.StreamEnded() { + if res.ContentLength > 0 { + res.Body = missingBody{} + } else { + res.Body = noBody + } + return res, nil + } + + cs.bufPipe.setBuffer(&dataBuffer{expected: res.ContentLength}) + cs.bytesRemain = res.ContentLength + res.Body = transportResponseBody{cs} + + if cs.requestedGzip && asciiEqualFold(res.Header.Get("Content-Encoding"), "gzip") { + res.Header.Del("Content-Encoding") + res.Header.Del("Content-Length") + res.ContentLength = -1 + res.Body = &gzipReader{body: res.Body} + res.Uncompressed = true + } + return res, nil +} + +func (rl *clientConnReadLoop) processTrailers(cs *clientStream, f *MetaHeadersFrame) error { + if cs.pastTrailers { + // Too many HEADERS frames for this stream. + return ConnectionError(ErrCodeProtocol) + } + cs.pastTrailers = true + if !f.StreamEnded() { + // We expect that any headers for trailers also + // has END_STREAM. + return ConnectionError(ErrCodeProtocol) + } + if len(f.PseudoFields()) > 0 { + // No pseudo header fields are defined for trailers. + // TODO: ConnectionError might be overly harsh? Check. + return ConnectionError(ErrCodeProtocol) + } + + trailer := make(http.Header) + for _, hf := range f.RegularFields() { + key := httpcommon.CanonicalHeader(hf.Name) + trailer[key] = append(trailer[key], hf.Value) + } + cs.trailer = trailer + + rl.endStream(cs) + return nil +} + +// transportResponseBody is the concrete type of Transport.RoundTrip's +// Response.Body. It is an io.ReadCloser. +type transportResponseBody struct { + cs *clientStream +} + +func (b transportResponseBody) Read(p []byte) (n int, err error) { + cs := b.cs + cc := cs.cc + + if cs.readErr != nil { + return 0, cs.readErr + } + n, err = b.cs.bufPipe.Read(p) + if cs.bytesRemain != -1 { + if int64(n) > cs.bytesRemain { + n = int(cs.bytesRemain) + if err == nil { + err = errors.New("net/http: server replied with more than declared Content-Length; truncated") + cs.abortStream(err) + } + cs.readErr = err + return int(cs.bytesRemain), err + } + cs.bytesRemain -= int64(n) + if err == io.EOF && cs.bytesRemain > 0 { + err = io.ErrUnexpectedEOF + cs.readErr = err + return n, err + } + } + if n == 0 { + // No flow control tokens to send back. + return + } + + cc.mu.Lock() + connAdd := cc.inflow.add(n) + var streamAdd int32 + if err == nil { // No need to refresh if the stream is over or failed. + streamAdd = cs.inflow.add(n) + } + cc.mu.Unlock() + + if connAdd != 0 || streamAdd != 0 { + cc.wmu.Lock() + defer cc.wmu.Unlock() + if connAdd != 0 { + cc.fr.WriteWindowUpdate(0, mustUint31(connAdd)) + } + if streamAdd != 0 { + cc.fr.WriteWindowUpdate(cs.ID, mustUint31(streamAdd)) + } + cc.bw.Flush() + } + return +} + +var errClosedResponseBody = errors.New("http2: response body closed") + +func (b transportResponseBody) Close() error { + cs := b.cs + cc := cs.cc + + cs.bufPipe.BreakWithError(errClosedResponseBody) + cs.abortStream(errClosedResponseBody) + + unread := cs.bufPipe.Len() + if unread > 0 { + cc.mu.Lock() + // Return connection-level flow control. + connAdd := cc.inflow.add(unread) + cc.mu.Unlock() + + // TODO(dneil): Acquiring this mutex can block indefinitely. + // Move flow control return to a goroutine? + cc.wmu.Lock() + // Return connection-level flow control. + if connAdd > 0 { + cc.fr.WriteWindowUpdate(0, uint32(connAdd)) + } + cc.bw.Flush() + cc.wmu.Unlock() + } + + select { + case <-cs.donec: + case <-cs.ctx.Done(): + // See golang/go#49366: The net/http package can cancel the + // request context after the response body is fully read. + // Don't treat this as an error. + return nil + case <-cs.reqCancel: + return errRequestCanceled + } + return nil +} + +func (rl *clientConnReadLoop) processData(f *DataFrame) error { + cc := rl.cc + cs := rl.streamByID(f.StreamID, headerOrDataFrame) + data := f.Data() + if cs == nil { + cc.mu.Lock() + neverSent := cc.nextStreamID + cc.mu.Unlock() + if f.StreamID >= neverSent { + // We never asked for this. + cc.logf("http2: Transport received unsolicited DATA frame; closing connection") + return ConnectionError(ErrCodeProtocol) + } + // We probably did ask for this, but canceled. Just ignore it. + // TODO: be stricter here? only silently ignore things which + // we canceled, but not things which were closed normally + // by the peer? Tough without accumulating too much state. + + // But at least return their flow control: + if f.Length > 0 { + cc.mu.Lock() + ok := cc.inflow.take(f.Length) + connAdd := cc.inflow.add(int(f.Length)) + cc.mu.Unlock() + if !ok { + return ConnectionError(ErrCodeFlowControl) + } + if connAdd > 0 { + cc.wmu.Lock() + cc.fr.WriteWindowUpdate(0, uint32(connAdd)) + cc.bw.Flush() + cc.wmu.Unlock() + } + } + return nil + } + if cs.readClosed { + cc.logf("protocol error: received DATA after END_STREAM") + rl.endStreamError(cs, StreamError{ + StreamID: f.StreamID, + Code: ErrCodeProtocol, + }) + return nil + } + if !cs.pastHeaders { + cc.logf("protocol error: received DATA before a HEADERS frame") + rl.endStreamError(cs, StreamError{ + StreamID: f.StreamID, + Code: ErrCodeProtocol, + }) + return nil + } + if f.Length > 0 { + if cs.isHead && len(data) > 0 { + cc.logf("protocol error: received DATA on a HEAD request") + rl.endStreamError(cs, StreamError{ + StreamID: f.StreamID, + Code: ErrCodeProtocol, + }) + return nil + } + // Check connection-level flow control. + cc.mu.Lock() + if !takeInflows(&cc.inflow, &cs.inflow, f.Length) { + cc.mu.Unlock() + return ConnectionError(ErrCodeFlowControl) + } + // Return any padded flow control now, since we won't + // refund it later on body reads. + var refund int + if pad := int(f.Length) - len(data); pad > 0 { + refund += pad + } + + didReset := false + var err error + if len(data) > 0 { + if _, err = cs.bufPipe.Write(data); err != nil { + // Return len(data) now if the stream is already closed, + // since data will never be read. + didReset = true + refund += len(data) + } + } + + sendConn := cc.inflow.add(refund) + var sendStream int32 + if !didReset { + sendStream = cs.inflow.add(refund) + } + cc.mu.Unlock() + + if sendConn > 0 || sendStream > 0 { + cc.wmu.Lock() + if sendConn > 0 { + cc.fr.WriteWindowUpdate(0, uint32(sendConn)) + } + if sendStream > 0 { + cc.fr.WriteWindowUpdate(cs.ID, uint32(sendStream)) + } + cc.bw.Flush() + cc.wmu.Unlock() + } + + if err != nil { + rl.endStreamError(cs, err) + return nil + } + } + + if f.StreamEnded() { + rl.endStream(cs) + } + return nil +} + +func (rl *clientConnReadLoop) endStream(cs *clientStream) { + // TODO: check that any declared content-length matches, like + // server.go's (*stream).endStream method. + if !cs.readClosed { + cs.readClosed = true + // Close cs.bufPipe and cs.peerClosed with cc.mu held to avoid a + // race condition: The caller can read io.EOF from Response.Body + // and close the body before we close cs.peerClosed, causing + // cleanupWriteRequest to send a RST_STREAM. + rl.cc.mu.Lock() + defer rl.cc.mu.Unlock() + cs.bufPipe.closeWithErrorAndCode(io.EOF, cs.copyTrailers) + close(cs.peerClosed) + } +} + +func (rl *clientConnReadLoop) endStreamError(cs *clientStream, err error) { + cs.readAborted = true + cs.abortStream(err) +} + +// Constants passed to streamByID for documentation purposes. +const ( + headerOrDataFrame = true + notHeaderOrDataFrame = false +) + +// streamByID returns the stream with the given id, or nil if no stream has that id. +// If headerOrData is true, it clears rst.StreamPingsBlocked. +func (rl *clientConnReadLoop) streamByID(id uint32, headerOrData bool) *clientStream { + rl.cc.mu.Lock() + defer rl.cc.mu.Unlock() + if headerOrData { + // Work around an unfortunate gRPC behavior. + // See comment on ClientConn.rstStreamPingsBlocked for details. + rl.cc.rstStreamPingsBlocked = false + } + cs := rl.cc.streams[id] + if cs != nil && !cs.readAborted { + return cs + } + return nil +} + +func (cs *clientStream) copyTrailers() { + for k, vv := range cs.trailer { + t := cs.resTrailer + if *t == nil { + *t = make(http.Header) + } + (*t)[k] = vv + } +} + +func (rl *clientConnReadLoop) processGoAway(f *GoAwayFrame) error { + cc := rl.cc + cc.t.connPool().MarkDead(cc) + if f.ErrCode != 0 { + // TODO: deal with GOAWAY more. particularly the error code + cc.vlogf("transport got GOAWAY with error code = %v", f.ErrCode) + if fn := cc.t.CountError; fn != nil { + fn("recv_goaway_" + f.ErrCode.stringToken()) + } + } + cc.setGoAway(f) + return nil +} + +func (rl *clientConnReadLoop) processSettings(f *SettingsFrame) error { + cc := rl.cc + // Locking both mu and wmu here allows frame encoding to read settings with only wmu held. + // Acquiring wmu when f.IsAck() is unnecessary, but convenient and mostly harmless. + cc.wmu.Lock() + defer cc.wmu.Unlock() + + if err := rl.processSettingsNoWrite(f); err != nil { + return err + } + if !f.IsAck() { + cc.fr.WriteSettingsAck() + cc.bw.Flush() + } + return nil +} + +func (rl *clientConnReadLoop) processSettingsNoWrite(f *SettingsFrame) error { + cc := rl.cc + cc.mu.Lock() + defer cc.mu.Unlock() + + if f.IsAck() { + if cc.wantSettingsAck { + cc.wantSettingsAck = false + return nil + } + return ConnectionError(ErrCodeProtocol) + } + + var seenMaxConcurrentStreams bool + err := f.ForeachSetting(func(s Setting) error { + switch s.ID { + case SettingMaxFrameSize: + cc.maxFrameSize = s.Val + case SettingMaxConcurrentStreams: + cc.maxConcurrentStreams = s.Val + seenMaxConcurrentStreams = true + case SettingMaxHeaderListSize: + cc.peerMaxHeaderListSize = uint64(s.Val) + case SettingInitialWindowSize: + // Values above the maximum flow-control + // window size of 2^31-1 MUST be treated as a + // connection error (Section 5.4.1) of type + // FLOW_CONTROL_ERROR. + if s.Val > math.MaxInt32 { + return ConnectionError(ErrCodeFlowControl) + } + + // Adjust flow control of currently-open + // frames by the difference of the old initial + // window size and this one. + delta := int32(s.Val) - int32(cc.initialWindowSize) + for _, cs := range cc.streams { + cs.flow.add(delta) + } + cc.cond.Broadcast() + + cc.initialWindowSize = s.Val + case SettingHeaderTableSize: + cc.henc.SetMaxDynamicTableSize(s.Val) + cc.peerMaxHeaderTableSize = s.Val + case SettingEnableConnectProtocol: + if err := s.Valid(); err != nil { + return err + } + // If the peer wants to send us SETTINGS_ENABLE_CONNECT_PROTOCOL, + // we require that it do so in the first SETTINGS frame. + // + // When we attempt to use extended CONNECT, we wait for the first + // SETTINGS frame to see if the server supports it. If we let the + // server enable the feature with a later SETTINGS frame, then + // users will see inconsistent results depending on whether we've + // seen that frame or not. + if !cc.seenSettings { + cc.extendedConnectAllowed = s.Val == 1 + } + default: + cc.vlogf("Unhandled Setting: %v", s) + } + return nil + }) + if err != nil { + return err + } + + if !cc.seenSettings { + if !seenMaxConcurrentStreams { + // This was the servers initial SETTINGS frame and it + // didn't contain a MAX_CONCURRENT_STREAMS field so + // increase the number of concurrent streams this + // connection can establish to our default. + cc.maxConcurrentStreams = defaultMaxConcurrentStreams + } + close(cc.seenSettingsChan) + cc.seenSettings = true + } + + return nil +} + +func (rl *clientConnReadLoop) processWindowUpdate(f *WindowUpdateFrame) error { + cc := rl.cc + cs := rl.streamByID(f.StreamID, notHeaderOrDataFrame) + if f.StreamID != 0 && cs == nil { + return nil + } + + cc.mu.Lock() + defer cc.mu.Unlock() + + fl := &cc.flow + if cs != nil { + fl = &cs.flow + } + if !fl.add(int32(f.Increment)) { + // For stream, the sender sends RST_STREAM with an error code of FLOW_CONTROL_ERROR + if cs != nil { + rl.endStreamError(cs, StreamError{ + StreamID: f.StreamID, + Code: ErrCodeFlowControl, + }) + return nil + } + + return ConnectionError(ErrCodeFlowControl) + } + cc.cond.Broadcast() + return nil +} + +func (rl *clientConnReadLoop) processResetStream(f *RSTStreamFrame) error { + cs := rl.streamByID(f.StreamID, notHeaderOrDataFrame) + if cs == nil { + // TODO: return error if server tries to RST_STREAM an idle stream + return nil + } + serr := streamError(cs.ID, f.ErrCode) + serr.Cause = errFromPeer + if f.ErrCode == ErrCodeProtocol { + rl.cc.SetDoNotReuse() + } + if fn := cs.cc.t.CountError; fn != nil { + fn("recv_rststream_" + f.ErrCode.stringToken()) + } + cs.abortStream(serr) + + cs.bufPipe.CloseWithError(serr) + return nil +} + +// Ping sends a PING frame to the server and waits for the ack. +func (cc *ClientConn) Ping(ctx context.Context) error { + c := make(chan struct{}) + // Generate a random payload + var p [8]byte + for { + if _, err := rand.Read(p[:]); err != nil { + return err + } + cc.mu.Lock() + // check for dup before insert + if _, found := cc.pings[p]; !found { + cc.pings[p] = c + cc.mu.Unlock() + break + } + cc.mu.Unlock() + } + var pingError error + errc := make(chan struct{}) + go func() { + cc.wmu.Lock() + defer cc.wmu.Unlock() + if pingError = cc.fr.WritePing(false, p); pingError != nil { + close(errc) + return + } + if pingError = cc.bw.Flush(); pingError != nil { + close(errc) + return + } + }() + select { + case <-c: + return nil + case <-errc: + return pingError + case <-ctx.Done(): + return ctx.Err() + case <-cc.readerDone: + // connection closed + return cc.readerErr + } +} + +func (rl *clientConnReadLoop) processPing(f *PingFrame) error { + if f.IsAck() { + cc := rl.cc + cc.mu.Lock() + defer cc.mu.Unlock() + // If ack, notify listener if any + if c, ok := cc.pings[f.Data]; ok { + close(c) + delete(cc.pings, f.Data) + } + if cc.pendingResets > 0 { + // See clientStream.cleanupWriteRequest. + cc.pendingResets = 0 + cc.rstStreamPingsBlocked = true + cc.cond.Broadcast() + } + return nil + } + cc := rl.cc + cc.wmu.Lock() + defer cc.wmu.Unlock() + if err := cc.fr.WritePing(true, f.Data); err != nil { + return err + } + return cc.bw.Flush() +} + +func (rl *clientConnReadLoop) processPushPromise(f *PushPromiseFrame) error { + // We told the peer we don't want them. + // Spec says: + // "PUSH_PROMISE MUST NOT be sent if the SETTINGS_ENABLE_PUSH + // setting of the peer endpoint is set to 0. An endpoint that + // has set this setting and has received acknowledgement MUST + // treat the receipt of a PUSH_PROMISE frame as a connection + // error (Section 5.4.1) of type PROTOCOL_ERROR." + return ConnectionError(ErrCodeProtocol) +} + +// writeStreamReset sends a RST_STREAM frame. +// When ping is true, it also sends a PING frame with a random payload. +func (cc *ClientConn) writeStreamReset(streamID uint32, code ErrCode, ping bool, err error) { + // TODO: map err to more interesting error codes, once the + // HTTP community comes up with some. But currently for + // RST_STREAM there's no equivalent to GOAWAY frame's debug + // data, and the error codes are all pretty vague ("cancel"). + cc.wmu.Lock() + cc.fr.WriteRSTStream(streamID, code) + if ping { + var payload [8]byte + rand.Read(payload[:]) + cc.fr.WritePing(false, payload) + } + cc.bw.Flush() + cc.wmu.Unlock() +} + +var ( + errResponseHeaderListSize = errors.New("http2: response header list larger than advertised limit") + errRequestHeaderListSize = httpcommon.ErrRequestHeaderListSize +) + +func (cc *ClientConn) logf(format string, args ...interface{}) { + cc.t.logf(format, args...) +} + +func (cc *ClientConn) vlogf(format string, args ...interface{}) { + cc.t.vlogf(format, args...) +} + +func (t *Transport) vlogf(format string, args ...interface{}) { + if VerboseLogs { + t.logf(format, args...) + } +} + +func (t *Transport) logf(format string, args ...interface{}) { + log.Printf(format, args...) +} + +var noBody io.ReadCloser = noBodyReader{} + +type noBodyReader struct{} + +func (noBodyReader) Close() error { return nil } +func (noBodyReader) Read([]byte) (int, error) { return 0, io.EOF } + +type missingBody struct{} + +func (missingBody) Close() error { return nil } +func (missingBody) Read([]byte) (int, error) { return 0, io.ErrUnexpectedEOF } + +func strSliceContains(ss []string, s string) bool { + for _, v := range ss { + if v == s { + return true + } + } + return false +} + +type erringRoundTripper struct{ err error } + +func (rt erringRoundTripper) RoundTripErr() error { return rt.err } +func (rt erringRoundTripper) RoundTrip(*http.Request) (*http.Response, error) { return nil, rt.err } + +// gzipReader wraps a response body so it can lazily +// call gzip.NewReader on the first call to Read +type gzipReader struct { + _ incomparable + body io.ReadCloser // underlying Response.Body + zr *gzip.Reader // lazily-initialized gzip reader + zerr error // sticky error +} + +func (gz *gzipReader) Read(p []byte) (n int, err error) { + if gz.zerr != nil { + return 0, gz.zerr + } + if gz.zr == nil { + gz.zr, err = gzip.NewReader(gz.body) + if err != nil { + gz.zerr = err + return 0, err + } + } + return gz.zr.Read(p) +} + +func (gz *gzipReader) Close() error { + if err := gz.body.Close(); err != nil { + return err + } + gz.zerr = fs.ErrClosed + return nil +} + +type errorReader struct{ err error } + +func (r errorReader) Read(p []byte) (int, error) { return 0, r.err } + +// isConnectionCloseRequest reports whether req should use its own +// connection for a single request and then close the connection. +func isConnectionCloseRequest(req *http.Request) bool { + return req.Close || httpguts.HeaderValuesContainsToken(req.Header["Connection"], "close") +} + +// registerHTTPSProtocol calls Transport.RegisterProtocol but +// converting panics into errors. +func registerHTTPSProtocol(t *http.Transport, rt noDialH2RoundTripper) (err error) { + defer func() { + if e := recover(); e != nil { + err = fmt.Errorf("%v", e) + } + }() + t.RegisterProtocol("https", rt) + return nil +} + +// noDialH2RoundTripper is a RoundTripper which only tries to complete the request +// if there's already has a cached connection to the host. +// (The field is exported so it can be accessed via reflect from net/http; tested +// by TestNoDialH2RoundTripperType) +type noDialH2RoundTripper struct{ *Transport } + +func (rt noDialH2RoundTripper) RoundTrip(req *http.Request) (*http.Response, error) { + res, err := rt.Transport.RoundTrip(req) + if isNoCachedConnError(err) { + return nil, http.ErrSkipAltProtocol + } + return res, err +} + +func (t *Transport) idleConnTimeout() time.Duration { + // to keep things backwards compatible, we use non-zero values of + // IdleConnTimeout, followed by using the IdleConnTimeout on the underlying + // http1 transport, followed by 0 + if t.IdleConnTimeout != 0 { + return t.IdleConnTimeout + } + + if t.t1 != nil { + return t.t1.IdleConnTimeout + } + + return 0 +} + +func traceGetConn(req *http.Request, hostPort string) { + trace := httptrace.ContextClientTrace(req.Context()) + if trace == nil || trace.GetConn == nil { + return + } + trace.GetConn(hostPort) +} + +func traceGotConn(req *http.Request, cc *ClientConn, reused bool) { + trace := httptrace.ContextClientTrace(req.Context()) + if trace == nil || trace.GotConn == nil { + return + } + ci := httptrace.GotConnInfo{Conn: cc.tconn} + ci.Reused = reused + cc.mu.Lock() + ci.WasIdle = len(cc.streams) == 0 && reused + if ci.WasIdle && !cc.lastActive.IsZero() { + ci.IdleTime = time.Since(cc.lastActive) + } + cc.mu.Unlock() + + trace.GotConn(ci) +} + +func traceWroteHeaders(trace *httptrace.ClientTrace) { + if trace != nil && trace.WroteHeaders != nil { + trace.WroteHeaders() + } +} + +func traceGot100Continue(trace *httptrace.ClientTrace) { + if trace != nil && trace.Got100Continue != nil { + trace.Got100Continue() + } +} + +func traceWait100Continue(trace *httptrace.ClientTrace) { + if trace != nil && trace.Wait100Continue != nil { + trace.Wait100Continue() + } +} + +func traceWroteRequest(trace *httptrace.ClientTrace, err error) { + if trace != nil && trace.WroteRequest != nil { + trace.WroteRequest(httptrace.WroteRequestInfo{Err: err}) + } +} + +func traceFirstResponseByte(trace *httptrace.ClientTrace) { + if trace != nil && trace.GotFirstResponseByte != nil { + trace.GotFirstResponseByte() + } +} + +func traceGot1xxResponseFunc(trace *httptrace.ClientTrace) func(int, textproto.MIMEHeader) error { + if trace != nil { + return trace.Got1xxResponse + } + return nil +} + +// dialTLSWithContext uses tls.Dialer, added in Go 1.15, to open a TLS +// connection. +func (t *Transport) dialTLSWithContext(ctx context.Context, network, addr string, cfg *tls.Config) (*tls.Conn, error) { + dialer := &tls.Dialer{ + Config: cfg, + } + cn, err := dialer.DialContext(ctx, network, addr) + if err != nil { + return nil, err + } + tlsCn := cn.(*tls.Conn) // DialContext comment promises this will always succeed + return tlsCn, nil +} diff --git a/backend/vendor/github.com/enetx/http2/unencrypted.go b/backend/vendor/github.com/enetx/http2/unencrypted.go new file mode 100644 index 0000000..b2de211 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/unencrypted.go @@ -0,0 +1,32 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "crypto/tls" + "errors" + "net" +) + +const nextProtoUnencryptedHTTP2 = "unencrypted_http2" + +// unencryptedNetConnFromTLSConn retrieves a net.Conn wrapped in a *tls.Conn. +// +// TLSNextProto functions accept a *tls.Conn. +// +// When passing an unencrypted HTTP/2 connection to a TLSNextProto function, +// we pass a *tls.Conn with an underlying net.Conn containing the unencrypted connection. +// To be extra careful about mistakes (accidentally dropping TLS encryption in a place +// where we want it), the tls.Conn contains a net.Conn with an UnencryptedNetConn method +// that returns the actual connection we want to use. +func unencryptedNetConnFromTLSConn(tc *tls.Conn) (net.Conn, error) { + conner, ok := tc.NetConn().(interface { + UnencryptedNetConn() net.Conn + }) + if !ok { + return nil, errors.New("http2: TLS conn unexpectedly found in unencrypted handoff") + } + return conner.UnencryptedNetConn(), nil +} diff --git a/backend/vendor/github.com/enetx/http2/write.go b/backend/vendor/github.com/enetx/http2/write.go new file mode 100644 index 0000000..b926f7a --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/write.go @@ -0,0 +1,382 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "bytes" + "fmt" + "log" + "net/url" + + "github.com/enetx/http" + + "golang.org/x/net/http/httpguts" + "golang.org/x/net/http2/hpack" + "github.com/enetx/http2/httpcommon" +) + +// writeFramer is implemented by any type that is used to write frames. +type writeFramer interface { + writeFrame(writeContext) error + + // staysWithinBuffer reports whether this writer promises that + // it will only write less than or equal to size bytes, and it + // won't Flush the write context. + staysWithinBuffer(size int) bool +} + +// writeContext is the interface needed by the various frame writer +// types below. All the writeFrame methods below are scheduled via the +// frame writing scheduler (see writeScheduler in writesched.go). +// +// This interface is implemented by *serverConn. +// +// TODO: decide whether to a) use this in the client code (which didn't +// end up using this yet, because it has a simpler design, not +// currently implementing priorities), or b) delete this and +// make the server code a bit more concrete. +type writeContext interface { + Framer() *Framer + Flush() error + CloseConn() error + // HeaderEncoder returns an HPACK encoder that writes to the + // returned buffer. + HeaderEncoder() (*hpack.Encoder, *bytes.Buffer) +} + +// writeEndsStream reports whether w writes a frame that will transition +// the stream to a half-closed local state. This returns false for RST_STREAM, +// which closes the entire stream (not just the local half). +func writeEndsStream(w writeFramer) bool { + switch v := w.(type) { + case *writeData: + return v.endStream + case *writeResHeaders: + return v.endStream + case nil: + // This can only happen if the caller reuses w after it's + // been intentionally nil'ed out to prevent use. Keep this + // here to catch future refactoring breaking it. + panic("writeEndsStream called on nil writeFramer") + } + return false +} + +type flushFrameWriter struct{} + +func (flushFrameWriter) writeFrame(ctx writeContext) error { + return ctx.Flush() +} + +func (flushFrameWriter) staysWithinBuffer(max int) bool { return false } + +type writeSettings []Setting + +func (s writeSettings) staysWithinBuffer(max int) bool { + const settingSize = 6 // uint16 + uint32 + return frameHeaderLen+settingSize*len(s) <= max + +} + +func (s writeSettings) writeFrame(ctx writeContext) error { + return ctx.Framer().WriteSettings([]Setting(s)...) +} + +type writeGoAway struct { + maxStreamID uint32 + code ErrCode +} + +func (p *writeGoAway) writeFrame(ctx writeContext) error { + err := ctx.Framer().WriteGoAway(p.maxStreamID, p.code, nil) + ctx.Flush() // ignore error: we're hanging up on them anyway + return err +} + +func (*writeGoAway) staysWithinBuffer(max int) bool { return false } // flushes + +type writeData struct { + streamID uint32 + p []byte + endStream bool +} + +func (w *writeData) String() string { + return fmt.Sprintf("writeData(stream=%d, p=%d, endStream=%v)", w.streamID, len(w.p), w.endStream) +} + +func (w *writeData) writeFrame(ctx writeContext) error { + return ctx.Framer().WriteData(w.streamID, w.endStream, w.p) +} + +func (w *writeData) staysWithinBuffer(max int) bool { + return frameHeaderLen+len(w.p) <= max +} + +// handlerPanicRST is the message sent from handler goroutines when +// the handler panics. +type handlerPanicRST struct { + StreamID uint32 +} + +func (hp handlerPanicRST) writeFrame(ctx writeContext) error { + return ctx.Framer().WriteRSTStream(hp.StreamID, ErrCodeInternal) +} + +func (hp handlerPanicRST) staysWithinBuffer(max int) bool { return frameHeaderLen+4 <= max } + +func (se StreamError) writeFrame(ctx writeContext) error { + return ctx.Framer().WriteRSTStream(se.StreamID, se.Code) +} + +func (se StreamError) staysWithinBuffer(max int) bool { return frameHeaderLen+4 <= max } + +type writePing struct { + data [8]byte +} + +func (w writePing) writeFrame(ctx writeContext) error { + return ctx.Framer().WritePing(false, w.data) +} + +func (w writePing) staysWithinBuffer(max int) bool { return frameHeaderLen+len(w.data) <= max } + +type writePingAck struct{ pf *PingFrame } + +func (w writePingAck) writeFrame(ctx writeContext) error { + return ctx.Framer().WritePing(true, w.pf.Data) +} + +func (w writePingAck) staysWithinBuffer(max int) bool { return frameHeaderLen+len(w.pf.Data) <= max } + +type writeSettingsAck struct{} + +func (writeSettingsAck) writeFrame(ctx writeContext) error { + return ctx.Framer().WriteSettingsAck() +} + +func (writeSettingsAck) staysWithinBuffer(max int) bool { return frameHeaderLen <= max } + +// splitHeaderBlock splits headerBlock into fragments so that each fragment fits +// in a single frame, then calls fn for each fragment. firstFrag/lastFrag are true +// for the first/last fragment, respectively. +func splitHeaderBlock(ctx writeContext, headerBlock []byte, fn func(ctx writeContext, frag []byte, firstFrag, lastFrag bool) error) error { + // For now we're lazy and just pick the minimum MAX_FRAME_SIZE + // that all peers must support (16KB). Later we could care + // more and send larger frames if the peer advertised it, but + // there's little point. Most headers are small anyway (so we + // generally won't have CONTINUATION frames), and extra frames + // only waste 9 bytes anyway. + const maxFrameSize = 16384 + + first := true + for len(headerBlock) > 0 { + frag := headerBlock + if len(frag) > maxFrameSize { + frag = frag[:maxFrameSize] + } + headerBlock = headerBlock[len(frag):] + if err := fn(ctx, frag, first, len(headerBlock) == 0); err != nil { + return err + } + first = false + } + return nil +} + +// writeResHeaders is a request to write a HEADERS and 0+ CONTINUATION frames +// for HTTP response headers or trailers from a server handler. +type writeResHeaders struct { + streamID uint32 + httpResCode int // 0 means no ":status" line + h http.Header // may be nil + trailers []string // if non-nil, which keys of h to write. nil means all. + endStream bool + + date string + contentType string + contentLength string +} + +func encKV(enc *hpack.Encoder, k, v string) { + if VerboseLogs { + log.Printf("http2: server encoding header %q = %q", k, v) + } + enc.WriteField(hpack.HeaderField{Name: k, Value: v}) +} + +func (w *writeResHeaders) staysWithinBuffer(max int) bool { + // TODO: this is a common one. It'd be nice to return true + // here and get into the fast path if we could be clever and + // calculate the size fast enough, or at least a conservative + // upper bound that usually fires. (Maybe if w.h and + // w.trailers are nil, so we don't need to enumerate it.) + // Otherwise I'm afraid that just calculating the length to + // answer this question would be slower than the ~2µs benefit. + return false +} + +func (w *writeResHeaders) writeFrame(ctx writeContext) error { + enc, buf := ctx.HeaderEncoder() + buf.Reset() + + if w.httpResCode != 0 { + encKV(enc, ":status", httpCodeString(w.httpResCode)) + } + + encodeHeaders(enc, w.h, w.trailers) + + if w.contentType != "" { + encKV(enc, "content-type", w.contentType) + } + if w.contentLength != "" { + encKV(enc, "content-length", w.contentLength) + } + if w.date != "" { + encKV(enc, "date", w.date) + } + + headerBlock := buf.Bytes() + if len(headerBlock) == 0 && w.trailers == nil { + panic("unexpected empty hpack") + } + + return splitHeaderBlock(ctx, headerBlock, w.writeHeaderBlock) +} + +func (w *writeResHeaders) writeHeaderBlock(ctx writeContext, frag []byte, firstFrag, lastFrag bool) error { + if firstFrag { + return ctx.Framer().WriteHeaders(HeadersFrameParam{ + StreamID: w.streamID, + BlockFragment: frag, + EndStream: w.endStream, + EndHeaders: lastFrag, + }) + } else { + return ctx.Framer().WriteContinuation(w.streamID, lastFrag, frag) + } +} + +// writePushPromise is a request to write a PUSH_PROMISE and 0+ CONTINUATION frames. +type writePushPromise struct { + streamID uint32 // pusher stream + method string // for :method + url *url.URL // for :scheme, :authority, :path + h http.Header + + // Creates an ID for a pushed stream. This runs on serveG just before + // the frame is written. The returned ID is copied to promisedID. + allocatePromisedID func() (uint32, error) + promisedID uint32 +} + +func (w *writePushPromise) staysWithinBuffer(max int) bool { + // TODO: see writeResHeaders.staysWithinBuffer + return false +} + +func (w *writePushPromise) writeFrame(ctx writeContext) error { + enc, buf := ctx.HeaderEncoder() + buf.Reset() + + encKV(enc, ":method", w.method) + encKV(enc, ":scheme", w.url.Scheme) + encKV(enc, ":authority", w.url.Host) + encKV(enc, ":path", w.url.RequestURI()) + encodeHeaders(enc, w.h, nil) + + headerBlock := buf.Bytes() + if len(headerBlock) == 0 { + panic("unexpected empty hpack") + } + + return splitHeaderBlock(ctx, headerBlock, w.writeHeaderBlock) +} + +func (w *writePushPromise) writeHeaderBlock(ctx writeContext, frag []byte, firstFrag, lastFrag bool) error { + if firstFrag { + return ctx.Framer().WritePushPromise(PushPromiseParam{ + StreamID: w.streamID, + PromiseID: w.promisedID, + BlockFragment: frag, + EndHeaders: lastFrag, + }) + } else { + return ctx.Framer().WriteContinuation(w.streamID, lastFrag, frag) + } +} + +type write100ContinueHeadersFrame struct { + streamID uint32 +} + +func (w write100ContinueHeadersFrame) writeFrame(ctx writeContext) error { + enc, buf := ctx.HeaderEncoder() + buf.Reset() + encKV(enc, ":status", "100") + return ctx.Framer().WriteHeaders(HeadersFrameParam{ + StreamID: w.streamID, + BlockFragment: buf.Bytes(), + EndStream: false, + EndHeaders: true, + }) +} + +func (w write100ContinueHeadersFrame) staysWithinBuffer(max int) bool { + // Sloppy but conservative: + return 9+2*(len(":status")+len("100")) <= max +} + +type writeWindowUpdate struct { + streamID uint32 // or 0 for conn-level + n uint32 +} + +func (wu writeWindowUpdate) staysWithinBuffer(max int) bool { return frameHeaderLen+4 <= max } + +func (wu writeWindowUpdate) writeFrame(ctx writeContext) error { + return ctx.Framer().WriteWindowUpdate(wu.streamID, wu.n) +} + +// encodeHeaders encodes an http.Header. If keys is not nil, then (k, h[k]) +// is encoded only if k is in keys. +func encodeHeaders(enc *hpack.Encoder, h http.Header, keys []string) { + if keys == nil { + sorter := sorterPool.Get().(*sorter) + // Using defer here, since the returned keys from the + // sorter.Keys method is only valid until the sorter + // is returned: + defer sorterPool.Put(sorter) + keys = sorter.Keys(h) + } + for _, k := range keys { + vv := h[k] + k, ascii := httpcommon.LowerHeader(k) + if !ascii { + // Skip writing invalid headers. Per RFC 7540, Section 8.1.2, header + // field names have to be ASCII characters (just as in HTTP/1.x). + continue + } + if !validWireHeaderFieldName(k) { + // Skip it as backup paranoia. Per + // golang.org/issue/14048, these should + // already be rejected at a higher level. + continue + } + isTE := k == "transfer-encoding" + for _, v := range vv { + if !httpguts.ValidHeaderFieldValue(v) { + // TODO: return an error? golang.org/issue/14048 + // For now just omit it. + continue + } + // TODO: more of "8.1.2.2 Connection-Specific Header Fields" + if isTE && v != "trailers" { + continue + } + encKV(enc, k, v) + } + } +} diff --git a/backend/vendor/github.com/enetx/http2/writesched.go b/backend/vendor/github.com/enetx/http2/writesched.go new file mode 100644 index 0000000..4d3890f --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/writesched.go @@ -0,0 +1,253 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import "fmt" + +// WriteScheduler is the interface implemented by HTTP/2 write schedulers. +// Methods are never called concurrently. +type WriteScheduler interface { + // OpenStream opens a new stream in the write scheduler. + // It is illegal to call this with streamID=0 or with a streamID that is + // already open -- the call may panic. + OpenStream(streamID uint32, options OpenStreamOptions) + + // CloseStream closes a stream in the write scheduler. Any frames queued on + // this stream should be discarded. It is illegal to call this on a stream + // that is not open -- the call may panic. + CloseStream(streamID uint32) + + // AdjustStream adjusts the priority of the given stream. This may be called + // on a stream that has not yet been opened or has been closed. Note that + // RFC 7540 allows PRIORITY frames to be sent on streams in any state. See: + // https://tools.ietf.org/html/rfc7540#section-5.1 + AdjustStream(streamID uint32, priority PriorityParam) + + // Push queues a frame in the scheduler. In most cases, this will not be + // called with wr.StreamID()!=0 unless that stream is currently open. The one + // exception is RST_STREAM frames, which may be sent on idle or closed streams. + Push(wr FrameWriteRequest) + + // Pop dequeues the next frame to write. Returns false if no frames can + // be written. Frames with a given wr.StreamID() are Pop'd in the same + // order they are Push'd, except RST_STREAM frames. No frames should be + // discarded except by CloseStream. + Pop() (wr FrameWriteRequest, ok bool) +} + +// OpenStreamOptions specifies extra options for WriteScheduler.OpenStream. +type OpenStreamOptions struct { + // PusherID is zero if the stream was initiated by the client. Otherwise, + // PusherID names the stream that pushed the newly opened stream. + PusherID uint32 + // priority is used to set the priority of the newly opened stream. + priority PriorityParam +} + +// FrameWriteRequest is a request to write a frame. +type FrameWriteRequest struct { + // write is the interface value that does the writing, once the + // WriteScheduler has selected this frame to write. The write + // functions are all defined in write.go. + write writeFramer + + // stream is the stream on which this frame will be written. + // nil for non-stream frames like PING and SETTINGS. + // nil for RST_STREAM streams, which use the StreamError.StreamID field instead. + stream *stream + + // done, if non-nil, must be a buffered channel with space for + // 1 message and is sent the return value from write (or an + // earlier error) when the frame has been written. + done chan error +} + +// StreamID returns the id of the stream this frame will be written to. +// 0 is used for non-stream frames such as PING and SETTINGS. +func (wr FrameWriteRequest) StreamID() uint32 { + if wr.stream == nil { + if se, ok := wr.write.(StreamError); ok { + // (*serverConn).resetStream doesn't set + // stream because it doesn't necessarily have + // one. So special case this type of write + // message. + return se.StreamID + } + return 0 + } + return wr.stream.id +} + +// isControl reports whether wr is a control frame for MaxQueuedControlFrames +// purposes. That includes non-stream frames and RST_STREAM frames. +func (wr FrameWriteRequest) isControl() bool { + return wr.stream == nil +} + +// DataSize returns the number of flow control bytes that must be consumed +// to write this entire frame. This is 0 for non-DATA frames. +func (wr FrameWriteRequest) DataSize() int { + if wd, ok := wr.write.(*writeData); ok { + return len(wd.p) + } + return 0 +} + +// Consume consumes min(n, available) bytes from this frame, where available +// is the number of flow control bytes available on the stream. Consume returns +// 0, 1, or 2 frames, where the integer return value gives the number of frames +// returned. +// +// If flow control prevents consuming any bytes, this returns (_, _, 0). If +// the entire frame was consumed, this returns (wr, _, 1). Otherwise, this +// returns (consumed, rest, 2), where 'consumed' contains the consumed bytes and +// 'rest' contains the remaining bytes. The consumed bytes are deducted from the +// underlying stream's flow control budget. +func (wr FrameWriteRequest) Consume(n int32) (FrameWriteRequest, FrameWriteRequest, int) { + var empty FrameWriteRequest + + // Non-DATA frames are always consumed whole. + wd, ok := wr.write.(*writeData) + if !ok || len(wd.p) == 0 { + return wr, empty, 1 + } + + // Might need to split after applying limits. + allowed := wr.stream.flow.available() + if n < allowed { + allowed = n + } + if wr.stream.sc.maxFrameSize < allowed { + allowed = wr.stream.sc.maxFrameSize + } + if allowed <= 0 { + return empty, empty, 0 + } + if len(wd.p) > int(allowed) { + wr.stream.flow.take(allowed) + consumed := FrameWriteRequest{ + stream: wr.stream, + write: &writeData{ + streamID: wd.streamID, + p: wd.p[:allowed], + // Even if the original had endStream set, there + // are bytes remaining because len(wd.p) > allowed, + // so we know endStream is false. + endStream: false, + }, + // Our caller is blocking on the final DATA frame, not + // this intermediate frame, so no need to wait. + done: nil, + } + rest := FrameWriteRequest{ + stream: wr.stream, + write: &writeData{ + streamID: wd.streamID, + p: wd.p[allowed:], + endStream: wd.endStream, + }, + done: wr.done, + } + return consumed, rest, 2 + } + + // The frame is consumed whole. + // NB: This cast cannot overflow because allowed is <= math.MaxInt32. + wr.stream.flow.take(int32(len(wd.p))) + return wr, empty, 1 +} + +// String is for debugging only. +func (wr FrameWriteRequest) String() string { + var des string + if s, ok := wr.write.(fmt.Stringer); ok { + des = s.String() + } else { + des = fmt.Sprintf("%T", wr.write) + } + return fmt.Sprintf("[FrameWriteRequest stream=%d, ch=%v, writer=%v]", wr.StreamID(), wr.done != nil, des) +} + +// replyToWriter sends err to wr.done and panics if the send must block +// This does nothing if wr.done is nil. +func (wr *FrameWriteRequest) replyToWriter(err error) { + if wr.done == nil { + return + } + select { + case wr.done <- err: + default: + panic(fmt.Sprintf("unbuffered done channel passed in for type %T", wr.write)) + } + wr.write = nil // prevent use (assume it's tainted after wr.done send) +} + +// writeQueue is used by implementations of WriteScheduler. +type writeQueue struct { + s []FrameWriteRequest + prev, next *writeQueue +} + +func (q *writeQueue) empty() bool { return len(q.s) == 0 } + +func (q *writeQueue) push(wr FrameWriteRequest) { + q.s = append(q.s, wr) +} + +func (q *writeQueue) shift() FrameWriteRequest { + if len(q.s) == 0 { + panic("invalid use of queue") + } + wr := q.s[0] + // TODO: less copy-happy queue. + copy(q.s, q.s[1:]) + q.s[len(q.s)-1] = FrameWriteRequest{} + q.s = q.s[:len(q.s)-1] + return wr +} + +// consume consumes up to n bytes from q.s[0]. If the frame is +// entirely consumed, it is removed from the queue. If the frame +// is partially consumed, the frame is kept with the consumed +// bytes removed. Returns true iff any bytes were consumed. +func (q *writeQueue) consume(n int32) (FrameWriteRequest, bool) { + if len(q.s) == 0 { + return FrameWriteRequest{}, false + } + consumed, rest, numresult := q.s[0].Consume(n) + switch numresult { + case 0: + return FrameWriteRequest{}, false + case 1: + q.shift() + case 2: + q.s[0] = rest + } + return consumed, true +} + +type writeQueuePool []*writeQueue + +// put inserts an unused writeQueue into the pool. +func (p *writeQueuePool) put(q *writeQueue) { + for i := range q.s { + q.s[i] = FrameWriteRequest{} + } + q.s = q.s[:0] + *p = append(*p, q) +} + +// get returns an empty writeQueue. +func (p *writeQueuePool) get() *writeQueue { + ln := len(*p) + if ln == 0 { + return new(writeQueue) + } + x := ln - 1 + q := (*p)[x] + (*p)[x] = nil + *p = (*p)[:x] + return q +} diff --git a/backend/vendor/github.com/enetx/http2/writesched_priority_rfc7540.go b/backend/vendor/github.com/enetx/http2/writesched_priority_rfc7540.go new file mode 100644 index 0000000..6d24d6a --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/writesched_priority_rfc7540.go @@ -0,0 +1,451 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "fmt" + "math" + "sort" +) + +// RFC 7540, Section 5.3.5: the default weight is 16. +const priorityDefaultWeightRFC7540 = 15 // 16 = 15 + 1 + +// PriorityWriteSchedulerConfig configures a priorityWriteScheduler. +type PriorityWriteSchedulerConfig struct { + // MaxClosedNodesInTree controls the maximum number of closed streams to + // retain in the priority tree. Setting this to zero saves a small amount + // of memory at the cost of performance. + // + // See RFC 7540, Section 5.3.4: + // "It is possible for a stream to become closed while prioritization + // information ... is in transit. ... This potentially creates suboptimal + // prioritization, since the stream could be given a priority that is + // different from what is intended. To avoid these problems, an endpoint + // SHOULD retain stream prioritization state for a period after streams + // become closed. The longer state is retained, the lower the chance that + // streams are assigned incorrect or default priority values." + MaxClosedNodesInTree int + + // MaxIdleNodesInTree controls the maximum number of idle streams to + // retain in the priority tree. Setting this to zero saves a small amount + // of memory at the cost of performance. + // + // See RFC 7540, Section 5.3.4: + // Similarly, streams that are in the "idle" state can be assigned + // priority or become a parent of other streams. This allows for the + // creation of a grouping node in the dependency tree, which enables + // more flexible expressions of priority. Idle streams begin with a + // default priority (Section 5.3.5). + MaxIdleNodesInTree int + + // ThrottleOutOfOrderWrites enables write throttling to help ensure that + // data is delivered in priority order. This works around a race where + // stream B depends on stream A and both streams are about to call Write + // to queue DATA frames. If B wins the race, a naive scheduler would eagerly + // write as much data from B as possible, but this is suboptimal because A + // is a higher-priority stream. With throttling enabled, we write a small + // amount of data from B to minimize the amount of bandwidth that B can + // steal from A. + ThrottleOutOfOrderWrites bool +} + +// NewPriorityWriteScheduler constructs a WriteScheduler that schedules +// frames by following HTTP/2 priorities as described in RFC 7540 Section 5.3. +// If cfg is nil, default options are used. +func NewPriorityWriteScheduler(cfg *PriorityWriteSchedulerConfig) WriteScheduler { + if cfg == nil { + // For justification of these defaults, see: + // https://docs.google.com/document/d/1oLhNg1skaWD4_DtaoCxdSRN5erEXrH-KnLrMwEpOtFY + cfg = &PriorityWriteSchedulerConfig{ + MaxClosedNodesInTree: 10, + MaxIdleNodesInTree: 10, + ThrottleOutOfOrderWrites: false, + } + } + + ws := &priorityWriteSchedulerRFC7540{ + nodes: make(map[uint32]*priorityNodeRFC7540), + maxClosedNodesInTree: cfg.MaxClosedNodesInTree, + maxIdleNodesInTree: cfg.MaxIdleNodesInTree, + enableWriteThrottle: cfg.ThrottleOutOfOrderWrites, + } + ws.nodes[0] = &ws.root + if cfg.ThrottleOutOfOrderWrites { + ws.writeThrottleLimit = 1024 + } else { + ws.writeThrottleLimit = math.MaxInt32 + } + return ws +} + +type priorityNodeStateRFC7540 int + +const ( + priorityNodeOpenRFC7540 priorityNodeStateRFC7540 = iota + priorityNodeClosedRFC7540 + priorityNodeIdleRFC7540 +) + +// priorityNodeRFC7540 is a node in an HTTP/2 priority tree. +// Each node is associated with a single stream ID. +// See RFC 7540, Section 5.3. +type priorityNodeRFC7540 struct { + q writeQueue // queue of pending frames to write + id uint32 // id of the stream, or 0 for the root of the tree + weight uint8 // the actual weight is weight+1, so the value is in [1,256] + state priorityNodeStateRFC7540 // open | closed | idle + bytes int64 // number of bytes written by this node, or 0 if closed + subtreeBytes int64 // sum(node.bytes) of all nodes in this subtree + + // These links form the priority tree. + parent *priorityNodeRFC7540 + kids *priorityNodeRFC7540 // start of the kids list + prev, next *priorityNodeRFC7540 // doubly-linked list of siblings +} + +func (n *priorityNodeRFC7540) setParent(parent *priorityNodeRFC7540) { + if n == parent { + panic("setParent to self") + } + if n.parent == parent { + return + } + // Unlink from current parent. + if parent := n.parent; parent != nil { + if n.prev == nil { + parent.kids = n.next + } else { + n.prev.next = n.next + } + if n.next != nil { + n.next.prev = n.prev + } + } + // Link to new parent. + // If parent=nil, remove n from the tree. + // Always insert at the head of parent.kids (this is assumed by walkReadyInOrder). + n.parent = parent + if parent == nil { + n.next = nil + n.prev = nil + } else { + n.next = parent.kids + n.prev = nil + if n.next != nil { + n.next.prev = n + } + parent.kids = n + } +} + +func (n *priorityNodeRFC7540) addBytes(b int64) { + n.bytes += b + for ; n != nil; n = n.parent { + n.subtreeBytes += b + } +} + +// walkReadyInOrder iterates over the tree in priority order, calling f for each node +// with a non-empty write queue. When f returns true, this function returns true and the +// walk halts. tmp is used as scratch space for sorting. +// +// f(n, openParent) takes two arguments: the node to visit, n, and a bool that is true +// if any ancestor p of n is still open (ignoring the root node). +func (n *priorityNodeRFC7540) walkReadyInOrder(openParent bool, tmp *[]*priorityNodeRFC7540, f func(*priorityNodeRFC7540, bool) bool) bool { + if !n.q.empty() && f(n, openParent) { + return true + } + if n.kids == nil { + return false + } + + // Don't consider the root "open" when updating openParent since + // we can't send data frames on the root stream (only control frames). + if n.id != 0 { + openParent = openParent || (n.state == priorityNodeOpenRFC7540) + } + + // Common case: only one kid or all kids have the same weight. + // Some clients don't use weights; other clients (like web browsers) + // use mostly-linear priority trees. + w := n.kids.weight + needSort := false + for k := n.kids.next; k != nil; k = k.next { + if k.weight != w { + needSort = true + break + } + } + if !needSort { + for k := n.kids; k != nil; k = k.next { + if k.walkReadyInOrder(openParent, tmp, f) { + return true + } + } + return false + } + + // Uncommon case: sort the child nodes. We remove the kids from the parent, + // then re-insert after sorting so we can reuse tmp for future sort calls. + *tmp = (*tmp)[:0] + for n.kids != nil { + *tmp = append(*tmp, n.kids) + n.kids.setParent(nil) + } + sort.Sort(sortPriorityNodeSiblingsRFC7540(*tmp)) + for i := len(*tmp) - 1; i >= 0; i-- { + (*tmp)[i].setParent(n) // setParent inserts at the head of n.kids + } + for k := n.kids; k != nil; k = k.next { + if k.walkReadyInOrder(openParent, tmp, f) { + return true + } + } + return false +} + +type sortPriorityNodeSiblingsRFC7540 []*priorityNodeRFC7540 + +func (z sortPriorityNodeSiblingsRFC7540) Len() int { return len(z) } +func (z sortPriorityNodeSiblingsRFC7540) Swap(i, k int) { z[i], z[k] = z[k], z[i] } +func (z sortPriorityNodeSiblingsRFC7540) Less(i, k int) bool { + // Prefer the subtree that has sent fewer bytes relative to its weight. + // See sections 5.3.2 and 5.3.4. + wi, bi := float64(z[i].weight+1), float64(z[i].subtreeBytes) + wk, bk := float64(z[k].weight+1), float64(z[k].subtreeBytes) + if bi == 0 && bk == 0 { + return wi >= wk + } + if bk == 0 { + return false + } + return bi/bk <= wi/wk +} + +type priorityWriteSchedulerRFC7540 struct { + // root is the root of the priority tree, where root.id = 0. + // The root queues control frames that are not associated with any stream. + root priorityNodeRFC7540 + + // nodes maps stream ids to priority tree nodes. + nodes map[uint32]*priorityNodeRFC7540 + + // maxID is the maximum stream id in nodes. + maxID uint32 + + // lists of nodes that have been closed or are idle, but are kept in + // the tree for improved prioritization. When the lengths exceed either + // maxClosedNodesInTree or maxIdleNodesInTree, old nodes are discarded. + closedNodes, idleNodes []*priorityNodeRFC7540 + + // From the config. + maxClosedNodesInTree int + maxIdleNodesInTree int + writeThrottleLimit int32 + enableWriteThrottle bool + + // tmp is scratch space for priorityNode.walkReadyInOrder to reduce allocations. + tmp []*priorityNodeRFC7540 + + // pool of empty queues for reuse. + queuePool writeQueuePool +} + +func (ws *priorityWriteSchedulerRFC7540) OpenStream(streamID uint32, options OpenStreamOptions) { + // The stream may be currently idle but cannot be opened or closed. + if curr := ws.nodes[streamID]; curr != nil { + if curr.state != priorityNodeIdleRFC7540 { + panic(fmt.Sprintf("stream %d already opened", streamID)) + } + curr.state = priorityNodeOpenRFC7540 + return + } + + // RFC 7540, Section 5.3.5: + // "All streams are initially assigned a non-exclusive dependency on stream 0x0. + // Pushed streams initially depend on their associated stream. In both cases, + // streams are assigned a default weight of 16." + parent := ws.nodes[options.PusherID] + if parent == nil { + parent = &ws.root + } + n := &priorityNodeRFC7540{ + q: *ws.queuePool.get(), + id: streamID, + weight: priorityDefaultWeightRFC7540, + state: priorityNodeOpenRFC7540, + } + n.setParent(parent) + ws.nodes[streamID] = n + if streamID > ws.maxID { + ws.maxID = streamID + } +} + +func (ws *priorityWriteSchedulerRFC7540) CloseStream(streamID uint32) { + if streamID == 0 { + panic("violation of WriteScheduler interface: cannot close stream 0") + } + if ws.nodes[streamID] == nil { + panic(fmt.Sprintf("violation of WriteScheduler interface: unknown stream %d", streamID)) + } + if ws.nodes[streamID].state != priorityNodeOpenRFC7540 { + panic(fmt.Sprintf("violation of WriteScheduler interface: stream %d already closed", streamID)) + } + + n := ws.nodes[streamID] + n.state = priorityNodeClosedRFC7540 + n.addBytes(-n.bytes) + + q := n.q + ws.queuePool.put(&q) + n.q.s = nil + if ws.maxClosedNodesInTree > 0 { + ws.addClosedOrIdleNode(&ws.closedNodes, ws.maxClosedNodesInTree, n) + } else { + ws.removeNode(n) + } +} + +func (ws *priorityWriteSchedulerRFC7540) AdjustStream(streamID uint32, priority PriorityParam) { + if streamID == 0 { + panic("adjustPriority on root") + } + + // If streamID does not exist, there are two cases: + // - A closed stream that has been removed (this will have ID <= maxID) + // - An idle stream that is being used for "grouping" (this will have ID > maxID) + n := ws.nodes[streamID] + if n == nil { + if streamID <= ws.maxID || ws.maxIdleNodesInTree == 0 { + return + } + ws.maxID = streamID + n = &priorityNodeRFC7540{ + q: *ws.queuePool.get(), + id: streamID, + weight: priorityDefaultWeightRFC7540, + state: priorityNodeIdleRFC7540, + } + n.setParent(&ws.root) + ws.nodes[streamID] = n + ws.addClosedOrIdleNode(&ws.idleNodes, ws.maxIdleNodesInTree, n) + } + + // Section 5.3.1: A dependency on a stream that is not currently in the tree + // results in that stream being given a default priority (Section 5.3.5). + parent := ws.nodes[priority.StreamDep] + if parent == nil { + n.setParent(&ws.root) + n.weight = priorityDefaultWeightRFC7540 + return + } + + // Ignore if the client tries to make a node its own parent. + if n == parent { + return + } + + // Section 5.3.3: + // "If a stream is made dependent on one of its own dependencies, the + // formerly dependent stream is first moved to be dependent on the + // reprioritized stream's previous parent. The moved dependency retains + // its weight." + // + // That is: if parent depends on n, move parent to depend on n.parent. + for x := parent.parent; x != nil; x = x.parent { + if x == n { + parent.setParent(n.parent) + break + } + } + + // Section 5.3.3: The exclusive flag causes the stream to become the sole + // dependency of its parent stream, causing other dependencies to become + // dependent on the exclusive stream. + if priority.Exclusive { + k := parent.kids + for k != nil { + next := k.next + if k != n { + k.setParent(n) + } + k = next + } + } + + n.setParent(parent) + n.weight = priority.Weight +} + +func (ws *priorityWriteSchedulerRFC7540) Push(wr FrameWriteRequest) { + var n *priorityNodeRFC7540 + if wr.isControl() { + n = &ws.root + } else { + id := wr.StreamID() + n = ws.nodes[id] + if n == nil { + // id is an idle or closed stream. wr should not be a HEADERS or + // DATA frame. In other case, we push wr onto the root, rather + // than creating a new priorityNode. + if wr.DataSize() > 0 { + panic("add DATA on non-open stream") + } + n = &ws.root + } + } + n.q.push(wr) +} + +func (ws *priorityWriteSchedulerRFC7540) Pop() (wr FrameWriteRequest, ok bool) { + ws.root.walkReadyInOrder(false, &ws.tmp, func(n *priorityNodeRFC7540, openParent bool) bool { + limit := int32(math.MaxInt32) + if openParent { + limit = ws.writeThrottleLimit + } + wr, ok = n.q.consume(limit) + if !ok { + return false + } + n.addBytes(int64(wr.DataSize())) + // If B depends on A and B continuously has data available but A + // does not, gradually increase the throttling limit to allow B to + // steal more and more bandwidth from A. + if openParent { + ws.writeThrottleLimit += 1024 + if ws.writeThrottleLimit < 0 { + ws.writeThrottleLimit = math.MaxInt32 + } + } else if ws.enableWriteThrottle { + ws.writeThrottleLimit = 1024 + } + return true + }) + return wr, ok +} + +func (ws *priorityWriteSchedulerRFC7540) addClosedOrIdleNode(list *[]*priorityNodeRFC7540, maxSize int, n *priorityNodeRFC7540) { + if maxSize == 0 { + return + } + if len(*list) == maxSize { + // Remove the oldest node, then shift left. + ws.removeNode((*list)[0]) + x := (*list)[1:] + copy(*list, x) + *list = (*list)[:len(x)] + } + *list = append(*list, n) +} + +func (ws *priorityWriteSchedulerRFC7540) removeNode(n *priorityNodeRFC7540) { + for n.kids != nil { + n.kids.setParent(n.parent) + } + n.setParent(nil) + delete(ws.nodes, n.id) +} diff --git a/backend/vendor/github.com/enetx/http2/writesched_priority_rfc9128.go b/backend/vendor/github.com/enetx/http2/writesched_priority_rfc9128.go new file mode 100644 index 0000000..9b5b880 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/writesched_priority_rfc9128.go @@ -0,0 +1,209 @@ +// Copyright 2025 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "fmt" + "math" +) + +type streamMetadata struct { + location *writeQueue + priority PriorityParam +} + +type priorityWriteSchedulerRFC9218 struct { + // control contains control frames (SETTINGS, PING, etc.). + control writeQueue + + // heads contain the head of a circular list of streams. + // We put these heads within a nested array that represents urgency and + // incremental, as defined in + // https://www.rfc-editor.org/rfc/rfc9218.html#name-priority-parameters. + // 8 represents u=0 up to u=7, and 2 represents i=false and i=true. + heads [8][2]*writeQueue + + // streams contains a mapping between each stream ID and their metadata, so + // we can quickly locate them when needing to, for example, adjust their + // priority. + streams map[uint32]streamMetadata + + // queuePool are empty queues for reuse. + queuePool writeQueuePool + + // prioritizeIncremental is used to determine whether we should prioritize + // incremental streams or not, when urgency is the same in a given Pop() + // call. + prioritizeIncremental bool +} + +func newPriorityWriteSchedulerRFC9128() WriteScheduler { + ws := &priorityWriteSchedulerRFC9218{ + streams: make(map[uint32]streamMetadata), + } + return ws +} + +func (ws *priorityWriteSchedulerRFC9218) OpenStream(streamID uint32, opt OpenStreamOptions) { + if ws.streams[streamID].location != nil { + panic(fmt.Errorf("stream %d already opened", streamID)) + } + q := ws.queuePool.get() + ws.streams[streamID] = streamMetadata{ + location: q, + priority: opt.priority, + } + + u, i := opt.priority.urgency, opt.priority.incremental + if ws.heads[u][i] == nil { + ws.heads[u][i] = q + q.next = q + q.prev = q + } else { + // Queues are stored in a ring. + // Insert the new stream before ws.head, putting it at the end of the list. + q.prev = ws.heads[u][i].prev + q.next = ws.heads[u][i] + q.prev.next = q + q.next.prev = q + } +} + +func (ws *priorityWriteSchedulerRFC9218) CloseStream(streamID uint32) { + metadata := ws.streams[streamID] + q, u, i := metadata.location, metadata.priority.urgency, metadata.priority.incremental + if q == nil { + return + } + if q.next == q { + // This was the only open stream. + ws.heads[u][i] = nil + } else { + q.prev.next = q.next + q.next.prev = q.prev + if ws.heads[u][i] == q { + ws.heads[u][i] = q.next + } + } + delete(ws.streams, streamID) + ws.queuePool.put(q) +} + +func (ws *priorityWriteSchedulerRFC9218) AdjustStream(streamID uint32, priority PriorityParam) { + metadata := ws.streams[streamID] + q, u, i := metadata.location, metadata.priority.urgency, metadata.priority.incremental + if q == nil { + return + } + + // Remove stream from current location. + if q.next == q { + // This was the only open stream. + ws.heads[u][i] = nil + } else { + q.prev.next = q.next + q.next.prev = q.prev + if ws.heads[u][i] == q { + ws.heads[u][i] = q.next + } + } + + // Insert stream to the new queue. + u, i = priority.urgency, priority.incremental + if ws.heads[u][i] == nil { + ws.heads[u][i] = q + q.next = q + q.prev = q + } else { + // Queues are stored in a ring. + // Insert the new stream before ws.head, putting it at the end of the list. + q.prev = ws.heads[u][i].prev + q.next = ws.heads[u][i] + q.prev.next = q + q.next.prev = q + } + + // Update the metadata. + ws.streams[streamID] = streamMetadata{ + location: q, + priority: priority, + } +} + +func (ws *priorityWriteSchedulerRFC9218) Push(wr FrameWriteRequest) { + if wr.isControl() { + ws.control.push(wr) + return + } + q := ws.streams[wr.StreamID()].location + if q == nil { + // This is a closed stream. + // wr should not be a HEADERS or DATA frame. + // We push the request onto the control queue. + if wr.DataSize() > 0 { + panic("add DATA on non-open stream") + } + ws.control.push(wr) + return + } + q.push(wr) +} + +func (ws *priorityWriteSchedulerRFC9218) Pop() (FrameWriteRequest, bool) { + // Control and RST_STREAM frames first. + if !ws.control.empty() { + return ws.control.shift(), true + } + + // On the next Pop(), we want to prioritize incremental if we prioritized + // non-incremental request of the same urgency this time. Vice-versa. + // i.e. when there are incremental and non-incremental requests at the same + // priority, we give 50% of our bandwidth to the incremental ones in + // aggregate and 50% to the first non-incremental one (since + // non-incremental streams do not use round-robin writes). + ws.prioritizeIncremental = !ws.prioritizeIncremental + + // Always prioritize lowest u (i.e. highest urgency level). + for u := range ws.heads { + for i := range ws.heads[u] { + // When we want to prioritize incremental, we try to pop i=true + // first before i=false when u is the same. + if ws.prioritizeIncremental { + i = (i + 1) % 2 + } + q := ws.heads[u][i] + if q == nil { + continue + } + for { + if wr, ok := q.consume(math.MaxInt32); ok { + if i == 1 { + // For incremental streams, we update head to q.next so + // we can round-robin between multiple streams that can + // immediately benefit from partial writes. + ws.heads[u][i] = q.next + } else { + // For non-incremental streams, we try to finish one to + // completion rather than doing round-robin. However, + // we update head here so that if q.consume() is !ok + // (e.g. the stream has no more frame to consume), head + // is updated to the next q that has frames to consume + // on future iterations. This way, we do not prioritize + // writing to unavailable stream on next Pop() calls, + // preventing head-of-line blocking. + ws.heads[u][i] = q + } + return wr, true + } + q = q.next + if q == ws.heads[u][i] { + break + } + } + + } + } + return FrameWriteRequest{}, false +} diff --git a/backend/vendor/github.com/enetx/http2/writesched_random.go b/backend/vendor/github.com/enetx/http2/writesched_random.go new file mode 100644 index 0000000..f2e55e0 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/writesched_random.go @@ -0,0 +1,77 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import "math" + +// NewRandomWriteScheduler constructs a WriteScheduler that ignores HTTP/2 +// priorities. Control frames like SETTINGS and PING are written before DATA +// frames, but if no control frames are queued and multiple streams have queued +// HEADERS or DATA frames, Pop selects a ready stream arbitrarily. +func NewRandomWriteScheduler() WriteScheduler { + return &randomWriteScheduler{sq: make(map[uint32]*writeQueue)} +} + +type randomWriteScheduler struct { + // zero are frames not associated with a specific stream. + zero writeQueue + + // sq contains the stream-specific queues, keyed by stream ID. + // When a stream is idle, closed, or emptied, it's deleted + // from the map. + sq map[uint32]*writeQueue + + // pool of empty queues for reuse. + queuePool writeQueuePool +} + +func (ws *randomWriteScheduler) OpenStream(streamID uint32, options OpenStreamOptions) { + // no-op: idle streams are not tracked +} + +func (ws *randomWriteScheduler) CloseStream(streamID uint32) { + q, ok := ws.sq[streamID] + if !ok { + return + } + delete(ws.sq, streamID) + ws.queuePool.put(q) +} + +func (ws *randomWriteScheduler) AdjustStream(streamID uint32, priority PriorityParam) { + // no-op: priorities are ignored +} + +func (ws *randomWriteScheduler) Push(wr FrameWriteRequest) { + if wr.isControl() { + ws.zero.push(wr) + return + } + id := wr.StreamID() + q, ok := ws.sq[id] + if !ok { + q = ws.queuePool.get() + ws.sq[id] = q + } + q.push(wr) +} + +func (ws *randomWriteScheduler) Pop() (FrameWriteRequest, bool) { + // Control and RST_STREAM frames first. + if !ws.zero.empty() { + return ws.zero.shift(), true + } + // Iterate over all non-idle streams until finding one that can be consumed. + for streamID, q := range ws.sq { + if wr, ok := q.consume(math.MaxInt32); ok { + if q.empty() { + delete(ws.sq, streamID) + ws.queuePool.put(q) + } + return wr, true + } + } + return FrameWriteRequest{}, false +} diff --git a/backend/vendor/github.com/enetx/http2/writesched_roundrobin.go b/backend/vendor/github.com/enetx/http2/writesched_roundrobin.go new file mode 100644 index 0000000..737cff9 --- /dev/null +++ b/backend/vendor/github.com/enetx/http2/writesched_roundrobin.go @@ -0,0 +1,119 @@ +// Copyright 2023 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "fmt" + "math" +) + +type roundRobinWriteScheduler struct { + // control contains control frames (SETTINGS, PING, etc.). + control writeQueue + + // streams maps stream ID to a queue. + streams map[uint32]*writeQueue + + // stream queues are stored in a circular linked list. + // head is the next stream to write, or nil if there are no streams open. + head *writeQueue + + // pool of empty queues for reuse. + queuePool writeQueuePool +} + +// newRoundRobinWriteScheduler constructs a new write scheduler. +// The round robin scheduler prioritizes control frames +// like SETTINGS and PING over DATA frames. +// When there are no control frames to send, it performs a round-robin +// selection from the ready streams. +func newRoundRobinWriteScheduler() WriteScheduler { + ws := &roundRobinWriteScheduler{ + streams: make(map[uint32]*writeQueue), + } + return ws +} + +func (ws *roundRobinWriteScheduler) OpenStream(streamID uint32, options OpenStreamOptions) { + if ws.streams[streamID] != nil { + panic(fmt.Errorf("stream %d already opened", streamID)) + } + q := ws.queuePool.get() + ws.streams[streamID] = q + if ws.head == nil { + ws.head = q + q.next = q + q.prev = q + } else { + // Queues are stored in a ring. + // Insert the new stream before ws.head, putting it at the end of the list. + q.prev = ws.head.prev + q.next = ws.head + q.prev.next = q + q.next.prev = q + } +} + +func (ws *roundRobinWriteScheduler) CloseStream(streamID uint32) { + q := ws.streams[streamID] + if q == nil { + return + } + if q.next == q { + // This was the only open stream. + ws.head = nil + } else { + q.prev.next = q.next + q.next.prev = q.prev + if ws.head == q { + ws.head = q.next + } + } + delete(ws.streams, streamID) + ws.queuePool.put(q) +} + +func (ws *roundRobinWriteScheduler) AdjustStream(streamID uint32, priority PriorityParam) {} + +func (ws *roundRobinWriteScheduler) Push(wr FrameWriteRequest) { + if wr.isControl() { + ws.control.push(wr) + return + } + q := ws.streams[wr.StreamID()] + if q == nil { + // This is a closed stream. + // wr should not be a HEADERS or DATA frame. + // We push the request onto the control queue. + if wr.DataSize() > 0 { + panic("add DATA on non-open stream") + } + ws.control.push(wr) + return + } + q.push(wr) +} + +func (ws *roundRobinWriteScheduler) Pop() (FrameWriteRequest, bool) { + // Control and RST_STREAM frames first. + if !ws.control.empty() { + return ws.control.shift(), true + } + if ws.head == nil { + return FrameWriteRequest{}, false + } + q := ws.head + for { + if wr, ok := q.consume(math.MaxInt32); ok { + ws.head = q.next + return wr, true + } + q = q.next + if q == ws.head { + break + } + } + return FrameWriteRequest{}, false +} diff --git a/backend/vendor/github.com/enetx/iter/LICENSE b/backend/vendor/github.com/enetx/iter/LICENSE new file mode 100644 index 0000000..5798070 --- /dev/null +++ b/backend/vendor/github.com/enetx/iter/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2025 enetx + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/backend/vendor/github.com/enetx/iter/README.md b/backend/vendor/github.com/enetx/iter/README.md new file mode 100644 index 0000000..243d405 --- /dev/null +++ b/backend/vendor/github.com/enetx/iter/README.md @@ -0,0 +1,79 @@ +

+ GOPHER_ROCKS +

+ +# iter — Lazy Iterators with Generics for Go + +[![Go Reference](https://pkg.go.dev/badge/github.com/enetx/iter.svg)](https://pkg.go.dev/github.com/enetx/iter) +[![Go Report Card](https://goreportcard.com/badge/github.com/enetx/iter)](https://goreportcard.com/report/github.com/enetx/iter) +[![Coverage Status](https://coveralls.io/repos/github/enetx/iter/badge.svg?branch=main&service=github)](https://coveralls.io/github/enetx/iter?branch=main) +[![Go](https://github.com/enetx/iter/actions/workflows/go.yml/badge.svg)](https://github.com/enetx/iter/actions/workflows/go.yml) +[![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/enetx/iter) + +`iter` is a library of lazy iterators for Go. Built on pure functions, no unnecessary allocations, with full generics support and a clean functional style. + +Apply transformations like `Map`, `Filter`, `Take`, `Fold`, `Zip` directly to sequences — lazily and efficiently. + +--- + +## 📦 Installation + +```bash +go get github.com/enetx/iter +``` + +--- + +## 🚀 Example + +```go +package main + +import ( + "fmt" + "github.com/enetx/iter" +) + +func main() { + // Extract even numbers and square them: + s := iter.FromSlice([]int{1, 2, 3, 4, 5}) + s = iter.Filter(s, func(x int) bool { return x%2 == 0 }) // 2, 4 + s = iter.Map(s, func(x int) int { return x * x }) // 4, 16 + out := iter.ToSlice(s) + fmt.Println(out) // [4 16] +} +``` + +--- + +## ✨ Features + +- ✅ **Lazy sequences** — transformations are not applied until iteration begins. +- ✅ **Generics-powered** — works with any types `T`, `U`, structs, etc. +- ✅ **Zero-allocation** — avoids unnecessary memory allocations. +- ✅ **Functional API** — each transformation is a pure function: `Map`, `Filter`, `Take`, `Skip`, `StepBy`, `Flatten`, `Zip`, `Enumerate`, `Fold`, `Reduce`, and many more. +- ✅ **Supports pairs, maps, channels** — `Seq2`, `FromMap`, `FromChan`, and beyond. + +--- + +## 🔬 More Examples + +```go +// Simple range with step +r := iter.Iota(1, 10) // 1..9 +r = iter.StepBy(r, 3) // 1, 4, 7 +fmt.Println(iter.ToSlice(r)) // → [1 4 7] + +// Iterate over a map +m := map[string]int{"a": 1, "b": 2} +s2 := iter.FromMap(m) +iter.ForEach2(s2, func(k string, v int) { + fmt.Printf("%s → %d\n", k, v) +}) +``` + +--- + +## ⚖️ License + +MIT diff --git a/backend/vendor/github.com/enetx/iter/advanced.go b/backend/vendor/github.com/enetx/iter/advanced.go new file mode 100644 index 0000000..cfc906f --- /dev/null +++ b/backend/vendor/github.com/enetx/iter/advanced.go @@ -0,0 +1,231 @@ +package iter + +// Cycle creates an infinite sequence by repeating the given sequence. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3}) +// iter.Take(iter.Cycle(s), 7) // yields: 1, 2, 3, 1, 2, 3, 1 +func Cycle[T any](s Seq[T]) Seq[T] { + return func(yield func(T) bool) { + has := false + s(func(T) bool { + has = true + return false + }) + if !has { + return + } + for { + keep := true + s(func(v T) bool { + if !yield(v) { + keep = false + return false + } + return true + }) + if !keep { + return + } + } + } +} + +// Dedup removes consecutive duplicate elements. +// +// Example: +// +// s := iter.FromSlice([]int{1, 1, 2, 2, 2, 3, 3}) +// iter.Dedup(s) // yields: 1, 2, 3 +func Dedup[T comparable](s Seq[T]) Seq[T] { + return func(yield func(T) bool) { + var prev T + first := true + s(func(v T) bool { + if first || v != prev { + prev = v + first = false + return yield(v) + } + return true + }) + } +} + +// DedupBy removes consecutive elements where the provided function returns the same value. +// +// Example: +// +// s := iter.FromSlice([]string{"a", "aa", "b", "bb", "cc"}) +// iter.DedupBy(s, func(a, b string) bool { return len(a) == len(b) }) +// // yields: "a", "b", "cc" +func DedupBy[T any](s Seq[T], eq func(a, b T) bool) Seq[T] { + return func(yield func(T) bool) { + var prev T + first := true + s(func(v T) bool { + if first || !eq(prev, v) { + prev = v + first = false + return yield(v) + } + return true + }) + } +} + +// Intersperse inserts a separator between each element. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3}) +// iter.Intersperse(s, 0) // yields: 1, 0, 2, 0, 3 +func Intersperse[T any](s Seq[T], sep T) Seq[T] { + return func(yield func(T) bool) { + first := true + s(func(v T) bool { + if !first { + if !yield(sep) { + return false + } + } + first = false + return yield(v) + }) + } +} + +// Flatten flattens a sequence of slices into a single sequence. +// +// Example: +// +// s := iter.FromSlice([][]int{{1, 2}, {3, 4}, {5}}) +// iter.Flatten(s) // yields: 1, 2, 3, 4, 5 +func Flatten[T any](ss Seq[[]T]) Seq[T] { + return func(yield func(T) bool) { + ss(func(slice []T) bool { + for _, v := range slice { + if !yield(v) { + return false + } + } + return true + }) + } +} + +// FlattenSeq flattens a sequence of sequences into a single sequence. +// +// Example: +// +// seqs := []iter.Seq[int]{ +// iter.FromSlice([]int{1, 2}), +// iter.FromSlice([]int{3, 4}), +// } +// s := iter.FromSlice(seqs) +// iter.FlattenSeq(s) // yields: 1, 2, 3, 4 +func FlattenSeq[T any](ss Seq[Seq[T]]) Seq[T] { + return func(yield func(T) bool) { + ss(func(s Seq[T]) bool { + keep := true + s(func(v T) bool { + if !yield(v) { + keep = false + return false + } + return true + }) + return keep + }) + } +} + +// Combinations generates all combinations of k elements from the sequence. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4}) +// iter.Combinations(s, 2) // yields: [1,2], [1,3], [1,4], [2,3], [2,4], [3,4] +func Combinations[T any](s Seq[T], k int) Seq[[]T] { + return func(yield func([]T) bool) { + slice := ToSlice(s) + n := len(slice) + + if k > n || k <= 0 { + return + } + + indices := make([]int, k) + for i := range indices { + indices[i] = i + } + + for { + combination := make([]T, k) + for i, idx := range indices { + combination[i] = slice[idx] + } + + if !yield(combination) { + return + } + + i := k - 1 + for i >= 0 && indices[i] == n-k+i { + i-- + } + + if i < 0 { + break + } + + indices[i]++ + for j := i + 1; j < k; j++ { + indices[j] = indices[j-1] + 1 + } + } + } +} + +// Permutations generates all permutations of the sequence elements. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3}) +// iter.Permutations(s) // yields: [1,2,3], [1,3,2], [2,1,3], [2,3,1], [3,1,2], [3,2,1] +func Permutations[T any](s Seq[T]) Seq[[]T] { + return func(yield func([]T) bool) { + slice := ToSlice(s) + n := len(slice) + + if n == 0 { + return + } + + var generate func(int) bool + generate = func(k int) bool { + if k == 1 { + perm := make([]T, n) + copy(perm, slice) + return yield(perm) + } + + for i := range k { + if !generate(k - 1) { + return false + } + + if k%2 == 0 { + slice[i], slice[k-1] = slice[k-1], slice[i] + } else { + slice[0], slice[k-1] = slice[k-1], slice[0] + } + } + + return true + } + + generate(n) + } +} diff --git a/backend/vendor/github.com/enetx/iter/aggregate.go b/backend/vendor/github.com/enetx/iter/aggregate.go new file mode 100644 index 0000000..355019e --- /dev/null +++ b/backend/vendor/github.com/enetx/iter/aggregate.go @@ -0,0 +1,269 @@ +package iter + +import "slices" + +// Find returns the first element that satisfies the predicate. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// value, ok := iter.Find(s, func(x int) bool { return x > 3 }) // 4, true +func Find[T any](s Seq[T], p func(T) bool) (T, bool) { + var result T + found := false + s(func(v T) bool { + if p(v) { + result = v + found = true + return false + } + return true + }) + return result, found +} + +// Any returns true if any element satisfies the predicate. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// hasEven := iter.Any(s, func(x int) bool { return x%2 == 0 }) // true +func Any[T any](s Seq[T], p func(T) bool) bool { + found := false + s(func(v T) bool { + if p(v) { + found = true + return false + } + return true + }) + return found +} + +// All returns true if all elements satisfy the predicate. +// +// Example: +// +// s := iter.FromSlice([]int{2, 4, 6, 8}) +// allEven := iter.All(s, func(x int) bool { return x%2 == 0 }) // true +func All[T any](s Seq[T], p func(T) bool) bool { + all := true + s(func(v T) bool { + if !p(v) { + all = false + return false + } + return true + }) + return all +} + +// Fold reduces the sequence to a single value using an accumulator. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4}) +// sum := iter.Fold(s, 0, func(acc, x int) int { return acc + x }) // 10 +func Fold[T, A any](s Seq[T], acc A, f func(A, T) A) A { + s(func(v T) bool { + acc = f(acc, v) + return true + }) + return acc +} + +// Reduce reduces the sequence to a single value of the same type. +// Returns false if the sequence is empty. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4}) +// sum, ok := iter.Reduce(s, func(a, b int) int { return a + b }) // 10, true +func Reduce[T any](s Seq[T], f func(T, T) T) (T, bool) { + var result T + first := true + s(func(v T) bool { + if first { + result = v + first = false + } else { + result = f(result, v) + } + return true + }) + return result, !first +} + +// MinBy returns the minimum element according to the comparison function. +// +// Example: +// +// s := iter.FromSlice([]int{3, 1, 4, 1, 5}) +// min, ok := iter.MinBy(s, func(a, b int) bool { return a < b }) // 1, true +func MinBy[T any](s Seq[T], less func(a, b T) bool) (T, bool) { + var min T + found := false + s(func(v T) bool { + if !found || less(v, min) { + min = v + found = true + } + return true + }) + return min, found +} + +// MaxBy returns the maximum element according to the comparison function. +// +// Example: +// +// s := iter.FromSlice([]int{3, 1, 4, 1, 5}) +// max, ok := iter.MaxBy(s, func(a, b int) bool { return a < b }) // 5, true +func MaxBy[T any](s Seq[T], less func(a, b T) bool) (T, bool) { + var max T + found := false + s(func(v T) bool { + if !found || less(max, v) { + max = v + found = true + } + return true + }) + return max, found +} + +// CountBy counts elements by grouping them using a key function. +// +// Example: +// +// s := iter.FromSlice([]string{"a", "bb", "ccc", "dd"}) +// counts := iter.CountBy(s, func(s string) int { return len(s) }) +// // map[1:1 2:2 3:1] +func CountBy[T any, K comparable](s Seq[T], key func(T) K) map[K]int { + counts := make(map[K]int) + s(func(v T) bool { + k := key(v) + counts[k]++ + return true + }) + return counts +} + +// Partition splits the sequence into two slices based on a predicate. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// evens, odds := iter.Partition(s, func(x int) bool { return x%2 == 0 }) +// // evens: [2, 4], odds: [1, 3, 5] +func Partition[T any](s Seq[T], pred func(T) bool) (left, right []T) { + s(func(v T) bool { + if pred(v) { + left = append(left, v) + } else { + right = append(right, v) + } + return true + }) + return left, right +} + +// Counter returns a map with counts of each element. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 1, 3, 2, 1}) +// counts := iter.Counter(s) // map[1:3 2:2 3:1] +func Counter[T any](s Seq[T]) map[any]int { + counts := make(map[any]int) + s(func(v T) bool { + counts[any(v)]++ + return true + }) + return counts +} + +// SortBy returns a sorted sequence using the provided comparison function. +// Note: This collects all elements into a slice first. +// +// Example: +// +// s := iter.FromSlice([]int{3, 1, 4, 1, 5}) +// iter.SortBy(s, func(a, b int) bool { return a < b }) // yields: 1, 1, 3, 4, 5 +func SortBy[T any](s Seq[T], less func(a, b T) bool) Seq[T] { + slice := ToSlice(s) + slices.SortFunc(slice, func(a, b T) int { + if less(a, b) { + return -1 + } + if less(b, a) { + return 1 + } + return 0 + }) + return FromSlice(slice) +} + +// Position returns the index of the first element that satisfies the predicate. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// pos, ok := iter.Position(s, func(x int) bool { return x > 3 }) // 3, true +func Position[T any](s Seq[T], pred func(T) bool) (int, bool) { + index := 0 + found := false + s(func(v T) bool { + if pred(v) { + found = true + return false + } + index++ + return true + }) + + if found { + return index, true + } + return -1, false +} + +// RPosition returns the index of the last element that satisfies the predicate. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 3, 2}) +// pos, ok := iter.RPosition(s, func(x int) bool { return x == 3 }) // 4, true +func RPosition[T any](s Seq[T], pred func(T) bool) (int, bool) { + slice := ToSlice(s) + for i := len(slice) - 1; i >= 0; i-- { + if pred(slice[i]) { + return i, true + } + } + return -1, false +} + +// IsPartitioned checks if the sequence is partitioned according to the predicate. +// A sequence is partitioned if all elements satisfying the predicate come before +// all elements that don't. +// +// Example: +// +// s := iter.FromSlice([]int{2, 4, 6, 1, 3, 5}) +// partitioned := iter.IsPartitioned(s, func(x int) bool { return x%2 == 0 }) // true +func IsPartitioned[T any](s Seq[T], pred func(T) bool) bool { + foundFalse := false + result := true + s(func(v T) bool { + if foundFalse && pred(v) { + result = false + return false + } + if !pred(v) { + foundFalse = true + } + return true + }) + return result +} diff --git a/backend/vendor/github.com/enetx/iter/combine.go b/backend/vendor/github.com/enetx/iter/combine.go new file mode 100644 index 0000000..a2678c9 --- /dev/null +++ b/backend/vendor/github.com/enetx/iter/combine.go @@ -0,0 +1,278 @@ +package iter + +// Chain concatenates multiple sequences into one. +// +// Example: +// +// s1 := iter.FromSlice([]int{1, 2}) +// s2 := iter.FromSlice([]int{3, 4}) +// iter.Chain(s1, s2) // yields: 1, 2, 3, 4 +func Chain[T any](head Seq[T], rest ...Seq[T]) Seq[T] { + return func(yield func(T) bool) { + // Process head sequence + continueProcessing := true + head(func(v T) bool { + if !yield(v) { + continueProcessing = false + return false + } + return true + }) + + if !continueProcessing { + return + } + + // Process rest sequences + for _, s := range rest { + s(func(v T) bool { + if !yield(v) { + continueProcessing = false + return false + } + return true + }) + + if !continueProcessing { + return + } + } + } +} + +// Zip combines two sequences into pairs, stopping when either sequence ends. +// +// Example: +// +// s1 := iter.FromSlice([]int{1, 2, 3}) +// s2 := iter.FromSlice([]string{"a", "b"}) +// iter.Zip(s1, s2) // yields: (1, "a"), (2, "b") +func Zip[A, B any](a Seq[A], b Seq[B]) Seq2[A, B] { + return func(y func(A, B) bool) { + an, as := Pull(a) + defer as() + bn, bs := Pull(b) + defer bs() + for { + av, ok := an() + if !ok { + return + } + bv, ok := bn() + if !ok { + return + } + if !y(av, bv) { + return + } + } + } +} + +// ZipWith combines two sequences using a function, stopping when either sequence ends. +// +// Example: +// +// s1 := iter.FromSlice([]int{1, 2, 3}) +// s2 := iter.FromSlice([]int{10, 20, 30}) +// iter.ZipWith(s1, s2, func(a, b int) int { return a + b }) // yields: 11, 22, 33 +func ZipWith[A, B, R any](a Seq[A], b Seq[B], f func(A, B) R) Seq[R] { + return func(yield func(R) bool) { + an, as := Pull(a) + defer as() + bn, bs := Pull(b) + defer bs() + for { + av, ok := an() + if !ok { + return + } + bv, ok := bn() + if !ok { + return + } + if !yield(f(av, bv)) { + return + } + } + } +} + +// Interleave alternates between elements from two sequences. +// +// Example: +// +// s1 := iter.FromSlice([]int{1, 2, 3}) +// s2 := iter.FromSlice([]int{10, 20, 30}) +// iter.Interleave(s1, s2) // yields: 1, 10, 2, 20, 3, 30 +func Interleave[T any](a, b Seq[T]) Seq[T] { + return func(yield func(T) bool) { + an, as := Pull(a) + defer as() + bn, bs := Pull(b) + defer bs() + + for { + av, aok := an() + if aok { + if !yield(av) { + return + } + } + + bv, bok := bn() + if bok { + if !yield(bv) { + return + } + } + + if !aok && !bok { + return + } + } + } +} + +// Windows returns a sequence of sliding windows of size n. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// iter.Windows(s, 3) // yields: [1,2,3], [2,3,4], [3,4,5] +func Windows[T any](s Seq[T], n int) Seq[[]T] { + return func(yield func([]T) bool) { + if n <= 0 { + return + } + + window := make([]T, 0, n) + s(func(v T) bool { + window = append(window, v) + if len(window) == n { + windowCopy := make([]T, n) + copy(windowCopy, window) + if !yield(windowCopy) { + return false + } + window = window[1:] + } + return true + }) + } +} + +// Chunks returns a sequence of chunks of size n. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// iter.Chunks(s, 2) // yields: [1,2], [3,4], [5] +func Chunks[T any](s Seq[T], n int) Seq[[]T] { + return func(yield func([]T) bool) { + if n <= 0 { + return + } + + chunk := make([]T, 0, n) + s(func(v T) bool { + chunk = append(chunk, v) + if len(chunk) == n { + if !yield(chunk) { + return false + } + chunk = make([]T, 0, n) + } + return true + }) + + if len(chunk) > 0 { + yield(chunk) + } + } +} + +// GroupByAdjacent groups consecutive elements that are considered the same by the comparison function. +// +// Example: +// +// s := iter.FromSlice([]int{1, 1, 2, 2, 2, 3}) +// iter.GroupByAdjacent(s, func(a, b int) bool { return a == b }) +// // yields: [1,1], [2,2,2], [3] +func GroupByAdjacent[T any](s Seq[T], same func(a, b T) bool) Seq[[]T] { + return func(yield func([]T) bool) { + var group []T + var prev T + first := true + cont := true + + s(func(v T) bool { + if first { + group = []T{v} + prev = v + first = false + return true + } + if same(prev, v) { + group = append(group, v) + prev = v + return true + } + + out := make([]T, len(group)) + copy(out, group) + if !yield(out) { + cont = false + return false + } + group = []T{v} + prev = v + return true + }) + + if cont && len(group) > 0 { + out := make([]T, len(group)) + copy(out, group) + _ = yield(out) + } + } +} + +// Chain2 concatenates multiple Seq2 sequences into one. +// +// Example: +// +// s1 := iter.FromMap(map[int]string{1: "a"}) +// s2 := iter.FromMap(map[int]string{2: "b"}) +// iter.Chain2(s1, s2) // yields: (1, "a"), (2, "b") +func Chain2[K, V any](head Seq2[K, V], rest ...Seq2[K, V]) Seq2[K, V] { + return func(yield func(K, V) bool) { + // Process head sequence + continueProcessing := true + head(func(k K, v V) bool { + if !yield(k, v) { + continueProcessing = false + return false + } + return true + }) + + if !continueProcessing { + return + } + + for _, s := range rest { + s(func(k K, v V) bool { + if !yield(k, v) { + continueProcessing = false + return false + } + return true + }) + + if !continueProcessing { + return + } + } + } +} diff --git a/backend/vendor/github.com/enetx/iter/comparison.go b/backend/vendor/github.com/enetx/iter/comparison.go new file mode 100644 index 0000000..b322e43 --- /dev/null +++ b/backend/vendor/github.com/enetx/iter/comparison.go @@ -0,0 +1,210 @@ +package iter + +import "reflect" + +// Cmp compares two sequences lexicographically using the provided comparison function. +// Returns -1 if a < b, 0 if a == b, 1 if a > b. +// +// Example: +// +// s1 := iter.FromSlice([]int{1, 2, 3}) +// s2 := iter.FromSlice([]int{1, 2, 4}) +// result := iter.Cmp(s1, s2, func(a, b int) int { +// if a < b { return -1 } +// if a > b { return 1 } +// return 0 +// }) // -1 +func Cmp[T any](a, b Seq[T], cmp func(T, T) int) int { + an, as := Pull(a) + defer as() + bn, bs := Pull(b) + defer bs() + + for { + av, aok := an() + bv, bok := bn() + + if !aok && !bok { + return 0 + } + if !aok { + return -1 + } + if !bok { + return 1 + } + + if c := cmp(av, bv); c != 0 { + return c + } + } +} + +// Equal checks if two sequences are equal (same elements in same order). +// +// Example: +// +// s1 := iter.FromSlice([]int{1, 2, 3}) +// s2 := iter.FromSlice([]int{1, 2, 3}) +// equal := iter.Equal(s1, s2) // true +func Equal[T any](a, b Seq[T]) bool { + var zero T + if reflect.ValueOf(zero).Comparable() { + return EqualBy(a, b, func(x, y T) bool { return any(x) == any(y) }) + } + return EqualBy(a, b, func(x, y T) bool { return reflect.DeepEqual(x, y) }) +} + +func EqualBy[T any](a, b Seq[T], eq func(T, T) bool) bool { + an, as := Pull(a) + defer as() + bn, bs := Pull(b) + defer bs() + + for { + av, aok := an() + bv, bok := bn() + + if aok != bok { + return false + } + if !aok { + return true + } + if !eq(av, bv) { + return false + } + } +} + +// Lt checks if sequence a is lexicographically less than sequence b. +// +// Example: +// +// s1 := iter.FromSlice([]int{1, 2, 3}) +// s2 := iter.FromSlice([]int{1, 2, 4}) +// isLess := iter.Lt(s1, s2, func(a, b int) bool { return a < b }) // true +func Lt[T any](a, b Seq[T], less func(T, T) bool) bool { + an, as := Pull(a) + defer as() + bn, bs := Pull(b) + defer bs() + + for { + av, aok := an() + bv, bok := bn() + + if !aok && bok { + return true + } + if !aok || !bok { + return false + } + + if less(av, bv) { + return true + } + if less(bv, av) { + return false + } + } +} + +// Le checks if sequence a is lexicographically less than or equal to sequence b. +// +// Example: +// +// s1 := iter.FromSlice([]int{1, 2, 3}) +// s2 := iter.FromSlice([]int{1, 2, 3}) +// isLessOrEqual := iter.Le(s1, s2, func(a, b int) bool { return a < b }) // true +func Le[T any](a, b Seq[T], less func(T, T) bool) bool { + an, as := Pull(a) + defer as() + bn, bs := Pull(b) + defer bs() + + for { + av, aok := an() + bv, bok := bn() + + if !aok { + return true + } + if !bok { + return false + } + + if less(av, bv) { + return true + } + if less(bv, av) { + return false + } + } +} + +// Gt checks if sequence a is lexicographically greater than sequence b. +// +// Example: +// +// s1 := iter.FromSlice([]int{1, 2, 4}) +// s2 := iter.FromSlice([]int{1, 2, 3}) +// isGreater := iter.Gt(s1, s2, func(a, b int) bool { return a < b }) // true +func Gt[T any](a, b Seq[T], less func(T, T) bool) bool { + an, as := Pull(a) + defer as() + bn, bs := Pull(b) + defer bs() + + for { + av, aok := an() + bv, bok := bn() + + if !bok && aok { + return true + } + if !aok || !bok { + return false + } + + if less(bv, av) { + return true + } + if less(av, bv) { + return false + } + } +} + +// Ge checks if sequence a is lexicographically greater than or equal to sequence b. +// +// Example: +// +// s1 := iter.FromSlice([]int{1, 2, 3}) +// s2 := iter.FromSlice([]int{1, 2, 3}) +// isGreaterOrEqual := iter.Ge(s1, s2, func(a, b int) bool { return a < b }) // true +func Ge[T any](a, b Seq[T], less func(T, T) bool) bool { + an, as := Pull(a) + defer as() + bn, bs := Pull(b) + defer bs() + + for { + av, aok := an() + bv, bok := bn() + + if !bok { + return true + } + if !aok { + return false + } + + if less(bv, av) { + return true + } + if less(av, bv) { + return false + } + } +} diff --git a/backend/vendor/github.com/enetx/iter/conversion.go b/backend/vendor/github.com/enetx/iter/conversion.go new file mode 100644 index 0000000..1a2f5b1 --- /dev/null +++ b/backend/vendor/github.com/enetx/iter/conversion.go @@ -0,0 +1,170 @@ +package iter + +import ( + "context" + "iter" +) + +// Pull converts a push-style iterator (Seq) to a pull-style iterator. +// Returns a next function that yields the next value and a boolean indicating if valid, +// and a stop function that should be called to release resources. +// +// Example: +// +// next, stop := iter.Pull(iter.FromSlice([]int{1, 2, 3})) +// defer stop() +// for { +// v, ok := next() +// if !ok { break } +// fmt.Println(v) +// } +func Pull[T any](s Seq[T]) (next func() (T, bool), stop func()) { + return iter.Pull(iter.Seq[T](s)) +} + +// Pull2 converts a push-style iterator (Seq2) to a pull-style iterator. +func Pull2[K, V any](s Seq2[K, V]) (next func() (K, V, bool), stop func()) { + return iter.Pull2(iter.Seq2[K, V](s)) +} + +// Context wraps a sequence with context cancellation. +// If the context is cancelled, iteration stops early. +// +// Example: +// +// ctx, cancel := context.WithTimeout(context.Background(), time.Second) +// defer cancel() +// s := iter.Context(iter.FromSlice([]int{1, 2, 3}), ctx) +func Context[T any](s Seq[T], ctx context.Context) Seq[T] { + return func(yield func(T) bool) { + if err := ctx.Err(); err != nil { + return + } + s(func(v T) bool { + select { + case <-ctx.Done(): + return false + default: + return yield(v) + } + }) + } +} + +// Context2 wraps a key-value sequence with context cancellation. +// If the context is cancelled, iteration stops early. +// +// Example: +// +// ctx, cancel := context.WithTimeout(context.Background(), time.Second) +// defer cancel() +// s := iter.Context2(iter.FromMap(map[int]string{1: "a", 2: "b"}), ctx) +func Context2[K, V any](s Seq2[K, V], ctx context.Context) Seq2[K, V] { + return func(yield func(K, V) bool) { + if err := ctx.Err(); err != nil { + return + } + s(func(k K, v V) bool { + select { + case <-ctx.Done(): + return false + default: + return yield(k, v) + } + }) + } +} + +// ToChan converts a sequence to a channel. +// The channel is closed when the sequence is exhausted or context is cancelled. +// +// Example: +// +// ctx := context.Background() +// ch := iter.ToChan(iter.FromSlice([]int{1, 2, 3}), ctx) +// for v := range ch { +// fmt.Println(v) +// } +func ToChan[T any](s Seq[T], ctx context.Context) chan T { + ch := make(chan T) + go func() { + defer close(ch) + if err := ctx.Err(); err != nil { + return + } + s(func(v T) bool { + select { + case <-ctx.Done(): + return false + case ch <- v: + return true + } + }) + }() + return ch +} + +// ToChan2 converts a key-value sequence to a channel of Pair pairs. +// The channel is closed when the sequence is exhausted or context is cancelled. +// +// Example: +// +// ctx := context.Background() +// ch := iter.ToChan2(iter.FromMap(map[int]string{1: "a", 2: "b"}), ctx) +// for kv := range ch { +// fmt.Printf("%d: %s\n", kv.K, kv.V) +// } +func ToChan2[K, V any](s Seq2[K, V], ctx context.Context) chan Pair[K, V] { + ch := make(chan Pair[K, V]) + go func() { + defer close(ch) + if err := ctx.Err(); err != nil { + return + } + s(func(k K, v V) bool { + select { + case <-ctx.Done(): + return false + case ch <- Pair[K, V]{k, v}: + return true + } + }) + }() + return ch +} + +// ToSlice collects all elements from the sequence into a slice. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3}) +// sl := iter.ToSlice(s) // [1, 2, 3] +func ToSlice[T any](s Seq[T]) []T { + out := make([]T, 0) + s(func(v T) bool { + out = append(out, v) + return true + }) + return out +} + +// ToMap collects all key-value pairs into a map. +// Later pairs with the same key will overwrite earlier ones. +func ToMap[K comparable, V any](s Seq2[K, V]) map[K]V { + m := make(map[K]V) + s(func(k K, v V) bool { + m[k] = v + return true + }) + return m +} + +// ToPairs collects all key-value pairs into a slice of Pair structs. +func ToPairs[K, V any](s Seq2[K, V]) []Pair[K, V] { + out := make([]Pair[K, V], 0) + s(func(k K, v V) bool { + out = append(out, Pair[K, V]{k, v}) + return true + }) + return out +} diff --git a/backend/vendor/github.com/enetx/iter/generators.go b/backend/vendor/github.com/enetx/iter/generators.go new file mode 100644 index 0000000..6241c89 --- /dev/null +++ b/backend/vendor/github.com/enetx/iter/generators.go @@ -0,0 +1,128 @@ +package iter + +// Iota generates a sequence of numbers from start (inclusive) to stop (exclusive) with the given step. +// If no step is provided, defaults to 1. +// +// Example: +// +// iter.Iota(1, 5) // yields: 1, 2, 3, 4 +// iter.Iota(1, 10, 2) // yields: 1, 3, 5, 7, 9 +func Iota[T Integer](start, stop T, step ...T) Seq[T] { + stepValue := T(1) + if len(step) > 0 { + stepValue = step[0] + } + + return func(yield func(T) bool) { + if stepValue == 0 { + return + } + + if stepValue > 0 { + for i := start; i < stop; i += stepValue { + if !yield(i) { + return + } + } + } else { + for i := start; i > stop; i += stepValue { + if !yield(i) { + return + } + } + } + } +} + +// IotaInclusive generates a sequence of numbers from start to stop (both inclusive) with the given step. +// If no step is provided, defaults to 1. +// +// Example: +// +// iter.IotaInclusive(1, 5) // yields: 1, 2, 3, 4, 5 +// iter.IotaInclusive(1, 9, 2) // yields: 1, 3, 5, 7, 9 +func IotaInclusive[T Integer](start, stop T, step ...T) Seq[T] { + stepValue := T(1) + if len(step) > 0 { + stepValue = step[0] + } + + return func(yield func(T) bool) { + if stepValue == 0 { + return + } + + if stepValue > 0 { + for i := start; i <= stop; i += stepValue { + if !yield(i) { + return + } + } + } else { + for i := start; i >= stop; i += stepValue { + if !yield(i) { + return + } + } + } + } +} + +// Once creates a sequence that yields a single value. +// +// Example: +// +// s := iter.Once(42) // yields: 42 +func Once[T any](value T) Seq[T] { + return func(yield func(T) bool) { + yield(value) + } +} + +// OnceWith creates a sequence that yields a single value from a function. +// +// Example: +// +// s := iter.OnceWith(func() int { return rand.Int() }) +func OnceWith[T any](f func() T) Seq[T] { + return func(yield func(T) bool) { + yield(f()) + } +} + +// Empty creates an empty sequence. +// +// Example: +// +// s := iter.Empty[int]() // yields nothing +func Empty[T any]() Seq[T] { return func(func(T) bool) {} } + +// Repeat creates an infinite sequence that repeats the given value. +// +// Example: +// +// s := iter.Take(iter.Repeat(42), 3) // yields: 42, 42, 42 +func Repeat[T any](value T) Seq[T] { + return func(yield func(T) bool) { + for { + if !yield(value) { + return + } + } + } +} + +// RepeatWith creates an infinite sequence by repeatedly calling a function. +// +// Example: +// +// s := iter.Take(iter.RepeatWith(func() int { return rand.Int() }), 3) +func RepeatWith[T any](f func() T) Seq[T] { + return func(yield func(T) bool) { + for { + if !yield(f()) { + return + } + } + } +} diff --git a/backend/vendor/github.com/enetx/iter/seq.go b/backend/vendor/github.com/enetx/iter/seq.go new file mode 100644 index 0000000..71ccd8e --- /dev/null +++ b/backend/vendor/github.com/enetx/iter/seq.go @@ -0,0 +1,268 @@ +package iter + +// Next extracts the first element from the sequence and returns the remaining sequence. +// Returns (value, remainingSeq, true) if an element exists, or (zero, nil, false) if empty. +// This is similar to Rust's Iterator::next() method. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// val, rest, ok := iter.Next(s) +// // val = 1, ok = true +// // rest yields: 2, 3, 4, 5 +// +// val2, rest2, ok2 := iter.Next(rest) +// // val2 = 2, ok2 = true +// // rest2 yields: 3, 4, 5 +func Next[T any](s Seq[T]) (T, Seq[T], bool) { + var first T + found := false + consumed := false + + s(func(v T) bool { + if !consumed { + first = v + found = true + consumed = true + return false + } + return true + }) + + if !found { + return first, nil, false + } + + remaining := func(yield func(T) bool) { + skip := true + s(func(v T) bool { + if skip { + skip = false + return true + } + return yield(v) + }) + } + + return first, remaining, true +} + +// First returns the first element from the sequence. +// Returns (value, true) if an element exists, or (zero, false) if empty. +// This is similar to Rust's Iterator::first() method. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// value, ok := iter.First(s) // 1, true +func First[T any](s Seq[T]) (T, bool) { + var result T + found := false + s(func(v T) bool { + result = v + found = true + return false + }) + return result, found +} + +// Last returns the last element from the sequence. +// Returns (value, true) if an element exists, or (zero, false) if empty. +// This is similar to Rust's Iterator::last() method. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// value, ok := iter.Last(s) // 5, true +func Last[T any](s Seq[T]) (T, bool) { + var result T + found := false + s(func(v T) bool { + result = v + found = true + return true + }) + return result, found +} + +// ForEach applies a function to each element in the sequence. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3}) +// iter.ForEach(s, func(x int) { fmt.Println(x) }) +func ForEach[T any](s Seq[T], fn func(T)) { + s(func(v T) bool { fn(v); return true }) +} + +// Count returns the number of elements in the sequence. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3}) +// count := iter.Count(s) // 3 +func Count[T any](s Seq[T]) int { + count := 0 + s(func(T) bool { + count++ + return true + }) + return count +} + +// Range applies a function to each element until it returns false. +// This is the same as the sequence's yield function. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// iter.Range(s, func(x int) bool { +// fmt.Println(x) +// return x != 3 // Stop at 3 +// }) +func Range[T any](s Seq[T], fn func(T) bool) { s(fn) } + +// Take returns the first n elements of the sequence. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// iter.Take(s, 3) // yields: 1, 2, 3 +func Take[T any](s Seq[T], n int) Seq[T] { + return func(yield func(T) bool) { + if n <= 0 { + return + } + count := 0 + s(func(v T) bool { + if count >= n { + return false + } + count++ + return yield(v) + }) + } +} + +// Skip skips the first n elements and returns the rest. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// iter.Skip(s, 2) // yields: 3, 4, 5 +func Skip[T any](s Seq[T], n int) Seq[T] { + return func(yield func(T) bool) { + if n <= 0 { + s(yield) + return + } + count := 0 + s(func(v T) bool { + if count < n { + count++ + return true + } + return yield(v) + }) + } +} + +// StepBy returns every nth element from the sequence. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5, 6}) +// iter.StepBy(s, 2) // yields: 1, 3, 5 +func StepBy[T any](s Seq[T], step int) Seq[T] { + return func(yield func(T) bool) { + if step <= 0 { + return + } + index := 0 + s(func(v T) bool { + if index%step == 0 { + if !yield(v) { + return false + } + } + index++ + return true + }) + } +} + +// TakeWhile yields elements while the predicate returns true. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// iter.TakeWhile(s, func(x int) bool { return x < 4 }) // yields: 1, 2, 3 +func TakeWhile[T any](s Seq[T], pred func(T) bool) Seq[T] { + return func(yield func(T) bool) { + s(func(v T) bool { + if !pred(v) { + return false + } + return yield(v) + }) + } +} + +// SkipWhile skips elements while the predicate returns true, then yields the rest. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// iter.SkipWhile(s, func(x int) bool { return x < 3 }) // yields: 3, 4, 5 +func SkipWhile[T any](s Seq[T], pred func(T) bool) Seq[T] { + return func(yield func(T) bool) { + skipping := true + s(func(v T) bool { + if skipping && pred(v) { + return true + } + skipping = false + return yield(v) + }) + } +} + +// Nth returns the nth element (0-indexed) from the sequence. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// value, ok := iter.Nth(s, 2) // 3, true +func Nth[T any](s Seq[T], n int) (T, bool) { + var result T + found := false + index := 0 + s(func(v T) bool { + if index == n { + result = v + found = true + return false + } + index++ + return true + }) + return result, found +} + +// Contains checks if the sequence contains the given value. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3}) +// has := iter.Contains(s, 2) // true +func Contains[T comparable](s Seq[T], x T) bool { + found := false + s(func(v T) bool { + if v == x { + found = true + return false + } + return true + }) + return found +} diff --git a/backend/vendor/github.com/enetx/iter/seq2.go b/backend/vendor/github.com/enetx/iter/seq2.go new file mode 100644 index 0000000..0d49e77 --- /dev/null +++ b/backend/vendor/github.com/enetx/iter/seq2.go @@ -0,0 +1,470 @@ +package iter + +import "slices" + +// Next2 extracts the first key-value pair from the sequence and returns the remaining sequence. +// Returns (key, value, remainingSeq, true) if a pair exists, or (zeroK, zeroV, nil, false) if empty. +// This is similar to Rust's Iterator::next() method for key-value pairs. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "b", 3: "c"}) +// k, v, rest, ok := iter.Next2(s) +// // k = 1, v = "a", ok = true (order not guaranteed for maps) +// // rest yields remaining pairs +// +// k2, v2, rest2, ok2 := iter.Next2(rest) +// // k2 = 2, v2 = "b", ok2 = true +// // rest2 yields remaining pairs +func Next2[K, V any](s Seq2[K, V]) (K, V, Seq2[K, V], bool) { + var firstK K + var firstV V + found := false + consumed := false + + s(func(k K, v V) bool { + if !consumed { + firstK = k + firstV = v + found = true + consumed = true + return false + } + return true + }) + + if !found { + return firstK, firstV, nil, false + } + + remaining := func(yield func(K, V) bool) { + skip := true + s(func(k K, v V) bool { + if skip { + skip = false + return true + } + return yield(k, v) + }) + } + + return firstK, firstV, remaining, true +} + +// First2 returns the first key-value pair from the sequence. +// Returns (key, value, true) if a pair exists, or (zeroK, zeroV, false) if empty. +// This is similar to Rust's Iterator::first() method for key-value pairs. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "b", 3: "c"}) +// k, v, ok := iter.First2(s) // might return: 1, "a", true +func First2[K, V any](s Seq2[K, V]) (K, V, bool) { + var resultK K + var resultV V + found := false + s(func(k K, v V) bool { + resultK = k + resultV = v + found = true + return false + }) + return resultK, resultV, found +} + +// Last2 returns the last key-value pair from the sequence. +// Returns (key, value, true) if a pair exists, or (zeroK, zeroV, false) if empty. +// This is similar to Rust's Iterator::last() method for key-value pairs. +// +// Example: +// +// pairs := []Pair[int, string]{{1, "a"}, {2, "b"}, {3, "c"}} +// s := iter.FromPairs(pairs) +// k, v, ok := iter.Last2(s) // 3, "c", true +func Last2[K, V any](s Seq2[K, V]) (K, V, bool) { + var resultK K + var resultV V + found := false + s(func(k K, v V) bool { + resultK = k + resultV = v + found = true + return true + }) + return resultK, resultV, found +} + +// ForEach2 applies a function to each key-value pair in the sequence. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "b"}) +// iter.ForEach2(s, func(k int, v string) { fmt.Printf("%d: %s\n", k, v) }) +func ForEach2[K, V any](s Seq2[K, V], fn func(K, V)) { + s(func(k K, v V) bool { fn(k, v); return true }) +} + +// Count2 returns the number of key-value pairs in the sequence. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "b"}) +// count := iter.Count2(s) // 2 +func Count2[K, V any](s Seq2[K, V]) int { + count := 0 + s(func(K, V) bool { count++; return true }) + return count +} + +// Range2 applies a function to each key-value pair until it returns false. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "b", 3: "c"}) +// iter.Range2(s, func(k int, v string) bool { +// fmt.Printf("%d: %s\n", k, v) +// return k != 2 // Stop at key 2 +// }) +func Range2[K, V any](s Seq2[K, V], fn func(K, V) bool) { s(fn) } + +// Map2 applies a function to each key-value pair, producing a new Seq2. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "b"}) +// iter.Map2(s, func(k int, v string) (int, string) { +// return k*10, strings.ToUpper(v) +// }) // yields: (10, "A"), (20, "B") +func Map2[K, V, K2, V2 any](s Seq2[K, V], f func(K, V) (K2, V2)) Seq2[K2, V2] { + return func(yield func(K2, V2) bool) { + s(func(k K, v V) bool { + k2, v2 := f(k, v) + return yield(k2, v2) + }) + } +} + +// Filter2 returns a new Seq2 containing only pairs that satisfy the predicate. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "bb", 3: "ccc"}) +// iter.Filter2(s, func(k int, v string) bool { return len(v) > 1 }) +// // yields pairs where value length > 1 +func Filter2[K, V any](s Seq2[K, V], p func(K, V) bool) Seq2[K, V] { + return func(yield func(K, V) bool) { + s(func(k K, v V) bool { + if p(k, v) { + return yield(k, v) + } + return true + }) + } +} + +// Exclude2 returns a new Seq2 containing only pairs that do not satisfy the predicate. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "bb", 3: "ccc"}) +// iter.Exclude2(s, func(k int, v string) bool { return len(v) > 1 }) +// // yields pairs where value length <= 1 +func Exclude2[K, V any](s Seq2[K, V], p func(K, V) bool) Seq2[K, V] { + return func(yield func(K, V) bool) { + s(func(k K, v V) bool { + if !p(k, v) { + return yield(k, v) + } + return true + }) + } +} + +// FilterMap2 applies a function to each key-value pair and filters out None results. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "bb", 3: "ccc"}) +// iter.FilterMap2(s, func(k int, v string) (Pair[int, string], bool) { +// if len(v) > 1 { +// return Pair[int, string]{k*10, strings.ToUpper(v)}, true +// } +// return Pair[int, string]{}, false +// }) // yields: (20, "BB"), (30, "CCC") +func FilterMap2[K, V, K2, V2 any](s Seq2[K, V], f func(K, V) (Pair[K2, V2], bool)) Seq2[K2, V2] { + return func(yield func(K2, V2) bool) { + s(func(k K, v V) bool { + if pair, ok := f(k, v); ok { + return yield(pair.Key, pair.Value) + } + return true + }) + } +} + +// Find2 returns the first key-value pair that satisfies the predicate. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "bb", 3: "ccc"}) +// k, v, ok := iter.Find2(s, func(k int, v string) bool { return len(v) > 1 }) +// // might return: 2, "bb", true +func Find2[K, V any](s Seq2[K, V], p func(K, V) bool) (K, V, bool) { + var resultK K + var resultV V + found := false + s(func(k K, v V) bool { + if p(k, v) { + resultK = k + resultV = v + found = true + return false + } + return true + }) + return resultK, resultV, found +} + +// Keys extracts all keys from the Seq2 into a Seq. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "b"}) +// iter.Keys(s) // yields: 1, 2 (order not guaranteed) +func Keys[K, V any](s Seq2[K, V]) Seq[K] { + return func(y func(K) bool) { s(func(k K, _ V) bool { return y(k) }) } +} + +// Values extracts all values from the Seq2 into a Seq. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "b"}) +// iter.Values(s) // yields: "a", "b" (order not guaranteed) +func Values[K, V any](s Seq2[K, V]) Seq[V] { + return func(y func(V) bool) { s(func(_ K, v V) bool { return y(v) }) } +} + +// OrderByKey sorts the sequence by keys using the comparison function. +func OrderByKey[K, V any](s Seq2[K, V], less func(a, b K) bool) Seq2[K, V] { + buf := ToPairs(s) + slices.SortFunc(buf, func(a, b Pair[K, V]) int { + switch { + case less(a.Key, b.Key): + return -1 + case less(b.Key, a.Key): + return 1 + default: + return 0 + } + }) + return FromPairs(buf) +} + +// OrderByValue sorts the sequence by values using the comparison function. +func OrderByValue[K, V any](s Seq2[K, V], less func(a, b V) bool) Seq2[K, V] { + buf := ToPairs(s) + slices.SortFunc(buf, func(a, b Pair[K, V]) int { + switch { + case less(a.Value, b.Value): + return -1 + case less(b.Value, a.Value): + return 1 + default: + return 0 + } + }) + return FromPairs(buf) +} + +// Take2 returns the first n key-value pairs of the sequence. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "b", 3: "c"}) +// iter.Take2(s, 2) // yields first 2 pairs +func Take2[K, V any](s Seq2[K, V], n int) Seq2[K, V] { + return func(yield func(K, V) bool) { + if n <= 0 { + return + } + count := 0 + s(func(k K, v V) bool { + if count >= n { + return false + } + count++ + return yield(k, v) + }) + } +} + +// Skip2 skips the first n key-value pairs and returns the rest. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "b", 3: "c"}) +// iter.Skip2(s, 1) // yields all pairs except the first +func Skip2[K, V any](s Seq2[K, V], n int) Seq2[K, V] { + return func(yield func(K, V) bool) { + if n <= 0 { + s(yield) + return + } + count := 0 + s(func(k K, v V) bool { + if count < n { + count++ + return true + } + return yield(k, v) + }) + } +} + +// StepBy2 returns every nth key-value pair from the sequence. +// +// Example: +// +// pairs := []Pair[int, string]{{1, "a"}, {2, "b"}, {3, "c"}, {4, "d"}} +// s := iter.FromPairs(pairs) +// iter.StepBy2(s, 2) // yields: (1, "a"), (3, "c") +func StepBy2[K, V any](s Seq2[K, V], step int) Seq2[K, V] { + return func(yield func(K, V) bool) { + if step <= 0 { + return + } + index := 0 + s(func(k K, v V) bool { + if index%step == 0 { + if !yield(k, v) { + return false + } + } + index++ + return true + }) + } +} + +// SortBy2 sorts the sequence using the provided comparison function on Pair pairs. +func SortBy2[K, V any](s Seq2[K, V], less func(a, b Pair[K, V]) bool) Seq2[K, V] { + buf := ToPairs(s) + slices.SortFunc(buf, func(a, b Pair[K, V]) int { + if less(a, b) { + return -1 + } + if less(b, a) { + return 1 + } + return 0 + }) + return FromPairs(buf) +} + +// Inspect2 applies a function to each key-value pair for side effects while passing through the original pairs. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "b"}) +// iter.Inspect2(s, func(k int, v string) { fmt.Printf("Processing: %d=%s\n", k, v) }) +func Inspect2[K, V any](s Seq2[K, V], fn func(K, V)) Seq2[K, V] { + return func(yield func(K, V) bool) { s(func(k K, v V) bool { fn(k, v); return yield(k, v) }) } +} + +// Any2 returns true if any key-value pair satisfies the predicate. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "bb"}) +// hasLongValue := iter.Any2(s, func(k int, v string) bool { return len(v) > 1 }) // true +func Any2[K, V any](s Seq2[K, V], p func(K, V) bool) bool { + found := false + s(func(k K, v V) bool { + if p(k, v) { + found = true + return false + } + return true + }) + return found +} + +// All2 returns true if all key-value pairs satisfy the predicate. +// +// Example: +// +// s := iter.FromMap(map[int]string{1: "a", 2: "b"}) +// allShortValues := iter.All2(s, func(k int, v string) bool { return len(v) == 1 }) // true +func All2[K, V any](s Seq2[K, V], p func(K, V) bool) bool { + all := true + s(func(k K, v V) bool { + if !p(k, v) { + all = false + return false + } + return true + }) + return all +} + +// Fold2 reduces the Seq2 to a single value using an accumulator. +// +// Example: +// +// s := iter.FromMap(map[int]int{1: 10, 2: 20, 3: 30}) +// sum := iter.Fold2(s, 0, func(acc, k, v int) int { return acc + k + v }) // 66 +func Fold2[K, V, A any](s Seq2[K, V], acc A, f func(A, K, V) A) A { + s(func(k K, v V) bool { acc = f(acc, k, v); return true }) + return acc +} + +// Reduce2 reduces the Seq2 to a single Pair pair. +// Returns false if the sequence is empty. +// +// Example: +// +// s := iter.FromMap(map[int]int{1: 10, 2: 20}) +// result, ok := iter.Reduce2(s, func(a, b Pair[int, int]) Pair[int, int] { +// return Pair[int, int]{a.Key + b.Key, a.Value + b.Value} +// }) // Pair{3, 30}, true +func Reduce2[K, V any](s Seq2[K, V], f func(Pair[K, V], Pair[K, V]) Pair[K, V]) (Pair[K, V], bool) { + var result Pair[K, V] + first := true + s(func(k K, v V) bool { + kv := Pair[K, V]{k, v} + if first { + result = kv + first = false + } else { + result = f(result, kv) + } + return true + }) + return result, !first +} + +// Nth2 returns the nth key-value pair (0-indexed) from the sequence. +// +// Example: +// +// pairs := []Pair[int, string]{{1, "a"}, {2, "b"}, {3, "c"}} +// s := iter.FromPairs(pairs) +// k, v, ok := iter.Nth2(s, 1) // 2, "b", true +func Nth2[K, V any](s Seq2[K, V], n int) (K, V, bool) { + var resultK K + var resultV V + found := false + index := 0 + s(func(k K, v V) bool { + if index == n { + resultK = k + resultV = v + found = true + return false + } + index++ + return true + }) + return resultK, resultV, found +} diff --git a/backend/vendor/github.com/enetx/iter/sources.go b/backend/vendor/github.com/enetx/iter/sources.go new file mode 100644 index 0000000..863149f --- /dev/null +++ b/backend/vendor/github.com/enetx/iter/sources.go @@ -0,0 +1,96 @@ +package iter + +// FromSlice creates a sequence that iterates over the given slice in forward order. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3}) +// iter.ForEach(s, func(x int) { fmt.Println(x) }) +// // Output: +// // 1 +// // 2 +// // 3 +func FromSlice[T any](sl []T) Seq[T] { + return func(yield func(T) bool) { + for _, v := range sl { + if !yield(v) { + return + } + } + } +} + +// FromSliceReverse creates a sequence that iterates over the given slice in reverse order. +// Note: This does NOT allocate or collect; it walks the provided slice backwards. +// +// Example: +// +// s := iter.FromSliceReverse([]int{1, 2, 3}) +// iter.ForEach(s, func(x int) { fmt.Println(x) }) +// // Output: +// // 3 +// // 2 +// // 1 +func FromSliceReverse[T any](sl []T) Seq[T] { + return func(yield func(T) bool) { + for i := len(sl) - 1; i >= 0; i-- { + if !yield(sl[i]) { + return + } + } + } +} + +// FromChan creates a sequence from a channel. +// The sequence will stop when the channel is closed. +// +// Example: +// +// ch := make(chan int) +// go func() { +// defer close(ch) +// for i := 0; i < 3; i++ { ch <- i } +// }() +// s := iter.FromChan(ch) +func FromChan[T any](ch <-chan T) Seq[T] { + return func(yield func(T) bool) { + for v := range ch { + if !yield(v) { + return + } + } + } +} + +// FromMap creates a sequence from a map. +// The order of key-value pairs is not guaranteed. +// +// Example: +// +// m := map[int]string{1: "a", 2: "b", 3: "c"} +// s := iter.FromMap(m) +func FromMap[K comparable, V any](m map[K]V) Seq2[K, V] { + return func(yield func(K, V) bool) { + for k, v := range m { + if !yield(k, v) { + return + } + } + } +} + +// FromPairs creates a Seq2 from a slice of key-value pairs. +// +// Example: +// +// pairs := []Pair[int, string]{{1, "a"}, {2, "b"}} +// s := iter.FromPairs(pairs) +func FromPairs[K, V any](pairs []Pair[K, V]) Seq2[K, V] { + return func(yield func(K, V) bool) { + for _, p := range pairs { + if !yield(p.Key, p.Value) { + return + } + } + } +} diff --git a/backend/vendor/github.com/enetx/iter/transform.go b/backend/vendor/github.com/enetx/iter/transform.go new file mode 100644 index 0000000..8719e21 --- /dev/null +++ b/backend/vendor/github.com/enetx/iter/transform.go @@ -0,0 +1,182 @@ +package iter + +// Map applies a function to each element, producing a new sequence of the same type. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3}) +// iter.Map(s, func(x int) int { return x * 2 }) // yields: 2, 4, 6 +func Map[T any](s Seq[T], f func(T) T) Seq[T] { + return func(yield func(T) bool) { s(func(v T) bool { return yield(f(v)) }) } +} + +// MapTo applies a function to each element, producing a new sequence of potentially different type. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3}) +// iter.MapTo(s, func(x int) string { return fmt.Sprintf("%d", x) }) // yields: "1", "2", "3" +func MapTo[T, U any](s Seq[T], f func(T) U) Seq[U] { + return func(yield func(U) bool) { s(func(v T) bool { return yield(f(v)) }) } +} + +// Inspect applies a function to each element for side effects while passing through the original values. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3}) +// iter.Inspect(s, func(x int) { fmt.Printf("Processing: %d\n", x) }) +func Inspect[T any](s Seq[T], fn func(T)) Seq[T] { + return func(yield func(T) bool) { s(func(v T) bool { fn(v); return yield(v) }) } +} + +// Filter returns a new sequence containing only elements that satisfy the predicate. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// iter.Filter(s, func(x int) bool { return x%2 == 0 }) // yields: 2, 4 +func Filter[T any](s Seq[T], p func(T) bool) Seq[T] { + return func(yield func(T) bool) { + s(func(v T) bool { + if p(v) { + return yield(v) + } + return true + }) + } +} + +// Exclude returns a new sequence containing only elements that do not satisfy the predicate. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4, 5}) +// iter.Exclude(s, func(x int) bool { return x%2 == 0 }) // yields: 1, 3, 5 +func Exclude[T any](s Seq[T], p func(T) bool) Seq[T] { + return func(yield func(T) bool) { + s(func(v T) bool { + if !p(v) { + return yield(v) + } + return true + }) + } +} + +// FilterMap applies a function to each element and filters out None results. +// +// Example: +// +// s := iter.FromSlice([]string{"1", "2", "abc", "3"}) +// iter.FilterMap(s, func(s string) (int, bool) { +// if i, err := strconv.Atoi(s); err == nil { +// return i, true +// } +// return 0, false +// }) // yields: 1, 2, 3 +func FilterMap[T, U any](s Seq[T], f func(T) (U, bool)) Seq[U] { + return func(yield func(U) bool) { + s(func(v T) bool { + if u, ok := f(v); ok { + return yield(u) + } + return true + }) + } +} + +// MapWhile applies a function to elements while it returns Some, stopping at the first None. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, -1, 4}) +// iter.MapWhile(s, func(x int) (int, bool) { +// if x > 0 { return x * 2, true } +// return 0, false +// }) // yields: 2, 4 +func MapWhile[T, U any](s Seq[T], f func(T) (U, bool)) Seq[U] { + return func(yield func(U) bool) { + s(func(v T) bool { + if u, ok := f(v); ok { + return yield(u) + } + return false + }) + } +} + +// Enumerate returns a sequence of (index, value) pairs starting from the given start index. +// +// Example: +// +// s := iter.FromSlice([]string{"a", "b", "c"}) +// iter.Enumerate(s, 0) // yields: (0, "a"), (1, "b"), (2, "c") +func Enumerate[T any](s Seq[T], start int) Seq2[int, T] { + return func(yield func(int, T) bool) { + index := start + s(func(v T) bool { + result := yield(index, v) + index++ + return result + }) + } +} + +// Scan is similar to Fold, but emits intermediate accumulator values. +// +// Example: +// +// s := iter.FromSlice([]int{1, 2, 3, 4}) +// iter.Scan(s, 0, func(acc, x int) int { return acc + x }) // yields: 1, 3, 6, 10 +func Scan[T, S any](s Seq[T], init S, f func(S, T) S) Seq[S] { + return func(yield func(S) bool) { + acc := init + s(func(v T) bool { + acc = f(acc, v) + return yield(acc) + }) + } +} + +// Unique returns a sequence with all duplicate elements removed. +// Works with any type by using any as the key. +// +// Example: +// +// s := iter.FromSlice([]int{1, 1, 2, 2, 3, 1}) +// iter.Unique(s) // yields: 1, 2, 3 +func Unique[T any](s Seq[T]) Seq[T] { + return func(yield func(T) bool) { + seen := make(map[any]struct{}) + s(func(v T) bool { + if _, exists := seen[any(v)]; !exists { + seen[any(v)] = struct{}{} + return yield(v) + } + return true + }) + } +} + +// UniqueBy returns a sequence with consecutive elements removed where the key function returns the same value. +// +// Example: +// +// s := iter.FromSlice([]string{"aa", "bb", "a", "ccc"}) +// iter.UniqueBy(s, func(s string) int { return len(s) }) // yields: "aa", "a", "ccc" +func UniqueBy[T any, K comparable](s Seq[T], key func(T) K) Seq[T] { + return func(yield func(T) bool) { + var prevKey K + first := true + s(func(v T) bool { + k := key(v) + if first || k != prevKey { + prevKey = k + first = false + return yield(v) + } + return true + }) + } +} diff --git a/backend/vendor/github.com/enetx/iter/types.go b/backend/vendor/github.com/enetx/iter/types.go new file mode 100644 index 0000000..d66cebf --- /dev/null +++ b/backend/vendor/github.com/enetx/iter/types.go @@ -0,0 +1,27 @@ +package iter + +import "iter" + +// Seq represents a single-value iterator sequence. +// It calls the yield function for each element in the sequence. +// If yield returns false, the iteration should stop. +type Seq[T any] iter.Seq[T] + +// Seq2 represents a two-value iterator sequence (typically key-value pairs). +// It calls the yield function for each pair in the sequence. +// If yield returns false, the iteration should stop. +type Seq2[K, V any] iter.Seq2[K, V] + +// Pair represents a key-value pair. +// Used for converting between Seq2 and slice representations. +type Pair[K, V any] struct { + Key K + Value V +} + +// Integer defines numeric types that can be used with Iota generators. +// Supports all signed and unsigned integer types. +type Integer interface { + ~int | ~int8 | ~int16 | ~int32 | ~int64 | + ~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr +} diff --git a/backend/vendor/github.com/enetx/surf/LICENSE b/backend/vendor/github.com/enetx/surf/LICENSE new file mode 100644 index 0000000..4b5e7e1 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2024 enetx + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/backend/vendor/github.com/enetx/surf/README.md b/backend/vendor/github.com/enetx/surf/README.md new file mode 100644 index 0000000..d2c085a --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/README.md @@ -0,0 +1,943 @@ +

+ +

+ +

Surf - Advanced HTTP Client for Go

+ +[![Go Reference](https://pkg.go.dev/badge/github.com/enetx/surf.svg)](https://pkg.go.dev/github.com/enetx/surf) +[![Go Report Card](https://goreportcard.com/badge/github.com/enetx/surf)](https://goreportcard.com/report/github.com/enetx/surf) +[![Coverage Status](https://coveralls.io/repos/github/enetx/surf/badge.svg?branch=main&service=github)](https://coveralls.io/github/enetx/surf?branch=main) +[![Go](https://github.com/enetx/surf/actions/workflows/go.yml/badge.svg)](https://github.com/enetx/surf/actions/workflows/go.yml) +[![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/enetx/surf) + +

Surf is a powerful, feature-rich HTTP client library for Go that makes working with HTTP requests intuitive and enjoyable. With advanced features like browser impersonation, JA3/JA4 fingerprinting, and comprehensive middleware support, Surf provides everything you need for modern web interactions.

+ +## ✨ Key Features + +### 🎭 **Browser Impersonation** +- **Chrome & Firefox Support**: Accurately mimic Chrome v142 and Firefox v144 browser fingerprints +- **Platform Diversity**: Impersonate Windows, macOS, Linux, Android, and iOS devices +- **TLS Fingerprinting**: Full JA3/JA4 fingerprint customization for enhanced privacy +- **Automatic Headers**: Proper header ordering and browser-specific values +- **WebKit Form Boundaries**: Accurate multipart form boundary generation matching real browsers + +### 🔒 **Advanced TLS & Security** +- **Custom JA3/JA4**: Configure precise TLS fingerprints with `HelloID` and `HelloSpec` +- **HTTP/3 Support**: Full HTTP/3 over QUIC with complete browser-specific QUIC fingerprinting +- **JA4QUIC Fingerprinting**: Complete QUIC transport parameter fingerprinting for Chrome and Firefox +- **HTTP/2 & HTTP/3**: Full HTTP/2 support with customizable settings (SETTINGS frame, window size, priority) +- **Ordered Headers**: Browser-accurate header ordering for perfect fingerprint evasion +- **Certificate Pinning**: Custom TLS certificate validation +- **DNS-over-TLS**: Enhanced privacy with DoT support +- **Proxy Support**: HTTP, HTTPS, and SOCKS5 proxy configurations with UDP support for HTTP/3 + +### 🚀 **Performance & Reliability** +- **Connection Pooling**: Efficient connection reuse with singleton pattern +- **Automatic Retries**: Configurable retry logic with custom status codes +- **Response Caching**: Built-in body caching for repeated access +- **Streaming Support**: Efficient handling of large responses and SSE +- **Compression**: Automatic decompression of gzip, deflate, brotli, and zstd responses +- **Keep-Alive**: Persistent connections with configurable parameters + +### 🛠️ **Developer Experience** +- **Standard Library Compatible**: Convert to `net/http.Client` for third-party library integration +- **Fluent API**: Chainable methods for elegant code +- **Middleware System**: Extensible request/response/client middleware with priority support +- **Type Safety**: Strong typing with generics support via [enetx/g](https://github.com/enetx/g) +- **Debug Mode**: Comprehensive request/response debugging +- **Error Handling**: Result type pattern for better error management +- **Context Support**: Full context.Context integration for cancellation and timeouts + +## 📦 Installation + +```bash +go get -u github.com/enetx/surf +``` + +**Required Go version:** 1.24+ + +## 🔄 Standard Library Compatibility + +Surf provides seamless integration with Go's standard `net/http` package, allowing you to use Surf's advanced features with any library that expects a standard `*http.Client`. + +```go +// Create a Surf client with advanced features +surfClient := surf.NewClient(). + Builder(). + Impersonate().Chrome(). + Session(). + Build() + +// Convert to standard net/http.Client +stdClient := surfClient.Std() + +// Use with any third-party library +// Example: AWS SDK, Google APIs, OpenAI client, etc. +resp, err := stdClient.Get("https://api.example.com") +``` + +**Preserved Features When Using Std():** +- ✅ JA3/TLS fingerprinting +- ✅ HTTP/2 settings +- ✅ HTTP/3 & QUIC fingerprinting +- ✅ Browser impersonation headers +- ✅ Ordered headers +- ✅ Cookies and sessions +- ✅ Proxy configuration +- ✅ Custom headers and User-Agent +- ✅ Timeout settings +- ✅ Redirect policies +- ✅ Request/Response middleware + +**Limitations with Std():** +- ❌ Retry logic (implement at application level) +- ❌ Response body caching +- ❌ Remote address tracking +- ❌ Request timing information + +## 🚀 Quick Start + +### Basic GET Request + +```go +package main + +import ( + "fmt" + "log" + "github.com/enetx/surf" +) + +func main() { + resp := surf.NewClient().Get("https://api.github.com/users/github").Do() + if resp.IsErr() { + log.Fatal(resp.Err()) + } + + fmt.Println(resp.Ok().Body.String()) +} +``` + +### JSON Response Handling + +```go +type User struct { + Name string `json:"name"` + Company string `json:"company"` + Location string `json:"location"` +} + +resp := surf.NewClient().Get("https://api.github.com/users/github").Do() +if resp.IsOk() { + var user User + resp.Ok().Body.JSON(&user) + fmt.Printf("User: %+v\n", user) +} +``` + +## 🎭 Browser Impersonation + +### Chrome Impersonation + +```go +client := surf.NewClient(). + Builder(). + Impersonate(). + Chrome(). // Latest Chrome v142 + Build() + +resp := client.Get("https://example.com").Do() +``` + +### Firefox with Random OS + +```go +client := surf.NewClient(). + Builder(). + Impersonate(). + RandomOS(). // Randomly selects Windows, macOS, Linux, Android, or iOS + FireFox(). // Latest Firefox v144 + Build() +``` + +### Platform-Specific Impersonation + +```go +// iOS Chrome +client := surf.NewClient(). + Builder(). + Impersonate(). + IOS(). + Chrome(). + Build() + +// Android Chrome +client := surf.NewClient(). + Builder(). + Impersonate(). + Android(). + Chrome(). + Build() +``` + +## 🚀 HTTP/3 & Complete QUIC Fingerprinting + +### Chrome HTTP/3 with Automatic Detection + +```go +// Automatic HTTP/3 with Chrome fingerprinting +client := surf.NewClient(). + Builder(). + Impersonate().Chrome(). + HTTP3(). // Auto-detects Chrome and applies appropriate QUIC settings + Build() + +resp := client.Get("https://cloudflare-quic.com/").Do() +if resp.IsOk() { + fmt.Printf("Protocol: %s\n", resp.Ok().Proto) // HTTP/3.0 +} +``` + +### Firefox HTTP/3 + +```go +// Firefox with HTTP/3 fingerprinting +client := surf.NewClient(). + Builder(). + Impersonate().FireFox(). + HTTP3(). // Auto-detects Firefox and applies Firefox QUIC settings + Build() + +resp := client.Get("https://cloudflare-quic.com/").Do() +``` + +### Manual HTTP/3 Configuration + +```go +// Custom QUIC fingerprint with Chrome settings +client := surf.NewClient(). + Builder(). + HTTP3Settings().Chrome().Set(). + Build() + +// Custom QUIC fingerprint with Firefox settings +client := surf.NewClient(). + Builder(). + HTTP3Settings().Firefox().Set(). + Build() + +// Custom QUIC ID +client := surf.NewClient(). + Builder(). + HTTP3Settings(). + SetQUICID(uquic.QUICChrome_115). + Set(). + Build() + +// Custom QUIC Spec +spec, _ := uquic.QUICID2Spec(uquic.QUICFirefox_116) +client := surf.NewClient(). + Builder(). + HTTP3Settings(). + SetQUICSpec(spec). + Set(). + Build() +``` + +### HTTP/3 with Complete Fingerprinting + +```go +// Combine TLS fingerprinting with HTTP/3 QUIC fingerprinting +client := surf.NewClient(). + Builder(). + JA().Chrome142(). // TLS fingerprint (JA3/JA4) + HTTP3Settings().Chrome().Set(). // Complete QUIC fingerprint (JA4QUIC) + Build() + +resp := client.Get("https://cloudflare-quic.com/").Do() +``` + +### HTTP/3 Compatibility & Fallbacks + +HTTP/3 automatically handles compatibility issues: + +```go +// With HTTP proxy - automatically falls back to HTTP/2 +client := surf.NewClient(). + Builder(). + Proxy("http://proxy:8080"). // HTTP proxies incompatible with HTTP/3 + HTTP3Settings().Chrome().Set(). // Will use HTTP/2 instead + Build() + +// With SOCKS5 proxy - HTTP/3 works over UDP +client := surf.NewClient(). + Builder(). + Proxy("socks5://127.0.0.1:1080"). // SOCKS5 UDP proxy supports HTTP/3 + HTTP3Settings().Chrome().Set(). // Will use HTTP/3 over SOCKS5 + Build() + +// With DNS settings - works seamlessly +client := surf.NewClient(). + Builder(). + DNS("8.8.8.8:53"). // Custom DNS works with HTTP/3 + HTTP3Settings().Chrome().Set(). + Build() + +// With DNS-over-TLS - works seamlessly +client := surf.NewClient(). + Builder(). + DNSOverTLS().Google(). // DoT works with HTTP/3 + HTTP3Settings().Chrome().Set(). + Build() +``` + +**Key HTTP/3 Features:** +- ✅ **Complete QUIC Fingerprinting**: Full Chrome and Firefox QUIC transport parameter matching +- ✅ **Header Ordering**: Perfect browser-like header sequence preservation +- ✅ **SOCKS5 UDP Support**: HTTP/3 works seamlessly over SOCKS5 UDP proxies +- ✅ **Automatic Fallback**: Smart fallback to HTTP/2 when HTTP proxies are configured +- ✅ **DNS Integration**: Custom DNS and DNS-over-TLS support +- ✅ **JA4QUIC Support**: Advanced QUIC fingerprinting with Initial Packet + TLS ClientHello +- ✅ **Order Independence**: `HTTP3()` works regardless of call order + +## 🔧 Advanced Configuration + +### Custom JA3 Fingerprint + +```go +// Use specific browser versions +client := surf.NewClient(). + Builder(). + JA(). + Chrome(). // Latest Chrome + Build() + + +// Randomized fingerprints for evasion +client := surf.NewClient(). + Builder(). + JA(). + Randomized(). // Random TLS fingerprint + Build() + +// With custom HelloID +client := surf.NewClient(). + Builder(). + JA(). + SetHelloID(utls.HelloChrome_Auto). + Build() + +// With custom HelloSpec +client := surf.NewClient(). + Builder(). + JA(). + SetHelloSpec(customSpec). + Build() +``` + +### HTTP/2 Configuration + +```go +client := surf.NewClient(). + Builder(). + HTTP2Settings(). + HeaderTableSize(65536). + EnablePush(0). + InitialWindowSize(6291456). + MaxHeaderListSize(262144). + ConnectionFlow(15663105). + Set(). + Build() +``` + +### HTTP/3 Configuration + +```go +// Automatic browser detection +client := surf.NewClient(). + Builder(). + Impersonate().Chrome(). + HTTP3(). + Build() + +// Manual configuration +client := surf.NewClient(). + Builder(). + HTTP3Settings().Chrome().Set(). + Build() +``` + +### Proxy Configuration + +```go +// Single proxy +client := surf.NewClient(). + Builder(). + Proxy("http://proxy.example.com:8080"). + Build() + +// Rotating proxies +proxies := []string{ + "http://proxy1.example.com:8080", + "http://proxy2.example.com:8080", + "socks5://proxy3.example.com:1080", +} + +client := surf.NewClient(). + Builder(). + Proxy(proxies). // Randomly selects from list + Build() +``` + +### SOCKS5 UDP Proxy Support +Surf supports HTTP/3 over SOCKS5 UDP proxies, combining the benefits of modern QUIC protocol with proxy functionality: + +```go +// HTTP/3 over SOCKS5 UDP proxy +client := surf.NewClient(). + Builder(). + Proxy("socks5://127.0.0.1:1080"). + Impersonate().Chrome(). + HTTP3(). // Uses HTTP/3 over SOCKS5 UDP + Build() + +// SOCKS5 with custom DNS resolution +client := surf.NewClient(). + Builder(). + DNS("8.8.8.8:53"). // Custom DNS resolver + Proxy("socks5://proxy:1080"). // SOCKS5 UDP proxy + HTTP3(). // HTTP/3 over SOCKS5 + Build() +``` + +## 🔌 Middleware System + +### Request Middleware + +```go +client := surf.NewClient(). + Builder(). + With(func(req *surf.Request) error { + req.AddHeaders("X-Custom-Header", "value") + fmt.Printf("Request to: %s\n", req.GetRequest().URL) + return nil + }). + Build() +``` + +### Response Middleware + +```go +client := surf.NewClient(). + Builder(). + With(func(resp *surf.Response) error { + fmt.Printf("Response status: %d\n", resp.StatusCode) + fmt.Printf("Response time: %v\n", resp.Time) + return nil + }). + Build() +``` + +### Client Middleware + +```go +client := surf.NewClient(). + Builder(). + With(func(client *surf.Client) { + // Modify client configuration + client.GetClient().Timeout = 30 * time.Second + }). + Build() +``` + +## 📤 Request Types + +### POST with JSON + +```go +user := map[string]string{ + "name": "John Doe", + "email": "john@example.com", +} + +resp := surf.NewClient(). + Post("https://api.example.com/users", user). + Do() +``` + +### Form Data + +```go +// Standard form data (field order not guaranteed) +formData := map[string]string{ + "username": "john", + "password": "secret", +} + +resp := surf.NewClient(). + Post("https://example.com/login", formData). + Do() + +// Ordered form data (preserves field insertion order) +orderedForm := g.NewMapOrd[string, string]() +orderedForm.Set("username", "john") +orderedForm.Set("password", "secret") +orderedForm.Set("remember_me", "true") + +resp := surf.NewClient(). + Post("https://example.com/login", orderedForm). + Do() +``` + +### File Upload + +```go +// Single file upload +resp := surf.NewClient(). + FileUpload( + "https://api.example.com/upload", + "file", // field name + "/path/to/file.pdf", // file path + ).Do() + +// With additional form fields +extraData := g.MapOrd[string, string]{ + "description": "Important document", + "category": "reports", +} + +resp := surf.NewClient(). + FileUpload( + "https://api.example.com/upload", + "file", + "/path/to/file.pdf", + extraData, + ).Do() +``` + +### Multipart Form + +```go +fields := g.NewMapOrd[g.String, g.String]() +fields.Set("field1", "value1") +fields.Set("field2", "value2") + +resp := surf.NewClient(). + Multipart("https://api.example.com/form", fields). + Do() +``` + +## 🔄 Session Management + +### Persistent Sessions + +```go +client := surf.NewClient(). + Builder(). + Session(). // Enable cookie jar + Build() + +// Login +client.Post("https://example.com/login", credentials).Do() + +// Subsequent requests will include session cookies +resp := client.Get("https://example.com/dashboard").Do() +``` + +### Manual Cookie Management + +```go +// Set cookies +cookies := []*http.Cookie{ + {Name: "session", Value: "abc123"}, + {Name: "preference", Value: "dark_mode"}, +} + +resp := surf.NewClient(). + Get("https://example.com"). + AddCookies(cookies...). + Do() + +// Get cookies from response +if resp.IsOk() { + for _, cookie := range resp.Ok().Cookies { + fmt.Printf("Cookie: %s = %s\n", cookie.Name, cookie.Value) + } +} +``` + +## 📊 Response Handling + +### Status Code Checking + +```go +resp := surf.NewClient().Get("https://api.example.com/data").Do() + +if resp.IsOk() { + switch { + case resp.Ok().StatusCode.IsSuccess(): + fmt.Println("Success!") + case resp.Ok().StatusCode.IsRedirect(): + fmt.Println("Redirected to:", resp.Ok().Location()) + case resp.Ok().StatusCode.IsClientError(): + fmt.Println("Client error:", resp.Ok().StatusCode) + case resp.Ok().StatusCode.IsServerError(): + fmt.Println("Server error:", resp.Ok().StatusCode) + } +} +``` + +### Body Processing + +```go +resp := surf.NewClient().Get("https://example.com/data").Do() +if resp.IsOk() { + body := resp.Ok().Body + + // As string + content := body.String() + + // As bytes + data := body.Bytes() + + // MD5 hash + hash := body.MD5() + + // UTF-8 conversion + utf8Content := body.UTF8() + + // Check content + if body.Contains("success") { + fmt.Println("Request succeeded!") + } + + // Save to file + err := body.Dump("response.html") +} +``` + +### Streaming Large Responses + +```go +resp := surf.NewClient().Get("https://example.com/large-file").Do() +if resp.IsOk() { + reader := resp.Ok().Body.Stream() + + scanner := bufio.NewScanner(reader) + for scanner.Scan() { + fmt.Println(scanner.Text()) + } +} +``` + +### Server-Sent Events (SSE) + +```go +resp := surf.NewClient().Get("https://example.com/events").Do() +if resp.IsOk() { + resp.Ok().Body.SSE(func(event *sse.Event) bool { + fmt.Printf("Event: %s, Data: %s\n", event.Name, event.Data) + return true // Continue reading (false to stop) + }) +} +``` + +## 🔍 Debugging + +### Request/Response Debugging + +```go +resp := surf.NewClient(). + Get("https://api.example.com"). + Do() + +if resp.IsOk() { + resp.Ok().Debug(). + Request(). // Show request details + Response(true). // Show response with body + Print() +} +``` + +### TLS Information + +```go +resp := surf.NewClient().Get("https://example.com").Do() +if resp.IsOk() { + if tlsInfo := resp.Ok().TLSGrabber(); tlsInfo != nil { + fmt.Printf("TLS Version: %s\n", tlsInfo.Version) + fmt.Printf("Cipher Suite: %s\n", tlsInfo.CipherSuite) + fmt.Printf("Server Name: %s\n", tlsInfo.ServerName) + + for _, cert := range tlsInfo.PeerCertificates { + fmt.Printf("Certificate CN: %s\n", cert.Subject.CommonName) + } + } +} +``` + +## ⚡ Performance Optimization + +### Connection Reuse with Singleton + +```go +// Create a reusable client +client := surf.NewClient(). + Builder(). + Singleton(). // Enable connection pooling + Impersonate(). + Chrome(). + Build() + +// Reuse for multiple requests +for i := 0; i < 100; i++ { + resp := client.Get("https://api.example.com/data").Do() + // Process response +} + +// Clean up when done +defer client.CloseIdleConnections() +``` + +### Response Caching + +```go +client := surf.NewClient(). + Builder(). + CacheBody(). // Enable body caching + Build() + +resp := client.Get("https://api.example.com/data").Do() +if resp.IsOk() { + // First access reads from network + data1 := resp.Ok().Body.Bytes() + + // Subsequent accesses use cache + data2 := resp.Ok().Body.Bytes() // No network I/O +} +``` + +### Retry Configuration + +```go +client := surf.NewClient(). + Builder(). + Retry(3, 2*time.Second). // Max 3 retries, 2 second wait + RetryCodes(http.StatusTooManyRequests, http.StatusServiceUnavailable). + Build() +``` + +## 🌐 Advanced Features + +### H2C (HTTP/2 Cleartext) + +```go +// Enable HTTP/2 without TLS +client := surf.NewClient(). + Builder(). + H2C(). + Build() + +resp := client.Get("http://localhost:8080/h2c-endpoint").Do() +``` + +### Custom Headers Order + +```go +// Control exact header order for fingerprinting evasion +headers := g.NewMapOrd[g.String, g.String]() +headers.Set("User-Agent", "Custom/1.0") +headers.Set("Accept", "*/*") +headers.Set("Accept-Language", "en-US") +headers.Set("Accept-Encoding", "gzip, deflate") + +client := surf.NewClient(). + Builder(). + SetHeaders(headers). // Headers will be sent in this exact order + Build() +``` + +### Custom DNS Resolver + +```go +client := surf.NewClient(). + Builder(). + Resolver("8.8.8.8:53"). // Use Google DNS + Build() +``` + +### DNS-over-TLS + +```go +client := surf.NewClient(). + Builder(). + DNSOverTLS("1.1.1.1:853"). // Cloudflare DoT + Build() +``` + +### Unix Domain Sockets + +```go +client := surf.NewClient(). + Builder(). + UnixSocket("/var/run/docker.sock"). + Build() + +resp := client.Get("http://localhost/v1.41/containers/json").Do() +``` + +### Network Interface Binding + +```go +client := surf.NewClient(). + Builder(). + InterfaceAddr("192.168.1.100"). // Bind to specific IP + Build() +``` + +### Raw HTTP Requests + +```go +rawRequest := `GET /api/data HTTP/1.1 +Host: example.com +User-Agent: Custom/1.0 +Accept: application/json + +` + +resp := surf.NewClient(). + Raw(g.String(rawRequest), "https"). + Do() +``` + +## 📚 API Reference + +### Client Methods + +| Method | Description | +|--------|-------------| +| `NewClient()` | Creates a new HTTP client with defaults | +| `Get(url, params...)` | Creates a GET request | +| `Post(url, data)` | Creates a POST request | +| `Put(url, data)` | Creates a PUT request | +| `Patch(url, data)` | Creates a PATCH request | +| `Delete(url, data...)` | Creates a DELETE request | +| `Head(url)` | Creates a HEAD request | +| `FileUpload(url, field, path, data...)` | Creates a multipart file upload | +| `Multipart(url, fields)` | Creates a multipart form request | +| `Raw(raw, scheme)` | Creates a request from raw HTTP | + +### Builder Methods + +| Method | Description | +|--------|-------------| +| `Impersonate()` | Enable browser impersonation | +| `JA()` | Configure JA3/JA4 fingerprinting | +| `HTTP2Settings()` | Configure HTTP/2 parameters | +| `HTTP3Settings()` | Configure HTTP/3 & QUIC parameters | +| `HTTP3()` | Enable HTTP/3 with automatic browser detection | +| `H2C()` | Enable HTTP/2 cleartext | +| `Proxy(proxy)` | Set proxy configuration (string, []string for rotation) | +| `DNS(dns)` | Set custom DNS resolver | +| `DNSOverTLS()` | Configure DNS-over-TLS | +| `Session()` | Enable cookie jar for sessions | +| `Singleton()` | Enable connection pooling (reuse client) | +| `Timeout(duration)` | Set request timeout | +| `MaxRedirects(n)` | Set maximum redirects | +| `NotFollowRedirects()` | Disable redirect following | +| `FollowOnlyHostRedirects()` | Only follow same-host redirects | +| `ForwardHeadersOnRedirect()` | Forward headers on redirects | +| `RedirectPolicy(fn)` | Custom redirect policy function | +| `Retry(max, wait, codes...)` | Configure retry logic | +| `CacheBody()` | Enable response body caching | +| `With(middleware, priority...)` | Add middleware | +| `BasicAuth(auth)` | Set basic authentication | +| `BearerAuth(token)` | Set bearer token authentication | +| `UserAgent(ua)` | Set custom user agent | +| `SetHeaders(headers...)` | Set request headers | +| `AddHeaders(headers...)` | Add request headers | +| `AddCookies(cookies...)` | Add cookies | +| `WithContext(ctx)` | Add context | +| `ContentType(type)` | Set content type | +| `GetRemoteAddress()` | Track remote address | +| `DisableKeepAlive()` | Disable keep-alive | +| `DisableCompression()` | Disable compression | +| `ForceHTTP1()` | Force HTTP/1.1 | +| `UnixDomainSocket(path)` | Use Unix socket | +| `InterfaceAddr(addr)` | Bind to network interface | +| `Boundary(fn)` | Custom multipart boundary generator | +| `Std()` | Convert to standard net/http.Client | + +### Request Methods + +| Method | Description | +|--------|-------------| +| `Do()` | Execute the request | +| `WithContext(ctx)` | Add context to request | +| `SetHeaders(headers...)` | Set request headers | +| `AddHeaders(headers...)` | Add request headers | +| `AddCookies(cookies...)` | Add cookies to request | + +### Response Properties + +| Property | Type | Description | +|----------|------|-------------| +| `StatusCode` | `StatusCode` | HTTP status code | +| `Headers` | `Headers` | Response headers | +| `Cookies` | `Cookies` | Response cookies | +| `Body` | `*Body` | Response body | +| `URL` | `*url.URL` | Final URL after redirects | +| `Time` | `time.Duration` | Request duration | +| `ContentLength` | `int64` | Content length | +| `Proto` | `string` | HTTP protocol version | +| `Attempts` | `int` | Number of retry attempts | + +### Body Methods + +| Method | Description | +|--------|-------------| +| `String()` | Get body as string | +| `Bytes()` | Get body as bytes | +| `JSON(v)` | Decode JSON into struct | +| `XML(v)` | Decode XML into struct | +| `MD5()` | Calculate MD5 hash | +| `UTF8()` | Convert to UTF-8 | +| `Stream()` | Get buffered reader | +| `SSE(fn)` | Process Server-Sent Events | +| `Dump(file)` | Save to file | +| `Contains(pattern)` | Check if contains pattern | +| `Limit(n)` | Limit body size | +| `Close()` | Close body reader | + +## 🤝 Contributing + +Contributions are welcome! Please feel free to submit a Pull Request. For major changes, please open an issue first to discuss what you would like to change. + +1. Fork the repository +2. Create your feature branch (`git checkout -b feature/AmazingFeature`) +3. Commit your changes (`git commit -m 'Add some AmazingFeature'`) +4. Push to the branch (`git push origin feature/AmazingFeature`) +5. Open a Pull Request + +## 📄 License + +This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details. + +## 🙏 Acknowledgments + +- Built with [enetx/http](https://github.com/enetx/http) for enhanced HTTP functionality +- HTTP/3 support and complete QUIC fingerprinting powered by [uQUIC](https://github.com/enetx/uquic) +- TLS fingerprinting powered by [uTLS](https://github.com/enetx/utls) +- Generic utilities from [enetx/g](https://github.com/enetx/g) + +## 📞 Support + +- **Issues**: [GitHub Issues](https://github.com/enetx/surf/issues) +- **Discussions**: [GitHub Discussions](https://github.com/enetx/surf/discussions) +- **Documentation**: [pkg.go.dev](https://pkg.go.dev/github.com/enetx/surf) + +--- + +

+ Made with ❤️ by the Surf contributors +

diff --git a/backend/vendor/github.com/enetx/surf/adapter.go b/backend/vendor/github.com/enetx/surf/adapter.go new file mode 100644 index 0000000..99fd967 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/adapter.go @@ -0,0 +1,250 @@ +package surf + +import ( + _http "net/http" + "net/url" + + "github.com/enetx/http" +) + +// Std returns a standard net/http.Client that wraps the configured surf client. +// This is useful for integrating with third-party libraries that expect a standard net/http.Client +// while preserving most surf features. +// +// Supported features: +// - JA3/TLS fingerprinting +// - HTTP/2 settings +// - Cookies and sessions +// - Request/Response middleware +// - Headers (User-Agent, custom headers) +// - Proxy configuration +// - Timeout settings +// - Redirect policies +// - Impersonate browser headers +// +// Known limitations: +// - Retry logic is NOT supported (implemented in Request.Do(), not in transport) +// - Response body caching is NOT supported +// - Remote address tracking is NOT supported +// - Request timing information is NOT available +// +// For applications requiring retry logic, consider implementing it at the application level +// or use surf.Client directly for those specific requests. +// +// Example usage: +// +// surfClient := surf.NewClient(). +// Builder(). +// JA3().Chrome(). +// Session(). +// Build() +// +// // For libraries expecting net/http.Client +// stdClient := surfClient.Std() +// +// botClient := &BaseBotClient{ +// Client: *stdClient, +// } +func (c *Client) Std() *_http.Client { + var jar _http.CookieJar + if c.cli.Jar != nil { + jar = &CookieJarAdapter{jar: c.cli.Jar} + } + + return &_http.Client{ + Transport: &TransportAdapter{ + transport: c.transport, + client: c, + }, + Jar: jar, + Timeout: c.cli.Timeout, + CheckRedirect: redirect(c.cli.CheckRedirect), + } +} + +// TransportAdapter adapts surf.Client to net/http.RoundTripper +// It uses the full surf pipeline including middleware +type TransportAdapter struct { + transport http.RoundTripper + client *Client +} + +func (s *TransportAdapter) CloseIdleConnections() { + if closer, ok := s.transport.(interface{ CloseIdleConnections() }); ok { + closer.CloseIdleConnections() + } +} + +// RoundTrip implements net/http.RoundTripper interface using surf's full pipeline +func (s *TransportAdapter) RoundTrip(req *_http.Request) (*_http.Response, error) { + sreq := &Request{ + request: request(req), + cli: s.client, + } + + if err := s.client.applyReqMW(sreq); err != nil { + return nil, err + } + + _resp, err := s.client.cli.Transport.RoundTrip(sreq.request) + if err != nil { + return nil, err + } + + resp := &Response{ + response: _resp, + Client: s.client, + StatusCode: StatusCode(_resp.StatusCode), + Headers: Headers(_resp.Header), + request: sreq, + } + + if err := s.client.applyRespMW(resp); err != nil { + return nil, err + } + + return response(resp.response, req), nil +} + +// request converts net/http.Request to github.com/enetx/http.Request. +// It preserves all fields including headers, body, and context while +// adapting to the enetx/http package types. +func request(_req *_http.Request) *http.Request { + req := &http.Request{ + Method: _req.Method, + URL: _req.URL, + Proto: _req.Proto, + ProtoMajor: _req.ProtoMajor, + ProtoMinor: _req.ProtoMinor, + Header: http.Header(_req.Header), + Body: _req.Body, + ContentLength: _req.ContentLength, + TransferEncoding: _req.TransferEncoding, + Close: _req.Close, + Host: _req.Host, + Form: _req.Form, + PostForm: _req.PostForm, + MultipartForm: _req.MultipartForm, + Trailer: http.Header(_req.Trailer), + RemoteAddr: _req.RemoteAddr, + RequestURI: _req.RequestURI, + TLS: _req.TLS, + Response: nil, + GetBody: _req.GetBody, + Pattern: _req.Pattern, + Cancel: _req.Cancel, // deprecated but kept for compatibility + } + + return req.WithContext(_req.Context()) +} + +// response converts github.com/enetx/http.Response to net/http.Response. +// It preserves all response fields including status, headers, and body +// while adapting back to standard net/http types. +func response(resp *http.Response, _req *_http.Request) *_http.Response { + return &_http.Response{ + Status: resp.Status, + StatusCode: resp.StatusCode, + Proto: resp.Proto, + ProtoMajor: resp.ProtoMajor, + ProtoMinor: resp.ProtoMinor, + Header: _http.Header(resp.Header), + Body: resp.Body, + ContentLength: resp.ContentLength, + TransferEncoding: resp.TransferEncoding, + Close: resp.Close, + Uncompressed: resp.Uncompressed, + Trailer: _http.Header(resp.Trailer), + Request: _req, + TLS: resp.TLS, + } +} + +// CookieJarAdapter adapts github.com/enetx/http.CookieJar to net/http.CookieJar. +// It provides bidirectional cookie conversion between the two HTTP packages, +// ensuring cookies set through either interface work correctly. +type CookieJarAdapter struct{ jar http.CookieJar } + +// SetCookies implements http.CookieJar interface. +// It converts standard net/http cookies to enetx/http format and +// delegates to the underlying surf cookie jar. +func (c *CookieJarAdapter) SetCookies(u *url.URL, _cookies []*_http.Cookie) { + if len(_cookies) == 0 { + c.jar.SetCookies(u, nil) + return + } + + cookies := make([]*http.Cookie, 0, len(_cookies)) + for _, ck := range _cookies { + cookies = append(cookies, &http.Cookie{ + Name: ck.Name, + Value: ck.Value, + Quoted: ck.Quoted, + Path: ck.Path, + Domain: ck.Domain, + Expires: ck.Expires, + RawExpires: ck.RawExpires, + MaxAge: ck.MaxAge, + Secure: ck.Secure, + HttpOnly: ck.HttpOnly, + SameSite: http.SameSite(ck.SameSite), + Partitioned: ck.Partitioned, + Raw: ck.Raw, + Unparsed: ck.Unparsed, + }) + } + + c.jar.SetCookies(u, cookies) +} + +// Cookies implements http.CookieJar interface. +// It retrieves cookies from the underlying surf cookie jar and +// converts them to standard net/http cookie format. +func (c *CookieJarAdapter) Cookies(u *url.URL) []*_http.Cookie { + cookies := c.jar.Cookies(u) + if len(cookies) == 0 { + return nil + } + + _cookies := make([]*_http.Cookie, 0, len(cookies)) + + for _, ck := range cookies { + _cookies = append(_cookies, &_http.Cookie{ + Name: ck.Name, + Value: ck.Value, + Quoted: ck.Quoted, + Path: ck.Path, + Domain: ck.Domain, + Expires: ck.Expires, + RawExpires: ck.RawExpires, + MaxAge: ck.MaxAge, + Secure: ck.Secure, + HttpOnly: ck.HttpOnly, + SameSite: _http.SameSite(ck.SameSite), + Partitioned: ck.Partitioned, + Raw: ck.Raw, + Unparsed: ck.Unparsed, + }) + } + + return _cookies +} + +// redirect adapts surf's redirect policy function to work with standard net/http. +// It converts net/http requests to enetx/http format, calls the surf redirect policy, +// and returns the result. This ensures custom redirect policies work correctly +// through the standard http.Client interface. +func redirect(fn func(*http.Request, []*http.Request) error) func(*_http.Request, []*_http.Request) error { + if fn == nil { + return nil + } + + return func(req *_http.Request, via []*_http.Request) error { + _req := request(req) + _via := make([]*http.Request, len(via)) + for i := range via { + _via[i] = request(via[i]) + } + return fn(_req, _via) + } +} diff --git a/backend/vendor/github.com/enetx/surf/body.go b/backend/vendor/github.com/enetx/surf/body.go new file mode 100644 index 0000000..a146939 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/body.go @@ -0,0 +1,159 @@ +package surf + +import ( + "bufio" + "encoding/json" + "encoding/xml" + "errors" + "io" + "math" + "regexp" + + "github.com/enetx/g" + "github.com/enetx/surf/pkg/sse" + "golang.org/x/net/html/charset" +) + +// Body represents an HTTP response body with enhanced functionality and automatic caching. +// Provides convenient methods for parsing common data formats (JSON, XML, text) and includes +// features like automatic decompression, content caching, character set detection, and size limits. +type Body struct { + Reader io.ReadCloser // ReadCloser for accessing the raw body content + contentType string // MIME content type from Content-Type header + content g.Bytes // Cached body content (populated when cache is enabled) + limit int64 // Maximum allowed body size in bytes (-1 for unlimited) + cache bool // Whether to cache the body content in memory for reuse +} + +// MD5 returns the MD5 hash of the body's content as a HString. +func (b *Body) MD5() g.String { return b.String().Hash().MD5() } + +// XML decodes the body's content as XML into the provided data structure. +func (b *Body) XML(data any) error { + return xml.Unmarshal(b.Bytes(), data) +} + +// JSON decodes the body's content as JSON into the provided data structure. +func (b *Body) JSON(data any) error { return json.Unmarshal(b.Bytes(), data) } + +// Stream returns the body's bufio.Reader for streaming the content. +func (b *Body) Stream() *bufio.Reader { + if b == nil || b.Reader == nil { + return nil + } + + return bufio.NewReader(b.Reader) +} + +// SSE reads the body's content as Server-Sent Events (SSE) and calls the provided function for each event. +// It expects the function to take an *sse.Event pointer as its argument and return a boolean value. +// If the function returns false, the SSE reading stops. +func (b *Body) SSE(fn func(event *sse.Event) bool) error { return sse.Read(b.Stream(), fn) } + +// String returns the body's content as a g.String. +func (b *Body) String() g.String { return b.Bytes().String() } + +// Limit sets the body's size limit and returns the modified body. +func (b *Body) Limit(limit int64) *Body { + if b != nil { + b.limit = limit + } + + return b +} + +// Close closes the body and returns any error encountered. +func (b *Body) Close() error { + if b == nil || b.Reader == nil { + return errors.New("cannot close: body is empty or contains no content") + } + + if _, err := io.Copy(io.Discard, b.Reader); err != nil { + return err + } + + return b.Reader.Close() +} + +// UTF8 converts the body's content to UTF-8 encoding and returns it as a string. +func (b *Body) UTF8() g.String { + if b == nil { + return "" + } + + reader, err := charset.NewReader(b.Bytes().Reader(), b.contentType) + if err != nil { + return b.String() + } + + content, err := io.ReadAll(reader) + if err != nil { + return b.String() + } + + return g.String(content) +} + +// Bytes returns the body's content as a byte slice. +func (b *Body) Bytes() g.Bytes { + if b == nil { + return nil + } + + if b.cache && b.content != nil { + return b.content + } + + if _, err := b.Reader.Read(nil); err != nil { + if err.Error() == "http: read on closed response body" { + return nil + } + } + + defer b.Close() + + if b.limit == -1 { + b.limit = math.MaxInt64 + } + + content, err := io.ReadAll(io.LimitReader(b.Reader, b.limit)) + if err != nil { + return nil + } + + if b.cache { + b.content = content + } + + return content +} + +// Dump dumps the body's content to a file with the given filename. +func (b *Body) Dump(filename g.String) error { + if b == nil || b.Reader == nil { + return errors.New("cannot dump: body is empty or contains no content") + } + + defer b.Close() + + return g.NewFile(filename).WriteFromReader(b.Reader).Err() +} + +// Contains checks if the body's content contains the provided pattern (byte slice, string, or +// *regexp.Regexp) and returns a boolean. +func (b *Body) Contains(pattern any) bool { + switch p := pattern.(type) { + case []byte: + return b.Bytes().Lower().Contains(g.Bytes(p).Lower()) + case g.Bytes: + return b.Bytes().Lower().Contains(p.Lower()) + case string: + return b.String().Lower().Contains(g.String(p).Lower()) + case g.String: + return b.String().Lower().Contains(p.Lower()) + case *regexp.Regexp: + return b.String().Regexp().Match(p) + } + + return false +} diff --git a/backend/vendor/github.com/enetx/surf/builder.go b/backend/vendor/github.com/enetx/surf/builder.go new file mode 100644 index 0000000..2bcbd49 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/builder.go @@ -0,0 +1,375 @@ +package surf + +import ( + "context" + "fmt" + "time" + + "github.com/enetx/g" + "github.com/enetx/http" +) + +// browser represents the browser type being impersonated for fingerprinting. +type browser int + +const ( + unknownBrowser browser = iota // No specific browser fingerprinting + chromeBrowser // Chrome browser fingerprinting + firefoxBrowser // Firefox browser fingerprinting +) + +// Builder provides a fluent interface for configuring HTTP clients with various advanced features +// including proxy settings, TLS fingerprinting, HTTP/2 and HTTP/3 support, retry logic, +// redirect handling, and browser impersonation capabilities. +type Builder struct { + cli *Client // The client being configured + proxy any // Proxy configuration (static string/slice or dynamic function) + checkRedirect func(*http.Request, []*http.Request) error // Custom redirect policy function + http2settings *HTTP2Settings // HTTP/2 specific settings + http3settings *HTTP3Settings // HTTP/3 specific settings + retryCodes g.Slice[int] // HTTP status codes that trigger retries + cliMWs *middleware[*Client] // Priority-ordered client middlewares + retryWait time.Duration // Wait duration between retry attempts + retryMax int // Maximum number of retry attempts + maxRedirects int // Maximum number of redirects to follow + forceHTTP1 bool // Force HTTP/1.1 protocol usage + cacheBody bool // Enable response body caching + followOnlyHostRedirects bool // Only follow redirects within same host + forwardHeadersOnRedirect bool // Preserve headers during redirects + ja bool // Enable JA3 TLS fingerprinting + singleton bool // Use singleton pattern for connection reuse + browser browser // Browser type for fingerprinting + http3 bool // Enable HTTP/3 with automatic browser detection +} + +// Build sets the provided settings for the client and returns the updated client. +// It configures various settings like HTTP2, sessions, keep-alive, dial TLS, resolver, +// interface address, timeout, and redirect policy. +func (b *Builder) Build() *Client { + // Apply HTTP/3 settings lazily if enabled + if b.http3 { + http3s := b.HTTP3Settings() + + switch b.browser { + case chromeBrowser: + http3s.Chrome().Set() + case firefoxBrowser: + http3s.Firefox().Set() + default: + // Default to Chrome if no browser was detected + http3s.Chrome().Set() + } + } + + // apply each middleware to the Client + b.cliMWs.run(b.cli) + + return b.cli +} + +// With registers middleware into the client builder with optional priority. +// +// It accepts one of the following middleware function types: +// - func(*surf.Client) error — client middleware, modifies or initializes the client +// - func(*surf.Request) error — request middleware, intercepts or transforms outgoing requests +// - func(*surf.Response) error — response middleware, intercepts or transforms incoming responses +// +// Parameters: +// - middleware: A function matching one of the supported middleware types. +// - priority (optional): Integer priority level. Lower values run earlier. Defaults to 0. +// +// Middleware with the same priority are executed in order of insertion (FIFO). +// If the middleware type is not recognized, With panics with an informative error. +// +// Example: +// +// // Adding client middleware to modify client settings. +// .With(func(client *surf.Client) error { +// // Custom logic to modify the client settings. +// return nil +// }) +// +// // Adding request middleware to intercept outgoing requests. +// .With(func(req *surf.Request) error { +// // Custom logic to modify outgoing requests. +// return nil +// }) +// +// // Adding response middleware to intercept incoming responses. +// .With(func(resp *surf.Response) error { +// // Custom logic to handle incoming responses. +// return nil +// }) +// +// Note: Ensure that middleware functions adhere to the specified function signatures to work correctly with the With method. +func (b *Builder) With(middleware any, priority ...int) *Builder { + p := g.Int(g.Slice[int](priority).Get(0).UnwrapOrDefault()) + + switch v := middleware.(type) { + case func(*Client) error: + b.addCliMW(v, p) + case func(*Request) error: + b.addReqMW(v, p) + case func(*Response) error: + b.addRespMW(v, p) + default: + panic(fmt.Sprintf("invalid middleware type: %T", v)) + } + + return b +} + +// addCliMW adds a client middleware to the ClientBuilder. +func (b *Builder) addCliMW(m func(*Client) error, priority g.Int) *Builder { + b.cliMWs.add(priority, m) + return b +} + +// addReqMW adds a request middleware to the ClientBuilder. +func (b *Builder) addReqMW(m func(*Request) error, priority g.Int) *Builder { + b.cli.reqMWs.add(priority, m) + return b +} + +// addRespMW adds a response middleware to the ClientBuilder. +func (b *Builder) addRespMW(m func(*Response) error, priority g.Int) *Builder { + b.cli.respMWs.add(priority, m) + return b +} + +func (b *Builder) Boundary(boundary func() g.String) *Builder { + return b.addCliMW(func(client *Client) error { return boundaryMW(client, boundary) }, 999) +} + +// Singleton configures the client to use a singleton instance, ensuring there's only one client instance. +// This is needed specifically for JA or Impersonate functionalities. +// +// cli := surf.NewClient(). +// Builder(). +// Singleton(). // for reuse client +// Impersonate(). +// FireFox(). +// Build() +// +// defer cli.CloseIdleConnections() +func (b *Builder) Singleton() *Builder { + b.singleton = true + return b +} + +// H2C configures the client to handle HTTP/2 Cleartext (h2c). +func (b *Builder) H2C() *Builder { return b.addCliMW(h2cMW, 999) } + +// HTTP2Settings configures settings related to HTTP/2 and returns an http2s struct. +func (b *Builder) HTTP2Settings() *HTTP2Settings { + h2 := &HTTP2Settings{builder: b} + b.http2settings = h2 + + return h2 +} + +// HTTP3Settings configures settings related to HTTP/3 and returns an http3s struct. +func (b *Builder) HTTP3Settings() *HTTP3Settings { + h3 := &HTTP3Settings{builder: b} + b.http3settings = h3 + b.http3 = false + + return h3 +} + +// HTTP3 enables HTTP/3 with automatic browser detection. +// Settings are applied lazily in Build() based on the impersonated browser. +// Usage: surf.NewClient().Builder().Impersonate().Chrome().HTTP3().Build() +func (b *Builder) HTTP3() *Builder { + b.http3 = true + return b +} + +// Impersonate configures something related to impersonation and returns an impersonate struct. +func (b *Builder) Impersonate() *Impersonate { return &Impersonate{builder: b} } + +// JA configures the client to use a specific TLS fingerprint. +func (b *Builder) JA() *JA { + b.ja = true + return &JA{builder: b} +} + +// UnixSocket sets the path for a Unix domain socket. +// This allows the HTTP client to connect to the server using a Unix domain +// socket instead of a traditional TCP/IP connection. +func (b *Builder) UnixSocket(address g.String) *Builder { + return b.addCliMW(func(client *Client) error { return unixSocketMW(client, address) }, 0) +} + +// DNS sets the custom DNS resolver address. +func (b *Builder) DNS(dns g.String) *Builder { + return b.addCliMW(func(client *Client) error { return dnsMW(client, dns) }, 0) +} + +// DNSOverTLS configures the client to use DNS over TLS. +func (b *Builder) DNSOverTLS() *DNSOverTLS { return &DNSOverTLS{builder: b} } + +// Timeout sets the timeout duration for the client. +func (b *Builder) Timeout(timeout time.Duration) *Builder { + return b.addCliMW(func(client *Client) error { return timeoutMW(client, timeout) }, 0) +} + +// InterfaceAddr sets the network interface address for the client. +func (b *Builder) InterfaceAddr(address g.String) *Builder { + return b.addCliMW(func(client *Client) error { return interfaceAddrMW(client, address) }, 0) +} + +// Proxy sets the proxy settings for the client. +// Supports both static proxy configurations and dynamic proxy provider functions. +// +// Static proxy examples: +// +// .Proxy("socks5://127.0.0.1:9050") +// .Proxy([]string{"socks5://proxy1", "http://proxy2"}) +// +// Dynamic proxy example: +// +// .Proxy(func() g.String { +// // Your proxy rotation logic here +// return "socks5://127.0.0.1:9050" +// }) +func (b *Builder) Proxy(proxy any) *Builder { + b.proxy = proxy + return b.addCliMW(func(client *Client) error { return proxyMW(client, proxy) }, 0) +} + +// BasicAuth sets the basic authentication credentials for the client. +func (b *Builder) BasicAuth(authentication g.String) *Builder { + return b.addReqMW(func(req *Request) error { return basicAuthMW(req, authentication) }, 900) +} + +// BearerAuth sets the bearer token for the client. +func (b *Builder) BearerAuth(authentication g.String) *Builder { + return b.addReqMW(func(req *Request) error { return bearerAuthMW(req, authentication) }, 901) +} + +// UserAgent sets the user agent for the client. +func (b *Builder) UserAgent(userAgent any) *Builder { + return b.addReqMW(func(req *Request) error { return userAgentMW(req, userAgent) }, 0) +} + +// SetHeaders sets headers for the request, replacing existing ones with the same name. +func (b *Builder) SetHeaders(headers ...any) *Builder { + return b.addReqMW(func(r *Request) error { + r.SetHeaders(headers...) + return nil + }, 0) +} + +// AddHeaders adds headers to the request, appending to any existing headers with the same name. +func (b *Builder) AddHeaders(headers ...any) *Builder { + return b.addReqMW(func(r *Request) error { + r.AddHeaders(headers...) + return nil + }, 0) +} + +// AddCookies adds cookies to the request. +func (b *Builder) AddCookies(cookies ...*http.Cookie) *Builder { + return b.addReqMW(func(r *Request) error { + r.AddCookies(cookies...) + return nil + }, 0) +} + +// WithContext associates the provided context with the request. +func (b *Builder) WithContext(ctx context.Context) *Builder { + return b.addReqMW(func(r *Request) error { + r.WithContext(ctx) + return nil + }, 0) +} + +// ContentType sets the content type for the client. +func (b *Builder) ContentType(contentType g.String) *Builder { + return b.addReqMW(func(req *Request) error { return contentTypeMW(req, contentType) }, 0) +} + +// CacheBody configures whether the client should cache the body of the response. +func (b *Builder) CacheBody() *Builder { + b.cacheBody = true + return b +} + +// GetRemoteAddress configures whether the client should get the remote address. +func (b *Builder) GetRemoteAddress() *Builder { return b.addReqMW(remoteAddrMW, 0) } + +// DisableKeepAlive disable keep-alive connections. +func (b *Builder) DisableKeepAlive() *Builder { return b.addCliMW(disableKeepAliveMW, 0) } + +// DisableCompression disables compression for the HTTP client. +func (b *Builder) DisableCompression() *Builder { return b.addCliMW(disableCompressionMW, 0) } + +// Retry configures the retry behavior of the client. +// +// Parameters: +// +// retryMax: Maximum number of retries to be attempted. +// retryWait: Duration to wait between retries. +// codes: Optional list of HTTP status codes that trigger retries. +// If no codes are provided, default codes will be used +// (500, 429, 503 - Internal Server Error, Too Many Requests, Service Unavailable). +func (b *Builder) Retry(retryMax int, retryWait time.Duration, codes ...int) *Builder { + b.retryMax = retryMax + b.retryWait = retryWait + + if len(codes) == 0 { + b.retryCodes = g.SliceOf( + http.StatusInternalServerError, + http.StatusTooManyRequests, + http.StatusServiceUnavailable, + ) + } else { + b.retryCodes = g.SliceOf(codes...) + } + + return b +} + +// ForceHTTP1MW configures the client to use HTTP/1.1 forcefully. +func (b *Builder) ForceHTTP1() *Builder { + b.forceHTTP1 = true + return b.addCliMW(forseHTTP1MW, 0) +} + +// Session configures whether the client should maintain a session. +func (b *Builder) Session() *Builder { return b.addCliMW(sessionMW, 0) } + +// MaxRedirects sets the maximum number of redirects the client should follow. +func (b *Builder) MaxRedirects(maxRedirects int) *Builder { + b.maxRedirects = maxRedirects + return b.addCliMW(redirectPolicyMW, 0) +} + +// NotFollowRedirects disables following redirects for the client. +func (b *Builder) NotFollowRedirects() *Builder { + return b.RedirectPolicy(func(*http.Request, []*http.Request) error { return http.ErrUseLastResponse }) +} + +// FollowOnlyHostRedirects configures whether the client should only follow redirects within the +// same host. +func (b *Builder) FollowOnlyHostRedirects() *Builder { + b.followOnlyHostRedirects = true + return b.addCliMW(redirectPolicyMW, 0) +} + +// ForwardHeadersOnRedirect adds a middleware to the ClientBuilder object that ensures HTTP headers are +// forwarded during a redirect. +func (b *Builder) ForwardHeadersOnRedirect() *Builder { + b.forwardHeadersOnRedirect = true + return b.addCliMW(redirectPolicyMW, 0) +} + +// RedirectPolicy sets a custom redirect policy for the client. +func (b *Builder) RedirectPolicy(fn func(*http.Request, []*http.Request) error) *Builder { + b.checkRedirect = fn + return b.addCliMW(redirectPolicyMW, 0) +} + +// String generate a string representation of the ClientBuilder instance. +func (b Builder) String() string { return fmt.Sprintf("%#v", b) } diff --git a/backend/vendor/github.com/enetx/surf/client.go b/backend/vendor/github.com/enetx/surf/client.go new file mode 100644 index 0000000..9ad16ac --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/client.go @@ -0,0 +1,608 @@ +// Package surf provides a comprehensive HTTP client library with advanced features +// for web scraping, automation, and HTTP/3 support with various browser fingerprinting capabilities. +package surf + +import ( + "bufio" + "bytes" + "crypto/tls" + "encoding/json" + "encoding/xml" + "errors" + "fmt" + "io" + "mime/multipart" + "net" + "net/url" + "os" + "path/filepath" + "reflect" + "strings" + "sync" + + "github.com/enetx/g" + "github.com/enetx/http" + "github.com/enetx/surf/header" +) + +// Client represents a highly configurable HTTP client with middleware support, +// advanced transport options (HTTP/1.1, HTTP/2, HTTP/3), proxy handling, +// TLS fingerprinting, and comprehensive request/response processing capabilities. +type Client struct { + cli *http.Client // Standard HTTP client for actual requests + dialer *net.Dialer // Network dialer with optional custom DNS resolver + builder *Builder // Associated builder for configuration + transport http.RoundTripper // HTTP transport (can be HTTP/1.1, HTTP/2, or HTTP/3) + tlsConfig *tls.Config // TLS configuration for secure connections + reqMWs *middleware[*Request] // Priority-ordered request middlewares + respMWs *middleware[*Response] // Priority-ordered response middlewares + boundary func() g.String // Custom boundary generator for multipart requests + mwMutex sync.Mutex // Mutex for thread-safe middleware operations +} + +// NewClient creates a new Client with sensible default settings including +// default dialer, TLS configuration, HTTP transport, and basic middleware. +func NewClient() *Client { + cli := &Client{ + reqMWs: newMiddleware[*Request](), + respMWs: newMiddleware[*Response](), + } + + defaultDialerMW(cli) + defaultTLSConfigMW(cli) + defaultTransportMW(cli) + defaultClientMW(cli) + redirectPolicyMW(cli) + + cli.reqMWs.add(0, defaultUserAgentMW) + cli.reqMWs.add(0, got101ResponseMW) + + cli.respMWs.add(0, webSocketUpgradeErrorMW) + cli.respMWs.add(0, decodeBodyMW) + + return cli +} + +// applyReqMW applies all registered request middlewares to the given request in priority order. +// Middlewares are sorted by priority before execution, and processing stops on first error. +func (c *Client) applyReqMW(req *Request) error { + c.mwMutex.Lock() + defer c.mwMutex.Unlock() + + return c.reqMWs.run(req) +} + +// applyRespMW applies all registered response middlewares to the given response in priority order. +// Middlewares are sorted by priority before execution, and processing stops on first error. +func (c *Client) applyRespMW(resp *Response) error { + c.mwMutex.Lock() + defer c.mwMutex.Unlock() + + return c.respMWs.run(resp) +} + +// CloseIdleConnections removes all entries from the cached transports. +// Specifically used when Singleton is enabled for JA3 or Impersonate functionalities. +func (c *Client) CloseIdleConnections() { + if c.builder == nil || !c.builder.singleton { + return + } + + c.cli.CloseIdleConnections() +} + +// GetClient returns http.Client used by the Client. +func (c *Client) GetClient() *http.Client { return c.cli } + +// GetDialer returns the net.Dialer used by the Client. +func (c *Client) GetDialer() *net.Dialer { return c.dialer } + +// GetTransport returns the http.transport used by the Client. +func (c *Client) GetTransport() http.RoundTripper { return c.transport } + +// GetTLSConfig returns the tls.Config used by the Client. +func (c *Client) GetTLSConfig() *tls.Config { return c.tlsConfig } + +// Builder returns a new Builder instance associated with this client. +// The builder allows for method chaining to configure various client options. +func (c *Client) Builder() *Builder { + c.builder = &Builder{cli: c, cliMWs: newMiddleware[*Client]()} + return c.builder +} + +// Raw creates a new HTTP request using the provided raw data and scheme. +// The raw parameter should contain the raw HTTP request data as a string. +// The scheme parameter specifies the scheme (e.g., http, https) for the request. +func (c *Client) Raw(raw, scheme g.String) *Request { + request := new(Request) + + req, err := http.ReadRequest(bufio.NewReader(raw.Trim().Append("\n\n").Reader())) + if err != nil { + request.err = err + return request + } + + req.RequestURI, req.URL.Scheme, req.URL.Host = "", scheme.Std(), req.Host + + request.request = req + request.cli = c + + return request +} + +// Get creates a new HTTP GET request with the specified URL. +// Optional data parameter can be provided for query parameters. +func (c *Client) Get(rawURL g.String, data ...any) *Request { + if len(data) != 0 { + return c.buildRequest(rawURL, http.MethodGet, data[0]) + } + + return c.buildRequest(rawURL, http.MethodGet, nil) +} + +// Delete creates a new HTTP DELETE request with the specified URL. +// Optional data parameter can be provided for request body. +func (c *Client) Delete(rawURL g.String, data ...any) *Request { + if len(data) != 0 { + return c.buildRequest(rawURL, http.MethodDelete, data[0]) + } + + return c.buildRequest(rawURL, http.MethodDelete, nil) +} + +// Head creates a new HTTP HEAD request with the specified URL. +// HEAD requests are identical to GET but only return response headers. +func (c *Client) Head(rawURL g.String) *Request { + return c.buildRequest(rawURL, http.MethodHead, nil) +} + +// Post creates a new HTTP POST request with the specified URL and data. +// Data can be of various types (string, map, struct) and will be encoded appropriately. +func (c *Client) Post(rawURL g.String, data any) *Request { + return c.buildRequest(rawURL, http.MethodPost, data) +} + +// Put creates a new HTTP PUT request with the specified URL and data. +// PUT requests typically replace the entire resource at the specified URL. +func (c *Client) Put(rawURL g.String, data any) *Request { + return c.buildRequest(rawURL, http.MethodPut, data) +} + +// Patch creates a new HTTP PATCH request with the specified URL and data. +// PATCH requests typically apply partial modifications to a resource. +func (c *Client) Patch(rawURL g.String, data any) *Request { + return c.buildRequest(rawURL, http.MethodPatch, data) +} + +// FileUpload creates a new multipart file upload request. +// It uploads a file from filePath using the specified fieldName in the form. +// Optional data can include additional form fields (g.MapOrd) or custom reader (io.Reader). +func (c *Client) FileUpload(rawURL, fieldName, filePath g.String, data ...any) *Request { + sanitizedURL := sanitizeURL(rawURL) + + var ( + multipartData g.MapOrd[string, string] + reader io.Reader + file *os.File + err error + ) + + const maxDataLen = 2 + + if len(data) > maxDataLen { + data = data[:2] + } + + for _, v := range data { + switch i := v.(type) { + case g.MapOrd[g.String, g.String]: + mo := g.NewMapOrd[string, string](i.Len()) + i.Iter().ForEach(func(k, v g.String) { mo.Set(k.Std(), v.Std()) }) + multipartData = mo + case g.MapOrd[string, string]: + multipartData = i + case string: + reader = strings.NewReader(i) + case g.String: + reader = i.Reader() + case io.Reader: + reader = i + } + } + + request := new(Request) + + if reader == nil { + file, err = os.Open(filePath.Std()) + if err != nil { + request.err = err + return request + } + + reader = bufio.NewReader(file) + } + + bodyReader, bodyWriter := io.Pipe() + formWriter := multipart.NewWriter(bodyWriter) + + if c.boundary != nil { + if err = formWriter.SetBoundary(c.boundary().Std()); err != nil { + request.err = err + return request + } + } + + var ( + errOnce sync.Once + writeErr error + ) + + setWriteErr := func(err error) { + if err != nil { + errOnce.Do(func() { writeErr = err }) + } + } + + go func() { + defer func() { + if formWriter != nil { + setWriteErr(formWriter.Close()) + } + + if bodyWriter != nil { + setWriteErr(bodyWriter.Close()) + } + + if file != nil { + setWriteErr(file.Close()) + } + }() + + partWriter, err := formWriter.CreateFormFile(fieldName.Std(), filepath.Base(filePath.Std())) + if err != nil { + setWriteErr(err) + return + } + + if _, err = io.Copy(partWriter, reader); err != nil { + setWriteErr(err) + return + } + + multipartData.Iter(). + Range(func(fieldname, value string) bool { + if err = formWriter.WriteField(fieldname, value); err != nil { + setWriteErr(err) + return false + } + + return true + }) + }() + + req, err := http.NewRequest(http.MethodPost, sanitizedURL, bodyReader) + if err != nil { + request.err = err + return request + } + + req.Header.Set(header.CONTENT_TYPE, formWriter.FormDataContentType()) + + request.request = req + request.cli = c + request.werr = &writeErr + + return request +} + +// Multipart creates a new multipart form data request with the specified form fields. +// The multipartData map contains field names and their corresponding values. +func (c *Client) Multipart(rawURL g.String, multipartData g.MapOrd[g.String, g.String]) *Request { + sanitizedURL := sanitizeURL(rawURL) + + body := new(bytes.Buffer) + writer := multipart.NewWriter(body) + + if c.boundary != nil { + if err := writer.SetBoundary(c.boundary().Std()); err != nil { + request := new(Request) + request.err = err + return request + } + } + + request := new(Request) + + multipartData.Iter(). + Range(func(fieldname, value g.String) bool { + formWriter, err := writer.CreateFormField(fieldname.Std()) + if err != nil { + request.err = err + return false + } + + if _, err := io.Copy(formWriter, value.Reader()); err != nil { + request.err = err + return false + } + + return true + }) + + if request.err != nil { + return request + } + + if err := writer.Close(); err != nil { + request.err = err + return request + } + + req, err := http.NewRequest(http.MethodPost, sanitizedURL, body) + if err != nil { + request.err = err + return request + } + + req.Header.Set(header.CONTENT_TYPE, writer.FormDataContentType()) + + request.request = req + request.cli = c + + return request +} + +// getCookies returns cookies for the specified URL. +func (c Client) getCookies(rawURL g.String) []*http.Cookie { + if c.cli.Jar == nil { + return nil + } + + parsedURL := parseURL(rawURL) + if parsedURL.IsErr() { + return nil + } + + return c.cli.Jar.Cookies(parsedURL.Ok()) +} + +// setCookies sets cookies for the specified URL. +func (c *Client) setCookies(rawURL g.String, cookies []*http.Cookie) error { + if c.cli.Jar == nil { + return errors.New("cookie jar is not available") + } + + parsedURL := parseURL(rawURL) + if parsedURL.IsErr() { + return parsedURL.Err() + } + + c.cli.Jar.SetCookies(parsedURL.Ok(), cookies) + + return nil +} + +// buildRequest accepts a raw URL, a method type (like GET or POST), and data of any type. +// It formats the URL, builds the request body, and creates a new HTTP request with the specified +// method type and body. +// If there is an error, it returns a Request object with the error set. +func (c *Client) buildRequest(rawURL g.String, methodType string, data any) *Request { + sanitizedURL := sanitizeURL(rawURL) + + request := new(Request) + + body, contentType, err := buildBody(data) + if err != nil { + request.err = err + return request + } + + req, err := http.NewRequest(methodType, sanitizedURL, body) + if err != nil { + request.err = err + return request + } + + if contentType != "" { + req.Header.Add(header.CONTENT_TYPE, contentType) + } + + request.request = req + request.cli = c + + return request +} + +// buildBody takes data of any type and, depending on its type, calls the appropriate method to +// build the request body. +// It returns an io.Reader, content type string, and an error if any. +func buildBody(data any) (io.Reader, string, error) { + if data == nil { + return nil, "", nil + } + + switch d := data.(type) { + case []byte: + return buildByteBody(d) + case g.Bytes: + return buildByteBody(d) + case string: + return buildStringBody(d) + case g.String: + return buildStringBody(d) + case map[string]string: + return buildMapBody(d) + case g.Map[string, string]: + return buildMapBody(d) + case g.Map[g.String, g.String]: + return buildMapBody(d) + case g.MapOrd[g.String, g.String]: + return buildMapOrdBody(d) + case g.MapOrd[string, string]: + return buildMapOrdBody(d) + default: + return buildAnnotatedBody(data) + } +} + +// buildByteBody accepts a byte slice and returns an io.Reader, content type string, and an error +// if any. +// It detects the content type of the data and creates a bytes.Reader from the data. +func buildByteBody(data []byte) (io.Reader, string, error) { + // raw data + contentType := http.DetectContentType(data) + reader := bytes.NewReader(data) + + return reader, contentType, nil +} + +// buildStringBody accepts a string and returns an io.Reader, content type string, and an error if +// any. +// It detects the content type of the data and creates a strings.Reader from the data. +func buildStringBody[T ~string](data T) (io.Reader, string, error) { + s := g.String(data) + + contentType := detectContentType(s.Bytes()) + + // if post encoded data aaa=bbb&ddd=ccc + if contentType == "text/plain; charset=utf-8" && s.ContainsAnyChars("=&") { + contentType = "application/x-www-form-urlencoded" + } + + return s.Reader(), contentType, nil +} + +// detectContentType takes a string and returns the content type of the data by checking if it's a +// JSON or XML string. +func detectContentType(data []byte) string { + var v any + + if json.Unmarshal(data, &v) == nil { + return "application/json; charset=utf-8" + } else if xml.Unmarshal(data, &v) == nil { + return "application/xml; charset=utf-8" + } + + // other types like pdf etc.. + return http.DetectContentType(data) +} + +// buildMapBody accepts a map of string keys and values, and returns an io.Reader, content type +// string, and an error if any. +// It converts the map to a URL-encoded string and creates a strings.Reader from it. +func buildMapBody[T ~string, M ~map[T]T](m M) (io.Reader, string, error) { + // post data map[string]string{"aaa": "bbb", "ddd": "ccc"} + contentType := "application/x-www-form-urlencoded" + form := make(url.Values) + + for key, value := range m { + form.Add(string(key), string(value)) + } + + reader := g.String(form.Encode()).Reader() + + return reader, contentType, nil +} + +// buildMapOrdBody takes an ordered map with string keys and values (g.MapOrd[T, T]) +// and returns an io.Reader, a content type string, and an error if any. +// It encodes the map as an application/x-www-form-urlencoded string +// and creates a strings.Reader from the result. +// +// This is useful for building HTTP POST request bodies while preserving field order. +func buildMapOrdBody[T ~string](m g.MapOrd[T, T]) (io.Reader, string, error) { + contentType := "application/x-www-form-urlencoded" + + var buf strings.Builder + + m.Iter().ForEach(func(key, value T) { + if buf.Len() > 0 { + buf.WriteByte('&') + } + buf.WriteString(url.QueryEscape(string(key))) + buf.WriteByte('=') + buf.WriteString(url.QueryEscape(string(value))) + }) + + reader := strings.NewReader(buf.String()) + + return reader, contentType, nil +} + +// buildAnnotatedBody accepts data of any type and returns an io.Reader, content type string, and +// an error if any. It detects the data format by checking the struct tags and encodes the data in +// the corresponding format (JSON or XML). +func buildAnnotatedBody(data any) (io.Reader, string, error) { + var buf bytes.Buffer + + switch detectAnnotatedDataType(data) { + case "json": + if json.NewEncoder(&buf).Encode(data) == nil { + return &buf, "application/json; charset=utf-8", nil + } + case "xml": + if xml.NewEncoder(&buf).Encode(data) == nil { + return &buf, "application/xml; charset=utf-8", nil + } + } + + return nil, "", errors.New("data type not detected") +} + +// detectAnnotatedDataType takes data of any type and returns the data format as a string (either +// "json" or "xml") by checking the struct tags. +func detectAnnotatedDataType(data any) string { + t := reflect.TypeOf(data) + if t == nil { + return "" + } + + if t.Kind() == reflect.Ptr { + t = t.Elem() + } + + if t.Kind() != reflect.Struct { + return "" + } + + for i := range t.NumField() { + tag := t.Field(i).Tag + + if _, ok := tag.Lookup("json"); ok { + return "json" + } + + if _, ok := tag.Lookup("xml"); ok { + return "xml" + } + } + + return "" +} + +// sanitizeURL accepts a raw URL string and formats it to ensure it has an "http://" or "https://" +// prefix. +func sanitizeURL(rawURL g.String) string { + rawURL = rawURL.TrimSet(".") + + if !rawURL.StartsWithAny("http://", "https://") { + rawURL = rawURL.Prepend("http://") + } + + return rawURL.Std() +} + +// parseURL attempts to parse any supported rawURL type into a *url.URL. +// Returns an error if the type is unsupported or if parsing fails. +func parseURL(rawURL g.String) g.Result[*url.URL] { + if rawURL.Empty() { + return g.Err[*url.URL](errors.New("URL is empty")) + } + + parsedURL, err := url.Parse(rawURL.Std()) + if err != nil { + return g.Err[*url.URL](fmt.Errorf("failed to parse URL '%s': %w", rawURL, err)) + } + + return g.Ok(parsedURL) +} diff --git a/backend/vendor/github.com/enetx/surf/cookies.go b/backend/vendor/github.com/enetx/surf/cookies.go new file mode 100644 index 0000000..20c193f --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/cookies.go @@ -0,0 +1,36 @@ +package surf + +import ( + "regexp" + + "github.com/enetx/g" + "github.com/enetx/http" +) + +// Cookies represents a list of HTTP Cookies. +type Cookies []*http.Cookie + +// Contains checks if the cookies collection contains a cookie that matches the provided pattern. +// The pattern parameter can be either a string or a pointer to a regexp.Regexp object. +// The method returns true if a matching cookie is found and false otherwise. +func (cs *Cookies) Contains(pattern any) bool { + for _, cookie := range *cs { + c := g.String(cookie.String()).Lower() + switch p := pattern.(type) { + case string: + if c.Contains(g.String(p).Lower()) { + return true + } + case g.String: + if c.Contains(p.Lower()) { + return true + } + case *regexp.Regexp: + if c.Regexp().Match(p) { + return true + } + } + } + + return false +} diff --git a/backend/vendor/github.com/enetx/surf/debug.go b/backend/vendor/github.com/enetx/surf/debug.go new file mode 100644 index 0000000..6bea313 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/debug.go @@ -0,0 +1,63 @@ +package surf + +import ( + "io" + + "github.com/enetx/g" + "github.com/enetx/http/httputil" +) + +// Debug is a struct that holds debugging information for an HTTP response. +type Debug struct { + print g.Builder // Debug information text. + resp Response // Associated Response. +} + +// Debug returns a debug instance associated with a Response. +func (resp Response) Debug() *Debug { return &Debug{resp: resp} } + +// Print prints the debug information. +func (d *Debug) Print() { g.Println(d.print.String()) } + +// Request appends the request details to the debug information. +func (d *Debug) Request(verbos ...bool) *Debug { + body, err := httputil.DumpRequestOut(d.resp.request.request, false) + if err != nil { + return d + } + + if d.print.Len() != 0 { + _ = g.Write(&d.print, "\n") + } + + _ = g.Writeln(&d.print, "{}", g.String(body).Trim()) + + if len(verbos) != 0 && verbos[0] && d.resp.request.body != nil { + if bytes, err := io.ReadAll(d.resp.request.body); err == nil { + reqBody := g.Bytes(bytes).Trim() + _ = g.Writeln(&d.print, "\n{}", reqBody.String()) + } + } + + return d +} + +// Response appends the response details to the debug information. +func (d *Debug) Response(verbos ...bool) *Debug { + body, err := httputil.DumpResponse(d.resp.response, false) + if err != nil { + return d + } + + if d.print.Len() != 0 { + _ = g.Write(&d.print, "\n") + } + + _ = g.Write(&d.print, g.String(body).Trim()) + + if len(verbos) != 0 && verbos[0] && d.resp.Body != nil { + _ = g.Write(&d.print, d.resp.Body.String().Trim().Prepend("\n\n")) + } + + return d +} diff --git a/backend/vendor/github.com/enetx/surf/defaults.go b/backend/vendor/github.com/enetx/surf/defaults.go new file mode 100644 index 0000000..946fd1f --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/defaults.go @@ -0,0 +1,53 @@ +package surf + +import "time" + +// Default configuration constants for the surf HTTP client. +// These values provide sensible defaults for connection management, timeouts, and client behavior. +const ( + // _userAgent is the default User-Agent header for HTTP requests. + // Uses a modern Chrome browser signature to ensure compatibility with most web services. + _userAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36" + + // _maxRedirects is the default maximum number of redirects to follow. + // Prevents infinite redirect loops while allowing reasonable redirect chains. + _maxRedirects = 10 + + // _maxWorkers is the default maximum number of concurrent workers for parallel requests. + // Balances throughput with resource consumption for concurrent operations. + _maxWorkers = 10 + + // _dialerTimeout is the default timeout for establishing network connections. + // Prevents hanging on unresponsive servers during connection establishment. + _dialerTimeout = 30 * time.Second + + // _clientTimeout is the default overall timeout for complete HTTP requests. + // Includes connection time, request transmission, and response reading. + _clientTimeout = 30 * time.Second + + // _TCPKeepAlive is the default TCP keep-alive interval for established connections. + // Maintains connection health and detects broken connections. + _TCPKeepAlive = 15 * time.Second + + // _idleConnTimeout is the default timeout for idle connections in the pool. + // Prevents resource leaks by closing stale connections. + _idleConnTimeout = 20 * time.Second + + // _maxIdleConns is the default maximum number of idle connections across all hosts. + // Controls overall connection pool size and memory usage. + _maxIdleConns = 512 + + // _maxConnsPerHost is the default maximum number of connections per individual host. + // Prevents overwhelming any single server with too many concurrent connections. + _maxConnsPerHost = 128 + + // _maxIdleConnsPerHost is the default maximum number of idle connections per host. + // Maintains connection efficiency while controlling per-host resource usage. + _maxIdleConnsPerHost = 128 + + // defaultHTTPPort is the implicit port for plain HTTP URLs without an explicit port. + defaultHTTPPort = "80" + + // defaultHTTPSPort is the implicit port for HTTPS (TLS) URLs without an explicit port. + defaultHTTPSPort = "443" +) diff --git a/backend/vendor/github.com/enetx/surf/dnsovertls.go b/backend/vendor/github.com/enetx/surf/dnsovertls.go new file mode 100644 index 0000000..5dc9cc5 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/dnsovertls.go @@ -0,0 +1,120 @@ +package surf + +import ( + "context" + "crypto/tls" + "net" + "time" + + "github.com/enetx/g" +) + +// https://adguard-dns.io/kb/general/dns-providers/ + +// DNSOverTLS is a configuration struct for DNS over TLS settings. +type DNSOverTLS struct{ builder *Builder } + +// AdGuard sets up DNS over TLS with AdGuard DNS. +func (dot *DNSOverTLS) AdGuard() *Builder { + return dot.AddProvider("dns.adguard-dns.com", "94.140.14.14:853", "94.140.15.15:853") +} + +// Google sets up DNS over TLS with Google Public DNS. +func (dot *DNSOverTLS) Google() *Builder { + return dot.AddProvider("dns.google", "8.8.8.8:853", "8.8.4.4:853") +} + +// Cloudflare sets up DNS over TLS with Cloudflare DNS. +func (dot *DNSOverTLS) Cloudflare() *Builder { + return dot.AddProvider("1dot1dot1dot1.cloudflare-dns.com", "1.1.1.1:853", "1.0.0.1:853") +} + +// Quad9 sets up DNS over TLS with Quad9 DNS. +func (dot *DNSOverTLS) Quad9() *Builder { + return dot.AddProvider("dns.quad9.net", "9.9.9.9:853", "149.112.112.112:853") +} + +// Switch sets up DNS over TLS with SWITCH DNS. +func (dot *DNSOverTLS) Switch() *Builder { + return dot.AddProvider("dns.switch.ch", "130.59.31.248:853", "130.59.31.251:853") +} + +// CIRAShield sets up DNS over TLS with CIRA Canadian Shield DNS. +func (dot *DNSOverTLS) CIRAShield() *Builder { + return dot.AddProvider( + "private.canadianshield.cira.ca", + "149.112.121.10:853", + "149.112.122.10:853", + ) +} + +// Ali sets up DNS over TLS with AliDNS. +func (dot *DNSOverTLS) Ali() *Builder { + return dot.AddProvider("dns.alidns.com", "223.5.5.5:853", "223.6.6.6:853") +} + +// Quad101 sets up DNS over TLS with Quad101 DNS. +func (dot *DNSOverTLS) Quad101() *Builder { + return dot.AddProvider("101.101.101.101", "101.101.101.101:853", "101.102.103.104:853") +} + +// SB sets up DNS over TLS with Secure DNS (dot.sb). +func (dot *DNSOverTLS) SB() *Builder { + return dot.AddProvider("dot.sb", "185.222.222.222:853", "45.11.45.11:853") +} + +// Forge sets up DNS over TLS with DNS Forge. +func (dot *DNSOverTLS) Forge() *Builder { + return dot.AddProvider("dnsforge.de", "176.9.93.198:853", "176.9.1.117:853") +} + +// LibreDNS sets up DNS over TLS with LibreDNS. +func (dot *DNSOverTLS) LibreDNS() *Builder { + return dot.AddProvider("dot.libredns.gr", "116.202.176.26:853") +} + +// resolver returns a custom net.Resolver that uses a dial function to create a secure connection +// to the DNS server using DNS over TLS. +func (DNSOverTLS) resolver(serverName g.String, addresses ...g.String) *net.Resolver { + return &net.Resolver{PreferGo: true, Dial: dial(serverName.Std(), g.SliceOf(addresses...).ToStringSlice()...)} +} + +// AddProvider sets up DNS over TLS with a custom DNS provider. +// It configures a custom net.Resolver using the resolver method. +func (dot *DNSOverTLS) AddProvider(serverName g.String, addresses ...g.String) *Builder { + resolver := dot.resolver(serverName, addresses...) + return dot.builder.addCliMW(func(client *Client) error { return dnsTLSMW(client, resolver) }, 0) +} + +// dial returns a dial function that establishes a secure connection to a random DNS server address +// from the given list using DNS over TLS. +func dial(serverName string, addresses ...string) func(context.Context, string, string) (net.Conn, error) { + return func(ctx context.Context, _, _ string) (net.Conn, error) { + var ( + dialer net.Dialer + conn net.Conn + err error + ) + + for _, address := range addresses { + conn, err = dialer.DialContext(ctx, "tcp", address) + if err == nil { + break + } + } + + if err != nil { + return nil, err + } + + const keepAlivePeriod = 3 * time.Minute + + _ = conn.(*net.TCPConn).SetKeepAlive(true) + _ = conn.(*net.TCPConn).SetKeepAlivePeriod(keepAlivePeriod) + + return tls.Client(conn, &tls.Config{ + ServerName: serverName, + ClientSessionCache: tls.NewLRUClientSessionCache(0), + }), nil + } +} diff --git a/backend/vendor/github.com/enetx/surf/errors.go b/backend/vendor/github.com/enetx/surf/errors.go new file mode 100644 index 0000000..95ec392 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/errors.go @@ -0,0 +1,35 @@ +package surf + +import "fmt" + +// Custom error types for surf HTTP client operations. +// These errors provide specific information about different failure scenarios +// that can occur during HTTP requests and responses. + +type ( + // ErrWebSocketUpgrade indicates that a request received a WebSocket upgrade response. + // This error is returned when the server responds with HTTP 101 Switching Protocols + // for WebSocket connections, which require special handling. + ErrWebSocketUpgrade struct{ Msg string } + + // ErrUserAgentType indicates an invalid user agent type was provided. + // This error is returned when the user agent parameter is not of a supported type + // (string, g.String, slices, etc.). + ErrUserAgentType struct{ Msg string } + + // Err101ResponseCode indicates a 101 Switching Protocols response was received. + // This error is used to handle HTTP 101 responses that require protocol upgrades. + Err101ResponseCode struct{ Msg string } +) + +func (e *ErrWebSocketUpgrade) Error() string { + return fmt.Sprintf("%s received an unexpected response, switching protocols to WebSocket", e.Msg) +} + +func (e *ErrUserAgentType) Error() string { + return fmt.Sprintf("unsupported user agent type: %s", e.Msg) +} + +func (e *Err101ResponseCode) Error() string { + return fmt.Sprintf("%s received a 101 response status code", e.Msg) +} diff --git a/backend/vendor/github.com/enetx/surf/header/name.go b/backend/vendor/github.com/enetx/surf/header/name.go new file mode 100644 index 0000000..3c406b7 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/header/name.go @@ -0,0 +1,93 @@ +package header + +const ( + ACCEPT = "accept" + ACCEPT_CHARSET = "accept-charset" + ACCEPT_ENCODING = "accept-encoding" + ACCEPT_LANGUAGE = "accept-language" + ACCEPT_RANGES = "accept-ranges" + ACCESS_CONTROL_ALLOW_CREDENTIALS = "access-control-allow-credentials" + ACCESS_CONTROL_ALLOW_HEADERS = "access-control-allow-headers" + ACCESS_CONTROL_ALLOW_METHODS = "access-control-allow-methods" + ACCESS_CONTROL_ALLOW_ORIGIN = "access-control-allow-origin" + ACCESS_CONTROL_EXPOSE_HEADERS = "access-control-expose-headers" + ACCESS_CONTROL_MAX_AGE = "access-control-max-age" + ACCESS_CONTROL_REQUEST_HEADERS = "access-control-request-headers" + ACCESS_CONTROL_REQUEST_METHOD = "access-control-request-method" + AGE = "age" + ALLOW = "allow" + ALT_SVC = "alt-svc" + AUTHORIZATION = "authorization" + CACHE_CONTROL = "cache-control" + CACHE_STATUS = "cache-status" + CDN_CACHE_CONTROL = "cdn-cache-control" + CONNECTION = "connection" + CONTENT_DISPOSITION = "content-disposition" + CONTENT_ENCODING = "content-encoding" + CONTENT_LANGUAGE = "content-language" + CONTENT_LENGTH = "content-length" + CONTENT_LOCATION = "content-location" + CONTENT_RANGE = "content-range" + CONTENT_SECURITY_POLICY = "content-security-policy" + CONTENT_SECURITY_POLICY_REPORT_ONLY = "content-security-policy-report-only" + CONTENT_TYPE = "content-type" + COOKIE = "cookie" + DNT = "dnt" + DATE = "date" + ETAG = "etag" + EXPECT = "expect" + EXPIRES = "expires" + FORWARDED = "forwarded" + FROM = "from" + HOST = "host" + IF_MATCH = "if-match" + IF_MODIFIED_SINCE = "if-modified-since" + IF_NONE_MATCH = "if-none-match" + IF_RANGE = "if-range" + IF_UNMODIFIED_SINCE = "if-unmodified-since" + LAST_MODIFIED = "last-modified" + LINK = "link" + LOCATION = "location" + MAX_FORWARDS = "max-forwards" + ORIGIN = "origin" + PRAGMA = "pragma" + PRIORITY = "priority" + PROXY_AUTHENTICATE = "proxy-authenticate" + PROXY_AUTHORIZATION = "proxy-authorization" + PUBLIC_KEY_PINS = "public-key-pins" + PUBLIC_KEY_PINS_REPORT_ONLY = "public-key-pins-report-only" + RANGE = "range" + REFERER = "referer" + REFERRER_POLICY = "referrer-policy" + REFRESH = "refresh" + RETRY_AFTER = "retry-after" + SEC_CH_UA = "sec-ch-ua" + SEC_CH_UA_MOBILE = "sec-ch-ua-mobile" + SEC_CH_UA_PLATFORM = "sec-ch-ua-platform" + SEC_FETCH_SITE = "sec-fetch-site" + SEC_FETCH_MODE = "sec-fetch-mode" + SEC_FETCH_USER = "sec-fetch-user" + SEC_FETCH_DEST = "sec-fetch-dest" + SEC_WEBSOCKET_ACCEPT = "sec-websocket-accept" + SEC_WEBSOCKET_EXTENSIONS = "sec-websocket-extensions" + SEC_WEBSOCKET_KEY = "sec-websocket-key" + SEC_WEBSOCKET_PROTOCOL = "sec-websocket-protocol" + SEC_WEBSOCKET_VERSION = "sec-websocket-version" + SERVER = "server" + SET_COOKIE = "set-cookie" + STRICT_TRANSPORT_SECURITY = "strict-transport-security" + TE = "te" + TRAILER = "trailer" + TRANSFER_ENCODING = "transfer-encoding" + USER_AGENT = "user-agent" + UPGRADE = "upgrade" + UPGRADE_INSECURE_REQUESTS = "upgrade-insecure-requests" + VARY = "vary" + VIA = "via" + WARNING = "warning" + WWW_AUTHENTICATE = "www-authenticate" + X_CONTENT_TYPE_OPTIONS = "x-content-type-options" + X_DNS_PREFETCH_CONTROL = "x-dns-prefetch-control" + X_FRAME_OPTIONS = "x-frame-options" + X_XSS_PROTECTION = "x-xss-protection" +) diff --git a/backend/vendor/github.com/enetx/surf/headers.go b/backend/vendor/github.com/enetx/surf/headers.go new file mode 100644 index 0000000..c9c01df --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/headers.go @@ -0,0 +1,65 @@ +package surf + +import ( + "net/textproto" + "regexp" + + "github.com/enetx/g" + "github.com/enetx/http" +) + +// Headers represents a collection of HTTP Headers. +type Headers http.Header + +// Contains checks if the header contains any of the specified patterns. +// It accepts a header name and a pattern (or list of patterns) and returns a boolean value +// indicating whether any of the patterns are found in the header values. +// The patterns can be a string, a slice of strings, or a slice of *regexp.Regexp. +func (h Headers) Contains(header g.String, patterns any) bool { + if h.Values(header) != nil { + for _, value := range h.Values(header) { + v := value.Lower() + switch ps := patterns.(type) { + case string: + if v.Contains(g.String(ps).Lower()) { + return true + } + case g.String: + if v.Contains(ps.Lower()) { + return true + } + case []string: + if v.ContainsAny(g.TransformSlice(ps, g.NewString).Iter().Map(g.String.Lower).Collect()...) { + return true + } + case g.Slice[string]: + if v.ContainsAny(g.TransformSlice(ps, g.NewString).Iter().Map(g.String.Lower).Collect()...) { + return true + } + case g.Slice[g.String]: + if v.ContainsAny(ps.Iter().Map(g.String.Lower).Collect()...) { + return true + } + case []*regexp.Regexp: + if v.Regexp().MatchAny(ps...) { + return true + } + } + } + } + + return false +} + +// Values returns the values associated with a specified header key. +// It wraps the Values method from the textproto.MIMEHeader type. +func (h Headers) Values(key g.String) g.Slice[g.String] { + return g.TransformSlice(textproto.MIMEHeader(h).Values(key.Std()), g.NewString) +} + +// Get returns the first value associated with a specified header key. +// It wraps the Get method from the textproto.MIMEHeader type. +func (h Headers) Get(key g.String) g.String { return g.String(textproto.MIMEHeader(h).Get(key.Std())) } + +// Clone returns a copy of Headers or nil if Headers is nil. +func (h Headers) Clone() Headers { return Headers(http.Header(h).Clone()) } diff --git a/backend/vendor/github.com/enetx/surf/http2s.go b/backend/vendor/github.com/enetx/surf/http2s.go new file mode 100644 index 0000000..0ff0803 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/http2s.go @@ -0,0 +1,137 @@ +package surf + +import ( + "github.com/enetx/http" + "github.com/enetx/http2" +) + +// HTTP2Settings represents HTTP/2 settings. +// https://lwthiker.com/networks/2022/06/17/http2-fingerprinting.html +type HTTP2Settings struct { + builder *Builder + priorityFrames []http2.PriorityFrame + priorityParam http2.PriorityParam + headerTableSize uint32 + enablePush uint32 + maxConcurrentStreams uint32 + initialWindowSize uint32 + maxFrameSize uint32 + maxHeaderListSize uint32 + connectionFlow uint32 + usePush bool +} + +// HeaderTableSize sets the header table size for HTTP/2 settings. +func (h *HTTP2Settings) HeaderTableSize(size uint32) *HTTP2Settings { + h.headerTableSize = size + return h +} + +// EnablePush enables HTTP/2 server push functionality. +func (h *HTTP2Settings) EnablePush(size uint32) *HTTP2Settings { + h.usePush = true + h.enablePush = size + return h +} + +// MaxConcurrentStreams sets the maximum number of concurrent streams in HTTP/2. +func (h *HTTP2Settings) MaxConcurrentStreams(size uint32) *HTTP2Settings { + h.maxConcurrentStreams = size + return h +} + +// InitialWindowSize sets the initial window size for HTTP/2 streams. +func (h *HTTP2Settings) InitialWindowSize(size uint32) *HTTP2Settings { + h.initialWindowSize = size + return h +} + +// MaxFrameSize sets the maximum frame size for HTTP/2 frames. +func (h *HTTP2Settings) MaxFrameSize(size uint32) *HTTP2Settings { + h.maxFrameSize = size + return h +} + +// MaxHeaderListSize sets the maximum size of the header list in HTTP/2. +func (h *HTTP2Settings) MaxHeaderListSize(size uint32) *HTTP2Settings { + h.maxHeaderListSize = size + return h +} + +// ConnectionFlow sets the flow control for the HTTP/2 connection. +func (h *HTTP2Settings) ConnectionFlow(size uint32) *HTTP2Settings { + h.connectionFlow = size + return h +} + +// PriorityParam sets the priority parameter for HTTP/2. +func (h *HTTP2Settings) PriorityParam(priorityParam http2.PriorityParam) *HTTP2Settings { + h.priorityParam = priorityParam + return h +} + +// PriorityFrames sets the priority frames for HTTP/2. +func (h *HTTP2Settings) PriorityFrames(priorityFrames []http2.PriorityFrame) *HTTP2Settings { + h.priorityFrames = priorityFrames + return h +} + +// Set applies the accumulated HTTP/2 settings. +// It configures the HTTP/2 settings for the surf client. +func (h *HTTP2Settings) Set() *Builder { + if h.builder.forceHTTP1 { + return h.builder + } + + return h.builder.addCliMW(func(c *Client) error { + t1, ok := c.GetTransport().(*http.Transport) + if !ok { + return nil + } + + t1.ForceAttemptHTTP2 = true + t2, err := http2.ConfigureTransports(t1) + if err != nil { + return err + } + + appendSetting := func(id http2.SettingID, val uint32) { + if val != 0 || (id == http2.SettingEnablePush && h.usePush) { + t2.Settings = append(t2.Settings, http2.Setting{ID: id, Val: val}) + } + } + + settings := [...]struct { + id http2.SettingID + val uint32 + }{ + {http2.SettingHeaderTableSize, h.headerTableSize}, + {http2.SettingEnablePush, h.enablePush}, + {http2.SettingMaxConcurrentStreams, h.maxConcurrentStreams}, + {http2.SettingInitialWindowSize, h.initialWindowSize}, + {http2.SettingMaxFrameSize, h.maxFrameSize}, + {http2.SettingMaxHeaderListSize, h.maxHeaderListSize}, + } + + for _, s := range settings { + appendSetting(s.id, s.val) + } + + if h.connectionFlow != 0 { + t2.ConnectionFlow = h.connectionFlow + } + + if !h.priorityParam.IsZero() { + t2.PriorityParam = h.priorityParam + } + + if h.priorityFrames != nil { + t2.PriorityFrames = h.priorityFrames + } + + t1.H2transport = t2 + c.transport = t1 + + return nil + }, 0) +} diff --git a/backend/vendor/github.com/enetx/surf/http3s.go b/backend/vendor/github.com/enetx/surf/http3s.go new file mode 100644 index 0000000..0acc2a2 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/http3s.go @@ -0,0 +1,615 @@ +// Package surf provides HTTP/3 support with full uQUIC fingerprinting for advanced web scraping and automation. +// This file implements HTTP/3 transport with complete QUIC Initial Packet + TLS ClientHello fingerprinting, +// SOCKS5 proxy support, and automatic fallback to HTTP/2 for non-SOCKS5 proxies. +package surf + +import ( + "context" + "crypto/tls" + "fmt" + "math" + "math/rand" + "net" + "net/url" + "strconv" + "time" + + "github.com/enetx/g" + "github.com/enetx/g/ref" + "github.com/enetx/http" + "github.com/enetx/surf/pkg/quicconn" + uquic "github.com/enetx/uquic" + "github.com/enetx/uquic/http3" + utls "github.com/enetx/utls" + "github.com/wzshiming/socks5" +) + +// HTTP3Settings represents HTTP/3 settings with uQUIC fingerprinting support. +type HTTP3Settings struct { + builder *Builder + quicID *uquic.QUICID + quicSpec *uquic.QUICSpec +} + +// Chrome configures HTTP/3 settings to mimic Chrome browser. +func (h *HTTP3Settings) Chrome() *HTTP3Settings { + h.quicID = &uquic.QUICChrome_115 + return h +} + +// Firefox configures HTTP/3 settings to mimic Firefox browser. +func (h *HTTP3Settings) Firefox() *HTTP3Settings { + h.quicID = &uquic.QUICFirefox_116 + return h +} + +// SetQUICID sets a custom QUIC ID for fingerprinting. +func (h *HTTP3Settings) SetQUICID(quicID uquic.QUICID) *HTTP3Settings { + h.quicID = &quicID + return h +} + +// SetQUICSpec sets a custom QUIC spec for advanced fingerprinting. +func (h *HTTP3Settings) SetQUICSpec(quicSpec uquic.QUICSpec) *HTTP3Settings { + h.quicSpec = &quicSpec + return h +} + +// getQUICSpec returns the QUIC spec either from custom spec or by converting QUICID. +// Returns None if neither custom spec nor QUICID is configured or conversion fails. +func (h *HTTP3Settings) getQUICSpec() g.Option[uquic.QUICSpec] { + if h.quicSpec != nil { + return g.Some(*h.quicSpec) + } + + if h.quicID != nil { + if spec, err := uquic.QUICID2Spec(*h.quicID); err == nil { + return g.Some(spec) + } + } + + return g.None[uquic.QUICSpec]() +} + +// Set applies the accumulated HTTP/3 settings. +// It configures the uQUIC transport for the surf client. +func (h *HTTP3Settings) Set() *Builder { + if h.builder.forceHTTP1 { + return h.builder + } + + return h.builder.addCliMW(func(c *Client) error { + if !h.builder.singleton { + h.builder.addRespMW(closeIdleConnectionsMW, 0) + } + + quicSpec := h.getQUICSpec() + if quicSpec.IsNone() { + return nil + } + + tlsConfig := c.tlsConfig.Clone() + + transport := &uquicTransport{ + quicSpec: ref.Of(quicSpec.Some()), + tlsConfig: tlsConfig, + dialer: c.GetDialer(), + proxy: h.builder.proxy, + fallbackTransport: c.GetTransport(), + cachedConnections: g.NewMapSafe[string, *connection](), + cachedTransports: g.NewMapSafe[string, http.RoundTripper](), + } + + switch v := h.builder.proxy.(type) { + case string: + transport.staticProxy = v + transport.isDynamic = false + case g.String: + transport.staticProxy = v.Std() + transport.isDynamic = false + default: + transport.isDynamic = true + } + + c.GetClient().Transport = transport + c.transport = transport + + return nil + }, math.MaxInt) +} + +type connection struct { + packetConn net.PacketConn + quicConn uquic.Connection +} + +// uquicTransport implements http.RoundTripper using uQUIC fingerprinting for HTTP/3. +// It provides full QUIC Initial Packet + TLS ClientHello fingerprinting capabilities, +// SOCKS5 proxy compatibility, and automatic fallback to HTTP/2 for non-SOCKS5 proxies. +// The transport supports both static and dynamic proxy configurations with connection caching. +type uquicTransport struct { + quicSpec *uquic.QUICSpec // QUIC specification for fingerprinting + tlsConfig *tls.Config // TLS configuration for QUIC connections + dialer *net.Dialer // Network dialer (may contain custom DNS resolver) + proxy any // Proxy configuration (static or dynamic function) + staticProxy string // Cached static proxy URL for performance + isDynamic bool // Flag indicating if proxy is dynamic (disables caching) + cachedConnections *g.MapSafe[string, *connection] + cachedTransports *g.MapSafe[string, http.RoundTripper] // Per-address HTTP/3 transport cache + fallbackTransport http.RoundTripper // HTTP/2 transport for non-SOCKS5 proxy fallback +} + +// CloseIdleConnections closes all cached HTTP/3 connections and clears the cache. +// It also attempts to close idle connections on the fallback transport if available. +func (ut *uquicTransport) CloseIdleConnections() { + for k, transport := range ut.cachedTransports.Iter() { + // Check if transport implements CloseIdleConnections + switch t := transport.(type) { + case *http3.RoundTripper: + t.CloseIdleConnections() + case *http3.URoundTripper: + t.CloseIdleConnections() + } + + ut.cachedTransports.Delete(k) + } + + for id, c := range ut.cachedConnections.Iter() { + if c.quicConn != nil { + _ = c.quicConn.CloseWithError(0, "idle close") + } + + if c.packetConn != nil { + _ = c.packetConn.Close() + } + + ut.cachedConnections.Delete(id) + } + + if ut.fallbackTransport != nil { + if closer, ok := ut.fallbackTransport.(interface{ CloseIdleConnections() }); ok { + closer.CloseIdleConnections() + } + } +} + +func (ut *uquicTransport) address(req *http.Request) string { + host, port, err := net.SplitHostPort(req.URL.Host) + if err == nil { + return net.JoinHostPort(host, port) + } + + var defaultPort string + + switch g.String(req.URL.Scheme).Lower() { + case "http": + defaultPort = defaultHTTPPort + case "https": + defaultPort = defaultHTTPSPort + default: + defaultPort = defaultHTTPSPort + } + + return net.JoinHostPort(req.URL.Host, defaultPort) +} + +// createH3 returns per-address cached http3.Transport with proper Dial & SNI configuration. +// Caching is disabled for dynamic proxy configurations to ensure proper proxy rotation. +func (ut *uquicTransport) createH3(req *http.Request, addr, proxy string) http.RoundTripper { + key := addr + if proxy != "" { + key = proxy + "|" + addr + } + + // Skip cache for dynamic proxy providers to ensure proxy rotation works correctly + if !ut.isDynamic { + if tr := ut.cachedTransports.Get(key); tr.IsSome() { + return tr.Some() + } + } + + // Create uquic/http3 RoundTripper (with or without full QUIC fingerprinting) + base := &http3.RoundTripper{ + TLSClientConfig: tlsToUTLS(ut.tlsConfig), + QuicConfig: &uquic.Config{}, + } + + var h3 http.RoundTripper + if ut.quicSpec != nil { + h3 = http3.GetURoundTripper(base, ut.quicSpec, nil) + } else { + h3 = base + } + + if (ut.dialer != nil && ut.dialer.Resolver != nil) || proxy != "" { + hostname := req.URL.Hostname() + + // Create common dial function + dialFunc := func(ctx context.Context, quicAddr string, tlsCfg *utls.Config, cfg *uquic.Config) (uquic.EarlyConnection, error) { + if tlsCfg == nil { + tlsCfg = &utls.Config{} + } + + if tlsCfg.ServerName == "" { + if hn := hostname; hn != "" && net.ParseIP(hn) == nil { + clone := tlsCfg.Clone() + clone.ServerName = hn + tlsCfg = clone + } + } + + if proxy != "" { + return ut.dialSOCKS5(ctx, quicAddr, tlsCfg, cfg, proxy) + } + return ut.dialDNS(ctx, quicAddr, tlsCfg, cfg) + } + + // Configure custom dial function for uquic/http3 + switch rt := h3.(type) { + case *http3.URoundTripper: + if rt.RoundTripper != nil { + rt.RoundTripper.Dial = dialFunc + } + rt.Dial = dialFunc + case *http3.RoundTripper: + rt.Dial = dialFunc + } + } + + // Only cache transport if not using dynamic proxy provider + if !ut.isDynamic { + ut.cachedTransports.Set(key, h3) + } + + return h3 +} + +// resolve always resolves host:port to ip:port. +// Uses custom resolver when provided, otherwise the system resolver. +func (ut *uquicTransport) resolve(ctx context.Context, address string) (string, error) { + host, port, err := net.SplitHostPort(address) + if err != nil { + return "", fmt.Errorf("invalid address format: %w", err) + } + + // Skip resolution for IP addresses + if ip := net.ParseIP(host); ip != nil { + return address, nil + } + + r := net.DefaultResolver + if ut.dialer != nil && ut.dialer.Resolver != nil { + r = ut.dialer.Resolver + } + + ips, err := r.LookupIPAddr(ctx, host) + if err != nil { + return "", fmt.Errorf("lookup failed for %q: %w", host, err) + } + + if len(ips) == 0 { + return "", &net.DNSError{Err: "no IP addresses found", Name: host} + } + + // Prefer IPv4 addresses for better compatibility + for _, ipa := range ips { + if v4 := ipa.IP.To4(); v4 != nil { + return net.JoinHostPort(v4.String(), port), nil + } + } + + // Fallback to first IPv6 address + return net.JoinHostPort(ips[0].IP.String(), port), nil +} + +const ( + minPort = 1 + maxPort = 65535 +) + +// parsedAddr represents validated network address components +type parsedAddr struct { + IP net.IP + Port int +} + +// parseResolvedAddress validates and parses a resolved address +func parseResolvedAddress(resolved string) (*parsedAddr, error) { + host, portStr, err := net.SplitHostPort(resolved) + if err != nil { + return nil, fmt.Errorf("split host/port: %w", err) + } + + port, err := strconv.Atoi(portStr) + if err != nil { + return nil, fmt.Errorf("parse port %q: %w", portStr, err) + } + + if port < minPort || port > maxPort { + return nil, fmt.Errorf("port %d out of valid range [%d-%d]", port, minPort, maxPort) + } + + ip := net.ParseIP(host) + if ip == nil { + return nil, fmt.Errorf("invalid IP address: %q", host) + } + + return &parsedAddr{ + IP: ip, + Port: port, + }, nil +} + +// createUDPListener creates a UDP listener with fallback support +func createUDPListener(preferredNetwork string) (*net.UDPConn, error) { + // Try preferred network first + conn, err := net.ListenUDP(preferredNetwork, nil) + if err == nil { + return conn, nil + } + + // If specific version failed, try generic UDP + if preferredNetwork != "udp" { + conn, err = net.ListenUDP("udp", nil) + if err == nil { + return conn, nil + } + } + + return nil, fmt.Errorf("failed to create UDP listener on %s: %w", preferredNetwork, err) +} + +// RoundTrip implements the http.RoundTripper interface with HTTP/3 support and automatic proxy fallback. +// For non-SOCKS5 proxies, it automatically falls back to the HTTP/2 transport. +// Dynamic proxy configurations are evaluated on each request for proper rotation. +func (ut *uquicTransport) RoundTrip(req *http.Request) (*http.Response, error) { + var proxy string + + if ut.isDynamic { + if p := ut.getProxy(); p.IsSome() { + proxy = p.Some() + } + } else { + proxy = ut.staticProxy + } + + if proxy != "" && !isSOCKS5(proxy) && ut.fallbackTransport != nil { + return ut.fallbackTransport.RoundTrip(req) + } + + if req.URL.Scheme == "" { + clone := *req.URL + clone.Scheme = "https" + req.URL = &clone + } + + addr := ut.address(req) + h3 := ut.createH3(req, addr, proxy) + + return h3.RoundTrip(req) +} + +// getProxy extracts proxy URL from configured proxy source. +// Supports static (string, []string) and dynamic (func() g.String) configurations. +// Returns g.Option[string] - Some(proxy_url) if proxy is available, None if no proxy is configured. +func (ut *uquicTransport) getProxy() g.Option[string] { + var p string + + switch v := ut.proxy.(type) { + case func() g.String: + p = v().Std() + case string: + p = v + case g.String: + p = v.Std() + case []string: + if len(v) > 0 { + p = v[rand.Intn(len(v))] + } + case g.Slice[string]: + p = v.Random() + case g.Slice[g.String]: + p = v.Random().Std() + } + + if p != "" { + return g.Some(p) + } + + return g.None[string]() +} + +// tlsToUTLS converts standard tls.Config to utls.Config with minimal compatibility +func tlsToUTLS(tlsConf *tls.Config) *utls.Config { + if tlsConf == nil { + return &utls.Config{} + } + + return &utls.Config{ + ServerName: tlsConf.ServerName, + InsecureSkipVerify: tlsConf.InsecureSkipVerify, + NextProtos: tlsConf.NextProtos, + RootCAs: tlsConf.RootCAs, + MinVersion: tlsConf.MinVersion, + MaxVersion: tlsConf.MaxVersion, + CipherSuites: tlsConf.CipherSuites, + } +} + +// dialSOCKS5 establishes a QUIC connection through a SOCKS5 proxy (for uquic) +func (ut *uquicTransport) dialSOCKS5( + ctx context.Context, + address string, + tlsConfig *utls.Config, + cfg *uquic.Config, + proxy string, +) (uquic.EarlyConnection, error) { + // Validate proxy URL + proxyURL, err := url.Parse(proxy) + if err != nil { + return nil, fmt.Errorf("parse proxy URL: %w", err) + } + + // Create SOCKS5 dialer + dialer, err := socks5.NewDialer(proxyURL.String()) + if err != nil { + return nil, fmt.Errorf("create SOCKS5 dialer: %w", err) + } + + // Resolve target address + resolved, err := ut.resolve(ctx, address) + if err != nil { + return nil, fmt.Errorf("resolve address: %w", err) + } + + // Establish SOCKS5 UDP associate + conn, err := dialer.DialContext(ctx, "udp", resolved) + if err != nil { + return nil, fmt.Errorf("SOCKS5 UDP associate: %w", err) + } + + // Ensure cleanup on error + success := false + + defer func() { + if !success { + _ = conn.Close() + } + }() + + proxyUDP, err := net.ResolveUDPAddr("udp", conn.RemoteAddr().String()) + if err != nil { + return nil, fmt.Errorf("socks5 get proxy UDP addr: %w", err) + } + + // Create packet connection wrapper + packetConn := quicconn.New(conn, proxyUDP, quicconn.EncapRaw) + + // Ensure QUIC config exists + if cfg == nil { + cfg = &uquic.Config{} + } + + // Establish QUIC connection with uquic + quicConn, err := uquic.DialEarly(ctx, packetConn, proxyUDP, tlsConfig, cfg) + if err != nil { + _ = packetConn.Close() + return nil, fmt.Errorf("QUIC dial failed: %w", err) + } + + success = true + + // Cache connection for reuse + if ut.cachedConnections != nil { + key := quicconn.ConnKey(packetConn) + ut.cachedConnections.Set(key, &connection{ + packetConn: packetConn, + quicConn: quicConn, + }) + } + + return quicConn, nil +} + +// dialDNS establishes a QUIC connection using custom DNS resolver (for uquic) +func (ut *uquicTransport) dialDNS( + ctx context.Context, + address string, + tlsConfig *utls.Config, + cfg *uquic.Config, +) (uquic.EarlyConnection, error) { + // Resolve address using custom DNS + resolved, err := ut.resolve(ctx, address) + if err != nil { + return nil, fmt.Errorf("DNS resolution failed: %w", err) + } + + // Parse and validate resolved address + addr, err := parseResolvedAddress(resolved) + if err != nil { + return nil, err + } + + // Determine optimal network type + network := "udp" + if addr.IP.To4() != nil { + network = "udp4" + } else if addr.IP.To16() != nil { + network = "udp6" + } + + // Create UDP listener with fallback + udpConn, err := createUDPListener(network) + if err != nil { + return nil, fmt.Errorf("create UDP listener: %w", err) + } + + // Ensure cleanup on error + success := false + + defer func() { + if !success { + _ = udpConn.Close() + } + }() + + // Create target address + targetAddr := &net.UDPAddr{ + IP: addr.IP, + Port: addr.Port, + } + + // Set deadline for dial operation only + if deadline, ok := ctx.Deadline(); ok { + if err := udpConn.SetDeadline(deadline); err != nil { + return nil, fmt.Errorf("set dial deadline: %w", err) + } + + defer func() { + if success { + _ = udpConn.SetDeadline(time.Time{}) + } + }() + } + + // Ensure QUIC config exists + if cfg == nil { + cfg = &uquic.Config{} + } + + // Establish QUIC connection with uquic + quicConn, err := uquic.DialEarly(ctx, udpConn, targetAddr, tlsConfig, cfg) + if err != nil { + return nil, fmt.Errorf("QUIC dial failed: %w", err) + } + + success = true + + // Cache connection for reuse + if ut.cachedConnections != nil { + key := quicconn.ConnKey(udpConn) + ut.cachedConnections.Set(key, &connection{ + packetConn: udpConn, + quicConn: quicConn, + }) + } + + return quicConn, nil +} + +// isSOCKS5 checks if the given proxy URL is a SOCKS5 proxy supporting UDP. +// Only SOCKS5 proxies are compatible with QUIC/HTTP3 due to UDP requirements. +func isSOCKS5(proxyURL string) bool { + if proxyURL == "" { + return false + } + + u, err := url.Parse(proxyURL) + if err != nil { + return false + } + + scheme := u.Scheme + + return scheme == "socks5" || scheme == "socks5h" +} diff --git a/backend/vendor/github.com/enetx/surf/impersonate.go b/backend/vendor/github.com/enetx/surf/impersonate.go new file mode 100644 index 0000000..d53c6cf --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/impersonate.go @@ -0,0 +1,283 @@ +package surf + +import ( + "github.com/enetx/g" + "github.com/enetx/http2" + "github.com/enetx/surf/header" + "github.com/enetx/surf/profiles/chrome" + "github.com/enetx/surf/profiles/firefox" +) + +type Impersonate struct { + builder *Builder + os ImpersonateOS +} + +// RandomOS selects a random OS (Windows, macOS, Linux, Android, or iOS) for the impersonate. +func (im *Impersonate) RandomOS() *Impersonate { + im.os = g.SliceOf(windows, macos, linux, android, ios).Random() + return im +} + +// Windows sets the OS to Windows. +func (im *Impersonate) Windows() *Impersonate { + im.os = windows + return im +} + +// MacOS sets the OS to macOS. +func (im *Impersonate) MacOS() *Impersonate { + im.os = macos + return im +} + +// Linux sets the OS to Linux. +func (im *Impersonate) Linux() *Impersonate { + im.os = linux + return im +} + +// Android sets the OS to Android. +func (im *Impersonate) Android() *Impersonate { + im.os = android + return im +} + +// IOS sets the OS to iOS. +func (im *Impersonate) IOS() *Impersonate { + im.os = ios + return im +} + +// Chrome impersonates Chrome browser v142. +func (im *Impersonate) Chrome() *Builder { + im.builder.browser = chromeBrowser + + // "ja3": "random", + // "ja3_hash": "random", + // "ja4": "t13d1516h2_8daaf6152771_d8a2da3f94cd", + // "ja4_r": "t13d1516h2_002f,0035,009c,009d,1301,1302,1303,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,001b,0023,002b,002d,0033,44cd,fe0d,ff01_0403,0804,0401,0503,0805,0501,0806,0601", + // "akamai": "1:65536;2:0;4:6291456;6:262144|15663105|0|m,a,s,p", + // "akamai_hash": "52d84b11737d980aef856699f885ca86", + // "peetprint": "GREASE-772-771|2-1.1|GREASE-4588-29-23-24|1027-2052-1025-1283-2053-1281-2054-1537|1|2|GREASE-4865-4866-4867-49195-49199-49196-49200-52393-52392-49171-49172-156-157-47-53|0-10-11-13-16-17613-18-23-27-35-43-45-5-51-65037-65281-GREASE-GREASE", + // "peetprint_hash": "1d4ffe9b0e34acac0bd883fa7f79d7b5" + + im.builder. + Boundary(chrome.Boundary). + JA().Chrome142(). + HTTP2Settings(). + HeaderTableSize(65536). + EnablePush(0). + InitialWindowSize(6291456). + MaxHeaderListSize(262144). + ConnectionFlow(15663105). + PriorityParam( + http2.PriorityParam{ + StreamDep: 0, + Exclusive: true, + Weight: 255, + }). + Set() + + headers := g.NewMapOrd[g.String, g.String]() + headers.Set(":authority", "") + headers.Set(":method", "") + headers.Set(":path", "") + headers.Set(":scheme", "") + headers.Set(header.ACCEPT_ENCODING, "gzip, deflate, br, zstd") + headers.Set(header.ACCEPT_LANGUAGE, "en-US,en;q=0.9") + headers.Set(header.AUTHORIZATION, "") + headers.Set(header.COOKIE, "") + headers.Set(header.ORIGIN, "") + headers.Set(header.REFERER, "") + headers.Set(header.SEC_CH_UA, chromeSecCHUA) + headers.Set(header.SEC_CH_UA_MOBILE, im.os.mobile()) + headers.Set(header.SEC_CH_UA_PLATFORM, chromePlatform[im.os]) + headers.Set(header.USER_AGENT, chromeUserAgent[im.os]) + + return im.builder.SetHeaders(headers) +} + +// FireFox impersonates Firefox browser v144. +func (im *Impersonate) FireFox() *Builder { + im.builder.browser = firefoxBrowser + + // "ja3": "771,4865-4867-4866-49195-49199-52393-52392-49196-49200-49162-49161-49171-49172-156-157-47-53,0-23-65281-10-11-35-16-5-34-18-51-43-13-45-28-27-65037,4588-29-23-24-25-256-257,0", + // "ja3_hash": "6f7889b9fb1a62a9577e685c1fcfa919", + // "ja4": "t13d1717h2_5b57614c22b0_3cbfd9057e0d", + // "ja4_r": "t13d1717h2_002f,0035,009c,009d,1301,1302,1303,c009,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,001b,001c,0022,0023,002b,002d,0033,fe0d,ff01_0403,0503,0603,0804,0805,0806,0401,0501,0601,0203,0201", + // "akamai": "1:65536;2:0;4:131072;5:16384|12517377|0|m,p,a,s", + // "akamai_hash": "6ea73faa8fc5aac76bded7bd238f6433", + // "peetprint": "772-771|2-1.1|4588-29-23-24-25-256-257|1027-1283-1539-2052-2053-2054-1025-1281-1537-515-513|1|1-2-3|4865-4867-4866-49195-49199-52393-52392-49196-49200-49162-49161-49171-49172-156-157-47-53|0-10-11-13-16-18-23-27-28-34-35-43-45-5-51-65037-65281", + // "peetprint_hash": "89d89662b21018947a9a46658c4f5ede" + + im.builder. + Boundary(firefox.Boundary). + JA().Firefox144(). + HTTP2Settings(). + HeaderTableSize(65536). + EnablePush(0). + InitialWindowSize(131072). + MaxFrameSize(16384). + ConnectionFlow(12517377). + PriorityParam( + http2.PriorityParam{ + StreamDep: 0, + Exclusive: false, + Weight: 41, + }). + Set() + + headers := g.NewMapOrd[g.String, g.String]() + headers.Set(":authority", "") + headers.Set(":method", "") + headers.Set(":path", "") + headers.Set(":scheme", "") + headers.Set(header.ACCEPT_ENCODING, "gzip, deflate, br, zstd") + headers.Set(header.ACCEPT_LANGUAGE, "en-US,en;q=0.5") + headers.Set(header.AUTHORIZATION, "") + headers.Set(header.COOKIE, "") + headers.Set(header.ORIGIN, "") + headers.Set(header.REFERER, "") + headers.Set(header.USER_AGENT, firefoxUserAgent[im.os]) + + return im.builder.SetHeaders(headers) +} + +// FireFoxPrivate impersonates Firefox private browser v144. +func (im *Impersonate) FireFoxPrivate() *Builder { + im.builder.browser = firefoxBrowser + + // "ja3": "771,4865-4867-4866-49195-49199-52393-52392-49196-49200-49162-49161-49171-49172-156-157-47-53,0-23-65281-10-11-16-5-34-18-51-43-13-28-27-65037,4588-29-23-24-25-256-257,0", + // "ja3_hash": "7704a11cf87dfcf33080b90ce11d5527", + // "ja4": "t13d1715h2_5b57614c22b0_a54fffd0eb61", + // "ja4_r": "t13d1715h2_002f,0035,009c,009d,1301,1302,1303,c009,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,001b,001c,0022,002b,0033,fe0d,ff01_0403,0503,0603,0804,0805,0806,0401,0501,0601,0203,0201", + // "akamai": "1:65536;2:0;4:131072;5:16384|12517377|0|m,p,a,s", + // "akamai_hash": "6ea73faa8fc5aac76bded7bd238f6433", + // "peetprint": "772-771|2-1.1|4588-29-23-24-25-256-257|1027-1283-1539-2052-2053-2054-1025-1281-1537-515-513|0|1-2-3|4865-4867-4866-49195-49199-52393-52392-49196-49200-49162-49161-49171-49172-156-157-47-53|0-10-11-13-16-18-23-27-28-34-43-5-51-65037-65281", + // "peetprint_hash": "d5b32f4cbc2381b4c0548aa52f5a6606" + + im.builder. + Boundary(firefox.Boundary). + JA().FirefoxPrivate144(). + HTTP2Settings(). + HeaderTableSize(65536). + EnablePush(0). + InitialWindowSize(131072). + MaxFrameSize(16384). + ConnectionFlow(12517377). + PriorityParam( + http2.PriorityParam{ + StreamDep: 0, + Exclusive: false, + Weight: 41, + }). + Set() + + headers := g.NewMapOrd[g.String, g.String]() + headers.Set(":authority", "") + headers.Set(":method", "") + headers.Set(":path", "") + headers.Set(":scheme", "") + headers.Set(header.ACCEPT_ENCODING, "gzip, deflate, br, zstd") + headers.Set(header.ACCEPT_LANGUAGE, "en-US,en;q=0.5") + headers.Set(header.AUTHORIZATION, "") + headers.Set(header.COOKIE, "") + headers.Set(header.ORIGIN, "") + headers.Set(header.REFERER, "") + headers.Set(header.USER_AGENT, firefoxUserAgent[im.os]) + + return im.builder.SetHeaders(headers) +} + +// Tor impersonates Tor browser v14.5.6. +func (im *Impersonate) Tor() *Builder { + im.builder.browser = firefoxBrowser + + // "ja3": "771,4865-4867-4866-49195-49199-52393-52392-49196-49200-49171-49172-156-157-47-53,0-23-65281-10-11-35-16-5-34-51-43-13-45-28-65037,29-23-24-25-256-257,0", + // "ja3_hash": "9a7f6a45c84d90c9e8baecb0c9ae8dff", + // "ja4": "t13d1515h2_8daaf6152771_2764158f9823", + // "ja4_r": "t13d1515h2_002f,0035,009c,009d,1301,1302,1303,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0000,0005,000a,000b,000d,0017,001c,0022,0023,002b,002d,0033,fe0d,ff01_0403,0503,0603,0804,0805,0806,0401,0501,0601,0203,0201", + // "akamai": "1:65536;2:0;4:131072;5:16384|12517377|0|m,p,a,s", + // "akamai_hash": "6ea73faa8fc5aac76bded7bd238f6433", + // "peetprint": "772-771|2-1.1|29-23-24-25-256-257|1027-1283-1539-2052-2053-2054-1025-1281-1537-515-513|1||4865-4867-4866-49195-49199-52393-52392-49196-49200-49171-49172-156-157-47-53|0-10-11-13-16-23-28-34-35-43-45-5-51-65037-65281", + // "peetprint_hash": "2eb215311454f1bcef8d33d5281a880d" + + im.builder. + Boundary(firefox.Boundary). + JA().Tor(). + HTTP2Settings(). + HeaderTableSize(65536). + InitialWindowSize(131072). + MaxFrameSize(16384). + EnablePush(0). + ConnectionFlow(12517377). + PriorityParam( + http2.PriorityParam{ + StreamDep: 0, + Exclusive: false, + Weight: 41, + }). + Set() + + headers := g.NewMapOrd[g.String, g.String]() + headers.Set(":authority", "") + headers.Set(":method", "") + headers.Set(":path", "") + headers.Set(":scheme", "") + headers.Set(header.ACCEPT_ENCODING, "gzip, deflate, br, zstd") + headers.Set(header.ACCEPT_LANGUAGE, "en-US,en;q=0.5") + headers.Set(header.AUTHORIZATION, "") + headers.Set(header.COOKIE, "") + headers.Set(header.ORIGIN, "") + headers.Set(header.REFERER, "") + headers.Set(header.USER_AGENT, torUserAgent[im.os]) + + return im.builder.SetHeaders(headers) +} + +// TorPrivate impersonates Tor private browser v14.5.6. +func (im *Impersonate) TorPrivate() *Builder { + im.builder.browser = firefoxBrowser + + // "ja3": "771,4865-4867-4866-49195-49199-52393-52392-49196-49200-49171-49172-156-157-47-53,0-23-65281-10-11-16-5-34-51-43-13-28-65037,29-23-24-25-256-257,0", + // "ja3_hash": "0faf2a91198d40dbd58b9308f3fca2fd", + // "ja4": "t13d1513h2_8daaf6152771_b10d063d83a8", + // "ja4_r": "t13d1513h2_002f,0035,009c,009d,1301,1302,1303,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0000,0005,000a,000b,000d,0017,001c,0022,002b,0033,fe0d,ff01_0403,0503,0603,0804,0805,0806,0401,0501,0601,0203,0201", + // "akamai": "1:65536;2:0;4:131072;5:16384|12517377|0|m,p,a,s", + // "akamai_hash": "6ea73faa8fc5aac76bded7bd238f6433", + // "peetprint": "772-771|2-1.1|29-23-24-25-256-257|1027-1283-1539-2052-2053-2054-1025-1281-1537-515-513|0||4865-4867-4866-49195-49199-52393-52392-49196-49200-49171-49172-156-157-47-53|0-10-11-13-16-23-28-34-43-5-51-65037-65281", + // "peetprint_hash": "3838f472ba00b12aab5a866552abf7a4" + + im.builder. + Boundary(firefox.Boundary). + JA().TorPrivate(). + HTTP2Settings(). + HeaderTableSize(65536). + InitialWindowSize(131072). + MaxFrameSize(16384). + EnablePush(0). + ConnectionFlow(12517377). + PriorityParam( + http2.PriorityParam{ + StreamDep: 0, + Exclusive: false, + Weight: 41, + }). + Set() + + headers := g.NewMapOrd[g.String, g.String]() + headers.Set(":authority", "") + headers.Set(":method", "") + headers.Set(":path", "") + headers.Set(":scheme", "") + headers.Set(header.ACCEPT_ENCODING, "gzip, deflate, br, zstd") + headers.Set(header.ACCEPT_LANGUAGE, "en-US,en;q=0.5") + headers.Set(header.AUTHORIZATION, "") + headers.Set(header.COOKIE, "") + headers.Set(header.ORIGIN, "") + headers.Set(header.REFERER, "") + headers.Set(header.USER_AGENT, torUserAgent[im.os]) + + return im.builder.SetHeaders(headers) +} diff --git a/backend/vendor/github.com/enetx/surf/impersonate_os.go b/backend/vendor/github.com/enetx/surf/impersonate_os.go new file mode 100644 index 0000000..648ad15 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/impersonate_os.go @@ -0,0 +1,56 @@ +package surf + +import "github.com/enetx/g" + +// ImpersonateOS defines the operating system to impersonate in User-Agent strings. +type ImpersonateOS int + +const ( + windows ImpersonateOS = iota // Default, Microsoft Windows. + macos // macOS by Apple. + linux // Generic Linux. + android // Android by Google. + ios // iOS by Apple. +) + +const chromeSecCHUA = `"Chromium";v="142", "Google Chrome";v="142", "Not_A Brand";v="99"` + +var chromePlatform = map[ImpersonateOS]g.String{ + windows: `"Windows"`, + macos: `"macOS"`, + linux: `"Linux"`, + android: `"Android"`, + ios: `"iOS"`, +} + +var chromeUserAgent = map[ImpersonateOS]g.String{ + windows: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36", + macos: "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36", + linux: "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36", + android: "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Mobile Safari/537.36", + ios: "Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/142.0.7444.77 Mobile/15E148 Safari/604.1", +} + +var firefoxUserAgent = map[ImpersonateOS]g.String{ + windows: "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:144.0) Gecko/20100101 Firefox/144.0", + macos: "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:144.0) Gecko/20100101 Firefox/144.0", + linux: "Mozilla/5.0 (X11; Linux x86_64; rv:144.0) Gecko/20100101 Firefox/144.0", + android: "Mozilla/5.0 (Android 16; Mobile; rv:144.0) Gecko/144.0 Firefox/144.0", + ios: "Mozilla/5.0 (iPhone; CPU iPhone OS 18_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/144.0 Mobile/15E148 Safari/605.1.15", +} + +var torUserAgent = map[ImpersonateOS]g.String{ + windows: "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0", + macos: "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0", + linux: "Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0", + android: "Mozilla/5.0 (Android 10; Mobile; rv:128.0) Gecko/134.0 Firefox/128.0", + ios: "Mozilla/5.0 (iPhone; CPU iPhone OS 18_6_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/128.3 Mobile/15E148 Safari/605.1.15", +} + +func (imo ImpersonateOS) mobile() g.String { + if imo == android || imo == ios { + return "?1" + } + + return "?0" +} diff --git a/backend/vendor/github.com/enetx/surf/internal/drainbody/drainbody.go b/backend/vendor/github.com/enetx/surf/internal/drainbody/drainbody.go new file mode 100644 index 0000000..b528870 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/internal/drainbody/drainbody.go @@ -0,0 +1,30 @@ +package drainbody + +import ( + "bytes" + "io" + + "github.com/enetx/http" +) + +// drainBody reads all of b to memory and then returns two equivalent +// ReadClosers yielding the same bytes. +// It returns an error if the initial slurp of all bytes fails. It does not attempt +// to make the returned ReadClosers have identical error-matching behavior. +func DrainBody(b io.ReadCloser) (io.ReadCloser, io.ReadCloser, error) { + if b == nil || b == http.NoBody { + return nil, nil, nil + } + + var buf bytes.Buffer + + if _, err := buf.ReadFrom(b); err != nil { + return nil, nil, err + } + + if err := b.Close(); err != nil { + return nil, nil, err + } + + return io.NopCloser(&buf), io.NopCloser(bytes.NewReader(buf.Bytes())), nil +} diff --git a/backend/vendor/github.com/enetx/surf/internal/specclone/specclone.go b/backend/vendor/github.com/enetx/surf/internal/specclone/specclone.go new file mode 100644 index 0000000..29187d6 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/internal/specclone/specclone.go @@ -0,0 +1,554 @@ +// Package specclone provides deep cloning functionality for uTLS ClientHelloSpec structures. +// +// This package is essential for creating independent copies of TLS client specifications +// without sharing memory references, preventing unintended mutations between cloned instances. +// +// The package handles complete cloning of utls.ClientHelloSpec structures, including: +// - Basic fields (TLS versions, cipher suites, compression methods) +// - Complex nested extension structures (20+ supported extension types) +// - Dynamic extension types through reflection-based cloning +// - Safe handling of nil pointers and empty collections +// +// Example usage: +// +// spec, err := utls.UTLSIdToSpec(utls.HelloFirefox_120) +// if err != nil { +// panic(err) +// } +// +// // Clone the spec +// cloned := specclone.SpecClone(&spec) +// +// // Modifications to original don't affect clone +// spec.TLSVersMin = 0x0301 // Change original +// // cloned.TLSVersMin remains unchanged +// +// The cloning process ensures: +// - No shared memory references between original and clone +// - Safe handling of nil pointers at all levels +// - Proper deep copying of nested data structures +// - Thread-safe operations (no shared mutable state) +// +// Performance considerations: +// - Uses reflection for unknown extension types (performance overhead) +// - Creates complete copies of all data structures +// - Memory usage scales with complexity of input specification +package specclone + +import ( + "reflect" + "unsafe" + + utls "github.com/enetx/utls" +) + +// Clone creates a deep copy of a utls.ClientHelloSpec. +// +// This function performs complete deep cloning of all fields and nested structures, +// ensuring the returned clone is completely independent from the original. +// +// Parameters: +// - c: Pointer to the source ClientHelloSpec to clone +// +// Returns: +// - Pointer to a new ClientHelloSpec with all fields deeply copied +// - Returns nil if input is nil +// +// The function handles: +// - Basic fields: TLSVersMin, TLSVersMax, GetSessionID +// - Slices: CipherSuites, CompressionMethods (with independent memory) +// - Extensions: All supported extension types with proper deep copying +// +// Supported extension types include: +// - SNIExtension, ALPNExtension, StatusRequestExtension +// - SupportedCurvesExtension, SignatureAlgorithmsExtension +// - KeyShareExtension, SessionTicketExtension, PreSharedKeyExtension +// - And 15+ more extension types +// +// For unknown extension types, the function falls back to reflection-based +// deep cloning to ensure completeness. +func Clone(c *utls.ClientHelloSpec) *utls.ClientHelloSpec { + if c == nil { + return nil + } + + clone := &utls.ClientHelloSpec{ + TLSVersMin: c.TLSVersMin, + TLSVersMax: c.TLSVersMax, + GetSessionID: c.GetSessionID, + } + + if c.CipherSuites != nil { + clone.CipherSuites = append([]uint16{}, c.CipherSuites...) + } + + if c.CompressionMethods != nil { + clone.CompressionMethods = append([]uint8{}, c.CompressionMethods...) + } + + if c.Extensions != nil { + clone.Extensions = make([]utls.TLSExtension, len(c.Extensions)) + for i, ext := range c.Extensions { + if ext != nil { + clone.Extensions[i] = deepCloneExtension(ext) + } + } + } + + return clone +} + +// deepCloneExtension performs type-specific deep cloning of TLS extensions. +// +// This function handles the cloning of individual TLS extensions based on their +// concrete type. It supports over 20 different extension types with proper +// deep copying of their internal state and nested structures. +// +// For each supported extension type, the function: +// - Creates a new instance of the same type +// - Deep copies all fields including slices and nested structs +// - Ensures complete memory independence from the original +// +// Supported extension types: +// - SNIExtension: Server Name Indication +// - ALPNExtension: Application Layer Protocol Negotiation +// - SupportedCurvesExtension: Elliptic Curves +// - SignatureAlgorithmsExtension: Signature Algorithms +// - KeyShareExtension: Key Exchange with deep copying of key data +// - SessionTicketExtension: Session tickets with SessionState cloning +// - PreSharedKeyExtension: Both Fake and Utls variants +// - And many more specialized extensions +// +// For extensions not explicitly handled, the function falls back to +// reflection-based deep cloning via deepCloneInterface. +// +// Parameters: +// - ext: The TLS extension to clone +// +// Returns: +// - A deeply cloned copy of the extension with the same concrete type +func deepCloneExtension(ext utls.TLSExtension) utls.TLSExtension { + switch e := ext.(type) { + case *utls.SNIExtension: + return &utls.SNIExtension{ + ServerName: e.ServerName, + } + case *utls.StatusRequestExtension: + return &utls.StatusRequestExtension{} + case *utls.SupportedCurvesExtension: + return &utls.SupportedCurvesExtension{ + Curves: append([]utls.CurveID{}, e.Curves...), + } + case *utls.SupportedPointsExtension: + return &utls.SupportedPointsExtension{ + SupportedPoints: append([]uint8{}, e.SupportedPoints...), + } + case *utls.SignatureAlgorithmsExtension: + return &utls.SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: append([]utls.SignatureScheme{}, e.SupportedSignatureAlgorithms...), + } + case *utls.ALPNExtension: + return &utls.ALPNExtension{ + AlpnProtocols: append([]string{}, e.AlpnProtocols...), + } + case *utls.StatusRequestV2Extension: + return &utls.StatusRequestV2Extension{} + case *utls.SCTExtension: + return &utls.SCTExtension{} + case *utls.UtlsPaddingExtension: + return &utls.UtlsPaddingExtension{ + PaddingLen: e.PaddingLen, + WillPad: e.WillPad, + GetPaddingLen: e.GetPaddingLen, + } + case *utls.ExtendedMasterSecretExtension: + return &utls.ExtendedMasterSecretExtension{} + case *utls.FakeTokenBindingExtension: + return &utls.FakeTokenBindingExtension{ + MajorVersion: e.MajorVersion, + MinorVersion: e.MinorVersion, + KeyParameters: append([]uint8{}, e.KeyParameters...), + } + case *utls.UtlsCompressCertExtension: + return &utls.UtlsCompressCertExtension{ + Algorithms: append([]utls.CertCompressionAlgo{}, e.Algorithms...), + } + case *utls.FakeRecordSizeLimitExtension: + return &utls.FakeRecordSizeLimitExtension{ + Limit: e.Limit, + } + case *utls.FakeDelegatedCredentialsExtension: + return &utls.FakeDelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: append([]utls.SignatureScheme{}, e.SupportedSignatureAlgorithms...), + } + case *utls.SessionTicketExtension: + var session *utls.SessionState + if e.Session != nil { + extra := make([][]byte, len(e.Session.Extra)) + for i, b := range e.Session.Extra { + if b != nil { + extra[i] = append([]byte{}, b...) + } + } + + session = &utls.SessionState{ + Extra: extra, + EarlyData: e.Session.EarlyData, + } + } + + return &utls.SessionTicketExtension{ + Session: session, + Ticket: append([]byte{}, e.Ticket...), + Initialized: e.Initialized, + } + case *utls.FakePreSharedKeyExtension: + clonedIdentities := make([]utls.PskIdentity, len(e.Identities)) + for i, id := range e.Identities { + clonedIdentities[i] = utls.PskIdentity{ + Label: append([]byte{}, id.Label...), + ObfuscatedTicketAge: id.ObfuscatedTicketAge, + } + } + + clonedBinders := make([][]byte, len(e.Binders)) + for i, b := range e.Binders { + if b != nil { + clonedBinders[i] = append([]byte{}, b...) + } + } + + return &utls.FakePreSharedKeyExtension{ + Identities: clonedIdentities, + Binders: clonedBinders, + } + case *utls.UtlsPreSharedKeyExtension: + clonedIdentities := make([]utls.PskIdentity, len(e.Identities)) + for i, id := range e.Identities { + clonedIdentities[i] = utls.PskIdentity{ + Label: append([]byte{}, id.Label...), + ObfuscatedTicketAge: id.ObfuscatedTicketAge, + } + } + + clonedBinders := make([][]byte, len(e.Binders)) + for i, b := range e.Binders { + if b != nil { + clonedBinders[i] = append([]byte{}, b...) + } + } + + var clonedSession *utls.SessionState + if e.Session != nil { + extra := make([][]byte, len(e.Session.Extra)) + for i, b := range e.Session.Extra { + if b != nil { + extra[i] = append([]byte{}, b...) + } + } + clonedSession = &utls.SessionState{ + Extra: extra, + EarlyData: e.Session.EarlyData, + } + } + + return &utls.UtlsPreSharedKeyExtension{ + PreSharedKeyCommon: utls.PreSharedKeyCommon{ + Identities: clonedIdentities, + Binders: clonedBinders, + BinderKey: append([]byte{}, e.BinderKey...), + EarlySecret: append([]byte{}, e.EarlySecret...), + Session: clonedSession, + }, + OmitEmptyPsk: e.OmitEmptyPsk, + } + case *utls.SupportedVersionsExtension: + return &utls.SupportedVersionsExtension{ + Versions: append([]uint16{}, e.Versions...), + } + case *utls.CookieExtension: + return &utls.CookieExtension{ + Cookie: append([]byte{}, e.Cookie...), + } + case *utls.PSKKeyExchangeModesExtension: + return &utls.PSKKeyExchangeModesExtension{ + Modes: append([]uint8{}, e.Modes...), + } + case *utls.SignatureAlgorithmsCertExtension: + return &utls.SignatureAlgorithmsCertExtension{ + SupportedSignatureAlgorithms: append([]utls.SignatureScheme{}, e.SupportedSignatureAlgorithms...), + } + case *utls.KeyShareExtensionExtended: + var keyShares []utls.KeyShare + if e.KeyShareExtension != nil { + keyShares = make([]utls.KeyShare, len(e.KeyShares)) + for i, ks := range e.KeyShares { + keyShares[i] = utls.KeyShare{ + Group: ks.Group, + Data: append([]byte{}, ks.Data...), + } + } + } + return &utls.KeyShareExtensionExtended{ + KeyShareExtension: &utls.KeyShareExtension{ + KeyShares: keyShares, + }, + HybridReuseKey: e.HybridReuseKey, + } + case *utls.KeyShareExtension: + keyShares := make([]utls.KeyShare, len(e.KeyShares)) + for i, ks := range e.KeyShares { + keyShares[i] = utls.KeyShare{ + Group: ks.Group, + Data: append([]byte{}, ks.Data...), + } + } + return &utls.KeyShareExtension{KeyShares: keyShares} + case *utls.QUICTransportParametersExtension: + return &utls.QUICTransportParametersExtension{ + TransportParameters: e.TransportParameters, + } + case *utls.NPNExtension: + return &utls.NPNExtension{ + NextProtos: append([]string{}, e.NextProtos...), + } + case *utls.ApplicationSettingsExtension: + return &utls.ApplicationSettingsExtension{ + SupportedProtocols: append([]string{}, e.SupportedProtocols...), + } + case *utls.ApplicationSettingsExtensionNew: + return &utls.ApplicationSettingsExtensionNew{ + SupportedProtocols: append([]string{}, e.SupportedProtocols...), + } + case *utls.FakeChannelIDExtension: + return &utls.FakeChannelIDExtension{ + OldExtensionID: e.OldExtensionID, + } + case *utls.GREASEEncryptedClientHelloExtension: + return &utls.GREASEEncryptedClientHelloExtension{ + CandidateCipherSuites: append([]utls.HPKESymmetricCipherSuite{}, e.CandidateCipherSuites...), + CandidatePayloadLens: append([]uint16{}, e.CandidatePayloadLens...), + } + case *utls.RenegotiationInfoExtension: + return &utls.RenegotiationInfoExtension{ + Renegotiation: e.Renegotiation, + RenegotiatedConnection: append([]byte{}, e.RenegotiatedConnection...), + } + case *utls.UtlsGREASEExtension: + return &utls.UtlsGREASEExtension{ + Value: e.Value, + Body: append([]byte{}, e.Body...), + } + case *utls.GenericExtension: + return &utls.GenericExtension{ + Id: e.Id, + Data: append([]byte{}, e.Data...), + } + case utls.PreSharedKeyExtension: + switch psk := e.(type) { + case *utls.FakePreSharedKeyExtension: + return deepCloneExtension(psk) + case *utls.UtlsPreSharedKeyExtension: + return deepCloneExtension(psk) + default: + return deepCloneInterface(e).(utls.TLSExtension) + } + default: + return deepCloneInterface(ext).(utls.TLSExtension) + } +} + +// deepCopyStruct performs deep copying of struct values using reflection. +// +// This function handles the copying of struct fields, including unexported fields +// that cannot be accessed through normal reflection. It uses unsafe operations +// to access unexported fields when necessary. +// +// The function iterates through all fields of the source struct and recursively +// copies each field to the corresponding field in the destination struct. +// +// Parameters: +// - src: The source struct value to copy from +// - dst: The destination struct value to copy to +func deepCopyStruct(src, dst reflect.Value) { + if !src.IsValid() { + return + } + + switch src.Kind() { + case reflect.Struct: + for i := 0; i < src.NumField(); i++ { + srcField := src.Field(i) + dstField := dst.Field(i) + + if !dstField.CanSet() { + if srcField.CanInterface() || srcField.CanAddr() { + dstFieldPtr := reflect.NewAt(srcField.Type(), + unsafe.Pointer(dst.UnsafeAddr()+dst.Type().Field(i).Offset)) + deepCopyValue(srcField, dstFieldPtr.Elem()) + } + } else { + deepCopyValue(srcField, dstField) + } + } + default: + deepCopyValue(src, dst) + } +} + +// deepCopyValue performs deep copying of values of various types using reflection. +// +// This is the core reflection-based copying function that handles different +// value kinds including structs, slices, arrays, maps, pointers, and interfaces. +// It recursively processes nested structures to ensure complete deep copying. +// +// Supported value kinds: +// - Struct: Delegates to deepCopyStruct for field-by-field copying +// - Slice: Creates new slice with recursively copied elements +// - Array: Copies each element in-place +// - Map: Creates new map with recursively copied keys and values +// - Pointer: Creates new pointer with recursively copied pointed-to value +// - Interface: Handles interface values through deepCloneInterface +// - Chan, Func: Copies reference (cannot deep copy these types) +// - Basic types: Direct value copying +// +// Parameters: +// - src: The source value to copy from +// - dst: The destination value to copy to +func deepCopyValue(src, dst reflect.Value) { + if !src.IsValid() { + return + } + + switch src.Kind() { + case reflect.Struct: + deepCopyStruct(src, dst) + case reflect.Slice: + if src.IsNil() { + if dst.CanSet() { + dst.Set(reflect.Zero(src.Type())) + } + return + } + + newSlice := reflect.MakeSlice(src.Type(), src.Len(), src.Cap()) + + for i := 0; i < src.Len(); i++ { + deepCopyValue(src.Index(i), newSlice.Index(i)) + } + + if dst.CanSet() { + dst.Set(newSlice) + } + case reflect.Array: + for i := 0; i < src.Len(); i++ { + deepCopyValue(src.Index(i), dst.Index(i)) + } + case reflect.Map: + if src.IsNil() { + if dst.CanSet() { + dst.Set(reflect.Zero(src.Type())) + } + return + } + + newMap := reflect.MakeMap(src.Type()) + + for _, key := range src.MapKeys() { + newKey := reflect.New(key.Type()).Elem() + newVal := reflect.New(src.MapIndex(key).Type()).Elem() + + deepCopyValue(key, newKey) + deepCopyValue(src.MapIndex(key), newVal) + + newMap.SetMapIndex(newKey, newVal) + } + + if dst.CanSet() { + dst.Set(newMap) + } + case reflect.Pointer: + if src.IsNil() { + if dst.CanSet() { + dst.Set(reflect.Zero(src.Type())) + } + return + } + + newPtr := reflect.New(src.Type().Elem()) + + deepCopyValue(src.Elem(), newPtr.Elem()) + + if dst.CanSet() { + dst.Set(newPtr) + } + case reflect.Interface: + if src.IsNil() { + if dst.CanSet() { + dst.Set(reflect.Zero(src.Type())) + } + return + } + + newVal := deepCloneInterface(src.Interface()) + + if dst.CanSet() { + dst.Set(reflect.ValueOf(newVal)) + } + case reflect.Chan, reflect.Func: + if dst.CanSet() { + dst.Set(src) + } + default: + if dst.CanSet() { + dst.Set(src) + } + } +} + +// deepCloneInterface creates a deep copy of any interface{} value using reflection. +// +// This function serves as the entry point for reflection-based deep cloning. +// It handles both pointer and non-pointer types, ensuring that the returned +// value is completely independent from the source. +// +// The function process: +// 1. Checks for nil input (returns nil) +// 2. Handles pointer types by creating new pointer and copying pointed-to value +// 3. Handles non-pointer types by creating new value and copying content +// 4. Uses deepCopyValue for the actual recursive copying logic +// +// This function is used as a fallback when specific type handling is not +// available in deepCloneExtension, ensuring that all extension types can +// be cloned even if they are not explicitly supported. +// +// Parameters: +// - src: The source value to clone (any type) +// +// Returns: +// - A deeply cloned copy of the source value +// - Returns nil if source is nil +func deepCloneInterface(src any) any { + if src == nil { + return nil + } + + srcVal := reflect.ValueOf(src) + srcType := srcVal.Type() + + if srcType.Kind() == reflect.Pointer { + if srcVal.IsNil() { + return nil + } + + dstPtr := reflect.New(srcType.Elem()) + deepCopyValue(srcVal.Elem(), dstPtr.Elem()) + + return dstPtr.Interface() + } + + dst := reflect.New(srcType).Elem() + deepCopyValue(srcVal, dst) + + return dst.Interface() +} diff --git a/backend/vendor/github.com/enetx/surf/ja.go b/backend/vendor/github.com/enetx/surf/ja.go new file mode 100644 index 0000000..dd724ae --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/ja.go @@ -0,0 +1,287 @@ +package surf + +import ( + "context" + "fmt" + "math" + "math/rand" + "net" + + "github.com/enetx/g" + "github.com/enetx/http" + "github.com/enetx/surf/internal/specclone" + "github.com/enetx/surf/pkg/connectproxy" + "github.com/enetx/surf/profiles/chrome" + "github.com/enetx/surf/profiles/firefox" + + utls "github.com/enetx/utls" +) + +// JA provides JA3/4 TLS fingerprinting capabilities for HTTP clients. +// JA is a method for creating SSL/TLS client fingerprints to identify and classify malware +// or other applications. This struct allows configuring various TLS ClientHello specifications +// to mimic different browsers and applications for advanced HTTP client behavior. +// +// Reference: https://lwthiker.com/networks/2022/06/17/tls-fingerprinting.html +type JA struct { + spec utls.ClientHelloSpec // Custom TLS ClientHello specification + id utls.ClientHelloID // Predefined TLS ClientHello identifier + builder *Builder // Reference to the parent builder for method chaining +} + +// SetHelloID sets a ClientHelloID for the TLS connection. +// +// The provided ClientHelloID is used to customize the TLS handshake. This +// should be a valid identifier that can be mapped to a specific ClientHelloSpec. +// +// It returns a pointer to the Options struct for method chaining. This allows +// additional configuration methods to be called on the result. +// +// Example usage: +// +// JA().SetHelloID(utls.HelloChrome_Auto) +func (j *JA) SetHelloID(id utls.ClientHelloID) *Builder { + j.id = id + return j.build() +} + +// SetHelloSpec sets a custom ClientHelloSpec for the TLS connection. +// +// This method allows you to set a custom ClientHelloSpec to be used during the TLS handshake. +// The provided spec should be a valid ClientHelloSpec. +// +// It returns a pointer to the Options struct for method chaining. This allows +// additional configuration methods to be called on the result. +// +// Example usage: +// +// JA().SetHelloSpec(spec) +func (j *JA) SetHelloSpec(spec utls.ClientHelloSpec) *Builder { + j.spec = spec + return j.build() +} + +// build applies JA3/4 TLS fingerprinting configuration to the HTTP client. +// This method configures the client with custom TLS settings and proxy support for JA3/4 fingerprinting. +// +// The method performs several key operations: +// 1. Skips configuration if HTTP/3 is being used (JA3/4 only works with HTTP/1.1 and HTTP/2) +// 2. Adds connection cleanup middleware if not using singleton pattern +// 3. Configures proxy settings for both static and dynamic proxy configurations +// 4. Wraps the transport with a custom round tripper that implements JA3/4 fingerprinting +// +// Returns the builder instance for method chaining. +func (j *JA) build() *Builder { + return j.builder.addCliMW(func(c *Client) error { + // JA3 fingerprinting is not compatible with HTTP/3 - skip if HTTP/3 is used + if _, ok := c.GetTransport().(*uquicTransport); ok { + return nil + } + + if !j.builder.singleton { + j.builder.addRespMW(closeIdleConnectionsMW, 0) + } + + if j.builder.proxy != nil { + var proxy string + + // Handle static proxy configurations + switch v := j.builder.proxy.(type) { + case string: + proxy = v + case g.String: + proxy = v.Std() + } + + if proxy != "" { + // Static proxy configuration + dialer, err := connectproxy.NewDialer(proxy) + if err != nil { + c.GetTransport().(*http.Transport).DialContext = func(context.Context, string, string) (net.Conn, error) { + return nil, fmt.Errorf("proxy dialer init failed: %w", err) + } + } else { + c.GetTransport().(*http.Transport).DialContext = dialer.DialContext + } + } else { + // Dynamic proxy configuration - evaluate proxy per connection + c.GetTransport().(*http.Transport).DialContext = func(ctx context.Context, network, addr string) (net.Conn, error) { + var proxy string + + switch v := j.builder.proxy.(type) { + case func() g.String: + proxy = v().Std() + case []string: + if len(v) > 0 { + proxy = v[rand.Intn(len(v))] + } + case g.Slice[string]: + proxy = v.Random() + case g.Slice[g.String]: + proxy = v.Random().Std() + } + + if proxy == "" { + return c.GetDialer().DialContext(ctx, network, addr) + } + + dialer, err := connectproxy.NewDialer(proxy) + if err != nil { + return nil, fmt.Errorf("create proxy dialer for %s: %w", proxy, err) + } + + return dialer.DialContext(ctx, network, addr) + } + } + } + + // Wrap the transport with JA3/4 fingerprinting round tripper + c.GetClient().Transport = newRoundTripper(j, c.GetTransport()) + + return nil + }, math.MaxInt) +} + +// getSpec determines the ClientHelloSpec to be used for the TLS connection. +// +// The ClientHelloSpec is selected based on the following order of precedence: +// 1. If a custom ClientHelloID is set (via SetHelloID), it attempts to convert this ID to a ClientHelloSpec. +// 2. If none of the above conditions are met, it returns the currently set ClientHelloSpec. +// +// This method returns the selected ClientHelloSpec along with an error value. If an error occurs +// during conversion, it returns the error. +func (j *JA) getSpec() g.Result[utls.ClientHelloSpec] { + if !j.id.IsSet() { + return g.ResultOf(utls.UTLSIdToSpec(j.id)) + } + + spec := specclone.Clone(&j.spec) + return g.Ok(*spec) +} + +// Browser and application fingerprinting methods. +// These methods provide convenient shortcuts to mimic various popular browsers and applications +// by setting predefined ClientHelloID values that match their TLS fingerprints. + +// Android sets the JA3/4 fingerprint to mimic Android 11 OkHttp client. +func (j *JA) Android() *Builder { return j.SetHelloID(utls.HelloAndroid_11_OkHttp) } + +// Chrome sets the JA3/4 fingerprint to mimic the latest Chrome browser (auto-detection). +func (j *JA) Chrome() *Builder { return j.SetHelloID(utls.HelloChrome_Auto) } + +// Chrome58 sets the JA3/4 fingerprint to mimic Chrome version 58. +func (j *JA) Chrome58() *Builder { return j.SetHelloID(utls.HelloChrome_58) } + +// Chrome62 sets the JA3/4 fingerprint to mimic Chrome version 62. +func (j *JA) Chrome62() *Builder { return j.SetHelloID(utls.HelloChrome_62) } + +// Chrome70 sets the JA3/4 fingerprint to mimic Chrome version 70. +func (j *JA) Chrome70() *Builder { return j.SetHelloID(utls.HelloChrome_70) } + +// Chrome72 sets the JA3/4 fingerprint to mimic Chrome version 72. +func (j *JA) Chrome72() *Builder { return j.SetHelloID(utls.HelloChrome_72) } + +// Chrome83 sets the JA3/4 fingerprint to mimic Chrome version 83. +func (j *JA) Chrome83() *Builder { return j.SetHelloID(utls.HelloChrome_83) } + +// Chrome87 sets the JA3/4 fingerprint to mimic Chrome version 87. +func (j *JA) Chrome87() *Builder { return j.SetHelloID(utls.HelloChrome_87) } + +// Chrome96 sets the JA3/4 fingerprint to mimic Chrome version 96. +func (j *JA) Chrome96() *Builder { return j.SetHelloID(utls.HelloChrome_96) } + +// Chrome100 sets the JA3/4 fingerprint to mimic Chrome version 100. +func (j *JA) Chrome100() *Builder { return j.SetHelloID(utls.HelloChrome_100) } + +// Chrome102 sets the JA3/4 fingerprint to mimic Chrome version 102. +func (j *JA) Chrome102() *Builder { return j.SetHelloID(utls.HelloChrome_102) } + +// Chrome106 sets the JA3/4 fingerprint to mimic Chrome version 106 with shuffled extensions. +func (j *JA) Chrome106() *Builder { return j.SetHelloID(utls.HelloChrome_106_Shuffle) } + +// Chrome120 sets the JA3/4 fingerprint to mimic Chrome version 120. +func (j *JA) Chrome120() *Builder { return j.SetHelloID(utls.HelloChrome_120) } + +// Chrome120PQ sets the JA3/4 fingerprint to mimic Chrome version 120 with post-quantum cryptography support. +func (j *JA) Chrome120PQ() *Builder { return j.SetHelloID(utls.HelloChrome_120_PQ) } + +// Chrome142 sets the JA3/4 fingerprint to mimic Chrome version 142. +func (j *JA) Chrome142() *Builder { return j.SetHelloSpec(chrome.HelloChrome_142) } + +// Edge sets the JA3/4 fingerprint to mimic Microsoft Edge version 85. +func (j *JA) Edge() *Builder { return j.SetHelloID(utls.HelloEdge_85) } + +// Edge85 sets the JA3/4 fingerprint to mimic Microsoft Edge version 85. +func (j *JA) Edge85() *Builder { return j.SetHelloID(utls.HelloEdge_85) } + +// Edge106 sets the JA3/4 fingerprint to mimic Microsoft Edge version 106. +func (j *JA) Edge106() *Builder { return j.SetHelloID(utls.HelloEdge_106) } + +// Firefox sets the JA3/4 fingerprint to mimic the latest Firefox browser (auto-detection). +func (j *JA) Firefox() *Builder { return j.SetHelloID(utls.HelloFirefox_Auto) } + +// Firefox55 sets the JA3/4 fingerprint to mimic Firefox version 55. +func (j *JA) Firefox55() *Builder { return j.SetHelloID(utls.HelloFirefox_55) } + +// Firefox56 sets the JA3/4 fingerprint to mimic Firefox version 56. +func (j *JA) Firefox56() *Builder { return j.SetHelloID(utls.HelloFirefox_56) } + +// Firefox63 sets the JA3/4 fingerprint to mimic Firefox version 63. +func (j *JA) Firefox63() *Builder { return j.SetHelloID(utls.HelloFirefox_63) } + +// Firefox65 sets the JA3/4 fingerprint to mimic Firefox version 65. +func (j *JA) Firefox65() *Builder { return j.SetHelloID(utls.HelloFirefox_65) } + +// Firefox99 sets the JA3/4 fingerprint to mimic Firefox version 99. +func (j *JA) Firefox99() *Builder { return j.SetHelloID(utls.HelloFirefox_99) } + +// Firefox102 sets the JA3/4 fingerprint to mimic Firefox version 102. +func (j *JA) Firefox102() *Builder { return j.SetHelloID(utls.HelloFirefox_102) } + +// Firefox105 sets the JA3/4 fingerprint to mimic Firefox version 105. +func (j *JA) Firefox105() *Builder { return j.SetHelloID(utls.HelloFirefox_105) } + +// Firefox120 sets the JA3/4 fingerprint to mimic Firefox version 120. +func (j *JA) Firefox120() *Builder { return j.SetHelloID(utls.HelloFirefox_120) } + +// Firefox141 sets the JA3/4 fingerprint to mimic Firefox version 141. +func (j *JA) Firefox141() *Builder { return j.SetHelloID(utls.HelloFirefox_141) } + +// Firefox144 sets the JA3/4 fingerprint to mimic Firefox version 144. +func (j *JA) Firefox144() *Builder { return j.SetHelloSpec(firefox.HelloFirefox_144) } + +// FirefoxPrivate144 sets the JA3/4 fingerprint to mimic Firefox private version 144. +func (j *JA) FirefoxPrivate144() *Builder { return j.SetHelloSpec(firefox.HelloFirefoxPrivate_144) } + +// Tor sets the JA3/4 fingerprint to mimic Tor Browser version 14.5.6. +func (j *JA) Tor() *Builder { return j.SetHelloSpec(firefox.Tor) } + +// TorPrivate sets the JA3/4 fingerprint to mimic Tor Browser private version 14.5.6. +func (j *JA) TorPrivate() *Builder { return j.SetHelloSpec(firefox.TorPrivate) } + +// IOS sets the JA3/4 fingerprint to mimic the latest iOS Safari browser (auto-detection). +func (j *JA) IOS() *Builder { return j.SetHelloID(utls.HelloIOS_Auto) } + +// IOS11 sets the JA3/4 fingerprint to mimic iOS 11.1 Safari. +func (j *JA) IOS11() *Builder { return j.SetHelloID(utls.HelloIOS_11_1) } + +// IOS12 sets the JA3/4 fingerprint to mimic iOS 12.1 Safari. +func (j *JA) IOS12() *Builder { return j.SetHelloID(utls.HelloIOS_12_1) } + +// IOS13 sets the JA3/4 fingerprint to mimic iOS 13 Safari. +func (j *JA) IOS13() *Builder { return j.SetHelloID(utls.HelloIOS_13) } + +// IOS14 sets the JA3/4 fingerprint to mimic iOS 14 Safari. +func (j *JA) IOS14() *Builder { return j.SetHelloID(utls.HelloIOS_14) } + +// Randomized sets a completely randomized JA3/4 fingerprint. +func (j *JA) Randomized() *Builder { return j.SetHelloID(utls.HelloRandomized) } + +// RandomizedALPN sets a randomized JA3/4 fingerprint with ALPN (Application-Layer Protocol Negotiation). +func (j *JA) RandomizedALPN() *Builder { return j.SetHelloID(utls.HelloRandomizedALPN) } + +// RandomizedNoALPN sets a randomized JA3/4 fingerprint without ALPN. +func (j *JA) RandomizedNoALPN() *Builder { return j.SetHelloID(utls.HelloRandomizedNoALPN) } + +// Safari sets the JA3/4 fingerprint to mimic the latest Safari browser (auto-detection). +func (j *JA) Safari() *Builder { return j.SetHelloID(utls.HelloSafari_Auto) } diff --git a/backend/vendor/github.com/enetx/surf/ja_roundtripper.go b/backend/vendor/github.com/enetx/surf/ja_roundtripper.go new file mode 100644 index 0000000..a1be67c --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/ja_roundtripper.go @@ -0,0 +1,328 @@ +package surf + +import ( + "context" + "crypto/tls" + "fmt" + "net" + "slices" + "strings" + + "github.com/enetx/g" + "github.com/enetx/g/cell" + "github.com/enetx/g/ref" + "github.com/enetx/http" + "github.com/enetx/http2" + + utls "github.com/enetx/utls" +) + +type roundtripper struct { + transport *http.Transport + clientSessionCache utls.ClientSessionCache + ja *JA + cachedTransports *g.MapSafe[string, *cell.LazyCell[g.Result[http.RoundTripper]]] +} + +func newRoundTripper(ja *JA, base http.RoundTripper) http.RoundTripper { + transport, ok := base.(*http.Transport) + if !ok { + panic("surf: underlying transport must be *http.Transport") + } + + rt := &roundtripper{ + transport: transport, + ja: ja, + cachedTransports: g.NewMapSafe[string, *cell.LazyCell[g.Result[http.RoundTripper]]](), + } + + if ja.builder.cli.tlsConfig.ClientSessionCache != nil { + rt.clientSessionCache = utls.NewLRUClientSessionCache(0) + } + + return rt +} + +func (rt *roundtripper) RoundTrip(req *http.Request) (*http.Response, error) { + addr := rt.address(req) + scheme := g.String(req.URL.Scheme).Lower() + entry := rt.cachedTransports.Entry(addr) + + cellOpt := entry.OrSetBy(func() *cell.LazyCell[g.Result[http.RoundTripper]] { + ctx := req.Context() + + return cell.NewLazy(func() g.Result[http.RoundTripper] { + var ( + tr http.RoundTripper + err error + ) + + switch scheme { + case "http": + tr = rt.buildHTTP1Transport() + case "https": + tr, err = rt.buildHTTPSTransport(ctx, addr) + default: + err = fmt.Errorf("invalid URL scheme: [%v]", req.URL.Scheme) + } + + return g.ResultOf(tr, err) + }) + }) + + var cellRef *cell.LazyCell[g.Result[http.RoundTripper]] + + if cellOpt.IsSome() { + cellRef = cellOpt.Some() + } else { + cellRef = entry.Get().Some() + } + + initRes := cellRef.Force() + + if initRes.IsErr() { + rt.cachedTransports.Delete(addr) + return nil, initRes.Err() + } + + tr := initRes.Ok() + + resp, err := tr.RoundTrip(req) + if resp == nil && err == nil { + return nil, fmt.Errorf("surf: transport %T returned for %s", tr, req.URL) + } + + return resp, err +} + +func (rt *roundtripper) CloseIdleConnections() { + type closeIdler interface{ CloseIdleConnections() } + + for addr, lazy := range rt.cachedTransports.Iter() { + if transport := lazy.Force(); transport.IsOk() { + if ci, ok := transport.Ok().(closeIdler); ok { + ci.CloseIdleConnections() + } + } + + rt.cachedTransports.Delete(addr) + } +} + +func (rt *roundtripper) buildHTTPSTransport(ctx context.Context, addr string) (http.RoundTripper, error) { + negProto, err := rt.probeALPN(ctx, addr) + if err != nil { + return nil, err + } + + switch negProto { + case http2.NextProtoTLS: + return rt.buildHTTP2Transport(), nil + default: + return rt.buildHTTP1Transport(), nil + } +} + +func (rt *roundtripper) probeALPN(ctx context.Context, addr string) (string, error) { + conn, err := rt.tlsHandshake(ctx, "tcp", addr) + if err != nil { + return "", err + } + + defer conn.Close() + + return conn.ConnectionState().NegotiatedProtocol, nil +} + +func (rt *roundtripper) dialTLSHTTP2(ctx context.Context, network, addr string, _ *tls.Config) (net.Conn, error) { + return rt.dialTLS(ctx, network, addr) +} + +func (rt *roundtripper) dialTLS(ctx context.Context, network, addr string) (net.Conn, error) { + return rt.tlsHandshake(ctx, network, addr) +} + +func (rt *roundtripper) tlsHandshake(ctx context.Context, network, addr string) (*utls.UConn, error) { + rawConn, err := rt.transport.DialContext(ctx, network, addr) + if err != nil { + return nil, err + } + + host, _, err := net.SplitHostPort(addr) + if err != nil { + host = addr + } + + spec := rt.ja.getSpec() + if spec.IsErr() { + _ = rawConn.Close() + return nil, spec.Err() + } + + if rt.ja.builder.forceHTTP1 { + setAlpnProtocolToHTTP1(ref.Of(spec.Ok())) + } + + config := &utls.Config{ + ServerName: host, + InsecureSkipVerify: true, + SessionTicketsDisabled: true, + OmitEmptyPsk: true, + } + + if supportsResumption(spec.Ok()) && rt.clientSessionCache != nil { + config.ClientSessionCache = rt.clientSessionCache + config.PreferSkipResumptionOnNilExtension = true + config.SessionTicketsDisabled = false + } + + uconn := utls.UClient(rawConn, config, utls.HelloCustom) + if err = uconn.ApplyPreset(ref.Of(spec.Ok())); err != nil { + _ = uconn.Close() + return nil, err + } + + if err = uconn.HandshakeContext(ctx); err != nil { + _ = uconn.Close() + + if strings.Contains(err.Error(), "CurvePreferences includes unsupported curve") { + return nil, fmt.Errorf("conn.HandshakeContext() error for tls 1.3 (please retry request): %+v", err) + } + + return nil, fmt.Errorf("uTlsConn.HandshakeContext() error: %+v", err) + } + + return uconn, nil +} + +func (rt *roundtripper) address(req *http.Request) string { + host, port, err := net.SplitHostPort(req.URL.Host) + if err == nil { + return net.JoinHostPort(host, port) + } + + var defaultPort string + switch g.String(req.URL.Scheme).Lower() { + case "http": + defaultPort = defaultHTTPPort + case "https": + defaultPort = defaultHTTPSPort + default: + defaultPort = defaultHTTPSPort + } + + return net.JoinHostPort(req.URL.Host, defaultPort) +} + +func (rt *roundtripper) buildHTTP1Transport() *http.Transport { + t := rt.transport.Clone() + t.DialTLSContext = rt.dialTLS + + return t +} + +func (rt *roundtripper) buildHTTP2Transport() *http2.Transport { + t := new(http2.Transport) + + t.DialTLSContext = rt.dialTLSHTTP2 + t.DisableCompression = rt.transport.DisableCompression + t.IdleConnTimeout = rt.transport.IdleConnTimeout + t.TLSClientConfig = rt.transport.TLSClientConfig + + if rt.ja.builder.http2settings != nil { + h := rt.ja.builder.http2settings + + appendSetting := func(id http2.SettingID, val uint32) { + if val != 0 || (id == http2.SettingEnablePush && h.usePush) { + t.Settings = append(t.Settings, http2.Setting{ID: id, Val: val}) + } + } + + settings := [...]struct { + id http2.SettingID + val uint32 + }{ + {http2.SettingHeaderTableSize, h.headerTableSize}, + {http2.SettingEnablePush, h.enablePush}, + {http2.SettingMaxConcurrentStreams, h.maxConcurrentStreams}, + {http2.SettingInitialWindowSize, h.initialWindowSize}, + {http2.SettingMaxFrameSize, h.maxFrameSize}, + {http2.SettingMaxHeaderListSize, h.maxHeaderListSize}, + } + + for _, s := range settings { + appendSetting(s.id, s.val) + } + + if h.connectionFlow != 0 { + t.ConnectionFlow = h.connectionFlow + } + + if !h.priorityParam.IsZero() { + t.PriorityParam = h.priorityParam + } + + if h.priorityFrames != nil { + t.PriorityFrames = h.priorityFrames + } + } + + return t +} + +func supportsResumption(spec utls.ClientHelloSpec) bool { + var ( + hasSessionTicket bool + hasPskModes bool + hasPreSharedKey bool // includes real and fake PSK extensions + ) + + for _, ext := range spec.Extensions { + switch ext.(type) { + case *utls.SessionTicketExtension: + hasSessionTicket = true + case *utls.PSKKeyExchangeModesExtension: + hasPskModes = true + case *utls.UtlsPreSharedKeyExtension, *utls.FakePreSharedKeyExtension: + hasPreSharedKey = true + } + } + + // If any TLS 1.3 PSK-related extensions are present, + // session resumption is considered valid only when all required + // TLS 1.3 resumption indicators are present simultaneously. + if hasPskModes || hasPreSharedKey { + return hasSessionTicket && hasPskModes && hasPreSharedKey + } + + // Otherwise, fall back to TLS 1.2 semantics where the presence of + // SessionTicketExtension alone indicates support for session resumption. + return hasSessionTicket +} + +// setAlpnProtocolToHTTP1 updates the ALPN protocols of the provided ClientHelloSpec to include +// "http/1.1". +// +// It modifies the ALPN protocols of the first ALPNExtension found in the extensions of the +// provided spec. +// If no ALPNExtension is found, it does nothing. +// +// Note that this function modifies the provided spec in-place. +func setAlpnProtocolToHTTP1(utlsSpec *utls.ClientHelloSpec) { + for _, ext := range utlsSpec.Extensions { + alpns, ok := ext.(*utls.ALPNExtension) + if !ok { + continue + } + + if i := slices.Index(alpns.AlpnProtocols, "h2"); i != -1 { + alpns.AlpnProtocols = slices.Delete(alpns.AlpnProtocols, i, i+1) + } + + if !slices.Contains(alpns.AlpnProtocols, "http/1.1") { + alpns.AlpnProtocols = append(alpns.AlpnProtocols, "http/1.1") + } + + break + } +} diff --git a/backend/vendor/github.com/enetx/surf/middleware.go b/backend/vendor/github.com/enetx/surf/middleware.go new file mode 100644 index 0000000..cdf94d1 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/middleware.go @@ -0,0 +1,72 @@ +package surf + +import ( + "github.com/enetx/g" + "github.com/enetx/g/cmp" +) + +// mw represents a middleware wrapper that holds the function itself, +// its execution priority, and the order in which it was added. +type mw[T any] struct { + fn func(T) error // Middleware function + priority g.Int // Execution priority (lower is higher priority) + order g.Int // Insertion order (used to stabilize sorting) +} + +// middleware is a generic middleware chain manager for type T. +// It uses a priority heap to manage the execution order of middleware functions. +type middleware[T any] struct { + heap *g.Heap[mw[T]] // Heap-ordered middleware functions + counter g.Int // Monotonic counter to track insertion order +} + +// newMiddleware creates a new middleware manager for type T. +// +// Returns: +// - *middleware[T]: a pointer to a new middleware instance +// +// Lower priority values execute earlier. For equal priorities, insertion order is preserved. +func newMiddleware[T any]() *middleware[T] { + return &middleware[T]{ + heap: g.NewHeap(func(a, b mw[T]) cmp.Ordering { + return a.priority.Cmp(b.priority). + Then(a.order.Cmp(b.order)) + }), + } +} + +// add adds a middleware function to the chain with the specified priority. +// +// Parameters: +// - priority int: determines execution order (lower means earlier execution) +// - fn func(T) error: the middleware function that receives a context of type T +// +// Functions with the same priority are executed in the order they were added. +func (m *middleware[T]) add(priority g.Int, fn func(T) error) { + m.heap.Push(mw[T]{fn, priority, m.counter}) + m.counter++ +} + +// run executes all middleware functions in priority order. +// +// Parameters: +// - ctx T: the context value passed to each middleware function +// +// Returns: +// - error: the first error encountered in the chain, or nil if all passed +// +// Note: +// - A clone of the heap is used during execution to avoid mutating the original chain. +// - Execution stops immediately if any middleware returns a non-nil error. +func (m *middleware[T]) run(ctx T) error { + clone := m.heap.Clone() + + for !clone.Empty() { + item := clone.Pop().Some() + if err := item.fn(ctx); err != nil { + return err + } + } + + return nil +} diff --git a/backend/vendor/github.com/enetx/surf/middleware_client.go b/backend/vendor/github.com/enetx/surf/middleware_client.go new file mode 100644 index 0000000..f904177 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/middleware_client.go @@ -0,0 +1,363 @@ +package surf + +import ( + "context" + "crypto/tls" + "fmt" + "maps" + "math/rand" + "net" + "net/url" + "time" + + "github.com/enetx/g" + "github.com/enetx/http" + "github.com/enetx/http/cookiejar" + "github.com/enetx/http2" + "golang.org/x/net/publicsuffix" +) + +// defaultDialerMW initializes the default network dialer for the surf client. +// Sets up timeout and keep-alive configuration for TCP connections. +func defaultDialerMW(client *Client) error { + client.dialer = &net.Dialer{Timeout: _dialerTimeout, KeepAlive: _TCPKeepAlive} + return nil +} + +// defaultTLSConfigMW initializes the default TLS configuration for the surf client. +// Configures TLS settings with insecure skip verify enabled by default for flexibility. +func defaultTLSConfigMW(client *Client) error { + client.tlsConfig = &tls.Config{InsecureSkipVerify: true} + return nil +} + +// defaultTransportMW initializes the default HTTP transport for the surf client. +// Configures connection pooling, timeouts, and enables HTTP/2 support by default. +func defaultTransportMW(client *Client) error { + transport := http.DefaultTransport.(*http.Transport).Clone() + transport.DialContext = client.dialer.DialContext + transport.TLSClientConfig = client.tlsConfig + transport.MaxIdleConns = _maxIdleConns + transport.MaxConnsPerHost = _maxConnsPerHost + transport.MaxIdleConnsPerHost = _maxIdleConnsPerHost + transport.IdleConnTimeout = _idleConnTimeout + transport.ForceAttemptHTTP2 = true + + client.transport = transport + + return nil +} + +// defaultClientMW initializes the default HTTP client for the surf client. +// Sets up the HTTP client with the configured transport and timeout settings. +func defaultClientMW(client *Client) error { + client.cli = &http.Client{Transport: client.transport, Timeout: _clientTimeout} + return nil +} + +// boundaryMW sets a custom boundary function for multipart form data. +// The boundary function is called to generate unique boundaries for multipart requests. +func boundaryMW(client *Client, boundary func() g.String) error { + client.boundary = boundary + return nil +} + +// forseHTTP1MW configures the client to use HTTP/1.1 forcefully. +// Disables HTTP/2 and forces the client to use only HTTP/1.1 protocol. +func forseHTTP1MW(client *Client) error { + transport := client.GetTransport().(*http.Transport) + transport.Protocols = new(http.Protocols) + transport.Protocols.SetHTTP1(true) + return nil +} + +// sessionMW configures the client's cookie jar for session management. +// It initializes a new cookie jar and sets up the TLS configuration +// to manage client sessions efficiently. +func sessionMW(client *Client) error { + client.GetClient().Jar, _ = cookiejar.New(&cookiejar.Options{PublicSuffixList: publicsuffix.List}) + client.GetTLSConfig().ClientSessionCache = tls.NewLRUClientSessionCache(0) + return nil +} + +// disableKeepAliveMW disables the keep-alive setting for the client's transport. +func disableKeepAliveMW(client *Client) error { + client.GetTransport().(*http.Transport).DisableKeepAlives = true + return nil +} + +// disableCompressionMW disables compression for the client's transport. +func disableCompressionMW(client *Client) error { + client.GetTransport().(*http.Transport).DisableCompression = true + return nil +} + +// interfaceAddrMW configures the client's local network interface address for outbound connections. +// This allows binding the client to a specific network interface or IP address for dialing. +// Useful for systems with multiple network interfaces or for controlling which IP address to use. +func interfaceAddrMW(client *Client, address g.String) error { + if address != "" { + ip, err := net.ResolveTCPAddr("tcp", address.Std()+":0") + if err != nil { + return err + } + + client.GetDialer().LocalAddr = ip + } + + return nil +} + +// timeoutMW configures the client's overall request timeout. +// This sets the maximum duration for entire HTTP requests including connection, +// request transmission, and response reading. +func timeoutMW(client *Client, timeout time.Duration) error { + client.GetClient().Timeout = timeout + return nil +} + +// redirectPolicyMW configures the client's HTTP redirect handling behavior. +// Sets up redirect policies including maximum redirect count, host-only redirects, +// header forwarding on redirects, and custom redirect functions. +func redirectPolicyMW(client *Client) error { + builder := client.builder + maxRedirects := _maxRedirects + + if builder != nil { + // Use custom redirect function if provided + if builder.checkRedirect != nil { + client.GetClient().CheckRedirect = builder.checkRedirect + return nil + } + + // Override default max redirects if specified + if builder.maxRedirects != 0 { + maxRedirects = builder.maxRedirects + } + } + + // Set up default redirect policy with configured behavior + client.GetClient().CheckRedirect = func(req *http.Request, via []*http.Request) error { + // Stop redirecting if maximum redirect count is exceeded + if len(via) >= maxRedirects { + return http.ErrUseLastResponse + } + + if builder != nil { + // Only follow redirects within the same host if configured + if builder.followOnlyHostRedirects { + newHost := req.URL.Host + oldHost := via[0].Host + + if oldHost == "" { + oldHost = via[0].URL.Host + } + + if newHost != oldHost { + return http.ErrUseLastResponse + } + } + + // Forward headers from original request to redirect if configured + if builder.forwardHeadersOnRedirect { + maps.Copy(req.Header, via[0].Header) + } + } + + return nil + } + + return nil +} + +// dnsMW configures a custom DNS server for the client. +// Sets up the client to use the specified DNS server address for hostname resolution +// instead of the system's default DNS configuration. +func dnsMW(client *Client, dns g.String) error { + if dns.Empty() { + return nil + } + + client.GetDialer().Resolver = &net.Resolver{ + PreferGo: true, + Dial: func(ctx context.Context, _, _ string) (net.Conn, error) { + var dialer net.Dialer + return dialer.DialContext(ctx, "udp", dns.Std()) + }, + } + + return nil +} + +// dnsTLSMW configures DNS over TLS (DoT) for the client. +// Replaces the default DNS resolver with a secure DNS-over-TLS resolver +// to encrypt DNS queries and protect against DNS manipulation. +func dnsTLSMW(client *Client, resolver *net.Resolver) error { + client.GetDialer().Resolver = resolver + return nil +} + +// unixSocketMW configures the client to connect via Unix domain sockets. +// Replaces the standard TCP connection with Unix socket communication, +// useful for connecting to local services that expose Unix socket interfaces. +func unixSocketMW(client *Client, address g.String) error { + if address.Empty() { + return nil + } + + client.GetTransport().(*http.Transport).DialContext = func(ctx context.Context, _, _ string) (net.Conn, error) { + return (&net.Dialer{}).DialContext(ctx, "unix", address.Std()) + } + + return nil +} + +// proxyMW configures HTTP proxy settings for the client transport. +// Supports both static proxy configurations (string URLs) and dynamic proxy providers +// (functions that return proxy URLs for rotation). Handles various proxy types including +// HTTP, HTTPS, and SOCKS proxies. Skips configuration for JA3 and HTTP/3 transports +// which handle proxies differently. +func proxyMW(client *Client, proxys any) error { + // Skip proxy configuration for JA3 transport (handled separately) + if client.builder.ja { + return nil + } + + // Skip if HTTP/3 transport is being used (handled separately) + if _, ok := client.GetTransport().(*uquicTransport); ok { + return nil + } + + transport, ok := client.GetTransport().(*http.Transport) + if !ok { + return fmt.Errorf("transport is not *http.Transport") + } + + // Clear proxy if nil provided + if proxys == nil { + transport.Proxy = nil + return nil + } + + // Helper function to set static proxy + setProxy := func(proxy string) { + if proxy == "" { + return + } + if proxyURL, err := url.Parse(proxy); err == nil { + transport.Proxy = http.ProxyURL(proxyURL) + } else { + transport.Proxy = func(*http.Request) (*url.URL, error) { + return nil, fmt.Errorf("invalid proxy URL %q: %w", proxy, err) + } + } + } + + // Handle static proxy configurations + switch v := proxys.(type) { + case string: + setProxy(v) + return nil + case g.String: + setProxy(v.Std()) + return nil + } + + // Handle dynamic proxy configurations - evaluate proxy per request + transport.Proxy = func(*http.Request) (*url.URL, error) { + var proxy string + + switch v := proxys.(type) { + case func() g.String: + proxy = v().Std() + case []string: + if len(v) > 0 { + proxy = v[rand.Intn(len(v))] + } + case g.Slice[string]: + proxy = v.Random() + case g.Slice[g.String]: + proxy = v.Random().Std() + default: + return nil, fmt.Errorf("unsupported proxy type: %T", proxys) + } + + if proxy == "" { + return nil, nil + } + + return url.Parse(proxy) + } + + return nil +} + +// h2cMW configures HTTP/2 Cleartext (H2C) support for the client. +// H2C allows HTTP/2 communication over plain text connections without TLS. +// This is useful for internal communication or development scenarios where TLS is not required. +// Skips configuration if HTTP/3 transport is being used as they are incompatible. +func h2cMW(client *Client) error { + // H2C is incompatible with HTTP/3 transport - skip if HTTP/3 is being used + if _, ok := client.transport.(*uquicTransport); ok { + return nil + } + + t2 := new(http2.Transport) + + // Configure H2C specific settings + t2.AllowHTTP = true + t2.DisableCompression = client.GetTransport().(*http.Transport).DisableCompression + t2.IdleConnTimeout = client.transport.(*http.Transport).IdleConnTimeout + + // Override TLS dial to use plain text connections + t2.DialTLSContext = func(_ context.Context, network, addr string, _ *tls.Config) (net.Conn, error) { + return net.Dial(network, addr) + } + + // Apply HTTP/2 settings if configured + if client.builder.http2settings != nil { + h := client.builder.http2settings + + // Helper function to append non-zero settings + appendSetting := func(id http2.SettingID, val uint32) { + if val != 0 || (id == http2.SettingEnablePush && h.usePush) { + t2.Settings = append(t2.Settings, http2.Setting{ID: id, Val: val}) + } + } + + // Apply all configured HTTP/2 settings + settings := [...]struct { + id http2.SettingID + val uint32 + }{ + {http2.SettingHeaderTableSize, h.headerTableSize}, + {http2.SettingEnablePush, h.enablePush}, + {http2.SettingMaxConcurrentStreams, h.maxConcurrentStreams}, + {http2.SettingInitialWindowSize, h.initialWindowSize}, + {http2.SettingMaxFrameSize, h.maxFrameSize}, + {http2.SettingMaxHeaderListSize, h.maxHeaderListSize}, + } + + for _, s := range settings { + appendSetting(s.id, s.val) + } + + // Apply flow control settings if configured + if h.connectionFlow != 0 { + t2.ConnectionFlow = h.connectionFlow + } + + // Apply priority settings if configured + if !h.priorityParam.IsZero() { + t2.PriorityParam = h.priorityParam + } + + if h.priorityFrames != nil { + t2.PriorityFrames = h.priorityFrames + } + } + + client.cli.Transport = t2 + + return nil +} diff --git a/backend/vendor/github.com/enetx/surf/middleware_request.go b/backend/vendor/github.com/enetx/surf/middleware_request.go new file mode 100644 index 0000000..f12bfeb --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/middleware_request.go @@ -0,0 +1,144 @@ +package surf + +import ( + "errors" + "fmt" + "math/rand" + "net/textproto" + + "github.com/enetx/g" + "github.com/enetx/http/httptrace" + "github.com/enetx/surf/header" +) + +// defaultUserAgentMW sets the default User-Agent header for surf requests. +// Only sets the header if no User-Agent is already present in the request. +// Uses the predefined _userAgent constant as the default value. +func defaultUserAgentMW(req *Request) error { + if headers := req.GetRequest().Header; headers.Get(header.USER_AGENT) == "" { + // Set the default user-agent header. + headers.Set(header.USER_AGENT, _userAgent) + } + + return nil +} + +// userAgentMW configures a custom User-Agent header for HTTP requests. +// Supports various input types for flexibility: +// - string or g.String: Uses the value directly +// - []string or g.Slice[string]: Randomly selects from the slice (useful for rotation) +// - g.Slice[g.String]: Randomly selects from g.String slice +// Returns an error for unsupported types or empty slices. +func userAgentMW(req *Request, userAgent any) error { + var ua string + + switch v := userAgent.(type) { + case string: + ua = v + case g.String: + ua = v.Std() + case []string: + if len(v) == 0 { + return &ErrUserAgentType{"cannot select a random user agent from an empty slice"} + } + ua = v[rand.Intn(len(v))] + case g.Slice[string]: + if v.Empty() { + return &ErrUserAgentType{"cannot select a random user agent from an empty slice"} + } + ua = v.Random() + case g.Slice[g.String]: + if v.Empty() { + return &ErrUserAgentType{"cannot select a random user agent from an empty slice"} + } + ua = v.Random().Std() + default: + return &ErrUserAgentType{fmt.Sprintf("'%T' %v", v, v)} + } + + req.GetRequest().Header.Set(header.USER_AGENT, ua) + + return nil +} + +// got101ResponseMW configures request tracing to handle HTTP 101 Switching Protocols responses. +// Sets up client trace callbacks to detect and handle protocol switching responses. +// Returns an error specifically for HTTP 101 responses to allow special handling of protocol upgrades. +// Other 1xx responses are ignored and allowed to proceed normally. +func got101ResponseMW(req *Request) error { + req.WithContext(httptrace.WithClientTrace(req.GetRequest().Context(), + &httptrace.ClientTrace{ + Got1xxResponse: func(code int, _ textproto.MIMEHeader) error { + if code != 101 { + return nil + } + + return &Err101ResponseCode{ + fmt.Sprintf(`%s "%s" error:`, req.request.Method, req.request.URL.String()), + } + }, + }, + )) + + return nil +} + +// remoteAddrMW configures request tracing to capture the remote server address. +// Sets up client trace callbacks to extract and store the remote address +// of the server connection for later access. This information can be useful +// for logging, debugging, or connection analysis purposes. +func remoteAddrMW(req *Request) error { + req.WithContext(httptrace.WithClientTrace(req.GetRequest().Context(), + &httptrace.ClientTrace{ + GotConn: func(info httptrace.GotConnInfo) { req.remoteAddr = info.Conn.RemoteAddr() }, + }, + )) + + return nil +} + +// bearerAuthMW configures Bearer token authentication for HTTP requests. +// Adds an Authorization header with the Bearer token format if a token is provided. +// Only sets the header if the token is not empty, allowing conditional authentication. +func bearerAuthMW(req *Request, token g.String) error { + if token.NotEmpty() { + req.AddHeaders(g.Map[g.String, g.String]{header.AUTHORIZATION: "Bearer " + token}) + } + + return nil +} + +// basicAuthMW configures HTTP Basic Authentication for requests. +// Expects authentication string in "username:password" format. +// Skips setting auth if Authorization header already exists. +// Returns an error if username or password fields are empty. +func basicAuthMW(req *Request, authentication g.String) error { + if req.GetRequest().Header.Get(header.AUTHORIZATION) != "" { + return nil + } + + var username, password g.String + + authentication.Split(":").Collect().Unpack(&username, &password) + + if username == "" || password == "" { + return errors.New("basic authorization fields cannot be empty") + } + + req.GetRequest().SetBasicAuth(username.Std(), password.Std()) + + return nil +} + +// contentTypeMW configures the Content-Type header for HTTP requests. +// Sets the MIME type of the request body content to inform the server +// how to interpret the request data. Returns an error if contentType is empty. +func contentTypeMW(req *Request, contentType g.String) error { + if contentType.Empty() { + return fmt.Errorf("Content-Type is empty") + } + + req.SetHeaders(g.Map[g.String, g.String]{header.CONTENT_TYPE: contentType}) + + return nil +} diff --git a/backend/vendor/github.com/enetx/surf/middleware_response.go b/backend/vendor/github.com/enetx/surf/middleware_response.go new file mode 100644 index 0000000..ed2a52d --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/middleware_response.go @@ -0,0 +1,74 @@ +package surf + +import ( + "compress/gzip" + "compress/zlib" + "fmt" + "io" + + "github.com/andybalholm/brotli" + "github.com/enetx/http" + "github.com/enetx/surf/header" + "github.com/klauspost/compress/zstd" +) + +// closeIdleConnectionsMW forces the client to close idle connections after each response. +// This middleware is useful when using non-singleton clients to prevent connection leaks +// and ensure clean resource management. Particularly important for JA3 fingerprinting scenarios. +func closeIdleConnectionsMW(r *Response) error { + r.cli.CloseIdleConnections() + return nil +} + +// webSocketUpgradeErrorMW detects and handles WebSocket upgrade responses. +// Returns an error when a response indicates a successful WebSocket protocol upgrade +// (HTTP 101 Switching Protocols with Upgrade: websocket header). +// This allows special handling of WebSocket connections which require different processing. +func webSocketUpgradeErrorMW(r *Response) error { + if r.StatusCode == http.StatusSwitchingProtocols && r.Headers.Get(header.UPGRADE) == "websocket" { + return &ErrWebSocketUpgrade{fmt.Sprintf(`%s "%s" error:`, r.request.request.Method, r.URL.String())} + } + + return nil +} + +// decodeBodyMW automatically decompresses response bodies based on Content-Encoding header. +// Supports multiple compression algorithms: +// - deflate: DEFLATE compression (zlib format) +// - gzip: GZIP compression +// - br: Brotli compression +// - zstd: Zstandard compression +// Updates the response body reader to provide decompressed content transparently. +// Returns an error if decompression fails, otherwise the body can be read normally. +func decodeBodyMW(r *Response) error { + if r.Body == nil { + return nil + } + + var ( + reader io.ReadCloser + err error + ) + + switch r.Headers.Get(header.CONTENT_ENCODING) { + case "deflate": + reader, err = zlib.NewReader(r.Body.Reader) + case "gzip": + reader, err = gzip.NewReader(r.Body.Reader) + case "br": + reader = io.NopCloser(brotli.NewReader(r.Body.Reader)) + case "zstd": + decoder, err := zstd.NewReader(r.Body.Reader) + if err != nil { + return err + } + + reader = decoder.IOReadCloser() + } + + if err == nil && reader != nil { + r.Body.Reader = reader + } + + return err +} diff --git a/backend/vendor/github.com/enetx/surf/pkg/connectproxy/connectproxy.go b/backend/vendor/github.com/enetx/surf/pkg/connectproxy/connectproxy.go new file mode 100644 index 0000000..f64d399 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/pkg/connectproxy/connectproxy.go @@ -0,0 +1,315 @@ +package connectproxy + +import ( + "bufio" + "context" + "crypto/tls" + "encoding/base64" + "fmt" + "io" + "maps" + "net" + "net/url" + "strings" + "sync" + + "github.com/enetx/http" + "github.com/enetx/http2" + "golang.org/x/net/proxy" +) + +type ( + ErrProxyURL struct{ Msg string } + ErrProxyStatus struct{ Msg string } + ErrPasswordEmpty struct{ Msg string } + ErrProxyEmpty struct{} +) + +func (e *ErrProxyURL) Error() string { return fmt.Sprintf("bad proxy url: %s", e.Msg) } +func (e *ErrProxyStatus) Error() string { return fmt.Sprintf("proxy response status: %s", e.Msg) } +func (e *ErrPasswordEmpty) Error() string { return fmt.Sprintf("password is empty: %s", e.Msg) } +func (e *ErrProxyEmpty) Error() string { return "proxy is not set" } + +type proxyDialer struct { + ProxyURL *url.URL + DefaultHeader http.Header + + // overridden dialer allow to control establishment of TCP connection + Dialer net.Dialer + + // overridden DialTLS allows user to control establishment of TLS connection + // MUST return connection with completed Handshake, and NegotiatedProtocol + DialTLS func(network, address string) (net.Conn, string, error) + + h2Mu sync.Mutex + h2Conn *http2.ClientConn + conn net.Conn + + tr2 *http2.Transport +} + +const ( + schemeHTTP = "http" + schemeHTTPS = "https" + socks5 = "socks5" + socks5H = "socks5h" +) + +func NewDialer(proxy string) (*proxyDialer, error) { + parsed, err := url.Parse(proxy) + if err != nil { + return nil, err + } + + if parsed.Host == "" { + return nil, &ErrProxyURL{proxy} + } + + switch parsed.Scheme { + case "": + return nil, &ErrProxyURL{proxy} + case schemeHTTP: + if parsed.Port() == "" { + parsed.Host = net.JoinHostPort(parsed.Host, "80") + } + case schemeHTTPS: + if parsed.Port() == "" { + parsed.Host = net.JoinHostPort(parsed.Host, "443") + } + case socks5, socks5H: + if parsed.Port() == "" { + parsed.Host = net.JoinHostPort(parsed.Host, "1080") + } + default: + return nil, &ErrProxyURL{proxy} + } + + proxyDialer := &proxyDialer{ + ProxyURL: parsed, + DefaultHeader: make(http.Header), + } + + if parsed.User != nil { + if parsed.User.Username() != "" { + password, ok := parsed.User.Password() + if !ok { + return nil, &ErrPasswordEmpty{proxy} + } + + auth := parsed.User.Username() + ":" + password + basicAuth := "Basic " + base64.StdEncoding.EncodeToString([]byte(auth)) + proxyDialer.DefaultHeader.Add("Proxy-Authorization", basicAuth) + } + } + + return proxyDialer, nil +} + +func (c *proxyDialer) Dial(network, address string) (net.Conn, error) { + return c.DialContext(context.Background(), network, address) +} + +type ContextKeyHeader struct{} + +func (c *proxyDialer) connectHTTP1(req *http.Request, conn net.Conn) error { + req.Proto = "HTTP/1.1" + req.ProtoMajor = 1 + req.ProtoMinor = 1 + + err := req.Write(conn) + if err != nil { + _ = conn.Close() + return err + } + + resp, err := http.ReadResponse(bufio.NewReader(conn), req) + if err != nil { + _ = conn.Close() + return err + } + + if resp.StatusCode != http.StatusOK { + _ = conn.Close() + return &ErrProxyStatus{resp.Status} + } + + return nil +} + +func (c *proxyDialer) connectHTTP2(req *http.Request, conn net.Conn, h2clientConn *http2.ClientConn) (net.Conn, error) { + req.Proto = "HTTP/2.0" + req.ProtoMajor = 2 + req.ProtoMinor = 0 + pr, pw := io.Pipe() + req.Body = pr + + resp, err := h2clientConn.RoundTrip(req) + if err != nil { + _ = conn.Close() + return nil, err + } + + if resp.StatusCode != http.StatusOK { + _ = conn.Close() + return nil, &ErrProxyStatus{resp.Status} + } + + return newHTTP2Conn(conn, pw, resp.Body), nil +} + +func (c *proxyDialer) DialContext(ctx context.Context, network, address string) (net.Conn, error) { + if c.ProxyURL == nil { + return nil, &ErrProxyEmpty{} + } + + if strings.HasPrefix(c.ProxyURL.Scheme, "socks") { + dial, err := proxy.FromURL(c.ProxyURL, proxy.Direct) + if err != nil { + return nil, err + } + + return dial.(proxy.ContextDialer).DialContext(ctx, network, address) + } + + req := (&http.Request{ + Method: http.MethodConnect, + URL: &url.URL{Host: address}, + Header: make(http.Header), + Host: address, + }).WithContext(ctx) + + maps.Copy(req.Header, c.DefaultHeader) + + if ctxHeader, ctxHasHeader := ctx.Value(ContextKeyHeader{}).(http.Header); ctxHasHeader { + maps.Copy(req.Header, ctxHeader) + } + + c.h2Mu.Lock() + unlocked := false + + if c.h2Conn != nil && c.conn != nil { + if c.h2Conn.CanTakeNewRequest() { + rc := c.conn + cc := c.h2Conn + c.h2Mu.Unlock() + unlocked = true + proxyConn, err := c.connectHTTP2(req, rc, cc) + if err == nil { + return proxyConn, nil + } + } + } + + if !unlocked { + c.h2Mu.Unlock() + } + + rawConn, negotiatedProtocol, err := c.initProxyConn(ctx, network) + if err != nil { + return nil, err + } + + return c.connect(req, rawConn, negotiatedProtocol) +} + +func (c *proxyDialer) initProxyConn(ctx context.Context, network string) (net.Conn, string, error) { + var ( + rawConn net.Conn + negotiatedProtocol string + err error + ) + + switch c.ProxyURL.Scheme { + case schemeHTTP: + rawConn, err = c.Dialer.DialContext(ctx, network, c.ProxyURL.Host) + if err != nil { + return nil, "", err + } + + case schemeHTTPS: + if c.DialTLS != nil { + rawConn, negotiatedProtocol, err = c.DialTLS(network, c.ProxyURL.Host) + if err != nil { + return nil, "", err + } + } else { + tlsConf := tls.Config{ + NextProtos: []string{"h2", "http/1.1"}, + ServerName: c.ProxyURL.Hostname(), + InsecureSkipVerify: true, + } + + var tlsConn *tls.Conn + tlsConn, err = tls.Dial(network, c.ProxyURL.Host, &tlsConf) + if err != nil { + return nil, "", err + } + + err = tlsConn.Handshake() + if err != nil { + return nil, "", err + } + + negotiatedProtocol = tlsConn.ConnectionState().NegotiatedProtocol + rawConn = tlsConn + } + default: + return nil, "", &ErrProxyURL{c.ProxyURL.String()} + } + + return rawConn, negotiatedProtocol, err +} + +func (c *proxyDialer) connect(req *http.Request, conn net.Conn, negotiatedProtocol string) (net.Conn, error) { + if negotiatedProtocol == http2.NextProtoTLS { + if c.tr2 == nil { + c.tr2 = new(http2.Transport) + } + + if h2clientConn, err := c.tr2.NewClientConn(conn); err == nil { + if proxyConn, err := c.connectHTTP2(req, conn, h2clientConn); err == nil { + c.h2Mu.Lock() + c.h2Conn = h2clientConn + c.conn = conn + c.h2Mu.Unlock() + return proxyConn, err + } + } + } + + if err := c.connectHTTP1(req, conn); err != nil { + _ = conn.Close() + return nil, err + } + + return conn, nil +} + +func newHTTP2Conn(c net.Conn, pipedReqBody *io.PipeWriter, respBody io.ReadCloser) net.Conn { + return &http2Conn{Conn: c, in: pipedReqBody, out: respBody} +} + +type http2Conn struct { + net.Conn + in *io.PipeWriter + out io.ReadCloser +} + +func (h *http2Conn) Close() error { + var retErr error + + if err := h.in.Close(); err != nil { + retErr = err + } + if err := h.out.Close(); err != nil { + retErr = err + } + + return retErr +} + +func (h *http2Conn) Read(p []byte) (n int, err error) { return h.out.Read(p) } +func (h *http2Conn) Write(p []byte) (n int, err error) { return h.in.Write(p) } +func (h *http2Conn) CloseConn() error { return h.Conn.Close() } +func (h *http2Conn) CloseWrite() error { return h.in.Close() } +func (h *http2Conn) CloseRead() error { return h.out.Close() } diff --git a/backend/vendor/github.com/enetx/surf/pkg/quicconn/quic_conn.go b/backend/vendor/github.com/enetx/surf/pkg/quicconn/quic_conn.go new file mode 100644 index 0000000..1a9b822 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/pkg/quicconn/quic_conn.go @@ -0,0 +1,409 @@ +// Package quicconn provides a net.PacketConn adapter for feeding QUIC stacks +// (such as quic-go) with datagrams originating from a generic net.Conn. +// +// Typical usage is tunneling QUIC over a UDP-capable proxy (e.g. a SOCKS5 UDP +// associate). Some proxy clients expose the UDP relay as a stream-like +// net.Conn. QUIC, however, requires a net.PacketConn. This package bridges the +// gap by wrapping that net.Conn and implementing net.PacketConn on top. +// +// Two encapsulation modes are supported: +// 1. EncapRaw — pass raw UDP payloads through; the dialer / proxy stack +// is assumed to take care of any required encapsulation. +// 2. EncapSocks5 — add / remove RFC 1928 UDP ASSOCIATE headers on the fly, +// so you can drive a UDP relay directly using a plain net.Conn. +// +// The adapter also exposes optional SetReadBuffer / SetWriteBuffer methods. +// quic-go detects these via type assertions and will attempt to tune socket +// buffers when available. If the underlying connection doesn't support them, +// these methods no-op and return nil. See: +// https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes +package quicconn + +import ( + "encoding/binary" + "errors" + "fmt" + "io" + "net" + "sync" + "time" +) + +// ErrDefaultTargetRequired is returned when a destination address is needed +// but neither an explicit addr nor defaultTarget are provided. +var ErrDefaultTargetRequired = errors.New("defaultTarget required for QUIC/UDP") + +// EncapMode describes how UDP datagrams are encapsulated over the underlying +// net.Conn transport. +type EncapMode int + +const ( + // EncapRaw forwards raw datagrams as-is. Use this when the component that + // created the underlying net.Conn already handles UDP encapsulation (e.g., + // a SOCKS5 client that returns a UDP-capable net.Conn). + EncapRaw EncapMode = iota + + // EncapSocks5 wraps outgoing datagrams in RFC 1928 UDP ASSOCIATE headers and + // strips those headers on receive. Use this when you talk to a SOCKS5 UDP + // relay over a plain net.Conn and need to perform the encapsulation yourself. + EncapSocks5 +) + +// QuicPacketConn adapts a stream-like net.Conn into a packet-oriented +// net.PacketConn suitable for QUIC. When mode is EncapSocks5, it performs +// RFC 1928 UDP encapsulation/decapsulation on the fly. +// +// The defaultTarget is used as the destination for WriteTo when addr is nil, +// and as a fallback source address in ReadFrom when the relay doesn't expose +// a peer address. +type QuicPacketConn struct { + conn net.Conn + mode EncapMode + defaultTarget *net.UDPAddr + readBuf []byte + writeBuf []byte + + rmu sync.Mutex // guards readBuf and ReadFrom + wmu sync.Mutex // guards writeBuf and WriteTo +} + +// Ensure QuicPacketConn implements net.PacketConn at compile time. +var _ net.PacketConn = (*QuicPacketConn)(nil) + +// New creates a new QuicPacketConn adapter around a connected transport. +// +// Parameters: +// - conn: a connected transport (e.g., a UDP-capable proxy connection). +// - defaultTarget: default peer address used when WriteTo is called with addr == nil, +// and used as a fallback source address in ReadFrom when the relay does not supply one. +// - mode: encapsulation mode (EncapRaw or EncapSocks5). +// +// Default target requirements: +// - EncapRaw: defaultTarget MUST be non-nil. If it is nil, New panics. In raw mode the +// adapter cannot infer a UDP peer address from a generic net.Conn. +// - EncapSocks5: defaultTarget may be nil because the SOCKS5 UDP header carries the peer +// address. Providing a non-nil defaultTarget is still recommended as a fallback for +// relays that might strip the header. +// +// The returned value implements net.PacketConn and can be passed to QUIC dialers +// (e.g., quic-go's quic.Dial). +func New(conn net.Conn, defaultTarget *net.UDPAddr, mode EncapMode) *QuicPacketConn { + if defaultTarget == nil && mode == EncapRaw { + panic("quicconn: defaultTarget is required for QUIC/UDP in EncapRaw mode") + } + + return &QuicPacketConn{ + conn: conn, + mode: mode, + defaultTarget: defaultTarget, + readBuf: make([]byte, 64*1024), + writeBuf: make([]byte, 0, 1500), + } +} + +// SetReadBuffer optionally sets the receive buffer size if the underlying +// connection exposes such an option (e.g., *net.UDPConn or any type with +// SetReadBuffer(int) error). If unsupported, this method is a no-op and +// returns nil. quic-go probes for this method via type assertion. +func (q *QuicPacketConn) SetReadBuffer(n int) error { + if u, ok := q.conn.(*net.UDPConn); ok { + return u.SetReadBuffer(n) + } + + type rb interface{ SetReadBuffer(int) error } + if u, ok := q.conn.(rb); ok { + return u.SetReadBuffer(n) + } + + return nil +} + +// SetWriteBuffer optionally sets the send buffer size if the underlying +// connection exposes such an option (e.g., *net.UDPConn or any type with +// SetWriteBuffer(int) error). If unsupported, this method is a no-op and +// returns nil. quic-go probes for this method via type assertion. +func (q *QuicPacketConn) SetWriteBuffer(n int) error { + if u, ok := q.conn.(*net.UDPConn); ok { + return u.SetWriteBuffer(n) + } + + type wb interface{ SetWriteBuffer(int) error } + if u, ok := q.conn.(wb); ok { + return u.SetWriteBuffer(n) + } + + return nil +} + +// ReadFrom reads a single datagram into p and returns the number of bytes, +// the source address, and any error encountered. In EncapSocks5 mode, it +// removes the RFC 1928 header and returns the payload with decoded source +// address. If no header is present, the packet is treated as raw. +func (q *QuicPacketConn) ReadFrom(p []byte) (int, net.Addr, error) { + q.rmu.Lock() + defer q.rmu.Unlock() + + // Calculate required readBuf size + need := len(p) + if q.mode == EncapSocks5 { + // Reserve space for RFC1928 header: RSV/FRAG(3) + ATYP(1) + addr(<=16) + port(2) + // Maximum: 3 + 1 + 16 + 2 = 22, using 32 for safety margin + need += 32 + } + + if need > len(q.readBuf) { + // Growth strategy: double current size or exact need, whichever is larger + newSize := max(need, 2*len(q.readBuf)) + q.readBuf = make([]byte, newSize) + } + + n, err := q.conn.Read(q.readBuf) + if err != nil { + return 0, nil, err + } + + switch q.mode { + case EncapSocks5: + payload, src, ok, perr := parseSocks5UDP(q.readBuf[:n]) + if perr != nil { + return 0, nil, perr + } + + if !ok { + if len(q.readBuf[:n]) > len(p) { + return 0, nil, errors.New("buffer too small") + } + + if q.defaultTarget == nil { + return 0, nil, ErrDefaultTargetRequired + } + + copy(p, q.readBuf[:n]) + + return n, q.defaultTarget, nil + } + + if len(payload) > len(p) { + return 0, nil, errors.New("buffer too small for SOCKS5 UDP payload") + } + + copy(p, payload) + + return len(payload), src, nil + default: // EncapRaw + if len(q.readBuf[:n]) > len(p) { + return 0, nil, errors.New("buffer too small") + } + + if q.defaultTarget == nil { + return 0, nil, ErrDefaultTargetRequired + } + + copy(p, q.readBuf[:n]) + + return n, q.defaultTarget, nil + } +} + +// WriteTo writes datagram p to addr. If addr is nil, defaultTarget is used. +// In EncapSocks5 mode, the datagram is wrapped in an RFC 1928 UDP header. +// In EncapRaw mode, p is forwarded as-is. +func (q *QuicPacketConn) WriteTo(p []byte, addr net.Addr) (int, error) { + q.wmu.Lock() + defer q.wmu.Unlock() + + dst := q.defaultTarget + if addr != nil { + ua, ok := addr.(*net.UDPAddr) + if !ok { + return 0, errors.New("WriteTo expects *net.UDPAddr") + } + + dst = ua + } + + if dst == nil { + return 0, ErrDefaultTargetRequired + } + + if q.mode == EncapSocks5 { + hdr, err := buildSocks5UDP(dst) + if err != nil { + return 0, err + } + + // Calculate required buffer size for header + payload + need := len(hdr) + len(p) + if need > cap(q.writeBuf) { + // Growth strategy: double current capacity or exact need, whichever is larger + newCap := max(need, 2*cap(q.writeBuf)) + q.writeBuf = make([]byte, 0, newCap) + } + + // Reuse internal buffer to avoid allocs. + q.writeBuf = append(q.writeBuf[:0], hdr...) + q.writeBuf = append(q.writeBuf, p...) + + n, err := q.conn.Write(q.writeBuf) + if err != nil { + return 0, err + } + + if n < len(q.writeBuf) { + return 0, io.ErrShortWrite + } + + return len(p), nil + } + + // EncapRaw + n, err := q.conn.Write(p) + if err != nil { + return 0, err + } + + if n < len(p) { + return 0, io.ErrShortWrite + } + + return len(p), nil +} + +// Close closes the underlying connection. +func (q *QuicPacketConn) Close() error { + return q.conn.Close() +} + +// LocalAddr reports the local network address. It delegates to the underlying +// connection. +func (q *QuicPacketConn) LocalAddr() net.Addr { + return q.conn.LocalAddr() +} + +// SetDeadline sets both read and write deadlines on the underlying connection. +func (q *QuicPacketConn) SetDeadline(t time.Time) error { + return q.conn.SetDeadline(t) +} + +// SetReadDeadline sets the read deadline on the underlying connection. +func (q *QuicPacketConn) SetReadDeadline(t time.Time) error { + return q.conn.SetReadDeadline(t) +} + +// SetWriteDeadline sets the write deadline on the underlying connection. +func (q *QuicPacketConn) SetWriteDeadline(t time.Time) error { + return q.conn.SetWriteDeadline(t) +} + +// buildSocks5UDP constructs an RFC 1928 UDP ASSOCIATE header for the given +// destination address. Only literal IP destinations are supported; domain +// names must be resolved by the caller. +func buildSocks5UDP(dst *net.UDPAddr) ([]byte, error) { + if dst == nil { + return nil, errors.New("nil destination") + } + + h := make([]byte, 0, 4+16+2) + h = append(h, 0x00, 0x00, 0x00) // RSV(2) + FRAG(1) + + if ip4 := dst.IP.To4(); ip4 != nil { + h = append(h, 0x01) // ATYP = IPv4 + h = append(h, ip4...) + } else if ip6 := dst.IP.To16(); ip6 != nil { + h = append(h, 0x04) // ATYP = IPv6 + h = append(h, ip6...) + } else { + return nil, errors.New("destination IP not set") + } + + port := make([]byte, 2) + binary.BigEndian.PutUint16(port, uint16(dst.Port)) + h = append(h, port...) + + return h, nil +} + +// parseSocks5UDP parses an RFC 1928 UDP ASSOCIATE datagram. +// It returns the payload, the decoded source address (for IPv4/IPv6 ATYP), +// a boolean indicating whether a SOCKS5 header was present, and an error. +// Domain-name ATYP on receive is not supported and results in (true, error). +func parseSocks5UDP(pkt []byte) ([]byte, net.Addr, bool, error) { + if len(pkt) < 4 { + return nil, nil, false, nil + } + + if pkt[0] != 0x00 || pkt[1] != 0x00 { + return nil, nil, false, nil + } + + // FRAG must be 0x00 (fragmentation not supported). + if pkt[2] != 0x00 { + return nil, nil, true, errors.New("SOCKS5 UDP fragmentation not supported (FRAG != 0)") + } + + atyp := pkt[3] + off := 4 + + var ip net.IP + + switch atyp { + case 0x01: // IPv4 + if len(pkt) < off+4+2 { + return nil, nil, true, errors.New("short IPv4 SOCKS5 UDP packet") + } + + ip = net.IP(pkt[off : off+4]) + off += 4 + case 0x04: // IPv6 + if len(pkt) < off+16+2 { + return nil, nil, true, errors.New("short IPv6 SOCKS5 UDP packet") + } + + ip = net.IP(pkt[off : off+16]) + off += 16 + case 0x03: // DOMAIN + if len(pkt) < off+1 { + return nil, nil, true, errors.New("short domain length") + } + + dlen := int(pkt[off]) + off++ + if len(pkt) < off+dlen+2 { + return nil, nil, true, errors.New("short domain SOCKS5 UDP packet") + } + + return nil, nil, true, errors.New("DOMAIN ATYP not supported on receive") + default: + return nil, nil, true, errors.New("unknown ATYP") + } + + if len(pkt) < off+2 { + return nil, nil, true, errors.New("short port") + } + + port := int(binary.BigEndian.Uint16(pkt[off : off+2])) + off += 2 + + if len(pkt) < off { + return nil, nil, true, errors.New("bad payload offset") + } + + return pkt[off:], &net.UDPAddr{IP: ip, Port: port}, true, nil +} + +// ConnKey computes a stable map key for a net.PacketConn, preferring the local +// address string and falling back to the pointer value. Useful for connection +// caches keyed by a PacketConn identity. +func ConnKey(pc net.PacketConn) string { + if pc == nil { + return "pc:nil" + } + + if la := pc.LocalAddr(); la != nil { + if s := la.String(); s != "" { + return "la:" + s + } + } + + return fmt.Sprintf("ptr:%p", pc) +} diff --git a/backend/vendor/github.com/enetx/surf/pkg/sse/sse.go b/backend/vendor/github.com/enetx/surf/pkg/sse/sse.go new file mode 100644 index 0000000..ee96b5a --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/pkg/sse/sse.go @@ -0,0 +1,79 @@ +package sse + +import ( + "bufio" + "io" + + "github.com/enetx/g" +) + +// Event represents a Server-Sent Event. +type Event struct { + ID g.String // ID uniquely identifies the event. + Event g.String // Event specifies the type of the event. + Data g.String // Data holds the raw JSON data associated with the event as a string. + Retry g.Int // Retry indicates the number of retry attempts for the event. +} + +// reset resets the event fields to their zero values or initial states. +func (e *Event) reset() { + e.ID = "" + e.Event = "" + e.Data = "" + e.Retry = 0 +} + +// parse parses the event data based on the event type. +func (e *Event) parse(t, data g.String) { + data = data.Trim() + + switch t.Trim() { + case "event": + e.Event = data + case "id": + e.ID = data + case "retry": + e.Retry = data.ToInt().UnwrapOr(-1) + case "data": + e.Data = data + } +} + +// Skip checks if the event should be skipped. +func (e *Event) Skip() bool { + if e.Data.Empty() { + return true + } + + return g.SliceOf[g.String]("", "null", "undefined"). + Iter(). + Any(func(s g.String) bool { return e.Data.Eq(s) }) +} + +// Done checks if the event processing is done. +func (e *Event) Done() bool { return e.Data.Eq("[DONE]") } + +// Read reads Server-Sent Events (SSE) from the provided reader and calls the provided function for each event. +func Read(reader io.Reader, fn func(event *Event) bool) error { + var event Event + + scanner := bufio.NewScanner(reader) + for scanner.Scan() { + line := g.String(scanner.Text()) + + delimiter := line.Index(":") + if delimiter == -1 { + if !fn(&event) { + return nil + } + + event.reset() + continue + } + + t, data := line[:delimiter], line[delimiter+1:] + event.parse(t, data) + } + + return scanner.Err() +} diff --git a/backend/vendor/github.com/enetx/surf/profiles/chrome/142.go b/backend/vendor/github.com/enetx/surf/profiles/chrome/142.go new file mode 100644 index 0000000..3e572b1 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/profiles/chrome/142.go @@ -0,0 +1,73 @@ +package chrome + +import utls "github.com/enetx/utls" + +var HelloChrome_142 = utls.ClientHelloSpec{ + CipherSuites: []uint16{ + utls.GREASE_PLACEHOLDER, + utls.TLS_AES_128_GCM_SHA256, + utls.TLS_AES_256_GCM_SHA384, + utls.TLS_CHACHA20_POLY1305_SHA256, + utls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + utls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + utls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + utls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + utls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + utls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + utls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + utls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + utls.TLS_RSA_WITH_AES_128_GCM_SHA256, + utls.TLS_RSA_WITH_AES_256_GCM_SHA384, + utls.TLS_RSA_WITH_AES_128_CBC_SHA, + utls.TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{0x00}, + Extensions: utls.ShuffleChromeTLSExtensions( + []utls.TLSExtension{ + &utls.UtlsGREASEExtension{}, + &utls.SNIExtension{}, + &utls.ExtendedMasterSecretExtension{}, + &utls.RenegotiationInfoExtension{Renegotiation: utls.RenegotiateOnceAsClient}, + &utls.SupportedCurvesExtension{Curves: []utls.CurveID{ + utls.GREASE_PLACEHOLDER, + utls.X25519MLKEM768, + utls.X25519, + utls.CurveP256, + utls.CurveP384, + }}, + &utls.SupportedPointsExtension{SupportedPoints: []byte{0x00}}, + &utls.SessionTicketExtension{}, + &utls.ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &utls.StatusRequestExtension{}, + &utls.SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []utls.SignatureScheme{ + utls.ECDSAWithP256AndSHA256, + utls.PSSWithSHA256, + utls.PKCS1WithSHA256, + utls.ECDSAWithP384AndSHA384, + utls.PSSWithSHA384, + utls.PKCS1WithSHA384, + utls.PSSWithSHA512, + utls.PKCS1WithSHA512, + }}, + &utls.SCTExtension{}, + &utls.KeyShareExtension{KeyShares: []utls.KeyShare{ + {Group: utls.GREASE_PLACEHOLDER, Data: []byte{0}}, + {Group: utls.X25519MLKEM768}, + {Group: utls.X25519}, + }}, + &utls.PSKKeyExchangeModesExtension{Modes: []uint8{utls.PskModeDHE}}, + &utls.SupportedVersionsExtension{Versions: []uint16{ + utls.GREASE_PLACEHOLDER, + utls.VersionTLS13, + utls.VersionTLS12, + }}, + &utls.UtlsCompressCertExtension{Algorithms: []utls.CertCompressionAlgo{ + utls.CertCompressionBrotli, + }}, + &utls.ApplicationSettingsExtensionNew{SupportedProtocols: []string{"h2"}}, + utls.BoringGREASEECH(), + &utls.UtlsGREASEExtension{}, + &utls.UtlsPreSharedKeyExtension{}, + }, + ), +} diff --git a/backend/vendor/github.com/enetx/surf/profiles/chrome/chrome.go b/backend/vendor/github.com/enetx/surf/profiles/chrome/chrome.go new file mode 100644 index 0000000..6dd5bc6 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/profiles/chrome/chrome.go @@ -0,0 +1,170 @@ +package chrome + +import ( + "crypto/rand" + + "github.com/enetx/g" + "github.com/enetx/g/cmp" + "github.com/enetx/http" + "github.com/enetx/surf/header" +) + +// Blink implementation: https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/renderer/platform/network/form_data_encoder.cc;drc=1d694679493c7b2f7b9df00e967b4f8699321093;l=130 +// WebKit implementation: https://github.com/WebKit/WebKit/blob/main/Source/WebCore/platform/network/FormDataBuilder.cpp#L120 +func Boundary() g.String { + // C++ + // Vector generateUniqueBoundaryString() + // { + // Vector boundary; + // + // // The RFC 2046 spec says the alphanumeric characters plus the + // // following characters are legal for boundaries: '()+_,-./:=? + // // However the following characters, though legal, cause some sites + // // to fail: (),./:=+ + // // Note that our algorithm makes it twice as much likely for 'A' or 'B' + // // to appear in the boundary string, because 0x41 and 0x42 are present in + // // the below array twice. + // static constexpr std::array alphaNumericEncodingMap { + // 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, + // 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, + // 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, + // 0x59, 0x5A, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, + // 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, + // 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, + // 0x77, 0x78, 0x79, 0x7A, 0x30, 0x31, 0x32, 0x33, + // 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x41, 0x42 + // }; + // + // // Start with an informative prefix. + // append(boundary, "----WebKitFormBoundary"); + // + // // Append 16 random 7-bit ASCII alphanumeric characters. + // for (unsigned i = 0; i < 4; ++i) { + // unsigned randomness = cryptographicallyRandomNumber(); + // boundary.append(alphaNumericEncodingMap[(randomness >> 24) & 0x3F]); + // boundary.append(alphaNumericEncodingMap[(randomness >> 16) & 0x3F]); + // boundary.append(alphaNumericEncodingMap[(randomness >> 8) & 0x3F]); + // boundary.append(alphaNumericEncodingMap[randomness & 0x3F]); + // } + // + // return boundary; + // } + + prefix := "----WebKitFormBoundary" + + alphaNumericEncodingMap := []byte{ + 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, + 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, + 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, + 0x59, 0x5A, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, + 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, + 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, + 0x77, 0x78, 0x79, 0x7A, 0x30, 0x31, 0x32, 0x33, + 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x41, 0x42, + } + + boundary := []byte(prefix) + + for range 4 { + randomBytes := make([]byte, 4) + rand.Read(randomBytes) + + randomness := uint32(randomBytes[0])<<24 | + uint32(randomBytes[1])<<16 | + uint32(randomBytes[2])<<8 | + uint32(randomBytes[3]) + + boundary = append(boundary, alphaNumericEncodingMap[(randomness>>24)&0x3F]) + boundary = append(boundary, alphaNumericEncodingMap[(randomness>>16)&0x3F]) + boundary = append(boundary, alphaNumericEncodingMap[(randomness>>8)&0x3F]) + boundary = append(boundary, alphaNumericEncodingMap[randomness&0x3F]) + } + + return g.String(boundary) +} + +var headerOrder = g.Map[string, g.Slice[string]]{ + http.MethodGet: { + ":method", + ":authority", + ":scheme", + ":path", + header.SEC_CH_UA, + header.SEC_CH_UA_MOBILE, + header.SEC_CH_UA_PLATFORM, + header.AUTHORIZATION, + header.UPGRADE_INSECURE_REQUESTS, + header.USER_AGENT, + header.ACCEPT, + header.SEC_FETCH_SITE, + header.SEC_FETCH_MODE, + header.SEC_FETCH_USER, + header.SEC_FETCH_DEST, + header.REFERER, + header.ACCEPT_ENCODING, + header.ACCEPT_LANGUAGE, + header.COOKIE, + header.PRIORITY, + }, + + http.MethodPost: { + ":method", + ":authority", + ":scheme", + ":path", + header.CONTENT_LENGTH, + header.PRAGMA, + header.CACHE_CONTROL, + header.SEC_CH_UA_PLATFORM, + header.AUTHORIZATION, + header.USER_AGENT, + header.SEC_CH_UA, + header.CONTENT_TYPE, + header.SEC_CH_UA_MOBILE, + header.ACCEPT, + header.ORIGIN, + header.SEC_FETCH_SITE, + header.SEC_FETCH_MODE, + header.SEC_FETCH_DEST, + header.REFERER, + header.ACCEPT_ENCODING, + header.ACCEPT_LANGUAGE, + header.COOKIE, + header.PRIORITY, + }, +} + +func Headers[T ~string](headers *g.MapOrd[T, T], method string) { + switch method { + case http.MethodPost: + headers.Set(header.ACCEPT, "*/*") + headers.Set(header.CACHE_CONTROL, "no-cache") + headers.Set(header.CONTENT_TYPE, "") + headers.Set(header.PRAGMA, "no-cache") + headers.Set(header.PRIORITY, "u=1, i") + headers.Set(header.SEC_FETCH_DEST, "empty") + headers.Set(header.SEC_FETCH_MODE, "cors") + headers.Set(header.SEC_FETCH_SITE, "same-origin") + default: + headers.Set( + header.ACCEPT, + "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7", + ) + headers.Set(header.PRIORITY, "u=0, i") + headers.Set(header.SEC_FETCH_DEST, "document") + headers.Set(header.SEC_FETCH_MODE, "navigate") + headers.Set(header.SEC_FETCH_SITE, "none") + headers.Set(header.SEC_FETCH_USER, "?1") + headers.Set(header.UPGRADE_INSECURE_REQUESTS, "1") + } + + headers.SortByKey(func(a, b T) cmp.Ordering { + m := headerOrder.Get(method).UnwrapOr(headerOrder[http.MethodGet]) + + enum := m.Iter().Enumerate().Collect().Invert() + ida := enum.Get(string(a)) + idb := enum.Get(string(b)) + + return ida.UnwrapOrDefault().Cmp(idb.UnwrapOrDefault()) + }) +} diff --git a/backend/vendor/github.com/enetx/surf/profiles/firefox/144.go b/backend/vendor/github.com/enetx/surf/profiles/firefox/144.go new file mode 100644 index 0000000..e2e7ad8 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/profiles/firefox/144.go @@ -0,0 +1,254 @@ +package firefox + +import ( + utls "github.com/enetx/utls" + "github.com/enetx/utls/dicttls" +) + +var HelloFirefox_144 = utls.ClientHelloSpec{ + TLSVersMin: utls.VersionTLS12, + TLSVersMax: utls.VersionTLS13, + CipherSuites: []uint16{ + utls.TLS_AES_128_GCM_SHA256, + utls.TLS_CHACHA20_POLY1305_SHA256, + utls.TLS_AES_256_GCM_SHA384, + utls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + utls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + utls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + utls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + utls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + utls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + utls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + utls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + utls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + utls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + utls.TLS_RSA_WITH_AES_128_GCM_SHA256, + utls.TLS_RSA_WITH_AES_256_GCM_SHA384, + utls.TLS_RSA_WITH_AES_128_CBC_SHA, + utls.TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []utls.TLSExtension{ + &utls.SNIExtension{}, + &utls.ExtendedMasterSecretExtension{}, + &utls.RenegotiationInfoExtension{ + Renegotiation: utls.RenegotiateOnceAsClient, + }, + &utls.SupportedCurvesExtension{ + Curves: []utls.CurveID{ + utls.X25519MLKEM768, + utls.X25519, + utls.CurveP256, + utls.CurveP384, + utls.CurveP521, + 256, + 257, + }, + }, + &utls.SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // uncompressed + }, + }, + &utls.SessionTicketExtension{}, + &utls.ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &utls.StatusRequestExtension{}, + &utls.DelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []utls.SignatureScheme{ + utls.ECDSAWithP256AndSHA256, + utls.ECDSAWithP384AndSHA384, + utls.ECDSAWithP521AndSHA512, + utls.ECDSAWithSHA1, + }, + }, + &utls.SCTExtension{}, + &utls.KeyShareExtensionExtended{ + KeyShareExtension: &utls.KeyShareExtension{KeyShares: []utls.KeyShare{ + { + Group: utls.X25519MLKEM768, + }, + { + Group: utls.X25519, + }, + { + Group: utls.CurveP256, + }, + }}, + HybridReuseKey: true, + }, + &utls.SupportedVersionsExtension{ + Versions: []uint16{ + utls.VersionTLS13, + utls.VersionTLS12, + }, + }, + &utls.SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []utls.SignatureScheme{ + utls.ECDSAWithP256AndSHA256, + utls.ECDSAWithP384AndSHA384, + utls.ECDSAWithP521AndSHA512, + utls.PSSWithSHA256, + utls.PSSWithSHA384, + utls.PSSWithSHA512, + utls.PKCS1WithSHA256, + utls.PKCS1WithSHA384, + utls.PKCS1WithSHA512, + utls.ECDSAWithSHA1, + utls.PKCS1WithSHA1, + }, + }, + &utls.PSKKeyExchangeModesExtension{Modes: []uint8{ + utls.PskModeDHE, + }}, + &utls.FakeRecordSizeLimitExtension{ + Limit: 0x4001, + }, + &utls.UtlsCompressCertExtension{Algorithms: []utls.CertCompressionAlgo{ + utls.CertCompressionZlib, + utls.CertCompressionBrotli, + utls.CertCompressionZstd, + }}, + &utls.GREASEEncryptedClientHelloExtension{ + CandidateCipherSuites: []utls.HPKESymmetricCipherSuite{ + { + KdfId: dicttls.HKDF_SHA256, + AeadId: dicttls.AEAD_AES_128_GCM, + }, + { + KdfId: dicttls.HKDF_SHA256, + AeadId: dicttls.AEAD_CHACHA20_POLY1305, + }, + }, + CandidatePayloadLens: []uint16{223}, // +16: 239 + }, + }, +} + +var HelloFirefoxPrivate_144 = utls.ClientHelloSpec{ + TLSVersMin: utls.VersionTLS12, + TLSVersMax: utls.VersionTLS13, + CipherSuites: []uint16{ + utls.TLS_AES_128_GCM_SHA256, + utls.TLS_CHACHA20_POLY1305_SHA256, + utls.TLS_AES_256_GCM_SHA384, + utls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + utls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + utls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + utls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + utls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + utls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + utls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + utls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + utls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + utls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + utls.TLS_RSA_WITH_AES_128_GCM_SHA256, + utls.TLS_RSA_WITH_AES_256_GCM_SHA384, + utls.TLS_RSA_WITH_AES_128_CBC_SHA, + utls.TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []utls.TLSExtension{ + &utls.SNIExtension{}, + &utls.ExtendedMasterSecretExtension{}, + &utls.RenegotiationInfoExtension{ + Renegotiation: utls.RenegotiateOnceAsClient, + }, + &utls.SupportedCurvesExtension{ + Curves: []utls.CurveID{ + utls.X25519MLKEM768, + utls.X25519, + utls.CurveP256, + utls.CurveP384, + utls.CurveP521, + 256, + 257, + }, + }, + &utls.SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // uncompressed + }, + }, + &utls.ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &utls.StatusRequestExtension{}, + &utls.DelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []utls.SignatureScheme{ + utls.ECDSAWithP256AndSHA256, + utls.ECDSAWithP384AndSHA384, + utls.ECDSAWithP521AndSHA512, + utls.ECDSAWithSHA1, + }, + }, + &utls.SCTExtension{}, + &utls.KeyShareExtensionExtended{ + KeyShareExtension: &utls.KeyShareExtension{KeyShares: []utls.KeyShare{ + { + Group: utls.X25519MLKEM768, + }, + { + Group: utls.X25519, + }, + { + Group: utls.CurveP256, + }, + }}, + HybridReuseKey: true, + }, + &utls.SupportedVersionsExtension{ + Versions: []uint16{ + utls.VersionTLS13, + utls.VersionTLS12, + }, + }, + &utls.SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []utls.SignatureScheme{ + utls.ECDSAWithP256AndSHA256, + utls.ECDSAWithP384AndSHA384, + utls.ECDSAWithP521AndSHA512, + utls.PSSWithSHA256, + utls.PSSWithSHA384, + utls.PSSWithSHA512, + utls.PKCS1WithSHA256, + utls.PKCS1WithSHA384, + utls.PKCS1WithSHA512, + utls.ECDSAWithSHA1, + utls.PKCS1WithSHA1, + }, + }, + &utls.FakeRecordSizeLimitExtension{ + Limit: 0x4001, + }, + &utls.UtlsCompressCertExtension{Algorithms: []utls.CertCompressionAlgo{ + utls.CertCompressionZlib, + utls.CertCompressionBrotli, + utls.CertCompressionZstd, + }}, + &utls.GREASEEncryptedClientHelloExtension{ + CandidateCipherSuites: []utls.HPKESymmetricCipherSuite{ + { + KdfId: dicttls.HKDF_SHA256, + AeadId: dicttls.AEAD_AES_128_GCM, + }, + { + KdfId: dicttls.HKDF_SHA256, + AeadId: dicttls.AEAD_CHACHA20_POLY1305, + }, + }, + CandidatePayloadLens: []uint16{223}, // +16: 239 + }, + }, +} diff --git a/backend/vendor/github.com/enetx/surf/profiles/firefox/firefox.go b/backend/vendor/github.com/enetx/surf/profiles/firefox/firefox.go new file mode 100644 index 0000000..13f9324 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/profiles/firefox/firefox.go @@ -0,0 +1,123 @@ +package firefox + +import ( + "crypto/rand" + "encoding/binary" + "net/http" + + "github.com/enetx/g" + "github.com/enetx/g/cmp" + "github.com/enetx/surf/header" +) + +// Firefox implementation: https://github.com/mozilla/gecko-dev/blob/master/dom/html/HTMLFormSubmission.cpp#L355 +func Boundary() g.String { + // C++ + // mBoundary.AssignLiteral("----geckoformboundary"); + // mBoundary.AppendInt(mozilla::RandomUint64OrDie(), 16); + // mBoundary.AppendInt(mozilla::RandomUint64OrDie(), 16); + + // prefix := "----geckoformboundary" + // var num1, num2 uint64 + // binary.Read(rand.Reader, binary.BigEndian, &num1) + // binary.Read(rand.Reader, binary.BigEndian, &num2) + // return g.Sprintf("%s%x%x", prefix, num1, num2) + + //////////////////////////////////////////////////////////////////////////// + + // C++ + // mBoundary.AssignLiteral("---------------------------"); + // mBoundary.AppendInt(static_cast(mozilla::RandomUint64OrDie())); + // mBoundary.AppendInt(static_cast(mozilla::RandomUint64OrDie())); + // mBoundary.AppendInt(static_cast(mozilla::RandomUint64OrDie())); + + prefix := g.String("---------------------------") + + var builder g.Builder + builder.WriteString(prefix) + + for range 3 { + var b [4]byte + rand.Read(b[:]) + builder.WriteString(g.Int(binary.LittleEndian.Uint32(b[:])).String()) + } + + return builder.String() +} + +var headerOrder = g.Map[string, g.Slice[string]]{ + http.MethodGet: { + ":method", + ":path", + ":authority", + ":scheme", + header.USER_AGENT, + header.ACCEPT, + header.ACCEPT_LANGUAGE, + header.ACCEPT_ENCODING, + header.REFERER, + header.AUTHORIZATION, + header.COOKIE, + header.UPGRADE_INSECURE_REQUESTS, + header.SEC_FETCH_DEST, + header.SEC_FETCH_MODE, + header.SEC_FETCH_SITE, + header.SEC_FETCH_USER, + header.PRIORITY, + }, + + http.MethodPost: { + ":method", + ":path", + ":authority", + ":scheme", + header.USER_AGENT, + header.ACCEPT, + header.ACCEPT_LANGUAGE, + header.ACCEPT_ENCODING, + header.REFERER, + header.CONTENT_TYPE, + header.AUTHORIZATION, + header.CONTENT_LENGTH, + header.ORIGIN, + header.COOKIE, + header.SEC_FETCH_DEST, + header.SEC_FETCH_MODE, + header.SEC_FETCH_SITE, + header.PRIORITY, + header.PRAGMA, + header.CACHE_CONTROL, + }, +} + +func Headers[T ~string](headers *g.MapOrd[T, T], method string) { + switch method { + case http.MethodPost: + headers.Set(header.ACCEPT, "*/*") + headers.Set(header.CACHE_CONTROL, "no-cache") + headers.Set(header.CONTENT_TYPE, "") + headers.Set(header.PRAGMA, "no-cache") + headers.Set(header.PRIORITY, "u=1, i") + headers.Set(header.SEC_FETCH_DEST, "empty") + headers.Set(header.SEC_FETCH_MODE, "cors") + headers.Set(header.SEC_FETCH_SITE, "same-origin") + default: + headers.Set(header.ACCEPT, "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8") + headers.Set(header.PRIORITY, "u=0, i") + headers.Set(header.SEC_FETCH_DEST, "document") + headers.Set(header.SEC_FETCH_MODE, "navigate") + headers.Set(header.SEC_FETCH_SITE, "none") + headers.Set(header.SEC_FETCH_USER, "?1") + headers.Set(header.UPGRADE_INSECURE_REQUESTS, "1") + } + + headers.SortByKey(func(a, b T) cmp.Ordering { + m := headerOrder.Get(method).UnwrapOr(headerOrder[http.MethodGet]) + + enum := m.Iter().Enumerate().Collect().Invert() + ida := enum.Get(string(a)) + idb := enum.Get(string(b)) + + return ida.UnwrapOrDefault().Cmp(idb.UnwrapOrDefault()) + }) +} diff --git a/backend/vendor/github.com/enetx/surf/profiles/firefox/tor.go b/backend/vendor/github.com/enetx/surf/profiles/firefox/tor.go new file mode 100644 index 0000000..e337e4d --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/profiles/firefox/tor.go @@ -0,0 +1,180 @@ +package firefox + +import ( + utls "github.com/enetx/utls" + "github.com/enetx/utls/dicttls" +) + +var Tor = utls.ClientHelloSpec{ + CipherSuites: []uint16{ + utls.TLS_AES_128_GCM_SHA256, + utls.TLS_CHACHA20_POLY1305_SHA256, + utls.TLS_AES_256_GCM_SHA384, + utls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + utls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + utls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, + utls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, + utls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + utls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + utls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + utls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + utls.TLS_RSA_WITH_AES_128_GCM_SHA256, + utls.TLS_RSA_WITH_AES_256_GCM_SHA384, + utls.TLS_RSA_WITH_AES_128_CBC_SHA, + utls.TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []uint8{0x00}, + Extensions: []utls.TLSExtension{ + &utls.SNIExtension{}, + &utls.ExtendedMasterSecretExtension{}, + &utls.RenegotiationInfoExtension{ + Renegotiation: utls.RenegotiateOnceAsClient, + }, + &utls.SupportedCurvesExtension{ + Curves: []utls.CurveID{ + utls.X25519, + utls.CurveP256, + utls.CurveP384, + utls.CurveP521, + 256, + 257, + }, + }, + &utls.SupportedPointsExtension{ + SupportedPoints: []uint8{0x00}, + }, + &utls.SessionTicketExtension{}, + &utls.ALPNExtension{ + AlpnProtocols: []string{"h2", "http/1.1"}, + }, + &utls.StatusRequestExtension{}, + &utls.FakeDelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []utls.SignatureScheme{ + utls.ECDSAWithP256AndSHA256, + utls.ECDSAWithP384AndSHA384, + utls.ECDSAWithP521AndSHA512, + utls.ECDSAWithSHA1, + }, + }, + &utls.KeyShareExtension{ + KeyShares: []utls.KeyShare{ + {Group: utls.X25519}, + {Group: utls.CurveP256}, + }, + }, + &utls.SupportedVersionsExtension{ + Versions: []uint16{utls.VersionTLS13, utls.VersionTLS12}, + }, + &utls.SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []utls.SignatureScheme{ + utls.ECDSAWithP256AndSHA256, + utls.ECDSAWithP384AndSHA384, + utls.ECDSAWithP521AndSHA512, + utls.PSSWithSHA256, + utls.PSSWithSHA384, + utls.PSSWithSHA512, + utls.PKCS1WithSHA256, + utls.PKCS1WithSHA384, + utls.PKCS1WithSHA512, + utls.ECDSAWithSHA1, + utls.PKCS1WithSHA1, + }, + }, + &utls.PSKKeyExchangeModesExtension{ + Modes: []uint8{utls.PskModeDHE}, + }, + &utls.FakeRecordSizeLimitExtension{Limit: 0x4001}, + &utls.GREASEEncryptedClientHelloExtension{ + CandidateCipherSuites: []utls.HPKESymmetricCipherSuite{ + {KdfId: dicttls.HKDF_SHA256, AeadId: dicttls.AEAD_AES_128_GCM}, + {KdfId: dicttls.HKDF_SHA256, AeadId: dicttls.AEAD_CHACHA20_POLY1305}, + }, + CandidatePayloadLens: []uint16{492}, + }, + }, +} + +var TorPrivate = utls.ClientHelloSpec{ + CipherSuites: []uint16{ + utls.TLS_AES_128_GCM_SHA256, + utls.TLS_CHACHA20_POLY1305_SHA256, + utls.TLS_AES_256_GCM_SHA384, + utls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + utls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + utls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, + utls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, + utls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + utls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + utls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + utls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + utls.TLS_RSA_WITH_AES_128_GCM_SHA256, + utls.TLS_RSA_WITH_AES_256_GCM_SHA384, + utls.TLS_RSA_WITH_AES_128_CBC_SHA, + utls.TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []uint8{0x00}, + Extensions: []utls.TLSExtension{ + &utls.SNIExtension{}, + &utls.ExtendedMasterSecretExtension{}, + &utls.RenegotiationInfoExtension{ + Renegotiation: utls.RenegotiateOnceAsClient, + }, + &utls.SupportedCurvesExtension{ + Curves: []utls.CurveID{ + utls.X25519, + utls.CurveP256, + utls.CurveP384, + utls.CurveP521, + 256, + 257, + }, + }, + &utls.SupportedPointsExtension{ + SupportedPoints: []uint8{0x00}, + }, + &utls.ALPNExtension{ + AlpnProtocols: []string{"h2", "http/1.1"}, + }, + &utls.StatusRequestExtension{}, + &utls.FakeDelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []utls.SignatureScheme{ + utls.ECDSAWithP256AndSHA256, + utls.ECDSAWithP384AndSHA384, + utls.ECDSAWithP521AndSHA512, + utls.ECDSAWithSHA1, + }, + }, + &utls.KeyShareExtension{ + KeyShares: []utls.KeyShare{ + {Group: utls.X25519}, + {Group: utls.CurveP256}, + }, + }, + &utls.SupportedVersionsExtension{ + Versions: []uint16{utls.VersionTLS13, utls.VersionTLS12}, + }, + &utls.SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []utls.SignatureScheme{ + utls.ECDSAWithP256AndSHA256, + utls.ECDSAWithP384AndSHA384, + utls.ECDSAWithP521AndSHA512, + utls.PSSWithSHA256, + utls.PSSWithSHA384, + utls.PSSWithSHA512, + utls.PKCS1WithSHA256, + utls.PKCS1WithSHA384, + utls.PKCS1WithSHA512, + utls.ECDSAWithSHA1, + utls.PKCS1WithSHA1, + }, + }, + &utls.FakeRecordSizeLimitExtension{Limit: 0x4001}, + &utls.GREASEEncryptedClientHelloExtension{ + CandidateCipherSuites: []utls.HPKESymmetricCipherSuite{ + {KdfId: dicttls.HKDF_SHA256, AeadId: dicttls.AEAD_AES_128_GCM}, + {KdfId: dicttls.HKDF_SHA256, AeadId: dicttls.AEAD_CHACHA20_POLY1305}, + }, + CandidatePayloadLens: []uint16{223}, + }, + }, +} diff --git a/backend/vendor/github.com/enetx/surf/request.go b/backend/vendor/github.com/enetx/surf/request.go new file mode 100644 index 0000000..0858d23 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/request.go @@ -0,0 +1,283 @@ +package surf + +import ( + "context" + "fmt" + "io" + "net" + "time" + + "github.com/enetx/g" + "github.com/enetx/http" + "github.com/enetx/surf/header" + "github.com/enetx/surf/internal/drainbody" + "github.com/enetx/surf/profiles/chrome" + "github.com/enetx/surf/profiles/firefox" +) + +// Request represents an HTTP request with additional surf-specific functionality. +// It wraps the standard http.Request and provides enhanced features like middleware support, +// retry capabilities, remote address tracking, and structured error handling. +type Request struct { + request *http.Request // The underlying standard HTTP request + cli *Client // The associated surf client for this request + werr *error // Pointer to error encountered during request writing/preparation + err error // General error associated with the request (validation, setup, etc.) + remoteAddr net.Addr // Remote server address captured during connection + body io.ReadCloser // Request body reader (for retry support and body preservation) +} + +// GetRequest returns the underlying standard http.Request. +// Provides access to the wrapped HTTP request for advanced use cases. +func (req *Request) GetRequest() *http.Request { return req.request } + +// Do executes the HTTP request and returns a Response wrapped in a Result type. +// This is the main method that performs the actual HTTP request with full surf functionality: +// - Applies request middleware (authentication, headers, tracing, etc.) +// - Preserves request body for potential retries +// - Implements retry logic with configurable status codes and delays +// - Measures request timing for performance analysis +// - Handles request preparation errors and write errors +func (req *Request) Do() g.Result[*Response] { + // Return early if request has preparation errors + if req.err != nil { + return g.Err[*Response](req.err) + } + + // Apply all configured request middleware + if err := req.cli.applyReqMW(req); err != nil { + return g.Err[*Response](err) + } + + // Preserve request body for retries (except HEAD requests which have no body) + if req.request.Method != http.MethodHead { + req.body, req.request.Body, req.err = drainbody.DrainBody(req.request.Body) + if req.err != nil { + return g.Err[*Response](req.err) + } + } + + var ( + resp *http.Response + attempts int + err error + ) + + start := time.Now() + cli := req.cli.cli + + builder := req.cli.builder + + // Execute request with retry logic +retry: + resp, err = cli.Do(req.request) + if err != nil { + return g.Err[*Response](err) + } + + // Check if retry is needed based on status code and retry configuration + if builder != nil && builder.retryMax != 0 && attempts < builder.retryMax && builder.retryCodes.NotEmpty() && + builder.retryCodes.Contains(resp.StatusCode) { + attempts++ + + time.Sleep(builder.retryWait) + goto retry + } + + // Check for write errors that occurred during request preparation + if req.werr != nil && *req.werr != nil { + return g.Err[*Response](*req.werr) + } + + response := &Response{ + Attempts: attempts, + Time: time.Since(start), + Client: req.cli, + ContentLength: resp.ContentLength, + Cookies: resp.Cookies(), + Headers: Headers(resp.Header), + Proto: g.String(resp.Proto), + StatusCode: StatusCode(resp.StatusCode), + URL: resp.Request.URL, + UserAgent: g.String(req.request.UserAgent()), + remoteAddr: req.remoteAddr, + request: req, + response: resp, + } + + if req.request.Method != http.MethodHead { + response.Body = new(Body) + response.Body.Reader = resp.Body + response.Body.cache = builder != nil && builder.cacheBody + response.Body.contentType = resp.Header.Get(header.CONTENT_TYPE) + response.Body.limit = -1 + } + + if err := req.cli.applyRespMW(response); err != nil { + return g.Err[*Response](err) + } + + return g.Ok(response) +} + +// WithContext associates a context with the request for cancellation and deadlines. +// The context can be used to cancel the request, set timeouts, or pass request-scoped values. +// Returns the request for method chaining. If ctx is nil, the request is unchanged. +func (req *Request) WithContext(ctx context.Context) *Request { + if ctx != nil { + req.request = req.request.WithContext(ctx) + } + + return req +} + +// AddCookies adds one or more HTTP cookies to the request. +// Cookies are added to the request headers and will be sent with the HTTP request. +// Returns the request for method chaining. +func (req *Request) AddCookies(cookies ...*http.Cookie) *Request { + for _, cookie := range cookies { + req.request.AddCookie(cookie) + } + + return req +} + +// SetHeaders sets HTTP headers for the request, replacing any existing headers with the same name. +// Supports multiple input formats: +// - Two arguments: key, value (string or g.String) +// - Single argument: http.Header, Headers, map types, or g.Map types +// Maintains header order for fingerprinting purposes when using g.MapOrd. +// Returns the request for method chaining. +func (req *Request) SetHeaders(headers ...any) *Request { + if req.request == nil || headers == nil { + return req + } + + req.applyHeaders(headers, func(h http.Header, k, v string) { h.Set(k, v) }) + + return req +} + +// AddHeaders adds HTTP headers to the request, appending to any existing headers with the same name. +// Unlike SetHeaders, this method preserves existing headers and adds new values. +// Supports the same input formats as SetHeaders. +// Returns the request for method chaining. +func (req *Request) AddHeaders(headers ...any) *Request { + if req.request == nil || headers == nil { + return req + } + + req.applyHeaders(headers, func(h http.Header, k, v string) { h.Add(k, v) }) + + return req +} + +// applyHeaders is a helper function that processes various header input formats and applies them to an HTTP request. +// It handles type checking, conversion, and delegation to the provided setOrAdd function for actual header manipulation. +// Supports ordered header maps for fingerprinting and maintains compatibility with multiple map and header types. +func (req *Request) applyHeaders( + rawHeaders []any, + setOrAdd func(h http.Header, key, value string), +) { + r := req.request + if len(rawHeaders) >= 2 { + var key, value string + + switch k := rawHeaders[0].(type) { + case string: + key = k + case g.String: + key = k.Std() + default: + panic(fmt.Sprintf("unsupported key type: expected 'string' or 'String', got %T", rawHeaders[0])) + } + + switch v := rawHeaders[1].(type) { + case string: + value = v + case g.String: + value = v.Std() + default: + panic(fmt.Sprintf("unsupported value type: expected 'string' or 'String', got %T", rawHeaders[1])) + } + + setOrAdd(r.Header, key, value) + return + } + + switch h := rawHeaders[0].(type) { + case http.Header: + for key, values := range h { + for _, value := range values { + setOrAdd(r.Header, key, value) + } + } + case Headers: + for key, values := range h { + for _, value := range values { + setOrAdd(r.Header, key, value) + } + } + case map[string]string: + for key, value := range h { + setOrAdd(r.Header, key, value) + } + case map[g.String]g.String: + for key, value := range h { + setOrAdd(r.Header, key.Std(), value.Std()) + } + case g.Map[string, string]: + for key, value := range h { + setOrAdd(r.Header, key, value) + } + case g.Map[g.String, g.String]: + for key, value := range h { + setOrAdd(r.Header, key.Std(), value.Std()) + } + case g.MapOrd[string, string]: + updated := updateRequestHeaderOrder(req, h) + updated.Iter().ForEach(func(key, value string) { setOrAdd(r.Header, key, value) }) + case g.MapOrd[g.String, g.String]: + updated := updateRequestHeaderOrder(req, h) + updated.Iter().ForEach(func(key, value g.String) { setOrAdd(r.Header, key.Std(), value.Std()) }) + default: + panic(fmt.Sprintf("unsupported headers type: expected 'http.Header', 'surf.Headers', 'map[~string]~string', 'Map[~string, ~string]', or 'MapOrd[~string, ~string]', got %T", rawHeaders[0])) + } +} + +// updateRequestHeaderOrder processes ordered headers for HTTP/2 and HTTP/3 fingerprinting. +// It maintains the specific order of headers which is crucial for browser fingerprinting. +// Separates regular headers from pseudo-headers (starting with ':') and sets the appropriate +// header order keys for the transport layer to use. Returns a filtered map containing only +// non-pseudo headers with non-empty values. +func updateRequestHeaderOrder[T ~string](r *Request, h g.MapOrd[T, T]) g.MapOrd[T, T] { + hclone := h.Clone() + + if r.cli.builder != nil { + switch r.cli.builder.browser { + case chromeBrowser: + chrome.Headers(&hclone, r.request.Method) + case firefoxBrowser: + firefox.Headers(&hclone, r.request.Method) + } + } + + headersKeys := g.TransformSlice(hclone.Iter(). + Keys(). + Map(func(s T) T { return T(g.String(s).Lower()) }). + Collect(), func(t T) string { return string(t) }) + + headers, pheaders := headersKeys.Iter().Partition(func(v string) bool { return v[0] != ':' }) + + if headers.NotEmpty() { + r.request.Header[http.HeaderOrderKey] = headers + } + + if pheaders.NotEmpty() { + r.request.Header[http.PHeaderOrderKey] = pheaders + } + + return hclone.Iter(). + Filter(func(header, data T) bool { return header[0] != ':' && len(data) != 0 }). + Collect() +} diff --git a/backend/vendor/github.com/enetx/surf/response.go b/backend/vendor/github.com/enetx/surf/response.go new file mode 100644 index 0000000..0f4e83b --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/response.go @@ -0,0 +1,68 @@ +package surf + +import ( + "net" + "net/url" + "time" + + "github.com/enetx/g" + "github.com/enetx/http" + "github.com/enetx/surf/header" +) + +// Response represents an HTTP response with enhanced functionality and metadata. +// It wraps the standard http.Response and provides additional features like timing information, +// retry attempts tracking, enhanced cookie management, and convenient access methods. +type Response struct { + *Client // Embedded client provides access to all client functionality + remoteAddr net.Addr // Remote server address captured during connection + URL *url.URL // Final URL after following redirects + response *http.Response // Underlying standard HTTP response + Body *Body // Enhanced response body with compression support and caching + request *Request // The original request that generated this response + Headers Headers // Response headers with convenience methods + UserAgent g.String // User agent that was used for the request + Proto g.String // HTTP protocol version (HTTP/1.1, HTTP/2, HTTP/3) + Cookies Cookies // Response cookies with enhanced functionality + Time time.Duration // Total request duration including retries + ContentLength int64 // Content-Length header value (-1 if not specified) + StatusCode StatusCode // HTTP status code with convenience methods + Attempts int // Number of retry attempts made for this request +} + +// GetResponse returns the underlying standard http.Response. +// Provides access to the wrapped HTTP response for advanced use cases. +func (resp Response) GetResponse() *http.Response { return resp.response } + +// Referer returns the HTTP Referer header value from the original request. +// This indicates which page linked to the resource being requested. +func (resp Response) Referer() g.String { return g.String(resp.response.Request.Referer()) } + +// Location returns the HTTP Location header value, typically used in redirects. +// Contains the URL that the client should redirect to for 3xx status codes. +func (resp Response) Location() g.String { return resp.Headers.Get(header.LOCATION) } + +// GetCookies returns all cookies from the response that would be sent to the specified URL. +// Filters cookies based on domain, path, and security attributes. +func (resp Response) GetCookies(rawURL g.String) []*http.Cookie { return resp.getCookies(rawURL) } + +// RemoteAddress returns the network address of the server that sent this response. +// Useful for logging, debugging, or connection analysis. +func (resp Response) RemoteAddress() net.Addr { return resp.remoteAddr } + +// SetCookies stores cookies in the client's cookie jar for the specified URL. +// This allows the cookies to be automatically sent with future requests to matching URLs. +func (resp *Response) SetCookies(rawURL g.String, cookies []*http.Cookie) error { + return resp.setCookies(rawURL, cookies) +} + +// TLSGrabber extracts TLS connection information from the response. +// Returns detailed TLS connection data including certificates, cipher suites, and protocol version +// if the response was received over a TLS connection. Returns nil for non-TLS connections. +func (resp Response) TLSGrabber() *TLSData { + if resp.response.TLS != nil { + return tlsGrabber(resp.response.TLS) + } + + return nil +} diff --git a/backend/vendor/github.com/enetx/surf/status.go b/backend/vendor/github.com/enetx/surf/status.go new file mode 100644 index 0000000..867cc9c --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/status.go @@ -0,0 +1,25 @@ +package surf + +import "net/http" + +// StatusCode represents an HTTP status code with convenient classification methods. +// Extends the basic integer status code with methods to easily identify the response category. +type StatusCode int + +// IsInformational returns true if the status code is in the informational range [100, 200]. +func (s StatusCode) IsInformational() bool { return s >= 100 && s < 200 } + +// IsSuccess returns true if the status code indicates a successful response [200, 300]. +func (s StatusCode) IsSuccess() bool { return s >= 200 && s < 300 } + +// IsRedirection returns true if the status code indicates a redirection [300, 400]. +func (s StatusCode) IsRedirection() bool { return s >= 300 && s < 400 } + +// IsClientError returns true if the status code indicates a client error [400, 500]. +func (s StatusCode) IsClientError() bool { return s >= 400 && s < 500 } + +// IsServerError returns true if the status code indicates a server error [500, ∞]. +func (s StatusCode) IsServerError() bool { return s >= 500 } + +// Text returns the textual representation of the status code. +func (s StatusCode) Text() string { return http.StatusText(int(s)) } diff --git a/backend/vendor/github.com/enetx/surf/tls.go b/backend/vendor/github.com/enetx/surf/tls.go new file mode 100644 index 0000000..74912b2 --- /dev/null +++ b/backend/vendor/github.com/enetx/surf/tls.go @@ -0,0 +1,90 @@ +package surf + +import ( + "bytes" + "crypto/sha256" + "crypto/tls" + "encoding/hex" + "errors" + "fmt" +) + +// TLSData represents information about a TLS certificate. +type TLSData struct { + ExtensionServerName string // Server name extension of the TLS certificate. + FingerprintSHA256 string // SHA-256 fingerprint of the certificate. + FingerprintSHA256OpenSSL string // SHA-256 fingerprint compatible with OpenSSL. + TLSVersion string // TLS version used. + CommonName []string // List of common names associated with the certificate. + DNSNames []string // List of DNS names associated with the certificate. + Emails []string // List of email addresses associated with the certificate. + IssuerCommonName []string // List of common names of the certificate issuer. + IssuerOrg []string // List of organizations of the certificate issuer. + Organization []string // List of organizations associated with the certificate. +} + +// tlsGrabber takes a TLS connection state and returns a tlsData struct containing information +// about the TLS connection. +func tlsGrabber(cs *tls.ConnectionState) *TLSData { + var td TLSData + + if cs != nil { + cert := cs.PeerCertificates[0] + td.DNSNames = append(td.DNSNames, cert.DNSNames...) + td.Emails = append(td.Emails, cert.EmailAddresses...) + td.CommonName = append(td.CommonName, cert.Subject.CommonName) + td.Organization = append(td.Organization, cert.Subject.Organization...) + td.IssuerOrg = append(td.IssuerOrg, cert.Issuer.Organization...) + td.IssuerCommonName = append(td.IssuerCommonName, cert.Issuer.CommonName) + td.ExtensionServerName = cs.ServerName + + tlsVersionStringMap := map[uint16]string{ + 0x0300: "SSL30", + 0x0301: "TLS10", + 0x0302: "TLS11", + 0x0303: "TLS12", + 0x0304: "TLS13", + } + + if version, ok := tlsVersionStringMap[cs.Version]; ok { + td.TLSVersion = version + } + + if fingerprintSHA256, err := calculateFingerprints(cs); err == nil { + td.FingerprintSHA256 = hex.EncodeToString(fingerprintSHA256) + td.FingerprintSHA256OpenSSL = openSSL(fingerprintSHA256) + } + } + + return &td +} + +// calculateFingerprints takes a TLS connection state and returns the SHA256 fingerprint +// of the first certificate in the chain or an error if no certificates are found. +func calculateFingerprints(c *tls.ConnectionState) ([]byte, error) { + if len(c.PeerCertificates) == 0 { + err := errors.New("no certificates found") + return nil, err + } + + cert := c.PeerCertificates[0] + dataSHA256 := sha256.Sum256(cert.Raw) + fingerprintSHA256 := dataSHA256[:] + + return fingerprintSHA256, nil +} + +// openSSL takes a byte slice of a fingerprint and returns a string representation in the OpenSSL +// format. +func openSSL(fpBytes []byte) string { + var buf bytes.Buffer + + for i, f := range fpBytes { + if i > 0 { + _, _ = fmt.Fprintf(&buf, ":") + } + _, _ = fmt.Fprintf(&buf, "%02X", f) + } + + return buf.String() +} diff --git a/backend/vendor/github.com/enetx/uquic/.gitignore b/backend/vendor/github.com/enetx/uquic/.gitignore new file mode 100644 index 0000000..3cc06f2 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/.gitignore @@ -0,0 +1,17 @@ +debug +debug.test +main +mockgen_tmp.go +*.qtr +*.qlog +*.txt +race.[0-9]* + +fuzzing/*/*.zip +fuzzing/*/coverprofile +fuzzing/*/crashers +fuzzing/*/sonarprofile +fuzzing/*/suppressions +fuzzing/*/corpus/ + +gomock_reflect_*/ diff --git a/backend/vendor/github.com/enetx/uquic/.golangci.yml b/backend/vendor/github.com/enetx/uquic/.golangci.yml new file mode 100644 index 0000000..469d54c --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/.golangci.yml @@ -0,0 +1,33 @@ +run: + skip-files: + - internal/handshake/cipher_suite.go +linters-settings: + misspell: + ignore-words: + - ect + +linters: + disable-all: true + enable: + - asciicheck + - exhaustive + - exportloopref + - goimports + - gofmt # redundant, since gofmt *should* be a no-op after gofumpt + - gofumpt + - gosimple + - ineffassign + - misspell + - prealloc + - staticcheck + - stylecheck + - unconvert + - unparam + - unused + - vet + +issues: + exclude-rules: + - path: internal/qtls + linters: + - depguard diff --git a/backend/vendor/github.com/enetx/uquic/Changelog.md b/backend/vendor/github.com/enetx/uquic/Changelog.md new file mode 100644 index 0000000..3577ab6 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/Changelog.md @@ -0,0 +1,5 @@ +# Changelog + +## v0.37.1 (2023-08-03) + +- Detached from quic-go/quic-go v0.37.1. \ No newline at end of file diff --git a/backend/vendor/github.com/enetx/uquic/LICENSE b/backend/vendor/github.com/enetx/uquic/LICENSE new file mode 100644 index 0000000..51378be --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2016 the quic-go authors & Google, Inc. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/backend/vendor/github.com/enetx/uquic/README.md b/backend/vendor/github.com/enetx/uquic/README.md new file mode 100644 index 0000000..17b451d --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/README.md @@ -0,0 +1,112 @@ +#
drawing uQUIC
+ +[![Go Build Status](https://github.com/enetx/uquic/actions/workflows/go_build.yml/badge.svg?branch=master)](https://github.com/enetx/uquic/actions/workflows/go_build.yml) +[![Ginkgo Test Status](https://github.com/enetx/uquic/actions/workflows/ginkgo_test.yml/badge.svg?branch=master)](https://github.com/enetx/uquic/actions/workflows/ginkgo_test.yml) +[![godoc](https://img.shields.io/badge/godoc-reference-blue.svg)](https://godoc.org/github.com/enetx/uquic) +--- +uQUIC is a fork of [quic-go](https://github.com/quic-go/quic-go), which provides Initial Packet fingerprinting resistance and other features. While the handshake is still performed by quic-go, this library provides interface to customize the unencrypted Initial Packet which may reveal fingerprint-able information. + +Golang 1.20+ is required. + +If you have any questions, bug reports or contributions, you are welcome to publish those on GitHub. You may also reach out to one of the maintainers via gaukas.wang@colorado.edu. + +Development is still in progress and we welcome any contributions adding new features or fixing extant bugs. + +# Disclaimer +This repository belongs to a large research project on how to fingerprint QUIC clients and how to mitigate such fingerprinting. We do not encourage any malicious use of this project's output, including this repository, [uTLS](https://github.com/enetx/utls), and [clienthellod](https://github.com/gaukas/clienthellod). + +Our research paper is still yet to be published and therefore this repository is neither ready for production use nor peer-reviewed. And the scope of our research is limited that such mimicry backed by this library MAY NOT be realisticly indistinguishable from the real QUIC clients being mimicked, and some misuses of this library MAY lead to easier fingerprinting against the mimic. We welcome any contributions to improve the realism of the mimicry, as well as expanding the scope of this project. + +For anyone intending to use this library for censorship circumvention, please be sure to understand the risks and limitations of this library. + +If you are interested in our research, please stay tuned for our paper. + +# Development in Progress +## Development Roadmap +- [ ] Customize Initial Packet + - [x] QUIC Header + - [x] QUIC Frame (~~[#3](https://github.com/enetx/uquic/issues/3)~~) + - [x] QUIC Crypto Frame + - [x] QUIC Padding Frame + - [x] QUIC Ping Frame + - [ ] QUIC ACK Frame (on hold) + - [x] TLS ClientHello Message (by [uTLS](https://github.com/enetx/utls)) + - [x] QUIC Transport Parameters (in a uTLS extension) +- [ ] Customize Initial ACK behavior ([#1](https://github.com/enetx/uquic/issues/1), [quic-go#4007](https://github.com/quic-go/quic-go/issues/4007)) +- [ ] Customize Initial Retry behavior ([#2](https://github.com/enetx/uquic/issues/2)) +- [ ] Add preset QUIC parrots + - [x] Google Chrome parrot (call for parrots w/ `Token/PSK`) + - [x] Mozilla Firefox parrot (call for parrots w/ `Token/PSK`) + - [ ] Apple Safari parrot + - [ ] Microsoft Edge parrot + +# Features +## Initial Packet fingerprinting resistance +uQUIC provides a mechanism to customize the Initial Packet, which is unencrypted and is almost unique to every QUIC client implementation. We provide an interface to customize the Initial Packet and makes the fingerprinting of QUIC clients harder. + +### Build a QUIC Spec +A QUIC Spec sets parameters and policies for uQUIC in establishing a QUIC connection. + +See `u_parrot.go` for examples of building a QUIC Spec (parrot). + +### Use a preset QUIC Spec +We provide a few preset QUIC Specs (parrots) for popular QUIC clients in `u_parrot.go`. + +To use one, simple invoke `QUICID2Spec(id)`. See below for a complete example of using a preset QUIC Spec in an HTTP3 client. + +```go +package main + +import ( + "bytes" + "fmt" + "io" + "log" + "net/http" + + tls "github.com/enetx/utls" + + quic "github.com/enetx/uquic" + "github.com/enetx/uquic/http3" +) + +func main() { + roundTripper := &http3.RoundTripper{ + TLSClientConfig: &tls.Config{}, + QuicConfig: &quic.Config{}, + } + + quicSpec, err := quic.QUICID2Spec(quic.QUICFirefox_116) + // quicSpec, err := quic.QUICID2Spec(quic.QUICChrome_115) + if err != nil { + log.Fatal(err) + } + + uRoundTripper := http3.GetURoundTripper( + roundTripper, + &quicSpec, + // getCRQUICSpec(), + nil, + ) + defer uRoundTripper.Close() + + h3client := &http.Client{ + Transport: uRoundTripper, + } + + addr := "https://quic.tlsfingerprint.io/qfp/?beautify=true" + + rsp, err := h3client.Get(addr) + if err != nil { + log.Fatal(err) + } + fmt.Printf("Got response for %s: %#v", addr, rsp) + + body := &bytes.Buffer{} + _, err = io.Copy(body, rsp.Body) + if err != nil { + log.Fatal(err) + } + fmt.Printf("Response Body: %s", body.Bytes()) +} +``` diff --git a/backend/vendor/github.com/enetx/uquic/SECURITY.md b/backend/vendor/github.com/enetx/uquic/SECURITY.md new file mode 100644 index 0000000..44c3d6f --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/SECURITY.md @@ -0,0 +1,20 @@ +# Security Policy + +quic-go still in development. This means that there may be problems in our protocols, +or there may be mistakes in our implementations. +We take security vulnerabilities very seriously. If you discover a security issue, +please bring it to our attention right away! + +## Reporting a Vulnerability + +If you find a vulnerability that may affect live deployments -- for example, by exposing +a remote execution exploit -- please report privately to us by emailing one of the maintainers you can find in README.md. + +In case the vulnerability is with the upstream [quic-go](https://github.com/quic-go/quic-go) (which is likely the case), please report it directly to them privately [here](https://github.com/quic-go/quic-go/security/advisories/new). + +If the issue is an implementation weakness that cannot be immediately exploited or +something not yet deployed, just discuss it openly. + +## Reporting a non security bug + +For non-security bugs, please simply file a GitHub [issue](https://github.com/enetx/uquic/issues/new). diff --git a/backend/vendor/github.com/enetx/uquic/buffer_pool.go b/backend/vendor/github.com/enetx/uquic/buffer_pool.go new file mode 100644 index 0000000..04c8e38 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/buffer_pool.go @@ -0,0 +1,92 @@ +package quic + +import ( + "sync" + + "github.com/enetx/uquic/internal/protocol" +) + +type packetBuffer struct { + Data []byte + + // refCount counts how many packets Data is used in. + // It doesn't support concurrent use. + // It is > 1 when used for coalesced packet. + refCount int +} + +// Split increases the refCount. +// It must be called when a packet buffer is used for more than one packet, +// e.g. when splitting coalesced packets. +func (b *packetBuffer) Split() { + b.refCount++ +} + +// Decrement decrements the reference counter. +// It doesn't put the buffer back into the pool. +func (b *packetBuffer) Decrement() { + b.refCount-- + if b.refCount < 0 { + panic("negative packetBuffer refCount") + } +} + +// MaybeRelease puts the packet buffer back into the pool, +// if the reference counter already reached 0. +func (b *packetBuffer) MaybeRelease() { + // only put the packetBuffer back if it's not used any more + if b.refCount == 0 { + b.putBack() + } +} + +// Release puts back the packet buffer into the pool. +// It should be called when processing is definitely finished. +func (b *packetBuffer) Release() { + b.Decrement() + if b.refCount != 0 { + panic("packetBuffer refCount not zero") + } + b.putBack() +} + +// Len returns the length of Data +func (b *packetBuffer) Len() protocol.ByteCount { return protocol.ByteCount(len(b.Data)) } +func (b *packetBuffer) Cap() protocol.ByteCount { return protocol.ByteCount(cap(b.Data)) } + +func (b *packetBuffer) putBack() { + if cap(b.Data) == protocol.MaxPacketBufferSize { + bufferPool.Put(b) + return + } + if cap(b.Data) == protocol.MaxLargePacketBufferSize { + largeBufferPool.Put(b) + return + } + panic("putPacketBuffer called with packet of wrong size!") +} + +var bufferPool, largeBufferPool sync.Pool + +func getPacketBuffer() *packetBuffer { + buf := bufferPool.Get().(*packetBuffer) + buf.refCount = 1 + buf.Data = buf.Data[:0] + return buf +} + +func getLargePacketBuffer() *packetBuffer { + buf := largeBufferPool.Get().(*packetBuffer) + buf.refCount = 1 + buf.Data = buf.Data[:0] + return buf +} + +func init() { + bufferPool.New = func() any { + return &packetBuffer{Data: make([]byte, 0, protocol.MaxPacketBufferSize)} + } + largeBufferPool.New = func() any { + return &packetBuffer{Data: make([]byte, 0, protocol.MaxLargePacketBufferSize)} + } +} diff --git a/backend/vendor/github.com/enetx/uquic/client.go b/backend/vendor/github.com/enetx/uquic/client.go new file mode 100644 index 0000000..c57ee6d --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/client.go @@ -0,0 +1,256 @@ +package quic + +import ( + "context" + "errors" + "net" + + tls "github.com/enetx/utls" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/logging" +) + +type client struct { + sendConn sendConn + + use0RTT bool + + packetHandlers packetHandlerManager + onClose func() + + tlsConf *tls.Config + config *Config + + connIDGenerator ConnectionIDGenerator + srcConnID protocol.ConnectionID + destConnID protocol.ConnectionID + + initialPacketNumber protocol.PacketNumber + hasNegotiatedVersion bool + version protocol.Version + + handshakeChan chan struct{} + + conn quicConn + + tracer *logging.ConnectionTracer + tracingID uint64 + logger utils.Logger +} + +// make it possible to mock connection ID for initial generation in the tests +var generateConnectionIDForInitial = protocol.GenerateConnectionIDForInitial +var generateConnectionIDForInitialWithLength = protocol.GenerateConnectionIDForInitialWithLen + +// DialAddr establishes a new QUIC connection to a server. +// It resolves the address, and then creates a new UDP connection to dial the QUIC server. +// When the QUIC connection is closed, this UDP connection is closed. +// See Dial for more details. +func DialAddr(ctx context.Context, addr string, tlsConf *tls.Config, conf *Config) (Connection, error) { + udpConn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4zero, Port: 0}) + if err != nil { + return nil, err + } + udpAddr, err := net.ResolveUDPAddr("udp", addr) + if err != nil { + return nil, err + } + tr, err := setupTransport(udpConn, tlsConf, true) + if err != nil { + return nil, err + } + return tr.dial(ctx, udpAddr, addr, tlsConf, conf, false) +} + +// DialAddrEarly establishes a new 0-RTT QUIC connection to a server. +// See DialAddr for more details. +func DialAddrEarly(ctx context.Context, addr string, tlsConf *tls.Config, conf *Config) (EarlyConnection, error) { + udpConn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4zero, Port: 0}) + if err != nil { + return nil, err + } + udpAddr, err := net.ResolveUDPAddr("udp", addr) + if err != nil { + return nil, err + } + tr, err := setupTransport(udpConn, tlsConf, true) + if err != nil { + return nil, err + } + conn, err := tr.dial(ctx, udpAddr, addr, tlsConf, conf, true) + if err != nil { + tr.Close() + return nil, err + } + return conn, nil +} + +// DialEarly establishes a new 0-RTT QUIC connection to a server using a net.PacketConn. +// See Dial for more details. +func DialEarly(ctx context.Context, c net.PacketConn, addr net.Addr, tlsConf *tls.Config, conf *Config) (EarlyConnection, error) { + dl, err := setupTransport(c, tlsConf, false) + if err != nil { + return nil, err + } + conn, err := dl.DialEarly(ctx, addr, tlsConf, conf) + if err != nil { + dl.Close() + return nil, err + } + return conn, nil +} + +// Dial establishes a new QUIC connection to a server using a net.PacketConn. +// If the PacketConn satisfies the OOBCapablePacketConn interface (as a net.UDPConn does), +// ECN and packet info support will be enabled. In this case, ReadMsgUDP and WriteMsgUDP +// will be used instead of ReadFrom and WriteTo to read/write packets. +// The tls.Config must define an application protocol (using NextProtos). +// +// This is a convenience function. More advanced use cases should instantiate a Transport, +// which offers configuration options for a more fine-grained control of the connection establishment, +// including reusing the underlying UDP socket for multiple QUIC connections. +func Dial(ctx context.Context, c net.PacketConn, addr net.Addr, tlsConf *tls.Config, conf *Config) (Connection, error) { + dl, err := setupTransport(c, tlsConf, false) + if err != nil { + return nil, err + } + conn, err := dl.Dial(ctx, addr, tlsConf, conf) + if err != nil { + dl.Close() + return nil, err + } + return conn, nil +} + +func setupTransport(c net.PacketConn, tlsConf *tls.Config, createdPacketConn bool) (*Transport, error) { + if tlsConf == nil { + return nil, errors.New("quic: tls.Config not set") + } + return &Transport{ + Conn: c, + createdConn: createdPacketConn, + isSingleUse: true, + }, nil +} + +func dial( + ctx context.Context, + conn sendConn, + connIDGenerator ConnectionIDGenerator, + packetHandlers packetHandlerManager, + tlsConf *tls.Config, + config *Config, + onClose func(), + use0RTT bool, +) (quicConn, error) { + c, err := newClient(conn, connIDGenerator, config, tlsConf, onClose, use0RTT) + if err != nil { + return nil, err + } + c.packetHandlers = packetHandlers + + c.tracingID = nextConnTracingID() + if c.config.Tracer != nil { + c.tracer = c.config.Tracer(context.WithValue(ctx, ConnectionTracingKey, c.tracingID), protocol.PerspectiveClient, c.destConnID) + } + if c.tracer != nil && c.tracer.StartedConnection != nil { + c.tracer.StartedConnection(c.sendConn.LocalAddr(), c.sendConn.RemoteAddr(), c.srcConnID, c.destConnID) + } + + if err := c.dial(ctx); err != nil { + return nil, err + } + return c.conn, nil +} + +func newClient(sendConn sendConn, connIDGenerator ConnectionIDGenerator, config *Config, tlsConf *tls.Config, onClose func(), use0RTT bool) (*client, error) { + srcConnID, err := connIDGenerator.GenerateConnectionID() + if err != nil { + return nil, err + } + + destConnID, err := generateConnectionIDForInitial() + if err != nil { + return nil, err + } + c := &client{ + connIDGenerator: connIDGenerator, + srcConnID: srcConnID, + destConnID: destConnID, + sendConn: sendConn, + use0RTT: use0RTT, + onClose: onClose, + tlsConf: tlsConf, + config: config, + version: config.Versions[0], + handshakeChan: make(chan struct{}), + logger: utils.DefaultLogger.WithPrefix("client"), + } + return c, nil +} + +func (c *client) dial(ctx context.Context) error { + c.logger.Infof("Starting new connection to %s (%s -> %s), source connection ID %s, destination connection ID %s, version %s", c.tlsConf.ServerName, c.sendConn.LocalAddr(), c.sendConn.RemoteAddr(), c.srcConnID, c.destConnID, c.version) + + c.conn = newClientConnection( + c.sendConn, + c.packetHandlers, + c.destConnID, + c.srcConnID, + c.connIDGenerator, + c.config, + c.tlsConf, + c.initialPacketNumber, + c.use0RTT, + c.hasNegotiatedVersion, + c.tracer, + c.tracingID, + c.logger, + c.version, + ) + + c.packetHandlers.Add(c.srcConnID, c.conn) + + errorChan := make(chan error, 1) + recreateChan := make(chan errCloseForRecreating) + go func() { + err := c.conn.run() + var recreateErr *errCloseForRecreating + if errors.As(err, &recreateErr) { + recreateChan <- *recreateErr + return + } + if c.onClose != nil { + c.onClose() + } + errorChan <- err // returns as soon as the connection is closed + }() + + // only set when we're using 0-RTT + // Otherwise, earlyConnChan will be nil. Receiving from a nil chan blocks forever. + var earlyConnChan <-chan struct{} + if c.use0RTT { + earlyConnChan = c.conn.earlyConnReady() + } + + select { + case <-ctx.Done(): + c.conn.destroy(nil) + return context.Cause(ctx) + case err := <-errorChan: + return err + case recreateErr := <-recreateChan: + c.initialPacketNumber = recreateErr.nextPacketNumber + c.version = recreateErr.nextVersion + c.hasNegotiatedVersion = true + return c.dial(ctx) + case <-earlyConnChan: + // ready to send 0-RTT data + return nil + case <-c.conn.HandshakeComplete(): + // handshake successfully completed + return nil + } +} diff --git a/backend/vendor/github.com/enetx/uquic/closed_conn.go b/backend/vendor/github.com/enetx/uquic/closed_conn.go new file mode 100644 index 0000000..b5f5e94 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/closed_conn.go @@ -0,0 +1,57 @@ +package quic + +import ( + "math/bits" + "net" + + "github.com/enetx/uquic/internal/utils" +) + +// A closedLocalConn is a connection that we closed locally. +// When receiving packets for such a connection, we need to retransmit the packet containing the CONNECTION_CLOSE frame, +// with an exponential backoff. +type closedLocalConn struct { + counter uint32 + logger utils.Logger + + sendPacket func(net.Addr, packetInfo) +} + +var _ packetHandler = &closedLocalConn{} + +// newClosedLocalConn creates a new closedLocalConn and runs it. +func newClosedLocalConn(sendPacket func(net.Addr, packetInfo), logger utils.Logger) packetHandler { + return &closedLocalConn{ + sendPacket: sendPacket, + logger: logger, + } +} + +func (c *closedLocalConn) handlePacket(p receivedPacket) { + c.counter++ + // exponential backoff + // only send a CONNECTION_CLOSE for the 1st, 2nd, 4th, 8th, 16th, ... packet arriving + if bits.OnesCount32(c.counter) != 1 { + return + } + c.logger.Debugf("Received %d packets after sending CONNECTION_CLOSE. Retransmitting.", c.counter) + c.sendPacket(p.remoteAddr, p.info) +} + +func (c *closedLocalConn) destroy(error) {} +func (c *closedLocalConn) closeWithTransportError(TransportErrorCode) {} + +// A closedRemoteConn is a connection that was closed remotely. +// For such a connection, we might receive reordered packets that were sent before the CONNECTION_CLOSE. +// We can just ignore those packets. +type closedRemoteConn struct{} + +var _ packetHandler = &closedRemoteConn{} + +func newClosedRemoteConn() packetHandler { + return &closedRemoteConn{} +} + +func (c *closedRemoteConn) handlePacket(receivedPacket) {} +func (c *closedRemoteConn) destroy(error) {} +func (c *closedRemoteConn) closeWithTransportError(TransportErrorCode) {} diff --git a/backend/vendor/github.com/enetx/uquic/codecov.yml b/backend/vendor/github.com/enetx/uquic/codecov.yml new file mode 100644 index 0000000..59e4b58 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/codecov.yml @@ -0,0 +1,16 @@ +coverage: + round: nearest + ignore: + - http3/gzip_reader.go + - interop/ + - internal/handshake/cipher_suite.go + - internal/utils/linkedlist/linkedlist.go + - internal/testdata + - testutils/ + - fuzzing/ + - metrics/ + status: + project: + default: + threshold: 0.5 + patch: false diff --git a/backend/vendor/github.com/enetx/uquic/config.go b/backend/vendor/github.com/enetx/uquic/config.go new file mode 100644 index 0000000..ba2ae39 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/config.go @@ -0,0 +1,130 @@ +package quic + +import ( + "fmt" + "time" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/quicvarint" +) + +// Clone clones a Config +func (c *Config) Clone() *Config { + copy := *c + return © +} + +func (c *Config) handshakeTimeout() time.Duration { + return 2 * c.HandshakeIdleTimeout +} + +func (c *Config) maxRetryTokenAge() time.Duration { + return c.handshakeTimeout() +} + +func validateConfig(config *Config) error { + if config == nil { + return nil + } + const maxStreams = 1 << 60 + if config.MaxIncomingStreams > maxStreams { + config.MaxIncomingStreams = maxStreams + } + if config.MaxIncomingUniStreams > maxStreams { + config.MaxIncomingUniStreams = maxStreams + } + if config.MaxStreamReceiveWindow > quicvarint.Max { + config.MaxStreamReceiveWindow = quicvarint.Max + } + if config.MaxConnectionReceiveWindow > quicvarint.Max { + config.MaxConnectionReceiveWindow = quicvarint.Max + } + // check that all QUIC versions are actually supported + for _, v := range config.Versions { + if !protocol.IsValidVersion(v) { + return fmt.Errorf("invalid QUIC version: %s", v) + } + } + return nil +} + +// populateConfig populates fields in the quic.Config with their default values, if none are set +// it may be called with nil +func populateConfig(config *Config) *Config { + if config == nil { + config = &Config{} + } + versions := config.Versions + if len(versions) == 0 { + versions = protocol.SupportedVersions + } + handshakeIdleTimeout := protocol.DefaultHandshakeIdleTimeout + if config.HandshakeIdleTimeout != 0 { + handshakeIdleTimeout = config.HandshakeIdleTimeout + } + idleTimeout := protocol.DefaultIdleTimeout + if config.MaxIdleTimeout != 0 { + idleTimeout = config.MaxIdleTimeout + } + initialStreamReceiveWindow := config.InitialStreamReceiveWindow + if initialStreamReceiveWindow == 0 { + initialStreamReceiveWindow = protocol.DefaultInitialMaxStreamData + } + maxStreamReceiveWindow := config.MaxStreamReceiveWindow + if maxStreamReceiveWindow == 0 { + maxStreamReceiveWindow = protocol.DefaultMaxReceiveStreamFlowControlWindow + } + initialConnectionReceiveWindow := config.InitialConnectionReceiveWindow + if initialConnectionReceiveWindow == 0 { + initialConnectionReceiveWindow = protocol.DefaultInitialMaxData + } + maxConnectionReceiveWindow := config.MaxConnectionReceiveWindow + if maxConnectionReceiveWindow == 0 { + maxConnectionReceiveWindow = protocol.DefaultMaxReceiveConnectionFlowControlWindow + } + maxIncomingStreams := config.MaxIncomingStreams + if maxIncomingStreams == 0 { + maxIncomingStreams = protocol.DefaultMaxIncomingStreams + } else if maxIncomingStreams < 0 { + maxIncomingStreams = 0 + } + maxIncomingUniStreams := config.MaxIncomingUniStreams + if maxIncomingUniStreams == 0 { + maxIncomingUniStreams = protocol.DefaultMaxIncomingUniStreams + } else if maxIncomingUniStreams < 0 { + maxIncomingUniStreams = 0 + } + + return &Config{ + GetConfigForClient: config.GetConfigForClient, + Versions: versions, + HandshakeIdleTimeout: handshakeIdleTimeout, + MaxIdleTimeout: idleTimeout, + KeepAlivePeriod: config.KeepAlivePeriod, + InitialStreamReceiveWindow: initialStreamReceiveWindow, + MaxStreamReceiveWindow: maxStreamReceiveWindow, + InitialConnectionReceiveWindow: initialConnectionReceiveWindow, + MaxConnectionReceiveWindow: maxConnectionReceiveWindow, + AllowConnectionWindowIncrease: config.AllowConnectionWindowIncrease, + MaxIncomingStreams: maxIncomingStreams, + MaxIncomingUniStreams: maxIncomingUniStreams, + TokenStore: config.TokenStore, + EnableDatagrams: config.EnableDatagrams, + DisablePathMTUDiscovery: config.DisablePathMTUDiscovery, + Allow0RTT: config.Allow0RTT, + Tracer: config.Tracer, + } +} + +type PacketNumberLen = protocol.PacketNumberLen + +const ( + // PacketNumberLen1 is a packet number length of 1 byte + PacketNumberLen1 PacketNumberLen = 1 + // PacketNumberLen2 is a packet number length of 2 bytes + PacketNumberLen2 PacketNumberLen = 2 + // PacketNumberLen3 is a packet number length of 3 bytes + PacketNumberLen3 PacketNumberLen = 3 + // PacketNumberLen4 is a packet number length of 4 bytes + PacketNumberLen4 PacketNumberLen = 4 +) diff --git a/backend/vendor/github.com/enetx/uquic/conn_id_generator.go b/backend/vendor/github.com/enetx/uquic/conn_id_generator.go new file mode 100644 index 0000000..134fd66 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/conn_id_generator.go @@ -0,0 +1,138 @@ +package quic + +import ( + "fmt" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/wire" +) + +type connIDGenerator struct { + generator ConnectionIDGenerator + highestSeq uint64 + + activeSrcConnIDs map[uint64]protocol.ConnectionID + initialClientDestConnID *protocol.ConnectionID // nil for the client + + addConnectionID func(protocol.ConnectionID) + getStatelessResetToken func(protocol.ConnectionID) protocol.StatelessResetToken + removeConnectionID func(protocol.ConnectionID) + retireConnectionID func(protocol.ConnectionID) + replaceWithClosed func([]protocol.ConnectionID, []byte) + queueControlFrame func(wire.Frame) +} + +func newConnIDGenerator( + initialConnectionID protocol.ConnectionID, + initialClientDestConnID *protocol.ConnectionID, // nil for the client + addConnectionID func(protocol.ConnectionID), + getStatelessResetToken func(protocol.ConnectionID) protocol.StatelessResetToken, + removeConnectionID func(protocol.ConnectionID), + retireConnectionID func(protocol.ConnectionID), + replaceWithClosed func([]protocol.ConnectionID, []byte), + queueControlFrame func(wire.Frame), + generator ConnectionIDGenerator, +) *connIDGenerator { + m := &connIDGenerator{ + generator: generator, + activeSrcConnIDs: make(map[uint64]protocol.ConnectionID), + addConnectionID: addConnectionID, + getStatelessResetToken: getStatelessResetToken, + removeConnectionID: removeConnectionID, + retireConnectionID: retireConnectionID, + replaceWithClosed: replaceWithClosed, + queueControlFrame: queueControlFrame, + } + m.activeSrcConnIDs[0] = initialConnectionID + m.initialClientDestConnID = initialClientDestConnID + return m +} + +func (m *connIDGenerator) SetMaxActiveConnIDs(limit uint64) error { + if m.generator.ConnectionIDLen() == 0 { + return nil + } + // The active_connection_id_limit transport parameter is the number of + // connection IDs the peer will store. This limit includes the connection ID + // used during the handshake, and the one sent in the preferred_address + // transport parameter. + // We currently don't send the preferred_address transport parameter, + // so we can issue (limit - 1) connection IDs. + for i := uint64(len(m.activeSrcConnIDs)); i < min(limit, protocol.MaxIssuedConnectionIDs); i++ { + if err := m.issueNewConnID(); err != nil { + return err + } + } + return nil +} + +func (m *connIDGenerator) Retire(seq uint64, sentWithDestConnID protocol.ConnectionID) error { + if seq > m.highestSeq { + return &qerr.TransportError{ + ErrorCode: qerr.ProtocolViolation, + ErrorMessage: fmt.Sprintf("retired connection ID %d (highest issued: %d)", seq, m.highestSeq), + } + } + connID, ok := m.activeSrcConnIDs[seq] + // We might already have deleted this connection ID, if this is a duplicate frame. + if !ok { + return nil + } + if connID == sentWithDestConnID { + return &qerr.TransportError{ + ErrorCode: qerr.ProtocolViolation, + ErrorMessage: fmt.Sprintf("retired connection ID %d (%s), which was used as the Destination Connection ID on this packet", seq, connID), + } + } + m.retireConnectionID(connID) + delete(m.activeSrcConnIDs, seq) + // Don't issue a replacement for the initial connection ID. + if seq == 0 { + return nil + } + return m.issueNewConnID() +} + +func (m *connIDGenerator) issueNewConnID() error { + connID, err := m.generator.GenerateConnectionID() + if err != nil { + return err + } + m.activeSrcConnIDs[m.highestSeq+1] = connID + m.addConnectionID(connID) + m.queueControlFrame(&wire.NewConnectionIDFrame{ + SequenceNumber: m.highestSeq + 1, + ConnectionID: connID, + StatelessResetToken: m.getStatelessResetToken(connID), + }) + m.highestSeq++ + return nil +} + +func (m *connIDGenerator) SetHandshakeComplete() { + if m.initialClientDestConnID != nil { + m.retireConnectionID(*m.initialClientDestConnID) + m.initialClientDestConnID = nil + } +} + +func (m *connIDGenerator) RemoveAll() { + if m.initialClientDestConnID != nil { + m.removeConnectionID(*m.initialClientDestConnID) + } + for _, connID := range m.activeSrcConnIDs { + m.removeConnectionID(connID) + } +} + +func (m *connIDGenerator) ReplaceWithClosed(connClose []byte) { + connIDs := make([]protocol.ConnectionID, 0, len(m.activeSrcConnIDs)+1) + if m.initialClientDestConnID != nil { + connIDs = append(connIDs, *m.initialClientDestConnID) + } + for _, connID := range m.activeSrcConnIDs { + connIDs = append(connIDs, connID) + } + m.replaceWithClosed(connIDs, connClose) +} diff --git a/backend/vendor/github.com/enetx/uquic/conn_id_manager.go b/backend/vendor/github.com/enetx/uquic/conn_id_manager.go new file mode 100644 index 0000000..0f7c497 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/conn_id_manager.go @@ -0,0 +1,224 @@ +package quic + +import ( + "fmt" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/utils" + list "github.com/enetx/uquic/internal/utils/linkedlist" + "github.com/enetx/uquic/internal/wire" +) + +type newConnID struct { + SequenceNumber uint64 + ConnectionID protocol.ConnectionID + StatelessResetToken protocol.StatelessResetToken +} + +type connIDManager struct { + queue list.List[newConnID] + + handshakeComplete bool + activeSequenceNumber uint64 + highestRetired uint64 + activeConnectionID protocol.ConnectionID + activeStatelessResetToken *protocol.StatelessResetToken + + // We change the connection ID after sending on average + // protocol.PacketsPerConnectionID packets. The actual value is randomized + // hide the packet loss rate from on-path observers. + rand utils.Rand + packetsSinceLastChange uint32 + packetsPerConnectionID uint32 + + addStatelessResetToken func(protocol.StatelessResetToken) + removeStatelessResetToken func(protocol.StatelessResetToken) + queueControlFrame func(wire.Frame) + + connectionIDLimit uint64 // [UQUIC] custom Connection ID limit +} + +func newConnIDManager( + initialDestConnID protocol.ConnectionID, + addStatelessResetToken func(protocol.StatelessResetToken), + removeStatelessResetToken func(protocol.StatelessResetToken), + queueControlFrame func(wire.Frame), +) *connIDManager { + return &connIDManager{ + activeConnectionID: initialDestConnID, + addStatelessResetToken: addStatelessResetToken, + removeStatelessResetToken: removeStatelessResetToken, + queueControlFrame: queueControlFrame, + } +} + +func (h *connIDManager) AddFromPreferredAddress(connID protocol.ConnectionID, resetToken protocol.StatelessResetToken) error { + return h.addConnectionID(1, connID, resetToken) +} + +func (h *connIDManager) Add(f *wire.NewConnectionIDFrame) error { + if err := h.add(f); err != nil { + return err + } + + // [UQUIC] + connIDLimit := h.connectionIDLimit + if connIDLimit == 0 { + connIDLimit = protocol.MaxActiveConnectionIDs + } + // [/UQUIC] + + if uint64(h.queue.Len()) >= connIDLimit { + return &qerr.TransportError{ErrorCode: qerr.ConnectionIDLimitError} + } + return nil +} + +func (h *connIDManager) add(f *wire.NewConnectionIDFrame) error { + // If the NEW_CONNECTION_ID frame is reordered, such that its sequence number is smaller than the currently active + // connection ID or if it was already retired, send the RETIRE_CONNECTION_ID frame immediately. + if f.SequenceNumber < h.activeSequenceNumber || f.SequenceNumber < h.highestRetired { + h.queueControlFrame(&wire.RetireConnectionIDFrame{ + SequenceNumber: f.SequenceNumber, + }) + return nil + } + + // Retire elements in the queue. + // Doesn't retire the active connection ID. + if f.RetirePriorTo > h.highestRetired { + var next *list.Element[newConnID] + for el := h.queue.Front(); el != nil; el = next { + if el.Value.SequenceNumber >= f.RetirePriorTo { + break + } + next = el.Next() + h.queueControlFrame(&wire.RetireConnectionIDFrame{ + SequenceNumber: el.Value.SequenceNumber, + }) + h.queue.Remove(el) + } + h.highestRetired = f.RetirePriorTo + } + + if f.SequenceNumber == h.activeSequenceNumber { + return nil + } + + if err := h.addConnectionID(f.SequenceNumber, f.ConnectionID, f.StatelessResetToken); err != nil { + return err + } + + // Retire the active connection ID, if necessary. + if h.activeSequenceNumber < f.RetirePriorTo { + // The queue is guaranteed to have at least one element at this point. + h.updateConnectionID() + } + return nil +} + +func (h *connIDManager) addConnectionID(seq uint64, connID protocol.ConnectionID, resetToken protocol.StatelessResetToken) error { + // insert a new element at the end + if h.queue.Len() == 0 || h.queue.Back().Value.SequenceNumber < seq { + h.queue.PushBack(newConnID{ + SequenceNumber: seq, + ConnectionID: connID, + StatelessResetToken: resetToken, + }) + return nil + } + // insert a new element somewhere in the middle + for el := h.queue.Front(); el != nil; el = el.Next() { + if el.Value.SequenceNumber == seq { + if el.Value.ConnectionID != connID { + return fmt.Errorf("received conflicting connection IDs for sequence number %d", seq) + } + if el.Value.StatelessResetToken != resetToken { + return fmt.Errorf("received conflicting stateless reset tokens for sequence number %d", seq) + } + break + } + if el.Value.SequenceNumber > seq { + h.queue.InsertBefore(newConnID{ + SequenceNumber: seq, + ConnectionID: connID, + StatelessResetToken: resetToken, + }, el) + break + } + } + return nil +} + +func (h *connIDManager) updateConnectionID() { + h.queueControlFrame(&wire.RetireConnectionIDFrame{ + SequenceNumber: h.activeSequenceNumber, + }) + h.highestRetired = max(h.highestRetired, h.activeSequenceNumber) + if h.activeStatelessResetToken != nil { + h.removeStatelessResetToken(*h.activeStatelessResetToken) + } + + front := h.queue.Remove(h.queue.Front()) + h.activeSequenceNumber = front.SequenceNumber + h.activeConnectionID = front.ConnectionID + h.activeStatelessResetToken = &front.StatelessResetToken + h.packetsSinceLastChange = 0 + h.packetsPerConnectionID = protocol.PacketsPerConnectionID/2 + uint32(h.rand.Int31n(protocol.PacketsPerConnectionID)) + h.addStatelessResetToken(*h.activeStatelessResetToken) +} + +func (h *connIDManager) Close() { + if h.activeStatelessResetToken != nil { + h.removeStatelessResetToken(*h.activeStatelessResetToken) + } +} + +// is called when the server performs a Retry +// and when the server changes the connection ID in the first Initial sent +func (h *connIDManager) ChangeInitialConnID(newConnID protocol.ConnectionID) { + if h.activeSequenceNumber != 0 { + panic("expected first connection ID to have sequence number 0") + } + h.activeConnectionID = newConnID +} + +// is called when the server provides a stateless reset token in the transport parameters +func (h *connIDManager) SetStatelessResetToken(token protocol.StatelessResetToken) { + if h.activeSequenceNumber != 0 { + panic("expected first connection ID to have sequence number 0") + } + h.activeStatelessResetToken = &token + h.addStatelessResetToken(token) +} + +func (h *connIDManager) SentPacket() { + h.packetsSinceLastChange++ +} + +func (h *connIDManager) shouldUpdateConnID() bool { + if !h.handshakeComplete { + return false + } + // initiate the first change as early as possible (after handshake completion) + if h.queue.Len() > 0 && h.activeSequenceNumber == 0 { + return true + } + // For later changes, only change if + // 1. The queue of connection IDs is filled more than 50%. + // 2. We sent at least PacketsPerConnectionID packets + return 2*h.queue.Len() >= protocol.MaxActiveConnectionIDs && + h.packetsSinceLastChange >= h.packetsPerConnectionID +} + +func (h *connIDManager) Get() protocol.ConnectionID { + if h.shouldUpdateConnID() { + h.updateConnectionID() + } + return h.activeConnectionID +} + +func (h *connIDManager) SetHandshakeComplete() { + h.handshakeComplete = true +} diff --git a/backend/vendor/github.com/enetx/uquic/connection.go b/backend/vendor/github.com/enetx/uquic/connection.go new file mode 100644 index 0000000..e5bf365 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/connection.go @@ -0,0 +1,2397 @@ +package quic + +import ( + "bytes" + "context" + "errors" + "fmt" + "io" + "net" + "reflect" + "sync" + "sync/atomic" + "time" + + tls "github.com/enetx/utls" + + "github.com/enetx/uquic/internal/ackhandler" + "github.com/enetx/uquic/internal/flowcontrol" + "github.com/enetx/uquic/internal/handshake" + "github.com/enetx/uquic/internal/logutils" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/internal/wire" + "github.com/enetx/uquic/logging" +) + +type unpacker interface { + UnpackLongHeader(hdr *wire.Header, rcvTime time.Time, data []byte, v protocol.Version) (*unpackedPacket, error) + UnpackShortHeader(rcvTime time.Time, data []byte) (protocol.PacketNumber, protocol.PacketNumberLen, protocol.KeyPhaseBit, []byte, error) +} + +type streamGetter interface { + GetOrOpenReceiveStream(protocol.StreamID) (receiveStreamI, error) + GetOrOpenSendStream(protocol.StreamID) (sendStreamI, error) +} + +type streamManager interface { + GetOrOpenSendStream(protocol.StreamID) (sendStreamI, error) + GetOrOpenReceiveStream(protocol.StreamID) (receiveStreamI, error) + OpenStream() (Stream, error) + OpenUniStream() (SendStream, error) + OpenStreamSync(context.Context) (Stream, error) + OpenUniStreamSync(context.Context) (SendStream, error) + AcceptStream(context.Context) (Stream, error) + AcceptUniStream(context.Context) (ReceiveStream, error) + DeleteStream(protocol.StreamID) error + UpdateLimits(*wire.TransportParameters) + HandleMaxStreamsFrame(*wire.MaxStreamsFrame) + CloseWithError(error) + ResetFor0RTT() + UseResetMaps() +} + +type cryptoStreamHandler interface { + StartHandshake() error + ChangeConnectionID(protocol.ConnectionID) + SetLargest1RTTAcked(protocol.PacketNumber) error + SetHandshakeConfirmed() + GetSessionTicket() ([]byte, error) + NextEvent() handshake.Event + DiscardInitialKeys() + io.Closer + ConnectionState() handshake.ConnectionState +} + +type receivedPacket struct { + buffer *packetBuffer + + remoteAddr net.Addr + rcvTime time.Time + data []byte + + ecn protocol.ECN + + info packetInfo // only valid if the contained IP address is valid +} + +func (p *receivedPacket) Size() protocol.ByteCount { return protocol.ByteCount(len(p.data)) } + +func (p *receivedPacket) Clone() *receivedPacket { + return &receivedPacket{ + remoteAddr: p.remoteAddr, + rcvTime: p.rcvTime, + data: p.data, + buffer: p.buffer, + ecn: p.ecn, + info: p.info, + } +} + +type connRunner interface { + Add(protocol.ConnectionID, packetHandler) bool + GetStatelessResetToken(protocol.ConnectionID) protocol.StatelessResetToken + Retire(protocol.ConnectionID) + Remove(protocol.ConnectionID) + ReplaceWithClosed([]protocol.ConnectionID, []byte) + AddResetToken(protocol.StatelessResetToken, packetHandler) + RemoveResetToken(protocol.StatelessResetToken) +} + +type closeError struct { + err error + remote bool + immediate bool +} + +type errCloseForRecreating struct { + nextPacketNumber protocol.PacketNumber + nextVersion protocol.Version +} + +func (e *errCloseForRecreating) Error() string { + return "closing connection in order to recreate it" +} + +var connTracingID uint64 // to be accessed atomically +func nextConnTracingID() uint64 { return atomic.AddUint64(&connTracingID, 1) } + +// A Connection is a QUIC connection +type connection struct { + // Destination connection ID used during the handshake. + // Used to check source connection ID on incoming packets. + handshakeDestConnID protocol.ConnectionID + // Set for the client. Destination connection ID used on the first Initial sent. + origDestConnID protocol.ConnectionID + retrySrcConnID *protocol.ConnectionID // only set for the client (and if a Retry was performed) + + srcConnIDLen int + + perspective protocol.Perspective + version protocol.Version + config *Config + + conn sendConn + sendQueue sender + + streamsMap streamManager + connIDManager *connIDManager + connIDGenerator *connIDGenerator + + rttStats *utils.RTTStats + + cryptoStreamManager *cryptoStreamManager + sentPacketHandler ackhandler.SentPacketHandler + receivedPacketHandler ackhandler.ReceivedPacketHandler + retransmissionQueue *retransmissionQueue + framer framer + windowUpdateQueue *windowUpdateQueue + connFlowController flowcontrol.ConnectionFlowController + tokenStoreKey string // only set for the client + tokenGenerator *handshake.TokenGenerator // only set for the server + + unpacker unpacker + frameParser wire.FrameParser + packer packer + mtuDiscoverer mtuDiscoverer // initialized when the handshake completes + + initialStream cryptoStream + handshakeStream cryptoStream + oneRTTStream cryptoStream // only set for the server + cryptoStreamHandler cryptoStreamHandler + + receivedPackets chan receivedPacket + sendingScheduled chan struct{} + + closeOnce sync.Once + // closeChan is used to notify the run loop that it should terminate + closeChan chan closeError + + ctx context.Context + ctxCancel context.CancelCauseFunc + handshakeCtx context.Context + handshakeCtxCancel context.CancelFunc + + undecryptablePackets []receivedPacket // undecryptable packets, waiting for a change in encryption level + undecryptablePacketsToProcess []receivedPacket + + earlyConnReadyChan chan struct{} + sentFirstPacket bool + droppedInitialKeys bool + handshakeComplete bool + handshakeConfirmed bool + + receivedRetry bool + versionNegotiated bool + receivedFirstPacket bool + + // the minimum of the max_idle_timeout values advertised by both endpoints + idleTimeout time.Duration + creationTime time.Time + // The idle timeout is set based on the max of the time we received the last packet... + lastPacketReceivedTime time.Time + // ... and the time we sent a new ack-eliciting packet after receiving a packet. + firstAckElicitingPacketAfterIdleSentTime time.Time + // pacingDeadline is the time when the next packet should be sent + pacingDeadline time.Time + + peerParams *wire.TransportParameters + + timer connectionTimer + // keepAlivePingSent stores whether a keep alive PING is in flight. + // It is reset as soon as we receive a packet from the peer. + keepAlivePingSent bool + keepAliveInterval time.Duration + + datagramQueue *datagramQueue + + connStateMutex sync.Mutex + connState ConnectionState + + logID string + tracer *logging.ConnectionTracer + logger utils.Logger +} + +var ( + _ Connection = &connection{} + _ EarlyConnection = &connection{} + _ streamSender = &connection{} +) + +var newConnection = func( + conn sendConn, + runner connRunner, + origDestConnID protocol.ConnectionID, + retrySrcConnID *protocol.ConnectionID, + clientDestConnID protocol.ConnectionID, + destConnID protocol.ConnectionID, + srcConnID protocol.ConnectionID, + connIDGenerator ConnectionIDGenerator, + statelessResetToken protocol.StatelessResetToken, + conf *Config, + tlsConf *tls.Config, + tokenGenerator *handshake.TokenGenerator, + clientAddressValidated bool, + tracer *logging.ConnectionTracer, + tracingID uint64, + logger utils.Logger, + v protocol.Version, +) quicConn { + s := &connection{ + conn: conn, + config: conf, + handshakeDestConnID: destConnID, + srcConnIDLen: srcConnID.Len(), + tokenGenerator: tokenGenerator, + oneRTTStream: newCryptoStream(), + perspective: protocol.PerspectiveServer, + tracer: tracer, + logger: logger, + version: v, + } + if origDestConnID.Len() > 0 { + s.logID = origDestConnID.String() + } else { + s.logID = destConnID.String() + } + s.connIDManager = newConnIDManager( + destConnID, + func(token protocol.StatelessResetToken) { runner.AddResetToken(token, s) }, + runner.RemoveResetToken, + s.queueControlFrame, + ) + s.connIDGenerator = newConnIDGenerator( + srcConnID, + &clientDestConnID, + func(connID protocol.ConnectionID) { runner.Add(connID, s) }, + runner.GetStatelessResetToken, + runner.Remove, + runner.Retire, + runner.ReplaceWithClosed, + s.queueControlFrame, + connIDGenerator, + ) + s.preSetup() + s.ctx, s.ctxCancel = context.WithCancelCause(context.WithValue(context.Background(), ConnectionTracingKey, tracingID)) + s.sentPacketHandler, s.receivedPacketHandler = ackhandler.NewAckHandler( + 0, + getMaxPacketSize(s.conn.RemoteAddr()), + s.rttStats, + clientAddressValidated, + s.conn.capabilities().ECN, + s.perspective, + s.tracer, + s.logger, + ) + s.mtuDiscoverer = newMTUDiscoverer(s.rttStats, getMaxPacketSize(s.conn.RemoteAddr()), s.sentPacketHandler.SetMaxDatagramSize) + params := &wire.TransportParameters{ + InitialMaxStreamDataBidiLocal: protocol.ByteCount(s.config.InitialStreamReceiveWindow), + InitialMaxStreamDataBidiRemote: protocol.ByteCount(s.config.InitialStreamReceiveWindow), + InitialMaxStreamDataUni: protocol.ByteCount(s.config.InitialStreamReceiveWindow), + InitialMaxData: protocol.ByteCount(s.config.InitialConnectionReceiveWindow), + MaxIdleTimeout: s.config.MaxIdleTimeout, + MaxBidiStreamNum: protocol.StreamNum(s.config.MaxIncomingStreams), + MaxUniStreamNum: protocol.StreamNum(s.config.MaxIncomingUniStreams), + MaxAckDelay: protocol.MaxAckDelayInclGranularity, + AckDelayExponent: protocol.AckDelayExponent, + DisableActiveMigration: true, + StatelessResetToken: &statelessResetToken, + OriginalDestinationConnectionID: origDestConnID, + // For interoperability with quic-go versions before May 2023, this value must be set to a value + // different from protocol.DefaultActiveConnectionIDLimit. + // If set to the default value, it will be omitted from the transport parameters, which will make + // old quic-go versions interpret it as 0, instead of the default value of 2. + // See https://github.com/enetx/uquic/pull/3806. + ActiveConnectionIDLimit: protocol.MaxActiveConnectionIDs, + InitialSourceConnectionID: srcConnID, + RetrySourceConnectionID: retrySrcConnID, + } + if s.config.EnableDatagrams { + params.MaxDatagramFrameSize = wire.MaxDatagramSize + } else { + params.MaxDatagramFrameSize = protocol.InvalidByteCount + } + if s.tracer != nil && s.tracer.SentTransportParameters != nil { + s.tracer.SentTransportParameters(params) + } + cs := handshake.NewCryptoSetupServer( + clientDestConnID, + conn.LocalAddr(), + conn.RemoteAddr(), + params, + tlsConf, + conf.Allow0RTT, + s.rttStats, + tracer, + logger, + s.version, + ) + s.cryptoStreamHandler = cs + s.packer = newPacketPacker(srcConnID, s.connIDManager.Get, s.initialStream, s.handshakeStream, s.sentPacketHandler, s.retransmissionQueue, cs, s.framer, s.receivedPacketHandler, s.datagramQueue, s.perspective) + s.unpacker = newPacketUnpacker(cs, s.srcConnIDLen) + s.cryptoStreamManager = newCryptoStreamManager(cs, s.initialStream, s.handshakeStream, s.oneRTTStream) + return s +} + +// declare this as a variable, such that we can it mock it in the tests +var newClientConnection = func( + conn sendConn, + runner connRunner, + destConnID protocol.ConnectionID, + srcConnID protocol.ConnectionID, + connIDGenerator ConnectionIDGenerator, + conf *Config, + tlsConf *tls.Config, + initialPacketNumber protocol.PacketNumber, + enable0RTT bool, + hasNegotiatedVersion bool, + tracer *logging.ConnectionTracer, + tracingID uint64, + logger utils.Logger, + v protocol.Version, +) quicConn { + s := &connection{ + conn: conn, + config: conf, + origDestConnID: destConnID, + handshakeDestConnID: destConnID, + srcConnIDLen: srcConnID.Len(), + perspective: protocol.PerspectiveClient, + logID: destConnID.String(), + logger: logger, + tracer: tracer, + versionNegotiated: hasNegotiatedVersion, + version: v, + } + s.connIDManager = newConnIDManager( + destConnID, + func(token protocol.StatelessResetToken) { runner.AddResetToken(token, s) }, + runner.RemoveResetToken, + s.queueControlFrame, + ) + + s.connIDGenerator = newConnIDGenerator( + srcConnID, + nil, + func(connID protocol.ConnectionID) { runner.Add(connID, s) }, + runner.GetStatelessResetToken, + runner.Remove, + runner.Retire, + runner.ReplaceWithClosed, + s.queueControlFrame, + connIDGenerator, + ) + s.preSetup() + s.ctx, s.ctxCancel = context.WithCancelCause(context.WithValue(context.Background(), ConnectionTracingKey, tracingID)) + s.sentPacketHandler, s.receivedPacketHandler = ackhandler.NewAckHandler( + initialPacketNumber, + getMaxPacketSize(s.conn.RemoteAddr()), + s.rttStats, + false, // has no effect + s.conn.capabilities().ECN, + s.perspective, + s.tracer, + s.logger, + ) + + s.mtuDiscoverer = newMTUDiscoverer(s.rttStats, getMaxPacketSize(s.conn.RemoteAddr()), s.sentPacketHandler.SetMaxDatagramSize) + oneRTTStream := newCryptoStream() + params := &wire.TransportParameters{ + InitialMaxStreamDataBidiRemote: protocol.ByteCount(s.config.InitialStreamReceiveWindow), + InitialMaxStreamDataBidiLocal: protocol.ByteCount(s.config.InitialStreamReceiveWindow), + InitialMaxStreamDataUni: protocol.ByteCount(s.config.InitialStreamReceiveWindow), + InitialMaxData: protocol.ByteCount(s.config.InitialConnectionReceiveWindow), + MaxIdleTimeout: s.config.MaxIdleTimeout, + MaxBidiStreamNum: protocol.StreamNum(s.config.MaxIncomingStreams), + MaxUniStreamNum: protocol.StreamNum(s.config.MaxIncomingUniStreams), + MaxAckDelay: protocol.MaxAckDelayInclGranularity, + AckDelayExponent: protocol.AckDelayExponent, + DisableActiveMigration: true, + // For interoperability with quic-go versions before May 2023, this value must be set to a value + // different from protocol.DefaultActiveConnectionIDLimit. + // If set to the default value, it will be omitted from the transport parameters, which will make + // old quic-go versions interpret it as 0, instead of the default value of 2. + // See https://github.com/enetx/uquic/pull/3806. + ActiveConnectionIDLimit: protocol.MaxActiveConnectionIDs, + InitialSourceConnectionID: srcConnID, + } + if s.config.EnableDatagrams { + params.MaxDatagramFrameSize = wire.MaxDatagramSize + } else { + params.MaxDatagramFrameSize = protocol.InvalidByteCount + } + if s.tracer != nil && s.tracer.SentTransportParameters != nil { + s.tracer.SentTransportParameters(params) + } + cs := handshake.NewCryptoSetupClient( + destConnID, + params, + tlsConf, + enable0RTT, + s.rttStats, + tracer, + logger, + s.version, + ) + + s.cryptoStreamHandler = cs + s.cryptoStreamManager = newCryptoStreamManager(cs, s.initialStream, s.handshakeStream, oneRTTStream) + s.unpacker = newPacketUnpacker(cs, s.srcConnIDLen) + s.packer = newPacketPacker(srcConnID, s.connIDManager.Get, s.initialStream, s.handshakeStream, s.sentPacketHandler, s.retransmissionQueue, cs, s.framer, s.receivedPacketHandler, s.datagramQueue, s.perspective) + if len(tlsConf.ServerName) > 0 { + s.tokenStoreKey = tlsConf.ServerName + } else { + s.tokenStoreKey = conn.RemoteAddr().String() + } + if s.config.TokenStore != nil { + if token := s.config.TokenStore.Pop(s.tokenStoreKey); token != nil { + s.packer.SetToken(token.data) + } + } + return s +} + +func (s *connection) preSetup() { + s.initialStream = newCryptoStream() + s.handshakeStream = newCryptoStream() + s.sendQueue = newSendQueue(s.conn) + s.retransmissionQueue = newRetransmissionQueue() + s.frameParser = *wire.NewFrameParser(s.config.EnableDatagrams) + s.rttStats = &utils.RTTStats{} + s.connFlowController = flowcontrol.NewConnectionFlowController( + protocol.ByteCount(s.config.InitialConnectionReceiveWindow), + protocol.ByteCount(s.config.MaxConnectionReceiveWindow), + s.onHasConnectionWindowUpdate, + func(size protocol.ByteCount) bool { + if s.config.AllowConnectionWindowIncrease == nil { + return true + } + return s.config.AllowConnectionWindowIncrease(s, uint64(size)) + }, + s.rttStats, + s.logger, + ) + s.earlyConnReadyChan = make(chan struct{}) + s.streamsMap = newStreamsMap( + s, + s.newFlowController, + uint64(s.config.MaxIncomingStreams), + uint64(s.config.MaxIncomingUniStreams), + s.perspective, + ) + s.framer = newFramer(s.streamsMap) + s.receivedPackets = make(chan receivedPacket, protocol.MaxConnUnprocessedPackets) + s.closeChan = make(chan closeError, 1) + s.sendingScheduled = make(chan struct{}, 1) + s.handshakeCtx, s.handshakeCtxCancel = context.WithCancel(context.Background()) + + now := time.Now() + s.lastPacketReceivedTime = now + s.creationTime = now + + s.windowUpdateQueue = newWindowUpdateQueue(s.streamsMap, s.connFlowController, s.framer.QueueControlFrame) + s.datagramQueue = newDatagramQueue(s.scheduleSending, s.logger) + s.connState.Version = s.version +} + +// run the connection main loop +func (s *connection) run() error { + var closeErr closeError + defer func() { + s.ctxCancel(closeErr.err) + }() + + s.timer = *newTimer() + + if err := s.cryptoStreamHandler.StartHandshake(); err != nil { + return err + } + if err := s.handleHandshakeEvents(); err != nil { + return err + } + go func() { + if err := s.sendQueue.Run(); err != nil { + s.destroyImpl(err) + } + }() + + if s.perspective == protocol.PerspectiveClient { + s.scheduleSending() // so the ClientHello actually gets sent + } + + var sendQueueAvailable <-chan struct{} + +runLoop: + for { + if s.framer.QueuedTooManyControlFrames() { + s.closeLocal(&qerr.TransportError{ErrorCode: InternalError}) + } + // Close immediately if requested + select { + case closeErr = <-s.closeChan: + break runLoop + default: + } + + s.maybeResetTimer() + + var processedUndecryptablePacket bool + if len(s.undecryptablePacketsToProcess) > 0 { + queue := s.undecryptablePacketsToProcess + s.undecryptablePacketsToProcess = nil + for _, p := range queue { + if processed := s.handlePacketImpl(p); processed { + processedUndecryptablePacket = true + } + // Don't set timers and send packets if the packet made us close the connection. + select { + case closeErr = <-s.closeChan: + break runLoop + default: + } + } + } + // If we processed any undecryptable packets, jump to the resetting of the timers directly. + if !processedUndecryptablePacket { + select { + case closeErr = <-s.closeChan: + break runLoop + case <-s.timer.Chan(): + s.timer.SetRead() + // We do all the interesting stuff after the switch statement, so + // nothing to see here. + case <-s.sendingScheduled: + // We do all the interesting stuff after the switch statement, so + // nothing to see here. + case <-sendQueueAvailable: + case firstPacket := <-s.receivedPackets: + wasProcessed := s.handlePacketImpl(firstPacket) + // Don't set timers and send packets if the packet made us close the connection. + select { + case closeErr = <-s.closeChan: + break runLoop + default: + } + if s.handshakeComplete { + // Now process all packets in the receivedPackets channel. + // Limit the number of packets to the length of the receivedPackets channel, + // so we eventually get a chance to send out an ACK when receiving a lot of packets. + numPackets := len(s.receivedPackets) + receiveLoop: + for i := 0; i < numPackets; i++ { + select { + case p := <-s.receivedPackets: + if processed := s.handlePacketImpl(p); processed { + wasProcessed = true + } + select { + case closeErr = <-s.closeChan: + break runLoop + default: + } + default: + break receiveLoop + } + } + } + // Only reset the timers if this packet was actually processed. + // This avoids modifying any state when handling undecryptable packets, + // which could be injected by an attacker. + if !wasProcessed { + continue + } + } + } + + now := time.Now() + if timeout := s.sentPacketHandler.GetLossDetectionTimeout(); !timeout.IsZero() && timeout.Before(now) { + // This could cause packets to be retransmitted. + // Check it before trying to send packets. + if err := s.sentPacketHandler.OnLossDetectionTimeout(); err != nil { + s.closeLocal(err) + } + } + + if keepAliveTime := s.nextKeepAliveTime(); !keepAliveTime.IsZero() && !now.Before(keepAliveTime) { + // send a PING frame since there is no activity in the connection + s.logger.Debugf("Sending a keep-alive PING to keep the connection alive.") + s.framer.QueueControlFrame(&wire.PingFrame{}) + s.keepAlivePingSent = true + } else if !s.handshakeComplete && now.Sub(s.creationTime) >= s.config.handshakeTimeout() { + s.destroyImpl(qerr.ErrHandshakeTimeout) + continue + } else { + idleTimeoutStartTime := s.idleTimeoutStartTime() + if (!s.handshakeComplete && now.Sub(idleTimeoutStartTime) >= s.config.HandshakeIdleTimeout) || + (s.handshakeComplete && now.After(s.nextIdleTimeoutTime())) { + s.destroyImpl(qerr.ErrIdleTimeout) + continue + } + } + + if s.sendQueue.WouldBlock() { + // The send queue is still busy sending out packets. + // Wait until there's space to enqueue new packets. + sendQueueAvailable = s.sendQueue.Available() + continue + } + if err := s.triggerSending(now); err != nil { + s.closeLocal(err) + } + if s.sendQueue.WouldBlock() { + sendQueueAvailable = s.sendQueue.Available() + } else { + sendQueueAvailable = nil + } + } + + s.cryptoStreamHandler.Close() + s.sendQueue.Close() // close the send queue before sending the CONNECTION_CLOSE + s.handleCloseError(&closeErr) + if s.tracer != nil && s.tracer.Close != nil { + if e := (&errCloseForRecreating{}); !errors.As(closeErr.err, &e) { + s.tracer.Close() + } + } + s.logger.Infof("Connection %s closed.", s.logID) + s.timer.Stop() + return closeErr.err +} + +// blocks until the early connection can be used +func (s *connection) earlyConnReady() <-chan struct{} { + return s.earlyConnReadyChan +} + +func (s *connection) HandshakeComplete() <-chan struct{} { + return s.handshakeCtx.Done() +} + +func (s *connection) Context() context.Context { + return s.ctx +} + +func (s *connection) supportsDatagrams() bool { + return s.peerParams.MaxDatagramFrameSize > 0 +} + +func (s *connection) ConnectionState() ConnectionState { + s.connStateMutex.Lock() + defer s.connStateMutex.Unlock() + cs := s.cryptoStreamHandler.ConnectionState() + s.connState.TLS = cs.ConnectionState + s.connState.Used0RTT = cs.Used0RTT + s.connState.GSO = s.conn.capabilities().GSO + return s.connState +} + +// Time when the connection should time out +func (s *connection) nextIdleTimeoutTime() time.Time { + idleTimeout := max(s.idleTimeout, s.rttStats.PTO(true)*3) + return s.idleTimeoutStartTime().Add(idleTimeout) +} + +// Time when the next keep-alive packet should be sent. +// It returns a zero time if no keep-alive should be sent. +func (s *connection) nextKeepAliveTime() time.Time { + if s.config.KeepAlivePeriod == 0 || s.keepAlivePingSent || !s.firstAckElicitingPacketAfterIdleSentTime.IsZero() { + return time.Time{} + } + keepAliveInterval := max(s.keepAliveInterval, s.rttStats.PTO(true)*3/2) + return s.lastPacketReceivedTime.Add(keepAliveInterval) +} + +func (s *connection) maybeResetTimer() { + var deadline time.Time + if !s.handshakeComplete { + deadline = utils.MinTime( + s.creationTime.Add(s.config.handshakeTimeout()), + s.idleTimeoutStartTime().Add(s.config.HandshakeIdleTimeout), + ) + } else { + if keepAliveTime := s.nextKeepAliveTime(); !keepAliveTime.IsZero() { + deadline = keepAliveTime + } else { + deadline = s.nextIdleTimeoutTime() + } + } + + s.timer.SetTimer( + deadline, + s.receivedPacketHandler.GetAlarmTimeout(), + s.sentPacketHandler.GetLossDetectionTimeout(), + s.pacingDeadline, + ) +} + +func (s *connection) idleTimeoutStartTime() time.Time { + return utils.MaxTime(s.lastPacketReceivedTime, s.firstAckElicitingPacketAfterIdleSentTime) +} + +func (s *connection) handleHandshakeComplete() error { + defer s.handshakeCtxCancel() + // Once the handshake completes, we have derived 1-RTT keys. + // There's no point in queueing undecryptable packets for later decryption anymore. + s.undecryptablePackets = nil + + s.connIDManager.SetHandshakeComplete() + s.connIDGenerator.SetHandshakeComplete() + + if s.tracer != nil && s.tracer.ChoseALPN != nil { + s.tracer.ChoseALPN(s.cryptoStreamHandler.ConnectionState().NegotiatedProtocol) + } + + // The server applies transport parameters right away, but the client side has to wait for handshake completion. + // During a 0-RTT connection, the client is only allowed to use the new transport parameters for 1-RTT packets. + if s.perspective == protocol.PerspectiveClient { + s.applyTransportParameters() + return nil + } + + // All these only apply to the server side. + if err := s.handleHandshakeConfirmed(); err != nil { + return err + } + + ticket, err := s.cryptoStreamHandler.GetSessionTicket() + if err != nil { + return err + } + if ticket != nil { // may be nil if session tickets are disabled via tls.Config.SessionTicketsDisabled + s.oneRTTStream.Write(ticket) + for s.oneRTTStream.HasData() { + s.queueControlFrame(s.oneRTTStream.PopCryptoFrame(protocol.MaxPostHandshakeCryptoFrameSize)) + } + } + token, err := s.tokenGenerator.NewToken(s.conn.RemoteAddr()) + if err != nil { + return err + } + s.queueControlFrame(&wire.NewTokenFrame{Token: token}) + s.queueControlFrame(&wire.HandshakeDoneFrame{}) + return nil +} + +func (s *connection) handleHandshakeConfirmed() error { + if err := s.dropEncryptionLevel(protocol.EncryptionHandshake); err != nil { + return err + } + + s.handshakeConfirmed = true + s.sentPacketHandler.SetHandshakeConfirmed() + s.cryptoStreamHandler.SetHandshakeConfirmed() + + if !s.config.DisablePathMTUDiscovery && s.conn.capabilities().DF { + maxPacketSize := s.peerParams.MaxUDPPayloadSize + if maxPacketSize == 0 { + maxPacketSize = protocol.MaxByteCount + } + s.mtuDiscoverer.Start(min(maxPacketSize, protocol.MaxPacketBufferSize)) + } + return nil +} + +func (s *connection) handlePacketImpl(rp receivedPacket) bool { + s.sentPacketHandler.ReceivedBytes(rp.Size()) + + if wire.IsVersionNegotiationPacket(rp.data) { + s.handleVersionNegotiationPacket(rp) + return false + } + + var counter uint8 + var lastConnID protocol.ConnectionID + var processed bool + data := rp.data + p := rp + for len(data) > 0 { + var destConnID protocol.ConnectionID + if counter > 0 { + p = *(p.Clone()) + p.data = data + + var err error + destConnID, err = wire.ParseConnectionID(p.data, s.srcConnIDLen) + if err != nil { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(logging.PacketTypeNotDetermined, protocol.InvalidPacketNumber, protocol.ByteCount(len(data)), logging.PacketDropHeaderParseError) + } + s.logger.Debugf("error parsing packet, couldn't parse connection ID: %s", err) + break + } + if destConnID != lastConnID { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(logging.PacketTypeNotDetermined, protocol.InvalidPacketNumber, protocol.ByteCount(len(data)), logging.PacketDropUnknownConnectionID) + } + s.logger.Debugf("coalesced packet has different destination connection ID: %s, expected %s", destConnID, lastConnID) + break + } + } + + if wire.IsLongHeaderPacket(p.data[0]) { + hdr, packetData, rest, err := wire.ParsePacket(p.data) + if err != nil { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + dropReason := logging.PacketDropHeaderParseError + if err == wire.ErrUnsupportedVersion { + dropReason = logging.PacketDropUnsupportedVersion + } + s.tracer.DroppedPacket(logging.PacketTypeNotDetermined, protocol.InvalidPacketNumber, protocol.ByteCount(len(data)), dropReason) + } + s.logger.Debugf("error parsing packet: %s", err) + break + } + lastConnID = hdr.DestConnectionID + + if hdr.Version != s.version { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(logging.PacketTypeFromHeader(hdr), protocol.InvalidPacketNumber, protocol.ByteCount(len(data)), logging.PacketDropUnexpectedVersion) + } + s.logger.Debugf("Dropping packet with version %x. Expected %x.", hdr.Version, s.version) + break + } + + if counter > 0 { + p.buffer.Split() + } + counter++ + + // only log if this actually a coalesced packet + if s.logger.Debug() && (counter > 1 || len(rest) > 0) { + s.logger.Debugf("Parsed a coalesced packet. Part %d: %d bytes. Remaining: %d bytes.", counter, len(packetData), len(rest)) + } + + p.data = packetData + + if wasProcessed := s.handleLongHeaderPacket(p, hdr); wasProcessed { + processed = true + } + data = rest + } else { + if counter > 0 { + p.buffer.Split() + } + processed = s.handleShortHeaderPacket(p, destConnID) + break + } + } + + p.buffer.MaybeRelease() + return processed +} + +func (s *connection) handleShortHeaderPacket(p receivedPacket, destConnID protocol.ConnectionID) bool { + var wasQueued bool + + defer func() { + // Put back the packet buffer if the packet wasn't queued for later decryption. + if !wasQueued { + p.buffer.Decrement() + } + }() + + pn, pnLen, keyPhase, data, err := s.unpacker.UnpackShortHeader(p.rcvTime, p.data) + if err != nil { + wasQueued = s.handleUnpackError(err, p, logging.PacketType1RTT) + return false + } + + if s.logger.Debug() { + s.logger.Debugf("<- Reading packet %d (%d bytes) for connection %s, 1-RTT", pn, p.Size(), destConnID) + wire.LogShortHeader(s.logger, destConnID, pn, pnLen, keyPhase) + } + + if s.receivedPacketHandler.IsPotentiallyDuplicate(pn, protocol.Encryption1RTT) { + s.logger.Debugf("Dropping (potentially) duplicate packet.") + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(logging.PacketType1RTT, pn, p.Size(), logging.PacketDropDuplicate) + } + return false + } + + var log func([]logging.Frame) + if s.tracer != nil && s.tracer.ReceivedShortHeaderPacket != nil { + log = func(frames []logging.Frame) { + s.tracer.ReceivedShortHeaderPacket( + &logging.ShortHeader{ + DestConnectionID: destConnID, + PacketNumber: pn, + PacketNumberLen: pnLen, + KeyPhase: keyPhase, + }, + p.Size(), + p.ecn, + frames, + ) + } + } + if err := s.handleUnpackedShortHeaderPacket(destConnID, pn, data, p.ecn, p.rcvTime, log); err != nil { + s.closeLocal(err) + return false + } + return true +} + +func (s *connection) handleLongHeaderPacket(p receivedPacket, hdr *wire.Header) bool /* was the packet successfully processed */ { + var wasQueued bool + + defer func() { + // Put back the packet buffer if the packet wasn't queued for later decryption. + if !wasQueued { + p.buffer.Decrement() + } + }() + + if hdr.Type == protocol.PacketTypeRetry { + return s.handleRetryPacket(hdr, p.data, p.rcvTime) + } + + // The server can change the source connection ID with the first Handshake packet. + // After this, all packets with a different source connection have to be ignored. + if s.receivedFirstPacket && hdr.Type == protocol.PacketTypeInitial && hdr.SrcConnectionID != s.handshakeDestConnID { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(logging.PacketTypeInitial, protocol.InvalidPacketNumber, p.Size(), logging.PacketDropUnknownConnectionID) + } + s.logger.Debugf("Dropping Initial packet (%d bytes) with unexpected source connection ID: %s (expected %s)", p.Size(), hdr.SrcConnectionID, s.handshakeDestConnID) + return false + } + // drop 0-RTT packets, if we are a client + if s.perspective == protocol.PerspectiveClient && hdr.Type == protocol.PacketType0RTT { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(logging.PacketType0RTT, protocol.InvalidPacketNumber, p.Size(), logging.PacketDropKeyUnavailable) + } + return false + } + + packet, err := s.unpacker.UnpackLongHeader(hdr, p.rcvTime, p.data, s.version) + if err != nil { + wasQueued = s.handleUnpackError(err, p, logging.PacketTypeFromHeader(hdr)) + return false + } + + if s.logger.Debug() { + s.logger.Debugf("<- Reading packet %d (%d bytes) for connection %s, %s", packet.hdr.PacketNumber, p.Size(), hdr.DestConnectionID, packet.encryptionLevel) + packet.hdr.Log(s.logger) + } + + if pn := packet.hdr.PacketNumber; s.receivedPacketHandler.IsPotentiallyDuplicate(pn, packet.encryptionLevel) { + s.logger.Debugf("Dropping (potentially) duplicate packet.") + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(logging.PacketTypeFromHeader(hdr), pn, p.Size(), logging.PacketDropDuplicate) + } + return false + } + + if err := s.handleUnpackedLongHeaderPacket(packet, p.ecn, p.rcvTime, p.Size()); err != nil { + s.closeLocal(err) + return false + } + return true +} + +func (s *connection) handleUnpackError(err error, p receivedPacket, pt logging.PacketType) (wasQueued bool) { + switch err { + case handshake.ErrKeysDropped: + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(pt, protocol.InvalidPacketNumber, p.Size(), logging.PacketDropKeyUnavailable) + } + s.logger.Debugf("Dropping %s packet (%d bytes) because we already dropped the keys.", pt, p.Size()) + case handshake.ErrKeysNotYetAvailable: + // Sealer for this encryption level not yet available. + // Try again later. + s.tryQueueingUndecryptablePacket(p, pt) + return true + case wire.ErrInvalidReservedBits: + s.closeLocal(&qerr.TransportError{ + ErrorCode: qerr.ProtocolViolation, + ErrorMessage: err.Error(), + }) + case handshake.ErrDecryptionFailed: + // This might be a packet injected by an attacker. Drop it. + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(pt, protocol.InvalidPacketNumber, p.Size(), logging.PacketDropPayloadDecryptError) + } + s.logger.Debugf("Dropping %s packet (%d bytes) that could not be unpacked. Error: %s", pt, p.Size(), err) + default: + var headerErr *headerParseError + if errors.As(err, &headerErr) { + // This might be a packet injected by an attacker. Drop it. + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(pt, protocol.InvalidPacketNumber, p.Size(), logging.PacketDropHeaderParseError) + } + s.logger.Debugf("Dropping %s packet (%d bytes) for which we couldn't unpack the header. Error: %s", pt, p.Size(), err) + } else { + // This is an error returned by the AEAD (other than ErrDecryptionFailed). + // For example, a PROTOCOL_VIOLATION due to key updates. + s.closeLocal(err) + } + } + return false +} + +func (s *connection) handleRetryPacket(hdr *wire.Header, data []byte, rcvTime time.Time) bool /* was this a valid Retry */ { + if s.perspective == protocol.PerspectiveServer { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(logging.PacketTypeRetry, protocol.InvalidPacketNumber, protocol.ByteCount(len(data)), logging.PacketDropUnexpectedPacket) + } + s.logger.Debugf("Ignoring Retry.") + return false + } + if s.receivedFirstPacket { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(logging.PacketTypeRetry, protocol.InvalidPacketNumber, protocol.ByteCount(len(data)), logging.PacketDropUnexpectedPacket) + } + s.logger.Debugf("Ignoring Retry, since we already received a packet.") + return false + } + destConnID := s.connIDManager.Get() + if hdr.SrcConnectionID == destConnID { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(logging.PacketTypeRetry, protocol.InvalidPacketNumber, protocol.ByteCount(len(data)), logging.PacketDropUnexpectedPacket) + } + s.logger.Debugf("Ignoring Retry, since the server didn't change the Source Connection ID.") + return false + } + // If a token is already set, this means that we already received a Retry from the server. + // Ignore this Retry packet. + if s.receivedRetry { + s.logger.Debugf("Ignoring Retry, since a Retry was already received.") + return false + } + + tag := handshake.GetRetryIntegrityTag(data[:len(data)-16], destConnID, hdr.Version) + if !bytes.Equal(data[len(data)-16:], tag[:]) { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(logging.PacketTypeRetry, protocol.InvalidPacketNumber, protocol.ByteCount(len(data)), logging.PacketDropPayloadDecryptError) + } + s.logger.Debugf("Ignoring spoofed Retry. Integrity Tag doesn't match.") + return false + } + + if s.logger.Debug() { + s.logger.Debugf("<- Received Retry:") + (&wire.ExtendedHeader{Header: *hdr}).Log(s.logger) + s.logger.Debugf("Switching destination connection ID to: %s", hdr.SrcConnectionID) + } + if s.tracer != nil && s.tracer.ReceivedRetry != nil { + s.tracer.ReceivedRetry(hdr) + } + newDestConnID := hdr.SrcConnectionID + s.receivedRetry = true + if err := s.sentPacketHandler.ResetForRetry(rcvTime); err != nil { + s.closeLocal(err) + return false + } + s.handshakeDestConnID = newDestConnID + s.retrySrcConnID = &newDestConnID + s.cryptoStreamHandler.ChangeConnectionID(newDestConnID) + s.packer.SetToken(hdr.Token) + s.connIDManager.ChangeInitialConnID(newDestConnID) + s.scheduleSending() + return true +} + +func (s *connection) handleVersionNegotiationPacket(p receivedPacket) { + if s.perspective == protocol.PerspectiveServer || // servers never receive version negotiation packets + s.receivedFirstPacket || s.versionNegotiated { // ignore delayed / duplicated version negotiation packets + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(logging.PacketTypeVersionNegotiation, protocol.InvalidPacketNumber, p.Size(), logging.PacketDropUnexpectedPacket) + } + return + } + + src, dest, supportedVersions, err := wire.ParseVersionNegotiationPacket(p.data) + if err != nil { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(logging.PacketTypeVersionNegotiation, protocol.InvalidPacketNumber, p.Size(), logging.PacketDropHeaderParseError) + } + s.logger.Debugf("Error parsing Version Negotiation packet: %s", err) + return + } + + for _, v := range supportedVersions { + if v == s.version { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(logging.PacketTypeVersionNegotiation, protocol.InvalidPacketNumber, p.Size(), logging.PacketDropUnexpectedVersion) + } + // The Version Negotiation packet contains the version that we offered. + // This might be a packet sent by an attacker, or it was corrupted. + return + } + } + + s.logger.Infof("Received a Version Negotiation packet. Supported Versions: %s", supportedVersions) + if s.tracer != nil && s.tracer.ReceivedVersionNegotiationPacket != nil { + s.tracer.ReceivedVersionNegotiationPacket(dest, src, supportedVersions) + } + newVersion, ok := protocol.ChooseSupportedVersion(s.config.Versions, supportedVersions) + if !ok { + s.destroyImpl(&VersionNegotiationError{ + Ours: s.config.Versions, + Theirs: supportedVersions, + }) + s.logger.Infof("No compatible QUIC version found.") + return + } + if s.tracer != nil && s.tracer.NegotiatedVersion != nil { + s.tracer.NegotiatedVersion(newVersion, s.config.Versions, supportedVersions) + } + + s.logger.Infof("Switching to QUIC version %s.", newVersion) + nextPN, _ := s.sentPacketHandler.PeekPacketNumber(protocol.EncryptionInitial) + s.destroyImpl(&errCloseForRecreating{ + nextPacketNumber: nextPN, + nextVersion: newVersion, + }) +} + +func (s *connection) handleUnpackedLongHeaderPacket( + packet *unpackedPacket, + ecn protocol.ECN, + rcvTime time.Time, + packetSize protocol.ByteCount, // only for logging +) error { + if !s.receivedFirstPacket { + s.receivedFirstPacket = true + if !s.versionNegotiated && s.tracer != nil && s.tracer.NegotiatedVersion != nil { + var clientVersions, serverVersions []protocol.Version + switch s.perspective { + case protocol.PerspectiveClient: + clientVersions = s.config.Versions + case protocol.PerspectiveServer: + serverVersions = s.config.Versions + } + s.tracer.NegotiatedVersion(s.version, clientVersions, serverVersions) + } + // The server can change the source connection ID with the first Handshake packet. + if s.perspective == protocol.PerspectiveClient && packet.hdr.SrcConnectionID != s.handshakeDestConnID { + cid := packet.hdr.SrcConnectionID + s.logger.Debugf("Received first packet. Switching destination connection ID to: %s", cid) + s.handshakeDestConnID = cid + s.connIDManager.ChangeInitialConnID(cid) + } + // We create the connection as soon as we receive the first packet from the client. + // We do that before authenticating the packet. + // That means that if the source connection ID was corrupted, + // we might have created a connection with an incorrect source connection ID. + // Once we authenticate the first packet, we need to update it. + if s.perspective == protocol.PerspectiveServer { + if packet.hdr.SrcConnectionID != s.handshakeDestConnID { + s.handshakeDestConnID = packet.hdr.SrcConnectionID + s.connIDManager.ChangeInitialConnID(packet.hdr.SrcConnectionID) + } + if s.tracer != nil && s.tracer.StartedConnection != nil { + s.tracer.StartedConnection( + s.conn.LocalAddr(), + s.conn.RemoteAddr(), + packet.hdr.SrcConnectionID, + packet.hdr.DestConnectionID, + ) + } + } + } + + if s.perspective == protocol.PerspectiveServer && packet.encryptionLevel == protocol.EncryptionHandshake && + !s.droppedInitialKeys { + // On the server side, Initial keys are dropped as soon as the first Handshake packet is received. + // See Section 4.9.1 of RFC 9001. + if err := s.dropEncryptionLevel(protocol.EncryptionInitial); err != nil { + return err + } + } + + s.lastPacketReceivedTime = rcvTime + s.firstAckElicitingPacketAfterIdleSentTime = time.Time{} + s.keepAlivePingSent = false + + var log func([]logging.Frame) + if s.tracer != nil && s.tracer.ReceivedLongHeaderPacket != nil { + log = func(frames []logging.Frame) { + s.tracer.ReceivedLongHeaderPacket(packet.hdr, packetSize, ecn, frames) + } + } + isAckEliciting, err := s.handleFrames(packet.data, packet.hdr.DestConnectionID, packet.encryptionLevel, log) + if err != nil { + return err + } + return s.receivedPacketHandler.ReceivedPacket(packet.hdr.PacketNumber, ecn, packet.encryptionLevel, rcvTime, isAckEliciting) +} + +func (s *connection) handleUnpackedShortHeaderPacket( + destConnID protocol.ConnectionID, + pn protocol.PacketNumber, + data []byte, + ecn protocol.ECN, + rcvTime time.Time, + log func([]logging.Frame), +) error { + s.lastPacketReceivedTime = rcvTime + s.firstAckElicitingPacketAfterIdleSentTime = time.Time{} + s.keepAlivePingSent = false + + isAckEliciting, err := s.handleFrames(data, destConnID, protocol.Encryption1RTT, log) + if err != nil { + return err + } + return s.receivedPacketHandler.ReceivedPacket(pn, ecn, protocol.Encryption1RTT, rcvTime, isAckEliciting) +} + +func (s *connection) handleFrames( + data []byte, + destConnID protocol.ConnectionID, + encLevel protocol.EncryptionLevel, + log func([]logging.Frame), +) (isAckEliciting bool, _ error) { + // Only used for tracing. + // If we're not tracing, this slice will always remain empty. + var frames []logging.Frame + if log != nil { + frames = make([]logging.Frame, 0, 4) + } + handshakeWasComplete := s.handshakeComplete + var handleErr error + for len(data) > 0 { + l, frame, err := s.frameParser.ParseNext(data, encLevel, s.version) + if err != nil { + return false, err + } + data = data[l:] + if frame == nil { + break + } + if ackhandler.IsFrameAckEliciting(frame) { + isAckEliciting = true + } + if log != nil { + frames = append(frames, logutils.ConvertFrame(frame)) + } + // An error occurred handling a previous frame. + // Don't handle the current frame. + if handleErr != nil { + continue + } + if err := s.handleFrame(frame, encLevel, destConnID); err != nil { + if log == nil { + return false, err + } + // If we're logging, we need to keep parsing (but not handling) all frames. + handleErr = err + } + } + + if log != nil { + log(frames) + if handleErr != nil { + return false, handleErr + } + } + + // Handle completion of the handshake after processing all the frames. + // This ensures that we correctly handle the following case on the server side: + // We receive a Handshake packet that contains the CRYPTO frame that allows us to complete the handshake, + // and an ACK serialized after that CRYPTO frame. In this case, we still want to process the ACK frame. + if !handshakeWasComplete && s.handshakeComplete { + if err := s.handleHandshakeComplete(); err != nil { + return false, err + } + } + + return +} + +func (s *connection) handleFrame(f wire.Frame, encLevel protocol.EncryptionLevel, destConnID protocol.ConnectionID) error { + var err error + wire.LogFrame(s.logger, f, false) + switch frame := f.(type) { + case *wire.CryptoFrame: + err = s.handleCryptoFrame(frame, encLevel) + case *wire.StreamFrame: + err = s.handleStreamFrame(frame) + case *wire.AckFrame: + err = s.handleAckFrame(frame, encLevel) + case *wire.ConnectionCloseFrame: + s.handleConnectionCloseFrame(frame) + case *wire.ResetStreamFrame: + err = s.handleResetStreamFrame(frame) + case *wire.MaxDataFrame: + s.handleMaxDataFrame(frame) + case *wire.MaxStreamDataFrame: + err = s.handleMaxStreamDataFrame(frame) + case *wire.MaxStreamsFrame: + s.handleMaxStreamsFrame(frame) + case *wire.DataBlockedFrame: + case *wire.StreamDataBlockedFrame: + case *wire.StreamsBlockedFrame: + case *wire.StopSendingFrame: + err = s.handleStopSendingFrame(frame) + case *wire.PingFrame: + case *wire.PathChallengeFrame: + s.handlePathChallengeFrame(frame) + case *wire.PathResponseFrame: + // since we don't send PATH_CHALLENGEs, we don't expect PATH_RESPONSEs + err = errors.New("unexpected PATH_RESPONSE frame") + case *wire.NewTokenFrame: + err = s.handleNewTokenFrame(frame) + case *wire.NewConnectionIDFrame: + err = s.handleNewConnectionIDFrame(frame) + case *wire.RetireConnectionIDFrame: + err = s.handleRetireConnectionIDFrame(frame, destConnID) + case *wire.HandshakeDoneFrame: + err = s.handleHandshakeDoneFrame() + case *wire.DatagramFrame: + err = s.handleDatagramFrame(frame) + default: + err = fmt.Errorf("unexpected frame type: %s", reflect.ValueOf(&frame).Elem().Type().Name()) + } + return err +} + +// handlePacket is called by the server with a new packet +func (s *connection) handlePacket(p receivedPacket) { + // Discard packets once the amount of queued packets is larger than + // the channel size, protocol.MaxConnUnprocessedPackets + select { + case s.receivedPackets <- p: + default: + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(logging.PacketTypeNotDetermined, protocol.InvalidPacketNumber, p.Size(), logging.PacketDropDOSPrevention) + } + } +} + +func (s *connection) handleConnectionCloseFrame(frame *wire.ConnectionCloseFrame) { + if frame.IsApplicationError { + s.closeRemote(&qerr.ApplicationError{ + Remote: true, + ErrorCode: qerr.ApplicationErrorCode(frame.ErrorCode), + ErrorMessage: frame.ReasonPhrase, + }) + return + } + s.closeRemote(&qerr.TransportError{ + Remote: true, + ErrorCode: qerr.TransportErrorCode(frame.ErrorCode), + FrameType: frame.FrameType, + ErrorMessage: frame.ReasonPhrase, + }) +} + +func (s *connection) handleCryptoFrame(frame *wire.CryptoFrame, encLevel protocol.EncryptionLevel) error { + if err := s.cryptoStreamManager.HandleCryptoFrame(frame, encLevel); err != nil { + return err + } + return s.handleHandshakeEvents() +} + +func (s *connection) handleHandshakeEvents() error { + for { + ev := s.cryptoStreamHandler.NextEvent() + var err error + switch ev.Kind { + case handshake.EventNoEvent: + return nil + case handshake.EventHandshakeComplete: + // Don't call handleHandshakeComplete yet. + // It's advantageous to process ACK frames that might be serialized after the CRYPTO frame first. + s.handshakeComplete = true + case handshake.EventReceivedTransportParameters: + err = s.handleTransportParameters(ev.TransportParameters) + case handshake.EventRestoredTransportParameters: + s.restoreTransportParameters(ev.TransportParameters) + close(s.earlyConnReadyChan) + case handshake.EventReceivedReadKeys: + // Queue all packets for decryption that have been undecryptable so far. + s.undecryptablePacketsToProcess = s.undecryptablePackets + s.undecryptablePackets = nil + case handshake.EventDiscard0RTTKeys: + err = s.dropEncryptionLevel(protocol.Encryption0RTT) + case handshake.EventWriteInitialData: + _, err = s.initialStream.Write(ev.Data) + case handshake.EventWriteHandshakeData: + _, err = s.handshakeStream.Write(ev.Data) + } + if err != nil { + return err + } + } +} + +func (s *connection) handleStreamFrame(frame *wire.StreamFrame) error { + str, err := s.streamsMap.GetOrOpenReceiveStream(frame.StreamID) + if err != nil { + return err + } + if str == nil { + // Stream is closed and already garbage collected + // ignore this StreamFrame + return nil + } + return str.handleStreamFrame(frame) +} + +func (s *connection) handleMaxDataFrame(frame *wire.MaxDataFrame) { + s.connFlowController.UpdateSendWindow(frame.MaximumData) +} + +func (s *connection) handleMaxStreamDataFrame(frame *wire.MaxStreamDataFrame) error { + str, err := s.streamsMap.GetOrOpenSendStream(frame.StreamID) + if err != nil { + return err + } + if str == nil { + // stream is closed and already garbage collected + return nil + } + str.updateSendWindow(frame.MaximumStreamData) + return nil +} + +func (s *connection) handleMaxStreamsFrame(frame *wire.MaxStreamsFrame) { + s.streamsMap.HandleMaxStreamsFrame(frame) +} + +func (s *connection) handleResetStreamFrame(frame *wire.ResetStreamFrame) error { + str, err := s.streamsMap.GetOrOpenReceiveStream(frame.StreamID) + if err != nil { + return err + } + if str == nil { + // stream is closed and already garbage collected + return nil + } + return str.handleResetStreamFrame(frame) +} + +func (s *connection) handleStopSendingFrame(frame *wire.StopSendingFrame) error { + str, err := s.streamsMap.GetOrOpenSendStream(frame.StreamID) + if err != nil { + return err + } + if str == nil { + // stream is closed and already garbage collected + return nil + } + str.handleStopSendingFrame(frame) + return nil +} + +func (s *connection) handlePathChallengeFrame(frame *wire.PathChallengeFrame) { + s.queueControlFrame(&wire.PathResponseFrame{Data: frame.Data}) +} + +func (s *connection) handleNewTokenFrame(frame *wire.NewTokenFrame) error { + if s.perspective == protocol.PerspectiveServer { + return &qerr.TransportError{ + ErrorCode: qerr.ProtocolViolation, + ErrorMessage: "received NEW_TOKEN frame from the client", + } + } + if s.config.TokenStore != nil { + s.config.TokenStore.Put(s.tokenStoreKey, &ClientToken{data: frame.Token}) + } + return nil +} + +func (s *connection) handleNewConnectionIDFrame(f *wire.NewConnectionIDFrame) error { + return s.connIDManager.Add(f) +} + +func (s *connection) handleRetireConnectionIDFrame(f *wire.RetireConnectionIDFrame, destConnID protocol.ConnectionID) error { + return s.connIDGenerator.Retire(f.SequenceNumber, destConnID) +} + +func (s *connection) handleHandshakeDoneFrame() error { + if s.perspective == protocol.PerspectiveServer { + return &qerr.TransportError{ + ErrorCode: qerr.ProtocolViolation, + ErrorMessage: "received a HANDSHAKE_DONE frame", + } + } + if !s.handshakeConfirmed { + return s.handleHandshakeConfirmed() + } + return nil +} + +func (s *connection) handleAckFrame(frame *wire.AckFrame, encLevel protocol.EncryptionLevel) error { + acked1RTTPacket, err := s.sentPacketHandler.ReceivedAck(frame, encLevel, s.lastPacketReceivedTime) + if err != nil { + return err + } + if !acked1RTTPacket { + return nil + } + // On the client side: If the packet acknowledged a 1-RTT packet, this confirms the handshake. + // This is only possible if the ACK was sent in a 1-RTT packet. + // This is an optimization over simply waiting for a HANDSHAKE_DONE frame, see section 4.1.2 of RFC 9001. + if s.perspective == protocol.PerspectiveClient && !s.handshakeConfirmed { + if err := s.handleHandshakeConfirmed(); err != nil { + return err + } + } + return s.cryptoStreamHandler.SetLargest1RTTAcked(frame.LargestAcked()) +} + +func (s *connection) handleDatagramFrame(f *wire.DatagramFrame) error { + if f.Length(s.version) > wire.MaxDatagramSize { + return &qerr.TransportError{ + ErrorCode: qerr.ProtocolViolation, + ErrorMessage: "DATAGRAM frame too large", + } + } + s.datagramQueue.HandleDatagramFrame(f) + return nil +} + +// closeLocal closes the connection and send a CONNECTION_CLOSE containing the error +func (s *connection) closeLocal(e error) { + s.closeOnce.Do(func() { + if e == nil { + s.logger.Infof("Closing connection.") + } else { + s.logger.Errorf("Closing connection with error: %s", e) + } + s.closeChan <- closeError{err: e, immediate: false, remote: false} + }) +} + +// destroy closes the connection without sending the error on the wire +func (s *connection) destroy(e error) { + s.destroyImpl(e) + <-s.ctx.Done() +} + +func (s *connection) destroyImpl(e error) { + s.closeOnce.Do(func() { + if nerr, ok := e.(net.Error); ok && nerr.Timeout() { + s.logger.Errorf("Destroying connection: %s", e) + } else { + s.logger.Errorf("Destroying connection with error: %s", e) + } + s.closeChan <- closeError{err: e, immediate: true, remote: false} + }) +} + +func (s *connection) closeRemote(e error) { + s.closeOnce.Do(func() { + s.logger.Errorf("Peer closed connection with error: %s", e) + s.closeChan <- closeError{err: e, immediate: true, remote: true} + }) +} + +func (s *connection) CloseWithError(code ApplicationErrorCode, desc string) error { + s.closeLocal(&qerr.ApplicationError{ + ErrorCode: code, + ErrorMessage: desc, + }) + <-s.ctx.Done() + return nil +} + +func (s *connection) closeWithTransportError(code TransportErrorCode) { + s.closeLocal(&qerr.TransportError{ErrorCode: code}) + <-s.ctx.Done() +} + +func (s *connection) handleCloseError(closeErr *closeError) { + e := closeErr.err + if e == nil { + e = &qerr.ApplicationError{} + } else { + defer func() { + closeErr.err = e + }() + } + + var ( + statelessResetErr *StatelessResetError + versionNegotiationErr *VersionNegotiationError + recreateErr *errCloseForRecreating + applicationErr *ApplicationError + transportErr *TransportError + ) + switch { + case errors.Is(e, qerr.ErrIdleTimeout), + errors.Is(e, qerr.ErrHandshakeTimeout), + errors.As(e, &statelessResetErr), + errors.As(e, &versionNegotiationErr), + errors.As(e, &recreateErr), + errors.As(e, &applicationErr), + errors.As(e, &transportErr): + default: + e = &qerr.TransportError{ + ErrorCode: qerr.InternalError, + ErrorMessage: e.Error(), + } + } + + s.streamsMap.CloseWithError(e) + s.connIDManager.Close() + if s.datagramQueue != nil { + s.datagramQueue.CloseWithError(e) + } + + if s.tracer != nil && s.tracer.ClosedConnection != nil && !errors.As(e, &recreateErr) { + s.tracer.ClosedConnection(e) + } + + // If this is a remote close we're done here + if closeErr.remote { + s.connIDGenerator.ReplaceWithClosed(nil) + return + } + if closeErr.immediate { + s.connIDGenerator.RemoveAll() + return + } + // Don't send out any CONNECTION_CLOSE if this is an error that occurred + // before we even sent out the first packet. + if s.perspective == protocol.PerspectiveClient && !s.sentFirstPacket { + s.connIDGenerator.RemoveAll() + return + } + connClosePacket, err := s.sendConnectionClose(e) + if err != nil { + s.logger.Debugf("Error sending CONNECTION_CLOSE: %s", err) + } + s.connIDGenerator.ReplaceWithClosed(connClosePacket) +} + +func (s *connection) dropEncryptionLevel(encLevel protocol.EncryptionLevel) error { + if s.tracer != nil && s.tracer.DroppedEncryptionLevel != nil { + s.tracer.DroppedEncryptionLevel(encLevel) + } + s.sentPacketHandler.DropPackets(encLevel) + s.receivedPacketHandler.DropPackets(encLevel) + //nolint:exhaustive // only Initial and 0-RTT need special treatment + switch encLevel { + case protocol.EncryptionInitial: + s.droppedInitialKeys = true + s.cryptoStreamHandler.DiscardInitialKeys() + case protocol.Encryption0RTT: + s.streamsMap.ResetFor0RTT() + if err := s.connFlowController.Reset(); err != nil { + return err + } + return s.framer.Handle0RTTRejection() + } + return s.cryptoStreamManager.Drop(encLevel) +} + +// is called for the client, when restoring transport parameters saved for 0-RTT +func (s *connection) restoreTransportParameters(params *wire.TransportParameters) { + if s.logger.Debug() { + s.logger.Debugf("Restoring Transport Parameters: %s", params) + } + + s.peerParams = params + s.connIDGenerator.SetMaxActiveConnIDs(params.ActiveConnectionIDLimit) + s.connFlowController.UpdateSendWindow(params.InitialMaxData) + s.streamsMap.UpdateLimits(params) + s.connStateMutex.Lock() + s.connState.SupportsDatagrams = s.supportsDatagrams() + s.connStateMutex.Unlock() +} + +func (s *connection) handleTransportParameters(params *wire.TransportParameters) error { + if s.tracer != nil && s.tracer.ReceivedTransportParameters != nil { + s.tracer.ReceivedTransportParameters(params) + } + if err := s.checkTransportParameters(params); err != nil { + return &qerr.TransportError{ + ErrorCode: qerr.TransportParameterError, + ErrorMessage: err.Error(), + } + } + + if s.perspective == protocol.PerspectiveClient && s.peerParams != nil && s.ConnectionState().Used0RTT && !params.ValidForUpdate(s.peerParams) { + return &qerr.TransportError{ + ErrorCode: qerr.ProtocolViolation, + ErrorMessage: "server sent reduced limits after accepting 0-RTT data", + } + } + + s.peerParams = params + // On the client side we have to wait for handshake completion. + // During a 0-RTT connection, we are only allowed to use the new transport parameters for 1-RTT packets. + if s.perspective == protocol.PerspectiveServer { + s.applyTransportParameters() + // On the server side, the early connection is ready as soon as we processed + // the client's transport parameters. + close(s.earlyConnReadyChan) + } + + s.connStateMutex.Lock() + s.connState.SupportsDatagrams = s.supportsDatagrams() + s.connStateMutex.Unlock() + return nil +} + +func (s *connection) checkTransportParameters(params *wire.TransportParameters) error { + if s.logger.Debug() { + s.logger.Debugf("Processed Transport Parameters: %s", params) + } + + // check the initial_source_connection_id + if params.InitialSourceConnectionID != s.handshakeDestConnID { + return fmt.Errorf("expected initial_source_connection_id to equal %s, is %s", s.handshakeDestConnID, params.InitialSourceConnectionID) + } + + if s.perspective == protocol.PerspectiveServer { + return nil + } + // check the original_destination_connection_id + if params.OriginalDestinationConnectionID != s.origDestConnID { + return fmt.Errorf("expected original_destination_connection_id to equal %s, is %s", s.origDestConnID, params.OriginalDestinationConnectionID) + } + if s.retrySrcConnID != nil { // a Retry was performed + if params.RetrySourceConnectionID == nil { + return errors.New("missing retry_source_connection_id") + } + if *params.RetrySourceConnectionID != *s.retrySrcConnID { + return fmt.Errorf("expected retry_source_connection_id to equal %s, is %s", s.retrySrcConnID, *params.RetrySourceConnectionID) + } + } else if params.RetrySourceConnectionID != nil { + return errors.New("received retry_source_connection_id, although no Retry was performed") + } + return nil +} + +func (s *connection) applyTransportParameters() { + params := s.peerParams + // Our local idle timeout will always be > 0. + s.idleTimeout = utils.MinNonZeroDuration(s.config.MaxIdleTimeout, params.MaxIdleTimeout) + s.keepAliveInterval = min(s.config.KeepAlivePeriod, min(s.idleTimeout/2, protocol.MaxKeepAliveInterval)) + s.streamsMap.UpdateLimits(params) + s.frameParser.SetAckDelayExponent(params.AckDelayExponent) + s.connFlowController.UpdateSendWindow(params.InitialMaxData) + s.rttStats.SetMaxAckDelay(params.MaxAckDelay) + s.connIDGenerator.SetMaxActiveConnIDs(params.ActiveConnectionIDLimit) + if params.StatelessResetToken != nil { + s.connIDManager.SetStatelessResetToken(*params.StatelessResetToken) + } + // We don't support connection migration yet, so we don't have any use for the preferred_address. + if params.PreferredAddress != nil { + // Retire the connection ID. + s.connIDManager.AddFromPreferredAddress(params.PreferredAddress.ConnectionID, params.PreferredAddress.StatelessResetToken) + } +} + +func (s *connection) triggerSending(now time.Time) error { + s.pacingDeadline = time.Time{} + + sendMode := s.sentPacketHandler.SendMode(now) + //nolint:exhaustive // No need to handle pacing limited here. + switch sendMode { + case ackhandler.SendAny: + return s.sendPackets(now) + case ackhandler.SendNone: + return nil + case ackhandler.SendPacingLimited: + deadline := s.sentPacketHandler.TimeUntilSend() + if deadline.IsZero() { + deadline = deadlineSendImmediately + } + s.pacingDeadline = deadline + // Allow sending of an ACK if we're pacing limit. + // This makes sure that a peer that is mostly receiving data (and thus has an inaccurate cwnd estimate) + // sends enough ACKs to allow its peer to utilize the bandwidth. + fallthrough + case ackhandler.SendAck: + // We can at most send a single ACK only packet. + // There will only be a new ACK after receiving new packets. + // SendAck is only returned when we're congestion limited, so we don't need to set the pacinggs timer. + return s.maybeSendAckOnlyPacket(now) + case ackhandler.SendPTOInitial: + if err := s.sendProbePacket(protocol.EncryptionInitial, now); err != nil { + return err + } + if s.sendQueue.WouldBlock() { + s.scheduleSending() + return nil + } + return s.triggerSending(now) + case ackhandler.SendPTOHandshake: + if err := s.sendProbePacket(protocol.EncryptionHandshake, now); err != nil { + return err + } + if s.sendQueue.WouldBlock() { + s.scheduleSending() + return nil + } + return s.triggerSending(now) + case ackhandler.SendPTOAppData: + if err := s.sendProbePacket(protocol.Encryption1RTT, now); err != nil { + return err + } + if s.sendQueue.WouldBlock() { + s.scheduleSending() + return nil + } + return s.triggerSending(now) + default: + return fmt.Errorf("BUG: invalid send mode %d", sendMode) + } +} + +func (s *connection) sendPackets(now time.Time) error { + // Path MTU Discovery + // Can't use GSO, since we need to send a single packet that's larger than our current maximum size. + // Performance-wise, this doesn't matter, since we only send a very small (<10) number of + // MTU probe packets per connection. + if s.handshakeConfirmed && s.mtuDiscoverer != nil && s.mtuDiscoverer.ShouldSendProbe(now) { + ping, size := s.mtuDiscoverer.GetPing() + p, buf, err := s.packer.PackMTUProbePacket(ping, size, s.version) + if err != nil { + return err + } + ecn := s.sentPacketHandler.ECNMode(true) + s.logShortHeaderPacket(p.DestConnID, p.Ack, p.Frames, p.StreamFrames, p.PacketNumber, p.PacketNumberLen, p.KeyPhase, ecn, buf.Len(), false) + s.registerPackedShortHeaderPacket(p, ecn, now) + s.sendQueue.Send(buf, 0, ecn) + // This is kind of a hack. We need to trigger sending again somehow. + s.pacingDeadline = deadlineSendImmediately + return nil + } + + if isBlocked, offset := s.connFlowController.IsNewlyBlocked(); isBlocked { + s.framer.QueueControlFrame(&wire.DataBlockedFrame{MaximumData: offset}) + } + s.windowUpdateQueue.QueueAll() + if cf := s.cryptoStreamManager.GetPostHandshakeData(protocol.MaxPostHandshakeCryptoFrameSize); cf != nil { + s.queueControlFrame(cf) + } + + if !s.handshakeConfirmed { + packet, err := s.packer.PackCoalescedPacket(false, s.mtuDiscoverer.CurrentSize(), s.version) + if err != nil || packet == nil { + return err + } + s.sentFirstPacket = true + if err := s.sendPackedCoalescedPacket(packet, s.sentPacketHandler.ECNMode(packet.IsOnlyShortHeaderPacket()), now); err != nil { + return err + } + sendMode := s.sentPacketHandler.SendMode(now) + if sendMode == ackhandler.SendPacingLimited { + s.resetPacingDeadline() + } else if sendMode == ackhandler.SendAny { + s.pacingDeadline = deadlineSendImmediately + } + return nil + } + + if s.conn.capabilities().GSO { + return s.sendPacketsWithGSO(now) + } + return s.sendPacketsWithoutGSO(now) +} + +func (s *connection) sendPacketsWithoutGSO(now time.Time) error { + for { + buf := getPacketBuffer() + ecn := s.sentPacketHandler.ECNMode(true) + if _, err := s.appendOneShortHeaderPacket(buf, s.mtuDiscoverer.CurrentSize(), ecn, now); err != nil { + if err == errNothingToPack { + buf.Release() + return nil + } + return err + } + + s.sendQueue.Send(buf, 0, ecn) + + if s.sendQueue.WouldBlock() { + return nil + } + sendMode := s.sentPacketHandler.SendMode(now) + if sendMode == ackhandler.SendPacingLimited { + s.resetPacingDeadline() + return nil + } + if sendMode != ackhandler.SendAny { + return nil + } + // Prioritize receiving of packets over sending out more packets. + if len(s.receivedPackets) > 0 { + s.pacingDeadline = deadlineSendImmediately + return nil + } + } +} + +func (s *connection) sendPacketsWithGSO(now time.Time) error { + buf := getLargePacketBuffer() + maxSize := s.mtuDiscoverer.CurrentSize() + + ecn := s.sentPacketHandler.ECNMode(true) + for { + var dontSendMore bool + size, err := s.appendOneShortHeaderPacket(buf, maxSize, ecn, now) + if err != nil { + if err != errNothingToPack { + return err + } + if buf.Len() == 0 { + buf.Release() + return nil + } + dontSendMore = true + } + + if !dontSendMore { + sendMode := s.sentPacketHandler.SendMode(now) + if sendMode == ackhandler.SendPacingLimited { + s.resetPacingDeadline() + } + if sendMode != ackhandler.SendAny { + dontSendMore = true + } + } + + // Don't send more packets in this batch if they require a different ECN marking than the previous ones. + nextECN := s.sentPacketHandler.ECNMode(true) + + // Append another packet if + // 1. The congestion controller and pacer allow sending more + // 2. The last packet appended was a full-size packet + // 3. The next packet will have the same ECN marking + // 4. We still have enough space for another full-size packet in the buffer + if !dontSendMore && size == maxSize && nextECN == ecn && buf.Len()+maxSize <= buf.Cap() { + continue + } + + s.sendQueue.Send(buf, uint16(maxSize), ecn) + + if dontSendMore { + return nil + } + if s.sendQueue.WouldBlock() { + return nil + } + + // Prioritize receiving of packets over sending out more packets. + if len(s.receivedPackets) > 0 { + s.pacingDeadline = deadlineSendImmediately + return nil + } + + buf = getLargePacketBuffer() + } +} + +func (s *connection) resetPacingDeadline() { + deadline := s.sentPacketHandler.TimeUntilSend() + if deadline.IsZero() { + deadline = deadlineSendImmediately + } + s.pacingDeadline = deadline +} + +func (s *connection) maybeSendAckOnlyPacket(now time.Time) error { + if !s.handshakeConfirmed { + ecn := s.sentPacketHandler.ECNMode(false) + packet, err := s.packer.PackCoalescedPacket(true, s.mtuDiscoverer.CurrentSize(), s.version) + if err != nil { + return err + } + if packet == nil { + return nil + } + return s.sendPackedCoalescedPacket(packet, ecn, now) + } + + ecn := s.sentPacketHandler.ECNMode(true) + p, buf, err := s.packer.PackAckOnlyPacket(s.mtuDiscoverer.CurrentSize(), s.version) + if err != nil { + if err == errNothingToPack { + return nil + } + return err + } + s.logShortHeaderPacket(p.DestConnID, p.Ack, p.Frames, p.StreamFrames, p.PacketNumber, p.PacketNumberLen, p.KeyPhase, ecn, buf.Len(), false) + s.registerPackedShortHeaderPacket(p, ecn, now) + s.sendQueue.Send(buf, 0, ecn) + return nil +} + +func (s *connection) sendProbePacket(encLevel protocol.EncryptionLevel, now time.Time) error { + // Queue probe packets until we actually send out a packet, + // or until there are no more packets to queue. + var packet *coalescedPacket + for { + if wasQueued := s.sentPacketHandler.QueueProbePacket(encLevel); !wasQueued { + break + } + var err error + packet, err = s.packer.MaybePackProbePacket(encLevel, s.mtuDiscoverer.CurrentSize(), s.version) + if err != nil { + return err + } + if packet != nil { + break + } + } + if packet == nil { + s.retransmissionQueue.AddPing(encLevel) + var err error + packet, err = s.packer.MaybePackProbePacket(encLevel, s.mtuDiscoverer.CurrentSize(), s.version) + if err != nil { + return err + } + } + if packet == nil || (len(packet.longHdrPackets) == 0 && packet.shortHdrPacket == nil) { + return fmt.Errorf("connection BUG: couldn't pack %s probe packet", encLevel) + } + return s.sendPackedCoalescedPacket(packet, s.sentPacketHandler.ECNMode(packet.IsOnlyShortHeaderPacket()), now) +} + +// appendOneShortHeaderPacket appends a new packet to the given packetBuffer. +// If there was nothing to pack, the returned size is 0. +func (s *connection) appendOneShortHeaderPacket(buf *packetBuffer, maxSize protocol.ByteCount, ecn protocol.ECN, now time.Time) (protocol.ByteCount, error) { + startLen := buf.Len() + p, err := s.packer.AppendPacket(buf, maxSize, s.version) + if err != nil { + return 0, err + } + size := buf.Len() - startLen + s.logShortHeaderPacket(p.DestConnID, p.Ack, p.Frames, p.StreamFrames, p.PacketNumber, p.PacketNumberLen, p.KeyPhase, ecn, size, false) + s.registerPackedShortHeaderPacket(p, ecn, now) + return size, nil +} + +func (s *connection) registerPackedShortHeaderPacket(p shortHeaderPacket, ecn protocol.ECN, now time.Time) { + if s.firstAckElicitingPacketAfterIdleSentTime.IsZero() && (len(p.StreamFrames) > 0 || ackhandler.HasAckElicitingFrames(p.Frames)) { + s.firstAckElicitingPacketAfterIdleSentTime = now + } + + largestAcked := protocol.InvalidPacketNumber + if p.Ack != nil { + largestAcked = p.Ack.LargestAcked() + } + s.sentPacketHandler.SentPacket(now, p.PacketNumber, largestAcked, p.StreamFrames, p.Frames, protocol.Encryption1RTT, ecn, p.Length, p.IsPathMTUProbePacket) + s.connIDManager.SentPacket() +} + +func (s *connection) sendPackedCoalescedPacket(packet *coalescedPacket, ecn protocol.ECN, now time.Time) error { + s.logCoalescedPacket(packet, ecn) + for _, p := range packet.longHdrPackets { + if s.firstAckElicitingPacketAfterIdleSentTime.IsZero() && p.IsAckEliciting() { + s.firstAckElicitingPacketAfterIdleSentTime = now + } + largestAcked := protocol.InvalidPacketNumber + if p.ack != nil { + largestAcked = p.ack.LargestAcked() + } + s.sentPacketHandler.SentPacket(now, p.header.PacketNumber, largestAcked, p.streamFrames, p.frames, p.EncryptionLevel(), ecn, p.length, false) + if s.perspective == protocol.PerspectiveClient && p.EncryptionLevel() == protocol.EncryptionHandshake && + !s.droppedInitialKeys { + // On the client side, Initial keys are dropped as soon as the first Handshake packet is sent. + // See Section 4.9.1 of RFC 9001. + if err := s.dropEncryptionLevel(protocol.EncryptionInitial); err != nil { + return err + } + } + } + if p := packet.shortHdrPacket; p != nil { + if s.firstAckElicitingPacketAfterIdleSentTime.IsZero() && p.IsAckEliciting() { + s.firstAckElicitingPacketAfterIdleSentTime = now + } + largestAcked := protocol.InvalidPacketNumber + if p.Ack != nil { + largestAcked = p.Ack.LargestAcked() + } + s.sentPacketHandler.SentPacket(now, p.PacketNumber, largestAcked, p.StreamFrames, p.Frames, protocol.Encryption1RTT, ecn, p.Length, p.IsPathMTUProbePacket) + } + s.connIDManager.SentPacket() + s.sendQueue.Send(packet.buffer, 0, ecn) + return nil +} + +func (s *connection) sendConnectionClose(e error) ([]byte, error) { + var packet *coalescedPacket + var err error + var transportErr *qerr.TransportError + var applicationErr *qerr.ApplicationError + if errors.As(e, &transportErr) { + packet, err = s.packer.PackConnectionClose(transportErr, s.mtuDiscoverer.CurrentSize(), s.version) + } else if errors.As(e, &applicationErr) { + packet, err = s.packer.PackApplicationClose(applicationErr, s.mtuDiscoverer.CurrentSize(), s.version) + } else { + packet, err = s.packer.PackConnectionClose(&qerr.TransportError{ + ErrorCode: qerr.InternalError, + ErrorMessage: fmt.Sprintf("connection BUG: unspecified error type (msg: %s)", e.Error()), + }, s.mtuDiscoverer.CurrentSize(), s.version) + } + if err != nil { + return nil, err + } + ecn := s.sentPacketHandler.ECNMode(packet.IsOnlyShortHeaderPacket()) + s.logCoalescedPacket(packet, ecn) + return packet.buffer.Data, s.conn.Write(packet.buffer.Data, 0, ecn) +} + +func (s *connection) logLongHeaderPacket(p *longHeaderPacket, ecn protocol.ECN) { + // quic-go logging + if s.logger.Debug() { + p.header.Log(s.logger) + if p.ack != nil { + wire.LogFrame(s.logger, p.ack, true) + } + for _, frame := range p.frames { + wire.LogFrame(s.logger, frame.Frame, true) + } + for _, frame := range p.streamFrames { + wire.LogFrame(s.logger, frame.Frame, true) + } + } + + // tracing + if s.tracer != nil && s.tracer.SentLongHeaderPacket != nil { + frames := make([]logging.Frame, 0, len(p.frames)) + for _, f := range p.frames { + frames = append(frames, logutils.ConvertFrame(f.Frame)) + } + for _, f := range p.streamFrames { + frames = append(frames, logutils.ConvertFrame(f.Frame)) + } + var ack *logging.AckFrame + if p.ack != nil { + ack = logutils.ConvertAckFrame(p.ack) + } + s.tracer.SentLongHeaderPacket(p.header, p.length, ecn, ack, frames) + } +} + +func (s *connection) logShortHeaderPacket( + destConnID protocol.ConnectionID, + ackFrame *wire.AckFrame, + frames []ackhandler.Frame, + streamFrames []ackhandler.StreamFrame, + pn protocol.PacketNumber, + pnLen protocol.PacketNumberLen, + kp protocol.KeyPhaseBit, + ecn protocol.ECN, + size protocol.ByteCount, + isCoalesced bool, +) { + if s.logger.Debug() && !isCoalesced { + s.logger.Debugf("-> Sending packet %d (%d bytes) for connection %s, 1-RTT (ECN: %s)", pn, size, s.logID, ecn) + } + // quic-go logging + if s.logger.Debug() { + wire.LogShortHeader(s.logger, destConnID, pn, pnLen, kp) + if ackFrame != nil { + wire.LogFrame(s.logger, ackFrame, true) + } + for _, f := range frames { + wire.LogFrame(s.logger, f.Frame, true) + } + for _, f := range streamFrames { + wire.LogFrame(s.logger, f.Frame, true) + } + } + + // tracing + if s.tracer != nil && s.tracer.SentShortHeaderPacket != nil { + fs := make([]logging.Frame, 0, len(frames)+len(streamFrames)) + for _, f := range frames { + fs = append(fs, logutils.ConvertFrame(f.Frame)) + } + for _, f := range streamFrames { + fs = append(fs, logutils.ConvertFrame(f.Frame)) + } + var ack *logging.AckFrame + if ackFrame != nil { + ack = logutils.ConvertAckFrame(ackFrame) + } + s.tracer.SentShortHeaderPacket( + &logging.ShortHeader{ + DestConnectionID: destConnID, + PacketNumber: pn, + PacketNumberLen: pnLen, + KeyPhase: kp, + }, + size, + ecn, + ack, + fs, + ) + } +} + +func (s *connection) logCoalescedPacket(packet *coalescedPacket, ecn protocol.ECN) { + if s.logger.Debug() { + // There's a short period between dropping both Initial and Handshake keys and completion of the handshake, + // during which we might call PackCoalescedPacket but just pack a short header packet. + if len(packet.longHdrPackets) == 0 && packet.shortHdrPacket != nil { + s.logShortHeaderPacket( + packet.shortHdrPacket.DestConnID, + packet.shortHdrPacket.Ack, + packet.shortHdrPacket.Frames, + packet.shortHdrPacket.StreamFrames, + packet.shortHdrPacket.PacketNumber, + packet.shortHdrPacket.PacketNumberLen, + packet.shortHdrPacket.KeyPhase, + ecn, + packet.shortHdrPacket.Length, + false, + ) + return + } + if len(packet.longHdrPackets) > 1 { + s.logger.Debugf("-> Sending coalesced packet (%d parts, %d bytes) for connection %s", len(packet.longHdrPackets), packet.buffer.Len(), s.logID) + } else { + s.logger.Debugf("-> Sending packet %d (%d bytes) for connection %s, %s", packet.longHdrPackets[0].header.PacketNumber, packet.buffer.Len(), s.logID, packet.longHdrPackets[0].EncryptionLevel()) + } + } + for _, p := range packet.longHdrPackets { + s.logLongHeaderPacket(p, ecn) + } + if p := packet.shortHdrPacket; p != nil { + s.logShortHeaderPacket(p.DestConnID, p.Ack, p.Frames, p.StreamFrames, p.PacketNumber, p.PacketNumberLen, p.KeyPhase, ecn, p.Length, true) + } +} + +// AcceptStream returns the next stream openend by the peer +func (s *connection) AcceptStream(ctx context.Context) (Stream, error) { + return s.streamsMap.AcceptStream(ctx) +} + +func (s *connection) AcceptUniStream(ctx context.Context) (ReceiveStream, error) { + return s.streamsMap.AcceptUniStream(ctx) +} + +// OpenStream opens a stream +func (s *connection) OpenStream() (Stream, error) { + return s.streamsMap.OpenStream() +} + +func (s *connection) OpenStreamSync(ctx context.Context) (Stream, error) { + return s.streamsMap.OpenStreamSync(ctx) +} + +func (s *connection) OpenUniStream() (SendStream, error) { + return s.streamsMap.OpenUniStream() +} + +func (s *connection) OpenUniStreamSync(ctx context.Context) (SendStream, error) { + return s.streamsMap.OpenUniStreamSync(ctx) +} + +func (s *connection) newFlowController(id protocol.StreamID) flowcontrol.StreamFlowController { + initialSendWindow := s.peerParams.InitialMaxStreamDataUni + if id.Type() == protocol.StreamTypeBidi { + if id.InitiatedBy() == s.perspective { + initialSendWindow = s.peerParams.InitialMaxStreamDataBidiRemote + } else { + initialSendWindow = s.peerParams.InitialMaxStreamDataBidiLocal + } + } + return flowcontrol.NewStreamFlowController( + id, + s.connFlowController, + protocol.ByteCount(s.config.InitialStreamReceiveWindow), + protocol.ByteCount(s.config.MaxStreamReceiveWindow), + initialSendWindow, + s.onHasStreamWindowUpdate, + s.rttStats, + s.logger, + ) +} + +// scheduleSending signals that we have data for sending +func (s *connection) scheduleSending() { + select { + case s.sendingScheduled <- struct{}{}: + default: + } +} + +// tryQueueingUndecryptablePacket queues a packet for which we're missing the decryption keys. +// The logging.PacketType is only used for logging purposes. +func (s *connection) tryQueueingUndecryptablePacket(p receivedPacket, pt logging.PacketType) { + if s.handshakeComplete { + panic("shouldn't queue undecryptable packets after handshake completion") + } + if len(s.undecryptablePackets)+1 > protocol.MaxUndecryptablePackets { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(pt, protocol.InvalidPacketNumber, p.Size(), logging.PacketDropDOSPrevention) + } + s.logger.Infof("Dropping undecryptable packet (%d bytes). Undecryptable packet queue full.", p.Size()) + return + } + s.logger.Infof("Queueing packet (%d bytes) for later decryption", p.Size()) + if s.tracer != nil && s.tracer.BufferedPacket != nil { + s.tracer.BufferedPacket(pt, p.Size()) + } + s.undecryptablePackets = append(s.undecryptablePackets, p) +} + +func (s *connection) queueControlFrame(f wire.Frame) { + s.framer.QueueControlFrame(f) + s.scheduleSending() +} + +func (s *connection) onHasStreamWindowUpdate(id protocol.StreamID) { + s.windowUpdateQueue.AddStream(id) + s.scheduleSending() +} + +func (s *connection) onHasConnectionWindowUpdate() { + s.windowUpdateQueue.AddConnection() + s.scheduleSending() +} + +func (s *connection) onHasStreamData(id protocol.StreamID) { + s.framer.AddActiveStream(id) + s.scheduleSending() +} + +func (s *connection) onStreamCompleted(id protocol.StreamID) { + if err := s.streamsMap.DeleteStream(id); err != nil { + s.closeLocal(err) + } +} + +func (s *connection) SendDatagram(p []byte) error { + if !s.supportsDatagrams() { + return errors.New("datagram support disabled") + } + + f := &wire.DatagramFrame{DataLenPresent: true} + if protocol.ByteCount(len(p)) > f.MaxDataLen(s.peerParams.MaxDatagramFrameSize, s.version) { + return &DatagramTooLargeError{ + PeerMaxDatagramFrameSize: int64(s.peerParams.MaxDatagramFrameSize), + } + } + f.Data = make([]byte, len(p)) + copy(f.Data, p) + return s.datagramQueue.Add(f) +} + +func (s *connection) ReceiveDatagram(ctx context.Context) ([]byte, error) { + if !s.config.EnableDatagrams { + return nil, errors.New("datagram support disabled") + } + return s.datagramQueue.Receive(ctx) +} + +func (s *connection) LocalAddr() net.Addr { + return s.conn.LocalAddr() +} + +func (s *connection) RemoteAddr() net.Addr { + return s.conn.RemoteAddr() +} + +func (s *connection) GetVersion() protocol.Version { + return s.version +} + +func (s *connection) NextConnection() Connection { + <-s.HandshakeComplete() + s.streamsMap.UseResetMaps() + return s +} diff --git a/backend/vendor/github.com/enetx/uquic/connection_timer.go b/backend/vendor/github.com/enetx/uquic/connection_timer.go new file mode 100644 index 0000000..dd51e5c --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/connection_timer.go @@ -0,0 +1,51 @@ +package quic + +import ( + "time" + + "github.com/enetx/uquic/internal/utils" +) + +var deadlineSendImmediately = time.Time{}.Add(42 * time.Millisecond) // any value > time.Time{} and before time.Now() is fine + +type connectionTimer struct { + timer *utils.Timer + last time.Time +} + +func newTimer() *connectionTimer { + return &connectionTimer{timer: utils.NewTimer()} +} + +func (t *connectionTimer) SetRead() { + if deadline := t.timer.Deadline(); deadline != deadlineSendImmediately { + t.last = deadline + } + t.timer.SetRead() +} + +func (t *connectionTimer) Chan() <-chan time.Time { + return t.timer.Chan() +} + +// SetTimer resets the timer. +// It makes sure that the deadline is strictly increasing. +// This prevents busy-looping in cases where the timer fires, but we can't actually send out a packet. +// This doesn't apply to the pacing deadline, which can be set multiple times to deadlineSendImmediately. +func (t *connectionTimer) SetTimer(idleTimeoutOrKeepAlive, ackAlarm, lossTime, pacing time.Time) { + deadline := idleTimeoutOrKeepAlive + if !ackAlarm.IsZero() && ackAlarm.Before(deadline) && ackAlarm.After(t.last) { + deadline = ackAlarm + } + if !lossTime.IsZero() && lossTime.Before(deadline) && lossTime.After(t.last) { + deadline = lossTime + } + if !pacing.IsZero() && pacing.Before(deadline) { + deadline = pacing + } + t.timer.Reset(deadline) +} + +func (t *connectionTimer) Stop() { + t.timer.Stop() +} diff --git a/backend/vendor/github.com/enetx/uquic/crypto_stream.go b/backend/vendor/github.com/enetx/uquic/crypto_stream.go new file mode 100644 index 0000000..887387a --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/crypto_stream.go @@ -0,0 +1,106 @@ +package quic + +import ( + "fmt" + "io" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/wire" +) + +type cryptoStream interface { + // for receiving data + HandleCryptoFrame(*wire.CryptoFrame) error + GetCryptoData() []byte + Finish() error + // for sending data + io.Writer + HasData() bool + PopCryptoFrame(protocol.ByteCount) *wire.CryptoFrame +} + +type cryptoStreamImpl struct { + queue *frameSorter + msgBuf []byte + + highestOffset protocol.ByteCount + finished bool + + writeOffset protocol.ByteCount + writeBuf []byte +} + +func newCryptoStream() cryptoStream { + return &cryptoStreamImpl{queue: newFrameSorter()} +} + +func (s *cryptoStreamImpl) HandleCryptoFrame(f *wire.CryptoFrame) error { + highestOffset := f.Offset + protocol.ByteCount(len(f.Data)) + if maxOffset := highestOffset; maxOffset > protocol.MaxCryptoStreamOffset { + return &qerr.TransportError{ + ErrorCode: qerr.CryptoBufferExceeded, + ErrorMessage: fmt.Sprintf("received invalid offset %d on crypto stream, maximum allowed %d", maxOffset, protocol.MaxCryptoStreamOffset), + } + } + if s.finished { + if highestOffset > s.highestOffset { + // reject crypto data received after this stream was already finished + return &qerr.TransportError{ + ErrorCode: qerr.ProtocolViolation, + ErrorMessage: "received crypto data after change of encryption level", + } + } + // ignore data with a smaller offset than the highest received + // could e.g. be a retransmission + return nil + } + s.highestOffset = max(s.highestOffset, highestOffset) + if err := s.queue.Push(f.Data, f.Offset, nil); err != nil { + return err + } + for { + _, data, _ := s.queue.Pop() + if data == nil { + return nil + } + s.msgBuf = append(s.msgBuf, data...) + } +} + +// GetCryptoData retrieves data that was received in CRYPTO frames +func (s *cryptoStreamImpl) GetCryptoData() []byte { + b := s.msgBuf + s.msgBuf = nil + return b +} + +func (s *cryptoStreamImpl) Finish() error { + if s.queue.HasMoreData() { + return &qerr.TransportError{ + ErrorCode: qerr.ProtocolViolation, + ErrorMessage: "encryption level changed, but crypto stream has more data to read", + } + } + s.finished = true + return nil +} + +// Writes writes data that should be sent out in CRYPTO frames +func (s *cryptoStreamImpl) Write(p []byte) (int, error) { + s.writeBuf = append(s.writeBuf, p...) + return len(p), nil +} + +func (s *cryptoStreamImpl) HasData() bool { + return len(s.writeBuf) > 0 +} + +func (s *cryptoStreamImpl) PopCryptoFrame(maxLen protocol.ByteCount) *wire.CryptoFrame { + f := &wire.CryptoFrame{Offset: s.writeOffset} + n := min(f.MaxDataLen(maxLen), protocol.ByteCount(len(s.writeBuf))) + f.Data = s.writeBuf[:n] + s.writeBuf = s.writeBuf[n:] + s.writeOffset += n + return f +} diff --git a/backend/vendor/github.com/enetx/uquic/crypto_stream_manager.go b/backend/vendor/github.com/enetx/uquic/crypto_stream_manager.go new file mode 100644 index 0000000..661d566 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/crypto_stream_manager.go @@ -0,0 +1,82 @@ +package quic + +import ( + "fmt" + + "github.com/enetx/uquic/internal/handshake" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/wire" +) + +type cryptoDataHandler interface { + HandleMessage([]byte, protocol.EncryptionLevel) error + NextEvent() handshake.Event +} + +type cryptoStreamManager struct { + cryptoHandler cryptoDataHandler + + initialStream cryptoStream + handshakeStream cryptoStream + oneRTTStream cryptoStream +} + +func newCryptoStreamManager( + cryptoHandler cryptoDataHandler, + initialStream cryptoStream, + handshakeStream cryptoStream, + oneRTTStream cryptoStream, +) *cryptoStreamManager { + return &cryptoStreamManager{ + cryptoHandler: cryptoHandler, + initialStream: initialStream, + handshakeStream: handshakeStream, + oneRTTStream: oneRTTStream, + } +} + +func (m *cryptoStreamManager) HandleCryptoFrame(frame *wire.CryptoFrame, encLevel protocol.EncryptionLevel) error { + var str cryptoStream + //nolint:exhaustive // CRYPTO frames cannot be sent in 0-RTT packets. + switch encLevel { + case protocol.EncryptionInitial: + str = m.initialStream + case protocol.EncryptionHandshake: + str = m.handshakeStream + case protocol.Encryption1RTT: + str = m.oneRTTStream + default: + return fmt.Errorf("received CRYPTO frame with unexpected encryption level: %s", encLevel) + } + if err := str.HandleCryptoFrame(frame); err != nil { + return err + } + for { + data := str.GetCryptoData() + if data == nil { + return nil + } + if err := m.cryptoHandler.HandleMessage(data, encLevel); err != nil { + return err + } + } +} + +func (m *cryptoStreamManager) GetPostHandshakeData(maxSize protocol.ByteCount) *wire.CryptoFrame { + if !m.oneRTTStream.HasData() { + return nil + } + return m.oneRTTStream.PopCryptoFrame(maxSize) +} + +func (m *cryptoStreamManager) Drop(encLevel protocol.EncryptionLevel) error { + //nolint:exhaustive // 1-RTT keys should never get dropped. + switch encLevel { + case protocol.EncryptionInitial: + return m.initialStream.Finish() + case protocol.EncryptionHandshake: + return m.handshakeStream.Finish() + default: + panic(fmt.Sprintf("dropped unexpected encryption level: %s", encLevel)) + } +} diff --git a/backend/vendor/github.com/enetx/uquic/datagram_queue.go b/backend/vendor/github.com/enetx/uquic/datagram_queue.go new file mode 100644 index 0000000..d3a7263 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/datagram_queue.go @@ -0,0 +1,137 @@ +package quic + +import ( + "context" + "sync" + + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/internal/utils/ringbuffer" + "github.com/enetx/uquic/internal/wire" +) + +const ( + maxDatagramSendQueueLen = 32 + maxDatagramRcvQueueLen = 128 +) + +type datagramQueue struct { + sendMx sync.Mutex + sendQueue ringbuffer.RingBuffer[*wire.DatagramFrame] + sent chan struct{} // used to notify Add that a datagram was dequeued + + rcvMx sync.Mutex + rcvQueue [][]byte + rcvd chan struct{} // used to notify Receive that a new datagram was received + + closeErr error + closed chan struct{} + + hasData func() + + logger utils.Logger +} + +func newDatagramQueue(hasData func(), logger utils.Logger) *datagramQueue { + return &datagramQueue{ + hasData: hasData, + rcvd: make(chan struct{}, 1), + sent: make(chan struct{}, 1), + closed: make(chan struct{}), + logger: logger, + } +} + +// Add queues a new DATAGRAM frame for sending. +// Up to 32 DATAGRAM frames will be queued. +// Once that limit is reached, Add blocks until the queue size has reduced. +func (h *datagramQueue) Add(f *wire.DatagramFrame) error { + h.sendMx.Lock() + + for { + if h.sendQueue.Len() < maxDatagramSendQueueLen { + h.sendQueue.PushBack(f) + h.sendMx.Unlock() + h.hasData() + return nil + } + select { + case <-h.sent: // drain the queue so we don't loop immediately + default: + } + h.sendMx.Unlock() + select { + case <-h.closed: + return h.closeErr + case <-h.sent: + } + h.sendMx.Lock() + } +} + +// Peek gets the next DATAGRAM frame for sending. +// If actually sent out, Pop needs to be called before the next call to Peek. +func (h *datagramQueue) Peek() *wire.DatagramFrame { + h.sendMx.Lock() + defer h.sendMx.Unlock() + if h.sendQueue.Empty() { + return nil + } + return h.sendQueue.PeekFront() +} + +func (h *datagramQueue) Pop() { + h.sendMx.Lock() + defer h.sendMx.Unlock() + _ = h.sendQueue.PopFront() + select { + case h.sent <- struct{}{}: + default: + } +} + +// HandleDatagramFrame handles a received DATAGRAM frame. +func (h *datagramQueue) HandleDatagramFrame(f *wire.DatagramFrame) { + data := make([]byte, len(f.Data)) + copy(data, f.Data) + var queued bool + h.rcvMx.Lock() + if len(h.rcvQueue) < maxDatagramRcvQueueLen { + h.rcvQueue = append(h.rcvQueue, data) + queued = true + select { + case h.rcvd <- struct{}{}: + default: + } + } + h.rcvMx.Unlock() + if !queued && h.logger.Debug() { + h.logger.Debugf("Discarding received DATAGRAM frame (%d bytes payload)", len(f.Data)) + } +} + +// Receive gets a received DATAGRAM frame. +func (h *datagramQueue) Receive(ctx context.Context) ([]byte, error) { + for { + h.rcvMx.Lock() + if len(h.rcvQueue) > 0 { + data := h.rcvQueue[0] + h.rcvQueue = h.rcvQueue[1:] + h.rcvMx.Unlock() + return data, nil + } + h.rcvMx.Unlock() + select { + case <-h.rcvd: + continue + case <-h.closed: + return nil, h.closeErr + case <-ctx.Done(): + return nil, ctx.Err() + } + } +} + +func (h *datagramQueue) CloseWithError(e error) { + h.closeErr = e + close(h.closed) +} diff --git a/backend/vendor/github.com/enetx/uquic/errors.go b/backend/vendor/github.com/enetx/uquic/errors.go new file mode 100644 index 0000000..c73b0be --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/errors.go @@ -0,0 +1,75 @@ +package quic + +import ( + "fmt" + + "github.com/enetx/uquic/internal/qerr" +) + +type ( + TransportError = qerr.TransportError + ApplicationError = qerr.ApplicationError + VersionNegotiationError = qerr.VersionNegotiationError + StatelessResetError = qerr.StatelessResetError + IdleTimeoutError = qerr.IdleTimeoutError + HandshakeTimeoutError = qerr.HandshakeTimeoutError +) + +type ( + TransportErrorCode = qerr.TransportErrorCode + ApplicationErrorCode = qerr.ApplicationErrorCode + StreamErrorCode = qerr.StreamErrorCode +) + +const ( + NoError = qerr.NoError + InternalError = qerr.InternalError + ConnectionRefused = qerr.ConnectionRefused + FlowControlError = qerr.FlowControlError + StreamLimitError = qerr.StreamLimitError + StreamStateError = qerr.StreamStateError + FinalSizeError = qerr.FinalSizeError + FrameEncodingError = qerr.FrameEncodingError + TransportParameterError = qerr.TransportParameterError + ConnectionIDLimitError = qerr.ConnectionIDLimitError + ProtocolViolation = qerr.ProtocolViolation + InvalidToken = qerr.InvalidToken + ApplicationErrorErrorCode = qerr.ApplicationErrorErrorCode + CryptoBufferExceeded = qerr.CryptoBufferExceeded + KeyUpdateError = qerr.KeyUpdateError + AEADLimitReached = qerr.AEADLimitReached + NoViablePathError = qerr.NoViablePathError +) + +// A StreamError is used for Stream.CancelRead and Stream.CancelWrite. +// It is also returned from Stream.Read and Stream.Write if the peer canceled reading or writing. +type StreamError struct { + StreamID StreamID + ErrorCode StreamErrorCode + Remote bool +} + +func (e *StreamError) Is(target error) bool { + _, ok := target.(*StreamError) + return ok +} + +func (e *StreamError) Error() string { + pers := "local" + if e.Remote { + pers = "remote" + } + return fmt.Sprintf("stream %d canceled by %s with error code %d", e.StreamID, pers, e.ErrorCode) +} + +// DatagramTooLargeError is returned from Connection.SendDatagram if the payload is too large to be sent. +type DatagramTooLargeError struct { + PeerMaxDatagramFrameSize int64 +} + +func (e *DatagramTooLargeError) Is(target error) bool { + _, ok := target.(*DatagramTooLargeError) + return ok +} + +func (e *DatagramTooLargeError) Error() string { return "DATAGRAM frame too large" } diff --git a/backend/vendor/github.com/enetx/uquic/frame_sorter.go b/backend/vendor/github.com/enetx/uquic/frame_sorter.go new file mode 100644 index 0000000..3ee4cc4 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/frame_sorter.go @@ -0,0 +1,237 @@ +package quic + +import ( + "errors" + "sync" + + "github.com/enetx/uquic/internal/protocol" + list "github.com/enetx/uquic/internal/utils/linkedlist" +) + +// byteInterval is an interval from one ByteCount to the other +type byteInterval struct { + Start protocol.ByteCount + End protocol.ByteCount +} + +var byteIntervalElementPool sync.Pool + +func init() { + byteIntervalElementPool = *list.NewPool[byteInterval]() +} + +type frameSorterEntry struct { + Data []byte + DoneCb func() +} + +type frameSorter struct { + queue map[protocol.ByteCount]frameSorterEntry + readPos protocol.ByteCount + gaps *list.List[byteInterval] +} + +var errDuplicateStreamData = errors.New("duplicate stream data") + +func newFrameSorter() *frameSorter { + s := frameSorter{ + gaps: list.NewWithPool[byteInterval](&byteIntervalElementPool), + queue: make(map[protocol.ByteCount]frameSorterEntry), + } + s.gaps.PushFront(byteInterval{Start: 0, End: protocol.MaxByteCount}) + return &s +} + +func (s *frameSorter) Push(data []byte, offset protocol.ByteCount, doneCb func()) error { + err := s.push(data, offset, doneCb) + if err == errDuplicateStreamData { + if doneCb != nil { + doneCb() + } + return nil + } + return err +} + +func (s *frameSorter) push(data []byte, offset protocol.ByteCount, doneCb func()) error { + if len(data) == 0 { + return errDuplicateStreamData + } + + start := offset + end := offset + protocol.ByteCount(len(data)) + + if end <= s.gaps.Front().Value.Start { + return errDuplicateStreamData + } + + startGap, startsInGap := s.findStartGap(start) + endGap, endsInGap := s.findEndGap(startGap, end) + + startGapEqualsEndGap := startGap == endGap + + if (startGapEqualsEndGap && end <= startGap.Value.Start) || + (!startGapEqualsEndGap && startGap.Value.End >= endGap.Value.Start && end <= startGap.Value.Start) { + return errDuplicateStreamData + } + + startGapNext := startGap.Next() + startGapEnd := startGap.Value.End // save it, in case startGap is modified + endGapStart := endGap.Value.Start // save it, in case endGap is modified + endGapEnd := endGap.Value.End // save it, in case endGap is modified + var adjustedStartGapEnd bool + var wasCut bool + + pos := start + var hasReplacedAtLeastOne bool + for { + oldEntry, ok := s.queue[pos] + if !ok { + break + } + oldEntryLen := protocol.ByteCount(len(oldEntry.Data)) + if end-pos > oldEntryLen || (hasReplacedAtLeastOne && end-pos == oldEntryLen) { + // The existing frame is shorter than the new frame. Replace it. + delete(s.queue, pos) + pos += oldEntryLen + hasReplacedAtLeastOne = true + if oldEntry.DoneCb != nil { + oldEntry.DoneCb() + } + } else { + if !hasReplacedAtLeastOne { + return errDuplicateStreamData + } + // The existing frame is longer than the new frame. + // Cut the new frame such that the end aligns with the start of the existing frame. + data = data[:pos-start] + end = pos + wasCut = true + break + } + } + + if !startsInGap && !hasReplacedAtLeastOne { + // cut the frame, such that it starts at the start of the gap + data = data[startGap.Value.Start-start:] + start = startGap.Value.Start + wasCut = true + } + if start <= startGap.Value.Start { + if end >= startGap.Value.End { + // The frame covers the whole startGap. Delete the gap. + s.gaps.Remove(startGap) + } else { + startGap.Value.Start = end + } + } else if !hasReplacedAtLeastOne { + startGap.Value.End = start + adjustedStartGapEnd = true + } + + if !startGapEqualsEndGap { + s.deleteConsecutive(startGapEnd) + var nextGap *list.Element[byteInterval] + for gap := startGapNext; gap.Value.End < endGapStart; gap = nextGap { + nextGap = gap.Next() + s.deleteConsecutive(gap.Value.End) + s.gaps.Remove(gap) + } + } + + if !endsInGap && start != endGapEnd && end > endGapEnd { + // cut the frame, such that it ends at the end of the gap + data = data[:endGapEnd-start] + end = endGapEnd + wasCut = true + } + if end == endGapEnd { + if !startGapEqualsEndGap { + // The frame covers the whole endGap. Delete the gap. + s.gaps.Remove(endGap) + } + } else { + if startGapEqualsEndGap && adjustedStartGapEnd { + // The frame split the existing gap into two. + s.gaps.InsertAfter(byteInterval{Start: end, End: startGapEnd}, startGap) + } else if !startGapEqualsEndGap { + endGap.Value.Start = end + } + } + + if wasCut && len(data) < protocol.MinStreamFrameBufferSize { + newData := make([]byte, len(data)) + copy(newData, data) + data = newData + if doneCb != nil { + doneCb() + doneCb = nil + } + } + + if s.gaps.Len() > protocol.MaxStreamFrameSorterGaps { + return errors.New("too many gaps in received data") + } + + s.queue[start] = frameSorterEntry{Data: data, DoneCb: doneCb} + return nil +} + +func (s *frameSorter) findStartGap(offset protocol.ByteCount) (*list.Element[byteInterval], bool) { + for gap := s.gaps.Front(); gap != nil; gap = gap.Next() { + if offset >= gap.Value.Start && offset <= gap.Value.End { + return gap, true + } + if offset < gap.Value.Start { + return gap, false + } + } + panic("no gap found") +} + +func (s *frameSorter) findEndGap(startGap *list.Element[byteInterval], offset protocol.ByteCount) (*list.Element[byteInterval], bool) { + for gap := startGap; gap != nil; gap = gap.Next() { + if offset >= gap.Value.Start && offset < gap.Value.End { + return gap, true + } + if offset < gap.Value.Start { + return gap.Prev(), false + } + } + panic("no gap found") +} + +// deleteConsecutive deletes consecutive frames from the queue, starting at pos +func (s *frameSorter) deleteConsecutive(pos protocol.ByteCount) { + for { + oldEntry, ok := s.queue[pos] + if !ok { + break + } + oldEntryLen := protocol.ByteCount(len(oldEntry.Data)) + delete(s.queue, pos) + if oldEntry.DoneCb != nil { + oldEntry.DoneCb() + } + pos += oldEntryLen + } +} + +func (s *frameSorter) Pop() (protocol.ByteCount, []byte, func()) { + entry, ok := s.queue[s.readPos] + if !ok { + return s.readPos, nil, nil + } + delete(s.queue, s.readPos) + offset := s.readPos + s.readPos += protocol.ByteCount(len(entry.Data)) + if s.gaps.Front().Value.End <= s.readPos { + panic("frame sorter BUG: read position higher than a gap") + } + return offset, entry.Data, entry.DoneCb +} + +// HasMoreData says if there is any more data queued at *any* offset. +func (s *frameSorter) HasMoreData() bool { + return len(s.queue) > 0 +} diff --git a/backend/vendor/github.com/enetx/uquic/framer.go b/backend/vendor/github.com/enetx/uquic/framer.go new file mode 100644 index 0000000..a75d2ed --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/framer.go @@ -0,0 +1,210 @@ +package quic + +import ( + "errors" + "sync" + + "github.com/enetx/uquic/internal/ackhandler" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils/ringbuffer" + "github.com/enetx/uquic/internal/wire" + "github.com/enetx/uquic/quicvarint" +) + +type framer interface { + HasData() bool + + QueueControlFrame(wire.Frame) + AppendControlFrames([]ackhandler.Frame, protocol.ByteCount, protocol.Version) ([]ackhandler.Frame, protocol.ByteCount) + + AddActiveStream(protocol.StreamID) + AppendStreamFrames([]ackhandler.StreamFrame, protocol.ByteCount, protocol.Version) ([]ackhandler.StreamFrame, protocol.ByteCount) + + Handle0RTTRejection() error + + // QueuedTooManyControlFrames says if the control frame queue exceeded its maximum queue length. + // This is a hack. + // It is easier to implement than propagating an error return value in QueueControlFrame. + // The correct solution would be to queue frames with their respective structs. + // See https://github.com/quic-go/quic-go/issues/4271 for the queueing of stream-related control frames. + QueuedTooManyControlFrames() bool +} + +const ( + maxPathResponses = 256 + maxControlFrames = 16 << 10 +) + +type framerI struct { + mutex sync.Mutex + + streamGetter streamGetter + + activeStreams map[protocol.StreamID]struct{} + streamQueue ringbuffer.RingBuffer[protocol.StreamID] + + controlFrameMutex sync.Mutex + controlFrames []wire.Frame + pathResponses []*wire.PathResponseFrame + queuedTooManyControlFrames bool +} + +var _ framer = &framerI{} + +func newFramer(streamGetter streamGetter) framer { + return &framerI{ + streamGetter: streamGetter, + activeStreams: make(map[protocol.StreamID]struct{}), + } +} + +func (f *framerI) HasData() bool { + f.mutex.Lock() + hasData := !f.streamQueue.Empty() + f.mutex.Unlock() + if hasData { + return true + } + f.controlFrameMutex.Lock() + defer f.controlFrameMutex.Unlock() + return len(f.controlFrames) > 0 || len(f.pathResponses) > 0 +} + +func (f *framerI) QueueControlFrame(frame wire.Frame) { + f.controlFrameMutex.Lock() + defer f.controlFrameMutex.Unlock() + + if pr, ok := frame.(*wire.PathResponseFrame); ok { + // Only queue up to maxPathResponses PATH_RESPONSE frames. + // This limit should be high enough to never be hit in practice, + // unless the peer is doing something malicious. + if len(f.pathResponses) >= maxPathResponses { + return + } + f.pathResponses = append(f.pathResponses, pr) + return + } + // This is a hack. + if len(f.controlFrames) >= maxControlFrames { + f.queuedTooManyControlFrames = true + return + } + f.controlFrames = append(f.controlFrames, frame) +} + +func (f *framerI) AppendControlFrames(frames []ackhandler.Frame, maxLen protocol.ByteCount, v protocol.Version) ([]ackhandler.Frame, protocol.ByteCount) { + f.controlFrameMutex.Lock() + defer f.controlFrameMutex.Unlock() + + var length protocol.ByteCount + // add a PATH_RESPONSE first, but only pack a single PATH_RESPONSE per packet + if len(f.pathResponses) > 0 { + frame := f.pathResponses[0] + frameLen := frame.Length(v) + if frameLen <= maxLen { + frames = append(frames, ackhandler.Frame{Frame: frame}) + length += frameLen + f.pathResponses = f.pathResponses[1:] + } + } + + for len(f.controlFrames) > 0 { + frame := f.controlFrames[len(f.controlFrames)-1] + frameLen := frame.Length(v) + if length+frameLen > maxLen { + break + } + frames = append(frames, ackhandler.Frame{Frame: frame}) + length += frameLen + f.controlFrames = f.controlFrames[:len(f.controlFrames)-1] + } + return frames, length +} + +func (f *framerI) QueuedTooManyControlFrames() bool { + return f.queuedTooManyControlFrames +} + +func (f *framerI) AddActiveStream(id protocol.StreamID) { + f.mutex.Lock() + if _, ok := f.activeStreams[id]; !ok { + f.streamQueue.PushBack(id) + f.activeStreams[id] = struct{}{} + } + f.mutex.Unlock() +} + +func (f *framerI) AppendStreamFrames(frames []ackhandler.StreamFrame, maxLen protocol.ByteCount, v protocol.Version) ([]ackhandler.StreamFrame, protocol.ByteCount) { + startLen := len(frames) + var length protocol.ByteCount + f.mutex.Lock() + // pop STREAM frames, until less than MinStreamFrameSize bytes are left in the packet + numActiveStreams := f.streamQueue.Len() + for i := 0; i < numActiveStreams; i++ { + if protocol.MinStreamFrameSize+length > maxLen { + break + } + id := f.streamQueue.PopFront() + // This should never return an error. Better check it anyway. + // The stream will only be in the streamQueue, if it enqueued itself there. + str, err := f.streamGetter.GetOrOpenSendStream(id) + // The stream can be nil if it completed after it said it had data. + if str == nil || err != nil { + delete(f.activeStreams, id) + continue + } + remainingLen := maxLen - length + // For the last STREAM frame, we'll remove the DataLen field later. + // Therefore, we can pretend to have more bytes available when popping + // the STREAM frame (which will always have the DataLen set). + remainingLen += quicvarint.Len(uint64(remainingLen)) + frame, ok, hasMoreData := str.popStreamFrame(remainingLen, v) + if hasMoreData { // put the stream back in the queue (at the end) + f.streamQueue.PushBack(id) + } else { // no more data to send. Stream is not active + delete(f.activeStreams, id) + } + // The frame can be "nil" + // * if the receiveStream was canceled after it said it had data + // * the remaining size doesn't allow us to add another STREAM frame + if !ok { + continue + } + frames = append(frames, frame) + length += frame.Frame.Length(v) + } + f.mutex.Unlock() + if len(frames) > startLen { + l := frames[len(frames)-1].Frame.Length(v) + // account for the smaller size of the last STREAM frame + frames[len(frames)-1].Frame.DataLenPresent = false + length += frames[len(frames)-1].Frame.Length(v) - l + } + return frames, length +} + +func (f *framerI) Handle0RTTRejection() error { + f.mutex.Lock() + defer f.mutex.Unlock() + + f.controlFrameMutex.Lock() + f.streamQueue.Clear() + for id := range f.activeStreams { + delete(f.activeStreams, id) + } + var j int + for i, frame := range f.controlFrames { + switch frame.(type) { + case *wire.MaxDataFrame, *wire.MaxStreamDataFrame, *wire.MaxStreamsFrame: + return errors.New("didn't expect MAX_DATA / MAX_STREAM_DATA / MAX_STREAMS frame to be sent in 0-RTT") + case *wire.DataBlockedFrame, *wire.StreamDataBlockedFrame, *wire.StreamsBlockedFrame: + continue + default: + f.controlFrames[j] = f.controlFrames[i] + j++ + } + } + f.controlFrames = f.controlFrames[:j] + f.controlFrameMutex.Unlock() + return nil +} diff --git a/backend/vendor/github.com/enetx/uquic/http3/README.md b/backend/vendor/github.com/enetx/uquic/http3/README.md new file mode 100644 index 0000000..a612851 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/README.md @@ -0,0 +1,104 @@ +# HTTP/3 + +[![PkgGoDev](https://pkg.go.dev/badge/github.com/quic-go/quic-go/http3)](https://pkg.go.dev/github.com/quic-go/quic-go/http3) + +This package implements HTTP/3 ([RFC 9114](https://datatracker.ietf.org/doc/html/rfc9114)), including QPACK ([RFC 9204](https://datatracker.ietf.org/doc/html/rfc9204)). +It aims to provide feature parity with the standard library's HTTP/1.1 and HTTP/2 implementation. + +## Serving HTTP/3 + +The easiest way to start an HTTP/3 server is using +```go +mux := http.NewServeMux() +// ... add HTTP handlers to mux ... +// If mux is nil, the http.DefaultServeMux is used. +http3.ListenAndServeQUIC("0.0.0.0:443", "/path/to/cert", "/path/to/key", mux) +``` + +`ListenAndServeQUIC` is a convenience function. For more configurability, set up an `http3.Server` explicitly: +```go +server := http3.Server{ + Handler: mux, + Addr: "0.0.0.0:443", + TLSConfig: http3.ConfigureTLSConfig(&tls.Config{}), // use your tls.Config here + QuicConfig: &quic.Config{}, +} +err := server.ListenAndServe() +``` + +The `http3.Server` provides a number of configuration options, please refer to the [documentation](https://pkg.go.dev/github.com/quic-go/quic-go/http3#Server) for a complete list. The `QuicConfig` is used to configure the underlying QUIC connection. More details can be found in the documentation of the QUIC package. + +It is also possible to manually set up a `quic.Transport`, and then pass the listener to the server. This is useful when you want to set configuration options on the `quic.Transport`. +```go +tr := quic.Transport{Conn: conn} +tlsConf := http3.ConfigureTLSConfig(&tls.Config{}) // use your tls.Config here +quicConf := &quic.Config{} // QUIC connection options +server := http3.Server{} +ln, _ := tr.ListenEarly(tlsConf, quicConf) +server.ServeListener(ln) +``` + +Alternatively, it is also possible to pass fully established QUIC connections to the HTTP/3 server. This is useful if the QUIC server offers multiple ALPNs (via `NextProtos` in the `tls.Config`). +```go +tr := quic.Transport{Conn: conn} +tlsConf := http3.ConfigureTLSConfig(&tls.Config{}) // use your tls.Config here +quicConf := &quic.Config{} // QUIC connection options +server := http3.Server{} +// alternatively, use tr.ListenEarly to accept 0-RTT connections +ln, _ := tr.Listen(tlsConf, quicConf) +for { + c, _ := ln.Accept() + switch c.ConnectionState().TLS.NegotiatedProtocol { + case http3.NextProtoH3: + go server.ServeQUICConn(c) + // ... handle other protocols ... + } +} +``` + +## Dialing HTTP/3 + +This package provides a `http.RoundTripper` implementation that can be used on the `http.Client`: + +```go +&http3.RoundTripper{ + TLSClientConfig: &tls.Config{}, // set a TLS client config, if desired + QuicConfig: &quic.Config{}, // QUIC connection options +} +defer roundTripper.Close() +client := &http.Client{ + Transport: roundTripper, +} +``` + +The `http3.RoundTripper` provides a number of configuration options, please refer to the [documentation](https://pkg.go.dev/github.com/quic-go/quic-go/http3#RoundTripper) for a complete list. + +To use a custom `quic.Transport`, the function used to dial new QUIC connections can be configured: +```go +tr := quic.Transport{} +roundTripper := &http3.RoundTripper{ + TLSClientConfig: &tls.Config{}, // set a TLS client config, if desired + QuicConfig: &quic.Config{}, // QUIC connection options + Dial: func(ctx context.Context, addr string, tlsConf *tls.Config, quicConf *quic.Config) (quic.EarlyConnection, error) { + a, err := net.ResolveUDPAddr("udp", addr) + if err != nil { + return nil, err + } + return tr.DialEarly(ctx, a, tlsConf, quicConf) + }, +} +``` + +## Using the same UDP Socket for Server and Roundtripper + +Since QUIC demultiplexes packets based on their connection IDs, it is possible allows running a QUIC server and client on the same UDP socket. This also works when using HTTP/3: HTTP requests can be sent from the same socket that a server is listening on. + +To achieve this using this package, first initialize a single `quic.Transport`, and pass a `quic.EarlyListner` obtained from that transport to `http3.Server.ServeListener`, and use the `DialEarly` function of the transport as the `Dial` function for the `http3.RoundTripper`. + +## QPACK + +HTTP/3 utilizes QPACK ([RFC 9204](https://datatracker.ietf.org/doc/html/rfc9204)) for efficient HTTP header field compression. Our implementation, available at[quic-go/qpack](https://github.com/quic-go/qpack), provides a minimal implementation of the protocol. + +While the current implementation is a fully interoperable implementation of the QPACK protocol, it only uses the static compression table. The dynamic table would allow for more effective compression of frequently transmitted header fields. This can be particularly beneficial in scenarios where headers have considerable redundancy or in high-throughput environments. + +If you think that your application would benefit from higher compression efficiency, or if you're interested in contributing improvements here, please let us know in [#2424](https://github.com/quic-go/quic-go/issues/2424). diff --git a/backend/vendor/github.com/enetx/uquic/http3/body.go b/backend/vendor/github.com/enetx/uquic/http3/body.go new file mode 100644 index 0000000..8844908 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/body.go @@ -0,0 +1,136 @@ +package http3 + +import ( + "context" + "io" + "net" + + quic "github.com/enetx/uquic" +) + +// The HTTPStreamer allows taking over a HTTP/3 stream. The interface is implemented by: +// * for the server: the http.Request.Body +// * for the client: the http.Response.Body +// On the client side, the stream will be closed for writing, unless the DontCloseRequestStream RoundTripOpt was set. +// When a stream is taken over, it's the caller's responsibility to close the stream. +type HTTPStreamer interface { + HTTPStream() Stream +} + +type StreamCreator interface { + // Context returns a context that is cancelled when the underlying connection is closed. + Context() context.Context + OpenStream() (quic.Stream, error) + OpenStreamSync(context.Context) (quic.Stream, error) + OpenUniStream() (quic.SendStream, error) + OpenUniStreamSync(context.Context) (quic.SendStream, error) + LocalAddr() net.Addr + RemoteAddr() net.Addr + ConnectionState() quic.ConnectionState +} + +var _ StreamCreator = quic.Connection(nil) + +// A Hijacker allows hijacking of the stream creating part of a quic.Session from a http.Response.Body. +// It is used by WebTransport to create WebTransport streams after a session has been established. +type Hijacker interface { + StreamCreator() StreamCreator +} + +// The body of a http.Request or http.Response. +type body struct { + str quic.Stream + + wasHijacked bool // set when HTTPStream is called +} + +var ( + _ io.ReadCloser = &body{} + _ HTTPStreamer = &body{} +) + +func newRequestBody(str Stream) *body { + return &body{str: str} +} + +func (r *body) HTTPStream() Stream { + r.wasHijacked = true + return r.str +} + +func (r *body) wasStreamHijacked() bool { + return r.wasHijacked +} + +func (r *body) Read(b []byte) (int, error) { + n, err := r.str.Read(b) + return n, maybeReplaceError(err) +} + +func (r *body) Close() error { + r.str.CancelRead(quic.StreamErrorCode(ErrCodeRequestCanceled)) + return nil +} + +type hijackableBody struct { + body + conn quic.Connection // only needed to implement Hijacker + + // only set for the http.Response + // The channel is closed when the user is done with this response: + // either when Read() errors, or when Close() is called. + reqDone chan<- struct{} + reqDoneClosed bool +} + +var ( + _ Hijacker = &hijackableBody{} + _ HTTPStreamer = &hijackableBody{} +) + +func newResponseBody(str Stream, conn quic.Connection, done chan<- struct{}) *hijackableBody { + return &hijackableBody{ + body: body{ + str: str, + }, + reqDone: done, + conn: conn, + } +} + +func (r *hijackableBody) StreamCreator() StreamCreator { + return r.conn +} + +func (r *hijackableBody) Read(b []byte) (int, error) { + n, err := r.str.Read(b) + if err != nil { + r.requestDone() + } + return n, maybeReplaceError(err) +} + +func (r *hijackableBody) requestDone() { + if r.reqDoneClosed || r.reqDone == nil { + return + } + if r.reqDone != nil { + close(r.reqDone) + } + r.reqDoneClosed = true +} + +func (r *body) StreamID() quic.StreamID { + return r.str.StreamID() +} + +func (r *hijackableBody) Close() error { + r.requestDone() + // If the EOF was read, CancelRead() is a no-op. + r.str.CancelRead(quic.StreamErrorCode(ErrCodeRequestCanceled)) + return nil +} + +func (r *hijackableBody) HTTPStream() Stream { + return r.str +} diff --git a/backend/vendor/github.com/enetx/uquic/http3/capsule.go b/backend/vendor/github.com/enetx/uquic/http3/capsule.go new file mode 100644 index 0000000..9a07aba --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/capsule.go @@ -0,0 +1,55 @@ +package http3 + +import ( + "io" + + "github.com/enetx/uquic/quicvarint" +) + +// CapsuleType is the type of the capsule. +type CapsuleType uint64 + +type exactReader struct { + R *io.LimitedReader +} + +func (r *exactReader) Read(b []byte) (int, error) { + n, err := r.R.Read(b) + if r.R.N > 0 { + return n, io.ErrUnexpectedEOF + } + return n, err +} + +// ParseCapsule parses the header of a Capsule. +// It returns an io.LimitedReader that can be used to read the Capsule value. +// The Capsule value must be read entirely (i.e. until the io.EOF) before using r again. +func ParseCapsule(r quicvarint.Reader) (CapsuleType, io.Reader, error) { + ct, err := quicvarint.Read(r) + if err != nil { + if err == io.EOF { + return 0, nil, io.ErrUnexpectedEOF + } + return 0, nil, err + } + l, err := quicvarint.Read(r) + if err != nil { + if err == io.EOF { + return 0, nil, io.ErrUnexpectedEOF + } + return 0, nil, err + } + return CapsuleType(ct), &exactReader{R: io.LimitReader(r, int64(l)).(*io.LimitedReader)}, nil +} + +// WriteCapsule writes a capsule +func WriteCapsule(w quicvarint.Writer, ct CapsuleType, value []byte) error { + b := make([]byte, 0, 16) + b = quicvarint.Append(b, uint64(ct)) + b = quicvarint.Append(b, uint64(len(value))) + if _, err := w.Write(b); err != nil { + return err + } + _, err := w.Write(value) + return err +} diff --git a/backend/vendor/github.com/enetx/uquic/http3/client.go b/backend/vendor/github.com/enetx/uquic/http3/client.go new file mode 100644 index 0000000..267ea68 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/client.go @@ -0,0 +1,539 @@ +package http3 + +import ( + "context" + "errors" + "fmt" + "io" + "net" + "github.com/enetx/http" + "strconv" + "sync" + "sync/atomic" + "time" + + ctls "crypto/tls" + + tls "github.com/enetx/utls" + + quic "github.com/enetx/uquic" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/quicvarint" + + "github.com/quic-go/qpack" +) + +// MethodGet0RTT allows a GET request to be sent using 0-RTT. +// Note that 0-RTT data doesn't provide replay protection. +const MethodGet0RTT = "GET_0RTT" + +const ( + defaultUserAgent = "quic-go HTTP/3" + defaultMaxResponseHeaderBytes = 10 * 1 << 20 // 10 MB +) + +var defaultQuicConfig = &quic.Config{ + MaxIncomingStreams: -1, // don't allow the server to create bidirectional streams + KeepAlivePeriod: 10 * time.Second, +} + +type dialFunc func(ctx context.Context, addr string, tlsCfg *tls.Config, cfg *quic.Config) (quic.EarlyConnection, error) + +var dialAddr dialFunc = quic.DialAddrEarly + +type roundTripperOpts struct { + DisableCompression bool + EnableDatagram bool + MaxHeaderBytes int64 + AdditionalSettings map[uint64]uint64 + StreamHijacker func(FrameType, quic.Connection, quic.Stream, error) (hijacked bool, err error) + UniStreamHijacker func(StreamType, quic.Connection, quic.ReceiveStream, error) (hijacked bool) +} + +// client is a HTTP3 client doing requests +type client struct { + tlsConf *tls.Config + config *quic.Config + opts *roundTripperOpts + + dialOnce sync.Once + dialer dialFunc + handshakeErr error + + receivedSettings chan struct{} // closed once the server's SETTINGS frame was processed + settings *Settings // set once receivedSettings is closed + + requestWriter *requestWriter + + decoder *qpack.Decoder + + hostname string + conn atomic.Pointer[quic.EarlyConnection] + + logger utils.Logger +} + +var _ roundTripCloser = &client{} + +func newClient(hostname string, tlsConf *tls.Config, opts *roundTripperOpts, conf *quic.Config, dialer dialFunc) (roundTripCloser, error) { + if conf == nil { + conf = defaultQuicConfig.Clone() + conf.EnableDatagrams = opts.EnableDatagram + } + if opts.EnableDatagram && !conf.EnableDatagrams { + return nil, errors.New("HTTP Datagrams enabled, but QUIC Datagrams disabled") + } + if len(conf.Versions) == 0 { + conf = conf.Clone() + conf.Versions = []quic.Version{protocol.SupportedVersions[0]} + } + if len(conf.Versions) != 1 { + return nil, errors.New("can only use a single QUIC version for dialing a HTTP/3 connection") + } + if conf.MaxIncomingStreams == 0 { + conf.MaxIncomingStreams = -1 // don't allow any bidirectional streams + } + logger := utils.DefaultLogger.WithPrefix("h3 client") + + if tlsConf == nil { + tlsConf = &tls.Config{} + } else { + tlsConf = tlsConf.Clone() + } + if tlsConf.ServerName == "" { + sni, _, err := net.SplitHostPort(hostname) + if err != nil { + // It's ok if net.SplitHostPort returns an error - it could be a hostname/IP address without a port. + sni = hostname + } + tlsConf.ServerName = sni + } + // Replace existing ALPNs by H3 + tlsConf.NextProtos = []string{versionToALPN(conf.Versions[0])} + + return &client{ + hostname: authorityAddr("https", hostname), + tlsConf: tlsConf, + requestWriter: newRequestWriter(logger), + receivedSettings: make(chan struct{}), + decoder: qpack.NewDecoder(func(hf qpack.HeaderField) {}), + config: conf, + opts: opts, + dialer: dialer, + logger: logger, + }, nil +} + +func (c *client) dial(ctx context.Context) error { + var err error + var conn quic.EarlyConnection + if c.dialer != nil { + conn, err = c.dialer(ctx, c.hostname, c.tlsConf, c.config) + } else { + conn, err = dialAddr(ctx, c.hostname, c.tlsConf, c.config) + } + if err != nil { + return err + } + c.conn.Store(&conn) + + // send the SETTINGs frame, using 0-RTT data, if possible + go func() { + if err := c.setupConn(conn); err != nil { + c.logger.Debugf("Setting up connection failed: %s", err) + conn.CloseWithError(quic.ApplicationErrorCode(ErrCodeInternalError), "") + } + }() + + if c.opts.StreamHijacker != nil { + go c.handleBidirectionalStreams(conn) + } + go c.handleUnidirectionalStreams(conn) + return nil +} + +func (c *client) setupConn(conn quic.EarlyConnection) error { + // open the control stream + str, err := conn.OpenUniStream() + if err != nil { + return err + } + b := make([]byte, 0, 64) + b = quicvarint.Append(b, streamTypeControlStream) + // send the SETTINGS frame + b = (&settingsFrame{Datagram: c.opts.EnableDatagram, Other: c.opts.AdditionalSettings}).Append(b) + _, err = str.Write(b) + return err +} + +func (c *client) handleBidirectionalStreams(conn quic.EarlyConnection) { + for { + str, err := conn.AcceptStream(context.Background()) + if err != nil { + c.logger.Debugf("accepting bidirectional stream failed: %s", err) + return + } + go func(str quic.Stream) { + _, err := parseNextFrame(str, func(ft FrameType, e error) (processed bool, err error) { + return c.opts.StreamHijacker(ft, conn, str, e) + }) + if err == errHijacked { + return + } + if err != nil { + c.logger.Debugf("error handling stream: %s", err) + } + conn.CloseWithError(quic.ApplicationErrorCode(ErrCodeFrameUnexpected), "received HTTP/3 frame on bidirectional stream") + }(str) + } +} + +func (c *client) handleUnidirectionalStreams(conn quic.EarlyConnection) { + var rcvdControlStream atomic.Bool + + for { + str, err := conn.AcceptUniStream(context.Background()) + if err != nil { + c.logger.Debugf("accepting unidirectional stream failed: %s", err) + return + } + + go func(str quic.ReceiveStream) { + streamType, err := quicvarint.Read(quicvarint.NewReader(str)) + if err != nil { + if c.opts.UniStreamHijacker != nil && c.opts.UniStreamHijacker(StreamType(streamType), conn, str, err) { + return + } + c.logger.Debugf("reading stream type on stream %d failed: %s", str.StreamID(), err) + return + } + // We're only interested in the control stream here. + switch streamType { + case streamTypeControlStream: + case streamTypeQPACKEncoderStream, streamTypeQPACKDecoderStream: + // Our QPACK implementation doesn't use the dynamic table yet. + // TODO: check that only one stream of each type is opened. + return + case streamTypePushStream: + // We never increased the Push ID, so we don't expect any push streams. + conn.CloseWithError(quic.ApplicationErrorCode(ErrCodeIDError), "") + return + default: + if c.opts.UniStreamHijacker != nil && c.opts.UniStreamHijacker(StreamType(streamType), conn, str, nil) { + return + } + str.CancelRead(quic.StreamErrorCode(ErrCodeStreamCreationError)) + return + } + // Only a single control stream is allowed. + if isFirstControlStr := rcvdControlStream.CompareAndSwap(false, true); !isFirstControlStr { + conn.CloseWithError(quic.ApplicationErrorCode(ErrCodeStreamCreationError), "duplicate control stream") + return + } + f, err := parseNextFrame(str, nil) + if err != nil { + conn.CloseWithError(quic.ApplicationErrorCode(ErrCodeFrameError), "") + return + } + sf, ok := f.(*settingsFrame) + if !ok { + conn.CloseWithError(quic.ApplicationErrorCode(ErrCodeMissingSettings), "") + return + } + c.settings = &Settings{ + EnableDatagram: sf.Datagram, + EnableExtendedConnect: sf.ExtendedConnect, + Other: sf.Other, + } + close(c.receivedSettings) + if !sf.Datagram { + return + } + // If datagram support was enabled on our side as well as on the server side, + // we can expect it to have been negotiated both on the transport and on the HTTP/3 layer. + // Note: ConnectionState() will block until the handshake is complete (relevant when using 0-RTT). + if c.opts.EnableDatagram && !conn.ConnectionState().SupportsDatagrams { + conn.CloseWithError(quic.ApplicationErrorCode(ErrCodeSettingsError), "missing QUIC Datagram support") + } + }(str) + } +} + +func (c *client) Close() error { + conn := c.conn.Load() + if conn == nil { + return nil + } + return (*conn).CloseWithError(quic.ApplicationErrorCode(ErrCodeNoError), "") +} + +func (c *client) maxHeaderBytes() uint64 { + if c.opts.MaxHeaderBytes <= 0 { + return defaultMaxResponseHeaderBytes + } + return uint64(c.opts.MaxHeaderBytes) +} + +// RoundTripOpt executes a request and returns a response +func (c *client) RoundTripOpt(req *http.Request, opt RoundTripOpt) (*http.Response, error) { + rsp, err := c.roundTripOpt(req, opt) + if err != nil && req.Context().Err() != nil { + // if the context was canceled, return the context cancellation error + err = req.Context().Err() + } + return rsp, err +} + +func (c *client) roundTripOpt(req *http.Request, opt RoundTripOpt) (*http.Response, error) { + if authorityAddr("https", hostnameFromRequest(req)) != c.hostname { + return nil, fmt.Errorf("http3 client BUG: RoundTripOpt called for the wrong client (expected %s, got %s)", c.hostname, req.Host) + } + + c.dialOnce.Do(func() { + c.handshakeErr = c.dial(req.Context()) + }) + if c.handshakeErr != nil { + return nil, c.handshakeErr + } + + // At this point, c.conn is guaranteed to be set. + conn := *c.conn.Load() + + // Immediately send out this request, if this is a 0-RTT request. + if req.Method == MethodGet0RTT { + req.Method = http.MethodGet + } else { + // wait for the handshake to complete + select { + case <-conn.HandshakeComplete(): + case <-req.Context().Done(): + return nil, req.Context().Err() + } + } + + if opt.CheckSettings != nil { + // wait for the server's SETTINGS frame to arrive + select { + case <-c.receivedSettings: + case <-conn.Context().Done(): + return nil, context.Cause(conn.Context()) + } + if err := opt.CheckSettings(*c.settings); err != nil { + return nil, err + } + } + + str, err := conn.OpenStreamSync(req.Context()) + if err != nil { + return nil, err + } + + // Request Cancellation: + // This go routine keeps running even after RoundTripOpt() returns. + // It is shut down when the application is done processing the body. + reqDone := make(chan struct{}) + done := make(chan struct{}) + go func() { + defer close(done) + select { + case <-req.Context().Done(): + str.CancelWrite(quic.StreamErrorCode(ErrCodeRequestCanceled)) + str.CancelRead(quic.StreamErrorCode(ErrCodeRequestCanceled)) + case <-reqDone: + } + }() + + doneChan := reqDone + if opt.DontCloseRequestStream { + doneChan = nil + } + rsp, rerr := c.doRequest(req, conn, str, opt, doneChan) + if rerr.err != nil { // if any error occurred + close(reqDone) + <-done + if rerr.streamErr != 0 { // if it was a stream error + str.CancelWrite(quic.StreamErrorCode(rerr.streamErr)) + } + if rerr.connErr != 0 { // if it was a connection error + var reason string + if rerr.err != nil { + reason = rerr.err.Error() + } + conn.CloseWithError(quic.ApplicationErrorCode(rerr.connErr), reason) + } + return nil, maybeReplaceError(rerr.err) + } + if opt.DontCloseRequestStream { + close(reqDone) + <-done + } + return rsp, maybeReplaceError(rerr.err) +} + +// cancelingReader reads from the io.Reader. +// It cancels writing on the stream if any error other than io.EOF occurs. +type cancelingReader struct { + r io.Reader + str Stream +} + +func (r *cancelingReader) Read(b []byte) (int, error) { + n, err := r.r.Read(b) + if err != nil && err != io.EOF { + r.str.CancelWrite(quic.StreamErrorCode(ErrCodeRequestCanceled)) + } + return n, err +} + +func (c *client) sendRequestBody(str Stream, body io.ReadCloser, contentLength int64) error { + defer body.Close() + buf := make([]byte, bodyCopyBufferSize) + sr := &cancelingReader{str: str, r: body} + if contentLength == -1 { + _, err := io.CopyBuffer(str, sr, buf) + return err + } + + // make sure we don't send more bytes than the content length + n, err := io.CopyBuffer(str, io.LimitReader(sr, contentLength), buf) + if err != nil { + return err + } + var extra int64 + extra, err = io.CopyBuffer(io.Discard, sr, buf) + n += extra + if n > contentLength { + str.CancelWrite(quic.StreamErrorCode(ErrCodeRequestCanceled)) + return fmt.Errorf("http: ContentLength=%d with Body length %d", contentLength, n) + } + return err +} + +func (c *client) doRequest(req *http.Request, conn quic.EarlyConnection, str quic.Stream, opt RoundTripOpt, reqDone chan<- struct{}) (*http.Response, requestError) { + var requestGzip bool + if !c.opts.DisableCompression && req.Method != "HEAD" && req.Header.Get("Accept-Encoding") == "" && req.Header.Get("Range") == "" { + requestGzip = true + } + if err := c.requestWriter.WriteRequestHeader(str, req, requestGzip); err != nil { + return nil, newStreamError(ErrCodeInternalError, err) + } + + if req.Body == nil && !opt.DontCloseRequestStream { + str.Close() + } + + hstr := newStream(str, func() { conn.CloseWithError(quic.ApplicationErrorCode(ErrCodeFrameUnexpected), "") }) + if req.Body != nil { + // send the request body asynchronously + go func() { + contentLength := int64(-1) + // According to the documentation for http.Request.ContentLength, + // a value of 0 with a non-nil Body is also treated as unknown content length. + if req.ContentLength > 0 { + contentLength = req.ContentLength + } + if err := c.sendRequestBody(hstr, req.Body, contentLength); err != nil { + c.logger.Errorf("Error writing request: %s", err) + } + if !opt.DontCloseRequestStream { + hstr.Close() + } + }() + } + + frame, err := parseNextFrame(str, nil) + if err != nil { + return nil, newStreamError(ErrCodeFrameError, err) + } + hf, ok := frame.(*headersFrame) + if !ok { + return nil, newConnError(ErrCodeFrameUnexpected, errors.New("expected first frame to be a HEADERS frame")) + } + if hf.Length > c.maxHeaderBytes() { + return nil, newStreamError(ErrCodeFrameError, fmt.Errorf("HEADERS frame too large: %d bytes (max: %d)", hf.Length, c.maxHeaderBytes())) + } + headerBlock := make([]byte, hf.Length) + if _, err := io.ReadFull(str, headerBlock); err != nil { + return nil, newStreamError(ErrCodeRequestIncomplete, err) + } + hfs, err := c.decoder.DecodeFull(headerBlock) + if err != nil { + // TODO: use the right error code + return nil, newConnError(ErrCodeGeneralProtocolError, err) + } + + res, err := responseFromHeaders(hfs) + if err != nil { + return nil, newStreamError(ErrCodeMessageError, err) + } + connState := conn.ConnectionState().TLS + + // [UQUIC] copy utls.ConnectionState to crypto/tls.ConnectionState + cryptoConnState := &ctls.ConnectionState{ + Version: connState.Version, + HandshakeComplete: connState.HandshakeComplete, + DidResume: connState.DidResume, + CipherSuite: connState.CipherSuite, + NegotiatedProtocol: connState.NegotiatedProtocol, + NegotiatedProtocolIsMutual: connState.NegotiatedProtocolIsMutual, + ServerName: connState.ServerName, + PeerCertificates: connState.PeerCertificates, + VerifiedChains: connState.VerifiedChains, + SignedCertificateTimestamps: connState.SignedCertificateTimestamps, + OCSPResponse: connState.OCSPResponse, + TLSUnique: connState.TLSUnique, + } + res.TLS = cryptoConnState + // [/UQUIC] + + res.Request = req + // Check that the server doesn't send more data in DATA frames than indicated by the Content-Length header (if set). + // See section 4.1.2 of RFC 9114. + var httpStr Stream + if _, ok := res.Header["Content-Length"]; ok && res.ContentLength >= 0 { + httpStr = newLengthLimitedStream(hstr, res.ContentLength) + } else { + httpStr = hstr + } + respBody := newResponseBody(httpStr, conn, reqDone) + + // Rules for when to set Content-Length are defined in https://tools.ietf.org/html/rfc7230#section-3.3.2. + _, hasTransferEncoding := res.Header["Transfer-Encoding"] + isInformational := res.StatusCode >= 100 && res.StatusCode < 200 + isNoContent := res.StatusCode == http.StatusNoContent + isSuccessfulConnect := req.Method == http.MethodConnect && res.StatusCode >= 200 && res.StatusCode < 300 + if !hasTransferEncoding && !isInformational && !isNoContent && !isSuccessfulConnect { + res.ContentLength = -1 + if clens, ok := res.Header["Content-Length"]; ok && len(clens) == 1 { + if clen64, err := strconv.ParseInt(clens[0], 10, 64); err == nil { + res.ContentLength = clen64 + } + } + } + + if requestGzip && res.Header.Get("Content-Encoding") == "gzip" { + res.Header.Del("Content-Encoding") + res.Header.Del("Content-Length") + res.ContentLength = -1 + res.Body = newGzipReader(respBody) + res.Uncompressed = true + } else { + res.Body = respBody + } + + return res, requestError{} +} + +func (c *client) HandshakeComplete() bool { + conn := c.conn.Load() + if conn == nil { + return false + } + select { + case <-(*conn).HandshakeComplete(): + return true + default: + return false + } +} diff --git a/backend/vendor/github.com/enetx/uquic/http3/error.go b/backend/vendor/github.com/enetx/uquic/http3/error.go new file mode 100644 index 0000000..f749a8d --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/error.go @@ -0,0 +1,58 @@ +package http3 + +import ( + "errors" + "fmt" + + quic "github.com/enetx/uquic" +) + +// Error is returned from the round tripper (for HTTP clients) +// and inside the HTTP handler (for HTTP servers) if an HTTP/3 error occurs. +// See section 8 of RFC 9114. +type Error struct { + Remote bool + ErrorCode ErrCode + ErrorMessage string +} + +var _ error = &Error{} + +func (e *Error) Error() string { + s := e.ErrorCode.string() + if s == "" { + s = fmt.Sprintf("H3 error (%#x)", uint64(e.ErrorCode)) + } + // Usually errors are remote. Only make it explicit for local errors. + if !e.Remote { + s += " (local)" + } + if e.ErrorMessage != "" { + s += ": " + e.ErrorMessage + } + return s +} + +func maybeReplaceError(err error) error { + if err == nil { + return nil + } + + var ( + e Error + strErr *quic.StreamError + appErr *quic.ApplicationError + ) + switch { + default: + return err + case errors.As(err, &strErr): + e.Remote = strErr.Remote + e.ErrorCode = ErrCode(strErr.ErrorCode) + case errors.As(err, &appErr): + e.Remote = appErr.Remote + e.ErrorCode = ErrCode(appErr.ErrorCode) + e.ErrorMessage = appErr.ErrorMessage + } + return &e +} diff --git a/backend/vendor/github.com/enetx/uquic/http3/error_codes.go b/backend/vendor/github.com/enetx/uquic/http3/error_codes.go new file mode 100644 index 0000000..4ace464 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/error_codes.go @@ -0,0 +1,81 @@ +package http3 + +import ( + "fmt" + + quic "github.com/enetx/uquic" +) + +type ErrCode quic.ApplicationErrorCode + +const ( + ErrCodeNoError ErrCode = 0x100 + ErrCodeGeneralProtocolError ErrCode = 0x101 + ErrCodeInternalError ErrCode = 0x102 + ErrCodeStreamCreationError ErrCode = 0x103 + ErrCodeClosedCriticalStream ErrCode = 0x104 + ErrCodeFrameUnexpected ErrCode = 0x105 + ErrCodeFrameError ErrCode = 0x106 + ErrCodeExcessiveLoad ErrCode = 0x107 + ErrCodeIDError ErrCode = 0x108 + ErrCodeSettingsError ErrCode = 0x109 + ErrCodeMissingSettings ErrCode = 0x10a + ErrCodeRequestRejected ErrCode = 0x10b + ErrCodeRequestCanceled ErrCode = 0x10c + ErrCodeRequestIncomplete ErrCode = 0x10d + ErrCodeMessageError ErrCode = 0x10e + ErrCodeConnectError ErrCode = 0x10f + ErrCodeVersionFallback ErrCode = 0x110 + ErrCodeDatagramError ErrCode = 0x33 +) + +func (e ErrCode) String() string { + s := e.string() + if s != "" { + return s + } + return fmt.Sprintf("unknown error code: %#x", uint16(e)) +} + +func (e ErrCode) string() string { + switch e { + case ErrCodeNoError: + return "H3_NO_ERROR" + case ErrCodeGeneralProtocolError: + return "H3_GENERAL_PROTOCOL_ERROR" + case ErrCodeInternalError: + return "H3_INTERNAL_ERROR" + case ErrCodeStreamCreationError: + return "H3_STREAM_CREATION_ERROR" + case ErrCodeClosedCriticalStream: + return "H3_CLOSED_CRITICAL_STREAM" + case ErrCodeFrameUnexpected: + return "H3_FRAME_UNEXPECTED" + case ErrCodeFrameError: + return "H3_FRAME_ERROR" + case ErrCodeExcessiveLoad: + return "H3_EXCESSIVE_LOAD" + case ErrCodeIDError: + return "H3_ID_ERROR" + case ErrCodeSettingsError: + return "H3_SETTINGS_ERROR" + case ErrCodeMissingSettings: + return "H3_MISSING_SETTINGS" + case ErrCodeRequestRejected: + return "H3_REQUEST_REJECTED" + case ErrCodeRequestCanceled: + return "H3_REQUEST_CANCELLED" + case ErrCodeRequestIncomplete: + return "H3_INCOMPLETE_REQUEST" + case ErrCodeMessageError: + return "H3_MESSAGE_ERROR" + case ErrCodeConnectError: + return "H3_CONNECT_ERROR" + case ErrCodeVersionFallback: + return "H3_VERSION_FALLBACK" + case ErrCodeDatagramError: + return "H3_DATAGRAM_ERROR" + default: + return "" + } +} diff --git a/backend/vendor/github.com/enetx/uquic/http3/frames.go b/backend/vendor/github.com/enetx/uquic/http3/frames.go new file mode 100644 index 0000000..22663ae --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/frames.go @@ -0,0 +1,187 @@ +package http3 + +import ( + "bytes" + "errors" + "fmt" + "io" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/quicvarint" +) + +// FrameType is the frame type of a HTTP/3 frame +type FrameType uint64 + +type unknownFrameHandlerFunc func(FrameType, error) (processed bool, err error) + +type frame interface{} + +var errHijacked = errors.New("hijacked") + +func parseNextFrame(r io.Reader, unknownFrameHandler unknownFrameHandlerFunc) (frame, error) { + qr := quicvarint.NewReader(r) + for { + t, err := quicvarint.Read(qr) + if err != nil { + if unknownFrameHandler != nil { + hijacked, err := unknownFrameHandler(0, err) + if err != nil { + return nil, err + } + if hijacked { + return nil, errHijacked + } + } + return nil, err + } + // Call the unknownFrameHandler for frames not defined in the HTTP/3 spec + if t > 0xd && unknownFrameHandler != nil { + hijacked, err := unknownFrameHandler(FrameType(t), nil) + if err != nil { + return nil, err + } + if hijacked { + return nil, errHijacked + } + // If the unknownFrameHandler didn't process the frame, it is our responsibility to skip it. + } + l, err := quicvarint.Read(qr) + if err != nil { + return nil, err + } + + switch t { + case 0x0: + return &dataFrame{Length: l}, nil + case 0x1: + return &headersFrame{Length: l}, nil + case 0x4: + return parseSettingsFrame(r, l) + case 0x3: // CANCEL_PUSH + case 0x5: // PUSH_PROMISE + case 0x7: // GOAWAY + case 0xd: // MAX_PUSH_ID + } + // skip over unknown frames + if _, err := io.CopyN(io.Discard, qr, int64(l)); err != nil { + return nil, err + } + } +} + +type dataFrame struct { + Length uint64 +} + +func (f *dataFrame) Append(b []byte) []byte { + b = quicvarint.Append(b, 0x0) + return quicvarint.Append(b, f.Length) +} + +type headersFrame struct { + Length uint64 +} + +func (f *headersFrame) Append(b []byte) []byte { + b = quicvarint.Append(b, 0x1) + return quicvarint.Append(b, f.Length) +} + +const ( + // Extended CONNECT, RFC 9220 + settingExtendedConnect = 0x8 + // HTTP Datagrams, RFC 9297 + settingDatagram = 0x33 +) + +type settingsFrame struct { + Datagram bool // HTTP Datagrams, RFC 9297 + ExtendedConnect bool // Extended CONNECT, RFC 9220 + + Other map[uint64]uint64 // all settings that we don't explicitly recognize +} + +func parseSettingsFrame(r io.Reader, l uint64) (*settingsFrame, error) { + if l > 8*(1<<10) { + return nil, fmt.Errorf("unexpected size for SETTINGS frame: %d", l) + } + buf := make([]byte, l) + if _, err := io.ReadFull(r, buf); err != nil { + if err == io.ErrUnexpectedEOF { + return nil, io.EOF + } + return nil, err + } + frame := &settingsFrame{} + b := bytes.NewReader(buf) + var readDatagram, readExtendedConnect bool + for b.Len() > 0 { + id, err := quicvarint.Read(b) + if err != nil { // should not happen. We allocated the whole frame already. + return nil, err + } + val, err := quicvarint.Read(b) + if err != nil { // should not happen. We allocated the whole frame already. + return nil, err + } + + switch id { + case settingExtendedConnect: + if readExtendedConnect { + return nil, fmt.Errorf("duplicate setting: %d", id) + } + readExtendedConnect = true + if val != 0 && val != 1 { + return nil, fmt.Errorf("invalid value for SETTINGS_ENABLE_CONNECT_PROTOCOL: %d", val) + } + frame.ExtendedConnect = val == 1 + case settingDatagram: + if readDatagram { + return nil, fmt.Errorf("duplicate setting: %d", id) + } + readDatagram = true + if val != 0 && val != 1 { + return nil, fmt.Errorf("invalid value for SETTINGS_H3_DATAGRAM: %d", val) + } + frame.Datagram = val == 1 + default: + if _, ok := frame.Other[id]; ok { + return nil, fmt.Errorf("duplicate setting: %d", id) + } + if frame.Other == nil { + frame.Other = make(map[uint64]uint64) + } + frame.Other[id] = val + } + } + return frame, nil +} + +func (f *settingsFrame) Append(b []byte) []byte { + b = quicvarint.Append(b, 0x4) + var l protocol.ByteCount + for id, val := range f.Other { + l += quicvarint.Len(id) + quicvarint.Len(val) + } + if f.Datagram { + l += quicvarint.Len(settingDatagram) + quicvarint.Len(1) + } + if f.ExtendedConnect { + l += quicvarint.Len(settingExtendedConnect) + quicvarint.Len(1) + } + b = quicvarint.Append(b, uint64(l)) + if f.Datagram { + b = quicvarint.Append(b, settingDatagram) + b = quicvarint.Append(b, 1) + } + if f.ExtendedConnect { + b = quicvarint.Append(b, settingExtendedConnect) + b = quicvarint.Append(b, 1) + } + for id, val := range f.Other { + b = quicvarint.Append(b, id) + b = quicvarint.Append(b, val) + } + return b +} diff --git a/backend/vendor/github.com/enetx/uquic/http3/gzip_reader.go b/backend/vendor/github.com/enetx/uquic/http3/gzip_reader.go new file mode 100644 index 0000000..01983ac --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/gzip_reader.go @@ -0,0 +1,39 @@ +package http3 + +// copied from net/transport.go + +// gzipReader wraps a response body so it can lazily +// call gzip.NewReader on the first call to Read +import ( + "compress/gzip" + "io" +) + +// call gzip.NewReader on the first call to Read +type gzipReader struct { + body io.ReadCloser // underlying Response.Body + zr *gzip.Reader // lazily-initialized gzip reader + zerr error // sticky error +} + +func newGzipReader(body io.ReadCloser) io.ReadCloser { + return &gzipReader{body: body} +} + +func (gz *gzipReader) Read(p []byte) (n int, err error) { + if gz.zerr != nil { + return 0, gz.zerr + } + if gz.zr == nil { + gz.zr, err = gzip.NewReader(gz.body) + if err != nil { + gz.zerr = err + return 0, err + } + } + return gz.zr.Read(p) +} + +func (gz *gzipReader) Close() error { + return gz.body.Close() +} diff --git a/backend/vendor/github.com/enetx/uquic/http3/headers.go b/backend/vendor/github.com/enetx/uquic/http3/headers.go new file mode 100644 index 0000000..87b829f --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/headers.go @@ -0,0 +1,202 @@ +package http3 + +import ( + "errors" + "fmt" + "github.com/enetx/http" + "net/url" + "strconv" + "strings" + + "golang.org/x/net/http/httpguts" + + "github.com/quic-go/qpack" +) + +type header struct { + // Pseudo header fields defined in RFC 9114 + Path string + Method string + Authority string + Scheme string + Status string + // for Extended connect + Protocol string + // parsed and deduplicated + ContentLength int64 + // all non-pseudo headers + Headers http.Header +} + +func parseHeaders(headers []qpack.HeaderField, isRequest bool) (header, error) { + hdr := header{Headers: make(http.Header, len(headers))} + var readFirstRegularHeader, readContentLength bool + var contentLengthStr string + for _, h := range headers { + // field names need to be lowercase, see section 4.2 of RFC 9114 + if strings.ToLower(h.Name) != h.Name { + return header{}, fmt.Errorf("header field is not lower-case: %s", h.Name) + } + if !httpguts.ValidHeaderFieldValue(h.Value) { + return header{}, fmt.Errorf("invalid header field value for %s: %q", h.Name, h.Value) + } + if h.IsPseudo() { + if readFirstRegularHeader { + // all pseudo headers must appear before regular header fields, see section 4.3 of RFC 9114 + return header{}, fmt.Errorf("received pseudo header %s after a regular header field", h.Name) + } + var isResponsePseudoHeader bool // pseudo headers are either valid for requests or for responses + switch h.Name { + case ":path": + hdr.Path = h.Value + case ":method": + hdr.Method = h.Value + case ":authority": + hdr.Authority = h.Value + case ":protocol": + hdr.Protocol = h.Value + case ":scheme": + hdr.Scheme = h.Value + case ":status": + hdr.Status = h.Value + isResponsePseudoHeader = true + default: + return header{}, fmt.Errorf("unknown pseudo header: %s", h.Name) + } + if isRequest && isResponsePseudoHeader { + return header{}, fmt.Errorf("invalid request pseudo header: %s", h.Name) + } + if !isRequest && !isResponsePseudoHeader { + return header{}, fmt.Errorf("invalid response pseudo header: %s", h.Name) + } + } else { + if !httpguts.ValidHeaderFieldName(h.Name) { + return header{}, fmt.Errorf("invalid header field name: %q", h.Name) + } + readFirstRegularHeader = true + switch h.Name { + case "content-length": + // Ignore duplicate Content-Length headers. + // Fail if the duplicates differ. + if !readContentLength { + readContentLength = true + contentLengthStr = h.Value + } else if contentLengthStr != h.Value { + return header{}, fmt.Errorf("contradicting content lengths (%s and %s)", contentLengthStr, h.Value) + } + default: + hdr.Headers.Add(h.Name, h.Value) + } + } + } + if len(contentLengthStr) > 0 { + // use ParseUint instead of ParseInt, so that parsing fails on negative values + cl, err := strconv.ParseUint(contentLengthStr, 10, 63) + if err != nil { + return header{}, fmt.Errorf("invalid content length: %w", err) + } + hdr.Headers.Set("Content-Length", contentLengthStr) + hdr.ContentLength = int64(cl) + } + return hdr, nil +} + +func requestFromHeaders(headerFields []qpack.HeaderField) (*http.Request, error) { + hdr, err := parseHeaders(headerFields, true) + if err != nil { + return nil, err + } + // concatenate cookie headers, see https://tools.ietf.org/html/rfc6265#section-5.4 + if len(hdr.Headers["Cookie"]) > 0 { + hdr.Headers.Set("Cookie", strings.Join(hdr.Headers["Cookie"], "; ")) + } + + isConnect := hdr.Method == http.MethodConnect + // Extended CONNECT, see https://datatracker.ietf.org/doc/html/rfc8441#section-4 + isExtendedConnected := isConnect && hdr.Protocol != "" + if isExtendedConnected { + if hdr.Scheme == "" || hdr.Path == "" || hdr.Authority == "" { + return nil, errors.New("extended CONNECT: :scheme, :path and :authority must not be empty") + } + } else if isConnect { + if hdr.Path != "" || hdr.Authority == "" { // normal CONNECT + return nil, errors.New(":path must be empty and :authority must not be empty") + } + } else if len(hdr.Path) == 0 || len(hdr.Authority) == 0 || len(hdr.Method) == 0 { + return nil, errors.New(":path, :authority and :method must not be empty") + } + + if !isExtendedConnected && len(hdr.Protocol) > 0 { + return nil, errors.New(":protocol must be empty") + } + + var u *url.URL + var requestURI string + + protocol := "HTTP/3.0" + + if isConnect { + u = &url.URL{} + if isExtendedConnected { + u, err = url.ParseRequestURI(hdr.Path) + if err != nil { + return nil, err + } + protocol = hdr.Protocol + } else { + u.Path = hdr.Path + } + u.Scheme = hdr.Scheme + u.Host = hdr.Authority + requestURI = hdr.Authority + } else { + u, err = url.ParseRequestURI(hdr.Path) + if err != nil { + return nil, fmt.Errorf("invalid content length: %w", err) + } + requestURI = hdr.Path + } + + return &http.Request{ + Method: hdr.Method, + URL: u, + Proto: protocol, + ProtoMajor: 3, + ProtoMinor: 0, + Header: hdr.Headers, + Body: nil, + ContentLength: hdr.ContentLength, + Host: hdr.Authority, + RequestURI: requestURI, + }, nil +} + +func hostnameFromRequest(req *http.Request) string { + if req.URL != nil { + return req.URL.Host + } + return "" +} + +func responseFromHeaders(headerFields []qpack.HeaderField) (*http.Response, error) { + hdr, err := parseHeaders(headerFields, false) + if err != nil { + return nil, err + } + if hdr.Status == "" { + return nil, errors.New("missing status field") + } + rsp := &http.Response{ + Proto: "HTTP/3.0", + ProtoMajor: 3, + Header: hdr.Headers, + ContentLength: hdr.ContentLength, + } + status, err := strconv.Atoi(hdr.Status) + if err != nil { + return nil, fmt.Errorf("invalid status code: %w", err) + } + rsp.StatusCode = status + rsp.Status = hdr.Status + " " + http.StatusText(status) + return rsp, nil +} diff --git a/backend/vendor/github.com/enetx/uquic/http3/http_stream.go b/backend/vendor/github.com/enetx/uquic/http3/http_stream.go new file mode 100644 index 0000000..9ff1952 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/http_stream.go @@ -0,0 +1,123 @@ +package http3 + +import ( + "errors" + "fmt" + + quic "github.com/enetx/uquic" +) + +// A Stream is a HTTP/3 stream. +// When writing to and reading from the stream, data is framed in HTTP/3 DATA frames. +type Stream quic.Stream + +// The stream conforms to the quic.Stream interface, but instead of writing to and reading directly +// from the QUIC stream, it writes to and reads from the HTTP stream. +type stream struct { + quic.Stream + + buf []byte + + onFrameError func() + bytesRemainingInFrame uint64 +} + +var _ Stream = &stream{} + +func newStream(str quic.Stream, onFrameError func()) *stream { + return &stream{ + Stream: str, + onFrameError: onFrameError, + buf: make([]byte, 0, 16), + } +} + +func (s *stream) Read(b []byte) (int, error) { + if s.bytesRemainingInFrame == 0 { + parseLoop: + for { + frame, err := parseNextFrame(s.Stream, nil) + if err != nil { + return 0, err + } + switch f := frame.(type) { + case *headersFrame: + // skip HEADERS frames + continue + case *dataFrame: + s.bytesRemainingInFrame = f.Length + break parseLoop + default: + s.onFrameError() + // parseNextFrame skips over unknown frame types + // Therefore, this condition is only entered when we parsed another known frame type. + return 0, fmt.Errorf("peer sent an unexpected frame: %T", f) + } + } + } + + var n int + var err error + if s.bytesRemainingInFrame < uint64(len(b)) { + n, err = s.Stream.Read(b[:s.bytesRemainingInFrame]) + } else { + n, err = s.Stream.Read(b) + } + s.bytesRemainingInFrame -= uint64(n) + return n, err +} + +func (s *stream) hasMoreData() bool { + return s.bytesRemainingInFrame > 0 +} + +func (s *stream) Write(b []byte) (int, error) { + s.buf = s.buf[:0] + s.buf = (&dataFrame{Length: uint64(len(b))}).Append(s.buf) + if _, err := s.Stream.Write(s.buf); err != nil { + return 0, err + } + return s.Stream.Write(b) +} + +var errTooMuchData = errors.New("peer sent too much data") + +type lengthLimitedStream struct { + *stream + contentLength int64 + read int64 + resetStream bool +} + +var _ Stream = &lengthLimitedStream{} + +func newLengthLimitedStream(str *stream, contentLength int64) *lengthLimitedStream { + return &lengthLimitedStream{ + stream: str, + contentLength: contentLength, + } +} + +func (s *lengthLimitedStream) checkContentLengthViolation() error { + if s.read > s.contentLength || s.read == s.contentLength && s.hasMoreData() { + if !s.resetStream { + s.CancelRead(quic.StreamErrorCode(ErrCodeMessageError)) + s.CancelWrite(quic.StreamErrorCode(ErrCodeMessageError)) + s.resetStream = true + } + return errTooMuchData + } + return nil +} + +func (s *lengthLimitedStream) Read(b []byte) (int, error) { + if err := s.checkContentLengthViolation(); err != nil { + return 0, err + } + n, err := s.stream.Read(b[:min(int64(len(b)), s.contentLength-s.read)]) + s.read += int64(n) + if err := s.checkContentLengthViolation(); err != nil { + return n, err + } + return n, err +} diff --git a/backend/vendor/github.com/enetx/uquic/http3/httpcommon/header.go b/backend/vendor/github.com/enetx/uquic/http3/httpcommon/header.go new file mode 100644 index 0000000..ee97122 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/httpcommon/header.go @@ -0,0 +1,127 @@ +package httpcommon + +import ( + "sort" + "strings" + "sync" + + "github.com/enetx/http" +) + +const ( + // HeaderOrderKey is a magic key for ResponseWriter.Header map keys + // that, if present, defines a header order that will be used to + // write the headers onto wire. The order of the list defined how the headers + // will be sorted. A defined key goes before an undefined key. + // + // This is the only way to specify some order, because maps don't + // have a a stable iteration order. If no order is given, headers will + // be sorted lexicographically. + // + // According to RFC-2616 it is good practice to send general-header fields + // first, followed by request-header or response-header fields and ending + // with entity-header fields. + HeaderOrderKey = "Header-Order:" + + // PHeaderOrderKey is a magic key for setting http3 pseudo header order. + // If the header is nil it will use regular GoLang header order. + // Valid fields are :authority, :method, :path, :scheme, :protocol + PHeaderOrderKey = "PHeader-Order:" +) + +// HeaderKeyValues represents a key-value pair for headers +type HeaderKeyValues struct { + Key string + Values []string +} + +// A HeaderSorter implements sort.Interface by sorting a []HeaderKeyValues +// by key. It's used as a pointer, so it can fit in a sort.Interface +// interface value without allocation. +type HeaderSorter struct { + kvs []HeaderKeyValues + order map[string]int +} + +func (s *HeaderSorter) Len() int { return len(s.kvs) } +func (s *HeaderSorter) Swap(i, j int) { s.kvs[i], s.kvs[j] = s.kvs[j], s.kvs[i] } +func (s *HeaderSorter) Less(i, j int) bool { + // If the order isn't defined, sort lexicographically. + if s.order == nil { + return s.kvs[i].Key < s.kvs[j].Key + } + + idxi, iok := s.order[strings.ToLower(s.kvs[i].Key)] + idxj, jok := s.order[strings.ToLower(s.kvs[j].Key)] + if !iok && !jok { + return s.kvs[i].Key < s.kvs[j].Key + } else if !iok && jok { + return false + } else if iok && !jok { + return true + } + + return idxi < idxj +} + +var headerSorterPool = sync.Pool{ + New: func() any { return new(HeaderSorter) }, +} + +var lock = sync.RWMutex{} + +// SortedKeyValues returns h's keys sorted in the returned kvs +// slice. The HeaderSorter used to sort is also returned, for possible +// return to headerSorterPool. +func SortedKeyValues(h http.Header, exclude map[string]bool) (kvs []HeaderKeyValues, hs *HeaderSorter) { + hs = headerSorterPool.Get().(*HeaderSorter) + if cap(hs.kvs) < len(h) { + hs.kvs = make([]HeaderKeyValues, 0, len(h)) + } + + kvs = hs.kvs[:0] + for k, vv := range h { + lock.RLock() + if !exclude[k] { + kvs = append(kvs, HeaderKeyValues{k, vv}) + } + lock.RUnlock() + } + + hs.kvs = kvs + sort.Sort(hs) + + return kvs, hs +} + +// SortedKeyValuesBy returns headers sorted by specified order +func SortedKeyValuesBy( + h http.Header, + order map[string]int, + exclude map[string]bool, +) (kvs []HeaderKeyValues, hs *HeaderSorter) { + hs = headerSorterPool.Get().(*HeaderSorter) + if cap(hs.kvs) < len(h) { + hs.kvs = make([]HeaderKeyValues, 0, len(h)) + } + + kvs = hs.kvs[:0] + for k, vv := range h { + lock.RLock() + if !exclude[k] { + kvs = append(kvs, HeaderKeyValues{k, vv}) + } + lock.RUnlock() + } + + hs.kvs = kvs + hs.order = order + sort.Sort(hs) + + return kvs, hs +} + +// ReturnSorter returns a header sorter to the pool +func ReturnSorter(hs *HeaderSorter) { + headerSorterPool.Put(hs) +} diff --git a/backend/vendor/github.com/enetx/uquic/http3/mockgen.go b/backend/vendor/github.com/enetx/uquic/http3/mockgen.go new file mode 100644 index 0000000..57af797 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/mockgen.go @@ -0,0 +1,8 @@ +//go:build gomock || generate + +package http3 + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package http3 -destination mock_roundtripcloser_test.go github.com/quic-go/quic-go/http3 RoundTripCloser" +type RoundTripCloser = roundTripCloser + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -package http3 -destination mock_quic_early_listener_test.go github.com/quic-go/quic-go/http3 QUICEarlyListener" diff --git a/backend/vendor/github.com/enetx/uquic/http3/request_writer.go b/backend/vendor/github.com/enetx/uquic/http3/request_writer.go new file mode 100644 index 0000000..138dae1 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/request_writer.go @@ -0,0 +1,342 @@ +package http3 + +import ( + "bytes" + "errors" + "fmt" + "io" + "net" + "strconv" + "strings" + "sync" + + "github.com/enetx/http" + + "golang.org/x/net/http/httpguts" + "golang.org/x/net/http2/hpack" + "golang.org/x/net/idna" + + "github.com/quic-go/qpack" + quic "github.com/enetx/uquic" + "github.com/enetx/uquic/http3/httpcommon" + "github.com/enetx/uquic/internal/utils" +) + +const bodyCopyBufferSize = 8 * 1024 + +type requestWriter struct { + mutex sync.Mutex + encoder *qpack.Encoder + headerBuf *bytes.Buffer + + logger utils.Logger +} + +func newRequestWriter(logger utils.Logger) *requestWriter { + headerBuf := &bytes.Buffer{} + encoder := qpack.NewEncoder(headerBuf) + return &requestWriter{ + encoder: encoder, + headerBuf: headerBuf, + logger: logger, + } +} + +func (w *requestWriter) WriteRequestHeader(str quic.Stream, req *http.Request, gzip bool) error { + // TODO: figure out how to add support for trailers + buf := &bytes.Buffer{} + if err := w.writeHeaders(buf, req, gzip); err != nil { + return err + } + _, err := str.Write(buf.Bytes()) + return err +} + +func (w *requestWriter) writeHeaders(wr io.Writer, req *http.Request, gzip bool) error { + w.mutex.Lock() + defer w.mutex.Unlock() + defer w.encoder.Close() + defer w.headerBuf.Reset() + + if err := w.encodeHeaders(req, gzip, "", actualContentLength(req)); err != nil { + return err + } + + b := make([]byte, 0, 128) + b = (&headersFrame{Length: uint64(w.headerBuf.Len())}).Append(b) + if _, err := wr.Write(b); err != nil { + return err + } + _, err := wr.Write(w.headerBuf.Bytes()) + return err +} + +// copied from net/transport.go +// Modified to support Extended CONNECT: +// Contrary to what the godoc for the http.Request says, +// we do respect the Proto field if the method is CONNECT. +func (w *requestWriter) encodeHeaders(req *http.Request, addGzipHeader bool, trailers string, contentLength int64) error { + host := req.Host + if host == "" { + host = req.URL.Host + } + host, err := httpguts.PunycodeHostPort(host) + if err != nil { + return err + } + if !httpguts.ValidHostHeader(host) { + return errors.New("http3: invalid Host header") + } + + // http.NewRequest sets this field to HTTP/1.1 + isExtendedConnect := req.Method == http.MethodConnect && req.Proto != "" && req.Proto != "HTTP/1.1" + + var path string + if req.Method != http.MethodConnect || isExtendedConnect { + path = req.URL.RequestURI() + if !validPseudoPath(path) { + orig := path + path = strings.TrimPrefix(path, req.URL.Scheme+"://"+host) + if !validPseudoPath(path) { + if req.URL.Opaque != "" { + return fmt.Errorf("invalid request :path %q from URL.Opaque = %q", orig, req.URL.Opaque) + } else { + return fmt.Errorf("invalid request :path %q", orig) + } + } + } + } + + // Check for any invalid headers and return an error before we + // potentially pollute our hpack state. (We want to be able to + // continue to reuse the hpack encoder for future requests) + for k, vv := range req.Header { + // Skip validation for special header order keys + if k == httpcommon.HeaderOrderKey || k == httpcommon.PHeaderOrderKey { + continue + } + if !httpguts.ValidHeaderFieldName(k) { + return fmt.Errorf("invalid HTTP header name %q", k) + } + for _, v := range vv { + if !httpguts.ValidHeaderFieldValue(v) { + return fmt.Errorf("invalid HTTP header value %q for header %q", v, k) + } + } + } + + enumerateHeaders := func(f func(name, value string)) { + // Handle pseudo-headers with order support + pHeaderOrder, hasPHeaderOrder := req.Header[httpcommon.PHeaderOrderKey] + + if hasPHeaderOrder { + // Follow pseudo header order + for _, p := range pHeaderOrder { + switch p { + case ":authority": + f(":authority", host) + case ":method": + f(":method", req.Method) + case ":path": + if req.Method != http.MethodConnect || isExtendedConnect { + f(":path", path) + } + case ":scheme": + if req.Method != http.MethodConnect || isExtendedConnect { + f(":scheme", req.URL.Scheme) + } + case ":protocol": + if isExtendedConnect { + f(":protocol", req.Proto) + } + default: + continue + } + } + } else { + // Default pseudo-header order + f(":authority", host) + f(":method", req.Method) + if req.Method != http.MethodConnect || isExtendedConnect { + f(":path", path) + f(":scheme", req.URL.Scheme) + } + if isExtendedConnect { + f(":protocol", req.Proto) + } + } + + if trailers != "" { + f("trailer", trailers) + } + + // Handle regular headers with order support + exclude := make(map[string]bool) + exclude[httpcommon.HeaderOrderKey] = true + exclude[httpcommon.PHeaderOrderKey] = true + + var kvs []httpcommon.HeaderKeyValues + var sorter *httpcommon.HeaderSorter + + if headerOrder, hasHeaderOrder := req.Header[httpcommon.HeaderOrderKey]; hasHeaderOrder { + order := make(map[string]int) + for i, v := range headerOrder { + order[v] = i + } + kvs, sorter = httpcommon.SortedKeyValuesBy(req.Header, order, exclude) + } else { + kvs, sorter = httpcommon.SortedKeyValues(req.Header, exclude) + } + + var didUA bool + for _, kv := range kvs { + k := kv.Key + vv := kv.Values + + if strings.EqualFold(k, "host") || strings.EqualFold(k, "content-length") { + // Host is :authority, already sent. + // Content-Length is automatic, set below. + continue + } else if strings.EqualFold(k, "connection") || strings.EqualFold(k, "proxy-connection") || + strings.EqualFold(k, "transfer-encoding") || strings.EqualFold(k, "upgrade") || + strings.EqualFold(k, "keep-alive") { + // Per 8.1.2.2 Connection-Specific Header + // Fields, don't send connection-specific + // fields. We have already checked if any + // are error-worthy so just ignore the rest. + continue + } else if strings.EqualFold(k, "user-agent") { + // Match Go's http1 behavior: at most one + // User-Agent. If set to nil or empty string, + // then omit it. Otherwise if not mentioned, + // include the default (below). + didUA = true + if len(vv) < 1 { + continue + } + vv = vv[:1] + if vv[0] == "" { + continue + } + } + + for _, v := range vv { + f(k, v) + } + } + + httpcommon.ReturnSorter(sorter) + + if shouldSendReqContentLength(req.Method, contentLength) { + f("content-length", strconv.FormatInt(contentLength, 10)) + } + if addGzipHeader { + f("accept-encoding", "gzip") + } + if !didUA { + f("user-agent", defaultUserAgent) + } + } + + // Do a first pass over the headers counting bytes to ensure + // we don't exceed cc.peerMaxHeaderListSize. This is done as a + // separate pass before encoding the headers to prevent + // modifying the hpack state. + hlSize := uint64(0) + enumerateHeaders(func(name, value string) { + hf := hpack.HeaderField{Name: name, Value: value} + hlSize += uint64(hf.Size()) + }) + + // TODO: check maximum header list size + // if hlSize > cc.peerMaxHeaderListSize { + // return errRequestHeaderListSize + // } + + // trace := httptrace.ContextClientTrace(req.Context()) + // traceHeaders := traceHasWroteHeaderField(trace) + + // Header list size is ok. Write the headers. + enumerateHeaders(func(name, value string) { + name = strings.ToLower(name) + w.encoder.WriteField(qpack.HeaderField{Name: name, Value: value}) + // if traceHeaders { + // traceWroteHeaderField(trace, name, value) + // } + }) + + return nil +} + +// authorityAddr returns a given authority (a host/IP, or host:port / ip:port) +// and returns a host:port. The port 443 is added if needed. +func authorityAddr(scheme string, authority string) (addr string) { + host, port, err := net.SplitHostPort(authority) + if err != nil { // authority didn't have a port + port = "443" + if scheme == "http" { + port = "80" + } + host = authority + } + if a, err := idna.ToASCII(host); err == nil { + host = a + } + // IPv6 address literal, without a port: + if strings.HasPrefix(host, "[") && strings.HasSuffix(host, "]") { + return host + ":" + port + } + return net.JoinHostPort(host, port) +} + +// validPseudoPath reports whether v is a valid :path pseudo-header +// value. It must be either: +// +// *) a non-empty string starting with '/' +// *) the string '*', for OPTIONS requests. +// +// For now this is only used a quick check for deciding when to clean +// up Opaque URLs before sending requests from the Transport. +// See golang.org/issue/16847 +// +// We used to enforce that the path also didn't start with "//", but +// Google's GFE accepts such paths and Chrome sends them, so ignore +// that part of the spec. See golang.org/issue/19103. +func validPseudoPath(v string) bool { + return (len(v) > 0 && v[0] == '/') || v == "*" +} + +// actualContentLength returns a sanitized version of +// req.ContentLength, where 0 actually means zero (not unknown) and -1 +// means unknown. +func actualContentLength(req *http.Request) int64 { + if req.Body == nil { + return 0 + } + if req.ContentLength != 0 { + return req.ContentLength + } + return -1 +} + +// shouldSendReqContentLength reports whether the http2.Transport should send +// a "content-length" request header. This logic is basically a copy of the net/http +// transferWriter.shouldSendContentLength. +// The contentLength is the corrected contentLength (so 0 means actually 0, not unknown). +// -1 means unknown. +func shouldSendReqContentLength(method string, contentLength int64) bool { + if contentLength > 0 { + return true + } + if contentLength < 0 { + return false + } + // For zero bodies, whether we send a content-length depends on the method. + // It also kinda doesn't matter for http2 either way, with END_STREAM. + switch method { + case "POST", "PUT", "PATCH": + return true + default: + return false + } +} diff --git a/backend/vendor/github.com/enetx/uquic/http3/response_writer.go b/backend/vendor/github.com/enetx/uquic/http3/response_writer.go new file mode 100644 index 0000000..2fd1058 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/response_writer.go @@ -0,0 +1,224 @@ +package http3 + +import ( + "bufio" + "bytes" + "fmt" + "github.com/enetx/http" + "strconv" + "strings" + "time" + + quic "github.com/enetx/uquic" + "github.com/enetx/uquic/internal/utils" + + "github.com/quic-go/qpack" +) + +// The maximum length of an encoded HTTP/3 frame header is 16: +// The frame has a type and length field, both QUIC varints (maximum 8 bytes in length) +const frameHeaderLen = 16 + +// headerWriter wraps the stream, so that the first Write call flushes the header to the stream +type headerWriter struct { + str quic.Stream + header http.Header + status int // status code passed to WriteHeader + written bool + + logger utils.Logger +} + +// writeHeader encodes and flush header to the stream +func (hw *headerWriter) writeHeader() error { + var headers bytes.Buffer + enc := qpack.NewEncoder(&headers) + enc.WriteField(qpack.HeaderField{Name: ":status", Value: strconv.Itoa(hw.status)}) + + for k, v := range hw.header { + for index := range v { + enc.WriteField(qpack.HeaderField{Name: strings.ToLower(k), Value: v[index]}) + } + } + + buf := make([]byte, 0, frameHeaderLen+headers.Len()) + buf = (&headersFrame{Length: uint64(headers.Len())}).Append(buf) + hw.logger.Infof("Responding with %d", hw.status) + buf = append(buf, headers.Bytes()...) + + _, err := hw.str.Write(buf) + return err +} + +// first Write will trigger flushing header +func (hw *headerWriter) Write(p []byte) (int, error) { + if !hw.written { + if err := hw.writeHeader(); err != nil { + return 0, err + } + hw.written = true + } + return hw.str.Write(p) +} + +type responseWriter struct { + *headerWriter + conn quic.Connection + bufferedStr *bufio.Writer + buf []byte + + contentLen int64 // if handler set valid Content-Length header + numWritten int64 // bytes written + headerWritten bool + isHead bool +} + +var ( + _ http.ResponseWriter = &responseWriter{} + _ http.Flusher = &responseWriter{} + _ Hijacker = &responseWriter{} +) + +func newResponseWriter(str quic.Stream, conn quic.Connection, logger utils.Logger) *responseWriter { + hw := &headerWriter{ + str: str, + header: http.Header{}, + logger: logger, + } + return &responseWriter{ + headerWriter: hw, + buf: make([]byte, frameHeaderLen), + conn: conn, + bufferedStr: bufio.NewWriter(hw), + } +} + +func (w *responseWriter) Header() http.Header { + return w.header +} + +func (w *responseWriter) WriteHeader(status int) { + if w.headerWritten { + return + } + + // http status must be 3 digits + if status < 100 || status > 999 { + panic(fmt.Sprintf("invalid WriteHeader code %v", status)) + } + + if status >= 200 { + w.headerWritten = true + // Add Date header. + // This is what the standard library does. + // Can be disabled by setting the Date header to nil. + if _, ok := w.header["Date"]; !ok { + w.header.Set("Date", time.Now().UTC().Format(http.TimeFormat)) + } + // Content-Length checking + // use ParseUint instead of ParseInt, as negative values are invalid + if clen := w.header.Get("Content-Length"); clen != "" { + if cl, err := strconv.ParseUint(clen, 10, 63); err == nil { + w.contentLen = int64(cl) + } else { + // emit a warning for malformed Content-Length and remove it + w.logger.Errorf("Malformed Content-Length %s", clen) + w.header.Del("Content-Length") + } + } + } + w.status = status + + if !w.headerWritten { + w.writeHeader() + } +} + +func (w *responseWriter) Write(p []byte) (int, error) { + bodyAllowed := bodyAllowedForStatus(w.status) + if !w.headerWritten { + // If body is not allowed, we don't need to (and we can't) sniff the content type. + if bodyAllowed { + // If no content type, apply sniffing algorithm to body. + // We can't use `w.header.Get` here since if the Content-Type was set to nil, we shoundn't do sniffing. + _, haveType := w.header["Content-Type"] + + // If the Transfer-Encoding or Content-Encoding was set and is non-blank, + // we shouldn't sniff the body. + hasTE := w.header.Get("Transfer-Encoding") != "" + hasCE := w.header.Get("Content-Encoding") != "" + if !hasCE && !haveType && !hasTE && len(p) > 0 { + w.header.Set("Content-Type", http.DetectContentType(p)) + } + } + w.WriteHeader(http.StatusOK) + bodyAllowed = true + } + if !bodyAllowed { + return 0, http.ErrBodyNotAllowed + } + + w.numWritten += int64(len(p)) + if w.contentLen != 0 && w.numWritten > w.contentLen { + return 0, http.ErrContentLength + } + + if w.isHead { + return len(p), nil + } + + df := &dataFrame{Length: uint64(len(p))} + w.buf = w.buf[:0] + w.buf = df.Append(w.buf) + if _, err := w.bufferedStr.Write(w.buf); err != nil { + return 0, maybeReplaceError(err) + } + n, err := w.bufferedStr.Write(p) + return n, maybeReplaceError(err) +} + +func (w *responseWriter) FlushError() error { + if !w.headerWritten { + w.WriteHeader(http.StatusOK) + } + if !w.written { + if err := w.writeHeader(); err != nil { + return maybeReplaceError(err) + } + w.written = true + } + return w.bufferedStr.Flush() +} + +func (w *responseWriter) Flush() { + if err := w.FlushError(); err != nil { + w.logger.Errorf("could not flush to stream: %s", err.Error()) + } +} + +func (w *responseWriter) StreamCreator() StreamCreator { + return w.conn +} + +func (w *responseWriter) SetReadDeadline(deadline time.Time) error { + return w.str.SetReadDeadline(deadline) +} + +func (w *responseWriter) SetWriteDeadline(deadline time.Time) error { + return w.str.SetWriteDeadline(deadline) +} + +// copied from http2/http2.go +// bodyAllowedForStatus reports whether a given response status code +// permits a body. See RFC 2616, section 4.4. +func bodyAllowedForStatus(status int) bool { + switch { + case status >= 100 && status <= 199: + return false + case status == http.StatusNoContent: + return false + case status == http.StatusNotModified: + return false + } + return true +} diff --git a/backend/vendor/github.com/enetx/uquic/http3/roundtrip.go b/backend/vendor/github.com/enetx/uquic/http3/roundtrip.go new file mode 100644 index 0000000..6b6c321 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/roundtrip.go @@ -0,0 +1,323 @@ +package http3 + +import ( + "context" + "errors" + "fmt" + "io" + "net" + "strings" + "sync" + "sync/atomic" + + "github.com/enetx/http" + + quic "github.com/enetx/uquic" + "github.com/enetx/uquic/http3/httpcommon" + tls "github.com/enetx/utls" + + "golang.org/x/net/http/httpguts" +) + +// Settings are HTTP/3 settings that apply to the underlying connection. +type Settings struct { + // Support for HTTP/3 datagrams (RFC 9297) + EnableDatagram bool + // Extended CONNECT, RFC 9220 + EnableExtendedConnect bool + // Other settings, defined by the application + Other map[uint64]uint64 +} + +// RoundTripOpt are options for the Transport.RoundTripOpt method. +type RoundTripOpt struct { + // OnlyCachedConn controls whether the RoundTripper may create a new QUIC connection. + // If set true and no cached connection is available, RoundTripOpt will return ErrNoCachedConn. + OnlyCachedConn bool + // DontCloseRequestStream controls whether the request stream is closed after sending the request. + // If set, context cancellations have no effect after the response headers are received. + DontCloseRequestStream bool + // CheckSettings is run before the request is sent to the server. + // If not yet received, it blocks until the server's SETTINGS frame is received. + // If an error is returned, the request won't be sent to the server, and the error is returned. + CheckSettings func(Settings) error +} + +type roundTripCloser interface { + RoundTripOpt(*http.Request, RoundTripOpt) (*http.Response, error) + HandshakeComplete() bool + io.Closer +} + +type roundTripCloserWithCount struct { + roundTripCloser + useCount atomic.Int64 +} + +// RoundTripper implements the http.RoundTripper interface +type RoundTripper struct { + mutex sync.Mutex + + // DisableCompression, if true, prevents the Transport from + // requesting compression with an "Accept-Encoding: gzip" + // request header when the Request contains no existing + // Accept-Encoding value. If the Transport requests gzip on + // its own and gets a gzipped response, it's transparently + // decoded in the Response.Body. However, if the user + // explicitly requested gzip it is not automatically + // uncompressed. + DisableCompression bool + + // TLSClientConfig specifies the TLS configuration to use with + // tls.Client. If nil, the default configuration is used. + TLSClientConfig *tls.Config + + // QuicConfig is the quic.Config used for dialing new connections. + // If nil, reasonable default values will be used. + QuicConfig *quic.Config + + // Enable support for HTTP/3 datagrams (RFC 9297). + // If a QuicConfig is set, datagram support also needs to be enabled on the QUIC layer by setting EnableDatagrams. + EnableDatagrams bool + + // Additional HTTP/3 settings. + // It is invalid to specify any settings defined by the HTTP/3 draft and the datagram draft. + AdditionalSettings map[uint64]uint64 + + // When set, this callback is called for the first unknown frame parsed on a bidirectional stream. + // It is called right after parsing the frame type. + // If parsing the frame type fails, the error is passed to the callback. + // In that case, the frame type will not be set. + // Callers can either ignore the frame and return control of the stream back to HTTP/3 + // (by returning hijacked false). + // Alternatively, callers can take over the QUIC stream (by returning hijacked true). + StreamHijacker func(FrameType, quic.Connection, quic.Stream, error) (hijacked bool, err error) + + // When set, this callback is called for unknown unidirectional stream of unknown stream type. + // If parsing the stream type fails, the error is passed to the callback. + // In that case, the stream type will not be set. + UniStreamHijacker func(StreamType, quic.Connection, quic.ReceiveStream, error) (hijacked bool) + + // Dial specifies an optional dial function for creating QUIC + // connections for requests. + // If Dial is nil, a UDPConn will be created at the first request + // and will be reused for subsequent connections to other servers. + Dial func(ctx context.Context, addr string, tlsCfg *tls.Config, cfg *quic.Config) (quic.EarlyConnection, error) + + // MaxResponseHeaderBytes specifies a limit on how many response bytes are + // allowed in the server's response header. + // Zero means to use a default limit. + MaxResponseHeaderBytes int64 + + newClient func(hostname string, tlsConf *tls.Config, opts *roundTripperOpts, conf *quic.Config, dialer dialFunc) (roundTripCloser, error) // so we can mock it in tests + clients map[string]*roundTripCloserWithCount + transport *quic.Transport +} + +var ( + _ http.RoundTripper = &RoundTripper{} + _ io.Closer = &RoundTripper{} +) + +// ErrNoCachedConn is returned when RoundTripper.OnlyCachedConn is set +var ErrNoCachedConn = errors.New("http3: no cached connection was available") + +// RoundTripOpt is like RoundTrip, but takes options. +func (r *RoundTripper) RoundTripOpt(req *http.Request, opt RoundTripOpt) (*http.Response, error) { + if req.URL == nil { + closeRequestBody(req) + return nil, errors.New("http3: nil Request.URL") + } + if req.URL.Scheme != "https" { + closeRequestBody(req) + return nil, fmt.Errorf("http3: unsupported protocol scheme: %s", req.URL.Scheme) + } + if req.URL.Host == "" { + closeRequestBody(req) + return nil, errors.New("http3: no Host in request URL") + } + if req.Header == nil { + closeRequestBody(req) + return nil, errors.New("http3: nil Request.Header") + } + for k, vv := range req.Header { + // Skip validation for special header order keys + if k == httpcommon.HeaderOrderKey || k == httpcommon.PHeaderOrderKey { + continue + } + if !httpguts.ValidHeaderFieldName(k) { + return nil, fmt.Errorf("http3: invalid http header field name %q", k) + } + for _, v := range vv { + if !httpguts.ValidHeaderFieldValue(v) { + return nil, fmt.Errorf("http3: invalid http header field value %q for key %v", v, k) + } + } + } + + if req.Method != "" && !validMethod(req.Method) { + closeRequestBody(req) + return nil, fmt.Errorf("http3: invalid method %q", req.Method) + } + + hostname := authorityAddr("https", hostnameFromRequest(req)) + cl, isReused, err := r.getClient(hostname, opt.OnlyCachedConn) + if err != nil { + return nil, err + } + defer cl.useCount.Add(-1) + rsp, err := cl.RoundTripOpt(req, opt) + if err != nil { + r.removeClient(hostname) + if isReused { + if nerr, ok := err.(net.Error); ok && nerr.Timeout() { + return r.RoundTripOpt(req, opt) + } + } + } + return rsp, err +} + +// RoundTrip does a round trip. +func (r *RoundTripper) RoundTrip(req *http.Request) (*http.Response, error) { + return r.RoundTripOpt(req, RoundTripOpt{}) +} + +func (r *RoundTripper) getClient(hostname string, onlyCached bool) (rtc *roundTripCloserWithCount, isReused bool, err error) { + r.mutex.Lock() + defer r.mutex.Unlock() + + if r.clients == nil { + r.clients = make(map[string]*roundTripCloserWithCount) + } + + client, ok := r.clients[hostname] + if !ok { + if onlyCached { + return nil, false, ErrNoCachedConn + } + var err error + newCl := newClient + if r.newClient != nil { + newCl = r.newClient + } + dial := r.Dial + if dial == nil { + if r.transport == nil { + udpConn, err := net.ListenUDP("udp", nil) + if err != nil { + return nil, false, err + } + r.transport = &quic.Transport{ + Conn: udpConn, + } + } + dial = r.makeDialer() + } + c, err := newCl( + hostname, + r.TLSClientConfig, + &roundTripperOpts{ + EnableDatagram: r.EnableDatagrams, + DisableCompression: r.DisableCompression, + MaxHeaderBytes: r.MaxResponseHeaderBytes, + StreamHijacker: r.StreamHijacker, + UniStreamHijacker: r.UniStreamHijacker, + AdditionalSettings: r.AdditionalSettings, + }, + r.QuicConfig, + dial, + ) + if err != nil { + return nil, false, err + } + client = &roundTripCloserWithCount{roundTripCloser: c} + r.clients[hostname] = client + } else if client.HandshakeComplete() { + isReused = true + } + client.useCount.Add(1) + return client, isReused, nil +} + +func (r *RoundTripper) removeClient(hostname string) { + r.mutex.Lock() + defer r.mutex.Unlock() + if r.clients == nil { + return + } + delete(r.clients, hostname) +} + +// Close closes the QUIC connections that this RoundTripper has used. +// It also closes the underlying UDPConn if it is not nil. +func (r *RoundTripper) Close() error { + r.mutex.Lock() + defer r.mutex.Unlock() + for _, client := range r.clients { + if err := client.Close(); err != nil { + return err + } + } + r.clients = nil + if r.transport != nil { + if err := r.transport.Close(); err != nil { + return err + } + if err := r.transport.Conn.Close(); err != nil { + return err + } + r.transport = nil + } + return nil +} + +func closeRequestBody(req *http.Request) { + if req.Body != nil { + req.Body.Close() + } +} + +func validMethod(method string) bool { + /* + Method = "OPTIONS" ; Section 9.2 + | "GET" ; Section 9.3 + | "HEAD" ; Section 9.4 + | "POST" ; Section 9.5 + | "PUT" ; Section 9.6 + | "DELETE" ; Section 9.7 + | "TRACE" ; Section 9.8 + | "CONNECT" ; Section 9.9 + | extension-method + extension-method = token + token = 1* + */ + return len(method) > 0 && strings.IndexFunc(method, isNotToken) == -1 +} + +// copied from net/http/http.go +func isNotToken(r rune) bool { + return !httpguts.IsTokenRune(r) +} + +// makeDialer makes a QUIC dialer using r.udpConn. +func (r *RoundTripper) makeDialer() func(ctx context.Context, addr string, tlsCfg *tls.Config, cfg *quic.Config) (quic.EarlyConnection, error) { + return func(ctx context.Context, addr string, tlsCfg *tls.Config, cfg *quic.Config) (quic.EarlyConnection, error) { + udpAddr, err := net.ResolveUDPAddr("udp", addr) + if err != nil { + return nil, err + } + return r.transport.DialEarly(ctx, udpAddr, tlsCfg, cfg) + } +} + +func (r *RoundTripper) CloseIdleConnections() { + r.mutex.Lock() + defer r.mutex.Unlock() + for hostname, client := range r.clients { + if client.useCount.Load() == 0 { + client.Close() + delete(r.clients, hostname) + } + } +} diff --git a/backend/vendor/github.com/enetx/uquic/http3/server.go b/backend/vendor/github.com/enetx/uquic/http3/server.go new file mode 100644 index 0000000..7f5fcc2 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/server.go @@ -0,0 +1,831 @@ +package http3 + +import ( + "context" + ctls "crypto/tls" + "errors" + "fmt" + "io" + "net" + "github.com/enetx/http" + "runtime" + "strconv" + "strings" + "sync" + "sync/atomic" + "time" + + tls "github.com/enetx/utls" + + quic "github.com/enetx/uquic" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/quicvarint" + + "github.com/quic-go/qpack" +) + +// allows mocking of quic.Listen and quic.ListenAddr +var ( + quicListen = func(conn net.PacketConn, tlsConf *tls.Config, config *quic.Config) (QUICEarlyListener, error) { + return quic.ListenEarly(conn, tlsConf, config) + } + quicListenAddr = func(addr string, tlsConf *tls.Config, config *quic.Config) (QUICEarlyListener, error) { + return quic.ListenAddrEarly(addr, tlsConf, config) + } + errPanicked = errors.New("panicked") +) + +// NextProtoH3 is the ALPN protocol negotiated during the TLS handshake, for QUIC v1 and v2. +const NextProtoH3 = "h3" + +// StreamType is the stream type of a unidirectional stream. +type StreamType uint64 + +const ( + streamTypeControlStream = 0 + streamTypePushStream = 1 + streamTypeQPACKEncoderStream = 2 + streamTypeQPACKDecoderStream = 3 +) + +// A QUICEarlyListener listens for incoming QUIC connections. +type QUICEarlyListener interface { + Accept(context.Context) (quic.EarlyConnection, error) + Addr() net.Addr + io.Closer +} + +var _ QUICEarlyListener = &quic.EarlyListener{} + +func versionToALPN(v protocol.Version) string { + //nolint:exhaustive // These are all the versions we care about. + switch v { + case protocol.Version1, protocol.Version2: + return NextProtoH3 + default: + return "" + } +} + +// ConfigureTLSConfig creates a new tls.Config which can be used +// to create a quic.Listener meant for serving http3. The created +// tls.Config adds the functionality of detecting the used QUIC version +// in order to set the correct ALPN value for the http3 connection. +func ConfigureTLSConfig(tlsConf *tls.Config) *tls.Config { + // The tls.Config used to setup the quic.Listener needs to have the GetConfigForClient callback set. + // That way, we can get the QUIC version and set the correct ALPN value. + return &tls.Config{ + GetConfigForClient: func(ch *tls.ClientHelloInfo) (*tls.Config, error) { + // determine the ALPN from the QUIC version used + proto := NextProtoH3 + val := ch.Context().Value(quic.QUICVersionContextKey) + if v, ok := val.(quic.Version); ok { + proto = versionToALPN(v) + } + config := tlsConf + if tlsConf.GetConfigForClient != nil { + getConfigForClient := tlsConf.GetConfigForClient + var err error + conf, err := getConfigForClient(ch) + if err != nil { + return nil, err + } + if conf != nil { + config = conf + } + } + if config == nil { + return nil, nil + } + config = config.Clone() + config.NextProtos = []string{proto} + return config, nil + }, + } +} + +// contextKey is a value for use with context.WithValue. It's used as +// a pointer so it fits in an interface{} without allocation. +type contextKey struct { + name string +} + +func (k *contextKey) String() string { return "quic-go/http3 context value " + k.name } + +// ServerContextKey is a context key. It can be used in HTTP +// handlers with Context.Value to access the server that +// started the handler. The associated value will be of +// type *http3.Server. +var ServerContextKey = &contextKey{"http3-server"} + +// RemoteAddrContextKey is a context key. It can be used in +// HTTP handlers with Context.Value to access the remote +// address of the connection. The associated value will be of +// type net.Addr. +// +// Use this value instead of [http.Request.RemoteAddr] if you +// require access to the remote address of the connection rather +// than its string representation. +var RemoteAddrContextKey = &contextKey{"remote-addr"} + +type requestError struct { + err error + streamErr ErrCode + connErr ErrCode +} + +func newStreamError(code ErrCode, err error) requestError { + return requestError{err: err, streamErr: code} +} + +func newConnError(code ErrCode, err error) requestError { + return requestError{err: err, connErr: code} +} + +// listenerInfo contains info about specific listener added with addListener +type listenerInfo struct { + port int // 0 means that no info about port is available +} + +// Server is a HTTP/3 server. +type Server struct { + // Addr optionally specifies the UDP address for the server to listen on, + // in the form "host:port". + // + // When used by ListenAndServe and ListenAndServeTLS methods, if empty, + // ":https" (port 443) is used. See net.Dial for details of the address + // format. + // + // Otherwise, if Port is not set and underlying QUIC listeners do not + // have valid port numbers, the port part is used in Alt-Svc headers set + // with SetQuicHeaders. + Addr string + + // Port is used in Alt-Svc response headers set with SetQuicHeaders. If + // needed Port can be manually set when the Server is created. + // + // This is useful when a Layer 4 firewall is redirecting UDP traffic and + // clients must use a port different from the port the Server is + // listening on. + Port int + + // TLSConfig provides a TLS configuration for use by server. It must be + // set for ListenAndServe and Serve methods. + TLSConfig *tls.Config + + // QuicConfig provides the parameters for QUIC connection created with + // Serve. If nil, it uses reasonable default values. + // + // Configured versions are also used in Alt-Svc response header set with + // SetQuicHeaders. + QuicConfig *quic.Config + + // Handler is the HTTP request handler to use. If not set, defaults to + // http.NotFound. + Handler http.Handler + + // EnableDatagrams enables support for HTTP/3 datagrams. + // If set to true, QuicConfig.EnableDatagram will be set. + // See https://datatracker.ietf.org/doc/html/rfc9297. + EnableDatagrams bool + + // MaxHeaderBytes controls the maximum number of bytes the server will + // read parsing the request HEADERS frame. It does not limit the size of + // the request body. If zero or negative, http.DefaultMaxHeaderBytes is + // used. + MaxHeaderBytes int + + // AdditionalSettings specifies additional HTTP/3 settings. + // It is invalid to specify any settings defined by the HTTP/3 draft and the datagram draft. + AdditionalSettings map[uint64]uint64 + + // StreamHijacker, when set, is called for the first unknown frame parsed on a bidirectional stream. + // It is called right after parsing the frame type. + // If parsing the frame type fails, the error is passed to the callback. + // In that case, the frame type will not be set. + // Callers can either ignore the frame and return control of the stream back to HTTP/3 + // (by returning hijacked false). + // Alternatively, callers can take over the QUIC stream (by returning hijacked true). + StreamHijacker func(FrameType, quic.Connection, quic.Stream, error) (hijacked bool, err error) + + // UniStreamHijacker, when set, is called for unknown unidirectional stream of unknown stream type. + // If parsing the stream type fails, the error is passed to the callback. + // In that case, the stream type will not be set. + UniStreamHijacker func(StreamType, quic.Connection, quic.ReceiveStream, error) (hijacked bool) + + // ConnContext optionally specifies a function that modifies + // the context used for a new connection c. The provided ctx + // has a ServerContextKey value. + ConnContext func(ctx context.Context, c quic.Connection) context.Context + + mutex sync.RWMutex + listeners map[*QUICEarlyListener]listenerInfo + + closed bool + + altSvcHeader string + + logger utils.Logger +} + +// ListenAndServe listens on the UDP address s.Addr and calls s.Handler to handle HTTP/3 requests on incoming connections. +// +// If s.Addr is blank, ":https" is used. +func (s *Server) ListenAndServe() error { + return s.serveConn(s.TLSConfig, nil) +} + +// ListenAndServeTLS listens on the UDP address s.Addr and calls s.Handler to handle HTTP/3 requests on incoming connections. +// +// If s.Addr is blank, ":https" is used. +func (s *Server) ListenAndServeTLS(certFile, keyFile string) error { + var err error + certs := make([]tls.Certificate, 1) + certs[0], err = tls.LoadX509KeyPair(certFile, keyFile) + if err != nil { + return err + } + // We currently only use the cert-related stuff from tls.Config, + // so we don't need to make a full copy. + config := &tls.Config{ + Certificates: certs, + } + return s.serveConn(config, nil) +} + +// Serve an existing UDP connection. +// It is possible to reuse the same connection for outgoing connections. +// Closing the server does not close the connection. +func (s *Server) Serve(conn net.PacketConn) error { + return s.serveConn(s.TLSConfig, conn) +} + +// ServeQUICConn serves a single QUIC connection. +func (s *Server) ServeQUICConn(conn quic.Connection) error { + s.mutex.Lock() + if s.logger == nil { + s.logger = utils.DefaultLogger.WithPrefix("server") + } + s.mutex.Unlock() + + return s.handleConn(conn) +} + +// ServeListener serves an existing QUIC listener. +// Make sure you use http3.ConfigureTLSConfig to configure a tls.Config +// and use it to construct a http3-friendly QUIC listener. +// Closing the server does close the listener. +// ServeListener always returns a non-nil error. After Shutdown or Close, the returned error is http.ErrServerClosed. +func (s *Server) ServeListener(ln QUICEarlyListener) error { + if err := s.addListener(&ln); err != nil { + return err + } + defer s.removeListener(&ln) + for { + conn, err := ln.Accept(context.Background()) + if err == quic.ErrServerClosed { + return http.ErrServerClosed + } + if err != nil { + return err + } + go func() { + if err := s.handleConn(conn); err != nil { + s.logger.Debugf("handling connection failed: %s", err) + } + }() + } +} + +var errServerWithoutTLSConfig = errors.New("use of http3.Server without TLSConfig") + +func (s *Server) serveConn(tlsConf *tls.Config, conn net.PacketConn) error { + if tlsConf == nil { + return errServerWithoutTLSConfig + } + + s.mutex.Lock() + closed := s.closed + s.mutex.Unlock() + if closed { + return http.ErrServerClosed + } + + baseConf := ConfigureTLSConfig(tlsConf) + quicConf := s.QuicConfig + if quicConf == nil { + quicConf = &quic.Config{Allow0RTT: true} + } else { + quicConf = s.QuicConfig.Clone() + } + if s.EnableDatagrams { + quicConf.EnableDatagrams = true + } + + var ln QUICEarlyListener + var err error + if conn == nil { + addr := s.Addr + if addr == "" { + addr = ":https" + } + ln, err = quicListenAddr(addr, baseConf, quicConf) + } else { + ln, err = quicListen(conn, baseConf, quicConf) + } + if err != nil { + return err + } + return s.ServeListener(ln) +} + +func extractPort(addr string) (int, error) { + _, portStr, err := net.SplitHostPort(addr) + if err != nil { + return 0, err + } + + portInt, err := net.LookupPort("tcp", portStr) + if err != nil { + return 0, err + } + return portInt, nil +} + +func (s *Server) generateAltSvcHeader() { + if len(s.listeners) == 0 { + // Don't announce any ports since no one is listening for connections + s.altSvcHeader = "" + return + } + + // This code assumes that we will use protocol.SupportedVersions if no quic.Config is passed. + supportedVersions := protocol.SupportedVersions + if s.QuicConfig != nil && len(s.QuicConfig.Versions) > 0 { + supportedVersions = s.QuicConfig.Versions + } + + // keep track of which have been seen so we don't yield duplicate values + seen := make(map[string]struct{}, len(supportedVersions)) + var versionStrings []string + for _, version := range supportedVersions { + if v := versionToALPN(version); len(v) > 0 { + if _, ok := seen[v]; !ok { + versionStrings = append(versionStrings, v) + seen[v] = struct{}{} + } + } + } + + var altSvc []string + addPort := func(port int) { + for _, v := range versionStrings { + altSvc = append(altSvc, fmt.Sprintf(`%s=":%d"; ma=2592000`, v, port)) + } + } + + if s.Port != 0 { + // if Port is specified, we must use it instead of the + // listener addresses since there's a reason it's specified. + addPort(s.Port) + } else { + // if we have some listeners assigned, try to find ports + // which we can announce, otherwise nothing should be announced + validPortsFound := false + for _, info := range s.listeners { + if info.port != 0 { + addPort(info.port) + validPortsFound = true + } + } + if !validPortsFound { + if port, err := extractPort(s.Addr); err == nil { + addPort(port) + } + } + } + + s.altSvcHeader = strings.Join(altSvc, ",") +} + +// We store a pointer to interface in the map set. This is safe because we only +// call trackListener via Serve and can track+defer untrack the same pointer to +// local variable there. We never need to compare a Listener from another caller. +func (s *Server) addListener(l *QUICEarlyListener) error { + s.mutex.Lock() + defer s.mutex.Unlock() + + if s.closed { + return http.ErrServerClosed + } + if s.logger == nil { + s.logger = utils.DefaultLogger.WithPrefix("server") + } + if s.listeners == nil { + s.listeners = make(map[*QUICEarlyListener]listenerInfo) + } + + laddr := (*l).Addr() + if port, err := extractPort(laddr.String()); err == nil { + s.listeners[l] = listenerInfo{port} + } else { + s.logger.Errorf("Unable to extract port from listener %s, will not be announced using SetQuicHeaders: %s", laddr, err) + s.listeners[l] = listenerInfo{} + } + s.generateAltSvcHeader() + return nil +} + +func (s *Server) removeListener(l *QUICEarlyListener) { + s.mutex.Lock() + defer s.mutex.Unlock() + delete(s.listeners, l) + s.generateAltSvcHeader() +} + +func (s *Server) handleConn(conn quic.Connection) error { + decoder := qpack.NewDecoder(nil) + + // send a SETTINGS frame + str, err := conn.OpenUniStream() + if err != nil { + return fmt.Errorf("opening the control stream failed: %w", err) + } + b := make([]byte, 0, 64) + b = quicvarint.Append(b, streamTypeControlStream) // stream type + b = (&settingsFrame{ + Datagram: s.EnableDatagrams, + ExtendedConnect: true, + Other: s.AdditionalSettings, + }).Append(b) + str.Write(b) + + go s.handleUnidirectionalStreams(conn) + + // Process all requests immediately. + // It's the client's responsibility to decide which requests are eligible for 0-RTT. + for { + str, err := conn.AcceptStream(context.Background()) + if err != nil { + var appErr *quic.ApplicationError + if errors.As(err, &appErr) && appErr.ErrorCode == quic.ApplicationErrorCode(ErrCodeNoError) { + return nil + } + return fmt.Errorf("accepting stream failed: %w", err) + } + go func() { + rerr := s.handleRequest(conn, str, decoder, func() { + conn.CloseWithError(quic.ApplicationErrorCode(ErrCodeFrameUnexpected), "") + }) + if rerr.err == errHijacked { + return + } + if rerr.err != nil || rerr.streamErr != 0 || rerr.connErr != 0 { + s.logger.Debugf("Handling request failed: %s", err) + if rerr.streamErr != 0 { + str.CancelWrite(quic.StreamErrorCode(rerr.streamErr)) + } + if rerr.connErr != 0 { + var reason string + if rerr.err != nil { + reason = rerr.err.Error() + } + conn.CloseWithError(quic.ApplicationErrorCode(rerr.connErr), reason) + } + return + } + str.Close() + }() + } +} + +func (s *Server) handleUnidirectionalStreams(conn quic.Connection) { + var rcvdControlStream atomic.Bool + + for { + str, err := conn.AcceptUniStream(context.Background()) + if err != nil { + s.logger.Debugf("accepting unidirectional stream failed: %s", err) + return + } + + go func(str quic.ReceiveStream) { + streamType, err := quicvarint.Read(quicvarint.NewReader(str)) + if err != nil { + if s.UniStreamHijacker != nil && s.UniStreamHijacker(StreamType(streamType), conn, str, err) { + return + } + s.logger.Debugf("reading stream type on stream %d failed: %s", str.StreamID(), err) + return + } + // We're only interested in the control stream here. + switch streamType { + case streamTypeControlStream: + case streamTypeQPACKEncoderStream, streamTypeQPACKDecoderStream: + // Our QPACK implementation doesn't use the dynamic table yet. + // TODO: check that only one stream of each type is opened. + return + case streamTypePushStream: // only the server can push + conn.CloseWithError(quic.ApplicationErrorCode(ErrCodeStreamCreationError), "") + return + default: + if s.UniStreamHijacker != nil && s.UniStreamHijacker(StreamType(streamType), conn, str, nil) { + return + } + str.CancelRead(quic.StreamErrorCode(ErrCodeStreamCreationError)) + return + } + // Only a single control stream is allowed. + if isFirstControlStr := rcvdControlStream.CompareAndSwap(false, true); !isFirstControlStr { + conn.CloseWithError(quic.ApplicationErrorCode(ErrCodeStreamCreationError), "duplicate control stream") + return + } + f, err := parseNextFrame(str, nil) + if err != nil { + conn.CloseWithError(quic.ApplicationErrorCode(ErrCodeFrameError), "") + return + } + sf, ok := f.(*settingsFrame) + if !ok { + conn.CloseWithError(quic.ApplicationErrorCode(ErrCodeMissingSettings), "") + return + } + if !sf.Datagram { + return + } + // If datagram support was enabled on our side as well as on the client side, + // we can expect it to have been negotiated both on the transport and on the HTTP/3 layer. + // Note: ConnectionState() will block until the handshake is complete (relevant when using 0-RTT). + if s.EnableDatagrams && !conn.ConnectionState().SupportsDatagrams { + conn.CloseWithError(quic.ApplicationErrorCode(ErrCodeSettingsError), "missing QUIC Datagram support") + } + }(str) + } +} + +func (s *Server) maxHeaderBytes() uint64 { + if s.MaxHeaderBytes <= 0 { + return http.DefaultMaxHeaderBytes + } + return uint64(s.MaxHeaderBytes) +} + +func (s *Server) handleRequest(conn quic.Connection, str quic.Stream, decoder *qpack.Decoder, onFrameError func()) requestError { + var ufh unknownFrameHandlerFunc + if s.StreamHijacker != nil { + ufh = func(ft FrameType, e error) (processed bool, err error) { return s.StreamHijacker(ft, conn, str, e) } + } + frame, err := parseNextFrame(str, ufh) + if err != nil { + if err == errHijacked { + return requestError{err: errHijacked} + } + return newStreamError(ErrCodeRequestIncomplete, err) + } + hf, ok := frame.(*headersFrame) + if !ok { + return newConnError(ErrCodeFrameUnexpected, errors.New("expected first frame to be a HEADERS frame")) + } + if hf.Length > s.maxHeaderBytes() { + return newStreamError(ErrCodeFrameError, fmt.Errorf("HEADERS frame too large: %d bytes (max: %d)", hf.Length, s.maxHeaderBytes())) + } + headerBlock := make([]byte, hf.Length) + if _, err := io.ReadFull(str, headerBlock); err != nil { + return newStreamError(ErrCodeRequestIncomplete, err) + } + hfs, err := decoder.DecodeFull(headerBlock) + if err != nil { + // TODO: use the right error code + return newConnError(ErrCodeGeneralProtocolError, err) + } + req, err := requestFromHeaders(hfs) + if err != nil { + return newStreamError(ErrCodeMessageError, err) + } + + connState := conn.ConnectionState().TLS + + // [UQUIC] copy utls.ConnectionState to crypto/tls.ConnectionState + cryptoConnState := &ctls.ConnectionState{ + Version: connState.Version, + HandshakeComplete: connState.HandshakeComplete, + DidResume: connState.DidResume, + CipherSuite: connState.CipherSuite, + NegotiatedProtocol: connState.NegotiatedProtocol, + NegotiatedProtocolIsMutual: connState.NegotiatedProtocolIsMutual, + ServerName: connState.ServerName, + PeerCertificates: connState.PeerCertificates, + VerifiedChains: connState.VerifiedChains, + SignedCertificateTimestamps: connState.SignedCertificateTimestamps, + OCSPResponse: connState.OCSPResponse, + TLSUnique: connState.TLSUnique, + } + req.TLS = cryptoConnState + // [/UQUIC] + + req.RemoteAddr = conn.RemoteAddr().String() + + // Check that the client doesn't send more data in DATA frames than indicated by the Content-Length header (if set). + // See section 4.1.2 of RFC 9114. + var httpStr Stream + if _, ok := req.Header["Content-Length"]; ok && req.ContentLength >= 0 { + httpStr = newLengthLimitedStream(newStream(str, onFrameError), req.ContentLength) + } else { + httpStr = newStream(str, onFrameError) + } + body := newRequestBody(httpStr) + req.Body = body + + if s.logger.Debug() { + s.logger.Infof("%s %s%s, on stream %d", req.Method, req.Host, req.RequestURI, str.StreamID()) + } else { + s.logger.Infof("%s %s%s", req.Method, req.Host, req.RequestURI) + } + + ctx := str.Context() + ctx = context.WithValue(ctx, ServerContextKey, s) + ctx = context.WithValue(ctx, http.LocalAddrContextKey, conn.LocalAddr()) + ctx = context.WithValue(ctx, RemoteAddrContextKey, conn.RemoteAddr()) + if s.ConnContext != nil { + ctx = s.ConnContext(ctx, conn) + if ctx == nil { + panic("http3: ConnContext returned nil") + } + } + req = req.WithContext(ctx) + r := newResponseWriter(str, conn, s.logger) + if req.Method == http.MethodHead { + r.isHead = true + } + handler := s.Handler + if handler == nil { + handler = http.DefaultServeMux + } + + var panicked bool + func() { + defer func() { + if p := recover(); p != nil { + panicked = true + if p == http.ErrAbortHandler { + return + } + // Copied from net/http/server.go + const size = 64 << 10 + buf := make([]byte, size) + buf = buf[:runtime.Stack(buf, false)] + s.logger.Errorf("http: panic serving: %v\n%s", p, buf) + } + }() + handler.ServeHTTP(r, req) + }() + + if body.wasStreamHijacked() { + return requestError{err: errHijacked} + } + + // only write response when there is no panic + if !panicked { + // response not written to the client yet, set Content-Length + if !r.written { + if _, haveCL := r.header["Content-Length"]; !haveCL { + r.header.Set("Content-Length", strconv.FormatInt(r.numWritten, 10)) + } + } + r.Flush() + } + // If the EOF was read by the handler, CancelRead() is a no-op. + str.CancelRead(quic.StreamErrorCode(ErrCodeNoError)) + + // abort the stream when there is a panic + if panicked { + return newStreamError(ErrCodeInternalError, errPanicked) + } + return requestError{} +} + +// Close the server immediately, aborting requests and sending CONNECTION_CLOSE frames to connected clients. +// Close in combination with ListenAndServe() (instead of Serve()) may race if it is called before a UDP socket is established. +func (s *Server) Close() error { + s.mutex.Lock() + defer s.mutex.Unlock() + + s.closed = true + + var err error + for ln := range s.listeners { + if cerr := (*ln).Close(); cerr != nil && err == nil { + err = cerr + } + } + return err +} + +// CloseGracefully shuts down the server gracefully. The server sends a GOAWAY frame first, then waits for either timeout to trigger, or for all running requests to complete. +// CloseGracefully in combination with ListenAndServe() (instead of Serve()) may race if it is called before a UDP socket is established. +func (s *Server) CloseGracefully(timeout time.Duration) error { + // TODO: implement + return nil +} + +// ErrNoAltSvcPort is the error returned by SetQuicHeaders when no port was found +// for Alt-Svc to announce. This can happen if listening on a PacketConn without a port +// (UNIX socket, for example) and no port is specified in Server.Port or Server.Addr. +var ErrNoAltSvcPort = errors.New("no port can be announced, specify it explicitly using Server.Port or Server.Addr") + +// SetQuicHeaders can be used to set the proper headers that announce that this server supports HTTP/3. +// The values set by default advertise all of the ports the server is listening on, but can be +// changed to a specific port by setting Server.Port before launching the serverr. +// If no listener's Addr().String() returns an address with a valid port, Server.Addr will be used +// to extract the port, if specified. +// For example, a server launched using ListenAndServe on an address with port 443 would set: +// +// Alt-Svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000 +func (s *Server) SetQuicHeaders(hdr http.Header) error { + s.mutex.RLock() + defer s.mutex.RUnlock() + + if s.altSvcHeader == "" { + return ErrNoAltSvcPort + } + // use the map directly to avoid constant canonicalization + // since the key is already canonicalized + hdr["Alt-Svc"] = append(hdr["Alt-Svc"], s.altSvcHeader) + return nil +} + +// ListenAndServeQUIC listens on the UDP network address addr and calls the +// handler for HTTP/3 requests on incoming connections. http.DefaultServeMux is +// used when handler is nil. +func ListenAndServeQUIC(addr, certFile, keyFile string, handler http.Handler) error { + server := &Server{ + Addr: addr, + Handler: handler, + } + return server.ListenAndServeTLS(certFile, keyFile) +} + +// ListenAndServe listens on the given network address for both TLS/TCP and QUIC +// connections in parallel. It returns if one of the two returns an error. +// http.DefaultServeMux is used when handler is nil. +// The correct Alt-Svc headers for QUIC are set. +func ListenAndServe(addr, certFile, keyFile string, handler http.Handler) error { + // Load certs + var err error + certs := make([]tls.Certificate, 1) + certs[0], err = tls.LoadX509KeyPair(certFile, keyFile) + if err != nil { + return err + } + // We currently only use the cert-related stuff from tls.Config, + // so we don't need to make a full copy. + config := &tls.Config{ + Certificates: certs, + } + + if addr == "" { + addr = ":https" + } + + // Open the listeners + udpAddr, err := net.ResolveUDPAddr("udp", addr) + if err != nil { + return err + } + udpConn, err := net.ListenUDP("udp", udpAddr) + if err != nil { + return err + } + defer udpConn.Close() + + if handler == nil { + handler = http.DefaultServeMux + } + // Start the servers + quicServer := &Server{ + TLSConfig: config, + Handler: handler, + } + + hErr := make(chan error, 1) + qErr := make(chan error, 1) + go func() { + hErr <- http.ListenAndServeTLS(addr, certFile, keyFile, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + quicServer.SetQuicHeaders(w.Header()) + handler.ServeHTTP(w, r) + })) + }() + go func() { + qErr <- quicServer.Serve(udpConn) + }() + + select { + case err := <-hErr: + quicServer.Close() + return err + case err := <-qErr: + // Cannot close the HTTP server or wait for requests to complete properly :/ + return err + } +} diff --git a/backend/vendor/github.com/enetx/uquic/http3/u_roundtrip.go b/backend/vendor/github.com/enetx/uquic/http3/u_roundtrip.go new file mode 100644 index 0000000..3ad1b4c --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/http3/u_roundtrip.go @@ -0,0 +1,198 @@ +package http3 + +import ( + "context" + "errors" + "fmt" + "net" + + "github.com/enetx/http" + + quic "github.com/enetx/uquic" + "github.com/enetx/uquic/http3/httpcommon" + tls "github.com/enetx/utls" + "golang.org/x/net/http/httpguts" +) + +type URoundTripper struct { + *RoundTripper + + quicSpec *quic.QUICSpec + uTransportOverride *quic.UTransport +} + +func GetURoundTripper(r *RoundTripper, QUICSpec *quic.QUICSpec, uTransport *quic.UTransport) *URoundTripper { + QUICSpec.UpdateConfig(r.QuicConfig) + + return &URoundTripper{ + RoundTripper: r, + quicSpec: QUICSpec, + uTransportOverride: uTransport, + } +} + +// RoundTripOpt is like RoundTrip, but takes options. +func (r *URoundTripper) RoundTripOpt(req *http.Request, opt RoundTripOpt) (*http.Response, error) { + if req.URL == nil { + closeRequestBody(req) + return nil, errors.New("http3: nil Request.URL") + } + if req.URL.Scheme != "https" { + closeRequestBody(req) + return nil, fmt.Errorf("http3: unsupported protocol scheme: %s", req.URL.Scheme) + } + if req.URL.Host == "" { + closeRequestBody(req) + return nil, errors.New("http3: no Host in request URL") + } + if req.Header == nil { + closeRequestBody(req) + return nil, errors.New("http3: nil Request.Header") + } + for k, vv := range req.Header { + // Skip validation for special header order keys + if k == httpcommon.HeaderOrderKey || k == httpcommon.PHeaderOrderKey { + continue + } + if !httpguts.ValidHeaderFieldName(k) { + return nil, fmt.Errorf("http3: invalid http header field name %q", k) + } + for _, v := range vv { + if !httpguts.ValidHeaderFieldValue(v) { + return nil, fmt.Errorf("http3: invalid http header field value %q for key %v", v, k) + } + } + } + + if req.Method != "" && !validMethod(req.Method) { + closeRequestBody(req) + return nil, fmt.Errorf("http3: invalid method %q", req.Method) + } + + hostname := authorityAddr("https", hostnameFromRequest(req)) + cl, isReused, err := r.getClient(hostname, opt.OnlyCachedConn) + if err != nil { + return nil, err + } + defer cl.useCount.Add(-1) + rsp, err := cl.RoundTripOpt(req, opt) + if err != nil { + r.removeClient(hostname) + if isReused { + if nerr, ok := err.(net.Error); ok && nerr.Timeout() { + return r.RoundTripOpt(req, opt) + } + } + } + return rsp, err +} + +// RoundTrip does a round trip. +func (r *URoundTripper) RoundTrip(req *http.Request) (*http.Response, error) { + return r.RoundTripOpt(req, RoundTripOpt{}) +} + +func (r *URoundTripper) getClient(hostname string, onlyCached bool) (rtc *roundTripCloserWithCount, isReused bool, err error) { + r.mutex.Lock() + defer r.mutex.Unlock() + + if r.clients == nil { + r.clients = make(map[string]*roundTripCloserWithCount) + } + + client, ok := r.clients[hostname] + if !ok { + if onlyCached { + return nil, false, ErrNoCachedConn + } + var err error + newCl := newClient + if r.newClient != nil { + newCl = r.newClient + } + dial := r.Dial + if dial == nil { + if r.transport == nil && r.uTransportOverride == nil { + udpConn, err := net.ListenUDP("udp", nil) + if err != nil { + return nil, false, err + } + r.uTransportOverride = &quic.UTransport{ + Transport: &quic.Transport{ + Conn: udpConn, + }, + QUICSpec: r.quicSpec, + } + } + dial = r.makeDialer() + } + c, err := newCl( + hostname, + r.TLSClientConfig, + &roundTripperOpts{ + EnableDatagram: r.EnableDatagrams, + DisableCompression: r.DisableCompression, + MaxHeaderBytes: r.MaxResponseHeaderBytes, + StreamHijacker: r.StreamHijacker, + UniStreamHijacker: r.UniStreamHijacker, + }, + r.QuicConfig, + dial, + ) + if err != nil { + return nil, false, err + } + client = &roundTripCloserWithCount{roundTripCloser: c} + r.clients[hostname] = client + } else if client.HandshakeComplete() { + isReused = true + } + client.useCount.Add(1) + return client, isReused, nil +} + +func (r *URoundTripper) Close() error { + r.mutex.Lock() + defer r.mutex.Unlock() + for _, client := range r.clients { + if err := client.Close(); err != nil { + return err + } + } + r.clients = nil + if r.transport != nil { + if err := r.transport.Close(); err != nil { + return err + } + if err := r.transport.Conn.Close(); err != nil { + return err + } + r.transport = nil + } + if r.uTransportOverride != nil { + if err := r.uTransportOverride.Close(); err != nil { + return err + } + if err := r.uTransportOverride.Conn.Close(); err != nil { + return err + } + r.uTransportOverride = nil + } + return nil +} + +// makeDialer makes a QUIC dialer using r.udpConn. +func (r *URoundTripper) makeDialer() func(ctx context.Context, addr string, tlsCfg *tls.Config, cfg *quic.Config) (quic.EarlyConnection, error) { + return func(ctx context.Context, addr string, tlsCfg *tls.Config, cfg *quic.Config) (quic.EarlyConnection, error) { + udpAddr, err := net.ResolveUDPAddr("udp", addr) + if err != nil { + return nil, err + } + if r.uTransportOverride != nil { + return r.uTransportOverride.DialEarly(ctx, udpAddr, tlsCfg, cfg) + } else if r.transport == nil { + return nil, errors.New("http3: no QUIC transport available") + } + return r.transport.DialEarly(ctx, udpAddr, tlsCfg, cfg) + } +} diff --git a/backend/vendor/github.com/enetx/uquic/interface.go b/backend/vendor/github.com/enetx/uquic/interface.go new file mode 100644 index 0000000..6bfe132 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/interface.go @@ -0,0 +1,363 @@ +package quic + +import ( + "context" + "errors" + "io" + "net" + "time" + + tls "github.com/enetx/utls" + + "github.com/enetx/uquic/internal/handshake" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/logging" +) + +// The StreamID is the ID of a QUIC stream. +type StreamID = protocol.StreamID + +// A Version is a QUIC version number. +type Version = protocol.Version + +// A VersionNumber is a QUIC version number. +// Deprecated: VersionNumber was renamed to Version. +type VersionNumber = Version + +const ( + // Version1 is RFC 9000 + Version1 = protocol.Version1 + // Version2 is RFC 9369 + Version2 = protocol.Version2 +) + +// A ClientToken is a token received by the client. +// It can be used to skip address validation on future connection attempts. +type ClientToken struct { + data []byte +} + +type TokenStore interface { + // Pop searches for a ClientToken associated with the given key. + // Since tokens are not supposed to be reused, it must remove the token from the cache. + // It returns nil when no token is found. + Pop(key string) (token *ClientToken) + + // Put adds a token to the cache with the given key. It might get called + // multiple times in a connection. + Put(key string, token *ClientToken) +} + +// Err0RTTRejected is the returned from: +// * Open{Uni}Stream{Sync} +// * Accept{Uni}Stream +// * Stream.Read and Stream.Write +// when the server rejects a 0-RTT connection attempt. +var Err0RTTRejected = errors.New("0-RTT rejected") + +// ConnectionTracingKey can be used to associate a ConnectionTracer with a Connection. +// It is set on the Connection.Context() context, +// as well as on the context passed to logging.Tracer.NewConnectionTracer. +var ConnectionTracingKey = connTracingCtxKey{} + +type connTracingCtxKey struct{} + +// QUICVersionContextKey can be used to find out the QUIC version of a TLS handshake from the +// context returned by tls.Config.ClientHelloInfo.Context. +var QUICVersionContextKey = handshake.QUICVersionContextKey + +// Stream is the interface implemented by QUIC streams +// In addition to the errors listed on the Connection, +// calls to stream functions can return a StreamError if the stream is canceled. +type Stream interface { + ReceiveStream + SendStream + // SetDeadline sets the read and write deadlines associated + // with the connection. It is equivalent to calling both + // SetReadDeadline and SetWriteDeadline. + SetDeadline(t time.Time) error +} + +// A ReceiveStream is a unidirectional Receive Stream. +type ReceiveStream interface { + // StreamID returns the stream ID. + StreamID() StreamID + // Read reads data from the stream. + // Read can be made to time out and return a net.Error with Timeout() == true + // after a fixed time limit; see SetDeadline and SetReadDeadline. + // If the stream was canceled by the peer, the error implements the StreamError + // interface, and Canceled() == true. + // If the connection was closed due to a timeout, the error satisfies + // the net.Error interface, and Timeout() will be true. + io.Reader + // CancelRead aborts receiving on this stream. + // It will ask the peer to stop transmitting stream data. + // Read will unblock immediately, and future Read calls will fail. + // When called multiple times or after reading the io.EOF it is a no-op. + CancelRead(StreamErrorCode) + // SetReadDeadline sets the deadline for future Read calls and + // any currently-blocked Read call. + // A zero value for t means Read will not time out. + + SetReadDeadline(t time.Time) error +} + +// A SendStream is a unidirectional Send Stream. +type SendStream interface { + // StreamID returns the stream ID. + StreamID() StreamID + // Write writes data to the stream. + // Write can be made to time out and return a net.Error with Timeout() == true + // after a fixed time limit; see SetDeadline and SetWriteDeadline. + // If the stream was canceled by the peer, the error implements the StreamError + // interface, and Canceled() == true. + // If the connection was closed due to a timeout, the error satisfies + // the net.Error interface, and Timeout() will be true. + io.Writer + // Close closes the write-direction of the stream. + // Future calls to Write are not permitted after calling Close. + // It must not be called concurrently with Write. + // It must not be called after calling CancelWrite. + io.Closer + // CancelWrite aborts sending on this stream. + // Data already written, but not yet delivered to the peer is not guaranteed to be delivered reliably. + // Write will unblock immediately, and future calls to Write will fail. + // When called multiple times or after closing the stream it is a no-op. + CancelWrite(StreamErrorCode) + // The Context is canceled as soon as the write-side of the stream is closed. + // This happens when Close() or CancelWrite() is called, or when the peer + // cancels the read-side of their stream. + // The cancellation cause is set to the error that caused the stream to + // close, or `context.Canceled` in case the stream is closed without error. + Context() context.Context + // SetWriteDeadline sets the deadline for future Write calls + // and any currently-blocked Write call. + // Even if write times out, it may return n > 0, indicating that + // some data was successfully written. + // A zero value for t means Write will not time out. + SetWriteDeadline(t time.Time) error +} + +// A Connection is a QUIC connection between two peers. +// Calls to the connection (and to streams) can return the following types of errors: +// * ApplicationError: for errors triggered by the application running on top of QUIC +// * TransportError: for errors triggered by the QUIC transport (in many cases a misbehaving peer) +// * IdleTimeoutError: when the peer goes away unexpectedly (this is a net.Error timeout error) +// * HandshakeTimeoutError: when the cryptographic handshake takes too long (this is a net.Error timeout error) +// * StatelessResetError: when we receive a stateless reset (this is a net.Error temporary error) +// * VersionNegotiationError: returned by the client, when there's no version overlap between the peers +type Connection interface { + // AcceptStream returns the next stream opened by the peer, blocking until one is available. + // If the connection was closed due to a timeout, the error satisfies + // the net.Error interface, and Timeout() will be true. + AcceptStream(context.Context) (Stream, error) + // AcceptUniStream returns the next unidirectional stream opened by the peer, blocking until one is available. + // If the connection was closed due to a timeout, the error satisfies + // the net.Error interface, and Timeout() will be true. + AcceptUniStream(context.Context) (ReceiveStream, error) + // OpenStream opens a new bidirectional QUIC stream. + // There is no signaling to the peer about new streams: + // The peer can only accept the stream after data has been sent on the stream. + // If the error is non-nil, it satisfies the net.Error interface. + // When reaching the peer's stream limit, err.Temporary() will be true. + // If the connection was closed due to a timeout, Timeout() will be true. + OpenStream() (Stream, error) + // OpenStreamSync opens a new bidirectional QUIC stream. + // It blocks until a new stream can be opened. + // There is no signaling to the peer about new streams: + // The peer can only accept the stream after data has been sent on the stream, + // or the stream has been reset or closed. + // If the error is non-nil, it satisfies the net.Error interface. + // If the connection was closed due to a timeout, Timeout() will be true. + OpenStreamSync(context.Context) (Stream, error) + // OpenUniStream opens a new outgoing unidirectional QUIC stream. + // If the error is non-nil, it satisfies the net.Error interface. + // When reaching the peer's stream limit, Temporary() will be true. + // If the connection was closed due to a timeout, Timeout() will be true. + OpenUniStream() (SendStream, error) + // OpenUniStreamSync opens a new outgoing unidirectional QUIC stream. + // It blocks until a new stream can be opened. + // If the error is non-nil, it satisfies the net.Error interface. + // If the connection was closed due to a timeout, Timeout() will be true. + OpenUniStreamSync(context.Context) (SendStream, error) + // LocalAddr returns the local address. + LocalAddr() net.Addr + // RemoteAddr returns the address of the peer. + RemoteAddr() net.Addr + // CloseWithError closes the connection with an error. + // The error string will be sent to the peer. + CloseWithError(ApplicationErrorCode, string) error + // Context returns a context that is cancelled when the connection is closed. + // The cancellation cause is set to the error that caused the connection to + // close, or `context.Canceled` in case the listener is closed first. + Context() context.Context + // ConnectionState returns basic details about the QUIC connection. + // Warning: This API should not be considered stable and might change soon. + ConnectionState() ConnectionState + + // SendDatagram sends a message using a QUIC datagram, as specified in RFC 9221. + // There is no delivery guarantee for DATAGRAM frames, they are not retransmitted if lost. + // The payload of the datagram needs to fit into a single QUIC packet. + // In addition, a datagram may be dropped before being sent out if the available packet size suddenly decreases. + // If the payload is too large to be sent at the current time, a DatagramTooLargeError is returned. + SendDatagram(payload []byte) error + // ReceiveDatagram gets a message received in a datagram, as specified in RFC 9221. + ReceiveDatagram(context.Context) ([]byte, error) +} + +// An EarlyConnection is a connection that is handshaking. +// Data sent during the handshake is encrypted using the forward secure keys. +// When using client certificates, the client's identity is only verified +// after completion of the handshake. +type EarlyConnection interface { + Connection + + // HandshakeComplete blocks until the handshake completes (or fails). + // For the client, data sent before completion of the handshake is encrypted with 0-RTT keys. + // For the server, data sent before completion of the handshake is encrypted with 1-RTT keys, + // however the client's identity is only verified once the handshake completes. + HandshakeComplete() <-chan struct{} + + NextConnection() Connection +} + +// StatelessResetKey is a key used to derive stateless reset tokens. +type StatelessResetKey [32]byte + +// TokenGeneratorKey is a key used to encrypt session resumption tokens. +type TokenGeneratorKey = handshake.TokenProtectorKey + +// A ConnectionID is a QUIC Connection ID, as defined in RFC 9000. +// It is not able to handle QUIC Connection IDs longer than 20 bytes, +// as they are allowed by RFC 8999. +type ConnectionID = protocol.ConnectionID + +// ConnectionIDFromBytes interprets b as a Connection ID. It panics if b is +// longer than 20 bytes. +func ConnectionIDFromBytes(b []byte) ConnectionID { + return protocol.ParseConnectionID(b) +} + +// A ConnectionIDGenerator is an interface that allows clients to implement their own format +// for the Connection IDs that servers/clients use as SrcConnectionID in QUIC packets. +// +// Connection IDs generated by an implementation should always produce IDs of constant size. +type ConnectionIDGenerator interface { + // GenerateConnectionID generates a new ConnectionID. + // Generated ConnectionIDs should be unique and observers should not be able to correlate two ConnectionIDs. + GenerateConnectionID() (ConnectionID, error) + + // ConnectionIDLen tells what is the length of the ConnectionIDs generated by the implementation of + // this interface. + // Effectively, this means that implementations of ConnectionIDGenerator must always return constant-size + // connection IDs. Valid lengths are between 0 and 20 and calls to GenerateConnectionID. + // 0-length ConnectionsIDs can be used when an endpoint (server or client) does not require multiplexing connections + // in the presence of a connection migration environment. + ConnectionIDLen() int +} + +// Config contains all configuration data needed for a QUIC server or client. +type Config struct { + // GetConfigForClient is called for incoming connections. + // If the error is not nil, the connection attempt is refused. + GetConfigForClient func(info *ClientHelloInfo) (*Config, error) + // The QUIC versions that can be negotiated. + // If not set, it uses all versions available. + Versions []Version + // HandshakeIdleTimeout is the idle timeout before completion of the handshake. + // If we don't receive any packet from the peer within this time, the connection attempt is aborted. + // Additionally, if the handshake doesn't complete in twice this time, the connection attempt is also aborted. + // If this value is zero, the timeout is set to 5 seconds. + HandshakeIdleTimeout time.Duration + // MaxIdleTimeout is the maximum duration that may pass without any incoming network activity. + // The actual value for the idle timeout is the minimum of this value and the peer's. + // This value only applies after the handshake has completed. + // If the timeout is exceeded, the connection is closed. + // If this value is zero, the timeout is set to 30 seconds. + MaxIdleTimeout time.Duration + // The TokenStore stores tokens received from the server. + // Tokens are used to skip address validation on future connection attempts. + // The key used to store tokens is the ServerName from the tls.Config, if set + // otherwise the token is associated with the server's IP address. + TokenStore TokenStore + // InitialStreamReceiveWindow is the initial size of the stream-level flow control window for receiving data. + // If the application is consuming data quickly enough, the flow control auto-tuning algorithm + // will increase the window up to MaxStreamReceiveWindow. + // If this value is zero, it will default to 512 KB. + // Values larger than the maximum varint (quicvarint.Max) will be clipped to that value. + InitialStreamReceiveWindow uint64 + // MaxStreamReceiveWindow is the maximum stream-level flow control window for receiving data. + // If this value is zero, it will default to 6 MB. + // Values larger than the maximum varint (quicvarint.Max) will be clipped to that value. + MaxStreamReceiveWindow uint64 + // InitialConnectionReceiveWindow is the initial size of the stream-level flow control window for receiving data. + // If the application is consuming data quickly enough, the flow control auto-tuning algorithm + // will increase the window up to MaxConnectionReceiveWindow. + // If this value is zero, it will default to 512 KB. + // Values larger than the maximum varint (quicvarint.Max) will be clipped to that value. + InitialConnectionReceiveWindow uint64 + // MaxConnectionReceiveWindow is the connection-level flow control window for receiving data. + // If this value is zero, it will default to 15 MB. + // Values larger than the maximum varint (quicvarint.Max) will be clipped to that value. + MaxConnectionReceiveWindow uint64 + // AllowConnectionWindowIncrease is called every time the connection flow controller attempts + // to increase the connection flow control window. + // If set, the caller can prevent an increase of the window. Typically, it would do so to + // limit the memory usage. + // To avoid deadlocks, it is not valid to call other functions on the connection or on streams + // in this callback. + AllowConnectionWindowIncrease func(conn Connection, delta uint64) bool + // MaxIncomingStreams is the maximum number of concurrent bidirectional streams that a peer is allowed to open. + // If not set, it will default to 100. + // If set to a negative value, it doesn't allow any bidirectional streams. + // Values larger than 2^60 will be clipped to that value. + MaxIncomingStreams int64 + // MaxIncomingUniStreams is the maximum number of concurrent unidirectional streams that a peer is allowed to open. + // If not set, it will default to 100. + // If set to a negative value, it doesn't allow any unidirectional streams. + // Values larger than 2^60 will be clipped to that value. + MaxIncomingUniStreams int64 + // KeepAlivePeriod defines whether this peer will periodically send a packet to keep the connection alive. + // If set to 0, then no keep alive is sent. Otherwise, the keep alive is sent on that period (or at most + // every half of MaxIdleTimeout, whichever is smaller). + KeepAlivePeriod time.Duration + // DisablePathMTUDiscovery disables Path MTU Discovery (RFC 8899). + // This allows the sending of QUIC packets that fully utilize the available MTU of the path. + // Path MTU discovery is only available on systems that allow setting of the Don't Fragment (DF) bit. + // If unavailable or disabled, packets will be at most 1252 (IPv4) / 1232 (IPv6) bytes in size. + DisablePathMTUDiscovery bool + // Allow0RTT allows the application to decide if a 0-RTT connection attempt should be accepted. + // Only valid for the server. + Allow0RTT bool + // Enable QUIC datagram support (RFC 9221). + EnableDatagrams bool + Tracer func(context.Context, logging.Perspective, ConnectionID) *logging.ConnectionTracer +} + +// ClientHelloInfo contains information about an incoming connection attempt. +type ClientHelloInfo struct { + // RemoteAddr is the remote address on the Initial packet. + // Unless AddrVerified is set, the address is not yet verified, and could be a spoofed IP address. + RemoteAddr net.Addr + // AddrVerified says if the remote address was verified using QUIC's Retry mechanism. + // Note that the Retry mechanism costs one network roundtrip, + // and is not performed unless Transport.MaxUnvalidatedHandshakes is surpassed. + AddrVerified bool +} + +// ConnectionState records basic details about a QUIC connection +type ConnectionState struct { + // TLS contains information about the TLS connection state, incl. the tls.ConnectionState. + TLS tls.ConnectionState + // SupportsDatagrams says if support for QUIC datagrams (RFC 9221) was negotiated. + // This requires both nodes to support and enable the datagram extensions (via Config.EnableDatagrams). + // If datagram support was negotiated, datagrams can be sent and received using the + // SendDatagram and ReceiveDatagram methods on the Connection. + SupportsDatagrams bool + // Used0RTT says if 0-RTT resumption was used. + Used0RTT bool + // Version is the QUIC version of the QUIC connection. + Version Version + // GSO says if generic segmentation offload is used + GSO bool +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/ack_eliciting.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/ack_eliciting.go new file mode 100644 index 0000000..ec5b543 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/ack_eliciting.go @@ -0,0 +1,20 @@ +package ackhandler + +import "github.com/enetx/uquic/internal/wire" + +// IsFrameAckEliciting returns true if the frame is ack-eliciting. +func IsFrameAckEliciting(f wire.Frame) bool { + _, isAck := f.(*wire.AckFrame) + _, isConnectionClose := f.(*wire.ConnectionCloseFrame) + return !isAck && !isConnectionClose +} + +// HasAckElicitingFrames returns true if at least one frame is ack-eliciting. +func HasAckElicitingFrames(fs []Frame) bool { + for _, f := range fs { + if IsFrameAckEliciting(f.Frame) { + return true + } + } + return false +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/ackhandler.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/ackhandler.go new file mode 100644 index 0000000..aa5cba6 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/ackhandler.go @@ -0,0 +1,24 @@ +package ackhandler + +import ( + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/logging" +) + +// NewAckHandler creates a new SentPacketHandler and a new ReceivedPacketHandler. +// clientAddressValidated indicates whether the address was validated beforehand by an address validation token. +// clientAddressValidated has no effect for a client. +func NewAckHandler( + initialPacketNumber protocol.PacketNumber, + initialMaxDatagramSize protocol.ByteCount, + rttStats *utils.RTTStats, + clientAddressValidated bool, + enableECN bool, + pers protocol.Perspective, + tracer *logging.ConnectionTracer, + logger utils.Logger, +) (SentPacketHandler, ReceivedPacketHandler) { + sph := newSentPacketHandler(initialPacketNumber, initialMaxDatagramSize, rttStats, clientAddressValidated, enableECN, pers, tracer, logger) + return sph, newReceivedPacketHandler(sph, logger) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/ecn.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/ecn.go new file mode 100644 index 0000000..0955beb --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/ecn.go @@ -0,0 +1,296 @@ +package ackhandler + +import ( + "fmt" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/logging" +) + +type ecnState uint8 + +const ( + ecnStateInitial ecnState = iota + ecnStateTesting + ecnStateUnknown + ecnStateCapable + ecnStateFailed +) + +// must fit into an uint8, otherwise numSentTesting and numLostTesting must have a larger type +const numECNTestingPackets = 10 + +type ecnHandler interface { + SentPacket(protocol.PacketNumber, protocol.ECN) + Mode() protocol.ECN + HandleNewlyAcked(packets []*packet, ect0, ect1, ecnce int64) (congested bool) + LostPacket(protocol.PacketNumber) +} + +// The ecnTracker performs ECN validation of a path. +// Once failed, it doesn't do any re-validation of the path. +// It is designed only work for 1-RTT packets, it doesn't handle multiple packet number spaces. +// In order to avoid revealing any internal state to on-path observers, +// callers should make sure to start using ECN (i.e. calling Mode) for the very first 1-RTT packet sent. +// The validation logic implemented here strictly follows the algorithm described in RFC 9000 section 13.4.2 and A.4. +type ecnTracker struct { + state ecnState + numSentTesting, numLostTesting uint8 + + firstTestingPacket protocol.PacketNumber + lastTestingPacket protocol.PacketNumber + firstCapablePacket protocol.PacketNumber + + numSentECT0, numSentECT1 int64 + numAckedECT0, numAckedECT1, numAckedECNCE int64 + + tracer *logging.ConnectionTracer + logger utils.Logger +} + +var _ ecnHandler = &ecnTracker{} + +func newECNTracker(logger utils.Logger, tracer *logging.ConnectionTracer) *ecnTracker { + return &ecnTracker{ + firstTestingPacket: protocol.InvalidPacketNumber, + lastTestingPacket: protocol.InvalidPacketNumber, + firstCapablePacket: protocol.InvalidPacketNumber, + state: ecnStateInitial, + logger: logger, + tracer: tracer, + } +} + +func (e *ecnTracker) SentPacket(pn protocol.PacketNumber, ecn protocol.ECN) { + //nolint:exhaustive // These are the only ones we need to take care of. + switch ecn { + case protocol.ECNNon: + return + case protocol.ECT0: + e.numSentECT0++ + case protocol.ECT1: + e.numSentECT1++ + case protocol.ECNUnsupported: + if e.state != ecnStateFailed { + panic("didn't expect ECN to be unsupported") + } + default: + panic(fmt.Sprintf("sent packet with unexpected ECN marking: %s", ecn)) + } + + if e.state == ecnStateCapable && e.firstCapablePacket == protocol.InvalidPacketNumber { + e.firstCapablePacket = pn + } + + if e.state != ecnStateTesting { + return + } + + e.numSentTesting++ + if e.firstTestingPacket == protocol.InvalidPacketNumber { + e.firstTestingPacket = pn + } + if e.numSentECT0+e.numSentECT1 >= numECNTestingPackets { + if e.tracer != nil && e.tracer.ECNStateUpdated != nil { + e.tracer.ECNStateUpdated(logging.ECNStateUnknown, logging.ECNTriggerNoTrigger) + } + e.state = ecnStateUnknown + e.lastTestingPacket = pn + } +} + +func (e *ecnTracker) Mode() protocol.ECN { + switch e.state { + case ecnStateInitial: + if e.tracer != nil && e.tracer.ECNStateUpdated != nil { + e.tracer.ECNStateUpdated(logging.ECNStateTesting, logging.ECNTriggerNoTrigger) + } + e.state = ecnStateTesting + return e.Mode() + case ecnStateTesting, ecnStateCapable: + return protocol.ECT0 + case ecnStateUnknown, ecnStateFailed: + return protocol.ECNNon + default: + panic(fmt.Sprintf("unknown ECN state: %d", e.state)) + } +} + +func (e *ecnTracker) LostPacket(pn protocol.PacketNumber) { + if e.state != ecnStateTesting && e.state != ecnStateUnknown { + return + } + if !e.isTestingPacket(pn) { + return + } + e.numLostTesting++ + // Only proceed if we have sent all 10 testing packets. + if e.state != ecnStateUnknown { + return + } + if e.numLostTesting >= e.numSentTesting { + e.logger.Debugf("Disabling ECN. All testing packets were lost.") + if e.tracer != nil && e.tracer.ECNStateUpdated != nil { + e.tracer.ECNStateUpdated(logging.ECNStateFailed, logging.ECNFailedLostAllTestingPackets) + } + e.state = ecnStateFailed + return + } + // Path validation also fails if some testing packets are lost, and all other testing packets where CE-marked + e.failIfMangled() +} + +// HandleNewlyAcked handles the ECN counts on an ACK frame. +// It must only be called for ACK frames that increase the largest acknowledged packet number, +// see section 13.4.2.1 of RFC 9000. +func (e *ecnTracker) HandleNewlyAcked(packets []*packet, ect0, ect1, ecnce int64) (congested bool) { + if e.state == ecnStateFailed { + return false + } + + // ECN validation can fail if the received total count for either ECT(0) or ECT(1) exceeds + // the total number of packets sent with each corresponding ECT codepoint. + if ect0 > e.numSentECT0 || ect1 > e.numSentECT1 { + e.logger.Debugf("Disabling ECN. Received more ECT(0) / ECT(1) acknowledgements than packets sent.") + if e.tracer != nil && e.tracer.ECNStateUpdated != nil { + e.tracer.ECNStateUpdated(logging.ECNStateFailed, logging.ECNFailedMoreECNCountsThanSent) + } + e.state = ecnStateFailed + return false + } + + // Count ECT0 and ECT1 marks that we used when sending the packets that are now being acknowledged. + var ackedECT0, ackedECT1 int64 + for _, p := range packets { + //nolint:exhaustive // We only ever send ECT(0) and ECT(1). + switch e.ecnMarking(p.PacketNumber) { + case protocol.ECT0: + ackedECT0++ + case protocol.ECT1: + ackedECT1++ + } + } + + // If an ACK frame newly acknowledges a packet that the endpoint sent with either the ECT(0) or ECT(1) + // codepoint set, ECN validation fails if the corresponding ECN counts are not present in the ACK frame. + // This check detects: + // * paths that bleach all ECN marks, and + // * peers that don't report any ECN counts + if (ackedECT0 > 0 || ackedECT1 > 0) && ect0 == 0 && ect1 == 0 && ecnce == 0 { + e.logger.Debugf("Disabling ECN. ECN-marked packet acknowledged, but no ECN counts on ACK frame.") + if e.tracer != nil && e.tracer.ECNStateUpdated != nil { + e.tracer.ECNStateUpdated(logging.ECNStateFailed, logging.ECNFailedNoECNCounts) + } + e.state = ecnStateFailed + return false + } + + // Determine the increase in ECT0, ECT1 and ECNCE marks + newECT0 := ect0 - e.numAckedECT0 + newECT1 := ect1 - e.numAckedECT1 + newECNCE := ecnce - e.numAckedECNCE + + // We're only processing ACKs that increase the Largest Acked. + // Therefore, the ECN counters should only ever increase. + // Any decrease means that the peer's counting logic is broken. + if newECT0 < 0 || newECT1 < 0 || newECNCE < 0 { + e.logger.Debugf("Disabling ECN. ECN counts decreased unexpectedly.") + if e.tracer != nil && e.tracer.ECNStateUpdated != nil { + e.tracer.ECNStateUpdated(logging.ECNStateFailed, logging.ECNFailedDecreasedECNCounts) + } + e.state = ecnStateFailed + return false + } + + // ECN validation also fails if the sum of the increase in ECT(0) and ECN-CE counts is less than the number + // of newly acknowledged packets that were originally sent with an ECT(0) marking. + // This could be the result of (partial) bleaching. + if newECT0+newECNCE < ackedECT0 { + e.logger.Debugf("Disabling ECN. Received less ECT(0) + ECN-CE than packets sent with ECT(0).") + if e.tracer != nil && e.tracer.ECNStateUpdated != nil { + e.tracer.ECNStateUpdated(logging.ECNStateFailed, logging.ECNFailedTooFewECNCounts) + } + e.state = ecnStateFailed + return false + } + // Similarly, ECN validation fails if the sum of the increases to ECT(1) and ECN-CE counts is less than + // the number of newly acknowledged packets sent with an ECT(1) marking. + if newECT1+newECNCE < ackedECT1 { + e.logger.Debugf("Disabling ECN. Received less ECT(1) + ECN-CE than packets sent with ECT(1).") + if e.tracer != nil && e.tracer.ECNStateUpdated != nil { + e.tracer.ECNStateUpdated(logging.ECNStateFailed, logging.ECNFailedTooFewECNCounts) + } + e.state = ecnStateFailed + return false + } + + // update our counters + e.numAckedECT0 = ect0 + e.numAckedECT1 = ect1 + e.numAckedECNCE = ecnce + + // Detect mangling (a path remarking all ECN-marked testing packets as CE), + // once all 10 testing packets have been sent out. + if e.state == ecnStateUnknown { + e.failIfMangled() + if e.state == ecnStateFailed { + return false + } + } + if e.state == ecnStateTesting || e.state == ecnStateUnknown { + var ackedTestingPacket bool + for _, p := range packets { + if e.isTestingPacket(p.PacketNumber) { + ackedTestingPacket = true + break + } + } + // This check won't succeed if the path is mangling ECN-marks (i.e. rewrites all ECN-marked packets to CE). + if ackedTestingPacket && (newECT0 > 0 || newECT1 > 0) { + e.logger.Debugf("ECN capability confirmed.") + if e.tracer != nil && e.tracer.ECNStateUpdated != nil { + e.tracer.ECNStateUpdated(logging.ECNStateCapable, logging.ECNTriggerNoTrigger) + } + e.state = ecnStateCapable + } + } + + // Don't trust CE marks before having confirmed ECN capability of the path. + // Otherwise, mangling would be misinterpreted as actual congestion. + return e.state == ecnStateCapable && newECNCE > 0 +} + +// failIfMangled fails ECN validation if all testing packets are lost or CE-marked. +func (e *ecnTracker) failIfMangled() { + numAckedECNCE := e.numAckedECNCE + int64(e.numLostTesting) + if e.numSentECT0+e.numSentECT1 > numAckedECNCE { + return + } + if e.tracer != nil && e.tracer.ECNStateUpdated != nil { + e.tracer.ECNStateUpdated(logging.ECNStateFailed, logging.ECNFailedManglingDetected) + } + e.state = ecnStateFailed +} + +func (e *ecnTracker) ecnMarking(pn protocol.PacketNumber) protocol.ECN { + if pn < e.firstTestingPacket || e.firstTestingPacket == protocol.InvalidPacketNumber { + return protocol.ECNNon + } + if pn < e.lastTestingPacket || e.lastTestingPacket == protocol.InvalidPacketNumber { + return protocol.ECT0 + } + if pn < e.firstCapablePacket || e.firstCapablePacket == protocol.InvalidPacketNumber { + return protocol.ECNNon + } + // We don't need to deal with the case when ECN validation fails, + // since we're ignoring any ECN counts reported in ACK frames in that case. + return protocol.ECT0 +} + +func (e *ecnTracker) isTestingPacket(pn protocol.PacketNumber) bool { + if e.firstTestingPacket == protocol.InvalidPacketNumber { + return false + } + return pn >= e.firstTestingPacket && (pn <= e.lastTestingPacket || e.lastTestingPacket == protocol.InvalidPacketNumber) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/frame.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/frame.go new file mode 100644 index 0000000..ecd00d8 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/frame.go @@ -0,0 +1,21 @@ +package ackhandler + +import ( + "github.com/enetx/uquic/internal/wire" +) + +// FrameHandler handles the acknowledgement and the loss of a frame. +type FrameHandler interface { + OnAcked(wire.Frame) + OnLost(wire.Frame) +} + +type Frame struct { + Frame wire.Frame // nil if the frame has already been acknowledged in another packet + Handler FrameHandler +} + +type StreamFrame struct { + Frame *wire.StreamFrame + Handler FrameHandler +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/interfaces.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/interfaces.go new file mode 100644 index 0000000..2cad69e --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/interfaces.go @@ -0,0 +1,53 @@ +package ackhandler + +import ( + "time" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/wire" +) + +// SentPacketHandler handles ACKs received for outgoing packets +type SentPacketHandler interface { + // SentPacket may modify the packet + SentPacket(t time.Time, pn, largestAcked protocol.PacketNumber, streamFrames []StreamFrame, frames []Frame, encLevel protocol.EncryptionLevel, ecn protocol.ECN, size protocol.ByteCount, isPathMTUProbePacket bool) + // ReceivedAck processes an ACK frame. + // It does not store a copy of the frame. + ReceivedAck(f *wire.AckFrame, encLevel protocol.EncryptionLevel, rcvTime time.Time) (bool /* 1-RTT packet acked */, error) + ReceivedBytes(protocol.ByteCount) + DropPackets(protocol.EncryptionLevel) + ResetForRetry(rcvTime time.Time) error + SetHandshakeConfirmed() + + // The SendMode determines if and what kind of packets can be sent. + SendMode(now time.Time) SendMode + // TimeUntilSend is the time when the next packet should be sent. + // It is used for pacing packets. + TimeUntilSend() time.Time + SetMaxDatagramSize(count protocol.ByteCount) + + // only to be called once the handshake is complete + QueueProbePacket(protocol.EncryptionLevel) bool /* was a packet queued */ + + ECNMode(isShortHeaderPacket bool) protocol.ECN // isShortHeaderPacket should only be true for non-coalesced 1-RTT packets + PeekPacketNumber(protocol.EncryptionLevel) (protocol.PacketNumber, protocol.PacketNumberLen) + PopPacketNumber(protocol.EncryptionLevel) protocol.PacketNumber + + GetLossDetectionTimeout() time.Time + OnLossDetectionTimeout() error +} + +type sentPacketTracker interface { + GetLowestPacketNotConfirmedAcked() protocol.PacketNumber + ReceivedPacket(protocol.EncryptionLevel) +} + +// ReceivedPacketHandler handles ACKs needed to send for incoming packets +type ReceivedPacketHandler interface { + IsPotentiallyDuplicate(protocol.PacketNumber, protocol.EncryptionLevel) bool + ReceivedPacket(pn protocol.PacketNumber, ecn protocol.ECN, encLevel protocol.EncryptionLevel, rcvTime time.Time, ackEliciting bool) error + DropPackets(protocol.EncryptionLevel) + + GetAlarmTimeout() time.Time + GetAckFrame(encLevel protocol.EncryptionLevel, onlyIfQueued bool) *wire.AckFrame +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/mockgen.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/mockgen.go new file mode 100644 index 0000000..e642b99 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/mockgen.go @@ -0,0 +1,9 @@ +//go:build gomock || generate + +package ackhandler + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package ackhandler -destination mock_sent_packet_tracker_test.go github.com/quic-go/quic-go/internal/ackhandler SentPacketTracker" +type SentPacketTracker = sentPacketTracker + +//go:generate sh -c "go run go.uber.org/mock/mockgen -build_flags=\"-tags=gomock\" -package ackhandler -destination mock_ecn_handler_test.go github.com/enetx/uquic/internal/ackhandler ECNHandler" +type ECNHandler = ecnHandler diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/packet.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/packet.go new file mode 100644 index 0000000..3ac3f3a --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/packet.go @@ -0,0 +1,55 @@ +package ackhandler + +import ( + "sync" + "time" + + "github.com/enetx/uquic/internal/protocol" +) + +// A Packet is a packet +type packet struct { + SendTime time.Time + PacketNumber protocol.PacketNumber + StreamFrames []StreamFrame + Frames []Frame + LargestAcked protocol.PacketNumber // InvalidPacketNumber if the packet doesn't contain an ACK + Length protocol.ByteCount + EncryptionLevel protocol.EncryptionLevel + + IsPathMTUProbePacket bool // We don't report the loss of Path MTU probe packets to the congestion controller. + + includedInBytesInFlight bool + declaredLost bool + skippedPacket bool +} + +func (p *packet) outstanding() bool { + return !p.declaredLost && !p.skippedPacket && !p.IsPathMTUProbePacket +} + +var packetPool = sync.Pool{New: func() any { return &packet{} }} + +func getPacket() *packet { + p := packetPool.Get().(*packet) + p.PacketNumber = 0 + p.StreamFrames = nil + p.Frames = nil + p.LargestAcked = 0 + p.Length = 0 + p.EncryptionLevel = protocol.EncryptionLevel(0) + p.SendTime = time.Time{} + p.IsPathMTUProbePacket = false + p.includedInBytesInFlight = false + p.declaredLost = false + p.skippedPacket = false + return p +} + +// We currently only return Packets back into the pool when they're acknowledged (not when they're lost). +// This simplifies the code, and gives the vast majority of the performance benefit we can gain from using the pool. +func putPacket(p *packet) { + p.Frames = nil + p.StreamFrames = nil + packetPool.Put(p) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/packet_number_generator.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/packet_number_generator.go new file mode 100644 index 0000000..805997b --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/packet_number_generator.go @@ -0,0 +1,84 @@ +package ackhandler + +import ( + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" +) + +type packetNumberGenerator interface { + Peek() protocol.PacketNumber + // Pop pops the packet number. + // It reports if the packet number (before the one just popped) was skipped. + // It never skips more than one packet number in a row. + Pop() (skipped bool, _ protocol.PacketNumber) +} + +type sequentialPacketNumberGenerator struct { + next protocol.PacketNumber +} + +var _ packetNumberGenerator = &sequentialPacketNumberGenerator{} + +func newSequentialPacketNumberGenerator(initial protocol.PacketNumber) packetNumberGenerator { + return &sequentialPacketNumberGenerator{next: initial} +} + +func (p *sequentialPacketNumberGenerator) Peek() protocol.PacketNumber { + return p.next +} + +func (p *sequentialPacketNumberGenerator) Pop() (bool, protocol.PacketNumber) { + next := p.next + p.next++ + return false, next +} + +// The skippingPacketNumberGenerator generates the packet number for the next packet +// it randomly skips a packet number every averagePeriod packets (on average). +// It is guaranteed to never skip two consecutive packet numbers. +type skippingPacketNumberGenerator struct { + period protocol.PacketNumber + maxPeriod protocol.PacketNumber + + next protocol.PacketNumber + nextToSkip protocol.PacketNumber + + rng utils.Rand +} + +var _ packetNumberGenerator = &skippingPacketNumberGenerator{} + +func newSkippingPacketNumberGenerator(initial, initialPeriod, maxPeriod protocol.PacketNumber) packetNumberGenerator { + g := &skippingPacketNumberGenerator{ + next: initial, + period: initialPeriod, + maxPeriod: maxPeriod, + } + g.generateNewSkip() + return g +} + +func (p *skippingPacketNumberGenerator) Peek() protocol.PacketNumber { + if p.next == p.nextToSkip { + return p.next + 1 + } + return p.next +} + +func (p *skippingPacketNumberGenerator) Pop() (bool, protocol.PacketNumber) { + next := p.next + if p.next == p.nextToSkip { + next++ + p.next += 2 + p.generateNewSkip() + return true, next + } + p.next++ // generate a new packet number for the next packet + return false, next +} + +func (p *skippingPacketNumberGenerator) generateNewSkip() { + // make sure that there are never two consecutive packet numbers that are skipped + p.nextToSkip = p.next + 3 + protocol.PacketNumber(p.rng.Int31n(int32(2*p.period))) + p.period = min(2*p.period, p.maxPeriod) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/received_packet_handler.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/received_packet_handler.go new file mode 100644 index 0000000..4317cc7 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/received_packet_handler.go @@ -0,0 +1,125 @@ +package ackhandler + +import ( + "fmt" + "time" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/internal/wire" +) + +type receivedPacketHandler struct { + sentPackets sentPacketTracker + + initialPackets *receivedPacketTracker + handshakePackets *receivedPacketTracker + appDataPackets appDataReceivedPacketTracker + + lowest1RTTPacket protocol.PacketNumber +} + +var _ ReceivedPacketHandler = &receivedPacketHandler{} + +func newReceivedPacketHandler(sentPackets sentPacketTracker, logger utils.Logger) ReceivedPacketHandler { + return &receivedPacketHandler{ + sentPackets: sentPackets, + initialPackets: newReceivedPacketTracker(), + handshakePackets: newReceivedPacketTracker(), + appDataPackets: *newAppDataReceivedPacketTracker(logger), + lowest1RTTPacket: protocol.InvalidPacketNumber, + } +} + +func (h *receivedPacketHandler) ReceivedPacket( + pn protocol.PacketNumber, + ecn protocol.ECN, + encLevel protocol.EncryptionLevel, + rcvTime time.Time, + ackEliciting bool, +) error { + h.sentPackets.ReceivedPacket(encLevel) + switch encLevel { + case protocol.EncryptionInitial: + return h.initialPackets.ReceivedPacket(pn, ecn, rcvTime, ackEliciting) + case protocol.EncryptionHandshake: + // The Handshake packet number space might already have been dropped as a result + // of processing the CRYPTO frame that was contained in this packet. + if h.handshakePackets == nil { + return nil + } + return h.handshakePackets.ReceivedPacket(pn, ecn, rcvTime, ackEliciting) + case protocol.Encryption0RTT: + if h.lowest1RTTPacket != protocol.InvalidPacketNumber && pn > h.lowest1RTTPacket { + return fmt.Errorf("received packet number %d on a 0-RTT packet after receiving %d on a 1-RTT packet", pn, h.lowest1RTTPacket) + } + return h.appDataPackets.ReceivedPacket(pn, ecn, rcvTime, ackEliciting) + case protocol.Encryption1RTT: + if h.lowest1RTTPacket == protocol.InvalidPacketNumber || pn < h.lowest1RTTPacket { + h.lowest1RTTPacket = pn + } + if err := h.appDataPackets.ReceivedPacket(pn, ecn, rcvTime, ackEliciting); err != nil { + return err + } + h.appDataPackets.IgnoreBelow(h.sentPackets.GetLowestPacketNotConfirmedAcked()) + return nil + default: + panic(fmt.Sprintf("received packet with unknown encryption level: %s", encLevel)) + } +} + +func (h *receivedPacketHandler) DropPackets(encLevel protocol.EncryptionLevel) { + //nolint:exhaustive // 1-RTT packet number space is never dropped. + switch encLevel { + case protocol.EncryptionInitial: + h.initialPackets = nil + case protocol.EncryptionHandshake: + h.handshakePackets = nil + case protocol.Encryption0RTT: + // Nothing to do here. + // If we are rejecting 0-RTT, no 0-RTT packets will have been decrypted. + default: + panic(fmt.Sprintf("Cannot drop keys for encryption level %s", encLevel)) + } +} + +func (h *receivedPacketHandler) GetAlarmTimeout() time.Time { + return h.appDataPackets.GetAlarmTimeout() +} + +func (h *receivedPacketHandler) GetAckFrame(encLevel protocol.EncryptionLevel, onlyIfQueued bool) *wire.AckFrame { + //nolint:exhaustive // 0-RTT packets can't contain ACK frames. + switch encLevel { + case protocol.EncryptionInitial: + if h.initialPackets != nil { + return h.initialPackets.GetAckFrame() + } + return nil + case protocol.EncryptionHandshake: + if h.handshakePackets != nil { + return h.handshakePackets.GetAckFrame() + } + return nil + case protocol.Encryption1RTT: + return h.appDataPackets.GetAckFrame(onlyIfQueued) + default: + // 0-RTT packets can't contain ACK frames + return nil + } +} + +func (h *receivedPacketHandler) IsPotentiallyDuplicate(pn protocol.PacketNumber, encLevel protocol.EncryptionLevel) bool { + switch encLevel { + case protocol.EncryptionInitial: + if h.initialPackets != nil { + return h.initialPackets.IsPotentiallyDuplicate(pn) + } + case protocol.EncryptionHandshake: + if h.handshakePackets != nil { + return h.handshakePackets.IsPotentiallyDuplicate(pn) + } + case protocol.Encryption0RTT, protocol.Encryption1RTT: + return h.appDataPackets.IsPotentiallyDuplicate(pn) + } + panic("unexpected encryption level") +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/received_packet_history.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/received_packet_history.go new file mode 100644 index 0000000..2b9f22e --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/received_packet_history.go @@ -0,0 +1,151 @@ +package ackhandler + +import ( + "sync" + + "github.com/enetx/uquic/internal/protocol" + list "github.com/enetx/uquic/internal/utils/linkedlist" + "github.com/enetx/uquic/internal/wire" +) + +// interval is an interval from one PacketNumber to the other +type interval struct { + Start protocol.PacketNumber + End protocol.PacketNumber +} + +var intervalElementPool sync.Pool + +func init() { + intervalElementPool = *list.NewPool[interval]() +} + +// The receivedPacketHistory stores if a packet number has already been received. +// It generates ACK ranges which can be used to assemble an ACK frame. +// It does not store packet contents. +type receivedPacketHistory struct { + ranges *list.List[interval] + + deletedBelow protocol.PacketNumber +} + +func newReceivedPacketHistory() *receivedPacketHistory { + return &receivedPacketHistory{ + ranges: list.NewWithPool[interval](&intervalElementPool), + } +} + +// ReceivedPacket registers a packet with PacketNumber p and updates the ranges +func (h *receivedPacketHistory) ReceivedPacket(p protocol.PacketNumber) bool /* is a new packet (and not a duplicate / delayed packet) */ { + // ignore delayed packets, if we already deleted the range + if p < h.deletedBelow { + return false + } + isNew := h.addToRanges(p) + h.maybeDeleteOldRanges() + return isNew +} + +func (h *receivedPacketHistory) addToRanges(p protocol.PacketNumber) bool /* is a new packet (and not a duplicate / delayed packet) */ { + if h.ranges.Len() == 0 { + h.ranges.PushBack(interval{Start: p, End: p}) + return true + } + + for el := h.ranges.Back(); el != nil; el = el.Prev() { + // p already included in an existing range. Nothing to do here + if p >= el.Value.Start && p <= el.Value.End { + return false + } + + if el.Value.End == p-1 { // extend a range at the end + el.Value.End = p + return true + } + if el.Value.Start == p+1 { // extend a range at the beginning + el.Value.Start = p + + prev := el.Prev() + if prev != nil && prev.Value.End+1 == el.Value.Start { // merge two ranges + prev.Value.End = el.Value.End + h.ranges.Remove(el) + } + return true + } + + // create a new range at the end + if p > el.Value.End { + h.ranges.InsertAfter(interval{Start: p, End: p}, el) + return true + } + } + + // create a new range at the beginning + h.ranges.InsertBefore(interval{Start: p, End: p}, h.ranges.Front()) + return true +} + +// Delete old ranges, if we're tracking more than 500 of them. +// This is a DoS defense against a peer that sends us too many gaps. +func (h *receivedPacketHistory) maybeDeleteOldRanges() { + for h.ranges.Len() > protocol.MaxNumAckRanges { + h.ranges.Remove(h.ranges.Front()) + } +} + +// DeleteBelow deletes all entries below (but not including) p +func (h *receivedPacketHistory) DeleteBelow(p protocol.PacketNumber) { + if p < h.deletedBelow { + return + } + h.deletedBelow = p + + nextEl := h.ranges.Front() + for el := h.ranges.Front(); nextEl != nil; el = nextEl { + nextEl = el.Next() + + if el.Value.End < p { // delete a whole range + h.ranges.Remove(el) + } else if p > el.Value.Start && p <= el.Value.End { + el.Value.Start = p + return + } else { // no ranges affected. Nothing to do + return + } + } +} + +// AppendAckRanges appends to a slice of all AckRanges that can be used in an AckFrame +func (h *receivedPacketHistory) AppendAckRanges(ackRanges []wire.AckRange) []wire.AckRange { + if h.ranges.Len() > 0 { + for el := h.ranges.Back(); el != nil; el = el.Prev() { + ackRanges = append(ackRanges, wire.AckRange{Smallest: el.Value.Start, Largest: el.Value.End}) + } + } + return ackRanges +} + +func (h *receivedPacketHistory) GetHighestAckRange() wire.AckRange { + ackRange := wire.AckRange{} + if h.ranges.Len() > 0 { + r := h.ranges.Back().Value + ackRange.Smallest = r.Start + ackRange.Largest = r.End + } + return ackRange +} + +func (h *receivedPacketHistory) IsPotentiallyDuplicate(p protocol.PacketNumber) bool { + if p < h.deletedBelow { + return true + } + for el := h.ranges.Back(); el != nil; el = el.Prev() { + if p > el.Value.End { + return false + } + if p <= el.Value.End && p >= el.Value.Start { + return true + } + } + return false +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/received_packet_tracker.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/received_packet_tracker.go new file mode 100644 index 0000000..0f365c3 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/received_packet_tracker.go @@ -0,0 +1,220 @@ +package ackhandler + +import ( + "fmt" + "time" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/internal/wire" +) + +// The receivedPacketTracker tracks packets for the Initial and Handshake packet number space. +// Every received packet is acknowledged immediately. +type receivedPacketTracker struct { + ect0, ect1, ecnce uint64 + + packetHistory receivedPacketHistory + + lastAck *wire.AckFrame + hasNewAck bool // true as soon as we received an ack-eliciting new packet +} + +func newReceivedPacketTracker() *receivedPacketTracker { + return &receivedPacketTracker{packetHistory: *newReceivedPacketHistory()} +} + +func (h *receivedPacketTracker) ReceivedPacket(pn protocol.PacketNumber, ecn protocol.ECN, rcvTime time.Time, ackEliciting bool) error { + if isNew := h.packetHistory.ReceivedPacket(pn); !isNew { + return fmt.Errorf("recevedPacketTracker BUG: ReceivedPacket called for old / duplicate packet %d", pn) + } + + //nolint:exhaustive // Only need to count ECT(0), ECT(1) and ECN-CE. + switch ecn { + case protocol.ECT0: + h.ect0++ + case protocol.ECT1: + h.ect1++ + case protocol.ECNCE: + h.ecnce++ + } + if !ackEliciting { + return nil + } + h.hasNewAck = true + return nil +} + +func (h *receivedPacketTracker) GetAckFrame() *wire.AckFrame { + if !h.hasNewAck { + return nil + } + + // This function always returns the same ACK frame struct, filled with the most recent values. + ack := h.lastAck + if ack == nil { + ack = &wire.AckFrame{} + } + ack.Reset() + ack.ECT0 = h.ect0 + ack.ECT1 = h.ect1 + ack.ECNCE = h.ecnce + ack.AckRanges = h.packetHistory.AppendAckRanges(ack.AckRanges) + + h.lastAck = ack + h.hasNewAck = false + return ack +} + +func (h *receivedPacketTracker) IsPotentiallyDuplicate(pn protocol.PacketNumber) bool { + return h.packetHistory.IsPotentiallyDuplicate(pn) +} + +// number of ack-eliciting packets received before sending an ACK +const packetsBeforeAck = 2 + +// The appDataReceivedPacketTracker tracks packets received in the Application Data packet number space. +// It waits until at least 2 packets were received before queueing an ACK, or until the max_ack_delay was reached. +type appDataReceivedPacketTracker struct { + receivedPacketTracker + + largestObservedRcvdTime time.Time + + largestObserved protocol.PacketNumber + ignoreBelow protocol.PacketNumber + + maxAckDelay time.Duration + ackQueued bool // true if we need send a new ACK + + ackElicitingPacketsReceivedSinceLastAck int + ackAlarm time.Time + + logger utils.Logger +} + +func newAppDataReceivedPacketTracker(logger utils.Logger) *appDataReceivedPacketTracker { + h := &appDataReceivedPacketTracker{ + receivedPacketTracker: *newReceivedPacketTracker(), + maxAckDelay: protocol.MaxAckDelay, + logger: logger, + } + return h +} + +func (h *appDataReceivedPacketTracker) ReceivedPacket(pn protocol.PacketNumber, ecn protocol.ECN, rcvTime time.Time, ackEliciting bool) error { + if err := h.receivedPacketTracker.ReceivedPacket(pn, ecn, rcvTime, ackEliciting); err != nil { + return err + } + if pn >= h.largestObserved { + h.largestObserved = pn + h.largestObservedRcvdTime = rcvTime + } + if !ackEliciting { + return nil + } + h.ackElicitingPacketsReceivedSinceLastAck++ + isMissing := h.isMissing(pn) + if !h.ackQueued && h.shouldQueueACK(pn, ecn, isMissing) { + h.ackQueued = true + h.ackAlarm = time.Time{} // cancel the ack alarm + } + if !h.ackQueued { + // No ACK queued, but we'll need to acknowledge the packet after max_ack_delay. + h.ackAlarm = rcvTime.Add(h.maxAckDelay) + if h.logger.Debug() { + h.logger.Debugf("\tSetting ACK timer to max ack delay: %s", h.maxAckDelay) + } + } + return nil +} + +// IgnoreBelow sets a lower limit for acknowledging packets. +// Packets with packet numbers smaller than p will not be acked. +func (h *appDataReceivedPacketTracker) IgnoreBelow(pn protocol.PacketNumber) { + if pn <= h.ignoreBelow { + return + } + h.ignoreBelow = pn + h.packetHistory.DeleteBelow(pn) + if h.logger.Debug() { + h.logger.Debugf("\tIgnoring all packets below %d.", pn) + } +} + +// isMissing says if a packet was reported missing in the last ACK. +func (h *appDataReceivedPacketTracker) isMissing(p protocol.PacketNumber) bool { + if h.lastAck == nil || p < h.ignoreBelow { + return false + } + return p < h.lastAck.LargestAcked() && !h.lastAck.AcksPacket(p) +} + +func (h *appDataReceivedPacketTracker) hasNewMissingPackets() bool { + if h.lastAck == nil { + return false + } + highestRange := h.packetHistory.GetHighestAckRange() + return highestRange.Smallest > h.lastAck.LargestAcked()+1 && highestRange.Len() == 1 +} + +func (h *appDataReceivedPacketTracker) shouldQueueACK(pn protocol.PacketNumber, ecn protocol.ECN, wasMissing bool) bool { + // always acknowledge the first packet + if h.lastAck == nil { + h.logger.Debugf("\tQueueing ACK because the first packet should be acknowledged.") + return true + } + + // Send an ACK if this packet was reported missing in an ACK sent before. + // Ack decimation with reordering relies on the timer to send an ACK, but if + // missing packets we reported in the previous ACK, send an ACK immediately. + if wasMissing { + if h.logger.Debug() { + h.logger.Debugf("\tQueueing ACK because packet %d was missing before.", pn) + } + return true + } + + // send an ACK every 2 ack-eliciting packets + if h.ackElicitingPacketsReceivedSinceLastAck >= packetsBeforeAck { + if h.logger.Debug() { + h.logger.Debugf("\tQueueing ACK because packet %d packets were received after the last ACK (using initial threshold: %d).", h.ackElicitingPacketsReceivedSinceLastAck, packetsBeforeAck) + } + return true + } + + // queue an ACK if there are new missing packets to report + if h.hasNewMissingPackets() { + h.logger.Debugf("\tQueuing ACK because there's a new missing packet to report.") + return true + } + + // queue an ACK if the packet was ECN-CE marked + if ecn == protocol.ECNCE { + h.logger.Debugf("\tQueuing ACK because the packet was ECN-CE marked.") + return true + } + return false +} + +func (h *appDataReceivedPacketTracker) GetAckFrame(onlyIfQueued bool) *wire.AckFrame { + now := time.Now() + if onlyIfQueued && !h.ackQueued { + if h.ackAlarm.IsZero() || h.ackAlarm.After(now) { + return nil + } + if h.logger.Debug() && !h.ackAlarm.IsZero() { + h.logger.Debugf("Sending ACK because the ACK timer expired.") + } + } + ack := h.receivedPacketTracker.GetAckFrame() + if ack == nil { + return nil + } + ack.DelayTime = max(0, now.Sub(h.largestObservedRcvdTime)) + h.ackQueued = false + h.ackAlarm = time.Time{} + h.ackElicitingPacketsReceivedSinceLastAck = 0 + return ack +} + +func (h *appDataReceivedPacketTracker) GetAlarmTimeout() time.Time { return h.ackAlarm } diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/send_mode.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/send_mode.go new file mode 100644 index 0000000..c03f3a6 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/send_mode.go @@ -0,0 +1,46 @@ +package ackhandler + +import "fmt" + +// The SendMode says what kind of packets can be sent. +type SendMode uint8 + +const ( + // SendNone means that no packets should be sent + SendNone SendMode = iota + // SendAck means an ACK-only packet should be sent + SendAck + // SendPTOInitial means that an Initial probe packet should be sent + SendPTOInitial + // SendPTOHandshake means that a Handshake probe packet should be sent + SendPTOHandshake + // SendPTOAppData means that an Application data probe packet should be sent + SendPTOAppData + // SendPacingLimited means that the pacer doesn't allow sending of a packet right now, + // but will do in a little while. + // The timestamp when sending is allowed again can be obtained via the SentPacketHandler.TimeUntilSend. + SendPacingLimited + // SendAny means that any packet should be sent + SendAny +) + +func (s SendMode) String() string { + switch s { + case SendNone: + return "none" + case SendAck: + return "ack" + case SendPTOInitial: + return "pto (Initial)" + case SendPTOHandshake: + return "pto (Handshake)" + case SendPTOAppData: + return "pto (Application Data)" + case SendAny: + return "any" + case SendPacingLimited: + return "pacing limited" + default: + return fmt.Sprintf("invalid send mode: %d", s) + } +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/sent_packet_handler.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/sent_packet_handler.go new file mode 100644 index 0000000..ab3d548 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/sent_packet_handler.go @@ -0,0 +1,929 @@ +package ackhandler + +import ( + "errors" + "fmt" + "time" + + "github.com/enetx/uquic/internal/congestion" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/internal/wire" + "github.com/enetx/uquic/logging" +) + +const ( + // Maximum reordering in time space before time based loss detection considers a packet lost. + // Specified as an RTT multiplier. + timeThreshold = 9.0 / 8 + // Maximum reordering in packets before packet threshold loss detection considers a packet lost. + packetThreshold = 3 + // Before validating the client's address, the server won't send more than 3x bytes than it received. + amplificationFactor = 3 + // We use Retry packets to derive an RTT estimate. Make sure we don't set the RTT to a super low value yet. + minRTTAfterRetry = 5 * time.Millisecond + // The PTO duration uses exponential backoff, but is truncated to a maximum value, as allowed by RFC 8961, section 4.4. + maxPTODuration = 60 * time.Second +) + +type packetNumberSpace struct { + history *sentPacketHistory + pns packetNumberGenerator + + lossTime time.Time + lastAckElicitingPacketTime time.Time + + largestAcked protocol.PacketNumber + largestSent protocol.PacketNumber +} + +func newPacketNumberSpace(initialPN protocol.PacketNumber, skipPNs bool) *packetNumberSpace { + var pns packetNumberGenerator + if skipPNs { + pns = newSkippingPacketNumberGenerator(initialPN, protocol.SkipPacketInitialPeriod, protocol.SkipPacketMaxPeriod) + } else { + pns = newSequentialPacketNumberGenerator(initialPN) + } + return &packetNumberSpace{ + history: newSentPacketHistory(), + pns: pns, + largestSent: protocol.InvalidPacketNumber, + largestAcked: protocol.InvalidPacketNumber, + } +} + +type sentPacketHandler struct { + initialPackets *packetNumberSpace + handshakePackets *packetNumberSpace + appDataPackets *packetNumberSpace + + // Do we know that the peer completed address validation yet? + // Always true for the server. + peerCompletedAddressValidation bool + bytesReceived protocol.ByteCount + bytesSent protocol.ByteCount + // Have we validated the peer's address yet? + // Always true for the client. + peerAddressValidated bool + + handshakeConfirmed bool + + // lowestNotConfirmedAcked is the lowest packet number that we sent an ACK for, but haven't received confirmation, that this ACK actually arrived + // example: we send an ACK for packets 90-100 with packet number 20 + // once we receive an ACK from the peer for packet 20, the lowestNotConfirmedAcked is 101 + // Only applies to the application-data packet number space. + lowestNotConfirmedAcked protocol.PacketNumber + + ackedPackets []*packet // to avoid allocations in detectAndRemoveAckedPackets + + bytesInFlight protocol.ByteCount + + congestion congestion.SendAlgorithmWithDebugInfos + rttStats *utils.RTTStats + + // The number of times a PTO has been sent without receiving an ack. + ptoCount uint32 + ptoMode SendMode + // The number of PTO probe packets that should be sent. + // Only applies to the application-data packet number space. + numProbesToSend int + + // The alarm timeout + alarm time.Time + + enableECN bool + ecnTracker ecnHandler + + perspective protocol.Perspective + + tracer *logging.ConnectionTracer + logger utils.Logger +} + +var ( + _ SentPacketHandler = &sentPacketHandler{} + _ sentPacketTracker = &sentPacketHandler{} +) + +// clientAddressValidated indicates whether the address was validated beforehand by an address validation token. +// If the address was validated, the amplification limit doesn't apply. It has no effect for a client. +func newSentPacketHandler( + initialPN protocol.PacketNumber, + initialMaxDatagramSize protocol.ByteCount, + rttStats *utils.RTTStats, + clientAddressValidated bool, + enableECN bool, + pers protocol.Perspective, + tracer *logging.ConnectionTracer, + logger utils.Logger, +) *sentPacketHandler { + congestion := congestion.NewCubicSender( + congestion.DefaultClock{}, + rttStats, + initialMaxDatagramSize, + true, // use Reno + tracer, + ) + + h := &sentPacketHandler{ + peerCompletedAddressValidation: pers == protocol.PerspectiveServer, + peerAddressValidated: pers == protocol.PerspectiveClient || clientAddressValidated, + initialPackets: newPacketNumberSpace(initialPN, false), + handshakePackets: newPacketNumberSpace(0, false), + appDataPackets: newPacketNumberSpace(0, true), + rttStats: rttStats, + congestion: congestion, + perspective: pers, + tracer: tracer, + logger: logger, + } + if enableECN { + h.enableECN = true + h.ecnTracker = newECNTracker(logger, tracer) + } + return h +} + +func (h *sentPacketHandler) removeFromBytesInFlight(p *packet) { + if p.includedInBytesInFlight { + if p.Length > h.bytesInFlight { + panic("negative bytes_in_flight") + } + h.bytesInFlight -= p.Length + p.includedInBytesInFlight = false + } +} + +func (h *sentPacketHandler) DropPackets(encLevel protocol.EncryptionLevel) { + // The server won't await address validation after the handshake is confirmed. + // This applies even if we didn't receive an ACK for a Handshake packet. + if h.perspective == protocol.PerspectiveClient && encLevel == protocol.EncryptionHandshake { + h.peerCompletedAddressValidation = true + } + // remove outstanding packets from bytes_in_flight + if encLevel == protocol.EncryptionInitial || encLevel == protocol.EncryptionHandshake { + pnSpace := h.getPacketNumberSpace(encLevel) + // We might already have dropped this packet number space. + if pnSpace == nil { + return + } + pnSpace.history.Iterate(func(p *packet) (bool, error) { + h.removeFromBytesInFlight(p) + return true, nil + }) + } + // drop the packet history + //nolint:exhaustive // Not every packet number space can be dropped. + switch encLevel { + case protocol.EncryptionInitial: + h.initialPackets = nil + case protocol.EncryptionHandshake: + h.handshakePackets = nil + case protocol.Encryption0RTT: + // This function is only called when 0-RTT is rejected, + // and not when the client drops 0-RTT keys when the handshake completes. + // When 0-RTT is rejected, all application data sent so far becomes invalid. + // Delete the packets from the history and remove them from bytes_in_flight. + h.appDataPackets.history.Iterate(func(p *packet) (bool, error) { + if p.EncryptionLevel != protocol.Encryption0RTT && !p.skippedPacket { + return false, nil + } + h.removeFromBytesInFlight(p) + h.appDataPackets.history.Remove(p.PacketNumber) + return true, nil + }) + default: + panic(fmt.Sprintf("Cannot drop keys for encryption level %s", encLevel)) + } + if h.tracer != nil && h.tracer.UpdatedPTOCount != nil && h.ptoCount != 0 { + h.tracer.UpdatedPTOCount(0) + } + h.ptoCount = 0 + h.numProbesToSend = 0 + h.ptoMode = SendNone + h.setLossDetectionTimer() +} + +func (h *sentPacketHandler) ReceivedBytes(n protocol.ByteCount) { + wasAmplificationLimit := h.isAmplificationLimited() + h.bytesReceived += n + if wasAmplificationLimit && !h.isAmplificationLimited() { + h.setLossDetectionTimer() + } +} + +func (h *sentPacketHandler) ReceivedPacket(l protocol.EncryptionLevel) { + if h.perspective == protocol.PerspectiveServer && l == protocol.EncryptionHandshake && !h.peerAddressValidated { + h.peerAddressValidated = true + h.setLossDetectionTimer() + } +} + +func (h *sentPacketHandler) packetsInFlight() int { + packetsInFlight := h.appDataPackets.history.Len() + if h.handshakePackets != nil { + packetsInFlight += h.handshakePackets.history.Len() + } + if h.initialPackets != nil { + packetsInFlight += h.initialPackets.history.Len() + } + return packetsInFlight +} + +func (h *sentPacketHandler) SentPacket( + t time.Time, + pn, largestAcked protocol.PacketNumber, + streamFrames []StreamFrame, + frames []Frame, + encLevel protocol.EncryptionLevel, + ecn protocol.ECN, + size protocol.ByteCount, + isPathMTUProbePacket bool, +) { + h.bytesSent += size + + pnSpace := h.getPacketNumberSpace(encLevel) + if h.logger.Debug() && pnSpace.history.HasOutstandingPackets() { + for p := max(0, pnSpace.largestSent+1); p < pn; p++ { + h.logger.Debugf("Skipping packet number %d", p) + } + } + + pnSpace.largestSent = pn + isAckEliciting := len(streamFrames) > 0 || len(frames) > 0 + + if isAckEliciting { + pnSpace.lastAckElicitingPacketTime = t + h.bytesInFlight += size + if h.numProbesToSend > 0 { + h.numProbesToSend-- + } + } + h.congestion.OnPacketSent(t, h.bytesInFlight, pn, size, isAckEliciting) + + if encLevel == protocol.Encryption1RTT && h.ecnTracker != nil { + h.ecnTracker.SentPacket(pn, ecn) + } + + if !isAckEliciting { + pnSpace.history.SentNonAckElicitingPacket(pn) + if !h.peerCompletedAddressValidation { + h.setLossDetectionTimer() + } + return + } + + p := getPacket() + p.SendTime = t + p.PacketNumber = pn + p.EncryptionLevel = encLevel + p.Length = size + p.LargestAcked = largestAcked + p.StreamFrames = streamFrames + p.Frames = frames + p.IsPathMTUProbePacket = isPathMTUProbePacket + p.includedInBytesInFlight = true + + pnSpace.history.SentAckElicitingPacket(p) + if h.tracer != nil && h.tracer.UpdatedMetrics != nil { + h.tracer.UpdatedMetrics(h.rttStats, h.congestion.GetCongestionWindow(), h.bytesInFlight, h.packetsInFlight()) + } + h.setLossDetectionTimer() +} + +func (h *sentPacketHandler) getPacketNumberSpace(encLevel protocol.EncryptionLevel) *packetNumberSpace { + switch encLevel { + case protocol.EncryptionInitial: + return h.initialPackets + case protocol.EncryptionHandshake: + return h.handshakePackets + case protocol.Encryption0RTT, protocol.Encryption1RTT: + return h.appDataPackets + default: + panic("invalid packet number space") + } +} + +func (h *sentPacketHandler) ReceivedAck(ack *wire.AckFrame, encLevel protocol.EncryptionLevel, rcvTime time.Time) (bool /* contained 1-RTT packet */, error) { + pnSpace := h.getPacketNumberSpace(encLevel) + + largestAcked := ack.LargestAcked() + if largestAcked > pnSpace.largestSent { + return false, &qerr.TransportError{ + ErrorCode: qerr.ProtocolViolation, + ErrorMessage: "received ACK for an unsent packet", + } + } + + // Servers complete address validation when a protected packet is received. + if h.perspective == protocol.PerspectiveClient && !h.peerCompletedAddressValidation && + (encLevel == protocol.EncryptionHandshake || encLevel == protocol.Encryption1RTT) { + h.peerCompletedAddressValidation = true + h.logger.Debugf("Peer doesn't await address validation any longer.") + // Make sure that the timer is reset, even if this ACK doesn't acknowledge any (ack-eliciting) packets. + h.setLossDetectionTimer() + } + + priorInFlight := h.bytesInFlight + ackedPackets, err := h.detectAndRemoveAckedPackets(ack, encLevel) + if err != nil || len(ackedPackets) == 0 { + return false, err + } + // update the RTT, if the largest acked is newly acknowledged + if len(ackedPackets) > 0 { + if p := ackedPackets[len(ackedPackets)-1]; p.PacketNumber == ack.LargestAcked() { + // don't use the ack delay for Initial and Handshake packets + var ackDelay time.Duration + if encLevel == protocol.Encryption1RTT { + ackDelay = min(ack.DelayTime, h.rttStats.MaxAckDelay()) + } + h.rttStats.UpdateRTT(rcvTime.Sub(p.SendTime), ackDelay, rcvTime) + if h.logger.Debug() { + h.logger.Debugf("\tupdated RTT: %s (σ: %s)", h.rttStats.SmoothedRTT(), h.rttStats.MeanDeviation()) + } + h.congestion.MaybeExitSlowStart() + } + } + + // Only inform the ECN tracker about new 1-RTT ACKs if the ACK increases the largest acked. + if encLevel == protocol.Encryption1RTT && h.ecnTracker != nil && largestAcked > pnSpace.largestAcked { + congested := h.ecnTracker.HandleNewlyAcked(ackedPackets, int64(ack.ECT0), int64(ack.ECT1), int64(ack.ECNCE)) + if congested { + h.congestion.OnCongestionEvent(largestAcked, 0, priorInFlight) + } + } + + pnSpace.largestAcked = max(pnSpace.largestAcked, largestAcked) + + if err := h.detectLostPackets(rcvTime, encLevel); err != nil { + return false, err + } + var acked1RTTPacket bool + for _, p := range ackedPackets { + if p.includedInBytesInFlight && !p.declaredLost { + h.congestion.OnPacketAcked(p.PacketNumber, p.Length, priorInFlight, rcvTime) + } + if p.EncryptionLevel == protocol.Encryption1RTT { + acked1RTTPacket = true + } + h.removeFromBytesInFlight(p) + putPacket(p) + } + // After this point, we must not use ackedPackets any longer! + // We've already returned the buffers. + ackedPackets = nil //nolint:ineffassign // This is just to be on the safe side. + + // Reset the pto_count unless the client is unsure if the server has validated the client's address. + if h.peerCompletedAddressValidation { + if h.tracer != nil && h.tracer.UpdatedPTOCount != nil && h.ptoCount != 0 { + h.tracer.UpdatedPTOCount(0) + } + h.ptoCount = 0 + } + h.numProbesToSend = 0 + + if h.tracer != nil && h.tracer.UpdatedMetrics != nil { + h.tracer.UpdatedMetrics(h.rttStats, h.congestion.GetCongestionWindow(), h.bytesInFlight, h.packetsInFlight()) + } + + h.setLossDetectionTimer() + return acked1RTTPacket, nil +} + +func (h *sentPacketHandler) GetLowestPacketNotConfirmedAcked() protocol.PacketNumber { + return h.lowestNotConfirmedAcked +} + +// Packets are returned in ascending packet number order. +func (h *sentPacketHandler) detectAndRemoveAckedPackets(ack *wire.AckFrame, encLevel protocol.EncryptionLevel) ([]*packet, error) { + pnSpace := h.getPacketNumberSpace(encLevel) + h.ackedPackets = h.ackedPackets[:0] + ackRangeIndex := 0 + lowestAcked := ack.LowestAcked() + largestAcked := ack.LargestAcked() + err := pnSpace.history.Iterate(func(p *packet) (bool, error) { + // Ignore packets below the lowest acked + if p.PacketNumber < lowestAcked { + return true, nil + } + // Break after largest acked is reached + if p.PacketNumber > largestAcked { + return false, nil + } + + if ack.HasMissingRanges() { + ackRange := ack.AckRanges[len(ack.AckRanges)-1-ackRangeIndex] + + for p.PacketNumber > ackRange.Largest && ackRangeIndex < len(ack.AckRanges)-1 { + ackRangeIndex++ + ackRange = ack.AckRanges[len(ack.AckRanges)-1-ackRangeIndex] + } + + if p.PacketNumber < ackRange.Smallest { // packet not contained in ACK range + return true, nil + } + if p.PacketNumber > ackRange.Largest { + return false, fmt.Errorf("BUG: ackhandler would have acked wrong packet %d, while evaluating range %d -> %d", p.PacketNumber, ackRange.Smallest, ackRange.Largest) + } + } + if p.skippedPacket { + return false, &qerr.TransportError{ + ErrorCode: qerr.ProtocolViolation, + ErrorMessage: fmt.Sprintf("received an ACK for skipped packet number: %d (%s)", p.PacketNumber, encLevel), + } + } + h.ackedPackets = append(h.ackedPackets, p) + return true, nil + }) + if h.logger.Debug() && len(h.ackedPackets) > 0 { + pns := make([]protocol.PacketNumber, len(h.ackedPackets)) + for i, p := range h.ackedPackets { + pns[i] = p.PacketNumber + } + h.logger.Debugf("\tnewly acked packets (%d): %d", len(pns), pns) + } + + for _, p := range h.ackedPackets { + if p.LargestAcked != protocol.InvalidPacketNumber && encLevel == protocol.Encryption1RTT { + h.lowestNotConfirmedAcked = max(h.lowestNotConfirmedAcked, p.LargestAcked+1) + } + + for _, f := range p.Frames { + if f.Handler != nil { + f.Handler.OnAcked(f.Frame) + } + } + for _, f := range p.StreamFrames { + if f.Handler != nil { + f.Handler.OnAcked(f.Frame) + } + } + if err := pnSpace.history.Remove(p.PacketNumber); err != nil { + return nil, err + } + if h.tracer != nil && h.tracer.AcknowledgedPacket != nil { + h.tracer.AcknowledgedPacket(encLevel, p.PacketNumber) + } + } + + return h.ackedPackets, err +} + +func (h *sentPacketHandler) getLossTimeAndSpace() (time.Time, protocol.EncryptionLevel) { + var encLevel protocol.EncryptionLevel + var lossTime time.Time + + if h.initialPackets != nil { + lossTime = h.initialPackets.lossTime + encLevel = protocol.EncryptionInitial + } + if h.handshakePackets != nil && (lossTime.IsZero() || (!h.handshakePackets.lossTime.IsZero() && h.handshakePackets.lossTime.Before(lossTime))) { + lossTime = h.handshakePackets.lossTime + encLevel = protocol.EncryptionHandshake + } + if lossTime.IsZero() || (!h.appDataPackets.lossTime.IsZero() && h.appDataPackets.lossTime.Before(lossTime)) { + lossTime = h.appDataPackets.lossTime + encLevel = protocol.Encryption1RTT + } + return lossTime, encLevel +} + +func (h *sentPacketHandler) getScaledPTO(includeMaxAckDelay bool) time.Duration { + pto := h.rttStats.PTO(includeMaxAckDelay) << h.ptoCount + if pto > maxPTODuration || pto <= 0 { + return maxPTODuration + } + return pto +} + +// same logic as getLossTimeAndSpace, but for lastAckElicitingPacketTime instead of lossTime +func (h *sentPacketHandler) getPTOTimeAndSpace() (pto time.Time, encLevel protocol.EncryptionLevel, ok bool) { + // We only send application data probe packets once the handshake is confirmed, + // because before that, we don't have the keys to decrypt ACKs sent in 1-RTT packets. + if !h.handshakeConfirmed && !h.hasOutstandingCryptoPackets() { + if h.peerCompletedAddressValidation { + return + } + t := time.Now().Add(h.getScaledPTO(false)) + if h.initialPackets != nil { + return t, protocol.EncryptionInitial, true + } + return t, protocol.EncryptionHandshake, true + } + + if h.initialPackets != nil { + encLevel = protocol.EncryptionInitial + if t := h.initialPackets.lastAckElicitingPacketTime; !t.IsZero() { + pto = t.Add(h.getScaledPTO(false)) + } + } + if h.handshakePackets != nil && !h.handshakePackets.lastAckElicitingPacketTime.IsZero() { + t := h.handshakePackets.lastAckElicitingPacketTime.Add(h.getScaledPTO(false)) + if pto.IsZero() || (!t.IsZero() && t.Before(pto)) { + pto = t + encLevel = protocol.EncryptionHandshake + } + } + if h.handshakeConfirmed && !h.appDataPackets.lastAckElicitingPacketTime.IsZero() { + t := h.appDataPackets.lastAckElicitingPacketTime.Add(h.getScaledPTO(true)) + if pto.IsZero() || (!t.IsZero() && t.Before(pto)) { + pto = t + encLevel = protocol.Encryption1RTT + } + } + return pto, encLevel, true +} + +func (h *sentPacketHandler) hasOutstandingCryptoPackets() bool { + if h.initialPackets != nil && h.initialPackets.history.HasOutstandingPackets() { + return true + } + if h.handshakePackets != nil && h.handshakePackets.history.HasOutstandingPackets() { + return true + } + return false +} + +func (h *sentPacketHandler) hasOutstandingPackets() bool { + return h.appDataPackets.history.HasOutstandingPackets() || h.hasOutstandingCryptoPackets() +} + +func (h *sentPacketHandler) setLossDetectionTimer() { + oldAlarm := h.alarm // only needed in case tracing is enabled + lossTime, encLevel := h.getLossTimeAndSpace() + if !lossTime.IsZero() { + // Early retransmit timer or time loss detection. + h.alarm = lossTime + if h.tracer != nil && h.tracer.SetLossTimer != nil && h.alarm != oldAlarm { + h.tracer.SetLossTimer(logging.TimerTypeACK, encLevel, h.alarm) + } + return + } + + // Cancel the alarm if amplification limited. + if h.isAmplificationLimited() { + h.alarm = time.Time{} + if !oldAlarm.IsZero() { + h.logger.Debugf("Canceling loss detection timer. Amplification limited.") + if h.tracer != nil && h.tracer.LossTimerCanceled != nil { + h.tracer.LossTimerCanceled() + } + } + return + } + + // Cancel the alarm if no packets are outstanding + if !h.hasOutstandingPackets() && h.peerCompletedAddressValidation { + h.alarm = time.Time{} + if !oldAlarm.IsZero() { + h.logger.Debugf("Canceling loss detection timer. No packets in flight.") + if h.tracer != nil && h.tracer.LossTimerCanceled != nil { + h.tracer.LossTimerCanceled() + } + } + return + } + + // PTO alarm + ptoTime, encLevel, ok := h.getPTOTimeAndSpace() + if !ok { + if !oldAlarm.IsZero() { + h.alarm = time.Time{} + h.logger.Debugf("Canceling loss detection timer. No PTO needed..") + if h.tracer != nil && h.tracer.LossTimerCanceled != nil { + h.tracer.LossTimerCanceled() + } + } + return + } + h.alarm = ptoTime + if h.tracer != nil && h.tracer.SetLossTimer != nil && h.alarm != oldAlarm { + h.tracer.SetLossTimer(logging.TimerTypePTO, encLevel, h.alarm) + } +} + +func (h *sentPacketHandler) detectLostPackets(now time.Time, encLevel protocol.EncryptionLevel) error { + pnSpace := h.getPacketNumberSpace(encLevel) + pnSpace.lossTime = time.Time{} + + maxRTT := float64(max(h.rttStats.LatestRTT(), h.rttStats.SmoothedRTT())) + lossDelay := time.Duration(timeThreshold * maxRTT) + + // Minimum time of granularity before packets are deemed lost. + lossDelay = max(lossDelay, protocol.TimerGranularity) + + // Packets sent before this time are deemed lost. + lostSendTime := now.Add(-lossDelay) + + priorInFlight := h.bytesInFlight + return pnSpace.history.Iterate(func(p *packet) (bool, error) { + if p.PacketNumber > pnSpace.largestAcked { + return false, nil + } + + var packetLost bool + if p.SendTime.Before(lostSendTime) { + packetLost = true + if !p.skippedPacket { + if h.logger.Debug() { + h.logger.Debugf("\tlost packet %d (time threshold)", p.PacketNumber) + } + if h.tracer != nil && h.tracer.LostPacket != nil { + h.tracer.LostPacket(p.EncryptionLevel, p.PacketNumber, logging.PacketLossTimeThreshold) + } + } + } else if pnSpace.largestAcked >= p.PacketNumber+packetThreshold { + packetLost = true + if !p.skippedPacket { + if h.logger.Debug() { + h.logger.Debugf("\tlost packet %d (reordering threshold)", p.PacketNumber) + } + if h.tracer != nil && h.tracer.LostPacket != nil { + h.tracer.LostPacket(p.EncryptionLevel, p.PacketNumber, logging.PacketLossReorderingThreshold) + } + } + } else if pnSpace.lossTime.IsZero() { + // Note: This conditional is only entered once per call + lossTime := p.SendTime.Add(lossDelay) + if h.logger.Debug() { + h.logger.Debugf("\tsetting loss timer for packet %d (%s) to %s (in %s)", p.PacketNumber, encLevel, lossDelay, lossTime) + } + pnSpace.lossTime = lossTime + } + if packetLost { + pnSpace.history.DeclareLost(p.PacketNumber) + if !p.skippedPacket { + // the bytes in flight need to be reduced no matter if the frames in this packet will be retransmitted + h.removeFromBytesInFlight(p) + h.queueFramesForRetransmission(p) + if !p.IsPathMTUProbePacket { + h.congestion.OnCongestionEvent(p.PacketNumber, p.Length, priorInFlight) + } + if encLevel == protocol.Encryption1RTT && h.ecnTracker != nil { + h.ecnTracker.LostPacket(p.PacketNumber) + } + } + } + return true, nil + }) +} + +func (h *sentPacketHandler) OnLossDetectionTimeout() error { + defer h.setLossDetectionTimer() + earliestLossTime, encLevel := h.getLossTimeAndSpace() + if !earliestLossTime.IsZero() { + if h.logger.Debug() { + h.logger.Debugf("Loss detection alarm fired in loss timer mode. Loss time: %s", earliestLossTime) + } + if h.tracer != nil && h.tracer.LossTimerExpired != nil { + h.tracer.LossTimerExpired(logging.TimerTypeACK, encLevel) + } + // Early retransmit or time loss detection + return h.detectLostPackets(time.Now(), encLevel) + } + + // PTO + // When all outstanding are acknowledged, the alarm is canceled in + // setLossDetectionTimer. This doesn't reset the timer in the session though. + // When OnAlarm is called, we therefore need to make sure that there are + // actually packets outstanding. + if h.bytesInFlight == 0 && !h.peerCompletedAddressValidation { + h.ptoCount++ + h.numProbesToSend++ + if h.initialPackets != nil { + h.ptoMode = SendPTOInitial + } else if h.handshakePackets != nil { + h.ptoMode = SendPTOHandshake + } else { + return errors.New("sentPacketHandler BUG: PTO fired, but bytes_in_flight is 0 and Initial and Handshake already dropped") + } + return nil + } + + _, encLevel, ok := h.getPTOTimeAndSpace() + if !ok { + return nil + } + if ps := h.getPacketNumberSpace(encLevel); !ps.history.HasOutstandingPackets() && !h.peerCompletedAddressValidation { + return nil + } + h.ptoCount++ + if h.logger.Debug() { + h.logger.Debugf("Loss detection alarm for %s fired in PTO mode. PTO count: %d", encLevel, h.ptoCount) + } + if h.tracer != nil { + if h.tracer.LossTimerExpired != nil { + h.tracer.LossTimerExpired(logging.TimerTypePTO, encLevel) + } + if h.tracer.UpdatedPTOCount != nil { + h.tracer.UpdatedPTOCount(h.ptoCount) + } + } + h.numProbesToSend += 2 + //nolint:exhaustive // We never arm a PTO timer for 0-RTT packets. + switch encLevel { + case protocol.EncryptionInitial: + h.ptoMode = SendPTOInitial + case protocol.EncryptionHandshake: + h.ptoMode = SendPTOHandshake + case protocol.Encryption1RTT: + // skip a packet number in order to elicit an immediate ACK + pn := h.PopPacketNumber(protocol.Encryption1RTT) + h.getPacketNumberSpace(protocol.Encryption1RTT).history.SkippedPacket(pn) + h.ptoMode = SendPTOAppData + default: + return fmt.Errorf("PTO timer in unexpected encryption level: %s", encLevel) + } + return nil +} + +func (h *sentPacketHandler) GetLossDetectionTimeout() time.Time { + return h.alarm +} + +func (h *sentPacketHandler) ECNMode(isShortHeaderPacket bool) protocol.ECN { + if !h.enableECN { + return protocol.ECNUnsupported + } + if !isShortHeaderPacket { + return protocol.ECNNon + } + return h.ecnTracker.Mode() +} + +func (h *sentPacketHandler) PeekPacketNumber(encLevel protocol.EncryptionLevel) (protocol.PacketNumber, protocol.PacketNumberLen) { + pnSpace := h.getPacketNumberSpace(encLevel) + pn := pnSpace.pns.Peek() + // See section 17.1 of RFC 9000. + + return pn, protocol.GetPacketNumberLengthForHeader(pn, pnSpace.largestAcked) +} + +func (h *sentPacketHandler) PopPacketNumber(encLevel protocol.EncryptionLevel) protocol.PacketNumber { + pnSpace := h.getPacketNumberSpace(encLevel) + skipped, pn := pnSpace.pns.Pop() + if skipped { + skippedPN := pn - 1 + pnSpace.history.SkippedPacket(skippedPN) + if h.logger.Debug() { + h.logger.Debugf("Skipping packet number %d", skippedPN) + } + } + return pn +} + +func (h *sentPacketHandler) SendMode(now time.Time) SendMode { + numTrackedPackets := h.appDataPackets.history.Len() + if h.initialPackets != nil { + numTrackedPackets += h.initialPackets.history.Len() + } + if h.handshakePackets != nil { + numTrackedPackets += h.handshakePackets.history.Len() + } + + if h.isAmplificationLimited() { + h.logger.Debugf("Amplification window limited. Received %d bytes, already sent out %d bytes", h.bytesReceived, h.bytesSent) + return SendNone + } + // Don't send any packets if we're keeping track of the maximum number of packets. + // Note that since MaxOutstandingSentPackets is smaller than MaxTrackedSentPackets, + // we will stop sending out new data when reaching MaxOutstandingSentPackets, + // but still allow sending of retransmissions and ACKs. + if numTrackedPackets >= protocol.MaxTrackedSentPackets { + if h.logger.Debug() { + h.logger.Debugf("Limited by the number of tracked packets: tracking %d packets, maximum %d", numTrackedPackets, protocol.MaxTrackedSentPackets) + } + return SendNone + } + if h.numProbesToSend > 0 { + return h.ptoMode + } + // Only send ACKs if we're congestion limited. + if !h.congestion.CanSend(h.bytesInFlight) { + if h.logger.Debug() { + h.logger.Debugf("Congestion limited: bytes in flight %d, window %d", h.bytesInFlight, h.congestion.GetCongestionWindow()) + } + return SendAck + } + if numTrackedPackets >= protocol.MaxOutstandingSentPackets { + if h.logger.Debug() { + h.logger.Debugf("Max outstanding limited: tracking %d packets, maximum: %d", numTrackedPackets, protocol.MaxOutstandingSentPackets) + } + return SendAck + } + if !h.congestion.HasPacingBudget(now) { + return SendPacingLimited + } + return SendAny +} + +func (h *sentPacketHandler) TimeUntilSend() time.Time { + return h.congestion.TimeUntilSend(h.bytesInFlight) +} + +func (h *sentPacketHandler) SetMaxDatagramSize(s protocol.ByteCount) { + h.congestion.SetMaxDatagramSize(s) +} + +func (h *sentPacketHandler) isAmplificationLimited() bool { + if h.peerAddressValidated { + return false + } + return h.bytesSent >= amplificationFactor*h.bytesReceived +} + +func (h *sentPacketHandler) QueueProbePacket(encLevel protocol.EncryptionLevel) bool { + pnSpace := h.getPacketNumberSpace(encLevel) + p := pnSpace.history.FirstOutstanding() + if p == nil { + return false + } + h.queueFramesForRetransmission(p) + // TODO: don't declare the packet lost here. + // Keep track of acknowledged frames instead. + h.removeFromBytesInFlight(p) + pnSpace.history.DeclareLost(p.PacketNumber) + return true +} + +func (h *sentPacketHandler) queueFramesForRetransmission(p *packet) { + if len(p.Frames) == 0 && len(p.StreamFrames) == 0 { + panic("no frames") + } + for _, f := range p.Frames { + if f.Handler != nil { + f.Handler.OnLost(f.Frame) + } + } + for _, f := range p.StreamFrames { + if f.Handler != nil { + f.Handler.OnLost(f.Frame) + } + } + p.StreamFrames = nil + p.Frames = nil +} + +func (h *sentPacketHandler) ResetForRetry(now time.Time) error { + h.bytesInFlight = 0 + var firstPacketSendTime time.Time + h.initialPackets.history.Iterate(func(p *packet) (bool, error) { + if firstPacketSendTime.IsZero() { + firstPacketSendTime = p.SendTime + } + if p.declaredLost || p.skippedPacket { + return true, nil + } + h.queueFramesForRetransmission(p) + return true, nil + }) + // All application data packets sent at this point are 0-RTT packets. + // In the case of a Retry, we can assume that the server dropped all of them. + h.appDataPackets.history.Iterate(func(p *packet) (bool, error) { + if !p.declaredLost && !p.skippedPacket { + h.queueFramesForRetransmission(p) + } + return true, nil + }) + + // Only use the Retry to estimate the RTT if we didn't send any retransmission for the Initial. + // Otherwise, we don't know which Initial the Retry was sent in response to. + if h.ptoCount == 0 { + // Don't set the RTT to a value lower than 5ms here. + h.rttStats.UpdateRTT(max(minRTTAfterRetry, now.Sub(firstPacketSendTime)), 0, now) + if h.logger.Debug() { + h.logger.Debugf("\tupdated RTT: %s (σ: %s)", h.rttStats.SmoothedRTT(), h.rttStats.MeanDeviation()) + } + if h.tracer != nil && h.tracer.UpdatedMetrics != nil { + h.tracer.UpdatedMetrics(h.rttStats, h.congestion.GetCongestionWindow(), h.bytesInFlight, h.packetsInFlight()) + } + } + h.initialPackets = newPacketNumberSpace(h.initialPackets.pns.Peek(), false) + h.appDataPackets = newPacketNumberSpace(h.appDataPackets.pns.Peek(), true) + oldAlarm := h.alarm + h.alarm = time.Time{} + if h.tracer != nil { + if h.tracer.UpdatedPTOCount != nil { + h.tracer.UpdatedPTOCount(0) + } + if !oldAlarm.IsZero() && h.tracer.LossTimerCanceled != nil { + h.tracer.LossTimerCanceled() + } + } + h.ptoCount = 0 + return nil +} + +func (h *sentPacketHandler) SetHandshakeConfirmed() { + if h.initialPackets != nil { + panic("didn't drop initial correctly") + } + if h.handshakePackets != nil { + panic("didn't drop handshake correctly") + } + h.handshakeConfirmed = true + // We don't send PTOs for application data packets before the handshake completes. + // Make sure the timer is armed now, if necessary. + h.setLossDetectionTimer() +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/sent_packet_history.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/sent_packet_history.go new file mode 100644 index 0000000..116082f --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/sent_packet_history.go @@ -0,0 +1,177 @@ +package ackhandler + +import ( + "fmt" + + "github.com/enetx/uquic/internal/protocol" +) + +type sentPacketHistory struct { + packets []*packet + + numOutstanding int + + highestPacketNumber protocol.PacketNumber +} + +func newSentPacketHistory() *sentPacketHistory { + return &sentPacketHistory{ + packets: make([]*packet, 0, 32), + highestPacketNumber: protocol.InvalidPacketNumber, + } +} + +func (h *sentPacketHistory) checkSequentialPacketNumberUse(pn protocol.PacketNumber) { + if h.highestPacketNumber != protocol.InvalidPacketNumber { + if pn != h.highestPacketNumber+1 { + panic("non-sequential packet number use") + } + } +} + +func (h *sentPacketHistory) SkippedPacket(pn protocol.PacketNumber) { + h.checkSequentialPacketNumberUse(pn) + h.highestPacketNumber = pn + h.packets = append(h.packets, &packet{ + PacketNumber: pn, + skippedPacket: true, + }) +} + +func (h *sentPacketHistory) SentNonAckElicitingPacket(pn protocol.PacketNumber) { + h.checkSequentialPacketNumberUse(pn) + h.highestPacketNumber = pn + if len(h.packets) > 0 { + h.packets = append(h.packets, nil) + } +} + +func (h *sentPacketHistory) SentAckElicitingPacket(p *packet) { + h.checkSequentialPacketNumberUse(p.PacketNumber) + h.highestPacketNumber = p.PacketNumber + h.packets = append(h.packets, p) + if p.outstanding() { + h.numOutstanding++ + } +} + +// Iterate iterates through all packets. +func (h *sentPacketHistory) Iterate(cb func(*packet) (cont bool, err error)) error { + for _, p := range h.packets { + if p == nil { + continue + } + cont, err := cb(p) + if err != nil { + return err + } + if !cont { + return nil + } + } + return nil +} + +// FirstOutstanding returns the first outstanding packet. +func (h *sentPacketHistory) FirstOutstanding() *packet { + if !h.HasOutstandingPackets() { + return nil + } + for _, p := range h.packets { + if p != nil && p.outstanding() { + return p + } + } + return nil +} + +func (h *sentPacketHistory) Len() int { + return len(h.packets) +} + +func (h *sentPacketHistory) Remove(pn protocol.PacketNumber) error { + idx, ok := h.getIndex(pn) + if !ok { + return fmt.Errorf("packet %d not found in sent packet history", pn) + } + p := h.packets[idx] + if p.outstanding() { + h.numOutstanding-- + if h.numOutstanding < 0 { + panic("negative number of outstanding packets") + } + } + h.packets[idx] = nil + // clean up all skipped packets directly before this packet number + for idx > 0 { + idx-- + p := h.packets[idx] + if p == nil || !p.skippedPacket { + break + } + h.packets[idx] = nil + } + if idx == 0 { + h.cleanupStart() + } + if len(h.packets) > 0 && h.packets[0] == nil { + panic("remove failed") + } + return nil +} + +// getIndex gets the index of packet p in the packets slice. +func (h *sentPacketHistory) getIndex(p protocol.PacketNumber) (int, bool) { + if len(h.packets) == 0 { + return 0, false + } + first := h.packets[0].PacketNumber + if p < first { + return 0, false + } + index := int(p - first) + if index > len(h.packets)-1 { + return 0, false + } + return index, true +} + +func (h *sentPacketHistory) HasOutstandingPackets() bool { + return h.numOutstanding > 0 +} + +// delete all nil entries at the beginning of the packets slice +func (h *sentPacketHistory) cleanupStart() { + for i, p := range h.packets { + if p != nil { + h.packets = h.packets[i:] + return + } + } + h.packets = h.packets[:0] +} + +func (h *sentPacketHistory) LowestPacketNumber() protocol.PacketNumber { + if len(h.packets) == 0 { + return protocol.InvalidPacketNumber + } + return h.packets[0].PacketNumber +} + +func (h *sentPacketHistory) DeclareLost(pn protocol.PacketNumber) { + idx, ok := h.getIndex(pn) + if !ok { + return + } + p := h.packets[idx] + if p.outstanding() { + h.numOutstanding-- + if h.numOutstanding < 0 { + panic("negative number of outstanding packets") + } + } + h.packets[idx] = nil + if idx == 0 { + h.cleanupStart() + } +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/u_ackhandler.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/u_ackhandler.go new file mode 100644 index 0000000..0e39e9d --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/u_ackhandler.go @@ -0,0 +1,24 @@ +package ackhandler + +import ( + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/logging" +) + +// [UQUIC] +func NewUAckHandler( + initialPacketNumber protocol.PacketNumber, + initialMaxDatagramSize protocol.ByteCount, + rttStats *utils.RTTStats, + clientAddressValidated bool, + enableECN bool, + pers protocol.Perspective, + tracer *logging.ConnectionTracer, + logger utils.Logger, +) (SentPacketHandler, ReceivedPacketHandler) { + sph := newSentPacketHandler(initialPacketNumber, initialMaxDatagramSize, rttStats, clientAddressValidated, enableECN, pers, tracer, logger) + return &uSentPacketHandler{ + sentPacketHandler: sph, + }, newReceivedPacketHandler(sph, logger) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/ackhandler/u_sent_packet_handler.go b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/u_sent_packet_handler.go new file mode 100644 index 0000000..6d999dd --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/ackhandler/u_sent_packet_handler.go @@ -0,0 +1,99 @@ +package ackhandler + +import "github.com/enetx/uquic/internal/protocol" + +type uSentPacketHandler struct { + *sentPacketHandler + + initialPacketNumberLength protocol.PacketNumberLen // [UQUIC] +} + +func (h *uSentPacketHandler) PeekPacketNumber(encLevel protocol.EncryptionLevel) (protocol.PacketNumber, protocol.PacketNumberLen) { + pnSpace := h.getPacketNumberSpace(encLevel) + pn := pnSpace.pns.Peek() + // See section 17.1 of RFC 9000. + + // [UQUIC] Otherwise it kinda breaks PN length mimicry. + if encLevel == protocol.EncryptionInitial && h.initialPacketNumberLength != 0 { + return pn, h.initialPacketNumberLength + } + // [/UQUIC] + + return pn, protocol.GetPacketNumberLengthForHeader(pn, pnSpace.largestAcked) +} + +// [UQUIC] +func SetInitialPacketNumberLength(h SentPacketHandler, pnLen protocol.PacketNumberLen) { + if sph, ok := h.(*uSentPacketHandler); ok { + sph.initialPacketNumberLength = pnLen + } +} + +// func (h *uSentPacketHandler) OnLossDetectionTimeout() error { +// defer h.setLossDetectionTimer() +// earliestLossTime, encLevel := h.getLossTimeAndSpace() +// if !earliestLossTime.IsZero() { +// if h.logger.Debug() { +// h.logger.Debugf("Loss detection alarm fired in loss timer mode. Loss time: %s", earliestLossTime) +// } +// if h.tracer != nil && h.tracer.LossTimerExpired != nil { +// h.tracer.LossTimerExpired(logging.TimerTypeACK, encLevel) +// } +// // Early retransmit or time loss detection +// return h.detectLostPackets(time.Now(), encLevel) +// } + +// // PTO +// // When all outstanding are acknowledged, the alarm is canceled in +// // setLossDetectionTimer. This doesn't reset the timer in the session though. +// // When OnAlarm is called, we therefore need to make sure that there are +// // actually packets outstanding. +// if h.bytesInFlight == 0 && !h.peerCompletedAddressValidation { +// h.ptoCount++ +// h.numProbesToSend++ +// if h.initialPackets != nil { +// h.ptoMode = SendPTOInitial +// } else if h.handshakePackets != nil { +// h.ptoMode = SendPTOHandshake +// } else { +// return errors.New("sentPacketHandler BUG: PTO fired, but bytes_in_flight is 0 and Initial and Handshake already dropped") +// } +// return nil +// } + +// _, encLevel, ok := h.getPTOTimeAndSpace() +// if !ok { +// return nil +// } +// if ps := h.getPacketNumberSpace(encLevel); !ps.history.HasOutstandingPackets() && !h.peerCompletedAddressValidation { +// return nil +// } +// h.ptoCount++ +// if h.logger.Debug() { +// h.logger.Debugf("Loss detection alarm for %s fired in PTO mode. PTO count: %d", encLevel, h.ptoCount) +// } +// if h.tracer != nil { +// if h.tracer.LossTimerExpired != nil { +// h.tracer.LossTimerExpired(logging.TimerTypePTO, encLevel) +// } +// if h.tracer.UpdatedPTOCount != nil { +// h.tracer.UpdatedPTOCount(h.ptoCount) +// } +// } +// h.numProbesToSend += 2 +// //nolint:exhaustive // We never arm a PTO timer for 0-RTT packets. +// switch encLevel { +// case protocol.EncryptionInitial: +// // h.ptoMode = SendPTOInitial // or quic-go will send fallback initial packets with different FRAME architecture +// case protocol.EncryptionHandshake: +// h.ptoMode = SendPTOHandshake +// case protocol.Encryption1RTT: +// // skip a packet number in order to elicit an immediate ACK +// pn := h.PopPacketNumber(protocol.Encryption1RTT) +// h.getPacketNumberSpace(protocol.Encryption1RTT).history.SkippedPacket(pn) +// h.ptoMode = SendPTOAppData +// default: +// return fmt.Errorf("PTO timer in unexpected encryption level: %s", encLevel) +// } +// return nil +// } diff --git a/backend/vendor/github.com/enetx/uquic/internal/congestion/bandwidth.go b/backend/vendor/github.com/enetx/uquic/internal/congestion/bandwidth.go new file mode 100644 index 0000000..d9f8793 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/congestion/bandwidth.go @@ -0,0 +1,25 @@ +package congestion + +import ( + "math" + "time" + + "github.com/enetx/uquic/internal/protocol" +) + +// Bandwidth of a connection +type Bandwidth uint64 + +const infBandwidth Bandwidth = math.MaxUint64 + +const ( + // BitsPerSecond is 1 bit per second + BitsPerSecond Bandwidth = 1 + // BytesPerSecond is 1 byte per second + BytesPerSecond = 8 * BitsPerSecond +) + +// BandwidthFromDelta calculates the bandwidth from a number of bytes and a time delta +func BandwidthFromDelta(bytes protocol.ByteCount, delta time.Duration) Bandwidth { + return Bandwidth(bytes) * Bandwidth(time.Second) / Bandwidth(delta) * BytesPerSecond +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/congestion/clock.go b/backend/vendor/github.com/enetx/uquic/internal/congestion/clock.go new file mode 100644 index 0000000..405fae7 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/congestion/clock.go @@ -0,0 +1,18 @@ +package congestion + +import "time" + +// A Clock returns the current time +type Clock interface { + Now() time.Time +} + +// DefaultClock implements the Clock interface using the Go stdlib clock. +type DefaultClock struct{} + +var _ Clock = DefaultClock{} + +// Now gets the current time +func (DefaultClock) Now() time.Time { + return time.Now() +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/congestion/cubic.go b/backend/vendor/github.com/enetx/uquic/internal/congestion/cubic.go new file mode 100644 index 0000000..dad1847 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/congestion/cubic.go @@ -0,0 +1,213 @@ +package congestion + +import ( + "math" + "time" + + "github.com/enetx/uquic/internal/protocol" +) + +// This cubic implementation is based on the one found in Chromiums's QUIC +// implementation, in the files net/quic/congestion_control/cubic.{hh,cc}. + +// Constants based on TCP defaults. +// The following constants are in 2^10 fractions of a second instead of ms to +// allow a 10 shift right to divide. + +// 1024*1024^3 (first 1024 is from 0.100^3) +// where 0.100 is 100 ms which is the scaling round trip time. +const ( + cubeScale = 40 + cubeCongestionWindowScale = 410 + cubeFactor protocol.ByteCount = 1 << cubeScale / cubeCongestionWindowScale / maxDatagramSize + // TODO: when re-enabling cubic, make sure to use the actual packet size here + maxDatagramSize = protocol.ByteCount(protocol.InitialPacketSizeIPv4) +) + +const defaultNumConnections = 1 + +// Default Cubic backoff factor +const beta float32 = 0.7 + +// Additional backoff factor when loss occurs in the concave part of the Cubic +// curve. This additional backoff factor is expected to give up bandwidth to +// new concurrent flows and speed up convergence. +const betaLastMax float32 = 0.85 + +// Cubic implements the cubic algorithm from TCP +type Cubic struct { + clock Clock + + // Number of connections to simulate. + numConnections int + + // Time when this cycle started, after last loss event. + epoch time.Time + + // Max congestion window used just before last loss event. + // Note: to improve fairness to other streams an additional back off is + // applied to this value if the new value is below our latest value. + lastMaxCongestionWindow protocol.ByteCount + + // Number of acked bytes since the cycle started (epoch). + ackedBytesCount protocol.ByteCount + + // TCP Reno equivalent congestion window in packets. + estimatedTCPcongestionWindow protocol.ByteCount + + // Origin point of cubic function. + originPointCongestionWindow protocol.ByteCount + + // Time to origin point of cubic function in 2^10 fractions of a second. + timeToOriginPoint uint32 + + // Last congestion window in packets computed by cubic function. + lastTargetCongestionWindow protocol.ByteCount +} + +// NewCubic returns a new Cubic instance +func NewCubic(clock Clock) *Cubic { + c := &Cubic{ + clock: clock, + numConnections: defaultNumConnections, + } + c.Reset() + return c +} + +// Reset is called after a timeout to reset the cubic state +func (c *Cubic) Reset() { + c.epoch = time.Time{} + c.lastMaxCongestionWindow = 0 + c.ackedBytesCount = 0 + c.estimatedTCPcongestionWindow = 0 + c.originPointCongestionWindow = 0 + c.timeToOriginPoint = 0 + c.lastTargetCongestionWindow = 0 +} + +func (c *Cubic) alpha() float32 { + // TCPFriendly alpha is described in Section 3.3 of the CUBIC paper. Note that + // beta here is a cwnd multiplier, and is equal to 1-beta from the paper. + // We derive the equivalent alpha for an N-connection emulation as: + b := c.beta() + return 3 * float32(c.numConnections) * float32(c.numConnections) * (1 - b) / (1 + b) +} + +func (c *Cubic) beta() float32 { + // kNConnectionBeta is the backoff factor after loss for our N-connection + // emulation, which emulates the effective backoff of an ensemble of N + // TCP-Reno connections on a single loss event. The effective multiplier is + // computed as: + return (float32(c.numConnections) - 1 + beta) / float32(c.numConnections) +} + +func (c *Cubic) betaLastMax() float32 { + // betaLastMax is the additional backoff factor after loss for our + // N-connection emulation, which emulates the additional backoff of + // an ensemble of N TCP-Reno connections on a single loss event. The + // effective multiplier is computed as: + return (float32(c.numConnections) - 1 + betaLastMax) / float32(c.numConnections) +} + +// OnApplicationLimited is called on ack arrival when sender is unable to use +// the available congestion window. Resets Cubic state during quiescence. +func (c *Cubic) OnApplicationLimited() { + // When sender is not using the available congestion window, the window does + // not grow. But to be RTT-independent, Cubic assumes that the sender has been + // using the entire window during the time since the beginning of the current + // "epoch" (the end of the last loss recovery period). Since + // application-limited periods break this assumption, we reset the epoch when + // in such a period. This reset effectively freezes congestion window growth + // through application-limited periods and allows Cubic growth to continue + // when the entire window is being used. + c.epoch = time.Time{} +} + +// CongestionWindowAfterPacketLoss computes a new congestion window to use after +// a loss event. Returns the new congestion window in packets. The new +// congestion window is a multiplicative decrease of our current window. +func (c *Cubic) CongestionWindowAfterPacketLoss(currentCongestionWindow protocol.ByteCount) protocol.ByteCount { + if currentCongestionWindow+maxDatagramSize < c.lastMaxCongestionWindow { + // We never reached the old max, so assume we are competing with another + // flow. Use our extra back off factor to allow the other flow to go up. + c.lastMaxCongestionWindow = protocol.ByteCount(c.betaLastMax() * float32(currentCongestionWindow)) + } else { + c.lastMaxCongestionWindow = currentCongestionWindow + } + c.epoch = time.Time{} // Reset time. + return protocol.ByteCount(float32(currentCongestionWindow) * c.beta()) +} + +// CongestionWindowAfterAck computes a new congestion window to use after a received ACK. +// Returns the new congestion window in packets. The new congestion window +// follows a cubic function that depends on the time passed since last +// packet loss. +func (c *Cubic) CongestionWindowAfterAck( + ackedBytes protocol.ByteCount, + currentCongestionWindow protocol.ByteCount, + delayMin time.Duration, + eventTime time.Time, +) protocol.ByteCount { + c.ackedBytesCount += ackedBytes + + if c.epoch.IsZero() { + // First ACK after a loss event. + c.epoch = eventTime // Start of epoch. + c.ackedBytesCount = ackedBytes // Reset count. + // Reset estimated_tcp_congestion_window_ to be in sync with cubic. + c.estimatedTCPcongestionWindow = currentCongestionWindow + if c.lastMaxCongestionWindow <= currentCongestionWindow { + c.timeToOriginPoint = 0 + c.originPointCongestionWindow = currentCongestionWindow + } else { + c.timeToOriginPoint = uint32(math.Cbrt(float64(cubeFactor * (c.lastMaxCongestionWindow - currentCongestionWindow)))) + c.originPointCongestionWindow = c.lastMaxCongestionWindow + } + } + + // Change the time unit from microseconds to 2^10 fractions per second. Take + // the round trip time in account. This is done to allow us to use shift as a + // divide operator. + elapsedTime := int64(eventTime.Add(delayMin).Sub(c.epoch)/time.Microsecond) << 10 / (1000 * 1000) + + // Right-shifts of negative, signed numbers have implementation-dependent + // behavior, so force the offset to be positive, as is done in the kernel. + offset := int64(c.timeToOriginPoint) - elapsedTime + if offset < 0 { + offset = -offset + } + + deltaCongestionWindow := protocol.ByteCount(cubeCongestionWindowScale*offset*offset*offset) * maxDatagramSize >> cubeScale + var targetCongestionWindow protocol.ByteCount + if elapsedTime > int64(c.timeToOriginPoint) { + targetCongestionWindow = c.originPointCongestionWindow + deltaCongestionWindow + } else { + targetCongestionWindow = c.originPointCongestionWindow - deltaCongestionWindow + } + // Limit the CWND increase to half the acked bytes. + targetCongestionWindow = min(targetCongestionWindow, currentCongestionWindow+c.ackedBytesCount/2) + + // Increase the window by approximately Alpha * 1 MSS of bytes every + // time we ack an estimated tcp window of bytes. For small + // congestion windows (less than 25), the formula below will + // increase slightly slower than linearly per estimated tcp window + // of bytes. + c.estimatedTCPcongestionWindow += protocol.ByteCount(float32(c.ackedBytesCount) * c.alpha() * float32(maxDatagramSize) / float32(c.estimatedTCPcongestionWindow)) + c.ackedBytesCount = 0 + + // We have a new cubic congestion window. + c.lastTargetCongestionWindow = targetCongestionWindow + + // Compute target congestion_window based on cubic target and estimated TCP + // congestion_window, use highest (fastest). + if targetCongestionWindow < c.estimatedTCPcongestionWindow { + targetCongestionWindow = c.estimatedTCPcongestionWindow + } + return targetCongestionWindow +} + +// SetNumConnections sets the number of emulated connections +func (c *Cubic) SetNumConnections(n int) { + c.numConnections = n +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/congestion/cubic_sender.go b/backend/vendor/github.com/enetx/uquic/internal/congestion/cubic_sender.go new file mode 100644 index 0000000..3cf3cb8 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/congestion/cubic_sender.go @@ -0,0 +1,316 @@ +package congestion + +import ( + "fmt" + "time" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/logging" +) + +const ( + // maxDatagramSize is the default maximum packet size used in the Linux TCP implementation. + // Used in QUIC for congestion window computations in bytes. + initialMaxDatagramSize = protocol.ByteCount(protocol.InitialPacketSizeIPv4) + maxBurstPackets = 3 + renoBeta = 0.7 // Reno backoff factor. + minCongestionWindowPackets = 2 + initialCongestionWindow = 32 +) + +type cubicSender struct { + hybridSlowStart HybridSlowStart + rttStats *utils.RTTStats + cubic *Cubic + pacer *pacer + clock Clock + + reno bool + + // Track the largest packet that has been sent. + largestSentPacketNumber protocol.PacketNumber + + // Track the largest packet that has been acked. + largestAckedPacketNumber protocol.PacketNumber + + // Track the largest packet number outstanding when a CWND cutback occurs. + largestSentAtLastCutback protocol.PacketNumber + + // Whether the last loss event caused us to exit slowstart. + // Used for stats collection of slowstartPacketsLost + lastCutbackExitedSlowstart bool + + // Congestion window in bytes. + congestionWindow protocol.ByteCount + + // Slow start congestion window in bytes, aka ssthresh. + slowStartThreshold protocol.ByteCount + + // ACK counter for the Reno implementation. + numAckedPackets uint64 + + initialCongestionWindow protocol.ByteCount + initialMaxCongestionWindow protocol.ByteCount + + maxDatagramSize protocol.ByteCount + + lastState logging.CongestionState + tracer *logging.ConnectionTracer +} + +var ( + _ SendAlgorithm = &cubicSender{} + _ SendAlgorithmWithDebugInfos = &cubicSender{} +) + +// NewCubicSender makes a new cubic sender +func NewCubicSender( + clock Clock, + rttStats *utils.RTTStats, + initialMaxDatagramSize protocol.ByteCount, + reno bool, + tracer *logging.ConnectionTracer, +) *cubicSender { + return newCubicSender( + clock, + rttStats, + reno, + initialMaxDatagramSize, + initialCongestionWindow*initialMaxDatagramSize, + protocol.MaxCongestionWindowPackets*initialMaxDatagramSize, + tracer, + ) +} + +func newCubicSender( + clock Clock, + rttStats *utils.RTTStats, + reno bool, + initialMaxDatagramSize, + initialCongestionWindow, + initialMaxCongestionWindow protocol.ByteCount, + tracer *logging.ConnectionTracer, +) *cubicSender { + c := &cubicSender{ + rttStats: rttStats, + largestSentPacketNumber: protocol.InvalidPacketNumber, + largestAckedPacketNumber: protocol.InvalidPacketNumber, + largestSentAtLastCutback: protocol.InvalidPacketNumber, + initialCongestionWindow: initialCongestionWindow, + initialMaxCongestionWindow: initialMaxCongestionWindow, + congestionWindow: initialCongestionWindow, + slowStartThreshold: protocol.MaxByteCount, + cubic: NewCubic(clock), + clock: clock, + reno: reno, + tracer: tracer, + maxDatagramSize: initialMaxDatagramSize, + } + c.pacer = newPacer(c.BandwidthEstimate) + if c.tracer != nil && c.tracer.UpdatedCongestionState != nil { + c.lastState = logging.CongestionStateSlowStart + c.tracer.UpdatedCongestionState(logging.CongestionStateSlowStart) + } + return c +} + +// TimeUntilSend returns when the next packet should be sent. +func (c *cubicSender) TimeUntilSend(_ protocol.ByteCount) time.Time { + return c.pacer.TimeUntilSend() +} + +func (c *cubicSender) HasPacingBudget(now time.Time) bool { + return c.pacer.Budget(now) >= c.maxDatagramSize +} + +func (c *cubicSender) maxCongestionWindow() protocol.ByteCount { + return c.maxDatagramSize * protocol.MaxCongestionWindowPackets +} + +func (c *cubicSender) minCongestionWindow() protocol.ByteCount { + return c.maxDatagramSize * minCongestionWindowPackets +} + +func (c *cubicSender) OnPacketSent( + sentTime time.Time, + _ protocol.ByteCount, + packetNumber protocol.PacketNumber, + bytes protocol.ByteCount, + isRetransmittable bool, +) { + c.pacer.SentPacket(sentTime, bytes) + if !isRetransmittable { + return + } + c.largestSentPacketNumber = packetNumber + c.hybridSlowStart.OnPacketSent(packetNumber) +} + +func (c *cubicSender) CanSend(bytesInFlight protocol.ByteCount) bool { + return bytesInFlight < c.GetCongestionWindow() +} + +func (c *cubicSender) InRecovery() bool { + return c.largestAckedPacketNumber != protocol.InvalidPacketNumber && c.largestAckedPacketNumber <= c.largestSentAtLastCutback +} + +func (c *cubicSender) InSlowStart() bool { + return c.GetCongestionWindow() < c.slowStartThreshold +} + +func (c *cubicSender) GetCongestionWindow() protocol.ByteCount { + return c.congestionWindow +} + +func (c *cubicSender) MaybeExitSlowStart() { + if c.InSlowStart() && + c.hybridSlowStart.ShouldExitSlowStart(c.rttStats.LatestRTT(), c.rttStats.MinRTT(), c.GetCongestionWindow()/c.maxDatagramSize) { + // exit slow start + c.slowStartThreshold = c.congestionWindow + c.maybeTraceStateChange(logging.CongestionStateCongestionAvoidance) + } +} + +func (c *cubicSender) OnPacketAcked( + ackedPacketNumber protocol.PacketNumber, + ackedBytes protocol.ByteCount, + priorInFlight protocol.ByteCount, + eventTime time.Time, +) { + c.largestAckedPacketNumber = max(ackedPacketNumber, c.largestAckedPacketNumber) + if c.InRecovery() { + return + } + c.maybeIncreaseCwnd(ackedPacketNumber, ackedBytes, priorInFlight, eventTime) + if c.InSlowStart() { + c.hybridSlowStart.OnPacketAcked(ackedPacketNumber) + } +} + +func (c *cubicSender) OnCongestionEvent(packetNumber protocol.PacketNumber, lostBytes, priorInFlight protocol.ByteCount) { + // TCP NewReno (RFC6582) says that once a loss occurs, any losses in packets + // already sent should be treated as a single loss event, since it's expected. + if packetNumber <= c.largestSentAtLastCutback { + return + } + c.lastCutbackExitedSlowstart = c.InSlowStart() + c.maybeTraceStateChange(logging.CongestionStateRecovery) + + if c.reno { + c.congestionWindow = protocol.ByteCount(float64(c.congestionWindow) * renoBeta) + } else { + c.congestionWindow = c.cubic.CongestionWindowAfterPacketLoss(c.congestionWindow) + } + if minCwnd := c.minCongestionWindow(); c.congestionWindow < minCwnd { + c.congestionWindow = minCwnd + } + c.slowStartThreshold = c.congestionWindow + c.largestSentAtLastCutback = c.largestSentPacketNumber + // reset packet count from congestion avoidance mode. We start + // counting again when we're out of recovery. + c.numAckedPackets = 0 +} + +// Called when we receive an ack. Normal TCP tracks how many packets one ack +// represents, but quic has a separate ack for each packet. +func (c *cubicSender) maybeIncreaseCwnd( + _ protocol.PacketNumber, + ackedBytes protocol.ByteCount, + priorInFlight protocol.ByteCount, + eventTime time.Time, +) { + // Do not increase the congestion window unless the sender is close to using + // the current window. + if !c.isCwndLimited(priorInFlight) { + c.cubic.OnApplicationLimited() + c.maybeTraceStateChange(logging.CongestionStateApplicationLimited) + return + } + if c.congestionWindow >= c.maxCongestionWindow() { + return + } + if c.InSlowStart() { + // TCP slow start, exponential growth, increase by one for each ACK. + c.congestionWindow += c.maxDatagramSize + c.maybeTraceStateChange(logging.CongestionStateSlowStart) + return + } + // Congestion avoidance + c.maybeTraceStateChange(logging.CongestionStateCongestionAvoidance) + if c.reno { + // Classic Reno congestion avoidance. + c.numAckedPackets++ + if c.numAckedPackets >= uint64(c.congestionWindow/c.maxDatagramSize) { + c.congestionWindow += c.maxDatagramSize + c.numAckedPackets = 0 + } + } else { + c.congestionWindow = min(c.maxCongestionWindow(), c.cubic.CongestionWindowAfterAck(ackedBytes, c.congestionWindow, c.rttStats.MinRTT(), eventTime)) + } +} + +func (c *cubicSender) isCwndLimited(bytesInFlight protocol.ByteCount) bool { + congestionWindow := c.GetCongestionWindow() + if bytesInFlight >= congestionWindow { + return true + } + availableBytes := congestionWindow - bytesInFlight + slowStartLimited := c.InSlowStart() && bytesInFlight > congestionWindow/2 + return slowStartLimited || availableBytes <= maxBurstPackets*c.maxDatagramSize +} + +// BandwidthEstimate returns the current bandwidth estimate +func (c *cubicSender) BandwidthEstimate() Bandwidth { + srtt := c.rttStats.SmoothedRTT() + if srtt == 0 { + // If we haven't measured an rtt, the bandwidth estimate is unknown. + return infBandwidth + } + return BandwidthFromDelta(c.GetCongestionWindow(), srtt) +} + +// OnRetransmissionTimeout is called on an retransmission timeout +func (c *cubicSender) OnRetransmissionTimeout(packetsRetransmitted bool) { + c.largestSentAtLastCutback = protocol.InvalidPacketNumber + if !packetsRetransmitted { + return + } + c.hybridSlowStart.Restart() + c.cubic.Reset() + c.slowStartThreshold = c.congestionWindow / 2 + c.congestionWindow = c.minCongestionWindow() +} + +// OnConnectionMigration is called when the connection is migrated (?) +func (c *cubicSender) OnConnectionMigration() { + c.hybridSlowStart.Restart() + c.largestSentPacketNumber = protocol.InvalidPacketNumber + c.largestAckedPacketNumber = protocol.InvalidPacketNumber + c.largestSentAtLastCutback = protocol.InvalidPacketNumber + c.lastCutbackExitedSlowstart = false + c.cubic.Reset() + c.numAckedPackets = 0 + c.congestionWindow = c.initialCongestionWindow + c.slowStartThreshold = c.initialMaxCongestionWindow +} + +func (c *cubicSender) maybeTraceStateChange(new logging.CongestionState) { + if c.tracer == nil || c.tracer.UpdatedCongestionState == nil || new == c.lastState { + return + } + c.tracer.UpdatedCongestionState(new) + c.lastState = new +} + +func (c *cubicSender) SetMaxDatagramSize(s protocol.ByteCount) { + if s < c.maxDatagramSize { + panic(fmt.Sprintf("congestion BUG: decreased max datagram size from %d to %d", c.maxDatagramSize, s)) + } + cwndIsMinCwnd := c.congestionWindow == c.minCongestionWindow() + c.maxDatagramSize = s + if cwndIsMinCwnd { + c.congestionWindow = c.minCongestionWindow() + } + c.pacer.SetMaxDatagramSize(s) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/congestion/hybrid_slow_start.go b/backend/vendor/github.com/enetx/uquic/internal/congestion/hybrid_slow_start.go new file mode 100644 index 0000000..e046ab7 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/congestion/hybrid_slow_start.go @@ -0,0 +1,112 @@ +package congestion + +import ( + "time" + + "github.com/enetx/uquic/internal/protocol" +) + +// Note(pwestin): the magic clamping numbers come from the original code in +// tcp_cubic.c. +const hybridStartLowWindow = protocol.ByteCount(16) + +// Number of delay samples for detecting the increase of delay. +const hybridStartMinSamples = uint32(8) + +// Exit slow start if the min rtt has increased by more than 1/8th. +const hybridStartDelayFactorExp = 3 // 2^3 = 8 +// The original paper specifies 2 and 8ms, but those have changed over time. +const ( + hybridStartDelayMinThresholdUs = int64(4000) + hybridStartDelayMaxThresholdUs = int64(16000) +) + +// HybridSlowStart implements the TCP hybrid slow start algorithm +type HybridSlowStart struct { + endPacketNumber protocol.PacketNumber + lastSentPacketNumber protocol.PacketNumber + started bool + currentMinRTT time.Duration + rttSampleCount uint32 + hystartFound bool +} + +// StartReceiveRound is called for the start of each receive round (burst) in the slow start phase. +func (s *HybridSlowStart) StartReceiveRound(lastSent protocol.PacketNumber) { + s.endPacketNumber = lastSent + s.currentMinRTT = 0 + s.rttSampleCount = 0 + s.started = true +} + +// IsEndOfRound returns true if this ack is the last packet number of our current slow start round. +func (s *HybridSlowStart) IsEndOfRound(ack protocol.PacketNumber) bool { + return s.endPacketNumber < ack +} + +// ShouldExitSlowStart should be called on every new ack frame, since a new +// RTT measurement can be made then. +// rtt: the RTT for this ack packet. +// minRTT: is the lowest delay (RTT) we have seen during the session. +// congestionWindow: the congestion window in packets. +func (s *HybridSlowStart) ShouldExitSlowStart(latestRTT time.Duration, minRTT time.Duration, congestionWindow protocol.ByteCount) bool { + if !s.started { + // Time to start the hybrid slow start. + s.StartReceiveRound(s.lastSentPacketNumber) + } + if s.hystartFound { + return true + } + // Second detection parameter - delay increase detection. + // Compare the minimum delay (s.currentMinRTT) of the current + // burst of packets relative to the minimum delay during the session. + // Note: we only look at the first few(8) packets in each burst, since we + // only want to compare the lowest RTT of the burst relative to previous + // bursts. + s.rttSampleCount++ + if s.rttSampleCount <= hybridStartMinSamples { + if s.currentMinRTT == 0 || s.currentMinRTT > latestRTT { + s.currentMinRTT = latestRTT + } + } + // We only need to check this once per round. + if s.rttSampleCount == hybridStartMinSamples { + // Divide minRTT by 8 to get a rtt increase threshold for exiting. + minRTTincreaseThresholdUs := int64(minRTT / time.Microsecond >> hybridStartDelayFactorExp) + // Ensure the rtt threshold is never less than 2ms or more than 16ms. + minRTTincreaseThresholdUs = min(minRTTincreaseThresholdUs, hybridStartDelayMaxThresholdUs) + minRTTincreaseThreshold := time.Duration(max(minRTTincreaseThresholdUs, hybridStartDelayMinThresholdUs)) * time.Microsecond + + if s.currentMinRTT > (minRTT + minRTTincreaseThreshold) { + s.hystartFound = true + } + } + // Exit from slow start if the cwnd is greater than 16 and + // increasing delay is found. + return congestionWindow >= hybridStartLowWindow && s.hystartFound +} + +// OnPacketSent is called when a packet was sent +func (s *HybridSlowStart) OnPacketSent(packetNumber protocol.PacketNumber) { + s.lastSentPacketNumber = packetNumber +} + +// OnPacketAcked gets invoked after ShouldExitSlowStart, so it's best to end +// the round when the final packet of the burst is received and start it on +// the next incoming ack. +func (s *HybridSlowStart) OnPacketAcked(ackedPacketNumber protocol.PacketNumber) { + if s.IsEndOfRound(ackedPacketNumber) { + s.started = false + } +} + +// Started returns true if started +func (s *HybridSlowStart) Started() bool { + return s.started +} + +// Restart the slow start phase +func (s *HybridSlowStart) Restart() { + s.started = false + s.hystartFound = false +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/congestion/interface.go b/backend/vendor/github.com/enetx/uquic/internal/congestion/interface.go new file mode 100644 index 0000000..830918c --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/congestion/interface.go @@ -0,0 +1,28 @@ +package congestion + +import ( + "time" + + "github.com/enetx/uquic/internal/protocol" +) + +// A SendAlgorithm performs congestion control +type SendAlgorithm interface { + TimeUntilSend(bytesInFlight protocol.ByteCount) time.Time + HasPacingBudget(now time.Time) bool + OnPacketSent(sentTime time.Time, bytesInFlight protocol.ByteCount, packetNumber protocol.PacketNumber, bytes protocol.ByteCount, isRetransmittable bool) + CanSend(bytesInFlight protocol.ByteCount) bool + MaybeExitSlowStart() + OnPacketAcked(number protocol.PacketNumber, ackedBytes protocol.ByteCount, priorInFlight protocol.ByteCount, eventTime time.Time) + OnCongestionEvent(number protocol.PacketNumber, lostBytes protocol.ByteCount, priorInFlight protocol.ByteCount) + OnRetransmissionTimeout(packetsRetransmitted bool) + SetMaxDatagramSize(protocol.ByteCount) +} + +// A SendAlgorithmWithDebugInfos is a SendAlgorithm that exposes some debug infos +type SendAlgorithmWithDebugInfos interface { + SendAlgorithm + InSlowStart() bool + InRecovery() bool + GetCongestionWindow() protocol.ByteCount +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/congestion/pacer.go b/backend/vendor/github.com/enetx/uquic/internal/congestion/pacer.go new file mode 100644 index 0000000..c330f14 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/congestion/pacer.go @@ -0,0 +1,84 @@ +package congestion + +import ( + "time" + + "github.com/enetx/uquic/internal/protocol" +) + +const maxBurstSizePackets = 10 + +// The pacer implements a token bucket pacing algorithm. +type pacer struct { + budgetAtLastSent protocol.ByteCount + maxDatagramSize protocol.ByteCount + lastSentTime time.Time + adjustedBandwidth func() uint64 // in bytes/s +} + +func newPacer(getBandwidth func() Bandwidth) *pacer { + p := &pacer{ + maxDatagramSize: initialMaxDatagramSize, + adjustedBandwidth: func() uint64 { + // Bandwidth is in bits/s. We need the value in bytes/s. + bw := uint64(getBandwidth() / BytesPerSecond) + // Use a slightly higher value than the actual measured bandwidth. + // RTT variations then won't result in under-utilization of the congestion window. + // Ultimately, this will result in sending packets as acknowledgments are received rather than when timers fire, + // provided the congestion window is fully utilized and acknowledgments arrive at regular intervals. + return bw * 5 / 4 + }, + } + p.budgetAtLastSent = p.maxBurstSize() + return p +} + +func (p *pacer) SentPacket(sendTime time.Time, size protocol.ByteCount) { + budget := p.Budget(sendTime) + if size >= budget { + p.budgetAtLastSent = 0 + } else { + p.budgetAtLastSent = budget - size + } + p.lastSentTime = sendTime +} + +func (p *pacer) Budget(now time.Time) protocol.ByteCount { + if p.lastSentTime.IsZero() { + return p.maxBurstSize() + } + budget := p.budgetAtLastSent + (protocol.ByteCount(p.adjustedBandwidth())*protocol.ByteCount(now.Sub(p.lastSentTime).Nanoseconds()))/1e9 + if budget < 0 { // protect against overflows + budget = protocol.MaxByteCount + } + return min(p.maxBurstSize(), budget) +} + +func (p *pacer) maxBurstSize() protocol.ByteCount { + return max( + protocol.ByteCount(uint64((protocol.MinPacingDelay+protocol.TimerGranularity).Nanoseconds())*p.adjustedBandwidth())/1e9, + maxBurstSizePackets*p.maxDatagramSize, + ) +} + +// TimeUntilSend returns when the next packet should be sent. +// It returns the zero value of time.Time if a packet can be sent immediately. +func (p *pacer) TimeUntilSend() time.Time { + if p.budgetAtLastSent >= p.maxDatagramSize { + return time.Time{} + } + diff := 1e9 * uint64(p.maxDatagramSize-p.budgetAtLastSent) + bw := p.adjustedBandwidth() + // We might need to round up this value. + // Otherwise, we might have a budget (slightly) smaller than the datagram size when the timer expires. + d := diff / bw + // this is effectively a math.Ceil, but using only integer math + if diff%bw > 0 { + d++ + } + return p.lastSentTime.Add(max(protocol.MinPacingDelay, time.Duration(d)*time.Nanosecond)) +} + +func (p *pacer) SetMaxDatagramSize(s protocol.ByteCount) { + p.maxDatagramSize = s +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/flowcontrol/base_flow_controller.go b/backend/vendor/github.com/enetx/uquic/internal/flowcontrol/base_flow_controller.go new file mode 100644 index 0000000..68f7144 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/flowcontrol/base_flow_controller.go @@ -0,0 +1,127 @@ +package flowcontrol + +import ( + "sync" + "time" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" +) + +type baseFlowController struct { + // for sending data + bytesSent protocol.ByteCount + sendWindow protocol.ByteCount + lastBlockedAt protocol.ByteCount + + // for receiving data + //nolint:structcheck // The mutex is used both by the stream and the connection flow controller + mutex sync.Mutex + bytesRead protocol.ByteCount + highestReceived protocol.ByteCount + receiveWindow protocol.ByteCount + receiveWindowSize protocol.ByteCount + maxReceiveWindowSize protocol.ByteCount + + allowWindowIncrease func(size protocol.ByteCount) bool + + epochStartTime time.Time + epochStartOffset protocol.ByteCount + rttStats *utils.RTTStats + + logger utils.Logger +} + +// IsNewlyBlocked says if it is newly blocked by flow control. +// For every offset, it only returns true once. +// If it is blocked, the offset is returned. +func (c *baseFlowController) IsNewlyBlocked() (bool, protocol.ByteCount) { + if c.sendWindowSize() != 0 || c.sendWindow == c.lastBlockedAt { + return false, 0 + } + c.lastBlockedAt = c.sendWindow + return true, c.sendWindow +} + +func (c *baseFlowController) AddBytesSent(n protocol.ByteCount) { + c.bytesSent += n +} + +// UpdateSendWindow is called after receiving a MAX_{STREAM_}DATA frame. +func (c *baseFlowController) UpdateSendWindow(offset protocol.ByteCount) (updated bool) { + if offset > c.sendWindow { + c.sendWindow = offset + return true + } + return false +} + +func (c *baseFlowController) sendWindowSize() protocol.ByteCount { + // this only happens during connection establishment, when data is sent before we receive the peer's transport parameters + if c.bytesSent > c.sendWindow { + return 0 + } + return c.sendWindow - c.bytesSent +} + +// needs to be called with locked mutex +func (c *baseFlowController) addBytesRead(n protocol.ByteCount) { + // pretend we sent a WindowUpdate when reading the first byte + // this way auto-tuning of the window size already works for the first WindowUpdate + if c.bytesRead == 0 { + c.startNewAutoTuningEpoch(time.Now()) + } + c.bytesRead += n +} + +func (c *baseFlowController) hasWindowUpdate() bool { + bytesRemaining := c.receiveWindow - c.bytesRead + // update the window when more than the threshold was consumed + return bytesRemaining <= protocol.ByteCount(float64(c.receiveWindowSize)*(1-protocol.WindowUpdateThreshold)) +} + +// getWindowUpdate updates the receive window, if necessary +// it returns the new offset +func (c *baseFlowController) getWindowUpdate() protocol.ByteCount { + if !c.hasWindowUpdate() { + return 0 + } + + c.maybeAdjustWindowSize() + c.receiveWindow = c.bytesRead + c.receiveWindowSize + return c.receiveWindow +} + +// maybeAdjustWindowSize increases the receiveWindowSize if we're sending updates too often. +// For details about auto-tuning, see https://docs.google.com/document/d/1SExkMmGiz8VYzV3s9E35JQlJ73vhzCekKkDi85F1qCE/edit?usp=sharing. +func (c *baseFlowController) maybeAdjustWindowSize() { + bytesReadInEpoch := c.bytesRead - c.epochStartOffset + // don't do anything if less than half the window has been consumed + if bytesReadInEpoch <= c.receiveWindowSize/2 { + return + } + rtt := c.rttStats.SmoothedRTT() + if rtt == 0 { + return + } + + fraction := float64(bytesReadInEpoch) / float64(c.receiveWindowSize) + now := time.Now() + if now.Sub(c.epochStartTime) < time.Duration(4*fraction*float64(rtt)) { + // window is consumed too fast, try to increase the window size + newSize := min(2*c.receiveWindowSize, c.maxReceiveWindowSize) + if newSize > c.receiveWindowSize && (c.allowWindowIncrease == nil || c.allowWindowIncrease(newSize-c.receiveWindowSize)) { + c.receiveWindowSize = newSize + } + } + c.startNewAutoTuningEpoch(now) +} + +func (c *baseFlowController) startNewAutoTuningEpoch(now time.Time) { + c.epochStartTime = now + c.epochStartOffset = c.bytesRead +} + +func (c *baseFlowController) checkFlowControlViolation() bool { + return c.highestReceived > c.receiveWindow +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/flowcontrol/connection_flow_controller.go b/backend/vendor/github.com/enetx/uquic/internal/flowcontrol/connection_flow_controller.go new file mode 100644 index 0000000..884a97c --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/flowcontrol/connection_flow_controller.go @@ -0,0 +1,112 @@ +package flowcontrol + +import ( + "errors" + "fmt" + "time" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/utils" +) + +type connectionFlowController struct { + baseFlowController + + queueWindowUpdate func() +} + +var _ ConnectionFlowController = &connectionFlowController{} + +// NewConnectionFlowController gets a new flow controller for the connection +// It is created before we receive the peer's transport parameters, thus it starts with a sendWindow of 0. +func NewConnectionFlowController( + receiveWindow protocol.ByteCount, + maxReceiveWindow protocol.ByteCount, + queueWindowUpdate func(), + allowWindowIncrease func(size protocol.ByteCount) bool, + rttStats *utils.RTTStats, + logger utils.Logger, +) ConnectionFlowController { + return &connectionFlowController{ + baseFlowController: baseFlowController{ + rttStats: rttStats, + receiveWindow: receiveWindow, + receiveWindowSize: receiveWindow, + maxReceiveWindowSize: maxReceiveWindow, + allowWindowIncrease: allowWindowIncrease, + logger: logger, + }, + queueWindowUpdate: queueWindowUpdate, + } +} + +func (c *connectionFlowController) SendWindowSize() protocol.ByteCount { + return c.baseFlowController.sendWindowSize() +} + +// IncrementHighestReceived adds an increment to the highestReceived value +func (c *connectionFlowController) IncrementHighestReceived(increment protocol.ByteCount) error { + c.mutex.Lock() + defer c.mutex.Unlock() + + c.highestReceived += increment + if c.checkFlowControlViolation() { + return &qerr.TransportError{ + ErrorCode: qerr.FlowControlError, + ErrorMessage: fmt.Sprintf("received %d bytes for the connection, allowed %d bytes", c.highestReceived, c.receiveWindow), + } + } + return nil +} + +func (c *connectionFlowController) AddBytesRead(n protocol.ByteCount) { + c.mutex.Lock() + c.baseFlowController.addBytesRead(n) + shouldQueueWindowUpdate := c.hasWindowUpdate() + c.mutex.Unlock() + if shouldQueueWindowUpdate { + c.queueWindowUpdate() + } +} + +func (c *connectionFlowController) GetWindowUpdate() protocol.ByteCount { + c.mutex.Lock() + oldWindowSize := c.receiveWindowSize + offset := c.baseFlowController.getWindowUpdate() + if oldWindowSize < c.receiveWindowSize { + c.logger.Debugf("Increasing receive flow control window for the connection to %d kB", c.receiveWindowSize/(1<<10)) + } + c.mutex.Unlock() + return offset +} + +// EnsureMinimumWindowSize sets a minimum window size +// it should make sure that the connection-level window is increased when a stream-level window grows +func (c *connectionFlowController) EnsureMinimumWindowSize(inc protocol.ByteCount) { + c.mutex.Lock() + if inc > c.receiveWindowSize { + c.logger.Debugf("Increasing receive flow control window for the connection to %d kB, in response to stream flow control window increase", c.receiveWindowSize/(1<<10)) + newSize := min(inc, c.maxReceiveWindowSize) + if delta := newSize - c.receiveWindowSize; delta > 0 && c.allowWindowIncrease(delta) { + c.receiveWindowSize = newSize + } + c.startNewAutoTuningEpoch(time.Now()) + } + c.mutex.Unlock() +} + +// Reset rests the flow controller. This happens when 0-RTT is rejected. +// All stream data is invalidated, it's if we had never opened a stream and never sent any data. +// At that point, we only have sent stream data, but we didn't have the keys to open 1-RTT keys yet. +func (c *connectionFlowController) Reset() error { + c.mutex.Lock() + defer c.mutex.Unlock() + + if c.bytesRead > 0 || c.highestReceived > 0 || !c.epochStartTime.IsZero() { + return errors.New("flow controller reset after reading data") + } + c.bytesSent = 0 + c.lastBlockedAt = 0 + return nil +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/flowcontrol/interface.go b/backend/vendor/github.com/enetx/uquic/internal/flowcontrol/interface.go new file mode 100644 index 0000000..9b8e617 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/flowcontrol/interface.go @@ -0,0 +1,41 @@ +package flowcontrol + +import "github.com/enetx/uquic/internal/protocol" + +type flowController interface { + // for sending + SendWindowSize() protocol.ByteCount + UpdateSendWindow(protocol.ByteCount) (updated bool) + AddBytesSent(protocol.ByteCount) + // for receiving + AddBytesRead(protocol.ByteCount) + GetWindowUpdate() protocol.ByteCount // returns 0 if no update is necessary + IsNewlyBlocked() (bool, protocol.ByteCount) +} + +// A StreamFlowController is a flow controller for a QUIC stream. +type StreamFlowController interface { + flowController + // UpdateHighestReceived is called when a new highest offset is received + // final has to be to true if this is the final offset of the stream, + // as contained in a STREAM frame with FIN bit, and the RESET_STREAM frame + UpdateHighestReceived(offset protocol.ByteCount, final bool) error + // Abandon is called when reading from the stream is aborted early, + // and there won't be any further calls to AddBytesRead. + Abandon() +} + +// The ConnectionFlowController is the flow controller for the connection. +type ConnectionFlowController interface { + flowController + Reset() error +} + +type connectionFlowControllerI interface { + ConnectionFlowController + // The following two methods are not supposed to be called from outside this packet, but are needed internally + // for sending + EnsureMinimumWindowSize(protocol.ByteCount) + // for receiving + IncrementHighestReceived(protocol.ByteCount) error +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/flowcontrol/stream_flow_controller.go b/backend/vendor/github.com/enetx/uquic/internal/flowcontrol/stream_flow_controller.go new file mode 100644 index 0000000..0cfb9d2 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/flowcontrol/stream_flow_controller.go @@ -0,0 +1,149 @@ +package flowcontrol + +import ( + "fmt" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/utils" +) + +type streamFlowController struct { + baseFlowController + + streamID protocol.StreamID + + queueWindowUpdate func() + + connection connectionFlowControllerI + + receivedFinalOffset bool +} + +var _ StreamFlowController = &streamFlowController{} + +// NewStreamFlowController gets a new flow controller for a stream +func NewStreamFlowController( + streamID protocol.StreamID, + cfc ConnectionFlowController, + receiveWindow protocol.ByteCount, + maxReceiveWindow protocol.ByteCount, + initialSendWindow protocol.ByteCount, + queueWindowUpdate func(protocol.StreamID), + rttStats *utils.RTTStats, + logger utils.Logger, +) StreamFlowController { + return &streamFlowController{ + streamID: streamID, + connection: cfc.(connectionFlowControllerI), + queueWindowUpdate: func() { queueWindowUpdate(streamID) }, + baseFlowController: baseFlowController{ + rttStats: rttStats, + receiveWindow: receiveWindow, + receiveWindowSize: receiveWindow, + maxReceiveWindowSize: maxReceiveWindow, + sendWindow: initialSendWindow, + logger: logger, + }, + } +} + +// UpdateHighestReceived updates the highestReceived value, if the offset is higher. +func (c *streamFlowController) UpdateHighestReceived(offset protocol.ByteCount, final bool) error { + // If the final offset for this stream is already known, check for consistency. + if c.receivedFinalOffset { + // If we receive another final offset, check that it's the same. + if final && offset != c.highestReceived { + return &qerr.TransportError{ + ErrorCode: qerr.FinalSizeError, + ErrorMessage: fmt.Sprintf("received inconsistent final offset for stream %d (old: %d, new: %d bytes)", c.streamID, c.highestReceived, offset), + } + } + // Check that the offset is below the final offset. + if offset > c.highestReceived { + return &qerr.TransportError{ + ErrorCode: qerr.FinalSizeError, + ErrorMessage: fmt.Sprintf("received offset %d for stream %d, but final offset was already received at %d", offset, c.streamID, c.highestReceived), + } + } + } + + if final { + c.receivedFinalOffset = true + } + if offset == c.highestReceived { + return nil + } + // A higher offset was received before. + // This can happen due to reordering. + if offset <= c.highestReceived { + if final { + return &qerr.TransportError{ + ErrorCode: qerr.FinalSizeError, + ErrorMessage: fmt.Sprintf("received final offset %d for stream %d, but already received offset %d before", offset, c.streamID, c.highestReceived), + } + } + return nil + } + + increment := offset - c.highestReceived + c.highestReceived = offset + if c.checkFlowControlViolation() { + return &qerr.TransportError{ + ErrorCode: qerr.FlowControlError, + ErrorMessage: fmt.Sprintf("received %d bytes on stream %d, allowed %d bytes", offset, c.streamID, c.receiveWindow), + } + } + return c.connection.IncrementHighestReceived(increment) +} + +func (c *streamFlowController) AddBytesRead(n protocol.ByteCount) { + c.mutex.Lock() + c.baseFlowController.addBytesRead(n) + shouldQueueWindowUpdate := c.shouldQueueWindowUpdate() + c.mutex.Unlock() + if shouldQueueWindowUpdate { + c.queueWindowUpdate() + } + c.connection.AddBytesRead(n) +} + +func (c *streamFlowController) Abandon() { + c.mutex.Lock() + unread := c.highestReceived - c.bytesRead + c.mutex.Unlock() + if unread > 0 { + c.connection.AddBytesRead(unread) + } +} + +func (c *streamFlowController) AddBytesSent(n protocol.ByteCount) { + c.baseFlowController.AddBytesSent(n) + c.connection.AddBytesSent(n) +} + +func (c *streamFlowController) SendWindowSize() protocol.ByteCount { + return min(c.baseFlowController.sendWindowSize(), c.connection.SendWindowSize()) +} + +func (c *streamFlowController) shouldQueueWindowUpdate() bool { + return !c.receivedFinalOffset && c.hasWindowUpdate() +} + +func (c *streamFlowController) GetWindowUpdate() protocol.ByteCount { + // If we already received the final offset for this stream, the peer won't need any additional flow control credit. + if c.receivedFinalOffset { + return 0 + } + + // Don't use defer for unlocking the mutex here, GetWindowUpdate() is called frequently and defer shows up in the profiler + c.mutex.Lock() + oldWindowSize := c.receiveWindowSize + offset := c.baseFlowController.getWindowUpdate() + if c.receiveWindowSize > oldWindowSize { // auto-tuning enlarged the window size + c.logger.Debugf("Increasing receive flow control window for stream %d to %d kB", c.streamID, c.receiveWindowSize/(1<<10)) + c.connection.EnsureMinimumWindowSize(protocol.ByteCount(float64(c.receiveWindowSize) * protocol.ConnectionFlowControlMultiplier)) + } + c.mutex.Unlock() + return offset +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/handshake/aead.go b/backend/vendor/github.com/enetx/uquic/internal/handshake/aead.go new file mode 100644 index 0000000..3906a83 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/handshake/aead.go @@ -0,0 +1,90 @@ +package handshake + +import ( + "encoding/binary" + + "github.com/enetx/uquic/internal/protocol" +) + +func createAEAD(suite *cipherSuite, trafficSecret []byte, v protocol.Version) *xorNonceAEAD { + keyLabel := hkdfLabelKeyV1 + ivLabel := hkdfLabelIVV1 + if v == protocol.Version2 { + keyLabel = hkdfLabelKeyV2 + ivLabel = hkdfLabelIVV2 + } + key := hkdfExpandLabel(suite.Hash, trafficSecret, []byte{}, keyLabel, suite.KeyLen) + iv := hkdfExpandLabel(suite.Hash, trafficSecret, []byte{}, ivLabel, suite.IVLen()) + return suite.AEAD(key, iv) +} + +type longHeaderSealer struct { + aead *xorNonceAEAD + headerProtector headerProtector + nonceBuf [8]byte +} + +var _ LongHeaderSealer = &longHeaderSealer{} + +func newLongHeaderSealer(aead *xorNonceAEAD, headerProtector headerProtector) LongHeaderSealer { + if aead.NonceSize() != 8 { + panic("unexpected nonce size") + } + return &longHeaderSealer{ + aead: aead, + headerProtector: headerProtector, + } +} + +func (s *longHeaderSealer) Seal(dst, src []byte, pn protocol.PacketNumber, ad []byte) []byte { + binary.BigEndian.PutUint64(s.nonceBuf[:], uint64(pn)) + return s.aead.Seal(dst, s.nonceBuf[:], src, ad) +} + +func (s *longHeaderSealer) EncryptHeader(sample []byte, firstByte *byte, pnBytes []byte) { + s.headerProtector.EncryptHeader(sample, firstByte, pnBytes) +} + +func (s *longHeaderSealer) Overhead() int { + return s.aead.Overhead() +} + +type longHeaderOpener struct { + aead *xorNonceAEAD + headerProtector headerProtector + highestRcvdPN protocol.PacketNumber // highest packet number received (which could be successfully unprotected) + + // use a single array to avoid allocations + nonceBuf [8]byte +} + +var _ LongHeaderOpener = &longHeaderOpener{} + +func newLongHeaderOpener(aead *xorNonceAEAD, headerProtector headerProtector) LongHeaderOpener { + if aead.NonceSize() != 8 { + panic("unexpected nonce size") + } + return &longHeaderOpener{ + aead: aead, + headerProtector: headerProtector, + } +} + +func (o *longHeaderOpener) DecodePacketNumber(wirePN protocol.PacketNumber, wirePNLen protocol.PacketNumberLen) protocol.PacketNumber { + return protocol.DecodePacketNumber(wirePNLen, o.highestRcvdPN, wirePN) +} + +func (o *longHeaderOpener) Open(dst, src []byte, pn protocol.PacketNumber, ad []byte) ([]byte, error) { + binary.BigEndian.PutUint64(o.nonceBuf[:], uint64(pn)) + dec, err := o.aead.Open(dst, o.nonceBuf[:], src, ad) + if err == nil { + o.highestRcvdPN = max(o.highestRcvdPN, pn) + } else { + err = ErrDecryptionFailed + } + return dec, err +} + +func (o *longHeaderOpener) DecryptHeader(sample []byte, firstByte *byte, pnBytes []byte) { + o.headerProtector.DecryptHeader(sample, firstByte, pnBytes) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/handshake/cipher_suite.go b/backend/vendor/github.com/enetx/uquic/internal/handshake/cipher_suite.go new file mode 100644 index 0000000..b473c70 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/handshake/cipher_suite.go @@ -0,0 +1,105 @@ +package handshake + +import ( + "crypto" + "crypto/aes" + "crypto/cipher" + "fmt" + + tls "github.com/enetx/utls" + + "golang.org/x/crypto/chacha20poly1305" +) + +// These cipher suite implementations are copied from the standard library crypto/tls package. + +const aeadNonceLength = 12 + +type cipherSuite struct { + ID uint16 + Hash crypto.Hash + KeyLen int + AEAD func(key, nonceMask []byte) *xorNonceAEAD +} + +func (s cipherSuite) IVLen() int { return aeadNonceLength } + +func getCipherSuite(id uint16) *cipherSuite { + switch id { + case tls.TLS_AES_128_GCM_SHA256: + return &cipherSuite{ID: tls.TLS_AES_128_GCM_SHA256, Hash: crypto.SHA256, KeyLen: 16, AEAD: aeadAESGCMTLS13} + case tls.TLS_CHACHA20_POLY1305_SHA256: + return &cipherSuite{ID: tls.TLS_CHACHA20_POLY1305_SHA256, Hash: crypto.SHA256, KeyLen: 32, AEAD: aeadChaCha20Poly1305} + case tls.TLS_AES_256_GCM_SHA384: + return &cipherSuite{ID: tls.TLS_AES_256_GCM_SHA384, Hash: crypto.SHA384, KeyLen: 32, AEAD: aeadAESGCMTLS13} + default: + panic(fmt.Sprintf("unknown cypher suite: %d", id)) + } +} + +func aeadAESGCMTLS13(key, nonceMask []byte) *xorNonceAEAD { + if len(nonceMask) != aeadNonceLength { + panic("tls: internal error: wrong nonce length") + } + aes, err := aes.NewCipher(key) + if err != nil { + panic(err) + } + aead, err := cipher.NewGCM(aes) + if err != nil { + panic(err) + } + + ret := &xorNonceAEAD{aead: aead} + copy(ret.nonceMask[:], nonceMask) + return ret +} + +func aeadChaCha20Poly1305(key, nonceMask []byte) *xorNonceAEAD { + if len(nonceMask) != aeadNonceLength { + panic("tls: internal error: wrong nonce length") + } + aead, err := chacha20poly1305.New(key) + if err != nil { + panic(err) + } + + ret := &xorNonceAEAD{aead: aead} + copy(ret.nonceMask[:], nonceMask) + return ret +} + +// xorNonceAEAD wraps an AEAD by XORing in a fixed pattern to the nonce +// before each call. +type xorNonceAEAD struct { + nonceMask [aeadNonceLength]byte + aead cipher.AEAD +} + +func (f *xorNonceAEAD) NonceSize() int { return 8 } // 64-bit sequence number +func (f *xorNonceAEAD) Overhead() int { return f.aead.Overhead() } +func (f *xorNonceAEAD) explicitNonceLen() int { return 0 } + +func (f *xorNonceAEAD) Seal(out, nonce, plaintext, additionalData []byte) []byte { + for i, b := range nonce { + f.nonceMask[4+i] ^= b + } + result := f.aead.Seal(out, f.nonceMask[:], plaintext, additionalData) + for i, b := range nonce { + f.nonceMask[4+i] ^= b + } + + return result +} + +func (f *xorNonceAEAD) Open(out, nonce, ciphertext, additionalData []byte) ([]byte, error) { + for i, b := range nonce { + f.nonceMask[4+i] ^= b + } + result, err := f.aead.Open(out, f.nonceMask[:], ciphertext, additionalData) + for i, b := range nonce { + f.nonceMask[4+i] ^= b + } + + return result, err +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/handshake/conn.go b/backend/vendor/github.com/enetx/uquic/internal/handshake/conn.go new file mode 100644 index 0000000..54af823 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/handshake/conn.go @@ -0,0 +1,21 @@ +package handshake + +import ( + "net" + "time" +) + +type conn struct { + localAddr, remoteAddr net.Addr +} + +var _ net.Conn = &conn{} + +func (c *conn) Read([]byte) (int, error) { return 0, nil } +func (c *conn) Write([]byte) (int, error) { return 0, nil } +func (c *conn) Close() error { return nil } +func (c *conn) RemoteAddr() net.Addr { return c.remoteAddr } +func (c *conn) LocalAddr() net.Addr { return c.localAddr } +func (c *conn) SetReadDeadline(time.Time) error { return nil } +func (c *conn) SetWriteDeadline(time.Time) error { return nil } +func (c *conn) SetDeadline(time.Time) error { return nil } diff --git a/backend/vendor/github.com/enetx/uquic/internal/handshake/crypto_setup.go b/backend/vendor/github.com/enetx/uquic/internal/handshake/crypto_setup.go new file mode 100644 index 0000000..82454e2 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/handshake/crypto_setup.go @@ -0,0 +1,664 @@ +package handshake + +import ( + "bytes" + "context" + "errors" + "fmt" + "net" + "strings" + "sync/atomic" + "time" + + tls "github.com/enetx/utls" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/qtls" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/internal/wire" + "github.com/enetx/uquic/logging" + "github.com/enetx/uquic/quicvarint" +) + +type quicVersionContextKey struct{} + +var QUICVersionContextKey = &quicVersionContextKey{} + +const clientSessionStateRevision = 4 + +type cryptoSetup struct { + tlsConf *tls.Config + conn *tls.QUICConn + + events []Event + + version protocol.Version + + ourParams *wire.TransportParameters + peerParams *wire.TransportParameters + + zeroRTTParameters *wire.TransportParameters + allow0RTT bool + + rttStats *utils.RTTStats + + tracer *logging.ConnectionTracer + logger utils.Logger + + perspective protocol.Perspective + + handshakeCompleteTime time.Time + + zeroRTTOpener LongHeaderOpener // only set for the server + zeroRTTSealer LongHeaderSealer // only set for the client + + initialOpener LongHeaderOpener + initialSealer LongHeaderSealer + + handshakeOpener LongHeaderOpener + handshakeSealer LongHeaderSealer + + used0RTT atomic.Bool + + aead *updatableAEAD + has1RTTSealer bool + has1RTTOpener bool +} + +var _ CryptoSetup = &cryptoSetup{} + +// NewCryptoSetupClient creates a new crypto setup for the client +func NewCryptoSetupClient( + connID protocol.ConnectionID, + tp *wire.TransportParameters, + tlsConf *tls.Config, + enable0RTT bool, + rttStats *utils.RTTStats, + tracer *logging.ConnectionTracer, + logger utils.Logger, + version protocol.Version, +) CryptoSetup { + cs := newCryptoSetup( + connID, + tp, + rttStats, + tracer, + logger, + protocol.PerspectiveClient, + version, + ) + + tlsConf = tlsConf.Clone() + tlsConf.MinVersion = tls.VersionTLS13 + quicConf := &tls.QUICConfig{TLSConfig: tlsConf} + qtls.SetupConfigForClient(quicConf, cs.marshalDataForSessionState, cs.handleDataFromSessionState) + cs.tlsConf = tlsConf + cs.allow0RTT = enable0RTT + + cs.conn = tls.QUICClient(quicConf) + cs.conn.SetTransportParameters(cs.ourParams.Marshal(protocol.PerspectiveClient)) + + return cs +} + +// NewCryptoSetupServer creates a new crypto setup for the server +func NewCryptoSetupServer( + connID protocol.ConnectionID, + localAddr, remoteAddr net.Addr, + tp *wire.TransportParameters, + tlsConf *tls.Config, + allow0RTT bool, + rttStats *utils.RTTStats, + tracer *logging.ConnectionTracer, + logger utils.Logger, + version protocol.Version, +) CryptoSetup { + cs := newCryptoSetup( + connID, + tp, + rttStats, + tracer, + logger, + protocol.PerspectiveServer, + version, + ) + cs.allow0RTT = allow0RTT + + quicConf := &tls.QUICConfig{TLSConfig: tlsConf} + qtls.SetupConfigForServer(quicConf, cs.allow0RTT, cs.getDataForSessionTicket, cs.handleSessionTicket) + addConnToClientHelloInfo(quicConf.TLSConfig, localAddr, remoteAddr) + + cs.tlsConf = quicConf.TLSConfig + cs.conn = tls.QUICServer(quicConf) + + return cs +} + +// The tls.Config contains two callbacks that pass in a tls.ClientHelloInfo. +// Since crypto/tls doesn't do it, we need to make sure to set the Conn field with a fake net.Conn +// that allows the caller to get the local and the remote address. +func addConnToClientHelloInfo(conf *tls.Config, localAddr, remoteAddr net.Addr) { + if conf.GetConfigForClient != nil { + gcfc := conf.GetConfigForClient + conf.GetConfigForClient = func(info *tls.ClientHelloInfo) (*tls.Config, error) { + info.Conn = &conn{localAddr: localAddr, remoteAddr: remoteAddr} + c, err := gcfc(info) + if c != nil { + c = c.Clone() + // This won't be necessary anymore once https://github.com/golang/go/issues/63722 is accepted. + c.MinVersion = tls.VersionTLS13 + // We're returning a tls.Config here, so we need to apply this recursively. + addConnToClientHelloInfo(c, localAddr, remoteAddr) + } + return c, err + } + } + if conf.GetCertificate != nil { + gc := conf.GetCertificate + conf.GetCertificate = func(info *tls.ClientHelloInfo) (*tls.Certificate, error) { + info.Conn = &conn{localAddr: localAddr, remoteAddr: remoteAddr} + return gc(info) + } + } +} + +func newCryptoSetup( + connID protocol.ConnectionID, + tp *wire.TransportParameters, + rttStats *utils.RTTStats, + tracer *logging.ConnectionTracer, + logger utils.Logger, + perspective protocol.Perspective, + version protocol.Version, +) *cryptoSetup { + initialSealer, initialOpener := NewInitialAEAD(connID, perspective, version) + if tracer != nil && tracer.UpdatedKeyFromTLS != nil { + tracer.UpdatedKeyFromTLS(protocol.EncryptionInitial, protocol.PerspectiveClient) + tracer.UpdatedKeyFromTLS(protocol.EncryptionInitial, protocol.PerspectiveServer) + } + return &cryptoSetup{ + initialSealer: initialSealer, + initialOpener: initialOpener, + aead: newUpdatableAEAD(rttStats, tracer, logger, version), + events: make([]Event, 0, 16), + ourParams: tp, + rttStats: rttStats, + tracer: tracer, + logger: logger, + perspective: perspective, + version: version, + } +} + +func (h *cryptoSetup) ChangeConnectionID(id protocol.ConnectionID) { + initialSealer, initialOpener := NewInitialAEAD(id, h.perspective, h.version) + h.initialSealer = initialSealer + h.initialOpener = initialOpener + if h.tracer != nil && h.tracer.UpdatedKeyFromTLS != nil { + h.tracer.UpdatedKeyFromTLS(protocol.EncryptionInitial, protocol.PerspectiveClient) + h.tracer.UpdatedKeyFromTLS(protocol.EncryptionInitial, protocol.PerspectiveServer) + } +} + +func (h *cryptoSetup) SetLargest1RTTAcked(pn protocol.PacketNumber) error { + return h.aead.SetLargestAcked(pn) +} + +func (h *cryptoSetup) StartHandshake() error { + err := h.conn.Start(context.WithValue(context.Background(), QUICVersionContextKey, h.version)) + if err != nil { + return wrapError(err) + } + for { + ev := h.conn.NextEvent() + done, err := h.handleEvent(ev) + if err != nil { + return wrapError(err) + } + if done { + break + } + } + if h.perspective == protocol.PerspectiveClient { + if h.zeroRTTSealer != nil && h.zeroRTTParameters != nil { + h.logger.Debugf("Doing 0-RTT.") + h.events = append(h.events, Event{Kind: EventRestoredTransportParameters, TransportParameters: h.zeroRTTParameters}) + } else { + h.logger.Debugf("Not doing 0-RTT. Has sealer: %t, has params: %t", h.zeroRTTSealer != nil, h.zeroRTTParameters != nil) + } + } + return nil +} + +// Close closes the crypto setup. +// It aborts the handshake, if it is still running. +func (h *cryptoSetup) Close() error { + return h.conn.Close() +} + +// HandleMessage handles a TLS handshake message. +// It is called by the crypto streams when a new message is available. +func (h *cryptoSetup) HandleMessage(data []byte, encLevel protocol.EncryptionLevel) error { + if err := h.handleMessage(data, encLevel); err != nil { + return wrapError(err) + } + return nil +} + +func (h *cryptoSetup) handleMessage(data []byte, encLevel protocol.EncryptionLevel) error { + if err := h.conn.HandleData(qtls.ToTLSEncryptionLevel(encLevel), data); err != nil { + return err + } + for { + ev := h.conn.NextEvent() + done, err := h.handleEvent(ev) + if err != nil { + return err + } + if done { + return nil + } + } +} + +func (h *cryptoSetup) handleEvent(ev tls.QUICEvent) (done bool, err error) { + switch ev.Kind { + case tls.QUICNoEvent: + return true, nil + case tls.QUICSetReadSecret: + h.setReadKey(ev.Level, ev.Suite, ev.Data) + return false, nil + case tls.QUICSetWriteSecret: + h.setWriteKey(ev.Level, ev.Suite, ev.Data) + return false, nil + case tls.QUICTransportParameters: + return false, h.handleTransportParameters(ev.Data) + case tls.QUICTransportParametersRequired: + h.conn.SetTransportParameters(h.ourParams.Marshal(h.perspective)) + return false, nil + case tls.QUICRejectedEarlyData: + h.rejected0RTT() + return false, nil + case tls.QUICWriteData: + h.writeRecord(ev.Level, ev.Data) + return false, nil + case tls.QUICHandshakeDone: + h.handshakeComplete() + return false, nil + default: + return false, fmt.Errorf("unexpected event: %d", ev.Kind) + } +} + +func (h *cryptoSetup) NextEvent() Event { + if len(h.events) == 0 { + return Event{Kind: EventNoEvent} + } + ev := h.events[0] + h.events = h.events[1:] + return ev +} + +func (h *cryptoSetup) handleTransportParameters(data []byte) error { + var tp wire.TransportParameters + if err := tp.Unmarshal(data, h.perspective.Opposite()); err != nil { + return err + } + h.peerParams = &tp + h.events = append(h.events, Event{Kind: EventReceivedTransportParameters, TransportParameters: h.peerParams}) + return nil +} + +// must be called after receiving the transport parameters +func (h *cryptoSetup) marshalDataForSessionState(earlyData bool) []byte { + b := make([]byte, 0, 256) + b = quicvarint.Append(b, clientSessionStateRevision) + b = quicvarint.Append(b, uint64(h.rttStats.SmoothedRTT().Microseconds())) + if earlyData { + // only save the transport parameters for 0-RTT enabled session tickets + return h.peerParams.MarshalForSessionTicket(b) + } + return b +} + +func (h *cryptoSetup) handleDataFromSessionState(data []byte, earlyData bool) (allowEarlyData bool) { + rtt, tp, err := decodeDataFromSessionState(data, earlyData) + if err != nil { + h.logger.Debugf("Restoring of transport parameters from session ticket failed: %s", err.Error()) + return + } + h.rttStats.SetInitialRTT(rtt) + // The session ticket might have been saved from a connection that allowed 0-RTT, + // and therefore contain transport parameters. + // Only use them if 0-RTT is actually used on the new connection. + if tp != nil && h.allow0RTT { + h.zeroRTTParameters = tp + return true + } + return false +} + +func decodeDataFromSessionState(data []byte, earlyData bool) (time.Duration, *wire.TransportParameters, error) { + r := bytes.NewReader(data) + ver, err := quicvarint.Read(r) + if err != nil { + return 0, nil, err + } + if ver != clientSessionStateRevision { + return 0, nil, fmt.Errorf("mismatching version. Got %d, expected %d", ver, clientSessionStateRevision) + } + rttEncoded, err := quicvarint.Read(r) + if err != nil { + return 0, nil, err + } + rtt := time.Duration(rttEncoded) * time.Microsecond + if !earlyData { + return rtt, nil, nil + } + var tp wire.TransportParameters + if err := tp.UnmarshalFromSessionTicket(r); err != nil { + return 0, nil, err + } + return rtt, &tp, nil +} + +func (h *cryptoSetup) getDataForSessionTicket() []byte { + ticket := &sessionTicket{ + RTT: h.rttStats.SmoothedRTT(), + } + if h.allow0RTT { + ticket.Parameters = h.ourParams + } + return ticket.Marshal() +} + +// GetSessionTicket generates a new session ticket. +// Due to limitations in crypto/tls, it's only possible to generate a single session ticket per connection. +// It is only valid for the server. +func (h *cryptoSetup) GetSessionTicket() ([]byte, error) { + if err := h.conn.SendSessionTicket(tls.QUICSessionTicketOptions{ + EarlyData: h.allow0RTT, + }); err != nil { + // Session tickets might be disabled by tls.Config.SessionTicketsDisabled. + // We can't check h.tlsConfig here, since the actual config might have been obtained from + // the GetConfigForClient callback. + // See https://github.com/golang/go/issues/62032. + // Once that issue is resolved, this error assertion can be removed. + if strings.Contains(err.Error(), "session ticket keys unavailable") { + return nil, nil + } + return nil, err + } + ev := h.conn.NextEvent() + if ev.Kind != tls.QUICWriteData || ev.Level != tls.QUICEncryptionLevelApplication { + panic("crypto/tls bug: where's my session ticket?") + } + ticket := ev.Data + if ev := h.conn.NextEvent(); ev.Kind != tls.QUICNoEvent { + panic("crypto/tls bug: why more than one ticket?") + } + return ticket, nil +} + +// handleSessionTicket is called for the server when receiving the client's session ticket. +// It reads parameters from the session ticket and checks whether to accept 0-RTT if the session ticket enabled 0-RTT. +// Note that the fact that the session ticket allows 0-RTT doesn't mean that the actual TLS handshake enables 0-RTT: +// A client may use a 0-RTT enabled session to resume a TLS session without using 0-RTT. +func (h *cryptoSetup) handleSessionTicket(sessionTicketData []byte, using0RTT bool) bool { + var t sessionTicket + if err := t.Unmarshal(sessionTicketData, using0RTT); err != nil { + h.logger.Debugf("Unmarshalling session ticket failed: %s", err.Error()) + return false + } + h.rttStats.SetInitialRTT(t.RTT) + if !using0RTT { + return false + } + valid := h.ourParams.ValidFor0RTT(t.Parameters) + if !valid { + h.logger.Debugf("Transport parameters changed. Rejecting 0-RTT.") + return false + } + if !h.allow0RTT { + h.logger.Debugf("0-RTT not allowed. Rejecting 0-RTT.") + return false + } + h.logger.Debugf("Accepting 0-RTT. Restoring RTT from session ticket: %s", t.RTT) + return true +} + +// rejected0RTT is called for the client when the server rejects 0-RTT. +func (h *cryptoSetup) rejected0RTT() { + h.logger.Debugf("0-RTT was rejected. Dropping 0-RTT keys.") + + had0RTTKeys := h.zeroRTTSealer != nil + h.zeroRTTSealer = nil + + if had0RTTKeys { + h.events = append(h.events, Event{Kind: EventDiscard0RTTKeys}) + } +} + +func (h *cryptoSetup) setReadKey(el tls.QUICEncryptionLevel, suiteID uint16, trafficSecret []byte) { + suite := getCipherSuite(suiteID) + //nolint:exhaustive // The TLS stack doesn't export Initial keys. + switch el { + case tls.QUICEncryptionLevelEarly: + if h.perspective == protocol.PerspectiveClient { + panic("Received 0-RTT read key for the client") + } + h.zeroRTTOpener = newLongHeaderOpener( + createAEAD(suite, trafficSecret, h.version), + newHeaderProtector(suite, trafficSecret, true, h.version), + ) + h.used0RTT.Store(true) + if h.logger.Debug() { + h.logger.Debugf("Installed 0-RTT Read keys (using %s)", tls.CipherSuiteName(suite.ID)) + } + case tls.QUICEncryptionLevelHandshake: + h.handshakeOpener = newLongHeaderOpener( + createAEAD(suite, trafficSecret, h.version), + newHeaderProtector(suite, trafficSecret, true, h.version), + ) + if h.logger.Debug() { + h.logger.Debugf("Installed Handshake Read keys (using %s)", tls.CipherSuiteName(suite.ID)) + } + case tls.QUICEncryptionLevelApplication: + h.aead.SetReadKey(suite, trafficSecret) + h.has1RTTOpener = true + if h.logger.Debug() { + h.logger.Debugf("Installed 1-RTT Read keys (using %s)", tls.CipherSuiteName(suite.ID)) + } + default: + panic("unexpected read encryption level") + } + h.events = append(h.events, Event{Kind: EventReceivedReadKeys}) + if h.tracer != nil && h.tracer.UpdatedKeyFromTLS != nil { + h.tracer.UpdatedKeyFromTLS(qtls.FromTLSEncryptionLevel(el), h.perspective.Opposite()) + } +} + +func (h *cryptoSetup) setWriteKey(el tls.QUICEncryptionLevel, suiteID uint16, trafficSecret []byte) { + suite := getCipherSuite(suiteID) + //nolint:exhaustive // The TLS stack doesn't export Initial keys. + switch el { + case tls.QUICEncryptionLevelEarly: + if h.perspective == protocol.PerspectiveServer { + panic("Received 0-RTT write key for the server") + } + h.zeroRTTSealer = newLongHeaderSealer( + createAEAD(suite, trafficSecret, h.version), + newHeaderProtector(suite, trafficSecret, true, h.version), + ) + if h.logger.Debug() { + h.logger.Debugf("Installed 0-RTT Write keys (using %s)", tls.CipherSuiteName(suite.ID)) + } + if h.tracer != nil && h.tracer.UpdatedKeyFromTLS != nil { + h.tracer.UpdatedKeyFromTLS(protocol.Encryption0RTT, h.perspective) + } + // don't set used0RTT here. 0-RTT might still get rejected. + return + case tls.QUICEncryptionLevelHandshake: + h.handshakeSealer = newLongHeaderSealer( + createAEAD(suite, trafficSecret, h.version), + newHeaderProtector(suite, trafficSecret, true, h.version), + ) + if h.logger.Debug() { + h.logger.Debugf("Installed Handshake Write keys (using %s)", tls.CipherSuiteName(suite.ID)) + } + case tls.QUICEncryptionLevelApplication: + h.aead.SetWriteKey(suite, trafficSecret) + h.has1RTTSealer = true + if h.logger.Debug() { + h.logger.Debugf("Installed 1-RTT Write keys (using %s)", tls.CipherSuiteName(suite.ID)) + } + if h.zeroRTTSealer != nil { + // Once we receive handshake keys, we know that 0-RTT was not rejected. + h.used0RTT.Store(true) + h.zeroRTTSealer = nil + h.logger.Debugf("Dropping 0-RTT keys.") + if h.tracer != nil && h.tracer.DroppedEncryptionLevel != nil { + h.tracer.DroppedEncryptionLevel(protocol.Encryption0RTT) + } + } + default: + panic("unexpected write encryption level") + } + if h.tracer != nil && h.tracer.UpdatedKeyFromTLS != nil { + h.tracer.UpdatedKeyFromTLS(qtls.FromTLSEncryptionLevel(el), h.perspective) + } +} + +// writeRecord is called when TLS writes data +func (h *cryptoSetup) writeRecord(encLevel tls.QUICEncryptionLevel, p []byte) { + //nolint:exhaustive // handshake records can only be written for Initial and Handshake. + switch encLevel { + case tls.QUICEncryptionLevelInitial: + h.events = append(h.events, Event{Kind: EventWriteInitialData, Data: p}) + case tls.QUICEncryptionLevelHandshake: + h.events = append(h.events, Event{Kind: EventWriteHandshakeData, Data: p}) + case tls.QUICEncryptionLevelApplication: + panic("unexpected write") + default: + panic(fmt.Sprintf("unexpected write encryption level: %s", encLevel)) + } +} + +func (h *cryptoSetup) DiscardInitialKeys() { + dropped := h.initialOpener != nil + h.initialOpener = nil + h.initialSealer = nil + if dropped { + h.logger.Debugf("Dropping Initial keys.") + } +} + +func (h *cryptoSetup) handshakeComplete() { + h.handshakeCompleteTime = time.Now() + h.events = append(h.events, Event{Kind: EventHandshakeComplete}) +} + +func (h *cryptoSetup) SetHandshakeConfirmed() { + h.aead.SetHandshakeConfirmed() + // drop Handshake keys + var dropped bool + if h.handshakeOpener != nil { + h.handshakeOpener = nil + h.handshakeSealer = nil + dropped = true + } + if dropped { + h.logger.Debugf("Dropping Handshake keys.") + } +} + +func (h *cryptoSetup) GetInitialSealer() (LongHeaderSealer, error) { + if h.initialSealer == nil { + return nil, ErrKeysDropped + } + return h.initialSealer, nil +} + +func (h *cryptoSetup) Get0RTTSealer() (LongHeaderSealer, error) { + if h.zeroRTTSealer == nil { + return nil, ErrKeysDropped + } + return h.zeroRTTSealer, nil +} + +func (h *cryptoSetup) GetHandshakeSealer() (LongHeaderSealer, error) { + if h.handshakeSealer == nil { + if h.initialSealer == nil { + return nil, ErrKeysDropped + } + return nil, ErrKeysNotYetAvailable + } + return h.handshakeSealer, nil +} + +func (h *cryptoSetup) Get1RTTSealer() (ShortHeaderSealer, error) { + if !h.has1RTTSealer { + return nil, ErrKeysNotYetAvailable + } + return h.aead, nil +} + +func (h *cryptoSetup) GetInitialOpener() (LongHeaderOpener, error) { + if h.initialOpener == nil { + return nil, ErrKeysDropped + } + return h.initialOpener, nil +} + +func (h *cryptoSetup) Get0RTTOpener() (LongHeaderOpener, error) { + if h.zeroRTTOpener == nil { + if h.initialOpener != nil { + return nil, ErrKeysNotYetAvailable + } + // if the initial opener is also not available, the keys were already dropped + return nil, ErrKeysDropped + } + return h.zeroRTTOpener, nil +} + +func (h *cryptoSetup) GetHandshakeOpener() (LongHeaderOpener, error) { + if h.handshakeOpener == nil { + if h.initialOpener != nil { + return nil, ErrKeysNotYetAvailable + } + // if the initial opener is also not available, the keys were already dropped + return nil, ErrKeysDropped + } + return h.handshakeOpener, nil +} + +func (h *cryptoSetup) Get1RTTOpener() (ShortHeaderOpener, error) { + if h.zeroRTTOpener != nil && time.Since(h.handshakeCompleteTime) > 3*h.rttStats.PTO(true) { + h.zeroRTTOpener = nil + h.logger.Debugf("Dropping 0-RTT keys.") + if h.tracer != nil && h.tracer.DroppedEncryptionLevel != nil { + h.tracer.DroppedEncryptionLevel(protocol.Encryption0RTT) + } + } + + if !h.has1RTTOpener { + return nil, ErrKeysNotYetAvailable + } + return h.aead, nil +} + +func (h *cryptoSetup) ConnectionState() ConnectionState { + return ConnectionState{ + ConnectionState: h.conn.ConnectionState(), + Used0RTT: h.used0RTT.Load(), + } +} + +func wrapError(err error) error { + // alert 80 is an internal error + if alertErr := tls.AlertError(0); errors.As(err, &alertErr) && alertErr != 80 { + return qerr.NewLocalCryptoError(uint8(alertErr), err) + } + return &qerr.TransportError{ErrorCode: qerr.InternalError, ErrorMessage: err.Error()} +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/handshake/header_protector.go b/backend/vendor/github.com/enetx/uquic/internal/handshake/header_protector.go new file mode 100644 index 0000000..e004015 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/handshake/header_protector.go @@ -0,0 +1,135 @@ +package handshake + +import ( + "crypto/aes" + "crypto/cipher" + "encoding/binary" + "fmt" + + tls "github.com/enetx/utls" + + "golang.org/x/crypto/chacha20" + + "github.com/enetx/uquic/internal/protocol" +) + +type headerProtector interface { + EncryptHeader(sample []byte, firstByte *byte, hdrBytes []byte) + DecryptHeader(sample []byte, firstByte *byte, hdrBytes []byte) +} + +func hkdfHeaderProtectionLabel(v protocol.Version) string { + if v == protocol.Version2 { + return "quicv2 hp" + } + return "quic hp" +} + +func newHeaderProtector(suite *cipherSuite, trafficSecret []byte, isLongHeader bool, v protocol.Version) headerProtector { + hkdfLabel := hkdfHeaderProtectionLabel(v) + switch suite.ID { + case tls.TLS_AES_128_GCM_SHA256, tls.TLS_AES_256_GCM_SHA384: + return newAESHeaderProtector(suite, trafficSecret, isLongHeader, hkdfLabel) + case tls.TLS_CHACHA20_POLY1305_SHA256: + return newChaChaHeaderProtector(suite, trafficSecret, isLongHeader, hkdfLabel) + default: + panic(fmt.Sprintf("Invalid cipher suite id: %d", suite.ID)) + } +} + +type aesHeaderProtector struct { + mask [16]byte // AES always has a 16 byte block size + block cipher.Block + isLongHeader bool +} + +var _ headerProtector = &aesHeaderProtector{} + +func newAESHeaderProtector(suite *cipherSuite, trafficSecret []byte, isLongHeader bool, hkdfLabel string) headerProtector { + hpKey := hkdfExpandLabel(suite.Hash, trafficSecret, []byte{}, hkdfLabel, suite.KeyLen) + block, err := aes.NewCipher(hpKey) + if err != nil { + panic(fmt.Sprintf("error creating new AES cipher: %s", err)) + } + return &aesHeaderProtector{ + block: block, + isLongHeader: isLongHeader, + } +} + +func (p *aesHeaderProtector) DecryptHeader(sample []byte, firstByte *byte, hdrBytes []byte) { + p.apply(sample, firstByte, hdrBytes) +} + +func (p *aesHeaderProtector) EncryptHeader(sample []byte, firstByte *byte, hdrBytes []byte) { + p.apply(sample, firstByte, hdrBytes) +} + +func (p *aesHeaderProtector) apply(sample []byte, firstByte *byte, hdrBytes []byte) { + if len(sample) != len(p.mask) { + panic("invalid sample size") + } + p.block.Encrypt(p.mask[:], sample) + if p.isLongHeader { + *firstByte ^= p.mask[0] & 0xf + } else { + *firstByte ^= p.mask[0] & 0x1f + } + for i := range hdrBytes { + hdrBytes[i] ^= p.mask[i+1] + } +} + +type chachaHeaderProtector struct { + mask [5]byte + + key [32]byte + isLongHeader bool +} + +var _ headerProtector = &chachaHeaderProtector{} + +func newChaChaHeaderProtector(suite *cipherSuite, trafficSecret []byte, isLongHeader bool, hkdfLabel string) headerProtector { + hpKey := hkdfExpandLabel(suite.Hash, trafficSecret, []byte{}, hkdfLabel, suite.KeyLen) + + p := &chachaHeaderProtector{ + isLongHeader: isLongHeader, + } + copy(p.key[:], hpKey) + return p +} + +func (p *chachaHeaderProtector) DecryptHeader(sample []byte, firstByte *byte, hdrBytes []byte) { + p.apply(sample, firstByte, hdrBytes) +} + +func (p *chachaHeaderProtector) EncryptHeader(sample []byte, firstByte *byte, hdrBytes []byte) { + p.apply(sample, firstByte, hdrBytes) +} + +func (p *chachaHeaderProtector) apply(sample []byte, firstByte *byte, hdrBytes []byte) { + if len(sample) != 16 { + panic("invalid sample size") + } + for i := 0; i < 5; i++ { + p.mask[i] = 0 + } + cipher, err := chacha20.NewUnauthenticatedCipher(p.key[:], sample[4:]) + if err != nil { + panic(err) + } + cipher.SetCounter(binary.LittleEndian.Uint32(sample[:4])) + cipher.XORKeyStream(p.mask[:], p.mask[:]) + p.applyMask(firstByte, hdrBytes) +} + +func (p *chachaHeaderProtector) applyMask(firstByte *byte, hdrBytes []byte) { + if p.isLongHeader { + *firstByte ^= p.mask[0] & 0xf + } else { + *firstByte ^= p.mask[0] & 0x1f + } + for i := range hdrBytes { + hdrBytes[i] ^= p.mask[i+1] + } +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/handshake/hkdf.go b/backend/vendor/github.com/enetx/uquic/internal/handshake/hkdf.go new file mode 100644 index 0000000..0caf1c8 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/handshake/hkdf.go @@ -0,0 +1,29 @@ +package handshake + +import ( + "crypto" + "encoding/binary" + + "golang.org/x/crypto/hkdf" +) + +// hkdfExpandLabel HKDF expands a label as defined in RFC 8446, section 7.1. +// Since this implementation avoids using a cryptobyte.Builder, it is about 15% faster than the +// hkdfExpandLabel in the standard library. +func hkdfExpandLabel(hash crypto.Hash, secret, context []byte, label string, length int) []byte { + b := make([]byte, 3, 3+6+len(label)+1+len(context)) + binary.BigEndian.PutUint16(b, uint16(length)) + b[2] = uint8(6 + len(label)) + b = append(b, []byte("tls13 ")...) + b = append(b, []byte(label)...) + b = b[:3+6+len(label)+1] + b[3+6+len(label)] = uint8(len(context)) + b = append(b, context...) + + out := make([]byte, length) + n, err := hkdf.Expand(hash.New, secret, b).Read(out) + if err != nil || n != length { + panic("quic: HKDF-Expand-Label invocation failed unexpectedly") + } + return out +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/handshake/initial_aead.go b/backend/vendor/github.com/enetx/uquic/internal/handshake/initial_aead.go new file mode 100644 index 0000000..9ca41d1 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/handshake/initial_aead.go @@ -0,0 +1,72 @@ +package handshake + +import ( + "crypto" + + tls "github.com/enetx/utls" + + "golang.org/x/crypto/hkdf" + + "github.com/enetx/uquic/internal/protocol" +) + +var ( + quicSaltV1 = []byte{0x38, 0x76, 0x2c, 0xf7, 0xf5, 0x59, 0x34, 0xb3, 0x4d, 0x17, 0x9a, 0xe6, 0xa4, 0xc8, 0x0c, 0xad, 0xcc, 0xbb, 0x7f, 0x0a} + quicSaltV2 = []byte{0x0d, 0xed, 0xe3, 0xde, 0xf7, 0x00, 0xa6, 0xdb, 0x81, 0x93, 0x81, 0xbe, 0x6e, 0x26, 0x9d, 0xcb, 0xf9, 0xbd, 0x2e, 0xd9} +) + +const ( + hkdfLabelKeyV1 = "quic key" + hkdfLabelKeyV2 = "quicv2 key" + hkdfLabelIVV1 = "quic iv" + hkdfLabelIVV2 = "quicv2 iv" +) + +func getSalt(v protocol.Version) []byte { + if v == protocol.Version2 { + return quicSaltV2 + } + return quicSaltV1 +} + +var initialSuite = getCipherSuite(tls.TLS_AES_128_GCM_SHA256) + +// NewInitialAEAD creates a new AEAD for Initial encryption / decryption. +func NewInitialAEAD(connID protocol.ConnectionID, pers protocol.Perspective, v protocol.Version) (LongHeaderSealer, LongHeaderOpener) { + clientSecret, serverSecret := computeSecrets(connID, v) + var mySecret, otherSecret []byte + if pers == protocol.PerspectiveClient { + mySecret = clientSecret + otherSecret = serverSecret + } else { + mySecret = serverSecret + otherSecret = clientSecret + } + myKey, myIV := computeInitialKeyAndIV(mySecret, v) + otherKey, otherIV := computeInitialKeyAndIV(otherSecret, v) + + encrypter := initialSuite.AEAD(myKey, myIV) + decrypter := initialSuite.AEAD(otherKey, otherIV) + + return newLongHeaderSealer(encrypter, newHeaderProtector(initialSuite, mySecret, true, v)), + newLongHeaderOpener(decrypter, newAESHeaderProtector(initialSuite, otherSecret, true, hkdfHeaderProtectionLabel(v))) +} + +func computeSecrets(connID protocol.ConnectionID, v protocol.Version) (clientSecret, serverSecret []byte) { + initialSecret := hkdf.Extract(crypto.SHA256.New, connID.Bytes(), getSalt(v)) + clientSecret = hkdfExpandLabel(crypto.SHA256, initialSecret, []byte{}, "client in", crypto.SHA256.Size()) + serverSecret = hkdfExpandLabel(crypto.SHA256, initialSecret, []byte{}, "server in", crypto.SHA256.Size()) + return +} + +func computeInitialKeyAndIV(secret []byte, v protocol.Version) (key, iv []byte) { + keyLabel := hkdfLabelKeyV1 + ivLabel := hkdfLabelIVV1 + if v == protocol.Version2 { + keyLabel = hkdfLabelKeyV2 + ivLabel = hkdfLabelIVV2 + } + key = hkdfExpandLabel(crypto.SHA256, secret, []byte{}, keyLabel, 16) + iv = hkdfExpandLabel(crypto.SHA256, secret, []byte{}, ivLabel, 12) + return +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/handshake/interface.go b/backend/vendor/github.com/enetx/uquic/internal/handshake/interface.go new file mode 100644 index 0000000..3a8cc97 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/handshake/interface.go @@ -0,0 +1,117 @@ +package handshake + +import ( + "errors" + "io" + "time" + + tls "github.com/enetx/utls" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/wire" +) + +var ( + // ErrKeysNotYetAvailable is returned when an opener or a sealer is requested for an encryption level, + // but the corresponding opener has not yet been initialized + // This can happen when packets arrive out of order. + ErrKeysNotYetAvailable = errors.New("CryptoSetup: keys at this encryption level not yet available") + // ErrKeysDropped is returned when an opener or a sealer is requested for an encryption level, + // but the corresponding keys have already been dropped. + ErrKeysDropped = errors.New("CryptoSetup: keys were already dropped") + // ErrDecryptionFailed is returned when the AEAD fails to open the packet. + ErrDecryptionFailed = errors.New("decryption failed") +) + +type headerDecryptor interface { + DecryptHeader(sample []byte, firstByte *byte, pnBytes []byte) +} + +// LongHeaderOpener opens a long header packet +type LongHeaderOpener interface { + headerDecryptor + DecodePacketNumber(wirePN protocol.PacketNumber, wirePNLen protocol.PacketNumberLen) protocol.PacketNumber + Open(dst, src []byte, pn protocol.PacketNumber, associatedData []byte) ([]byte, error) +} + +// ShortHeaderOpener opens a short header packet +type ShortHeaderOpener interface { + headerDecryptor + DecodePacketNumber(wirePN protocol.PacketNumber, wirePNLen protocol.PacketNumberLen) protocol.PacketNumber + Open(dst, src []byte, rcvTime time.Time, pn protocol.PacketNumber, kp protocol.KeyPhaseBit, associatedData []byte) ([]byte, error) +} + +// LongHeaderSealer seals a long header packet +type LongHeaderSealer interface { + Seal(dst, src []byte, packetNumber protocol.PacketNumber, associatedData []byte) []byte + EncryptHeader(sample []byte, firstByte *byte, pnBytes []byte) + Overhead() int +} + +// ShortHeaderSealer seals a short header packet +type ShortHeaderSealer interface { + LongHeaderSealer + KeyPhase() protocol.KeyPhaseBit +} + +type ConnectionState struct { + tls.ConnectionState + Used0RTT bool +} + +// EventKind is the kind of handshake event. +type EventKind uint8 + +const ( + // EventNoEvent signals that there are no new handshake events + EventNoEvent EventKind = iota + 1 + // EventWriteInitialData contains new CRYPTO data to send at the Initial encryption level + EventWriteInitialData + // EventWriteHandshakeData contains new CRYPTO data to send at the Handshake encryption level + EventWriteHandshakeData + // EventReceivedReadKeys signals that new decryption keys are available. + // It doesn't say which encryption level those keys are for. + EventReceivedReadKeys + // EventDiscard0RTTKeys signals that the Handshake keys were discarded. + EventDiscard0RTTKeys + // EventReceivedTransportParameters contains the transport parameters sent by the peer. + EventReceivedTransportParameters + // EventRestoredTransportParameters contains the transport parameters restored from the session ticket. + // It is only used for the client. + EventRestoredTransportParameters + // EventHandshakeComplete signals that the TLS handshake was completed. + EventHandshakeComplete +) + +// Event is a handshake event. +type Event struct { + Kind EventKind + Data []byte + TransportParameters *wire.TransportParameters +} + +// CryptoSetup handles the handshake and protecting / unprotecting packets +type CryptoSetup interface { + StartHandshake() error + io.Closer + ChangeConnectionID(protocol.ConnectionID) + GetSessionTicket() ([]byte, error) + + HandleMessage([]byte, protocol.EncryptionLevel) error + NextEvent() Event + + SetLargest1RTTAcked(protocol.PacketNumber) error + DiscardInitialKeys() + SetHandshakeConfirmed() + ConnectionState() ConnectionState + + GetInitialOpener() (LongHeaderOpener, error) + GetHandshakeOpener() (LongHeaderOpener, error) + Get0RTTOpener() (LongHeaderOpener, error) + Get1RTTOpener() (ShortHeaderOpener, error) + + GetInitialSealer() (LongHeaderSealer, error) + GetHandshakeSealer() (LongHeaderSealer, error) + Get0RTTSealer() (LongHeaderSealer, error) + Get1RTTSealer() (ShortHeaderSealer, error) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/handshake/retry.go b/backend/vendor/github.com/enetx/uquic/internal/handshake/retry.go new file mode 100644 index 0000000..774b6d1 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/handshake/retry.go @@ -0,0 +1,63 @@ +package handshake + +import ( + "bytes" + "crypto/aes" + "crypto/cipher" + "fmt" + "sync" + + "github.com/enetx/uquic/internal/protocol" +) + +var ( + retryAEADv1 cipher.AEAD // used for QUIC v1 (RFC 9000) + retryAEADv2 cipher.AEAD // used for QUIC v2 (RFC 9369) +) + +func init() { + retryAEADv1 = initAEAD([16]byte{0xbe, 0x0c, 0x69, 0x0b, 0x9f, 0x66, 0x57, 0x5a, 0x1d, 0x76, 0x6b, 0x54, 0xe3, 0x68, 0xc8, 0x4e}) + retryAEADv2 = initAEAD([16]byte{0x8f, 0xb4, 0xb0, 0x1b, 0x56, 0xac, 0x48, 0xe2, 0x60, 0xfb, 0xcb, 0xce, 0xad, 0x7c, 0xcc, 0x92}) +} + +func initAEAD(key [16]byte) cipher.AEAD { + aes, err := aes.NewCipher(key[:]) + if err != nil { + panic(err) + } + aead, err := cipher.NewGCM(aes) + if err != nil { + panic(err) + } + return aead +} + +var ( + retryBuf bytes.Buffer + retryMutex sync.Mutex + retryNonceV1 = [12]byte{0x46, 0x15, 0x99, 0xd3, 0x5d, 0x63, 0x2b, 0xf2, 0x23, 0x98, 0x25, 0xbb} + retryNonceV2 = [12]byte{0xd8, 0x69, 0x69, 0xbc, 0x2d, 0x7c, 0x6d, 0x99, 0x90, 0xef, 0xb0, 0x4a} +) + +// GetRetryIntegrityTag calculates the integrity tag on a Retry packet +func GetRetryIntegrityTag(retry []byte, origDestConnID protocol.ConnectionID, version protocol.Version) *[16]byte { + retryMutex.Lock() + defer retryMutex.Unlock() + + retryBuf.WriteByte(uint8(origDestConnID.Len())) + retryBuf.Write(origDestConnID.Bytes()) + retryBuf.Write(retry) + defer retryBuf.Reset() + + var tag [16]byte + var sealed []byte + if version == protocol.Version2 { + sealed = retryAEADv2.Seal(tag[:0], retryNonceV2[:], nil, retryBuf.Bytes()) + } else { + sealed = retryAEADv1.Seal(tag[:0], retryNonceV1[:], nil, retryBuf.Bytes()) + } + if len(sealed) != 16 { + panic(fmt.Sprintf("unexpected Retry integrity tag length: %d", len(sealed))) + } + return &tag +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/handshake/session_ticket.go b/backend/vendor/github.com/enetx/uquic/internal/handshake/session_ticket.go new file mode 100644 index 0000000..fa64d46 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/handshake/session_ticket.go @@ -0,0 +1,54 @@ +package handshake + +import ( + "bytes" + "errors" + "fmt" + "time" + + "github.com/enetx/uquic/internal/wire" + "github.com/enetx/uquic/quicvarint" +) + +const sessionTicketRevision = 4 + +type sessionTicket struct { + Parameters *wire.TransportParameters + RTT time.Duration // to be encoded in mus +} + +func (t *sessionTicket) Marshal() []byte { + b := make([]byte, 0, 256) + b = quicvarint.Append(b, sessionTicketRevision) + b = quicvarint.Append(b, uint64(t.RTT.Microseconds())) + if t.Parameters == nil { + return b + } + return t.Parameters.MarshalForSessionTicket(b) +} + +func (t *sessionTicket) Unmarshal(b []byte, using0RTT bool) error { + r := bytes.NewReader(b) + rev, err := quicvarint.Read(r) + if err != nil { + return errors.New("failed to read session ticket revision") + } + if rev != sessionTicketRevision { + return fmt.Errorf("unknown session ticket revision: %d", rev) + } + rtt, err := quicvarint.Read(r) + if err != nil { + return errors.New("failed to read RTT") + } + if using0RTT { + var tp wire.TransportParameters + if err := tp.UnmarshalFromSessionTicket(r); err != nil { + return fmt.Errorf("unmarshaling transport parameters from session ticket failed: %s", err.Error()) + } + t.Parameters = &tp + } else if r.Len() > 0 { + return fmt.Errorf("the session ticket has more bytes than expected") + } + t.RTT = time.Duration(rtt) * time.Microsecond + return nil +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/handshake/token_generator.go b/backend/vendor/github.com/enetx/uquic/internal/handshake/token_generator.go new file mode 100644 index 0000000..e4ae59c --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/handshake/token_generator.go @@ -0,0 +1,120 @@ +package handshake + +import ( + "bytes" + "encoding/asn1" + "fmt" + "net" + "time" + + "github.com/enetx/uquic/internal/protocol" +) + +const ( + tokenPrefixIP byte = iota + tokenPrefixString +) + +// A Token is derived from the client address and can be used to verify the ownership of this address. +type Token struct { + IsRetryToken bool + SentTime time.Time + encodedRemoteAddr []byte + // only set for retry tokens + OriginalDestConnectionID protocol.ConnectionID + RetrySrcConnectionID protocol.ConnectionID +} + +// ValidateRemoteAddr validates the address, but does not check expiration +func (t *Token) ValidateRemoteAddr(addr net.Addr) bool { + return bytes.Equal(encodeRemoteAddr(addr), t.encodedRemoteAddr) +} + +// token is the struct that is used for ASN1 serialization and deserialization +type token struct { + IsRetryToken bool + RemoteAddr []byte + Timestamp int64 + OriginalDestConnectionID []byte + RetrySrcConnectionID []byte +} + +// A TokenGenerator generates tokens +type TokenGenerator struct { + tokenProtector tokenProtector +} + +// NewTokenGenerator initializes a new TokenGenerator +func NewTokenGenerator(key TokenProtectorKey) *TokenGenerator { + return &TokenGenerator{tokenProtector: newTokenProtector(key)} +} + +// NewRetryToken generates a new token for a Retry for a given source address +func (g *TokenGenerator) NewRetryToken( + raddr net.Addr, + origDestConnID protocol.ConnectionID, + retrySrcConnID protocol.ConnectionID, +) ([]byte, error) { + data, err := asn1.Marshal(token{ + IsRetryToken: true, + RemoteAddr: encodeRemoteAddr(raddr), + OriginalDestConnectionID: origDestConnID.Bytes(), + RetrySrcConnectionID: retrySrcConnID.Bytes(), + Timestamp: time.Now().UnixNano(), + }) + if err != nil { + return nil, err + } + return g.tokenProtector.NewToken(data) +} + +// NewToken generates a new token to be sent in a NEW_TOKEN frame +func (g *TokenGenerator) NewToken(raddr net.Addr) ([]byte, error) { + data, err := asn1.Marshal(token{ + RemoteAddr: encodeRemoteAddr(raddr), + Timestamp: time.Now().UnixNano(), + }) + if err != nil { + return nil, err + } + return g.tokenProtector.NewToken(data) +} + +// DecodeToken decodes a token +func (g *TokenGenerator) DecodeToken(encrypted []byte) (*Token, error) { + // if the client didn't send any token, DecodeToken will be called with a nil-slice + if len(encrypted) == 0 { + return nil, nil + } + + data, err := g.tokenProtector.DecodeToken(encrypted) + if err != nil { + return nil, err + } + t := &token{} + rest, err := asn1.Unmarshal(data, t) + if err != nil { + return nil, err + } + if len(rest) != 0 { + return nil, fmt.Errorf("rest when unpacking token: %d", len(rest)) + } + token := &Token{ + IsRetryToken: t.IsRetryToken, + SentTime: time.Unix(0, t.Timestamp), + encodedRemoteAddr: t.RemoteAddr, + } + if t.IsRetryToken { + token.OriginalDestConnectionID = protocol.ParseConnectionID(t.OriginalDestConnectionID) + token.RetrySrcConnectionID = protocol.ParseConnectionID(t.RetrySrcConnectionID) + } + return token, nil +} + +// encodeRemoteAddr encodes a remote address such that it can be saved in the token +func encodeRemoteAddr(remoteAddr net.Addr) []byte { + if udpAddr, ok := remoteAddr.(*net.UDPAddr); ok { + return append([]byte{tokenPrefixIP}, udpAddr.IP...) + } + return append([]byte{tokenPrefixString}, []byte(remoteAddr.String())...) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/handshake/token_protector.go b/backend/vendor/github.com/enetx/uquic/internal/handshake/token_protector.go new file mode 100644 index 0000000..f3a99e4 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/handshake/token_protector.go @@ -0,0 +1,82 @@ +package handshake + +import ( + "crypto/aes" + "crypto/cipher" + "crypto/rand" + "crypto/sha256" + "fmt" + "io" + + "golang.org/x/crypto/hkdf" +) + +// TokenProtectorKey is the key used to encrypt both Retry and session resumption tokens. +type TokenProtectorKey [32]byte + +// TokenProtector is used to create and verify a token +type tokenProtector interface { + // NewToken creates a new token + NewToken([]byte) ([]byte, error) + // DecodeToken decodes a token + DecodeToken([]byte) ([]byte, error) +} + +const tokenNonceSize = 32 + +// tokenProtector is used to create and verify a token +type tokenProtectorImpl struct { + key TokenProtectorKey +} + +// newTokenProtector creates a source for source address tokens +func newTokenProtector(key TokenProtectorKey) tokenProtector { + return &tokenProtectorImpl{key: key} +} + +// NewToken encodes data into a new token. +func (s *tokenProtectorImpl) NewToken(data []byte) ([]byte, error) { + var nonce [tokenNonceSize]byte + if _, err := rand.Read(nonce[:]); err != nil { + return nil, err + } + aead, aeadNonce, err := s.createAEAD(nonce[:]) + if err != nil { + return nil, err + } + return append(nonce[:], aead.Seal(nil, aeadNonce, data, nil)...), nil +} + +// DecodeToken decodes a token. +func (s *tokenProtectorImpl) DecodeToken(p []byte) ([]byte, error) { + if len(p) < tokenNonceSize { + return nil, fmt.Errorf("token too short: %d", len(p)) + } + nonce := p[:tokenNonceSize] + aead, aeadNonce, err := s.createAEAD(nonce) + if err != nil { + return nil, err + } + return aead.Open(nil, aeadNonce, p[tokenNonceSize:], nil) +} + +func (s *tokenProtectorImpl) createAEAD(nonce []byte) (cipher.AEAD, []byte, error) { + h := hkdf.New(sha256.New, s.key[:], nonce, []byte("quic-go token source")) + key := make([]byte, 32) // use a 32 byte key, in order to select AES-256 + if _, err := io.ReadFull(h, key); err != nil { + return nil, nil, err + } + aeadNonce := make([]byte, 12) + if _, err := io.ReadFull(h, aeadNonce); err != nil { + return nil, nil, err + } + c, err := aes.NewCipher(key) + if err != nil { + return nil, nil, err + } + aead, err := cipher.NewGCM(c) + if err != nil { + return nil, nil, err + } + return aead, aeadNonce, nil +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/handshake/u_crypto_setup.go b/backend/vendor/github.com/enetx/uquic/internal/handshake/u_crypto_setup.go new file mode 100644 index 0000000..e2efb5d --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/handshake/u_crypto_setup.go @@ -0,0 +1,530 @@ +package handshake + +import ( + "context" + "fmt" + "strings" + "sync/atomic" + "time" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qtls" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/internal/wire" + "github.com/enetx/uquic/logging" + "github.com/enetx/uquic/quicvarint" + tls "github.com/enetx/utls" +) + +type uCryptoSetup struct { + tlsConf *tls.Config + conn *tls.UQUICConn + + events []Event + + version protocol.Version + + ourParams *wire.TransportParameters + peerParams *wire.TransportParameters + + zeroRTTParameters *wire.TransportParameters + allow0RTT bool + + rttStats *utils.RTTStats + + tracer *logging.ConnectionTracer + logger utils.Logger + + perspective protocol.Perspective + + handshakeCompleteTime time.Time + + zeroRTTOpener LongHeaderOpener // only set for the server + zeroRTTSealer LongHeaderSealer // only set for the client + + initialOpener LongHeaderOpener + initialSealer LongHeaderSealer + + handshakeOpener LongHeaderOpener + handshakeSealer LongHeaderSealer + + used0RTT atomic.Bool + + aead *updatableAEAD + has1RTTSealer bool + has1RTTOpener bool +} + +var _ CryptoSetup = &uCryptoSetup{} + +// [UQUIC] +// NewUCryptoSetupClient creates a new crypto setup for the client with UTLS +func NewUCryptoSetupClient( + connID protocol.ConnectionID, + tp *wire.TransportParameters, + tlsConf *tls.Config, + enable0RTT bool, + rttStats *utils.RTTStats, + tracer *logging.ConnectionTracer, + logger utils.Logger, + version protocol.Version, + chs *tls.ClientHelloSpec, +) CryptoSetup { + cs := newUCryptoSetup( + connID, + tp, + rttStats, + tracer, + logger, + protocol.PerspectiveClient, + version, + ) + + tlsConf = tlsConf.Clone() + tlsConf.MinVersion = tls.VersionTLS13 + quicConf := &tls.QUICConfig{TLSConfig: tlsConf} + qtls.SetupConfigForClient(quicConf, cs.marshalDataForSessionState, cs.handleDataFromSessionState) + cs.tlsConf = tlsConf + + // [UQUIC] + cs.conn = tls.UQUICClient(quicConf, tls.HelloCustom) + if err := cs.conn.ApplyPreset(chs); err != nil { + panic(err) + } + + // cs.conn.SetTransportParameters(cs.ourParams.Marshal(protocol.PerspectiveClient)) // [UQUIC] doesn't require this + + return cs +} + +func newUCryptoSetup( + connID protocol.ConnectionID, + tp *wire.TransportParameters, + rttStats *utils.RTTStats, + tracer *logging.ConnectionTracer, + logger utils.Logger, + perspective protocol.Perspective, + version protocol.Version, +) *uCryptoSetup { + initialSealer, initialOpener := NewInitialAEAD(connID, perspective, version) + if tracer != nil { + tracer.UpdatedKeyFromTLS(protocol.EncryptionInitial, protocol.PerspectiveClient) + tracer.UpdatedKeyFromTLS(protocol.EncryptionInitial, protocol.PerspectiveServer) + } + return &uCryptoSetup{ + initialSealer: initialSealer, + initialOpener: initialOpener, + aead: newUpdatableAEAD(rttStats, tracer, logger, version), + events: make([]Event, 0, 16), + ourParams: tp, + rttStats: rttStats, + tracer: tracer, + logger: logger, + perspective: perspective, + version: version, + } +} + +func (h *uCryptoSetup) ChangeConnectionID(id protocol.ConnectionID) { + initialSealer, initialOpener := NewInitialAEAD(id, h.perspective, h.version) + h.initialSealer = initialSealer + h.initialOpener = initialOpener + if h.tracer != nil { + h.tracer.UpdatedKeyFromTLS(protocol.EncryptionInitial, protocol.PerspectiveClient) + h.tracer.UpdatedKeyFromTLS(protocol.EncryptionInitial, protocol.PerspectiveServer) + } +} + +func (h *uCryptoSetup) SetLargest1RTTAcked(pn protocol.PacketNumber) error { + return h.aead.SetLargestAcked(pn) +} + +func (h *uCryptoSetup) StartHandshake() error { + err := h.conn.Start(context.WithValue(context.Background(), QUICVersionContextKey, h.version)) + if err != nil { + return wrapError(err) + } + for { + ev := h.conn.NextEvent() + done, err := h.handleEvent(ev) + if err != nil { + return wrapError(err) + } + if done { + break + } + } + if h.perspective == protocol.PerspectiveClient { + if h.zeroRTTSealer != nil && h.zeroRTTParameters != nil { + h.logger.Debugf("Doing 0-RTT.") + h.events = append(h.events, Event{Kind: EventRestoredTransportParameters, TransportParameters: h.zeroRTTParameters}) + } else { + h.logger.Debugf("Not doing 0-RTT. Has sealer: %t, has params: %t", h.zeroRTTSealer != nil, h.zeroRTTParameters != nil) + } + } + return nil +} + +// Close closes the crypto setup. +// It aborts the handshake, if it is still running. +func (h *uCryptoSetup) Close() error { + return h.conn.Close() +} + +// HandleMessage handles a TLS handshake message. +// It is called by the crypto streams when a new message is available. +func (h *uCryptoSetup) HandleMessage(data []byte, encLevel protocol.EncryptionLevel) error { + if err := h.handleMessage(data, encLevel); err != nil { + return wrapError(err) + } + return nil +} + +func (h *uCryptoSetup) handleMessage(data []byte, encLevel protocol.EncryptionLevel) error { + if err := h.conn.HandleData(qtls.ToTLSEncryptionLevel(encLevel), data); err != nil { + return err + } + for { + ev := h.conn.NextEvent() + done, err := h.handleEvent(ev) + if err != nil { + return err + } + if done { + return nil + } + } +} + +func (h *uCryptoSetup) handleEvent(ev tls.QUICEvent) (done bool, err error) { + switch ev.Kind { + case tls.QUICNoEvent: + return true, nil + case tls.QUICSetReadSecret: + h.setReadKey(ev.Level, ev.Suite, ev.Data) + return false, nil + case tls.QUICSetWriteSecret: + h.setWriteKey(ev.Level, ev.Suite, ev.Data) + return false, nil + case tls.QUICTransportParameters: + return false, h.handleTransportParameters(ev.Data) + case tls.QUICTransportParametersRequired: + h.conn.SetTransportParameters(h.ourParams.Marshal(h.perspective)) + // [UQUIC] doesn't expect this and may fail + return false, nil + case tls.QUICRejectedEarlyData: + h.rejected0RTT() + return false, nil + case tls.QUICWriteData: + h.writeRecord(ev.Level, ev.Data) + return false, nil + case tls.QUICHandshakeDone: + h.handshakeComplete() + return false, nil + default: + return false, fmt.Errorf("unexpected event: %d", ev.Kind) + } +} + +func (h *uCryptoSetup) NextEvent() Event { + if len(h.events) == 0 { + return Event{Kind: EventNoEvent} + } + ev := h.events[0] + h.events = h.events[1:] + return ev +} + +func (h *uCryptoSetup) handleTransportParameters(data []byte) error { + var tp wire.TransportParameters + if err := tp.Unmarshal(data, h.perspective.Opposite()); err != nil { + return err + } + h.peerParams = &tp + h.events = append(h.events, Event{Kind: EventReceivedTransportParameters, TransportParameters: h.peerParams}) + return nil +} + +// must be called after receiving the transport parameters +func (h *uCryptoSetup) marshalDataForSessionState(earlyData bool) []byte { + b := make([]byte, 0, 256) + b = quicvarint.Append(b, clientSessionStateRevision) + b = quicvarint.Append(b, uint64(h.rttStats.SmoothedRTT().Microseconds())) + if earlyData { + // only save the transport parameters for 0-RTT enabled session tickets + return h.peerParams.MarshalForSessionTicket(b) + } + return b +} + +func (h *uCryptoSetup) handleDataFromSessionState(data []byte, earlyData bool) (allowEarlyData bool) { + rtt, tp, err := decodeDataFromSessionState(data, earlyData) + if err != nil { + h.logger.Debugf("Restoring of transport parameters from session ticket failed: %s", err.Error()) + return + } + h.rttStats.SetInitialRTT(rtt) + // The session ticket might have been saved from a connection that allowed 0-RTT, + // and therefore contain transport parameters. + // Only use them if 0-RTT is actually used on the new connection. + if tp != nil && h.allow0RTT { + h.zeroRTTParameters = tp + return true + } + return false +} + +// GetSessionTicket generates a new session ticket. +// Due to limitations in crypto/tls, it's only possible to generate a single session ticket per connection. +// It is only valid for the server. +func (h *uCryptoSetup) GetSessionTicket() ([]byte, error) { + if err := h.conn.SendSessionTicket(tls.QUICSessionTicketOptions{ + EarlyData: h.allow0RTT, + }); err != nil { + // Session tickets might be disabled by tls.Config.SessionTicketsDisabled. + // We can't check h.tlsConfig here, since the actual config might have been obtained from + // the GetConfigForClient callback. + // See https://github.com/golang/go/issues/62032. + // Once that issue is resolved, this error assertion can be removed. + if strings.Contains(err.Error(), "session ticket keys unavailable") { + return nil, nil + } + return nil, err + } + ev := h.conn.NextEvent() + if ev.Kind != tls.QUICWriteData || ev.Level != tls.QUICEncryptionLevelApplication { + panic("crypto/tls bug: where's my session ticket?") + } + ticket := ev.Data + if ev := h.conn.NextEvent(); ev.Kind != tls.QUICNoEvent { + panic("crypto/tls bug: why more than one ticket?") + } + return ticket, nil +} + +// rejected0RTT is called for the client when the server rejects 0-RTT. +func (h *uCryptoSetup) rejected0RTT() { + h.logger.Debugf("0-RTT was rejected. Dropping 0-RTT keys.") + + had0RTTKeys := h.zeroRTTSealer != nil + h.zeroRTTSealer = nil + + if had0RTTKeys { + h.events = append(h.events, Event{Kind: EventDiscard0RTTKeys}) + } +} + +func (h *uCryptoSetup) setReadKey(el tls.QUICEncryptionLevel, suiteID uint16, trafficSecret []byte) { + suite := getCipherSuite(suiteID) + //nolint:exhaustive // The TLS stack doesn't export Initial keys. + switch el { + case tls.QUICEncryptionLevelEarly: + if h.perspective == protocol.PerspectiveClient { + panic("Received 0-RTT read key for the client") + } + h.zeroRTTOpener = newLongHeaderOpener( + createAEAD(suite, trafficSecret, h.version), + newHeaderProtector(suite, trafficSecret, true, h.version), + ) + h.used0RTT.Store(true) + if h.logger.Debug() { + h.logger.Debugf("Installed 0-RTT Read keys (using %s)", tls.CipherSuiteName(suite.ID)) + } + case tls.QUICEncryptionLevelHandshake: + h.handshakeOpener = newLongHeaderOpener( + createAEAD(suite, trafficSecret, h.version), + newHeaderProtector(suite, trafficSecret, true, h.version), + ) + if h.logger.Debug() { + h.logger.Debugf("Installed Handshake Read keys (using %s)", tls.CipherSuiteName(suite.ID)) + } + case tls.QUICEncryptionLevelApplication: + h.aead.SetReadKey(suite, trafficSecret) + h.has1RTTOpener = true + if h.logger.Debug() { + h.logger.Debugf("Installed 1-RTT Read keys (using %s)", tls.CipherSuiteName(suite.ID)) + } + default: + panic("unexpected read encryption level") + } + h.events = append(h.events, Event{Kind: EventReceivedReadKeys}) + if h.tracer != nil && h.tracer.UpdatedKeyFromTLS != nil { + h.tracer.UpdatedKeyFromTLS(qtls.FromTLSEncryptionLevel(el), h.perspective.Opposite()) + } +} + +func (h *uCryptoSetup) setWriteKey(el tls.QUICEncryptionLevel, suiteID uint16, trafficSecret []byte) { + suite := getCipherSuite(suiteID) + //nolint:exhaustive // The TLS stack doesn't export Initial keys. + switch el { + case tls.QUICEncryptionLevelEarly: + if h.perspective == protocol.PerspectiveServer { + panic("Received 0-RTT write key for the server") + } + h.zeroRTTSealer = newLongHeaderSealer( + createAEAD(suite, trafficSecret, h.version), + newHeaderProtector(suite, trafficSecret, true, h.version), + ) + if h.logger.Debug() { + h.logger.Debugf("Installed 0-RTT Write keys (using %s)", tls.CipherSuiteName(suite.ID)) + } + if h.tracer != nil && h.tracer.UpdatedKeyFromTLS != nil { + h.tracer.UpdatedKeyFromTLS(protocol.Encryption0RTT, h.perspective) + } + // don't set used0RTT here. 0-RTT might still get rejected. + return + case tls.QUICEncryptionLevelHandshake: + h.handshakeSealer = newLongHeaderSealer( + createAEAD(suite, trafficSecret, h.version), + newHeaderProtector(suite, trafficSecret, true, h.version), + ) + if h.logger.Debug() { + h.logger.Debugf("Installed Handshake Write keys (using %s)", tls.CipherSuiteName(suite.ID)) + } + case tls.QUICEncryptionLevelApplication: + h.aead.SetWriteKey(suite, trafficSecret) + h.has1RTTSealer = true + if h.logger.Debug() { + h.logger.Debugf("Installed 1-RTT Write keys (using %s)", tls.CipherSuiteName(suite.ID)) + } + if h.zeroRTTSealer != nil { + // Once we receive handshake keys, we know that 0-RTT was not rejected. + h.used0RTT.Store(true) + h.zeroRTTSealer = nil + h.logger.Debugf("Dropping 0-RTT keys.") + if h.tracer != nil && h.tracer.DroppedEncryptionLevel != nil { + h.tracer.DroppedEncryptionLevel(protocol.Encryption0RTT) + } + } + default: + panic("unexpected write encryption level") + } + if h.tracer != nil && h.tracer.UpdatedKeyFromTLS != nil { + h.tracer.UpdatedKeyFromTLS(qtls.FromTLSEncryptionLevel(el), h.perspective) + } +} + +// writeRecord is called when TLS writes data +func (h *uCryptoSetup) writeRecord(encLevel tls.QUICEncryptionLevel, p []byte) { + //nolint:exhaustive // handshake records can only be written for Initial and Handshake. + switch encLevel { + case tls.QUICEncryptionLevelInitial: + h.events = append(h.events, Event{Kind: EventWriteInitialData, Data: p}) + case tls.QUICEncryptionLevelHandshake: + h.events = append(h.events, Event{Kind: EventWriteHandshakeData, Data: p}) + case tls.QUICEncryptionLevelApplication: + panic("unexpected write") + default: + panic(fmt.Sprintf("unexpected write encryption level: %s", encLevel)) + } +} + +func (h *uCryptoSetup) DiscardInitialKeys() { + dropped := h.initialOpener != nil + h.initialOpener = nil + h.initialSealer = nil + if dropped { + h.logger.Debugf("Dropping Initial keys.") + } +} + +func (h *uCryptoSetup) handshakeComplete() { + h.handshakeCompleteTime = time.Now() + h.events = append(h.events, Event{Kind: EventHandshakeComplete}) +} + +func (h *uCryptoSetup) SetHandshakeConfirmed() { + h.aead.SetHandshakeConfirmed() + // drop Handshake keys + var dropped bool + if h.handshakeOpener != nil { + h.handshakeOpener = nil + h.handshakeSealer = nil + dropped = true + } + if dropped { + h.logger.Debugf("Dropping Handshake keys.") + } +} + +func (h *uCryptoSetup) GetInitialSealer() (LongHeaderSealer, error) { + if h.initialSealer == nil { + return nil, ErrKeysDropped + } + return h.initialSealer, nil +} + +func (h *uCryptoSetup) Get0RTTSealer() (LongHeaderSealer, error) { + if h.zeroRTTSealer == nil { + return nil, ErrKeysDropped + } + return h.zeroRTTSealer, nil +} + +func (h *uCryptoSetup) GetHandshakeSealer() (LongHeaderSealer, error) { + if h.handshakeSealer == nil { + if h.initialSealer == nil { + return nil, ErrKeysDropped + } + return nil, ErrKeysNotYetAvailable + } + return h.handshakeSealer, nil +} + +func (h *uCryptoSetup) Get1RTTSealer() (ShortHeaderSealer, error) { + if !h.has1RTTSealer { + return nil, ErrKeysNotYetAvailable + } + return h.aead, nil +} + +func (h *uCryptoSetup) GetInitialOpener() (LongHeaderOpener, error) { + if h.initialOpener == nil { + return nil, ErrKeysDropped + } + return h.initialOpener, nil +} + +func (h *uCryptoSetup) Get0RTTOpener() (LongHeaderOpener, error) { + if h.zeroRTTOpener == nil { + if h.initialOpener != nil { + return nil, ErrKeysNotYetAvailable + } + // if the initial opener is also not available, the keys were already dropped + return nil, ErrKeysDropped + } + return h.zeroRTTOpener, nil +} + +func (h *uCryptoSetup) GetHandshakeOpener() (LongHeaderOpener, error) { + if h.handshakeOpener == nil { + if h.initialOpener != nil { + return nil, ErrKeysNotYetAvailable + } + // if the initial opener is also not available, the keys were already dropped + return nil, ErrKeysDropped + } + return h.handshakeOpener, nil +} + +func (h *uCryptoSetup) Get1RTTOpener() (ShortHeaderOpener, error) { + if h.zeroRTTOpener != nil && time.Since(h.handshakeCompleteTime) > 3*h.rttStats.PTO(true) { + h.zeroRTTOpener = nil + h.logger.Debugf("Dropping 0-RTT keys.") + if h.tracer != nil { + h.tracer.DroppedEncryptionLevel(protocol.Encryption0RTT) + } + } + + if !h.has1RTTOpener { + return nil, ErrKeysNotYetAvailable + } + return h.aead, nil +} + +func (h *uCryptoSetup) ConnectionState() ConnectionState { + return ConnectionState{ + ConnectionState: h.conn.ConnectionState(), + Used0RTT: h.used0RTT.Load(), + } +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/handshake/updatable_aead.go b/backend/vendor/github.com/enetx/uquic/internal/handshake/updatable_aead.go new file mode 100644 index 0000000..a11bf2b --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/handshake/updatable_aead.go @@ -0,0 +1,333 @@ +package handshake + +import ( + "crypto" + "crypto/cipher" + "encoding/binary" + "fmt" + "time" + + tls "github.com/enetx/utls" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/logging" +) + +// KeyUpdateInterval is the maximum number of packets we send or receive before initiating a key update. +// It's a package-level variable to allow modifying it for testing purposes. +var KeyUpdateInterval uint64 = protocol.KeyUpdateInterval + +// FirstKeyUpdateInterval is the maximum number of packets we send or receive before initiating the first key update. +// It's a package-level variable to allow modifying it for testing purposes. +var FirstKeyUpdateInterval uint64 = 100 + +type updatableAEAD struct { + suite *cipherSuite + + keyPhase protocol.KeyPhase + largestAcked protocol.PacketNumber + firstPacketNumber protocol.PacketNumber + handshakeConfirmed bool + + invalidPacketLimit uint64 + invalidPacketCount uint64 + + // Time when the keys should be dropped. Keys are dropped on the next call to Open(). + prevRcvAEADExpiry time.Time + prevRcvAEAD cipher.AEAD + + firstRcvdWithCurrentKey protocol.PacketNumber + firstSentWithCurrentKey protocol.PacketNumber + highestRcvdPN protocol.PacketNumber // highest packet number received (which could be successfully unprotected) + numRcvdWithCurrentKey uint64 + numSentWithCurrentKey uint64 + rcvAEAD cipher.AEAD + sendAEAD cipher.AEAD + // caches cipher.AEAD.Overhead(). This speeds up calls to Overhead(). + aeadOverhead int + + nextRcvAEAD cipher.AEAD + nextSendAEAD cipher.AEAD + nextRcvTrafficSecret []byte + nextSendTrafficSecret []byte + + headerDecrypter headerProtector + headerEncrypter headerProtector + + rttStats *utils.RTTStats + + tracer *logging.ConnectionTracer + logger utils.Logger + version protocol.Version + + // use a single slice to avoid allocations + nonceBuf []byte +} + +var ( + _ ShortHeaderOpener = &updatableAEAD{} + _ ShortHeaderSealer = &updatableAEAD{} +) + +func newUpdatableAEAD(rttStats *utils.RTTStats, tracer *logging.ConnectionTracer, logger utils.Logger, version protocol.Version) *updatableAEAD { + return &updatableAEAD{ + firstPacketNumber: protocol.InvalidPacketNumber, + largestAcked: protocol.InvalidPacketNumber, + firstRcvdWithCurrentKey: protocol.InvalidPacketNumber, + firstSentWithCurrentKey: protocol.InvalidPacketNumber, + rttStats: rttStats, + tracer: tracer, + logger: logger, + version: version, + } +} + +func (a *updatableAEAD) rollKeys() { + if a.prevRcvAEAD != nil { + a.logger.Debugf("Dropping key phase %d ahead of scheduled time. Drop time was: %s", a.keyPhase-1, a.prevRcvAEADExpiry) + if a.tracer != nil && a.tracer.DroppedKey != nil { + a.tracer.DroppedKey(a.keyPhase - 1) + } + a.prevRcvAEADExpiry = time.Time{} + } + + a.keyPhase++ + a.firstRcvdWithCurrentKey = protocol.InvalidPacketNumber + a.firstSentWithCurrentKey = protocol.InvalidPacketNumber + a.numRcvdWithCurrentKey = 0 + a.numSentWithCurrentKey = 0 + a.prevRcvAEAD = a.rcvAEAD + a.rcvAEAD = a.nextRcvAEAD + a.sendAEAD = a.nextSendAEAD + + a.nextRcvTrafficSecret = a.getNextTrafficSecret(a.suite.Hash, a.nextRcvTrafficSecret) + a.nextSendTrafficSecret = a.getNextTrafficSecret(a.suite.Hash, a.nextSendTrafficSecret) + a.nextRcvAEAD = createAEAD(a.suite, a.nextRcvTrafficSecret, a.version) + a.nextSendAEAD = createAEAD(a.suite, a.nextSendTrafficSecret, a.version) +} + +func (a *updatableAEAD) startKeyDropTimer(now time.Time) { + d := 3 * a.rttStats.PTO(true) + a.logger.Debugf("Starting key drop timer to drop key phase %d (in %s)", a.keyPhase-1, d) + a.prevRcvAEADExpiry = now.Add(d) +} + +func (a *updatableAEAD) getNextTrafficSecret(hash crypto.Hash, ts []byte) []byte { + return hkdfExpandLabel(hash, ts, []byte{}, "quic ku", hash.Size()) +} + +// SetReadKey sets the read key. +// For the client, this function is called before SetWriteKey. +// For the server, this function is called after SetWriteKey. +func (a *updatableAEAD) SetReadKey(suite *cipherSuite, trafficSecret []byte) { + a.rcvAEAD = createAEAD(suite, trafficSecret, a.version) + a.headerDecrypter = newHeaderProtector(suite, trafficSecret, false, a.version) + if a.suite == nil { + a.setAEADParameters(a.rcvAEAD, suite) + } + + a.nextRcvTrafficSecret = a.getNextTrafficSecret(suite.Hash, trafficSecret) + a.nextRcvAEAD = createAEAD(suite, a.nextRcvTrafficSecret, a.version) +} + +// SetWriteKey sets the write key. +// For the client, this function is called after SetReadKey. +// For the server, this function is called before SetReadKey. +func (a *updatableAEAD) SetWriteKey(suite *cipherSuite, trafficSecret []byte) { + a.sendAEAD = createAEAD(suite, trafficSecret, a.version) + a.headerEncrypter = newHeaderProtector(suite, trafficSecret, false, a.version) + if a.suite == nil { + a.setAEADParameters(a.sendAEAD, suite) + } + + a.nextSendTrafficSecret = a.getNextTrafficSecret(suite.Hash, trafficSecret) + a.nextSendAEAD = createAEAD(suite, a.nextSendTrafficSecret, a.version) +} + +func (a *updatableAEAD) setAEADParameters(aead cipher.AEAD, suite *cipherSuite) { + a.nonceBuf = make([]byte, aead.NonceSize()) + a.aeadOverhead = aead.Overhead() + a.suite = suite + switch suite.ID { + case tls.TLS_AES_128_GCM_SHA256, tls.TLS_AES_256_GCM_SHA384: + a.invalidPacketLimit = protocol.InvalidPacketLimitAES + case tls.TLS_CHACHA20_POLY1305_SHA256: + a.invalidPacketLimit = protocol.InvalidPacketLimitChaCha + default: + panic(fmt.Sprintf("unknown cipher suite %d", suite.ID)) + } +} + +func (a *updatableAEAD) DecodePacketNumber(wirePN protocol.PacketNumber, wirePNLen protocol.PacketNumberLen) protocol.PacketNumber { + return protocol.DecodePacketNumber(wirePNLen, a.highestRcvdPN, wirePN) +} + +func (a *updatableAEAD) Open(dst, src []byte, rcvTime time.Time, pn protocol.PacketNumber, kp protocol.KeyPhaseBit, ad []byte) ([]byte, error) { + dec, err := a.open(dst, src, rcvTime, pn, kp, ad) + if err == ErrDecryptionFailed { + a.invalidPacketCount++ + if a.invalidPacketCount >= a.invalidPacketLimit { + return nil, &qerr.TransportError{ErrorCode: qerr.AEADLimitReached} + } + } + if err == nil { + a.highestRcvdPN = max(a.highestRcvdPN, pn) + } + return dec, err +} + +func (a *updatableAEAD) open(dst, src []byte, rcvTime time.Time, pn protocol.PacketNumber, kp protocol.KeyPhaseBit, ad []byte) ([]byte, error) { + if a.prevRcvAEAD != nil && !a.prevRcvAEADExpiry.IsZero() && rcvTime.After(a.prevRcvAEADExpiry) { + a.prevRcvAEAD = nil + a.logger.Debugf("Dropping key phase %d", a.keyPhase-1) + a.prevRcvAEADExpiry = time.Time{} + if a.tracer != nil && a.tracer.DroppedKey != nil { + a.tracer.DroppedKey(a.keyPhase - 1) + } + } + binary.BigEndian.PutUint64(a.nonceBuf[len(a.nonceBuf)-8:], uint64(pn)) + if kp != a.keyPhase.Bit() { + if a.keyPhase > 0 && a.firstRcvdWithCurrentKey == protocol.InvalidPacketNumber || pn < a.firstRcvdWithCurrentKey { + if a.prevRcvAEAD == nil { + return nil, ErrKeysDropped + } + // we updated the key, but the peer hasn't updated yet + dec, err := a.prevRcvAEAD.Open(dst, a.nonceBuf, src, ad) + if err != nil { + err = ErrDecryptionFailed + } + return dec, err + } + // try opening the packet with the next key phase + dec, err := a.nextRcvAEAD.Open(dst, a.nonceBuf, src, ad) + if err != nil { + return nil, ErrDecryptionFailed + } + // Opening succeeded. Check if the peer was allowed to update. + if a.keyPhase > 0 && a.firstSentWithCurrentKey == protocol.InvalidPacketNumber { + return nil, &qerr.TransportError{ + ErrorCode: qerr.KeyUpdateError, + ErrorMessage: "keys updated too quickly", + } + } + a.rollKeys() + a.logger.Debugf("Peer updated keys to %d", a.keyPhase) + // The peer initiated this key update. It's safe to drop the keys for the previous generation now. + // Start a timer to drop the previous key generation. + a.startKeyDropTimer(rcvTime) + if a.tracer != nil && a.tracer.UpdatedKey != nil { + a.tracer.UpdatedKey(a.keyPhase, true) + } + a.firstRcvdWithCurrentKey = pn + return dec, err + } + // The AEAD we're using here will be the qtls.aeadAESGCM13. + // It uses the nonce provided here and XOR it with the IV. + dec, err := a.rcvAEAD.Open(dst, a.nonceBuf, src, ad) + if err != nil { + return dec, ErrDecryptionFailed + } + a.numRcvdWithCurrentKey++ + if a.firstRcvdWithCurrentKey == protocol.InvalidPacketNumber { + // We initiated the key updated, and now we received the first packet protected with the new key phase. + // Therefore, we are certain that the peer rolled its keys as well. Start a timer to drop the old keys. + if a.keyPhase > 0 { + a.logger.Debugf("Peer confirmed key update to phase %d", a.keyPhase) + a.startKeyDropTimer(rcvTime) + } + a.firstRcvdWithCurrentKey = pn + } + return dec, err +} + +func (a *updatableAEAD) Seal(dst, src []byte, pn protocol.PacketNumber, ad []byte) []byte { + if a.firstSentWithCurrentKey == protocol.InvalidPacketNumber { + a.firstSentWithCurrentKey = pn + } + if a.firstPacketNumber == protocol.InvalidPacketNumber { + a.firstPacketNumber = pn + } + a.numSentWithCurrentKey++ + binary.BigEndian.PutUint64(a.nonceBuf[len(a.nonceBuf)-8:], uint64(pn)) + // The AEAD we're using here will be the qtls.aeadAESGCM13. + // It uses the nonce provided here and XOR it with the IV. + return a.sendAEAD.Seal(dst, a.nonceBuf, src, ad) +} + +func (a *updatableAEAD) SetLargestAcked(pn protocol.PacketNumber) error { + if a.firstSentWithCurrentKey != protocol.InvalidPacketNumber && + pn >= a.firstSentWithCurrentKey && a.numRcvdWithCurrentKey == 0 { + return &qerr.TransportError{ + ErrorCode: qerr.KeyUpdateError, + ErrorMessage: fmt.Sprintf("received ACK for key phase %d, but peer didn't update keys", a.keyPhase), + } + } + a.largestAcked = pn + return nil +} + +func (a *updatableAEAD) SetHandshakeConfirmed() { + a.handshakeConfirmed = true +} + +func (a *updatableAEAD) updateAllowed() bool { + if !a.handshakeConfirmed { + return false + } + // the first key update is allowed as soon as the handshake is confirmed + return a.keyPhase == 0 || + // subsequent key updates as soon as a packet sent with that key phase has been acknowledged + (a.firstSentWithCurrentKey != protocol.InvalidPacketNumber && + a.largestAcked != protocol.InvalidPacketNumber && + a.largestAcked >= a.firstSentWithCurrentKey) +} + +func (a *updatableAEAD) shouldInitiateKeyUpdate() bool { + if !a.updateAllowed() { + return false + } + // Initiate the first key update shortly after the handshake, in order to exercise the key update mechanism. + if a.keyPhase == 0 { + if a.numRcvdWithCurrentKey >= FirstKeyUpdateInterval || a.numSentWithCurrentKey >= FirstKeyUpdateInterval { + return true + } + } + if a.numRcvdWithCurrentKey >= KeyUpdateInterval { + a.logger.Debugf("Received %d packets with current key phase. Initiating key update to the next key phase: %d", a.numRcvdWithCurrentKey, a.keyPhase+1) + return true + } + if a.numSentWithCurrentKey >= KeyUpdateInterval { + a.logger.Debugf("Sent %d packets with current key phase. Initiating key update to the next key phase: %d", a.numSentWithCurrentKey, a.keyPhase+1) + return true + } + return false +} + +func (a *updatableAEAD) KeyPhase() protocol.KeyPhaseBit { + if a.shouldInitiateKeyUpdate() { + a.rollKeys() + a.logger.Debugf("Initiating key update to key phase %d", a.keyPhase) + if a.tracer != nil && a.tracer.UpdatedKey != nil { + a.tracer.UpdatedKey(a.keyPhase, false) + } + } + return a.keyPhase.Bit() +} + +func (a *updatableAEAD) Overhead() int { + return a.aeadOverhead +} + +func (a *updatableAEAD) EncryptHeader(sample []byte, firstByte *byte, hdrBytes []byte) { + a.headerEncrypter.EncryptHeader(sample, firstByte, hdrBytes) +} + +func (a *updatableAEAD) DecryptHeader(sample []byte, firstByte *byte, hdrBytes []byte) { + a.headerDecrypter.DecryptHeader(sample, firstByte, hdrBytes) +} + +func (a *updatableAEAD) FirstPacketNumber() protocol.PacketNumber { + return a.firstPacketNumber +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/logutils/frame.go b/backend/vendor/github.com/enetx/uquic/internal/logutils/frame.go new file mode 100644 index 0000000..8d4516b --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/logutils/frame.go @@ -0,0 +1,50 @@ +package logutils + +import ( + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/wire" + "github.com/enetx/uquic/logging" +) + +// ConvertFrame converts a wire.Frame into a logging.Frame. +// This makes it possible for external packages to access the frames. +// Furthermore, it removes the data slices from CRYPTO and STREAM frames. +func ConvertFrame(frame wire.Frame) logging.Frame { + switch f := frame.(type) { + case *wire.AckFrame: + // We use a pool for ACK frames. + // Implementations of the tracer interface may hold on to frames, so we need to make a copy here. + return ConvertAckFrame(f) + case *wire.CryptoFrame: + return &logging.CryptoFrame{ + Offset: f.Offset, + Length: protocol.ByteCount(len(f.Data)), + } + case *wire.StreamFrame: + return &logging.StreamFrame{ + StreamID: f.StreamID, + Offset: f.Offset, + Length: f.DataLen(), + Fin: f.Fin, + } + case *wire.DatagramFrame: + return &logging.DatagramFrame{ + Length: logging.ByteCount(len(f.Data)), + } + default: + return logging.Frame(frame) + } +} + +func ConvertAckFrame(f *wire.AckFrame) *logging.AckFrame { + ranges := make([]wire.AckRange, 0, len(f.AckRanges)) + ranges = append(ranges, f.AckRanges...) + ack := &logging.AckFrame{ + AckRanges: ranges, + DelayTime: f.DelayTime, + ECNCE: f.ECNCE, + ECT0: f.ECT0, + ECT1: f.ECT1, + } + return ack +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/protocol/connection_id.go b/backend/vendor/github.com/enetx/uquic/internal/protocol/connection_id.go new file mode 100644 index 0000000..77259b5 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/protocol/connection_id.go @@ -0,0 +1,116 @@ +package protocol + +import ( + "crypto/rand" + "errors" + "fmt" + "io" +) + +var ErrInvalidConnectionIDLen = errors.New("invalid Connection ID length") + +// An ArbitraryLenConnectionID is a QUIC Connection ID able to represent Connection IDs according to RFC 8999. +// Future QUIC versions might allow connection ID lengths up to 255 bytes, while QUIC v1 +// restricts the length to 20 bytes. +type ArbitraryLenConnectionID []byte + +func (c ArbitraryLenConnectionID) Len() int { + return len(c) +} + +func (c ArbitraryLenConnectionID) Bytes() []byte { + return c +} + +func (c ArbitraryLenConnectionID) String() string { + if c.Len() == 0 { + return "(empty)" + } + return fmt.Sprintf("%x", c.Bytes()) +} + +const maxConnectionIDLen = 20 + +// A ConnectionID in QUIC +type ConnectionID struct { + b [20]byte + l uint8 +} + +// GenerateConnectionID generates a connection ID using cryptographic random +func GenerateConnectionID(l int) (ConnectionID, error) { + var c ConnectionID + c.l = uint8(l) + _, err := rand.Read(c.b[:l]) + return c, err +} + +// ParseConnectionID interprets b as a Connection ID. +// It panics if b is longer than 20 bytes. +func ParseConnectionID(b []byte) ConnectionID { + if len(b) > maxConnectionIDLen { + panic("invalid conn id length") + } + var c ConnectionID + c.l = uint8(len(b)) + copy(c.b[:c.l], b) + return c +} + +// GenerateConnectionIDForInitial generates a connection ID for the Initial packet. +// It uses a length randomly chosen between 8 and 20 bytes. +func GenerateConnectionIDForInitial() (ConnectionID, error) { + r := make([]byte, 1) + if _, err := rand.Read(r); err != nil { + return ConnectionID{}, err + } + l := MinConnectionIDLenInitial + int(r[0])%(maxConnectionIDLen-MinConnectionIDLenInitial+1) + return GenerateConnectionID(l) +} + +// ReadConnectionID reads a connection ID of length len from the given io.Reader. +// It returns io.EOF if there are not enough bytes to read. +func ReadConnectionID(r io.Reader, l int) (ConnectionID, error) { + var c ConnectionID + if l == 0 { + return c, nil + } + if l > maxConnectionIDLen { + return c, ErrInvalidConnectionIDLen + } + c.l = uint8(l) + _, err := io.ReadFull(r, c.b[:l]) + if err == io.ErrUnexpectedEOF { + return c, io.EOF + } + return c, err +} + +// Len returns the length of the connection ID in bytes +func (c ConnectionID) Len() int { + return int(c.l) +} + +// Bytes returns the byte representation +func (c ConnectionID) Bytes() []byte { + return c.b[:c.l] +} + +func (c ConnectionID) String() string { + if c.Len() == 0 { + return "(empty)" + } + return fmt.Sprintf("%x", c.Bytes()) +} + +type DefaultConnectionIDGenerator struct { + ConnLen int +} + +func (d *DefaultConnectionIDGenerator) GenerateConnectionID() (ConnectionID, error) { + return GenerateConnectionID(d.ConnLen) +} + +func (d *DefaultConnectionIDGenerator) ConnectionIDLen() int { + return d.ConnLen +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/protocol/encryption_level.go b/backend/vendor/github.com/enetx/uquic/internal/protocol/encryption_level.go new file mode 100644 index 0000000..32d38ab --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/protocol/encryption_level.go @@ -0,0 +1,30 @@ +package protocol + +// EncryptionLevel is the encryption level +// Default value is Unencrypted +type EncryptionLevel uint8 + +const ( + // EncryptionInitial is the Initial encryption level + EncryptionInitial EncryptionLevel = 1 + iota + // EncryptionHandshake is the Handshake encryption level + EncryptionHandshake + // Encryption0RTT is the 0-RTT encryption level + Encryption0RTT + // Encryption1RTT is the 1-RTT encryption level + Encryption1RTT +) + +func (e EncryptionLevel) String() string { + switch e { + case EncryptionInitial: + return "Initial" + case EncryptionHandshake: + return "Handshake" + case Encryption0RTT: + return "0-RTT" + case Encryption1RTT: + return "1-RTT" + } + return "unknown" +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/protocol/key_phase.go b/backend/vendor/github.com/enetx/uquic/internal/protocol/key_phase.go new file mode 100644 index 0000000..edd740c --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/protocol/key_phase.go @@ -0,0 +1,36 @@ +package protocol + +// KeyPhase is the key phase +type KeyPhase uint64 + +// Bit determines the key phase bit +func (p KeyPhase) Bit() KeyPhaseBit { + if p%2 == 0 { + return KeyPhaseZero + } + return KeyPhaseOne +} + +// KeyPhaseBit is the key phase bit +type KeyPhaseBit uint8 + +const ( + // KeyPhaseUndefined is an undefined key phase + KeyPhaseUndefined KeyPhaseBit = iota + // KeyPhaseZero is key phase 0 + KeyPhaseZero + // KeyPhaseOne is key phase 1 + KeyPhaseOne +) + +func (p KeyPhaseBit) String() string { + //nolint:exhaustive + switch p { + case KeyPhaseZero: + return "0" + case KeyPhaseOne: + return "1" + default: + return "undefined" + } +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/protocol/packet_number.go b/backend/vendor/github.com/enetx/uquic/internal/protocol/packet_number.go new file mode 100644 index 0000000..bd34016 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/protocol/packet_number.go @@ -0,0 +1,79 @@ +package protocol + +// A PacketNumber in QUIC +type PacketNumber int64 + +// InvalidPacketNumber is a packet number that is never sent. +// In QUIC, 0 is a valid packet number. +const InvalidPacketNumber PacketNumber = -1 + +// PacketNumberLen is the length of the packet number in bytes +type PacketNumberLen uint8 + +const ( + // PacketNumberLen1 is a packet number length of 1 byte + PacketNumberLen1 PacketNumberLen = 1 + // PacketNumberLen2 is a packet number length of 2 bytes + PacketNumberLen2 PacketNumberLen = 2 + // PacketNumberLen3 is a packet number length of 3 bytes + PacketNumberLen3 PacketNumberLen = 3 + // PacketNumberLen4 is a packet number length of 4 bytes + PacketNumberLen4 PacketNumberLen = 4 +) + +// DecodePacketNumber calculates the packet number based on the received packet number, its length and the last seen packet number +func DecodePacketNumber( + packetNumberLength PacketNumberLen, + lastPacketNumber PacketNumber, + wirePacketNumber PacketNumber, +) PacketNumber { + var epochDelta PacketNumber + switch packetNumberLength { + case PacketNumberLen1: + epochDelta = PacketNumber(1) << 8 + case PacketNumberLen2: + epochDelta = PacketNumber(1) << 16 + case PacketNumberLen3: + epochDelta = PacketNumber(1) << 24 + case PacketNumberLen4: + epochDelta = PacketNumber(1) << 32 + } + epoch := lastPacketNumber & ^(epochDelta - 1) + var prevEpochBegin PacketNumber + if epoch > epochDelta { + prevEpochBegin = epoch - epochDelta + } + nextEpochBegin := epoch + epochDelta + return closestTo( + lastPacketNumber+1, + epoch+wirePacketNumber, + closestTo(lastPacketNumber+1, prevEpochBegin+wirePacketNumber, nextEpochBegin+wirePacketNumber), + ) +} + +func closestTo(target, a, b PacketNumber) PacketNumber { + if delta(target, a) < delta(target, b) { + return a + } + return b +} + +func delta(a, b PacketNumber) PacketNumber { + if a < b { + return b - a + } + return a - b +} + +// GetPacketNumberLengthForHeader gets the length of the packet number for the public header +// it never chooses a PacketNumberLen of 1 byte, since this is too short under certain circumstances +func GetPacketNumberLengthForHeader(packetNumber, leastUnacked PacketNumber) PacketNumberLen { + diff := uint64(packetNumber - leastUnacked) + if diff < (1 << (16 - 1)) { + return PacketNumberLen2 + } + if diff < (1 << (24 - 1)) { + return PacketNumberLen3 + } + return PacketNumberLen4 +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/protocol/params.go b/backend/vendor/github.com/enetx/uquic/internal/protocol/params.go new file mode 100644 index 0000000..487cbc0 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/protocol/params.go @@ -0,0 +1,183 @@ +package protocol + +import "time" + +// DesiredReceiveBufferSize is the kernel UDP receive buffer size that we'd like to use. +const DesiredReceiveBufferSize = (1 << 20) * 2 // 2 MB + +// DesiredSendBufferSize is the kernel UDP send buffer size that we'd like to use. +const DesiredSendBufferSize = (1 << 20) * 2 // 2 MB + +// InitialPacketSizeIPv4 is the maximum packet size that we use for sending IPv4 packets. +const InitialPacketSizeIPv4 = 1252 + +// InitialPacketSizeIPv6 is the maximum packet size that we use for sending IPv6 packets. +const InitialPacketSizeIPv6 = 1232 + +// MaxCongestionWindowPackets is the maximum congestion window in packet. +const MaxCongestionWindowPackets = 10000 + +// MaxUndecryptablePackets limits the number of undecryptable packets that are queued in the connection. +const MaxUndecryptablePackets = 32 + +// ConnectionFlowControlMultiplier determines how much larger the connection flow control windows needs to be relative to any stream's flow control window +// This is the value that Chromium is using +const ConnectionFlowControlMultiplier = 1.5 + +// DefaultInitialMaxStreamData is the default initial stream-level flow control window for receiving data +const DefaultInitialMaxStreamData = (1 << 10) * 512 // 512 kb + +// DefaultInitialMaxData is the connection-level flow control window for receiving data +const DefaultInitialMaxData = ConnectionFlowControlMultiplier * DefaultInitialMaxStreamData + +// DefaultMaxReceiveStreamFlowControlWindow is the default maximum stream-level flow control window for receiving data +const DefaultMaxReceiveStreamFlowControlWindow = 6 * (1 << 20) // 6 MB + +// DefaultMaxReceiveConnectionFlowControlWindow is the default connection-level flow control window for receiving data +const DefaultMaxReceiveConnectionFlowControlWindow = 15 * (1 << 20) // 15 MB + +// WindowUpdateThreshold is the fraction of the receive window that has to be consumed before an higher offset is advertised to the client +const WindowUpdateThreshold = 0.25 + +// DefaultMaxIncomingStreams is the maximum number of streams that a peer may open +const DefaultMaxIncomingStreams = 100 + +// DefaultMaxIncomingUniStreams is the maximum number of unidirectional streams that a peer may open +const DefaultMaxIncomingUniStreams = 100 + +// MaxServerUnprocessedPackets is the max number of packets stored in the server that are not yet processed. +const MaxServerUnprocessedPackets = 1024 + +// MaxConnUnprocessedPackets is the max number of packets stored in each connection that are not yet processed. +const MaxConnUnprocessedPackets = 256 + +// SkipPacketInitialPeriod is the initial period length used for packet number skipping to prevent an Optimistic ACK attack. +// Every time a packet number is skipped, the period is doubled, up to SkipPacketMaxPeriod. +const SkipPacketInitialPeriod PacketNumber = 256 + +// SkipPacketMaxPeriod is the maximum period length used for packet number skipping. +const SkipPacketMaxPeriod PacketNumber = 128 * 1024 + +// MaxAcceptQueueSize is the maximum number of connections that the server queues for accepting. +// If the queue is full, new connection attempts will be rejected. +const MaxAcceptQueueSize = 32 + +// TokenValidity is the duration that a (non-retry) token is considered valid +const TokenValidity = 24 * time.Hour + +// MaxOutstandingSentPackets is maximum number of packets saved for retransmission. +// When reached, it imposes a soft limit on sending new packets: +// Sending ACKs and retransmission is still allowed, but now new regular packets can be sent. +const MaxOutstandingSentPackets = 2 * MaxCongestionWindowPackets + +// MaxTrackedSentPackets is maximum number of sent packets saved for retransmission. +// When reached, no more packets will be sent. +// This value *must* be larger than MaxOutstandingSentPackets. +const MaxTrackedSentPackets = MaxOutstandingSentPackets * 5 / 4 + +// MaxNonAckElicitingAcks is the maximum number of packets containing an ACK, +// but no ack-eliciting frames, that we send in a row +const MaxNonAckElicitingAcks = 19 + +// MaxStreamFrameSorterGaps is the maximum number of gaps between received StreamFrames +// prevents DoS attacks against the streamFrameSorter +const MaxStreamFrameSorterGaps = 1000 + +// MinStreamFrameBufferSize is the minimum data length of a received STREAM frame +// that we use the buffer for. This protects against a DoS where an attacker would send us +// very small STREAM frames to consume a lot of memory. +const MinStreamFrameBufferSize = 128 + +// MinCoalescedPacketSize is the minimum size of a coalesced packet that we pack. +// If a packet has less than this number of bytes, we won't coalesce any more packets onto it. +const MinCoalescedPacketSize = 128 + +// MaxCryptoStreamOffset is the maximum offset allowed on any of the crypto streams. +// This limits the size of the ClientHello and Certificates that can be received. +const MaxCryptoStreamOffset = 16 * (1 << 10) + +// MinRemoteIdleTimeout is the minimum value that we accept for the remote idle timeout +const MinRemoteIdleTimeout = 5 * time.Second + +// DefaultIdleTimeout is the default idle timeout +const DefaultIdleTimeout = 30 * time.Second + +// DefaultHandshakeIdleTimeout is the default idle timeout used before handshake completion. +const DefaultHandshakeIdleTimeout = 5 * time.Second + +// MaxKeepAliveInterval is the maximum time until we send a packet to keep a connection alive. +// It should be shorter than the time that NATs clear their mapping. +const MaxKeepAliveInterval = 20 * time.Second + +// RetiredConnectionIDDeleteTimeout is the time we keep closed connections around in order to retransmit the CONNECTION_CLOSE. +// after this time all information about the old connection will be deleted +const RetiredConnectionIDDeleteTimeout = 5 * time.Second + +// MinStreamFrameSize is the minimum size that has to be left in a packet, so that we add another STREAM frame. +// This avoids splitting up STREAM frames into small pieces, which has 2 advantages: +// 1. it reduces the framing overhead +// 2. it reduces the head-of-line blocking, when a packet is lost +const MinStreamFrameSize ByteCount = 128 + +// MaxPostHandshakeCryptoFrameSize is the maximum size of CRYPTO frames +// we send after the handshake completes. +const MaxPostHandshakeCryptoFrameSize = 1000 + +// MaxAckFrameSize is the maximum size for an ACK frame that we write +// Due to the varint encoding, ACK frames can grow (almost) indefinitely large. +// The MaxAckFrameSize should be large enough to encode many ACK range, +// but must ensure that a maximum size ACK frame fits into one packet. +const MaxAckFrameSize ByteCount = 1000 + +// MaxNumAckRanges is the maximum number of ACK ranges that we send in an ACK frame. +// It also serves as a limit for the packet history. +// If at any point we keep track of more ranges, old ranges are discarded. +const MaxNumAckRanges = 32 + +// MinPacingDelay is the minimum duration that is used for packet pacing +// If the packet packing frequency is higher, multiple packets might be sent at once. +// Example: For a packet pacing delay of 200μs, we would send 5 packets at once, wait for 1ms, and so forth. +const MinPacingDelay = time.Millisecond + +// DefaultConnectionIDLength is the connection ID length that is used for multiplexed connections +// if no other value is configured. +const DefaultConnectionIDLength = 4 + +// MaxActiveConnectionIDs is the number of connection IDs that we're storing. +const MaxActiveConnectionIDs = 4 + +// MaxIssuedConnectionIDs is the maximum number of connection IDs that we're issuing at the same time. +const MaxIssuedConnectionIDs = 6 + +// PacketsPerConnectionID is the number of packets we send using one connection ID. +// If the peer provices us with enough new connection IDs, we switch to a new connection ID. +const PacketsPerConnectionID = 10000 + +// AckDelayExponent is the ack delay exponent used when sending ACKs. +const AckDelayExponent = 3 + +// Estimated timer granularity. +// The loss detection timer will not be set to a value smaller than granularity. +const TimerGranularity = time.Millisecond + +// MaxAckDelay is the maximum time by which we delay sending ACKs. +const MaxAckDelay = 25 * time.Millisecond + +// MaxAckDelayInclGranularity is the max_ack_delay including the timer granularity. +// This is the value that should be advertised to the peer. +const MaxAckDelayInclGranularity = MaxAckDelay + TimerGranularity + +// KeyUpdateInterval is the maximum number of packets we send or receive before initiating a key update. +const KeyUpdateInterval = 100 * 1000 + +// Max0RTTQueueingDuration is the maximum time that we store 0-RTT packets in order to wait for the corresponding Initial to be received. +const Max0RTTQueueingDuration = 100 * time.Millisecond + +// Max0RTTQueues is the maximum number of connections that we buffer 0-RTT packets for. +const Max0RTTQueues = 32 + +// Max0RTTQueueLen is the maximum number of 0-RTT packets that we buffer for each connection. +// When a new connection is created, all buffered packets are passed to the connection immediately. +// To avoid blocking, this value has to be smaller than MaxConnUnprocessedPackets. +// To avoid packets being dropped as undecryptable by the connection, this value has to be smaller than MaxUndecryptablePackets. +const Max0RTTQueueLen = 31 diff --git a/backend/vendor/github.com/enetx/uquic/internal/protocol/perspective.go b/backend/vendor/github.com/enetx/uquic/internal/protocol/perspective.go new file mode 100644 index 0000000..5a29d3c --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/protocol/perspective.go @@ -0,0 +1,26 @@ +package protocol + +// Perspective determines if we're acting as a server or a client +type Perspective int + +// the perspectives +const ( + PerspectiveServer Perspective = 1 + PerspectiveClient Perspective = 2 +) + +// Opposite returns the perspective of the peer +func (p Perspective) Opposite() Perspective { + return 3 - p +} + +func (p Perspective) String() string { + switch p { + case PerspectiveServer: + return "server" + case PerspectiveClient: + return "client" + default: + return "invalid perspective" + } +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/protocol/protocol.go b/backend/vendor/github.com/enetx/uquic/internal/protocol/protocol.go new file mode 100644 index 0000000..d056cb9 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/protocol/protocol.go @@ -0,0 +1,152 @@ +package protocol + +import ( + "fmt" + "time" +) + +// The PacketType is the Long Header Type +type PacketType uint8 + +const ( + // PacketTypeInitial is the packet type of an Initial packet + PacketTypeInitial PacketType = 1 + iota + // PacketTypeRetry is the packet type of a Retry packet + PacketTypeRetry + // PacketTypeHandshake is the packet type of a Handshake packet + PacketTypeHandshake + // PacketType0RTT is the packet type of a 0-RTT packet + PacketType0RTT +) + +func (t PacketType) String() string { + switch t { + case PacketTypeInitial: + return "Initial" + case PacketTypeRetry: + return "Retry" + case PacketTypeHandshake: + return "Handshake" + case PacketType0RTT: + return "0-RTT Protected" + default: + return fmt.Sprintf("unknown packet type: %d", t) + } +} + +type ECN uint8 + +const ( + ECNUnsupported ECN = iota + ECNNon // 00 + ECT1 // 01 + ECT0 // 10 + ECNCE // 11 +) + +func ParseECNHeaderBits(bits byte) ECN { + switch bits { + case 0: + return ECNNon + case 0b00000010: + return ECT0 + case 0b00000001: + return ECT1 + case 0b00000011: + return ECNCE + default: + panic("invalid ECN bits") + } +} + +func (e ECN) ToHeaderBits() byte { + //nolint:exhaustive // There are only 4 values. + switch e { + case ECNNon: + return 0 + case ECT0: + return 0b00000010 + case ECT1: + return 0b00000001 + case ECNCE: + return 0b00000011 + default: + panic("ECN unsupported") + } +} + +func (e ECN) String() string { + switch e { + case ECNUnsupported: + return "ECN unsupported" + case ECNNon: + return "Not-ECT" + case ECT1: + return "ECT(1)" + case ECT0: + return "ECT(0)" + case ECNCE: + return "CE" + default: + return fmt.Sprintf("invalid ECN value: %d", e) + } +} + +// A ByteCount in QUIC +type ByteCount int64 + +// MaxByteCount is the maximum value of a ByteCount +const MaxByteCount = ByteCount(1<<62 - 1) + +// InvalidByteCount is an invalid byte count +const InvalidByteCount ByteCount = -1 + +// A StatelessResetToken is a stateless reset token. +type StatelessResetToken [16]byte + +// MaxPacketBufferSize maximum packet size of any QUIC packet, based on +// ethernet's max size, minus the IP and UDP headers. IPv6 has a 40 byte header, +// UDP adds an additional 8 bytes. This is a total overhead of 48 bytes. +// Ethernet's max packet size is 1500 bytes, 1500 - 48 = 1452. +const MaxPacketBufferSize = 1452 + +// MaxLargePacketBufferSize is used when using GSO +const MaxLargePacketBufferSize = 20 * 1024 + +// MinInitialPacketSize is the minimum size an Initial packet is required to have. +const MinInitialPacketSize = 1200 + +// MinUnknownVersionPacketSize is the minimum size a packet with an unknown version +// needs to have in order to trigger a Version Negotiation packet. +const MinUnknownVersionPacketSize = MinInitialPacketSize + +// MinStatelessResetSize is the minimum size of a stateless reset packet that we send +const MinStatelessResetSize = 1 /* first byte */ + 20 /* max. conn ID length */ + 4 /* max. packet number length */ + 1 /* min. payload length */ + 16 /* token */ + +// MinConnectionIDLenInitial is the minimum length of the destination connection ID on an Initial packet. +const MinConnectionIDLenInitial = 8 + +// DefaultAckDelayExponent is the default ack delay exponent +const DefaultAckDelayExponent = 3 + +// DefaultActiveConnectionIDLimit is the default active connection ID limit +const DefaultActiveConnectionIDLimit = 2 + +// MaxAckDelayExponent is the maximum ack delay exponent +const MaxAckDelayExponent = 20 + +// DefaultMaxAckDelay is the default max_ack_delay +const DefaultMaxAckDelay = 25 * time.Millisecond + +// MaxMaxAckDelay is the maximum max_ack_delay +const MaxMaxAckDelay = (1<<14 - 1) * time.Millisecond + +// MaxConnIDLen is the maximum length of the connection ID +const MaxConnIDLen = 20 + +// InvalidPacketLimitAES is the maximum number of packets that we can fail to decrypt when using +// AEAD_AES_128_GCM or AEAD_AES_265_GCM. +const InvalidPacketLimitAES = 1 << 52 + +// InvalidPacketLimitChaCha is the maximum number of packets that we can fail to decrypt when using AEAD_CHACHA20_POLY1305. +const InvalidPacketLimitChaCha = 1 << 36 diff --git a/backend/vendor/github.com/enetx/uquic/internal/protocol/stream.go b/backend/vendor/github.com/enetx/uquic/internal/protocol/stream.go new file mode 100644 index 0000000..ad7de86 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/protocol/stream.go @@ -0,0 +1,76 @@ +package protocol + +// StreamType encodes if this is a unidirectional or bidirectional stream +type StreamType uint8 + +const ( + // StreamTypeUni is a unidirectional stream + StreamTypeUni StreamType = iota + // StreamTypeBidi is a bidirectional stream + StreamTypeBidi +) + +// InvalidPacketNumber is a stream ID that is invalid. +// The first valid stream ID in QUIC is 0. +const InvalidStreamID StreamID = -1 + +// StreamNum is the stream number +type StreamNum int64 + +const ( + // InvalidStreamNum is an invalid stream number. + InvalidStreamNum = -1 + // MaxStreamCount is the maximum stream count value that can be sent in MAX_STREAMS frames + // and as the stream count in the transport parameters + MaxStreamCount StreamNum = 1 << 60 +) + +// StreamID calculates the stream ID. +func (s StreamNum) StreamID(stype StreamType, pers Perspective) StreamID { + if s == 0 { + return InvalidStreamID + } + var first StreamID + switch stype { + case StreamTypeBidi: + switch pers { + case PerspectiveClient: + first = 0 + case PerspectiveServer: + first = 1 + } + case StreamTypeUni: + switch pers { + case PerspectiveClient: + first = 2 + case PerspectiveServer: + first = 3 + } + } + return first + 4*StreamID(s-1) +} + +// A StreamID in QUIC +type StreamID int64 + +// InitiatedBy says if the stream was initiated by the client or by the server +func (s StreamID) InitiatedBy() Perspective { + if s%2 == 0 { + return PerspectiveClient + } + return PerspectiveServer +} + +// Type says if this is a unidirectional or bidirectional stream +func (s StreamID) Type() StreamType { + if s%4 >= 2 { + return StreamTypeUni + } + return StreamTypeBidi +} + +// StreamNum returns how many streams in total are below this +// Example: for stream 9 it returns 3 (i.e. streams 1, 5 and 9) +func (s StreamID) StreamNum() StreamNum { + return StreamNum(s/4) + 1 +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/protocol/u_connection_id.go b/backend/vendor/github.com/enetx/uquic/internal/protocol/u_connection_id.go new file mode 100644 index 0000000..8f3b388 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/protocol/u_connection_id.go @@ -0,0 +1,16 @@ +package protocol + +// [UQUIC] +func GenerateConnectionIDForInitialWithLen(l int) (ConnectionID, error) { + return GenerateConnectionID(l) +} + +type ExpEmptyConnectionIDGenerator struct{} + +func (g *ExpEmptyConnectionIDGenerator) GenerateConnectionID() (ConnectionID, error) { + return GenerateConnectionID(0) +} + +func (g *ExpEmptyConnectionIDGenerator) ConnectionIDLen() int { + return 0 +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/protocol/version.go b/backend/vendor/github.com/enetx/uquic/internal/protocol/version.go new file mode 100644 index 0000000..025ade9 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/protocol/version.go @@ -0,0 +1,114 @@ +package protocol + +import ( + "encoding/binary" + "fmt" + "math" + "sync" + "time" + + "golang.org/x/exp/rand" +) + +// Version is a version number as int +type Version uint32 + +// gQUIC version range as defined in the wiki: https://github.com/quicwg/base-drafts/wiki/QUIC-Versions +const ( + gquicVersion0 = 0x51303030 + maxGquicVersion = 0x51303439 +) + +// The version numbers, making grepping easier +const ( + VersionUnknown Version = math.MaxUint32 + versionDraft29 Version = 0xff00001d // draft-29 used to be a widely deployed version + Version1 Version = 0x1 + Version2 Version = 0x6b3343cf +) + +// SupportedVersions lists the versions that the server supports +// must be in sorted descending order +var SupportedVersions = []Version{Version1, Version2} + +// IsValidVersion says if the version is known to quic-go +func IsValidVersion(v Version) bool { + return v == Version1 || IsSupportedVersion(SupportedVersions, v) +} + +func (vn Version) String() string { + //nolint:exhaustive + switch vn { + case VersionUnknown: + return "unknown" + case versionDraft29: + return "draft-29" + case Version1: + return "v1" + case Version2: + return "v2" + default: + if vn.isGQUIC() { + return fmt.Sprintf("gQUIC %d", vn.toGQUICVersion()) + } + return fmt.Sprintf("%#x", uint32(vn)) + } +} + +func (vn Version) isGQUIC() bool { + return vn > gquicVersion0 && vn <= maxGquicVersion +} + +func (vn Version) toGQUICVersion() int { + return int(10*(vn-gquicVersion0)/0x100) + int(vn%0x10) +} + +// IsSupportedVersion returns true if the server supports this version +func IsSupportedVersion(supported []Version, v Version) bool { + for _, t := range supported { + if t == v { + return true + } + } + return false +} + +// ChooseSupportedVersion finds the best version in the overlap of ours and theirs +// ours is a slice of versions that we support, sorted by our preference (descending) +// theirs is a slice of versions offered by the peer. The order does not matter. +// The bool returned indicates if a matching version was found. +func ChooseSupportedVersion(ours, theirs []Version) (Version, bool) { + for _, ourVer := range ours { + for _, theirVer := range theirs { + if ourVer == theirVer { + return ourVer, true + } + } + } + return 0, false +} + +var ( + versionNegotiationMx sync.Mutex + versionNegotiationRand = rand.New(rand.NewSource(uint64(time.Now().UnixNano()))) +) + +// generateReservedVersion generates a reserved version (v & 0x0f0f0f0f == 0x0a0a0a0a) +func generateReservedVersion() Version { + var b [4]byte + _, _ = versionNegotiationRand.Read(b[:]) // ignore the error here. Failure to read random data doesn't break anything + return Version((binary.BigEndian.Uint32(b[:]) | 0x0a0a0a0a) & 0xfafafafa) +} + +// GetGreasedVersions adds one reserved version number to a slice of version numbers, at a random position. +// It doesn't modify the supported slice. +func GetGreasedVersions(supported []Version) []Version { + versionNegotiationMx.Lock() + defer versionNegotiationMx.Unlock() + randPos := rand.Intn(len(supported) + 1) + greased := make([]Version, len(supported)+1) + copy(greased, supported[:randPos]) + greased[randPos] = generateReservedVersion() + copy(greased[randPos+1:], supported[randPos:]) + return greased +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/qerr/error_codes.go b/backend/vendor/github.com/enetx/uquic/internal/qerr/error_codes.go new file mode 100644 index 0000000..0036130 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/qerr/error_codes.go @@ -0,0 +1,87 @@ +package qerr + +import ( + "crypto/tls" + "fmt" +) + +// TransportErrorCode is a QUIC transport error. +type TransportErrorCode uint64 + +// The error codes defined by QUIC +const ( + NoError TransportErrorCode = 0x0 + InternalError TransportErrorCode = 0x1 + ConnectionRefused TransportErrorCode = 0x2 + FlowControlError TransportErrorCode = 0x3 + StreamLimitError TransportErrorCode = 0x4 + StreamStateError TransportErrorCode = 0x5 + FinalSizeError TransportErrorCode = 0x6 + FrameEncodingError TransportErrorCode = 0x7 + TransportParameterError TransportErrorCode = 0x8 + ConnectionIDLimitError TransportErrorCode = 0x9 + ProtocolViolation TransportErrorCode = 0xa + InvalidToken TransportErrorCode = 0xb + ApplicationErrorErrorCode TransportErrorCode = 0xc + CryptoBufferExceeded TransportErrorCode = 0xd + KeyUpdateError TransportErrorCode = 0xe + AEADLimitReached TransportErrorCode = 0xf + NoViablePathError TransportErrorCode = 0x10 +) + +func (e TransportErrorCode) IsCryptoError() bool { + return e >= 0x100 && e < 0x200 +} + +// Message is a description of the error. +// It only returns a non-empty string for crypto errors. +func (e TransportErrorCode) Message() string { + if !e.IsCryptoError() { + return "" + } + return tls.AlertError(e - 0x100).Error() +} + +func (e TransportErrorCode) String() string { + switch e { + case NoError: + return "NO_ERROR" + case InternalError: + return "INTERNAL_ERROR" + case ConnectionRefused: + return "CONNECTION_REFUSED" + case FlowControlError: + return "FLOW_CONTROL_ERROR" + case StreamLimitError: + return "STREAM_LIMIT_ERROR" + case StreamStateError: + return "STREAM_STATE_ERROR" + case FinalSizeError: + return "FINAL_SIZE_ERROR" + case FrameEncodingError: + return "FRAME_ENCODING_ERROR" + case TransportParameterError: + return "TRANSPORT_PARAMETER_ERROR" + case ConnectionIDLimitError: + return "CONNECTION_ID_LIMIT_ERROR" + case ProtocolViolation: + return "PROTOCOL_VIOLATION" + case InvalidToken: + return "INVALID_TOKEN" + case ApplicationErrorErrorCode: + return "APPLICATION_ERROR" + case CryptoBufferExceeded: + return "CRYPTO_BUFFER_EXCEEDED" + case KeyUpdateError: + return "KEY_UPDATE_ERROR" + case AEADLimitReached: + return "AEAD_LIMIT_REACHED" + case NoViablePathError: + return "NO_VIABLE_PATH" + default: + if e.IsCryptoError() { + return fmt.Sprintf("CRYPTO_ERROR %#x", uint16(e)) + } + return fmt.Sprintf("unknown error code: %#x", uint16(e)) + } +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/qerr/errors.go b/backend/vendor/github.com/enetx/uquic/internal/qerr/errors.go new file mode 100644 index 0000000..f8e1183 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/qerr/errors.go @@ -0,0 +1,139 @@ +package qerr + +import ( + "fmt" + "net" + + "github.com/enetx/uquic/internal/protocol" +) + +var ( + ErrHandshakeTimeout = &HandshakeTimeoutError{} + ErrIdleTimeout = &IdleTimeoutError{} +) + +type TransportError struct { + Remote bool + FrameType uint64 + ErrorCode TransportErrorCode + ErrorMessage string + error error // only set for local errors, sometimes +} + +var _ error = &TransportError{} + +// NewLocalCryptoError create a new TransportError instance for a crypto error +func NewLocalCryptoError(tlsAlert uint8, err error) *TransportError { + return &TransportError{ + ErrorCode: 0x100 + TransportErrorCode(tlsAlert), + error: err, + } +} + +func (e *TransportError) Error() string { + str := fmt.Sprintf("%s (%s)", e.ErrorCode.String(), getRole(e.Remote)) + if e.FrameType != 0 { + str += fmt.Sprintf(" (frame type: %#x)", e.FrameType) + } + msg := e.ErrorMessage + if len(msg) == 0 && e.error != nil { + msg = e.error.Error() + } + if len(msg) == 0 { + msg = e.ErrorCode.Message() + } + if len(msg) == 0 { + return str + } + return str + ": " + msg +} + +func (e *TransportError) Is(target error) bool { + return target == net.ErrClosed +} + +func (e *TransportError) Unwrap() error { + return e.error +} + +// An ApplicationErrorCode is an application-defined error code. +type ApplicationErrorCode uint64 + +func (e *ApplicationError) Is(target error) bool { + return target == net.ErrClosed +} + +// A StreamErrorCode is an error code used to cancel streams. +type StreamErrorCode uint64 + +type ApplicationError struct { + Remote bool + ErrorCode ApplicationErrorCode + ErrorMessage string +} + +var _ error = &ApplicationError{} + +func (e *ApplicationError) Error() string { + if len(e.ErrorMessage) == 0 { + return fmt.Sprintf("Application error %#x (%s)", e.ErrorCode, getRole(e.Remote)) + } + return fmt.Sprintf("Application error %#x (%s): %s", e.ErrorCode, getRole(e.Remote), e.ErrorMessage) +} + +type IdleTimeoutError struct{} + +var _ error = &IdleTimeoutError{} + +func (e *IdleTimeoutError) Timeout() bool { return true } +func (e *IdleTimeoutError) Temporary() bool { return false } +func (e *IdleTimeoutError) Error() string { return "timeout: no recent network activity" } +func (e *IdleTimeoutError) Is(target error) bool { return target == net.ErrClosed } + +type HandshakeTimeoutError struct{} + +var _ error = &HandshakeTimeoutError{} + +func (e *HandshakeTimeoutError) Timeout() bool { return true } +func (e *HandshakeTimeoutError) Temporary() bool { return false } +func (e *HandshakeTimeoutError) Error() string { return "timeout: handshake did not complete in time" } +func (e *HandshakeTimeoutError) Is(target error) bool { return target == net.ErrClosed } + +// A VersionNegotiationError occurs when the client and the server can't agree on a QUIC version. +type VersionNegotiationError struct { + Ours []protocol.Version + Theirs []protocol.Version +} + +func (e *VersionNegotiationError) Error() string { + return fmt.Sprintf("no compatible QUIC version found (we support %s, server offered %s)", e.Ours, e.Theirs) +} + +func (e *VersionNegotiationError) Is(target error) bool { + return target == net.ErrClosed +} + +// A StatelessResetError occurs when we receive a stateless reset. +type StatelessResetError struct { + Token protocol.StatelessResetToken +} + +var _ net.Error = &StatelessResetError{} + +func (e *StatelessResetError) Error() string { + return fmt.Sprintf("received a stateless reset with token %x", e.Token) +} + +func (e *StatelessResetError) Is(target error) bool { + return target == net.ErrClosed +} + +func (e *StatelessResetError) Timeout() bool { return false } +func (e *StatelessResetError) Temporary() bool { return true } + +func getRole(remote bool) string { + if remote { + return "remote" + } + return "local" +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/qtls/cipher_suite.go b/backend/vendor/github.com/enetx/uquic/internal/qtls/cipher_suite.go new file mode 100644 index 0000000..ab3d549 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/qtls/cipher_suite.go @@ -0,0 +1,53 @@ +package qtls + +import ( + "fmt" + "unsafe" + + tls "github.com/enetx/utls" +) + +//go:linkname cipherSuitesTLS13 github.com/enetx/utls.cipherSuitesTLS13 +var cipherSuitesTLS13 []unsafe.Pointer + +//go:linkname defaultCipherSuitesTLS13 crypto/tls.defaultCipherSuitesTLS13 +var defaultCipherSuitesTLS13 []uint16 + +//go:linkname defaultCipherSuitesTLS13NoAES crypto/tls.defaultCipherSuitesTLS13NoAES +var defaultCipherSuitesTLS13NoAES []uint16 + +var cipherSuitesModified bool + +// SetCipherSuite modifies the cipherSuiteTLS13 slice of cipher suites inside qtls +// such that it only contains the cipher suite with the chosen id. +// The reset function returned resets them back to the original value. +func SetCipherSuite(id uint16) (reset func()) { + if cipherSuitesModified { + panic("cipher suites modified multiple times without resetting") + } + cipherSuitesModified = true + + origCipherSuitesTLS13 := append([]unsafe.Pointer{}, cipherSuitesTLS13...) + origDefaultCipherSuitesTLS13 := append([]uint16{}, defaultCipherSuitesTLS13...) + origDefaultCipherSuitesTLS13NoAES := append([]uint16{}, defaultCipherSuitesTLS13NoAES...) + // The order is given by the order of the slice elements in cipherSuitesTLS13 in qtls. + switch id { + case tls.TLS_AES_128_GCM_SHA256: + cipherSuitesTLS13 = cipherSuitesTLS13[:1] + case tls.TLS_CHACHA20_POLY1305_SHA256: + cipherSuitesTLS13 = cipherSuitesTLS13[1:2] + case tls.TLS_AES_256_GCM_SHA384: + cipherSuitesTLS13 = cipherSuitesTLS13[2:] + default: + panic(fmt.Sprintf("unexpected cipher suite: %d", id)) + } + defaultCipherSuitesTLS13 = []uint16{id} + defaultCipherSuitesTLS13NoAES = []uint16{id} + + return func() { + cipherSuitesTLS13 = origCipherSuitesTLS13 + defaultCipherSuitesTLS13 = origDefaultCipherSuitesTLS13 + defaultCipherSuitesTLS13NoAES = origDefaultCipherSuitesTLS13NoAES + cipherSuitesModified = false + } +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/qtls/client_session_cache.go b/backend/vendor/github.com/enetx/uquic/internal/qtls/client_session_cache.go new file mode 100644 index 0000000..3e009e1 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/qtls/client_session_cache.go @@ -0,0 +1,71 @@ +package qtls + +import ( + "sync" + + tls "github.com/enetx/utls" +) + +type clientSessionCache struct { + mx sync.Mutex + getData func(earlyData bool) []byte + setData func(data []byte, earlyData bool) (allowEarlyData bool) + wrapped tls.ClientSessionCache +} + +var _ tls.ClientSessionCache = &clientSessionCache{} + +func (c *clientSessionCache) Put(key string, cs *tls.ClientSessionState) { + c.mx.Lock() + defer c.mx.Unlock() + + if cs == nil { + c.wrapped.Put(key, nil) + return + } + ticket, state, err := cs.ResumptionState() + if err != nil || state == nil { + c.wrapped.Put(key, cs) + return + } + state.Extra = append(state.Extra, addExtraPrefix(c.getData(state.EarlyData))) + newCS, err := tls.NewResumptionState(ticket, state) + if err != nil { + // It's not clear why this would error. Just save the original state. + c.wrapped.Put(key, cs) + return + } + c.wrapped.Put(key, newCS) +} + +func (c *clientSessionCache) Get(key string) (*tls.ClientSessionState, bool) { + c.mx.Lock() + defer c.mx.Unlock() + + cs, ok := c.wrapped.Get(key) + if !ok || cs == nil { + return cs, ok + } + ticket, state, err := cs.ResumptionState() + if err != nil { + // It's not clear why this would error. + // Remove the ticket from the session cache, so we don't run into this error over and over again + c.wrapped.Put(key, nil) + return nil, false + } + // restore QUIC transport parameters and RTT stored in state.Extra + if extra := findExtraData(state.Extra); extra != nil { + earlyData := c.setData(extra, state.EarlyData) + if state.EarlyData { + state.EarlyData = earlyData + } + } + session, err := tls.NewResumptionState(ticket, state) + if err != nil { + // It's not clear why this would error. + // Remove the ticket from the session cache, so we don't run into this error over and over again + c.wrapped.Put(key, nil) + return nil, false + } + return session, true +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/qtls/qtls.go b/backend/vendor/github.com/enetx/uquic/internal/qtls/qtls.go new file mode 100644 index 0000000..98818cd --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/qtls/qtls.go @@ -0,0 +1,125 @@ +package qtls + +import ( + "bytes" + "fmt" + + tls "github.com/enetx/utls" + + "github.com/enetx/uquic/internal/protocol" +) + +func SetupConfigForServer(qconf *tls.QUICConfig, _ bool, getData func() []byte, handleSessionTicket func([]byte, bool) bool) { + conf := qconf.TLSConfig + + // Workaround for https://github.com/golang/go/issues/60506. + // This initializes the session tickets _before_ cloning the config. + _, _ = conf.DecryptTicket(nil, tls.ConnectionState{}) + + conf = conf.Clone() + conf.MinVersion = tls.VersionTLS13 + qconf.TLSConfig = conf + + // add callbacks to save transport parameters into the session ticket + origWrapSession := conf.WrapSession + conf.WrapSession = func(cs tls.ConnectionState, state *tls.SessionState) ([]byte, error) { + // Add QUIC session ticket + state.Extra = append(state.Extra, addExtraPrefix(getData())) + + if origWrapSession != nil { + return origWrapSession(cs, state) + } + b, err := conf.EncryptTicket(cs, state) + return b, err + } + origUnwrapSession := conf.UnwrapSession + // UnwrapSession might be called multiple times, as the client can use multiple session tickets. + // However, using 0-RTT is only possible with the first session ticket. + // crypto/tls guarantees that this callback is called in the same order as the session ticket in the ClientHello. + var unwrapCount int + conf.UnwrapSession = func(identity []byte, connState tls.ConnectionState) (*tls.SessionState, error) { + unwrapCount++ + var state *tls.SessionState + var err error + if origUnwrapSession != nil { + state, err = origUnwrapSession(identity, connState) + } else { + state, err = conf.DecryptTicket(identity, connState) + } + if err != nil || state == nil { + return nil, err + } + + extra := findExtraData(state.Extra) + if extra != nil { + state.EarlyData = handleSessionTicket(extra, state.EarlyData && unwrapCount == 1) + } else { + state.EarlyData = false + } + + return state, nil + } +} + +func SetupConfigForClient( + qconf *tls.QUICConfig, + getData func(earlyData bool) []byte, + setData func(data []byte, earlyData bool) (allowEarlyData bool), +) { + conf := qconf.TLSConfig + if conf.ClientSessionCache != nil { + origCache := conf.ClientSessionCache + conf.ClientSessionCache = &clientSessionCache{ + wrapped: origCache, + getData: getData, + setData: setData, + } + } +} + +func ToTLSEncryptionLevel(e protocol.EncryptionLevel) tls.QUICEncryptionLevel { + switch e { + case protocol.EncryptionInitial: + return tls.QUICEncryptionLevelInitial + case protocol.EncryptionHandshake: + return tls.QUICEncryptionLevelHandshake + case protocol.Encryption1RTT: + return tls.QUICEncryptionLevelApplication + case protocol.Encryption0RTT: + return tls.QUICEncryptionLevelEarly + default: + panic(fmt.Sprintf("unexpected encryption level: %s", e)) + } +} + +func FromTLSEncryptionLevel(e tls.QUICEncryptionLevel) protocol.EncryptionLevel { + switch e { + case tls.QUICEncryptionLevelInitial: + return protocol.EncryptionInitial + case tls.QUICEncryptionLevelHandshake: + return protocol.EncryptionHandshake + case tls.QUICEncryptionLevelApplication: + return protocol.Encryption1RTT + case tls.QUICEncryptionLevelEarly: + return protocol.Encryption0RTT + default: + panic(fmt.Sprintf("unexpect encryption level: %s", e)) + } +} + +const extraPrefix = "quic-go1" + +func addExtraPrefix(b []byte) []byte { + return append([]byte(extraPrefix), b...) +} + +func findExtraData(extras [][]byte) []byte { + prefix := []byte(extraPrefix) + for _, extra := range extras { + if len(extra) < len(prefix) || !bytes.Equal(prefix, extra[:len(prefix)]) { + continue + } + return extra[len(prefix):] + } + return nil +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/utils/buffered_write_closer.go b/backend/vendor/github.com/enetx/uquic/internal/utils/buffered_write_closer.go new file mode 100644 index 0000000..b5b9d6f --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/utils/buffered_write_closer.go @@ -0,0 +1,26 @@ +package utils + +import ( + "bufio" + "io" +) + +type bufferedWriteCloser struct { + *bufio.Writer + io.Closer +} + +// NewBufferedWriteCloser creates an io.WriteCloser from a bufio.Writer and an io.Closer +func NewBufferedWriteCloser(writer *bufio.Writer, closer io.Closer) io.WriteCloser { + return &bufferedWriteCloser{ + Writer: writer, + Closer: closer, + } +} + +func (h bufferedWriteCloser) Close() error { + if err := h.Writer.Flush(); err != nil { + return err + } + return h.Closer.Close() +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/utils/byteorder.go b/backend/vendor/github.com/enetx/uquic/internal/utils/byteorder.go new file mode 100644 index 0000000..a9b715e --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/utils/byteorder.go @@ -0,0 +1,21 @@ +package utils + +import ( + "bytes" + "io" +) + +// A ByteOrder specifies how to convert byte sequences into 16-, 32-, or 64-bit unsigned integers. +type ByteOrder interface { + Uint32([]byte) uint32 + Uint24([]byte) uint32 + Uint16([]byte) uint16 + + ReadUint32(io.ByteReader) (uint32, error) + ReadUint24(io.ByteReader) (uint32, error) + ReadUint16(io.ByteReader) (uint16, error) + + WriteUint32(*bytes.Buffer, uint32) + WriteUint24(*bytes.Buffer, uint32) + WriteUint16(*bytes.Buffer, uint16) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/utils/byteorder_big_endian.go b/backend/vendor/github.com/enetx/uquic/internal/utils/byteorder_big_endian.go new file mode 100644 index 0000000..834a711 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/utils/byteorder_big_endian.go @@ -0,0 +1,103 @@ +package utils + +import ( + "bytes" + "encoding/binary" + "io" +) + +// BigEndian is the big-endian implementation of ByteOrder. +var BigEndian ByteOrder = bigEndian{} + +type bigEndian struct{} + +var _ ByteOrder = &bigEndian{} + +// ReadUintN reads N bytes +func (bigEndian) ReadUintN(b io.ByteReader, length uint8) (uint64, error) { + var res uint64 + for i := uint8(0); i < length; i++ { + bt, err := b.ReadByte() + if err != nil { + return 0, err + } + res ^= uint64(bt) << ((length - 1 - i) * 8) + } + return res, nil +} + +// ReadUint32 reads a uint32 +func (bigEndian) ReadUint32(b io.ByteReader) (uint32, error) { + var b1, b2, b3, b4 uint8 + var err error + if b4, err = b.ReadByte(); err != nil { + return 0, err + } + if b3, err = b.ReadByte(); err != nil { + return 0, err + } + if b2, err = b.ReadByte(); err != nil { + return 0, err + } + if b1, err = b.ReadByte(); err != nil { + return 0, err + } + return uint32(b1) + uint32(b2)<<8 + uint32(b3)<<16 + uint32(b4)<<24, nil +} + +// ReadUint24 reads a uint24 +func (bigEndian) ReadUint24(b io.ByteReader) (uint32, error) { + var b1, b2, b3 uint8 + var err error + if b3, err = b.ReadByte(); err != nil { + return 0, err + } + if b2, err = b.ReadByte(); err != nil { + return 0, err + } + if b1, err = b.ReadByte(); err != nil { + return 0, err + } + return uint32(b1) + uint32(b2)<<8 + uint32(b3)<<16, nil +} + +// ReadUint16 reads a uint16 +func (bigEndian) ReadUint16(b io.ByteReader) (uint16, error) { + var b1, b2 uint8 + var err error + if b2, err = b.ReadByte(); err != nil { + return 0, err + } + if b1, err = b.ReadByte(); err != nil { + return 0, err + } + return uint16(b1) + uint16(b2)<<8, nil +} + +func (bigEndian) Uint32(b []byte) uint32 { + return binary.BigEndian.Uint32(b) +} + +func (bigEndian) Uint24(b []byte) uint32 { + _ = b[2] // bounds check hint to compiler; see golang.org/issue/14808 + return uint32(b[2]) | uint32(b[1])<<8 | uint32(b[0])<<16 +} + +func (bigEndian) Uint16(b []byte) uint16 { + return binary.BigEndian.Uint16(b) +} + +// WriteUint32 writes a uint32 +func (bigEndian) WriteUint32(b *bytes.Buffer, i uint32) { + b.Write([]byte{uint8(i >> 24), uint8(i >> 16), uint8(i >> 8), uint8(i)}) +} + +// WriteUint24 writes a uint24 +func (bigEndian) WriteUint24(b *bytes.Buffer, i uint32) { + b.Write([]byte{uint8(i >> 16), uint8(i >> 8), uint8(i)}) +} + +// WriteUint16 writes a uint16 +func (bigEndian) WriteUint16(b *bytes.Buffer, i uint16) { + b.Write([]byte{uint8(i >> 8), uint8(i)}) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/utils/ip.go b/backend/vendor/github.com/enetx/uquic/internal/utils/ip.go new file mode 100644 index 0000000..7ac7ffe --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/utils/ip.go @@ -0,0 +1,10 @@ +package utils + +import "net" + +func IsIPv4(ip net.IP) bool { + // If ip is not an IPv4 address, To4 returns nil. + // Note that there might be some corner cases, where this is not correct. + // See https://stackoverflow.com/questions/22751035/golang-distinguish-ipv4-ipv6. + return ip.To4() != nil +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/utils/linkedlist/README.md b/backend/vendor/github.com/enetx/uquic/internal/utils/linkedlist/README.md new file mode 100644 index 0000000..66482f4 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/utils/linkedlist/README.md @@ -0,0 +1,6 @@ +# Usage + +This is the Go standard library implementation of a linked list +(https://golang.org/src/container/list/list.go), with the following modifications: +* it uses Go generics +* it allows passing in a `sync.Pool` (via the `NewWithPool` constructor) to reduce allocations of `Element` structs diff --git a/backend/vendor/github.com/enetx/uquic/internal/utils/linkedlist/linkedlist.go b/backend/vendor/github.com/enetx/uquic/internal/utils/linkedlist/linkedlist.go new file mode 100644 index 0000000..804a344 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/utils/linkedlist/linkedlist.go @@ -0,0 +1,264 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package list implements a doubly linked list. +// +// To iterate over a list (where l is a *List[T]): +// +// for e := l.Front(); e != nil; e = e.Next() { +// // do something with e.Value +// } +package list + +import "sync" + +func NewPool[T any]() *sync.Pool { + return &sync.Pool{New: func() any { return &Element[T]{} }} +} + +// Element is an element of a linked list. +type Element[T any] struct { + // Next and previous pointers in the doubly-linked list of elements. + // To simplify the implementation, internally a list l is implemented + // as a ring, such that &l.root is both the next element of the last + // list element (l.Back()) and the previous element of the first list + // element (l.Front()). + next, prev *Element[T] + + // The list to which this element belongs. + list *List[T] + + // The value stored with this element. + Value T +} + +// Next returns the next list element or nil. +func (e *Element[T]) Next() *Element[T] { + if p := e.next; e.list != nil && p != &e.list.root { + return p + } + return nil +} + +// Prev returns the previous list element or nil. +func (e *Element[T]) Prev() *Element[T] { + if p := e.prev; e.list != nil && p != &e.list.root { + return p + } + return nil +} + +func (e *Element[T]) List() *List[T] { + return e.list +} + +// List represents a doubly linked list. +// The zero value for List is an empty list ready to use. +type List[T any] struct { + root Element[T] // sentinel list element, only &root, root.prev, and root.next are used + len int // current list length excluding (this) sentinel element + + pool *sync.Pool +} + +// Init initializes or clears list l. +func (l *List[T]) Init() *List[T] { + l.root.next = &l.root + l.root.prev = &l.root + l.len = 0 + return l +} + +// New returns an initialized list. +func New[T any]() *List[T] { return new(List[T]).Init() } + +// NewWithPool returns an initialized list, using a sync.Pool for list elements. +func NewWithPool[T any](pool *sync.Pool) *List[T] { + l := &List[T]{pool: pool} + return l.Init() +} + +// Len returns the number of elements of list l. +// The complexity is O(1). +func (l *List[T]) Len() int { return l.len } + +// Front returns the first element of list l or nil if the list is empty. +func (l *List[T]) Front() *Element[T] { + if l.len == 0 { + return nil + } + return l.root.next +} + +// Back returns the last element of list l or nil if the list is empty. +func (l *List[T]) Back() *Element[T] { + if l.len == 0 { + return nil + } + return l.root.prev +} + +// lazyInit lazily initializes a zero List value. +func (l *List[T]) lazyInit() { + if l.root.next == nil { + l.Init() + } +} + +// insert inserts e after at, increments l.len, and returns e. +func (l *List[T]) insert(e, at *Element[T]) *Element[T] { + e.prev = at + e.next = at.next + e.prev.next = e + e.next.prev = e + e.list = l + l.len++ + return e +} + +// insertValue is a convenience wrapper for insert(&Element{Value: v}, at). +func (l *List[T]) insertValue(v T, at *Element[T]) *Element[T] { + var e *Element[T] + if l.pool != nil { + e = l.pool.Get().(*Element[T]) + } else { + e = &Element[T]{} + } + e.Value = v + return l.insert(e, at) +} + +// remove removes e from its list, decrements l.len +func (l *List[T]) remove(e *Element[T]) { + e.prev.next = e.next + e.next.prev = e.prev + e.next = nil // avoid memory leaks + e.prev = nil // avoid memory leaks + e.list = nil + if l.pool != nil { + l.pool.Put(e) + } + l.len-- +} + +// move moves e to next to at. +func (l *List[T]) move(e, at *Element[T]) { + if e == at { + return + } + e.prev.next = e.next + e.next.prev = e.prev + + e.prev = at + e.next = at.next + e.prev.next = e + e.next.prev = e +} + +// Remove removes e from l if e is an element of list l. +// It returns the element value e.Value. +// The element must not be nil. +func (l *List[T]) Remove(e *Element[T]) T { + v := e.Value + if e.list == l { + // if e.list == l, l must have been initialized when e was inserted + // in l or l == nil (e is a zero Element) and l.remove will crash + l.remove(e) + } + return v +} + +// PushFront inserts a new element e with value v at the front of list l and returns e. +func (l *List[T]) PushFront(v T) *Element[T] { + l.lazyInit() + return l.insertValue(v, &l.root) +} + +// PushBack inserts a new element e with value v at the back of list l and returns e. +func (l *List[T]) PushBack(v T) *Element[T] { + l.lazyInit() + return l.insertValue(v, l.root.prev) +} + +// InsertBefore inserts a new element e with value v immediately before mark and returns e. +// If mark is not an element of l, the list is not modified. +// The mark must not be nil. +func (l *List[T]) InsertBefore(v T, mark *Element[T]) *Element[T] { + if mark.list != l { + return nil + } + // see comment in List.Remove about initialization of l + return l.insertValue(v, mark.prev) +} + +// InsertAfter inserts a new element e with value v immediately after mark and returns e. +// If mark is not an element of l, the list is not modified. +// The mark must not be nil. +func (l *List[T]) InsertAfter(v T, mark *Element[T]) *Element[T] { + if mark.list != l { + return nil + } + // see comment in List.Remove about initialization of l + return l.insertValue(v, mark) +} + +// MoveToFront moves element e to the front of list l. +// If e is not an element of l, the list is not modified. +// The element must not be nil. +func (l *List[T]) MoveToFront(e *Element[T]) { + if e.list != l || l.root.next == e { + return + } + // see comment in List.Remove about initialization of l + l.move(e, &l.root) +} + +// MoveToBack moves element e to the back of list l. +// If e is not an element of l, the list is not modified. +// The element must not be nil. +func (l *List[T]) MoveToBack(e *Element[T]) { + if e.list != l || l.root.prev == e { + return + } + // see comment in List.Remove about initialization of l + l.move(e, l.root.prev) +} + +// MoveBefore moves element e to its new position before mark. +// If e or mark is not an element of l, or e == mark, the list is not modified. +// The element and mark must not be nil. +func (l *List[T]) MoveBefore(e, mark *Element[T]) { + if e.list != l || e == mark || mark.list != l { + return + } + l.move(e, mark.prev) +} + +// MoveAfter moves element e to its new position after mark. +// If e or mark is not an element of l, or e == mark, the list is not modified. +// The element and mark must not be nil. +func (l *List[T]) MoveAfter(e, mark *Element[T]) { + if e.list != l || e == mark || mark.list != l { + return + } + l.move(e, mark) +} + +// PushBackList inserts a copy of another list at the back of list l. +// The lists l and other may be the same. They must not be nil. +func (l *List[T]) PushBackList(other *List[T]) { + l.lazyInit() + for i, e := other.Len(), other.Front(); i > 0; i, e = i-1, e.Next() { + l.insertValue(e.Value, l.root.prev) + } +} + +// PushFrontList inserts a copy of another list at the front of list l. +// The lists l and other may be the same. They must not be nil. +func (l *List[T]) PushFrontList(other *List[T]) { + l.lazyInit() + for i, e := other.Len(), other.Back(); i > 0; i, e = i-1, e.Prev() { + l.insertValue(e.Value, &l.root) + } +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/utils/log.go b/backend/vendor/github.com/enetx/uquic/internal/utils/log.go new file mode 100644 index 0000000..d00b600 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/utils/log.go @@ -0,0 +1,131 @@ +package utils + +import ( + "fmt" + "log" + "os" + "strings" + "time" +) + +// LogLevel of quic-go +type LogLevel uint8 + +const ( + // LogLevelNothing disables + LogLevelNothing LogLevel = iota + // LogLevelError enables err logs + LogLevelError + // LogLevelInfo enables info logs (e.g. packets) + LogLevelInfo + // LogLevelDebug enables debug logs (e.g. packet contents) + LogLevelDebug +) + +const logEnv = "QUIC_GO_LOG_LEVEL" + +// A Logger logs. +type Logger interface { + SetLogLevel(LogLevel) + SetLogTimeFormat(format string) + WithPrefix(prefix string) Logger + Debug() bool + + Errorf(format string, args ...interface{}) + Infof(format string, args ...interface{}) + Debugf(format string, args ...interface{}) +} + +// DefaultLogger is used by quic-go for logging. +var DefaultLogger Logger + +type defaultLogger struct { + prefix string + + logLevel LogLevel + timeFormat string +} + +var _ Logger = &defaultLogger{} + +// SetLogLevel sets the log level +func (l *defaultLogger) SetLogLevel(level LogLevel) { + l.logLevel = level +} + +// SetLogTimeFormat sets the format of the timestamp +// an empty string disables the logging of timestamps +func (l *defaultLogger) SetLogTimeFormat(format string) { + log.SetFlags(0) // disable timestamp logging done by the log package + l.timeFormat = format +} + +// Debugf logs something +func (l *defaultLogger) Debugf(format string, args ...interface{}) { + if l.logLevel == LogLevelDebug { + l.logMessage(format, args...) + } +} + +// Infof logs something +func (l *defaultLogger) Infof(format string, args ...interface{}) { + if l.logLevel >= LogLevelInfo { + l.logMessage(format, args...) + } +} + +// Errorf logs something +func (l *defaultLogger) Errorf(format string, args ...interface{}) { + if l.logLevel >= LogLevelError { + l.logMessage(format, args...) + } +} + +func (l *defaultLogger) logMessage(format string, args ...interface{}) { + var pre string + + if len(l.timeFormat) > 0 { + pre = time.Now().Format(l.timeFormat) + " " + } + if len(l.prefix) > 0 { + pre += l.prefix + " " + } + log.Printf(pre+format, args...) +} + +func (l *defaultLogger) WithPrefix(prefix string) Logger { + if len(l.prefix) > 0 { + prefix = l.prefix + " " + prefix + } + return &defaultLogger{ + logLevel: l.logLevel, + timeFormat: l.timeFormat, + prefix: prefix, + } +} + +// Debug returns true if the log level is LogLevelDebug +func (l *defaultLogger) Debug() bool { + return l.logLevel == LogLevelDebug +} + +func init() { + DefaultLogger = &defaultLogger{} + DefaultLogger.SetLogLevel(readLoggingEnv()) +} + +func readLoggingEnv() LogLevel { + switch strings.ToLower(os.Getenv(logEnv)) { + case "": + return LogLevelNothing + case "debug": + return LogLevelDebug + case "info": + return LogLevelInfo + case "error": + return LogLevelError + default: + fmt.Fprintln(os.Stderr, "invalid quic-go log level, see https://github.com/enetx/uquic/wiki/Logging") + return LogLevelNothing + } +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/utils/minmax.go b/backend/vendor/github.com/enetx/uquic/internal/utils/minmax.go new file mode 100644 index 0000000..03a9c9a --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/utils/minmax.go @@ -0,0 +1,36 @@ +package utils + +import ( + "math" + "time" +) + +// InfDuration is a duration of infinite length +const InfDuration = time.Duration(math.MaxInt64) + +// MinNonZeroDuration return the minimum duration that's not zero. +func MinNonZeroDuration(a, b time.Duration) time.Duration { + if a == 0 { + return b + } + if b == 0 { + return a + } + return min(a, b) +} + +// MinTime returns the earlier time +func MinTime(a, b time.Time) time.Time { + if a.After(b) { + return b + } + return a +} + +// MaxTime returns the later time +func MaxTime(a, b time.Time) time.Time { + if a.After(b) { + return a + } + return b +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/utils/rand.go b/backend/vendor/github.com/enetx/uquic/internal/utils/rand.go new file mode 100644 index 0000000..3006914 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/utils/rand.go @@ -0,0 +1,29 @@ +package utils + +import ( + "crypto/rand" + "encoding/binary" +) + +// Rand is a wrapper around crypto/rand that adds some convenience functions known from math/rand. +type Rand struct { + buf [4]byte +} + +func (r *Rand) Int31() int32 { + rand.Read(r.buf[:]) + return int32(binary.BigEndian.Uint32(r.buf[:]) & ^uint32(1<<31)) +} + +// copied from the standard library math/rand implementation of Int63n +func (r *Rand) Int31n(n int32) int32 { + if n&(n-1) == 0 { // n is power of two, can mask + return r.Int31() & (n - 1) + } + max := int32((1 << 31) - 1 - (1<<31)%uint32(n)) + v := r.Int31() + for v > max { + v = r.Int31() + } + return v % n +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/utils/ringbuffer/ringbuffer.go b/backend/vendor/github.com/enetx/uquic/internal/utils/ringbuffer/ringbuffer.go new file mode 100644 index 0000000..a467cb7 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/utils/ringbuffer/ringbuffer.go @@ -0,0 +1,96 @@ +package ringbuffer + +// A RingBuffer is a ring buffer. +// It acts as a heap that doesn't cause any allocations. +type RingBuffer[T any] struct { + ring []T + headPos, tailPos int + full bool +} + +// Init preallocates a buffer with a certain size. +func (r *RingBuffer[T]) Init(size int) { + r.ring = make([]T, size) +} + +// Len returns the number of elements in the ring buffer. +func (r *RingBuffer[T]) Len() int { + if r.full { + return len(r.ring) + } + if r.tailPos >= r.headPos { + return r.tailPos - r.headPos + } + return r.tailPos - r.headPos + len(r.ring) +} + +// Empty says if the ring buffer is empty. +func (r *RingBuffer[T]) Empty() bool { + return !r.full && r.headPos == r.tailPos +} + +// PushBack adds a new element. +// If the ring buffer is full, its capacity is increased first. +func (r *RingBuffer[T]) PushBack(t T) { + if r.full || len(r.ring) == 0 { + r.grow() + } + r.ring[r.tailPos] = t + r.tailPos++ + if r.tailPos == len(r.ring) { + r.tailPos = 0 + } + if r.tailPos == r.headPos { + r.full = true + } +} + +// PopFront returns the next element. +// It must not be called when the buffer is empty, that means that +// callers might need to check if there are elements in the buffer first. +func (r *RingBuffer[T]) PopFront() T { + if r.Empty() { + panic("github.com/enetx/uquic/internal/utils/ringbuffer: pop from an empty queue") + } + r.full = false + t := r.ring[r.headPos] + r.ring[r.headPos] = *new(T) + r.headPos++ + if r.headPos == len(r.ring) { + r.headPos = 0 + } + return t +} + +// PeekFront returns the next element. +// It must not be called when the buffer is empty, that means that +// callers might need to check if there are elements in the buffer first. +func (r *RingBuffer[T]) PeekFront() T { + if r.Empty() { + panic("github.com/enetx/uquic/internal/utils/ringbuffer: peek from an empty queue") + } + return r.ring[r.headPos] +} + +// Grow the maximum size of the queue. +// This method assume the queue is full. +func (r *RingBuffer[T]) grow() { + oldRing := r.ring + newSize := len(oldRing) * 2 + if newSize == 0 { + newSize = 1 + } + r.ring = make([]T, newSize) + headLen := copy(r.ring, oldRing[r.headPos:]) + copy(r.ring[headLen:], oldRing[:r.headPos]) + r.headPos, r.tailPos, r.full = 0, len(oldRing), false +} + +// Clear removes all elements. +func (r *RingBuffer[T]) Clear() { + var zeroValue T + for i := range r.ring { + r.ring[i] = zeroValue + } + r.headPos, r.tailPos, r.full = 0, 0, false +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/utils/rtt_stats.go b/backend/vendor/github.com/enetx/uquic/internal/utils/rtt_stats.go new file mode 100644 index 0000000..ea3d571 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/utils/rtt_stats.go @@ -0,0 +1,131 @@ +package utils + +import ( + "time" + + "github.com/enetx/uquic/internal/protocol" +) + +const ( + rttAlpha = 0.125 + oneMinusAlpha = 1 - rttAlpha + rttBeta = 0.25 + oneMinusBeta = 1 - rttBeta + // The default RTT used before an RTT sample is taken. + defaultInitialRTT = 100 * time.Millisecond +) + +// RTTStats provides round-trip statistics +type RTTStats struct { + hasMeasurement bool + + minRTT time.Duration + latestRTT time.Duration + smoothedRTT time.Duration + meanDeviation time.Duration + + maxAckDelay time.Duration +} + +// NewRTTStats makes a properly initialized RTTStats object +func NewRTTStats() *RTTStats { + return &RTTStats{} +} + +// MinRTT Returns the minRTT for the entire connection. +// May return Zero if no valid updates have occurred. +func (r *RTTStats) MinRTT() time.Duration { return r.minRTT } + +// LatestRTT returns the most recent rtt measurement. +// May return Zero if no valid updates have occurred. +func (r *RTTStats) LatestRTT() time.Duration { return r.latestRTT } + +// SmoothedRTT returns the smoothed RTT for the connection. +// May return Zero if no valid updates have occurred. +func (r *RTTStats) SmoothedRTT() time.Duration { return r.smoothedRTT } + +// MeanDeviation gets the mean deviation +func (r *RTTStats) MeanDeviation() time.Duration { return r.meanDeviation } + +// MaxAckDelay gets the max_ack_delay advertised by the peer +func (r *RTTStats) MaxAckDelay() time.Duration { return r.maxAckDelay } + +// PTO gets the probe timeout duration. +func (r *RTTStats) PTO(includeMaxAckDelay bool) time.Duration { + if r.SmoothedRTT() == 0 { + return 2 * defaultInitialRTT + } + pto := r.SmoothedRTT() + max(4*r.MeanDeviation(), protocol.TimerGranularity) + if includeMaxAckDelay { + pto += r.MaxAckDelay() + } + return pto +} + +// UpdateRTT updates the RTT based on a new sample. +func (r *RTTStats) UpdateRTT(sendDelta, ackDelay time.Duration, now time.Time) { + if sendDelta == InfDuration || sendDelta <= 0 { + return + } + + // Update r.minRTT first. r.minRTT does not use an rttSample corrected for + // ackDelay but the raw observed sendDelta, since poor clock granularity at + // the client may cause a high ackDelay to result in underestimation of the + // r.minRTT. + if r.minRTT == 0 || r.minRTT > sendDelta { + r.minRTT = sendDelta + } + + // Correct for ackDelay if information received from the peer results in a + // an RTT sample at least as large as minRTT. Otherwise, only use the + // sendDelta. + sample := sendDelta + if sample-r.minRTT >= ackDelay { + sample -= ackDelay + } + r.latestRTT = sample + // First time call. + if !r.hasMeasurement { + r.hasMeasurement = true + r.smoothedRTT = sample + r.meanDeviation = sample / 2 + } else { + r.meanDeviation = time.Duration(oneMinusBeta*float32(r.meanDeviation/time.Microsecond)+rttBeta*float32((r.smoothedRTT-sample).Abs()/time.Microsecond)) * time.Microsecond + r.smoothedRTT = time.Duration((float32(r.smoothedRTT/time.Microsecond)*oneMinusAlpha)+(float32(sample/time.Microsecond)*rttAlpha)) * time.Microsecond + } +} + +// SetMaxAckDelay sets the max_ack_delay +func (r *RTTStats) SetMaxAckDelay(mad time.Duration) { + r.maxAckDelay = mad +} + +// SetInitialRTT sets the initial RTT. +// It is used during the 0-RTT handshake when restoring the RTT stats from the session state. +func (r *RTTStats) SetInitialRTT(t time.Duration) { + // On the server side, by the time we get to process the session ticket, + // we might already have obtained an RTT measurement. + // This can happen if we received the ClientHello in multiple pieces, and one of those pieces was lost. + // Discard the restored value. A fresh measurement is always better. + if r.hasMeasurement { + return + } + r.smoothedRTT = t + r.latestRTT = t +} + +// OnConnectionMigration is called when connection migrates and rtt measurement needs to be reset. +func (r *RTTStats) OnConnectionMigration() { + r.latestRTT = 0 + r.minRTT = 0 + r.smoothedRTT = 0 + r.meanDeviation = 0 +} + +// ExpireSmoothedMetrics causes the smoothed_rtt to be increased to the latest_rtt if the latest_rtt +// is larger. The mean deviation is increased to the most recent deviation if +// it's larger. +func (r *RTTStats) ExpireSmoothedMetrics() { + r.meanDeviation = max(r.meanDeviation, (r.smoothedRTT - r.latestRTT).Abs()) + r.smoothedRTT = max(r.smoothedRTT, r.latestRTT) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/utils/timer.go b/backend/vendor/github.com/enetx/uquic/internal/utils/timer.go new file mode 100644 index 0000000..361106c --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/utils/timer.go @@ -0,0 +1,57 @@ +package utils + +import ( + "math" + "time" +) + +// A Timer wrapper that behaves correctly when resetting +type Timer struct { + t *time.Timer + read bool + deadline time.Time +} + +// NewTimer creates a new timer that is not set +func NewTimer() *Timer { + return &Timer{t: time.NewTimer(time.Duration(math.MaxInt64))} +} + +// Chan returns the channel of the wrapped timer +func (t *Timer) Chan() <-chan time.Time { + return t.t.C +} + +// Reset the timer, no matter whether the value was read or not +func (t *Timer) Reset(deadline time.Time) { + if deadline.Equal(t.deadline) && !t.read { + // No need to reset the timer + return + } + + // We need to drain the timer if the value from its channel was not read yet. + // See https://groups.google.com/forum/#!topic/golang-dev/c9UUfASVPoU + if !t.t.Stop() && !t.read { + <-t.t.C + } + if !deadline.IsZero() { + t.t.Reset(time.Until(deadline)) + } + + t.read = false + t.deadline = deadline +} + +// SetRead should be called after the value from the chan was read +func (t *Timer) SetRead() { + t.read = true +} + +func (t *Timer) Deadline() time.Time { + return t.deadline +} + +// Stop stops the timer +func (t *Timer) Stop() { + t.t.Stop() +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/ack_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/ack_frame.go new file mode 100644 index 0000000..80765df --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/ack_frame.go @@ -0,0 +1,266 @@ +package wire + +import ( + "bytes" + "errors" + "sort" + "time" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/quicvarint" +) + +var errInvalidAckRanges = errors.New("AckFrame: ACK frame contains invalid ACK ranges") + +// An AckFrame is an ACK frame +type AckFrame struct { + AckRanges []AckRange // has to be ordered. The highest ACK range goes first, the lowest ACK range goes last + DelayTime time.Duration + + ECT0, ECT1, ECNCE uint64 +} + +// parseAckFrame reads an ACK frame +func parseAckFrame(frame *AckFrame, r *bytes.Reader, typ uint64, ackDelayExponent uint8, _ protocol.Version) error { + ecn := typ == ackECNFrameType + + la, err := quicvarint.Read(r) + if err != nil { + return err + } + largestAcked := protocol.PacketNumber(la) + delay, err := quicvarint.Read(r) + if err != nil { + return err + } + + delayTime := time.Duration(delay*1< largestAcked { + return errors.New("invalid first ACK range") + } + smallest := largestAcked - ackBlock + frame.AckRanges = append(frame.AckRanges, AckRange{Smallest: smallest, Largest: largestAcked}) + + // read all the other ACK ranges + for i := uint64(0); i < numBlocks; i++ { + g, err := quicvarint.Read(r) + if err != nil { + return err + } + gap := protocol.PacketNumber(g) + if smallest < gap+2 { + return errInvalidAckRanges + } + largest := smallest - gap - 2 + + ab, err := quicvarint.Read(r) + if err != nil { + return err + } + ackBlock := protocol.PacketNumber(ab) + + if ackBlock > largest { + return errInvalidAckRanges + } + smallest = largest - ackBlock + frame.AckRanges = append(frame.AckRanges, AckRange{Smallest: smallest, Largest: largest}) + } + + if !frame.validateAckRanges() { + return errInvalidAckRanges + } + + if ecn { + ect0, err := quicvarint.Read(r) + if err != nil { + return err + } + frame.ECT0 = ect0 + ect1, err := quicvarint.Read(r) + if err != nil { + return err + } + frame.ECT1 = ect1 + ecnce, err := quicvarint.Read(r) + if err != nil { + return err + } + frame.ECNCE = ecnce + } + + return nil +} + +// Append appends an ACK frame. +func (f *AckFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + hasECN := f.ECT0 > 0 || f.ECT1 > 0 || f.ECNCE > 0 + if hasECN { + b = append(b, ackECNFrameType) + } else { + b = append(b, ackFrameType) + } + b = quicvarint.Append(b, uint64(f.LargestAcked())) + b = quicvarint.Append(b, encodeAckDelay(f.DelayTime)) + + numRanges := f.numEncodableAckRanges() + b = quicvarint.Append(b, uint64(numRanges-1)) + + // write the first range + _, firstRange := f.encodeAckRange(0) + b = quicvarint.Append(b, firstRange) + + // write all the other range + for i := 1; i < numRanges; i++ { + gap, len := f.encodeAckRange(i) + b = quicvarint.Append(b, gap) + b = quicvarint.Append(b, len) + } + + if hasECN { + b = quicvarint.Append(b, f.ECT0) + b = quicvarint.Append(b, f.ECT1) + b = quicvarint.Append(b, f.ECNCE) + } + return b, nil +} + +// Length of a written frame +func (f *AckFrame) Length(_ protocol.Version) protocol.ByteCount { + largestAcked := f.AckRanges[0].Largest + numRanges := f.numEncodableAckRanges() + + length := 1 + quicvarint.Len(uint64(largestAcked)) + quicvarint.Len(encodeAckDelay(f.DelayTime)) + + length += quicvarint.Len(uint64(numRanges - 1)) + lowestInFirstRange := f.AckRanges[0].Smallest + length += quicvarint.Len(uint64(largestAcked - lowestInFirstRange)) + + for i := 1; i < numRanges; i++ { + gap, len := f.encodeAckRange(i) + length += quicvarint.Len(gap) + length += quicvarint.Len(len) + } + if f.ECT0 > 0 || f.ECT1 > 0 || f.ECNCE > 0 { + length += quicvarint.Len(f.ECT0) + length += quicvarint.Len(f.ECT1) + length += quicvarint.Len(f.ECNCE) + } + return length +} + +// gets the number of ACK ranges that can be encoded +// such that the resulting frame is smaller than the maximum ACK frame size +func (f *AckFrame) numEncodableAckRanges() int { + length := 1 + quicvarint.Len(uint64(f.LargestAcked())) + quicvarint.Len(encodeAckDelay(f.DelayTime)) + length += 2 // assume that the number of ranges will consume 2 bytes + for i := 1; i < len(f.AckRanges); i++ { + gap, len := f.encodeAckRange(i) + rangeLen := quicvarint.Len(gap) + quicvarint.Len(len) + if length+rangeLen > protocol.MaxAckFrameSize { + // Writing range i would exceed the MaxAckFrameSize. + // So encode one range less than that. + return i - 1 + } + length += rangeLen + } + return len(f.AckRanges) +} + +func (f *AckFrame) encodeAckRange(i int) (uint64 /* gap */, uint64 /* length */) { + if i == 0 { + return 0, uint64(f.AckRanges[0].Largest - f.AckRanges[0].Smallest) + } + return uint64(f.AckRanges[i-1].Smallest - f.AckRanges[i].Largest - 2), + uint64(f.AckRanges[i].Largest - f.AckRanges[i].Smallest) +} + +// HasMissingRanges returns if this frame reports any missing packets +func (f *AckFrame) HasMissingRanges() bool { + return len(f.AckRanges) > 1 +} + +func (f *AckFrame) validateAckRanges() bool { + if len(f.AckRanges) == 0 { + return false + } + + // check the validity of every single ACK range + for _, ackRange := range f.AckRanges { + if ackRange.Smallest > ackRange.Largest { + return false + } + } + + // check the consistency for ACK with multiple NACK ranges + for i, ackRange := range f.AckRanges { + if i == 0 { + continue + } + lastAckRange := f.AckRanges[i-1] + if lastAckRange.Smallest <= ackRange.Smallest { + return false + } + if lastAckRange.Smallest <= ackRange.Largest+1 { + return false + } + } + + return true +} + +// LargestAcked is the largest acked packet number +func (f *AckFrame) LargestAcked() protocol.PacketNumber { + return f.AckRanges[0].Largest +} + +// LowestAcked is the lowest acked packet number +func (f *AckFrame) LowestAcked() protocol.PacketNumber { + return f.AckRanges[len(f.AckRanges)-1].Smallest +} + +// AcksPacket determines if this ACK frame acks a certain packet number +func (f *AckFrame) AcksPacket(p protocol.PacketNumber) bool { + if p < f.LowestAcked() || p > f.LargestAcked() { + return false + } + + i := sort.Search(len(f.AckRanges), func(i int) bool { + return p >= f.AckRanges[i].Smallest + }) + // i will always be < len(f.AckRanges), since we checked above that p is not bigger than the largest acked + return p <= f.AckRanges[i].Largest +} + +func (f *AckFrame) Reset() { + f.DelayTime = 0 + f.ECT0 = 0 + f.ECT1 = 0 + f.ECNCE = 0 + for _, r := range f.AckRanges { + r.Largest = 0 + r.Smallest = 0 + } + f.AckRanges = f.AckRanges[:0] +} + +func encodeAckDelay(delay time.Duration) uint64 { + return uint64(delay.Nanoseconds() / (1000 * (1 << protocol.AckDelayExponent))) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/ack_range.go b/backend/vendor/github.com/enetx/uquic/internal/wire/ack_range.go new file mode 100644 index 0000000..3cfb896 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/ack_range.go @@ -0,0 +1,14 @@ +package wire + +import "github.com/enetx/uquic/internal/protocol" + +// AckRange is an ACK range +type AckRange struct { + Smallest protocol.PacketNumber + Largest protocol.PacketNumber +} + +// Len returns the number of packets contained in this ACK range +func (r AckRange) Len() protocol.PacketNumber { + return r.Largest - r.Smallest + 1 +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/connection_close_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/connection_close_frame.go new file mode 100644 index 0000000..626d345 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/connection_close_frame.go @@ -0,0 +1,78 @@ +package wire + +import ( + "bytes" + "io" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/quicvarint" +) + +// A ConnectionCloseFrame is a CONNECTION_CLOSE frame +type ConnectionCloseFrame struct { + IsApplicationError bool + ErrorCode uint64 + FrameType uint64 + ReasonPhrase string +} + +func parseConnectionCloseFrame(r *bytes.Reader, typ uint64, _ protocol.Version) (*ConnectionCloseFrame, error) { + f := &ConnectionCloseFrame{IsApplicationError: typ == applicationCloseFrameType} + ec, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + f.ErrorCode = ec + // read the Frame Type, if this is not an application error + if !f.IsApplicationError { + ft, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + f.FrameType = ft + } + var reasonPhraseLen uint64 + reasonPhraseLen, err = quicvarint.Read(r) + if err != nil { + return nil, err + } + // shortcut to prevent the unnecessary allocation of dataLen bytes + // if the dataLen is larger than the remaining length of the packet + // reading the whole reason phrase would result in EOF when attempting to READ + if int(reasonPhraseLen) > r.Len() { + return nil, io.EOF + } + + reasonPhrase := make([]byte, reasonPhraseLen) + if _, err := io.ReadFull(r, reasonPhrase); err != nil { + // this should never happen, since we already checked the reasonPhraseLen earlier + return nil, err + } + f.ReasonPhrase = string(reasonPhrase) + return f, nil +} + +// Length of a written frame +func (f *ConnectionCloseFrame) Length(protocol.Version) protocol.ByteCount { + length := 1 + quicvarint.Len(f.ErrorCode) + quicvarint.Len(uint64(len(f.ReasonPhrase))) + protocol.ByteCount(len(f.ReasonPhrase)) + if !f.IsApplicationError { + length += quicvarint.Len(f.FrameType) // for the frame type + } + return length +} + +func (f *ConnectionCloseFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + if f.IsApplicationError { + b = append(b, applicationCloseFrameType) + } else { + b = append(b, connectionCloseFrameType) + } + + b = quicvarint.Append(b, f.ErrorCode) + if !f.IsApplicationError { + b = quicvarint.Append(b, f.FrameType) + } + b = quicvarint.Append(b, uint64(len(f.ReasonPhrase))) + b = append(b, []byte(f.ReasonPhrase)...) + return b, nil +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/crypto_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/crypto_frame.go new file mode 100644 index 0000000..59e26ea --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/crypto_frame.go @@ -0,0 +1,98 @@ +package wire + +import ( + "bytes" + "io" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/quicvarint" +) + +// A CryptoFrame is a CRYPTO frame +type CryptoFrame struct { + Offset protocol.ByteCount + Data []byte +} + +func parseCryptoFrame(r *bytes.Reader, _ protocol.Version) (*CryptoFrame, error) { + frame := &CryptoFrame{} + offset, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + frame.Offset = protocol.ByteCount(offset) + dataLen, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + if dataLen > uint64(r.Len()) { + return nil, io.EOF + } + if dataLen != 0 { + frame.Data = make([]byte, dataLen) + if _, err := io.ReadFull(r, frame.Data); err != nil { + // this should never happen, since we already checked the dataLen earlier + return nil, err + } + } + return frame, nil +} + +func (f *CryptoFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + b = append(b, cryptoFrameType) + b = quicvarint.Append(b, uint64(f.Offset)) + b = quicvarint.Append(b, uint64(len(f.Data))) + b = append(b, f.Data...) + return b, nil +} + +// Length of a written frame +func (f *CryptoFrame) Length(_ protocol.Version) protocol.ByteCount { + return 1 + quicvarint.Len(uint64(f.Offset)) + quicvarint.Len(uint64(len(f.Data))) + protocol.ByteCount(len(f.Data)) +} + +// MaxDataLen returns the maximum data length +func (f *CryptoFrame) MaxDataLen(maxSize protocol.ByteCount) protocol.ByteCount { + // pretend that the data size will be 1 bytes + // if it turns out that varint encoding the length will consume 2 bytes, we need to adjust the data length afterwards + headerLen := 1 + quicvarint.Len(uint64(f.Offset)) + 1 + if headerLen > maxSize { + return 0 + } + maxDataLen := maxSize - headerLen + if quicvarint.Len(uint64(maxDataLen)) != 1 { + maxDataLen-- + } + return maxDataLen +} + +// MaybeSplitOffFrame splits a frame such that it is not bigger than n bytes. +// It returns if the frame was actually split. +// The frame might not be split if: +// * the size is large enough to fit the whole frame +// * the size is too small to fit even a 1-byte frame. In that case, the frame returned is nil. +func (f *CryptoFrame) MaybeSplitOffFrame(maxSize protocol.ByteCount, version protocol.Version) (*CryptoFrame, bool /* was splitting required */) { + if f.Length(version) <= maxSize { + return nil, false + } + + n := f.MaxDataLen(maxSize) + if n == 0 { + return nil, true + } + + newLen := protocol.ByteCount(len(f.Data)) - n + + new := &CryptoFrame{} + new.Offset = f.Offset + new.Data = make([]byte, newLen) + + // swap the data slices + new.Data, f.Data = f.Data, new.Data + + copy(f.Data, new.Data[n:]) + new.Data = new.Data[:n] + f.Offset += n + + return new, true +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/data_blocked_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/data_blocked_frame.go new file mode 100644 index 0000000..6a0d213 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/data_blocked_frame.go @@ -0,0 +1,31 @@ +package wire + +import ( + "bytes" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/quicvarint" +) + +// A DataBlockedFrame is a DATA_BLOCKED frame +type DataBlockedFrame struct { + MaximumData protocol.ByteCount +} + +func parseDataBlockedFrame(r *bytes.Reader, _ protocol.Version) (*DataBlockedFrame, error) { + offset, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + return &DataBlockedFrame{MaximumData: protocol.ByteCount(offset)}, nil +} + +func (f *DataBlockedFrame) Append(b []byte, version protocol.Version) ([]byte, error) { + b = append(b, dataBlockedFrameType) + return quicvarint.Append(b, uint64(f.MaximumData)), nil +} + +// Length of a written frame +func (f *DataBlockedFrame) Length(version protocol.Version) protocol.ByteCount { + return 1 + quicvarint.Len(uint64(f.MaximumData)) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/datagram_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/datagram_frame.go new file mode 100644 index 0000000..17fa163 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/datagram_frame.go @@ -0,0 +1,86 @@ +package wire + +import ( + "bytes" + "io" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/quicvarint" +) + +// MaxDatagramSize is the maximum size of a DATAGRAM frame (RFC 9221). +// By setting it to a large value, we allow all datagrams that fit into a QUIC packet. +// The value is chosen such that it can still be encoded as a 2 byte varint. +// This is a var and not a const so it can be set in tests. +var MaxDatagramSize protocol.ByteCount = 16383 + +// A DatagramFrame is a DATAGRAM frame +type DatagramFrame struct { + DataLenPresent bool + Data []byte +} + +func parseDatagramFrame(r *bytes.Reader, typ uint64, _ protocol.Version) (*DatagramFrame, error) { + f := &DatagramFrame{} + f.DataLenPresent = typ&0x1 > 0 + + var length uint64 + if f.DataLenPresent { + var err error + len, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + if len > uint64(r.Len()) { + return nil, io.EOF + } + length = len + } else { + length = uint64(r.Len()) + } + f.Data = make([]byte, length) + if _, err := io.ReadFull(r, f.Data); err != nil { + return nil, err + } + return f, nil +} + +func (f *DatagramFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + typ := uint8(0x30) + if f.DataLenPresent { + typ ^= 0b1 + } + b = append(b, typ) + if f.DataLenPresent { + b = quicvarint.Append(b, uint64(len(f.Data))) + } + b = append(b, f.Data...) + return b, nil +} + +// MaxDataLen returns the maximum data length +func (f *DatagramFrame) MaxDataLen(maxSize protocol.ByteCount, version protocol.Version) protocol.ByteCount { + headerLen := protocol.ByteCount(1) + if f.DataLenPresent { + // pretend that the data size will be 1 bytes + // if it turns out that varint encoding the length will consume 2 bytes, we need to adjust the data length afterwards + headerLen++ + } + if headerLen > maxSize { + return 0 + } + maxDataLen := maxSize - headerLen + if f.DataLenPresent && quicvarint.Len(uint64(maxDataLen)) != 1 { + maxDataLen-- + } + return maxDataLen +} + +// Length of a written frame +func (f *DatagramFrame) Length(_ protocol.Version) protocol.ByteCount { + length := 1 + protocol.ByteCount(len(f.Data)) + if f.DataLenPresent { + length += quicvarint.Len(uint64(len(f.Data))) + } + return length +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/extended_header.go b/backend/vendor/github.com/enetx/uquic/internal/wire/extended_header.go new file mode 100644 index 0000000..b03e2e0 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/extended_header.go @@ -0,0 +1,210 @@ +package wire + +import ( + "bytes" + "encoding/binary" + "errors" + "fmt" + "io" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/quicvarint" +) + +// ErrInvalidReservedBits is returned when the reserved bits are incorrect. +// When this error is returned, parsing continues, and an ExtendedHeader is returned. +// This is necessary because we need to decrypt the packet in that case, +// in order to avoid a timing side-channel. +var ErrInvalidReservedBits = errors.New("invalid reserved bits") + +// ExtendedHeader is the header of a QUIC packet. +type ExtendedHeader struct { + Header + + typeByte byte + + KeyPhase protocol.KeyPhaseBit + + PacketNumberLen protocol.PacketNumberLen + PacketNumber protocol.PacketNumber + + parsedLen protocol.ByteCount +} + +func (h *ExtendedHeader) parse(b *bytes.Reader, v protocol.Version) (bool /* reserved bits valid */, error) { + startLen := b.Len() + // read the (now unencrypted) first byte + var err error + h.typeByte, err = b.ReadByte() + if err != nil { + return false, err + } + if _, err := b.Seek(int64(h.Header.ParsedLen())-1, io.SeekCurrent); err != nil { + return false, err + } + reservedBitsValid, err := h.parseLongHeader(b, v) + if err != nil { + return false, err + } + h.parsedLen = protocol.ByteCount(startLen - b.Len()) + return reservedBitsValid, err +} + +func (h *ExtendedHeader) parseLongHeader(b *bytes.Reader, _ protocol.Version) (bool /* reserved bits valid */, error) { + if err := h.readPacketNumber(b); err != nil { + return false, err + } + if h.typeByte&0xc != 0 { + return false, nil + } + return true, nil +} + +func (h *ExtendedHeader) readPacketNumber(b *bytes.Reader) error { + h.PacketNumberLen = protocol.PacketNumberLen(h.typeByte&0x3) + 1 + switch h.PacketNumberLen { + case protocol.PacketNumberLen1: + n, err := b.ReadByte() + if err != nil { + return err + } + h.PacketNumber = protocol.PacketNumber(n) + case protocol.PacketNumberLen2: + n, err := utils.BigEndian.ReadUint16(b) + if err != nil { + return err + } + h.PacketNumber = protocol.PacketNumber(n) + case protocol.PacketNumberLen3: + n, err := utils.BigEndian.ReadUint24(b) + if err != nil { + return err + } + h.PacketNumber = protocol.PacketNumber(n) + case protocol.PacketNumberLen4: + n, err := utils.BigEndian.ReadUint32(b) + if err != nil { + return err + } + h.PacketNumber = protocol.PacketNumber(n) + default: + return fmt.Errorf("invalid packet number length: %d", h.PacketNumberLen) + } + return nil +} + +// Append appends the Header. +func (h *ExtendedHeader) Append(b []byte, v protocol.Version) ([]byte, error) { + if h.DestConnectionID.Len() > protocol.MaxConnIDLen { + return nil, fmt.Errorf("invalid connection ID length: %d bytes", h.DestConnectionID.Len()) + } + if h.SrcConnectionID.Len() > protocol.MaxConnIDLen { + return nil, fmt.Errorf("invalid connection ID length: %d bytes", h.SrcConnectionID.Len()) + } + + var packetType uint8 + if v == protocol.Version2 { + //nolint:exhaustive + switch h.Type { + case protocol.PacketTypeInitial: + packetType = 0b01 + case protocol.PacketType0RTT: + packetType = 0b10 + case protocol.PacketTypeHandshake: + packetType = 0b11 + case protocol.PacketTypeRetry: + packetType = 0b00 + } + } else { + //nolint:exhaustive + switch h.Type { + case protocol.PacketTypeInitial: + packetType = 0b00 + case protocol.PacketType0RTT: + packetType = 0b01 + case protocol.PacketTypeHandshake: + packetType = 0b10 + case protocol.PacketTypeRetry: + packetType = 0b11 + } + } + firstByte := 0xc0 | packetType<<4 + if h.Type != protocol.PacketTypeRetry { + // Retry packets don't have a packet number + firstByte |= uint8(h.PacketNumberLen - 1) + } + + b = append(b, firstByte) + b = append(b, make([]byte, 4)...) + binary.BigEndian.PutUint32(b[len(b)-4:], uint32(h.Version)) + b = append(b, uint8(h.DestConnectionID.Len())) + b = append(b, h.DestConnectionID.Bytes()...) + b = append(b, uint8(h.SrcConnectionID.Len())) + b = append(b, h.SrcConnectionID.Bytes()...) + + //nolint:exhaustive + switch h.Type { + case protocol.PacketTypeRetry: + b = append(b, h.Token...) + return b, nil + case protocol.PacketTypeInitial: + b = quicvarint.Append(b, uint64(len(h.Token))) + b = append(b, h.Token...) + } + b = quicvarint.AppendWithLen(b, uint64(h.Length), 2) + return appendPacketNumber(b, h.PacketNumber, h.PacketNumberLen) +} + +// ParsedLen returns the number of bytes that were consumed when parsing the header +func (h *ExtendedHeader) ParsedLen() protocol.ByteCount { + return h.parsedLen +} + +// GetLength determines the length of the Header. +func (h *ExtendedHeader) GetLength(_ protocol.Version) protocol.ByteCount { + length := 1 /* type byte */ + 4 /* version */ + 1 /* dest conn ID len */ + protocol.ByteCount(h.DestConnectionID.Len()) + 1 /* src conn ID len */ + protocol.ByteCount(h.SrcConnectionID.Len()) + protocol.ByteCount(h.PacketNumberLen) + 2 /* length */ + if h.Type == protocol.PacketTypeInitial { + length += quicvarint.Len(uint64(len(h.Token))) + protocol.ByteCount(len(h.Token)) + } + return length +} + +// Log logs the Header +func (h *ExtendedHeader) Log(logger utils.Logger) { + var token string + if h.Type == protocol.PacketTypeInitial || h.Type == protocol.PacketTypeRetry { + if len(h.Token) == 0 { + token = "Token: (empty), " + } else { + token = fmt.Sprintf("Token: %#x, ", h.Token) + } + if h.Type == protocol.PacketTypeRetry { + logger.Debugf("\tLong Header{Type: %s, DestConnectionID: %s, SrcConnectionID: %s, %sVersion: %s}", h.Type, h.DestConnectionID, h.SrcConnectionID, token, h.Version) + return + } + } + logger.Debugf("\tLong Header{Type: %s, DestConnectionID: %s, SrcConnectionID: %s, %sPacketNumber: %d, PacketNumberLen: %d, Length: %d, Version: %s}", h.Type, h.DestConnectionID, h.SrcConnectionID, token, h.PacketNumber, h.PacketNumberLen, h.Length, h.Version) +} + +func appendPacketNumber(b []byte, pn protocol.PacketNumber, pnLen protocol.PacketNumberLen) ([]byte, error) { + switch pnLen { + case protocol.PacketNumberLen1: + b = append(b, uint8(pn)) + case protocol.PacketNumberLen2: + buf := make([]byte, 2) + binary.BigEndian.PutUint16(buf, uint16(pn)) + b = append(b, buf...) + case protocol.PacketNumberLen3: + buf := make([]byte, 4) + binary.BigEndian.PutUint32(buf, uint32(pn)) + b = append(b, buf[1:]...) + case protocol.PacketNumberLen4: + buf := make([]byte, 4) + binary.BigEndian.PutUint32(buf, uint32(pn)) + b = append(b, buf...) + default: + return nil, fmt.Errorf("invalid packet number length: %d", pnLen) + } + return b, nil +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/frame_parser.go b/backend/vendor/github.com/enetx/uquic/internal/wire/frame_parser.go new file mode 100644 index 0000000..d92f49b --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/frame_parser.go @@ -0,0 +1,192 @@ +package wire + +import ( + "bytes" + "errors" + "fmt" + "reflect" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/quicvarint" +) + +const ( + pingFrameType = 0x1 + ackFrameType = 0x2 + ackECNFrameType = 0x3 + resetStreamFrameType = 0x4 + stopSendingFrameType = 0x5 + cryptoFrameType = 0x6 + newTokenFrameType = 0x7 + maxDataFrameType = 0x10 + maxStreamDataFrameType = 0x11 + bidiMaxStreamsFrameType = 0x12 + uniMaxStreamsFrameType = 0x13 + dataBlockedFrameType = 0x14 + streamDataBlockedFrameType = 0x15 + bidiStreamBlockedFrameType = 0x16 + uniStreamBlockedFrameType = 0x17 + newConnectionIDFrameType = 0x18 + retireConnectionIDFrameType = 0x19 + pathChallengeFrameType = 0x1a + pathResponseFrameType = 0x1b + connectionCloseFrameType = 0x1c + applicationCloseFrameType = 0x1d + handshakeDoneFrameType = 0x1e +) + +// The FrameParser parses QUIC frames, one by one. +type FrameParser struct { + r bytes.Reader // cached bytes.Reader, so we don't have to repeatedly allocate them + + ackDelayExponent uint8 + supportsDatagrams bool + + // To avoid allocating when parsing, keep a single ACK frame struct. + // It is used over and over again. + ackFrame *AckFrame +} + +// NewFrameParser creates a new frame parser. +func NewFrameParser(supportsDatagrams bool) *FrameParser { + return &FrameParser{ + r: *bytes.NewReader(nil), + supportsDatagrams: supportsDatagrams, + ackFrame: &AckFrame{}, + } +} + +// ParseNext parses the next frame. +// It skips PADDING frames. +func (p *FrameParser) ParseNext(data []byte, encLevel protocol.EncryptionLevel, v protocol.Version) (int, Frame, error) { + startLen := len(data) + p.r.Reset(data) + frame, err := p.parseNext(&p.r, encLevel, v) + n := startLen - p.r.Len() + p.r.Reset(nil) + return n, frame, err +} + +func (p *FrameParser) parseNext(r *bytes.Reader, encLevel protocol.EncryptionLevel, v protocol.Version) (Frame, error) { + for r.Len() != 0 { + typ, err := quicvarint.Read(r) + if err != nil { + return nil, &qerr.TransportError{ + ErrorCode: qerr.FrameEncodingError, + ErrorMessage: err.Error(), + } + } + if typ == 0x0 { // skip PADDING frames + continue + } + + f, err := p.parseFrame(r, typ, encLevel, v) + if err != nil { + return nil, &qerr.TransportError{ + FrameType: typ, + ErrorCode: qerr.FrameEncodingError, + ErrorMessage: err.Error(), + } + } + return f, nil + } + return nil, nil +} + +func (p *FrameParser) parseFrame(r *bytes.Reader, typ uint64, encLevel protocol.EncryptionLevel, v protocol.Version) (Frame, error) { + var frame Frame + var err error + if typ&0xf8 == 0x8 { + frame, err = parseStreamFrame(r, typ, v) + } else { + switch typ { + case pingFrameType: + frame = &PingFrame{} + case ackFrameType, ackECNFrameType: + ackDelayExponent := p.ackDelayExponent + if encLevel != protocol.Encryption1RTT { + ackDelayExponent = protocol.DefaultAckDelayExponent + } + p.ackFrame.Reset() + err = parseAckFrame(p.ackFrame, r, typ, ackDelayExponent, v) + frame = p.ackFrame + case resetStreamFrameType: + frame, err = parseResetStreamFrame(r, v) + case stopSendingFrameType: + frame, err = parseStopSendingFrame(r, v) + case cryptoFrameType: + frame, err = parseCryptoFrame(r, v) + case newTokenFrameType: + frame, err = parseNewTokenFrame(r, v) + case maxDataFrameType: + frame, err = parseMaxDataFrame(r, v) + case maxStreamDataFrameType: + frame, err = parseMaxStreamDataFrame(r, v) + case bidiMaxStreamsFrameType, uniMaxStreamsFrameType: + frame, err = parseMaxStreamsFrame(r, typ, v) + case dataBlockedFrameType: + frame, err = parseDataBlockedFrame(r, v) + case streamDataBlockedFrameType: + frame, err = parseStreamDataBlockedFrame(r, v) + case bidiStreamBlockedFrameType, uniStreamBlockedFrameType: + frame, err = parseStreamsBlockedFrame(r, typ, v) + case newConnectionIDFrameType: + frame, err = parseNewConnectionIDFrame(r, v) + case retireConnectionIDFrameType: + frame, err = parseRetireConnectionIDFrame(r, v) + case pathChallengeFrameType: + frame, err = parsePathChallengeFrame(r, v) + case pathResponseFrameType: + frame, err = parsePathResponseFrame(r, v) + case connectionCloseFrameType, applicationCloseFrameType: + frame, err = parseConnectionCloseFrame(r, typ, v) + case handshakeDoneFrameType: + frame = &HandshakeDoneFrame{} + case 0x30, 0x31: + if p.supportsDatagrams { + frame, err = parseDatagramFrame(r, typ, v) + break + } + fallthrough + default: + err = errors.New("unknown frame type") + } + } + if err != nil { + return nil, err + } + if !p.isAllowedAtEncLevel(frame, encLevel) { + return nil, fmt.Errorf("%s not allowed at encryption level %s", reflect.TypeOf(frame).Elem().Name(), encLevel) + } + return frame, nil +} + +func (p *FrameParser) isAllowedAtEncLevel(f Frame, encLevel protocol.EncryptionLevel) bool { + switch encLevel { + case protocol.EncryptionInitial, protocol.EncryptionHandshake: + switch f.(type) { + case *CryptoFrame, *AckFrame, *ConnectionCloseFrame, *PingFrame: + return true + default: + return false + } + case protocol.Encryption0RTT: + switch f.(type) { + case *CryptoFrame, *AckFrame, *ConnectionCloseFrame, *NewTokenFrame, *PathResponseFrame, *RetireConnectionIDFrame: + return false + default: + return true + } + case protocol.Encryption1RTT: + return true + default: + panic("unknown encryption level") + } +} + +// SetAckDelayExponent sets the acknowledgment delay exponent (sent in the transport parameters). +// This value is used to scale the ACK Delay field in the ACK frame. +func (p *FrameParser) SetAckDelayExponent(exp uint8) { + p.ackDelayExponent = exp +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/handshake_done_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/handshake_done_frame.go new file mode 100644 index 0000000..1e8f5f4 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/handshake_done_frame.go @@ -0,0 +1,17 @@ +package wire + +import ( + "github.com/enetx/uquic/internal/protocol" +) + +// A HandshakeDoneFrame is a HANDSHAKE_DONE frame +type HandshakeDoneFrame struct{} + +func (f *HandshakeDoneFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + return append(b, handshakeDoneFrameType), nil +} + +// Length of a written frame +func (f *HandshakeDoneFrame) Length(_ protocol.Version) protocol.ByteCount { + return 1 +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/header.go b/backend/vendor/github.com/enetx/uquic/internal/wire/header.go new file mode 100644 index 0000000..d920fd1 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/header.go @@ -0,0 +1,300 @@ +package wire + +import ( + "bytes" + "encoding/binary" + "errors" + "fmt" + "io" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/quicvarint" +) + +// ParseConnectionID parses the destination connection ID of a packet. +func ParseConnectionID(data []byte, shortHeaderConnIDLen int) (protocol.ConnectionID, error) { + if len(data) == 0 { + return protocol.ConnectionID{}, io.EOF + } + if !IsLongHeaderPacket(data[0]) { + if len(data) < shortHeaderConnIDLen+1 { + return protocol.ConnectionID{}, io.EOF + } + return protocol.ParseConnectionID(data[1 : 1+shortHeaderConnIDLen]), nil + } + if len(data) < 6 { + return protocol.ConnectionID{}, io.EOF + } + destConnIDLen := int(data[5]) + if destConnIDLen > protocol.MaxConnIDLen { + return protocol.ConnectionID{}, protocol.ErrInvalidConnectionIDLen + } + if len(data) < 6+destConnIDLen { + return protocol.ConnectionID{}, io.EOF + } + return protocol.ParseConnectionID(data[6 : 6+destConnIDLen]), nil +} + +// ParseArbitraryLenConnectionIDs parses the most general form of a Long Header packet, +// using only the version-independent packet format as described in Section 5.1 of RFC 8999: +// https://datatracker.ietf.org/doc/html/rfc8999#section-5.1. +// This function should only be called on Long Header packets for which we don't support the version. +func ParseArbitraryLenConnectionIDs(data []byte) (bytesParsed int, dest, src protocol.ArbitraryLenConnectionID, _ error) { + r := bytes.NewReader(data) + remaining := r.Len() + src, dest, err := parseArbitraryLenConnectionIDs(r) + return remaining - r.Len(), src, dest, err +} + +func parseArbitraryLenConnectionIDs(r *bytes.Reader) (dest, src protocol.ArbitraryLenConnectionID, _ error) { + r.Seek(5, io.SeekStart) // skip first byte and version field + destConnIDLen, err := r.ReadByte() + if err != nil { + return nil, nil, err + } + destConnID := make(protocol.ArbitraryLenConnectionID, destConnIDLen) + if _, err := io.ReadFull(r, destConnID); err != nil { + if err == io.ErrUnexpectedEOF { + err = io.EOF + } + return nil, nil, err + } + srcConnIDLen, err := r.ReadByte() + if err != nil { + return nil, nil, err + } + srcConnID := make(protocol.ArbitraryLenConnectionID, srcConnIDLen) + if _, err := io.ReadFull(r, srcConnID); err != nil { + if err == io.ErrUnexpectedEOF { + err = io.EOF + } + return nil, nil, err + } + return destConnID, srcConnID, nil +} + +func IsPotentialQUICPacket(firstByte byte) bool { + return firstByte&0x40 > 0 +} + +// IsLongHeaderPacket says if this is a Long Header packet +func IsLongHeaderPacket(firstByte byte) bool { + return firstByte&0x80 > 0 +} + +// ParseVersion parses the QUIC version. +// It should only be called for Long Header packets (Short Header packets don't contain a version number). +func ParseVersion(data []byte) (protocol.Version, error) { + if len(data) < 5 { + return 0, io.EOF + } + return protocol.Version(binary.BigEndian.Uint32(data[1:5])), nil +} + +// IsVersionNegotiationPacket says if this is a version negotiation packet +func IsVersionNegotiationPacket(b []byte) bool { + if len(b) < 5 { + return false + } + return IsLongHeaderPacket(b[0]) && b[1] == 0 && b[2] == 0 && b[3] == 0 && b[4] == 0 +} + +// Is0RTTPacket says if this is a 0-RTT packet. +// A packet sent with a version we don't understand can never be a 0-RTT packet. +func Is0RTTPacket(b []byte) bool { + if len(b) < 5 { + return false + } + if !IsLongHeaderPacket(b[0]) { + return false + } + version := protocol.Version(binary.BigEndian.Uint32(b[1:5])) + //nolint:exhaustive // We only need to test QUIC versions that we support. + switch version { + case protocol.Version1: + return b[0]>>4&0b11 == 0b01 + case protocol.Version2: + return b[0]>>4&0b11 == 0b10 + default: + return false + } +} + +var ErrUnsupportedVersion = errors.New("unsupported version") + +// The Header is the version independent part of the header +type Header struct { + typeByte byte + Type protocol.PacketType + + Version protocol.Version + SrcConnectionID protocol.ConnectionID + DestConnectionID protocol.ConnectionID + + Length protocol.ByteCount + + Token []byte + + parsedLen protocol.ByteCount // how many bytes were read while parsing this header +} + +// ParsePacket parses a packet. +// If the packet has a long header, the packet is cut according to the length field. +// If we understand the version, the packet is header up unto the packet number. +// Otherwise, only the invariant part of the header is parsed. +func ParsePacket(data []byte) (*Header, []byte, []byte, error) { + if len(data) == 0 || !IsLongHeaderPacket(data[0]) { + return nil, nil, nil, errors.New("not a long header packet") + } + hdr, err := parseHeader(bytes.NewReader(data)) + if err != nil { + if err == ErrUnsupportedVersion { + return hdr, nil, nil, ErrUnsupportedVersion + } + return nil, nil, nil, err + } + if protocol.ByteCount(len(data)) < hdr.ParsedLen()+hdr.Length { + return nil, nil, nil, fmt.Errorf("packet length (%d bytes) is smaller than the expected length (%d bytes)", len(data)-int(hdr.ParsedLen()), hdr.Length) + } + packetLen := int(hdr.ParsedLen() + hdr.Length) + return hdr, data[:packetLen], data[packetLen:], nil +} + +// ParseHeader parses the header. +// For short header packets: up to the packet number. +// For long header packets: +// * if we understand the version: up to the packet number +// * if not, only the invariant part of the header +func parseHeader(b *bytes.Reader) (*Header, error) { + startLen := b.Len() + typeByte, err := b.ReadByte() + if err != nil { + return nil, err + } + + h := &Header{typeByte: typeByte} + err = h.parseLongHeader(b) + h.parsedLen = protocol.ByteCount(startLen - b.Len()) + return h, err +} + +func (h *Header) parseLongHeader(b *bytes.Reader) error { + v, err := utils.BigEndian.ReadUint32(b) + if err != nil { + return err + } + h.Version = protocol.Version(v) + if h.Version != 0 && h.typeByte&0x40 == 0 { + return errors.New("not a QUIC packet") + } + destConnIDLen, err := b.ReadByte() + if err != nil { + return err + } + h.DestConnectionID, err = protocol.ReadConnectionID(b, int(destConnIDLen)) + if err != nil { + return err + } + srcConnIDLen, err := b.ReadByte() + if err != nil { + return err + } + h.SrcConnectionID, err = protocol.ReadConnectionID(b, int(srcConnIDLen)) + if err != nil { + return err + } + if h.Version == 0 { // version negotiation packet + return nil + } + // If we don't understand the version, we have no idea how to interpret the rest of the bytes + if !protocol.IsSupportedVersion(protocol.SupportedVersions, h.Version) { + return ErrUnsupportedVersion + } + + if h.Version == protocol.Version2 { + switch h.typeByte >> 4 & 0b11 { + case 0b00: + h.Type = protocol.PacketTypeRetry + case 0b01: + h.Type = protocol.PacketTypeInitial + case 0b10: + h.Type = protocol.PacketType0RTT + case 0b11: + h.Type = protocol.PacketTypeHandshake + } + } else { + switch h.typeByte >> 4 & 0b11 { + case 0b00: + h.Type = protocol.PacketTypeInitial + case 0b01: + h.Type = protocol.PacketType0RTT + case 0b10: + h.Type = protocol.PacketTypeHandshake + case 0b11: + h.Type = protocol.PacketTypeRetry + } + } + + if h.Type == protocol.PacketTypeRetry { + tokenLen := b.Len() - 16 + if tokenLen <= 0 { + return io.EOF + } + h.Token = make([]byte, tokenLen) + if _, err := io.ReadFull(b, h.Token); err != nil { + return err + } + _, err := b.Seek(16, io.SeekCurrent) + return err + } + + if h.Type == protocol.PacketTypeInitial { + tokenLen, err := quicvarint.Read(b) + if err != nil { + return err + } + if tokenLen > uint64(b.Len()) { + return io.EOF + } + h.Token = make([]byte, tokenLen) + if _, err := io.ReadFull(b, h.Token); err != nil { + return err + } + } + + pl, err := quicvarint.Read(b) + if err != nil { + return err + } + h.Length = protocol.ByteCount(pl) + return nil +} + +// ParsedLen returns the number of bytes that were consumed when parsing the header +func (h *Header) ParsedLen() protocol.ByteCount { + return h.parsedLen +} + +// ParseExtended parses the version dependent part of the header. +// The Reader has to be set such that it points to the first byte of the header. +func (h *Header) ParseExtended(b *bytes.Reader, ver protocol.Version) (*ExtendedHeader, error) { + extHdr := h.toExtendedHeader() + reservedBitsValid, err := extHdr.parse(b, ver) + if err != nil { + return nil, err + } + if !reservedBitsValid { + return extHdr, ErrInvalidReservedBits + } + return extHdr, nil +} + +func (h *Header) toExtendedHeader() *ExtendedHeader { + return &ExtendedHeader{Header: *h} +} + +// PacketType is the type of the packet, for logging purposes +func (h *Header) PacketType() string { + return h.Type.String() +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/interface.go b/backend/vendor/github.com/enetx/uquic/internal/wire/interface.go new file mode 100644 index 0000000..daf205f --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/interface.go @@ -0,0 +1,11 @@ +package wire + +import ( + "github.com/enetx/uquic/internal/protocol" +) + +// A Frame in QUIC +type Frame interface { + Append(b []byte, version protocol.Version) ([]byte, error) + Length(version protocol.Version) protocol.ByteCount +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/log.go b/backend/vendor/github.com/enetx/uquic/internal/wire/log.go new file mode 100644 index 0000000..3d43daf --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/log.go @@ -0,0 +1,74 @@ +package wire + +import ( + "fmt" + "strings" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" +) + +// LogFrame logs a frame, either sent or received +func LogFrame(logger utils.Logger, frame Frame, sent bool) { + if !logger.Debug() { + return + } + dir := "<-" + if sent { + dir = "->" + } + switch f := frame.(type) { + case *CryptoFrame: + dataLen := protocol.ByteCount(len(f.Data)) + logger.Debugf("\t%s &wire.CryptoFrame{Offset: %d, Data length: %d, Offset + Data length: %d}", dir, f.Offset, dataLen, f.Offset+dataLen) + case *StreamFrame: + logger.Debugf("\t%s &wire.StreamFrame{StreamID: %d, Fin: %t, Offset: %d, Data length: %d, Offset + Data length: %d}", dir, f.StreamID, f.Fin, f.Offset, f.DataLen(), f.Offset+f.DataLen()) + case *ResetStreamFrame: + logger.Debugf("\t%s &wire.ResetStreamFrame{StreamID: %d, ErrorCode: %#x, FinalSize: %d}", dir, f.StreamID, f.ErrorCode, f.FinalSize) + case *AckFrame: + hasECN := f.ECT0 > 0 || f.ECT1 > 0 || f.ECNCE > 0 + var ecn string + if hasECN { + ecn = fmt.Sprintf(", ECT0: %d, ECT1: %d, CE: %d", f.ECT0, f.ECT1, f.ECNCE) + } + if len(f.AckRanges) > 1 { + ackRanges := make([]string, len(f.AckRanges)) + for i, r := range f.AckRanges { + ackRanges[i] = fmt.Sprintf("{Largest: %d, Smallest: %d}", r.Largest, r.Smallest) + } + logger.Debugf("\t%s &wire.AckFrame{LargestAcked: %d, LowestAcked: %d, AckRanges: {%s}, DelayTime: %s%s}", dir, f.LargestAcked(), f.LowestAcked(), strings.Join(ackRanges, ", "), f.DelayTime.String(), ecn) + } else { + logger.Debugf("\t%s &wire.AckFrame{LargestAcked: %d, LowestAcked: %d, DelayTime: %s%s}", dir, f.LargestAcked(), f.LowestAcked(), f.DelayTime.String(), ecn) + } + case *MaxDataFrame: + logger.Debugf("\t%s &wire.MaxDataFrame{MaximumData: %d}", dir, f.MaximumData) + case *MaxStreamDataFrame: + logger.Debugf("\t%s &wire.MaxStreamDataFrame{StreamID: %d, MaximumStreamData: %d}", dir, f.StreamID, f.MaximumStreamData) + case *DataBlockedFrame: + logger.Debugf("\t%s &wire.DataBlockedFrame{MaximumData: %d}", dir, f.MaximumData) + case *StreamDataBlockedFrame: + logger.Debugf("\t%s &wire.StreamDataBlockedFrame{StreamID: %d, MaximumStreamData: %d}", dir, f.StreamID, f.MaximumStreamData) + case *MaxStreamsFrame: + switch f.Type { + case protocol.StreamTypeUni: + logger.Debugf("\t%s &wire.MaxStreamsFrame{Type: uni, MaxStreamNum: %d}", dir, f.MaxStreamNum) + case protocol.StreamTypeBidi: + logger.Debugf("\t%s &wire.MaxStreamsFrame{Type: bidi, MaxStreamNum: %d}", dir, f.MaxStreamNum) + } + case *StreamsBlockedFrame: + switch f.Type { + case protocol.StreamTypeUni: + logger.Debugf("\t%s &wire.StreamsBlockedFrame{Type: uni, MaxStreams: %d}", dir, f.StreamLimit) + case protocol.StreamTypeBidi: + logger.Debugf("\t%s &wire.StreamsBlockedFrame{Type: bidi, MaxStreams: %d}", dir, f.StreamLimit) + } + case *NewConnectionIDFrame: + logger.Debugf("\t%s &wire.NewConnectionIDFrame{SequenceNumber: %d, RetirePriorTo: %d, ConnectionID: %s, StatelessResetToken: %#x}", dir, f.SequenceNumber, f.RetirePriorTo, f.ConnectionID, f.StatelessResetToken) + case *RetireConnectionIDFrame: + logger.Debugf("\t%s &wire.RetireConnectionIDFrame{SequenceNumber: %d}", dir, f.SequenceNumber) + case *NewTokenFrame: + logger.Debugf("\t%s &wire.NewTokenFrame{Token: %#x}", dir, f.Token) + default: + logger.Debugf("\t%s %#v", dir, frame) + } +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/max_data_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/max_data_frame.go new file mode 100644 index 0000000..59836e4 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/max_data_frame.go @@ -0,0 +1,35 @@ +package wire + +import ( + "bytes" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/quicvarint" +) + +// A MaxDataFrame carries flow control information for the connection +type MaxDataFrame struct { + MaximumData protocol.ByteCount +} + +// parseMaxDataFrame parses a MAX_DATA frame +func parseMaxDataFrame(r *bytes.Reader, _ protocol.Version) (*MaxDataFrame, error) { + frame := &MaxDataFrame{} + byteOffset, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + frame.MaximumData = protocol.ByteCount(byteOffset) + return frame, nil +} + +func (f *MaxDataFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + b = append(b, maxDataFrameType) + b = quicvarint.Append(b, uint64(f.MaximumData)) + return b, nil +} + +// Length of a written frame +func (f *MaxDataFrame) Length(_ protocol.Version) protocol.ByteCount { + return 1 + quicvarint.Len(uint64(f.MaximumData)) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/max_stream_data_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/max_stream_data_frame.go new file mode 100644 index 0000000..63e7e2b --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/max_stream_data_frame.go @@ -0,0 +1,42 @@ +package wire + +import ( + "bytes" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/quicvarint" +) + +// A MaxStreamDataFrame is a MAX_STREAM_DATA frame +type MaxStreamDataFrame struct { + StreamID protocol.StreamID + MaximumStreamData protocol.ByteCount +} + +func parseMaxStreamDataFrame(r *bytes.Reader, _ protocol.Version) (*MaxStreamDataFrame, error) { + sid, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + offset, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + + return &MaxStreamDataFrame{ + StreamID: protocol.StreamID(sid), + MaximumStreamData: protocol.ByteCount(offset), + }, nil +} + +func (f *MaxStreamDataFrame) Append(b []byte, version protocol.Version) ([]byte, error) { + b = append(b, maxStreamDataFrameType) + b = quicvarint.Append(b, uint64(f.StreamID)) + b = quicvarint.Append(b, uint64(f.MaximumStreamData)) + return b, nil +} + +// Length of a written frame +func (f *MaxStreamDataFrame) Length(version protocol.Version) protocol.ByteCount { + return 1 + quicvarint.Len(uint64(f.StreamID)) + quicvarint.Len(uint64(f.MaximumStreamData)) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/max_streams_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/max_streams_frame.go new file mode 100644 index 0000000..3940304 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/max_streams_frame.go @@ -0,0 +1,50 @@ +package wire + +import ( + "bytes" + "fmt" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/quicvarint" +) + +// A MaxStreamsFrame is a MAX_STREAMS frame +type MaxStreamsFrame struct { + Type protocol.StreamType + MaxStreamNum protocol.StreamNum +} + +func parseMaxStreamsFrame(r *bytes.Reader, typ uint64, _ protocol.Version) (*MaxStreamsFrame, error) { + f := &MaxStreamsFrame{} + switch typ { + case bidiMaxStreamsFrameType: + f.Type = protocol.StreamTypeBidi + case uniMaxStreamsFrameType: + f.Type = protocol.StreamTypeUni + } + streamID, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + f.MaxStreamNum = protocol.StreamNum(streamID) + if f.MaxStreamNum > protocol.MaxStreamCount { + return nil, fmt.Errorf("%d exceeds the maximum stream count", f.MaxStreamNum) + } + return f, nil +} + +func (f *MaxStreamsFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + switch f.Type { + case protocol.StreamTypeBidi: + b = append(b, bidiMaxStreamsFrameType) + case protocol.StreamTypeUni: + b = append(b, uniMaxStreamsFrameType) + } + b = quicvarint.Append(b, uint64(f.MaxStreamNum)) + return b, nil +} + +// Length of a written frame +func (f *MaxStreamsFrame) Length(protocol.Version) protocol.ByteCount { + return 1 + quicvarint.Len(uint64(f.MaxStreamNum)) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/new_connection_id_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/new_connection_id_frame.go new file mode 100644 index 0000000..18f46f7 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/new_connection_id_frame.go @@ -0,0 +1,77 @@ +package wire + +import ( + "bytes" + "errors" + "fmt" + "io" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/quicvarint" +) + +// A NewConnectionIDFrame is a NEW_CONNECTION_ID frame +type NewConnectionIDFrame struct { + SequenceNumber uint64 + RetirePriorTo uint64 + ConnectionID protocol.ConnectionID + StatelessResetToken protocol.StatelessResetToken +} + +func parseNewConnectionIDFrame(r *bytes.Reader, _ protocol.Version) (*NewConnectionIDFrame, error) { + seq, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + ret, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + if ret > seq { + //nolint:stylecheck + return nil, fmt.Errorf("Retire Prior To value (%d) larger than Sequence Number (%d)", ret, seq) + } + connIDLen, err := r.ReadByte() + if err != nil { + return nil, err + } + if connIDLen == 0 { + return nil, errors.New("invalid zero-length connection ID") + } + connID, err := protocol.ReadConnectionID(r, int(connIDLen)) + if err != nil { + return nil, err + } + frame := &NewConnectionIDFrame{ + SequenceNumber: seq, + RetirePriorTo: ret, + ConnectionID: connID, + } + if _, err := io.ReadFull(r, frame.StatelessResetToken[:]); err != nil { + if err == io.ErrUnexpectedEOF { + return nil, io.EOF + } + return nil, err + } + + return frame, nil +} + +func (f *NewConnectionIDFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + b = append(b, newConnectionIDFrameType) + b = quicvarint.Append(b, f.SequenceNumber) + b = quicvarint.Append(b, f.RetirePriorTo) + connIDLen := f.ConnectionID.Len() + if connIDLen > protocol.MaxConnIDLen { + return nil, fmt.Errorf("invalid connection ID length: %d", connIDLen) + } + b = append(b, uint8(connIDLen)) + b = append(b, f.ConnectionID.Bytes()...) + b = append(b, f.StatelessResetToken[:]...) + return b, nil +} + +// Length of a written frame +func (f *NewConnectionIDFrame) Length(protocol.Version) protocol.ByteCount { + return 1 + quicvarint.Len(f.SequenceNumber) + quicvarint.Len(f.RetirePriorTo) + 1 /* connection ID length */ + protocol.ByteCount(f.ConnectionID.Len()) + 16 +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/new_token_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/new_token_frame.go new file mode 100644 index 0000000..7d8b289 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/new_token_frame.go @@ -0,0 +1,45 @@ +package wire + +import ( + "bytes" + "errors" + "io" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/quicvarint" +) + +// A NewTokenFrame is a NEW_TOKEN frame +type NewTokenFrame struct { + Token []byte +} + +func parseNewTokenFrame(r *bytes.Reader, _ protocol.Version) (*NewTokenFrame, error) { + tokenLen, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + if uint64(r.Len()) < tokenLen { + return nil, io.EOF + } + if tokenLen == 0 { + return nil, errors.New("token must not be empty") + } + token := make([]byte, int(tokenLen)) + if _, err := io.ReadFull(r, token); err != nil { + return nil, err + } + return &NewTokenFrame{Token: token}, nil +} + +func (f *NewTokenFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + b = append(b, newTokenFrameType) + b = quicvarint.Append(b, uint64(len(f.Token))) + b = append(b, f.Token...) + return b, nil +} + +// Length of a written frame +func (f *NewTokenFrame) Length(protocol.Version) protocol.ByteCount { + return 1 + quicvarint.Len(uint64(len(f.Token))) + protocol.ByteCount(len(f.Token)) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/path_challenge_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/path_challenge_frame.go new file mode 100644 index 0000000..2c85027 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/path_challenge_frame.go @@ -0,0 +1,35 @@ +package wire + +import ( + "bytes" + "io" + + "github.com/enetx/uquic/internal/protocol" +) + +// A PathChallengeFrame is a PATH_CHALLENGE frame +type PathChallengeFrame struct { + Data [8]byte +} + +func parsePathChallengeFrame(r *bytes.Reader, _ protocol.Version) (*PathChallengeFrame, error) { + frame := &PathChallengeFrame{} + if _, err := io.ReadFull(r, frame.Data[:]); err != nil { + if err == io.ErrUnexpectedEOF { + return nil, io.EOF + } + return nil, err + } + return frame, nil +} + +func (f *PathChallengeFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + b = append(b, pathChallengeFrameType) + b = append(b, f.Data[:]...) + return b, nil +} + +// Length of a written frame +func (f *PathChallengeFrame) Length(_ protocol.Version) protocol.ByteCount { + return 1 + 8 +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/path_response_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/path_response_frame.go new file mode 100644 index 0000000..248cc37 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/path_response_frame.go @@ -0,0 +1,35 @@ +package wire + +import ( + "bytes" + "io" + + "github.com/enetx/uquic/internal/protocol" +) + +// A PathResponseFrame is a PATH_RESPONSE frame +type PathResponseFrame struct { + Data [8]byte +} + +func parsePathResponseFrame(r *bytes.Reader, _ protocol.Version) (*PathResponseFrame, error) { + frame := &PathResponseFrame{} + if _, err := io.ReadFull(r, frame.Data[:]); err != nil { + if err == io.ErrUnexpectedEOF { + return nil, io.EOF + } + return nil, err + } + return frame, nil +} + +func (f *PathResponseFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + b = append(b, pathResponseFrameType) + b = append(b, f.Data[:]...) + return b, nil +} + +// Length of a written frame +func (f *PathResponseFrame) Length(_ protocol.Version) protocol.ByteCount { + return 1 + 8 +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/ping_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/ping_frame.go new file mode 100644 index 0000000..005d509 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/ping_frame.go @@ -0,0 +1,17 @@ +package wire + +import ( + "github.com/enetx/uquic/internal/protocol" +) + +// A PingFrame is a PING frame +type PingFrame struct{} + +func (f *PingFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + return append(b, pingFrameType), nil +} + +// Length of a written frame +func (f *PingFrame) Length(_ protocol.Version) protocol.ByteCount { + return 1 +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/pool.go b/backend/vendor/github.com/enetx/uquic/internal/wire/pool.go new file mode 100644 index 0000000..6101ad9 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/pool.go @@ -0,0 +1,33 @@ +package wire + +import ( + "sync" + + "github.com/enetx/uquic/internal/protocol" +) + +var pool sync.Pool + +func init() { + pool.New = func() interface{} { + return &StreamFrame{ + Data: make([]byte, 0, protocol.MaxPacketBufferSize), + fromPool: true, + } + } +} + +func GetStreamFrame() *StreamFrame { + f := pool.Get().(*StreamFrame) + return f +} + +func putStreamFrame(f *StreamFrame) { + if !f.fromPool { + return + } + if protocol.ByteCount(cap(f.Data)) != protocol.MaxPacketBufferSize { + panic("wire.PutStreamFrame called with packet of wrong size!") + } + pool.Put(f) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/reset_stream_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/reset_stream_frame.go new file mode 100644 index 0000000..2cee9ac --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/reset_stream_frame.go @@ -0,0 +1,54 @@ +package wire + +import ( + "bytes" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/quicvarint" +) + +// A ResetStreamFrame is a RESET_STREAM frame in QUIC +type ResetStreamFrame struct { + StreamID protocol.StreamID + ErrorCode qerr.StreamErrorCode + FinalSize protocol.ByteCount +} + +func parseResetStreamFrame(r *bytes.Reader, _ protocol.Version) (*ResetStreamFrame, error) { + var streamID protocol.StreamID + var byteOffset protocol.ByteCount + sid, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + streamID = protocol.StreamID(sid) + errorCode, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + bo, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + byteOffset = protocol.ByteCount(bo) + + return &ResetStreamFrame{ + StreamID: streamID, + ErrorCode: qerr.StreamErrorCode(errorCode), + FinalSize: byteOffset, + }, nil +} + +func (f *ResetStreamFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + b = append(b, resetStreamFrameType) + b = quicvarint.Append(b, uint64(f.StreamID)) + b = quicvarint.Append(b, uint64(f.ErrorCode)) + b = quicvarint.Append(b, uint64(f.FinalSize)) + return b, nil +} + +// Length of a written frame +func (f *ResetStreamFrame) Length(version protocol.Version) protocol.ByteCount { + return 1 + quicvarint.Len(uint64(f.StreamID)) + quicvarint.Len(uint64(f.ErrorCode)) + quicvarint.Len(uint64(f.FinalSize)) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/retire_connection_id_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/retire_connection_id_frame.go new file mode 100644 index 0000000..58a9f23 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/retire_connection_id_frame.go @@ -0,0 +1,32 @@ +package wire + +import ( + "bytes" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/quicvarint" +) + +// A RetireConnectionIDFrame is a RETIRE_CONNECTION_ID frame +type RetireConnectionIDFrame struct { + SequenceNumber uint64 +} + +func parseRetireConnectionIDFrame(r *bytes.Reader, _ protocol.Version) (*RetireConnectionIDFrame, error) { + seq, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + return &RetireConnectionIDFrame{SequenceNumber: seq}, nil +} + +func (f *RetireConnectionIDFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + b = append(b, retireConnectionIDFrameType) + b = quicvarint.Append(b, f.SequenceNumber) + return b, nil +} + +// Length of a written frame +func (f *RetireConnectionIDFrame) Length(protocol.Version) protocol.ByteCount { + return 1 + quicvarint.Len(f.SequenceNumber) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/short_header.go b/backend/vendor/github.com/enetx/uquic/internal/wire/short_header.go new file mode 100644 index 0000000..2921f32 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/short_header.go @@ -0,0 +1,73 @@ +package wire + +import ( + "errors" + "fmt" + "io" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" +) + +// ParseShortHeader parses a short header packet. +// It must be called after header protection was removed. +// Otherwise, the check for the reserved bits will (most likely) fail. +func ParseShortHeader(data []byte, connIDLen int) (length int, _ protocol.PacketNumber, _ protocol.PacketNumberLen, _ protocol.KeyPhaseBit, _ error) { + if len(data) == 0 { + return 0, 0, 0, 0, io.EOF + } + if data[0]&0x80 > 0 { + return 0, 0, 0, 0, errors.New("not a short header packet") + } + if data[0]&0x40 == 0 { + return 0, 0, 0, 0, errors.New("not a QUIC packet") + } + pnLen := protocol.PacketNumberLen(data[0]&0b11) + 1 + if len(data) < 1+int(pnLen)+connIDLen { + return 0, 0, 0, 0, io.EOF + } + + pos := 1 + connIDLen + var pn protocol.PacketNumber + switch pnLen { + case protocol.PacketNumberLen1: + pn = protocol.PacketNumber(data[pos]) + case protocol.PacketNumberLen2: + pn = protocol.PacketNumber(utils.BigEndian.Uint16(data[pos : pos+2])) + case protocol.PacketNumberLen3: + pn = protocol.PacketNumber(utils.BigEndian.Uint24(data[pos : pos+3])) + case protocol.PacketNumberLen4: + pn = protocol.PacketNumber(utils.BigEndian.Uint32(data[pos : pos+4])) + default: + return 0, 0, 0, 0, fmt.Errorf("invalid packet number length: %d", pnLen) + } + kp := protocol.KeyPhaseZero + if data[0]&0b100 > 0 { + kp = protocol.KeyPhaseOne + } + + var err error + if data[0]&0x18 != 0 { + err = ErrInvalidReservedBits + } + return 1 + connIDLen + int(pnLen), pn, pnLen, kp, err +} + +// AppendShortHeader writes a short header. +func AppendShortHeader(b []byte, connID protocol.ConnectionID, pn protocol.PacketNumber, pnLen protocol.PacketNumberLen, kp protocol.KeyPhaseBit) ([]byte, error) { + typeByte := 0x40 | uint8(pnLen-1) + if kp == protocol.KeyPhaseOne { + typeByte |= byte(1 << 2) + } + b = append(b, typeByte) + b = append(b, connID.Bytes()...) + return appendPacketNumber(b, pn, pnLen) +} + +func ShortHeaderLen(dest protocol.ConnectionID, pnLen protocol.PacketNumberLen) protocol.ByteCount { + return 1 + protocol.ByteCount(dest.Len()) + protocol.ByteCount(pnLen) +} + +func LogShortHeader(logger utils.Logger, dest protocol.ConnectionID, pn protocol.PacketNumber, pnLen protocol.PacketNumberLen, kp protocol.KeyPhaseBit) { + logger.Debugf("\tShort Header{DestConnectionID: %s, PacketNumber: %d, PacketNumberLen: %d, KeyPhase: %s}", dest, pn, pnLen, kp) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/stop_sending_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/stop_sending_frame.go new file mode 100644 index 0000000..1c9e5e1 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/stop_sending_frame.go @@ -0,0 +1,44 @@ +package wire + +import ( + "bytes" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/quicvarint" +) + +// A StopSendingFrame is a STOP_SENDING frame +type StopSendingFrame struct { + StreamID protocol.StreamID + ErrorCode qerr.StreamErrorCode +} + +// parseStopSendingFrame parses a STOP_SENDING frame +func parseStopSendingFrame(r *bytes.Reader, _ protocol.Version) (*StopSendingFrame, error) { + streamID, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + errorCode, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + + return &StopSendingFrame{ + StreamID: protocol.StreamID(streamID), + ErrorCode: qerr.StreamErrorCode(errorCode), + }, nil +} + +// Length of a written frame +func (f *StopSendingFrame) Length(_ protocol.Version) protocol.ByteCount { + return 1 + quicvarint.Len(uint64(f.StreamID)) + quicvarint.Len(uint64(f.ErrorCode)) +} + +func (f *StopSendingFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + b = append(b, stopSendingFrameType) + b = quicvarint.Append(b, uint64(f.StreamID)) + b = quicvarint.Append(b, uint64(f.ErrorCode)) + return b, nil +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/stream_data_blocked_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/stream_data_blocked_frame.go new file mode 100644 index 0000000..c3e64ca --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/stream_data_blocked_frame.go @@ -0,0 +1,42 @@ +package wire + +import ( + "bytes" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/quicvarint" +) + +// A StreamDataBlockedFrame is a STREAM_DATA_BLOCKED frame +type StreamDataBlockedFrame struct { + StreamID protocol.StreamID + MaximumStreamData protocol.ByteCount +} + +func parseStreamDataBlockedFrame(r *bytes.Reader, _ protocol.Version) (*StreamDataBlockedFrame, error) { + sid, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + offset, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + + return &StreamDataBlockedFrame{ + StreamID: protocol.StreamID(sid), + MaximumStreamData: protocol.ByteCount(offset), + }, nil +} + +func (f *StreamDataBlockedFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + b = append(b, 0x15) + b = quicvarint.Append(b, uint64(f.StreamID)) + b = quicvarint.Append(b, uint64(f.MaximumStreamData)) + return b, nil +} + +// Length of a written frame +func (f *StreamDataBlockedFrame) Length(version protocol.Version) protocol.ByteCount { + return 1 + quicvarint.Len(uint64(f.StreamID)) + quicvarint.Len(uint64(f.MaximumStreamData)) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/stream_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/stream_frame.go new file mode 100644 index 0000000..aba6795 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/stream_frame.go @@ -0,0 +1,184 @@ +package wire + +import ( + "bytes" + "errors" + "io" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/quicvarint" +) + +// A StreamFrame of QUIC +type StreamFrame struct { + StreamID protocol.StreamID + Offset protocol.ByteCount + Data []byte + Fin bool + DataLenPresent bool + + fromPool bool +} + +func parseStreamFrame(r *bytes.Reader, typ uint64, _ protocol.Version) (*StreamFrame, error) { + hasOffset := typ&0b100 > 0 + fin := typ&0b1 > 0 + hasDataLen := typ&0b10 > 0 + + streamID, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + var offset uint64 + if hasOffset { + offset, err = quicvarint.Read(r) + if err != nil { + return nil, err + } + } + + var dataLen uint64 + if hasDataLen { + var err error + dataLen, err = quicvarint.Read(r) + if err != nil { + return nil, err + } + } else { + // The rest of the packet is data + dataLen = uint64(r.Len()) + } + + var frame *StreamFrame + if dataLen < protocol.MinStreamFrameBufferSize { + frame = &StreamFrame{Data: make([]byte, dataLen)} + } else { + frame = GetStreamFrame() + // The STREAM frame can't be larger than the StreamFrame we obtained from the buffer, + // since those StreamFrames have a buffer length of the maximum packet size. + if dataLen > uint64(cap(frame.Data)) { + return nil, io.EOF + } + frame.Data = frame.Data[:dataLen] + } + + frame.StreamID = protocol.StreamID(streamID) + frame.Offset = protocol.ByteCount(offset) + frame.Fin = fin + frame.DataLenPresent = hasDataLen + + if dataLen != 0 { + if _, err := io.ReadFull(r, frame.Data); err != nil { + return nil, err + } + } + if frame.Offset+frame.DataLen() > protocol.MaxByteCount { + return nil, errors.New("stream data overflows maximum offset") + } + return frame, nil +} + +// Write writes a STREAM frame +func (f *StreamFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + if len(f.Data) == 0 && !f.Fin { + return nil, errors.New("StreamFrame: attempting to write empty frame without FIN") + } + + typ := byte(0x8) + if f.Fin { + typ ^= 0b1 + } + hasOffset := f.Offset != 0 + if f.DataLenPresent { + typ ^= 0b10 + } + if hasOffset { + typ ^= 0b100 + } + b = append(b, typ) + b = quicvarint.Append(b, uint64(f.StreamID)) + if hasOffset { + b = quicvarint.Append(b, uint64(f.Offset)) + } + if f.DataLenPresent { + b = quicvarint.Append(b, uint64(f.DataLen())) + } + b = append(b, f.Data...) + return b, nil +} + +// Length returns the total length of the STREAM frame +func (f *StreamFrame) Length(version protocol.Version) protocol.ByteCount { + length := 1 + quicvarint.Len(uint64(f.StreamID)) + if f.Offset != 0 { + length += quicvarint.Len(uint64(f.Offset)) + } + if f.DataLenPresent { + length += quicvarint.Len(uint64(f.DataLen())) + } + return length + f.DataLen() +} + +// DataLen gives the length of data in bytes +func (f *StreamFrame) DataLen() protocol.ByteCount { + return protocol.ByteCount(len(f.Data)) +} + +// MaxDataLen returns the maximum data length +// If 0 is returned, writing will fail (a STREAM frame must contain at least 1 byte of data). +func (f *StreamFrame) MaxDataLen(maxSize protocol.ByteCount, version protocol.Version) protocol.ByteCount { + headerLen := 1 + quicvarint.Len(uint64(f.StreamID)) + if f.Offset != 0 { + headerLen += quicvarint.Len(uint64(f.Offset)) + } + if f.DataLenPresent { + // pretend that the data size will be 1 bytes + // if it turns out that varint encoding the length will consume 2 bytes, we need to adjust the data length afterwards + headerLen++ + } + if headerLen > maxSize { + return 0 + } + maxDataLen := maxSize - headerLen + if f.DataLenPresent && quicvarint.Len(uint64(maxDataLen)) != 1 { + maxDataLen-- + } + return maxDataLen +} + +// MaybeSplitOffFrame splits a frame such that it is not bigger than n bytes. +// It returns if the frame was actually split. +// The frame might not be split if: +// * the size is large enough to fit the whole frame +// * the size is too small to fit even a 1-byte frame. In that case, the frame returned is nil. +func (f *StreamFrame) MaybeSplitOffFrame(maxSize protocol.ByteCount, version protocol.Version) (*StreamFrame, bool /* was splitting required */) { + if maxSize >= f.Length(version) { + return nil, false + } + + n := f.MaxDataLen(maxSize, version) + if n == 0 { + return nil, true + } + + new := GetStreamFrame() + new.StreamID = f.StreamID + new.Offset = f.Offset + new.Fin = false + new.DataLenPresent = f.DataLenPresent + + // swap the data slices + new.Data, f.Data = f.Data, new.Data + new.fromPool, f.fromPool = f.fromPool, new.fromPool + + f.Data = f.Data[:protocol.ByteCount(len(new.Data))-n] + copy(f.Data, new.Data[n:]) + new.Data = new.Data[:n] + f.Offset += n + + return new, true +} + +func (f *StreamFrame) PutBack() { + putStreamFrame(f) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/streams_blocked_frame.go b/backend/vendor/github.com/enetx/uquic/internal/wire/streams_blocked_frame.go new file mode 100644 index 0000000..20b165f --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/streams_blocked_frame.go @@ -0,0 +1,50 @@ +package wire + +import ( + "bytes" + "fmt" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/quicvarint" +) + +// A StreamsBlockedFrame is a STREAMS_BLOCKED frame +type StreamsBlockedFrame struct { + Type protocol.StreamType + StreamLimit protocol.StreamNum +} + +func parseStreamsBlockedFrame(r *bytes.Reader, typ uint64, _ protocol.Version) (*StreamsBlockedFrame, error) { + f := &StreamsBlockedFrame{} + switch typ { + case bidiStreamBlockedFrameType: + f.Type = protocol.StreamTypeBidi + case uniStreamBlockedFrameType: + f.Type = protocol.StreamTypeUni + } + streamLimit, err := quicvarint.Read(r) + if err != nil { + return nil, err + } + f.StreamLimit = protocol.StreamNum(streamLimit) + if f.StreamLimit > protocol.MaxStreamCount { + return nil, fmt.Errorf("%d exceeds the maximum stream count", f.StreamLimit) + } + return f, nil +} + +func (f *StreamsBlockedFrame) Append(b []byte, _ protocol.Version) ([]byte, error) { + switch f.Type { + case protocol.StreamTypeBidi: + b = append(b, bidiStreamBlockedFrameType) + case protocol.StreamTypeUni: + b = append(b, uniStreamBlockedFrameType) + } + b = quicvarint.Append(b, uint64(f.StreamLimit)) + return b, nil +} + +// Length of a written frame +func (f *StreamsBlockedFrame) Length(_ protocol.Version) protocol.ByteCount { + return 1 + quicvarint.Len(uint64(f.StreamLimit)) +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/transport_parameters.go b/backend/vendor/github.com/enetx/uquic/internal/wire/transport_parameters.go new file mode 100644 index 0000000..d632711 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/transport_parameters.go @@ -0,0 +1,580 @@ +package wire + +import ( + "bytes" + "crypto/rand" + "encoding/binary" + "errors" + "fmt" + "io" + "net/netip" + "sort" + "time" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/quicvarint" + tls "github.com/enetx/utls" +) + +// AdditionalTransportParametersClient are additional transport parameters that will be added +// to the client's transport parameters. +// This is not intended for production use, but _only_ to increase the size of the ClientHello beyond +// the usual size of less than 1 MTU. +var AdditionalTransportParametersClient map[uint64][]byte + +const transportParameterMarshalingVersion = 1 + +type transportParameterID uint64 + +const ( + originalDestinationConnectionIDParameterID transportParameterID = 0x0 + maxIdleTimeoutParameterID transportParameterID = 0x1 + statelessResetTokenParameterID transportParameterID = 0x2 + maxUDPPayloadSizeParameterID transportParameterID = 0x3 + initialMaxDataParameterID transportParameterID = 0x4 + initialMaxStreamDataBidiLocalParameterID transportParameterID = 0x5 + initialMaxStreamDataBidiRemoteParameterID transportParameterID = 0x6 + initialMaxStreamDataUniParameterID transportParameterID = 0x7 + initialMaxStreamsBidiParameterID transportParameterID = 0x8 + initialMaxStreamsUniParameterID transportParameterID = 0x9 + ackDelayExponentParameterID transportParameterID = 0xa + maxAckDelayParameterID transportParameterID = 0xb + disableActiveMigrationParameterID transportParameterID = 0xc + preferredAddressParameterID transportParameterID = 0xd + activeConnectionIDLimitParameterID transportParameterID = 0xe + initialSourceConnectionIDParameterID transportParameterID = 0xf + retrySourceConnectionIDParameterID transportParameterID = 0x10 + // RFC 9221 + maxDatagramFrameSizeParameterID transportParameterID = 0x20 +) + +// PreferredAddress is the value encoding in the preferred_address transport parameter +type PreferredAddress struct { + IPv4, IPv6 netip.AddrPort + ConnectionID protocol.ConnectionID + StatelessResetToken protocol.StatelessResetToken +} + +// TransportParameters are parameters sent to the peer during the handshake +type TransportParameters struct { + InitialMaxStreamDataBidiLocal protocol.ByteCount + InitialMaxStreamDataBidiRemote protocol.ByteCount + InitialMaxStreamDataUni protocol.ByteCount + InitialMaxData protocol.ByteCount + + MaxAckDelay time.Duration + AckDelayExponent uint8 + + DisableActiveMigration bool + + MaxUDPPayloadSize protocol.ByteCount + + MaxUniStreamNum protocol.StreamNum + MaxBidiStreamNum protocol.StreamNum + + MaxIdleTimeout time.Duration + + PreferredAddress *PreferredAddress + + OriginalDestinationConnectionID protocol.ConnectionID + InitialSourceConnectionID protocol.ConnectionID + RetrySourceConnectionID *protocol.ConnectionID // use a pointer here to distinguish zero-length connection IDs from missing transport parameters + + StatelessResetToken *protocol.StatelessResetToken + ActiveConnectionIDLimit uint64 + + MaxDatagramFrameSize protocol.ByteCount + + // only used internally + ClientOverride tls.TransportParameters // [UQUIC] +} + +// Unmarshal the transport parameters +func (p *TransportParameters) Unmarshal(data []byte, sentBy protocol.Perspective) error { + if err := p.unmarshal(bytes.NewReader(data), sentBy, false); err != nil { + return &qerr.TransportError{ + ErrorCode: qerr.TransportParameterError, + ErrorMessage: err.Error(), + } + } + return nil +} + +func (p *TransportParameters) unmarshal(r *bytes.Reader, sentBy protocol.Perspective, fromSessionTicket bool) error { + // needed to check that every parameter is only sent at most once + var parameterIDs []transportParameterID + + var ( + readOriginalDestinationConnectionID bool + readInitialSourceConnectionID bool + readActiveConnectionIDLimit bool + ) + + p.AckDelayExponent = protocol.DefaultAckDelayExponent + p.MaxAckDelay = protocol.DefaultMaxAckDelay + p.MaxDatagramFrameSize = protocol.InvalidByteCount + + for r.Len() > 0 { + paramIDInt, err := quicvarint.Read(r) + if err != nil { + return err + } + paramID := transportParameterID(paramIDInt) + paramLen, err := quicvarint.Read(r) + if err != nil { + return err + } + if uint64(r.Len()) < paramLen { + return fmt.Errorf("remaining length (%d) smaller than parameter length (%d)", r.Len(), paramLen) + } + parameterIDs = append(parameterIDs, paramID) + switch paramID { + case activeConnectionIDLimitParameterID: + readActiveConnectionIDLimit = true + fallthrough + case maxIdleTimeoutParameterID, + maxUDPPayloadSizeParameterID, + initialMaxDataParameterID, + initialMaxStreamDataBidiLocalParameterID, + initialMaxStreamDataBidiRemoteParameterID, + initialMaxStreamDataUniParameterID, + initialMaxStreamsBidiParameterID, + initialMaxStreamsUniParameterID, + maxAckDelayParameterID, + maxDatagramFrameSizeParameterID, + ackDelayExponentParameterID: + if err := p.readNumericTransportParameter(r, paramID, int(paramLen)); err != nil { + return err + } + case preferredAddressParameterID: + if sentBy == protocol.PerspectiveClient { + return errors.New("client sent a preferred_address") + } + if err := p.readPreferredAddress(r, int(paramLen)); err != nil { + return err + } + case disableActiveMigrationParameterID: + if paramLen != 0 { + return fmt.Errorf("wrong length for disable_active_migration: %d (expected empty)", paramLen) + } + p.DisableActiveMigration = true + case statelessResetTokenParameterID: + if sentBy == protocol.PerspectiveClient { + return errors.New("client sent a stateless_reset_token") + } + if paramLen != 16 { + return fmt.Errorf("wrong length for stateless_reset_token: %d (expected 16)", paramLen) + } + var token protocol.StatelessResetToken + r.Read(token[:]) + p.StatelessResetToken = &token + case originalDestinationConnectionIDParameterID: + if sentBy == protocol.PerspectiveClient { + return errors.New("client sent an original_destination_connection_id") + } + p.OriginalDestinationConnectionID, _ = protocol.ReadConnectionID(r, int(paramLen)) + readOriginalDestinationConnectionID = true + case initialSourceConnectionIDParameterID: + p.InitialSourceConnectionID, _ = protocol.ReadConnectionID(r, int(paramLen)) + readInitialSourceConnectionID = true + case retrySourceConnectionIDParameterID: + if sentBy == protocol.PerspectiveClient { + return errors.New("client sent a retry_source_connection_id") + } + connID, _ := protocol.ReadConnectionID(r, int(paramLen)) + p.RetrySourceConnectionID = &connID + default: + r.Seek(int64(paramLen), io.SeekCurrent) + } + } + + if !readActiveConnectionIDLimit { + p.ActiveConnectionIDLimit = protocol.DefaultActiveConnectionIDLimit + } + if !fromSessionTicket { + if sentBy == protocol.PerspectiveServer && !readOriginalDestinationConnectionID { + return errors.New("missing original_destination_connection_id") + } + if p.MaxUDPPayloadSize == 0 { + p.MaxUDPPayloadSize = protocol.MaxByteCount + } + if !readInitialSourceConnectionID { + return errors.New("missing initial_source_connection_id") + } + } + + // check that every transport parameter was sent at most once + sort.Slice(parameterIDs, func(i, j int) bool { return parameterIDs[i] < parameterIDs[j] }) + for i := 0; i < len(parameterIDs)-1; i++ { + if parameterIDs[i] == parameterIDs[i+1] { + return fmt.Errorf("received duplicate transport parameter %#x", parameterIDs[i]) + } + } + + return nil +} + +func (p *TransportParameters) readPreferredAddress(r *bytes.Reader, expectedLen int) error { + remainingLen := r.Len() + pa := &PreferredAddress{} + var ipv4 [4]byte + if _, err := io.ReadFull(r, ipv4[:]); err != nil { + return err + } + port, err := utils.BigEndian.ReadUint16(r) + if err != nil { + return err + } + pa.IPv4 = netip.AddrPortFrom(netip.AddrFrom4(ipv4), port) + var ipv6 [16]byte + if _, err := io.ReadFull(r, ipv6[:]); err != nil { + return err + } + port, err = utils.BigEndian.ReadUint16(r) + if err != nil { + return err + } + pa.IPv6 = netip.AddrPortFrom(netip.AddrFrom16(ipv6), port) + connIDLen, err := r.ReadByte() + if err != nil { + return err + } + if connIDLen == 0 || connIDLen > protocol.MaxConnIDLen { + return fmt.Errorf("invalid connection ID length: %d", connIDLen) + } + connID, err := protocol.ReadConnectionID(r, int(connIDLen)) + if err != nil { + return err + } + pa.ConnectionID = connID + if _, err := io.ReadFull(r, pa.StatelessResetToken[:]); err != nil { + return err + } + if bytesRead := remainingLen - r.Len(); bytesRead != expectedLen { + return fmt.Errorf("expected preferred_address to be %d long, read %d bytes", expectedLen, bytesRead) + } + p.PreferredAddress = pa + return nil +} + +func (p *TransportParameters) readNumericTransportParameter( + r *bytes.Reader, + paramID transportParameterID, + expectedLen int, +) error { + remainingLen := r.Len() + val, err := quicvarint.Read(r) + if err != nil { + return fmt.Errorf("error while reading transport parameter %d: %s", paramID, err) + } + if remainingLen-r.Len() != expectedLen { + return fmt.Errorf("inconsistent transport parameter length for transport parameter %#x", paramID) + } + //nolint:exhaustive // This only covers the numeric transport parameters. + switch paramID { + case initialMaxStreamDataBidiLocalParameterID: + p.InitialMaxStreamDataBidiLocal = protocol.ByteCount(val) + case initialMaxStreamDataBidiRemoteParameterID: + p.InitialMaxStreamDataBidiRemote = protocol.ByteCount(val) + case initialMaxStreamDataUniParameterID: + p.InitialMaxStreamDataUni = protocol.ByteCount(val) + case initialMaxDataParameterID: + p.InitialMaxData = protocol.ByteCount(val) + case initialMaxStreamsBidiParameterID: + p.MaxBidiStreamNum = protocol.StreamNum(val) + if p.MaxBidiStreamNum > protocol.MaxStreamCount { + return fmt.Errorf("initial_max_streams_bidi too large: %d (maximum %d)", p.MaxBidiStreamNum, protocol.MaxStreamCount) + } + case initialMaxStreamsUniParameterID: + p.MaxUniStreamNum = protocol.StreamNum(val) + if p.MaxUniStreamNum > protocol.MaxStreamCount { + return fmt.Errorf("initial_max_streams_uni too large: %d (maximum %d)", p.MaxUniStreamNum, protocol.MaxStreamCount) + } + case maxIdleTimeoutParameterID: + p.MaxIdleTimeout = max(protocol.MinRemoteIdleTimeout, time.Duration(val)*time.Millisecond) + case maxUDPPayloadSizeParameterID: + if val < 1200 { + return fmt.Errorf("invalid value for max_packet_size: %d (minimum 1200)", val) + } + p.MaxUDPPayloadSize = protocol.ByteCount(val) + case ackDelayExponentParameterID: + if val > protocol.MaxAckDelayExponent { + return fmt.Errorf("invalid value for ack_delay_exponent: %d (maximum %d)", val, protocol.MaxAckDelayExponent) + } + p.AckDelayExponent = uint8(val) + case maxAckDelayParameterID: + if val > uint64(protocol.MaxMaxAckDelay/time.Millisecond) { + return fmt.Errorf("invalid value for max_ack_delay: %dms (maximum %dms)", val, protocol.MaxMaxAckDelay/time.Millisecond) + } + p.MaxAckDelay = time.Duration(val) * time.Millisecond + case activeConnectionIDLimitParameterID: + if val < 2 { + return fmt.Errorf("invalid value for active_connection_id_limit: %d (minimum 2)", val) + } + p.ActiveConnectionIDLimit = val + case maxDatagramFrameSizeParameterID: + p.MaxDatagramFrameSize = protocol.ByteCount(val) + default: + return fmt.Errorf("TransportParameter BUG: transport parameter %d not found", paramID) + } + return nil +} + +// Marshal the transport parameters +func (p *TransportParameters) Marshal(pers protocol.Perspective) []byte { + // [UQUIC] + if p.ClientOverride != nil { + return p.ClientOverride.Marshal() + } + // [/UQUIC] + + // Typical Transport Parameters consume around 110 bytes, depending on the exact values, + // especially the lengths of the Connection IDs. + // Allocate 256 bytes, so we won't have to grow the slice in any case. + b := make([]byte, 0, 256) + + // add a greased value + random := make([]byte, 18) + rand.Read(random) + b = quicvarint.Append(b, 27+31*uint64(random[0])) + length := random[1] % 16 + b = quicvarint.Append(b, uint64(length)) + b = append(b, random[2:2+length]...) + + // initial_max_stream_data_bidi_local + b = p.marshalVarintParam(b, initialMaxStreamDataBidiLocalParameterID, uint64(p.InitialMaxStreamDataBidiLocal)) + // initial_max_stream_data_bidi_remote + b = p.marshalVarintParam(b, initialMaxStreamDataBidiRemoteParameterID, uint64(p.InitialMaxStreamDataBidiRemote)) + // initial_max_stream_data_uni + b = p.marshalVarintParam(b, initialMaxStreamDataUniParameterID, uint64(p.InitialMaxStreamDataUni)) + // initial_max_data + b = p.marshalVarintParam(b, initialMaxDataParameterID, uint64(p.InitialMaxData)) + // initial_max_bidi_streams + b = p.marshalVarintParam(b, initialMaxStreamsBidiParameterID, uint64(p.MaxBidiStreamNum)) + // initial_max_uni_streams + b = p.marshalVarintParam(b, initialMaxStreamsUniParameterID, uint64(p.MaxUniStreamNum)) + // idle_timeout + b = p.marshalVarintParam(b, maxIdleTimeoutParameterID, uint64(p.MaxIdleTimeout/time.Millisecond)) + // max_packet_size + b = p.marshalVarintParam(b, maxUDPPayloadSizeParameterID, uint64(protocol.MaxPacketBufferSize)) + // max_ack_delay + // Only send it if is different from the default value. + if p.MaxAckDelay != protocol.DefaultMaxAckDelay { + b = p.marshalVarintParam(b, maxAckDelayParameterID, uint64(p.MaxAckDelay/time.Millisecond)) + } + // ack_delay_exponent + // Only send it if is different from the default value. + if p.AckDelayExponent != protocol.DefaultAckDelayExponent { + b = p.marshalVarintParam(b, ackDelayExponentParameterID, uint64(p.AckDelayExponent)) + } + // disable_active_migration + if p.DisableActiveMigration { + b = quicvarint.Append(b, uint64(disableActiveMigrationParameterID)) + b = quicvarint.Append(b, 0) + } + if pers == protocol.PerspectiveServer { + // stateless_reset_token + if p.StatelessResetToken != nil { + b = quicvarint.Append(b, uint64(statelessResetTokenParameterID)) + b = quicvarint.Append(b, 16) + b = append(b, p.StatelessResetToken[:]...) + } + // original_destination_connection_id + b = quicvarint.Append(b, uint64(originalDestinationConnectionIDParameterID)) + b = quicvarint.Append(b, uint64(p.OriginalDestinationConnectionID.Len())) + b = append(b, p.OriginalDestinationConnectionID.Bytes()...) + // preferred_address + if p.PreferredAddress != nil { + b = quicvarint.Append(b, uint64(preferredAddressParameterID)) + b = quicvarint.Append(b, 4+2+16+2+1+uint64(p.PreferredAddress.ConnectionID.Len())+16) + ip4 := p.PreferredAddress.IPv4.Addr().As4() + b = append(b, ip4[:]...) + b = binary.BigEndian.AppendUint16(b, p.PreferredAddress.IPv4.Port()) + ip6 := p.PreferredAddress.IPv6.Addr().As16() + b = append(b, ip6[:]...) + b = binary.BigEndian.AppendUint16(b, p.PreferredAddress.IPv6.Port()) + b = append(b, uint8(p.PreferredAddress.ConnectionID.Len())) + b = append(b, p.PreferredAddress.ConnectionID.Bytes()...) + b = append(b, p.PreferredAddress.StatelessResetToken[:]...) + } + } + // active_connection_id_limit + if p.ActiveConnectionIDLimit != protocol.DefaultActiveConnectionIDLimit { + b = p.marshalVarintParam(b, activeConnectionIDLimitParameterID, p.ActiveConnectionIDLimit) + } + // initial_source_connection_id + b = quicvarint.Append(b, uint64(initialSourceConnectionIDParameterID)) + b = quicvarint.Append(b, uint64(p.InitialSourceConnectionID.Len())) + b = append(b, p.InitialSourceConnectionID.Bytes()...) + // retry_source_connection_id + if pers == protocol.PerspectiveServer && p.RetrySourceConnectionID != nil { + b = quicvarint.Append(b, uint64(retrySourceConnectionIDParameterID)) + b = quicvarint.Append(b, uint64(p.RetrySourceConnectionID.Len())) + b = append(b, p.RetrySourceConnectionID.Bytes()...) + } + if p.MaxDatagramFrameSize != protocol.InvalidByteCount { + b = p.marshalVarintParam(b, maxDatagramFrameSizeParameterID, uint64(p.MaxDatagramFrameSize)) + } + + if pers == protocol.PerspectiveClient && len(AdditionalTransportParametersClient) > 0 { + for k, v := range AdditionalTransportParametersClient { + b = quicvarint.Append(b, k) + b = quicvarint.Append(b, uint64(len(v))) + b = append(b, v...) + } + } + + return b +} + +func (p *TransportParameters) marshalVarintParam(b []byte, id transportParameterID, val uint64) []byte { + b = quicvarint.Append(b, uint64(id)) + b = quicvarint.Append(b, uint64(quicvarint.Len(val))) + return quicvarint.Append(b, val) +} + +// MarshalForSessionTicket marshals the transport parameters we save in the session ticket. +// When sending a 0-RTT enabled TLS session tickets, we need to save the transport parameters. +// The client will remember the transport parameters used in the last session, +// and apply those to the 0-RTT data it sends. +// Saving the transport parameters in the ticket gives the server the option to reject 0-RTT +// if the transport parameters changed. +// Since the session ticket is encrypted, the serialization format is defined by the server. +// For convenience, we use the same format that we also use for sending the transport parameters. +func (p *TransportParameters) MarshalForSessionTicket(b []byte) []byte { + // [UQUIC] + if p.ClientOverride != nil { + return p.ClientOverride.Marshal() // TODO: does this work as expected? test needed + } + // [/UQUIC] + + b = quicvarint.Append(b, transportParameterMarshalingVersion) + + // initial_max_stream_data_bidi_local + b = p.marshalVarintParam(b, initialMaxStreamDataBidiLocalParameterID, uint64(p.InitialMaxStreamDataBidiLocal)) + // initial_max_stream_data_bidi_remote + b = p.marshalVarintParam(b, initialMaxStreamDataBidiRemoteParameterID, uint64(p.InitialMaxStreamDataBidiRemote)) + // initial_max_stream_data_uni + b = p.marshalVarintParam(b, initialMaxStreamDataUniParameterID, uint64(p.InitialMaxStreamDataUni)) + // initial_max_data + b = p.marshalVarintParam(b, initialMaxDataParameterID, uint64(p.InitialMaxData)) + // initial_max_bidi_streams + b = p.marshalVarintParam(b, initialMaxStreamsBidiParameterID, uint64(p.MaxBidiStreamNum)) + // initial_max_uni_streams + b = p.marshalVarintParam(b, initialMaxStreamsUniParameterID, uint64(p.MaxUniStreamNum)) + // max_datagram_frame_size + if p.MaxDatagramFrameSize != protocol.InvalidByteCount { + b = p.marshalVarintParam(b, maxDatagramFrameSizeParameterID, uint64(p.MaxDatagramFrameSize)) + } + // active_connection_id_limit + return p.marshalVarintParam(b, activeConnectionIDLimitParameterID, p.ActiveConnectionIDLimit) +} + +// UnmarshalFromSessionTicket unmarshals transport parameters from a session ticket. +func (p *TransportParameters) UnmarshalFromSessionTicket(r *bytes.Reader) error { + version, err := quicvarint.Read(r) + if err != nil { + return err + } + if version != transportParameterMarshalingVersion { + return fmt.Errorf("unknown transport parameter marshaling version: %d", version) + } + return p.unmarshal(r, protocol.PerspectiveServer, true) +} + +// ValidFor0RTT checks if the transport parameters match those saved in the session ticket. +func (p *TransportParameters) ValidFor0RTT(saved *TransportParameters) bool { + if saved.MaxDatagramFrameSize != protocol.InvalidByteCount && (p.MaxDatagramFrameSize == protocol.InvalidByteCount || p.MaxDatagramFrameSize < saved.MaxDatagramFrameSize) { + return false + } + return p.InitialMaxStreamDataBidiLocal >= saved.InitialMaxStreamDataBidiLocal && + p.InitialMaxStreamDataBidiRemote >= saved.InitialMaxStreamDataBidiRemote && + p.InitialMaxStreamDataUni >= saved.InitialMaxStreamDataUni && + p.InitialMaxData >= saved.InitialMaxData && + p.MaxBidiStreamNum >= saved.MaxBidiStreamNum && + p.MaxUniStreamNum >= saved.MaxUniStreamNum && + p.ActiveConnectionIDLimit == saved.ActiveConnectionIDLimit +} + +// ValidForUpdate checks that the new transport parameters don't reduce limits after resuming a 0-RTT connection. +// It is only used on the client side. +func (p *TransportParameters) ValidForUpdate(saved *TransportParameters) bool { + if saved.MaxDatagramFrameSize != protocol.InvalidByteCount && (p.MaxDatagramFrameSize == protocol.InvalidByteCount || p.MaxDatagramFrameSize < saved.MaxDatagramFrameSize) { + return false + } + return p.ActiveConnectionIDLimit >= saved.ActiveConnectionIDLimit && + p.InitialMaxData >= saved.InitialMaxData && + p.InitialMaxStreamDataBidiLocal >= saved.InitialMaxStreamDataBidiLocal && + p.InitialMaxStreamDataBidiRemote >= saved.InitialMaxStreamDataBidiRemote && + p.InitialMaxStreamDataUni >= saved.InitialMaxStreamDataUni && + p.MaxBidiStreamNum >= saved.MaxBidiStreamNum && + p.MaxUniStreamNum >= saved.MaxUniStreamNum +} + +// String returns a string representation, intended for logging. +func (p *TransportParameters) String() string { + logString := "&wire.TransportParameters{OriginalDestinationConnectionID: %s, InitialSourceConnectionID: %s, " + logParams := []interface{}{p.OriginalDestinationConnectionID, p.InitialSourceConnectionID} + if p.RetrySourceConnectionID != nil { + logString += "RetrySourceConnectionID: %s, " + logParams = append(logParams, p.RetrySourceConnectionID) + } + logString += "InitialMaxStreamDataBidiLocal: %d, InitialMaxStreamDataBidiRemote: %d, InitialMaxStreamDataUni: %d, InitialMaxData: %d, MaxBidiStreamNum: %d, MaxUniStreamNum: %d, MaxIdleTimeout: %s, AckDelayExponent: %d, MaxAckDelay: %s, ActiveConnectionIDLimit: %d" + logParams = append(logParams, []interface{}{p.InitialMaxStreamDataBidiLocal, p.InitialMaxStreamDataBidiRemote, p.InitialMaxStreamDataUni, p.InitialMaxData, p.MaxBidiStreamNum, p.MaxUniStreamNum, p.MaxIdleTimeout, p.AckDelayExponent, p.MaxAckDelay, p.ActiveConnectionIDLimit}...) + if p.StatelessResetToken != nil { // the client never sends a stateless reset token + logString += ", StatelessResetToken: %#x" + logParams = append(logParams, *p.StatelessResetToken) + } + if p.MaxDatagramFrameSize != protocol.InvalidByteCount { + logString += ", MaxDatagramFrameSize: %d" + logParams = append(logParams, p.MaxDatagramFrameSize) + } + logString += "}" + return fmt.Sprintf(logString, logParams...) +} + +func (tp *TransportParameters) PopulateFromUQUIC(quicparams tls.TransportParameters) { + for pIdx, param := range quicparams { + switch param.ID() { + case uint64(maxIdleTimeoutParameterID): + tp.MaxIdleTimeout = time.Duration(param.(tls.MaxIdleTimeout)) * time.Millisecond + case uint64(initialMaxDataParameterID): + tp.InitialMaxData = protocol.ByteCount(param.(tls.InitialMaxData)) + case uint64(initialMaxStreamDataBidiLocalParameterID): + tp.InitialMaxStreamDataBidiLocal = protocol.ByteCount(param.(tls.InitialMaxStreamDataBidiLocal)) + case uint64(initialMaxStreamDataBidiRemoteParameterID): + tp.InitialMaxStreamDataBidiRemote = protocol.ByteCount(param.(tls.InitialMaxStreamDataBidiRemote)) + case uint64(initialMaxStreamDataUniParameterID): + tp.InitialMaxStreamDataUni = protocol.ByteCount(param.(tls.InitialMaxStreamDataUni)) + case uint64(initialMaxStreamsBidiParameterID): + tp.MaxBidiStreamNum = protocol.StreamNum(param.(tls.InitialMaxStreamsBidi)) + case uint64(initialMaxStreamsUniParameterID): + tp.MaxUniStreamNum = protocol.StreamNum(param.(tls.InitialMaxStreamsUni)) + case uint64(maxAckDelayParameterID): + tp.MaxAckDelay = time.Duration(param.(tls.MaxAckDelay)) * time.Millisecond + case uint64(disableActiveMigrationParameterID): + tp.DisableActiveMigration = true + case uint64(activeConnectionIDLimitParameterID): + tp.ActiveConnectionIDLimit = uint64(param.(tls.ActiveConnectionIDLimit)) + case uint64(initialSourceConnectionIDParameterID): + srcConnIDOverride, ok := param.(tls.InitialSourceConnectionID) + if ok { + if len(srcConnIDOverride) > 0 { // when nil/empty, will leave default srcConnID + tp.InitialSourceConnectionID = protocol.ParseConnectionID(srcConnIDOverride) + } else { + // reversely populate the transport parameter, for it must be written to network + quicparams[pIdx] = tls.InitialSourceConnectionID(tp.InitialSourceConnectionID.Bytes()) + } + } + case uint64(maxDatagramFrameSizeParameterID): + tp.MaxDatagramFrameSize = protocol.ByteCount(param.(tls.MaxDatagramFrameSize)) + default: + // ignore unknown parameters + continue + } + } + + tp.ClientOverride = quicparams +} diff --git a/backend/vendor/github.com/enetx/uquic/internal/wire/version_negotiation.go b/backend/vendor/github.com/enetx/uquic/internal/wire/version_negotiation.go new file mode 100644 index 0000000..2a2b84f --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/internal/wire/version_negotiation.go @@ -0,0 +1,53 @@ +package wire + +import ( + "crypto/rand" + "encoding/binary" + "errors" + + "github.com/enetx/uquic/internal/protocol" +) + +// ParseVersionNegotiationPacket parses a Version Negotiation packet. +func ParseVersionNegotiationPacket(b []byte) (dest, src protocol.ArbitraryLenConnectionID, _ []protocol.Version, _ error) { + n, dest, src, err := ParseArbitraryLenConnectionIDs(b) + if err != nil { + return nil, nil, nil, err + } + b = b[n:] + if len(b) == 0 { + //nolint:stylecheck + return nil, nil, nil, errors.New("Version Negotiation packet has empty version list") + } + if len(b)%4 != 0 { + //nolint:stylecheck + return nil, nil, nil, errors.New("Version Negotiation packet has a version list with an invalid length") + } + versions := make([]protocol.Version, len(b)/4) + for i := 0; len(b) > 0; i++ { + versions[i] = protocol.Version(binary.BigEndian.Uint32(b[:4])) + b = b[4:] + } + return dest, src, versions, nil +} + +// ComposeVersionNegotiation composes a Version Negotiation +func ComposeVersionNegotiation(destConnID, srcConnID protocol.ArbitraryLenConnectionID, versions []protocol.Version) []byte { + greasedVersions := protocol.GetGreasedVersions(versions) + expectedLen := 1 /* type byte */ + 4 /* version field */ + 1 /* dest connection ID length field */ + destConnID.Len() + 1 /* src connection ID length field */ + srcConnID.Len() + len(greasedVersions)*4 + buf := make([]byte, 1+4 /* type byte and version field */, expectedLen) + _, _ = rand.Read(buf[:1]) // ignore the error here. It is not critical to have perfect random here. + // Setting the "QUIC bit" (0x40) is not required by the RFC, + // but it allows clients to demultiplex QUIC with a long list of other protocols. + // See RFC 9443 and https://mailarchive.ietf.org/arch/msg/quic/oR4kxGKY6mjtPC1CZegY1ED4beg/ for details. + buf[0] |= 0xc0 + // The next 4 bytes are left at 0 (version number). + buf = append(buf, uint8(destConnID.Len())) + buf = append(buf, destConnID.Bytes()...) + buf = append(buf, uint8(srcConnID.Len())) + buf = append(buf, srcConnID.Bytes()...) + for _, v := range greasedVersions { + buf = binary.BigEndian.AppendUint32(buf, uint32(v)) + } + return buf +} diff --git a/backend/vendor/github.com/enetx/uquic/logging/connection_tracer.go b/backend/vendor/github.com/enetx/uquic/logging/connection_tracer.go new file mode 100644 index 0000000..7f54d6c --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/logging/connection_tracer.go @@ -0,0 +1,263 @@ +package logging + +import ( + "net" + "time" +) + +// A ConnectionTracer records events. +type ConnectionTracer struct { + StartedConnection func(local, remote net.Addr, srcConnID, destConnID ConnectionID) + NegotiatedVersion func(chosen VersionNumber, clientVersions, serverVersions []VersionNumber) + ClosedConnection func(error) + SentTransportParameters func(*TransportParameters) + ReceivedTransportParameters func(*TransportParameters) + RestoredTransportParameters func(parameters *TransportParameters) // for 0-RTT + SentLongHeaderPacket func(*ExtendedHeader, ByteCount, ECN, *AckFrame, []Frame) + SentShortHeaderPacket func(*ShortHeader, ByteCount, ECN, *AckFrame, []Frame) + ReceivedVersionNegotiationPacket func(dest, src ArbitraryLenConnectionID, _ []VersionNumber) + ReceivedRetry func(*Header) + ReceivedLongHeaderPacket func(*ExtendedHeader, ByteCount, ECN, []Frame) + ReceivedShortHeaderPacket func(*ShortHeader, ByteCount, ECN, []Frame) + BufferedPacket func(PacketType, ByteCount) + DroppedPacket func(PacketType, PacketNumber, ByteCount, PacketDropReason) + UpdatedMetrics func(rttStats *RTTStats, cwnd, bytesInFlight ByteCount, packetsInFlight int) + AcknowledgedPacket func(EncryptionLevel, PacketNumber) + LostPacket func(EncryptionLevel, PacketNumber, PacketLossReason) + UpdatedCongestionState func(CongestionState) + UpdatedPTOCount func(value uint32) + UpdatedKeyFromTLS func(EncryptionLevel, Perspective) + UpdatedKey func(keyPhase KeyPhase, remote bool) + DroppedEncryptionLevel func(EncryptionLevel) + DroppedKey func(keyPhase KeyPhase) + SetLossTimer func(TimerType, EncryptionLevel, time.Time) + LossTimerExpired func(TimerType, EncryptionLevel) + LossTimerCanceled func() + ECNStateUpdated func(state ECNState, trigger ECNStateTrigger) + ChoseALPN func(protocol string) + // Close is called when the connection is closed. + Close func() + Debug func(name, msg string) +} + +// NewMultiplexedConnectionTracer creates a new connection tracer that multiplexes events to multiple tracers. +func NewMultiplexedConnectionTracer(tracers ...*ConnectionTracer) *ConnectionTracer { + if len(tracers) == 0 { + return nil + } + if len(tracers) == 1 { + return tracers[0] + } + return &ConnectionTracer{ + StartedConnection: func(local, remote net.Addr, srcConnID, destConnID ConnectionID) { + for _, t := range tracers { + if t.StartedConnection != nil { + t.StartedConnection(local, remote, srcConnID, destConnID) + } + } + }, + NegotiatedVersion: func(chosen VersionNumber, clientVersions, serverVersions []VersionNumber) { + for _, t := range tracers { + if t.NegotiatedVersion != nil { + t.NegotiatedVersion(chosen, clientVersions, serverVersions) + } + } + }, + ClosedConnection: func(e error) { + for _, t := range tracers { + if t.ClosedConnection != nil { + t.ClosedConnection(e) + } + } + }, + SentTransportParameters: func(tp *TransportParameters) { + for _, t := range tracers { + if t.SentTransportParameters != nil { + t.SentTransportParameters(tp) + } + } + }, + ReceivedTransportParameters: func(tp *TransportParameters) { + for _, t := range tracers { + if t.ReceivedTransportParameters != nil { + t.ReceivedTransportParameters(tp) + } + } + }, + RestoredTransportParameters: func(tp *TransportParameters) { + for _, t := range tracers { + if t.RestoredTransportParameters != nil { + t.RestoredTransportParameters(tp) + } + } + }, + SentLongHeaderPacket: func(hdr *ExtendedHeader, size ByteCount, ecn ECN, ack *AckFrame, frames []Frame) { + for _, t := range tracers { + if t.SentLongHeaderPacket != nil { + t.SentLongHeaderPacket(hdr, size, ecn, ack, frames) + } + } + }, + SentShortHeaderPacket: func(hdr *ShortHeader, size ByteCount, ecn ECN, ack *AckFrame, frames []Frame) { + for _, t := range tracers { + if t.SentShortHeaderPacket != nil { + t.SentShortHeaderPacket(hdr, size, ecn, ack, frames) + } + } + }, + ReceivedVersionNegotiationPacket: func(dest, src ArbitraryLenConnectionID, versions []VersionNumber) { + for _, t := range tracers { + if t.ReceivedVersionNegotiationPacket != nil { + t.ReceivedVersionNegotiationPacket(dest, src, versions) + } + } + }, + ReceivedRetry: func(hdr *Header) { + for _, t := range tracers { + if t.ReceivedRetry != nil { + t.ReceivedRetry(hdr) + } + } + }, + ReceivedLongHeaderPacket: func(hdr *ExtendedHeader, size ByteCount, ecn ECN, frames []Frame) { + for _, t := range tracers { + if t.ReceivedLongHeaderPacket != nil { + t.ReceivedLongHeaderPacket(hdr, size, ecn, frames) + } + } + }, + ReceivedShortHeaderPacket: func(hdr *ShortHeader, size ByteCount, ecn ECN, frames []Frame) { + for _, t := range tracers { + if t.ReceivedShortHeaderPacket != nil { + t.ReceivedShortHeaderPacket(hdr, size, ecn, frames) + } + } + }, + BufferedPacket: func(typ PacketType, size ByteCount) { + for _, t := range tracers { + if t.BufferedPacket != nil { + t.BufferedPacket(typ, size) + } + } + }, + DroppedPacket: func(typ PacketType, pn PacketNumber, size ByteCount, reason PacketDropReason) { + for _, t := range tracers { + if t.DroppedPacket != nil { + t.DroppedPacket(typ, pn, size, reason) + } + } + }, + UpdatedMetrics: func(rttStats *RTTStats, cwnd, bytesInFlight ByteCount, packetsInFlight int) { + for _, t := range tracers { + if t.UpdatedMetrics != nil { + t.UpdatedMetrics(rttStats, cwnd, bytesInFlight, packetsInFlight) + } + } + }, + AcknowledgedPacket: func(encLevel EncryptionLevel, pn PacketNumber) { + for _, t := range tracers { + if t.AcknowledgedPacket != nil { + t.AcknowledgedPacket(encLevel, pn) + } + } + }, + LostPacket: func(encLevel EncryptionLevel, pn PacketNumber, reason PacketLossReason) { + for _, t := range tracers { + if t.LostPacket != nil { + t.LostPacket(encLevel, pn, reason) + } + } + }, + UpdatedCongestionState: func(state CongestionState) { + for _, t := range tracers { + if t.UpdatedCongestionState != nil { + t.UpdatedCongestionState(state) + } + } + }, + UpdatedPTOCount: func(value uint32) { + for _, t := range tracers { + if t.UpdatedPTOCount != nil { + t.UpdatedPTOCount(value) + } + } + }, + UpdatedKeyFromTLS: func(encLevel EncryptionLevel, perspective Perspective) { + for _, t := range tracers { + if t.UpdatedKeyFromTLS != nil { + t.UpdatedKeyFromTLS(encLevel, perspective) + } + } + }, + UpdatedKey: func(generation KeyPhase, remote bool) { + for _, t := range tracers { + if t.UpdatedKey != nil { + t.UpdatedKey(generation, remote) + } + } + }, + DroppedEncryptionLevel: func(encLevel EncryptionLevel) { + for _, t := range tracers { + if t.DroppedEncryptionLevel != nil { + t.DroppedEncryptionLevel(encLevel) + } + } + }, + DroppedKey: func(generation KeyPhase) { + for _, t := range tracers { + if t.DroppedKey != nil { + t.DroppedKey(generation) + } + } + }, + SetLossTimer: func(typ TimerType, encLevel EncryptionLevel, exp time.Time) { + for _, t := range tracers { + if t.SetLossTimer != nil { + t.SetLossTimer(typ, encLevel, exp) + } + } + }, + LossTimerExpired: func(typ TimerType, encLevel EncryptionLevel) { + for _, t := range tracers { + if t.LossTimerExpired != nil { + t.LossTimerExpired(typ, encLevel) + } + } + }, + LossTimerCanceled: func() { + for _, t := range tracers { + if t.LossTimerCanceled != nil { + t.LossTimerCanceled() + } + } + }, + ECNStateUpdated: func(state ECNState, trigger ECNStateTrigger) { + for _, t := range tracers { + if t.ECNStateUpdated != nil { + t.ECNStateUpdated(state, trigger) + } + } + }, + ChoseALPN: func(protocol string) { + for _, t := range tracers { + if t.ChoseALPN != nil { + t.ChoseALPN(protocol) + } + } + }, + Close: func() { + for _, t := range tracers { + if t.Close != nil { + t.Close() + } + } + }, + Debug: func(name, msg string) { + for _, t := range tracers { + if t.Debug != nil { + t.Debug(name, msg) + } + } + }, + } +} diff --git a/backend/vendor/github.com/enetx/uquic/logging/frame.go b/backend/vendor/github.com/enetx/uquic/logging/frame.go new file mode 100644 index 0000000..8173d9e --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/logging/frame.go @@ -0,0 +1,66 @@ +package logging + +import "github.com/enetx/uquic/internal/wire" + +// A Frame is a QUIC frame +type Frame interface{} + +// The AckRange is used within the AckFrame. +// It is a range of packet numbers that is being acknowledged. +type AckRange = wire.AckRange + +type ( + // An AckFrame is an ACK frame. + AckFrame = wire.AckFrame + // A ConnectionCloseFrame is a CONNECTION_CLOSE frame. + ConnectionCloseFrame = wire.ConnectionCloseFrame + // A DataBlockedFrame is a DATA_BLOCKED frame. + DataBlockedFrame = wire.DataBlockedFrame + // A HandshakeDoneFrame is a HANDSHAKE_DONE frame. + HandshakeDoneFrame = wire.HandshakeDoneFrame + // A MaxDataFrame is a MAX_DATA frame. + MaxDataFrame = wire.MaxDataFrame + // A MaxStreamDataFrame is a MAX_STREAM_DATA frame. + MaxStreamDataFrame = wire.MaxStreamDataFrame + // A MaxStreamsFrame is a MAX_STREAMS_FRAME. + MaxStreamsFrame = wire.MaxStreamsFrame + // A NewConnectionIDFrame is a NEW_CONNECTION_ID frame. + NewConnectionIDFrame = wire.NewConnectionIDFrame + // A NewTokenFrame is a NEW_TOKEN frame. + NewTokenFrame = wire.NewTokenFrame + // A PathChallengeFrame is a PATH_CHALLENGE frame. + PathChallengeFrame = wire.PathChallengeFrame + // A PathResponseFrame is a PATH_RESPONSE frame. + PathResponseFrame = wire.PathResponseFrame + // A PingFrame is a PING frame. + PingFrame = wire.PingFrame + // A ResetStreamFrame is a RESET_STREAM frame. + ResetStreamFrame = wire.ResetStreamFrame + // A RetireConnectionIDFrame is a RETIRE_CONNECTION_ID frame. + RetireConnectionIDFrame = wire.RetireConnectionIDFrame + // A StopSendingFrame is a STOP_SENDING frame. + StopSendingFrame = wire.StopSendingFrame + // A StreamsBlockedFrame is a STREAMS_BLOCKED frame. + StreamsBlockedFrame = wire.StreamsBlockedFrame + // A StreamDataBlockedFrame is a STREAM_DATA_BLOCKED frame. + StreamDataBlockedFrame = wire.StreamDataBlockedFrame +) + +// A CryptoFrame is a CRYPTO frame. +type CryptoFrame struct { + Offset ByteCount + Length ByteCount +} + +// A StreamFrame is a STREAM frame. +type StreamFrame struct { + StreamID StreamID + Offset ByteCount + Length ByteCount + Fin bool +} + +// A DatagramFrame is a DATAGRAM frame. +type DatagramFrame struct { + Length ByteCount +} diff --git a/backend/vendor/github.com/enetx/uquic/logging/interface.go b/backend/vendor/github.com/enetx/uquic/logging/interface.go new file mode 100644 index 0000000..ae5dd13 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/logging/interface.go @@ -0,0 +1,111 @@ +// Package logging defines a logging interface for quic-go. +// This package should not be considered stable +package logging + +import ( + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/internal/wire" +) + +type ( + // A ByteCount is used to count bytes. + ByteCount = protocol.ByteCount + // ECN is the ECN value + ECN = protocol.ECN + // A ConnectionID is a QUIC Connection ID. + ConnectionID = protocol.ConnectionID + // An ArbitraryLenConnectionID is a QUIC Connection ID that can be up to 255 bytes long. + ArbitraryLenConnectionID = protocol.ArbitraryLenConnectionID + // The EncryptionLevel is the encryption level of a packet. + EncryptionLevel = protocol.EncryptionLevel + // The KeyPhase is the key phase of the 1-RTT keys. + KeyPhase = protocol.KeyPhase + // The KeyPhaseBit is the value of the key phase bit of the 1-RTT packets. + KeyPhaseBit = protocol.KeyPhaseBit + // The PacketNumber is the packet number of a packet. + PacketNumber = protocol.PacketNumber + // The Perspective is the role of a QUIC endpoint (client or server). + Perspective = protocol.Perspective + // A StatelessResetToken is a stateless reset token. + StatelessResetToken = protocol.StatelessResetToken + // The StreamID is the stream ID. + StreamID = protocol.StreamID + // The StreamNum is the number of the stream. + StreamNum = protocol.StreamNum + // The StreamType is the type of the stream (unidirectional or bidirectional). + StreamType = protocol.StreamType + // The VersionNumber is the QUIC version. + VersionNumber = protocol.Version + + // The Header is the QUIC packet header, before removing header protection. + Header = wire.Header + // The ExtendedHeader is the QUIC Long Header packet header, after removing header protection. + ExtendedHeader = wire.ExtendedHeader + // The TransportParameters are QUIC transport parameters. + TransportParameters = wire.TransportParameters + // The PreferredAddress is the preferred address sent in the transport parameters. + PreferredAddress = wire.PreferredAddress + + // A TransportError is a transport-level error code. + TransportError = qerr.TransportErrorCode + // An ApplicationError is an application-defined error code. + ApplicationError = qerr.TransportErrorCode + + // The RTTStats contain statistics used by the congestion controller. + RTTStats = utils.RTTStats +) + +const ( + // ECNUnsupported means that no ECN value was set / received + ECNUnsupported = protocol.ECNUnsupported + // ECTNot is Not-ECT + ECTNot = protocol.ECNNon + // ECT0 is ECT(0) + ECT0 = protocol.ECT0 + // ECT1 is ECT(1) + ECT1 = protocol.ECT1 + // ECNCE is CE + ECNCE = protocol.ECNCE +) + +const ( + // KeyPhaseZero is key phase bit 0 + KeyPhaseZero KeyPhaseBit = protocol.KeyPhaseZero + // KeyPhaseOne is key phase bit 1 + KeyPhaseOne KeyPhaseBit = protocol.KeyPhaseOne +) + +const ( + // PerspectiveServer is used for a QUIC server + PerspectiveServer Perspective = protocol.PerspectiveServer + // PerspectiveClient is used for a QUIC client + PerspectiveClient Perspective = protocol.PerspectiveClient +) + +const ( + // EncryptionInitial is the Initial encryption level + EncryptionInitial EncryptionLevel = protocol.EncryptionInitial + // EncryptionHandshake is the Handshake encryption level + EncryptionHandshake EncryptionLevel = protocol.EncryptionHandshake + // Encryption1RTT is the 1-RTT encryption level + Encryption1RTT EncryptionLevel = protocol.Encryption1RTT + // Encryption0RTT is the 0-RTT encryption level + Encryption0RTT EncryptionLevel = protocol.Encryption0RTT +) + +const ( + // StreamTypeUni is a unidirectional stream + StreamTypeUni = protocol.StreamTypeUni + // StreamTypeBidi is a bidirectional stream + StreamTypeBidi = protocol.StreamTypeBidi +) + +// The ShortHeader is the QUIC Short Header packet header, after removing header protection. +type ShortHeader struct { + DestConnectionID ConnectionID + PacketNumber PacketNumber + PacketNumberLen protocol.PacketNumberLen + KeyPhase KeyPhaseBit +} diff --git a/backend/vendor/github.com/enetx/uquic/logging/packet_header.go b/backend/vendor/github.com/enetx/uquic/logging/packet_header.go new file mode 100644 index 0000000..8dff230 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/logging/packet_header.go @@ -0,0 +1,24 @@ +package logging + +import ( + "github.com/enetx/uquic/internal/protocol" +) + +// PacketTypeFromHeader determines the packet type from a *wire.Header. +func PacketTypeFromHeader(hdr *Header) PacketType { + if hdr.Version == 0 { + return PacketTypeVersionNegotiation + } + switch hdr.Type { + case protocol.PacketTypeInitial: + return PacketTypeInitial + case protocol.PacketTypeHandshake: + return PacketTypeHandshake + case protocol.PacketType0RTT: + return PacketType0RTT + case protocol.PacketTypeRetry: + return PacketTypeRetry + default: + return PacketTypeNotDetermined + } +} diff --git a/backend/vendor/github.com/enetx/uquic/logging/tracer.go b/backend/vendor/github.com/enetx/uquic/logging/tracer.go new file mode 100644 index 0000000..edd85db --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/logging/tracer.go @@ -0,0 +1,59 @@ +package logging + +import "net" + +// A Tracer traces events. +type Tracer struct { + SentPacket func(net.Addr, *Header, ByteCount, []Frame) + SentVersionNegotiationPacket func(_ net.Addr, dest, src ArbitraryLenConnectionID, _ []VersionNumber) + DroppedPacket func(net.Addr, PacketType, ByteCount, PacketDropReason) + Debug func(name, msg string) + Close func() +} + +// NewMultiplexedTracer creates a new tracer that multiplexes events to multiple tracers. +func NewMultiplexedTracer(tracers ...*Tracer) *Tracer { + if len(tracers) == 0 { + return nil + } + if len(tracers) == 1 { + return tracers[0] + } + return &Tracer{ + SentPacket: func(remote net.Addr, hdr *Header, size ByteCount, frames []Frame) { + for _, t := range tracers { + if t.SentPacket != nil { + t.SentPacket(remote, hdr, size, frames) + } + } + }, + SentVersionNegotiationPacket: func(remote net.Addr, dest, src ArbitraryLenConnectionID, versions []VersionNumber) { + for _, t := range tracers { + if t.SentVersionNegotiationPacket != nil { + t.SentVersionNegotiationPacket(remote, dest, src, versions) + } + } + }, + DroppedPacket: func(remote net.Addr, typ PacketType, size ByteCount, reason PacketDropReason) { + for _, t := range tracers { + if t.DroppedPacket != nil { + t.DroppedPacket(remote, typ, size, reason) + } + } + }, + Debug: func(name, msg string) { + for _, t := range tracers { + if t.Debug != nil { + t.Debug(name, msg) + } + } + }, + Close: func() { + for _, t := range tracers { + if t.Close != nil { + t.Close() + } + } + }, + } +} diff --git a/backend/vendor/github.com/enetx/uquic/logging/types.go b/backend/vendor/github.com/enetx/uquic/logging/types.go new file mode 100644 index 0000000..0d79b0a --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/logging/types.go @@ -0,0 +1,128 @@ +package logging + +// PacketType is the packet type of a QUIC packet +type PacketType uint8 + +const ( + // PacketTypeInitial is the packet type of an Initial packet + PacketTypeInitial PacketType = iota + // PacketTypeHandshake is the packet type of a Handshake packet + PacketTypeHandshake + // PacketTypeRetry is the packet type of a Retry packet + PacketTypeRetry + // PacketType0RTT is the packet type of a 0-RTT packet + PacketType0RTT + // PacketTypeVersionNegotiation is the packet type of a Version Negotiation packet + PacketTypeVersionNegotiation + // PacketType1RTT is a 1-RTT packet + PacketType1RTT + // PacketTypeStatelessReset is a stateless reset + PacketTypeStatelessReset + // PacketTypeNotDetermined is the packet type when it could not be determined + PacketTypeNotDetermined +) + +type PacketLossReason uint8 + +const ( + // PacketLossReorderingThreshold: when a packet is deemed lost due to reordering threshold + PacketLossReorderingThreshold PacketLossReason = iota + // PacketLossTimeThreshold: when a packet is deemed lost due to time threshold + PacketLossTimeThreshold +) + +type PacketDropReason uint8 + +const ( + // PacketDropKeyUnavailable is used when a packet is dropped because keys are unavailable + PacketDropKeyUnavailable PacketDropReason = iota + // PacketDropUnknownConnectionID is used when a packet is dropped because the connection ID is unknown + PacketDropUnknownConnectionID + // PacketDropHeaderParseError is used when a packet is dropped because header parsing failed + PacketDropHeaderParseError + // PacketDropPayloadDecryptError is used when a packet is dropped because decrypting the payload failed + PacketDropPayloadDecryptError + // PacketDropProtocolViolation is used when a packet is dropped due to a protocol violation + PacketDropProtocolViolation + // PacketDropDOSPrevention is used when a packet is dropped to mitigate a DoS attack + PacketDropDOSPrevention + // PacketDropUnsupportedVersion is used when a packet is dropped because the version is not supported + PacketDropUnsupportedVersion + // PacketDropUnexpectedPacket is used when an unexpected packet is received + PacketDropUnexpectedPacket + // PacketDropUnexpectedSourceConnectionID is used when a packet with an unexpected source connection ID is received + PacketDropUnexpectedSourceConnectionID + // PacketDropUnexpectedVersion is used when a packet with an unexpected version is received + PacketDropUnexpectedVersion + // PacketDropDuplicate is used when a duplicate packet is received + PacketDropDuplicate +) + +// TimerType is the type of the loss detection timer +type TimerType uint8 + +const ( + // TimerTypeACK is the timer type for the early retransmit timer + TimerTypeACK TimerType = iota + // TimerTypePTO is the timer type for the PTO retransmit timer + TimerTypePTO +) + +// TimeoutReason is the reason why a connection is closed +type TimeoutReason uint8 + +const ( + // TimeoutReasonHandshake is used when the connection is closed due to a handshake timeout + // This reason is not defined in the qlog draft, but very useful for debugging. + TimeoutReasonHandshake TimeoutReason = iota + // TimeoutReasonIdle is used when the connection is closed due to an idle timeout + // This reason is not defined in the qlog draft, but very useful for debugging. + TimeoutReasonIdle +) + +type CongestionState uint8 + +const ( + // CongestionStateSlowStart is the slow start phase of Reno / Cubic + CongestionStateSlowStart CongestionState = iota + // CongestionStateCongestionAvoidance is the slow start phase of Reno / Cubic + CongestionStateCongestionAvoidance + // CongestionStateRecovery is the recovery phase of Reno / Cubic + CongestionStateRecovery + // CongestionStateApplicationLimited means that the congestion controller is application limited + CongestionStateApplicationLimited +) + +// ECNState is the state of the ECN state machine (see Appendix A.4 of RFC 9000) +type ECNState uint8 + +const ( + // ECNStateTesting is the testing state + ECNStateTesting ECNState = 1 + iota + // ECNStateUnknown is the unknown state + ECNStateUnknown + // ECNStateFailed is the failed state + ECNStateFailed + // ECNStateCapable is the capable state + ECNStateCapable +) + +// ECNStateTrigger is a trigger for an ECN state transition. +type ECNStateTrigger uint8 + +const ( + ECNTriggerNoTrigger ECNStateTrigger = iota + // ECNFailedNoECNCounts is emitted when an ACK acknowledges ECN-marked packets, + // but doesn't contain any ECN counts + ECNFailedNoECNCounts + // ECNFailedDecreasedECNCounts is emitted when an ACK frame decreases ECN counts + ECNFailedDecreasedECNCounts + // ECNFailedLostAllTestingPackets is emitted when all ECN testing packets are declared lost + ECNFailedLostAllTestingPackets + // ECNFailedMoreECNCountsThanSent is emitted when an ACK contains more ECN counts than ECN-marked packets were sent + ECNFailedMoreECNCountsThanSent + // ECNFailedTooFewECNCounts is emitted when an ACK contains fewer ECN counts than it acknowledges packets + ECNFailedTooFewECNCounts + // ECNFailedManglingDetected is emitted when the path marks all ECN-marked packets as CE + ECNFailedManglingDetected +) diff --git a/backend/vendor/github.com/enetx/uquic/mockgen.go b/backend/vendor/github.com/enetx/uquic/mockgen.go new file mode 100644 index 0000000..81cc4a5 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/mockgen.go @@ -0,0 +1,76 @@ +//go:build gomock || generate + +package quic + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_send_conn_test.go github.com/quic-go/quic-go SendConn" +type SendConn = sendConn + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_raw_conn_test.go github.com/quic-go/quic-go RawConn" +type RawConn = rawConn + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_sender_test.go github.com/quic-go/quic-go Sender" +type Sender = sender + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_stream_internal_test.go github.com/quic-go/quic-go StreamI" +type StreamI = streamI + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_crypto_stream_test.go github.com/quic-go/quic-go CryptoStream" +type CryptoStream = cryptoStream + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_receive_stream_internal_test.go github.com/quic-go/quic-go ReceiveStreamI" +type ReceiveStreamI = receiveStreamI + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_send_stream_internal_test.go github.com/quic-go/quic-go SendStreamI" +type SendStreamI = sendStreamI + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_stream_getter_test.go github.com/quic-go/quic-go StreamGetter" +type StreamGetter = streamGetter + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_stream_sender_test.go github.com/quic-go/quic-go StreamSender" +type StreamSender = streamSender + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_crypto_data_handler_test.go github.com/quic-go/quic-go CryptoDataHandler" +type CryptoDataHandler = cryptoDataHandler + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_frame_source_test.go github.com/quic-go/quic-go FrameSource" +type FrameSource = frameSource + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_ack_frame_source_test.go github.com/quic-go/quic-go AckFrameSource" +type AckFrameSource = ackFrameSource + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_stream_manager_test.go github.com/quic-go/quic-go StreamManager" +type StreamManager = streamManager + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_sealing_manager_test.go github.com/quic-go/quic-go SealingManager" +type SealingManager = sealingManager + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_unpacker_test.go github.com/quic-go/quic-go Unpacker" +type Unpacker = unpacker + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_packer_test.go github.com/quic-go/quic-go Packer" +type Packer = packer + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_mtu_discoverer_test.go github.com/quic-go/quic-go MTUDiscoverer" +type MTUDiscoverer = mtuDiscoverer + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_conn_runner_test.go github.com/quic-go/quic-go ConnRunner" +type ConnRunner = connRunner + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_quic_conn_test.go github.com/quic-go/quic-go QUICConn" +type QUICConn = quicConn + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_packet_handler_test.go github.com/quic-go/quic-go PacketHandler" +type PacketHandler = packetHandler + +//go:generate sh -c "go run go.uber.org/mock/mockgen -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_packet_handler_manager_test.go github.com/quic-go/quic-go PacketHandlerManager" + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -build_flags=\"-tags=gomock\" -package quic -self_package github.com/quic-go/quic-go -destination mock_packet_handler_manager_test.go github.com/quic-go/quic-go PacketHandlerManager" +type PacketHandlerManager = packetHandlerManager + +// Need to use source mode for the batchConn, since reflect mode follows type aliases. +// See https://github.com/golang/mock/issues/244 for details. +// +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -package quic -self_package github.com/quic-go/quic-go -source sys_conn_oob.go -destination mock_batch_conn_test.go -mock_names batchConn=MockBatchConn" + +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -package quic -self_package github.com/quic-go/quic-go -self_package github.com/quic-go/quic-go -destination mock_token_store_test.go github.com/quic-go/quic-go TokenStore" +//go:generate sh -c "go run go.uber.org/mock/mockgen -typed -package quic -self_package github.com/quic-go/quic-go -self_package github.com/quic-go/quic-go -destination mock_packetconn_test.go net PacketConn" diff --git a/backend/vendor/github.com/enetx/uquic/mtu_discoverer.go b/backend/vendor/github.com/enetx/uquic/mtu_discoverer.go new file mode 100644 index 0000000..ccf5a08 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/mtu_discoverer.go @@ -0,0 +1,119 @@ +package quic + +import ( + "net" + "time" + + "github.com/enetx/uquic/internal/ackhandler" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/internal/wire" +) + +type mtuDiscoverer interface { + // Start starts the MTU discovery process. + // It's unnecessary to call ShouldSendProbe before that. + Start(maxPacketSize protocol.ByteCount) + ShouldSendProbe(now time.Time) bool + CurrentSize() protocol.ByteCount + GetPing() (ping ackhandler.Frame, datagramSize protocol.ByteCount) +} + +const ( + // At some point, we have to stop searching for a higher MTU. + // We're happy to send a packet that's 10 bytes smaller than the actual MTU. + maxMTUDiff = 20 + // send a probe packet every mtuProbeDelay RTTs + mtuProbeDelay = 5 +) + +func getMaxPacketSize(addr net.Addr) protocol.ByteCount { + maxSize := protocol.ByteCount(protocol.MinInitialPacketSize) + // If this is not a UDP address, we don't know anything about the MTU. + // Use the minimum size of an Initial packet as the max packet size. + if udpAddr, ok := addr.(*net.UDPAddr); ok { + if utils.IsIPv4(udpAddr.IP) { + maxSize = protocol.InitialPacketSizeIPv4 + } else { + maxSize = protocol.InitialPacketSizeIPv6 + } + } + return maxSize +} + +type mtuFinder struct { + lastProbeTime time.Time + mtuIncreased func(protocol.ByteCount) + + rttStats *utils.RTTStats + inFlight protocol.ByteCount // the size of the probe packet currently in flight. InvalidByteCount if none is in flight + current protocol.ByteCount + max protocol.ByteCount // the maximum value, as advertised by the peer (or our maximum size buffer) +} + +var _ mtuDiscoverer = &mtuFinder{} + +func newMTUDiscoverer(rttStats *utils.RTTStats, start protocol.ByteCount, mtuIncreased func(protocol.ByteCount)) *mtuFinder { + return &mtuFinder{ + inFlight: protocol.InvalidByteCount, + current: start, + rttStats: rttStats, + mtuIncreased: mtuIncreased, + } +} + +func (f *mtuFinder) done() bool { + return f.max-f.current <= maxMTUDiff+1 +} + +func (f *mtuFinder) Start(maxPacketSize protocol.ByteCount) { + f.lastProbeTime = time.Now() // makes sure the first probe packet is not sent immediately + f.max = maxPacketSize +} + +func (f *mtuFinder) ShouldSendProbe(now time.Time) bool { + if f.max == 0 || f.lastProbeTime.IsZero() { + return false + } + if f.inFlight != protocol.InvalidByteCount || f.done() { + return false + } + return !now.Before(f.lastProbeTime.Add(mtuProbeDelay * f.rttStats.SmoothedRTT())) +} + +func (f *mtuFinder) GetPing() (ackhandler.Frame, protocol.ByteCount) { + size := (f.max + f.current) / 2 + f.lastProbeTime = time.Now() + f.inFlight = size + return ackhandler.Frame{ + Frame: &wire.PingFrame{}, + Handler: (*mtuFinderAckHandler)(f), + }, size +} + +func (f *mtuFinder) CurrentSize() protocol.ByteCount { + return f.current +} + +type mtuFinderAckHandler mtuFinder + +var _ ackhandler.FrameHandler = &mtuFinderAckHandler{} + +func (h *mtuFinderAckHandler) OnAcked(wire.Frame) { + size := h.inFlight + if size == protocol.InvalidByteCount { + panic("OnAcked callback called although there's no MTU probe packet in flight") + } + h.inFlight = protocol.InvalidByteCount + h.current = size + h.mtuIncreased(size) +} + +func (h *mtuFinderAckHandler) OnLost(wire.Frame) { + size := h.inFlight + if size == protocol.InvalidByteCount { + panic("OnLost callback called although there's no MTU probe packet in flight") + } + h.max = size + h.inFlight = protocol.InvalidByteCount +} diff --git a/backend/vendor/github.com/enetx/uquic/multiplexer.go b/backend/vendor/github.com/enetx/uquic/multiplexer.go new file mode 100644 index 0000000..866cc17 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/multiplexer.go @@ -0,0 +1,75 @@ +package quic + +import ( + "fmt" + "net" + "sync" + + "github.com/enetx/uquic/internal/utils" +) + +var ( + connMuxerOnce sync.Once + connMuxer multiplexer +) + +type indexableConn interface{ LocalAddr() net.Addr } + +type multiplexer interface { + AddConn(conn indexableConn) + RemoveConn(indexableConn) error +} + +// The connMultiplexer listens on multiple net.PacketConns and dispatches +// incoming packets to the connection handler. +type connMultiplexer struct { + mutex sync.Mutex + + conns map[string] /* LocalAddr().String() */ indexableConn + logger utils.Logger +} + +var _ multiplexer = &connMultiplexer{} + +func getMultiplexer() multiplexer { + connMuxerOnce.Do(func() { + connMuxer = &connMultiplexer{ + conns: make(map[string]indexableConn), + logger: utils.DefaultLogger.WithPrefix("muxer"), + } + }) + return connMuxer +} + +func (m *connMultiplexer) index(addr net.Addr) string { + return addr.Network() + " " + addr.String() +} + +func (m *connMultiplexer) AddConn(c indexableConn) { + m.mutex.Lock() + defer m.mutex.Unlock() + + connIndex := m.index(c.LocalAddr()) + p, ok := m.conns[connIndex] + if ok { + // Panics if we're already listening on this connection. + // This is a safeguard because we're introducing a breaking API change, see + // https://github.com/enetx/uquic/issues/3727 for details. + // We'll remove this at a later time, when most users of the library have made the switch. + panic("connection already exists") // TODO: write a nice message + } + m.conns[connIndex] = p +} + +func (m *connMultiplexer) RemoveConn(c indexableConn) error { + m.mutex.Lock() + defer m.mutex.Unlock() + + connIndex := m.index(c.LocalAddr()) + if _, ok := m.conns[connIndex]; !ok { + return fmt.Errorf("cannote remove connection, connection is unknown") + } + + delete(m.conns, connIndex) + return nil +} diff --git a/backend/vendor/github.com/enetx/uquic/oss-fuzz.sh b/backend/vendor/github.com/enetx/uquic/oss-fuzz.sh new file mode 100644 index 0000000..b8748ba --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/oss-fuzz.sh @@ -0,0 +1,42 @@ +#!/bin/bash + +# Install Go manually, since oss-fuzz ships with an outdated Go version. +# See https://github.com/google/oss-fuzz/pull/10643. +export CXX="${CXX} -lresolv" # required by Go 1.20 +wget https://go.dev/dl/go1.22.0.linux-amd64.tar.gz \ + && mkdir temp-go \ + && rm -rf /root/.go/* \ + && tar -C temp-go/ -xzf go1.22.0.linux-amd64.tar.gz \ + && mv temp-go/go/* /root/.go/ \ + && rm -rf temp-go go1.22.0.linux-amd64.tar.gz + +( +# fuzz qpack +compile_go_fuzzer github.com/quic-go/qpack/fuzzing Fuzz qpack_fuzzer +) + +( +# fuzz quic-go +compile_go_fuzzer github.com/enetx/uquic/fuzzing/frames Fuzz frame_fuzzer +compile_go_fuzzer github.com/enetx/uquic/fuzzing/header Fuzz header_fuzzer +compile_go_fuzzer github.com/enetx/uquic/fuzzing/transportparameters Fuzz transportparameter_fuzzer +compile_go_fuzzer github.com/enetx/uquic/fuzzing/tokens Fuzz token_fuzzer +compile_go_fuzzer github.com/enetx/uquic/fuzzing/handshake Fuzz handshake_fuzzer + +if [ $SANITIZER == "coverage" ]; then + # no need for corpora if coverage + exit 0 +fi + +# generate seed corpora +cd $GOPATH/src/github.com/enetx/uquic/ +go generate -x ./fuzzing/... + +zip --quiet -r $OUT/header_fuzzer_seed_corpus.zip fuzzing/header/corpus +zip --quiet -r $OUT/frame_fuzzer_seed_corpus.zip fuzzing/frames/corpus +zip --quiet -r $OUT/transportparameter_fuzzer_seed_corpus.zip fuzzing/transportparameters/corpus +zip --quiet -r $OUT/handshake_fuzzer_seed_corpus.zip fuzzing/handshake/corpus +) + +# for debugging +ls -al $OUT diff --git a/backend/vendor/github.com/enetx/uquic/packet_handler_map.go b/backend/vendor/github.com/enetx/uquic/packet_handler_map.go new file mode 100644 index 0000000..37a807a --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/packet_handler_map.go @@ -0,0 +1,255 @@ +package quic + +import ( + "crypto/hmac" + "crypto/rand" + "crypto/sha256" + "hash" + "io" + "net" + "sync" + "time" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" +) + +type connCapabilities struct { + // This connection has the Don't Fragment (DF) bit set. + // This means it makes to run DPLPMTUD. + DF bool + // GSO (Generic Segmentation Offload) supported + GSO bool + // ECN (Explicit Congestion Notifications) supported + ECN bool +} + +// rawConn is a connection that allow reading of a receivedPackeh. +type rawConn interface { + ReadPacket() (receivedPacket, error) + // WritePacket writes a packet on the wire. + // gsoSize is the size of a single packet, or 0 to disable GSO. + // It is invalid to set gsoSize if capabilities.GSO is not set. + WritePacket(b []byte, addr net.Addr, packetInfoOOB []byte, gsoSize uint16, ecn protocol.ECN) (int, error) + LocalAddr() net.Addr + SetReadDeadline(time.Time) error + io.Closer + + capabilities() connCapabilities +} + +type closePacket struct { + payload []byte + addr net.Addr + info packetInfo +} + +type packetHandlerMap struct { + mutex sync.Mutex + handlers map[protocol.ConnectionID]packetHandler + resetTokens map[protocol.StatelessResetToken] /* stateless reset token */ packetHandler + + closed bool + closeChan chan struct{} + + enqueueClosePacket func(closePacket) + + deleteRetiredConnsAfter time.Duration + + statelessResetMutex sync.Mutex + statelessResetHasher hash.Hash + + logger utils.Logger +} + +var _ packetHandlerManager = &packetHandlerMap{} + +func newPacketHandlerMap(key *StatelessResetKey, enqueueClosePacket func(closePacket), logger utils.Logger) *packetHandlerMap { + h := &packetHandlerMap{ + closeChan: make(chan struct{}), + handlers: make(map[protocol.ConnectionID]packetHandler), + resetTokens: make(map[protocol.StatelessResetToken]packetHandler), + deleteRetiredConnsAfter: protocol.RetiredConnectionIDDeleteTimeout, + enqueueClosePacket: enqueueClosePacket, + logger: logger, + } + if key != nil { + h.statelessResetHasher = hmac.New(sha256.New, key[:]) + } + if h.logger.Debug() { + go h.logUsage() + } + return h +} + +func (h *packetHandlerMap) logUsage() { + ticker := time.NewTicker(2 * time.Second) + var printedZero bool + for { + select { + case <-h.closeChan: + return + case <-ticker.C: + } + + h.mutex.Lock() + numHandlers := len(h.handlers) + numTokens := len(h.resetTokens) + h.mutex.Unlock() + // If the number tracked handlers and tokens is zero, only print it a single time. + hasZero := numHandlers == 0 && numTokens == 0 + if !hasZero || (hasZero && !printedZero) { + h.logger.Debugf("Tracking %d connection IDs and %d reset tokens.\n", numHandlers, numTokens) + printedZero = false + if hasZero { + printedZero = true + } + } + } +} + +func (h *packetHandlerMap) Get(id protocol.ConnectionID) (packetHandler, bool) { + h.mutex.Lock() + defer h.mutex.Unlock() + + handler, ok := h.handlers[id] + return handler, ok +} + +func (h *packetHandlerMap) Add(id protocol.ConnectionID, handler packetHandler) bool /* was added */ { + h.mutex.Lock() + defer h.mutex.Unlock() + + if _, ok := h.handlers[id]; ok { + h.logger.Debugf("Not adding connection ID %s, as it already exists.", id) + return false + } + h.handlers[id] = handler + h.logger.Debugf("Adding connection ID %s.", id) + return true +} + +func (h *packetHandlerMap) AddWithConnID(clientDestConnID, newConnID protocol.ConnectionID, handler packetHandler) bool { + h.mutex.Lock() + defer h.mutex.Unlock() + + if _, ok := h.handlers[clientDestConnID]; ok { + h.logger.Debugf("Not adding connection ID %s for a new connection, as it already exists.", clientDestConnID) + return false + } + h.handlers[clientDestConnID] = handler + h.handlers[newConnID] = handler + h.logger.Debugf("Adding connection IDs %s and %s for a new connection.", clientDestConnID, newConnID) + return true +} + +func (h *packetHandlerMap) Remove(id protocol.ConnectionID) { + h.mutex.Lock() + delete(h.handlers, id) + h.mutex.Unlock() + h.logger.Debugf("Removing connection ID %s.", id) +} + +func (h *packetHandlerMap) Retire(id protocol.ConnectionID) { + h.logger.Debugf("Retiring connection ID %s in %s.", id, h.deleteRetiredConnsAfter) + time.AfterFunc(h.deleteRetiredConnsAfter, func() { + h.mutex.Lock() + delete(h.handlers, id) + h.mutex.Unlock() + h.logger.Debugf("Removing connection ID %s after it has been retired.", id) + }) +} + +// ReplaceWithClosed is called when a connection is closed. +// Depending on which side closed the connection, we need to: +// * remote close: absorb delayed packets +// * local close: retransmit the CONNECTION_CLOSE packet, in case it was lost +func (h *packetHandlerMap) ReplaceWithClosed(ids []protocol.ConnectionID, connClosePacket []byte) { + var handler packetHandler + if connClosePacket != nil { + handler = newClosedLocalConn( + func(addr net.Addr, info packetInfo) { + h.enqueueClosePacket(closePacket{payload: connClosePacket, addr: addr, info: info}) + }, + h.logger, + ) + } else { + handler = newClosedRemoteConn() + } + + h.mutex.Lock() + for _, id := range ids { + h.handlers[id] = handler + } + h.mutex.Unlock() + h.logger.Debugf("Replacing connection for connection IDs %s with a closed connection.", ids) + + time.AfterFunc(h.deleteRetiredConnsAfter, func() { + h.mutex.Lock() + for _, id := range ids { + delete(h.handlers, id) + } + h.mutex.Unlock() + h.logger.Debugf("Removing connection IDs %s for a closed connection after it has been retired.", ids) + }) +} + +func (h *packetHandlerMap) AddResetToken(token protocol.StatelessResetToken, handler packetHandler) { + h.mutex.Lock() + h.resetTokens[token] = handler + h.mutex.Unlock() +} + +func (h *packetHandlerMap) RemoveResetToken(token protocol.StatelessResetToken) { + h.mutex.Lock() + delete(h.resetTokens, token) + h.mutex.Unlock() +} + +func (h *packetHandlerMap) GetByResetToken(token protocol.StatelessResetToken) (packetHandler, bool) { + h.mutex.Lock() + defer h.mutex.Unlock() + + handler, ok := h.resetTokens[token] + return handler, ok +} + +func (h *packetHandlerMap) Close(e error) { + h.mutex.Lock() + + if h.closed { + h.mutex.Unlock() + return + } + + close(h.closeChan) + + var wg sync.WaitGroup + for _, handler := range h.handlers { + wg.Add(1) + go func(handler packetHandler) { + handler.destroy(e) + wg.Done() + }(handler) + } + h.closed = true + h.mutex.Unlock() + wg.Wait() +} + +func (h *packetHandlerMap) GetStatelessResetToken(connID protocol.ConnectionID) protocol.StatelessResetToken { + var token protocol.StatelessResetToken + if h.statelessResetHasher == nil { + // Return a random stateless reset token. + // This token will be sent in the server's transport parameters. + // By using a random token, an off-path attacker won't be able to disrupt the connection. + rand.Read(token[:]) + return token + } + h.statelessResetMutex.Lock() + h.statelessResetHasher.Write(connID.Bytes()) + copy(token[:], h.statelessResetHasher.Sum(nil)) + h.statelessResetHasher.Reset() + h.statelessResetMutex.Unlock() + return token +} diff --git a/backend/vendor/github.com/enetx/uquic/packet_packer.go b/backend/vendor/github.com/enetx/uquic/packet_packer.go new file mode 100644 index 0000000..91dc30f --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/packet_packer.go @@ -0,0 +1,910 @@ +package quic + +import ( + crand "crypto/rand" + "encoding/binary" + "errors" + "fmt" + + "github.com/enetx/uquic/internal/ackhandler" + "github.com/enetx/uquic/internal/handshake" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/wire" + "golang.org/x/exp/rand" +) + +var errNothingToPack = errors.New("nothing to pack") + +type packer interface { + PackCoalescedPacket(onlyAck bool, maxPacketSize protocol.ByteCount, v protocol.Version) (*coalescedPacket, error) + PackAckOnlyPacket(maxPacketSize protocol.ByteCount, v protocol.Version) (shortHeaderPacket, *packetBuffer, error) + AppendPacket(buf *packetBuffer, maxPacketSize protocol.ByteCount, v protocol.Version) (shortHeaderPacket, error) + MaybePackProbePacket(protocol.EncryptionLevel, protocol.ByteCount, protocol.Version) (*coalescedPacket, error) + PackConnectionClose(*qerr.TransportError, protocol.ByteCount, protocol.Version) (*coalescedPacket, error) + PackApplicationClose(*qerr.ApplicationError, protocol.ByteCount, protocol.Version) (*coalescedPacket, error) + PackMTUProbePacket(ping ackhandler.Frame, size protocol.ByteCount, v protocol.Version) (shortHeaderPacket, *packetBuffer, error) + + SetToken([]byte) +} + +type sealer interface { + handshake.LongHeaderSealer +} + +type payload struct { + streamFrames []ackhandler.StreamFrame + frames []ackhandler.Frame + ack *wire.AckFrame + length protocol.ByteCount +} + +type longHeaderPacket struct { + header *wire.ExtendedHeader + ack *wire.AckFrame + frames []ackhandler.Frame + streamFrames []ackhandler.StreamFrame // only used for 0-RTT packets + + length protocol.ByteCount +} + +type shortHeaderPacket struct { + PacketNumber protocol.PacketNumber + Frames []ackhandler.Frame + StreamFrames []ackhandler.StreamFrame + Ack *wire.AckFrame + Length protocol.ByteCount + IsPathMTUProbePacket bool + + // used for logging + DestConnID protocol.ConnectionID + PacketNumberLen protocol.PacketNumberLen + KeyPhase protocol.KeyPhaseBit +} + +func (p *shortHeaderPacket) IsAckEliciting() bool { return ackhandler.HasAckElicitingFrames(p.Frames) } + +type coalescedPacket struct { + buffer *packetBuffer + longHdrPackets []*longHeaderPacket + shortHdrPacket *shortHeaderPacket +} + +// IsOnlyShortHeaderPacket says if this packet only contains a short header packet (and no long header packets). +func (p *coalescedPacket) IsOnlyShortHeaderPacket() bool { + return len(p.longHdrPackets) == 0 && p.shortHdrPacket != nil +} + +func (p *longHeaderPacket) EncryptionLevel() protocol.EncryptionLevel { + //nolint:exhaustive // Will never be called for Retry packets (and they don't have encrypted data). + switch p.header.Type { + case protocol.PacketTypeInitial: + return protocol.EncryptionInitial + case protocol.PacketTypeHandshake: + return protocol.EncryptionHandshake + case protocol.PacketType0RTT: + return protocol.Encryption0RTT + default: + panic("can't determine encryption level") + } +} + +func (p *longHeaderPacket) IsAckEliciting() bool { return ackhandler.HasAckElicitingFrames(p.frames) } + +type packetNumberManager interface { + PeekPacketNumber(protocol.EncryptionLevel) (protocol.PacketNumber, protocol.PacketNumberLen) + PopPacketNumber(protocol.EncryptionLevel) protocol.PacketNumber +} + +type sealingManager interface { + GetInitialSealer() (handshake.LongHeaderSealer, error) + GetHandshakeSealer() (handshake.LongHeaderSealer, error) + Get0RTTSealer() (handshake.LongHeaderSealer, error) + Get1RTTSealer() (handshake.ShortHeaderSealer, error) +} + +type frameSource interface { + HasData() bool + AppendStreamFrames([]ackhandler.StreamFrame, protocol.ByteCount, protocol.Version) ([]ackhandler.StreamFrame, protocol.ByteCount) + AppendControlFrames([]ackhandler.Frame, protocol.ByteCount, protocol.Version) ([]ackhandler.Frame, protocol.ByteCount) +} + +type ackFrameSource interface { + GetAckFrame(encLevel protocol.EncryptionLevel, onlyIfQueued bool) *wire.AckFrame +} + +type packetPacker struct { + srcConnID protocol.ConnectionID + getDestConnID func() protocol.ConnectionID + + perspective protocol.Perspective + cryptoSetup sealingManager + + initialStream cryptoStream + handshakeStream cryptoStream + + token []byte + + pnManager packetNumberManager + framer frameSource + acks ackFrameSource + datagramQueue *datagramQueue + retransmissionQueue *retransmissionQueue + rand rand.Rand + + numNonAckElicitingAcks int +} + +var _ packer = &packetPacker{} + +func newPacketPacker( + srcConnID protocol.ConnectionID, + getDestConnID func() protocol.ConnectionID, + initialStream, handshakeStream cryptoStream, + packetNumberManager packetNumberManager, + retransmissionQueue *retransmissionQueue, + cryptoSetup sealingManager, + framer frameSource, + acks ackFrameSource, + datagramQueue *datagramQueue, + perspective protocol.Perspective, +) *packetPacker { + var b [8]byte + _, _ = crand.Read(b[:]) + + return &packetPacker{ + cryptoSetup: cryptoSetup, + getDestConnID: getDestConnID, + srcConnID: srcConnID, + initialStream: initialStream, + handshakeStream: handshakeStream, + retransmissionQueue: retransmissionQueue, + datagramQueue: datagramQueue, + perspective: perspective, + framer: framer, + acks: acks, + rand: *rand.New(rand.NewSource(binary.BigEndian.Uint64(b[:]))), + pnManager: packetNumberManager, + } +} + +// PackConnectionClose packs a packet that closes the connection with a transport error. +func (p *packetPacker) PackConnectionClose(e *qerr.TransportError, maxPacketSize protocol.ByteCount, v protocol.Version) (*coalescedPacket, error) { + var reason string + // don't send details of crypto errors + if !e.ErrorCode.IsCryptoError() { + reason = e.ErrorMessage + } + return p.packConnectionClose(false, uint64(e.ErrorCode), e.FrameType, reason, maxPacketSize, v) +} + +// PackApplicationClose packs a packet that closes the connection with an application error. +func (p *packetPacker) PackApplicationClose(e *qerr.ApplicationError, maxPacketSize protocol.ByteCount, v protocol.Version) (*coalescedPacket, error) { + return p.packConnectionClose(true, uint64(e.ErrorCode), 0, e.ErrorMessage, maxPacketSize, v) +} + +func (p *packetPacker) packConnectionClose( + isApplicationError bool, + errorCode uint64, + frameType uint64, + reason string, + maxPacketSize protocol.ByteCount, + v protocol.Version, +) (*coalescedPacket, error) { + var sealers [4]sealer + var hdrs [3]*wire.ExtendedHeader + var payloads [4]payload + var size protocol.ByteCount + var connID protocol.ConnectionID + var oneRTTPacketNumber protocol.PacketNumber + var oneRTTPacketNumberLen protocol.PacketNumberLen + var keyPhase protocol.KeyPhaseBit // only set for 1-RTT + var numLongHdrPackets uint8 + encLevels := [4]protocol.EncryptionLevel{protocol.EncryptionInitial, protocol.EncryptionHandshake, protocol.Encryption0RTT, protocol.Encryption1RTT} + for i, encLevel := range encLevels { + if p.perspective == protocol.PerspectiveServer && encLevel == protocol.Encryption0RTT { + continue + } + ccf := &wire.ConnectionCloseFrame{ + IsApplicationError: isApplicationError, + ErrorCode: errorCode, + FrameType: frameType, + ReasonPhrase: reason, + } + // don't send application errors in Initial or Handshake packets + if isApplicationError && (encLevel == protocol.EncryptionInitial || encLevel == protocol.EncryptionHandshake) { + ccf.IsApplicationError = false + ccf.ErrorCode = uint64(qerr.ApplicationErrorErrorCode) + ccf.ReasonPhrase = "" + } + pl := payload{ + frames: []ackhandler.Frame{{Frame: ccf}}, + length: ccf.Length(v), + } + + var sealer sealer + var err error + switch encLevel { + case protocol.EncryptionInitial: + sealer, err = p.cryptoSetup.GetInitialSealer() + case protocol.EncryptionHandshake: + sealer, err = p.cryptoSetup.GetHandshakeSealer() + case protocol.Encryption0RTT: + sealer, err = p.cryptoSetup.Get0RTTSealer() + case protocol.Encryption1RTT: + var s handshake.ShortHeaderSealer + s, err = p.cryptoSetup.Get1RTTSealer() + if err == nil { + keyPhase = s.KeyPhase() + } + sealer = s + } + if err == handshake.ErrKeysNotYetAvailable || err == handshake.ErrKeysDropped { + continue + } + if err != nil { + return nil, err + } + sealers[i] = sealer + var hdr *wire.ExtendedHeader + if encLevel == protocol.Encryption1RTT { + connID = p.getDestConnID() + oneRTTPacketNumber, oneRTTPacketNumberLen = p.pnManager.PeekPacketNumber(protocol.Encryption1RTT) + size += p.shortHeaderPacketLength(connID, oneRTTPacketNumberLen, pl) + } else { + hdr = p.getLongHeader(encLevel, v) + hdrs[i] = hdr + size += p.longHeaderPacketLength(hdr, pl, v) + protocol.ByteCount(sealer.Overhead()) + numLongHdrPackets++ + } + payloads[i] = pl + } + buffer := getPacketBuffer() + packet := &coalescedPacket{ + buffer: buffer, + longHdrPackets: make([]*longHeaderPacket, 0, numLongHdrPackets), + } + for i, encLevel := range encLevels { + if sealers[i] == nil { + continue + } + var paddingLen protocol.ByteCount + if encLevel == protocol.EncryptionInitial { + paddingLen = p.initialPaddingLen(payloads[i].frames, size, maxPacketSize) + } + if encLevel == protocol.Encryption1RTT { + shp, err := p.appendShortHeaderPacket(buffer, connID, oneRTTPacketNumber, oneRTTPacketNumberLen, keyPhase, payloads[i], paddingLen, maxPacketSize, sealers[i], false, v) + if err != nil { + return nil, err + } + packet.shortHdrPacket = &shp + } else { + longHdrPacket, err := p.appendLongHeaderPacket(buffer, hdrs[i], payloads[i], paddingLen, encLevel, sealers[i], v) + if err != nil { + return nil, err + } + packet.longHdrPackets = append(packet.longHdrPackets, longHdrPacket) + } + } + return packet, nil +} + +// longHeaderPacketLength calculates the length of a serialized long header packet. +// It takes into account that packets that have a tiny payload need to be padded, +// such that len(payload) + packet number len >= 4 + AEAD overhead +func (p *packetPacker) longHeaderPacketLength(hdr *wire.ExtendedHeader, pl payload, v protocol.Version) protocol.ByteCount { + var paddingLen protocol.ByteCount + pnLen := protocol.ByteCount(hdr.PacketNumberLen) + if pl.length < 4-pnLen { + paddingLen = 4 - pnLen - pl.length + } + return hdr.GetLength(v) + pl.length + paddingLen +} + +// shortHeaderPacketLength calculates the length of a serialized short header packet. +// It takes into account that packets that have a tiny payload need to be padded, +// such that len(payload) + packet number len >= 4 + AEAD overhead +func (p *packetPacker) shortHeaderPacketLength(connID protocol.ConnectionID, pnLen protocol.PacketNumberLen, pl payload) protocol.ByteCount { + var paddingLen protocol.ByteCount + if pl.length < 4-protocol.ByteCount(pnLen) { + paddingLen = 4 - protocol.ByteCount(pnLen) - pl.length + } + return wire.ShortHeaderLen(connID, pnLen) + pl.length + paddingLen +} + +// size is the expected size of the packet, if no padding was applied. +func (p *packetPacker) initialPaddingLen(frames []ackhandler.Frame, currentSize, maxPacketSize protocol.ByteCount) protocol.ByteCount { + // For the server, only ack-eliciting Initial packets need to be padded. + if p.perspective == protocol.PerspectiveServer && !ackhandler.HasAckElicitingFrames(frames) { + return 0 + } + if currentSize >= maxPacketSize { + return 0 + } + return maxPacketSize - currentSize +} + +// PackCoalescedPacket packs a new packet. +// It packs an Initial / Handshake if there is data to send in these packet number spaces. +// It should only be called before the handshake is confirmed. +func (p *packetPacker) PackCoalescedPacket(onlyAck bool, maxPacketSize protocol.ByteCount, v protocol.Version) (*coalescedPacket, error) { + var ( + initialHdr, handshakeHdr, zeroRTTHdr *wire.ExtendedHeader + initialPayload, handshakePayload, zeroRTTPayload, oneRTTPayload payload + oneRTTPacketNumber protocol.PacketNumber + oneRTTPacketNumberLen protocol.PacketNumberLen + ) + // Try packing an Initial packet. + initialSealer, err := p.cryptoSetup.GetInitialSealer() + if err != nil && err != handshake.ErrKeysDropped { + return nil, err + } + var size protocol.ByteCount + if initialSealer != nil { + initialHdr, initialPayload = p.maybeGetCryptoPacket(maxPacketSize-protocol.ByteCount(initialSealer.Overhead()), protocol.EncryptionInitial, onlyAck, true, v) + if initialPayload.length > 0 { + size += p.longHeaderPacketLength(initialHdr, initialPayload, v) + protocol.ByteCount(initialSealer.Overhead()) + } + } + + // Add a Handshake packet. + var handshakeSealer sealer + if (onlyAck && size == 0) || (!onlyAck && size < maxPacketSize-protocol.MinCoalescedPacketSize) { + var err error + handshakeSealer, err = p.cryptoSetup.GetHandshakeSealer() + if err != nil && err != handshake.ErrKeysDropped && err != handshake.ErrKeysNotYetAvailable { + return nil, err + } + if handshakeSealer != nil { + handshakeHdr, handshakePayload = p.maybeGetCryptoPacket(maxPacketSize-size-protocol.ByteCount(handshakeSealer.Overhead()), protocol.EncryptionHandshake, onlyAck, size == 0, v) + if handshakePayload.length > 0 { + s := p.longHeaderPacketLength(handshakeHdr, handshakePayload, v) + protocol.ByteCount(handshakeSealer.Overhead()) + size += s + } + } + } + + // Add a 0-RTT / 1-RTT packet. + var zeroRTTSealer sealer + var oneRTTSealer handshake.ShortHeaderSealer + var connID protocol.ConnectionID + var kp protocol.KeyPhaseBit + if (onlyAck && size == 0) || (!onlyAck && size < maxPacketSize-protocol.MinCoalescedPacketSize) { + var err error + oneRTTSealer, err = p.cryptoSetup.Get1RTTSealer() + if err != nil && err != handshake.ErrKeysDropped && err != handshake.ErrKeysNotYetAvailable { + return nil, err + } + if err == nil { // 1-RTT + kp = oneRTTSealer.KeyPhase() + connID = p.getDestConnID() + oneRTTPacketNumber, oneRTTPacketNumberLen = p.pnManager.PeekPacketNumber(protocol.Encryption1RTT) + hdrLen := wire.ShortHeaderLen(connID, oneRTTPacketNumberLen) + oneRTTPayload = p.maybeGetShortHeaderPacket(oneRTTSealer, hdrLen, maxPacketSize-size, onlyAck, size == 0, v) + if oneRTTPayload.length > 0 { + size += p.shortHeaderPacketLength(connID, oneRTTPacketNumberLen, oneRTTPayload) + protocol.ByteCount(oneRTTSealer.Overhead()) + } + } else if p.perspective == protocol.PerspectiveClient && !onlyAck { // 0-RTT packets can't contain ACK frames + var err error + zeroRTTSealer, err = p.cryptoSetup.Get0RTTSealer() + if err != nil && err != handshake.ErrKeysDropped && err != handshake.ErrKeysNotYetAvailable { + return nil, err + } + if zeroRTTSealer != nil { + zeroRTTHdr, zeroRTTPayload = p.maybeGetAppDataPacketFor0RTT(zeroRTTSealer, maxPacketSize-size, v) + if zeroRTTPayload.length > 0 { + size += p.longHeaderPacketLength(zeroRTTHdr, zeroRTTPayload, v) + protocol.ByteCount(zeroRTTSealer.Overhead()) + } + } + } + } + + if initialPayload.length == 0 && handshakePayload.length == 0 && zeroRTTPayload.length == 0 && oneRTTPayload.length == 0 { + return nil, nil + } + + buffer := getPacketBuffer() + packet := &coalescedPacket{ + buffer: buffer, + longHdrPackets: make([]*longHeaderPacket, 0, 3), + } + if initialPayload.length > 0 { + padding := p.initialPaddingLen(initialPayload.frames, size, maxPacketSize) + cont, err := p.appendLongHeaderPacket(buffer, initialHdr, initialPayload, padding, protocol.EncryptionInitial, initialSealer, v) + if err != nil { + return nil, err + } + packet.longHdrPackets = append(packet.longHdrPackets, cont) + } + if handshakePayload.length > 0 { + cont, err := p.appendLongHeaderPacket(buffer, handshakeHdr, handshakePayload, 0, protocol.EncryptionHandshake, handshakeSealer, v) + if err != nil { + return nil, err + } + packet.longHdrPackets = append(packet.longHdrPackets, cont) + } + if zeroRTTPayload.length > 0 { + longHdrPacket, err := p.appendLongHeaderPacket(buffer, zeroRTTHdr, zeroRTTPayload, 0, protocol.Encryption0RTT, zeroRTTSealer, v) + if err != nil { + return nil, err + } + packet.longHdrPackets = append(packet.longHdrPackets, longHdrPacket) + } else if oneRTTPayload.length > 0 { + shp, err := p.appendShortHeaderPacket(buffer, connID, oneRTTPacketNumber, oneRTTPacketNumberLen, kp, oneRTTPayload, 0, maxPacketSize, oneRTTSealer, false, v) + if err != nil { + return nil, err + } + packet.shortHdrPacket = &shp + } + return packet, nil +} + +// PackAckOnlyPacket packs a packet containing only an ACK in the application data packet number space. +// It should be called after the handshake is confirmed. +func (p *packetPacker) PackAckOnlyPacket(maxPacketSize protocol.ByteCount, v protocol.Version) (shortHeaderPacket, *packetBuffer, error) { + buf := getPacketBuffer() + packet, err := p.appendPacket(buf, true, maxPacketSize, v) + return packet, buf, err +} + +// AppendPacket packs a packet in the application data packet number space. +// It should be called after the handshake is confirmed. +func (p *packetPacker) AppendPacket(buf *packetBuffer, maxPacketSize protocol.ByteCount, v protocol.Version) (shortHeaderPacket, error) { + return p.appendPacket(buf, false, maxPacketSize, v) +} + +func (p *packetPacker) appendPacket(buf *packetBuffer, onlyAck bool, maxPacketSize protocol.ByteCount, v protocol.Version) (shortHeaderPacket, error) { + sealer, err := p.cryptoSetup.Get1RTTSealer() + if err != nil { + return shortHeaderPacket{}, err + } + pn, pnLen := p.pnManager.PeekPacketNumber(protocol.Encryption1RTT) + connID := p.getDestConnID() + hdrLen := wire.ShortHeaderLen(connID, pnLen) + pl := p.maybeGetShortHeaderPacket(sealer, hdrLen, maxPacketSize, onlyAck, true, v) + if pl.length == 0 { + return shortHeaderPacket{}, errNothingToPack + } + kp := sealer.KeyPhase() + + return p.appendShortHeaderPacket(buf, connID, pn, pnLen, kp, pl, 0, maxPacketSize, sealer, false, v) +} + +func (p *packetPacker) maybeGetCryptoPacket(maxPacketSize protocol.ByteCount, encLevel protocol.EncryptionLevel, onlyAck, ackAllowed bool, v protocol.Version) (*wire.ExtendedHeader, payload) { + if onlyAck { + if ack := p.acks.GetAckFrame(encLevel, true); ack != nil { + return p.getLongHeader(encLevel, v), payload{ + ack: ack, + length: ack.Length(v), + } + } + return nil, payload{} + } + + var s cryptoStream + var handler ackhandler.FrameHandler + var hasRetransmission bool + //nolint:exhaustive // Initial and Handshake are the only two encryption levels here. + switch encLevel { + case protocol.EncryptionInitial: + s = p.initialStream + handler = p.retransmissionQueue.InitialAckHandler() + hasRetransmission = p.retransmissionQueue.HasInitialData() + case protocol.EncryptionHandshake: + s = p.handshakeStream + handler = p.retransmissionQueue.HandshakeAckHandler() + hasRetransmission = p.retransmissionQueue.HasHandshakeData() + } + + hasData := s.HasData() + var ack *wire.AckFrame + if ackAllowed { + ack = p.acks.GetAckFrame(encLevel, !hasRetransmission && !hasData) + } + if !hasData && !hasRetransmission && ack == nil { + // nothing to send + return nil, payload{} + } + + var pl payload + if ack != nil { + pl.ack = ack + pl.length = ack.Length(v) + maxPacketSize -= pl.length + } + hdr := p.getLongHeader(encLevel, v) + maxPacketSize -= hdr.GetLength(v) + if hasRetransmission { + for { + var f ackhandler.Frame + //nolint:exhaustive // 0-RTT packets can't contain any retransmission.s + switch encLevel { + case protocol.EncryptionInitial: + f.Frame = p.retransmissionQueue.GetInitialFrame(maxPacketSize, v) + f.Handler = p.retransmissionQueue.InitialAckHandler() + case protocol.EncryptionHandshake: + f.Frame = p.retransmissionQueue.GetHandshakeFrame(maxPacketSize, v) + f.Handler = p.retransmissionQueue.HandshakeAckHandler() + } + if f.Frame == nil { + break + } + pl.frames = append(pl.frames, f) + frameLen := f.Frame.Length(v) + pl.length += frameLen + maxPacketSize -= frameLen + } + } else if s.HasData() { + cf := s.PopCryptoFrame(maxPacketSize) + pl.frames = []ackhandler.Frame{{Frame: cf, Handler: handler}} + pl.length += cf.Length(v) + } + return hdr, pl +} + +func (p *packetPacker) maybeGetAppDataPacketFor0RTT(sealer sealer, maxPacketSize protocol.ByteCount, v protocol.Version) (*wire.ExtendedHeader, payload) { + if p.perspective != protocol.PerspectiveClient { + return nil, payload{} + } + + hdr := p.getLongHeader(protocol.Encryption0RTT, v) + maxPayloadSize := maxPacketSize - hdr.GetLength(v) - protocol.ByteCount(sealer.Overhead()) + return hdr, p.maybeGetAppDataPacket(maxPayloadSize, false, false, v) +} + +func (p *packetPacker) maybeGetShortHeaderPacket(sealer handshake.ShortHeaderSealer, hdrLen protocol.ByteCount, maxPacketSize protocol.ByteCount, onlyAck, ackAllowed bool, v protocol.Version) payload { + maxPayloadSize := maxPacketSize - hdrLen - protocol.ByteCount(sealer.Overhead()) + return p.maybeGetAppDataPacket(maxPayloadSize, onlyAck, ackAllowed, v) +} + +func (p *packetPacker) maybeGetAppDataPacket(maxPayloadSize protocol.ByteCount, onlyAck, ackAllowed bool, v protocol.Version) payload { + pl := p.composeNextPacket(maxPayloadSize, onlyAck, ackAllowed, v) + + // check if we have anything to send + if len(pl.frames) == 0 && len(pl.streamFrames) == 0 { + if pl.ack == nil { + return payload{} + } + // the packet only contains an ACK + if p.numNonAckElicitingAcks >= protocol.MaxNonAckElicitingAcks { + ping := &wire.PingFrame{} + pl.frames = append(pl.frames, ackhandler.Frame{Frame: ping}) + pl.length += ping.Length(v) + p.numNonAckElicitingAcks = 0 + } else { + p.numNonAckElicitingAcks++ + } + } else { + p.numNonAckElicitingAcks = 0 + } + return pl +} + +func (p *packetPacker) composeNextPacket(maxFrameSize protocol.ByteCount, onlyAck, ackAllowed bool, v protocol.Version) payload { + if onlyAck { + if ack := p.acks.GetAckFrame(protocol.Encryption1RTT, true); ack != nil { + return payload{ack: ack, length: ack.Length(v)} + } + return payload{} + } + + hasData := p.framer.HasData() + hasRetransmission := p.retransmissionQueue.HasAppData() + + var hasAck bool + var pl payload + if ackAllowed { + if ack := p.acks.GetAckFrame(protocol.Encryption1RTT, !hasRetransmission && !hasData); ack != nil { + pl.ack = ack + pl.length += ack.Length(v) + hasAck = true + } + } + + if p.datagramQueue != nil { + if f := p.datagramQueue.Peek(); f != nil { + size := f.Length(v) + if size <= maxFrameSize-pl.length { // DATAGRAM frame fits + pl.frames = append(pl.frames, ackhandler.Frame{Frame: f}) + pl.length += size + p.datagramQueue.Pop() + } else if !hasAck { + // The DATAGRAM frame doesn't fit, and the packet doesn't contain an ACK. + // Discard this frame. There's no point in retrying this in the next packet, + // as it's unlikely that the available packet size will increase. + p.datagramQueue.Pop() + } + // If the DATAGRAM frame was too large and the packet contained an ACK, we'll try to send it out later. + } + } + + if hasAck && !hasData && !hasRetransmission { + return pl + } + + if hasRetransmission { + for { + remainingLen := maxFrameSize - pl.length + if remainingLen < protocol.MinStreamFrameSize { + break + } + f := p.retransmissionQueue.GetAppDataFrame(remainingLen, v) + if f == nil { + break + } + pl.frames = append(pl.frames, ackhandler.Frame{Frame: f, Handler: p.retransmissionQueue.AppDataAckHandler()}) + pl.length += f.Length(v) + } + } + + if hasData { + var lengthAdded protocol.ByteCount + startLen := len(pl.frames) + pl.frames, lengthAdded = p.framer.AppendControlFrames(pl.frames, maxFrameSize-pl.length, v) + pl.length += lengthAdded + // add handlers for the control frames that were added + for i := startLen; i < len(pl.frames); i++ { + switch pl.frames[i].Frame.(type) { + case *wire.PathChallengeFrame, *wire.PathResponseFrame: + // Path probing is currently not supported, therefore we don't need to set the OnAcked callback yet. + // PATH_CHALLENGE and PATH_RESPONSE are never retransmitted. + default: + pl.frames[i].Handler = p.retransmissionQueue.AppDataAckHandler() + } + } + + pl.streamFrames, lengthAdded = p.framer.AppendStreamFrames(pl.streamFrames, maxFrameSize-pl.length, v) + pl.length += lengthAdded + } + return pl +} + +func (p *packetPacker) MaybePackProbePacket(encLevel protocol.EncryptionLevel, maxPacketSize protocol.ByteCount, v protocol.Version) (*coalescedPacket, error) { + if encLevel == protocol.Encryption1RTT { + s, err := p.cryptoSetup.Get1RTTSealer() + if err != nil { + return nil, err + } + kp := s.KeyPhase() + connID := p.getDestConnID() + pn, pnLen := p.pnManager.PeekPacketNumber(protocol.Encryption1RTT) + hdrLen := wire.ShortHeaderLen(connID, pnLen) + pl := p.maybeGetAppDataPacket(maxPacketSize-protocol.ByteCount(s.Overhead())-hdrLen, false, true, v) + if pl.length == 0 { + return nil, nil + } + buffer := getPacketBuffer() + packet := &coalescedPacket{buffer: buffer} + shp, err := p.appendShortHeaderPacket(buffer, connID, pn, pnLen, kp, pl, 0, maxPacketSize, s, false, v) + if err != nil { + return nil, err + } + packet.shortHdrPacket = &shp + return packet, nil + } + + var hdr *wire.ExtendedHeader + var pl payload + var sealer handshake.LongHeaderSealer + //nolint:exhaustive // Probe packets are never sent for 0-RTT. + switch encLevel { + case protocol.EncryptionInitial: + var err error + sealer, err = p.cryptoSetup.GetInitialSealer() + if err != nil { + return nil, err + } + hdr, pl = p.maybeGetCryptoPacket(maxPacketSize-protocol.ByteCount(sealer.Overhead()), protocol.EncryptionInitial, false, true, v) + case protocol.EncryptionHandshake: + var err error + sealer, err = p.cryptoSetup.GetHandshakeSealer() + if err != nil { + return nil, err + } + hdr, pl = p.maybeGetCryptoPacket(maxPacketSize-protocol.ByteCount(sealer.Overhead()), protocol.EncryptionHandshake, false, true, v) + default: + panic("unknown encryption level") + } + + if pl.length == 0 { + return nil, nil + } + buffer := getPacketBuffer() + packet := &coalescedPacket{buffer: buffer} + size := p.longHeaderPacketLength(hdr, pl, v) + protocol.ByteCount(sealer.Overhead()) + var padding protocol.ByteCount + if encLevel == protocol.EncryptionInitial { + padding = p.initialPaddingLen(pl.frames, size, maxPacketSize) + } + + longHdrPacket, err := p.appendLongHeaderPacket(buffer, hdr, pl, padding, encLevel, sealer, v) + if err != nil { + return nil, err + } + packet.longHdrPackets = []*longHeaderPacket{longHdrPacket} + return packet, nil +} + +func (p *packetPacker) PackMTUProbePacket(ping ackhandler.Frame, size protocol.ByteCount, v protocol.Version) (shortHeaderPacket, *packetBuffer, error) { + pl := payload{ + frames: []ackhandler.Frame{ping}, + length: ping.Frame.Length(v), + } + buffer := getPacketBuffer() + s, err := p.cryptoSetup.Get1RTTSealer() + if err != nil { + return shortHeaderPacket{}, nil, err + } + connID := p.getDestConnID() + pn, pnLen := p.pnManager.PeekPacketNumber(protocol.Encryption1RTT) + padding := size - p.shortHeaderPacketLength(connID, pnLen, pl) - protocol.ByteCount(s.Overhead()) + kp := s.KeyPhase() + packet, err := p.appendShortHeaderPacket(buffer, connID, pn, pnLen, kp, pl, padding, size, s, true, v) + return packet, buffer, err +} + +func (p *packetPacker) getLongHeader(encLevel protocol.EncryptionLevel, v protocol.Version) *wire.ExtendedHeader { + pn, pnLen := p.pnManager.PeekPacketNumber(encLevel) + hdr := &wire.ExtendedHeader{ + PacketNumber: pn, + PacketNumberLen: pnLen, + } + hdr.Version = v + hdr.SrcConnectionID = p.srcConnID + hdr.DestConnectionID = p.getDestConnID() + + //nolint:exhaustive // 1-RTT packets are not long header packets. + switch encLevel { + case protocol.EncryptionInitial: + hdr.Type = protocol.PacketTypeInitial + hdr.Token = p.token + case protocol.EncryptionHandshake: + hdr.Type = protocol.PacketTypeHandshake + case protocol.Encryption0RTT: + hdr.Type = protocol.PacketType0RTT + } + return hdr +} + +func (p *packetPacker) appendLongHeaderPacket(buffer *packetBuffer, header *wire.ExtendedHeader, pl payload, padding protocol.ByteCount, encLevel protocol.EncryptionLevel, sealer sealer, v protocol.Version) (*longHeaderPacket, error) { + var paddingLen protocol.ByteCount + pnLen := protocol.ByteCount(header.PacketNumberLen) + if pl.length < 4-pnLen { + paddingLen = 4 - pnLen - pl.length + } + paddingLen += padding + + header.Length = pnLen + protocol.ByteCount(sealer.Overhead()) + pl.length + paddingLen + + startLen := len(buffer.Data) + raw := buffer.Data[startLen:] + raw, err := header.Append(raw, v) + if err != nil { + return nil, err + } + payloadOffset := protocol.ByteCount(len(raw)) + raw, err = p.appendPacketPayload(raw, pl, paddingLen, v) + if err != nil { + return nil, err + } + raw = p.encryptPacket(raw, sealer, header.PacketNumber, payloadOffset, pnLen) + buffer.Data = buffer.Data[:len(buffer.Data)+len(raw)] + + if pn := p.pnManager.PopPacketNumber(encLevel); pn != header.PacketNumber { + return nil, fmt.Errorf("packetPacker BUG: Peeked and Popped packet numbers do not match: expected %d, got %d", pn, header.PacketNumber) + } + return &longHeaderPacket{ + header: header, + ack: pl.ack, + frames: pl.frames, + streamFrames: pl.streamFrames, + length: protocol.ByteCount(len(raw)), + }, nil +} + +func (p *packetPacker) appendShortHeaderPacket( + buffer *packetBuffer, + connID protocol.ConnectionID, + pn protocol.PacketNumber, + pnLen protocol.PacketNumberLen, + kp protocol.KeyPhaseBit, + pl payload, + padding, maxPacketSize protocol.ByteCount, + sealer sealer, + isMTUProbePacket bool, + v protocol.Version, +) (shortHeaderPacket, error) { + var paddingLen protocol.ByteCount + if pl.length < 4-protocol.ByteCount(pnLen) { + paddingLen = 4 - protocol.ByteCount(pnLen) - pl.length + } + paddingLen += padding + + startLen := len(buffer.Data) + raw := buffer.Data[startLen:] + raw, err := wire.AppendShortHeader(raw, connID, pn, pnLen, kp) + if err != nil { + return shortHeaderPacket{}, err + } + payloadOffset := protocol.ByteCount(len(raw)) + + raw, err = p.appendPacketPayload(raw, pl, paddingLen, v) + if err != nil { + return shortHeaderPacket{}, err + } + if !isMTUProbePacket { + if size := protocol.ByteCount(len(raw) + sealer.Overhead()); size > maxPacketSize { + return shortHeaderPacket{}, fmt.Errorf("PacketPacker BUG: packet too large (%d bytes, allowed %d bytes)", size, maxPacketSize) + } + } + raw = p.encryptPacket(raw, sealer, pn, payloadOffset, protocol.ByteCount(pnLen)) + buffer.Data = buffer.Data[:len(buffer.Data)+len(raw)] + + if newPN := p.pnManager.PopPacketNumber(protocol.Encryption1RTT); newPN != pn { + return shortHeaderPacket{}, fmt.Errorf("packetPacker BUG: Peeked and Popped packet numbers do not match: expected %d, got %d", pn, newPN) + } + return shortHeaderPacket{ + PacketNumber: pn, + PacketNumberLen: pnLen, + KeyPhase: kp, + StreamFrames: pl.streamFrames, + Frames: pl.frames, + Ack: pl.ack, + Length: protocol.ByteCount(len(raw)), + DestConnID: connID, + IsPathMTUProbePacket: isMTUProbePacket, + }, nil +} + +// appendPacketPayload serializes the payload of a packet into the raw byte slice. +// It modifies the order of payload.frames. +func (p *packetPacker) appendPacketPayload(raw []byte, pl payload, paddingLen protocol.ByteCount, v protocol.Version) ([]byte, error) { + payloadOffset := len(raw) + if pl.ack != nil { + var err error + raw, err = pl.ack.Append(raw, v) + if err != nil { + return nil, err + } + } + if paddingLen > 0 { + raw = append(raw, make([]byte, paddingLen)...) + } + // Randomize the order of the control frames. + // This makes sure that the receiver doesn't rely on the order in which frames are packed. + if len(pl.frames) > 1 { + p.rand.Shuffle(len(pl.frames), func(i, j int) { pl.frames[i], pl.frames[j] = pl.frames[j], pl.frames[i] }) + } + for _, f := range pl.frames { + var err error + raw, err = f.Frame.Append(raw, v) + if err != nil { + return nil, err + } + } + for _, f := range pl.streamFrames { + var err error + raw, err = f.Frame.Append(raw, v) + if err != nil { + return nil, err + } + } + + if payloadSize := protocol.ByteCount(len(raw)-payloadOffset) - paddingLen; payloadSize != pl.length { + return nil, fmt.Errorf("PacketPacker BUG: payload size inconsistent (expected %d, got %d bytes)", pl.length, payloadSize) + } + return raw, nil +} + +func (p *packetPacker) encryptPacket(raw []byte, sealer sealer, pn protocol.PacketNumber, payloadOffset, pnLen protocol.ByteCount) []byte { + _ = sealer.Seal(raw[payloadOffset:payloadOffset], raw[payloadOffset:], pn, raw[:payloadOffset]) + raw = raw[:len(raw)+sealer.Overhead()] + // apply header protection + pnOffset := payloadOffset - pnLen + sealer.EncryptHeader(raw[pnOffset+4:pnOffset+4+16], &raw[0], raw[pnOffset:payloadOffset]) + return raw +} + +func (p *packetPacker) SetToken(token []byte) { + p.token = token +} diff --git a/backend/vendor/github.com/enetx/uquic/packet_unpacker.go b/backend/vendor/github.com/enetx/uquic/packet_unpacker.go new file mode 100644 index 0000000..4eabac2 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/packet_unpacker.go @@ -0,0 +1,226 @@ +package quic + +import ( + "bytes" + "fmt" + "time" + + "github.com/enetx/uquic/internal/handshake" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/wire" +) + +type headerDecryptor interface { + DecryptHeader(sample []byte, firstByte *byte, pnBytes []byte) +} + +type headerParseError struct { + err error +} + +func (e *headerParseError) Unwrap() error { + return e.err +} + +func (e *headerParseError) Error() string { + return e.err.Error() +} + +type unpackedPacket struct { + hdr *wire.ExtendedHeader + encryptionLevel protocol.EncryptionLevel + data []byte +} + +// The packetUnpacker unpacks QUIC packets. +type packetUnpacker struct { + cs handshake.CryptoSetup + + shortHdrConnIDLen int +} + +var _ unpacker = &packetUnpacker{} + +func newPacketUnpacker(cs handshake.CryptoSetup, shortHdrConnIDLen int) *packetUnpacker { + return &packetUnpacker{ + cs: cs, + shortHdrConnIDLen: shortHdrConnIDLen, + } +} + +// UnpackLongHeader unpacks a Long Header packet. +// If the reserved bits are invalid, the error is wire.ErrInvalidReservedBits. +// If any other error occurred when parsing the header, the error is of type headerParseError. +// If decrypting the payload fails for any reason, the error is the error returned by the AEAD. +func (u *packetUnpacker) UnpackLongHeader(hdr *wire.Header, rcvTime time.Time, data []byte, v protocol.Version) (*unpackedPacket, error) { + var encLevel protocol.EncryptionLevel + var extHdr *wire.ExtendedHeader + var decrypted []byte + //nolint:exhaustive // Retry packets can't be unpacked. + switch hdr.Type { + case protocol.PacketTypeInitial: + encLevel = protocol.EncryptionInitial + opener, err := u.cs.GetInitialOpener() + if err != nil { + return nil, err + } + extHdr, decrypted, err = u.unpackLongHeaderPacket(opener, hdr, data, v) + if err != nil { + return nil, err + } + case protocol.PacketTypeHandshake: + encLevel = protocol.EncryptionHandshake + opener, err := u.cs.GetHandshakeOpener() + if err != nil { + return nil, err + } + extHdr, decrypted, err = u.unpackLongHeaderPacket(opener, hdr, data, v) + if err != nil { + return nil, err + } + case protocol.PacketType0RTT: + encLevel = protocol.Encryption0RTT + opener, err := u.cs.Get0RTTOpener() + if err != nil { + return nil, err + } + extHdr, decrypted, err = u.unpackLongHeaderPacket(opener, hdr, data, v) + if err != nil { + return nil, err + } + default: + return nil, fmt.Errorf("unknown packet type: %s", hdr.Type) + } + + if len(decrypted) == 0 { + return nil, &qerr.TransportError{ + ErrorCode: qerr.ProtocolViolation, + ErrorMessage: "empty packet", + } + } + + return &unpackedPacket{ + hdr: extHdr, + encryptionLevel: encLevel, + data: decrypted, + }, nil +} + +func (u *packetUnpacker) UnpackShortHeader(rcvTime time.Time, data []byte) (protocol.PacketNumber, protocol.PacketNumberLen, protocol.KeyPhaseBit, []byte, error) { + opener, err := u.cs.Get1RTTOpener() + if err != nil { + return 0, 0, 0, nil, err + } + pn, pnLen, kp, decrypted, err := u.unpackShortHeaderPacket(opener, rcvTime, data) + if err != nil { + return 0, 0, 0, nil, err + } + if len(decrypted) == 0 { + return 0, 0, 0, nil, &qerr.TransportError{ + ErrorCode: qerr.ProtocolViolation, + ErrorMessage: "empty packet", + } + } + return pn, pnLen, kp, decrypted, nil +} + +func (u *packetUnpacker) unpackLongHeaderPacket(opener handshake.LongHeaderOpener, hdr *wire.Header, data []byte, v protocol.Version) (*wire.ExtendedHeader, []byte, error) { + extHdr, parseErr := u.unpackLongHeader(opener, hdr, data, v) + // If the reserved bits are set incorrectly, we still need to continue unpacking. + // This avoids a timing side-channel, which otherwise might allow an attacker + // to gain information about the header encryption. + if parseErr != nil && parseErr != wire.ErrInvalidReservedBits { + return nil, nil, parseErr + } + extHdrLen := extHdr.ParsedLen() + extHdr.PacketNumber = opener.DecodePacketNumber(extHdr.PacketNumber, extHdr.PacketNumberLen) + decrypted, err := opener.Open(data[extHdrLen:extHdrLen], data[extHdrLen:], extHdr.PacketNumber, data[:extHdrLen]) + if err != nil { + return nil, nil, err + } + if parseErr != nil { + return nil, nil, parseErr + } + return extHdr, decrypted, nil +} + +func (u *packetUnpacker) unpackShortHeaderPacket(opener handshake.ShortHeaderOpener, rcvTime time.Time, data []byte) (protocol.PacketNumber, protocol.PacketNumberLen, protocol.KeyPhaseBit, []byte, error) { + l, pn, pnLen, kp, parseErr := u.unpackShortHeader(opener, data) + // If the reserved bits are set incorrectly, we still need to continue unpacking. + // This avoids a timing side-channel, which otherwise might allow an attacker + // to gain information about the header encryption. + if parseErr != nil && parseErr != wire.ErrInvalidReservedBits { + return 0, 0, 0, nil, &headerParseError{parseErr} + } + pn = opener.DecodePacketNumber(pn, pnLen) + decrypted, err := opener.Open(data[l:l], data[l:], rcvTime, pn, kp, data[:l]) + if err != nil { + return 0, 0, 0, nil, err + } + return pn, pnLen, kp, decrypted, parseErr +} + +func (u *packetUnpacker) unpackShortHeader(hd headerDecryptor, data []byte) (int, protocol.PacketNumber, protocol.PacketNumberLen, protocol.KeyPhaseBit, error) { + hdrLen := 1 /* first header byte */ + u.shortHdrConnIDLen + if len(data) < hdrLen+4+16 { + return 0, 0, 0, 0, fmt.Errorf("packet too small, expected at least 20 bytes after the header, got %d", len(data)-hdrLen) + } + origPNBytes := make([]byte, 4) + copy(origPNBytes, data[hdrLen:hdrLen+4]) + // 2. decrypt the header, assuming a 4 byte packet number + hd.DecryptHeader( + data[hdrLen+4:hdrLen+4+16], + &data[0], + data[hdrLen:hdrLen+4], + ) + // 3. parse the header (and learn the actual length of the packet number) + l, pn, pnLen, kp, parseErr := wire.ParseShortHeader(data, u.shortHdrConnIDLen) + if parseErr != nil && parseErr != wire.ErrInvalidReservedBits { + return l, pn, pnLen, kp, parseErr + } + // 4. if the packet number is shorter than 4 bytes, replace the remaining bytes with the copy we saved earlier + if pnLen != protocol.PacketNumberLen4 { + copy(data[hdrLen+int(pnLen):hdrLen+4], origPNBytes[int(pnLen):]) + } + return l, pn, pnLen, kp, parseErr +} + +// The error is either nil, a wire.ErrInvalidReservedBits or of type headerParseError. +func (u *packetUnpacker) unpackLongHeader(hd headerDecryptor, hdr *wire.Header, data []byte, v protocol.Version) (*wire.ExtendedHeader, error) { + extHdr, err := unpackLongHeader(hd, hdr, data, v) + if err != nil && err != wire.ErrInvalidReservedBits { + return nil, &headerParseError{err: err} + } + return extHdr, err +} + +func unpackLongHeader(hd headerDecryptor, hdr *wire.Header, data []byte, v protocol.Version) (*wire.ExtendedHeader, error) { + r := bytes.NewReader(data) + + hdrLen := hdr.ParsedLen() + if protocol.ByteCount(len(data)) < hdrLen+4+16 { + //nolint:stylecheck + return nil, fmt.Errorf("Packet too small. Expected at least 20 bytes after the header, got %d", protocol.ByteCount(len(data))-hdrLen) + } + // The packet number can be up to 4 bytes long, but we won't know the length until we decrypt it. + // 1. save a copy of the 4 bytes + origPNBytes := make([]byte, 4) + copy(origPNBytes, data[hdrLen:hdrLen+4]) + // 2. decrypt the header, assuming a 4 byte packet number + hd.DecryptHeader( + data[hdrLen+4:hdrLen+4+16], + &data[0], + data[hdrLen:hdrLen+4], + ) + // 3. parse the header (and learn the actual length of the packet number) + extHdr, parseErr := hdr.ParseExtended(r, v) + if parseErr != nil && parseErr != wire.ErrInvalidReservedBits { + return nil, parseErr + } + // 4. if the packet number is shorter than 4 bytes, replace the remaining bytes with the copy we saved earlier + if extHdr.PacketNumberLen != protocol.PacketNumberLen4 { + copy(data[extHdr.ParsedLen():hdrLen+4], origPNBytes[int(extHdr.PacketNumberLen):]) + } + return extHdr, parseErr +} diff --git a/backend/vendor/github.com/enetx/uquic/quicvarint/io.go b/backend/vendor/github.com/enetx/uquic/quicvarint/io.go new file mode 100644 index 0000000..9368d1c --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/quicvarint/io.go @@ -0,0 +1,68 @@ +package quicvarint + +import ( + "bytes" + "io" +) + +// Reader implements both the io.ByteReader and io.Reader interfaces. +type Reader interface { + io.ByteReader + io.Reader +} + +var _ Reader = &bytes.Reader{} + +type byteReader struct { + io.Reader +} + +var _ Reader = &byteReader{} + +// NewReader returns a Reader for r. +// If r already implements both io.ByteReader and io.Reader, NewReader returns r. +// Otherwise, r is wrapped to add the missing interfaces. +func NewReader(r io.Reader) Reader { + if r, ok := r.(Reader); ok { + return r + } + return &byteReader{r} +} + +func (r *byteReader) ReadByte() (byte, error) { + var b [1]byte + n, err := r.Reader.Read(b[:]) + if n == 1 && err == io.EOF { + err = nil + } + return b[0], err +} + +// Writer implements both the io.ByteWriter and io.Writer interfaces. +type Writer interface { + io.ByteWriter + io.Writer +} + +var _ Writer = &bytes.Buffer{} + +type byteWriter struct { + io.Writer +} + +var _ Writer = &byteWriter{} + +// NewWriter returns a Writer for w. +// If r already implements both io.ByteWriter and io.Writer, NewWriter returns w. +// Otherwise, w is wrapped to add the missing interfaces. +func NewWriter(w io.Writer) Writer { + if w, ok := w.(Writer); ok { + return w + } + return &byteWriter{w} +} + +func (w *byteWriter) WriteByte(c byte) error { + _, err := w.Writer.Write([]byte{c}) + return err +} diff --git a/backend/vendor/github.com/enetx/uquic/quicvarint/varint.go b/backend/vendor/github.com/enetx/uquic/quicvarint/varint.go new file mode 100644 index 0000000..ebbc207 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/quicvarint/varint.go @@ -0,0 +1,141 @@ +package quicvarint + +import ( + "fmt" + "io" + + "github.com/enetx/uquic/internal/protocol" +) + +// taken from the QUIC draft +const ( + // Min is the minimum value allowed for a QUIC varint. + Min = 0 + + // Max is the maximum allowed value for a QUIC varint (2^62-1). + Max = maxVarInt8 + + maxVarInt1 = 63 + maxVarInt2 = 16383 + maxVarInt4 = 1073741823 + maxVarInt8 = 4611686018427387903 +) + +// Read reads a number in the QUIC varint format from r. +func Read(r io.ByteReader) (uint64, error) { + firstByte, err := r.ReadByte() + if err != nil { + return 0, err + } + // the first two bits of the first byte encode the length + len := 1 << ((firstByte & 0xc0) >> 6) + b1 := firstByte & (0xff - 0xc0) + if len == 1 { + return uint64(b1), nil + } + b2, err := r.ReadByte() + if err != nil { + return 0, err + } + if len == 2 { + return uint64(b2) + uint64(b1)<<8, nil + } + b3, err := r.ReadByte() + if err != nil { + return 0, err + } + b4, err := r.ReadByte() + if err != nil { + return 0, err + } + if len == 4 { + return uint64(b4) + uint64(b3)<<8 + uint64(b2)<<16 + uint64(b1)<<24, nil + } + b5, err := r.ReadByte() + if err != nil { + return 0, err + } + b6, err := r.ReadByte() + if err != nil { + return 0, err + } + b7, err := r.ReadByte() + if err != nil { + return 0, err + } + b8, err := r.ReadByte() + if err != nil { + return 0, err + } + return uint64(b8) + uint64(b7)<<8 + uint64(b6)<<16 + uint64(b5)<<24 + uint64(b4)<<32 + uint64(b3)<<40 + uint64(b2)<<48 + uint64(b1)<<56, nil +} + +// Append appends i in the QUIC varint format. +func Append(b []byte, i uint64) []byte { + if i <= maxVarInt1 { + return append(b, uint8(i)) + } + if i <= maxVarInt2 { + return append(b, []byte{uint8(i>>8) | 0x40, uint8(i)}...) + } + if i <= maxVarInt4 { + return append(b, []byte{uint8(i>>24) | 0x80, uint8(i >> 16), uint8(i >> 8), uint8(i)}...) + } + if i <= maxVarInt8 { + return append(b, []byte{ + uint8(i>>56) | 0xc0, uint8(i >> 48), uint8(i >> 40), uint8(i >> 32), + uint8(i >> 24), uint8(i >> 16), uint8(i >> 8), uint8(i), + }...) + } + panic(fmt.Sprintf("%#x doesn't fit into 62 bits", i)) +} + +// AppendWithLen append i in the QUIC varint format with the desired length. +func AppendWithLen(b []byte, i uint64, length protocol.ByteCount) []byte { + if length != 1 && length != 2 && length != 4 && length != 8 { + panic("invalid varint length") + } + l := Len(i) + if l == length { + return Append(b, i) + } + if l > length { + panic(fmt.Sprintf("cannot encode %d in %d bytes", i, length)) + } + if length == 2 { + b = append(b, 0b01000000) + } else if length == 4 { + b = append(b, 0b10000000) + } else if length == 8 { + b = append(b, 0b11000000) + } + for j := protocol.ByteCount(1); j < length-l; j++ { + b = append(b, 0) + } + for j := protocol.ByteCount(0); j < l; j++ { + b = append(b, uint8(i>>(8*(l-1-j)))) + } + return b +} + +// Len determines the number of bytes that will be needed to write the number i. +func Len(i uint64) protocol.ByteCount { + if i <= maxVarInt1 { + return 1 + } + if i <= maxVarInt2 { + return 2 + } + if i <= maxVarInt4 { + return 4 + } + if i <= maxVarInt8 { + return 8 + } + // Don't use a fmt.Sprintf here to format the error message. + // The function would then exceed the inlining budget. + panic(struct { + message string + num uint64 + }{"value doesn't fit into 62 bits: ", i}) +} diff --git a/backend/vendor/github.com/enetx/uquic/receive_stream.go b/backend/vendor/github.com/enetx/uquic/receive_stream.go new file mode 100644 index 0000000..123d803 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/receive_stream.go @@ -0,0 +1,323 @@ +package quic + +import ( + "fmt" + "io" + "sync" + "time" + + "github.com/enetx/uquic/internal/flowcontrol" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/internal/wire" +) + +type receiveStreamI interface { + ReceiveStream + + handleStreamFrame(*wire.StreamFrame) error + handleResetStreamFrame(*wire.ResetStreamFrame) error + closeForShutdown(error) + getWindowUpdate() protocol.ByteCount +} + +type receiveStream struct { + mutex sync.Mutex + + streamID protocol.StreamID + + sender streamSender + + frameQueue *frameSorter + finalOffset protocol.ByteCount + + currentFrame []byte + currentFrameDone func() + readPosInFrame int + currentFrameIsLast bool // is the currentFrame the last frame on this stream + + finRead bool // set once we read a frame with a Fin + closeForShutdownErr error + cancelReadErr error + resetRemotelyErr *StreamError + + readChan chan struct{} + readOnce chan struct{} // cap: 1, to protect against concurrent use of Read + deadline time.Time + + flowController flowcontrol.StreamFlowController +} + +var ( + _ ReceiveStream = &receiveStream{} + _ receiveStreamI = &receiveStream{} +) + +func newReceiveStream( + streamID protocol.StreamID, + sender streamSender, + flowController flowcontrol.StreamFlowController, +) *receiveStream { + return &receiveStream{ + streamID: streamID, + sender: sender, + flowController: flowController, + frameQueue: newFrameSorter(), + readChan: make(chan struct{}, 1), + readOnce: make(chan struct{}, 1), + finalOffset: protocol.MaxByteCount, + } +} + +func (s *receiveStream) StreamID() protocol.StreamID { + return s.streamID +} + +// Read implements io.Reader. It is not thread safe! +func (s *receiveStream) Read(p []byte) (int, error) { + // Concurrent use of Read is not permitted (and doesn't make any sense), + // but sometimes people do it anyway. + // Make sure that we only execute one call at any given time to avoid hard to debug failures. + s.readOnce <- struct{}{} + defer func() { <-s.readOnce }() + + s.mutex.Lock() + completed, n, err := s.readImpl(p) + s.mutex.Unlock() + + if completed { + s.sender.onStreamCompleted(s.streamID) + } + return n, err +} + +func (s *receiveStream) readImpl(p []byte) (bool /*stream completed */, int, error) { + if s.finRead { + return false, 0, io.EOF + } + if s.cancelReadErr != nil { + return false, 0, s.cancelReadErr + } + if s.resetRemotelyErr != nil { + return false, 0, s.resetRemotelyErr + } + if s.closeForShutdownErr != nil { + return false, 0, s.closeForShutdownErr + } + + var bytesRead int + var deadlineTimer *utils.Timer + for bytesRead < len(p) { + if s.currentFrame == nil || s.readPosInFrame >= len(s.currentFrame) { + s.dequeueNextFrame() + } + if s.currentFrame == nil && bytesRead > 0 { + return false, bytesRead, s.closeForShutdownErr + } + + for { + // Stop waiting on errors + if s.closeForShutdownErr != nil { + return false, bytesRead, s.closeForShutdownErr + } + if s.cancelReadErr != nil { + return false, bytesRead, s.cancelReadErr + } + if s.resetRemotelyErr != nil { + return false, bytesRead, s.resetRemotelyErr + } + + deadline := s.deadline + if !deadline.IsZero() { + if !time.Now().Before(deadline) { + return false, bytesRead, errDeadline + } + if deadlineTimer == nil { + deadlineTimer = utils.NewTimer() + defer deadlineTimer.Stop() + } + deadlineTimer.Reset(deadline) + } + + if s.currentFrame != nil || s.currentFrameIsLast { + break + } + + s.mutex.Unlock() + if deadline.IsZero() { + <-s.readChan + } else { + select { + case <-s.readChan: + case <-deadlineTimer.Chan(): + deadlineTimer.SetRead() + } + } + s.mutex.Lock() + if s.currentFrame == nil { + s.dequeueNextFrame() + } + } + + if bytesRead > len(p) { + return false, bytesRead, fmt.Errorf("BUG: bytesRead (%d) > len(p) (%d) in stream.Read", bytesRead, len(p)) + } + if s.readPosInFrame > len(s.currentFrame) { + return false, bytesRead, fmt.Errorf("BUG: readPosInFrame (%d) > frame.DataLen (%d) in stream.Read", s.readPosInFrame, len(s.currentFrame)) + } + + m := copy(p[bytesRead:], s.currentFrame[s.readPosInFrame:]) + s.readPosInFrame += m + bytesRead += m + + // when a RESET_STREAM was received, the flow controller was already + // informed about the final byteOffset for this stream + if s.resetRemotelyErr == nil { + s.flowController.AddBytesRead(protocol.ByteCount(m)) + } + + if s.readPosInFrame >= len(s.currentFrame) && s.currentFrameIsLast { + s.finRead = true + s.currentFrame = nil + if s.currentFrameDone != nil { + s.currentFrameDone() + } + return true, bytesRead, io.EOF + } + } + return false, bytesRead, nil +} + +func (s *receiveStream) dequeueNextFrame() { + var offset protocol.ByteCount + // We're done with the last frame. Release the buffer. + if s.currentFrameDone != nil { + s.currentFrameDone() + } + offset, s.currentFrame, s.currentFrameDone = s.frameQueue.Pop() + s.currentFrameIsLast = offset+protocol.ByteCount(len(s.currentFrame)) >= s.finalOffset + s.readPosInFrame = 0 +} + +func (s *receiveStream) CancelRead(errorCode StreamErrorCode) { + s.mutex.Lock() + completed := s.cancelReadImpl(errorCode) + s.mutex.Unlock() + + if completed { + s.flowController.Abandon() + s.sender.onStreamCompleted(s.streamID) + } +} + +func (s *receiveStream) cancelReadImpl(errorCode qerr.StreamErrorCode) bool /* completed */ { + if s.finRead || s.cancelReadErr != nil || s.resetRemotelyErr != nil { + return false + } + s.cancelReadErr = &StreamError{StreamID: s.streamID, ErrorCode: errorCode, Remote: false} + s.signalRead() + s.sender.queueControlFrame(&wire.StopSendingFrame{ + StreamID: s.streamID, + ErrorCode: errorCode, + }) + // We're done with this stream if the final offset was already received. + return s.finalOffset != protocol.MaxByteCount +} + +func (s *receiveStream) handleStreamFrame(frame *wire.StreamFrame) error { + s.mutex.Lock() + completed, err := s.handleStreamFrameImpl(frame) + s.mutex.Unlock() + + if completed { + s.flowController.Abandon() + s.sender.onStreamCompleted(s.streamID) + } + return err +} + +func (s *receiveStream) handleStreamFrameImpl(frame *wire.StreamFrame) (bool /* completed */, error) { + maxOffset := frame.Offset + frame.DataLen() + if err := s.flowController.UpdateHighestReceived(maxOffset, frame.Fin); err != nil { + return false, err + } + var newlyRcvdFinalOffset bool + if frame.Fin { + newlyRcvdFinalOffset = s.finalOffset == protocol.MaxByteCount + s.finalOffset = maxOffset + } + if s.cancelReadErr != nil { + return newlyRcvdFinalOffset, nil + } + if err := s.frameQueue.Push(frame.Data, frame.Offset, frame.PutBack); err != nil { + return false, err + } + s.signalRead() + return false, nil +} + +func (s *receiveStream) handleResetStreamFrame(frame *wire.ResetStreamFrame) error { + s.mutex.Lock() + completed, err := s.handleResetStreamFrameImpl(frame) + s.mutex.Unlock() + + if completed { + s.flowController.Abandon() + s.sender.onStreamCompleted(s.streamID) + } + return err +} + +func (s *receiveStream) handleResetStreamFrameImpl(frame *wire.ResetStreamFrame) (bool /*completed */, error) { + if s.closeForShutdownErr != nil { + return false, nil + } + if err := s.flowController.UpdateHighestReceived(frame.FinalSize, true); err != nil { + return false, err + } + newlyRcvdFinalOffset := s.finalOffset == protocol.MaxByteCount + s.finalOffset = frame.FinalSize + + // ignore duplicate RESET_STREAM frames for this stream (after checking their final offset) + if s.resetRemotelyErr != nil { + return false, nil + } + s.resetRemotelyErr = &StreamError{ + StreamID: s.streamID, + ErrorCode: frame.ErrorCode, + Remote: true, + } + s.signalRead() + return newlyRcvdFinalOffset, nil +} + +func (s *receiveStream) SetReadDeadline(t time.Time) error { + s.mutex.Lock() + s.deadline = t + s.mutex.Unlock() + s.signalRead() + return nil +} + +// CloseForShutdown closes a stream abruptly. +// It makes Read unblock (and return the error) immediately. +// The peer will NOT be informed about this: the stream is closed without sending a FIN or RESET. +func (s *receiveStream) closeForShutdown(err error) { + s.mutex.Lock() + s.closeForShutdownErr = err + s.mutex.Unlock() + s.signalRead() +} + +func (s *receiveStream) getWindowUpdate() protocol.ByteCount { + return s.flowController.GetWindowUpdate() +} + +// signalRead performs a non-blocking send on the readChan +func (s *receiveStream) signalRead() { + select { + case s.readChan <- struct{}{}: + default: + } +} diff --git a/backend/vendor/github.com/enetx/uquic/retransmission_queue.go b/backend/vendor/github.com/enetx/uquic/retransmission_queue.go new file mode 100644 index 0000000..a846a57 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/retransmission_queue.go @@ -0,0 +1,180 @@ +package quic + +import ( + "fmt" + + "github.com/enetx/uquic/internal/ackhandler" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/wire" +) + +type retransmissionQueue struct { + initial []wire.Frame + initialCryptoData []*wire.CryptoFrame + + handshake []wire.Frame + handshakeCryptoData []*wire.CryptoFrame + + appData []wire.Frame +} + +func newRetransmissionQueue() *retransmissionQueue { + return &retransmissionQueue{} +} + +// AddPing queues a ping. +// It is used when a probe packet needs to be sent +func (q *retransmissionQueue) AddPing(encLevel protocol.EncryptionLevel) { + //nolint:exhaustive // Cannot send probe packets for 0-RTT. + switch encLevel { + case protocol.EncryptionInitial: + q.addInitial(&wire.PingFrame{}) + case protocol.EncryptionHandshake: + q.addHandshake(&wire.PingFrame{}) + case protocol.Encryption1RTT: + q.addAppData(&wire.PingFrame{}) + default: + panic("unexpected encryption level") + } +} + +func (q *retransmissionQueue) addInitial(f wire.Frame) { + if cf, ok := f.(*wire.CryptoFrame); ok { + q.initialCryptoData = append(q.initialCryptoData, cf) + return + } + q.initial = append(q.initial, f) +} + +func (q *retransmissionQueue) addHandshake(f wire.Frame) { + if cf, ok := f.(*wire.CryptoFrame); ok { + q.handshakeCryptoData = append(q.handshakeCryptoData, cf) + return + } + q.handshake = append(q.handshake, f) +} + +func (q *retransmissionQueue) HasInitialData() bool { + return len(q.initialCryptoData) > 0 || len(q.initial) > 0 +} + +func (q *retransmissionQueue) HasHandshakeData() bool { + return len(q.handshakeCryptoData) > 0 || len(q.handshake) > 0 +} + +func (q *retransmissionQueue) HasAppData() bool { + return len(q.appData) > 0 +} + +func (q *retransmissionQueue) addAppData(f wire.Frame) { + if _, ok := f.(*wire.StreamFrame); ok { + panic("STREAM frames are handled with their respective streams.") + } + q.appData = append(q.appData, f) +} + +func (q *retransmissionQueue) GetInitialFrame(maxLen protocol.ByteCount, v protocol.Version) wire.Frame { + if len(q.initialCryptoData) > 0 { + f := q.initialCryptoData[0] + newFrame, needsSplit := f.MaybeSplitOffFrame(maxLen, v) + if newFrame == nil && !needsSplit { // the whole frame fits + q.initialCryptoData = q.initialCryptoData[1:] + return f + } + if newFrame != nil { // frame was split. Leave the original frame in the queue. + return newFrame + } + } + if len(q.initial) == 0 { + return nil + } + f := q.initial[0] + if f.Length(v) > maxLen { + return nil + } + q.initial = q.initial[1:] + return f +} + +func (q *retransmissionQueue) GetHandshakeFrame(maxLen protocol.ByteCount, v protocol.Version) wire.Frame { + if len(q.handshakeCryptoData) > 0 { + f := q.handshakeCryptoData[0] + newFrame, needsSplit := f.MaybeSplitOffFrame(maxLen, v) + if newFrame == nil && !needsSplit { // the whole frame fits + q.handshakeCryptoData = q.handshakeCryptoData[1:] + return f + } + if newFrame != nil { // frame was split. Leave the original frame in the queue. + return newFrame + } + } + if len(q.handshake) == 0 { + return nil + } + f := q.handshake[0] + if f.Length(v) > maxLen { + return nil + } + q.handshake = q.handshake[1:] + return f +} + +func (q *retransmissionQueue) GetAppDataFrame(maxLen protocol.ByteCount, v protocol.Version) wire.Frame { + if len(q.appData) == 0 { + return nil + } + f := q.appData[0] + if f.Length(v) > maxLen { + return nil + } + q.appData = q.appData[1:] + return f +} + +func (q *retransmissionQueue) DropPackets(encLevel protocol.EncryptionLevel) { + //nolint:exhaustive // Can only drop Initial and Handshake packet number space. + switch encLevel { + case protocol.EncryptionInitial: + q.initial = nil + q.initialCryptoData = nil + case protocol.EncryptionHandshake: + q.handshake = nil + q.handshakeCryptoData = nil + default: + panic(fmt.Sprintf("unexpected encryption level: %s", encLevel)) + } +} + +func (q *retransmissionQueue) InitialAckHandler() ackhandler.FrameHandler { + return (*retransmissionQueueInitialAckHandler)(q) +} + +func (q *retransmissionQueue) HandshakeAckHandler() ackhandler.FrameHandler { + return (*retransmissionQueueHandshakeAckHandler)(q) +} + +func (q *retransmissionQueue) AppDataAckHandler() ackhandler.FrameHandler { + return (*retransmissionQueueAppDataAckHandler)(q) +} + +type retransmissionQueueInitialAckHandler retransmissionQueue + +func (q *retransmissionQueueInitialAckHandler) OnAcked(wire.Frame) {} +func (q *retransmissionQueueInitialAckHandler) OnLost(f wire.Frame) { + (*retransmissionQueue)(q).addInitial(f) +} + +type retransmissionQueueHandshakeAckHandler retransmissionQueue + +func (q *retransmissionQueueHandshakeAckHandler) OnAcked(wire.Frame) {} +func (q *retransmissionQueueHandshakeAckHandler) OnLost(f wire.Frame) { + (*retransmissionQueue)(q).addHandshake(f) +} + +type retransmissionQueueAppDataAckHandler retransmissionQueue + +func (q *retransmissionQueueAppDataAckHandler) OnAcked(wire.Frame) {} +func (q *retransmissionQueueAppDataAckHandler) OnLost(f wire.Frame) { + (*retransmissionQueue)(q).addAppData(f) +} diff --git a/backend/vendor/github.com/enetx/uquic/send_conn.go b/backend/vendor/github.com/enetx/uquic/send_conn.go new file mode 100644 index 0000000..03f6a83 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/send_conn.go @@ -0,0 +1,103 @@ +package quic + +import ( + "net" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" +) + +// A sendConn allows sending using a simple Write() on a non-connected packet conn. +type sendConn interface { + Write(b []byte, gsoSize uint16, ecn protocol.ECN) error + Close() error + LocalAddr() net.Addr + RemoteAddr() net.Addr + + capabilities() connCapabilities +} + +type sconn struct { + rawConn + + localAddr net.Addr + remoteAddr net.Addr + + logger utils.Logger + + packetInfoOOB []byte + // If GSO enabled, and we receive a GSO error for this remote address, GSO is disabled. + gotGSOError bool + // Used to catch the error sometimes returned by the first sendmsg call on Linux, + // see https://github.com/golang/go/issues/63322. + wroteFirstPacket bool +} + +var _ sendConn = &sconn{} + +func newSendConn(c rawConn, remote net.Addr, info packetInfo, logger utils.Logger) *sconn { + localAddr := c.LocalAddr() + if info.addr.IsValid() { + if udpAddr, ok := localAddr.(*net.UDPAddr); ok { + addrCopy := *udpAddr + addrCopy.IP = info.addr.AsSlice() + localAddr = &addrCopy + } + } + + oob := info.OOB() + // increase oob slice capacity, so we can add the UDP_SEGMENT and ECN control messages without allocating + l := len(oob) + oob = append(oob, make([]byte, 64)...)[:l] + return &sconn{ + rawConn: c, + localAddr: localAddr, + remoteAddr: remote, + packetInfoOOB: oob, + logger: logger, + } +} + +func (c *sconn) Write(p []byte, gsoSize uint16, ecn protocol.ECN) error { + err := c.writePacket(p, c.remoteAddr, c.packetInfoOOB, gsoSize, ecn) + if err != nil && isGSOError(err) { + // disable GSO for future calls + c.gotGSOError = true + if c.logger.Debug() { + c.logger.Debugf("GSO failed when sending to %s", c.remoteAddr) + } + // send out the packets one by one + for len(p) > 0 { + l := len(p) + if l > int(gsoSize) { + l = int(gsoSize) + } + if err := c.writePacket(p[:l], c.remoteAddr, c.packetInfoOOB, 0, ecn); err != nil { + return err + } + p = p[l:] + } + return nil + } + return err +} + +func (c *sconn) writePacket(p []byte, addr net.Addr, oob []byte, gsoSize uint16, ecn protocol.ECN) error { + _, err := c.WritePacket(p, addr, oob, gsoSize, ecn) + if err != nil && !c.wroteFirstPacket && isPermissionError(err) { + _, err = c.WritePacket(p, addr, oob, gsoSize, ecn) + } + c.wroteFirstPacket = true + return err +} + +func (c *sconn) capabilities() connCapabilities { + capabilities := c.rawConn.capabilities() + if capabilities.GSO { + capabilities.GSO = !c.gotGSOError + } + return capabilities +} + +func (c *sconn) RemoteAddr() net.Addr { return c.remoteAddr } +func (c *sconn) LocalAddr() net.Addr { return c.localAddr } diff --git a/backend/vendor/github.com/enetx/uquic/send_queue.go b/backend/vendor/github.com/enetx/uquic/send_queue.go new file mode 100644 index 0000000..e6e2f0b --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/send_queue.go @@ -0,0 +1,103 @@ +package quic + +import "github.com/enetx/uquic/internal/protocol" + +type sender interface { + Send(p *packetBuffer, gsoSize uint16, ecn protocol.ECN) + Run() error + WouldBlock() bool + Available() <-chan struct{} + Close() +} + +type queueEntry struct { + buf *packetBuffer + gsoSize uint16 + ecn protocol.ECN +} + +type sendQueue struct { + queue chan queueEntry + closeCalled chan struct{} // runStopped when Close() is called + runStopped chan struct{} // runStopped when the run loop returns + available chan struct{} + conn sendConn +} + +var _ sender = &sendQueue{} + +const sendQueueCapacity = 8 + +func newSendQueue(conn sendConn) sender { + return &sendQueue{ + conn: conn, + runStopped: make(chan struct{}), + closeCalled: make(chan struct{}), + available: make(chan struct{}, 1), + queue: make(chan queueEntry, sendQueueCapacity), + } +} + +// Send sends out a packet. It's guaranteed to not block. +// Callers need to make sure that there's actually space in the send queue by calling WouldBlock. +// Otherwise Send will panic. +func (h *sendQueue) Send(p *packetBuffer, gsoSize uint16, ecn protocol.ECN) { + select { + case h.queue <- queueEntry{buf: p, gsoSize: gsoSize, ecn: ecn}: + // clear available channel if we've reached capacity + if len(h.queue) == sendQueueCapacity { + select { + case <-h.available: + default: + } + } + case <-h.runStopped: + default: + panic("sendQueue.Send would have blocked") + } +} + +func (h *sendQueue) WouldBlock() bool { + return len(h.queue) == sendQueueCapacity +} + +func (h *sendQueue) Available() <-chan struct{} { + return h.available +} + +func (h *sendQueue) Run() error { + defer close(h.runStopped) + var shouldClose bool + for { + if shouldClose && len(h.queue) == 0 { + return nil + } + select { + case <-h.closeCalled: + h.closeCalled = nil // prevent this case from being selected again + // make sure that all queued packets are actually sent out + shouldClose = true + case e := <-h.queue: + if err := h.conn.Write(e.buf.Data, e.gsoSize, e.ecn); err != nil { + // This additional check enables: + // 1. Checking for "datagram too large" message from the kernel, as such, + // 2. Path MTU discovery,and + // 3. Eventual detection of loss PingFrame. + if !isSendMsgSizeErr(err) { + return err + } + } + e.buf.Release() + select { + case h.available <- struct{}{}: + default: + } + } + } +} + +func (h *sendQueue) Close() { + close(h.closeCalled) + // wait until the run loop returned + <-h.runStopped +} diff --git a/backend/vendor/github.com/enetx/uquic/send_stream.go b/backend/vendor/github.com/enetx/uquic/send_stream.go new file mode 100644 index 0000000..d892037 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/send_stream.go @@ -0,0 +1,494 @@ +package quic + +import ( + "context" + "fmt" + "sync" + "time" + + "github.com/enetx/uquic/internal/ackhandler" + "github.com/enetx/uquic/internal/flowcontrol" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/internal/wire" +) + +type sendStreamI interface { + SendStream + handleStopSendingFrame(*wire.StopSendingFrame) + hasData() bool + popStreamFrame(maxBytes protocol.ByteCount, v protocol.Version) (frame ackhandler.StreamFrame, ok, hasMore bool) + closeForShutdown(error) + updateSendWindow(protocol.ByteCount) +} + +type sendStream struct { + mutex sync.Mutex + + numOutstandingFrames int64 + retransmissionQueue []*wire.StreamFrame + + ctx context.Context + ctxCancel context.CancelCauseFunc + + streamID protocol.StreamID + sender streamSender + + writeOffset protocol.ByteCount + + cancelWriteErr error + closeForShutdownErr error + + finishedWriting bool // set once Close() is called + finSent bool // set when a STREAM_FRAME with FIN bit has been sent + completed bool // set when this stream has been reported to the streamSender as completed + + dataForWriting []byte // during a Write() call, this slice is the part of p that still needs to be sent out + nextFrame *wire.StreamFrame + + writeChan chan struct{} + writeOnce chan struct{} + deadline time.Time + + flowController flowcontrol.StreamFlowController +} + +var ( + _ SendStream = &sendStream{} + _ sendStreamI = &sendStream{} +) + +func newSendStream( + streamID protocol.StreamID, + sender streamSender, + flowController flowcontrol.StreamFlowController, +) *sendStream { + s := &sendStream{ + streamID: streamID, + sender: sender, + flowController: flowController, + writeChan: make(chan struct{}, 1), + writeOnce: make(chan struct{}, 1), // cap: 1, to protect against concurrent use of Write + } + s.ctx, s.ctxCancel = context.WithCancelCause(context.Background()) + return s +} + +func (s *sendStream) StreamID() protocol.StreamID { + return s.streamID // same for receiveStream and sendStream +} + +func (s *sendStream) Write(p []byte) (int, error) { + // Concurrent use of Write is not permitted (and doesn't make any sense), + // but sometimes people do it anyway. + // Make sure that we only execute one call at any given time to avoid hard to debug failures. + s.writeOnce <- struct{}{} + defer func() { <-s.writeOnce }() + + s.mutex.Lock() + defer s.mutex.Unlock() + + if s.finishedWriting { + return 0, fmt.Errorf("write on closed stream %d", s.streamID) + } + if s.cancelWriteErr != nil { + return 0, s.cancelWriteErr + } + if s.closeForShutdownErr != nil { + return 0, s.closeForShutdownErr + } + if !s.deadline.IsZero() && !time.Now().Before(s.deadline) { + return 0, errDeadline + } + if len(p) == 0 { + return 0, nil + } + + s.dataForWriting = p + + var ( + deadlineTimer *utils.Timer + bytesWritten int + notifiedSender bool + ) + for { + var copied bool + var deadline time.Time + // As soon as dataForWriting becomes smaller than a certain size x, we copy all the data to a STREAM frame (s.nextFrame), + // which can then be popped the next time we assemble a packet. + // This allows us to return Write() when all data but x bytes have been sent out. + // When the user now calls Close(), this is much more likely to happen before we popped that last STREAM frame, + // allowing us to set the FIN bit on that frame (instead of sending an empty STREAM frame with FIN). + if s.canBufferStreamFrame() && len(s.dataForWriting) > 0 { + if s.nextFrame == nil { + f := wire.GetStreamFrame() + f.Offset = s.writeOffset + f.StreamID = s.streamID + f.DataLenPresent = true + f.Data = f.Data[:len(s.dataForWriting)] + copy(f.Data, s.dataForWriting) + s.nextFrame = f + } else { + l := len(s.nextFrame.Data) + s.nextFrame.Data = s.nextFrame.Data[:l+len(s.dataForWriting)] + copy(s.nextFrame.Data[l:], s.dataForWriting) + } + s.dataForWriting = nil + bytesWritten = len(p) + copied = true + } else { + bytesWritten = len(p) - len(s.dataForWriting) + deadline = s.deadline + if !deadline.IsZero() { + if !time.Now().Before(deadline) { + s.dataForWriting = nil + return bytesWritten, errDeadline + } + if deadlineTimer == nil { + deadlineTimer = utils.NewTimer() + defer deadlineTimer.Stop() + } + deadlineTimer.Reset(deadline) + } + if s.dataForWriting == nil || s.cancelWriteErr != nil || s.closeForShutdownErr != nil { + break + } + } + + s.mutex.Unlock() + if !notifiedSender { + s.sender.onHasStreamData(s.streamID) // must be called without holding the mutex + notifiedSender = true + } + if copied { + s.mutex.Lock() + break + } + if deadline.IsZero() { + <-s.writeChan + } else { + select { + case <-s.writeChan: + case <-deadlineTimer.Chan(): + deadlineTimer.SetRead() + } + } + s.mutex.Lock() + } + + if bytesWritten == len(p) { + return bytesWritten, nil + } + if s.closeForShutdownErr != nil { + return bytesWritten, s.closeForShutdownErr + } else if s.cancelWriteErr != nil { + return bytesWritten, s.cancelWriteErr + } + return bytesWritten, nil +} + +func (s *sendStream) canBufferStreamFrame() bool { + var l protocol.ByteCount + if s.nextFrame != nil { + l = s.nextFrame.DataLen() + } + return l+protocol.ByteCount(len(s.dataForWriting)) <= protocol.MaxPacketBufferSize +} + +// popStreamFrame returns the next STREAM frame that is supposed to be sent on this stream +// maxBytes is the maximum length this frame (including frame header) will have. +func (s *sendStream) popStreamFrame(maxBytes protocol.ByteCount, v protocol.Version) (af ackhandler.StreamFrame, ok, hasMore bool) { + s.mutex.Lock() + f, hasMoreData := s.popNewOrRetransmittedStreamFrame(maxBytes, v) + if f != nil { + s.numOutstandingFrames++ + } + s.mutex.Unlock() + + if f == nil { + return ackhandler.StreamFrame{}, false, hasMoreData + } + return ackhandler.StreamFrame{ + Frame: f, + Handler: (*sendStreamAckHandler)(s), + }, true, hasMoreData +} + +func (s *sendStream) popNewOrRetransmittedStreamFrame(maxBytes protocol.ByteCount, v protocol.Version) (*wire.StreamFrame, bool /* has more data to send */) { + if s.cancelWriteErr != nil || s.closeForShutdownErr != nil { + return nil, false + } + + if len(s.retransmissionQueue) > 0 { + f, hasMoreRetransmissions := s.maybeGetRetransmission(maxBytes, v) + if f != nil || hasMoreRetransmissions { + if f == nil { + return nil, true + } + // We always claim that we have more data to send. + // This might be incorrect, in which case there'll be a spurious call to popStreamFrame in the future. + return f, true + } + } + + if len(s.dataForWriting) == 0 && s.nextFrame == nil { + if s.finishedWriting && !s.finSent { + s.finSent = true + return &wire.StreamFrame{ + StreamID: s.streamID, + Offset: s.writeOffset, + DataLenPresent: true, + Fin: true, + }, false + } + return nil, false + } + + sendWindow := s.flowController.SendWindowSize() + if sendWindow == 0 { + if isBlocked, offset := s.flowController.IsNewlyBlocked(); isBlocked { + s.sender.queueControlFrame(&wire.StreamDataBlockedFrame{ + StreamID: s.streamID, + MaximumStreamData: offset, + }) + return nil, false + } + return nil, true + } + + f, hasMoreData := s.popNewStreamFrame(maxBytes, sendWindow, v) + if dataLen := f.DataLen(); dataLen > 0 { + s.writeOffset += f.DataLen() + s.flowController.AddBytesSent(f.DataLen()) + } + f.Fin = s.finishedWriting && s.dataForWriting == nil && s.nextFrame == nil && !s.finSent + if f.Fin { + s.finSent = true + } + return f, hasMoreData +} + +func (s *sendStream) popNewStreamFrame(maxBytes, sendWindow protocol.ByteCount, v protocol.Version) (*wire.StreamFrame, bool) { + if s.nextFrame != nil { + nextFrame := s.nextFrame + s.nextFrame = nil + + maxDataLen := min(sendWindow, nextFrame.MaxDataLen(maxBytes, v)) + if nextFrame.DataLen() > maxDataLen { + s.nextFrame = wire.GetStreamFrame() + s.nextFrame.StreamID = s.streamID + s.nextFrame.Offset = s.writeOffset + maxDataLen + s.nextFrame.Data = s.nextFrame.Data[:nextFrame.DataLen()-maxDataLen] + s.nextFrame.DataLenPresent = true + copy(s.nextFrame.Data, nextFrame.Data[maxDataLen:]) + nextFrame.Data = nextFrame.Data[:maxDataLen] + } else { + s.signalWrite() + } + return nextFrame, s.nextFrame != nil || s.dataForWriting != nil + } + + f := wire.GetStreamFrame() + f.Fin = false + f.StreamID = s.streamID + f.Offset = s.writeOffset + f.DataLenPresent = true + f.Data = f.Data[:0] + + hasMoreData := s.popNewStreamFrameWithoutBuffer(f, maxBytes, sendWindow, v) + if len(f.Data) == 0 && !f.Fin { + f.PutBack() + return nil, hasMoreData + } + return f, hasMoreData +} + +func (s *sendStream) popNewStreamFrameWithoutBuffer(f *wire.StreamFrame, maxBytes, sendWindow protocol.ByteCount, v protocol.Version) bool { + maxDataLen := f.MaxDataLen(maxBytes, v) + if maxDataLen == 0 { // a STREAM frame must have at least one byte of data + return s.dataForWriting != nil || s.nextFrame != nil || s.finishedWriting + } + s.getDataForWriting(f, min(maxDataLen, sendWindow)) + + return s.dataForWriting != nil || s.nextFrame != nil || s.finishedWriting +} + +func (s *sendStream) maybeGetRetransmission(maxBytes protocol.ByteCount, v protocol.Version) (*wire.StreamFrame, bool /* has more retransmissions */) { + f := s.retransmissionQueue[0] + newFrame, needsSplit := f.MaybeSplitOffFrame(maxBytes, v) + if needsSplit { + return newFrame, true + } + s.retransmissionQueue = s.retransmissionQueue[1:] + return f, len(s.retransmissionQueue) > 0 +} + +func (s *sendStream) hasData() bool { + s.mutex.Lock() + hasData := len(s.dataForWriting) > 0 + s.mutex.Unlock() + return hasData +} + +func (s *sendStream) getDataForWriting(f *wire.StreamFrame, maxBytes protocol.ByteCount) { + if protocol.ByteCount(len(s.dataForWriting)) <= maxBytes { + f.Data = f.Data[:len(s.dataForWriting)] + copy(f.Data, s.dataForWriting) + s.dataForWriting = nil + s.signalWrite() + return + } + f.Data = f.Data[:maxBytes] + copy(f.Data, s.dataForWriting) + s.dataForWriting = s.dataForWriting[maxBytes:] + if s.canBufferStreamFrame() { + s.signalWrite() + } +} + +func (s *sendStream) isNewlyCompleted() bool { + completed := (s.finSent || s.cancelWriteErr != nil) && s.numOutstandingFrames == 0 && len(s.retransmissionQueue) == 0 + if completed && !s.completed { + s.completed = true + return true + } + return false +} + +func (s *sendStream) Close() error { + s.mutex.Lock() + if s.closeForShutdownErr != nil { + s.mutex.Unlock() + return nil + } + if s.cancelWriteErr != nil { + s.mutex.Unlock() + return fmt.Errorf("close called for canceled stream %d", s.streamID) + } + s.ctxCancel(nil) + s.finishedWriting = true + s.mutex.Unlock() + + s.sender.onHasStreamData(s.streamID) // need to send the FIN, must be called without holding the mutex + return nil +} + +func (s *sendStream) CancelWrite(errorCode StreamErrorCode) { + s.cancelWriteImpl(errorCode, false) +} + +// must be called after locking the mutex +func (s *sendStream) cancelWriteImpl(errorCode qerr.StreamErrorCode, remote bool) { + s.mutex.Lock() + if s.cancelWriteErr != nil { + s.mutex.Unlock() + return + } + s.cancelWriteErr = &StreamError{StreamID: s.streamID, ErrorCode: errorCode, Remote: remote} + s.ctxCancel(s.cancelWriteErr) + s.numOutstandingFrames = 0 + s.retransmissionQueue = nil + newlyCompleted := s.isNewlyCompleted() + s.mutex.Unlock() + + s.signalWrite() + s.sender.queueControlFrame(&wire.ResetStreamFrame{ + StreamID: s.streamID, + FinalSize: s.writeOffset, + ErrorCode: errorCode, + }) + if newlyCompleted { + s.sender.onStreamCompleted(s.streamID) + } +} + +func (s *sendStream) updateSendWindow(limit protocol.ByteCount) { + updated := s.flowController.UpdateSendWindow(limit) + if !updated { // duplicate or reordered MAX_STREAM_DATA frame + return + } + s.mutex.Lock() + hasStreamData := s.dataForWriting != nil || s.nextFrame != nil + s.mutex.Unlock() + if hasStreamData { + s.sender.onHasStreamData(s.streamID) + } +} + +func (s *sendStream) handleStopSendingFrame(frame *wire.StopSendingFrame) { + s.cancelWriteImpl(frame.ErrorCode, true) +} + +func (s *sendStream) Context() context.Context { + return s.ctx +} + +func (s *sendStream) SetWriteDeadline(t time.Time) error { + s.mutex.Lock() + s.deadline = t + s.mutex.Unlock() + s.signalWrite() + return nil +} + +// CloseForShutdown closes a stream abruptly. +// It makes Write unblock (and return the error) immediately. +// The peer will NOT be informed about this: the stream is closed without sending a FIN or RST. +func (s *sendStream) closeForShutdown(err error) { + s.mutex.Lock() + s.ctxCancel(err) + s.closeForShutdownErr = err + s.mutex.Unlock() + s.signalWrite() +} + +// signalWrite performs a non-blocking send on the writeChan +func (s *sendStream) signalWrite() { + select { + case s.writeChan <- struct{}{}: + default: + } +} + +type sendStreamAckHandler sendStream + +var _ ackhandler.FrameHandler = &sendStreamAckHandler{} + +func (s *sendStreamAckHandler) OnAcked(f wire.Frame) { + sf := f.(*wire.StreamFrame) + sf.PutBack() + s.mutex.Lock() + if s.cancelWriteErr != nil { + s.mutex.Unlock() + return + } + s.numOutstandingFrames-- + if s.numOutstandingFrames < 0 { + panic("numOutStandingFrames negative") + } + newlyCompleted := (*sendStream)(s).isNewlyCompleted() + s.mutex.Unlock() + + if newlyCompleted { + s.sender.onStreamCompleted(s.streamID) + } +} + +func (s *sendStreamAckHandler) OnLost(f wire.Frame) { + sf := f.(*wire.StreamFrame) + s.mutex.Lock() + if s.cancelWriteErr != nil { + s.mutex.Unlock() + return + } + sf.DataLenPresent = true + s.retransmissionQueue = append(s.retransmissionQueue, sf) + s.numOutstandingFrames-- + if s.numOutstandingFrames < 0 { + panic("numOutStandingFrames negative") + } + s.mutex.Unlock() + + s.sender.onHasStreamData(s.streamID) +} diff --git a/backend/vendor/github.com/enetx/uquic/server.go b/backend/vendor/github.com/enetx/uquic/server.go new file mode 100644 index 0000000..66f09e1 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/server.go @@ -0,0 +1,896 @@ +package quic + +import ( + "context" + "errors" + "fmt" + "net" + "sync" + "time" + + tls "github.com/enetx/utls" + + "github.com/enetx/uquic/internal/handshake" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/internal/wire" + "github.com/enetx/uquic/logging" +) + +// ErrServerClosed is returned by the Listener or EarlyListener's Accept method after a call to Close. +var ErrServerClosed = errors.New("quic: server closed") + +// packetHandler handles packets +type packetHandler interface { + handlePacket(receivedPacket) + destroy(error) + closeWithTransportError(qerr.TransportErrorCode) +} + +type packetHandlerManager interface { + Get(protocol.ConnectionID) (packetHandler, bool) + GetByResetToken(protocol.StatelessResetToken) (packetHandler, bool) + AddWithConnID(destConnID, newConnID protocol.ConnectionID, h packetHandler) bool + Close(error) + connRunner +} + +type quicConn interface { + EarlyConnection + earlyConnReady() <-chan struct{} + handlePacket(receivedPacket) + run() error + destroy(error) + closeWithTransportError(TransportErrorCode) +} + +type zeroRTTQueue struct { + packets []receivedPacket + expiration time.Time +} + +type rejectedPacket struct { + receivedPacket + hdr *wire.Header +} + +// A Listener of QUIC +type baseServer struct { + disableVersionNegotiation bool + acceptEarlyConns bool + + tlsConf *tls.Config + config *Config + + conn rawConn + + tokenGenerator *handshake.TokenGenerator + maxTokenAge time.Duration + + connIDGenerator ConnectionIDGenerator + connHandler packetHandlerManager + onClose func() + + receivedPackets chan receivedPacket + + nextZeroRTTCleanup time.Time + zeroRTTQueues map[protocol.ConnectionID]*zeroRTTQueue // only initialized if acceptEarlyConns == true + + // set as a member, so they can be set in the tests + newConn func( + sendConn, + connRunner, + protocol.ConnectionID, /* original dest connection ID */ + *protocol.ConnectionID, /* retry src connection ID */ + protocol.ConnectionID, /* client dest connection ID */ + protocol.ConnectionID, /* destination connection ID */ + protocol.ConnectionID, /* source connection ID */ + ConnectionIDGenerator, + protocol.StatelessResetToken, + *Config, + *tls.Config, + *handshake.TokenGenerator, + bool, /* client address validated by an address validation token */ + *logging.ConnectionTracer, + uint64, + utils.Logger, + protocol.Version, + ) quicConn + + closeMx sync.Mutex + errorChan chan struct{} // is closed when the server is closed + closeErr error + running chan struct{} // closed as soon as run() returns + + versionNegotiationQueue chan receivedPacket + invalidTokenQueue chan rejectedPacket + connectionRefusedQueue chan rejectedPacket + retryQueue chan rejectedPacket + + verifySourceAddress func(net.Addr) bool + + connQueue chan quicConn + + tracer *logging.Tracer + + logger utils.Logger +} + +// A Listener listens for incoming QUIC connections. +// It returns connections once the handshake has completed. +type Listener struct { + baseServer *baseServer +} + +// Accept returns new connections. It should be called in a loop. +func (l *Listener) Accept(ctx context.Context) (Connection, error) { + return l.baseServer.Accept(ctx) +} + +// Close closes the listener. +// Accept will return ErrServerClosed as soon as all connections in the accept queue have been accepted. +// QUIC handshakes that are still in flight will be rejected with a CONNECTION_REFUSED error. +// The effect of closing the listener depends on how it was created: +// * if it was created using Transport.Listen, already established connections will be unaffected +// * if it was created using the Listen convenience method, all established connection will be closed immediately +func (l *Listener) Close() error { + return l.baseServer.Close() +} + +// Addr returns the local network address that the server is listening on. +func (l *Listener) Addr() net.Addr { + return l.baseServer.Addr() +} + +// An EarlyListener listens for incoming QUIC connections, and returns them before the handshake completes. +// For connections that don't use 0-RTT, this allows the server to send 0.5-RTT data. +// This data is encrypted with forward-secure keys, however, the client's identity has not yet been verified. +// For connection using 0-RTT, this allows the server to accept and respond to streams that the client opened in the +// 0-RTT data it sent. Note that at this point during the handshake, the live-ness of the +// client has not yet been confirmed, and the 0-RTT data could have been replayed by an attacker. +type EarlyListener struct { + baseServer *baseServer +} + +// Accept returns a new connections. It should be called in a loop. +func (l *EarlyListener) Accept(ctx context.Context) (EarlyConnection, error) { + return l.baseServer.accept(ctx) +} + +// Close the server. All active connections will be closed. +func (l *EarlyListener) Close() error { + return l.baseServer.Close() +} + +// Addr returns the local network addr that the server is listening on. +func (l *EarlyListener) Addr() net.Addr { + return l.baseServer.Addr() +} + +// ListenAddr creates a QUIC server listening on a given address. +// See Listen for more details. +func ListenAddr(addr string, tlsConf *tls.Config, config *Config) (*Listener, error) { + conn, err := listenUDP(addr) + if err != nil { + return nil, err + } + return (&Transport{ + Conn: conn, + createdConn: true, + isSingleUse: true, + }).Listen(tlsConf, config) +} + +// ListenAddrEarly works like ListenAddr, but it returns connections before the handshake completes. +func ListenAddrEarly(addr string, tlsConf *tls.Config, config *Config) (*EarlyListener, error) { + conn, err := listenUDP(addr) + if err != nil { + return nil, err + } + return (&Transport{ + Conn: conn, + createdConn: true, + isSingleUse: true, + }).ListenEarly(tlsConf, config) +} + +func listenUDP(addr string) (*net.UDPConn, error) { + udpAddr, err := net.ResolveUDPAddr("udp", addr) + if err != nil { + return nil, err + } + return net.ListenUDP("udp", udpAddr) +} + +// Listen listens for QUIC connections on a given net.PacketConn. +// If the PacketConn satisfies the OOBCapablePacketConn interface (as a net.UDPConn does), +// ECN and packet info support will be enabled. In this case, ReadMsgUDP and WriteMsgUDP +// will be used instead of ReadFrom and WriteTo to read/write packets. +// A single net.PacketConn can only be used for a single call to Listen. +// +// The tls.Config must not be nil and must contain a certificate configuration. +// Furthermore, it must define an application control (using NextProtos). +// The quic.Config may be nil, in that case the default values will be used. +// +// This is a convenience function. More advanced use cases should instantiate a Transport, +// which offers configuration options for a more fine-grained control of the connection establishment, +// including reusing the underlying UDP socket for outgoing QUIC connections. +// When closing a listener created with Listen, all established QUIC connections will be closed immediately. +func Listen(conn net.PacketConn, tlsConf *tls.Config, config *Config) (*Listener, error) { + tr := &Transport{Conn: conn, isSingleUse: true} + return tr.Listen(tlsConf, config) +} + +// ListenEarly works like Listen, but it returns connections before the handshake completes. +func ListenEarly(conn net.PacketConn, tlsConf *tls.Config, config *Config) (*EarlyListener, error) { + tr := &Transport{Conn: conn, isSingleUse: true} + return tr.ListenEarly(tlsConf, config) +} + +func newServer( + conn rawConn, + connHandler packetHandlerManager, + connIDGenerator ConnectionIDGenerator, + tlsConf *tls.Config, + config *Config, + tracer *logging.Tracer, + onClose func(), + tokenGeneratorKey TokenGeneratorKey, + maxTokenAge time.Duration, + verifySourceAddress func(net.Addr) bool, + disableVersionNegotiation bool, + acceptEarly bool, +) *baseServer { + s := &baseServer{ + conn: conn, + tlsConf: tlsConf, + config: config, + tokenGenerator: handshake.NewTokenGenerator(tokenGeneratorKey), + maxTokenAge: maxTokenAge, + verifySourceAddress: verifySourceAddress, + connIDGenerator: connIDGenerator, + connHandler: connHandler, + connQueue: make(chan quicConn, protocol.MaxAcceptQueueSize), + errorChan: make(chan struct{}), + running: make(chan struct{}), + receivedPackets: make(chan receivedPacket, protocol.MaxServerUnprocessedPackets), + versionNegotiationQueue: make(chan receivedPacket, 4), + invalidTokenQueue: make(chan rejectedPacket, 4), + connectionRefusedQueue: make(chan rejectedPacket, 4), + retryQueue: make(chan rejectedPacket, 8), + newConn: newConnection, + tracer: tracer, + logger: utils.DefaultLogger.WithPrefix("server"), + acceptEarlyConns: acceptEarly, + disableVersionNegotiation: disableVersionNegotiation, + onClose: onClose, + } + if acceptEarly { + s.zeroRTTQueues = map[protocol.ConnectionID]*zeroRTTQueue{} + } + go s.run() + go s.runSendQueue() + s.logger.Debugf("Listening for %s connections on %s", conn.LocalAddr().Network(), conn.LocalAddr().String()) + return s +} + +func (s *baseServer) run() { + defer close(s.running) + for { + select { + case <-s.errorChan: + return + default: + } + select { + case <-s.errorChan: + return + case p := <-s.receivedPackets: + if bufferStillInUse := s.handlePacketImpl(p); !bufferStillInUse { + p.buffer.Release() + } + } + } +} + +func (s *baseServer) runSendQueue() { + for { + select { + case <-s.running: + return + case p := <-s.versionNegotiationQueue: + s.maybeSendVersionNegotiationPacket(p) + case p := <-s.invalidTokenQueue: + s.maybeSendInvalidToken(p) + case p := <-s.connectionRefusedQueue: + s.sendConnectionRefused(p) + case p := <-s.retryQueue: + s.sendRetry(p) + } + } +} + +// Accept returns connections that already completed the handshake. +// It is only valid if acceptEarlyConns is false. +func (s *baseServer) Accept(ctx context.Context) (Connection, error) { + return s.accept(ctx) +} + +func (s *baseServer) accept(ctx context.Context) (quicConn, error) { + select { + case <-ctx.Done(): + return nil, ctx.Err() + case conn := <-s.connQueue: + return conn, nil + case <-s.errorChan: + return nil, s.closeErr + } +} + +func (s *baseServer) Close() error { + s.close(ErrServerClosed, true) + return nil +} + +func (s *baseServer) close(e error, notifyOnClose bool) { + s.closeMx.Lock() + if s.closeErr != nil { + s.closeMx.Unlock() + return + } + s.closeErr = e + close(s.errorChan) + <-s.running + s.closeMx.Unlock() + + if notifyOnClose { + s.onClose() + } +} + +// Addr returns the server's network address +func (s *baseServer) Addr() net.Addr { + return s.conn.LocalAddr() +} + +func (s *baseServer) handlePacket(p receivedPacket) { + select { + case s.receivedPackets <- p: + default: + s.logger.Debugf("Dropping packet from %s (%d bytes). Server receive queue full.", p.remoteAddr, p.Size()) + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketTypeNotDetermined, p.Size(), logging.PacketDropDOSPrevention) + } + } +} + +func (s *baseServer) handlePacketImpl(p receivedPacket) bool /* is the buffer still in use? */ { + if !s.nextZeroRTTCleanup.IsZero() && p.rcvTime.After(s.nextZeroRTTCleanup) { + defer s.cleanupZeroRTTQueues(p.rcvTime) + } + + if wire.IsVersionNegotiationPacket(p.data) { + s.logger.Debugf("Dropping Version Negotiation packet.") + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketTypeVersionNegotiation, p.Size(), logging.PacketDropUnexpectedPacket) + } + return false + } + // Short header packets should never end up here in the first place + if !wire.IsLongHeaderPacket(p.data[0]) { + panic(fmt.Sprintf("misrouted packet: %#v", p.data)) + } + v, err := wire.ParseVersion(p.data) + // drop the packet if we failed to parse the protocol version + if err != nil { + s.logger.Debugf("Dropping a packet with an unknown version") + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketTypeNotDetermined, p.Size(), logging.PacketDropUnexpectedPacket) + } + return false + } + // send a Version Negotiation Packet if the client is speaking a different protocol version + if !protocol.IsSupportedVersion(s.config.Versions, v) { + if s.disableVersionNegotiation { + return false + } + + if p.Size() < protocol.MinUnknownVersionPacketSize { + s.logger.Debugf("Dropping a packet with an unsupported version number %d that is too small (%d bytes)", v, p.Size()) + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketTypeNotDetermined, p.Size(), logging.PacketDropUnexpectedPacket) + } + return false + } + return s.enqueueVersionNegotiationPacket(p) + } + + if wire.Is0RTTPacket(p.data) { + if !s.acceptEarlyConns { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketType0RTT, p.Size(), logging.PacketDropUnexpectedPacket) + } + return false + } + return s.handle0RTTPacket(p) + } + + // If we're creating a new connection, the packet will be passed to the connection. + // The header will then be parsed again. + hdr, _, _, err := wire.ParsePacket(p.data) + if err != nil { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketTypeNotDetermined, p.Size(), logging.PacketDropHeaderParseError) + } + s.logger.Debugf("Error parsing packet: %s", err) + return false + } + if hdr.Type == protocol.PacketTypeInitial && p.Size() < protocol.MinInitialPacketSize { + s.logger.Debugf("Dropping a packet that is too small to be a valid Initial (%d bytes)", p.Size()) + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketTypeInitial, p.Size(), logging.PacketDropUnexpectedPacket) + } + return false + } + + if hdr.Type != protocol.PacketTypeInitial { + // Drop long header packets. + // There's little point in sending a Stateless Reset, since the client + // might not have received the token yet. + s.logger.Debugf("Dropping long header packet of type %s (%d bytes)", hdr.Type, len(p.data)) + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketTypeFromHeader(hdr), p.Size(), logging.PacketDropUnexpectedPacket) + } + return false + } + + s.logger.Debugf("<- Received Initial packet.") + + if err := s.handleInitialImpl(p, hdr); err != nil { + s.logger.Errorf("Error occurred handling initial packet: %s", err) + } + // Don't put the packet buffer back. + // handleInitialImpl deals with the buffer. + return true +} + +func (s *baseServer) handle0RTTPacket(p receivedPacket) bool { + connID, err := wire.ParseConnectionID(p.data, 0) + if err != nil { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketType0RTT, p.Size(), logging.PacketDropHeaderParseError) + } + return false + } + + // check again if we might have a connection now + if handler, ok := s.connHandler.Get(connID); ok { + handler.handlePacket(p) + return true + } + + if q, ok := s.zeroRTTQueues[connID]; ok { + if len(q.packets) >= protocol.Max0RTTQueueLen { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketType0RTT, p.Size(), logging.PacketDropDOSPrevention) + } + return false + } + q.packets = append(q.packets, p) + return true + } + + if len(s.zeroRTTQueues) >= protocol.Max0RTTQueues { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketType0RTT, p.Size(), logging.PacketDropDOSPrevention) + } + return false + } + queue := &zeroRTTQueue{packets: make([]receivedPacket, 1, 8)} + queue.packets[0] = p + expiration := p.rcvTime.Add(protocol.Max0RTTQueueingDuration) + queue.expiration = expiration + if s.nextZeroRTTCleanup.IsZero() || s.nextZeroRTTCleanup.After(expiration) { + s.nextZeroRTTCleanup = expiration + } + s.zeroRTTQueues[connID] = queue + return true +} + +func (s *baseServer) cleanupZeroRTTQueues(now time.Time) { + // Iterate over all queues to find those that are expired. + // This is ok since we're placing a pretty low limit on the number of queues. + var nextCleanup time.Time + for connID, q := range s.zeroRTTQueues { + if q.expiration.After(now) { + if nextCleanup.IsZero() || nextCleanup.After(q.expiration) { + nextCleanup = q.expiration + } + continue + } + for _, p := range q.packets { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketType0RTT, p.Size(), logging.PacketDropDOSPrevention) + } + p.buffer.Release() + } + delete(s.zeroRTTQueues, connID) + if s.logger.Debug() { + s.logger.Debugf("Removing 0-RTT queue for %s.", connID) + } + } + s.nextZeroRTTCleanup = nextCleanup +} + +// validateToken returns false if: +// - address is invalid +// - token is expired +// - token is null +func (s *baseServer) validateToken(token *handshake.Token, addr net.Addr) bool { + if token == nil { + return false + } + if !token.ValidateRemoteAddr(addr) { + return false + } + if !token.IsRetryToken && time.Since(token.SentTime) > s.maxTokenAge { + return false + } + if token.IsRetryToken && time.Since(token.SentTime) > s.config.maxRetryTokenAge() { + return false + } + return true +} + +func (s *baseServer) handleInitialImpl(p receivedPacket, hdr *wire.Header) error { + if len(hdr.Token) == 0 && hdr.DestConnectionID.Len() < protocol.MinConnectionIDLenInitial { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketTypeInitial, p.Size(), logging.PacketDropUnexpectedPacket) + } + p.buffer.Release() + return errors.New("too short connection ID") + } + + // The server queues packets for a while, and we might already have established a connection by now. + // This results in a second check in the connection map. + // That's ok since it's not the hot path (it's only taken by some Initial and 0-RTT packets). + if handler, ok := s.connHandler.Get(hdr.DestConnectionID); ok { + handler.handlePacket(p) + return nil + } + + var ( + token *handshake.Token + retrySrcConnID *protocol.ConnectionID + clientAddrVerified bool + ) + origDestConnID := hdr.DestConnectionID + if len(hdr.Token) > 0 { + tok, err := s.tokenGenerator.DecodeToken(hdr.Token) + if err == nil { + if tok.IsRetryToken { + origDestConnID = tok.OriginalDestConnectionID + retrySrcConnID = &tok.RetrySrcConnectionID + } + token = tok + } + } + if token != nil { + clientAddrVerified = s.validateToken(token, p.remoteAddr) + if !clientAddrVerified { + // For invalid and expired non-retry tokens, we don't send an INVALID_TOKEN error. + // We just ignore them, and act as if there was no token on this packet at all. + // This also means we might send a Retry later. + if !token.IsRetryToken { + token = nil + } else { + // For Retry tokens, we send an INVALID_ERROR if + // * the token is too old, or + // * the token is invalid, in case of a retry token. + select { + case s.invalidTokenQueue <- rejectedPacket{receivedPacket: p, hdr: hdr}: + default: + // drop packet if we can't send out the INVALID_TOKEN packets fast enough + p.buffer.Release() + } + return nil + } + } + } + + if token == nil && s.verifySourceAddress != nil && s.verifySourceAddress(p.remoteAddr) { + // Retry invalidates all 0-RTT packets sent. + delete(s.zeroRTTQueues, hdr.DestConnectionID) + select { + case s.retryQueue <- rejectedPacket{receivedPacket: p, hdr: hdr}: + default: + // drop packet if we can't send out Retry packets fast enough + p.buffer.Release() + } + return nil + } + + config := s.config + if s.config.GetConfigForClient != nil { + conf, err := s.config.GetConfigForClient(&ClientHelloInfo{ + RemoteAddr: p.remoteAddr, + AddrVerified: clientAddrVerified, + }) + if err != nil { + s.logger.Debugf("Rejecting new connection due to GetConfigForClient callback") + delete(s.zeroRTTQueues, hdr.DestConnectionID) + select { + case s.connectionRefusedQueue <- rejectedPacket{receivedPacket: p, hdr: hdr}: + default: + // drop packet if we can't send out the CONNECTION_REFUSED fast enough + p.buffer.Release() + } + return nil + } + config = populateConfig(conf) + } + + var conn quicConn + tracingID := nextConnTracingID() + var tracer *logging.ConnectionTracer + if config.Tracer != nil { + // Use the same connection ID that is passed to the client's GetLogWriter callback. + connID := hdr.DestConnectionID + if origDestConnID.Len() > 0 { + connID = origDestConnID + } + tracer = config.Tracer(context.WithValue(context.Background(), ConnectionTracingKey, tracingID), protocol.PerspectiveServer, connID) + } + connID, err := s.connIDGenerator.GenerateConnectionID() + if err != nil { + return err + } + s.logger.Debugf("Changing connection ID to %s.", connID) + conn = s.newConn( + newSendConn(s.conn, p.remoteAddr, p.info, s.logger), + s.connHandler, + origDestConnID, + retrySrcConnID, + hdr.DestConnectionID, + hdr.SrcConnectionID, + connID, + s.connIDGenerator, + s.connHandler.GetStatelessResetToken(connID), + config, + s.tlsConf, + s.tokenGenerator, + clientAddrVerified, + tracer, + tracingID, + s.logger, + hdr.Version, + ) + conn.handlePacket(p) + // Adding the connection will fail if the client's chosen Destination Connection ID is already in use. + // This is very unlikely: Even if an attacker chooses a connection ID that's already in use, + // under normal circumstances the packet would just be routed to that connection. + // The only time this collision will occur if we receive the two Initial packets at the same time. + if added := s.connHandler.AddWithConnID(hdr.DestConnectionID, connID, conn); !added { + delete(s.zeroRTTQueues, hdr.DestConnectionID) + conn.closeWithTransportError(qerr.ConnectionRefused) + return nil + } + // Pass queued 0-RTT to the newly established connection. + if q, ok := s.zeroRTTQueues[hdr.DestConnectionID]; ok { + for _, p := range q.packets { + conn.handlePacket(p) + } + delete(s.zeroRTTQueues, hdr.DestConnectionID) + } + + go conn.run() + go func() { + if completed := s.handleNewConn(conn); !completed { + return + } + + select { + case s.connQueue <- conn: + default: + conn.closeWithTransportError(ConnectionRefused) + } + }() + return nil +} + +func (s *baseServer) handleNewConn(conn quicConn) bool { + if s.acceptEarlyConns { + // wait until the early connection is ready, the handshake fails, or the server is closed + select { + case <-s.errorChan: + conn.closeWithTransportError(ConnectionRefused) + return false + case <-conn.Context().Done(): + return false + case <-conn.earlyConnReady(): + return true + } + } + // wait until the handshake completes, fails, or the server is closed + select { + case <-s.errorChan: + conn.closeWithTransportError(ConnectionRefused) + return false + case <-conn.Context().Done(): + return false + case <-conn.HandshakeComplete(): + return true + } +} + +func (s *baseServer) sendRetry(p rejectedPacket) { + if err := s.sendRetryPacket(p); err != nil { + s.logger.Debugf("Error sending Retry packet: %s", err) + } +} + +func (s *baseServer) sendRetryPacket(p rejectedPacket) error { + hdr := p.hdr + // Log the Initial packet now. + // If no Retry is sent, the packet will be logged by the connection. + (&wire.ExtendedHeader{Header: *hdr}).Log(s.logger) + srcConnID, err := s.connIDGenerator.GenerateConnectionID() + if err != nil { + return err + } + token, err := s.tokenGenerator.NewRetryToken(p.remoteAddr, hdr.DestConnectionID, srcConnID) + if err != nil { + return err + } + replyHdr := &wire.ExtendedHeader{} + replyHdr.Type = protocol.PacketTypeRetry + replyHdr.Version = hdr.Version + replyHdr.SrcConnectionID = srcConnID + replyHdr.DestConnectionID = hdr.SrcConnectionID + replyHdr.Token = token + if s.logger.Debug() { + s.logger.Debugf("Changing connection ID to %s.", srcConnID) + s.logger.Debugf("-> Sending Retry") + replyHdr.Log(s.logger) + } + + buf := getPacketBuffer() + defer buf.Release() + buf.Data, err = replyHdr.Append(buf.Data, hdr.Version) + if err != nil { + return err + } + // append the Retry integrity tag + tag := handshake.GetRetryIntegrityTag(buf.Data, hdr.DestConnectionID, hdr.Version) + buf.Data = append(buf.Data, tag[:]...) + if s.tracer != nil && s.tracer.SentPacket != nil { + s.tracer.SentPacket(p.remoteAddr, &replyHdr.Header, protocol.ByteCount(len(buf.Data)), nil) + } + _, err = s.conn.WritePacket(buf.Data, p.remoteAddr, p.info.OOB(), 0, protocol.ECNUnsupported) + return err +} + +func (s *baseServer) maybeSendInvalidToken(p rejectedPacket) { + defer p.buffer.Release() + + // Only send INVALID_TOKEN if we can unprotect the packet. + // This makes sure that we won't send it for packets that were corrupted. + hdr := p.hdr + sealer, opener := handshake.NewInitialAEAD(hdr.DestConnectionID, protocol.PerspectiveServer, hdr.Version) + data := p.data[:hdr.ParsedLen()+hdr.Length] + extHdr, err := unpackLongHeader(opener, hdr, data, hdr.Version) + // Only send INVALID_TOKEN if we can unprotect the packet. + // This makes sure that we won't send it for packets that were corrupted. + if err != nil { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketTypeInitial, p.Size(), logging.PacketDropHeaderParseError) + } + return + } + hdrLen := extHdr.ParsedLen() + if _, err := opener.Open(data[hdrLen:hdrLen], data[hdrLen:], extHdr.PacketNumber, data[:hdrLen]); err != nil { + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketTypeInitial, p.Size(), logging.PacketDropPayloadDecryptError) + } + return + } + if s.logger.Debug() { + s.logger.Debugf("Client sent an invalid retry token. Sending INVALID_TOKEN to %s.", p.remoteAddr) + } + if err := s.sendError(p.remoteAddr, hdr, sealer, qerr.InvalidToken, p.info); err != nil { + s.logger.Debugf("Error sending INVALID_TOKEN error: %s", err) + } +} + +func (s *baseServer) sendConnectionRefused(p rejectedPacket) { + defer p.buffer.Release() + sealer, _ := handshake.NewInitialAEAD(p.hdr.DestConnectionID, protocol.PerspectiveServer, p.hdr.Version) + if err := s.sendError(p.remoteAddr, p.hdr, sealer, qerr.ConnectionRefused, p.info); err != nil { + s.logger.Debugf("Error sending CONNECTION_REFUSED error: %s", err) + } +} + +// sendError sends the error as a response to the packet received with header hdr +func (s *baseServer) sendError(remoteAddr net.Addr, hdr *wire.Header, sealer handshake.LongHeaderSealer, errorCode qerr.TransportErrorCode, info packetInfo) error { + b := getPacketBuffer() + defer b.Release() + + ccf := &wire.ConnectionCloseFrame{ErrorCode: uint64(errorCode)} + + replyHdr := &wire.ExtendedHeader{} + replyHdr.Type = protocol.PacketTypeInitial + replyHdr.Version = hdr.Version + replyHdr.SrcConnectionID = hdr.DestConnectionID + replyHdr.DestConnectionID = hdr.SrcConnectionID + replyHdr.PacketNumberLen = protocol.PacketNumberLen4 + replyHdr.Length = 4 /* packet number len */ + ccf.Length(hdr.Version) + protocol.ByteCount(sealer.Overhead()) + var err error + b.Data, err = replyHdr.Append(b.Data, hdr.Version) + if err != nil { + return err + } + payloadOffset := len(b.Data) + + b.Data, err = ccf.Append(b.Data, hdr.Version) + if err != nil { + return err + } + + _ = sealer.Seal(b.Data[payloadOffset:payloadOffset], b.Data[payloadOffset:], replyHdr.PacketNumber, b.Data[:payloadOffset]) + b.Data = b.Data[0 : len(b.Data)+sealer.Overhead()] + + pnOffset := payloadOffset - int(replyHdr.PacketNumberLen) + sealer.EncryptHeader( + b.Data[pnOffset+4:pnOffset+4+16], + &b.Data[0], + b.Data[pnOffset:payloadOffset], + ) + + replyHdr.Log(s.logger) + wire.LogFrame(s.logger, ccf, true) + if s.tracer != nil && s.tracer.SentPacket != nil { + s.tracer.SentPacket(remoteAddr, &replyHdr.Header, protocol.ByteCount(len(b.Data)), []logging.Frame{ccf}) + } + _, err = s.conn.WritePacket(b.Data, remoteAddr, info.OOB(), 0, protocol.ECNUnsupported) + return err +} + +func (s *baseServer) enqueueVersionNegotiationPacket(p receivedPacket) (bufferInUse bool) { + select { + case s.versionNegotiationQueue <- p: + return true + default: + // it's fine to not send version negotiation packets when we are busy + } + return false +} + +func (s *baseServer) maybeSendVersionNegotiationPacket(p receivedPacket) { + defer p.buffer.Release() + + v, err := wire.ParseVersion(p.data) + if err != nil { + s.logger.Debugf("failed to parse version for sending version negotiation packet: %s", err) + return + } + + _, src, dest, err := wire.ParseArbitraryLenConnectionIDs(p.data) + if err != nil { // should never happen + s.logger.Debugf("Dropping a packet with an unknown version for which we failed to parse connection IDs") + if s.tracer != nil && s.tracer.DroppedPacket != nil { + s.tracer.DroppedPacket(p.remoteAddr, logging.PacketTypeNotDetermined, p.Size(), logging.PacketDropUnexpectedPacket) + } + return + } + + s.logger.Debugf("Client offered version %s, sending Version Negotiation", v) + + data := wire.ComposeVersionNegotiation(dest, src, s.config.Versions) + if s.tracer != nil && s.tracer.SentVersionNegotiationPacket != nil { + s.tracer.SentVersionNegotiationPacket(p.remoteAddr, src, dest, s.config.Versions) + } + if _, err := s.conn.WritePacket(data, p.remoteAddr, p.info.OOB(), 0, protocol.ECNUnsupported); err != nil { + s.logger.Debugf("Error sending Version Negotiation: %s", err) + } +} diff --git a/backend/vendor/github.com/enetx/uquic/stream.go b/backend/vendor/github.com/enetx/uquic/stream.go new file mode 100644 index 0000000..9cf3419 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/stream.go @@ -0,0 +1,146 @@ +package quic + +import ( + "net" + "os" + "sync" + "time" + + "github.com/enetx/uquic/internal/ackhandler" + "github.com/enetx/uquic/internal/flowcontrol" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/wire" +) + +type deadlineError struct{} + +func (deadlineError) Error() string { return "deadline exceeded" } +func (deadlineError) Temporary() bool { return true } +func (deadlineError) Timeout() bool { return true } +func (deadlineError) Unwrap() error { return os.ErrDeadlineExceeded } + +var errDeadline net.Error = &deadlineError{} + +// The streamSender is notified by the stream about various events. +type streamSender interface { + queueControlFrame(wire.Frame) + onHasStreamData(protocol.StreamID) + // must be called without holding the mutex that is acquired by closeForShutdown + onStreamCompleted(protocol.StreamID) +} + +// Each of the both stream halves gets its own uniStreamSender. +// This is necessary in order to keep track when both halves have been completed. +type uniStreamSender struct { + streamSender + onStreamCompletedImpl func() +} + +func (s *uniStreamSender) queueControlFrame(f wire.Frame) { + s.streamSender.queueControlFrame(f) +} + +func (s *uniStreamSender) onHasStreamData(id protocol.StreamID) { + s.streamSender.onHasStreamData(id) +} + +func (s *uniStreamSender) onStreamCompleted(protocol.StreamID) { + s.onStreamCompletedImpl() +} + +var _ streamSender = &uniStreamSender{} + +type streamI interface { + Stream + closeForShutdown(error) + // for receiving + handleStreamFrame(*wire.StreamFrame) error + handleResetStreamFrame(*wire.ResetStreamFrame) error + getWindowUpdate() protocol.ByteCount + // for sending + hasData() bool + handleStopSendingFrame(*wire.StopSendingFrame) + popStreamFrame(maxBytes protocol.ByteCount, v protocol.Version) (ackhandler.StreamFrame, bool, bool) + updateSendWindow(protocol.ByteCount) +} + +var ( + _ receiveStreamI = (streamI)(nil) + _ sendStreamI = (streamI)(nil) +) + +// A Stream assembles the data from StreamFrames and provides a super-convenient Read-Interface +// +// Read() and Write() may be called concurrently, but multiple calls to Read() or Write() individually must be synchronized manually. +type stream struct { + receiveStream + sendStream + + completedMutex sync.Mutex + sender streamSender + receiveStreamCompleted bool + sendStreamCompleted bool +} + +var _ Stream = &stream{} + +// newStream creates a new Stream +func newStream(streamID protocol.StreamID, + sender streamSender, + flowController flowcontrol.StreamFlowController, +) *stream { + s := &stream{sender: sender} + senderForSendStream := &uniStreamSender{ + streamSender: sender, + onStreamCompletedImpl: func() { + s.completedMutex.Lock() + s.sendStreamCompleted = true + s.checkIfCompleted() + s.completedMutex.Unlock() + }, + } + s.sendStream = *newSendStream(streamID, senderForSendStream, flowController) + senderForReceiveStream := &uniStreamSender{ + streamSender: sender, + onStreamCompletedImpl: func() { + s.completedMutex.Lock() + s.receiveStreamCompleted = true + s.checkIfCompleted() + s.completedMutex.Unlock() + }, + } + s.receiveStream = *newReceiveStream(streamID, senderForReceiveStream, flowController) + return s +} + +// need to define StreamID() here, since both receiveStream and readStream have a StreamID() +func (s *stream) StreamID() protocol.StreamID { + // the result is same for receiveStream and sendStream + return s.sendStream.StreamID() +} + +func (s *stream) Close() error { + return s.sendStream.Close() +} + +func (s *stream) SetDeadline(t time.Time) error { + _ = s.SetReadDeadline(t) // SetReadDeadline never errors + _ = s.SetWriteDeadline(t) // SetWriteDeadline never errors + return nil +} + +// CloseForShutdown closes a stream abruptly. +// It makes Read and Write unblock (and return the error) immediately. +// The peer will NOT be informed about this: the stream is closed without sending a FIN or RST. +func (s *stream) closeForShutdown(err error) { + s.sendStream.closeForShutdown(err) + s.receiveStream.closeForShutdown(err) +} + +// checkIfCompleted is called from the uniStreamSender, when one of the stream halves is completed. +// It makes sure that the onStreamCompleted callback is only called if both receive and send side have completed. +func (s *stream) checkIfCompleted() { + if s.sendStreamCompleted && s.receiveStreamCompleted { + s.sender.onStreamCompleted(s.StreamID()) + } +} diff --git a/backend/vendor/github.com/enetx/uquic/streams_map.go b/backend/vendor/github.com/enetx/uquic/streams_map.go new file mode 100644 index 0000000..7a0cfb0 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/streams_map.go @@ -0,0 +1,318 @@ +package quic + +import ( + "context" + "errors" + "fmt" + "net" + "sync" + + "github.com/enetx/uquic/internal/flowcontrol" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/qerr" + "github.com/enetx/uquic/internal/wire" +) + +type streamError struct { + message string + nums []protocol.StreamNum +} + +func (e streamError) Error() string { + return e.message +} + +func convertStreamError(err error, stype protocol.StreamType, pers protocol.Perspective) error { + strError, ok := err.(streamError) + if !ok { + return err + } + ids := make([]interface{}, len(strError.nums)) + for i, num := range strError.nums { + ids[i] = num.StreamID(stype, pers) + } + return fmt.Errorf(strError.Error(), ids...) +} + +type streamOpenErr struct{ error } + +var _ net.Error = &streamOpenErr{} + +func (e streamOpenErr) Temporary() bool { return e.error == errTooManyOpenStreams } +func (streamOpenErr) Timeout() bool { return false } + +// errTooManyOpenStreams is used internally by the outgoing streams maps. +var errTooManyOpenStreams = errors.New("too many open streams") + +type streamsMap struct { + perspective protocol.Perspective + + maxIncomingBidiStreams uint64 + maxIncomingUniStreams uint64 + + sender streamSender + newFlowController func(protocol.StreamID) flowcontrol.StreamFlowController + + mutex sync.Mutex + outgoingBidiStreams *outgoingStreamsMap[streamI] + outgoingUniStreams *outgoingStreamsMap[sendStreamI] + incomingBidiStreams *incomingStreamsMap[streamI] + incomingUniStreams *incomingStreamsMap[receiveStreamI] + reset bool +} + +var _ streamManager = &streamsMap{} + +func newStreamsMap( + sender streamSender, + newFlowController func(protocol.StreamID) flowcontrol.StreamFlowController, + maxIncomingBidiStreams uint64, + maxIncomingUniStreams uint64, + perspective protocol.Perspective, +) streamManager { + m := &streamsMap{ + perspective: perspective, + newFlowController: newFlowController, + maxIncomingBidiStreams: maxIncomingBidiStreams, + maxIncomingUniStreams: maxIncomingUniStreams, + sender: sender, + } + m.initMaps() + return m +} + +func (m *streamsMap) initMaps() { + m.outgoingBidiStreams = newOutgoingStreamsMap( + protocol.StreamTypeBidi, + func(num protocol.StreamNum) streamI { + id := num.StreamID(protocol.StreamTypeBidi, m.perspective) + return newStream(id, m.sender, m.newFlowController(id)) + }, + m.sender.queueControlFrame, + ) + m.incomingBidiStreams = newIncomingStreamsMap( + protocol.StreamTypeBidi, + func(num protocol.StreamNum) streamI { + id := num.StreamID(protocol.StreamTypeBidi, m.perspective.Opposite()) + return newStream(id, m.sender, m.newFlowController(id)) + }, + m.maxIncomingBidiStreams, + m.sender.queueControlFrame, + ) + m.outgoingUniStreams = newOutgoingStreamsMap( + protocol.StreamTypeUni, + func(num protocol.StreamNum) sendStreamI { + id := num.StreamID(protocol.StreamTypeUni, m.perspective) + return newSendStream(id, m.sender, m.newFlowController(id)) + }, + m.sender.queueControlFrame, + ) + m.incomingUniStreams = newIncomingStreamsMap( + protocol.StreamTypeUni, + func(num protocol.StreamNum) receiveStreamI { + id := num.StreamID(protocol.StreamTypeUni, m.perspective.Opposite()) + return newReceiveStream(id, m.sender, m.newFlowController(id)) + }, + m.maxIncomingUniStreams, + m.sender.queueControlFrame, + ) +} + +func (m *streamsMap) OpenStream() (Stream, error) { + m.mutex.Lock() + reset := m.reset + mm := m.outgoingBidiStreams + m.mutex.Unlock() + if reset { + return nil, Err0RTTRejected + } + str, err := mm.OpenStream() + return str, convertStreamError(err, protocol.StreamTypeBidi, m.perspective) +} + +func (m *streamsMap) OpenStreamSync(ctx context.Context) (Stream, error) { + m.mutex.Lock() + reset := m.reset + mm := m.outgoingBidiStreams + m.mutex.Unlock() + if reset { + return nil, Err0RTTRejected + } + str, err := mm.OpenStreamSync(ctx) + return str, convertStreamError(err, protocol.StreamTypeBidi, m.perspective) +} + +func (m *streamsMap) OpenUniStream() (SendStream, error) { + m.mutex.Lock() + reset := m.reset + mm := m.outgoingUniStreams + m.mutex.Unlock() + if reset { + return nil, Err0RTTRejected + } + str, err := mm.OpenStream() + return str, convertStreamError(err, protocol.StreamTypeBidi, m.perspective) +} + +func (m *streamsMap) OpenUniStreamSync(ctx context.Context) (SendStream, error) { + m.mutex.Lock() + reset := m.reset + mm := m.outgoingUniStreams + m.mutex.Unlock() + if reset { + return nil, Err0RTTRejected + } + str, err := mm.OpenStreamSync(ctx) + return str, convertStreamError(err, protocol.StreamTypeUni, m.perspective) +} + +func (m *streamsMap) AcceptStream(ctx context.Context) (Stream, error) { + m.mutex.Lock() + reset := m.reset + mm := m.incomingBidiStreams + m.mutex.Unlock() + if reset { + return nil, Err0RTTRejected + } + str, err := mm.AcceptStream(ctx) + return str, convertStreamError(err, protocol.StreamTypeBidi, m.perspective.Opposite()) +} + +func (m *streamsMap) AcceptUniStream(ctx context.Context) (ReceiveStream, error) { + m.mutex.Lock() + reset := m.reset + mm := m.incomingUniStreams + m.mutex.Unlock() + if reset { + return nil, Err0RTTRejected + } + str, err := mm.AcceptStream(ctx) + return str, convertStreamError(err, protocol.StreamTypeUni, m.perspective.Opposite()) +} + +func (m *streamsMap) DeleteStream(id protocol.StreamID) error { + num := id.StreamNum() + switch id.Type() { + case protocol.StreamTypeUni: + if id.InitiatedBy() == m.perspective { + return convertStreamError(m.outgoingUniStreams.DeleteStream(num), protocol.StreamTypeUni, m.perspective) + } + return convertStreamError(m.incomingUniStreams.DeleteStream(num), protocol.StreamTypeUni, m.perspective.Opposite()) + case protocol.StreamTypeBidi: + if id.InitiatedBy() == m.perspective { + return convertStreamError(m.outgoingBidiStreams.DeleteStream(num), protocol.StreamTypeBidi, m.perspective) + } + return convertStreamError(m.incomingBidiStreams.DeleteStream(num), protocol.StreamTypeBidi, m.perspective.Opposite()) + } + panic("") +} + +func (m *streamsMap) GetOrOpenReceiveStream(id protocol.StreamID) (receiveStreamI, error) { + str, err := m.getOrOpenReceiveStream(id) + if err != nil { + return nil, &qerr.TransportError{ + ErrorCode: qerr.StreamStateError, + ErrorMessage: err.Error(), + } + } + return str, nil +} + +func (m *streamsMap) getOrOpenReceiveStream(id protocol.StreamID) (receiveStreamI, error) { + num := id.StreamNum() + switch id.Type() { + case protocol.StreamTypeUni: + if id.InitiatedBy() == m.perspective { + // an outgoing unidirectional stream is a send stream, not a receive stream + return nil, fmt.Errorf("peer attempted to open receive stream %d", id) + } + str, err := m.incomingUniStreams.GetOrOpenStream(num) + return str, convertStreamError(err, protocol.StreamTypeUni, m.perspective) + case protocol.StreamTypeBidi: + var str receiveStreamI + var err error + if id.InitiatedBy() == m.perspective { + str, err = m.outgoingBidiStreams.GetStream(num) + } else { + str, err = m.incomingBidiStreams.GetOrOpenStream(num) + } + return str, convertStreamError(err, protocol.StreamTypeBidi, id.InitiatedBy()) + } + panic("") +} + +func (m *streamsMap) GetOrOpenSendStream(id protocol.StreamID) (sendStreamI, error) { + str, err := m.getOrOpenSendStream(id) + if err != nil { + return nil, &qerr.TransportError{ + ErrorCode: qerr.StreamStateError, + ErrorMessage: err.Error(), + } + } + return str, nil +} + +func (m *streamsMap) getOrOpenSendStream(id protocol.StreamID) (sendStreamI, error) { + num := id.StreamNum() + switch id.Type() { + case protocol.StreamTypeUni: + if id.InitiatedBy() == m.perspective { + str, err := m.outgoingUniStreams.GetStream(num) + return str, convertStreamError(err, protocol.StreamTypeUni, m.perspective) + } + // an incoming unidirectional stream is a receive stream, not a send stream + return nil, fmt.Errorf("peer attempted to open send stream %d", id) + case protocol.StreamTypeBidi: + var str sendStreamI + var err error + if id.InitiatedBy() == m.perspective { + str, err = m.outgoingBidiStreams.GetStream(num) + } else { + str, err = m.incomingBidiStreams.GetOrOpenStream(num) + } + return str, convertStreamError(err, protocol.StreamTypeBidi, id.InitiatedBy()) + } + panic("") +} + +func (m *streamsMap) HandleMaxStreamsFrame(f *wire.MaxStreamsFrame) { + switch f.Type { + case protocol.StreamTypeUni: + m.outgoingUniStreams.SetMaxStream(f.MaxStreamNum) + case protocol.StreamTypeBidi: + m.outgoingBidiStreams.SetMaxStream(f.MaxStreamNum) + } +} + +func (m *streamsMap) UpdateLimits(p *wire.TransportParameters) { + m.outgoingBidiStreams.UpdateSendWindow(p.InitialMaxStreamDataBidiRemote) + m.outgoingBidiStreams.SetMaxStream(p.MaxBidiStreamNum) + m.outgoingUniStreams.UpdateSendWindow(p.InitialMaxStreamDataUni) + m.outgoingUniStreams.SetMaxStream(p.MaxUniStreamNum) +} + +func (m *streamsMap) CloseWithError(err error) { + m.outgoingBidiStreams.CloseWithError(err) + m.outgoingUniStreams.CloseWithError(err) + m.incomingBidiStreams.CloseWithError(err) + m.incomingUniStreams.CloseWithError(err) +} + +// ResetFor0RTT resets is used when 0-RTT is rejected. In that case, the streams maps are +// 1. closed with an Err0RTTRejected, making calls to Open{Uni}Stream{Sync} / Accept{Uni}Stream return that error. +// 2. reset to their initial state, such that we can immediately process new incoming stream data. +// Afterwards, calls to Open{Uni}Stream{Sync} / Accept{Uni}Stream will continue to return the error, +// until UseResetMaps() has been called. +func (m *streamsMap) ResetFor0RTT() { + m.mutex.Lock() + defer m.mutex.Unlock() + m.reset = true + m.CloseWithError(Err0RTTRejected) + m.initMaps() +} + +func (m *streamsMap) UseResetMaps() { + m.mutex.Lock() + m.reset = false + m.mutex.Unlock() +} diff --git a/backend/vendor/github.com/enetx/uquic/streams_map_incoming.go b/backend/vendor/github.com/enetx/uquic/streams_map_incoming.go new file mode 100644 index 0000000..14a7fc8 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/streams_map_incoming.go @@ -0,0 +1,195 @@ +package quic + +import ( + "context" + "sync" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/wire" +) + +type incomingStream interface { + closeForShutdown(error) +} + +// When a stream is deleted before it was accepted, we can't delete it from the map immediately. +// We need to wait until the application accepts it, and delete it then. +type incomingStreamEntry[T incomingStream] struct { + stream T + shouldDelete bool +} + +type incomingStreamsMap[T incomingStream] struct { + mutex sync.RWMutex + newStreamChan chan struct{} + + streamType protocol.StreamType + streams map[protocol.StreamNum]incomingStreamEntry[T] + + nextStreamToAccept protocol.StreamNum // the next stream that will be returned by AcceptStream() + nextStreamToOpen protocol.StreamNum // the highest stream that the peer opened + maxStream protocol.StreamNum // the highest stream that the peer is allowed to open + maxNumStreams uint64 // maximum number of streams + + newStream func(protocol.StreamNum) T + queueMaxStreamID func(*wire.MaxStreamsFrame) + + closeErr error +} + +func newIncomingStreamsMap[T incomingStream]( + streamType protocol.StreamType, + newStream func(protocol.StreamNum) T, + maxStreams uint64, + queueControlFrame func(wire.Frame), +) *incomingStreamsMap[T] { + return &incomingStreamsMap[T]{ + newStreamChan: make(chan struct{}, 1), + streamType: streamType, + streams: make(map[protocol.StreamNum]incomingStreamEntry[T]), + maxStream: protocol.StreamNum(maxStreams), + maxNumStreams: maxStreams, + newStream: newStream, + nextStreamToOpen: 1, + nextStreamToAccept: 1, + queueMaxStreamID: func(f *wire.MaxStreamsFrame) { queueControlFrame(f) }, + } +} + +func (m *incomingStreamsMap[T]) AcceptStream(ctx context.Context) (T, error) { + // drain the newStreamChan, so we don't check the map twice if the stream doesn't exist + select { + case <-m.newStreamChan: + default: + } + + m.mutex.Lock() + + var num protocol.StreamNum + var entry incomingStreamEntry[T] + for { + num = m.nextStreamToAccept + if m.closeErr != nil { + m.mutex.Unlock() + return *new(T), m.closeErr + } + var ok bool + entry, ok = m.streams[num] + if ok { + break + } + m.mutex.Unlock() + select { + case <-ctx.Done(): + return *new(T), ctx.Err() + case <-m.newStreamChan: + } + m.mutex.Lock() + } + m.nextStreamToAccept++ + // If this stream was completed before being accepted, we can delete it now. + if entry.shouldDelete { + if err := m.deleteStream(num); err != nil { + m.mutex.Unlock() + return *new(T), err + } + } + m.mutex.Unlock() + return entry.stream, nil +} + +func (m *incomingStreamsMap[T]) GetOrOpenStream(num protocol.StreamNum) (T, error) { + m.mutex.RLock() + if num > m.maxStream { + m.mutex.RUnlock() + return *new(T), streamError{ + message: "peer tried to open stream %d (current limit: %d)", + nums: []protocol.StreamNum{num, m.maxStream}, + } + } + // if the num is smaller than the highest we accepted + // * this stream exists in the map, and we can return it, or + // * this stream was already closed, then we can return the nil + if num < m.nextStreamToOpen { + var s T + // If the stream was already queued for deletion, and is just waiting to be accepted, don't return it. + if entry, ok := m.streams[num]; ok && !entry.shouldDelete { + s = entry.stream + } + m.mutex.RUnlock() + return s, nil + } + m.mutex.RUnlock() + + m.mutex.Lock() + // no need to check the two error conditions from above again + // * maxStream can only increase, so if the id was valid before, it definitely is valid now + // * highestStream is only modified by this function + for newNum := m.nextStreamToOpen; newNum <= num; newNum++ { + m.streams[newNum] = incomingStreamEntry[T]{stream: m.newStream(newNum)} + select { + case m.newStreamChan <- struct{}{}: + default: + } + } + m.nextStreamToOpen = num + 1 + entry := m.streams[num] + m.mutex.Unlock() + return entry.stream, nil +} + +func (m *incomingStreamsMap[T]) DeleteStream(num protocol.StreamNum) error { + m.mutex.Lock() + defer m.mutex.Unlock() + + return m.deleteStream(num) +} + +func (m *incomingStreamsMap[T]) deleteStream(num protocol.StreamNum) error { + if _, ok := m.streams[num]; !ok { + return streamError{ + message: "tried to delete unknown incoming stream %d", + nums: []protocol.StreamNum{num}, + } + } + + // Don't delete this stream yet, if it was not yet accepted. + // Just save it to streamsToDelete map, to make sure it is deleted as soon as it gets accepted. + if num >= m.nextStreamToAccept { + entry, ok := m.streams[num] + if ok && entry.shouldDelete { + return streamError{ + message: "tried to delete incoming stream %d multiple times", + nums: []protocol.StreamNum{num}, + } + } + entry.shouldDelete = true + m.streams[num] = entry // can't assign to struct in map, so we need to reassign + return nil + } + + delete(m.streams, num) + // queue a MAX_STREAM_ID frame, giving the peer the option to open a new stream + if m.maxNumStreams > uint64(len(m.streams)) { + maxStream := m.nextStreamToOpen + protocol.StreamNum(m.maxNumStreams-uint64(len(m.streams))) - 1 + // Never send a value larger than protocol.MaxStreamCount. + if maxStream <= protocol.MaxStreamCount { + m.maxStream = maxStream + m.queueMaxStreamID(&wire.MaxStreamsFrame{ + Type: m.streamType, + MaxStreamNum: m.maxStream, + }) + } + } + return nil +} + +func (m *incomingStreamsMap[T]) CloseWithError(err error) { + m.mutex.Lock() + m.closeErr = err + for _, entry := range m.streams { + entry.stream.closeForShutdown(err) + } + m.mutex.Unlock() + close(m.newStreamChan) +} diff --git a/backend/vendor/github.com/enetx/uquic/streams_map_outgoing.go b/backend/vendor/github.com/enetx/uquic/streams_map_outgoing.go new file mode 100644 index 0000000..5d2fe85 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/streams_map_outgoing.go @@ -0,0 +1,230 @@ +package quic + +import ( + "context" + "sync" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/wire" +) + +type outgoingStream interface { + updateSendWindow(protocol.ByteCount) + closeForShutdown(error) +} + +type outgoingStreamsMap[T outgoingStream] struct { + mutex sync.RWMutex + + streamType protocol.StreamType + streams map[protocol.StreamNum]T + + openQueue map[uint64]chan struct{} + lowestInQueue uint64 + highestInQueue uint64 + + nextStream protocol.StreamNum // stream ID of the stream returned by OpenStream(Sync) + maxStream protocol.StreamNum // the maximum stream ID we're allowed to open + blockedSent bool // was a STREAMS_BLOCKED sent for the current maxStream + + newStream func(protocol.StreamNum) T + queueStreamIDBlocked func(*wire.StreamsBlockedFrame) + + closeErr error +} + +func newOutgoingStreamsMap[T outgoingStream]( + streamType protocol.StreamType, + newStream func(protocol.StreamNum) T, + queueControlFrame func(wire.Frame), +) *outgoingStreamsMap[T] { + return &outgoingStreamsMap[T]{ + streamType: streamType, + streams: make(map[protocol.StreamNum]T), + openQueue: make(map[uint64]chan struct{}), + maxStream: protocol.InvalidStreamNum, + nextStream: 1, + newStream: newStream, + queueStreamIDBlocked: func(f *wire.StreamsBlockedFrame) { queueControlFrame(f) }, + } +} + +func (m *outgoingStreamsMap[T]) OpenStream() (T, error) { + m.mutex.Lock() + defer m.mutex.Unlock() + + if m.closeErr != nil { + return *new(T), m.closeErr + } + + // if there are OpenStreamSync calls waiting, return an error here + if len(m.openQueue) > 0 || m.nextStream > m.maxStream { + m.maybeSendBlockedFrame() + return *new(T), streamOpenErr{errTooManyOpenStreams} + } + return m.openStream(), nil +} + +func (m *outgoingStreamsMap[T]) OpenStreamSync(ctx context.Context) (T, error) { + m.mutex.Lock() + defer m.mutex.Unlock() + + if m.closeErr != nil { + return *new(T), m.closeErr + } + + if err := ctx.Err(); err != nil { + return *new(T), err + } + + if len(m.openQueue) == 0 && m.nextStream <= m.maxStream { + return m.openStream(), nil + } + + waitChan := make(chan struct{}, 1) + queuePos := m.highestInQueue + m.highestInQueue++ + if len(m.openQueue) == 0 { + m.lowestInQueue = queuePos + } + m.openQueue[queuePos] = waitChan + m.maybeSendBlockedFrame() + + for { + m.mutex.Unlock() + select { + case <-ctx.Done(): + m.mutex.Lock() + delete(m.openQueue, queuePos) + return *new(T), ctx.Err() + case <-waitChan: + } + m.mutex.Lock() + + if m.closeErr != nil { + return *new(T), m.closeErr + } + if m.nextStream > m.maxStream { + // no stream available. Continue waiting + continue + } + str := m.openStream() + delete(m.openQueue, queuePos) + m.lowestInQueue = queuePos + 1 + m.unblockOpenSync() + return str, nil + } +} + +func (m *outgoingStreamsMap[T]) openStream() T { + s := m.newStream(m.nextStream) + m.streams[m.nextStream] = s + m.nextStream++ + return s +} + +// maybeSendBlockedFrame queues a STREAMS_BLOCKED frame for the current stream offset, +// if we haven't sent one for this offset yet +func (m *outgoingStreamsMap[T]) maybeSendBlockedFrame() { + if m.blockedSent { + return + } + + var streamNum protocol.StreamNum + if m.maxStream != protocol.InvalidStreamNum { + streamNum = m.maxStream + } + m.queueStreamIDBlocked(&wire.StreamsBlockedFrame{ + Type: m.streamType, + StreamLimit: streamNum, + }) + m.blockedSent = true +} + +func (m *outgoingStreamsMap[T]) GetStream(num protocol.StreamNum) (T, error) { + m.mutex.RLock() + if num >= m.nextStream { + m.mutex.RUnlock() + return *new(T), streamError{ + message: "peer attempted to open stream %d", + nums: []protocol.StreamNum{num}, + } + } + s := m.streams[num] + m.mutex.RUnlock() + return s, nil +} + +func (m *outgoingStreamsMap[T]) DeleteStream(num protocol.StreamNum) error { + m.mutex.Lock() + defer m.mutex.Unlock() + + if _, ok := m.streams[num]; !ok { + return streamError{ + message: "tried to delete unknown outgoing stream %d", + nums: []protocol.StreamNum{num}, + } + } + delete(m.streams, num) + return nil +} + +func (m *outgoingStreamsMap[T]) SetMaxStream(num protocol.StreamNum) { + m.mutex.Lock() + defer m.mutex.Unlock() + + if num <= m.maxStream { + return + } + m.maxStream = num + m.blockedSent = false + if m.maxStream < m.nextStream-1+protocol.StreamNum(len(m.openQueue)) { + m.maybeSendBlockedFrame() + } + m.unblockOpenSync() +} + +// UpdateSendWindow is called when the peer's transport parameters are received. +// Only in the case of a 0-RTT handshake will we have open streams at this point. +// We might need to update the send window, in case the server increased it. +func (m *outgoingStreamsMap[T]) UpdateSendWindow(limit protocol.ByteCount) { + m.mutex.Lock() + for _, str := range m.streams { + str.updateSendWindow(limit) + } + m.mutex.Unlock() +} + +// unblockOpenSync unblocks the next OpenStreamSync go-routine to open a new stream +func (m *outgoingStreamsMap[T]) unblockOpenSync() { + if len(m.openQueue) == 0 { + return + } + for qp := m.lowestInQueue; qp <= m.highestInQueue; qp++ { + c, ok := m.openQueue[qp] + if !ok { // entry was deleted because the context was canceled + continue + } + // unblockOpenSync is called both from OpenStreamSync and from SetMaxStream. + // It's sufficient to only unblock OpenStreamSync once. + select { + case c <- struct{}{}: + default: + } + return + } +} + +func (m *outgoingStreamsMap[T]) CloseWithError(err error) { + m.mutex.Lock() + m.closeErr = err + for _, str := range m.streams { + str.closeForShutdown(err) + } + for _, c := range m.openQueue { + if c != nil { + close(c) + } + } + m.mutex.Unlock() +} diff --git a/backend/vendor/github.com/enetx/uquic/sys_conn.go b/backend/vendor/github.com/enetx/uquic/sys_conn.go new file mode 100644 index 0000000..8dcc06a --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/sys_conn.go @@ -0,0 +1,117 @@ +package quic + +import ( + "log" + "net" + "os" + "strconv" + "strings" + "syscall" + "time" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" +) + +// OOBCapablePacketConn is a connection that allows the reading of ECN bits from the IP header. +// If the PacketConn passed to Dial or Listen satisfies this interface, quic-go will use it. +// In this case, ReadMsgUDP() will be used instead of ReadFrom() to read packets. +type OOBCapablePacketConn interface { + net.PacketConn + SyscallConn() (syscall.RawConn, error) + SetReadBuffer(int) error + ReadMsgUDP(b, oob []byte) (n, oobn, flags int, addr *net.UDPAddr, err error) + WriteMsgUDP(b, oob []byte, addr *net.UDPAddr) (n, oobn int, err error) +} + +var _ OOBCapablePacketConn = &net.UDPConn{} + +func wrapConn(pc net.PacketConn) (rawConn, error) { + if err := setReceiveBuffer(pc); err != nil { + if !strings.Contains(err.Error(), "use of closed network connection") { + setBufferWarningOnce.Do(func() { + if disable, _ := strconv.ParseBool(os.Getenv("QUIC_GO_DISABLE_RECEIVE_BUFFER_WARNING")); disable { + return + } + log.Printf("%s. See https://github.com/enetx/uquic/wiki/UDP-Buffer-Sizes for details.", err) + }) + } + } + if err := setSendBuffer(pc); err != nil { + if !strings.Contains(err.Error(), "use of closed network connection") { + setBufferWarningOnce.Do(func() { + if disable, _ := strconv.ParseBool(os.Getenv("QUIC_GO_DISABLE_RECEIVE_BUFFER_WARNING")); disable { + return + } + log.Printf("%s. See https://github.com/enetx/uquic/wiki/UDP-Buffer-Sizes for details.", err) + }) + } + } + + conn, ok := pc.(interface { + SyscallConn() (syscall.RawConn, error) + }) + var supportsDF bool + if ok { + rawConn, err := conn.SyscallConn() + if err != nil { + return nil, err + } + + if _, ok := pc.LocalAddr().(*net.UDPAddr); ok { + // Only set DF on sockets that we expect to be able to handle that configuration. + var err error + supportsDF, err = setDF(rawConn) + if err != nil { + return nil, err + } + } + } + c, ok := pc.(OOBCapablePacketConn) + if !ok { + utils.DefaultLogger.Infof("PacketConn is not a net.UDPConn. Disabling optimizations possible on UDP connections.") + return &basicConn{PacketConn: pc, supportsDF: supportsDF}, nil + } + return newConn(c, supportsDF) +} + +// The basicConn is the most trivial implementation of a rawConn. +// It reads a single packet from the underlying net.PacketConn. +// It is used when +// * the net.PacketConn is not a OOBCapablePacketConn, and +// * when the OS doesn't support OOB. +type basicConn struct { + net.PacketConn + supportsDF bool +} + +var _ rawConn = &basicConn{} + +func (c *basicConn) ReadPacket() (receivedPacket, error) { + buffer := getPacketBuffer() + // The packet size should not exceed protocol.MaxPacketBufferSize bytes + // If it does, we only read a truncated packet, which will then end up undecryptable + buffer.Data = buffer.Data[:protocol.MaxPacketBufferSize] + n, addr, err := c.PacketConn.ReadFrom(buffer.Data) + if err != nil { + return receivedPacket{}, err + } + return receivedPacket{ + remoteAddr: addr, + rcvTime: time.Now(), + data: buffer.Data[:n], + buffer: buffer, + }, nil +} + +func (c *basicConn) WritePacket(b []byte, addr net.Addr, _ []byte, gsoSize uint16, ecn protocol.ECN) (n int, err error) { + if gsoSize != 0 { + panic("cannot use GSO with a basicConn") + } + if ecn != protocol.ECNUnsupported { + panic("cannot use ECN with a basicConn") + } + return c.PacketConn.WriteTo(b, addr) +} + +func (c *basicConn) capabilities() connCapabilities { return connCapabilities{DF: c.supportsDF} } diff --git a/backend/vendor/github.com/enetx/uquic/sys_conn_buffers.go b/backend/vendor/github.com/enetx/uquic/sys_conn_buffers.go new file mode 100644 index 0000000..edae872 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/sys_conn_buffers.go @@ -0,0 +1,68 @@ +package quic + +import ( + "errors" + "fmt" + "net" + "syscall" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" +) + +//go:generate sh -c "echo '// Code generated by go generate. DO NOT EDIT.\n// Source: sys_conn_buffers.go\n' > sys_conn_buffers_write.go && sed -e 's/SetReadBuffer/SetWriteBuffer/g' -e 's/setReceiveBuffer/setSendBuffer/g' -e 's/inspectReadBuffer/inspectWriteBuffer/g' -e 's/protocol\\.DesiredReceiveBufferSize/protocol\\.DesiredSendBufferSize/g' -e 's/forceSetReceiveBuffer/forceSetSendBuffer/g' -e 's/receive buffer/send buffer/g' sys_conn_buffers.go | sed '/^\\/\\/go:generate/d' >> sys_conn_buffers_write.go" +func setReceiveBuffer(c net.PacketConn) error { + conn, ok := c.(interface{ SetReadBuffer(int) error }) + if !ok { + return errors.New("connection doesn't allow setting of receive buffer size. Not a *net.UDPConn?") + } + + var syscallConn syscall.RawConn + if sc, ok := c.(interface { + SyscallConn() (syscall.RawConn, error) + }); ok { + var err error + syscallConn, err = sc.SyscallConn() + if err != nil { + syscallConn = nil + } + } + // The connection has a SetReadBuffer method, but we couldn't obtain a syscall.RawConn. + // This shouldn't happen for a net.UDPConn, but is possible if the connection just implements the + // net.PacketConn interface and the SetReadBuffer method. + // We have no way of checking if increasing the buffer size actually worked. + if syscallConn == nil { + return conn.SetReadBuffer(protocol.DesiredReceiveBufferSize) + } + + size, err := inspectReadBuffer(syscallConn) + if err != nil { + return fmt.Errorf("failed to determine receive buffer size: %w", err) + } + if size >= protocol.DesiredReceiveBufferSize { + utils.DefaultLogger.Debugf("Conn has receive buffer of %d kiB (wanted: at least %d kiB)", size/1024, protocol.DesiredReceiveBufferSize/1024) + return nil + } + // Ignore the error. We check if we succeeded by querying the buffer size afterward. + _ = conn.SetReadBuffer(protocol.DesiredReceiveBufferSize) + newSize, err := inspectReadBuffer(syscallConn) + if newSize < protocol.DesiredReceiveBufferSize { + // Try again with RCVBUFFORCE on Linux + _ = forceSetReceiveBuffer(syscallConn, protocol.DesiredReceiveBufferSize) + newSize, err = inspectReadBuffer(syscallConn) + if err != nil { + return fmt.Errorf("failed to determine receive buffer size: %w", err) + } + } + if err != nil { + return fmt.Errorf("failed to determine receive buffer size: %w", err) + } + if newSize == size { + return fmt.Errorf("failed to increase receive buffer size (wanted: %d kiB, got %d kiB)", protocol.DesiredReceiveBufferSize/1024, newSize/1024) + } + if newSize < protocol.DesiredReceiveBufferSize { + return fmt.Errorf("failed to sufficiently increase receive buffer size (was: %d kiB, wanted: %d kiB, got: %d kiB)", size/1024, protocol.DesiredReceiveBufferSize/1024, newSize/1024) + } + utils.DefaultLogger.Debugf("Increased receive buffer size to %d kiB", newSize/1024) + return nil +} diff --git a/backend/vendor/github.com/enetx/uquic/sys_conn_buffers_write.go b/backend/vendor/github.com/enetx/uquic/sys_conn_buffers_write.go new file mode 100644 index 0000000..4676316 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/sys_conn_buffers_write.go @@ -0,0 +1,70 @@ +// Code generated by go generate. DO NOT EDIT. +// Source: sys_conn_buffers.go + +package quic + +import ( + "errors" + "fmt" + "net" + "syscall" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" +) + +func setSendBuffer(c net.PacketConn) error { + conn, ok := c.(interface{ SetWriteBuffer(int) error }) + if !ok { + return errors.New("connection doesn't allow setting of send buffer size. Not a *net.UDPConn?") + } + + var syscallConn syscall.RawConn + if sc, ok := c.(interface { + SyscallConn() (syscall.RawConn, error) + }); ok { + var err error + syscallConn, err = sc.SyscallConn() + if err != nil { + syscallConn = nil + } + } + // The connection has a SetWriteBuffer method, but we couldn't obtain a syscall.RawConn. + // This shouldn't happen for a net.UDPConn, but is possible if the connection just implements the + // net.PacketConn interface and the SetWriteBuffer method. + // We have no way of checking if increasing the buffer size actually worked. + if syscallConn == nil { + return conn.SetWriteBuffer(protocol.DesiredSendBufferSize) + } + + size, err := inspectWriteBuffer(syscallConn) + if err != nil { + return fmt.Errorf("failed to determine send buffer size: %w", err) + } + if size >= protocol.DesiredSendBufferSize { + utils.DefaultLogger.Debugf("Conn has send buffer of %d kiB (wanted: at least %d kiB)", size/1024, protocol.DesiredSendBufferSize/1024) + return nil + } + // Ignore the error. We check if we succeeded by querying the buffer size afterward. + _ = conn.SetWriteBuffer(protocol.DesiredSendBufferSize) + newSize, err := inspectWriteBuffer(syscallConn) + if newSize < protocol.DesiredSendBufferSize { + // Try again with RCVBUFFORCE on Linux + _ = forceSetSendBuffer(syscallConn, protocol.DesiredSendBufferSize) + newSize, err = inspectWriteBuffer(syscallConn) + if err != nil { + return fmt.Errorf("failed to determine send buffer size: %w", err) + } + } + if err != nil { + return fmt.Errorf("failed to determine send buffer size: %w", err) + } + if newSize == size { + return fmt.Errorf("failed to increase send buffer size (wanted: %d kiB, got %d kiB)", protocol.DesiredSendBufferSize/1024, newSize/1024) + } + if newSize < protocol.DesiredSendBufferSize { + return fmt.Errorf("failed to sufficiently increase send buffer size (was: %d kiB, wanted: %d kiB, got: %d kiB)", size/1024, protocol.DesiredSendBufferSize/1024, newSize/1024) + } + utils.DefaultLogger.Debugf("Increased send buffer size to %d kiB", newSize/1024) + return nil +} diff --git a/backend/vendor/github.com/enetx/uquic/sys_conn_df.go b/backend/vendor/github.com/enetx/uquic/sys_conn_df.go new file mode 100644 index 0000000..0db6150 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/sys_conn_df.go @@ -0,0 +1,22 @@ +//go:build !linux && !windows && !darwin + +package quic + +import ( + "syscall" +) + +func setDF(syscall.RawConn) (bool, error) { + // no-op on unsupported platforms + return false, nil +} + +func isSendMsgSizeErr(err error) bool { + // to be implemented for more specific platforms + return false +} + +func isRecvMsgSizeErr(err error) bool { + // to be implemented for more specific platforms + return false +} diff --git a/backend/vendor/github.com/enetx/uquic/sys_conn_df_darwin.go b/backend/vendor/github.com/enetx/uquic/sys_conn_df_darwin.go new file mode 100644 index 0000000..476ee79 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/sys_conn_df_darwin.go @@ -0,0 +1,74 @@ +//go:build darwin + +package quic + +import ( + "errors" + "strconv" + "strings" + "syscall" + + "golang.org/x/sys/unix" + + "github.com/enetx/uquic/internal/utils" +) + +func setDF(rawConn syscall.RawConn) (bool, error) { + // Setting DF bit is only supported from macOS11 + // https://github.com/chromium/chromium/blob/117.0.5881.2/net/socket/udp_socket_posix.cc#L555 + if supportsDF, err := isAtLeastMacOS11(); !supportsDF || err != nil { + return false, err + } + + // Enabling IP_DONTFRAG will force the kernel to return "sendto: message too long" + // and the datagram will not be fragmented + var errDFIPv4, errDFIPv6 error + if err := rawConn.Control(func(fd uintptr) { + errDFIPv4 = unix.SetsockoptInt(int(fd), unix.IPPROTO_IP, unix.IP_DONTFRAG, 1) + errDFIPv6 = unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_DONTFRAG, 1) + }); err != nil { + return false, err + } + switch { + case errDFIPv4 == nil && errDFIPv6 == nil: + utils.DefaultLogger.Debugf("Setting DF for IPv4 and IPv6.") + case errDFIPv4 == nil && errDFIPv6 != nil: + utils.DefaultLogger.Debugf("Setting DF for IPv4.") + case errDFIPv4 != nil && errDFIPv6 == nil: + utils.DefaultLogger.Debugf("Setting DF for IPv6.") + // On macOS, the syscall for setting DF bit for IPv4 fails on dual-stack listeners. + // Treat the connection as not having DF enabled, even though the DF bit will be set + // when used for IPv6. + // See https://github.com/enetx/uquic/issues/3793 for details. + return false, nil + case errDFIPv4 != nil && errDFIPv6 != nil: + return false, errors.New("setting DF failed for both IPv4 and IPv6") + } + return true, nil +} + +func isSendMsgSizeErr(err error) bool { + return errors.Is(err, unix.EMSGSIZE) +} + +func isRecvMsgSizeErr(error) bool { return false } + +func isAtLeastMacOS11() (bool, error) { + uname := &unix.Utsname{} + err := unix.Uname(uname) + if err != nil { + return false, err + } + + release := string(uname.Release[:]) + if idx := strings.Index(release, "."); idx != -1 { + version, err := strconv.Atoi(release[:idx]) + if err != nil { + return false, err + } + // Darwin version 20 is macOS version 11 + // https://en.wikipedia.org/wiki/Darwin_(operating_system)#Darwin_20_onwards + return version >= 20, nil + } + return false, nil +} diff --git a/backend/vendor/github.com/enetx/uquic/sys_conn_df_linux.go b/backend/vendor/github.com/enetx/uquic/sys_conn_df_linux.go new file mode 100644 index 0000000..5154dba --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/sys_conn_df_linux.go @@ -0,0 +1,42 @@ +//go:build linux + +package quic + +import ( + "errors" + "syscall" + + "golang.org/x/sys/unix" + + "github.com/enetx/uquic/internal/utils" +) + +func setDF(rawConn syscall.RawConn) (bool, error) { + // Enabling IP_MTU_DISCOVER will force the kernel to return "sendto: message too long" + // and the datagram will not be fragmented + var errDFIPv4, errDFIPv6 error + if err := rawConn.Control(func(fd uintptr) { + errDFIPv4 = unix.SetsockoptInt(int(fd), unix.IPPROTO_IP, unix.IP_MTU_DISCOVER, unix.IP_PMTUDISC_DO) + errDFIPv6 = unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_MTU_DISCOVER, unix.IPV6_PMTUDISC_DO) + }); err != nil { + return false, err + } + switch { + case errDFIPv4 == nil && errDFIPv6 == nil: + utils.DefaultLogger.Debugf("Setting DF for IPv4 and IPv6.") + case errDFIPv4 == nil && errDFIPv6 != nil: + utils.DefaultLogger.Debugf("Setting DF for IPv4.") + case errDFIPv4 != nil && errDFIPv6 == nil: + utils.DefaultLogger.Debugf("Setting DF for IPv6.") + case errDFIPv4 != nil && errDFIPv6 != nil: + return false, errors.New("setting DF failed for both IPv4 and IPv6") + } + return true, nil +} + +func isSendMsgSizeErr(err error) bool { + // https://man7.org/linux/man-pages/man7/udp.7.html + return errors.Is(err, unix.EMSGSIZE) +} + +func isRecvMsgSizeErr(error) bool { return false } diff --git a/backend/vendor/github.com/enetx/uquic/sys_conn_df_windows.go b/backend/vendor/github.com/enetx/uquic/sys_conn_df_windows.go new file mode 100644 index 0000000..4dd9e09 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/sys_conn_df_windows.go @@ -0,0 +1,54 @@ +//go:build windows + +package quic + +import ( + "errors" + "syscall" + + "golang.org/x/sys/windows" + + "github.com/enetx/uquic/internal/utils" +) + +const ( + // IP_DONTFRAGMENT controls the Don't Fragment (DF) bit. + // + // It's the same code point for both IPv4 and IPv6 on Windows. + // https://microsoft.github.io/windows-docs-rs/doc/windows/Win32/Networking/WinSock/constant.IP_DONTFRAG.html + // https://microsoft.github.io/windows-docs-rs/doc/windows/Win32/Networking/WinSock/constant.IPV6_DONTFRAG.html + // + //nolint:stylecheck + IP_DONTFRAGMENT = 14 +) + +func setDF(rawConn syscall.RawConn) (bool, error) { + var errDFIPv4, errDFIPv6 error + if err := rawConn.Control(func(fd uintptr) { + errDFIPv4 = windows.SetsockoptInt(windows.Handle(fd), windows.IPPROTO_IP, IP_DONTFRAGMENT, 1) + errDFIPv6 = windows.SetsockoptInt(windows.Handle(fd), windows.IPPROTO_IPV6, IP_DONTFRAGMENT, 1) + }); err != nil { + return false, err + } + switch { + case errDFIPv4 == nil && errDFIPv6 == nil: + utils.DefaultLogger.Debugf("Setting DF for IPv4 and IPv6.") + case errDFIPv4 == nil && errDFIPv6 != nil: + utils.DefaultLogger.Debugf("Setting DF for IPv4.") + case errDFIPv4 != nil && errDFIPv6 == nil: + utils.DefaultLogger.Debugf("Setting DF for IPv6.") + case errDFIPv4 != nil && errDFIPv6 != nil: + return false, errors.New("setting DF failed for both IPv4 and IPv6") + } + return true, nil +} + +func isSendMsgSizeErr(err error) bool { + // https://docs.microsoft.com/en-us/windows/win32/winsock/windows-sockets-error-codes-2 + return errors.Is(err, windows.WSAEMSGSIZE) +} + +func isRecvMsgSizeErr(err error) bool { + // https://docs.microsoft.com/en-us/windows/win32/winsock/windows-sockets-error-codes-2 + return errors.Is(err, windows.WSAEMSGSIZE) +} diff --git a/backend/vendor/github.com/enetx/uquic/sys_conn_helper_darwin.go b/backend/vendor/github.com/enetx/uquic/sys_conn_helper_darwin.go new file mode 100644 index 0000000..d761072 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/sys_conn_helper_darwin.go @@ -0,0 +1,36 @@ +//go:build darwin + +package quic + +import ( + "encoding/binary" + "net/netip" + "syscall" + + "golang.org/x/sys/unix" +) + +const ( + msgTypeIPTOS = unix.IP_RECVTOS + ipv4PKTINFO = unix.IP_RECVPKTINFO +) + +const ecnIPv4DataLen = 4 + +// ReadBatch only returns a single packet on OSX, +// see https://godoc.org/golang.org/x/net/ipv4#PacketConn.ReadBatch. +const batchSize = 1 + +func parseIPv4PktInfo(body []byte) (ip netip.Addr, ifIndex uint32, ok bool) { + // struct in_pktinfo { + // unsigned int ipi_ifindex; /* Interface index */ + // struct in_addr ipi_spec_dst; /* Local address */ + // struct in_addr ipi_addr; /* Header Destination address */ + // }; + if len(body) != 12 { + return netip.Addr{}, 0, false + } + return netip.AddrFrom4(*(*[4]byte)(body[8:12])), binary.LittleEndian.Uint32(body), true +} + +func isGSOSupported(syscall.RawConn) bool { return false } diff --git a/backend/vendor/github.com/enetx/uquic/sys_conn_helper_freebsd.go b/backend/vendor/github.com/enetx/uquic/sys_conn_helper_freebsd.go new file mode 100644 index 0000000..a53ca2e --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/sys_conn_helper_freebsd.go @@ -0,0 +1,31 @@ +//go:build freebsd + +package quic + +import ( + "net/netip" + "syscall" + + "golang.org/x/sys/unix" +) + +const ( + msgTypeIPTOS = unix.IP_RECVTOS + ipv4PKTINFO = 0x7 +) + +const ecnIPv4DataLen = 1 + +const batchSize = 8 + +func parseIPv4PktInfo(body []byte) (ip netip.Addr, _ uint32, ok bool) { + // struct in_pktinfo { + // struct in_addr ipi_addr; /* Header Destination address */ + // }; + if len(body) != 4 { + return netip.Addr{}, 0, false + } + return netip.AddrFrom4(*(*[4]byte)(body)), 0, true +} + +func isGSOSupported(syscall.RawConn) bool { return false } diff --git a/backend/vendor/github.com/enetx/uquic/sys_conn_helper_linux.go b/backend/vendor/github.com/enetx/uquic/sys_conn_helper_linux.go new file mode 100644 index 0000000..5fbf34a --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/sys_conn_helper_linux.go @@ -0,0 +1,110 @@ +//go:build linux + +package quic + +import ( + "encoding/binary" + "errors" + "net/netip" + "os" + "strconv" + "syscall" + "unsafe" + + "golang.org/x/sys/unix" +) + +const ( + msgTypeIPTOS = unix.IP_TOS + ipv4PKTINFO = unix.IP_PKTINFO +) + +const ecnIPv4DataLen = 1 + +const batchSize = 8 // needs to smaller than MaxUint8 (otherwise the type of oobConn.readPos has to be changed) + +func forceSetReceiveBuffer(c syscall.RawConn, bytes int) error { + var serr error + if err := c.Control(func(fd uintptr) { + serr = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_RCVBUFFORCE, bytes) + }); err != nil { + return err + } + return serr +} + +func forceSetSendBuffer(c syscall.RawConn, bytes int) error { + var serr error + if err := c.Control(func(fd uintptr) { + serr = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_SNDBUFFORCE, bytes) + }); err != nil { + return err + } + return serr +} + +func parseIPv4PktInfo(body []byte) (ip netip.Addr, ifIndex uint32, ok bool) { + // struct in_pktinfo { + // unsigned int ipi_ifindex; /* Interface index */ + // struct in_addr ipi_spec_dst; /* Local address */ + // struct in_addr ipi_addr; /* Header Destination address */ + // }; + if len(body) != 12 { + return netip.Addr{}, 0, false + } + return netip.AddrFrom4(*(*[4]byte)(body[8:12])), binary.LittleEndian.Uint32(body), true +} + +// isGSOSupported tests if the kernel supports GSO. +// Sending with GSO might still fail later on, if the interface doesn't support it (see isGSOError). +func isGSOSupported(conn syscall.RawConn) bool { + disabled, err := strconv.ParseBool(os.Getenv("QUIC_GO_DISABLE_GSO")) + if err == nil && disabled { + return false + } + var serr error + if err := conn.Control(func(fd uintptr) { + _, serr = unix.GetsockoptInt(int(fd), unix.IPPROTO_UDP, unix.UDP_SEGMENT) + }); err != nil { + return false + } + return serr == nil +} + +func appendUDPSegmentSizeMsg(b []byte, size uint16) []byte { + startLen := len(b) + const dataLen = 2 // payload is a uint16 + b = append(b, make([]byte, unix.CmsgSpace(dataLen))...) + h := (*unix.Cmsghdr)(unsafe.Pointer(&b[startLen])) + h.Level = syscall.IPPROTO_UDP + h.Type = unix.UDP_SEGMENT + h.SetLen(unix.CmsgLen(dataLen)) + + // UnixRights uses the private `data` method, but I *think* this achieves the same goal. + offset := startLen + unix.CmsgSpace(0) + *(*uint16)(unsafe.Pointer(&b[offset])) = size + return b +} + +func isGSOError(err error) bool { + var serr *os.SyscallError + if errors.As(err, &serr) { + // EIO is returned by udp_send_skb() if the device driver does not have tx checksums enabled, + // which is a hard requirement of UDP_SEGMENT. See: + // https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/man7/udp.7?id=806eabd74910447f21005160e90957bde4db0183#n228 + // https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/net/ipv4/udp.c?h=v6.2&id=c9c3395d5e3dcc6daee66c6908354d47bf98cb0c#n942 + return serr.Err == unix.EIO + } + return false +} + +// The first sendmsg call on a new UDP socket sometimes errors on Linux. +// It's not clear why this happens. +// See https://github.com/golang/go/issues/63322. +func isPermissionError(err error) bool { + var serr *os.SyscallError + if errors.As(err, &serr) { + return serr.Syscall == "sendmsg" && serr.Err == unix.EPERM + } + return false +} diff --git a/backend/vendor/github.com/enetx/uquic/sys_conn_helper_nonlinux.go b/backend/vendor/github.com/enetx/uquic/sys_conn_helper_nonlinux.go new file mode 100644 index 0000000..f8d6980 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/sys_conn_helper_nonlinux.go @@ -0,0 +1,10 @@ +//go:build !linux + +package quic + +func forceSetReceiveBuffer(c any, bytes int) error { return nil } +func forceSetSendBuffer(c any, bytes int) error { return nil } + +func appendUDPSegmentSizeMsg([]byte, uint16) []byte { return nil } +func isGSOError(error) bool { return false } +func isPermissionError(err error) bool { return false } diff --git a/backend/vendor/github.com/enetx/uquic/sys_conn_no_oob.go b/backend/vendor/github.com/enetx/uquic/sys_conn_no_oob.go new file mode 100644 index 0000000..2a1f807 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/sys_conn_no_oob.go @@ -0,0 +1,21 @@ +//go:build !darwin && !linux && !freebsd && !windows + +package quic + +import ( + "net" + "net/netip" +) + +func newConn(c net.PacketConn, supportsDF bool) (*basicConn, error) { + return &basicConn{PacketConn: c, supportsDF: supportsDF}, nil +} + +func inspectReadBuffer(any) (int, error) { return 0, nil } +func inspectWriteBuffer(any) (int, error) { return 0, nil } + +type packetInfo struct { + addr netip.Addr +} + +func (i *packetInfo) OOB() []byte { return nil } diff --git a/backend/vendor/github.com/enetx/uquic/sys_conn_oob.go b/backend/vendor/github.com/enetx/uquic/sys_conn_oob.go new file mode 100644 index 0000000..89819bc --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/sys_conn_oob.go @@ -0,0 +1,331 @@ +//go:build darwin || linux || freebsd + +package quic + +import ( + "encoding/binary" + "errors" + "log" + "net" + "net/netip" + "os" + "strconv" + "sync" + "syscall" + "time" + "unsafe" + + "golang.org/x/net/ipv4" + "golang.org/x/net/ipv6" + "golang.org/x/sys/unix" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" +) + +const ( + ecnMask = 0x3 + oobBufferSize = 128 +) + +// Contrary to what the naming suggests, the ipv{4,6}.Message is not dependent on the IP version. +// They're both just aliases for x/net/internal/socket.Message. +// This means we can use this struct to read from a socket that receives both IPv4 and IPv6 messages. +var _ ipv4.Message = ipv6.Message{} + +type batchConn interface { + ReadBatch(ms []ipv4.Message, flags int) (int, error) +} + +func inspectReadBuffer(c syscall.RawConn) (int, error) { + var size int + var serr error + if err := c.Control(func(fd uintptr) { + size, serr = unix.GetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_RCVBUF) + }); err != nil { + return 0, err + } + return size, serr +} + +func inspectWriteBuffer(c syscall.RawConn) (int, error) { + var size int + var serr error + if err := c.Control(func(fd uintptr) { + size, serr = unix.GetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_SNDBUF) + }); err != nil { + return 0, err + } + return size, serr +} + +func isECNDisabled() bool { + disabled, err := strconv.ParseBool(os.Getenv("QUIC_GO_DISABLE_ECN")) + return err == nil && disabled +} + +type oobConn struct { + OOBCapablePacketConn + batchConn batchConn + + readPos uint8 + // Packets received from the kernel, but not yet returned by ReadPacket(). + messages []ipv4.Message + buffers [batchSize]*packetBuffer + + cap connCapabilities +} + +var _ rawConn = &oobConn{} + +func newConn(c OOBCapablePacketConn, supportsDF bool) (*oobConn, error) { + rawConn, err := c.SyscallConn() + if err != nil { + return nil, err + } + needsPacketInfo := false + if udpAddr, ok := c.LocalAddr().(*net.UDPAddr); ok && udpAddr.IP.IsUnspecified() { + needsPacketInfo = true + } + // We don't know if this a IPv4-only, IPv6-only or a IPv4-and-IPv6 connection. + // Try enabling receiving of ECN and packet info for both IP versions. + // We expect at least one of those syscalls to succeed. + var errECNIPv4, errECNIPv6, errPIIPv4, errPIIPv6 error + if err := rawConn.Control(func(fd uintptr) { + errECNIPv4 = unix.SetsockoptInt(int(fd), unix.IPPROTO_IP, unix.IP_RECVTOS, 1) + errECNIPv6 = unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_RECVTCLASS, 1) + + if needsPacketInfo { + errPIIPv4 = unix.SetsockoptInt(int(fd), unix.IPPROTO_IP, ipv4PKTINFO, 1) + errPIIPv6 = unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_RECVPKTINFO, 1) + } + }); err != nil { + return nil, err + } + switch { + case errECNIPv4 == nil && errECNIPv6 == nil: + utils.DefaultLogger.Debugf("Activating reading of ECN bits for IPv4 and IPv6.") + case errECNIPv4 == nil && errECNIPv6 != nil: + utils.DefaultLogger.Debugf("Activating reading of ECN bits for IPv4.") + case errECNIPv4 != nil && errECNIPv6 == nil: + utils.DefaultLogger.Debugf("Activating reading of ECN bits for IPv6.") + case errECNIPv4 != nil && errECNIPv6 != nil: + return nil, errors.New("activating ECN failed for both IPv4 and IPv6") + } + if needsPacketInfo { + switch { + case errPIIPv4 == nil && errPIIPv6 == nil: + utils.DefaultLogger.Debugf("Activating reading of packet info for IPv4 and IPv6.") + case errPIIPv4 == nil && errPIIPv6 != nil: + utils.DefaultLogger.Debugf("Activating reading of packet info bits for IPv4.") + case errPIIPv4 != nil && errPIIPv6 == nil: + utils.DefaultLogger.Debugf("Activating reading of packet info bits for IPv6.") + case errPIIPv4 != nil && errPIIPv6 != nil: + return nil, errors.New("activating packet info failed for both IPv4 and IPv6") + } + } + + // Allows callers to pass in a connection that already satisfies batchConn interface + // to make use of the optimisation. Otherwise, ipv4.NewPacketConn would unwrap the file descriptor + // via SyscallConn(), and read it that way, which might not be what the caller wants. + var bc batchConn + if ibc, ok := c.(batchConn); ok { + bc = ibc + } else { + bc = ipv4.NewPacketConn(c) + } + + msgs := make([]ipv4.Message, batchSize) + for i := range msgs { + // preallocate the [][]byte + msgs[i].Buffers = make([][]byte, 1) + } + oobConn := &oobConn{ + OOBCapablePacketConn: c, + batchConn: bc, + messages: msgs, + readPos: batchSize, + cap: connCapabilities{ + DF: supportsDF, + GSO: isGSOSupported(rawConn), + ECN: !isECNDisabled(), + }, + } + for i := 0; i < batchSize; i++ { + oobConn.messages[i].OOB = make([]byte, oobBufferSize) + } + return oobConn, nil +} + +var invalidCmsgOnceV4, invalidCmsgOnceV6 sync.Once + +func (c *oobConn) ReadPacket() (receivedPacket, error) { + if len(c.messages) == int(c.readPos) { // all messages read. Read the next batch of messages. + c.messages = c.messages[:batchSize] + // replace buffers data buffers up to the packet that has been consumed during the last ReadBatch call + for i := uint8(0); i < c.readPos; i++ { + buffer := getPacketBuffer() + buffer.Data = buffer.Data[:protocol.MaxPacketBufferSize] + c.buffers[i] = buffer + c.messages[i].Buffers[0] = c.buffers[i].Data + } + c.readPos = 0 + + n, err := c.batchConn.ReadBatch(c.messages, 0) + if n == 0 || err != nil { + return receivedPacket{}, err + } + c.messages = c.messages[:n] + } + + msg := c.messages[c.readPos] + buffer := c.buffers[c.readPos] + c.readPos++ + + data := msg.OOB[:msg.NN] + p := receivedPacket{ + remoteAddr: msg.Addr, + rcvTime: time.Now(), + data: msg.Buffers[0][:msg.N], + buffer: buffer, + } + for len(data) > 0 { + hdr, body, remainder, err := unix.ParseOneSocketControlMessage(data) + if err != nil { + return receivedPacket{}, err + } + if hdr.Level == unix.IPPROTO_IP { + switch hdr.Type { + case msgTypeIPTOS: + p.ecn = protocol.ParseECNHeaderBits(body[0] & ecnMask) + case ipv4PKTINFO: + ip, ifIndex, ok := parseIPv4PktInfo(body) + if ok { + p.info.addr = ip + p.info.ifIndex = ifIndex + } else { + invalidCmsgOnceV4.Do(func() { + log.Printf("Received invalid IPv4 packet info control message: %+x. "+ + "This should never occur, please open a new issue and include details about the architecture.", body) + }) + } + } + } + if hdr.Level == unix.IPPROTO_IPV6 { + switch hdr.Type { + case unix.IPV6_TCLASS: + p.ecn = protocol.ParseECNHeaderBits(body[0] & ecnMask) + case unix.IPV6_PKTINFO: + // struct in6_pktinfo { + // struct in6_addr ipi6_addr; /* src/dst IPv6 address */ + // unsigned int ipi6_ifindex; /* send/recv interface index */ + // }; + if len(body) == 20 { + p.info.addr = netip.AddrFrom16(*(*[16]byte)(body[:16])).Unmap() + p.info.ifIndex = binary.LittleEndian.Uint32(body[16:]) + } else { + invalidCmsgOnceV6.Do(func() { + log.Printf("Received invalid IPv6 packet info control message: %+x. "+ + "This should never occur, please open a new issue and include details about the architecture.", body) + }) + } + } + } + data = remainder + } + return p, nil +} + +// WritePacket writes a new packet. +func (c *oobConn) WritePacket(b []byte, addr net.Addr, packetInfoOOB []byte, gsoSize uint16, ecn protocol.ECN) (int, error) { + oob := packetInfoOOB + if gsoSize > 0 { + if !c.capabilities().GSO { + panic("GSO disabled") + } + oob = appendUDPSegmentSizeMsg(oob, gsoSize) + } + if ecn != protocol.ECNUnsupported { + if !c.capabilities().ECN { + panic("tried to send a ECN-marked packet although ECN is disabled") + } + if remoteUDPAddr, ok := addr.(*net.UDPAddr); ok { + if remoteUDPAddr.IP.To4() != nil { + oob = appendIPv4ECNMsg(oob, ecn) + } else { + oob = appendIPv6ECNMsg(oob, ecn) + } + } + } + n, _, err := c.OOBCapablePacketConn.WriteMsgUDP(b, oob, addr.(*net.UDPAddr)) + return n, err +} + +func (c *oobConn) capabilities() connCapabilities { + return c.cap +} + +type packetInfo struct { + addr netip.Addr + ifIndex uint32 +} + +func (info *packetInfo) OOB() []byte { + if info == nil { + return nil + } + if info.addr.Is4() { + ip := info.addr.As4() + // struct in_pktinfo { + // unsigned int ipi_ifindex; /* Interface index */ + // struct in_addr ipi_spec_dst; /* Local address */ + // struct in_addr ipi_addr; /* Header Destination address */ + // }; + cm := ipv4.ControlMessage{ + Src: ip[:], + IfIndex: int(info.ifIndex), + } + return cm.Marshal() + } else if info.addr.Is6() { + ip := info.addr.As16() + // struct in6_pktinfo { + // struct in6_addr ipi6_addr; /* src/dst IPv6 address */ + // unsigned int ipi6_ifindex; /* send/recv interface index */ + // }; + cm := ipv6.ControlMessage{ + Src: ip[:], + IfIndex: int(info.ifIndex), + } + return cm.Marshal() + } + return nil +} + +func appendIPv4ECNMsg(b []byte, val protocol.ECN) []byte { + startLen := len(b) + b = append(b, make([]byte, unix.CmsgSpace(ecnIPv4DataLen))...) + h := (*unix.Cmsghdr)(unsafe.Pointer(&b[startLen])) + h.Level = syscall.IPPROTO_IP + h.Type = unix.IP_TOS + h.SetLen(unix.CmsgLen(ecnIPv4DataLen)) + + // UnixRights uses the private `data` method, but I *think* this achieves the same goal. + offset := startLen + unix.CmsgSpace(0) + b[offset] = val.ToHeaderBits() + return b +} + +func appendIPv6ECNMsg(b []byte, val protocol.ECN) []byte { + startLen := len(b) + const dataLen = 4 + b = append(b, make([]byte, unix.CmsgSpace(dataLen))...) + h := (*unix.Cmsghdr)(unsafe.Pointer(&b[startLen])) + h.Level = syscall.IPPROTO_IPV6 + h.Type = unix.IPV6_TCLASS + h.SetLen(unix.CmsgLen(dataLen)) + + // UnixRights uses the private `data` method, but I *think* this achieves the same goal. + offset := startLen + unix.CmsgSpace(0) + b[offset] = val.ToHeaderBits() + return b +} diff --git a/backend/vendor/github.com/enetx/uquic/sys_conn_windows.go b/backend/vendor/github.com/enetx/uquic/sys_conn_windows.go new file mode 100644 index 0000000..b9c1cbc --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/sys_conn_windows.go @@ -0,0 +1,42 @@ +//go:build windows + +package quic + +import ( + "net/netip" + "syscall" + + "golang.org/x/sys/windows" +) + +func newConn(c OOBCapablePacketConn, supportsDF bool) (*basicConn, error) { + return &basicConn{PacketConn: c, supportsDF: supportsDF}, nil +} + +func inspectReadBuffer(c syscall.RawConn) (int, error) { + var size int + var serr error + if err := c.Control(func(fd uintptr) { + size, serr = windows.GetsockoptInt(windows.Handle(fd), windows.SOL_SOCKET, windows.SO_RCVBUF) + }); err != nil { + return 0, err + } + return size, serr +} + +func inspectWriteBuffer(c syscall.RawConn) (int, error) { + var size int + var serr error + if err := c.Control(func(fd uintptr) { + size, serr = windows.GetsockoptInt(windows.Handle(fd), windows.SOL_SOCKET, windows.SO_SNDBUF) + }); err != nil { + return 0, err + } + return size, serr +} + +type packetInfo struct { + addr netip.Addr +} + +func (i *packetInfo) OOB() []byte { return nil } diff --git a/backend/vendor/github.com/enetx/uquic/token_store.go b/backend/vendor/github.com/enetx/uquic/token_store.go new file mode 100644 index 0000000..031848b --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/token_store.go @@ -0,0 +1,116 @@ +package quic + +import ( + "sync" + + list "github.com/enetx/uquic/internal/utils/linkedlist" +) + +type singleOriginTokenStore struct { + tokens []*ClientToken + len int + p int +} + +func newSingleOriginTokenStore(size int) *singleOriginTokenStore { + return &singleOriginTokenStore{tokens: make([]*ClientToken, size)} +} + +func (s *singleOriginTokenStore) Add(token *ClientToken) { + s.tokens[s.p] = token + s.p = s.index(s.p + 1) + s.len = min(s.len+1, len(s.tokens)) +} + +func (s *singleOriginTokenStore) Pop() *ClientToken { + s.p = s.index(s.p - 1) + token := s.tokens[s.p] + s.tokens[s.p] = nil + s.len = max(s.len-1, 0) + return token +} + +func (s *singleOriginTokenStore) Len() int { + return s.len +} + +func (s *singleOriginTokenStore) index(i int) int { + mod := len(s.tokens) + return (i + mod) % mod +} + +type lruTokenStoreEntry struct { + key string + cache *singleOriginTokenStore +} + +type lruTokenStore struct { + mutex sync.Mutex + + m map[string]*list.Element[*lruTokenStoreEntry] + q *list.List[*lruTokenStoreEntry] + capacity int + singleOriginSize int +} + +var _ TokenStore = &lruTokenStore{} + +// NewLRUTokenStore creates a new LRU cache for tokens received by the client. +// maxOrigins specifies how many origins this cache is saving tokens for. +// tokensPerOrigin specifies the maximum number of tokens per origin. +func NewLRUTokenStore(maxOrigins, tokensPerOrigin int) TokenStore { + return &lruTokenStore{ + m: make(map[string]*list.Element[*lruTokenStoreEntry]), + q: list.New[*lruTokenStoreEntry](), + capacity: maxOrigins, + singleOriginSize: tokensPerOrigin, + } +} + +func (s *lruTokenStore) Put(key string, token *ClientToken) { + s.mutex.Lock() + defer s.mutex.Unlock() + + if el, ok := s.m[key]; ok { + entry := el.Value + entry.cache.Add(token) + s.q.MoveToFront(el) + return + } + + if s.q.Len() < s.capacity { + entry := &lruTokenStoreEntry{ + key: key, + cache: newSingleOriginTokenStore(s.singleOriginSize), + } + entry.cache.Add(token) + s.m[key] = s.q.PushFront(entry) + return + } + + elem := s.q.Back() + entry := elem.Value + delete(s.m, entry.key) + entry.key = key + entry.cache = newSingleOriginTokenStore(s.singleOriginSize) + entry.cache.Add(token) + s.q.MoveToFront(elem) + s.m[key] = elem +} + +func (s *lruTokenStore) Pop(key string) *ClientToken { + s.mutex.Lock() + defer s.mutex.Unlock() + + var token *ClientToken + if el, ok := s.m[key]; ok { + s.q.MoveToFront(el) + cache := el.Value.cache + token = cache.Pop() + if cache.Len() == 0 { + s.q.Remove(el) + delete(s.m, key) + } + } + return token +} diff --git a/backend/vendor/github.com/enetx/uquic/tools.go b/backend/vendor/github.com/enetx/uquic/tools.go new file mode 100644 index 0000000..d00ce74 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/tools.go @@ -0,0 +1,8 @@ +//go:build tools + +package quic + +import ( + _ "github.com/onsi/ginkgo/v2/ginkgo" + _ "go.uber.org/mock/mockgen" +) diff --git a/backend/vendor/github.com/enetx/uquic/transport.go b/backend/vendor/github.com/enetx/uquic/transport.go new file mode 100644 index 0000000..2c2379f --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/transport.go @@ -0,0 +1,544 @@ +package quic + +import ( + "context" + "crypto/rand" + "errors" + "net" + "sync" + "sync/atomic" + "time" + + tls "github.com/enetx/utls" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/internal/wire" + "github.com/enetx/uquic/logging" +) + +var errListenerAlreadySet = errors.New("listener already set") + +// The Transport is the central point to manage incoming and outgoing QUIC connections. +// QUIC demultiplexes connections based on their QUIC Connection IDs, not based on the 4-tuple. +// This means that a single UDP socket can be used for listening for incoming connections, as well as +// for dialing an arbitrary number of outgoing connections. +// A Transport handles a single net.PacketConn, and offers a range of configuration options +// compared to the simple helper functions like Listen and Dial that this package provides. +type Transport struct { + // A single net.PacketConn can only be handled by one Transport. + // Bad things will happen if passed to multiple Transports. + // + // A number of optimizations will be enabled if the connections implements the OOBCapablePacketConn interface, + // as a *net.UDPConn does. + // 1. It enables the Don't Fragment (DF) bit on the IP header. + // This is required to run DPLPMTUD (Path MTU Discovery, RFC 8899). + // 2. It enables reading of the ECN bits from the IP header. + // This allows the remote node to speed up its loss detection and recovery. + // 3. It uses batched syscalls (recvmmsg) to more efficiently receive packets from the socket. + // 4. It uses Generic Segmentation Offload (GSO) to efficiently send batches of packets (on Linux). + // + // After passing the connection to the Transport, it's invalid to call ReadFrom or WriteTo on the connection. + Conn net.PacketConn + + // The length of the connection ID in bytes. + // It can be any value between 1 and 20. + // Due to the increased risk of collisions, it is not recommended to use connection IDs shorter than 4 bytes. + // If unset, a 4 byte connection ID will be used. + ConnectionIDLength int + + // Use for generating new connection IDs. + // This allows the application to control of the connection IDs used, + // which allows routing / load balancing based on connection IDs. + // All Connection IDs returned by the ConnectionIDGenerator MUST + // have the same length. + ConnectionIDGenerator ConnectionIDGenerator + + // The StatelessResetKey is used to generate stateless reset tokens. + // If no key is configured, sending of stateless resets is disabled. + // It is highly recommended to configure a stateless reset key, as stateless resets + // allow the peer to quickly recover from crashes and reboots of this node. + // See section 10.3 of RFC 9000 for details. + StatelessResetKey *StatelessResetKey + + // The TokenGeneratorKey is used to encrypt session resumption tokens. + // If no key is configured, a random key will be generated. + // If multiple servers are authoritative for the same domain, they should use the same key, + // see section 8.1.3 of RFC 9000 for details. + TokenGeneratorKey *TokenGeneratorKey + + // MaxTokenAge is the maximum age of the resumption token presented during the handshake. + // These tokens allow skipping address resumption when resuming a QUIC connection, + // and are especially useful when using 0-RTT. + // If not set, it defaults to 24 hours. + // See section 8.1.3 of RFC 9000 for details. + MaxTokenAge time.Duration + + // DisableVersionNegotiationPackets disables the sending of Version Negotiation packets. + // This can be useful if version information is exchanged out-of-band. + // It has no effect for clients. + DisableVersionNegotiationPackets bool + + // VerifySourceAddress decides if a connection attempt originating from unvalidated source + // addresses first needs to go through source address validation using QUIC's Retry mechanism, + // as described in RFC 9000 section 8.1.2. + // Note that the address passed to this callback is unvalidated, and might be spoofed in case + // of an attack. + // Validating the source address adds one additional network roundtrip to the handshake, + // and should therefore only be used if a suspiciously high number of incoming connection is recorded. + // For most use cases, wrapping the Allow function of a rate.Limiter will be a reasonable + // implementation of this callback (negating its return value). + VerifySourceAddress func(net.Addr) bool + + // A Tracer traces events that don't belong to a single QUIC connection. + // Tracer.Close is called when the transport is closed. + Tracer *logging.Tracer + + handlerMap packetHandlerManager + + mutex sync.Mutex + initOnce sync.Once + initErr error + + // Set in init. + // If no ConnectionIDGenerator is set, this is the ConnectionIDLength. + connIDLen int + // Set in init. + // If no ConnectionIDGenerator is set, this is set to a default. + connIDGenerator ConnectionIDGenerator + + server *baseServer + + conn rawConn + + closeQueue chan closePacket + statelessResetQueue chan receivedPacket + + listening chan struct{} // is closed when listen returns + closed bool + createdConn bool + isSingleUse bool // was created for a single server or client, i.e. by calling quic.Listen or quic.Dial + + readingNonQUICPackets atomic.Bool + nonQUICPackets chan receivedPacket + + logger utils.Logger +} + +// Listen starts listening for incoming QUIC connections. +// There can only be a single listener on any net.PacketConn. +// Listen may only be called again after the current Listener was closed. +func (t *Transport) Listen(tlsConf *tls.Config, conf *Config) (*Listener, error) { + s, err := t.createServer(tlsConf, conf, false) + if err != nil { + return nil, err + } + return &Listener{baseServer: s}, nil +} + +// ListenEarly starts listening for incoming QUIC connections. +// There can only be a single listener on any net.PacketConn. +// Listen may only be called again after the current Listener was closed. +func (t *Transport) ListenEarly(tlsConf *tls.Config, conf *Config) (*EarlyListener, error) { + s, err := t.createServer(tlsConf, conf, true) + if err != nil { + return nil, err + } + return &EarlyListener{baseServer: s}, nil +} + +func (t *Transport) createServer(tlsConf *tls.Config, conf *Config, allow0RTT bool) (*baseServer, error) { + if tlsConf == nil { + return nil, errors.New("quic: tls.Config not set") + } + if err := validateConfig(conf); err != nil { + return nil, err + } + + t.mutex.Lock() + defer t.mutex.Unlock() + + if t.server != nil { + return nil, errListenerAlreadySet + } + conf = populateConfig(conf) + if err := t.init(false); err != nil { + return nil, err + } + s := newServer( + t.conn, + t.handlerMap, + t.connIDGenerator, + tlsConf, + conf, + t.Tracer, + t.closeServer, + *t.TokenGeneratorKey, + t.MaxTokenAge, + t.VerifySourceAddress, + t.DisableVersionNegotiationPackets, + allow0RTT, + ) + t.server = s + return s, nil +} + +// Dial dials a new connection to a remote host (not using 0-RTT). +func (t *Transport) Dial(ctx context.Context, addr net.Addr, tlsConf *tls.Config, conf *Config) (Connection, error) { + return t.dial(ctx, addr, "", tlsConf, conf, false) +} + +// DialEarly dials a new connection, attempting to use 0-RTT if possible. +func (t *Transport) DialEarly(ctx context.Context, addr net.Addr, tlsConf *tls.Config, conf *Config) (EarlyConnection, error) { + return t.dial(ctx, addr, "", tlsConf, conf, true) +} + +func (t *Transport) dial(ctx context.Context, addr net.Addr, host string, tlsConf *tls.Config, conf *Config, use0RTT bool) (EarlyConnection, error) { + if err := validateConfig(conf); err != nil { + return nil, err + } + conf = populateConfig(conf) + + if err := t.init(t.isSingleUse); err != nil { + return nil, err + } + var onClose func() + if t.isSingleUse { + onClose = func() { t.Close() } + } + tlsConf = tlsConf.Clone() + setTLSConfigServerName(tlsConf, addr, host) + return dial(ctx, newSendConn(t.conn, addr, packetInfo{}, utils.DefaultLogger), t.connIDGenerator, t.handlerMap, tlsConf, conf, onClose, use0RTT) +} + +func (t *Transport) init(allowZeroLengthConnIDs bool) error { + t.initOnce.Do(func() { + var conn rawConn + if c, ok := t.Conn.(rawConn); ok { + conn = c + } else { + var err error + conn, err = wrapConn(t.Conn) + if err != nil { + t.initErr = err + return + } + } + + t.logger = utils.DefaultLogger // TODO: make this configurable + t.conn = conn + t.handlerMap = newPacketHandlerMap(t.StatelessResetKey, t.enqueueClosePacket, t.logger) + t.listening = make(chan struct{}) + + t.closeQueue = make(chan closePacket, 4) + t.statelessResetQueue = make(chan receivedPacket, 4) + if t.TokenGeneratorKey == nil { + var key TokenGeneratorKey + if _, err := rand.Read(key[:]); err != nil { + t.initErr = err + return + } + t.TokenGeneratorKey = &key + } + + if t.ConnectionIDGenerator != nil { + t.connIDGenerator = t.ConnectionIDGenerator + t.connIDLen = t.ConnectionIDGenerator.ConnectionIDLen() + } else { + connIDLen := t.ConnectionIDLength + if t.ConnectionIDLength == 0 && !allowZeroLengthConnIDs { + connIDLen = protocol.DefaultConnectionIDLength + } + t.connIDLen = connIDLen + t.connIDGenerator = &protocol.DefaultConnectionIDGenerator{ConnLen: t.connIDLen} + } + + getMultiplexer().AddConn(t.Conn) + go t.listen(conn) + go t.runSendQueue() + }) + return t.initErr +} + +// WriteTo sends a packet on the underlying connection. +func (t *Transport) WriteTo(b []byte, addr net.Addr) (int, error) { + if err := t.init(false); err != nil { + return 0, err + } + return t.conn.WritePacket(b, addr, nil, 0, protocol.ECNUnsupported) +} + +func (t *Transport) enqueueClosePacket(p closePacket) { + select { + case t.closeQueue <- p: + default: + // Oops, we're backlogged. + // Just drop the packet, sending CONNECTION_CLOSE copies is best effort anyway. + } +} + +func (t *Transport) runSendQueue() { + for { + select { + case <-t.listening: + return + case p := <-t.closeQueue: + t.conn.WritePacket(p.payload, p.addr, p.info.OOB(), 0, protocol.ECNUnsupported) + case p := <-t.statelessResetQueue: + t.sendStatelessReset(p) + } + } +} + +// Close closes the underlying connection. +// If any listener was started, it will be closed as well. +// It is invalid to start new listeners or connections after that. +func (t *Transport) Close() error { + t.close(errors.New("closing")) + if t.createdConn { + if err := t.Conn.Close(); err != nil { + return err + } + } else if t.conn != nil { + t.conn.SetReadDeadline(time.Now()) + defer func() { t.conn.SetReadDeadline(time.Time{}) }() + } + if t.listening != nil { + <-t.listening // wait until listening returns + } + return nil +} + +func (t *Transport) closeServer() { + t.mutex.Lock() + t.server = nil + if t.isSingleUse { + t.closed = true + } + t.mutex.Unlock() + if t.createdConn { + t.Conn.Close() + } + if t.isSingleUse { + t.conn.SetReadDeadline(time.Now()) + defer func() { t.conn.SetReadDeadline(time.Time{}) }() + <-t.listening // wait until listening returns + } +} + +func (t *Transport) close(e error) { + t.mutex.Lock() + defer t.mutex.Unlock() + if t.closed { + return + } + + if t.handlerMap != nil { + t.handlerMap.Close(e) + } + if t.server != nil { + t.server.close(e, false) + } + if t.Tracer != nil && t.Tracer.Close != nil { + t.Tracer.Close() + } + t.closed = true +} + +// only print warnings about the UDP receive buffer size once +var setBufferWarningOnce sync.Once + +func (t *Transport) listen(conn rawConn) { + defer close(t.listening) + defer getMultiplexer().RemoveConn(t.Conn) + + for { + p, err := conn.ReadPacket() + //nolint:staticcheck // SA1019 ignore this! + // TODO: This code is used to ignore wsa errors on Windows. + // Since net.Error.Temporary is deprecated as of Go 1.18, we should find a better solution. + // See https://github.com/enetx/uquic/issues/1737 for details. + if nerr, ok := err.(net.Error); ok && nerr.Temporary() { + t.mutex.Lock() + closed := t.closed + t.mutex.Unlock() + if closed { + return + } + t.logger.Debugf("Temporary error reading from conn: %w", err) + continue + } + if err != nil { + // Windows returns an error when receiving a UDP datagram that doesn't fit into the provided buffer. + if isRecvMsgSizeErr(err) { + continue + } + t.close(err) + return + } + t.handlePacket(p) + } +} + +func (t *Transport) handlePacket(p receivedPacket) { + if len(p.data) == 0 { + return + } + if !wire.IsPotentialQUICPacket(p.data[0]) && !wire.IsLongHeaderPacket(p.data[0]) { + t.handleNonQUICPacket(p) + return + } + connID, err := wire.ParseConnectionID(p.data, t.connIDLen) + if err != nil { + t.logger.Debugf("error parsing connection ID on packet from %s: %s", p.remoteAddr, err) + if t.Tracer != nil && t.Tracer.DroppedPacket != nil { + t.Tracer.DroppedPacket(p.remoteAddr, logging.PacketTypeNotDetermined, p.Size(), logging.PacketDropHeaderParseError) + } + p.buffer.MaybeRelease() + return + } + + // If there's a connection associated with the connection ID, pass the packet there. + if handler, ok := t.handlerMap.Get(connID); ok { + handler.handlePacket(p) + return + } + // RFC 9000 section 10.3.1 requires that the stateless reset detection logic is run for both + // packets that cannot be associated with any connections, and for packets that can't be decrypted. + // We deviate from the RFC and ignore the latter: If a packet's connection ID is associated with an + // existing connection, it is dropped there if if it can't be decrypted. + // Stateless resets use random connection IDs, and at reasonable connection ID lengths collisions are + // exceedingly rare. In the unlikely event that a stateless reset is misrouted to an existing connection, + // it is to be expected that the next stateless reset will be correctly detected. + if isStatelessReset := t.maybeHandleStatelessReset(p.data); isStatelessReset { + return + } + if !wire.IsLongHeaderPacket(p.data[0]) { + t.maybeSendStatelessReset(p) + return + } + + t.mutex.Lock() + defer t.mutex.Unlock() + if t.server == nil { // no server set + t.logger.Debugf("received a packet with an unexpected connection ID %s", connID) + return + } + t.server.handlePacket(p) +} + +func (t *Transport) maybeSendStatelessReset(p receivedPacket) { + if t.StatelessResetKey == nil { + p.buffer.Release() + return + } + + // Don't send a stateless reset in response to very small packets. + // This includes packets that could be stateless resets. + if len(p.data) <= protocol.MinStatelessResetSize { + p.buffer.Release() + return + } + + select { + case t.statelessResetQueue <- p: + default: + // it's fine to not send a stateless reset when we're busy + p.buffer.Release() + } +} + +func (t *Transport) sendStatelessReset(p receivedPacket) { + defer p.buffer.Release() + + connID, err := wire.ParseConnectionID(p.data, t.connIDLen) + if err != nil { + t.logger.Errorf("error parsing connection ID on packet from %s: %s", p.remoteAddr, err) + return + } + token := t.handlerMap.GetStatelessResetToken(connID) + t.logger.Debugf("Sending stateless reset to %s (connection ID: %s). Token: %#x", p.remoteAddr, connID, token) + data := make([]byte, protocol.MinStatelessResetSize-16, protocol.MinStatelessResetSize) + rand.Read(data) + data[0] = (data[0] & 0x7f) | 0x40 + data = append(data, token[:]...) + if _, err := t.conn.WritePacket(data, p.remoteAddr, p.info.OOB(), 0, protocol.ECNUnsupported); err != nil { + t.logger.Debugf("Error sending Stateless Reset to %s: %s", p.remoteAddr, err) + } +} + +func (t *Transport) maybeHandleStatelessReset(data []byte) bool { + // stateless resets are always short header packets + if wire.IsLongHeaderPacket(data[0]) { + return false + } + if len(data) < 17 /* type byte + 16 bytes for the reset token */ { + return false + } + + token := *(*protocol.StatelessResetToken)(data[len(data)-16:]) + if conn, ok := t.handlerMap.GetByResetToken(token); ok { + t.logger.Debugf("Received a stateless reset with token %#x. Closing connection.", token) + go conn.destroy(&StatelessResetError{Token: token}) + return true + } + return false +} + +func (t *Transport) handleNonQUICPacket(p receivedPacket) { + // Strictly speaking, this is racy, + // but we only care about receiving packets at some point after ReadNonQUICPacket has been called. + if !t.readingNonQUICPackets.Load() { + return + } + select { + case t.nonQUICPackets <- p: + default: + if t.Tracer != nil && t.Tracer.DroppedPacket != nil { + t.Tracer.DroppedPacket(p.remoteAddr, logging.PacketTypeNotDetermined, p.Size(), logging.PacketDropDOSPrevention) + } + } +} + +const maxQueuedNonQUICPackets = 32 + +// ReadNonQUICPacket reads non-QUIC packets received on the underlying connection. +// The detection logic is very simple: Any packet that has the first and second bit of the packet set to 0. +// Note that this is stricter than the detection logic defined in RFC 9443. +func (t *Transport) ReadNonQUICPacket(ctx context.Context, b []byte) (int, net.Addr, error) { + if err := t.init(false); err != nil { + return 0, nil, err + } + if !t.readingNonQUICPackets.Load() { + t.nonQUICPackets = make(chan receivedPacket, maxQueuedNonQUICPackets) + t.readingNonQUICPackets.Store(true) + } + select { + case <-ctx.Done(): + return 0, nil, ctx.Err() + case p := <-t.nonQUICPackets: + n := copy(b, p.data) + return n, p.remoteAddr, nil + case <-t.listening: + return 0, nil, errors.New("closed") + } +} + +func setTLSConfigServerName(tlsConf *tls.Config, addr net.Addr, host string) { + // If no ServerName is set, infer the ServerName from the host we're connecting to. + if tlsConf.ServerName != "" { + return + } + if host == "" { + if udpAddr, ok := addr.(*net.UDPAddr); ok { + tlsConf.ServerName = udpAddr.IP.String() + return + } + } + h, _, err := net.SplitHostPort(host) + if err != nil { // This happens if the host doesn't contain a port number. + tlsConf.ServerName = host + return + } + tlsConf.ServerName = h +} diff --git a/backend/vendor/github.com/enetx/uquic/u_client.go b/backend/vendor/github.com/enetx/uquic/u_client.go new file mode 100644 index 0000000..263c4c5 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/u_client.go @@ -0,0 +1,150 @@ +package quic + +import ( + "context" + "errors" + + "github.com/enetx/uquic/internal/protocol" + tls "github.com/enetx/utls" +) + +type uClient struct { + *client + uSpec *QUICSpec // [UQUIC] +} + +func udial( + ctx context.Context, + conn sendConn, + connIDGenerator ConnectionIDGenerator, + packetHandlers packetHandlerManager, + tlsConf *tls.Config, + config *Config, + onClose func(), + use0RTT bool, + uSpec *QUICSpec, // [UQUIC] +) (quicConn, error) { + c, err := newClient(conn, connIDGenerator, config, tlsConf, onClose, use0RTT) + if err != nil { + return nil, err + } + c.packetHandlers = packetHandlers + + // [UQUIC] + if uSpec.InitialPacketSpec.DestConnIDLength > 0 { + destConnID, err := generateConnectionIDForInitialWithLength(uSpec.InitialPacketSpec.DestConnIDLength) + if err != nil { + return nil, err + } + c.destConnID = destConnID + } + c.initialPacketNumber = protocol.PacketNumber(uSpec.InitialPacketSpec.InitPacketNumber) + // [/UQUIC] + + c.tracingID = nextConnTracingID() + if c.config.Tracer != nil { + c.tracer = c.config.Tracer(context.WithValue(ctx, ConnectionTracingKey, c.tracingID), protocol.PerspectiveClient, c.destConnID) + } + if c.tracer != nil { + c.tracer.StartedConnection(c.sendConn.LocalAddr(), c.sendConn.RemoteAddr(), c.srcConnID, c.destConnID) + } + + // [UQUIC] + uc := &uClient{ + client: c, + uSpec: uSpec, + } + // [/UQUIC] + + if err := uc.dial(ctx); err != nil { + return nil, err + } + return uc.conn, nil +} + +func (c *uClient) dial(ctx context.Context) error { + c.logger.Infof("Starting new uQUIC connection to %s (%s -> %s), source connection ID %s, destination connection ID %s, version %s", c.tlsConf.ServerName, c.sendConn.LocalAddr(), c.sendConn.RemoteAddr(), c.srcConnID, c.destConnID, c.version) + + // [UQUIC] + if c.uSpec.ClientHelloSpec == nil { + c.conn = newClientConnection( + c.sendConn, + c.packetHandlers, + c.destConnID, + c.srcConnID, + c.connIDGenerator, + c.config, + c.tlsConf, + c.initialPacketNumber, + c.use0RTT, + c.hasNegotiatedVersion, + c.tracer, + c.tracingID, + c.logger, + c.version, + ) + } else { + // [UQUIC]: use custom version of the connection + c.conn = newUClientConnection( + c.sendConn, + c.packetHandlers, + c.destConnID, + c.srcConnID, + c.connIDGenerator, + c.config, + c.tlsConf, + c.initialPacketNumber, + c.use0RTT, + c.hasNegotiatedVersion, + c.tracer, + c.tracingID, + c.logger, + c.version, + c.uSpec, + ) + } + // [/UQUIC] + + c.packetHandlers.Add(c.srcConnID, c.conn) + + errorChan := make(chan error, 1) + recreateChan := make(chan errCloseForRecreating) + go func() { + err := c.conn.run() + var recreateErr *errCloseForRecreating + if errors.As(err, &recreateErr) { + recreateChan <- *recreateErr + return + } + if c.onClose != nil { + c.onClose() + } + errorChan <- err // returns as soon as the connection is closed + }() + + // only set when we're using 0-RTT + // Otherwise, earlyConnChan will be nil. Receiving from a nil chan blocks forever. + var earlyConnChan <-chan struct{} + if c.use0RTT { + earlyConnChan = c.conn.earlyConnReady() + } + + select { + case <-ctx.Done(): + c.conn.destroy(nil) + return context.Cause(ctx) + case err := <-errorChan: + return err + case recreateErr := <-recreateChan: + c.initialPacketNumber = recreateErr.nextPacketNumber + c.version = recreateErr.nextVersion + c.hasNegotiatedVersion = true + return c.dial(ctx) + case <-earlyConnChan: + // ready to send 0-RTT data + return nil + case <-c.conn.HandshakeComplete(): + // handshake successfully completed + return nil + } +} diff --git a/backend/vendor/github.com/enetx/uquic/u_conn_id_manager.go b/backend/vendor/github.com/enetx/uquic/u_conn_id_manager.go new file mode 100644 index 0000000..9a9d1e9 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/u_conn_id_manager.go @@ -0,0 +1,6 @@ +package quic + +// [UQUIC] +func (h *connIDManager) SetConnectionIDLimit(limit uint64) { + h.connectionIDLimit = limit +} diff --git a/backend/vendor/github.com/enetx/uquic/u_connection.go b/backend/vendor/github.com/enetx/uquic/u_connection.go new file mode 100644 index 0000000..928c5f2 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/u_connection.go @@ -0,0 +1,166 @@ +package quic + +import ( + "context" + + "github.com/enetx/uquic/internal/ackhandler" + "github.com/enetx/uquic/internal/handshake" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + "github.com/enetx/uquic/internal/wire" + "github.com/enetx/uquic/logging" + tls "github.com/enetx/utls" +) + +// [UQUIC] +var newUClientConnection = func( + conn sendConn, + runner connRunner, + destConnID protocol.ConnectionID, + srcConnID protocol.ConnectionID, + connIDGenerator ConnectionIDGenerator, + conf *Config, + tlsConf *tls.Config, + initialPacketNumber protocol.PacketNumber, + enable0RTT bool, + hasNegotiatedVersion bool, + tracer *logging.ConnectionTracer, + tracingID uint64, + logger utils.Logger, + v protocol.Version, + uSpec *QUICSpec, // [UQUIC] +) quicConn { + s := &connection{ + conn: conn, + config: conf, + origDestConnID: destConnID, + handshakeDestConnID: destConnID, + srcConnIDLen: srcConnID.Len(), + perspective: protocol.PerspectiveClient, + logID: destConnID.String(), + logger: logger, + tracer: tracer, + versionNegotiated: hasNegotiatedVersion, + version: v, + } + s.connIDManager = newConnIDManager( + destConnID, + func(token protocol.StatelessResetToken) { runner.AddResetToken(token, s) }, + runner.RemoveResetToken, + s.queueControlFrame, + ) + + s.connIDGenerator = newConnIDGenerator( + srcConnID, + nil, + func(connID protocol.ConnectionID) { runner.Add(connID, s) }, + runner.GetStatelessResetToken, + runner.Remove, + runner.Retire, + runner.ReplaceWithClosed, + s.queueControlFrame, + connIDGenerator, + ) + s.preSetup() + s.ctx, s.ctxCancel = context.WithCancelCause(context.WithValue(context.Background(), ConnectionTracingKey, tracingID)) + s.sentPacketHandler, s.receivedPacketHandler = ackhandler.NewUAckHandler( + initialPacketNumber, + getMaxPacketSize(s.conn.RemoteAddr()), + s.rttStats, + false, // has no effect + s.conn.capabilities().ECN, + s.perspective, + s.tracer, + s.logger, + ) + // [UQUIC] + if uSpec.InitialPacketSpec.InitPacketNumberLength != 0 { + ackhandler.SetInitialPacketNumberLength(s.sentPacketHandler, uSpec.InitialPacketSpec.InitPacketNumberLength) + } + + s.mtuDiscoverer = newMTUDiscoverer(s.rttStats, getMaxPacketSize(s.conn.RemoteAddr()), s.sentPacketHandler.SetMaxDatagramSize) + oneRTTStream := newCryptoStream() + + var params *wire.TransportParameters + + if uSpec.ClientHelloSpec != nil { + // iterate over all Extensions to set the TransportParameters + var tpSet bool + FOR_EACH_TLS_EXTENSION: + for _, ext := range uSpec.ClientHelloSpec.Extensions { + switch ext := ext.(type) { + case *tls.QUICTransportParametersExtension: + params = &wire.TransportParameters{ + InitialSourceConnectionID: srcConnID, + } + params.PopulateFromUQUIC(ext.TransportParameters) + s.connIDManager.SetConnectionIDLimit(params.ActiveConnectionIDLimit) + tpSet = true + break FOR_EACH_TLS_EXTENSION + default: + continue FOR_EACH_TLS_EXTENSION + } + } + if !tpSet { + panic("applied ClientHelloSpec must contain a QUICTransportParametersExtension to proceed") + } + } else { + // use default TransportParameters + params = &wire.TransportParameters{ + InitialMaxStreamDataBidiRemote: protocol.ByteCount(s.config.InitialStreamReceiveWindow), + InitialMaxStreamDataBidiLocal: protocol.ByteCount(s.config.InitialStreamReceiveWindow), + InitialMaxStreamDataUni: protocol.ByteCount(s.config.InitialStreamReceiveWindow), + InitialMaxData: protocol.ByteCount(s.config.InitialConnectionReceiveWindow), + MaxIdleTimeout: s.config.MaxIdleTimeout, + MaxBidiStreamNum: protocol.StreamNum(s.config.MaxIncomingStreams), + MaxUniStreamNum: protocol.StreamNum(s.config.MaxIncomingUniStreams), + MaxAckDelay: protocol.MaxAckDelayInclGranularity, + AckDelayExponent: protocol.AckDelayExponent, + DisableActiveMigration: true, + // For interoperability with quic-go versions before May 2023, this value must be set to a value + // different from protocol.DefaultActiveConnectionIDLimit. + // If set to the default value, it will be omitted from the transport parameters, which will make + // old quic-go versions interpret it as 0, instead of the default value of 2. + // See https://github.com/enetx/uquic/pull/3806. + ActiveConnectionIDLimit: protocol.MaxActiveConnectionIDs, + InitialSourceConnectionID: srcConnID, + } + if s.config.EnableDatagrams { + params.MaxDatagramFrameSize = wire.MaxDatagramSize + } else { + params.MaxDatagramFrameSize = protocol.InvalidByteCount + } + } + if s.tracer != nil && s.tracer.SentTransportParameters != nil { + s.tracer.SentTransportParameters(params) + } + cs := handshake.NewUCryptoSetupClient( + destConnID, + params, + tlsConf, + enable0RTT, + s.rttStats, + tracer, + logger, + s.version, + uSpec.ClientHelloSpec, + ) + s.cryptoStreamHandler = cs + s.cryptoStreamManager = newCryptoStreamManager(cs, s.initialStream, s.handshakeStream, oneRTTStream) + s.unpacker = newPacketUnpacker(cs, s.srcConnIDLen) + s.packer = newUPacketPacker( + newPacketPacker(srcConnID, s.connIDManager.Get, s.initialStream, s.handshakeStream, s.sentPacketHandler, s.retransmissionQueue, cs, s.framer, s.receivedPacketHandler, s.datagramQueue, s.perspective), + uSpec, + ) + if len(tlsConf.ServerName) > 0 { + s.tokenStoreKey = tlsConf.ServerName + } else { + s.tokenStoreKey = conn.RemoteAddr().String() + } + if s.config.TokenStore != nil { + if token := s.config.TokenStore.Pop(s.tokenStoreKey); token != nil { + s.packer.SetToken(token.data) + } + } + return s +} diff --git a/backend/vendor/github.com/enetx/uquic/u_initial_packet_spec.go b/backend/vendor/github.com/enetx/uquic/u_initial_packet_spec.go new file mode 100644 index 0000000..5b75a40 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/u_initial_packet_spec.go @@ -0,0 +1,75 @@ +package quic + +import ( + "crypto/rand" +) + +type InitialPacketSpec struct { + // SrcConnIDLength specifies how many bytes should the SrcConnID be + SrcConnIDLength int + + // DestConnIDLength specifies how many bytes should the DestConnID be + DestConnIDLength int + + // InitPacketNumberLength specifies how many bytes should the InitPacketNumber + // be interpreted as. It is usually 1 or 2 bytes. If unset, UQUIC will use the + // default algorithm to compute the length which is at least 2 bytes. + InitPacketNumberLength PacketNumberLen + + // InitPacketNumber is the packet number of the first Initial packet. Following + // Initial packets, if any, will increment the Packet Number accordingly. + InitPacketNumber uint64 // [UQUIC] + + // TokenStore is used to store and retrieve tokens. If set, will override the + // one set in the Config. + TokenStore TokenStore + + // If ClientTokenLength is set when TokenStore is not set, a dummy TokenStore + // will be created to randomly generate tokens of the specified length for + // Pop() calls with any key and silently drop any Put() calls. + // + // However, the tokens will not be stored anywhere and are expected to be + // invalid since not assigned by the server. + ClientTokenLength int + + // FrameBuilder specifies how the frames should be encapsulated for the first Initial + // packet. + // + // If nil, there will be only one single Crypto frame in the first Initial packet. + FrameBuilder QUICFrameBuilder +} + +func (ps *InitialPacketSpec) UpdateConfig(conf *Config) { + conf.TokenStore = ps.getTokenStore() +} + +func (ps *InitialPacketSpec) getTokenStore() TokenStore { + if ps.TokenStore != nil { + return ps.TokenStore + } + + if ps.ClientTokenLength > 0 { + return &dummyTokenStore{ + tokenLength: ps.ClientTokenLength, + } + } + + return nil +} + +type dummyTokenStore struct { + tokenLength int +} + +func (d *dummyTokenStore) Pop(key string) (token *ClientToken) { + var data []byte = make([]byte, d.tokenLength) + rand.Read(data) + + return &ClientToken{ + data: data, + } +} + +func (d *dummyTokenStore) Put(_ string, _ *ClientToken) { + // Do nothing +} diff --git a/backend/vendor/github.com/enetx/uquic/u_packet_packer.go b/backend/vendor/github.com/enetx/uquic/u_packet_packer.go new file mode 100644 index 0000000..9e248d7 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/u_packet_packer.go @@ -0,0 +1,334 @@ +package quic + +import ( + "bytes" + "fmt" + + "github.com/gaukas/clienthellod" + "github.com/enetx/uquic/internal/handshake" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/wire" +) + +// uPacketPacker is an extended packetPacker which is used +// to customize some of the packetPacker's behaviors for +// UQUIC. +type uPacketPacker struct { + *packetPacker + + // initPktNbrLen PacketNumberLen + // qfs QUICFrames // [UQUIC] uses QUICFrames to customize encrypted frames + // udpDatagramMinSize int + uSpec *QUICSpec // [UQUIC] +} + +func newUPacketPacker( + packetPacker *packetPacker, + uSpec *QUICSpec, // [UQUIC] +) *uPacketPacker { + return &uPacketPacker{ + packetPacker: packetPacker, + uSpec: uSpec, // [UQUIC] + } +} + +// PackCoalescedPacket packs a new packet. +// It packs an Initial / Handshake if there is data to send in these packet number spaces. +// It should only be called before the handshake is confirmed. +func (p *uPacketPacker) PackCoalescedPacket(onlyAck bool, maxPacketSize protocol.ByteCount, v protocol.Version) (*coalescedPacket, error) { + var ( + initialHdr, handshakeHdr, zeroRTTHdr *wire.ExtendedHeader + initialPayload, handshakePayload, zeroRTTPayload, oneRTTPayload payload + oneRTTPacketNumber protocol.PacketNumber + oneRTTPacketNumberLen protocol.PacketNumberLen + ) + // Try packing an Initial packet. + initialSealer, err := p.cryptoSetup.GetInitialSealer() + if err != nil && err != handshake.ErrKeysDropped { + return nil, err + } + var size protocol.ByteCount + if initialSealer != nil { + initialHdr, initialPayload = p.maybeGetCryptoPacket(maxPacketSize-protocol.ByteCount(initialSealer.Overhead()), protocol.EncryptionInitial, onlyAck, true, v) + if initialPayload.length > 0 { + size += p.longHeaderPacketLength(initialHdr, initialPayload, v) + protocol.ByteCount(initialSealer.Overhead()) + } + + // // [UQUIC] + // if len(initialPayload.frames) > 0 { + // fmt.Printf("onlyAck: %t, PackCoalescedPacket: %v\n", onlyAck, initialPayload.frames[0].Frame) + // } + } + + // Add a Handshake packet. + var handshakeSealer sealer + if (onlyAck && size == 0) || (!onlyAck && size < maxPacketSize-protocol.MinCoalescedPacketSize) { + var err error + handshakeSealer, err = p.cryptoSetup.GetHandshakeSealer() + if err != nil && err != handshake.ErrKeysDropped && err != handshake.ErrKeysNotYetAvailable { + return nil, err + } + if handshakeSealer != nil { + handshakeHdr, handshakePayload = p.maybeGetCryptoPacket(maxPacketSize-size-protocol.ByteCount(handshakeSealer.Overhead()), protocol.EncryptionHandshake, onlyAck, size == 0, v) + if handshakePayload.length > 0 { + s := p.longHeaderPacketLength(handshakeHdr, handshakePayload, v) + protocol.ByteCount(handshakeSealer.Overhead()) + size += s + } + } + } + + // Add a 0-RTT / 1-RTT packet. + var zeroRTTSealer sealer + var oneRTTSealer handshake.ShortHeaderSealer + var connID protocol.ConnectionID + var kp protocol.KeyPhaseBit + if (onlyAck && size == 0) || (!onlyAck && size < maxPacketSize-protocol.MinCoalescedPacketSize) { + var err error + oneRTTSealer, err = p.cryptoSetup.Get1RTTSealer() + if err != nil && err != handshake.ErrKeysDropped && err != handshake.ErrKeysNotYetAvailable { + return nil, err + } + if err == nil { // 1-RTT + kp = oneRTTSealer.KeyPhase() + connID = p.getDestConnID() + oneRTTPacketNumber, oneRTTPacketNumberLen = p.pnManager.PeekPacketNumber(protocol.Encryption1RTT) + hdrLen := wire.ShortHeaderLen(connID, oneRTTPacketNumberLen) + oneRTTPayload = p.maybeGetShortHeaderPacket(oneRTTSealer, hdrLen, maxPacketSize-size, onlyAck, size == 0, v) + if oneRTTPayload.length > 0 { + size += p.shortHeaderPacketLength(connID, oneRTTPacketNumberLen, oneRTTPayload) + protocol.ByteCount(oneRTTSealer.Overhead()) + } + } else if p.perspective == protocol.PerspectiveClient && !onlyAck { // 0-RTT packets can't contain ACK frames + var err error + zeroRTTSealer, err = p.cryptoSetup.Get0RTTSealer() + if err != nil && err != handshake.ErrKeysDropped && err != handshake.ErrKeysNotYetAvailable { + return nil, err + } + if zeroRTTSealer != nil { + zeroRTTHdr, zeroRTTPayload = p.maybeGetAppDataPacketFor0RTT(zeroRTTSealer, maxPacketSize-size, v) + if zeroRTTPayload.length > 0 { + size += p.longHeaderPacketLength(zeroRTTHdr, zeroRTTPayload, v) + protocol.ByteCount(zeroRTTSealer.Overhead()) + } + } + } + } + + if initialPayload.length == 0 && handshakePayload.length == 0 && zeroRTTPayload.length == 0 && oneRTTPayload.length == 0 { + return nil, nil + } + + buffer := getPacketBuffer() + packet := &coalescedPacket{ + buffer: buffer, + longHdrPackets: make([]*longHeaderPacket, 0, 3), + } + if initialPayload.length > 0 { + if onlyAck || len(initialPayload.frames) == 0 { + // TODO: uQUIC should send Initial Packet ACK if requested. + // However, it should be otherwise configurable whether to request + // to send Initial Packet ACK or not. See quic-go#4007 + padding := p.initialPaddingLen(initialPayload.frames, size, maxPacketSize) + cont, err := p.appendLongHeaderPacket(buffer, initialHdr, initialPayload, padding, protocol.EncryptionInitial, initialSealer, v) + if err != nil { + return nil, err + } + packet.longHdrPackets = append(packet.longHdrPackets, cont) + } else { // [UQUIC] + cont, err := p.appendInitialPacket(buffer, initialHdr, initialPayload, protocol.EncryptionInitial, initialSealer, v) + if err != nil { + return nil, err + } + + packet.longHdrPackets = append(packet.longHdrPackets, cont) + } + } + if handshakePayload.length > 0 { + cont, err := p.appendLongHeaderPacket(buffer, handshakeHdr, handshakePayload, 0, protocol.EncryptionHandshake, handshakeSealer, v) + if err != nil { + return nil, err + } + packet.longHdrPackets = append(packet.longHdrPackets, cont) + } + if zeroRTTPayload.length > 0 { + longHdrPacket, err := p.appendLongHeaderPacket(buffer, zeroRTTHdr, zeroRTTPayload, 0, protocol.Encryption0RTT, zeroRTTSealer, v) + if err != nil { + return nil, err + } + packet.longHdrPackets = append(packet.longHdrPackets, longHdrPacket) + } else if oneRTTPayload.length > 0 { + shp, err := p.appendShortHeaderPacket(buffer, connID, oneRTTPacketNumber, oneRTTPacketNumberLen, kp, oneRTTPayload, 0, maxPacketSize, oneRTTSealer, false, v) + if err != nil { + return nil, err + } + packet.shortHdrPacket = &shp + } + return packet, nil +} + +// [UQUIC] +func (p *uPacketPacker) appendInitialPacket(buffer *packetBuffer, header *wire.ExtendedHeader, pl payload, encLevel protocol.EncryptionLevel, sealer sealer, v protocol.Version) (*longHeaderPacket, error) { + // Shouldn't need this? + // if p.uSpec.InitialPacketSpec.InitPacketNumberLength > 0 { + // header.PacketNumberLen = p.uSpec.InitialPacketSpec.InitPacketNumberLength + // } + + uPayload, err := p.MarshalInitialPacketPayload(pl, v) + if err != nil { + return nil, err + } + + pnLen := protocol.ByteCount(header.PacketNumberLen) + header.Length = pnLen + protocol.ByteCount(sealer.Overhead()) + protocol.ByteCount(len(uPayload)) + + startLen := len(buffer.Data) + raw := buffer.Data[startLen:] // [UQUIC] the raw here is a sub-slice of buffer.Data, latter's len < size + + raw, err = header.Append(raw, v) + if err != nil { + return nil, err + } + payloadOffset := protocol.ByteCount(len(raw)) + raw = append(raw, uPayload...) + + // fmt.Printf("Payload: %x\n", raw[payloadOffset:]) + + // fmt.Printf("Pre-Encryption: %x\n", raw) + + raw = p.encryptPacket(raw, sealer, header.PacketNumber, payloadOffset, pnLen) + buffer.Data = buffer.Data[:len(buffer.Data)+len(raw)] + + // fmt.Printf("Post-Encryption: %x\n", raw) + + // [UQUIC] + // append zero to buffer.Data until min size is reached + minUDPSize := p.uSpec.UDPDatagramMinSize + if minUDPSize == 0 { + minUDPSize = DefaultUDPDatagramMinSize + } + if len(buffer.Data) < minUDPSize { + buffer.Data = append(buffer.Data, make([]byte, minUDPSize-len(buffer.Data))...) + } + + if pn := p.pnManager.PopPacketNumber(encLevel); pn != header.PacketNumber { + return nil, fmt.Errorf("packetPacker BUG: Peeked and Popped packet numbers do not match: expected %d, got %d", pn, header.PacketNumber) + } + return &longHeaderPacket{ + header: header, + ack: pl.ack, + frames: pl.frames, + streamFrames: pl.streamFrames, + length: protocol.ByteCount(len(raw)), + }, nil +} + +func (p *uPacketPacker) MarshalInitialPacketPayload(pl payload, v protocol.Version) ([]byte, error) { + var originalFrameBytes []byte + + for _, f := range pl.frames { + var err error + // only append crypto frames + if _, ok := f.Frame.(*wire.CryptoFrame); !ok { + continue + } + + originalFrameBytes, err = f.Frame.Append(originalFrameBytes, v) + if err != nil { + return nil, err + } + } + + // extract CryptoData from originalFrameBytes + // parse frames + r := bytes.NewReader(originalFrameBytes) + qchframes, err := clienthellod.ReadAllFrames(r) + if err != nil { + return nil, err + } + + // parse crypto data + cryptoData, err := clienthellod.ReassembleCRYPTOFrames(qchframes) + if err != nil { + return nil, err + } + + if p.uSpec.InitialPacketSpec.FrameBuilder == nil { + qfs := QUICFrames{} + return qfs.Build(cryptoData) + } + return p.uSpec.InitialPacketSpec.FrameBuilder.Build(cryptoData) +} + +func (p *uPacketPacker) MaybePackProbePacket(encLevel protocol.EncryptionLevel, maxPacketSize protocol.ByteCount, v protocol.Version) (*coalescedPacket, error) { + if encLevel == protocol.Encryption1RTT { + s, err := p.cryptoSetup.Get1RTTSealer() + if err != nil { + return nil, err + } + kp := s.KeyPhase() + connID := p.getDestConnID() + pn, pnLen := p.pnManager.PeekPacketNumber(protocol.Encryption1RTT) + hdrLen := wire.ShortHeaderLen(connID, pnLen) + pl := p.maybeGetAppDataPacket(maxPacketSize-protocol.ByteCount(s.Overhead())-hdrLen, false, true, v) + if pl.length == 0 { + return nil, nil + } + buffer := getPacketBuffer() + packet := &coalescedPacket{buffer: buffer} + shp, err := p.appendShortHeaderPacket(buffer, connID, pn, pnLen, kp, pl, 0, maxPacketSize, s, false, v) + if err != nil { + return nil, err + } + packet.shortHdrPacket = &shp + return packet, nil + } + + var hdr *wire.ExtendedHeader + var pl payload + var sealer handshake.LongHeaderSealer + //nolint:exhaustive // Probe packets are never sent for 0-RTT. + switch encLevel { + case protocol.EncryptionInitial: + var err error + sealer, err = p.cryptoSetup.GetInitialSealer() + if err != nil { + return nil, err + } + hdr, pl = p.maybeGetCryptoPacket(maxPacketSize-protocol.ByteCount(sealer.Overhead()), protocol.EncryptionInitial, false, true, v) + case protocol.EncryptionHandshake: + var err error + sealer, err = p.cryptoSetup.GetHandshakeSealer() + if err != nil { + return nil, err + } + hdr, pl = p.maybeGetCryptoPacket(maxPacketSize-protocol.ByteCount(sealer.Overhead()), protocol.EncryptionHandshake, false, true, v) + default: + panic("unknown encryption level") + } + + if pl.length == 0 { + return nil, nil + } + buffer := getPacketBuffer() + packet := &coalescedPacket{buffer: buffer} + size := p.longHeaderPacketLength(hdr, pl, v) + protocol.ByteCount(sealer.Overhead()) + var padding protocol.ByteCount + if encLevel == protocol.EncryptionInitial { + if p.uSpec == nil { // default behavior + padding = p.initialPaddingLen(pl.frames, size, maxPacketSize) + } else { // otherwise we resend the spec-based initial packet + initPkt, err := p.appendInitialPacket(buffer, hdr, pl, protocol.EncryptionInitial, sealer, v) + if err != nil { + return nil, err + } + + packet.longHdrPackets = []*longHeaderPacket{initPkt} + return packet, nil + } + } + + longHdrPacket, err := p.appendLongHeaderPacket(buffer, hdr, pl, padding, encLevel, sealer, v) + if err != nil { + return nil, err + } + packet.longHdrPackets = []*longHeaderPacket{longHdrPacket} + return packet, nil +} diff --git a/backend/vendor/github.com/enetx/uquic/u_parrot.go b/backend/vendor/github.com/enetx/uquic/u_parrot.go new file mode 100644 index 0000000..d8c2d9d --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/u_parrot.go @@ -0,0 +1,686 @@ +package quic + +import ( + "crypto/rand" + "fmt" + "math/big" + mrand "math/rand" + + tls "github.com/enetx/utls" +) + +type QUICID struct { + Client string + + // Version specifies version of a mimicked clients (e.g. browsers). + Version string + + // Fingerprint is a unique identifier for each different QUIC client/spec. + Fingerprint string +} + +const ( + // clients + quicFirefox = "Firefox" + quicChrome = "Chrome" + quicIOS = "iOS" + quicAndroid = "Android" + quicEdge = "Edge" + quicSafari = "Safari" +) + +var ( + QUICFirefox_116 = QUICFirefox_116A // point to most-popular 8-byte DCID + QUICFirefox_116A = QUICID{quicFirefox, "116", "31ea0e4ffd75b477"} // DCID.len = 8 + QUICFirefox_116B = QUICID{quicFirefox, "116", "d07d3c9152fbc5e0"} // DCID.len = 9 + QUICFirefox_116C = QUICID{quicFirefox, "116", "c74f87b2a9ccc006"} // DCID.len = 15 + // TODO: add Firefox fingerprints with Token and PSK extension + + QUICChrome_115 = QUICChrome_115_IPv4 // IPv4 is still more popular + QUICChrome_115_IPv4 = QUICID{quicChrome, "115", "beeb454235791d5c"} // IPv4: UDP payload 20-byte longer than IPv6 due to padding + QUICChrome_115_IPv6 = QUICID{quicChrome, "115_ip6", "beeb454235791d5c"} // IPv6 + // TODO: add Chrome fingerprints with Token and PSK extension + + // TODO: add more QUIC clients and versions +) + +func QUICID2Spec(id QUICID) (QUICSpec, error) { + switch id { + case QUICChrome_115_IPv4: + return QUICSpec{ + InitialPacketSpec: InitialPacketSpec{ + SrcConnIDLength: 0, + DestConnIDLength: 8, + InitPacketNumberLength: 1, + InitPacketNumber: 1, // Chrome is special that it starts with 1 not 0 + ClientTokenLength: 0, + FrameBuilder: &QUICRandomFrames{ // Chrome randomly inserts padding frames + MinPING: 0, + MaxPING: 10, + MinCRYPTO: 1, + MaxCRYPTO: 10, + MinPADDING: 3, + MaxPADDING: 6, + Length: 1231 - 16, // 16-byte for Auth Tag + }, + }, + ClientHelloSpec: &tls.ClientHelloSpec{ + TLSVersMin: tls.VersionTLS13, + TLSVersMax: tls.VersionTLS13, + CipherSuites: []uint16{ + tls.TLS_AES_128_GCM_SHA256, + tls.TLS_AES_256_GCM_SHA384, + tls.TLS_CHACHA20_POLY1305_SHA256, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: tls.ShuffleChromeTLSExtensions([]tls.TLSExtension{ + ShuffleQUICTransportParameters(&tls.QUICTransportParametersExtension{ // Order of QTPs are always shuffled + TransportParameters: tls.TransportParameters{ + tls.InitialMaxStreamsUni(103), + tls.MaxIdleTimeout(30000), + tls.InitialMaxData(15728640), + tls.InitialMaxStreamDataUni(6291456), + &tls.VersionInformation{ + ChoosenVersion: tls.VERSION_1, + AvailableVersions: []uint32{ + tls.VERSION_GREASE, + tls.VERSION_1, + }, + LegacyID: true, + }, + &tls.FakeQUICTransportParameter{ // google_quic_version + Id: 0x4752, + Val: []byte{00, 00, 00, 01}, // Google QUIC version 1 + }, + &tls.FakeQUICTransportParameter{ // google_connection_options + Id: 0x3128, + Val: []byte{0x52, 0x56, 0x43, 0x4d}, + }, + tls.MaxDatagramFrameSize(65536), + tls.InitialMaxStreamsBidi(100), + tls.InitialMaxStreamDataBidiLocal(6291456), + VariableLengthGREASEQTP(0x10), // Random length for GREASE QTP + tls.InitialSourceConnectionID([]byte{}), + tls.MaxUDPPayloadSize(1472), + tls.InitialMaxStreamDataBidiRemote(6291456), + }, + }), + &tls.ApplicationSettingsExtension{ + SupportedProtocols: []string{ + "h3", + }, + }, + &tls.UtlsCompressCertExtension{ + Algorithms: []tls.CertCompressionAlgo{ + tls.CertCompressionBrotli, + }, + }, + &tls.KeyShareExtension{ + KeyShares: []tls.KeyShare{ + { + Group: tls.X25519, + }, + }, + }, + &tls.SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []tls.SignatureScheme{ + tls.ECDSAWithP256AndSHA256, + tls.PSSWithSHA256, + tls.PKCS1WithSHA256, + tls.ECDSAWithP384AndSHA384, + tls.PSSWithSHA384, + tls.PKCS1WithSHA384, + tls.PSSWithSHA512, + tls.PKCS1WithSHA512, + tls.PKCS1WithSHA1, + }, + }, + &tls.SNIExtension{}, + &tls.SupportedCurvesExtension{ + Curves: []tls.CurveID{ + tls.CurveX25519, + tls.CurveSECP256R1, + tls.CurveSECP384R1, + }, + }, + &tls.PSKKeyExchangeModesExtension{ + Modes: []uint8{ + tls.PskModeDHE, + }, + }, + &tls.ALPNExtension{ + AlpnProtocols: []string{ + "h3", + }, + }, + &tls.SupportedVersionsExtension{ + Versions: []uint16{ + tls.VersionTLS13, + }, + }, + }), + }, + }, nil + case QUICChrome_115_IPv6: + return QUICSpec{ + InitialPacketSpec: InitialPacketSpec{ + SrcConnIDLength: 0, + DestConnIDLength: 8, + InitPacketNumberLength: 1, + InitPacketNumber: 1, // Chrome is special that it starts with 1 not 0 + ClientTokenLength: 0, + FrameBuilder: &QUICRandomFrames{ // Chrome randomly inserts padding frames + MinPING: 0, + MaxPING: 10, + MinCRYPTO: 1, + MaxCRYPTO: 10, + MinPADDING: 3, + MaxPADDING: 6, + Length: 1211 - 16, // IPv6 pads to a length that is 20-byte shorter than IPv4's version + }, + }, + ClientHelloSpec: &tls.ClientHelloSpec{ + TLSVersMin: tls.VersionTLS13, + TLSVersMax: tls.VersionTLS13, + CipherSuites: []uint16{ + tls.TLS_AES_128_GCM_SHA256, + tls.TLS_AES_256_GCM_SHA384, + tls.TLS_CHACHA20_POLY1305_SHA256, + }, + CompressionMethods: []uint8{ + 0x0, + }, + Extensions: tls.ShuffleChromeTLSExtensions([]tls.TLSExtension{ + ShuffleQUICTransportParameters(&tls.QUICTransportParametersExtension{ // Order of QTPs are always shuffled + TransportParameters: tls.TransportParameters{ + tls.InitialMaxStreamsUni(103), + tls.MaxIdleTimeout(30000), + tls.InitialMaxData(15728640), + tls.InitialMaxStreamDataUni(6291456), + &tls.VersionInformation{ + ChoosenVersion: tls.VERSION_1, + AvailableVersions: []uint32{ + tls.VERSION_GREASE, + tls.VERSION_1, + }, + LegacyID: true, + }, + &tls.FakeQUICTransportParameter{ // google_quic_version + Id: 0x4752, + Val: []byte{00, 00, 00, 01}, // Google QUIC version 1 + }, + &tls.FakeQUICTransportParameter{ // google_connection_options + Id: 0x3128, + Val: []byte{0x52, 0x56, 0x43, 0x4d}, + }, + tls.MaxDatagramFrameSize(65536), + tls.InitialMaxStreamsBidi(100), + tls.InitialMaxStreamDataBidiLocal(6291456), + VariableLengthGREASEQTP(0x10), // Random length for GREASE QTP + tls.InitialSourceConnectionID([]byte{}), + tls.MaxUDPPayloadSize(1472), + tls.InitialMaxStreamDataBidiRemote(6291456), + }, + }), + &tls.ApplicationSettingsExtension{ + SupportedProtocols: []string{ + "h3", + }, + }, + &tls.UtlsCompressCertExtension{ + Algorithms: []tls.CertCompressionAlgo{ + tls.CertCompressionBrotli, + }, + }, + &tls.KeyShareExtension{ + KeyShares: []tls.KeyShare{ + { + Group: tls.X25519, + }, + }, + }, + &tls.SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []tls.SignatureScheme{ + tls.ECDSAWithP256AndSHA256, + tls.PSSWithSHA256, + tls.PKCS1WithSHA256, + tls.ECDSAWithP384AndSHA384, + tls.PSSWithSHA384, + tls.PKCS1WithSHA384, + tls.PSSWithSHA512, + tls.PKCS1WithSHA512, + tls.PKCS1WithSHA1, + }, + }, + &tls.SNIExtension{}, + &tls.SupportedCurvesExtension{ + Curves: []tls.CurveID{ + tls.CurveX25519, + tls.CurveSECP256R1, + tls.CurveSECP384R1, + }, + }, + &tls.PSKKeyExchangeModesExtension{ + Modes: []uint8{ + tls.PskModeDHE, + }, + }, + &tls.ALPNExtension{ + AlpnProtocols: []string{ + "h3", + }, + }, + &tls.SupportedVersionsExtension{ + Versions: []uint16{ + tls.VersionTLS13, + }, + }, + }), + }, + }, nil + case QUICFirefox_116A: + return QUICSpec{ + InitialPacketSpec: InitialPacketSpec{ + SrcConnIDLength: 3, + DestConnIDLength: 8, + InitPacketNumberLength: 1, + InitPacketNumber: 0, + ClientTokenLength: 0, + FrameBuilder: QUICFrames{}, // empty = single crypto + }, + ClientHelloSpec: &tls.ClientHelloSpec{ + TLSVersMin: tls.VersionTLS13, + TLSVersMax: tls.VersionTLS13, + CipherSuites: []uint16{ + tls.TLS_AES_128_GCM_SHA256, + tls.TLS_CHACHA20_POLY1305_SHA256, + tls.TLS_AES_256_GCM_SHA384, + }, + CompressionMethods: []uint8{ + 0x0, + }, + Extensions: []tls.TLSExtension{ + &tls.SNIExtension{}, + &tls.ExtendedMasterSecretExtension{}, + &tls.RenegotiationInfoExtension{ + Renegotiation: tls.RenegotiateOnceAsClient, + }, + &tls.SupportedCurvesExtension{ + Curves: []tls.CurveID{ + tls.CurveX25519, + tls.CurveSECP256R1, + tls.CurveSECP384R1, + tls.CurveSECP521R1, + tls.FakeCurveFFDHE2048, + tls.FakeCurveFFDHE3072, + tls.FakeCurveFFDHE4096, + tls.FakeCurveFFDHE6144, + tls.FakeCurveFFDHE8192, + }, + }, + &tls.ALPNExtension{ + AlpnProtocols: []string{ + "h3", + }, + }, + &tls.StatusRequestExtension{}, + &tls.FakeDelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []tls.SignatureScheme{ + tls.ECDSAWithP256AndSHA256, + tls.ECDSAWithP384AndSHA384, + tls.ECDSAWithP521AndSHA512, + tls.ECDSAWithSHA1, + }, + }, + &tls.KeyShareExtension{ + KeyShares: []tls.KeyShare{ + { + Group: tls.X25519, + }, + }, + }, + &tls.SupportedVersionsExtension{ + Versions: []uint16{ + tls.VersionTLS13, + }, + }, + &tls.SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []tls.SignatureScheme{ + tls.ECDSAWithP256AndSHA256, + tls.ECDSAWithP384AndSHA384, + tls.ECDSAWithP521AndSHA512, + tls.ECDSAWithSHA1, + tls.PSSWithSHA256, + tls.PSSWithSHA384, + tls.PSSWithSHA512, + tls.PKCS1WithSHA256, + tls.PKCS1WithSHA384, + tls.PKCS1WithSHA512, + tls.PKCS1WithSHA1, + }, + }, + &tls.PSKKeyExchangeModesExtension{ + Modes: []uint8{ + tls.PskModeDHE, + }, + }, + &tls.FakeRecordSizeLimitExtension{ + Limit: 0x4001, + }, + ShuffleQUICTransportParameters(&tls.QUICTransportParametersExtension{ + TransportParameters: tls.TransportParameters{ + tls.InitialMaxStreamDataBidiRemote(0x100000), + tls.InitialMaxStreamsBidi(16), + tls.MaxDatagramFrameSize(1200), + tls.MaxIdleTimeout(30000), + tls.ActiveConnectionIDLimit(8), + &tls.GREASEQUICBit{}, + &tls.VersionInformation{ + ChoosenVersion: tls.VERSION_1, + AvailableVersions: []uint32{ + tls.VERSION_GREASE, + tls.VERSION_1, + }, + LegacyID: true, + }, + tls.InitialMaxStreamsUni(16), + &tls.GREASETransportParameter{ + Length: 2, // Firefox uses 2-byte GREASE values + }, + tls.InitialMaxStreamDataBidiLocal(0xc00000), + tls.InitialMaxStreamDataUni(0x100000), + tls.InitialSourceConnectionID([]byte{}), + tls.MaxAckDelay(20), + tls.InitialMaxData(0x1800000), + &tls.DisableActiveMigration{}, + }, + }), + &tls.UtlsPaddingExtension{ + GetPaddingLen: tls.BoringPaddingStyle, + }, + }, + }, + UDPDatagramMinSize: 1357, // Firefox pads with zeroes at the end of UDP datagrams + }, nil + case QUICFirefox_116B: + return QUICSpec{ + InitialPacketSpec: InitialPacketSpec{ + SrcConnIDLength: 3, + DestConnIDLength: 9, + InitPacketNumberLength: 1, + InitPacketNumber: 0, + ClientTokenLength: 0, + FrameBuilder: QUICFrames{}, + }, + ClientHelloSpec: &tls.ClientHelloSpec{ + TLSVersMin: tls.VersionTLS13, + TLSVersMax: tls.VersionTLS13, + CipherSuites: []uint16{ + tls.TLS_AES_128_GCM_SHA256, + tls.TLS_CHACHA20_POLY1305_SHA256, + tls.TLS_AES_256_GCM_SHA384, + }, + CompressionMethods: []uint8{ + 0x0, + }, + Extensions: []tls.TLSExtension{ + &tls.SNIExtension{}, + &tls.ExtendedMasterSecretExtension{}, + &tls.RenegotiationInfoExtension{ + Renegotiation: tls.RenegotiateOnceAsClient, + }, + &tls.SupportedCurvesExtension{ + Curves: []tls.CurveID{ + tls.CurveX25519, + tls.CurveSECP256R1, + tls.CurveSECP384R1, + tls.CurveSECP521R1, + tls.FakeCurveFFDHE2048, + tls.FakeCurveFFDHE3072, + tls.FakeCurveFFDHE4096, + tls.FakeCurveFFDHE6144, + tls.FakeCurveFFDHE8192, + }, + }, + &tls.ALPNExtension{ + AlpnProtocols: []string{ + "h3", + }, + }, + &tls.StatusRequestExtension{}, + &tls.FakeDelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []tls.SignatureScheme{ + tls.ECDSAWithP256AndSHA256, + tls.ECDSAWithP384AndSHA384, + tls.ECDSAWithP521AndSHA512, + tls.ECDSAWithSHA1, + }, + }, + &tls.KeyShareExtension{ + KeyShares: []tls.KeyShare{ + { + Group: tls.X25519, + }, + }, + }, + &tls.SupportedVersionsExtension{ + Versions: []uint16{ + tls.VersionTLS13, + }, + }, + &tls.SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []tls.SignatureScheme{ + tls.ECDSAWithP256AndSHA256, + tls.ECDSAWithP384AndSHA384, + tls.ECDSAWithP521AndSHA512, + tls.ECDSAWithSHA1, + tls.PSSWithSHA256, + tls.PSSWithSHA384, + tls.PSSWithSHA512, + tls.PKCS1WithSHA256, + tls.PKCS1WithSHA384, + tls.PKCS1WithSHA512, + tls.PKCS1WithSHA1, + }, + }, + &tls.PSKKeyExchangeModesExtension{ + Modes: []uint8{ + tls.PskModeDHE, + }, + }, + &tls.FakeRecordSizeLimitExtension{ + Limit: 0x4001, + }, + ShuffleQUICTransportParameters(&tls.QUICTransportParametersExtension{ + TransportParameters: tls.TransportParameters{ + tls.InitialMaxStreamDataBidiRemote(0x100000), + tls.InitialMaxStreamsBidi(16), + tls.MaxDatagramFrameSize(1200), + tls.MaxIdleTimeout(30000), + tls.ActiveConnectionIDLimit(8), + &tls.GREASEQUICBit{}, + &tls.VersionInformation{ + ChoosenVersion: tls.VERSION_1, + AvailableVersions: []uint32{ + tls.VERSION_GREASE, + tls.VERSION_1, + }, + LegacyID: true, + }, + tls.InitialMaxStreamsUni(16), + &tls.GREASETransportParameter{ + Length: 2, // Firefox uses 2-byte GREASE values + }, + tls.InitialMaxStreamDataBidiLocal(0xc00000), + tls.InitialMaxStreamDataUni(0x100000), + tls.InitialSourceConnectionID([]byte{}), + tls.MaxAckDelay(20), + tls.InitialMaxData(0x1800000), + &tls.DisableActiveMigration{}, + }, + }), + &tls.UtlsPaddingExtension{ + GetPaddingLen: tls.BoringPaddingStyle, + }, + }, + }, + UDPDatagramMinSize: 1357, + }, nil + case QUICFirefox_116C: + return QUICSpec{ + InitialPacketSpec: InitialPacketSpec{ + SrcConnIDLength: 3, + DestConnIDLength: 15, + InitPacketNumberLength: 1, + InitPacketNumber: 0, + ClientTokenLength: 0, + FrameBuilder: QUICFrames{}, + }, + ClientHelloSpec: &tls.ClientHelloSpec{ + TLSVersMin: tls.VersionTLS13, + TLSVersMax: tls.VersionTLS13, + CipherSuites: []uint16{ + tls.TLS_AES_128_GCM_SHA256, + tls.TLS_CHACHA20_POLY1305_SHA256, + tls.TLS_AES_256_GCM_SHA384, + }, + CompressionMethods: []uint8{ + 0x0, + }, + Extensions: []tls.TLSExtension{ + &tls.SNIExtension{}, + &tls.ExtendedMasterSecretExtension{}, + &tls.RenegotiationInfoExtension{ + Renegotiation: tls.RenegotiateOnceAsClient, + }, + &tls.SupportedCurvesExtension{ + Curves: []tls.CurveID{ + tls.CurveX25519, + tls.CurveSECP256R1, + tls.CurveSECP384R1, + tls.CurveSECP521R1, + tls.FakeCurveFFDHE2048, + tls.FakeCurveFFDHE3072, + tls.FakeCurveFFDHE4096, + tls.FakeCurveFFDHE6144, + tls.FakeCurveFFDHE8192, + }, + }, + &tls.ALPNExtension{ + AlpnProtocols: []string{ + "h3", + }, + }, + &tls.StatusRequestExtension{}, + &tls.FakeDelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []tls.SignatureScheme{ + tls.ECDSAWithP256AndSHA256, + tls.ECDSAWithP384AndSHA384, + tls.ECDSAWithP521AndSHA512, + tls.ECDSAWithSHA1, + }, + }, + &tls.KeyShareExtension{ + KeyShares: []tls.KeyShare{ + { + Group: tls.X25519, + }, + }, + }, + &tls.SupportedVersionsExtension{ + Versions: []uint16{ + tls.VersionTLS13, + }, + }, + &tls.SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []tls.SignatureScheme{ + tls.ECDSAWithP256AndSHA256, + tls.ECDSAWithP384AndSHA384, + tls.ECDSAWithP521AndSHA512, + tls.ECDSAWithSHA1, + tls.PSSWithSHA256, + tls.PSSWithSHA384, + tls.PSSWithSHA512, + tls.PKCS1WithSHA256, + tls.PKCS1WithSHA384, + tls.PKCS1WithSHA512, + tls.PKCS1WithSHA1, + }, + }, + &tls.PSKKeyExchangeModesExtension{ + Modes: []uint8{ + tls.PskModeDHE, + }, + }, + &tls.FakeRecordSizeLimitExtension{ + Limit: 0x4001, + }, + ShuffleQUICTransportParameters(&tls.QUICTransportParametersExtension{ + TransportParameters: tls.TransportParameters{ + tls.InitialMaxStreamDataBidiRemote(0x100000), + tls.InitialMaxStreamsBidi(16), + tls.MaxDatagramFrameSize(1200), + tls.MaxIdleTimeout(30000), + tls.ActiveConnectionIDLimit(8), + &tls.GREASEQUICBit{}, + &tls.VersionInformation{ + ChoosenVersion: tls.VERSION_1, + AvailableVersions: []uint32{ + tls.VERSION_GREASE, + tls.VERSION_1, + }, + LegacyID: true, + }, + tls.InitialMaxStreamsUni(16), + &tls.GREASETransportParameter{ + Length: 2, + }, + tls.InitialMaxStreamDataBidiLocal(0xc00000), + tls.InitialMaxStreamDataUni(0x100000), + tls.InitialSourceConnectionID([]byte{}), + tls.MaxAckDelay(20), + tls.InitialMaxData(0x1800000), + &tls.DisableActiveMigration{}, + }, + }), + &tls.UtlsPaddingExtension{ + GetPaddingLen: tls.BoringPaddingStyle, + }, + }, + }, + UDPDatagramMinSize: 1357, + }, nil + default: + return QUICSpec{}, fmt.Errorf("unknown QUIC ID: %v", id) + } +} + +func ShuffleTLSExtensions(exts []tls.TLSExtension) []tls.TLSExtension { + mrand.Shuffle(len(exts), func(i, j int) { + exts[i], exts[j] = exts[j], exts[i] + }) + return exts +} + +func ShuffleQUICTransportParameters(qtp *tls.QUICTransportParametersExtension) *tls.QUICTransportParametersExtension { + // shuffle the order of parameters + mrand.Shuffle(len(qtp.TransportParameters), func(i, j int) { + qtp.TransportParameters[i], qtp.TransportParameters[j] = qtp.TransportParameters[j], qtp.TransportParameters[i] + }) + return qtp +} + +func VariableLengthGREASEQTP(maxLen int) *tls.GREASETransportParameter { + // get random length for GREASE + greaseMaxLen := big.NewInt(0x10) + greaseLen, err := rand.Int(rand.Reader, greaseMaxLen) + if err != nil { + panic(err) + } + + return &tls.GREASETransportParameter{ + Length: uint16(greaseLen.Uint64()), + } +} diff --git a/backend/vendor/github.com/enetx/uquic/u_quic_frames.go b/backend/vendor/github.com/enetx/uquic/u_quic_frames.go new file mode 100644 index 0000000..823ee33 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/u_quic_frames.go @@ -0,0 +1,295 @@ +package quic + +import ( + "bytes" + "crypto/rand" + "errors" + "math/big" + mrand "math/rand" + + "github.com/gaukas/clienthellod" + "github.com/enetx/uquic/quicvarint" +) + +type QUICFrameBuilder interface { + // Build ingests data from crypto frames without the crypto frame header + // and returns the byte representation of all frames. + Build(cryptoData []byte) (allFrames []byte, err error) +} + +// QUICFrames is a slice of QUICFrame that implements QUICFrameBuilder. +// It could be used to deterministically build QUIC Frames from crypto data. +type QUICFrames []QUICFrame + +// Build ingests data from crypto frames without the crypto frame header +// and returns the byte representation of all frames as specified in +// the slice. +func (qfs QUICFrames) Build(cryptoData []byte) (payload []byte, err error) { + if len(qfs) == 0 { // If no frames specified, send a single crypto frame + qfsCryptoOnly := QUICFrames{QUICFrameCrypto{0, 0}} + return qfsCryptoOnly.Build(cryptoData) + } + + for _, frame := range qfs { + var frameBytes []byte + if offset, length, cryptoOK := frame.CryptoFrameInfo(); cryptoOK { + if length == 0 { + // calculate length: from offset to the end of cryptoData + length = len(cryptoData) - offset + } + frameBytes = []byte{0x06} // CRYPTO frame type + frameBytes = quicvarint.Append(frameBytes, uint64(offset)) + frameBytes = quicvarint.Append(frameBytes, uint64(length)) + frameCryptoData := make([]byte, length) + copy(frameCryptoData, cryptoData[offset:]) // copy at most length bytes + frameBytes = append(frameBytes, frameCryptoData...) + } else { // Handle none crypto frames: read and append to payload + frameBytes, err = frame.Read() + if err != nil { + return nil, err + } + } + payload = append(payload, frameBytes...) + } + return payload, nil +} + +// BuildFromFrames ingests data from all input frames and returns the byte representation +// of all frames as specified in the slice. +func (qfs QUICFrames) BuildFromFrames(frames []byte) (payload []byte, err error) { + // parse frames + r := bytes.NewReader(frames) + qchframes, err := clienthellod.ReadAllFrames(r) + if err != nil { + return nil, err + } + + // parse crypto data + cryptoData, err := clienthellod.ReassembleCRYPTOFrames(qchframes) + if err != nil { + return nil, err + } + + // marshal + return qfs.Build(cryptoData) +} + +// QUICFrame is the interface for all QUIC frames to be included in the Initial Packet. +type QUICFrame interface { + // None crypto frames should return false for cryptoOK + CryptoFrameInfo() (offset, length int, cryptoOK bool) + + // None crypto frames should return the byte representation of the frame. + // Crypto frames' behavior is undefined and unused. + Read() ([]byte, error) +} + +// QUICFrameCrypto is used to specify the crypto frames containing the TLS ClientHello +// to be sent in the first Initial packet. +type QUICFrameCrypto struct { + // Offset is used to specify the starting offset of the crypto frame. + // Used when sending multiple crypto frames in a single packet. + // + // Multiple crypto frames in a single packet must not overlap and must + // make up an entire crypto stream continuously. + Offset int + + // Length is used to specify the length of the crypto frame. + // + // Must be set if it is NOT the last crypto frame in a packet. + Length int +} + +// CryptoFrameInfo() implements the QUICFrame interface. +// +// Crypto frames are later replaced by the crypto message using the information +// returned by this function. +func (q QUICFrameCrypto) CryptoFrameInfo() (offset, length int, cryptoOK bool) { + return q.Offset, q.Length, true +} + +// Read() implements the QUICFrame interface. +// +// Crypto frames are later replaced by the crypto message, so they are not Read()-able. +func (q QUICFrameCrypto) Read() ([]byte, error) { + return nil, errors.New("crypto frames are not Read()-able") +} + +// QUICFramePadding is used to specify the padding frames to be sent in the first Initial +// packet. +type QUICFramePadding struct { + // Length is used to specify the length of the padding frame. + Length int +} + +// CryptoFrameInfo() implements the QUICFrame interface. +func (q QUICFramePadding) CryptoFrameInfo() (offset, length int, cryptoOK bool) { + return 0, 0, false +} + +// Read() implements the QUICFrame interface. +// +// Padding simply returns a slice of bytes of the specified length filled with 0. +func (q QUICFramePadding) Read() ([]byte, error) { + return make([]byte, q.Length), nil +} + +// QUICFramePing is used to specify the ping frames to be sent in the first Initial +// packet. +type QUICFramePing struct{} + +// CryptoFrameInfo() implements the QUICFrame interface. +func (q QUICFramePing) CryptoFrameInfo() (offset, length int, cryptoOK bool) { + return 0, 0, false +} + +// Read() implements the QUICFrame interface. +// +// Ping simply returns a slice of bytes of size 1 with value 0x01(PING). +func (q QUICFramePing) Read() ([]byte, error) { + return []byte{0x01}, nil +} + +// QUICRandomFrames could be used to indeterministically build QUIC Frames from +// crypto data. A caller may specify how many PING and CRYPTO frames are expected +// to be included in the Initial Packet, as well as the total length plus PADDING +// frames in the end. +type QUICRandomFrames struct { + // MinPING specifies the inclusive lower bound of the number of PING frames to be + // included in the Initial Packet. + MinPING uint8 + + // MaxPING specifies the exclusive upper bound of the number of PING frames to be + // included in the Initial Packet. It must be at least MinPING+1. + MaxPING uint8 + + // MinCRYPTO specifies the inclusive lower bound of the number of CRYPTO frames to + // split the Crypto data into. It must be at least 1. + MinCRYPTO uint8 + + // MaxCRYPTO specifies the exclusive upper bound of the number of CRYPTO frames to + // split the Crypto data into. It must be at least MinCRYPTO+1. + MaxCRYPTO uint8 + + // MinPADDING specifies the inclusive lower bound of the number of PADDING frames + // to be included in the Initial Packet. It must be at least 1 if Length is not 0. + MinPADDING uint8 + + // MaxPADDING specifies the exclusive upper bound of the number of PADDING frames + // to be included in the Initial Packet. It must be at least MinPADDING+1 if + // Length is not 0. + MaxPADDING uint8 + + // Length specifies the total length of all frames including PADDING frames. + // If the Length specified is already exceeded by the CRYPTO+PING frames, no + // PADDING frames will be included. + Length uint16 // 2 bytes, max 65535 +} + +// Build ingests data from crypto frames without the crypto frame header +// and returns the byte representation of all frames as specified in +// the slice. +func (qrf *QUICRandomFrames) Build(cryptoData []byte) (payload []byte, err error) { + // check all bounds + if qrf.MinPING > qrf.MaxPING { + return nil, errors.New("MinPING must be less than or equal to MaxPING") + } + if qrf.MinCRYPTO < 1 { + return nil, errors.New("MinCRYPTO must be at least 1") + } + if qrf.MinCRYPTO > qrf.MaxCRYPTO { + return nil, errors.New("MinCRYPTO must be less than or equal to MaxCRYPTO") + } + if qrf.MinPADDING < 1 && qrf.Length != 0 { + return nil, errors.New("MinPADDING must be at least 1 if Length is not 0") + } + if qrf.MinPADDING > qrf.MaxPADDING && qrf.Length != 0 { + return nil, errors.New("MinPADDING must be less than or equal to MaxPADDING if Length is not 0") + } + + var frameList QUICFrames = make([]QUICFrame, 0) + + var cryptoSafeRandUint64 = func(min, max uint64) (uint64, error) { + minMaxDiff := big.NewInt(int64(max - min)) + offset, err := rand.Int(rand.Reader, minMaxDiff) + if err != nil { + return 0, err + } + return min + offset.Uint64(), nil + } + + // determine number of PING frames with crypto.rand + numPING, err := cryptoSafeRandUint64(uint64(qrf.MinPING), uint64(qrf.MaxPING)) + if err != nil { + return nil, err + } + + // append PING frames + for i := uint64(0); i < numPING; i++ { + frameList = append(frameList, QUICFramePing{}) + } + + // determine number of CRYPTO frames with crypto.rand + numCRYPTO, err := cryptoSafeRandUint64(uint64(qrf.MinCRYPTO), uint64(qrf.MaxCRYPTO)) + if err != nil { + return nil, err + } + + lenCryptoData := uint64(len(cryptoData)) + offsetCryptoData := uint64(0) + for i := uint64(0); i < numCRYPTO-1; i++ { // select n-1 times, since the last one must be the remaining + // randomly select length of CRYPTO frame. + // Length must be at least 1 byte and at most the remaining length of cryptoData minus the remaining number of CRYPTO frames. + // i.e. len in [1, len(cryptoData)-offsetCryptoData-(numCRYPTO-i-2)) + lenCRYPTO, err := cryptoSafeRandUint64(1, lenCryptoData-(numCRYPTO-i-2)) + if err != nil { + return nil, err + } + frameList = append(frameList, QUICFrameCrypto{Offset: int(offsetCryptoData), Length: int(lenCRYPTO)}) + offsetCryptoData += lenCRYPTO + lenCryptoData -= lenCRYPTO + } + + // append the last CRYPTO frame + frameList = append(frameList, QUICFrameCrypto{Offset: int(offsetCryptoData), Length: 0}) // 0 means the remaining + + // dry-run to determine the total length of all frames so far + dryrunPayload, err := frameList.Build(cryptoData) + if err != nil { + return nil, err + } + + // determine length of PADDING frames to append + lenPADDINGsigned := int64(qrf.Length) - int64(len(dryrunPayload)) + if lenPADDINGsigned > 0 { + lenPADDING := uint64(lenPADDINGsigned) + // determine number of PADDING frames to append + numPADDING, err := cryptoSafeRandUint64(uint64(qrf.MinPADDING), uint64(qrf.MaxPADDING)) + if err != nil { + return nil, err + } + + for i := uint64(0); i < numPADDING-1; i++ { // select n-1 times, since the last one must be the remaining + // randomly select length of PADDING frame. + // Length must be at least 1 byte and at most the remaining length of cryptoData minus the remaining number of CRYPTO frames. + // i.e. len in [1, lenPADDING-(numPADDING-i-2)) + lenPADDINGFrame, err := cryptoSafeRandUint64(1, lenPADDING-(numPADDING-i-2)) + if err != nil { + return nil, err + } + frameList = append(frameList, QUICFramePadding{Length: int(lenPADDINGFrame)}) + lenPADDING -= lenPADDINGFrame + } + + // append the last CRYPTO frame + frameList = append(frameList, QUICFramePadding{Length: int(lenPADDING)}) // 0 means the remaining + } + + // shuffle the frameList + mrand.Shuffle(len(frameList), func(i, j int) { + frameList[i], frameList[j] = frameList[j], frameList[i] + }) + + // build the payload + return frameList.Build(cryptoData) +} diff --git a/backend/vendor/github.com/enetx/uquic/u_quic_spec.go b/backend/vendor/github.com/enetx/uquic/u_quic_spec.go new file mode 100644 index 0000000..a9b17bb --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/u_quic_spec.go @@ -0,0 +1,27 @@ +package quic + +import tls "github.com/enetx/utls" + +const ( + DefaultUDPDatagramMinSize = 1200 +) + +type QUICSpec struct { + // InitialPacketSpec specifies the QUIC Initial Packet, which includes Initial + // Packet Headers and Frames. + InitialPacketSpec InitialPacketSpec + + // ClientHelloSpec specifies the TLS ClientHello to be sent in the first Initial + // Packet. It is implemented by the uTLS library and a valid ClientHelloSpec + // for QUIC MUST include (utls).QUICTransportParametersExtension. + ClientHelloSpec *tls.ClientHelloSpec + + // UDPDatagramMinSize specifies the minimum size of the UDP Datagram (UDP payload). + // If the UDP Datagram is smaller than this size, zeros will be padded to the end + // of the UDP Datagram until this size is reached. + UDPDatagramMinSize int +} + +func (s *QUICSpec) UpdateConfig(config *Config) { + s.InitialPacketSpec.UpdateConfig(config) +} diff --git a/backend/vendor/github.com/enetx/uquic/u_transport.go b/backend/vendor/github.com/enetx/uquic/u_transport.go new file mode 100644 index 0000000..04c7aef --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/u_transport.go @@ -0,0 +1,66 @@ +package quic + +import ( + "context" + "net" + + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/utils" + tls "github.com/enetx/utls" +) + +type UTransport struct { + *Transport + + QUICSpec *QUICSpec // [UQUIC] using ptr to avoid copying +} + +// Dial dials a new connection to a remote host (not using 0-RTT). +func (t *UTransport) Dial(ctx context.Context, addr net.Addr, tlsConf *tls.Config, conf *Config) (Connection, error) { + return t.dial(ctx, addr, "", tlsConf, conf, false) +} + +// DialEarly dials a new connection, attempting to use 0-RTT if possible. +func (t *UTransport) DialEarly(ctx context.Context, addr net.Addr, tlsConf *tls.Config, conf *Config) (EarlyConnection, error) { + return t.dial(ctx, addr, "", tlsConf, conf, true) +} + +func (t *UTransport) dial(ctx context.Context, addr net.Addr, host string, tlsConf *tls.Config, conf *Config, use0RTT bool) (EarlyConnection, error) { + if err := validateConfig(conf); err != nil { + return nil, err + } + conf = populateConfig(conf) + + // [UQUIC] + // Override the default connection ID generator if the user has specified a length in QUICSpec. + if t.QUICSpec != nil { + if t.QUICSpec.InitialPacketSpec.SrcConnIDLength != 0 { + t.ConnectionIDGenerator = &protocol.DefaultConnectionIDGenerator{ConnLen: t.QUICSpec.InitialPacketSpec.SrcConnIDLength} + } else { + t.ConnectionIDGenerator = &protocol.ExpEmptyConnectionIDGenerator{} + } + } + // [/UQUIC] + + if err := t.init(t.isSingleUse); err != nil { + return nil, err + } + var onClose func() + if t.isSingleUse { + onClose = func() { t.Close() } + } + tlsConf = tlsConf.Clone() + tlsConf.MinVersion = tls.VersionTLS13 + setTLSConfigServerName(tlsConf, addr, host) + return udial(ctx, newSendConn(t.conn, addr, packetInfo{}, utils.DefaultLogger), t.connIDGenerator, t.handlerMap, tlsConf, conf, onClose, use0RTT, t.QUICSpec) +} + +func (ut *UTransport) MakeDialer() func(ctx context.Context, addr string, tlsCfg *tls.Config, cfg *Config) (EarlyConnection, error) { + return func(ctx context.Context, addr string, tlsCfg *tls.Config, cfg *Config) (EarlyConnection, error) { + udpAddr, err := net.ResolveUDPAddr("udp", addr) + if err != nil { + return nil, err + } + return ut.DialEarly(ctx, udpAddr, tlsCfg, cfg) + } +} diff --git a/backend/vendor/github.com/enetx/uquic/window_update_queue.go b/backend/vendor/github.com/enetx/uquic/window_update_queue.go new file mode 100644 index 0000000..649f842 --- /dev/null +++ b/backend/vendor/github.com/enetx/uquic/window_update_queue.go @@ -0,0 +1,71 @@ +package quic + +import ( + "sync" + + "github.com/enetx/uquic/internal/flowcontrol" + "github.com/enetx/uquic/internal/protocol" + "github.com/enetx/uquic/internal/wire" +) + +type windowUpdateQueue struct { + mutex sync.Mutex + + queue map[protocol.StreamID]struct{} // used as a set + queuedConn bool // connection-level window update + + streamGetter streamGetter + connFlowController flowcontrol.ConnectionFlowController + callback func(wire.Frame) +} + +func newWindowUpdateQueue( + streamGetter streamGetter, + connFC flowcontrol.ConnectionFlowController, + cb func(wire.Frame), +) *windowUpdateQueue { + return &windowUpdateQueue{ + queue: make(map[protocol.StreamID]struct{}), + streamGetter: streamGetter, + connFlowController: connFC, + callback: cb, + } +} + +func (q *windowUpdateQueue) AddStream(id protocol.StreamID) { + q.mutex.Lock() + q.queue[id] = struct{}{} + q.mutex.Unlock() +} + +func (q *windowUpdateQueue) AddConnection() { + q.mutex.Lock() + q.queuedConn = true + q.mutex.Unlock() +} + +func (q *windowUpdateQueue) QueueAll() { + q.mutex.Lock() + // queue a connection-level window update + if q.queuedConn { + q.callback(&wire.MaxDataFrame{MaximumData: q.connFlowController.GetWindowUpdate()}) + q.queuedConn = false + } + // queue all stream-level window updates + for id := range q.queue { + delete(q.queue, id) + str, err := q.streamGetter.GetOrOpenReceiveStream(id) + if err != nil || str == nil { // the stream can be nil if it was completed before dequeing the window update + continue + } + offset := str.getWindowUpdate() + if offset == 0 { // can happen if we received a final offset, right after queueing the window update + continue + } + q.callback(&wire.MaxStreamDataFrame{ + StreamID: id, + MaximumStreamData: offset, + }) + } + q.mutex.Unlock() +} diff --git a/backend/vendor/github.com/enetx/utls/.travis.yml b/backend/vendor/github.com/enetx/utls/.travis.yml new file mode 100644 index 0000000..0069725 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/.travis.yml @@ -0,0 +1,19 @@ +language: go + +go: + - "1.11.x" + +sudo: required +dist: trusty + +install: + - go get -t ./... + - go get golang.org/x/lint/golint + # Install gometalinter + - go get github.com/alecthomas/gometalinter + +script: + - go test -race -v . + - gometalinter --install + - gometalinter --disable-all -E vet -E ineffassign --tests . + - gometalinter --disable-all -E gofmt -E misspell -E goimports --tests u_* diff --git a/backend/vendor/github.com/enetx/utls/CONTRIBUTING.md b/backend/vendor/github.com/enetx/utls/CONTRIBUTING.md new file mode 100644 index 0000000..6d364e1 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/CONTRIBUTING.md @@ -0,0 +1,23 @@ +# How to Contribute + +We'd love to accept your patches and contributions to this project. There are +just a few small guidelines you need to follow. + +## Contributor License Agreement + +Contributions to this project must be accompanied by a Contributor License +Agreement. You (or your employer) retain the copyright to your contribution, +this simply gives us permission to use and redistribute your contributions as +part of the project. Head over to to see +your current agreements on file or to sign a new one. + +You generally only need to submit a CLA once, so if you've already submitted one +(even if it was for a different project), you probably don't need to do it +again. + +## Code reviews + +All submissions, including submissions by project members, require review. We +use GitHub pull requests for this purpose. Consult +[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more +information on using pull requests. \ No newline at end of file diff --git a/backend/vendor/github.com/enetx/utls/CONTRIBUTORS_GUIDE.md b/backend/vendor/github.com/enetx/utls/CONTRIBUTORS_GUIDE.md new file mode 100644 index 0000000..7dcfb2d --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/CONTRIBUTORS_GUIDE.md @@ -0,0 +1,69 @@ +# How this package works +### Chapter 1: [Making private things public](./u_public.go) +There are numerous handshake-related structs in crypto/tls, most of which are either private or have private fields. +One of them — `clientHandshakeState` — has private function `handshake()`, +which is called in the beginning of default handshake. +Unfortunately, user will not be able to directly access this struct outside of tls package. +As a result, we decided to employ following workaround: declare public copies of private structs. +Now user is free to manipulate fields of public `ClientHandshakeState`. +Then, right before handshake, we can shallow-copy public state into private `clientHandshakeState`, +call `handshake()` on it and carry on with default Golang handshake process. +After handshake is done we shallow-copy private state back to public, allowing user to read results of handshake. + +### Chapter 2: [TLSExtension](./u_tls_extensions.go) +The way we achieve reasonable flexibilty with extensions is inspired by +[ztls'](https://github.com/zmap/zcrypto/blob/master/tls/handshake_extensions.go) design. +However, our design has several differences, so we wrote it from scratch. +This design allows us to have an array of `TLSExtension` objects and then marshal them in order: +```Golang +type TLSExtension interface { + writeToUConn(*UConn) error + + Len() int // includes header + + // Read reads up to len(p) bytes into p. + // It returns the number of bytes read (0 <= n <= len(p)) and any error encountered. + Read(p []byte) (n int, err error) // implements io.Reader +} +``` +`writeToUConn()` applies appropriate per-extension changes to `UConn`. + +`Len()` provides the size of marshaled extension, so we can allocate appropriate buffer beforehand, +catch out-of-bound errors easily and guide size-dependent extensions such as padding. + +`Read(buffer []byte)` _writes(see: io.Reader interface)_ marshaled extensions into provided buffer. +This avoids extra allocations. + +### Chapter 3: [UConn](./u_conn.go) +`UConn` extends standard `tls.Conn`. Most notably, it stores slice with `TLSExtension`s and public +`ClientHandshakeState`. +Whenever `UConn.BuildHandshakeState()` gets called (happens automatically in `UConn.Handshake()` +or could be called manually), config will be applied according to chosen `ClientHelloID`. +From contributor's view there are 2 main behaviors: + * `HelloGolang` simply calls default Golang's [`makeClientHello()`](./handshake_client.go) + and directly stores it into `HandshakeState.Hello`. utls-specific stuff is ignored. + * Other ClientHelloIDs fill `UConn.Hello.{Random, CipherSuites, CompressionMethods}` and `UConn.Extensions` with +per-parrot setup, which then gets applied to appropriate standard tls structs, +and then marshaled by utls into `HandshakeState.Hello`. + +### Chapter 4: Tests + +Tests exist, but coverage is very limited. What's covered is a conjunction of + * TLS 1.2 + * Working parrots without any unsupported extensions (only Android 5.1 at this time) + * Ciphersuites offered by parrot. + * Ciphersuites supported by Golang + * Simple conversation with reference implementation of OpenSSL. +(e.g. no automatic checks for renegotiations, parroting quality and such) + +plus we test some other minor things. +Basically, current tests aim to provide a sanity check. + +# Merging upstream +```Bash +git remote add -f golang git@github.com:golang/go.git +git checkout -b golang-upstream golang/master +git subtree split -P src/crypto/tls/ -b golang-tls-upstream +git checkout master +git merge --no-commit golang-tls-upstream +``` diff --git a/backend/vendor/github.com/enetx/utls/LICENSE b/backend/vendor/github.com/enetx/utls/LICENSE new file mode 100644 index 0000000..6a66aea --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/LICENSE @@ -0,0 +1,27 @@ +Copyright (c) 2009 The Go Authors. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/backend/vendor/github.com/enetx/utls/README.md b/backend/vendor/github.com/enetx/utls/README.md new file mode 100644 index 0000000..96f265d --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/README.md @@ -0,0 +1,315 @@ +# ![uTLS](logo_small.png) uTLS +[![Build Status](https://github.com/enetx/utls/actions/workflows/go.yml/badge.svg?branch=master)](https://github.com/enetx/utls/actions/workflows/go.yml) +[![godoc](https://img.shields.io/badge/godoc-reference-blue.svg)](https://godoc.org/github.com/enetx/utls#UConn) +--- +uTLS is a fork of "crypto/tls", which provides ClientHello fingerprinting resistance, low-level access to handshake, fake session tickets and some other features. Handshake is still performed by "crypto/tls", this library merely changes ClientHello part of it and provides low-level access. + +**Minimum Go Version**: Go 1.21 + +If you have any questions, bug reports or contributions, you are welcome to publish those on GitHub. If you want to do so in private, ~~you can contact one of developers personally via sergey.frolov@colorado.edu~~. + +You can contact one of developers personally via gaukas.wang@colorado.edu. + +Documentation below may not keep up with all the changes and new features at all times, +so you are encouraged to use [godoc](https://godoc.org/github.com/enetx/utls#UConn). + +*Note: Information provided below in this README.md could be obsolete. We welcome +any contributions to refresh the documentations in addition to code contributions.* + +# Features +## Low-level access to handshake +* Read/write access to all bits of client hello message. +* Read access to fields of ClientHandshakeState, which, among other things, includes ServerHello and MasterSecret. +* Read keystream. Can be used, for example, to "write" something in ciphertext. + +## ClientHello fingerprinting resistance +Golang's ClientHello has a very unique fingerprint, which especially sticks out on mobile clients, +where Golang is not too popular yet. +Some members of anti-censorship community are concerned that their tools could be trivially blocked based on +ClientHello with relatively small collateral damage. There are multiple solutions to this issue. + +**It is highly recommended to use multiple fingeprints, including randomized ones to avoid relying on a single fingerprint.** +[utls.Roller](#roller) does this automatically. + +### Randomized Fingerprint +Randomized Fingerprints are supposedly good at defeating blacklists, since +those fingerprints have random ciphersuites and extensions in random order. +Note that all used ciphersuites and extensions are fully supported by uTLS, +which provides a solid moving target without any compatibility or parrot-is-dead attack risks. + +But note that there's a small chance that generated fingerprint won't work, +so you may want to keep generating until a working one is found, +and then keep reusing the working fingerprint to avoid suspicious behavior of constantly changing fingerprints. +[utls.Roller](#roller) reuses working fingerprint automatically. + +#### Generating randomized fingerprints + +To generate a randomized fingerprint, simply do: +```Golang +uTlsConn := tls.UClient(tcpConn, &config, tls.HelloRandomized) +``` +you can use `helloRandomizedALPN` or `helloRandomizedNoALPN` to ensure presence or absence of +ALPN(Application-Layer Protocol Negotiation) extension. +It is recommended, but certainly not required to include ALPN (or use helloRandomized which may or may not include ALPN). +If you do use ALPN, you will want to correctly handle potential application layer protocols (likely h2 or http/1.1). + +#### Reusing randomized fingerprint +```Golang +// oldConn is an old connection that worked before, so we want to reuse it +// newConn is a new connection we'd like to establish +newConn := tls.UClient(tcpConn, &config, oldConn.ClientHelloID) +``` + +### Parroting +This package can be used to parrot ClientHello of popular browsers. +There are some caveats to this parroting: +* We are forced to offer ciphersuites and tls extensions that are not supported by crypto/tls. +This is not a problem, if you fully control the server and turn unsupported things off on server side. +* Parroting could be imperfect, and there is no parroting beyond ClientHello. +#### Compatibility risks of available parrots + +| Parrot | Ciphers* | Signature* | Unsupported extensions | TLS Fingerprint ID | +| ------------- | -------- | ---------- | ---------------------- | --------------------------------------------- | +| Chrome 62 | no | no | ChannelID | [0a4a74aeebd1bb66](https://tlsfingerprint.io/id/0a4a74aeebd1bb66) | +| Chrome 70 | no | no | ChannelID, Encrypted Certs | [bc4c7e42f4961cd7](https://tlsfingerprint.io/id/bc4c7e42f4961cd7) | +| Chrome 72 | no | no | ChannelID, Encrypted Certs | [bbf04e5f1881f506](https://tlsfingerprint.io/id/bbf04e5f1881f506) | +| Chrome 83 | no | no | ChannelID, Encrypted Certs | [9c673fd64a32c8dc](https://tlsfingerprint.io/id/9c673fd64a32c8dc) | +| Firefox 56 | very low | no | None | [c884bad7f40bee56](https://tlsfingerprint.io/id/c884bad7f40bee56) | +| Firefox 65 | very low | no | MaxRecordSize | [6bfedc5d5c740d58](https://tlsfingerprint.io/id/6bfedc5d5c740d58) | +| iOS 11.1 | low** | no | None | [71a81bafd58e1301](https://tlsfingerprint.io/id/71a81bafd58e1301) | +| iOS 12.1 | low** | no | None | [ec55e5b4136c7949](https://tlsfingerprint.io/id/ec55e5b4136c7949) | + +\* Denotes very rough guesstimate of likelihood that unsupported things will get echoed back by the server in the wild, +*visibly breaking the connection*. +\*\* No risk, if `utls.EnableWeakCiphers()` is called prior to using it. + +#### Parrots FAQ +> Does it really look like, say, Google Chrome with all the [GREASE](https://tools.ietf.org/html/draft-davidben-tls-grease-01) and stuff? + +It LGTM, but please open up Wireshark and check. If you see something — [say something](https://github.com/enetx/utls/issues). + +> Aren't there side channels? Everybody knows that the ~~bird is a word~~[parrot is dead](https://people.cs.umass.edu/~amir/papers/parrot.pdf) + +There sure are. If you found one that approaches practicality at line speed — [please tell us](https://github.com/enetx/utls/issues). + +However, there is a difference between this sort of parroting and techniques like SkypeMorth. +Namely, TLS is highly standardized protocol, therefore simply not that many subtle things in TLS protocol +could be different and/or suddenly change in one of mimicked implementation(potentially undermining the mimicry). +It is possible that we have a distinguisher right now, but amount of those potential distinguishers is limited. + +### Custom Handshake +It is possible to create custom handshake by +1) Use `HelloCustom` as an argument for `UClient()` to get empty config +2) Fill tls header fields: UConn.Hello.{Random, CipherSuites, CompressionMethods}, if needed, or stick to defaults. +3) Configure and add various [TLS Extensions](u_tls_extensions.go) to UConn.Extensions: they will be marshaled in order. +4) Set Session and SessionCache, as needed. + +If you need to manually control all the bytes on the wire(certainly not recommended!), +you can set UConn.HandshakeStateBuilt = true, and marshal clientHello into UConn.HandshakeState.Hello.raw yourself. +In this case you will be responsible for modifying other parts of Config and ClientHelloMsg to reflect your setup +and not confuse "crypto/tls", which will be processing response from server. + +### Fingerprinting Captured Client Hello +You can use a captured client hello to generate new ones that mimic/have the same properties as the original. +The generated client hellos _should_ look like they were generated from the same client software as the original fingerprinted bytes. +In order to do this: +1) Create a `ClientHelloSpec` from the raw bytes of the original client hello +2) Use `HelloCustom` as an argument for `UClient()` to get empty config +3) Use `ApplyPreset` with the generated `ClientHelloSpec` to set the appropriate connection properties +``` +uConn := UClient(&net.TCPConn{}, nil, HelloCustom) +fingerprinter := &Fingerprinter{} +generatedSpec, err := fingerprinter.FingerprintClientHello(rawCapturedClientHelloBytes) +if err != nil { + panic("fingerprinting failed: %v", err) +} +if err := uConn.ApplyPreset(generatedSpec); err != nil { + panic("applying generated spec failed: %v", err) +} +``` +The `rawCapturedClientHelloBytes` should be the full tls record, including the record type/version/length header. + +## Roller + +A simple wrapper, that allows to easily use multiple latest(auto-updated) fingerprints. + +```Golang +// NewRoller creates Roller object with default range of HelloIDs to cycle +// through until a working/unblocked one is found. +func NewRoller() (*Roller, error) +``` + +```Golang +// Dial attempts to connect to given address using different HelloIDs. +// If a working HelloID is found, it is used again for subsequent Dials. +// If tcp connection fails or all HelloIDs are tried, returns with last error. +// +// Usage examples: +// +// Dial("tcp4", "google.com:443", "google.com") +// Dial("tcp", "10.23.144.22:443", "mywebserver.org") +func (c *Roller) Dial(network, addr, serverName string) (*UConn, error) +``` + +## Fake Session Tickets +Fake session tickets is a very nifty trick that allows power users to hide parts of handshake, which may have some very fingerprintable features of handshake, and saves 1 RTT. +Currently, there is a simple function to set session ticket to any desired state: + +```Golang +// If you want you session tickets to be reused - use same cache on following connections +func (uconn *UConn) SetSessionState(session *ClientSessionState) +``` + +Note that session tickets (fake ones or otherwise) are not reused. +To reuse tickets, create a shared cache and set it on current and further configs: + +```Golang +// If you want you session tickets to be reused - use same cache on following connections +func (uconn *UConn) SetSessionCache(cache ClientSessionCache) +``` + +## Custom TLS extensions +If you want to add your own fake (placeholder, without added functionality) extension for mimicry purposes, you can embed `*tls.GenericExtension` into your own struct and override `Len()` and `Read()` methods. For example, [DelegatedCredentials](https://datatracker.ietf.org/doc/draft-ietf-tls-subcerts/) extension can be implemented as follows: + +```Golang +const FakeDelegatedCredentials uint16 = 0x0022 + +type FakeDelegatedCredentialsExtension struct { + *tls.GenericExtension + SignatureAlgorithms []tls.SignatureScheme +} + +func (e *FakeDelegatedCredentialsExtension) Len() int { + return 6 + 2*len(e.SignatureAlgorithms) +} + +func (e *FakeDelegatedCredentialsExtension) Read(b []byte) (n int, err error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + offset := 0 + appendUint16 := func(val uint16) { + b[offset] = byte(val >> 8) + b[offset+1] = byte(val & 0xff) + offset += 2 + } + + // Extension type + appendUint16(FakeDelegatedCredentials) + + algosLength := 2 * len(e.SignatureAlgorithms) + + // Extension data length + appendUint16(uint16(algosLength) + 2) + + // Algorithms list length + appendUint16(uint16(algosLength)) + + // Algorithms list + for _, a := range e.SignatureAlgorithms { + appendUint16(uint16(a)) + } + return e.Len(), io.EOF +} +``` + +Then it can be used just like normal extension: + +```Golang +&tls.ClientHelloSpec{ + //... + Extensions: []tls.TLSExtension{ + //... + &FakeDelegatedCredentialsExtension{ + SignatureAlgorithms: []tls.SignatureScheme{ + tls.ECDSAWithP256AndSHA256, + tls.ECDSAWithP384AndSHA384, + tls.ECDSAWithP521AndSHA512, + tls.ECDSAWithSHA1, + }, + }, + //... + } + //... +} +``` + +# Client Hello IDs +See full list of `clientHelloID` values [here](https://godoc.org/github.com/enetx/utls#ClientHelloID). +There are different behaviors you can get, depending on your `clientHelloID`: + +1. ```utls.HelloRandomized``` adds/reorders extensions, ciphersuites, etc. randomly. +`HelloRandomized` adds ALPN in a percentage of cases, you may want to use `HelloRandomizedALPN` or +`HelloRandomizedNoALPN` to choose specific behavior explicitly, as ALPN might affect application layer. +2. ```utls.HelloGolang``` + HelloGolang will use default "crypto/tls" handshake marshaling codepath, which WILL + overwrite your changes to Hello(Config, Session are fine). + You might want to call BuildHandshakeState() before applying any changes. + UConn.Extensions will be completely ignored. +3. ```utls.HelloCustom``` +will prepare ClientHello with empty uconn.Extensions so you can fill it with TLSExtension's manually. +4. The rest will will parrot given browser. Such parrots include, for example: + * `utls.HelloChrome_Auto`- parrots recommended(usually latest) Google Chrome version + * `utls.HelloChrome_58` - parrots Google Chrome 58 + * `utls.HelloFirefox_Auto` - parrots recommended(usually latest) Firefox version + * `utls.HelloFirefox_55` - parrots Firefox 55 + +# Usage +## Examples +Find basic examples [here](examples/examples.go). +Here's a more [advanced example](https://github.com/sergeyfrolov/gotapdance/blob//9a777f35a04b0c4c5dacd30bca0e9224eb737b5e/tapdance/conn_raw.go#L275-L292) showing how to generate randomized ClientHello, modify generated ciphersuites a bit, and proceed with the handshake. +### Migrating from "crypto/tls" +Here's how default "crypto/tls" is typically used: +```Golang + dialConn, err := net.Dial("tcp", "172.217.11.46:443") + if err != nil { + fmt.Printf("net.Dial() failed: %+v\n", err) + return + } + + config := tls.Config{ServerName: "www.google.com"} + tlsConn := tls.Client(dialConn, &config) + n, err = tlsConn.Write("Hello, World!") + //... +``` +To start using using uTLS: +1. Import this library (e.g. `import tls "github.com/enetx/utls"`) +2. Pick the [Client Hello ID](#client-hello-ids) +3. Simply substitute `tlsConn := tls.Client(dialConn, &config)` +with `tlsConn := tls.UClient(dialConn, &config, tls.clientHelloID)` + +### Customizing handshake +Some customizations(such as setting session ticket/clientHello) have easy-to-use functions for them. The idea is to make common manipulations easy: +```Golang + cRandom := []byte{100, 101, 102, 103, 104, 105, 106, 107, 108, 109, + 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, + 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, + 130, 131} + tlsConn.SetClientRandom(cRandom) + masterSecret := make([]byte, 48) + copy(masterSecret, []byte("masterSecret is NOT sent over the wire")) // you may use it for real security + + // Create a session ticket that wasn't actually issued by the server. + sessionState := utls.MakeClientSessionState(sessionTicket, uint16(tls.VersionTLS12), + tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + masterSecret, + nil, nil) + tlsConn.SetSessionState(sessionState) +``` + +For other customizations there are following functions +``` +// you can use this to build the state manually and change it +// for example use Randomized ClientHello, and add more extensions +func (uconn *UConn) BuildHandshakeState() error +``` +``` +// Then apply the changes and marshal final bytes, which will be sent +func (uconn *UConn) MarshalClientHello() error +``` + +## Contributors' guide +Please refer to [this document](./CONTRIBUTORS_GUIDE.md) if you're interested in internals + +## Credits +The initial development of uTLS was completed during an internship at [Google Jigsaw](https://jigsaw.google.com/). This is not an official Google product. diff --git a/backend/vendor/github.com/enetx/utls/SECURITY.md b/backend/vendor/github.com/enetx/utls/SECURITY.md new file mode 100644 index 0000000..ef16778 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/SECURITY.md @@ -0,0 +1,11 @@ +# Security Policy + +## Supported Versions + +We will only maintain one branch which is the master branch. Unless otherwise requested, no security patches will be applied to older Major/Minor versions. + +## Reporting a Vulnerability + +For a vulnerability of low to no severity, which causing no threats to security, you may report it openly to us by [opening an issue](https://github.com/enetx/utls/issues/new) + +If the vulnerability you are reporting inflicts some security impact, please [do so privately](https://github.com/enetx/utls/security/advisories/new). diff --git a/backend/vendor/github.com/enetx/utls/alert.go b/backend/vendor/github.com/enetx/utls/alert.go new file mode 100644 index 0000000..2301c06 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/alert.go @@ -0,0 +1,111 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import "strconv" + +// An AlertError is a TLS alert. +// +// When using a QUIC transport, QUICConn methods will return an error +// which wraps AlertError rather than sending a TLS alert. +type AlertError uint8 + +func (e AlertError) Error() string { + return alert(e).String() +} + +type alert uint8 + +const ( + // alert level + alertLevelWarning = 1 + alertLevelError = 2 +) + +const ( + alertCloseNotify alert = 0 + alertUnexpectedMessage alert = 10 + alertBadRecordMAC alert = 20 + alertDecryptionFailed alert = 21 + alertRecordOverflow alert = 22 + alertDecompressionFailure alert = 30 + alertHandshakeFailure alert = 40 + alertBadCertificate alert = 42 + alertUnsupportedCertificate alert = 43 + alertCertificateRevoked alert = 44 + alertCertificateExpired alert = 45 + alertCertificateUnknown alert = 46 + alertIllegalParameter alert = 47 + alertUnknownCA alert = 48 + alertAccessDenied alert = 49 + alertDecodeError alert = 50 + alertDecryptError alert = 51 + alertExportRestriction alert = 60 + alertProtocolVersion alert = 70 + alertInsufficientSecurity alert = 71 + alertInternalError alert = 80 + alertInappropriateFallback alert = 86 + alertUserCanceled alert = 90 + alertNoRenegotiation alert = 100 + alertMissingExtension alert = 109 + alertUnsupportedExtension alert = 110 + alertCertificateUnobtainable alert = 111 + alertUnrecognizedName alert = 112 + alertBadCertificateStatusResponse alert = 113 + alertBadCertificateHashValue alert = 114 + alertUnknownPSKIdentity alert = 115 + alertCertificateRequired alert = 116 + alertNoApplicationProtocol alert = 120 + alertECHRequired alert = 121 +) + +var alertText = map[alert]string{ + alertCloseNotify: "close notify", + alertUnexpectedMessage: "unexpected message", + alertBadRecordMAC: "bad record MAC", + alertDecryptionFailed: "decryption failed", + alertRecordOverflow: "record overflow", + alertDecompressionFailure: "decompression failure", + alertHandshakeFailure: "handshake failure", + alertBadCertificate: "bad certificate", + alertUnsupportedCertificate: "unsupported certificate", + alertCertificateRevoked: "revoked certificate", + alertCertificateExpired: "expired certificate", + alertCertificateUnknown: "unknown certificate", + alertIllegalParameter: "illegal parameter", + alertUnknownCA: "unknown certificate authority", + alertAccessDenied: "access denied", + alertDecodeError: "error decoding message", + alertDecryptError: "error decrypting message", + alertExportRestriction: "export restriction", + alertProtocolVersion: "protocol version not supported", + alertInsufficientSecurity: "insufficient security level", + alertInternalError: "internal error", + alertInappropriateFallback: "inappropriate fallback", + alertUserCanceled: "user canceled", + alertNoRenegotiation: "no renegotiation", + alertMissingExtension: "missing extension", + alertUnsupportedExtension: "unsupported extension", + alertCertificateUnobtainable: "certificate unobtainable", + alertUnrecognizedName: "unrecognized name", + alertBadCertificateStatusResponse: "bad certificate status response", + alertBadCertificateHashValue: "bad certificate hash value", + alertUnknownPSKIdentity: "unknown PSK identity", + alertCertificateRequired: "certificate required", + alertNoApplicationProtocol: "no application protocol", + alertECHRequired: "encrypted client hello required", +} + +func (e alert) String() string { + s, ok := alertText[e] + if ok { + return "tls: " + s + } + return "tls: alert(" + strconv.Itoa(int(e)) + ")" +} + +func (e alert) Error() string { + return e.String() +} diff --git a/backend/vendor/github.com/enetx/utls/auth.go b/backend/vendor/github.com/enetx/utls/auth.go new file mode 100644 index 0000000..998deb9 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/auth.go @@ -0,0 +1,295 @@ +// Copyright 2017 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bytes" + "crypto" + "crypto/ecdsa" + "crypto/ed25519" + "crypto/elliptic" + "crypto/rsa" + "errors" + "fmt" + "hash" + "io" +) + +// verifyHandshakeSignature verifies a signature against pre-hashed +// (if required) handshake contents. +func verifyHandshakeSignature(sigType uint8, pubkey crypto.PublicKey, hashFunc crypto.Hash, signed, sig []byte) error { + switch sigType { + case signatureECDSA: + pubKey, ok := pubkey.(*ecdsa.PublicKey) + if !ok { + return fmt.Errorf("expected an ECDSA public key, got %T", pubkey) + } + if !ecdsa.VerifyASN1(pubKey, signed, sig) { + return errors.New("ECDSA verification failure") + } + case signatureEd25519: + pubKey, ok := pubkey.(ed25519.PublicKey) + if !ok { + return fmt.Errorf("expected an Ed25519 public key, got %T", pubkey) + } + if !ed25519.Verify(pubKey, signed, sig) { + return errors.New("Ed25519 verification failure") + } + case signaturePKCS1v15: + pubKey, ok := pubkey.(*rsa.PublicKey) + if !ok { + return fmt.Errorf("expected an RSA public key, got %T", pubkey) + } + if err := rsa.VerifyPKCS1v15(pubKey, hashFunc, signed, sig); err != nil { + return err + } + case signatureRSAPSS: + pubKey, ok := pubkey.(*rsa.PublicKey) + if !ok { + return fmt.Errorf("expected an RSA public key, got %T", pubkey) + } + signOpts := &rsa.PSSOptions{SaltLength: rsa.PSSSaltLengthEqualsHash} + if err := rsa.VerifyPSS(pubKey, hashFunc, signed, sig, signOpts); err != nil { + return err + } + default: + return errors.New("internal error: unknown signature type") + } + return nil +} + +const ( + serverSignatureContext = "TLS 1.3, server CertificateVerify\x00" + clientSignatureContext = "TLS 1.3, client CertificateVerify\x00" +) + +var signaturePadding = []byte{ + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, +} + +// signedMessage returns the pre-hashed (if necessary) message to be signed by +// certificate keys in TLS 1.3. See RFC 8446, Section 4.4.3. +func signedMessage(sigHash crypto.Hash, context string, transcript hash.Hash) []byte { + if sigHash == directSigning { + b := &bytes.Buffer{} + b.Write(signaturePadding) + io.WriteString(b, context) + b.Write(transcript.Sum(nil)) + return b.Bytes() + } + h := sigHash.New() + h.Write(signaturePadding) + io.WriteString(h, context) + h.Write(transcript.Sum(nil)) + return h.Sum(nil) +} + +// typeAndHashFromSignatureScheme returns the corresponding signature type and +// crypto.Hash for a given TLS SignatureScheme. +func typeAndHashFromSignatureScheme(signatureAlgorithm SignatureScheme) (sigType uint8, hash crypto.Hash, err error) { + switch signatureAlgorithm { + case PKCS1WithSHA1, PKCS1WithSHA256, PKCS1WithSHA384, PKCS1WithSHA512: + sigType = signaturePKCS1v15 + case PSSWithSHA256, PSSWithSHA384, PSSWithSHA512: + sigType = signatureRSAPSS + case ECDSAWithSHA1, ECDSAWithP256AndSHA256, ECDSAWithP384AndSHA384, ECDSAWithP521AndSHA512: + sigType = signatureECDSA + case Ed25519: + sigType = signatureEd25519 + default: + return 0, 0, fmt.Errorf("unsupported signature algorithm: %v", signatureAlgorithm) + } + switch signatureAlgorithm { + case PKCS1WithSHA1, ECDSAWithSHA1: + hash = crypto.SHA1 + case PKCS1WithSHA256, PSSWithSHA256, ECDSAWithP256AndSHA256: + hash = crypto.SHA256 + case PKCS1WithSHA384, PSSWithSHA384, ECDSAWithP384AndSHA384: + hash = crypto.SHA384 + case PKCS1WithSHA512, PSSWithSHA512, ECDSAWithP521AndSHA512: + hash = crypto.SHA512 + case Ed25519: + hash = directSigning + default: + return 0, 0, fmt.Errorf("unsupported signature algorithm: %v", signatureAlgorithm) + } + return sigType, hash, nil +} + +// legacyTypeAndHashFromPublicKey returns the fixed signature type and crypto.Hash for +// a given public key used with TLS 1.0 and 1.1, before the introduction of +// signature algorithm negotiation. +func legacyTypeAndHashFromPublicKey(pub crypto.PublicKey) (sigType uint8, hash crypto.Hash, err error) { + switch pub.(type) { + case *rsa.PublicKey: + return signaturePKCS1v15, crypto.MD5SHA1, nil + case *ecdsa.PublicKey: + return signatureECDSA, crypto.SHA1, nil + case ed25519.PublicKey: + // RFC 8422 specifies support for Ed25519 in TLS 1.0 and 1.1, + // but it requires holding on to a handshake transcript to do a + // full signature, and not even OpenSSL bothers with the + // complexity, so we can't even test it properly. + return 0, 0, fmt.Errorf("tls: Ed25519 public keys are not supported before TLS 1.2") + default: + return 0, 0, fmt.Errorf("tls: unsupported public key: %T", pub) + } +} + +var rsaSignatureSchemes = []struct { + scheme SignatureScheme + minModulusBytes int + maxVersion uint16 +}{ + // RSA-PSS is used with PSSSaltLengthEqualsHash, and requires + // emLen >= hLen + sLen + 2 + {PSSWithSHA256, crypto.SHA256.Size()*2 + 2, VersionTLS13}, + {PSSWithSHA384, crypto.SHA384.Size()*2 + 2, VersionTLS13}, + {PSSWithSHA512, crypto.SHA512.Size()*2 + 2, VersionTLS13}, + // PKCS #1 v1.5 uses prefixes from hashPrefixes in crypto/rsa, and requires + // emLen >= len(prefix) + hLen + 11 + // TLS 1.3 dropped support for PKCS #1 v1.5 in favor of RSA-PSS. + {PKCS1WithSHA256, 19 + crypto.SHA256.Size() + 11, VersionTLS12}, + {PKCS1WithSHA384, 19 + crypto.SHA384.Size() + 11, VersionTLS12}, + {PKCS1WithSHA512, 19 + crypto.SHA512.Size() + 11, VersionTLS12}, + {PKCS1WithSHA1, 15 + crypto.SHA1.Size() + 11, VersionTLS12}, +} + +// signatureSchemesForCertificate returns the list of supported SignatureSchemes +// for a given certificate, based on the public key and the protocol version, +// and optionally filtered by its explicit SupportedSignatureAlgorithms. +// +// This function must be kept in sync with supportedSignatureAlgorithms. +// FIPS filtering is applied in the caller, selectSignatureScheme. +func signatureSchemesForCertificate(version uint16, cert *Certificate) []SignatureScheme { + priv, ok := cert.PrivateKey.(crypto.Signer) + if !ok { + return nil + } + + var sigAlgs []SignatureScheme + switch pub := priv.Public().(type) { + case *ecdsa.PublicKey: + if version != VersionTLS13 { + // In TLS 1.2 and earlier, ECDSA algorithms are not + // constrained to a single curve. + sigAlgs = []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + ECDSAWithSHA1, + } + break + } + switch pub.Curve { + case elliptic.P256(): + sigAlgs = []SignatureScheme{ECDSAWithP256AndSHA256} + case elliptic.P384(): + sigAlgs = []SignatureScheme{ECDSAWithP384AndSHA384} + case elliptic.P521(): + sigAlgs = []SignatureScheme{ECDSAWithP521AndSHA512} + default: + return nil + } + case *rsa.PublicKey: + size := pub.Size() + sigAlgs = make([]SignatureScheme, 0, len(rsaSignatureSchemes)) + for _, candidate := range rsaSignatureSchemes { + if size >= candidate.minModulusBytes && version <= candidate.maxVersion { + sigAlgs = append(sigAlgs, candidate.scheme) + } + } + case ed25519.PublicKey: + sigAlgs = []SignatureScheme{Ed25519} + default: + return nil + } + + if cert.SupportedSignatureAlgorithms != nil { + var filteredSigAlgs []SignatureScheme + for _, sigAlg := range sigAlgs { + if isSupportedSignatureAlgorithm(sigAlg, cert.SupportedSignatureAlgorithms) { + filteredSigAlgs = append(filteredSigAlgs, sigAlg) + } + } + return filteredSigAlgs + } + return sigAlgs +} + +// selectSignatureScheme picks a SignatureScheme from the peer's preference list +// that works with the selected certificate. It's only called for protocol +// versions that support signature algorithms, so TLS 1.2 and 1.3. +func selectSignatureScheme(vers uint16, c *Certificate, peerAlgs []SignatureScheme) (SignatureScheme, error) { + supportedAlgs := signatureSchemesForCertificate(vers, c) + if len(supportedAlgs) == 0 { + return 0, unsupportedCertificateError(c) + } + if len(peerAlgs) == 0 && vers == VersionTLS12 { + // For TLS 1.2, if the client didn't send signature_algorithms then we + // can assume that it supports SHA1. See RFC 5246, Section 7.4.1.4.1. + peerAlgs = []SignatureScheme{PKCS1WithSHA1, ECDSAWithSHA1} + } + // Pick signature scheme in the peer's preference order, as our + // preference order is not configurable. + for _, preferredAlg := range peerAlgs { + // [uTLS] SECTION BEGIN + // if fips140tls.Required() && !isSupportedSignatureAlgorithm(preferredAlg, defaultSupportedSignatureAlgorithmsFIPS) { + // continue + // } + // [uTLS] SECTION END + if isSupportedSignatureAlgorithm(preferredAlg, supportedAlgs) { + return preferredAlg, nil + } + } + return 0, errors.New("tls: peer doesn't support any of the certificate's signature algorithms") +} + +// unsupportedCertificateError returns a helpful error for certificates with +// an unsupported private key. +func unsupportedCertificateError(cert *Certificate) error { + switch cert.PrivateKey.(type) { + case rsa.PrivateKey, ecdsa.PrivateKey: + return fmt.Errorf("tls: unsupported certificate: private key is %T, expected *%T", + cert.PrivateKey, cert.PrivateKey) + case *ed25519.PrivateKey: + return fmt.Errorf("tls: unsupported certificate: private key is *ed25519.PrivateKey, expected ed25519.PrivateKey") + } + + signer, ok := cert.PrivateKey.(crypto.Signer) + if !ok { + return fmt.Errorf("tls: certificate private key (%T) does not implement crypto.Signer", + cert.PrivateKey) + } + + switch pub := signer.Public().(type) { + case *ecdsa.PublicKey: + switch pub.Curve { + case elliptic.P256(): + case elliptic.P384(): + case elliptic.P521(): + default: + return fmt.Errorf("tls: unsupported certificate curve (%s)", pub.Curve.Params().Name) + } + case *rsa.PublicKey: + return fmt.Errorf("tls: certificate RSA key size too small for supported signature algorithms") + case ed25519.PublicKey: + default: + return fmt.Errorf("tls: unsupported certificate key (%T)", pub) + } + + if cert.SupportedSignatureAlgorithms != nil { + return fmt.Errorf("tls: peer doesn't support the certificate custom signature algorithms") + } + + return fmt.Errorf("tls: internal error: unsupported key (%T)", cert.PrivateKey) +} diff --git a/backend/vendor/github.com/enetx/utls/cache.go b/backend/vendor/github.com/enetx/utls/cache.go new file mode 100644 index 0000000..a767761 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/cache.go @@ -0,0 +1,95 @@ +// Copyright 2022 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto/x509" + "runtime" + "sync" + "sync/atomic" +) + +type cacheEntry struct { + refs atomic.Int64 + cert *x509.Certificate +} + +// certCache implements an intern table for reference counted x509.Certificates, +// implemented in a similar fashion to BoringSSL's CRYPTO_BUFFER_POOL. This +// allows for a single x509.Certificate to be kept in memory and referenced from +// multiple Conns. Returned references should not be mutated by callers. Certificates +// are still safe to use after they are removed from the cache. +// +// Certificates are returned wrapped in an activeCert struct that should be held by +// the caller. When references to the activeCert are freed, the number of references +// to the certificate in the cache is decremented. Once the number of references +// reaches zero, the entry is evicted from the cache. +// +// The main difference between this implementation and CRYPTO_BUFFER_POOL is that +// CRYPTO_BUFFER_POOL is a more generic structure which supports blobs of data, +// rather than specific structures. Since we only care about x509.Certificates, +// certCache is implemented as a specific cache, rather than a generic one. +// +// See https://boringssl.googlesource.com/boringssl/+/master/include/openssl/pool.h +// and https://boringssl.googlesource.com/boringssl/+/master/crypto/pool/pool.c +// for the BoringSSL reference. +type certCache struct { + sync.Map +} + +var globalCertCache = new(certCache) + +// activeCert is a handle to a certificate held in the cache. Once there are +// no alive activeCerts for a given certificate, the certificate is removed +// from the cache by a finalizer. +type activeCert struct { + cert *x509.Certificate +} + +// active increments the number of references to the entry, wraps the +// certificate in the entry in an activeCert, and sets the finalizer. +// +// Note that there is a race between active and the finalizer set on the +// returned activeCert, triggered if active is called after the ref count is +// decremented such that refs may be > 0 when evict is called. We consider this +// safe, since the caller holding an activeCert for an entry that is no longer +// in the cache is fine, with the only side effect being the memory overhead of +// there being more than one distinct reference to a certificate alive at once. +func (cc *certCache) active(e *cacheEntry) *activeCert { + e.refs.Add(1) + a := &activeCert{e.cert} + runtime.SetFinalizer(a, func(_ *activeCert) { + if e.refs.Add(-1) == 0 { + cc.evict(e) + } + }) + return a +} + +// evict removes a cacheEntry from the cache. +func (cc *certCache) evict(e *cacheEntry) { + cc.Delete(string(e.cert.Raw)) +} + +// newCert returns a x509.Certificate parsed from der. If there is already a copy +// of the certificate in the cache, a reference to the existing certificate will +// be returned. Otherwise, a fresh certificate will be added to the cache, and +// the reference returned. The returned reference should not be mutated. +func (cc *certCache) newCert(der []byte) (*activeCert, error) { + if entry, ok := cc.Load(string(der)); ok { + return cc.active(entry.(*cacheEntry)), nil + } + + cert, err := x509.ParseCertificate(der) + if err != nil { + return nil, err + } + + entry := &cacheEntry{cert: cert} + if entry, loaded := cc.LoadOrStore(string(der), entry); loaded { + return cc.active(entry.(*cacheEntry)), nil + } + return cc.active(entry), nil +} diff --git a/backend/vendor/github.com/enetx/utls/cipher_suites.go b/backend/vendor/github.com/enetx/utls/cipher_suites.go new file mode 100644 index 0000000..fc84733 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/cipher_suites.go @@ -0,0 +1,725 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto" + "crypto/aes" + "crypto/cipher" + "crypto/des" + "crypto/hmac" + "crypto/rc4" + "crypto/sha1" + "crypto/sha256" + "fmt" + "hash" + "runtime" + _ "unsafe" // for linkname + + "github.com/enetx/utls/internal/boring" + "golang.org/x/sys/cpu" + + "golang.org/x/crypto/chacha20poly1305" +) + +// CipherSuite is a TLS cipher suite. Note that most functions in this package +// accept and expose cipher suite IDs instead of this type. +type CipherSuite struct { + ID uint16 + Name string + + // Supported versions is the list of TLS protocol versions that can + // negotiate this cipher suite. + SupportedVersions []uint16 + + // Insecure is true if the cipher suite has known security issues + // due to its primitives, design, or implementation. + Insecure bool +} + +var ( + supportedUpToTLS12 = []uint16{VersionTLS10, VersionTLS11, VersionTLS12} + supportedOnlyTLS12 = []uint16{VersionTLS12} + supportedOnlyTLS13 = []uint16{VersionTLS13} +) + +// CipherSuites returns a list of cipher suites currently implemented by this +// package, excluding those with security issues, which are returned by +// [InsecureCipherSuites]. +// +// The list is sorted by ID. Note that the default cipher suites selected by +// this package might depend on logic that can't be captured by a static list, +// and might not match those returned by this function. +func CipherSuites() []*CipherSuite { + return []*CipherSuite{ + {TLS_AES_128_GCM_SHA256, "TLS_AES_128_GCM_SHA256", supportedOnlyTLS13, false}, + {TLS_AES_256_GCM_SHA384, "TLS_AES_256_GCM_SHA384", supportedOnlyTLS13, false}, + {TLS_CHACHA20_POLY1305_SHA256, "TLS_CHACHA20_POLY1305_SHA256", supportedOnlyTLS13, false}, + + {TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA", supportedUpToTLS12, false}, + {TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA", supportedUpToTLS12, false}, + {TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA", supportedUpToTLS12, false}, + {TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA", supportedUpToTLS12, false}, + {TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256", supportedOnlyTLS12, false}, + {TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384", supportedOnlyTLS12, false}, + {TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256", supportedOnlyTLS12, false}, + {TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384", supportedOnlyTLS12, false}, + {TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256", supportedOnlyTLS12, false}, + {TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256", supportedOnlyTLS12, false}, + } +} + +// InsecureCipherSuites returns a list of cipher suites currently implemented by +// this package and which have security issues. +// +// Most applications should not use the cipher suites in this list, and should +// only use those returned by [CipherSuites]. +func InsecureCipherSuites() []*CipherSuite { + // This list includes RC4, CBC_SHA256, and 3DES cipher suites. See + // cipherSuitesPreferenceOrder for details. + return []*CipherSuite{ + {TLS_RSA_WITH_RC4_128_SHA, "TLS_RSA_WITH_RC4_128_SHA", supportedUpToTLS12, true}, + {TLS_RSA_WITH_3DES_EDE_CBC_SHA, "TLS_RSA_WITH_3DES_EDE_CBC_SHA", supportedUpToTLS12, true}, + {TLS_RSA_WITH_AES_128_CBC_SHA, "TLS_RSA_WITH_AES_128_CBC_SHA", supportedUpToTLS12, true}, + {TLS_RSA_WITH_AES_256_CBC_SHA, "TLS_RSA_WITH_AES_256_CBC_SHA", supportedUpToTLS12, true}, + {TLS_RSA_WITH_AES_128_CBC_SHA256, "TLS_RSA_WITH_AES_128_CBC_SHA256", supportedOnlyTLS12, true}, + {TLS_RSA_WITH_AES_128_GCM_SHA256, "TLS_RSA_WITH_AES_128_GCM_SHA256", supportedOnlyTLS12, true}, + {TLS_RSA_WITH_AES_256_GCM_SHA384, "TLS_RSA_WITH_AES_256_GCM_SHA384", supportedOnlyTLS12, true}, + {TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, "TLS_ECDHE_ECDSA_WITH_RC4_128_SHA", supportedUpToTLS12, true}, + {TLS_ECDHE_RSA_WITH_RC4_128_SHA, "TLS_ECDHE_RSA_WITH_RC4_128_SHA", supportedUpToTLS12, true}, + {TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA", supportedUpToTLS12, true}, + {TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256", supportedOnlyTLS12, true}, + {TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256", supportedOnlyTLS12, true}, + } +} + +// CipherSuiteName returns the standard name for the passed cipher suite ID +// (e.g. "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256"), or a fallback representation +// of the ID value if the cipher suite is not implemented by this package. +func CipherSuiteName(id uint16) string { + for _, c := range CipherSuites() { + if c.ID == id { + return c.Name + } + } + for _, c := range InsecureCipherSuites() { + if c.ID == id { + return c.Name + } + } + return fmt.Sprintf("0x%04X", id) +} + +const ( + // suiteECDHE indicates that the cipher suite involves elliptic curve + // Diffie-Hellman. This means that it should only be selected when the + // client indicates that it supports ECC with a curve and point format + // that we're happy with. + suiteECDHE = 1 << iota + // suiteECSign indicates that the cipher suite involves an ECDSA or + // EdDSA signature and therefore may only be selected when the server's + // certificate is ECDSA or EdDSA. If this is not set then the cipher suite + // is RSA based. + suiteECSign + // suiteTLS12 indicates that the cipher suite should only be advertised + // and accepted when using TLS 1.2. + suiteTLS12 + // suiteSHA384 indicates that the cipher suite uses SHA384 as the + // handshake hash. + suiteSHA384 +) + +// A cipherSuite is a TLS 1.0–1.2 cipher suite, and defines the key exchange +// mechanism, as well as the cipher+MAC pair or the AEAD. +type cipherSuite struct { + id uint16 + // the lengths, in bytes, of the key material needed for each component. + keyLen int + macLen int + ivLen int + ka func(version uint16) keyAgreement + // flags is a bitmask of the suite* values, above. + flags int + cipher func(key, iv []byte, isRead bool) any + mac func(key []byte) hash.Hash + aead func(key, fixedNonce []byte) aead +} + +var cipherSuites = []*cipherSuite{ // TODO: replace with a map, since the order doesn't matter. + {TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, 32, 0, 12, ecdheRSAKA, suiteECDHE | suiteTLS12, nil, nil, aeadChaCha20Poly1305}, + {TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, 32, 0, 12, ecdheECDSAKA, suiteECDHE | suiteECSign | suiteTLS12, nil, nil, aeadChaCha20Poly1305}, + {TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, 16, 0, 4, ecdheRSAKA, suiteECDHE | suiteTLS12, nil, nil, aeadAESGCM}, + {TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 16, 0, 4, ecdheECDSAKA, suiteECDHE | suiteECSign | suiteTLS12, nil, nil, aeadAESGCM}, + {TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, 32, 0, 4, ecdheRSAKA, suiteECDHE | suiteTLS12 | suiteSHA384, nil, nil, aeadAESGCM}, + {TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, 32, 0, 4, ecdheECDSAKA, suiteECDHE | suiteECSign | suiteTLS12 | suiteSHA384, nil, nil, aeadAESGCM}, + {TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, 16, 32, 16, ecdheRSAKA, suiteECDHE | suiteTLS12, cipherAES, macSHA256, nil}, + {TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, 16, 20, 16, ecdheRSAKA, suiteECDHE, cipherAES, macSHA1, nil}, + {TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, 16, 32, 16, ecdheECDSAKA, suiteECDHE | suiteECSign | suiteTLS12, cipherAES, macSHA256, nil}, + {TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, 16, 20, 16, ecdheECDSAKA, suiteECDHE | suiteECSign, cipherAES, macSHA1, nil}, + {TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, 32, 20, 16, ecdheRSAKA, suiteECDHE, cipherAES, macSHA1, nil}, + {TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, 32, 20, 16, ecdheECDSAKA, suiteECDHE | suiteECSign, cipherAES, macSHA1, nil}, + {TLS_RSA_WITH_AES_128_GCM_SHA256, 16, 0, 4, rsaKA, suiteTLS12, nil, nil, aeadAESGCM}, + {TLS_RSA_WITH_AES_256_GCM_SHA384, 32, 0, 4, rsaKA, suiteTLS12 | suiteSHA384, nil, nil, aeadAESGCM}, + {TLS_RSA_WITH_AES_128_CBC_SHA256, 16, 32, 16, rsaKA, suiteTLS12, cipherAES, macSHA256, nil}, + {TLS_RSA_WITH_AES_128_CBC_SHA, 16, 20, 16, rsaKA, 0, cipherAES, macSHA1, nil}, + {TLS_RSA_WITH_AES_256_CBC_SHA, 32, 20, 16, rsaKA, 0, cipherAES, macSHA1, nil}, + {TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, 24, 20, 8, ecdheRSAKA, suiteECDHE, cipher3DES, macSHA1, nil}, + {TLS_RSA_WITH_3DES_EDE_CBC_SHA, 24, 20, 8, rsaKA, 0, cipher3DES, macSHA1, nil}, + {TLS_RSA_WITH_RC4_128_SHA, 16, 20, 0, rsaKA, 0, cipherRC4, macSHA1, nil}, + {TLS_ECDHE_RSA_WITH_RC4_128_SHA, 16, 20, 0, ecdheRSAKA, suiteECDHE, cipherRC4, macSHA1, nil}, + {TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, 16, 20, 0, ecdheECDSAKA, suiteECDHE | suiteECSign, cipherRC4, macSHA1, nil}, +} + +// selectCipherSuite returns the first TLS 1.0–1.2 cipher suite from ids which +// is also in supportedIDs and passes the ok filter. +func selectCipherSuite(ids, supportedIDs []uint16, ok func(*cipherSuite) bool) *cipherSuite { + for _, id := range ids { + candidate := cipherSuiteByID(id) + if candidate == nil || !ok(candidate) { + continue + } + + for _, suppID := range supportedIDs { + if id == suppID { + return candidate + } + } + } + return nil +} + +// A cipherSuiteTLS13 defines only the pair of the AEAD algorithm and hash +// algorithm to be used with HKDF. See RFC 8446, Appendix B.4. +type cipherSuiteTLS13 struct { + id uint16 + keyLen int + aead func(key, fixedNonce []byte) aead + hash crypto.Hash +} + +// cipherSuitesTLS13 should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/quic-go/quic-go +// - github.com/sagernet/quic-go +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname cipherSuitesTLS13 +var cipherSuitesTLS13 = []*cipherSuiteTLS13{ // TODO: replace with a map. + {TLS_AES_128_GCM_SHA256, 16, aeadAESGCMTLS13, crypto.SHA256}, + {TLS_CHACHA20_POLY1305_SHA256, 32, aeadChaCha20Poly1305, crypto.SHA256}, + {TLS_AES_256_GCM_SHA384, 32, aeadAESGCMTLS13, crypto.SHA384}, +} + +// cipherSuitesPreferenceOrder is the order in which we'll select (on the +// server) or advertise (on the client) TLS 1.0–1.2 cipher suites. +// +// Cipher suites are filtered but not reordered based on the application and +// peer's preferences, meaning we'll never select a suite lower in this list if +// any higher one is available. This makes it more defensible to keep weaker +// cipher suites enabled, especially on the server side where we get the last +// word, since there are no known downgrade attacks on cipher suites selection. +// +// The list is sorted by applying the following priority rules, stopping at the +// first (most important) applicable one: +// +// - Anything else comes before RC4 +// +// RC4 has practically exploitable biases. See https://www.rc4nomore.com. +// +// - Anything else comes before CBC_SHA256 +// +// SHA-256 variants of the CBC ciphersuites don't implement any Lucky13 +// countermeasures. See https://www.isg.rhul.ac.uk/tls/Lucky13.html and +// https://www.imperialviolet.org/2013/02/04/luckythirteen.html. +// +// - Anything else comes before 3DES +// +// 3DES has 64-bit blocks, which makes it fundamentally susceptible to +// birthday attacks. See https://sweet32.info. +// +// - ECDHE comes before anything else +// +// Once we got the broken stuff out of the way, the most important +// property a cipher suite can have is forward secrecy. We don't +// implement FFDHE, so that means ECDHE. +// +// - AEADs come before CBC ciphers +// +// Even with Lucky13 countermeasures, MAC-then-Encrypt CBC cipher suites +// are fundamentally fragile, and suffered from an endless sequence of +// padding oracle attacks. See https://eprint.iacr.org/2015/1129, +// https://www.imperialviolet.org/2014/12/08/poodleagain.html, and +// https://blog.cloudflare.com/yet-another-padding-oracle-in-openssl-cbc-ciphersuites/. +// +// - AES comes before ChaCha20 +// +// When AES hardware is available, AES-128-GCM and AES-256-GCM are faster +// than ChaCha20Poly1305. +// +// When AES hardware is not available, AES-128-GCM is one or more of: much +// slower, way more complex, and less safe (because not constant time) +// than ChaCha20Poly1305. +// +// We use this list if we think both peers have AES hardware, and +// cipherSuitesPreferenceOrderNoAES otherwise. +// +// - AES-128 comes before AES-256 +// +// The only potential advantages of AES-256 are better multi-target +// margins, and hypothetical post-quantum properties. Neither apply to +// TLS, and AES-256 is slower due to its four extra rounds (which don't +// contribute to the advantages above). +// +// - ECDSA comes before RSA +// +// The relative order of ECDSA and RSA cipher suites doesn't matter, +// as they depend on the certificate. Pick one to get a stable order. +var cipherSuitesPreferenceOrder = []uint16{ + // AEADs w/ ECDHE + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + + // CBC w/ ECDHE + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + + // AEADs w/o ECDHE + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + + // CBC w/o ECDHE + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + + // 3DES + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + + // CBC_SHA256 + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + TLS_RSA_WITH_AES_128_CBC_SHA256, + + // RC4 + TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, TLS_ECDHE_RSA_WITH_RC4_128_SHA, + TLS_RSA_WITH_RC4_128_SHA, +} + +var cipherSuitesPreferenceOrderNoAES = []uint16{ + // ChaCha20Poly1305 + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + + // AES-GCM w/ ECDHE + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + + // The rest of cipherSuitesPreferenceOrder. + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + TLS_RSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, TLS_ECDHE_RSA_WITH_RC4_128_SHA, + TLS_RSA_WITH_RC4_128_SHA, +} + +// disabledCipherSuites are not used unless explicitly listed in Config.CipherSuites. +var disabledCipherSuites = map[uint16]bool{ + // CBC_SHA256 + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256: true, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256: true, + TLS_RSA_WITH_AES_128_CBC_SHA256: true, + + // RC4 + TLS_ECDHE_ECDSA_WITH_RC4_128_SHA: true, + TLS_ECDHE_RSA_WITH_RC4_128_SHA: true, + TLS_RSA_WITH_RC4_128_SHA: true, +} + +// rsaKexCiphers contains the ciphers which use RSA based key exchange, +// which we also disable by default unless a GODEBUG is set. +var rsaKexCiphers = map[uint16]bool{ + TLS_RSA_WITH_RC4_128_SHA: true, + TLS_RSA_WITH_3DES_EDE_CBC_SHA: true, + TLS_RSA_WITH_AES_128_CBC_SHA: true, + TLS_RSA_WITH_AES_256_CBC_SHA: true, + TLS_RSA_WITH_AES_128_CBC_SHA256: true, + TLS_RSA_WITH_AES_128_GCM_SHA256: true, + TLS_RSA_WITH_AES_256_GCM_SHA384: true, +} + +// tdesCiphers contains 3DES ciphers, +// which we also disable by default unless a GODEBUG is set. +var tdesCiphers = map[uint16]bool{ + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA: true, + TLS_RSA_WITH_3DES_EDE_CBC_SHA: true, +} + +var ( + // Keep in sync with crypto/internal/fips140/aes/gcm.supportsAESGCM. + hasGCMAsmAMD64 = cpu.X86.HasAES && cpu.X86.HasPCLMULQDQ && cpu.X86.HasSSE41 && cpu.X86.HasSSSE3 + hasGCMAsmARM64 = cpu.ARM64.HasAES && cpu.ARM64.HasPMULL + hasGCMAsmS390X = cpu.S390X.HasAES && cpu.S390X.HasAESCTR && cpu.S390X.HasGHASH + hasGCMAsmPPC64 = runtime.GOARCH == "ppc64" || runtime.GOARCH == "ppc64le" + + hasAESGCMHardwareSupport = hasGCMAsmAMD64 || hasGCMAsmARM64 || hasGCMAsmS390X || hasGCMAsmPPC64 +) + +var aesgcmCiphers = map[uint16]bool{ + // TLS 1.2 + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256: true, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384: true, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256: true, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384: true, + // TLS 1.3 + TLS_AES_128_GCM_SHA256: true, + TLS_AES_256_GCM_SHA384: true, +} + +// aesgcmPreferred returns whether the first known cipher in the preference list +// is an AES-GCM cipher, implying the peer has hardware support for it. +func aesgcmPreferred(ciphers []uint16) bool { + for _, cID := range ciphers { + if c := cipherSuiteByID(cID); c != nil { + return aesgcmCiphers[cID] + } + if c := cipherSuiteTLS13ByID(cID); c != nil { + return aesgcmCiphers[cID] + } + } + return false +} + +func cipherRC4(key, iv []byte, isRead bool) any { + cipher, _ := rc4.NewCipher(key) + return cipher +} + +func cipher3DES(key, iv []byte, isRead bool) any { + block, _ := des.NewTripleDESCipher(key) + if isRead { + return cipher.NewCBCDecrypter(block, iv) + } + return cipher.NewCBCEncrypter(block, iv) +} + +func cipherAES(key, iv []byte, isRead bool) any { + block, _ := aes.NewCipher(key) + if isRead { + return cipher.NewCBCDecrypter(block, iv) + } + return cipher.NewCBCEncrypter(block, iv) +} + +// macSHA1 returns a SHA-1 based constant time MAC. +func macSHA1(key []byte) hash.Hash { + h := sha1.New + // The BoringCrypto SHA1 does not have a constant-time + // checksum function, so don't try to use it. + if !boring.Enabled { + h = newConstantTimeHash(h) + } + return hmac.New(h, key) +} + +// macSHA256 returns a SHA-256 based MAC. This is only supported in TLS 1.2 and +// is currently only used in disabled-by-default cipher suites. +func macSHA256(key []byte) hash.Hash { + return hmac.New(sha256.New, key) +} + +type aead interface { + cipher.AEAD + + // explicitNonceLen returns the number of bytes of explicit nonce + // included in each record. This is eight for older AEADs and + // zero for modern ones. + explicitNonceLen() int +} + +const ( + aeadNonceLength = 12 + noncePrefixLength = 4 +) + +// prefixNonceAEAD wraps an AEAD and prefixes a fixed portion of the nonce to +// each call. +type prefixNonceAEAD struct { + // nonce contains the fixed part of the nonce in the first four bytes. + nonce [aeadNonceLength]byte + aead cipher.AEAD +} + +func (f *prefixNonceAEAD) NonceSize() int { return aeadNonceLength - noncePrefixLength } +func (f *prefixNonceAEAD) Overhead() int { return f.aead.Overhead() } +func (f *prefixNonceAEAD) explicitNonceLen() int { return f.NonceSize() } + +func (f *prefixNonceAEAD) Seal(out, nonce, plaintext, additionalData []byte) []byte { + copy(f.nonce[4:], nonce) + return f.aead.Seal(out, f.nonce[:], plaintext, additionalData) +} + +func (f *prefixNonceAEAD) Open(out, nonce, ciphertext, additionalData []byte) ([]byte, error) { + copy(f.nonce[4:], nonce) + return f.aead.Open(out, f.nonce[:], ciphertext, additionalData) +} + +// xorNonceAEAD wraps an AEAD by XORing in a fixed pattern to the nonce +// before each call. +type xorNonceAEAD struct { + nonceMask [aeadNonceLength]byte + aead cipher.AEAD +} + +func (f *xorNonceAEAD) NonceSize() int { return 8 } // 64-bit sequence number +func (f *xorNonceAEAD) Overhead() int { return f.aead.Overhead() } +func (f *xorNonceAEAD) explicitNonceLen() int { return 0 } + +func (f *xorNonceAEAD) Seal(out, nonce, plaintext, additionalData []byte) []byte { + for i, b := range nonce { + f.nonceMask[4+i] ^= b + } + result := f.aead.Seal(out, f.nonceMask[:], plaintext, additionalData) + for i, b := range nonce { + f.nonceMask[4+i] ^= b + } + + return result +} + +func (f *xorNonceAEAD) Open(out, nonce, ciphertext, additionalData []byte) ([]byte, error) { + for i, b := range nonce { + f.nonceMask[4+i] ^= b + } + result, err := f.aead.Open(out, f.nonceMask[:], ciphertext, additionalData) + for i, b := range nonce { + f.nonceMask[4+i] ^= b + } + + return result, err +} + +func aeadAESGCM(key, noncePrefix []byte) aead { + if len(noncePrefix) != noncePrefixLength { + panic("tls: internal error: wrong nonce length") + } + aes, err := aes.NewCipher(key) + if err != nil { + panic(err) + } + var aead cipher.AEAD + if boring.Enabled { + aead, err = boring.NewGCMTLS(aes) + } else { + boring.Unreachable() + // [uTLS] SECTION BEGIN + // aead, err = gcm.NewGCMForTLS12(aes.(*fipsaes.Block)) + aead, err = cipher.NewGCM(aes) + // [uTLS] SECTION END + } + if err != nil { + panic(err) + } + + ret := &prefixNonceAEAD{aead: aead} + copy(ret.nonce[:], noncePrefix) + return ret +} + +// aeadAESGCMTLS13 should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/xtls/xray-core +// - github.com/v2fly/v2ray-core +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname aeadAESGCMTLS13 +func aeadAESGCMTLS13(key, nonceMask []byte) aead { + if len(nonceMask) != aeadNonceLength { + panic("tls: internal error: wrong nonce length") + } + aes, err := aes.NewCipher(key) + if err != nil { + panic(err) + } + var aead cipher.AEAD + if boring.Enabled { + aead, err = boring.NewGCMTLS13(aes) + } else { + boring.Unreachable() + // [uTLS] SECTION BEGIN + // aead, err = gcm.NewGCMForTLS13(aes.(*fipsaes.Block)) + aead, err = cipher.NewGCM(aes) + // [uTLS] SECTION END + } + if err != nil { + panic(err) + } + + ret := &xorNonceAEAD{aead: aead} + copy(ret.nonceMask[:], nonceMask) + return ret +} + +func aeadChaCha20Poly1305(key, nonceMask []byte) aead { + if len(nonceMask) != aeadNonceLength { + panic("tls: internal error: wrong nonce length") + } + aead, err := chacha20poly1305.New(key) + if err != nil { + panic(err) + } + + ret := &xorNonceAEAD{aead: aead} + copy(ret.nonceMask[:], nonceMask) + return ret +} + +type constantTimeHash interface { + hash.Hash + ConstantTimeSum(b []byte) []byte +} + +// cthWrapper wraps any hash.Hash that implements ConstantTimeSum, and replaces +// with that all calls to Sum. It's used to obtain a ConstantTimeSum-based HMAC. +type cthWrapper struct { + h constantTimeHash +} + +func (c *cthWrapper) Size() int { return c.h.Size() } +func (c *cthWrapper) BlockSize() int { return c.h.BlockSize() } +func (c *cthWrapper) Reset() { c.h.Reset() } +func (c *cthWrapper) Write(p []byte) (int, error) { return c.h.Write(p) } +func (c *cthWrapper) Sum(b []byte) []byte { return c.h.ConstantTimeSum(b) } + +func newConstantTimeHash(h func() hash.Hash) func() hash.Hash { + boring.Unreachable() + return func() hash.Hash { + return &cthWrapper{h().(constantTimeHash)} + } +} + +// tls10MAC implements the TLS 1.0 MAC function. RFC 2246, Section 6.2.3. +func tls10MAC(h hash.Hash, out, seq, header, data, extra []byte) []byte { + h.Reset() + h.Write(seq) + h.Write(header) + h.Write(data) + res := h.Sum(out) + if extra != nil { + h.Write(extra) + } + return res +} + +func rsaKA(version uint16) keyAgreement { + return rsaKeyAgreement{} +} + +func ecdheECDSAKA(version uint16) keyAgreement { + return &ecdheKeyAgreement{ + isRSA: false, + version: version, + } +} + +func ecdheRSAKA(version uint16) keyAgreement { + return &ecdheKeyAgreement{ + isRSA: true, + version: version, + } +} + +// mutualCipherSuite returns a cipherSuite given a list of supported +// ciphersuites and the id requested by the peer. +func mutualCipherSuite(have []uint16, want uint16) *cipherSuite { + for _, id := range have { + if id == want { + return cipherSuiteByID(id) + } + } + return nil +} + +func cipherSuiteByID(id uint16) *cipherSuite { + for _, cipherSuite := range utlsSupportedCipherSuites { + if cipherSuite.id == id { + return cipherSuite + } + } + return nil +} + +func mutualCipherSuiteTLS13(have []uint16, want uint16) *cipherSuiteTLS13 { + for _, id := range have { + if id == want { + return cipherSuiteTLS13ByID(id) + } + } + return nil +} + +func cipherSuiteTLS13ByID(id uint16) *cipherSuiteTLS13 { + for _, cipherSuite := range cipherSuitesTLS13 { + if cipherSuite.id == id { + return cipherSuite + } + } + return nil +} + +// A list of cipher suite IDs that are, or have been, implemented by this +// package. +// +// See https://www.iana.org/assignments/tls-parameters/tls-parameters.xml +const ( + // TLS 1.0 - 1.2 cipher suites. + TLS_RSA_WITH_RC4_128_SHA uint16 = 0x0005 + TLS_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x000a + TLS_RSA_WITH_AES_128_CBC_SHA uint16 = 0x002f + TLS_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0035 + TLS_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x003c + TLS_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x009c + TLS_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x009d + TLS_ECDHE_ECDSA_WITH_RC4_128_SHA uint16 = 0xc007 + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA uint16 = 0xc009 + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA uint16 = 0xc00a + TLS_ECDHE_RSA_WITH_RC4_128_SHA uint16 = 0xc011 + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xc012 + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA uint16 = 0xc013 + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA uint16 = 0xc014 + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 uint16 = 0xc023 + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0xc027 + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0xc02f + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 uint16 = 0xc02b + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0xc030 + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 uint16 = 0xc02c + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xcca8 + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xcca9 + + // TLS 1.3 cipher suites. + TLS_AES_128_GCM_SHA256 uint16 = 0x1301 + TLS_AES_256_GCM_SHA384 uint16 = 0x1302 + TLS_CHACHA20_POLY1305_SHA256 uint16 = 0x1303 + + // TLS_FALLBACK_SCSV isn't a standard cipher suite but an indicator + // that the client is doing version fallback. See RFC 7507. + TLS_FALLBACK_SCSV uint16 = 0x5600 + + // Legacy names for the corresponding cipher suites with the correct _SHA256 + // suffix, retained for backward compatibility. + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 = TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305 = TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 +) diff --git a/backend/vendor/github.com/enetx/utls/common.go b/backend/vendor/github.com/enetx/utls/common.go new file mode 100644 index 0000000..6035ceb --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/common.go @@ -0,0 +1,1819 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bytes" + "container/list" + "context" + "crypto" + "crypto/ecdsa" + "crypto/ed25519" + "crypto/elliptic" + "crypto/rand" + "crypto/rsa" + "crypto/sha512" + "crypto/x509" + "errors" + "fmt" + "io" + "net" + "slices" + "strings" + "sync" + "time" + _ "unsafe" // for linkname + + "github.com/enetx/utls/internal/fips140tls" +) + +const ( + VersionTLS10 = 0x0301 + VersionTLS11 = 0x0302 + VersionTLS12 = 0x0303 + VersionTLS13 = 0x0304 + + // Deprecated: SSLv3 is cryptographically broken, and is no longer + // supported by this package. See golang.org/issue/32716. + VersionSSL30 = 0x0300 +) + +// VersionName returns the name for the provided TLS version number +// (e.g. "TLS 1.3"), or a fallback representation of the value if the +// version is not implemented by this package. +func VersionName(version uint16) string { + switch version { + case VersionSSL30: + return "SSLv3" + case VersionTLS10: + return "TLS 1.0" + case VersionTLS11: + return "TLS 1.1" + case VersionTLS12: + return "TLS 1.2" + case VersionTLS13: + return "TLS 1.3" + default: + return fmt.Sprintf("0x%04X", version) + } +} + +const ( + maxPlaintext = 16384 // maximum plaintext payload length + maxCiphertext = 16384 + 2048 // maximum ciphertext payload length + maxCiphertextTLS13 = 16384 + 256 // maximum ciphertext length in TLS 1.3 + recordHeaderLen = 5 // record header length + maxHandshake = 65536 // maximum handshake we support (protocol max is 16 MB) + maxHandshakeCertificateMsg = 262144 // maximum certificate message size (256 KiB) + maxUselessRecords = 32 // maximum number of consecutive non-advancing records +) + +// TLS record types. +type recordType uint8 + +const ( + recordTypeChangeCipherSpec recordType = 20 + recordTypeAlert recordType = 21 + recordTypeHandshake recordType = 22 + recordTypeApplicationData recordType = 23 +) + +// TLS handshake message types. +const ( + typeHelloRequest uint8 = 0 + typeClientHello uint8 = 1 + typeServerHello uint8 = 2 + typeNewSessionTicket uint8 = 4 + typeEndOfEarlyData uint8 = 5 + typeEncryptedExtensions uint8 = 8 + typeCertificate uint8 = 11 + typeServerKeyExchange uint8 = 12 + typeCertificateRequest uint8 = 13 + typeServerHelloDone uint8 = 14 + typeCertificateVerify uint8 = 15 + typeClientKeyExchange uint8 = 16 + typeFinished uint8 = 20 + typeCertificateStatus uint8 = 22 + typeKeyUpdate uint8 = 24 + typeMessageHash uint8 = 254 // synthetic message +) + +// TLS compression types. +const ( + compressionNone uint8 = 0 +) + +// TLS extension numbers +const ( + extensionServerName uint16 = 0 + extensionStatusRequest uint16 = 5 + extensionSupportedCurves uint16 = 10 // supported_groups in TLS 1.3, see RFC 8446, Section 4.2.7 + extensionSupportedPoints uint16 = 11 + extensionSignatureAlgorithms uint16 = 13 + extensionALPN uint16 = 16 + extensionStatusRequestV2 uint16 = 17 + extensionSCT uint16 = 18 + extensionExtendedMasterSecret uint16 = 23 + extensionDelegatedCredentials uint16 = 34 + extensionSessionTicket uint16 = 35 + extensionPreSharedKey uint16 = 41 + extensionEarlyData uint16 = 42 + extensionSupportedVersions uint16 = 43 + extensionCookie uint16 = 44 + extensionPSKModes uint16 = 45 + extensionCertificateAuthorities uint16 = 47 + extensionSignatureAlgorithmsCert uint16 = 50 + extensionKeyShare uint16 = 51 + extensionQUICTransportParameters uint16 = 57 + extensionRenegotiationInfo uint16 = 0xff01 + extensionECHOuterExtensions uint16 = 0xfd00 + extensionEncryptedClientHello uint16 = 0xfe0d +) + +// TLS signaling cipher suite values +const ( + scsvRenegotiation uint16 = 0x00ff +) + +// CurveID is the type of a TLS identifier for a key exchange mechanism. See +// https://www.iana.org/assignments/tls-parameters/tls-parameters.xml#tls-parameters-8. +// +// In TLS 1.2, this registry used to support only elliptic curves. In TLS 1.3, +// it was extended to other groups and renamed NamedGroup. See RFC 8446, Section +// 4.2.7. It was then also extended to other mechanisms, such as hybrid +// post-quantum KEMs. +type CurveID uint16 + +const ( + CurveP256 CurveID = 23 + CurveP384 CurveID = 24 + CurveP521 CurveID = 25 + X25519 CurveID = 29 + X25519MLKEM768 CurveID = 4588 +) + +func isTLS13OnlyKeyExchange(curve CurveID) bool { + return curve == X25519MLKEM768 +} + +func isPQKeyExchange(curve CurveID) bool { + return curve == X25519MLKEM768 +} + +// TLS 1.3 Key Share. See RFC 8446, Section 4.2.8. +type keyShare struct { + group CurveID + data []byte +} + +// TLS 1.3 PSK Key Exchange Modes. See RFC 8446, Section 4.2.9. +const ( + pskModePlain uint8 = 0 + pskModeDHE uint8 = 1 +) + +// TLS 1.3 PSK Identity. Can be a Session Ticket, or a reference to a saved +// session. See RFC 8446, Section 4.2.11. +type pskIdentity struct { + label []byte + obfuscatedTicketAge uint32 +} + +// TLS Elliptic Curve Point Formats +// https://www.iana.org/assignments/tls-parameters/tls-parameters.xml#tls-parameters-9 +const ( + pointFormatUncompressed uint8 = 0 +) + +// TLS CertificateStatusType (RFC 3546) +const ( + statusTypeOCSP uint8 = 1 + statusV2TypeOCSP uint8 = 2 +) + +// Certificate types (for certificateRequestMsg) +const ( + certTypeRSASign = 1 + certTypeECDSASign = 64 // ECDSA or EdDSA keys, see RFC 8422, Section 3. +) + +// Signature algorithms (for internal signaling use). Starting at 225 to avoid overlap with +// TLS 1.2 codepoints (RFC 5246, Appendix A.4.1), with which these have nothing to do. +const ( + signaturePKCS1v15 uint8 = iota + 225 + signatureRSAPSS + signatureECDSA + signatureEd25519 + signatureEdDilithium3 +) + +// directSigning is a standard Hash value that signals that no pre-hashing +// should be performed, and that the input should be signed directly. It is the +// hash function associated with the Ed25519 signature scheme. +var directSigning crypto.Hash = 0 + +// helloRetryRequestRandom is set as the Random value of a ServerHello +// to signal that the message is actually a HelloRetryRequest. +var helloRetryRequestRandom = []byte{ // See RFC 8446, Section 4.1.3. + 0xCF, 0x21, 0xAD, 0x74, 0xE5, 0x9A, 0x61, 0x11, + 0xBE, 0x1D, 0x8C, 0x02, 0x1E, 0x65, 0xB8, 0x91, + 0xC2, 0xA2, 0x11, 0x16, 0x7A, 0xBB, 0x8C, 0x5E, + 0x07, 0x9E, 0x09, 0xE2, 0xC8, 0xA8, 0x33, 0x9C, +} + +const ( + // downgradeCanaryTLS12 or downgradeCanaryTLS11 is embedded in the server + // random as a downgrade protection if the server would be capable of + // negotiating a higher version. See RFC 8446, Section 4.1.3. + downgradeCanaryTLS12 = "DOWNGRD\x01" + downgradeCanaryTLS11 = "DOWNGRD\x00" +) + +// testingOnlyForceDowngradeCanary is set in tests to force the server side to +// include downgrade canaries even if it's using its highers supported version. +var testingOnlyForceDowngradeCanary bool + +// ConnectionState records basic TLS details about the connection. +type ConnectionState struct { + // Version is the TLS version used by the connection (e.g. VersionTLS12). + Version uint16 + + // HandshakeComplete is true if the handshake has concluded. + HandshakeComplete bool + + // DidResume is true if this connection was successfully resumed from a + // previous session with a session ticket or similar mechanism. + DidResume bool + + // CipherSuite is the cipher suite negotiated for the connection (e.g. + // TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_AES_128_GCM_SHA256). + CipherSuite uint16 + + // NegotiatedProtocol is the application protocol negotiated with ALPN. + NegotiatedProtocol string + + // NegotiatedProtocolIsMutual used to indicate a mutual NPN negotiation. + // + // Deprecated: this value is always true. + NegotiatedProtocolIsMutual bool + + // PeerApplicationSettings is the Application-Layer Protocol Settings (ALPS) + // provided by peer. + PeerApplicationSettings []byte // [uTLS] + + // ServerName is the value of the Server Name Indication extension sent by + // the client. It's available both on the server and on the client side. + ServerName string + + // PeerCertificates are the parsed certificates sent by the peer, in the + // order in which they were sent. The first element is the leaf certificate + // that the connection is verified against. + // + // On the client side, it can't be empty. On the server side, it can be + // empty if Config.ClientAuth is not RequireAnyClientCert or + // RequireAndVerifyClientCert. + // + // PeerCertificates and its contents should not be modified. + PeerCertificates []*x509.Certificate + + // VerifiedChains is a list of one or more chains where the first element is + // PeerCertificates[0] and the last element is from Config.RootCAs (on the + // client side) or Config.ClientCAs (on the server side). + // + // On the client side, it's set if Config.InsecureSkipVerify is false. On + // the server side, it's set if Config.ClientAuth is VerifyClientCertIfGiven + // (and the peer provided a certificate) or RequireAndVerifyClientCert. + // + // VerifiedChains and its contents should not be modified. + VerifiedChains [][]*x509.Certificate + + // SignedCertificateTimestamps is a list of SCTs provided by the peer + // through the TLS handshake for the leaf certificate, if any. + SignedCertificateTimestamps [][]byte + + // OCSPResponse is a stapled Online Certificate Status Protocol (OCSP) + // response provided by the peer for the leaf certificate, if any. + OCSPResponse []byte + + // TLSUnique contains the "tls-unique" channel binding value (see RFC 5929, + // Section 3). This value will be nil for TLS 1.3 connections and for + // resumed connections that don't support Extended Master Secret (RFC 7627). + TLSUnique []byte + + // ECHAccepted indicates if Encrypted Client Hello was offered by the client + // and accepted by the server. Currently, ECH is supported only on the + // client side. + ECHAccepted bool + + // ekm is a closure exposed via ExportKeyingMaterial. + ekm func(label string, context []byte, length int) ([]byte, error) + + // testingOnlyDidHRR is true if a HelloRetryRequest was sent/received. + testingOnlyDidHRR bool + + // testingOnlyCurveID is the selected CurveID, or zero if an RSA exchanges + // is performed. + testingOnlyCurveID CurveID +} + +// ExportKeyingMaterial returns length bytes of exported key material in a new +// slice as defined in RFC 5705. If context is nil, it is not used as part of +// the seed. If the connection was set to allow renegotiation via +// Config.Renegotiation, or if the connections supports neither TLS 1.3 nor +// Extended Master Secret, this function will return an error. +// +// Exporting key material without Extended Master Secret or TLS 1.3 was disabled +// in Go 1.22 due to security issues (see the Security Considerations sections +// of RFC 5705 and RFC 7627), but can be re-enabled with the GODEBUG setting +// tlsunsafeekm=1. +func (cs *ConnectionState) ExportKeyingMaterial(label string, context []byte, length int) ([]byte, error) { + return cs.ekm(label, context, length) +} + +// ClientAuthType declares the policy the server will follow for +// TLS Client Authentication. +type ClientAuthType int + +const ( + // NoClientCert indicates that no client certificate should be requested + // during the handshake, and if any certificates are sent they will not + // be verified. + NoClientCert ClientAuthType = iota + // RequestClientCert indicates that a client certificate should be requested + // during the handshake, but does not require that the client send any + // certificates. + RequestClientCert + // RequireAnyClientCert indicates that a client certificate should be requested + // during the handshake, and that at least one certificate is required to be + // sent by the client, but that certificate is not required to be valid. + RequireAnyClientCert + // VerifyClientCertIfGiven indicates that a client certificate should be requested + // during the handshake, but does not require that the client sends a + // certificate. If the client does send a certificate it is required to be + // valid. + VerifyClientCertIfGiven + // RequireAndVerifyClientCert indicates that a client certificate should be requested + // during the handshake, and that at least one valid certificate is required + // to be sent by the client. + RequireAndVerifyClientCert +) + +// requiresClientCert reports whether the ClientAuthType requires a client +// certificate to be provided. +func requiresClientCert(c ClientAuthType) bool { + switch c { + case RequireAnyClientCert, RequireAndVerifyClientCert: + return true + default: + return false + } +} + +// ClientSessionCache is a cache of ClientSessionState objects that can be used +// by a client to resume a TLS session with a given server. ClientSessionCache +// implementations should expect to be called concurrently from different +// goroutines. Up to TLS 1.2, only ticket-based resumption is supported, not +// SessionID-based resumption. In TLS 1.3 they were merged into PSK modes, which +// are supported via this interface. +type ClientSessionCache interface { + // Get searches for a ClientSessionState associated with the given key. + // On return, ok is true if one was found. + Get(sessionKey string) (session *ClientSessionState, ok bool) + + // Put adds the ClientSessionState to the cache with the given key. It might + // get called multiple times in a connection if a TLS 1.3 server provides + // more than one session ticket. If called with a nil *ClientSessionState, + // it should remove the cache entry. + Put(sessionKey string, cs *ClientSessionState) +} + +//go:generate stringer -linecomment -type=SignatureScheme,CurveID,ClientAuthType -output=common_string.go + +// SignatureScheme identifies a signature algorithm supported by TLS. See +// RFC 8446, Section 4.2.3. +type SignatureScheme uint16 + +const ( + // RSASSA-PKCS1-v1_5 algorithms. + PKCS1WithSHA256 SignatureScheme = 0x0401 + PKCS1WithSHA384 SignatureScheme = 0x0501 + PKCS1WithSHA512 SignatureScheme = 0x0601 + + // RSASSA-PSS algorithms with public key OID rsaEncryption. + PSSWithSHA256 SignatureScheme = 0x0804 + PSSWithSHA384 SignatureScheme = 0x0805 + PSSWithSHA512 SignatureScheme = 0x0806 + + // ECDSA algorithms. Only constrained to a specific curve in TLS 1.3. + ECDSAWithP256AndSHA256 SignatureScheme = 0x0403 + ECDSAWithP384AndSHA384 SignatureScheme = 0x0503 + ECDSAWithP521AndSHA512 SignatureScheme = 0x0603 + + // EdDSA algorithms. + Ed25519 SignatureScheme = 0x0807 + + // Legacy signature and hash algorithms for TLS 1.2. + PKCS1WithSHA1 SignatureScheme = 0x0201 + ECDSAWithSHA1 SignatureScheme = 0x0203 +) + +// ClientHelloInfo contains information from a ClientHello message in order to +// guide application logic in the GetCertificate and GetConfigForClient callbacks. +type ClientHelloInfo struct { + // CipherSuites lists the CipherSuites supported by the client (e.g. + // TLS_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256). + CipherSuites []uint16 + + // ServerName indicates the name of the server requested by the client + // in order to support virtual hosting. ServerName is only set if the + // client is using SNI (see RFC 4366, Section 3.1). + ServerName string + + // SupportedCurves lists the key exchange mechanisms supported by the + // client. It was renamed to "supported groups" in TLS 1.3, see RFC 8446, + // Section 4.2.7 and [CurveID]. + // + // SupportedCurves may be nil in TLS 1.2 and lower if the Supported Elliptic + // Curves Extension is not being used (see RFC 4492, Section 5.1.1). + SupportedCurves []CurveID + + // SupportedPoints lists the point formats supported by the client. + // SupportedPoints is set only if the Supported Point Formats Extension + // is being used (see RFC 4492, Section 5.1.2). + SupportedPoints []uint8 + + // SignatureSchemes lists the signature and hash schemes that the client + // is willing to verify. SignatureSchemes is set only if the Signature + // Algorithms Extension is being used (see RFC 5246, Section 7.4.1.4.1). + SignatureSchemes []SignatureScheme + + // SupportedProtos lists the application protocols supported by the client. + // SupportedProtos is set only if the Application-Layer Protocol + // Negotiation Extension is being used (see RFC 7301, Section 3.1). + // + // Servers can select a protocol by setting Config.NextProtos in a + // GetConfigForClient return value. + SupportedProtos []string + + // SupportedVersions lists the TLS versions supported by the client. + // For TLS versions less than 1.3, this is extrapolated from the max + // version advertised by the client, so values other than the greatest + // might be rejected if used. + SupportedVersions []uint16 + + // Extensions lists the IDs of the extensions presented by the client + // in the ClientHello. + Extensions []uint16 + + // Conn is the underlying net.Conn for the connection. Do not read + // from, or write to, this connection; that will cause the TLS + // connection to fail. + Conn net.Conn + + // config is embedded by the GetCertificate or GetConfigForClient caller, + // for use with SupportsCertificate. + config *Config + + // ctx is the context of the handshake that is in progress. + ctx context.Context +} + +// Context returns the context of the handshake that is in progress. +// This context is a child of the context passed to HandshakeContext, +// if any, and is canceled when the handshake concludes. +func (c *ClientHelloInfo) Context() context.Context { + return c.ctx +} + +// CertificateRequestInfo contains information from a server's +// CertificateRequest message, which is used to demand a certificate and proof +// of control from a client. +type CertificateRequestInfo struct { + // AcceptableCAs contains zero or more, DER-encoded, X.501 + // Distinguished Names. These are the names of root or intermediate CAs + // that the server wishes the returned certificate to be signed by. An + // empty slice indicates that the server has no preference. + AcceptableCAs [][]byte + + // SignatureSchemes lists the signature schemes that the server is + // willing to verify. + SignatureSchemes []SignatureScheme + + // Version is the TLS version that was negotiated for this connection. + Version uint16 + + // ctx is the context of the handshake that is in progress. + ctx context.Context +} + +// Context returns the context of the handshake that is in progress. +// This context is a child of the context passed to HandshakeContext, +// if any, and is canceled when the handshake concludes. +func (c *CertificateRequestInfo) Context() context.Context { + return c.ctx +} + +// RenegotiationSupport enumerates the different levels of support for TLS +// renegotiation. TLS renegotiation is the act of performing subsequent +// handshakes on a connection after the first. This significantly complicates +// the state machine and has been the source of numerous, subtle security +// issues. Initiating a renegotiation is not supported, but support for +// accepting renegotiation requests may be enabled. +// +// Even when enabled, the server may not change its identity between handshakes +// (i.e. the leaf certificate must be the same). Additionally, concurrent +// handshake and application data flow is not permitted so renegotiation can +// only be used with protocols that synchronise with the renegotiation, such as +// HTTPS. +// +// Renegotiation is not defined in TLS 1.3. +type RenegotiationSupport int + +const ( + // RenegotiateNever disables renegotiation. + RenegotiateNever RenegotiationSupport = iota + + // RenegotiateOnceAsClient allows a remote server to request + // renegotiation once per connection. + RenegotiateOnceAsClient + + // RenegotiateFreelyAsClient allows a remote server to repeatedly + // request renegotiation. + RenegotiateFreelyAsClient +) + +// A Config structure is used to configure a TLS client or server. +// After one has been passed to a TLS function it must not be +// modified. A Config may be reused; the tls package will also not +// modify it. +type Config struct { + // Rand provides the source of entropy for nonces and RSA blinding. + // If Rand is nil, TLS uses the cryptographic random reader in package + // crypto/rand. + // The Reader must be safe for use by multiple goroutines. + Rand io.Reader + + // Time returns the current time as the number of seconds since the epoch. + // If Time is nil, TLS uses time.Now. + Time func() time.Time + + // Certificates contains one or more certificate chains to present to the + // other side of the connection. The first certificate compatible with the + // peer's requirements is selected automatically. + // + // Server configurations must set one of Certificates, GetCertificate or + // GetConfigForClient. Clients doing client-authentication may set either + // Certificates or GetClientCertificate. + // + // Note: if there are multiple Certificates, and they don't have the + // optional field Leaf set, certificate selection will incur a significant + // per-handshake performance cost. + Certificates []Certificate + + // NameToCertificate maps from a certificate name to an element of + // Certificates. Note that a certificate name can be of the form + // '*.example.com' and so doesn't have to be a domain name as such. + // + // Deprecated: NameToCertificate only allows associating a single + // certificate with a given name. Leave this field nil to let the library + // select the first compatible chain from Certificates. + NameToCertificate map[string]*Certificate + + // GetCertificate returns a Certificate based on the given + // ClientHelloInfo. It will only be called if the client supplies SNI + // information or if Certificates is empty. + // + // If GetCertificate is nil or returns nil, then the certificate is + // retrieved from NameToCertificate. If NameToCertificate is nil, the + // best element of Certificates will be used. + // + // Once a Certificate is returned it should not be modified. + GetCertificate func(*ClientHelloInfo) (*Certificate, error) + + // GetClientCertificate, if not nil, is called when a server requests a + // certificate from a client. If set, the contents of Certificates will + // be ignored. + // + // If GetClientCertificate returns an error, the handshake will be + // aborted and that error will be returned. Otherwise + // GetClientCertificate must return a non-nil Certificate. If + // Certificate.Certificate is empty then no certificate will be sent to + // the server. If this is unacceptable to the server then it may abort + // the handshake. + // + // GetClientCertificate may be called multiple times for the same + // connection if renegotiation occurs or if TLS 1.3 is in use. + // + // Once a Certificate is returned it should not be modified. + GetClientCertificate func(*CertificateRequestInfo) (*Certificate, error) + + // GetConfigForClient, if not nil, is called after a ClientHello is + // received from a client. It may return a non-nil Config in order to + // change the Config that will be used to handle this connection. If + // the returned Config is nil, the original Config will be used. The + // Config returned by this callback may not be subsequently modified. + // + // If GetConfigForClient is nil, the Config passed to Server() will be + // used for all connections. + // + // If SessionTicketKey was explicitly set on the returned Config, or if + // SetSessionTicketKeys was called on the returned Config, those keys will + // be used. Otherwise, the original Config keys will be used (and possibly + // rotated if they are automatically managed). + GetConfigForClient func(*ClientHelloInfo) (*Config, error) + + // VerifyPeerCertificate, if not nil, is called after normal + // certificate verification by either a TLS client or server. It + // receives the raw ASN.1 certificates provided by the peer and also + // any verified chains that normal processing found. If it returns a + // non-nil error, the handshake is aborted and that error results. + // + // If normal verification fails then the handshake will abort before + // considering this callback. If normal verification is disabled (on the + // client when InsecureSkipVerify is set, or on a server when ClientAuth is + // RequestClientCert or RequireAnyClientCert), then this callback will be + // considered but the verifiedChains argument will always be nil. When + // ClientAuth is NoClientCert, this callback is not called on the server. + // rawCerts may be empty on the server if ClientAuth is RequestClientCert or + // VerifyClientCertIfGiven. + // + // This callback is not invoked on resumed connections, as certificates are + // not re-verified on resumption. + // + // verifiedChains and its contents should not be modified. + VerifyPeerCertificate func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error + + // VerifyConnection, if not nil, is called after normal certificate + // verification and after VerifyPeerCertificate by either a TLS client + // or server. If it returns a non-nil error, the handshake is aborted + // and that error results. + // + // If normal verification fails then the handshake will abort before + // considering this callback. This callback will run for all connections, + // including resumptions, regardless of InsecureSkipVerify or ClientAuth + // settings. + VerifyConnection func(ConnectionState) error + + // RootCAs defines the set of root certificate authorities + // that clients use when verifying server certificates. + // If RootCAs is nil, TLS uses the host's root CA set. + RootCAs *x509.CertPool + + // NextProtos is a list of supported application level protocols, in + // order of preference. If both peers support ALPN, the selected + // protocol will be one from this list, and the connection will fail + // if there is no mutually supported protocol. If NextProtos is empty + // or the peer doesn't support ALPN, the connection will succeed and + // ConnectionState.NegotiatedProtocol will be empty. + NextProtos []string + + // ApplicationSettings is a set of application settings (ALPS) to use + // with each application protocol (ALPN). + ApplicationSettings map[string][]byte // [uTLS] + + // ServerName is used to verify the hostname on the returned + // certificates unless InsecureSkipVerify is given. It is also included + // in the client's handshake to support virtual hosting unless it is + // an IP address. + ServerName string + + // ClientAuth determines the server's policy for + // TLS Client Authentication. The default is NoClientCert. + ClientAuth ClientAuthType + + // ClientCAs defines the set of root certificate authorities + // that servers use if required to verify a client certificate + // by the policy in ClientAuth. + ClientCAs *x509.CertPool + + // InsecureSkipVerify controls whether a client verifies the server's + // certificate chain and host name. If InsecureSkipVerify is true, crypto/tls + // accepts any certificate presented by the server and any host name in that + // certificate. In this mode, TLS is susceptible to machine-in-the-middle + // attacks unless custom verification is used. This should be used only for + // testing or in combination with VerifyConnection or VerifyPeerCertificate. + InsecureSkipVerify bool + + // InsecureSkipTimeVerify controls whether a client verifies the server's + // certificate chain against time. If InsecureSkipTimeVerify is true, + // crypto/tls accepts the certificate even when it is expired. + // + // This field is ignored when InsecureSkipVerify is true. + InsecureSkipTimeVerify bool // [uTLS] + + // OmitEmptyPsk determines whether utls will automatically conceal + // the psk extension when it is empty. When the psk extension is empty, the + // browser omits it from the client hello. Utls can mimic this behavior, + // but it deviates from the provided client hello specification, rendering + // it unsuitable as the default behavior. Users have the option to enable + // this behavior at their own discretion. + OmitEmptyPsk bool // [uTLS] + + // InsecureServerNameToVerify is used to verify the hostname on the returned + // certificates. It is intended to use with spoofed ServerName. + // If InsecureServerNameToVerify is "*", crypto/tls will do normal + // certificate validation but ignore certifacate's DNSName. + // + // This field is ignored when InsecureSkipVerify is true. + InsecureServerNameToVerify string // [uTLS] + + // PreferSkipResumptionOnNilExtension controls the behavior when session resumption is enabled but the corresponding session extensions are nil. + // + // To successfully use session resumption, ensure that the following requirements are met: + // - SessionTicketsDisabled is set to false + // - ClientSessionCache is non-nil + // - For TLS 1.2, SessionTicketExtension is non-nil + // - For TLS 1.3, PreSharedKeyExtension is non-nil + // + // There may be cases where users enable session resumption (SessionTicketsDisabled: false && ClientSessionCache: non-nil), but they do not provide SessionTicketExtension or PreSharedKeyExtension in the ClientHelloSpec. This could be intentional or accidental. + // + // By default, utls throws an exception in such scenarios. Set this to true to skip the resumption and suppress the exception. + PreferSkipResumptionOnNilExtension bool // [uTLS] + + // CipherSuites is a list of enabled TLS 1.0–1.2 cipher suites. The order of + // the list is ignored. Note that TLS 1.3 ciphersuites are not configurable. + // + // If CipherSuites is nil, a safe default list is used. The default cipher + // suites might change over time. In Go 1.22 RSA key exchange based cipher + // suites were removed from the default list, but can be re-added with the + // GODEBUG setting tlsrsakex=1. In Go 1.23 3DES cipher suites were removed + // from the default list, but can be re-added with the GODEBUG setting + // tls3des=1. + CipherSuites []uint16 + + // PreferServerCipherSuites is a legacy field and has no effect. + // + // It used to control whether the server would follow the client's or the + // server's preference. Servers now select the best mutually supported + // cipher suite based on logic that takes into account inferred client + // hardware, server hardware, and security. + // + // Deprecated: PreferServerCipherSuites is ignored. + PreferServerCipherSuites bool + + // SessionTicketsDisabled may be set to true to disable session ticket and + // PSK (resumption) support. Note that on clients, session ticket support is + // also disabled if ClientSessionCache is nil. + SessionTicketsDisabled bool + + // SessionTicketKey is used by TLS servers to provide session resumption. + // See RFC 5077 and the PSK mode of RFC 8446. If zero, it will be filled + // with random data before the first server handshake. + // + // Deprecated: if this field is left at zero, session ticket keys will be + // automatically rotated every day and dropped after seven days. For + // customizing the rotation schedule or synchronizing servers that are + // terminating connections for the same host, use SetSessionTicketKeys. + SessionTicketKey [32]byte + + // ClientSessionCache is a cache of ClientSessionState entries for TLS + // session resumption. It is only used by clients. + ClientSessionCache ClientSessionCache + + // UnwrapSession is called on the server to turn a ticket/identity + // previously produced by [WrapSession] into a usable session. + // + // UnwrapSession will usually either decrypt a session state in the ticket + // (for example with [Config.EncryptTicket]), or use the ticket as a handle + // to recover a previously stored state. It must use [ParseSessionState] to + // deserialize the session state. + // + // If UnwrapSession returns an error, the connection is terminated. If it + // returns (nil, nil), the session is ignored. crypto/tls may still choose + // not to resume the returned session. + UnwrapSession func(identity []byte, cs ConnectionState) (*SessionState, error) + + // WrapSession is called on the server to produce a session ticket/identity. + // + // WrapSession must serialize the session state with [SessionState.Bytes]. + // It may then encrypt the serialized state (for example with + // [Config.DecryptTicket]) and use it as the ticket, or store the state and + // return a handle for it. + // + // If WrapSession returns an error, the connection is terminated. + // + // Warning: the return value will be exposed on the wire and to clients in + // plaintext. The application is in charge of encrypting and authenticating + // it (and rotating keys) or returning high-entropy identifiers. Failing to + // do so correctly can compromise current, previous, and future connections + // depending on the protocol version. + WrapSession func(ConnectionState, *SessionState) ([]byte, error) + + // MinVersion contains the minimum TLS version that is acceptable. + // + // By default, TLS 1.2 is currently used as the minimum. TLS 1.0 is the + // minimum supported by this package. + // + // The server-side default can be reverted to TLS 1.0 by including the value + // "tls10server=1" in the GODEBUG environment variable. + MinVersion uint16 + + // MaxVersion contains the maximum TLS version that is acceptable. + // + // By default, the maximum version supported by this package is used, + // which is currently TLS 1.3. + MaxVersion uint16 + + // CurvePreferences contains a set of supported key exchange mechanisms. + // The name refers to elliptic curves for legacy reasons, see [CurveID]. + // The order of the list is ignored, and key exchange mechanisms are chosen + // from this list using an internal preference order. If empty, the default + // will be used. + // + // From Go 1.24, the default includes the [X25519MLKEM768] hybrid + // post-quantum key exchange. To disable it, set CurvePreferences explicitly + // or use the GODEBUG=tlsmlkem=0 environment variable. + CurvePreferences []CurveID + + // PQSignatureSchemesEnabled controls whether additional post-quantum + // signature schemes are supported for peer certificates. For available + // signature schemes, see tls_cf.go. + PQSignatureSchemesEnabled bool // [UTLS] ported from cloudflare/go + + // DynamicRecordSizingDisabled disables adaptive sizing of TLS records. + // When true, the largest possible TLS record size is always used. When + // false, the size of TLS records may be adjusted in an attempt to + // improve latency. + DynamicRecordSizingDisabled bool + + // Renegotiation controls what types of renegotiation are supported. + // The default, none, is correct for the vast majority of applications. + Renegotiation RenegotiationSupport + + // KeyLogWriter optionally specifies a destination for TLS master secrets + // in NSS key log format that can be used to allow external programs + // such as Wireshark to decrypt TLS connections. + // See https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/Key_Log_Format. + // Use of KeyLogWriter compromises security and should only be + // used for debugging. + KeyLogWriter io.Writer + + // EncryptedClientHelloConfigList is a serialized ECHConfigList. If + // provided, clients will attempt to connect to servers using Encrypted + // Client Hello (ECH) using one of the provided ECHConfigs. + // + // Servers do not use this field. In order to configure ECH for servers, see + // the EncryptedClientHelloKeys field. + // + // If the list contains no valid ECH configs, the handshake will fail + // and return an error. + // + // If EncryptedClientHelloConfigList is set, MinVersion, if set, must + // be VersionTLS13. + // + // When EncryptedClientHelloConfigList is set, the handshake will only + // succeed if ECH is successfully negotiated. If the server rejects ECH, + // an ECHRejectionError error will be returned, which may contain a new + // ECHConfigList that the server suggests using. + // + // How this field is parsed may change in future Go versions, if the + // encoding described in the final Encrypted Client Hello RFC changes. + EncryptedClientHelloConfigList []byte + + // EncryptedClientHelloRejectionVerify, if not nil, is called when ECH is + // rejected by the remote server, in order to verify the ECH provider + // certificate in the outer ClientHello. If it returns a non-nil error, the + // handshake is aborted and that error results. + // + // On the server side this field is not used. + // + // Unlike VerifyPeerCertificate and VerifyConnection, normal certificate + // verification will not be performed before calling + // EncryptedClientHelloRejectionVerify. + // + // If EncryptedClientHelloRejectionVerify is nil and ECH is rejected, the + // roots in RootCAs will be used to verify the ECH providers public + // certificate. VerifyPeerCertificate and VerifyConnection are not called + // when ECH is rejected, even if set, and InsecureSkipVerify is ignored. + EncryptedClientHelloRejectionVerify func(ConnectionState) error + + // EncryptedClientHelloKeys are the ECH keys to use when a client + // attempts ECH. + // + // If EncryptedClientHelloKeys is set, MinVersion, if set, must be + // VersionTLS13. + // + // If a client attempts ECH, but it is rejected by the server, the server + // will send a list of configs to retry based on the set of + // EncryptedClientHelloKeys which have the SendAsRetry field set. + // + // On the client side, this field is ignored. In order to configure ECH for + // clients, see the EncryptedClientHelloConfigList field. + EncryptedClientHelloKeys []EncryptedClientHelloKey + + // mutex protects sessionTicketKeys and autoSessionTicketKeys. + mutex sync.RWMutex + // sessionTicketKeys contains zero or more ticket keys. If set, it means + // the keys were set with SessionTicketKey or SetSessionTicketKeys. The + // first key is used for new tickets and any subsequent keys can be used to + // decrypt old tickets. The slice contents are not protected by the mutex + // and are immutable. + sessionTicketKeys []ticketKey + // autoSessionTicketKeys is like sessionTicketKeys but is owned by the + // auto-rotation logic. See Config.ticketKeys. + autoSessionTicketKeys []ticketKey +} + +// EncryptedClientHelloKey holds a private key that is associated +// with a specific ECH config known to a client. +type EncryptedClientHelloKey struct { + // Config should be a marshalled ECHConfig associated with PrivateKey. This + // must match the config provided to clients byte-for-byte. The config + // should only specify the DHKEM(X25519, HKDF-SHA256) KEM ID (0x0020), the + // HKDF-SHA256 KDF ID (0x0001), and a subset of the following AEAD IDs: + // AES-128-GCM (0x0000), AES-256-GCM (0x0001), ChaCha20Poly1305 (0x0002). + Config []byte + // PrivateKey should be a marshalled private key. Currently, we expect + // this to be the output of [ecdh.PrivateKey.Bytes]. + PrivateKey []byte + // SendAsRetry indicates if Config should be sent as part of the list of + // retry configs when ECH is requested by the client but rejected by the + // server. + SendAsRetry bool +} + +const ( + // ticketKeyLifetime is how long a ticket key remains valid and can be used to + // resume a client connection. + ticketKeyLifetime = 7 * 24 * time.Hour // 7 days + + // ticketKeyRotation is how often the server should rotate the session ticket key + // that is used for new tickets. + ticketKeyRotation = 24 * time.Hour +) + +// ticketKey is the internal representation of a session ticket key. +type ticketKey struct { + aesKey [16]byte + hmacKey [16]byte + // created is the time at which this ticket key was created. See Config.ticketKeys. + created time.Time +} + +// ticketKeyFromBytes converts from the external representation of a session +// ticket key to a ticketKey. Externally, session ticket keys are 32 random +// bytes and this function expands that into sufficient name and key material. +func (c *Config) ticketKeyFromBytes(b [32]byte) (key ticketKey) { + hashed := sha512.Sum512(b[:]) + // The first 16 bytes of the hash used to be exposed on the wire as a ticket + // prefix. They MUST NOT be used as a secret. In the future, it would make + // sense to use a proper KDF here, like HKDF with a fixed salt. + const legacyTicketKeyNameLen = 16 + copy(key.aesKey[:], hashed[legacyTicketKeyNameLen:]) + copy(key.hmacKey[:], hashed[legacyTicketKeyNameLen+len(key.aesKey):]) + key.created = c.time() + return key +} + +// maxSessionTicketLifetime is the maximum allowed lifetime of a TLS 1.3 session +// ticket, and the lifetime we set for all tickets we send. +const maxSessionTicketLifetime = 7 * 24 * time.Hour + +// Clone returns a shallow clone of c or nil if c is nil. It is safe to clone a [Config] that is +// being used concurrently by a TLS client or server. +func (c *Config) Clone() *Config { + if c == nil { + return nil + } + c.mutex.RLock() + defer c.mutex.RUnlock() + return &Config{ + Rand: c.Rand, + Time: c.Time, + Certificates: c.Certificates, + NameToCertificate: c.NameToCertificate, + GetCertificate: c.GetCertificate, + GetClientCertificate: c.GetClientCertificate, + GetConfigForClient: c.GetConfigForClient, + VerifyPeerCertificate: c.VerifyPeerCertificate, + VerifyConnection: c.VerifyConnection, + RootCAs: c.RootCAs, + NextProtos: c.NextProtos, + ApplicationSettings: c.ApplicationSettings, + ServerName: c.ServerName, + ClientAuth: c.ClientAuth, + ClientCAs: c.ClientCAs, + InsecureSkipVerify: c.InsecureSkipVerify, + InsecureSkipTimeVerify: c.InsecureSkipTimeVerify, + InsecureServerNameToVerify: c.InsecureServerNameToVerify, + OmitEmptyPsk: c.OmitEmptyPsk, + CipherSuites: c.CipherSuites, + PreferServerCipherSuites: c.PreferServerCipherSuites, + SessionTicketsDisabled: c.SessionTicketsDisabled, + SessionTicketKey: c.SessionTicketKey, + ClientSessionCache: c.ClientSessionCache, + UnwrapSession: c.UnwrapSession, + WrapSession: c.WrapSession, + MinVersion: c.MinVersion, + MaxVersion: c.MaxVersion, + CurvePreferences: c.CurvePreferences, + PQSignatureSchemesEnabled: c.PQSignatureSchemesEnabled, // [UTLS] + DynamicRecordSizingDisabled: c.DynamicRecordSizingDisabled, + Renegotiation: c.Renegotiation, + KeyLogWriter: c.KeyLogWriter, + EncryptedClientHelloConfigList: c.EncryptedClientHelloConfigList, + EncryptedClientHelloRejectionVerify: c.EncryptedClientHelloRejectionVerify, + EncryptedClientHelloKeys: c.EncryptedClientHelloKeys, + sessionTicketKeys: c.sessionTicketKeys, + autoSessionTicketKeys: c.autoSessionTicketKeys, + + PreferSkipResumptionOnNilExtension: c.PreferSkipResumptionOnNilExtension, // [UTLS] + } +} + +// deprecatedSessionTicketKey is set as the prefix of SessionTicketKey if it was +// randomized for backwards compatibility but is not in use. +var deprecatedSessionTicketKey = []byte("DEPRECATED") + +// initLegacySessionTicketKeyRLocked ensures the legacy SessionTicketKey field is +// randomized if empty, and that sessionTicketKeys is populated from it otherwise. +func (c *Config) initLegacySessionTicketKeyRLocked() { + // Don't write if SessionTicketKey is already defined as our deprecated string, + // or if it is defined by the user but sessionTicketKeys is already set. + if c.SessionTicketKey != [32]byte{} && + (bytes.HasPrefix(c.SessionTicketKey[:], deprecatedSessionTicketKey) || len(c.sessionTicketKeys) > 0) { + return + } + + // We need to write some data, so get an exclusive lock and re-check any conditions. + c.mutex.RUnlock() + defer c.mutex.RLock() + c.mutex.Lock() + defer c.mutex.Unlock() + if c.SessionTicketKey == [32]byte{} { + if _, err := io.ReadFull(c.rand(), c.SessionTicketKey[:]); err != nil { + panic(fmt.Sprintf("tls: unable to generate random session ticket key: %v", err)) + } + // Write the deprecated prefix at the beginning so we know we created + // it. This key with the DEPRECATED prefix isn't used as an actual + // session ticket key, and is only randomized in case the application + // reuses it for some reason. + copy(c.SessionTicketKey[:], deprecatedSessionTicketKey) + } else if !bytes.HasPrefix(c.SessionTicketKey[:], deprecatedSessionTicketKey) && len(c.sessionTicketKeys) == 0 { + c.sessionTicketKeys = []ticketKey{c.ticketKeyFromBytes(c.SessionTicketKey)} + } + +} + +// ticketKeys returns the ticketKeys for this connection. +// If configForClient has explicitly set keys, those will +// be returned. Otherwise, the keys on c will be used and +// may be rotated if auto-managed. +// During rotation, any expired session ticket keys are deleted from +// c.sessionTicketKeys. If the session ticket key that is currently +// encrypting tickets (ie. the first ticketKey in c.sessionTicketKeys) +// is not fresh, then a new session ticket key will be +// created and prepended to c.sessionTicketKeys. +func (c *Config) ticketKeys(configForClient *Config) []ticketKey { + // If the ConfigForClient callback returned a Config with explicitly set + // keys, use those, otherwise just use the original Config. + if configForClient != nil { + configForClient.mutex.RLock() + if configForClient.SessionTicketsDisabled { + return nil + } + configForClient.initLegacySessionTicketKeyRLocked() + if len(configForClient.sessionTicketKeys) != 0 { + ret := configForClient.sessionTicketKeys + configForClient.mutex.RUnlock() + return ret + } + configForClient.mutex.RUnlock() + } + + c.mutex.RLock() + defer c.mutex.RUnlock() + if c.SessionTicketsDisabled { + return nil + } + c.initLegacySessionTicketKeyRLocked() + if len(c.sessionTicketKeys) != 0 { + return c.sessionTicketKeys + } + // Fast path for the common case where the key is fresh enough. + if len(c.autoSessionTicketKeys) > 0 && c.time().Sub(c.autoSessionTicketKeys[0].created) < ticketKeyRotation { + return c.autoSessionTicketKeys + } + + // autoSessionTicketKeys are managed by auto-rotation. + c.mutex.RUnlock() + defer c.mutex.RLock() + c.mutex.Lock() + defer c.mutex.Unlock() + // Re-check the condition in case it changed since obtaining the new lock. + if len(c.autoSessionTicketKeys) == 0 || c.time().Sub(c.autoSessionTicketKeys[0].created) >= ticketKeyRotation { + var newKey [32]byte + if _, err := io.ReadFull(c.rand(), newKey[:]); err != nil { + panic(fmt.Sprintf("unable to generate random session ticket key: %v", err)) + } + valid := make([]ticketKey, 0, len(c.autoSessionTicketKeys)+1) + valid = append(valid, c.ticketKeyFromBytes(newKey)) + for _, k := range c.autoSessionTicketKeys { + // While rotating the current key, also remove any expired ones. + if c.time().Sub(k.created) < ticketKeyLifetime { + valid = append(valid, k) + } + } + c.autoSessionTicketKeys = valid + } + return c.autoSessionTicketKeys +} + +// SetSessionTicketKeys updates the session ticket keys for a server. +// +// The first key will be used when creating new tickets, while all keys can be +// used for decrypting tickets. It is safe to call this function while the +// server is running in order to rotate the session ticket keys. The function +// will panic if keys is empty. +// +// Calling this function will turn off automatic session ticket key rotation. +// +// If multiple servers are terminating connections for the same host they should +// all have the same session ticket keys. If the session ticket keys leaks, +// previously recorded and future TLS connections using those keys might be +// compromised. +func (c *Config) SetSessionTicketKeys(keys [][32]byte) { + if len(keys) == 0 { + panic("tls: keys must have at least one key") + } + + newKeys := make([]ticketKey, len(keys)) + for i, bytes := range keys { + newKeys[i] = c.ticketKeyFromBytes(bytes) + } + + c.mutex.Lock() + c.sessionTicketKeys = newKeys + c.mutex.Unlock() +} + +func (c *Config) rand() io.Reader { + r := c.Rand + if r == nil { + return rand.Reader + } + return r +} + +func (c *Config) time() time.Time { + t := c.Time + if t == nil { + t = time.Now + } + return t() +} + +func (c *Config) cipherSuites() []uint16 { + if c.CipherSuites == nil { + // [uTLS] SECTION BEGIN + // if fips140tls.Required() { + // return defaultCipherSuitesFIPS + // } + // [uTLS] SECTION END + return defaultCipherSuites() + } + // [uTLS] SECTION BEGIN + // if fips140tls.Required() { + // cipherSuites := slices.Clone(c.CipherSuites) + // return slices.DeleteFunc(cipherSuites, func(id uint16) bool { + // return !slices.Contains(defaultCipherSuitesFIPS, id) + // }) + // } + // [uTLS] SECTION END + return c.CipherSuites +} + +var supportedVersions = []uint16{ + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, +} + +// roleClient and roleServer are meant to call supportedVersions and parents +// with more readability at the callsite. +const roleClient = true +const roleServer = false + +// var tls10server = godebug.New("tls10server") // [UTLS] unsupported + +func (c *Config) supportedVersions(isClient bool) []uint16 { + versions := make([]uint16, 0, len(supportedVersions)) + for _, v := range supportedVersions { + // [uTLS] SECTION BEGIN + // if fips140tls.Required() && !slices.Contains(defaultSupportedVersionsFIPS, v) { + // continue + // } + // [uTLS] SECTION END + if (c == nil || c.MinVersion == 0) && v < VersionTLS12 { + // [uTLS SECTION BEGIN] + // Disable unsupported godebug package + // if isClient || tls10server.Value() != "1" { + // continue + // } + if isClient { + continue + } + // [uTLS SECTION END] + } + if isClient && c.EncryptedClientHelloConfigList != nil && v < VersionTLS13 { + continue + } + if c != nil && c.MinVersion != 0 && v < c.MinVersion { + continue + } + if c != nil && c.MaxVersion != 0 && v > c.MaxVersion { + continue + } + versions = append(versions, v) + } + return versions +} + +func (c *Config) maxSupportedVersion(isClient bool) uint16 { + supportedVersions := c.supportedVersions(isClient) + if len(supportedVersions) == 0 { + return 0 + } + return supportedVersions[0] +} + +// supportedVersionsFromMax returns a list of supported versions derived from a +// legacy maximum version value. Note that only versions supported by this +// library are returned. Any newer peer will use supportedVersions anyway. +func supportedVersionsFromMax(maxVersion uint16) []uint16 { + versions := make([]uint16, 0, len(supportedVersions)) + for _, v := range supportedVersions { + if v > maxVersion { + continue + } + versions = append(versions, v) + } + return versions +} + +func (c *Config) curvePreferences(version uint16) []CurveID { + var curvePreferences []CurveID + // [uTLS] SECTION BEGIN + // if fips140tls.Required() { + // curvePreferences = slices.Clone(defaultCurvePreferencesFIPS) + // } else { + curvePreferences = defaultCurvePreferences() + // } + // [uTLS] SECTION END + if c != nil && len(c.CurvePreferences) != 0 { + curvePreferences = slices.DeleteFunc(curvePreferences, func(x CurveID) bool { + return !slices.Contains(c.CurvePreferences, x) + }) + } + if version < VersionTLS13 { + curvePreferences = slices.DeleteFunc(curvePreferences, isTLS13OnlyKeyExchange) + } + return curvePreferences +} + +func (c *Config) supportsCurve(version uint16, curve CurveID) bool { + for _, cc := range c.curvePreferences(version) { + if cc == curve { + return true + } + } + return false +} + +// mutualVersion returns the protocol version to use given the advertised +// versions of the peer. Priority is given to the peer preference order. +func (c *Config) mutualVersion(isClient bool, peerVersions []uint16) (uint16, bool) { + supportedVersions := c.supportedVersions(isClient) + for _, peerVersion := range peerVersions { + for _, v := range supportedVersions { + if v == peerVersion { + return v, true + } + } + } + return 0, false +} + +// errNoCertificates should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/xtls/xray-core +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname errNoCertificates +var errNoCertificates = errors.New("tls: no certificates configured") + +// getCertificate returns the best certificate for the given ClientHelloInfo, +// defaulting to the first element of c.Certificates. +func (c *Config) getCertificate(clientHello *ClientHelloInfo) (*Certificate, error) { + if c.GetCertificate != nil && + (len(c.Certificates) == 0 || len(clientHello.ServerName) > 0) { + cert, err := c.GetCertificate(clientHello) + if cert != nil || err != nil { + return cert, err + } + } + + if len(c.Certificates) == 0 { + return nil, errNoCertificates + } + + if len(c.Certificates) == 1 { + // There's only one choice, so no point doing any work. + return &c.Certificates[0], nil + } + + if c.NameToCertificate != nil { + name := strings.ToLower(clientHello.ServerName) + if cert, ok := c.NameToCertificate[name]; ok { + return cert, nil + } + if len(name) > 0 { + labels := strings.Split(name, ".") + labels[0] = "*" + wildcardName := strings.Join(labels, ".") + if cert, ok := c.NameToCertificate[wildcardName]; ok { + return cert, nil + } + } + } + + for _, cert := range c.Certificates { + if err := clientHello.SupportsCertificate(&cert); err == nil { + return &cert, nil + } + } + + // If nothing matches, return the first certificate. + return &c.Certificates[0], nil +} + +// SupportsCertificate returns nil if the provided certificate is supported by +// the client that sent the ClientHello. Otherwise, it returns an error +// describing the reason for the incompatibility. +// +// If this [ClientHelloInfo] was passed to a GetConfigForClient or GetCertificate +// callback, this method will take into account the associated [Config]. Note that +// if GetConfigForClient returns a different [Config], the change can't be +// accounted for by this method. +// +// This function will call x509.ParseCertificate unless c.Leaf is set, which can +// incur a significant performance cost. +func (chi *ClientHelloInfo) SupportsCertificate(c *Certificate) error { + // Note we don't currently support certificate_authorities nor + // signature_algorithms_cert, and don't check the algorithms of the + // signatures on the chain (which anyway are a SHOULD, see RFC 8446, + // Section 4.4.2.2). + + config := chi.config + if config == nil { + config = &Config{} + } + vers, ok := config.mutualVersion(roleServer, chi.SupportedVersions) + if !ok { + return errors.New("no mutually supported protocol versions") + } + + // If the client specified the name they are trying to connect to, the + // certificate needs to be valid for it. + if chi.ServerName != "" { + x509Cert, err := c.leaf() + if err != nil { + return fmt.Errorf("failed to parse certificate: %w", err) + } + if err := x509Cert.VerifyHostname(chi.ServerName); err != nil { + return fmt.Errorf("certificate is not valid for requested server name: %w", err) + } + } + + // supportsRSAFallback returns nil if the certificate and connection support + // the static RSA key exchange, and unsupported otherwise. The logic for + // supporting static RSA is completely disjoint from the logic for + // supporting signed key exchanges, so we just check it as a fallback. + supportsRSAFallback := func(unsupported error) error { + // TLS 1.3 dropped support for the static RSA key exchange. + if vers == VersionTLS13 { + return unsupported + } + // The static RSA key exchange works by decrypting a challenge with the + // RSA private key, not by signing, so check the PrivateKey implements + // crypto.Decrypter, like *rsa.PrivateKey does. + if priv, ok := c.PrivateKey.(crypto.Decrypter); ok { + if _, ok := priv.Public().(*rsa.PublicKey); !ok { + return unsupported + } + } else { + return unsupported + } + // Finally, there needs to be a mutual cipher suite that uses the static + // RSA key exchange instead of ECDHE. + rsaCipherSuite := selectCipherSuite(chi.CipherSuites, config.cipherSuites(), func(c *cipherSuite) bool { + if c.flags&suiteECDHE != 0 { + return false + } + if vers < VersionTLS12 && c.flags&suiteTLS12 != 0 { + return false + } + return true + }) + if rsaCipherSuite == nil { + return unsupported + } + return nil + } + + // If the client sent the signature_algorithms extension, ensure it supports + // schemes we can use with this certificate and TLS version. + if len(chi.SignatureSchemes) > 0 { + if _, err := selectSignatureScheme(vers, c, chi.SignatureSchemes); err != nil { + return supportsRSAFallback(err) + } + } + + // In TLS 1.3 we are done because supported_groups is only relevant to the + // ECDHE computation, point format negotiation is removed, cipher suites are + // only relevant to the AEAD choice, and static RSA does not exist. + if vers == VersionTLS13 { + return nil + } + + // The only signed key exchange we support is ECDHE. + if !supportsECDHE(config, vers, chi.SupportedCurves, chi.SupportedPoints) { + return supportsRSAFallback(errors.New("client doesn't support ECDHE, can only use legacy RSA key exchange")) + } + + var ecdsaCipherSuite bool + if priv, ok := c.PrivateKey.(crypto.Signer); ok { + switch pub := priv.Public().(type) { + case *ecdsa.PublicKey: + var curve CurveID + switch pub.Curve { + case elliptic.P256(): + curve = CurveP256 + case elliptic.P384(): + curve = CurveP384 + case elliptic.P521(): + curve = CurveP521 + default: + return supportsRSAFallback(unsupportedCertificateError(c)) + } + var curveOk bool + for _, c := range chi.SupportedCurves { + if c == curve && config.supportsCurve(vers, c) { + curveOk = true + break + } + } + if !curveOk { + return errors.New("client doesn't support certificate curve") + } + ecdsaCipherSuite = true + case ed25519.PublicKey: + if vers < VersionTLS12 || len(chi.SignatureSchemes) == 0 { + return errors.New("connection doesn't support Ed25519") + } + ecdsaCipherSuite = true + case *rsa.PublicKey: + default: + return supportsRSAFallback(unsupportedCertificateError(c)) + } + } else { + return supportsRSAFallback(unsupportedCertificateError(c)) + } + + // Make sure that there is a mutually supported cipher suite that works with + // this certificate. Cipher suite selection will then apply the logic in + // reverse to pick it. See also serverHandshakeState.cipherSuiteOk. + cipherSuite := selectCipherSuite(chi.CipherSuites, config.cipherSuites(), func(c *cipherSuite) bool { + if c.flags&suiteECDHE == 0 { + return false + } + if c.flags&suiteECSign != 0 { + if !ecdsaCipherSuite { + return false + } + } else { + if ecdsaCipherSuite { + return false + } + } + if vers < VersionTLS12 && c.flags&suiteTLS12 != 0 { + return false + } + return true + }) + if cipherSuite == nil { + return supportsRSAFallback(errors.New("client doesn't support any cipher suites compatible with the certificate")) + } + + return nil +} + +// SupportsCertificate returns nil if the provided certificate is supported by +// the server that sent the CertificateRequest. Otherwise, it returns an error +// describing the reason for the incompatibility. +func (cri *CertificateRequestInfo) SupportsCertificate(c *Certificate) error { + if _, err := selectSignatureScheme(cri.Version, c, cri.SignatureSchemes); err != nil { + return err + } + + if len(cri.AcceptableCAs) == 0 { + return nil + } + + for j, cert := range c.Certificate { + x509Cert := c.Leaf + // Parse the certificate if this isn't the leaf node, or if + // chain.Leaf was nil. + if j != 0 || x509Cert == nil { + var err error + if x509Cert, err = x509.ParseCertificate(cert); err != nil { + return fmt.Errorf("failed to parse certificate #%d in the chain: %w", j, err) + } + } + + for _, ca := range cri.AcceptableCAs { + if bytes.Equal(x509Cert.RawIssuer, ca) { + return nil + } + } + } + return errors.New("chain is not signed by an acceptable CA") +} + +// BuildNameToCertificate parses c.Certificates and builds c.NameToCertificate +// from the CommonName and SubjectAlternateName fields of each of the leaf +// certificates. +// +// Deprecated: NameToCertificate only allows associating a single certificate +// with a given name. Leave that field nil to let the library select the first +// compatible chain from Certificates. +func (c *Config) BuildNameToCertificate() { + c.NameToCertificate = make(map[string]*Certificate) + for i := range c.Certificates { + cert := &c.Certificates[i] + x509Cert, err := cert.leaf() + if err != nil { + continue + } + // If SANs are *not* present, some clients will consider the certificate + // valid for the name in the Common Name. + if x509Cert.Subject.CommonName != "" && len(x509Cert.DNSNames) == 0 { + c.NameToCertificate[x509Cert.Subject.CommonName] = cert + } + for _, san := range x509Cert.DNSNames { + c.NameToCertificate[san] = cert + } + } +} + +const ( + keyLogLabelTLS12 = "CLIENT_RANDOM" + keyLogLabelClientHandshake = "CLIENT_HANDSHAKE_TRAFFIC_SECRET" + keyLogLabelServerHandshake = "SERVER_HANDSHAKE_TRAFFIC_SECRET" + keyLogLabelClientTraffic = "CLIENT_TRAFFIC_SECRET_0" + keyLogLabelServerTraffic = "SERVER_TRAFFIC_SECRET_0" +) + +func (c *Config) writeKeyLog(label string, clientRandom, secret []byte) error { + if c.KeyLogWriter == nil { + return nil + } + + logLine := fmt.Appendf(nil, "%s %x %x\n", label, clientRandom, secret) + + writerMutex.Lock() + _, err := c.KeyLogWriter.Write(logLine) + writerMutex.Unlock() + + return err +} + +// writerMutex protects all KeyLogWriters globally. It is rarely enabled, +// and is only for debugging, so a global mutex saves space. +var writerMutex sync.Mutex + +// A Certificate is a chain of one or more certificates, leaf first. +type Certificate struct { + Certificate [][]byte + // PrivateKey contains the private key corresponding to the public key in + // Leaf. This must implement crypto.Signer with an RSA, ECDSA or Ed25519 PublicKey. + // For a server up to TLS 1.2, it can also implement crypto.Decrypter with + // an RSA PublicKey. + PrivateKey crypto.PrivateKey + // SupportedSignatureAlgorithms is an optional list restricting what + // signature algorithms the PrivateKey can be used for. + SupportedSignatureAlgorithms []SignatureScheme + // OCSPStaple contains an optional OCSP response which will be served + // to clients that request it. + OCSPStaple []byte + // SignedCertificateTimestamps contains an optional list of Signed + // Certificate Timestamps which will be served to clients that request it. + SignedCertificateTimestamps [][]byte + // Leaf is the parsed form of the leaf certificate, which may be initialized + // using x509.ParseCertificate to reduce per-handshake processing. If nil, + // the leaf certificate will be parsed as needed. + Leaf *x509.Certificate +} + +// leaf returns the parsed leaf certificate, either from c.Leaf or by parsing +// the corresponding c.Certificate[0]. +func (c *Certificate) leaf() (*x509.Certificate, error) { + if c.Leaf != nil { + return c.Leaf, nil + } + return x509.ParseCertificate(c.Certificate[0]) +} + +type handshakeMessage interface { + marshal() ([]byte, error) + unmarshal([]byte) bool +} + +type handshakeMessageWithOriginalBytes interface { + handshakeMessage + + // originalBytes should return the original bytes that were passed to + // unmarshal to create the message. If the message was not produced by + // unmarshal, it should return nil. + originalBytes() []byte +} + +// lruSessionCache is a ClientSessionCache implementation that uses an LRU +// caching strategy. +type lruSessionCache struct { + sync.Mutex + + m map[string]*list.Element + q *list.List + capacity int +} + +type lruSessionCacheEntry struct { + sessionKey string + state *ClientSessionState +} + +// NewLRUClientSessionCache returns a [ClientSessionCache] with the given +// capacity that uses an LRU strategy. If capacity is < 1, a default capacity +// is used instead. +func NewLRUClientSessionCache(capacity int) ClientSessionCache { + const defaultSessionCacheCapacity = 64 + + if capacity < 1 { + capacity = defaultSessionCacheCapacity + } + return &lruSessionCache{ + m: make(map[string]*list.Element), + q: list.New(), + capacity: capacity, + } +} + +// Put adds the provided (sessionKey, cs) pair to the cache. If cs is nil, the entry +// corresponding to sessionKey is removed from the cache instead. +func (c *lruSessionCache) Put(sessionKey string, cs *ClientSessionState) { + c.Lock() + defer c.Unlock() + + if elem, ok := c.m[sessionKey]; ok { + if cs == nil { + c.q.Remove(elem) + delete(c.m, sessionKey) + } else { + entry := elem.Value.(*lruSessionCacheEntry) + entry.state = cs + c.q.MoveToFront(elem) + } + return + } + + if c.q.Len() < c.capacity { + entry := &lruSessionCacheEntry{sessionKey, cs} + c.m[sessionKey] = c.q.PushFront(entry) + return + } + + elem := c.q.Back() + entry := elem.Value.(*lruSessionCacheEntry) + delete(c.m, entry.sessionKey) + entry.sessionKey = sessionKey + entry.state = cs + c.q.MoveToFront(elem) + c.m[sessionKey] = elem +} + +// Get returns the [ClientSessionState] value associated with a given key. It +// returns (nil, false) if no value is found. +func (c *lruSessionCache) Get(sessionKey string) (*ClientSessionState, bool) { + c.Lock() + defer c.Unlock() + + if elem, ok := c.m[sessionKey]; ok { + c.q.MoveToFront(elem) + return elem.Value.(*lruSessionCacheEntry).state, true + } + return nil, false +} + +var emptyConfig Config + +func defaultConfig() *Config { + return &emptyConfig +} + +func unexpectedMessageError(wanted, got any) error { + return fmt.Errorf("tls: received unexpected handshake message of type %T when waiting for %T", got, wanted) +} + +// supportedSignatureAlgorithms returns the supported signature algorithms. +func supportedSignatureAlgorithms() []SignatureScheme { + // [uTLS] SECTION BEGIN + // if !fips140tls.Required() { + return defaultSupportedSignatureAlgorithms + // } + // return defaultSupportedSignatureAlgorithmsFIPS + // [uTLS] SECTION END +} + +func isSupportedSignatureAlgorithm(sigAlg SignatureScheme, supportedSignatureAlgorithms []SignatureScheme) bool { + for _, s := range supportedSignatureAlgorithms { + if s == sigAlg { + return true + } + } + return false +} + +// CertificateVerificationError is returned when certificate verification fails during the handshake. +type CertificateVerificationError struct { + // UnverifiedCertificates and its contents should not be modified. + UnverifiedCertificates []*x509.Certificate + Err error +} + +func (e *CertificateVerificationError) Error() string { + return fmt.Sprintf("tls: failed to verify certificate: %s", e.Err) +} + +func (e *CertificateVerificationError) Unwrap() error { + return e.Err +} + +// fipsAllowedChains returns chains that are allowed to be used in a TLS connection +// based on the current fips140tls enforcement setting. +// +// If fips140tls is not required, the chains are returned as-is with no processing. +// Otherwise, the returned chains are filtered to only those allowed by FIPS 140-3. +// If this results in no chains it returns an error. +func fipsAllowedChains(chains [][]*x509.Certificate) ([][]*x509.Certificate, error) { + if !fips140tls.Required() { + return chains, nil + } + + permittedChains := make([][]*x509.Certificate, 0, len(chains)) + for _, chain := range chains { + if fipsAllowChain(chain) { + permittedChains = append(permittedChains, chain) + } + } + + if len(permittedChains) == 0 { + return nil, errors.New("tls: no FIPS compatible certificate chains found") + } + + return permittedChains, nil +} + +func fipsAllowChain(chain []*x509.Certificate) bool { + if len(chain) == 0 { + return false + } + + for _, cert := range chain { + if !fipsAllowCert(cert) { + return false + } + } + + return true +} + +func fipsAllowCert(c *x509.Certificate) bool { + // The key must be RSA 2048, RSA 3072, RSA 4096, + // or ECDSA P-256, P-384, P-521. + switch k := c.PublicKey.(type) { + case *rsa.PublicKey: + size := k.N.BitLen() + return size == 2048 || size == 3072 || size == 4096 + case *ecdsa.PublicKey: + return k.Curve == elliptic.P256() || k.Curve == elliptic.P384() || k.Curve == elliptic.P521() + } + + return false +} diff --git a/backend/vendor/github.com/enetx/utls/common_string.go b/backend/vendor/github.com/enetx/utls/common_string.go new file mode 100644 index 0000000..e15dd48 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/common_string.go @@ -0,0 +1,120 @@ +// Code generated by "stringer -linecomment -type=SignatureScheme,CurveID,ClientAuthType -output=common_string.go"; DO NOT EDIT. + +package tls + +import "strconv" + +func _() { + // An "invalid array index" compiler error signifies that the constant values have changed. + // Re-run the stringer command to generate them again. + var x [1]struct{} + _ = x[PKCS1WithSHA256-1025] + _ = x[PKCS1WithSHA384-1281] + _ = x[PKCS1WithSHA512-1537] + _ = x[PSSWithSHA256-2052] + _ = x[PSSWithSHA384-2053] + _ = x[PSSWithSHA512-2054] + _ = x[ECDSAWithP256AndSHA256-1027] + _ = x[ECDSAWithP384AndSHA384-1283] + _ = x[ECDSAWithP521AndSHA512-1539] + _ = x[Ed25519-2055] + _ = x[PKCS1WithSHA1-513] + _ = x[ECDSAWithSHA1-515] +} + +const ( + _SignatureScheme_name_0 = "PKCS1WithSHA1" + _SignatureScheme_name_1 = "ECDSAWithSHA1" + _SignatureScheme_name_2 = "PKCS1WithSHA256" + _SignatureScheme_name_3 = "ECDSAWithP256AndSHA256" + _SignatureScheme_name_4 = "PKCS1WithSHA384" + _SignatureScheme_name_5 = "ECDSAWithP384AndSHA384" + _SignatureScheme_name_6 = "PKCS1WithSHA512" + _SignatureScheme_name_7 = "ECDSAWithP521AndSHA512" + _SignatureScheme_name_8 = "PSSWithSHA256PSSWithSHA384PSSWithSHA512Ed25519" +) + +var ( + _SignatureScheme_index_8 = [...]uint8{0, 13, 26, 39, 46} +) + +func (i SignatureScheme) String() string { + switch { + case i == 513: + return _SignatureScheme_name_0 + case i == 515: + return _SignatureScheme_name_1 + case i == 1025: + return _SignatureScheme_name_2 + case i == 1027: + return _SignatureScheme_name_3 + case i == 1281: + return _SignatureScheme_name_4 + case i == 1283: + return _SignatureScheme_name_5 + case i == 1537: + return _SignatureScheme_name_6 + case i == 1539: + return _SignatureScheme_name_7 + case 2052 <= i && i <= 2055: + i -= 2052 + return _SignatureScheme_name_8[_SignatureScheme_index_8[i]:_SignatureScheme_index_8[i+1]] + default: + return "SignatureScheme(" + strconv.FormatInt(int64(i), 10) + ")" + } +} +func _() { + // An "invalid array index" compiler error signifies that the constant values have changed. + // Re-run the stringer command to generate them again. + var x [1]struct{} + _ = x[CurveP256-23] + _ = x[CurveP384-24] + _ = x[CurveP521-25] + _ = x[X25519-29] + _ = x[X25519MLKEM768-4588] +} + +const ( + _CurveID_name_0 = "CurveP256CurveP384CurveP521" + _CurveID_name_1 = "X25519" + _CurveID_name_2 = "X25519MLKEM768" +) + +var ( + _CurveID_index_0 = [...]uint8{0, 9, 18, 27} +) + +func (i CurveID) String() string { + switch { + case 23 <= i && i <= 25: + i -= 23 + return _CurveID_name_0[_CurveID_index_0[i]:_CurveID_index_0[i+1]] + case i == 29: + return _CurveID_name_1 + case i == 4588: + return _CurveID_name_2 + default: + return "CurveID(" + strconv.FormatInt(int64(i), 10) + ")" + } +} +func _() { + // An "invalid array index" compiler error signifies that the constant values have changed. + // Re-run the stringer command to generate them again. + var x [1]struct{} + _ = x[NoClientCert-0] + _ = x[RequestClientCert-1] + _ = x[RequireAnyClientCert-2] + _ = x[VerifyClientCertIfGiven-3] + _ = x[RequireAndVerifyClientCert-4] +} + +const _ClientAuthType_name = "NoClientCertRequestClientCertRequireAnyClientCertVerifyClientCertIfGivenRequireAndVerifyClientCert" + +var _ClientAuthType_index = [...]uint8{0, 12, 29, 49, 72, 98} + +func (i ClientAuthType) String() string { + if i < 0 || i >= ClientAuthType(len(_ClientAuthType_index)-1) { + return "ClientAuthType(" + strconv.FormatInt(int64(i), 10) + ")" + } + return _ClientAuthType_name[_ClientAuthType_index[i]:_ClientAuthType_index[i+1]] +} diff --git a/backend/vendor/github.com/enetx/utls/conn.go b/backend/vendor/github.com/enetx/utls/conn.go new file mode 100644 index 0000000..f761cca --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/conn.go @@ -0,0 +1,1701 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// TLS low level connection and record layer + +package tls + +import ( + "bytes" + "context" + "crypto/cipher" + "crypto/subtle" + "crypto/x509" + "errors" + "fmt" + "hash" + "io" + "net" + "sync" + "sync/atomic" + "time" +) + +// A Conn represents a secured connection. +// It implements the net.Conn interface. +type Conn struct { + // constant + conn net.Conn + isClient bool + handshakeFn func(context.Context) error // (*Conn).clientHandshake or serverHandshake + quic *quicState // nil for non-QUIC connections + + // isHandshakeComplete is true if the connection is currently transferring + // application data (i.e. is not currently processing a handshake). + // isHandshakeComplete is true implies handshakeErr == nil. + isHandshakeComplete atomic.Bool + // constant after handshake; protected by handshakeMutex + handshakeMutex sync.Mutex + handshakeErr error // error resulting from handshake + vers uint16 // TLS version + haveVers bool // version has been negotiated + config *Config // configuration passed to constructor + // handshakes counts the number of handshakes performed on the + // connection so far. If renegotiation is disabled then this is either + // zero or one. + handshakes int + extMasterSecret bool + didResume bool // whether this connection was a session resumption + didHRR bool // whether a HelloRetryRequest was sent/received + cipherSuite uint16 + curveID CurveID + ocspResponse []byte // stapled OCSP response + scts [][]byte // signed certificate timestamps from server + peerCertificates []*x509.Certificate + // activeCertHandles contains the cache handles to certificates in + // peerCertificates that are used to track active references. + activeCertHandles []*activeCert + // verifiedChains contains the certificate chains that we built, as + // opposed to the ones presented by the server. + verifiedChains [][]*x509.Certificate + // serverName contains the server name indicated by the client, if any. + serverName string + // secureRenegotiation is true if the server echoed the secure + // renegotiation extension. (This is meaningless as a server because + // renegotiation is not supported in that case.) + secureRenegotiation bool + // ekm is a closure for exporting keying material. + ekm func(label string, context []byte, length int) ([]byte, error) + // resumptionSecret is the resumption_master_secret for handling + // or sending NewSessionTicket messages. + resumptionSecret []byte + echAccepted bool + + // ticketKeys is the set of active session ticket keys for this + // connection. The first one is used to encrypt new tickets and + // all are tried to decrypt tickets. + ticketKeys []ticketKey + + // clientFinishedIsFirst is true if the client sent the first Finished + // message during the most recent handshake. This is recorded because + // the first transmitted Finished message is the tls-unique + // channel-binding value. + clientFinishedIsFirst bool + + // closeNotifyErr is any error from sending the alertCloseNotify record. + closeNotifyErr error + // closeNotifySent is true if the Conn attempted to send an + // alertCloseNotify record. + closeNotifySent bool + + // clientFinished and serverFinished contain the Finished message sent + // by the client or server in the most recent handshake. This is + // retained to support the renegotiation extension and tls-unique + // channel-binding. + clientFinished [12]byte + serverFinished [12]byte + + // clientProtocol is the negotiated ALPN protocol. + clientProtocol string + + utls utlsConnExtraFields // [UTLS] used for extensive things such as ALPS, PSK, etc + + // input/output + in, out halfConn + rawInput bytes.Buffer // raw input, starting with a record header + input bytes.Reader // application data waiting to be read, from rawInput.Next + hand bytes.Buffer // handshake data waiting to be read + buffering bool // whether records are buffered in sendBuf + sendBuf []byte // a buffer of records waiting to be sent + + // bytesSent counts the bytes of application data sent. + // packetsSent counts packets. + bytesSent int64 + packetsSent int64 + + // retryCount counts the number of consecutive non-advancing records + // received by Conn.readRecord. That is, records that neither advance the + // handshake, nor deliver application data. Protected by in.Mutex. + retryCount int + + // activeCall indicates whether Close has been call in the low bit. + // the rest of the bits are the number of goroutines in Conn.Write. + activeCall atomic.Int32 + + tmp [16]byte +} + +// Access to net.Conn methods. +// Cannot just embed net.Conn because that would +// export the struct field too. + +// LocalAddr returns the local network address. +func (c *Conn) LocalAddr() net.Addr { + return c.conn.LocalAddr() +} + +// RemoteAddr returns the remote network address. +func (c *Conn) RemoteAddr() net.Addr { + return c.conn.RemoteAddr() +} + +// SetDeadline sets the read and write deadlines associated with the connection. +// A zero value for t means [Conn.Read] and [Conn.Write] will not time out. +// After a Write has timed out, the TLS state is corrupt and all future writes will return the same error. +func (c *Conn) SetDeadline(t time.Time) error { + return c.conn.SetDeadline(t) +} + +// SetReadDeadline sets the read deadline on the underlying connection. +// A zero value for t means [Conn.Read] will not time out. +func (c *Conn) SetReadDeadline(t time.Time) error { + return c.conn.SetReadDeadline(t) +} + +// SetWriteDeadline sets the write deadline on the underlying connection. +// A zero value for t means [Conn.Write] will not time out. +// After a [Conn.Write] has timed out, the TLS state is corrupt and all future writes will return the same error. +func (c *Conn) SetWriteDeadline(t time.Time) error { + return c.conn.SetWriteDeadline(t) +} + +// NetConn returns the underlying connection that is wrapped by c. +// Note that writing to or reading from this connection directly will corrupt the +// TLS session. +func (c *Conn) NetConn() net.Conn { + return c.conn +} + +// A halfConn represents one direction of the record layer +// connection, either sending or receiving. +type halfConn struct { + sync.Mutex + + err error // first permanent error + version uint16 // protocol version + cipher any // cipher algorithm + mac hash.Hash + seq [8]byte // 64-bit sequence number + + scratchBuf [13]byte // to avoid allocs; interface method args escape + + nextCipher any // next encryption state + nextMac hash.Hash // next MAC algorithm + + level QUICEncryptionLevel // current QUIC encryption level + trafficSecret []byte // current TLS 1.3 traffic secret +} + +type permanentError struct { + err net.Error +} + +func (e *permanentError) Error() string { return e.err.Error() } +func (e *permanentError) Unwrap() error { return e.err } +func (e *permanentError) Timeout() bool { return e.err.Timeout() } +func (e *permanentError) Temporary() bool { return false } + +func (hc *halfConn) setErrorLocked(err error) error { + if e, ok := err.(net.Error); ok { + hc.err = &permanentError{err: e} + } else { + hc.err = err + } + return hc.err +} + +// prepareCipherSpec sets the encryption and MAC states +// that a subsequent changeCipherSpec will use. +func (hc *halfConn) prepareCipherSpec(version uint16, cipher any, mac hash.Hash) { + hc.version = version + hc.nextCipher = cipher + hc.nextMac = mac +} + +// changeCipherSpec changes the encryption and MAC states +// to the ones previously passed to prepareCipherSpec. +func (hc *halfConn) changeCipherSpec() error { + if hc.nextCipher == nil || hc.version == VersionTLS13 { + return alertInternalError + } + hc.cipher = hc.nextCipher + hc.mac = hc.nextMac + hc.nextCipher = nil + hc.nextMac = nil + for i := range hc.seq { + hc.seq[i] = 0 + } + return nil +} + +func (hc *halfConn) setTrafficSecret(suite *cipherSuiteTLS13, level QUICEncryptionLevel, secret []byte) { + hc.trafficSecret = secret + hc.level = level + key, iv := suite.trafficKey(secret) + hc.cipher = suite.aead(key, iv) + for i := range hc.seq { + hc.seq[i] = 0 + } +} + +// incSeq increments the sequence number. +func (hc *halfConn) incSeq() { + for i := 7; i >= 0; i-- { + hc.seq[i]++ + if hc.seq[i] != 0 { + return + } + } + + // Not allowed to let sequence number wrap. + // Instead, must renegotiate before it does. + // Not likely enough to bother. + panic("TLS: sequence number wraparound") +} + +// explicitNonceLen returns the number of bytes of explicit nonce or IV included +// in each record. Explicit nonces are present only in CBC modes after TLS 1.0 +// and in certain AEAD modes in TLS 1.2. +func (hc *halfConn) explicitNonceLen() int { + if hc.cipher == nil { + return 0 + } + + switch c := hc.cipher.(type) { + case cipher.Stream: + return 0 + case aead: + return c.explicitNonceLen() + case cbcMode: + // TLS 1.1 introduced a per-record explicit IV to fix the BEAST attack. + if hc.version >= VersionTLS11 { + return c.BlockSize() + } + return 0 + default: + panic("unknown cipher type") + } +} + +// extractPadding returns, in constant time, the length of the padding to remove +// from the end of payload. It also returns a byte which is equal to 255 if the +// padding was valid and 0 otherwise. See RFC 2246, Section 6.2.3.2. +func extractPadding(payload []byte) (toRemove int, good byte) { + if len(payload) < 1 { + return 0, 0 + } + + paddingLen := payload[len(payload)-1] + t := uint(len(payload)-1) - uint(paddingLen) + // if len(payload) >= (paddingLen - 1) then the MSB of t is zero + good = byte(int32(^t) >> 31) + + // The maximum possible padding length plus the actual length field + toCheck := 256 + // The length of the padded data is public, so we can use an if here + if toCheck > len(payload) { + toCheck = len(payload) + } + + for i := 0; i < toCheck; i++ { + t := uint(paddingLen) - uint(i) + // if i <= paddingLen then the MSB of t is zero + mask := byte(int32(^t) >> 31) + b := payload[len(payload)-1-i] + good &^= mask&paddingLen ^ mask&b + } + + // We AND together the bits of good and replicate the result across + // all the bits. + good &= good << 4 + good &= good << 2 + good &= good << 1 + good = uint8(int8(good) >> 7) + + // Zero the padding length on error. This ensures any unchecked bytes + // are included in the MAC. Otherwise, an attacker that could + // distinguish MAC failures from padding failures could mount an attack + // similar to POODLE in SSL 3.0: given a good ciphertext that uses a + // full block's worth of padding, replace the final block with another + // block. If the MAC check passed but the padding check failed, the + // last byte of that block decrypted to the block size. + // + // See also macAndPaddingGood logic below. + paddingLen &= good + + toRemove = int(paddingLen) + 1 + return +} + +func roundUp(a, b int) int { + return a + (b-a%b)%b +} + +// cbcMode is an interface for block ciphers using cipher block chaining. +type cbcMode interface { + cipher.BlockMode + SetIV([]byte) +} + +// decrypt authenticates and decrypts the record if protection is active at +// this stage. The returned plaintext might overlap with the input. +func (hc *halfConn) decrypt(record []byte) ([]byte, recordType, error) { + var plaintext []byte + typ := recordType(record[0]) + payload := record[recordHeaderLen:] + + // In TLS 1.3, change_cipher_spec messages are to be ignored without being + // decrypted. See RFC 8446, Appendix D.4. + if hc.version == VersionTLS13 && typ == recordTypeChangeCipherSpec { + return payload, typ, nil + } + + paddingGood := byte(255) + paddingLen := 0 + + explicitNonceLen := hc.explicitNonceLen() + + if hc.cipher != nil { + switch c := hc.cipher.(type) { + case cipher.Stream: + c.XORKeyStream(payload, payload) + case aead: + if len(payload) < explicitNonceLen { + return nil, 0, alertBadRecordMAC + } + nonce := payload[:explicitNonceLen] + if len(nonce) == 0 { + nonce = hc.seq[:] + } + payload = payload[explicitNonceLen:] + + var additionalData []byte + if hc.version == VersionTLS13 { + additionalData = record[:recordHeaderLen] + } else { + additionalData = append(hc.scratchBuf[:0], hc.seq[:]...) + additionalData = append(additionalData, record[:3]...) + n := len(payload) - c.Overhead() + additionalData = append(additionalData, byte(n>>8), byte(n)) + } + + var err error + plaintext, err = c.Open(payload[:0], nonce, payload, additionalData) + if err != nil { + return nil, 0, alertBadRecordMAC + } + case cbcMode: + blockSize := c.BlockSize() + minPayload := explicitNonceLen + roundUp(hc.mac.Size()+1, blockSize) + if len(payload)%blockSize != 0 || len(payload) < minPayload { + return nil, 0, alertBadRecordMAC + } + + if explicitNonceLen > 0 { + c.SetIV(payload[:explicitNonceLen]) + payload = payload[explicitNonceLen:] + } + c.CryptBlocks(payload, payload) + + // In a limited attempt to protect against CBC padding oracles like + // Lucky13, the data past paddingLen (which is secret) is passed to + // the MAC function as extra data, to be fed into the HMAC after + // computing the digest. This makes the MAC roughly constant time as + // long as the digest computation is constant time and does not + // affect the subsequent write, modulo cache effects. + paddingLen, paddingGood = extractPadding(payload) + default: + panic("unknown cipher type") + } + + if hc.version == VersionTLS13 { + if typ != recordTypeApplicationData { + return nil, 0, alertUnexpectedMessage + } + if len(plaintext) > maxPlaintext+1 { + return nil, 0, alertRecordOverflow + } + // Remove padding and find the ContentType scanning from the end. + for i := len(plaintext) - 1; i >= 0; i-- { + if plaintext[i] != 0 { + typ = recordType(plaintext[i]) + plaintext = plaintext[:i] + break + } + if i == 0 { + return nil, 0, alertUnexpectedMessage + } + } + } + } else { + plaintext = payload + } + + if hc.mac != nil { + macSize := hc.mac.Size() + if len(payload) < macSize { + return nil, 0, alertBadRecordMAC + } + + n := len(payload) - macSize - paddingLen + n = subtle.ConstantTimeSelect(int(uint32(n)>>31), 0, n) // if n < 0 { n = 0 } + record[3] = byte(n >> 8) + record[4] = byte(n) + remoteMAC := payload[n : n+macSize] + localMAC := tls10MAC(hc.mac, hc.scratchBuf[:0], hc.seq[:], record[:recordHeaderLen], payload[:n], payload[n+macSize:]) + + // This is equivalent to checking the MACs and paddingGood + // separately, but in constant-time to prevent distinguishing + // padding failures from MAC failures. Depending on what value + // of paddingLen was returned on bad padding, distinguishing + // bad MAC from bad padding can lead to an attack. + // + // See also the logic at the end of extractPadding. + macAndPaddingGood := subtle.ConstantTimeCompare(localMAC, remoteMAC) & int(paddingGood) + if macAndPaddingGood != 1 { + return nil, 0, alertBadRecordMAC + } + + plaintext = payload[:n] + } + + hc.incSeq() + return plaintext, typ, nil +} + +// sliceForAppend extends the input slice by n bytes. head is the full extended +// slice, while tail is the appended part. If the original slice has sufficient +// capacity no allocation is performed. +func sliceForAppend(in []byte, n int) (head, tail []byte) { + if total := len(in) + n; cap(in) >= total { + head = in[:total] + } else { + head = make([]byte, total) + copy(head, in) + } + tail = head[len(in):] + return +} + +// encrypt encrypts payload, adding the appropriate nonce and/or MAC, and +// appends it to record, which must already contain the record header. +func (hc *halfConn) encrypt(record, payload []byte, rand io.Reader) ([]byte, error) { + if hc.cipher == nil { + return append(record, payload...), nil + } + + var explicitNonce []byte + if explicitNonceLen := hc.explicitNonceLen(); explicitNonceLen > 0 { + record, explicitNonce = sliceForAppend(record, explicitNonceLen) + if _, isCBC := hc.cipher.(cbcMode); !isCBC && explicitNonceLen < 16 { + // The AES-GCM construction in TLS has an explicit nonce so that the + // nonce can be random. However, the nonce is only 8 bytes which is + // too small for a secure, random nonce. Therefore we use the + // sequence number as the nonce. The 3DES-CBC construction also has + // an 8 bytes nonce but its nonces must be unpredictable (see RFC + // 5246, Appendix F.3), forcing us to use randomness. That's not + // 3DES' biggest problem anyway because the birthday bound on block + // collision is reached first due to its similarly small block size + // (see the Sweet32 attack). + copy(explicitNonce, hc.seq[:]) + } else { + if _, err := io.ReadFull(rand, explicitNonce); err != nil { + return nil, err + } + } + } + + var dst []byte + switch c := hc.cipher.(type) { + case cipher.Stream: + mac := tls10MAC(hc.mac, hc.scratchBuf[:0], hc.seq[:], record[:recordHeaderLen], payload, nil) + record, dst = sliceForAppend(record, len(payload)+len(mac)) + c.XORKeyStream(dst[:len(payload)], payload) + c.XORKeyStream(dst[len(payload):], mac) + case aead: + nonce := explicitNonce + if len(nonce) == 0 { + nonce = hc.seq[:] + } + + if hc.version == VersionTLS13 { + record = append(record, payload...) + + // Encrypt the actual ContentType and replace the plaintext one. + record = append(record, record[0]) + record[0] = byte(recordTypeApplicationData) + + n := len(payload) + 1 + c.Overhead() + record[3] = byte(n >> 8) + record[4] = byte(n) + + record = c.Seal(record[:recordHeaderLen], + nonce, record[recordHeaderLen:], record[:recordHeaderLen]) + } else { + additionalData := append(hc.scratchBuf[:0], hc.seq[:]...) + additionalData = append(additionalData, record[:recordHeaderLen]...) + record = c.Seal(record, nonce, payload, additionalData) + } + case cbcMode: + mac := tls10MAC(hc.mac, hc.scratchBuf[:0], hc.seq[:], record[:recordHeaderLen], payload, nil) + blockSize := c.BlockSize() + plaintextLen := len(payload) + len(mac) + paddingLen := blockSize - plaintextLen%blockSize + record, dst = sliceForAppend(record, plaintextLen+paddingLen) + copy(dst, payload) + copy(dst[len(payload):], mac) + for i := plaintextLen; i < len(dst); i++ { + dst[i] = byte(paddingLen - 1) + } + if len(explicitNonce) > 0 { + c.SetIV(explicitNonce) + } + c.CryptBlocks(dst, dst) + default: + panic("unknown cipher type") + } + + // Update length to include nonce, MAC and any block padding needed. + n := len(record) - recordHeaderLen + record[3] = byte(n >> 8) + record[4] = byte(n) + hc.incSeq() + + return record, nil +} + +// RecordHeaderError is returned when a TLS record header is invalid. +type RecordHeaderError struct { + // Msg contains a human readable string that describes the error. + Msg string + // RecordHeader contains the five bytes of TLS record header that + // triggered the error. + RecordHeader [5]byte + // Conn provides the underlying net.Conn in the case that a client + // sent an initial handshake that didn't look like TLS. + // It is nil if there's already been a handshake or a TLS alert has + // been written to the connection. + Conn net.Conn +} + +func (e RecordHeaderError) Error() string { return "tls: " + e.Msg } + +func (c *Conn) newRecordHeaderError(conn net.Conn, msg string) (err RecordHeaderError) { + err.Msg = msg + err.Conn = conn + copy(err.RecordHeader[:], c.rawInput.Bytes()) + return err +} + +func (c *Conn) readRecord() error { + return c.readRecordOrCCS(false) +} + +func (c *Conn) readChangeCipherSpec() error { + return c.readRecordOrCCS(true) +} + +// readRecordOrCCS reads one or more TLS records from the connection and +// updates the record layer state. Some invariants: +// - c.in must be locked +// - c.input must be empty +// +// During the handshake one and only one of the following will happen: +// - c.hand grows +// - c.in.changeCipherSpec is called +// - an error is returned +// +// After the handshake one and only one of the following will happen: +// - c.hand grows +// - c.input is set +// - an error is returned +func (c *Conn) readRecordOrCCS(expectChangeCipherSpec bool) error { + if c.in.err != nil { + return c.in.err + } + handshakeComplete := c.isHandshakeComplete.Load() + + // This function modifies c.rawInput, which owns the c.input memory. + if c.input.Len() != 0 { + return c.in.setErrorLocked(errors.New("tls: internal error: attempted to read record with pending application data")) + } + c.input.Reset(nil) + + if c.quic != nil { + return c.in.setErrorLocked(errors.New("tls: internal error: attempted to read record with QUIC transport")) + } + + // Read header, payload. + if err := c.readFromUntil(c.conn, recordHeaderLen); err != nil { + // RFC 8446, Section 6.1 suggests that EOF without an alertCloseNotify + // is an error, but popular web sites seem to do this, so we accept it + // if and only if at the record boundary. + if err == io.ErrUnexpectedEOF && c.rawInput.Len() == 0 { + err = io.EOF + } + if e, ok := err.(net.Error); !ok || !e.Temporary() { + c.in.setErrorLocked(err) + } + return err + } + hdr := c.rawInput.Bytes()[:recordHeaderLen] + typ := recordType(hdr[0]) + + // No valid TLS record has a type of 0x80, however SSLv2 handshakes + // start with a uint16 length where the MSB is set and the first record + // is always < 256 bytes long. Therefore typ == 0x80 strongly suggests + // an SSLv2 client. + if !handshakeComplete && typ == 0x80 { + c.sendAlert(alertProtocolVersion) + return c.in.setErrorLocked(c.newRecordHeaderError(nil, "unsupported SSLv2 handshake received")) + } + + vers := uint16(hdr[1])<<8 | uint16(hdr[2]) + expectedVers := c.vers + if expectedVers == VersionTLS13 { + // All TLS 1.3 records are expected to have 0x0303 (1.2) after + // the initial hello (RFC 8446 Section 5.1). + expectedVers = VersionTLS12 + } + n := int(hdr[3])<<8 | int(hdr[4]) + if c.haveVers && vers != expectedVers { + c.sendAlert(alertProtocolVersion) + msg := fmt.Sprintf("received record with version %x when expecting version %x", vers, expectedVers) + return c.in.setErrorLocked(c.newRecordHeaderError(nil, msg)) + } + if !c.haveVers { + // First message, be extra suspicious: this might not be a TLS + // client. Bail out before reading a full 'body', if possible. + // The current max version is 3.3 so if the version is >= 16.0, + // it's probably not real. + if (typ != recordTypeAlert && typ != recordTypeHandshake) || vers >= 0x1000 { + return c.in.setErrorLocked(c.newRecordHeaderError(c.conn, "first record does not look like a TLS handshake")) + } + } + if c.vers == VersionTLS13 && n > maxCiphertextTLS13 || n > maxCiphertext { + c.sendAlert(alertRecordOverflow) + msg := fmt.Sprintf("oversized record received with length %d", n) + return c.in.setErrorLocked(c.newRecordHeaderError(nil, msg)) + } + if err := c.readFromUntil(c.conn, recordHeaderLen+n); err != nil { + if e, ok := err.(net.Error); !ok || !e.Temporary() { + c.in.setErrorLocked(err) + } + return err + } + + // Process message. + record := c.rawInput.Next(recordHeaderLen + n) + data, typ, err := c.in.decrypt(record) + if err != nil { + return c.in.setErrorLocked(c.sendAlert(err.(alert))) + } + if len(data) > maxPlaintext { + return c.in.setErrorLocked(c.sendAlert(alertRecordOverflow)) + } + + // Application Data messages are always protected. + if c.in.cipher == nil && typ == recordTypeApplicationData { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + + if typ != recordTypeAlert && typ != recordTypeChangeCipherSpec && len(data) > 0 { + // This is a state-advancing message: reset the retry count. + c.retryCount = 0 + } + + // Handshake messages MUST NOT be interleaved with other record types in TLS 1.3. + if c.vers == VersionTLS13 && typ != recordTypeHandshake && c.hand.Len() > 0 { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + + switch typ { + default: + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + + case recordTypeAlert: + if c.quic != nil { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + if len(data) != 2 { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + if alert(data[1]) == alertCloseNotify { + return c.in.setErrorLocked(io.EOF) + } + if c.vers == VersionTLS13 { + return c.in.setErrorLocked(&net.OpError{Op: "remote error", Err: alert(data[1])}) + } + switch data[0] { + case alertLevelWarning: + // Drop the record on the floor and retry. + return c.retryReadRecord(expectChangeCipherSpec) + case alertLevelError: + return c.in.setErrorLocked(&net.OpError{Op: "remote error", Err: alert(data[1])}) + default: + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + + case recordTypeChangeCipherSpec: + if len(data) != 1 || data[0] != 1 { + return c.in.setErrorLocked(c.sendAlert(alertDecodeError)) + } + // Handshake messages are not allowed to fragment across the CCS. + if c.hand.Len() > 0 { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + // In TLS 1.3, change_cipher_spec records are ignored until the + // Finished. See RFC 8446, Appendix D.4. Note that according to Section + // 5, a server can send a ChangeCipherSpec before its ServerHello, when + // c.vers is still unset. That's not useful though and suspicious if the + // server then selects a lower protocol version, so don't allow that. + if c.vers == VersionTLS13 && !handshakeComplete { + return c.retryReadRecord(expectChangeCipherSpec) + } + if !expectChangeCipherSpec { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + if err := c.in.changeCipherSpec(); err != nil { + return c.in.setErrorLocked(c.sendAlert(err.(alert))) + } + + case recordTypeApplicationData: + if !handshakeComplete || expectChangeCipherSpec { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + // Some OpenSSL servers send empty records in order to randomize the + // CBC IV. Ignore a limited number of empty records. + if len(data) == 0 { + return c.retryReadRecord(expectChangeCipherSpec) + } + // Note that data is owned by c.rawInput, following the Next call above, + // to avoid copying the plaintext. This is safe because c.rawInput is + // not read from or written to until c.input is drained. + c.input.Reset(data) + + case recordTypeHandshake: + if len(data) == 0 || expectChangeCipherSpec { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + c.hand.Write(data) + } + + return nil +} + +// retryReadRecord recurs into readRecordOrCCS to drop a non-advancing record, like +// a warning alert, empty application_data, or a change_cipher_spec in TLS 1.3. +func (c *Conn) retryReadRecord(expectChangeCipherSpec bool) error { + c.retryCount++ + if c.retryCount > maxUselessRecords { + c.sendAlert(alertUnexpectedMessage) + return c.in.setErrorLocked(errors.New("tls: too many ignored records")) + } + return c.readRecordOrCCS(expectChangeCipherSpec) +} + +// atLeastReader reads from R, stopping with EOF once at least N bytes have been +// read. It is different from an io.LimitedReader in that it doesn't cut short +// the last Read call, and in that it considers an early EOF an error. +type atLeastReader struct { + R io.Reader + N int64 +} + +func (r *atLeastReader) Read(p []byte) (int, error) { + if r.N <= 0 { + return 0, io.EOF + } + n, err := r.R.Read(p) + r.N -= int64(n) // won't underflow unless len(p) >= n > 9223372036854775809 + if r.N > 0 && err == io.EOF { + return n, io.ErrUnexpectedEOF + } + if r.N <= 0 && err == nil { + return n, io.EOF + } + return n, err +} + +// readFromUntil reads from r into c.rawInput until c.rawInput contains +// at least n bytes or else returns an error. +func (c *Conn) readFromUntil(r io.Reader, n int) error { + if c.rawInput.Len() >= n { + return nil + } + needs := n - c.rawInput.Len() + // There might be extra input waiting on the wire. Make a best effort + // attempt to fetch it so that it can be used in (*Conn).Read to + // "predict" closeNotify alerts. + c.rawInput.Grow(needs + bytes.MinRead) + _, err := c.rawInput.ReadFrom(&atLeastReader{r, int64(needs)}) + return err +} + +// sendAlertLocked sends a TLS alert message. +func (c *Conn) sendAlertLocked(err alert) error { + if c.quic != nil { + return c.out.setErrorLocked(&net.OpError{Op: "local error", Err: err}) + } + + switch err { + case alertNoRenegotiation, alertCloseNotify: + c.tmp[0] = alertLevelWarning + default: + c.tmp[0] = alertLevelError + } + c.tmp[1] = byte(err) + + _, writeErr := c.writeRecordLocked(recordTypeAlert, c.tmp[0:2]) + if err == alertCloseNotify { + // closeNotify is a special case in that it isn't an error. + return writeErr + } + + return c.out.setErrorLocked(&net.OpError{Op: "local error", Err: err}) +} + +// sendAlert sends a TLS alert message. +func (c *Conn) sendAlert(err alert) error { + c.out.Lock() + defer c.out.Unlock() + return c.sendAlertLocked(err) +} + +const ( + // tcpMSSEstimate is a conservative estimate of the TCP maximum segment + // size (MSS). A constant is used, rather than querying the kernel for + // the actual MSS, to avoid complexity. The value here is the IPv6 + // minimum MTU (1280 bytes) minus the overhead of an IPv6 header (40 + // bytes) and a TCP header with timestamps (32 bytes). + tcpMSSEstimate = 1208 + + // recordSizeBoostThreshold is the number of bytes of application data + // sent after which the TLS record size will be increased to the + // maximum. + recordSizeBoostThreshold = 128 * 1024 +) + +// maxPayloadSizeForWrite returns the maximum TLS payload size to use for the +// next application data record. There is the following trade-off: +// +// - For latency-sensitive applications, such as web browsing, each TLS +// record should fit in one TCP segment. +// - For throughput-sensitive applications, such as large file transfers, +// larger TLS records better amortize framing and encryption overheads. +// +// A simple heuristic that works well in practice is to use small records for +// the first 1MB of data, then use larger records for subsequent data, and +// reset back to smaller records after the connection becomes idle. See "High +// Performance Web Networking", Chapter 4, or: +// https://www.igvita.com/2013/10/24/optimizing-tls-record-size-and-buffering-latency/ +// +// In the interests of simplicity and determinism, this code does not attempt +// to reset the record size once the connection is idle, however. +func (c *Conn) maxPayloadSizeForWrite(typ recordType) int { + if c.config.DynamicRecordSizingDisabled || typ != recordTypeApplicationData { + return maxPlaintext + } + + if c.bytesSent >= recordSizeBoostThreshold { + return maxPlaintext + } + + // Subtract TLS overheads to get the maximum payload size. + payloadBytes := tcpMSSEstimate - recordHeaderLen - c.out.explicitNonceLen() + if c.out.cipher != nil { + switch ciph := c.out.cipher.(type) { + case cipher.Stream: + payloadBytes -= c.out.mac.Size() + case cipher.AEAD: + payloadBytes -= ciph.Overhead() + case cbcMode: + blockSize := ciph.BlockSize() + // The payload must fit in a multiple of blockSize, with + // room for at least one padding byte. + payloadBytes = (payloadBytes & ^(blockSize - 1)) - 1 + // The MAC is appended before padding so affects the + // payload size directly. + payloadBytes -= c.out.mac.Size() + default: + panic("unknown cipher type") + } + } + if c.vers == VersionTLS13 { + payloadBytes-- // encrypted ContentType + } + + // Allow packet growth in arithmetic progression up to max. + pkt := c.packetsSent + c.packetsSent++ + if pkt > 1000 { + return maxPlaintext // avoid overflow in multiply below + } + + n := payloadBytes * int(pkt+1) + if n > maxPlaintext { + n = maxPlaintext + } + return n +} + +func (c *Conn) write(data []byte) (int, error) { + if c.buffering { + c.sendBuf = append(c.sendBuf, data...) + return len(data), nil + } + + n, err := c.conn.Write(data) + c.bytesSent += int64(n) + return n, err +} + +func (c *Conn) flush() (int, error) { + if len(c.sendBuf) == 0 { + return 0, nil + } + + n, err := c.conn.Write(c.sendBuf) + c.bytesSent += int64(n) + c.sendBuf = nil + c.buffering = false + return n, err +} + +// outBufPool pools the record-sized scratch buffers used by writeRecordLocked. +var outBufPool = sync.Pool{ + New: func() any { + return new([]byte) + }, +} + +// writeRecordLocked writes a TLS record with the given type and payload to the +// connection and updates the record layer state. +func (c *Conn) writeRecordLocked(typ recordType, data []byte) (int, error) { + if c.quic != nil { + if typ != recordTypeHandshake { + return 0, errors.New("tls: internal error: sending non-handshake message to QUIC transport") + } + c.quicWriteCryptoData(c.out.level, data) + if !c.buffering { + if _, err := c.flush(); err != nil { + return 0, err + } + } + return len(data), nil + } + + outBufPtr := outBufPool.Get().(*[]byte) + outBuf := *outBufPtr + defer func() { + // You might be tempted to simplify this by just passing &outBuf to Put, + // but that would make the local copy of the outBuf slice header escape + // to the heap, causing an allocation. Instead, we keep around the + // pointer to the slice header returned by Get, which is already on the + // heap, and overwrite and return that. + *outBufPtr = outBuf + outBufPool.Put(outBufPtr) + }() + + var n int + for len(data) > 0 { + m := len(data) + if maxPayload := c.maxPayloadSizeForWrite(typ); m > maxPayload { + m = maxPayload + } + + _, outBuf = sliceForAppend(outBuf[:0], recordHeaderLen) + outBuf[0] = byte(typ) + vers := c.vers + if vers == 0 { + // Some TLS servers fail if the record version is + // greater than TLS 1.0 for the initial ClientHello. + vers = VersionTLS10 + } else if vers == VersionTLS13 { + // TLS 1.3 froze the record layer version to 1.2. + // See RFC 8446, Section 5.1. + vers = VersionTLS12 + } + outBuf[1] = byte(vers >> 8) + outBuf[2] = byte(vers) + outBuf[3] = byte(m >> 8) + outBuf[4] = byte(m) + + var err error + outBuf, err = c.out.encrypt(outBuf, data[:m], c.config.rand()) + if err != nil { + return n, err + } + if _, err := c.write(outBuf); err != nil { + return n, err + } + n += m + data = data[m:] + } + + if typ == recordTypeChangeCipherSpec && c.vers != VersionTLS13 { + if err := c.out.changeCipherSpec(); err != nil { + return n, c.sendAlertLocked(err.(alert)) + } + } + + return n, nil +} + +// writeHandshakeRecord writes a handshake message to the connection and updates +// the record layer state. If transcript is non-nil the marshaled message is +// written to it. +func (c *Conn) writeHandshakeRecord(msg handshakeMessage, transcript transcriptHash) (int, error) { + c.out.Lock() + defer c.out.Unlock() + + data, err := msg.marshal() + if err != nil { + return 0, err + } + if transcript != nil { + transcript.Write(data) + } + + return c.writeRecordLocked(recordTypeHandshake, data) +} + +// writeChangeCipherRecord writes a ChangeCipherSpec message to the connection and +// updates the record layer state. +func (c *Conn) writeChangeCipherRecord() error { + c.out.Lock() + defer c.out.Unlock() + _, err := c.writeRecordLocked(recordTypeChangeCipherSpec, []byte{1}) + return err +} + +// readHandshakeBytes reads handshake data until c.hand contains at least n bytes. +func (c *Conn) readHandshakeBytes(n int) error { + if c.quic != nil { + return c.quicReadHandshakeBytes(n) + } + for c.hand.Len() < n { + if err := c.readRecord(); err != nil { + return err + } + } + return nil +} + +// readHandshake reads the next handshake message from +// the record layer. If transcript is non-nil, the message +// is written to the passed transcriptHash. +func (c *Conn) readHandshake(transcript transcriptHash) (any, error) { + if err := c.readHandshakeBytes(4); err != nil { + return nil, err + } + data := c.hand.Bytes() + + maxHandshakeSize := maxHandshake + // hasVers indicates we're past the first message, forcing someone trying to + // make us just allocate a large buffer to at least do the initial part of + // the handshake first. + if c.haveVers && data[0] == typeCertificate { + // Since certificate messages are likely to be the only messages that + // can be larger than maxHandshake, we use a special limit for just + // those messages. + maxHandshakeSize = maxHandshakeCertificateMsg + } + + n := int(data[1])<<16 | int(data[2])<<8 | int(data[3]) + if n > maxHandshakeSize { + c.sendAlertLocked(alertInternalError) + return nil, c.in.setErrorLocked(fmt.Errorf("tls: handshake message of length %d bytes exceeds maximum of %d bytes", n, maxHandshakeSize)) + } + if err := c.readHandshakeBytes(4 + n); err != nil { + return nil, err + } + data = c.hand.Next(4 + n) + return c.unmarshalHandshakeMessage(data, transcript) +} + +func (c *Conn) unmarshalHandshakeMessage(data []byte, transcript transcriptHash) (handshakeMessage, error) { + var m handshakeMessage + switch data[0] { + case typeHelloRequest: + m = new(helloRequestMsg) + case typeClientHello: + m = new(clientHelloMsg) + case typeServerHello: + m = new(serverHelloMsg) + case typeNewSessionTicket: + if c.vers == VersionTLS13 { + m = new(newSessionTicketMsgTLS13) + } else { + m = new(newSessionTicketMsg) + } + case typeCertificate: + if c.vers == VersionTLS13 { + m = new(certificateMsgTLS13) + } else { + m = new(certificateMsg) + } + case typeCertificateRequest: + if c.vers == VersionTLS13 { + m = new(certificateRequestMsgTLS13) + } else { + m = &certificateRequestMsg{ + hasSignatureAlgorithm: c.vers >= VersionTLS12, + } + } + case typeCertificateStatus: + m = new(certificateStatusMsg) + case typeServerKeyExchange: + m = new(serverKeyExchangeMsg) + case typeServerHelloDone: + m = new(serverHelloDoneMsg) + case typeClientKeyExchange: + m = new(clientKeyExchangeMsg) + case typeCertificateVerify: + m = &certificateVerifyMsg{ + hasSignatureAlgorithm: c.vers >= VersionTLS12, + } + case typeFinished: + m = new(finishedMsg) + // [uTLS] Commented typeEncryptedExtensions to force + // utlsHandshakeMessageType to handle it + // case typeEncryptedExtensions: + // m = new(encryptedExtensionsMsg) + case typeEndOfEarlyData: + m = new(endOfEarlyDataMsg) + case typeKeyUpdate: + m = new(keyUpdateMsg) + default: + // [UTLS SECTION BEGINS] + var err error + m, err = c.utlsHandshakeMessageType(data[0]) // see u_conn.go + if err == nil { + break + } + // [UTLS SECTION ENDS] + return nil, c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + + // The handshake message unmarshalers + // expect to be able to keep references to data, + // so pass in a fresh copy that won't be overwritten. + data = append([]byte(nil), data...) + + if !m.unmarshal(data) { + return nil, c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + + if transcript != nil { + transcript.Write(data) + } + + return m, nil +} + +var ( + errShutdown = errors.New("tls: protocol is shutdown") +) + +// Write writes data to the connection. +// +// As Write calls [Conn.Handshake], in order to prevent indefinite blocking a deadline +// must be set for both [Conn.Read] and Write before Write is called when the handshake +// has not yet completed. See [Conn.SetDeadline], [Conn.SetReadDeadline], and +// [Conn.SetWriteDeadline]. +func (c *Conn) Write(b []byte) (int, error) { + // interlock with Close below + for { + x := c.activeCall.Load() + if x&1 != 0 { + return 0, net.ErrClosed + } + if c.activeCall.CompareAndSwap(x, x+2) { + break + } + } + defer c.activeCall.Add(-2) + + if err := c.Handshake(); err != nil { + return 0, err + } + + c.out.Lock() + defer c.out.Unlock() + + if err := c.out.err; err != nil { + return 0, err + } + + if !c.isHandshakeComplete.Load() { + return 0, alertInternalError + } + + if c.closeNotifySent { + return 0, errShutdown + } + + // TLS 1.0 is susceptible to a chosen-plaintext + // attack when using block mode ciphers due to predictable IVs. + // This can be prevented by splitting each Application Data + // record into two records, effectively randomizing the IV. + // + // https://www.openssl.org/~bodo/tls-cbc.txt + // https://bugzilla.mozilla.org/show_bug.cgi?id=665814 + // https://www.imperialviolet.org/2012/01/15/beastfollowup.html + + var m int + if len(b) > 1 && c.vers == VersionTLS10 { + if _, ok := c.out.cipher.(cipher.BlockMode); ok { + n, err := c.writeRecordLocked(recordTypeApplicationData, b[:1]) + if err != nil { + return n, c.out.setErrorLocked(err) + } + m, b = 1, b[1:] + } + } + + n, err := c.writeRecordLocked(recordTypeApplicationData, b) + return n + m, c.out.setErrorLocked(err) +} + +// handleRenegotiation processes a HelloRequest handshake message. +func (c *Conn) handleRenegotiation() error { + if c.vers == VersionTLS13 { + return errors.New("tls: internal error: unexpected renegotiation") + } + + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + + helloReq, ok := msg.(*helloRequestMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(helloReq, msg) + } + + if !c.isClient { + return c.sendAlert(alertNoRenegotiation) + } + + switch c.config.Renegotiation { + case RenegotiateNever: + return c.sendAlert(alertNoRenegotiation) + case RenegotiateOnceAsClient: + if c.handshakes > 1 { + return c.sendAlert(alertNoRenegotiation) + } + case RenegotiateFreelyAsClient: + // Ok. + default: + c.sendAlert(alertInternalError) + return errors.New("tls: unknown Renegotiation value") + } + + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + + c.isHandshakeComplete.Store(false) + if c.handshakeErr = c.clientHandshake(context.Background()); c.handshakeErr == nil { + c.handshakes++ + } + return c.handshakeErr +} + +// handlePostHandshakeMessage processes a handshake message arrived after the +// handshake is complete. Up to TLS 1.2, it indicates the start of a renegotiation. +func (c *Conn) handlePostHandshakeMessage() error { + if c.vers != VersionTLS13 { + return c.handleRenegotiation() + } + + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + c.retryCount++ + if c.retryCount > maxUselessRecords { + c.sendAlert(alertUnexpectedMessage) + return c.in.setErrorLocked(errors.New("tls: too many non-advancing records")) + } + + switch msg := msg.(type) { + case *newSessionTicketMsgTLS13: + return c.handleNewSessionTicket(msg) + case *keyUpdateMsg: + return c.handleKeyUpdate(msg) + } + // The QUIC layer is supposed to treat an unexpected post-handshake CertificateRequest + // as a QUIC-level PROTOCOL_VIOLATION error (RFC 9001, Section 4.4). Returning an + // unexpected_message alert here doesn't provide it with enough information to distinguish + // this condition from other unexpected messages. This is probably fine. + c.sendAlert(alertUnexpectedMessage) + return fmt.Errorf("tls: received unexpected handshake message of type %T", msg) +} + +func (c *Conn) handleKeyUpdate(keyUpdate *keyUpdateMsg) error { + if c.quic != nil { + c.sendAlert(alertUnexpectedMessage) + return c.in.setErrorLocked(errors.New("tls: received unexpected key update message")) + } + + cipherSuite := cipherSuiteTLS13ByID(c.cipherSuite) + if cipherSuite == nil { + return c.in.setErrorLocked(c.sendAlert(alertInternalError)) + } + + newSecret := cipherSuite.nextTrafficSecret(c.in.trafficSecret) + c.in.setTrafficSecret(cipherSuite, QUICEncryptionLevelInitial, newSecret) + + if keyUpdate.updateRequested { + c.out.Lock() + defer c.out.Unlock() + + msg := &keyUpdateMsg{} + msgBytes, err := msg.marshal() + if err != nil { + return err + } + _, err = c.writeRecordLocked(recordTypeHandshake, msgBytes) + if err != nil { + // Surface the error at the next write. + c.out.setErrorLocked(err) + return nil + } + + newSecret := cipherSuite.nextTrafficSecret(c.out.trafficSecret) + c.out.setTrafficSecret(cipherSuite, QUICEncryptionLevelInitial, newSecret) + } + + return nil +} + +// Read reads data from the connection. +// +// As Read calls [Conn.Handshake], in order to prevent indefinite blocking a deadline +// must be set for both Read and [Conn.Write] before Read is called when the handshake +// has not yet completed. See [Conn.SetDeadline], [Conn.SetReadDeadline], and +// [Conn.SetWriteDeadline]. +func (c *Conn) Read(b []byte) (int, error) { + if err := c.Handshake(); err != nil { + return 0, err + } + if len(b) == 0 { + // Put this after Handshake, in case people were calling + // Read(nil) for the side effect of the Handshake. + return 0, nil + } + + c.in.Lock() + defer c.in.Unlock() + + for c.input.Len() == 0 { + if err := c.readRecord(); err != nil { + return 0, err + } + for c.hand.Len() > 0 { + if err := c.handlePostHandshakeMessage(); err != nil { + return 0, err + } + } + } + + n, _ := c.input.Read(b) + + // If a close-notify alert is waiting, read it so that we can return (n, + // EOF) instead of (n, nil), to signal to the HTTP response reading + // goroutine that the connection is now closed. This eliminates a race + // where the HTTP response reading goroutine would otherwise not observe + // the EOF until its next read, by which time a client goroutine might + // have already tried to reuse the HTTP connection for a new request. + // See https://golang.org/cl/76400046 and https://golang.org/issue/3514 + if n != 0 && c.input.Len() == 0 && c.rawInput.Len() > 0 && + recordType(c.rawInput.Bytes()[0]) == recordTypeAlert { + if err := c.readRecord(); err != nil { + return n, err // will be io.EOF on closeNotify + } + } + + return n, nil +} + +// Close closes the connection. +func (c *Conn) Close() error { + // Interlock with Conn.Write above. + var x int32 + for { + x = c.activeCall.Load() + if x&1 != 0 { + return net.ErrClosed + } + if c.activeCall.CompareAndSwap(x, x|1) { + break + } + } + if x != 0 { + // io.Writer and io.Closer should not be used concurrently. + // If Close is called while a Write is currently in-flight, + // interpret that as a sign that this Close is really just + // being used to break the Write and/or clean up resources and + // avoid sending the alertCloseNotify, which may block + // waiting on handshakeMutex or the c.out mutex. + return c.conn.Close() + } + + var alertErr error + if c.isHandshakeComplete.Load() { + if err := c.closeNotify(); err != nil { + alertErr = fmt.Errorf("tls: failed to send closeNotify alert (but connection was closed anyway): %w", err) + } + } + + if err := c.conn.Close(); err != nil { + return err + } + return alertErr +} + +var errEarlyCloseWrite = errors.New("tls: CloseWrite called before handshake complete") + +// CloseWrite shuts down the writing side of the connection. It should only be +// called once the handshake has completed and does not call CloseWrite on the +// underlying connection. Most callers should just use [Conn.Close]. +func (c *Conn) CloseWrite() error { + if !c.isHandshakeComplete.Load() { + return errEarlyCloseWrite + } + + return c.closeNotify() +} + +func (c *Conn) closeNotify() error { + c.out.Lock() + defer c.out.Unlock() + + if !c.closeNotifySent { + // Set a Write Deadline to prevent possibly blocking forever. + c.SetWriteDeadline(time.Now().Add(time.Second * 5)) + c.closeNotifyErr = c.sendAlertLocked(alertCloseNotify) + c.closeNotifySent = true + // Any subsequent writes will fail. + c.SetWriteDeadline(time.Now()) + } + return c.closeNotifyErr +} + +// Handshake runs the client or server handshake +// protocol if it has not yet been run. +// +// Most uses of this package need not call Handshake explicitly: the +// first [Conn.Read] or [Conn.Write] will call it automatically. +// +// For control over canceling or setting a timeout on a handshake, use +// [Conn.HandshakeContext] or the [Dialer]'s DialContext method instead. +// +// In order to avoid denial of service attacks, the maximum RSA key size allowed +// in certificates sent by either the TLS server or client is limited to 8192 +// bits. This limit can be overridden by setting tlsmaxrsasize in the GODEBUG +// environment variable (e.g. GODEBUG=tlsmaxrsasize=4096). +func (c *Conn) Handshake() error { + return c.HandshakeContext(context.Background()) +} + +// HandshakeContext runs the client or server handshake +// protocol if it has not yet been run. +// +// The provided Context must be non-nil. If the context is canceled before +// the handshake is complete, the handshake is interrupted and an error is returned. +// Once the handshake has completed, cancellation of the context will not affect the +// connection. +// +// Most uses of this package need not call HandshakeContext explicitly: the +// first [Conn.Read] or [Conn.Write] will call it automatically. +func (c *Conn) HandshakeContext(ctx context.Context) error { + // Delegate to unexported method for named return + // without confusing documented signature. + return c.handshakeContext(ctx) +} + +func (c *Conn) handshakeContext(ctx context.Context) (ret error) { + // Fast sync/atomic-based exit if there is no handshake in flight and the + // last one succeeded without an error. Avoids the expensive context setup + // and mutex for most Read and Write calls. + if c.isHandshakeComplete.Load() { + return nil + } + + handshakeCtx, cancel := context.WithCancel(ctx) + // Note: defer this before starting the "interrupter" goroutine + // so that we can tell the difference between the input being canceled and + // this cancellation. In the former case, we need to close the connection. + defer cancel() + + if c.quic != nil { + c.quic.cancelc = handshakeCtx.Done() + c.quic.cancel = cancel + } else if ctx.Done() != nil { + // Start the "interrupter" goroutine, if this context might be canceled. + // (The background context cannot). + // + // The interrupter goroutine waits for the input context to be done and + // closes the connection if this happens before the function returns. + done := make(chan struct{}) + interruptRes := make(chan error, 1) + defer func() { + close(done) + if ctxErr := <-interruptRes; ctxErr != nil { + // Return context error to user. + ret = ctxErr + } + }() + go func() { + select { + case <-handshakeCtx.Done(): + // Close the connection, discarding the error + _ = c.conn.Close() + interruptRes <- handshakeCtx.Err() + case <-done: + interruptRes <- nil + } + }() + } + + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + + if err := c.handshakeErr; err != nil { + return err + } + if c.isHandshakeComplete.Load() { + return nil + } + + c.in.Lock() + defer c.in.Unlock() + + c.handshakeErr = c.handshakeFn(handshakeCtx) + if c.handshakeErr == nil { + c.handshakes++ + } else { + // If an error occurred during the handshake try to flush the + // alert that might be left in the buffer. + c.flush() + } + + if c.handshakeErr == nil && !c.isHandshakeComplete.Load() { + c.handshakeErr = errors.New("tls: internal error: handshake should have had a result") + } + if c.handshakeErr != nil && c.isHandshakeComplete.Load() { + panic("tls: internal error: handshake returned an error but is marked successful") + } + + if c.quic != nil { + if c.handshakeErr == nil { + c.quicHandshakeComplete() + // Provide the 1-RTT read secret now that the handshake is complete. + // The QUIC layer MUST NOT decrypt 1-RTT packets prior to completing + // the handshake (RFC 9001, Section 5.7). + c.quicSetReadSecret(QUICEncryptionLevelApplication, c.cipherSuite, c.in.trafficSecret) + } else { + var a alert + c.out.Lock() + if !errors.As(c.out.err, &a) { + a = alertInternalError + } + c.out.Unlock() + // Return an error which wraps both the handshake error and + // any alert error we may have sent, or alertInternalError + // if we didn't send an alert. + // Truncate the text of the alert to 0 characters. + c.handshakeErr = fmt.Errorf("%w%.0w", c.handshakeErr, AlertError(a)) + } + close(c.quic.blockedc) + close(c.quic.signalc) + } + + return c.handshakeErr +} + +// ConnectionState returns basic TLS details about the connection. +func (c *Conn) ConnectionState() ConnectionState { + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + return c.connectionStateLocked() +} + +// var tlsunsafeekm = godebug.New("tlsunsafeekm") // [uTLS] unsupportted + +func (c *Conn) connectionStateLocked() ConnectionState { + var state ConnectionState + state.HandshakeComplete = c.isHandshakeComplete.Load() + state.Version = c.vers + state.NegotiatedProtocol = c.clientProtocol + state.DidResume = c.didResume + state.testingOnlyDidHRR = c.didHRR + // c.curveID is not set on TLS 1.0–1.2 resumptions. Fix that before exposing it. + state.testingOnlyCurveID = c.curveID + state.NegotiatedProtocolIsMutual = true + state.ServerName = c.serverName + state.CipherSuite = c.cipherSuite + state.PeerCertificates = c.peerCertificates + state.VerifiedChains = c.verifiedChains + state.SignedCertificateTimestamps = c.scts + state.OCSPResponse = c.ocspResponse + if (!c.didResume || c.extMasterSecret) && c.vers != VersionTLS13 { + if c.clientFinishedIsFirst { + state.TLSUnique = c.clientFinished[:] + } else { + state.TLSUnique = c.serverFinished[:] + } + } + if c.config.Renegotiation != RenegotiateNever { + state.ekm = noEKMBecauseRenegotiation + } else if c.vers != VersionTLS13 && !c.extMasterSecret { + state.ekm = func(label string, context []byte, length int) ([]byte, error) { + // [uTLS SECTION START] + // Disabling unsupported godebug package + // if tlsunsafeekm.Value() == "1" { + // tlsunsafeekm.IncNonDefault() + // return c.ekm(label, context, length) + // } + // [uTLS SECTION END] + return noEKMBecauseNoEMS(label, context, length) + } + } else { + state.ekm = c.ekm + } + state.ECHAccepted = c.echAccepted + // [UTLS SECTION START] + c.utlsConnectionStateLocked(&state) + // [UTLS SECTION END] + return state +} + +// OCSPResponse returns the stapled OCSP response from the TLS server, if +// any. (Only valid for client connections.) +func (c *Conn) OCSPResponse() []byte { + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + + return c.ocspResponse +} + +// VerifyHostname checks that the peer certificate chain is valid for +// connecting to host. If so, it returns nil; if not, it returns an error +// describing the problem. +func (c *Conn) VerifyHostname(host string) error { + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + if !c.isClient { + return errors.New("tls: VerifyHostname called on TLS server connection") + } + if !c.isHandshakeComplete.Load() { + return errors.New("tls: handshake has not yet been performed") + } + if len(c.verifiedChains) == 0 { + return errors.New("tls: handshake did not verify certificate chain") + } + return c.peerCertificates[0].VerifyHostname(host) +} diff --git a/backend/vendor/github.com/enetx/utls/defaults.go b/backend/vendor/github.com/enetx/utls/defaults.go new file mode 100644 index 0000000..f36b6c4 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/defaults.go @@ -0,0 +1,140 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "slices" + _ "unsafe" // for linkname +) + +// Defaults are collected in this file to allow distributions to more easily patch +// them to apply local policies. + +// var tlsmlkem = godebug.New("tlsmlkem") [uTLS] + +// defaultCurvePreferences is the default set of supported key exchanges, as +// well as the preference order. +func defaultCurvePreferences() []CurveID { + // [uTLS section begins] + // if tlsmlkem.Value() == "0" { + // return []CurveID{X25519, CurveP256, CurveP384, CurveP521} + // } + // [uTLS section ends] + + return []CurveID{X25519MLKEM768, X25519, CurveP256, CurveP384, CurveP521} +} + +// defaultSupportedSignatureAlgorithms contains the signature and hash algorithms that +// the code advertises as supported in a TLS 1.2+ ClientHello and in a TLS 1.2+ +// CertificateRequest. The two fields are merged to match with TLS 1.3. +// Note that in TLS 1.2, the ECDSA algorithms are not constrained to P-256, etc. +var defaultSupportedSignatureAlgorithms = []SignatureScheme{ + PSSWithSHA256, + ECDSAWithP256AndSHA256, + Ed25519, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA512, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + PKCS1WithSHA1, + ECDSAWithSHA1, +} + +// [uTLS section begins] +// var tlsrsakex = godebug.New("tlsrsakex") +// var tls3des = godebug.New("tls3des") +// [uTLS section ends] + +func defaultCipherSuites() []uint16 { + suites := slices.Clone(cipherSuitesPreferenceOrder) + return slices.DeleteFunc(suites, func(c uint16) bool { + return disabledCipherSuites[c] || + // [uTLS section begins] + // tlsrsakex.Value() != "1" && rsaKexCiphers[c] || + // tls3des.Value() != "1" && tdesCiphers[c] + rsaKexCiphers[c] || + tdesCiphers[c] + // [uTLS section ends] + }) +} + +// defaultCipherSuitesTLS13 is also the preference order, since there are no +// disabled by default TLS 1.3 cipher suites. The same AES vs ChaCha20 logic as +// cipherSuitesPreferenceOrder applies. +// +// defaultCipherSuitesTLS13 should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/quic-go/quic-go +// - github.com/sagernet/quic-go +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname defaultCipherSuitesTLS13 +var defaultCipherSuitesTLS13 = []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, +} + +// defaultCipherSuitesTLS13NoAES should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/quic-go/quic-go +// - github.com/sagernet/quic-go +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname defaultCipherSuitesTLS13NoAES +var defaultCipherSuitesTLS13NoAES = []uint16{ + TLS_CHACHA20_POLY1305_SHA256, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, +} + +// The FIPS-only policies below match BoringSSL's +// ssl_compliance_policy_fips_202205, which is based on NIST SP 800-52r2. +// https://cs.opensource.google/boringssl/boringssl/+/master:ssl/ssl_lib.cc;l=3289;drc=ea7a88fa + +var defaultSupportedVersionsFIPS = []uint16{ + VersionTLS12, + VersionTLS13, +} + +// defaultCurvePreferencesFIPS are the FIPS-allowed curves, +// in preference order (most preferable first). +var defaultCurvePreferencesFIPS = []CurveID{CurveP256, CurveP384} + +// defaultSupportedSignatureAlgorithmsFIPS currently are a subset of +// defaultSupportedSignatureAlgorithms without Ed25519 and SHA-1. +var defaultSupportedSignatureAlgorithmsFIPS = []SignatureScheme{ + PSSWithSHA256, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + ECDSAWithP256AndSHA256, + PKCS1WithSHA384, + ECDSAWithP384AndSHA384, + PKCS1WithSHA512, +} + +// defaultCipherSuitesFIPS are the FIPS-allowed cipher suites. +var defaultCipherSuitesFIPS = []uint16{ + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, +} + +// defaultCipherSuitesTLS13FIPS are the FIPS-allowed cipher suites for TLS 1.3. +var defaultCipherSuitesTLS13FIPS = []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/LICENSE b/backend/vendor/github.com/enetx/utls/dicttls/LICENSE new file mode 100644 index 0000000..6b3bea4 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/LICENSE @@ -0,0 +1,28 @@ +BSD 3-Clause License + +Copyright (c) 2023, Gaukas Wang + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + +1. Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. + +2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + +3. Neither the name of the copyright holder nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE +FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, +OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/backend/vendor/github.com/enetx/utls/dicttls/README.md b/backend/vendor/github.com/enetx/utls/dicttls/README.md new file mode 100644 index 0000000..7a26134 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/README.md @@ -0,0 +1,12 @@ +# Dict TLS + +This is a vendored version of [godicttls](https://github.com/gaukas/godicttls) + +Below is a copy of the original README.md + +# godicttls +Dictionary for TLS written in Go providing bidirectional mapping values to their names, plus enum convenience for values. + +Last Update with data fetched from [IANA](www.iana.org) in March 2023: +- Transport Layer Security (TLS) Parameters [link](https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml) +- Transport Layer Security (TLS) Extensions [link](https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml) \ No newline at end of file diff --git a/backend/vendor/github.com/enetx/utls/dicttls/alerts.go b/backend/vendor/github.com/enetx/utls/dicttls/alerts.go new file mode 100644 index 0000000..ec1f4e7 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/alerts.go @@ -0,0 +1,118 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-6 +// last updated: March 2023 + +const ( + Alert_close_notify uint8 = 0 + Alert_unexpected_message uint8 = 10 + Alert_bad_record_mac uint8 = 20 + Alert_decryption_failed uint8 = 21 + Alert_record_overflow uint8 = 22 + Alert_decompression_failure uint8 = 30 + Alert_handshake_failure uint8 = 40 + Alert_no_certificate uint8 = 41 + Alert_bad_certificate uint8 = 42 + Alert_unsupported_certificate uint8 = 43 + Alert_certificate_revoked uint8 = 44 + Alert_certificate_expired uint8 = 45 + Alert_certificate_unknown uint8 = 46 + Alert_illegal_parameter uint8 = 47 + Alert_unknown_ca uint8 = 48 + Alert_access_denied uint8 = 49 + Alert_decode_error uint8 = 50 + Alert_decrypt_error uint8 = 51 + Alert_too_many_cids_requested uint8 = 52 + Alert_export_restriction uint8 = 60 + Alert_protocol_version uint8 = 70 + Alert_insufficient_security uint8 = 71 + Alert_internal_error uint8 = 80 + Alert_inappropriate_fallback uint8 = 86 + Alert_user_canceled uint8 = 90 + Alert_no_renegotiation uint8 = 100 + Alert_missing_extension uint8 = 109 + Alert_unsupported_extension uint8 = 110 + Alert_certificate_unobtainable uint8 = 111 + Alert_unrecognized_name uint8 = 112 + Alert_bad_certificate_status_response uint8 = 113 + Alert_bad_certificate_hash_value uint8 = 114 + Alert_unknown_psk_identity uint8 = 115 + Alert_certificate_required uint8 = 116 + Alert_no_application_protocol uint8 = 120 +) + +var DictAlertValueIndexed = map[uint8]string{ + 0: "close_notify", + 10: "unexpected_message", + 20: "bad_record_mac", + 21: "decryption_failed", + 22: "record_overflow", + 30: "decompression_failure", + 40: "handshake_failure", + 41: "no_certificate", + 42: "bad_certificate", + 43: "unsupported_certificate", + 44: "certificate_revoked", + 45: "certificate_expired", + 46: "certificate_unknown", + 47: "illegal_parameter", + 48: "unknown_ca", + 49: "access_denied", + 50: "decode_error", + 51: "decrypt_error", + 52: "too_many_cids_requested", + 60: "export_restriction", + 70: "protocol_version", + 71: "insufficient_security", + 80: "internal_error", + 86: "inappropriate_fallback", + 90: "user_canceled", + 100: "no_renegotiation", + 109: "missing_extension", + 110: "unsupported_extension", + 111: "certificate_unobtainable", + 112: "unrecognized_name", + 113: "bad_certificate_status_response", + 114: "bad_certificate_hash_value", + 115: "unknown_psk_identity", + 116: "certificate_required", + 120: "no_application_protocol", +} + +var DictAlertNameIndexed = map[string]uint8{ + "close_notify": 0, + "unexpected_message": 10, + "bad_record_mac": 20, + "decryption_failed": 21, + "record_overflow": 22, + "decompression_failure": 30, + "handshake_failure": 40, + "no_certificate": 41, + "bad_certificate": 42, + "unsupported_certificate": 43, + "certificate_revoked": 44, + "certificate_expired": 45, + "certificate_unknown": 46, + "illegal_parameter": 47, + "unknown_ca": 48, + "access_denied": 49, + "decode_error": 50, + "decrypt_error": 51, + "too_many_cids_requested": 52, + "export_restriction": 60, + "protocol_version": 70, + "insufficient_security": 71, + "internal_error": 80, + "inappropriate_fallback": 86, + "user_canceled": 90, + "no_renegotiation": 100, + "missing_extension": 109, + "unsupported_extension": 110, + "certificate_unobtainable": 111, + "unrecognized_name": 112, + "bad_certificate_status_response": 113, + "bad_certificate_hash_value": 114, + "unknown_psk_identity": 115, + "certificate_required": 116, + "no_application_protocol": 120, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/authorization_data_formats.go b/backend/vendor/github.com/enetx/utls/dicttls/authorization_data_formats.go new file mode 100644 index 0000000..5a1847e --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/authorization_data_formats.go @@ -0,0 +1,35 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#authorization-data +// last updated: March 2023 + +const ( + AuthData_x509_attr_cert uint16 = 0 + AuthData_saml_assertion uint16 = 1 + AuthData_x509_attr_cert_url uint16 = 2 + AuthData_saml_assertion_url uint16 = 3 + AuthData_keynote_assertion_list uint16 = 64 + AuthData_keynote_assertion_list_url uint16 = 65 + AuthData_dtcp_authorization uint16 = 66 +) + +var DictAuthorizationDataFormatValueIndexed = map[uint16]string{ + 0: "x509_attr_cert", + 1: "saml_assertion", + 2: "x509_attr_cert_url", + 3: "saml_assertion_url", + 64: "keynote_assertion_list", + 65: "keynote_assertion_list_url", + 66: "dtcp_authorization", +} + +var DictAuthorizationDataFormatNameIndexed = map[string]uint16{ + "x509_attr_cert": 0, + "saml_assertion": 1, + "x509_attr_cert_url": 2, + "saml_assertion_url": 3, + "Unassigned": 0, + "keynote_assertion_list": 64, + "keynote_assertion_list_url": 65, + "dtcp_authorization": 66, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/cachedinformationtype_values.go b/backend/vendor/github.com/enetx/utls/dicttls/cachedinformationtype_values.go new file mode 100644 index 0000000..8e1469b --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/cachedinformationtype_values.go @@ -0,0 +1,19 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#cachedinformationtype +// last updated: March 2023 + +const ( + CachedInformationType_cert uint8 = 1 + CachedInformationType_cert_req uint8 = 2 +) + +var DictCachedInformationTypeValueIndexed = map[uint8]string{ + 1: "cert", + 2: "cert_req", +} + +var DictCachedInformationTypeNameIndexed = map[string]uint8{ + "cert": 1, + "cert_req": 2, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/certificate_compression_algorithm_ids.go b/backend/vendor/github.com/enetx/utls/dicttls/certificate_compression_algorithm_ids.go new file mode 100644 index 0000000..e5ffca3 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/certificate_compression_algorithm_ids.go @@ -0,0 +1,22 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#tls-certificate-compression-algorithm-ids +// last updated: March 2023 + +const ( + CertCompAlg_zlib uint16 = 1 + CertCompAlg_brotli uint16 = 2 + CertCompAlg_zstd uint16 = 3 +) + +var DictCertificateCompressionAlgorithmValueIndexed = map[uint16]string{ + 1: "zlib", + 2: "brotli", + 3: "zstd", +} + +var DictCertificateCompressionAlgorithmNameIndexed = map[string]uint16{ + "zlib": 1, + "brotli": 2, + "zstd": 3, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/certificate_status_types.go b/backend/vendor/github.com/enetx/utls/dicttls/certificate_status_types.go new file mode 100644 index 0000000..67e0285 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/certificate_status_types.go @@ -0,0 +1,19 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#certificate-status +// last updated: March 2023 + +const ( + CertStatusType_ocsp uint8 = 1 + CertStatusType_ocsp_multi uint8 = 2 +) + +var DictCertificateStatusTypeValueIndexed = map[uint8]string{ + 1: "ocsp", + 2: "ocsp_multi", +} + +var DictCertificateStatusTypeNameIndexed = map[string]uint8{ + "ocsp": 1, + "ocsp_multi": 2, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/certificte_types.go b/backend/vendor/github.com/enetx/utls/dicttls/certificte_types.go new file mode 100644 index 0000000..93a3285 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/certificte_types.go @@ -0,0 +1,25 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#tls-extensiontype-values-3 +// last updated: March 2023 + +const ( + CertType_X509 uint8 = 0 + CertType_OpenPGP uint8 = 1 + CertType_Raw_Public_Key uint8 = 2 + CertType_1609Dot2 uint8 = 3 +) + +var DictCertificateTypeValueIndexed = map[uint8]string{ + 0: "X509", + 1: "OpenPGP", + 2: "Raw Public Key", + 3: "1609Dot2", +} + +var DictCertificateTypeNameIndexed = map[string]uint8{ + "X509": 0, + "OpenPGP": 1, + "Raw Public Key": 2, + "1609Dot2": 3, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/cipher_suites.go b/backend/vendor/github.com/enetx/utls/dicttls/cipher_suites.go new file mode 100644 index 0000000..d787521 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/cipher_suites.go @@ -0,0 +1,1084 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-4 +// last updated: March 2023 + +const ( + TLS_NULL_WITH_NULL_NULL uint16 = 0x0000 + TLS_RSA_WITH_NULL_MD5 uint16 = 0x0001 + TLS_RSA_WITH_NULL_SHA uint16 = 0x0002 + TLS_RSA_EXPORT_WITH_RC4_40_MD5 uint16 = 0x0003 + TLS_RSA_WITH_RC4_128_MD5 uint16 = 0x0004 + TLS_RSA_WITH_RC4_128_SHA uint16 = 0x0005 + TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5 uint16 = 0x0006 + TLS_RSA_WITH_IDEA_CBC_SHA uint16 = 0x0007 + TLS_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0008 + TLS_RSA_WITH_DES_CBC_SHA uint16 = 0x0009 + TLS_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x000A + TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x000B + TLS_DH_DSS_WITH_DES_CBC_SHA uint16 = 0x000C + TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0x000D + TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x000E + TLS_DH_RSA_WITH_DES_CBC_SHA uint16 = 0x000F + TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x0010 + TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0011 + TLS_DHE_DSS_WITH_DES_CBC_SHA uint16 = 0x0012 + TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0x0013 + TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0014 + TLS_DHE_RSA_WITH_DES_CBC_SHA uint16 = 0x0015 + TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x0016 + TLS_DH_anon_EXPORT_WITH_RC4_40_MD5 uint16 = 0x0017 + TLS_DH_anon_WITH_RC4_128_MD5 uint16 = 0x0018 + TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0019 + TLS_DH_anon_WITH_DES_CBC_SHA uint16 = 0x001A + TLS_DH_anon_WITH_3DES_EDE_CBC_SHA uint16 = 0x001B + + TLS_KRB5_WITH_DES_CBC_SHA uint16 = 0x001E + TLS_KRB5_WITH_3DES_EDE_CBC_SHA uint16 = 0x001F + TLS_KRB5_WITH_RC4_128_SHA uint16 = 0x0020 + TLS_KRB5_WITH_IDEA_CBC_SHA uint16 = 0x0021 + TLS_KRB5_WITH_DES_CBC_MD5 uint16 = 0x0022 + TLS_KRB5_WITH_3DES_EDE_CBC_MD5 uint16 = 0x0023 + TLS_KRB5_WITH_RC4_128_MD5 uint16 = 0x0024 + TLS_KRB5_WITH_IDEA_CBC_MD5 uint16 = 0x0025 + TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA uint16 = 0x0026 + TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA uint16 = 0x0027 + TLS_KRB5_EXPORT_WITH_RC4_40_SHA uint16 = 0x0028 + TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5 uint16 = 0x0029 + TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5 uint16 = 0x002A + TLS_KRB5_EXPORT_WITH_RC4_40_MD5 uint16 = 0x002B + TLS_PSK_WITH_NULL_SHA uint16 = 0x002C + TLS_DHE_PSK_WITH_NULL_SHA uint16 = 0x002D + TLS_RSA_PSK_WITH_NULL_SHA uint16 = 0x002E + TLS_RSA_WITH_AES_128_CBC_SHA uint16 = 0x002F + TLS_DH_DSS_WITH_AES_128_CBC_SHA uint16 = 0x0030 + TLS_DH_RSA_WITH_AES_128_CBC_SHA uint16 = 0x0031 + TLS_DHE_DSS_WITH_AES_128_CBC_SHA uint16 = 0x0032 + TLS_DHE_RSA_WITH_AES_128_CBC_SHA uint16 = 0x0033 + TLS_DH_anon_WITH_AES_128_CBC_SHA uint16 = 0x0034 + TLS_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0035 + TLS_DH_DSS_WITH_AES_256_CBC_SHA uint16 = 0x0036 + TLS_DH_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0037 + TLS_DHE_DSS_WITH_AES_256_CBC_SHA uint16 = 0x0038 + TLS_DHE_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0039 + TLS_DH_anon_WITH_AES_256_CBC_SHA uint16 = 0x003A + TLS_RSA_WITH_NULL_SHA256 uint16 = 0x003B + TLS_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x003C + TLS_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x003D + TLS_DH_DSS_WITH_AES_128_CBC_SHA256 uint16 = 0x003E + TLS_DH_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x003F + TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 uint16 = 0x0040 + TLS_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0041 + TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0042 + TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0043 + TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0044 + TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0045 + TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0046 + + TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x0067 + TLS_DH_DSS_WITH_AES_256_CBC_SHA256 uint16 = 0x0068 + TLS_DH_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x0069 + TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 uint16 = 0x006A + TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x006B + TLS_DH_anon_WITH_AES_128_CBC_SHA256 uint16 = 0x006C + TLS_DH_anon_WITH_AES_256_CBC_SHA256 uint16 = 0x006D + + TLS_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0084 + TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0085 + TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0086 + TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0087 + TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0088 + TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0089 + TLS_PSK_WITH_RC4_128_SHA uint16 = 0x008A + TLS_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x008B + TLS_PSK_WITH_AES_128_CBC_SHA uint16 = 0x008C + TLS_PSK_WITH_AES_256_CBC_SHA uint16 = 0x008D + TLS_DHE_PSK_WITH_RC4_128_SHA uint16 = 0x008E + TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x008F + TLS_DHE_PSK_WITH_AES_128_CBC_SHA uint16 = 0x0090 + TLS_DHE_PSK_WITH_AES_256_CBC_SHA uint16 = 0x0091 + TLS_RSA_PSK_WITH_RC4_128_SHA uint16 = 0x0092 + TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x0093 + TLS_RSA_PSK_WITH_AES_128_CBC_SHA uint16 = 0x0094 + TLS_RSA_PSK_WITH_AES_256_CBC_SHA uint16 = 0x0095 + TLS_RSA_WITH_SEED_CBC_SHA uint16 = 0x0096 + TLS_DH_DSS_WITH_SEED_CBC_SHA uint16 = 0x0097 + TLS_DH_RSA_WITH_SEED_CBC_SHA uint16 = 0x0098 + TLS_DHE_DSS_WITH_SEED_CBC_SHA uint16 = 0x0099 + TLS_DHE_RSA_WITH_SEED_CBC_SHA uint16 = 0x009A + TLS_DH_anon_WITH_SEED_CBC_SHA uint16 = 0x009B + TLS_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x009C + TLS_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x009D + TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x009E + TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x009F + TLS_DH_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x00A0 + TLS_DH_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x00A1 + TLS_DHE_DSS_WITH_AES_128_GCM_SHA256 uint16 = 0x00A2 + TLS_DHE_DSS_WITH_AES_256_GCM_SHA384 uint16 = 0x00A3 + TLS_DH_DSS_WITH_AES_128_GCM_SHA256 uint16 = 0x00A4 + TLS_DH_DSS_WITH_AES_256_GCM_SHA384 uint16 = 0x00A5 + TLS_DH_anon_WITH_AES_128_GCM_SHA256 uint16 = 0x00A6 + TLS_DH_anon_WITH_AES_256_GCM_SHA384 uint16 = 0x00A7 + TLS_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00A8 + TLS_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00A9 + TLS_DHE_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00AA + TLS_DHE_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00AB + TLS_RSA_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00AC + TLS_RSA_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00AD + TLS_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00AE + TLS_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00AF + TLS_PSK_WITH_NULL_SHA256 uint16 = 0x00B0 + TLS_PSK_WITH_NULL_SHA384 uint16 = 0x00B1 + TLS_DHE_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00B2 + TLS_DHE_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00B3 + TLS_DHE_PSK_WITH_NULL_SHA256 uint16 = 0x00B4 + TLS_DHE_PSK_WITH_NULL_SHA384 uint16 = 0x00B5 + TLS_RSA_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00B6 + TLS_RSA_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00B7 + TLS_RSA_PSK_WITH_NULL_SHA256 uint16 = 0x00B8 + TLS_RSA_PSK_WITH_NULL_SHA384 uint16 = 0x00B9 + TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BA + TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BB + TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BC + TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BD + TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BE + TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BF + TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C0 + TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C1 + TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C2 + TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C3 + TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C4 + TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C5 + TLS_SM4_GCM_SM3 uint16 = 0x00C6 + TLS_SM4_CCM_SM3 uint16 = 0x00C7 + + TLS_EMPTY_RENEGOTIATION_INFO_SCSV uint16 = 0x00FF + + TLS_AES_128_GCM_SHA256 uint16 = 0x1301 + TLS_AES_256_GCM_SHA384 uint16 = 0x1302 + TLS_CHACHA20_POLY1305_SHA256 uint16 = 0x1303 + TLS_AES_128_CCM_SHA256 uint16 = 0x1304 + TLS_AES_128_CCM_8_SHA256 uint16 = 0x1305 + TLS_AEGIS_256_SHA384 uint16 = 0x1306 + TLS_AEGIS_128L_SHA256 uint16 = 0x1307 + + TLS_FALLBACK_SCSV uint16 = 0x5600 + + TLS_ECDH_ECDSA_WITH_NULL_SHA uint16 = 0xC001 + TLS_ECDH_ECDSA_WITH_RC4_128_SHA uint16 = 0xC002 + TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC003 + TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA uint16 = 0xC004 + TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA uint16 = 0xC005 + TLS_ECDHE_ECDSA_WITH_NULL_SHA uint16 = 0xC006 + TLS_ECDHE_ECDSA_WITH_RC4_128_SHA uint16 = 0xC007 + TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC008 + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA uint16 = 0xC009 + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA uint16 = 0xC00A + TLS_ECDH_RSA_WITH_NULL_SHA uint16 = 0xC00B + TLS_ECDH_RSA_WITH_RC4_128_SHA uint16 = 0xC00C + TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC00D + TLS_ECDH_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC00E + TLS_ECDH_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC00F + TLS_ECDHE_RSA_WITH_NULL_SHA uint16 = 0xC010 + TLS_ECDHE_RSA_WITH_RC4_128_SHA uint16 = 0xC011 + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC012 + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC013 + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC014 + TLS_ECDH_anon_WITH_NULL_SHA uint16 = 0xC015 + TLS_ECDH_anon_WITH_RC4_128_SHA uint16 = 0xC016 + TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA uint16 = 0xC017 + TLS_ECDH_anon_WITH_AES_128_CBC_SHA uint16 = 0xC018 + TLS_ECDH_anon_WITH_AES_256_CBC_SHA uint16 = 0xC019 + TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01A + TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01B + TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01C + TLS_SRP_SHA_WITH_AES_128_CBC_SHA uint16 = 0xC01D + TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC01E + TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA uint16 = 0xC01F + TLS_SRP_SHA_WITH_AES_256_CBC_SHA uint16 = 0xC020 + TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC021 + TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA uint16 = 0xC022 + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC023 + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC024 + TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC025 + TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC026 + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC027 + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC028 + TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC029 + TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC02A + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02B + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC02C + TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02D + TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC02E + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02F + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC030 + TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC031 + TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC032 + TLS_ECDHE_PSK_WITH_RC4_128_SHA uint16 = 0xC033 + TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0xC034 + TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA uint16 = 0xC035 + TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA uint16 = 0xC036 + TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0xC037 + TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0xC038 + TLS_ECDHE_PSK_WITH_NULL_SHA uint16 = 0xC039 + TLS_ECDHE_PSK_WITH_NULL_SHA256 uint16 = 0xC03A + TLS_ECDHE_PSK_WITH_NULL_SHA384 uint16 = 0xC03B + TLS_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC03C + TLS_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC03D + TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC03E + TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC03F + TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC040 + TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC041 + TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC042 + TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC043 + TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC044 + TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC045 + TLS_DH_anon_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC046 + TLS_DH_anon_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC047 + TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC048 + TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC049 + TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04A + TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04B + TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04C + TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04D + TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04E + TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04F + TLS_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC050 + TLS_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC051 + TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC052 + TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC053 + TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC054 + TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC055 + TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC056 + TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC057 + TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC058 + TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC059 + TLS_DH_anon_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05A + TLS_DH_anon_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05B + TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05C + TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05D + TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05E + TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05F + TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC060 + TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC061 + TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC062 + TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC063 + TLS_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC064 + TLS_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC065 + TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC066 + TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC067 + TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC068 + TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC069 + TLS_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06A + TLS_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06B + TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06C + TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06D + TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06E + TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06F + TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC070 + TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC071 + TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC072 + TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC073 + TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC074 + TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC075 + TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC076 + TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC077 + TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC078 + TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC079 + TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07A + TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07B + TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07C + TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07D + TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07E + TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07F + TLS_DHE_DSS_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC080 + TLS_DHE_DSS_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC081 + TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC082 + TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC083 + TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC084 + TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC085 + TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC086 + TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC087 + TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC088 + TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC089 + TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08A + TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08B + TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08C + TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08D + TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08E + TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08F + TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC090 + TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC091 + TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC092 + TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC093 + TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC094 + TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC095 + TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC096 + TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC097 + TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC098 + TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC099 + TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC09A + TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC09B + TLS_RSA_WITH_AES_128_CCM uint16 = 0xC09C + TLS_RSA_WITH_AES_256_CCM uint16 = 0xC09D + TLS_DHE_RSA_WITH_AES_128_CCM uint16 = 0xC09E + TLS_DHE_RSA_WITH_AES_256_CCM uint16 = 0xC09F + TLS_RSA_WITH_AES_128_CCM_8 uint16 = 0xC0A0 + TLS_RSA_WITH_AES_256_CCM_8 uint16 = 0xC0A1 + TLS_DHE_RSA_WITH_AES_128_CCM_8 uint16 = 0xC0A2 + TLS_DHE_RSA_WITH_AES_256_CCM_8 uint16 = 0xC0A3 + TLS_PSK_WITH_AES_128_CCM uint16 = 0xC0A4 + TLS_PSK_WITH_AES_256_CCM uint16 = 0xC0A5 + TLS_DHE_PSK_WITH_AES_128_CCM uint16 = 0xC0A6 + TLS_DHE_PSK_WITH_AES_256_CCM uint16 = 0xC0A7 + TLS_PSK_WITH_AES_128_CCM_8 uint16 = 0xC0A8 + TLS_PSK_WITH_AES_256_CCM_8 uint16 = 0xC0A9 + TLS_PSK_DHE_WITH_AES_128_CCM_8 uint16 = 0xC0AA + TLS_PSK_DHE_WITH_AES_256_CCM_8 uint16 = 0xC0AB + TLS_ECDHE_ECDSA_WITH_AES_128_CCM uint16 = 0xC0AC + TLS_ECDHE_ECDSA_WITH_AES_256_CCM uint16 = 0xC0AD + TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8 uint16 = 0xC0AE + TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8 uint16 = 0xC0AF + TLS_ECCPWD_WITH_AES_128_GCM_SHA256 uint16 = 0xC0B0 + TLS_ECCPWD_WITH_AES_256_GCM_SHA384 uint16 = 0xC0B1 + TLS_ECCPWD_WITH_AES_128_CCM_SHA256 uint16 = 0xC0B2 + TLS_ECCPWD_WITH_AES_256_CCM_SHA384 uint16 = 0xC0B3 + TLS_SHA256_SHA256 uint16 = 0xC0B4 + TLS_SHA384_SHA384 uint16 = 0xC0B5 + + TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC uint16 = 0xC100 + TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC uint16 = 0xC101 + TLS_GOSTR341112_256_WITH_28147_CNT_IMIT uint16 = 0xC102 + TLS_GOSTR341112_256_WITH_KUZNYECHIK_MGM_L uint16 = 0xC103 +) + +var DictCipherSuiteValueIndexed = map[uint16]string{ + 0x0000: "TLS_NULL_WITH_NULL_NULL", + 0x0001: "TLS_RSA_WITH_NULL_MD5", + 0x0002: "TLS_RSA_WITH_NULL_SHA", + 0x0003: "TLS_RSA_EXPORT_WITH_RC4_40_MD5", + 0x0004: "TLS_RSA_WITH_RC4_128_MD5", + 0x0005: "TLS_RSA_WITH_RC4_128_SHA", + 0x0006: "TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5", + 0x0007: "TLS_RSA_WITH_IDEA_CBC_SHA", + 0x0008: "TLS_RSA_EXPORT_WITH_DES40_CBC_SHA", + 0x0009: "TLS_RSA_WITH_DES_CBC_SHA", + 0x000A: "TLS_RSA_WITH_3DES_EDE_CBC_SHA", + 0x000B: "TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA", + 0x000C: "TLS_DH_DSS_WITH_DES_CBC_SHA", + 0x000D: "TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA", + 0x000E: "TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA", + 0x000F: "TLS_DH_RSA_WITH_DES_CBC_SHA", + 0x0010: "TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA", + 0x0011: "TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA", + 0x0012: "TLS_DHE_DSS_WITH_DES_CBC_SHA", + 0x0013: "TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA", + 0x0014: "TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA", + 0x0015: "TLS_DHE_RSA_WITH_DES_CBC_SHA", + 0x0016: "TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA", + 0x0017: "TLS_DH_anon_EXPORT_WITH_RC4_40_MD5", + 0x0018: "TLS_DH_anon_WITH_RC4_128_MD5", + 0x0019: "TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA", + 0x001A: "TLS_DH_anon_WITH_DES_CBC_SHA", + 0x001B: "TLS_DH_anon_WITH_3DES_EDE_CBC_SHA", + + 0x001E: "TLS_KRB5_WITH_DES_CBC_SHA", + 0x001F: "TLS_KRB5_WITH_3DES_EDE_CBC_SHA", + 0x0020: "TLS_KRB5_WITH_RC4_128_SHA", + 0x0021: "TLS_KRB5_WITH_IDEA_CBC_SHA", + 0x0022: "TLS_KRB5_WITH_DES_CBC_MD5", + 0x0023: "TLS_KRB5_WITH_3DES_EDE_CBC_MD5", + 0x0024: "TLS_KRB5_WITH_RC4_128_MD5", + 0x0025: "TLS_KRB5_WITH_IDEA_CBC_MD5", + 0x0026: "TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA", + 0x0027: "TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA", + 0x0028: "TLS_KRB5_EXPORT_WITH_RC4_40_SHA", + 0x0029: "TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5", + 0x002A: "TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5", + 0x002B: "TLS_KRB5_EXPORT_WITH_RC4_40_MD5", + 0x002C: "TLS_PSK_WITH_NULL_SHA", + 0x002D: "TLS_DHE_PSK_WITH_NULL_SHA", + 0x002E: "TLS_RSA_PSK_WITH_NULL_SHA", + 0x002F: "TLS_RSA_WITH_AES_128_CBC_SHA", + 0x0030: "TLS_DH_DSS_WITH_AES_128_CBC_SHA", + 0x0031: "TLS_DH_RSA_WITH_AES_128_CBC_SHA", + 0x0032: "TLS_DHE_DSS_WITH_AES_128_CBC_SHA", + 0x0033: "TLS_DHE_RSA_WITH_AES_128_CBC_SHA", + 0x0034: "TLS_DH_anon_WITH_AES_128_CBC_SHA", + 0x0035: "TLS_RSA_WITH_AES_256_CBC_SHA", + 0x0036: "TLS_DH_DSS_WITH_AES_256_CBC_SHA", + 0x0037: "TLS_DH_RSA_WITH_AES_256_CBC_SHA", + 0x0038: "TLS_DHE_DSS_WITH_AES_256_CBC_SHA", + 0x0039: "TLS_DHE_RSA_WITH_AES_256_CBC_SHA", + 0x003A: "TLS_DH_anon_WITH_AES_256_CBC_SHA", + 0x003B: "TLS_RSA_WITH_NULL_SHA256", + 0x003C: "TLS_RSA_WITH_AES_128_CBC_SHA256", + 0x003D: "TLS_RSA_WITH_AES_256_CBC_SHA256", + 0x003E: "TLS_DH_DSS_WITH_AES_128_CBC_SHA256", + 0x003F: "TLS_DH_RSA_WITH_AES_128_CBC_SHA256", + 0x0040: "TLS_DHE_DSS_WITH_AES_128_CBC_SHA256", + 0x0041: "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA", + 0x0042: "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA", + 0x0043: "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA", + 0x0044: "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA", + 0x0045: "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA", + 0x0046: "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA", + + 0x0067: "TLS_DHE_RSA_WITH_AES_128_CBC_SHA256", + 0x0068: "TLS_DH_DSS_WITH_AES_256_CBC_SHA256", + 0x0069: "TLS_DH_RSA_WITH_AES_256_CBC_SHA256", + 0x006A: "TLS_DHE_DSS_WITH_AES_256_CBC_SHA256", + 0x006B: "TLS_DHE_RSA_WITH_AES_256_CBC_SHA256", + 0x006C: "TLS_DH_anon_WITH_AES_128_CBC_SHA256", + 0x006D: "TLS_DH_anon_WITH_AES_256_CBC_SHA256", + + 0x0084: "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA", + 0x0085: "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA", + 0x0086: "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA", + 0x0087: "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA", + 0x0088: "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA", + 0x0089: "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA", + 0x008A: "TLS_PSK_WITH_RC4_128_SHA", + 0x008B: "TLS_PSK_WITH_3DES_EDE_CBC_SHA", + 0x008C: "TLS_PSK_WITH_AES_128_CBC_SHA", + 0x008D: "TLS_PSK_WITH_AES_256_CBC_SHA", + 0x008E: "TLS_DHE_PSK_WITH_RC4_128_SHA", + 0x008F: "TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA", + 0x0090: "TLS_DHE_PSK_WITH_AES_128_CBC_SHA", + 0x0091: "TLS_DHE_PSK_WITH_AES_256_CBC_SHA", + 0x0092: "TLS_RSA_PSK_WITH_RC4_128_SHA", + 0x0093: "TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA", + 0x0094: "TLS_RSA_PSK_WITH_AES_128_CBC_SHA", + 0x0095: "TLS_RSA_PSK_WITH_AES_256_CBC_SHA", + 0x0096: "TLS_RSA_WITH_SEED_CBC_SHA", + 0x0097: "TLS_DH_DSS_WITH_SEED_CBC_SHA", + 0x0098: "TLS_DH_RSA_WITH_SEED_CBC_SHA", + 0x0099: "TLS_DHE_DSS_WITH_SEED_CBC_SHA", + 0x009A: "TLS_DHE_RSA_WITH_SEED_CBC_SHA", + 0x009B: "TLS_DH_anon_WITH_SEED_CBC_SHA", + 0x009C: "TLS_RSA_WITH_AES_128_GCM_SHA256", + 0x009D: "TLS_RSA_WITH_AES_256_GCM_SHA384", + 0x009E: "TLS_DHE_RSA_WITH_AES_128_GCM_SHA256", + 0x009F: "TLS_DHE_RSA_WITH_AES_256_GCM_SHA384", + 0x00A0: "TLS_DH_RSA_WITH_AES_128_GCM_SHA256", + 0x00A1: "TLS_DH_RSA_WITH_AES_256_GCM_SHA384", + 0x00A2: "TLS_DHE_DSS_WITH_AES_128_GCM_SHA256", + 0x00A3: "TLS_DHE_DSS_WITH_AES_256_GCM_SHA384", + 0x00A4: "TLS_DH_DSS_WITH_AES_128_GCM_SHA256", + 0x00A5: "TLS_DH_DSS_WITH_AES_256_GCM_SHA384", + 0x00A6: "TLS_DH_anon_WITH_AES_128_GCM_SHA256", + 0x00A7: "TLS_DH_anon_WITH_AES_256_GCM_SHA384", + 0x00A8: "TLS_PSK_WITH_AES_128_GCM_SHA256", + 0x00A9: "TLS_PSK_WITH_AES_256_GCM_SHA384", + 0x00AA: "TLS_DHE_PSK_WITH_AES_128_GCM_SHA256", + 0x00AB: "TLS_DHE_PSK_WITH_AES_256_GCM_SHA384", + 0x00AC: "TLS_RSA_PSK_WITH_AES_128_GCM_SHA256", + 0x00AD: "TLS_RSA_PSK_WITH_AES_256_GCM_SHA384", + 0x00AE: "TLS_PSK_WITH_AES_128_CBC_SHA256", + 0x00AF: "TLS_PSK_WITH_AES_256_CBC_SHA384", + 0x00B0: "TLS_PSK_WITH_NULL_SHA256", + 0x00B1: "TLS_PSK_WITH_NULL_SHA384", + 0x00B2: "TLS_DHE_PSK_WITH_AES_128_CBC_SHA256", + 0x00B3: "TLS_DHE_PSK_WITH_AES_256_CBC_SHA384", + 0x00B4: "TLS_DHE_PSK_WITH_NULL_SHA256", + 0x00B5: "TLS_DHE_PSK_WITH_NULL_SHA384", + 0x00B6: "TLS_RSA_PSK_WITH_AES_128_CBC_SHA256", + 0x00B7: "TLS_RSA_PSK_WITH_AES_256_CBC_SHA384", + 0x00B8: "TLS_RSA_PSK_WITH_NULL_SHA256", + 0x00B9: "TLS_RSA_PSK_WITH_NULL_SHA384", + 0x00BA: "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256", + 0x00BB: "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256", + 0x00BC: "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256", + 0x00BD: "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256", + 0x00BE: "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256", + 0x00BF: "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256", + 0x00C0: "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C1: "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C2: "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C3: "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C4: "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C5: "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C6: "TLS_SM4_GCM_SM3", + 0x00C7: "TLS_SM4_CCM_SM3", + + 0x00FF: "TLS_EMPTY_RENEGOTIATION_INFO_SCSV", + + 0x1301: "TLS_AES_128_GCM_SHA256", + 0x1302: "TLS_AES_256_GCM_SHA384", + 0x1303: "TLS_CHACHA20_POLY1305_SHA256", + 0x1304: "TLS_AES_128_CCM_SHA256", + 0x1305: "TLS_AES_128_CCM_8_SHA256", + 0x1306: "TLS_AEGIS_256_SHA384", + 0x1307: "TLS_AEGIS_128L_SHA256", + + 0x5600: "TLS_FALLBACK_SCSV", + + 0xC001: "TLS_ECDH_ECDSA_WITH_NULL_SHA", + 0xC002: "TLS_ECDH_ECDSA_WITH_RC4_128_SHA", + 0xC003: "TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA", + 0xC004: "TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA", + 0xC005: "TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA", + 0xC006: "TLS_ECDHE_ECDSA_WITH_NULL_SHA", + 0xC007: "TLS_ECDHE_ECDSA_WITH_RC4_128_SHA", + 0xC008: "TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA", + 0xC009: "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA", + 0xC00A: "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA", + 0xC00B: "TLS_ECDH_RSA_WITH_NULL_SHA", + 0xC00C: "TLS_ECDH_RSA_WITH_RC4_128_SHA", + 0xC00D: "TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA", + 0xC00E: "TLS_ECDH_RSA_WITH_AES_128_CBC_SHA", + 0xC00F: "TLS_ECDH_RSA_WITH_AES_256_CBC_SHA", + 0xC010: "TLS_ECDHE_RSA_WITH_NULL_SHA", + 0xC011: "TLS_ECDHE_RSA_WITH_RC4_128_SHA", + 0xC012: "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA", + 0xC013: "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA", + 0xC014: "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA", + 0xC015: "TLS_ECDH_anon_WITH_NULL_SHA", + 0xC016: "TLS_ECDH_anon_WITH_RC4_128_SHA", + 0xC017: "TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA", + 0xC018: "TLS_ECDH_anon_WITH_AES_128_CBC_SHA", + 0xC019: "TLS_ECDH_anon_WITH_AES_256_CBC_SHA", + 0xC01A: "TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA", + 0xC01B: "TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA", + 0xC01C: "TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA", + 0xC01D: "TLS_SRP_SHA_WITH_AES_128_CBC_SHA", + 0xC01E: "TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA", + 0xC01F: "TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA", + 0xC020: "TLS_SRP_SHA_WITH_AES_256_CBC_SHA", + 0xC021: "TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA", + 0xC022: "TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA", + 0xC023: "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256", + 0xC024: "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384", + 0xC025: "TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256", + 0xC026: "TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384", + 0xC027: "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256", + 0xC028: "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384", + 0xC029: "TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256", + 0xC02A: "TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384", + 0xC02B: "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256", + 0xC02C: "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384", + 0xC02D: "TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256", + 0xC02E: "TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384", + 0xC02F: "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256", + 0xC030: "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384", + 0xC031: "TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256", + 0xC032: "TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384", + 0xC033: "TLS_ECDHE_PSK_WITH_RC4_128_SHA", + 0xC034: "TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA", + 0xC035: "TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA", + 0xC036: "TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA", + 0xC037: "TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256", + 0xC038: "TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384", + 0xC039: "TLS_ECDHE_PSK_WITH_NULL_SHA", + 0xC03A: "TLS_ECDHE_PSK_WITH_NULL_SHA256", + 0xC03B: "TLS_ECDHE_PSK_WITH_NULL_SHA384", + 0xC03C: "TLS_RSA_WITH_ARIA_128_CBC_SHA256", + 0xC03D: "TLS_RSA_WITH_ARIA_256_CBC_SHA384", + 0xC03E: "TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256", + 0xC03F: "TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384", + 0xC040: "TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256", + 0xC041: "TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384", + 0xC042: "TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256", + 0xC043: "TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384", + 0xC044: "TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256", + 0xC045: "TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384", + 0xC046: "TLS_DH_anon_WITH_ARIA_128_CBC_SHA256", + 0xC047: "TLS_DH_anon_WITH_ARIA_256_CBC_SHA384", + 0xC048: "TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256", + 0xC049: "TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384", + 0xC04A: "TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256", + 0xC04B: "TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384", + 0xC04C: "TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256", + 0xC04D: "TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384", + 0xC04E: "TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256", + 0xC04F: "TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384", + 0xC050: "TLS_RSA_WITH_ARIA_128_GCM_SHA256", + 0xC051: "TLS_RSA_WITH_ARIA_256_GCM_SHA384", + 0xC052: "TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256", + 0xC053: "TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384", + 0xC054: "TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256", + 0xC055: "TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384", + 0xC056: "TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256", + 0xC057: "TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384", + 0xC058: "TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256", + 0xC059: "TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384", + 0xC05A: "TLS_DH_anon_WITH_ARIA_128_GCM_SHA256", + 0xC05B: "TLS_DH_anon_WITH_ARIA_256_GCM_SHA384", + 0xC05C: "TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256", + 0xC05D: "TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384", + 0xC05E: "TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256", + 0xC05F: "TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384", + 0xC060: "TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256", + 0xC061: "TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384", + 0xC062: "TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256", + 0xC063: "TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384", + 0xC064: "TLS_PSK_WITH_ARIA_128_CBC_SHA256", + 0xC065: "TLS_PSK_WITH_ARIA_256_CBC_SHA384", + 0xC066: "TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256", + 0xC067: "TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384", + 0xC068: "TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256", + 0xC069: "TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384", + 0xC06A: "TLS_PSK_WITH_ARIA_128_GCM_SHA256", + 0xC06B: "TLS_PSK_WITH_ARIA_256_GCM_SHA384", + 0xC06C: "TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256", + 0xC06D: "TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384", + 0xC06E: "TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256", + 0xC06F: "TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384", + 0xC070: "TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256", + 0xC071: "TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384", + 0xC072: "TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256", + 0xC073: "TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384", + 0xC074: "TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256", + 0xC075: "TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384", + 0xC076: "TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256", + 0xC077: "TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384", + 0xC078: "TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256", + 0xC079: "TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384", + 0xC07A: "TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC07B: "TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC07C: "TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC07D: "TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC07E: "TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC07F: "TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC080: "TLS_DHE_DSS_WITH_CAMELLIA_128_GCM_SHA256", + 0xC081: "TLS_DHE_DSS_WITH_CAMELLIA_256_GCM_SHA384", + 0xC082: "TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256", + 0xC083: "TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384", + 0xC084: "TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256", + 0xC085: "TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384", + 0xC086: "TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC087: "TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC088: "TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC089: "TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC08A: "TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC08B: "TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC08C: "TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC08D: "TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC08E: "TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256", + 0xC08F: "TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384", + 0xC090: "TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256", + 0xC091: "TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384", + 0xC092: "TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256", + 0xC093: "TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384", + 0xC094: "TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256", + 0xC095: "TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384", + 0xC096: "TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256", + 0xC097: "TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384", + 0xC098: "TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256", + 0xC099: "TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384", + 0xC09A: "TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256", + 0xC09B: "TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384", + 0xC09C: "TLS_RSA_WITH_AES_128_CCM", + 0xC09D: "TLS_RSA_WITH_AES_256_CCM", + 0xC09E: "TLS_DHE_RSA_WITH_AES_128_CCM", + 0xC09F: "TLS_DHE_RSA_WITH_AES_256_CCM", + 0xC0A0: "TLS_RSA_WITH_AES_128_CCM_8", + 0xC0A1: "TLS_RSA_WITH_AES_256_CCM_8", + 0xC0A2: "TLS_DHE_RSA_WITH_AES_128_CCM_8", + 0xC0A3: "TLS_DHE_RSA_WITH_AES_256_CCM_8", + 0xC0A4: "TLS_PSK_WITH_AES_128_CCM", + 0xC0A5: "TLS_PSK_WITH_AES_256_CCM", + 0xC0A6: "TLS_DHE_PSK_WITH_AES_128_CCM", + 0xC0A7: "TLS_DHE_PSK_WITH_AES_256_CCM", + 0xC0A8: "TLS_PSK_WITH_AES_128_CCM_8", + 0xC0A9: "TLS_PSK_WITH_AES_256_CCM_8", + 0xC0AA: "TLS_PSK_DHE_WITH_AES_128_CCM_8", + 0xC0AB: "TLS_PSK_DHE_WITH_AES_256_CCM_8", + 0xC0AC: "TLS_ECDHE_ECDSA_WITH_AES_128_CCM", + 0xC0AD: "TLS_ECDHE_ECDSA_WITH_AES_256_CCM", + 0xC0AE: "TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8", + 0xC0AF: "TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8", + 0xC0B0: "TLS_ECCPWD_WITH_AES_128_GCM_SHA256", + 0xC0B1: "TLS_ECCPWD_WITH_AES_256_GCM_SHA384", + 0xC0B2: "TLS_ECCPWD_WITH_AES_128_CCM_SHA256", + 0xC0B3: "TLS_ECCPWD_WITH_AES_256_CCM_SHA384", + 0xC0B4: "TLS_SHA256_SHA256", + 0xC0B5: "TLS_SHA384_SHA384", + + 0xC100: "TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC", + 0xC101: "TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC", + 0xC102: "TLS_GOSTR341112_256_WITH_28147_CNT_IMIT", + 0xC103: "TLS_GOSTR341112_256_WITH_KUZNYECHIK_MGM_L", + 0xC104: "TLS_GOSTR341112_256_WITH_MAGMA_MGM_L", + 0xC105: "TLS_GOSTR341112_256_WITH_KUZNYECHIK_MGM_S", + 0xC106: "TLS_GOSTR341112_256_WITH_MAGMA_MGM_S", + + 0xCCA8: "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256", + 0xCCA9: "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256", + 0xCCAA: "TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256", + 0xCCAB: "TLS_PSK_WITH_CHACHA20_POLY1305_SHA256", + 0xCCAC: "TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256", + 0xCCAD: "TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256", + 0xCCAE: "TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256", + + 0xD001: "TLS_ECDHE_PSK_WITH_AES_128_GCM_SHA256", + 0xD002: "TLS_ECDHE_PSK_WITH_AES_256_GCM_SHA384", + 0xD003: "TLS_ECDHE_PSK_WITH_AES_128_CCM_8_SHA256", + 0xD005: "TLS_ECDHE_PSK_WITH_AES_128_CCM_SHA256", +} + +var DictCipherSuiteNameIndexed = map[string]uint16{ + "TLS_NULL_WITH_NULL_NULL": 0x0000, + "TLS_RSA_WITH_NULL_MD5": 0x0001, + "TLS_RSA_WITH_NULL_SHA": 0x0002, + "TLS_RSA_EXPORT_WITH_RC4_40_MD5": 0x0003, + "TLS_RSA_WITH_RC4_128_MD5": 0x0004, + "TLS_RSA_WITH_RC4_128_SHA": 0x0005, + "TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5": 0x0006, + "TLS_RSA_WITH_IDEA_CBC_SHA": 0x0007, + "TLS_RSA_EXPORT_WITH_DES40_CBC_SHA": 0x0008, + "TLS_RSA_WITH_DES_CBC_SHA": 0x0009, + "TLS_RSA_WITH_3DES_EDE_CBC_SHA": 0x000A, + "TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA": 0x000B, + "TLS_DH_DSS_WITH_DES_CBC_SHA": 0x000C, + "TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA": 0x000D, + "TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA": 0x000E, + "TLS_DH_RSA_WITH_DES_CBC_SHA": 0x000F, + "TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA": 0x0010, + "TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA": 0x0011, + "TLS_DHE_DSS_WITH_DES_CBC_SHA": 0x0012, + "TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA": 0x0013, + "TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA": 0x0014, + "TLS_DHE_RSA_WITH_DES_CBC_SHA": 0x0015, + "TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA": 0x0016, + "TLS_DH_anon_EXPORT_WITH_RC4_40_MD5": 0x0017, + "TLS_DH_anon_WITH_RC4_128_MD5": 0x0018, + "TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA": 0x0019, + "TLS_DH_anon_WITH_DES_CBC_SHA": 0x001A, + "TLS_DH_anon_WITH_3DES_EDE_CBC_SHA": 0x001B, + + "TLS_KRB5_WITH_DES_CBC_SHA": 0x001E, + "TLS_KRB5_WITH_3DES_EDE_CBC_SHA": 0x001F, + "TLS_KRB5_WITH_RC4_128_SHA": 0x0020, + "TLS_KRB5_WITH_IDEA_CBC_SHA": 0x0021, + "TLS_KRB5_WITH_DES_CBC_MD5": 0x0022, + "TLS_KRB5_WITH_3DES_EDE_CBC_MD5": 0x0023, + "TLS_KRB5_WITH_RC4_128_MD5": 0x0024, + "TLS_KRB5_WITH_IDEA_CBC_MD5": 0x0025, + "TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA": 0x0026, + "TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA": 0x0027, + "TLS_KRB5_EXPORT_WITH_RC4_40_SHA": 0x0028, + "TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5": 0x0029, + "TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5": 0x002A, + "TLS_KRB5_EXPORT_WITH_RC4_40_MD5": 0x002B, + "TLS_PSK_WITH_NULL_SHA": 0x002C, + "TLS_DHE_PSK_WITH_NULL_SHA": 0x002D, + "TLS_RSA_PSK_WITH_NULL_SHA": 0x002E, + "TLS_RSA_WITH_AES_128_CBC_SHA": 0x002F, + "TLS_DH_DSS_WITH_AES_128_CBC_SHA": 0x0030, + "TLS_DH_RSA_WITH_AES_128_CBC_SHA": 0x0031, + "TLS_DHE_DSS_WITH_AES_128_CBC_SHA": 0x0032, + "TLS_DHE_RSA_WITH_AES_128_CBC_SHA": 0x0033, + "TLS_DH_anon_WITH_AES_128_CBC_SHA": 0x0034, + "TLS_RSA_WITH_AES_256_CBC_SHA": 0x0035, + "TLS_DH_DSS_WITH_AES_256_CBC_SHA": 0x0036, + "TLS_DH_RSA_WITH_AES_256_CBC_SHA": 0x0037, + "TLS_DHE_DSS_WITH_AES_256_CBC_SHA": 0x0038, + "TLS_DHE_RSA_WITH_AES_256_CBC_SHA": 0x0039, + "TLS_DH_anon_WITH_AES_256_CBC_SHA": 0x003A, + "TLS_RSA_WITH_NULL_SHA256": 0x003B, + "TLS_RSA_WITH_AES_128_CBC_SHA256": 0x003C, + "TLS_RSA_WITH_AES_256_CBC_SHA256": 0x003D, + "TLS_DH_DSS_WITH_AES_128_CBC_SHA256": 0x003E, + "TLS_DH_RSA_WITH_AES_128_CBC_SHA256": 0x003F, + "TLS_DHE_DSS_WITH_AES_128_CBC_SHA256": 0x0040, + "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA": 0x0041, + "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA": 0x0042, + "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA": 0x0043, + "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA": 0x0044, + "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA": 0x0045, + "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA": 0x0046, + + "TLS_DHE_RSA_WITH_AES_128_CBC_SHA256": 0x0067, + "TLS_DH_DSS_WITH_AES_256_CBC_SHA256": 0x0068, + "TLS_DH_RSA_WITH_AES_256_CBC_SHA256": 0x0069, + "TLS_DHE_DSS_WITH_AES_256_CBC_SHA256": 0x006A, + "TLS_DHE_RSA_WITH_AES_256_CBC_SHA256": 0x006B, + "TLS_DH_anon_WITH_AES_128_CBC_SHA256": 0x006C, + "TLS_DH_anon_WITH_AES_256_CBC_SHA256": 0x006D, + + "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA": 0x0084, + "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA": 0x0085, + "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA": 0x0086, + "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA": 0x0087, + "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA": 0x0088, + "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA": 0x0089, + "TLS_PSK_WITH_RC4_128_SHA": 0x008A, + "TLS_PSK_WITH_3DES_EDE_CBC_SHA": 0x008B, + "TLS_PSK_WITH_AES_128_CBC_SHA": 0x008C, + "TLS_PSK_WITH_AES_256_CBC_SHA": 0x008D, + "TLS_DHE_PSK_WITH_RC4_128_SHA": 0x008E, + "TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA": 0x008F, + "TLS_DHE_PSK_WITH_AES_128_CBC_SHA": 0x0090, + "TLS_DHE_PSK_WITH_AES_256_CBC_SHA": 0x0091, + "TLS_RSA_PSK_WITH_RC4_128_SHA": 0x0092, + "TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA": 0x0093, + "TLS_RSA_PSK_WITH_AES_128_CBC_SHA": 0x0094, + "TLS_RSA_PSK_WITH_AES_256_CBC_SHA": 0x0095, + "TLS_RSA_WITH_SEED_CBC_SHA": 0x0096, + "TLS_DH_DSS_WITH_SEED_CBC_SHA": 0x0097, + "TLS_DH_RSA_WITH_SEED_CBC_SHA": 0x0098, + "TLS_DHE_DSS_WITH_SEED_CBC_SHA": 0x0099, + "TLS_DHE_RSA_WITH_SEED_CBC_SHA": 0x009A, + "TLS_DH_anon_WITH_SEED_CBC_SHA": 0x009B, + "TLS_RSA_WITH_AES_128_GCM_SHA256": 0x009C, + "TLS_RSA_WITH_AES_256_GCM_SHA384": 0x009D, + "TLS_DHE_RSA_WITH_AES_128_GCM_SHA256": 0x009E, + "TLS_DHE_RSA_WITH_AES_256_GCM_SHA384": 0x009F, + "TLS_DH_RSA_WITH_AES_128_GCM_SHA256": 0x00A0, + "TLS_DH_RSA_WITH_AES_256_GCM_SHA384": 0x00A1, + "TLS_DHE_DSS_WITH_AES_128_GCM_SHA256": 0x00A2, + "TLS_DHE_DSS_WITH_AES_256_GCM_SHA384": 0x00A3, + "TLS_DH_DSS_WITH_AES_128_GCM_SHA256": 0x00A4, + "TLS_DH_DSS_WITH_AES_256_GCM_SHA384": 0x00A5, + "TLS_DH_anon_WITH_AES_128_GCM_SHA256": 0x00A6, + "TLS_DH_anon_WITH_AES_256_GCM_SHA384": 0x00A7, + "TLS_PSK_WITH_AES_128_GCM_SHA256": 0x00A8, + "TLS_PSK_WITH_AES_256_GCM_SHA384": 0x00A9, + "TLS_DHE_PSK_WITH_AES_128_GCM_SHA256": 0x00AA, + "TLS_DHE_PSK_WITH_AES_256_GCM_SHA384": 0x00AB, + "TLS_RSA_PSK_WITH_AES_128_GCM_SHA256": 0x00AC, + "TLS_RSA_PSK_WITH_AES_256_GCM_SHA384": 0x00AD, + "TLS_PSK_WITH_AES_128_CBC_SHA256": 0x00AE, + "TLS_PSK_WITH_AES_256_CBC_SHA384": 0x00AF, + "TLS_PSK_WITH_NULL_SHA256": 0x00B0, + "TLS_PSK_WITH_NULL_SHA384": 0x00B1, + "TLS_DHE_PSK_WITH_AES_128_CBC_SHA256": 0x00B2, + "TLS_DHE_PSK_WITH_AES_256_CBC_SHA384": 0x00B3, + "TLS_DHE_PSK_WITH_NULL_SHA256": 0x00B4, + "TLS_DHE_PSK_WITH_NULL_SHA384": 0x00B5, + "TLS_RSA_PSK_WITH_AES_128_CBC_SHA256": 0x00B6, + "TLS_RSA_PSK_WITH_AES_256_CBC_SHA384": 0x00B7, + "TLS_RSA_PSK_WITH_NULL_SHA256": 0x00B8, + "TLS_RSA_PSK_WITH_NULL_SHA384": 0x00B9, + "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256": 0x00BA, + "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256": 0x00BB, + "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256": 0x00BC, + "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256": 0x00BD, + "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256": 0x00BE, + "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256": 0x00BF, + "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256": 0x00C0, + "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256": 0x00C1, + "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256": 0x00C2, + "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256": 0x00C3, + "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256": 0x00C4, + "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256": 0x00C5, + "TLS_SM4_GCM_SM3": 0x00C6, + "TLS_SM4_CCM_SM3": 0x00C7, + + "TLS_EMPTY_RENEGOTIATION_INFO_SCSV": 0x00FF, + + "TLS_AES_128_GCM_SHA256": 0x1301, + "TLS_AES_256_GCM_SHA384": 0x1302, + "TLS_CHACHA20_POLY1305_SHA256": 0x1303, + "TLS_AES_128_CCM_SHA256": 0x1304, + "TLS_AES_128_CCM_8_SHA256": 0x1305, + "TLS_AEGIS_256_SHA384": 0x1306, + "TLS_AEGIS_128L_SHA256": 0x1307, + + "TLS_FALLBACK_SCSV": 0x5600, + + "TLS_ECDH_ECDSA_WITH_NULL_SHA": 0xC001, + "TLS_ECDH_ECDSA_WITH_RC4_128_SHA": 0xC002, + "TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA": 0xC003, + "TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA": 0xC004, + "TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA": 0xC005, + "TLS_ECDHE_ECDSA_WITH_NULL_SHA": 0xC006, + "TLS_ECDHE_ECDSA_WITH_RC4_128_SHA": 0xC007, + "TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA": 0xC008, + "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA": 0xC009, + "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA": 0xC00A, + "TLS_ECDH_RSA_WITH_NULL_SHA": 0xC00B, + "TLS_ECDH_RSA_WITH_RC4_128_SHA": 0xC00C, + "TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA": 0xC00D, + "TLS_ECDH_RSA_WITH_AES_128_CBC_SHA": 0xC00E, + "TLS_ECDH_RSA_WITH_AES_256_CBC_SHA": 0xC00F, + "TLS_ECDHE_RSA_WITH_NULL_SHA": 0xC010, + "TLS_ECDHE_RSA_WITH_RC4_128_SHA": 0xC011, + "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA": 0xC012, + "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA": 0xC013, + "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA": 0xC014, + "TLS_ECDH_anon_WITH_NULL_SHA": 0xC015, + "TLS_ECDH_anon_WITH_RC4_128_SHA": 0xC016, + "TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA": 0xC017, + "TLS_ECDH_anon_WITH_AES_128_CBC_SHA": 0xC018, + "TLS_ECDH_anon_WITH_AES_256_CBC_SHA": 0xC019, + "TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA": 0xC01A, + "TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA": 0xC01B, + "TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA": 0xC01C, + "TLS_SRP_SHA_WITH_AES_128_CBC_SHA": 0xC01D, + "TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA": 0xC01E, + "TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA": 0xC01F, + "TLS_SRP_SHA_WITH_AES_256_CBC_SHA": 0xC020, + "TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA": 0xC021, + "TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA": 0xC022, + "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256": 0xC023, + "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384": 0xC024, + "TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256": 0xC025, + "TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384": 0xC026, + "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256": 0xC027, + "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384": 0xC028, + "TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256": 0xC029, + "TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384": 0xC02A, + "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256": 0xC02B, + "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384": 0xC02C, + "TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256": 0xC02D, + "TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384": 0xC02E, + "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256": 0xC02F, + "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384": 0xC030, + "TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256": 0xC031, + "TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384": 0xC032, + "TLS_ECDHE_PSK_WITH_RC4_128_SHA": 0xC033, + "TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA": 0xC034, + "TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA": 0xC035, + "TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA": 0xC036, + "TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256": 0xC037, + "TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384": 0xC038, + "TLS_ECDHE_PSK_WITH_NULL_SHA": 0xC039, + "TLS_ECDHE_PSK_WITH_NULL_SHA256": 0xC03A, + "TLS_ECDHE_PSK_WITH_NULL_SHA384": 0xC03B, + "TLS_RSA_WITH_ARIA_128_CBC_SHA256": 0xC03C, + "TLS_RSA_WITH_ARIA_256_CBC_SHA384": 0xC03D, + "TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256": 0xC03E, + "TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384": 0xC03F, + "TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256": 0xC040, + "TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384": 0xC041, + "TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256": 0xC042, + "TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384": 0xC043, + "TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256": 0xC044, + "TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384": 0xC045, + "TLS_DH_anon_WITH_ARIA_128_CBC_SHA256": 0xC046, + "TLS_DH_anon_WITH_ARIA_256_CBC_SHA384": 0xC047, + "TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256": 0xC048, + "TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384": 0xC049, + "TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256": 0xC04A, + "TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384": 0xC04B, + "TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256": 0xC04C, + "TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384": 0xC04D, + "TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256": 0xC04E, + "TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384": 0xC04F, + "TLS_RSA_WITH_ARIA_128_GCM_SHA256": 0xC050, + "TLS_RSA_WITH_ARIA_256_GCM_SHA384": 0xC051, + "TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256": 0xC052, + "TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384": 0xC053, + "TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256": 0xC054, + "TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384": 0xC055, + "TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256": 0xC056, + "TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384": 0xC057, + "TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256": 0xC058, + "TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384": 0xC059, + "TLS_DH_anon_WITH_ARIA_128_GCM_SHA256": 0xC05A, + "TLS_DH_anon_WITH_ARIA_256_GCM_SHA384": 0xC05B, + "TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256": 0xC05C, + "TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384": 0xC05D, + "TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256": 0xC05E, + "TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384": 0xC05F, + "TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256": 0xC060, + "TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384": 0xC061, + "TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256": 0xC062, + "TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384": 0xC063, + "TLS_PSK_WITH_ARIA_128_CBC_SHA256": 0xC064, + "TLS_PSK_WITH_ARIA_256_CBC_SHA384": 0xC065, + "TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256": 0xC066, + "TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384": 0xC067, + "TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256": 0xC068, + "TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384": 0xC069, + "TLS_PSK_WITH_ARIA_128_GCM_SHA256": 0xC06A, + "TLS_PSK_WITH_ARIA_256_GCM_SHA384": 0xC06B, + "TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256": 0xC06C, + "TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384": 0xC06D, + "TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256": 0xC06E, + "TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384": 0xC06F, + "TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256": 0xC070, + "TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384": 0xC071, + "TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256": 0xC072, + "TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384": 0xC073, + "TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256": 0xC074, + "TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384": 0xC075, + "TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256": 0xC076, + "TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384": 0xC077, + "TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256": 0xC078, + "TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384": 0xC079, + "TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC07A, + "TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC07B, + "TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC07C, + "TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC07D, + "TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC07E, + "TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC07F, + "TLS_DHE_DSS_WITH_CAMELLIA_128_GCM_SHA256": 0xC080, + "TLS_DHE_DSS_WITH_CAMELLIA_256_GCM_SHA384": 0xC081, + "TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256": 0xC082, + "TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384": 0xC083, + "TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256": 0xC084, + "TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384": 0xC085, + "TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC086, + "TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC087, + "TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC088, + "TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC089, + "TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC08A, + "TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC08B, + "TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC08C, + "TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC08D, + "TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256": 0xC08E, + "TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384": 0xC08F, + "TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256": 0xC090, + "TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384": 0xC091, + "TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256": 0xC092, + "TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384": 0xC093, + "TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256": 0xC094, + "TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384": 0xC095, + "TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256": 0xC096, + "TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384": 0xC097, + "TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256": 0xC098, + "TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384": 0xC099, + "TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256": 0xC09A, + "TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384": 0xC09B, + "TLS_RSA_WITH_AES_128_CCM": 0xC09C, + "TLS_RSA_WITH_AES_256_CCM": 0xC09D, + "TLS_DHE_RSA_WITH_AES_128_CCM": 0xC09E, + "TLS_DHE_RSA_WITH_AES_256_CCM": 0xC09F, + "TLS_RSA_WITH_AES_128_CCM_8": 0xC0A0, + "TLS_RSA_WITH_AES_256_CCM_8": 0xC0A1, + "TLS_DHE_RSA_WITH_AES_128_CCM_8": 0xC0A2, + "TLS_DHE_RSA_WITH_AES_256_CCM_8": 0xC0A3, + "TLS_PSK_WITH_AES_128_CCM": 0xC0A4, + "TLS_PSK_WITH_AES_256_CCM": 0xC0A5, + "TLS_DHE_PSK_WITH_AES_128_CCM": 0xC0A6, + "TLS_DHE_PSK_WITH_AES_256_CCM": 0xC0A7, + "TLS_PSK_WITH_AES_128_CCM_8": 0xC0A8, + "TLS_PSK_WITH_AES_256_CCM_8": 0xC0A9, + "TLS_PSK_DHE_WITH_AES_128_CCM_8": 0xC0AA, + "TLS_PSK_DHE_WITH_AES_256_CCM_8": 0xC0AB, + "TLS_ECDHE_ECDSA_WITH_AES_128_CCM": 0xC0AC, + "TLS_ECDHE_ECDSA_WITH_AES_256_CCM": 0xC0AD, + "TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8": 0xC0AE, + "TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8": 0xC0AF, + "TLS_ECCPWD_WITH_AES_128_GCM_SHA256": 0xC0B0, + "TLS_ECCPWD_WITH_AES_256_GCM_SHA384": 0xC0B1, + "TLS_ECCPWD_WITH_AES_128_CCM_SHA256": 0xC0B2, + "TLS_ECCPWD_WITH_AES_256_CCM_SHA384": 0xC0B3, + "TLS_SHA256_SHA256": 0xC0B4, + "TLS_SHA384_SHA384": 0xC0B5, + + "TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC": 0xC100, + "TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC": 0xC101, + "TLS_GOSTR341112_256_WITH_28147_CNT_IMIT": 0xC102, + "TLS_GOSTR341112_256_WITH_KUZNYECHIK_MGM_L": 0xC103, + "TLS_GOSTR341112_256_WITH_MAGMA_MGM_L": 0xC104, + "TLS_GOSTR341112_256_WITH_KUZNYECHIK_MGM_S": 0xC105, + "TLS_GOSTR341112_256_WITH_MAGMA_MGM_S": 0xC106, + + "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256": 0xCCA8, + "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256": 0xCCA9, + "TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256": 0xCCAA, + "TLS_PSK_WITH_CHACHA20_POLY1305_SHA256": 0xCCAB, + "TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256": 0xCCAC, + "TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256": 0xCCAD, + "TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256": 0xCCAE, + + "TLS_ECDHE_PSK_WITH_AES_128_GCM_SHA256": 0xD001, + "TLS_ECDHE_PSK_WITH_AES_256_GCM_SHA384": 0xD002, + "TLS_ECDHE_PSK_WITH_AES_128_CCM_8_SHA256": 0xD003, + + "TLS_ECDHE_PSK_WITH_AES_128_CCM_SHA256": 0xD005, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/clientcertificatetype_identifiers.go b/backend/vendor/github.com/enetx/utls/dicttls/clientcertificatetype_identifiers.go new file mode 100644 index 0000000..c022bfd --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/clientcertificatetype_identifiers.go @@ -0,0 +1,49 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-2 +// last updated: March 2023 + +const ( + ClientCertTypeIdentifier_rsa_sign uint8 = 1 + ClientCertTypeIdentifier_dss_sign uint8 = 2 + ClientCertTypeIdentifier_rsa_fixed_dh uint8 = 3 + ClientCertTypeIdentifier_dss_fixed_dh uint8 = 4 + ClientCertTypeIdentifier_rsa_ephemeral_dh uint8 = 5 + ClientCertTypeIdentifier_dss_ephemeral_dh uint8 = 6 + ClientCertTypeIdentifier_fortezza_dms uint8 = 20 + ClientCertTypeIdentifier_ecdsa_sign uint8 = 64 + ClientCertTypeIdentifier_rsa_fixed_ecdh uint8 = 65 + ClientCertTypeIdentifier_ecdsa_fixed_ecdh uint8 = 66 + ClientCertTypeIdentifier_gost_sign256 uint8 = 67 + ClientCertTypeIdentifier_gost_sign512 uint8 = 68 +) + +var DictClientCertificateTypeIdentifierValueIndexed = map[uint8]string{ + 1: "rsa_sign", + 2: "dss_sign", + 3: "rsa_fixed_dh", + 4: "dss_fixed_dh", + 5: "rsa_ephemeral_dh", + 6: "dss_ephemeral_dh", + 20: "fortezza_dms", + 64: "ecdsa_sign", + 65: "rsa_fixed_ecdh", + 66: "ecdsa_fixed_ecdh", + 67: "gost_sign256", + 68: "gost_sign512", +} + +var DictClientCertificateTypeIdentifierNameIndexed = map[string]uint8{ + "rsa_sign": 1, + "dss_sign": 2, + "rsa_fixed_dh": 3, + "dss_fixed_dh": 4, + "rsa_ephemeral_dh": 5, + "dss_ephemeral_dh": 6, + "fortezza_dms": 20, + "ecdsa_sign": 64, + "rsa_fixed_ecdh": 65, + "ecdsa_fixed_ecdh": 66, + "gost_sign256": 67, + "gost_sign512": 68, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/comp_meth_ids.go b/backend/vendor/github.com/enetx/utls/dicttls/comp_meth_ids.go new file mode 100644 index 0000000..a3f951d --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/comp_meth_ids.go @@ -0,0 +1,22 @@ +package dicttls + +// source: https://www.iana.org/assignments/comp-meth-ids/comp-meth-ids-2.csv +// last updated: March 2023 + +const ( + CompMeth_NULL uint8 = 0 + CompMeth_DEFLATE uint8 = 1 + CompMeth_LZS uint8 = 64 +) + +var DictCompMethValueIndexed = map[uint8]string{ + 0: "NULL", + 1: "DEFLATE", + 64: "LZS", +} + +var DictCompMethNameIndexed = map[string]uint8{ + "NULL": 0, + "DEFLATE": 1, + "LZS": 64, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/contenttype.go b/backend/vendor/github.com/enetx/utls/dicttls/contenttype.go new file mode 100644 index 0000000..b54c84d --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/contenttype.go @@ -0,0 +1,34 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-5 +// last updated: March 2023 + +const ( + ContentType_change_cipher_spec uint8 = 20 + ContentType_alert uint8 = 21 + ContentType_handshake uint8 = 22 + ContentType_application_data uint8 = 23 + ContentType_heartbeat uint8 = 24 + ContentType_tls12_cid uint8 = 25 + ContentType_ACK uint8 = 26 +) + +var DictContentTypeValueIndexed = map[uint8]string{ + 20: "change_cipher_spec", + 21: "alert", + 22: "handshake", + 23: "application_data", + 24: "heartbeat", + 25: "tls12_cid", + 26: "ACK", +} + +var DictContentTypeNameIndexed = map[string]uint8{ + "change_cipher_spec": 20, + "alert": 21, + "handshake": 22, + "application_data": 23, + "heartbeat": 24, + "tls12_cid": 25, + "ACK": 26, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/ec_curve_types.go b/backend/vendor/github.com/enetx/utls/dicttls/ec_curve_types.go new file mode 100644 index 0000000..c15db24 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/ec_curve_types.go @@ -0,0 +1,22 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-10 +// last updated: March 2023 + +const ( + ECCurve_explicit_prime uint16 = 1 + ECCurve_explicit_char2 uint16 = 2 + ECCurve_named_curve uint16 = 3 +) + +var DictECCurveTypeValueIndexed = map[uint16]string{ + 1: "explicit_prime", + 2: "explicit_char2", + 3: "named_curve", +} + +var DictECCurveTypeNameIndexed = map[string]uint16{ + "explicit_prime": 1, + "explicit_char2": 2, + "named_curve": 3, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/ec_point_formats.go b/backend/vendor/github.com/enetx/utls/dicttls/ec_point_formats.go new file mode 100644 index 0000000..bfe44bb --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/ec_point_formats.go @@ -0,0 +1,22 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-9 +// last updated: March 2023 + +const ( + ECPoint_uncompressed uint8 = 0 + ECPoint_ansiX962_compressed_prime uint8 = 1 + ECPoint_ansiX962_compressed_char2 uint8 = 2 +) + +var DictECPointFormatValueIndexed = map[uint8]string{ + 0: "uncompressed", + 1: "ansiX962_compressed_prime", + 2: "ansiX962_compressed_char2", +} + +var DictECPointFormatNameIndexed = map[string]uint8{ + "uncompressed": 0, + "ansiX962_compressed_prime": 1, + "ansiX962_compressed_char2": 2, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/exttype_values.go b/backend/vendor/github.com/enetx/utls/dicttls/exttype_values.go new file mode 100644 index 0000000..cb0ef40 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/exttype_values.go @@ -0,0 +1,212 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#tls-extensiontype-values-1 +// last updated: March 2023 + +const ( + ExtType_server_name uint16 = 0 + ExtType_max_fragment_length uint16 = 1 + ExtType_client_certificate_url uint16 = 2 + ExtType_trusted_ca_keys uint16 = 3 + ExtType_truncated_hmac uint16 = 4 + ExtType_status_request uint16 = 5 + ExtType_user_mapping uint16 = 6 + ExtType_client_authz uint16 = 7 + ExtType_server_authz uint16 = 8 + ExtType_cert_type uint16 = 9 + ExtType_supported_groups uint16 = 10 + ExtType_ec_point_formats uint16 = 11 + ExtType_srp uint16 = 12 + ExtType_signature_algorithms uint16 = 13 + ExtType_use_srtp uint16 = 14 + ExtType_heartbeat uint16 = 15 + ExtType_application_layer_protocol_negotiation uint16 = 16 + ExtType_status_request_v2 uint16 = 17 + ExtType_signed_certificate_timestamp uint16 = 18 + ExtType_client_certificate_type uint16 = 19 + ExtType_server_certificate_type uint16 = 20 + ExtType_padding uint16 = 21 + ExtType_encrypt_then_mac uint16 = 22 + ExtType_extended_master_secret uint16 = 23 + ExtType_token_binding uint16 = 24 + ExtType_cached_info uint16 = 25 + ExtType_tls_lts uint16 = 26 + ExtType_compress_certificate uint16 = 27 + ExtType_record_size_limit uint16 = 28 + ExtType_pwd_protect uint16 = 29 + ExtType_pwd_clear uint16 = 30 + ExtType_password_salt uint16 = 31 + ExtType_ticket_pinning uint16 = 32 + ExtType_tls_cert_with_extern_psk uint16 = 33 + ExtType_delegated_credentials uint16 = 34 // IANA name: delegated_credentials, IETF name: delegated_credential + ExtType_session_ticket uint16 = 35 + ExtType_TLMSP uint16 = 36 + ExtType_TLMSP_proxying uint16 = 37 + ExtType_TLMSP_delegate uint16 = 38 + ExtType_supported_ekt_ciphers uint16 = 39 + ExtType_pre_shared_key uint16 = 41 + ExtType_early_data uint16 = 42 + ExtType_supported_versions uint16 = 43 + ExtType_cookie uint16 = 44 + ExtType_psk_key_exchange_modes uint16 = 45 + ExtType_certificate_authorities uint16 = 47 + ExtType_oid_filters uint16 = 48 + ExtType_post_handshake_auth uint16 = 49 + ExtType_signature_algorithms_cert uint16 = 50 + ExtType_key_share uint16 = 51 + ExtType_transparency_info uint16 = 52 + ExtType_connection_id_deprecated uint16 = 53 // deprecated + ExtType_connection_id uint16 = 54 + ExtType_external_id_hash uint16 = 55 + ExtType_external_session_id uint16 = 56 + ExtType_quic_transport_parameters uint16 = 57 + ExtType_ticket_request uint16 = 58 + ExtType_dnssec_chain uint16 = 59 + ExtType_renegotiation_info uint16 = 65281 +) + +// Not IANA assigned +const ( + ExtType_next_protocol_negotiation uint16 = 13172 // https://datatracker.ietf.org/doc/html/draft-agl-tls-nextprotoneg-04 + ExtType_application_settings uint16 = 17513 // https://www.ietf.org/archive/id/draft-vvv-tls-alps-01.html + ExtType_application_settings_new uint16 = 17613 // https://www.ietf.org/archive/id/draft-vvv-tls-alps-01.html + ExtType_channel_id_old uint16 = 30031 // https://datatracker.ietf.org/doc/html/draft-balfanz-tls-channelid-01 + ExtType_channel_id uint16 = 30032 // https://datatracker.ietf.org/doc/html/draft-balfanz-tls-channelid-01 +) + +var DictExtTypeValueIndexed = map[uint16]string{ + 0: "server_name", + 1: "max_fragment_length", + 2: "client_certificate_url", + 3: "trusted_ca_keys", + 4: "truncated_hmac", + 5: "status_request", + 6: "user_mapping", + 7: "client_authz", + 8: "server_authz", + 9: "cert_type", + 10: "supported_groups", + 11: "ec_point_formats", + 12: "srp", + 13: "signature_algorithms", + 14: "use_srtp", + 15: "heartbeat", + 16: "application_layer_protocol_negotiation", + 17: "status_request_v2", + 18: "signed_certificate_timestamp", + 19: "client_certificate_type", + 20: "server_certificate_type", + 21: "padding", + 22: "encrypt_then_mac", + 23: "extended_master_secret", + 24: "token_binding", + 25: "cached_info", + 26: "tls_lts", + 27: "compress_certificate", + 28: "record_size_limit", + 29: "pwd_protect", + 30: "pwd_clear", + 31: "password_salt", + 32: "ticket_pinning", + 33: "tls_cert_with_extern_psk", + 34: "delegated_credentials", // IANA name: delegated_credentials, IETF name: delegated_credential + 35: "session_ticket", + 36: "TLMSP", + 37: "TLMSP_proxying", + 38: "TLMSP_delegate", + 39: "supported_ekt_ciphers", + 41: "pre_shared_key", + 42: "early_data", + 43: "supported_versions", + 44: "cookie", + 45: "psk_key_exchange_modes", + 47: "certificate_authorities", + 48: "oid_filters", + 49: "post_handshake_auth", + 50: "signature_algorithms_cert", + 51: "key_share", + 52: "transparency_info", + 53: "connection_id_deprecated", // deprecated + 54: "connection_id", + 55: "external_id_hash", + 56: "external_session_id", + 57: "quic_transport_parameters", + 58: "ticket_request", + 59: "dnssec_chain", + 65281: "renegotiation_info", + + 13172: "next_protocol_negotiation", + 17513: "application_settings", + 17613: "application_settings_new", + 30031: "channel_id_old", + 30032: "channel_id", +} + +var DictExtTypeNameIndexed = map[string]uint16{ + "server_name": 0, + "max_fragment_length": 1, + "client_certificate_url": 2, + "trusted_ca_keys": 3, + "truncated_hmac": 4, + "status_request": 5, + "user_mapping": 6, + "client_authz": 7, + "server_authz": 8, + "cert_type": 9, + "supported_groups": 10, + "ec_point_formats": 11, + "srp": 12, + "signature_algorithms": 13, + "use_srtp": 14, + "heartbeat": 15, + "application_layer_protocol_negotiation": 16, + "status_request_v2": 17, + "signed_certificate_timestamp": 18, + "client_certificate_type": 19, + "server_certificate_type": 20, + "padding": 21, + "encrypt_then_mac": 22, + "extended_master_secret": 23, + "token_binding": 24, + "cached_info": 25, + "tls_lts": 26, + "compress_certificate": 27, + "record_size_limit": 28, + "pwd_protect": 29, + "pwd_clear": 30, + "password_salt": 31, + "ticket_pinning": 32, + "tls_cert_with_extern_psk": 33, + "delegated_credentials": 34, // IANA name: delegated_credentials + "delegated_credential": 34, // IETF name: delegated_credential + "session_ticket": 35, + "TLMSP": 36, + "TLMSP_proxying": 37, + "TLMSP_delegate": 38, + "supported_ekt_ciphers": 39, + "pre_shared_key": 41, + "early_data": 42, + "supported_versions": 43, + "cookie": 44, + "psk_key_exchange_modes": 45, + "certificate_authorities": 47, + "oid_filters": 48, + "post_handshake_auth": 49, + "signature_algorithms_cert": 50, + "key_share": 51, + "transparency_info": 52, + "connection_id_deprecated": 53, // deprecated + "connection_id": 54, + "external_id_hash": 55, + "external_session_id": 56, + "quic_transport_parameters": 57, + "ticket_request": 58, + "dnssec_chain": 59, + "renegotiation_info": 65281, + + "next_protocol_negotiation": 13172, + "application_settings": 17513, + "application_settings_new": 17613, + "channel_id_old": 30031, + "channel_id": 30032, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/handshaketype.go b/backend/vendor/github.com/enetx/utls/dicttls/handshaketype.go new file mode 100644 index 0000000..798a1c3 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/handshaketype.go @@ -0,0 +1,96 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-7 +// last updated: March 2023 + +const ( + HandshakeType_hello_request uint8 = 0 + HandshakeType_client_hello uint8 = 1 + HandshakeType_server_hello uint8 = 2 + HandshakeType_hello_verify_request uint8 = 3 + HandshakeType_new_session_ticket uint8 = 4 + HandshakeType_end_of_early_data uint8 = 5 + HandshakeType_hello_retry_request uint8 = 6 + HandshakeType_encrypted_extensions uint8 = 8 + HandshakeType_request_connection_id uint8 = 9 + HandshakeType_new_connection_id uint8 = 10 + HandshakeType_certificate uint8 = 11 + HandshakeType_server_key_exchange uint8 = 12 + HandshakeType_certificate_request uint8 = 13 + HandshakeType_server_hello_done uint8 = 14 + HandshakeType_certificate_verify uint8 = 15 + HandshakeType_client_key_exchange uint8 = 16 + HandshakeType_client_certificate_request uint8 = 17 + HandshakeType_finished uint8 = 20 + HandshakeType_certificate_url uint8 = 21 + HandshakeType_certificate_status uint8 = 22 + HandshakeType_supplemental_data uint8 = 23 + HandshakeType_key_update uint8 = 24 + HandshakeType_compressed_certificate uint8 = 25 + HandshakeType_ekt_key uint8 = 26 + HandshakeType_message_hash uint8 = 254 + + // Not IANA assigned + HandshakeType_next_protocol uint8 = 67 +) + +var DictHandshakeTypeValueIndexed = map[uint8]string{ + 0: "hello_request", + 1: "client_hello", + 2: "server_hello", + 3: "hello_verify_request", + 4: "new_session_ticket", + 5: "end_of_early_data", + 6: "hello_retry_request", + 7: "Unassigned", + 8: "encrypted_extensions", + 9: "request_connection_id", + 10: "new_connection_id", + 11: "certificate", + 12: "server_key_exchange", + 13: "certificate_request", + 14: "server_hello_done", + 15: "certificate_verify", + 16: "client_key_exchange", + 17: "client_certificate_request", + 20: "finished", + 21: "certificate_url", + 22: "certificate_status", + 23: "supplemental_data", + 24: "key_update", + 25: "compressed_certificate", + 26: "ekt_key", + 254: "message_hash", + + 67: "next_protocol", +} + +var DictHandshakeTypeNameIndexed = map[string]uint8{ + "hello_request": 0, + "client_hello": 1, + "server_hello": 2, + "hello_verify_request": 3, + "new_session_ticket": 4, + "end_of_early_data": 5, + "hello_retry_request": 6, + "encrypted_extensions": 8, + "request_connection_id": 9, + "new_connection_id": 10, + "certificate": 11, + "server_key_exchange": 12, + "certificate_request": 13, + "server_hello_done": 14, + "certificate_verify": 15, + "client_key_exchange": 16, + "client_certificate_request": 17, + "finished": 20, + "certificate_url": 21, + "certificate_status": 22, + "supplemental_data": 23, + "key_update": 24, + "compressed_certificate": 25, + "ekt_key": 26, + "message_hash": 254, + + "next_protocol": 67, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/hashalgorithm.go b/backend/vendor/github.com/enetx/utls/dicttls/hashalgorithm.go new file mode 100644 index 0000000..24e6158 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/hashalgorithm.go @@ -0,0 +1,39 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-18 +// last updated: March 2023 + +const ( + HashAlg_none uint8 = 0 // deprecated in TLS 1.3 + HashAlg_md5 uint8 = 1 // deprecated in TLS 1.3 + HashAlg_sha1 uint8 = 2 + HashAlg_sha224 uint8 = 3 // deprecated in TLS 1.3 + HashAlg_sha256 uint8 = 4 + HashAlg_sha384 uint8 = 5 + HashAlg_sha512 uint8 = 6 + HashAlg_Intrinsic uint8 = 8 +) + +var DictHashAlgorithmValueIndexed = map[uint8]string{ + 0: "none", + 1: "md5", + 2: "sha1", + 3: "sha224", + 4: "sha256", + 5: "sha384", + 6: "sha512", + 7: "Reserved", + 8: "Intrinsic", +} + +var DictHashAlgorithmNameIndexed = map[string]uint8{ + "none": 0, + "md5": 1, + "sha1": 2, + "sha224": 3, + "sha256": 4, + "sha384": 5, + "sha512": 6, + "Reserved": 7, + "Intrinsic": 8, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/heartbeat_message_types.go b/backend/vendor/github.com/enetx/utls/dicttls/heartbeat_message_types.go new file mode 100644 index 0000000..0b076be --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/heartbeat_message_types.go @@ -0,0 +1,19 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/heartbeat-message-types.csv +// last updated: March 2023 + +const ( + HeartbeatMessage_request uint8 = 1 + HeartbeatMessage_response uint8 = 2 +) + +var DictHeartbeatMessageTypeValueIndexed = map[uint8]string{ + 1: "heartbeat_request", + 2: "heartbeat_response", +} + +var DictHeartbeatMessageTypeNameIndexed = map[string]uint8{ + "heartbeat_request": 1, + "heartbeat_response": 2, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/heartbeat_mode.go b/backend/vendor/github.com/enetx/utls/dicttls/heartbeat_mode.go new file mode 100644 index 0000000..747ae6e --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/heartbeat_mode.go @@ -0,0 +1,19 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/heartbeat-modes.csv +// last updated: March 2023 + +const ( + HeartbeatMode_peer_allowed_to_send uint8 = 1 + HeartbeatMode_peer_not_allowed_to_send uint8 = 2 +) + +var DictHeartbeatModeValueIndexed = map[uint8]string{ + 1: "peer_allowed_to_send", + 2: "peer_not_allowed_to_send", +} + +var DictHeartbeatModeNameIndexed = map[string]uint8{ + "peer_allowed_to_send": 1, + "peer_not_allowed_to_send": 2, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/hpke_aead_identifiers.go b/backend/vendor/github.com/enetx/utls/dicttls/hpke_aead_identifiers.go new file mode 100644 index 0000000..c4f8231 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/hpke_aead_identifiers.go @@ -0,0 +1,19 @@ +package dicttls + +// source: https://www.iana.org/assignments/hpke/hpke.xhtml +// last updated: December 2023 + +const ( + AEAD_AES_128_GCM uint16 = 0x0001 // NIST Special Publication 800-38D + AEAD_AES_256_GCM uint16 = 0x0002 // NIST Special Publication 800-38D + AEAD_CHACHA20_POLY1305 uint16 = 0x0003 // RFC 8439 + AEAD_EXPORT_ONLY uint16 = 0xFFFF // RFC 9180 +) + +var DictAEADIdentifierValueIndexed = map[uint16]string{ + 0x0000: "Reserved", // RFC 9180 + 0x0001: "AES-128-GCM", + 0x0002: "AES-256-GCM", + 0x0003: "ChaCha20Poly1305", + 0xFFFF: "Export-only", // RFC 9180 +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/hpke_kdf_identifiers.go b/backend/vendor/github.com/enetx/utls/dicttls/hpke_kdf_identifiers.go new file mode 100644 index 0000000..7471943 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/hpke_kdf_identifiers.go @@ -0,0 +1,24 @@ +package dicttls + +// source: https://www.iana.org/assignments/hpke/hpke.xhtml +// last updated: December 2023 + +const ( + HKDF_SHA256 uint16 = 0x0001 + HKDF_SHA384 uint16 = 0x0002 + HKDF_SHA512 uint16 = 0x0003 +) + +var DictKDFIdentifierValueIndexed = map[uint16]string{ + 0x0000: "Reserved", // RFC 9180 + 0x0001: "HKDF_SHA256", + 0x0002: "HKDF_SHA384", + 0x0003: "HKDF_SHA512", +} + +var DictKDFIdentifierNameIndexed = map[string]uint16{ + "Reserved": 0x0000, // RFC 9180 + "HKDF_SHA256": 0x0001, + "HKDF_SHA384": 0x0002, + "HKDF_SHA512": 0x0003, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/hpke_kem_identifiers.go b/backend/vendor/github.com/enetx/utls/dicttls/hpke_kem_identifiers.go new file mode 100644 index 0000000..213e7f8 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/hpke_kem_identifiers.go @@ -0,0 +1,53 @@ +package dicttls + +// source: https://www.iana.org/assignments/hpke/hpke.xhtml +// last updated: December 2023 + +const ( + DHKEM_P256_HKDF_SHA256 uint16 = 0x0010 // RFC 5869 + DHKEM_P384_HKDF_SHA384 uint16 = 0x0011 // RFC 5869 + DHKEM_P521_HKDF_SHA512 uint16 = 0x0012 // RFC 5869 + DHKEM_CP256_HKDF_SHA256 uint16 = 0x0013 // RFC 6090 + DHKEM_CP384_HKDF_SHA384 uint16 = 0x0014 // RFC 6090 + DHKEM_CP521_HKDF_SHA512 uint16 = 0x0015 // RFC 6090 + DHKEM_SECP256K1_HKDF_SHA256 uint16 = 0x0016 // draft-wahby-cfrg-hpke-kem-secp256k1-01 + + DHKEM_X25519_HKDF_SHA256 uint16 = 0x0020 // RFC 7748 + DHKEM_X448_HKDF_SHA512 uint16 = 0x0021 // RFC 7748 + + X25519_KYBER768_DRAFT00 uint16 = 0x0030 // draft-westerbaan-cfrg-hpke-xyber768d00-02 +) + +var DictKEMIdentifierValueIndexed = map[uint16]string{ + 0x0000: "Reserved", // RFC 9180 + + 0x0010: "DHKEM(P-256, HKDF-SHA256)", + 0x0011: "DHKEM(P-384, HKDF-SHA384)", + 0x0012: "DHKEM(P-521, HKDF-SHA512)", + 0x0013: "DHKEM(CP-256, HKDF-SHA256)", + 0x0014: "DHKEM(CP-384, HKDF-SHA384)", + 0x0015: "DHKEM(CP-521, HKDF-SHA512)", + 0x0016: "DHKEM(secp256k1, HKDF-SHA256)", + + 0x0020: "DHKEM(X25519, HKDF-SHA256)", + 0x0021: "DHKEM(X448, HKDF-SHA512)", + + 0x0030: "X25519Kyber768Draft00", +} + +var DictKEMIdentifierNameIndexed = map[string]uint16{ + "Reserved": 0x0000, // RFC 9180 + + "DHKEM(P-256, HKDF-SHA256)": 0x0010, + "DHKEM(P-384, HKDF-SHA384)": 0x0011, + "DHKEM(P-521, HKDF-SHA512)": 0x0012, + "DHKEM(CP-256, HKDF-SHA256)": 0x0013, + "DHKEM(CP-384, HKDF-SHA384)": 0x0014, + "DHKEM(CP-521, HKDF-SHA512)": 0x0015, + "DHKEM(secp256k1, HKDF-SHA256)": 0x0016, + + "DHKEM(X25519, HKDF-SHA256)": 0x0020, + "DHKEM(X448, HKDF-SHA512)": 0x0021, + + "X25519Kyber768Draft00": 0x0030, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/psk_key_exchange_mode.go b/backend/vendor/github.com/enetx/utls/dicttls/psk_key_exchange_mode.go new file mode 100644 index 0000000..7f3cc38 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/psk_key_exchange_mode.go @@ -0,0 +1,19 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-pskkeyexchangemode.csv +// last updated: March 2023 + +const ( + PSKKeyExchangeMode_psk_ke uint8 = 0 + PSKKeyExchangeMode_psk_dhe_ke uint8 = 1 +) + +var DictPSKKeyExchangeModeValueIndexed = map[uint8]string{ + 0: "psk_ke", + 1: "psk_dhe_ke", +} + +var DictPSKKeyExchangeModeNameIndexed = map[string]uint8{ + "psk_ke": 0, + "psk_dhe_ke": 1, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/quic_frame_types.go b/backend/vendor/github.com/enetx/utls/dicttls/quic_frame_types.go new file mode 100644 index 0000000..a7dd0ac --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/quic_frame_types.go @@ -0,0 +1,112 @@ +package dicttls + +// source: https://www.iana.org/assignments/quic/quic.xhtml#quic-frame-types +// last updated: July 2023 + +const ( + QUICFrameType_PADDING uint8 = 0x00 + QUICFrameType_PING uint8 = 0x01 + QUICFrameType_ACK uint8 = 0x02 + QUICFrameType_ACK_ecn uint8 = 0x03 + QUICFrameType_RESET_STREAM uint8 = 0x04 + QUICFrameType_STOP_SENDING uint8 = 0x05 + QUICFrameType_CRYPTO uint8 = 0x06 + QUICFrameType_NEW_TOKEN uint8 = 0x07 + QUICFrameType_STREAM uint8 = 0x08 + QUICFrameType_STREAM_fin uint8 = 0x09 + QUICFrameType_STREAM_len uint8 = 0x0a + QUICFrameType_STREAM_len_fin uint8 = 0x0b + QUICFrameType_STREAM_off uint8 = 0x0c + QUICFrameType_STREAM_off_fin uint8 = 0x0d + QUICFrameType_STREAM_off_len uint8 = 0x0e + QUICFrameType_STREAM_off_len_fin uint8 = 0x0f + QUICFrameType_MAX_DATA uint8 = 0x10 + QUICFrameType_MAX_STREAM_DATA uint8 = 0x11 + QUICFrameType_MAX_STREAMS_bidi uint8 = 0x12 + QUICFrameType_MAX_STREAMS_uni uint8 = 0x13 + QUICFrameType_DATA_BLOCKED uint8 = 0x14 + QUICFrameType_STREAM_DATA_BLOCKED uint8 = 0x15 + QUICFrameType_STREAMS_BLOCKED_bidi uint8 = 0x16 + QUICFrameType_STREAMS_BLOCKED_uni uint8 = 0x17 + QUICFrameType_NEW_CONNECTION_ID uint8 = 0x18 + QUICFrameType_RETIRE_CONNECTION_ID uint8 = 0x19 + QUICFrameType_PATH_CHALLENGE uint8 = 0x1a + QUICFrameType_PATH_RESPONSE uint8 = 0x1b + QUICFrameType_CONNECTION_CLOSE uint8 = 0x1c + QUICFrameType_CONNECTION_CLOSE_app uint8 = 0x1d + QUICFrameType_HANDSHAKE_DONE uint8 = 0x1e + QUICFrameType_DATAGRAM uint8 = 0x30 // RFC9221 + QUICFrameType_DATAGRAM_len uint8 = 0x31 // RFC9221 +) + +var DictQUICFrameTypeValueIndexed = map[uint8]string{ + 0x00: "PADDING", + 0x01: "PING", + 0x02: "ACK", + 0x03: "ACK_ecn", + 0x04: "RESET_STREAM", + 0x05: "STOP_SENDING", + 0x06: "CRYPTO", + 0x07: "NEW_TOKEN", + 0x08: "STREAM", + 0x09: "STREAM_fin", + 0x0a: "STREAM_len", + 0x0b: "STREAM_len_fin", + 0x0c: "STREAM_off", + 0x0d: "STREAM_off_fin", + 0x0e: "STREAM_off_len", + 0x0f: "STREAM_off_len_fin", + 0x10: "MAX_DATA", + 0x11: "MAX_STREAM_DATA", + 0x12: "MAX_STREAMS_bidi", + 0x13: "MAX_STREAMS_uni", + 0x14: "DATA_BLOCKED", + 0x15: "STREAM_DATA_BLOCKED", + 0x16: "STREAMS_BLOCKED_bidi", + 0x17: "STREAMS_BLOCKED_uni", + 0x18: "NEW_CONNECTION_ID", + 0x19: "RETIRE_CONNECTION_ID", + 0x1a: "PATH_CHALLENGE", + 0x1b: "PATH_RESPONSE", + 0x1c: "CONNECTION_CLOSE", + 0x1d: "CONNECTION_CLOSE_app", + 0x1e: "HANDSHAKE_DONE", + 0x30: "DATAGRAM", + 0x31: "DATAGRAM_len", +} + +var DictQUICFrameTypeNameIndexed = map[string]uint8{ + "PADDING": 0x00, + "PING": 0x01, + "ACK": 0x02, + "ACK_ecn": 0x03, + "RESET_STREAM": 0x04, + "STOP_SENDING": 0x05, + "CRYPTO": 0x06, + "NEW_TOKEN": 0x07, + "STREAM": 0x08, + "STREAM_fin": 0x09, + "STREAM_len": 0x0a, + "STREAM_len_fin": 0x0b, + "STREAM_off": 0x0c, + "STREAM_off_fin": 0x0d, + "STREAM_off_len": 0x0e, + "STREAM_off_len_fin": 0x0f, + "MAX_DATA": 0x10, + "MAX_STREAM_DATA": 0x11, + "MAX_STREAMS_bidi": 0x12, + "MAX_STREAMS_uni": 0x13, + "DATA_BLOCKED": 0x14, + "STREAM_DATA_BLOCKED": 0x15, + "STREAMS_BLOCKED_bidi": 0x16, + "STREAMS_BLOCKED_uni": 0x17, + "NEW_CONNECTION_ID": 0x18, + "RETIRE_CONNECTION_ID": 0x19, + "PATH_CHALLENGE": 0x1a, + "PATH_RESPONSE": 0x1b, + "CONNECTION_CLOSE": 0x1c, + "CONNECTION_CLOSE_app": 0x1d, + "HANDSHAKE_DONE": 0x1e, + "DATAGRAM": 0x30, + "DATAGRAM_len": 0x31, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/quic_transport_error_codes.go b/backend/vendor/github.com/enetx/utls/dicttls/quic_transport_error_codes.go new file mode 100644 index 0000000..52d2c8b --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/quic_transport_error_codes.go @@ -0,0 +1,70 @@ +package dicttls + +// source: https://www.iana.org/assignments/quic/quic.xhtml#quic-transport-error-codes +// last updated: July 2023 + +const ( + QUICTransportErrorCode_NO_ERROR uint16 = 0x0000 + QUICTransportErrorCode_INTERNAL_ERROR uint16 = 0x0001 + QUICTransportErrorCode_CONNECTION_REFUSED uint16 = 0x0002 + QUICTransportErrorCode_FLOW_CONTROL_ERROR uint16 = 0x0003 + QUICTransportErrorCode_STREAM_LIMIT_ERROR uint16 = 0x0004 + QUICTransportErrorCode_STREAM_STATE_ERROR uint16 = 0x0005 + QUICTransportErrorCode_FINAL_SIZE_ERROR uint16 = 0x0006 + QUICTransportErrorCode_FRAME_ENCODING_ERROR uint16 = 0x0007 + QUICTransportErrorCode_TRANSPORT_PARAMETER_ERROR uint16 = 0x0008 + QUICTransportErrorCode_CONNECTION_ID_LIMIT_ERROR uint16 = 0x0009 + QUICTransportErrorCode_PROTOCOL_VIOLATION uint16 = 0x000A + QUICTransportErrorCode_INVALID_TOKEN uint16 = 0x000B + QUICTransportErrorCode_APPLICATION_ERROR uint16 = 0x000C + QUICTransportErrorCode_CRYPTO_BUFFER_EXCEEDED uint16 = 0x000D + QUICTransportErrorCode_KEY_UPDATE_ERROR uint16 = 0x000E + QUICTransportErrorCode_AEAD_LIMIT_REACHED uint16 = 0x000F + QUICTransportErrorCode_NO_VIABLE_PATH uint16 = 0x0010 + QUICTransportErrorCode_VERSION_NEGOTIATION_ERROR uint16 = 0x0011 // RFC9368 + QUICTransportErrorCode_CRYPTO_ERROR uint16 = 0x0100 // 0x0100-0x01FF, use with bitwise operator +) + +var DictQUICTransportErrorCodeValueIndexed = map[uint16]string{ + 0x0000: "NO_ERROR", + 0x0001: "INTERNAL_ERROR", + 0x0002: "CONNECTION_REFUSED", + 0x0003: "FLOW_CONTROL_ERROR", + 0x0004: "STREAM_LIMIT_ERROR", + 0x0005: "STREAM_STATE_ERROR", + 0x0006: "FINAL_SIZE_ERROR", + 0x0007: "FRAME_ENCODING_ERROR", + 0x0008: "TRANSPORT_PARAMETER_ERROR", + 0x0009: "CONNECTION_ID_LIMIT_ERROR", + 0x000A: "PROTOCOL_VIOLATION", + 0x000B: "INVALID_TOKEN", + 0x000C: "APPLICATION_ERROR", + 0x000D: "CRYPTO_BUFFER_EXCEEDED", + 0x000E: "KEY_UPDATE_ERROR", + 0x000F: "AEAD_LIMIT_REACHED", + 0x0010: "NO_VIABLE_PATH", + 0x0011: "VERSION_NEGOTIATION_ERROR", + 0x0100: "CRYPTO_ERROR", +} + +var DictQUICTransportErrorCodeNameIndexed = map[string]uint16{ + "NO_ERROR": 0x0000, + "INTERNAL_ERROR": 0x0001, + "CONNECTION_REFUSED": 0x0002, + "FLOW_CONTROL_ERROR": 0x0003, + "STREAM_LIMIT_ERROR": 0x0004, + "STREAM_STATE_ERROR": 0x0005, + "FINAL_SIZE_ERROR": 0x0006, + "FRAME_ENCODING_ERROR": 0x0007, + "TRANSPORT_PARAMETER_ERROR": 0x0008, + "CONNECTION_ID_LIMIT_ERROR": 0x0009, + "PROTOCOL_VIOLATION": 0x000A, + "INVALID_TOKEN": 0x000B, + "APPLICATION_ERROR": 0x000C, + "CRYPTO_BUFFER_EXCEEDED": 0x000D, + "KEY_UPDATE_ERROR": 0x000E, + "AEAD_LIMIT_REACHED": 0x000F, + "NO_VIABLE_PATH": 0x0010, + "VERSION_NEGOTIATION_ERROR": 0x0011, + "CRYPTO_ERROR": 0x0100, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/quic_transport_parameters.go b/backend/vendor/github.com/enetx/utls/dicttls/quic_transport_parameters.go new file mode 100644 index 0000000..66eb881 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/quic_transport_parameters.go @@ -0,0 +1,91 @@ +package dicttls + +// source: https://www.iana.org/assignments/quic/quic.xhtml#quic-transport +// last updated: July 2023 + +const ( + QUICTransportParameter_original_destination_connection_id uint64 = 0x00 + QUICTransportParameter_max_idle_timeout uint64 = 0x01 + QUICTransportParameter_stateless_reset_token uint64 = 0x02 + QUICTransportParameter_max_udp_payload_size uint64 = 0x03 + QUICTransportParameter_initial_max_data uint64 = 0x04 + QUICTransportParameter_initial_max_stream_data_bidi_local uint64 = 0x05 + QUICTransportParameter_initial_max_stream_data_bidi_remote uint64 = 0x06 + QUICTransportParameter_initial_max_stream_data_uni uint64 = 0x07 + QUICTransportParameter_initial_max_streams_bidi uint64 = 0x08 + QUICTransportParameter_initial_max_streams_uni uint64 = 0x09 + QUICTransportParameter_ack_delay_exponent uint64 = 0x0a + QUICTransportParameter_max_ack_delay uint64 = 0x0b + QUICTransportParameter_disable_active_migration uint64 = 0x0c + QUICTransportParameter_preferred_address uint64 = 0x0d + QUICTransportParameter_active_connection_id_limit uint64 = 0x0e + QUICTransportParameter_initial_source_connection_id uint64 = 0x0f + QUICTransportParameter_retry_source_connection_id uint64 = 0x10 + QUICTransportParameter_version_information uint64 = 0x11 // RFC9368 + QUICTransportParameter_max_datagram_frame_size uint64 = 0x20 // RFC9221 + QUICTransportParameter_discard uint64 = 0x173e // David_Schinazi: Receiver silently discards. https://github.com/quicwg/base-drafts/wiki/Quantum-Readiness-test + QUICTransportParameter_google_handshake_message uint64 = 0x26ab // Google: Used to carry Google internal handshake message + QUICTransportParameter_grease_quic_bit uint64 = 0x2ab2 // RFC9287 + QUICTransportParameter_initial_rtt uint64 = 0x3127 // Google: Initial RTT in microseconds + QUICTransportParameter_google_connection_options uint64 = 0x3128 // Google: Google connection options for experimentation + QUICTransportParameter_user_agent uint64 = 0x3129 // Google: User agent string (deprecated) + QUICTransportParameter_google_version uint64 = 0x4752 // Google: Google QUIC version downgrade prevention +) + +var DictQUICTransportParameterValueIndexed = map[uint64]string{ + 0x00: "original_destination_connection_id", + 0x01: "max_idle_timeout", + 0x02: "stateless_reset_token", + 0x03: "max_udp_payload_size", + 0x04: "initial_max_data", + 0x05: "initial_max_stream_data_bidi_local", + 0x06: "initial_max_stream_data_bidi_remote", + 0x07: "initial_max_stream_data_uni", + 0x08: "initial_max_streams_bidi", + 0x09: "initial_max_streams_uni", + 0x0a: "ack_delay_exponent", + 0x0b: "max_ack_delay", + 0x0c: "disable_active_migration", + 0x0d: "preferred_address", + 0x0e: "active_connection_id_limit", + 0x0f: "initial_source_connection_id", + 0x10: "retry_source_connection_id", + 0x11: "version_information", + 0x20: "max_datagram_frame_size", + 0x173e: "discard", + 0x26ab: "google handshake message", + 0x2ab2: "grease_quic_bit", + 0x3127: "initial_rtt", + 0x3128: "google_connection_options", + 0x3129: "user_agent", + 0x4752: "google_version", +} + +var DictQUICTransportParameterNameIndexed = map[string]uint64{ + "original_destination_connection_id": 0x00, + "max_idle_timeout": 0x01, + "stateless_reset_token": 0x02, + "max_udp_payload_size": 0x03, + "initial_max_data": 0x04, + "initial_max_stream_data_bidi_local": 0x05, + "initial_max_stream_data_bidi_remote": 0x06, + "initial_max_stream_data_uni": 0x07, + "initial_max_streams_bidi": 0x08, + "initial_max_streams_uni": 0x09, + "ack_delay_exponent": 0x0a, + "max_ack_delay": 0x0b, + "disable_active_migration": 0x0c, + "preferred_address": 0x0d, + "active_connection_id_limit": 0x0e, + "initial_source_connection_id": 0x0f, + "retry_source_connection_id": 0x10, + "version_information": 0x11, + "max_datagram_frame_size": 0x20, + "discard": 0x173e, + "google handshake message": 0x26ab, + "grease_quic_bit": 0x2ab2, + "initial_rtt": 0x3127, + "google_connection_options": 0x3128, + "user_agent": 0x3129, + "google_version": 0x4752, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/signaturealgorithm.go b/backend/vendor/github.com/enetx/utls/dicttls/signaturealgorithm.go new file mode 100644 index 0000000..65c40c4 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/signaturealgorithm.go @@ -0,0 +1,41 @@ +package dicttls + +// Note: values in this file was used in TLS 1.2's signature_algorithms extension +// in combination with the values in hashalgorithm.go. +// signature_algorithms extension in TLS 1.3 uses values in signaturescheme.go + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-16 +// last updated: March 2023 + +const ( + SigAlg_anonymous uint8 = 0 // deprecated in TLS 1.3 + SigAlg_rsa uint8 = 1 + SigAlg_dsa uint8 = 2 // deprecated in TLS 1.3 + SigAlg_ecdsa uint8 = 3 + SigAlg_ed25519 uint8 = 7 + SigAlg_ed448 uint8 = 8 + SigAlg_gostr34102012_256 uint8 = 64 // value changed in TLS 1.3, to 0x0709-0x070C + SigAlg_gostr34102012_512 uint8 = 65 // value changed in TLS 1.3, to 0x070D-0x070F +) + +var DictSignatureAlgorithmValueIndexed = map[uint8]string{ + 0: "anonymous", + 1: "rsa", + 2: "dsa", + 3: "ecdsa", + 7: "ed25519", + 8: "ed448", + 64: "gostr34102012_256", + 65: "gostr34102012_512", +} + +var DictSignatureAlgorithmNameIndexed = map[string]uint8{ + "anonymous": 0, + "rsa": 1, + "dsa": 2, + "ecdsa": 3, + "ed25519": 7, + "ed448": 8, + "gostr34102012_256": 64, + "gostr34102012_512": 65, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/signaturescheme.go b/backend/vendor/github.com/enetx/utls/dicttls/signaturescheme.go new file mode 100644 index 0000000..d0b9803 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/signaturescheme.go @@ -0,0 +1,116 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-signaturescheme.csv +// last updated: March 2023 + +const ( + SigScheme_rsa_pkcs1_sha1 uint16 = 0x0201 + SigScheme_ecdsa_sha1 uint16 = 0x0203 + SigScheme_rsa_pkcs1_sha256 uint16 = 0x0401 + SigScheme_ecdsa_secp256r1_sha256 uint16 = 0x0403 + SigScheme_rsa_pkcs1_sha256_legacy uint16 = 0x0420 + SigScheme_rsa_pkcs1_sha384 uint16 = 0x0501 + SigScheme_ecdsa_secp384r1_sha384 uint16 = 0x0503 + SigScheme_rsa_pkcs1_sha384_legacy uint16 = 0x0520 + SigScheme_rsa_pkcs1_sha512 uint16 = 0x0601 + SigScheme_ecdsa_secp521r1_sha512 uint16 = 0x0603 + SigScheme_rsa_pkcs1_sha512_legacy uint16 = 0x0620 + SigScheme_eccsi_sha256 uint16 = 0x0704 + SigScheme_iso_ibs1 uint16 = 0x0705 + SigScheme_iso_ibs2 uint16 = 0x0706 + SigScheme_iso_chinese_ibs uint16 = 0x0707 + SigScheme_sm2sig_sm3 uint16 = 0x0708 + SigScheme_gostr34102012_256a uint16 = 0x0709 + SigScheme_gostr34102012_256b uint16 = 0x070A + SigScheme_gostr34102012_256c uint16 = 0x070B + SigScheme_gostr34102012_256d uint16 = 0x070C + SigScheme_gostr34102012_512a uint16 = 0x070D + SigScheme_gostr34102012_512b uint16 = 0x070E + SigScheme_gostr34102012_512c uint16 = 0x070F + SigScheme_rsa_pss_rsae_sha256 uint16 = 0x0804 + SigScheme_rsa_pss_rsae_sha384 uint16 = 0x0805 + SigScheme_rsa_pss_rsae_sha512 uint16 = 0x0806 + SigScheme_ed25519 uint16 = 0x0807 + SigScheme_ed448 uint16 = 0x0808 + SigScheme_rsa_pss_pss_sha256 uint16 = 0x0809 + SigScheme_rsa_pss_pss_sha384 uint16 = 0x080A + SigScheme_rsa_pss_pss_sha512 uint16 = 0x080B + SigScheme_ecdsa_brainpoolP256r1tls13_sha256 uint16 = 0x081A + SigScheme_ecdsa_brainpoolP384r1tls13_sha384 uint16 = 0x081B + SigScheme_ecdsa_brainpoolP512r1tls13_sha512 uint16 = 0x081C +) + +var DictSignatureSchemeValueIndexed = map[uint16]string{ + 0x0201: "rsa_pkcs1_sha1", + 0x0203: "ecdsa_sha1", + 0x0401: "rsa_pkcs1_sha256", + 0x0403: "ecdsa_secp256r1_sha256", + 0x0420: "rsa_pkcs1_sha256_legacy", + 0x0501: "rsa_pkcs1_sha384", + 0x0503: "ecdsa_secp384r1_sha384", + 0x0520: "rsa_pkcs1_sha384_legacy", + 0x0601: "rsa_pkcs1_sha512", + 0x0603: "ecdsa_secp521r1_sha512", + 0x0620: "rsa_pkcs1_sha512_legacy", + 0x0704: "eccsi_sha256", + 0x0705: "iso_ibs1", + 0x0706: "iso_ibs2", + 0x0707: "iso_chinese_ibs", + 0x0708: "sm2sig_sm3", + 0x0709: "gostr34102012_256a", + 0x070A: "gostr34102012_256b", + 0x070B: "gostr34102012_256c", + 0x070C: "gostr34102012_256d", + 0x070D: "gostr34102012_512a", + 0x070E: "gostr34102012_512b", + 0x070F: "gostr34102012_512c", + 0x0804: "rsa_pss_rsae_sha256", + 0x0805: "rsa_pss_rsae_sha384", + 0x0806: "rsa_pss_rsae_sha512", + 0x0807: "ed25519", + 0x0808: "ed448", + 0x0809: "rsa_pss_pss_sha256", + 0x080A: "rsa_pss_pss_sha384", + 0x080B: "rsa_pss_pss_sha512", + 0x081A: "ecdsa_brainpoolP256r1tls13_sha256", + 0x081B: "ecdsa_brainpoolP384r1tls13_sha384", + 0x081C: "ecdsa_brainpoolP512r1tls13_sha512", +} + +var DictSignatureSchemeNameIndexed = map[string]uint16{ + "rsa_pkcs1_sha1": 0x0201, + "Reserved for backward compatibility": 0x0202, + "ecdsa_sha1": 0x0203, + "rsa_pkcs1_sha256": 0x0401, + "ecdsa_secp256r1_sha256": 0x0403, + "rsa_pkcs1_sha256_legacy": 0x0420, + "rsa_pkcs1_sha384": 0x0501, + "ecdsa_secp384r1_sha384": 0x0503, + "rsa_pkcs1_sha384_legacy": 0x0520, + "rsa_pkcs1_sha512": 0x0601, + "ecdsa_secp521r1_sha512": 0x0603, + "rsa_pkcs1_sha512_legacy": 0x0620, + "eccsi_sha256": 0x0704, + "iso_ibs1": 0x0705, + "iso_ibs2": 0x0706, + "iso_chinese_ibs": 0x0707, + "sm2sig_sm3": 0x0708, + "gostr34102012_256a": 0x0709, + "gostr34102012_256b": 0x070A, + "gostr34102012_256c": 0x070B, + "gostr34102012_256d": 0x070C, + "gostr34102012_512a": 0x070D, + "gostr34102012_512b": 0x070E, + "gostr34102012_512c": 0x070F, + "rsa_pss_rsae_sha256": 0x0804, + "rsa_pss_rsae_sha384": 0x0805, + "rsa_pss_rsae_sha512": 0x0806, + "ed25519": 0x0807, + "ed448": 0x0808, + "rsa_pss_pss_sha256": 0x0809, + "rsa_pss_pss_sha384": 0x080A, + "rsa_pss_pss_sha512": 0x080B, + "ecdsa_brainpoolP256r1tls13_sha256": 0x081A, + "ecdsa_brainpoolP384r1tls13_sha384": 0x081B, + "ecdsa_brainpoolP512r1tls13_sha512": 0x081C, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/supplemental_data_formats.go b/backend/vendor/github.com/enetx/utls/dicttls/supplemental_data_formats.go new file mode 100644 index 0000000..9dd7f17 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/supplemental_data_formats.go @@ -0,0 +1,19 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-12 +// last updated: March 2023 + +const ( + SupplementalDataType_user_mapping_data uint16 = 0 + SupplementalDataType_authz_data uint16 = 16386 +) + +var DictSupplementalDataFormatValueIndexed = map[uint16]string{ + 0: "user_mapping_data", + 16386: "authz_data", +} + +var DictSupplementalDataFormatNameIndexed = map[string]uint16{ + "user_mapping_data": 0, + "authz_data": 16386, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/supported_groups.go b/backend/vendor/github.com/enetx/utls/dicttls/supported_groups.go new file mode 100644 index 0000000..7c5cb54 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/supported_groups.go @@ -0,0 +1,157 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-8 +// last updated: March 2023 + +const ( + SupportedGroups_sect163k1 uint16 = 1 + SupportedGroups_sect163r1 uint16 = 2 + SupportedGroups_sect163r2 uint16 = 3 + SupportedGroups_sect193r1 uint16 = 4 + SupportedGroups_sect193r2 uint16 = 5 + SupportedGroups_sect233k1 uint16 = 6 + SupportedGroups_sect233r1 uint16 = 7 + SupportedGroups_sect239k1 uint16 = 8 + SupportedGroups_sect283k1 uint16 = 9 + SupportedGroups_sect283r1 uint16 = 10 + SupportedGroups_sect409k1 uint16 = 11 + SupportedGroups_sect409r1 uint16 = 12 + SupportedGroups_sect571k1 uint16 = 13 + SupportedGroups_sect571r1 uint16 = 14 + SupportedGroups_secp160k1 uint16 = 15 + SupportedGroups_secp160r1 uint16 = 16 + SupportedGroups_secp160r2 uint16 = 17 + SupportedGroups_secp192k1 uint16 = 18 + SupportedGroups_secp192r1 uint16 = 19 + SupportedGroups_secp224k1 uint16 = 20 + SupportedGroups_secp224r1 uint16 = 21 + SupportedGroups_secp256k1 uint16 = 22 + SupportedGroups_secp256r1 uint16 = 23 + SupportedGroups_secp384r1 uint16 = 24 + SupportedGroups_secp521r1 uint16 = 25 + SupportedGroups_brainpoolP256r1 uint16 = 26 + SupportedGroups_brainpoolP384r1 uint16 = 27 + SupportedGroups_brainpoolP512r1 uint16 = 28 + SupportedGroups_x25519 uint16 = 29 + SupportedGroups_x448 uint16 = 30 + SupportedGroups_brainpoolP256r1tls13 uint16 = 31 + SupportedGroups_brainpoolP384r1tls13 uint16 = 32 + SupportedGroups_brainpoolP512r1tls13 uint16 = 33 + SupportedGroups_GC256A uint16 = 34 + SupportedGroups_GC256B uint16 = 35 + SupportedGroups_GC256C uint16 = 36 + SupportedGroups_GC256D uint16 = 37 + SupportedGroups_GC512A uint16 = 38 + SupportedGroups_GC512B uint16 = 39 + SupportedGroups_GC512C uint16 = 40 + SupportedGroups_curveSM2 uint16 = 41 + SupportedGroups_ffdhe2048 uint16 = 256 + SupportedGroups_ffdhe3072 uint16 = 257 + SupportedGroups_ffdhe4096 uint16 = 258 + SupportedGroups_ffdhe6144 uint16 = 259 + SupportedGroups_ffdhe8192 uint16 = 260 + SupportedGroups_arbitrary_explicit_prime_curves uint16 = 65281 + SupportedGroups_arbitrary_explicit_char2_curves uint16 = 65282 +) + +var DictSupportedGroupsValueIndexed = map[uint16]string{ + 1: "sect163k1", + 2: "sect163r1", + 3: "sect163r2", + 4: "sect193r1", + 5: "sect193r2", + 6: "sect233k1", + 7: "sect233r1", + 8: "sect239k1", + 9: "sect283k1", + 10: "sect283r1", + 11: "sect409k1", + 12: "sect409r1", + 13: "sect571k1", + 14: "sect571r1", + 15: "secp160k1", + 16: "secp160r1", + 17: "secp160r2", + 18: "secp192k1", + 19: "secp192r1", + 20: "secp224k1", + 21: "secp224r1", + 22: "secp256k1", + 23: "secp256r1", + 24: "secp384r1", + 25: "secp521r1", + 26: "brainpoolP256r1", + 27: "brainpoolP384r1", + 28: "brainpoolP512r1", + 29: "x25519", + 30: "x448", + 31: "brainpoolP256r1tls13", + 32: "brainpoolP384r1tls13", + 33: "brainpoolP512r1tls13", + 34: "GC256A", + 35: "GC256B", + 36: "GC256C", + 37: "GC256D", + 38: "GC512A", + 39: "GC512B", + 40: "GC512C", + 41: "curveSM2", + 256: "ffdhe2048", + 257: "ffdhe3072", + 258: "ffdhe4096", + 259: "ffdhe6144", + 260: "ffdhe8192", + 65281: "arbitrary_explicit_prime_curves", + 65282: "arbitrary_explicit_char2_curves", +} + +var DictSupportedGroupsNameIndexed = map[string]uint16{ + "sect163k1": 1, + "sect163r1": 2, + "sect163r2": 3, + "sect193r1": 4, + "sect193r2": 5, + "sect233k1": 6, + "sect233r1": 7, + "sect239k1": 8, + "sect283k1": 9, + "sect283r1": 10, + "sect409k1": 11, + "sect409r1": 12, + "sect571k1": 13, + "sect571r1": 14, + "secp160k1": 15, + "secp160r1": 16, + "secp160r2": 17, + "secp192k1": 18, + "secp192r1": 19, + "secp224k1": 20, + "secp224r1": 21, + "secp256k1": 22, + "secp256r1": 23, + "secp384r1": 24, + "secp521r1": 25, + "brainpoolP256r1": 26, + "brainpoolP384r1": 27, + "brainpoolP512r1": 28, + "x25519": 29, + "x448": 30, + "brainpoolP256r1tls13": 31, + "brainpoolP384r1tls13": 32, + "brainpoolP512r1tls13": 33, + "GC256A": 34, + "GC256B": 35, + "GC256C": 36, + "GC256D": 37, + "GC512A": 38, + "GC512B": 39, + "GC512C": 40, + "curveSM2": 41, + "ffdhe2048": 256, + "ffdhe3072": 257, + "ffdhe4096": 258, + "ffdhe6144": 259, + "ffdhe8192": 260, + "arbitrary_explicit_prime_curves": 65281, + "arbitrary_explicit_char2_curves": 65282, +} diff --git a/backend/vendor/github.com/enetx/utls/dicttls/usermappingtype_values.go b/backend/vendor/github.com/enetx/utls/dicttls/usermappingtype_values.go new file mode 100644 index 0000000..a16d071 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/dicttls/usermappingtype_values.go @@ -0,0 +1,16 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-14 +// last updated: March 2023 + +const ( + UserMappingType_upn_domain_hint uint8 = 64 +) + +var DictUserMappingTypeValueIndexed = map[uint8]string{ + 64: "upn_domain_hint", +} + +var DictUserMappingTypeNameIndexed = map[string]uint8{ + "upn_domain_hint": 64, +} diff --git a/backend/vendor/github.com/enetx/utls/ech.go b/backend/vendor/github.com/enetx/utls/ech.go new file mode 100644 index 0000000..8caa86b --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/ech.go @@ -0,0 +1,646 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bytes" + "errors" + "fmt" + "slices" + "strings" + + "github.com/enetx/utls/internal/hpke" + + "golang.org/x/crypto/cryptobyte" +) + +// sortedSupportedAEADs is just a sorted version of hpke.SupportedAEADS. +// We need this so that when we insert them into ECHConfigs the ordering +// is stable. +var sortedSupportedAEADs []uint16 + +func init() { + for aeadID := range hpke.SupportedAEADs { + sortedSupportedAEADs = append(sortedSupportedAEADs, aeadID) + } + slices.Sort(sortedSupportedAEADs) +} + +type echCipher struct { + KDFID uint16 + AEADID uint16 +} + +type echExtension struct { + Type uint16 + Data []byte +} + +type echConfig struct { + raw []byte + + Version uint16 + Length uint16 + + ConfigID uint8 + KemID uint16 + PublicKey []byte + SymmetricCipherSuite []echCipher + + MaxNameLength uint8 + PublicName []byte + Extensions []echExtension +} + +var errMalformedECHConfig = errors.New("tls: malformed ECHConfigList") + +func parseECHConfig(enc []byte) (skip bool, ec echConfig, err error) { + s := cryptobyte.String(enc) + ec.raw = []byte(enc) + if !s.ReadUint16(&ec.Version) { + return false, echConfig{}, errMalformedECHConfig + } + if !s.ReadUint16(&ec.Length) { + return false, echConfig{}, errMalformedECHConfig + } + if len(ec.raw) < int(ec.Length)+4 { + return false, echConfig{}, errMalformedECHConfig + } + ec.raw = ec.raw[:ec.Length+4] + if ec.Version != extensionEncryptedClientHello { + s.Skip(int(ec.Length)) + return true, echConfig{}, nil + } + if !s.ReadUint8(&ec.ConfigID) { + return false, echConfig{}, errMalformedECHConfig + } + if !s.ReadUint16(&ec.KemID) { + return false, echConfig{}, errMalformedECHConfig + } + if !readUint16LengthPrefixed(&s, &ec.PublicKey) { + return false, echConfig{}, errMalformedECHConfig + } + var cipherSuites cryptobyte.String + if !s.ReadUint16LengthPrefixed(&cipherSuites) { + return false, echConfig{}, errMalformedECHConfig + } + for !cipherSuites.Empty() { + var c echCipher + if !cipherSuites.ReadUint16(&c.KDFID) { + return false, echConfig{}, errMalformedECHConfig + } + if !cipherSuites.ReadUint16(&c.AEADID) { + return false, echConfig{}, errMalformedECHConfig + } + ec.SymmetricCipherSuite = append(ec.SymmetricCipherSuite, c) + } + if !s.ReadUint8(&ec.MaxNameLength) { + return false, echConfig{}, errMalformedECHConfig + } + var publicName cryptobyte.String + if !s.ReadUint8LengthPrefixed(&publicName) { + return false, echConfig{}, errMalformedECHConfig + } + ec.PublicName = publicName + var extensions cryptobyte.String + if !s.ReadUint16LengthPrefixed(&extensions) { + return false, echConfig{}, errMalformedECHConfig + } + for !extensions.Empty() { + var e echExtension + if !extensions.ReadUint16(&e.Type) { + return false, echConfig{}, errMalformedECHConfig + } + if !extensions.ReadUint16LengthPrefixed((*cryptobyte.String)(&e.Data)) { + return false, echConfig{}, errMalformedECHConfig + } + ec.Extensions = append(ec.Extensions, e) + } + + return false, ec, nil +} + +// parseECHConfigList parses a draft-ietf-tls-esni-18 ECHConfigList, returning a +// slice of parsed ECHConfigs, in the same order they were parsed, or an error +// if the list is malformed. +func parseECHConfigList(data []byte) ([]echConfig, error) { + s := cryptobyte.String(data) + var length uint16 + if !s.ReadUint16(&length) { + return nil, errMalformedECHConfig + } + if length != uint16(len(data)-2) { + return nil, errMalformedECHConfig + } + var configs []echConfig + for len(s) > 0 { + if len(s) < 4 { + return nil, errors.New("tls: malformed ECHConfig") + } + configLen := uint16(s[2])<<8 | uint16(s[3]) + skip, ec, err := parseECHConfig(s) + if err != nil { + return nil, err + } + s = s[configLen+4:] + if !skip { + configs = append(configs, ec) + } + } + return configs, nil +} + +func pickECHConfig(list []echConfig) *echConfig { + for _, ec := range list { + if _, ok := hpke.SupportedKEMs[ec.KemID]; !ok { + continue + } + var validSCS bool + for _, cs := range ec.SymmetricCipherSuite { + if _, ok := hpke.SupportedAEADs[cs.AEADID]; !ok { + continue + } + if _, ok := hpke.SupportedKDFs[cs.KDFID]; !ok { + continue + } + validSCS = true + break + } + if !validSCS { + continue + } + if !validDNSName(string(ec.PublicName)) { + continue + } + var unsupportedExt bool + for _, ext := range ec.Extensions { + // If high order bit is set to 1 the extension is mandatory. + // Since we don't support any extensions, if we see a mandatory + // bit, we skip the config. + if ext.Type&uint16(1<<15) != 0 { + unsupportedExt = true + } + } + if unsupportedExt { + continue + } + return &ec + } + return nil +} + +func pickECHCipherSuite(suites []echCipher) (echCipher, error) { + for _, s := range suites { + // NOTE: all of the supported AEADs and KDFs are fine, rather than + // imposing some sort of preference here, we just pick the first valid + // suite. + if _, ok := hpke.SupportedAEADs[s.AEADID]; !ok { + continue + } + if _, ok := hpke.SupportedKDFs[s.KDFID]; !ok { + continue + } + return s, nil + } + return echCipher{}, errors.New("tls: no supported symmetric ciphersuites for ECH") +} + +// [uTLS SECTION BEGIN] +func encodeInnerClientHello(inner *clientHelloMsg, maxNameLength int) ([]byte, error) { + return encodeInnerClientHelloReorderOuterExts(inner, maxNameLength, nil) +} + +// [uTLS SECTION END] + +// func encodeInnerClientHello(inner *clientHelloMsg, maxNameLength int) ([]byte, error) { +func encodeInnerClientHelloReorderOuterExts(inner *clientHelloMsg, maxNameLength int, outerExts []uint16) ([]byte, error) { // uTLS + h, err := inner.marshalMsgReorderOuterExts(true, outerExts) + if err != nil { + return nil, err + } + h = h[4:] // strip four byte prefix + + var paddingLen int + if inner.serverName != "" { + paddingLen = max(0, maxNameLength-len(inner.serverName)) + } else { + paddingLen = maxNameLength + 9 + } + paddingLen = 31 - ((len(h) + paddingLen - 1) % 32) + + return append(h, make([]byte, paddingLen)...), nil +} + +func skipUint8LengthPrefixed(s *cryptobyte.String) bool { + var skip uint8 + if !s.ReadUint8(&skip) { + return false + } + return s.Skip(int(skip)) +} + +func skipUint16LengthPrefixed(s *cryptobyte.String) bool { + var skip uint16 + if !s.ReadUint16(&skip) { + return false + } + return s.Skip(int(skip)) +} + +type rawExtension struct { + extType uint16 + data []byte +} + +func extractRawExtensions(hello *clientHelloMsg) ([]rawExtension, error) { + s := cryptobyte.String(hello.original) + if !s.Skip(4+2+32) || // header, version, random + !skipUint8LengthPrefixed(&s) || // session ID + !skipUint16LengthPrefixed(&s) || // cipher suites + !skipUint8LengthPrefixed(&s) { // compression methods + return nil, errors.New("tls: malformed outer client hello") + } + var rawExtensions []rawExtension + var extensions cryptobyte.String + if !s.ReadUint16LengthPrefixed(&extensions) { + return nil, errors.New("tls: malformed outer client hello") + } + + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return nil, errors.New("tls: invalid inner client hello") + } + rawExtensions = append(rawExtensions, rawExtension{extension, extData}) + } + return rawExtensions, nil +} + +func decodeInnerClientHello(outer *clientHelloMsg, encoded []byte) (*clientHelloMsg, error) { + // Reconstructing the inner client hello from its encoded form is somewhat + // complicated. It is missing its header (message type and length), session + // ID, and the extensions may be compressed. Since we need to put the + // extensions back in the same order as they were in the raw outer hello, + // and since we don't store the raw extensions, or the order we parsed them + // in, we need to reparse the raw extensions from the outer hello in order + // to properly insert them into the inner hello. This _should_ result in raw + // bytes which match the hello as it was generated by the client. + innerReader := cryptobyte.String(encoded) + var versionAndRandom, sessionID, cipherSuites, compressionMethods []byte + var extensions cryptobyte.String + if !innerReader.ReadBytes(&versionAndRandom, 2+32) || + !readUint8LengthPrefixed(&innerReader, &sessionID) || + len(sessionID) != 0 || + !readUint16LengthPrefixed(&innerReader, &cipherSuites) || + !readUint8LengthPrefixed(&innerReader, &compressionMethods) || + !innerReader.ReadUint16LengthPrefixed(&extensions) { + return nil, errors.New("tls: invalid inner client hello") + } + + // The specification says we must verify that the trailing padding is all + // zeros. This is kind of weird for TLS messages, where we generally just + // throw away any trailing garbage. + for _, p := range innerReader { + if p != 0 { + return nil, errors.New("tls: invalid inner client hello") + } + } + + rawOuterExts, err := extractRawExtensions(outer) + if err != nil { + return nil, err + } + + recon := cryptobyte.NewBuilder(nil) + recon.AddUint8(typeClientHello) + recon.AddUint24LengthPrefixed(func(recon *cryptobyte.Builder) { + recon.AddBytes(versionAndRandom) + recon.AddUint8LengthPrefixed(func(recon *cryptobyte.Builder) { + recon.AddBytes(outer.sessionId) + }) + recon.AddUint16LengthPrefixed(func(recon *cryptobyte.Builder) { + recon.AddBytes(cipherSuites) + }) + recon.AddUint8LengthPrefixed(func(recon *cryptobyte.Builder) { + recon.AddBytes(compressionMethods) + }) + recon.AddUint16LengthPrefixed(func(recon *cryptobyte.Builder) { + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + recon.SetError(errors.New("tls: invalid inner client hello")) + return + } + if extension == extensionECHOuterExtensions { + if !extData.ReadUint8LengthPrefixed(&extData) { + recon.SetError(errors.New("tls: invalid inner client hello")) + return + } + var i int + for !extData.Empty() { + var extType uint16 + if !extData.ReadUint16(&extType) { + recon.SetError(errors.New("tls: invalid inner client hello")) + return + } + if extType == extensionEncryptedClientHello { + recon.SetError(errors.New("tls: invalid outer extensions")) + return + } + for ; i <= len(rawOuterExts); i++ { + if i == len(rawOuterExts) { + recon.SetError(errors.New("tls: invalid outer extensions")) + return + } + if rawOuterExts[i].extType == extType { + break + } + } + recon.AddUint16(rawOuterExts[i].extType) + recon.AddUint16LengthPrefixed(func(recon *cryptobyte.Builder) { + recon.AddBytes(rawOuterExts[i].data) + }) + } + } else { + recon.AddUint16(extension) + recon.AddUint16LengthPrefixed(func(recon *cryptobyte.Builder) { + recon.AddBytes(extData) + }) + } + } + }) + }) + + reconBytes, err := recon.Bytes() + if err != nil { + return nil, err + } + inner := &clientHelloMsg{} + if !inner.unmarshal(reconBytes) { + return nil, errors.New("tls: invalid reconstructed inner client hello") + } + + if !bytes.Equal(inner.encryptedClientHello, []byte{uint8(innerECHExt)}) { + return nil, errInvalidECHExt + } + + if len(inner.supportedVersions) != 1 || (len(inner.supportedVersions) >= 1 && inner.supportedVersions[0] != VersionTLS13) { + return nil, errors.New("tls: client sent encrypted_client_hello extension and offered incompatible versions") + } + + return inner, nil +} + +func decryptECHPayload(context *hpke.Receipient, hello, payload []byte) ([]byte, error) { + outerAAD := bytes.Replace(hello[4:], payload, make([]byte, len(payload)), 1) + return context.Open(outerAAD, payload) +} + +func generateOuterECHExt(id uint8, kdfID, aeadID uint16, encodedKey []byte, payload []byte) ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(0) // outer + b.AddUint16(kdfID) + b.AddUint16(aeadID) + b.AddUint8(id) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { b.AddBytes(encodedKey) }) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { b.AddBytes(payload) }) + return b.Bytes() +} + +func computeAndUpdateOuterECHExtension(outer, inner *clientHelloMsg, ech *echClientContext, useKey bool) error { + var encapKey []byte + if useKey { + encapKey = ech.encapsulatedKey + } + encodedInner, err := encodeInnerClientHello(inner, int(ech.config.MaxNameLength)) + if err != nil { + return err + } + // NOTE: the tag lengths for all of the supported AEADs are the same (16 + // bytes), so we have hardcoded it here. If we add support for another AEAD + // with a different tag length, we will need to change this. + encryptedLen := len(encodedInner) + 16 // AEAD tag length + outer.encryptedClientHello, err = generateOuterECHExt(ech.config.ConfigID, ech.kdfID, ech.aeadID, encapKey, make([]byte, encryptedLen)) + if err != nil { + return err + } + serializedOuter, err := outer.marshal() + if err != nil { + return err + } + serializedOuter = serializedOuter[4:] // strip the four byte prefix + encryptedInner, err := ech.hpkeContext.Seal(serializedOuter, encodedInner) + if err != nil { + return err + } + outer.encryptedClientHello, err = generateOuterECHExt(ech.config.ConfigID, ech.kdfID, ech.aeadID, encapKey, encryptedInner) + if err != nil { + return err + } + return nil +} + +// validDNSName is a rather rudimentary check for the validity of a DNS name. +// This is used to check if the public_name in a ECHConfig is valid when we are +// picking a config. This can be somewhat lax because even if we pick a +// valid-looking name, the DNS layer will later reject it anyway. +func validDNSName(name string) bool { + if len(name) > 253 { + return false + } + labels := strings.Split(name, ".") + if len(labels) <= 1 { + return false + } + for _, l := range labels { + labelLen := len(l) + if labelLen == 0 { + return false + } + for i, r := range l { + if r == '-' && (i == 0 || i == labelLen-1) { + return false + } + if (r < '0' || r > '9') && (r < 'a' || r > 'z') && (r < 'A' || r > 'Z') && r != '-' { + return false + } + } + } + return true +} + +// ECHRejectionError is the error type returned when ECH is rejected by a remote +// server. If the server offered a ECHConfigList to use for retries, the +// RetryConfigList field will contain this list. +// +// The client may treat an ECHRejectionError with an empty set of RetryConfigs +// as a secure signal from the server. +type ECHRejectionError struct { + RetryConfigList []byte +} + +func (e *ECHRejectionError) Error() string { + return "tls: server rejected ECH" +} + +var errMalformedECHExt = errors.New("tls: malformed encrypted_client_hello extension") +var errInvalidECHExt = errors.New("tls: client sent invalid encrypted_client_hello extension") + +type echExtType uint8 + +const ( + innerECHExt echExtType = 1 + outerECHExt echExtType = 0 +) + +func parseECHExt(ext []byte) (echType echExtType, cs echCipher, configID uint8, encap []byte, payload []byte, err error) { + data := make([]byte, len(ext)) + copy(data, ext) + s := cryptobyte.String(data) + var echInt uint8 + if !s.ReadUint8(&echInt) { + err = errMalformedECHExt + return + } + echType = echExtType(echInt) + if echType == innerECHExt { + if !s.Empty() { + err = errMalformedECHExt + return + } + return echType, cs, 0, nil, nil, nil + } + if echType != outerECHExt { + err = errInvalidECHExt + return + } + if !s.ReadUint16(&cs.KDFID) { + err = errMalformedECHExt + return + } + if !s.ReadUint16(&cs.AEADID) { + err = errMalformedECHExt + return + } + if !s.ReadUint8(&configID) { + err = errMalformedECHExt + return + } + if !readUint16LengthPrefixed(&s, &encap) { + err = errMalformedECHExt + return + } + if !readUint16LengthPrefixed(&s, &payload) { + err = errMalformedECHExt + return + } + + // NOTE: clone encap and payload so that mutating them does not mutate the + // raw extension bytes. + return echType, cs, configID, bytes.Clone(encap), bytes.Clone(payload), nil +} + +func marshalEncryptedClientHelloConfigList(configs []EncryptedClientHelloKey) ([]byte, error) { + builder := cryptobyte.NewBuilder(nil) + builder.AddUint16LengthPrefixed(func(builder *cryptobyte.Builder) { + for _, c := range configs { + builder.AddBytes(c.Config) + } + }) + return builder.Bytes() +} + +func (c *Conn) processECHClientHello(outer *clientHelloMsg) (*clientHelloMsg, *echServerContext, error) { + echType, echCiphersuite, configID, encap, payload, err := parseECHExt(outer.encryptedClientHello) + if err != nil { + if errors.Is(err, errInvalidECHExt) { + c.sendAlert(alertIllegalParameter) + } else { + c.sendAlert(alertDecodeError) + } + + return nil, nil, errInvalidECHExt + } + + if echType == innerECHExt { + return outer, &echServerContext{inner: true}, nil + } + + if len(c.config.EncryptedClientHelloKeys) == 0 { + return outer, nil, nil + } + + for _, echKey := range c.config.EncryptedClientHelloKeys { + skip, config, err := parseECHConfig(echKey.Config) + if err != nil || skip { + c.sendAlert(alertInternalError) + return nil, nil, fmt.Errorf("tls: invalid EncryptedClientHelloKeys Config: %s", err) + } + if skip { + continue + } + echPriv, err := hpke.ParseHPKEPrivateKey(config.KemID, echKey.PrivateKey) + if err != nil { + c.sendAlert(alertInternalError) + return nil, nil, fmt.Errorf("tls: invalid EncryptedClientHelloKeys PrivateKey: %s", err) + } + info := append([]byte("tls ech\x00"), echKey.Config...) + hpkeContext, err := hpke.SetupReceipient(hpke.DHKEM_X25519_HKDF_SHA256, echCiphersuite.KDFID, echCiphersuite.AEADID, echPriv, info, encap) + if err != nil { + // attempt next trial decryption + continue + } + + encodedInner, err := decryptECHPayload(hpkeContext, outer.original, payload) + if err != nil { + // attempt next trial decryption + continue + } + + // NOTE: we do not enforce that the sent server_name matches the ECH + // configs PublicName, since this is not particularly important, and + // the client already had to know what it was in order to properly + // encrypt the payload. This is only a MAY in the spec, so we're not + // doing anything revolutionary. + + echInner, err := decodeInnerClientHello(outer, encodedInner) + if err != nil { + c.sendAlert(alertIllegalParameter) + return nil, nil, errInvalidECHExt + } + + c.echAccepted = true + + return echInner, &echServerContext{ + hpkeContext: hpkeContext, + configID: configID, + ciphersuite: echCiphersuite, + }, nil + } + + return outer, nil, nil +} + +func buildRetryConfigList(keys []EncryptedClientHelloKey) ([]byte, error) { + var atLeastOneRetryConfig bool + var retryBuilder cryptobyte.Builder + retryBuilder.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + for _, c := range keys { + if !c.SendAsRetry { + continue + } + atLeastOneRetryConfig = true + b.AddBytes(c.Config) + } + }) + if !atLeastOneRetryConfig { + return nil, nil + } + return retryBuilder.Bytes() +} diff --git a/backend/vendor/github.com/enetx/utls/handshake_client.go b/backend/vendor/github.com/enetx/utls/handshake_client.go new file mode 100644 index 0000000..25114cf --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/handshake_client.go @@ -0,0 +1,1370 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bytes" + "context" + "crypto" + "crypto/ecdsa" + "crypto/ed25519" + "crypto/mlkem" + "crypto/rsa" + "crypto/subtle" + "crypto/x509" + "errors" + "fmt" + "hash" + "io" + "net" + "slices" + "strings" + "time" + + "github.com/enetx/utls/internal/byteorder" + "github.com/enetx/utls/internal/fips140tls" + "github.com/enetx/utls/internal/hpke" + "github.com/enetx/utls/internal/tls13" +) + +type clientHandshakeState struct { + c *Conn + ctx context.Context + serverHello *serverHelloMsg + hello *clientHelloMsg + suite *cipherSuite + finishedHash finishedHash + masterSecret []byte + session *SessionState // the session being resumed + ticket []byte // a fresh ticket received during this handshake + + uconn *UConn // [uTLS] +} + +var testingOnlyForceClientHelloSignatureAlgorithms []SignatureScheme + +func (c *Conn) makeClientHello() (*clientHelloMsg, *keySharePrivateKeys, *echClientContext, error) { + config := c.config + + // [UTLS SECTION START] + if len(config.ServerName) == 0 && !config.InsecureSkipVerify && len(config.InsecureServerNameToVerify) == 0 { + return nil, nil, nil, errors.New("tls: at least one of ServerName, InsecureSkipVerify or InsecureServerNameToVerify must be specified in the tls.Config") + } + // [UTLS SECTION END] + + nextProtosLength := 0 + for _, proto := range config.NextProtos { + if l := len(proto); l == 0 || l > 255 { + return nil, nil, nil, errors.New("tls: invalid NextProtos value") + } else { + nextProtosLength += 1 + l + } + } + if nextProtosLength > 0xffff { + return nil, nil, nil, errors.New("tls: NextProtos values too large") + } + + supportedVersions := config.supportedVersions(roleClient) + if len(supportedVersions) == 0 { + return nil, nil, nil, errors.New("tls: no supported versions satisfy MinVersion and MaxVersion") + } + maxVersion := config.maxSupportedVersion(roleClient) + + hello := &clientHelloMsg{ + vers: maxVersion, + compressionMethods: []uint8{compressionNone}, + random: make([]byte, 32), + extendedMasterSecret: true, + ocspStapling: true, + scts: true, + serverName: hostnameInSNI(config.ServerName), + supportedCurves: config.curvePreferences(maxVersion), + supportedPoints: []uint8{pointFormatUncompressed}, + secureRenegotiationSupported: true, + alpnProtocols: config.NextProtos, + supportedVersions: supportedVersions, + } + + // The version at the beginning of the ClientHello was capped at TLS 1.2 + // for compatibility reasons. The supported_versions extension is used + // to negotiate versions now. See RFC 8446, Section 4.2.1. + if hello.vers > VersionTLS12 { + hello.vers = VersionTLS12 + } + + if c.handshakes > 0 { + hello.secureRenegotiation = c.clientFinished[:] + } + + preferenceOrder := cipherSuitesPreferenceOrder + if !hasAESGCMHardwareSupport { + preferenceOrder = cipherSuitesPreferenceOrderNoAES + } + configCipherSuites := config.cipherSuites() + hello.cipherSuites = make([]uint16, 0, len(configCipherSuites)) + + for _, suiteId := range preferenceOrder { + suite := mutualCipherSuite(configCipherSuites, suiteId) + if suite == nil { + continue + } + // Don't advertise TLS 1.2-only cipher suites unless + // we're attempting TLS 1.2. + if maxVersion < VersionTLS12 && suite.flags&suiteTLS12 != 0 { + continue + } + hello.cipherSuites = append(hello.cipherSuites, suiteId) + } + + _, err := io.ReadFull(config.rand(), hello.random) + if err != nil { + return nil, nil, nil, errors.New("tls: short read from Rand: " + err.Error()) + } + + // A random session ID is used to detect when the server accepted a ticket + // and is resuming a session (see RFC 5077). In TLS 1.3, it's always set as + // a compatibility measure (see RFC 8446, Section 4.1.2). + // + // The session ID is not set for QUIC connections (see RFC 9001, Section 8.4). + if c.quic == nil { + hello.sessionId = make([]byte, 32) + if _, err := io.ReadFull(config.rand(), hello.sessionId); err != nil { + return nil, nil, nil, errors.New("tls: short read from Rand: " + err.Error()) + } + } + + if maxVersion >= VersionTLS12 { + hello.supportedSignatureAlgorithms = supportedSignatureAlgorithms() + } + if testingOnlyForceClientHelloSignatureAlgorithms != nil { + hello.supportedSignatureAlgorithms = testingOnlyForceClientHelloSignatureAlgorithms + } + + var keyShareKeys *keySharePrivateKeys + if hello.supportedVersions[0] == VersionTLS13 { + // Reset the list of ciphers when the client only supports TLS 1.3. + if len(hello.supportedVersions) == 1 { + hello.cipherSuites = nil + } + if fips140tls.Required() { + hello.cipherSuites = append(hello.cipherSuites, defaultCipherSuitesTLS13FIPS...) + } else if hasAESGCMHardwareSupport { + hello.cipherSuites = append(hello.cipherSuites, defaultCipherSuitesTLS13...) + } else { + hello.cipherSuites = append(hello.cipherSuites, defaultCipherSuitesTLS13NoAES...) + } + + if len(hello.supportedCurves) == 0 { + return nil, nil, nil, errors.New("tls: no supported elliptic curves for ECDHE") + } + curveID := hello.supportedCurves[0] + keyShareKeys = &keySharePrivateKeys{curveID: curveID} + // Note that if X25519MLKEM768 is supported, it will be first because + // the preference order is fixed. + if curveID == X25519MLKEM768 { + keyShareKeys.ecdhe, err = generateECDHEKey(config.rand(), X25519) + if err != nil { + return nil, nil, nil, err + } + seed := make([]byte, mlkem.SeedSize) + if _, err := io.ReadFull(config.rand(), seed); err != nil { + return nil, nil, nil, err + } + keyShareKeys.mlkem, err = mlkem.NewDecapsulationKey768(seed) + if err != nil { + return nil, nil, nil, err + } + mlkemEncapsulationKey := keyShareKeys.mlkem.EncapsulationKey().Bytes() + x25519EphemeralKey := keyShareKeys.ecdhe.PublicKey().Bytes() + hello.keyShares = []keyShare{ + {group: X25519MLKEM768, data: append(mlkemEncapsulationKey, x25519EphemeralKey...)}, + } + // If both X25519MLKEM768 and X25519 are supported, we send both key + // shares (as a fallback) and we reuse the same X25519 ephemeral + // key, as allowed by draft-ietf-tls-hybrid-design-09, Section 3.2. + if slices.Contains(hello.supportedCurves, X25519) { + hello.keyShares = append(hello.keyShares, keyShare{group: X25519, data: x25519EphemeralKey}) + } + } else { + if _, ok := curveForCurveID(curveID); !ok { + return nil, nil, nil, errors.New("tls: CurvePreferences includes unsupported curve") + } + keyShareKeys.ecdhe, err = generateECDHEKey(config.rand(), curveID) + if err != nil { + return nil, nil, nil, err + } + hello.keyShares = []keyShare{{group: curveID, data: keyShareKeys.ecdhe.PublicKey().Bytes()}} + } + } + + if c.quic != nil { + p, err := c.quicGetTransportParameters() + if err != nil { + return nil, nil, nil, err + } + if p == nil { + p = []byte{} + } + hello.quicTransportParameters = p + } + + var ech *echClientContext + if c.config.EncryptedClientHelloConfigList != nil { + if c.config.MinVersion != 0 && c.config.MinVersion < VersionTLS13 { + return nil, nil, nil, errors.New("tls: MinVersion must be >= VersionTLS13 if EncryptedClientHelloConfigList is populated") + } + if c.config.MaxVersion != 0 && c.config.MaxVersion <= VersionTLS12 { + return nil, nil, nil, errors.New("tls: MaxVersion must be >= VersionTLS13 if EncryptedClientHelloConfigList is populated") + } + echConfigs, err := parseECHConfigList(c.config.EncryptedClientHelloConfigList) + if err != nil { + return nil, nil, nil, err + } + echConfig := pickECHConfig(echConfigs) + if echConfig == nil { + return nil, nil, nil, errors.New("tls: EncryptedClientHelloConfigList contains no valid configs") + } + ech = &echClientContext{config: echConfig} + hello.encryptedClientHello = []byte{1} // indicate inner hello + // We need to explicitly set these 1.2 fields to nil, as we do not + // marshal them when encoding the inner hello, otherwise transcripts + // will later mismatch. + hello.supportedPoints = nil + hello.ticketSupported = false + hello.secureRenegotiationSupported = false + hello.extendedMasterSecret = false + + echPK, err := hpke.ParseHPKEPublicKey(ech.config.KemID, ech.config.PublicKey) + if err != nil { + return nil, nil, nil, err + } + suite, err := pickECHCipherSuite(ech.config.SymmetricCipherSuite) + if err != nil { + return nil, nil, nil, err + } + ech.kdfID, ech.aeadID = suite.KDFID, suite.AEADID + info := append([]byte("tls ech\x00"), ech.config.raw...) + ech.encapsulatedKey, ech.hpkeContext, err = hpke.SetupSender(ech.config.KemID, suite.KDFID, suite.AEADID, echPK, info) + if err != nil { + return nil, nil, nil, err + } + } + + return hello, keyShareKeys, ech, nil +} + +type echClientContext struct { + config *echConfig + hpkeContext *hpke.Sender + encapsulatedKey []byte + innerHello *clientHelloMsg + innerTranscript hash.Hash + kdfID uint16 + aeadID uint16 + echRejected bool + retryConfigs []byte +} + +func (c *Conn) clientHandshake(ctx context.Context) (err error) { + if c.config == nil { + c.config = defaultConfig() + } + + // This may be a renegotiation handshake, in which case some fields + // need to be reset. + c.didResume = false + + hello, keyShareKeys, ech, err := c.makeClientHello() + if err != nil { + return err + } + + session, earlySecret, binderKey, err := c.loadSession(hello) + if err != nil { + return err + } + if session != nil { + defer func() { + // If we got a handshake failure when resuming a session, throw away + // the session ticket. See RFC 5077, Section 3.2. + // + // RFC 8446 makes no mention of dropping tickets on failure, but it + // does require servers to abort on invalid binders, so we need to + // delete tickets to recover from a corrupted PSK. + if err != nil { + if cacheKey := c.clientSessionCacheKey(); cacheKey != "" { + c.config.ClientSessionCache.Put(cacheKey, nil) + } + } + }() + } + + if ech != nil { + // Split hello into inner and outer + ech.innerHello = hello.clone() + + // Overwrite the server name in the outer hello with the public facing + // name. + hello.serverName = string(ech.config.PublicName) + // Generate a new random for the outer hello. + hello.random = make([]byte, 32) + _, err = io.ReadFull(c.config.rand(), hello.random) + if err != nil { + return errors.New("tls: short read from Rand: " + err.Error()) + } + + // NOTE: we don't do PSK GREASE, in line with boringssl, it's meant to + // work around _possibly_ broken middleboxes, but there is little-to-no + // evidence that this is actually a problem. + + if err := computeAndUpdateOuterECHExtension(hello, ech.innerHello, ech, true); err != nil { + return err + } + } + + c.serverName = hello.serverName + + if _, err := c.writeHandshakeRecord(hello, nil); err != nil { + return err + } + + if hello.earlyData { + suite := cipherSuiteTLS13ByID(session.cipherSuite) + transcript := suite.hash.New() + if err := transcriptMsg(hello, transcript); err != nil { + return err + } + earlyTrafficSecret := earlySecret.ClientEarlyTrafficSecret(transcript) + c.quicSetWriteSecret(QUICEncryptionLevelEarly, suite.id, earlyTrafficSecret) + } + + // serverHelloMsg is not included in the transcript + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + + serverHello, ok := msg.(*serverHelloMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(serverHello, msg) + } + + if err := c.pickTLSVersion(serverHello); err != nil { + return err + } + + // If we are negotiating a protocol version that's lower than what we + // support, check for the server downgrade canaries. + // See RFC 8446, Section 4.1.3. + maxVers := c.config.maxSupportedVersion(roleClient) + tls12Downgrade := string(serverHello.random[24:]) == downgradeCanaryTLS12 + tls11Downgrade := string(serverHello.random[24:]) == downgradeCanaryTLS11 + if maxVers == VersionTLS13 && c.vers <= VersionTLS12 && (tls12Downgrade || tls11Downgrade) || + maxVers == VersionTLS12 && c.vers <= VersionTLS11 && tls11Downgrade { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: downgrade attempt detected, possibly due to a MitM attack or a broken middlebox") + } + + if c.vers == VersionTLS13 { + hs := &clientHandshakeStateTLS13{ + c: c, + ctx: ctx, + serverHello: serverHello, + hello: hello, + keyShareKeys: keyShareKeys, + session: session, + earlySecret: earlySecret, + binderKey: binderKey, + echContext: ech, + } + return hs.handshake() + } + + hs := &clientHandshakeState{ + c: c, + ctx: ctx, + serverHello: serverHello, + hello: hello, + session: session, + } + return hs.handshake() +} + +func (c *Conn) loadSession(hello *clientHelloMsg) ( + session *SessionState, earlySecret *tls13.EarlySecret, binderKey []byte, err error) { + // [UTLS SECTION START] + if c.utls.sessionController != nil { + c.utls.sessionController.onEnterLoadSessionCheck() + defer c.utls.sessionController.onLoadSessionReturn() + } + // [UTLS SECTION END] + if c.config.SessionTicketsDisabled || c.config.ClientSessionCache == nil { + return nil, nil, nil, nil + } + + echInner := bytes.Equal(hello.encryptedClientHello, []byte{1}) + + // ticketSupported is a TLS 1.2 extension (as TLS 1.3 replaced tickets with PSK + // identities) and ECH requires and forces TLS 1.3. + hello.ticketSupported = true && !echInner + + if hello.supportedVersions[0] == VersionTLS13 { + // Require DHE on resumption as it guarantees forward secrecy against + // compromise of the session ticket key. See RFC 8446, Section 4.2.9. + hello.pskModes = []uint8{pskModeDHE} + } + + // Session resumption is not allowed if renegotiating because + // renegotiation is primarily used to allow a client to send a client + // certificate, which would be skipped if session resumption occurred. + if c.handshakes != 0 { + return nil, nil, nil, nil + } + + // Try to resume a previously negotiated TLS session, if available. + cacheKey := c.clientSessionCacheKey() + if cacheKey == "" { + return nil, nil, nil, nil + } + cs, ok := c.config.ClientSessionCache.Get(cacheKey) + if !ok || cs == nil { + return nil, nil, nil, nil + } + session = cs.session + + // Check that version used for the previous session is still valid. + versOk := false + for _, v := range hello.supportedVersions { + if v == session.version { + versOk = true + break + } + } + if !versOk { + return nil, nil, nil, nil + } + + // Check that the cached server certificate is not expired, and that it's + // valid for the ServerName. This should be ensured by the cache key, but + // protect the application from a faulty ClientSessionCache implementation. + // [UTLS SECTION START] + if !c.config.InsecureSkipTimeVerify { + if c.config.time().After(session.peerCertificates[0].NotAfter) { + // Expired certificate, delete the entry. + c.config.ClientSessionCache.Put(cacheKey, nil) + return nil, nil, nil, nil + } + } + // [UTLS SECTION END] + if !c.config.InsecureSkipVerify { + if len(session.verifiedChains) == 0 { + // The original connection had InsecureSkipVerify, while this doesn't. + return nil, nil, nil, nil + } + // [UTLS SECTION START] + var dnsName string + if len(c.config.InsecureServerNameToVerify) == 0 { + dnsName = c.config.ServerName + } else if c.config.InsecureServerNameToVerify != "*" { + dnsName = c.config.InsecureServerNameToVerify + } + if len(dnsName) > 0 { + if err := session.peerCertificates[0].VerifyHostname(dnsName); err != nil { + return nil, nil, nil, nil + } + } + // [UTLS SECTION END] + } + + if session.version != VersionTLS13 { + // In TLS 1.2 the cipher suite must match the resumed session. Ensure we + // are still offering it. + if mutualCipherSuite(hello.cipherSuites, session.cipherSuite) == nil { + return nil, nil, nil, nil + } + + hello.sessionTicket = session.ticket + return + } + + // Check that the session ticket is not expired. + if c.config.time().After(time.Unix(int64(session.useBy), 0)) { + c.config.ClientSessionCache.Put(cacheKey, nil) + return nil, nil, nil, nil + } + + // In TLS 1.3 the KDF hash must match the resumed session. Ensure we + // offer at least one cipher suite with that hash. + cipherSuite := cipherSuiteTLS13ByID(session.cipherSuite) + if cipherSuite == nil { + return nil, nil, nil, nil + } + cipherSuiteOk := false + for _, offeredID := range hello.cipherSuites { + offeredSuite := cipherSuiteTLS13ByID(offeredID) + if offeredSuite != nil && offeredSuite.hash == cipherSuite.hash { + cipherSuiteOk = true + break + } + } + if !cipherSuiteOk { + return nil, nil, nil, nil + } + + if c.quic != nil { + if c.quic.enableSessionEvents { + c.quicResumeSession(session) + } + + // For 0-RTT, the cipher suite has to match exactly, and we need to be + // offering the same ALPN. + if session.EarlyData && mutualCipherSuiteTLS13(hello.cipherSuites, session.cipherSuite) != nil { + for _, alpn := range hello.alpnProtocols { + if alpn == session.alpnProtocol { + hello.earlyData = true + break + } + } + } + } + + // Set the pre_shared_key extension. See RFC 8446, Section 4.2.11.1. + ticketAge := c.config.time().Sub(time.Unix(int64(session.createdAt), 0)) + identity := pskIdentity{ + label: session.ticket, + obfuscatedTicketAge: uint32(ticketAge/time.Millisecond) + session.ageAdd, + } + hello.pskIdentities = []pskIdentity{identity} + hello.pskBinders = [][]byte{make([]byte, cipherSuite.hash.Size())} + + // Compute the PSK binders. See RFC 8446, Section 4.2.11.2. + earlySecret = tls13.NewEarlySecret(cipherSuite.hash.New, session.secret) + binderKey = earlySecret.ResumptionBinderKey() + // [UTLS SECTION START] + if c.utls.sessionController != nil && !c.utls.sessionController.shouldLoadSessionWriteBinders() { + return + } + // [UTLS SECTION END] + transcript := cipherSuite.hash.New() + if err := computeAndUpdatePSK(hello, binderKey, transcript, cipherSuite.finishedHash); err != nil { + return nil, nil, nil, err + } + + return +} + +func (c *Conn) pickTLSVersion(serverHello *serverHelloMsg) error { + peerVersion := serverHello.vers + if serverHello.supportedVersion != 0 { + peerVersion = serverHello.supportedVersion + } + + vers, ok := c.config.mutualVersion(roleClient, []uint16{peerVersion}) + if !ok { + c.sendAlert(alertProtocolVersion) + return fmt.Errorf("tls: server selected unsupported protocol version %x", peerVersion) + } + + c.vers = vers + c.haveVers = true + c.in.version = vers + c.out.version = vers + + return nil +} + +// Does the handshake, either a full one or resumes old session. Requires hs.c, +// hs.hello, hs.serverHello, and, optionally, hs.session to be set. +func (hs *clientHandshakeState) handshake() error { + c := hs.c + + isResume, err := hs.processServerHello() + if err != nil { + return err + } + + hs.finishedHash = newFinishedHash(c.vers, hs.suite) + + // No signatures of the handshake are needed in a resumption. + // Otherwise, in a full handshake, if we don't have any certificates + // configured then we will never send a CertificateVerify message and + // thus no signatures are needed in that case either. + if isResume || (len(c.config.Certificates) == 0 && c.config.GetClientCertificate == nil) { + hs.finishedHash.discardHandshakeBuffer() + } + + if err := transcriptMsg(hs.hello, &hs.finishedHash); err != nil { + return err + } + if err := transcriptMsg(hs.serverHello, &hs.finishedHash); err != nil { + return err + } + + c.buffering = true + c.didResume = isResume + if isResume { + if err := hs.establishKeys(); err != nil { + return err + } + if err := hs.readSessionTicket(); err != nil { + return err + } + if err := hs.readFinished(c.serverFinished[:]); err != nil { + return err + } + c.clientFinishedIsFirst = false + // Make sure the connection is still being verified whether or not this + // is a resumption. Resumptions currently don't reverify certificates so + // they don't call verifyServerCertificate. See Issue 31641. + if c.config.VerifyConnection != nil { + if err := c.config.VerifyConnection(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + if err := hs.sendFinished(c.clientFinished[:]); err != nil { + return err + } + if _, err := c.flush(); err != nil { + return err + } + } else { + if err := hs.doFullHandshake(); err != nil { + return err + } + if err := hs.establishKeys(); err != nil { + return err + } + if err := hs.sendFinished(c.clientFinished[:]); err != nil { + return err + } + if _, err := c.flush(); err != nil { + return err + } + c.clientFinishedIsFirst = true + if err := hs.readSessionTicket(); err != nil { + return err + } + if err := hs.readFinished(c.serverFinished[:]); err != nil { + return err + } + } + if err := hs.saveSessionTicket(); err != nil { + return err + } + + c.ekm = ekmFromMasterSecret(c.vers, hs.suite, hs.masterSecret, hs.hello.random, hs.serverHello.random) + c.isHandshakeComplete.Store(true) + + return nil +} + +func (hs *clientHandshakeState) pickCipherSuite() error { + if hs.suite = mutualCipherSuite(hs.hello.cipherSuites, hs.serverHello.cipherSuite); hs.suite == nil { + hs.c.sendAlert(alertHandshakeFailure) + return errors.New("tls: server chose an unconfigured cipher suite") + } + + // [UTLS SECTION START] + // if hs.c.config.CipherSuites == nil && !fips140tls.Required() && rsaKexCiphers[hs.suite.id] { + // tlsrsakex.Value() // ensure godebug is initialized + // tlsrsakex.IncNonDefault() + // } + // if hs.c.config.CipherSuites == nil && !fips140tls.Required() && tdesCiphers[hs.suite.id] { + // tls3des.Value() // ensure godebug is initialized + // tls3des.IncNonDefault() + // } + // [UTLS SECTION END] + + hs.c.cipherSuite = hs.suite.id + return nil +} + +func (hs *clientHandshakeState) doFullHandshake() error { + c := hs.c + + msg, err := c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + certMsg, ok := msg.(*certificateMsg) + if !ok || len(certMsg.certificates) == 0 { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(certMsg, msg) + } + + msg, err = c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + + cs, ok := msg.(*certificateStatusMsg) + if ok { + // RFC4366 on Certificate Status Request: + // The server MAY return a "certificate_status" message. + + if !hs.serverHello.ocspStapling { + // If a server returns a "CertificateStatus" message, then the + // server MUST have included an extension of type "status_request" + // with empty "extension_data" in the extended server hello. + + c.sendAlert(alertUnexpectedMessage) + return errors.New("tls: received unexpected CertificateStatus message") + } + + c.ocspResponse = cs.response + + msg, err = c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + } + + if c.handshakes == 0 { + // If this is the first handshake on a connection, process and + // (optionally) verify the server's certificates. + if err := c.verifyServerCertificate(certMsg.certificates); err != nil { + return err + } + } else { + // This is a renegotiation handshake. We require that the + // server's identity (i.e. leaf certificate) is unchanged and + // thus any previous trust decision is still valid. + // + // See https://mitls.org/pages/attacks/3SHAKE for the + // motivation behind this requirement. + if !bytes.Equal(c.peerCertificates[0].Raw, certMsg.certificates[0]) { + c.sendAlert(alertBadCertificate) + return errors.New("tls: server's identity changed during renegotiation") + } + } + + keyAgreement := hs.suite.ka(c.vers) + + skx, ok := msg.(*serverKeyExchangeMsg) + if ok { + err = keyAgreement.processServerKeyExchange(c.config, hs.hello, hs.serverHello, c.peerCertificates[0], skx) + if err != nil { + c.sendAlert(alertIllegalParameter) + return err + } + if len(skx.key) >= 3 && skx.key[0] == 3 /* named curve */ { + c.curveID = CurveID(byteorder.BEUint16(skx.key[1:])) + } + + msg, err = c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + } + + var chainToSend *Certificate + var certRequested bool + certReq, ok := msg.(*certificateRequestMsg) + if ok { + certRequested = true + + cri := certificateRequestInfoFromMsg(hs.ctx, c.vers, certReq) + if chainToSend, err = c.getClientCertificate(cri); err != nil { + c.sendAlert(alertInternalError) + return err + } + + msg, err = c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + } + + shd, ok := msg.(*serverHelloDoneMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(shd, msg) + } + + // If the server requested a certificate then we have to send a + // Certificate message, even if it's empty because we don't have a + // certificate to send. + if certRequested { + certMsg = new(certificateMsg) + certMsg.certificates = chainToSend.Certificate + if _, err := hs.c.writeHandshakeRecord(certMsg, &hs.finishedHash); err != nil { + return err + } + } + + preMasterSecret, ckx, err := keyAgreement.generateClientKeyExchange(c.config, hs.hello, c.peerCertificates[0]) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + if ckx != nil { + if _, err := hs.c.writeHandshakeRecord(ckx, &hs.finishedHash); err != nil { + return err + } + } + + if hs.serverHello.extendedMasterSecret { + c.extMasterSecret = true + hs.masterSecret = extMasterFromPreMasterSecret(c.vers, hs.suite, preMasterSecret, + hs.finishedHash.Sum()) + } else { + hs.masterSecret = masterFromPreMasterSecret(c.vers, hs.suite, preMasterSecret, + hs.hello.random, hs.serverHello.random) + } + if err := c.config.writeKeyLog(keyLogLabelTLS12, hs.hello.random, hs.masterSecret); err != nil { + c.sendAlert(alertInternalError) + return errors.New("tls: failed to write to key log: " + err.Error()) + } + + if chainToSend != nil && len(chainToSend.Certificate) > 0 { + certVerify := &certificateVerifyMsg{} + + key, ok := chainToSend.PrivateKey.(crypto.Signer) + if !ok { + c.sendAlert(alertInternalError) + return fmt.Errorf("tls: client certificate private key of type %T does not implement crypto.Signer", chainToSend.PrivateKey) + } + + var sigType uint8 + var sigHash crypto.Hash + if c.vers >= VersionTLS12 { + signatureAlgorithm, err := selectSignatureScheme(c.vers, chainToSend, certReq.supportedSignatureAlgorithms) + if err != nil { + c.sendAlert(alertIllegalParameter) + return err + } + sigType, sigHash, err = typeAndHashFromSignatureScheme(signatureAlgorithm) + if err != nil { + return c.sendAlert(alertInternalError) + } + certVerify.hasSignatureAlgorithm = true + certVerify.signatureAlgorithm = signatureAlgorithm + } else { + sigType, sigHash, err = legacyTypeAndHashFromPublicKey(key.Public()) + if err != nil { + c.sendAlert(alertIllegalParameter) + return err + } + } + + signed := hs.finishedHash.hashForClientCertificate(sigType, sigHash) + signOpts := crypto.SignerOpts(sigHash) + if sigType == signatureRSAPSS { + signOpts = &rsa.PSSOptions{SaltLength: rsa.PSSSaltLengthEqualsHash, Hash: sigHash} + } + certVerify.signature, err = key.Sign(c.config.rand(), signed, signOpts) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + + if _, err := hs.c.writeHandshakeRecord(certVerify, &hs.finishedHash); err != nil { + return err + } + } + + hs.finishedHash.discardHandshakeBuffer() + + return nil +} + +func (hs *clientHandshakeState) establishKeys() error { + c := hs.c + + clientMAC, serverMAC, clientKey, serverKey, clientIV, serverIV := + keysFromMasterSecret(c.vers, hs.suite, hs.masterSecret, hs.hello.random, hs.serverHello.random, hs.suite.macLen, hs.suite.keyLen, hs.suite.ivLen) + var clientCipher, serverCipher any + var clientHash, serverHash hash.Hash + if hs.suite.cipher != nil { + clientCipher = hs.suite.cipher(clientKey, clientIV, false /* not for reading */) + clientHash = hs.suite.mac(clientMAC) + serverCipher = hs.suite.cipher(serverKey, serverIV, true /* for reading */) + serverHash = hs.suite.mac(serverMAC) + } else { + clientCipher = hs.suite.aead(clientKey, clientIV) + serverCipher = hs.suite.aead(serverKey, serverIV) + } + + c.in.prepareCipherSpec(c.vers, serverCipher, serverHash) + c.out.prepareCipherSpec(c.vers, clientCipher, clientHash) + return nil +} + +func (hs *clientHandshakeState) serverResumedSession() bool { + // If the server responded with the same sessionId then it means the + // sessionTicket is being used to resume a TLS session. + return hs.session != nil && hs.hello.sessionId != nil && + bytes.Equal(hs.serverHello.sessionId, hs.hello.sessionId) +} + +func (hs *clientHandshakeState) processServerHello() (bool, error) { + c := hs.c + + if err := hs.pickCipherSuite(); err != nil { + return false, err + } + + if hs.serverHello.compressionMethod != compressionNone { + c.sendAlert(alertUnexpectedMessage) + return false, errors.New("tls: server selected unsupported compression format") + } + + if c.handshakes == 0 && hs.serverHello.secureRenegotiationSupported { + c.secureRenegotiation = true + if len(hs.serverHello.secureRenegotiation) != 0 { + c.sendAlert(alertHandshakeFailure) + return false, errors.New("tls: initial handshake had non-empty renegotiation extension") + } + } + + if c.handshakes > 0 && c.secureRenegotiation { + var expectedSecureRenegotiation [24]byte + copy(expectedSecureRenegotiation[:], c.clientFinished[:]) + copy(expectedSecureRenegotiation[12:], c.serverFinished[:]) + if !bytes.Equal(hs.serverHello.secureRenegotiation, expectedSecureRenegotiation[:]) { + c.sendAlert(alertHandshakeFailure) + return false, errors.New("tls: incorrect renegotiation extension contents") + } + } + + if err := checkALPN(hs.hello.alpnProtocols, hs.serverHello.alpnProtocol, false); err != nil { + c.sendAlert(alertUnsupportedExtension) + return false, err + } + c.clientProtocol = hs.serverHello.alpnProtocol + + c.scts = hs.serverHello.scts + + if !hs.serverResumedSession() { + return false, nil + } + + if hs.session.version != c.vers { + c.sendAlert(alertHandshakeFailure) + return false, errors.New("tls: server resumed a session with a different version") + } + + if hs.session.cipherSuite != hs.suite.id { + c.sendAlert(alertHandshakeFailure) + return false, errors.New("tls: server resumed a session with a different cipher suite") + } + + // RFC 7627, Section 5.3 + if hs.session.extMasterSecret != hs.serverHello.extendedMasterSecret { + c.sendAlert(alertHandshakeFailure) + return false, errors.New("tls: server resumed a session with a different EMS extension") + } + + // Restore master secret and certificates from previous state + hs.masterSecret = hs.session.secret + c.extMasterSecret = hs.session.extMasterSecret + c.peerCertificates = hs.session.peerCertificates + c.activeCertHandles = hs.c.activeCertHandles + c.verifiedChains = hs.session.verifiedChains + c.ocspResponse = hs.session.ocspResponse + // Let the ServerHello SCTs override the session SCTs from the original + // connection, if any are provided + if len(c.scts) == 0 && len(hs.session.scts) != 0 { + c.scts = hs.session.scts + } + + return true, nil +} + +// checkALPN ensure that the server's choice of ALPN protocol is compatible with +// the protocols that we advertised in the ClientHello. +func checkALPN(clientProtos []string, serverProto string, quic bool) error { + if serverProto == "" { + if quic && len(clientProtos) > 0 { + // RFC 9001, Section 8.1 + return errors.New("tls: server did not select an ALPN protocol") + } + return nil + } + if len(clientProtos) == 0 { + return errors.New("tls: server advertised unrequested ALPN extension") + } + for _, proto := range clientProtos { + if proto == serverProto { + return nil + } + } + return errors.New("tls: server selected unadvertised ALPN protocol") +} + +func (hs *clientHandshakeState) readFinished(out []byte) error { + c := hs.c + + if err := c.readChangeCipherSpec(); err != nil { + return err + } + + // finishedMsg is included in the transcript, but not until after we + // check the client version, since the state before this message was + // sent is used during verification. + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + serverFinished, ok := msg.(*finishedMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(serverFinished, msg) + } + + verify := hs.finishedHash.serverSum(hs.masterSecret) + if len(verify) != len(serverFinished.verifyData) || + subtle.ConstantTimeCompare(verify, serverFinished.verifyData) != 1 { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: server's Finished message was incorrect") + } + + if err := transcriptMsg(serverFinished, &hs.finishedHash); err != nil { + return err + } + + copy(out, verify) + return nil +} + +func (hs *clientHandshakeState) readSessionTicket() error { + if !hs.serverHello.ticketSupported { + return nil + } + c := hs.c + + if !hs.hello.ticketSupported { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server sent unrequested session ticket") + } + + msg, err := c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + sessionTicketMsg, ok := msg.(*newSessionTicketMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(sessionTicketMsg, msg) + } + + hs.ticket = sessionTicketMsg.ticket + return nil +} + +func (hs *clientHandshakeState) saveSessionTicket() error { + if hs.ticket == nil { + return nil + } + c := hs.c + + cacheKey := c.clientSessionCacheKey() + if cacheKey == "" { + return nil + } + + session := c.sessionState() + session.secret = hs.masterSecret + session.ticket = hs.ticket + + cs := &ClientSessionState{session: session} + // [UTLS BEGIN] + if c.config.ClientSessionCache != nil { // skip saving session if cache is nil + c.config.ClientSessionCache.Put(cacheKey, cs) + } + // [UTLS END] + return nil +} + +func (hs *clientHandshakeState) sendFinished(out []byte) error { + c := hs.c + + if err := c.writeChangeCipherRecord(); err != nil { + return err + } + + finished := new(finishedMsg) + finished.verifyData = hs.finishedHash.clientSum(hs.masterSecret) + if _, err := hs.c.writeHandshakeRecord(finished, &hs.finishedHash); err != nil { + return err + } + copy(out, finished.verifyData) + return nil +} + +// defaultMaxRSAKeySize is the maximum RSA key size in bits that we are willing +// to verify the signatures of during a TLS handshake. +const defaultMaxRSAKeySize = 8192 + +// var tlsmaxrsasize = godebug.New("tlsmaxrsasize") // [uTLS] unused + +func checkKeySize(n int) (max int, ok bool) { + // [uTLS SECTION START] + // Disable the unsupported godebug package + // if v := tlsmaxrsasize.Value(); v != "" { + // if max, err := strconv.Atoi(v); err == nil { + // if (n <= max) != (n <= defaultMaxRSAKeySize) { + // tlsmaxrsasize.IncNonDefault() + // } + // return max, n <= max + // } + // } + // [uTLS SECTION END] + return defaultMaxRSAKeySize, n <= defaultMaxRSAKeySize +} + +// verifyServerCertificate parses and verifies the provided chain, setting +// c.verifiedChains and c.peerCertificates or sending the appropriate alert. +func (c *Conn) verifyServerCertificate(certificates [][]byte) error { + activeHandles := make([]*activeCert, len(certificates)) + certs := make([]*x509.Certificate, len(certificates)) + for i, asn1Data := range certificates { + cert, err := globalCertCache.newCert(asn1Data) + if err != nil { + c.sendAlert(alertBadCertificate) + return errors.New("tls: failed to parse certificate from server: " + err.Error()) + } + if cert.cert.PublicKeyAlgorithm == x509.RSA { + n := cert.cert.PublicKey.(*rsa.PublicKey).N.BitLen() + if max, ok := checkKeySize(n); !ok { + c.sendAlert(alertBadCertificate) + return fmt.Errorf("tls: server sent certificate containing RSA key larger than %d bits", max) + } + } + activeHandles[i] = cert + certs[i] = cert.cert + } + + echRejected := c.config.EncryptedClientHelloConfigList != nil && !c.echAccepted + if echRejected { + if c.config.EncryptedClientHelloRejectionVerify != nil { + if err := c.config.EncryptedClientHelloRejectionVerify(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } else { + opts := x509.VerifyOptions{ + Roots: c.config.RootCAs, + CurrentTime: c.config.time(), + // DNSName: c.serverName, // [uTLS] + Intermediates: x509.NewCertPool(), + } + + // [UTLS SECTION START] + if c.config.InsecureSkipTimeVerify { + opts.CurrentTime = certs[0].NotAfter + } + + if len(c.config.InsecureServerNameToVerify) == 0 { + opts.DNSName = c.config.ServerName + } else if c.config.InsecureServerNameToVerify != "*" { + opts.DNSName = c.config.InsecureServerNameToVerify + } + // [UTLS SECTION END] + + for _, cert := range certs[1:] { + opts.Intermediates.AddCert(cert) + } + chains, err := certs[0].Verify(opts) + if err != nil { + c.sendAlert(alertBadCertificate) + return &CertificateVerificationError{UnverifiedCertificates: certs, Err: err} + } + + c.verifiedChains, err = fipsAllowedChains(chains) + if err != nil { + c.sendAlert(alertBadCertificate) + return &CertificateVerificationError{UnverifiedCertificates: certs, Err: err} + } + } + } else if !c.config.InsecureSkipVerify { + // [UTLS SECTION START] + opts := x509.VerifyOptions{ + Roots: c.config.RootCAs, + CurrentTime: c.config.time(), + // DNSName: c.serverName, // [uTLS] + Intermediates: x509.NewCertPool(), + } + + if c.config.InsecureSkipTimeVerify { + opts.CurrentTime = certs[0].NotAfter + } + + if len(c.config.InsecureServerNameToVerify) == 0 { + opts.DNSName = c.config.ServerName + } else if c.config.InsecureServerNameToVerify != "*" { + opts.DNSName = c.config.InsecureServerNameToVerify + } + // [UTLS SECTION END] + + for _, cert := range certs[1:] { + opts.Intermediates.AddCert(cert) + } + chains, err := certs[0].Verify(opts) + if err != nil { + c.sendAlert(alertBadCertificate) + return &CertificateVerificationError{UnverifiedCertificates: certs, Err: err} + } + + c.verifiedChains, err = fipsAllowedChains(chains) + if err != nil { + c.sendAlert(alertBadCertificate) + return &CertificateVerificationError{UnverifiedCertificates: certs, Err: err} + } + } + + switch certs[0].PublicKey.(type) { + case *rsa.PublicKey, *ecdsa.PublicKey, ed25519.PublicKey: + break + default: + c.sendAlert(alertUnsupportedCertificate) + return fmt.Errorf("tls: server's certificate contains an unsupported type of public key: %T", certs[0].PublicKey) + } + + c.activeCertHandles = activeHandles + c.peerCertificates = certs + + if c.config.VerifyPeerCertificate != nil && !echRejected { + if err := c.config.VerifyPeerCertificate(certificates, c.verifiedChains); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + + if c.config.VerifyConnection != nil && !echRejected { + if err := c.config.VerifyConnection(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + + return nil +} + +// certificateRequestInfoFromMsg generates a CertificateRequestInfo from a TLS +// <= 1.2 CertificateRequest, making an effort to fill in missing information. +func certificateRequestInfoFromMsg(ctx context.Context, vers uint16, certReq *certificateRequestMsg) *CertificateRequestInfo { + cri := &CertificateRequestInfo{ + AcceptableCAs: certReq.certificateAuthorities, + Version: vers, + ctx: ctx, + } + + var rsaAvail, ecAvail bool + for _, certType := range certReq.certificateTypes { + switch certType { + case certTypeRSASign: + rsaAvail = true + case certTypeECDSASign: + ecAvail = true + } + } + + if !certReq.hasSignatureAlgorithm { + // Prior to TLS 1.2, signature schemes did not exist. In this case we + // make up a list based on the acceptable certificate types, to help + // GetClientCertificate and SupportsCertificate select the right certificate. + // The hash part of the SignatureScheme is a lie here, because + // TLS 1.0 and 1.1 always use MD5+SHA1 for RSA and SHA1 for ECDSA. + switch { + case rsaAvail && ecAvail: + cri.SignatureSchemes = []SignatureScheme{ + ECDSAWithP256AndSHA256, ECDSAWithP384AndSHA384, ECDSAWithP521AndSHA512, + PKCS1WithSHA256, PKCS1WithSHA384, PKCS1WithSHA512, PKCS1WithSHA1, + } + case rsaAvail: + cri.SignatureSchemes = []SignatureScheme{ + PKCS1WithSHA256, PKCS1WithSHA384, PKCS1WithSHA512, PKCS1WithSHA1, + } + case ecAvail: + cri.SignatureSchemes = []SignatureScheme{ + ECDSAWithP256AndSHA256, ECDSAWithP384AndSHA384, ECDSAWithP521AndSHA512, + } + } + return cri + } + + // Filter the signature schemes based on the certificate types. + // See RFC 5246, Section 7.4.4 (where it calls this "somewhat complicated"). + cri.SignatureSchemes = make([]SignatureScheme, 0, len(certReq.supportedSignatureAlgorithms)) + for _, sigScheme := range certReq.supportedSignatureAlgorithms { + sigType, _, err := typeAndHashFromSignatureScheme(sigScheme) + if err != nil { + continue + } + switch sigType { + case signatureECDSA, signatureEd25519: + if ecAvail { + cri.SignatureSchemes = append(cri.SignatureSchemes, sigScheme) + } + case signatureRSAPSS, signaturePKCS1v15: + if rsaAvail { + cri.SignatureSchemes = append(cri.SignatureSchemes, sigScheme) + } + } + } + + return cri +} + +func (c *Conn) getClientCertificate(cri *CertificateRequestInfo) (*Certificate, error) { + if c.config.GetClientCertificate != nil { + return c.config.GetClientCertificate(cri) + } + + for _, chain := range c.config.Certificates { + if err := cri.SupportsCertificate(&chain); err != nil { + continue + } + return &chain, nil + } + + // No acceptable certificate found. Don't send a certificate. + return new(Certificate), nil +} + +// clientSessionCacheKey returns a key used to cache sessionTickets that could +// be used to resume previously negotiated TLS sessions with a server. +func (c *Conn) clientSessionCacheKey() string { + if len(c.config.ServerName) > 0 { + return c.config.ServerName + } + if c.conn != nil { + return c.conn.RemoteAddr().String() + } + return "" +} + +// hostnameInSNI converts name into an appropriate hostname for SNI. +// Literal IP addresses and absolute FQDNs are not permitted as SNI values. +// See RFC 6066, Section 3. +func hostnameInSNI(name string) string { + host := name + if len(host) > 0 && host[0] == '[' && host[len(host)-1] == ']' { + host = host[1 : len(host)-1] + } + if i := strings.LastIndex(host, "%"); i > 0 { + host = host[:i] + } + if net.ParseIP(host) != nil { + return "" + } + for len(name) > 0 && name[len(name)-1] == '.' { + name = name[:len(name)-1] + } + return name +} + +func computeAndUpdatePSK(m *clientHelloMsg, binderKey []byte, transcript hash.Hash, finishedHash func([]byte, hash.Hash) []byte) error { + helloBytes, err := m.marshalWithoutBinders() + if err != nil { + return err + } + transcript.Write(helloBytes) + pskBinders := [][]byte{finishedHash(binderKey, transcript)} + return m.updateBinders(pskBinders) +} diff --git a/backend/vendor/github.com/enetx/utls/handshake_client_tls13.go b/backend/vendor/github.com/enetx/utls/handshake_client_tls13.go new file mode 100644 index 0000000..81039ce --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/handshake_client_tls13.go @@ -0,0 +1,1079 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bytes" + "context" + "crypto" + "crypto/ecdh" + "crypto/hmac" + "crypto/mlkem" + "crypto/rsa" + "crypto/subtle" + "errors" + "fmt" + "hash" + "slices" + "time" + + "github.com/enetx/utls/internal/hkdf" + "github.com/enetx/utls/internal/tls13" +) + +type clientHandshakeStateTLS13 struct { + c *Conn + ctx context.Context + serverHello *serverHelloMsg + hello *clientHelloMsg + keyShareKeys *keySharePrivateKeys + + session *SessionState + earlySecret *tls13.EarlySecret + binderKey []byte + + certReq *certificateRequestMsgTLS13 + usingPSK bool + sentDummyCCS bool + suite *cipherSuiteTLS13 + transcript hash.Hash + masterSecret *tls13.MasterSecret + trafficSecret []byte // client_application_traffic_secret_0 + + echContext *echClientContext + + uconn *UConn // [uTLS] +} + +// handshake requires hs.c, hs.hello, hs.serverHello, hs.keyShareKeys, and, +// optionally, hs.session, hs.earlySecret and hs.binderKey to be set. +func (hs *clientHandshakeStateTLS13) handshake() error { + c := hs.c + + // The server must not select TLS 1.3 in a renegotiation. See RFC 8446, + // sections 4.1.2 and 4.1.3. + if c.handshakes > 0 { + c.sendAlert(alertProtocolVersion) + return errors.New("tls: server selected TLS 1.3 in a renegotiation") + } + + // Consistency check on the presence of a keyShare and its parameters. + if hs.keyShareKeys == nil || hs.keyShareKeys.ecdhe == nil || len(hs.hello.keyShares) == 0 { + return c.sendAlert(alertInternalError) + } + + if err := hs.checkServerHelloOrHRR(); err != nil { + return err + } + + hs.transcript = hs.suite.hash.New() + + if err := transcriptMsg(hs.hello, hs.transcript); err != nil { + return err + } + + if hs.echContext != nil { + hs.echContext.innerTranscript = hs.suite.hash.New() + // [uTLS SECTION BEGIN] + if hs.uconn != nil && hs.uconn.clientHelloBuildStatus == BuildByUtls { + if err := hs.uconn.echTranscriptMsg(hs.hello, hs.echContext); err != nil { + return err + } + } else { + if err := transcriptMsg(hs.echContext.innerHello, hs.echContext.innerTranscript); err != nil { + return err + } + } + // [uTLS SECTION END] + } + + if bytes.Equal(hs.serverHello.random, helloRetryRequestRandom) { + if err := hs.sendDummyChangeCipherSpec(); err != nil { + return err + } + if err := hs.processHelloRetryRequest(); err != nil { + return err + } + } + + if hs.echContext != nil { + confTranscript := cloneHash(hs.echContext.innerTranscript, hs.suite.hash) + confTranscript.Write(hs.serverHello.original[:30]) + confTranscript.Write(make([]byte, 8)) + confTranscript.Write(hs.serverHello.original[38:]) + acceptConfirmation := tls13.ExpandLabel(hs.suite.hash.New, + hkdf.Extract(hs.suite.hash.New, hs.echContext.innerHello.random, nil), + "ech accept confirmation", + confTranscript.Sum(nil), + 8, + ) + if subtle.ConstantTimeCompare(acceptConfirmation, hs.serverHello.random[len(hs.serverHello.random)-8:]) == 1 { + hs.hello = hs.echContext.innerHello + c.serverName = c.config.ServerName + hs.transcript = hs.echContext.innerTranscript + c.echAccepted = true + + if hs.serverHello.encryptedClientHello != nil { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: unexpected encrypted client hello extension in server hello despite ECH being accepted") + } + + if hs.hello.serverName == "" && hs.serverHello.serverNameAck { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: unexpected server_name extension in server hello") + } + } else { + hs.echContext.echRejected = true + } + } + + if err := transcriptMsg(hs.serverHello, hs.transcript); err != nil { + return err + } + + c.buffering = true + if err := hs.processServerHello(); err != nil { + return err + } + if err := hs.sendDummyChangeCipherSpec(); err != nil { + return err + } + if err := hs.establishHandshakeKeys(); err != nil { + return err + } + if err := hs.readServerParameters(); err != nil { + return err + } + if err := hs.readServerCertificate(); err != nil { + return err + } + if err := hs.readServerFinished(); err != nil { + return err + } + // [UTLS SECTION START] + if err := hs.serverFinishedReceived(); err != nil { + return err + } + // [UTLS SECTION END] + if err := hs.sendClientCertificate(); err != nil { + return err + } + if err := hs.sendClientFinished(); err != nil { + return err + } + if _, err := c.flush(); err != nil { + return err + } + + if hs.echContext != nil && hs.echContext.echRejected { + c.sendAlert(alertECHRequired) + return &ECHRejectionError{hs.echContext.retryConfigs} + } + + c.isHandshakeComplete.Store(true) + + return nil +} + +// checkServerHelloOrHRR does validity checks that apply to both ServerHello and +// HelloRetryRequest messages. It sets hs.suite. +func (hs *clientHandshakeStateTLS13) checkServerHelloOrHRR() error { + c := hs.c + + if hs.serverHello.supportedVersion == 0 { + c.sendAlert(alertMissingExtension) + return errors.New("tls: server selected TLS 1.3 using the legacy version field") + } + + if hs.serverHello.supportedVersion != VersionTLS13 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server selected an invalid version after a HelloRetryRequest") + } + + if hs.serverHello.vers != VersionTLS12 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server sent an incorrect legacy version") + } + + if hs.serverHello.ocspStapling || + hs.serverHello.ticketSupported || + hs.serverHello.extendedMasterSecret || + hs.serverHello.secureRenegotiationSupported || + len(hs.serverHello.secureRenegotiation) != 0 || + len(hs.serverHello.alpnProtocol) != 0 || + len(hs.serverHello.scts) != 0 { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: server sent a ServerHello extension forbidden in TLS 1.3") + } + + if !bytes.Equal(hs.hello.sessionId, hs.serverHello.sessionId) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server did not echo the legacy session ID") + } + + if hs.serverHello.compressionMethod != compressionNone { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server selected unsupported compression format") + } + + selectedSuite := mutualCipherSuiteTLS13(hs.hello.cipherSuites, hs.serverHello.cipherSuite) + if hs.suite != nil && selectedSuite != hs.suite { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server changed cipher suite after a HelloRetryRequest") + } + if selectedSuite == nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server chose an unconfigured cipher suite") + } + hs.suite = selectedSuite + c.cipherSuite = hs.suite.id + + return nil +} + +// sendDummyChangeCipherSpec sends a ChangeCipherSpec record for compatibility +// with middleboxes that didn't implement TLS correctly. See RFC 8446, Appendix D.4. +func (hs *clientHandshakeStateTLS13) sendDummyChangeCipherSpec() error { + if hs.c.quic != nil { + return nil + } + if hs.sentDummyCCS { + return nil + } + hs.sentDummyCCS = true + + return hs.c.writeChangeCipherRecord() +} + +// processHelloRetryRequest handles the HRR in hs.serverHello, modifies and +// resends hs.hello, and reads the new ServerHello into hs.serverHello. +func (hs *clientHandshakeStateTLS13) processHelloRetryRequest() error { + c := hs.c + + // The first ClientHello gets double-hashed into the transcript upon a + // HelloRetryRequest. (The idea is that the server might offload transcript + // storage to the client in the cookie.) See RFC 8446, Section 4.4.1. + chHash := hs.transcript.Sum(nil) + hs.transcript.Reset() + hs.transcript.Write([]byte{typeMessageHash, 0, 0, uint8(len(chHash))}) + hs.transcript.Write(chHash) + if err := transcriptMsg(hs.serverHello, hs.transcript); err != nil { + return err + } + + var isInnerHello bool + hello := hs.hello + if hs.echContext != nil { + chHash = hs.echContext.innerTranscript.Sum(nil) + hs.echContext.innerTranscript.Reset() + hs.echContext.innerTranscript.Write([]byte{typeMessageHash, 0, 0, uint8(len(chHash))}) + hs.echContext.innerTranscript.Write(chHash) + + if hs.serverHello.encryptedClientHello != nil { + if len(hs.serverHello.encryptedClientHello) != 8 { + hs.c.sendAlert(alertDecodeError) + return errors.New("tls: malformed encrypted client hello extension") + } + + confTranscript := cloneHash(hs.echContext.innerTranscript, hs.suite.hash) + hrrHello := make([]byte, len(hs.serverHello.original)) + copy(hrrHello, hs.serverHello.original) + hrrHello = bytes.Replace(hrrHello, hs.serverHello.encryptedClientHello, make([]byte, 8), 1) + confTranscript.Write(hrrHello) + acceptConfirmation := tls13.ExpandLabel(hs.suite.hash.New, + hkdf.Extract(hs.suite.hash.New, hs.echContext.innerHello.random, nil), + "hrr ech accept confirmation", + confTranscript.Sum(nil), + 8, + ) + if subtle.ConstantTimeCompare(acceptConfirmation, hs.serverHello.encryptedClientHello) == 1 { + hello = hs.echContext.innerHello + c.serverName = c.config.ServerName + isInnerHello = true + c.echAccepted = true + } + } + + if err := transcriptMsg(hs.serverHello, hs.echContext.innerTranscript); err != nil { + return err + } + } else if hs.serverHello.encryptedClientHello != nil { + // Unsolicited ECH extension should be rejected + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: unexpected encrypted client hello extension in serverHello") + } + + // The only HelloRetryRequest extensions we support are key_share and + // cookie, and clients must abort the handshake if the HRR would not result + // in any change in the ClientHello. + if hs.serverHello.selectedGroup == 0 && hs.serverHello.cookie == nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server sent an unnecessary HelloRetryRequest message") + } + + if hs.serverHello.cookie != nil { + hello.cookie = hs.serverHello.cookie + } + + if hs.serverHello.serverShare.group != 0 { + c.sendAlert(alertDecodeError) + return errors.New("tls: received malformed key_share extension") + } + + // If the server sent a key_share extension selecting a group, ensure it's + // a group we advertised but did not send a key share for, and send a key + // share for it this time. + if curveID := hs.serverHello.selectedGroup; curveID != 0 { + if !slices.Contains(hello.supportedCurves, curveID) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server selected unsupported group") + } + if slices.ContainsFunc(hs.hello.keyShares, func(ks keyShare) bool { + return ks.group == curveID + }) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server sent an unnecessary HelloRetryRequest key_share") + } + // Note: we don't support selecting X25519MLKEM768 in a HRR, because it + // is currently first in preference order, so if it's enabled we'll + // always send a key share for it. + // + // This will have to change once we support multiple hybrid KEMs. + if _, ok := curveForCurveID(curveID); !ok { + c.sendAlert(alertInternalError) + return errors.New("tls: CurvePreferences includes unsupported curve") + } + key, err := generateECDHEKey(c.config.rand(), curveID) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + hs.keyShareKeys = &keySharePrivateKeys{curveID: curveID, ecdhe: key} + hello.keyShares = []keyShare{{group: curveID, data: key.PublicKey().Bytes()}} + } + + if len(hello.pskIdentities) > 0 { + pskSuite := cipherSuiteTLS13ByID(hs.session.cipherSuite) + if pskSuite == nil { + return c.sendAlert(alertInternalError) + } + if pskSuite.hash == hs.suite.hash { + // Update binders and obfuscated_ticket_age. + ticketAge := c.config.time().Sub(time.Unix(int64(hs.session.createdAt), 0)) + hello.pskIdentities[0].obfuscatedTicketAge = uint32(ticketAge/time.Millisecond) + hs.session.ageAdd + + transcript := hs.suite.hash.New() + transcript.Write([]byte{typeMessageHash, 0, 0, uint8(len(chHash))}) + transcript.Write(chHash) + if err := transcriptMsg(hs.serverHello, transcript); err != nil { + return err + } + + if err := computeAndUpdatePSK(hello, hs.binderKey, transcript, hs.suite.finishedHash); err != nil { + return err + } + } else { + // Server selected a cipher suite incompatible with the PSK. + hello.pskIdentities = nil + hello.pskBinders = nil + } + } + + // [uTLS SECTION BEGINS] + // crypto/tls code above this point had changed crypto/tls structures in accordance with HRR, and is about + // to call default marshaller. + // Instead, we fill uTLS-specific structs and call uTLS marshaller. + // Only extensionCookie, extensionPreSharedKey, extensionKeyShare, extensionEarlyData, extensionSupportedVersions, + // and utlsExtensionPadding are supposed to change + if hs.uconn != nil { + if hs.uconn.ClientHelloID != HelloGolang { + if len(hs.hello.pskIdentities) > 0 { + // TODO: wait for someone who cares about PSK to implement + return errors.New("uTLS does not support reprocessing of PSK key triggered by HelloRetryRequest") + } + + keyShareExtFound := false + for _, ext := range hs.uconn.Extensions { + // new ks seems to be generated either way + if ks, ok := ext.(*KeyShareExtension); ok { + ks.KeyShares = keyShares(hs.hello.keyShares).ToPublic() + keyShareExtFound = true + } + } + if !keyShareExtFound { + return errors.New("uTLS: received HelloRetryRequest, but keyshare not found among client's " + + "uconn.Extensions") + } + + if len(hs.serverHello.cookie) > 0 { + // serverHello specified a cookie, let's echo it + cookieFound := false + for _, ext := range hs.uconn.Extensions { + if ks, ok := ext.(*CookieExtension); ok { + ks.Cookie = hs.serverHello.cookie + cookieFound = true + } + } + + if !cookieFound { + // pick a random index where to add cookieExtension + // -2 instead of -1 is a lazy way to ensure that PSK is still a last extension + p, err := newPRNG() + if err != nil { + return err + } + cookieIndex := p.Intn(len(hs.uconn.Extensions) - 2) + if cookieIndex >= len(hs.uconn.Extensions) { + // this check is for empty hs.uconn.Extensions + return fmt.Errorf("cookieIndex >= len(hs.uconn.Extensions): %v >= %v", + cookieIndex, len(hs.uconn.Extensions)) + } + hs.uconn.Extensions = append(hs.uconn.Extensions[:cookieIndex], + append([]TLSExtension{&CookieExtension{Cookie: hs.serverHello.cookie}}, + hs.uconn.Extensions[cookieIndex:]...)...) + } + } + if err := hs.uconn.MarshalClientHelloNoECH(); err != nil { + return err + } + hs.hello.original = hs.uconn.HandshakeState.Hello.Raw + } + } + // [uTLS SECTION ENDS] + if hello.earlyData { + hello.earlyData = false + c.quicRejectedEarlyData() + } + + if isInnerHello { + // Any extensions which have changed in hello, but are mirrored in the + // outer hello and compressed, need to be copied to the outer hello, so + // they can be properly decompressed by the server. For now, the only + // extension which may have changed is keyShares. + hs.hello.keyShares = hello.keyShares + hs.echContext.innerHello = hello + if hs.uconn != nil && hs.uconn.clientHelloBuildStatus == BuildByUtls { + if err := hs.uconn.computeAndUpdateOuterECHExtension(hs.echContext.innerHello, hs.echContext, false); err != nil { + return err + } + + hs.hello.original = hs.uconn.HandshakeState.Hello.Raw + + if err := hs.uconn.echTranscriptMsg(hs.hello, hs.echContext); err != nil { + return err + } + + } else { + if err := transcriptMsg(hs.echContext.innerHello, hs.echContext.innerTranscript); err != nil { + return err + } + + if err := computeAndUpdateOuterECHExtension(hs.hello, hs.echContext.innerHello, hs.echContext, false); err != nil { + return err + } + } + } else { + hs.hello = hello + } + + if _, err := hs.c.writeHandshakeRecord(hs.hello, hs.transcript); err != nil { + return err + } + + // serverHelloMsg is not included in the transcript + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + + serverHello, ok := msg.(*serverHelloMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(serverHello, msg) + } + hs.serverHello = serverHello + + if err := hs.checkServerHelloOrHRR(); err != nil { + return err + } + + c.didHRR = true + return nil +} + +func (hs *clientHandshakeStateTLS13) processServerHello() error { + c := hs.c + + if bytes.Equal(hs.serverHello.random, helloRetryRequestRandom) { + c.sendAlert(alertUnexpectedMessage) + return errors.New("tls: server sent two HelloRetryRequest messages") + } + + if len(hs.serverHello.cookie) != 0 { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: server sent a cookie in a normal ServerHello") + } + + if hs.serverHello.selectedGroup != 0 { + c.sendAlert(alertDecodeError) + return errors.New("tls: malformed key_share extension") + } + + if hs.serverHello.serverShare.group == 0 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server did not send a key share") + } + if !slices.ContainsFunc(hs.hello.keyShares, func(ks keyShare) bool { + return ks.group == hs.serverHello.serverShare.group + }) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server selected unsupported group") + } + + if !hs.serverHello.selectedIdentityPresent { + return nil + } + + if int(hs.serverHello.selectedIdentity) >= len(hs.hello.pskIdentities) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server selected an invalid PSK") + } + + if len(hs.hello.pskIdentities) != 1 || hs.session == nil { + return c.sendAlert(alertInternalError) + } + pskSuite := cipherSuiteTLS13ByID(hs.session.cipherSuite) + if pskSuite == nil { + return c.sendAlert(alertInternalError) + } + if pskSuite.hash != hs.suite.hash { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server selected an invalid PSK and cipher suite pair") + } + + hs.usingPSK = true + c.didResume = true + c.peerCertificates = hs.session.peerCertificates + c.activeCertHandles = hs.session.activeCertHandles + c.verifiedChains = hs.session.verifiedChains + c.ocspResponse = hs.session.ocspResponse + c.scts = hs.session.scts + return nil +} + +// [uTLS] SECTION BEGIN +func getSharedKey(peerData []byte, key *ecdh.PrivateKey) ([]byte, error) { + peerKey, err := key.Curve().NewPublicKey(peerData) + if err != nil { + return nil, errors.New("tls: invalid server key share") + } + sharedKey, err := key.ECDH(peerKey) + if err != nil { + return nil, errors.New("tls: invalid server key share") + } + + return sharedKey, nil +} + +// [uTLS] SECTION END + +func (hs *clientHandshakeStateTLS13) establishHandshakeKeys() error { + c := hs.c + + ecdhePeerData := hs.serverHello.serverShare.data + if hs.serverHello.serverShare.group == X25519MLKEM768 { + if len(ecdhePeerData) != mlkem.CiphertextSize768+x25519PublicKeySize { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid server X25519MLKEM768 key share") + } + ecdhePeerData = hs.serverHello.serverShare.data[mlkem.CiphertextSize768:] + } + // [uTLS] SECTION BEGIN + if hs.serverHello.serverShare.group == X25519Kyber768Draft00 { + if len(ecdhePeerData) != x25519PublicKeySize+mlkem.CiphertextSize768 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid server X25519Kyber768Draft00 key share") + } + ecdhePeerData = hs.serverHello.serverShare.data[:x25519PublicKeySize] + } + sharedKey, err := getSharedKey(ecdhePeerData, hs.keyShareKeys.ecdhe) + // [uTLS] SECTION END + if err != nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid server key share") + } + if hs.serverHello.serverShare.group == X25519MLKEM768 { + if hs.keyShareKeys.mlkem == nil { + return c.sendAlert(alertInternalError) + } + // [uTLS] SECTION BEGIN + if hs.uconn != nil && hs.uconn.clientHelloBuildStatus == BuildByUtls { + if sharedKey, err = getSharedKey(ecdhePeerData, hs.keyShareKeys.mlkemEcdhe); err != nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid server key share") + } + } + // [uTLS] SECTION END + ciphertext := hs.serverHello.serverShare.data[:mlkem.CiphertextSize768] + mlkemShared, err := hs.keyShareKeys.mlkem.Decapsulate(ciphertext) + if err != nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid X25519MLKEM768 server key share") + } + sharedKey = append(mlkemShared, sharedKey...) + } + // [uTLS] SECTION BEGIN + if hs.serverHello.serverShare.group == X25519Kyber768Draft00 { + if hs.keyShareKeys.mlkem == nil { + return c.sendAlert(alertInternalError) + } + if hs.uconn != nil && hs.uconn.clientHelloBuildStatus == BuildByUtls { + if sharedKey, err = getSharedKey(ecdhePeerData, hs.keyShareKeys.mlkemEcdhe); err != nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid server key share") + } + } + ciphertext := hs.serverHello.serverShare.data[x25519PublicKeySize:] + kyberShared, err := kyberDecapsulate(hs.keyShareKeys.mlkem, ciphertext) + if err != nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid X25519Kyber768Draft00 server key share") + } + sharedKey = append(sharedKey, kyberShared...) + } + // [uTLS] SECTION END + c.curveID = hs.serverHello.serverShare.group + + earlySecret := hs.earlySecret + if !hs.usingPSK { + earlySecret = tls13.NewEarlySecret(hs.suite.hash.New, nil) + } + + handshakeSecret := earlySecret.HandshakeSecret(sharedKey) + + clientSecret := handshakeSecret.ClientHandshakeTrafficSecret(hs.transcript) + c.out.setTrafficSecret(hs.suite, QUICEncryptionLevelHandshake, clientSecret) + serverSecret := handshakeSecret.ServerHandshakeTrafficSecret(hs.transcript) + c.in.setTrafficSecret(hs.suite, QUICEncryptionLevelHandshake, serverSecret) + + if c.quic != nil { + if c.hand.Len() != 0 { + c.sendAlert(alertUnexpectedMessage) + } + c.quicSetWriteSecret(QUICEncryptionLevelHandshake, hs.suite.id, clientSecret) + c.quicSetReadSecret(QUICEncryptionLevelHandshake, hs.suite.id, serverSecret) + } + + err = c.config.writeKeyLog(keyLogLabelClientHandshake, hs.hello.random, clientSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + err = c.config.writeKeyLog(keyLogLabelServerHandshake, hs.hello.random, serverSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + + hs.masterSecret = handshakeSecret.MasterSecret() + + return nil +} + +func (hs *clientHandshakeStateTLS13) readServerParameters() error { + c := hs.c + + msg, err := c.readHandshake(hs.transcript) + if err != nil { + return err + } + + encryptedExtensions, ok := msg.(*encryptedExtensionsMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(encryptedExtensions, msg) + } + + if err := checkALPN(hs.hello.alpnProtocols, encryptedExtensions.alpnProtocol, c.quic != nil); err != nil { + // RFC 8446 specifies that no_application_protocol is sent by servers, but + // does not specify how clients handle the selection of an incompatible protocol. + // RFC 9001 Section 8.1 specifies that QUIC clients send no_application_protocol + // in this case. Always sending no_application_protocol seems reasonable. + c.sendAlert(alertNoApplicationProtocol) + return err + } + c.clientProtocol = encryptedExtensions.alpnProtocol + + // [UTLS SECTION STARTS] + if hs.uconn != nil { + err = hs.utlsReadServerParameters(encryptedExtensions) + if err != nil { + c.sendAlert(alertUnsupportedExtension) + return err + } + } + // [UTLS SECTION ENDS] + + if c.quic != nil { + if encryptedExtensions.quicTransportParameters == nil { + // RFC 9001 Section 8.2. + c.sendAlert(alertMissingExtension) + return errors.New("tls: server did not send a quic_transport_parameters extension") + } + c.quicSetTransportParameters(encryptedExtensions.quicTransportParameters) + } else { + if encryptedExtensions.quicTransportParameters != nil { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: server sent an unexpected quic_transport_parameters extension") + } + } + + if !hs.hello.earlyData && encryptedExtensions.earlyData { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: server sent an unexpected early_data extension") + } + if hs.hello.earlyData && !encryptedExtensions.earlyData { + c.quicRejectedEarlyData() + } + if encryptedExtensions.earlyData { + if hs.session.cipherSuite != c.cipherSuite { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: server accepted 0-RTT with the wrong cipher suite") + } + if hs.session.alpnProtocol != c.clientProtocol { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: server accepted 0-RTT with the wrong ALPN") + } + } + if hs.echContext != nil { + if hs.echContext.echRejected { + hs.echContext.retryConfigs = encryptedExtensions.echRetryConfigs + } else if encryptedExtensions.echRetryConfigs != nil { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: server sent encrypted client hello retry configs after accepting encrypted client hello") + } + } + + return nil +} + +func (hs *clientHandshakeStateTLS13) readServerCertificate() error { + c := hs.c + + // Either a PSK or a certificate is always used, but not both. + // See RFC 8446, Section 4.1.1. + if hs.usingPSK { + // Make sure the connection is still being verified whether or not this + // is a resumption. Resumptions currently don't reverify certificates so + // they don't call verifyServerCertificate. See Issue 31641. + if c.config.VerifyConnection != nil { + if err := c.config.VerifyConnection(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + return nil + } + + // [UTLS SECTION BEGINS] + // msg, err := c.readHandshake(hs.transcript) + msg, err := c.readHandshake(nil) // hold writing to transcript until we know it is not compressed cert + // [UTLS SECTION ENDS] + if err != nil { + return err + } + + certReq, ok := msg.(*certificateRequestMsgTLS13) + if ok { + hs.certReq = certReq + transcriptMsg(certReq, hs.transcript) // [UTLS] if it is certReq (not compressedCert), write to transcript + + // msg, err = c.readHandshake(hs.transcript) + msg, err = c.readHandshake(nil) // [UTLS] we don't write to transcript until make sure it is not compressed cert + if err != nil { + return err + } + } + + // [UTLS SECTION BEGINS] + var skipWritingCertToTranscript bool = false + if hs.uconn != nil { + processedMsg, err := hs.utlsReadServerCertificate(msg) + if err != nil { + return err + } + if processedMsg != nil { + skipWritingCertToTranscript = true + msg = processedMsg // msg is now a processed-by-extension certificateMsg + } + } + // [UTLS SECTION ENDS] + + certMsg, ok := msg.(*certificateMsgTLS13) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(certMsg, msg) + } + if len(certMsg.certificate.Certificate) == 0 { + c.sendAlert(alertDecodeError) + return errors.New("tls: received empty certificates message") + } + // [UTLS SECTION BEGINS] + if !skipWritingCertToTranscript { // write to transcript only if it is not compressedCert (i.e. if not processed by extension) + if err = transcriptMsg(certMsg, hs.transcript); err != nil { + return err + } + } + // [UTLS SECTION ENDS] + + c.scts = certMsg.certificate.SignedCertificateTimestamps + c.ocspResponse = certMsg.certificate.OCSPStaple + + if err := c.verifyServerCertificate(certMsg.certificate.Certificate); err != nil { + return err + } + + // certificateVerifyMsg is included in the transcript, but not until + // after we verify the handshake signature, since the state before + // this message was sent is used. + msg, err = c.readHandshake(nil) + if err != nil { + return err + } + + certVerify, ok := msg.(*certificateVerifyMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(certVerify, msg) + } + + // See RFC 8446, Section 4.4.3. + if !isSupportedSignatureAlgorithm(certVerify.signatureAlgorithm, supportedSignatureAlgorithms()) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: certificate used with invalid signature algorithm") + } + sigType, sigHash, err := typeAndHashFromSignatureScheme(certVerify.signatureAlgorithm) + if err != nil { + return c.sendAlert(alertInternalError) + } + if sigType == signaturePKCS1v15 || sigHash == crypto.SHA1 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: certificate used with invalid signature algorithm") + } + signed := signedMessage(sigHash, serverSignatureContext, hs.transcript) + if err := verifyHandshakeSignature(sigType, c.peerCertificates[0].PublicKey, + sigHash, signed, certVerify.signature); err != nil { + c.sendAlert(alertDecryptError) + return errors.New("tls: invalid signature by the server certificate: " + err.Error()) + } + + if err := transcriptMsg(certVerify, hs.transcript); err != nil { + return err + } + + return nil +} + +func (hs *clientHandshakeStateTLS13) readServerFinished() error { + c := hs.c + + // finishedMsg is included in the transcript, but not until after we + // check the client version, since the state before this message was + // sent is used during verification. + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + + finished, ok := msg.(*finishedMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(finished, msg) + } + + expectedMAC := hs.suite.finishedHash(c.in.trafficSecret, hs.transcript) + if !hmac.Equal(expectedMAC, finished.verifyData) { + c.sendAlert(alertDecryptError) + return errors.New("tls: invalid server finished hash") + } + + if err := transcriptMsg(finished, hs.transcript); err != nil { + return err + } + + // Derive secrets that take context through the server Finished. + + hs.trafficSecret = hs.masterSecret.ClientApplicationTrafficSecret(hs.transcript) + serverSecret := hs.masterSecret.ServerApplicationTrafficSecret(hs.transcript) + c.in.setTrafficSecret(hs.suite, QUICEncryptionLevelApplication, serverSecret) + + err = c.config.writeKeyLog(keyLogLabelClientTraffic, hs.hello.random, hs.trafficSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + err = c.config.writeKeyLog(keyLogLabelServerTraffic, hs.hello.random, serverSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + + c.ekm = hs.suite.exportKeyingMaterial(hs.masterSecret, hs.transcript) + + return nil +} + +func (hs *clientHandshakeStateTLS13) sendClientCertificate() error { + c := hs.c + + if hs.certReq == nil { + return nil + } + + if hs.echContext != nil && hs.echContext.echRejected { + if _, err := hs.c.writeHandshakeRecord(&certificateMsgTLS13{}, hs.transcript); err != nil { + return err + } + return nil + } + + cert, err := c.getClientCertificate(&CertificateRequestInfo{ + AcceptableCAs: hs.certReq.certificateAuthorities, + SignatureSchemes: hs.certReq.supportedSignatureAlgorithms, + Version: c.vers, + ctx: hs.ctx, + }) + if err != nil { + return err + } + + certMsg := new(certificateMsgTLS13) + + certMsg.certificate = *cert + certMsg.scts = hs.certReq.scts && len(cert.SignedCertificateTimestamps) > 0 + certMsg.ocspStapling = hs.certReq.ocspStapling && len(cert.OCSPStaple) > 0 + + if _, err := hs.c.writeHandshakeRecord(certMsg, hs.transcript); err != nil { + return err + } + + // If we sent an empty certificate message, skip the CertificateVerify. + if len(cert.Certificate) == 0 { + return nil + } + + certVerifyMsg := new(certificateVerifyMsg) + certVerifyMsg.hasSignatureAlgorithm = true + + certVerifyMsg.signatureAlgorithm, err = selectSignatureScheme(c.vers, cert, hs.certReq.supportedSignatureAlgorithms) + if err != nil { + // getClientCertificate returned a certificate incompatible with the + // CertificateRequestInfo supported signature algorithms. + c.sendAlert(alertHandshakeFailure) + return err + } + + sigType, sigHash, err := typeAndHashFromSignatureScheme(certVerifyMsg.signatureAlgorithm) + if err != nil { + return c.sendAlert(alertInternalError) + } + + signed := signedMessage(sigHash, clientSignatureContext, hs.transcript) + signOpts := crypto.SignerOpts(sigHash) + if sigType == signatureRSAPSS { + signOpts = &rsa.PSSOptions{SaltLength: rsa.PSSSaltLengthEqualsHash, Hash: sigHash} + } + sig, err := cert.PrivateKey.(crypto.Signer).Sign(c.config.rand(), signed, signOpts) + if err != nil { + c.sendAlert(alertInternalError) + return errors.New("tls: failed to sign handshake: " + err.Error()) + } + certVerifyMsg.signature = sig + + if _, err := hs.c.writeHandshakeRecord(certVerifyMsg, hs.transcript); err != nil { + return err + } + + return nil +} + +func (hs *clientHandshakeStateTLS13) sendClientFinished() error { + c := hs.c + + finished := &finishedMsg{ + verifyData: hs.suite.finishedHash(c.out.trafficSecret, hs.transcript), + } + + if _, err := hs.c.writeHandshakeRecord(finished, hs.transcript); err != nil { + return err + } + + c.out.setTrafficSecret(hs.suite, QUICEncryptionLevelApplication, hs.trafficSecret) + + if !c.config.SessionTicketsDisabled && c.config.ClientSessionCache != nil { + c.resumptionSecret = hs.masterSecret.ResumptionMasterSecret(hs.transcript) + } + + if c.quic != nil { + if c.hand.Len() != 0 { + c.sendAlert(alertUnexpectedMessage) + } + c.quicSetWriteSecret(QUICEncryptionLevelApplication, hs.suite.id, hs.trafficSecret) + } + + return nil +} + +func (c *Conn) handleNewSessionTicket(msg *newSessionTicketMsgTLS13) error { + if !c.isClient { + c.sendAlert(alertUnexpectedMessage) + return errors.New("tls: received new session ticket from a client") + } + + if c.config.SessionTicketsDisabled || c.config.ClientSessionCache == nil { + return nil + } + + // See RFC 8446, Section 4.6.1. + if msg.lifetime == 0 { + return nil + } + lifetime := time.Duration(msg.lifetime) * time.Second + if lifetime > maxSessionTicketLifetime { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: received a session ticket with invalid lifetime") + } + + // RFC 9001, Section 4.6.1 + if c.quic != nil && msg.maxEarlyData != 0 && msg.maxEarlyData != 0xffffffff { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid early data for QUIC connection") + } + + cipherSuite := cipherSuiteTLS13ByID(c.cipherSuite) + if cipherSuite == nil || c.resumptionSecret == nil { + return c.sendAlert(alertInternalError) + } + + psk := tls13.ExpandLabel(cipherSuite.hash.New, c.resumptionSecret, "resumption", + msg.nonce, cipherSuite.hash.Size()) + + session := c.sessionState() + session.secret = psk + session.useBy = uint64(c.config.time().Add(lifetime).Unix()) + session.ageAdd = msg.ageAdd + session.EarlyData = c.quic != nil && msg.maxEarlyData == 0xffffffff // RFC 9001, Section 4.6.1 + session.ticket = msg.label + if c.quic != nil && c.quic.enableSessionEvents { + c.quicStoreSession(session) + return nil + } + cs := &ClientSessionState{session: session} + if cacheKey := c.clientSessionCacheKey(); cacheKey != "" { + c.config.ClientSessionCache.Put(cacheKey, cs) + } + + return nil +} diff --git a/backend/vendor/github.com/enetx/utls/handshake_messages.go b/backend/vendor/github.com/enetx/utls/handshake_messages.go new file mode 100644 index 0000000..3304283 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/handshake_messages.go @@ -0,0 +1,2004 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "errors" + "fmt" + "slices" + "strings" + + "golang.org/x/crypto/cryptobyte" +) + +// The marshalingFunction type is an adapter to allow the use of ordinary +// functions as cryptobyte.MarshalingValue. +type marshalingFunction func(b *cryptobyte.Builder) error + +func (f marshalingFunction) Marshal(b *cryptobyte.Builder) error { + return f(b) +} + +// addBytesWithLength appends a sequence of bytes to the cryptobyte.Builder. If +// the length of the sequence is not the value specified, it produces an error. +func addBytesWithLength(b *cryptobyte.Builder, v []byte, n int) { + b.AddValue(marshalingFunction(func(b *cryptobyte.Builder) error { + if len(v) != n { + return fmt.Errorf("invalid value length: expected %d, got %d", n, len(v)) + } + b.AddBytes(v) + return nil + })) +} + +// addUint64 appends a big-endian, 64-bit value to the cryptobyte.Builder. +func addUint64(b *cryptobyte.Builder, v uint64) { + b.AddUint32(uint32(v >> 32)) + b.AddUint32(uint32(v)) +} + +// readUint64 decodes a big-endian, 64-bit value into out and advances over it. +// It reports whether the read was successful. +func readUint64(s *cryptobyte.String, out *uint64) bool { + var hi, lo uint32 + if !s.ReadUint32(&hi) || !s.ReadUint32(&lo) { + return false + } + *out = uint64(hi)<<32 | uint64(lo) + return true +} + +// readUint8LengthPrefixed acts like s.ReadUint8LengthPrefixed, but targets a +// []byte instead of a cryptobyte.String. +func readUint8LengthPrefixed(s *cryptobyte.String, out *[]byte) bool { + return s.ReadUint8LengthPrefixed((*cryptobyte.String)(out)) +} + +// readUint16LengthPrefixed acts like s.ReadUint16LengthPrefixed, but targets a +// []byte instead of a cryptobyte.String. +func readUint16LengthPrefixed(s *cryptobyte.String, out *[]byte) bool { + return s.ReadUint16LengthPrefixed((*cryptobyte.String)(out)) +} + +// readUint24LengthPrefixed acts like s.ReadUint24LengthPrefixed, but targets a +// []byte instead of a cryptobyte.String. +func readUint24LengthPrefixed(s *cryptobyte.String, out *[]byte) bool { + return s.ReadUint24LengthPrefixed((*cryptobyte.String)(out)) +} + +type clientHelloMsg struct { + original []byte + vers uint16 + random []byte + sessionId []byte + cipherSuites []uint16 + compressionMethods []uint8 + serverName string + ocspStapling bool + supportedCurves []CurveID + supportedPoints []uint8 + ticketSupported bool + sessionTicket []uint8 + supportedSignatureAlgorithms []SignatureScheme + supportedSignatureAlgorithmsCert []SignatureScheme + secureRenegotiationSupported bool + secureRenegotiation []byte + extendedMasterSecret bool + alpnProtocols []string + scts bool + // ems bool // [uTLS] actually implemented due to its prevalence // removed since crypto/tls implements it + supportedVersions []uint16 + cookie []byte + keyShares []keyShare + earlyData bool + pskModes []uint8 + pskIdentities []pskIdentity + pskBinders [][]byte + quicTransportParameters []byte + encryptedClientHello []byte + // extensions are only populated on the server-side of a handshake + extensions []uint16 + + // [uTLS] + nextProtoNeg bool +} + +func (m *clientHelloMsg) marshalMsg(echInner bool) ([]byte, error) { + // [uTLS SECTION BEGIN] + return m.marshalMsgReorderOuterExts(echInner, nil) +} + +func (m *clientHelloMsg) marshalMsgReorderOuterExts(echInner bool, outerExts []uint16) ([]byte, error) { + // [uTLS SECTION END] + var exts cryptobyte.Builder + if len(m.serverName) > 0 { + // RFC 6066, Section 3 + exts.AddUint16(extensionServerName) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8(0) // name_type = host_name + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes([]byte(m.serverName)) + }) + }) + }) + } + if len(m.supportedPoints) > 0 && !echInner { + // RFC 4492, Section 5.1.2 + exts.AddUint16(extensionSupportedPoints) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.supportedPoints) + }) + }) + } + if m.ticketSupported && !echInner { + // RFC 5077, Section 3.2 + exts.AddUint16(extensionSessionTicket) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.sessionTicket) + }) + } + if m.secureRenegotiationSupported && !echInner { + // RFC 5746, Section 3.2 + exts.AddUint16(extensionRenegotiationInfo) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.secureRenegotiation) + }) + }) + } + if m.extendedMasterSecret && !echInner { + // RFC 7627 + exts.AddUint16(extensionExtendedMasterSecret) + exts.AddUint16(0) // empty extension_data + } + if m.scts { + // RFC 6962, Section 3.3.1 + exts.AddUint16(extensionSCT) + exts.AddUint16(0) // empty extension_data + } + if m.earlyData { + // RFC 8446, Section 4.2.10 + exts.AddUint16(extensionEarlyData) + exts.AddUint16(0) // empty extension_data + } + if m.quicTransportParameters != nil { // marshal zero-length parameters when present + // RFC 9001, Section 8.2 + exts.AddUint16(extensionQUICTransportParameters) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.quicTransportParameters) + }) + } + if len(m.encryptedClientHello) > 0 { + exts.AddUint16(extensionEncryptedClientHello) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.encryptedClientHello) + }) + } + // Note that any extension that can be compressed during ECH must be + // contiguous. If any additional extensions are to be compressed they must + // be added to the following block, so that they can be properly + // decompressed on the other side. + var echOuterExts []uint16 + if m.ocspStapling { + // RFC 4366, Section 3.6 + if echInner { + echOuterExts = append(echOuterExts, extensionStatusRequest) + } else { + exts.AddUint16(extensionStatusRequest) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8(1) // status_type = ocsp + exts.AddUint16(0) // empty responder_id_list + exts.AddUint16(0) // empty request_extensions + }) + } + } + if len(m.supportedCurves) > 0 { + // RFC 4492, sections 5.1.1 and RFC 8446, Section 4.2.7 + if echInner { + echOuterExts = append(echOuterExts, extensionSupportedCurves) + } else { + exts.AddUint16(extensionSupportedCurves) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, curve := range m.supportedCurves { + exts.AddUint16(uint16(curve)) + } + }) + }) + } + } + if len(m.supportedSignatureAlgorithms) > 0 { + // RFC 5246, Section 7.4.1.4.1 + if echInner { + echOuterExts = append(echOuterExts, extensionSignatureAlgorithms) + } else { + exts.AddUint16(extensionSignatureAlgorithms) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, sigAlgo := range m.supportedSignatureAlgorithms { + exts.AddUint16(uint16(sigAlgo)) + } + }) + }) + } + } + if len(m.supportedSignatureAlgorithmsCert) > 0 { + // RFC 8446, Section 4.2.3 + if echInner { + echOuterExts = append(echOuterExts, extensionSignatureAlgorithmsCert) + } else { + exts.AddUint16(extensionSignatureAlgorithmsCert) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, sigAlgo := range m.supportedSignatureAlgorithmsCert { + exts.AddUint16(uint16(sigAlgo)) + } + }) + }) + } + } + if len(m.alpnProtocols) > 0 { + // RFC 7301, Section 3.1 + if echInner { + echOuterExts = append(echOuterExts, extensionALPN) + } else { + exts.AddUint16(extensionALPN) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, proto := range m.alpnProtocols { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes([]byte(proto)) + }) + } + }) + }) + } + } + if len(m.supportedVersions) > 0 { + // RFC 8446, Section 4.2.1 + if echInner && outerExts == nil { // uTLS + echOuterExts = append(echOuterExts, extensionSupportedVersions) + } else { + exts.AddUint16(extensionSupportedVersions) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, vers := range m.supportedVersions { + exts.AddUint16(vers) + } + }) + }) + } + } + if len(m.cookie) > 0 { + // RFC 8446, Section 4.2.2 + if echInner { + echOuterExts = append(echOuterExts, extensionCookie) + } else { + exts.AddUint16(extensionCookie) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.cookie) + }) + }) + } + } + if len(m.keyShares) > 0 { + // RFC 8446, Section 4.2.8 + if echInner { + echOuterExts = append(echOuterExts, extensionKeyShare) + } else { + exts.AddUint16(extensionKeyShare) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, ks := range m.keyShares { + exts.AddUint16(uint16(ks.group)) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(ks.data) + }) + } + }) + }) + } + } + if len(m.pskModes) > 0 { + // RFC 8446, Section 4.2.9 + if echInner { + echOuterExts = append(echOuterExts, extensionPSKModes) + } else { + exts.AddUint16(extensionPSKModes) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.pskModes) + }) + }) + } + } + // [uTLS SECTION BEGIN] + // reorder OuterExtensions according to their order in the spec + if echInner && outerExts != nil { + echOuterExtsReordered := slices.Collect(func(yield func(uint16) bool) { + for _, ext := range outerExts { + if slices.Contains(echOuterExts, ext) { + if !yield(ext) { + return + } + } + } + }) + echOuterExts = echOuterExtsReordered + } + // [uTLS SECTION END] + if len(echOuterExts) > 0 && echInner { + exts.AddUint16(extensionECHOuterExtensions) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, e := range echOuterExts { + exts.AddUint16(e) + } + }) + }) + } + if len(m.pskIdentities) > 0 { // pre_shared_key must be the last extension + // RFC 8446, Section 4.2.11 + exts.AddUint16(extensionPreSharedKey) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, psk := range m.pskIdentities { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(psk.label) + }) + exts.AddUint32(psk.obfuscatedTicketAge) + } + }) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, binder := range m.pskBinders { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(binder) + }) + } + }) + }) + } + extBytes, err := exts.Bytes() + if err != nil { + return nil, err + } + + var b cryptobyte.Builder + b.AddUint8(typeClientHello) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16(m.vers) + addBytesWithLength(b, m.random, 32) + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + if !echInner { + b.AddBytes(m.sessionId) + } + }) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + for _, suite := range m.cipherSuites { + b.AddUint16(suite) + } + }) + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.compressionMethods) + }) + + if len(extBytes) > 0 { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(extBytes) + }) + } + }) + + return b.Bytes() +} + +func (m *clientHelloMsg) marshal() ([]byte, error) { + // [uTLS SECTION START] + if m.original != nil { + return m.original, nil + } + // [uTLS SECTION END] + + return m.marshalMsg(false) +} + +// marshalWithoutBinders returns the ClientHello through the +// PreSharedKeyExtension.identities field, according to RFC 8446, Section +// 4.2.11.2. Note that m.pskBinders must be set to slices of the correct length. +func (m *clientHelloMsg) marshalWithoutBinders() ([]byte, error) { + bindersLen := 2 // uint16 length prefix + for _, binder := range m.pskBinders { + bindersLen += 1 // uint8 length prefix + bindersLen += len(binder) + } + + var fullMessage []byte + if m.original != nil { + fullMessage = m.original + } else { + var err error + fullMessage, err = m.marshal() + if err != nil { + return nil, err + } + } + return fullMessage[:len(fullMessage)-bindersLen], nil +} + +// updateBinders updates the m.pskBinders field. The supplied binders must have +// the same length as the current m.pskBinders. +func (m *clientHelloMsg) updateBinders(pskBinders [][]byte) error { + if len(pskBinders) != len(m.pskBinders) { + return errors.New("tls: internal error: pskBinders length mismatch") + } + for i := range m.pskBinders { + if len(pskBinders[i]) != len(m.pskBinders[i]) { + return errors.New("tls: internal error: pskBinders length mismatch") + } + } + m.pskBinders = pskBinders + + return nil +} + +func (m *clientHelloMsg) unmarshal(data []byte) bool { + *m = clientHelloMsg{original: data} + s := cryptobyte.String(data) + + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint16(&m.vers) || !s.ReadBytes(&m.random, 32) || + !readUint8LengthPrefixed(&s, &m.sessionId) { + return false + } + + var cipherSuites cryptobyte.String + if !s.ReadUint16LengthPrefixed(&cipherSuites) { + return false + } + m.cipherSuites = []uint16{} + m.secureRenegotiationSupported = false + for !cipherSuites.Empty() { + var suite uint16 + if !cipherSuites.ReadUint16(&suite) { + return false + } + if suite == scsvRenegotiation { + m.secureRenegotiationSupported = true + } + m.cipherSuites = append(m.cipherSuites, suite) + } + + if !readUint8LengthPrefixed(&s, &m.compressionMethods) { + return false + } + + if s.Empty() { + // ClientHello is optionally followed by extension data + return true + } + + var extensions cryptobyte.String + if !s.ReadUint16LengthPrefixed(&extensions) || !s.Empty() { + return false + } + + seenExts := make(map[uint16]bool) + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return false + } + + if seenExts[extension] { + return false + } + seenExts[extension] = true + m.extensions = append(m.extensions, extension) + + switch extension { + case extensionServerName: + // RFC 6066, Section 3 + var nameList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&nameList) || nameList.Empty() { + return false + } + for !nameList.Empty() { + var nameType uint8 + var serverName cryptobyte.String + if !nameList.ReadUint8(&nameType) || + !nameList.ReadUint16LengthPrefixed(&serverName) || + serverName.Empty() { + return false + } + if nameType != 0 { + continue + } + if len(m.serverName) != 0 { + // Multiple names of the same name_type are prohibited. + return false + } + m.serverName = string(serverName) + // An SNI value may not include a trailing dot. + if strings.HasSuffix(m.serverName, ".") { + return false + } + } + case extensionStatusRequest: + // RFC 4366, Section 3.6 + var statusType uint8 + var ignored cryptobyte.String + if !extData.ReadUint8(&statusType) || + !extData.ReadUint16LengthPrefixed(&ignored) || + !extData.ReadUint16LengthPrefixed(&ignored) { + return false + } + m.ocspStapling = statusType == statusTypeOCSP + case extensionSupportedCurves: + // RFC 4492, sections 5.1.1 and RFC 8446, Section 4.2.7 + var curves cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&curves) || curves.Empty() { + return false + } + for !curves.Empty() { + var curve uint16 + if !curves.ReadUint16(&curve) { + return false + } + m.supportedCurves = append(m.supportedCurves, CurveID(curve)) + } + case extensionSupportedPoints: + // RFC 4492, Section 5.1.2 + if !readUint8LengthPrefixed(&extData, &m.supportedPoints) || + len(m.supportedPoints) == 0 { + return false + } + case extensionSessionTicket: + // RFC 5077, Section 3.2 + m.ticketSupported = true + extData.ReadBytes(&m.sessionTicket, len(extData)) + case extensionSignatureAlgorithms: + // RFC 5246, Section 7.4.1.4.1 + var sigAndAlgs cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sigAndAlgs) || sigAndAlgs.Empty() { + return false + } + for !sigAndAlgs.Empty() { + var sigAndAlg uint16 + if !sigAndAlgs.ReadUint16(&sigAndAlg) { + return false + } + m.supportedSignatureAlgorithms = append( + m.supportedSignatureAlgorithms, SignatureScheme(sigAndAlg)) + } + case extensionSignatureAlgorithmsCert: + // RFC 8446, Section 4.2.3 + var sigAndAlgs cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sigAndAlgs) || sigAndAlgs.Empty() { + return false + } + for !sigAndAlgs.Empty() { + var sigAndAlg uint16 + if !sigAndAlgs.ReadUint16(&sigAndAlg) { + return false + } + m.supportedSignatureAlgorithmsCert = append( + m.supportedSignatureAlgorithmsCert, SignatureScheme(sigAndAlg)) + } + case extensionRenegotiationInfo: + // RFC 5746, Section 3.2 + if !readUint8LengthPrefixed(&extData, &m.secureRenegotiation) { + return false + } + m.secureRenegotiationSupported = true + case extensionExtendedMasterSecret: + // RFC 7627 + m.extendedMasterSecret = true + case extensionALPN: + // RFC 7301, Section 3.1 + var protoList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&protoList) || protoList.Empty() { + return false + } + for !protoList.Empty() { + var proto cryptobyte.String + if !protoList.ReadUint8LengthPrefixed(&proto) || proto.Empty() { + return false + } + m.alpnProtocols = append(m.alpnProtocols, string(proto)) + } + case extensionSCT: + // RFC 6962, Section 3.3.1 + m.scts = true + case extensionSupportedVersions: + // RFC 8446, Section 4.2.1 + var versList cryptobyte.String + if !extData.ReadUint8LengthPrefixed(&versList) || versList.Empty() { + return false + } + for !versList.Empty() { + var vers uint16 + if !versList.ReadUint16(&vers) { + return false + } + m.supportedVersions = append(m.supportedVersions, vers) + } + case extensionCookie: + // RFC 8446, Section 4.2.2 + if !readUint16LengthPrefixed(&extData, &m.cookie) || + len(m.cookie) == 0 { + return false + } + case extensionKeyShare: + // RFC 8446, Section 4.2.8 + var clientShares cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&clientShares) { + return false + } + for !clientShares.Empty() { + var ks keyShare + if !clientShares.ReadUint16((*uint16)(&ks.group)) || + !readUint16LengthPrefixed(&clientShares, &ks.data) || + len(ks.data) == 0 { + return false + } + m.keyShares = append(m.keyShares, ks) + } + case extensionEarlyData: + // RFC 8446, Section 4.2.10 + m.earlyData = true + case extensionPSKModes: + // RFC 8446, Section 4.2.9 + if !readUint8LengthPrefixed(&extData, &m.pskModes) { + return false + } + case extensionQUICTransportParameters: + m.quicTransportParameters = make([]byte, len(extData)) + if !extData.CopyBytes(m.quicTransportParameters) { + return false + } + case extensionPreSharedKey: + // RFC 8446, Section 4.2.11 + if !extensions.Empty() { + return false // pre_shared_key must be the last extension + } + var identities cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&identities) || identities.Empty() { + return false + } + for !identities.Empty() { + var psk pskIdentity + if !readUint16LengthPrefixed(&identities, &psk.label) || + !identities.ReadUint32(&psk.obfuscatedTicketAge) || + len(psk.label) == 0 { + return false + } + m.pskIdentities = append(m.pskIdentities, psk) + } + var binders cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&binders) || binders.Empty() { + return false + } + for !binders.Empty() { + var binder []byte + if !readUint8LengthPrefixed(&binders, &binder) || + len(binder) == 0 { + return false + } + m.pskBinders = append(m.pskBinders, binder) + } + case extensionEncryptedClientHello: + if !extData.ReadBytes(&m.encryptedClientHello, len(extData)) { + return false + } + default: + // Ignore unknown extensions. + continue + } + + if !extData.Empty() { + return false + } + } + + return true +} + +func (m *clientHelloMsg) originalBytes() []byte { + return m.original +} + +func (m *clientHelloMsg) clone() *clientHelloMsg { + return &clientHelloMsg{ + original: slices.Clone(m.original), + vers: m.vers, + random: slices.Clone(m.random), + sessionId: slices.Clone(m.sessionId), + cipherSuites: slices.Clone(m.cipherSuites), + compressionMethods: slices.Clone(m.compressionMethods), + serverName: m.serverName, + ocspStapling: m.ocspStapling, + supportedCurves: slices.Clone(m.supportedCurves), + supportedPoints: slices.Clone(m.supportedPoints), + ticketSupported: m.ticketSupported, + sessionTicket: slices.Clone(m.sessionTicket), + supportedSignatureAlgorithms: slices.Clone(m.supportedSignatureAlgorithms), + supportedSignatureAlgorithmsCert: slices.Clone(m.supportedSignatureAlgorithmsCert), + secureRenegotiationSupported: m.secureRenegotiationSupported, + secureRenegotiation: slices.Clone(m.secureRenegotiation), + extendedMasterSecret: m.extendedMasterSecret, + alpnProtocols: slices.Clone(m.alpnProtocols), + scts: m.scts, + supportedVersions: slices.Clone(m.supportedVersions), + cookie: slices.Clone(m.cookie), + keyShares: slices.Clone(m.keyShares), + earlyData: m.earlyData, + pskModes: slices.Clone(m.pskModes), + pskIdentities: slices.Clone(m.pskIdentities), + pskBinders: slices.Clone(m.pskBinders), + quicTransportParameters: slices.Clone(m.quicTransportParameters), + encryptedClientHello: slices.Clone(m.encryptedClientHello), + } +} + +type serverHelloMsg struct { + original []byte + vers uint16 + random []byte + sessionId []byte + cipherSuite uint16 + compressionMethod uint8 + ocspStapling bool + ticketSupported bool + secureRenegotiationSupported bool + secureRenegotiation []byte + extendedMasterSecret bool + alpnProtocol string + scts [][]byte + supportedVersion uint16 + serverShare keyShare + selectedIdentityPresent bool + selectedIdentity uint16 + supportedPoints []uint8 + encryptedClientHello []byte + serverNameAck bool + + // HelloRetryRequest extensions + cookie []byte + selectedGroup CurveID + + // [uTLS] + nextProtoNeg bool + nextProtos []string +} + +func (m *serverHelloMsg) marshal() ([]byte, error) { + var exts cryptobyte.Builder + if m.ocspStapling { + exts.AddUint16(extensionStatusRequest) + exts.AddUint16(0) // empty extension_data + } + if m.ticketSupported { + exts.AddUint16(extensionSessionTicket) + exts.AddUint16(0) // empty extension_data + } + if m.secureRenegotiationSupported { + exts.AddUint16(extensionRenegotiationInfo) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.secureRenegotiation) + }) + }) + } + if m.extendedMasterSecret { + exts.AddUint16(extensionExtendedMasterSecret) + exts.AddUint16(0) // empty extension_data + } + if len(m.alpnProtocol) > 0 { + exts.AddUint16(extensionALPN) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes([]byte(m.alpnProtocol)) + }) + }) + }) + } + if len(m.scts) > 0 { + exts.AddUint16(extensionSCT) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, sct := range m.scts { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(sct) + }) + } + }) + }) + } + if m.supportedVersion != 0 { + exts.AddUint16(extensionSupportedVersions) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16(m.supportedVersion) + }) + } + if m.serverShare.group != 0 { + exts.AddUint16(extensionKeyShare) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16(uint16(m.serverShare.group)) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.serverShare.data) + }) + }) + } + if m.selectedIdentityPresent { + exts.AddUint16(extensionPreSharedKey) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16(m.selectedIdentity) + }) + } + + if len(m.cookie) > 0 { + exts.AddUint16(extensionCookie) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.cookie) + }) + }) + } + if m.selectedGroup != 0 { + exts.AddUint16(extensionKeyShare) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16(uint16(m.selectedGroup)) + }) + } + if len(m.supportedPoints) > 0 { + exts.AddUint16(extensionSupportedPoints) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.supportedPoints) + }) + }) + } + if len(m.encryptedClientHello) > 0 { + exts.AddUint16(extensionEncryptedClientHello) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.encryptedClientHello) + }) + } + if m.serverNameAck { + exts.AddUint16(extensionServerName) + exts.AddUint16(0) + } + + extBytes, err := exts.Bytes() + if err != nil { + return nil, err + } + + var b cryptobyte.Builder + b.AddUint8(typeServerHello) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16(m.vers) + addBytesWithLength(b, m.random, 32) + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.sessionId) + }) + b.AddUint16(m.cipherSuite) + b.AddUint8(m.compressionMethod) + + if len(extBytes) > 0 { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(extBytes) + }) + } + }) + + return b.Bytes() +} + +func (m *serverHelloMsg) unmarshal(data []byte) bool { + *m = serverHelloMsg{original: data} + s := cryptobyte.String(data) + + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint16(&m.vers) || !s.ReadBytes(&m.random, 32) || + !readUint8LengthPrefixed(&s, &m.sessionId) || + !s.ReadUint16(&m.cipherSuite) || + !s.ReadUint8(&m.compressionMethod) { + return false + } + + if s.Empty() { + // ServerHello is optionally followed by extension data + return true + } + + var extensions cryptobyte.String + if !s.ReadUint16LengthPrefixed(&extensions) || !s.Empty() { + return false + } + + seenExts := make(map[uint16]bool) + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return false + } + + if seenExts[extension] { + return false + } + seenExts[extension] = true + + switch extension { + case extensionStatusRequest: + m.ocspStapling = true + case extensionSessionTicket: + m.ticketSupported = true + // [UTLS] crypto/tls finally supports EMS! Now we don't do anything special here. + // case utlsExtensionExtendedMasterSecret: + // // No sanity check for this extension: pretending not to know it. + // // if length > 0 { + // // return false + // // } + // m.ems = true + case extensionRenegotiationInfo: + if !readUint8LengthPrefixed(&extData, &m.secureRenegotiation) { + return false + } + m.secureRenegotiationSupported = true + case extensionExtendedMasterSecret: + m.extendedMasterSecret = true + case extensionALPN: + var protoList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&protoList) || protoList.Empty() { + return false + } + var proto cryptobyte.String + if !protoList.ReadUint8LengthPrefixed(&proto) || + proto.Empty() || !protoList.Empty() { + return false + } + m.alpnProtocol = string(proto) + case extensionSCT: + var sctList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sctList) || sctList.Empty() { + return false + } + for !sctList.Empty() { + var sct []byte + if !readUint16LengthPrefixed(&sctList, &sct) || + len(sct) == 0 { + return false + } + m.scts = append(m.scts, sct) + } + case extensionSupportedVersions: + if !extData.ReadUint16(&m.supportedVersion) { + return false + } + case extensionCookie: + if !readUint16LengthPrefixed(&extData, &m.cookie) || + len(m.cookie) == 0 { + return false + } + case extensionKeyShare: + // This extension has different formats in SH and HRR, accept either + // and let the handshake logic decide. See RFC 8446, Section 4.2.8. + if len(extData) == 2 { + if !extData.ReadUint16((*uint16)(&m.selectedGroup)) { + return false + } + } else { + if !extData.ReadUint16((*uint16)(&m.serverShare.group)) || + !readUint16LengthPrefixed(&extData, &m.serverShare.data) { + return false + } + } + case extensionPreSharedKey: + m.selectedIdentityPresent = true + if !extData.ReadUint16(&m.selectedIdentity) { + return false + } + case extensionSupportedPoints: + // RFC 4492, Section 5.1.2 + if !readUint8LengthPrefixed(&extData, &m.supportedPoints) || + len(m.supportedPoints) == 0 { + return false + } + case extensionEncryptedClientHello: // encrypted_client_hello + m.encryptedClientHello = make([]byte, len(extData)) + if !extData.CopyBytes(m.encryptedClientHello) { + return false + } + case extensionServerName: + if len(extData) != 0 { + return false + } + m.serverNameAck = true + default: + // Ignore unknown extensions. + continue + } + + if !extData.Empty() { + return false + } + } + + return true +} + +func (m *serverHelloMsg) originalBytes() []byte { + return m.original +} + +type encryptedExtensionsMsg struct { + alpnProtocol string + quicTransportParameters []byte + earlyData bool + echRetryConfigs []byte + + utls utlsEncryptedExtensionsMsgExtraFields // [uTLS] +} + +func (m *encryptedExtensionsMsg) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeEncryptedExtensions) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + if len(m.alpnProtocol) > 0 { + b.AddUint16(extensionALPN) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes([]byte(m.alpnProtocol)) + }) + }) + }) + } + if m.quicTransportParameters != nil { // marshal zero-length parameters when present + // draft-ietf-quic-tls-32, Section 8.2 + b.AddUint16(extensionQUICTransportParameters) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.quicTransportParameters) + }) + } + if m.earlyData { + // RFC 8446, Section 4.2.10 + b.AddUint16(extensionEarlyData) + b.AddUint16(0) // empty extension_data + } + if len(m.echRetryConfigs) > 0 { + b.AddUint16(extensionEncryptedClientHello) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.echRetryConfigs) + }) + } + }) + }) + + return b.Bytes() +} + +func (m *encryptedExtensionsMsg) unmarshal(data []byte) bool { + *m = encryptedExtensionsMsg{} + s := cryptobyte.String(data) + + var extensions cryptobyte.String + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint16LengthPrefixed(&extensions) || !s.Empty() { + return false + } + + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return false + } + + switch extension { + case extensionALPN: + var protoList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&protoList) || protoList.Empty() { + return false + } + var proto cryptobyte.String + if !protoList.ReadUint8LengthPrefixed(&proto) || + proto.Empty() || !protoList.Empty() { + return false + } + m.alpnProtocol = string(proto) + case extensionQUICTransportParameters: + m.quicTransportParameters = make([]byte, len(extData)) + if !extData.CopyBytes(m.quicTransportParameters) { + return false + } + case extensionEarlyData: + // RFC 8446, Section 4.2.10 + m.earlyData = true + case extensionEncryptedClientHello: + m.echRetryConfigs = make([]byte, len(extData)) + if !extData.CopyBytes(m.echRetryConfigs) { + return false + } + default: + // [UTLS SECTION START] + if !m.utlsUnmarshal(extension, extData) { + return false // return false when ERROR + } + // [UTLS SECTION END] + // Ignore unknown extensions. + continue + } + + if !extData.Empty() { + return false + } + } + + return true +} + +type endOfEarlyDataMsg struct{} + +func (m *endOfEarlyDataMsg) marshal() ([]byte, error) { + x := make([]byte, 4) + x[0] = typeEndOfEarlyData + return x, nil +} + +func (m *endOfEarlyDataMsg) unmarshal(data []byte) bool { + return len(data) == 4 +} + +type keyUpdateMsg struct { + updateRequested bool +} + +func (m *keyUpdateMsg) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeKeyUpdate) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + if m.updateRequested { + b.AddUint8(1) + } else { + b.AddUint8(0) + } + }) + + return b.Bytes() +} + +func (m *keyUpdateMsg) unmarshal(data []byte) bool { + s := cryptobyte.String(data) + + var updateRequested uint8 + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint8(&updateRequested) || !s.Empty() { + return false + } + switch updateRequested { + case 0: + m.updateRequested = false + case 1: + m.updateRequested = true + default: + return false + } + return true +} + +type newSessionTicketMsgTLS13 struct { + lifetime uint32 + ageAdd uint32 + nonce []byte + label []byte + maxEarlyData uint32 +} + +func (m *newSessionTicketMsgTLS13) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeNewSessionTicket) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint32(m.lifetime) + b.AddUint32(m.ageAdd) + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.nonce) + }) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.label) + }) + + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + if m.maxEarlyData > 0 { + b.AddUint16(extensionEarlyData) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint32(m.maxEarlyData) + }) + } + }) + }) + + return b.Bytes() +} + +func (m *newSessionTicketMsgTLS13) unmarshal(data []byte) bool { + *m = newSessionTicketMsgTLS13{} + s := cryptobyte.String(data) + + var extensions cryptobyte.String + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint32(&m.lifetime) || + !s.ReadUint32(&m.ageAdd) || + !readUint8LengthPrefixed(&s, &m.nonce) || + !readUint16LengthPrefixed(&s, &m.label) || + !s.ReadUint16LengthPrefixed(&extensions) || + !s.Empty() { + return false + } + + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return false + } + + switch extension { + case extensionEarlyData: + if !extData.ReadUint32(&m.maxEarlyData) { + return false + } + default: + // Ignore unknown extensions. + continue + } + + if !extData.Empty() { + return false + } + } + + return true +} + +type certificateRequestMsgTLS13 struct { + original []byte // [uTLS] + ocspStapling bool + scts bool + supportedSignatureAlgorithms []SignatureScheme + supportedSignatureAlgorithmsCert []SignatureScheme + certificateAuthorities [][]byte +} + +func (m *certificateRequestMsgTLS13) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeCertificateRequest) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + // certificate_request_context (SHALL be zero length unless used for + // post-handshake authentication) + b.AddUint8(0) + + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + if m.ocspStapling { + b.AddUint16(extensionStatusRequest) + b.AddUint16(0) // empty extension_data + } + if m.scts { + // RFC 8446, Section 4.4.2.1 makes no mention of + // signed_certificate_timestamp in CertificateRequest, but + // "Extensions in the Certificate message from the client MUST + // correspond to extensions in the CertificateRequest message + // from the server." and it appears in the table in Section 4.2. + b.AddUint16(extensionSCT) + b.AddUint16(0) // empty extension_data + } + if len(m.supportedSignatureAlgorithms) > 0 { + b.AddUint16(extensionSignatureAlgorithms) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + for _, sigAlgo := range m.supportedSignatureAlgorithms { + b.AddUint16(uint16(sigAlgo)) + } + }) + }) + } + if len(m.supportedSignatureAlgorithmsCert) > 0 { + b.AddUint16(extensionSignatureAlgorithmsCert) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + for _, sigAlgo := range m.supportedSignatureAlgorithmsCert { + b.AddUint16(uint16(sigAlgo)) + } + }) + }) + } + if len(m.certificateAuthorities) > 0 { + b.AddUint16(extensionCertificateAuthorities) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + for _, ca := range m.certificateAuthorities { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(ca) + }) + } + }) + }) + } + }) + }) + + return b.Bytes() +} + +func (m *certificateRequestMsgTLS13) unmarshal(data []byte) bool { + *m = certificateRequestMsgTLS13{original: data} // [uTLS] + s := cryptobyte.String(data) + + var context, extensions cryptobyte.String + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint8LengthPrefixed(&context) || !context.Empty() || + !s.ReadUint16LengthPrefixed(&extensions) || + !s.Empty() { + return false + } + + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return false + } + + switch extension { + case extensionStatusRequest: + m.ocspStapling = true + case extensionSCT: + m.scts = true + case extensionSignatureAlgorithms: + var sigAndAlgs cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sigAndAlgs) || sigAndAlgs.Empty() { + return false + } + for !sigAndAlgs.Empty() { + var sigAndAlg uint16 + if !sigAndAlgs.ReadUint16(&sigAndAlg) { + return false + } + m.supportedSignatureAlgorithms = append( + m.supportedSignatureAlgorithms, SignatureScheme(sigAndAlg)) + } + case extensionSignatureAlgorithmsCert: + var sigAndAlgs cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sigAndAlgs) || sigAndAlgs.Empty() { + return false + } + for !sigAndAlgs.Empty() { + var sigAndAlg uint16 + if !sigAndAlgs.ReadUint16(&sigAndAlg) { + return false + } + m.supportedSignatureAlgorithmsCert = append( + m.supportedSignatureAlgorithmsCert, SignatureScheme(sigAndAlg)) + } + case extensionCertificateAuthorities: + var auths cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&auths) || auths.Empty() { + return false + } + for !auths.Empty() { + var ca []byte + if !readUint16LengthPrefixed(&auths, &ca) || len(ca) == 0 { + return false + } + m.certificateAuthorities = append(m.certificateAuthorities, ca) + } + default: + // Ignore unknown extensions. + continue + } + + if !extData.Empty() { + return false + } + } + + return true +} + +// [UTLS SECTION BEGINS] +func (m *certificateRequestMsgTLS13) originalBytes() []byte { + return m.original +} + +// [UTLS SECTION ENDS] + +type certificateMsg struct { + certificates [][]byte +} + +func (m *certificateMsg) marshal() ([]byte, error) { + var i int + for _, slice := range m.certificates { + i += len(slice) + } + + length := 3 + 3*len(m.certificates) + i + x := make([]byte, 4+length) + x[0] = typeCertificate + x[1] = uint8(length >> 16) + x[2] = uint8(length >> 8) + x[3] = uint8(length) + + certificateOctets := length - 3 + x[4] = uint8(certificateOctets >> 16) + x[5] = uint8(certificateOctets >> 8) + x[6] = uint8(certificateOctets) + + y := x[7:] + for _, slice := range m.certificates { + y[0] = uint8(len(slice) >> 16) + y[1] = uint8(len(slice) >> 8) + y[2] = uint8(len(slice)) + copy(y[3:], slice) + y = y[3+len(slice):] + } + + return x, nil +} + +func (m *certificateMsg) unmarshal(data []byte) bool { + if len(data) < 7 { + return false + } + + certsLen := uint32(data[4])<<16 | uint32(data[5])<<8 | uint32(data[6]) + if uint32(len(data)) != certsLen+7 { + return false + } + + numCerts := 0 + d := data[7:] + for certsLen > 0 { + if len(d) < 4 { + return false + } + certLen := uint32(d[0])<<16 | uint32(d[1])<<8 | uint32(d[2]) + if uint32(len(d)) < 3+certLen { + return false + } + d = d[3+certLen:] + certsLen -= 3 + certLen + numCerts++ + } + + m.certificates = make([][]byte, numCerts) + d = data[7:] + for i := 0; i < numCerts; i++ { + certLen := uint32(d[0])<<16 | uint32(d[1])<<8 | uint32(d[2]) + m.certificates[i] = d[3 : 3+certLen] + d = d[3+certLen:] + } + + return true +} + +type certificateMsgTLS13 struct { + certificate Certificate + ocspStapling bool + scts bool +} + +func (m *certificateMsgTLS13) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeCertificate) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint8(0) // certificate_request_context + + certificate := m.certificate + if !m.ocspStapling { + certificate.OCSPStaple = nil + } + if !m.scts { + certificate.SignedCertificateTimestamps = nil + } + marshalCertificate(b, certificate) + }) + + return b.Bytes() +} + +func marshalCertificate(b *cryptobyte.Builder, certificate Certificate) { + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + for i, cert := range certificate.Certificate { + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(cert) + }) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + if i > 0 { + // This library only supports OCSP and SCT for leaf certificates. + return + } + if certificate.OCSPStaple != nil { + b.AddUint16(extensionStatusRequest) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint8(statusTypeOCSP) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(certificate.OCSPStaple) + }) + }) + } + if certificate.SignedCertificateTimestamps != nil { + b.AddUint16(extensionSCT) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + for _, sct := range certificate.SignedCertificateTimestamps { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(sct) + }) + } + }) + }) + } + }) + } + }) +} + +func (m *certificateMsgTLS13) unmarshal(data []byte) bool { + *m = certificateMsgTLS13{} + s := cryptobyte.String(data) + + var context cryptobyte.String + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint8LengthPrefixed(&context) || !context.Empty() || + !unmarshalCertificate(&s, &m.certificate) || + !s.Empty() { + return false + } + + m.scts = m.certificate.SignedCertificateTimestamps != nil + m.ocspStapling = m.certificate.OCSPStaple != nil + + return true +} + +func unmarshalCertificate(s *cryptobyte.String, certificate *Certificate) bool { + var certList cryptobyte.String + if !s.ReadUint24LengthPrefixed(&certList) { + return false + } + for !certList.Empty() { + var cert []byte + var extensions cryptobyte.String + if !readUint24LengthPrefixed(&certList, &cert) || + !certList.ReadUint16LengthPrefixed(&extensions) { + return false + } + certificate.Certificate = append(certificate.Certificate, cert) + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return false + } + if len(certificate.Certificate) > 1 { + // This library only supports OCSP and SCT for leaf certificates. + continue + } + + switch extension { + case extensionStatusRequest: + var statusType uint8 + if !extData.ReadUint8(&statusType) || statusType != statusTypeOCSP || + !readUint24LengthPrefixed(&extData, &certificate.OCSPStaple) || + len(certificate.OCSPStaple) == 0 { + return false + } + case extensionSCT: + var sctList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sctList) || sctList.Empty() { + return false + } + for !sctList.Empty() { + var sct []byte + if !readUint16LengthPrefixed(&sctList, &sct) || + len(sct) == 0 { + return false + } + certificate.SignedCertificateTimestamps = append( + certificate.SignedCertificateTimestamps, sct) + } + default: + // Ignore unknown extensions. + continue + } + + if !extData.Empty() { + return false + } + } + } + return true +} + +type serverKeyExchangeMsg struct { + key []byte +} + +func (m *serverKeyExchangeMsg) marshal() ([]byte, error) { + length := len(m.key) + x := make([]byte, length+4) + x[0] = typeServerKeyExchange + x[1] = uint8(length >> 16) + x[2] = uint8(length >> 8) + x[3] = uint8(length) + copy(x[4:], m.key) + + return x, nil +} + +func (m *serverKeyExchangeMsg) unmarshal(data []byte) bool { + if len(data) < 4 { + return false + } + m.key = data[4:] + return true +} + +type certificateStatusMsg struct { + response []byte +} + +func (m *certificateStatusMsg) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeCertificateStatus) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint8(statusTypeOCSP) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.response) + }) + }) + + return b.Bytes() +} + +func (m *certificateStatusMsg) unmarshal(data []byte) bool { + s := cryptobyte.String(data) + + var statusType uint8 + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint8(&statusType) || statusType != statusTypeOCSP || + !readUint24LengthPrefixed(&s, &m.response) || + len(m.response) == 0 || !s.Empty() { + return false + } + return true +} + +type serverHelloDoneMsg struct{} + +func (m *serverHelloDoneMsg) marshal() ([]byte, error) { + x := make([]byte, 4) + x[0] = typeServerHelloDone + return x, nil +} + +func (m *serverHelloDoneMsg) unmarshal(data []byte) bool { + return len(data) == 4 +} + +type clientKeyExchangeMsg struct { + ciphertext []byte +} + +func (m *clientKeyExchangeMsg) marshal() ([]byte, error) { + length := len(m.ciphertext) + x := make([]byte, length+4) + x[0] = typeClientKeyExchange + x[1] = uint8(length >> 16) + x[2] = uint8(length >> 8) + x[3] = uint8(length) + copy(x[4:], m.ciphertext) + + return x, nil +} + +func (m *clientKeyExchangeMsg) unmarshal(data []byte) bool { + if len(data) < 4 { + return false + } + l := int(data[1])<<16 | int(data[2])<<8 | int(data[3]) + if l != len(data)-4 { + return false + } + m.ciphertext = data[4:] + return true +} + +type finishedMsg struct { + verifyData []byte +} + +func (m *finishedMsg) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeFinished) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.verifyData) + }) + + return b.Bytes() +} + +func (m *finishedMsg) unmarshal(data []byte) bool { + s := cryptobyte.String(data) + return s.Skip(1) && + readUint24LengthPrefixed(&s, &m.verifyData) && + s.Empty() +} + +type certificateRequestMsg struct { + // hasSignatureAlgorithm indicates whether this message includes a list of + // supported signature algorithms. This change was introduced with TLS 1.2. + hasSignatureAlgorithm bool + + certificateTypes []byte + supportedSignatureAlgorithms []SignatureScheme + certificateAuthorities [][]byte +} + +func (m *certificateRequestMsg) marshal() ([]byte, error) { + // See RFC 4346, Section 7.4.4. + length := 1 + len(m.certificateTypes) + 2 + casLength := 0 + for _, ca := range m.certificateAuthorities { + casLength += 2 + len(ca) + } + length += casLength + + if m.hasSignatureAlgorithm { + length += 2 + 2*len(m.supportedSignatureAlgorithms) + } + + x := make([]byte, 4+length) + x[0] = typeCertificateRequest + x[1] = uint8(length >> 16) + x[2] = uint8(length >> 8) + x[3] = uint8(length) + + x[4] = uint8(len(m.certificateTypes)) + + copy(x[5:], m.certificateTypes) + y := x[5+len(m.certificateTypes):] + + if m.hasSignatureAlgorithm { + n := len(m.supportedSignatureAlgorithms) * 2 + y[0] = uint8(n >> 8) + y[1] = uint8(n) + y = y[2:] + for _, sigAlgo := range m.supportedSignatureAlgorithms { + y[0] = uint8(sigAlgo >> 8) + y[1] = uint8(sigAlgo) + y = y[2:] + } + } + + y[0] = uint8(casLength >> 8) + y[1] = uint8(casLength) + y = y[2:] + for _, ca := range m.certificateAuthorities { + y[0] = uint8(len(ca) >> 8) + y[1] = uint8(len(ca)) + y = y[2:] + copy(y, ca) + y = y[len(ca):] + } + + return x, nil +} + +func (m *certificateRequestMsg) unmarshal(data []byte) bool { + if len(data) < 5 { + return false + } + + length := uint32(data[1])<<16 | uint32(data[2])<<8 | uint32(data[3]) + if uint32(len(data))-4 != length { + return false + } + + numCertTypes := int(data[4]) + data = data[5:] + if numCertTypes == 0 || len(data) <= numCertTypes { + return false + } + + m.certificateTypes = make([]byte, numCertTypes) + if copy(m.certificateTypes, data) != numCertTypes { + return false + } + + data = data[numCertTypes:] + + if m.hasSignatureAlgorithm { + if len(data) < 2 { + return false + } + sigAndHashLen := uint16(data[0])<<8 | uint16(data[1]) + data = data[2:] + if sigAndHashLen&1 != 0 { + return false + } + if len(data) < int(sigAndHashLen) { + return false + } + numSigAlgos := sigAndHashLen / 2 + m.supportedSignatureAlgorithms = make([]SignatureScheme, numSigAlgos) + for i := range m.supportedSignatureAlgorithms { + m.supportedSignatureAlgorithms[i] = SignatureScheme(data[0])<<8 | SignatureScheme(data[1]) + data = data[2:] + } + } + + if len(data) < 2 { + return false + } + casLength := uint16(data[0])<<8 | uint16(data[1]) + data = data[2:] + if len(data) < int(casLength) { + return false + } + cas := make([]byte, casLength) + copy(cas, data) + data = data[casLength:] + + m.certificateAuthorities = nil + for len(cas) > 0 { + if len(cas) < 2 { + return false + } + caLen := uint16(cas[0])<<8 | uint16(cas[1]) + cas = cas[2:] + + if len(cas) < int(caLen) { + return false + } + + m.certificateAuthorities = append(m.certificateAuthorities, cas[:caLen]) + cas = cas[caLen:] + } + + return len(data) == 0 +} + +type certificateVerifyMsg struct { + hasSignatureAlgorithm bool // format change introduced in TLS 1.2 + signatureAlgorithm SignatureScheme + signature []byte +} + +func (m *certificateVerifyMsg) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeCertificateVerify) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + if m.hasSignatureAlgorithm { + b.AddUint16(uint16(m.signatureAlgorithm)) + } + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.signature) + }) + }) + + return b.Bytes() +} + +func (m *certificateVerifyMsg) unmarshal(data []byte) bool { + s := cryptobyte.String(data) + + if !s.Skip(4) { // message type and uint24 length field + return false + } + if m.hasSignatureAlgorithm { + if !s.ReadUint16((*uint16)(&m.signatureAlgorithm)) { + return false + } + } + return readUint16LengthPrefixed(&s, &m.signature) && s.Empty() +} + +type newSessionTicketMsg struct { + ticket []byte +} + +func (m *newSessionTicketMsg) marshal() ([]byte, error) { + // See RFC 5077, Section 3.3. + ticketLen := len(m.ticket) + length := 2 + 4 + ticketLen + x := make([]byte, 4+length) + x[0] = typeNewSessionTicket + x[1] = uint8(length >> 16) + x[2] = uint8(length >> 8) + x[3] = uint8(length) + x[8] = uint8(ticketLen >> 8) + x[9] = uint8(ticketLen) + copy(x[10:], m.ticket) + + return x, nil +} + +func (m *newSessionTicketMsg) unmarshal(data []byte) bool { + if len(data) < 10 { + return false + } + + length := uint32(data[1])<<16 | uint32(data[2])<<8 | uint32(data[3]) + if uint32(len(data))-4 != length { + return false + } + + ticketLen := int(data[8])<<8 + int(data[9]) + if len(data)-10 != ticketLen { + return false + } + + m.ticket = data[10:] + + return true +} + +type helloRequestMsg struct { +} + +func (*helloRequestMsg) marshal() ([]byte, error) { + return []byte{typeHelloRequest, 0, 0, 0}, nil +} + +func (*helloRequestMsg) unmarshal(data []byte) bool { + return len(data) == 4 +} + +type transcriptHash interface { + Write([]byte) (int, error) +} + +// transcriptMsg is a helper used to hash messages which are not hashed when +// they are read from, or written to, the wire. This is typically the case for +// messages which are either not sent, or need to be hashed out of order from +// when they are read/written. +// +// For most messages, the message is marshalled using their marshal method, +// since their wire representation is idempotent. For clientHelloMsg and +// serverHelloMsg, we store the original wire representation of the message and +// use that for hashing, since unmarshal/marshal are not idempotent due to +// extension ordering and other malleable fields, which may cause differences +// between what was received and what we marshal. +func transcriptMsg(msg handshakeMessage, h transcriptHash) error { + if msgWithOrig, ok := msg.(handshakeMessageWithOriginalBytes); ok { + if orig := msgWithOrig.originalBytes(); orig != nil { + h.Write(msgWithOrig.originalBytes()) + return nil + } + } + + data, err := msg.marshal() + if err != nil { + return err + } + h.Write(data) + return nil +} diff --git a/backend/vendor/github.com/enetx/utls/handshake_server.go b/backend/vendor/github.com/enetx/utls/handshake_server.go new file mode 100644 index 0000000..75f239d --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/handshake_server.go @@ -0,0 +1,1009 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "context" + "crypto" + "crypto/ecdsa" + "crypto/ed25519" + "crypto/rsa" + "crypto/subtle" + "crypto/x509" + "errors" + "fmt" + "hash" + "io" + "time" + + "github.com/enetx/utls/internal/byteorder" +) + +// serverHandshakeState contains details of a server handshake in progress. +// It's discarded once the handshake has completed. +type serverHandshakeState struct { + c *Conn + ctx context.Context + clientHello *clientHelloMsg + hello *serverHelloMsg + suite *cipherSuite + ecdheOk bool + ecSignOk bool + rsaDecryptOk bool + rsaSignOk bool + sessionState *SessionState + finishedHash finishedHash + masterSecret []byte + cert *Certificate +} + +// serverHandshake performs a TLS handshake as a server. +func (c *Conn) serverHandshake(ctx context.Context) error { + clientHello, ech, err := c.readClientHello(ctx) + if err != nil { + return err + } + + if c.vers == VersionTLS13 { + hs := serverHandshakeStateTLS13{ + c: c, + ctx: ctx, + clientHello: clientHello, + echContext: ech, + } + return hs.handshake() + } + + hs := serverHandshakeState{ + c: c, + ctx: ctx, + clientHello: clientHello, + } + return hs.handshake() +} + +func (hs *serverHandshakeState) handshake() error { + c := hs.c + + if err := hs.processClientHello(); err != nil { + return err + } + + // For an overview of TLS handshaking, see RFC 5246, Section 7.3. + c.buffering = true + if err := hs.checkForResumption(); err != nil { + return err + } + if hs.sessionState != nil { + // The client has included a session ticket and so we do an abbreviated handshake. + c.didResume = true + if err := hs.doResumeHandshake(); err != nil { + return err + } + if err := hs.establishKeys(); err != nil { + return err + } + if err := hs.sendSessionTicket(); err != nil { + return err + } + if err := hs.sendFinished(c.serverFinished[:]); err != nil { + return err + } + if _, err := c.flush(); err != nil { + return err + } + c.clientFinishedIsFirst = false + if err := hs.readFinished(nil); err != nil { + return err + } + } else { + // The client didn't include a session ticket, or it wasn't + // valid so we do a full handshake. + if err := hs.pickCipherSuite(); err != nil { + return err + } + if err := hs.doFullHandshake(); err != nil { + return err + } + if err := hs.establishKeys(); err != nil { + return err + } + if err := hs.readFinished(c.clientFinished[:]); err != nil { + return err + } + c.clientFinishedIsFirst = true + c.buffering = true + if err := hs.sendSessionTicket(); err != nil { + return err + } + if err := hs.sendFinished(nil); err != nil { + return err + } + if _, err := c.flush(); err != nil { + return err + } + } + + c.ekm = ekmFromMasterSecret(c.vers, hs.suite, hs.masterSecret, hs.clientHello.random, hs.hello.random) + c.isHandshakeComplete.Store(true) + + return nil +} + +// readClientHello reads a ClientHello message and selects the protocol version. +func (c *Conn) readClientHello(ctx context.Context) (*clientHelloMsg, *echServerContext, error) { + // clientHelloMsg is included in the transcript, but we haven't initialized + // it yet. The respective handshake functions will record it themselves. + msg, err := c.readHandshake(nil) + if err != nil { + return nil, nil, err + } + clientHello, ok := msg.(*clientHelloMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return nil, nil, unexpectedMessageError(clientHello, msg) + } + + // ECH processing has to be done before we do any other negotiation based on + // the contents of the client hello, since we may swap it out completely. + var ech *echServerContext + if len(clientHello.encryptedClientHello) != 0 { + clientHello, ech, err = c.processECHClientHello(clientHello) + if err != nil { + return nil, nil, err + } + } + + var configForClient *Config + originalConfig := c.config + if c.config.GetConfigForClient != nil { + chi := clientHelloInfo(ctx, c, clientHello) + if configForClient, err = c.config.GetConfigForClient(chi); err != nil { + c.sendAlert(alertInternalError) + return nil, nil, err + } else if configForClient != nil { + c.config = configForClient + } + } + c.ticketKeys = originalConfig.ticketKeys(configForClient) + + clientVersions := clientHello.supportedVersions + if len(clientHello.supportedVersions) == 0 { + clientVersions = supportedVersionsFromMax(clientHello.vers) + } + c.vers, ok = c.config.mutualVersion(roleServer, clientVersions) + if !ok { + c.sendAlert(alertProtocolVersion) + return nil, nil, fmt.Errorf("tls: client offered only unsupported versions: %x", clientVersions) + } + c.haveVers = true + c.in.version = c.vers + c.out.version = c.vers + + // This check reflects some odd specification implied behavior. Client-facing servers + // are supposed to reject hellos with outer ECH and inner ECH that offers 1.2, but + // backend servers are allowed to accept hellos with inner ECH that offer 1.2, since + // they cannot expect client-facing servers to behave properly. Since we act as both + // a client-facing and backend server, we only enforce 1.3 being negotiated if we + // saw a hello with outer ECH first. The spec probably should've made this an error, + // but it didn't, and this matches the boringssl behavior. + if c.vers != VersionTLS13 && (ech != nil && !ech.inner) { + c.sendAlert(alertIllegalParameter) + return nil, nil, errors.New("tls: Encrypted Client Hello cannot be used pre-TLS 1.3") + } + + // [UTLS SECTION BEGIN] + // Disable unsupported godebug package + // if c.config.MinVersion == 0 && c.vers < VersionTLS12 { + // tls10server.Value() // ensure godebug is initialized + // tls10server.IncNonDefault() + // } + // [UTLS SECTION END] + + return clientHello, ech, nil +} + +func (hs *serverHandshakeState) processClientHello() error { + c := hs.c + + hs.hello = new(serverHelloMsg) + hs.hello.vers = c.vers + + foundCompression := false + // We only support null compression, so check that the client offered it. + for _, compression := range hs.clientHello.compressionMethods { + if compression == compressionNone { + foundCompression = true + break + } + } + + if !foundCompression { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: client does not support uncompressed connections") + } + + hs.hello.random = make([]byte, 32) + serverRandom := hs.hello.random + // Downgrade protection canaries. See RFC 8446, Section 4.1.3. + maxVers := c.config.maxSupportedVersion(roleServer) + if maxVers >= VersionTLS12 && c.vers < maxVers || testingOnlyForceDowngradeCanary { + if c.vers == VersionTLS12 { + copy(serverRandom[24:], downgradeCanaryTLS12) + } else { + copy(serverRandom[24:], downgradeCanaryTLS11) + } + serverRandom = serverRandom[:24] + } + _, err := io.ReadFull(c.config.rand(), serverRandom) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + + if len(hs.clientHello.secureRenegotiation) != 0 { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: initial handshake had non-empty renegotiation extension") + } + + hs.hello.extendedMasterSecret = hs.clientHello.extendedMasterSecret + hs.hello.secureRenegotiationSupported = hs.clientHello.secureRenegotiationSupported + hs.hello.compressionMethod = compressionNone + if len(hs.clientHello.serverName) > 0 { + c.serverName = hs.clientHello.serverName + } + + selectedProto, err := negotiateALPN(c.config.NextProtos, hs.clientHello.alpnProtocols, false) + if err != nil { + c.sendAlert(alertNoApplicationProtocol) + return err + } + hs.hello.alpnProtocol = selectedProto + c.clientProtocol = selectedProto + + hs.cert, err = c.config.getCertificate(clientHelloInfo(hs.ctx, c, hs.clientHello)) + if err != nil { + if err == errNoCertificates { + c.sendAlert(alertUnrecognizedName) + } else { + c.sendAlert(alertInternalError) + } + return err + } + if hs.clientHello.scts { + hs.hello.scts = hs.cert.SignedCertificateTimestamps + } + + hs.ecdheOk = supportsECDHE(c.config, c.vers, hs.clientHello.supportedCurves, hs.clientHello.supportedPoints) + + if hs.ecdheOk && len(hs.clientHello.supportedPoints) > 0 { + // Although omitting the ec_point_formats extension is permitted, some + // old OpenSSL version will refuse to handshake if not present. + // + // Per RFC 4492, section 5.1.2, implementations MUST support the + // uncompressed point format. See golang.org/issue/31943. + hs.hello.supportedPoints = []uint8{pointFormatUncompressed} + } + + if priv, ok := hs.cert.PrivateKey.(crypto.Signer); ok { + switch priv.Public().(type) { + case *ecdsa.PublicKey: + hs.ecSignOk = true + case ed25519.PublicKey: + hs.ecSignOk = true + case *rsa.PublicKey: + hs.rsaSignOk = true + default: + c.sendAlert(alertInternalError) + return fmt.Errorf("tls: unsupported signing key type (%T)", priv.Public()) + } + } + if priv, ok := hs.cert.PrivateKey.(crypto.Decrypter); ok { + switch priv.Public().(type) { + case *rsa.PublicKey: + hs.rsaDecryptOk = true + default: + c.sendAlert(alertInternalError) + return fmt.Errorf("tls: unsupported decryption key type (%T)", priv.Public()) + } + } + + return nil +} + +// negotiateALPN picks a shared ALPN protocol that both sides support in server +// preference order. If ALPN is not configured or the peer doesn't support it, +// it returns "" and no error. +func negotiateALPN(serverProtos, clientProtos []string, quic bool) (string, error) { + if len(serverProtos) == 0 || len(clientProtos) == 0 { + if quic && len(serverProtos) != 0 { + // RFC 9001, Section 8.1 + return "", fmt.Errorf("tls: client did not request an application protocol") + } + return "", nil + } + var http11fallback bool + for _, s := range serverProtos { + for _, c := range clientProtos { + if s == c { + return s, nil + } + if s == "h2" && c == "http/1.1" { + http11fallback = true + } + } + } + // As a special case, let http/1.1 clients connect to h2 servers as if they + // didn't support ALPN. We used not to enforce protocol overlap, so over + // time a number of HTTP servers were configured with only "h2", but + // expected to accept connections from "http/1.1" clients. See Issue 46310. + if http11fallback { + return "", nil + } + return "", fmt.Errorf("tls: client requested unsupported application protocols (%s)", clientProtos) +} + +// supportsECDHE returns whether ECDHE key exchanges can be used with this +// pre-TLS 1.3 client. +func supportsECDHE(c *Config, version uint16, supportedCurves []CurveID, supportedPoints []uint8) bool { + supportsCurve := false + for _, curve := range supportedCurves { + if c.supportsCurve(version, curve) { + supportsCurve = true + break + } + } + + supportsPointFormat := false + for _, pointFormat := range supportedPoints { + if pointFormat == pointFormatUncompressed { + supportsPointFormat = true + break + } + } + // Per RFC 8422, Section 5.1.2, if the Supported Point Formats extension is + // missing, uncompressed points are supported. If supportedPoints is empty, + // the extension must be missing, as an empty extension body is rejected by + // the parser. See https://go.dev/issue/49126. + if len(supportedPoints) == 0 { + supportsPointFormat = true + } + + return supportsCurve && supportsPointFormat +} + +func (hs *serverHandshakeState) pickCipherSuite() error { + c := hs.c + + preferenceOrder := cipherSuitesPreferenceOrder + if !hasAESGCMHardwareSupport || !aesgcmPreferred(hs.clientHello.cipherSuites) { + preferenceOrder = cipherSuitesPreferenceOrderNoAES + } + + configCipherSuites := c.config.cipherSuites() + preferenceList := make([]uint16, 0, len(configCipherSuites)) + for _, suiteID := range preferenceOrder { + for _, id := range configCipherSuites { + if id == suiteID { + preferenceList = append(preferenceList, id) + break + } + } + } + + hs.suite = selectCipherSuite(preferenceList, hs.clientHello.cipherSuites, hs.cipherSuiteOk) + if hs.suite == nil { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: no cipher suite supported by both client and server") + } + c.cipherSuite = hs.suite.id + + // [UTLS SECTION BEGIN] + // Disable unsupported godebug package + // if c.config.CipherSuites == nil && !fips140tls.Required() && rsaKexCiphers[hs.suite.id] { + // tlsrsakex.Value() // ensure godebug is initialized + // tlsrsakex.IncNonDefault() + // } + // if c.config.CipherSuites == nil && !fips140tls.Required() && tdesCiphers[hs.suite.id] { + // tls3des.Value() // ensure godebug is initialized + // tls3des.IncNonDefault() + // } + // [UTLS SECTION END] + + for _, id := range hs.clientHello.cipherSuites { + if id == TLS_FALLBACK_SCSV { + // The client is doing a fallback connection. See RFC 7507. + if hs.clientHello.vers < c.config.maxSupportedVersion(roleServer) { + c.sendAlert(alertInappropriateFallback) + return errors.New("tls: client using inappropriate protocol fallback") + } + break + } + } + + return nil +} + +func (hs *serverHandshakeState) cipherSuiteOk(c *cipherSuite) bool { + if c.flags&suiteECDHE != 0 { + if !hs.ecdheOk { + return false + } + if c.flags&suiteECSign != 0 { + if !hs.ecSignOk { + return false + } + } else if !hs.rsaSignOk { + return false + } + } else if !hs.rsaDecryptOk { + return false + } + if hs.c.vers < VersionTLS12 && c.flags&suiteTLS12 != 0 { + return false + } + return true +} + +// checkForResumption reports whether we should perform resumption on this connection. +func (hs *serverHandshakeState) checkForResumption() error { + c := hs.c + + if c.config.SessionTicketsDisabled { + return nil + } + + var sessionState *SessionState + if c.config.UnwrapSession != nil { + ss, err := c.config.UnwrapSession(hs.clientHello.sessionTicket, c.connectionStateLocked()) + if err != nil { + return err + } + if ss == nil { + return nil + } + sessionState = ss + } else { + plaintext := c.config.decryptTicket(hs.clientHello.sessionTicket, c.ticketKeys) + if plaintext == nil { + return nil + } + ss, err := ParseSessionState(plaintext) + if err != nil { + return nil + } + sessionState = ss + } + + // TLS 1.2 tickets don't natively have a lifetime, but we want to avoid + // re-wrapping the same master secret in different tickets over and over for + // too long, weakening forward secrecy. + createdAt := time.Unix(int64(sessionState.createdAt), 0) + if c.config.time().Sub(createdAt) > maxSessionTicketLifetime { + return nil + } + + // Never resume a session for a different TLS version. + if c.vers != sessionState.version { + return nil + } + + cipherSuiteOk := false + // Check that the client is still offering the ciphersuite in the session. + for _, id := range hs.clientHello.cipherSuites { + if id == sessionState.cipherSuite { + cipherSuiteOk = true + break + } + } + if !cipherSuiteOk { + return nil + } + + // Check that we also support the ciphersuite from the session. + suite := selectCipherSuite([]uint16{sessionState.cipherSuite}, + c.config.cipherSuites(), hs.cipherSuiteOk) + if suite == nil { + return nil + } + + sessionHasClientCerts := len(sessionState.peerCertificates) != 0 + needClientCerts := requiresClientCert(c.config.ClientAuth) + if needClientCerts && !sessionHasClientCerts { + return nil + } + if sessionHasClientCerts && c.config.ClientAuth == NoClientCert { + return nil + } + if sessionHasClientCerts && c.config.time().After(sessionState.peerCertificates[0].NotAfter) { + return nil + } + if sessionHasClientCerts && c.config.ClientAuth >= VerifyClientCertIfGiven && + len(sessionState.verifiedChains) == 0 { + return nil + } + + // RFC 7627, Section 5.3 + if !sessionState.extMasterSecret && hs.clientHello.extendedMasterSecret { + return nil + } + if sessionState.extMasterSecret && !hs.clientHello.extendedMasterSecret { + // Aborting is somewhat harsh, but it's a MUST and it would indicate a + // weird downgrade in client capabilities. + return errors.New("tls: session supported extended_master_secret but client does not") + } + + c.peerCertificates = sessionState.peerCertificates + c.ocspResponse = sessionState.ocspResponse + c.scts = sessionState.scts + c.verifiedChains = sessionState.verifiedChains + c.extMasterSecret = sessionState.extMasterSecret + hs.sessionState = sessionState + hs.suite = suite + c.didResume = true + return nil +} + +func (hs *serverHandshakeState) doResumeHandshake() error { + c := hs.c + + hs.hello.cipherSuite = hs.suite.id + c.cipherSuite = hs.suite.id + // We echo the client's session ID in the ServerHello to let it know + // that we're doing a resumption. + hs.hello.sessionId = hs.clientHello.sessionId + // We always send a new session ticket, even if it wraps the same master + // secret and it's potentially encrypted with the same key, to help the + // client avoid cross-connection tracking from a network observer. + hs.hello.ticketSupported = true + hs.finishedHash = newFinishedHash(c.vers, hs.suite) + hs.finishedHash.discardHandshakeBuffer() + if err := transcriptMsg(hs.clientHello, &hs.finishedHash); err != nil { + return err + } + if _, err := hs.c.writeHandshakeRecord(hs.hello, &hs.finishedHash); err != nil { + return err + } + + if c.config.VerifyConnection != nil { + if err := c.config.VerifyConnection(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + + hs.masterSecret = hs.sessionState.secret + + return nil +} + +func (hs *serverHandshakeState) doFullHandshake() error { + c := hs.c + + if hs.clientHello.ocspStapling && len(hs.cert.OCSPStaple) > 0 { + hs.hello.ocspStapling = true + } + + hs.hello.ticketSupported = hs.clientHello.ticketSupported && !c.config.SessionTicketsDisabled + hs.hello.cipherSuite = hs.suite.id + + hs.finishedHash = newFinishedHash(hs.c.vers, hs.suite) + if c.config.ClientAuth == NoClientCert { + // No need to keep a full record of the handshake if client + // certificates won't be used. + hs.finishedHash.discardHandshakeBuffer() + } + if err := transcriptMsg(hs.clientHello, &hs.finishedHash); err != nil { + return err + } + if _, err := hs.c.writeHandshakeRecord(hs.hello, &hs.finishedHash); err != nil { + return err + } + + certMsg := new(certificateMsg) + certMsg.certificates = hs.cert.Certificate + if _, err := hs.c.writeHandshakeRecord(certMsg, &hs.finishedHash); err != nil { + return err + } + + if hs.hello.ocspStapling { + certStatus := new(certificateStatusMsg) + certStatus.response = hs.cert.OCSPStaple + if _, err := hs.c.writeHandshakeRecord(certStatus, &hs.finishedHash); err != nil { + return err + } + } + + keyAgreement := hs.suite.ka(c.vers) + skx, err := keyAgreement.generateServerKeyExchange(c.config, hs.cert, hs.clientHello, hs.hello) + if err != nil { + c.sendAlert(alertHandshakeFailure) + return err + } + if skx != nil { + if len(skx.key) >= 3 && skx.key[0] == 3 /* named curve */ { + c.curveID = CurveID(byteorder.BEUint16(skx.key[1:])) + } + if _, err := hs.c.writeHandshakeRecord(skx, &hs.finishedHash); err != nil { + return err + } + } + + var certReq *certificateRequestMsg + if c.config.ClientAuth >= RequestClientCert { + // Request a client certificate + certReq = new(certificateRequestMsg) + certReq.certificateTypes = []byte{ + byte(certTypeRSASign), + byte(certTypeECDSASign), + } + if c.vers >= VersionTLS12 { + certReq.hasSignatureAlgorithm = true + certReq.supportedSignatureAlgorithms = supportedSignatureAlgorithms() + } + + // An empty list of certificateAuthorities signals to + // the client that it may send any certificate in response + // to our request. When we know the CAs we trust, then + // we can send them down, so that the client can choose + // an appropriate certificate to give to us. + if c.config.ClientCAs != nil { + certReq.certificateAuthorities = c.config.ClientCAs.Subjects() + } + if _, err := hs.c.writeHandshakeRecord(certReq, &hs.finishedHash); err != nil { + return err + } + } + + helloDone := new(serverHelloDoneMsg) + if _, err := hs.c.writeHandshakeRecord(helloDone, &hs.finishedHash); err != nil { + return err + } + + if _, err := c.flush(); err != nil { + return err + } + + var pub crypto.PublicKey // public key for client auth, if any + + msg, err := c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + + // If we requested a client certificate, then the client must send a + // certificate message, even if it's empty. + if c.config.ClientAuth >= RequestClientCert { + certMsg, ok := msg.(*certificateMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(certMsg, msg) + } + + if err := c.processCertsFromClient(Certificate{ + Certificate: certMsg.certificates, + }); err != nil { + return err + } + if len(certMsg.certificates) != 0 { + pub = c.peerCertificates[0].PublicKey + } + + msg, err = c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + } + if c.config.VerifyConnection != nil { + if err := c.config.VerifyConnection(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + + // Get client key exchange + ckx, ok := msg.(*clientKeyExchangeMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(ckx, msg) + } + + preMasterSecret, err := keyAgreement.processClientKeyExchange(c.config, hs.cert, ckx, c.vers) + if err != nil { + c.sendAlert(alertIllegalParameter) + return err + } + if hs.hello.extendedMasterSecret { + c.extMasterSecret = true + hs.masterSecret = extMasterFromPreMasterSecret(c.vers, hs.suite, preMasterSecret, + hs.finishedHash.Sum()) + } else { + hs.masterSecret = masterFromPreMasterSecret(c.vers, hs.suite, preMasterSecret, + hs.clientHello.random, hs.hello.random) + } + if err := c.config.writeKeyLog(keyLogLabelTLS12, hs.clientHello.random, hs.masterSecret); err != nil { + c.sendAlert(alertInternalError) + return err + } + + // If we received a client cert in response to our certificate request message, + // the client will send us a certificateVerifyMsg immediately after the + // clientKeyExchangeMsg. This message is a digest of all preceding + // handshake-layer messages that is signed using the private key corresponding + // to the client's certificate. This allows us to verify that the client is in + // possession of the private key of the certificate. + if len(c.peerCertificates) > 0 { + // certificateVerifyMsg is included in the transcript, but not until + // after we verify the handshake signature, since the state before + // this message was sent is used. + msg, err = c.readHandshake(nil) + if err != nil { + return err + } + certVerify, ok := msg.(*certificateVerifyMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(certVerify, msg) + } + + var sigType uint8 + var sigHash crypto.Hash + if c.vers >= VersionTLS12 { + if !isSupportedSignatureAlgorithm(certVerify.signatureAlgorithm, certReq.supportedSignatureAlgorithms) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: client certificate used with invalid signature algorithm") + } + sigType, sigHash, err = typeAndHashFromSignatureScheme(certVerify.signatureAlgorithm) + if err != nil { + return c.sendAlert(alertInternalError) + } + } else { + sigType, sigHash, err = legacyTypeAndHashFromPublicKey(pub) + if err != nil { + c.sendAlert(alertIllegalParameter) + return err + } + } + + signed := hs.finishedHash.hashForClientCertificate(sigType, sigHash) + if err := verifyHandshakeSignature(sigType, pub, sigHash, signed, certVerify.signature); err != nil { + c.sendAlert(alertDecryptError) + return errors.New("tls: invalid signature by the client certificate: " + err.Error()) + } + + if err := transcriptMsg(certVerify, &hs.finishedHash); err != nil { + return err + } + } + + hs.finishedHash.discardHandshakeBuffer() + + return nil +} + +func (hs *serverHandshakeState) establishKeys() error { + c := hs.c + + clientMAC, serverMAC, clientKey, serverKey, clientIV, serverIV := + keysFromMasterSecret(c.vers, hs.suite, hs.masterSecret, hs.clientHello.random, hs.hello.random, hs.suite.macLen, hs.suite.keyLen, hs.suite.ivLen) + + var clientCipher, serverCipher any + var clientHash, serverHash hash.Hash + + if hs.suite.aead == nil { + clientCipher = hs.suite.cipher(clientKey, clientIV, true /* for reading */) + clientHash = hs.suite.mac(clientMAC) + serverCipher = hs.suite.cipher(serverKey, serverIV, false /* not for reading */) + serverHash = hs.suite.mac(serverMAC) + } else { + clientCipher = hs.suite.aead(clientKey, clientIV) + serverCipher = hs.suite.aead(serverKey, serverIV) + } + + c.in.prepareCipherSpec(c.vers, clientCipher, clientHash) + c.out.prepareCipherSpec(c.vers, serverCipher, serverHash) + + return nil +} + +func (hs *serverHandshakeState) readFinished(out []byte) error { + c := hs.c + + if err := c.readChangeCipherSpec(); err != nil { + return err + } + + // finishedMsg is included in the transcript, but not until after we + // check the client version, since the state before this message was + // sent is used during verification. + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + clientFinished, ok := msg.(*finishedMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(clientFinished, msg) + } + + verify := hs.finishedHash.clientSum(hs.masterSecret) + if len(verify) != len(clientFinished.verifyData) || + subtle.ConstantTimeCompare(verify, clientFinished.verifyData) != 1 { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: client's Finished message is incorrect") + } + + if err := transcriptMsg(clientFinished, &hs.finishedHash); err != nil { + return err + } + + copy(out, verify) + return nil +} + +func (hs *serverHandshakeState) sendSessionTicket() error { + // ticketSupported is set in a resumption handshake if the + // ticket from the client was encrypted with an old session + // ticket key and thus a refreshed ticket should be sent. + if !hs.hello.ticketSupported { + return nil + } + + c := hs.c + m := new(newSessionTicketMsg) + + state := c.sessionState() + state.secret = hs.masterSecret + if hs.sessionState != nil { + // If this is re-wrapping an old key, then keep + // the original time it was created. + state.createdAt = hs.sessionState.createdAt + } + if c.config.WrapSession != nil { + var err error + m.ticket, err = c.config.WrapSession(c.connectionStateLocked(), state) + if err != nil { + return err + } + } else { + stateBytes, err := state.Bytes() + if err != nil { + return err + } + m.ticket, err = c.config.encryptTicket(stateBytes, c.ticketKeys) + if err != nil { + return err + } + } + + if _, err := hs.c.writeHandshakeRecord(m, &hs.finishedHash); err != nil { + return err + } + + return nil +} + +func (hs *serverHandshakeState) sendFinished(out []byte) error { + c := hs.c + + if err := c.writeChangeCipherRecord(); err != nil { + return err + } + + finished := new(finishedMsg) + finished.verifyData = hs.finishedHash.serverSum(hs.masterSecret) + if _, err := hs.c.writeHandshakeRecord(finished, &hs.finishedHash); err != nil { + return err + } + + copy(out, finished.verifyData) + + return nil +} + +// processCertsFromClient takes a chain of client certificates either from a +// Certificates message and verifies them. +func (c *Conn) processCertsFromClient(certificate Certificate) error { + certificates := certificate.Certificate + certs := make([]*x509.Certificate, len(certificates)) + var err error + for i, asn1Data := range certificates { + if certs[i], err = x509.ParseCertificate(asn1Data); err != nil { + c.sendAlert(alertBadCertificate) + return errors.New("tls: failed to parse client certificate: " + err.Error()) + } + if certs[i].PublicKeyAlgorithm == x509.RSA { + n := certs[i].PublicKey.(*rsa.PublicKey).N.BitLen() + if max, ok := checkKeySize(n); !ok { + c.sendAlert(alertBadCertificate) + return fmt.Errorf("tls: client sent certificate containing RSA key larger than %d bits", max) + } + } + } + + if len(certs) == 0 && requiresClientCert(c.config.ClientAuth) { + if c.vers == VersionTLS13 { + c.sendAlert(alertCertificateRequired) + } else { + c.sendAlert(alertBadCertificate) + } + return errors.New("tls: client didn't provide a certificate") + } + + if c.config.ClientAuth >= VerifyClientCertIfGiven && len(certs) > 0 { + opts := x509.VerifyOptions{ + Roots: c.config.ClientCAs, + CurrentTime: c.config.time(), + Intermediates: x509.NewCertPool(), + KeyUsages: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth}, + } + + for _, cert := range certs[1:] { + opts.Intermediates.AddCert(cert) + } + + chains, err := certs[0].Verify(opts) + if err != nil { + var errCertificateInvalid x509.CertificateInvalidError + if errors.As(err, &x509.UnknownAuthorityError{}) { + c.sendAlert(alertUnknownCA) + } else if errors.As(err, &errCertificateInvalid) && errCertificateInvalid.Reason == x509.Expired { + c.sendAlert(alertCertificateExpired) + } else { + c.sendAlert(alertBadCertificate) + } + return &CertificateVerificationError{UnverifiedCertificates: certs, Err: err} + } + + c.verifiedChains, err = fipsAllowedChains(chains) + if err != nil { + c.sendAlert(alertBadCertificate) + return &CertificateVerificationError{UnverifiedCertificates: certs, Err: err} + } + } + + c.peerCertificates = certs + c.ocspResponse = certificate.OCSPStaple + c.scts = certificate.SignedCertificateTimestamps + + if len(certs) > 0 { + switch certs[0].PublicKey.(type) { + case *ecdsa.PublicKey, *rsa.PublicKey, ed25519.PublicKey: + default: + c.sendAlert(alertUnsupportedCertificate) + return fmt.Errorf("tls: client certificate contains an unsupported public key of type %T", certs[0].PublicKey) + } + } + + if c.config.VerifyPeerCertificate != nil { + if err := c.config.VerifyPeerCertificate(certificates, c.verifiedChains); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + + return nil +} + +func clientHelloInfo(ctx context.Context, c *Conn, clientHello *clientHelloMsg) *ClientHelloInfo { + supportedVersions := clientHello.supportedVersions + if len(clientHello.supportedVersions) == 0 { + supportedVersions = supportedVersionsFromMax(clientHello.vers) + } + + return &ClientHelloInfo{ + CipherSuites: clientHello.cipherSuites, + ServerName: clientHello.serverName, + SupportedCurves: clientHello.supportedCurves, + SupportedPoints: clientHello.supportedPoints, + SignatureSchemes: clientHello.supportedSignatureAlgorithms, + SupportedProtos: clientHello.alpnProtocols, + SupportedVersions: supportedVersions, + Extensions: clientHello.extensions, + Conn: c.conn, + config: c.config, + ctx: ctx, + } +} diff --git a/backend/vendor/github.com/enetx/utls/handshake_server_tls13.go b/backend/vendor/github.com/enetx/utls/handshake_server_tls13.go new file mode 100644 index 0000000..b188777 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/handshake_server_tls13.go @@ -0,0 +1,1148 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bytes" + "context" + "crypto" + "crypto/hmac" + "crypto/mlkem" + "crypto/rsa" + "errors" + "hash" + "io" + "slices" + "sort" + "time" + + "github.com/enetx/utls/internal/byteorder" + "github.com/enetx/utls/internal/fips140tls" + "github.com/enetx/utls/internal/hkdf" + "github.com/enetx/utls/internal/hpke" + "github.com/enetx/utls/internal/tls13" +) + +// maxClientPSKIdentities is the number of client PSK identities the server will +// attempt to validate. It will ignore the rest not to let cheap ClientHello +// messages cause too much work in session ticket decryption attempts. +const maxClientPSKIdentities = 5 + +type echServerContext struct { + hpkeContext *hpke.Receipient + configID uint8 + ciphersuite echCipher + transcript hash.Hash + // inner indicates that the initial client_hello we recieved contained an + // encrypted_client_hello extension that indicated it was an "inner" hello. + // We don't do any additional processing of the hello in this case, so all + // fields above are unset. + inner bool +} + +type serverHandshakeStateTLS13 struct { + c *Conn + ctx context.Context + clientHello *clientHelloMsg + hello *serverHelloMsg + sentDummyCCS bool + usingPSK bool + earlyData bool + suite *cipherSuiteTLS13 + cert *Certificate + sigAlg SignatureScheme + earlySecret *tls13.EarlySecret + sharedKey []byte + handshakeSecret *tls13.HandshakeSecret + masterSecret *tls13.MasterSecret + trafficSecret []byte // client_application_traffic_secret_0 + transcript hash.Hash + clientFinished []byte + echContext *echServerContext +} + +func (hs *serverHandshakeStateTLS13) handshake() error { + c := hs.c + + // For an overview of the TLS 1.3 handshake, see RFC 8446, Section 2. + if err := hs.processClientHello(); err != nil { + return err + } + if err := hs.checkForResumption(); err != nil { + return err + } + if err := hs.pickCertificate(); err != nil { + return err + } + c.buffering = true + if err := hs.sendServerParameters(); err != nil { + return err + } + if err := hs.sendServerCertificate(); err != nil { + return err + } + if err := hs.sendServerFinished(); err != nil { + return err + } + // Note that at this point we could start sending application data without + // waiting for the client's second flight, but the application might not + // expect the lack of replay protection of the ClientHello parameters. + if _, err := c.flush(); err != nil { + return err + } + if err := hs.readClientCertificate(); err != nil { + return err + } + if err := hs.readClientFinished(); err != nil { + return err + } + + c.isHandshakeComplete.Store(true) + + return nil +} + +func (hs *serverHandshakeStateTLS13) processClientHello() error { + c := hs.c + + hs.hello = new(serverHelloMsg) + + // TLS 1.3 froze the ServerHello.legacy_version field, and uses + // supported_versions instead. See RFC 8446, sections 4.1.3 and 4.2.1. + hs.hello.vers = VersionTLS12 + hs.hello.supportedVersion = c.vers + + if len(hs.clientHello.supportedVersions) == 0 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: client used the legacy version field to negotiate TLS 1.3") + } + + // Abort if the client is doing a fallback and landing lower than what we + // support. See RFC 7507, which however does not specify the interaction + // with supported_versions. The only difference is that with + // supported_versions a client has a chance to attempt a [TLS 1.2, TLS 1.4] + // handshake in case TLS 1.3 is broken but 1.2 is not. Alas, in that case, + // it will have to drop the TLS_FALLBACK_SCSV protection if it falls back to + // TLS 1.2, because a TLS 1.3 server would abort here. The situation before + // supported_versions was not better because there was just no way to do a + // TLS 1.4 handshake without risking the server selecting TLS 1.3. + for _, id := range hs.clientHello.cipherSuites { + if id == TLS_FALLBACK_SCSV { + // Use c.vers instead of max(supported_versions) because an attacker + // could defeat this by adding an arbitrary high version otherwise. + if c.vers < c.config.maxSupportedVersion(roleServer) { + c.sendAlert(alertInappropriateFallback) + return errors.New("tls: client using inappropriate protocol fallback") + } + break + } + } + + if len(hs.clientHello.compressionMethods) != 1 || + hs.clientHello.compressionMethods[0] != compressionNone { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: TLS 1.3 client supports illegal compression methods") + } + + hs.hello.random = make([]byte, 32) + if _, err := io.ReadFull(c.config.rand(), hs.hello.random); err != nil { + c.sendAlert(alertInternalError) + return err + } + + if len(hs.clientHello.secureRenegotiation) != 0 { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: initial handshake had non-empty renegotiation extension") + } + + if hs.clientHello.earlyData && c.quic != nil { + if len(hs.clientHello.pskIdentities) == 0 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: early_data without pre_shared_key") + } + } else if hs.clientHello.earlyData { + // See RFC 8446, Section 4.2.10 for the complicated behavior required + // here. The scenario is that a different server at our address offered + // to accept early data in the past, which we can't handle. For now, all + // 0-RTT enabled session tickets need to expire before a Go server can + // replace a server or join a pool. That's the same requirement that + // applies to mixing or replacing with any TLS 1.2 server. + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: client sent unexpected early data") + } + + hs.hello.sessionId = hs.clientHello.sessionId + hs.hello.compressionMethod = compressionNone + + preferenceList := defaultCipherSuitesTLS13 + if !hasAESGCMHardwareSupport || !aesgcmPreferred(hs.clientHello.cipherSuites) { + preferenceList = defaultCipherSuitesTLS13NoAES + } + if fips140tls.Required() { + preferenceList = defaultCipherSuitesTLS13FIPS + } + for _, suiteID := range preferenceList { + hs.suite = mutualCipherSuiteTLS13(hs.clientHello.cipherSuites, suiteID) + if hs.suite != nil { + break + } + } + if hs.suite == nil { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: no cipher suite supported by both client and server") + } + c.cipherSuite = hs.suite.id + hs.hello.cipherSuite = hs.suite.id + hs.transcript = hs.suite.hash.New() + + // First, if a post-quantum key exchange is available, use one. See + // draft-ietf-tls-key-share-prediction-01, Section 4 for why this must be + // first. + // + // Second, if the client sent a key share for a group we support, use that, + // to avoid a HelloRetryRequest round-trip. + // + // Finally, pick in our fixed preference order. + preferredGroups := c.config.curvePreferences(c.vers) + preferredGroups = slices.DeleteFunc(preferredGroups, func(group CurveID) bool { + return !slices.Contains(hs.clientHello.supportedCurves, group) + }) + if len(preferredGroups) == 0 { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: no key exchanges supported by both client and server") + } + hasKeyShare := func(group CurveID) bool { + for _, ks := range hs.clientHello.keyShares { + if ks.group == group { + return true + } + } + return false + } + sort.SliceStable(preferredGroups, func(i, j int) bool { + return hasKeyShare(preferredGroups[i]) && !hasKeyShare(preferredGroups[j]) + }) + sort.SliceStable(preferredGroups, func(i, j int) bool { + return isPQKeyExchange(preferredGroups[i]) && !isPQKeyExchange(preferredGroups[j]) + }) + selectedGroup := preferredGroups[0] + + var clientKeyShare *keyShare + for _, ks := range hs.clientHello.keyShares { + if ks.group == selectedGroup { + clientKeyShare = &ks + break + } + } + if clientKeyShare == nil { + ks, err := hs.doHelloRetryRequest(selectedGroup) + if err != nil { + return err + } + clientKeyShare = ks + } + c.curveID = selectedGroup + + ecdhGroup := selectedGroup + ecdhData := clientKeyShare.data + if selectedGroup == X25519MLKEM768 { + ecdhGroup = X25519 + if len(ecdhData) != mlkem.EncapsulationKeySize768+x25519PublicKeySize { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid X25519MLKEM768 client key share") + } + ecdhData = ecdhData[mlkem.EncapsulationKeySize768:] + } + if _, ok := curveForCurveID(ecdhGroup); !ok { + c.sendAlert(alertInternalError) + return errors.New("tls: CurvePreferences includes unsupported curve") + } + key, err := generateECDHEKey(c.config.rand(), ecdhGroup) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + hs.hello.serverShare = keyShare{group: selectedGroup, data: key.PublicKey().Bytes()} + peerKey, err := key.Curve().NewPublicKey(ecdhData) + if err != nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid client key share") + } + hs.sharedKey, err = key.ECDH(peerKey) + if err != nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid client key share") + } + if selectedGroup == X25519MLKEM768 { + k, err := mlkem.NewEncapsulationKey768(clientKeyShare.data[:mlkem.EncapsulationKeySize768]) + if err != nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid X25519MLKEM768 client key share") + } + mlkemSharedSecret, ciphertext := k.Encapsulate() + // draft-kwiatkowski-tls-ecdhe-mlkem-02, Section 3.1.3: "For + // X25519MLKEM768, the shared secret is the concatenation of the ML-KEM + // shared secret and the X25519 shared secret. The shared secret is 64 + // bytes (32 bytes for each part)." + hs.sharedKey = append(mlkemSharedSecret, hs.sharedKey...) + // draft-kwiatkowski-tls-ecdhe-mlkem-02, Section 3.1.2: "When the + // X25519MLKEM768 group is negotiated, the server's key exchange value + // is the concatenation of an ML-KEM ciphertext returned from + // encapsulation to the client's encapsulation key, and the server's + // ephemeral X25519 share." + hs.hello.serverShare.data = append(ciphertext, hs.hello.serverShare.data...) + } + + selectedProto, err := negotiateALPN(c.config.NextProtos, hs.clientHello.alpnProtocols, c.quic != nil) + if err != nil { + c.sendAlert(alertNoApplicationProtocol) + return err + } + c.clientProtocol = selectedProto + + if c.quic != nil { + // RFC 9001 Section 4.2: Clients MUST NOT offer TLS versions older than 1.3. + for _, v := range hs.clientHello.supportedVersions { + if v < VersionTLS13 { + c.sendAlert(alertProtocolVersion) + return errors.New("tls: client offered TLS version older than TLS 1.3") + } + } + // RFC 9001 Section 8.2. + if hs.clientHello.quicTransportParameters == nil { + c.sendAlert(alertMissingExtension) + return errors.New("tls: client did not send a quic_transport_parameters extension") + } + c.quicSetTransportParameters(hs.clientHello.quicTransportParameters) + } else { + if hs.clientHello.quicTransportParameters != nil { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: client sent an unexpected quic_transport_parameters extension") + } + } + + c.serverName = hs.clientHello.serverName + return nil +} + +func (hs *serverHandshakeStateTLS13) checkForResumption() error { + c := hs.c + + if c.config.SessionTicketsDisabled { + return nil + } + + modeOK := false + for _, mode := range hs.clientHello.pskModes { + if mode == pskModeDHE { + modeOK = true + break + } + } + if !modeOK { + return nil + } + + if len(hs.clientHello.pskIdentities) != len(hs.clientHello.pskBinders) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid or missing PSK binders") + } + if len(hs.clientHello.pskIdentities) == 0 { + return nil + } + + for i, identity := range hs.clientHello.pskIdentities { + if i >= maxClientPSKIdentities { + break + } + + var sessionState *SessionState + if c.config.UnwrapSession != nil { + var err error + sessionState, err = c.config.UnwrapSession(identity.label, c.connectionStateLocked()) + if err != nil { + return err + } + if sessionState == nil { + continue + } + } else { + plaintext := c.config.decryptTicket(identity.label, c.ticketKeys) + if plaintext == nil { + continue + } + var err error + sessionState, err = ParseSessionState(plaintext) + if err != nil { + continue + } + } + + if sessionState.version != VersionTLS13 { + continue + } + + createdAt := time.Unix(int64(sessionState.createdAt), 0) + if c.config.time().Sub(createdAt) > maxSessionTicketLifetime { + continue + } + + pskSuite := cipherSuiteTLS13ByID(sessionState.cipherSuite) + if pskSuite == nil || pskSuite.hash != hs.suite.hash { + continue + } + + // PSK connections don't re-establish client certificates, but carry + // them over in the session ticket. Ensure the presence of client certs + // in the ticket is consistent with the configured requirements. + sessionHasClientCerts := len(sessionState.peerCertificates) != 0 + needClientCerts := requiresClientCert(c.config.ClientAuth) + if needClientCerts && !sessionHasClientCerts { + continue + } + if sessionHasClientCerts && c.config.ClientAuth == NoClientCert { + continue + } + if sessionHasClientCerts && c.config.time().After(sessionState.peerCertificates[0].NotAfter) { + continue + } + if sessionHasClientCerts && c.config.ClientAuth >= VerifyClientCertIfGiven && + len(sessionState.verifiedChains) == 0 { + continue + } + + if c.quic != nil && c.quic.enableSessionEvents { + if err := c.quicResumeSession(sessionState); err != nil { + return err + } + } + + hs.earlySecret = tls13.NewEarlySecret(hs.suite.hash.New, sessionState.secret) + binderKey := hs.earlySecret.ResumptionBinderKey() + // Clone the transcript in case a HelloRetryRequest was recorded. + transcript := cloneHash(hs.transcript, hs.suite.hash) + if transcript == nil { + c.sendAlert(alertInternalError) + return errors.New("tls: internal error: failed to clone hash") + } + clientHelloBytes, err := hs.clientHello.marshalWithoutBinders() + if err != nil { + c.sendAlert(alertInternalError) + return err + } + transcript.Write(clientHelloBytes) + pskBinder := hs.suite.finishedHash(binderKey, transcript) + if !hmac.Equal(hs.clientHello.pskBinders[i], pskBinder) { + c.sendAlert(alertDecryptError) + return errors.New("tls: invalid PSK binder") + } + + if c.quic != nil && hs.clientHello.earlyData && i == 0 && + sessionState.EarlyData && sessionState.cipherSuite == hs.suite.id && + sessionState.alpnProtocol == c.clientProtocol { + hs.earlyData = true + + transcript := hs.suite.hash.New() + if err := transcriptMsg(hs.clientHello, transcript); err != nil { + return err + } + earlyTrafficSecret := hs.earlySecret.ClientEarlyTrafficSecret(transcript) + c.quicSetReadSecret(QUICEncryptionLevelEarly, hs.suite.id, earlyTrafficSecret) + } + + c.didResume = true + c.peerCertificates = sessionState.peerCertificates + c.ocspResponse = sessionState.ocspResponse + c.scts = sessionState.scts + c.verifiedChains = sessionState.verifiedChains + + hs.hello.selectedIdentityPresent = true + hs.hello.selectedIdentity = uint16(i) + hs.usingPSK = true + return nil + } + + return nil +} + +// cloneHash uses the encoding.BinaryMarshaler and encoding.BinaryUnmarshaler +// interfaces implemented by standard library hashes to clone the state of in +// to a new instance of h. It returns nil if the operation fails. +func cloneHash(in hash.Hash, h crypto.Hash) hash.Hash { + // Recreate the interface to avoid importing encoding. + type binaryMarshaler interface { + MarshalBinary() (data []byte, err error) + UnmarshalBinary(data []byte) error + } + marshaler, ok := in.(binaryMarshaler) + if !ok { + return nil + } + state, err := marshaler.MarshalBinary() + if err != nil { + return nil + } + out := h.New() + unmarshaler, ok := out.(binaryMarshaler) + if !ok { + return nil + } + if err := unmarshaler.UnmarshalBinary(state); err != nil { + return nil + } + return out +} + +func (hs *serverHandshakeStateTLS13) pickCertificate() error { + c := hs.c + + // Only one of PSK and certificates are used at a time. + if hs.usingPSK { + return nil + } + + // signature_algorithms is required in TLS 1.3. See RFC 8446, Section 4.2.3. + if len(hs.clientHello.supportedSignatureAlgorithms) == 0 { + return c.sendAlert(alertMissingExtension) + } + + certificate, err := c.config.getCertificate(clientHelloInfo(hs.ctx, c, hs.clientHello)) + if err != nil { + if err == errNoCertificates { + c.sendAlert(alertUnrecognizedName) + } else { + c.sendAlert(alertInternalError) + } + return err + } + hs.sigAlg, err = selectSignatureScheme(c.vers, certificate, hs.clientHello.supportedSignatureAlgorithms) + if err != nil { + // getCertificate returned a certificate that is unsupported or + // incompatible with the client's signature algorithms. + c.sendAlert(alertHandshakeFailure) + return err + } + hs.cert = certificate + + return nil +} + +// sendDummyChangeCipherSpec sends a ChangeCipherSpec record for compatibility +// with middleboxes that didn't implement TLS correctly. See RFC 8446, Appendix D.4. +func (hs *serverHandshakeStateTLS13) sendDummyChangeCipherSpec() error { + if hs.c.quic != nil { + return nil + } + if hs.sentDummyCCS { + return nil + } + hs.sentDummyCCS = true + + return hs.c.writeChangeCipherRecord() +} + +func (hs *serverHandshakeStateTLS13) doHelloRetryRequest(selectedGroup CurveID) (*keyShare, error) { + c := hs.c + + // The first ClientHello gets double-hashed into the transcript upon a + // HelloRetryRequest. See RFC 8446, Section 4.4.1. + if err := transcriptMsg(hs.clientHello, hs.transcript); err != nil { + return nil, err + } + chHash := hs.transcript.Sum(nil) + hs.transcript.Reset() + hs.transcript.Write([]byte{typeMessageHash, 0, 0, uint8(len(chHash))}) + hs.transcript.Write(chHash) + + helloRetryRequest := &serverHelloMsg{ + vers: hs.hello.vers, + random: helloRetryRequestRandom, + sessionId: hs.hello.sessionId, + cipherSuite: hs.hello.cipherSuite, + compressionMethod: hs.hello.compressionMethod, + supportedVersion: hs.hello.supportedVersion, + selectedGroup: selectedGroup, + } + + if hs.echContext != nil { + // Compute the acceptance message. + helloRetryRequest.encryptedClientHello = make([]byte, 8) + confTranscript := cloneHash(hs.transcript, hs.suite.hash) + if err := transcriptMsg(helloRetryRequest, confTranscript); err != nil { + return nil, err + } + acceptConfirmation := tls13.ExpandLabel(hs.suite.hash.New, + hkdf.Extract(hs.suite.hash.New, hs.clientHello.random, nil), + "hrr ech accept confirmation", + confTranscript.Sum(nil), + 8, + ) + helloRetryRequest.encryptedClientHello = acceptConfirmation + } + + if _, err := hs.c.writeHandshakeRecord(helloRetryRequest, hs.transcript); err != nil { + return nil, err + } + + if err := hs.sendDummyChangeCipherSpec(); err != nil { + return nil, err + } + + // clientHelloMsg is not included in the transcript. + msg, err := c.readHandshake(nil) + if err != nil { + return nil, err + } + + clientHello, ok := msg.(*clientHelloMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return nil, unexpectedMessageError(clientHello, msg) + } + + if hs.echContext != nil { + if len(clientHello.encryptedClientHello) == 0 { + c.sendAlert(alertMissingExtension) + return nil, errors.New("tls: second client hello missing encrypted client hello extension") + } + + echType, echCiphersuite, configID, encap, payload, err := parseECHExt(clientHello.encryptedClientHello) + if err != nil { + c.sendAlert(alertDecodeError) + return nil, errors.New("tls: client sent invalid encrypted client hello extension") + } + + if echType == outerECHExt && hs.echContext.inner || echType == innerECHExt && !hs.echContext.inner { + c.sendAlert(alertDecodeError) + return nil, errors.New("tls: unexpected switch in encrypted client hello extension type") + } + + if echType == outerECHExt { + if echCiphersuite != hs.echContext.ciphersuite || configID != hs.echContext.configID || len(encap) != 0 { + c.sendAlert(alertIllegalParameter) + return nil, errors.New("tls: second client hello encrypted client hello extension does not match") + } + + encodedInner, err := decryptECHPayload(hs.echContext.hpkeContext, clientHello.original, payload) + if err != nil { + c.sendAlert(alertDecryptError) + return nil, errors.New("tls: failed to decrypt second client hello encrypted client hello extension payload") + } + + echInner, err := decodeInnerClientHello(clientHello, encodedInner) + if err != nil { + c.sendAlert(alertIllegalParameter) + return nil, errors.New("tls: client sent invalid encrypted client hello extension") + } + + clientHello = echInner + } + } + + if len(clientHello.keyShares) != 1 { + c.sendAlert(alertIllegalParameter) + return nil, errors.New("tls: client didn't send one key share in second ClientHello") + } + ks := &clientHello.keyShares[0] + + if ks.group != selectedGroup { + c.sendAlert(alertIllegalParameter) + return nil, errors.New("tls: client sent unexpected key share in second ClientHello") + } + + if clientHello.earlyData { + c.sendAlert(alertIllegalParameter) + return nil, errors.New("tls: client indicated early data in second ClientHello") + } + + if illegalClientHelloChange(clientHello, hs.clientHello) { + c.sendAlert(alertIllegalParameter) + return nil, errors.New("tls: client illegally modified second ClientHello") + } + + c.didHRR = true + hs.clientHello = clientHello + return ks, nil +} + +// illegalClientHelloChange reports whether the two ClientHello messages are +// different, with the exception of the changes allowed before and after a +// HelloRetryRequest. See RFC 8446, Section 4.1.2. +func illegalClientHelloChange(ch, ch1 *clientHelloMsg) bool { + if len(ch.supportedVersions) != len(ch1.supportedVersions) || + len(ch.cipherSuites) != len(ch1.cipherSuites) || + len(ch.supportedCurves) != len(ch1.supportedCurves) || + len(ch.supportedSignatureAlgorithms) != len(ch1.supportedSignatureAlgorithms) || + len(ch.supportedSignatureAlgorithmsCert) != len(ch1.supportedSignatureAlgorithmsCert) || + len(ch.alpnProtocols) != len(ch1.alpnProtocols) { + return true + } + for i := range ch.supportedVersions { + if ch.supportedVersions[i] != ch1.supportedVersions[i] { + return true + } + } + for i := range ch.cipherSuites { + if ch.cipherSuites[i] != ch1.cipherSuites[i] { + return true + } + } + for i := range ch.supportedCurves { + if ch.supportedCurves[i] != ch1.supportedCurves[i] { + return true + } + } + for i := range ch.supportedSignatureAlgorithms { + if ch.supportedSignatureAlgorithms[i] != ch1.supportedSignatureAlgorithms[i] { + return true + } + } + for i := range ch.supportedSignatureAlgorithmsCert { + if ch.supportedSignatureAlgorithmsCert[i] != ch1.supportedSignatureAlgorithmsCert[i] { + return true + } + } + for i := range ch.alpnProtocols { + if ch.alpnProtocols[i] != ch1.alpnProtocols[i] { + return true + } + } + return ch.vers != ch1.vers || + !bytes.Equal(ch.random, ch1.random) || + !bytes.Equal(ch.sessionId, ch1.sessionId) || + !bytes.Equal(ch.compressionMethods, ch1.compressionMethods) || + ch.serverName != ch1.serverName || + ch.ocspStapling != ch1.ocspStapling || + !bytes.Equal(ch.supportedPoints, ch1.supportedPoints) || + ch.ticketSupported != ch1.ticketSupported || + !bytes.Equal(ch.sessionTicket, ch1.sessionTicket) || + ch.secureRenegotiationSupported != ch1.secureRenegotiationSupported || + !bytes.Equal(ch.secureRenegotiation, ch1.secureRenegotiation) || + ch.scts != ch1.scts || + !bytes.Equal(ch.cookie, ch1.cookie) || + !bytes.Equal(ch.pskModes, ch1.pskModes) +} + +func (hs *serverHandshakeStateTLS13) sendServerParameters() error { + c := hs.c + + if hs.echContext != nil { + copy(hs.hello.random[32-8:], make([]byte, 8)) + echTranscript := cloneHash(hs.transcript, hs.suite.hash) + echTranscript.Write(hs.clientHello.original) + if err := transcriptMsg(hs.hello, echTranscript); err != nil { + return err + } + // compute the acceptance message + acceptConfirmation := tls13.ExpandLabel(hs.suite.hash.New, + hkdf.Extract(hs.suite.hash.New, hs.clientHello.random, nil), + "ech accept confirmation", + echTranscript.Sum(nil), + 8, + ) + copy(hs.hello.random[32-8:], acceptConfirmation) + } + + if err := transcriptMsg(hs.clientHello, hs.transcript); err != nil { + return err + } + + if _, err := hs.c.writeHandshakeRecord(hs.hello, hs.transcript); err != nil { + return err + } + + if err := hs.sendDummyChangeCipherSpec(); err != nil { + return err + } + + earlySecret := hs.earlySecret + if earlySecret == nil { + earlySecret = tls13.NewEarlySecret(hs.suite.hash.New, nil) + } + hs.handshakeSecret = earlySecret.HandshakeSecret(hs.sharedKey) + + clientSecret := hs.handshakeSecret.ClientHandshakeTrafficSecret(hs.transcript) + c.in.setTrafficSecret(hs.suite, QUICEncryptionLevelHandshake, clientSecret) + serverSecret := hs.handshakeSecret.ServerHandshakeTrafficSecret(hs.transcript) + c.out.setTrafficSecret(hs.suite, QUICEncryptionLevelHandshake, serverSecret) + + if c.quic != nil { + if c.hand.Len() != 0 { + c.sendAlert(alertUnexpectedMessage) + } + c.quicSetWriteSecret(QUICEncryptionLevelHandshake, hs.suite.id, serverSecret) + c.quicSetReadSecret(QUICEncryptionLevelHandshake, hs.suite.id, clientSecret) + } + + err := c.config.writeKeyLog(keyLogLabelClientHandshake, hs.clientHello.random, clientSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + err = c.config.writeKeyLog(keyLogLabelServerHandshake, hs.clientHello.random, serverSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + + encryptedExtensions := new(encryptedExtensionsMsg) + encryptedExtensions.alpnProtocol = c.clientProtocol + + if c.quic != nil { + p, err := c.quicGetTransportParameters() + if err != nil { + return err + } + encryptedExtensions.quicTransportParameters = p + encryptedExtensions.earlyData = hs.earlyData + } + + // If client sent ECH extension, but we didn't accept it, + // send retry configs, if available. + if len(hs.c.config.EncryptedClientHelloKeys) > 0 && len(hs.clientHello.encryptedClientHello) > 0 && hs.echContext == nil { + encryptedExtensions.echRetryConfigs, err = buildRetryConfigList(hs.c.config.EncryptedClientHelloKeys) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + } + + if _, err := hs.c.writeHandshakeRecord(encryptedExtensions, hs.transcript); err != nil { + return err + } + + return nil +} + +func (hs *serverHandshakeStateTLS13) requestClientCert() bool { + return hs.c.config.ClientAuth >= RequestClientCert && !hs.usingPSK +} + +func (hs *serverHandshakeStateTLS13) sendServerCertificate() error { + c := hs.c + + // Only one of PSK and certificates are used at a time. + if hs.usingPSK { + return nil + } + + if hs.requestClientCert() { + // Request a client certificate + certReq := new(certificateRequestMsgTLS13) + certReq.ocspStapling = true + certReq.scts = true + certReq.supportedSignatureAlgorithms = supportedSignatureAlgorithms() + if c.config.ClientCAs != nil { + certReq.certificateAuthorities = c.config.ClientCAs.Subjects() + } + + if _, err := hs.c.writeHandshakeRecord(certReq, hs.transcript); err != nil { + return err + } + } + + certMsg := new(certificateMsgTLS13) + + certMsg.certificate = *hs.cert + certMsg.scts = hs.clientHello.scts && len(hs.cert.SignedCertificateTimestamps) > 0 + certMsg.ocspStapling = hs.clientHello.ocspStapling && len(hs.cert.OCSPStaple) > 0 + + if _, err := hs.c.writeHandshakeRecord(certMsg, hs.transcript); err != nil { + return err + } + + certVerifyMsg := new(certificateVerifyMsg) + certVerifyMsg.hasSignatureAlgorithm = true + certVerifyMsg.signatureAlgorithm = hs.sigAlg + + sigType, sigHash, err := typeAndHashFromSignatureScheme(hs.sigAlg) + if err != nil { + return c.sendAlert(alertInternalError) + } + + signed := signedMessage(sigHash, serverSignatureContext, hs.transcript) + signOpts := crypto.SignerOpts(sigHash) + if sigType == signatureRSAPSS { + signOpts = &rsa.PSSOptions{SaltLength: rsa.PSSSaltLengthEqualsHash, Hash: sigHash} + } + sig, err := hs.cert.PrivateKey.(crypto.Signer).Sign(c.config.rand(), signed, signOpts) + if err != nil { + public := hs.cert.PrivateKey.(crypto.Signer).Public() + if rsaKey, ok := public.(*rsa.PublicKey); ok && sigType == signatureRSAPSS && + rsaKey.N.BitLen()/8 < sigHash.Size()*2+2 { // key too small for RSA-PSS + c.sendAlert(alertHandshakeFailure) + } else { + c.sendAlert(alertInternalError) + } + return errors.New("tls: failed to sign handshake: " + err.Error()) + } + certVerifyMsg.signature = sig + + if _, err := hs.c.writeHandshakeRecord(certVerifyMsg, hs.transcript); err != nil { + return err + } + + return nil +} + +func (hs *serverHandshakeStateTLS13) sendServerFinished() error { + c := hs.c + + finished := &finishedMsg{ + verifyData: hs.suite.finishedHash(c.out.trafficSecret, hs.transcript), + } + + if _, err := hs.c.writeHandshakeRecord(finished, hs.transcript); err != nil { + return err + } + + // Derive secrets that take context through the server Finished. + + hs.masterSecret = hs.handshakeSecret.MasterSecret() + + hs.trafficSecret = hs.masterSecret.ClientApplicationTrafficSecret(hs.transcript) + serverSecret := hs.masterSecret.ServerApplicationTrafficSecret(hs.transcript) + c.out.setTrafficSecret(hs.suite, QUICEncryptionLevelApplication, serverSecret) + + if c.quic != nil { + if c.hand.Len() != 0 { + // TODO: Handle this in setTrafficSecret? + c.sendAlert(alertUnexpectedMessage) + } + c.quicSetWriteSecret(QUICEncryptionLevelApplication, hs.suite.id, serverSecret) + } + + err := c.config.writeKeyLog(keyLogLabelClientTraffic, hs.clientHello.random, hs.trafficSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + err = c.config.writeKeyLog(keyLogLabelServerTraffic, hs.clientHello.random, serverSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + + c.ekm = hs.suite.exportKeyingMaterial(hs.masterSecret, hs.transcript) + + // If we did not request client certificates, at this point we can + // precompute the client finished and roll the transcript forward to send + // session tickets in our first flight. + if !hs.requestClientCert() { + if err := hs.sendSessionTickets(); err != nil { + return err + } + } + + return nil +} + +func (hs *serverHandshakeStateTLS13) shouldSendSessionTickets() bool { + if hs.c.config.SessionTicketsDisabled { + return false + } + + // QUIC tickets are sent by QUICConn.SendSessionTicket, not automatically. + if hs.c.quic != nil { + return false + } + + // Don't send tickets the client wouldn't use. See RFC 8446, Section 4.2.9. + for _, pskMode := range hs.clientHello.pskModes { + if pskMode == pskModeDHE { + return true + } + } + return false +} + +func (hs *serverHandshakeStateTLS13) sendSessionTickets() error { + c := hs.c + + hs.clientFinished = hs.suite.finishedHash(c.in.trafficSecret, hs.transcript) + finishedMsg := &finishedMsg{ + verifyData: hs.clientFinished, + } + if err := transcriptMsg(finishedMsg, hs.transcript); err != nil { + return err + } + + c.resumptionSecret = hs.masterSecret.ResumptionMasterSecret(hs.transcript) + + if !hs.shouldSendSessionTickets() { + return nil + } + return c.sendSessionTicket(false, nil) +} + +func (c *Conn) sendSessionTicket(earlyData bool, extra [][]byte) error { + suite := cipherSuiteTLS13ByID(c.cipherSuite) + if suite == nil { + return errors.New("tls: internal error: unknown cipher suite") + } + // ticket_nonce, which must be unique per connection, is always left at + // zero because we only ever send one ticket per connection. + psk := tls13.ExpandLabel(suite.hash.New, c.resumptionSecret, "resumption", + nil, suite.hash.Size()) + + m := new(newSessionTicketMsgTLS13) + + state := c.sessionState() + state.secret = psk + state.EarlyData = earlyData + state.Extra = extra + if c.config.WrapSession != nil { + var err error + m.label, err = c.config.WrapSession(c.connectionStateLocked(), state) + if err != nil { + return err + } + } else { + stateBytes, err := state.Bytes() + if err != nil { + c.sendAlert(alertInternalError) + return err + } + m.label, err = c.config.encryptTicket(stateBytes, c.ticketKeys) + if err != nil { + return err + } + } + m.lifetime = uint32(maxSessionTicketLifetime / time.Second) + + // ticket_age_add is a random 32-bit value. See RFC 8446, section 4.6.1 + // The value is not stored anywhere; we never need to check the ticket age + // because 0-RTT is not supported. + ageAdd := make([]byte, 4) + if _, err := c.config.rand().Read(ageAdd); err != nil { + return err + } + m.ageAdd = byteorder.LEUint32(ageAdd) + + if earlyData { + // RFC 9001, Section 4.6.1 + m.maxEarlyData = 0xffffffff + } + + if _, err := c.writeHandshakeRecord(m, nil); err != nil { + return err + } + + return nil +} + +func (hs *serverHandshakeStateTLS13) readClientCertificate() error { + c := hs.c + + if !hs.requestClientCert() { + // Make sure the connection is still being verified whether or not + // the server requested a client certificate. + if c.config.VerifyConnection != nil { + if err := c.config.VerifyConnection(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + return nil + } + + // If we requested a client certificate, then the client must send a + // certificate message. If it's empty, no CertificateVerify is sent. + + msg, err := c.readHandshake(hs.transcript) + if err != nil { + return err + } + + certMsg, ok := msg.(*certificateMsgTLS13) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(certMsg, msg) + } + + if err := c.processCertsFromClient(certMsg.certificate); err != nil { + return err + } + + if c.config.VerifyConnection != nil { + if err := c.config.VerifyConnection(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + + if len(certMsg.certificate.Certificate) != 0 { + // certificateVerifyMsg is included in the transcript, but not until + // after we verify the handshake signature, since the state before + // this message was sent is used. + msg, err = c.readHandshake(nil) + if err != nil { + return err + } + + certVerify, ok := msg.(*certificateVerifyMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(certVerify, msg) + } + + // See RFC 8446, Section 4.4.3. + if !isSupportedSignatureAlgorithm(certVerify.signatureAlgorithm, supportedSignatureAlgorithms()) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: client certificate used with invalid signature algorithm") + } + sigType, sigHash, err := typeAndHashFromSignatureScheme(certVerify.signatureAlgorithm) + if err != nil { + return c.sendAlert(alertInternalError) + } + if sigType == signaturePKCS1v15 || sigHash == crypto.SHA1 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: client certificate used with invalid signature algorithm") + } + signed := signedMessage(sigHash, clientSignatureContext, hs.transcript) + if err := verifyHandshakeSignature(sigType, c.peerCertificates[0].PublicKey, + sigHash, signed, certVerify.signature); err != nil { + c.sendAlert(alertDecryptError) + return errors.New("tls: invalid signature by the client certificate: " + err.Error()) + } + + if err := transcriptMsg(certVerify, hs.transcript); err != nil { + return err + } + } + + // If we waited until the client certificates to send session tickets, we + // are ready to do it now. + if err := hs.sendSessionTickets(); err != nil { + return err + } + + return nil +} + +func (hs *serverHandshakeStateTLS13) readClientFinished() error { + c := hs.c + + // finishedMsg is not included in the transcript. + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + + finished, ok := msg.(*finishedMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(finished, msg) + } + + if !hmac.Equal(hs.clientFinished, finished.verifyData) { + c.sendAlert(alertDecryptError) + return errors.New("tls: invalid client finished hash") + } + + c.in.setTrafficSecret(hs.suite, QUICEncryptionLevelApplication, hs.trafficSecret) + + return nil +} diff --git a/backend/vendor/github.com/enetx/utls/internal/boring/notboring.go b/backend/vendor/github.com/enetx/utls/internal/boring/notboring.go new file mode 100644 index 0000000..913afd5 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/internal/boring/notboring.go @@ -0,0 +1,20 @@ +package boring + +import ( + "crypto/cipher" + "errors" +) + +const Enabled bool = false + +func NewGCMTLS(_ cipher.Block) (cipher.AEAD, error) { + return nil, errors.New("boring not implemented") +} + +func NewGCMTLS13(_ cipher.Block) (cipher.AEAD, error) { + return nil, errors.New("boring not implemented") +} + +func Unreachable() { + // do nothing +} diff --git a/backend/vendor/github.com/enetx/utls/internal/byteorder/byteorder.go b/backend/vendor/github.com/enetx/utls/internal/byteorder/byteorder.go new file mode 100644 index 0000000..01500a8 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/internal/byteorder/byteorder.go @@ -0,0 +1,149 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package byteorder provides functions for decoding and encoding +// little and big endian integer types from/to byte slices. +package byteorder + +func LEUint16(b []byte) uint16 { + _ = b[1] // bounds check hint to compiler; see golang.org/issue/14808 + return uint16(b[0]) | uint16(b[1])<<8 +} + +func LEPutUint16(b []byte, v uint16) { + _ = b[1] // early bounds check to guarantee safety of writes below + b[0] = byte(v) + b[1] = byte(v >> 8) +} + +func LEAppendUint16(b []byte, v uint16) []byte { + return append(b, + byte(v), + byte(v>>8), + ) +} + +func LEUint32(b []byte) uint32 { + _ = b[3] // bounds check hint to compiler; see golang.org/issue/14808 + return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 +} + +func LEPutUint32(b []byte, v uint32) { + _ = b[3] // early bounds check to guarantee safety of writes below + b[0] = byte(v) + b[1] = byte(v >> 8) + b[2] = byte(v >> 16) + b[3] = byte(v >> 24) +} + +func LEAppendUint32(b []byte, v uint32) []byte { + return append(b, + byte(v), + byte(v>>8), + byte(v>>16), + byte(v>>24), + ) +} + +func LEUint64(b []byte) uint64 { + _ = b[7] // bounds check hint to compiler; see golang.org/issue/14808 + return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | + uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56 +} + +func LEPutUint64(b []byte, v uint64) { + _ = b[7] // early bounds check to guarantee safety of writes below + b[0] = byte(v) + b[1] = byte(v >> 8) + b[2] = byte(v >> 16) + b[3] = byte(v >> 24) + b[4] = byte(v >> 32) + b[5] = byte(v >> 40) + b[6] = byte(v >> 48) + b[7] = byte(v >> 56) +} + +func LEAppendUint64(b []byte, v uint64) []byte { + return append(b, + byte(v), + byte(v>>8), + byte(v>>16), + byte(v>>24), + byte(v>>32), + byte(v>>40), + byte(v>>48), + byte(v>>56), + ) +} + +func BEUint16(b []byte) uint16 { + _ = b[1] // bounds check hint to compiler; see golang.org/issue/14808 + return uint16(b[1]) | uint16(b[0])<<8 +} + +func BEPutUint16(b []byte, v uint16) { + _ = b[1] // early bounds check to guarantee safety of writes below + b[0] = byte(v >> 8) + b[1] = byte(v) +} + +func BEAppendUint16(b []byte, v uint16) []byte { + return append(b, + byte(v>>8), + byte(v), + ) +} + +func BEUint32(b []byte) uint32 { + _ = b[3] // bounds check hint to compiler; see golang.org/issue/14808 + return uint32(b[3]) | uint32(b[2])<<8 | uint32(b[1])<<16 | uint32(b[0])<<24 +} + +func BEPutUint32(b []byte, v uint32) { + _ = b[3] // early bounds check to guarantee safety of writes below + b[0] = byte(v >> 24) + b[1] = byte(v >> 16) + b[2] = byte(v >> 8) + b[3] = byte(v) +} + +func BEAppendUint32(b []byte, v uint32) []byte { + return append(b, + byte(v>>24), + byte(v>>16), + byte(v>>8), + byte(v), + ) +} + +func BEUint64(b []byte) uint64 { + _ = b[7] // bounds check hint to compiler; see golang.org/issue/14808 + return uint64(b[7]) | uint64(b[6])<<8 | uint64(b[5])<<16 | uint64(b[4])<<24 | + uint64(b[3])<<32 | uint64(b[2])<<40 | uint64(b[1])<<48 | uint64(b[0])<<56 +} + +func BEPutUint64(b []byte, v uint64) { + _ = b[7] // early bounds check to guarantee safety of writes below + b[0] = byte(v >> 56) + b[1] = byte(v >> 48) + b[2] = byte(v >> 40) + b[3] = byte(v >> 32) + b[4] = byte(v >> 24) + b[5] = byte(v >> 16) + b[6] = byte(v >> 8) + b[7] = byte(v) +} + +func BEAppendUint64(b []byte, v uint64) []byte { + return append(b, + byte(v>>56), + byte(v>>48), + byte(v>>40), + byte(v>>32), + byte(v>>24), + byte(v>>16), + byte(v>>8), + byte(v), + ) +} diff --git a/backend/vendor/github.com/enetx/utls/internal/fips140tls/fipstls.go b/backend/vendor/github.com/enetx/utls/internal/fips140tls/fipstls.go new file mode 100644 index 0000000..df03808 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/internal/fips140tls/fipstls.go @@ -0,0 +1,5 @@ +package fips140tls + +func Required() bool { + return false +} diff --git a/backend/vendor/github.com/enetx/utls/internal/helper/typeconv.go b/backend/vendor/github.com/enetx/utls/internal/helper/typeconv.go new file mode 100644 index 0000000..73ec058 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/internal/helper/typeconv.go @@ -0,0 +1,23 @@ +package helper + +import ( + "errors" + + "golang.org/x/crypto/cryptobyte" +) + +// Uint8to16 converts a slice of uint8 to a slice of uint16. +// e.g. []uint8{0x00, 0x01, 0x00, 0x02} -> []uint16{0x0001, 0x0002} +func Uint8to16(in []uint8) ([]uint16, error) { + s := cryptobyte.String(in) + var out []uint16 + for !s.Empty() { + var v uint16 + if s.ReadUint16(&v) { + out = append(out, v) + } else { + return nil, errors.New("ReadUint16 failed") + } + } + return out, nil +} diff --git a/backend/vendor/github.com/enetx/utls/internal/hkdf/hkdf.go b/backend/vendor/github.com/enetx/utls/internal/hkdf/hkdf.go new file mode 100644 index 0000000..184ef7b --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/internal/hkdf/hkdf.go @@ -0,0 +1,24 @@ +package hkdf + +import ( + "crypto/hkdf" + "hash" +) + +func Extract[H hash.Hash](h func() H, secret, salt []byte) []byte { + res, err := hkdf.Extract(h, secret, salt) + if err != nil { + panic(err) + } + + return res +} + +func Expand[H hash.Hash](h func() H, pseudorandomKey []byte, info string, keyLength int) []byte { + res, err := hkdf.Expand(h, pseudorandomKey, info, keyLength) + if err != nil { + panic(err) + } + + return res +} diff --git a/backend/vendor/github.com/enetx/utls/internal/hpke/hpke.go b/backend/vendor/github.com/enetx/utls/internal/hpke/hpke.go new file mode 100644 index 0000000..3095a2e --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/internal/hpke/hpke.go @@ -0,0 +1,333 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package hpke + +import ( + "crypto" + "crypto/aes" + "crypto/cipher" + "crypto/ecdh" + "crypto/rand" + "errors" + "math/bits" + + "github.com/enetx/utls/internal/byteorder" + "github.com/enetx/utls/internal/hkdf" + "golang.org/x/crypto/chacha20poly1305" +) + +// testingOnlyGenerateKey is only used during testing, to provide +// a fixed test key to use when checking the RFC 9180 vectors. +var testingOnlyGenerateKey func() (*ecdh.PrivateKey, error) + +type hkdfKDF struct { + hash crypto.Hash +} + +func (kdf *hkdfKDF) LabeledExtract(sid []byte, salt []byte, label string, inputKey []byte) []byte { + labeledIKM := make([]byte, 0, 7+len(sid)+len(label)+len(inputKey)) + labeledIKM = append(labeledIKM, []byte("HPKE-v1")...) + labeledIKM = append(labeledIKM, sid...) + labeledIKM = append(labeledIKM, label...) + labeledIKM = append(labeledIKM, inputKey...) + return hkdf.Extract(kdf.hash.New, labeledIKM, salt) +} + +func (kdf *hkdfKDF) LabeledExpand(suiteID []byte, randomKey []byte, label string, info []byte, length uint16) []byte { + labeledInfo := make([]byte, 0, 2+7+len(suiteID)+len(label)+len(info)) + labeledInfo = byteorder.BEAppendUint16(labeledInfo, length) + labeledInfo = append(labeledInfo, []byte("HPKE-v1")...) + labeledInfo = append(labeledInfo, suiteID...) + labeledInfo = append(labeledInfo, label...) + labeledInfo = append(labeledInfo, info...) + return hkdf.Expand(kdf.hash.New, randomKey, string(labeledInfo), int(length)) +} + +// dhKEM implements the KEM specified in RFC 9180, Section 4.1. +type dhKEM struct { + dh ecdh.Curve + kdf hkdfKDF + + suiteID []byte + nSecret uint16 +} + +type KemID uint16 + +const DHKEM_X25519_HKDF_SHA256 = 0x0020 + +var SupportedKEMs = map[uint16]struct { + curve ecdh.Curve + hash crypto.Hash + nSecret uint16 +}{ + // RFC 9180 Section 7.1 + DHKEM_X25519_HKDF_SHA256: {ecdh.X25519(), crypto.SHA256, 32}, +} + +func newDHKem(kemID uint16) (*dhKEM, error) { + suite, ok := SupportedKEMs[kemID] + if !ok { + return nil, errors.New("unsupported suite ID") + } + return &dhKEM{ + dh: suite.curve, + kdf: hkdfKDF{suite.hash}, + suiteID: byteorder.BEAppendUint16([]byte("KEM"), kemID), + nSecret: suite.nSecret, + }, nil +} + +func (dh *dhKEM) ExtractAndExpand(dhKey, kemContext []byte) []byte { + eaePRK := dh.kdf.LabeledExtract(dh.suiteID[:], nil, "eae_prk", dhKey) + return dh.kdf.LabeledExpand(dh.suiteID[:], eaePRK, "shared_secret", kemContext, dh.nSecret) +} + +func (dh *dhKEM) Encap(pubRecipient *ecdh.PublicKey) (sharedSecret []byte, encapPub []byte, err error) { + var privEph *ecdh.PrivateKey + if testingOnlyGenerateKey != nil { + privEph, err = testingOnlyGenerateKey() + } else { + privEph, err = dh.dh.GenerateKey(rand.Reader) + } + if err != nil { + return nil, nil, err + } + dhVal, err := privEph.ECDH(pubRecipient) + if err != nil { + return nil, nil, err + } + encPubEph := privEph.PublicKey().Bytes() + + encPubRecip := pubRecipient.Bytes() + kemContext := append(encPubEph, encPubRecip...) + + return dh.ExtractAndExpand(dhVal, kemContext), encPubEph, nil +} + +func (dh *dhKEM) Decap(encPubEph []byte, secRecipient *ecdh.PrivateKey) ([]byte, error) { + pubEph, err := dh.dh.NewPublicKey(encPubEph) + if err != nil { + return nil, err + } + dhVal, err := secRecipient.ECDH(pubEph) + if err != nil { + return nil, err + } + kemContext := append(encPubEph, secRecipient.PublicKey().Bytes()...) + + return dh.ExtractAndExpand(dhVal, kemContext), nil +} + +type context struct { + aead cipher.AEAD + + sharedSecret []byte + + suiteID []byte + + key []byte + baseNonce []byte + exporterSecret []byte + + seqNum uint128 +} + +type Sender struct { + *context +} + +type Receipient struct { + *context +} + +var aesGCMNew = func(key []byte) (cipher.AEAD, error) { + block, err := aes.NewCipher(key) + if err != nil { + return nil, err + } + return cipher.NewGCM(block) +} + +type AEADID uint16 + +const ( + AEAD_AES_128_GCM = 0x0001 + AEAD_AES_256_GCM = 0x0002 + AEAD_ChaCha20Poly1305 = 0x0003 +) + +var SupportedAEADs = map[uint16]struct { + keySize int + nonceSize int + aead func([]byte) (cipher.AEAD, error) +}{ + // RFC 9180, Section 7.3 + AEAD_AES_128_GCM: {keySize: 16, nonceSize: 12, aead: aesGCMNew}, + AEAD_AES_256_GCM: {keySize: 32, nonceSize: 12, aead: aesGCMNew}, + AEAD_ChaCha20Poly1305: {keySize: chacha20poly1305.KeySize, nonceSize: chacha20poly1305.NonceSize, aead: chacha20poly1305.New}, +} + +type KDFID uint16 + +const KDF_HKDF_SHA256 = 0x0001 + +var SupportedKDFs = map[uint16]func() *hkdfKDF{ + // RFC 9180, Section 7.2 + KDF_HKDF_SHA256: func() *hkdfKDF { return &hkdfKDF{crypto.SHA256} }, +} + +func newContext(sharedSecret []byte, kemID, kdfID, aeadID uint16, info []byte) (*context, error) { + sid := suiteID(kemID, kdfID, aeadID) + + kdfInit, ok := SupportedKDFs[kdfID] + if !ok { + return nil, errors.New("unsupported KDF id") + } + kdf := kdfInit() + + aeadInfo, ok := SupportedAEADs[aeadID] + if !ok { + return nil, errors.New("unsupported AEAD id") + } + + pskIDHash := kdf.LabeledExtract(sid, nil, "psk_id_hash", nil) + infoHash := kdf.LabeledExtract(sid, nil, "info_hash", info) + ksContext := append([]byte{0}, pskIDHash...) + ksContext = append(ksContext, infoHash...) + + secret := kdf.LabeledExtract(sid, sharedSecret, "secret", nil) + + key := kdf.LabeledExpand(sid, secret, "key", ksContext, uint16(aeadInfo.keySize) /* Nk - key size for AEAD */) + baseNonce := kdf.LabeledExpand(sid, secret, "base_nonce", ksContext, uint16(aeadInfo.nonceSize) /* Nn - nonce size for AEAD */) + exporterSecret := kdf.LabeledExpand(sid, secret, "exp", ksContext, uint16(kdf.hash.Size()) /* Nh - hash output size of the kdf*/) + + aead, err := aeadInfo.aead(key) + if err != nil { + return nil, err + } + + return &context{ + aead: aead, + sharedSecret: sharedSecret, + suiteID: sid, + key: key, + baseNonce: baseNonce, + exporterSecret: exporterSecret, + }, nil +} + +func SetupSender(kemID, kdfID, aeadID uint16, pub *ecdh.PublicKey, info []byte) ([]byte, *Sender, error) { + kem, err := newDHKem(kemID) + if err != nil { + return nil, nil, err + } + sharedSecret, encapsulatedKey, err := kem.Encap(pub) + if err != nil { + return nil, nil, err + } + + context, err := newContext(sharedSecret, kemID, kdfID, aeadID, info) + if err != nil { + return nil, nil, err + } + + return encapsulatedKey, &Sender{context}, nil +} + +func SetupReceipient(kemID, kdfID, aeadID uint16, priv *ecdh.PrivateKey, info, encPubEph []byte) (*Receipient, error) { + kem, err := newDHKem(kemID) + if err != nil { + return nil, err + } + sharedSecret, err := kem.Decap(encPubEph, priv) + if err != nil { + return nil, err + } + + context, err := newContext(sharedSecret, kemID, kdfID, aeadID, info) + if err != nil { + return nil, err + } + + return &Receipient{context}, nil +} + +func (ctx *context) nextNonce() []byte { + nonce := ctx.seqNum.bytes()[16-ctx.aead.NonceSize():] + for i := range ctx.baseNonce { + nonce[i] ^= ctx.baseNonce[i] + } + return nonce +} + +func (ctx *context) incrementNonce() { + // Message limit is, according to the RFC, 2^95+1, which + // is somewhat confusing, but we do as we're told. + if ctx.seqNum.bitLen() >= (ctx.aead.NonceSize()*8)-1 { + panic("message limit reached") + } + ctx.seqNum = ctx.seqNum.addOne() +} + +func (s *Sender) Seal(aad, plaintext []byte) ([]byte, error) { + ciphertext := s.aead.Seal(nil, s.nextNonce(), plaintext, aad) + s.incrementNonce() + return ciphertext, nil +} + +func (r *Receipient) Open(aad, ciphertext []byte) ([]byte, error) { + plaintext, err := r.aead.Open(nil, r.nextNonce(), ciphertext, aad) + if err != nil { + return nil, err + } + r.incrementNonce() + return plaintext, nil +} + +func suiteID(kemID, kdfID, aeadID uint16) []byte { + suiteID := make([]byte, 0, 4+2+2+2) + suiteID = append(suiteID, []byte("HPKE")...) + suiteID = byteorder.BEAppendUint16(suiteID, kemID) + suiteID = byteorder.BEAppendUint16(suiteID, kdfID) + suiteID = byteorder.BEAppendUint16(suiteID, aeadID) + return suiteID +} + +func ParseHPKEPublicKey(kemID uint16, bytes []byte) (*ecdh.PublicKey, error) { + kemInfo, ok := SupportedKEMs[kemID] + if !ok { + return nil, errors.New("unsupported KEM id") + } + return kemInfo.curve.NewPublicKey(bytes) +} + +func ParseHPKEPrivateKey(kemID uint16, bytes []byte) (*ecdh.PrivateKey, error) { + kemInfo, ok := SupportedKEMs[kemID] + if !ok { + return nil, errors.New("unsupported KEM id") + } + return kemInfo.curve.NewPrivateKey(bytes) +} + +type uint128 struct { + hi, lo uint64 +} + +func (u uint128) addOne() uint128 { + lo, carry := bits.Add64(u.lo, 1, 0) + return uint128{u.hi + carry, lo} +} + +func (u uint128) bitLen() int { + return bits.Len64(u.hi) + bits.Len64(u.lo) +} + +func (u uint128) bytes() []byte { + b := make([]byte, 16) + byteorder.BEPutUint64(b[0:], u.hi) + byteorder.BEPutUint64(b[8:], u.lo) + return b +} diff --git a/backend/vendor/github.com/enetx/utls/internal/quicvarint/protocol/protocol.go b/backend/vendor/github.com/enetx/utls/internal/quicvarint/protocol/protocol.go new file mode 100644 index 0000000..3cbc342 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/internal/quicvarint/protocol/protocol.go @@ -0,0 +1,157 @@ +// Copyright 2024 The quic-go Authors. All rights reserved. +// Use of this source code is governed by a MIT-style +// license that can be found in the LICENSE file of +// the quic-go repository. + +package protocol + +import ( + "fmt" + "time" +) + +// The PacketType is the Long Header Type +type PacketType uint8 + +const ( + // PacketTypeInitial is the packet type of an Initial packet + PacketTypeInitial PacketType = 1 + iota + // PacketTypeRetry is the packet type of a Retry packet + PacketTypeRetry + // PacketTypeHandshake is the packet type of a Handshake packet + PacketTypeHandshake + // PacketType0RTT is the packet type of a 0-RTT packet + PacketType0RTT +) + +func (t PacketType) String() string { + switch t { + case PacketTypeInitial: + return "Initial" + case PacketTypeRetry: + return "Retry" + case PacketTypeHandshake: + return "Handshake" + case PacketType0RTT: + return "0-RTT Protected" + default: + return fmt.Sprintf("unknown packet type: %d", t) + } +} + +type ECN uint8 + +const ( + ECNUnsupported ECN = iota + ECNNon // 00 + ECT1 // 01 + ECT0 // 10 + ECNCE // 11 +) + +func ParseECNHeaderBits(bits byte) ECN { + switch bits { + case 0: + return ECNNon + case 0b00000010: + return ECT0 + case 0b00000001: + return ECT1 + case 0b00000011: + return ECNCE + default: + panic("invalid ECN bits") + } +} + +func (e ECN) ToHeaderBits() byte { + //nolint:exhaustive // There are only 4 values. + switch e { + case ECNNon: + return 0 + case ECT0: + return 0b00000010 + case ECT1: + return 0b00000001 + case ECNCE: + return 0b00000011 + default: + panic("ECN unsupported") + } +} + +func (e ECN) String() string { + switch e { + case ECNUnsupported: + return "ECN unsupported" + case ECNNon: + return "Not-ECT" + case ECT1: + return "ECT(1)" + case ECT0: + return "ECT(0)" + case ECNCE: + return "CE" + default: + return fmt.Sprintf("invalid ECN value: %d", e) + } +} + +// A ByteCount in QUIC +type ByteCount int64 + +// MaxByteCount is the maximum value of a ByteCount +const MaxByteCount = ByteCount(1<<62 - 1) + +// InvalidByteCount is an invalid byte count +const InvalidByteCount ByteCount = -1 + +// A StatelessResetToken is a stateless reset token. +type StatelessResetToken [16]byte + +// MaxPacketBufferSize maximum packet size of any QUIC packet, based on +// ethernet's max size, minus the IP and UDP headers. IPv6 has a 40 byte header, +// UDP adds an additional 8 bytes. This is a total overhead of 48 bytes. +// Ethernet's max packet size is 1500 bytes, 1500 - 48 = 1452. +const MaxPacketBufferSize = 1452 + +// MaxLargePacketBufferSize is used when using GSO +const MaxLargePacketBufferSize = 20 * 1024 + +// MinInitialPacketSize is the minimum size an Initial packet is required to have. +const MinInitialPacketSize = 1200 + +// MinUnknownVersionPacketSize is the minimum size a packet with an unknown version +// needs to have in order to trigger a Version Negotiation packet. +const MinUnknownVersionPacketSize = MinInitialPacketSize + +// MinStatelessResetSize is the minimum size of a stateless reset packet that we send +const MinStatelessResetSize = 1 /* first byte */ + 20 /* max. conn ID length */ + 4 /* max. packet number length */ + 1 /* min. payload length */ + 16 /* token */ + +// MinConnectionIDLenInitial is the minimum length of the destination connection ID on an Initial packet. +const MinConnectionIDLenInitial = 8 + +// DefaultAckDelayExponent is the default ack delay exponent +const DefaultAckDelayExponent = 3 + +// DefaultActiveConnectionIDLimit is the default active connection ID limit +const DefaultActiveConnectionIDLimit = 2 + +// MaxAckDelayExponent is the maximum ack delay exponent +const MaxAckDelayExponent = 20 + +// DefaultMaxAckDelay is the default max_ack_delay +const DefaultMaxAckDelay = 25 * time.Millisecond + +// MaxMaxAckDelay is the maximum max_ack_delay +const MaxMaxAckDelay = (1<<14 - 1) * time.Millisecond + +// MaxConnIDLen is the maximum length of the connection ID +const MaxConnIDLen = 20 + +// InvalidPacketLimitAES is the maximum number of packets that we can fail to decrypt when using +// AEAD_AES_128_GCM or AEAD_AES_265_GCM. +const InvalidPacketLimitAES = 1 << 52 + +// InvalidPacketLimitChaCha is the maximum number of packets that we can fail to decrypt when using AEAD_CHACHA20_POLY1305. +const InvalidPacketLimitChaCha = 1 << 36 diff --git a/backend/vendor/github.com/enetx/utls/internal/quicvarint/varint.go b/backend/vendor/github.com/enetx/utls/internal/quicvarint/varint.go new file mode 100644 index 0000000..7e4dbb7 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/internal/quicvarint/varint.go @@ -0,0 +1,146 @@ +// Copyright 2024 The quic-go Authors. All rights reserved. +// Use of this source code is governed by a MIT-style +// license that can be found in the LICENSE file of +// the quic-go repository. + +package quicvarint + +import ( + "fmt" + "io" + + "github.com/enetx/utls/internal/quicvarint/protocol" +) + +// taken from the QUIC draft +const ( + // Min is the minimum value allowed for a QUIC varint. + Min = 0 + + // Max is the maximum allowed value for a QUIC varint (2^62-1). + Max = maxVarInt8 + + maxVarInt1 = 63 + maxVarInt2 = 16383 + maxVarInt4 = 1073741823 + maxVarInt8 = 4611686018427387903 +) + +// Read reads a number in the QUIC varint format from r. +func Read(r io.ByteReader) (uint64, error) { + firstByte, err := r.ReadByte() + if err != nil { + return 0, err + } + // the first two bits of the first byte encode the length + len := 1 << ((firstByte & 0xc0) >> 6) + b1 := firstByte & (0xff - 0xc0) + if len == 1 { + return uint64(b1), nil + } + b2, err := r.ReadByte() + if err != nil { + return 0, err + } + if len == 2 { + return uint64(b2) + uint64(b1)<<8, nil + } + b3, err := r.ReadByte() + if err != nil { + return 0, err + } + b4, err := r.ReadByte() + if err != nil { + return 0, err + } + if len == 4 { + return uint64(b4) + uint64(b3)<<8 + uint64(b2)<<16 + uint64(b1)<<24, nil + } + b5, err := r.ReadByte() + if err != nil { + return 0, err + } + b6, err := r.ReadByte() + if err != nil { + return 0, err + } + b7, err := r.ReadByte() + if err != nil { + return 0, err + } + b8, err := r.ReadByte() + if err != nil { + return 0, err + } + return uint64(b8) + uint64(b7)<<8 + uint64(b6)<<16 + uint64(b5)<<24 + uint64(b4)<<32 + uint64(b3)<<40 + uint64(b2)<<48 + uint64(b1)<<56, nil +} + +// Append appends i in the QUIC varint format. +func Append(b []byte, i uint64) []byte { + if i <= maxVarInt1 { + return append(b, uint8(i)) + } + if i <= maxVarInt2 { + return append(b, []byte{uint8(i>>8) | 0x40, uint8(i)}...) + } + if i <= maxVarInt4 { + return append(b, []byte{uint8(i>>24) | 0x80, uint8(i >> 16), uint8(i >> 8), uint8(i)}...) + } + if i <= maxVarInt8 { + return append(b, []byte{ + uint8(i>>56) | 0xc0, uint8(i >> 48), uint8(i >> 40), uint8(i >> 32), + uint8(i >> 24), uint8(i >> 16), uint8(i >> 8), uint8(i), + }...) + } + panic(fmt.Sprintf("%#x doesn't fit into 62 bits", i)) +} + +// AppendWithLen append i in the QUIC varint format with the desired length. +func AppendWithLen(b []byte, i uint64, length protocol.ByteCount) []byte { + if length != 1 && length != 2 && length != 4 && length != 8 { + panic("invalid varint length") + } + l := Len(i) + if l == length { + return Append(b, i) + } + if l > length { + panic(fmt.Sprintf("cannot encode %d in %d bytes", i, length)) + } + if length == 2 { + b = append(b, 0b01000000) + } else if length == 4 { + b = append(b, 0b10000000) + } else if length == 8 { + b = append(b, 0b11000000) + } + for j := protocol.ByteCount(1); j < length-l; j++ { + b = append(b, 0) + } + for j := protocol.ByteCount(0); j < l; j++ { + b = append(b, uint8(i>>(8*(l-1-j)))) + } + return b +} + +// Len determines the number of bytes that will be needed to write the number i. +func Len(i uint64) protocol.ByteCount { + if i <= maxVarInt1 { + return 1 + } + if i <= maxVarInt2 { + return 2 + } + if i <= maxVarInt4 { + return 4 + } + if i <= maxVarInt8 { + return 8 + } + // Don't use a fmt.Sprintf here to format the error message. + // The function would then exceed the inlining budget. + panic(struct { + message string + num uint64 + }{"value doesn't fit into 62 bits: ", i}) +} diff --git a/backend/vendor/github.com/enetx/utls/internal/tls12/tls12.go b/backend/vendor/github.com/enetx/utls/internal/tls12/tls12.go new file mode 100644 index 0000000..b456ed1 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/internal/tls12/tls12.go @@ -0,0 +1,69 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls12 + +import ( + "crypto/hmac" + "hash" +) + +// PRF implements the TLS 1.2 pseudo-random function, as defined in RFC 5246, +// Section 5 and allowed by SP 800-135, Revision 1, Section 4.2.2. +func PRF(hash func() hash.Hash, secret []byte, label string, seed []byte, keyLen int) []byte { + labelAndSeed := make([]byte, len(label)+len(seed)) + copy(labelAndSeed, label) + copy(labelAndSeed[len(label):], seed) + + result := make([]byte, keyLen) + pHash(hash, result, secret, labelAndSeed) + return result +} + +// pHash implements the P_hash function, as defined in RFC 5246, Section 5. +func pHash(hash func() hash.Hash, result, secret, seed []byte) { + h := hmac.New(hash, secret) + h.Write(seed) + a := h.Sum(nil) + + for len(result) > 0 { + h.Reset() + h.Write(a) + h.Write(seed) + b := h.Sum(nil) + n := copy(result, b) + result = result[n:] + + h.Reset() + h.Write(a) + a = h.Sum(nil) + } +} + +const masterSecretLength = 48 +const extendedMasterSecretLabel = "extended master secret" + +// MasterSecret implements the TLS 1.2 extended master secret derivation, as +// defined in RFC 7627 and allowed by SP 800-135, Revision 1, Section 4.2.2. +func MasterSecret(hash func() hash.Hash, preMasterSecret, transcript []byte) []byte { + // [uTLS SECTION BEGIN] + // "The TLS 1.2 KDF is an approved KDF when the following conditions are + // satisfied: [...] (3) P_HASH uses either SHA-256, SHA-384 or SHA-512." + // h := hash() + // switch any(h).(type) { + // case *sha256.Digest: + // if h.Size() != 32 { + // fips140.RecordNonApproved() + // } + // case *sha512.Digest: + // if h.Size() != 46 && h.Size() != 64 { + // fips140.RecordNonApproved() + // } + // default: + // fips140.RecordNonApproved() + // } + // [uTLS SECTION END] + + return PRF(hash, preMasterSecret, extendedMasterSecretLabel, transcript, masterSecretLength) +} diff --git a/backend/vendor/github.com/enetx/utls/internal/tls13/tls13.go b/backend/vendor/github.com/enetx/utls/internal/tls13/tls13.go new file mode 100644 index 0000000..1184823 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/internal/tls13/tls13.go @@ -0,0 +1,179 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package tls13 implements the TLS 1.3 Key Schedule as specified in RFC 8446, +// Section 7.1 and allowed by FIPS 140-3 IG 2.4.B Resolution 7. +package tls13 + +import ( + fips140 "hash" + + "github.com/enetx/utls/internal/byteorder" + "github.com/enetx/utls/internal/hkdf" +) + +// We don't set the service indicator in this package but we delegate that to +// the underlying functions because the TLS 1.3 KDF does not have a standard of +// its own. + +// ExpandLabel implements HKDF-Expand-Label from RFC 8446, Section 7.1. +func ExpandLabel[H fips140.Hash](hash func() H, secret []byte, label string, context []byte, length int) []byte { + if len("tls13 ")+len(label) > 255 || len(context) > 255 { + // It should be impossible for this to panic: labels are fixed strings, + // and context is either a fixed-length computed hash, or parsed from a + // field which has the same length limitation. + // + // Another reasonable approach might be to return a randomized slice if + // we encounter an error, which would break the connection, but avoid + // panicking. This would perhaps be safer but significantly more + // confusing to users. + panic("tls13: label or context too long") + } + hkdfLabel := make([]byte, 0, 2+1+len("tls13 ")+len(label)+1+len(context)) + hkdfLabel = byteorder.BEAppendUint16(hkdfLabel, uint16(length)) + hkdfLabel = append(hkdfLabel, byte(len("tls13 ")+len(label))) + hkdfLabel = append(hkdfLabel, "tls13 "...) + hkdfLabel = append(hkdfLabel, label...) + hkdfLabel = append(hkdfLabel, byte(len(context))) + hkdfLabel = append(hkdfLabel, context...) + return hkdf.Expand(hash, secret, string(hkdfLabel), length) +} + +func extract[H fips140.Hash](hash func() H, newSecret, currentSecret []byte) []byte { + if newSecret == nil { + newSecret = make([]byte, hash().Size()) + } + return hkdf.Extract(hash, newSecret, currentSecret) +} + +func deriveSecret[H fips140.Hash](hash func() H, secret []byte, label string, transcript fips140.Hash) []byte { + if transcript == nil { + transcript = hash() + } + return ExpandLabel(hash, secret, label, transcript.Sum(nil), transcript.Size()) +} + +const ( + resumptionBinderLabel = "res binder" + clientEarlyTrafficLabel = "c e traffic" + clientHandshakeTrafficLabel = "c hs traffic" + serverHandshakeTrafficLabel = "s hs traffic" + clientApplicationTrafficLabel = "c ap traffic" + serverApplicationTrafficLabel = "s ap traffic" + earlyExporterLabel = "e exp master" + exporterLabel = "exp master" + resumptionLabel = "res master" +) + +type EarlySecret struct { + secret []byte + hash func() fips140.Hash +} + +func NewEarlySecret[H fips140.Hash](hash func() H, psk []byte) *EarlySecret { + return &EarlySecret{ + secret: extract(hash, psk, nil), + hash: func() fips140.Hash { return hash() }, + } +} + +func (s *EarlySecret) ResumptionBinderKey() []byte { + return deriveSecret(s.hash, s.secret, resumptionBinderLabel, nil) +} + +// ClientEarlyTrafficSecret derives the client_early_traffic_secret from the +// early secret and the transcript up to the ClientHello. +func (s *EarlySecret) ClientEarlyTrafficSecret(transcript fips140.Hash) []byte { + return deriveSecret(s.hash, s.secret, clientEarlyTrafficLabel, transcript) +} + +type HandshakeSecret struct { + secret []byte + hash func() fips140.Hash +} + +func (s *EarlySecret) HandshakeSecret(sharedSecret []byte) *HandshakeSecret { + derived := deriveSecret(s.hash, s.secret, "derived", nil) + return &HandshakeSecret{ + secret: extract(s.hash, sharedSecret, derived), + hash: s.hash, + } +} + +// ClientHandshakeTrafficSecret derives the client_handshake_traffic_secret from +// the handshake secret and the transcript up to the ServerHello. +func (s *HandshakeSecret) ClientHandshakeTrafficSecret(transcript fips140.Hash) []byte { + return deriveSecret(s.hash, s.secret, clientHandshakeTrafficLabel, transcript) +} + +// ServerHandshakeTrafficSecret derives the server_handshake_traffic_secret from +// the handshake secret and the transcript up to the ServerHello. +func (s *HandshakeSecret) ServerHandshakeTrafficSecret(transcript fips140.Hash) []byte { + return deriveSecret(s.hash, s.secret, serverHandshakeTrafficLabel, transcript) +} + +type MasterSecret struct { + secret []byte + hash func() fips140.Hash +} + +func (s *HandshakeSecret) MasterSecret() *MasterSecret { + derived := deriveSecret(s.hash, s.secret, "derived", nil) + return &MasterSecret{ + secret: extract(s.hash, nil, derived), + hash: s.hash, + } +} + +// ClientApplicationTrafficSecret derives the client_application_traffic_secret_0 +// from the master secret and the transcript up to the server Finished. +func (s *MasterSecret) ClientApplicationTrafficSecret(transcript fips140.Hash) []byte { + return deriveSecret(s.hash, s.secret, clientApplicationTrafficLabel, transcript) +} + +// ServerApplicationTrafficSecret derives the server_application_traffic_secret_0 +// from the master secret and the transcript up to the server Finished. +func (s *MasterSecret) ServerApplicationTrafficSecret(transcript fips140.Hash) []byte { + return deriveSecret(s.hash, s.secret, serverApplicationTrafficLabel, transcript) +} + +// ResumptionMasterSecret derives the resumption_master_secret from the master secret +// and the transcript up to the client Finished. +func (s *MasterSecret) ResumptionMasterSecret(transcript fips140.Hash) []byte { + return deriveSecret(s.hash, s.secret, resumptionLabel, transcript) +} + +type ExporterMasterSecret struct { + secret []byte + hash func() fips140.Hash +} + +// ExporterMasterSecret derives the exporter_master_secret from the master secret +// and the transcript up to the server Finished. +func (s *MasterSecret) ExporterMasterSecret(transcript fips140.Hash) *ExporterMasterSecret { + return &ExporterMasterSecret{ + secret: deriveSecret(s.hash, s.secret, exporterLabel, transcript), + hash: s.hash, + } +} + +// EarlyExporterMasterSecret derives the exporter_master_secret from the early secret +// and the transcript up to the ClientHello. +func (s *EarlySecret) EarlyExporterMasterSecret(transcript fips140.Hash) *ExporterMasterSecret { + return &ExporterMasterSecret{ + secret: deriveSecret(s.hash, s.secret, earlyExporterLabel, transcript), + hash: s.hash, + } +} + +func (s *ExporterMasterSecret) Exporter(label string, context []byte, length int) []byte { + secret := deriveSecret(s.hash, s.secret, label, nil) + h := s.hash() + h.Write(context) + return ExpandLabel(s.hash, secret, "exporter", h.Sum(nil), length) +} + +func TestingOnlyExporterSecret(s *ExporterMasterSecret) []byte { + return s.secret +} diff --git a/backend/vendor/github.com/enetx/utls/internal/tls13/u_tls13.go b/backend/vendor/github.com/enetx/utls/internal/tls13/u_tls13.go new file mode 100644 index 0000000..9e5a682 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/internal/tls13/u_tls13.go @@ -0,0 +1,31 @@ +package tls13 + +import fips140 "hash" + +func NewEarlySecretFromSecret[H fips140.Hash](hash func() H, secret []byte) *EarlySecret { + return &EarlySecret{ + secret: secret, + hash: func() fips140.Hash { return hash() }, + } +} + +func (s *EarlySecret) Secret() []byte { + if s != nil { + return s.secret + } + return nil +} + +func NewMasterSecretFromSecret[H fips140.Hash](hash func() H, secret []byte) *MasterSecret { + return &MasterSecret{ + secret: secret, + hash: func() fips140.Hash { return hash() }, + } +} + +func (s *MasterSecret) Secret() []byte { + if s != nil { + return s.secret + } + return nil +} diff --git a/backend/vendor/github.com/enetx/utls/key_agreement.go b/backend/vendor/github.com/enetx/utls/key_agreement.go new file mode 100644 index 0000000..3e96242 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/key_agreement.go @@ -0,0 +1,366 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto" + "crypto/ecdh" + "crypto/md5" + "crypto/rsa" + "crypto/sha1" + "crypto/x509" + "errors" + "fmt" + "io" +) + +// A keyAgreement implements the client and server side of a TLS 1.0–1.2 key +// agreement protocol by generating and processing key exchange messages. +type keyAgreement interface { + // On the server side, the first two methods are called in order. + + // In the case that the key agreement protocol doesn't use a + // ServerKeyExchange message, generateServerKeyExchange can return nil, + // nil. + generateServerKeyExchange(*Config, *Certificate, *clientHelloMsg, *serverHelloMsg) (*serverKeyExchangeMsg, error) + processClientKeyExchange(*Config, *Certificate, *clientKeyExchangeMsg, uint16) ([]byte, error) + + // On the client side, the next two methods are called in order. + + // This method may not be called if the server doesn't send a + // ServerKeyExchange message. + processServerKeyExchange(*Config, *clientHelloMsg, *serverHelloMsg, *x509.Certificate, *serverKeyExchangeMsg) error + generateClientKeyExchange(*Config, *clientHelloMsg, *x509.Certificate) ([]byte, *clientKeyExchangeMsg, error) +} + +var errClientKeyExchange = errors.New("tls: invalid ClientKeyExchange message") +var errServerKeyExchange = errors.New("tls: invalid ServerKeyExchange message") + +// rsaKeyAgreement implements the standard TLS key agreement where the client +// encrypts the pre-master secret to the server's public key. +type rsaKeyAgreement struct{} + +func (ka rsaKeyAgreement) generateServerKeyExchange(config *Config, cert *Certificate, clientHello *clientHelloMsg, hello *serverHelloMsg) (*serverKeyExchangeMsg, error) { + return nil, nil +} + +func (ka rsaKeyAgreement) processClientKeyExchange(config *Config, cert *Certificate, ckx *clientKeyExchangeMsg, version uint16) ([]byte, error) { + if len(ckx.ciphertext) < 2 { + return nil, errClientKeyExchange + } + ciphertextLen := int(ckx.ciphertext[0])<<8 | int(ckx.ciphertext[1]) + if ciphertextLen != len(ckx.ciphertext)-2 { + return nil, errClientKeyExchange + } + ciphertext := ckx.ciphertext[2:] + + priv, ok := cert.PrivateKey.(crypto.Decrypter) + if !ok { + return nil, errors.New("tls: certificate private key does not implement crypto.Decrypter") + } + // Perform constant time RSA PKCS #1 v1.5 decryption + preMasterSecret, err := priv.Decrypt(config.rand(), ciphertext, &rsa.PKCS1v15DecryptOptions{SessionKeyLen: 48}) + if err != nil { + return nil, err + } + // We don't check the version number in the premaster secret. For one, + // by checking it, we would leak information about the validity of the + // encrypted pre-master secret. Secondly, it provides only a small + // benefit against a downgrade attack and some implementations send the + // wrong version anyway. See the discussion at the end of section + // 7.4.7.1 of RFC 4346. + return preMasterSecret, nil +} + +func (ka rsaKeyAgreement) processServerKeyExchange(config *Config, clientHello *clientHelloMsg, serverHello *serverHelloMsg, cert *x509.Certificate, skx *serverKeyExchangeMsg) error { + return errors.New("tls: unexpected ServerKeyExchange") +} + +func (ka rsaKeyAgreement) generateClientKeyExchange(config *Config, clientHello *clientHelloMsg, cert *x509.Certificate) ([]byte, *clientKeyExchangeMsg, error) { + preMasterSecret := make([]byte, 48) + preMasterSecret[0] = byte(clientHello.vers >> 8) + preMasterSecret[1] = byte(clientHello.vers) + _, err := io.ReadFull(config.rand(), preMasterSecret[2:]) + if err != nil { + return nil, nil, err + } + + rsaKey, ok := cert.PublicKey.(*rsa.PublicKey) + if !ok { + return nil, nil, errors.New("tls: server certificate contains incorrect key type for selected ciphersuite") + } + encrypted, err := rsa.EncryptPKCS1v15(config.rand(), rsaKey, preMasterSecret) + if err != nil { + return nil, nil, err + } + ckx := new(clientKeyExchangeMsg) + ckx.ciphertext = make([]byte, len(encrypted)+2) + ckx.ciphertext[0] = byte(len(encrypted) >> 8) + ckx.ciphertext[1] = byte(len(encrypted)) + copy(ckx.ciphertext[2:], encrypted) + return preMasterSecret, ckx, nil +} + +// sha1Hash calculates a SHA1 hash over the given byte slices. +func sha1Hash(slices [][]byte) []byte { + hsha1 := sha1.New() + for _, slice := range slices { + hsha1.Write(slice) + } + return hsha1.Sum(nil) +} + +// md5SHA1Hash implements TLS 1.0's hybrid hash function which consists of the +// concatenation of an MD5 and SHA1 hash. +func md5SHA1Hash(slices [][]byte) []byte { + md5sha1 := make([]byte, md5.Size+sha1.Size) + hmd5 := md5.New() + for _, slice := range slices { + hmd5.Write(slice) + } + copy(md5sha1, hmd5.Sum(nil)) + copy(md5sha1[md5.Size:], sha1Hash(slices)) + return md5sha1 +} + +// hashForServerKeyExchange hashes the given slices and returns their digest +// using the given hash function (for TLS 1.2) or using a default based on +// the sigType (for earlier TLS versions). For Ed25519 signatures, which don't +// do pre-hashing, it returns the concatenation of the slices. +func hashForServerKeyExchange(sigType uint8, hashFunc crypto.Hash, version uint16, slices ...[]byte) []byte { + if sigType == signatureEd25519 { + var signed []byte + for _, slice := range slices { + signed = append(signed, slice...) + } + return signed + } + if version >= VersionTLS12 { + h := hashFunc.New() + for _, slice := range slices { + h.Write(slice) + } + digest := h.Sum(nil) + return digest + } + if sigType == signatureECDSA { + return sha1Hash(slices) + } + return md5SHA1Hash(slices) +} + +// ecdheKeyAgreement implements a TLS key agreement where the server +// generates an ephemeral EC public/private key pair and signs it. The +// pre-master secret is then calculated using ECDH. The signature may +// be ECDSA, Ed25519 or RSA. +type ecdheKeyAgreement struct { + version uint16 + isRSA bool + key *ecdh.PrivateKey + + // ckx and preMasterSecret are generated in processServerKeyExchange + // and returned in generateClientKeyExchange. + ckx *clientKeyExchangeMsg + preMasterSecret []byte +} + +func (ka *ecdheKeyAgreement) generateServerKeyExchange(config *Config, cert *Certificate, clientHello *clientHelloMsg, hello *serverHelloMsg) (*serverKeyExchangeMsg, error) { + var curveID CurveID + for _, c := range clientHello.supportedCurves { + if config.supportsCurve(ka.version, c) { + curveID = c + break + } + } + + if curveID == 0 { + return nil, errors.New("tls: no supported elliptic curves offered") + } + if _, ok := curveForCurveID(curveID); !ok { + return nil, errors.New("tls: CurvePreferences includes unsupported curve") + } + + key, err := generateECDHEKey(config.rand(), curveID) + if err != nil { + return nil, err + } + ka.key = key + + // See RFC 4492, Section 5.4. + ecdhePublic := key.PublicKey().Bytes() + serverECDHEParams := make([]byte, 1+2+1+len(ecdhePublic)) + serverECDHEParams[0] = 3 // named curve + serverECDHEParams[1] = byte(curveID >> 8) + serverECDHEParams[2] = byte(curveID) + serverECDHEParams[3] = byte(len(ecdhePublic)) + copy(serverECDHEParams[4:], ecdhePublic) + + priv, ok := cert.PrivateKey.(crypto.Signer) + if !ok { + return nil, fmt.Errorf("tls: certificate private key of type %T does not implement crypto.Signer", cert.PrivateKey) + } + + var signatureAlgorithm SignatureScheme + var sigType uint8 + var sigHash crypto.Hash + if ka.version >= VersionTLS12 { + signatureAlgorithm, err = selectSignatureScheme(ka.version, cert, clientHello.supportedSignatureAlgorithms) + if err != nil { + return nil, err + } + sigType, sigHash, err = typeAndHashFromSignatureScheme(signatureAlgorithm) + if err != nil { + return nil, err + } + } else { + sigType, sigHash, err = legacyTypeAndHashFromPublicKey(priv.Public()) + if err != nil { + return nil, err + } + } + if (sigType == signaturePKCS1v15 || sigType == signatureRSAPSS) != ka.isRSA { + return nil, errors.New("tls: certificate cannot be used with the selected cipher suite") + } + + signed := hashForServerKeyExchange(sigType, sigHash, ka.version, clientHello.random, hello.random, serverECDHEParams) + + signOpts := crypto.SignerOpts(sigHash) + if sigType == signatureRSAPSS { + signOpts = &rsa.PSSOptions{SaltLength: rsa.PSSSaltLengthEqualsHash, Hash: sigHash} + } + sig, err := priv.Sign(config.rand(), signed, signOpts) + if err != nil { + return nil, errors.New("tls: failed to sign ECDHE parameters: " + err.Error()) + } + + skx := new(serverKeyExchangeMsg) + sigAndHashLen := 0 + if ka.version >= VersionTLS12 { + sigAndHashLen = 2 + } + skx.key = make([]byte, len(serverECDHEParams)+sigAndHashLen+2+len(sig)) + copy(skx.key, serverECDHEParams) + k := skx.key[len(serverECDHEParams):] + if ka.version >= VersionTLS12 { + k[0] = byte(signatureAlgorithm >> 8) + k[1] = byte(signatureAlgorithm) + k = k[2:] + } + k[0] = byte(len(sig) >> 8) + k[1] = byte(len(sig)) + copy(k[2:], sig) + + return skx, nil +} + +func (ka *ecdheKeyAgreement) processClientKeyExchange(config *Config, cert *Certificate, ckx *clientKeyExchangeMsg, version uint16) ([]byte, error) { + if len(ckx.ciphertext) == 0 || int(ckx.ciphertext[0]) != len(ckx.ciphertext)-1 { + return nil, errClientKeyExchange + } + + peerKey, err := ka.key.Curve().NewPublicKey(ckx.ciphertext[1:]) + if err != nil { + return nil, errClientKeyExchange + } + preMasterSecret, err := ka.key.ECDH(peerKey) + if err != nil { + return nil, errClientKeyExchange + } + + return preMasterSecret, nil +} + +func (ka *ecdheKeyAgreement) processServerKeyExchange(config *Config, clientHello *clientHelloMsg, serverHello *serverHelloMsg, cert *x509.Certificate, skx *serverKeyExchangeMsg) error { + if len(skx.key) < 4 { + return errServerKeyExchange + } + if skx.key[0] != 3 { // named curve + return errors.New("tls: server selected unsupported curve") + } + curveID := CurveID(skx.key[1])<<8 | CurveID(skx.key[2]) + + publicLen := int(skx.key[3]) + if publicLen+4 > len(skx.key) { + return errServerKeyExchange + } + serverECDHEParams := skx.key[:4+publicLen] + publicKey := serverECDHEParams[4:] + + sig := skx.key[4+publicLen:] + if len(sig) < 2 { + return errServerKeyExchange + } + + if _, ok := curveForCurveID(curveID); !ok { + return errors.New("tls: server selected unsupported curve") + } + + key, err := generateECDHEKey(config.rand(), curveID) + if err != nil { + return err + } + ka.key = key + + peerKey, err := key.Curve().NewPublicKey(publicKey) + if err != nil { + return errServerKeyExchange + } + ka.preMasterSecret, err = key.ECDH(peerKey) + if err != nil { + return errServerKeyExchange + } + + ourPublicKey := key.PublicKey().Bytes() + ka.ckx = new(clientKeyExchangeMsg) + ka.ckx.ciphertext = make([]byte, 1+len(ourPublicKey)) + ka.ckx.ciphertext[0] = byte(len(ourPublicKey)) + copy(ka.ckx.ciphertext[1:], ourPublicKey) + + var sigType uint8 + var sigHash crypto.Hash + if ka.version >= VersionTLS12 { + signatureAlgorithm := SignatureScheme(sig[0])<<8 | SignatureScheme(sig[1]) + sig = sig[2:] + if len(sig) < 2 { + return errServerKeyExchange + } + + if !isSupportedSignatureAlgorithm(signatureAlgorithm, clientHello.supportedSignatureAlgorithms) { + return errors.New("tls: certificate used with invalid signature algorithm") + } + sigType, sigHash, err = typeAndHashFromSignatureScheme(signatureAlgorithm) + if err != nil { + return err + } + } else { + sigType, sigHash, err = legacyTypeAndHashFromPublicKey(cert.PublicKey) + if err != nil { + return err + } + } + if (sigType == signaturePKCS1v15 || sigType == signatureRSAPSS) != ka.isRSA { + return errServerKeyExchange + } + + sigLen := int(sig[0])<<8 | int(sig[1]) + if sigLen+2 != len(sig) { + return errServerKeyExchange + } + sig = sig[2:] + + signed := hashForServerKeyExchange(sigType, sigHash, ka.version, clientHello.random, serverHello.random, serverECDHEParams) + if err := verifyHandshakeSignature(sigType, cert.PublicKey, sigHash, signed, sig); err != nil { + return errors.New("tls: invalid signature by the server certificate: " + err.Error()) + } + return nil +} + +func (ka *ecdheKeyAgreement) generateClientKeyExchange(config *Config, clientHello *clientHelloMsg, cert *x509.Certificate) ([]byte, *clientKeyExchangeMsg, error) { + if ka.ckx == nil { + return nil, nil, errors.New("tls: missing ServerKeyExchange message") + } + + return ka.preMasterSecret, ka.ckx, nil +} diff --git a/backend/vendor/github.com/enetx/utls/key_schedule.go b/backend/vendor/github.com/enetx/utls/key_schedule.go new file mode 100644 index 0000000..90dc5a8 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/key_schedule.go @@ -0,0 +1,101 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto/ecdh" + "crypto/hmac" + "crypto/mlkem" + "errors" + "hash" + "io" + + "github.com/enetx/utls/internal/tls13" +) + +// This file contains the functions necessary to compute the TLS 1.3 key +// schedule. See RFC 8446, Section 7. + +// nextTrafficSecret generates the next traffic secret, given the current one, +// according to RFC 8446, Section 7.2. +func (c *cipherSuiteTLS13) nextTrafficSecret(trafficSecret []byte) []byte { + return tls13.ExpandLabel(c.hash.New, trafficSecret, "traffic upd", nil, c.hash.Size()) +} + +// trafficKey generates traffic keys according to RFC 8446, Section 7.3. +func (c *cipherSuiteTLS13) trafficKey(trafficSecret []byte) (key, iv []byte) { + key = tls13.ExpandLabel(c.hash.New, trafficSecret, "key", nil, c.keyLen) + iv = tls13.ExpandLabel(c.hash.New, trafficSecret, "iv", nil, aeadNonceLength) + return +} + +// finishedHash generates the Finished verify_data or PskBinderEntry according +// to RFC 8446, Section 4.4.4. See sections 4.4 and 4.2.11.2 for the baseKey +// selection. +func (c *cipherSuiteTLS13) finishedHash(baseKey []byte, transcript hash.Hash) []byte { + finishedKey := tls13.ExpandLabel(c.hash.New, baseKey, "finished", nil, c.hash.Size()) + verifyData := hmac.New(c.hash.New, finishedKey) + verifyData.Write(transcript.Sum(nil)) + return verifyData.Sum(nil) +} + +// exportKeyingMaterial implements RFC5705 exporters for TLS 1.3 according to +// RFC 8446, Section 7.5. +func (c *cipherSuiteTLS13) exportKeyingMaterial(s *tls13.MasterSecret, transcript hash.Hash) func(string, []byte, int) ([]byte, error) { + expMasterSecret := s.ExporterMasterSecret(transcript) + return func(label string, context []byte, length int) ([]byte, error) { + return expMasterSecret.Exporter(label, context, length), nil + } +} + +type keySharePrivateKeys struct { + curveID CurveID + ecdhe *ecdh.PrivateKey + mlkem *mlkem.DecapsulationKey768 + mlkemEcdhe *ecdh.PrivateKey // [uTLS] seperate ecdhe key for pq keyshare in line with Chrome, instead of reusing ecdhe key like stdlib +} + +const x25519PublicKeySize = 32 + +// generateECDHEKey returns a PrivateKey that implements Diffie-Hellman +// according to RFC 8446, Section 4.2.8.2. +func generateECDHEKey(rand io.Reader, curveID CurveID) (*ecdh.PrivateKey, error) { + curve, ok := curveForCurveID(curveID) + if !ok { + return nil, errors.New("tls: internal error: unsupported curve") + } + + return curve.GenerateKey(rand) +} + +func curveForCurveID(id CurveID) (ecdh.Curve, bool) { + switch id { + case X25519: + return ecdh.X25519(), true + case CurveP256: + return ecdh.P256(), true + case CurveP384: + return ecdh.P384(), true + case CurveP521: + return ecdh.P521(), true + default: + return nil, false + } +} + +func curveIDForCurve(curve ecdh.Curve) (CurveID, bool) { + switch curve { + case ecdh.X25519(): + return X25519, true + case ecdh.P256(): + return CurveP256, true + case ecdh.P384(): + return CurveP384, true + case ecdh.P521(): + return CurveP521, 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All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto" + "crypto/hmac" + "crypto/md5" + "crypto/sha1" + "crypto/sha256" + "crypto/sha512" + "errors" + "fmt" + "hash" + + "github.com/enetx/utls/internal/tls12" +) + +type prfFunc func(secret []byte, label string, seed []byte, keyLen int) []byte + +// Split a premaster secret in two as specified in RFC 4346, Section 5. +func splitPreMasterSecret(secret []byte) (s1, s2 []byte) { + s1 = secret[0 : (len(secret)+1)/2] + s2 = secret[len(secret)/2:] + return +} + +// pHash implements the P_hash function, as defined in RFC 4346, Section 5. +func pHash(result, secret, seed []byte, hash func() hash.Hash) { + h := hmac.New(hash, secret) + h.Write(seed) + a := h.Sum(nil) + + j := 0 + for j < len(result) { + h.Reset() + h.Write(a) + h.Write(seed) + b := h.Sum(nil) + copy(result[j:], b) + j += len(b) + + h.Reset() + h.Write(a) + a = h.Sum(nil) + } +} + +// prf10 implements the TLS 1.0 pseudo-random function, as defined in RFC 2246, Section 5. +func prf10(secret []byte, label string, seed []byte, keyLen int) []byte { + result := make([]byte, keyLen) + hashSHA1 := sha1.New + hashMD5 := md5.New + + labelAndSeed := make([]byte, len(label)+len(seed)) + copy(labelAndSeed, label) + copy(labelAndSeed[len(label):], seed) + + s1, s2 := splitPreMasterSecret(secret) + pHash(result, s1, labelAndSeed, hashMD5) + result2 := make([]byte, len(result)) + pHash(result2, s2, labelAndSeed, hashSHA1) + + for i, b := range result2 { + result[i] ^= b + } + + return result +} + +// prf12 implements the TLS 1.2 pseudo-random function, as defined in RFC 5246, Section 5. +func prf12(hashFunc func() hash.Hash) prfFunc { + return func(secret []byte, label string, seed []byte, keyLen int) []byte { + return tls12.PRF(hashFunc, secret, label, seed, keyLen) + } +} + +const ( + masterSecretLength = 48 // Length of a master secret in TLS 1.1. + finishedVerifyLength = 12 // Length of verify_data in a Finished message. +) + +const masterSecretLabel = "master secret" +const extendedMasterSecretLabel = "extended master secret" +const keyExpansionLabel = "key expansion" +const clientFinishedLabel = "client finished" +const serverFinishedLabel = "server finished" + +func prfAndHashForVersion(version uint16, suite *cipherSuite) (prfFunc, crypto.Hash) { + switch version { + case VersionTLS10, VersionTLS11: + return prf10, crypto.Hash(0) + case VersionTLS12: + if suite.flags&suiteSHA384 != 0 { + return prf12(sha512.New384), crypto.SHA384 + } + return prf12(sha256.New), crypto.SHA256 + default: + panic("unknown version") + } +} + +func prfForVersion(version uint16, suite *cipherSuite) prfFunc { + prf, _ := prfAndHashForVersion(version, suite) + return prf +} + +// masterFromPreMasterSecret generates the master secret from the pre-master +// secret. See RFC 5246, Section 8.1. +func masterFromPreMasterSecret(version uint16, suite *cipherSuite, preMasterSecret, clientRandom, serverRandom []byte) []byte { + seed := make([]byte, 0, len(clientRandom)+len(serverRandom)) + seed = append(seed, clientRandom...) + seed = append(seed, serverRandom...) + + return prfForVersion(version, suite)(preMasterSecret, masterSecretLabel, seed, masterSecretLength) +} + +// extMasterFromPreMasterSecret generates the extended master secret from the +// pre-master secret. See RFC 7627. +func extMasterFromPreMasterSecret(version uint16, suite *cipherSuite, preMasterSecret, transcript []byte) []byte { + prf, hash := prfAndHashForVersion(version, suite) + if version == VersionTLS12 { + // Use the FIPS 140-3 module only for TLS 1.2 with EMS, which is the + // only TLS 1.0-1.2 approved mode per IG D.Q. + return tls12.MasterSecret(hash.New, preMasterSecret, transcript) + } + return prf(preMasterSecret, extendedMasterSecretLabel, transcript, masterSecretLength) +} + +// keysFromMasterSecret generates the connection keys from the master +// secret, given the lengths of the MAC key, cipher key and IV, as defined in +// RFC 2246, Section 6.3. +func keysFromMasterSecret(version uint16, suite *cipherSuite, masterSecret, clientRandom, serverRandom []byte, macLen, keyLen, ivLen int) (clientMAC, serverMAC, clientKey, serverKey, clientIV, serverIV []byte) { + seed := make([]byte, 0, len(serverRandom)+len(clientRandom)) + seed = append(seed, serverRandom...) + seed = append(seed, clientRandom...) + + n := 2*macLen + 2*keyLen + 2*ivLen + keyMaterial := prfForVersion(version, suite)(masterSecret, keyExpansionLabel, seed, n) + clientMAC = keyMaterial[:macLen] + keyMaterial = keyMaterial[macLen:] + serverMAC = keyMaterial[:macLen] + keyMaterial = keyMaterial[macLen:] + clientKey = keyMaterial[:keyLen] + keyMaterial = keyMaterial[keyLen:] + serverKey = keyMaterial[:keyLen] + keyMaterial = keyMaterial[keyLen:] + clientIV = keyMaterial[:ivLen] + keyMaterial = keyMaterial[ivLen:] + serverIV = keyMaterial[:ivLen] + return +} + +func newFinishedHash(version uint16, cipherSuite *cipherSuite) finishedHash { + var buffer []byte + if version >= VersionTLS12 { + buffer = []byte{} + } + + prf, hash := prfAndHashForVersion(version, cipherSuite) + if hash != 0 { + return finishedHash{hash.New(), hash.New(), nil, nil, buffer, version, prf} + } + + return finishedHash{sha1.New(), sha1.New(), md5.New(), md5.New(), buffer, version, prf} +} + +// A finishedHash calculates the hash of a set of handshake messages suitable +// for including in a Finished message. +type finishedHash struct { + client hash.Hash + server hash.Hash + + // Prior to TLS 1.2, an additional MD5 hash is required. + clientMD5 hash.Hash + serverMD5 hash.Hash + + // In TLS 1.2, a full buffer is sadly required. + buffer []byte + + version uint16 + prf prfFunc +} + +func (h *finishedHash) Write(msg []byte) (n int, err error) { + h.client.Write(msg) + h.server.Write(msg) + + if h.version < VersionTLS12 { + h.clientMD5.Write(msg) + h.serverMD5.Write(msg) + } + + if h.buffer != nil { + h.buffer = append(h.buffer, msg...) + } + + return len(msg), nil +} + +func (h finishedHash) Sum() []byte { + if h.version >= VersionTLS12 { + return h.client.Sum(nil) + } + + out := make([]byte, 0, md5.Size+sha1.Size) + out = h.clientMD5.Sum(out) + return h.client.Sum(out) +} + +// clientSum returns the contents of the verify_data member of a client's +// Finished message. +func (h finishedHash) clientSum(masterSecret []byte) []byte { + return h.prf(masterSecret, clientFinishedLabel, h.Sum(), finishedVerifyLength) +} + +// serverSum returns the contents of the verify_data member of a server's +// Finished message. +func (h finishedHash) serverSum(masterSecret []byte) []byte { + return h.prf(masterSecret, serverFinishedLabel, h.Sum(), finishedVerifyLength) +} + +// hashForClientCertificate returns the handshake messages so far, pre-hashed if +// necessary, suitable for signing by a TLS client certificate. +func (h finishedHash) hashForClientCertificate(sigType uint8, hashAlg crypto.Hash) []byte { + if (h.version >= VersionTLS12 || sigType == signatureEd25519) && h.buffer == nil { + panic("tls: handshake hash for a client certificate requested after discarding the handshake buffer") + } + + if sigType == signatureEd25519 { + return h.buffer + } + + if h.version >= VersionTLS12 { + hash := hashAlg.New() + hash.Write(h.buffer) + return hash.Sum(nil) + } + + if sigType == signatureECDSA { + return h.server.Sum(nil) + } + + return h.Sum() +} + +// discardHandshakeBuffer is called when there is no more need to +// buffer the entirety of the handshake messages. +func (h *finishedHash) discardHandshakeBuffer() { + h.buffer = nil +} + +// noEKMBecauseRenegotiation is used as a value of +// ConnectionState.ekm when renegotiation is enabled and thus +// we wish to fail all key-material export requests. +func noEKMBecauseRenegotiation(label string, context []byte, length int) ([]byte, error) { + return nil, errors.New("crypto/tls: ExportKeyingMaterial is unavailable when renegotiation is enabled") +} + +// noEKMBecauseNoEMS is used as a value of ConnectionState.ekm when Extended +// Master Secret is not negotiated and thus we wish to fail all key-material +// export requests. +func noEKMBecauseNoEMS(label string, context []byte, length int) ([]byte, error) { + return nil, errors.New("crypto/tls: ExportKeyingMaterial is unavailable when neither TLS 1.3 nor Extended Master Secret are negotiated; override with GODEBUG=tlsunsafeekm=1") +} + +// ekmFromMasterSecret generates exported keying material as defined in RFC 5705. +func ekmFromMasterSecret(version uint16, suite *cipherSuite, masterSecret, clientRandom, serverRandom []byte) func(string, []byte, int) ([]byte, error) { + return func(label string, context []byte, length int) ([]byte, error) { + switch label { + case "client finished", "server finished", "master secret", "key expansion": + // These values are reserved and may not be used. + return nil, fmt.Errorf("crypto/tls: reserved ExportKeyingMaterial label: %s", label) + } + + seedLen := len(serverRandom) + len(clientRandom) + if context != nil { + seedLen += 2 + len(context) + } + seed := make([]byte, 0, seedLen) + + seed = append(seed, clientRandom...) + seed = append(seed, serverRandom...) + + if context != nil { + if len(context) >= 1<<16 { + return nil, fmt.Errorf("crypto/tls: ExportKeyingMaterial context too long") + } + seed = append(seed, byte(len(context)>>8), byte(len(context))) + seed = append(seed, context...) + } + + return prfForVersion(version, suite)(masterSecret, label, seed, length), nil + } +} diff --git a/backend/vendor/github.com/enetx/utls/quic.go b/backend/vendor/github.com/enetx/utls/quic.go new file mode 100644 index 0000000..ba8a235 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/quic.go @@ -0,0 +1,500 @@ +// Copyright 2023 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "context" + "errors" + "fmt" +) + +// QUICEncryptionLevel represents a QUIC encryption level used to transmit +// handshake messages. +type QUICEncryptionLevel int + +const ( + QUICEncryptionLevelInitial = QUICEncryptionLevel(iota) + QUICEncryptionLevelEarly + QUICEncryptionLevelHandshake + QUICEncryptionLevelApplication +) + +func (l QUICEncryptionLevel) String() string { + switch l { + case QUICEncryptionLevelInitial: + return "Initial" + case QUICEncryptionLevelEarly: + return "Early" + case QUICEncryptionLevelHandshake: + return "Handshake" + case QUICEncryptionLevelApplication: + return "Application" + default: + return fmt.Sprintf("QUICEncryptionLevel(%v)", int(l)) + } +} + +// A QUICConn represents a connection which uses a QUIC implementation as the underlying +// transport as described in RFC 9001. +// +// Methods of QUICConn are not safe for concurrent use. +type QUICConn struct { + conn *Conn + + sessionTicketSent bool +} + +// A QUICConfig configures a [QUICConn]. +type QUICConfig struct { + TLSConfig *Config + + // EnableSessionEvents may be set to true to enable the + // [QUICStoreSession] and [QUICResumeSession] events for client connections. + // When this event is enabled, sessions are not automatically + // stored in the client session cache. + // The application should use [QUICConn.StoreSession] to store sessions. + EnableSessionEvents bool +} + +// A QUICEventKind is a type of operation on a QUIC connection. +type QUICEventKind int + +const ( + // QUICNoEvent indicates that there are no events available. + QUICNoEvent QUICEventKind = iota + + // QUICSetReadSecret and QUICSetWriteSecret provide the read and write + // secrets for a given encryption level. + // QUICEvent.Level, QUICEvent.Data, and QUICEvent.Suite are set. + // + // Secrets for the Initial encryption level are derived from the initial + // destination connection ID, and are not provided by the QUICConn. + QUICSetReadSecret + QUICSetWriteSecret + + // QUICWriteData provides data to send to the peer in CRYPTO frames. + // QUICEvent.Data is set. + QUICWriteData + + // QUICTransportParameters provides the peer's QUIC transport parameters. + // QUICEvent.Data is set. + QUICTransportParameters + + // QUICTransportParametersRequired indicates that the caller must provide + // QUIC transport parameters to send to the peer. The caller should set + // the transport parameters with QUICConn.SetTransportParameters and call + // QUICConn.NextEvent again. + // + // If transport parameters are set before calling QUICConn.Start, the + // connection will never generate a QUICTransportParametersRequired event. + QUICTransportParametersRequired + + // QUICRejectedEarlyData indicates that the server rejected 0-RTT data even + // if we offered it. It's returned before QUICEncryptionLevelApplication + // keys are returned. + // This event only occurs on client connections. + QUICRejectedEarlyData + + // QUICHandshakeDone indicates that the TLS handshake has completed. + QUICHandshakeDone + + // QUICResumeSession indicates that a client is attempting to resume a previous session. + // [QUICEvent.SessionState] is set. + // + // For client connections, this event occurs when the session ticket is selected. + // For server connections, this event occurs when receiving the client's session ticket. + // + // The application may set [QUICEvent.SessionState.EarlyData] to false before the + // next call to [QUICConn.NextEvent] to decline 0-RTT even if the session supports it. + QUICResumeSession + + // QUICStoreSession indicates that the server has provided state permitting + // the client to resume the session. + // [QUICEvent.SessionState] is set. + // The application should use [QUICConn.StoreSession] session to store the [SessionState]. + // The application may modify the [SessionState] before storing it. + // This event only occurs on client connections. + QUICStoreSession +) + +// A QUICEvent is an event occurring on a QUIC connection. +// +// The type of event is specified by the Kind field. +// The contents of the other fields are kind-specific. +type QUICEvent struct { + Kind QUICEventKind + + // Set for QUICSetReadSecret, QUICSetWriteSecret, and QUICWriteData. + Level QUICEncryptionLevel + + // Set for QUICTransportParameters, QUICSetReadSecret, QUICSetWriteSecret, and QUICWriteData. + // The contents are owned by crypto/tls, and are valid until the next NextEvent call. + Data []byte + + // Set for QUICSetReadSecret and QUICSetWriteSecret. + Suite uint16 + + // Set for QUICResumeSession and QUICStoreSession. + SessionState *SessionState +} + +type quicState struct { + events []QUICEvent + nextEvent int + + // eventArr is a statically allocated event array, large enough to handle + // the usual maximum number of events resulting from a single call: transport + // parameters, Initial data, Early read secret, Handshake write and read + // secrets, Handshake data, Application write secret, Application data. + eventArr [8]QUICEvent + + started bool + signalc chan struct{} // handshake data is available to be read + blockedc chan struct{} // handshake is waiting for data, closed when done + cancelc <-chan struct{} // handshake has been canceled + cancel context.CancelFunc + + waitingForDrain bool + + // readbuf is shared between HandleData and the handshake goroutine. + // HandshakeCryptoData passes ownership to the handshake goroutine by + // reading from signalc, and reclaims ownership by reading from blockedc. + readbuf []byte + + transportParams []byte // to send to the peer + + enableSessionEvents bool +} + +// QUICClient returns a new TLS client side connection using QUICTransport as the +// underlying transport. The config cannot be nil. +// +// The config's MinVersion must be at least TLS 1.3. +func QUICClient(config *QUICConfig) *QUICConn { + return newQUICConn(Client(nil, config.TLSConfig), config) +} + +// QUICServer returns a new TLS server side connection using QUICTransport as the +// underlying transport. The config cannot be nil. +// +// The config's MinVersion must be at least TLS 1.3. +func QUICServer(config *QUICConfig) *QUICConn { + return newQUICConn(Server(nil, config.TLSConfig), config) +} + +func newQUICConn(conn *Conn, config *QUICConfig) *QUICConn { + conn.quic = &quicState{ + signalc: make(chan struct{}), + blockedc: make(chan struct{}), + enableSessionEvents: config.EnableSessionEvents, + } + conn.quic.events = conn.quic.eventArr[:0] + return &QUICConn{ + conn: conn, + } +} + +// Start starts the client or server handshake protocol. +// It may produce connection events, which may be read with [QUICConn.NextEvent]. +// +// Start must be called at most once. +func (q *QUICConn) Start(ctx context.Context) error { + if q.conn.quic.started { + return quicError(errors.New("tls: Start called more than once")) + } + q.conn.quic.started = true + if q.conn.config.MinVersion < VersionTLS13 { + return quicError(errors.New("tls: Config MinVersion must be at least TLS 1.3")) + } + go q.conn.HandshakeContext(ctx) + if _, ok := <-q.conn.quic.blockedc; !ok { + return q.conn.handshakeErr + } + return nil +} + +// NextEvent returns the next event occurring on the connection. +// It returns an event with a Kind of [QUICNoEvent] when no events are available. +func (q *QUICConn) NextEvent() QUICEvent { + qs := q.conn.quic + if last := qs.nextEvent - 1; last >= 0 && len(qs.events[last].Data) > 0 { + // Write over some of the previous event's data, + // to catch callers erroniously retaining it. + qs.events[last].Data[0] = 0 + } + if qs.nextEvent >= len(qs.events) && qs.waitingForDrain { + qs.waitingForDrain = false + <-qs.signalc + <-qs.blockedc + } + if qs.nextEvent >= len(qs.events) { + qs.events = qs.events[:0] + qs.nextEvent = 0 + return QUICEvent{Kind: QUICNoEvent} + } + e := qs.events[qs.nextEvent] + qs.events[qs.nextEvent] = QUICEvent{} // zero out references to data + qs.nextEvent++ + return e +} + +// Close closes the connection and stops any in-progress handshake. +func (q *QUICConn) Close() error { + if q.conn.quic.cancel == nil { + return nil // never started + } + q.conn.quic.cancel() + for range q.conn.quic.blockedc { + // Wait for the handshake goroutine to return. + } + return q.conn.handshakeErr +} + +// HandleData handles handshake bytes received from the peer. +// It may produce connection events, which may be read with [QUICConn.NextEvent]. +func (q *QUICConn) HandleData(level QUICEncryptionLevel, data []byte) error { + c := q.conn + if c.in.level != level { + return quicError(c.in.setErrorLocked(errors.New("tls: handshake data received at wrong level"))) + } + c.quic.readbuf = data + <-c.quic.signalc + _, ok := <-c.quic.blockedc + if ok { + // The handshake goroutine is waiting for more data. + return nil + } + // The handshake goroutine has exited. + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + c.hand.Write(c.quic.readbuf) + c.quic.readbuf = nil + for q.conn.hand.Len() >= 4 && q.conn.handshakeErr == nil { + b := q.conn.hand.Bytes() + n := int(b[1])<<16 | int(b[2])<<8 | int(b[3]) + if n > maxHandshake { + q.conn.handshakeErr = fmt.Errorf("tls: handshake message of length %d bytes exceeds maximum of %d bytes", n, maxHandshake) + break + } + if len(b) < 4+n { + return nil + } + if err := q.conn.handlePostHandshakeMessage(); err != nil { + q.conn.handshakeErr = err + } + } + if q.conn.handshakeErr != nil { + return quicError(q.conn.handshakeErr) + } + return nil +} + +type QUICSessionTicketOptions struct { + // EarlyData specifies whether the ticket may be used for 0-RTT. + EarlyData bool + Extra [][]byte +} + +// SendSessionTicket sends a session ticket to the client. +// It produces connection events, which may be read with [QUICConn.NextEvent]. +// Currently, it can only be called once. +func (q *QUICConn) SendSessionTicket(opts QUICSessionTicketOptions) error { + c := q.conn + if !c.isHandshakeComplete.Load() { + return quicError(errors.New("tls: SendSessionTicket called before handshake completed")) + } + if c.isClient { + return quicError(errors.New("tls: SendSessionTicket called on the client")) + } + if q.sessionTicketSent { + return quicError(errors.New("tls: SendSessionTicket called multiple times")) + } + q.sessionTicketSent = true + return quicError(c.sendSessionTicket(opts.EarlyData, opts.Extra)) +} + +// StoreSession stores a session previously received in a QUICStoreSession event +// in the ClientSessionCache. +// The application may process additional events or modify the SessionState +// before storing the session. +func (q *QUICConn) StoreSession(session *SessionState) error { + c := q.conn + if !c.isClient { + return quicError(errors.New("tls: StoreSessionTicket called on the server")) + } + cacheKey := c.clientSessionCacheKey() + if cacheKey == "" { + return nil + } + cs := &ClientSessionState{session: session} + c.config.ClientSessionCache.Put(cacheKey, cs) + return nil +} + +// ConnectionState returns basic TLS details about the connection. +func (q *QUICConn) ConnectionState() ConnectionState { + return q.conn.ConnectionState() +} + +// SetTransportParameters sets the transport parameters to send to the peer. +// +// Server connections may delay setting the transport parameters until after +// receiving the client's transport parameters. See [QUICTransportParametersRequired]. +func (q *QUICConn) SetTransportParameters(params []byte) { + if params == nil { + params = []byte{} + } + q.conn.quic.transportParams = params + if q.conn.quic.started { + <-q.conn.quic.signalc + <-q.conn.quic.blockedc + } +} + +// quicError ensures err is an AlertError. +// If err is not already, quicError wraps it with alertInternalError. +func quicError(err error) error { + if err == nil { + return nil + } + var ae AlertError + if errors.As(err, &ae) { + return err + } + var a alert + if !errors.As(err, &a) { + a = alertInternalError + } + // Return an error wrapping the original error and an AlertError. + // Truncate the text of the alert to 0 characters. + return fmt.Errorf("%w%.0w", err, AlertError(a)) +} + +func (c *Conn) quicReadHandshakeBytes(n int) error { + for c.hand.Len() < n { + if err := c.quicWaitForSignal(); err != nil { + return err + } + } + return nil +} + +func (c *Conn) quicSetReadSecret(level QUICEncryptionLevel, suite uint16, secret []byte) { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICSetReadSecret, + Level: level, + Suite: suite, + Data: secret, + }) +} + +func (c *Conn) quicSetWriteSecret(level QUICEncryptionLevel, suite uint16, secret []byte) { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICSetWriteSecret, + Level: level, + Suite: suite, + Data: secret, + }) +} + +func (c *Conn) quicWriteCryptoData(level QUICEncryptionLevel, data []byte) { + var last *QUICEvent + if len(c.quic.events) > 0 { + last = &c.quic.events[len(c.quic.events)-1] + } + if last == nil || last.Kind != QUICWriteData || last.Level != level { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICWriteData, + Level: level, + }) + last = &c.quic.events[len(c.quic.events)-1] + } + last.Data = append(last.Data, data...) +} + +func (c *Conn) quicResumeSession(session *SessionState) error { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICResumeSession, + SessionState: session, + }) + c.quic.waitingForDrain = true + for c.quic.waitingForDrain { + if err := c.quicWaitForSignal(); err != nil { + return err + } + } + return nil +} + +func (c *Conn) quicStoreSession(session *SessionState) { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICStoreSession, + SessionState: session, + }) +} + +func (c *Conn) quicSetTransportParameters(params []byte) { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICTransportParameters, + Data: params, + }) +} + +func (c *Conn) quicGetTransportParameters() ([]byte, error) { + if c.quic.transportParams == nil { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICTransportParametersRequired, + }) + } + for c.quic.transportParams == nil { + if err := c.quicWaitForSignal(); err != nil { + return nil, err + } + } + return c.quic.transportParams, nil +} + +func (c *Conn) quicHandshakeComplete() { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICHandshakeDone, + }) +} + +func (c *Conn) quicRejectedEarlyData() { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICRejectedEarlyData, + }) +} + +// quicWaitForSignal notifies the QUICConn that handshake progress is blocked, +// and waits for a signal that the handshake should proceed. +// +// The handshake may become blocked waiting for handshake bytes +// or for the user to provide transport parameters. +func (c *Conn) quicWaitForSignal() error { + // Drop the handshake mutex while blocked to allow the user + // to call ConnectionState before the handshake completes. + c.handshakeMutex.Unlock() + defer c.handshakeMutex.Lock() + // Send on blockedc to notify the QUICConn that the handshake is blocked. + // Exported methods of QUICConn wait for the handshake to become blocked + // before returning to the user. + select { + case c.quic.blockedc <- struct{}{}: + case <-c.quic.cancelc: + return c.sendAlertLocked(alertCloseNotify) + } + // The QUICConn reads from signalc to notify us that the handshake may + // be able to proceed. (The QUICConn reads, because we close signalc to + // indicate that the handshake has completed.) + select { + case c.quic.signalc <- struct{}{}: + c.hand.Write(c.quic.readbuf) + c.quic.readbuf = nil + case <-c.quic.cancelc: + return c.sendAlertLocked(alertCloseNotify) + } + return nil +} diff --git a/backend/vendor/github.com/enetx/utls/ticket.go b/backend/vendor/github.com/enetx/utls/ticket.go new file mode 100644 index 0000000..4bd263e --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/ticket.go @@ -0,0 +1,441 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto/aes" + "crypto/cipher" + "crypto/hmac" + "crypto/sha256" + "crypto/subtle" + "crypto/x509" + "errors" + "io" + + "golang.org/x/crypto/cryptobyte" +) + +// A SessionState is a resumable session. +type SessionState struct { + // Encoded as a SessionState (in the language of RFC 8446, Section 3). + // + // enum { server(1), client(2) } SessionStateType; + // + // opaque Certificate<1..2^24-1>; + // + // Certificate CertificateChain<0..2^24-1>; + // + // opaque Extra<0..2^24-1>; + // + // struct { + // uint16 version; + // SessionStateType type; + // uint16 cipher_suite; + // uint64 created_at; + // opaque secret<1..2^8-1>; + // Extra extra<0..2^24-1>; + // uint8 ext_master_secret = { 0, 1 }; + // uint8 early_data = { 0, 1 }; + // CertificateEntry certificate_list<0..2^24-1>; + // CertificateChain verified_chains<0..2^24-1>; /* excluding leaf */ + // select (SessionState.early_data) { + // case 0: Empty; + // case 1: opaque alpn<1..2^8-1>; + // }; + // select (SessionState.type) { + // case server: Empty; + // case client: struct { + // select (SessionState.version) { + // case VersionTLS10..VersionTLS12: Empty; + // case VersionTLS13: struct { + // uint64 use_by; + // uint32 age_add; + // }; + // }; + // }; + // }; + // } SessionState; + // + + // Extra is ignored by crypto/tls, but is encoded by [SessionState.Bytes] + // and parsed by [ParseSessionState]. + // + // This allows [Config.UnwrapSession]/[Config.WrapSession] and + // [ClientSessionCache] implementations to store and retrieve additional + // data alongside this session. + // + // To allow different layers in a protocol stack to share this field, + // applications must only append to it, not replace it, and must use entries + // that can be recognized even if out of order (for example, by starting + // with an id and version prefix). + Extra [][]byte + + // EarlyData indicates whether the ticket can be used for 0-RTT in a QUIC + // connection. The application may set this to false if it is true to + // decline to offer 0-RTT even if supported. + EarlyData bool + + version uint16 + isClient bool + cipherSuite uint16 + // createdAt is the generation time of the secret on the sever (which for + // TLS 1.0–1.2 might be earlier than the current session) and the time at + // which the ticket was received on the client. + createdAt uint64 // seconds since UNIX epoch + secret []byte // master secret for TLS 1.2, or the PSK for TLS 1.3 + extMasterSecret bool + peerCertificates []*x509.Certificate + activeCertHandles []*activeCert + ocspResponse []byte + scts [][]byte + verifiedChains [][]*x509.Certificate + alpnProtocol string // only set if EarlyData is true + + // Client-side TLS 1.3-only fields. + useBy uint64 // seconds since UNIX epoch + ageAdd uint32 + ticket []byte +} + +// Bytes encodes the session, including any private fields, so that it can be +// parsed by [ParseSessionState]. The encoding contains secret values critical +// to the security of future and possibly past sessions. +// +// The specific encoding should be considered opaque and may change incompatibly +// between Go versions. +func (s *SessionState) Bytes() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint16(s.version) + if s.isClient { + b.AddUint8(2) // client + } else { + b.AddUint8(1) // server + } + b.AddUint16(s.cipherSuite) + addUint64(&b, s.createdAt) + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(s.secret) + }) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + for _, extra := range s.Extra { + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(extra) + }) + } + }) + if s.extMasterSecret { + b.AddUint8(1) + } else { + b.AddUint8(0) + } + if s.EarlyData { + b.AddUint8(1) + } else { + b.AddUint8(0) + } + marshalCertificate(&b, Certificate{ + Certificate: certificatesToBytesSlice(s.peerCertificates), + OCSPStaple: s.ocspResponse, + SignedCertificateTimestamps: s.scts, + }) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + for _, chain := range s.verifiedChains { + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + // We elide the first certificate because it's always the leaf. + if len(chain) == 0 { + b.SetError(errors.New("tls: internal error: empty verified chain")) + return + } + for _, cert := range chain[1:] { + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(cert.Raw) + }) + } + }) + } + }) + if s.EarlyData { + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes([]byte(s.alpnProtocol)) + }) + } + if s.isClient { + if s.version >= VersionTLS13 { + addUint64(&b, s.useBy) + b.AddUint32(s.ageAdd) + } + } + return b.Bytes() +} + +func certificatesToBytesSlice(certs []*x509.Certificate) [][]byte { + s := make([][]byte, 0, len(certs)) + for _, c := range certs { + s = append(s, c.Raw) + } + return s +} + +// ParseSessionState parses a [SessionState] encoded by [SessionState.Bytes]. +func ParseSessionState(data []byte) (*SessionState, error) { + ss := &SessionState{} + s := cryptobyte.String(data) + var typ, extMasterSecret, earlyData uint8 + var cert Certificate + var extra cryptobyte.String + if !s.ReadUint16(&ss.version) || + !s.ReadUint8(&typ) || + (typ != 1 && typ != 2) || + !s.ReadUint16(&ss.cipherSuite) || + !readUint64(&s, &ss.createdAt) || + !readUint8LengthPrefixed(&s, &ss.secret) || + !s.ReadUint24LengthPrefixed(&extra) || + !s.ReadUint8(&extMasterSecret) || + !s.ReadUint8(&earlyData) || + len(ss.secret) == 0 || + !unmarshalCertificate(&s, &cert) { + return nil, errors.New("tls: invalid session encoding") + } + for !extra.Empty() { + var e []byte + if !readUint24LengthPrefixed(&extra, &e) { + return nil, errors.New("tls: invalid session encoding") + } + ss.Extra = append(ss.Extra, e) + } + switch extMasterSecret { + case 0: + ss.extMasterSecret = false + case 1: + ss.extMasterSecret = true + default: + return nil, errors.New("tls: invalid session encoding") + } + switch earlyData { + case 0: + ss.EarlyData = false + case 1: + ss.EarlyData = true + default: + return nil, errors.New("tls: invalid session encoding") + } + for _, cert := range cert.Certificate { + c, err := globalCertCache.newCert(cert) + if err != nil { + return nil, err + } + ss.activeCertHandles = append(ss.activeCertHandles, c) + ss.peerCertificates = append(ss.peerCertificates, c.cert) + } + ss.ocspResponse = cert.OCSPStaple + ss.scts = cert.SignedCertificateTimestamps + var chainList cryptobyte.String + if !s.ReadUint24LengthPrefixed(&chainList) { + return nil, errors.New("tls: invalid session encoding") + } + for !chainList.Empty() { + var certList cryptobyte.String + if !chainList.ReadUint24LengthPrefixed(&certList) { + return nil, errors.New("tls: invalid session encoding") + } + var chain []*x509.Certificate + if len(ss.peerCertificates) == 0 { + return nil, errors.New("tls: invalid session encoding") + } + chain = append(chain, ss.peerCertificates[0]) + for !certList.Empty() { + var cert []byte + if !readUint24LengthPrefixed(&certList, &cert) { + return nil, errors.New("tls: invalid session encoding") + } + c, err := globalCertCache.newCert(cert) + if err != nil { + return nil, err + } + ss.activeCertHandles = append(ss.activeCertHandles, c) + chain = append(chain, c.cert) + } + ss.verifiedChains = append(ss.verifiedChains, chain) + } + if ss.EarlyData { + var alpn []byte + if !readUint8LengthPrefixed(&s, &alpn) { + return nil, errors.New("tls: invalid session encoding") + } + ss.alpnProtocol = string(alpn) + } + if isClient := typ == 2; !isClient { + if !s.Empty() { + return nil, errors.New("tls: invalid session encoding") + } + return ss, nil + } + ss.isClient = true + if len(ss.peerCertificates) == 0 { + return nil, errors.New("tls: no server certificates in client session") + } + if ss.version < VersionTLS13 { + if !s.Empty() { + return nil, errors.New("tls: invalid session encoding") + } + return ss, nil + } + if !s.ReadUint64(&ss.useBy) || !s.ReadUint32(&ss.ageAdd) || !s.Empty() { + return nil, errors.New("tls: invalid session encoding") + } + return ss, nil +} + +// sessionState returns a partially filled-out [SessionState] with information +// from the current connection. +func (c *Conn) sessionState() *SessionState { + return &SessionState{ + version: c.vers, + cipherSuite: c.cipherSuite, + createdAt: uint64(c.config.time().Unix()), + alpnProtocol: c.clientProtocol, + peerCertificates: c.peerCertificates, + activeCertHandles: c.activeCertHandles, + ocspResponse: c.ocspResponse, + scts: c.scts, + isClient: c.isClient, + extMasterSecret: c.extMasterSecret, + verifiedChains: c.verifiedChains, + } +} + +// EncryptTicket encrypts a ticket with the [Config]'s configured (or default) +// session ticket keys. It can be used as a [Config.WrapSession] implementation. +func (c *Config) EncryptTicket(cs ConnectionState, ss *SessionState) ([]byte, error) { + ticketKeys := c.ticketKeys(nil) + stateBytes, err := ss.Bytes() + if err != nil { + return nil, err + } + return c.encryptTicket(stateBytes, ticketKeys) +} + +func (c *Config) encryptTicket(state []byte, ticketKeys []ticketKey) ([]byte, error) { + if len(ticketKeys) == 0 { + return nil, errors.New("tls: internal error: session ticket keys unavailable") + } + + encrypted := make([]byte, aes.BlockSize+len(state)+sha256.Size) + iv := encrypted[:aes.BlockSize] + ciphertext := encrypted[aes.BlockSize : len(encrypted)-sha256.Size] + authenticated := encrypted[:len(encrypted)-sha256.Size] + macBytes := encrypted[len(encrypted)-sha256.Size:] + + if _, err := io.ReadFull(c.rand(), iv); err != nil { + return nil, err + } + key := ticketKeys[0] + block, err := aes.NewCipher(key.aesKey[:]) + if err != nil { + return nil, errors.New("tls: failed to create cipher while encrypting ticket: " + err.Error()) + } + cipher.NewCTR(block, iv).XORKeyStream(ciphertext, state) + + mac := hmac.New(sha256.New, key.hmacKey[:]) + mac.Write(authenticated) + mac.Sum(macBytes[:0]) + + return encrypted, nil +} + +// DecryptTicket decrypts a ticket encrypted by [Config.EncryptTicket]. It can +// be used as a [Config.UnwrapSession] implementation. +// +// If the ticket can't be decrypted or parsed, DecryptTicket returns (nil, nil). +func (c *Config) DecryptTicket(identity []byte, cs ConnectionState) (*SessionState, error) { + ticketKeys := c.ticketKeys(nil) + stateBytes := c.decryptTicket(identity, ticketKeys) + if stateBytes == nil { + return nil, nil + } + s, err := ParseSessionState(stateBytes) + if err != nil { + return nil, nil // drop unparsable tickets on the floor + } + return s, nil +} + +func (c *Config) decryptTicket(encrypted []byte, ticketKeys []ticketKey) []byte { + if len(encrypted) < aes.BlockSize+sha256.Size { + return nil + } + + iv := encrypted[:aes.BlockSize] + ciphertext := encrypted[aes.BlockSize : len(encrypted)-sha256.Size] + authenticated := encrypted[:len(encrypted)-sha256.Size] + macBytes := encrypted[len(encrypted)-sha256.Size:] + + for _, key := range ticketKeys { + mac := hmac.New(sha256.New, key.hmacKey[:]) + mac.Write(authenticated) + expected := mac.Sum(nil) + + if subtle.ConstantTimeCompare(macBytes, expected) != 1 { + continue + } + + block, err := aes.NewCipher(key.aesKey[:]) + if err != nil { + return nil + } + plaintext := make([]byte, len(ciphertext)) + cipher.NewCTR(block, iv).XORKeyStream(plaintext, ciphertext) + + return plaintext + } + + return nil +} + +// ClientSessionState contains the state needed by a client to +// resume a previous TLS session. +type ClientSessionState struct { + session *SessionState +} + +// ResumptionState returns the session ticket sent by the server (also known as +// the session's identity) and the state necessary to resume this session. +// +// It can be called by [ClientSessionCache.Put] to serialize (with +// [SessionState.Bytes]) and store the session. +func (cs *ClientSessionState) ResumptionState() (ticket []byte, state *SessionState, err error) { + if cs == nil || cs.session == nil { + return nil, nil, nil + } + return cs.session.ticket, cs.session, nil +} + +// NewResumptionState returns a state value that can be returned by +// [ClientSessionCache.Get] to resume a previous session. +// +// state needs to be returned by [ParseSessionState], and the ticket and session +// state must have been returned by [ClientSessionState.ResumptionState]. +func NewResumptionState(ticket []byte, state *SessionState) (*ClientSessionState, error) { + state.ticket = ticket + return &ClientSessionState{ + session: state, + }, nil +} + +// // DecryptTicketWith decrypts an encrypted session ticket +// // using a TicketKeys (ie []TicketKey) struct +// // +// // usedOldKey will be true if the key used for decryption is +// // not the first in the []TicketKey slice +// // +// // [uTLS] changed to be made public and take a TicketKeys and use a fake conn receiver +// func DecryptTicketWith(encrypted []byte, tks TicketKeys) (plaintext []byte, usedOldKey bool) { +// // create fake conn +// c := &Conn{ +// ticketKeys: tks.ToPrivate(), +// } + +// return c.decryptTicket(encrypted) +// } diff --git a/backend/vendor/github.com/enetx/utls/tls.go b/backend/vendor/github.com/enetx/utls/tls.go new file mode 100644 index 0000000..d76e000 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/tls.go @@ -0,0 +1,373 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package tls partially implements TLS 1.2, as specified in RFC 5246, +// and TLS 1.3, as specified in RFC 8446. +package tls + +// BUG(agl): The crypto/tls package only implements some countermeasures +// against Lucky13 attacks on CBC-mode encryption, and only on SHA1 +// variants. See http://www.isg.rhul.ac.uk/tls/TLStiming.pdf and +// https://www.imperialviolet.org/2013/02/04/luckythirteen.html. + +import ( + "bytes" + "context" + "crypto" + "crypto/ecdsa" + "crypto/ed25519" + "crypto/rsa" + "crypto/x509" + "encoding/pem" + "errors" + "fmt" + "net" + "os" + "strings" +) + +// Server returns a new TLS server side connection +// using conn as the underlying transport. +// The configuration config must be non-nil and must include +// at least one certificate or else set GetCertificate. +func Server(conn net.Conn, config *Config) *Conn { + c := &Conn{ + conn: conn, + config: config, + } + c.handshakeFn = c.serverHandshake + return c +} + +// Client returns a new TLS client side connection +// using conn as the underlying transport. +// The config cannot be nil: users must set either ServerName or +// InsecureSkipVerify in the config. +func Client(conn net.Conn, config *Config) *Conn { + c := &Conn{ + conn: conn, + config: config, + isClient: true, + } + c.handshakeFn = c.clientHandshake + return c +} + +// A listener implements a network listener (net.Listener) for TLS connections. +type listener struct { + net.Listener + config *Config +} + +// Accept waits for and returns the next incoming TLS connection. +// The returned connection is of type *Conn. +func (l *listener) Accept() (net.Conn, error) { + c, err := l.Listener.Accept() + if err != nil { + return nil, err + } + return Server(c, l.config), nil +} + +// NewListener creates a Listener which accepts connections from an inner +// Listener and wraps each connection with [Server]. +// The configuration config must be non-nil and must include +// at least one certificate or else set GetCertificate. +func NewListener(inner net.Listener, config *Config) net.Listener { + l := new(listener) + l.Listener = inner + l.config = config + return l +} + +// Listen creates a TLS listener accepting connections on the +// given network address using net.Listen. +// The configuration config must be non-nil and must include +// at least one certificate or else set GetCertificate. +func Listen(network, laddr string, config *Config) (net.Listener, error) { + // If this condition changes, consider updating http.Server.ServeTLS too. + if config == nil || len(config.Certificates) == 0 && + config.GetCertificate == nil && config.GetConfigForClient == nil { + return nil, errors.New("tls: neither Certificates, GetCertificate, nor GetConfigForClient set in Config") + } + l, err := net.Listen(network, laddr) + if err != nil { + return nil, err + } + return NewListener(l, config), nil +} + +type timeoutError struct{} + +func (timeoutError) Error() string { return "tls: DialWithDialer timed out" } +func (timeoutError) Timeout() bool { return true } +func (timeoutError) Temporary() bool { return true } + +// DialWithDialer connects to the given network address using dialer.Dial and +// then initiates a TLS handshake, returning the resulting TLS connection. Any +// timeout or deadline given in the dialer apply to connection and TLS +// handshake as a whole. +// +// DialWithDialer interprets a nil configuration as equivalent to the zero +// configuration; see the documentation of [Config] for the defaults. +// +// DialWithDialer uses context.Background internally; to specify the context, +// use [Dialer.DialContext] with NetDialer set to the desired dialer. +func DialWithDialer(dialer *net.Dialer, network, addr string, config *Config) (*Conn, error) { + return dial(context.Background(), dialer, network, addr, config) +} + +func dial(ctx context.Context, netDialer *net.Dialer, network, addr string, config *Config) (*Conn, error) { + if netDialer.Timeout != 0 { + var cancel context.CancelFunc + ctx, cancel = context.WithTimeout(ctx, netDialer.Timeout) + defer cancel() + } + + if !netDialer.Deadline.IsZero() { + var cancel context.CancelFunc + ctx, cancel = context.WithDeadline(ctx, netDialer.Deadline) + defer cancel() + } + + rawConn, err := netDialer.DialContext(ctx, network, addr) + if err != nil { + return nil, err + } + + colonPos := strings.LastIndex(addr, ":") + if colonPos == -1 { + colonPos = len(addr) + } + hostname := addr[:colonPos] + + if config == nil { + config = defaultConfig() + } + // If no ServerName is set, infer the ServerName + // from the hostname we're connecting to. + if config.ServerName == "" { + // Make a copy to avoid polluting argument or default. + c := config.Clone() + c.ServerName = hostname + config = c + } + + conn := Client(rawConn, config) + if err := conn.HandshakeContext(ctx); err != nil { + rawConn.Close() + return nil, err + } + return conn, nil +} + +// Dial connects to the given network address using net.Dial +// and then initiates a TLS handshake, returning the resulting +// TLS connection. +// Dial interprets a nil configuration as equivalent to +// the zero configuration; see the documentation of Config +// for the defaults. +func Dial(network, addr string, config *Config) (*Conn, error) { + return DialWithDialer(new(net.Dialer), network, addr, config) +} + +// Dialer dials TLS connections given a configuration and a Dialer for the +// underlying connection. +type Dialer struct { + // NetDialer is the optional dialer to use for the TLS connections' + // underlying TCP connections. + // A nil NetDialer is equivalent to the net.Dialer zero value. + NetDialer *net.Dialer + + // Config is the TLS configuration to use for new connections. + // A nil configuration is equivalent to the zero + // configuration; see the documentation of Config for the + // defaults. + Config *Config +} + +// Dial connects to the given network address and initiates a TLS +// handshake, returning the resulting TLS connection. +// +// The returned [Conn], if any, will always be of type *[Conn]. +// +// Dial uses context.Background internally; to specify the context, +// use [Dialer.DialContext]. +func (d *Dialer) Dial(network, addr string) (net.Conn, error) { + return d.DialContext(context.Background(), network, addr) +} + +func (d *Dialer) netDialer() *net.Dialer { + if d.NetDialer != nil { + return d.NetDialer + } + return new(net.Dialer) +} + +// DialContext connects to the given network address and initiates a TLS +// handshake, returning the resulting TLS connection. +// +// The provided Context must be non-nil. If the context expires before +// the connection is complete, an error is returned. Once successfully +// connected, any expiration of the context will not affect the +// connection. +// +// The returned [Conn], if any, will always be of type *[Conn]. +func (d *Dialer) DialContext(ctx context.Context, network, addr string) (net.Conn, error) { + c, err := dial(ctx, d.netDialer(), network, addr, d.Config) + if err != nil { + // Don't return c (a typed nil) in an interface. + return nil, err + } + return c, nil +} + +// LoadX509KeyPair reads and parses a public/private key pair from a pair of +// files. The files must contain PEM encoded data. The certificate file may +// contain intermediate certificates following the leaf certificate to form a +// certificate chain. On successful return, Certificate.Leaf will be populated. +// +// Before Go 1.23 Certificate.Leaf was left nil, and the parsed certificate was +// discarded. This behavior can be re-enabled by setting "x509keypairleaf=0" +// in the GODEBUG environment variable. +func LoadX509KeyPair(certFile, keyFile string) (Certificate, error) { + certPEMBlock, err := os.ReadFile(certFile) + if err != nil { + return Certificate{}, err + } + keyPEMBlock, err := os.ReadFile(keyFile) + if err != nil { + return Certificate{}, err + } + return X509KeyPair(certPEMBlock, keyPEMBlock) +} + +// var x509keypairleaf = godebug.New("x509keypairleaf") [uTLS] + +// X509KeyPair parses a public/private key pair from a pair of +// PEM encoded data. On successful return, Certificate.Leaf will be populated. +// +// Before Go 1.23 Certificate.Leaf was left nil, and the parsed certificate was +// discarded. This behavior can be re-enabled by setting "x509keypairleaf=0" +// in the GODEBUG environment variable. +func X509KeyPair(certPEMBlock, keyPEMBlock []byte) (Certificate, error) { + fail := func(err error) (Certificate, error) { return Certificate{}, err } + + var cert Certificate + var skippedBlockTypes []string + for { + var certDERBlock *pem.Block + certDERBlock, certPEMBlock = pem.Decode(certPEMBlock) + if certDERBlock == nil { + break + } + if certDERBlock.Type == "CERTIFICATE" { + cert.Certificate = append(cert.Certificate, certDERBlock.Bytes) + } else { + skippedBlockTypes = append(skippedBlockTypes, certDERBlock.Type) + } + } + + if len(cert.Certificate) == 0 { + if len(skippedBlockTypes) == 0 { + return fail(errors.New("tls: failed to find any PEM data in certificate input")) + } + if len(skippedBlockTypes) == 1 && strings.HasSuffix(skippedBlockTypes[0], "PRIVATE KEY") { + return fail(errors.New("tls: failed to find certificate PEM data in certificate input, but did find a private key; PEM inputs may have been switched")) + } + return fail(fmt.Errorf("tls: failed to find \"CERTIFICATE\" PEM block in certificate input after skipping PEM blocks of the following types: %v", skippedBlockTypes)) + } + + skippedBlockTypes = skippedBlockTypes[:0] + var keyDERBlock *pem.Block + for { + keyDERBlock, keyPEMBlock = pem.Decode(keyPEMBlock) + if keyDERBlock == nil { + if len(skippedBlockTypes) == 0 { + return fail(errors.New("tls: failed to find any PEM data in key input")) + } + if len(skippedBlockTypes) == 1 && skippedBlockTypes[0] == "CERTIFICATE" { + return fail(errors.New("tls: found a certificate rather than a key in the PEM for the private key")) + } + return fail(fmt.Errorf("tls: failed to find PEM block with type ending in \"PRIVATE KEY\" in key input after skipping PEM blocks of the following types: %v", skippedBlockTypes)) + } + if keyDERBlock.Type == "PRIVATE KEY" || strings.HasSuffix(keyDERBlock.Type, " PRIVATE KEY") { + break + } + skippedBlockTypes = append(skippedBlockTypes, keyDERBlock.Type) + } + + // We don't need to parse the public key for TLS, but we so do anyway + // to check that it looks sane and matches the private key. + x509Cert, err := x509.ParseCertificate(cert.Certificate[0]) + if err != nil { + return fail(err) + } + + // [uTLS section begins] + // if x509keypairleaf.Value() != "0" { + // cert.Leaf = x509Cert + // } else { + // x509keypairleaf.IncNonDefault() + // } + // [uTLS section ends] + + cert.PrivateKey, err = parsePrivateKey(keyDERBlock.Bytes) + if err != nil { + return fail(err) + } + + switch pub := x509Cert.PublicKey.(type) { + case *rsa.PublicKey: + priv, ok := cert.PrivateKey.(*rsa.PrivateKey) + if !ok { + return fail(errors.New("tls: private key type does not match public key type")) + } + if pub.N.Cmp(priv.N) != 0 { + return fail(errors.New("tls: private key does not match public key")) + } + case *ecdsa.PublicKey: + priv, ok := cert.PrivateKey.(*ecdsa.PrivateKey) + if !ok { + return fail(errors.New("tls: private key type does not match public key type")) + } + if pub.X.Cmp(priv.X) != 0 || pub.Y.Cmp(priv.Y) != 0 { + return fail(errors.New("tls: private key does not match public key")) + } + case ed25519.PublicKey: + priv, ok := cert.PrivateKey.(ed25519.PrivateKey) + if !ok { + return fail(errors.New("tls: private key type does not match public key type")) + } + if !bytes.Equal(priv.Public().(ed25519.PublicKey), pub) { + return fail(errors.New("tls: private key does not match public key")) + } + default: + return fail(errors.New("tls: unknown public key algorithm")) + } + + return cert, nil +} + +// Attempt to parse the given private key DER block. OpenSSL 0.9.8 generates +// PKCS #1 private keys by default, while OpenSSL 1.0.0 generates PKCS #8 keys. +// OpenSSL ecparam generates SEC1 EC private keys for ECDSA. We try all three. +func parsePrivateKey(der []byte) (crypto.PrivateKey, error) { + if key, err := x509.ParsePKCS1PrivateKey(der); err == nil { + return key, nil + } + if key, err := x509.ParsePKCS8PrivateKey(der); err == nil { + switch key := key.(type) { + case *rsa.PrivateKey, *ecdsa.PrivateKey, ed25519.PrivateKey: + return key, nil + default: + return nil, errors.New("tls: found unknown private key type in PKCS#8 wrapping") + } + } + if key, err := x509.ParseECPrivateKey(der); err == nil { + return key, nil + } + + return nil, errors.New("tls: failed to parse private key") +} diff --git a/backend/vendor/github.com/enetx/utls/u_alias.go b/backend/vendor/github.com/enetx/utls/u_alias.go new file mode 100644 index 0000000..a1360c5 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_alias.go @@ -0,0 +1,39 @@ +package tls + +import ( + "crypto/ecdh" +) + +// This file contains all the alias functions, symbols, names, etc. that +// was once used in the old version of the library. This is to ensure +// backwards compatibility with the old version of the library. + +// TLS Extensions + +// UtlsExtendedMasterSecretExtension is an alias for ExtendedMasterSecretExtension. +// +// Deprecated: Use ExtendedMasterSecretExtension instead. +type UtlsExtendedMasterSecretExtension = ExtendedMasterSecretExtension + +// Deprecated: Use KeySharePrivateKeys instead. This type is not used and will be removed in the future. +// KeySharesParameters serves as a in-memory storage for generated keypairs by UTLS when generating +// ClientHello. It is used to store both ecdhe and kem keypairs. +type KeySharesParameters struct{} + +func NewKeySharesParameters() *KeySharesParameters { return &KeySharesParameters{} } + +func (*KeySharesParameters) AddEcdheKeypair(curveID CurveID, ecdheKey *ecdh.PrivateKey, ecdhePubKey *ecdh.PublicKey) { + return +} + +func (*KeySharesParameters) GetEcdheKey(curveID CurveID) (ecdheKey *ecdh.PrivateKey, ok bool) { return } + +func (*KeySharesParameters) GetEcdhePubkey(curveID CurveID) (params *ecdh.PublicKey, ok bool) { return } + +func (*KeySharesParameters) AddKemKeypair(curveID CurveID, kemKey any, kemPubKey any) { + return +} + +func (ksp *KeySharesParameters) GetKemKey(curveID CurveID) (kemKey any, ok bool) { return } + +func (ksp *KeySharesParameters) GetKemPubkey(curveID CurveID) (params any, ok bool) { return } diff --git a/backend/vendor/github.com/enetx/utls/u_clienthello_json.go b/backend/vendor/github.com/enetx/utls/u_clienthello_json.go new file mode 100644 index 0000000..d5e38e1 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_clienthello_json.go @@ -0,0 +1,184 @@ +package tls + +import ( + "encoding/json" + "errors" + "fmt" + "os" + + "github.com/enetx/utls/dicttls" +) + +var ErrUnknownExtension = errors.New("extension name is unknown to the dictionary") + +type ClientHelloSpecJSONUnmarshaler struct { + CipherSuites *CipherSuitesJSONUnmarshaler `json:"cipher_suites"` + CompressionMethods *CompressionMethodsJSONUnmarshaler `json:"compression_methods"` + Extensions *TLSExtensionsJSONUnmarshaler `json:"extensions"` + TLSVersMin uint16 `json:"min_vers,omitempty"` // optional + TLSVersMax uint16 `json:"max_vers,omitempty"` // optional +} + +func (chsju *ClientHelloSpecJSONUnmarshaler) ClientHelloSpec() ClientHelloSpec { + return ClientHelloSpec{ + CipherSuites: chsju.CipherSuites.CipherSuites(), + CompressionMethods: chsju.CompressionMethods.CompressionMethods(), + Extensions: chsju.Extensions.Extensions(), + TLSVersMin: chsju.TLSVersMin, + TLSVersMax: chsju.TLSVersMax, + } +} + +type CipherSuitesJSONUnmarshaler struct { + cipherSuites []uint16 +} + +func (c *CipherSuitesJSONUnmarshaler) UnmarshalJSON(jsonStr []byte) error { + var cipherSuiteNames []string + if err := json.Unmarshal(jsonStr, &cipherSuiteNames); err != nil { + return err + } + + for _, name := range cipherSuiteNames { + if name == "GREASE" { + c.cipherSuites = append(c.cipherSuites, GREASE_PLACEHOLDER) + continue + } + + if id, ok := dicttls.DictCipherSuiteNameIndexed[name]; ok { + c.cipherSuites = append(c.cipherSuites, id) + } else { + return fmt.Errorf("unknown cipher suite name: %s", name) + } + } + + return nil +} + +func (c *CipherSuitesJSONUnmarshaler) CipherSuites() []uint16 { + return c.cipherSuites +} + +type CompressionMethodsJSONUnmarshaler struct { + compressionMethods []uint8 +} + +func (c *CompressionMethodsJSONUnmarshaler) UnmarshalJSON(jsonStr []byte) error { + var compressionMethodNames []string + if err := json.Unmarshal(jsonStr, &compressionMethodNames); err != nil { + return err + } + + for _, name := range compressionMethodNames { + if id, ok := dicttls.DictCompMethNameIndexed[name]; ok { + c.compressionMethods = append(c.compressionMethods, id) + } else { + return fmt.Errorf("unknown compression method name: %s", name) + } + } + + return nil +} + +func (c *CompressionMethodsJSONUnmarshaler) CompressionMethods() []uint8 { + return c.compressionMethods +} + +type TLSExtensionsJSONUnmarshaler struct { + AllowUnknownExt bool // if set, unknown extensions will be added as GenericExtension, without recovering ext payload + UseRealPSK bool // if set, PSK extension will be real PSK extension, otherwise it will be fake PSK extension + extensions []TLSExtensionJSON +} + +func (e *TLSExtensionsJSONUnmarshaler) UnmarshalJSON(jsonStr []byte) error { + var accepters []tlsExtensionJSONAccepter + if err := json.Unmarshal(jsonStr, &accepters); err != nil { + return err + } + + var exts []TLSExtensionJSON = make([]TLSExtensionJSON, 0, len(accepters)) + for _, accepter := range accepters { + if accepter.extNameOnly.Name == "GREASE" { + exts = append(exts, &UtlsGREASEExtension{}) + continue + } + + if extID, ok := dicttls.DictExtTypeNameIndexed[accepter.extNameOnly.Name]; !ok { + return fmt.Errorf("%w: %s", ErrUnknownExtension, accepter.extNameOnly.Name) + } else { + // get extension type from ID + var ext TLSExtension = ExtensionFromID(extID) + if ext == nil { + if e.AllowUnknownExt { + // fallback to generic extension, without recovering ext payload + ext = genericExtension(extID, accepter.extNameOnly.Name) + } else { + return fmt.Errorf("extension %s (%d) is not JSON compatible", accepter.extNameOnly.Name, extID) + } + } + + switch extID { + case extensionPreSharedKey: + // PSK extension, need to see if we do real or fake PSK + if e.UseRealPSK { + ext = &UtlsPreSharedKeyExtension{} + } else { + ext = &FakePreSharedKeyExtension{} + } + } + + if extJsonCompatible, ok := ext.(TLSExtensionJSON); ok { + exts = append(exts, extJsonCompatible) + } else { + return fmt.Errorf("extension %s (%d) is not JSON compatible", accepter.extNameOnly.Name, extID) + } + } + } + + // unmashal extensions + for idx, ext := range exts { + // json.Unmarshal will call the UnmarshalJSON method of the extension + if err := json.Unmarshal(accepters[idx].origJsonInput, ext); err != nil { + return err + } + } + + e.extensions = exts + return nil +} + +func (e *TLSExtensionsJSONUnmarshaler) Extensions() []TLSExtension { + var exts []TLSExtension = make([]TLSExtension, 0, len(e.extensions)) + for _, ext := range e.extensions { + exts = append(exts, ext) + } + return exts +} + +func genericExtension(id uint16, name string) TLSExtension { + var warningMsg string = "WARNING: extension " + warningMsg += fmt.Sprintf("%d ", id) + if len(name) > 0 { + warningMsg += fmt.Sprintf("(%s) ", name) + } + warningMsg += "is falling back to generic extension" + warningMsg += "\n" + + fmt.Fprint(os.Stderr, warningMsg) + + // fallback to generic extension + return &GenericExtension{Id: id} +} + +type tlsExtensionJSONAccepter struct { + extNameOnly struct { + Name string `json:"name"` + } + origJsonInput []byte +} + +func (t *tlsExtensionJSONAccepter) UnmarshalJSON(jsonStr []byte) error { + t.origJsonInput = make([]byte, len(jsonStr)) + copy(t.origJsonInput, jsonStr) + return json.Unmarshal(jsonStr, &t.extNameOnly) +} diff --git a/backend/vendor/github.com/enetx/utls/u_common.go b/backend/vendor/github.com/enetx/utls/u_common.go new file mode 100644 index 0000000..8f08da3 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_common.go @@ -0,0 +1,822 @@ +// Copyright 2017 Google Inc. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto/hmac" + "crypto/sha512" + "encoding/json" + "errors" + "fmt" + "hash" + "log" + + "github.com/enetx/utls/internal/helper" + "golang.org/x/crypto/cryptobyte" +) + +// Naming convention: +// Unsupported things are prefixed with "Fake" +// Things, supported by utls, but not crypto/tls' are prefixed with "utls" +// Supported things, that have changed their ID are prefixed with "Old" +// Supported but disabled things are prefixed with "Disabled". We will _enable_ them. + +// TLS handshake message types. +const ( + utlsTypeEncryptedExtensions uint8 = 8 // implemention incomplete by crypto/tls + // https://datatracker.ietf.org/doc/html/rfc8879#section-7.2 + utlsTypeCompressedCertificate uint8 = 25 +) + +// TLS +const ( + extensionNextProtoNeg uint16 = 13172 // not IANA assigned. Removed by crypto/tls since Nov 2019 + + utlsExtensionPadding uint16 = 21 + utlsExtensionCompressCertificate uint16 = 27 // https://datatracker.ietf.org/doc/html/rfc8879#section-7.1 + utlsExtensionApplicationSettings uint16 = 17513 // not IANA assigned + utlsExtensionApplicationSettingsNew uint16 = 17613 // not IANA assigned + utlsFakeExtensionCustom uint16 = 1234 // not IANA assigned, for ALPS + utlsExtensionECH uint16 = 0xfe0d // draft-ietf-tls-esni-17 + utlsExtensionECHOuterExtensions uint16 = 0xfd00 // draft-ietf-tls-esni-17 + + // extensions with 'fake' prefix break connection, if server echoes them back + fakeExtensionEncryptThenMAC uint16 = 22 + fakeExtensionTokenBinding uint16 = 24 + fakeExtensionDelegatedCredentials uint16 = 34 + fakeExtensionPreSharedKey uint16 = 41 + fakeOldExtensionChannelID uint16 = 30031 // not IANA assigned + fakeExtensionChannelID uint16 = 30032 // not IANA assigned +) + +const ( + OLD_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 = uint16(0xcc13) + OLD_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 = uint16(0xcc14) + + DISABLED_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 = uint16(0xc024) + DISABLED_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 = uint16(0xc028) + DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256 = uint16(0x003d) + + FAKE_OLD_TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256 = uint16(0xcc15) // we can try to craft these ciphersuites + FAKE_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 = uint16(0x009e) // from existing pieces, if needed + + FAKE_TLS_DHE_RSA_WITH_AES_128_CBC_SHA = uint16(0x0033) + FAKE_TLS_DHE_RSA_WITH_AES_256_CBC_SHA = uint16(0x0039) + FAKE_TLS_RSA_WITH_RC4_128_MD5 = uint16(0x0004) + FAKE_TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 = uint16(0x009f) + FAKE_TLS_DHE_DSS_WITH_AES_128_CBC_SHA = uint16(0x0032) + FAKE_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 = uint16(0x006b) + FAKE_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 = uint16(0x0067) + FAKE_TLS_EMPTY_RENEGOTIATION_INFO_SCSV = uint16(0x00ff) + + // https://docs.microsoft.com/en-us/dotnet/api/system.net.security.tlsciphersuite?view=netcore-3.1 + FAKE_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA = uint16(0xc008) +) + +const ( + CurveSECP256R1 CurveID = 0x0017 + CurveSECP384R1 CurveID = 0x0018 + CurveSECP521R1 CurveID = 0x0019 + CurveX25519 CurveID = 0x001d + + FakeCurveFFDHE2048 CurveID = 0x0100 + FakeCurveFFDHE3072 CurveID = 0x0101 + FakeCurveFFDHE4096 CurveID = 0x0102 + FakeCurveFFDHE6144 CurveID = 0x0103 + FakeCurveFFDHE8192 CurveID = 0x0104 +) + +const ( + X25519Kyber768Draft00 CurveID = 0x6399 + + FakeCurveX25519Kyber512Draft00 CurveID = 0xfe30 + FakeCurveX25519Kyber768Draft00Old CurveID = 0xfe31 + FakeCurveP256Kyber768Draft00 CurveID = 0xfe32 + + X25519Kyber512Draft00 CurveID = FakeCurveX25519Kyber512Draft00 + X25519Kyber768Draft00Old CurveID = FakeCurveX25519Kyber768Draft00Old + P256Kyber768Draft00 CurveID = FakeCurveP256Kyber768Draft00 +) + +// Other things +const ( + fakeRecordSizeLimit uint16 = 0x001c +) + +// newest signatures +var ( + FakePKCS1WithSHA224 SignatureScheme = 0x0301 + FakeECDSAWithSHA224 SignatureScheme = 0x0303 + + FakeSHA1WithDSA SignatureScheme = 0x0202 + FakeSHA256WithDSA SignatureScheme = 0x0402 + + // fakeEd25519 = SignatureAndHash{0x08, 0x07} + // fakeEd448 = SignatureAndHash{0x08, 0x08} +) + +// fake curves(groups) +var ( + FakeFFDHE2048 = uint16(0x0100) + FakeFFDHE3072 = uint16(0x0101) +) + +// https://tools.ietf.org/html/draft-ietf-tls-certificate-compression-04 +type CertCompressionAlgo uint16 + +const ( + CertCompressionZlib CertCompressionAlgo = 0x0001 + CertCompressionBrotli CertCompressionAlgo = 0x0002 + CertCompressionZstd CertCompressionAlgo = 0x0003 +) + +const ( + PskModePlain uint8 = pskModePlain + PskModeDHE uint8 = pskModeDHE +) + +type ClientHelloID struct { + Client string + + // Version specifies version of a mimicked clients (e.g. browsers). + // Not used in randomized, custom handshake, and default Go. + Version string + + // Seed is only used for randomized fingerprints to seed PRNG. + // Must not be modified once set. + Seed *PRNGSeed + + // Weights are only used for randomized fingerprints in func + // generateRandomizedSpec(). Must not be modified once set. + Weights *Weights +} + +func (p *ClientHelloID) Str() string { + return fmt.Sprintf("%s-%s", p.Client, p.Version) +} + +func (p *ClientHelloID) IsSet() bool { + return (p.Client == "") && (p.Version == "") +} + +const ( + // clients + helloGolang = "Golang" + helloRandomized = "Randomized" + helloRandomizedALPN = "Randomized-ALPN" + helloRandomizedNoALPN = "Randomized-NoALPN" + helloCustom = "Custom" + helloFirefox = "Firefox" + helloChrome = "Chrome" + helloIOS = "iOS" + helloAndroid = "Android" + helloEdge = "Edge" + helloSafari = "Safari" + hello360 = "360Browser" + helloQQ = "QQBrowser" + + // versions + helloAutoVers = "0" +) + +type ClientHelloSpec struct { + CipherSuites []uint16 // nil => default + CompressionMethods []uint8 // nil => no compression + Extensions []TLSExtension // nil => no extensions + + TLSVersMin uint16 // [1.0-1.3] default: parse from .Extensions, if SupportedVersions ext is not present => 1.0 + TLSVersMax uint16 // [1.2-1.3] default: parse from .Extensions, if SupportedVersions ext is not present => 1.2 + + // GreaseStyle: currently only random + // sessionID may or may not depend on ticket; nil => random + GetSessionID func(ticket []byte) [32]byte + + // TLSFingerprintLink string // ?? link to tlsfingerprint.io for informational purposes +} + +// ReadCipherSuites is a helper function to construct a list of cipher suites from +// a []byte into []uint16. +// +// example: []byte{0x13, 0x01, 0x13, 0x02, 0x13, 0x03} => []uint16{0x1301, 0x1302, 0x1303} +func (chs *ClientHelloSpec) ReadCipherSuites(b []byte) error { + cipherSuites := []uint16{} + s := cryptobyte.String(b) + for !s.Empty() { + var suite uint16 + if !s.ReadUint16(&suite) { + return errors.New("unable to read ciphersuite") + } + cipherSuites = append(cipherSuites, unGREASEUint16(suite)) + } + chs.CipherSuites = cipherSuites + return nil +} + +// ReadCompressionMethods is a helper function to construct a list of compression +// methods from a []byte into []uint8. +func (chs *ClientHelloSpec) ReadCompressionMethods(compressionMethods []byte) error { + chs.CompressionMethods = compressionMethods + return nil +} + +// ReadTLSExtensions is a helper function to construct a list of TLS extensions from +// a byte slice into []TLSExtension. +func (chs *ClientHelloSpec) ReadTLSExtensions(b []byte, allowBluntMimicry bool, realPSK bool) error { + extensions := cryptobyte.String(b) + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) { + return fmt.Errorf("unable to read extension ID") + } + if !extensions.ReadUint16LengthPrefixed(&extData) { + return fmt.Errorf("unable to read data for extension %x", extension) + } + + ext := ExtensionFromID(extension) + extWriter, ok := ext.(TLSExtensionWriter) + if ext != nil && ok { // known extension and implements TLSExtensionWriter properly + switch extension { + case extensionPreSharedKey: + // PSK extension, need to see if we do real or fake PSK + if realPSK { + extWriter = &UtlsPreSharedKeyExtension{} + } else { + extWriter = &FakePreSharedKeyExtension{} + } + case extensionSupportedVersions: + chs.TLSVersMin = 0 + chs.TLSVersMax = 0 + } + + if _, err := extWriter.Write(extData); err != nil { + return err + } + + chs.Extensions = append(chs.Extensions, extWriter) + } else { + if allowBluntMimicry { + chs.Extensions = append(chs.Extensions, &GenericExtension{extension, extData}) + } else { + return fmt.Errorf("unsupported extension %d", extension) + } + } + } + return nil +} + +func (chs *ClientHelloSpec) AlwaysAddPadding() { + alreadyHasPadding := false + for idx, ext := range chs.Extensions { + if _, ok := ext.(*UtlsPaddingExtension); ok { + alreadyHasPadding = true + break + } + if _, ok := ext.(PreSharedKeyExtension); ok { + alreadyHasPadding = true // PSK must be last, so we can't append padding after it + // instead we will insert padding before PSK + chs.Extensions = append(chs.Extensions[:idx], append([]TLSExtension{&UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}}, chs.Extensions[idx:]...)...) + break + } + } + if !alreadyHasPadding { + chs.Extensions = append(chs.Extensions, &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}) + } +} + +// Import TLS ClientHello data from client.tlsfingerprint.io:8443 +// +// data is a map of []byte with following keys: +// - cipher_suites: [10, 10, 19, 1, 19, 2, 19, 3, 192, 43, 192, 47, 192, 44, 192, 48, 204, 169, 204, 168, 192, 19, 192, 20, 0, 156, 0, 157, 0, 47, 0, 53] +// - compression_methods: [0] => null +// - extensions: [10, 10, 255, 1, 0, 45, 0, 35, 0, 16, 68, 105, 0, 11, 0, 43, 0, 18, 0, 13, 0, 0, 0, 10, 0, 27, 0, 5, 0, 51, 0, 23, 10, 10, 0, 21] +// - pt_fmts (ec_point_formats): [1, 0] => len: 1, content: 0x00 +// - sig_algs （signature_algorithms): [0, 16, 4, 3, 8, 4, 4, 1, 5, 3, 8, 5, 5, 1, 8, 6, 6, 1] => len: 16, content: 0x0403, 0x0804, 0x0401, 0x0503, 0x0805, 0x0501, 0x0806, 0x0601 +// - supported_versions: [10, 10, 3, 4, 3, 3] => 0x0a0a, 0x0304, 0x0303 (GREASE, TLS 1.3, TLS 1.2) +// - curves (named_groups, supported_groups): [0, 8, 10, 10, 0, 29, 0, 23, 0, 24] => len: 8, content: GREASE, 0x001d, 0x0017, 0x0018 +// - alpn: [0, 12, 2, 104, 50, 8, 104, 116, 116, 112, 47, 49, 46, 49] => len: 12, content: h2, http/1.1 +// - key_share: [10, 10, 0, 1, 0, 29, 0, 32] => {group: 0x0a0a, len:1}, {group: 0x001d, len:32} +// - psk_key_exchange_modes: [1] => psk_dhe_ke(0x01) +// - cert_compression_algs: [2, 0, 2] => brotli (0x0002) +// - record_size_limit: [0, 255] => 255 +// +// TLSVersMin/TLSVersMax are set to 0 if supported_versions is present. +// To prevent conflict, they should be set manually if needed BEFORE calling this function. +func (chs *ClientHelloSpec) ImportTLSClientHello(data map[string][]byte) error { + var tlsExtensionTypes []uint16 + var err error + + if data["cipher_suites"] == nil { + return errors.New("cipher_suites is required") + } + chs.CipherSuites, err = helper.Uint8to16(data["cipher_suites"]) + if err != nil { + return err + } + + if data["compression_methods"] == nil { + return errors.New("compression_methods is required") + } + chs.CompressionMethods = data["compression_methods"] + + if data["extensions"] == nil { + return errors.New("extensions is required") + } + tlsExtensionTypes, err = helper.Uint8to16(data["extensions"]) + if err != nil { + return err + } + + for _, extType := range tlsExtensionTypes { + extension := ExtensionFromID(extType) + extWriter, ok := extension.(TLSExtensionWriter) + if !ok { + return fmt.Errorf("unsupported extension %d", extType) + } + if extension == nil || !ok { + log.Printf("[Warning] Unsupported extension %d added as a &GenericExtension without Data", extType) + chs.Extensions = append(chs.Extensions, &GenericExtension{extType, []byte{}}) + } else { + switch extType { + case extensionSupportedPoints: + if data["pt_fmts"] == nil { + return errors.New("pt_fmts is required") + } + _, err = extWriter.Write(data["pt_fmts"]) + if err != nil { + return err + } + case extensionSignatureAlgorithms: + if data["sig_algs"] == nil { + return errors.New("sig_algs is required") + } + _, err = extWriter.Write(data["sig_algs"]) + if err != nil { + return err + } + case extensionSupportedVersions: + chs.TLSVersMin = 0 + chs.TLSVersMax = 0 + + if data["supported_versions"] == nil { + return errors.New("supported_versions is required") + } + + // need to add uint8 length prefix + fixedData := make([]byte, len(data["supported_versions"])+1) + fixedData[0] = uint8(len(data["supported_versions"]) & 0xff) + copy(fixedData[1:], data["supported_versions"]) + _, err = extWriter.Write(fixedData) + if err != nil { + return err + } + case extensionSupportedCurves: + if data["curves"] == nil { + return errors.New("curves is required") + } + + _, err = extWriter.Write(data["curves"]) + if err != nil { + return err + } + case extensionALPN: + if data["alpn"] == nil { + return errors.New("alpn is required") + } + + _, err = extWriter.Write(data["alpn"]) + if err != nil { + return err + } + case extensionKeyShare: + if data["key_share"] == nil { + return errors.New("key_share is required") + } + + // need to add (zero) data per each key share, [10, 10, 0, 1] => [10, 10, 0, 1, 0] + fixedData := make([]byte, 0) + for i := 0; i < len(data["key_share"]); i += 4 { + fixedData = append(fixedData, data["key_share"][i:i+4]...) + for j := 0; j < int(data["key_share"][i+3]); j++ { + fixedData = append(fixedData, 0) + } + } + // add uint16 length prefix + fixedData = append([]byte{uint8(len(fixedData) >> 8), uint8(len(fixedData) & 0xff)}, fixedData...) + + _, err = extWriter.Write(fixedData) + if err != nil { + return err + } + case extensionPSKModes: + if data["psk_key_exchange_modes"] == nil { + return errors.New("psk_key_exchange_modes is required") + } + + // need to add uint8 length prefix + fixedData := make([]byte, len(data["psk_key_exchange_modes"])+1) + fixedData[0] = uint8(len(data["psk_key_exchange_modes"]) & 0xff) + copy(fixedData[1:], data["psk_key_exchange_modes"]) + _, err = extWriter.Write(fixedData) + if err != nil { + return err + } + case utlsExtensionCompressCertificate: + if data["cert_compression_algs"] == nil { + return errors.New("cert_compression_algs is required") + } + + // need to add uint8 length prefix + fixedData := make([]byte, len(data["cert_compression_algs"])+1) + fixedData[0] = uint8(len(data["cert_compression_algs"]) & 0xff) + copy(fixedData[1:], data["cert_compression_algs"]) + _, err = extWriter.Write(fixedData) + if err != nil { + return err + } + case fakeRecordSizeLimit: + if data["record_size_limit"] == nil { + return errors.New("record_size_limit is required") + } + + _, err = extWriter.Write(data["record_size_limit"]) // uint16 as []byte + if err != nil { + return err + } + case utlsExtensionApplicationSettings: + // TODO: tlsfingerprint.io should record/provide application settings data + extWriter.(*ApplicationSettingsExtension).SupportedProtocols = []string{"h2"} + case utlsExtensionApplicationSettingsNew: + extWriter.(*ApplicationSettingsExtensionNew).SupportedProtocols = []string{"h2"} + case extensionPreSharedKey: + log.Printf("[Warning] PSK extension added without data") + default: + if !isGREASEUint16(extType) { + log.Printf("[Warning] extension %d added without data", extType) + } /*else { + log.Printf("[Warning] GREASE extension added but ID/Data discarded. They will be automatically re-GREASEd on ApplyPreset() call.") + }*/ + } + chs.Extensions = append(chs.Extensions, extWriter) + } + } + return nil +} + +// ImportTLSClientHelloFromJSON imports ClientHelloSpec from JSON data from client.tlsfingerprint.io format +// +// It calls ImportTLSClientHello internally after unmarshaling JSON data into map[string][]byte +func (chs *ClientHelloSpec) ImportTLSClientHelloFromJSON(jsonB []byte) error { + var data map[string][]byte + err := json.Unmarshal(jsonB, &data) + if err != nil { + return err + } + return chs.ImportTLSClientHello(data) +} + +// FromRaw converts a ClientHello message in the form of raw bytes into a ClientHelloSpec. +// +// ctrlFlags: []bool{bluntMimicry, realPSK} +func (chs *ClientHelloSpec) FromRaw(raw []byte, ctrlFlags ...bool) error { + if chs == nil { + return errors.New("cannot unmarshal into nil ClientHelloSpec") + } + + var bluntMimicry = false + var realPSK = false + if len(ctrlFlags) > 0 { + bluntMimicry = ctrlFlags[0] + } + if len(ctrlFlags) > 1 { + realPSK = ctrlFlags[1] + } + + *chs = ClientHelloSpec{} // reset + s := cryptobyte.String(raw) + + var contentType uint8 + var recordVersion uint16 + if !s.ReadUint8(&contentType) || // record type + !s.ReadUint16(&recordVersion) || !s.Skip(2) { // record version and length + return errors.New("unable to read record type, version, and length") + } + + if recordType(contentType) != recordTypeHandshake { + return errors.New("record is not a handshake") + } + + var handshakeVersion uint16 + var handshakeType uint8 + + if !s.ReadUint8(&handshakeType) || !s.Skip(3) || // message type and 3 byte length + !s.ReadUint16(&handshakeVersion) || !s.Skip(32) { // 32 byte random + return errors.New("unable to read handshake message type, length, and random") + } + + if handshakeType != typeClientHello { + return errors.New("handshake message is not a ClientHello") + } + + chs.TLSVersMin = recordVersion + chs.TLSVersMax = handshakeVersion + + var ignoredSessionID cryptobyte.String + if !s.ReadUint8LengthPrefixed(&ignoredSessionID) { + return errors.New("unable to read session id") + } + + // CipherSuites + var cipherSuitesBytes cryptobyte.String + if !s.ReadUint16LengthPrefixed(&cipherSuitesBytes) { + return errors.New("unable to read ciphersuites") + } + + if err := chs.ReadCipherSuites(cipherSuitesBytes); err != nil { + return err + } + + // CompressionMethods + var compressionMethods cryptobyte.String + if !s.ReadUint8LengthPrefixed(&compressionMethods) { + return errors.New("unable to read compression methods") + } + + if err := chs.ReadCompressionMethods(compressionMethods); err != nil { + return err + } + + if s.Empty() { + // Extensions are optional + return nil + } + + var extensions cryptobyte.String + if !s.ReadUint16LengthPrefixed(&extensions) { + return errors.New("unable to read extensions data") + } + + if err := chs.ReadTLSExtensions(extensions, bluntMimicry, realPSK); err != nil { + return err + } + + // if extension list includes padding, we update the padding-to-len according to + // the raw ClientHello length + for _, ext := range chs.Extensions { + if _, ok := ext.(*UtlsPaddingExtension); ok { + ext.(*UtlsPaddingExtension).GetPaddingLen = AlwaysPadToLen(len(raw) - 5) + break + } + } + + return nil +} + +// UnmarshalJSON unmarshals a ClientHello message in the form of JSON into a ClientHelloSpec. +func (chs *ClientHelloSpec) UnmarshalJSON(jsonB []byte) error { + var chsju ClientHelloSpecJSONUnmarshaler + if err := json.Unmarshal(jsonB, &chsju); err != nil { + return err + } + + *chs = chsju.ClientHelloSpec() + return nil +} + +var ( + // HelloGolang will use default "crypto/tls" handshake marshaling codepath, which WILL + // overwrite your changes to Hello(Config, Session are fine). + // You might want to call BuildHandshakeState() before applying any changes. + // UConn.Extensions will be completely ignored. + HelloGolang = ClientHelloID{helloGolang, helloAutoVers, nil, nil} + + // HelloCustom will prepare ClientHello with empty uconn.Extensions so you can fill it with + // TLSExtensions manually or use ApplyPreset function + HelloCustom = ClientHelloID{helloCustom, helloAutoVers, nil, nil} + + // HelloRandomized* randomly adds/reorders extensions, ciphersuites, etc. + HelloRandomized = ClientHelloID{helloRandomized, helloAutoVers, nil, nil} + HelloRandomizedALPN = ClientHelloID{helloRandomizedALPN, helloAutoVers, nil, nil} + HelloRandomizedNoALPN = ClientHelloID{helloRandomizedNoALPN, helloAutoVers, nil, nil} + + // The rest will will parrot given browser. + HelloFirefox_Auto = HelloFirefox_141 + HelloFirefox_55 = ClientHelloID{helloFirefox, "55", nil, nil} + HelloFirefox_56 = ClientHelloID{helloFirefox, "56", nil, nil} + HelloFirefox_63 = ClientHelloID{helloFirefox, "63", nil, nil} + HelloFirefox_65 = ClientHelloID{helloFirefox, "65", nil, nil} + HelloFirefox_99 = ClientHelloID{helloFirefox, "99", nil, nil} + HelloFirefox_102 = ClientHelloID{helloFirefox, "102", nil, nil} + HelloFirefox_105 = ClientHelloID{helloFirefox, "105", nil, nil} + HelloFirefox_120 = ClientHelloID{helloFirefox, "120", nil, nil} + HelloFirefox_141 = ClientHelloID{helloFirefox, "141", nil, nil} + + HelloChrome_Auto = HelloChrome_133 + HelloChrome_58 = ClientHelloID{helloChrome, "58", nil, nil} + HelloChrome_62 = ClientHelloID{helloChrome, "62", nil, nil} + HelloChrome_70 = ClientHelloID{helloChrome, "70", nil, nil} + HelloChrome_72 = ClientHelloID{helloChrome, "72", nil, nil} + HelloChrome_83 = ClientHelloID{helloChrome, "83", nil, nil} + HelloChrome_87 = ClientHelloID{helloChrome, "87", nil, nil} + HelloChrome_96 = ClientHelloID{helloChrome, "96", nil, nil} + HelloChrome_100 = ClientHelloID{helloChrome, "100", nil, nil} + HelloChrome_102 = ClientHelloID{helloChrome, "102", nil, nil} + HelloChrome_106_Shuffle = ClientHelloID{helloChrome, "106", nil, nil} // TLS Extension shuffler enabled starting from 106 + + // Chrome w/ PSK: Chrome start sending this ClientHello after doing TLS 1.3 handshake with the same server. + // Beta: PSK extension added. However, uTLS doesn't ship with full PSK support. + // Use at your own discretion. + HelloChrome_100_PSK = ClientHelloID{helloChrome, "100_PSK", nil, nil} + HelloChrome_112_PSK_Shuf = ClientHelloID{helloChrome, "112_PSK", nil, nil} + HelloChrome_114_Padding_PSK_Shuf = ClientHelloID{helloChrome, "114_PSK", nil, nil} + + // Chrome w/ Post-Quantum Key Agreement + // Beta: PQ extension added. However, uTLS doesn't ship with full PQ support. Use at your own discretion. + HelloChrome_115_PQ = ClientHelloID{helloChrome, "115_PQ", nil, nil} + HelloChrome_115_PQ_PSK = ClientHelloID{helloChrome, "115_PQ_PSK", nil, nil} + + // Chrome ECH + HelloChrome_120 = ClientHelloID{helloChrome, "120", nil, nil} + // Chrome w/ Post-Quantum Key Agreement and Encrypted ClientHello + HelloChrome_120_PQ = ClientHelloID{helloChrome, "120_PQ", nil, nil} + // Chrome w/ ML-KEM curve + HelloChrome_131 = ClientHelloID{helloChrome, "131", nil, nil} + // Chrome w/ New ALPS codepoint + HelloChrome_133 = ClientHelloID{helloChrome, "133", nil, nil} + + HelloIOS_Auto = HelloIOS_14 + HelloIOS_11_1 = ClientHelloID{helloIOS, "111", nil, nil} // legacy "111" means 11.1 + HelloIOS_12_1 = ClientHelloID{helloIOS, "12.1", nil, nil} + HelloIOS_13 = ClientHelloID{helloIOS, "13", nil, nil} + HelloIOS_14 = ClientHelloID{helloIOS, "14", nil, nil} + + HelloAndroid_11_OkHttp = ClientHelloID{helloAndroid, "11", nil, nil} + + HelloEdge_Auto = HelloEdge_85 // HelloEdge_106 seems to be incompatible with this library + HelloEdge_85 = ClientHelloID{helloEdge, "85", nil, nil} + HelloEdge_106 = ClientHelloID{helloEdge, "106", nil, nil} + + HelloSafari_Auto = HelloSafari_16_0 + HelloSafari_16_0 = ClientHelloID{helloSafari, "16.0", nil, nil} + + Hello360_Auto = Hello360_7_5 // Hello360_11_0 seems to be incompatible with this library + Hello360_7_5 = ClientHelloID{hello360, "7.5", nil, nil} + Hello360_11_0 = ClientHelloID{hello360, "11.0", nil, nil} + + HelloQQ_Auto = HelloQQ_11_1 + HelloQQ_11_1 = ClientHelloID{helloQQ, "11.1", nil, nil} +) + +type Weights struct { + Extensions_Append_ALPN float64 + TLSVersMax_Set_VersionTLS13 float64 + CipherSuites_Remove_RandomCiphers float64 + SigAndHashAlgos_Append_ECDSAWithSHA1 float64 + SigAndHashAlgos_Append_ECDSAWithP521AndSHA512 float64 + SigAndHashAlgos_Append_PSSWithSHA256 float64 + SigAndHashAlgos_Append_PSSWithSHA384_PSSWithSHA512 float64 + CurveIDs_Append_X25519 float64 + CurveIDs_Append_CurveP521 float64 + Extensions_Append_Padding float64 + Extensions_Append_Status float64 + Extensions_Append_SCT float64 + Extensions_Append_Reneg float64 + Extensions_Append_EMS float64 + FirstKeyShare_Set_CurveP256 float64 + KeyShare_Append_RandomGroups float64 + Extensions_Append_ALPS float64 +} + +// Do not modify them directly as they may being used. If you +// want to use your custom weights, please make a copy first. +var DefaultWeights = Weights{ + Extensions_Append_ALPN: 0.7, + TLSVersMax_Set_VersionTLS13: 0.4, + CipherSuites_Remove_RandomCiphers: 0.4, + SigAndHashAlgos_Append_ECDSAWithSHA1: 0.63, + SigAndHashAlgos_Append_ECDSAWithP521AndSHA512: 0.59, + SigAndHashAlgos_Append_PSSWithSHA256: 0.51, + SigAndHashAlgos_Append_PSSWithSHA384_PSSWithSHA512: 0.9, + CurveIDs_Append_X25519: 0.71, + CurveIDs_Append_CurveP521: 0.46, + Extensions_Append_Padding: 0.62, + Extensions_Append_Status: 0.74, + Extensions_Append_SCT: 0.46, + Extensions_Append_Reneg: 0.75, + Extensions_Append_EMS: 0.77, + FirstKeyShare_Set_CurveP256: 0.00, // legacy setting + KeyShare_Append_RandomGroups: 0.50, + Extensions_Append_ALPS: 0.33, +} + +// based on spec's GreaseStyle, GREASE_PLACEHOLDER may be replaced by another GREASE value +// https://tools.ietf.org/html/draft-ietf-tls-grease-01 +const GREASE_PLACEHOLDER = 0x0a0a + +func isGREASEUint16(v uint16) bool { + // First byte is same as second byte + // and lowest nibble is 0xa + return ((v >> 8) == v&0xff) && v&0xf == 0xa +} + +func unGREASEUint16(v uint16) uint16 { + if isGREASEUint16(v) { + return GREASE_PLACEHOLDER + } else { + return v + } +} + +// utlsMacSHA384 returns a SHA-384 based MAC. These are only supported in TLS 1.2 +// so the given version is ignored. +func utlsMacSHA384(key []byte) hash.Hash { + return hmac.New(sha512.New384, key) +} + +var utlsSupportedCipherSuites []*cipherSuite + +func init() { + utlsSupportedCipherSuites = append(cipherSuites, []*cipherSuite{ + {OLD_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, 32, 0, 12, ecdheRSAKA, + suiteECDHE | suiteTLS12, nil, nil, aeadChaCha20Poly1305}, + {OLD_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, 32, 0, 12, ecdheECDSAKA, + suiteECDHE | suiteECSign | suiteTLS12, nil, nil, aeadChaCha20Poly1305}, + }...) +} + +// EnableWeakCiphers allows utls connections to continue in some cases, when weak cipher was chosen. +// This provides better compatibility with servers on the web, but weakens security. Feel free +// to use this option if you establish additional secure connection inside of utls connection. +// This option does not change the shape of parrots (i.e. same ciphers will be offered either way). +// Must be called before establishing any connections. +func EnableWeakCiphers() { + utlsSupportedCipherSuites = append(cipherSuites, []*cipherSuite{ + {DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256, 32, 32, 16, rsaKA, + suiteTLS12, cipherAES, macSHA256, nil}, + + {DISABLED_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, 32, 48, 16, ecdheECDSAKA, + suiteECDHE | suiteECSign | suiteTLS12 | suiteSHA384, cipherAES, utlsMacSHA384, nil}, + {DISABLED_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, 32, 48, 16, ecdheRSAKA, + suiteECDHE | suiteTLS12 | suiteSHA384, cipherAES, utlsMacSHA384, nil}, + }...) +} + +func mapSlice[T any, U any](slice []T, transform func(T) U) []U { + newSlice := make([]U, 0, len(slice)) + for _, t := range slice { + newSlice = append(newSlice, transform(t)) + } + return newSlice +} + +func panicOnNil(caller string, params ...any) { + for i, p := range params { + if p == nil { + panic(fmt.Sprintf("tls: %s failed: the [%d] parameter is nil", caller, i)) + } + } +} + +func anyTrue[T any](slice []T, predicate func(i int, t *T) bool) bool { + for i := 0; i < len(slice); i++ { + if predicate(i, &slice[i]) { + return true + } + } + return false +} + +func allTrue[T any](slice []T, predicate func(i int, t *T) bool) bool { + for i := 0; i < len(slice); i++ { + if !predicate(i, &slice[i]) { + return false + } + } + return true +} + +func uAssert(condition bool, msg string) { + if !condition { + panic(msg) + } +} + +func sliceEq[T comparable](sliceA []T, sliceB []T) bool { + if len(sliceA) != len(sliceB) { + return false + } + for i := 0; i < len(sliceA); i++ { + if sliceA[i] != sliceB[i] { + return false + } + } + return true +} + +type Initializable interface { + // IsInitialized returns a boolean indicating whether the extension has been initialized. + // If false is returned, utls will initialize the extension. + IsInitialized() bool +} diff --git a/backend/vendor/github.com/enetx/utls/u_conn.go b/backend/vendor/github.com/enetx/utls/u_conn.go new file mode 100644 index 0000000..549069c --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_conn.go @@ -0,0 +1,984 @@ +// Copyright 2017 Google Inc. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bufio" + "bytes" + "context" + "crypto/cipher" + "encoding/binary" + "errors" + "fmt" + "hash" + "net" + "slices" + "strconv" + + "golang.org/x/crypto/cryptobyte" +) + +type ClientHelloBuildStatus int + +const NotBuilt ClientHelloBuildStatus = 0 +const BuildByUtls ClientHelloBuildStatus = 1 +const BuildByGoTLS ClientHelloBuildStatus = 2 + +type UConn struct { + *Conn + + Extensions []TLSExtension + ClientHelloID ClientHelloID + sessionController *sessionController + + clientHelloBuildStatus ClientHelloBuildStatus + clientHelloSpec *ClientHelloSpec + + HandshakeState PubClientHandshakeState + + greaseSeed [ssl_grease_last_index]uint16 + + omitSNIExtension bool + + // skipResumptionOnNilExtension is copied from `Config.PreferSkipResumptionOnNilExtension`. + // + // By default, if ClientHelloSpec is predefined or utls-generated (as opposed to HelloCustom), this flag will be updated to true. + skipResumptionOnNilExtension bool + + // certCompressionAlgs represents the set of advertised certificate compression + // algorithms, as specified in the ClientHello. This is only relevant client-side, for the + // server certificate. All other forms of certificate compression are unsupported. + certCompressionAlgs []CertCompressionAlgo + + // ech extension is a shortcut to the ECH extension in the Extensions slice if there is one. + ech ECHExtension + + // echCtx is the echContex returned by makeClientHello() + echCtx *echClientContext +} + +// UClient returns a new uTLS client, with behavior depending on clientHelloID. +// Config CAN be nil, but make sure to eventually specify ServerName. +func UClient(conn net.Conn, config *Config, clientHelloID ClientHelloID) *UConn { + if config == nil { + config = &Config{} + } + tlsConn := Conn{conn: conn, config: config, isClient: true} + handshakeState := PubClientHandshakeState{C: &tlsConn, Hello: &PubClientHelloMsg{}} + uconn := UConn{Conn: &tlsConn, ClientHelloID: clientHelloID, HandshakeState: handshakeState} + uconn.HandshakeState.uconn = &uconn + uconn.handshakeFn = uconn.clientHandshake + uconn.sessionController = newSessionController(&uconn) + uconn.utls.sessionController = uconn.sessionController + uconn.skipResumptionOnNilExtension = config.PreferSkipResumptionOnNilExtension || clientHelloID.Client != helloCustom + return &uconn +} + +// BuildHandshakeState behavior varies based on ClientHelloID and +// whether it was already called before. +// If HelloGolang: +// +// [only once] make default ClientHello and overwrite existing state +// +// If any other mimicking ClientHelloID is used: +// +// [only once] make ClientHello based on ID and overwrite existing state +// [each call] apply uconn.Extensions config to internal crypto/tls structures +// [each call] marshal ClientHello. +// +// BuildHandshakeState is automatically called before uTLS performs handshake, +// and should only be called explicitly to inspect/change fields of +// default/mimicked ClientHello. +// With the excpetion of session ticket and psk extensions, which cannot be changed +// after calling BuildHandshakeState, all other fields can be modified. +func (uconn *UConn) BuildHandshakeState() error { + return uconn.buildHandshakeState(true) +} + +// BuildHandshakeStateWithoutSession is the same as BuildHandshakeState, but does not +// set the session. This is only useful when you want to inspect the ClientHello before +// setting the session manually through SetSessionTicketExtension or SetPSKExtension. +// BuildHandshakeState is automatically called before uTLS performs handshake. +func (uconn *UConn) BuildHandshakeStateWithoutSession() error { + return uconn.buildHandshakeState(false) +} + +func (uconn *UConn) buildHandshakeState(loadSession bool) error { + if uconn.ClientHelloID == HelloGolang { + if uconn.clientHelloBuildStatus == BuildByGoTLS { + return nil + } + uAssert(uconn.clientHelloBuildStatus == NotBuilt, "BuildHandshakeState failed: invalid call, client hello has already been built by utls") + + // use default Golang ClientHello. + hello, keySharePrivate, ech, err := uconn.makeClientHello() + if err != nil { + return err + } + + uconn.HandshakeState.Hello = hello.getPublicPtr() + uconn.HandshakeState.State13.KeyShareKeys = keySharePrivate.ToPublic() + uconn.HandshakeState.C = uconn.Conn + uconn.echCtx = ech + uconn.clientHelloBuildStatus = BuildByGoTLS + } else { + uAssert(uconn.clientHelloBuildStatus == BuildByUtls || uconn.clientHelloBuildStatus == NotBuilt, "BuildHandshakeState failed: invalid call, client hello has already been built by go-tls") + if uconn.clientHelloBuildStatus == NotBuilt { + err := uconn.applyPresetByID(uconn.ClientHelloID) + if err != nil { + return err + } + if uconn.omitSNIExtension { + uconn.removeSNIExtension() + } + } + + err := uconn.ApplyConfig() + if err != nil { + return err + } + + if loadSession { + err = uconn.uLoadSession() + if err != nil { + return err + } + } + + err = uconn.MarshalClientHello() + if err != nil { + return err + } + + if loadSession { + uconn.uApplyPatch() + uconn.sessionController.finalCheck() + uconn.clientHelloBuildStatus = BuildByUtls + } + + } + return nil +} + +func (uconn *UConn) uLoadSession() error { + if cfg := uconn.config; cfg.SessionTicketsDisabled || cfg.ClientSessionCache == nil { + return nil + } + switch uconn.sessionController.shouldLoadSession() { + case shouldReturn: + case shouldSetTicket: + uconn.sessionController.setSessionTicketToUConn() + case shouldSetPsk: + uconn.sessionController.setPskToUConn() + case shouldLoad: + hello := uconn.HandshakeState.Hello.getPrivatePtr() + uconn.sessionController.utlsAboutToLoadSession() + session, earlySecret, binderKey, err := uconn.loadSession(hello) + if session == nil || err != nil { + return err + } + if session.version == VersionTLS12 { + // We use the session ticket extension for tls 1.2 session resumption + uconn.sessionController.initSessionTicketExt(session, hello.sessionTicket) + uconn.sessionController.setSessionTicketToUConn() + } else { + uconn.sessionController.initPskExt(session, earlySecret, binderKey, hello.pskIdentities) + } + } + + return nil +} + +func (uconn *UConn) uApplyPatch() { + helloLen := len(uconn.HandshakeState.Hello.Raw) + if uconn.sessionController.shouldUpdateBinders() { + uconn.sessionController.updateBinders() + uconn.sessionController.setPskToUConn() + } + uAssert(helloLen == len(uconn.HandshakeState.Hello.Raw), "tls: uApplyPatch Failed: the patch should never change the length of the marshaled clientHello") +} + +func (uconn *UConn) DidTls12Resume() bool { + return uconn.didResume +} + +// SetSessionState sets the session ticket, which may be preshared or fake. +// If session is nil, the body of session ticket extension will be unset, +// but the extension itself still MAY be present for mimicking purposes. +// Session tickets to be reused - use same cache on following connections. +// +// Deprecated: This method is deprecated in favor of SetSessionTicketExtension, +// as it only handles session override of TLS 1.2 +func (uconn *UConn) SetSessionState(session *ClientSessionState) error { + sessionTicketExt := &SessionTicketExtension{Initialized: true} + if session != nil { + sessionTicketExt.Ticket = session.session.ticket + sessionTicketExt.Session = session.session + } + return uconn.SetSessionTicketExtension(sessionTicketExt) +} + +// SetSessionTicket sets the session ticket extension. +// If extension is nil, this will be a no-op. +func (uconn *UConn) SetSessionTicketExtension(sessionTicketExt ISessionTicketExtension) error { + if uconn.config.SessionTicketsDisabled || uconn.config.ClientSessionCache == nil { + return fmt.Errorf("tls: SetSessionTicketExtension failed: session is disabled") + } + if sessionTicketExt == nil { + return nil + } + return uconn.sessionController.overrideSessionTicketExt(sessionTicketExt) +} + +// SetPskExtension sets the psk extension for tls 1.3 resumption. This is a no-op if the psk is nil. +func (uconn *UConn) SetPskExtension(pskExt PreSharedKeyExtension) error { + if uconn.config.SessionTicketsDisabled || uconn.config.ClientSessionCache == nil { + return fmt.Errorf("tls: SetPskExtension failed: session is disabled") + } + if pskExt == nil { + return nil + } + + uconn.HandshakeState.Hello.TicketSupported = true + return uconn.sessionController.overridePskExt(pskExt) +} + +// If you want session tickets to be reused - use same cache on following connections +func (uconn *UConn) SetSessionCache(cache ClientSessionCache) { + uconn.config.ClientSessionCache = cache + uconn.HandshakeState.Hello.TicketSupported = true +} + +// SetClientRandom sets client random explicitly. +// BuildHandshakeFirst() must be called before SetClientRandom. +// r must to be 32 bytes long. +func (uconn *UConn) SetClientRandom(r []byte) error { + if len(r) != 32 { + return errors.New("Incorrect client random length! Expected: 32, got: " + strconv.Itoa(len(r))) + } else { + uconn.HandshakeState.Hello.Random = make([]byte, 32) + copy(uconn.HandshakeState.Hello.Random, r) + return nil + } +} + +func (uconn *UConn) SetSNI(sni string) { + hname := hostnameInSNI(sni) + uconn.config.ServerName = hname + for _, ext := range uconn.Extensions { + sniExt, ok := ext.(*SNIExtension) + if ok { + sniExt.ServerName = hname + } + } +} + +// RemoveSNIExtension removes SNI from the list of extensions sent in ClientHello +// It returns an error when used with HelloGolang ClientHelloID +func (uconn *UConn) RemoveSNIExtension() error { + if uconn.ClientHelloID == HelloGolang { + return fmt.Errorf("cannot call RemoveSNIExtension on a UConn with a HelloGolang ClientHelloID") + } + uconn.omitSNIExtension = true + return nil +} + +func (uconn *UConn) removeSNIExtension() { + filteredExts := make([]TLSExtension, 0, len(uconn.Extensions)) + for _, e := range uconn.Extensions { + if _, ok := e.(*SNIExtension); !ok { + filteredExts = append(filteredExts, e) + } + } + uconn.Extensions = filteredExts +} + +// Handshake runs the client handshake using given clientHandshakeState +// Requires hs.hello, and, optionally, hs.session to be set. +func (c *UConn) Handshake() error { + return c.HandshakeContext(context.Background()) +} + +// HandshakeContext runs the client or server handshake +// protocol if it has not yet been run. +// +// The provided Context must be non-nil. If the context is canceled before +// the handshake is complete, the handshake is interrupted and an error is returned. +// Once the handshake has completed, cancellation of the context will not affect the +// connection. +func (c *UConn) HandshakeContext(ctx context.Context) error { + // Delegate to unexported method for named return + // without confusing documented signature. + return c.handshakeContext(ctx) +} + +func (c *UConn) handshakeContext(ctx context.Context) (ret error) { + // Fast sync/atomic-based exit if there is no handshake in flight and the + // last one succeeded without an error. Avoids the expensive context setup + // and mutex for most Read and Write calls. + if c.isHandshakeComplete.Load() { + return nil + } + + handshakeCtx, cancel := context.WithCancel(ctx) + // Note: defer this before starting the "interrupter" goroutine + // so that we can tell the difference between the input being canceled and + // this cancellation. In the former case, we need to close the connection. + defer cancel() + + // Start the "interrupter" goroutine, if this context might be canceled. + // (The background context cannot). + // + // The interrupter goroutine waits for the input context to be done and + // closes the connection if this happens before the function returns. + if c.quic != nil { + c.quic.cancelc = handshakeCtx.Done() + c.quic.cancel = cancel + } else if ctx.Done() != nil { + done := make(chan struct{}) + interruptRes := make(chan error, 1) + defer func() { + close(done) + if ctxErr := <-interruptRes; ctxErr != nil { + // Return context error to user. + ret = ctxErr + } + }() + go func() { + select { + case <-handshakeCtx.Done(): + // Close the connection, discarding the error + _ = c.conn.Close() + interruptRes <- handshakeCtx.Err() + case <-done: + interruptRes <- nil + } + }() + } + + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + + if err := c.handshakeErr; err != nil { + return err + } + if c.isHandshakeComplete.Load() { + return nil + } + + c.in.Lock() + defer c.in.Unlock() + + // [uTLS section begins] + if c.isClient { + err := c.BuildHandshakeState() + if err != nil { + return err + } + } + // [uTLS section ends] + c.handshakeErr = c.handshakeFn(handshakeCtx) + if c.handshakeErr == nil { + c.handshakes++ + } else { + // If an error occurred during the hadshake try to flush the + // alert that might be left in the buffer. + c.flush() + } + + if c.handshakeErr == nil && !c.isHandshakeComplete.Load() { + c.handshakeErr = errors.New("tls: internal error: handshake should have had a result") + } + if c.handshakeErr != nil && c.isHandshakeComplete.Load() { + panic("tls: internal error: handshake returned an error but is marked successful") + } + + if c.quic != nil { + if c.handshakeErr == nil { + c.quicHandshakeComplete() + // Provide the 1-RTT read secret now that the handshake is complete. + // The QUIC layer MUST NOT decrypt 1-RTT packets prior to completing + // the handshake (RFC 9001, Section 5.7). + c.quicSetReadSecret(QUICEncryptionLevelApplication, c.cipherSuite, c.in.trafficSecret) + } else { + var a alert + c.out.Lock() + if !errors.As(c.out.err, &a) { + a = alertInternalError + } + c.out.Unlock() + // Return an error which wraps both the handshake error and + // any alert error we may have sent, or alertInternalError + // if we didn't send an alert. + // Truncate the text of the alert to 0 characters. + c.handshakeErr = fmt.Errorf("%w%.0w", c.handshakeErr, AlertError(a)) + } + close(c.quic.blockedc) + close(c.quic.signalc) + } + + return c.handshakeErr +} + +// Copy-pasted from tls.Conn in its entirety. But c.Handshake() is now utls' one, not tls. +// Write writes data to the connection. +func (c *UConn) Write(b []byte) (int, error) { + // interlock with Close below + for { + x := c.activeCall.Load() + if x&1 != 0 { + return 0, net.ErrClosed + } + if c.activeCall.CompareAndSwap(x, x+2) { + defer c.activeCall.Add(-2) + break + } + } + + if err := c.Handshake(); err != nil { + return 0, err + } + + c.out.Lock() + defer c.out.Unlock() + + if err := c.out.err; err != nil { + return 0, err + } + + if !c.isHandshakeComplete.Load() { + return 0, alertInternalError + } + + if c.closeNotifySent { + return 0, errShutdown + } + + // SSL 3.0 and TLS 1.0 are susceptible to a chosen-plaintext + // attack when using block mode ciphers due to predictable IVs. + // This can be prevented by splitting each Application Data + // record into two records, effectively randomizing the IV. + // + // https://www.openssl.org/~bodo/tls-cbc.txt + // https://bugzilla.mozilla.org/show_bug.cgi?id=665814 + // https://www.imperialviolet.org/2012/01/15/beastfollowup.html + + var m int + if len(b) > 1 && c.vers <= VersionTLS10 { + if _, ok := c.out.cipher.(cipher.BlockMode); ok { + n, err := c.writeRecordLocked(recordTypeApplicationData, b[:1]) + if err != nil { + return n, c.out.setErrorLocked(err) + } + m, b = 1, b[1:] + } + } + + n, err := c.writeRecordLocked(recordTypeApplicationData, b) + return n + m, c.out.setErrorLocked(err) +} + +func (uconn *UConn) ApplyConfig() error { + for _, ext := range uconn.Extensions { + err := ext.writeToUConn(uconn) + if err != nil { + return err + } + } + return nil +} + +func (uconn *UConn) extensionsList() []uint16 { + + outerExts := []uint16{} + for _, ext := range uconn.Extensions { + buffer := cryptobyte.String(make([]byte, 2000)) + ext.Read(buffer) + var extension uint16 + buffer.ReadUint16(&extension) + outerExts = append(outerExts, extension) + } + return outerExts +} + +func (uconn *UConn) computeAndUpdateOuterECHExtension(inner *clientHelloMsg, ech *echClientContext, useKey bool) error { + // This function is mostly copied from + // https://github.com/enetx/utls/blob/e430876b1d82fdf582efc57f3992d448e7ab3d8a/ech.go#L408 + var encapKey []byte + if useKey { + encapKey = ech.encapsulatedKey + } + + encodedInner, err := encodeInnerClientHelloReorderOuterExts(inner, int(ech.config.MaxNameLength), uconn.extensionsList()) + if err != nil { + return err + } + + encryptedLen := len(encodedInner) + 16 + outerECHExt, err := generateOuterECHExt(ech.config.ConfigID, ech.kdfID, ech.aeadID, encapKey, make([]byte, encryptedLen)) + if err != nil { + return err + } + + echExtIdx := slices.IndexFunc(uconn.Extensions, func(ext TLSExtension) bool { + _, ok := ext.(EncryptedClientHelloExtension) + return ok + }) + if echExtIdx < 0 { + return fmt.Errorf("extension satisfying EncryptedClientHelloExtension not present") + } + oldExt := uconn.Extensions[echExtIdx] + + uconn.Extensions[echExtIdx] = &GenericExtension{ + Id: extensionEncryptedClientHello, + Data: outerECHExt, + } + + if err := uconn.MarshalClientHelloNoECH(); err != nil { + return err + } + + serializedOuter := uconn.HandshakeState.Hello.Raw + serializedOuter = serializedOuter[4:] + encryptedInner, err := ech.hpkeContext.Seal(serializedOuter, encodedInner) + if err != nil { + return err + } + outerECHExt, err = generateOuterECHExt(ech.config.ConfigID, ech.kdfID, ech.aeadID, encapKey, encryptedInner) + if err != nil { + return err + } + uconn.Extensions[echExtIdx] = &GenericExtension{ + Id: extensionEncryptedClientHello, + Data: outerECHExt, + } + + if err := uconn.MarshalClientHelloNoECH(); err != nil { + return err + } + + uconn.Extensions[echExtIdx] = oldExt + return nil + +} + +func (uconn *UConn) MarshalClientHello() error { + if len(uconn.config.EncryptedClientHelloConfigList) > 0 { + inner, _, ech, err := uconn.makeClientHello() + if err != nil { + return err + } + + // copy compressed extensions to the ClientHelloInner + inner.keyShares = KeyShares(uconn.HandshakeState.Hello.KeyShares).ToPrivate() + inner.supportedSignatureAlgorithms = uconn.HandshakeState.Hello.SupportedSignatureAlgorithms + inner.sessionId = uconn.HandshakeState.Hello.SessionId + inner.supportedCurves = uconn.HandshakeState.Hello.SupportedCurves + + ech.innerHello = inner + + uconn.computeAndUpdateOuterECHExtension(inner, ech, true) + + uconn.echCtx = ech + return nil + } + + if err := uconn.MarshalClientHelloNoECH(); err != nil { + return err + } + + return nil + +} + +// MarshalClientHelloNoECH marshals ClientHello as if there was no +// ECH extension present. +func (uconn *UConn) MarshalClientHelloNoECH() error { + hello := uconn.HandshakeState.Hello + headerLength := 2 + 32 + 1 + len(hello.SessionId) + + 2 + len(hello.CipherSuites)*2 + + 1 + len(hello.CompressionMethods) + + extensionsLen := 0 + var paddingExt *UtlsPaddingExtension // reference to padding extension, if present + for _, ext := range uconn.Extensions { + if pe, ok := ext.(*UtlsPaddingExtension); !ok { + // If not padding - just add length of extension to total length + extensionsLen += ext.Len() + } else { + // If padding - process it later + if paddingExt == nil { + paddingExt = pe + } else { + return errors.New("multiple padding extensions") + } + } + } + + if paddingExt != nil { + // determine padding extension presence and length + paddingExt.Update(headerLength + 4 + extensionsLen + 2) + extensionsLen += paddingExt.Len() + } + + helloLen := headerLength + if len(uconn.Extensions) > 0 { + helloLen += 2 + extensionsLen // 2 bytes for extensions' length + } + + helloBuffer := bytes.Buffer{} + bufferedWriter := bufio.NewWriterSize(&helloBuffer, helloLen+4) // 1 byte for tls record type, 3 for length + // We use buffered Writer to avoid checking write errors after every Write(): whenever first error happens + // Write() will become noop, and error will be accessible via Flush(), which is called once in the end + + binary.Write(bufferedWriter, binary.BigEndian, typeClientHello) + helloLenBytes := []byte{byte(helloLen >> 16), byte(helloLen >> 8), byte(helloLen)} // poor man's uint24 + binary.Write(bufferedWriter, binary.BigEndian, helloLenBytes) + binary.Write(bufferedWriter, binary.BigEndian, hello.Vers) + + binary.Write(bufferedWriter, binary.BigEndian, hello.Random) + + binary.Write(bufferedWriter, binary.BigEndian, uint8(len(hello.SessionId))) + binary.Write(bufferedWriter, binary.BigEndian, hello.SessionId) + + binary.Write(bufferedWriter, binary.BigEndian, uint16(len(hello.CipherSuites)<<1)) + for _, suite := range hello.CipherSuites { + binary.Write(bufferedWriter, binary.BigEndian, suite) + } + + binary.Write(bufferedWriter, binary.BigEndian, uint8(len(hello.CompressionMethods))) + binary.Write(bufferedWriter, binary.BigEndian, hello.CompressionMethods) + + if len(uconn.Extensions) > 0 { + binary.Write(bufferedWriter, binary.BigEndian, uint16(extensionsLen)) + for _, ext := range uconn.Extensions { + if _, err := bufferedWriter.ReadFrom(ext); err != nil { + return err + } + } + } + + err := bufferedWriter.Flush() + if err != nil { + return err + } + + if helloBuffer.Len() != 4+helloLen { + return errors.New("utls: unexpected ClientHello length. Expected: " + strconv.Itoa(4+helloLen) + + ". Got: " + strconv.Itoa(helloBuffer.Len())) + } + + hello.Raw = helloBuffer.Bytes() + return nil +} + +// get current state of cipher and encrypt zeros to get keystream +func (uconn *UConn) GetOutKeystream(length int) ([]byte, error) { + zeros := make([]byte, length) + + if outCipher, ok := uconn.out.cipher.(cipher.AEAD); ok { + // AEAD.Seal() does not mutate internal state, other ciphers might + return outCipher.Seal(nil, uconn.out.seq[:], zeros, nil), nil + } + return nil, errors.New("could not convert OutCipher to cipher.AEAD") +} + +// SetTLSVers sets min and max TLS version in all appropriate places. +// Function will use first non-zero version parsed in following order: +// 1. Provided minTLSVers, maxTLSVers +// 2. specExtensions may have SupportedVersionsExtension +// 3. [default] min = TLS 1.0, max = TLS 1.2 +// +// Error is only returned if things are in clearly undesirable state +// to help user fix them. +func (uconn *UConn) SetTLSVers(minTLSVers, maxTLSVers uint16, specExtensions []TLSExtension) error { + if minTLSVers == 0 && maxTLSVers == 0 { + // if version is not set explicitly in the ClientHelloSpec, check the SupportedVersions extension + supportedVersionsExtensionsPresent := 0 + for _, e := range specExtensions { + switch ext := e.(type) { + case *SupportedVersionsExtension: + findVersionsInSupportedVersionsExtensions := func(versions []uint16) (uint16, uint16) { + // returns (minVers, maxVers) + minVers := uint16(0) + maxVers := uint16(0) + for _, vers := range versions { + if isGREASEUint16(vers) { + continue + } + if maxVers < vers || maxVers == 0 { + maxVers = vers + } + if minVers > vers || minVers == 0 { + minVers = vers + } + } + return minVers, maxVers + } + + supportedVersionsExtensionsPresent += 1 + minTLSVers, maxTLSVers = findVersionsInSupportedVersionsExtensions(ext.Versions) + if minTLSVers == 0 && maxTLSVers == 0 { + return fmt.Errorf("SupportedVersions extension has invalid Versions field") + } // else: proceed + } + } + switch supportedVersionsExtensionsPresent { + case 0: + // if mandatory for TLS 1.3 extension is not present, just default to 1.2 + minTLSVers = VersionTLS10 + maxTLSVers = VersionTLS12 + case 1: + default: + return fmt.Errorf("uconn.Extensions contains %v separate SupportedVersions extensions", + supportedVersionsExtensionsPresent) + } + } + + if minTLSVers < VersionTLS10 || minTLSVers > VersionTLS13 { + return fmt.Errorf("uTLS does not support 0x%X as min version", minTLSVers) + } + + if maxTLSVers < VersionTLS10 || maxTLSVers > VersionTLS13 { + return fmt.Errorf("uTLS does not support 0x%X as max version", maxTLSVers) + } + + uconn.HandshakeState.Hello.SupportedVersions = makeSupportedVersions(minTLSVers, maxTLSVers) + if uconn.config.EncryptedClientHelloConfigList == nil { + uconn.config.MinVersion = minTLSVers + uconn.config.MaxVersion = maxTLSVers + } + + return nil +} + +func (uconn *UConn) SetUnderlyingConn(c net.Conn) { + uconn.Conn.conn = c +} + +func (uconn *UConn) GetUnderlyingConn() net.Conn { + return uconn.Conn.conn +} + +// MakeConnWithCompleteHandshake allows to forge both server and client side TLS connections. +// Major Hack Alert. +func MakeConnWithCompleteHandshake(tcpConn net.Conn, version uint16, cipherSuite uint16, masterSecret []byte, clientRandom []byte, serverRandom []byte, isClient bool) *Conn { + tlsConn := &Conn{conn: tcpConn, config: &Config{}, isClient: isClient} + cs := cipherSuiteByID(cipherSuite) + if cs != nil { + // This is mostly borrowed from establishKeys() + clientMAC, serverMAC, clientKey, serverKey, clientIV, serverIV := + keysFromMasterSecret(version, cs, masterSecret, clientRandom, serverRandom, + cs.macLen, cs.keyLen, cs.ivLen) + + var clientCipher, serverCipher interface{} + var clientHash, serverHash hash.Hash + if cs.cipher != nil { + clientCipher = cs.cipher(clientKey, clientIV, true /* for reading */) + clientHash = cs.mac(clientMAC) + serverCipher = cs.cipher(serverKey, serverIV, false /* not for reading */) + serverHash = cs.mac(serverMAC) + } else { + clientCipher = cs.aead(clientKey, clientIV) + serverCipher = cs.aead(serverKey, serverIV) + } + + if isClient { + tlsConn.in.prepareCipherSpec(version, serverCipher, serverHash) + tlsConn.out.prepareCipherSpec(version, clientCipher, clientHash) + } else { + tlsConn.in.prepareCipherSpec(version, clientCipher, clientHash) + tlsConn.out.prepareCipherSpec(version, serverCipher, serverHash) + } + + // skip the handshake states + tlsConn.isHandshakeComplete.Store(true) + tlsConn.cipherSuite = cipherSuite + tlsConn.haveVers = true + tlsConn.vers = version + + // Update to the new cipher specs + // and consume the finished messages + tlsConn.in.changeCipherSpec() + tlsConn.out.changeCipherSpec() + + tlsConn.in.incSeq() + tlsConn.out.incSeq() + + return tlsConn + } else { + // TODO: Support TLS 1.3 Cipher Suites + return nil + } +} + +func makeSupportedVersions(minVers, maxVers uint16) []uint16 { + a := make([]uint16, maxVers-minVers+1) + for i := range a { + a[i] = maxVers - uint16(i) + } + return a +} + +// Extending (*Conn).readHandshake() to support more customized handshake messages. +func (c *Conn) utlsHandshakeMessageType(msgType byte) (handshakeMessage, error) { + switch msgType { + case utlsTypeCompressedCertificate: + return new(utlsCompressedCertificateMsg), nil + case utlsTypeEncryptedExtensions: + if c.isClient { + return new(encryptedExtensionsMsg), nil + } else { + return new(utlsClientEncryptedExtensionsMsg), nil + } + default: + return nil, c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } +} + +// Extending (*Conn).connectionStateLocked() +func (c *Conn) utlsConnectionStateLocked(state *ConnectionState) { + state.PeerApplicationSettings = c.utls.peerApplicationSettings +} + +type utlsConnExtraFields struct { + // Application Settings (ALPS) + peerApplicationSettings []byte + localApplicationSettings []byte + applicationSettingsCodepoint uint16 + + sessionController *sessionController +} + +// Read reads data from the connection. +// +// As Read calls [Conn.Handshake], in order to prevent indefinite blocking a deadline +// must be set for both Read and [Conn.Write] before Read is called when the handshake +// has not yet completed. See [Conn.SetDeadline], [Conn.SetReadDeadline], and +// [Conn.SetWriteDeadline]. +func (c *UConn) Read(b []byte) (int, error) { + if err := c.Handshake(); err != nil { + return 0, err + } + if len(b) == 0 { + // Put this after Handshake, in case people were calling + // Read(nil) for the side effect of the Handshake. + return 0, nil + } + + c.in.Lock() + defer c.in.Unlock() + + for c.input.Len() == 0 { + if err := c.readRecord(); err != nil { + return 0, err + } + for c.hand.Len() > 0 { + if err := c.handlePostHandshakeMessage(); err != nil { + return 0, err + } + } + } + + n, _ := c.input.Read(b) + + // If a close-notify alert is waiting, read it so that we can return (n, + // EOF) instead of (n, nil), to signal to the HTTP response reading + // goroutine that the connection is now closed. This eliminates a race + // where the HTTP response reading goroutine would otherwise not observe + // the EOF until its next read, by which time a client goroutine might + // have already tried to reuse the HTTP connection for a new request. + // See https://golang.org/cl/76400046 and https://golang.org/issue/3514 + if n != 0 && c.input.Len() == 0 && c.rawInput.Len() > 0 && + recordType(c.rawInput.Bytes()[0]) == recordTypeAlert { + if err := c.readRecord(); err != nil { + return n, err // will be io.EOF on closeNotify + } + } + + return n, nil +} + +// handleRenegotiation processes a HelloRequest handshake message. +func (c *UConn) handleRenegotiation() error { + if c.vers == VersionTLS13 { + return errors.New("tls: internal error: unexpected renegotiation") + } + + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + + helloReq, ok := msg.(*helloRequestMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(helloReq, msg) + } + + if !c.isClient { + return c.sendAlert(alertNoRenegotiation) + } + + switch c.config.Renegotiation { + case RenegotiateNever: + return c.sendAlert(alertNoRenegotiation) + case RenegotiateOnceAsClient: + if c.handshakes > 1 { + return c.sendAlert(alertNoRenegotiation) + } + case RenegotiateFreelyAsClient: + // Ok. + default: + c.sendAlert(alertInternalError) + return errors.New("tls: unknown Renegotiation value") + } + + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + + c.isHandshakeComplete.Store(false) + + // [uTLS section begins] + if err = c.BuildHandshakeState(); err != nil { + return err + } + // [uTLS section ends] + if c.handshakeErr = c.clientHandshake(context.Background()); c.handshakeErr == nil { + c.handshakes++ + } + return c.handshakeErr +} + +// handlePostHandshakeMessage processes a handshake message arrived after the +// handshake is complete. Up to TLS 1.2, it indicates the start of a renegotiation. +func (c *UConn) handlePostHandshakeMessage() error { + if c.vers != VersionTLS13 { + return c.handleRenegotiation() + } + + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + c.retryCount++ + if c.retryCount > maxUselessRecords { + c.sendAlert(alertUnexpectedMessage) + return c.in.setErrorLocked(errors.New("tls: too many non-advancing records")) + } + + switch msg := msg.(type) { + case *newSessionTicketMsgTLS13: + return c.handleNewSessionTicket(msg) + case *keyUpdateMsg: + return c.handleKeyUpdate(msg) + } + // The QUIC layer is supposed to treat an unexpected post-handshake CertificateRequest + // as a QUIC-level PROTOCOL_VIOLATION error (RFC 9001, Section 4.4). Returning an + // unexpected_message alert here doesn't provide it with enough information to distinguish + // this condition from other unexpected messages. This is probably fine. + c.sendAlert(alertUnexpectedMessage) + return fmt.Errorf("tls: received unexpected handshake message of type %T", msg) +} diff --git a/backend/vendor/github.com/enetx/utls/u_ech.go b/backend/vendor/github.com/enetx/utls/u_ech.go new file mode 100644 index 0000000..ec424b9 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_ech.go @@ -0,0 +1,306 @@ +package tls + +import ( + "crypto/rand" + "errors" + "fmt" + "io" + "math/big" + "sync" + + "github.com/enetx/utls/dicttls" + "github.com/enetx/utls/internal/hpke" + "golang.org/x/crypto/cryptobyte" +) + +// Unstable API: This is a work in progress and may change in the future. Using +// it in your application may cause your application to break when updating to +// a new version of uTLS. + +const ( + OuterClientHello byte = 0x00 + InnerClientHello byte = 0x01 +) + +type EncryptedClientHelloExtension interface { + // TLSExtension must be implemented by all EncryptedClientHelloExtension implementations. + TLSExtension + + // MarshalClientHello is called by (*UConn).MarshalClientHello() when an ECH extension + // is present to allow the ECH extension to take control of the generation of the + // entire ClientHello message. + MarshalClientHello(*UConn) error + + mustEmbedUnimplementedECHExtension() +} + +type ECHExtension = EncryptedClientHelloExtension // alias + +// type guard: GREASEEncryptedClientHelloExtension must implement EncryptedClientHelloExtension +var ( + _ EncryptedClientHelloExtension = (*GREASEEncryptedClientHelloExtension)(nil) + + _ EncryptedClientHelloExtension = (*UnimplementedECHExtension)(nil) +) + +type GREASEEncryptedClientHelloExtension struct { + CandidateCipherSuites []HPKESymmetricCipherSuite + cipherSuite HPKESymmetricCipherSuite // randomly picked from CandidateCipherSuites or generated if empty + CandidateConfigIds []uint8 + configId uint8 // randomly picked from CandidateConfigIds or generated if empty + EncapsulatedKey []byte // if empty, will generate random bytes + CandidatePayloadLens []uint16 // Pre-encryption. If 0, will pick 128(+16=144) + payload []byte // payload should be calculated ONCE and stored here, HRR will reuse this + + initOnce sync.Once + + UnimplementedECHExtension +} + +type GREASEECHExtension = GREASEEncryptedClientHelloExtension // alias + +// init initializes the GREASEEncryptedClientHelloExtension with random values if they are not set. +// +// Based on cloudflare/go's echGenerateGreaseExt() +func (g *GREASEEncryptedClientHelloExtension) init() error { + var initErr error + g.initOnce.Do(func() { + // Set the config_id field to a random byte. + // + // Note: must not reuse this extension unless for HRR. It is required + // to generate new random bytes for config_id for each new ClientHello, + // but reuse the same config_id for HRR. + if len(g.CandidateConfigIds) == 0 { + var b []byte = make([]byte, 1) + _, err := rand.Read(b[:]) + if err != nil { + initErr = fmt.Errorf("error generating random byte for config_id: %w", err) + return + } + g.configId = b[0] + } else { + // randomly pick one from the list + rndIndex, err := rand.Int(rand.Reader, big.NewInt(int64(len(g.CandidateConfigIds)))) + if err != nil { + initErr = fmt.Errorf("error generating random index for config_id: %w", err) + return + } + g.configId = g.CandidateConfigIds[rndIndex.Int64()] + } + + // Set the cipher_suite field to a supported HpkeSymmetricCipherSuite. + // The selection SHOULD vary to exercise all supported configurations, + // but MAY be held constant for successive connections to the same server + // in the same session. + if len(g.CandidateCipherSuites) == 0 { + g.cipherSuite = HPKESymmetricCipherSuite{uint16(defaultHpkeKdf), uint16(defaultHpkeAead)} + } else { + // randomly pick one from the list + rndIndex, err := rand.Int(rand.Reader, big.NewInt(int64(len(g.CandidateCipherSuites)))) + if err != nil { + initErr = fmt.Errorf("error generating random index for cipher_suite: %w", err) + return + } + g.cipherSuite = HPKESymmetricCipherSuite{ + g.CandidateCipherSuites[rndIndex.Int64()].KdfId, + g.CandidateCipherSuites[rndIndex.Int64()].AeadId, + } + // aead = hpke.AEAD(g.cipherSuite.AeadId) + } + + if len(g.EncapsulatedKey) == 0 { + kem := uint16(defaultHpkeKem) + + echPK, err := hpke.ParseHPKEPublicKey(uint16(kem), dummyX25519PublicKey) + if err != nil { + initErr = fmt.Errorf("tls: grease ech: failed to parse dummy public key: %w", err) + return + } + suite := echCipher{ + KDFID: defaultHpkeKdf, + AEADID: defaultHpkeAead, + } + g.EncapsulatedKey, _, err = hpke.SetupSender(kem, suite.KDFID, suite.AEADID, echPK, []byte{}) + if err != nil { + initErr = fmt.Errorf("tls: grease ech: failed to setup encapsulated key: %w", err) + return + } + } + + if len(g.payload) == 0 { + if len(g.CandidatePayloadLens) == 0 { + g.CandidatePayloadLens = []uint16{128} + } + + // randomly pick one from the list + rndIndex, err := rand.Int(rand.Reader, big.NewInt(int64(len(g.CandidatePayloadLens)))) + if err != nil { + initErr = fmt.Errorf("error generating random index for payload length: %w", err) + return + } + + initErr = g.randomizePayload(g.CandidatePayloadLens[rndIndex.Int64()]) + } + }) + + return initErr +} + +func (g *GREASEEncryptedClientHelloExtension) randomizePayload(encodedHelloInnerLen uint16) error { + if len(g.payload) != 0 { + return errors.New("tls: grease ech: regenerating payload is forbidden") + } + + g.payload = make([]byte, cipherLen(g.cipherSuite.AeadId, int(encodedHelloInnerLen))) + _, err := rand.Read(g.payload) + if err != nil { + return fmt.Errorf("tls: generating grease ech payload: %w", err) + } + return nil +} + +// writeToUConn implements TLSExtension. +// +// For ECH extensions, writeToUConn simply points the ech field in UConn to the extension. +func (g *GREASEEncryptedClientHelloExtension) writeToUConn(uconn *UConn) error { + uconn.ech = g + return uconn.MarshalClientHelloNoECH() +} + +// Len implements TLSExtension. +func (g *GREASEEncryptedClientHelloExtension) Len() int { + g.init() + return 2 + 2 + 1 /* ClientHello Type */ + 4 /* CipherSuite */ + 1 /* Config ID */ + 2 + len(g.EncapsulatedKey) + 2 + len(g.payload) +} + +// Read implements TLSExtension. +func (g *GREASEEncryptedClientHelloExtension) Read(b []byte) (int, error) { + if len(b) < g.Len() { + return 0, io.ErrShortBuffer + } + + b[0] = byte(utlsExtensionECH >> 8) + b[1] = byte(utlsExtensionECH & 0xFF) + b[2] = byte((g.Len() - 4) >> 8) + b[3] = byte((g.Len() - 4) & 0xFF) + b[4] = OuterClientHello + b[5] = byte(g.cipherSuite.KdfId >> 8) + b[6] = byte(g.cipherSuite.KdfId & 0xFF) + b[7] = byte(g.cipherSuite.AeadId >> 8) + b[8] = byte(g.cipherSuite.AeadId & 0xFF) + b[9] = g.configId + b[10] = byte(len(g.EncapsulatedKey) >> 8) + b[11] = byte(len(g.EncapsulatedKey) & 0xFF) + copy(b[12:], g.EncapsulatedKey) + b[12+len(g.EncapsulatedKey)] = byte(len(g.payload) >> 8) + b[12+len(g.EncapsulatedKey)+1] = byte(len(g.payload) & 0xFF) + copy(b[12+len(g.EncapsulatedKey)+2:], g.payload) + + return g.Len(), io.EOF +} + +// MarshalClientHello implements EncryptedClientHelloExtension. +func (*GREASEEncryptedClientHelloExtension) MarshalClientHello(*UConn) error { + return errors.New("tls: grease ech: MarshalClientHello() is not implemented, use (*UConn).MarshalClientHello() instead") +} + +// Write implements TLSExtensionWriter. +func (g *GREASEEncryptedClientHelloExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + + // Check the extension type, it must be OuterClientHello otherwise we are not + // parsing the correct extension + var chType uint8 // 0: outer, 1: inner + var ignored cryptobyte.String + if !extData.ReadUint8(&chType) || chType != 0 { + return fullLen, errors.New("bad Client Hello type, expected 0, got " + fmt.Sprintf("%d", chType)) + } + + // Parse the cipher suite + if !extData.ReadUint16(&g.cipherSuite.KdfId) || !extData.ReadUint16(&g.cipherSuite.AeadId) { + return fullLen, errors.New("bad cipher suite") + } + if g.cipherSuite.KdfId != dicttls.HKDF_SHA256 && + g.cipherSuite.KdfId != dicttls.HKDF_SHA384 && + g.cipherSuite.KdfId != dicttls.HKDF_SHA512 { + return fullLen, errors.New("bad KDF ID: " + fmt.Sprintf("%d", g.cipherSuite.KdfId)) + } + if g.cipherSuite.AeadId != dicttls.AEAD_AES_128_GCM && + g.cipherSuite.AeadId != dicttls.AEAD_AES_256_GCM && + g.cipherSuite.AeadId != dicttls.AEAD_CHACHA20_POLY1305 { + return fullLen, errors.New("bad AEAD ID: " + fmt.Sprintf("%d", g.cipherSuite.AeadId)) + } + g.CandidateCipherSuites = []HPKESymmetricCipherSuite{g.cipherSuite} + + // GREASE the ConfigId + if !extData.ReadUint8(&g.configId) { + return fullLen, errors.New("bad config ID") + } + // we don't write to CandidateConfigIds because we don't really want to reuse the same config_id + + // GREASE the EncapsulatedKey + if !extData.ReadUint16LengthPrefixed(&ignored) { + return fullLen, errors.New("bad encapsulated key") + } + g.EncapsulatedKey = make([]byte, len(ignored)) + n, err := rand.Read(g.EncapsulatedKey) + if err != nil { + return fullLen, fmt.Errorf("tls: generating grease ech encapsulated key: %w", err) + } + if n != len(g.EncapsulatedKey) { + return fullLen, fmt.Errorf("tls: generating grease ech encapsulated key: short read for %d bytes", len(ignored)-n) + } + + // GREASE the payload + if !extData.ReadUint16LengthPrefixed(&ignored) { + return fullLen, errors.New("bad payload") + } + g.CandidatePayloadLens = []uint16{uint16(len(ignored) - cipherLen(g.cipherSuite.AeadId, 0))} + + return fullLen, nil +} + +// UnimplementedECHExtension is a placeholder for an ECH extension that is not implemented. +// All implementations of EncryptedClientHelloExtension should embed this struct to ensure +// forward compatibility. +type UnimplementedECHExtension struct{} + +// writeToUConn implements TLSExtension. +func (*UnimplementedECHExtension) writeToUConn(_ *UConn) error { + return errors.New("tls: unimplemented ECHExtension") +} + +// Len implements TLSExtension. +func (*UnimplementedECHExtension) Len() int { + return 0 +} + +// Read implements TLSExtension. +func (*UnimplementedECHExtension) Read(_ []byte) (int, error) { + return 0, errors.New("tls: unimplemented ECHExtension") +} + +// MarshalClientHello implements EncryptedClientHelloExtension. +func (*UnimplementedECHExtension) MarshalClientHello(*UConn) error { + return errors.New("tls: unimplemented ECHExtension") +} + +// mustEmbedUnimplementedECHExtension is a noop function but is required to +// ensure forward compatibility. +func (*UnimplementedECHExtension) mustEmbedUnimplementedECHExtension() { + panic("mustEmbedUnimplementedECHExtension() is not implemented") +} + +// BoringGREASEECH returns a GREASE scheme BoringSSL uses by default. +func BoringGREASEECH() *GREASEEncryptedClientHelloExtension { + return &GREASEEncryptedClientHelloExtension{ + CandidateCipherSuites: []HPKESymmetricCipherSuite{ + { + KdfId: dicttls.HKDF_SHA256, + AeadId: dicttls.AEAD_AES_128_GCM, + }, + }, + CandidatePayloadLens: []uint16{128, 160, 192, 224}, // +16: 144, 176, 208, 240 + } +} diff --git a/backend/vendor/github.com/enetx/utls/u_fingerprinter.go b/backend/vendor/github.com/enetx/utls/u_fingerprinter.go new file mode 100644 index 0000000..61afc73 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_fingerprinter.go @@ -0,0 +1,74 @@ +// Copyright 2017 Google Inc. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +// Fingerprinter is a struct largely for holding options for the FingerprintClientHello func +type Fingerprinter struct { + // AllowBluntMimicry will ensure that unknown extensions are + // passed along into the resulting ClientHelloSpec as-is + // WARNING: there could be numerous subtle issues with ClientHelloSpecs + // that are generated with this flag which could compromise security and/or mimicry + AllowBluntMimicry bool + // AlwaysAddPadding will always add a UtlsPaddingExtension with BoringPaddingStyle + // at the end of the extensions list if it isn't found in the fingerprinted hello. + // This could be useful in scenarios where the hello you are fingerprinting does not + // have any padding, but you suspect that other changes you make to the final hello + // (including things like different SNI lengths) would cause padding to be necessary + AlwaysAddPadding bool + + RealPSKResumption bool // if set, PSK extension (if any) will be real PSK extension, otherwise it will be fake PSK extension +} + +// FingerprintClientHello returns a ClientHelloSpec which is based on the +// ClientHello that is passed in as the data argument +// +// If the ClientHello passed in has extensions that are not recognized or cannot be handled +// it will return a non-nil error and a nil *ClientHelloSpec value +// +// The data should be the full tls record, including the record type/version/length header +// as well as the handshake type/length/version header +// https://tools.ietf.org/html/rfc5246#section-6.2 +// https://tools.ietf.org/html/rfc5246#section-7.4 +// +// It calls UnmarshalClientHello internally, and is kept for backwards compatibility +func (f *Fingerprinter) FingerprintClientHello(data []byte) (clientHelloSpec *ClientHelloSpec, err error) { + return f.RawClientHello(data) +} + +// RawClientHello returns a ClientHelloSpec which is based on the +// ClientHello raw bytes that is passed in as the raw argument. +// +// It was renamed from FingerprintClientHello in v1.3.1 and earlier versions +// as a more precise name for the function +func (f *Fingerprinter) RawClientHello(raw []byte) (clientHelloSpec *ClientHelloSpec, err error) { + clientHelloSpec = &ClientHelloSpec{} + + err = clientHelloSpec.FromRaw(raw, f.AllowBluntMimicry, f.RealPSKResumption) + if err != nil { + return nil, err + } + + if f.AlwaysAddPadding { + clientHelloSpec.AlwaysAddPadding() + } + + return clientHelloSpec, nil +} + +// UnmarshalJSONClientHello returns a ClientHelloSpec which is based on the +// ClientHello JSON bytes that is passed in as the json argument. +func (f *Fingerprinter) UnmarshalJSONClientHello(json []byte) (clientHelloSpec *ClientHelloSpec, err error) { + clientHelloSpec = &ClientHelloSpec{} + err = clientHelloSpec.UnmarshalJSON(json) + if err != nil { + return nil, err + } + + if f.AlwaysAddPadding { + clientHelloSpec.AlwaysAddPadding() + } + + return clientHelloSpec, nil +} diff --git a/backend/vendor/github.com/enetx/utls/u_handshake_client.go b/backend/vendor/github.com/enetx/utls/u_handshake_client.go new file mode 100644 index 0000000..e363357 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_handshake_client.go @@ -0,0 +1,595 @@ +// Copyright 2022 uTLS Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bytes" + "compress/zlib" + "context" + "errors" + "fmt" + "io" + + "github.com/andybalholm/brotli" + "github.com/klauspost/compress/zstd" + "github.com/enetx/utls/internal/fips140tls" + "github.com/enetx/utls/internal/hpke" + "github.com/enetx/utls/internal/tls13" +) + +// This function is called by (*clientHandshakeStateTLS13).readServerCertificate() +// to retrieve the certificate out of a message read by (*Conn).readHandshake() +func (hs *clientHandshakeStateTLS13) utlsReadServerCertificate(msg any) (processedMsg any, err error) { + for _, ext := range hs.uconn.Extensions { + switch ext.(type) { + case *UtlsCompressCertExtension: + // Included Compressed Certificate extension + if len(hs.uconn.certCompressionAlgs) > 0 { + compressedCertMsg, ok := msg.(*utlsCompressedCertificateMsg) + if ok { + if err = transcriptMsg(compressedCertMsg, hs.transcript); err != nil { + return nil, err + } + msg, err = hs.decompressCert(*compressedCertMsg) + if err != nil { + return nil, fmt.Errorf("tls: failed to decompress certificate message: %w", err) + } else { + return msg, nil + } + } + } + default: + continue + } + } + return nil, nil +} + +// called by (*clientHandshakeStateTLS13).utlsReadServerCertificate() when UtlsCompressCertExtension is used +func (hs *clientHandshakeStateTLS13) decompressCert(m utlsCompressedCertificateMsg) (*certificateMsgTLS13, error) { + var ( + decompressed io.Reader + compressed = bytes.NewReader(m.compressedCertificateMessage) + c = hs.c + ) + + // Check to see if the peer responded with an algorithm we advertised. + supportedAlg := false + for _, alg := range hs.uconn.certCompressionAlgs { + if m.algorithm == uint16(alg) { + supportedAlg = true + } + } + if !supportedAlg { + c.sendAlert(alertBadCertificate) + return nil, fmt.Errorf("unadvertised algorithm (%d)", m.algorithm) + } + + switch CertCompressionAlgo(m.algorithm) { + case CertCompressionBrotli: + decompressed = brotli.NewReader(compressed) + + case CertCompressionZlib: + rc, err := zlib.NewReader(compressed) + if err != nil { + c.sendAlert(alertBadCertificate) + return nil, fmt.Errorf("failed to open zlib reader: %w", err) + } + defer rc.Close() + decompressed = rc + + case CertCompressionZstd: + rc, err := zstd.NewReader(compressed) + if err != nil { + c.sendAlert(alertBadCertificate) + return nil, fmt.Errorf("failed to open zstd reader: %w", err) + } + defer rc.Close() + decompressed = rc + + default: + c.sendAlert(alertBadCertificate) + return nil, fmt.Errorf("unsupported algorithm (%d)", m.algorithm) + } + + rawMsg := make([]byte, m.uncompressedLength+4) // +4 for message type and uint24 length field + rawMsg[0] = typeCertificate + rawMsg[1] = uint8(m.uncompressedLength >> 16) + rawMsg[2] = uint8(m.uncompressedLength >> 8) + rawMsg[3] = uint8(m.uncompressedLength) + + n, err := decompressed.Read(rawMsg[4:]) + if err != nil && !errors.Is(err, io.EOF) { + c.sendAlert(alertBadCertificate) + return nil, err + } + if n < len(rawMsg)-4 { + // If, after decompression, the specified length does not match the actual length, the party + // receiving the invalid message MUST abort the connection with the "bad_certificate" alert. + // https://datatracker.ietf.org/doc/html/rfc8879#section-4 + c.sendAlert(alertBadCertificate) + return nil, fmt.Errorf("decompressed len (%d) does not match specified len (%d)", n, m.uncompressedLength) + } + certMsg := new(certificateMsgTLS13) + if !certMsg.unmarshal(rawMsg) { + return nil, c.sendAlert(alertUnexpectedMessage) + } + return certMsg, nil +} + +// to be called in (*clientHandshakeStateTLS13).handshake(), +// after hs.readServerFinished() and before hs.sendClientCertificate() +func (hs *clientHandshakeStateTLS13) serverFinishedReceived() error { + if err := hs.sendClientEncryptedExtensions(); err != nil { + return err + } + return nil +} + +func (hs *clientHandshakeStateTLS13) sendClientEncryptedExtensions() error { + c := hs.c + clientEncryptedExtensions := new(utlsClientEncryptedExtensionsMsg) + if c.utls.applicationSettingsCodepoint != 0 { + clientEncryptedExtensions.applicationSettingsCodepoint = c.utls.applicationSettingsCodepoint + clientEncryptedExtensions.applicationSettings = c.utls.localApplicationSettings + if _, err := c.writeHandshakeRecord(clientEncryptedExtensions, hs.transcript); err != nil { + return err + } + } + + return nil +} + +func (hs *clientHandshakeStateTLS13) utlsReadServerParameters(encryptedExtensions *encryptedExtensionsMsg) error { + hs.c.utls.peerApplicationSettings = encryptedExtensions.utls.applicationSettings + hs.c.utls.applicationSettingsCodepoint = encryptedExtensions.utls.applicationSettingsCodepoint + + if hs.c.utls.applicationSettingsCodepoint != 0 { + if hs.uconn.vers < VersionTLS13 { + return errors.New("tls: server sent application settings at invalid version") + } + if len(hs.uconn.clientProtocol) == 0 { + return errors.New("tls: server sent application settings without ALPN") + } + + // Check if the ALPN selected by the server exists in the client's list. + if alps, ok := hs.uconn.config.ApplicationSettings[hs.serverHello.alpnProtocol]; ok { + hs.c.utls.localApplicationSettings = alps + } else { + // return errors.New("tls: server selected ALPN doesn't match a client ALPS") + return nil // ignore if client doesn't have ALPS in use. + // TODO: is this a issue or not? + } + } + + return nil +} + +func (c *Conn) makeClientHelloForApplyPreset() (*clientHelloMsg, *keySharePrivateKeys, *echClientContext, error) { + config := c.config + + // [UTLS SECTION START] + if len(config.ServerName) == 0 && !config.InsecureSkipVerify && len(config.InsecureServerNameToVerify) == 0 { + return nil, nil, nil, errors.New("tls: at least one of ServerName, InsecureSkipVerify or InsecureServerNameToVerify must be specified in the tls.Config") + } + // [UTLS SECTION END] + + nextProtosLength := 0 + for _, proto := range config.NextProtos { + if l := len(proto); l == 0 || l > 255 { + return nil, nil, nil, errors.New("tls: invalid NextProtos value") + } else { + nextProtosLength += 1 + l + } + } + if nextProtosLength > 0xffff { + return nil, nil, nil, errors.New("tls: NextProtos values too large") + } + + supportedVersions := config.supportedVersions(roleClient) + if len(supportedVersions) == 0 { + return nil, nil, nil, errors.New("tls: no supported versions satisfy MinVersion and MaxVersion") + } + maxVersion := config.maxSupportedVersion(roleClient) + + hello := &clientHelloMsg{ + vers: maxVersion, + compressionMethods: []uint8{compressionNone}, + random: make([]byte, 32), + extendedMasterSecret: true, + ocspStapling: true, + scts: true, + serverName: hostnameInSNI(config.ServerName), + supportedCurves: config.curvePreferences(maxVersion), + supportedPoints: []uint8{pointFormatUncompressed}, + secureRenegotiationSupported: true, + alpnProtocols: config.NextProtos, + supportedVersions: supportedVersions, + } + + // The version at the beginning of the ClientHello was capped at TLS 1.2 + // for compatibility reasons. The supported_versions extension is used + // to negotiate versions now. See RFC 8446, Section 4.2.1. + if hello.vers > VersionTLS12 { + hello.vers = VersionTLS12 + } + + if c.handshakes > 0 { + hello.secureRenegotiation = c.clientFinished[:] + } + + preferenceOrder := cipherSuitesPreferenceOrder + if !hasAESGCMHardwareSupport { + preferenceOrder = cipherSuitesPreferenceOrderNoAES + } + configCipherSuites := config.cipherSuites() + hello.cipherSuites = make([]uint16, 0, len(configCipherSuites)) + + for _, suiteId := range preferenceOrder { + suite := mutualCipherSuite(configCipherSuites, suiteId) + if suite == nil { + continue + } + // Don't advertise TLS 1.2-only cipher suites unless + // we're attempting TLS 1.2. + if maxVersion < VersionTLS12 && suite.flags&suiteTLS12 != 0 { + continue + } + hello.cipherSuites = append(hello.cipherSuites, suiteId) + } + + _, err := io.ReadFull(config.rand(), hello.random) + if err != nil { + return nil, nil, nil, errors.New("tls: short read from Rand: " + err.Error()) + } + + // A random session ID is used to detect when the server accepted a ticket + // and is resuming a session (see RFC 5077). In TLS 1.3, it's always set as + // a compatibility measure (see RFC 8446, Section 4.1.2). + // + // The session ID is not set for QUIC connections (see RFC 9001, Section 8.4). + if c.quic == nil { + hello.sessionId = make([]byte, 32) + if _, err := io.ReadFull(config.rand(), hello.sessionId); err != nil { + return nil, nil, nil, errors.New("tls: short read from Rand: " + err.Error()) + } + } + + if maxVersion >= VersionTLS12 { + hello.supportedSignatureAlgorithms = supportedSignatureAlgorithms() + } + if testingOnlyForceClientHelloSignatureAlgorithms != nil { + hello.supportedSignatureAlgorithms = testingOnlyForceClientHelloSignatureAlgorithms + } + + var keyShareKeys *keySharePrivateKeys + if hello.supportedVersions[0] == VersionTLS13 { + // Reset the list of ciphers when the client only supports TLS 1.3. + if len(hello.supportedVersions) == 1 { + hello.cipherSuites = nil + } + if fips140tls.Required() { + hello.cipherSuites = append(hello.cipherSuites, defaultCipherSuitesTLS13FIPS...) + } else if hasAESGCMHardwareSupport { + hello.cipherSuites = append(hello.cipherSuites, defaultCipherSuitesTLS13...) + } else { + hello.cipherSuites = append(hello.cipherSuites, defaultCipherSuitesTLS13NoAES...) + } + + if len(hello.supportedCurves) == 0 { + return nil, nil, nil, errors.New("tls: no supported elliptic curves for ECDHE") + } + // curveID := hello.supportedCurves[0] + // keyShareKeys = &keySharePrivateKeys{curveID: curveID} + // // Note that if X25519MLKEM768 is supported, it will be first because + // // the preference order is fixed. + // if curveID == X25519MLKEM768 { + // keyShareKeys.ecdhe, err = generateECDHEKey(config.rand(), X25519) + // if err != nil { + // return nil, nil, nil, err + // } + // seed := make([]byte, mlkem.SeedSize) + // if _, err := io.ReadFull(config.rand(), seed); err != nil { + // return nil, nil, nil, err + // } + // keyShareKeys.mlkem, err = mlkem.NewDecapsulationKey768(seed) + // if err != nil { + // return nil, nil, nil, err + // } + // mlkemEncapsulationKey := keyShareKeys.mlkem.EncapsulationKey().Bytes() + // x25519EphemeralKey := keyShareKeys.ecdhe.PublicKey().Bytes() + // hello.keyShares = []keyShare{ + // {group: X25519MLKEM768, data: append(mlkemEncapsulationKey, x25519EphemeralKey...)}, + // } + // // If both X25519MLKEM768 and X25519 are supported, we send both key + // // shares (as a fallback) and we reuse the same X25519 ephemeral + // // key, as allowed by draft-ietf-tls-hybrid-design-09, Section 3.2. + // if slices.Contains(hello.supportedCurves, X25519) { + // hello.keyShares = append(hello.keyShares, keyShare{group: X25519, data: x25519EphemeralKey}) + // } + // } else { + // if _, ok := curveForCurveID(curveID); !ok { + // return nil, nil, nil, errors.New("tls: CurvePreferences includes unsupported curve") + // } + // keyShareKeys.ecdhe, err = generateECDHEKey(config.rand(), curveID) + // if err != nil { + // return nil, nil, nil, err + // } + // hello.keyShares = []keyShare{{group: curveID, data: keyShareKeys.ecdhe.PublicKey().Bytes()}} + // } + } + + // [UTLS] We don't need this, since it is not ready yet + // if c.quic != nil { + // p, err := c.quicGetTransportParameters() + // if err != nil { + // return nil, nil, nil, err + // } + // if p == nil { + // p = []byte{} + // } + // hello.quicTransportParameters = p + // } + + var ech *echClientContext + if c.config.EncryptedClientHelloConfigList != nil { + if c.config.MinVersion != 0 && c.config.MinVersion < VersionTLS13 { + return nil, nil, nil, errors.New("tls: MinVersion must be >= VersionTLS13 if EncryptedClientHelloConfigList is populated") + } + if c.config.MaxVersion != 0 && c.config.MaxVersion <= VersionTLS12 { + return nil, nil, nil, errors.New("tls: MaxVersion must be >= VersionTLS13 if EncryptedClientHelloConfigList is populated") + } + echConfigs, err := parseECHConfigList(c.config.EncryptedClientHelloConfigList) + if err != nil { + return nil, nil, nil, err + } + echConfig := pickECHConfig(echConfigs) + if echConfig == nil { + return nil, nil, nil, errors.New("tls: EncryptedClientHelloConfigList contains no valid configs") + } + ech = &echClientContext{config: echConfig} + hello.encryptedClientHello = []byte{1} // indicate inner hello + // We need to explicitly set these 1.2 fields to nil, as we do not + // marshal them when encoding the inner hello, otherwise transcripts + // will later mismatch. + hello.supportedPoints = nil + hello.ticketSupported = false + hello.secureRenegotiationSupported = false + hello.extendedMasterSecret = false + + echPK, err := hpke.ParseHPKEPublicKey(ech.config.KemID, ech.config.PublicKey) + if err != nil { + return nil, nil, nil, err + } + suite, err := pickECHCipherSuite(ech.config.SymmetricCipherSuite) + if err != nil { + return nil, nil, nil, err + } + ech.kdfID, ech.aeadID = suite.KDFID, suite.AEADID + info := append([]byte("tls ech\x00"), ech.config.raw...) + ech.encapsulatedKey, ech.hpkeContext, err = hpke.SetupSender(ech.config.KemID, suite.KDFID, suite.AEADID, echPK, info) + if err != nil { + return nil, nil, nil, err + } + } + + return hello, keyShareKeys, ech, nil +} + +// clientHandshakeWithOneState checks that exactly one expected state is set (1.2 or 1.3) +// and performs client TLS handshake with that state +func (c *UConn) clientHandshake(ctx context.Context) (err error) { + // [uTLS section begins] + hello := c.HandshakeState.Hello.getPrivatePtr() + ech := c.echCtx + defer func() { c.HandshakeState.Hello = hello.getPublicPtr() }() + + sessionIsLocked := c.utls.sessionController.isSessionLocked() + + // after this point exactly 1 out of 2 HandshakeState pointers is non-nil, + // useTLS13 variable tells which pointer + // [uTLS section ends] + + if c.config == nil { + c.config = defaultConfig() + } + + // This may be a renegotiation handshake, in which case some fields + // need to be reset. + c.didResume = false + + // [uTLS section begins] + // don't make new ClientHello, use hs.hello + // preserve the checks from beginning and end of makeClientHello() + if len(c.config.ServerName) == 0 && !c.config.InsecureSkipVerify && len(c.config.InsecureServerNameToVerify) == 0 { + return errors.New("tls: at least one of ServerName, InsecureSkipVerify or InsecureServerNameToVerify must be specified in the tls.Config") + } + + nextProtosLength := 0 + for _, proto := range c.config.NextProtos { + if l := len(proto); l == 0 || l > 255 { + return errors.New("tls: invalid NextProtos value") + } else { + nextProtosLength += 1 + l + } + } + + if nextProtosLength > 0xffff { + return errors.New("tls: NextProtos values too large") + } + + if c.handshakes > 0 { + hello.secureRenegotiation = c.clientFinished[:] + } + + var ( + session *SessionState + earlySecret *tls13.EarlySecret + binderKey []byte + ) + if !sessionIsLocked { + // [uTLS section ends] + + session, earlySecret, binderKey, err = c.loadSession(hello) + + // [uTLS section start] + } else { + session = c.HandshakeState.Session + + if c.HandshakeState.State13.EarlySecret != nil && session != nil { + cipherSuite := cipherSuiteTLS13ByID(session.cipherSuite) + earlySecret = tls13.NewEarlySecretFromSecret(cipherSuite.hash.New, c.HandshakeState.State13.EarlySecret) + } + + binderKey = c.HandshakeState.State13.BinderKey + } + // [uTLS section ends] + if err != nil { + return err + } + if session != nil { + defer func() { + // If we got a handshake failure when resuming a session, throw away + // the session ticket. See RFC 5077, Section 3.2. + // + // RFC 8446 makes no mention of dropping tickets on failure, but it + // does require servers to abort on invalid binders, so we need to + // delete tickets to recover from a corrupted PSK. + if err != nil { + if cacheKey := c.clientSessionCacheKey(); cacheKey != "" { + c.config.ClientSessionCache.Put(cacheKey, nil) + } + } + }() + } + + if ech != nil && c.clientHelloBuildStatus != BuildByUtls { + // Split hello into inner and outer + ech.innerHello = hello.clone() + + // Overwrite the server name in the outer hello with the public facing + // name. + hello.serverName = string(ech.config.PublicName) + // Generate a new random for the outer hello. + hello.random = make([]byte, 32) + _, err = io.ReadFull(c.config.rand(), hello.random) + if err != nil { + return errors.New("tls: short read from Rand: " + err.Error()) + } + + // NOTE: we don't do PSK GREASE, in line with boringssl, it's meant to + // work around _possibly_ broken middleboxes, but there is little-to-no + // evidence that this is actually a problem. + + if err := computeAndUpdateOuterECHExtension(hello, ech.innerHello, ech, true); err != nil { + return err + } + } + + c.serverName = hello.serverName + + if _, err := c.writeHandshakeRecord(hello, nil); err != nil { + return err + } + + if hello.earlyData { + suite := cipherSuiteTLS13ByID(session.cipherSuite) + transcript := suite.hash.New() + if err := transcriptMsg(hello, transcript); err != nil { + return err + } + earlyTrafficSecret := earlySecret.ClientEarlyTrafficSecret(transcript) + c.quicSetWriteSecret(QUICEncryptionLevelEarly, suite.id, earlyTrafficSecret) + } + + // serverHelloMsg is not included in the transcript + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + + serverHello, ok := msg.(*serverHelloMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(serverHello, msg) + } + + if err := c.pickTLSVersion(serverHello); err != nil { + return err + } + + // If we are negotiating a protocol version that's lower than what we + // support, check for the server downgrade canaries. + // See RFC 8446, Section 4.1.3. + maxVers := c.config.maxSupportedVersion(roleClient) + tls12Downgrade := string(serverHello.random[24:]) == downgradeCanaryTLS12 + tls11Downgrade := string(serverHello.random[24:]) == downgradeCanaryTLS11 + if maxVers == VersionTLS13 && c.vers <= VersionTLS12 && (tls12Downgrade || tls11Downgrade) || + maxVers == VersionTLS12 && c.vers <= VersionTLS11 && tls11Downgrade { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: downgrade attempt detected, possibly due to a MitM attack or a broken middlebox") + } + + // uTLS: do not create new handshakeState, use existing one + c.HandshakeState.ServerHello = serverHello.getPublicPtr() + if c.vers == VersionTLS13 { + hs13 := c.HandshakeState.toPrivate13() + hs13.serverHello = serverHello + hs13.hello = hello + hs13.echContext = ech + if c.HandshakeState.State13.EarlySecret != nil && session.cipherSuite != 0 { + hs13.earlySecret = tls13.NewEarlySecretFromSecret(cipherSuiteTLS13ByID(session.cipherSuite).hash.New, c.HandshakeState.State13.EarlySecret) + } + if c.HandshakeState.MasterSecret != nil && session.cipherSuite != 0 { + hs13.masterSecret = tls13.NewMasterSecretFromSecret(cipherSuiteTLS13ByID(session.cipherSuite).hash.New, c.HandshakeState.MasterSecret) + } + if !sessionIsLocked { + hs13.earlySecret = earlySecret + hs13.binderKey = binderKey + hs13.session = session + } + hs13.ctx = ctx + // In TLS 1.3, session tickets are delivered after the handshake. + err = hs13.handshake() + if handshakeState := hs13.toPublic13(); handshakeState != nil { + c.HandshakeState = *handshakeState + } + return err + } + + hs12 := c.HandshakeState.toPrivate12() + hs12.serverHello = serverHello + hs12.hello = hello + hs12.ctx = ctx + hs12.session = session + err = hs12.handshake() + if handshakeState := hs12.toPublic12(); handshakeState != nil { + c.HandshakeState = *handshakeState + } + if err != nil { + return err + } + return nil +} + +func (c *UConn) echTranscriptMsg(outer *clientHelloMsg, echCtx *echClientContext) (err error) { + // Recreate the inner ClientHello from its compressed form using server's decodeInnerClientHello function. + // See https://github.com/enetx/utls/blob/e430876b1d82fdf582efc57f3992d448e7ab3d8a/ech.go#L276-L283 + encodedInner, err := encodeInnerClientHelloReorderOuterExts(echCtx.innerHello, int(echCtx.config.MaxNameLength), c.extensionsList()) + if err != nil { + return err + } + + decodedInner, err := decodeInnerClientHello(outer, encodedInner) + if err != nil { + return err + } + + if err := transcriptMsg(decodedInner, echCtx.innerTranscript); err != nil { + return err + } + + return nil +} diff --git a/backend/vendor/github.com/enetx/utls/u_handshake_messages.go b/backend/vendor/github.com/enetx/utls/u_handshake_messages.go new file mode 100644 index 0000000..dd8a1d9 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_handshake_messages.go @@ -0,0 +1,138 @@ +// Copyright 2022 uTLS Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "golang.org/x/crypto/cryptobyte" +) + +// Only implemented client-side, for server certificates. +// Alternate certificate message formats (https://datatracker.ietf.org/doc/html/rfc7250) are not +// supported. +// https://datatracker.ietf.org/doc/html/rfc8879 +type utlsCompressedCertificateMsg struct { + raw []byte + + algorithm uint16 + uncompressedLength uint32 // uint24 + compressedCertificateMessage []byte +} + +func (m *utlsCompressedCertificateMsg) marshal() ([]byte, error) { + if m.raw != nil { + return m.raw, nil + } + + var b cryptobyte.Builder + b.AddUint8(utlsTypeCompressedCertificate) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16(m.algorithm) + b.AddUint24(m.uncompressedLength) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.compressedCertificateMessage) + }) + }) + + var err error + m.raw, err = b.Bytes() + return m.raw, err +} + +func (m *utlsCompressedCertificateMsg) unmarshal(data []byte) bool { + *m = utlsCompressedCertificateMsg{raw: data} + s := cryptobyte.String(data) + + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint16(&m.algorithm) || + !s.ReadUint24(&m.uncompressedLength) || + !readUint24LengthPrefixed(&s, &m.compressedCertificateMessage) { + return false + } + return true +} + +type utlsEncryptedExtensionsMsgExtraFields struct { + applicationSettings []byte + applicationSettingsCodepoint uint16 + customExtension []byte +} + +func (m *encryptedExtensionsMsg) utlsUnmarshal(extension uint16, extData cryptobyte.String) bool { + switch extension { + case utlsExtensionApplicationSettings: + fallthrough + case utlsExtensionApplicationSettingsNew: + m.utls.applicationSettingsCodepoint = extension + m.utls.applicationSettings = []byte(extData) + } + return true // success/unknown extension +} + +type utlsClientEncryptedExtensionsMsg struct { + raw []byte + applicationSettings []byte + applicationSettingsCodepoint uint16 + customExtension []byte +} + +func (m *utlsClientEncryptedExtensionsMsg) marshal() (x []byte, err error) { + if m.raw != nil { + return m.raw, nil + } + + var builder cryptobyte.Builder + builder.AddUint8(typeEncryptedExtensions) + builder.AddUint24LengthPrefixed(func(body *cryptobyte.Builder) { + body.AddUint16LengthPrefixed(func(extensions *cryptobyte.Builder) { + if m.applicationSettingsCodepoint != 0 { + extensions.AddUint16(m.applicationSettingsCodepoint) + extensions.AddUint16LengthPrefixed(func(msg *cryptobyte.Builder) { + msg.AddBytes(m.applicationSettings) + }) + } + if len(m.customExtension) > 0 { + extensions.AddUint16(utlsFakeExtensionCustom) + extensions.AddUint16LengthPrefixed(func(msg *cryptobyte.Builder) { + msg.AddBytes(m.customExtension) + }) + } + }) + }) + + m.raw, err = builder.Bytes() + return m.raw, err +} + +func (m *utlsClientEncryptedExtensionsMsg) unmarshal(data []byte) bool { + *m = utlsClientEncryptedExtensionsMsg{raw: data} + s := cryptobyte.String(data) + + var extensions cryptobyte.String + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint16LengthPrefixed(&extensions) || !s.Empty() { + return false + } + + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return false + } + + switch extension { + case utlsExtensionApplicationSettings: + fallthrough + case utlsExtensionApplicationSettingsNew: + m.applicationSettingsCodepoint = extension + m.applicationSettings = []byte(extData) + default: + // Unknown extensions are illegal in EncryptedExtensions. + return false + } + } + return true +} diff --git a/backend/vendor/github.com/enetx/utls/u_hpke.go b/backend/vendor/github.com/enetx/utls/u_hpke.go new file mode 100644 index 0000000..aef76be --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_hpke.go @@ -0,0 +1,35 @@ +package tls + +import ( + "github.com/enetx/utls/internal/hpke" +) + +type HPKERawPublicKey = []byte +type HPKE_KEM_ID = uint16 // RFC 9180 +type HPKE_KDF_ID = uint16 // RFC 9180 +type HPKE_AEAD_ID = uint16 // RFC 9180 + +type HPKESymmetricCipherSuite struct { + KdfId HPKE_KDF_ID + AeadId HPKE_AEAD_ID +} + +const defaultHpkeKdf = hpke.KDF_HKDF_SHA256 +const defaultHpkeKem = hpke.DHKEM_X25519_HKDF_SHA256 +const defaultHpkeAead = hpke.AEAD_AES_128_GCM + +var dummyX25519PublicKey = []byte{ + 143, 38, 37, 36, 12, 6, 229, 30, 140, 27, 167, 73, 26, 100, 203, 107, 216, + 81, 163, 222, 52, 211, 54, 210, 46, 37, 78, 216, 157, 97, 241, 244, +} + +// cipherLen returns the length of a ciphertext corresponding to a message of +// length mLen. +func cipherLen(a uint16, mLen int) int { + switch a { + case hpke.AEAD_AES_128_GCM, hpke.AEAD_AES_256_GCM, hpke.AEAD_ChaCha20Poly1305: + return mLen + 16 + default: + panic("hpke: invalid AEAD identifier") + } +} diff --git a/backend/vendor/github.com/enetx/utls/u_key_schedule.go b/backend/vendor/github.com/enetx/utls/u_key_schedule.go new file mode 100644 index 0000000..f52839d --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_key_schedule.go @@ -0,0 +1,30 @@ +package tls + +import ( + "crypto/mlkem" + + "golang.org/x/crypto/sha3" +) + +// kyberDecapsulate implements decapsulation according to Kyber Round 3. +func kyberDecapsulate(dk *mlkem.DecapsulationKey768, c []byte) ([]byte, error) { + K, err := dk.Decapsulate(c) + if err != nil { + return nil, err + } + return kyberSharedSecret(c, K), nil +} + +func kyberSharedSecret(c, K []byte) []byte { + // Package mlkem implements ML-KEM, which compared to Kyber removed a + // final hashing step. Compute SHAKE-256(K || SHA3-256(c), 32) to match Kyber. + // See https://words.filippo.io/mlkem768/#bonus-track-using-a-ml-kem-implementation-as-kyber-v3. + h := sha3.NewShake256() + h.Write(K) + ch := sha3.New256() + ch.Write(c) + h.Write(ch.Sum(nil)) + out := make([]byte, 32) + h.Read(out) + return out +} diff --git a/backend/vendor/github.com/enetx/utls/u_parrots.go b/backend/vendor/github.com/enetx/utls/u_parrots.go new file mode 100644 index 0000000..fbdbc36 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_parrots.go @@ -0,0 +1,3384 @@ +// Copyright 2017 Google Inc. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto/mlkem" + crand "crypto/rand" + "crypto/sha256" + "encoding/binary" + "errors" + "fmt" + "io" + "math" + "math/big" + "math/rand" + "sort" + "strconv" + + "github.com/enetx/utls/dicttls" +) + +var ErrUnknownClientHelloID = errors.New("tls: unknown ClientHelloID") + +// UTLSIdToSpec converts a ClientHelloID to a corresponding ClientHelloSpec. +// +// Exported internal function utlsIdToSpec per request. +func UTLSIdToSpec(id ClientHelloID) (ClientHelloSpec, error) { + return utlsIdToSpec(id) +} + +func utlsIdToSpec(id ClientHelloID) (ClientHelloSpec, error) { + switch id { + case HelloChrome_58, HelloChrome_62: + return ClientHelloSpec{ + TLSVersMax: VersionTLS12, + TLSVersMin: VersionTLS10, + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{compressionNone}, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &SessionTicketExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1}, + }, + &StatusRequestExtension{}, + &SCTExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &FakeChannelIDExtension{}, + &SupportedPointsExtension{SupportedPoints: []byte{pointFormatUncompressed}}, + &SupportedCurvesExtension{[]CurveID{CurveID(GREASE_PLACEHOLDER), + X25519, CurveP256, CurveP384}}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + GetSessionID: sha256.Sum256, + }, nil + case HelloChrome_70: + return ClientHelloSpec{ + TLSVersMin: VersionTLS10, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{ + compressionNone, + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &SessionTicketExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }}, + &StatusRequestExtension{}, + &SCTExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &FakeChannelIDExtension{}, + &SupportedPointsExtension{SupportedPoints: []byte{ + pointFormatUncompressed, + }}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{pskModeDHE}}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10}}, + &SupportedCurvesExtension{[]CurveID{ + CurveID(GREASE_PLACEHOLDER), + X25519, + CurveP256, + CurveP384, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{CertCompressionBrotli}}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloChrome_72: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + CurveID(GREASE_PLACEHOLDER), + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloChrome_83: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + CurveID(GREASE_PLACEHOLDER), + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloChrome_87: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + CurveID(GREASE_PLACEHOLDER), + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloChrome_96: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + CurveID(GREASE_PLACEHOLDER), + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloChrome_100, HelloChrome_102: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloChrome_106_Shuffle: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }), + }, nil + // Chrome w/ Post-Quantum Key Agreement + case HelloChrome_115_PQ: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519Kyber768Draft00, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519Kyber768Draft00}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }), + }, nil + // Chrome ECH + case HelloChrome_120: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{Curves: []CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{KeyShares: []KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{Modes: []uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{Versions: []uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{Algorithms: []CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + BoringGREASEECH(), + &UtlsGREASEExtension{}, + }), + }, nil + // Chrome w/ Post-Quantum Key Agreement and ECH + case HelloChrome_120_PQ: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519Kyber768Draft00, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519Kyber768Draft00}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + BoringGREASEECH(), + &UtlsGREASEExtension{}, + }), + }, nil + case HelloChrome_131: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519MLKEM768, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519MLKEM768}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + BoringGREASEECH(), + &UtlsGREASEExtension{}, + }), + }, nil + case HelloChrome_133: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519MLKEM768, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519MLKEM768}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtensionNew{SupportedProtocols: []string{"h2"}}, + BoringGREASEECH(), + &UtlsGREASEExtension{}, + }), + }, nil + case HelloFirefox_55, HelloFirefox_56: + return ClientHelloSpec{ + TLSVersMax: VersionTLS12, + TLSVersMin: VersionTLS10, + CipherSuites: []uint16{ + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + FAKE_TLS_DHE_RSA_WITH_AES_128_CBC_SHA, + FAKE_TLS_DHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{compressionNone}, + Extensions: []TLSExtension{ + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{X25519, CurveP256, CurveP384, CurveP521}}, + &SupportedPointsExtension{SupportedPoints: []byte{pointFormatUncompressed}}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + PSSWithSHA256, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA512, + ECDSAWithSHA1, + PKCS1WithSHA1}, + }, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + GetSessionID: nil, + }, nil + case HelloFirefox_63, HelloFirefox_65: + return ClientHelloSpec{ + TLSVersMin: VersionTLS10, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_CHACHA20_POLY1305_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + FAKE_TLS_DHE_RSA_WITH_AES_128_CBC_SHA, + FAKE_TLS_DHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{ + compressionNone, + }, + Extensions: []TLSExtension{ + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + X25519, + CurveP256, + CurveP384, + CurveP521, + CurveID(FakeFFDHE2048), + CurveID(FakeFFDHE3072), + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + pointFormatUncompressed, + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: X25519}, + {Group: CurveP256}, + }}, + &SupportedVersionsExtension{[]uint16{ + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10}}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + PSSWithSHA256, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA512, + ECDSAWithSHA1, + PKCS1WithSHA1, + }}, + &PSKKeyExchangeModesExtension{[]uint8{pskModeDHE}}, + &FakeRecordSizeLimitExtension{0x4001}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }}, nil + case HelloFirefox_99: + return ClientHelloSpec{ + TLSVersMin: VersionTLS10, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_CHACHA20_POLY1305_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{ + compressionNone, + }, + Extensions: []TLSExtension{ + &SNIExtension{}, //server_name + &ExtendedMasterSecretExtension{}, //extended_master_secret + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, //extensionRenegotiationInfo + &SupportedCurvesExtension{[]CurveID{ //supported_groups + X25519, + CurveP256, + CurveP384, + CurveP521, + CurveID(FakeFFDHE2048), + CurveID(FakeFFDHE3072), + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ //ec_point_formats + pointFormatUncompressed, + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, //application_layer_protocol_negotiation + &StatusRequestExtension{}, + &FakeDelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ //signature_algorithms + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + ECDSAWithSHA1, + }, + }, + &KeyShareExtension{[]KeyShare{ + {Group: X25519}, + {Group: CurveP256}, //key_share + }}, + &SupportedVersionsExtension{[]uint16{ + VersionTLS13, //supported_versions + VersionTLS12, + VersionTLS11, + VersionTLS10, + }}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ //signature_algorithms + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + PSSWithSHA256, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA512, + ECDSAWithSHA1, + PKCS1WithSHA1, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ //psk_key_exchange_modes + PskModeDHE, + }}, + &FakeRecordSizeLimitExtension{Limit: 0x4001}, //record_size_limit + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, //padding + }}, nil + case HelloFirefox_102: + return ClientHelloSpec{ + TLSVersMin: VersionTLS10, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_CHACHA20_POLY1305_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + compressionNone, + }, + Extensions: []TLSExtension{ + &SNIExtension{}, //server_name + &ExtendedMasterSecretExtension{}, //extended_master_secret + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, //extensionRenegotiationInfo + &SupportedCurvesExtension{[]CurveID{ //supported_groups + X25519, + CurveP256, + CurveP384, + CurveP521, + CurveID(FakeFFDHE2048), + CurveID(FakeFFDHE3072), + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ //ec_point_formats + pointFormatUncompressed, + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2"}}, //application_layer_protocol_negotiation + &StatusRequestExtension{}, + &FakeDelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ //signature_algorithms + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + ECDSAWithSHA1, + }, + }, + &KeyShareExtension{[]KeyShare{ + {Group: X25519}, + {Group: CurveP256}, //key_share + }}, + &SupportedVersionsExtension{[]uint16{ + VersionTLS13, //supported_versions + VersionTLS12, + }}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ //signature_algorithms + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + PSSWithSHA256, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA512, + ECDSAWithSHA1, + PKCS1WithSHA1, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ //psk_key_exchange_modes + PskModeDHE, + }}, + &FakeRecordSizeLimitExtension{Limit: 0x4001}, //record_size_limit + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, //padding + }}, nil + case HelloFirefox_105: + return ClientHelloSpec{ + TLSVersMin: VersionTLS12, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_CHACHA20_POLY1305_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + X25519, + CurveP256, + CurveP384, + CurveP521, + 256, + 257, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // uncompressed + }, + }, + &SessionTicketExtension{}, + &ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &StatusRequestExtension{}, + &FakeDelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + ECDSAWithSHA1, + }, + }, + &KeyShareExtension{ + KeyShares: []KeyShare{ + { + Group: X25519, + }, + { + Group: CurveP256, + }, + }, + }, + &SupportedVersionsExtension{ + Versions: []uint16{ + VersionTLS13, + VersionTLS12, + }, + }, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + PSSWithSHA256, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA512, + ECDSAWithSHA1, + PKCS1WithSHA1, + }, + }, + &PSKKeyExchangeModesExtension{ + Modes: []uint8{ + PskModeDHE, + }, + }, + &FakeRecordSizeLimitExtension{ + Limit: 0x4001, + }, + &UtlsPaddingExtension{ + GetPaddingLen: BoringPaddingStyle, + }, + }, + }, nil + case HelloFirefox_120: + return ClientHelloSpec{ + TLSVersMin: VersionTLS12, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_CHACHA20_POLY1305_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + X25519, + CurveP256, + CurveP384, + CurveP521, + 256, + 257, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // uncompressed + }, + }, + &SessionTicketExtension{}, + &ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &StatusRequestExtension{}, + &FakeDelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + ECDSAWithSHA1, + }, + }, + &KeyShareExtension{ + KeyShares: []KeyShare{ + { + Group: X25519, + }, + { + Group: CurveP256, + }, + }, + }, + &SupportedVersionsExtension{ + Versions: []uint16{ + VersionTLS13, + VersionTLS12, + }, + }, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + PSSWithSHA256, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA512, + ECDSAWithSHA1, + PKCS1WithSHA1, + }, + }, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &FakeRecordSizeLimitExtension{ + Limit: 0x4001, + }, + &GREASEEncryptedClientHelloExtension{ + CandidateCipherSuites: []HPKESymmetricCipherSuite{ + { + KdfId: dicttls.HKDF_SHA256, + AeadId: dicttls.AEAD_AES_128_GCM, + }, + { + KdfId: dicttls.HKDF_SHA256, + AeadId: dicttls.AEAD_CHACHA20_POLY1305, + }, + }, + CandidatePayloadLens: []uint16{223}, // +16: 239 + }, + }, + }, nil + case HelloFirefox_141: + return ClientHelloSpec{ + TLSVersMin: VersionTLS12, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_CHACHA20_POLY1305_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + X25519MLKEM768, + X25519, + CurveP256, + CurveP384, + CurveP521, + 256, + 257, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // uncompressed + }, + }, + &SessionTicketExtension{}, + &ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &StatusRequestExtension{}, + &FakeDelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + ECDSAWithSHA1, + }, + }, + &SCTExtension{}, + &KeyShareExtensionExtended{ + KeyShareExtension: &KeyShareExtension{KeyShares: []KeyShare{ + { + Group: X25519MLKEM768, + }, + { + Group: X25519, + }, + { + Group: CurveP256, + }, + }}, + HybridReuseKey: true, + }, + &SupportedVersionsExtension{ + Versions: []uint16{ + VersionTLS13, + VersionTLS12, + }, + }, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + PSSWithSHA256, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA512, + ECDSAWithSHA1, + PKCS1WithSHA1, + }, + }, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &FakeRecordSizeLimitExtension{ + Limit: 0x4001, + }, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionZlib, + CertCompressionBrotli, + CertCompressionZstd, + }}, + &GREASEEncryptedClientHelloExtension{ + CandidateCipherSuites: []HPKESymmetricCipherSuite{ + { + KdfId: dicttls.HKDF_SHA256, + AeadId: dicttls.AEAD_AES_128_GCM, + }, + { + KdfId: dicttls.HKDF_SHA256, + AeadId: dicttls.AEAD_CHACHA20_POLY1305, + }, + }, + CandidatePayloadLens: []uint16{223}, // +16: 239 + }, + }, + }, nil + case HelloIOS_11_1: + return ClientHelloSpec{ + TLSVersMax: VersionTLS12, + TLSVersMin: VersionTLS10, + CipherSuites: []uint16{ + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256, + TLS_RSA_WITH_AES_128_CBC_SHA256, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA, + }, + CompressionMethods: []byte{ + compressionNone, + }, + Extensions: []TLSExtension{ + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }}, + &StatusRequestExtension{}, + &NPNExtension{}, + &SCTExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "h2-16", "h2-15", "h2-14", "spdy/3.1", "spdy/3", "http/1.1"}}, + &SupportedPointsExtension{SupportedPoints: []byte{ + pointFormatUncompressed, + }}, + &SupportedCurvesExtension{Curves: []CurveID{ + X25519, + CurveP256, + CurveP384, + CurveP521, + }}, + }, + }, nil + case HelloIOS_12_1: + return ClientHelloSpec{ + CipherSuites: []uint16{ + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256, + TLS_RSA_WITH_AES_128_CBC_SHA256, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA, + 0xc008, + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{ + compressionNone, + }, + Extensions: []TLSExtension{ + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithSHA1, + PSSWithSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }}, + &StatusRequestExtension{}, + &NPNExtension{}, + &SCTExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "h2-16", "h2-15", "h2-14", "spdy/3.1", "spdy/3", "http/1.1"}}, + &SupportedPointsExtension{SupportedPoints: []byte{ + pointFormatUncompressed, + }}, + &SupportedCurvesExtension{[]CurveID{ + X25519, + CurveP256, + CurveP384, + CurveP521, + }}, + }, + }, nil + case HelloIOS_13: + return ClientHelloSpec{ + CipherSuites: []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256, + TLS_RSA_WITH_AES_128_CBC_SHA256, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA, + 0xc008, + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithSHA1, + PSSWithSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }}, + &StatusRequestExtension{}, + &SCTExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &KeyShareExtension{[]KeyShare{ + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }}, + &SupportedCurvesExtension{[]CurveID{ + X25519, + CurveP256, + CurveP384, + CurveP521, + }}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloIOS_14: + return ClientHelloSpec{ + // TLSVersMax: VersionTLS12, + // TLSVersMin: VersionTLS10, + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + DISABLED_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + DISABLED_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256, + TLS_RSA_WITH_AES_128_CBC_SHA256, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA, + 0xc008, + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + CurveID(GREASE_PLACEHOLDER), + X25519, + CurveP256, + CurveP384, + CurveP521, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithSHA1, + PSSWithSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloAndroid_11_OkHttp: + return ClientHelloSpec{ + CipherSuites: []uint16{ + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + 0xcca9, // Cipher Suite: TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 (0xcca9) + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + 0xcca8, // Cipher Suite: TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (0xcca8) + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{}, + // supported_groups + &SupportedCurvesExtension{[]CurveID{ + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }}, + }, + }, nil + case HelloEdge_85: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // pointFormatUncompressed + }, + }, + &SessionTicketExtension{}, + &ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }, + }, + &SCTExtension{}, + &KeyShareExtension{ + KeyShares: []KeyShare{ + { + Group: GREASE_PLACEHOLDER, + Data: []byte{ + 0, + }, + }, + { + Group: X25519, + }, + }, + }, + &PSKKeyExchangeModesExtension{ + Modes: []uint8{ + PskModeDHE, + }, + }, + &SupportedVersionsExtension{ + Versions: []uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }, + }, + &UtlsCompressCertExtension{ + Algorithms: []CertCompressionAlgo{ + CertCompressionBrotli, + }, + }, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{ + GetPaddingLen: BoringPaddingStyle, + }, + }, + }, nil + case HelloEdge_106: + return ClientHelloSpec{ + TLSVersMin: VersionTLS12, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // uncompressed + }, + }, + &SessionTicketExtension{}, + &ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }, + }, + &SCTExtension{}, + &KeyShareExtension{ + KeyShares: []KeyShare{ + { + Group: GREASE_PLACEHOLDER, + Data: []byte{ + 0, + }, + }, + { + Group: X25519, + }, + }, + }, + &PSKKeyExchangeModesExtension{ + Modes: []uint8{ + PskModeDHE, + }, + }, + &SupportedVersionsExtension{ + Versions: []uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }, + }, + &UtlsCompressCertExtension{ + Algorithms: []CertCompressionAlgo{ + CertCompressionBrotli, + }, + }, + &ApplicationSettingsExtension{ + SupportedProtocols: []string{ + "h2", + }, + }, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{ + GetPaddingLen: BoringPaddingStyle, + }, + }, + }, nil + case HelloSafari_16_0: + return ClientHelloSpec{ + TLSVersMin: VersionTLS10, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA, + FAKE_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + CurveP521, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // uncompressed + }, + }, + &ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithSHA1, + PSSWithSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }, + }, + &SCTExtension{}, + &KeyShareExtension{ + KeyShares: []KeyShare{ + { + Group: GREASE_PLACEHOLDER, + Data: []byte{ + 0, + }, + }, + { + Group: X25519, + }, + }, + }, + &PSKKeyExchangeModesExtension{ + Modes: []uint8{ + PskModeDHE, + }, + }, + &SupportedVersionsExtension{ + Versions: []uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }, + }, + &UtlsCompressCertExtension{ + Algorithms: []CertCompressionAlgo{ + CertCompressionZlib, + }, + }, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{ + GetPaddingLen: BoringPaddingStyle, + }, + }, + }, nil + case Hello360_7_5: + return ClientHelloSpec{ + CipherSuites: []uint16{ + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + FAKE_TLS_DHE_RSA_WITH_AES_256_CBC_SHA, + FAKE_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, + TLS_RSA_WITH_AES_256_CBC_SHA, + DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256, + TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_RSA_WITH_RC4_128_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + FAKE_TLS_DHE_RSA_WITH_AES_128_CBC_SHA, + FAKE_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, + FAKE_TLS_DHE_DSS_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_RC4_128_SHA, + FAKE_TLS_RSA_WITH_RC4_128_MD5, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA256, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &SNIExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + CurveP256, + CurveP384, + CurveP521, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // pointFormatUncompressed + }, + }, + &SessionTicketExtension{}, + &NPNExtension{}, + &ALPNExtension{ + AlpnProtocols: []string{ + "spdy/2", + "spdy/3", + "spdy/3.1", + "http/1.1", + }, + }, + &FakeChannelIDExtension{ + OldExtensionID: true, + }, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA1, + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithSHA1, + FakeSHA256WithDSA, + FakeSHA1WithDSA, + }, + }, + }, + }, nil + case Hello360_11_0: + return ClientHelloSpec{ + TLSVersMin: VersionTLS10, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // uncompressed + }, + }, + &SessionTicketExtension{}, + &ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }, + }, + &SCTExtension{}, + &FakeChannelIDExtension{ + OldExtensionID: false, + }, + &KeyShareExtension{ + KeyShares: []KeyShare{ + { + Group: GREASE_PLACEHOLDER, + Data: []byte{ + 0, + }, + }, + { + Group: X25519, + }, + }, + }, + &PSKKeyExchangeModesExtension{ + Modes: []uint8{ + PskModeDHE, + }, + }, + &SupportedVersionsExtension{ + Versions: []uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }, + }, + &UtlsCompressCertExtension{ + Algorithms: []CertCompressionAlgo{ + CertCompressionBrotli, + }, + }, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{ + GetPaddingLen: BoringPaddingStyle, + }, + }, + }, nil + case HelloQQ_11_1: + return ClientHelloSpec{ + TLSVersMin: VersionTLS10, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // uncompressed + }, + }, + &SessionTicketExtension{}, + &ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }, + }, + &SCTExtension{}, + &KeyShareExtension{ + KeyShares: []KeyShare{ + { + Group: GREASE_PLACEHOLDER, + Data: []byte{ + 0, + }, + }, + { + Group: X25519, + }, + }, + }, + &PSKKeyExchangeModesExtension{ + Modes: []uint8{ + PskModeDHE, + }, + }, + &SupportedVersionsExtension{ + Versions: []uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }, + }, + &UtlsCompressCertExtension{ + Algorithms: []CertCompressionAlgo{ + CertCompressionBrotli, + }, + }, + &ApplicationSettingsExtension{ + SupportedProtocols: []string{ + "h2", + }, + }, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{ + GetPaddingLen: BoringPaddingStyle, + }, + }, + }, nil + case HelloChrome_100_PSK: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPreSharedKeyExtension{}, + }, + }, nil + case HelloChrome_112_PSK_Shuf: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPreSharedKeyExtension{}, + }), + }, nil + case HelloChrome_114_Padding_PSK_Shuf: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + &UtlsPreSharedKeyExtension{}, + }), + }, nil + // Chrome w/ Post-Quantum Key Agreement + case HelloChrome_115_PQ_PSK: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519Kyber768Draft00, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519Kyber768Draft00}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPreSharedKeyExtension{}, + }), + }, nil + default: + if id.Client == helloRandomized || id.Client == helloRandomizedALPN || id.Client == helloRandomizedNoALPN { + // Use empty values as they can be filled later by UConn.ApplyPreset or manually. + return generateRandomizedSpec(&id, "", nil) + } + + return ClientHelloSpec{}, fmt.Errorf("%w: %s", ErrUnknownClientHelloID, id.Str()) + } +} + +// ShuffleChromeTLSExtensions shuffles the extensions in the ClientHelloSpec to avoid ossification. +// It shuffles every extension except GREASE, padding and pre_shared_key extensions. +// +// This feature was first introduced by Chrome 106. +func ShuffleChromeTLSExtensions(exts []TLSExtension) []TLSExtension { + // unshufCheck checks if the exts[idx] is a GREASE/padding/pre_shared_key extension, + // and returns true on success. For these extensions are considered positionally invariant. + var skipShuf = func(idx int, exts []TLSExtension) bool { + switch exts[idx].(type) { + case *UtlsGREASEExtension, *UtlsPaddingExtension, PreSharedKeyExtension: + return true + default: + return false + } + } + + // Shuffle other extensions + randInt64, err := crand.Int(crand.Reader, big.NewInt(math.MaxInt64)) + if err != nil { + // warning: random could be deterministic + rand.Shuffle(len(exts), func(i, j int) { + if skipShuf(i, exts) || skipShuf(j, exts) { + return // do not shuffle some of the extensions + } + exts[i], exts[j] = exts[j], exts[i] + }) + fmt.Println("Warning: failed to use a cryptographically secure random number generator. The shuffle can be deterministic.") + } else { + rand.New(rand.NewSource(randInt64.Int64())).Shuffle(len(exts), func(i, j int) { + if skipShuf(i, exts) || skipShuf(j, exts) { + return // do not shuffle some of the extensions + } + exts[i], exts[j] = exts[j], exts[i] + }) + } + + return exts +} + +func (uconn *UConn) applyPresetByID(id ClientHelloID) (err error) { + + if uconn.clientHelloSpec == nil { + var spec ClientHelloSpec + uconn.ClientHelloID = id + + // choose/generate the spec + switch id.Client { + case helloRandomized, helloRandomizedNoALPN, helloRandomizedALPN: + spec, err = uconn.generateRandomizedSpec() + if err != nil { + return err + } + case helloCustom: + return nil + default: + spec, err = UTLSIdToSpec(id) + if err != nil { + return err + } + } + + uconn.clientHelloSpec = &spec + } + + return uconn.ApplyPreset(uconn.clientHelloSpec) +} + +// ApplyPreset should only be used in conjunction with HelloCustom to apply custom specs. +// Fields of TLSExtensions that are slices/pointers are shared across different connections with +// same ClientHelloSpec. It is advised to use different specs and avoid any shared state. +func (uconn *UConn) ApplyPreset(p *ClientHelloSpec) error { + var err error + + err = uconn.SetTLSVers(p.TLSVersMin, p.TLSVersMax, p.Extensions) + if err != nil { + return err + } + + privateHello, clientKeySharePrivate, ech, err := uconn.makeClientHelloForApplyPreset() + if err != nil { + return err + } + uconn.HandshakeState.Hello = privateHello.getPublicPtr() + if clientKeySharePrivate != nil { + uconn.HandshakeState.State13.KeyShareKeys = clientKeySharePrivate.ToPublic() + } else { + uconn.HandshakeState.State13.KeyShareKeys = &KeySharePrivateKeys{} + } + uconn.echCtx = ech + hello := uconn.HandshakeState.Hello + + switch len(hello.Random) { + case 0: + hello.Random = make([]byte, 32) + _, err := io.ReadFull(uconn.config.rand(), hello.Random) + if err != nil { + return errors.New("tls: short read from Rand: " + err.Error()) + } + case 32: + // carry on + default: + return errors.New("ClientHello expected length: 32 bytes. Got: " + + strconv.Itoa(len(hello.Random)) + " bytes") + } + + if len(hello.CompressionMethods) == 0 { + hello.CompressionMethods = []uint8{compressionNone} + } + + // Currently, GREASE is assumed to come from BoringSSL + grease_bytes := make([]byte, 2*ssl_grease_last_index) + grease_extensions_seen := 0 + _, err = io.ReadFull(uconn.config.rand(), grease_bytes) + if err != nil { + return errors.New("tls: short read from Rand: " + err.Error()) + } + for i := range uconn.greaseSeed { + uconn.greaseSeed[i] = binary.LittleEndian.Uint16(grease_bytes[2*i : 2*i+2]) + } + if GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_extension1) == GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_extension2) { + uconn.greaseSeed[ssl_grease_extension2] ^= 0x1010 + } + + hello.CipherSuites = make([]uint16, len(p.CipherSuites)) + copy(hello.CipherSuites, p.CipherSuites) + for i := range hello.CipherSuites { + if isGREASEUint16(hello.CipherSuites[i]) { // just in case the user set a GREASE value instead of unGREASEd + hello.CipherSuites[i] = GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_cipher) + } + } + + // A random session ID is used to detect when the server accepted a ticket + // and is resuming a session (see RFC 5077). In TLS 1.3, it's always set as + // a compatibility measure (see RFC 8446, Section 4.1.2). + // + // The session ID is not set for QUIC connections (see RFC 9001, Section 8.4). + if uconn.quic == nil { + var sessionID [32]byte + _, err = io.ReadFull(uconn.config.rand(), sessionID[:]) + if err != nil { + return err + } + uconn.HandshakeState.Hello.SessionId = sessionID[:] + } + + uconn.Extensions = make([]TLSExtension, len(p.Extensions)) + copy(uconn.Extensions, p.Extensions) + + // Check whether NPN extension actually exists + var haveNPN bool + + // reGrease, and point things to each other + for _, e := range uconn.Extensions { + switch ext := e.(type) { + case *SNIExtension: + if ext.ServerName == "" { + ext.ServerName = uconn.config.ServerName + } + if uconn.config.EncryptedClientHelloConfigList != nil { + ext.ServerName = string(ech.config.PublicName) + } + case *UtlsGREASEExtension: + switch grease_extensions_seen { + case 0: + ext.Value = GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_extension1) + case 1: + ext.Value = GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_extension2) + ext.Body = []byte{0} + default: + return errors.New("at most 2 grease extensions are supported") + } + grease_extensions_seen += 1 + case *SupportedCurvesExtension: + for i := range ext.Curves { + if isGREASEUint16(uint16(ext.Curves[i])) { + ext.Curves[i] = CurveID(GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_group)) + } + } + case *KeyShareExtension: + if err := uconn.setKeyShare(&KeyShareExtensionExtended{KeyShareExtension: ext}); err != nil { + return err + } + case *KeyShareExtensionExtended: + if err := uconn.setKeyShare(ext); err != nil { + return err + } + case *SupportedVersionsExtension: + for i := range ext.Versions { + if isGREASEUint16(ext.Versions[i]) { // just in case the user set a GREASE value instead of unGREASEd + ext.Versions[i] = GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_version) + } + } + case *NPNExtension: + haveNPN = true + } + } + + // The default golang behavior in makeClientHello always sets NextProtoNeg if NextProtos is set, + // but NextProtos is also used by ALPN and our spec nmay not actually have a NPN extension + hello.NextProtoNeg = haveNPN + + err = uconn.sessionController.syncSessionExts() + if err != nil { + return err + } + + return nil +} + +func (uconn *UConn) generateRandomizedSpec() (ClientHelloSpec, error) { + return generateRandomizedSpec(&uconn.ClientHelloID, uconn.serverName, uconn.config.NextProtos) +} + +func generateRandomizedSpec( + id *ClientHelloID, + serverName string, + nextProtos []string, +) (ClientHelloSpec, error) { + p := ClientHelloSpec{} + + if id.Seed == nil { + seed, err := NewPRNGSeed() + if err != nil { + return p, err + } + id.Seed = seed + } + + r, err := newPRNGWithSeed(id.Seed) + if err != nil { + return p, err + } + + if id.Weights == nil { + id.Weights = &DefaultWeights + } + + var WithALPN bool + switch id.Client { + case helloRandomizedALPN: + WithALPN = true + case helloRandomizedNoALPN: + WithALPN = false + case helloRandomized: + if r.FlipWeightedCoin(id.Weights.Extensions_Append_ALPN) { + WithALPN = true + } else { + WithALPN = false + } + default: + return p, fmt.Errorf("using non-randomized ClientHelloID %v to generate randomized spec", id.Client) + } + + p.CipherSuites = defaultCipherSuites() + shuffledSuites, err := shuffledCiphers(r) + if err != nil { + return p, err + } + + if r.FlipWeightedCoin(id.Weights.TLSVersMax_Set_VersionTLS13) { + // randomize min TLS version + minTLSVersCandidates := []uint16{VersionTLS10, VersionTLS12} + p.TLSVersMin = minTLSVersCandidates[r.Intn(len(minTLSVersCandidates))] + p.TLSVersMax = VersionTLS13 + tls13ciphers := make([]uint16, len(defaultCipherSuitesTLS13)) + copy(tls13ciphers, defaultCipherSuitesTLS13) + r.rand.Shuffle(len(tls13ciphers), func(i, j int) { + tls13ciphers[i], tls13ciphers[j] = tls13ciphers[j], tls13ciphers[i] + }) + // appending TLS 1.3 ciphers before TLS 1.2, since that's what popular implementations do + shuffledSuites = append(tls13ciphers, shuffledSuites...) + + // TLS 1.3 forbids RC4 in any configurations + shuffledSuites = removeRC4Ciphers(shuffledSuites) + } else { + p.TLSVersMin = VersionTLS10 + p.TLSVersMax = VersionTLS12 + } + + p.CipherSuites = removeRandomCiphers(r, shuffledSuites, id.Weights.CipherSuites_Remove_RandomCiphers) + + sni := SNIExtension{serverName} + sessionTicket := SessionTicketExtension{} + + sigAndHashAlgos := []SignatureScheme{ + ECDSAWithP256AndSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PKCS1WithSHA384, + PKCS1WithSHA1, + PKCS1WithSHA512, + } + + if r.FlipWeightedCoin(id.Weights.SigAndHashAlgos_Append_ECDSAWithSHA1) { + sigAndHashAlgos = append(sigAndHashAlgos, ECDSAWithSHA1) + } + if r.FlipWeightedCoin(id.Weights.SigAndHashAlgos_Append_ECDSAWithP521AndSHA512) { + sigAndHashAlgos = append(sigAndHashAlgos, ECDSAWithP521AndSHA512) + } + if r.FlipWeightedCoin(id.Weights.SigAndHashAlgos_Append_PSSWithSHA256) || p.TLSVersMax == VersionTLS13 { + // https://tools.ietf.org/html/rfc8446 says "...RSASSA-PSS (which is mandatory in TLS 1.3)..." + sigAndHashAlgos = append(sigAndHashAlgos, PSSWithSHA256) + if r.FlipWeightedCoin(id.Weights.SigAndHashAlgos_Append_PSSWithSHA384_PSSWithSHA512) { + // these usually go together + sigAndHashAlgos = append(sigAndHashAlgos, PSSWithSHA384) + sigAndHashAlgos = append(sigAndHashAlgos, PSSWithSHA512) + } + } + + r.rand.Shuffle(len(sigAndHashAlgos), func(i, j int) { + sigAndHashAlgos[i], sigAndHashAlgos[j] = sigAndHashAlgos[j], sigAndHashAlgos[i] + }) + sigAndHash := SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: sigAndHashAlgos} + + status := StatusRequestExtension{} + sct := SCTExtension{} + ems := ExtendedMasterSecretExtension{} + points := SupportedPointsExtension{SupportedPoints: []byte{pointFormatUncompressed}} + + curveIDs := []CurveID{} + if r.FlipWeightedCoin(id.Weights.CurveIDs_Append_X25519) && p.TLSVersMax == VersionTLS13 { + curveIDs = append(curveIDs, X25519MLKEM768) + } + if r.FlipWeightedCoin(id.Weights.CurveIDs_Append_X25519) || p.TLSVersMax == VersionTLS13 { + curveIDs = append(curveIDs, X25519) + } + curveIDs = append(curveIDs, CurveP256, CurveP384) + if r.FlipWeightedCoin(id.Weights.CurveIDs_Append_CurveP521) { + curveIDs = append(curveIDs, CurveP521) + } + + curves := SupportedCurvesExtension{curveIDs} + + padding := UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle} + reneg := RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient} + + p.Extensions = []TLSExtension{ + &sni, + &sessionTicket, + &sigAndHash, + &points, + &curves, + } + + if WithALPN { + if len(nextProtos) == 0 { + // if user didn't specify alpn yet, choose something popular + nextProtos = []string{"h2", "http/1.1"} + } + alpn := ALPNExtension{AlpnProtocols: nextProtos} + p.Extensions = append(p.Extensions, &alpn) + } + + if r.FlipWeightedCoin(id.Weights.Extensions_Append_Padding) || p.TLSVersMax == VersionTLS13 { + // always include for TLS 1.3, since TLS 1.3 ClientHellos are often over 256 bytes + // and that's when padding is required to work around buggy middleboxes + p.Extensions = append(p.Extensions, &padding) + } + if r.FlipWeightedCoin(id.Weights.Extensions_Append_Status) { + p.Extensions = append(p.Extensions, &status) + } + if r.FlipWeightedCoin(id.Weights.Extensions_Append_SCT) { + p.Extensions = append(p.Extensions, &sct) + } + if r.FlipWeightedCoin(id.Weights.Extensions_Append_Reneg) { + p.Extensions = append(p.Extensions, &reneg) + } + if r.FlipWeightedCoin(id.Weights.Extensions_Append_EMS) { + p.Extensions = append(p.Extensions, &ems) + } + if p.TLSVersMax == VersionTLS13 { + ks := KeyShareExtension{[]KeyShare{ + {Group: X25519}, // the key for the group will be generated later + }} + if r.FlipWeightedCoin(id.Weights.FirstKeyShare_Set_CurveP256) { // legacy setting, not used by default + ks.KeyShares[0].Group = CurveP256 + } else { + if r.FlipWeightedCoin(id.Weights.KeyShare_Append_RandomGroups) { + ks.KeyShares = append(ks.KeyShares, KeyShare{Group: CurveP256}) + } + if r.FlipWeightedCoin(id.Weights.KeyShare_Append_RandomGroups) { + ks.KeyShares = append([]KeyShare{{Group: X25519MLKEM768}}, ks.KeyShares...) + } + } + pskExchangeModes := PSKKeyExchangeModesExtension{[]uint8{pskModeDHE}} + supportedVersionsExt := SupportedVersionsExtension{ + Versions: makeSupportedVersions(p.TLSVersMin, p.TLSVersMax), + } + p.Extensions = append(p.Extensions, &ks, &pskExchangeModes, &supportedVersionsExt) + + // Randomly add an ALPS extension. ALPS is TLS 1.3-only and may only + // appear when an ALPN extension is present + // (https://datatracker.ietf.org/doc/html/draft-vvv-tls-alps-01#section-3). + // ALPS is a draft specification at this time, but appears in + // Chrome/BoringSSL. + if WithALPN { + + // ALPS is a new addition to generateRandomizedSpec. Use a salted + // seed to create a new, independent PRNG, so that a seed used + // with the previous version of generateRandomizedSpec will + // produce the exact same spec as long as ALPS isn't selected. + r, err := newPRNGWithSaltedSeed(id.Seed, "ALPS") + if err != nil { + return p, err + } + if r.FlipWeightedCoin(id.Weights.Extensions_Append_ALPS) { + // As with the ALPN case above, default to something popular + // (unlike ALPN, ALPS can't yet be specified in uconn.config). + alps := &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}} + p.Extensions = append(p.Extensions, alps) + } + } + + // TODO: randomly add DelegatedCredentialsExtension, once it is + // sufficiently popular. + } + r.rand.Shuffle(len(p.Extensions), func(i, j int) { + p.Extensions[i], p.Extensions[j] = p.Extensions[j], p.Extensions[i] + }) + + return p, nil +} + +func removeRandomCiphers(r *prng, s []uint16, maxRemovalProbability float64) []uint16 { + // removes elements in place + // probability to remove increases for further elements + // never remove first cipher + if len(s) <= 1 { + return s + } + + // remove random elements + floatLen := float64(len(s)) + sliceLen := len(s) + for i := 1; i < sliceLen; i++ { + if r.FlipWeightedCoin(maxRemovalProbability * float64(i) / floatLen) { + s = append(s[:i], s[i+1:]...) + sliceLen-- + i-- + } + } + return s[:sliceLen] +} + +func shuffledCiphers(r *prng) ([]uint16, error) { + ciphers := make(sortableCiphers, len(cipherSuites)) + perm := r.Perm(len(cipherSuites)) + for i, suite := range cipherSuites { + ciphers[i] = sortableCipher{suite: suite.id, + isObsolete: ((suite.flags & suiteTLS12) == 0), + randomTag: perm[i]} + } + sort.Sort(ciphers) + return ciphers.GetCiphers(), nil +} + +type sortableCipher struct { + isObsolete bool + randomTag int + suite uint16 +} + +type sortableCiphers []sortableCipher + +func (ciphers sortableCiphers) Len() int { + return len(ciphers) +} + +func (ciphers sortableCiphers) Less(i, j int) bool { + if ciphers[i].isObsolete && !ciphers[j].isObsolete { + return false + } + if ciphers[j].isObsolete && !ciphers[i].isObsolete { + return true + } + return ciphers[i].randomTag < ciphers[j].randomTag +} + +func (ciphers sortableCiphers) Swap(i, j int) { + ciphers[i], ciphers[j] = ciphers[j], ciphers[i] +} + +func (ciphers sortableCiphers) GetCiphers() []uint16 { + cipherIDs := make([]uint16, len(ciphers)) + for i := range ciphers { + cipherIDs[i] = ciphers[i].suite + } + return cipherIDs +} + +func removeRC4Ciphers(s []uint16) []uint16 { + // removes elements in place + sliceLen := len(s) + for i := 0; i < sliceLen; i++ { + cipher := s[i] + if cipher == TLS_ECDHE_ECDSA_WITH_RC4_128_SHA || + cipher == TLS_ECDHE_RSA_WITH_RC4_128_SHA || + cipher == TLS_RSA_WITH_RC4_128_SHA { + s = append(s[:i], s[i+1:]...) + sliceLen-- + i-- + } + } + return s[:sliceLen] +} + +func (uconn *UConn) setKeyShare(ext *KeyShareExtensionExtended) error { + preferredCurveIsSet := false + for i := range ext.KeyShares { + curveID := ext.KeyShares[i].Group + if isGREASEUint16(uint16(curveID)) { // just in case the user set a GREASE value instead of unGREASEd + ext.KeyShares[i].Group = CurveID(GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_group)) + continue + } + if len(ext.KeyShares[i].Data) > 1 { + continue + } + + if curveID == X25519MLKEM768 || curveID == X25519Kyber768Draft00 { + ecdheKey, err := generateECDHEKey(uconn.config.rand(), X25519) + if err != nil { + return err + } + seed := make([]byte, mlkem.SeedSize) + if _, err := io.ReadFull(uconn.config.rand(), seed); err != nil { + return err + } + mlkemKey, err := mlkem.NewDecapsulationKey768(seed) + if err != nil { + return err + } + + if curveID == X25519Kyber768Draft00 { + ext.KeyShares[i].Data = append(ecdheKey.PublicKey().Bytes(), mlkemKey.EncapsulationKey().Bytes()...) + } else { + ext.KeyShares[i].Data = append(mlkemKey.EncapsulationKey().Bytes(), ecdheKey.PublicKey().Bytes()...) + } + uconn.HandshakeState.State13.KeyShareKeys.Mlkem = mlkemKey + uconn.HandshakeState.State13.KeyShareKeys.MlkemEcdhe = ecdheKey + + if ext.HybridReuseKey && len(ext.KeyShares) > i+1 && ext.KeyShares[i+1].Group == X25519 { + preferredCurveIsSet = true + uconn.HandshakeState.State13.KeyShareKeys.Ecdhe = ecdheKey + ext.KeyShares[i+1].Data = ecdheKey.PublicKey().Bytes() + } + } else { + ecdheKey, err := generateECDHEKey(uconn.config.rand(), curveID) + if err != nil { + return fmt.Errorf("unsupported Curve in KeyShareExtension: %v."+ + "To mimic it, fill the Data(key) field manually", curveID) + } + + ext.KeyShares[i].Data = ecdheKey.PublicKey().Bytes() + if !preferredCurveIsSet { + // only do this once for the first non-grease curve + uconn.HandshakeState.State13.KeyShareKeys.Ecdhe = ecdheKey + preferredCurveIsSet = true + } + } + } + + return nil +} diff --git a/backend/vendor/github.com/enetx/utls/u_pre_shared_key.go b/backend/vendor/github.com/enetx/utls/u_pre_shared_key.go new file mode 100644 index 0000000..f1e4995 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_pre_shared_key.go @@ -0,0 +1,486 @@ +package tls + +import ( + "encoding/json" + "errors" + "io" + + "golang.org/x/crypto/cryptobyte" +) + +var ErrEmptyPsk = errors.New("tls: empty psk detected; remove the psk extension for this connection or set OmitEmptyPsk to true to conceal it in utls") + +type PreSharedKeyCommon struct { + Identities []PskIdentity + Binders [][]byte + BinderKey []byte // this will be used to compute the binder when hello message is ready + EarlySecret []byte + Session *SessionState +} + +// The lifecycle of a PreSharedKeyExtension: +// +// Creation Phase: +// - The extension is created. +// +// Write Phase: +// +// - [writeToUConn() called]: +// +// > - During this phase, it is important to note that implementations should not write any session data to the UConn (Underlying Connection) as the session is not yet loaded. The session context is not active at this point. +// +// Initialization Phase: +// +// - [IsInitialized() called]: +// +// If IsInitialized() returns true +// +// > - GetPreSharedKeyCommon() will be called subsequently and the PSK states in handshake/clientHello will be fully initialized. +// +// If IsInitialized() returns false: +// +// > - [conn.loadSession() called]: +// +// >> - Once the session is available: +// +// >>> - [InitializeByUtls() called]: +// +// >>>> - The InitializeByUtls() method is invoked to initialize the extension based on the loaded session data. +// +// >>>> - This step prepares the extension for further processing. +// +// Marshal Phase: +// +// - [Len() called], [Read() called]: +// +// > - Implementations should marshal the extension into bytes, using placeholder binders to maintain the correct length. +// +// Binders Preparation Phase: +// +// - [PatchBuiltHello(hello) called]: +// +// > - The client hello is already marshaled in the "hello.Raw" format. +// +// > - Implementations are expected to update the binders within the marshaled client hello. +// +// - [GetPreSharedKeyCommon() called]: +// +// > - Implementations should gather and provide the final pre-shared key (PSK) related data. +// +// > - This data will be incorporated into both the clientHello and HandshakeState, ensuring that the PSK-related information is properly set and ready for the handshake process. +type PreSharedKeyExtension interface { + // TLSExtension must be implemented by all PreSharedKeyExtension implementations. + TLSExtension + + // If false is returned, utls will invoke `InitializeByUtls()` for the necessary initialization. + Initializable + + SetOmitEmptyPsk(val bool) + + // InitializeByUtls is invoked when IsInitialized() returns false. + // It initializes the extension using a real and valid TLS 1.3 session. + InitializeByUtls(session *SessionState, earlySecret []byte, binderKey []byte, identities []PskIdentity) + + // GetPreSharedKeyCommon retrieves the final PreSharedKey-related states as defined in PreSharedKeyCommon. + GetPreSharedKeyCommon() PreSharedKeyCommon + + // PatchBuiltHello is called once the hello message is fully applied and marshaled. + // Its purpose is to update the binders of PSK (Pre-Shared Key) identities. + PatchBuiltHello(hello *PubClientHelloMsg) error + + mustEmbedUnimplementedPreSharedKeyExtension() // this works like a type guard +} + +type UnimplementedPreSharedKeyExtension struct{} + +func (UnimplementedPreSharedKeyExtension) mustEmbedUnimplementedPreSharedKeyExtension() {} + +func (*UnimplementedPreSharedKeyExtension) IsInitialized() bool { + panic("tls: IsInitialized is not implemented for the PreSharedKeyExtension") +} + +func (*UnimplementedPreSharedKeyExtension) InitializeByUtls(session *SessionState, earlySecret []byte, binderKey []byte, identities []PskIdentity) { + panic("tls: Initialize is not implemented for the PreSharedKeyExtension") +} + +func (*UnimplementedPreSharedKeyExtension) writeToUConn(*UConn) error { + panic("tls: writeToUConn is not implemented for the PreSharedKeyExtension") +} + +func (*UnimplementedPreSharedKeyExtension) Len() int { + panic("tls: Len is not implemented for the PreSharedKeyExtension") +} + +func (*UnimplementedPreSharedKeyExtension) Read([]byte) (int, error) { + panic("tls: Read is not implemented for the PreSharedKeyExtension") +} + +func (*UnimplementedPreSharedKeyExtension) GetPreSharedKeyCommon() PreSharedKeyCommon { + panic("tls: GetPreSharedKeyCommon is not implemented for the PreSharedKeyExtension") +} + +func (*UnimplementedPreSharedKeyExtension) PatchBuiltHello(hello *PubClientHelloMsg) error { + panic("tls: ReadWithRawHello is not implemented for the PreSharedKeyExtension") +} + +func (*UnimplementedPreSharedKeyExtension) SetOmitEmptyPsk(val bool) { + panic("tls: SetOmitEmptyPsk is not implemented for the PreSharedKeyExtension") +} + +// UtlsPreSharedKeyExtension is an extension used to set the PSK extension in the +// ClientHello. +type UtlsPreSharedKeyExtension struct { + UnimplementedPreSharedKeyExtension + PreSharedKeyCommon + cipherSuite *cipherSuiteTLS13 + cachedLength *int + // Deprecated: Set OmitEmptyPsk in Config instead. + OmitEmptyPsk bool +} + +func (e *UtlsPreSharedKeyExtension) IsInitialized() bool { + return e.Session != nil +} + +func (e *UtlsPreSharedKeyExtension) InitializeByUtls(session *SessionState, earlySecret []byte, binderKey []byte, identities []PskIdentity) { + e.Session = session + e.EarlySecret = earlySecret + e.BinderKey = binderKey + e.cipherSuite = cipherSuiteTLS13ByID(e.Session.cipherSuite) + e.Identities = identities + e.Binders = make([][]byte, 0, len(e.Identities)) + for i := 0; i < len(e.Identities); i++ { + e.Binders = append(e.Binders, make([]byte, e.cipherSuite.hash.Size())) + } +} + +func (e *UtlsPreSharedKeyExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.TicketSupported = true // This doesn't matter though, as utls doesn't care about this field. We write this for consistency. + return nil +} + +func (e *UtlsPreSharedKeyExtension) GetPreSharedKeyCommon() PreSharedKeyCommon { + return e.PreSharedKeyCommon +} + +func pskExtLen(identities []PskIdentity, binders [][]byte) int { + if len(identities) == 0 || len(binders) == 0 { + // If there isn't psk identities, we don't write this ticket to the client hello, and therefore the length should be 0. + return 0 + } + length := 4 // extension type + extension length + length += 2 // identities length + for _, identity := range identities { + length += 2 + len(identity.Label) + 4 // identity length + identity + obfuscated ticket age + } + length += 2 // binders length + for _, binder := range binders { + length += len(binder) + 1 + } + return length +} + +func (e *UtlsPreSharedKeyExtension) Len() int { + if e.Session == nil { + return 0 + } + if e.cachedLength != nil { + return *e.cachedLength + } + length := pskExtLen(e.Identities, e.Binders) + e.cachedLength = &length + return length +} + +func readPskIntoBytes(b []byte, identities []PskIdentity, binders [][]byte) (int, error) { + extLen := pskExtLen(identities, binders) + if extLen == 0 { + return 0, io.EOF + } + if len(b) < extLen { + return 0, io.ErrShortBuffer + } + + b[0] = byte(extensionPreSharedKey >> 8) + b[1] = byte(extensionPreSharedKey) + b[2] = byte((extLen - 4) >> 8) + b[3] = byte(extLen - 4) + + // identities length + identitiesLength := 0 + for _, identity := range identities { + identitiesLength += 2 + len(identity.Label) + 4 // identity length + identity + obfuscated ticket age + } + b[4] = byte(identitiesLength >> 8) + b[5] = byte(identitiesLength) + + // identities + offset := 6 + for _, identity := range identities { + b[offset] = byte(len(identity.Label) >> 8) + b[offset+1] = byte(len(identity.Label)) + offset += 2 + copy(b[offset:], identity.Label) + offset += len(identity.Label) + b[offset] = byte(identity.ObfuscatedTicketAge >> 24) + b[offset+1] = byte(identity.ObfuscatedTicketAge >> 16) + b[offset+2] = byte(identity.ObfuscatedTicketAge >> 8) + b[offset+3] = byte(identity.ObfuscatedTicketAge) + offset += 4 + } + + // binders length + bindersLength := 0 + for _, binder := range binders { + // check if binder size is valid + bindersLength += len(binder) + 1 // binder length + binder + } + b[offset] = byte(bindersLength >> 8) + b[offset+1] = byte(bindersLength) + offset += 2 + + // binders + for _, binder := range binders { + b[offset] = byte(len(binder)) + offset++ + copy(b[offset:], binder) + offset += len(binder) + } + + return extLen, io.EOF +} + +func (e *UtlsPreSharedKeyExtension) SetOmitEmptyPsk(val bool) { + e.OmitEmptyPsk = val +} + +func (e *UtlsPreSharedKeyExtension) Read(b []byte) (int, error) { + if !e.OmitEmptyPsk && e.Len() == 0 { + return 0, ErrEmptyPsk + } + return readPskIntoBytes(b, e.Identities, e.Binders) +} + +func (e *UtlsPreSharedKeyExtension) PatchBuiltHello(hello *PubClientHelloMsg) error { + if e.Len() == 0 { + return nil + } + private := hello.getCachedPrivatePtr() + if private == nil { + private = hello.getPrivatePtr() + } + private.original = hello.Raw + private.pskBinders = e.Binders // set the placeholder to the private Hello + + //--- mirror loadSession() begin ---// + transcript := e.cipherSuite.hash.New() + helloBytes, err := private.marshalWithoutBinders() // no marshal() will be actually called, as we have set the field `raw` + if err != nil { + return err + } + transcript.Write(helloBytes) + pskBinders := [][]byte{e.cipherSuite.finishedHash(e.BinderKey, transcript)} + + if err := private.updateBinders(pskBinders); err != nil { + return err + } + + // copied from handshake_messages.go in 1.22 + lenWithoutBinders := len(helloBytes) + b := cryptobyte.NewFixedBuilder(private.original[:lenWithoutBinders]) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + for _, binder := range private.pskBinders { + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(binder) + }) + } + }) + if out, err := b.Bytes(); err != nil || len(out) != len(private.original) { + return errors.New("tls: internal error: failed to update binders") + } + + //--- mirror loadSession() end ---// + e.Binders = pskBinders + + // no need to care about other PSK related fields, they will be handled separately + + return io.EOF +} + +func (e *UtlsPreSharedKeyExtension) Write(b []byte) (int, error) { + return len(b), nil // ignore the data +} + +func (e *UtlsPreSharedKeyExtension) UnmarshalJSON(_ []byte) error { + return nil // ignore the data +} + +// FakePreSharedKeyExtension is an extension used to set the PSK extension in the +// ClientHello. +// +// It does not compute binders based on ClientHello, but uses the binders specified instead. +// We still need to learn more of the safety +// of hardcoding both Identities and Binders without recalculating the latter. +type FakePreSharedKeyExtension struct { + UnimplementedPreSharedKeyExtension + + Identities []PskIdentity `json:"identities"` + Binders [][]byte `json:"binders"` + // Deprecated: Set OmitEmptyPsk in Config instead. + OmitEmptyPsk bool +} + +func (e *FakePreSharedKeyExtension) IsInitialized() bool { + return e.Identities != nil && e.Binders != nil +} + +func (e *FakePreSharedKeyExtension) InitializeByUtls(session *SessionState, earlySecret []byte, binderKey []byte, identities []PskIdentity) { + panic("InitializeByUtls failed: don't let utls initialize FakePreSharedKeyExtension; provide your own identities and binders or use UtlsPreSharedKeyExtension") +} + +func (e *FakePreSharedKeyExtension) writeToUConn(uc *UConn) error { + if uc.config.ClientSessionCache == nil { + return nil // don't write the extension if there is no session cache + } + if session, ok := uc.config.ClientSessionCache.Get(uc.clientSessionCacheKey()); !ok || session == nil { + return nil // don't write the extension if there is no session cache available for this session + } + uc.HandshakeState.Hello.PskIdentities = e.Identities + uc.HandshakeState.Hello.PskBinders = e.Binders + return nil +} + +func (e *FakePreSharedKeyExtension) Len() int { + return pskExtLen(e.Identities, e.Binders) +} + +func (e *FakePreSharedKeyExtension) SetOmitEmptyPsk(val bool) { + e.OmitEmptyPsk = val +} + +func (e *FakePreSharedKeyExtension) Read(b []byte) (int, error) { + if !e.OmitEmptyPsk && e.Len() == 0 { + return 0, ErrEmptyPsk + } + for _, b := range e.Binders { + if !(anyTrue(validHashLen, func(_ int, valid *int) bool { + return len(b) == *valid + })) { + return 0, errors.New("tls: FakePreSharedKeyExtension.Read failed: invalid binder size") + } + } + + return readPskIntoBytes(b, e.Identities, e.Binders) +} + +func (e *FakePreSharedKeyExtension) GetPreSharedKeyCommon() PreSharedKeyCommon { + return PreSharedKeyCommon{ + Identities: e.Identities, + Binders: e.Binders, + } +} + +var validHashLen = mapSlice(cipherSuitesTLS13, func(c *cipherSuiteTLS13) int { + return c.hash.Size() +}) + +func (*FakePreSharedKeyExtension) PatchBuiltHello(*PubClientHelloMsg) error { + return nil // no need to patch the hello since we don't need to update binders +} + +func (e *FakePreSharedKeyExtension) Write(b []byte) (n int, err error) { + fullLen := len(b) + s := cryptobyte.String(b) + + var identitiesLength uint16 + if !s.ReadUint16(&identitiesLength) { + return 0, errors.New("tls: invalid PSK extension") + } + + // identities + for identitiesLength > 0 { + var identityLength uint16 + if !s.ReadUint16(&identityLength) { + return 0, errors.New("tls: invalid PSK extension") + } + identitiesLength -= 2 + + if identityLength > identitiesLength { + return 0, errors.New("tls: invalid PSK extension") + } + + var identity []byte + if !s.ReadBytes(&identity, int(identityLength)) { + return 0, errors.New("tls: invalid PSK extension") + } + + identitiesLength -= identityLength // identity + + var obfuscatedTicketAge uint32 + if !s.ReadUint32(&obfuscatedTicketAge) { + return 0, errors.New("tls: invalid PSK extension") + } + + e.Identities = append(e.Identities, PskIdentity{ + Label: identity, + ObfuscatedTicketAge: obfuscatedTicketAge, + }) + + identitiesLength -= 4 // obfuscated ticket age + } + + var bindersLength uint16 + if !s.ReadUint16(&bindersLength) { + return 0, errors.New("tls: invalid PSK extension") + } + + // binders + for bindersLength > 0 { + var binderLength uint8 + if !s.ReadUint8(&binderLength) { + return 0, errors.New("tls: invalid PSK extension") + } + bindersLength -= 1 + + if uint16(binderLength) > bindersLength { + return 0, errors.New("tls: invalid PSK extension") + } + + var binder []byte + if !s.ReadBytes(&binder, int(binderLength)) { + return 0, errors.New("tls: invalid PSK extension") + } + + e.Binders = append(e.Binders, binder) + + bindersLength -= uint16(binderLength) + } + + return fullLen, nil +} + +func (e *FakePreSharedKeyExtension) UnmarshalJSON(data []byte) error { + var pskAccepter struct { + PskIdentities []PskIdentity `json:"identities"` + PskBinders [][]byte `json:"binders"` + } + + if err := json.Unmarshal(data, &pskAccepter); err != nil { + return err + } + + e.Identities = pskAccepter.PskIdentities + e.Binders = pskAccepter.PskBinders + return nil +} + +// type guard +var ( + _ PreSharedKeyExtension = (*UtlsPreSharedKeyExtension)(nil) + _ TLSExtensionJSON = (*UtlsPreSharedKeyExtension)(nil) + _ PreSharedKeyExtension = (*FakePreSharedKeyExtension)(nil) + _ TLSExtensionJSON = (*FakePreSharedKeyExtension)(nil) + _ TLSExtensionWriter = (*FakePreSharedKeyExtension)(nil) +) + +// type ExternalPreSharedKeyExtension struct{} // TODO: wait for whoever cares about external PSK to implement it diff --git a/backend/vendor/github.com/enetx/utls/u_prng.go b/backend/vendor/github.com/enetx/utls/u_prng.go new file mode 100644 index 0000000..6996efe --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_prng.go @@ -0,0 +1,188 @@ +/* + * Copyright (c) 2019, Psiphon Inc. + * All rights reserved. + * + * Released under utls licence: + * https://github.com/enetx/utls/blob/master/LICENSE + */ + +// This code is a pared down version of: +// https://github.com/Psiphon-Labs/psiphon-tunnel-core/blob/158caea562287284cc3fa5fcd1b3c97b1addf659/psiphon/common/prng/prng.go + +package tls + +import ( + crypto_rand "crypto/rand" + "encoding/binary" + "io" + "math" + "math/rand" + "sync" + + "golang.org/x/crypto/hkdf" + "golang.org/x/crypto/sha3" +) + +const ( + PRNGSeedLength = 32 +) + +// PRNGSeed is a PRNG seed. +type PRNGSeed [PRNGSeedLength]byte + +// NewPRNGSeed creates a new PRNG seed using crypto/rand.Read. +func NewPRNGSeed() (*PRNGSeed, error) { + seed := new(PRNGSeed) + _, err := crypto_rand.Read(seed[:]) + if err != nil { + return nil, err + } + return seed, nil +} + +// newSaltedPRNGSeed creates a new seed derived from an existing seed and a +// salt. A HKDF is applied to the seed and salt. +// +// newSaltedPRNGSeed is intended for use cases where a single seed needs to be +// used in distinct contexts to produce independent random streams. +func newSaltedPRNGSeed(seed *PRNGSeed, salt string) (*PRNGSeed, error) { + saltedSeed := new(PRNGSeed) + _, err := io.ReadFull( + hkdf.New(sha3.New256, seed[:], []byte(salt), nil), saltedSeed[:]) + if err != nil { + return nil, err + } + return saltedSeed, nil +} + +// prng is a seeded, unbiased PRNG based on SHAKE256. that is suitable for use +// cases such as obfuscation. Seeding is based on crypto/rand.Read. +// +// This PRNG is _not_ for security use cases including production cryptographic +// key generation. +// +// It is safe to make concurrent calls to a PRNG instance. +// +// PRNG conforms to io.Reader and math/rand.Source, with additional helper +// functions. +type prng struct { + rand *rand.Rand + randomStreamMutex sync.Mutex + randomStream sha3.ShakeHash +} + +// newPRNG generates a seed and creates a PRNG with that seed. +func newPRNG() (*prng, error) { + seed, err := NewPRNGSeed() + if err != nil { + return nil, err + } + return newPRNGWithSeed(seed) +} + +// newPRNGWithSeed initializes a new PRNG using an existing seed. +func newPRNGWithSeed(seed *PRNGSeed) (*prng, error) { + shake := sha3.NewShake256() + _, err := shake.Write(seed[:]) + if err != nil { + return nil, err + } + p := &prng{ + randomStream: shake, + } + p.rand = rand.New(p) + return p, nil +} + +// newPRNGWithSaltedSeed initializes a new PRNG using a seed derived from an +// existing seed and a salt with NewSaltedSeed. +func newPRNGWithSaltedSeed(seed *PRNGSeed, salt string) (*prng, error) { + saltedSeed, err := newSaltedPRNGSeed(seed, salt) + if err != nil { + return nil, err + } + return newPRNGWithSeed(saltedSeed) +} + +// Read reads random bytes from the PRNG stream into b. Read conforms to +// io.Reader and always returns len(p), nil. +func (p *prng) Read(b []byte) (int, error) { + p.randomStreamMutex.Lock() + defer p.randomStreamMutex.Unlock() + + // ShakeHash.Read never returns an error: + // https://godoc.org/golang.org/x/crypto/sha3#ShakeHash + _, _ = io.ReadFull(p.randomStream, b) + + return len(b), nil +} + +// Int63 is equivalent to math/read.Int63. +func (p *prng) Int63() int64 { + i := p.Uint64() + return int64(i & (1<<63 - 1)) +} + +// Int63 is equivalent to math/read.Uint64. +func (p *prng) Uint64() uint64 { + var b [8]byte + p.Read(b[:]) + return binary.BigEndian.Uint64(b[:]) +} + +// Seed must exist in order to use a PRNG as a math/rand.Source. This call is +// not supported and ignored. +func (p *prng) Seed(_ int64) { +} + +// FlipWeightedCoin returns the result of a weighted +// random coin flip. If the weight is 0.5, the outcome +// is equally likely to be true or false. If the weight +// is 1.0, the outcome is always true, and if the +// weight is 0.0, the outcome is always false. +// +// Input weights > 1.0 are treated as 1.0. +func (p *prng) FlipWeightedCoin(weight float64) bool { + if weight > 1.0 { + weight = 1.0 + } + f := float64(p.Int63()) / float64(math.MaxInt64) + return f > 1.0-weight +} + +// Intn is equivalent to math/read.Intn, except it returns 0 if n <= 0 +// instead of panicking. +func (p *prng) Intn(n int) int { + if n <= 0 { + return 0 + } + return p.rand.Intn(n) +} + +// Int63n is equivalent to math/read.Int63n, except it returns 0 if n <= 0 +// instead of panicking. +func (p *prng) Int63n(n int64) int64 { + if n <= 0 { + return 0 + } + return p.rand.Int63n(n) +} + +// Intn is equivalent to math/read.Perm. +func (p *prng) Perm(n int) []int { + return p.rand.Perm(n) +} + +// Range selects a random integer in [min, max]. +// If min < 0, min is set to 0. If max < min, min is returned. +func (p *prng) Range(min, max int) int { + if min < 0 { + min = 0 + } + if max < min { + return min + } + n := p.Intn(max - min + 1) + n += min + return n +} diff --git a/backend/vendor/github.com/enetx/utls/u_public.go b/backend/vendor/github.com/enetx/utls/u_public.go new file mode 100644 index 0000000..7b2461c --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_public.go @@ -0,0 +1,925 @@ +// Copyright 2017 Google Inc. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto" + "crypto/ecdh" + "crypto/mlkem" + "crypto/x509" + "hash" + "time" +) + +// ClientHandshakeState includes both TLS 1.3-only and TLS 1.2-only states, +// only one of them will be used, depending on negotiated version. +// +// ClientHandshakeState will be converted into and from either +// - clientHandshakeState (TLS 1.2) +// - clientHandshakeStateTLS13 (TLS 1.3) +// +// uTLS will call .handshake() on one of these private internal states, +// to perform TLS handshake using standard crypto/tls implementation. +type PubClientHandshakeState struct { + C *Conn + ServerHello *PubServerHelloMsg + Hello *PubClientHelloMsg + MasterSecret []byte + Session *SessionState + + State12 TLS12OnlyState + State13 TLS13OnlyState + + uconn *UConn +} + +// TLS 1.3 only +type TLS13OnlyState struct { + // Deprecated: Use KeyShareKeys instead. KeyShareKeys will take precedence if both are set. + // Support may be removed in the future. + EcdheKey *ecdh.PrivateKey + // Deprecated: Use KeyShareKeys instead. This variable is no longer used. + // Will be removed in the future. + KeySharesParams *KeySharesParameters + // Deprecated: Use KeyShareKeys instead. This variable is no longer used. + // Will be removed in the future. + KEMKey *KemPrivateKey + + KeyShareKeys *KeySharePrivateKeys + Suite *PubCipherSuiteTLS13 + EarlySecret []byte + BinderKey []byte + CertReq *CertificateRequestMsgTLS13 + UsingPSK bool // don't set this field when building client hello + SentDummyCCS bool + Transcript hash.Hash + TrafficSecret []byte // client_application_traffic_secret_0 +} + +// TLS 1.2 and before only +type TLS12OnlyState struct { + FinishedHash FinishedHash + Suite PubCipherSuite +} + +func (chs *TLS13OnlyState) private13KeyShareKeys() *keySharePrivateKeys { + if chs.KeyShareKeys != nil { + return chs.KeyShareKeys.ToPrivate() + } + + if chs.EcdheKey != nil { + return &keySharePrivateKeys{ + ecdhe: chs.EcdheKey, + } + } + + return nil +} + +// func kyberGoToCircl(kyberKey *mlkem768.DecapsulationKey, ecdhKey *ecdh.PrivateKey) (kem.PrivateKey, error) { +// return hybrid.Kyber768X25519().UnmarshalBinaryPrivateKey(append(ecdhKey.Bytes(), kyberKey.Bytes()...)) +// } + +func (chs *PubClientHandshakeState) toPrivate13() *clientHandshakeStateTLS13 { + if chs == nil { + return nil + } else { + return &clientHandshakeStateTLS13{ + c: chs.C, + serverHello: chs.ServerHello.getPrivatePtr(), + hello: chs.Hello.getPrivatePtr(), + keyShareKeys: chs.State13.private13KeyShareKeys(), + + session: chs.Session, + binderKey: chs.State13.BinderKey, + + certReq: chs.State13.CertReq.toPrivate(), + usingPSK: chs.State13.UsingPSK, + sentDummyCCS: chs.State13.SentDummyCCS, + suite: chs.State13.Suite.toPrivate(), + transcript: chs.State13.Transcript, + trafficSecret: chs.State13.TrafficSecret, + + uconn: chs.uconn, + } + } +} + +func (chs13 *clientHandshakeStateTLS13) toPublic13() *PubClientHandshakeState { + if chs13 == nil { + return nil + } else { + tls13State := TLS13OnlyState{ + KeyShareKeys: chs13.keyShareKeys.ToPublic(), + EarlySecret: chs13.earlySecret.Secret(), + BinderKey: chs13.binderKey, + CertReq: chs13.certReq.toPublic(), + UsingPSK: chs13.usingPSK, + SentDummyCCS: chs13.sentDummyCCS, + Suite: chs13.suite.toPublic(), + TrafficSecret: chs13.trafficSecret, + Transcript: chs13.transcript, + } + return &PubClientHandshakeState{ + C: chs13.c, + ServerHello: chs13.serverHello.getPublicPtr(), + Hello: chs13.hello.getPublicPtr(), + + Session: chs13.session, + + MasterSecret: chs13.masterSecret.Secret(), + + State13: tls13State, + + uconn: chs13.uconn, + } + } +} + +func (chs *PubClientHandshakeState) toPrivate12() *clientHandshakeState { + if chs == nil { + return nil + } else { + return &clientHandshakeState{ + c: chs.C, + serverHello: chs.ServerHello.getPrivatePtr(), + hello: chs.Hello.getPrivatePtr(), + suite: chs.State12.Suite.getPrivatePtr(), + session: chs.Session, + + masterSecret: chs.MasterSecret, + + finishedHash: chs.State12.FinishedHash.getPrivateObj(), + + uconn: chs.uconn, + } + } +} + +func (chs12 *clientHandshakeState) toPublic12() *PubClientHandshakeState { + if chs12 == nil { + return nil + } else { + tls12State := TLS12OnlyState{ + Suite: chs12.suite.getPublicObj(), + FinishedHash: chs12.finishedHash.getPublicObj(), + } + return &PubClientHandshakeState{ + C: chs12.c, + ServerHello: chs12.serverHello.getPublicPtr(), + Hello: chs12.hello.getPublicPtr(), + + Session: chs12.session, + + MasterSecret: chs12.masterSecret, + + State12: tls12State, + + uconn: chs12.uconn, + } + } +} + +// type EcdheParameters interface { +// ecdheParameters +// } + +type CertificateRequestMsgTLS13 struct { + // Deprecated: crypto/tls no longer use this variable. This field won't be read or used by utls, but will still be populated. + // Support may be removed in the future. + Raw []byte + + OcspStapling bool + Scts bool + SupportedSignatureAlgorithms []SignatureScheme + SupportedSignatureAlgorithmsCert []SignatureScheme + CertificateAuthorities [][]byte +} + +func (crm *certificateRequestMsgTLS13) toPublic() *CertificateRequestMsgTLS13 { + if crm == nil { + return nil + } else { + rawBytes := []byte{} + if raw, err := crm.marshal(); err == nil { + rawBytes = raw + } + + return &CertificateRequestMsgTLS13{ + Raw: rawBytes, + OcspStapling: crm.ocspStapling, + Scts: crm.scts, + SupportedSignatureAlgorithms: crm.supportedSignatureAlgorithms, + SupportedSignatureAlgorithmsCert: crm.supportedSignatureAlgorithmsCert, + CertificateAuthorities: crm.certificateAuthorities, + } + } +} + +func (crm *CertificateRequestMsgTLS13) toPrivate() *certificateRequestMsgTLS13 { + if crm == nil { + return nil + } else { + return &certificateRequestMsgTLS13{ + ocspStapling: crm.OcspStapling, + scts: crm.Scts, + supportedSignatureAlgorithms: crm.SupportedSignatureAlgorithms, + supportedSignatureAlgorithmsCert: crm.SupportedSignatureAlgorithmsCert, + certificateAuthorities: crm.CertificateAuthorities, + } + } +} + +type PubCipherSuiteTLS13 struct { + Id uint16 + KeyLen int + Aead func(key, fixedNonce []byte) aead + Hash crypto.Hash +} + +func (c *cipherSuiteTLS13) toPublic() *PubCipherSuiteTLS13 { + if c == nil { + return nil + } else { + return &PubCipherSuiteTLS13{ + Id: c.id, + KeyLen: c.keyLen, + Aead: c.aead, + Hash: c.hash, + } + } +} + +func (c *PubCipherSuiteTLS13) toPrivate() *cipherSuiteTLS13 { + if c == nil { + return nil + } else { + return &cipherSuiteTLS13{ + id: c.Id, + keyLen: c.KeyLen, + aead: c.Aead, + hash: c.Hash, + } + } +} + +type PubServerHelloMsg struct { + Raw []byte // renamed to serverHelloMsg.original in crypto/tls + Vers uint16 + Random []byte + SessionId []byte + CipherSuite uint16 + CompressionMethod uint8 + NextProtoNeg bool + NextProtos []string + OcspStapling bool + Scts [][]byte + ExtendedMasterSecret bool + TicketSupported bool // used by go tls to determine whether to add the session ticket ext + SecureRenegotiation []byte + SecureRenegotiationSupported bool + AlpnProtocol string + + // 1.3 + SupportedVersion uint16 + ServerShare KeyShare + SelectedIdentityPresent bool + SelectedIdentity uint16 + Cookie []byte // HelloRetryRequest extension + SelectedGroup CurveID // HelloRetryRequest extension + +} + +func (shm *PubServerHelloMsg) getPrivatePtr() *serverHelloMsg { + if shm == nil { + return nil + } else { + return &serverHelloMsg{ + original: shm.Raw, + vers: shm.Vers, + random: shm.Random, + sessionId: shm.SessionId, + cipherSuite: shm.CipherSuite, + compressionMethod: shm.CompressionMethod, + nextProtoNeg: shm.NextProtoNeg, + nextProtos: shm.NextProtos, + ocspStapling: shm.OcspStapling, + scts: shm.Scts, + extendedMasterSecret: shm.ExtendedMasterSecret, + ticketSupported: shm.TicketSupported, + secureRenegotiation: shm.SecureRenegotiation, + secureRenegotiationSupported: shm.SecureRenegotiationSupported, + alpnProtocol: shm.AlpnProtocol, + supportedVersion: shm.SupportedVersion, + serverShare: shm.ServerShare.ToPrivate(), + selectedIdentityPresent: shm.SelectedIdentityPresent, + selectedIdentity: shm.SelectedIdentity, + cookie: shm.Cookie, + selectedGroup: shm.SelectedGroup, + } + } +} + +func (shm *serverHelloMsg) getPublicPtr() *PubServerHelloMsg { + if shm == nil { + return nil + } else { + return &PubServerHelloMsg{ + Raw: shm.original, + Vers: shm.vers, + Random: shm.random, + SessionId: shm.sessionId, + CipherSuite: shm.cipherSuite, + CompressionMethod: shm.compressionMethod, + NextProtoNeg: shm.nextProtoNeg, + NextProtos: shm.nextProtos, + OcspStapling: shm.ocspStapling, + Scts: shm.scts, + ExtendedMasterSecret: shm.extendedMasterSecret, + TicketSupported: shm.ticketSupported, + SecureRenegotiation: shm.secureRenegotiation, + SecureRenegotiationSupported: shm.secureRenegotiationSupported, + AlpnProtocol: shm.alpnProtocol, + SupportedVersion: shm.supportedVersion, + ServerShare: shm.serverShare.ToPublic(), + SelectedIdentityPresent: shm.selectedIdentityPresent, + SelectedIdentity: shm.selectedIdentity, + Cookie: shm.cookie, + SelectedGroup: shm.selectedGroup, + } + } +} + +type PubClientHelloMsg struct { + Raw []byte // renamed to clientHelloMsg.original in crypto/tls + Vers uint16 + Random []byte + SessionId []byte + CipherSuites []uint16 + CompressionMethods []uint8 + NextProtoNeg bool + ServerName string + OcspStapling bool + Scts bool + Ems bool // [uTLS] actually implemented due to its prevalence + SupportedCurves []CurveID + SupportedPoints []uint8 + TicketSupported bool + SessionTicket []uint8 + SupportedSignatureAlgorithms []SignatureScheme + SecureRenegotiation []byte + SecureRenegotiationSupported bool + AlpnProtocols []string + + // 1.3 + SupportedSignatureAlgorithmsCert []SignatureScheme + SupportedVersions []uint16 + Cookie []byte + KeyShares []KeyShare + EarlyData bool + PskModes []uint8 + PskIdentities []PskIdentity + PskBinders [][]byte + QuicTransportParameters []byte + + cachedPrivateHello *clientHelloMsg // todo: further optimize to reduce clientHelloMsg construction + encryptedClientHello []byte +} + +func (chm *PubClientHelloMsg) getPrivatePtr() *clientHelloMsg { + if chm == nil { + return nil + } else { + private := &clientHelloMsg{ + original: chm.Raw, + vers: chm.Vers, + random: chm.Random, + sessionId: chm.SessionId, + cipherSuites: chm.CipherSuites, + compressionMethods: chm.CompressionMethods, + serverName: chm.ServerName, + ocspStapling: chm.OcspStapling, + supportedCurves: chm.SupportedCurves, + supportedPoints: chm.SupportedPoints, + ticketSupported: chm.TicketSupported, + sessionTicket: chm.SessionTicket, + supportedSignatureAlgorithms: chm.SupportedSignatureAlgorithms, + supportedSignatureAlgorithmsCert: chm.SupportedSignatureAlgorithmsCert, + secureRenegotiationSupported: chm.SecureRenegotiationSupported, + secureRenegotiation: chm.SecureRenegotiation, + extendedMasterSecret: chm.Ems, + alpnProtocols: chm.AlpnProtocols, + scts: chm.Scts, + + supportedVersions: chm.SupportedVersions, + cookie: chm.Cookie, + keyShares: KeyShares(chm.KeyShares).ToPrivate(), + earlyData: chm.EarlyData, + pskModes: chm.PskModes, + pskIdentities: PskIdentities(chm.PskIdentities).ToPrivate(), + pskBinders: chm.PskBinders, + quicTransportParameters: chm.QuicTransportParameters, + encryptedClientHello: chm.encryptedClientHello, + + nextProtoNeg: chm.NextProtoNeg, + } + chm.cachedPrivateHello = private + return private + } +} + +func (chm *PubClientHelloMsg) getCachedPrivatePtr() *clientHelloMsg { + if chm == nil { + return nil + } else { + return chm.cachedPrivateHello + } +} + +func (chm *clientHelloMsg) getPublicPtr() *PubClientHelloMsg { + if chm == nil { + return nil + } else { + return &PubClientHelloMsg{ + Raw: chm.original, + Vers: chm.vers, + Random: chm.random, + SessionId: chm.sessionId, + CipherSuites: chm.cipherSuites, + CompressionMethods: chm.compressionMethods, + NextProtoNeg: chm.nextProtoNeg, + ServerName: chm.serverName, + OcspStapling: chm.ocspStapling, + Scts: chm.scts, + Ems: chm.extendedMasterSecret, + SupportedCurves: chm.supportedCurves, + SupportedPoints: chm.supportedPoints, + TicketSupported: chm.ticketSupported, + SessionTicket: chm.sessionTicket, + SupportedSignatureAlgorithms: chm.supportedSignatureAlgorithms, + SecureRenegotiation: chm.secureRenegotiation, + SecureRenegotiationSupported: chm.secureRenegotiationSupported, + AlpnProtocols: chm.alpnProtocols, + + SupportedSignatureAlgorithmsCert: chm.supportedSignatureAlgorithmsCert, + SupportedVersions: chm.supportedVersions, + Cookie: chm.cookie, + KeyShares: keyShares(chm.keyShares).ToPublic(), + EarlyData: chm.earlyData, + PskModes: chm.pskModes, + PskIdentities: pskIdentities(chm.pskIdentities).ToPublic(), + PskBinders: chm.pskBinders, + QuicTransportParameters: chm.quicTransportParameters, + cachedPrivateHello: chm, + encryptedClientHello: chm.encryptedClientHello, + } + } +} + +// UnmarshalClientHello allows external code to parse raw client hellos. +// It returns nil on failure. +func UnmarshalClientHello(data []byte) *PubClientHelloMsg { + m := &clientHelloMsg{} + if m.unmarshal(data) { + return m.getPublicPtr() + } + return nil +} + +// Marshal allows external code to convert a ClientHello object back into +// raw bytes. +func (chm *PubClientHelloMsg) Marshal() ([]byte, error) { + return chm.getPrivatePtr().marshal() +} + +// A CipherSuite is a specific combination of key agreement, cipher and MAC +// function. All cipher suites currently assume RSA key agreement. +type PubCipherSuite struct { + Id uint16 + // the lengths, in bytes, of the key material needed for each component. + KeyLen int + MacLen int + IvLen int + Ka func(version uint16) keyAgreement + // flags is a bitmask of the suite* values, above. + Flags int + Cipher func(key, iv []byte, isRead bool) interface{} + Mac func(macKey []byte) hash.Hash + Aead func(key, fixedNonce []byte) aead +} + +func (cs *PubCipherSuite) getPrivatePtr() *cipherSuite { + if cs == nil { + return nil + } else { + return &cipherSuite{ + id: cs.Id, + keyLen: cs.KeyLen, + macLen: cs.MacLen, + ivLen: cs.IvLen, + ka: cs.Ka, + flags: cs.Flags, + cipher: cs.Cipher, + mac: cs.Mac, + aead: cs.Aead, + } + } +} + +func (cs *cipherSuite) getPublicObj() PubCipherSuite { + if cs == nil { + return PubCipherSuite{} + } else { + return PubCipherSuite{ + Id: cs.id, + KeyLen: cs.keyLen, + MacLen: cs.macLen, + IvLen: cs.ivLen, + Ka: cs.ka, + Flags: cs.flags, + Cipher: cs.cipher, + Mac: cs.mac, + Aead: cs.aead, + } + } +} + +// A FinishedHash calculates the hash of a set of handshake messages suitable +// for including in a Finished message. +type FinishedHash struct { + Client hash.Hash + Server hash.Hash + + // Prior to TLS 1.2, an additional MD5 hash is required. + ClientMD5 hash.Hash + ServerMD5 hash.Hash + + // In TLS 1.2, a full buffer is sadly required. + Buffer []byte + + Version uint16 + Prfv2 prfFunc + + // Deprecated: Use Prfv2 instead. Prfv2 will be used if both are set. + Prf prfFuncOld +} + +type prfFuncOld func(result, secret, label, seed []byte) + +func prfFuncV1ToV2(v1 prfFuncOld) prfFunc { + return func(secret []byte, label string, seed []byte, keyLen int) []byte { + res := make([]byte, keyLen) + v1(res, secret, []byte(label), seed) + return res + } +} + +func prfFuncV2ToV1(v2 prfFunc) prfFuncOld { + return func(result, secret, label, seed []byte) { + copy(result, v2(secret, string(label), seed, len(result))) + } +} + +func (fh *FinishedHash) getPrivateObj() finishedHash { + if fh == nil { + return finishedHash{} + } else { + res := finishedHash{ + client: fh.Client, + server: fh.Server, + clientMD5: fh.ClientMD5, + serverMD5: fh.ServerMD5, + buffer: fh.Buffer, + version: fh.Version, + } + + if fh.Prfv2 != nil { + res.prf = fh.Prfv2 + } else if fh.Prf != nil { + res.prf = prfFuncV1ToV2(fh.Prf) + } + + return res + } +} + +func (fh *finishedHash) getPublicObj() FinishedHash { + if fh == nil { + return FinishedHash{} + } else { + res := FinishedHash{ + Client: fh.client, + Server: fh.server, + ClientMD5: fh.clientMD5, + ServerMD5: fh.serverMD5, + Buffer: fh.buffer, + Version: fh.version, + } + + res.Prfv2 = fh.prf + res.Prf = prfFuncV2ToV1(fh.prf) + + return res + } +} + +// TLS 1.3 Key Share. See RFC 8446, Section 4.2.8. +type KeyShare struct { + Group CurveID `json:"group"` + Data []byte `json:"key_exchange,omitempty"` // optional +} + +func (ks KeyShare) ToPrivate() keyShare { + return keyShare{group: ks.Group, data: ks.Data} +} + +func (ks keyShare) ToPublic() KeyShare { + return KeyShare{Group: ks.group, Data: ks.data} +} + +type KeyShares []KeyShare +type keyShares []keyShare + +func (kss keyShares) ToPublic() []KeyShare { + var KSS []KeyShare + for _, ks := range kss { + KSS = append(KSS, ks.ToPublic()) + } + return KSS +} +func (KSS KeyShares) ToPrivate() []keyShare { + var kss []keyShare + for _, KS := range KSS { + kss = append(kss, KS.ToPrivate()) + } + return kss +} + +// TLS 1.3 PSK Identity. Can be a Session Ticket, or a reference to a saved +// session. See RFC 8446, Section 4.2.11. +type PskIdentity struct { + Label []byte `json:"identity"` + ObfuscatedTicketAge uint32 `json:"obfuscated_ticket_age"` +} + +type PskIdentities []PskIdentity +type pskIdentities []pskIdentity + +func (pss pskIdentities) ToPublic() []PskIdentity { + var PSS []PskIdentity + for _, ps := range pss { + PSS = append(PSS, PskIdentity{Label: ps.label, ObfuscatedTicketAge: ps.obfuscatedTicketAge}) + } + return PSS +} + +func (PSS PskIdentities) ToPrivate() []pskIdentity { + var pss []pskIdentity + for _, PS := range PSS { + pss = append(pss, pskIdentity{label: PS.Label, obfuscatedTicketAge: PS.ObfuscatedTicketAge}) + } + return pss +} + +// ClientSessionState is public, but all its fields are private. Let's add setters, getters and constructor + +// ClientSessionState contains the state needed by clients to resume TLS sessions. +func MakeClientSessionState( + SessionTicket []uint8, + Vers uint16, + CipherSuite uint16, + MasterSecret []byte, + ServerCertificates []*x509.Certificate, + VerifiedChains [][]*x509.Certificate) *ClientSessionState { + // TODO: Add EMS to this constructor in uTLS v2 + css := &ClientSessionState{ + session: &SessionState{ + version: Vers, + cipherSuite: CipherSuite, + secret: MasterSecret, + peerCertificates: ServerCertificates, + verifiedChains: VerifiedChains, + ticket: SessionTicket, + }, + } + return css +} + +// Encrypted ticket used for session resumption with server +func (css *ClientSessionState) SessionTicket() []uint8 { + return css.session.ticket +} + +// SSL/TLS version negotiated for the session +func (css *ClientSessionState) Vers() uint16 { + return css.session.version +} + +// Ciphersuite negotiated for the session +func (css *ClientSessionState) CipherSuite() uint16 { + return css.session.cipherSuite +} + +// MasterSecret generated by client on a full handshake +func (css *ClientSessionState) MasterSecret() []byte { + return css.session.secret +} + +func (css *ClientSessionState) EMS() bool { + return css.session.extMasterSecret +} + +// Certificate chain presented by the server +func (css *ClientSessionState) ServerCertificates() []*x509.Certificate { + return css.session.peerCertificates +} + +// Certificate chains we built for verification +func (css *ClientSessionState) VerifiedChains() [][]*x509.Certificate { + return css.session.verifiedChains +} + +func (css *ClientSessionState) SetSessionTicket(SessionTicket []uint8) { + css.session.ticket = SessionTicket +} + +func (css *ClientSessionState) SetVers(Vers uint16) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.version = Vers +} + +func (css *ClientSessionState) SetCipherSuite(CipherSuite uint16) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.cipherSuite = CipherSuite +} + +func (css *ClientSessionState) SetCreatedAt(createdAt uint64) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.createdAt = createdAt +} + +func (css *ClientSessionState) SetMasterSecret(MasterSecret []byte) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.secret = MasterSecret +} + +func (css *ClientSessionState) SetEMS(ems bool) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.extMasterSecret = ems +} + +func (css *ClientSessionState) SetServerCertificates(ServerCertificates []*x509.Certificate) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.peerCertificates = ServerCertificates +} + +func (css *ClientSessionState) SetVerifiedChains(VerifiedChains [][]*x509.Certificate) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.verifiedChains = VerifiedChains +} + +func (css *ClientSessionState) SetUseBy(useBy uint64) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.useBy = useBy +} + +func (css *ClientSessionState) SetAgeAdd(ageAdd uint32) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.ageAdd = ageAdd +} + +// TicketKey is the internal representation of a session ticket key. +type TicketKey struct { + AesKey [16]byte + HmacKey [16]byte + // created is the time at which this ticket key was created. See Config.ticketKeys. + Created time.Time +} + +type TicketKeys []TicketKey +type ticketKeys []ticketKey + +func TicketKeyFromBytes(b [32]byte) TicketKey { + // [uTLS] + // empty config is required + config := &Config{} + tk := config.ticketKeyFromBytes(b) + return tk.ToPublic() +} + +func (tk ticketKey) ToPublic() TicketKey { + return TicketKey{ + AesKey: tk.aesKey, + HmacKey: tk.hmacKey, + Created: tk.created, + } +} + +func (TK TicketKey) ToPrivate() ticketKey { + return ticketKey{ + aesKey: TK.AesKey, + hmacKey: TK.HmacKey, + created: TK.Created, + } +} + +func (tks ticketKeys) ToPublic() []TicketKey { + var TKS []TicketKey + for _, ks := range tks { + TKS = append(TKS, ks.ToPublic()) + } + return TKS +} + +func (TKS TicketKeys) ToPrivate() []ticketKey { + var tks []ticketKey + for _, TK := range TKS { + tks = append(tks, TK.ToPrivate()) + } + return tks +} + +type kemPrivateKey struct { + secretKey any + curveID CurveID +} + +// Deprecated: Use KeySharePrivateKeys instead. This type is no longer used. +// Will be removed in the future. +type KemPrivateKey struct { + SecretKey any + CurveID CurveID +} + +func (kpk *KemPrivateKey) ToPrivate() *kemPrivateKey { + if kpk == nil { + return nil + } else { + return &kemPrivateKey{ + secretKey: kpk.SecretKey, + curveID: kpk.CurveID, + } + } +} + +func (kpk *kemPrivateKey) ToPublic() *KemPrivateKey { + if kpk == nil { + return nil + } else { + return &KemPrivateKey{ + SecretKey: kpk.secretKey, + CurveID: kpk.curveID, + } + } +} + +type KeySharePrivateKeys struct { + CurveID CurveID + Ecdhe *ecdh.PrivateKey + Mlkem *mlkem.DecapsulationKey768 + MlkemEcdhe *ecdh.PrivateKey +} + +func (ksp *KeySharePrivateKeys) ToPrivate() *keySharePrivateKeys { + if ksp == nil { + return nil + } + return &keySharePrivateKeys{ + curveID: ksp.CurveID, + ecdhe: ksp.Ecdhe, + mlkem: ksp.Mlkem, + mlkemEcdhe: ksp.MlkemEcdhe, + } +} + +func (ksp *keySharePrivateKeys) ToPublic() *KeySharePrivateKeys { + if ksp == nil { + return nil + } + return &KeySharePrivateKeys{ + CurveID: ksp.curveID, + Ecdhe: ksp.ecdhe, + Mlkem: ksp.mlkem, + MlkemEcdhe: ksp.mlkemEcdhe, + } +} diff --git a/backend/vendor/github.com/enetx/utls/u_quic.go b/backend/vendor/github.com/enetx/utls/u_quic.go new file mode 100644 index 0000000..e985c82 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_quic.go @@ -0,0 +1,212 @@ +// Copyright 2023 The uTLS Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "context" + "errors" + "fmt" +) + +// A UQUICConn represents a connection which uses a QUIC implementation as the underlying +// transport as described in RFC 9001. +// +// Methods of UQUICConn are not safe for concurrent use. +type UQUICConn struct { + conn *UConn + + sessionTicketSent bool +} + +// QUICClient returns a new TLS client side connection using QUICTransport as the +// underlying transport. The config cannot be nil. +// +// The config's MinVersion must be at least TLS 1.3. +func UQUICClient(config *QUICConfig, clientHelloID ClientHelloID) *UQUICConn { + return newUQUICConn(UClient(nil, config.TLSConfig, clientHelloID)) +} + +func newUQUICConn(uconn *UConn) *UQUICConn { + uconn.quic = &quicState{ + signalc: make(chan struct{}), + blockedc: make(chan struct{}), + } + uconn.quic.events = uconn.quic.eventArr[:0] + return &UQUICConn{ + conn: uconn, + } +} + +// Start starts the client or server handshake protocol. +// It may produce connection events, which may be read with NextEvent. +// +// Start must be called at most once. +func (q *UQUICConn) Start(ctx context.Context) error { + if q.conn.quic.started { + return quicError(errors.New("tls: Start called more than once")) + } + q.conn.quic.started = true + if q.conn.config.MinVersion < VersionTLS13 { + return quicError(errors.New("tls: Config MinVersion must be at least TLS 1.13")) + } + go q.conn.HandshakeContext(ctx) + if _, ok := <-q.conn.quic.blockedc; !ok { + return q.conn.handshakeErr + } + return nil +} + +func (q *UQUICConn) ApplyPreset(p *ClientHelloSpec) error { + return q.conn.ApplyPreset(p) +} + +// NextEvent returns the next event occurring on the connection. +// It returns an event with a Kind of QUICNoEvent when no events are available. +func (q *UQUICConn) NextEvent() QUICEvent { + qs := q.conn.quic + if last := qs.nextEvent - 1; last >= 0 && len(qs.events[last].Data) > 0 { + // Write over some of the previous event's data, + // to catch callers erroniously retaining it. + qs.events[last].Data[0] = 0 + } + if qs.nextEvent >= len(qs.events) { + qs.events = qs.events[:0] + qs.nextEvent = 0 + return QUICEvent{Kind: QUICNoEvent} + } + e := qs.events[qs.nextEvent] + qs.events[qs.nextEvent] = QUICEvent{} // zero out references to data + qs.nextEvent++ + return e +} + +// Close closes the connection and stops any in-progress handshake. +func (q *UQUICConn) Close() error { + if q.conn.quic.cancel == nil { + return nil // never started + } + q.conn.quic.cancel() + for range q.conn.quic.blockedc { + // Wait for the handshake goroutine to return. + } + return q.conn.handshakeErr +} + +// HandleData handles handshake bytes received from the peer. +// It may produce connection events, which may be read with NextEvent. +func (q *UQUICConn) HandleData(level QUICEncryptionLevel, data []byte) error { + c := q.conn + if c.in.level != level { + return quicError(c.in.setErrorLocked(errors.New("tls: handshake data received at wrong level"))) + } + c.quic.readbuf = data + <-c.quic.signalc + _, ok := <-c.quic.blockedc + if ok { + // The handshake goroutine is waiting for more data. + return nil + } + // The handshake goroutine has exited. + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + c.hand.Write(c.quic.readbuf) + c.quic.readbuf = nil + for q.conn.hand.Len() >= 4 && q.conn.handshakeErr == nil { + b := q.conn.hand.Bytes() + n := int(b[1])<<16 | int(b[2])<<8 | int(b[3]) + if n > maxHandshake { + q.conn.handshakeErr = fmt.Errorf("tls: handshake message of length %d bytes exceeds maximum of %d bytes", n, maxHandshake) + break + } + if len(b) < 4+n { + return nil + } + if err := q.conn.handlePostHandshakeMessage(); err != nil { + q.conn.handshakeErr = err + } + } + if q.conn.handshakeErr != nil { + return quicError(q.conn.handshakeErr) + } + return nil +} + +// SendSessionTicket sends a session ticket to the client. +// It produces connection events, which may be read with NextEvent. +// Currently, it can only be called once. +func (q *UQUICConn) SendSessionTicket(opts QUICSessionTicketOptions) error { + c := q.conn + if !c.isHandshakeComplete.Load() { + return quicError(errors.New("tls: SendSessionTicket called before handshake completed")) + } + if c.isClient { + return quicError(errors.New("tls: SendSessionTicket called on the client")) + } + if q.sessionTicketSent { + return quicError(errors.New("tls: SendSessionTicket called multiple times")) + } + q.sessionTicketSent = true + return quicError(c.sendSessionTicket(opts.EarlyData, opts.Extra)) +} + +// ConnectionState returns basic TLS details about the connection. +func (q *UQUICConn) ConnectionState() ConnectionState { + return q.conn.ConnectionState() +} + +// SetTransportParameters sets the transport parameters to send to the peer. +// +// Server connections may delay setting the transport parameters until after +// receiving the client's transport parameters. See QUICTransportParametersRequired. +func (q *UQUICConn) SetTransportParameters(params []byte) { + if params == nil { + params = []byte{} + } + q.conn.quic.transportParams = params // this won't be used for building ClientHello when using a preset + + // // instead, we set the transport parameters hold by the ClientHello + // for _, ext := range q.conn.Extensions { + // if qtp, ok := ext.(*QUICTransportParametersExtension); ok { + // qtp.TransportParametersExtData = params + // } + // } + + if q.conn.quic.started { + <-q.conn.quic.signalc + <-q.conn.quic.blockedc + } +} + +func (uc *UConn) QUICSetReadSecret(level QUICEncryptionLevel, suite uint16, secret []byte) { + uc.quic.events = append(uc.quic.events, QUICEvent{ + Kind: QUICSetReadSecret, + Level: level, + Suite: suite, + Data: secret, + }) +} + +func (uc *UConn) QUICSetWriteSecret(level QUICEncryptionLevel, suite uint16, secret []byte) { + uc.quic.events = append(uc.quic.events, QUICEvent{ + Kind: QUICSetWriteSecret, + Level: level, + Suite: suite, + Data: secret, + }) +} + +func (uc *UConn) QUICGetTransportParameters() ([]byte, error) { + if uc.quic.transportParams == nil { + uc.quic.events = append(uc.quic.events, QUICEvent{ + Kind: QUICTransportParametersRequired, + }) + } + for uc.quic.transportParams == nil { + if err := uc.quicWaitForSignal(); err != nil { + return nil, err + } + } + return uc.quic.transportParams, nil +} diff --git a/backend/vendor/github.com/enetx/utls/u_quic_transport_parameters.go b/backend/vendor/github.com/enetx/utls/u_quic_transport_parameters.go new file mode 100644 index 0000000..a834946 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_quic_transport_parameters.go @@ -0,0 +1,319 @@ +package tls + +import ( + "crypto/rand" + "encoding/binary" + "math" + "math/big" + + "github.com/enetx/utls/internal/quicvarint" +) + +const ( + // RFC IDs + max_idle_timeout uint64 = 0x1 + max_udp_payload_size uint64 = 0x3 + initial_max_data uint64 = 0x4 + initial_max_stream_data_bidi_local uint64 = 0x5 + initial_max_stream_data_bidi_remote uint64 = 0x6 + initial_max_stream_data_uni uint64 = 0x7 + initial_max_streams_bidi uint64 = 0x8 + initial_max_streams_uni uint64 = 0x9 + max_ack_delay uint64 = 0xb + disable_active_migration uint64 = 0xc + active_connection_id_limit uint64 = 0xe + initial_source_connection_id uint64 = 0xf + version_information uint64 = 0x11 // RFC 9368 + padding uint64 = 0x15 + max_datagram_frame_size uint64 = 0x20 // RFC 9221 + grease_quic_bit uint64 = 0x2ab2 + + // Legacy IDs from draft + version_information_legacy uint64 = 0xff73db // draft-ietf-quic-version-negotiation-13 and early +) + +type TransportParameters []TransportParameter + +func (tps TransportParameters) Marshal() []byte { + var b []byte + for _, tp := range tps { + b = quicvarint.Append(b, tp.ID()) + b = quicvarint.Append(b, uint64(len(tp.Value()))) + b = append(b, tp.Value()...) + } + return b +} + +// TransportParameter represents a QUIC transport parameter. +// +// Caller will write the following to the wire: +// +// var b []byte +// b = quicvarint.Append(b, ID()) +// b = quicvarint.Append(b, len(Value())) +// b = append(b, Value()) +// +// Therefore Value() should return the exact bytes to be written to the wire AFTER the length field, +// i.e., the bytes MAY be a Variable Length Integer per RFC depending on the type of the transport +// parameter, but MUST NOT including the length field unless the parameter is defined so. +type TransportParameter interface { + ID() uint64 + Value() []byte +} + +type GREASETransportParameter struct { + IdOverride uint64 // if set to a valid GREASE ID, use this instead of randomly generated one. + Length uint16 // if len(ValueOverride) == 0, will generate random data of this size. + ValueOverride []byte // if len(ValueOverride) > 0, use this instead of random bytes. +} + +const ( + GREASE_MAX_MULTIPLIER = (0x3FFFFFFFFFFFFFFF - 27) / 31 +) + +// IsGREASEID returns true if id is a valid GREASE ID for +// transport parameters. +func (GREASETransportParameter) IsGREASEID(id uint64) bool { + return id >= 27 && (id-27)%31 == 0 +} + +// GetGREASEID returns a random valid GREASE ID for transport parameters. +func (GREASETransportParameter) GetGREASEID() uint64 { + max := big.NewInt(GREASE_MAX_MULTIPLIER) + + randMultiply, err := rand.Int(rand.Reader, max) + if err != nil { + return 27 + } + + return 27 + randMultiply.Uint64()*31 +} + +func (g *GREASETransportParameter) ID() uint64 { + if !g.IsGREASEID(g.IdOverride) { + g.IdOverride = g.GetGREASEID() + } + return g.IdOverride +} + +func (g *GREASETransportParameter) Value() []byte { + if len(g.ValueOverride) == 0 { + g.ValueOverride = make([]byte, g.Length) + rand.Read(g.ValueOverride) + } + return g.ValueOverride +} + +type MaxIdleTimeout uint64 // in milliseconds + +func (MaxIdleTimeout) ID() uint64 { + return max_idle_timeout +} + +func (m MaxIdleTimeout) Value() []byte { + return quicvarint.Append([]byte{}, uint64(m)) +} + +type MaxUDPPayloadSize uint64 + +func (MaxUDPPayloadSize) ID() uint64 { + return max_udp_payload_size +} + +func (m MaxUDPPayloadSize) Value() []byte { + return quicvarint.Append([]byte{}, uint64(m)) +} + +type InitialMaxData uint64 + +func (InitialMaxData) ID() uint64 { + return initial_max_data +} + +func (i InitialMaxData) Value() []byte { + return quicvarint.Append([]byte{}, uint64(i)) +} + +type InitialMaxStreamDataBidiLocal uint64 + +func (InitialMaxStreamDataBidiLocal) ID() uint64 { + return initial_max_stream_data_bidi_local +} + +func (i InitialMaxStreamDataBidiLocal) Value() []byte { + return quicvarint.Append([]byte{}, uint64(i)) +} + +type InitialMaxStreamDataBidiRemote uint64 + +func (InitialMaxStreamDataBidiRemote) ID() uint64 { + return initial_max_stream_data_bidi_remote +} + +func (i InitialMaxStreamDataBidiRemote) Value() []byte { + return quicvarint.Append([]byte{}, uint64(i)) +} + +type InitialMaxStreamDataUni uint64 + +func (InitialMaxStreamDataUni) ID() uint64 { + return initial_max_stream_data_uni +} + +func (i InitialMaxStreamDataUni) Value() []byte { + return quicvarint.Append([]byte{}, uint64(i)) +} + +type InitialMaxStreamsBidi uint64 + +func (InitialMaxStreamsBidi) ID() uint64 { + return initial_max_streams_bidi +} + +func (i InitialMaxStreamsBidi) Value() []byte { + return quicvarint.Append([]byte{}, uint64(i)) +} + +type InitialMaxStreamsUni uint64 + +func (InitialMaxStreamsUni) ID() uint64 { + return initial_max_streams_uni +} + +func (i InitialMaxStreamsUni) Value() []byte { + return quicvarint.Append([]byte{}, uint64(i)) +} + +type MaxAckDelay uint64 + +func (MaxAckDelay) ID() uint64 { + return max_ack_delay +} + +func (m MaxAckDelay) Value() []byte { + return quicvarint.Append([]byte{}, uint64(m)) +} + +type DisableActiveMigration struct{} + +func (*DisableActiveMigration) ID() uint64 { + return disable_active_migration +} + +// Its Value MUST ALWAYS be empty. +func (*DisableActiveMigration) Value() []byte { + return []byte{} +} + +type ActiveConnectionIDLimit uint64 + +func (ActiveConnectionIDLimit) ID() uint64 { + return active_connection_id_limit +} + +func (a ActiveConnectionIDLimit) Value() []byte { + return quicvarint.Append([]byte{}, uint64(a)) +} + +type InitialSourceConnectionID []byte // if empty, will be set to the Connection ID used for the Initial packet. + +func (InitialSourceConnectionID) ID() uint64 { + return initial_source_connection_id +} + +func (i InitialSourceConnectionID) Value() []byte { + return []byte(i) +} + +type VersionInformation struct { + ChoosenVersion uint32 + AvailableVersions []uint32 // Also known as "Other Versions" in early drafts. + + LegacyID bool // If true, use the legacy-assigned ID (0xff73db) instead of the RFC-assigned one (0x11). +} + +const ( + VERSION_NEGOTIATION uint32 = 0x00000000 // rfc9000 + VERSION_1 uint32 = 0x00000001 // rfc9000 + VERSION_2 uint32 = 0x6b3343cf // rfc9369 + + VERSION_GREASE uint32 = 0x0a0a0a0a // -> 0x?a?a?a?a +) + +func (v *VersionInformation) ID() uint64 { + if v.LegacyID { + return version_information_legacy + } + return version_information +} + +func (v *VersionInformation) Value() []byte { + var b []byte + b = binary.BigEndian.AppendUint32(b, v.ChoosenVersion) + for _, version := range v.AvailableVersions { + if version != VERSION_GREASE { + b = binary.BigEndian.AppendUint32(b, version) + } else { + b = binary.BigEndian.AppendUint32(b, v.GetGREASEVersion()) + } + } + return b +} + +func (*VersionInformation) GetGREASEVersion() uint32 { + // get a random uint32 + max := big.NewInt(math.MaxUint32) + randVal, err := rand.Int(rand.Reader, max) + if err != nil { + return VERSION_GREASE + } + + return uint32(randVal.Uint64()&math.MaxUint32) | 0x0a0a0a0a // all GREASE versions are in 0x?a?a?a?a +} + +type PaddingTransportParameter []byte + +func (PaddingTransportParameter) ID() uint64 { + return padding +} + +func (p PaddingTransportParameter) Value() []byte { + return p +} + +type MaxDatagramFrameSize uint64 + +func (MaxDatagramFrameSize) ID() uint64 { + return max_datagram_frame_size +} + +func (m MaxDatagramFrameSize) Value() []byte { + return quicvarint.Append([]byte{}, uint64(m)) +} + +type GREASEQUICBit struct{} + +func (*GREASEQUICBit) ID() uint64 { + return grease_quic_bit +} + +// Its Value MUST ALWAYS be empty. +func (*GREASEQUICBit) Value() []byte { + return []byte{} +} + +type FakeQUICTransportParameter struct { + Id uint64 + Val []byte +} + +func (f *FakeQUICTransportParameter) ID() uint64 { + if f.Id == 0 { + panic("it is not allowed to use a FakeQUICTransportParameter without setting the ID") + } + return f.Id +} + +func (f *FakeQUICTransportParameter) Value() []byte { + return f.Val +} diff --git a/backend/vendor/github.com/enetx/utls/u_roller.go b/backend/vendor/github.com/enetx/utls/u_roller.go new file mode 100644 index 0000000..a1c5291 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_roller.go @@ -0,0 +1,100 @@ +package tls + +import ( + "net" + "sync" + "time" +) + +type Roller struct { + HelloIDs []ClientHelloID + HelloIDMu sync.Mutex + WorkingHelloID *ClientHelloID + TcpDialTimeout time.Duration + TlsHandshakeTimeout time.Duration + r *prng +} + +// NewRoller creates Roller object with default range of HelloIDs to cycle through until a +// working/unblocked one is found. +func NewRoller() (*Roller, error) { + r, err := newPRNG() + if err != nil { + return nil, err + } + + tcpDialTimeoutInc := r.Intn(14) + tcpDialTimeoutInc = 7 + tcpDialTimeoutInc + + tlsHandshakeTimeoutInc := r.Intn(20) + tlsHandshakeTimeoutInc = 11 + tlsHandshakeTimeoutInc + + return &Roller{ + HelloIDs: []ClientHelloID{ + HelloChrome_Auto, + HelloFirefox_Auto, + HelloIOS_Auto, + HelloRandomized, + }, + TcpDialTimeout: time.Second * time.Duration(tcpDialTimeoutInc), + TlsHandshakeTimeout: time.Second * time.Duration(tlsHandshakeTimeoutInc), + r: r, + }, nil +} + +// Dial attempts to establish connection to given address using different HelloIDs. +// If a working HelloID is found, it is used again for subsequent Dials. +// If tcp connection fails or all HelloIDs are tried, returns with last error. +// +// Usage examples: +// Dial("tcp4", "google.com:443", "google.com") +// Dial("tcp", "10.23.144.22:443", "mywebserver.org") +func (c *Roller) Dial(network, addr, serverName string) (*UConn, error) { + helloIDs := make([]ClientHelloID, len(c.HelloIDs)) + copy(helloIDs, c.HelloIDs) + c.r.rand.Shuffle(len(c.HelloIDs), func(i, j int) { + helloIDs[i], helloIDs[j] = helloIDs[j], helloIDs[i] + }) + + c.HelloIDMu.Lock() + workingHelloId := c.WorkingHelloID // keep using same helloID, if it works + c.HelloIDMu.Unlock() + if workingHelloId != nil { + helloIDFound := false + for i, ID := range helloIDs { + if ID == *workingHelloId { + helloIDs[i] = helloIDs[0] + helloIDs[0] = *workingHelloId // push working hello ID first + helloIDFound = true + break + } + } + if !helloIDFound { + helloIDs = append([]ClientHelloID{*workingHelloId}, helloIDs...) + } + } + + var tcpConn net.Conn + var err error + for _, helloID := range helloIDs { + tcpConn, err = net.DialTimeout(network, addr, c.TcpDialTimeout) + if err != nil { + return nil, err // on tcp Dial failure return with error right away + } + + client := UClient(tcpConn, nil, helloID) + client.SetSNI(serverName) + client.SetDeadline(time.Now().Add(c.TlsHandshakeTimeout)) + err = client.Handshake() + client.SetDeadline(time.Time{}) // unset timeout + if err != nil { + continue // on tls Dial error keep trying HelloIDs + } + + c.HelloIDMu.Lock() + c.WorkingHelloID = &client.ClientHelloID + c.HelloIDMu.Unlock() + return client, err + } + return nil, err +} diff --git a/backend/vendor/github.com/enetx/utls/u_session_controller.go b/backend/vendor/github.com/enetx/utls/u_session_controller.go new file mode 100644 index 0000000..7daff84 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_session_controller.go @@ -0,0 +1,361 @@ +package tls + +import ( + "errors" + "fmt" + + "github.com/enetx/utls/internal/tls13" +) + +// Tracking the state of calling conn.loadSession +type LoadSessionTrackerState int + +const NeverCalled LoadSessionTrackerState = 0 +const UtlsAboutToCall LoadSessionTrackerState = 1 +const CalledByULoadSession LoadSessionTrackerState = 2 +const CalledByGoTLS LoadSessionTrackerState = 3 + +// The state of the session controller +type sessionControllerState int + +const NoSession sessionControllerState = 0 +const SessionTicketExtInitialized sessionControllerState = 1 +const SessionTicketExtAllSet sessionControllerState = 2 +const PskExtInitialized sessionControllerState = 3 +const PskExtAllSet sessionControllerState = 4 + +// sessionController is responsible for managing and controlling all session related states. It manages the lifecycle of the session ticket extension and the psk extension, including initialization, removal if the client hello spec doesn't contain any of them, and setting the prepared state to the client hello. +// +// Users should never directly modify the underlying state. Violations will result in undefined behaviors. +// +// Users should never construct sessionController by themselves, use the function `newSessionController` instead. +type sessionController struct { + // sessionTicketExt logically owns the session ticket extension + sessionTicketExt ISessionTicketExtension + + // pskExtension logically owns the psk extension + pskExtension PreSharedKeyExtension + + // uconnRef is a reference to the uconn + uconnRef *UConn + + // state represents the internal state of the sessionController. Users are advised to modify the state only through designated methods and avoid direct manipulation, as doing so may result in undefined behavior. + state sessionControllerState + + // loadSessionTracker keeps track of how the conn.loadSession method is being utilized. + loadSessionTracker LoadSessionTrackerState + + // callingLoadSession is a boolean flag that indicates whether the `conn.loadSession` function is currently being invoked. + callingLoadSession bool + + // locked is a boolean flag that becomes true once all states are appropriately set. Once `locked` is true, further modifications are disallowed, except for the binders. + locked bool +} + +// newSessionController constructs a new SessionController +func newSessionController(uconn *UConn) *sessionController { + return &sessionController{ + uconnRef: uconn, + sessionTicketExt: nil, + pskExtension: nil, + state: NoSession, + locked: false, + callingLoadSession: false, + loadSessionTracker: NeverCalled, + } +} + +func (s *sessionController) isSessionLocked() bool { + return s.locked +} + +type shouldLoadSessionResult int + +const shouldReturn shouldLoadSessionResult = 0 +const shouldSetTicket shouldLoadSessionResult = 1 +const shouldSetPsk shouldLoadSessionResult = 2 +const shouldLoad shouldLoadSessionResult = 3 + +// shouldLoadSession determines the appropriate action to take when it is time to load the session for the clientHello. +// There are several possible scenarios: +// - If a session ticket is already initialized, typically via the `initSessionTicketExt()` function, the ticket should be set in the client hello. +// - If a pre-shared key (PSK) is already initialized, typically via the `overridePskExt()` function, the PSK should be set in the client hello. +// - If both the `sessionTicketExt` and `pskExtension` are nil, which might occur if the client hello spec does not include them, we should skip the loadSession(). +// - In all other cases, the function proceeds to load the session. +func (s *sessionController) shouldLoadSession() shouldLoadSessionResult { + if s.sessionTicketExt == nil && s.pskExtension == nil || s.uconnRef.clientHelloBuildStatus != NotBuilt { + // No need to load session since we don't have the related extensions. + return shouldReturn + } + if s.state == SessionTicketExtInitialized { + return shouldSetTicket + } + if s.state == PskExtInitialized { + return shouldSetPsk + } + return shouldLoad +} + +// utlsAboutToLoadSession updates the loadSessionTracker to `UtlsAboutToCall` to signal the initiation of a session loading operation, +// provided that the preconditions are met. If the preconditions are not met (due to incorrect utls implementation), this function triggers a panic. +func (s *sessionController) utlsAboutToLoadSession() { + uAssert(s.state == NoSession && !s.locked, "tls: aboutToLoadSession failed: must only load session when the session of the client hello is not locked and when there's currently no session") + s.loadSessionTracker = UtlsAboutToCall +} + +func (s *sessionController) assertHelloNotBuilt(caller string) { + if s.uconnRef.clientHelloBuildStatus != NotBuilt { + panic(fmt.Sprintf("tls: %s failed: we can't modify the session after the clientHello is built", caller)) + } +} + +func (s *sessionController) assertControllerState(caller string, desired sessionControllerState, moreDesiredStates ...sessionControllerState) { + if s.state != desired && !anyTrue(moreDesiredStates, func(_ int, state *sessionControllerState) bool { + return s.state == *state + }) { + panic(fmt.Sprintf("tls: %s failed: undesired controller state %d", caller, s.state)) + } +} + +func (s *sessionController) assertNotLocked(caller string) { + if s.locked { + panic(fmt.Sprintf("tls: %s failed: you must not modify the session after it's locked", caller)) + } +} + +func (s *sessionController) assertCanSkip(caller, extensionName string) { + if !s.uconnRef.skipResumptionOnNilExtension { + panic(fmt.Sprintf("tls: %s failed: session resumption is enabled, but there is no %s in the ClientHelloSpec; Please consider provide one in the ClientHelloSpec; If this is intentional, you may consider disable resumption by setting Config.SessionTicketsDisabled to true, or set Config.PreferSkipResumptionOnNilExtension to true to suppress this exception", caller, extensionName)) + } +} + +// finalCheck performs a comprehensive check on the updated state to ensure the correctness of the changes. +// If the checks pass successfully, the sessionController's state will be locked. +// Any failure in passing the tests indicates incorrect implementations in the utls, which will result in triggering a panic. +// Refer to the documentation for the `locked` field for more detailed information. +func (s *sessionController) finalCheck() { + s.assertControllerState("SessionController.finalCheck", PskExtAllSet, SessionTicketExtAllSet, NoSession) + s.locked = true +} + +func initializationGuard[E Initializable, I func(E)](extension E, initializer I) { + uAssert(!extension.IsInitialized(), "tls: initialization failed: the extension is already initialized") + initializer(extension) + uAssert(extension.IsInitialized(), "tls: initialization failed: the extension is not initialized after initialization") +} + +// initSessionTicketExt initializes the ticket and sets the state to `TicketInitialized`. +func (s *sessionController) initSessionTicketExt(session *SessionState, ticket []byte) { + s.assertNotLocked("initSessionTicketExt") + s.assertHelloNotBuilt("initSessionTicketExt") + s.assertControllerState("initSessionTicketExt", NoSession) + panicOnNil("initSessionTicketExt", session, ticket) + if s.sessionTicketExt == nil { + s.assertCanSkip("initSessionTicketExt", "session ticket extension") + return + } + initializationGuard(s.sessionTicketExt, func(e ISessionTicketExtension) { + s.sessionTicketExt.InitializeByUtls(session, ticket) + }) + s.state = SessionTicketExtInitialized +} + +// initPSK initializes the PSK extension using a valid session. The PSK extension +// should not be initialized previously, and the parameters must not be nil; +// otherwise, this function will trigger a panic. +func (s *sessionController) initPskExt(session *SessionState, earlySecret *tls13.EarlySecret, binderKey []byte, pskIdentities []pskIdentity) { + s.assertNotLocked("initPskExt") + s.assertHelloNotBuilt("initPskExt") + s.assertControllerState("initPskExt", NoSession) + panicOnNil("initPskExt", session, earlySecret, pskIdentities) + if s.pskExtension == nil { + s.assertCanSkip("initPskExt", "pre-shared key extension") + return + } + initializationGuard(s.pskExtension, func(e PreSharedKeyExtension) { + publicPskIdentities := mapSlice(pskIdentities, func(private pskIdentity) PskIdentity { + return PskIdentity{ + Label: private.label, + ObfuscatedTicketAge: private.obfuscatedTicketAge, + } + }) + e.InitializeByUtls(session, earlySecret.Secret(), binderKey, publicPskIdentities) + }) + + s.state = PskExtInitialized +} + +// setSessionTicketToUConn write the ticket states from the session ticket extension to the client hello and handshake state. +func (s *sessionController) setSessionTicketToUConn() { + uAssert(s.sessionTicketExt != nil && s.state == SessionTicketExtInitialized, "tls: setSessionTicketExt failed: invalid state") + s.uconnRef.HandshakeState.Session = s.sessionTicketExt.GetSession() + s.uconnRef.HandshakeState.Hello.SessionTicket = s.sessionTicketExt.GetTicket() + s.state = SessionTicketExtAllSet +} + +// setPskToUConn sets the psk to the handshake state and client hello. +func (s *sessionController) setPskToUConn() { + uAssert(s.pskExtension != nil && (s.state == PskExtInitialized || s.state == PskExtAllSet), "tls: setPskToUConn failed: invalid state") + pskCommon := s.pskExtension.GetPreSharedKeyCommon() + if s.state == PskExtInitialized { + s.uconnRef.HandshakeState.State13.EarlySecret = pskCommon.EarlySecret + s.uconnRef.HandshakeState.Session = pskCommon.Session + s.uconnRef.HandshakeState.Hello.PskIdentities = pskCommon.Identities + s.uconnRef.HandshakeState.Hello.PskBinders = pskCommon.Binders + } else if s.state == PskExtAllSet { + uAssert(s.uconnRef.HandshakeState.Session == pskCommon.Session && sliceEq(s.uconnRef.HandshakeState.State13.EarlySecret, pskCommon.EarlySecret) && + allTrue(s.uconnRef.HandshakeState.Hello.PskIdentities, func(i int, psk *PskIdentity) bool { + return pskCommon.Identities[i].ObfuscatedTicketAge == psk.ObfuscatedTicketAge && sliceEq(pskCommon.Identities[i].Label, psk.Label) + }), "tls: setPskToUConn failed: only binders are allowed to change on state `PskAllSet`") + } + s.uconnRef.HandshakeState.State13.BinderKey = pskCommon.BinderKey + s.state = PskExtAllSet +} + +// shouldUpdateBinders determines whether binders should be updated based on the presence of an initialized psk extension. +// This function returns true if an initialized psk extension exists. Binders are allowed to be updated when the state is `PskAllSet`, +// as the `BuildHandshakeState` function can be called multiple times in this case. However, it's important to note that +// the session state, apart from binders, should not be altered more than once. +func (s *sessionController) shouldUpdateBinders() bool { + if s.pskExtension == nil { + return false + } + return (s.state == PskExtInitialized || s.state == PskExtAllSet) +} + +func (s *sessionController) updateBinders() { + uAssert(s.shouldUpdateBinders(), "tls: updateBinders failed: shouldn't update binders") + s.pskExtension.PatchBuiltHello(s.uconnRef.HandshakeState.Hello) +} + +func (s *sessionController) overrideExtension(extension Initializable, override func(), initializedState sessionControllerState) error { + panicOnNil("overrideExtension", extension) + s.assertNotLocked("overrideExtension") + s.assertControllerState("overrideExtension", NoSession) + override() + if extension.IsInitialized() { + s.state = initializedState + } + return nil +} + +// overridePskExt allows the user of utls to customize the psk extension. +func (s *sessionController) overridePskExt(pskExt PreSharedKeyExtension) error { + return s.overrideExtension(pskExt, func() { s.pskExtension = pskExt }, PskExtInitialized) +} + +// overridePskExt allows the user of utls to customize the session ticket extension. +func (s *sessionController) overrideSessionTicketExt(sessionTicketExt ISessionTicketExtension) error { + return s.overrideExtension(sessionTicketExt, func() { s.sessionTicketExt = sessionTicketExt }, SessionTicketExtInitialized) +} + +// syncSessionExts synchronizes the sessionController with the session-related +// extensions from the extension list after applying client hello specs. +// +// - If the extension list is missing the session ticket extension or PSK +// extension, owned extensions are dropped and states are reset. +// - If the user provides a session ticket extension or PSK extension, the +// corresponding extension from the extension list will be replaced. +// - If the user doesn't provide session-related extensions, the extensions +// from the extension list will be utilized. +// +// This function ensures that there is only one session ticket extension or PSK +// extension, and that the PSK extension is the last extension in the extension +// list. +func (s *sessionController) syncSessionExts() error { + uAssert(s.uconnRef.clientHelloBuildStatus == NotBuilt, "tls: checkSessionExts failed: we can't modify the session after the clientHello is built") + s.assertNotLocked("checkSessionExts") + s.assertHelloNotBuilt("checkSessionExts") + s.assertControllerState("checkSessionExts", NoSession, SessionTicketExtInitialized, PskExtInitialized) + numSessionExt := 0 + hasPskExt := false + for i, e := range s.uconnRef.Extensions { + switch ext := e.(type) { + case ISessionTicketExtension: + uAssert(numSessionExt == 0, "tls: checkSessionExts failed: multiple ISessionTicketExtensions in the extension list") + if s.sessionTicketExt == nil { + // If there isn't a user-provided session ticket extension, use the one from the spec + s.sessionTicketExt = ext + } else { + // Otherwise, replace the one in the extension list with the user-provided one + s.uconnRef.Extensions[i] = s.sessionTicketExt + } + numSessionExt += 1 + case PreSharedKeyExtension: + uAssert(i == len(s.uconnRef.Extensions)-1, "tls: checkSessionExts failed: PreSharedKeyExtension must be the last extension") + if s.pskExtension == nil { + // If there isn't a user-provided psk extension, use the one from the spec + s.pskExtension = ext + } else { + // Otherwise, replace the one in the extension list with the user-provided one + s.uconnRef.Extensions[i] = s.pskExtension + } + s.pskExtension.SetOmitEmptyPsk(s.uconnRef.config.OmitEmptyPsk) + hasPskExt = true + } + } + if numSessionExt == 0 { + if s.state == SessionTicketExtInitialized { + return errors.New("tls: checkSessionExts failed: the user provided a session ticket, but the specification doesn't contain one") + } + s.sessionTicketExt = nil + s.uconnRef.HandshakeState.Session = nil + s.uconnRef.HandshakeState.Hello.SessionTicket = nil + } + if !hasPskExt { + if s.state == PskExtInitialized { + return errors.New("tls: checkSessionExts failed: the user provided a psk, but the specification doesn't contain one") + } + s.pskExtension = nil + s.uconnRef.HandshakeState.State13.BinderKey = nil + s.uconnRef.HandshakeState.State13.EarlySecret = nil + s.uconnRef.HandshakeState.Session = nil + s.uconnRef.HandshakeState.Hello.PskIdentities = nil + } + return nil +} + +// onEnterLoadSessionCheck is intended to be invoked upon entering the `conn.loadSession` function. +// It is designed to ensure the correctness of the utls implementation. If the utls implementation is found to be incorrect, this function will trigger a panic. +func (s *sessionController) onEnterLoadSessionCheck() { + uAssert(!s.locked, "tls: LoadSessionCoordinator.onEnterLoadSessionCheck failed: session is set and locked, no call to loadSession is allowed") + switch s.loadSessionTracker { + case UtlsAboutToCall, NeverCalled: + s.callingLoadSession = true + case CalledByULoadSession, CalledByGoTLS: + panic("tls: LoadSessionCoordinator.onEnterLoadSessionCheck failed: you must not call loadSession() twice") + default: + panic("tls: LoadSessionCoordinator.onEnterLoadSessionCheck failed: unimplemented state") + } +} + +// onLoadSessionReturn is intended to be invoked upon returning from the `conn.loadSession` function. +// It serves as a validation step for the correctness of the underlying utls implementation. +// If the utls implementation is incorrect, this function will trigger a panic. +func (s *sessionController) onLoadSessionReturn() { + uAssert(s.callingLoadSession, "tls: LoadSessionCoordinator.onLoadSessionReturn failed: it's not loading sessions, perhaps this function is not being called by loadSession.") + switch s.loadSessionTracker { + case NeverCalled: + s.loadSessionTracker = CalledByGoTLS + case UtlsAboutToCall: + s.loadSessionTracker = CalledByULoadSession + default: + panic("tls: LoadSessionCoordinator.onLoadSessionReturn failed: unimplemented state") + } + s.callingLoadSession = false +} + +// shouldLoadSessionWriteBinders checks if `conn.loadSession` should proceed to write binders and marshal the client hello. If the utls implementation +// is incorrect, this function will trigger a panic. +func (s *sessionController) shouldLoadSessionWriteBinders() bool { + uAssert(s.callingLoadSession, "tls: shouldWriteBinders failed: LoadSessionCoordinator isn't loading sessions, perhaps this function is not being called by loadSession.") + + switch s.loadSessionTracker { + case NeverCalled: + return true + case UtlsAboutToCall: + return false + default: + panic("tls: shouldWriteBinders failed: unimplemented state") + } +} diff --git a/backend/vendor/github.com/enetx/utls/u_session_ticket.go b/backend/vendor/github.com/enetx/utls/u_session_ticket.go new file mode 100644 index 0000000..caefd06 --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_session_ticket.go @@ -0,0 +1,82 @@ +package tls + +import "io" + +type ISessionTicketExtension interface { + TLSExtension + + // If false is returned, utls will invoke `InitializeByUtls()` for the necessary initialization. + Initializable + + // InitializeByUtls is invoked when IsInitialized() returns false. + // It initializes the extension using a real and valid TLS 1.2 session. + InitializeByUtls(session *SessionState, ticket []byte) + + GetSession() *SessionState + + GetTicket() []byte +} + +// SessionTicketExtension implements session_ticket (35) +type SessionTicketExtension struct { + Session *SessionState + Ticket []byte + Initialized bool +} + +func (e *SessionTicketExtension) writeToUConn(uc *UConn) error { + // session states are handled later. At this point tickets aren't + // being loaded by utls, so don't write anything to the UConn. + uc.HandshakeState.Hello.TicketSupported = true // This doesn't really matter, this field is only used to add session ticket ext in go tls. + return nil +} + +func (e *SessionTicketExtension) Len() int { + return 4 + len(e.Ticket) +} + +func (e *SessionTicketExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + extBodyLen := e.Len() - 4 + + b[0] = byte(extensionSessionTicket >> 8) + b[1] = byte(extensionSessionTicket) + b[2] = byte(extBodyLen >> 8) + b[3] = byte(extBodyLen) + if extBodyLen > 0 { + copy(b[4:], e.Ticket) + } + return e.Len(), io.EOF +} + +func (e *SessionTicketExtension) IsInitialized() bool { + return e.Initialized +} + +func (e *SessionTicketExtension) InitializeByUtls(session *SessionState, ticket []byte) { + uAssert(!e.Initialized, "tls: InitializeByUtls failed: the SessionTicketExtension is initialized") + uAssert(session.version == VersionTLS12 && session != nil && ticket != nil, "tls: InitializeByUtls failed: the session is not a tls 1.2 session") + e.Session = session + e.Ticket = ticket + e.Initialized = true +} + +func (e *SessionTicketExtension) UnmarshalJSON(_ []byte) error { + return nil // no-op +} + +func (e *SessionTicketExtension) Write(_ []byte) (int, error) { + // RFC 5077, Section 3.2 + return 0, nil +} + +func (e *SessionTicketExtension) GetSession() *SessionState { + return e.Session +} + +func (e *SessionTicketExtension) GetTicket() []byte { + return e.Ticket +} diff --git a/backend/vendor/github.com/enetx/utls/u_tls_extensions.go b/backend/vendor/github.com/enetx/utls/u_tls_extensions.go new file mode 100644 index 0000000..ee21b5e --- /dev/null +++ b/backend/vendor/github.com/enetx/utls/u_tls_extensions.go @@ -0,0 +1,1956 @@ +// Copyright 2017 Google Inc. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "encoding/json" + "errors" + "fmt" + "io" + "strings" + + "github.com/enetx/utls/dicttls" + "golang.org/x/crypto/cryptobyte" +) + +// ExtensionFromID returns a TLSExtension for the given extension ID. +func ExtensionFromID(id uint16) TLSExtension { + // deep copy + switch id { + case extensionServerName: + return &SNIExtension{} + case extensionStatusRequest: + return &StatusRequestExtension{} + case extensionSupportedCurves: + return &SupportedCurvesExtension{} + case extensionSupportedPoints: + return &SupportedPointsExtension{} + case extensionSignatureAlgorithms: + return &SignatureAlgorithmsExtension{} + case extensionALPN: + return &ALPNExtension{} + case extensionStatusRequestV2: + return &StatusRequestV2Extension{} + case extensionSCT: + return &SCTExtension{} + case utlsExtensionPadding: + return &UtlsPaddingExtension{} + case extensionExtendedMasterSecret: + return &ExtendedMasterSecretExtension{} + case fakeExtensionTokenBinding: + return &FakeTokenBindingExtension{} + case utlsExtensionCompressCertificate: + return &UtlsCompressCertExtension{} + case fakeRecordSizeLimit: + return &FakeRecordSizeLimitExtension{} + case fakeExtensionDelegatedCredentials: + return &FakeDelegatedCredentialsExtension{} + case extensionSessionTicket: + return &SessionTicketExtension{} + case extensionPreSharedKey: + return (PreSharedKeyExtension)(&FakePreSharedKeyExtension{}) // To use the result, caller needs further inspection to decide between Fake or Utls. + // case extensionEarlyData: + // return &EarlyDataExtension{} + case extensionSupportedVersions: + return &SupportedVersionsExtension{} + // case extensionCookie: + // return &CookieExtension{} + case extensionPSKModes: + return &PSKKeyExchangeModesExtension{} + // case extensionCertificateAuthorities: + // return &CertificateAuthoritiesExtension{} + case extensionSignatureAlgorithmsCert: + return &SignatureAlgorithmsCertExtension{} + case extensionKeyShare: + return &KeyShareExtension{} + case extensionQUICTransportParameters: + return &QUICTransportParametersExtension{} + case extensionNextProtoNeg: + return &NPNExtension{} + case utlsExtensionApplicationSettings: + return &ApplicationSettingsExtension{} + case utlsExtensionApplicationSettingsNew: + return &ApplicationSettingsExtensionNew{} + case fakeOldExtensionChannelID: + return &FakeChannelIDExtension{true} + case fakeExtensionChannelID: + return &FakeChannelIDExtension{} + case utlsExtensionECH: + return &GREASEEncryptedClientHelloExtension{} + case extensionRenegotiationInfo: + return &RenegotiationInfoExtension{} + default: + if isGREASEUint16(id) { + return &UtlsGREASEExtension{} + } + return nil // not returning GenericExtension, it should be handled by caller + } +} + +type TLSExtension interface { + writeToUConn(*UConn) error + + Len() int // includes header + + // Read reads up to len(p) bytes into p. + // It returns the number of bytes read (0 <= n <= len(p)) and any error encountered. + Read(p []byte) (n int, err error) // implements io.Reader +} + +// TLSExtensionWriter is an interface allowing a TLS extension to be +// auto-constucted/recovered by reading in a byte stream. +type TLSExtensionWriter interface { + TLSExtension + + // Write writes the extension data as a byte slice, up to len(b) bytes from b. + // It returns the number of bytes written (0 <= n <= len(b)) and any error encountered. + // + // The implementation MUST NOT silently drop data if consumed less than len(b) bytes, + // instead, it MUST return an error. + Write(b []byte) (n int, err error) +} + +type TLSExtensionJSON interface { + TLSExtension + + // UnmarshalJSON unmarshals the JSON-encoded data into the extension. + UnmarshalJSON([]byte) error +} + +// SNIExtension implements server_name (0) +type SNIExtension struct { + ServerName string // not an array because go crypto/tls doesn't support multiple SNIs +} + +func (e *SNIExtension) Len() int { + // Literal IP addresses, absolute FQDNs, and empty strings are not permitted as SNI values. + // See RFC 6066, Section 3. + hostName := hostnameInSNI(e.ServerName) + if len(hostName) == 0 { + return 0 + } + return 4 + 2 + 1 + 2 + len(hostName) +} + +func (e *SNIExtension) Read(b []byte) (int, error) { + // Literal IP addresses, absolute FQDNs, and empty strings are not permitted as SNI values. + // See RFC 6066, Section 3. + hostName := hostnameInSNI(e.ServerName) + if len(hostName) == 0 { + return 0, io.EOF + } + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // RFC 3546, section 3.1 + b[0] = byte(extensionServerName >> 8) + b[1] = byte(extensionServerName) + b[2] = byte((len(hostName) + 5) >> 8) + b[3] = byte(len(hostName) + 5) + b[4] = byte((len(hostName) + 3) >> 8) + b[5] = byte(len(hostName) + 3) + // b[6] Server Name Type: host_name (0) + b[7] = byte(len(hostName) >> 8) + b[8] = byte(len(hostName)) + copy(b[9:], []byte(hostName)) + return e.Len(), io.EOF +} + +func (e *SNIExtension) UnmarshalJSON(_ []byte) error { + return nil // no-op +} + +// Write is a no-op for StatusRequestExtension. +// SNI should not be fingerprinted and is user controlled. +func (e *SNIExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 6066, Section 3 + var nameList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&nameList) || nameList.Empty() { + return fullLen, errors.New("unable to read server name extension data") + } + var serverName string + for !nameList.Empty() { + var nameType uint8 + var serverNameBytes cryptobyte.String + if !nameList.ReadUint8(&nameType) || + !nameList.ReadUint16LengthPrefixed(&serverNameBytes) || + serverNameBytes.Empty() { + return fullLen, errors.New("unable to read server name extension data") + } + if nameType != 0 { + continue + } + if len(serverName) != 0 { + return fullLen, errors.New("multiple names of the same name_type in server name extension are prohibited") + } + serverName = string(serverNameBytes) + if strings.HasSuffix(serverName, ".") { + return fullLen, errors.New("SNI value may not include a trailing dot") + } + } + // clientHelloSpec.Extensions = append(clientHelloSpec.Extensions, &SNIExtension{}) // gaukas moved this line out from the loop. + + // don't copy SNI from ClientHello to ClientHelloSpec! + return fullLen, nil +} + +func (e *SNIExtension) writeToUConn(uc *UConn) error { + if uc.config.EncryptedClientHelloConfigList == nil { // with ech, e.ServerName is the outer public name and should not be copied + uc.config.ServerName = e.ServerName + } + hostName := hostnameInSNI(e.ServerName) + uc.HandshakeState.Hello.ServerName = hostName + + return nil +} + +// StatusRequestExtension implements status_request (5) +type StatusRequestExtension struct { +} + +func (e *StatusRequestExtension) Len() int { + return 9 +} + +func (e *StatusRequestExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // RFC 4366, section 3.6 + b[0] = byte(extensionStatusRequest >> 8) + b[1] = byte(extensionStatusRequest) + b[2] = 0 + b[3] = 5 + b[4] = 1 // OCSP type + // Two zero valued uint16s for the two lengths. + return e.Len(), io.EOF +} + +func (e *StatusRequestExtension) UnmarshalJSON(_ []byte) error { + return nil // no-op +} + +// Write is a no-op for StatusRequestExtension. No data for this extension. +func (e *StatusRequestExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 4366, Section 3.6 + var statusType uint8 + var ignored cryptobyte.String + if !extData.ReadUint8(&statusType) || + !extData.ReadUint16LengthPrefixed(&ignored) || + !extData.ReadUint16LengthPrefixed(&ignored) { + return fullLen, errors.New("unable to read status request extension data") + } + + if statusType != statusTypeOCSP { + return fullLen, errors.New("status request extension statusType is not statusTypeOCSP(1)") + } + + return fullLen, nil +} + +func (e *StatusRequestExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.OcspStapling = true + return nil +} + +// SupportedCurvesExtension implements supported_groups (renamed from "elliptic_curves") (10) +type SupportedCurvesExtension struct { + Curves []CurveID +} + +func (e *SupportedCurvesExtension) Len() int { + return 6 + 2*len(e.Curves) +} + +func (e *SupportedCurvesExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // http://tools.ietf.org/html/rfc4492#section-5.5.1 + b[0] = byte(extensionSupportedCurves >> 8) + b[1] = byte(extensionSupportedCurves) + b[2] = byte((2 + 2*len(e.Curves)) >> 8) + b[3] = byte(2 + 2*len(e.Curves)) + b[4] = byte((2 * len(e.Curves)) >> 8) + b[5] = byte(2 * len(e.Curves)) + for i, curve := range e.Curves { + b[6+2*i] = byte(curve >> 8) + b[7+2*i] = byte(curve) + } + return e.Len(), io.EOF +} + +func (e *SupportedCurvesExtension) UnmarshalJSON(data []byte) error { + var namedGroups struct { + NamedGroupList []string `json:"named_group_list"` + } + if err := json.Unmarshal(data, &namedGroups); err != nil { + return err + } + + for _, namedGroup := range namedGroups.NamedGroupList { + if namedGroup == "GREASE" { + e.Curves = append(e.Curves, GREASE_PLACEHOLDER) + continue + } + + if group, ok := dicttls.DictSupportedGroupsNameIndexed[namedGroup]; ok { + e.Curves = append(e.Curves, CurveID(group)) + } else { + return fmt.Errorf("unknown named group: %s", namedGroup) + } + } + return nil +} + +func (e *SupportedCurvesExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 4492, sections 5.1.1 and RFC 8446, Section 4.2.7 + var curvesBytes cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&curvesBytes) || curvesBytes.Empty() { + return 0, errors.New("unable to read supported curves extension data") + } + curves := []CurveID{} + for !curvesBytes.Empty() { + var curve uint16 + if !curvesBytes.ReadUint16(&curve) { + return 0, errors.New("unable to read supported curves extension data") + } + curves = append(curves, CurveID(unGREASEUint16(curve))) + } + e.Curves = curves + return fullLen, nil +} + +func (e *SupportedCurvesExtension) writeToUConn(uc *UConn) error { + uc.config.CurvePreferences = e.Curves + uc.HandshakeState.Hello.SupportedCurves = e.Curves + return nil +} + +// SupportedPointsExtension implements ec_point_formats (11) +type SupportedPointsExtension struct { + SupportedPoints []uint8 +} + +func (e *SupportedPointsExtension) Len() int { + return 5 + len(e.SupportedPoints) +} + +func (e *SupportedPointsExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // http://tools.ietf.org/html/rfc4492#section-5.5.2 + b[0] = byte(extensionSupportedPoints >> 8) + b[1] = byte(extensionSupportedPoints) + b[2] = byte((1 + len(e.SupportedPoints)) >> 8) + b[3] = byte(1 + len(e.SupportedPoints)) + b[4] = byte(len(e.SupportedPoints)) + for i, pointFormat := range e.SupportedPoints { + b[5+i] = pointFormat + } + return e.Len(), io.EOF +} + +func (e *SupportedPointsExtension) UnmarshalJSON(data []byte) error { + var pointFormatList struct { + ECPointFormatList []string `json:"ec_point_format_list"` + } + if err := json.Unmarshal(data, &pointFormatList); err != nil { + return err + } + + for _, pointFormat := range pointFormatList.ECPointFormatList { + if format, ok := dicttls.DictECPointFormatNameIndexed[pointFormat]; ok { + e.SupportedPoints = append(e.SupportedPoints, format) + } else { + return fmt.Errorf("unknown point format: %s", pointFormat) + } + } + return nil +} + +func (e *SupportedPointsExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 4492, Section 5.1.2 + supportedPoints := []uint8{} + if !readUint8LengthPrefixed(&extData, &supportedPoints) || + len(supportedPoints) == 0 { + return 0, errors.New("unable to read supported points extension data") + } + e.SupportedPoints = supportedPoints + return fullLen, nil +} + +func (e *SupportedPointsExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.SupportedPoints = e.SupportedPoints + return nil +} + +// SignatureAlgorithmsExtension implements signature_algorithms (13) +type SignatureAlgorithmsExtension struct { + SupportedSignatureAlgorithms []SignatureScheme +} + +func (e *SignatureAlgorithmsExtension) Len() int { + return 6 + 2*len(e.SupportedSignatureAlgorithms) +} + +func (e *SignatureAlgorithmsExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // https://tools.ietf.org/html/rfc5246#section-7.4.1.4.1 + b[0] = byte(extensionSignatureAlgorithms >> 8) + b[1] = byte(extensionSignatureAlgorithms) + b[2] = byte((2 + 2*len(e.SupportedSignatureAlgorithms)) >> 8) + b[3] = byte(2 + 2*len(e.SupportedSignatureAlgorithms)) + b[4] = byte((2 * len(e.SupportedSignatureAlgorithms)) >> 8) + b[5] = byte(2 * len(e.SupportedSignatureAlgorithms)) + for i, sigScheme := range e.SupportedSignatureAlgorithms { + b[6+2*i] = byte(sigScheme >> 8) + b[7+2*i] = byte(sigScheme) + } + return e.Len(), io.EOF +} + +func (e *SignatureAlgorithmsExtension) UnmarshalJSON(data []byte) error { + var signatureAlgorithms struct { + Algorithms []string `json:"supported_signature_algorithms"` + } + if err := json.Unmarshal(data, &signatureAlgorithms); err != nil { + return err + } + + for _, sigScheme := range signatureAlgorithms.Algorithms { + if sigScheme == "GREASE" { + e.SupportedSignatureAlgorithms = append(e.SupportedSignatureAlgorithms, GREASE_PLACEHOLDER) + continue + } + + if scheme, ok := dicttls.DictSignatureSchemeNameIndexed[sigScheme]; ok { + e.SupportedSignatureAlgorithms = append(e.SupportedSignatureAlgorithms, SignatureScheme(scheme)) + } else { + return fmt.Errorf("unknown signature scheme: %s", sigScheme) + } + } + return nil +} + +func (e *SignatureAlgorithmsExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 5246, Section 7.4.1.4.1 + var sigAndAlgs cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sigAndAlgs) || sigAndAlgs.Empty() { + return 0, errors.New("unable to read signature algorithms extension data") + } + supportedSignatureAlgorithms := []SignatureScheme{} + for !sigAndAlgs.Empty() { + var sigAndAlg uint16 + if !sigAndAlgs.ReadUint16(&sigAndAlg) { + return 0, errors.New("unable to read signature algorithms extension data") + } + supportedSignatureAlgorithms = append( + supportedSignatureAlgorithms, SignatureScheme(sigAndAlg)) + } + e.SupportedSignatureAlgorithms = supportedSignatureAlgorithms + return fullLen, nil +} + +func (e *SignatureAlgorithmsExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.SupportedSignatureAlgorithms = e.SupportedSignatureAlgorithms + return nil +} + +// StatusRequestV2Extension implements status_request_v2 (17) +type StatusRequestV2Extension struct { +} + +func (e *StatusRequestV2Extension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.OcspStapling = true + return nil +} + +func (e *StatusRequestV2Extension) Len() int { + return 13 +} + +func (e *StatusRequestV2Extension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // RFC 4366, section 3.6 + b[0] = byte(extensionStatusRequestV2 >> 8) + b[1] = byte(extensionStatusRequestV2) + b[2] = 0 + b[3] = 9 + b[4] = 0 + b[5] = 7 + b[6] = 2 // OCSP type + b[7] = 0 + b[8] = 4 + // Two zero valued uint16s for the two lengths. + return e.Len(), io.EOF +} + +// Write is a no-op for StatusRequestV2Extension. No data for this extension. +func (e *StatusRequestV2Extension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 4366, Section 3.6 + var statusType uint8 + var ignored cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&ignored) || !ignored.ReadUint8(&statusType) { + return fullLen, errors.New("unable to read status request v2 extension data") + } + + if statusType != statusV2TypeOCSP { + return fullLen, errors.New("status request v2 extension statusType is not statusV2TypeOCSP(2)") + } + + return fullLen, nil +} + +func (e *StatusRequestV2Extension) UnmarshalJSON(_ []byte) error { + return nil // no-op +} + +// SignatureAlgorithmsCertExtension implements signature_algorithms_cert (50) +type SignatureAlgorithmsCertExtension struct { + SupportedSignatureAlgorithms []SignatureScheme +} + +func (e *SignatureAlgorithmsCertExtension) Len() int { + return 6 + 2*len(e.SupportedSignatureAlgorithms) +} + +func (e *SignatureAlgorithmsCertExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // https://tools.ietf.org/html/rfc5246#section-7.4.1.4.1 + b[0] = byte(extensionSignatureAlgorithmsCert >> 8) + b[1] = byte(extensionSignatureAlgorithmsCert) + b[2] = byte((2 + 2*len(e.SupportedSignatureAlgorithms)) >> 8) + b[3] = byte(2 + 2*len(e.SupportedSignatureAlgorithms)) + b[4] = byte((2 * len(e.SupportedSignatureAlgorithms)) >> 8) + b[5] = byte(2 * len(e.SupportedSignatureAlgorithms)) + for i, sigAndHash := range e.SupportedSignatureAlgorithms { + b[6+2*i] = byte(sigAndHash >> 8) + b[7+2*i] = byte(sigAndHash) + } + return e.Len(), io.EOF +} + +// Copied from SignatureAlgorithmsExtension.UnmarshalJSON +func (e *SignatureAlgorithmsCertExtension) UnmarshalJSON(data []byte) error { + var signatureAlgorithms struct { + Algorithms []string `json:"supported_signature_algorithms"` + } + if err := json.Unmarshal(data, &signatureAlgorithms); err != nil { + return err + } + + for _, sigScheme := range signatureAlgorithms.Algorithms { + if sigScheme == "GREASE" { + e.SupportedSignatureAlgorithms = append(e.SupportedSignatureAlgorithms, GREASE_PLACEHOLDER) + continue + } + + if scheme, ok := dicttls.DictSignatureSchemeNameIndexed[sigScheme]; ok { + e.SupportedSignatureAlgorithms = append(e.SupportedSignatureAlgorithms, SignatureScheme(scheme)) + } else { + return fmt.Errorf("unknown cert signature scheme: %s", sigScheme) + } + } + return nil +} + +// Write implementation copied from SignatureAlgorithmsExtension.Write +// +// Warning: not tested. +func (e *SignatureAlgorithmsCertExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 8446, Section 4.2.3 + var sigAndAlgs cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sigAndAlgs) || sigAndAlgs.Empty() { + return 0, errors.New("unable to read signature algorithms extension data") + } + supportedSignatureAlgorithms := []SignatureScheme{} + for !sigAndAlgs.Empty() { + var sigAndAlg uint16 + if !sigAndAlgs.ReadUint16(&sigAndAlg) { + return 0, errors.New("unable to read signature algorithms extension data") + } + supportedSignatureAlgorithms = append( + supportedSignatureAlgorithms, SignatureScheme(sigAndAlg)) + } + e.SupportedSignatureAlgorithms = supportedSignatureAlgorithms + return fullLen, nil +} + +func (e *SignatureAlgorithmsCertExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.SupportedSignatureAlgorithms = e.SupportedSignatureAlgorithms + return nil +} + +// ALPNExtension implements application_layer_protocol_negotiation (16) +type ALPNExtension struct { + AlpnProtocols []string +} + +func (e *ALPNExtension) writeToUConn(uc *UConn) error { + uc.config.NextProtos = e.AlpnProtocols + uc.HandshakeState.Hello.AlpnProtocols = e.AlpnProtocols + return nil +} + +func (e *ALPNExtension) Len() int { + bLen := 2 + 2 + 2 + for _, s := range e.AlpnProtocols { + bLen += 1 + len(s) + } + return bLen +} + +func (e *ALPNExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + b[0] = byte(extensionALPN >> 8) + b[1] = byte(extensionALPN & 0xff) + lengths := b[2:] + b = b[6:] + + stringsLength := 0 + for _, s := range e.AlpnProtocols { + l := len(s) + b[0] = byte(l) + copy(b[1:], s) + b = b[1+l:] + stringsLength += 1 + l + } + + lengths[2] = byte(stringsLength >> 8) + lengths[3] = byte(stringsLength) + stringsLength += 2 + lengths[0] = byte(stringsLength >> 8) + lengths[1] = byte(stringsLength) + + return e.Len(), io.EOF +} + +func (e *ALPNExtension) UnmarshalJSON(b []byte) error { + var protocolNames struct { + ProtocolNameList []string `json:"protocol_name_list"` + } + + if err := json.Unmarshal(b, &protocolNames); err != nil { + return err + } + + e.AlpnProtocols = protocolNames.ProtocolNameList + return nil +} + +func (e *ALPNExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 7301, Section 3.1 + var protoList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&protoList) || protoList.Empty() { + return 0, errors.New("unable to read ALPN extension data") + } + alpnProtocols := []string{} + for !protoList.Empty() { + var proto cryptobyte.String + if !protoList.ReadUint8LengthPrefixed(&proto) || proto.Empty() { + return 0, errors.New("unable to read ALPN extension data") + } + alpnProtocols = append(alpnProtocols, string(proto)) + + } + e.AlpnProtocols = alpnProtocols + return fullLen, nil +} + +// applicationSettingsExtension represents the TLS ALPS extension. +// At the time of this writing, this extension is currently a draft: +// https://datatracker.ietf.org/doc/html/draft-vvv-tls-alps-01 +type applicationSettingsExtension struct { + codePoint uint16 +} + +func (e *applicationSettingsExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *applicationSettingsExtension) Len(supportedProtocols []string) int { + bLen := 2 + 2 + 2 // Type + Length + ALPS Extension length + for _, s := range supportedProtocols { + bLen += 1 + len(s) // Supported ALPN Length + actual length of protocol + } + return bLen +} + +func (e *applicationSettingsExtension) Read(b []byte, supportedProtocols []string) (int, error) { + if len(b) < e.Len(supportedProtocols) { + return 0, io.ErrShortBuffer + } + + // Read Type. + b[0] = byte(e.codePoint >> 8) // hex: 44 dec: 68 + b[1] = byte(e.codePoint & 0xff) // hex: 69 dec: 105 + + lengths := b[2:] // get the remaining buffer without Type + b = b[6:] // set the buffer to the buffer without Type, Length and ALPS Extension Length (so only the Supported ALPN list remains) + + stringsLength := 0 + for _, s := range supportedProtocols { + l := len(s) // Supported ALPN Length + b[0] = byte(l) // Supported ALPN Length in bytes hex: 02 dec: 2 + copy(b[1:], s) // copy the Supported ALPN as bytes to the buffer + b = b[1+l:] // set the buffer to the buffer without the Supported ALPN Length and Supported ALPN (so we can continue to the next protocol in this loop) + stringsLength += 1 + l // Supported ALPN Length (the field itself) + Supported ALPN Length (the value) + } + + lengths[2] = byte(stringsLength >> 8) // ALPS Extension Length hex: 00 dec: 0 + lengths[3] = byte(stringsLength) // ALPS Extension Length hex: 03 dec: 3 + stringsLength += 2 // plus ALPS Extension Length field length + lengths[0] = byte(stringsLength >> 8) // Length hex:00 dec: 0 + lengths[1] = byte(stringsLength) // Length hex: 05 dec: 5 + + return e.Len(supportedProtocols), io.EOF +} + +// Write implementation copied from ALPNExtension.Write +func (e *applicationSettingsExtension) Write(b []byte) ([]string, int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // https://datatracker.ietf.org/doc/html/draft-vvv-tls-alps-01 + var protoList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&protoList) || protoList.Empty() { + return nil, 0, errors.New("unable to read ALPN extension data") + } + alpnProtocols := []string{} + for !protoList.Empty() { + var proto cryptobyte.String + if !protoList.ReadUint8LengthPrefixed(&proto) || proto.Empty() { + return nil, 0, errors.New("unable to read ALPN extension data") + } + alpnProtocols = append(alpnProtocols, string(proto)) + + } + return alpnProtocols, fullLen, nil +} + +// ApplicationSettingsExtension embeds applicationSettingsExtension to implement the TLS ALPS extension on codepoint 17513 +type ApplicationSettingsExtension struct { + applicationSettingsExtension + SupportedProtocols []string +} + +func (e *ApplicationSettingsExtension) Len() int { + return e.applicationSettingsExtension.Len(e.SupportedProtocols) +} + +func (e *ApplicationSettingsExtension) Read(b []byte) (int, error) { + e.applicationSettingsExtension.codePoint = utlsExtensionApplicationSettings + return e.applicationSettingsExtension.Read(b, e.SupportedProtocols) +} + +func (e *ApplicationSettingsExtension) UnmarshalJSON(b []byte) error { + var applicationSettingsSupport struct { + SupportedProtocols []string `json:"supported_protocols"` + } + + if err := json.Unmarshal(b, &applicationSettingsSupport); err != nil { + return err + } + + e.SupportedProtocols = applicationSettingsSupport.SupportedProtocols + return nil +} + +// Write implementation copied from ALPNExtension.Write +func (e *ApplicationSettingsExtension) Write(b []byte) (int, error) { + var ( + fullLen int + err error + ) + e.SupportedProtocols, fullLen, err = e.applicationSettingsExtension.Write(b) + return fullLen, err +} + +// ApplicationSettingsExtensionNew embeds applicationSettingsExtension to implement the TLS ALPS extension on codepoint 17613 +// More information can be found here: https://chromestatus.com/feature/5149147365900288 +type ApplicationSettingsExtensionNew struct { + applicationSettingsExtension + SupportedProtocols []string +} + +func (e *ApplicationSettingsExtensionNew) Len() int { + return e.applicationSettingsExtension.Len(e.SupportedProtocols) +} + +func (e *ApplicationSettingsExtensionNew) Read(b []byte) (int, error) { + e.applicationSettingsExtension.codePoint = utlsExtensionApplicationSettingsNew + return e.applicationSettingsExtension.Read(b, e.SupportedProtocols) +} + +func (e *ApplicationSettingsExtensionNew) UnmarshalJSON(b []byte) error { + var applicationSettingsSupport struct { + SupportedProtocols []string `json:"supported_protocols"` + } + + if err := json.Unmarshal(b, &applicationSettingsSupport); err != nil { + return err + } + + e.SupportedProtocols = applicationSettingsSupport.SupportedProtocols + return nil +} + +// Write implementation copied from ALPNExtension.Write +func (e *ApplicationSettingsExtensionNew) Write(b []byte) (int, error) { + var ( + fullLen int + err error + ) + e.SupportedProtocols, fullLen, err = e.applicationSettingsExtension.Write(b) + return fullLen, err +} + +// SCTExtension implements signed_certificate_timestamp (18) +type SCTExtension struct { +} + +func (e *SCTExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.Scts = true + return nil +} + +func (e *SCTExtension) Len() int { + return 4 +} + +func (e *SCTExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // https://tools.ietf.org/html/rfc6962#section-3.3.1 + b[0] = byte(extensionSCT >> 8) + b[1] = byte(extensionSCT) + // zero uint16 for the zero-length extension_data + return e.Len(), io.EOF +} + +func (e *SCTExtension) UnmarshalJSON(_ []byte) error { + return nil // no-op +} + +func (e *SCTExtension) Write(_ []byte) (int, error) { + return 0, nil +} + +// GenericExtension allows to include in ClientHello arbitrary unsupported extensions. +// It is not defined in TLS RFCs nor by IANA. +// If a server echoes this extension back, the handshake will likely fail due to no further support. +type GenericExtension struct { + Id uint16 + Data []byte +} + +func (e *GenericExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *GenericExtension) Len() int { + return 4 + len(e.Data) +} + +func (e *GenericExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + b[0] = byte(e.Id >> 8) + b[1] = byte(e.Id) + b[2] = byte(len(e.Data) >> 8) + b[3] = byte(len(e.Data)) + if len(e.Data) > 0 { + copy(b[4:], e.Data) + } + return e.Len(), io.EOF +} + +func (e *GenericExtension) UnmarshalJSON(b []byte) error { + var genericExtension struct { + Name string `json:"name"` + Data []byte `json:"data"` + } + if err := json.Unmarshal(b, &genericExtension); err != nil { + return err + } + + // lookup extension ID by name + if id, ok := dicttls.DictExtTypeNameIndexed[genericExtension.Name]; ok { + e.Id = id + } else { + return fmt.Errorf("unknown extension name %s", genericExtension.Name) + } + e.Data = genericExtension.Data + return nil +} + +// ExtendedMasterSecretExtension implements extended_master_secret (23) +// +// Was named as ExtendedMasterSecretExtension, renamed due to crypto/tls +// implemented this extension's support. +type ExtendedMasterSecretExtension struct { +} + +// TODO: update when this extension is implemented in crypto/tls +// but we probably won't have to enable it in Config +func (e *ExtendedMasterSecretExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.Ems = true + return nil +} + +func (e *ExtendedMasterSecretExtension) Len() int { + return 4 +} + +func (e *ExtendedMasterSecretExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // https://tools.ietf.org/html/rfc7627 + b[0] = byte(extensionExtendedMasterSecret >> 8) + b[1] = byte(extensionExtendedMasterSecret) + // The length is 0 + return e.Len(), io.EOF +} + +func (e *ExtendedMasterSecretExtension) UnmarshalJSON(_ []byte) error { + return nil // no-op +} + +func (e *ExtendedMasterSecretExtension) Write(_ []byte) (int, error) { + // https://tools.ietf.org/html/rfc7627 + return 0, nil +} + +// GREASE stinks with dead parrots, have to be super careful, and, if possible, not include GREASE +// https://github.com/google/boringssl/blob/1c68fa2350936ca5897a66b430ebaf333a0e43f5/ssl/internal.h +const ( + ssl_grease_cipher = iota + ssl_grease_group + ssl_grease_extension1 + ssl_grease_extension2 + ssl_grease_version + ssl_grease_ticket_extension + ssl_grease_last_index = ssl_grease_ticket_extension +) + +// it is responsibility of user not to generate multiple grease extensions with same value +type UtlsGREASEExtension struct { + Value uint16 + Body []byte // in Chrome first grease has empty body, second grease has a single zero byte +} + +func (e *UtlsGREASEExtension) writeToUConn(uc *UConn) error { + return nil +} + +// will panic if ssl_grease_last_index[index] is out of bounds. +func GetBoringGREASEValue(greaseSeed [ssl_grease_last_index]uint16, index int) uint16 { + // GREASE value is back from deterministic to random. + // https://github.com/google/boringssl/blob/a365138ac60f38b64bfc608b493e0f879845cb88/ssl/handshake_client.c#L530 + ret := uint16(greaseSeed[index]) + /* This generates a random value of the form 0xωaωa, for all 0 ≤ ω < 16. */ + ret = (ret & 0xf0) | 0x0a + ret |= ret << 8 + return ret +} + +func (e *UtlsGREASEExtension) Len() int { + return 4 + len(e.Body) +} + +func (e *UtlsGREASEExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + b[0] = byte(e.Value >> 8) + b[1] = byte(e.Value) + b[2] = byte(len(e.Body) >> 8) + b[3] = byte(len(e.Body)) + if len(e.Body) > 0 { + copy(b[4:], e.Body) + } + return e.Len(), io.EOF +} + +func (e *UtlsGREASEExtension) Write(b []byte) (int, error) { + e.Value = GREASE_PLACEHOLDER + e.Body = make([]byte, len(b)) + n := copy(e.Body, b) + return n, nil +} + +func (e *UtlsGREASEExtension) UnmarshalJSON(b []byte) error { + var jsonObj struct { + Id uint16 `json:"id"` + Data []byte `json:"data"` + KeepID bool `json:"keep_id"` + KeepData bool `json:"keep_data"` + } + + if err := json.Unmarshal(b, &jsonObj); err != nil { + return err + } + + if jsonObj.Id == 0 { + return nil + } + + if isGREASEUint16(jsonObj.Id) { + if jsonObj.KeepID { + e.Value = jsonObj.Id + } + if jsonObj.KeepData { + e.Body = jsonObj.Data + } + return nil + } else { + return errors.New("GREASE extension id must be a GREASE value") + } +} + +// UtlsPaddingExtension implements padding (21) +type UtlsPaddingExtension struct { + PaddingLen int + WillPad bool // set to false to disable extension + + // Functor for deciding on padding length based on unpadded ClientHello length. + // If willPad is false, then this extension should not be included. + GetPaddingLen func(clientHelloUnpaddedLen int) (paddingLen int, willPad bool) +} + +func (e *UtlsPaddingExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *UtlsPaddingExtension) Len() int { + if e.WillPad { + return 4 + e.PaddingLen + } else { + return 0 + } +} + +func (e *UtlsPaddingExtension) Update(clientHelloUnpaddedLen int) { + if e.GetPaddingLen != nil { + e.PaddingLen, e.WillPad = e.GetPaddingLen(clientHelloUnpaddedLen) + } +} + +func (e *UtlsPaddingExtension) Read(b []byte) (int, error) { + if !e.WillPad { + return 0, io.EOF + } + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // https://tools.ietf.org/html/rfc7627 + b[0] = byte(utlsExtensionPadding >> 8) + b[1] = byte(utlsExtensionPadding) + b[2] = byte(e.PaddingLen >> 8) + b[3] = byte(e.PaddingLen) + return e.Len(), io.EOF +} + +func (e *UtlsPaddingExtension) UnmarshalJSON(b []byte) error { + var jsonObj struct { + Length uint `json:"len"` + } + if err := json.Unmarshal(b, &jsonObj); err != nil { + return err + } + + if jsonObj.Length == 0 { + e.GetPaddingLen = BoringPaddingStyle + } else { + e.PaddingLen = int(jsonObj.Length) + e.WillPad = true + } + + return nil +} + +func (e *UtlsPaddingExtension) Write(_ []byte) (int, error) { + e.GetPaddingLen = BoringPaddingStyle + return 0, nil +} + +// https://github.com/google/boringssl/blob/7d7554b6b3c79e707e25521e61e066ce2b996e4c/ssl/t1_lib.c#L2803 +func BoringPaddingStyle(unpaddedLen int) (int, bool) { + if unpaddedLen > 0xff && unpaddedLen < 0x200 { + paddingLen := 0x200 - unpaddedLen + if paddingLen >= 4+1 { + paddingLen -= 4 + } else { + paddingLen = 1 + } + return paddingLen, true + } + return 0, false +} + +// AlwaysPadToLen could be used for parsed ClientHello, since some fingerprints +// might not use BoringSSL padding style and we want to pad to a the same length. +func AlwaysPadToLen(padToLen int) func(int) (int, bool) { + return func(unpaddedLen int) (int, bool) { + if unpaddedLen < padToLen { + paddingLen := padToLen - unpaddedLen + if paddingLen >= 4+1 { + paddingLen -= 4 + } else { + paddingLen = 1 + } + return paddingLen, true + } + return 0, false + } +} + +// UtlsCompressCertExtension implements compress_certificate (27) and is only implemented client-side +// for server certificates. Alternate certificate message formats +// (https://datatracker.ietf.org/doc/html/rfc7250) are not supported. +// +// See https://datatracker.ietf.org/doc/html/rfc8879#section-3 +type UtlsCompressCertExtension struct { + Algorithms []CertCompressionAlgo +} + +func (e *UtlsCompressCertExtension) writeToUConn(uc *UConn) error { + uc.certCompressionAlgs = e.Algorithms + return nil +} + +func (e *UtlsCompressCertExtension) Len() int { + return 4 + 1 + (2 * len(e.Algorithms)) +} + +func (e *UtlsCompressCertExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + b[0] = byte(utlsExtensionCompressCertificate >> 8) + b[1] = byte(utlsExtensionCompressCertificate & 0xff) + + extLen := 2 * len(e.Algorithms) + if extLen > 255 { + return 0, errors.New("too many certificate compression methods") + } + + // Extension data length. + b[2] = byte((extLen + 1) >> 8) + b[3] = byte((extLen + 1) & 0xff) + + // Methods length. + b[4] = byte(extLen) + + i := 5 + for _, compMethod := range e.Algorithms { + b[i] = byte(compMethod >> 8) + b[i+1] = byte(compMethod) + i += 2 + } + return e.Len(), io.EOF +} + +func (e *UtlsCompressCertExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + methods := []CertCompressionAlgo{} + methodsRaw := new(cryptobyte.String) + if !extData.ReadUint8LengthPrefixed(methodsRaw) { + return 0, errors.New("unable to read cert compression algorithms extension data") + } + for !methodsRaw.Empty() { + var method uint16 + if !methodsRaw.ReadUint16(&method) { + return 0, errors.New("unable to read cert compression algorithms extension data") + } + methods = append(methods, CertCompressionAlgo(method)) + } + + e.Algorithms = methods + return fullLen, nil +} + +func (e *UtlsCompressCertExtension) UnmarshalJSON(b []byte) error { + var certificateCompressionAlgorithms struct { + Algorithms []string `json:"algorithms"` + } + if err := json.Unmarshal(b, &certificateCompressionAlgorithms); err != nil { + return err + } + + for _, algorithm := range certificateCompressionAlgorithms.Algorithms { + if alg, ok := dicttls.DictCertificateCompressionAlgorithmNameIndexed[algorithm]; ok { + e.Algorithms = append(e.Algorithms, CertCompressionAlgo(alg)) + } else { + return fmt.Errorf("unknown certificate compression algorithm %s", algorithm) + } + } + return nil +} + +// Same as KeyShareExtension with extra options added without breaking users that +// use positional struct literal for KeyShareExtension +type KeyShareExtensionExtended struct { + *KeyShareExtension + + // whether to reuse keys for the same algorithm for hybrid key shares with traditional key shares + // according to draft-ietf-tls-hybrid-design-14 section 3.2 + HybridReuseKey bool +} + +// KeyShareExtension implements key_share (51) and is for TLS 1.3 only. +type KeyShareExtension struct { + KeyShares []KeyShare +} + +func (e *KeyShareExtension) Len() int { + return 4 + 2 + e.keySharesLen() +} + +func (e *KeyShareExtension) keySharesLen() int { + extLen := 0 + for _, ks := range e.KeyShares { + extLen += 4 + len(ks.Data) + } + return extLen +} + +func (e *KeyShareExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + b[0] = byte(extensionKeyShare >> 8) + b[1] = byte(extensionKeyShare) + keySharesLen := e.keySharesLen() + b[2] = byte((keySharesLen + 2) >> 8) + b[3] = byte(keySharesLen + 2) + b[4] = byte((keySharesLen) >> 8) + b[5] = byte(keySharesLen) + + i := 6 + for _, ks := range e.KeyShares { + b[i] = byte(ks.Group >> 8) + b[i+1] = byte(ks.Group) + b[i+2] = byte(len(ks.Data) >> 8) + b[i+3] = byte(len(ks.Data)) + copy(b[i+4:], ks.Data) + i += 4 + len(ks.Data) + } + + return e.Len(), io.EOF +} + +func (e *KeyShareExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 8446, Section 4.2.8 + var clientShares cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&clientShares) { + return 0, errors.New("unable to read key share extension data") + } + keyShares := []KeyShare{} + for !clientShares.Empty() { + var ks KeyShare + var group uint16 + if !clientShares.ReadUint16(&group) || + !readUint16LengthPrefixed(&clientShares, &ks.Data) || + len(ks.Data) == 0 { + return 0, errors.New("unable to read key share extension data") + } + ks.Group = CurveID(unGREASEUint16(group)) + // if not GREASE, key share data will be discarded as it should + // be generated per connection + if ks.Group != GREASE_PLACEHOLDER { + ks.Data = nil + } + keyShares = append(keyShares, ks) + } + e.KeyShares = keyShares + return fullLen, nil +} + +func (e *KeyShareExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.KeyShares = e.KeyShares + return nil +} + +func (e *KeyShareExtension) UnmarshalJSON(b []byte) error { + var keyShareClientHello struct { + ClientShares []struct { + Group string `json:"group"` + KeyExchange []uint8 `json:"key_exchange"` + } `json:"client_shares"` + } + if err := json.Unmarshal(b, &keyShareClientHello); err != nil { + return err + } + + for _, clientShare := range keyShareClientHello.ClientShares { + if clientShare.Group == "GREASE" { + e.KeyShares = append(e.KeyShares, KeyShare{ + Group: GREASE_PLACEHOLDER, + Data: clientShare.KeyExchange, + }) + continue + } + + if groupID, ok := dicttls.DictSupportedGroupsNameIndexed[clientShare.Group]; ok { + ks := KeyShare{ + Group: CurveID(groupID), + Data: clientShare.KeyExchange, + } + e.KeyShares = append(e.KeyShares, ks) + } else { + return fmt.Errorf("unknown group %s", clientShare.Group) + } + } + return nil +} + +// QUICTransportParametersExtension implements quic_transport_parameters (57). +// +// Currently, it works as a fake extension and does not support parsing, since +// the QUICConn provided by this package does not really understand these +// parameters. +type QUICTransportParametersExtension struct { + TransportParameters TransportParameters + + marshalResult []byte // TransportParameters will be marshaled into this slice +} + +func (e *QUICTransportParametersExtension) Len() int { + if e.marshalResult == nil { + e.marshalResult = e.TransportParameters.Marshal() + } + return 4 + len(e.marshalResult) +} + +func (e *QUICTransportParametersExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + b[0] = byte(extensionQUICTransportParameters >> 8) + b[1] = byte(extensionQUICTransportParameters) + // e.Len() is called before so that e.marshalResult is set + b[2] = byte((len(e.marshalResult)) >> 8) + b[3] = byte(len(e.marshalResult)) + copy(b[4:], e.marshalResult) + + return e.Len(), io.EOF +} + +func (e *QUICTransportParametersExtension) writeToUConn(*UConn) error { + // no need to set *UConn.quic.transportParams, since it is unused + return nil +} + +// PSKKeyExchangeModesExtension implements psk_key_exchange_modes (45). +type PSKKeyExchangeModesExtension struct { + Modes []uint8 +} + +func (e *PSKKeyExchangeModesExtension) Len() int { + return 4 + 1 + len(e.Modes) +} + +func (e *PSKKeyExchangeModesExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + if len(e.Modes) > 255 { + return 0, errors.New("too many PSK Key Exchange modes") + } + + b[0] = byte(extensionPSKModes >> 8) + b[1] = byte(extensionPSKModes) + + modesLen := len(e.Modes) + b[2] = byte((modesLen + 1) >> 8) + b[3] = byte(modesLen + 1) + b[4] = byte(modesLen) + + if len(e.Modes) > 0 { + copy(b[5:], e.Modes) + } + + return e.Len(), io.EOF +} + +func (e *PSKKeyExchangeModesExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 8446, Section 4.2.9 + // TODO: PSK Modes have their own form of GREASE-ing which is not currently implemented + // the current functionality will NOT re-GREASE/re-randomize these values when using a fingerprinted spec + // https://github.com/enetx/utls/pull/58#discussion_r522354105 + // https://tools.ietf.org/html/draft-ietf-tls-grease-01#section-2 + pskModes := []uint8{} + if !readUint8LengthPrefixed(&extData, &pskModes) { + return 0, errors.New("unable to read PSK extension data") + } + e.Modes = pskModes + return fullLen, nil +} + +func (e *PSKKeyExchangeModesExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.PskModes = e.Modes + return nil +} + +func (e *PSKKeyExchangeModesExtension) UnmarshalJSON(b []byte) error { + var pskKeyExchangeModes struct { + Modes []string `json:"ke_modes"` + } + if err := json.Unmarshal(b, &pskKeyExchangeModes); err != nil { + return err + } + + for _, mode := range pskKeyExchangeModes.Modes { + if modeID, ok := dicttls.DictPSKKeyExchangeModeNameIndexed[mode]; ok { + e.Modes = append(e.Modes, modeID) + } else { + return fmt.Errorf("unknown PSK Key Exchange Mode %s", mode) + } + } + return nil +} + +// SupportedVersionsExtension implements supported_versions (43). +type SupportedVersionsExtension struct { + Versions []uint16 +} + +func (e *SupportedVersionsExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.SupportedVersions = e.Versions + return nil +} + +func (e *SupportedVersionsExtension) Len() int { + return 4 + 1 + (2 * len(e.Versions)) +} + +func (e *SupportedVersionsExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + extLen := 2 * len(e.Versions) + if extLen > 255 { + return 0, errors.New("too many supported versions") + } + + b[0] = byte(extensionSupportedVersions >> 8) + b[1] = byte(extensionSupportedVersions) + b[2] = byte((extLen + 1) >> 8) + b[3] = byte(extLen + 1) + b[4] = byte(extLen) + + i := 5 + for _, sv := range e.Versions { + b[i] = byte(sv >> 8) + b[i+1] = byte(sv) + i += 2 + } + return e.Len(), io.EOF +} + +func (e *SupportedVersionsExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 8446, Section 4.2.1 + var versList cryptobyte.String + if !extData.ReadUint8LengthPrefixed(&versList) || versList.Empty() { + return 0, errors.New("unable to read supported versions extension data") + } + supportedVersions := []uint16{} + for !versList.Empty() { + var vers uint16 + if !versList.ReadUint16(&vers) { + return 0, errors.New("unable to read supported versions extension data") + } + supportedVersions = append(supportedVersions, unGREASEUint16(vers)) + } + e.Versions = supportedVersions + return fullLen, nil +} + +func (e *SupportedVersionsExtension) UnmarshalJSON(b []byte) error { + var supportedVersions struct { + Versions []string `json:"versions"` + } + if err := json.Unmarshal(b, &supportedVersions); err != nil { + return err + } + + for _, version := range supportedVersions.Versions { + switch version { + case "GREASE": + e.Versions = append(e.Versions, GREASE_PLACEHOLDER) + case "TLS 1.3": + e.Versions = append(e.Versions, VersionTLS13) + case "TLS 1.2": + e.Versions = append(e.Versions, VersionTLS12) + case "TLS 1.1": + e.Versions = append(e.Versions, VersionTLS11) + case "TLS 1.0": + e.Versions = append(e.Versions, VersionTLS10) + case "SSL 3.0": // deprecated + // e.Versions = append(e.Versions, VersionSSL30) + return fmt.Errorf("SSL 3.0 is deprecated") + default: + return fmt.Errorf("unknown version %s", version) + } + } + return nil +} + +// CookieExtension implements cookie (44). +// MUST NOT be part of initial ClientHello +type CookieExtension struct { + Cookie []byte +} + +func (e *CookieExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *CookieExtension) Len() int { + // The total length of the Cookie extension is: + // 2 bytes for ExtensionType (extensionCookie) + // 2 bytes for OuterExtensionDataLength + // 2 bytes for InnerCookieLength (len(e.Cookie)) + // N bytes for the Cookie data itself (e.Cookie) + // So, total = 6 + len(e.Cookie) + return 6 + len(e.Cookie) +} + +func (e *CookieExtension) Read(b []byte) (int, error) { + cookieLen := len(e.Cookie) + + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + // Extension type + b[0] = byte(extensionCookie >> 8) + b[1] = byte(extensionCookie) + + // Copied from BoringSSL https://boringssl.googlesource.com/boringssl.git/%2B/chromium-stable/ssl/extensions.cc#2465 + // Total extension_data length + extDataLen := 2 + cookieLen // 2 bytes for cookie length + cookie + b[2] = byte(extDataLen >> 8) + b[3] = byte(extDataLen) + + // Cookie length + b[4] = byte(cookieLen >> 8) + b[5] = byte(cookieLen) + + // Cookie value + copy(b[6:], e.Cookie) + + return e.Len(), io.EOF +} + +func (e *CookieExtension) UnmarshalJSON(data []byte) error { + var cookie struct { + Cookie []uint8 `json:"cookie"` + } + if err := json.Unmarshal(data, &cookie); err != nil { + return err + } + e.Cookie = []byte(cookie.Cookie) + return nil +} + +// NPNExtension implements next_protocol_negotiation (Not IANA assigned) +type NPNExtension struct { + NextProtos []string +} + +func (e *NPNExtension) writeToUConn(uc *UConn) error { + uc.config.NextProtos = e.NextProtos + uc.HandshakeState.Hello.NextProtoNeg = true + return nil +} + +func (e *NPNExtension) Len() int { + return 4 +} + +func (e *NPNExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + b[0] = byte(extensionNextProtoNeg >> 8) + b[1] = byte(extensionNextProtoNeg & 0xff) + // The length is always 0 + return e.Len(), io.EOF +} + +// Write is a no-op for NPNExtension. NextProtos are not included in the +// ClientHello. +func (e *NPNExtension) Write(_ []byte) (int, error) { + return 0, nil +} + +// draft-agl-tls-nextprotoneg-04: +// The "extension_data" field of a "next_protocol_negotiation" extension +// in a "ClientHello" MUST be empty. +func (e *NPNExtension) UnmarshalJSON(_ []byte) error { + return nil +} + +// RenegotiationInfoExtension implements renegotiation_info (65281) +type RenegotiationInfoExtension struct { + // Renegotiation field limits how many times client will perform renegotiation: no limit, once, or never. + // The extension still will be sent, even if Renegotiation is set to RenegotiateNever. + Renegotiation RenegotiationSupport // [UTLS] added for internal use only + + // RenegotiatedConnection is not yet properly handled, now we + // are just copying it to the client hello. + // + // If this is the initial handshake for a connection, then the + // "renegotiated_connection" field is of zero length in both the + // ClientHello and the ServerHello. + RenegotiatedConnection []byte +} + +func (e *RenegotiationInfoExtension) Len() int { + return 5 + len(e.RenegotiatedConnection) +} + +func (e *RenegotiationInfoExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + dataLen := len(e.RenegotiatedConnection) + extBodyLen := 1 + dataLen + + b[0] = byte(extensionRenegotiationInfo >> 8) + b[1] = byte(extensionRenegotiationInfo & 0xff) + b[2] = byte(extBodyLen >> 8) + b[3] = byte(extBodyLen) + b[4] = byte(dataLen) + copy(b[5:], e.RenegotiatedConnection) + + return e.Len(), io.EOF +} + +func (e *RenegotiationInfoExtension) UnmarshalJSON(_ []byte) error { + e.Renegotiation = RenegotiateOnceAsClient + return nil +} + +func (e *RenegotiationInfoExtension) Write(b []byte) (int, error) { + e.Renegotiation = RenegotiateOnceAsClient // none empty or other modes are unsupported + // extData := cryptobyte.String(b) + // var renegotiatedConnection cryptobyte.String + // if !extData.ReadUint8LengthPrefixed(&renegotiatedConnection) || !extData.Empty() { + // return 0, errors.New("unable to read renegotiation info extension data") + // } + // e.RenegotiatedConnection = make([]byte, len(renegotiatedConnection)) + // copy(e.RenegotiatedConnection, renegotiatedConnection) + + // we don't really want to parse it at all. + + return len(b), nil +} + +func (e *RenegotiationInfoExtension) writeToUConn(uc *UConn) error { + uc.config.Renegotiation = e.Renegotiation + switch e.Renegotiation { + case RenegotiateOnceAsClient: + fallthrough + case RenegotiateFreelyAsClient: + uc.HandshakeState.Hello.SecureRenegotiationSupported = true + // TODO: don't do backward propagation here + if uc.handshakes > 0 { + e.RenegotiatedConnection = uc.clientFinished[:] + } + case RenegotiateNever: + default: + } + return nil +} + +/* +FAKE EXTENSIONS +*/ + +type FakeChannelIDExtension struct { + // The extension ID changed from 30031 to 30032. Set to true to use the old extension ID. + OldExtensionID bool +} + +func (e *FakeChannelIDExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *FakeChannelIDExtension) Len() int { + return 4 +} + +func (e *FakeChannelIDExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + extensionID := fakeExtensionChannelID + if e.OldExtensionID { + extensionID = fakeOldExtensionChannelID + } + // https://tools.ietf.org/html/draft-balfanz-tls-channelid-00 + b[0] = byte(extensionID >> 8) + b[1] = byte(extensionID & 0xff) + // The length is 0 + return e.Len(), io.EOF +} + +func (e *FakeChannelIDExtension) Write(_ []byte) (int, error) { + return 0, nil +} + +func (e *FakeChannelIDExtension) UnmarshalJSON(_ []byte) error { + return nil +} + +// FakeRecordSizeLimitExtension implements record_size_limit (28) +// but with no support. +type FakeRecordSizeLimitExtension struct { + Limit uint16 +} + +func (e *FakeRecordSizeLimitExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *FakeRecordSizeLimitExtension) Len() int { + return 6 +} + +func (e *FakeRecordSizeLimitExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // https://tools.ietf.org/html/draft-balfanz-tls-channelid-00 + b[0] = byte(fakeRecordSizeLimit >> 8) + b[1] = byte(fakeRecordSizeLimit & 0xff) + + b[2] = byte(0) + b[3] = byte(2) + + b[4] = byte(e.Limit >> 8) + b[5] = byte(e.Limit & 0xff) + return e.Len(), io.EOF +} + +func (e *FakeRecordSizeLimitExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + if !extData.ReadUint16(&e.Limit) { + return 0, errors.New("unable to read record size limit extension data") + } + return fullLen, nil +} + +func (e *FakeRecordSizeLimitExtension) UnmarshalJSON(data []byte) error { + var limitAccepter struct { + Limit uint16 `json:"record_size_limit"` + } + if err := json.Unmarshal(data, &limitAccepter); err != nil { + return err + } + + e.Limit = limitAccepter.Limit + return nil +} + +type DelegatedCredentialsExtension = FakeDelegatedCredentialsExtension + +// https://tools.ietf.org/html/rfc8472#section-2 +type FakeTokenBindingExtension struct { + MajorVersion, MinorVersion uint8 + KeyParameters []uint8 +} + +func (e *FakeTokenBindingExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *FakeTokenBindingExtension) Len() int { + // extension ID + data length + versions + key parameters length + key parameters + return 2 + 2 + 2 + 1 + len(e.KeyParameters) +} + +func (e *FakeTokenBindingExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + dataLen := e.Len() - 4 + b[0] = byte(fakeExtensionTokenBinding >> 8) + b[1] = byte(fakeExtensionTokenBinding & 0xff) + b[2] = byte(dataLen >> 8) + b[3] = byte(dataLen & 0xff) + b[4] = e.MajorVersion + b[5] = e.MinorVersion + b[6] = byte(len(e.KeyParameters)) + if len(e.KeyParameters) > 0 { + copy(b[7:], e.KeyParameters) + } + return e.Len(), io.EOF +} + +func (e *FakeTokenBindingExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + var keyParameters cryptobyte.String + if !extData.ReadUint8(&e.MajorVersion) || + !extData.ReadUint8(&e.MinorVersion) || + !extData.ReadUint8LengthPrefixed(&keyParameters) { + return 0, errors.New("unable to read token binding extension data") + } + e.KeyParameters = keyParameters + return fullLen, nil +} + +func (e *FakeTokenBindingExtension) UnmarshalJSON(data []byte) error { + var tokenBindingAccepter struct { + TB_ProtocolVersion struct { + Major uint8 `json:"major"` + Minor uint8 `json:"minor"` + } `json:"token_binding_version"` + TokenBindingKeyParameters []string `json:"key_parameters_list"` + } + if err := json.Unmarshal(data, &tokenBindingAccepter); err != nil { + return err + } + + e.MajorVersion = tokenBindingAccepter.TB_ProtocolVersion.Major + e.MinorVersion = tokenBindingAccepter.TB_ProtocolVersion.Minor + for _, param := range tokenBindingAccepter.TokenBindingKeyParameters { + switch param { + case "rsa2048_pkcs1.5": + e.KeyParameters = append(e.KeyParameters, 0) + case "rsa2048_pss": + e.KeyParameters = append(e.KeyParameters, 1) + case "ecdsap256": + e.KeyParameters = append(e.KeyParameters, 2) + default: + return fmt.Errorf("unknown token binding key parameter: %s", param) + } + } + return nil +} + +// https://datatracker.ietf.org/doc/html/draft-ietf-tls-subcerts-15#section-4.1.1 + +type FakeDelegatedCredentialsExtension struct { + SupportedSignatureAlgorithms []SignatureScheme +} + +func (e *FakeDelegatedCredentialsExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *FakeDelegatedCredentialsExtension) Len() int { + return 6 + 2*len(e.SupportedSignatureAlgorithms) +} + +func (e *FakeDelegatedCredentialsExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // https://datatracker.ietf.org/doc/html/draft-ietf-tls-subcerts-15#section-4.1.1 + b[0] = byte(fakeExtensionDelegatedCredentials >> 8) + b[1] = byte(fakeExtensionDelegatedCredentials) + b[2] = byte((2 + 2*len(e.SupportedSignatureAlgorithms)) >> 8) + b[3] = byte((2 + 2*len(e.SupportedSignatureAlgorithms))) + b[4] = byte((2 * len(e.SupportedSignatureAlgorithms)) >> 8) + b[5] = byte((2 * len(e.SupportedSignatureAlgorithms))) + for i, sigAndHash := range e.SupportedSignatureAlgorithms { + b[6+2*i] = byte(sigAndHash >> 8) + b[7+2*i] = byte(sigAndHash) + } + return e.Len(), io.EOF +} + +func (e *FakeDelegatedCredentialsExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + //https://datatracker.ietf.org/doc/html/draft-ietf-tls-subcerts-15#section-4.1.1 + var supportedAlgs cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&supportedAlgs) || supportedAlgs.Empty() { + return 0, errors.New("unable to read signature algorithms extension data") + } + supportedSignatureAlgorithms := []SignatureScheme{} + for !supportedAlgs.Empty() { + var sigAndAlg uint16 + if !supportedAlgs.ReadUint16(&sigAndAlg) { + return 0, errors.New("unable to read signature algorithms extension data") + } + supportedSignatureAlgorithms = append( + supportedSignatureAlgorithms, SignatureScheme(sigAndAlg)) + } + e.SupportedSignatureAlgorithms = supportedSignatureAlgorithms + return fullLen, nil +} + +// Implementation copied from SignatureAlgorithmsExtension.UnmarshalJSON +func (e *FakeDelegatedCredentialsExtension) UnmarshalJSON(data []byte) error { + var signatureAlgorithms struct { + Algorithms []string `json:"supported_signature_algorithms"` + } + if err := json.Unmarshal(data, &signatureAlgorithms); err != nil { + return err + } + + for _, sigScheme := range signatureAlgorithms.Algorithms { + if sigScheme == "GREASE" { + e.SupportedSignatureAlgorithms = append(e.SupportedSignatureAlgorithms, GREASE_PLACEHOLDER) + continue + } + + if scheme, ok := dicttls.DictSignatureSchemeNameIndexed[sigScheme]; ok { + e.SupportedSignatureAlgorithms = append(e.SupportedSignatureAlgorithms, SignatureScheme(scheme)) + } else { + return fmt.Errorf("unknown delegated credentials signature scheme: %s", sigScheme) + } + } + return nil +} diff --git a/backend/vendor/github.com/exaring/ja4plus/.gitignore b/backend/vendor/github.com/exaring/ja4plus/.gitignore new file mode 100644 index 0000000..d4554c4 --- /dev/null +++ b/backend/vendor/github.com/exaring/ja4plus/.gitignore @@ -0,0 +1,3 @@ +.aider* + +*.tmp \ No newline at end of file diff --git a/backend/vendor/github.com/exaring/ja4plus/LICENSE b/backend/vendor/github.com/exaring/ja4plus/LICENSE new file mode 100644 index 0000000..9ca2d3e --- /dev/null +++ b/backend/vendor/github.com/exaring/ja4plus/LICENSE @@ -0,0 +1,7 @@ +Copyright 2025 exaring AG + +Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/backend/vendor/github.com/exaring/ja4plus/README.md b/backend/vendor/github.com/exaring/ja4plus/README.md new file mode 100644 index 0000000..3bc82fd --- /dev/null +++ b/backend/vendor/github.com/exaring/ja4plus/README.md @@ -0,0 +1,25 @@ +[![Tests](https://github.com/exaring/ja4plus/actions/workflows/ci.yml/badge.svg)](https://github.com/exaring/ja4plus/actions/workflows/main.yaml) +[![Docs](https://pkg.go.dev/badge/github.com/exaring/ja4plus.svg)](https://pkg.go.dev/github.com/exaring/ja4plus) +[![Report Card](https://goreportcard.com/badge/github.com/exaring/ja4plus)](https://goreportcard.com/report/github.com/exaring/ja4plus) + +# JA4Plus + +ja4plus logo + +JA4Plus is a go library for generating [ja4+ fingerprints](https://github.com/FoxIO-LLC/ja4). + +## Overview + +JA4Plus currently offers a single fingerprinting function: +- **JA4**: Fingerprint based on [TLS ClientHello](https://pkg.go.dev/crypto/tls#ClientHelloInfo) information. + +Contributions are welcome for the other fingerprints in the family 😉 + +### Omission of JA4H + +The JA4H hash, based on properties of the HTTP request, cannot currently be easily implemented in go, since it requires +headers to be observed in the order sent by the client. See e.g.: https://go.dev/issue/24375 + +## Examples + +For example usage, checkou out [examples_test.go](./examples_test.go). \ No newline at end of file diff --git a/backend/vendor/github.com/exaring/ja4plus/ja4plus.go b/backend/vendor/github.com/exaring/ja4plus/ja4plus.go new file mode 100644 index 0000000..76ed938 --- /dev/null +++ b/backend/vendor/github.com/exaring/ja4plus/ja4plus.go @@ -0,0 +1,154 @@ +package ja4plus + +import ( + "crypto/sha256" + "crypto/tls" + "encoding/binary" + "encoding/hex" + "fmt" + "slices" + "strings" +) + +// greaseFilter returns true if the provided value is a GREASE entry as defined in +// https://www.rfc-editor.org/rfc/rfc8701.html +func greaseFilter(suite uint16) bool { + return suite&0x000F == 0x000A && // low word is 0x*A + suite>>8 == (suite&0x00FF) // high word is equal to low word +} + +// JA4 generates a JA4 fingerprint from the given [tls.ClientHelloInfo]. +// It extracts TLS Version, Cipher Suites, Extensions, and ALPN Protocols. +func JA4(hello *tls.ClientHelloInfo) string { + out := make([]byte, 0, 36) + + // Determine protocol type based on the network type + if hello.Conn != nil { + switch hello.Conn.LocalAddr().Network() { + case "udp", "sctp": + out = append(out, 'd') + case "quic": + out = append(out, 'q') + default: + out = append(out, 't') + } + } else { + out = append(out, 't') + } + + // Extract TLS version + supportedVersions := slices.DeleteFunc(slices.Sorted(slices.Values(hello.SupportedVersions)), greaseFilter) + switch supportedVersions[len(supportedVersions)-1] { + case tls.VersionTLS10: + out = append(out, '1', '0') + case tls.VersionTLS11: + out = append(out, '1', '1') + case tls.VersionTLS12: + out = append(out, '1', '2') + case tls.VersionTLS13: + out = append(out, '1', '3') + case tls.VersionSSL30: // deprecated, but still seen in the wild + out = append(out, 's', '3') + case 0x0002: // unsupported by go; still seen in the wild + out = append(out, 's', '2') + case 0xfeff: // DTLS 1.0 + out = append(out, 'd', '1') + case 0xfefd: // DTLS 1.2 + out = append(out, 'd', '2') + case 0xfefc: // DTLS 1.3 + out = append(out, 'd', '3') + default: + out = append(out, '0', '0') + } + + // Check for presence of SNI + if hello.ServerName != "" { + out = append(out, 'd') + } else { + out = append(out, 'i') + } + + // Count cipher suites; copy to avoid modifying the original + filteredCipherSuites := slices.DeleteFunc(slices.Clone(hello.CipherSuites), greaseFilter) + out = fmt.Appendf(out, "%02d", min(len(filteredCipherSuites), 99)) + + // Count extensions; copy to avoid modifying the original + filteredExtensions := slices.DeleteFunc(slices.Clone(hello.Extensions), greaseFilter) + out = fmt.Appendf(out, "%02d", min(len(filteredExtensions), 99)) + + // Extract first ALPN value + var firstALPN string + for _, proto := range hello.SupportedProtos { + // Protocols are tecnically strings, but grease values are 2-byte non-printable, so we convert. + // see: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#alpn-protocol-ids + if len(proto) >= 2 && !greaseFilter(binary.BigEndian.Uint16([]byte(proto[:2]))) { + firstALPN = proto + break + } + } + if firstALPN != "" { + out = append(out, firstALPN[0], firstALPN[len(firstALPN)-1]) + } else { + out = append(out, '0', '0') + } + + out = append(out, '_') + + out = hex.AppendEncode(out, cipherSuiteHash(filteredCipherSuites)) + + out = append(out, '_') + + out = hex.AppendEncode(out, extensionHash(filteredExtensions, hello.SignatureSchemes)) + + return string(out) +} + +// cipherSuiteHash computes the truncated SHA256 of sorted cipher suites. +// The input must be filtered for GREASE values. +// The return value is an unencoded byte slice of the hash. +func cipherSuiteHash(filteredCipherSuites []uint16) []byte { + if len(filteredCipherSuites) > 0 { + slices.Sort(filteredCipherSuites) + cipherSuiteList := make([]string, 0, len(filteredCipherSuites)) + for _, suite := range filteredCipherSuites { + cipherSuiteList = append(cipherSuiteList, fmt.Sprintf("%04x", suite)) + } + cipherSuiteHash := sha256.Sum256([]byte(strings.Join(cipherSuiteList, ","))) + return cipherSuiteHash[:6] + } else { + return []byte{0, 0, 0, 0, 0, 0} + } +} + +// extensionHash computes the truncated SHA256 of sorted and filtered extensions and unsorted signature algorithms. +// The provided extensions must be filtered for GREASE values. +// It sorts the provided extensions in-place. +// The return value is an unencoded byte slice of the hash. +func extensionHash(filteredExtensions []uint16, signatureSchemes []tls.SignatureScheme) []byte { + slices.Sort(filteredExtensions) + extensionsList := make([]string, 0, len(filteredExtensions)) + for _, ext := range filteredExtensions { + // SNI and ALPN are counted above, but MUST be ignored for the hash. + if ext == 0x0000 /* SNI */ || ext == 0x0010 /* ALPN */ { + continue + } + extensionsList = append(extensionsList, fmt.Sprintf("%04x", ext)) + } + if len(extensionsList) == 0 { + return []byte{0, 0, 0, 0, 0, 0} + } + + extensionsListRendered := strings.Join(extensionsList, ",") + if len(signatureSchemes) > 0 { + signatureSchemeList := make([]string, 0, len(signatureSchemes)) + for _, sig := range signatureSchemes { + if greaseFilter(uint16(sig)) { + continue + } + signatureSchemeList = append(signatureSchemeList, fmt.Sprintf("%04x", uint16(sig))) + } + extensionsListRendered += "_" + strings.Join(signatureSchemeList, ",") + } + extensionsHash := sha256.Sum256([]byte(extensionsListRendered)) + return extensionsHash[:6] +} diff --git a/backend/vendor/github.com/exaring/ja4plus/logo.png b/backend/vendor/github.com/exaring/ja4plus/logo.png new file mode 100644 index 0000000000000000000000000000000000000000..c231d8042f02bdfef28cebf066eaf7de5d2a408b GIT binary patch literal 237884 zcma&N1yEdFvo<=w;O-8CyAv4P-6gntkPsxeyAB@Q-5r9vBsc^Qp5X4z&-=ZnPW|`Z 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z@DE$tnjIMTvgrVyuHf40s_;3_5qSgNK*qi^_C0^|bG`sxA@{?lI6E|%* z|JVAT?X7VsZa~v3zU^5HXvF5A4ZG*9_&5J=*Z&;&fB#}WvyMPbs>0rw)Lr~%GrDVH JfV}M-_utXWT6+Kh literal 0 HcmV?d00001 diff --git a/backend/vendor/github.com/exaring/ja4plus/middlewares.go b/backend/vendor/github.com/exaring/ja4plus/middlewares.go new file mode 100644 index 0000000..69c3b1f --- /dev/null +++ b/backend/vendor/github.com/exaring/ja4plus/middlewares.go @@ -0,0 +1,67 @@ +package ja4plus + +import ( + "context" + "crypto/tls" + "net" + "net/http" + "sync" +) + +// JA4Middleware is a helper to plug the JA4 fingerprinting into your HTTP server. +// It only exists because there is no direct way to pass information from the TLS handshake to the HTTP handler. +// Usage: +// +// ja4middleware := ja4plus.JA4Middleware{} +// srv := http.Server{ +// Handler: ja4middleware.Wrap(...), +// TLSConfig: &tls.Config{ +// GetConfigForClient: func(chi *tls.ClientHelloInfo) (*tls.Config, error) { +// ja4middleware.StoreFingerprintFromClientHello(chi) +// return nil, nil +// }, +// }, +// ConnState: ja4middleware.ConnStateCallback, +// } +// srv.ListenAndServeTLS("cert.pem", "key.pem") +// +// Afterwards the fingerprint can be accessed via [JA4FromContext] +type JA4Middleware struct { + connectionFingerprints sync.Map +} + +// StoreFingerprintFromClientHello stores the JA4 fingerprint of the provided [tls.ClientHelloInfo] in the middleware. +func (m *JA4Middleware) StoreFingerprintFromClientHello(hello *tls.ClientHelloInfo) { + m.connectionFingerprints.Store(hello.Conn.RemoteAddr().String(), JA4(hello)) +} + +// ConnStateCallback is a callback that should be set as the [http.Server]'s ConnState to clean up the fingerprint cache. +func (m *JA4Middleware) ConnStateCallback(conn net.Conn, state http.ConnState) { + switch state { + case http.StateClosed, http.StateHijacked: + m.connectionFingerprints.Delete(conn.RemoteAddr().String()) + } +} + +type ja4FingerprintCtxKey struct{} + +// Wrap wraps the provided [http.Handler] and injects the JA4 fingerprint into the [http.Request.Context]. +// It requires a server set up with [JA4Middleware] to work. +func (m *JA4Middleware) Wrap(next http.Handler) http.Handler { + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + ctx := r.Context() + if cacheEntry, _ := m.connectionFingerprints.Load(r.RemoteAddr); cacheEntry != nil { + ctx = context.WithValue(ctx, ja4FingerprintCtxKey{}, cacheEntry.(string)) + } + next.ServeHTTP(w, r.WithContext(ctx)) + }) +} + +// JA4FromContext extracts the JA4 fingerprint from the provided [http.Request.Context]. +// It requires a server set up with [JA4Middleware] to work. +func JA4FromContext(ctx context.Context) string { + if fingerprint, ok := ctx.Value(ja4FingerprintCtxKey{}).(string); ok { + return fingerprint + } + return "" +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/.deepsource.toml b/backend/vendor/github.com/gaukas/clienthellod/.deepsource.toml new file mode 100644 index 0000000..ed50a2d --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/.deepsource.toml @@ -0,0 +1,12 @@ +version = 1 + +test_patterns = ["**/*_test.go"] + +[[analyzers]] +name = "go" + + [analyzers.meta] + import_root = "github.com/gaukas/clienthellod" + +[[transformers]] +name = "gofumpt" \ No newline at end of file diff --git a/backend/vendor/github.com/gaukas/clienthellod/.gitignore b/backend/vendor/github.com/gaukas/clienthellod/.gitignore new file mode 100644 index 0000000..c0548da --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/.gitignore @@ -0,0 +1,133 @@ +# Byte-compiled / optimized / DLL files +__pycache__/ +*.py[cod] +*$py.class + +# C extensions +*.so + +# Distribution / packaging +.Python +build/ +develop-eggs/ +dist/ +downloads/ +eggs/ +.eggs/ +lib/ +lib64/ +parts/ +sdist/ +var/ +wheels/ +pip-wheel-metadata/ +share/python-wheels/ +*.egg-info/ +.installed.cfg +*.egg +MANIFEST + +# PyInstaller +# Usually these files are written by a python script from a template +# before PyInstaller builds the exe, so as to inject date/other infos into it. +*.manifest +*.spec + +# Installer logs +pip-log.txt +pip-delete-this-directory.txt + +# Unit test / coverage reports +htmlcov/ +.tox/ +.nox/ +.coverage +.coverage.* +.cache +nosetests.xml +coverage.xml +*.cover +*.py,cover +.hypothesis/ +.pytest_cache/ + +# Translations +*.mo +*.pot + +# Django stuff: +*.log +local_settings.py +db.sqlite3 +db.sqlite3-journal + +# Flask stuff: +instance/ +.webassets-cache + +# Scrapy stuff: +.scrapy + +# Sphinx documentation +docs/_build/ + +# PyBuilder +target/ + +# Jupyter Notebook +.ipynb_checkpoints + +# IPython +profile_default/ +ipython_config.py + +# pyenv +.python-version + +# pipenv +# According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control. +# However, in case of collaboration, if having platform-specific dependencies or dependencies +# having no cross-platform support, pipenv may install dependencies that don't work, or not +# install all needed dependencies. +#Pipfile.lock + +# PEP 582; used by e.g. github.com/David-OConnor/pyflow +__pypackages__/ + +# Celery stuff +celerybeat-schedule +celerybeat.pid + +# SageMath parsed files +*.sage.py + +# Environments +.env +.venv +env/ +venv/ +ENV/ +env.bak/ +venv.bak/ + +# Spyder project settings +.spyderproject +.spyproject + +# Rope project settings +.ropeproject + +# mkdocs documentation +/site + +# mypy +.mypy_cache/ +.dmypy.json +dmypy.json + +# Pyre type checker +.pyre/ + +# Caddy binary +*/caddy +caddy \ No newline at end of file diff --git a/backend/vendor/github.com/gaukas/clienthellod/LICENSE b/backend/vendor/github.com/gaukas/clienthellod/LICENSE new file mode 100644 index 0000000..261eeb9 --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/backend/vendor/github.com/gaukas/clienthellod/README.md b/backend/vendor/github.com/gaukas/clienthellod/README.md new file mode 100644 index 0000000..d0e12c1 --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/README.md @@ -0,0 +1,156 @@ +# clienthellod +![Go Build Status](https://github.com/gaukas/clienthellod/actions/workflows/go.yml/badge.svg) +[![Go Report Card](https://goreportcard.com/badge/github.com/gaukas/clienthellod)](https://goreportcard.com/report/github.com/gaukas/clienthellod) +[![DeepSource](https://app.deepsource.com/gh/gaukas/clienthellod.svg/?label=active+issues&show_trend=true&token=GugDSBnYAxAF25QNpfyAO5d2)](https://app.deepsource.com/gh/gaukas/clienthellod/) +[![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2Fgaukas%2Fclienthellod.svg?type=shield&issueType=license)](https://app.fossa.com/projects/git%2Bgithub.com%2Fgaukas%2Fclienthellod?ref=badge_shield&issueType=license) + +ClientHello Parser/Resolver as a Service from [tlsfingerprint.io](https://tlsfingerprint.io). + +## What does it do + +`clienthellod`, read as "client hello DEE", is a service that parses and resolves the ClientHello message sent by the client to the server. It is a part of the TLS fingerprintability research project which spans [tlsfingerprint.io](https://tlsfingerprint.io) and [quic.tlsfingerprint.io](https://quic.tlsfingerprint.io). It parses the ClientHello messages sent by TLS clients and QUIC Client Initial Packets sent by QUIC clients and display the parsed information in a human-readable format with high programmability. + +See [tlsfingerprint.io](https://tlsfingerprint.io) and [quic.tlsfingerprint.io](https://quic.tlsfingerprint.io) for more details about the project. + +## How to use + +`clienthellod` is provided as a Go library in the root directory of this repository. + +### Quick Start + +#### TLS ClientHello + +```go + tcpLis, err := net.Listen("tcp", ":443") + defer tcpLis.Close() + + conn, err := tcpLis.Accept() + if err != nil { + panic(err) + } + defer conn.Close() + + ch, err := clienthellod.ReadClientHello(conn) // saves ClientHello + if err != nil { + panic(err) + } + + err := ch.ParseClientHello() // parses ClientHello's fields + if err != nil { + panic(err) + } + + jsonB, err = json.MarshalIndent(ch, "", " ") + if err != nil { + panic(err) + } + + fmt.Println(string(jsonB)) + fmt.Println("ClientHello ID: " + ch.FingerprintID(false)) // prints ClientHello's original fingerprint ID, as TLS extension IDs in their provided order + fmt.Println("ClientHello NormID: " + ch.FingerprintID(true)) // prints ClientHello's normalized fingerprint ID, as TLS extension IDs in a sorted order +``` + +#### QUIC Client Initial Packet + +```go + udpConn, err := net.ListenUDP("udp", ":443") + defer udpConn.Close() + + buf := make([]byte, 65535) + n, addr, err := udpConn.ReadFromUDP(buf) + if err != nil { + panic(err) + } + + cip, err := clienthellod.ParseQUICCIP(buf[:n]) // reads in and parses QUIC Client Initial Packet + if err != nil { + panic(err) + } + + jsonB, err = json.MarshalIndent(cip, "", " ") + if err != nil { + panic(err) + } + + fmt.Println(string(jsonB)) // including fingerprint IDs of: ClientInitialPacket, QUIC Header, QUIC ClientHello, QUIC Transport Parameters' combination +``` + +#### Use with Caddy + +`clienthellod` is also provided as a Caddy plugin, `modcaddy`, which can be used to capture ClientHello messages and QUIC Client Initial Packets. See Section [modcaddy](#modcaddy) for more details. + +## modcaddy + +`modcaddy` is a Caddy plugin that provides: +- An caddy `app` that can be used to temporarily store captured ClientHello messages and QUIC Client Initial Packets. +- A caddy `handler` that can be used to serve the ClientHello messages and QUIC Client Initial Packets to the client sending the request. +- A caddy `listener` that can be used to capture ClientHello messages and QUIC Client Initial Packets. + +You will need to use [xcaddy](https://github.com/caddyserver/xcaddy) to rebuild Caddy with `modcaddy` included. + +It is worth noting that some web browsers may not choose to switch to QUIC protocol in localhost environment, which may result in the QUIC Client Initial Packet not being sent and therefore not being captured/analyzed. + +### Build + +```bash +xcaddy build --with github.com/gaukas/clienthellod/modcaddy +``` + +#### When build locally with changes + +```bash +xcaddy build --with github.com/gaukas/clienthellod/modcaddy --with github.com/gaukas/clienthellod/=./ +``` + +### Caddyfile + +A sample Caddyfile is provided below. + +```Caddyfile +{ + # debug # for debugging purpose + # https_port 443 # currently, QUIC listener works only on port 443, otherwise you need to make changes to the code + order clienthellod before file_server # make sure it hits handler before file_server + clienthellod { # app (reservoir) + validfor 120s 30s # params: validFor [cleanEvery] # increased for QUIC + } + servers { + listener_wrappers { + clienthellod { # listener + tcp # listens for TCP and saves TLS ClientHello + udp # listens for UDP and saves QUIC Client Initial Packet + } + tls + } + # protocols h3 + } +} + +1.mydomain.com { + # tls internal + clienthellod { # handler + # quic # mutually exclusive with tls + tls # listener_wrappers.clienthellod.tcp must be set + } + file_server { + root /var/www/html + } +} + +2.mydomain.com { + # tls internal + clienthellod { # handler + quic # listener_wrappers.clienthellod.udp must be set + # tls # mutually exclusive with quic + } + file_server { + root /var/www/html + } +} +``` + +## License + +This project is developed and distributed under Apache-2.0 license. + +[![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2Fgaukas%2Fclienthellod.svg?type=large&issueType=license)](https://app.fossa.com/projects/git%2Bgithub.com%2Fgaukas%2Fclienthellod?ref=badge_large&issueType=license) diff --git a/backend/vendor/github.com/gaukas/clienthellod/SECURITY.md b/backend/vendor/github.com/gaukas/clienthellod/SECURITY.md new file mode 100644 index 0000000..beda58c --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/SECURITY.md @@ -0,0 +1,7 @@ +# Security Policy + +## Reporting a Vulnerability + +Use the form [here](https://github.com/gaukas/clienthellod/security/advisories/new) to report a vulnerability privately to the developers of this project. + +For low-severity or other impractical vulnerabilities, you may feel free to open an issue to discuss it. diff --git a/backend/vendor/github.com/gaukas/clienthellod/clienthello.go b/backend/vendor/github.com/gaukas/clienthellod/clienthello.go new file mode 100644 index 0000000..61c4930 --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/clienthello.go @@ -0,0 +1,351 @@ +package clienthellod + +import ( + "crypto/sha1" // skipcq: GSC-G505 + "encoding/binary" + "encoding/hex" + "errors" + "fmt" + "io" + "sort" + + "github.com/gaukas/clienthellod/internal/utils" + "github.com/gaukas/godicttls" + tls "github.com/refraction-networking/utls" + "golang.org/x/crypto/cryptobyte" +) + +type ClientHello struct { + raw []byte + + TLSRecordVersion uint16 `json:"tls_record_version"` // TLS record version (major, minor) + TLSHandshakeVersion uint16 `json:"tls_handshake_version"` // TLS handshake version (major, minor) + + CipherSuites []uint16 `json:"cipher_suites"` + CompressionMethods utils.Uint8Arr `json:"compression_methods"` + Extensions []uint16 `json:"extensions"` // extension IDs in original order + ExtensionsNormalized []uint16 `json:"extensions_normalized"` // sorted extension IDs + + ServerName string `json:"server_name"` // server_name(0) + NamedGroupList []uint16 `json:"supported_groups"` // supported_groups(10) a.k.a elliptic_curves + ECPointFormatList utils.Uint8Arr `json:"ec_point_formats"` // ec_point_formats(11) + SignatureSchemeList []uint16 `json:"signature_algorithms"` // signature_algorithms(13) + ALPN []string `json:"alpn"` // alpn(16) + CertCompressAlgo []uint16 `json:"compress_certificate"` // compress_certificate(27) + RecordSizeLimit utils.Uint8Arr `json:"record_size_limit"` // record_size_limit(28) + SupportedVersions []uint16 `json:"supported_versions"` // supported_versions(43) + PSKKeyExchangeModes utils.Uint8Arr `json:"psk_key_exchange_modes"` // psk_key_exchange_modes(45) + KeyShare []uint16 `json:"key_share"` // key_share(51) + ApplicationSettings []string `json:"application_settings"` // application_settings(17513) a.k.a ALPS + + UserAgent string `json:"user_agent,omitempty"` // User-Agent header, set by the caller + + NID int64 `json:"nid,omitempty"` // NID of the fingerprint + NormNID int64 `json:"norm_nid,omitempty"` // Normalized NID of the fingerprint + ID string `json:"id,omitempty"` // ID of the fingerprint (hex string) + NormID string `json:"norm_id,omitempty"` // Normalized ID of the fingerprint (hex string) + + // below are ONLY used for calculating the fingerprint (hash) + lengthPrefixedSupportedGroups []uint16 + lengthPrefixedEcPointFormats []uint8 + lengthPrefixedSignatureAlgos []uint16 + alpnWithLengths []uint8 + lengthPrefixedCertCompressAlgos []uint8 + keyshareGroupsWithLengths []uint16 + // _nid int64 + // norm_nid int64 + + // QUIC-only + qtp *QUICTransportParameters +} + +// ReadClientHello reads a ClientHello from a connection (io.Reader) +// and returns a ClientHello struct. +// +// It will return an error if the reader does not give a stream of bytes +// representing a valid ClientHello. But all bytes read from the reader +// will be stored in the ClientHello struct to be rewinded by the caller. +func ReadClientHello(r io.Reader) (ch *ClientHello, err error) { + ch = new(ClientHello) + // Read a TLS record + // Read exactly 5 bytes from the reader + ch.raw = make([]byte, 5) + if _, err = io.ReadFull(r, ch.raw); err != nil { + return + } + + // Check if the first byte is 0x16 (TLS Handshake) + if ch.raw[0] != 0x16 { + err = errors.New("not a TLS handshake record") + return + } + + // Read exactly length bytes from the reader + ch.raw = append(ch.raw, make([]byte, binary.BigEndian.Uint16(ch.raw[3:5]))...) + _, err = io.ReadFull(r, ch.raw[5:]) + return +} + +func (ch *ClientHello) Raw() []byte { + return ch.raw +} + +// ParseClientHello parses the raw bytes of a ClientHello into a ClientHello struct. +func (ch *ClientHello) ParseClientHello() error { + // Call uTLS to parse the raw bytes into ClientHelloSpec + fingerprinter := tls.Fingerprinter{ + AllowBluntMimicry: true, // we will need all the extensions even when not recognized + } + chs, err := fingerprinter.RawClientHello(ch.raw) + if err != nil { + return fmt.Errorf("failed to parse ClientHello, (*tls.Fingerprinter).RawClientHello(): %w", err) + } + + // ch.TLSRecordVersion = chs.TLSVersMin // won't work for TLS 1.3 + // ch.TLSHandshakeVersion = chs.TLSVersMax // won't work for TLS 1.3 + ch.CipherSuites = chs.CipherSuites + ch.CompressionMethods = chs.CompressionMethods + + // parse extensions + ch.parseExtensions(chs) + + // Call uTLS to parse the raw bytes into ClientHelloMsg + chm := tls.UnmarshalClientHello(ch.raw[5:]) + if chm == nil { + return errors.New("failed to parse ClientHello, (*tls.ClientHelloInfo).Unmarshal(): nil") + } + ch.ServerName = chm.ServerName + + // In the end parse extra information from raw + return ch.parseExtra() +} + +func (ch *ClientHello) parseExtensions(chs *tls.ClientHelloSpec) { + for _, ext := range chs.Extensions { + switch ext := ext.(type) { + case *tls.SupportedCurvesExtension: + for _, curve := range ext.Curves { + ch.NamedGroupList = append(ch.NamedGroupList, uint16(curve)) + } + ch.lengthPrefixedSupportedGroups = append(ch.lengthPrefixedSupportedGroups, 2*uint16(len(ch.NamedGroupList))) + ch.lengthPrefixedSupportedGroups = append(ch.lengthPrefixedSupportedGroups, ch.NamedGroupList...) + case *tls.SupportedPointsExtension: + ch.ECPointFormatList = ext.SupportedPoints + ch.lengthPrefixedEcPointFormats = append(ch.lengthPrefixedEcPointFormats, uint8(len(ext.SupportedPoints))) + ch.lengthPrefixedEcPointFormats = append(ch.lengthPrefixedEcPointFormats, ext.SupportedPoints...) + case *tls.SignatureAlgorithmsExtension: + for _, sig := range ext.SupportedSignatureAlgorithms { + ch.SignatureSchemeList = append(ch.SignatureSchemeList, uint16(sig)) + } + ch.lengthPrefixedSignatureAlgos = append(ch.lengthPrefixedSignatureAlgos, 2*uint16(len(ch.SignatureSchemeList))) + ch.lengthPrefixedSignatureAlgos = append(ch.lengthPrefixedSignatureAlgos, ch.SignatureSchemeList...) + case *tls.ALPNExtension: + ch.ALPN = ext.AlpnProtocols + // we will get alpnWithLengths from raw + case *tls.UtlsCompressCertExtension: + for _, algo := range ext.Algorithms { + ch.CertCompressAlgo = append(ch.CertCompressAlgo, uint16(algo)) + } + ch.lengthPrefixedCertCompressAlgos = append(ch.lengthPrefixedCertCompressAlgos, 2*uint8(len(ch.CertCompressAlgo))) + ch.lengthPrefixedCertCompressAlgos = append( + ch.lengthPrefixedCertCompressAlgos, + utils.Uint16ToUint8(ch.CertCompressAlgo)..., + ) + case *tls.FakeRecordSizeLimitExtension: + ch.RecordSizeLimit = append(ch.RecordSizeLimit, uint8(ext.Limit>>8), uint8(ext.Limit)) + case *tls.SupportedVersionsExtension: + for _, ver := range ext.Versions { + ch.SupportedVersions = append(ch.SupportedVersions, uint16(ver)) + } + case *tls.PSKKeyExchangeModesExtension: + ch.PSKKeyExchangeModes = ext.Modes + case *tls.KeyShareExtension: + for _, ks := range ext.KeyShares { + ch.KeyShare = append(ch.KeyShare, uint16(ks.Group)) + // get below from raw instead + // ch.keyshareGroupsWithLengths = append(ch.keyshareGroupsWithLengths, uint16(ks.Group)) + // ch.keyshareGroupsWithLengths = append(ch.keyshareGroupsWithLengths, uint16(len(ks.Data))) + } + case *tls.ApplicationSettingsExtension: + ch.ApplicationSettings = ext.SupportedProtocols + case *tls.GenericExtension: + if ext.Id == godicttls.ExtType_quic_transport_parameters { + ch.qtp = ParseQUICTransportParameters(ext.Data) + } + } + } +} + +// parseExtra parses extra information from raw bytes which couldn't be parsed by uTLS. +func (ch *ClientHello) parseExtra() error { + // parse alpnWithLengths and Extensions + s := cryptobyte.String(ch.raw) + var recordVersion uint16 + if !s.Skip(1) || !s.ReadUint16(&recordVersion) || !s.Skip(2) { // skip TLS record header + return errors.New("failed to parse TLS header, cryptobyte.String().Skip(): false") + } + ch.TLSRecordVersion = recordVersion + var handshakeVersion uint16 + if !s.Skip(1) || // skip Handshake type + !s.Skip(3) || // skip Handshake length + !s.ReadUint16(&handshakeVersion) || // parse ClientHello version + !s.Skip(32) { // skip ClientHello random + return errors.New("failed to parse ClientHello, cryptobyte.String().Skip(): false") + } + ch.TLSHandshakeVersion = handshakeVersion + + var ignoredSessionID cryptobyte.String + if !s.ReadUint8LengthPrefixed(&ignoredSessionID) { + return errors.New("unable to read session id") + } + + var ignoredCipherSuites cryptobyte.String + if !s.ReadUint16LengthPrefixed(&ignoredCipherSuites) { + return errors.New("unable to read ciphersuites") + } + + var ignoredCompressionMethods cryptobyte.String + if !s.ReadUint8LengthPrefixed(&ignoredCompressionMethods) { + return errors.New("unable to read compression methods") + } + + if s.Empty() { + return nil // no extensions + } + + var extensions cryptobyte.String + if !s.ReadUint16LengthPrefixed(&extensions) { + return errors.New("unable to read extensions data") + } + + err := ch.parseExtensionsExtra(extensions) + if err != nil { + return fmt.Errorf("failed to parse extensions, parseExtensionsExtra(): %w", err) + } + + // sort ch.Extensions and put result to ch.ExtensionsNormalized + ch.ExtensionsNormalized = make([]uint16, len(ch.Extensions)) + copy(ch.ExtensionsNormalized, ch.Extensions) + sort.Slice(ch.ExtensionsNormalized, func(i, j int) bool { + return ch.ExtensionsNormalized[i] < ch.ExtensionsNormalized[j] + }) + + return nil +} + +func (ch *ClientHello) parseExtensionsExtra(extensions cryptobyte.String) error { + var extensionIDs []uint16 + for !extensions.Empty() { + var extensionID uint16 + var extensionData cryptobyte.String + if !extensions.ReadUint16(&extensionID) { + return errors.New("unable to read extension ID") + } + if !extensions.ReadUint16LengthPrefixed(&extensionData) { + return errors.New("unable to read extension data") + } + + extensionID, err := ch.parseExtensionExtra(extensionID, extensionData) + if err != nil { + return fmt.Errorf("failed to parse extension, parseExtensionExtra(): %w", err) + } + extensionIDs = append(extensionIDs, extensionID) // extension ID might need to be overridden by parseExtensionExtra() in case of GREASE + } + ch.Extensions = extensionIDs + + return nil +} + +func (ch *ClientHello) parseExtensionExtra(extensionID uint16, extensionData cryptobyte.String) (uint16, error) { + switch extensionID { + case 16: // ALPN + ch.alpnWithLengths = extensionData + case 51: // keyshare + if !extensionData.Skip(2) { + return 0, errors.New("unable to skip keyshare total length") + } + for !extensionData.Empty() { + var group uint16 + var length uint16 + if !extensionData.ReadUint16(&group) || !extensionData.ReadUint16(&length) { + return 0, errors.New("unable to read keyshare group") + } + if utils.IsGREASEUint16(group) { + group = tls.GREASE_PLACEHOLDER + } + ch.keyshareGroupsWithLengths = append(ch.keyshareGroupsWithLengths, group) + ch.keyshareGroupsWithLengths = append(ch.keyshareGroupsWithLengths, length) + + if !extensionData.Skip(int(length)) { + return 0, errors.New("unable to skip keyshare data") + } + } + default: + if utils.IsGREASEUint16(extensionID) { + return tls.GREASE_PLACEHOLDER, nil + } + } + + return extensionID, nil +} + +// FingerprintNID calculates fingerprint Numerical ID of ClientHello. +// Fingerprint is defined by +func (ch *ClientHello) FingerprintNID(normalized bool) int64 { + if normalized && ch.NormNID != 0 { + return ch.NormNID + } + + if !normalized && ch.NID != 0 { + return ch.NID + } + + h := sha1.New() // skipcq: GO-S1025, GSC-G401, + binary.Write(h, binary.BigEndian, uint16(ch.TLSRecordVersion)) + binary.Write(h, binary.BigEndian, uint16(ch.TLSHandshakeVersion)) + + updateArr(h, utils.Uint16ToUint8(ch.CipherSuites)) + updateArr(h, ch.CompressionMethods) + if normalized { + updateArr(h, utils.Uint16ToUint8(ch.ExtensionsNormalized)) + } else { + updateArr(h, utils.Uint16ToUint8(ch.Extensions)) + } + updateArr(h, utils.Uint16ToUint8(ch.lengthPrefixedSupportedGroups)) + updateArr(h, ch.lengthPrefixedEcPointFormats) + updateArr(h, utils.Uint16ToUint8(ch.lengthPrefixedSignatureAlgos)) + updateArr(h, ch.alpnWithLengths) + updateArr(h, utils.Uint16ToUint8(ch.keyshareGroupsWithLengths)) + updateArr(h, ch.PSKKeyExchangeModes) + updateArr(h, utils.Uint16ToUint8(ch.SupportedVersions)) + updateArr(h, ch.lengthPrefixedCertCompressAlgos) + updateArr(h, ch.RecordSizeLimit) + + out := int64(binary.BigEndian.Uint64(h.Sum(nil)[:8])) + + if normalized { + // ch.norm_nid = out + ch.NormNID = out + } else { + // ch._nid = out + ch.NID = out + } + + return out +} + +// FingerprintID calculates fingerprint ID of ClientHello and +// represents it as hexadecimal string. +func (ch *ClientHello) FingerprintID(normalized bool) string { + nid := ch.FingerprintNID(normalized) + hid := make([]byte, 8) + binary.BigEndian.PutUint64(hid, uint64(nid)) + + id := hex.EncodeToString(hid) + if normalized { + ch.NormID = id + } else { + ch.ID = id + } + return id +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/fingerprint_hash.go b/backend/vendor/github.com/gaukas/clienthellod/fingerprint_hash.go new file mode 100644 index 0000000..fcb09f5 --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/fingerprint_hash.go @@ -0,0 +1,19 @@ +package clienthellod + +import ( + "encoding/binary" + "hash" +) + +func updateArr(h hash.Hash, arr []byte) { + binary.Write(h, binary.BigEndian, uint32(len(arr))) + h.Write(arr) +} + +func updateU32(h hash.Hash, i uint32) { + binary.Write(h, binary.BigEndian, i) +} + +func updateU64(h hash.Hash, i uint64) { + binary.Write(h, binary.BigEndian, i) +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/internal/utils/arr_dedup.go b/backend/vendor/github.com/gaukas/clienthellod/internal/utils/arr_dedup.go new file mode 100644 index 0000000..1d98988 --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/internal/utils/arr_dedup.go @@ -0,0 +1,22 @@ +package utils + +import "sort" + +type SliceType interface { + ~int | ~int8 | ~int16 | ~int32 | ~int64 | ~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 +} + +func DedupIntArr[T SliceType](arr []T) []T { + // Sort the array + sort.Slice(arr, func(i, j int) bool { return arr[i] < arr[j] }) + + // Dedup + j := 0 + for i := 1; i < len(arr); i++ { + if arr[j] != arr[i] { + j++ + arr[j] = arr[i] + } + } + return arr[:j+1] +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/internal/utils/rewindconn.go b/backend/vendor/github.com/gaukas/clienthellod/internal/utils/rewindconn.go new file mode 100644 index 0000000..ad42299 --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/internal/utils/rewindconn.go @@ -0,0 +1,59 @@ +package utils + +import ( + "bytes" + "errors" + "io" + "net" +) + +// Interface guards +var ( + _ net.Conn = (*rewindConn)(nil) +) + +type rewindConn struct { + net.Conn + reader bytes.Reader +} + +func RewindConn(c net.Conn, buf []byte) (net.Conn, error) { + if c == nil { + return nil, errors.New("cannot rewind nil connection") + } + + if len(buf) == 0 { + return c, nil + } + + return &rewindConn{ + Conn: c, + reader: *bytes.NewReader(buf), + }, nil +} + +// Read is ... +func (c *rewindConn) Read(b []byte) (int, error) { + if c.reader.Size() == 0 { + return c.Conn.Read(b) + } + n, err := c.reader.Read(b) + if errors.Is(err, io.EOF) { + c.reader.Reset([]byte{}) + return n, nil + } + return n, err +} + +// CloseWrite is ... +func (c *rewindConn) CloseWrite() error { + if cc, ok := c.Conn.(*net.TCPConn); ok { + return cc.CloseWrite() + } + if cw, ok := c.Conn.(interface { + CloseWrite() error + }); ok { + return cw.CloseWrite() + } + return errors.New("not supported") +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/internal/utils/rewindreader.go b/backend/vendor/github.com/gaukas/clienthellod/internal/utils/rewindreader.go new file mode 100644 index 0000000..db20dbc --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/internal/utils/rewindreader.go @@ -0,0 +1,43 @@ +package utils + +import ( + "bytes" + "errors" + "io" +) + +// Interface guards +var ( + _ io.Reader = (*rewindReader)(nil) +) + +type rewindReader struct { + io.Reader + rr bytes.Reader +} + +func RewindReader(r io.Reader, buf []byte) io.Reader { + if len(buf) == 0 { + return r + } + + return &rewindReader{ + Reader: r, + rr: *bytes.NewReader(buf), + } +} + +// Read implements io.Reader +// Read is ... +func (c *rewindReader) Read(b []byte) (int, error) { + if c.rr.Size() == 0 { + return c.Reader.Read(b) + } + n, err := c.rr.Read(b) + if errors.Is(err, io.EOF) || c.rr.Len() == 0 { + c.rr.Reset([]byte{}) + n2, err := c.Reader.Read(b[n:]) // read the rest if possible + return n + n2, err + } + return n, err +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/internal/utils/typeconv.go b/backend/vendor/github.com/gaukas/clienthellod/internal/utils/typeconv.go new file mode 100644 index 0000000..7244005 --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/internal/utils/typeconv.go @@ -0,0 +1,10 @@ +package utils + +func Uint16ToUint8(a []uint16) []uint8 { + b := make([]uint8, 0) + for _, v := range a { + b = append(b, uint8(v>>8)) + b = append(b, uint8(v)) + } + return b +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/internal/utils/udppacket.go b/backend/vendor/github.com/gaukas/clienthellod/internal/utils/udppacket.go new file mode 100644 index 0000000..9f59b69 --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/internal/utils/udppacket.go @@ -0,0 +1,16 @@ +package utils + +import ( + "github.com/google/gopacket" + "github.com/google/gopacket/layers" +) + +// ParseUDPPacket parses the IP packet +func ParseUDPPacket(buf []byte) (*layers.UDP, error) { + var udp *layers.UDP = &layers.UDP{} + err := udp.DecodeFromBytes(buf, gopacket.NilDecodeFeedback) + if err != nil { + return nil, err + } + return udp, nil +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/internal/utils/uint8_not_string.go b/backend/vendor/github.com/gaukas/clienthellod/internal/utils/uint8_not_string.go new file mode 100644 index 0000000..0a25b20 --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/internal/utils/uint8_not_string.go @@ -0,0 +1,20 @@ +package utils + +import ( + "fmt" + "strings" +) + +// Uint8Arr redefines how []uint8 is marshalled to JSON +// in order to display it as a list of numbers instead of a string +type Uint8Arr []uint8 + +func (u Uint8Arr) MarshalJSON() ([]byte, error) { + var result string + if u == nil { + result = "[]" + } else { + result = strings.Join(strings.Fields(fmt.Sprintf("%d", u)), ",") + } + return []byte(result), nil +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/internal/utils/utls.go b/backend/vendor/github.com/gaukas/clienthellod/internal/utils/utls.go new file mode 100644 index 0000000..f5208e6 --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/internal/utils/utls.go @@ -0,0 +1,7 @@ +package utils + +func IsGREASEUint16(v uint16) bool { + // First byte is same as second byte + // and lowest nibble is 0xa + return ((v >> 8) == v&0xff) && v&0xf == 0xa +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/quic_client_initial_packet.go b/backend/vendor/github.com/gaukas/clienthellod/quic_client_initial_packet.go new file mode 100644 index 0000000..76570a8 --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/quic_client_initial_packet.go @@ -0,0 +1,72 @@ +package clienthellod + +import ( + "crypto/sha1" // skipcq: GSC-G505 + "encoding/binary" + "encoding/hex" + "errors" + "fmt" +) + +var ErrNoQUICClientHello = errors.New("no QUIC ClientHello found in the packet") + +type ClientInitialPacket struct { + raw []byte + + QHdr *QUICHeader `json:"quic_header,omitempty"` // QUIC header, set by the caller + QCH *QUICClientHello `json:"quic_client_hello,omitempty"` // TLS ClientHello, set by the caller + QTP *QUICTransportParameters `json:"quic_transport_parameters,omitempty"` // QUIC Transport Parameters, set by the caller + + HexID string `json:"cip_fp_id,omitempty"` // normalized + NumericID uint64 `json:"cip_fp_nid,omitempty"` // original + + UserAgent string `json:"user_agent,omitempty"` // User-Agent header, set by the caller +} + +func ParseQUICCIP(p []byte) (*ClientInitialPacket, error) { + qHdr, err := DecodeQUICHeaderAndFrames(p) + if err != nil { + return nil, err + } + qHdr.HID() + + cryptoFrame, err := ReassembleCRYPTOFrames(qHdr.Frames()) + if err != nil { + return nil, err + } + + if len(cryptoFrame) == 0 { + return nil, fmt.Errorf("%w: no CRYPTO frames found in the packet", ErrNoQUICClientHello) + } + + ch, err := ParseQUICClientHello(cryptoFrame) + if err != nil { + return nil, fmt.Errorf("%w, ParseQUICClientHello(): %v", ErrNoQUICClientHello, err) + } + ch.FingerprintID(true) // normalized + ch.FingerprintID(false) // original + if ch.qtp != nil { + ch.qtp.HID() + } else { + return nil, fmt.Errorf("%w: no QUIC Transport Parameters found in the packet", ErrNoQUICClientHello) + } + + // Calculate fp + h := sha1.New() // skipcq: GO-S1025, GSC-G401 + updateU64(h, qHdr.NID()) + updateU64(h, uint64(ch.FingerprintNID(true))) + updateU64(h, ch.qtp.NumericID) + NumericID := binary.BigEndian.Uint64(h.Sum(nil)) + hid := make([]byte, 8) + binary.BigEndian.PutUint64(hid, NumericID) + HexID := hex.EncodeToString(hid) + + return &ClientInitialPacket{ + raw: p, + QHdr: qHdr, + QCH: ch, + QTP: ch.qtp, + NumericID: NumericID, + HexID: HexID, + }, nil +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/quic_clienthello.go b/backend/vendor/github.com/gaukas/clienthellod/quic_clienthello.go new file mode 100644 index 0000000..528e024 --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/quic_clienthello.go @@ -0,0 +1,43 @@ +package clienthellod + +import "bytes" + +type QUICClientHello struct { + ClientHello +} + +func ParseQUICClientHello(p []byte) (*QUICClientHello, error) { + // patch TLS record header to make it a valid TLS record + record := make([]byte, 5+len(p)) + record[0] = 0x16 // TLS handshake + record[1] = 0x00 // Dummy TLS version MSB + record[2] = 0x00 // Dummy TLS version LSB + record[3] = byte(len(p) >> 8) + record[4] = byte(len(p)) + copy(record[5:], p) + + // parse TLS record + r := bytes.NewReader(record) + ch, err := ReadClientHello(r) + if err != nil { + return nil, err + } + + if err = ch.ParseClientHello(); err != nil { + return nil, err + } + + if ch.qtp == nil { + return nil, ErrNotQUICInitialPacket + } + + if ch.qtp.ParseError() != nil { + return nil, ch.qtp.ParseError() + } + + return &QUICClientHello{ClientHello: *ch}, nil +} + +func (qch *QUICClientHello) Raw() []byte { + return qch.ClientHello.Raw()[5:] // strip TLS record header which is added by ParseQUICClientHello +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/quic_common.go b/backend/vendor/github.com/gaukas/clienthellod/quic_common.go new file mode 100644 index 0000000..c6a8a21 --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/quic_common.go @@ -0,0 +1,76 @@ +package clienthellod + +import ( + "bytes" + "errors" + "io" +) + +// ReadNextVLI unpacks the next variable-length integer from the given +// io.Reader. It returns the decoded value and the number of bytes read. +// For example: +// +// 0x0a -> 0xa, 1 +// 0x80 0x10 0x00 0x00 -> 0x100000, 4 +func ReadNextVLI(r io.Reader) (val uint64, n int, err error) { + // read the first byte + var encodedBytes []byte = make([]byte, 1) + _, err = r.Read(encodedBytes) + if err != nil { + return 0, 0, err + } + + // check MSBs of the first byte + switch encodedBytes[0] & 0xc0 { // 0xc0 = 0b11000000, when the first 2 bits in a byte is set + case 0x00: + n = 1 + case 0x40: + n = 2 + case 0x80: + n = 4 + case 0xc0: + n = 8 + default: + return 0, 0, errors.New("invalid first byte") + } + + // read the rest bytes + if n > 1 { + encodedBytes = append(encodedBytes, make([]byte, n-1)...) + _, err = r.Read(encodedBytes[1:]) + if err != nil { + return 0, 0, err + } + } + + // decode + encodedBytes[0] &= 0x3f // 0x3f = 0b00111111, clear MSBs + for i := 0; i < n; i++ { + val <<= 8 + val |= uint64(encodedBytes[i]) + } + + return +} + +func DecodeVLI(vli []byte) (val uint64, err error) { + var n int + val, n, err = ReadNextVLI(bytes.NewReader(vli)) + if err != nil { + return 0, err + } + if n != len(vli) { + return 0, errors.New("invalid VLI length") + } + return +} + +func unsetVLIBits(vli []byte) { + if UNSET_VLI_BITS { + vli[0] &= 0x3f // 0x3f = 0b00111111, clear MSBs + } +} + +func IsGREASETransportParameter(paramType uint64) bool { + return paramType >= 27 && (paramType-27)%31 == 0 // reserved values are 27, 58, 89, ... +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/quic_crypto.go b/backend/vendor/github.com/gaukas/clienthellod/quic_crypto.go new file mode 100644 index 0000000..a48d9ae --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/quic_crypto.go @@ -0,0 +1,124 @@ +package clienthellod + +import ( + "crypto/aes" + "crypto/cipher" + "crypto/sha256" + "errors" + + "golang.org/x/crypto/cryptobyte" + "golang.org/x/crypto/hkdf" +) + +func ClientInitialKeysCalc(initialRandom []byte) (clientKey, clientIV, clientHpKey []byte, err error) { + initialSalt := []byte{ + 0x38, 0x76, 0x2c, 0xf7, + 0xf5, 0x59, 0x34, 0xb3, + 0x4d, 0x17, 0x9a, 0xe6, + 0xa4, 0xc8, 0x0c, 0xad, + 0xcc, 0xbb, 0x7f, 0x0a, + } // magic value, the first SHA-1 collision + + initialSecret := hkdf.Extract(sha256.New, initialRandom, initialSalt) + + clientSecret, err := hkdfExpandLabel(initialSecret, "client in", nil, 32) + if err != nil { + return nil, nil, nil, err + } + clientKey, err = hkdfExpandLabel(clientSecret, "quic key", nil, 16) + if err != nil { + return nil, nil, nil, err + } + clientIV, err = hkdfExpandLabel(clientSecret, "quic iv", nil, 12) + if err != nil { + return nil, nil, nil, err + } + clientHpKey, err = hkdfExpandLabel(clientSecret, "quic hp", nil, 16) + if err != nil { + return nil, nil, nil, err + } + + return +} + +func hkdfExpandLabel(key []byte, label string, context []byte, length uint16) ([]byte, error) { + // see https://tools.ietf.org/html/rfc8446#section-7.1 + // code from crypto/tls + var hkdfLabel cryptobyte.Builder + hkdfLabel.AddUint16(uint16(length)) + hkdfLabel.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes([]byte("tls13 ")) + b.AddBytes([]byte(label)) + }) + hkdfLabel.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(context) + }) + hkdfLabelBytes, err := hkdfLabel.Bytes() + if err != nil { + return nil, err + } + + r := hkdf.Expand(sha256.New, key, hkdfLabelBytes) + out := make([]byte, length) + n, err := r.Read(out) + if err != nil { + return nil, err + } + if n != int(length) { + return nil, errors.New("failed to read all bytes, short read") + } + return out, nil +} + +func ComputeHeaderProtection(clientHpKey, sample []byte) ([]byte, error) { + if len(clientHpKey) != 16 || len(sample) != 16 { + panic("invalid input") + } + + // AES-128-ECB + cipher, err := aes.NewCipher([]byte(clientHpKey)) + if err != nil { + return nil, err + } + + var headerProtection []byte = make([]byte, 16) + cipher.Encrypt(headerProtection, sample) + + return headerProtection[:5], nil +} + +func DecryptAES128GCM(iv []byte, recordNum uint64, key, ciphertext, recdata, authtag []byte) (plaintext []byte, err error) { + buildIV(iv, recordNum) + + if len(iv) != 12 || len(key) != 16 || len(authtag) != 16 { + return nil, errors.New("invalid input") + } + + block, err := aes.NewCipher(key) + if err != nil { + return nil, err + } + + aesgcm, err := cipher.NewGCM(block) + if err != nil { + return nil, err + } + + return aesgcm.Open(nil, iv, append(ciphertext, authtag...), recdata) +} + +// https://quic.xargs.org/files/aes_128_gcm_decrypt.c +// +// static void build_iv(uchar *iv, uint64_t seq) +// +// { +// size_t i; +// for (i = 0; i < 8; i++) { +// iv[gcm_ivlen-1-i] ^= ((seq>>(i*8))&0xFF); +// } +// } +func buildIV(iv []byte, seq uint64) { + for i := 0; i < 8; i++ { + iv[11-i] ^= byte((seq >> (i * 8)) & 0xFF) + } +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/quic_frame.go b/backend/vendor/github.com/gaukas/clienthellod/quic_frame.go new file mode 100644 index 0000000..c822440 --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/quic_frame.go @@ -0,0 +1,178 @@ +package clienthellod + +import ( + "fmt" + "io" + "sort" + + "github.com/gaukas/clienthellod/internal/utils" +) + +const ( + QUICFrame_PADDING uint64 = 0 // 0 + QUICFrame_PING uint64 = 1 // 1 + QUICFrame_CRYPTO uint64 = 6 // 6 +) + +type Frame interface { + // FrameType returns the type of the frame. + FrameType() uint64 + + // ReadReader takes a Reader and reads the rest of the frame from it, + // starting from the first byte after the frame type. + // + // The returned io.Reader contains the rest of the frame, it could be + // the input Reader itself (if no extra bytes are read) or a rewinded + // Reader (if extra bytes are read and rewinding is needed). + ReadReader(io.Reader) (io.Reader, error) +} + +func ReadAllFrames(r io.Reader) ([]Frame, error) { + var frames []Frame = make([]Frame, 0) + + for { + // Frame Type + frameType, _, err := ReadNextVLI(r) + if err != nil { + if err == io.EOF { + return frames, nil + } + return nil, err + } + + // Frame + var frame Frame + switch frameType { + case QUICFrame_PADDING: + frame = &PADDING{} + case QUICFrame_PING: + frame = &PING{} + case QUICFrame_CRYPTO: + frame = &CRYPTO{} + default: + return nil, fmt.Errorf("unknown frame type: 0x%.2x", frameType) + } + + // Read the rest of the frame + r, err = frame.ReadReader(r) + if err != nil { + return nil, err + } + + // Append the frame + frames = append(frames, frame) + } +} + +func ReassembleCRYPTOFrames(frames []Frame) ([]byte, error) { + var cryptoFrames []Frame = make([]Frame, 0) + + // Collect all CRYPTO frames + for _, frame := range frames { + if frame.FrameType() == QUICFrame_CRYPTO { + cryptoFrames = append(cryptoFrames, frame) + } + } + + if len(cryptoFrames) == 0 { + return nil, nil // no CRYPTO frames is not an error + } + + // Sort CRYPTO frames by offset + sort.Slice(cryptoFrames, func(i, j int) bool { + return cryptoFrames[i].(*CRYPTO).Offset < cryptoFrames[j].(*CRYPTO).Offset + }) + + // Reassemble CRYPTO frames + var reassembled []byte = make([]byte, 0) + for _, frame := range cryptoFrames { + if uint64(len(reassembled)) == frame.(*CRYPTO).Offset { + reassembled = append(reassembled, frame.(*CRYPTO).Data...) + } else { + return nil, fmt.Errorf("failed to reassemble CRYPTO frames") + } + } + + return reassembled, nil +} + +// PADDING frame +type PADDING struct { + Length uint64 `json:"length,omitempty"` // count 0x00 bytes until not 0x00 +} + +// FrameType implements Frame interface. +func (*PADDING) FrameType() uint64 { + return QUICFrame_PADDING +} + +// ReadFrom implements Frame interface. It keeps reading until it finds a +// non-zero byte, then the non-zero byte is rewinded back to the reader and +// the reader is returned. +func (f *PADDING) ReadReader(r io.Reader) (rr io.Reader, err error) { + f.Length = 1 // starting from 1, since type is already read + + var b []byte = make([]byte, 1) + for { + _, err = r.Read(b) + if err != nil { + if err == io.EOF { + return r, nil // EOF is not an error, it just means all frames are read + } + return r, err + } + if b[0] != 0x00 { + // rewind the reader + rr = utils.RewindReader(r, b) + return + } + f.Length++ + } +} + +// PING frame +type PING struct{} + +// FrameType implements Frame interface. +func (*PING) FrameType() uint64 { + return QUICFrame_PING +} + +// ReadFrom implements Frame interface. It does nothing and returns the +// input reader. +func (*PING) ReadReader(r io.Reader) (rr io.Reader, err error) { + return r, nil +} + +// CRYPTO frame +type CRYPTO struct { + Offset uint64 `json:"offset,omitempty"` // offset of crypto data, from VLI + Length uint64 `json:"length,omitempty"` // length of crypto data, from VLI + Data []byte `json:"data,omitempty"` // crypto data +} + +// FrameType implements Frame interface. +func (*CRYPTO) FrameType() uint64 { + return QUICFrame_CRYPTO +} + +// ReadFrom implements Frame interface. It reads the offset, length and +// crypto data from the input reader. +func (f *CRYPTO) ReadReader(r io.Reader) (rr io.Reader, err error) { + // Offset + f.Offset, _, err = ReadNextVLI(r) + if err != nil { + return r, err + } + + // Length + f.Length, _, err = ReadNextVLI(r) + if err != nil { + return r, err + } + + // Crypto Data + f.Data = make([]byte, f.Length) + _, err = r.Read(f.Data) + return r, err +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/quic_header.go b/backend/vendor/github.com/gaukas/clienthellod/quic_header.go new file mode 100644 index 0000000..1b86f3e --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/quic_header.go @@ -0,0 +1,215 @@ +package clienthellod + +import ( + "bytes" + "crypto/sha1" // skipcq: GSC-G505 + "encoding/binary" + "encoding/hex" + "errors" + + "github.com/gaukas/clienthellod/internal/utils" + "golang.org/x/crypto/cryptobyte" +) + +const ( + TOKEN_ABSENT uint32 = 0x00000000 + TOKEN_PRESENT uint32 = 0x00000001 +) + +var ( + ErrNotQUICLongHeaderFormat = errors.New("packet is not in QUIC Long Header Format") + ErrNotQUICInitialPacket = errors.New("packet is not a QUIC Initial Packet") +) + +// QUICHeader includes header fields of a QUIC packet and the following +// frames. It is used to calculate the fingerprint of a QUIC Header. +type QUICHeader struct { + Version utils.Uint8Arr `json:"version,omitempty"` // 4-byte version + DCIDLength uint32 `json:"dcid_len,omitempty"` + SCIDLength uint32 `json:"scid_len,omitempty"` + PacketNumber utils.Uint8Arr `json:"pn,omitempty"` // VLI + initialPacketNumberLength uint32 + initialPacketNumber uint64 + + // These two fields are not strictly part of QUIC header, but we need them before parsing QUIC ClientHello + FrameIDs utils.Uint8Arr `json:"frame_id,omitempty"` // sorted + frames []Frame + + Token bool `json:"token,omitempty"` + + HexID string `json:"hdrid,omitempty"` + NumericID uint64 `json:"hdrnid,omitempty"` +} + +// DecodeQUICHeaderAndFrames decodes a QUIC initial packet and returns a QUICHeader. +func DecodeQUICHeaderAndFrames(p []byte) (*QUICHeader, error) { + if len(p) < 7 { // at least 7 bytes before TokenLength + return nil, errors.New("packet too short") + } + + // make a copy of the packet, so we can use it for crypto later + recdata := make([]byte, len(p)) + copy(recdata, p) + + var qHdr *QUICHeader = &QUICHeader{} + + packetHeaderByteProtected := p[0] + + // check if it's in QUIC long header format: + // - MSB highest bit is 1 (long header format) + // - MSB 2nd highest bit is 1 (always set for QUIC) + if packetHeaderByteProtected&0xc0 != 0xc0 { + return nil, ErrNotQUICLongHeaderFormat + } + + // check if it's a QUIC Initial Packet: MSB lower 2 bits are 0 + if packetHeaderByteProtected&0x30 != 0 { + return nil, ErrNotQUICInitialPacket + } + + // LSB of the first byte is protected, we will resolve it later + + qHdr.Version = p[1:5] + s := cryptobyte.String(p[5:]) + initialRandom := new(cryptobyte.String) + if !s.ReadUint8LengthPrefixed(initialRandom) { + return nil, errors.New("failed to read DCID (initial random)") + } + qHdr.DCIDLength = uint32(len(*initialRandom)) + + var scidLenUint8 uint8 + if !s.ReadUint8(&scidLenUint8) || + !s.Skip(int(scidLenUint8)) { + return nil, errors.New("failed to read SCID") + } + qHdr.SCIDLength = uint32(scidLenUint8) + + // token length is a VLI + r := bytes.NewReader(s) + tokenLen, _, err := ReadNextVLI(r) + if err != nil { + return nil, err + } + // read token bytes + token := make([]byte, tokenLen) + n, err := r.Read(token) + if err != nil { + return nil, err + } + if n != int(tokenLen) { + return nil, errors.New("failed to read all token bytes, short read") + } + if tokenLen > 0 { + qHdr.Token = true + } + + // packet length is a VLI + packetLen, _, err := ReadNextVLI(r) + if err != nil { + return nil, err + } + if packetLen < 20 { + return nil, errors.New("packet length too short, ignore") + } + + // read all remaining bytes as payload + payload := make([]byte, packetLen) + n, err = r.Read(payload) + if err != nil { + return nil, err + } + if n != int(packetLen) { + return nil, errors.New("failed to read all payload bytes, short read") + } + + // do key calculation + clientKey, clientIV, clientHpKey, err := ClientInitialKeysCalc(*initialRandom) + if err != nil { + return nil, err + } + + // compute header protection + hp, err := ComputeHeaderProtection(clientHpKey, payload[4:20]) + if err != nil { + return nil, err + } + + // prepare recdata + // truncate recdata to remove following (possibly) padding bytes + recdata = recdata[:len(recdata)-r.Len()] + // remove payload bytes + recdata = recdata[:len(recdata)-len(payload)] // recdata: [...headers...] [packet number] + + // decipher packet header byte + headerByte := packetHeaderByteProtected ^ (hp[0] & 0x0f) // only lower 4 bits are protected and thus need to be XORed + recdata[0] = headerByte + qHdr.initialPacketNumberLength = uint32(headerByte&0x03) + 1 // LSB lower 2 bits are packet number length (-1) + packetNumberBytes := payload[:qHdr.initialPacketNumberLength] + for i, b := range packetNumberBytes { + unprotectedByte := b ^ hp[i+1] + recdata = append(recdata, unprotectedByte) + qHdr.initialPacketNumber = qHdr.initialPacketNumber<<8 + uint64(unprotectedByte) + qHdr.PacketNumber = append(qHdr.PacketNumber, unprotectedByte) + } + + ciphertext := payload[qHdr.initialPacketNumberLength : len(payload)-16] // payload: [packet number (i-byte)] [encrypted data] [auth tag (16-byte)] + authTag := payload[len(payload)-16:] + + // decipher payload + plaintext, err := DecryptAES128GCM(clientIV, qHdr.initialPacketNumber, clientKey, ciphertext, recdata, authTag) + if err != nil { + return nil, err + } + + // parse frames + qHdr.frames, err = ReadAllFrames(bytes.NewBuffer(plaintext)) + if err != nil { + return nil, err + } + + for _, f := range qHdr.frames { + qHdr.FrameIDs = append(qHdr.FrameIDs, uint8(f.FrameType()&0xff)) + } + + // deduplicate frame IDs + qHdr.FrameIDs = utils.DedupIntArr(qHdr.FrameIDs) + + return qHdr, nil +} + +// Frames returns all recognized frames in the QUIC header. +func (qHdr *QUICHeader) Frames() []Frame { + return qHdr.frames +} + +// NID returns a numeric fingerprint ID for the QUIC header. +func (qHdr *QUICHeader) NID() uint64 { + if qHdr.NumericID != 0 { + return qHdr.NumericID + } + + h := sha1.New() // skipcq: GO-S1025, GSC-G401 + updateArr(h, qHdr.Version) + updateU32(h, qHdr.DCIDLength) + updateU32(h, qHdr.SCIDLength) + updateArr(h, qHdr.PacketNumber) + updateArr(h, qHdr.FrameIDs) + if qHdr.Token { + updateU32(h, TOKEN_PRESENT) + } else { + updateU32(h, TOKEN_ABSENT) + } + + qHdr.NumericID = binary.BigEndian.Uint64(h.Sum(nil)[0:8]) + return qHdr.NumericID +} + +// HID returns a hex fingerprint ID for the QUIC header. +func (qHdr *QUICHeader) HID() string { + nid := qHdr.NID() + hid := make([]byte, 8) + binary.BigEndian.PutUint64(hid, nid) + + qHdr.HexID = hex.EncodeToString(hid) + return qHdr.HexID +} diff --git a/backend/vendor/github.com/gaukas/clienthellod/quic_transport_parameters.go b/backend/vendor/github.com/gaukas/clienthellod/quic_transport_parameters.go new file mode 100644 index 0000000..170405c --- /dev/null +++ b/backend/vendor/github.com/gaukas/clienthellod/quic_transport_parameters.go @@ -0,0 +1,196 @@ +package clienthellod + +import ( + "bytes" + "crypto/sha1" // skipcq: GSC-G505 + "encoding/binary" + "encoding/hex" + "errors" + "fmt" + "sort" + + "github.com/gaukas/clienthellod/internal/utils" + "github.com/gaukas/godicttls" +) + +const ( + QTP_GREASE = 27 + + UNSET_VLI_BITS = true // if false, unsetVLIBits() will be nop +) + +// QUICTransportParameters is a struct to hold the parsed QUIC transport parameters +// as a combination. +type QUICTransportParameters struct { + MaxIdleTimeout utils.Uint8Arr `json:"max_idle_timeout,omitempty"` + MaxUDPPayloadSize utils.Uint8Arr `json:"max_udp_payload_size,omitempty"` + InitialMaxData utils.Uint8Arr `json:"initial_max_data,omitempty"` + InitialMaxStreamDataBidiLocal utils.Uint8Arr `json:"initial_max_stream_data_bidi_local,omitempty"` + InitialMaxStreamDataBidiRemote utils.Uint8Arr `json:"initial_max_stream_data_bidi_remote,omitempty"` + InitialMaxStreamDataUni utils.Uint8Arr `json:"initial_max_stream_data_uni,omitempty"` + InitialMaxStreamsBidi utils.Uint8Arr `json:"initial_max_streams_bidi,omitempty"` + InitialMaxStreamsUni utils.Uint8Arr `json:"initial_max_streams_uni,omitempty"` + AckDelayExponent utils.Uint8Arr `json:"ack_delay_exponent,omitempty"` + MaxAckDelay utils.Uint8Arr `json:"max_ack_delay,omitempty"` + + ActiveConnectionIDLimit utils.Uint8Arr `json:"active_connection_id_limit,omitempty"` + QTPIDs []uint64 `json:"qtpid,omitempty"` // sorted + + HexID string `json:"tpfpid,omitempty"` + NumericID uint64 `json:"tpfnid,omitempty"` + + parseError error +} + +// ParseQUICTransportParameters parses the transport parameters from the extension data of +// TLS Extension "QUIC Transport Parameters" (57) +// +// If any error occurs, the returned struct will have parseError set to the error. +func ParseQUICTransportParameters(extData []byte) *QUICTransportParameters { + qtp := &QUICTransportParameters{ + parseError: errors.New("unknown error"), + } + + r := bytes.NewReader(extData) + var paramType uint64 + var paramValLen uint64 + var paramData []byte + var n int + for r.Len() > 0 { + paramType, _, qtp.parseError = ReadNextVLI(r) + if qtp.parseError != nil { + qtp.parseError = fmt.Errorf("failed to read transport parameter type: %w", qtp.parseError) + return qtp + } + paramValLen, _, qtp.parseError = ReadNextVLI(r) + if qtp.parseError != nil { + qtp.parseError = fmt.Errorf("failed to read transport parameter value length: %w", qtp.parseError) + return qtp + } + + if IsGREASETransportParameter(paramType) { + qtp.QTPIDs = append(qtp.QTPIDs, QTP_GREASE) // replace with placeholder + } else { + qtp.QTPIDs = append(qtp.QTPIDs, paramType) + } + + if paramValLen == 0 { + continue // skip empty transport parameter, no need to try to read + } + + paramData = make([]byte, paramValLen) + n, qtp.parseError = r.Read(paramData) + if qtp.parseError != nil { + qtp.parseError = fmt.Errorf("failed to read transport parameter value: %w", qtp.parseError) + return qtp + } + if uint64(n) != paramValLen { + qtp.parseError = errors.New("corrupted transport parameter") + return qtp + } + + switch paramType { + case godicttls.QUICTransportParameter_max_idle_timeout: + // qtp.MaxIdleTimeoutLength = uint32(paramValLen) + qtp.MaxIdleTimeout = paramData + unsetVLIBits(qtp.MaxIdleTimeout) // toggle the UNSET_VLI_BITS flag to control behavior + case godicttls.QUICTransportParameter_max_udp_payload_size: + // qtp.MaxUDPPayloadSizeLength = uint32(paramValLen) + qtp.MaxUDPPayloadSize = paramData + unsetVLIBits(qtp.MaxUDPPayloadSize) + case godicttls.QUICTransportParameter_initial_max_data: + // qtp.InitialMaxDataLength = uint32(paramValLen) + qtp.InitialMaxData = paramData + unsetVLIBits(qtp.InitialMaxData) + case godicttls.QUICTransportParameter_initial_max_stream_data_bidi_local: + // qtp.InitialMaxStreamDataBidiLocalLength = uint32(paramValLen) + qtp.InitialMaxStreamDataBidiLocal = paramData + unsetVLIBits(qtp.InitialMaxStreamDataBidiLocal) + case godicttls.QUICTransportParameter_initial_max_stream_data_bidi_remote: + // qtp.InitialMaxStreamDataBidiRemoteLength = uint32(paramValLen) + qtp.InitialMaxStreamDataBidiRemote = paramData + unsetVLIBits(qtp.InitialMaxStreamDataBidiRemote) + case godicttls.QUICTransportParameter_initial_max_stream_data_uni: + // qtp.InitialMaxStreamDataUniLength = uint32(paramValLen) + qtp.InitialMaxStreamDataUni = paramData + unsetVLIBits(qtp.InitialMaxStreamDataUni) + case godicttls.QUICTransportParameter_initial_max_streams_bidi: + // qtp.InitialMaxStreamsBidiLength = uint32(paramValLen) + qtp.InitialMaxStreamsBidi = paramData + unsetVLIBits(qtp.InitialMaxStreamsBidi) + case godicttls.QUICTransportParameter_initial_max_streams_uni: + // qtp.InitialMaxStreamsUniLength = uint32(paramValLen) + qtp.InitialMaxStreamsUni = paramData + unsetVLIBits(qtp.InitialMaxStreamsUni) + case godicttls.QUICTransportParameter_ack_delay_exponent: + // qtp.AckDelayExponentLength = uint32(paramValLen) + qtp.AckDelayExponent = paramData + unsetVLIBits(qtp.AckDelayExponent) + case godicttls.QUICTransportParameter_max_ack_delay: + // qtp.MaxAckDelayLength = uint32(paramValLen) + qtp.MaxAckDelay = paramData + unsetVLIBits(qtp.MaxAckDelay) + case godicttls.QUICTransportParameter_active_connection_id_limit: + // qtp.ActiveConnectionIDLimitLength = uint32(paramValLen) + qtp.ActiveConnectionIDLimit = paramData + unsetVLIBits(qtp.ActiveConnectionIDLimit) + } + + // if IsGREASETransportParameter(paramType) { + // qtp.QTPIDs = append(qtp.QTPIDs, QTP_GREASE) // replace with placeholder + // } else { + // qtp.QTPIDs = append(qtp.QTPIDs, paramType) + // } + } + + // sort QTPIDs + sort.Slice(qtp.QTPIDs, func(i, j int) bool { + return qtp.QTPIDs[i] < qtp.QTPIDs[j] + }) + + qtp.parseError = nil + return qtp +} + +// ParseError returns the error that occurred during parsing, if any. +func (qtp *QUICTransportParameters) ParseError() error { + return qtp.parseError +} + +// NID returns the numeric ID of this transport parameters combination. +func (qtp *QUICTransportParameters) NID() uint64 { + if qtp.NumericID != 0 { + return qtp.NumericID + } + + h := sha1.New() // skipcq: GO-S1025, GSC-G401 + updateArr(h, qtp.MaxIdleTimeout) + updateArr(h, qtp.MaxUDPPayloadSize) + updateArr(h, qtp.InitialMaxData) + updateArr(h, qtp.InitialMaxStreamDataBidiLocal) + updateArr(h, qtp.InitialMaxStreamDataBidiRemote) + updateArr(h, qtp.InitialMaxStreamDataUni) + updateArr(h, qtp.InitialMaxStreamsBidi) + updateArr(h, qtp.InitialMaxStreamsUni) + updateArr(h, qtp.AckDelayExponent) + updateArr(h, qtp.MaxAckDelay) + updateArr(h, qtp.ActiveConnectionIDLimit) + + updateU32(h, uint32(len(qtp.QTPIDs))) + for _, id := range qtp.QTPIDs { + updateU64(h, id) + } + + qtp.NumericID = binary.BigEndian.Uint64(h.Sum(nil)) + return qtp.NumericID +} + +// HID returns the hex ID of this transport parameters combination. +func (qtp *QUICTransportParameters) HID() string { + nid := qtp.NID() + hid := make([]byte, 8) + binary.BigEndian.PutUint64(hid, nid) + + qtp.HexID = hex.EncodeToString(hid) + return qtp.HexID +} diff --git a/backend/vendor/github.com/gaukas/godicttls/.gitignore b/backend/vendor/github.com/gaukas/godicttls/.gitignore new file mode 100644 index 0000000..66fd13c --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/.gitignore @@ -0,0 +1,15 @@ +# Binaries for programs and plugins +*.exe +*.exe~ +*.dll +*.so +*.dylib + +# Test binary, built with `go test -c` +*.test + +# Output of the go coverage tool, specifically when used with LiteIDE +*.out + +# Dependency directories (remove the comment below to include it) +# vendor/ diff --git a/backend/vendor/github.com/gaukas/godicttls/LICENSE b/backend/vendor/github.com/gaukas/godicttls/LICENSE new file mode 100644 index 0000000..6b3bea4 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/LICENSE @@ -0,0 +1,28 @@ +BSD 3-Clause License + +Copyright (c) 2023, Gaukas Wang + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + +1. Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. + +2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + +3. Neither the name of the copyright holder nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE +FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, +OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/backend/vendor/github.com/gaukas/godicttls/README.md b/backend/vendor/github.com/gaukas/godicttls/README.md new file mode 100644 index 0000000..81c3772 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/README.md @@ -0,0 +1,6 @@ +# godicttls +Dictionary for TLS written in Go providing bidirectional mapping values to their names, plus enum convenience for values. + +Last Update with data fetched from [IANA](www.iana.org) in March 2023: +- Transport Layer Security (TLS) Parameters [link](https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml) +- Transport Layer Security (TLS) Extensions [link](https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml) \ No newline at end of file diff --git a/backend/vendor/github.com/gaukas/godicttls/alerts.go b/backend/vendor/github.com/gaukas/godicttls/alerts.go new file mode 100644 index 0000000..ef9691c --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/alerts.go @@ -0,0 +1,118 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-6 +// last updated: March 2023 + +const ( + Alert_close_notify uint8 = 0 + Alert_unexpected_message uint8 = 10 + Alert_bad_record_mac uint8 = 20 + Alert_decryption_failed uint8 = 21 + Alert_record_overflow uint8 = 22 + Alert_decompression_failure uint8 = 30 + Alert_handshake_failure uint8 = 40 + Alert_no_certificate uint8 = 41 + Alert_bad_certificate uint8 = 42 + Alert_unsupported_certificate uint8 = 43 + Alert_certificate_revoked uint8 = 44 + Alert_certificate_expired uint8 = 45 + Alert_certificate_unknown uint8 = 46 + Alert_illegal_parameter uint8 = 47 + Alert_unknown_ca uint8 = 48 + Alert_access_denied uint8 = 49 + Alert_decode_error uint8 = 50 + Alert_decrypt_error uint8 = 51 + Alert_too_many_cids_requested uint8 = 52 + Alert_export_restriction uint8 = 60 + Alert_protocol_version uint8 = 70 + Alert_insufficient_security uint8 = 71 + Alert_internal_error uint8 = 80 + Alert_inappropriate_fallback uint8 = 86 + Alert_user_canceled uint8 = 90 + Alert_no_renegotiation uint8 = 100 + Alert_missing_extension uint8 = 109 + Alert_unsupported_extension uint8 = 110 + Alert_certificate_unobtainable uint8 = 111 + Alert_unrecognized_name uint8 = 112 + Alert_bad_certificate_status_response uint8 = 113 + Alert_bad_certificate_hash_value uint8 = 114 + Alert_unknown_psk_identity uint8 = 115 + Alert_certificate_required uint8 = 116 + Alert_no_application_protocol uint8 = 120 +) + +var DictAlertValueIndexed = map[uint8]string{ + 0: "close_notify", + 10: "unexpected_message", + 20: "bad_record_mac", + 21: "decryption_failed", + 22: "record_overflow", + 30: "decompression_failure", + 40: "handshake_failure", + 41: "no_certificate", + 42: "bad_certificate", + 43: "unsupported_certificate", + 44: "certificate_revoked", + 45: "certificate_expired", + 46: "certificate_unknown", + 47: "illegal_parameter", + 48: "unknown_ca", + 49: "access_denied", + 50: "decode_error", + 51: "decrypt_error", + 52: "too_many_cids_requested", + 60: "export_restriction", + 70: "protocol_version", + 71: "insufficient_security", + 80: "internal_error", + 86: "inappropriate_fallback", + 90: "user_canceled", + 100: "no_renegotiation", + 109: "missing_extension", + 110: "unsupported_extension", + 111: "certificate_unobtainable", + 112: "unrecognized_name", + 113: "bad_certificate_status_response", + 114: "bad_certificate_hash_value", + 115: "unknown_psk_identity", + 116: "certificate_required", + 120: "no_application_protocol", +} + +var DictAlertNameIndexed = map[string]uint8{ + "close_notify": 0, + "unexpected_message": 10, + "bad_record_mac": 20, + "decryption_failed": 21, + "record_overflow": 22, + "decompression_failure": 30, + "handshake_failure": 40, + "no_certificate": 41, + "bad_certificate": 42, + "unsupported_certificate": 43, + "certificate_revoked": 44, + "certificate_expired": 45, + "certificate_unknown": 46, + "illegal_parameter": 47, + "unknown_ca": 48, + "access_denied": 49, + "decode_error": 50, + "decrypt_error": 51, + "too_many_cids_requested": 52, + "export_restriction": 60, + "protocol_version": 70, + "insufficient_security": 71, + "internal_error": 80, + "inappropriate_fallback": 86, + "user_canceled": 90, + "no_renegotiation": 100, + "missing_extension": 109, + "unsupported_extension": 110, + "certificate_unobtainable": 111, + "unrecognized_name": 112, + "bad_certificate_status_response": 113, + "bad_certificate_hash_value": 114, + "unknown_psk_identity": 115, + "certificate_required": 116, + "no_application_protocol": 120, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/authorization_data_formats.go b/backend/vendor/github.com/gaukas/godicttls/authorization_data_formats.go new file mode 100644 index 0000000..d8b668f --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/authorization_data_formats.go @@ -0,0 +1,35 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#authorization-data +// last updated: March 2023 + +const ( + AuthData_x509_attr_cert uint16 = 0 + AuthData_saml_assertion uint16 = 1 + AuthData_x509_attr_cert_url uint16 = 2 + AuthData_saml_assertion_url uint16 = 3 + AuthData_keynote_assertion_list uint16 = 64 + AuthData_keynote_assertion_list_url uint16 = 65 + AuthData_dtcp_authorization uint16 = 66 +) + +var DictAuthorizationDataFormatValueIndexed = map[uint16]string{ + 0: "x509_attr_cert", + 1: "saml_assertion", + 2: "x509_attr_cert_url", + 3: "saml_assertion_url", + 64: "keynote_assertion_list", + 65: "keynote_assertion_list_url", + 66: "dtcp_authorization", +} + +var DictAuthorizationDataFormatNameIndexed = map[string]uint16{ + "x509_attr_cert": 0, + "saml_assertion": 1, + "x509_attr_cert_url": 2, + "saml_assertion_url": 3, + "Unassigned": 0, + "keynote_assertion_list": 64, + "keynote_assertion_list_url": 65, + "dtcp_authorization": 66, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/cachedinformationtype_values.go b/backend/vendor/github.com/gaukas/godicttls/cachedinformationtype_values.go new file mode 100644 index 0000000..1973d83 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/cachedinformationtype_values.go @@ -0,0 +1,19 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#cachedinformationtype +// last updated: March 2023 + +const ( + CachedInformationType_cert uint8 = 1 + CachedInformationType_cert_req uint8 = 2 +) + +var DictCachedInformationTypeValueIndexed = map[uint8]string{ + 1: "cert", + 2: "cert_req", +} + +var DictCachedInformationTypeNameIndexed = map[string]uint8{ + "cert": 1, + "cert_req": 2, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/certificate_compression_algorithm_ids.go b/backend/vendor/github.com/gaukas/godicttls/certificate_compression_algorithm_ids.go new file mode 100644 index 0000000..a2c057f --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/certificate_compression_algorithm_ids.go @@ -0,0 +1,22 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#tls-certificate-compression-algorithm-ids +// last updated: March 2023 + +const ( + CertCompAlg_zlib uint16 = 1 + CertCompAlg_brotli uint16 = 2 + CertCompAlg_zstd uint16 = 3 +) + +var DictCertificateCompressionAlgorithmValueIndexed = map[uint16]string{ + 1: "zlib", + 2: "brotli", + 3: "zstd", +} + +var DictCertificateCompressionAlgorithmNameIndexed = map[string]uint16{ + "zlib": 1, + "brotli": 2, + "zstd": 3, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/certificate_status_types.go b/backend/vendor/github.com/gaukas/godicttls/certificate_status_types.go new file mode 100644 index 0000000..37747bf --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/certificate_status_types.go @@ -0,0 +1,19 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#certificate-status +// last updated: March 2023 + +const ( + CertStatusType_ocsp uint8 = 1 + CertStatusType_ocsp_multi uint8 = 2 +) + +var DictCertificateStatusTypeValueIndexed = map[uint8]string{ + 1: "ocsp", + 2: "ocsp_multi", +} + +var DictCertificateStatusTypeNameIndexed = map[string]uint8{ + "ocsp": 1, + "ocsp_multi": 2, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/certificte_types.go b/backend/vendor/github.com/gaukas/godicttls/certificte_types.go new file mode 100644 index 0000000..46ca3ee --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/certificte_types.go @@ -0,0 +1,25 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#tls-extensiontype-values-3 +// last updated: March 2023 + +const ( + CertType_X509 uint8 = 0 + CertType_OpenPGP uint8 = 1 + CertType_Raw_Public_Key uint8 = 2 + CertType_1609Dot2 uint8 = 3 +) + +var DictCertificateTypeValueIndexed = map[uint8]string{ + 0: "X509", + 1: "OpenPGP", + 2: "Raw Public Key", + 3: "1609Dot2", +} + +var DictCertificateTypeNameIndexed = map[string]uint8{ + "X509": 0, + "OpenPGP": 1, + "Raw Public Key": 2, + "1609Dot2": 3, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/cipher_suites.go b/backend/vendor/github.com/gaukas/godicttls/cipher_suites.go new file mode 100644 index 0000000..1b292fe --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/cipher_suites.go @@ -0,0 +1,1084 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-4 +// last updated: March 2023 + +const ( + TLS_NULL_WITH_NULL_NULL uint16 = 0x0000 + TLS_RSA_WITH_NULL_MD5 uint16 = 0x0001 + TLS_RSA_WITH_NULL_SHA uint16 = 0x0002 + TLS_RSA_EXPORT_WITH_RC4_40_MD5 uint16 = 0x0003 + TLS_RSA_WITH_RC4_128_MD5 uint16 = 0x0004 + TLS_RSA_WITH_RC4_128_SHA uint16 = 0x0005 + TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5 uint16 = 0x0006 + TLS_RSA_WITH_IDEA_CBC_SHA uint16 = 0x0007 + TLS_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0008 + TLS_RSA_WITH_DES_CBC_SHA uint16 = 0x0009 + TLS_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x000A + TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x000B + TLS_DH_DSS_WITH_DES_CBC_SHA uint16 = 0x000C + TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0x000D + TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x000E + TLS_DH_RSA_WITH_DES_CBC_SHA uint16 = 0x000F + TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x0010 + TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0011 + TLS_DHE_DSS_WITH_DES_CBC_SHA uint16 = 0x0012 + TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0x0013 + TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0014 + TLS_DHE_RSA_WITH_DES_CBC_SHA uint16 = 0x0015 + TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x0016 + TLS_DH_anon_EXPORT_WITH_RC4_40_MD5 uint16 = 0x0017 + TLS_DH_anon_WITH_RC4_128_MD5 uint16 = 0x0018 + TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0019 + TLS_DH_anon_WITH_DES_CBC_SHA uint16 = 0x001A + TLS_DH_anon_WITH_3DES_EDE_CBC_SHA uint16 = 0x001B + + TLS_KRB5_WITH_DES_CBC_SHA uint16 = 0x001E + TLS_KRB5_WITH_3DES_EDE_CBC_SHA uint16 = 0x001F + TLS_KRB5_WITH_RC4_128_SHA uint16 = 0x0020 + TLS_KRB5_WITH_IDEA_CBC_SHA uint16 = 0x0021 + TLS_KRB5_WITH_DES_CBC_MD5 uint16 = 0x0022 + TLS_KRB5_WITH_3DES_EDE_CBC_MD5 uint16 = 0x0023 + TLS_KRB5_WITH_RC4_128_MD5 uint16 = 0x0024 + TLS_KRB5_WITH_IDEA_CBC_MD5 uint16 = 0x0025 + TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA uint16 = 0x0026 + TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA uint16 = 0x0027 + TLS_KRB5_EXPORT_WITH_RC4_40_SHA uint16 = 0x0028 + TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5 uint16 = 0x0029 + TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5 uint16 = 0x002A + TLS_KRB5_EXPORT_WITH_RC4_40_MD5 uint16 = 0x002B + TLS_PSK_WITH_NULL_SHA uint16 = 0x002C + TLS_DHE_PSK_WITH_NULL_SHA uint16 = 0x002D + TLS_RSA_PSK_WITH_NULL_SHA uint16 = 0x002E + TLS_RSA_WITH_AES_128_CBC_SHA uint16 = 0x002F + TLS_DH_DSS_WITH_AES_128_CBC_SHA uint16 = 0x0030 + TLS_DH_RSA_WITH_AES_128_CBC_SHA uint16 = 0x0031 + TLS_DHE_DSS_WITH_AES_128_CBC_SHA uint16 = 0x0032 + TLS_DHE_RSA_WITH_AES_128_CBC_SHA uint16 = 0x0033 + TLS_DH_anon_WITH_AES_128_CBC_SHA uint16 = 0x0034 + TLS_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0035 + TLS_DH_DSS_WITH_AES_256_CBC_SHA uint16 = 0x0036 + TLS_DH_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0037 + TLS_DHE_DSS_WITH_AES_256_CBC_SHA uint16 = 0x0038 + TLS_DHE_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0039 + TLS_DH_anon_WITH_AES_256_CBC_SHA uint16 = 0x003A + TLS_RSA_WITH_NULL_SHA256 uint16 = 0x003B + TLS_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x003C + TLS_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x003D + TLS_DH_DSS_WITH_AES_128_CBC_SHA256 uint16 = 0x003E + TLS_DH_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x003F + TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 uint16 = 0x0040 + TLS_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0041 + TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0042 + TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0043 + TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0044 + TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0045 + TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0046 + + TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x0067 + TLS_DH_DSS_WITH_AES_256_CBC_SHA256 uint16 = 0x0068 + TLS_DH_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x0069 + TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 uint16 = 0x006A + TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x006B + TLS_DH_anon_WITH_AES_128_CBC_SHA256 uint16 = 0x006C + TLS_DH_anon_WITH_AES_256_CBC_SHA256 uint16 = 0x006D + + TLS_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0084 + TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0085 + TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0086 + TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0087 + TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0088 + TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0089 + TLS_PSK_WITH_RC4_128_SHA uint16 = 0x008A + TLS_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x008B + TLS_PSK_WITH_AES_128_CBC_SHA uint16 = 0x008C + TLS_PSK_WITH_AES_256_CBC_SHA uint16 = 0x008D + TLS_DHE_PSK_WITH_RC4_128_SHA uint16 = 0x008E + TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x008F + TLS_DHE_PSK_WITH_AES_128_CBC_SHA uint16 = 0x0090 + TLS_DHE_PSK_WITH_AES_256_CBC_SHA uint16 = 0x0091 + TLS_RSA_PSK_WITH_RC4_128_SHA uint16 = 0x0092 + TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x0093 + TLS_RSA_PSK_WITH_AES_128_CBC_SHA uint16 = 0x0094 + TLS_RSA_PSK_WITH_AES_256_CBC_SHA uint16 = 0x0095 + TLS_RSA_WITH_SEED_CBC_SHA uint16 = 0x0096 + TLS_DH_DSS_WITH_SEED_CBC_SHA uint16 = 0x0097 + TLS_DH_RSA_WITH_SEED_CBC_SHA uint16 = 0x0098 + TLS_DHE_DSS_WITH_SEED_CBC_SHA uint16 = 0x0099 + TLS_DHE_RSA_WITH_SEED_CBC_SHA uint16 = 0x009A + TLS_DH_anon_WITH_SEED_CBC_SHA uint16 = 0x009B + TLS_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x009C + TLS_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x009D + TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x009E + TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x009F + TLS_DH_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x00A0 + TLS_DH_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x00A1 + TLS_DHE_DSS_WITH_AES_128_GCM_SHA256 uint16 = 0x00A2 + TLS_DHE_DSS_WITH_AES_256_GCM_SHA384 uint16 = 0x00A3 + TLS_DH_DSS_WITH_AES_128_GCM_SHA256 uint16 = 0x00A4 + TLS_DH_DSS_WITH_AES_256_GCM_SHA384 uint16 = 0x00A5 + TLS_DH_anon_WITH_AES_128_GCM_SHA256 uint16 = 0x00A6 + TLS_DH_anon_WITH_AES_256_GCM_SHA384 uint16 = 0x00A7 + TLS_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00A8 + TLS_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00A9 + TLS_DHE_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00AA + TLS_DHE_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00AB + TLS_RSA_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00AC + TLS_RSA_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00AD + TLS_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00AE + TLS_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00AF + TLS_PSK_WITH_NULL_SHA256 uint16 = 0x00B0 + TLS_PSK_WITH_NULL_SHA384 uint16 = 0x00B1 + TLS_DHE_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00B2 + TLS_DHE_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00B3 + TLS_DHE_PSK_WITH_NULL_SHA256 uint16 = 0x00B4 + TLS_DHE_PSK_WITH_NULL_SHA384 uint16 = 0x00B5 + TLS_RSA_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00B6 + TLS_RSA_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00B7 + TLS_RSA_PSK_WITH_NULL_SHA256 uint16 = 0x00B8 + TLS_RSA_PSK_WITH_NULL_SHA384 uint16 = 0x00B9 + TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BA + TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BB + TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BC + TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BD + TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BE + TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BF + TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C0 + TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C1 + TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C2 + TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C3 + TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C4 + TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C5 + TLS_SM4_GCM_SM3 uint16 = 0x00C6 + TLS_SM4_CCM_SM3 uint16 = 0x00C7 + + TLS_EMPTY_RENEGOTIATION_INFO_SCSV uint16 = 0x00FF + + TLS_AES_128_GCM_SHA256 uint16 = 0x1301 + TLS_AES_256_GCM_SHA384 uint16 = 0x1302 + TLS_CHACHA20_POLY1305_SHA256 uint16 = 0x1303 + TLS_AES_128_CCM_SHA256 uint16 = 0x1304 + TLS_AES_128_CCM_8_SHA256 uint16 = 0x1305 + TLS_AEGIS_256_SHA384 uint16 = 0x1306 + TLS_AEGIS_128L_SHA256 uint16 = 0x1307 + + TLS_FALLBACK_SCSV uint16 = 0x5600 + + TLS_ECDH_ECDSA_WITH_NULL_SHA uint16 = 0xC001 + TLS_ECDH_ECDSA_WITH_RC4_128_SHA uint16 = 0xC002 + TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC003 + TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA uint16 = 0xC004 + TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA uint16 = 0xC005 + TLS_ECDHE_ECDSA_WITH_NULL_SHA uint16 = 0xC006 + TLS_ECDHE_ECDSA_WITH_RC4_128_SHA uint16 = 0xC007 + TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC008 + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA uint16 = 0xC009 + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA uint16 = 0xC00A + TLS_ECDH_RSA_WITH_NULL_SHA uint16 = 0xC00B + TLS_ECDH_RSA_WITH_RC4_128_SHA uint16 = 0xC00C + TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC00D + TLS_ECDH_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC00E + TLS_ECDH_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC00F + TLS_ECDHE_RSA_WITH_NULL_SHA uint16 = 0xC010 + TLS_ECDHE_RSA_WITH_RC4_128_SHA uint16 = 0xC011 + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC012 + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC013 + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC014 + TLS_ECDH_anon_WITH_NULL_SHA uint16 = 0xC015 + TLS_ECDH_anon_WITH_RC4_128_SHA uint16 = 0xC016 + TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA uint16 = 0xC017 + TLS_ECDH_anon_WITH_AES_128_CBC_SHA uint16 = 0xC018 + TLS_ECDH_anon_WITH_AES_256_CBC_SHA uint16 = 0xC019 + TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01A + TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01B + TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01C + TLS_SRP_SHA_WITH_AES_128_CBC_SHA uint16 = 0xC01D + TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC01E + TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA uint16 = 0xC01F + TLS_SRP_SHA_WITH_AES_256_CBC_SHA uint16 = 0xC020 + TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC021 + TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA uint16 = 0xC022 + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC023 + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC024 + TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC025 + TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC026 + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC027 + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC028 + TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC029 + TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC02A + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02B + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC02C + TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02D + TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC02E + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02F + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC030 + TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC031 + TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC032 + TLS_ECDHE_PSK_WITH_RC4_128_SHA uint16 = 0xC033 + TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0xC034 + TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA uint16 = 0xC035 + TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA uint16 = 0xC036 + TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0xC037 + TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0xC038 + TLS_ECDHE_PSK_WITH_NULL_SHA uint16 = 0xC039 + TLS_ECDHE_PSK_WITH_NULL_SHA256 uint16 = 0xC03A + TLS_ECDHE_PSK_WITH_NULL_SHA384 uint16 = 0xC03B + TLS_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC03C + TLS_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC03D + TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC03E + TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC03F + TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC040 + TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC041 + TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC042 + TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC043 + TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC044 + TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC045 + TLS_DH_anon_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC046 + TLS_DH_anon_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC047 + TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC048 + TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC049 + TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04A + TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04B + TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04C + TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04D + TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04E + TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04F + TLS_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC050 + TLS_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC051 + TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC052 + TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC053 + TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC054 + TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC055 + TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC056 + TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC057 + TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC058 + TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC059 + TLS_DH_anon_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05A + TLS_DH_anon_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05B + TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05C + TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05D + TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05E + TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05F + TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC060 + TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC061 + TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC062 + TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC063 + TLS_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC064 + TLS_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC065 + TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC066 + TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC067 + TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC068 + TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC069 + TLS_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06A + TLS_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06B + TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06C + TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06D + TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06E + TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06F + TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC070 + TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC071 + TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC072 + TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC073 + TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC074 + TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC075 + TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC076 + TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC077 + TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC078 + TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC079 + TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07A + TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07B + TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07C + TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07D + TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07E + TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07F + TLS_DHE_DSS_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC080 + TLS_DHE_DSS_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC081 + TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC082 + TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC083 + TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC084 + TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC085 + TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC086 + TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC087 + TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC088 + TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC089 + TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08A + TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08B + TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08C + TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08D + TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08E + TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08F + TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC090 + TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC091 + TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC092 + TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC093 + TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC094 + TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC095 + TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC096 + TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC097 + TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC098 + TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC099 + TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC09A + TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC09B + TLS_RSA_WITH_AES_128_CCM uint16 = 0xC09C + TLS_RSA_WITH_AES_256_CCM uint16 = 0xC09D + TLS_DHE_RSA_WITH_AES_128_CCM uint16 = 0xC09E + TLS_DHE_RSA_WITH_AES_256_CCM uint16 = 0xC09F + TLS_RSA_WITH_AES_128_CCM_8 uint16 = 0xC0A0 + TLS_RSA_WITH_AES_256_CCM_8 uint16 = 0xC0A1 + TLS_DHE_RSA_WITH_AES_128_CCM_8 uint16 = 0xC0A2 + TLS_DHE_RSA_WITH_AES_256_CCM_8 uint16 = 0xC0A3 + TLS_PSK_WITH_AES_128_CCM uint16 = 0xC0A4 + TLS_PSK_WITH_AES_256_CCM uint16 = 0xC0A5 + TLS_DHE_PSK_WITH_AES_128_CCM uint16 = 0xC0A6 + TLS_DHE_PSK_WITH_AES_256_CCM uint16 = 0xC0A7 + TLS_PSK_WITH_AES_128_CCM_8 uint16 = 0xC0A8 + TLS_PSK_WITH_AES_256_CCM_8 uint16 = 0xC0A9 + TLS_PSK_DHE_WITH_AES_128_CCM_8 uint16 = 0xC0AA + TLS_PSK_DHE_WITH_AES_256_CCM_8 uint16 = 0xC0AB + TLS_ECDHE_ECDSA_WITH_AES_128_CCM uint16 = 0xC0AC + TLS_ECDHE_ECDSA_WITH_AES_256_CCM uint16 = 0xC0AD + TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8 uint16 = 0xC0AE + TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8 uint16 = 0xC0AF + TLS_ECCPWD_WITH_AES_128_GCM_SHA256 uint16 = 0xC0B0 + TLS_ECCPWD_WITH_AES_256_GCM_SHA384 uint16 = 0xC0B1 + TLS_ECCPWD_WITH_AES_128_CCM_SHA256 uint16 = 0xC0B2 + TLS_ECCPWD_WITH_AES_256_CCM_SHA384 uint16 = 0xC0B3 + TLS_SHA256_SHA256 uint16 = 0xC0B4 + TLS_SHA384_SHA384 uint16 = 0xC0B5 + + TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC uint16 = 0xC100 + TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC uint16 = 0xC101 + TLS_GOSTR341112_256_WITH_28147_CNT_IMIT uint16 = 0xC102 + TLS_GOSTR341112_256_WITH_KUZNYECHIK_MGM_L uint16 = 0xC103 +) + +var DictCipherSuiteValueIndexed = map[uint16]string{ + 0x0000: "TLS_NULL_WITH_NULL_NULL", + 0x0001: "TLS_RSA_WITH_NULL_MD5", + 0x0002: "TLS_RSA_WITH_NULL_SHA", + 0x0003: "TLS_RSA_EXPORT_WITH_RC4_40_MD5", + 0x0004: "TLS_RSA_WITH_RC4_128_MD5", + 0x0005: "TLS_RSA_WITH_RC4_128_SHA", + 0x0006: "TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5", + 0x0007: "TLS_RSA_WITH_IDEA_CBC_SHA", + 0x0008: "TLS_RSA_EXPORT_WITH_DES40_CBC_SHA", + 0x0009: "TLS_RSA_WITH_DES_CBC_SHA", + 0x000A: "TLS_RSA_WITH_3DES_EDE_CBC_SHA", + 0x000B: "TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA", + 0x000C: "TLS_DH_DSS_WITH_DES_CBC_SHA", + 0x000D: "TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA", + 0x000E: "TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA", + 0x000F: "TLS_DH_RSA_WITH_DES_CBC_SHA", + 0x0010: "TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA", + 0x0011: "TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA", + 0x0012: "TLS_DHE_DSS_WITH_DES_CBC_SHA", + 0x0013: "TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA", + 0x0014: "TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA", + 0x0015: "TLS_DHE_RSA_WITH_DES_CBC_SHA", + 0x0016: "TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA", + 0x0017: "TLS_DH_anon_EXPORT_WITH_RC4_40_MD5", + 0x0018: "TLS_DH_anon_WITH_RC4_128_MD5", + 0x0019: "TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA", + 0x001A: "TLS_DH_anon_WITH_DES_CBC_SHA", + 0x001B: "TLS_DH_anon_WITH_3DES_EDE_CBC_SHA", + + 0x001E: "TLS_KRB5_WITH_DES_CBC_SHA", + 0x001F: "TLS_KRB5_WITH_3DES_EDE_CBC_SHA", + 0x0020: "TLS_KRB5_WITH_RC4_128_SHA", + 0x0021: "TLS_KRB5_WITH_IDEA_CBC_SHA", + 0x0022: "TLS_KRB5_WITH_DES_CBC_MD5", + 0x0023: "TLS_KRB5_WITH_3DES_EDE_CBC_MD5", + 0x0024: "TLS_KRB5_WITH_RC4_128_MD5", + 0x0025: "TLS_KRB5_WITH_IDEA_CBC_MD5", + 0x0026: "TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA", + 0x0027: "TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA", + 0x0028: "TLS_KRB5_EXPORT_WITH_RC4_40_SHA", + 0x0029: "TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5", + 0x002A: "TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5", + 0x002B: "TLS_KRB5_EXPORT_WITH_RC4_40_MD5", + 0x002C: "TLS_PSK_WITH_NULL_SHA", + 0x002D: "TLS_DHE_PSK_WITH_NULL_SHA", + 0x002E: "TLS_RSA_PSK_WITH_NULL_SHA", + 0x002F: "TLS_RSA_WITH_AES_128_CBC_SHA", + 0x0030: "TLS_DH_DSS_WITH_AES_128_CBC_SHA", + 0x0031: "TLS_DH_RSA_WITH_AES_128_CBC_SHA", + 0x0032: "TLS_DHE_DSS_WITH_AES_128_CBC_SHA", + 0x0033: "TLS_DHE_RSA_WITH_AES_128_CBC_SHA", + 0x0034: "TLS_DH_anon_WITH_AES_128_CBC_SHA", + 0x0035: "TLS_RSA_WITH_AES_256_CBC_SHA", + 0x0036: "TLS_DH_DSS_WITH_AES_256_CBC_SHA", + 0x0037: "TLS_DH_RSA_WITH_AES_256_CBC_SHA", + 0x0038: "TLS_DHE_DSS_WITH_AES_256_CBC_SHA", + 0x0039: "TLS_DHE_RSA_WITH_AES_256_CBC_SHA", + 0x003A: "TLS_DH_anon_WITH_AES_256_CBC_SHA", + 0x003B: "TLS_RSA_WITH_NULL_SHA256", + 0x003C: "TLS_RSA_WITH_AES_128_CBC_SHA256", + 0x003D: "TLS_RSA_WITH_AES_256_CBC_SHA256", + 0x003E: "TLS_DH_DSS_WITH_AES_128_CBC_SHA256", + 0x003F: "TLS_DH_RSA_WITH_AES_128_CBC_SHA256", + 0x0040: "TLS_DHE_DSS_WITH_AES_128_CBC_SHA256", + 0x0041: "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA", + 0x0042: "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA", + 0x0043: "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA", + 0x0044: "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA", + 0x0045: "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA", + 0x0046: "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA", + + 0x0067: "TLS_DHE_RSA_WITH_AES_128_CBC_SHA256", + 0x0068: "TLS_DH_DSS_WITH_AES_256_CBC_SHA256", + 0x0069: "TLS_DH_RSA_WITH_AES_256_CBC_SHA256", + 0x006A: "TLS_DHE_DSS_WITH_AES_256_CBC_SHA256", + 0x006B: "TLS_DHE_RSA_WITH_AES_256_CBC_SHA256", + 0x006C: "TLS_DH_anon_WITH_AES_128_CBC_SHA256", + 0x006D: "TLS_DH_anon_WITH_AES_256_CBC_SHA256", + + 0x0084: "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA", + 0x0085: "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA", + 0x0086: "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA", + 0x0087: "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA", + 0x0088: "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA", + 0x0089: "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA", + 0x008A: "TLS_PSK_WITH_RC4_128_SHA", + 0x008B: "TLS_PSK_WITH_3DES_EDE_CBC_SHA", + 0x008C: "TLS_PSK_WITH_AES_128_CBC_SHA", + 0x008D: "TLS_PSK_WITH_AES_256_CBC_SHA", + 0x008E: "TLS_DHE_PSK_WITH_RC4_128_SHA", + 0x008F: "TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA", + 0x0090: "TLS_DHE_PSK_WITH_AES_128_CBC_SHA", + 0x0091: "TLS_DHE_PSK_WITH_AES_256_CBC_SHA", + 0x0092: "TLS_RSA_PSK_WITH_RC4_128_SHA", + 0x0093: "TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA", + 0x0094: "TLS_RSA_PSK_WITH_AES_128_CBC_SHA", + 0x0095: "TLS_RSA_PSK_WITH_AES_256_CBC_SHA", + 0x0096: "TLS_RSA_WITH_SEED_CBC_SHA", + 0x0097: "TLS_DH_DSS_WITH_SEED_CBC_SHA", + 0x0098: "TLS_DH_RSA_WITH_SEED_CBC_SHA", + 0x0099: "TLS_DHE_DSS_WITH_SEED_CBC_SHA", + 0x009A: "TLS_DHE_RSA_WITH_SEED_CBC_SHA", + 0x009B: "TLS_DH_anon_WITH_SEED_CBC_SHA", + 0x009C: "TLS_RSA_WITH_AES_128_GCM_SHA256", + 0x009D: "TLS_RSA_WITH_AES_256_GCM_SHA384", + 0x009E: "TLS_DHE_RSA_WITH_AES_128_GCM_SHA256", + 0x009F: "TLS_DHE_RSA_WITH_AES_256_GCM_SHA384", + 0x00A0: "TLS_DH_RSA_WITH_AES_128_GCM_SHA256", + 0x00A1: "TLS_DH_RSA_WITH_AES_256_GCM_SHA384", + 0x00A2: "TLS_DHE_DSS_WITH_AES_128_GCM_SHA256", + 0x00A3: "TLS_DHE_DSS_WITH_AES_256_GCM_SHA384", + 0x00A4: "TLS_DH_DSS_WITH_AES_128_GCM_SHA256", + 0x00A5: "TLS_DH_DSS_WITH_AES_256_GCM_SHA384", + 0x00A6: "TLS_DH_anon_WITH_AES_128_GCM_SHA256", + 0x00A7: "TLS_DH_anon_WITH_AES_256_GCM_SHA384", + 0x00A8: "TLS_PSK_WITH_AES_128_GCM_SHA256", + 0x00A9: "TLS_PSK_WITH_AES_256_GCM_SHA384", + 0x00AA: "TLS_DHE_PSK_WITH_AES_128_GCM_SHA256", + 0x00AB: "TLS_DHE_PSK_WITH_AES_256_GCM_SHA384", + 0x00AC: "TLS_RSA_PSK_WITH_AES_128_GCM_SHA256", + 0x00AD: "TLS_RSA_PSK_WITH_AES_256_GCM_SHA384", + 0x00AE: "TLS_PSK_WITH_AES_128_CBC_SHA256", + 0x00AF: "TLS_PSK_WITH_AES_256_CBC_SHA384", + 0x00B0: "TLS_PSK_WITH_NULL_SHA256", + 0x00B1: "TLS_PSK_WITH_NULL_SHA384", + 0x00B2: "TLS_DHE_PSK_WITH_AES_128_CBC_SHA256", + 0x00B3: "TLS_DHE_PSK_WITH_AES_256_CBC_SHA384", + 0x00B4: "TLS_DHE_PSK_WITH_NULL_SHA256", + 0x00B5: "TLS_DHE_PSK_WITH_NULL_SHA384", + 0x00B6: "TLS_RSA_PSK_WITH_AES_128_CBC_SHA256", + 0x00B7: "TLS_RSA_PSK_WITH_AES_256_CBC_SHA384", + 0x00B8: "TLS_RSA_PSK_WITH_NULL_SHA256", + 0x00B9: "TLS_RSA_PSK_WITH_NULL_SHA384", + 0x00BA: "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256", + 0x00BB: "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256", + 0x00BC: "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256", + 0x00BD: "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256", + 0x00BE: "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256", + 0x00BF: "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256", + 0x00C0: "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C1: "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C2: "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C3: "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C4: "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C5: "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C6: "TLS_SM4_GCM_SM3", + 0x00C7: "TLS_SM4_CCM_SM3", + + 0x00FF: "TLS_EMPTY_RENEGOTIATION_INFO_SCSV", + + 0x1301: "TLS_AES_128_GCM_SHA256", + 0x1302: "TLS_AES_256_GCM_SHA384", + 0x1303: "TLS_CHACHA20_POLY1305_SHA256", + 0x1304: "TLS_AES_128_CCM_SHA256", + 0x1305: "TLS_AES_128_CCM_8_SHA256", + 0x1306: "TLS_AEGIS_256_SHA384", + 0x1307: "TLS_AEGIS_128L_SHA256", + + 0x5600: "TLS_FALLBACK_SCSV", + + 0xC001: "TLS_ECDH_ECDSA_WITH_NULL_SHA", + 0xC002: "TLS_ECDH_ECDSA_WITH_RC4_128_SHA", + 0xC003: "TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA", + 0xC004: "TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA", + 0xC005: "TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA", + 0xC006: "TLS_ECDHE_ECDSA_WITH_NULL_SHA", + 0xC007: "TLS_ECDHE_ECDSA_WITH_RC4_128_SHA", + 0xC008: "TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA", + 0xC009: "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA", + 0xC00A: "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA", + 0xC00B: "TLS_ECDH_RSA_WITH_NULL_SHA", + 0xC00C: "TLS_ECDH_RSA_WITH_RC4_128_SHA", + 0xC00D: "TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA", + 0xC00E: "TLS_ECDH_RSA_WITH_AES_128_CBC_SHA", + 0xC00F: "TLS_ECDH_RSA_WITH_AES_256_CBC_SHA", + 0xC010: "TLS_ECDHE_RSA_WITH_NULL_SHA", + 0xC011: "TLS_ECDHE_RSA_WITH_RC4_128_SHA", + 0xC012: "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA", + 0xC013: "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA", + 0xC014: "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA", + 0xC015: "TLS_ECDH_anon_WITH_NULL_SHA", + 0xC016: "TLS_ECDH_anon_WITH_RC4_128_SHA", + 0xC017: "TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA", + 0xC018: "TLS_ECDH_anon_WITH_AES_128_CBC_SHA", + 0xC019: "TLS_ECDH_anon_WITH_AES_256_CBC_SHA", + 0xC01A: "TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA", + 0xC01B: "TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA", + 0xC01C: "TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA", + 0xC01D: "TLS_SRP_SHA_WITH_AES_128_CBC_SHA", + 0xC01E: "TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA", + 0xC01F: "TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA", + 0xC020: "TLS_SRP_SHA_WITH_AES_256_CBC_SHA", + 0xC021: "TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA", + 0xC022: "TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA", + 0xC023: "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256", + 0xC024: "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384", + 0xC025: "TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256", + 0xC026: "TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384", + 0xC027: "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256", + 0xC028: "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384", + 0xC029: "TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256", + 0xC02A: "TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384", + 0xC02B: "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256", + 0xC02C: "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384", + 0xC02D: "TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256", + 0xC02E: "TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384", + 0xC02F: "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256", + 0xC030: "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384", + 0xC031: "TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256", + 0xC032: "TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384", + 0xC033: "TLS_ECDHE_PSK_WITH_RC4_128_SHA", + 0xC034: "TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA", + 0xC035: "TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA", + 0xC036: "TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA", + 0xC037: "TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256", + 0xC038: "TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384", + 0xC039: "TLS_ECDHE_PSK_WITH_NULL_SHA", + 0xC03A: "TLS_ECDHE_PSK_WITH_NULL_SHA256", + 0xC03B: "TLS_ECDHE_PSK_WITH_NULL_SHA384", + 0xC03C: "TLS_RSA_WITH_ARIA_128_CBC_SHA256", + 0xC03D: "TLS_RSA_WITH_ARIA_256_CBC_SHA384", + 0xC03E: "TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256", + 0xC03F: "TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384", + 0xC040: "TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256", + 0xC041: "TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384", + 0xC042: "TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256", + 0xC043: "TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384", + 0xC044: "TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256", + 0xC045: "TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384", + 0xC046: "TLS_DH_anon_WITH_ARIA_128_CBC_SHA256", + 0xC047: "TLS_DH_anon_WITH_ARIA_256_CBC_SHA384", + 0xC048: "TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256", + 0xC049: "TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384", + 0xC04A: "TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256", + 0xC04B: "TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384", + 0xC04C: "TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256", + 0xC04D: "TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384", + 0xC04E: "TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256", + 0xC04F: "TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384", + 0xC050: "TLS_RSA_WITH_ARIA_128_GCM_SHA256", + 0xC051: "TLS_RSA_WITH_ARIA_256_GCM_SHA384", + 0xC052: "TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256", + 0xC053: "TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384", + 0xC054: "TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256", + 0xC055: "TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384", + 0xC056: "TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256", + 0xC057: "TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384", + 0xC058: "TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256", + 0xC059: "TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384", + 0xC05A: "TLS_DH_anon_WITH_ARIA_128_GCM_SHA256", + 0xC05B: "TLS_DH_anon_WITH_ARIA_256_GCM_SHA384", + 0xC05C: "TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256", + 0xC05D: "TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384", + 0xC05E: "TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256", + 0xC05F: "TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384", + 0xC060: "TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256", + 0xC061: "TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384", + 0xC062: "TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256", + 0xC063: "TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384", + 0xC064: "TLS_PSK_WITH_ARIA_128_CBC_SHA256", + 0xC065: "TLS_PSK_WITH_ARIA_256_CBC_SHA384", + 0xC066: "TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256", + 0xC067: "TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384", + 0xC068: "TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256", + 0xC069: "TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384", + 0xC06A: "TLS_PSK_WITH_ARIA_128_GCM_SHA256", + 0xC06B: "TLS_PSK_WITH_ARIA_256_GCM_SHA384", + 0xC06C: "TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256", + 0xC06D: "TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384", + 0xC06E: "TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256", + 0xC06F: "TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384", + 0xC070: "TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256", + 0xC071: "TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384", + 0xC072: "TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256", + 0xC073: "TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384", + 0xC074: "TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256", + 0xC075: "TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384", + 0xC076: "TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256", + 0xC077: "TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384", + 0xC078: "TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256", + 0xC079: "TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384", + 0xC07A: "TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC07B: "TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC07C: "TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC07D: "TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC07E: "TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC07F: "TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC080: "TLS_DHE_DSS_WITH_CAMELLIA_128_GCM_SHA256", + 0xC081: "TLS_DHE_DSS_WITH_CAMELLIA_256_GCM_SHA384", + 0xC082: "TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256", + 0xC083: "TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384", + 0xC084: "TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256", + 0xC085: "TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384", + 0xC086: "TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC087: "TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC088: "TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC089: "TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC08A: "TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC08B: "TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC08C: "TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC08D: "TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC08E: "TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256", + 0xC08F: "TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384", + 0xC090: "TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256", + 0xC091: "TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384", + 0xC092: "TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256", + 0xC093: "TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384", + 0xC094: "TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256", + 0xC095: "TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384", + 0xC096: "TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256", + 0xC097: "TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384", + 0xC098: "TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256", + 0xC099: "TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384", + 0xC09A: "TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256", + 0xC09B: "TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384", + 0xC09C: "TLS_RSA_WITH_AES_128_CCM", + 0xC09D: "TLS_RSA_WITH_AES_256_CCM", + 0xC09E: "TLS_DHE_RSA_WITH_AES_128_CCM", + 0xC09F: "TLS_DHE_RSA_WITH_AES_256_CCM", + 0xC0A0: "TLS_RSA_WITH_AES_128_CCM_8", + 0xC0A1: "TLS_RSA_WITH_AES_256_CCM_8", + 0xC0A2: "TLS_DHE_RSA_WITH_AES_128_CCM_8", + 0xC0A3: "TLS_DHE_RSA_WITH_AES_256_CCM_8", + 0xC0A4: "TLS_PSK_WITH_AES_128_CCM", + 0xC0A5: "TLS_PSK_WITH_AES_256_CCM", + 0xC0A6: "TLS_DHE_PSK_WITH_AES_128_CCM", + 0xC0A7: "TLS_DHE_PSK_WITH_AES_256_CCM", + 0xC0A8: "TLS_PSK_WITH_AES_128_CCM_8", + 0xC0A9: "TLS_PSK_WITH_AES_256_CCM_8", + 0xC0AA: "TLS_PSK_DHE_WITH_AES_128_CCM_8", + 0xC0AB: "TLS_PSK_DHE_WITH_AES_256_CCM_8", + 0xC0AC: "TLS_ECDHE_ECDSA_WITH_AES_128_CCM", + 0xC0AD: "TLS_ECDHE_ECDSA_WITH_AES_256_CCM", + 0xC0AE: "TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8", + 0xC0AF: "TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8", + 0xC0B0: "TLS_ECCPWD_WITH_AES_128_GCM_SHA256", + 0xC0B1: "TLS_ECCPWD_WITH_AES_256_GCM_SHA384", + 0xC0B2: "TLS_ECCPWD_WITH_AES_128_CCM_SHA256", + 0xC0B3: "TLS_ECCPWD_WITH_AES_256_CCM_SHA384", + 0xC0B4: "TLS_SHA256_SHA256", + 0xC0B5: "TLS_SHA384_SHA384", + + 0xC100: "TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC", + 0xC101: "TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC", + 0xC102: "TLS_GOSTR341112_256_WITH_28147_CNT_IMIT", + 0xC103: "TLS_GOSTR341112_256_WITH_KUZNYECHIK_MGM_L", + 0xC104: "TLS_GOSTR341112_256_WITH_MAGMA_MGM_L", + 0xC105: "TLS_GOSTR341112_256_WITH_KUZNYECHIK_MGM_S", + 0xC106: "TLS_GOSTR341112_256_WITH_MAGMA_MGM_S", + + 0xCCA8: "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256", + 0xCCA9: "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256", + 0xCCAA: "TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256", + 0xCCAB: "TLS_PSK_WITH_CHACHA20_POLY1305_SHA256", + 0xCCAC: "TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256", + 0xCCAD: "TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256", + 0xCCAE: "TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256", + + 0xD001: "TLS_ECDHE_PSK_WITH_AES_128_GCM_SHA256", + 0xD002: "TLS_ECDHE_PSK_WITH_AES_256_GCM_SHA384", + 0xD003: "TLS_ECDHE_PSK_WITH_AES_128_CCM_8_SHA256", + 0xD005: "TLS_ECDHE_PSK_WITH_AES_128_CCM_SHA256", +} + +var DictCipherSuiteNameIndexed = map[string]uint16{ + "TLS_NULL_WITH_NULL_NULL": 0x0000, + "TLS_RSA_WITH_NULL_MD5": 0x0001, + "TLS_RSA_WITH_NULL_SHA": 0x0002, + "TLS_RSA_EXPORT_WITH_RC4_40_MD5": 0x0003, + "TLS_RSA_WITH_RC4_128_MD5": 0x0004, + "TLS_RSA_WITH_RC4_128_SHA": 0x0005, + "TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5": 0x0006, + "TLS_RSA_WITH_IDEA_CBC_SHA": 0x0007, + "TLS_RSA_EXPORT_WITH_DES40_CBC_SHA": 0x0008, + "TLS_RSA_WITH_DES_CBC_SHA": 0x0009, + "TLS_RSA_WITH_3DES_EDE_CBC_SHA": 0x000A, + "TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA": 0x000B, + "TLS_DH_DSS_WITH_DES_CBC_SHA": 0x000C, + "TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA": 0x000D, + "TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA": 0x000E, + "TLS_DH_RSA_WITH_DES_CBC_SHA": 0x000F, + "TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA": 0x0010, + "TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA": 0x0011, + "TLS_DHE_DSS_WITH_DES_CBC_SHA": 0x0012, + "TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA": 0x0013, + "TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA": 0x0014, + "TLS_DHE_RSA_WITH_DES_CBC_SHA": 0x0015, + "TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA": 0x0016, + "TLS_DH_anon_EXPORT_WITH_RC4_40_MD5": 0x0017, + "TLS_DH_anon_WITH_RC4_128_MD5": 0x0018, + "TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA": 0x0019, + "TLS_DH_anon_WITH_DES_CBC_SHA": 0x001A, + "TLS_DH_anon_WITH_3DES_EDE_CBC_SHA": 0x001B, + + "TLS_KRB5_WITH_DES_CBC_SHA": 0x001E, + "TLS_KRB5_WITH_3DES_EDE_CBC_SHA": 0x001F, + "TLS_KRB5_WITH_RC4_128_SHA": 0x0020, + "TLS_KRB5_WITH_IDEA_CBC_SHA": 0x0021, + "TLS_KRB5_WITH_DES_CBC_MD5": 0x0022, + "TLS_KRB5_WITH_3DES_EDE_CBC_MD5": 0x0023, + "TLS_KRB5_WITH_RC4_128_MD5": 0x0024, + "TLS_KRB5_WITH_IDEA_CBC_MD5": 0x0025, + "TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA": 0x0026, + "TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA": 0x0027, + "TLS_KRB5_EXPORT_WITH_RC4_40_SHA": 0x0028, + "TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5": 0x0029, + "TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5": 0x002A, + "TLS_KRB5_EXPORT_WITH_RC4_40_MD5": 0x002B, + "TLS_PSK_WITH_NULL_SHA": 0x002C, + "TLS_DHE_PSK_WITH_NULL_SHA": 0x002D, + "TLS_RSA_PSK_WITH_NULL_SHA": 0x002E, + "TLS_RSA_WITH_AES_128_CBC_SHA": 0x002F, + "TLS_DH_DSS_WITH_AES_128_CBC_SHA": 0x0030, + "TLS_DH_RSA_WITH_AES_128_CBC_SHA": 0x0031, + "TLS_DHE_DSS_WITH_AES_128_CBC_SHA": 0x0032, + "TLS_DHE_RSA_WITH_AES_128_CBC_SHA": 0x0033, + "TLS_DH_anon_WITH_AES_128_CBC_SHA": 0x0034, + "TLS_RSA_WITH_AES_256_CBC_SHA": 0x0035, + "TLS_DH_DSS_WITH_AES_256_CBC_SHA": 0x0036, + "TLS_DH_RSA_WITH_AES_256_CBC_SHA": 0x0037, + "TLS_DHE_DSS_WITH_AES_256_CBC_SHA": 0x0038, + "TLS_DHE_RSA_WITH_AES_256_CBC_SHA": 0x0039, + "TLS_DH_anon_WITH_AES_256_CBC_SHA": 0x003A, + "TLS_RSA_WITH_NULL_SHA256": 0x003B, + "TLS_RSA_WITH_AES_128_CBC_SHA256": 0x003C, + "TLS_RSA_WITH_AES_256_CBC_SHA256": 0x003D, + "TLS_DH_DSS_WITH_AES_128_CBC_SHA256": 0x003E, + "TLS_DH_RSA_WITH_AES_128_CBC_SHA256": 0x003F, + "TLS_DHE_DSS_WITH_AES_128_CBC_SHA256": 0x0040, + "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA": 0x0041, + "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA": 0x0042, + "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA": 0x0043, + "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA": 0x0044, + "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA": 0x0045, + "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA": 0x0046, + + "TLS_DHE_RSA_WITH_AES_128_CBC_SHA256": 0x0067, + "TLS_DH_DSS_WITH_AES_256_CBC_SHA256": 0x0068, + "TLS_DH_RSA_WITH_AES_256_CBC_SHA256": 0x0069, + "TLS_DHE_DSS_WITH_AES_256_CBC_SHA256": 0x006A, + "TLS_DHE_RSA_WITH_AES_256_CBC_SHA256": 0x006B, + "TLS_DH_anon_WITH_AES_128_CBC_SHA256": 0x006C, + "TLS_DH_anon_WITH_AES_256_CBC_SHA256": 0x006D, + + "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA": 0x0084, + "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA": 0x0085, + "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA": 0x0086, + "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA": 0x0087, + "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA": 0x0088, + "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA": 0x0089, + "TLS_PSK_WITH_RC4_128_SHA": 0x008A, + "TLS_PSK_WITH_3DES_EDE_CBC_SHA": 0x008B, + "TLS_PSK_WITH_AES_128_CBC_SHA": 0x008C, + "TLS_PSK_WITH_AES_256_CBC_SHA": 0x008D, + "TLS_DHE_PSK_WITH_RC4_128_SHA": 0x008E, + "TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA": 0x008F, + "TLS_DHE_PSK_WITH_AES_128_CBC_SHA": 0x0090, + "TLS_DHE_PSK_WITH_AES_256_CBC_SHA": 0x0091, + "TLS_RSA_PSK_WITH_RC4_128_SHA": 0x0092, + "TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA": 0x0093, + "TLS_RSA_PSK_WITH_AES_128_CBC_SHA": 0x0094, + "TLS_RSA_PSK_WITH_AES_256_CBC_SHA": 0x0095, + "TLS_RSA_WITH_SEED_CBC_SHA": 0x0096, + "TLS_DH_DSS_WITH_SEED_CBC_SHA": 0x0097, + "TLS_DH_RSA_WITH_SEED_CBC_SHA": 0x0098, + "TLS_DHE_DSS_WITH_SEED_CBC_SHA": 0x0099, + "TLS_DHE_RSA_WITH_SEED_CBC_SHA": 0x009A, + "TLS_DH_anon_WITH_SEED_CBC_SHA": 0x009B, + "TLS_RSA_WITH_AES_128_GCM_SHA256": 0x009C, + "TLS_RSA_WITH_AES_256_GCM_SHA384": 0x009D, + "TLS_DHE_RSA_WITH_AES_128_GCM_SHA256": 0x009E, + "TLS_DHE_RSA_WITH_AES_256_GCM_SHA384": 0x009F, + "TLS_DH_RSA_WITH_AES_128_GCM_SHA256": 0x00A0, + "TLS_DH_RSA_WITH_AES_256_GCM_SHA384": 0x00A1, + "TLS_DHE_DSS_WITH_AES_128_GCM_SHA256": 0x00A2, + "TLS_DHE_DSS_WITH_AES_256_GCM_SHA384": 0x00A3, + "TLS_DH_DSS_WITH_AES_128_GCM_SHA256": 0x00A4, + "TLS_DH_DSS_WITH_AES_256_GCM_SHA384": 0x00A5, + "TLS_DH_anon_WITH_AES_128_GCM_SHA256": 0x00A6, + "TLS_DH_anon_WITH_AES_256_GCM_SHA384": 0x00A7, + "TLS_PSK_WITH_AES_128_GCM_SHA256": 0x00A8, + "TLS_PSK_WITH_AES_256_GCM_SHA384": 0x00A9, + "TLS_DHE_PSK_WITH_AES_128_GCM_SHA256": 0x00AA, + "TLS_DHE_PSK_WITH_AES_256_GCM_SHA384": 0x00AB, + "TLS_RSA_PSK_WITH_AES_128_GCM_SHA256": 0x00AC, + "TLS_RSA_PSK_WITH_AES_256_GCM_SHA384": 0x00AD, + "TLS_PSK_WITH_AES_128_CBC_SHA256": 0x00AE, + "TLS_PSK_WITH_AES_256_CBC_SHA384": 0x00AF, + "TLS_PSK_WITH_NULL_SHA256": 0x00B0, + "TLS_PSK_WITH_NULL_SHA384": 0x00B1, + "TLS_DHE_PSK_WITH_AES_128_CBC_SHA256": 0x00B2, + "TLS_DHE_PSK_WITH_AES_256_CBC_SHA384": 0x00B3, + "TLS_DHE_PSK_WITH_NULL_SHA256": 0x00B4, + "TLS_DHE_PSK_WITH_NULL_SHA384": 0x00B5, + "TLS_RSA_PSK_WITH_AES_128_CBC_SHA256": 0x00B6, + "TLS_RSA_PSK_WITH_AES_256_CBC_SHA384": 0x00B7, + "TLS_RSA_PSK_WITH_NULL_SHA256": 0x00B8, + "TLS_RSA_PSK_WITH_NULL_SHA384": 0x00B9, + "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256": 0x00BA, + "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256": 0x00BB, + "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256": 0x00BC, + "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256": 0x00BD, + "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256": 0x00BE, + "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256": 0x00BF, + "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256": 0x00C0, + "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256": 0x00C1, + "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256": 0x00C2, + "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256": 0x00C3, + "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256": 0x00C4, + "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256": 0x00C5, + "TLS_SM4_GCM_SM3": 0x00C6, + "TLS_SM4_CCM_SM3": 0x00C7, + + "TLS_EMPTY_RENEGOTIATION_INFO_SCSV": 0x00FF, + + "TLS_AES_128_GCM_SHA256": 0x1301, + "TLS_AES_256_GCM_SHA384": 0x1302, + "TLS_CHACHA20_POLY1305_SHA256": 0x1303, + "TLS_AES_128_CCM_SHA256": 0x1304, + "TLS_AES_128_CCM_8_SHA256": 0x1305, + "TLS_AEGIS_256_SHA384": 0x1306, + "TLS_AEGIS_128L_SHA256": 0x1307, + + "TLS_FALLBACK_SCSV": 0x5600, + + "TLS_ECDH_ECDSA_WITH_NULL_SHA": 0xC001, + "TLS_ECDH_ECDSA_WITH_RC4_128_SHA": 0xC002, + "TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA": 0xC003, + "TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA": 0xC004, + "TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA": 0xC005, + "TLS_ECDHE_ECDSA_WITH_NULL_SHA": 0xC006, + "TLS_ECDHE_ECDSA_WITH_RC4_128_SHA": 0xC007, + "TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA": 0xC008, + "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA": 0xC009, + "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA": 0xC00A, + "TLS_ECDH_RSA_WITH_NULL_SHA": 0xC00B, + "TLS_ECDH_RSA_WITH_RC4_128_SHA": 0xC00C, + "TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA": 0xC00D, + "TLS_ECDH_RSA_WITH_AES_128_CBC_SHA": 0xC00E, + "TLS_ECDH_RSA_WITH_AES_256_CBC_SHA": 0xC00F, + "TLS_ECDHE_RSA_WITH_NULL_SHA": 0xC010, + "TLS_ECDHE_RSA_WITH_RC4_128_SHA": 0xC011, + "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA": 0xC012, + "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA": 0xC013, + "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA": 0xC014, + "TLS_ECDH_anon_WITH_NULL_SHA": 0xC015, + "TLS_ECDH_anon_WITH_RC4_128_SHA": 0xC016, + "TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA": 0xC017, + "TLS_ECDH_anon_WITH_AES_128_CBC_SHA": 0xC018, + "TLS_ECDH_anon_WITH_AES_256_CBC_SHA": 0xC019, + "TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA": 0xC01A, + "TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA": 0xC01B, + "TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA": 0xC01C, + "TLS_SRP_SHA_WITH_AES_128_CBC_SHA": 0xC01D, + "TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA": 0xC01E, + "TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA": 0xC01F, + "TLS_SRP_SHA_WITH_AES_256_CBC_SHA": 0xC020, + "TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA": 0xC021, + "TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA": 0xC022, + "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256": 0xC023, + "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384": 0xC024, + "TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256": 0xC025, + "TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384": 0xC026, + "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256": 0xC027, + "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384": 0xC028, + "TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256": 0xC029, + "TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384": 0xC02A, + "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256": 0xC02B, + "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384": 0xC02C, + "TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256": 0xC02D, + "TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384": 0xC02E, + "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256": 0xC02F, + "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384": 0xC030, + "TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256": 0xC031, + "TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384": 0xC032, + "TLS_ECDHE_PSK_WITH_RC4_128_SHA": 0xC033, + "TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA": 0xC034, + "TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA": 0xC035, + "TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA": 0xC036, + "TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256": 0xC037, + "TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384": 0xC038, + "TLS_ECDHE_PSK_WITH_NULL_SHA": 0xC039, + "TLS_ECDHE_PSK_WITH_NULL_SHA256": 0xC03A, + "TLS_ECDHE_PSK_WITH_NULL_SHA384": 0xC03B, + "TLS_RSA_WITH_ARIA_128_CBC_SHA256": 0xC03C, + "TLS_RSA_WITH_ARIA_256_CBC_SHA384": 0xC03D, + "TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256": 0xC03E, + "TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384": 0xC03F, + "TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256": 0xC040, + "TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384": 0xC041, + "TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256": 0xC042, + "TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384": 0xC043, + "TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256": 0xC044, + "TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384": 0xC045, + "TLS_DH_anon_WITH_ARIA_128_CBC_SHA256": 0xC046, + "TLS_DH_anon_WITH_ARIA_256_CBC_SHA384": 0xC047, + "TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256": 0xC048, + "TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384": 0xC049, + "TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256": 0xC04A, + "TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384": 0xC04B, + "TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256": 0xC04C, + "TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384": 0xC04D, + "TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256": 0xC04E, + "TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384": 0xC04F, + "TLS_RSA_WITH_ARIA_128_GCM_SHA256": 0xC050, + "TLS_RSA_WITH_ARIA_256_GCM_SHA384": 0xC051, + "TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256": 0xC052, + "TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384": 0xC053, + "TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256": 0xC054, + "TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384": 0xC055, + "TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256": 0xC056, + "TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384": 0xC057, + "TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256": 0xC058, + "TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384": 0xC059, + "TLS_DH_anon_WITH_ARIA_128_GCM_SHA256": 0xC05A, + "TLS_DH_anon_WITH_ARIA_256_GCM_SHA384": 0xC05B, + "TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256": 0xC05C, + "TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384": 0xC05D, + "TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256": 0xC05E, + "TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384": 0xC05F, + "TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256": 0xC060, + "TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384": 0xC061, + "TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256": 0xC062, + "TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384": 0xC063, + "TLS_PSK_WITH_ARIA_128_CBC_SHA256": 0xC064, + "TLS_PSK_WITH_ARIA_256_CBC_SHA384": 0xC065, + "TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256": 0xC066, + "TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384": 0xC067, + "TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256": 0xC068, + "TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384": 0xC069, + "TLS_PSK_WITH_ARIA_128_GCM_SHA256": 0xC06A, + "TLS_PSK_WITH_ARIA_256_GCM_SHA384": 0xC06B, + "TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256": 0xC06C, + "TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384": 0xC06D, + "TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256": 0xC06E, + "TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384": 0xC06F, + "TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256": 0xC070, + "TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384": 0xC071, + "TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256": 0xC072, + "TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384": 0xC073, + "TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256": 0xC074, + "TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384": 0xC075, + "TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256": 0xC076, + "TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384": 0xC077, + "TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256": 0xC078, + "TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384": 0xC079, + "TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC07A, + "TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC07B, + "TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC07C, + "TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC07D, + "TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC07E, + "TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC07F, + "TLS_DHE_DSS_WITH_CAMELLIA_128_GCM_SHA256": 0xC080, + "TLS_DHE_DSS_WITH_CAMELLIA_256_GCM_SHA384": 0xC081, + "TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256": 0xC082, + "TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384": 0xC083, + "TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256": 0xC084, + "TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384": 0xC085, + "TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC086, + "TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC087, + "TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC088, + "TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC089, + "TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC08A, + "TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC08B, + "TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC08C, + "TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC08D, + "TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256": 0xC08E, + "TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384": 0xC08F, + "TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256": 0xC090, + "TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384": 0xC091, + "TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256": 0xC092, + "TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384": 0xC093, + "TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256": 0xC094, + "TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384": 0xC095, + "TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256": 0xC096, + "TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384": 0xC097, + "TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256": 0xC098, + "TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384": 0xC099, + "TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256": 0xC09A, + "TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384": 0xC09B, + "TLS_RSA_WITH_AES_128_CCM": 0xC09C, + "TLS_RSA_WITH_AES_256_CCM": 0xC09D, + "TLS_DHE_RSA_WITH_AES_128_CCM": 0xC09E, + "TLS_DHE_RSA_WITH_AES_256_CCM": 0xC09F, + "TLS_RSA_WITH_AES_128_CCM_8": 0xC0A0, + "TLS_RSA_WITH_AES_256_CCM_8": 0xC0A1, + "TLS_DHE_RSA_WITH_AES_128_CCM_8": 0xC0A2, + "TLS_DHE_RSA_WITH_AES_256_CCM_8": 0xC0A3, + "TLS_PSK_WITH_AES_128_CCM": 0xC0A4, + "TLS_PSK_WITH_AES_256_CCM": 0xC0A5, + "TLS_DHE_PSK_WITH_AES_128_CCM": 0xC0A6, + "TLS_DHE_PSK_WITH_AES_256_CCM": 0xC0A7, + "TLS_PSK_WITH_AES_128_CCM_8": 0xC0A8, + "TLS_PSK_WITH_AES_256_CCM_8": 0xC0A9, + "TLS_PSK_DHE_WITH_AES_128_CCM_8": 0xC0AA, + "TLS_PSK_DHE_WITH_AES_256_CCM_8": 0xC0AB, + "TLS_ECDHE_ECDSA_WITH_AES_128_CCM": 0xC0AC, + "TLS_ECDHE_ECDSA_WITH_AES_256_CCM": 0xC0AD, + "TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8": 0xC0AE, + "TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8": 0xC0AF, + "TLS_ECCPWD_WITH_AES_128_GCM_SHA256": 0xC0B0, + "TLS_ECCPWD_WITH_AES_256_GCM_SHA384": 0xC0B1, + "TLS_ECCPWD_WITH_AES_128_CCM_SHA256": 0xC0B2, + "TLS_ECCPWD_WITH_AES_256_CCM_SHA384": 0xC0B3, + "TLS_SHA256_SHA256": 0xC0B4, + "TLS_SHA384_SHA384": 0xC0B5, + + "TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC": 0xC100, + "TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC": 0xC101, + "TLS_GOSTR341112_256_WITH_28147_CNT_IMIT": 0xC102, + "TLS_GOSTR341112_256_WITH_KUZNYECHIK_MGM_L": 0xC103, + "TLS_GOSTR341112_256_WITH_MAGMA_MGM_L": 0xC104, + "TLS_GOSTR341112_256_WITH_KUZNYECHIK_MGM_S": 0xC105, + "TLS_GOSTR341112_256_WITH_MAGMA_MGM_S": 0xC106, + + "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256": 0xCCA8, + "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256": 0xCCA9, + "TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256": 0xCCAA, + "TLS_PSK_WITH_CHACHA20_POLY1305_SHA256": 0xCCAB, + "TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256": 0xCCAC, + "TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256": 0xCCAD, + "TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256": 0xCCAE, + + "TLS_ECDHE_PSK_WITH_AES_128_GCM_SHA256": 0xD001, + "TLS_ECDHE_PSK_WITH_AES_256_GCM_SHA384": 0xD002, + "TLS_ECDHE_PSK_WITH_AES_128_CCM_8_SHA256": 0xD003, + + "TLS_ECDHE_PSK_WITH_AES_128_CCM_SHA256": 0xD005, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/clientcertificatetype_identifiers.go b/backend/vendor/github.com/gaukas/godicttls/clientcertificatetype_identifiers.go new file mode 100644 index 0000000..56354c9 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/clientcertificatetype_identifiers.go @@ -0,0 +1,49 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-2 +// last updated: March 2023 + +const ( + ClientCertTypeIdentifier_rsa_sign uint8 = 1 + ClientCertTypeIdentifier_dss_sign uint8 = 2 + ClientCertTypeIdentifier_rsa_fixed_dh uint8 = 3 + ClientCertTypeIdentifier_dss_fixed_dh uint8 = 4 + ClientCertTypeIdentifier_rsa_ephemeral_dh uint8 = 5 + ClientCertTypeIdentifier_dss_ephemeral_dh uint8 = 6 + ClientCertTypeIdentifier_fortezza_dms uint8 = 20 + ClientCertTypeIdentifier_ecdsa_sign uint8 = 64 + ClientCertTypeIdentifier_rsa_fixed_ecdh uint8 = 65 + ClientCertTypeIdentifier_ecdsa_fixed_ecdh uint8 = 66 + ClientCertTypeIdentifier_gost_sign256 uint8 = 67 + ClientCertTypeIdentifier_gost_sign512 uint8 = 68 +) + +var DictClientCertificateTypeIdentifierValueIndexed = map[uint8]string{ + 1: "rsa_sign", + 2: "dss_sign", + 3: "rsa_fixed_dh", + 4: "dss_fixed_dh", + 5: "rsa_ephemeral_dh", + 6: "dss_ephemeral_dh", + 20: "fortezza_dms", + 64: "ecdsa_sign", + 65: "rsa_fixed_ecdh", + 66: "ecdsa_fixed_ecdh", + 67: "gost_sign256", + 68: "gost_sign512", +} + +var DictClientCertificateTypeIdentifierNameIndexed = map[string]uint8{ + "rsa_sign": 1, + "dss_sign": 2, + "rsa_fixed_dh": 3, + "dss_fixed_dh": 4, + "rsa_ephemeral_dh": 5, + "dss_ephemeral_dh": 6, + "fortezza_dms": 20, + "ecdsa_sign": 64, + "rsa_fixed_ecdh": 65, + "ecdsa_fixed_ecdh": 66, + "gost_sign256": 67, + "gost_sign512": 68, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/comp_meth_ids.go b/backend/vendor/github.com/gaukas/godicttls/comp_meth_ids.go new file mode 100644 index 0000000..c1d5908 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/comp_meth_ids.go @@ -0,0 +1,22 @@ +package godicttls + +// source: https://www.iana.org/assignments/comp-meth-ids/comp-meth-ids-2.csv +// last updated: March 2023 + +const ( + CompMeth_NULL uint8 = 0 + CompMeth_DEFLATE uint8 = 1 + CompMeth_LZS uint8 = 64 +) + +var DictCompMethValueIndexed = map[uint8]string{ + 0: "NULL", + 1: "DEFLATE", + 64: "LZS", +} + +var DictCompMethNameIndexed = map[string]uint8{ + "NULL": 0, + "DEFLATE": 1, + "LZS": 64, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/contenttype.go b/backend/vendor/github.com/gaukas/godicttls/contenttype.go new file mode 100644 index 0000000..dce2f05 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/contenttype.go @@ -0,0 +1,34 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-5 +// last updated: March 2023 + +const ( + ContentType_change_cipher_spec uint8 = 20 + ContentType_alert uint8 = 21 + ContentType_handshake uint8 = 22 + ContentType_application_data uint8 = 23 + ContentType_heartbeat uint8 = 24 + ContentType_tls12_cid uint8 = 25 + ContentType_ACK uint8 = 26 +) + +var DictContentTypeValueIndexed = map[uint8]string{ + 20: "change_cipher_spec", + 21: "alert", + 22: "handshake", + 23: "application_data", + 24: "heartbeat", + 25: "tls12_cid", + 26: "ACK", +} + +var DictContentTypeNameIndexed = map[string]uint8{ + "change_cipher_spec": 20, + "alert": 21, + "handshake": 22, + "application_data": 23, + "heartbeat": 24, + "tls12_cid": 25, + "ACK": 26, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/ec_curve_types.go b/backend/vendor/github.com/gaukas/godicttls/ec_curve_types.go new file mode 100644 index 0000000..733a86f --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/ec_curve_types.go @@ -0,0 +1,22 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-10 +// last updated: March 2023 + +const ( + ECCurve_explicit_prime uint16 = 1 + ECCurve_explicit_char2 uint16 = 2 + ECCurve_named_curve uint16 = 3 +) + +var DictECCurveTypeValueIndexed = map[uint16]string{ + 1: "explicit_prime", + 2: "explicit_char2", + 3: "named_curve", +} + +var DictECCurveTypeNameIndexed = map[string]uint16{ + "explicit_prime": 1, + "explicit_char2": 2, + "named_curve": 3, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/ec_point_formats.go b/backend/vendor/github.com/gaukas/godicttls/ec_point_formats.go new file mode 100644 index 0000000..e57f198 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/ec_point_formats.go @@ -0,0 +1,22 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-9 +// last updated: March 2023 + +const ( + ECPoint_uncompressed uint8 = 0 + ECPoint_ansiX962_compressed_prime uint8 = 1 + ECPoint_ansiX962_compressed_char2 uint8 = 2 +) + +var DictECPointFormatValueIndexed = map[uint8]string{ + 0: "uncompressed", + 1: "ansiX962_compressed_prime", + 2: "ansiX962_compressed_char2", +} + +var DictECPointFormatNameIndexed = map[string]uint8{ + "uncompressed": 0, + "ansiX962_compressed_prime": 1, + "ansiX962_compressed_char2": 2, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/exttype_values.go b/backend/vendor/github.com/gaukas/godicttls/exttype_values.go new file mode 100644 index 0000000..fc20a48 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/exttype_values.go @@ -0,0 +1,209 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#tls-extensiontype-values-1 +// last updated: March 2023 + +const ( + ExtType_server_name uint16 = 0 + ExtType_max_fragment_length uint16 = 1 + ExtType_client_certificate_url uint16 = 2 + ExtType_trusted_ca_keys uint16 = 3 + ExtType_truncated_hmac uint16 = 4 + ExtType_status_request uint16 = 5 + ExtType_user_mapping uint16 = 6 + ExtType_client_authz uint16 = 7 + ExtType_server_authz uint16 = 8 + ExtType_cert_type uint16 = 9 + ExtType_supported_groups uint16 = 10 + ExtType_ec_point_formats uint16 = 11 + ExtType_srp uint16 = 12 + ExtType_signature_algorithms uint16 = 13 + ExtType_use_srtp uint16 = 14 + ExtType_heartbeat uint16 = 15 + ExtType_application_layer_protocol_negotiation uint16 = 16 + ExtType_status_request_v2 uint16 = 17 + ExtType_signed_certificate_timestamp uint16 = 18 + ExtType_client_certificate_type uint16 = 19 + ExtType_server_certificate_type uint16 = 20 + ExtType_padding uint16 = 21 + ExtType_encrypt_then_mac uint16 = 22 + ExtType_extended_master_secret uint16 = 23 + ExtType_token_binding uint16 = 24 + ExtType_cached_info uint16 = 25 + ExtType_tls_lts uint16 = 26 + ExtType_compress_certificate uint16 = 27 + ExtType_record_size_limit uint16 = 28 + ExtType_pwd_protect uint16 = 29 + ExtType_pwd_clear uint16 = 30 + ExtType_password_salt uint16 = 31 + ExtType_ticket_pinning uint16 = 32 + ExtType_tls_cert_with_extern_psk uint16 = 33 + ExtType_delegated_credentials uint16 = 34 // IANA name: delegated_credentials, IETF name: delegated_credential + ExtType_session_ticket uint16 = 35 + ExtType_TLMSP uint16 = 36 + ExtType_TLMSP_proxying uint16 = 37 + ExtType_TLMSP_delegate uint16 = 38 + ExtType_supported_ekt_ciphers uint16 = 39 + ExtType_pre_shared_key uint16 = 41 + ExtType_early_data uint16 = 42 + ExtType_supported_versions uint16 = 43 + ExtType_cookie uint16 = 44 + ExtType_psk_key_exchange_modes uint16 = 45 + ExtType_certificate_authorities uint16 = 47 + ExtType_oid_filters uint16 = 48 + ExtType_post_handshake_auth uint16 = 49 + ExtType_signature_algorithms_cert uint16 = 50 + ExtType_key_share uint16 = 51 + ExtType_transparency_info uint16 = 52 + ExtType_connection_id_deprecated uint16 = 53 // deprecated + ExtType_connection_id uint16 = 54 + ExtType_external_id_hash uint16 = 55 + ExtType_external_session_id uint16 = 56 + ExtType_quic_transport_parameters uint16 = 57 + ExtType_ticket_request uint16 = 58 + ExtType_dnssec_chain uint16 = 59 + ExtType_renegotiation_info uint16 = 65281 +) + +// Not IANA assigned +const ( + ExtType_next_protocol_negotiation uint16 = 13172 // https://datatracker.ietf.org/doc/html/draft-agl-tls-nextprotoneg-04 + ExtType_application_settings uint16 = 17513 // https://www.ietf.org/archive/id/draft-vvv-tls-alps-01.html + ExtType_channel_id_old uint16 = 30031 // https://datatracker.ietf.org/doc/html/draft-balfanz-tls-channelid-01 + ExtType_channel_id uint16 = 30032 // https://datatracker.ietf.org/doc/html/draft-balfanz-tls-channelid-01 +) + +var DictExtTypeValueIndexed = map[uint16]string{ + 0: "server_name", + 1: "max_fragment_length", + 2: "client_certificate_url", + 3: "trusted_ca_keys", + 4: "truncated_hmac", + 5: "status_request", + 6: "user_mapping", + 7: "client_authz", + 8: "server_authz", + 9: "cert_type", + 10: "supported_groups", + 11: "ec_point_formats", + 12: "srp", + 13: "signature_algorithms", + 14: "use_srtp", + 15: "heartbeat", + 16: "application_layer_protocol_negotiation", + 17: "status_request_v2", + 18: "signed_certificate_timestamp", + 19: "client_certificate_type", + 20: "server_certificate_type", + 21: "padding", + 22: "encrypt_then_mac", + 23: "extended_master_secret", + 24: "token_binding", + 25: "cached_info", + 26: "tls_lts", + 27: "compress_certificate", + 28: "record_size_limit", + 29: "pwd_protect", + 30: "pwd_clear", + 31: "password_salt", + 32: "ticket_pinning", + 33: "tls_cert_with_extern_psk", + 34: "delegated_credentials", // IANA name: delegated_credentials, IETF name: delegated_credential + 35: "session_ticket", + 36: "TLMSP", + 37: "TLMSP_proxying", + 38: "TLMSP_delegate", + 39: "supported_ekt_ciphers", + 41: "pre_shared_key", + 42: "early_data", + 43: "supported_versions", + 44: "cookie", + 45: "psk_key_exchange_modes", + 47: "certificate_authorities", + 48: "oid_filters", + 49: "post_handshake_auth", + 50: "signature_algorithms_cert", + 51: "key_share", + 52: "transparency_info", + 53: "connection_id_deprecated", // deprecated + 54: "connection_id", + 55: "external_id_hash", + 56: "external_session_id", + 57: "quic_transport_parameters", + 58: "ticket_request", + 59: "dnssec_chain", + 65281: "renegotiation_info", + + 13172: "next_protocol_negotiation", + 17513: "application_settings", + 30031: "channel_id_old", + 30032: "channel_id", +} + +var DictExtTypeNameIndexed = map[string]uint16{ + "server_name": 0, + "max_fragment_length": 1, + "client_certificate_url": 2, + "trusted_ca_keys": 3, + "truncated_hmac": 4, + "status_request": 5, + "user_mapping": 6, + "client_authz": 7, + "server_authz": 8, + "cert_type": 9, + "supported_groups": 10, + "ec_point_formats": 11, + "srp": 12, + "signature_algorithms": 13, + "use_srtp": 14, + "heartbeat": 15, + "application_layer_protocol_negotiation": 16, + "status_request_v2": 17, + "signed_certificate_timestamp": 18, + "client_certificate_type": 19, + "server_certificate_type": 20, + "padding": 21, + "encrypt_then_mac": 22, + "extended_master_secret": 23, + "token_binding": 24, + "cached_info": 25, + "tls_lts": 26, + "compress_certificate": 27, + "record_size_limit": 28, + "pwd_protect": 29, + "pwd_clear": 30, + "password_salt": 31, + "ticket_pinning": 32, + "tls_cert_with_extern_psk": 33, + "delegated_credentials": 34, // IANA name: delegated_credentials + "delegated_credential": 34, // IETF name: delegated_credential + "session_ticket": 35, + "TLMSP": 36, + "TLMSP_proxying": 37, + "TLMSP_delegate": 38, + "supported_ekt_ciphers": 39, + "pre_shared_key": 41, + "early_data": 42, + "supported_versions": 43, + "cookie": 44, + "psk_key_exchange_modes": 45, + "certificate_authorities": 47, + "oid_filters": 48, + "post_handshake_auth": 49, + "signature_algorithms_cert": 50, + "key_share": 51, + "transparency_info": 52, + "connection_id_deprecated": 53, // deprecated + "connection_id": 54, + "external_id_hash": 55, + "external_session_id": 56, + "quic_transport_parameters": 57, + "ticket_request": 58, + "dnssec_chain": 59, + "renegotiation_info": 65281, + + "next_protocol_negotiation": 13172, + "application_settings": 17513, + "channel_id_old": 30031, + "channel_id": 30032, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/handshaketype.go b/backend/vendor/github.com/gaukas/godicttls/handshaketype.go new file mode 100644 index 0000000..cafba3b --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/handshaketype.go @@ -0,0 +1,96 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-7 +// last updated: March 2023 + +const ( + HandshakeType_hello_request uint8 = 0 + HandshakeType_client_hello uint8 = 1 + HandshakeType_server_hello uint8 = 2 + HandshakeType_hello_verify_request uint8 = 3 + HandshakeType_new_session_ticket uint8 = 4 + HandshakeType_end_of_early_data uint8 = 5 + HandshakeType_hello_retry_request uint8 = 6 + HandshakeType_encrypted_extensions uint8 = 8 + HandshakeType_request_connection_id uint8 = 9 + HandshakeType_new_connection_id uint8 = 10 + HandshakeType_certificate uint8 = 11 + HandshakeType_server_key_exchange uint8 = 12 + HandshakeType_certificate_request uint8 = 13 + HandshakeType_server_hello_done uint8 = 14 + HandshakeType_certificate_verify uint8 = 15 + HandshakeType_client_key_exchange uint8 = 16 + HandshakeType_client_certificate_request uint8 = 17 + HandshakeType_finished uint8 = 20 + HandshakeType_certificate_url uint8 = 21 + HandshakeType_certificate_status uint8 = 22 + HandshakeType_supplemental_data uint8 = 23 + HandshakeType_key_update uint8 = 24 + HandshakeType_compressed_certificate uint8 = 25 + HandshakeType_ekt_key uint8 = 26 + HandshakeType_message_hash uint8 = 254 + + // Not IANA assigned + HandshakeType_next_protocol uint8 = 67 +) + +var DictHandshakeTypeValueIndexed = map[uint8]string{ + 0: "hello_request", + 1: "client_hello", + 2: "server_hello", + 3: "hello_verify_request", + 4: "new_session_ticket", + 5: "end_of_early_data", + 6: "hello_retry_request", + 7: "Unassigned", + 8: "encrypted_extensions", + 9: "request_connection_id", + 10: "new_connection_id", + 11: "certificate", + 12: "server_key_exchange", + 13: "certificate_request", + 14: "server_hello_done", + 15: "certificate_verify", + 16: "client_key_exchange", + 17: "client_certificate_request", + 20: "finished", + 21: "certificate_url", + 22: "certificate_status", + 23: "supplemental_data", + 24: "key_update", + 25: "compressed_certificate", + 26: "ekt_key", + 254: "message_hash", + + 67: "next_protocol", +} + +var DictHandshakeTypeNameIndexed = map[string]uint8{ + "hello_request": 0, + "client_hello": 1, + "server_hello": 2, + "hello_verify_request": 3, + "new_session_ticket": 4, + "end_of_early_data": 5, + "hello_retry_request": 6, + "encrypted_extensions": 8, + "request_connection_id": 9, + "new_connection_id": 10, + "certificate": 11, + "server_key_exchange": 12, + "certificate_request": 13, + "server_hello_done": 14, + "certificate_verify": 15, + "client_key_exchange": 16, + "client_certificate_request": 17, + "finished": 20, + "certificate_url": 21, + "certificate_status": 22, + "supplemental_data": 23, + "key_update": 24, + "compressed_certificate": 25, + "ekt_key": 26, + "message_hash": 254, + + "next_protocol": 67, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/hashalgorithm.go b/backend/vendor/github.com/gaukas/godicttls/hashalgorithm.go new file mode 100644 index 0000000..420bb0a --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/hashalgorithm.go @@ -0,0 +1,39 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-18 +// last updated: March 2023 + +const ( + HashAlg_none uint8 = 0 // deprecated in TLS 1.3 + HashAlg_md5 uint8 = 1 // deprecated in TLS 1.3 + HashAlg_sha1 uint8 = 2 + HashAlg_sha224 uint8 = 3 // deprecated in TLS 1.3 + HashAlg_sha256 uint8 = 4 + HashAlg_sha384 uint8 = 5 + HashAlg_sha512 uint8 = 6 + HashAlg_Intrinsic uint8 = 8 +) + +var DictHashAlgorithmValueIndexed = map[uint8]string{ + 0: "none", + 1: "md5", + 2: "sha1", + 3: "sha224", + 4: "sha256", + 5: "sha384", + 6: "sha512", + 7: "Reserved", + 8: "Intrinsic", +} + +var DictHashAlgorithmNameIndexed = map[string]uint8{ + "none": 0, + "md5": 1, + "sha1": 2, + "sha224": 3, + "sha256": 4, + "sha384": 5, + "sha512": 6, + "Reserved": 7, + "Intrinsic": 8, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/heartbeat_message_types.go b/backend/vendor/github.com/gaukas/godicttls/heartbeat_message_types.go new file mode 100644 index 0000000..46db1a6 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/heartbeat_message_types.go @@ -0,0 +1,19 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/heartbeat-message-types.csv +// last updated: March 2023 + +const ( + HeartbeatMessage_request uint8 = 1 + HeartbeatMessage_response uint8 = 2 +) + +var DictHeartbeatMessageTypeValueIndexed = map[uint8]string{ + 1: "heartbeat_request", + 2: "heartbeat_response", +} + +var DictHeartbeatMessageTypeNameIndexed = map[string]uint8{ + "heartbeat_request": 1, + "heartbeat_response": 2, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/heartbeat_mode.go b/backend/vendor/github.com/gaukas/godicttls/heartbeat_mode.go new file mode 100644 index 0000000..0847cb2 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/heartbeat_mode.go @@ -0,0 +1,19 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/heartbeat-modes.csv +// last updated: March 2023 + +const ( + HeartbeatMode_peer_allowed_to_send uint8 = 1 + HeartbeatMode_peer_not_allowed_to_send uint8 = 2 +) + +var DictHeartbeatModeValueIndexed = map[uint8]string{ + 1: "peer_allowed_to_send", + 2: "peer_not_allowed_to_send", +} + +var DictHeartbeatModeNameIndexed = map[string]uint8{ + "peer_allowed_to_send": 1, + "peer_not_allowed_to_send": 2, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/kdf_identifiers.go b/backend/vendor/github.com/gaukas/godicttls/kdf_identifiers.go new file mode 100644 index 0000000..f77a0f8 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/kdf_identifiers.go @@ -0,0 +1,19 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-kdf-ids.csv +// last updated: March 2023 + +const ( + HKDF_SHA256 uint16 = 0x0001 + HKDF_SHA384 uint16 = 0x0002 +) + +var DictKDFIdentifierValueIndexed = map[uint16]string{ + 0x0001: "HKDF_SHA256", + 0x0002: "HKDF_SHA384", +} + +var DictKDFIdentifierNameIndexed = map[string]uint16{ + "HKDF_SHA256": 0x0001, + "HKDF_SHA384": 0x0002, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/psk_key_exchange_mode.go b/backend/vendor/github.com/gaukas/godicttls/psk_key_exchange_mode.go new file mode 100644 index 0000000..8df086a --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/psk_key_exchange_mode.go @@ -0,0 +1,19 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-pskkeyexchangemode.csv +// last updated: March 2023 + +const ( + PSKKeyExchangeMode_psk_ke uint8 = 0 + PSKKeyExchangeMode_psk_dhe_ke uint8 = 1 +) + +var DictPSKKeyExchangeModeValueIndexed = map[uint8]string{ + 0: "psk_ke", + 1: "psk_dhe_ke", +} + +var DictPSKKeyExchangeModeNameIndexed = map[string]uint8{ + "psk_ke": 0, + "psk_dhe_ke": 1, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/quic_frame_types.go b/backend/vendor/github.com/gaukas/godicttls/quic_frame_types.go new file mode 100644 index 0000000..b8059d1 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/quic_frame_types.go @@ -0,0 +1,112 @@ +package godicttls + +// source: https://www.iana.org/assignments/quic/quic.xhtml#quic-frame-types +// last updated: July 2023 + +const ( + QUICFrameType_PADDING uint8 = 0x00 + QUICFrameType_PING uint8 = 0x01 + QUICFrameType_ACK uint8 = 0x02 + QUICFrameType_ACK_ecn uint8 = 0x03 + QUICFrameType_RESET_STREAM uint8 = 0x04 + QUICFrameType_STOP_SENDING uint8 = 0x05 + QUICFrameType_CRYPTO uint8 = 0x06 + QUICFrameType_NEW_TOKEN uint8 = 0x07 + QUICFrameType_STREAM uint8 = 0x08 + QUICFrameType_STREAM_fin uint8 = 0x09 + QUICFrameType_STREAM_len uint8 = 0x0a + QUICFrameType_STREAM_len_fin uint8 = 0x0b + QUICFrameType_STREAM_off uint8 = 0x0c + QUICFrameType_STREAM_off_fin uint8 = 0x0d + QUICFrameType_STREAM_off_len uint8 = 0x0e + QUICFrameType_STREAM_off_len_fin uint8 = 0x0f + QUICFrameType_MAX_DATA uint8 = 0x10 + QUICFrameType_MAX_STREAM_DATA uint8 = 0x11 + QUICFrameType_MAX_STREAMS_bidi uint8 = 0x12 + QUICFrameType_MAX_STREAMS_uni uint8 = 0x13 + QUICFrameType_DATA_BLOCKED uint8 = 0x14 + QUICFrameType_STREAM_DATA_BLOCKED uint8 = 0x15 + QUICFrameType_STREAMS_BLOCKED_bidi uint8 = 0x16 + QUICFrameType_STREAMS_BLOCKED_uni uint8 = 0x17 + QUICFrameType_NEW_CONNECTION_ID uint8 = 0x18 + QUICFrameType_RETIRE_CONNECTION_ID uint8 = 0x19 + QUICFrameType_PATH_CHALLENGE uint8 = 0x1a + QUICFrameType_PATH_RESPONSE uint8 = 0x1b + QUICFrameType_CONNECTION_CLOSE uint8 = 0x1c + QUICFrameType_CONNECTION_CLOSE_app uint8 = 0x1d + QUICFrameType_HANDSHAKE_DONE uint8 = 0x1e + QUICFrameType_DATAGRAM uint8 = 0x30 // RFC9221 + QUICFrameType_DATAGRAM_len uint8 = 0x31 // RFC9221 +) + +var DictQUICFrameTypeValueIndexed = map[uint8]string{ + 0x00: "PADDING", + 0x01: "PING", + 0x02: "ACK", + 0x03: "ACK_ecn", + 0x04: "RESET_STREAM", + 0x05: "STOP_SENDING", + 0x06: "CRYPTO", + 0x07: "NEW_TOKEN", + 0x08: "STREAM", + 0x09: "STREAM_fin", + 0x0a: "STREAM_len", + 0x0b: "STREAM_len_fin", + 0x0c: "STREAM_off", + 0x0d: "STREAM_off_fin", + 0x0e: "STREAM_off_len", + 0x0f: "STREAM_off_len_fin", + 0x10: "MAX_DATA", + 0x11: "MAX_STREAM_DATA", + 0x12: "MAX_STREAMS_bidi", + 0x13: "MAX_STREAMS_uni", + 0x14: "DATA_BLOCKED", + 0x15: "STREAM_DATA_BLOCKED", + 0x16: "STREAMS_BLOCKED_bidi", + 0x17: "STREAMS_BLOCKED_uni", + 0x18: "NEW_CONNECTION_ID", + 0x19: "RETIRE_CONNECTION_ID", + 0x1a: "PATH_CHALLENGE", + 0x1b: "PATH_RESPONSE", + 0x1c: "CONNECTION_CLOSE", + 0x1d: "CONNECTION_CLOSE_app", + 0x1e: "HANDSHAKE_DONE", + 0x30: "DATAGRAM", + 0x31: "DATAGRAM_len", +} + +var DictQUICFrameTypeNameIndexed = map[string]uint8{ + "PADDING": 0x00, + "PING": 0x01, + "ACK": 0x02, + "ACK_ecn": 0x03, + "RESET_STREAM": 0x04, + "STOP_SENDING": 0x05, + "CRYPTO": 0x06, + "NEW_TOKEN": 0x07, + "STREAM": 0x08, + "STREAM_fin": 0x09, + "STREAM_len": 0x0a, + "STREAM_len_fin": 0x0b, + "STREAM_off": 0x0c, + "STREAM_off_fin": 0x0d, + "STREAM_off_len": 0x0e, + "STREAM_off_len_fin": 0x0f, + "MAX_DATA": 0x10, + "MAX_STREAM_DATA": 0x11, + "MAX_STREAMS_bidi": 0x12, + "MAX_STREAMS_uni": 0x13, + "DATA_BLOCKED": 0x14, + "STREAM_DATA_BLOCKED": 0x15, + "STREAMS_BLOCKED_bidi": 0x16, + "STREAMS_BLOCKED_uni": 0x17, + "NEW_CONNECTION_ID": 0x18, + "RETIRE_CONNECTION_ID": 0x19, + "PATH_CHALLENGE": 0x1a, + "PATH_RESPONSE": 0x1b, + "CONNECTION_CLOSE": 0x1c, + "CONNECTION_CLOSE_app": 0x1d, + "HANDSHAKE_DONE": 0x1e, + "DATAGRAM": 0x30, + "DATAGRAM_len": 0x31, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/quic_transport_error_codes.go b/backend/vendor/github.com/gaukas/godicttls/quic_transport_error_codes.go new file mode 100644 index 0000000..6824e83 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/quic_transport_error_codes.go @@ -0,0 +1,70 @@ +package godicttls + +// source: https://www.iana.org/assignments/quic/quic.xhtml#quic-transport-error-codes +// last updated: July 2023 + +const ( + QUICTransportErrorCode_NO_ERROR uint16 = 0x0000 + QUICTransportErrorCode_INTERNAL_ERROR uint16 = 0x0001 + QUICTransportErrorCode_CONNECTION_REFUSED uint16 = 0x0002 + QUICTransportErrorCode_FLOW_CONTROL_ERROR uint16 = 0x0003 + QUICTransportErrorCode_STREAM_LIMIT_ERROR uint16 = 0x0004 + QUICTransportErrorCode_STREAM_STATE_ERROR uint16 = 0x0005 + QUICTransportErrorCode_FINAL_SIZE_ERROR uint16 = 0x0006 + QUICTransportErrorCode_FRAME_ENCODING_ERROR uint16 = 0x0007 + QUICTransportErrorCode_TRANSPORT_PARAMETER_ERROR uint16 = 0x0008 + QUICTransportErrorCode_CONNECTION_ID_LIMIT_ERROR uint16 = 0x0009 + QUICTransportErrorCode_PROTOCOL_VIOLATION uint16 = 0x000A + QUICTransportErrorCode_INVALID_TOKEN uint16 = 0x000B + QUICTransportErrorCode_APPLICATION_ERROR uint16 = 0x000C + QUICTransportErrorCode_CRYPTO_BUFFER_EXCEEDED uint16 = 0x000D + QUICTransportErrorCode_KEY_UPDATE_ERROR uint16 = 0x000E + QUICTransportErrorCode_AEAD_LIMIT_REACHED uint16 = 0x000F + QUICTransportErrorCode_NO_VIABLE_PATH uint16 = 0x0010 + QUICTransportErrorCode_VERSION_NEGOTIATION_ERROR uint16 = 0x0011 // RFC9368 + QUICTransportErrorCode_CRYPTO_ERROR uint16 = 0x0100 // 0x0100-0x01FF, use with bitwise operator +) + +var DictQUICTransportErrorCodeValueIndexed = map[uint16]string{ + 0x0000: "NO_ERROR", + 0x0001: "INTERNAL_ERROR", + 0x0002: "CONNECTION_REFUSED", + 0x0003: "FLOW_CONTROL_ERROR", + 0x0004: "STREAM_LIMIT_ERROR", + 0x0005: "STREAM_STATE_ERROR", + 0x0006: "FINAL_SIZE_ERROR", + 0x0007: "FRAME_ENCODING_ERROR", + 0x0008: "TRANSPORT_PARAMETER_ERROR", + 0x0009: "CONNECTION_ID_LIMIT_ERROR", + 0x000A: "PROTOCOL_VIOLATION", + 0x000B: "INVALID_TOKEN", + 0x000C: "APPLICATION_ERROR", + 0x000D: "CRYPTO_BUFFER_EXCEEDED", + 0x000E: "KEY_UPDATE_ERROR", + 0x000F: "AEAD_LIMIT_REACHED", + 0x0010: "NO_VIABLE_PATH", + 0x0011: "VERSION_NEGOTIATION_ERROR", + 0x0100: "CRYPTO_ERROR", +} + +var DictQUICTransportErrorCodeNameIndexed = map[string]uint16{ + "NO_ERROR": 0x0000, + "INTERNAL_ERROR": 0x0001, + "CONNECTION_REFUSED": 0x0002, + "FLOW_CONTROL_ERROR": 0x0003, + "STREAM_LIMIT_ERROR": 0x0004, + "STREAM_STATE_ERROR": 0x0005, + "FINAL_SIZE_ERROR": 0x0006, + "FRAME_ENCODING_ERROR": 0x0007, + "TRANSPORT_PARAMETER_ERROR": 0x0008, + "CONNECTION_ID_LIMIT_ERROR": 0x0009, + "PROTOCOL_VIOLATION": 0x000A, + "INVALID_TOKEN": 0x000B, + "APPLICATION_ERROR": 0x000C, + "CRYPTO_BUFFER_EXCEEDED": 0x000D, + "KEY_UPDATE_ERROR": 0x000E, + "AEAD_LIMIT_REACHED": 0x000F, + "NO_VIABLE_PATH": 0x0010, + "VERSION_NEGOTIATION_ERROR": 0x0011, + "CRYPTO_ERROR": 0x0100, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/quic_transport_parameters.go b/backend/vendor/github.com/gaukas/godicttls/quic_transport_parameters.go new file mode 100644 index 0000000..1e2f3b9 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/quic_transport_parameters.go @@ -0,0 +1,91 @@ +package godicttls + +// source: https://www.iana.org/assignments/quic/quic.xhtml#quic-transport +// last updated: July 2023 + +const ( + QUICTransportParameter_original_destination_connection_id uint64 = 0x00 + QUICTransportParameter_max_idle_timeout uint64 = 0x01 + QUICTransportParameter_stateless_reset_token uint64 = 0x02 + QUICTransportParameter_max_udp_payload_size uint64 = 0x03 + QUICTransportParameter_initial_max_data uint64 = 0x04 + QUICTransportParameter_initial_max_stream_data_bidi_local uint64 = 0x05 + QUICTransportParameter_initial_max_stream_data_bidi_remote uint64 = 0x06 + QUICTransportParameter_initial_max_stream_data_uni uint64 = 0x07 + QUICTransportParameter_initial_max_streams_bidi uint64 = 0x08 + QUICTransportParameter_initial_max_streams_uni uint64 = 0x09 + QUICTransportParameter_ack_delay_exponent uint64 = 0x0a + QUICTransportParameter_max_ack_delay uint64 = 0x0b + QUICTransportParameter_disable_active_migration uint64 = 0x0c + QUICTransportParameter_preferred_address uint64 = 0x0d + QUICTransportParameter_active_connection_id_limit uint64 = 0x0e + QUICTransportParameter_initial_source_connection_id uint64 = 0x0f + QUICTransportParameter_retry_source_connection_id uint64 = 0x10 + QUICTransportParameter_version_information uint64 = 0x11 // RFC9368 + QUICTransportParameter_max_datagram_frame_size uint64 = 0x20 // RFC9221 + QUICTransportParameter_discard uint64 = 0x173e // David_Schinazi: Receiver silently discards. https://github.com/quicwg/base-drafts/wiki/Quantum-Readiness-test + QUICTransportParameter_google_handshake_message uint64 = 0x26ab // Google: Used to carry Google internal handshake message + QUICTransportParameter_grease_quic_bit uint64 = 0x2ab2 // RFC9287 + QUICTransportParameter_initial_rtt uint64 = 0x3127 // Google: Initial RTT in microseconds + QUICTransportParameter_google_connection_options uint64 = 0x3128 // Google: Google connection options for experimentation + QUICTransportParameter_user_agent uint64 = 0x3129 // Google: User agent string (deprecated) + QUICTransportParameter_google_version uint64 = 0x4752 // Google: Google QUIC version downgrade prevention +) + +var DictQUICTransportParameterValueIndexed = map[uint64]string{ + 0x00: "original_destination_connection_id", + 0x01: "max_idle_timeout", + 0x02: "stateless_reset_token", + 0x03: "max_udp_payload_size", + 0x04: "initial_max_data", + 0x05: "initial_max_stream_data_bidi_local", + 0x06: "initial_max_stream_data_bidi_remote", + 0x07: "initial_max_stream_data_uni", + 0x08: "initial_max_streams_bidi", + 0x09: "initial_max_streams_uni", + 0x0a: "ack_delay_exponent", + 0x0b: "max_ack_delay", + 0x0c: "disable_active_migration", + 0x0d: "preferred_address", + 0x0e: "active_connection_id_limit", + 0x0f: "initial_source_connection_id", + 0x10: "retry_source_connection_id", + 0x11: "version_information", + 0x20: "max_datagram_frame_size", + 0x173e: "discard", + 0x26ab: "google handshake message", + 0x2ab2: "grease_quic_bit", + 0x3127: "initial_rtt", + 0x3128: "google_connection_options", + 0x3129: "user_agent", + 0x4752: "google_version", +} + +var DictQUICTransportParameterNameIndexed = map[string]uint64{ + "original_destination_connection_id": 0x00, + "max_idle_timeout": 0x01, + "stateless_reset_token": 0x02, + "max_udp_payload_size": 0x03, + "initial_max_data": 0x04, + "initial_max_stream_data_bidi_local": 0x05, + "initial_max_stream_data_bidi_remote": 0x06, + "initial_max_stream_data_uni": 0x07, + "initial_max_streams_bidi": 0x08, + "initial_max_streams_uni": 0x09, + "ack_delay_exponent": 0x0a, + "max_ack_delay": 0x0b, + "disable_active_migration": 0x0c, + "preferred_address": 0x0d, + "active_connection_id_limit": 0x0e, + "initial_source_connection_id": 0x0f, + "retry_source_connection_id": 0x10, + "version_information": 0x11, + "max_datagram_frame_size": 0x20, + "discard": 0x173e, + "google handshake message": 0x26ab, + "grease_quic_bit": 0x2ab2, + "initial_rtt": 0x3127, + "google_connection_options": 0x3128, + "user_agent": 0x3129, + "google_version": 0x4752, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/signaturealgorithm.go b/backend/vendor/github.com/gaukas/godicttls/signaturealgorithm.go new file mode 100644 index 0000000..e219dfc --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/signaturealgorithm.go @@ -0,0 +1,41 @@ +package godicttls + +// Note: values in this file was used in TLS 1.2's signature_algorithms extension +// in combination with the values in hashalgorithm.go. +// signature_algorithms extension in TLS 1.3 uses values in signaturescheme.go + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-16 +// last updated: March 2023 + +const ( + SigAlg_anonymous uint8 = 0 // deprecated in TLS 1.3 + SigAlg_rsa uint8 = 1 + SigAlg_dsa uint8 = 2 // deprecated in TLS 1.3 + SigAlg_ecdsa uint8 = 3 + SigAlg_ed25519 uint8 = 7 + SigAlg_ed448 uint8 = 8 + SigAlg_gostr34102012_256 uint8 = 64 // value changed in TLS 1.3, to 0x0709-0x070C + SigAlg_gostr34102012_512 uint8 = 65 // value changed in TLS 1.3, to 0x070D-0x070F +) + +var DictSignatureAlgorithmValueIndexed = map[uint8]string{ + 0: "anonymous", + 1: "rsa", + 2: "dsa", + 3: "ecdsa", + 7: "ed25519", + 8: "ed448", + 64: "gostr34102012_256", + 65: "gostr34102012_512", +} + +var DictSignatureAlgorithmNameIndexed = map[string]uint8{ + "anonymous": 0, + "rsa": 1, + "dsa": 2, + "ecdsa": 3, + "ed25519": 7, + "ed448": 8, + "gostr34102012_256": 64, + "gostr34102012_512": 65, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/signaturescheme.go b/backend/vendor/github.com/gaukas/godicttls/signaturescheme.go new file mode 100644 index 0000000..969eca8 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/signaturescheme.go @@ -0,0 +1,116 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-signaturescheme.csv +// last updated: March 2023 + +const ( + SigScheme_rsa_pkcs1_sha1 uint16 = 0x0201 + SigScheme_ecdsa_sha1 uint16 = 0x0203 + SigScheme_rsa_pkcs1_sha256 uint16 = 0x0401 + SigScheme_ecdsa_secp256r1_sha256 uint16 = 0x0403 + SigScheme_rsa_pkcs1_sha256_legacy uint16 = 0x0420 + SigScheme_rsa_pkcs1_sha384 uint16 = 0x0501 + SigScheme_ecdsa_secp384r1_sha384 uint16 = 0x0503 + SigScheme_rsa_pkcs1_sha384_legacy uint16 = 0x0520 + SigScheme_rsa_pkcs1_sha512 uint16 = 0x0601 + SigScheme_ecdsa_secp521r1_sha512 uint16 = 0x0603 + SigScheme_rsa_pkcs1_sha512_legacy uint16 = 0x0620 + SigScheme_eccsi_sha256 uint16 = 0x0704 + SigScheme_iso_ibs1 uint16 = 0x0705 + SigScheme_iso_ibs2 uint16 = 0x0706 + SigScheme_iso_chinese_ibs uint16 = 0x0707 + SigScheme_sm2sig_sm3 uint16 = 0x0708 + SigScheme_gostr34102012_256a uint16 = 0x0709 + SigScheme_gostr34102012_256b uint16 = 0x070A + SigScheme_gostr34102012_256c uint16 = 0x070B + SigScheme_gostr34102012_256d uint16 = 0x070C + SigScheme_gostr34102012_512a uint16 = 0x070D + SigScheme_gostr34102012_512b uint16 = 0x070E + SigScheme_gostr34102012_512c uint16 = 0x070F + SigScheme_rsa_pss_rsae_sha256 uint16 = 0x0804 + SigScheme_rsa_pss_rsae_sha384 uint16 = 0x0805 + SigScheme_rsa_pss_rsae_sha512 uint16 = 0x0806 + SigScheme_ed25519 uint16 = 0x0807 + SigScheme_ed448 uint16 = 0x0808 + SigScheme_rsa_pss_pss_sha256 uint16 = 0x0809 + SigScheme_rsa_pss_pss_sha384 uint16 = 0x080A + SigScheme_rsa_pss_pss_sha512 uint16 = 0x080B + SigScheme_ecdsa_brainpoolP256r1tls13_sha256 uint16 = 0x081A + SigScheme_ecdsa_brainpoolP384r1tls13_sha384 uint16 = 0x081B + SigScheme_ecdsa_brainpoolP512r1tls13_sha512 uint16 = 0x081C +) + +var DictSignatureSchemeValueIndexed = map[uint16]string{ + 0x0201: "rsa_pkcs1_sha1", + 0x0203: "ecdsa_sha1", + 0x0401: "rsa_pkcs1_sha256", + 0x0403: "ecdsa_secp256r1_sha256", + 0x0420: "rsa_pkcs1_sha256_legacy", + 0x0501: "rsa_pkcs1_sha384", + 0x0503: "ecdsa_secp384r1_sha384", + 0x0520: "rsa_pkcs1_sha384_legacy", + 0x0601: "rsa_pkcs1_sha512", + 0x0603: "ecdsa_secp521r1_sha512", + 0x0620: "rsa_pkcs1_sha512_legacy", + 0x0704: "eccsi_sha256", + 0x0705: "iso_ibs1", + 0x0706: "iso_ibs2", + 0x0707: "iso_chinese_ibs", + 0x0708: "sm2sig_sm3", + 0x0709: "gostr34102012_256a", + 0x070A: "gostr34102012_256b", + 0x070B: "gostr34102012_256c", + 0x070C: "gostr34102012_256d", + 0x070D: "gostr34102012_512a", + 0x070E: "gostr34102012_512b", + 0x070F: "gostr34102012_512c", + 0x0804: "rsa_pss_rsae_sha256", + 0x0805: "rsa_pss_rsae_sha384", + 0x0806: "rsa_pss_rsae_sha512", + 0x0807: "ed25519", + 0x0808: "ed448", + 0x0809: "rsa_pss_pss_sha256", + 0x080A: "rsa_pss_pss_sha384", + 0x080B: "rsa_pss_pss_sha512", + 0x081A: "ecdsa_brainpoolP256r1tls13_sha256", + 0x081B: "ecdsa_brainpoolP384r1tls13_sha384", + 0x081C: "ecdsa_brainpoolP512r1tls13_sha512", +} + +var DictSignatureSchemeNameIndexed = map[string]uint16{ + "rsa_pkcs1_sha1": 0x0201, + "Reserved for backward compatibility": 0x0202, + "ecdsa_sha1": 0x0203, + "rsa_pkcs1_sha256": 0x0401, + "ecdsa_secp256r1_sha256": 0x0403, + "rsa_pkcs1_sha256_legacy": 0x0420, + "rsa_pkcs1_sha384": 0x0501, + "ecdsa_secp384r1_sha384": 0x0503, + "rsa_pkcs1_sha384_legacy": 0x0520, + "rsa_pkcs1_sha512": 0x0601, + "ecdsa_secp521r1_sha512": 0x0603, + "rsa_pkcs1_sha512_legacy": 0x0620, + "eccsi_sha256": 0x0704, + "iso_ibs1": 0x0705, + "iso_ibs2": 0x0706, + "iso_chinese_ibs": 0x0707, + "sm2sig_sm3": 0x0708, + "gostr34102012_256a": 0x0709, + "gostr34102012_256b": 0x070A, + "gostr34102012_256c": 0x070B, + "gostr34102012_256d": 0x070C, + "gostr34102012_512a": 0x070D, + "gostr34102012_512b": 0x070E, + "gostr34102012_512c": 0x070F, + "rsa_pss_rsae_sha256": 0x0804, + "rsa_pss_rsae_sha384": 0x0805, + "rsa_pss_rsae_sha512": 0x0806, + "ed25519": 0x0807, + "ed448": 0x0808, + "rsa_pss_pss_sha256": 0x0809, + "rsa_pss_pss_sha384": 0x080A, + "rsa_pss_pss_sha512": 0x080B, + "ecdsa_brainpoolP256r1tls13_sha256": 0x081A, + "ecdsa_brainpoolP384r1tls13_sha384": 0x081B, + "ecdsa_brainpoolP512r1tls13_sha512": 0x081C, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/supplemental_data_formats.go b/backend/vendor/github.com/gaukas/godicttls/supplemental_data_formats.go new file mode 100644 index 0000000..2ea74f7 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/supplemental_data_formats.go @@ -0,0 +1,19 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-12 +// last updated: March 2023 + +const ( + SupplementalDataType_user_mapping_data uint16 = 0 + SupplementalDataType_authz_data uint16 = 16386 +) + +var DictSupplementalDataFormatValueIndexed = map[uint16]string{ + 0: "user_mapping_data", + 16386: "authz_data", +} + +var DictSupplementalDataFormatNameIndexed = map[string]uint16{ + "user_mapping_data": 0, + "authz_data": 16386, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/supported_groups.go b/backend/vendor/github.com/gaukas/godicttls/supported_groups.go new file mode 100644 index 0000000..1daea63 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/supported_groups.go @@ -0,0 +1,157 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-8 +// last updated: March 2023 + +const ( + SupportedGroups_sect163k1 uint16 = 1 + SupportedGroups_sect163r1 uint16 = 2 + SupportedGroups_sect163r2 uint16 = 3 + SupportedGroups_sect193r1 uint16 = 4 + SupportedGroups_sect193r2 uint16 = 5 + SupportedGroups_sect233k1 uint16 = 6 + SupportedGroups_sect233r1 uint16 = 7 + SupportedGroups_sect239k1 uint16 = 8 + SupportedGroups_sect283k1 uint16 = 9 + SupportedGroups_sect283r1 uint16 = 10 + SupportedGroups_sect409k1 uint16 = 11 + SupportedGroups_sect409r1 uint16 = 12 + SupportedGroups_sect571k1 uint16 = 13 + SupportedGroups_sect571r1 uint16 = 14 + SupportedGroups_secp160k1 uint16 = 15 + SupportedGroups_secp160r1 uint16 = 16 + SupportedGroups_secp160r2 uint16 = 17 + SupportedGroups_secp192k1 uint16 = 18 + SupportedGroups_secp192r1 uint16 = 19 + SupportedGroups_secp224k1 uint16 = 20 + SupportedGroups_secp224r1 uint16 = 21 + SupportedGroups_secp256k1 uint16 = 22 + SupportedGroups_secp256r1 uint16 = 23 + SupportedGroups_secp384r1 uint16 = 24 + SupportedGroups_secp521r1 uint16 = 25 + SupportedGroups_brainpoolP256r1 uint16 = 26 + SupportedGroups_brainpoolP384r1 uint16 = 27 + SupportedGroups_brainpoolP512r1 uint16 = 28 + SupportedGroups_x25519 uint16 = 29 + SupportedGroups_x448 uint16 = 30 + SupportedGroups_brainpoolP256r1tls13 uint16 = 31 + SupportedGroups_brainpoolP384r1tls13 uint16 = 32 + SupportedGroups_brainpoolP512r1tls13 uint16 = 33 + SupportedGroups_GC256A uint16 = 34 + SupportedGroups_GC256B uint16 = 35 + SupportedGroups_GC256C uint16 = 36 + SupportedGroups_GC256D uint16 = 37 + SupportedGroups_GC512A uint16 = 38 + SupportedGroups_GC512B uint16 = 39 + SupportedGroups_GC512C uint16 = 40 + SupportedGroups_curveSM2 uint16 = 41 + SupportedGroups_ffdhe2048 uint16 = 256 + SupportedGroups_ffdhe3072 uint16 = 257 + SupportedGroups_ffdhe4096 uint16 = 258 + SupportedGroups_ffdhe6144 uint16 = 259 + SupportedGroups_ffdhe8192 uint16 = 260 + SupportedGroups_arbitrary_explicit_prime_curves uint16 = 65281 + SupportedGroups_arbitrary_explicit_char2_curves uint16 = 65282 +) + +var DictSupportedGroupsValueIndexed = map[uint16]string{ + 1: "sect163k1", + 2: "sect163r1", + 3: "sect163r2", + 4: "sect193r1", + 5: "sect193r2", + 6: "sect233k1", + 7: "sect233r1", + 8: "sect239k1", + 9: "sect283k1", + 10: "sect283r1", + 11: "sect409k1", + 12: "sect409r1", + 13: "sect571k1", + 14: "sect571r1", + 15: "secp160k1", + 16: "secp160r1", + 17: "secp160r2", + 18: "secp192k1", + 19: "secp192r1", + 20: "secp224k1", + 21: "secp224r1", + 22: "secp256k1", + 23: "secp256r1", + 24: "secp384r1", + 25: "secp521r1", + 26: "brainpoolP256r1", + 27: "brainpoolP384r1", + 28: "brainpoolP512r1", + 29: "x25519", + 30: "x448", + 31: "brainpoolP256r1tls13", + 32: "brainpoolP384r1tls13", + 33: "brainpoolP512r1tls13", + 34: "GC256A", + 35: "GC256B", + 36: "GC256C", + 37: "GC256D", + 38: "GC512A", + 39: "GC512B", + 40: "GC512C", + 41: "curveSM2", + 256: "ffdhe2048", + 257: "ffdhe3072", + 258: "ffdhe4096", + 259: "ffdhe6144", + 260: "ffdhe8192", + 65281: "arbitrary_explicit_prime_curves", + 65282: "arbitrary_explicit_char2_curves", +} + +var DictSupportedGroupsNameIndexed = map[string]uint16{ + "sect163k1": 1, + "sect163r1": 2, + "sect163r2": 3, + "sect193r1": 4, + "sect193r2": 5, + "sect233k1": 6, + "sect233r1": 7, + "sect239k1": 8, + "sect283k1": 9, + "sect283r1": 10, + "sect409k1": 11, + "sect409r1": 12, + "sect571k1": 13, + "sect571r1": 14, + "secp160k1": 15, + "secp160r1": 16, + "secp160r2": 17, + "secp192k1": 18, + "secp192r1": 19, + "secp224k1": 20, + "secp224r1": 21, + "secp256k1": 22, + "secp256r1": 23, + "secp384r1": 24, + "secp521r1": 25, + "brainpoolP256r1": 26, + "brainpoolP384r1": 27, + "brainpoolP512r1": 28, + "x25519": 29, + "x448": 30, + "brainpoolP256r1tls13": 31, + "brainpoolP384r1tls13": 32, + "brainpoolP512r1tls13": 33, + "GC256A": 34, + "GC256B": 35, + "GC256C": 36, + "GC256D": 37, + "GC512A": 38, + "GC512B": 39, + "GC512C": 40, + "curveSM2": 41, + "ffdhe2048": 256, + "ffdhe3072": 257, + "ffdhe4096": 258, + "ffdhe6144": 259, + "ffdhe8192": 260, + "arbitrary_explicit_prime_curves": 65281, + "arbitrary_explicit_char2_curves": 65282, +} diff --git a/backend/vendor/github.com/gaukas/godicttls/usermappingtype_values.go b/backend/vendor/github.com/gaukas/godicttls/usermappingtype_values.go new file mode 100644 index 0000000..7910842 --- /dev/null +++ b/backend/vendor/github.com/gaukas/godicttls/usermappingtype_values.go @@ -0,0 +1,16 @@ +package godicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-14 +// last updated: March 2023 + +const ( + UserMappingType_upn_domain_hint uint8 = 64 +) + +var DictUserMappingTypeValueIndexed = map[uint8]string{ + 64: "upn_domain_hint", +} + +var DictUserMappingTypeNameIndexed = map[string]uint8{ + "upn_domain_hint": 64, +} diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/.editorconfig b/backend/vendor/github.com/go-task/slim-sprig/v3/.editorconfig new file mode 100644 index 0000000..b0c9536 --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/.editorconfig @@ -0,0 +1,14 @@ +# editorconfig.org + +root = true + +[*] +insert_final_newline = true +charset = utf-8 +trim_trailing_whitespace = true +indent_style = tab +indent_size = 8 + +[*.{md,yml,yaml,json}] +indent_style = space +indent_size = 2 diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/.gitattributes b/backend/vendor/github.com/go-task/slim-sprig/v3/.gitattributes new file mode 100644 index 0000000..176a458 --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/.gitattributes @@ -0,0 +1 @@ +* text=auto diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/.gitignore b/backend/vendor/github.com/go-task/slim-sprig/v3/.gitignore new file mode 100644 index 0000000..5e3002f --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/.gitignore @@ -0,0 +1,2 @@ +vendor/ +/.glide diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/CHANGELOG.md b/backend/vendor/github.com/go-task/slim-sprig/v3/CHANGELOG.md new file mode 100644 index 0000000..2ce45dd --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/CHANGELOG.md @@ -0,0 +1,383 @@ +# Changelog + +## Release 3.2.3 (2022-11-29) + +### Changed + +- Updated docs (thanks @book987 @aJetHorn @neelayu @pellizzetti @apricote @SaigyoujiYuyuko233 @AlekSi) +- #348: Updated huandu/xstrings which fixed a snake case bug (thanks @yxxhero) +- #353: Updated masterminds/semver which included bug fixes +- #354: Updated golang.org/x/crypto which included bug fixes + +## Release 3.2.2 (2021-02-04) + +This is a re-release of 3.2.1 to satisfy something with the Go module system. + +## Release 3.2.1 (2021-02-04) + +### Changed + +- Upgraded `Masterminds/goutils` to `v1.1.1`. see the [Security Advisory](https://github.com/Masterminds/goutils/security/advisories/GHSA-xg2h-wx96-xgxr) + +## Release 3.2.0 (2020-12-14) + +### Added + +- #211: Added randInt function (thanks @kochurovro) +- #223: Added fromJson and mustFromJson functions (thanks @mholt) +- #242: Added a bcrypt function (thanks @robbiet480) +- #253: Added randBytes function (thanks @MikaelSmith) +- #254: Added dig function for dicts (thanks @nyarly) +- #257: Added regexQuoteMeta for quoting regex metadata (thanks @rheaton) +- #261: Added filepath functions osBase, osDir, osExt, osClean, osIsAbs (thanks @zugl) +- #268: Added and and all functions for testing conditions (thanks @phuslu) +- #181: Added float64 arithmetic addf, add1f, subf, divf, mulf, maxf, and minf + (thanks @andrewmostello) +- #265: Added chunk function to split array into smaller arrays (thanks @karelbilek) +- #270: Extend certificate functions to handle non-RSA keys + add support for + ed25519 keys (thanks @misberner) + +### Changed + +- Removed testing and support for Go 1.12. ed25519 support requires Go 1.13 or newer +- Using semver 3.1.1 and mergo 0.3.11 + +### Fixed + +- #249: Fix htmlDateInZone example (thanks @spawnia) + +NOTE: The dependency github.com/imdario/mergo reverted the breaking change in +0.3.9 via 0.3.10 release. + +## Release 3.1.0 (2020-04-16) + +NOTE: The dependency github.com/imdario/mergo made a behavior change in 0.3.9 +that impacts sprig functionality. Do not use sprig with a version newer than 0.3.8. + +### Added + +- #225: Added support for generating htpasswd hash (thanks @rustycl0ck) +- #224: Added duration filter (thanks @frebib) +- #205: Added `seq` function (thanks @thadc23) + +### Changed + +- #203: Unlambda functions with correct signature (thanks @muesli) +- #236: Updated the license formatting for GitHub display purposes +- #238: Updated package dependency versions. Note, mergo not updated to 0.3.9 + as it causes a breaking change for sprig. That issue is tracked at + https://github.com/imdario/mergo/issues/139 + +### Fixed + +- #229: Fix `seq` example in docs (thanks @kalmant) + +## Release 3.0.2 (2019-12-13) + +### Fixed + +- #220: Updating to semver v3.0.3 to fix issue with <= ranges +- #218: fix typo elyptical->elliptic in ecdsa key description (thanks @laverya) + +## Release 3.0.1 (2019-12-08) + +### Fixed + +- #212: Updated semver fixing broken constraint checking with ^0.0 + +## Release 3.0.0 (2019-10-02) + +### Added + +- #187: Added durationRound function (thanks @yjp20) +- #189: Added numerous template functions that return errors rather than panic (thanks @nrvnrvn) +- #193: Added toRawJson support (thanks @Dean-Coakley) +- #197: Added get support to dicts (thanks @Dean-Coakley) + +### Changed + +- #186: Moving dependency management to Go modules +- #186: Updated semver to v3. This has changes in the way ^ is handled +- #194: Updated documentation on merging and how it copies. Added example using deepCopy +- #196: trunc now supports negative values (thanks @Dean-Coakley) + +## Release 2.22.0 (2019-10-02) + +### Added + +- #173: Added getHostByName function to resolve dns names to ips (thanks @fcgravalos) +- #195: Added deepCopy function for use with dicts + +### Changed + +- Updated merge and mergeOverwrite documentation to explain copying and how to + use deepCopy with it + +## Release 2.21.0 (2019-09-18) + +### Added + +- #122: Added encryptAES/decryptAES functions (thanks @n0madic) +- #128: Added toDecimal support (thanks @Dean-Coakley) +- #169: Added list contcat (thanks @astorath) +- #174: Added deepEqual function (thanks @bonifaido) +- #170: Added url parse and join functions (thanks @astorath) + +### Changed + +- #171: Updated glide config for Google UUID to v1 and to add ranges to semver and testify + +### Fixed + +- #172: Fix semver wildcard example (thanks @piepmatz) +- #175: Fix dateInZone doc example (thanks @s3than) + +## Release 2.20.0 (2019-06-18) + +### Added + +- #164: Adding function to get unix epoch for a time (@mattfarina) +- #166: Adding tests for date_in_zone (@mattfarina) + +### Changed + +- #144: Fix function comments based on best practices from Effective Go (@CodeLingoTeam) +- #150: Handles pointer type for time.Time in "htmlDate" (@mapreal19) +- #161, #157, #160, #153, #158, #156, #155, #159, #152 documentation updates (@badeadan) + +### Fixed + +## Release 2.19.0 (2019-03-02) + +IMPORTANT: This release reverts a change from 2.18.0 + +In the previous release (2.18), we prematurely merged a partial change to the crypto functions that led to creating two sets of crypto functions (I blame @technosophos -- since that's me). This release rolls back that change, and does what was originally intended: It alters the existing crypto functions to use secure random. + +We debated whether this classifies as a change worthy of major revision, but given the proximity to the last release, we have decided that treating 2.18 as a faulty release is the correct course of action. We apologize for any inconvenience. + +### Changed + +- Fix substr panic 35fb796 (Alexey igrychev) +- Remove extra period 1eb7729 (Matthew Lorimor) +- Make random string functions use crypto by default 6ceff26 (Matthew Lorimor) +- README edits/fixes/suggestions 08fe136 (Lauri Apple) + + +## Release 2.18.0 (2019-02-12) + +### Added + +- Added mergeOverwrite function +- cryptographic functions that use secure random (see fe1de12) + +### Changed + +- Improve documentation of regexMatch function, resolves #139 90b89ce (Jan Tagscherer) +- Handle has for nil list 9c10885 (Daniel Cohen) +- Document behaviour of mergeOverwrite fe0dbe9 (Lukas Rieder) +- doc: adds missing documentation. 4b871e6 (Fernandez Ludovic) +- Replace outdated goutils imports 01893d2 (Matthew Lorimor) +- Surface crypto secure random strings from goutils fe1de12 (Matthew Lorimor) +- Handle untyped nil values as paramters to string functions 2b2ec8f (Morten Torkildsen) + +### Fixed + +- Fix dict merge issue and provide mergeOverwrite .dst .src1 to overwrite from src -> dst 4c59c12 (Lukas Rieder) +- Fix substr var names and comments d581f80 (Dean Coakley) +- Fix substr documentation 2737203 (Dean Coakley) + +## Release 2.17.1 (2019-01-03) + +### Fixed + +The 2.17.0 release did not have a version pinned for xstrings, which caused compilation failures when xstrings < 1.2 was used. This adds the correct version string to glide.yaml. + +## Release 2.17.0 (2019-01-03) + +### Added + +- adds alder32sum function and test 6908fc2 (marshallford) +- Added kebabcase function ca331a1 (Ilyes512) + +### Changed + +- Update goutils to 1.1.0 4e1125d (Matt Butcher) + +### Fixed + +- Fix 'has' documentation e3f2a85 (dean-coakley) +- docs(dict): fix typo in pick example dc424f9 (Dustin Specker) +- fixes spelling errors... not sure how that happened 4cf188a (marshallford) + +## Release 2.16.0 (2018-08-13) + +### Added + +- add splitn function fccb0b0 (Helgi Þorbjörnsson) +- Add slice func df28ca7 (gongdo) +- Generate serial number a3bdffd (Cody Coons) +- Extract values of dict with values function df39312 (Lawrence Jones) + +### Changed + +- Modify panic message for list.slice ae38335 (gongdo) +- Minor improvement in code quality - Removed an unreachable piece of code at defaults.go#L26:6 - Resolve formatting issues. 5834241 (Abhishek Kashyap) +- Remove duplicated documentation 1d97af1 (Matthew Fisher) +- Test on go 1.11 49df809 (Helgi Þormar Þorbjörnsson) + +### Fixed + +- Fix file permissions c5f40b5 (gongdo) +- Fix example for buildCustomCert 7779e0d (Tin Lam) + +## Release 2.15.0 (2018-04-02) + +### Added + +- #68 and #69: Add json helpers to docs (thanks @arunvelsriram) +- #66: Add ternary function (thanks @binoculars) +- #67: Allow keys function to take multiple dicts (thanks @binoculars) +- #89: Added sha1sum to crypto function (thanks @benkeil) +- #81: Allow customizing Root CA that used by genSignedCert (thanks @chenzhiwei) +- #92: Add travis testing for go 1.10 +- #93: Adding appveyor config for windows testing + +### Changed + +- #90: Updating to more recent dependencies +- #73: replace satori/go.uuid with google/uuid (thanks @petterw) + +### Fixed + +- #76: Fixed documentation typos (thanks @Thiht) +- Fixed rounding issue on the `ago` function. Note, the removes support for Go 1.8 and older + +## Release 2.14.1 (2017-12-01) + +### Fixed + +- #60: Fix typo in function name documentation (thanks @neil-ca-moore) +- #61: Removing line with {{ due to blocking github pages genertion +- #64: Update the list functions to handle int, string, and other slices for compatibility + +## Release 2.14.0 (2017-10-06) + +This new version of Sprig adds a set of functions for generating and working with SSL certificates. + +- `genCA` generates an SSL Certificate Authority +- `genSelfSignedCert` generates an SSL self-signed certificate +- `genSignedCert` generates an SSL certificate and key based on a given CA + +## Release 2.13.0 (2017-09-18) + +This release adds new functions, including: + +- `regexMatch`, `regexFindAll`, `regexFind`, `regexReplaceAll`, `regexReplaceAllLiteral`, and `regexSplit` to work with regular expressions +- `floor`, `ceil`, and `round` math functions +- `toDate` converts a string to a date +- `nindent` is just like `indent` but also prepends a new line +- `ago` returns the time from `time.Now` + +### Added + +- #40: Added basic regex functionality (thanks @alanquillin) +- #41: Added ceil floor and round functions (thanks @alanquillin) +- #48: Added toDate function (thanks @andreynering) +- #50: Added nindent function (thanks @binoculars) +- #46: Added ago function (thanks @slayer) + +### Changed + +- #51: Updated godocs to include new string functions (thanks @curtisallen) +- #49: Added ability to merge multiple dicts (thanks @binoculars) + +## Release 2.12.0 (2017-05-17) + +- `snakecase`, `camelcase`, and `shuffle` are three new string functions +- `fail` allows you to bail out of a template render when conditions are not met + +## Release 2.11.0 (2017-05-02) + +- Added `toJson` and `toPrettyJson` +- Added `merge` +- Refactored documentation + +## Release 2.10.0 (2017-03-15) + +- Added `semver` and `semverCompare` for Semantic Versions +- `list` replaces `tuple` +- Fixed issue with `join` +- Added `first`, `last`, `intial`, `rest`, `prepend`, `append`, `toString`, `toStrings`, `sortAlpha`, `reverse`, `coalesce`, `pluck`, `pick`, `compact`, `keys`, `omit`, `uniq`, `has`, `without` + +## Release 2.9.0 (2017-02-23) + +- Added `splitList` to split a list +- Added crypto functions of `genPrivateKey` and `derivePassword` + +## Release 2.8.0 (2016-12-21) + +- Added access to several path functions (`base`, `dir`, `clean`, `ext`, and `abs`) +- Added functions for _mutating_ dictionaries (`set`, `unset`, `hasKey`) + +## Release 2.7.0 (2016-12-01) + +- Added `sha256sum` to generate a hash of an input +- Added functions to convert a numeric or string to `int`, `int64`, `float64` + +## Release 2.6.0 (2016-10-03) + +- Added a `uuidv4` template function for generating UUIDs inside of a template. + +## Release 2.5.0 (2016-08-19) + +- New `trimSuffix`, `trimPrefix`, `hasSuffix`, and `hasPrefix` functions +- New aliases have been added for a few functions that didn't follow the naming conventions (`trimAll` and `abbrevBoth`) +- `trimall` and `abbrevboth` (notice the case) are deprecated and will be removed in 3.0.0 + +## Release 2.4.0 (2016-08-16) + +- Adds two functions: `until` and `untilStep` + +## Release 2.3.0 (2016-06-21) + +- cat: Concatenate strings with whitespace separators. +- replace: Replace parts of a string: `replace " " "-" "Me First"` renders "Me-First" +- plural: Format plurals: `len "foo" | plural "one foo" "many foos"` renders "many foos" +- indent: Indent blocks of text in a way that is sensitive to "\n" characters. + +## Release 2.2.0 (2016-04-21) + +- Added a `genPrivateKey` function (Thanks @bacongobbler) + +## Release 2.1.0 (2016-03-30) + +- `default` now prints the default value when it does not receive a value down the pipeline. It is much safer now to do `{{.Foo | default "bar"}}`. +- Added accessors for "hermetic" functions. These return only functions that, when given the same input, produce the same output. + +## Release 2.0.0 (2016-03-29) + +Because we switched from `int` to `int64` as the return value for all integer math functions, the library's major version number has been incremented. + +- `min` complements `max` (formerly `biggest`) +- `empty` indicates that a value is the empty value for its type +- `tuple` creates a tuple inside of a template: `{{$t := tuple "a", "b" "c"}}` +- `dict` creates a dictionary inside of a template `{{$d := dict "key1" "val1" "key2" "val2"}}` +- Date formatters have been added for HTML dates (as used in `date` input fields) +- Integer math functions can convert from a number of types, including `string` (via `strconv.ParseInt`). + +## Release 1.2.0 (2016-02-01) + +- Added quote and squote +- Added b32enc and b32dec +- add now takes varargs +- biggest now takes varargs + +## Release 1.1.0 (2015-12-29) + +- Added #4: Added contains function. strings.Contains, but with the arguments + switched to simplify common pipelines. (thanks krancour) +- Added Travis-CI testing support + +## Release 1.0.0 (2015-12-23) + +- Initial release diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/LICENSE.txt b/backend/vendor/github.com/go-task/slim-sprig/v3/LICENSE.txt new file mode 100644 index 0000000..f311b1e --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/LICENSE.txt @@ -0,0 +1,19 @@ +Copyright (C) 2013-2020 Masterminds + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/README.md b/backend/vendor/github.com/go-task/slim-sprig/v3/README.md new file mode 100644 index 0000000..b5ab564 --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/README.md @@ -0,0 +1,73 @@ +# Slim-Sprig: Template functions for Go templates [![Go Reference](https://pkg.go.dev/badge/github.com/go-task/slim-sprig/v3.svg)](https://pkg.go.dev/github.com/go-task/slim-sprig/v3) + +Slim-Sprig is a fork of [Sprig](https://github.com/Masterminds/sprig), but with +all functions that depend on external (non standard library) or crypto packages +removed. +The reason for this is to make this library more lightweight. Most of these +functions (specially crypto ones) are not needed on most apps, but costs a lot +in terms of binary size and compilation time. + +## Usage + +**Template developers**: Please use Slim-Sprig's [function documentation](https://go-task.github.io/slim-sprig/) for +detailed instructions and code snippets for the >100 template functions available. + +**Go developers**: If you'd like to include Slim-Sprig as a library in your program, +our API documentation is available [at GoDoc.org](http://godoc.org/github.com/go-task/slim-sprig). + +For standard usage, read on. + +### Load the Slim-Sprig library + +To load the Slim-Sprig `FuncMap`: + +```go + +import ( + "html/template" + + "github.com/go-task/slim-sprig" +) + +// This example illustrates that the FuncMap *must* be set before the +// templates themselves are loaded. +tpl := template.Must( + template.New("base").Funcs(sprig.FuncMap()).ParseGlob("*.html") +) +``` + +### Calling the functions inside of templates + +By convention, all functions are lowercase. This seems to follow the Go +idiom for template functions (as opposed to template methods, which are +TitleCase). For example, this: + +``` +{{ "hello!" | upper | repeat 5 }} +``` + +produces this: + +``` +HELLO!HELLO!HELLO!HELLO!HELLO! +``` + +## Principles Driving Our Function Selection + +We followed these principles to decide which functions to add and how to implement them: + +- Use template functions to build layout. The following + types of operations are within the domain of template functions: + - Formatting + - Layout + - Simple type conversions + - Utilities that assist in handling common formatting and layout needs (e.g. arithmetic) +- Template functions should not return errors unless there is no way to print + a sensible value. For example, converting a string to an integer should not + produce an error if conversion fails. Instead, it should display a default + value. +- Simple math is necessary for grid layouts, pagers, and so on. Complex math + (anything other than arithmetic) should be done outside of templates. +- Template functions only deal with the data passed into them. They never retrieve + data from a source. +- Finally, do not override core Go template functions. diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/Taskfile.yml b/backend/vendor/github.com/go-task/slim-sprig/v3/Taskfile.yml new file mode 100644 index 0000000..8e6346b --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/Taskfile.yml @@ -0,0 +1,12 @@ +# https://taskfile.dev + +version: '3' + +tasks: + default: + cmds: + - task: test + + test: + cmds: + - go test -v . diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/crypto.go b/backend/vendor/github.com/go-task/slim-sprig/v3/crypto.go new file mode 100644 index 0000000..d06e516 --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/crypto.go @@ -0,0 +1,24 @@ +package sprig + +import ( + "crypto/sha1" + "crypto/sha256" + "encoding/hex" + "fmt" + "hash/adler32" +) + +func sha256sum(input string) string { + hash := sha256.Sum256([]byte(input)) + return hex.EncodeToString(hash[:]) +} + +func sha1sum(input string) string { + hash := sha1.Sum([]byte(input)) + return hex.EncodeToString(hash[:]) +} + +func adler32sum(input string) string { + hash := adler32.Checksum([]byte(input)) + return fmt.Sprintf("%d", hash) +} diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/date.go b/backend/vendor/github.com/go-task/slim-sprig/v3/date.go new file mode 100644 index 0000000..ed022dd --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/date.go @@ -0,0 +1,152 @@ +package sprig + +import ( + "strconv" + "time" +) + +// Given a format and a date, format the date string. +// +// Date can be a `time.Time` or an `int, int32, int64`. +// In the later case, it is treated as seconds since UNIX +// epoch. +func date(fmt string, date interface{}) string { + return dateInZone(fmt, date, "Local") +} + +func htmlDate(date interface{}) string { + return dateInZone("2006-01-02", date, "Local") +} + +func htmlDateInZone(date interface{}, zone string) string { + return dateInZone("2006-01-02", date, zone) +} + +func dateInZone(fmt string, date interface{}, zone string) string { + var t time.Time + switch date := date.(type) { + default: + t = time.Now() + case time.Time: + t = date + case *time.Time: + t = *date + case int64: + t = time.Unix(date, 0) + case int: + t = time.Unix(int64(date), 0) + case int32: + t = time.Unix(int64(date), 0) + } + + loc, err := time.LoadLocation(zone) + if err != nil { + loc, _ = time.LoadLocation("UTC") + } + + return t.In(loc).Format(fmt) +} + +func dateModify(fmt string, date time.Time) time.Time { + d, err := time.ParseDuration(fmt) + if err != nil { + return date + } + return date.Add(d) +} + +func mustDateModify(fmt string, date time.Time) (time.Time, error) { + d, err := time.ParseDuration(fmt) + if err != nil { + return time.Time{}, err + } + return date.Add(d), nil +} + +func dateAgo(date interface{}) string { + var t time.Time + + switch date := date.(type) { + default: + t = time.Now() + case time.Time: + t = date + case int64: + t = time.Unix(date, 0) + case int: + t = time.Unix(int64(date), 0) + } + // Drop resolution to seconds + duration := time.Since(t).Round(time.Second) + return duration.String() +} + +func duration(sec interface{}) string { + var n int64 + switch value := sec.(type) { + default: + n = 0 + case string: + n, _ = strconv.ParseInt(value, 10, 64) + case int64: + n = value + } + return (time.Duration(n) * time.Second).String() +} + +func durationRound(duration interface{}) string { + var d time.Duration + switch duration := duration.(type) { + default: + d = 0 + case string: + d, _ = time.ParseDuration(duration) + case int64: + d = time.Duration(duration) + case time.Time: + d = time.Since(duration) + } + + u := uint64(d) + neg := d < 0 + if neg { + u = -u + } + + var ( + year = uint64(time.Hour) * 24 * 365 + month = uint64(time.Hour) * 24 * 30 + day = uint64(time.Hour) * 24 + hour = uint64(time.Hour) + minute = uint64(time.Minute) + second = uint64(time.Second) + ) + switch { + case u > year: + return strconv.FormatUint(u/year, 10) + "y" + case u > month: + return strconv.FormatUint(u/month, 10) + "mo" + case u > day: + return strconv.FormatUint(u/day, 10) + "d" + case u > hour: + return strconv.FormatUint(u/hour, 10) + "h" + case u > minute: + return strconv.FormatUint(u/minute, 10) + "m" + case u > second: + return strconv.FormatUint(u/second, 10) + "s" + } + return "0s" +} + +func toDate(fmt, str string) time.Time { + t, _ := time.ParseInLocation(fmt, str, time.Local) + return t +} + +func mustToDate(fmt, str string) (time.Time, error) { + return time.ParseInLocation(fmt, str, time.Local) +} + +func unixEpoch(date time.Time) string { + return strconv.FormatInt(date.Unix(), 10) +} diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/defaults.go b/backend/vendor/github.com/go-task/slim-sprig/v3/defaults.go new file mode 100644 index 0000000..b9f9796 --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/defaults.go @@ -0,0 +1,163 @@ +package sprig + +import ( + "bytes" + "encoding/json" + "math/rand" + "reflect" + "strings" + "time" +) + +func init() { + rand.Seed(time.Now().UnixNano()) +} + +// dfault checks whether `given` is set, and returns default if not set. +// +// This returns `d` if `given` appears not to be set, and `given` otherwise. +// +// For numeric types 0 is unset. +// For strings, maps, arrays, and slices, len() = 0 is considered unset. +// For bool, false is unset. +// Structs are never considered unset. +// +// For everything else, including pointers, a nil value is unset. +func dfault(d interface{}, given ...interface{}) interface{} { + + if empty(given) || empty(given[0]) { + return d + } + return given[0] +} + +// empty returns true if the given value has the zero value for its type. +func empty(given interface{}) bool { + g := reflect.ValueOf(given) + if !g.IsValid() { + return true + } + + // Basically adapted from text/template.isTrue + switch g.Kind() { + default: + return g.IsNil() + case reflect.Array, reflect.Slice, reflect.Map, reflect.String: + return g.Len() == 0 + case reflect.Bool: + return !g.Bool() + case reflect.Complex64, reflect.Complex128: + return g.Complex() == 0 + case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: + return g.Int() == 0 + case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr: + return g.Uint() == 0 + case reflect.Float32, reflect.Float64: + return g.Float() == 0 + case reflect.Struct: + return false + } +} + +// coalesce returns the first non-empty value. +func coalesce(v ...interface{}) interface{} { + for _, val := range v { + if !empty(val) { + return val + } + } + return nil +} + +// all returns true if empty(x) is false for all values x in the list. +// If the list is empty, return true. +func all(v ...interface{}) bool { + for _, val := range v { + if empty(val) { + return false + } + } + return true +} + +// any returns true if empty(x) is false for any x in the list. +// If the list is empty, return false. +func any(v ...interface{}) bool { + for _, val := range v { + if !empty(val) { + return true + } + } + return false +} + +// fromJson decodes JSON into a structured value, ignoring errors. +func fromJson(v string) interface{} { + output, _ := mustFromJson(v) + return output +} + +// mustFromJson decodes JSON into a structured value, returning errors. +func mustFromJson(v string) (interface{}, error) { + var output interface{} + err := json.Unmarshal([]byte(v), &output) + return output, err +} + +// toJson encodes an item into a JSON string +func toJson(v interface{}) string { + output, _ := json.Marshal(v) + return string(output) +} + +func mustToJson(v interface{}) (string, error) { + output, err := json.Marshal(v) + if err != nil { + return "", err + } + return string(output), nil +} + +// toPrettyJson encodes an item into a pretty (indented) JSON string +func toPrettyJson(v interface{}) string { + output, _ := json.MarshalIndent(v, "", " ") + return string(output) +} + +func mustToPrettyJson(v interface{}) (string, error) { + output, err := json.MarshalIndent(v, "", " ") + if err != nil { + return "", err + } + return string(output), nil +} + +// toRawJson encodes an item into a JSON string with no escaping of HTML characters. +func toRawJson(v interface{}) string { + output, err := mustToRawJson(v) + if err != nil { + panic(err) + } + return string(output) +} + +// mustToRawJson encodes an item into a JSON string with no escaping of HTML characters. +func mustToRawJson(v interface{}) (string, error) { + buf := new(bytes.Buffer) + enc := json.NewEncoder(buf) + enc.SetEscapeHTML(false) + err := enc.Encode(&v) + if err != nil { + return "", err + } + return strings.TrimSuffix(buf.String(), "\n"), nil +} + +// ternary returns the first value if the last value is true, otherwise returns the second value. +func ternary(vt interface{}, vf interface{}, v bool) interface{} { + if v { + return vt + } + + return vf +} diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/dict.go b/backend/vendor/github.com/go-task/slim-sprig/v3/dict.go new file mode 100644 index 0000000..77ebc61 --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/dict.go @@ -0,0 +1,118 @@ +package sprig + +func get(d map[string]interface{}, key string) interface{} { + if val, ok := d[key]; ok { + return val + } + return "" +} + +func set(d map[string]interface{}, key string, value interface{}) map[string]interface{} { + d[key] = value + return d +} + +func unset(d map[string]interface{}, key string) map[string]interface{} { + delete(d, key) + return d +} + +func hasKey(d map[string]interface{}, key string) bool { + _, ok := d[key] + return ok +} + +func pluck(key string, d ...map[string]interface{}) []interface{} { + res := []interface{}{} + for _, dict := range d { + if val, ok := dict[key]; ok { + res = append(res, val) + } + } + return res +} + +func keys(dicts ...map[string]interface{}) []string { + k := []string{} + for _, dict := range dicts { + for key := range dict { + k = append(k, key) + } + } + return k +} + +func pick(dict map[string]interface{}, keys ...string) map[string]interface{} { + res := map[string]interface{}{} + for _, k := range keys { + if v, ok := dict[k]; ok { + res[k] = v + } + } + return res +} + +func omit(dict map[string]interface{}, keys ...string) map[string]interface{} { + res := map[string]interface{}{} + + omit := make(map[string]bool, len(keys)) + for _, k := range keys { + omit[k] = true + } + + for k, v := range dict { + if _, ok := omit[k]; !ok { + res[k] = v + } + } + return res +} + +func dict(v ...interface{}) map[string]interface{} { + dict := map[string]interface{}{} + lenv := len(v) + for i := 0; i < lenv; i += 2 { + key := strval(v[i]) + if i+1 >= lenv { + dict[key] = "" + continue + } + dict[key] = v[i+1] + } + return dict +} + +func values(dict map[string]interface{}) []interface{} { + values := []interface{}{} + for _, value := range dict { + values = append(values, value) + } + + return values +} + +func dig(ps ...interface{}) (interface{}, error) { + if len(ps) < 3 { + panic("dig needs at least three arguments") + } + dict := ps[len(ps)-1].(map[string]interface{}) + def := ps[len(ps)-2] + ks := make([]string, len(ps)-2) + for i := 0; i < len(ks); i++ { + ks[i] = ps[i].(string) + } + + return digFromDict(dict, def, ks) +} + +func digFromDict(dict map[string]interface{}, d interface{}, ks []string) (interface{}, error) { + k, ns := ks[0], ks[1:len(ks)] + step, has := dict[k] + if !has { + return d, nil + } + if len(ns) == 0 { + return step, nil + } + return digFromDict(step.(map[string]interface{}), d, ns) +} diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/doc.go b/backend/vendor/github.com/go-task/slim-sprig/v3/doc.go new file mode 100644 index 0000000..aabb9d4 --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/doc.go @@ -0,0 +1,19 @@ +/* +Package sprig provides template functions for Go. + +This package contains a number of utility functions for working with data +inside of Go `html/template` and `text/template` files. + +To add these functions, use the `template.Funcs()` method: + + t := templates.New("foo").Funcs(sprig.FuncMap()) + +Note that you should add the function map before you parse any template files. + + In several cases, Sprig reverses the order of arguments from the way they + appear in the standard library. This is to make it easier to pipe + arguments into functions. + +See http://masterminds.github.io/sprig/ for more detailed documentation on each of the available functions. +*/ +package sprig diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/functions.go b/backend/vendor/github.com/go-task/slim-sprig/v3/functions.go new file mode 100644 index 0000000..5ea74f8 --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/functions.go @@ -0,0 +1,317 @@ +package sprig + +import ( + "errors" + "html/template" + "math/rand" + "os" + "path" + "path/filepath" + "reflect" + "strconv" + "strings" + ttemplate "text/template" + "time" +) + +// FuncMap produces the function map. +// +// Use this to pass the functions into the template engine: +// +// tpl := template.New("foo").Funcs(sprig.FuncMap())) +// +func FuncMap() template.FuncMap { + return HtmlFuncMap() +} + +// HermeticTxtFuncMap returns a 'text/template'.FuncMap with only repeatable functions. +func HermeticTxtFuncMap() ttemplate.FuncMap { + r := TxtFuncMap() + for _, name := range nonhermeticFunctions { + delete(r, name) + } + return r +} + +// HermeticHtmlFuncMap returns an 'html/template'.Funcmap with only repeatable functions. +func HermeticHtmlFuncMap() template.FuncMap { + r := HtmlFuncMap() + for _, name := range nonhermeticFunctions { + delete(r, name) + } + return r +} + +// TxtFuncMap returns a 'text/template'.FuncMap +func TxtFuncMap() ttemplate.FuncMap { + return ttemplate.FuncMap(GenericFuncMap()) +} + +// HtmlFuncMap returns an 'html/template'.Funcmap +func HtmlFuncMap() template.FuncMap { + return template.FuncMap(GenericFuncMap()) +} + +// GenericFuncMap returns a copy of the basic function map as a map[string]interface{}. +func GenericFuncMap() map[string]interface{} { + gfm := make(map[string]interface{}, len(genericMap)) + for k, v := range genericMap { + gfm[k] = v + } + return gfm +} + +// These functions are not guaranteed to evaluate to the same result for given input, because they +// refer to the environment or global state. +var nonhermeticFunctions = []string{ + // Date functions + "date", + "date_in_zone", + "date_modify", + "now", + "htmlDate", + "htmlDateInZone", + "dateInZone", + "dateModify", + + // Strings + "randAlphaNum", + "randAlpha", + "randAscii", + "randNumeric", + "randBytes", + "uuidv4", + + // OS + "env", + "expandenv", + + // Network + "getHostByName", +} + +var genericMap = map[string]interface{}{ + "hello": func() string { return "Hello!" }, + + // Date functions + "ago": dateAgo, + "date": date, + "date_in_zone": dateInZone, + "date_modify": dateModify, + "dateInZone": dateInZone, + "dateModify": dateModify, + "duration": duration, + "durationRound": durationRound, + "htmlDate": htmlDate, + "htmlDateInZone": htmlDateInZone, + "must_date_modify": mustDateModify, + "mustDateModify": mustDateModify, + "mustToDate": mustToDate, + "now": time.Now, + "toDate": toDate, + "unixEpoch": unixEpoch, + + // Strings + "trunc": trunc, + "trim": strings.TrimSpace, + "upper": strings.ToUpper, + "lower": strings.ToLower, + "title": strings.Title, + "substr": substring, + // Switch order so that "foo" | repeat 5 + "repeat": func(count int, str string) string { return strings.Repeat(str, count) }, + // Deprecated: Use trimAll. + "trimall": func(a, b string) string { return strings.Trim(b, a) }, + // Switch order so that "$foo" | trimall "$" + "trimAll": func(a, b string) string { return strings.Trim(b, a) }, + "trimSuffix": func(a, b string) string { return strings.TrimSuffix(b, a) }, + "trimPrefix": func(a, b string) string { return strings.TrimPrefix(b, a) }, + // Switch order so that "foobar" | contains "foo" + "contains": func(substr string, str string) bool { return strings.Contains(str, substr) }, + "hasPrefix": func(substr string, str string) bool { return strings.HasPrefix(str, substr) }, + "hasSuffix": func(substr string, str string) bool { return strings.HasSuffix(str, substr) }, + "quote": quote, + "squote": squote, + "cat": cat, + "indent": indent, + "nindent": nindent, + "replace": replace, + "plural": plural, + "sha1sum": sha1sum, + "sha256sum": sha256sum, + "adler32sum": adler32sum, + "toString": strval, + + // Wrap Atoi to stop errors. + "atoi": func(a string) int { i, _ := strconv.Atoi(a); return i }, + "int64": toInt64, + "int": toInt, + "float64": toFloat64, + "seq": seq, + "toDecimal": toDecimal, + + //"gt": func(a, b int) bool {return a > b}, + //"gte": func(a, b int) bool {return a >= b}, + //"lt": func(a, b int) bool {return a < b}, + //"lte": func(a, b int) bool {return a <= b}, + + // split "/" foo/bar returns map[int]string{0: foo, 1: bar} + "split": split, + "splitList": func(sep, orig string) []string { return strings.Split(orig, sep) }, + // splitn "/" foo/bar/fuu returns map[int]string{0: foo, 1: bar/fuu} + "splitn": splitn, + "toStrings": strslice, + + "until": until, + "untilStep": untilStep, + + // VERY basic arithmetic. + "add1": func(i interface{}) int64 { return toInt64(i) + 1 }, + "add": func(i ...interface{}) int64 { + var a int64 = 0 + for _, b := range i { + a += toInt64(b) + } + return a + }, + "sub": func(a, b interface{}) int64 { return toInt64(a) - toInt64(b) }, + "div": func(a, b interface{}) int64 { return toInt64(a) / toInt64(b) }, + "mod": func(a, b interface{}) int64 { return toInt64(a) % toInt64(b) }, + "mul": func(a interface{}, v ...interface{}) int64 { + val := toInt64(a) + for _, b := range v { + val = val * toInt64(b) + } + return val + }, + "randInt": func(min, max int) int { return rand.Intn(max-min) + min }, + "biggest": max, + "max": max, + "min": min, + "maxf": maxf, + "minf": minf, + "ceil": ceil, + "floor": floor, + "round": round, + + // string slices. Note that we reverse the order b/c that's better + // for template processing. + "join": join, + "sortAlpha": sortAlpha, + + // Defaults + "default": dfault, + "empty": empty, + "coalesce": coalesce, + "all": all, + "any": any, + "compact": compact, + "mustCompact": mustCompact, + "fromJson": fromJson, + "toJson": toJson, + "toPrettyJson": toPrettyJson, + "toRawJson": toRawJson, + "mustFromJson": mustFromJson, + "mustToJson": mustToJson, + "mustToPrettyJson": mustToPrettyJson, + "mustToRawJson": mustToRawJson, + "ternary": ternary, + + // Reflection + "typeOf": typeOf, + "typeIs": typeIs, + "typeIsLike": typeIsLike, + "kindOf": kindOf, + "kindIs": kindIs, + "deepEqual": reflect.DeepEqual, + + // OS: + "env": os.Getenv, + "expandenv": os.ExpandEnv, + + // Network: + "getHostByName": getHostByName, + + // Paths: + "base": path.Base, + "dir": path.Dir, + "clean": path.Clean, + "ext": path.Ext, + "isAbs": path.IsAbs, + + // Filepaths: + "osBase": filepath.Base, + "osClean": filepath.Clean, + "osDir": filepath.Dir, + "osExt": filepath.Ext, + "osIsAbs": filepath.IsAbs, + + // Encoding: + "b64enc": base64encode, + "b64dec": base64decode, + "b32enc": base32encode, + "b32dec": base32decode, + + // Data Structures: + "tuple": list, // FIXME: with the addition of append/prepend these are no longer immutable. + "list": list, + "dict": dict, + "get": get, + "set": set, + "unset": unset, + "hasKey": hasKey, + "pluck": pluck, + "keys": keys, + "pick": pick, + "omit": omit, + "values": values, + + "append": push, "push": push, + "mustAppend": mustPush, "mustPush": mustPush, + "prepend": prepend, + "mustPrepend": mustPrepend, + "first": first, + "mustFirst": mustFirst, + "rest": rest, + "mustRest": mustRest, + "last": last, + "mustLast": mustLast, + "initial": initial, + "mustInitial": mustInitial, + "reverse": reverse, + "mustReverse": mustReverse, + "uniq": uniq, + "mustUniq": mustUniq, + "without": without, + "mustWithout": mustWithout, + "has": has, + "mustHas": mustHas, + "slice": slice, + "mustSlice": mustSlice, + "concat": concat, + "dig": dig, + "chunk": chunk, + "mustChunk": mustChunk, + + // Flow Control: + "fail": func(msg string) (string, error) { return "", errors.New(msg) }, + + // Regex + "regexMatch": regexMatch, + "mustRegexMatch": mustRegexMatch, + "regexFindAll": regexFindAll, + "mustRegexFindAll": mustRegexFindAll, + "regexFind": regexFind, + "mustRegexFind": mustRegexFind, + "regexReplaceAll": regexReplaceAll, + "mustRegexReplaceAll": mustRegexReplaceAll, + "regexReplaceAllLiteral": regexReplaceAllLiteral, + "mustRegexReplaceAllLiteral": mustRegexReplaceAllLiteral, + "regexSplit": regexSplit, + "mustRegexSplit": mustRegexSplit, + "regexQuoteMeta": regexQuoteMeta, + + // URLs: + "urlParse": urlParse, + "urlJoin": urlJoin, +} diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/list.go b/backend/vendor/github.com/go-task/slim-sprig/v3/list.go new file mode 100644 index 0000000..ca0fbb7 --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/list.go @@ -0,0 +1,464 @@ +package sprig + +import ( + "fmt" + "math" + "reflect" + "sort" +) + +// Reflection is used in these functions so that slices and arrays of strings, +// ints, and other types not implementing []interface{} can be worked with. +// For example, this is useful if you need to work on the output of regexs. + +func list(v ...interface{}) []interface{} { + return v +} + +func push(list interface{}, v interface{}) []interface{} { + l, err := mustPush(list, v) + if err != nil { + panic(err) + } + + return l +} + +func mustPush(list interface{}, v interface{}) ([]interface{}, error) { + tp := reflect.TypeOf(list).Kind() + switch tp { + case reflect.Slice, reflect.Array: + l2 := reflect.ValueOf(list) + + l := l2.Len() + nl := make([]interface{}, l) + for i := 0; i < l; i++ { + nl[i] = l2.Index(i).Interface() + } + + return append(nl, v), nil + + default: + return nil, fmt.Errorf("Cannot push on type %s", tp) + } +} + +func prepend(list interface{}, v interface{}) []interface{} { + l, err := mustPrepend(list, v) + if err != nil { + panic(err) + } + + return l +} + +func mustPrepend(list interface{}, v interface{}) ([]interface{}, error) { + //return append([]interface{}{v}, list...) + + tp := reflect.TypeOf(list).Kind() + switch tp { + case reflect.Slice, reflect.Array: + l2 := reflect.ValueOf(list) + + l := l2.Len() + nl := make([]interface{}, l) + for i := 0; i < l; i++ { + nl[i] = l2.Index(i).Interface() + } + + return append([]interface{}{v}, nl...), nil + + default: + return nil, fmt.Errorf("Cannot prepend on type %s", tp) + } +} + +func chunk(size int, list interface{}) [][]interface{} { + l, err := mustChunk(size, list) + if err != nil { + panic(err) + } + + return l +} + +func mustChunk(size int, list interface{}) ([][]interface{}, error) { + tp := reflect.TypeOf(list).Kind() + switch tp { + case reflect.Slice, reflect.Array: + l2 := reflect.ValueOf(list) + + l := l2.Len() + + cs := int(math.Floor(float64(l-1)/float64(size)) + 1) + nl := make([][]interface{}, cs) + + for i := 0; i < cs; i++ { + clen := size + if i == cs-1 { + clen = int(math.Floor(math.Mod(float64(l), float64(size)))) + if clen == 0 { + clen = size + } + } + + nl[i] = make([]interface{}, clen) + + for j := 0; j < clen; j++ { + ix := i*size + j + nl[i][j] = l2.Index(ix).Interface() + } + } + + return nl, nil + + default: + return nil, fmt.Errorf("Cannot chunk type %s", tp) + } +} + +func last(list interface{}) interface{} { + l, err := mustLast(list) + if err != nil { + panic(err) + } + + return l +} + +func mustLast(list interface{}) (interface{}, error) { + tp := reflect.TypeOf(list).Kind() + switch tp { + case reflect.Slice, reflect.Array: + l2 := reflect.ValueOf(list) + + l := l2.Len() + if l == 0 { + return nil, nil + } + + return l2.Index(l - 1).Interface(), nil + default: + return nil, fmt.Errorf("Cannot find last on type %s", tp) + } +} + +func first(list interface{}) interface{} { + l, err := mustFirst(list) + if err != nil { + panic(err) + } + + return l +} + +func mustFirst(list interface{}) (interface{}, error) { + tp := reflect.TypeOf(list).Kind() + switch tp { + case reflect.Slice, reflect.Array: + l2 := reflect.ValueOf(list) + + l := l2.Len() + if l == 0 { + return nil, nil + } + + return l2.Index(0).Interface(), nil + default: + return nil, fmt.Errorf("Cannot find first on type %s", tp) + } +} + +func rest(list interface{}) []interface{} { + l, err := mustRest(list) + if err != nil { + panic(err) + } + + return l +} + +func mustRest(list interface{}) ([]interface{}, error) { + tp := reflect.TypeOf(list).Kind() + switch tp { + case reflect.Slice, reflect.Array: + l2 := reflect.ValueOf(list) + + l := l2.Len() + if l == 0 { + return nil, nil + } + + nl := make([]interface{}, l-1) + for i := 1; i < l; i++ { + nl[i-1] = l2.Index(i).Interface() + } + + return nl, nil + default: + return nil, fmt.Errorf("Cannot find rest on type %s", tp) + } +} + +func initial(list interface{}) []interface{} { + l, err := mustInitial(list) + if err != nil { + panic(err) + } + + return l +} + +func mustInitial(list interface{}) ([]interface{}, error) { + tp := reflect.TypeOf(list).Kind() + switch tp { + case reflect.Slice, reflect.Array: + l2 := reflect.ValueOf(list) + + l := l2.Len() + if l == 0 { + return nil, nil + } + + nl := make([]interface{}, l-1) + for i := 0; i < l-1; i++ { + nl[i] = l2.Index(i).Interface() + } + + return nl, nil + default: + return nil, fmt.Errorf("Cannot find initial on type %s", tp) + } +} + +func sortAlpha(list interface{}) []string { + k := reflect.Indirect(reflect.ValueOf(list)).Kind() + switch k { + case reflect.Slice, reflect.Array: + a := strslice(list) + s := sort.StringSlice(a) + s.Sort() + return s + } + return []string{strval(list)} +} + +func reverse(v interface{}) []interface{} { + l, err := mustReverse(v) + if err != nil { + panic(err) + } + + return l +} + +func mustReverse(v interface{}) ([]interface{}, error) { + tp := reflect.TypeOf(v).Kind() + switch tp { + case reflect.Slice, reflect.Array: + l2 := reflect.ValueOf(v) + + l := l2.Len() + // We do not sort in place because the incoming array should not be altered. + nl := make([]interface{}, l) + for i := 0; i < l; i++ { + nl[l-i-1] = l2.Index(i).Interface() + } + + return nl, nil + default: + return nil, fmt.Errorf("Cannot find reverse on type %s", tp) + } +} + +func compact(list interface{}) []interface{} { + l, err := mustCompact(list) + if err != nil { + panic(err) + } + + return l +} + +func mustCompact(list interface{}) ([]interface{}, error) { + tp := reflect.TypeOf(list).Kind() + switch tp { + case reflect.Slice, reflect.Array: + l2 := reflect.ValueOf(list) + + l := l2.Len() + nl := []interface{}{} + var item interface{} + for i := 0; i < l; i++ { + item = l2.Index(i).Interface() + if !empty(item) { + nl = append(nl, item) + } + } + + return nl, nil + default: + return nil, fmt.Errorf("Cannot compact on type %s", tp) + } +} + +func uniq(list interface{}) []interface{} { + l, err := mustUniq(list) + if err != nil { + panic(err) + } + + return l +} + +func mustUniq(list interface{}) ([]interface{}, error) { + tp := reflect.TypeOf(list).Kind() + switch tp { + case reflect.Slice, reflect.Array: + l2 := reflect.ValueOf(list) + + l := l2.Len() + dest := []interface{}{} + var item interface{} + for i := 0; i < l; i++ { + item = l2.Index(i).Interface() + if !inList(dest, item) { + dest = append(dest, item) + } + } + + return dest, nil + default: + return nil, fmt.Errorf("Cannot find uniq on type %s", tp) + } +} + +func inList(haystack []interface{}, needle interface{}) bool { + for _, h := range haystack { + if reflect.DeepEqual(needle, h) { + return true + } + } + return false +} + +func without(list interface{}, omit ...interface{}) []interface{} { + l, err := mustWithout(list, omit...) + if err != nil { + panic(err) + } + + return l +} + +func mustWithout(list interface{}, omit ...interface{}) ([]interface{}, error) { + tp := reflect.TypeOf(list).Kind() + switch tp { + case reflect.Slice, reflect.Array: + l2 := reflect.ValueOf(list) + + l := l2.Len() + res := []interface{}{} + var item interface{} + for i := 0; i < l; i++ { + item = l2.Index(i).Interface() + if !inList(omit, item) { + res = append(res, item) + } + } + + return res, nil + default: + return nil, fmt.Errorf("Cannot find without on type %s", tp) + } +} + +func has(needle interface{}, haystack interface{}) bool { + l, err := mustHas(needle, haystack) + if err != nil { + panic(err) + } + + return l +} + +func mustHas(needle interface{}, haystack interface{}) (bool, error) { + if haystack == nil { + return false, nil + } + tp := reflect.TypeOf(haystack).Kind() + switch tp { + case reflect.Slice, reflect.Array: + l2 := reflect.ValueOf(haystack) + var item interface{} + l := l2.Len() + for i := 0; i < l; i++ { + item = l2.Index(i).Interface() + if reflect.DeepEqual(needle, item) { + return true, nil + } + } + + return false, nil + default: + return false, fmt.Errorf("Cannot find has on type %s", tp) + } +} + +// $list := [1, 2, 3, 4, 5] +// slice $list -> list[0:5] = list[:] +// slice $list 0 3 -> list[0:3] = list[:3] +// slice $list 3 5 -> list[3:5] +// slice $list 3 -> list[3:5] = list[3:] +func slice(list interface{}, indices ...interface{}) interface{} { + l, err := mustSlice(list, indices...) + if err != nil { + panic(err) + } + + return l +} + +func mustSlice(list interface{}, indices ...interface{}) (interface{}, error) { + tp := reflect.TypeOf(list).Kind() + switch tp { + case reflect.Slice, reflect.Array: + l2 := reflect.ValueOf(list) + + l := l2.Len() + if l == 0 { + return nil, nil + } + + var start, end int + if len(indices) > 0 { + start = toInt(indices[0]) + } + if len(indices) < 2 { + end = l + } else { + end = toInt(indices[1]) + } + + return l2.Slice(start, end).Interface(), nil + default: + return nil, fmt.Errorf("list should be type of slice or array but %s", tp) + } +} + +func concat(lists ...interface{}) interface{} { + var res []interface{} + for _, list := range lists { + tp := reflect.TypeOf(list).Kind() + switch tp { + case reflect.Slice, reflect.Array: + l2 := reflect.ValueOf(list) + for i := 0; i < l2.Len(); i++ { + res = append(res, l2.Index(i).Interface()) + } + default: + panic(fmt.Sprintf("Cannot concat type %s as list", tp)) + } + } + return res +} diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/network.go b/backend/vendor/github.com/go-task/slim-sprig/v3/network.go new file mode 100644 index 0000000..108d78a --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/network.go @@ -0,0 +1,12 @@ +package sprig + +import ( + "math/rand" + "net" +) + +func getHostByName(name string) string { + addrs, _ := net.LookupHost(name) + //TODO: add error handing when release v3 comes out + return addrs[rand.Intn(len(addrs))] +} diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/numeric.go b/backend/vendor/github.com/go-task/slim-sprig/v3/numeric.go new file mode 100644 index 0000000..98cbb37 --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/numeric.go @@ -0,0 +1,228 @@ +package sprig + +import ( + "fmt" + "math" + "reflect" + "strconv" + "strings" +) + +// toFloat64 converts 64-bit floats +func toFloat64(v interface{}) float64 { + if str, ok := v.(string); ok { + iv, err := strconv.ParseFloat(str, 64) + if err != nil { + return 0 + } + return iv + } + + val := reflect.Indirect(reflect.ValueOf(v)) + switch val.Kind() { + case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int: + return float64(val.Int()) + case reflect.Uint8, reflect.Uint16, reflect.Uint32: + return float64(val.Uint()) + case reflect.Uint, reflect.Uint64: + return float64(val.Uint()) + case reflect.Float32, reflect.Float64: + return val.Float() + case reflect.Bool: + if val.Bool() { + return 1 + } + return 0 + default: + return 0 + } +} + +func toInt(v interface{}) int { + //It's not optimal. Bud I don't want duplicate toInt64 code. + return int(toInt64(v)) +} + +// toInt64 converts integer types to 64-bit integers +func toInt64(v interface{}) int64 { + if str, ok := v.(string); ok { + iv, err := strconv.ParseInt(str, 10, 64) + if err != nil { + return 0 + } + return iv + } + + val := reflect.Indirect(reflect.ValueOf(v)) + switch val.Kind() { + case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int: + return val.Int() + case reflect.Uint8, reflect.Uint16, reflect.Uint32: + return int64(val.Uint()) + case reflect.Uint, reflect.Uint64: + tv := val.Uint() + if tv <= math.MaxInt64 { + return int64(tv) + } + // TODO: What is the sensible thing to do here? + return math.MaxInt64 + case reflect.Float32, reflect.Float64: + return int64(val.Float()) + case reflect.Bool: + if val.Bool() { + return 1 + } + return 0 + default: + return 0 + } +} + +func max(a interface{}, i ...interface{}) int64 { + aa := toInt64(a) + for _, b := range i { + bb := toInt64(b) + if bb > aa { + aa = bb + } + } + return aa +} + +func maxf(a interface{}, i ...interface{}) float64 { + aa := toFloat64(a) + for _, b := range i { + bb := toFloat64(b) + aa = math.Max(aa, bb) + } + return aa +} + +func min(a interface{}, i ...interface{}) int64 { + aa := toInt64(a) + for _, b := range i { + bb := toInt64(b) + if bb < aa { + aa = bb + } + } + return aa +} + +func minf(a interface{}, i ...interface{}) float64 { + aa := toFloat64(a) + for _, b := range i { + bb := toFloat64(b) + aa = math.Min(aa, bb) + } + return aa +} + +func until(count int) []int { + step := 1 + if count < 0 { + step = -1 + } + return untilStep(0, count, step) +} + +func untilStep(start, stop, step int) []int { + v := []int{} + + if stop < start { + if step >= 0 { + return v + } + for i := start; i > stop; i += step { + v = append(v, i) + } + return v + } + + if step <= 0 { + return v + } + for i := start; i < stop; i += step { + v = append(v, i) + } + return v +} + +func floor(a interface{}) float64 { + aa := toFloat64(a) + return math.Floor(aa) +} + +func ceil(a interface{}) float64 { + aa := toFloat64(a) + return math.Ceil(aa) +} + +func round(a interface{}, p int, rOpt ...float64) float64 { + roundOn := .5 + if len(rOpt) > 0 { + roundOn = rOpt[0] + } + val := toFloat64(a) + places := toFloat64(p) + + var round float64 + pow := math.Pow(10, places) + digit := pow * val + _, div := math.Modf(digit) + if div >= roundOn { + round = math.Ceil(digit) + } else { + round = math.Floor(digit) + } + return round / pow +} + +// converts unix octal to decimal +func toDecimal(v interface{}) int64 { + result, err := strconv.ParseInt(fmt.Sprint(v), 8, 64) + if err != nil { + return 0 + } + return result +} + +func seq(params ...int) string { + increment := 1 + switch len(params) { + case 0: + return "" + case 1: + start := 1 + end := params[0] + if end < start { + increment = -1 + } + return intArrayToString(untilStep(start, end+increment, increment), " ") + case 3: + start := params[0] + end := params[2] + step := params[1] + if end < start { + increment = -1 + if step > 0 { + return "" + } + } + return intArrayToString(untilStep(start, end+increment, step), " ") + case 2: + start := params[0] + end := params[1] + step := 1 + if end < start { + step = -1 + } + return intArrayToString(untilStep(start, end+step, step), " ") + default: + return "" + } +} + +func intArrayToString(slice []int, delimeter string) string { + return strings.Trim(strings.Join(strings.Fields(fmt.Sprint(slice)), delimeter), "[]") +} diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/reflect.go b/backend/vendor/github.com/go-task/slim-sprig/v3/reflect.go new file mode 100644 index 0000000..8a65c13 --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/reflect.go @@ -0,0 +1,28 @@ +package sprig + +import ( + "fmt" + "reflect" +) + +// typeIs returns true if the src is the type named in target. +func typeIs(target string, src interface{}) bool { + return target == typeOf(src) +} + +func typeIsLike(target string, src interface{}) bool { + t := typeOf(src) + return target == t || "*"+target == t +} + +func typeOf(src interface{}) string { + return fmt.Sprintf("%T", src) +} + +func kindIs(target string, src interface{}) bool { + return target == kindOf(src) +} + +func kindOf(src interface{}) string { + return reflect.ValueOf(src).Kind().String() +} diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/regex.go b/backend/vendor/github.com/go-task/slim-sprig/v3/regex.go new file mode 100644 index 0000000..fab5510 --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/regex.go @@ -0,0 +1,83 @@ +package sprig + +import ( + "regexp" +) + +func regexMatch(regex string, s string) bool { + match, _ := regexp.MatchString(regex, s) + return match +} + +func mustRegexMatch(regex string, s string) (bool, error) { + return regexp.MatchString(regex, s) +} + +func regexFindAll(regex string, s string, n int) []string { + r := regexp.MustCompile(regex) + return r.FindAllString(s, n) +} + +func mustRegexFindAll(regex string, s string, n int) ([]string, error) { + r, err := regexp.Compile(regex) + if err != nil { + return []string{}, err + } + return r.FindAllString(s, n), nil +} + +func regexFind(regex string, s string) string { + r := regexp.MustCompile(regex) + return r.FindString(s) +} + +func mustRegexFind(regex string, s string) (string, error) { + r, err := regexp.Compile(regex) + if err != nil { + return "", err + } + return r.FindString(s), nil +} + +func regexReplaceAll(regex string, s string, repl string) string { + r := regexp.MustCompile(regex) + return r.ReplaceAllString(s, repl) +} + +func mustRegexReplaceAll(regex string, s string, repl string) (string, error) { + r, err := regexp.Compile(regex) + if err != nil { + return "", err + } + return r.ReplaceAllString(s, repl), nil +} + +func regexReplaceAllLiteral(regex string, s string, repl string) string { + r := regexp.MustCompile(regex) + return r.ReplaceAllLiteralString(s, repl) +} + +func mustRegexReplaceAllLiteral(regex string, s string, repl string) (string, error) { + r, err := regexp.Compile(regex) + if err != nil { + return "", err + } + return r.ReplaceAllLiteralString(s, repl), nil +} + +func regexSplit(regex string, s string, n int) []string { + r := regexp.MustCompile(regex) + return r.Split(s, n) +} + +func mustRegexSplit(regex string, s string, n int) ([]string, error) { + r, err := regexp.Compile(regex) + if err != nil { + return []string{}, err + } + return r.Split(s, n), nil +} + +func regexQuoteMeta(s string) string { + return regexp.QuoteMeta(s) +} diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/strings.go b/backend/vendor/github.com/go-task/slim-sprig/v3/strings.go new file mode 100644 index 0000000..3c62d6b --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/strings.go @@ -0,0 +1,189 @@ +package sprig + +import ( + "encoding/base32" + "encoding/base64" + "fmt" + "reflect" + "strconv" + "strings" +) + +func base64encode(v string) string { + return base64.StdEncoding.EncodeToString([]byte(v)) +} + +func base64decode(v string) string { + data, err := base64.StdEncoding.DecodeString(v) + if err != nil { + return err.Error() + } + return string(data) +} + +func base32encode(v string) string { + return base32.StdEncoding.EncodeToString([]byte(v)) +} + +func base32decode(v string) string { + data, err := base32.StdEncoding.DecodeString(v) + if err != nil { + return err.Error() + } + return string(data) +} + +func quote(str ...interface{}) string { + out := make([]string, 0, len(str)) + for _, s := range str { + if s != nil { + out = append(out, fmt.Sprintf("%q", strval(s))) + } + } + return strings.Join(out, " ") +} + +func squote(str ...interface{}) string { + out := make([]string, 0, len(str)) + for _, s := range str { + if s != nil { + out = append(out, fmt.Sprintf("'%v'", s)) + } + } + return strings.Join(out, " ") +} + +func cat(v ...interface{}) string { + v = removeNilElements(v) + r := strings.TrimSpace(strings.Repeat("%v ", len(v))) + return fmt.Sprintf(r, v...) +} + +func indent(spaces int, v string) string { + pad := strings.Repeat(" ", spaces) + return pad + strings.Replace(v, "\n", "\n"+pad, -1) +} + +func nindent(spaces int, v string) string { + return "\n" + indent(spaces, v) +} + +func replace(old, new, src string) string { + return strings.Replace(src, old, new, -1) +} + +func plural(one, many string, count int) string { + if count == 1 { + return one + } + return many +} + +func strslice(v interface{}) []string { + switch v := v.(type) { + case []string: + return v + case []interface{}: + b := make([]string, 0, len(v)) + for _, s := range v { + if s != nil { + b = append(b, strval(s)) + } + } + return b + default: + val := reflect.ValueOf(v) + switch val.Kind() { + case reflect.Array, reflect.Slice: + l := val.Len() + b := make([]string, 0, l) + for i := 0; i < l; i++ { + value := val.Index(i).Interface() + if value != nil { + b = append(b, strval(value)) + } + } + return b + default: + if v == nil { + return []string{} + } + + return []string{strval(v)} + } + } +} + +func removeNilElements(v []interface{}) []interface{} { + newSlice := make([]interface{}, 0, len(v)) + for _, i := range v { + if i != nil { + newSlice = append(newSlice, i) + } + } + return newSlice +} + +func strval(v interface{}) string { + switch v := v.(type) { + case string: + return v + case []byte: + return string(v) + case error: + return v.Error() + case fmt.Stringer: + return v.String() + default: + return fmt.Sprintf("%v", v) + } +} + +func trunc(c int, s string) string { + if c < 0 && len(s)+c > 0 { + return s[len(s)+c:] + } + if c >= 0 && len(s) > c { + return s[:c] + } + return s +} + +func join(sep string, v interface{}) string { + return strings.Join(strslice(v), sep) +} + +func split(sep, orig string) map[string]string { + parts := strings.Split(orig, sep) + res := make(map[string]string, len(parts)) + for i, v := range parts { + res["_"+strconv.Itoa(i)] = v + } + return res +} + +func splitn(sep string, n int, orig string) map[string]string { + parts := strings.SplitN(orig, sep, n) + res := make(map[string]string, len(parts)) + for i, v := range parts { + res["_"+strconv.Itoa(i)] = v + } + return res +} + +// substring creates a substring of the given string. +// +// If start is < 0, this calls string[:end]. +// +// If start is >= 0 and end < 0 or end bigger than s length, this calls string[start:] +// +// Otherwise, this calls string[start, end]. +func substring(start, end int, s string) string { + if start < 0 { + return s[:end] + } + if end < 0 || end > len(s) { + return s[start:] + } + return s[start:end] +} diff --git a/backend/vendor/github.com/go-task/slim-sprig/v3/url.go b/backend/vendor/github.com/go-task/slim-sprig/v3/url.go new file mode 100644 index 0000000..b8e120e --- /dev/null +++ b/backend/vendor/github.com/go-task/slim-sprig/v3/url.go @@ -0,0 +1,66 @@ +package sprig + +import ( + "fmt" + "net/url" + "reflect" +) + +func dictGetOrEmpty(dict map[string]interface{}, key string) string { + value, ok := dict[key] + if !ok { + return "" + } + tp := reflect.TypeOf(value).Kind() + if tp != reflect.String { + panic(fmt.Sprintf("unable to parse %s key, must be of type string, but %s found", key, tp.String())) + } + return reflect.ValueOf(value).String() +} + +// parses given URL to return dict object +func urlParse(v string) map[string]interface{} { + dict := map[string]interface{}{} + parsedURL, err := url.Parse(v) + if err != nil { + panic(fmt.Sprintf("unable to parse url: %s", err)) + } + dict["scheme"] = parsedURL.Scheme + dict["host"] = parsedURL.Host + dict["hostname"] = parsedURL.Hostname() + dict["path"] = parsedURL.Path + dict["query"] = parsedURL.RawQuery + dict["opaque"] = parsedURL.Opaque + dict["fragment"] = parsedURL.Fragment + if parsedURL.User != nil { + dict["userinfo"] = parsedURL.User.String() + } else { + dict["userinfo"] = "" + } + + return dict +} + +// join given dict to URL string +func urlJoin(d map[string]interface{}) string { + resURL := url.URL{ + Scheme: dictGetOrEmpty(d, "scheme"), + Host: dictGetOrEmpty(d, "host"), + Path: dictGetOrEmpty(d, "path"), + RawQuery: dictGetOrEmpty(d, "query"), + Opaque: dictGetOrEmpty(d, "opaque"), + Fragment: dictGetOrEmpty(d, "fragment"), + } + userinfo := dictGetOrEmpty(d, "userinfo") + var user *url.Userinfo + if userinfo != "" { + tempURL, err := url.Parse(fmt.Sprintf("proto://%s@host", userinfo)) + if err != nil { + panic(fmt.Sprintf("unable to parse userinfo in dict: %s", err)) + } + user = tempURL.User + } + + resURL.User = user + return resURL.String() +} diff --git a/backend/vendor/github.com/google/gopacket/.gitignore b/backend/vendor/github.com/google/gopacket/.gitignore new file mode 100644 index 0000000..149266f --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/.gitignore @@ -0,0 +1,38 @@ +# Compiled Object files, Static and Dynamic libs (Shared Objects) +*.o +*.a +*.so + +# Folders +_obj +_test + +# Architecture specific extensions/prefixes +*.[568vq] +[568vq].out + +*.cgo1.go +*.cgo2.c +_cgo_defun.c +_cgo_gotypes.go +_cgo_export.* + +_testmain.go + +*.exe +#* +*~ + +# examples binaries +examples/synscan/synscan +examples/pfdump/pfdump +examples/pcapdump/pcapdump +examples/httpassembly/httpassembly +examples/statsassembly/statsassembly +examples/arpscan/arpscan +examples/bidirectional/bidirectional +examples/bytediff/bytediff +examples/reassemblydump/reassemblydump +layers/gen +macs/gen +pcap/pcap_tester diff --git a/backend/vendor/github.com/google/gopacket/.travis.gofmt.sh b/backend/vendor/github.com/google/gopacket/.travis.gofmt.sh new file mode 100644 index 0000000..e341a1c --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/.travis.gofmt.sh @@ -0,0 +1,7 @@ +#!/bin/bash + +cd "$(dirname $0)" +if [ -n "$(go fmt ./...)" ]; then + echo "Go code is not formatted, run 'go fmt github.com/google/stenographer/...'" >&2 + exit 1 +fi diff --git a/backend/vendor/github.com/google/gopacket/.travis.golint.sh b/backend/vendor/github.com/google/gopacket/.travis.golint.sh new file mode 100644 index 0000000..0e267f5 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/.travis.golint.sh @@ -0,0 +1,28 @@ +#!/bin/bash + +cd "$(dirname $0)" + +go get golang.org/x/lint/golint +DIRS=". tcpassembly tcpassembly/tcpreader ip4defrag reassembly macs pcapgo pcap afpacket pfring routing defrag/lcmdefrag" +# Add subdirectories here as we clean up golint on each. +for subdir in $DIRS; do + pushd $subdir + if golint | + grep -v CannotSetRFMon | # pcap exported error name + grep -v DataLost | # tcpassembly/tcpreader exported error name + grep .; then + exit 1 + fi + popd +done + +pushd layers +for file in *.go; do + if cat .lint_blacklist | grep -q $file; then + echo "Skipping lint of $file due to .lint_blacklist" + elif golint $file | grep .; then + echo "Lint error in file $file" + exit 1 + fi +done +popd diff --git a/backend/vendor/github.com/google/gopacket/.travis.govet.sh b/backend/vendor/github.com/google/gopacket/.travis.govet.sh new file mode 100644 index 0000000..a5c1354 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/.travis.govet.sh @@ -0,0 +1,10 @@ +#!/bin/bash + +cd "$(dirname $0)" +DIRS=". layers pcap pcapgo tcpassembly tcpassembly/tcpreader routing ip4defrag bytediff macs defrag/lcmdefrag" +set -e +for subdir in $DIRS; do + pushd $subdir + go vet + popd +done diff --git a/backend/vendor/github.com/google/gopacket/.travis.install.sh b/backend/vendor/github.com/google/gopacket/.travis.install.sh new file mode 100644 index 0000000..648c901 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/.travis.install.sh @@ -0,0 +1,9 @@ +#!/bin/bash + +set -ev + +go get github.com/google/gopacket +go get github.com/google/gopacket/layers +go get github.com/google/gopacket/tcpassembly +go get github.com/google/gopacket/reassembly +go get github.com/google/gopacket/pcapgo diff --git a/backend/vendor/github.com/google/gopacket/.travis.script.sh b/backend/vendor/github.com/google/gopacket/.travis.script.sh new file mode 100644 index 0000000..a483f4f --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/.travis.script.sh @@ -0,0 +1,10 @@ +#!/bin/bash + +set -ev + +go test github.com/google/gopacket +go test github.com/google/gopacket/layers +go test github.com/google/gopacket/tcpassembly +go test github.com/google/gopacket/reassembly +go test github.com/google/gopacket/pcapgo +go test github.com/google/gopacket/pcap diff --git a/backend/vendor/github.com/google/gopacket/.travis.yml b/backend/vendor/github.com/google/gopacket/.travis.yml new file mode 100644 index 0000000..84f1f49 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/.travis.yml @@ -0,0 +1,57 @@ +language: go +go: + - 1.11.x + - 1.12.x + - 1.13.x + - master + +addons: + apt: + packages: + libpcap-dev + +# use modules except for older versions (see below) +install: true + +env: + - GO111MODULE=on + +script: ./.travis.script.sh + +matrix: + fast_finish: true + allow_failures: + - go: master + +jobs: + include: + - go: 1.5.x + install: ./.travis.install.sh + - go: 1.6.x + install: ./.travis.install.sh + - go: 1.7.x + install: ./.travis.install.sh + - go: 1.8.x + install: ./.travis.install.sh + - go: 1.9.x + install: ./.travis.install.sh + - go: 1.10.x + install: ./.travis.install.sh + - os: osx + go: 1.x +# windows doesn't work on travis (package installation just hangs and then errors out) +# - os: windows +# go: 1.x +# # We don't need nmap - but that's the only way to get npcap: +# before_install: choco install npcap --version 0.86 -y + - stage: style + name: "fmt/vet/lint" + go: 1.x + script: + - ./.travis.gofmt.sh + - ./.travis.govet.sh + - ./.travis.golint.sh + +stages: + - style + - test diff --git a/backend/vendor/github.com/google/gopacket/AUTHORS b/backend/vendor/github.com/google/gopacket/AUTHORS new file mode 100644 index 0000000..24e834e --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/AUTHORS @@ -0,0 +1,54 @@ +AUTHORS AND MAINTAINERS: + +MAIN DEVELOPERS: +Graeme Connell + +AUTHORS: +Nigel Tao +Cole Mickens +Ben Daglish +Luis Martinez +Remco Verhoef +Hiroaki Kawai +Lukas Lueg +Laurent Hausermann +Bill Green +Christian Mäder +Gernot Vormayr +Vitor Garcia Graveto +Elias Chavarria Reyes +Daniel Rittweiler + +CONTRIBUTORS: +Attila Oláh +Vittus Mikiassen +Matthias Radestock +Matthew Sackman +Loic Prylli +Alexandre Fiori +Adrian Tam +Satoshi Matsumoto +David Stainton +Jesse Ward +Kane Mathers +Jose Selvi +Yerden Zhumabekov +Jensen Hwa + +----------------------------------------------- +FORKED FROM github.com/akrennmair/gopcap +ALL THE FOLLOWING ARE FOR THAT PROJECT + +MAIN DEVELOPERS: +Andreas Krennmair + +CONTRIBUTORS: +Andrea Nall +Daniel Arndt +Dustin Sallings +Graeme Connell +Guillaume Savary +Mark Smith +Miek Gieben +Mike Bell +Trevor Strohman diff --git a/backend/vendor/github.com/google/gopacket/CONTRIBUTING.md b/backend/vendor/github.com/google/gopacket/CONTRIBUTING.md new file mode 100644 index 0000000..99ab7a2 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/CONTRIBUTING.md @@ -0,0 +1,215 @@ +Contributing To gopacket +======================== + +So you've got some code and you'd like it to be part of gopacket... wonderful! +We're happy to accept contributions, whether they're fixes to old protocols, new +protocols entirely, or anything else you think would improve the gopacket +library. This document is designed to help you to do just that. + +The first section deals with the plumbing: how to actually get a change +submitted. + +The second section deals with coding style... Go is great in that it +has a uniform style implemented by 'go fmt', but there's still some decisions +we've made that go above and beyond, and if you follow them, they won't come up +in your code review. + +The third section deals with some of the implementation decisions we've made, +which may help you to understand the current code and which we may ask you to +conform to (or provide compelling reasons for ignoring). + +Overall, we hope this document will help you to understand our system and write +great code which fits in, and help us to turn around on your code review quickly +so the code can make it into the master branch as quickly as possible. + + +How To Submit Code +------------------ + +We use github.com's Pull Request feature to receive code contributions from +external contributors. See +https://help.github.com/articles/creating-a-pull-request/ for details on +how to create a request. + +Also, there's a local script `gc` in the base directory of GoPacket that +runs a local set of checks, which should give you relatively high confidence +that your pull won't fail github pull checks. + +```sh +go get github.com/google/gopacket +cd $GOROOT/src/pkg/github.com/google/gopacket +git checkout -b # create a new branch to work from +... code code code ... +./gc # Run this to do local commits, it performs a number of checks +``` + +To sum up: + +* DO + + Pull down the latest version. + + Make a feature-specific branch. + + Code using the style and methods discussed in the rest of this document. + + Use the ./gc command to do local commits or check correctness. + + Push your new feature branch up to github.com, as a pull request. + + Handle comments and requests from reviewers, pushing new commits up to + your feature branch as problems are addressed. + + Put interesting comments and discussions into commit comments. +* DON'T + + Push to someone else's branch without their permission. + + +Coding Style +------------ + +* Go code must be run through `go fmt`, `go vet`, and `golint` +* Follow http://golang.org/doc/effective_go.html as much as possible. + + In particular, http://golang.org/doc/effective_go.html#mixed-caps. Enums + should be be CamelCase, with acronyms capitalized (TCPSourcePort, vs. + TcpSourcePort or TCP_SOURCE_PORT). +* Bonus points for giving enum types a String() field. +* Any exported types or functions should have commentary + (http://golang.org/doc/effective_go.html#commentary) + + +Coding Methods And Implementation Notes +--------------------------------------- + +### Error Handling + +Many times, you'll be decoding a protocol and run across something bad, a packet +corruption or the like. How do you handle this? First off, ALWAYS report the +error. You can do this either by returning the error from the decode() function +(most common), or if you're up for it you can implement and add an ErrorLayer +through the packet builder (the first method is a simple shortcut that does +exactly this, then stops any future decoding). + +Often, you'll already have decode some part of your protocol by the time you hit +your error. Use your own discretion to determine whether the stuff you've +already decoded should be returned to the caller or not: + +```go +func decodeMyProtocol(data []byte, p gopacket.PacketBuilder) error { + prot := &MyProtocol{} + if len(data) < 10 { + // This error occurred before we did ANYTHING, so there's nothing in my + // protocol that the caller could possibly want. Just return the error. + return fmt.Errorf("Length %d less than 10", len(data)) + } + prot.ImportantField1 = data[:5] + prot.ImportantField2 = data[5:10] + // At this point, we've already got enough information in 'prot' to + // warrant returning it to the caller, so we'll add it now. + p.AddLayer(prot) + if len(data) < 15 { + // We encountered an error later in the packet, but the caller already + // has the important info we've gleaned so far. + return fmt.Errorf("Length %d less than 15", len(data)) + } + prot.ImportantField3 = data[10:15] + return nil // We've already added the layer, we can just return success. +} +``` + +In general, our code follows the approach of returning the first error it +encounters. In general, we don't trust any bytes after the first error we see. + +### What Is A Layer? + +The definition of a layer is up to the discretion of the coder. It should be +something important enough that it's actually useful to the caller (IE: every +TLV value should probably NOT be a layer). However, it can be more granular +than a single protocol... IPv6 and SCTP both implement many layers to handle the +various parts of the protocol. Use your best judgement, and prepare to defend +your decisions during code review. ;) + +### Performance + +We strive to make gopacket as fast as possible while still providing lots of +features. In general, this means: + +* Focus performance tuning on common protocols (IP4/6, TCP, etc), and optimize + others on an as-needed basis (tons of MPLS on your network? Time to optimize + MPLS!) +* Use fast operations. See the toplevel benchmark_test for benchmarks of some + of Go's underlying features and types. +* Test your performance changes! You should use the ./gc script's --benchmark + flag to submit any performance-related changes. Use pcap/gopacket_benchmark + to test your change against a PCAP file based on your traffic patterns. +* Don't be TOO hacky. Sometimes, removing an unused struct from a field causes + a huge performance hit, due to the way that Go currently handles its segmented + stack... don't be afraid to clean it up anyway. We'll trust the Go compiler + to get good enough over time to handle this. Also, this type of + compiler-specific optimization is very fragile; someone adding a field to an + entirely different struct elsewhere in the codebase could reverse any gains + you might achieve by aligning your allocations. +* Try to minimize memory allocations. If possible, use []byte to reference + pieces of the input, instead of using string, which requires copying the bytes + into a new memory allocation. +* Think hard about what should be evaluated lazily vs. not. In general, a + layer's struct should almost exactly mirror the layer's frame. Anything + that's more interesting should be a function. This may not always be + possible, but it's a good rule of thumb. +* Don't fear micro-optimizations. With the above in mind, we welcome + micro-optimizations that we think will have positive/neutral impacts on the + majority of workloads. A prime example of this is pre-allocating certain + structs within a larger one: + +```go +type MyProtocol struct { + // Most packets have 1-4 of VeryCommon, so we preallocate it here. + initialAllocation [4]uint32 + VeryCommon []uint32 +} + +func decodeMyProtocol(data []byte, p gopacket.PacketBuilder) error { + prot := &MyProtocol{} + prot.VeryCommon = proto.initialAllocation[:0] + for len(data) > 4 { + field := binary.BigEndian.Uint32(data[:4]) + data = data[4:] + // Since we're using the underlying initialAllocation, we won't need to + // allocate new memory for the following append unless we more than 16 + // bytes of data, which should be the uncommon case. + prot.VeryCommon = append(prot.VeryCommon, field) + } + p.AddLayer(prot) + if len(data) > 0 { + return fmt.Errorf("MyProtocol packet has %d bytes left after decoding", len(data)) + } + return nil +} +``` + +### Slices And Data + +If you're pulling a slice from the data you're decoding, don't copy it. Just +use the slice itself. + +```go +type MyProtocol struct { + A, B net.IP +} +func decodeMyProtocol(data []byte, p gopacket.PacketBuilder) error { + p.AddLayer(&MyProtocol{ + A: data[:4], + B: data[4:8], + }) + return nil +} +``` + +The caller has already agreed, by using this library, that they won't modify the +set of bytes they pass in to the decoder, or the library has already copied the +set of bytes to a read-only location. See DecodeOptions.NoCopy for more +information. + +### Enums/Types + +If a protocol has an integer field (uint8, uint16, etc) with a couple of known +values that mean something special, make it a type. This allows us to do really +nice things like adding a String() function to them, so we can more easily +display those to users. Check out layers/enums.go for one example, as well as +layers/icmp.go for layer-specific enums. + +When naming things, try for descriptiveness over suscinctness. For example, +choose DNSResponseRecord over DNSRR. diff --git a/backend/vendor/github.com/google/gopacket/LICENSE b/backend/vendor/github.com/google/gopacket/LICENSE new file mode 100644 index 0000000..2100d52 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/LICENSE @@ -0,0 +1,28 @@ +Copyright (c) 2012 Google, Inc. All rights reserved. +Copyright (c) 2009-2011 Andreas Krennmair. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Andreas Krennmair, Google, nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/backend/vendor/github.com/google/gopacket/README.md b/backend/vendor/github.com/google/gopacket/README.md new file mode 100644 index 0000000..efe462e --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/README.md @@ -0,0 +1,12 @@ +# GoPacket + +This library provides packet decoding capabilities for Go. +See [godoc](https://godoc.org/github.com/google/gopacket) for more details. + +[![Build Status](https://travis-ci.org/google/gopacket.svg?branch=master)](https://travis-ci.org/google/gopacket) +[![GoDoc](https://godoc.org/github.com/google/gopacket?status.svg)](https://godoc.org/github.com/google/gopacket) + +Minimum Go version required is 1.5 except for pcapgo/EthernetHandle, afpacket, and bsdbpf which need at least 1.9 due to x/sys/unix dependencies. + +Originally forked from the gopcap project written by Andreas +Krennmair (http://github.com/akrennmair/gopcap). diff --git a/backend/vendor/github.com/google/gopacket/base.go b/backend/vendor/github.com/google/gopacket/base.go new file mode 100644 index 0000000..91e150c --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/base.go @@ -0,0 +1,178 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package gopacket + +import ( + "fmt" +) + +// Layer represents a single decoded packet layer (using either the +// OSI or TCP/IP definition of a layer). When decoding, a packet's data is +// broken up into a number of layers. The caller may call LayerType() to +// figure out which type of layer they've received from the packet. Optionally, +// they may then use a type assertion to get the actual layer type for deep +// inspection of the data. +type Layer interface { + // LayerType is the gopacket type for this layer. + LayerType() LayerType + // LayerContents returns the set of bytes that make up this layer. + LayerContents() []byte + // LayerPayload returns the set of bytes contained within this layer, not + // including the layer itself. + LayerPayload() []byte +} + +// Payload is a Layer containing the payload of a packet. The definition of +// what constitutes the payload of a packet depends on previous layers; for +// TCP and UDP, we stop decoding above layer 4 and return the remaining +// bytes as a Payload. Payload is an ApplicationLayer. +type Payload []byte + +// LayerType returns LayerTypePayload +func (p Payload) LayerType() LayerType { return LayerTypePayload } + +// LayerContents returns the bytes making up this layer. +func (p Payload) LayerContents() []byte { return []byte(p) } + +// LayerPayload returns the payload within this layer. +func (p Payload) LayerPayload() []byte { return nil } + +// Payload returns this layer as bytes. +func (p Payload) Payload() []byte { return []byte(p) } + +// String implements fmt.Stringer. +func (p Payload) String() string { return fmt.Sprintf("%d byte(s)", len(p)) } + +// GoString implements fmt.GoStringer. +func (p Payload) GoString() string { return LongBytesGoString([]byte(p)) } + +// CanDecode implements DecodingLayer. +func (p Payload) CanDecode() LayerClass { return LayerTypePayload } + +// NextLayerType implements DecodingLayer. +func (p Payload) NextLayerType() LayerType { return LayerTypeZero } + +// DecodeFromBytes implements DecodingLayer. +func (p *Payload) DecodeFromBytes(data []byte, df DecodeFeedback) error { + *p = Payload(data) + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (p Payload) SerializeTo(b SerializeBuffer, opts SerializeOptions) error { + bytes, err := b.PrependBytes(len(p)) + if err != nil { + return err + } + copy(bytes, p) + return nil +} + +// decodePayload decodes data by returning it all in a Payload layer. +func decodePayload(data []byte, p PacketBuilder) error { + payload := &Payload{} + if err := payload.DecodeFromBytes(data, p); err != nil { + return err + } + p.AddLayer(payload) + p.SetApplicationLayer(payload) + return nil +} + +// Fragment is a Layer containing a fragment of a larger frame, used by layers +// like IPv4 and IPv6 that allow for fragmentation of their payloads. +type Fragment []byte + +// LayerType returns LayerTypeFragment +func (p *Fragment) LayerType() LayerType { return LayerTypeFragment } + +// LayerContents implements Layer. +func (p *Fragment) LayerContents() []byte { return []byte(*p) } + +// LayerPayload implements Layer. +func (p *Fragment) LayerPayload() []byte { return nil } + +// Payload returns this layer as a byte slice. +func (p *Fragment) Payload() []byte { return []byte(*p) } + +// String implements fmt.Stringer. +func (p *Fragment) String() string { return fmt.Sprintf("%d byte(s)", len(*p)) } + +// CanDecode implements DecodingLayer. +func (p *Fragment) CanDecode() LayerClass { return LayerTypeFragment } + +// NextLayerType implements DecodingLayer. +func (p *Fragment) NextLayerType() LayerType { return LayerTypeZero } + +// DecodeFromBytes implements DecodingLayer. +func (p *Fragment) DecodeFromBytes(data []byte, df DecodeFeedback) error { + *p = Fragment(data) + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (p *Fragment) SerializeTo(b SerializeBuffer, opts SerializeOptions) error { + bytes, err := b.PrependBytes(len(*p)) + if err != nil { + return err + } + copy(bytes, *p) + return nil +} + +// decodeFragment decodes data by returning it all in a Fragment layer. +func decodeFragment(data []byte, p PacketBuilder) error { + payload := &Fragment{} + if err := payload.DecodeFromBytes(data, p); err != nil { + return err + } + p.AddLayer(payload) + p.SetApplicationLayer(payload) + return nil +} + +// These layers correspond to Internet Protocol Suite (TCP/IP) layers, and their +// corresponding OSI layers, as best as possible. + +// LinkLayer is the packet layer corresponding to TCP/IP layer 1 (OSI layer 2) +type LinkLayer interface { + Layer + LinkFlow() Flow +} + +// NetworkLayer is the packet layer corresponding to TCP/IP layer 2 (OSI +// layer 3) +type NetworkLayer interface { + Layer + NetworkFlow() Flow +} + +// TransportLayer is the packet layer corresponding to the TCP/IP layer 3 (OSI +// layer 4) +type TransportLayer interface { + Layer + TransportFlow() Flow +} + +// ApplicationLayer is the packet layer corresponding to the TCP/IP layer 4 (OSI +// layer 7), also known as the packet payload. +type ApplicationLayer interface { + Layer + Payload() []byte +} + +// ErrorLayer is a packet layer created when decoding of the packet has failed. +// Its payload is all the bytes that we were unable to decode, and the returned +// error details why the decoding failed. +type ErrorLayer interface { + Layer + Error() error +} diff --git a/backend/vendor/github.com/google/gopacket/decode.go b/backend/vendor/github.com/google/gopacket/decode.go new file mode 100644 index 0000000..2633f84 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/decode.go @@ -0,0 +1,157 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package gopacket + +import ( + "errors" +) + +// DecodeFeedback is used by DecodingLayer layers to provide decoding metadata. +type DecodeFeedback interface { + // SetTruncated should be called if during decoding you notice that a packet + // is shorter than internal layer variables (HeaderLength, or the like) say it + // should be. It sets packet.Metadata().Truncated. + SetTruncated() +} + +type nilDecodeFeedback struct{} + +func (nilDecodeFeedback) SetTruncated() {} + +// NilDecodeFeedback implements DecodeFeedback by doing nothing. +var NilDecodeFeedback DecodeFeedback = nilDecodeFeedback{} + +// PacketBuilder is used by layer decoders to store the layers they've decoded, +// and to defer future decoding via NextDecoder. +// Typically, the pattern for use is: +// func (m *myDecoder) Decode(data []byte, p PacketBuilder) error { +// if myLayer, err := myDecodingLogic(data); err != nil { +// return err +// } else { +// p.AddLayer(myLayer) +// } +// // maybe do this, if myLayer is a LinkLayer +// p.SetLinkLayer(myLayer) +// return p.NextDecoder(nextDecoder) +// } +type PacketBuilder interface { + DecodeFeedback + // AddLayer should be called by a decoder immediately upon successful + // decoding of a layer. + AddLayer(l Layer) + // The following functions set the various specific layers in the final + // packet. Note that if many layers call SetX, the first call is kept and all + // other calls are ignored. + SetLinkLayer(LinkLayer) + SetNetworkLayer(NetworkLayer) + SetTransportLayer(TransportLayer) + SetApplicationLayer(ApplicationLayer) + SetErrorLayer(ErrorLayer) + // NextDecoder should be called by a decoder when they're done decoding a + // packet layer but not done with decoding the entire packet. The next + // decoder will be called to decode the last AddLayer's LayerPayload. + // Because of this, NextDecoder must only be called once all other + // PacketBuilder calls have been made. Set*Layer and AddLayer calls after + // NextDecoder calls will behave incorrectly. + NextDecoder(next Decoder) error + // DumpPacketData is used solely for decoding. If you come across an error + // you need to diagnose while processing a packet, call this and your packet's + // data will be dumped to stderr so you can create a test. This should never + // be called from a production decoder. + DumpPacketData() + // DecodeOptions returns the decode options + DecodeOptions() *DecodeOptions +} + +// Decoder is an interface for logic to decode a packet layer. Users may +// implement a Decoder to handle their own strange packet types, or may use one +// of the many decoders available in the 'layers' subpackage to decode things +// for them. +type Decoder interface { + // Decode decodes the bytes of a packet, sending decoded values and other + // information to PacketBuilder, and returning an error if unsuccessful. See + // the PacketBuilder documentation for more details. + Decode([]byte, PacketBuilder) error +} + +// DecodeFunc wraps a function to make it a Decoder. +type DecodeFunc func([]byte, PacketBuilder) error + +// Decode implements Decoder by calling itself. +func (d DecodeFunc) Decode(data []byte, p PacketBuilder) error { + // function, call thyself. + return d(data, p) +} + +// DecodePayload is a Decoder that returns a Payload layer containing all +// remaining bytes. +var DecodePayload Decoder = DecodeFunc(decodePayload) + +// DecodeUnknown is a Decoder that returns an Unknown layer containing all +// remaining bytes, useful if you run up against a layer that you're unable to +// decode yet. This layer is considered an ErrorLayer. +var DecodeUnknown Decoder = DecodeFunc(decodeUnknown) + +// DecodeFragment is a Decoder that returns a Fragment layer containing all +// remaining bytes. +var DecodeFragment Decoder = DecodeFunc(decodeFragment) + +// LayerTypeZero is an invalid layer type, but can be used to determine whether +// layer type has actually been set correctly. +var LayerTypeZero = RegisterLayerType(0, LayerTypeMetadata{Name: "Unknown", Decoder: DecodeUnknown}) + +// LayerTypeDecodeFailure is the layer type for the default error layer. +var LayerTypeDecodeFailure = RegisterLayerType(1, LayerTypeMetadata{Name: "DecodeFailure", Decoder: DecodeUnknown}) + +// LayerTypePayload is the layer type for a payload that we don't try to decode +// but treat as a success, IE: an application-level payload. +var LayerTypePayload = RegisterLayerType(2, LayerTypeMetadata{Name: "Payload", Decoder: DecodePayload}) + +// LayerTypeFragment is the layer type for a fragment of a layer transported +// by an underlying layer that supports fragmentation. +var LayerTypeFragment = RegisterLayerType(3, LayerTypeMetadata{Name: "Fragment", Decoder: DecodeFragment}) + +// DecodeFailure is a packet layer created if decoding of the packet data failed +// for some reason. It implements ErrorLayer. LayerContents will be the entire +// set of bytes that failed to parse, and Error will return the reason parsing +// failed. +type DecodeFailure struct { + data []byte + err error + stack []byte +} + +// Error returns the error encountered during decoding. +func (d *DecodeFailure) Error() error { return d.err } + +// LayerContents implements Layer. +func (d *DecodeFailure) LayerContents() []byte { return d.data } + +// LayerPayload implements Layer. +func (d *DecodeFailure) LayerPayload() []byte { return nil } + +// String implements fmt.Stringer. +func (d *DecodeFailure) String() string { + return "Packet decoding error: " + d.Error().Error() +} + +// Dump implements Dumper. +func (d *DecodeFailure) Dump() (s string) { + if d.stack != nil { + s = string(d.stack) + } + return +} + +// LayerType returns LayerTypeDecodeFailure +func (d *DecodeFailure) LayerType() LayerType { return LayerTypeDecodeFailure } + +// decodeUnknown "decodes" unsupported data types by returning an error. +// This decoder will thus always return a DecodeFailure layer. +func decodeUnknown(data []byte, p PacketBuilder) error { + return errors.New("Layer type not currently supported") +} diff --git a/backend/vendor/github.com/google/gopacket/doc.go b/backend/vendor/github.com/google/gopacket/doc.go new file mode 100644 index 0000000..b46e43d --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/doc.go @@ -0,0 +1,432 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +/* +Package gopacket provides packet decoding for the Go language. + +gopacket contains many sub-packages with additional functionality you may find +useful, including: + + * layers: You'll probably use this every time. This contains of the logic + built into gopacket for decoding packet protocols. Note that all example + code below assumes that you have imported both gopacket and + gopacket/layers. + * pcap: C bindings to use libpcap to read packets off the wire. + * pfring: C bindings to use PF_RING to read packets off the wire. + * afpacket: C bindings for Linux's AF_PACKET to read packets off the wire. + * tcpassembly: TCP stream reassembly + +Also, if you're looking to dive right into code, see the examples subdirectory +for numerous simple binaries built using gopacket libraries. + +Minimum go version required is 1.5 except for pcapgo/EthernetHandle, afpacket, +and bsdbpf which need at least 1.7 due to x/sys/unix dependencies. + +Basic Usage + +gopacket takes in packet data as a []byte and decodes it into a packet with +a non-zero number of "layers". Each layer corresponds to a protocol +within the bytes. Once a packet has been decoded, the layers of the packet +can be requested from the packet. + + // Decode a packet + packet := gopacket.NewPacket(myPacketData, layers.LayerTypeEthernet, gopacket.Default) + // Get the TCP layer from this packet + if tcpLayer := packet.Layer(layers.LayerTypeTCP); tcpLayer != nil { + fmt.Println("This is a TCP packet!") + // Get actual TCP data from this layer + tcp, _ := tcpLayer.(*layers.TCP) + fmt.Printf("From src port %d to dst port %d\n", tcp.SrcPort, tcp.DstPort) + } + // Iterate over all layers, printing out each layer type + for _, layer := range packet.Layers() { + fmt.Println("PACKET LAYER:", layer.LayerType()) + } + +Packets can be decoded from a number of starting points. Many of our base +types implement Decoder, which allow us to decode packets for which +we don't have full data. + + // Decode an ethernet packet + ethP := gopacket.NewPacket(p1, layers.LayerTypeEthernet, gopacket.Default) + // Decode an IPv6 header and everything it contains + ipP := gopacket.NewPacket(p2, layers.LayerTypeIPv6, gopacket.Default) + // Decode a TCP header and its payload + tcpP := gopacket.NewPacket(p3, layers.LayerTypeTCP, gopacket.Default) + + +Reading Packets From A Source + +Most of the time, you won't just have a []byte of packet data lying around. +Instead, you'll want to read packets in from somewhere (file, interface, etc) +and process them. To do that, you'll want to build a PacketSource. + +First, you'll need to construct an object that implements the PacketDataSource +interface. There are implementations of this interface bundled with gopacket +in the gopacket/pcap and gopacket/pfring subpackages... see their documentation +for more information on their usage. Once you have a PacketDataSource, you can +pass it into NewPacketSource, along with a Decoder of your choice, to create +a PacketSource. + +Once you have a PacketSource, you can read packets from it in multiple ways. +See the docs for PacketSource for more details. The easiest method is the +Packets function, which returns a channel, then asynchronously writes new +packets into that channel, closing the channel if the packetSource hits an +end-of-file. + + packetSource := ... // construct using pcap or pfring + for packet := range packetSource.Packets() { + handlePacket(packet) // do something with each packet + } + +You can change the decoding options of the packetSource by setting fields in +packetSource.DecodeOptions... see the following sections for more details. + + +Lazy Decoding + +gopacket optionally decodes packet data lazily, meaning it +only decodes a packet layer when it needs to handle a function call. + + // Create a packet, but don't actually decode anything yet + packet := gopacket.NewPacket(myPacketData, layers.LayerTypeEthernet, gopacket.Lazy) + // Now, decode the packet up to the first IPv4 layer found but no further. + // If no IPv4 layer was found, the whole packet will be decoded looking for + // it. + ip4 := packet.Layer(layers.LayerTypeIPv4) + // Decode all layers and return them. The layers up to the first IPv4 layer + // are already decoded, and will not require decoding a second time. + layers := packet.Layers() + +Lazily-decoded packets are not concurrency-safe. Since layers have not all been +decoded, each call to Layer() or Layers() has the potential to mutate the packet +in order to decode the next layer. If a packet is used +in multiple goroutines concurrently, don't use gopacket.Lazy. Then gopacket +will decode the packet fully, and all future function calls won't mutate the +object. + + +NoCopy Decoding + +By default, gopacket will copy the slice passed to NewPacket and store the +copy within the packet, so future mutations to the bytes underlying the slice +don't affect the packet and its layers. If you can guarantee that the +underlying slice bytes won't be changed, you can use NoCopy to tell +gopacket.NewPacket, and it'll use the passed-in slice itself. + + // This channel returns new byte slices, each of which points to a new + // memory location that's guaranteed immutable for the duration of the + // packet. + for data := range myByteSliceChannel { + p := gopacket.NewPacket(data, layers.LayerTypeEthernet, gopacket.NoCopy) + doSomethingWithPacket(p) + } + +The fastest method of decoding is to use both Lazy and NoCopy, but note from +the many caveats above that for some implementations either or both may be +dangerous. + + +Pointers To Known Layers + +During decoding, certain layers are stored in the packet as well-known +layer types. For example, IPv4 and IPv6 are both considered NetworkLayer +layers, while TCP and UDP are both TransportLayer layers. We support 4 +layers, corresponding to the 4 layers of the TCP/IP layering scheme (roughly +anagalous to layers 2, 3, 4, and 7 of the OSI model). To access these, +you can use the packet.LinkLayer, packet.NetworkLayer, +packet.TransportLayer, and packet.ApplicationLayer functions. Each of +these functions returns a corresponding interface +(gopacket.{Link,Network,Transport,Application}Layer). The first three +provide methods for getting src/dst addresses for that particular layer, +while the final layer provides a Payload function to get payload data. +This is helpful, for example, to get payloads for all packets regardless +of their underlying data type: + + // Get packets from some source + for packet := range someSource { + if app := packet.ApplicationLayer(); app != nil { + if strings.Contains(string(app.Payload()), "magic string") { + fmt.Println("Found magic string in a packet!") + } + } + } + +A particularly useful layer is ErrorLayer, which is set whenever there's +an error parsing part of the packet. + + packet := gopacket.NewPacket(myPacketData, layers.LayerTypeEthernet, gopacket.Default) + if err := packet.ErrorLayer(); err != nil { + fmt.Println("Error decoding some part of the packet:", err) + } + +Note that we don't return an error from NewPacket because we may have decoded +a number of layers successfully before running into our erroneous layer. You +may still be able to get your Ethernet and IPv4 layers correctly, even if +your TCP layer is malformed. + + +Flow And Endpoint + +gopacket has two useful objects, Flow and Endpoint, for communicating in a protocol +independent manner the fact that a packet is coming from A and going to B. +The general layer types LinkLayer, NetworkLayer, and TransportLayer all provide +methods for extracting their flow information, without worrying about the type +of the underlying Layer. + +A Flow is a simple object made up of a set of two Endpoints, one source and one +destination. It details the sender and receiver of the Layer of the Packet. + +An Endpoint is a hashable representation of a source or destination. For +example, for LayerTypeIPv4, an Endpoint contains the IP address bytes for a v4 +IP packet. A Flow can be broken into Endpoints, and Endpoints can be combined +into Flows: + + packet := gopacket.NewPacket(myPacketData, layers.LayerTypeEthernet, gopacket.Lazy) + netFlow := packet.NetworkLayer().NetworkFlow() + src, dst := netFlow.Endpoints() + reverseFlow := gopacket.NewFlow(dst, src) + +Both Endpoint and Flow objects can be used as map keys, and the equality +operator can compare them, so you can easily group together all packets +based on endpoint criteria: + + flows := map[gopacket.Endpoint]chan gopacket.Packet + packet := gopacket.NewPacket(myPacketData, layers.LayerTypeEthernet, gopacket.Lazy) + // Send all TCP packets to channels based on their destination port. + if tcp := packet.Layer(layers.LayerTypeTCP); tcp != nil { + flows[tcp.TransportFlow().Dst()] <- packet + } + // Look for all packets with the same source and destination network address + if net := packet.NetworkLayer(); net != nil { + src, dst := net.NetworkFlow().Endpoints() + if src == dst { + fmt.Println("Fishy packet has same network source and dst: %s", src) + } + } + // Find all packets coming from UDP port 1000 to UDP port 500 + interestingFlow := gopacket.FlowFromEndpoints(layers.NewUDPPortEndpoint(1000), layers.NewUDPPortEndpoint(500)) + if t := packet.NetworkLayer(); t != nil && t.TransportFlow() == interestingFlow { + fmt.Println("Found that UDP flow I was looking for!") + } + +For load-balancing purposes, both Flow and Endpoint have FastHash() functions, +which provide quick, non-cryptographic hashes of their contents. Of particular +importance is the fact that Flow FastHash() is symmetric: A->B will have the same +hash as B->A. An example usage could be: + + channels := [8]chan gopacket.Packet + for i := 0; i < 8; i++ { + channels[i] = make(chan gopacket.Packet) + go packetHandler(channels[i]) + } + for packet := range getPackets() { + if net := packet.NetworkLayer(); net != nil { + channels[int(net.NetworkFlow().FastHash()) & 0x7] <- packet + } + } + +This allows us to split up a packet stream while still making sure that each +stream sees all packets for a flow (and its bidirectional opposite). + + +Implementing Your Own Decoder + +If your network has some strange encapsulation, you can implement your own +decoder. In this example, we handle Ethernet packets which are encapsulated +in a 4-byte header. + + // Create a layer type, should be unique and high, so it doesn't conflict, + // giving it a name and a decoder to use. + var MyLayerType = gopacket.RegisterLayerType(12345, gopacket.LayerTypeMetadata{Name: "MyLayerType", Decoder: gopacket.DecodeFunc(decodeMyLayer)}) + + // Implement my layer + type MyLayer struct { + StrangeHeader []byte + payload []byte + } + func (m MyLayer) LayerType() gopacket.LayerType { return MyLayerType } + func (m MyLayer) LayerContents() []byte { return m.StrangeHeader } + func (m MyLayer) LayerPayload() []byte { return m.payload } + + // Now implement a decoder... this one strips off the first 4 bytes of the + // packet. + func decodeMyLayer(data []byte, p gopacket.PacketBuilder) error { + // Create my layer + p.AddLayer(&MyLayer{data[:4], data[4:]}) + // Determine how to handle the rest of the packet + return p.NextDecoder(layers.LayerTypeEthernet) + } + + // Finally, decode your packets: + p := gopacket.NewPacket(data, MyLayerType, gopacket.Lazy) + +See the docs for Decoder and PacketBuilder for more details on how coding +decoders works, or look at RegisterLayerType and RegisterEndpointType to see how +to add layer/endpoint types to gopacket. + + +Fast Decoding With DecodingLayerParser + +TLDR: DecodingLayerParser takes about 10% of the time as NewPacket to decode +packet data, but only for known packet stacks. + +Basic decoding using gopacket.NewPacket or PacketSource.Packets is somewhat slow +due to its need to allocate a new packet and every respective layer. It's very +versatile and can handle all known layer types, but sometimes you really only +care about a specific set of layers regardless, so that versatility is wasted. + +DecodingLayerParser avoids memory allocation altogether by decoding packet +layers directly into preallocated objects, which you can then reference to get +the packet's information. A quick example: + + func main() { + var eth layers.Ethernet + var ip4 layers.IPv4 + var ip6 layers.IPv6 + var tcp layers.TCP + parser := gopacket.NewDecodingLayerParser(layers.LayerTypeEthernet, ð, &ip4, &ip6, &tcp) + decoded := []gopacket.LayerType{} + for packetData := range somehowGetPacketData() { + if err := parser.DecodeLayers(packetData, &decoded); err != nil { + fmt.Fprintf(os.Stderr, "Could not decode layers: %v\n", err) + continue + } + for _, layerType := range decoded { + switch layerType { + case layers.LayerTypeIPv6: + fmt.Println(" IP6 ", ip6.SrcIP, ip6.DstIP) + case layers.LayerTypeIPv4: + fmt.Println(" IP4 ", ip4.SrcIP, ip4.DstIP) + } + } + } + } + +The important thing to note here is that the parser is modifying the passed in +layers (eth, ip4, ip6, tcp) instead of allocating new ones, thus greatly +speeding up the decoding process. It's even branching based on layer type... +it'll handle an (eth, ip4, tcp) or (eth, ip6, tcp) stack. However, it won't +handle any other type... since no other decoders were passed in, an (eth, ip4, +udp) stack will stop decoding after ip4, and only pass back [LayerTypeEthernet, +LayerTypeIPv4] through the 'decoded' slice (along with an error saying it can't +decode a UDP packet). + +Unfortunately, not all layers can be used by DecodingLayerParser... only those +implementing the DecodingLayer interface are usable. Also, it's possible to +create DecodingLayers that are not themselves Layers... see +layers.IPv6ExtensionSkipper for an example of this. + +Faster And Customized Decoding with DecodingLayerContainer + +By default, DecodingLayerParser uses native map to store and search for a layer +to decode. Though being versatile, in some cases this solution may be not so +optimal. For example, if you have only few layers faster operations may be +provided by sparse array indexing or linear array scan. + +To accomodate these scenarios, DecodingLayerContainer interface is introduced +along with its implementations: DecodingLayerSparse, DecodingLayerArray and +DecodingLayerMap. You can specify a container implementation to +DecodingLayerParser with SetDecodingLayerContainer method. Example: + + dlp := gopacket.NewDecodingLayerParser(LayerTypeEthernet) + dlp.SetDecodingLayerContainer(gopacket.DecodingLayerSparse(nil)) + var eth layers.Ethernet + dlp.AddDecodingLayer(ð) + // ... add layers and use DecodingLayerParser as usual... + +To skip one level of indirection (though sacrificing some capabilities) you may +also use DecodingLayerContainer as a decoding tool as it is. In this case you have to +handle unknown layer types and layer panics by yourself. Example: + + func main() { + var eth layers.Ethernet + var ip4 layers.IPv4 + var ip6 layers.IPv6 + var tcp layers.TCP + dlc := gopacket.DecodingLayerContainer(gopacket.DecodingLayerArray(nil)) + dlc = dlc.Put(ð) + dlc = dlc.Put(&ip4) + dlc = dlc.Put(&ip6) + dlc = dlc.Put(&tcp) + // you may specify some meaningful DecodeFeedback + decoder := dlc.LayersDecoder(LayerTypeEthernet, gopacket.NilDecodeFeedback) + decoded := make([]gopacket.LayerType, 0, 20) + for packetData := range somehowGetPacketData() { + lt, err := decoder(packetData, &decoded) + if err != nil { + fmt.Fprintf(os.Stderr, "Could not decode layers: %v\n", err) + continue + } + if lt != gopacket.LayerTypeZero { + fmt.Fprintf(os.Stderr, "unknown layer type: %v\n", lt) + continue + } + for _, layerType := range decoded { + // examine decoded layertypes just as already shown above + } + } + } + +DecodingLayerSparse is the fastest but most effective when LayerType values +that layers in use can decode are not large because otherwise that would lead +to bigger memory footprint. DecodingLayerArray is very compact and primarily +usable if the number of decoding layers is not big (up to ~10-15, but please do +your own benchmarks). DecodingLayerMap is the most versatile one and used by +DecodingLayerParser by default. Please refer to tests and benchmarks in layers +subpackage to further examine usage examples and performance measurements. + +You may also choose to implement your own DecodingLayerContainer if you want to +make use of your own internal packet decoding logic. + +Creating Packet Data + +As well as offering the ability to decode packet data, gopacket will allow you +to create packets from scratch, as well. A number of gopacket layers implement +the SerializableLayer interface; these layers can be serialized to a []byte in +the following manner: + + ip := &layers.IPv4{ + SrcIP: net.IP{1, 2, 3, 4}, + DstIP: net.IP{5, 6, 7, 8}, + // etc... + } + buf := gopacket.NewSerializeBuffer() + opts := gopacket.SerializeOptions{} // See SerializeOptions for more details. + err := ip.SerializeTo(buf, opts) + if err != nil { panic(err) } + fmt.Println(buf.Bytes()) // prints out a byte slice containing the serialized IPv4 layer. + +SerializeTo PREPENDS the given layer onto the SerializeBuffer, and they treat +the current buffer's Bytes() slice as the payload of the serializing layer. +Therefore, you can serialize an entire packet by serializing a set of layers in +reverse order (Payload, then TCP, then IP, then Ethernet, for example). The +SerializeBuffer's SerializeLayers function is a helper that does exactly that. + +To generate a (empty and useless, because no fields are set) +Ethernet(IPv4(TCP(Payload))) packet, for example, you can run: + + buf := gopacket.NewSerializeBuffer() + opts := gopacket.SerializeOptions{} + gopacket.SerializeLayers(buf, opts, + &layers.Ethernet{}, + &layers.IPv4{}, + &layers.TCP{}, + gopacket.Payload([]byte{1, 2, 3, 4})) + packetData := buf.Bytes() + +A Final Note + +If you use gopacket, you'll almost definitely want to make sure gopacket/layers +is imported, since when imported it sets all the LayerType variables and fills +in a lot of interesting variables/maps (DecodersByLayerName, etc). Therefore, +it's recommended that even if you don't use any layers functions directly, you still import with: + + import ( + _ "github.com/google/gopacket/layers" + ) +*/ +package gopacket diff --git a/backend/vendor/github.com/google/gopacket/flows.go b/backend/vendor/github.com/google/gopacket/flows.go new file mode 100644 index 0000000..a00c883 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/flows.go @@ -0,0 +1,236 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package gopacket + +import ( + "bytes" + "fmt" + "strconv" +) + +// MaxEndpointSize determines the maximum size in bytes of an endpoint address. +// +// Endpoints/Flows have a problem: They need to be hashable. Therefore, they +// can't use a byte slice. The two obvious choices are to use a string or a +// byte array. Strings work great, but string creation requires memory +// allocation, which can be slow. Arrays work great, but have a fixed size. We +// originally used the former, now we've switched to the latter. Use of a fixed +// byte-array doubles the speed of constructing a flow (due to not needing to +// allocate). This is a huge increase... too much for us to pass up. +// +// The end result of this, though, is that an endpoint/flow can't be created +// using more than MaxEndpointSize bytes per address. +const MaxEndpointSize = 16 + +// Endpoint is the set of bytes used to address packets at various layers. +// See LinkLayer, NetworkLayer, and TransportLayer specifications. +// Endpoints are usable as map keys. +type Endpoint struct { + typ EndpointType + len int + raw [MaxEndpointSize]byte +} + +// EndpointType returns the endpoint type associated with this endpoint. +func (a Endpoint) EndpointType() EndpointType { return a.typ } + +// Raw returns the raw bytes of this endpoint. These aren't human-readable +// most of the time, but they are faster than calling String. +func (a Endpoint) Raw() []byte { return a.raw[:a.len] } + +// LessThan provides a stable ordering for all endpoints. It sorts first based +// on the EndpointType of an endpoint, then based on the raw bytes of that +// endpoint. +// +// For some endpoints, the actual comparison may not make sense, however this +// ordering does provide useful information for most Endpoint types. +// Ordering is based first on endpoint type, then on raw endpoint bytes. +// Endpoint bytes are sorted lexicographically. +func (a Endpoint) LessThan(b Endpoint) bool { + return a.typ < b.typ || (a.typ == b.typ && bytes.Compare(a.raw[:a.len], b.raw[:b.len]) < 0) +} + +// fnvHash is used by our FastHash functions, and implements the FNV hash +// created by Glenn Fowler, Landon Curt Noll, and Phong Vo. +// See http://isthe.com/chongo/tech/comp/fnv/. +func fnvHash(s []byte) (h uint64) { + h = fnvBasis + for i := 0; i < len(s); i++ { + h ^= uint64(s[i]) + h *= fnvPrime + } + return +} + +const fnvBasis = 14695981039346656037 +const fnvPrime = 1099511628211 + +// FastHash provides a quick hashing function for an endpoint, useful if you'd +// like to split up endpoints by modulos or other load-balancing techniques. +// It uses a variant of Fowler-Noll-Vo hashing. +// +// The output of FastHash is not guaranteed to remain the same through future +// code revisions, so should not be used to key values in persistent storage. +func (a Endpoint) FastHash() (h uint64) { + h = fnvHash(a.raw[:a.len]) + h ^= uint64(a.typ) + h *= fnvPrime + return +} + +// NewEndpoint creates a new Endpoint object. +// +// The size of raw must be less than MaxEndpointSize, otherwise this function +// will panic. +func NewEndpoint(typ EndpointType, raw []byte) (e Endpoint) { + e.len = len(raw) + if e.len > MaxEndpointSize { + panic("raw byte length greater than MaxEndpointSize") + } + e.typ = typ + copy(e.raw[:], raw) + return +} + +// EndpointTypeMetadata is used to register a new endpoint type. +type EndpointTypeMetadata struct { + // Name is the string returned by an EndpointType's String function. + Name string + // Formatter is called from an Endpoint's String function to format the raw + // bytes in an Endpoint into a human-readable string. + Formatter func([]byte) string +} + +// EndpointType is the type of a gopacket Endpoint. This type determines how +// the bytes stored in the endpoint should be interpreted. +type EndpointType int64 + +var endpointTypes = map[EndpointType]EndpointTypeMetadata{} + +// RegisterEndpointType creates a new EndpointType and registers it globally. +// It MUST be passed a unique number, or it will panic. Numbers 0-999 are +// reserved for gopacket's use. +func RegisterEndpointType(num int, meta EndpointTypeMetadata) EndpointType { + t := EndpointType(num) + if _, ok := endpointTypes[t]; ok { + panic("Endpoint type number already in use") + } + endpointTypes[t] = meta + return t +} + +func (e EndpointType) String() string { + if t, ok := endpointTypes[e]; ok { + return t.Name + } + return strconv.Itoa(int(e)) +} + +func (a Endpoint) String() string { + if t, ok := endpointTypes[a.typ]; ok && t.Formatter != nil { + return t.Formatter(a.raw[:a.len]) + } + return fmt.Sprintf("%v:%v", a.typ, a.raw) +} + +// Flow represents the direction of traffic for a packet layer, as a source and destination Endpoint. +// Flows are usable as map keys. +type Flow struct { + typ EndpointType + slen, dlen int + src, dst [MaxEndpointSize]byte +} + +// FlowFromEndpoints creates a new flow by pasting together two endpoints. +// The endpoints must have the same EndpointType, or this function will return +// an error. +func FlowFromEndpoints(src, dst Endpoint) (_ Flow, err error) { + if src.typ != dst.typ { + err = fmt.Errorf("Mismatched endpoint types: %v->%v", src.typ, dst.typ) + return + } + return Flow{src.typ, src.len, dst.len, src.raw, dst.raw}, nil +} + +// FastHash provides a quick hashing function for a flow, useful if you'd +// like to split up flows by modulos or other load-balancing techniques. +// It uses a variant of Fowler-Noll-Vo hashing, and is guaranteed to collide +// with its reverse flow. IE: the flow A->B will have the same hash as the flow +// B->A. +// +// The output of FastHash is not guaranteed to remain the same through future +// code revisions, so should not be used to key values in persistent storage. +func (f Flow) FastHash() (h uint64) { + // This combination must be commutative. We don't use ^, since that would + // give the same hash for all A->A flows. + h = fnvHash(f.src[:f.slen]) + fnvHash(f.dst[:f.dlen]) + h ^= uint64(f.typ) + h *= fnvPrime + return +} + +// String returns a human-readable representation of this flow, in the form +// "Src->Dst" +func (f Flow) String() string { + s, d := f.Endpoints() + return fmt.Sprintf("%v->%v", s, d) +} + +// EndpointType returns the EndpointType for this Flow. +func (f Flow) EndpointType() EndpointType { + return f.typ +} + +// Endpoints returns the two Endpoints for this flow. +func (f Flow) Endpoints() (src, dst Endpoint) { + return Endpoint{f.typ, f.slen, f.src}, Endpoint{f.typ, f.dlen, f.dst} +} + +// Src returns the source Endpoint for this flow. +func (f Flow) Src() (src Endpoint) { + src, _ = f.Endpoints() + return +} + +// Dst returns the destination Endpoint for this flow. +func (f Flow) Dst() (dst Endpoint) { + _, dst = f.Endpoints() + return +} + +// Reverse returns a new flow with endpoints reversed. +func (f Flow) Reverse() Flow { + return Flow{f.typ, f.dlen, f.slen, f.dst, f.src} +} + +// NewFlow creates a new flow. +// +// src and dst must have length <= MaxEndpointSize, otherwise NewFlow will +// panic. +func NewFlow(t EndpointType, src, dst []byte) (f Flow) { + f.slen = len(src) + f.dlen = len(dst) + if f.slen > MaxEndpointSize || f.dlen > MaxEndpointSize { + panic("flow raw byte length greater than MaxEndpointSize") + } + f.typ = t + copy(f.src[:], src) + copy(f.dst[:], dst) + return +} + +// EndpointInvalid is an endpoint type used for invalid endpoints, IE endpoints +// that are specified incorrectly during creation. +var EndpointInvalid = RegisterEndpointType(0, EndpointTypeMetadata{Name: "invalid", Formatter: func(b []byte) string { + return fmt.Sprintf("%v", b) +}}) + +// InvalidEndpoint is a singleton Endpoint of type EndpointInvalid. +var InvalidEndpoint = NewEndpoint(EndpointInvalid, nil) + +// InvalidFlow is a singleton Flow of type EndpointInvalid. +var InvalidFlow = NewFlow(EndpointInvalid, nil, nil) diff --git a/backend/vendor/github.com/google/gopacket/gc b/backend/vendor/github.com/google/gopacket/gc new file mode 100644 index 0000000..b1d8d2e --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/gc @@ -0,0 +1,288 @@ +#!/bin/bash +# Copyright 2012 Google, Inc. All rights reserved. + +# This script provides a simple way to run benchmarks against previous code and +# keep a log of how benchmarks change over time. When used with the --benchmark +# flag, it runs benchmarks from the current code and from the last commit run +# with --benchmark, then stores the results in the git commit description. We +# rerun the old benchmarks along with the new ones, since there's no guarantee +# that git commits will happen on the same machine, so machine differences could +# cause wildly inaccurate results. +# +# If you're making changes to 'gopacket' which could cause performance changes, +# you may be requested to use this commit script to make sure your changes don't +# have large detrimental effects (or to show off how awesome your performance +# improvements are). +# +# If not run with the --benchmark flag, this script is still very useful... it +# makes sure all the correct go formatting, building, and testing work as +# expected. + +function Usage { + cat < + +--benchmark: Run benchmark comparisons against last benchmark'd commit +--root: Run tests that require root priviledges +--gen: Generate code for MACs/ports by pulling down external data + +Note, some 'git commit' flags are necessary, if all else fails, pass in -a +EOF + exit 1 +} + +BENCH="" +GEN="" +ROOT="" +while [ ! -z "$1" ]; do + case "$1" in + "--benchmark") + BENCH="$2" + shift + shift + ;; + "--gen") + GEN="yes" + shift + ;; + "--root") + ROOT="yes" + shift + ;; + "--help") + Usage + ;; + "-h") + Usage + ;; + "help") + Usage + ;; + *) + break + ;; + esac +done + +function Root { + if [ ! -z "$ROOT" ]; then + local exec="$1" + # Some folks (like me) keep source code in places inaccessible by root (like + # NFS), so to make sure things run smoothly we copy them to a /tmp location. + local tmpfile="$(mktemp -t gopacket_XXXXXXXX)" + echo "Running root test executable $exec as $tmpfile" + cp "$exec" "$tmpfile" + chmod a+x "$tmpfile" + shift + sudo "$tmpfile" "$@" + fi +} + +if [ "$#" -eq "0" ]; then + Usage +fi + +cd $(dirname $0) + +# Check for copyright notices. +for filename in $(find ./ -type f -name '*.go'); do + if ! head -n 1 "$filename" | grep -q Copyright; then + echo "File '$filename' may not have copyright notice" + exit 1 + fi +done + +set -e +set -x + +if [ ! -z "$ROOT" ]; then + echo "Running SUDO to get root priviledges for root tests" + sudo echo "have root" +fi + +if [ ! -z "$GEN" ]; then + pushd macs + go run gen.go | gofmt > valid_mac_prefixes.go + popd + pushd layers + go run gen.go | gofmt > iana_ports.go + go run gen2.go | gofmt > enums_generated.go + popd +fi + +# Make sure everything is formatted, compiles, and tests pass. +go fmt ./... +go test -i ./... 2>/dev/null >/dev/null || true +go test +go build +pushd examples/bytediff +go build +popd +if [ -f /usr/include/pcap.h ]; then + pushd pcap + go test ./... + go build ./... + go build pcap_tester.go + Root pcap_tester --mode=basic + Root pcap_tester --mode=filtered + Root pcap_tester --mode=timestamp || echo "You might not support timestamp sources" + popd + pushd examples/afpacket + go build + popd + pushd examples/pcapdump + go build + popd + pushd examples/arpscan + go build + popd + pushd examples/bidirectional + go build + popd + pushd examples/synscan + go build + popd + pushd examples/httpassembly + go build + popd + pushd examples/statsassembly + go build + popd +fi +pushd macs +go test ./... +gofmt -w gen.go +go build gen.go +popd +pushd tcpassembly +go test ./... +popd +pushd reassembly +go test ./... +popd +pushd layers +gofmt -w gen.go +go build gen.go +go test ./... +popd +pushd pcapgo +go test ./... +go build ./... +popd +if [ -f /usr/include/linux/if_packet.h ]; then + if grep -q TPACKET_V3 /usr/include/linux/if_packet.h; then + pushd afpacket + go build ./... + go test ./... + popd + fi +fi +if [ -f /usr/include/pfring.h ]; then + pushd pfring + go test ./... + go build ./... + popd + pushd examples/pfdump + go build + popd +fi +pushd ip4defrag +go test ./... +popd +pushd defrag +go test ./... +popd + +for travis_script in `ls .travis.*.sh`; do + ./$travis_script +done + +# Run our initial commit +git commit "$@" + +if [ -z "$BENCH" ]; then + set +x + echo "We're not benchmarking and we've committed... we're done!" + exit +fi + +### If we get here, we want to run benchmarks from current commit, and compare +### then to benchmarks from the last --benchmark commit. + +# Get our current branch. +BRANCH="$(git branch | grep '^*' | awk '{print $2}')" + +# File we're going to build our commit description in. +COMMIT_FILE="$(mktemp /tmp/tmp.XXXXXXXX)" + +# Add the word "BENCH" to the start of the git commit. +echo -n "BENCH " > $COMMIT_FILE + +# Get the current description... there must be an easier way. +git log -n 1 | grep '^ ' | sed 's/^ //' >> $COMMIT_FILE + +# Get the commit sha for the last benchmark commit +PREV=$(git log -n 1 --grep='BENCHMARK_MARKER_DO_NOT_CHANGE' | head -n 1 | awk '{print $2}') + +## Run current benchmarks + +cat >> $COMMIT_FILE <&1 | tee -a $COMMIT_FILE +pushd layers +go test --test.bench="$BENCH" 2>&1 | tee -a $COMMIT_FILE +popd +cat >> $COMMIT_FILE <&1 | tee -a $COMMIT_FILE +fi + + + +## Reset to last benchmark commit, run benchmarks + +git checkout $PREV + +cat >> $COMMIT_FILE <&1 | tee -a $COMMIT_FILE +pushd layers +go test --test.bench="$BENCH" 2>&1 | tee -a $COMMIT_FILE +popd +cat >> $COMMIT_FILE <&1 | tee -a $COMMIT_FILE +fi + + + +## Reset back to the most recent commit, edit the commit message by appending +## benchmark results. +git checkout $BRANCH +git commit --amend -F $COMMIT_FILE diff --git a/backend/vendor/github.com/google/gopacket/layerclass.go b/backend/vendor/github.com/google/gopacket/layerclass.go new file mode 100644 index 0000000..775cd09 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layerclass.go @@ -0,0 +1,107 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package gopacket + +// LayerClass is a set of LayerTypes, used for grabbing one of a number of +// different types from a packet. +type LayerClass interface { + // Contains returns true if the given layer type should be considered part + // of this layer class. + Contains(LayerType) bool + // LayerTypes returns the set of all layer types in this layer class. + // Note that this may not be a fast operation on all LayerClass + // implementations. + LayerTypes() []LayerType +} + +// Contains implements LayerClass. +func (l LayerType) Contains(a LayerType) bool { + return l == a +} + +// LayerTypes implements LayerClass. +func (l LayerType) LayerTypes() []LayerType { + return []LayerType{l} +} + +// LayerClassSlice implements a LayerClass with a slice. +type LayerClassSlice []bool + +// Contains returns true if the given layer type should be considered part +// of this layer class. +func (s LayerClassSlice) Contains(t LayerType) bool { + return int(t) < len(s) && s[t] +} + +// LayerTypes returns all layer types in this LayerClassSlice. +// Because of LayerClassSlice's implementation, this could be quite slow. +func (s LayerClassSlice) LayerTypes() (all []LayerType) { + for i := 0; i < len(s); i++ { + if s[i] { + all = append(all, LayerType(i)) + } + } + return +} + +// NewLayerClassSlice creates a new LayerClassSlice by creating a slice of +// size max(types) and setting slice[t] to true for each type t. Note, if +// you implement your own LayerType and give it a high value, this WILL create +// a very large slice. +func NewLayerClassSlice(types []LayerType) LayerClassSlice { + var max LayerType + for _, typ := range types { + if typ > max { + max = typ + } + } + t := make([]bool, int(max+1)) + for _, typ := range types { + t[typ] = true + } + return t +} + +// LayerClassMap implements a LayerClass with a map. +type LayerClassMap map[LayerType]bool + +// Contains returns true if the given layer type should be considered part +// of this layer class. +func (m LayerClassMap) Contains(t LayerType) bool { + return m[t] +} + +// LayerTypes returns all layer types in this LayerClassMap. +func (m LayerClassMap) LayerTypes() (all []LayerType) { + for t := range m { + all = append(all, t) + } + return +} + +// NewLayerClassMap creates a LayerClassMap and sets map[t] to true for each +// type in types. +func NewLayerClassMap(types []LayerType) LayerClassMap { + m := LayerClassMap{} + for _, typ := range types { + m[typ] = true + } + return m +} + +// NewLayerClass creates a LayerClass, attempting to be smart about which type +// it creates based on which types are passed in. +func NewLayerClass(types []LayerType) LayerClass { + for _, typ := range types { + if typ > maxLayerType { + // NewLayerClassSlice could create a very large object, so instead create + // a map. + return NewLayerClassMap(types) + } + } + return NewLayerClassSlice(types) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/.lint_blacklist b/backend/vendor/github.com/google/gopacket/layers/.lint_blacklist new file mode 100644 index 0000000..fded4f6 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/.lint_blacklist @@ -0,0 +1,39 @@ +dot11.go +eap.go +endpoints.go +enums_generated.go +enums.go +ethernet.go +geneve.go +icmp4.go +icmp6.go +igmp.go +ip4.go +ip6.go +layertypes.go +linux_sll.go +llc.go +lldp.go +mpls.go +ndp.go +ntp.go +ospf.go +pflog.go +pppoe.go +prism.go +radiotap.go +rudp.go +sctp.go +sflow.go +tcp.go +tcpip.go +tls.go +tls_alert.go +tls_appdata.go +tls_cipherspec.go +tls_hanshake.go +tls_test.go +udp.go +udplite.go +usb.go +vrrp.go diff --git a/backend/vendor/github.com/google/gopacket/layers/arp.go b/backend/vendor/github.com/google/gopacket/layers/arp.go new file mode 100644 index 0000000..0775ac0 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/arp.go @@ -0,0 +1,118 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// Copyright 2009-2011 Andreas Krennmair. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + + "github.com/google/gopacket" +) + +// Potential values for ARP.Operation. +const ( + ARPRequest = 1 + ARPReply = 2 +) + +// ARP is a ARP packet header. +type ARP struct { + BaseLayer + AddrType LinkType + Protocol EthernetType + HwAddressSize uint8 + ProtAddressSize uint8 + Operation uint16 + SourceHwAddress []byte + SourceProtAddress []byte + DstHwAddress []byte + DstProtAddress []byte +} + +// LayerType returns LayerTypeARP +func (arp *ARP) LayerType() gopacket.LayerType { return LayerTypeARP } + +// DecodeFromBytes decodes the given bytes into this layer. +func (arp *ARP) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 8 { + df.SetTruncated() + return fmt.Errorf("ARP length %d too short", len(data)) + } + arp.AddrType = LinkType(binary.BigEndian.Uint16(data[0:2])) + arp.Protocol = EthernetType(binary.BigEndian.Uint16(data[2:4])) + arp.HwAddressSize = data[4] + arp.ProtAddressSize = data[5] + arp.Operation = binary.BigEndian.Uint16(data[6:8]) + arpLength := 8 + 2*arp.HwAddressSize + 2*arp.ProtAddressSize + if len(data) < int(arpLength) { + df.SetTruncated() + return fmt.Errorf("ARP length %d too short, %d expected", len(data), arpLength) + } + arp.SourceHwAddress = data[8 : 8+arp.HwAddressSize] + arp.SourceProtAddress = data[8+arp.HwAddressSize : 8+arp.HwAddressSize+arp.ProtAddressSize] + arp.DstHwAddress = data[8+arp.HwAddressSize+arp.ProtAddressSize : 8+2*arp.HwAddressSize+arp.ProtAddressSize] + arp.DstProtAddress = data[8+2*arp.HwAddressSize+arp.ProtAddressSize : 8+2*arp.HwAddressSize+2*arp.ProtAddressSize] + + arp.Contents = data[:arpLength] + arp.Payload = data[arpLength:] + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (arp *ARP) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + size := 8 + len(arp.SourceHwAddress) + len(arp.SourceProtAddress) + len(arp.DstHwAddress) + len(arp.DstProtAddress) + bytes, err := b.PrependBytes(size) + if err != nil { + return err + } + if opts.FixLengths { + if len(arp.SourceHwAddress) != len(arp.DstHwAddress) { + return errors.New("mismatched hardware address sizes") + } + arp.HwAddressSize = uint8(len(arp.SourceHwAddress)) + if len(arp.SourceProtAddress) != len(arp.DstProtAddress) { + return errors.New("mismatched prot address sizes") + } + arp.ProtAddressSize = uint8(len(arp.SourceProtAddress)) + } + binary.BigEndian.PutUint16(bytes, uint16(arp.AddrType)) + binary.BigEndian.PutUint16(bytes[2:], uint16(arp.Protocol)) + bytes[4] = arp.HwAddressSize + bytes[5] = arp.ProtAddressSize + binary.BigEndian.PutUint16(bytes[6:], arp.Operation) + start := 8 + for _, addr := range [][]byte{ + arp.SourceHwAddress, + arp.SourceProtAddress, + arp.DstHwAddress, + arp.DstProtAddress, + } { + copy(bytes[start:], addr) + start += len(addr) + } + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (arp *ARP) CanDecode() gopacket.LayerClass { + return LayerTypeARP +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (arp *ARP) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +func decodeARP(data []byte, p gopacket.PacketBuilder) error { + + arp := &ARP{} + return decodingLayerDecoder(arp, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/asf.go b/backend/vendor/github.com/google/gopacket/layers/asf.go new file mode 100644 index 0000000..d698bd0 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/asf.go @@ -0,0 +1,166 @@ +// Copyright 2019 The GoPacket Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style license that can be found +// in the LICENSE file in the root of the source tree. + +package layers + +// This file implements the ASF RMCP payload specified in section 3.2.2.3 of +// https://www.dmtf.org/sites/default/files/standards/documents/DSP0136.pdf + +import ( + "encoding/binary" + "fmt" + + "github.com/google/gopacket" +) + +const ( + // ASFRMCPEnterprise is the IANA-assigned Enterprise Number of the ASF-RMCP. + ASFRMCPEnterprise uint32 = 4542 +) + +// ASFDataIdentifier encapsulates fields used to uniquely identify the format of +// the data block. +// +// While the enterprise number is almost always 4542 (ASF-RMCP), we support +// registering layers using structs of this type as a key in case any users are +// using OEM-extensions. +type ASFDataIdentifier struct { + + // Enterprise is the IANA Enterprise Number associated with the entity that + // defines the message type. A list can be found at + // https://www.iana.org/assignments/enterprise-numbers/enterprise-numbers. + // This can be thought of as the namespace for the message type. + Enterprise uint32 + + // Type is the message type, defined by the entity associated with the + // enterprise above. No pressure, but in the context of EN 4542, 1 byte is + // the difference between sending a ping and telling a machine to do an + // unconditional power down (0x80 and 0x12 respectively). + Type uint8 +} + +// LayerType returns the payload layer type corresponding to an ASF message +// type. +func (a ASFDataIdentifier) LayerType() gopacket.LayerType { + if lt := asfDataLayerTypes[a]; lt != 0 { + return lt + } + + // some layer types don't have a payload, e.g. ASF-RMCP Presence Ping. + return gopacket.LayerTypePayload +} + +// RegisterASFLayerType allows specifying that the data block of ASF packets +// with a given enterprise number and type should be processed by a given layer +// type. This overrides any existing registrations, including defaults. +func RegisterASFLayerType(a ASFDataIdentifier, l gopacket.LayerType) { + asfDataLayerTypes[a] = l +} + +var ( + // ASFDataIdentifierPresencePong is the message type of the response to a + // Presence Ping message. It indicates the sender is ASF-RMCP-aware. + ASFDataIdentifierPresencePong = ASFDataIdentifier{ + Enterprise: ASFRMCPEnterprise, + Type: 0x40, + } + + // ASFDataIdentifierPresencePing is a message type sent to a managed client + // to solicit a Presence Pong response. Clients may ignore this if the RMCP + // version is unsupported. Sending this message with a sequence number <255 + // is the recommended way of finding out whether an implementation sends + // RMCP ACKs (e.g. iDRAC does, Super Micro does not). + // + // Systems implementing IPMI must respond to this ping to conform to the + // spec, so it is a good substitute for an ICMP ping. + ASFDataIdentifierPresencePing = ASFDataIdentifier{ + Enterprise: ASFRMCPEnterprise, + Type: 0x80, + } + + // asfDataLayerTypes is used to find the next layer for a given ASF header. + asfDataLayerTypes = map[ASFDataIdentifier]gopacket.LayerType{ + ASFDataIdentifierPresencePong: LayerTypeASFPresencePong, + } +) + +// ASF defines ASF's generic RMCP message Data block format. See section +// 3.2.2.3. +type ASF struct { + BaseLayer + ASFDataIdentifier + + // Tag is used to match request/response pairs. The tag of a response is set + // to that of the message it is responding to. If a message is + // unidirectional, i.e. not part of a request/response pair, this is set to + // 255. + Tag uint8 + + // 1 byte reserved, set to 0x00. + + // Length is the length of this layer's payload in bytes. + Length uint8 +} + +// LayerType returns LayerTypeASF. It partially satisfies Layer and +// SerializableLayer. +func (*ASF) LayerType() gopacket.LayerType { + return LayerTypeASF +} + +// CanDecode returns LayerTypeASF. It partially satisfies DecodingLayer. +func (a *ASF) CanDecode() gopacket.LayerClass { + return a.LayerType() +} + +// DecodeFromBytes makes the layer represent the provided bytes. It partially +// satisfies DecodingLayer. +func (a *ASF) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 8 { + df.SetTruncated() + return fmt.Errorf("invalid ASF data header, length %v less than 8", + len(data)) + } + + a.BaseLayer.Contents = data[:8] + a.BaseLayer.Payload = data[8:] + + a.Enterprise = binary.BigEndian.Uint32(data[:4]) + a.Type = uint8(data[4]) + a.Tag = uint8(data[5]) + // 1 byte reserved + a.Length = uint8(data[7]) + return nil +} + +// NextLayerType returns the layer type corresponding to the message type of +// this ASF data layer. This partially satisfies DecodingLayer. +func (a *ASF) NextLayerType() gopacket.LayerType { + return a.ASFDataIdentifier.LayerType() +} + +// SerializeTo writes the serialized fom of this layer into the SerializeBuffer, +// partially satisfying SerializableLayer. +func (a *ASF) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + payload := b.Bytes() + bytes, err := b.PrependBytes(8) + if err != nil { + return err + } + binary.BigEndian.PutUint32(bytes[:4], a.Enterprise) + bytes[4] = uint8(a.Type) + bytes[5] = a.Tag + bytes[6] = 0x00 + if opts.FixLengths { + a.Length = uint8(len(payload)) + } + bytes[7] = a.Length + return nil +} + +// decodeASF decodes the byte slice into an RMCP-ASF data struct. +func decodeASF(data []byte, p gopacket.PacketBuilder) error { + return decodingLayerDecoder(&ASF{}, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/asf_presencepong.go b/backend/vendor/github.com/google/gopacket/layers/asf_presencepong.go new file mode 100644 index 0000000..e9a8baf --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/asf_presencepong.go @@ -0,0 +1,194 @@ +// Copyright 2019 The GoPacket Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style license that can be found +// in the LICENSE file in the root of the source tree. + +package layers + +// This file implements the RMCP ASF Presence Pong message, specified in section +// 3.2.4.3 of +// https://www.dmtf.org/sites/default/files/standards/documents/DSP0136.pdf. It +// also contains non-competing elements from IPMI v2.0, specified in section +// 13.2.4 of +// https://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/ipmi-intelligent-platform-mgt-interface-spec-2nd-gen-v2-0-spec-update.pdf. + +import ( + "encoding/binary" + "fmt" + + "github.com/google/gopacket" +) + +type ( + // ASFEntity is the type of individual entities that a Presence Pong + // response can indicate support of. The entities currently implemented by + // the spec are IPMI and ASFv1. + ASFEntity uint8 + + // ASFInteraction is the type of individual interactions that a Presence + // Pong response can indicate support for. The interactions currently + // implemented by the spec are RMCP security extensions. Although not + // specified, IPMI uses this field to indicate support for DASH, which is + // supported as well. + ASFInteraction uint8 +) + +const ( + // ASFDCMIEnterprise is the IANA-assigned Enterprise Number of the Data + // Center Manageability Interface Forum. The Presence Pong response's + // Enterprise field being set to this value indicates support for DCMI. The + // DCMI spec regards the OEM field as reserved, so these should be null. + ASFDCMIEnterprise uint32 = 36465 + + // ASFPresencePongEntityIPMI ANDs with Presence Pong's supported entities + // field if the managed system supports IPMI. + ASFPresencePongEntityIPMI ASFEntity = 1 << 7 + + // ASFPresencePongEntityASFv1 ANDs with Presence Pong's supported entities + // field if the managed system supports ASF v1.0. + ASFPresencePongEntityASFv1 ASFEntity = 1 + + // ASFPresencePongInteractionSecurityExtensions ANDs with Presence Pong's + // supported interactions field if the managed system supports RMCP v2.0 + // security extensions. See section 3.2.3. + ASFPresencePongInteractionSecurityExtensions ASFInteraction = 1 << 7 + + // ASFPresencePongInteractionDASH ANDs with Presence Pong's supported + // interactions field if the managed system supports DMTF DASH. See + // https://www.dmtf.org/standards/dash. + ASFPresencePongInteractionDASH ASFInteraction = 1 << 5 +) + +// ASFPresencePong defines the structure of a Presence Pong message's payload. +// See section 3.2.4.3. +type ASFPresencePong struct { + BaseLayer + + // Enterprise is the IANA Enterprise Number of an entity that has defined + // OEM-specific capabilities for the managed client. If no such capabilities + // exist, this is set to ASF's IANA Enterprise Number. + Enterprise uint32 + + // OEM identifies OEM-specific capabilities. Its structure is defined by the + // OEM. This is set to 0s if no OEM-specific capabilities exist. This + // implementation does not change byte order from the wire for this field. + OEM [4]byte + + // We break out entities and interactions into separate booleans as + // discovery is the entire point of this type of message, so we assume they + // are accessed. It also makes gopacket's default layer printing more + // useful. + + // IPMI is true if IPMI is supported by the managed system. There is no + // explicit version in the specification, however given the dates, this is + // assumed to be IPMI v1.0. Support for IPMI is contained in the "supported + // entities" field of the presence pong payload. + IPMI bool + + // ASFv1 indicates support for ASF v1.0. This seems somewhat redundant as + // ASF must be supported in order to receive a response. This is contained + // in the "supported entities" field of the presence pong payload. + ASFv1 bool + + // SecurityExtensions indicates support for RMCP Security Extensions, + // specified in ASF v2.0. This will always be false for v1.x + // implementations. This is contained in the "supported interactions" field + // of the presence pong payload. This field is defined in ASF v1.0, but has + // no useful value. + SecurityExtensions bool + + // DASH is true if DMTF DASH is supported. This is not specified in ASF + // v2.0, but in IPMI v2.0, however the former does not preclude it, so we + // support it. + DASH bool + + // 6 bytes reserved after the entities and interactions fields, set to 0s. +} + +// SupportsDCMI returns whether the Presence Pong message indicates support for +// the Data Center Management Interface, which is an extension of IPMI v2.0. +func (a *ASFPresencePong) SupportsDCMI() bool { + return a.Enterprise == ASFDCMIEnterprise && a.IPMI && a.ASFv1 +} + +// LayerType returns LayerTypeASFPresencePong. It partially satisfies Layer and +// SerializableLayer. +func (*ASFPresencePong) LayerType() gopacket.LayerType { + return LayerTypeASFPresencePong +} + +// CanDecode returns LayerTypeASFPresencePong. It partially satisfies +// DecodingLayer. +func (a *ASFPresencePong) CanDecode() gopacket.LayerClass { + return a.LayerType() +} + +// DecodeFromBytes makes the layer represent the provided bytes. It partially +// satisfies DecodingLayer. +func (a *ASFPresencePong) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 16 { + df.SetTruncated() + return fmt.Errorf("invalid ASF presence pong payload, length %v less than 16", + len(data)) + } + + a.BaseLayer.Contents = data[:16] + a.BaseLayer.Payload = data[16:] + + a.Enterprise = binary.BigEndian.Uint32(data[:4]) + copy(a.OEM[:], data[4:8]) // N.B. no byte order change + a.IPMI = data[8]&uint8(ASFPresencePongEntityIPMI) != 0 + a.ASFv1 = data[8]&uint8(ASFPresencePongEntityASFv1) != 0 + a.SecurityExtensions = data[9]&uint8(ASFPresencePongInteractionSecurityExtensions) != 0 + a.DASH = data[9]&uint8(ASFPresencePongInteractionDASH) != 0 + // ignore remaining 6 bytes; should be set to 0s + return nil +} + +// NextLayerType returns LayerTypePayload, as there are no further layers to +// decode. This partially satisfies DecodingLayer. +func (a *ASFPresencePong) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +// SerializeTo writes the serialized fom of this layer into the SerializeBuffer, +// partially satisfying SerializableLayer. +func (a *ASFPresencePong) SerializeTo(b gopacket.SerializeBuffer, _ gopacket.SerializeOptions) error { + bytes, err := b.PrependBytes(16) + if err != nil { + return err + } + + binary.BigEndian.PutUint32(bytes[:4], a.Enterprise) + + copy(bytes[4:8], a.OEM[:]) + + bytes[8] = 0 + if a.IPMI { + bytes[8] |= uint8(ASFPresencePongEntityIPMI) + } + if a.ASFv1 { + bytes[8] |= uint8(ASFPresencePongEntityASFv1) + } + + bytes[9] = 0 + if a.SecurityExtensions { + bytes[9] |= uint8(ASFPresencePongInteractionSecurityExtensions) + } + if a.DASH { + bytes[9] |= uint8(ASFPresencePongInteractionDASH) + } + + // zero-out remaining 6 bytes + for i := 10; i < len(bytes); i++ { + bytes[i] = 0x00 + } + + return nil +} + +// decodeASFPresencePong decodes the byte slice into an RMCP-ASF Presence Pong +// struct. +func decodeASFPresencePong(data []byte, p gopacket.PacketBuilder) error { + return decodingLayerDecoder(&ASFPresencePong{}, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/base.go b/backend/vendor/github.com/google/gopacket/layers/base.go new file mode 100644 index 0000000..cd59b46 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/base.go @@ -0,0 +1,52 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "github.com/google/gopacket" +) + +// BaseLayer is a convenience struct which implements the LayerData and +// LayerPayload functions of the Layer interface. +type BaseLayer struct { + // Contents is the set of bytes that make up this layer. IE: for an + // Ethernet packet, this would be the set of bytes making up the + // Ethernet frame. + Contents []byte + // Payload is the set of bytes contained by (but not part of) this + // Layer. Again, to take Ethernet as an example, this would be the + // set of bytes encapsulated by the Ethernet protocol. + Payload []byte +} + +// LayerContents returns the bytes of the packet layer. +func (b *BaseLayer) LayerContents() []byte { return b.Contents } + +// LayerPayload returns the bytes contained within the packet layer. +func (b *BaseLayer) LayerPayload() []byte { return b.Payload } + +type layerDecodingLayer interface { + gopacket.Layer + DecodeFromBytes([]byte, gopacket.DecodeFeedback) error + NextLayerType() gopacket.LayerType +} + +func decodingLayerDecoder(d layerDecodingLayer, data []byte, p gopacket.PacketBuilder) error { + err := d.DecodeFromBytes(data, p) + if err != nil { + return err + } + p.AddLayer(d) + next := d.NextLayerType() + if next == gopacket.LayerTypeZero { + return nil + } + return p.NextDecoder(next) +} + +// hacky way to zero out memory... there must be a better way? +var lotsOfZeros [1024]byte diff --git a/backend/vendor/github.com/google/gopacket/layers/bfd.go b/backend/vendor/github.com/google/gopacket/layers/bfd.go new file mode 100644 index 0000000..43030fb --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/bfd.go @@ -0,0 +1,481 @@ +// Copyright 2017 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. +// + +package layers + +import ( + "encoding/binary" + "errors" + + "github.com/google/gopacket" +) + +// BFD Control Packet Format +// ------------------------- +// The current version of BFD's RFC (RFC 5880) contains the following +// diagram for the BFD Control packet format: +// +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// |Vers | Diag |Sta|P|F|C|A|D|M| Detect Mult | Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | My Discriminator | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Your Discriminator | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Desired Min TX Interval | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Required Min RX Interval | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Required Min Echo RX Interval | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// +// An optional Authentication Section MAY be present: +// +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Auth Type | Auth Len | Authentication Data... | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// +// +// Simple Password Authentication Section Format +// --------------------------------------------- +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Auth Type | Auth Len | Auth Key ID | Password... | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | ... | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// +// +// Keyed MD5 and Meticulous Keyed MD5 Authentication Section Format +// ---------------------------------------------------------------- +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Auth Type | Auth Len | Auth Key ID | Reserved | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Sequence Number | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Auth Key/Digest... | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | ... | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// +// +// Keyed SHA1 and Meticulous Keyed SHA1 Authentication Section Format +// ------------------------------------------------------------------ +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Auth Type | Auth Len | Auth Key ID | Reserved | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Sequence Number | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Auth Key/Hash... | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | ... | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// +// From https://tools.ietf.org/rfc/rfc5880.txt +const bfdMinimumRecordSizeInBytes int = 24 + +// BFDVersion represents the version as decoded from the BFD control message +type BFDVersion uint8 + +// BFDDiagnostic represents diagnostic infomation about a BFD session +type BFDDiagnostic uint8 + +// constants that define BFDDiagnostic flags +const ( + BFDDiagnosticNone BFDDiagnostic = 0 // No Diagnostic + BFDDiagnosticTimeExpired BFDDiagnostic = 1 // Control Detection Time Expired + BFDDiagnosticEchoFailed BFDDiagnostic = 2 // Echo Function Failed + BFDDiagnosticNeighborSignalDown BFDDiagnostic = 3 // Neighbor Signaled Session Down + BFDDiagnosticForwardPlaneReset BFDDiagnostic = 4 // Forwarding Plane Reset + BFDDiagnosticPathDown BFDDiagnostic = 5 // Path Down + BFDDiagnosticConcatPathDown BFDDiagnostic = 6 // Concatenated Path Down + BFDDiagnosticAdminDown BFDDiagnostic = 7 // Administratively Down + BFDDiagnosticRevConcatPathDown BFDDiagnostic = 8 // Reverse Concatenated Path Dow +) + +// String returns a string version of BFDDiagnostic +func (bd BFDDiagnostic) String() string { + switch bd { + default: + return "Unknown" + case BFDDiagnosticNone: + return "None" + case BFDDiagnosticTimeExpired: + return "Control Detection Time Expired" + case BFDDiagnosticEchoFailed: + return "Echo Function Failed" + case BFDDiagnosticNeighborSignalDown: + return "Neighbor Signaled Session Down" + case BFDDiagnosticForwardPlaneReset: + return "Forwarding Plane Reset" + case BFDDiagnosticPathDown: + return "Path Down" + case BFDDiagnosticConcatPathDown: + return "Concatenated Path Down" + case BFDDiagnosticAdminDown: + return "Administratively Down" + case BFDDiagnosticRevConcatPathDown: + return "Reverse Concatenated Path Down" + } +} + +// BFDState represents the state of a BFD session +type BFDState uint8 + +// constants that define BFDState +const ( + BFDStateAdminDown BFDState = 0 + BFDStateDown BFDState = 1 + BFDStateInit BFDState = 2 + BFDStateUp BFDState = 3 +) + +// String returns a string version of BFDState +func (s BFDState) String() string { + switch s { + default: + return "Unknown" + case BFDStateAdminDown: + return "Admin Down" + case BFDStateDown: + return "Down" + case BFDStateInit: + return "Init" + case BFDStateUp: + return "Up" + } +} + +// BFDDetectMultiplier represents the negotiated transmit interval, +// multiplied by this value, provides the Detection Time for the +// receiving system in Asynchronous mode. +type BFDDetectMultiplier uint8 + +// BFDDiscriminator is a unique, nonzero discriminator value used +// to demultiplex multiple BFD sessions between the same pair of systems. +type BFDDiscriminator uint32 + +// BFDTimeInterval represents a time interval in microseconds +type BFDTimeInterval uint32 + +// BFDAuthType represents the authentication used in the BFD session +type BFDAuthType uint8 + +// constants that define the BFDAuthType +const ( + BFDAuthTypeNone BFDAuthType = 0 // No Auth + BFDAuthTypePassword BFDAuthType = 1 // Simple Password + BFDAuthTypeKeyedMD5 BFDAuthType = 2 // Keyed MD5 + BFDAuthTypeMeticulousKeyedMD5 BFDAuthType = 3 // Meticulous Keyed MD5 + BFDAuthTypeKeyedSHA1 BFDAuthType = 4 // Keyed SHA1 + BFDAuthTypeMeticulousKeyedSHA1 BFDAuthType = 5 // Meticulous Keyed SHA1 +) + +// String returns a string version of BFDAuthType +func (at BFDAuthType) String() string { + switch at { + default: + return "Unknown" + case BFDAuthTypeNone: + return "No Authentication" + case BFDAuthTypePassword: + return "Simple Password" + case BFDAuthTypeKeyedMD5: + return "Keyed MD5" + case BFDAuthTypeMeticulousKeyedMD5: + return "Meticulous Keyed MD5" + case BFDAuthTypeKeyedSHA1: + return "Keyed SHA1" + case BFDAuthTypeMeticulousKeyedSHA1: + return "Meticulous Keyed SHA1" + } +} + +// BFDAuthKeyID represents the authentication key ID in use for +// this packet. This allows multiple keys to be active simultaneously. +type BFDAuthKeyID uint8 + +// BFDAuthSequenceNumber represents the sequence number for this packet. +// For Keyed Authentication, this value is incremented occasionally. For +// Meticulous Keyed Authentication, this value is incremented for each +// successive packet transmitted for a session. This provides protection +// against replay attacks. +type BFDAuthSequenceNumber uint32 + +// BFDAuthData represents the authentication key or digest +type BFDAuthData []byte + +// BFDAuthHeader represents authentication data used in the BFD session +type BFDAuthHeader struct { + AuthType BFDAuthType + KeyID BFDAuthKeyID + SequenceNumber BFDAuthSequenceNumber + Data BFDAuthData +} + +// Length returns the data length of the BFDAuthHeader based on the +// authentication type +func (h *BFDAuthHeader) Length() int { + switch h.AuthType { + case BFDAuthTypePassword: + return 3 + len(h.Data) + case BFDAuthTypeKeyedMD5, BFDAuthTypeMeticulousKeyedMD5: + return 8 + len(h.Data) + case BFDAuthTypeKeyedSHA1, BFDAuthTypeMeticulousKeyedSHA1: + return 8 + len(h.Data) + default: + return 0 + } +} + +// BFD represents a BFD control message packet whose payload contains +// the control information required to for a BFD session. +// +// References +// ---------- +// +// Wikipedia's BFD entry: +// https://en.wikipedia.org/wiki/Bidirectional_Forwarding_Detection +// This is the best place to get an overview of BFD. +// +// RFC 5880 "Bidirectional Forwarding Detection (BFD)" (2010) +// https://tools.ietf.org/html/rfc5880 +// This is the original BFD specification. +// +// RFC 5881 "Bidirectional Forwarding Detection (BFD) for IPv4 and IPv6 (Single Hop)" (2010) +// https://tools.ietf.org/html/rfc5881 +// Describes the use of the Bidirectional Forwarding Detection (BFD) +// protocol over IPv4 and IPv6 for single IP hops. +type BFD struct { + BaseLayer // Stores the packet bytes and payload bytes. + + Version BFDVersion // Version of the BFD protocol. + Diagnostic BFDDiagnostic // Diagnostic code for last state change + State BFDState // Current state + Poll bool // Requesting verification + Final bool // Responding to a received BFD Control packet that had the Poll (P) bit set. + ControlPlaneIndependent bool // BFD implementation does not share fate with its control plane + AuthPresent bool // Authentication Section is present and the session is to be authenticated + Demand bool // Demand mode is active + Multipoint bool // For future point-to-multipoint extensions. Must always be zero + DetectMultiplier BFDDetectMultiplier // Detection time multiplier + MyDiscriminator BFDDiscriminator // A unique, nonzero discriminator value + YourDiscriminator BFDDiscriminator // discriminator received from the remote system. + DesiredMinTxInterval BFDTimeInterval // Minimum interval, in microseconds, the local system would like to use when transmitting BFD Control packets + RequiredMinRxInterval BFDTimeInterval // Minimum interval, in microseconds, between received BFD Control packets that this system is capable of supporting + RequiredMinEchoRxInterval BFDTimeInterval // Minimum interval, in microseconds, between received BFD Echo packets that this system is capable of supporting + AuthHeader *BFDAuthHeader // Authentication data, variable length. +} + +// Length returns the data length of a BFD Control message which +// changes based on the presence and type of authentication +// contained in the message +func (d *BFD) Length() int { + if d.AuthPresent && (d.AuthHeader != nil) { + return bfdMinimumRecordSizeInBytes + d.AuthHeader.Length() + } + + return bfdMinimumRecordSizeInBytes +} + +// LayerType returns the layer type of the BFD object, which is LayerTypeBFD. +func (d *BFD) LayerType() gopacket.LayerType { + return LayerTypeBFD +} + +// decodeBFD analyses a byte slice and attempts to decode it as a BFD +// control packet +// +// If it succeeds, it loads p with information about the packet and returns nil. +// If it fails, it returns an error (non nil). +// +// This function is employed in layertypes.go to register the BFD layer. +func decodeBFD(data []byte, p gopacket.PacketBuilder) error { + + // Attempt to decode the byte slice. + d := &BFD{} + err := d.DecodeFromBytes(data, p) + if err != nil { + return err + } + + // If the decoding worked, add the layer to the packet and set it + // as the application layer too, if there isn't already one. + p.AddLayer(d) + p.SetApplicationLayer(d) + + return nil +} + +// DecodeFromBytes analyses a byte slice and attempts to decode it as a BFD +// control packet. +// +// Upon succeeds, it loads the BFD object with information about the packet +// and returns nil. +// Upon failure, it returns an error (non nil). +func (d *BFD) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + + // If the data block is too short to be a BFD record, then return an error. + if len(data) < bfdMinimumRecordSizeInBytes { + df.SetTruncated() + return errors.New("BFD packet too short") + } + + pLen := uint8(data[3]) + if len(data) != int(pLen) { + return errors.New("BFD packet length does not match") + } + + // BFD type embeds type BaseLayer which contains two fields: + // Contents is supposed to contain the bytes of the data at this level. + // Payload is supposed to contain the payload of this level. + // Here we set the baselayer to be the bytes of the BFD record. + d.BaseLayer = BaseLayer{Contents: data[:len(data)]} + + // Extract the fields from the block of bytes. + // To make sense of this, refer to the packet diagram + // above and the section on endian conventions. + + // The first few fields are all packed into the first 32 bits. Unpack them. + d.Version = BFDVersion(((data[0] & 0xE0) >> 5)) + d.Diagnostic = BFDDiagnostic(data[0] & 0x1F) + data = data[1:] + + d.State = BFDState((data[0] & 0xC0) >> 6) + d.Poll = data[0]&0x20 != 0 + d.Final = data[0]&0x10 != 0 + d.ControlPlaneIndependent = data[0]&0x08 != 0 + d.AuthPresent = data[0]&0x04 != 0 + d.Demand = data[0]&0x02 != 0 + d.Multipoint = data[0]&0x01 != 0 + data = data[1:] + + data, d.DetectMultiplier = data[1:], BFDDetectMultiplier(data[0]) + data, _ = data[1:], uint8(data[0]) // Consume length + + // The remaining fields can just be copied in big endian order. + data, d.MyDiscriminator = data[4:], BFDDiscriminator(binary.BigEndian.Uint32(data[:4])) + data, d.YourDiscriminator = data[4:], BFDDiscriminator(binary.BigEndian.Uint32(data[:4])) + data, d.DesiredMinTxInterval = data[4:], BFDTimeInterval(binary.BigEndian.Uint32(data[:4])) + data, d.RequiredMinRxInterval = data[4:], BFDTimeInterval(binary.BigEndian.Uint32(data[:4])) + data, d.RequiredMinEchoRxInterval = data[4:], BFDTimeInterval(binary.BigEndian.Uint32(data[:4])) + + if d.AuthPresent && (len(data) > 2) { + d.AuthHeader = &BFDAuthHeader{} + data, d.AuthHeader.AuthType = data[1:], BFDAuthType(data[0]) + data, _ = data[1:], uint8(data[0]) // Consume length + data, d.AuthHeader.KeyID = data[1:], BFDAuthKeyID(data[0]) + + switch d.AuthHeader.AuthType { + case BFDAuthTypePassword: + d.AuthHeader.Data = BFDAuthData(data) + case BFDAuthTypeKeyedMD5, BFDAuthTypeMeticulousKeyedMD5: + // Skipped reserved byte + data, d.AuthHeader.SequenceNumber = data[5:], BFDAuthSequenceNumber(binary.BigEndian.Uint32(data[1:5])) + d.AuthHeader.Data = BFDAuthData(data) + case BFDAuthTypeKeyedSHA1, BFDAuthTypeMeticulousKeyedSHA1: + // Skipped reserved byte + data, d.AuthHeader.SequenceNumber = data[5:], BFDAuthSequenceNumber(binary.BigEndian.Uint32(data[1:5])) + d.AuthHeader.Data = BFDAuthData(data) + } + } + + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (d *BFD) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + data, err := b.PrependBytes(bfdMinimumRecordSizeInBytes) + if err != nil { + return err + } + + // Pack the first few fields into the first 32 bits. + data[0] = byte(byte(d.Version<<5) | byte(d.Diagnostic)) + h := uint8(0) + h |= (uint8(d.State) << 6) + h |= (uint8(bool2uint8(d.Poll)) << 5) + h |= (uint8(bool2uint8(d.Final)) << 4) + h |= (uint8(bool2uint8(d.ControlPlaneIndependent)) << 3) + h |= (uint8(bool2uint8(d.AuthPresent)) << 2) + h |= (uint8(bool2uint8(d.Demand)) << 1) + h |= uint8(bool2uint8(d.Multipoint)) + data[1] = byte(h) + data[2] = byte(d.DetectMultiplier) + data[3] = byte(d.Length()) + + // The remaining fields can just be copied in big endian order. + binary.BigEndian.PutUint32(data[4:], uint32(d.MyDiscriminator)) + binary.BigEndian.PutUint32(data[8:], uint32(d.YourDiscriminator)) + binary.BigEndian.PutUint32(data[12:], uint32(d.DesiredMinTxInterval)) + binary.BigEndian.PutUint32(data[16:], uint32(d.RequiredMinRxInterval)) + binary.BigEndian.PutUint32(data[20:], uint32(d.RequiredMinEchoRxInterval)) + + if d.AuthPresent && (d.AuthHeader != nil) { + auth, err := b.AppendBytes(int(d.AuthHeader.Length())) + if err != nil { + return err + } + + auth[0] = byte(d.AuthHeader.AuthType) + auth[1] = byte(d.AuthHeader.Length()) + auth[2] = byte(d.AuthHeader.KeyID) + + switch d.AuthHeader.AuthType { + case BFDAuthTypePassword: + copy(auth[3:], d.AuthHeader.Data) + case BFDAuthTypeKeyedMD5, BFDAuthTypeMeticulousKeyedMD5: + auth[3] = byte(0) + binary.BigEndian.PutUint32(auth[4:], uint32(d.AuthHeader.SequenceNumber)) + copy(auth[8:], d.AuthHeader.Data) + case BFDAuthTypeKeyedSHA1, BFDAuthTypeMeticulousKeyedSHA1: + auth[3] = byte(0) + binary.BigEndian.PutUint32(auth[4:], uint32(d.AuthHeader.SequenceNumber)) + copy(auth[8:], d.AuthHeader.Data) + } + } + + return nil +} + +// CanDecode returns a set of layers that BFD objects can decode. +// As BFD objects can only decide the BFD layer, we can return just that layer. +// Apparently a single layer type implements LayerClass. +func (d *BFD) CanDecode() gopacket.LayerClass { + return LayerTypeBFD +} + +// NextLayerType specifies the next layer that GoPacket should attempt to +// analyse after this (BFD) layer. As BFD packets do not contain any payload +// bytes, there are no further layers to analyse. +func (d *BFD) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypeZero +} + +// Payload returns an empty byte slice as BFD packets do not carry a payload +func (d *BFD) Payload() []byte { + return nil +} + +// bool2uint8 converts a bool to uint8 +func bool2uint8(b bool) uint8 { + if b { + return 1 + } + return 0 +} diff --git a/backend/vendor/github.com/google/gopacket/layers/cdp.go b/backend/vendor/github.com/google/gopacket/layers/cdp.go new file mode 100644 index 0000000..095f926 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/cdp.go @@ -0,0 +1,659 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +// Enum types courtesy of... +// http://search.cpan.org/~mchapman/Net-CDP-0.09/lib/Net/CDP.pm +// https://code.google.com/p/ladvd/ +// http://anonsvn.wireshark.org/viewvc/releases/wireshark-1.8.6/epan/dissectors/packet-cdp.c + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + "net" + + "github.com/google/gopacket" +) + +// CDPTLVType is the type of each TLV value in a CiscoDiscovery packet. +type CDPTLVType uint16 + +// CDPTLVType values. +const ( + CDPTLVDevID CDPTLVType = 0x0001 + CDPTLVAddress CDPTLVType = 0x0002 + CDPTLVPortID CDPTLVType = 0x0003 + CDPTLVCapabilities CDPTLVType = 0x0004 + CDPTLVVersion CDPTLVType = 0x0005 + CDPTLVPlatform CDPTLVType = 0x0006 + CDPTLVIPPrefix CDPTLVType = 0x0007 + CDPTLVHello CDPTLVType = 0x0008 + CDPTLVVTPDomain CDPTLVType = 0x0009 + CDPTLVNativeVLAN CDPTLVType = 0x000a + CDPTLVFullDuplex CDPTLVType = 0x000b + CDPTLVVLANReply CDPTLVType = 0x000e + CDPTLVVLANQuery CDPTLVType = 0x000f + CDPTLVPower CDPTLVType = 0x0010 + CDPTLVMTU CDPTLVType = 0x0011 + CDPTLVExtendedTrust CDPTLVType = 0x0012 + CDPTLVUntrustedCOS CDPTLVType = 0x0013 + CDPTLVSysName CDPTLVType = 0x0014 + CDPTLVSysOID CDPTLVType = 0x0015 + CDPTLVMgmtAddresses CDPTLVType = 0x0016 + CDPTLVLocation CDPTLVType = 0x0017 + CDPTLVExternalPortID CDPTLVType = 0x0018 + CDPTLVPowerRequested CDPTLVType = 0x0019 + CDPTLVPowerAvailable CDPTLVType = 0x001a + CDPTLVPortUnidirectional CDPTLVType = 0x001b + CDPTLVEnergyWise CDPTLVType = 0x001d + CDPTLVSparePairPOE CDPTLVType = 0x001f +) + +// CiscoDiscoveryValue is a TLV value inside a CiscoDiscovery packet layer. +type CiscoDiscoveryValue struct { + Type CDPTLVType + Length uint16 + Value []byte +} + +// CiscoDiscovery is a packet layer containing the Cisco Discovery Protocol. +// See http://www.cisco.com/univercd/cc/td/doc/product/lan/trsrb/frames.htm#31885 +type CiscoDiscovery struct { + BaseLayer + Version byte + TTL byte + Checksum uint16 + Values []CiscoDiscoveryValue +} + +// CDPCapability is the set of capabilities advertised by a CDP device. +type CDPCapability uint32 + +// CDPCapability values. +const ( + CDPCapMaskRouter CDPCapability = 0x0001 + CDPCapMaskTBBridge CDPCapability = 0x0002 + CDPCapMaskSPBridge CDPCapability = 0x0004 + CDPCapMaskSwitch CDPCapability = 0x0008 + CDPCapMaskHost CDPCapability = 0x0010 + CDPCapMaskIGMPFilter CDPCapability = 0x0020 + CDPCapMaskRepeater CDPCapability = 0x0040 + CDPCapMaskPhone CDPCapability = 0x0080 + CDPCapMaskRemote CDPCapability = 0x0100 +) + +// CDPCapabilities represents the capabilities of a device +type CDPCapabilities struct { + L3Router bool + TBBridge bool + SPBridge bool + L2Switch bool + IsHost bool + IGMPFilter bool + L1Repeater bool + IsPhone bool + RemotelyManaged bool +} + +// CDP Power-over-Ethernet values. +const ( + CDPPoEFourWire byte = 0x01 + CDPPoEPDArch byte = 0x02 + CDPPoEPDRequest byte = 0x04 + CDPPoEPSE byte = 0x08 +) + +// CDPSparePairPoE provides information on PoE. +type CDPSparePairPoE struct { + PSEFourWire bool // Supported / Not supported + PDArchShared bool // Shared / Independent + PDRequestOn bool // On / Off + PSEOn bool // On / Off +} + +// CDPVLANDialogue encapsulates a VLAN Query/Reply +type CDPVLANDialogue struct { + ID uint8 + VLAN uint16 +} + +// CDPPowerDialogue encapsulates a Power Query/Reply +type CDPPowerDialogue struct { + ID uint16 + MgmtID uint16 + Values []uint32 +} + +// CDPLocation provides location information for a CDP device. +type CDPLocation struct { + Type uint8 // Undocumented + Location string +} + +// CDPHello is a Cisco Hello message (undocumented, hence the "Unknown" fields) +type CDPHello struct { + OUI []byte + ProtocolID uint16 + ClusterMaster net.IP + Unknown1 net.IP + Version byte + SubVersion byte + Status byte + Unknown2 byte + ClusterCommander net.HardwareAddr + SwitchMAC net.HardwareAddr + Unknown3 byte + ManagementVLAN uint16 +} + +// CDPEnergyWiseSubtype is used within CDP to define TLV values. +type CDPEnergyWiseSubtype uint32 + +// CDPEnergyWiseSubtype values. +const ( + CDPEnergyWiseRole CDPEnergyWiseSubtype = 0x00000007 + CDPEnergyWiseDomain CDPEnergyWiseSubtype = 0x00000008 + CDPEnergyWiseName CDPEnergyWiseSubtype = 0x00000009 + CDPEnergyWiseReplyTo CDPEnergyWiseSubtype = 0x00000017 +) + +// CDPEnergyWise is used by CDP to monitor and control power usage. +type CDPEnergyWise struct { + EncryptedData []byte + Unknown1 uint32 + SequenceNumber uint32 + ModelNumber string + Unknown2 uint16 + HardwareID string + SerialNum string + Unknown3 []byte + Role string + Domain string + Name string + ReplyUnknown1 []byte + ReplyPort []byte + ReplyAddress []byte + ReplyUnknown2 []byte + ReplyUnknown3 []byte +} + +// CiscoDiscoveryInfo represents the decoded details for a set of CiscoDiscoveryValues +type CiscoDiscoveryInfo struct { + BaseLayer + CDPHello + DeviceID string + Addresses []net.IP + PortID string + Capabilities CDPCapabilities + Version string + Platform string + IPPrefixes []net.IPNet + VTPDomain string + NativeVLAN uint16 + FullDuplex bool + VLANReply CDPVLANDialogue + VLANQuery CDPVLANDialogue + PowerConsumption uint16 + MTU uint32 + ExtendedTrust uint8 + UntrustedCOS uint8 + SysName string + SysOID string + MgmtAddresses []net.IP + Location CDPLocation + PowerRequest CDPPowerDialogue + PowerAvailable CDPPowerDialogue + SparePairPoe CDPSparePairPoE + EnergyWise CDPEnergyWise + Unknown []CiscoDiscoveryValue +} + +// LayerType returns gopacket.LayerTypeCiscoDiscovery. +func (c *CiscoDiscovery) LayerType() gopacket.LayerType { + return LayerTypeCiscoDiscovery +} + +func decodeCiscoDiscovery(data []byte, p gopacket.PacketBuilder) error { + c := &CiscoDiscovery{ + Version: data[0], + TTL: data[1], + Checksum: binary.BigEndian.Uint16(data[2:4]), + } + if c.Version != 1 && c.Version != 2 { + return fmt.Errorf("Invalid CiscoDiscovery version number %d", c.Version) + } + var err error + c.Values, err = decodeCiscoDiscoveryTLVs(data[4:], p) + if err != nil { + return err + } + c.Contents = data[0:4] + c.Payload = data[4:] + p.AddLayer(c) + return p.NextDecoder(gopacket.DecodeFunc(decodeCiscoDiscoveryInfo)) +} + +// LayerType returns gopacket.LayerTypeCiscoDiscoveryInfo. +func (c *CiscoDiscoveryInfo) LayerType() gopacket.LayerType { + return LayerTypeCiscoDiscoveryInfo +} + +func decodeCiscoDiscoveryTLVs(data []byte, p gopacket.PacketBuilder) (values []CiscoDiscoveryValue, err error) { + for len(data) > 0 { + if len(data) < 4 { + p.SetTruncated() + return nil, errors.New("CDP TLV < 4 bytes") + } + val := CiscoDiscoveryValue{ + Type: CDPTLVType(binary.BigEndian.Uint16(data[:2])), + Length: binary.BigEndian.Uint16(data[2:4]), + } + if val.Length < 4 { + err = fmt.Errorf("Invalid CiscoDiscovery value length %d", val.Length) + break + } else if len(data) < int(val.Length) { + p.SetTruncated() + return nil, fmt.Errorf("CDP TLV < length %d", val.Length) + } + val.Value = data[4:val.Length] + values = append(values, val) + data = data[val.Length:] + } + return +} + +func decodeCiscoDiscoveryInfo(data []byte, p gopacket.PacketBuilder) error { + var err error + info := &CiscoDiscoveryInfo{BaseLayer: BaseLayer{Contents: data}} + p.AddLayer(info) + values, err := decodeCiscoDiscoveryTLVs(data, p) + if err != nil { // Unlikely, as parent decode will fail, but better safe... + return err + } + for _, val := range values { + switch val.Type { + case CDPTLVDevID: + info.DeviceID = string(val.Value) + case CDPTLVAddress: + if err = checkCDPTLVLen(val, 4); err != nil { + return err + } + info.Addresses, err = decodeAddresses(val.Value) + if err != nil { + return err + } + case CDPTLVPortID: + info.PortID = string(val.Value) + case CDPTLVCapabilities: + if err = checkCDPTLVLen(val, 4); err != nil { + return err + } + val := CDPCapability(binary.BigEndian.Uint32(val.Value[0:4])) + info.Capabilities.L3Router = (val&CDPCapMaskRouter > 0) + info.Capabilities.TBBridge = (val&CDPCapMaskTBBridge > 0) + info.Capabilities.SPBridge = (val&CDPCapMaskSPBridge > 0) + info.Capabilities.L2Switch = (val&CDPCapMaskSwitch > 0) + info.Capabilities.IsHost = (val&CDPCapMaskHost > 0) + info.Capabilities.IGMPFilter = (val&CDPCapMaskIGMPFilter > 0) + info.Capabilities.L1Repeater = (val&CDPCapMaskRepeater > 0) + info.Capabilities.IsPhone = (val&CDPCapMaskPhone > 0) + info.Capabilities.RemotelyManaged = (val&CDPCapMaskRemote > 0) + case CDPTLVVersion: + info.Version = string(val.Value) + case CDPTLVPlatform: + info.Platform = string(val.Value) + case CDPTLVIPPrefix: + v := val.Value + l := len(v) + if l%5 == 0 && l >= 5 { + for len(v) > 0 { + _, ipnet, _ := net.ParseCIDR(fmt.Sprintf("%d.%d.%d.%d/%d", v[0], v[1], v[2], v[3], v[4])) + info.IPPrefixes = append(info.IPPrefixes, *ipnet) + v = v[5:] + } + } else { + return fmt.Errorf("Invalid TLV %v length %d", val.Type, len(val.Value)) + } + case CDPTLVHello: + if err = checkCDPTLVLen(val, 32); err != nil { + return err + } + v := val.Value + info.CDPHello.OUI = v[0:3] + info.CDPHello.ProtocolID = binary.BigEndian.Uint16(v[3:5]) + info.CDPHello.ClusterMaster = v[5:9] + info.CDPHello.Unknown1 = v[9:13] + info.CDPHello.Version = v[13] + info.CDPHello.SubVersion = v[14] + info.CDPHello.Status = v[15] + info.CDPHello.Unknown2 = v[16] + info.CDPHello.ClusterCommander = v[17:23] + info.CDPHello.SwitchMAC = v[23:29] + info.CDPHello.Unknown3 = v[29] + info.CDPHello.ManagementVLAN = binary.BigEndian.Uint16(v[30:32]) + case CDPTLVVTPDomain: + info.VTPDomain = string(val.Value) + case CDPTLVNativeVLAN: + if err = checkCDPTLVLen(val, 2); err != nil { + return err + } + info.NativeVLAN = binary.BigEndian.Uint16(val.Value[0:2]) + case CDPTLVFullDuplex: + if err = checkCDPTLVLen(val, 1); err != nil { + return err + } + info.FullDuplex = (val.Value[0] == 1) + case CDPTLVVLANReply: + if err = checkCDPTLVLen(val, 3); err != nil { + return err + } + info.VLANReply.ID = uint8(val.Value[0]) + info.VLANReply.VLAN = binary.BigEndian.Uint16(val.Value[1:3]) + case CDPTLVVLANQuery: + if err = checkCDPTLVLen(val, 3); err != nil { + return err + } + info.VLANQuery.ID = uint8(val.Value[0]) + info.VLANQuery.VLAN = binary.BigEndian.Uint16(val.Value[1:3]) + case CDPTLVPower: + if err = checkCDPTLVLen(val, 2); err != nil { + return err + } + info.PowerConsumption = binary.BigEndian.Uint16(val.Value[0:2]) + case CDPTLVMTU: + if err = checkCDPTLVLen(val, 4); err != nil { + return err + } + info.MTU = binary.BigEndian.Uint32(val.Value[0:4]) + case CDPTLVExtendedTrust: + if err = checkCDPTLVLen(val, 1); err != nil { + return err + } + info.ExtendedTrust = uint8(val.Value[0]) + case CDPTLVUntrustedCOS: + if err = checkCDPTLVLen(val, 1); err != nil { + return err + } + info.UntrustedCOS = uint8(val.Value[0]) + case CDPTLVSysName: + info.SysName = string(val.Value) + case CDPTLVSysOID: + info.SysOID = string(val.Value) + case CDPTLVMgmtAddresses: + if err = checkCDPTLVLen(val, 4); err != nil { + return err + } + info.MgmtAddresses, err = decodeAddresses(val.Value) + if err != nil { + return err + } + case CDPTLVLocation: + if err = checkCDPTLVLen(val, 2); err != nil { + return err + } + info.Location.Type = uint8(val.Value[0]) + info.Location.Location = string(val.Value[1:]) + + // case CDPTLVLExternalPortID: + // Undocumented + case CDPTLVPowerRequested: + if err = checkCDPTLVLen(val, 4); err != nil { + return err + } + info.PowerRequest.ID = binary.BigEndian.Uint16(val.Value[0:2]) + info.PowerRequest.MgmtID = binary.BigEndian.Uint16(val.Value[2:4]) + for n := 4; n < len(val.Value); n += 4 { + info.PowerRequest.Values = append(info.PowerRequest.Values, binary.BigEndian.Uint32(val.Value[n:n+4])) + } + case CDPTLVPowerAvailable: + if err = checkCDPTLVLen(val, 4); err != nil { + return err + } + info.PowerAvailable.ID = binary.BigEndian.Uint16(val.Value[0:2]) + info.PowerAvailable.MgmtID = binary.BigEndian.Uint16(val.Value[2:4]) + for n := 4; n < len(val.Value); n += 4 { + info.PowerAvailable.Values = append(info.PowerAvailable.Values, binary.BigEndian.Uint32(val.Value[n:n+4])) + } + // case CDPTLVPortUnidirectional + // Undocumented + case CDPTLVEnergyWise: + if err = checkCDPTLVLen(val, 72); err != nil { + return err + } + info.EnergyWise.EncryptedData = val.Value[0:20] + info.EnergyWise.Unknown1 = binary.BigEndian.Uint32(val.Value[20:24]) + info.EnergyWise.SequenceNumber = binary.BigEndian.Uint32(val.Value[24:28]) + info.EnergyWise.ModelNumber = string(val.Value[28:44]) + info.EnergyWise.Unknown2 = binary.BigEndian.Uint16(val.Value[44:46]) + info.EnergyWise.HardwareID = string(val.Value[46:49]) + info.EnergyWise.SerialNum = string(val.Value[49:60]) + info.EnergyWise.Unknown3 = val.Value[60:68] + tlvLen := binary.BigEndian.Uint16(val.Value[68:70]) + tlvNum := binary.BigEndian.Uint16(val.Value[70:72]) + data := val.Value[72:] + if len(data) < int(tlvLen) { + return fmt.Errorf("Invalid TLV length %d vs %d", tlvLen, len(data)) + } + numSeen := 0 + for len(data) > 8 { + numSeen++ + if numSeen > int(tlvNum) { // Too many TLV's ? + return fmt.Errorf("Too many TLV's - wanted %d, saw %d", tlvNum, numSeen) + } + tType := CDPEnergyWiseSubtype(binary.BigEndian.Uint32(data[0:4])) + tLen := int(binary.BigEndian.Uint32(data[4:8])) + if tLen > len(data)-8 { + return fmt.Errorf("Invalid TLV length %d vs %d", tLen, len(data)-8) + } + data = data[8:] + switch tType { + case CDPEnergyWiseRole: + info.EnergyWise.Role = string(data[:]) + case CDPEnergyWiseDomain: + info.EnergyWise.Domain = string(data[:]) + case CDPEnergyWiseName: + info.EnergyWise.Name = string(data[:]) + case CDPEnergyWiseReplyTo: + if len(data) >= 18 { + info.EnergyWise.ReplyUnknown1 = data[0:2] + info.EnergyWise.ReplyPort = data[2:4] + info.EnergyWise.ReplyAddress = data[4:8] + info.EnergyWise.ReplyUnknown2 = data[8:10] + info.EnergyWise.ReplyUnknown3 = data[10:14] + } + } + data = data[tLen:] + } + case CDPTLVSparePairPOE: + if err = checkCDPTLVLen(val, 1); err != nil { + return err + } + v := val.Value[0] + info.SparePairPoe.PSEFourWire = (v&CDPPoEFourWire > 0) + info.SparePairPoe.PDArchShared = (v&CDPPoEPDArch > 0) + info.SparePairPoe.PDRequestOn = (v&CDPPoEPDRequest > 0) + info.SparePairPoe.PSEOn = (v&CDPPoEPSE > 0) + default: + info.Unknown = append(info.Unknown, val) + } + } + return nil +} + +// CDP Protocol Types +const ( + CDPProtocolTypeNLPID byte = 1 + CDPProtocolType802_2 byte = 2 +) + +// CDPAddressType is used to define TLV values within CDP addresses. +type CDPAddressType uint64 + +// CDP Address types. +const ( + CDPAddressTypeCLNP CDPAddressType = 0x81 + CDPAddressTypeIPV4 CDPAddressType = 0xcc + CDPAddressTypeIPV6 CDPAddressType = 0xaaaa030000000800 + CDPAddressTypeDECNET CDPAddressType = 0xaaaa030000006003 + CDPAddressTypeAPPLETALK CDPAddressType = 0xaaaa03000000809b + CDPAddressTypeIPX CDPAddressType = 0xaaaa030000008137 + CDPAddressTypeVINES CDPAddressType = 0xaaaa0300000080c4 + CDPAddressTypeXNS CDPAddressType = 0xaaaa030000000600 + CDPAddressTypeAPOLLO CDPAddressType = 0xaaaa030000008019 +) + +func decodeAddresses(v []byte) (addresses []net.IP, err error) { + numaddr := int(binary.BigEndian.Uint32(v[0:4])) + if numaddr < 1 { + return nil, fmt.Errorf("Invalid Address TLV number %d", numaddr) + } + v = v[4:] + if len(v) < numaddr*8 { + return nil, fmt.Errorf("Invalid Address TLV length %d", len(v)) + } + for i := 0; i < numaddr; i++ { + prottype := v[0] + if prottype != CDPProtocolTypeNLPID && prottype != CDPProtocolType802_2 { // invalid protocol type + return nil, fmt.Errorf("Invalid Address Protocol %d", prottype) + } + protlen := int(v[1]) + if (prottype == CDPProtocolTypeNLPID && protlen != 1) || + (prottype == CDPProtocolType802_2 && protlen != 3 && protlen != 8) { // invalid length + return nil, fmt.Errorf("Invalid Address Protocol length %d", protlen) + } + plen := make([]byte, 8) + copy(plen[8-protlen:], v[2:2+protlen]) + protocol := CDPAddressType(binary.BigEndian.Uint64(plen)) + v = v[2+protlen:] + addrlen := binary.BigEndian.Uint16(v[0:2]) + ab := v[2 : 2+addrlen] + if protocol == CDPAddressTypeIPV4 && addrlen == 4 { + addresses = append(addresses, net.IPv4(ab[0], ab[1], ab[2], ab[3])) + } else if protocol == CDPAddressTypeIPV6 && addrlen == 16 { + addresses = append(addresses, net.IP(ab)) + } else { + // only handle IPV4 & IPV6 for now + } + v = v[2+addrlen:] + if len(v) < 8 { + break + } + } + return +} + +func (t CDPTLVType) String() (s string) { + switch t { + case CDPTLVDevID: + s = "Device ID" + case CDPTLVAddress: + s = "Addresses" + case CDPTLVPortID: + s = "Port ID" + case CDPTLVCapabilities: + s = "Capabilities" + case CDPTLVVersion: + s = "Software Version" + case CDPTLVPlatform: + s = "Platform" + case CDPTLVIPPrefix: + s = "IP Prefix" + case CDPTLVHello: + s = "Protocol Hello" + case CDPTLVVTPDomain: + s = "VTP Management Domain" + case CDPTLVNativeVLAN: + s = "Native VLAN" + case CDPTLVFullDuplex: + s = "Full Duplex" + case CDPTLVVLANReply: + s = "VoIP VLAN Reply" + case CDPTLVVLANQuery: + s = "VLANQuery" + case CDPTLVPower: + s = "Power consumption" + case CDPTLVMTU: + s = "MTU" + case CDPTLVExtendedTrust: + s = "Extended Trust Bitmap" + case CDPTLVUntrustedCOS: + s = "Untrusted Port CoS" + case CDPTLVSysName: + s = "System Name" + case CDPTLVSysOID: + s = "System OID" + case CDPTLVMgmtAddresses: + s = "Management Addresses" + case CDPTLVLocation: + s = "Location" + case CDPTLVExternalPortID: + s = "External Port ID" + case CDPTLVPowerRequested: + s = "Power Requested" + case CDPTLVPowerAvailable: + s = "Power Available" + case CDPTLVPortUnidirectional: + s = "Port Unidirectional" + case CDPTLVEnergyWise: + s = "Energy Wise" + case CDPTLVSparePairPOE: + s = "Spare Pair POE" + default: + s = "Unknown" + } + return +} + +func (a CDPAddressType) String() (s string) { + switch a { + case CDPAddressTypeCLNP: + s = "Connectionless Network Protocol" + case CDPAddressTypeIPV4: + s = "IPv4" + case CDPAddressTypeIPV6: + s = "IPv6" + case CDPAddressTypeDECNET: + s = "DECnet Phase IV" + case CDPAddressTypeAPPLETALK: + s = "Apple Talk" + case CDPAddressTypeIPX: + s = "Novell IPX" + case CDPAddressTypeVINES: + s = "Banyan VINES" + case CDPAddressTypeXNS: + s = "Xerox Network Systems" + case CDPAddressTypeAPOLLO: + s = "Apollo" + default: + s = "Unknown" + } + return +} + +func (t CDPEnergyWiseSubtype) String() (s string) { + switch t { + case CDPEnergyWiseRole: + s = "Role" + case CDPEnergyWiseDomain: + s = "Domain" + case CDPEnergyWiseName: + s = "Name" + case CDPEnergyWiseReplyTo: + s = "ReplyTo" + default: + s = "Unknown" + } + return +} + +func checkCDPTLVLen(v CiscoDiscoveryValue, l int) (err error) { + if len(v.Value) < l { + err = fmt.Errorf("Invalid TLV %v length %d", v.Type, len(v.Value)) + } + return +} diff --git a/backend/vendor/github.com/google/gopacket/layers/ctp.go b/backend/vendor/github.com/google/gopacket/layers/ctp.go new file mode 100644 index 0000000..8287584 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/ctp.go @@ -0,0 +1,109 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "fmt" + "github.com/google/gopacket" +) + +// EthernetCTPFunction is the function code used by the EthernetCTP protocol to identify each +// EthernetCTP layer. +type EthernetCTPFunction uint16 + +// EthernetCTPFunction values. +const ( + EthernetCTPFunctionReply EthernetCTPFunction = 1 + EthernetCTPFunctionForwardData EthernetCTPFunction = 2 +) + +// EthernetCTP implements the EthernetCTP protocol, see http://www.mit.edu/people/jhawk/ctp.html. +// We split EthernetCTP up into the top-level EthernetCTP layer, followed by zero or more +// EthernetCTPForwardData layers, followed by a final EthernetCTPReply layer. +type EthernetCTP struct { + BaseLayer + SkipCount uint16 +} + +// LayerType returns gopacket.LayerTypeEthernetCTP. +func (c *EthernetCTP) LayerType() gopacket.LayerType { + return LayerTypeEthernetCTP +} + +// EthernetCTPForwardData is the ForwardData layer inside EthernetCTP. See EthernetCTP's docs for more +// details. +type EthernetCTPForwardData struct { + BaseLayer + Function EthernetCTPFunction + ForwardAddress []byte +} + +// LayerType returns gopacket.LayerTypeEthernetCTPForwardData. +func (c *EthernetCTPForwardData) LayerType() gopacket.LayerType { + return LayerTypeEthernetCTPForwardData +} + +// ForwardEndpoint returns the EthernetCTPForwardData ForwardAddress as an endpoint. +func (c *EthernetCTPForwardData) ForwardEndpoint() gopacket.Endpoint { + return gopacket.NewEndpoint(EndpointMAC, c.ForwardAddress) +} + +// EthernetCTPReply is the Reply layer inside EthernetCTP. See EthernetCTP's docs for more details. +type EthernetCTPReply struct { + BaseLayer + Function EthernetCTPFunction + ReceiptNumber uint16 + Data []byte +} + +// LayerType returns gopacket.LayerTypeEthernetCTPReply. +func (c *EthernetCTPReply) LayerType() gopacket.LayerType { + return LayerTypeEthernetCTPReply +} + +// Payload returns the EthernetCTP reply's Data bytes. +func (c *EthernetCTPReply) Payload() []byte { return c.Data } + +func decodeEthernetCTP(data []byte, p gopacket.PacketBuilder) error { + c := &EthernetCTP{ + SkipCount: binary.LittleEndian.Uint16(data[:2]), + BaseLayer: BaseLayer{data[:2], data[2:]}, + } + if c.SkipCount%2 != 0 { + return fmt.Errorf("EthernetCTP skip count is odd: %d", c.SkipCount) + } + p.AddLayer(c) + return p.NextDecoder(gopacket.DecodeFunc(decodeEthernetCTPFromFunctionType)) +} + +// decodeEthernetCTPFromFunctionType reads in the first 2 bytes to determine the EthernetCTP +// layer type to decode next, then decodes based on that. +func decodeEthernetCTPFromFunctionType(data []byte, p gopacket.PacketBuilder) error { + function := EthernetCTPFunction(binary.LittleEndian.Uint16(data[:2])) + switch function { + case EthernetCTPFunctionReply: + reply := &EthernetCTPReply{ + Function: function, + ReceiptNumber: binary.LittleEndian.Uint16(data[2:4]), + Data: data[4:], + BaseLayer: BaseLayer{data, nil}, + } + p.AddLayer(reply) + p.SetApplicationLayer(reply) + return nil + case EthernetCTPFunctionForwardData: + forward := &EthernetCTPForwardData{ + Function: function, + ForwardAddress: data[2:8], + BaseLayer: BaseLayer{data[:8], data[8:]}, + } + p.AddLayer(forward) + return p.NextDecoder(gopacket.DecodeFunc(decodeEthernetCTPFromFunctionType)) + } + return fmt.Errorf("Unknown EthernetCTP function type %v", function) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/dhcpv4.go b/backend/vendor/github.com/google/gopacket/layers/dhcpv4.go new file mode 100644 index 0000000..d79c591 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/dhcpv4.go @@ -0,0 +1,592 @@ +// Copyright 2016 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "bytes" + "encoding/binary" + "fmt" + "net" + + "github.com/google/gopacket" +) + +// DHCPOp rerprents a bootp operation +type DHCPOp byte + +// bootp operations +const ( + DHCPOpRequest DHCPOp = 1 + DHCPOpReply DHCPOp = 2 +) + +// String returns a string version of a DHCPOp. +func (o DHCPOp) String() string { + switch o { + case DHCPOpRequest: + return "Request" + case DHCPOpReply: + return "Reply" + default: + return "Unknown" + } +} + +// DHCPMsgType represents a DHCP operation +type DHCPMsgType byte + +// Constants that represent DHCP operations +const ( + DHCPMsgTypeUnspecified DHCPMsgType = iota + DHCPMsgTypeDiscover + DHCPMsgTypeOffer + DHCPMsgTypeRequest + DHCPMsgTypeDecline + DHCPMsgTypeAck + DHCPMsgTypeNak + DHCPMsgTypeRelease + DHCPMsgTypeInform +) + +// String returns a string version of a DHCPMsgType. +func (o DHCPMsgType) String() string { + switch o { + case DHCPMsgTypeUnspecified: + return "Unspecified" + case DHCPMsgTypeDiscover: + return "Discover" + case DHCPMsgTypeOffer: + return "Offer" + case DHCPMsgTypeRequest: + return "Request" + case DHCPMsgTypeDecline: + return "Decline" + case DHCPMsgTypeAck: + return "Ack" + case DHCPMsgTypeNak: + return "Nak" + case DHCPMsgTypeRelease: + return "Release" + case DHCPMsgTypeInform: + return "Inform" + default: + return "Unknown" + } +} + +//DHCPMagic is the RFC 2131 "magic cooke" for DHCP. +var DHCPMagic uint32 = 0x63825363 + +// DHCPv4 contains data for a single DHCP packet. +type DHCPv4 struct { + BaseLayer + Operation DHCPOp + HardwareType LinkType + HardwareLen uint8 + HardwareOpts uint8 + Xid uint32 + Secs uint16 + Flags uint16 + ClientIP net.IP + YourClientIP net.IP + NextServerIP net.IP + RelayAgentIP net.IP + ClientHWAddr net.HardwareAddr + ServerName []byte + File []byte + Options DHCPOptions +} + +// DHCPOptions is used to get nicely printed option lists which would normally +// be cut off after 5 options. +type DHCPOptions []DHCPOption + +// String returns a string version of the options list. +func (o DHCPOptions) String() string { + buf := &bytes.Buffer{} + buf.WriteByte('[') + for i, opt := range o { + buf.WriteString(opt.String()) + if i+1 != len(o) { + buf.WriteString(", ") + } + } + buf.WriteByte(']') + return buf.String() +} + +// LayerType returns gopacket.LayerTypeDHCPv4 +func (d *DHCPv4) LayerType() gopacket.LayerType { return LayerTypeDHCPv4 } + +// DecodeFromBytes decodes the given bytes into this layer. +func (d *DHCPv4) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 240 { + df.SetTruncated() + return fmt.Errorf("DHCPv4 length %d too short", len(data)) + } + d.Options = d.Options[:0] + d.Operation = DHCPOp(data[0]) + d.HardwareType = LinkType(data[1]) + d.HardwareLen = data[2] + d.HardwareOpts = data[3] + d.Xid = binary.BigEndian.Uint32(data[4:8]) + d.Secs = binary.BigEndian.Uint16(data[8:10]) + d.Flags = binary.BigEndian.Uint16(data[10:12]) + d.ClientIP = net.IP(data[12:16]) + d.YourClientIP = net.IP(data[16:20]) + d.NextServerIP = net.IP(data[20:24]) + d.RelayAgentIP = net.IP(data[24:28]) + d.ClientHWAddr = net.HardwareAddr(data[28 : 28+d.HardwareLen]) + d.ServerName = data[44:108] + d.File = data[108:236] + if binary.BigEndian.Uint32(data[236:240]) != DHCPMagic { + return InvalidMagicCookie + } + + if len(data) <= 240 { + // DHCP Packet could have no option (??) + return nil + } + + options := data[240:] + + stop := len(options) + start := 0 + for start < stop { + o := DHCPOption{} + if err := o.decode(options[start:]); err != nil { + return err + } + if o.Type == DHCPOptEnd { + break + } + d.Options = append(d.Options, o) + // Check if the option is a single byte pad + if o.Type == DHCPOptPad { + start++ + } else { + start += int(o.Length) + 2 + } + } + + d.Contents = data + + return nil +} + +// Len returns the length of a DHCPv4 packet. +func (d *DHCPv4) Len() uint16 { + n := uint16(240) + for _, o := range d.Options { + if o.Type == DHCPOptPad { + n++ + } else { + n += uint16(o.Length) + 2 + } + } + n++ // for opt end + return n +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (d *DHCPv4) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + plen := int(d.Len()) + + data, err := b.PrependBytes(plen) + if err != nil { + return err + } + + data[0] = byte(d.Operation) + data[1] = byte(d.HardwareType) + if opts.FixLengths { + d.HardwareLen = uint8(len(d.ClientHWAddr)) + } + data[2] = d.HardwareLen + data[3] = d.HardwareOpts + binary.BigEndian.PutUint32(data[4:8], d.Xid) + binary.BigEndian.PutUint16(data[8:10], d.Secs) + binary.BigEndian.PutUint16(data[10:12], d.Flags) + copy(data[12:16], d.ClientIP.To4()) + copy(data[16:20], d.YourClientIP.To4()) + copy(data[20:24], d.NextServerIP.To4()) + copy(data[24:28], d.RelayAgentIP.To4()) + copy(data[28:44], d.ClientHWAddr) + copy(data[44:108], d.ServerName) + copy(data[108:236], d.File) + binary.BigEndian.PutUint32(data[236:240], DHCPMagic) + + if len(d.Options) > 0 { + offset := 240 + for _, o := range d.Options { + if err := o.encode(data[offset:]); err != nil { + return err + } + // A pad option is only a single byte + if o.Type == DHCPOptPad { + offset++ + } else { + offset += 2 + len(o.Data) + } + } + optend := NewDHCPOption(DHCPOptEnd, nil) + if err := optend.encode(data[offset:]); err != nil { + return err + } + } + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (d *DHCPv4) CanDecode() gopacket.LayerClass { + return LayerTypeDHCPv4 +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (d *DHCPv4) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +func decodeDHCPv4(data []byte, p gopacket.PacketBuilder) error { + dhcp := &DHCPv4{} + err := dhcp.DecodeFromBytes(data, p) + if err != nil { + return err + } + p.AddLayer(dhcp) + return p.NextDecoder(gopacket.LayerTypePayload) +} + +// DHCPOpt represents a DHCP option or parameter from RFC-2132 +type DHCPOpt byte + +// Constants for the DHCPOpt options. +const ( + DHCPOptPad DHCPOpt = 0 + DHCPOptSubnetMask DHCPOpt = 1 // 4, net.IP + DHCPOptTimeOffset DHCPOpt = 2 // 4, int32 (signed seconds from UTC) + DHCPOptRouter DHCPOpt = 3 // n*4, [n]net.IP + DHCPOptTimeServer DHCPOpt = 4 // n*4, [n]net.IP + DHCPOptNameServer DHCPOpt = 5 // n*4, [n]net.IP + DHCPOptDNS DHCPOpt = 6 // n*4, [n]net.IP + DHCPOptLogServer DHCPOpt = 7 // n*4, [n]net.IP + DHCPOptCookieServer DHCPOpt = 8 // n*4, [n]net.IP + DHCPOptLPRServer DHCPOpt = 9 // n*4, [n]net.IP + DHCPOptImpressServer DHCPOpt = 10 // n*4, [n]net.IP + DHCPOptResLocServer DHCPOpt = 11 // n*4, [n]net.IP + DHCPOptHostname DHCPOpt = 12 // n, string + DHCPOptBootfileSize DHCPOpt = 13 // 2, uint16 + DHCPOptMeritDumpFile DHCPOpt = 14 // >1, string + DHCPOptDomainName DHCPOpt = 15 // n, string + DHCPOptSwapServer DHCPOpt = 16 // n*4, [n]net.IP + DHCPOptRootPath DHCPOpt = 17 // n, string + DHCPOptExtensionsPath DHCPOpt = 18 // n, string + DHCPOptIPForwarding DHCPOpt = 19 // 1, bool + DHCPOptSourceRouting DHCPOpt = 20 // 1, bool + DHCPOptPolicyFilter DHCPOpt = 21 // 8*n, [n]{net.IP/net.IP} + DHCPOptDatagramMTU DHCPOpt = 22 // 2, uint16 + DHCPOptDefaultTTL DHCPOpt = 23 // 1, byte + DHCPOptPathMTUAgingTimeout DHCPOpt = 24 // 4, uint32 + DHCPOptPathPlateuTableOption DHCPOpt = 25 // 2*n, []uint16 + DHCPOptInterfaceMTU DHCPOpt = 26 // 2, uint16 + DHCPOptAllSubsLocal DHCPOpt = 27 // 1, bool + DHCPOptBroadcastAddr DHCPOpt = 28 // 4, net.IP + DHCPOptMaskDiscovery DHCPOpt = 29 // 1, bool + DHCPOptMaskSupplier DHCPOpt = 30 // 1, bool + DHCPOptRouterDiscovery DHCPOpt = 31 // 1, bool + DHCPOptSolicitAddr DHCPOpt = 32 // 4, net.IP + DHCPOptStaticRoute DHCPOpt = 33 // n*8, [n]{net.IP/net.IP} -- note the 2nd is router not mask + DHCPOptARPTrailers DHCPOpt = 34 // 1, bool + DHCPOptARPTimeout DHCPOpt = 35 // 4, uint32 + DHCPOptEthernetEncap DHCPOpt = 36 // 1, bool + DHCPOptTCPTTL DHCPOpt = 37 // 1, byte + DHCPOptTCPKeepAliveInt DHCPOpt = 38 // 4, uint32 + DHCPOptTCPKeepAliveGarbage DHCPOpt = 39 // 1, bool + DHCPOptNISDomain DHCPOpt = 40 // n, string + DHCPOptNISServers DHCPOpt = 41 // 4*n, [n]net.IP + DHCPOptNTPServers DHCPOpt = 42 // 4*n, [n]net.IP + DHCPOptVendorOption DHCPOpt = 43 // n, [n]byte // may be encapsulated. + DHCPOptNetBIOSTCPNS DHCPOpt = 44 // 4*n, [n]net.IP + DHCPOptNetBIOSTCPDDS DHCPOpt = 45 // 4*n, [n]net.IP + DHCPOptNETBIOSTCPNodeType DHCPOpt = 46 // 1, magic byte + DHCPOptNetBIOSTCPScope DHCPOpt = 47 // n, string + DHCPOptXFontServer DHCPOpt = 48 // n, string + DHCPOptXDisplayManager DHCPOpt = 49 // n, string + DHCPOptRequestIP DHCPOpt = 50 // 4, net.IP + DHCPOptLeaseTime DHCPOpt = 51 // 4, uint32 + DHCPOptExtOptions DHCPOpt = 52 // 1, 1/2/3 + DHCPOptMessageType DHCPOpt = 53 // 1, 1-7 + DHCPOptServerID DHCPOpt = 54 // 4, net.IP + DHCPOptParamsRequest DHCPOpt = 55 // n, []byte + DHCPOptMessage DHCPOpt = 56 // n, 3 + DHCPOptMaxMessageSize DHCPOpt = 57 // 2, uint16 + DHCPOptT1 DHCPOpt = 58 // 4, uint32 + DHCPOptT2 DHCPOpt = 59 // 4, uint32 + DHCPOptClassID DHCPOpt = 60 // n, []byte + DHCPOptClientID DHCPOpt = 61 // n >= 2, []byte + DHCPOptDomainSearch DHCPOpt = 119 // n, string + DHCPOptSIPServers DHCPOpt = 120 // n, url + DHCPOptClasslessStaticRoute DHCPOpt = 121 // + DHCPOptEnd DHCPOpt = 255 +) + +// String returns a string version of a DHCPOpt. +func (o DHCPOpt) String() string { + switch o { + case DHCPOptPad: + return "(padding)" + case DHCPOptSubnetMask: + return "SubnetMask" + case DHCPOptTimeOffset: + return "TimeOffset" + case DHCPOptRouter: + return "Router" + case DHCPOptTimeServer: + return "rfc868" // old time server protocol stringified to dissuade confusion w. NTP + case DHCPOptNameServer: + return "ien116" // obscure nameserver protocol stringified to dissuade confusion w. DNS + case DHCPOptDNS: + return "DNS" + case DHCPOptLogServer: + return "mitLCS" // MIT LCS server protocol yada yada w. Syslog + case DHCPOptCookieServer: + return "CookieServer" + case DHCPOptLPRServer: + return "LPRServer" + case DHCPOptImpressServer: + return "ImpressServer" + case DHCPOptResLocServer: + return "ResourceLocationServer" + case DHCPOptHostname: + return "Hostname" + case DHCPOptBootfileSize: + return "BootfileSize" + case DHCPOptMeritDumpFile: + return "MeritDumpFile" + case DHCPOptDomainName: + return "DomainName" + case DHCPOptSwapServer: + return "SwapServer" + case DHCPOptRootPath: + return "RootPath" + case DHCPOptExtensionsPath: + return "ExtensionsPath" + case DHCPOptIPForwarding: + return "IPForwarding" + case DHCPOptSourceRouting: + return "SourceRouting" + case DHCPOptPolicyFilter: + return "PolicyFilter" + case DHCPOptDatagramMTU: + return "DatagramMTU" + case DHCPOptDefaultTTL: + return "DefaultTTL" + case DHCPOptPathMTUAgingTimeout: + return "PathMTUAgingTimeout" + case DHCPOptPathPlateuTableOption: + return "PathPlateuTableOption" + case DHCPOptInterfaceMTU: + return "InterfaceMTU" + case DHCPOptAllSubsLocal: + return "AllSubsLocal" + case DHCPOptBroadcastAddr: + return "BroadcastAddress" + case DHCPOptMaskDiscovery: + return "MaskDiscovery" + case DHCPOptMaskSupplier: + return "MaskSupplier" + case DHCPOptRouterDiscovery: + return "RouterDiscovery" + case DHCPOptSolicitAddr: + return "SolicitAddr" + case DHCPOptStaticRoute: + return "StaticRoute" + case DHCPOptARPTrailers: + return "ARPTrailers" + case DHCPOptARPTimeout: + return "ARPTimeout" + case DHCPOptEthernetEncap: + return "EthernetEncap" + case DHCPOptTCPTTL: + return "TCPTTL" + case DHCPOptTCPKeepAliveInt: + return "TCPKeepAliveInt" + case DHCPOptTCPKeepAliveGarbage: + return "TCPKeepAliveGarbage" + case DHCPOptNISDomain: + return "NISDomain" + case DHCPOptNISServers: + return "NISServers" + case DHCPOptNTPServers: + return "NTPServers" + case DHCPOptVendorOption: + return "VendorOption" + case DHCPOptNetBIOSTCPNS: + return "NetBIOSOverTCPNS" + case DHCPOptNetBIOSTCPDDS: + return "NetBiosOverTCPDDS" + case DHCPOptNETBIOSTCPNodeType: + return "NetBIOSOverTCPNodeType" + case DHCPOptNetBIOSTCPScope: + return "NetBIOSOverTCPScope" + case DHCPOptXFontServer: + return "XFontServer" + case DHCPOptXDisplayManager: + return "XDisplayManager" + case DHCPOptEnd: + return "(end)" + case DHCPOptSIPServers: + return "SipServers" + case DHCPOptRequestIP: + return "RequestIP" + case DHCPOptLeaseTime: + return "LeaseTime" + case DHCPOptExtOptions: + return "ExtOpts" + case DHCPOptMessageType: + return "MessageType" + case DHCPOptServerID: + return "ServerID" + case DHCPOptParamsRequest: + return "ParamsRequest" + case DHCPOptMessage: + return "Message" + case DHCPOptMaxMessageSize: + return "MaxDHCPSize" + case DHCPOptT1: + return "Timer1" + case DHCPOptT2: + return "Timer2" + case DHCPOptClassID: + return "ClassID" + case DHCPOptClientID: + return "ClientID" + case DHCPOptDomainSearch: + return "DomainSearch" + case DHCPOptClasslessStaticRoute: + return "ClasslessStaticRoute" + default: + return "Unknown" + } +} + +// DHCPOption rerpresents a DHCP option. +type DHCPOption struct { + Type DHCPOpt + Length uint8 + Data []byte +} + +// String returns a string version of a DHCP Option. +func (o DHCPOption) String() string { + switch o.Type { + + case DHCPOptHostname, DHCPOptMeritDumpFile, DHCPOptDomainName, DHCPOptRootPath, + DHCPOptExtensionsPath, DHCPOptNISDomain, DHCPOptNetBIOSTCPScope, DHCPOptXFontServer, + DHCPOptXDisplayManager, DHCPOptMessage, DHCPOptDomainSearch: // string + return fmt.Sprintf("Option(%s:%s)", o.Type, string(o.Data)) + + case DHCPOptMessageType: + if len(o.Data) != 1 { + return fmt.Sprintf("Option(%s:INVALID)", o.Type) + } + return fmt.Sprintf("Option(%s:%s)", o.Type, DHCPMsgType(o.Data[0])) + + case DHCPOptSubnetMask, DHCPOptServerID, DHCPOptBroadcastAddr, + DHCPOptSolicitAddr, DHCPOptRequestIP: // net.IP + if len(o.Data) < 4 { + return fmt.Sprintf("Option(%s:INVALID)", o.Type) + } + return fmt.Sprintf("Option(%s:%s)", o.Type, net.IP(o.Data)) + + case DHCPOptT1, DHCPOptT2, DHCPOptLeaseTime, DHCPOptPathMTUAgingTimeout, + DHCPOptARPTimeout, DHCPOptTCPKeepAliveInt: // uint32 + if len(o.Data) != 4 { + return fmt.Sprintf("Option(%s:INVALID)", o.Type) + } + return fmt.Sprintf("Option(%s:%d)", o.Type, + uint32(o.Data[0])<<24|uint32(o.Data[1])<<16|uint32(o.Data[2])<<8|uint32(o.Data[3])) + + case DHCPOptParamsRequest: + buf := &bytes.Buffer{} + buf.WriteString(fmt.Sprintf("Option(%s:", o.Type)) + for i, v := range o.Data { + buf.WriteString(DHCPOpt(v).String()) + if i+1 != len(o.Data) { + buf.WriteByte(',') + } + } + buf.WriteString(")") + return buf.String() + + default: + return fmt.Sprintf("Option(%s:%v)", o.Type, o.Data) + } +} + +// NewDHCPOption constructs a new DHCPOption with a given type and data. +func NewDHCPOption(t DHCPOpt, data []byte) DHCPOption { + o := DHCPOption{Type: t} + if data != nil { + o.Data = data + o.Length = uint8(len(data)) + } + return o +} + +func (o *DHCPOption) encode(b []byte) error { + switch o.Type { + case DHCPOptPad, DHCPOptEnd: + b[0] = byte(o.Type) + default: + b[0] = byte(o.Type) + b[1] = o.Length + copy(b[2:], o.Data) + } + return nil +} + +func (o *DHCPOption) decode(data []byte) error { + if len(data) < 1 { + // Pad/End have a length of 1 + return DecOptionNotEnoughData + } + o.Type = DHCPOpt(data[0]) + switch o.Type { + case DHCPOptPad, DHCPOptEnd: + o.Data = nil + default: + if len(data) < 2 { + return DecOptionNotEnoughData + } + o.Length = data[1] + if int(o.Length) > len(data[2:]) { + return DecOptionMalformed + } + o.Data = data[2 : 2+int(o.Length)] + } + return nil +} + +// DHCPv4Error is used for constant errors for DHCPv4. It is needed for test asserts. +type DHCPv4Error string + +// DHCPv4Error implements error interface. +func (d DHCPv4Error) Error() string { + return string(d) +} + +const ( + // DecOptionNotEnoughData is returned when there is not enough data during option's decode process + DecOptionNotEnoughData = DHCPv4Error("Not enough data to decode") + // DecOptionMalformed is returned when the option is malformed + DecOptionMalformed = DHCPv4Error("Option is malformed") + // InvalidMagicCookie is returned when Magic cookie is missing into BOOTP header + InvalidMagicCookie = DHCPv4Error("Bad DHCP header") +) diff --git a/backend/vendor/github.com/google/gopacket/layers/dhcpv6.go b/backend/vendor/github.com/google/gopacket/layers/dhcpv6.go new file mode 100644 index 0000000..2698cfb --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/dhcpv6.go @@ -0,0 +1,360 @@ +// Copyright 2018 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "fmt" + "net" + + "github.com/google/gopacket" +) + +// DHCPv6MsgType represents a DHCPv6 operation +type DHCPv6MsgType byte + +// Constants that represent DHCP operations +const ( + DHCPv6MsgTypeUnspecified DHCPv6MsgType = iota + DHCPv6MsgTypeSolicit + DHCPv6MsgTypeAdverstise + DHCPv6MsgTypeRequest + DHCPv6MsgTypeConfirm + DHCPv6MsgTypeRenew + DHCPv6MsgTypeRebind + DHCPv6MsgTypeReply + DHCPv6MsgTypeRelease + DHCPv6MsgTypeDecline + DHCPv6MsgTypeReconfigure + DHCPv6MsgTypeInformationRequest + DHCPv6MsgTypeRelayForward + DHCPv6MsgTypeRelayReply +) + +// String returns a string version of a DHCPv6MsgType. +func (o DHCPv6MsgType) String() string { + switch o { + case DHCPv6MsgTypeUnspecified: + return "Unspecified" + case DHCPv6MsgTypeSolicit: + return "Solicit" + case DHCPv6MsgTypeAdverstise: + return "Adverstise" + case DHCPv6MsgTypeRequest: + return "Request" + case DHCPv6MsgTypeConfirm: + return "Confirm" + case DHCPv6MsgTypeRenew: + return "Renew" + case DHCPv6MsgTypeRebind: + return "Rebind" + case DHCPv6MsgTypeReply: + return "Reply" + case DHCPv6MsgTypeRelease: + return "Release" + case DHCPv6MsgTypeDecline: + return "Decline" + case DHCPv6MsgTypeReconfigure: + return "Reconfigure" + case DHCPv6MsgTypeInformationRequest: + return "InformationRequest" + case DHCPv6MsgTypeRelayForward: + return "RelayForward" + case DHCPv6MsgTypeRelayReply: + return "RelayReply" + default: + return "Unknown" + } +} + +// DHCPv6 contains data for a single DHCP packet. +type DHCPv6 struct { + BaseLayer + MsgType DHCPv6MsgType + HopCount uint8 + LinkAddr net.IP + PeerAddr net.IP + TransactionID []byte + Options DHCPv6Options +} + +// LayerType returns gopacket.LayerTypeDHCPv6 +func (d *DHCPv6) LayerType() gopacket.LayerType { return LayerTypeDHCPv6 } + +// DecodeFromBytes decodes the given bytes into this layer. +func (d *DHCPv6) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 4 { + df.SetTruncated() + return fmt.Errorf("DHCPv6 length %d too short", len(data)) + } + d.BaseLayer = BaseLayer{Contents: data} + d.Options = d.Options[:0] + d.MsgType = DHCPv6MsgType(data[0]) + + offset := 0 + if d.MsgType == DHCPv6MsgTypeRelayForward || d.MsgType == DHCPv6MsgTypeRelayReply { + if len(data) < 34 { + df.SetTruncated() + return fmt.Errorf("DHCPv6 length %d too short for message type %d", len(data), d.MsgType) + } + d.HopCount = data[1] + d.LinkAddr = net.IP(data[2:18]) + d.PeerAddr = net.IP(data[18:34]) + offset = 34 + } else { + d.TransactionID = data[1:4] + offset = 4 + } + + stop := len(data) + for offset < stop { + o := DHCPv6Option{} + if err := o.decode(data[offset:]); err != nil { + return err + } + d.Options = append(d.Options, o) + offset += int(o.Length) + 4 // 2 from option code, 2 from option length + } + + return nil +} + +// Len returns the length of a DHCPv6 packet. +func (d *DHCPv6) Len() int { + n := 1 + if d.MsgType == DHCPv6MsgTypeRelayForward || d.MsgType == DHCPv6MsgTypeRelayReply { + n += 33 + } else { + n += 3 + } + + for _, o := range d.Options { + n += int(o.Length) + 4 // 2 from option code, 2 from option length + } + + return n +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (d *DHCPv6) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + plen := int(d.Len()) + + data, err := b.PrependBytes(plen) + if err != nil { + return err + } + + offset := 0 + data[0] = byte(d.MsgType) + if d.MsgType == DHCPv6MsgTypeRelayForward || d.MsgType == DHCPv6MsgTypeRelayReply { + data[1] = byte(d.HopCount) + copy(data[2:18], d.LinkAddr.To16()) + copy(data[18:34], d.PeerAddr.To16()) + offset = 34 + } else { + copy(data[1:4], d.TransactionID) + offset = 4 + } + + if len(d.Options) > 0 { + for _, o := range d.Options { + if err := o.encode(data[offset:], opts); err != nil { + return err + } + offset += int(o.Length) + 4 // 2 from option code, 2 from option length + } + } + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (d *DHCPv6) CanDecode() gopacket.LayerClass { + return LayerTypeDHCPv6 +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (d *DHCPv6) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +func decodeDHCPv6(data []byte, p gopacket.PacketBuilder) error { + dhcp := &DHCPv6{} + err := dhcp.DecodeFromBytes(data, p) + if err != nil { + return err + } + p.AddLayer(dhcp) + return p.NextDecoder(gopacket.LayerTypePayload) +} + +// DHCPv6StatusCode represents a DHCP status code - RFC-3315 +type DHCPv6StatusCode uint16 + +// Constants for the DHCPv6StatusCode. +const ( + DHCPv6StatusCodeSuccess DHCPv6StatusCode = iota + DHCPv6StatusCodeUnspecFail + DHCPv6StatusCodeNoAddrsAvail + DHCPv6StatusCodeNoBinding + DHCPv6StatusCodeNotOnLink + DHCPv6StatusCodeUseMulticast +) + +// String returns a string version of a DHCPv6StatusCode. +func (o DHCPv6StatusCode) String() string { + switch o { + case DHCPv6StatusCodeSuccess: + return "Success" + case DHCPv6StatusCodeUnspecFail: + return "UnspecifiedFailure" + case DHCPv6StatusCodeNoAddrsAvail: + return "NoAddressAvailable" + case DHCPv6StatusCodeNoBinding: + return "NoBinding" + case DHCPv6StatusCodeNotOnLink: + return "NotOnLink" + case DHCPv6StatusCodeUseMulticast: + return "UseMulticast" + default: + return "Unknown" + } +} + +// DHCPv6DUIDType represents a DHCP DUID - RFC-3315 +type DHCPv6DUIDType uint16 + +// Constants for the DHCPv6DUIDType. +const ( + DHCPv6DUIDTypeLLT DHCPv6DUIDType = iota + 1 + DHCPv6DUIDTypeEN + DHCPv6DUIDTypeLL +) + +// String returns a string version of a DHCPv6DUIDType. +func (o DHCPv6DUIDType) String() string { + switch o { + case DHCPv6DUIDTypeLLT: + return "LLT" + case DHCPv6DUIDTypeEN: + return "EN" + case DHCPv6DUIDTypeLL: + return "LL" + default: + return "Unknown" + } +} + +// DHCPv6DUID means DHCP Unique Identifier as stated in RFC 3315, section 9 (https://tools.ietf.org/html/rfc3315#page-19) +type DHCPv6DUID struct { + Type DHCPv6DUIDType + // LLT, LL + HardwareType []byte + // EN + EnterpriseNumber []byte + // LLT + Time []byte + // LLT, LL + LinkLayerAddress net.HardwareAddr + // EN + Identifier []byte +} + +// DecodeFromBytes decodes the given bytes into a DHCPv6DUID +func (d *DHCPv6DUID) DecodeFromBytes(data []byte) error { + if len(data) < 2 { + return fmt.Errorf("Not enough bytes to decode: %d", len(data)) + } + + d.Type = DHCPv6DUIDType(binary.BigEndian.Uint16(data[:2])) + if d.Type == DHCPv6DUIDTypeLLT || d.Type == DHCPv6DUIDTypeLL { + if len(data) < 4 { + return fmt.Errorf("Not enough bytes to decode: %d", len(data)) + } + d.HardwareType = data[2:4] + } + + if d.Type == DHCPv6DUIDTypeLLT { + if len(data) < 8 { + return fmt.Errorf("Not enough bytes to decode: %d", len(data)) + } + d.Time = data[4:8] + d.LinkLayerAddress = net.HardwareAddr(data[8:]) + } else if d.Type == DHCPv6DUIDTypeEN { + if len(data) < 6 { + return fmt.Errorf("Not enough bytes to decode: %d", len(data)) + } + d.EnterpriseNumber = data[2:6] + d.Identifier = data[6:] + } else { // DHCPv6DUIDTypeLL + if len(data) < 4 { + return fmt.Errorf("Not enough bytes to decode: %d", len(data)) + } + d.LinkLayerAddress = net.HardwareAddr(data[4:]) + } + + return nil +} + +// Encode encodes the DHCPv6DUID in a slice of bytes +func (d *DHCPv6DUID) Encode() []byte { + length := d.Len() + data := make([]byte, length) + binary.BigEndian.PutUint16(data[0:2], uint16(d.Type)) + + if d.Type == DHCPv6DUIDTypeLLT || d.Type == DHCPv6DUIDTypeLL { + copy(data[2:4], d.HardwareType) + } + + if d.Type == DHCPv6DUIDTypeLLT { + copy(data[4:8], d.Time) + copy(data[8:], d.LinkLayerAddress) + } else if d.Type == DHCPv6DUIDTypeEN { + copy(data[2:6], d.EnterpriseNumber) + copy(data[6:], d.Identifier) + } else { + copy(data[4:], d.LinkLayerAddress) + } + + return data +} + +// Len returns the length of the DHCPv6DUID, respecting the type +func (d *DHCPv6DUID) Len() int { + length := 2 // d.Type + if d.Type == DHCPv6DUIDTypeLLT { + length += 2 /*HardwareType*/ + 4 /*d.Time*/ + len(d.LinkLayerAddress) + } else if d.Type == DHCPv6DUIDTypeEN { + length += 4 /*d.EnterpriseNumber*/ + len(d.Identifier) + } else { // LL + length += 2 /*d.HardwareType*/ + len(d.LinkLayerAddress) + } + + return length +} + +func (d *DHCPv6DUID) String() string { + duid := "Type: " + d.Type.String() + ", " + if d.Type == DHCPv6DUIDTypeLLT { + duid += fmt.Sprintf("HardwareType: %v, Time: %v, LinkLayerAddress: %v", d.HardwareType, d.Time, d.LinkLayerAddress) + } else if d.Type == DHCPv6DUIDTypeEN { + duid += fmt.Sprintf("EnterpriseNumber: %v, Identifier: %v", d.EnterpriseNumber, d.Identifier) + } else { // DHCPv6DUIDTypeLL + duid += fmt.Sprintf("HardwareType: %v, LinkLayerAddress: %v", d.HardwareType, d.LinkLayerAddress) + } + return duid +} + +func decodeDHCPv6DUID(data []byte) (*DHCPv6DUID, error) { + duid := &DHCPv6DUID{} + err := duid.DecodeFromBytes(data) + if err != nil { + return nil, err + } + return duid, nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/dhcpv6_options.go b/backend/vendor/github.com/google/gopacket/layers/dhcpv6_options.go new file mode 100644 index 0000000..5a1f991 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/dhcpv6_options.go @@ -0,0 +1,621 @@ +// Copyright 2018 The GoPacket Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "bytes" + "encoding/binary" + "errors" + "fmt" + "github.com/google/gopacket" +) + +// DHCPv6Opt represents a DHCP option or parameter from RFC-3315 +type DHCPv6Opt uint16 + +// Constants for the DHCPv6Opt options. +const ( + DHCPv6OptClientID DHCPv6Opt = 1 + DHCPv6OptServerID DHCPv6Opt = 2 + DHCPv6OptIANA DHCPv6Opt = 3 + DHCPv6OptIATA DHCPv6Opt = 4 + DHCPv6OptIAAddr DHCPv6Opt = 5 + DHCPv6OptOro DHCPv6Opt = 6 + DHCPv6OptPreference DHCPv6Opt = 7 + DHCPv6OptElapsedTime DHCPv6Opt = 8 + DHCPv6OptRelayMessage DHCPv6Opt = 9 + DHCPv6OptAuth DHCPv6Opt = 11 + DHCPv6OptUnicast DHCPv6Opt = 12 + DHCPv6OptStatusCode DHCPv6Opt = 13 + DHCPv6OptRapidCommit DHCPv6Opt = 14 + DHCPv6OptUserClass DHCPv6Opt = 15 + DHCPv6OptVendorClass DHCPv6Opt = 16 + DHCPv6OptVendorOpts DHCPv6Opt = 17 + DHCPv6OptInterfaceID DHCPv6Opt = 18 + DHCPv6OptReconfigureMessage DHCPv6Opt = 19 + DHCPv6OptReconfigureAccept DHCPv6Opt = 20 + + // RFC 3319 Session Initiation Protocol (SIP) + DHCPv6OptSIPServersDomainList DHCPv6Opt = 21 + DHCPv6OptSIPServersAddressList DHCPv6Opt = 22 + + // RFC 3646 DNS Configuration + DHCPv6OptDNSServers DHCPv6Opt = 23 + DHCPv6OptDomainList DHCPv6Opt = 24 + + // RFC 3633 Prefix Delegation + DHCPv6OptIAPD DHCPv6Opt = 25 + DHCPv6OptIAPrefix DHCPv6Opt = 26 + + // RFC 3898 Network Information Service (NIS) + DHCPv6OptNISServers DHCPv6Opt = 27 + DHCPv6OptNISPServers DHCPv6Opt = 28 + DHCPv6OptNISDomainName DHCPv6Opt = 29 + DHCPv6OptNISPDomainName DHCPv6Opt = 30 + + // RFC 4075 Simple Network Time Protocol (SNTP) + DHCPv6OptSNTPServers DHCPv6Opt = 31 + + // RFC 4242 Information Refresh Time Option + DHCPv6OptInformationRefreshTime DHCPv6Opt = 32 + + // RFC 4280 Broadcast and Multicast Control Servers + DHCPv6OptBCMCSServerDomainNameList DHCPv6Opt = 33 + DHCPv6OptBCMCSServerAddressList DHCPv6Opt = 34 + + // RFC 4776 Civic Address ConfigurationOption + DHCPv6OptGeoconfCivic DHCPv6Opt = 36 + + // RFC 4649 Relay Agent Remote-ID + DHCPv6OptRemoteID DHCPv6Opt = 37 + + // RFC 4580 Relay Agent Subscriber-ID + DHCPv6OptSubscriberID DHCPv6Opt = 38 + + // RFC 4704 Client Full Qualified Domain Name (FQDN) + DHCPv6OptClientFQDN DHCPv6Opt = 39 + + // RFC 5192 Protocol for Carrying Authentication for Network Access (PANA) + DHCPv6OptPanaAgent DHCPv6Opt = 40 + + // RFC 4833 Timezone Options + DHCPv6OptNewPOSIXTimezone DHCPv6Opt = 41 + DHCPv6OptNewTZDBTimezone DHCPv6Opt = 42 + + // RFC 4994 Relay Agent Echo Request + DHCPv6OptEchoRequestOption DHCPv6Opt = 43 + + // RFC 5007 Leasequery + DHCPv6OptLQQuery DHCPv6Opt = 44 + DHCPv6OptCLTTime DHCPv6Opt = 45 + DHCPv6OptClientData DHCPv6Opt = 46 + DHCPv6OptLQRelayData DHCPv6Opt = 47 + DHCPv6OptLQClientLink DHCPv6Opt = 48 + + // RFC 6610 Home Information Discovery in Mobile IPv6 (MIPv6) + DHCPv6OptMIP6HNIDF DHCPv6Opt = 49 + DHCPv6OptMIP6VDINF DHCPv6Opt = 50 + DHCPv6OptMIP6IDINF DHCPv6Opt = 69 + DHCPv6OptMIP6UDINF DHCPv6Opt = 70 + DHCPv6OptMIP6HNP DHCPv6Opt = 71 + DHCPv6OptMIP6HAA DHCPv6Opt = 72 + DHCPv6OptMIP6HAF DHCPv6Opt = 73 + + // RFC 5223 Discovering Location-to-Service Translation (LoST) Servers + DHCPv6OptV6LOST DHCPv6Opt = 51 + + // RFC 5417 Control And Provisioning of Wireless Access Points (CAPWAP) + DHCPv6OptCAPWAPACV6 DHCPv6Opt = 52 + + // RFC 5460 Bulk Leasequery + DHCPv6OptRelayID DHCPv6Opt = 53 + + // RFC 5678 IEEE 802.21 Mobility Services (MoS) Discovery + DHCPv6OptIPv6AddressMoS DHCPv6Opt = 54 + DHCPv6OptIPv6FQDNMoS DHCPv6Opt = 55 + + // RFC 5908 NTP Server Option + DHCPv6OptNTPServer DHCPv6Opt = 56 + + // RFC 5986 Discovering the Local Location Information Server (LIS) + DHCPv6OptV6AccessDomain DHCPv6Opt = 57 + + // RFC 5986 SIP User Agent + DHCPv6OptSIPUACSList DHCPv6Opt = 58 + + // RFC 5970 Options for Network Boot + DHCPv6OptBootFileURL DHCPv6Opt = 59 + DHCPv6OptBootFileParam DHCPv6Opt = 60 + DHCPv6OptClientArchType DHCPv6Opt = 61 + DHCPv6OptNII DHCPv6Opt = 62 + + // RFC 6225 Coordinate-Based Location Configuration Information + DHCPv6OptGeolocation DHCPv6Opt = 63 + + // RFC 6334 Dual-Stack Lite + DHCPv6OptAFTRName DHCPv6Opt = 64 + + // RFC 6440 EAP Re-authentication Protocol (ERP) + DHCPv6OptERPLocalDomainName DHCPv6Opt = 65 + + // RFC 6422 Relay-Supplied DHCP Options + DHCPv6OptRSOO DHCPv6Opt = 66 + + // RFC 6603 Prefix Exclude Option for DHCPv6-based Prefix Delegation + DHCPv6OptPDExclude DHCPv6Opt = 67 + + // RFC 6607 Virtual Subnet Selection + DHCPv6OptVSS DHCPv6Opt = 68 + + // RFC 6731 Improved Recursive DNS Server Selection for Multi-Interfaced Nodes + DHCPv6OptRDNSSSelection DHCPv6Opt = 74 + + // RFC 6784 Kerberos Options for DHCPv6 + DHCPv6OptKRBPrincipalName DHCPv6Opt = 75 + DHCPv6OptKRBRealmName DHCPv6Opt = 76 + DHCPv6OptKRBKDC DHCPv6Opt = 77 + + // RFC 6939 Client Link-Layer Address Option + DHCPv6OptClientLinkLayerAddress DHCPv6Opt = 79 + + // RFC 6977 Triggering DHCPv6 Reconfiguration from Relay Agents + DHCPv6OptLinkAddress DHCPv6Opt = 80 + + // RFC 7037 RADIUS Option for the DHCPv6 Relay Agent + DHCPv6OptRADIUS DHCPv6Opt = 81 + + // RFC 7083 Modification to Default Values of SOL_MAX_RT and INF_MAX_RT + DHCPv6OptSolMaxRt DHCPv6Opt = 82 + DHCPv6OptInfMaxRt DHCPv6Opt = 83 + + // RFC 7078 Distributing Address Selection Policy + DHCPv6OptAddrSel DHCPv6Opt = 84 + DHCPv6OptAddrSelTable DHCPv6Opt = 85 + + // RFC 7291 DHCP Options for the Port Control Protocol (PCP) + DHCPv6OptV6PCPServer DHCPv6Opt = 86 + + // RFC 7341 DHCPv4-over-DHCPv6 (DHCP 4o6) Transport + DHCPv6OptDHCPv4Message DHCPv6Opt = 87 + DHCPv6OptDHCPv4OverDHCPv6Server DHCPv6Opt = 88 + + // RFC 7598 Configuration of Softwire Address and Port-Mapped Clients + DHCPv6OptS46Rule DHCPv6Opt = 89 + DHCPv6OptS46BR DHCPv6Opt = 90 + DHCPv6OptS46DMR DHCPv6Opt = 91 + DHCPv6OptS46V4V4Bind DHCPv6Opt = 92 + DHCPv6OptS46PortParameters DHCPv6Opt = 93 + DHCPv6OptS46ContMAPE DHCPv6Opt = 94 + DHCPv6OptS46ContMAPT DHCPv6Opt = 95 + DHCPv6OptS46ContLW DHCPv6Opt = 96 + + // RFC 7600 IPv4 Residual Deployment via IPv6 + DHCPv6Opt4RD DHCPv6Opt = 97 + DHCPv6Opt4RDMapRule DHCPv6Opt = 98 + DHCPv6Opt4RDNonMapRule DHCPv6Opt = 99 + + // RFC 7653 Active Leasequery + DHCPv6OptLQBaseTime DHCPv6Opt = 100 + DHCPv6OptLQStartTime DHCPv6Opt = 101 + DHCPv6OptLQEndTime DHCPv6Opt = 102 + + // RFC 7710 Captive-Portal Identification + DHCPv6OptCaptivePortal DHCPv6Opt = 103 + + // RFC 7774 Multicast Protocol for Low-Power and Lossy Networks (MPL) Parameter Configuration + DHCPv6OptMPLParameters DHCPv6Opt = 104 + + // RFC 7839 Access-Network-Identifier (ANI) + DHCPv6OptANIATT DHCPv6Opt = 105 + DHCPv6OptANINetworkName DHCPv6Opt = 106 + DHCPv6OptANIAPName DHCPv6Opt = 107 + DHCPv6OptANIAPBSSID DHCPv6Opt = 108 + DHCPv6OptANIOperatorID DHCPv6Opt = 109 + DHCPv6OptANIOperatorRealm DHCPv6Opt = 110 + + // RFC 8026 Unified IPv4-in-IPv6 Softwire Customer Premises Equipment (CPE) + DHCPv6OptS46Priority DHCPv6Opt = 111 + + // draft-ietf-opsawg-mud-25 Manufacturer Usage Description (MUD) + DHCPv6OptMUDURLV6 DHCPv6Opt = 112 + + // RFC 8115 IPv4-Embedded Multicast and Unicast IPv6 Prefixes + DHCPv6OptV6Prefix64 DHCPv6Opt = 113 + + // RFC 8156 DHCPv6 Failover Protocol + DHCPv6OptFBindingStatus DHCPv6Opt = 114 + DHCPv6OptFConnectFlags DHCPv6Opt = 115 + DHCPv6OptFDNSRemovalInfo DHCPv6Opt = 116 + DHCPv6OptFDNSHostName DHCPv6Opt = 117 + DHCPv6OptFDNSZoneName DHCPv6Opt = 118 + DHCPv6OptFDNSFlags DHCPv6Opt = 119 + DHCPv6OptFExpirationTime DHCPv6Opt = 120 + DHCPv6OptFMaxUnacknowledgedBNDUPD DHCPv6Opt = 121 + DHCPv6OptFMCLT DHCPv6Opt = 122 + DHCPv6OptFPartnerLifetime DHCPv6Opt = 123 + DHCPv6OptFPartnerLifetimeSent DHCPv6Opt = 124 + DHCPv6OptFPartnerDownTime DHCPv6Opt = 125 + DHCPv6OptFPartnerRawCltTime DHCPv6Opt = 126 + DHCPv6OptFProtocolVersion DHCPv6Opt = 127 + DHCPv6OptFKeepaliveTime DHCPv6Opt = 128 + DHCPv6OptFReconfigureData DHCPv6Opt = 129 + DHCPv6OptFRelationshipName DHCPv6Opt = 130 + DHCPv6OptFServerFlags DHCPv6Opt = 131 + DHCPv6OptFServerState DHCPv6Opt = 132 + DHCPv6OptFStartTimeOfState DHCPv6Opt = 133 + DHCPv6OptFStateExpirationTime DHCPv6Opt = 134 + + // RFC 8357 Generalized UDP Source Port for DHCP Relay + DHCPv6OptRelayPort DHCPv6Opt = 135 + + // draft-ietf-netconf-zerotouch-25 Zero Touch Provisioning for Networking Devices + DHCPv6OptV6ZeroTouchRedirect DHCPv6Opt = 136 + + // RFC 6153 Access Network Discovery and Selection Function (ANDSF) Discovery + DHCPv6OptIPV6AddressANDSF DHCPv6Opt = 143 +) + +// String returns a string version of a DHCPv6Opt. +func (o DHCPv6Opt) String() string { + switch o { + case DHCPv6OptClientID: + return "ClientID" + case DHCPv6OptServerID: + return "ServerID" + case DHCPv6OptIANA: + return "IA_NA" + case DHCPv6OptIATA: + return "IA_TA" + case DHCPv6OptIAAddr: + return "IAAddr" + case DHCPv6OptOro: + return "Oro" + case DHCPv6OptPreference: + return "Preference" + case DHCPv6OptElapsedTime: + return "ElapsedTime" + case DHCPv6OptRelayMessage: + return "RelayMessage" + case DHCPv6OptAuth: + return "Auth" + case DHCPv6OptUnicast: + return "Unicast" + case DHCPv6OptStatusCode: + return "StatusCode" + case DHCPv6OptRapidCommit: + return "RapidCommit" + case DHCPv6OptUserClass: + return "UserClass" + case DHCPv6OptVendorClass: + return "VendorClass" + case DHCPv6OptVendorOpts: + return "VendorOpts" + case DHCPv6OptInterfaceID: + return "InterfaceID" + case DHCPv6OptReconfigureMessage: + return "ReconfigureMessage" + case DHCPv6OptReconfigureAccept: + return "ReconfigureAccept" + case DHCPv6OptSIPServersDomainList: + return "SIPServersDomainList" + case DHCPv6OptSIPServersAddressList: + return "SIPServersAddressList" + case DHCPv6OptDNSServers: + return "DNSRecursiveNameServer" + case DHCPv6OptDomainList: + return "DomainSearchList" + case DHCPv6OptIAPD: + return "IdentityAssociationPrefixDelegation" + case DHCPv6OptIAPrefix: + return "IAPDPrefix" + case DHCPv6OptNISServers: + return "NISServers" + case DHCPv6OptNISPServers: + return "NISv2Servers" + case DHCPv6OptNISDomainName: + return "NISDomainName" + case DHCPv6OptNISPDomainName: + return "NISv2DomainName" + case DHCPv6OptSNTPServers: + return "SNTPServers" + case DHCPv6OptInformationRefreshTime: + return "InformationRefreshTime" + case DHCPv6OptBCMCSServerDomainNameList: + return "BCMCSControlServersDomainNameList" + case DHCPv6OptBCMCSServerAddressList: + return "BCMCSControlServersAddressList" + case DHCPv6OptGeoconfCivic: + return "CivicAddress" + case DHCPv6OptRemoteID: + return "RelayAgentRemoteID" + case DHCPv6OptSubscriberID: + return "RelayAgentSubscriberID" + case DHCPv6OptClientFQDN: + return "ClientFQDN" + case DHCPv6OptPanaAgent: + return "PANAAuthenticationAgent" + case DHCPv6OptNewPOSIXTimezone: + return "NewPOSIXTimezone" + case DHCPv6OptNewTZDBTimezone: + return "NewTZDBTimezone" + case DHCPv6OptEchoRequestOption: + return "EchoRequest" + case DHCPv6OptLQQuery: + return "LeasequeryQuery" + case DHCPv6OptClientData: + return "LeasequeryClientData" + case DHCPv6OptCLTTime: + return "LeasequeryClientLastTransactionTime" + case DHCPv6OptLQRelayData: + return "LeasequeryRelayData" + case DHCPv6OptLQClientLink: + return "LeasequeryClientLink" + case DHCPv6OptMIP6HNIDF: + return "MIPv6HomeNetworkIDFQDN" + case DHCPv6OptMIP6VDINF: + return "MIPv6VisitedHomeNetworkInformation" + case DHCPv6OptMIP6IDINF: + return "MIPv6IdentifiedHomeNetworkInformation" + case DHCPv6OptMIP6UDINF: + return "MIPv6UnrestrictedHomeNetworkInformation" + case DHCPv6OptMIP6HNP: + return "MIPv6HomeNetworkPrefix" + case DHCPv6OptMIP6HAA: + return "MIPv6HomeAgentAddress" + case DHCPv6OptMIP6HAF: + return "MIPv6HomeAgentFQDN" + case DHCPv6OptV6LOST: + return "LoST Server" + case DHCPv6OptCAPWAPACV6: + return "CAPWAPAccessControllerV6" + case DHCPv6OptRelayID: + return "LeasequeryRelayID" + case DHCPv6OptIPv6AddressMoS: + return "MoSIPv6Address" + case DHCPv6OptIPv6FQDNMoS: + return "MoSDomainNameList" + case DHCPv6OptNTPServer: + return "NTPServer" + case DHCPv6OptV6AccessDomain: + return "AccessNetworkDomainName" + case DHCPv6OptSIPUACSList: + return "SIPUserAgentConfigurationServiceDomains" + case DHCPv6OptBootFileURL: + return "BootFileURL" + case DHCPv6OptBootFileParam: + return "BootFileParameters" + case DHCPv6OptClientArchType: + return "ClientSystemArchitectureType" + case DHCPv6OptNII: + return "ClientNetworkInterfaceIdentifier" + case DHCPv6OptGeolocation: + return "Geolocation" + case DHCPv6OptAFTRName: + return "AFTRName" + case DHCPv6OptERPLocalDomainName: + return "AFTRName" + case DHCPv6OptRSOO: + return "RSOOption" + case DHCPv6OptPDExclude: + return "PrefixExclude" + case DHCPv6OptVSS: + return "VirtualSubnetSelection" + case DHCPv6OptRDNSSSelection: + return "RDNSSSelection" + case DHCPv6OptKRBPrincipalName: + return "KerberosPrincipalName" + case DHCPv6OptKRBRealmName: + return "KerberosRealmName" + case DHCPv6OptKRBKDC: + return "KerberosKDC" + case DHCPv6OptClientLinkLayerAddress: + return "ClientLinkLayerAddress" + case DHCPv6OptLinkAddress: + return "LinkAddress" + case DHCPv6OptRADIUS: + return "RADIUS" + case DHCPv6OptSolMaxRt: + return "SolMaxRt" + case DHCPv6OptInfMaxRt: + return "InfMaxRt" + case DHCPv6OptAddrSel: + return "AddressSelection" + case DHCPv6OptAddrSelTable: + return "AddressSelectionTable" + case DHCPv6OptV6PCPServer: + return "PCPServer" + case DHCPv6OptDHCPv4Message: + return "DHCPv4Message" + case DHCPv6OptDHCPv4OverDHCPv6Server: + return "DHCP4o6ServerAddress" + case DHCPv6OptS46Rule: + return "S46Rule" + case DHCPv6OptS46BR: + return "S46BR" + case DHCPv6OptS46DMR: + return "S46DMR" + case DHCPv6OptS46V4V4Bind: + return "S46IPv4IPv6AddressBinding" + case DHCPv6OptS46PortParameters: + return "S46PortParameters" + case DHCPv6OptS46ContMAPE: + return "S46MAPEContainer" + case DHCPv6OptS46ContMAPT: + return "S46MAPTContainer" + case DHCPv6OptS46ContLW: + return "S46Lightweight4Over6Container" + case DHCPv6Opt4RD: + return "4RD" + case DHCPv6Opt4RDMapRule: + return "4RDMapRule" + case DHCPv6Opt4RDNonMapRule: + return "4RDNonMapRule" + case DHCPv6OptLQBaseTime: + return "LQBaseTime" + case DHCPv6OptLQStartTime: + return "LQStartTime" + case DHCPv6OptLQEndTime: + return "LQEndTime" + case DHCPv6OptCaptivePortal: + return "CaptivePortal" + case DHCPv6OptMPLParameters: + return "MPLParameterConfiguration" + case DHCPv6OptANIATT: + return "ANIAccessTechnologyType" + case DHCPv6OptANINetworkName: + return "ANINetworkName" + case DHCPv6OptANIAPName: + return "ANIAccessPointName" + case DHCPv6OptANIAPBSSID: + return "ANIAccessPointBSSID" + case DHCPv6OptANIOperatorID: + return "ANIOperatorIdentifier" + case DHCPv6OptANIOperatorRealm: + return "ANIOperatorRealm" + case DHCPv6OptS46Priority: + return "S64Priority" + case DHCPv6OptMUDURLV6: + return "ManufacturerUsageDescriptionURL" + case DHCPv6OptV6Prefix64: + return "V6Prefix64" + case DHCPv6OptFBindingStatus: + return "FailoverBindingStatus" + case DHCPv6OptFConnectFlags: + return "FailoverConnectFlags" + case DHCPv6OptFDNSRemovalInfo: + return "FailoverDNSRemovalInfo" + case DHCPv6OptFDNSHostName: + return "FailoverDNSHostName" + case DHCPv6OptFDNSZoneName: + return "FailoverDNSZoneName" + case DHCPv6OptFDNSFlags: + return "FailoverDNSFlags" + case DHCPv6OptFExpirationTime: + return "FailoverExpirationTime" + case DHCPv6OptFMaxUnacknowledgedBNDUPD: + return "FailoverMaxUnacknowledgedBNDUPDMessages" + case DHCPv6OptFMCLT: + return "FailoverMaximumClientLeadTime" + case DHCPv6OptFPartnerLifetime: + return "FailoverPartnerLifetime" + case DHCPv6OptFPartnerLifetimeSent: + return "FailoverPartnerLifetimeSent" + case DHCPv6OptFPartnerDownTime: + return "FailoverPartnerDownTime" + case DHCPv6OptFPartnerRawCltTime: + return "FailoverPartnerRawClientLeadTime" + case DHCPv6OptFProtocolVersion: + return "FailoverProtocolVersion" + case DHCPv6OptFKeepaliveTime: + return "FailoverKeepaliveTime" + case DHCPv6OptFReconfigureData: + return "FailoverReconfigureData" + case DHCPv6OptFRelationshipName: + return "FailoverRelationshipName" + case DHCPv6OptFServerFlags: + return "FailoverServerFlags" + case DHCPv6OptFServerState: + return "FailoverServerState" + case DHCPv6OptFStartTimeOfState: + return "FailoverStartTimeOfState" + case DHCPv6OptFStateExpirationTime: + return "FailoverStateExpirationTime" + case DHCPv6OptRelayPort: + return "RelayPort" + case DHCPv6OptV6ZeroTouchRedirect: + return "ZeroTouch" + case DHCPv6OptIPV6AddressANDSF: + return "ANDSFIPv6Address" + default: + return fmt.Sprintf("Unknown(%d)", uint16(o)) + } +} + +// DHCPv6Options is used to get nicely printed option lists which would normally +// be cut off after 5 options. +type DHCPv6Options []DHCPv6Option + +// String returns a string version of the options list. +func (o DHCPv6Options) String() string { + buf := &bytes.Buffer{} + buf.WriteByte('[') + for i, opt := range o { + buf.WriteString(opt.String()) + if i+1 != len(o) { + buf.WriteString(", ") + } + } + buf.WriteByte(']') + return buf.String() +} + +// DHCPv6Option rerpresents a DHCP option. +type DHCPv6Option struct { + Code DHCPv6Opt + Length uint16 + Data []byte +} + +// String returns a string version of a DHCP Option. +func (o DHCPv6Option) String() string { + switch o.Code { + case DHCPv6OptClientID, DHCPv6OptServerID: + duid, err := decodeDHCPv6DUID(o.Data) + if err != nil { + return fmt.Sprintf("Option(%s:INVALID)", o.Code) + } + return fmt.Sprintf("Option(%s:[%s])", o.Code, duid.String()) + case DHCPv6OptOro: + options := "" + for i := 0; i < int(o.Length); i += 2 { + if options != "" { + options += "," + } + option := DHCPv6Opt(binary.BigEndian.Uint16(o.Data[i : i+2])) + options += option.String() + } + return fmt.Sprintf("Option(%s:[%s])", o.Code, options) + default: + return fmt.Sprintf("Option(%s:%v)", o.Code, o.Data) + } +} + +// NewDHCPv6Option constructs a new DHCPv6Option with a given type and data. +func NewDHCPv6Option(code DHCPv6Opt, data []byte) DHCPv6Option { + o := DHCPv6Option{Code: code} + if data != nil { + o.Data = data + o.Length = uint16(len(data)) + } + + return o +} + +func (o *DHCPv6Option) encode(b []byte, opts gopacket.SerializeOptions) error { + binary.BigEndian.PutUint16(b[0:2], uint16(o.Code)) + if opts.FixLengths { + binary.BigEndian.PutUint16(b[2:4], uint16(len(o.Data))) + } else { + binary.BigEndian.PutUint16(b[2:4], o.Length) + } + copy(b[4:], o.Data) + + return nil +} + +func (o *DHCPv6Option) decode(data []byte) error { + if len(data) < 4 { + return errors.New("not enough data to decode") + } + o.Code = DHCPv6Opt(binary.BigEndian.Uint16(data[0:2])) + o.Length = binary.BigEndian.Uint16(data[2:4]) + if len(data) < 4+int(o.Length) { + return fmt.Errorf("dhcpv6 option size < length %d", 4+o.Length) + } + o.Data = data[4 : 4+o.Length] + return nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/dns.go b/backend/vendor/github.com/google/gopacket/layers/dns.go new file mode 100644 index 0000000..de55294 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/dns.go @@ -0,0 +1,1098 @@ +// Copyright 2014, 2018 GoPacket Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + "net" + "strings" + + "github.com/google/gopacket" +) + +// DNSClass defines the class associated with a request/response. Different DNS +// classes can be thought of as an array of parallel namespace trees. +type DNSClass uint16 + +// DNSClass known values. +const ( + DNSClassIN DNSClass = 1 // Internet + DNSClassCS DNSClass = 2 // the CSNET class (Obsolete) + DNSClassCH DNSClass = 3 // the CHAOS class + DNSClassHS DNSClass = 4 // Hesiod [Dyer 87] + DNSClassAny DNSClass = 255 // AnyClass +) + +func (dc DNSClass) String() string { + switch dc { + default: + return "Unknown" + case DNSClassIN: + return "IN" + case DNSClassCS: + return "CS" + case DNSClassCH: + return "CH" + case DNSClassHS: + return "HS" + case DNSClassAny: + return "Any" + } +} + +// DNSType defines the type of data being requested/returned in a +// question/answer. +type DNSType uint16 + +// DNSType known values. +const ( + DNSTypeA DNSType = 1 // a host address + DNSTypeNS DNSType = 2 // an authoritative name server + DNSTypeMD DNSType = 3 // a mail destination (Obsolete - use MX) + DNSTypeMF DNSType = 4 // a mail forwarder (Obsolete - use MX) + DNSTypeCNAME DNSType = 5 // the canonical name for an alias + DNSTypeSOA DNSType = 6 // marks the start of a zone of authority + DNSTypeMB DNSType = 7 // a mailbox domain name (EXPERIMENTAL) + DNSTypeMG DNSType = 8 // a mail group member (EXPERIMENTAL) + DNSTypeMR DNSType = 9 // a mail rename domain name (EXPERIMENTAL) + DNSTypeNULL DNSType = 10 // a null RR (EXPERIMENTAL) + DNSTypeWKS DNSType = 11 // a well known service description + DNSTypePTR DNSType = 12 // a domain name pointer + DNSTypeHINFO DNSType = 13 // host information + DNSTypeMINFO DNSType = 14 // mailbox or mail list information + DNSTypeMX DNSType = 15 // mail exchange + DNSTypeTXT DNSType = 16 // text strings + DNSTypeAAAA DNSType = 28 // a IPv6 host address [RFC3596] + DNSTypeSRV DNSType = 33 // server discovery [RFC2782] [RFC6195] + DNSTypeOPT DNSType = 41 // OPT Pseudo-RR [RFC6891] + DNSTypeURI DNSType = 256 // URI RR [RFC7553] +) + +func (dt DNSType) String() string { + switch dt { + default: + return "Unknown" + case DNSTypeA: + return "A" + case DNSTypeNS: + return "NS" + case DNSTypeMD: + return "MD" + case DNSTypeMF: + return "MF" + case DNSTypeCNAME: + return "CNAME" + case DNSTypeSOA: + return "SOA" + case DNSTypeMB: + return "MB" + case DNSTypeMG: + return "MG" + case DNSTypeMR: + return "MR" + case DNSTypeNULL: + return "NULL" + case DNSTypeWKS: + return "WKS" + case DNSTypePTR: + return "PTR" + case DNSTypeHINFO: + return "HINFO" + case DNSTypeMINFO: + return "MINFO" + case DNSTypeMX: + return "MX" + case DNSTypeTXT: + return "TXT" + case DNSTypeAAAA: + return "AAAA" + case DNSTypeSRV: + return "SRV" + case DNSTypeOPT: + return "OPT" + case DNSTypeURI: + return "URI" + } +} + +// DNSResponseCode provides response codes for question answers. +type DNSResponseCode uint8 + +// DNSResponseCode known values. +const ( + DNSResponseCodeNoErr DNSResponseCode = 0 // No error + DNSResponseCodeFormErr DNSResponseCode = 1 // Format Error [RFC1035] + DNSResponseCodeServFail DNSResponseCode = 2 // Server Failure [RFC1035] + DNSResponseCodeNXDomain DNSResponseCode = 3 // Non-Existent Domain [RFC1035] + DNSResponseCodeNotImp DNSResponseCode = 4 // Not Implemented [RFC1035] + DNSResponseCodeRefused DNSResponseCode = 5 // Query Refused [RFC1035] + DNSResponseCodeYXDomain DNSResponseCode = 6 // Name Exists when it should not [RFC2136] + DNSResponseCodeYXRRSet DNSResponseCode = 7 // RR Set Exists when it should not [RFC2136] + DNSResponseCodeNXRRSet DNSResponseCode = 8 // RR Set that should exist does not [RFC2136] + DNSResponseCodeNotAuth DNSResponseCode = 9 // Server Not Authoritative for zone [RFC2136] + DNSResponseCodeNotZone DNSResponseCode = 10 // Name not contained in zone [RFC2136] + DNSResponseCodeBadVers DNSResponseCode = 16 // Bad OPT Version [RFC2671] + DNSResponseCodeBadSig DNSResponseCode = 16 // TSIG Signature Failure [RFC2845] + DNSResponseCodeBadKey DNSResponseCode = 17 // Key not recognized [RFC2845] + DNSResponseCodeBadTime DNSResponseCode = 18 // Signature out of time window [RFC2845] + DNSResponseCodeBadMode DNSResponseCode = 19 // Bad TKEY Mode [RFC2930] + DNSResponseCodeBadName DNSResponseCode = 20 // Duplicate key name [RFC2930] + DNSResponseCodeBadAlg DNSResponseCode = 21 // Algorithm not supported [RFC2930] + DNSResponseCodeBadTruc DNSResponseCode = 22 // Bad Truncation [RFC4635] + DNSResponseCodeBadCookie DNSResponseCode = 23 // Bad/missing Server Cookie [RFC7873] +) + +func (drc DNSResponseCode) String() string { + switch drc { + default: + return "Unknown" + case DNSResponseCodeNoErr: + return "No Error" + case DNSResponseCodeFormErr: + return "Format Error" + case DNSResponseCodeServFail: + return "Server Failure " + case DNSResponseCodeNXDomain: + return "Non-Existent Domain" + case DNSResponseCodeNotImp: + return "Not Implemented" + case DNSResponseCodeRefused: + return "Query Refused" + case DNSResponseCodeYXDomain: + return "Name Exists when it should not" + case DNSResponseCodeYXRRSet: + return "RR Set Exists when it should not" + case DNSResponseCodeNXRRSet: + return "RR Set that should exist does not" + case DNSResponseCodeNotAuth: + return "Server Not Authoritative for zone" + case DNSResponseCodeNotZone: + return "Name not contained in zone" + case DNSResponseCodeBadVers: + return "Bad OPT Version" + case DNSResponseCodeBadKey: + return "Key not recognized" + case DNSResponseCodeBadTime: + return "Signature out of time window" + case DNSResponseCodeBadMode: + return "Bad TKEY Mode" + case DNSResponseCodeBadName: + return "Duplicate key name" + case DNSResponseCodeBadAlg: + return "Algorithm not supported" + case DNSResponseCodeBadTruc: + return "Bad Truncation" + case DNSResponseCodeBadCookie: + return "Bad Cookie" + } +} + +// DNSOpCode defines a set of different operation types. +type DNSOpCode uint8 + +// DNSOpCode known values. +const ( + DNSOpCodeQuery DNSOpCode = 0 // Query [RFC1035] + DNSOpCodeIQuery DNSOpCode = 1 // Inverse Query Obsolete [RFC3425] + DNSOpCodeStatus DNSOpCode = 2 // Status [RFC1035] + DNSOpCodeNotify DNSOpCode = 4 // Notify [RFC1996] + DNSOpCodeUpdate DNSOpCode = 5 // Update [RFC2136] +) + +func (doc DNSOpCode) String() string { + switch doc { + default: + return "Unknown" + case DNSOpCodeQuery: + return "Query" + case DNSOpCodeIQuery: + return "Inverse Query" + case DNSOpCodeStatus: + return "Status" + case DNSOpCodeNotify: + return "Notify" + case DNSOpCodeUpdate: + return "Update" + } +} + +// DNS is specified in RFC 1034 / RFC 1035 +// +---------------------+ +// | Header | +// +---------------------+ +// | Question | the question for the name server +// +---------------------+ +// | Answer | RRs answering the question +// +---------------------+ +// | Authority | RRs pointing toward an authority +// +---------------------+ +// | Additional | RRs holding additional information +// +---------------------+ +// +// DNS Header +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | ID | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// |QR| Opcode |AA|TC|RD|RA| Z | RCODE | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | QDCOUNT | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | ANCOUNT | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | NSCOUNT | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | ARCOUNT | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +// DNS contains data from a single Domain Name Service packet. +type DNS struct { + BaseLayer + + // Header fields + ID uint16 + QR bool + OpCode DNSOpCode + + AA bool // Authoritative answer + TC bool // Truncated + RD bool // Recursion desired + RA bool // Recursion available + Z uint8 // Reserved for future use + + ResponseCode DNSResponseCode + QDCount uint16 // Number of questions to expect + ANCount uint16 // Number of answers to expect + NSCount uint16 // Number of authorities to expect + ARCount uint16 // Number of additional records to expect + + // Entries + Questions []DNSQuestion + Answers []DNSResourceRecord + Authorities []DNSResourceRecord + Additionals []DNSResourceRecord + + // buffer for doing name decoding. We use a single reusable buffer to avoid + // name decoding on a single object via multiple DecodeFromBytes calls + // requiring constant allocation of small byte slices. + buffer []byte +} + +// LayerType returns gopacket.LayerTypeDNS. +func (d *DNS) LayerType() gopacket.LayerType { return LayerTypeDNS } + +// decodeDNS decodes the byte slice into a DNS type. It also +// setups the application Layer in PacketBuilder. +func decodeDNS(data []byte, p gopacket.PacketBuilder) error { + d := &DNS{} + err := d.DecodeFromBytes(data, p) + if err != nil { + return err + } + p.AddLayer(d) + p.SetApplicationLayer(d) + return nil +} + +// DecodeFromBytes decodes the slice into the DNS struct. +func (d *DNS) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + d.buffer = d.buffer[:0] + + if len(data) < 12 { + df.SetTruncated() + return errDNSPacketTooShort + } + + // since there are no further layers, the baselayer's content is + // pointing to this layer + d.BaseLayer = BaseLayer{Contents: data[:len(data)]} + d.ID = binary.BigEndian.Uint16(data[:2]) + d.QR = data[2]&0x80 != 0 + d.OpCode = DNSOpCode(data[2]>>3) & 0x0F + d.AA = data[2]&0x04 != 0 + d.TC = data[2]&0x02 != 0 + d.RD = data[2]&0x01 != 0 + d.RA = data[3]&0x80 != 0 + d.Z = uint8(data[3]>>4) & 0x7 + d.ResponseCode = DNSResponseCode(data[3] & 0xF) + d.QDCount = binary.BigEndian.Uint16(data[4:6]) + d.ANCount = binary.BigEndian.Uint16(data[6:8]) + d.NSCount = binary.BigEndian.Uint16(data[8:10]) + d.ARCount = binary.BigEndian.Uint16(data[10:12]) + + d.Questions = d.Questions[:0] + d.Answers = d.Answers[:0] + d.Authorities = d.Authorities[:0] + d.Additionals = d.Additionals[:0] + + offset := 12 + var err error + for i := 0; i < int(d.QDCount); i++ { + var q DNSQuestion + if offset, err = q.decode(data, offset, df, &d.buffer); err != nil { + return err + } + d.Questions = append(d.Questions, q) + } + + // For some horrible reason, if we do the obvious thing in this loop: + // var r DNSResourceRecord + // if blah := r.decode(blah); err != nil { + // return err + // } + // d.Foo = append(d.Foo, r) + // the Go compiler thinks that 'r' escapes to the heap, causing a malloc for + // every Answer, Authority, and Additional. To get around this, we do + // something really silly: we append an empty resource record to our slice, + // then use the last value in the slice to call decode. Since the value is + // already in the slice, there's no WAY it can escape... on the other hand our + // code is MUCH uglier :( + for i := 0; i < int(d.ANCount); i++ { + d.Answers = append(d.Answers, DNSResourceRecord{}) + if offset, err = d.Answers[i].decode(data, offset, df, &d.buffer); err != nil { + d.Answers = d.Answers[:i] // strip off erroneous value + return err + } + } + for i := 0; i < int(d.NSCount); i++ { + d.Authorities = append(d.Authorities, DNSResourceRecord{}) + if offset, err = d.Authorities[i].decode(data, offset, df, &d.buffer); err != nil { + d.Authorities = d.Authorities[:i] // strip off erroneous value + return err + } + } + for i := 0; i < int(d.ARCount); i++ { + d.Additionals = append(d.Additionals, DNSResourceRecord{}) + if offset, err = d.Additionals[i].decode(data, offset, df, &d.buffer); err != nil { + d.Additionals = d.Additionals[:i] // strip off erroneous value + return err + } + // extract extended RCODE from OPT RRs, RFC 6891 section 6.1.3 + if d.Additionals[i].Type == DNSTypeOPT { + d.ResponseCode = DNSResponseCode(uint8(d.ResponseCode) | uint8(d.Additionals[i].TTL>>20&0xF0)) + } + } + + if uint16(len(d.Questions)) != d.QDCount { + return errDecodeQueryBadQDCount + } else if uint16(len(d.Answers)) != d.ANCount { + return errDecodeQueryBadANCount + } else if uint16(len(d.Authorities)) != d.NSCount { + return errDecodeQueryBadNSCount + } else if uint16(len(d.Additionals)) != d.ARCount { + return errDecodeQueryBadARCount + } + return nil +} + +// CanDecode implements gopacket.DecodingLayer. +func (d *DNS) CanDecode() gopacket.LayerClass { + return LayerTypeDNS +} + +// NextLayerType implements gopacket.DecodingLayer. +func (d *DNS) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +// Payload returns nil. +func (d *DNS) Payload() []byte { + return nil +} + +func b2i(b bool) int { + if b { + return 1 + } + return 0 +} + +func recSize(rr *DNSResourceRecord) int { + switch rr.Type { + case DNSTypeA: + return 4 + case DNSTypeAAAA: + return 16 + case DNSTypeNS: + return len(rr.NS) + 2 + case DNSTypeCNAME: + return len(rr.CNAME) + 2 + case DNSTypePTR: + return len(rr.PTR) + 2 + case DNSTypeSOA: + return len(rr.SOA.MName) + 2 + len(rr.SOA.RName) + 2 + 20 + case DNSTypeMX: + return 2 + len(rr.MX.Name) + 2 + case DNSTypeTXT: + l := len(rr.TXTs) + for _, txt := range rr.TXTs { + l += len(txt) + } + return l + case DNSTypeSRV: + return 6 + len(rr.SRV.Name) + 2 + case DNSTypeURI: + return 4 + len(rr.URI.Target) + case DNSTypeOPT: + l := len(rr.OPT) * 4 + for _, opt := range rr.OPT { + l += len(opt.Data) + } + return l + } + + return 0 +} + +func computeSize(recs []DNSResourceRecord) int { + sz := 0 + for _, rr := range recs { + v := len(rr.Name) + + if v == 0 { + sz += v + 11 + } else { + sz += v + 12 + } + + sz += recSize(&rr) + } + return sz +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +func (d *DNS) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + dsz := 0 + for _, q := range d.Questions { + dsz += len(q.Name) + 6 + } + dsz += computeSize(d.Answers) + dsz += computeSize(d.Authorities) + dsz += computeSize(d.Additionals) + + bytes, err := b.PrependBytes(12 + dsz) + if err != nil { + return err + } + binary.BigEndian.PutUint16(bytes, d.ID) + bytes[2] = byte((b2i(d.QR) << 7) | (int(d.OpCode) << 3) | (b2i(d.AA) << 2) | (b2i(d.TC) << 1) | b2i(d.RD)) + bytes[3] = byte((b2i(d.RA) << 7) | (int(d.Z) << 4) | int(d.ResponseCode)) + + if opts.FixLengths { + d.QDCount = uint16(len(d.Questions)) + d.ANCount = uint16(len(d.Answers)) + d.NSCount = uint16(len(d.Authorities)) + d.ARCount = uint16(len(d.Additionals)) + } + binary.BigEndian.PutUint16(bytes[4:], d.QDCount) + binary.BigEndian.PutUint16(bytes[6:], d.ANCount) + binary.BigEndian.PutUint16(bytes[8:], d.NSCount) + binary.BigEndian.PutUint16(bytes[10:], d.ARCount) + + off := 12 + for _, qd := range d.Questions { + n := qd.encode(bytes, off) + off += n + } + + for i := range d.Answers { + // done this way so we can modify DNSResourceRecord to fix + // lengths if requested + qa := &d.Answers[i] + n, err := qa.encode(bytes, off, opts) + if err != nil { + return err + } + off += n + } + + for i := range d.Authorities { + qa := &d.Authorities[i] + n, err := qa.encode(bytes, off, opts) + if err != nil { + return err + } + off += n + } + for i := range d.Additionals { + qa := &d.Additionals[i] + n, err := qa.encode(bytes, off, opts) + if err != nil { + return err + } + off += n + } + + return nil +} + +const maxRecursionLevel = 255 + +func decodeName(data []byte, offset int, buffer *[]byte, level int) ([]byte, int, error) { + if level > maxRecursionLevel { + return nil, 0, errMaxRecursion + } else if offset >= len(data) { + return nil, 0, errDNSNameOffsetTooHigh + } else if offset < 0 { + return nil, 0, errDNSNameOffsetNegative + } + start := len(*buffer) + index := offset + if data[index] == 0x00 { + return nil, index + 1, nil + } +loop: + for data[index] != 0x00 { + switch data[index] & 0xc0 { + default: + /* RFC 1035 + A domain name represented as a sequence of labels, where + each label consists of a length octet followed by that + number of octets. The domain name terminates with the + zero length octet for the null label of the root. Note + that this field may be an odd number of octets; no + padding is used. + */ + index2 := index + int(data[index]) + 1 + if index2-offset > 255 { + return nil, 0, errDNSNameTooLong + } else if index2 < index+1 || index2 > len(data) { + return nil, 0, errDNSNameInvalidIndex + } + *buffer = append(*buffer, '.') + *buffer = append(*buffer, data[index+1:index2]...) + index = index2 + + case 0xc0: + /* RFC 1035 + The pointer takes the form of a two octet sequence. + + The first two bits are ones. This allows a pointer to + be distinguished from a label, since the label must + begin with two zero bits because labels are restricted + to 63 octets or less. (The 10 and 01 combinations are + reserved for future use.) The OFFSET field specifies + an offset from the start of the message (i.e., the + first octet of the ID field in the domain header). A + zero offset specifies the first byte of the ID field, + etc. + + The compression scheme allows a domain name in a message to be + represented as either: + - a sequence of labels ending in a zero octet + - a pointer + - a sequence of labels ending with a pointer + */ + if index+2 > len(data) { + return nil, 0, errDNSPointerOffsetTooHigh + } + offsetp := int(binary.BigEndian.Uint16(data[index:index+2]) & 0x3fff) + if offsetp > len(data) { + return nil, 0, errDNSPointerOffsetTooHigh + } + // This looks a little tricky, but actually isn't. Because of how + // decodeName is written, calling it appends the decoded name to the + // current buffer. We already have the start of the buffer, then, so + // once this call is done buffer[start:] will contain our full name. + _, _, err := decodeName(data, offsetp, buffer, level+1) + if err != nil { + return nil, 0, err + } + index++ // pointer is two bytes, so add an extra byte here. + break loop + /* EDNS, or other DNS option ? */ + case 0x40: // RFC 2673 + return nil, 0, fmt.Errorf("qname '0x40' - RFC 2673 unsupported yet (data=%x index=%d)", + data[index], index) + + case 0x80: + return nil, 0, fmt.Errorf("qname '0x80' unsupported yet (data=%x index=%d)", + data[index], index) + } + if index >= len(data) { + return nil, 0, errDNSIndexOutOfRange + } + } + if len(*buffer) <= start { + return (*buffer)[start:], index + 1, nil + } + return (*buffer)[start+1:], index + 1, nil +} + +// DNSQuestion wraps a single request (question) within a DNS query. +type DNSQuestion struct { + Name []byte + Type DNSType + Class DNSClass +} + +func (q *DNSQuestion) decode(data []byte, offset int, df gopacket.DecodeFeedback, buffer *[]byte) (int, error) { + name, endq, err := decodeName(data, offset, buffer, 1) + if err != nil { + return 0, err + } + + q.Name = name + q.Type = DNSType(binary.BigEndian.Uint16(data[endq : endq+2])) + q.Class = DNSClass(binary.BigEndian.Uint16(data[endq+2 : endq+4])) + + return endq + 4, nil +} + +func (q *DNSQuestion) encode(data []byte, offset int) int { + noff := encodeName(q.Name, data, offset) + nSz := noff - offset + binary.BigEndian.PutUint16(data[noff:], uint16(q.Type)) + binary.BigEndian.PutUint16(data[noff+2:], uint16(q.Class)) + return nSz + 4 +} + +// DNSResourceRecord +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | | +// / / +// / NAME / +// | | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | TYPE | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | CLASS | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | TTL | +// | | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | RDLENGTH | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--| +// / RDATA / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +// DNSResourceRecord wraps the data from a single DNS resource within a +// response. +type DNSResourceRecord struct { + // Header + Name []byte + Type DNSType + Class DNSClass + TTL uint32 + + // RDATA Raw Values + DataLength uint16 + Data []byte + + // RDATA Decoded Values + IP net.IP + NS, CNAME, PTR []byte + TXTs [][]byte + SOA DNSSOA + SRV DNSSRV + MX DNSMX + OPT []DNSOPT // See RFC 6891, section 6.1.2 + URI DNSURI + + // Undecoded TXT for backward compatibility + TXT []byte +} + +// decode decodes the resource record, returning the total length of the record. +func (rr *DNSResourceRecord) decode(data []byte, offset int, df gopacket.DecodeFeedback, buffer *[]byte) (int, error) { + name, endq, err := decodeName(data, offset, buffer, 1) + if err != nil { + return 0, err + } + + rr.Name = name + rr.Type = DNSType(binary.BigEndian.Uint16(data[endq : endq+2])) + rr.Class = DNSClass(binary.BigEndian.Uint16(data[endq+2 : endq+4])) + rr.TTL = binary.BigEndian.Uint32(data[endq+4 : endq+8]) + rr.DataLength = binary.BigEndian.Uint16(data[endq+8 : endq+10]) + end := endq + 10 + int(rr.DataLength) + if end > len(data) { + return 0, errDecodeRecordLength + } + rr.Data = data[endq+10 : end] + + if err = rr.decodeRData(data[:end], endq+10, buffer); err != nil { + return 0, err + } + + return endq + 10 + int(rr.DataLength), nil +} + +func encodeName(name []byte, data []byte, offset int) int { + l := 0 + for i := range name { + if name[i] == '.' { + data[offset+i-l] = byte(l) + l = 0 + } else { + // skip one to write the length + data[offset+i+1] = name[i] + l++ + } + } + + if len(name) == 0 { + data[offset] = 0x00 // terminal + return offset + 1 + } + + // length for final portion + data[offset+len(name)-l] = byte(l) + data[offset+len(name)+1] = 0x00 // terminal + return offset + len(name) + 2 +} + +func (rr *DNSResourceRecord) encode(data []byte, offset int, opts gopacket.SerializeOptions) (int, error) { + + noff := encodeName(rr.Name, data, offset) + nSz := noff - offset + + binary.BigEndian.PutUint16(data[noff:], uint16(rr.Type)) + binary.BigEndian.PutUint16(data[noff+2:], uint16(rr.Class)) + binary.BigEndian.PutUint32(data[noff+4:], uint32(rr.TTL)) + + switch rr.Type { + case DNSTypeA: + copy(data[noff+10:], rr.IP.To4()) + case DNSTypeAAAA: + copy(data[noff+10:], rr.IP) + case DNSTypeNS: + encodeName(rr.NS, data, noff+10) + case DNSTypeCNAME: + encodeName(rr.CNAME, data, noff+10) + case DNSTypePTR: + encodeName(rr.PTR, data, noff+10) + case DNSTypeSOA: + noff2 := encodeName(rr.SOA.MName, data, noff+10) + noff2 = encodeName(rr.SOA.RName, data, noff2) + binary.BigEndian.PutUint32(data[noff2:], rr.SOA.Serial) + binary.BigEndian.PutUint32(data[noff2+4:], rr.SOA.Refresh) + binary.BigEndian.PutUint32(data[noff2+8:], rr.SOA.Retry) + binary.BigEndian.PutUint32(data[noff2+12:], rr.SOA.Expire) + binary.BigEndian.PutUint32(data[noff2+16:], rr.SOA.Minimum) + case DNSTypeMX: + binary.BigEndian.PutUint16(data[noff+10:], rr.MX.Preference) + encodeName(rr.MX.Name, data, noff+12) + case DNSTypeTXT: + noff2 := noff + 10 + for _, txt := range rr.TXTs { + data[noff2] = byte(len(txt)) + copy(data[noff2+1:], txt) + noff2 += 1 + len(txt) + } + case DNSTypeSRV: + binary.BigEndian.PutUint16(data[noff+10:], rr.SRV.Priority) + binary.BigEndian.PutUint16(data[noff+12:], rr.SRV.Weight) + binary.BigEndian.PutUint16(data[noff+14:], rr.SRV.Port) + encodeName(rr.SRV.Name, data, noff+16) + case DNSTypeURI: + binary.BigEndian.PutUint16(data[noff+10:], rr.URI.Priority) + binary.BigEndian.PutUint16(data[noff+12:], rr.URI.Weight) + copy(data[noff+14:], rr.URI.Target) + case DNSTypeOPT: + noff2 := noff + 10 + for _, opt := range rr.OPT { + binary.BigEndian.PutUint16(data[noff2:], uint16(opt.Code)) + binary.BigEndian.PutUint16(data[noff2+2:], uint16(len(opt.Data))) + copy(data[noff2+4:], opt.Data) + noff2 += 4 + len(opt.Data) + } + default: + return 0, fmt.Errorf("serializing resource record of type %v not supported", rr.Type) + } + + // DataLength + dSz := recSize(rr) + binary.BigEndian.PutUint16(data[noff+8:], uint16(dSz)) + + if opts.FixLengths { + rr.DataLength = uint16(dSz) + } + + return nSz + 10 + dSz, nil +} + +func (rr *DNSResourceRecord) String() string { + + if rr.Type == DNSTypeOPT { + opts := make([]string, len(rr.OPT)) + for i, opt := range rr.OPT { + opts[i] = opt.String() + } + return "OPT " + strings.Join(opts, ",") + } + if rr.Type == DNSTypeURI { + return fmt.Sprintf("URI %d %d %s", rr.URI.Priority, rr.URI.Weight, string(rr.URI.Target)) + } + if rr.Class == DNSClassIN { + switch rr.Type { + case DNSTypeA, DNSTypeAAAA: + return rr.IP.String() + case DNSTypeNS: + return "NS " + string(rr.NS) + case DNSTypeCNAME: + return "CNAME " + string(rr.CNAME) + case DNSTypePTR: + return "PTR " + string(rr.PTR) + case DNSTypeTXT: + return "TXT " + string(rr.TXT) + } + } + + return fmt.Sprintf("<%v, %v>", rr.Class, rr.Type) +} + +func decodeCharacterStrings(data []byte) ([][]byte, error) { + strings := make([][]byte, 0, 1) + end := len(data) + for index, index2 := 0, 0; index != end; index = index2 { + index2 = index + 1 + int(data[index]) // index increases by 1..256 and does not overflow + if index2 > end { + return nil, errCharStringMissData + } + strings = append(strings, data[index+1:index2]) + } + return strings, nil +} + +func decodeOPTs(data []byte, offset int) ([]DNSOPT, error) { + allOPT := []DNSOPT{} + end := len(data) + + if offset == end { + return allOPT, nil // There is no data to read + } + + if offset+4 > end { + return allOPT, fmt.Errorf("DNSOPT record is of length %d, it should be at least length 4", end-offset) + } + + for i := offset; i < end; { + opt := DNSOPT{} + if len(data) < i+4 { + return allOPT, fmt.Errorf("Malformed DNSOPT record. Length %d < %d", len(data), i+4) + } + opt.Code = DNSOptionCode(binary.BigEndian.Uint16(data[i : i+2])) + l := binary.BigEndian.Uint16(data[i+2 : i+4]) + if i+4+int(l) > end { + return allOPT, fmt.Errorf("Malformed DNSOPT record. The length (%d) field implies a packet larger than the one received", l) + } + opt.Data = data[i+4 : i+4+int(l)] + allOPT = append(allOPT, opt) + i += int(l) + 4 + } + return allOPT, nil +} + +func (rr *DNSResourceRecord) decodeRData(data []byte, offset int, buffer *[]byte) error { + switch rr.Type { + case DNSTypeA: + rr.IP = rr.Data + case DNSTypeAAAA: + rr.IP = rr.Data + case DNSTypeTXT, DNSTypeHINFO: + rr.TXT = rr.Data + txts, err := decodeCharacterStrings(rr.Data) + if err != nil { + return err + } + rr.TXTs = txts + case DNSTypeNS: + name, _, err := decodeName(data, offset, buffer, 1) + if err != nil { + return err + } + rr.NS = name + case DNSTypeCNAME: + name, _, err := decodeName(data, offset, buffer, 1) + if err != nil { + return err + } + rr.CNAME = name + case DNSTypePTR: + name, _, err := decodeName(data, offset, buffer, 1) + if err != nil { + return err + } + rr.PTR = name + case DNSTypeSOA: + name, endq, err := decodeName(data, offset, buffer, 1) + if err != nil { + return err + } + rr.SOA.MName = name + name, endq, err = decodeName(data, endq, buffer, 1) + if err != nil { + return err + } + if len(data) < endq+20 { + return errors.New("SOA too small") + } + rr.SOA.RName = name + rr.SOA.Serial = binary.BigEndian.Uint32(data[endq : endq+4]) + rr.SOA.Refresh = binary.BigEndian.Uint32(data[endq+4 : endq+8]) + rr.SOA.Retry = binary.BigEndian.Uint32(data[endq+8 : endq+12]) + rr.SOA.Expire = binary.BigEndian.Uint32(data[endq+12 : endq+16]) + rr.SOA.Minimum = binary.BigEndian.Uint32(data[endq+16 : endq+20]) + case DNSTypeMX: + if len(data) < offset+2 { + return errors.New("MX too small") + } + rr.MX.Preference = binary.BigEndian.Uint16(data[offset : offset+2]) + name, _, err := decodeName(data, offset+2, buffer, 1) + if err != nil { + return err + } + rr.MX.Name = name + case DNSTypeURI: + if len(rr.Data) < 4 { + return errors.New("URI too small") + } + rr.URI.Priority = binary.BigEndian.Uint16(data[offset : offset+2]) + rr.URI.Weight = binary.BigEndian.Uint16(data[offset+2 : offset+4]) + rr.URI.Target = rr.Data[4:] + case DNSTypeSRV: + if len(data) < offset+6 { + return errors.New("SRV too small") + } + rr.SRV.Priority = binary.BigEndian.Uint16(data[offset : offset+2]) + rr.SRV.Weight = binary.BigEndian.Uint16(data[offset+2 : offset+4]) + rr.SRV.Port = binary.BigEndian.Uint16(data[offset+4 : offset+6]) + name, _, err := decodeName(data, offset+6, buffer, 1) + if err != nil { + return err + } + rr.SRV.Name = name + case DNSTypeOPT: + allOPT, err := decodeOPTs(data, offset) + if err != nil { + return err + } + rr.OPT = allOPT + } + return nil +} + +// DNSSOA is a Start of Authority record. Each domain requires a SOA record at +// the cutover where a domain is delegated from its parent. +type DNSSOA struct { + MName, RName []byte + Serial, Refresh, Retry, Expire, Minimum uint32 +} + +// DNSSRV is a Service record, defining a location (hostname/port) of a +// server/service. +type DNSSRV struct { + Priority, Weight, Port uint16 + Name []byte +} + +// DNSMX is a mail exchange record, defining a mail server for a recipient's +// domain. +type DNSMX struct { + Preference uint16 + Name []byte +} + +// DNSURI is a URI record, defining a target (URI) of a server/service +type DNSURI struct { + Priority, Weight uint16 + Target []byte +} + +// DNSOptionCode represents the code of a DNS Option, see RFC6891, section 6.1.2 +type DNSOptionCode uint16 + +func (doc DNSOptionCode) String() string { + switch doc { + default: + return "Unknown" + case DNSOptionCodeNSID: + return "NSID" + case DNSOptionCodeDAU: + return "DAU" + case DNSOptionCodeDHU: + return "DHU" + case DNSOptionCodeN3U: + return "N3U" + case DNSOptionCodeEDNSClientSubnet: + return "EDNSClientSubnet" + case DNSOptionCodeEDNSExpire: + return "EDNSExpire" + case DNSOptionCodeCookie: + return "Cookie" + case DNSOptionCodeEDNSKeepAlive: + return "EDNSKeepAlive" + case DNSOptionCodePadding: + return "CodePadding" + case DNSOptionCodeChain: + return "CodeChain" + case DNSOptionCodeEDNSKeyTag: + return "CodeEDNSKeyTag" + case DNSOptionCodeEDNSClientTag: + return "EDNSClientTag" + case DNSOptionCodeEDNSServerTag: + return "EDNSServerTag" + case DNSOptionCodeDeviceID: + return "DeviceID" + } +} + +// DNSOptionCode known values. See IANA +const ( + DNSOptionCodeNSID DNSOptionCode = 3 + DNSOptionCodeDAU DNSOptionCode = 5 + DNSOptionCodeDHU DNSOptionCode = 6 + DNSOptionCodeN3U DNSOptionCode = 7 + DNSOptionCodeEDNSClientSubnet DNSOptionCode = 8 + DNSOptionCodeEDNSExpire DNSOptionCode = 9 + DNSOptionCodeCookie DNSOptionCode = 10 + DNSOptionCodeEDNSKeepAlive DNSOptionCode = 11 + DNSOptionCodePadding DNSOptionCode = 12 + DNSOptionCodeChain DNSOptionCode = 13 + DNSOptionCodeEDNSKeyTag DNSOptionCode = 14 + DNSOptionCodeEDNSClientTag DNSOptionCode = 16 + DNSOptionCodeEDNSServerTag DNSOptionCode = 17 + DNSOptionCodeDeviceID DNSOptionCode = 26946 +) + +// DNSOPT is a DNS Option, see RFC6891, section 6.1.2 +type DNSOPT struct { + Code DNSOptionCode + Data []byte +} + +func (opt DNSOPT) String() string { + return fmt.Sprintf("%s=%x", opt.Code, opt.Data) +} + +var ( + errMaxRecursion = errors.New("max DNS recursion level hit") + + errDNSNameOffsetTooHigh = errors.New("dns name offset too high") + errDNSNameOffsetNegative = errors.New("dns name offset is negative") + errDNSPacketTooShort = errors.New("DNS packet too short") + errDNSNameTooLong = errors.New("dns name is too long") + errDNSNameInvalidIndex = errors.New("dns name uncomputable: invalid index") + errDNSPointerOffsetTooHigh = errors.New("dns offset pointer too high") + errDNSIndexOutOfRange = errors.New("dns index walked out of range") + errDNSNameHasNoData = errors.New("no dns data found for name") + + errCharStringMissData = errors.New("Insufficient data for a ") + + errDecodeRecordLength = errors.New("resource record length exceeds data") + + errDecodeQueryBadQDCount = errors.New("Invalid query decoding, not the right number of questions") + errDecodeQueryBadANCount = errors.New("Invalid query decoding, not the right number of answers") + errDecodeQueryBadNSCount = errors.New("Invalid query decoding, not the right number of authorities") + errDecodeQueryBadARCount = errors.New("Invalid query decoding, not the right number of additionals info") +) diff --git a/backend/vendor/github.com/google/gopacket/layers/doc.go b/backend/vendor/github.com/google/gopacket/layers/doc.go new file mode 100644 index 0000000..3c882c3 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/doc.go @@ -0,0 +1,61 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +/* +Package layers provides decoding layers for many common protocols. + +The layers package contains decode implementations for a number of different +types of packet layers. Users of gopacket will almost always want to also use +layers to actually decode packet data into useful pieces. To see the set of +protocols that gopacket/layers is currently able to decode, +look at the set of LayerTypes defined in the Variables sections. The +layers package also defines endpoints for many of the common packet layers +that have source/destination addresses associated with them, for example IPv4/6 +(IPs) and TCP/UDP (ports). +Finally, layers contains a number of useful enumerations (IPProtocol, +EthernetType, LinkType, PPPType, etc...). Many of these implement the +gopacket.Decoder interface, so they can be passed into gopacket as decoders. + +Most common protocol layers are named using acronyms or other industry-common +names (IPv4, TCP, PPP). Some of the less common ones have their names expanded +(CiscoDiscoveryProtocol). +For certain protocols, sub-parts of the protocol are split out into their own +layers (SCTP, for example). This is done mostly in cases where portions of the +protocol may fulfill the capabilities of interesting layers (SCTPData implements +ApplicationLayer, while base SCTP implements TransportLayer), or possibly +because splitting a protocol into a few layers makes decoding easier. + +This package is meant to be used with its parent, +http://github.com/google/gopacket. + +Port Types + +Instead of using raw uint16 or uint8 values for ports, we use a different port +type for every protocol, for example TCPPort and UDPPort. This allows us to +override string behavior for each port, which we do by setting up port name +maps (TCPPortNames, UDPPortNames, etc...). Well-known ports are annotated with +their protocol names, and their String function displays these names: + + p := TCPPort(80) + fmt.Printf("Number: %d String: %v", p, p) + // Prints: "Number: 80 String: 80(http)" + +Modifying Decode Behavior + +layers links together decoding through its enumerations. For example, after +decoding layer type Ethernet, it uses Ethernet.EthernetType as its next decoder. +All enumerations that act as decoders, like EthernetType, can be modified by +users depending on their preferences. For example, if you have a spiffy new +IPv4 decoder that works way better than the one built into layers, you can do +this: + + var mySpiffyIPv4Decoder gopacket.Decoder = ... + layers.EthernetTypeMetadata[EthernetTypeIPv4].DecodeWith = mySpiffyIPv4Decoder + +This will make all future ethernet packets use your new decoder to decode IPv4 +packets, instead of the built-in decoder used by gopacket. +*/ +package layers diff --git a/backend/vendor/github.com/google/gopacket/layers/dot11.go b/backend/vendor/github.com/google/gopacket/layers/dot11.go new file mode 100644 index 0000000..3e64910 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/dot11.go @@ -0,0 +1,2118 @@ +// Copyright 2014 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +// See http://standards.ieee.org/findstds/standard/802.11-2012.html for info on +// all of the layers in this file. + +package layers + +import ( + "bytes" + "encoding/binary" + "fmt" + "hash/crc32" + "net" + + "github.com/google/gopacket" +) + +// Dot11Flags contains the set of 8 flags in the IEEE 802.11 frame control +// header, all in one place. +type Dot11Flags uint8 + +const ( + Dot11FlagsToDS Dot11Flags = 1 << iota + Dot11FlagsFromDS + Dot11FlagsMF + Dot11FlagsRetry + Dot11FlagsPowerManagement + Dot11FlagsMD + Dot11FlagsWEP + Dot11FlagsOrder +) + +func (d Dot11Flags) ToDS() bool { + return d&Dot11FlagsToDS != 0 +} +func (d Dot11Flags) FromDS() bool { + return d&Dot11FlagsFromDS != 0 +} +func (d Dot11Flags) MF() bool { + return d&Dot11FlagsMF != 0 +} +func (d Dot11Flags) Retry() bool { + return d&Dot11FlagsRetry != 0 +} +func (d Dot11Flags) PowerManagement() bool { + return d&Dot11FlagsPowerManagement != 0 +} +func (d Dot11Flags) MD() bool { + return d&Dot11FlagsMD != 0 +} +func (d Dot11Flags) WEP() bool { + return d&Dot11FlagsWEP != 0 +} +func (d Dot11Flags) Order() bool { + return d&Dot11FlagsOrder != 0 +} + +// String provides a human readable string for Dot11Flags. +// This string is possibly subject to change over time; if you're storing this +// persistently, you should probably store the Dot11Flags value, not its string. +func (a Dot11Flags) String() string { + var out bytes.Buffer + if a.ToDS() { + out.WriteString("TO-DS,") + } + if a.FromDS() { + out.WriteString("FROM-DS,") + } + if a.MF() { + out.WriteString("MF,") + } + if a.Retry() { + out.WriteString("Retry,") + } + if a.PowerManagement() { + out.WriteString("PowerManagement,") + } + if a.MD() { + out.WriteString("MD,") + } + if a.WEP() { + out.WriteString("WEP,") + } + if a.Order() { + out.WriteString("Order,") + } + + if length := out.Len(); length > 0 { + return string(out.Bytes()[:length-1]) // strip final comma + } + return "" +} + +type Dot11Reason uint16 + +// TODO: Verify these reasons, and append more reasons if necessary. + +const ( + Dot11ReasonReserved Dot11Reason = 1 + Dot11ReasonUnspecified Dot11Reason = 2 + Dot11ReasonAuthExpired Dot11Reason = 3 + Dot11ReasonDeauthStLeaving Dot11Reason = 4 + Dot11ReasonInactivity Dot11Reason = 5 + Dot11ReasonApFull Dot11Reason = 6 + Dot11ReasonClass2FromNonAuth Dot11Reason = 7 + Dot11ReasonClass3FromNonAss Dot11Reason = 8 + Dot11ReasonDisasStLeaving Dot11Reason = 9 + Dot11ReasonStNotAuth Dot11Reason = 10 +) + +// String provides a human readable string for Dot11Reason. +// This string is possibly subject to change over time; if you're storing this +// persistently, you should probably store the Dot11Reason value, not its string. +func (a Dot11Reason) String() string { + switch a { + case Dot11ReasonReserved: + return "Reserved" + case Dot11ReasonUnspecified: + return "Unspecified" + case Dot11ReasonAuthExpired: + return "Auth. expired" + case Dot11ReasonDeauthStLeaving: + return "Deauth. st. leaving" + case Dot11ReasonInactivity: + return "Inactivity" + case Dot11ReasonApFull: + return "Ap. full" + case Dot11ReasonClass2FromNonAuth: + return "Class2 from non auth." + case Dot11ReasonClass3FromNonAss: + return "Class3 from non ass." + case Dot11ReasonDisasStLeaving: + return "Disass st. leaving" + case Dot11ReasonStNotAuth: + return "St. not auth." + default: + return "Unknown reason" + } +} + +type Dot11Status uint16 + +const ( + Dot11StatusSuccess Dot11Status = 0 + Dot11StatusFailure Dot11Status = 1 // Unspecified failure + Dot11StatusCannotSupportAllCapabilities Dot11Status = 10 // Cannot support all requested capabilities in the Capability Information field + Dot11StatusInabilityExistsAssociation Dot11Status = 11 // Reassociation denied due to inability to confirm that association exists + Dot11StatusAssociationDenied Dot11Status = 12 // Association denied due to reason outside the scope of this standard + Dot11StatusAlgorithmUnsupported Dot11Status = 13 // Responding station does not support the specified authentication algorithm + Dot11StatusOufOfExpectedSequence Dot11Status = 14 // Received an Authentication frame with authentication transaction sequence number out of expected sequence + Dot11StatusChallengeFailure Dot11Status = 15 // Authentication rejected because of challenge failure + Dot11StatusTimeout Dot11Status = 16 // Authentication rejected due to timeout waiting for next frame in sequence + Dot11StatusAPUnableToHandle Dot11Status = 17 // Association denied because AP is unable to handle additional associated stations + Dot11StatusRateUnsupported Dot11Status = 18 // Association denied due to requesting station not supporting all of the data rates in the BSSBasicRateSet parameter +) + +// String provides a human readable string for Dot11Status. +// This string is possibly subject to change over time; if you're storing this +// persistently, you should probably store the Dot11Status value, not its string. +func (a Dot11Status) String() string { + switch a { + case Dot11StatusSuccess: + return "success" + case Dot11StatusFailure: + return "failure" + case Dot11StatusCannotSupportAllCapabilities: + return "cannot-support-all-capabilities" + case Dot11StatusInabilityExistsAssociation: + return "inability-exists-association" + case Dot11StatusAssociationDenied: + return "association-denied" + case Dot11StatusAlgorithmUnsupported: + return "algorithm-unsupported" + case Dot11StatusOufOfExpectedSequence: + return "out-of-expected-sequence" + case Dot11StatusChallengeFailure: + return "challenge-failure" + case Dot11StatusTimeout: + return "timeout" + case Dot11StatusAPUnableToHandle: + return "ap-unable-to-handle" + case Dot11StatusRateUnsupported: + return "rate-unsupported" + default: + return "unknown status" + } +} + +type Dot11AckPolicy uint8 + +const ( + Dot11AckPolicyNormal Dot11AckPolicy = 0 + Dot11AckPolicyNone Dot11AckPolicy = 1 + Dot11AckPolicyNoExplicit Dot11AckPolicy = 2 + Dot11AckPolicyBlock Dot11AckPolicy = 3 +) + +// String provides a human readable string for Dot11AckPolicy. +// This string is possibly subject to change over time; if you're storing this +// persistently, you should probably store the Dot11AckPolicy value, not its string. +func (a Dot11AckPolicy) String() string { + switch a { + case Dot11AckPolicyNormal: + return "normal-ack" + case Dot11AckPolicyNone: + return "no-ack" + case Dot11AckPolicyNoExplicit: + return "no-explicit-ack" + case Dot11AckPolicyBlock: + return "block-ack" + default: + return "unknown-ack-policy" + } +} + +type Dot11Algorithm uint16 + +const ( + Dot11AlgorithmOpen Dot11Algorithm = 0 + Dot11AlgorithmSharedKey Dot11Algorithm = 1 +) + +// String provides a human readable string for Dot11Algorithm. +// This string is possibly subject to change over time; if you're storing this +// persistently, you should probably store the Dot11Algorithm value, not its string. +func (a Dot11Algorithm) String() string { + switch a { + case Dot11AlgorithmOpen: + return "open" + case Dot11AlgorithmSharedKey: + return "shared-key" + default: + return "unknown-algorithm" + } +} + +type Dot11InformationElementID uint8 + +const ( + Dot11InformationElementIDSSID Dot11InformationElementID = 0 + Dot11InformationElementIDRates Dot11InformationElementID = 1 + Dot11InformationElementIDFHSet Dot11InformationElementID = 2 + Dot11InformationElementIDDSSet Dot11InformationElementID = 3 + Dot11InformationElementIDCFSet Dot11InformationElementID = 4 + Dot11InformationElementIDTIM Dot11InformationElementID = 5 + Dot11InformationElementIDIBSSSet Dot11InformationElementID = 6 + Dot11InformationElementIDCountryInfo Dot11InformationElementID = 7 + Dot11InformationElementIDHoppingPatternParam Dot11InformationElementID = 8 + Dot11InformationElementIDHoppingPatternTable Dot11InformationElementID = 9 + Dot11InformationElementIDRequest Dot11InformationElementID = 10 + Dot11InformationElementIDQBSSLoadElem Dot11InformationElementID = 11 + Dot11InformationElementIDEDCAParamSet Dot11InformationElementID = 12 + Dot11InformationElementIDTrafficSpec Dot11InformationElementID = 13 + Dot11InformationElementIDTrafficClass Dot11InformationElementID = 14 + Dot11InformationElementIDSchedule Dot11InformationElementID = 15 + Dot11InformationElementIDChallenge Dot11InformationElementID = 16 + Dot11InformationElementIDPowerConst Dot11InformationElementID = 32 + Dot11InformationElementIDPowerCapability Dot11InformationElementID = 33 + Dot11InformationElementIDTPCRequest Dot11InformationElementID = 34 + Dot11InformationElementIDTPCReport Dot11InformationElementID = 35 + Dot11InformationElementIDSupportedChannels Dot11InformationElementID = 36 + Dot11InformationElementIDSwitchChannelAnnounce Dot11InformationElementID = 37 + Dot11InformationElementIDMeasureRequest Dot11InformationElementID = 38 + Dot11InformationElementIDMeasureReport Dot11InformationElementID = 39 + Dot11InformationElementIDQuiet Dot11InformationElementID = 40 + Dot11InformationElementIDIBSSDFS Dot11InformationElementID = 41 + Dot11InformationElementIDERPInfo Dot11InformationElementID = 42 + Dot11InformationElementIDTSDelay Dot11InformationElementID = 43 + Dot11InformationElementIDTCLASProcessing Dot11InformationElementID = 44 + Dot11InformationElementIDHTCapabilities Dot11InformationElementID = 45 + Dot11InformationElementIDQOSCapability Dot11InformationElementID = 46 + Dot11InformationElementIDERPInfo2 Dot11InformationElementID = 47 + Dot11InformationElementIDRSNInfo Dot11InformationElementID = 48 + Dot11InformationElementIDESRates Dot11InformationElementID = 50 + Dot11InformationElementIDAPChannelReport Dot11InformationElementID = 51 + Dot11InformationElementIDNeighborReport Dot11InformationElementID = 52 + Dot11InformationElementIDRCPI Dot11InformationElementID = 53 + Dot11InformationElementIDMobilityDomain Dot11InformationElementID = 54 + Dot11InformationElementIDFastBSSTrans Dot11InformationElementID = 55 + Dot11InformationElementIDTimeoutInt Dot11InformationElementID = 56 + Dot11InformationElementIDRICData Dot11InformationElementID = 57 + Dot11InformationElementIDDSERegisteredLoc Dot11InformationElementID = 58 + Dot11InformationElementIDSuppOperatingClass Dot11InformationElementID = 59 + Dot11InformationElementIDExtChanSwitchAnnounce Dot11InformationElementID = 60 + Dot11InformationElementIDHTInfo Dot11InformationElementID = 61 + Dot11InformationElementIDSecChanOffset Dot11InformationElementID = 62 + Dot11InformationElementIDBSSAverageAccessDelay Dot11InformationElementID = 63 + Dot11InformationElementIDAntenna Dot11InformationElementID = 64 + Dot11InformationElementIDRSNI Dot11InformationElementID = 65 + Dot11InformationElementIDMeasurePilotTrans Dot11InformationElementID = 66 + Dot11InformationElementIDBSSAvailAdmCapacity Dot11InformationElementID = 67 + Dot11InformationElementIDBSSACAccDelayWAPIParam Dot11InformationElementID = 68 + Dot11InformationElementIDTimeAdvertisement Dot11InformationElementID = 69 + Dot11InformationElementIDRMEnabledCapabilities Dot11InformationElementID = 70 + Dot11InformationElementIDMultipleBSSID Dot11InformationElementID = 71 + Dot11InformationElementID2040BSSCoExist Dot11InformationElementID = 72 + Dot11InformationElementID2040BSSIntChanReport Dot11InformationElementID = 73 + Dot11InformationElementIDOverlapBSSScanParam Dot11InformationElementID = 74 + Dot11InformationElementIDRICDescriptor Dot11InformationElementID = 75 + Dot11InformationElementIDManagementMIC Dot11InformationElementID = 76 + Dot11InformationElementIDEventRequest Dot11InformationElementID = 78 + Dot11InformationElementIDEventReport Dot11InformationElementID = 79 + Dot11InformationElementIDDiagnosticRequest Dot11InformationElementID = 80 + Dot11InformationElementIDDiagnosticReport Dot11InformationElementID = 81 + Dot11InformationElementIDLocationParam Dot11InformationElementID = 82 + Dot11InformationElementIDNonTransBSSIDCapability Dot11InformationElementID = 83 + Dot11InformationElementIDSSIDList Dot11InformationElementID = 84 + Dot11InformationElementIDMultipleBSSIDIndex Dot11InformationElementID = 85 + Dot11InformationElementIDFMSDescriptor Dot11InformationElementID = 86 + Dot11InformationElementIDFMSRequest Dot11InformationElementID = 87 + Dot11InformationElementIDFMSResponse Dot11InformationElementID = 88 + Dot11InformationElementIDQOSTrafficCapability Dot11InformationElementID = 89 + Dot11InformationElementIDBSSMaxIdlePeriod Dot11InformationElementID = 90 + Dot11InformationElementIDTFSRequest Dot11InformationElementID = 91 + Dot11InformationElementIDTFSResponse Dot11InformationElementID = 92 + Dot11InformationElementIDWNMSleepMode Dot11InformationElementID = 93 + Dot11InformationElementIDTIMBroadcastRequest Dot11InformationElementID = 94 + Dot11InformationElementIDTIMBroadcastResponse Dot11InformationElementID = 95 + Dot11InformationElementIDCollInterferenceReport Dot11InformationElementID = 96 + Dot11InformationElementIDChannelUsage Dot11InformationElementID = 97 + Dot11InformationElementIDTimeZone Dot11InformationElementID = 98 + Dot11InformationElementIDDMSRequest Dot11InformationElementID = 99 + Dot11InformationElementIDDMSResponse Dot11InformationElementID = 100 + Dot11InformationElementIDLinkIdentifier Dot11InformationElementID = 101 + Dot11InformationElementIDWakeupSchedule Dot11InformationElementID = 102 + Dot11InformationElementIDChannelSwitchTiming Dot11InformationElementID = 104 + Dot11InformationElementIDPTIControl Dot11InformationElementID = 105 + Dot11InformationElementIDPUBufferStatus Dot11InformationElementID = 106 + Dot11InformationElementIDInterworking Dot11InformationElementID = 107 + Dot11InformationElementIDAdvertisementProtocol Dot11InformationElementID = 108 + Dot11InformationElementIDExpBWRequest Dot11InformationElementID = 109 + Dot11InformationElementIDQOSMapSet Dot11InformationElementID = 110 + Dot11InformationElementIDRoamingConsortium Dot11InformationElementID = 111 + Dot11InformationElementIDEmergencyAlertIdentifier Dot11InformationElementID = 112 + Dot11InformationElementIDMeshConfiguration Dot11InformationElementID = 113 + Dot11InformationElementIDMeshID Dot11InformationElementID = 114 + Dot11InformationElementIDMeshLinkMetricReport Dot11InformationElementID = 115 + Dot11InformationElementIDCongestionNotification Dot11InformationElementID = 116 + Dot11InformationElementIDMeshPeeringManagement Dot11InformationElementID = 117 + Dot11InformationElementIDMeshChannelSwitchParam Dot11InformationElementID = 118 + Dot11InformationElementIDMeshAwakeWindows Dot11InformationElementID = 119 + Dot11InformationElementIDBeaconTiming Dot11InformationElementID = 120 + Dot11InformationElementIDMCCAOPSetupRequest Dot11InformationElementID = 121 + Dot11InformationElementIDMCCAOPSetupReply Dot11InformationElementID = 122 + Dot11InformationElementIDMCCAOPAdvertisement Dot11InformationElementID = 123 + Dot11InformationElementIDMCCAOPTeardown Dot11InformationElementID = 124 + Dot11InformationElementIDGateAnnouncement Dot11InformationElementID = 125 + Dot11InformationElementIDRootAnnouncement Dot11InformationElementID = 126 + Dot11InformationElementIDExtCapability Dot11InformationElementID = 127 + Dot11InformationElementIDAgereProprietary Dot11InformationElementID = 128 + Dot11InformationElementIDPathRequest Dot11InformationElementID = 130 + Dot11InformationElementIDPathReply Dot11InformationElementID = 131 + Dot11InformationElementIDPathError Dot11InformationElementID = 132 + Dot11InformationElementIDCiscoCCX1CKIPDeviceName Dot11InformationElementID = 133 + Dot11InformationElementIDCiscoCCX2 Dot11InformationElementID = 136 + Dot11InformationElementIDProxyUpdate Dot11InformationElementID = 137 + Dot11InformationElementIDProxyUpdateConfirmation Dot11InformationElementID = 138 + Dot11InformationElementIDAuthMeshPerringExch Dot11InformationElementID = 139 + Dot11InformationElementIDMIC Dot11InformationElementID = 140 + Dot11InformationElementIDDestinationURI Dot11InformationElementID = 141 + Dot11InformationElementIDUAPSDCoexistence Dot11InformationElementID = 142 + Dot11InformationElementIDWakeupSchedule80211ad Dot11InformationElementID = 143 + Dot11InformationElementIDExtendedSchedule Dot11InformationElementID = 144 + Dot11InformationElementIDSTAAvailability Dot11InformationElementID = 145 + Dot11InformationElementIDDMGTSPEC Dot11InformationElementID = 146 + Dot11InformationElementIDNextDMGATI Dot11InformationElementID = 147 + Dot11InformationElementIDDMSCapabilities Dot11InformationElementID = 148 + Dot11InformationElementIDCiscoUnknown95 Dot11InformationElementID = 149 + Dot11InformationElementIDVendor2 Dot11InformationElementID = 150 + Dot11InformationElementIDDMGOperating Dot11InformationElementID = 151 + Dot11InformationElementIDDMGBSSParamChange Dot11InformationElementID = 152 + Dot11InformationElementIDDMGBeamRefinement Dot11InformationElementID = 153 + Dot11InformationElementIDChannelMeasFeedback Dot11InformationElementID = 154 + Dot11InformationElementIDAwakeWindow Dot11InformationElementID = 157 + Dot11InformationElementIDMultiBand Dot11InformationElementID = 158 + Dot11InformationElementIDADDBAExtension Dot11InformationElementID = 159 + Dot11InformationElementIDNEXTPCPList Dot11InformationElementID = 160 + Dot11InformationElementIDPCPHandover Dot11InformationElementID = 161 + Dot11InformationElementIDDMGLinkMargin Dot11InformationElementID = 162 + Dot11InformationElementIDSwitchingStream Dot11InformationElementID = 163 + Dot11InformationElementIDSessionTransmission Dot11InformationElementID = 164 + Dot11InformationElementIDDynamicTonePairReport Dot11InformationElementID = 165 + Dot11InformationElementIDClusterReport Dot11InformationElementID = 166 + Dot11InformationElementIDRelayCapabilities Dot11InformationElementID = 167 + Dot11InformationElementIDRelayTransferParameter Dot11InformationElementID = 168 + Dot11InformationElementIDBeamlinkMaintenance Dot11InformationElementID = 169 + Dot11InformationElementIDMultipleMacSublayers Dot11InformationElementID = 170 + Dot11InformationElementIDUPID Dot11InformationElementID = 171 + Dot11InformationElementIDDMGLinkAdaptionAck Dot11InformationElementID = 172 + Dot11InformationElementIDSymbolProprietary Dot11InformationElementID = 173 + Dot11InformationElementIDMCCAOPAdvertOverview Dot11InformationElementID = 174 + Dot11InformationElementIDQuietPeriodRequest Dot11InformationElementID = 175 + Dot11InformationElementIDQuietPeriodResponse Dot11InformationElementID = 177 + Dot11InformationElementIDECPACPolicy Dot11InformationElementID = 182 + Dot11InformationElementIDClusterTimeOffset Dot11InformationElementID = 183 + Dot11InformationElementIDAntennaSectorID Dot11InformationElementID = 190 + Dot11InformationElementIDVHTCapabilities Dot11InformationElementID = 191 + Dot11InformationElementIDVHTOperation Dot11InformationElementID = 192 + Dot11InformationElementIDExtendedBSSLoad Dot11InformationElementID = 193 + Dot11InformationElementIDWideBWChannelSwitch Dot11InformationElementID = 194 + Dot11InformationElementIDVHTTxPowerEnvelope Dot11InformationElementID = 195 + Dot11InformationElementIDChannelSwitchWrapper Dot11InformationElementID = 196 + Dot11InformationElementIDOperatingModeNotification Dot11InformationElementID = 199 + Dot11InformationElementIDUPSIM Dot11InformationElementID = 200 + Dot11InformationElementIDReducedNeighborReport Dot11InformationElementID = 201 + Dot11InformationElementIDTVHTOperation Dot11InformationElementID = 202 + Dot11InformationElementIDDeviceLocation Dot11InformationElementID = 204 + Dot11InformationElementIDWhiteSpaceMap Dot11InformationElementID = 205 + Dot11InformationElementIDFineTuningMeasureParams Dot11InformationElementID = 206 + Dot11InformationElementIDVendor Dot11InformationElementID = 221 +) + +// String provides a human readable string for Dot11InformationElementID. +// This string is possibly subject to change over time; if you're storing this +// persistently, you should probably store the Dot11InformationElementID value, +// not its string. +func (a Dot11InformationElementID) String() string { + switch a { + case Dot11InformationElementIDSSID: + return "SSID parameter set" + case Dot11InformationElementIDRates: + return "Supported Rates" + case Dot11InformationElementIDFHSet: + return "FH Parameter set" + case Dot11InformationElementIDDSSet: + return "DS Parameter set" + case Dot11InformationElementIDCFSet: + return "CF Parameter set" + case Dot11InformationElementIDTIM: + return "Traffic Indication Map (TIM)" + case Dot11InformationElementIDIBSSSet: + return "IBSS Parameter set" + case Dot11InformationElementIDCountryInfo: + return "Country Information" + case Dot11InformationElementIDHoppingPatternParam: + return "Hopping Pattern Parameters" + case Dot11InformationElementIDHoppingPatternTable: + return "Hopping Pattern Table" + case Dot11InformationElementIDRequest: + return "Request" + case Dot11InformationElementIDQBSSLoadElem: + return "QBSS Load Element" + case Dot11InformationElementIDEDCAParamSet: + return "EDCA Parameter Set" + case Dot11InformationElementIDTrafficSpec: + return "Traffic Specification" + case Dot11InformationElementIDTrafficClass: + return "Traffic Classification" + case Dot11InformationElementIDSchedule: + return "Schedule" + case Dot11InformationElementIDChallenge: + return "Challenge text" + case Dot11InformationElementIDPowerConst: + return "Power Constraint" + case Dot11InformationElementIDPowerCapability: + return "Power Capability" + case Dot11InformationElementIDTPCRequest: + return "TPC Request" + case Dot11InformationElementIDTPCReport: + return "TPC Report" + case Dot11InformationElementIDSupportedChannels: + return "Supported Channels" + case Dot11InformationElementIDSwitchChannelAnnounce: + return "Channel Switch Announcement" + case Dot11InformationElementIDMeasureRequest: + return "Measurement Request" + case Dot11InformationElementIDMeasureReport: + return "Measurement Report" + case Dot11InformationElementIDQuiet: + return "Quiet" + case Dot11InformationElementIDIBSSDFS: + return "IBSS DFS" + case Dot11InformationElementIDERPInfo: + return "ERP Information" + case Dot11InformationElementIDTSDelay: + return "TS Delay" + case Dot11InformationElementIDTCLASProcessing: + return "TCLAS Processing" + case Dot11InformationElementIDHTCapabilities: + return "HT Capabilities (802.11n D1.10)" + case Dot11InformationElementIDQOSCapability: + return "QOS Capability" + case Dot11InformationElementIDERPInfo2: + return "ERP Information-2" + case Dot11InformationElementIDRSNInfo: + return "RSN Information" + case Dot11InformationElementIDESRates: + return "Extended Supported Rates" + case Dot11InformationElementIDAPChannelReport: + return "AP Channel Report" + case Dot11InformationElementIDNeighborReport: + return "Neighbor Report" + case Dot11InformationElementIDRCPI: + return "RCPI" + case Dot11InformationElementIDMobilityDomain: + return "Mobility Domain" + case Dot11InformationElementIDFastBSSTrans: + return "Fast BSS Transition" + case Dot11InformationElementIDTimeoutInt: + return "Timeout Interval" + case Dot11InformationElementIDRICData: + return "RIC Data" + case Dot11InformationElementIDDSERegisteredLoc: + return "DSE Registered Location" + case Dot11InformationElementIDSuppOperatingClass: + return "Supported Operating Classes" + case Dot11InformationElementIDExtChanSwitchAnnounce: + return "Extended Channel Switch Announcement" + case Dot11InformationElementIDHTInfo: + return "HT Information (802.11n D1.10)" + case Dot11InformationElementIDSecChanOffset: + return "Secondary Channel Offset (802.11n D1.10)" + case Dot11InformationElementIDBSSAverageAccessDelay: + return "BSS Average Access Delay" + case Dot11InformationElementIDAntenna: + return "Antenna" + case Dot11InformationElementIDRSNI: + return "RSNI" + case Dot11InformationElementIDMeasurePilotTrans: + return "Measurement Pilot Transmission" + case Dot11InformationElementIDBSSAvailAdmCapacity: + return "BSS Available Admission Capacity" + case Dot11InformationElementIDBSSACAccDelayWAPIParam: + return "BSS AC Access Delay/WAPI Parameter Set" + case Dot11InformationElementIDTimeAdvertisement: + return "Time Advertisement" + case Dot11InformationElementIDRMEnabledCapabilities: + return "RM Enabled Capabilities" + case Dot11InformationElementIDMultipleBSSID: + return "Multiple BSSID" + case Dot11InformationElementID2040BSSCoExist: + return "20/40 BSS Coexistence" + case Dot11InformationElementID2040BSSIntChanReport: + return "20/40 BSS Intolerant Channel Report" + case Dot11InformationElementIDOverlapBSSScanParam: + return "Overlapping BSS Scan Parameters" + case Dot11InformationElementIDRICDescriptor: + return "RIC Descriptor" + case Dot11InformationElementIDManagementMIC: + return "Management MIC" + case Dot11InformationElementIDEventRequest: + return "Event Request" + case Dot11InformationElementIDEventReport: + return "Event Report" + case Dot11InformationElementIDDiagnosticRequest: + return "Diagnostic Request" + case Dot11InformationElementIDDiagnosticReport: + return "Diagnostic Report" + case Dot11InformationElementIDLocationParam: + return "Location Parameters" + case Dot11InformationElementIDNonTransBSSIDCapability: + return "Non Transmitted BSSID Capability" + case Dot11InformationElementIDSSIDList: + return "SSID List" + case Dot11InformationElementIDMultipleBSSIDIndex: + return "Multiple BSSID Index" + case Dot11InformationElementIDFMSDescriptor: + return "FMS Descriptor" + case Dot11InformationElementIDFMSRequest: + return "FMS Request" + case Dot11InformationElementIDFMSResponse: + return "FMS Response" + case Dot11InformationElementIDQOSTrafficCapability: + return "QoS Traffic Capability" + case Dot11InformationElementIDBSSMaxIdlePeriod: + return "BSS Max Idle Period" + case Dot11InformationElementIDTFSRequest: + return "TFS Request" + case Dot11InformationElementIDTFSResponse: + return "TFS Response" + case Dot11InformationElementIDWNMSleepMode: + return "WNM-Sleep Mode" + case Dot11InformationElementIDTIMBroadcastRequest: + return "TIM Broadcast Request" + case Dot11InformationElementIDTIMBroadcastResponse: + return "TIM Broadcast Response" + case Dot11InformationElementIDCollInterferenceReport: + return "Collocated Interference Report" + case Dot11InformationElementIDChannelUsage: + return "Channel Usage" + case Dot11InformationElementIDTimeZone: + return "Time Zone" + case Dot11InformationElementIDDMSRequest: + return "DMS Request" + case Dot11InformationElementIDDMSResponse: + return "DMS Response" + case Dot11InformationElementIDLinkIdentifier: + return "Link Identifier" + case Dot11InformationElementIDWakeupSchedule: + return "Wakeup Schedule" + case Dot11InformationElementIDChannelSwitchTiming: + return "Channel Switch Timing" + case Dot11InformationElementIDPTIControl: + return "PTI Control" + case Dot11InformationElementIDPUBufferStatus: + return "PU Buffer Status" + case Dot11InformationElementIDInterworking: + return "Interworking" + case Dot11InformationElementIDAdvertisementProtocol: + return "Advertisement Protocol" + case Dot11InformationElementIDExpBWRequest: + return "Expedited Bandwidth Request" + case Dot11InformationElementIDQOSMapSet: + return "QoS Map Set" + case Dot11InformationElementIDRoamingConsortium: + return "Roaming Consortium" + case Dot11InformationElementIDEmergencyAlertIdentifier: + return "Emergency Alert Identifier" + case Dot11InformationElementIDMeshConfiguration: + return "Mesh Configuration" + case Dot11InformationElementIDMeshID: + return "Mesh ID" + case Dot11InformationElementIDMeshLinkMetricReport: + return "Mesh Link Metric Report" + case Dot11InformationElementIDCongestionNotification: + return "Congestion Notification" + case Dot11InformationElementIDMeshPeeringManagement: + return "Mesh Peering Management" + case Dot11InformationElementIDMeshChannelSwitchParam: + return "Mesh Channel Switch Parameters" + case Dot11InformationElementIDMeshAwakeWindows: + return "Mesh Awake Windows" + case Dot11InformationElementIDBeaconTiming: + return "Beacon Timing" + case Dot11InformationElementIDMCCAOPSetupRequest: + return "MCCAOP Setup Request" + case Dot11InformationElementIDMCCAOPSetupReply: + return "MCCAOP SETUP Reply" + case Dot11InformationElementIDMCCAOPAdvertisement: + return "MCCAOP Advertisement" + case Dot11InformationElementIDMCCAOPTeardown: + return "MCCAOP Teardown" + case Dot11InformationElementIDGateAnnouncement: + return "Gate Announcement" + case Dot11InformationElementIDRootAnnouncement: + return "Root Announcement" + case Dot11InformationElementIDExtCapability: + return "Extended Capabilities" + case Dot11InformationElementIDAgereProprietary: + return "Agere Proprietary" + case Dot11InformationElementIDPathRequest: + return "Path Request" + case Dot11InformationElementIDPathReply: + return "Path Reply" + case Dot11InformationElementIDPathError: + return "Path Error" + case Dot11InformationElementIDCiscoCCX1CKIPDeviceName: + return "Cisco CCX1 CKIP + Device Name" + case Dot11InformationElementIDCiscoCCX2: + return "Cisco CCX2" + case Dot11InformationElementIDProxyUpdate: + return "Proxy Update" + case Dot11InformationElementIDProxyUpdateConfirmation: + return "Proxy Update Confirmation" + case Dot11InformationElementIDAuthMeshPerringExch: + return "Auhenticated Mesh Perring Exchange" + case Dot11InformationElementIDMIC: + return "MIC (Message Integrity Code)" + case Dot11InformationElementIDDestinationURI: + return "Destination URI" + case Dot11InformationElementIDUAPSDCoexistence: + return "U-APSD Coexistence" + case Dot11InformationElementIDWakeupSchedule80211ad: + return "Wakeup Schedule 802.11ad" + case Dot11InformationElementIDExtendedSchedule: + return "Extended Schedule" + case Dot11InformationElementIDSTAAvailability: + return "STA Availability" + case Dot11InformationElementIDDMGTSPEC: + return "DMG TSPEC" + case Dot11InformationElementIDNextDMGATI: + return "Next DMG ATI" + case Dot11InformationElementIDDMSCapabilities: + return "DMG Capabilities" + case Dot11InformationElementIDCiscoUnknown95: + return "Cisco Unknown 95" + case Dot11InformationElementIDVendor2: + return "Vendor Specific" + case Dot11InformationElementIDDMGOperating: + return "DMG Operating" + case Dot11InformationElementIDDMGBSSParamChange: + return "DMG BSS Parameter Change" + case Dot11InformationElementIDDMGBeamRefinement: + return "DMG Beam Refinement" + case Dot11InformationElementIDChannelMeasFeedback: + return "Channel Measurement Feedback" + case Dot11InformationElementIDAwakeWindow: + return "Awake Window" + case Dot11InformationElementIDMultiBand: + return "Multi Band" + case Dot11InformationElementIDADDBAExtension: + return "ADDBA Extension" + case Dot11InformationElementIDNEXTPCPList: + return "NEXTPCP List" + case Dot11InformationElementIDPCPHandover: + return "PCP Handover" + case Dot11InformationElementIDDMGLinkMargin: + return "DMG Link Margin" + case Dot11InformationElementIDSwitchingStream: + return "Switching Stream" + case Dot11InformationElementIDSessionTransmission: + return "Session Transmission" + case Dot11InformationElementIDDynamicTonePairReport: + return "Dynamic Tone Pairing Report" + case Dot11InformationElementIDClusterReport: + return "Cluster Report" + case Dot11InformationElementIDRelayCapabilities: + return "Relay Capabilities" + case Dot11InformationElementIDRelayTransferParameter: + return "Relay Transfer Parameter" + case Dot11InformationElementIDBeamlinkMaintenance: + return "Beamlink Maintenance" + case Dot11InformationElementIDMultipleMacSublayers: + return "Multiple MAC Sublayers" + case Dot11InformationElementIDUPID: + return "U-PID" + case Dot11InformationElementIDDMGLinkAdaptionAck: + return "DMG Link Adaption Acknowledgment" + case Dot11InformationElementIDSymbolProprietary: + return "Symbol Proprietary" + case Dot11InformationElementIDMCCAOPAdvertOverview: + return "MCCAOP Advertisement Overview" + case Dot11InformationElementIDQuietPeriodRequest: + return "Quiet Period Request" + case Dot11InformationElementIDQuietPeriodResponse: + return "Quiet Period Response" + case Dot11InformationElementIDECPACPolicy: + return "ECPAC Policy" + case Dot11InformationElementIDClusterTimeOffset: + return "Cluster Time Offset" + case Dot11InformationElementIDAntennaSectorID: + return "Antenna Sector ID" + case Dot11InformationElementIDVHTCapabilities: + return "VHT Capabilities (IEEE Std 802.11ac/D3.1)" + case Dot11InformationElementIDVHTOperation: + return "VHT Operation (IEEE Std 802.11ac/D3.1)" + case Dot11InformationElementIDExtendedBSSLoad: + return "Extended BSS Load" + case Dot11InformationElementIDWideBWChannelSwitch: + return "Wide Bandwidth Channel Switch" + case Dot11InformationElementIDVHTTxPowerEnvelope: + return "VHT Tx Power Envelope (IEEE Std 802.11ac/D5.0)" + case Dot11InformationElementIDChannelSwitchWrapper: + return "Channel Switch Wrapper" + case Dot11InformationElementIDOperatingModeNotification: + return "Operating Mode Notification" + case Dot11InformationElementIDUPSIM: + return "UP SIM" + case Dot11InformationElementIDReducedNeighborReport: + return "Reduced Neighbor Report" + case Dot11InformationElementIDTVHTOperation: + return "TVHT Op" + case Dot11InformationElementIDDeviceLocation: + return "Device Location" + case Dot11InformationElementIDWhiteSpaceMap: + return "White Space Map" + case Dot11InformationElementIDFineTuningMeasureParams: + return "Fine Tuning Measure Parameters" + case Dot11InformationElementIDVendor: + return "Vendor" + default: + return "Unknown information element id" + } +} + +// Dot11 provides an IEEE 802.11 base packet header. +// See http://standards.ieee.org/findstds/standard/802.11-2012.html +// for excruciating detail. +type Dot11 struct { + BaseLayer + Type Dot11Type + Proto uint8 + Flags Dot11Flags + DurationID uint16 + Address1 net.HardwareAddr + Address2 net.HardwareAddr + Address3 net.HardwareAddr + Address4 net.HardwareAddr + SequenceNumber uint16 + FragmentNumber uint16 + Checksum uint32 + QOS *Dot11QOS + HTControl *Dot11HTControl + DataLayer gopacket.Layer +} + +type Dot11QOS struct { + TID uint8 /* Traffic IDentifier */ + EOSP bool /* End of service period */ + AckPolicy Dot11AckPolicy + TXOP uint8 +} + +type Dot11HTControl struct { + ACConstraint bool + RDGMorePPDU bool + + VHT *Dot11HTControlVHT + HT *Dot11HTControlHT +} + +type Dot11HTControlHT struct { + LinkAdapationControl *Dot11LinkAdapationControl + CalibrationPosition uint8 + CalibrationSequence uint8 + CSISteering uint8 + NDPAnnouncement bool + DEI bool +} + +type Dot11HTControlVHT struct { + MRQ bool + UnsolicitedMFB bool + MSI *uint8 + MFB Dot11HTControlMFB + CompressedMSI *uint8 + STBCIndication bool + MFSI *uint8 + GID *uint8 + CodingType *Dot11CodingType + FbTXBeamformed bool +} + +type Dot11HTControlMFB struct { + NumSTS uint8 + VHTMCS uint8 + BW uint8 + SNR int8 +} + +type Dot11LinkAdapationControl struct { + TRQ bool + MRQ bool + MSI uint8 + MFSI uint8 + ASEL *Dot11ASEL + MFB *uint8 +} + +type Dot11ASEL struct { + Command uint8 + Data uint8 +} + +type Dot11CodingType uint8 + +const ( + Dot11CodingTypeBCC = 0 + Dot11CodingTypeLDPC = 1 +) + +func (a Dot11CodingType) String() string { + switch a { + case Dot11CodingTypeBCC: + return "BCC" + case Dot11CodingTypeLDPC: + return "LDPC" + default: + return "Unknown coding type" + } +} + +func (m *Dot11HTControlMFB) NoFeedBackPresent() bool { + return m.VHTMCS == 15 && m.NumSTS == 7 +} + +func decodeDot11(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11{} + err := d.DecodeFromBytes(data, p) + if err != nil { + return err + } + p.AddLayer(d) + if d.DataLayer != nil { + p.AddLayer(d.DataLayer) + } + return p.NextDecoder(d.NextLayerType()) +} + +func (m *Dot11) LayerType() gopacket.LayerType { return LayerTypeDot11 } +func (m *Dot11) CanDecode() gopacket.LayerClass { return LayerTypeDot11 } +func (m *Dot11) NextLayerType() gopacket.LayerType { + if m.DataLayer != nil { + if m.Flags.WEP() { + return LayerTypeDot11WEP + } + return m.DataLayer.(gopacket.DecodingLayer).NextLayerType() + } + return m.Type.LayerType() +} + +func createU8(x uint8) *uint8 { + return &x +} + +var dataDecodeMap = map[Dot11Type]func() gopacket.DecodingLayer{ + Dot11TypeData: func() gopacket.DecodingLayer { return &Dot11Data{} }, + Dot11TypeDataCFAck: func() gopacket.DecodingLayer { return &Dot11DataCFAck{} }, + Dot11TypeDataCFPoll: func() gopacket.DecodingLayer { return &Dot11DataCFPoll{} }, + Dot11TypeDataCFAckPoll: func() gopacket.DecodingLayer { return &Dot11DataCFAckPoll{} }, + Dot11TypeDataNull: func() gopacket.DecodingLayer { return &Dot11DataNull{} }, + Dot11TypeDataCFAckNoData: func() gopacket.DecodingLayer { return &Dot11DataCFAckNoData{} }, + Dot11TypeDataCFPollNoData: func() gopacket.DecodingLayer { return &Dot11DataCFPollNoData{} }, + Dot11TypeDataCFAckPollNoData: func() gopacket.DecodingLayer { return &Dot11DataCFAckPollNoData{} }, + Dot11TypeDataQOSData: func() gopacket.DecodingLayer { return &Dot11DataQOSData{} }, + Dot11TypeDataQOSDataCFAck: func() gopacket.DecodingLayer { return &Dot11DataQOSDataCFAck{} }, + Dot11TypeDataQOSDataCFPoll: func() gopacket.DecodingLayer { return &Dot11DataQOSDataCFPoll{} }, + Dot11TypeDataQOSDataCFAckPoll: func() gopacket.DecodingLayer { return &Dot11DataQOSDataCFAckPoll{} }, + Dot11TypeDataQOSNull: func() gopacket.DecodingLayer { return &Dot11DataQOSNull{} }, + Dot11TypeDataQOSCFPollNoData: func() gopacket.DecodingLayer { return &Dot11DataQOSCFPollNoData{} }, + Dot11TypeDataQOSCFAckPollNoData: func() gopacket.DecodingLayer { return &Dot11DataQOSCFAckPollNoData{} }, +} + +func (m *Dot11) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 10 { + df.SetTruncated() + return fmt.Errorf("Dot11 length %v too short, %v required", len(data), 10) + } + m.Type = Dot11Type((data[0])&0xFC) >> 2 + + m.DataLayer = nil + m.Proto = uint8(data[0]) & 0x0003 + m.Flags = Dot11Flags(data[1]) + m.DurationID = binary.LittleEndian.Uint16(data[2:4]) + m.Address1 = net.HardwareAddr(data[4:10]) + + offset := 10 + + mainType := m.Type.MainType() + + switch mainType { + case Dot11TypeCtrl: + switch m.Type { + case Dot11TypeCtrlRTS, Dot11TypeCtrlPowersavePoll, Dot11TypeCtrlCFEnd, Dot11TypeCtrlCFEndAck: + if len(data) < offset+6 { + df.SetTruncated() + return fmt.Errorf("Dot11 length %v too short, %v required", len(data), offset+6) + } + m.Address2 = net.HardwareAddr(data[offset : offset+6]) + offset += 6 + } + case Dot11TypeMgmt, Dot11TypeData: + if len(data) < offset+14 { + df.SetTruncated() + return fmt.Errorf("Dot11 length %v too short, %v required", len(data), offset+14) + } + m.Address2 = net.HardwareAddr(data[offset : offset+6]) + offset += 6 + m.Address3 = net.HardwareAddr(data[offset : offset+6]) + offset += 6 + + m.SequenceNumber = (binary.LittleEndian.Uint16(data[offset:offset+2]) & 0xFFF0) >> 4 + m.FragmentNumber = (binary.LittleEndian.Uint16(data[offset:offset+2]) & 0x000F) + offset += 2 + } + + if mainType == Dot11TypeData && m.Flags.FromDS() && m.Flags.ToDS() { + if len(data) < offset+6 { + df.SetTruncated() + return fmt.Errorf("Dot11 length %v too short, %v required", len(data), offset+6) + } + m.Address4 = net.HardwareAddr(data[offset : offset+6]) + offset += 6 + } + + if m.Type.QOS() { + if len(data) < offset+2 { + df.SetTruncated() + return fmt.Errorf("Dot11 length %v too short, %v required", len(data), offset+6) + } + m.QOS = &Dot11QOS{ + TID: (uint8(data[offset]) & 0x0F), + EOSP: (uint8(data[offset]) & 0x10) == 0x10, + AckPolicy: Dot11AckPolicy((uint8(data[offset]) & 0x60) >> 5), + TXOP: uint8(data[offset+1]), + } + offset += 2 + } + if m.Flags.Order() && (m.Type.QOS() || mainType == Dot11TypeMgmt) { + if len(data) < offset+4 { + df.SetTruncated() + return fmt.Errorf("Dot11 length %v too short, %v required", len(data), offset+6) + } + + htc := &Dot11HTControl{ + ACConstraint: data[offset+3]&0x40 != 0, + RDGMorePPDU: data[offset+3]&0x80 != 0, + } + m.HTControl = htc + + if data[offset]&0x1 != 0 { // VHT Variant + vht := &Dot11HTControlVHT{} + htc.VHT = vht + vht.MRQ = data[offset]&0x4 != 0 + vht.UnsolicitedMFB = data[offset+3]&0x20 != 0 + vht.MFB = Dot11HTControlMFB{ + NumSTS: uint8(data[offset+1] >> 1 & 0x7), + VHTMCS: uint8(data[offset+1] >> 4 & 0xF), + BW: uint8(data[offset+2] & 0x3), + SNR: int8((-(data[offset+2] >> 2 & 0x20))+data[offset+2]>>2&0x1F) + 22, + } + + if vht.UnsolicitedMFB { + if !vht.MFB.NoFeedBackPresent() { + vht.CompressedMSI = createU8(data[offset] >> 3 & 0x3) + vht.STBCIndication = data[offset]&0x20 != 0 + vht.CodingType = (*Dot11CodingType)(createU8(data[offset+3] >> 3 & 0x1)) + vht.FbTXBeamformed = data[offset+3]&0x10 != 0 + vht.GID = createU8( + data[offset]>>6 + + (data[offset+1] & 0x1 << 2) + + data[offset+3]&0x7<<3) + } + } else { + if vht.MRQ { + vht.MSI = createU8((data[offset] >> 3) & 0x07) + } + vht.MFSI = createU8(data[offset]>>6 + (data[offset+1] & 0x1 << 2)) + } + + } else { // HT Variant + ht := &Dot11HTControlHT{} + htc.HT = ht + + lac := &Dot11LinkAdapationControl{} + ht.LinkAdapationControl = lac + lac.TRQ = data[offset]&0x2 != 0 + lac.MFSI = data[offset]>>6&0x3 + data[offset+1]&0x1<<3 + if data[offset]&0x3C == 0x38 { // ASEL + lac.ASEL = &Dot11ASEL{ + Command: data[offset+1] >> 1 & 0x7, + Data: data[offset+1] >> 4 & 0xF, + } + } else { + lac.MRQ = data[offset]&0x4 != 0 + if lac.MRQ { + lac.MSI = data[offset] >> 3 & 0x7 + } + lac.MFB = createU8(data[offset+1] >> 1) + } + ht.CalibrationPosition = data[offset+2] & 0x3 + ht.CalibrationSequence = data[offset+2] >> 2 & 0x3 + ht.CSISteering = data[offset+2] >> 6 & 0x3 + ht.NDPAnnouncement = data[offset+3]&0x1 != 0 + if mainType != Dot11TypeMgmt { + ht.DEI = data[offset+3]&0x20 != 0 + } + } + + offset += 4 + } + + if len(data) < offset+4 { + df.SetTruncated() + return fmt.Errorf("Dot11 length %v too short, %v required", len(data), offset+4) + } + + m.BaseLayer = BaseLayer{ + Contents: data[0:offset], + Payload: data[offset : len(data)-4], + } + + if mainType == Dot11TypeData { + d := dataDecodeMap[m.Type] + if d == nil { + return fmt.Errorf("unsupported type: %v", m.Type) + } + l := d() + err := l.DecodeFromBytes(m.BaseLayer.Payload, df) + if err != nil { + return err + } + m.DataLayer = l.(gopacket.Layer) + } + + m.Checksum = binary.LittleEndian.Uint32(data[len(data)-4 : len(data)]) + return nil +} + +func (m *Dot11) ChecksumValid() bool { + // only for CTRL and MGMT frames + h := crc32.NewIEEE() + h.Write(m.Contents) + h.Write(m.Payload) + return m.Checksum == h.Sum32() +} + +func (m Dot11) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + buf, err := b.PrependBytes(24) + + if err != nil { + return err + } + + buf[0] = (uint8(m.Type) << 2) | m.Proto + buf[1] = uint8(m.Flags) + + binary.LittleEndian.PutUint16(buf[2:4], m.DurationID) + + copy(buf[4:10], m.Address1) + + offset := 10 + + switch m.Type.MainType() { + case Dot11TypeCtrl: + switch m.Type { + case Dot11TypeCtrlRTS, Dot11TypeCtrlPowersavePoll, Dot11TypeCtrlCFEnd, Dot11TypeCtrlCFEndAck: + copy(buf[offset:offset+6], m.Address2) + offset += 6 + } + case Dot11TypeMgmt, Dot11TypeData: + copy(buf[offset:offset+6], m.Address2) + offset += 6 + copy(buf[offset:offset+6], m.Address3) + offset += 6 + + binary.LittleEndian.PutUint16(buf[offset:offset+2], (m.SequenceNumber<<4)|m.FragmentNumber) + offset += 2 + } + + if m.Type.MainType() == Dot11TypeData && m.Flags.FromDS() && m.Flags.ToDS() { + copy(buf[offset:offset+6], m.Address4) + offset += 6 + } + + return nil +} + +// Dot11Mgmt is a base for all IEEE 802.11 management layers. +type Dot11Mgmt struct { + BaseLayer +} + +func (m *Dot11Mgmt) NextLayerType() gopacket.LayerType { return gopacket.LayerTypePayload } +func (m *Dot11Mgmt) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + m.Contents = data + return nil +} + +// Dot11Ctrl is a base for all IEEE 802.11 control layers. +type Dot11Ctrl struct { + BaseLayer +} + +func (m *Dot11Ctrl) NextLayerType() gopacket.LayerType { return gopacket.LayerTypePayload } + +func (m *Dot11Ctrl) LayerType() gopacket.LayerType { return LayerTypeDot11Ctrl } +func (m *Dot11Ctrl) CanDecode() gopacket.LayerClass { return LayerTypeDot11Ctrl } +func (m *Dot11Ctrl) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + m.Contents = data + return nil +} + +func decodeDot11Ctrl(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11Ctrl{} + return decodingLayerDecoder(d, data, p) +} + +// Dot11WEP contains WEP encrpted IEEE 802.11 data. +type Dot11WEP struct { + BaseLayer +} + +func (m *Dot11WEP) NextLayerType() gopacket.LayerType { return gopacket.LayerTypePayload } + +func (m *Dot11WEP) LayerType() gopacket.LayerType { return LayerTypeDot11WEP } +func (m *Dot11WEP) CanDecode() gopacket.LayerClass { return LayerTypeDot11WEP } +func (m *Dot11WEP) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + m.Contents = data + return nil +} + +func decodeDot11WEP(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11WEP{} + return decodingLayerDecoder(d, data, p) +} + +// Dot11Data is a base for all IEEE 802.11 data layers. +type Dot11Data struct { + BaseLayer +} + +func (m *Dot11Data) NextLayerType() gopacket.LayerType { + return LayerTypeLLC +} + +func (m *Dot11Data) LayerType() gopacket.LayerType { return LayerTypeDot11Data } +func (m *Dot11Data) CanDecode() gopacket.LayerClass { return LayerTypeDot11Data } +func (m *Dot11Data) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + m.Payload = data + return nil +} + +func decodeDot11Data(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11Data{} + return decodingLayerDecoder(d, data, p) +} + +type Dot11DataCFAck struct { + Dot11Data +} + +func decodeDot11DataCFAck(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11DataCFAck{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11DataCFAck) LayerType() gopacket.LayerType { return LayerTypeDot11DataCFAck } +func (m *Dot11DataCFAck) CanDecode() gopacket.LayerClass { return LayerTypeDot11DataCFAck } +func (m *Dot11DataCFAck) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + return m.Dot11Data.DecodeFromBytes(data, df) +} + +type Dot11DataCFPoll struct { + Dot11Data +} + +func decodeDot11DataCFPoll(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11DataCFPoll{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11DataCFPoll) LayerType() gopacket.LayerType { return LayerTypeDot11DataCFPoll } +func (m *Dot11DataCFPoll) CanDecode() gopacket.LayerClass { return LayerTypeDot11DataCFPoll } +func (m *Dot11DataCFPoll) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + return m.Dot11Data.DecodeFromBytes(data, df) +} + +type Dot11DataCFAckPoll struct { + Dot11Data +} + +func decodeDot11DataCFAckPoll(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11DataCFAckPoll{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11DataCFAckPoll) LayerType() gopacket.LayerType { return LayerTypeDot11DataCFAckPoll } +func (m *Dot11DataCFAckPoll) CanDecode() gopacket.LayerClass { return LayerTypeDot11DataCFAckPoll } +func (m *Dot11DataCFAckPoll) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + return m.Dot11Data.DecodeFromBytes(data, df) +} + +type Dot11DataNull struct { + Dot11Data +} + +func decodeDot11DataNull(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11DataNull{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11DataNull) LayerType() gopacket.LayerType { return LayerTypeDot11DataNull } +func (m *Dot11DataNull) CanDecode() gopacket.LayerClass { return LayerTypeDot11DataNull } +func (m *Dot11DataNull) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + return m.Dot11Data.DecodeFromBytes(data, df) +} + +type Dot11DataCFAckNoData struct { + Dot11Data +} + +func decodeDot11DataCFAckNoData(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11DataCFAckNoData{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11DataCFAckNoData) LayerType() gopacket.LayerType { return LayerTypeDot11DataCFAckNoData } +func (m *Dot11DataCFAckNoData) CanDecode() gopacket.LayerClass { return LayerTypeDot11DataCFAckNoData } +func (m *Dot11DataCFAckNoData) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + return m.Dot11Data.DecodeFromBytes(data, df) +} + +type Dot11DataCFPollNoData struct { + Dot11Data +} + +func decodeDot11DataCFPollNoData(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11DataCFPollNoData{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11DataCFPollNoData) LayerType() gopacket.LayerType { return LayerTypeDot11DataCFPollNoData } +func (m *Dot11DataCFPollNoData) CanDecode() gopacket.LayerClass { + return LayerTypeDot11DataCFPollNoData +} +func (m *Dot11DataCFPollNoData) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + return m.Dot11Data.DecodeFromBytes(data, df) +} + +type Dot11DataCFAckPollNoData struct { + Dot11Data +} + +func decodeDot11DataCFAckPollNoData(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11DataCFAckPollNoData{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11DataCFAckPollNoData) LayerType() gopacket.LayerType { + return LayerTypeDot11DataCFAckPollNoData +} +func (m *Dot11DataCFAckPollNoData) CanDecode() gopacket.LayerClass { + return LayerTypeDot11DataCFAckPollNoData +} +func (m *Dot11DataCFAckPollNoData) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + return m.Dot11Data.DecodeFromBytes(data, df) +} + +type Dot11DataQOS struct { + Dot11Ctrl +} + +func (m *Dot11DataQOS) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + m.BaseLayer = BaseLayer{Payload: data} + return nil +} + +type Dot11DataQOSData struct { + Dot11DataQOS +} + +func decodeDot11DataQOSData(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11DataQOSData{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11DataQOSData) LayerType() gopacket.LayerType { return LayerTypeDot11DataQOSData } +func (m *Dot11DataQOSData) CanDecode() gopacket.LayerClass { return LayerTypeDot11DataQOSData } + +func (m *Dot11DataQOSData) NextLayerType() gopacket.LayerType { + return LayerTypeDot11Data +} + +type Dot11DataQOSDataCFAck struct { + Dot11DataQOS +} + +func decodeDot11DataQOSDataCFAck(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11DataQOSDataCFAck{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11DataQOSDataCFAck) LayerType() gopacket.LayerType { return LayerTypeDot11DataQOSDataCFAck } +func (m *Dot11DataQOSDataCFAck) CanDecode() gopacket.LayerClass { + return LayerTypeDot11DataQOSDataCFAck +} +func (m *Dot11DataQOSDataCFAck) NextLayerType() gopacket.LayerType { return LayerTypeDot11DataCFAck } + +type Dot11DataQOSDataCFPoll struct { + Dot11DataQOS +} + +func decodeDot11DataQOSDataCFPoll(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11DataQOSDataCFPoll{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11DataQOSDataCFPoll) LayerType() gopacket.LayerType { + return LayerTypeDot11DataQOSDataCFPoll +} +func (m *Dot11DataQOSDataCFPoll) CanDecode() gopacket.LayerClass { + return LayerTypeDot11DataQOSDataCFPoll +} +func (m *Dot11DataQOSDataCFPoll) NextLayerType() gopacket.LayerType { return LayerTypeDot11DataCFPoll } + +type Dot11DataQOSDataCFAckPoll struct { + Dot11DataQOS +} + +func decodeDot11DataQOSDataCFAckPoll(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11DataQOSDataCFAckPoll{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11DataQOSDataCFAckPoll) LayerType() gopacket.LayerType { + return LayerTypeDot11DataQOSDataCFAckPoll +} +func (m *Dot11DataQOSDataCFAckPoll) CanDecode() gopacket.LayerClass { + return LayerTypeDot11DataQOSDataCFAckPoll +} +func (m *Dot11DataQOSDataCFAckPoll) NextLayerType() gopacket.LayerType { + return LayerTypeDot11DataCFAckPoll +} + +type Dot11DataQOSNull struct { + Dot11DataQOS +} + +func decodeDot11DataQOSNull(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11DataQOSNull{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11DataQOSNull) LayerType() gopacket.LayerType { return LayerTypeDot11DataQOSNull } +func (m *Dot11DataQOSNull) CanDecode() gopacket.LayerClass { return LayerTypeDot11DataQOSNull } +func (m *Dot11DataQOSNull) NextLayerType() gopacket.LayerType { return LayerTypeDot11DataNull } + +type Dot11DataQOSCFPollNoData struct { + Dot11DataQOS +} + +func decodeDot11DataQOSCFPollNoData(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11DataQOSCFPollNoData{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11DataQOSCFPollNoData) LayerType() gopacket.LayerType { + return LayerTypeDot11DataQOSCFPollNoData +} +func (m *Dot11DataQOSCFPollNoData) CanDecode() gopacket.LayerClass { + return LayerTypeDot11DataQOSCFPollNoData +} +func (m *Dot11DataQOSCFPollNoData) NextLayerType() gopacket.LayerType { + return LayerTypeDot11DataCFPollNoData +} + +type Dot11DataQOSCFAckPollNoData struct { + Dot11DataQOS +} + +func decodeDot11DataQOSCFAckPollNoData(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11DataQOSCFAckPollNoData{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11DataQOSCFAckPollNoData) LayerType() gopacket.LayerType { + return LayerTypeDot11DataQOSCFAckPollNoData +} +func (m *Dot11DataQOSCFAckPollNoData) CanDecode() gopacket.LayerClass { + return LayerTypeDot11DataQOSCFAckPollNoData +} +func (m *Dot11DataQOSCFAckPollNoData) NextLayerType() gopacket.LayerType { + return LayerTypeDot11DataCFAckPollNoData +} + +type Dot11InformationElement struct { + BaseLayer + ID Dot11InformationElementID + Length uint8 + OUI []byte + Info []byte +} + +func (m *Dot11InformationElement) LayerType() gopacket.LayerType { + return LayerTypeDot11InformationElement +} +func (m *Dot11InformationElement) CanDecode() gopacket.LayerClass { + return LayerTypeDot11InformationElement +} + +func (m *Dot11InformationElement) NextLayerType() gopacket.LayerType { + return LayerTypeDot11InformationElement +} + +func (m *Dot11InformationElement) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 2 { + df.SetTruncated() + return fmt.Errorf("Dot11InformationElement length %v too short, %v required", len(data), 2) + } + m.ID = Dot11InformationElementID(data[0]) + m.Length = data[1] + offset := int(2) + + if len(data) < offset+int(m.Length) { + df.SetTruncated() + return fmt.Errorf("Dot11InformationElement length %v too short, %v required", len(data), offset+int(m.Length)) + } + if len(data) < offset+4 { + df.SetTruncated() + return fmt.Errorf("vendor extension size < %d", offset+int(m.Length)) + } + if m.ID == 221 { + // Vendor extension + m.OUI = data[offset : offset+4] + m.Info = data[offset+4 : offset+int(m.Length)] + } else { + m.Info = data[offset : offset+int(m.Length)] + } + + offset += int(m.Length) + + m.BaseLayer = BaseLayer{Contents: data[:offset], Payload: data[offset:]} + return nil +} + +func (d *Dot11InformationElement) String() string { + if d.ID == 0 { + return fmt.Sprintf("802.11 Information Element (ID: %v, Length: %v, SSID: %v)", d.ID, d.Length, string(d.Info)) + } else if d.ID == 1 { + rates := "" + for i := 0; i < len(d.Info); i++ { + if d.Info[i]&0x80 == 0 { + rates += fmt.Sprintf("%.1f ", float32(d.Info[i])*0.5) + } else { + rates += fmt.Sprintf("%.1f* ", float32(d.Info[i]&0x7F)*0.5) + } + } + return fmt.Sprintf("802.11 Information Element (ID: %v, Length: %v, Rates: %s Mbit)", d.ID, d.Length, rates) + } else if d.ID == 221 { + return fmt.Sprintf("802.11 Information Element (ID: %v, Length: %v, OUI: %X, Info: %X)", d.ID, d.Length, d.OUI, d.Info) + } else { + return fmt.Sprintf("802.11 Information Element (ID: %v, Length: %v, Info: %X)", d.ID, d.Length, d.Info) + } +} + +func (m Dot11InformationElement) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + length := len(m.Info) + len(m.OUI) + if buf, err := b.PrependBytes(2 + length); err != nil { + return err + } else { + buf[0] = uint8(m.ID) + buf[1] = uint8(length) + copy(buf[2:], m.OUI) + copy(buf[2+len(m.OUI):], m.Info) + } + return nil +} + +func decodeDot11InformationElement(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11InformationElement{} + return decodingLayerDecoder(d, data, p) +} + +type Dot11CtrlCTS struct { + Dot11Ctrl +} + +func decodeDot11CtrlCTS(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11CtrlCTS{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11CtrlCTS) LayerType() gopacket.LayerType { + return LayerTypeDot11CtrlCTS +} +func (m *Dot11CtrlCTS) CanDecode() gopacket.LayerClass { + return LayerTypeDot11CtrlCTS +} +func (m *Dot11CtrlCTS) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + return m.Dot11Ctrl.DecodeFromBytes(data, df) +} + +type Dot11CtrlRTS struct { + Dot11Ctrl +} + +func decodeDot11CtrlRTS(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11CtrlRTS{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11CtrlRTS) LayerType() gopacket.LayerType { + return LayerTypeDot11CtrlRTS +} +func (m *Dot11CtrlRTS) CanDecode() gopacket.LayerClass { + return LayerTypeDot11CtrlRTS +} +func (m *Dot11CtrlRTS) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + return m.Dot11Ctrl.DecodeFromBytes(data, df) +} + +type Dot11CtrlBlockAckReq struct { + Dot11Ctrl +} + +func decodeDot11CtrlBlockAckReq(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11CtrlBlockAckReq{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11CtrlBlockAckReq) LayerType() gopacket.LayerType { + return LayerTypeDot11CtrlBlockAckReq +} +func (m *Dot11CtrlBlockAckReq) CanDecode() gopacket.LayerClass { + return LayerTypeDot11CtrlBlockAckReq +} +func (m *Dot11CtrlBlockAckReq) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + return m.Dot11Ctrl.DecodeFromBytes(data, df) +} + +type Dot11CtrlBlockAck struct { + Dot11Ctrl +} + +func decodeDot11CtrlBlockAck(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11CtrlBlockAck{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11CtrlBlockAck) LayerType() gopacket.LayerType { return LayerTypeDot11CtrlBlockAck } +func (m *Dot11CtrlBlockAck) CanDecode() gopacket.LayerClass { return LayerTypeDot11CtrlBlockAck } +func (m *Dot11CtrlBlockAck) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + return m.Dot11Ctrl.DecodeFromBytes(data, df) +} + +type Dot11CtrlPowersavePoll struct { + Dot11Ctrl +} + +func decodeDot11CtrlPowersavePoll(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11CtrlPowersavePoll{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11CtrlPowersavePoll) LayerType() gopacket.LayerType { + return LayerTypeDot11CtrlPowersavePoll +} +func (m *Dot11CtrlPowersavePoll) CanDecode() gopacket.LayerClass { + return LayerTypeDot11CtrlPowersavePoll +} +func (m *Dot11CtrlPowersavePoll) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + return m.Dot11Ctrl.DecodeFromBytes(data, df) +} + +type Dot11CtrlAck struct { + Dot11Ctrl +} + +func decodeDot11CtrlAck(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11CtrlAck{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11CtrlAck) LayerType() gopacket.LayerType { return LayerTypeDot11CtrlAck } +func (m *Dot11CtrlAck) CanDecode() gopacket.LayerClass { return LayerTypeDot11CtrlAck } +func (m *Dot11CtrlAck) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + return m.Dot11Ctrl.DecodeFromBytes(data, df) +} + +type Dot11CtrlCFEnd struct { + Dot11Ctrl +} + +func decodeDot11CtrlCFEnd(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11CtrlCFEnd{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11CtrlCFEnd) LayerType() gopacket.LayerType { + return LayerTypeDot11CtrlCFEnd +} +func (m *Dot11CtrlCFEnd) CanDecode() gopacket.LayerClass { + return LayerTypeDot11CtrlCFEnd +} +func (m *Dot11CtrlCFEnd) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + return m.Dot11Ctrl.DecodeFromBytes(data, df) +} + +type Dot11CtrlCFEndAck struct { + Dot11Ctrl +} + +func decodeDot11CtrlCFEndAck(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11CtrlCFEndAck{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11CtrlCFEndAck) LayerType() gopacket.LayerType { + return LayerTypeDot11CtrlCFEndAck +} +func (m *Dot11CtrlCFEndAck) CanDecode() gopacket.LayerClass { + return LayerTypeDot11CtrlCFEndAck +} +func (m *Dot11CtrlCFEndAck) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + return m.Dot11Ctrl.DecodeFromBytes(data, df) +} + +type Dot11MgmtAssociationReq struct { + Dot11Mgmt + CapabilityInfo uint16 + ListenInterval uint16 +} + +func decodeDot11MgmtAssociationReq(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11MgmtAssociationReq{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11MgmtAssociationReq) LayerType() gopacket.LayerType { + return LayerTypeDot11MgmtAssociationReq +} +func (m *Dot11MgmtAssociationReq) CanDecode() gopacket.LayerClass { + return LayerTypeDot11MgmtAssociationReq +} +func (m *Dot11MgmtAssociationReq) NextLayerType() gopacket.LayerType { + return LayerTypeDot11InformationElement +} +func (m *Dot11MgmtAssociationReq) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 4 { + df.SetTruncated() + return fmt.Errorf("Dot11MgmtAssociationReq length %v too short, %v required", len(data), 4) + } + m.CapabilityInfo = binary.LittleEndian.Uint16(data[0:2]) + m.ListenInterval = binary.LittleEndian.Uint16(data[2:4]) + m.Payload = data[4:] + return m.Dot11Mgmt.DecodeFromBytes(data, df) +} + +func (m Dot11MgmtAssociationReq) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + buf, err := b.PrependBytes(4) + + if err != nil { + return err + } + + binary.LittleEndian.PutUint16(buf[0:2], m.CapabilityInfo) + binary.LittleEndian.PutUint16(buf[2:4], m.ListenInterval) + + return nil +} + +type Dot11MgmtAssociationResp struct { + Dot11Mgmt + CapabilityInfo uint16 + Status Dot11Status + AID uint16 +} + +func decodeDot11MgmtAssociationResp(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11MgmtAssociationResp{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11MgmtAssociationResp) CanDecode() gopacket.LayerClass { + return LayerTypeDot11MgmtAssociationResp +} +func (m *Dot11MgmtAssociationResp) LayerType() gopacket.LayerType { + return LayerTypeDot11MgmtAssociationResp +} +func (m *Dot11MgmtAssociationResp) NextLayerType() gopacket.LayerType { + return LayerTypeDot11InformationElement +} +func (m *Dot11MgmtAssociationResp) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 6 { + df.SetTruncated() + return fmt.Errorf("Dot11MgmtAssociationResp length %v too short, %v required", len(data), 6) + } + m.CapabilityInfo = binary.LittleEndian.Uint16(data[0:2]) + m.Status = Dot11Status(binary.LittleEndian.Uint16(data[2:4])) + m.AID = binary.LittleEndian.Uint16(data[4:6]) + m.Payload = data[6:] + return m.Dot11Mgmt.DecodeFromBytes(data, df) +} + +func (m Dot11MgmtAssociationResp) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + buf, err := b.PrependBytes(6) + + if err != nil { + return err + } + + binary.LittleEndian.PutUint16(buf[0:2], m.CapabilityInfo) + binary.LittleEndian.PutUint16(buf[2:4], uint16(m.Status)) + binary.LittleEndian.PutUint16(buf[4:6], m.AID) + + return nil +} + +type Dot11MgmtReassociationReq struct { + Dot11Mgmt + CapabilityInfo uint16 + ListenInterval uint16 + CurrentApAddress net.HardwareAddr +} + +func decodeDot11MgmtReassociationReq(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11MgmtReassociationReq{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11MgmtReassociationReq) LayerType() gopacket.LayerType { + return LayerTypeDot11MgmtReassociationReq +} +func (m *Dot11MgmtReassociationReq) CanDecode() gopacket.LayerClass { + return LayerTypeDot11MgmtReassociationReq +} +func (m *Dot11MgmtReassociationReq) NextLayerType() gopacket.LayerType { + return LayerTypeDot11InformationElement +} +func (m *Dot11MgmtReassociationReq) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 10 { + df.SetTruncated() + return fmt.Errorf("Dot11MgmtReassociationReq length %v too short, %v required", len(data), 10) + } + m.CapabilityInfo = binary.LittleEndian.Uint16(data[0:2]) + m.ListenInterval = binary.LittleEndian.Uint16(data[2:4]) + m.CurrentApAddress = net.HardwareAddr(data[4:10]) + m.Payload = data[10:] + return m.Dot11Mgmt.DecodeFromBytes(data, df) +} + +func (m Dot11MgmtReassociationReq) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + buf, err := b.PrependBytes(10) + + if err != nil { + return err + } + + binary.LittleEndian.PutUint16(buf[0:2], m.CapabilityInfo) + binary.LittleEndian.PutUint16(buf[2:4], m.ListenInterval) + + copy(buf[4:10], m.CurrentApAddress) + + return nil +} + +type Dot11MgmtReassociationResp struct { + Dot11Mgmt +} + +func decodeDot11MgmtReassociationResp(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11MgmtReassociationResp{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11MgmtReassociationResp) LayerType() gopacket.LayerType { + return LayerTypeDot11MgmtReassociationResp +} +func (m *Dot11MgmtReassociationResp) CanDecode() gopacket.LayerClass { + return LayerTypeDot11MgmtReassociationResp +} +func (m *Dot11MgmtReassociationResp) NextLayerType() gopacket.LayerType { + return LayerTypeDot11InformationElement +} + +type Dot11MgmtProbeReq struct { + Dot11Mgmt +} + +func decodeDot11MgmtProbeReq(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11MgmtProbeReq{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11MgmtProbeReq) LayerType() gopacket.LayerType { return LayerTypeDot11MgmtProbeReq } +func (m *Dot11MgmtProbeReq) CanDecode() gopacket.LayerClass { return LayerTypeDot11MgmtProbeReq } +func (m *Dot11MgmtProbeReq) NextLayerType() gopacket.LayerType { + return LayerTypeDot11InformationElement +} + +type Dot11MgmtProbeResp struct { + Dot11Mgmt + Timestamp uint64 + Interval uint16 + Flags uint16 +} + +func decodeDot11MgmtProbeResp(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11MgmtProbeResp{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11MgmtProbeResp) LayerType() gopacket.LayerType { return LayerTypeDot11MgmtProbeResp } +func (m *Dot11MgmtProbeResp) CanDecode() gopacket.LayerClass { return LayerTypeDot11MgmtProbeResp } +func (m *Dot11MgmtProbeResp) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 12 { + df.SetTruncated() + + return fmt.Errorf("Dot11MgmtProbeResp length %v too short, %v required", len(data), 12) + } + + m.Timestamp = binary.LittleEndian.Uint64(data[0:8]) + m.Interval = binary.LittleEndian.Uint16(data[8:10]) + m.Flags = binary.LittleEndian.Uint16(data[10:12]) + m.Payload = data[12:] + + return m.Dot11Mgmt.DecodeFromBytes(data, df) +} + +func (m *Dot11MgmtProbeResp) NextLayerType() gopacket.LayerType { + return LayerTypeDot11InformationElement +} + +func (m Dot11MgmtProbeResp) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + buf, err := b.PrependBytes(12) + + if err != nil { + return err + } + + binary.LittleEndian.PutUint64(buf[0:8], m.Timestamp) + binary.LittleEndian.PutUint16(buf[8:10], m.Interval) + binary.LittleEndian.PutUint16(buf[10:12], m.Flags) + + return nil +} + +type Dot11MgmtMeasurementPilot struct { + Dot11Mgmt +} + +func decodeDot11MgmtMeasurementPilot(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11MgmtMeasurementPilot{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11MgmtMeasurementPilot) LayerType() gopacket.LayerType { + return LayerTypeDot11MgmtMeasurementPilot +} +func (m *Dot11MgmtMeasurementPilot) CanDecode() gopacket.LayerClass { + return LayerTypeDot11MgmtMeasurementPilot +} + +type Dot11MgmtBeacon struct { + Dot11Mgmt + Timestamp uint64 + Interval uint16 + Flags uint16 +} + +func decodeDot11MgmtBeacon(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11MgmtBeacon{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11MgmtBeacon) LayerType() gopacket.LayerType { return LayerTypeDot11MgmtBeacon } +func (m *Dot11MgmtBeacon) CanDecode() gopacket.LayerClass { return LayerTypeDot11MgmtBeacon } +func (m *Dot11MgmtBeacon) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 12 { + df.SetTruncated() + return fmt.Errorf("Dot11MgmtBeacon length %v too short, %v required", len(data), 12) + } + m.Timestamp = binary.LittleEndian.Uint64(data[0:8]) + m.Interval = binary.LittleEndian.Uint16(data[8:10]) + m.Flags = binary.LittleEndian.Uint16(data[10:12]) + m.Payload = data[12:] + return m.Dot11Mgmt.DecodeFromBytes(data, df) +} + +func (m *Dot11MgmtBeacon) NextLayerType() gopacket.LayerType { return LayerTypeDot11InformationElement } + +func (m Dot11MgmtBeacon) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + buf, err := b.PrependBytes(12) + + if err != nil { + return err + } + + binary.LittleEndian.PutUint64(buf[0:8], m.Timestamp) + binary.LittleEndian.PutUint16(buf[8:10], m.Interval) + binary.LittleEndian.PutUint16(buf[10:12], m.Flags) + + return nil +} + +type Dot11MgmtATIM struct { + Dot11Mgmt +} + +func decodeDot11MgmtATIM(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11MgmtATIM{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11MgmtATIM) LayerType() gopacket.LayerType { return LayerTypeDot11MgmtATIM } +func (m *Dot11MgmtATIM) CanDecode() gopacket.LayerClass { return LayerTypeDot11MgmtATIM } + +type Dot11MgmtDisassociation struct { + Dot11Mgmt + Reason Dot11Reason +} + +func decodeDot11MgmtDisassociation(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11MgmtDisassociation{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11MgmtDisassociation) LayerType() gopacket.LayerType { + return LayerTypeDot11MgmtDisassociation +} +func (m *Dot11MgmtDisassociation) CanDecode() gopacket.LayerClass { + return LayerTypeDot11MgmtDisassociation +} +func (m *Dot11MgmtDisassociation) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 2 { + df.SetTruncated() + return fmt.Errorf("Dot11MgmtDisassociation length %v too short, %v required", len(data), 2) + } + m.Reason = Dot11Reason(binary.LittleEndian.Uint16(data[0:2])) + return m.Dot11Mgmt.DecodeFromBytes(data, df) +} + +func (m Dot11MgmtDisassociation) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + buf, err := b.PrependBytes(2) + + if err != nil { + return err + } + + binary.LittleEndian.PutUint16(buf[0:2], uint16(m.Reason)) + + return nil +} + +type Dot11MgmtAuthentication struct { + Dot11Mgmt + Algorithm Dot11Algorithm + Sequence uint16 + Status Dot11Status +} + +func decodeDot11MgmtAuthentication(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11MgmtAuthentication{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11MgmtAuthentication) LayerType() gopacket.LayerType { + return LayerTypeDot11MgmtAuthentication +} +func (m *Dot11MgmtAuthentication) CanDecode() gopacket.LayerClass { + return LayerTypeDot11MgmtAuthentication +} +func (m *Dot11MgmtAuthentication) NextLayerType() gopacket.LayerType { + return LayerTypeDot11InformationElement +} +func (m *Dot11MgmtAuthentication) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 6 { + df.SetTruncated() + return fmt.Errorf("Dot11MgmtAuthentication length %v too short, %v required", len(data), 6) + } + m.Algorithm = Dot11Algorithm(binary.LittleEndian.Uint16(data[0:2])) + m.Sequence = binary.LittleEndian.Uint16(data[2:4]) + m.Status = Dot11Status(binary.LittleEndian.Uint16(data[4:6])) + m.Payload = data[6:] + return m.Dot11Mgmt.DecodeFromBytes(data, df) +} + +func (m Dot11MgmtAuthentication) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + buf, err := b.PrependBytes(6) + + if err != nil { + return err + } + + binary.LittleEndian.PutUint16(buf[0:2], uint16(m.Algorithm)) + binary.LittleEndian.PutUint16(buf[2:4], m.Sequence) + binary.LittleEndian.PutUint16(buf[4:6], uint16(m.Status)) + + return nil +} + +type Dot11MgmtDeauthentication struct { + Dot11Mgmt + Reason Dot11Reason +} + +func decodeDot11MgmtDeauthentication(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11MgmtDeauthentication{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11MgmtDeauthentication) LayerType() gopacket.LayerType { + return LayerTypeDot11MgmtDeauthentication +} +func (m *Dot11MgmtDeauthentication) CanDecode() gopacket.LayerClass { + return LayerTypeDot11MgmtDeauthentication +} +func (m *Dot11MgmtDeauthentication) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 2 { + df.SetTruncated() + return fmt.Errorf("Dot11MgmtDeauthentication length %v too short, %v required", len(data), 2) + } + m.Reason = Dot11Reason(binary.LittleEndian.Uint16(data[0:2])) + return m.Dot11Mgmt.DecodeFromBytes(data, df) +} + +func (m Dot11MgmtDeauthentication) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + buf, err := b.PrependBytes(2) + + if err != nil { + return err + } + + binary.LittleEndian.PutUint16(buf[0:2], uint16(m.Reason)) + + return nil +} + +type Dot11MgmtAction struct { + Dot11Mgmt +} + +func decodeDot11MgmtAction(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11MgmtAction{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11MgmtAction) LayerType() gopacket.LayerType { return LayerTypeDot11MgmtAction } +func (m *Dot11MgmtAction) CanDecode() gopacket.LayerClass { return LayerTypeDot11MgmtAction } + +type Dot11MgmtActionNoAck struct { + Dot11Mgmt +} + +func decodeDot11MgmtActionNoAck(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11MgmtActionNoAck{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11MgmtActionNoAck) LayerType() gopacket.LayerType { return LayerTypeDot11MgmtActionNoAck } +func (m *Dot11MgmtActionNoAck) CanDecode() gopacket.LayerClass { return LayerTypeDot11MgmtActionNoAck } + +type Dot11MgmtArubaWLAN struct { + Dot11Mgmt +} + +func decodeDot11MgmtArubaWLAN(data []byte, p gopacket.PacketBuilder) error { + d := &Dot11MgmtArubaWLAN{} + return decodingLayerDecoder(d, data, p) +} + +func (m *Dot11MgmtArubaWLAN) LayerType() gopacket.LayerType { return LayerTypeDot11MgmtArubaWLAN } +func (m *Dot11MgmtArubaWLAN) CanDecode() gopacket.LayerClass { return LayerTypeDot11MgmtArubaWLAN } diff --git a/backend/vendor/github.com/google/gopacket/layers/dot1q.go b/backend/vendor/github.com/google/gopacket/layers/dot1q.go new file mode 100644 index 0000000..5cdd2f8 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/dot1q.go @@ -0,0 +1,75 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// Copyright 2009-2011 Andreas Krennmair. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "fmt" + "github.com/google/gopacket" +) + +// Dot1Q is the packet layer for 802.1Q VLAN headers. +type Dot1Q struct { + BaseLayer + Priority uint8 + DropEligible bool + VLANIdentifier uint16 + Type EthernetType +} + +// LayerType returns gopacket.LayerTypeDot1Q +func (d *Dot1Q) LayerType() gopacket.LayerType { return LayerTypeDot1Q } + +// DecodeFromBytes decodes the given bytes into this layer. +func (d *Dot1Q) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 4 { + df.SetTruncated() + return fmt.Errorf("802.1Q tag length %d too short", len(data)) + } + d.Priority = (data[0] & 0xE0) >> 5 + d.DropEligible = data[0]&0x10 != 0 + d.VLANIdentifier = binary.BigEndian.Uint16(data[:2]) & 0x0FFF + d.Type = EthernetType(binary.BigEndian.Uint16(data[2:4])) + d.BaseLayer = BaseLayer{Contents: data[:4], Payload: data[4:]} + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (d *Dot1Q) CanDecode() gopacket.LayerClass { + return LayerTypeDot1Q +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (d *Dot1Q) NextLayerType() gopacket.LayerType { + return d.Type.LayerType() +} + +func decodeDot1Q(data []byte, p gopacket.PacketBuilder) error { + d := &Dot1Q{} + return decodingLayerDecoder(d, data, p) +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (d *Dot1Q) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + bytes, err := b.PrependBytes(4) + if err != nil { + return err + } + if d.VLANIdentifier > 0xFFF { + return fmt.Errorf("vlan identifier %v is too high", d.VLANIdentifier) + } + firstBytes := uint16(d.Priority)<<13 | d.VLANIdentifier + if d.DropEligible { + firstBytes |= 0x1000 + } + binary.BigEndian.PutUint16(bytes, firstBytes) + binary.BigEndian.PutUint16(bytes[2:], uint16(d.Type)) + return nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/eap.go b/backend/vendor/github.com/google/gopacket/layers/eap.go new file mode 100644 index 0000000..54238e8 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/eap.go @@ -0,0 +1,114 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "fmt" + "github.com/google/gopacket" +) + +type EAPCode uint8 +type EAPType uint8 + +const ( + EAPCodeRequest EAPCode = 1 + EAPCodeResponse EAPCode = 2 + EAPCodeSuccess EAPCode = 3 + EAPCodeFailure EAPCode = 4 + + // EAPTypeNone means that this EAP layer has no Type or TypeData. + // Success and Failure EAPs will have this set. + EAPTypeNone EAPType = 0 + + EAPTypeIdentity EAPType = 1 + EAPTypeNotification EAPType = 2 + EAPTypeNACK EAPType = 3 + EAPTypeOTP EAPType = 4 + EAPTypeTokenCard EAPType = 5 +) + +// EAP defines an Extensible Authentication Protocol (rfc 3748) layer. +type EAP struct { + BaseLayer + Code EAPCode + Id uint8 + Length uint16 + Type EAPType + TypeData []byte +} + +// LayerType returns LayerTypeEAP. +func (e *EAP) LayerType() gopacket.LayerType { return LayerTypeEAP } + +// DecodeFromBytes decodes the given bytes into this layer. +func (e *EAP) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 4 { + df.SetTruncated() + return fmt.Errorf("EAP length %d too short", len(data)) + } + e.Code = EAPCode(data[0]) + e.Id = data[1] + e.Length = binary.BigEndian.Uint16(data[2:4]) + if len(data) < int(e.Length) { + df.SetTruncated() + return fmt.Errorf("EAP length %d too short, %d expected", len(data), e.Length) + } + switch { + case e.Length > 4: + e.Type = EAPType(data[4]) + e.TypeData = data[5:] + case e.Length == 4: + e.Type = 0 + e.TypeData = nil + default: + return fmt.Errorf("invalid EAP length %d", e.Length) + } + e.BaseLayer.Contents = data[:e.Length] + e.BaseLayer.Payload = data[e.Length:] // Should be 0 bytes + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (e *EAP) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + if opts.FixLengths { + e.Length = uint16(len(e.TypeData) + 1) + } + size := len(e.TypeData) + 4 + if size > 4 { + size++ + } + bytes, err := b.PrependBytes(size) + if err != nil { + return err + } + bytes[0] = byte(e.Code) + bytes[1] = e.Id + binary.BigEndian.PutUint16(bytes[2:], e.Length) + if size > 4 { + bytes[4] = byte(e.Type) + copy(bytes[5:], e.TypeData) + } + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (e *EAP) CanDecode() gopacket.LayerClass { + return LayerTypeEAP +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (e *EAP) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypeZero +} + +func decodeEAP(data []byte, p gopacket.PacketBuilder) error { + e := &EAP{} + return decodingLayerDecoder(e, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/eapol.go b/backend/vendor/github.com/google/gopacket/layers/eapol.go new file mode 100644 index 0000000..902598a --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/eapol.go @@ -0,0 +1,302 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "fmt" + "github.com/google/gopacket" +) + +// EAPOL defines an EAP over LAN (802.1x) layer. +type EAPOL struct { + BaseLayer + Version uint8 + Type EAPOLType + Length uint16 +} + +// LayerType returns LayerTypeEAPOL. +func (e *EAPOL) LayerType() gopacket.LayerType { return LayerTypeEAPOL } + +// DecodeFromBytes decodes the given bytes into this layer. +func (e *EAPOL) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 4 { + df.SetTruncated() + return fmt.Errorf("EAPOL length %d too short", len(data)) + } + e.Version = data[0] + e.Type = EAPOLType(data[1]) + e.Length = binary.BigEndian.Uint16(data[2:4]) + e.BaseLayer = BaseLayer{data[:4], data[4:]} + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer +func (e *EAPOL) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + bytes, _ := b.PrependBytes(4) + bytes[0] = e.Version + bytes[1] = byte(e.Type) + binary.BigEndian.PutUint16(bytes[2:], e.Length) + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (e *EAPOL) CanDecode() gopacket.LayerClass { + return LayerTypeEAPOL +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (e *EAPOL) NextLayerType() gopacket.LayerType { + return e.Type.LayerType() +} + +func decodeEAPOL(data []byte, p gopacket.PacketBuilder) error { + e := &EAPOL{} + return decodingLayerDecoder(e, data, p) +} + +// EAPOLKeyDescriptorType is an enumeration of key descriptor types +// as specified by 802.1x in the EAPOL-Key frame +type EAPOLKeyDescriptorType uint8 + +// Enumeration of EAPOLKeyDescriptorType +const ( + EAPOLKeyDescriptorTypeRC4 EAPOLKeyDescriptorType = 1 + EAPOLKeyDescriptorTypeDot11 EAPOLKeyDescriptorType = 2 + EAPOLKeyDescriptorTypeWPA EAPOLKeyDescriptorType = 254 +) + +func (kdt EAPOLKeyDescriptorType) String() string { + switch kdt { + case EAPOLKeyDescriptorTypeRC4: + return "RC4" + case EAPOLKeyDescriptorTypeDot11: + return "802.11" + case EAPOLKeyDescriptorTypeWPA: + return "WPA" + default: + return fmt.Sprintf("unknown descriptor type %d", kdt) + } +} + +// EAPOLKeyDescriptorVersion is an enumeration of versions specifying the +// encryption algorithm for the key data and the authentication for the +// message integrity code (MIC) +type EAPOLKeyDescriptorVersion uint8 + +// Enumeration of EAPOLKeyDescriptorVersion +const ( + EAPOLKeyDescriptorVersionOther EAPOLKeyDescriptorVersion = 0 + EAPOLKeyDescriptorVersionRC4HMACMD5 EAPOLKeyDescriptorVersion = 1 + EAPOLKeyDescriptorVersionAESHMACSHA1 EAPOLKeyDescriptorVersion = 2 + EAPOLKeyDescriptorVersionAES128CMAC EAPOLKeyDescriptorVersion = 3 +) + +func (v EAPOLKeyDescriptorVersion) String() string { + switch v { + case EAPOLKeyDescriptorVersionOther: + return "Other" + case EAPOLKeyDescriptorVersionRC4HMACMD5: + return "RC4-HMAC-MD5" + case EAPOLKeyDescriptorVersionAESHMACSHA1: + return "AES-HMAC-SHA1-128" + case EAPOLKeyDescriptorVersionAES128CMAC: + return "AES-128-CMAC" + default: + return fmt.Sprintf("unknown version %d", v) + } +} + +// EAPOLKeyType is an enumeration of key derivation types describing +// the purpose of the keys being derived. +type EAPOLKeyType uint8 + +// Enumeration of EAPOLKeyType +const ( + EAPOLKeyTypeGroupSMK EAPOLKeyType = 0 + EAPOLKeyTypePairwise EAPOLKeyType = 1 +) + +func (kt EAPOLKeyType) String() string { + switch kt { + case EAPOLKeyTypeGroupSMK: + return "Group/SMK" + case EAPOLKeyTypePairwise: + return "Pairwise" + default: + return fmt.Sprintf("unknown key type %d", kt) + } +} + +// EAPOLKey defines an EAPOL-Key frame for 802.1x authentication +type EAPOLKey struct { + BaseLayer + KeyDescriptorType EAPOLKeyDescriptorType + KeyDescriptorVersion EAPOLKeyDescriptorVersion + KeyType EAPOLKeyType + KeyIndex uint8 + Install bool + KeyACK bool + KeyMIC bool + Secure bool + MICError bool + Request bool + HasEncryptedKeyData bool + SMKMessage bool + KeyLength uint16 + ReplayCounter uint64 + Nonce []byte + IV []byte + RSC uint64 + ID uint64 + MIC []byte + KeyDataLength uint16 + EncryptedKeyData []byte +} + +// LayerType returns LayerTypeEAPOLKey. +func (ek *EAPOLKey) LayerType() gopacket.LayerType { + return LayerTypeEAPOLKey +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (ek *EAPOLKey) CanDecode() gopacket.LayerType { + return LayerTypeEAPOLKey +} + +// NextLayerType returns layers.LayerTypeDot11InformationElement if the key +// data exists and is unencrypted, otherwise it does not expect a next layer. +func (ek *EAPOLKey) NextLayerType() gopacket.LayerType { + if !ek.HasEncryptedKeyData && ek.KeyDataLength > 0 { + return LayerTypeDot11InformationElement + } + return gopacket.LayerTypePayload +} + +const eapolKeyFrameLen = 95 + +// DecodeFromBytes decodes the given bytes into this layer. +func (ek *EAPOLKey) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < eapolKeyFrameLen { + df.SetTruncated() + return fmt.Errorf("EAPOLKey length %v too short, %v required", + len(data), eapolKeyFrameLen) + } + + ek.KeyDescriptorType = EAPOLKeyDescriptorType(data[0]) + + info := binary.BigEndian.Uint16(data[1:3]) + ek.KeyDescriptorVersion = EAPOLKeyDescriptorVersion(info & 0x0007) + ek.KeyType = EAPOLKeyType((info & 0x0008) >> 3) + ek.KeyIndex = uint8((info & 0x0030) >> 4) + ek.Install = (info & 0x0040) != 0 + ek.KeyACK = (info & 0x0080) != 0 + ek.KeyMIC = (info & 0x0100) != 0 + ek.Secure = (info & 0x0200) != 0 + ek.MICError = (info & 0x0400) != 0 + ek.Request = (info & 0x0800) != 0 + ek.HasEncryptedKeyData = (info & 0x1000) != 0 + ek.SMKMessage = (info & 0x2000) != 0 + + ek.KeyLength = binary.BigEndian.Uint16(data[3:5]) + ek.ReplayCounter = binary.BigEndian.Uint64(data[5:13]) + + ek.Nonce = data[13:45] + ek.IV = data[45:61] + ek.RSC = binary.BigEndian.Uint64(data[61:69]) + ek.ID = binary.BigEndian.Uint64(data[69:77]) + ek.MIC = data[77:93] + + ek.KeyDataLength = binary.BigEndian.Uint16(data[93:95]) + + totalLength := eapolKeyFrameLen + int(ek.KeyDataLength) + if len(data) < totalLength { + df.SetTruncated() + return fmt.Errorf("EAPOLKey data length %d too short, %d required", + len(data)-eapolKeyFrameLen, ek.KeyDataLength) + } + + if ek.HasEncryptedKeyData { + ek.EncryptedKeyData = data[eapolKeyFrameLen:totalLength] + ek.BaseLayer = BaseLayer{ + Contents: data[:totalLength], + Payload: data[totalLength:], + } + } else { + ek.BaseLayer = BaseLayer{ + Contents: data[:eapolKeyFrameLen], + Payload: data[eapolKeyFrameLen:], + } + } + + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (ek *EAPOLKey) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + buf, err := b.PrependBytes(eapolKeyFrameLen + len(ek.EncryptedKeyData)) + if err != nil { + return err + } + + buf[0] = byte(ek.KeyDescriptorType) + + var info uint16 + info |= uint16(ek.KeyDescriptorVersion) + info |= uint16(ek.KeyType) << 3 + info |= uint16(ek.KeyIndex) << 4 + if ek.Install { + info |= 0x0040 + } + if ek.KeyACK { + info |= 0x0080 + } + if ek.KeyMIC { + info |= 0x0100 + } + if ek.Secure { + info |= 0x0200 + } + if ek.MICError { + info |= 0x0400 + } + if ek.Request { + info |= 0x0800 + } + if ek.HasEncryptedKeyData { + info |= 0x1000 + } + if ek.SMKMessage { + info |= 0x2000 + } + binary.BigEndian.PutUint16(buf[1:3], info) + + binary.BigEndian.PutUint16(buf[3:5], ek.KeyLength) + binary.BigEndian.PutUint64(buf[5:13], ek.ReplayCounter) + + copy(buf[13:45], ek.Nonce) + copy(buf[45:61], ek.IV) + binary.BigEndian.PutUint64(buf[61:69], ek.RSC) + binary.BigEndian.PutUint64(buf[69:77], ek.ID) + copy(buf[77:93], ek.MIC) + + binary.BigEndian.PutUint16(buf[93:95], ek.KeyDataLength) + if len(ek.EncryptedKeyData) > 0 { + copy(buf[95:95+len(ek.EncryptedKeyData)], ek.EncryptedKeyData) + } + + return nil +} + +func decodeEAPOLKey(data []byte, p gopacket.PacketBuilder) error { + ek := &EAPOLKey{} + return decodingLayerDecoder(ek, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/endpoints.go b/backend/vendor/github.com/google/gopacket/layers/endpoints.go new file mode 100644 index 0000000..4c91cc3 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/endpoints.go @@ -0,0 +1,97 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "github.com/google/gopacket" + "net" + "strconv" +) + +var ( + // We use two different endpoint types for IPv4 vs IPv6 addresses, so that + // ordering with endpointA.LessThan(endpointB) sanely groups all IPv4 + // addresses and all IPv6 addresses, such that IPv6 > IPv4 for all addresses. + EndpointIPv4 = gopacket.RegisterEndpointType(1, gopacket.EndpointTypeMetadata{Name: "IPv4", Formatter: func(b []byte) string { + return net.IP(b).String() + }}) + EndpointIPv6 = gopacket.RegisterEndpointType(2, gopacket.EndpointTypeMetadata{Name: "IPv6", Formatter: func(b []byte) string { + return net.IP(b).String() + }}) + + EndpointMAC = gopacket.RegisterEndpointType(3, gopacket.EndpointTypeMetadata{Name: "MAC", Formatter: func(b []byte) string { + return net.HardwareAddr(b).String() + }}) + EndpointTCPPort = gopacket.RegisterEndpointType(4, gopacket.EndpointTypeMetadata{Name: "TCP", Formatter: func(b []byte) string { + return strconv.Itoa(int(binary.BigEndian.Uint16(b))) + }}) + EndpointUDPPort = gopacket.RegisterEndpointType(5, gopacket.EndpointTypeMetadata{Name: "UDP", Formatter: func(b []byte) string { + return strconv.Itoa(int(binary.BigEndian.Uint16(b))) + }}) + EndpointSCTPPort = gopacket.RegisterEndpointType(6, gopacket.EndpointTypeMetadata{Name: "SCTP", Formatter: func(b []byte) string { + return strconv.Itoa(int(binary.BigEndian.Uint16(b))) + }}) + EndpointRUDPPort = gopacket.RegisterEndpointType(7, gopacket.EndpointTypeMetadata{Name: "RUDP", Formatter: func(b []byte) string { + return strconv.Itoa(int(b[0])) + }}) + EndpointUDPLitePort = gopacket.RegisterEndpointType(8, gopacket.EndpointTypeMetadata{Name: "UDPLite", Formatter: func(b []byte) string { + return strconv.Itoa(int(binary.BigEndian.Uint16(b))) + }}) + EndpointPPP = gopacket.RegisterEndpointType(9, gopacket.EndpointTypeMetadata{Name: "PPP", Formatter: func([]byte) string { + return "point" + }}) +) + +// NewIPEndpoint creates a new IP (v4 or v6) endpoint from a net.IP address. +// It returns gopacket.InvalidEndpoint if the IP address is invalid. +func NewIPEndpoint(a net.IP) gopacket.Endpoint { + ipv4 := a.To4() + if ipv4 != nil { + return gopacket.NewEndpoint(EndpointIPv4, []byte(ipv4)) + } + + ipv6 := a.To16() + if ipv6 != nil { + return gopacket.NewEndpoint(EndpointIPv6, []byte(ipv6)) + } + + return gopacket.InvalidEndpoint +} + +// NewMACEndpoint returns a new MAC address endpoint. +func NewMACEndpoint(a net.HardwareAddr) gopacket.Endpoint { + return gopacket.NewEndpoint(EndpointMAC, []byte(a)) +} +func newPortEndpoint(t gopacket.EndpointType, p uint16) gopacket.Endpoint { + return gopacket.NewEndpoint(t, []byte{byte(p >> 8), byte(p)}) +} + +// NewTCPPortEndpoint returns an endpoint based on a TCP port. +func NewTCPPortEndpoint(p TCPPort) gopacket.Endpoint { + return newPortEndpoint(EndpointTCPPort, uint16(p)) +} + +// NewUDPPortEndpoint returns an endpoint based on a UDP port. +func NewUDPPortEndpoint(p UDPPort) gopacket.Endpoint { + return newPortEndpoint(EndpointUDPPort, uint16(p)) +} + +// NewSCTPPortEndpoint returns an endpoint based on a SCTP port. +func NewSCTPPortEndpoint(p SCTPPort) gopacket.Endpoint { + return newPortEndpoint(EndpointSCTPPort, uint16(p)) +} + +// NewRUDPPortEndpoint returns an endpoint based on a RUDP port. +func NewRUDPPortEndpoint(p RUDPPort) gopacket.Endpoint { + return gopacket.NewEndpoint(EndpointRUDPPort, []byte{byte(p)}) +} + +// NewUDPLitePortEndpoint returns an endpoint based on a UDPLite port. +func NewUDPLitePortEndpoint(p UDPLitePort) gopacket.Endpoint { + return newPortEndpoint(EndpointUDPLitePort, uint16(p)) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/enums.go b/backend/vendor/github.com/google/gopacket/layers/enums.go new file mode 100644 index 0000000..8427bda --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/enums.go @@ -0,0 +1,443 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// Copyright 2009-2011 Andreas Krennmair. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "fmt" + "runtime" + + "github.com/google/gopacket" +) + +// EnumMetadata keeps track of a set of metadata for each enumeration value +// for protocol enumerations. +type EnumMetadata struct { + // DecodeWith is the decoder to use to decode this protocol's data. + DecodeWith gopacket.Decoder + // Name is the name of the enumeration value. + Name string + // LayerType is the layer type implied by the given enum. + LayerType gopacket.LayerType +} + +// EthernetType is an enumeration of ethernet type values, and acts as a decoder +// for any type it supports. +type EthernetType uint16 + +const ( + // EthernetTypeLLC is not an actual ethernet type. It is instead a + // placeholder we use in Ethernet frames that use the 802.3 standard of + // srcmac|dstmac|length|LLC instead of srcmac|dstmac|ethertype. + EthernetTypeLLC EthernetType = 0 + EthernetTypeIPv4 EthernetType = 0x0800 + EthernetTypeARP EthernetType = 0x0806 + EthernetTypeIPv6 EthernetType = 0x86DD + EthernetTypeCiscoDiscovery EthernetType = 0x2000 + EthernetTypeNortelDiscovery EthernetType = 0x01a2 + EthernetTypeTransparentEthernetBridging EthernetType = 0x6558 + EthernetTypeDot1Q EthernetType = 0x8100 + EthernetTypePPP EthernetType = 0x880b + EthernetTypePPPoEDiscovery EthernetType = 0x8863 + EthernetTypePPPoESession EthernetType = 0x8864 + EthernetTypeMPLSUnicast EthernetType = 0x8847 + EthernetTypeMPLSMulticast EthernetType = 0x8848 + EthernetTypeEAPOL EthernetType = 0x888e + EthernetTypeERSPAN EthernetType = 0x88be + EthernetTypeQinQ EthernetType = 0x88a8 + EthernetTypeLinkLayerDiscovery EthernetType = 0x88cc + EthernetTypeEthernetCTP EthernetType = 0x9000 +) + +// IPProtocol is an enumeration of IP protocol values, and acts as a decoder +// for any type it supports. +type IPProtocol uint8 + +const ( + IPProtocolIPv6HopByHop IPProtocol = 0 + IPProtocolICMPv4 IPProtocol = 1 + IPProtocolIGMP IPProtocol = 2 + IPProtocolIPv4 IPProtocol = 4 + IPProtocolTCP IPProtocol = 6 + IPProtocolUDP IPProtocol = 17 + IPProtocolRUDP IPProtocol = 27 + IPProtocolIPv6 IPProtocol = 41 + IPProtocolIPv6Routing IPProtocol = 43 + IPProtocolIPv6Fragment IPProtocol = 44 + IPProtocolGRE IPProtocol = 47 + IPProtocolESP IPProtocol = 50 + IPProtocolAH IPProtocol = 51 + IPProtocolICMPv6 IPProtocol = 58 + IPProtocolNoNextHeader IPProtocol = 59 + IPProtocolIPv6Destination IPProtocol = 60 + IPProtocolOSPF IPProtocol = 89 + IPProtocolIPIP IPProtocol = 94 + IPProtocolEtherIP IPProtocol = 97 + IPProtocolVRRP IPProtocol = 112 + IPProtocolSCTP IPProtocol = 132 + IPProtocolUDPLite IPProtocol = 136 + IPProtocolMPLSInIP IPProtocol = 137 +) + +// LinkType is an enumeration of link types, and acts as a decoder for any +// link type it supports. +type LinkType uint8 + +const ( + // According to pcap-linktype(7) and http://www.tcpdump.org/linktypes.html + LinkTypeNull LinkType = 0 + LinkTypeEthernet LinkType = 1 + LinkTypeAX25 LinkType = 3 + LinkTypeTokenRing LinkType = 6 + LinkTypeArcNet LinkType = 7 + LinkTypeSLIP LinkType = 8 + LinkTypePPP LinkType = 9 + LinkTypeFDDI LinkType = 10 + LinkTypePPP_HDLC LinkType = 50 + LinkTypePPPEthernet LinkType = 51 + LinkTypeATM_RFC1483 LinkType = 100 + LinkTypeRaw LinkType = 101 + LinkTypeC_HDLC LinkType = 104 + LinkTypeIEEE802_11 LinkType = 105 + LinkTypeFRelay LinkType = 107 + LinkTypeLoop LinkType = 108 + LinkTypeLinuxSLL LinkType = 113 + LinkTypeLTalk LinkType = 114 + LinkTypePFLog LinkType = 117 + LinkTypePrismHeader LinkType = 119 + LinkTypeIPOverFC LinkType = 122 + LinkTypeSunATM LinkType = 123 + LinkTypeIEEE80211Radio LinkType = 127 + LinkTypeARCNetLinux LinkType = 129 + LinkTypeIPOver1394 LinkType = 138 + LinkTypeMTP2Phdr LinkType = 139 + LinkTypeMTP2 LinkType = 140 + LinkTypeMTP3 LinkType = 141 + LinkTypeSCCP LinkType = 142 + LinkTypeDOCSIS LinkType = 143 + LinkTypeLinuxIRDA LinkType = 144 + LinkTypeLinuxLAPD LinkType = 177 + LinkTypeLinuxUSB LinkType = 220 + LinkTypeFC2 LinkType = 224 + LinkTypeFC2Framed LinkType = 225 + LinkTypeIPv4 LinkType = 228 + LinkTypeIPv6 LinkType = 229 +) + +// PPPoECode is the PPPoE code enum, taken from http://tools.ietf.org/html/rfc2516 +type PPPoECode uint8 + +const ( + PPPoECodePADI PPPoECode = 0x09 + PPPoECodePADO PPPoECode = 0x07 + PPPoECodePADR PPPoECode = 0x19 + PPPoECodePADS PPPoECode = 0x65 + PPPoECodePADT PPPoECode = 0xA7 + PPPoECodeSession PPPoECode = 0x00 +) + +// PPPType is an enumeration of PPP type values, and acts as a decoder for any +// type it supports. +type PPPType uint16 + +const ( + PPPTypeIPv4 PPPType = 0x0021 + PPPTypeIPv6 PPPType = 0x0057 + PPPTypeMPLSUnicast PPPType = 0x0281 + PPPTypeMPLSMulticast PPPType = 0x0283 +) + +// SCTPChunkType is an enumeration of chunk types inside SCTP packets. +type SCTPChunkType uint8 + +const ( + SCTPChunkTypeData SCTPChunkType = 0 + SCTPChunkTypeInit SCTPChunkType = 1 + SCTPChunkTypeInitAck SCTPChunkType = 2 + SCTPChunkTypeSack SCTPChunkType = 3 + SCTPChunkTypeHeartbeat SCTPChunkType = 4 + SCTPChunkTypeHeartbeatAck SCTPChunkType = 5 + SCTPChunkTypeAbort SCTPChunkType = 6 + SCTPChunkTypeShutdown SCTPChunkType = 7 + SCTPChunkTypeShutdownAck SCTPChunkType = 8 + SCTPChunkTypeError SCTPChunkType = 9 + SCTPChunkTypeCookieEcho SCTPChunkType = 10 + SCTPChunkTypeCookieAck SCTPChunkType = 11 + SCTPChunkTypeShutdownComplete SCTPChunkType = 14 +) + +// FDDIFrameControl is an enumeration of FDDI frame control bytes. +type FDDIFrameControl uint8 + +const ( + FDDIFrameControlLLC FDDIFrameControl = 0x50 +) + +// EAPOLType is an enumeration of EAPOL packet types. +type EAPOLType uint8 + +const ( + EAPOLTypeEAP EAPOLType = 0 + EAPOLTypeStart EAPOLType = 1 + EAPOLTypeLogOff EAPOLType = 2 + EAPOLTypeKey EAPOLType = 3 + EAPOLTypeASFAlert EAPOLType = 4 +) + +// ProtocolFamily is the set of values defined as PF_* in sys/socket.h +type ProtocolFamily uint8 + +const ( + ProtocolFamilyIPv4 ProtocolFamily = 2 + // BSDs use different values for INET6... glory be. These values taken from + // tcpdump 4.3.0. + ProtocolFamilyIPv6BSD ProtocolFamily = 24 + ProtocolFamilyIPv6FreeBSD ProtocolFamily = 28 + ProtocolFamilyIPv6Darwin ProtocolFamily = 30 + ProtocolFamilyIPv6Linux ProtocolFamily = 10 +) + +// Dot11Type is a combination of IEEE 802.11 frame's Type and Subtype fields. +// By combining these two fields together into a single type, we're able to +// provide a String function that correctly displays the subtype given the +// top-level type. +// +// If you just care about the top-level type, use the MainType function. +type Dot11Type uint8 + +// MainType strips the subtype information from the given type, +// returning just the overarching type (Mgmt, Ctrl, Data, Reserved). +func (d Dot11Type) MainType() Dot11Type { + return d & dot11TypeMask +} + +func (d Dot11Type) QOS() bool { + return d&dot11QOSMask == Dot11TypeDataQOSData +} + +const ( + Dot11TypeMgmt Dot11Type = 0x00 + Dot11TypeCtrl Dot11Type = 0x01 + Dot11TypeData Dot11Type = 0x02 + Dot11TypeReserved Dot11Type = 0x03 + dot11TypeMask = 0x03 + dot11QOSMask = 0x23 + + // The following are type/subtype conglomerations. + + // Management + Dot11TypeMgmtAssociationReq Dot11Type = 0x00 + Dot11TypeMgmtAssociationResp Dot11Type = 0x04 + Dot11TypeMgmtReassociationReq Dot11Type = 0x08 + Dot11TypeMgmtReassociationResp Dot11Type = 0x0c + Dot11TypeMgmtProbeReq Dot11Type = 0x10 + Dot11TypeMgmtProbeResp Dot11Type = 0x14 + Dot11TypeMgmtMeasurementPilot Dot11Type = 0x18 + Dot11TypeMgmtBeacon Dot11Type = 0x20 + Dot11TypeMgmtATIM Dot11Type = 0x24 + Dot11TypeMgmtDisassociation Dot11Type = 0x28 + Dot11TypeMgmtAuthentication Dot11Type = 0x2c + Dot11TypeMgmtDeauthentication Dot11Type = 0x30 + Dot11TypeMgmtAction Dot11Type = 0x34 + Dot11TypeMgmtActionNoAck Dot11Type = 0x38 + + // Control + Dot11TypeCtrlWrapper Dot11Type = 0x1d + Dot11TypeCtrlBlockAckReq Dot11Type = 0x21 + Dot11TypeCtrlBlockAck Dot11Type = 0x25 + Dot11TypeCtrlPowersavePoll Dot11Type = 0x29 + Dot11TypeCtrlRTS Dot11Type = 0x2d + Dot11TypeCtrlCTS Dot11Type = 0x31 + Dot11TypeCtrlAck Dot11Type = 0x35 + Dot11TypeCtrlCFEnd Dot11Type = 0x39 + Dot11TypeCtrlCFEndAck Dot11Type = 0x3d + + // Data + Dot11TypeDataCFAck Dot11Type = 0x06 + Dot11TypeDataCFPoll Dot11Type = 0x0a + Dot11TypeDataCFAckPoll Dot11Type = 0x0e + Dot11TypeDataNull Dot11Type = 0x12 + Dot11TypeDataCFAckNoData Dot11Type = 0x16 + Dot11TypeDataCFPollNoData Dot11Type = 0x1a + Dot11TypeDataCFAckPollNoData Dot11Type = 0x1e + Dot11TypeDataQOSData Dot11Type = 0x22 + Dot11TypeDataQOSDataCFAck Dot11Type = 0x26 + Dot11TypeDataQOSDataCFPoll Dot11Type = 0x2a + Dot11TypeDataQOSDataCFAckPoll Dot11Type = 0x2e + Dot11TypeDataQOSNull Dot11Type = 0x32 + Dot11TypeDataQOSCFPollNoData Dot11Type = 0x3a + Dot11TypeDataQOSCFAckPollNoData Dot11Type = 0x3e +) + +// Decode a raw v4 or v6 IP packet. +func decodeIPv4or6(data []byte, p gopacket.PacketBuilder) error { + version := data[0] >> 4 + switch version { + case 4: + return decodeIPv4(data, p) + case 6: + return decodeIPv6(data, p) + } + return fmt.Errorf("Invalid IP packet version %v", version) +} + +func initActualTypeData() { + // Each of the XXXTypeMetadata arrays contains mappings of how to handle enum + // values for various enum types in gopacket/layers. + // These arrays are actually created by gen2.go and stored in + // enums_generated.go. + // + // So, EthernetTypeMetadata[2] contains information on how to handle EthernetType + // 2, including which name to give it and which decoder to use to decode + // packet data of that type. These arrays are filled by default with all of the + // protocols gopacket/layers knows how to handle, but users of the library can + // add new decoders or override existing ones. For example, if you write a better + // TCP decoder, you can override IPProtocolMetadata[IPProtocolTCP].DecodeWith + // with your new decoder, and all gopacket/layers decoding will use your new + // decoder whenever they encounter that IPProtocol. + + // Here we link up all enumerations with their respective names and decoders. + EthernetTypeMetadata[EthernetTypeLLC] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeLLC), Name: "LLC", LayerType: LayerTypeLLC} + EthernetTypeMetadata[EthernetTypeIPv4] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv4), Name: "IPv4", LayerType: LayerTypeIPv4} + EthernetTypeMetadata[EthernetTypeIPv6] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv6), Name: "IPv6", LayerType: LayerTypeIPv6} + EthernetTypeMetadata[EthernetTypeARP] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeARP), Name: "ARP", LayerType: LayerTypeARP} + EthernetTypeMetadata[EthernetTypeDot1Q] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot1Q), Name: "Dot1Q", LayerType: LayerTypeDot1Q} + EthernetTypeMetadata[EthernetTypePPP] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodePPP), Name: "PPP", LayerType: LayerTypePPP} + EthernetTypeMetadata[EthernetTypePPPoEDiscovery] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodePPPoE), Name: "PPPoEDiscovery", LayerType: LayerTypePPPoE} + EthernetTypeMetadata[EthernetTypePPPoESession] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodePPPoE), Name: "PPPoESession", LayerType: LayerTypePPPoE} + EthernetTypeMetadata[EthernetTypeEthernetCTP] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeEthernetCTP), Name: "EthernetCTP", LayerType: LayerTypeEthernetCTP} + EthernetTypeMetadata[EthernetTypeCiscoDiscovery] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeCiscoDiscovery), Name: "CiscoDiscovery", LayerType: LayerTypeCiscoDiscovery} + EthernetTypeMetadata[EthernetTypeNortelDiscovery] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeNortelDiscovery), Name: "NortelDiscovery", LayerType: LayerTypeNortelDiscovery} + EthernetTypeMetadata[EthernetTypeLinkLayerDiscovery] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeLinkLayerDiscovery), Name: "LinkLayerDiscovery", LayerType: LayerTypeLinkLayerDiscovery} + EthernetTypeMetadata[EthernetTypeMPLSUnicast] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeMPLS), Name: "MPLSUnicast", LayerType: LayerTypeMPLS} + EthernetTypeMetadata[EthernetTypeMPLSMulticast] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeMPLS), Name: "MPLSMulticast", LayerType: LayerTypeMPLS} + EthernetTypeMetadata[EthernetTypeEAPOL] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeEAPOL), Name: "EAPOL", LayerType: LayerTypeEAPOL} + EthernetTypeMetadata[EthernetTypeQinQ] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot1Q), Name: "Dot1Q", LayerType: LayerTypeDot1Q} + EthernetTypeMetadata[EthernetTypeTransparentEthernetBridging] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeEthernet), Name: "TransparentEthernetBridging", LayerType: LayerTypeEthernet} + EthernetTypeMetadata[EthernetTypeERSPAN] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeERSPANII), Name: "ERSPAN Type II", LayerType: LayerTypeERSPANII} + + IPProtocolMetadata[IPProtocolIPv4] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv4), Name: "IPv4", LayerType: LayerTypeIPv4} + IPProtocolMetadata[IPProtocolTCP] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeTCP), Name: "TCP", LayerType: LayerTypeTCP} + IPProtocolMetadata[IPProtocolUDP] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeUDP), Name: "UDP", LayerType: LayerTypeUDP} + IPProtocolMetadata[IPProtocolICMPv4] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeICMPv4), Name: "ICMPv4", LayerType: LayerTypeICMPv4} + IPProtocolMetadata[IPProtocolICMPv6] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeICMPv6), Name: "ICMPv6", LayerType: LayerTypeICMPv6} + IPProtocolMetadata[IPProtocolSCTP] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeSCTP), Name: "SCTP", LayerType: LayerTypeSCTP} + IPProtocolMetadata[IPProtocolIPv6] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv6), Name: "IPv6", LayerType: LayerTypeIPv6} + IPProtocolMetadata[IPProtocolIPIP] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv4), Name: "IPv4", LayerType: LayerTypeIPv4} + IPProtocolMetadata[IPProtocolEtherIP] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeEtherIP), Name: "EtherIP", LayerType: LayerTypeEtherIP} + IPProtocolMetadata[IPProtocolRUDP] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeRUDP), Name: "RUDP", LayerType: LayerTypeRUDP} + IPProtocolMetadata[IPProtocolGRE] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeGRE), Name: "GRE", LayerType: LayerTypeGRE} + IPProtocolMetadata[IPProtocolIPv6HopByHop] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv6HopByHop), Name: "IPv6HopByHop", LayerType: LayerTypeIPv6HopByHop} + IPProtocolMetadata[IPProtocolIPv6Routing] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv6Routing), Name: "IPv6Routing", LayerType: LayerTypeIPv6Routing} + IPProtocolMetadata[IPProtocolIPv6Fragment] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv6Fragment), Name: "IPv6Fragment", LayerType: LayerTypeIPv6Fragment} + IPProtocolMetadata[IPProtocolIPv6Destination] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv6Destination), Name: "IPv6Destination", LayerType: LayerTypeIPv6Destination} + IPProtocolMetadata[IPProtocolOSPF] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeOSPF), Name: "OSPF", LayerType: LayerTypeOSPF} + IPProtocolMetadata[IPProtocolAH] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPSecAH), Name: "IPSecAH", LayerType: LayerTypeIPSecAH} + IPProtocolMetadata[IPProtocolESP] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPSecESP), Name: "IPSecESP", LayerType: LayerTypeIPSecESP} + IPProtocolMetadata[IPProtocolUDPLite] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeUDPLite), Name: "UDPLite", LayerType: LayerTypeUDPLite} + IPProtocolMetadata[IPProtocolMPLSInIP] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeMPLS), Name: "MPLS", LayerType: LayerTypeMPLS} + IPProtocolMetadata[IPProtocolNoNextHeader] = EnumMetadata{DecodeWith: gopacket.DecodePayload, Name: "NoNextHeader", LayerType: gopacket.LayerTypePayload} + IPProtocolMetadata[IPProtocolIGMP] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIGMP), Name: "IGMP", LayerType: LayerTypeIGMP} + IPProtocolMetadata[IPProtocolVRRP] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeVRRP), Name: "VRRP", LayerType: LayerTypeVRRP} + + SCTPChunkTypeMetadata[SCTPChunkTypeData] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeSCTPData), Name: "Data"} + SCTPChunkTypeMetadata[SCTPChunkTypeInit] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeSCTPInit), Name: "Init"} + SCTPChunkTypeMetadata[SCTPChunkTypeInitAck] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeSCTPInit), Name: "InitAck"} + SCTPChunkTypeMetadata[SCTPChunkTypeSack] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeSCTPSack), Name: "Sack"} + SCTPChunkTypeMetadata[SCTPChunkTypeHeartbeat] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeSCTPHeartbeat), Name: "Heartbeat"} + SCTPChunkTypeMetadata[SCTPChunkTypeHeartbeatAck] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeSCTPHeartbeat), Name: "HeartbeatAck"} + SCTPChunkTypeMetadata[SCTPChunkTypeAbort] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeSCTPError), Name: "Abort"} + SCTPChunkTypeMetadata[SCTPChunkTypeError] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeSCTPError), Name: "Error"} + SCTPChunkTypeMetadata[SCTPChunkTypeShutdown] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeSCTPShutdown), Name: "Shutdown"} + SCTPChunkTypeMetadata[SCTPChunkTypeShutdownAck] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeSCTPShutdownAck), Name: "ShutdownAck"} + SCTPChunkTypeMetadata[SCTPChunkTypeCookieEcho] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeSCTPCookieEcho), Name: "CookieEcho"} + SCTPChunkTypeMetadata[SCTPChunkTypeCookieAck] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeSCTPEmptyLayer), Name: "CookieAck"} + SCTPChunkTypeMetadata[SCTPChunkTypeShutdownComplete] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeSCTPEmptyLayer), Name: "ShutdownComplete"} + + PPPTypeMetadata[PPPTypeIPv4] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv4), Name: "IPv4"} + PPPTypeMetadata[PPPTypeIPv6] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv6), Name: "IPv6"} + PPPTypeMetadata[PPPTypeMPLSUnicast] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeMPLS), Name: "MPLSUnicast"} + PPPTypeMetadata[PPPTypeMPLSMulticast] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeMPLS), Name: "MPLSMulticast"} + + PPPoECodeMetadata[PPPoECodeSession] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodePPP), Name: "PPP"} + + LinkTypeMetadata[LinkTypeEthernet] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeEthernet), Name: "Ethernet"} + LinkTypeMetadata[LinkTypePPP] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodePPP), Name: "PPP"} + LinkTypeMetadata[LinkTypeFDDI] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeFDDI), Name: "FDDI"} + LinkTypeMetadata[LinkTypeNull] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeLoopback), Name: "Null"} + LinkTypeMetadata[LinkTypeIEEE802_11] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11), Name: "Dot11"} + LinkTypeMetadata[LinkTypeLoop] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeLoopback), Name: "Loop"} + LinkTypeMetadata[LinkTypeIEEE802_11] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11), Name: "802.11"} + LinkTypeMetadata[LinkTypeRaw] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv4or6), Name: "Raw"} + // See https://github.com/the-tcpdump-group/libpcap/blob/170f717e6e818cdc4bcbbfd906b63088eaa88fa0/pcap/dlt.h#L85 + // Or https://github.com/wireshark/wireshark/blob/854cfe53efe44080609c78053ecfb2342ad84a08/wiretap/pcap-common.c#L508 + if runtime.GOOS == "openbsd" { + LinkTypeMetadata[14] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv4or6), Name: "Raw"} + } else { + LinkTypeMetadata[12] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv4or6), Name: "Raw"} + } + LinkTypeMetadata[LinkTypePFLog] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodePFLog), Name: "PFLog"} + LinkTypeMetadata[LinkTypeIEEE80211Radio] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeRadioTap), Name: "RadioTap"} + LinkTypeMetadata[LinkTypeLinuxUSB] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeUSB), Name: "USB"} + LinkTypeMetadata[LinkTypeLinuxSLL] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeLinuxSLL), Name: "Linux SLL"} + LinkTypeMetadata[LinkTypePrismHeader] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodePrismHeader), Name: "Prism"} + + FDDIFrameControlMetadata[FDDIFrameControlLLC] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeLLC), Name: "LLC"} + + EAPOLTypeMetadata[EAPOLTypeEAP] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeEAP), Name: "EAP", LayerType: LayerTypeEAP} + EAPOLTypeMetadata[EAPOLTypeKey] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeEAPOLKey), Name: "EAPOLKey", LayerType: LayerTypeEAPOLKey} + + ProtocolFamilyMetadata[ProtocolFamilyIPv4] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv4), Name: "IPv4", LayerType: LayerTypeIPv4} + ProtocolFamilyMetadata[ProtocolFamilyIPv6BSD] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv6), Name: "IPv6", LayerType: LayerTypeIPv6} + ProtocolFamilyMetadata[ProtocolFamilyIPv6FreeBSD] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv6), Name: "IPv6", LayerType: LayerTypeIPv6} + ProtocolFamilyMetadata[ProtocolFamilyIPv6Darwin] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv6), Name: "IPv6", LayerType: LayerTypeIPv6} + ProtocolFamilyMetadata[ProtocolFamilyIPv6Linux] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeIPv6), Name: "IPv6", LayerType: LayerTypeIPv6} + + Dot11TypeMetadata[Dot11TypeMgmtAssociationReq] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11MgmtAssociationReq), Name: "MgmtAssociationReq", LayerType: LayerTypeDot11MgmtAssociationReq} + Dot11TypeMetadata[Dot11TypeMgmtAssociationResp] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11MgmtAssociationResp), Name: "MgmtAssociationResp", LayerType: LayerTypeDot11MgmtAssociationResp} + Dot11TypeMetadata[Dot11TypeMgmtReassociationReq] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11MgmtReassociationReq), Name: "MgmtReassociationReq", LayerType: LayerTypeDot11MgmtReassociationReq} + Dot11TypeMetadata[Dot11TypeMgmtReassociationResp] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11MgmtReassociationResp), Name: "MgmtReassociationResp", LayerType: LayerTypeDot11MgmtReassociationResp} + Dot11TypeMetadata[Dot11TypeMgmtProbeReq] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11MgmtProbeReq), Name: "MgmtProbeReq", LayerType: LayerTypeDot11MgmtProbeReq} + Dot11TypeMetadata[Dot11TypeMgmtProbeResp] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11MgmtProbeResp), Name: "MgmtProbeResp", LayerType: LayerTypeDot11MgmtProbeResp} + Dot11TypeMetadata[Dot11TypeMgmtMeasurementPilot] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11MgmtMeasurementPilot), Name: "MgmtMeasurementPilot", LayerType: LayerTypeDot11MgmtMeasurementPilot} + Dot11TypeMetadata[Dot11TypeMgmtBeacon] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11MgmtBeacon), Name: "MgmtBeacon", LayerType: LayerTypeDot11MgmtBeacon} + Dot11TypeMetadata[Dot11TypeMgmtATIM] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11MgmtATIM), Name: "MgmtATIM", LayerType: LayerTypeDot11MgmtATIM} + Dot11TypeMetadata[Dot11TypeMgmtDisassociation] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11MgmtDisassociation), Name: "MgmtDisassociation", LayerType: LayerTypeDot11MgmtDisassociation} + Dot11TypeMetadata[Dot11TypeMgmtAuthentication] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11MgmtAuthentication), Name: "MgmtAuthentication", LayerType: LayerTypeDot11MgmtAuthentication} + Dot11TypeMetadata[Dot11TypeMgmtDeauthentication] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11MgmtDeauthentication), Name: "MgmtDeauthentication", LayerType: LayerTypeDot11MgmtDeauthentication} + Dot11TypeMetadata[Dot11TypeMgmtAction] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11MgmtAction), Name: "MgmtAction", LayerType: LayerTypeDot11MgmtAction} + Dot11TypeMetadata[Dot11TypeMgmtActionNoAck] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11MgmtActionNoAck), Name: "MgmtActionNoAck", LayerType: LayerTypeDot11MgmtActionNoAck} + Dot11TypeMetadata[Dot11TypeCtrl] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11Ctrl), Name: "Ctrl", LayerType: LayerTypeDot11Ctrl} + Dot11TypeMetadata[Dot11TypeCtrlWrapper] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11Ctrl), Name: "CtrlWrapper", LayerType: LayerTypeDot11Ctrl} + Dot11TypeMetadata[Dot11TypeCtrlBlockAckReq] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11CtrlBlockAckReq), Name: "CtrlBlockAckReq", LayerType: LayerTypeDot11CtrlBlockAckReq} + Dot11TypeMetadata[Dot11TypeCtrlBlockAck] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11CtrlBlockAck), Name: "CtrlBlockAck", LayerType: LayerTypeDot11CtrlBlockAck} + Dot11TypeMetadata[Dot11TypeCtrlPowersavePoll] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11CtrlPowersavePoll), Name: "CtrlPowersavePoll", LayerType: LayerTypeDot11CtrlPowersavePoll} + Dot11TypeMetadata[Dot11TypeCtrlRTS] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11CtrlRTS), Name: "CtrlRTS", LayerType: LayerTypeDot11CtrlRTS} + Dot11TypeMetadata[Dot11TypeCtrlCTS] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11CtrlCTS), Name: "CtrlCTS", LayerType: LayerTypeDot11CtrlCTS} + Dot11TypeMetadata[Dot11TypeCtrlAck] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11CtrlAck), Name: "CtrlAck", LayerType: LayerTypeDot11CtrlAck} + Dot11TypeMetadata[Dot11TypeCtrlCFEnd] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11CtrlCFEnd), Name: "CtrlCFEnd", LayerType: LayerTypeDot11CtrlCFEnd} + Dot11TypeMetadata[Dot11TypeCtrlCFEndAck] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11CtrlCFEndAck), Name: "CtrlCFEndAck", LayerType: LayerTypeDot11CtrlCFEndAck} + Dot11TypeMetadata[Dot11TypeData] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11Data), Name: "Data", LayerType: LayerTypeDot11Data} + Dot11TypeMetadata[Dot11TypeDataCFAck] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11DataCFAck), Name: "DataCFAck", LayerType: LayerTypeDot11DataCFAck} + Dot11TypeMetadata[Dot11TypeDataCFPoll] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11DataCFPoll), Name: "DataCFPoll", LayerType: LayerTypeDot11DataCFPoll} + Dot11TypeMetadata[Dot11TypeDataCFAckPoll] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11DataCFAckPoll), Name: "DataCFAckPoll", LayerType: LayerTypeDot11DataCFAckPoll} + Dot11TypeMetadata[Dot11TypeDataNull] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11DataNull), Name: "DataNull", LayerType: LayerTypeDot11DataNull} + Dot11TypeMetadata[Dot11TypeDataCFAckNoData] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11DataCFAckNoData), Name: "DataCFAckNoData", LayerType: LayerTypeDot11DataCFAckNoData} + Dot11TypeMetadata[Dot11TypeDataCFPollNoData] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11DataCFPollNoData), Name: "DataCFPollNoData", LayerType: LayerTypeDot11DataCFPollNoData} + Dot11TypeMetadata[Dot11TypeDataCFAckPollNoData] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11DataCFAckPollNoData), Name: "DataCFAckPollNoData", LayerType: LayerTypeDot11DataCFAckPollNoData} + Dot11TypeMetadata[Dot11TypeDataQOSData] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11DataQOSData), Name: "DataQOSData", LayerType: LayerTypeDot11DataQOSData} + Dot11TypeMetadata[Dot11TypeDataQOSDataCFAck] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11DataQOSDataCFAck), Name: "DataQOSDataCFAck", LayerType: LayerTypeDot11DataQOSDataCFAck} + Dot11TypeMetadata[Dot11TypeDataQOSDataCFPoll] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11DataQOSDataCFPoll), Name: "DataQOSDataCFPoll", LayerType: LayerTypeDot11DataQOSDataCFPoll} + Dot11TypeMetadata[Dot11TypeDataQOSDataCFAckPoll] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11DataQOSDataCFAckPoll), Name: "DataQOSDataCFAckPoll", LayerType: LayerTypeDot11DataQOSDataCFAckPoll} + Dot11TypeMetadata[Dot11TypeDataQOSNull] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11DataQOSNull), Name: "DataQOSNull", LayerType: LayerTypeDot11DataQOSNull} + Dot11TypeMetadata[Dot11TypeDataQOSCFPollNoData] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11DataQOSCFPollNoData), Name: "DataQOSCFPollNoData", LayerType: LayerTypeDot11DataQOSCFPollNoData} + Dot11TypeMetadata[Dot11TypeDataQOSCFAckPollNoData] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeDot11DataQOSCFAckPollNoData), Name: "DataQOSCFAckPollNoData", LayerType: LayerTypeDot11DataQOSCFAckPollNoData} + + USBTransportTypeMetadata[USBTransportTypeInterrupt] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeUSBInterrupt), Name: "Interrupt", LayerType: LayerTypeUSBInterrupt} + USBTransportTypeMetadata[USBTransportTypeControl] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeUSBControl), Name: "Control", LayerType: LayerTypeUSBControl} + USBTransportTypeMetadata[USBTransportTypeBulk] = EnumMetadata{DecodeWith: gopacket.DecodeFunc(decodeUSBBulk), Name: "Bulk", LayerType: LayerTypeUSBBulk} +} diff --git a/backend/vendor/github.com/google/gopacket/layers/enums_generated.go b/backend/vendor/github.com/google/gopacket/layers/enums_generated.go new file mode 100644 index 0000000..bf77aac --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/enums_generated.go @@ -0,0 +1,434 @@ +// Copyright 2012 Google, Inc. All rights reserved. + +package layers + +// Created by gen2.go, don't edit manually +// Generated at 2017-10-23 10:20:24.458771856 -0600 MDT m=+0.001159033 + +import ( + "fmt" + + "github.com/google/gopacket" +) + +func init() { + initUnknownTypesForLinkType() + initUnknownTypesForEthernetType() + initUnknownTypesForPPPType() + initUnknownTypesForIPProtocol() + initUnknownTypesForSCTPChunkType() + initUnknownTypesForPPPoECode() + initUnknownTypesForFDDIFrameControl() + initUnknownTypesForEAPOLType() + initUnknownTypesForProtocolFamily() + initUnknownTypesForDot11Type() + initUnknownTypesForUSBTransportType() + initActualTypeData() +} + +// Decoder calls LinkTypeMetadata.DecodeWith's decoder. +func (a LinkType) Decode(data []byte, p gopacket.PacketBuilder) error { + return LinkTypeMetadata[a].DecodeWith.Decode(data, p) +} + +// String returns LinkTypeMetadata.Name. +func (a LinkType) String() string { + return LinkTypeMetadata[a].Name +} + +// LayerType returns LinkTypeMetadata.LayerType. +func (a LinkType) LayerType() gopacket.LayerType { + return LinkTypeMetadata[a].LayerType +} + +type errorDecoderForLinkType int + +func (a *errorDecoderForLinkType) Decode(data []byte, p gopacket.PacketBuilder) error { + return a +} +func (a *errorDecoderForLinkType) Error() string { + return fmt.Sprintf("Unable to decode LinkType %d", int(*a)) +} + +var errorDecodersForLinkType [256]errorDecoderForLinkType +var LinkTypeMetadata [256]EnumMetadata + +func initUnknownTypesForLinkType() { + for i := 0; i < 256; i++ { + errorDecodersForLinkType[i] = errorDecoderForLinkType(i) + LinkTypeMetadata[i] = EnumMetadata{ + DecodeWith: &errorDecodersForLinkType[i], + Name: "UnknownLinkType", + } + } +} + +// Decoder calls EthernetTypeMetadata.DecodeWith's decoder. +func (a EthernetType) Decode(data []byte, p gopacket.PacketBuilder) error { + return EthernetTypeMetadata[a].DecodeWith.Decode(data, p) +} + +// String returns EthernetTypeMetadata.Name. +func (a EthernetType) String() string { + return EthernetTypeMetadata[a].Name +} + +// LayerType returns EthernetTypeMetadata.LayerType. +func (a EthernetType) LayerType() gopacket.LayerType { + return EthernetTypeMetadata[a].LayerType +} + +type errorDecoderForEthernetType int + +func (a *errorDecoderForEthernetType) Decode(data []byte, p gopacket.PacketBuilder) error { + return a +} +func (a *errorDecoderForEthernetType) Error() string { + return fmt.Sprintf("Unable to decode EthernetType %d", int(*a)) +} + +var errorDecodersForEthernetType [65536]errorDecoderForEthernetType +var EthernetTypeMetadata [65536]EnumMetadata + +func initUnknownTypesForEthernetType() { + for i := 0; i < 65536; i++ { + errorDecodersForEthernetType[i] = errorDecoderForEthernetType(i) + EthernetTypeMetadata[i] = EnumMetadata{ + DecodeWith: &errorDecodersForEthernetType[i], + Name: "UnknownEthernetType", + } + } +} + +// Decoder calls PPPTypeMetadata.DecodeWith's decoder. +func (a PPPType) Decode(data []byte, p gopacket.PacketBuilder) error { + return PPPTypeMetadata[a].DecodeWith.Decode(data, p) +} + +// String returns PPPTypeMetadata.Name. +func (a PPPType) String() string { + return PPPTypeMetadata[a].Name +} + +// LayerType returns PPPTypeMetadata.LayerType. +func (a PPPType) LayerType() gopacket.LayerType { + return PPPTypeMetadata[a].LayerType +} + +type errorDecoderForPPPType int + +func (a *errorDecoderForPPPType) Decode(data []byte, p gopacket.PacketBuilder) error { + return a +} +func (a *errorDecoderForPPPType) Error() string { + return fmt.Sprintf("Unable to decode PPPType %d", int(*a)) +} + +var errorDecodersForPPPType [65536]errorDecoderForPPPType +var PPPTypeMetadata [65536]EnumMetadata + +func initUnknownTypesForPPPType() { + for i := 0; i < 65536; i++ { + errorDecodersForPPPType[i] = errorDecoderForPPPType(i) + PPPTypeMetadata[i] = EnumMetadata{ + DecodeWith: &errorDecodersForPPPType[i], + Name: "UnknownPPPType", + } + } +} + +// Decoder calls IPProtocolMetadata.DecodeWith's decoder. +func (a IPProtocol) Decode(data []byte, p gopacket.PacketBuilder) error { + return IPProtocolMetadata[a].DecodeWith.Decode(data, p) +} + +// String returns IPProtocolMetadata.Name. +func (a IPProtocol) String() string { + return IPProtocolMetadata[a].Name +} + +// LayerType returns IPProtocolMetadata.LayerType. +func (a IPProtocol) LayerType() gopacket.LayerType { + return IPProtocolMetadata[a].LayerType +} + +type errorDecoderForIPProtocol int + +func (a *errorDecoderForIPProtocol) Decode(data []byte, p gopacket.PacketBuilder) error { + return a +} +func (a *errorDecoderForIPProtocol) Error() string { + return fmt.Sprintf("Unable to decode IPProtocol %d", int(*a)) +} + +var errorDecodersForIPProtocol [256]errorDecoderForIPProtocol +var IPProtocolMetadata [256]EnumMetadata + +func initUnknownTypesForIPProtocol() { + for i := 0; i < 256; i++ { + errorDecodersForIPProtocol[i] = errorDecoderForIPProtocol(i) + IPProtocolMetadata[i] = EnumMetadata{ + DecodeWith: &errorDecodersForIPProtocol[i], + Name: "UnknownIPProtocol", + } + } +} + +// Decoder calls SCTPChunkTypeMetadata.DecodeWith's decoder. +func (a SCTPChunkType) Decode(data []byte, p gopacket.PacketBuilder) error { + return SCTPChunkTypeMetadata[a].DecodeWith.Decode(data, p) +} + +// String returns SCTPChunkTypeMetadata.Name. +func (a SCTPChunkType) String() string { + return SCTPChunkTypeMetadata[a].Name +} + +// LayerType returns SCTPChunkTypeMetadata.LayerType. +func (a SCTPChunkType) LayerType() gopacket.LayerType { + return SCTPChunkTypeMetadata[a].LayerType +} + +type errorDecoderForSCTPChunkType int + +func (a *errorDecoderForSCTPChunkType) Decode(data []byte, p gopacket.PacketBuilder) error { + return a +} +func (a *errorDecoderForSCTPChunkType) Error() string { + return fmt.Sprintf("Unable to decode SCTPChunkType %d", int(*a)) +} + +var errorDecodersForSCTPChunkType [256]errorDecoderForSCTPChunkType +var SCTPChunkTypeMetadata [256]EnumMetadata + +func initUnknownTypesForSCTPChunkType() { + for i := 0; i < 256; i++ { + errorDecodersForSCTPChunkType[i] = errorDecoderForSCTPChunkType(i) + SCTPChunkTypeMetadata[i] = EnumMetadata{ + DecodeWith: &errorDecodersForSCTPChunkType[i], + Name: "UnknownSCTPChunkType", + } + } +} + +// Decoder calls PPPoECodeMetadata.DecodeWith's decoder. +func (a PPPoECode) Decode(data []byte, p gopacket.PacketBuilder) error { + return PPPoECodeMetadata[a].DecodeWith.Decode(data, p) +} + +// String returns PPPoECodeMetadata.Name. +func (a PPPoECode) String() string { + return PPPoECodeMetadata[a].Name +} + +// LayerType returns PPPoECodeMetadata.LayerType. +func (a PPPoECode) LayerType() gopacket.LayerType { + return PPPoECodeMetadata[a].LayerType +} + +type errorDecoderForPPPoECode int + +func (a *errorDecoderForPPPoECode) Decode(data []byte, p gopacket.PacketBuilder) error { + return a +} +func (a *errorDecoderForPPPoECode) Error() string { + return fmt.Sprintf("Unable to decode PPPoECode %d", int(*a)) +} + +var errorDecodersForPPPoECode [256]errorDecoderForPPPoECode +var PPPoECodeMetadata [256]EnumMetadata + +func initUnknownTypesForPPPoECode() { + for i := 0; i < 256; i++ { + errorDecodersForPPPoECode[i] = errorDecoderForPPPoECode(i) + PPPoECodeMetadata[i] = EnumMetadata{ + DecodeWith: &errorDecodersForPPPoECode[i], + Name: "UnknownPPPoECode", + } + } +} + +// Decoder calls FDDIFrameControlMetadata.DecodeWith's decoder. +func (a FDDIFrameControl) Decode(data []byte, p gopacket.PacketBuilder) error { + return FDDIFrameControlMetadata[a].DecodeWith.Decode(data, p) +} + +// String returns FDDIFrameControlMetadata.Name. +func (a FDDIFrameControl) String() string { + return FDDIFrameControlMetadata[a].Name +} + +// LayerType returns FDDIFrameControlMetadata.LayerType. +func (a FDDIFrameControl) LayerType() gopacket.LayerType { + return FDDIFrameControlMetadata[a].LayerType +} + +type errorDecoderForFDDIFrameControl int + +func (a *errorDecoderForFDDIFrameControl) Decode(data []byte, p gopacket.PacketBuilder) error { + return a +} +func (a *errorDecoderForFDDIFrameControl) Error() string { + return fmt.Sprintf("Unable to decode FDDIFrameControl %d", int(*a)) +} + +var errorDecodersForFDDIFrameControl [256]errorDecoderForFDDIFrameControl +var FDDIFrameControlMetadata [256]EnumMetadata + +func initUnknownTypesForFDDIFrameControl() { + for i := 0; i < 256; i++ { + errorDecodersForFDDIFrameControl[i] = errorDecoderForFDDIFrameControl(i) + FDDIFrameControlMetadata[i] = EnumMetadata{ + DecodeWith: &errorDecodersForFDDIFrameControl[i], + Name: "UnknownFDDIFrameControl", + } + } +} + +// Decoder calls EAPOLTypeMetadata.DecodeWith's decoder. +func (a EAPOLType) Decode(data []byte, p gopacket.PacketBuilder) error { + return EAPOLTypeMetadata[a].DecodeWith.Decode(data, p) +} + +// String returns EAPOLTypeMetadata.Name. +func (a EAPOLType) String() string { + return EAPOLTypeMetadata[a].Name +} + +// LayerType returns EAPOLTypeMetadata.LayerType. +func (a EAPOLType) LayerType() gopacket.LayerType { + return EAPOLTypeMetadata[a].LayerType +} + +type errorDecoderForEAPOLType int + +func (a *errorDecoderForEAPOLType) Decode(data []byte, p gopacket.PacketBuilder) error { + return a +} +func (a *errorDecoderForEAPOLType) Error() string { + return fmt.Sprintf("Unable to decode EAPOLType %d", int(*a)) +} + +var errorDecodersForEAPOLType [256]errorDecoderForEAPOLType +var EAPOLTypeMetadata [256]EnumMetadata + +func initUnknownTypesForEAPOLType() { + for i := 0; i < 256; i++ { + errorDecodersForEAPOLType[i] = errorDecoderForEAPOLType(i) + EAPOLTypeMetadata[i] = EnumMetadata{ + DecodeWith: &errorDecodersForEAPOLType[i], + Name: "UnknownEAPOLType", + } + } +} + +// Decoder calls ProtocolFamilyMetadata.DecodeWith's decoder. +func (a ProtocolFamily) Decode(data []byte, p gopacket.PacketBuilder) error { + return ProtocolFamilyMetadata[a].DecodeWith.Decode(data, p) +} + +// String returns ProtocolFamilyMetadata.Name. +func (a ProtocolFamily) String() string { + return ProtocolFamilyMetadata[a].Name +} + +// LayerType returns ProtocolFamilyMetadata.LayerType. +func (a ProtocolFamily) LayerType() gopacket.LayerType { + return ProtocolFamilyMetadata[a].LayerType +} + +type errorDecoderForProtocolFamily int + +func (a *errorDecoderForProtocolFamily) Decode(data []byte, p gopacket.PacketBuilder) error { + return a +} +func (a *errorDecoderForProtocolFamily) Error() string { + return fmt.Sprintf("Unable to decode ProtocolFamily %d", int(*a)) +} + +var errorDecodersForProtocolFamily [256]errorDecoderForProtocolFamily +var ProtocolFamilyMetadata [256]EnumMetadata + +func initUnknownTypesForProtocolFamily() { + for i := 0; i < 256; i++ { + errorDecodersForProtocolFamily[i] = errorDecoderForProtocolFamily(i) + ProtocolFamilyMetadata[i] = EnumMetadata{ + DecodeWith: &errorDecodersForProtocolFamily[i], + Name: "UnknownProtocolFamily", + } + } +} + +// Decoder calls Dot11TypeMetadata.DecodeWith's decoder. +func (a Dot11Type) Decode(data []byte, p gopacket.PacketBuilder) error { + return Dot11TypeMetadata[a].DecodeWith.Decode(data, p) +} + +// String returns Dot11TypeMetadata.Name. +func (a Dot11Type) String() string { + return Dot11TypeMetadata[a].Name +} + +// LayerType returns Dot11TypeMetadata.LayerType. +func (a Dot11Type) LayerType() gopacket.LayerType { + return Dot11TypeMetadata[a].LayerType +} + +type errorDecoderForDot11Type int + +func (a *errorDecoderForDot11Type) Decode(data []byte, p gopacket.PacketBuilder) error { + return a +} +func (a *errorDecoderForDot11Type) Error() string { + return fmt.Sprintf("Unable to decode Dot11Type %d", int(*a)) +} + +var errorDecodersForDot11Type [256]errorDecoderForDot11Type +var Dot11TypeMetadata [256]EnumMetadata + +func initUnknownTypesForDot11Type() { + for i := 0; i < 256; i++ { + errorDecodersForDot11Type[i] = errorDecoderForDot11Type(i) + Dot11TypeMetadata[i] = EnumMetadata{ + DecodeWith: &errorDecodersForDot11Type[i], + Name: "UnknownDot11Type", + } + } +} + +// Decoder calls USBTransportTypeMetadata.DecodeWith's decoder. +func (a USBTransportType) Decode(data []byte, p gopacket.PacketBuilder) error { + return USBTransportTypeMetadata[a].DecodeWith.Decode(data, p) +} + +// String returns USBTransportTypeMetadata.Name. +func (a USBTransportType) String() string { + return USBTransportTypeMetadata[a].Name +} + +// LayerType returns USBTransportTypeMetadata.LayerType. +func (a USBTransportType) LayerType() gopacket.LayerType { + return USBTransportTypeMetadata[a].LayerType +} + +type errorDecoderForUSBTransportType int + +func (a *errorDecoderForUSBTransportType) Decode(data []byte, p gopacket.PacketBuilder) error { + return a +} +func (a *errorDecoderForUSBTransportType) Error() string { + return fmt.Sprintf("Unable to decode USBTransportType %d", int(*a)) +} + +var errorDecodersForUSBTransportType [256]errorDecoderForUSBTransportType +var USBTransportTypeMetadata [256]EnumMetadata + +func initUnknownTypesForUSBTransportType() { + for i := 0; i < 256; i++ { + errorDecodersForUSBTransportType[i] = errorDecoderForUSBTransportType(i) + USBTransportTypeMetadata[i] = EnumMetadata{ + DecodeWith: &errorDecodersForUSBTransportType[i], + Name: "UnknownUSBTransportType", + } + } +} diff --git a/backend/vendor/github.com/google/gopacket/layers/erspan2.go b/backend/vendor/github.com/google/gopacket/layers/erspan2.go new file mode 100644 index 0000000..1544362 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/erspan2.go @@ -0,0 +1,86 @@ +// Copyright 2018 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + + "github.com/google/gopacket" +) + +const ( + //ERSPANIIVersionObsolete - The obsolete value for the version field + ERSPANIIVersionObsolete = 0x0 + // ERSPANIIVersion - The current value for the version field + ERSPANIIVersion = 0x1 +) + +// ERSPANII contains all of the fields found in an ERSPAN Type II header +// https://tools.ietf.org/html/draft-foschiano-erspan-03 +type ERSPANII struct { + BaseLayer + IsTruncated bool + Version, CoS, TrunkEncap uint8 + VLANIdentifier, SessionID, Reserved uint16 + Index uint32 +} + +func (erspan2 *ERSPANII) LayerType() gopacket.LayerType { return LayerTypeERSPANII } + +// DecodeFromBytes decodes the given bytes into this layer. +func (erspan2 *ERSPANII) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + erspan2Length := 8 + erspan2.Version = data[0] & 0xF0 >> 4 + erspan2.VLANIdentifier = binary.BigEndian.Uint16(data[:2]) & 0x0FFF + erspan2.CoS = data[2] & 0xE0 >> 5 + erspan2.TrunkEncap = data[2] & 0x18 >> 3 + erspan2.IsTruncated = data[2]&0x4>>2 != 0 + erspan2.SessionID = binary.BigEndian.Uint16(data[2:4]) & 0x03FF + erspan2.Reserved = binary.BigEndian.Uint16(data[4:6]) & 0xFFF0 >> 4 + erspan2.Index = binary.BigEndian.Uint32(data[4:8]) & 0x000FFFFF + erspan2.Contents = data[:erspan2Length] + erspan2.Payload = data[erspan2Length:] + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (erspan2 *ERSPANII) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + bytes, err := b.PrependBytes(8) + if err != nil { + return err + } + + twoByteInt := uint16(erspan2.Version&0xF)<<12 | erspan2.VLANIdentifier&0x0FFF + binary.BigEndian.PutUint16(bytes, twoByteInt) + + twoByteInt = uint16(erspan2.CoS&0x7)<<13 | uint16(erspan2.TrunkEncap&0x3)<<11 | erspan2.SessionID&0x03FF + if erspan2.IsTruncated { + twoByteInt |= 0x400 + } + binary.BigEndian.PutUint16(bytes[2:], twoByteInt) + + fourByteInt := uint32(erspan2.Reserved&0x0FFF)<<20 | erspan2.Index&0x000FFFFF + binary.BigEndian.PutUint32(bytes[4:], fourByteInt) + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (erspan2 *ERSPANII) CanDecode() gopacket.LayerClass { + return LayerTypeERSPANII +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (erspan2 *ERSPANII) NextLayerType() gopacket.LayerType { + return LayerTypeEthernet +} + +func decodeERSPANII(data []byte, p gopacket.PacketBuilder) error { + erspan2 := &ERSPANII{} + return decodingLayerDecoder(erspan2, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/etherip.go b/backend/vendor/github.com/google/gopacket/layers/etherip.go new file mode 100644 index 0000000..5b7b722 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/etherip.go @@ -0,0 +1,45 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "github.com/google/gopacket" +) + +// EtherIP is the struct for storing RFC 3378 EtherIP packet headers. +type EtherIP struct { + BaseLayer + Version uint8 + Reserved uint16 +} + +// LayerType returns gopacket.LayerTypeEtherIP. +func (e *EtherIP) LayerType() gopacket.LayerType { return LayerTypeEtherIP } + +// DecodeFromBytes decodes the given bytes into this layer. +func (e *EtherIP) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + e.Version = data[0] >> 4 + e.Reserved = binary.BigEndian.Uint16(data[:2]) & 0x0fff + e.BaseLayer = BaseLayer{data[:2], data[2:]} + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (e *EtherIP) CanDecode() gopacket.LayerClass { + return LayerTypeEtherIP +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (e *EtherIP) NextLayerType() gopacket.LayerType { + return LayerTypeEthernet +} + +func decodeEtherIP(data []byte, p gopacket.PacketBuilder) error { + e := &EtherIP{} + return decodingLayerDecoder(e, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/ethernet.go b/backend/vendor/github.com/google/gopacket/layers/ethernet.go new file mode 100644 index 0000000..b73748f --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/ethernet.go @@ -0,0 +1,123 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// Copyright 2009-2011 Andreas Krennmair. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + "github.com/google/gopacket" + "net" +) + +// EthernetBroadcast is the broadcast MAC address used by Ethernet. +var EthernetBroadcast = net.HardwareAddr{0xff, 0xff, 0xff, 0xff, 0xff, 0xff} + +// Ethernet is the layer for Ethernet frame headers. +type Ethernet struct { + BaseLayer + SrcMAC, DstMAC net.HardwareAddr + EthernetType EthernetType + // Length is only set if a length field exists within this header. Ethernet + // headers follow two different standards, one that uses an EthernetType, the + // other which defines a length the follows with a LLC header (802.3). If the + // former is the case, we set EthernetType and Length stays 0. In the latter + // case, we set Length and EthernetType = EthernetTypeLLC. + Length uint16 +} + +// LayerType returns LayerTypeEthernet +func (e *Ethernet) LayerType() gopacket.LayerType { return LayerTypeEthernet } + +func (e *Ethernet) LinkFlow() gopacket.Flow { + return gopacket.NewFlow(EndpointMAC, e.SrcMAC, e.DstMAC) +} + +func (eth *Ethernet) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 14 { + return errors.New("Ethernet packet too small") + } + eth.DstMAC = net.HardwareAddr(data[0:6]) + eth.SrcMAC = net.HardwareAddr(data[6:12]) + eth.EthernetType = EthernetType(binary.BigEndian.Uint16(data[12:14])) + eth.BaseLayer = BaseLayer{data[:14], data[14:]} + eth.Length = 0 + if eth.EthernetType < 0x0600 { + eth.Length = uint16(eth.EthernetType) + eth.EthernetType = EthernetTypeLLC + if cmp := len(eth.Payload) - int(eth.Length); cmp < 0 { + df.SetTruncated() + } else if cmp > 0 { + // Strip off bytes at the end, since we have too many bytes + eth.Payload = eth.Payload[:len(eth.Payload)-cmp] + } + // fmt.Println(eth) + } + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (eth *Ethernet) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + if len(eth.DstMAC) != 6 { + return fmt.Errorf("invalid dst MAC: %v", eth.DstMAC) + } + if len(eth.SrcMAC) != 6 { + return fmt.Errorf("invalid src MAC: %v", eth.SrcMAC) + } + payload := b.Bytes() + bytes, err := b.PrependBytes(14) + if err != nil { + return err + } + copy(bytes, eth.DstMAC) + copy(bytes[6:], eth.SrcMAC) + if eth.Length != 0 || eth.EthernetType == EthernetTypeLLC { + if opts.FixLengths { + eth.Length = uint16(len(payload)) + } + if eth.EthernetType != EthernetTypeLLC { + return fmt.Errorf("ethernet type %v not compatible with length value %v", eth.EthernetType, eth.Length) + } else if eth.Length > 0x0600 { + return fmt.Errorf("invalid ethernet length %v", eth.Length) + } + binary.BigEndian.PutUint16(bytes[12:], eth.Length) + } else { + binary.BigEndian.PutUint16(bytes[12:], uint16(eth.EthernetType)) + } + length := len(b.Bytes()) + if length < 60 { + // Pad out to 60 bytes. + padding, err := b.AppendBytes(60 - length) + if err != nil { + return err + } + copy(padding, lotsOfZeros[:]) + } + return nil +} + +func (eth *Ethernet) CanDecode() gopacket.LayerClass { + return LayerTypeEthernet +} + +func (eth *Ethernet) NextLayerType() gopacket.LayerType { + return eth.EthernetType.LayerType() +} + +func decodeEthernet(data []byte, p gopacket.PacketBuilder) error { + eth := &Ethernet{} + err := eth.DecodeFromBytes(data, p) + if err != nil { + return err + } + p.AddLayer(eth) + p.SetLinkLayer(eth) + return p.NextDecoder(eth.EthernetType) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/fddi.go b/backend/vendor/github.com/google/gopacket/layers/fddi.go new file mode 100644 index 0000000..ed9e195 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/fddi.go @@ -0,0 +1,41 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "github.com/google/gopacket" + "net" +) + +// FDDI contains the header for FDDI frames. +type FDDI struct { + BaseLayer + FrameControl FDDIFrameControl + Priority uint8 + SrcMAC, DstMAC net.HardwareAddr +} + +// LayerType returns LayerTypeFDDI. +func (f *FDDI) LayerType() gopacket.LayerType { return LayerTypeFDDI } + +// LinkFlow returns a new flow of type EndpointMAC. +func (f *FDDI) LinkFlow() gopacket.Flow { + return gopacket.NewFlow(EndpointMAC, f.SrcMAC, f.DstMAC) +} + +func decodeFDDI(data []byte, p gopacket.PacketBuilder) error { + f := &FDDI{ + FrameControl: FDDIFrameControl(data[0] & 0xF8), + Priority: data[0] & 0x07, + SrcMAC: net.HardwareAddr(data[1:7]), + DstMAC: net.HardwareAddr(data[7:13]), + BaseLayer: BaseLayer{data[:13], data[13:]}, + } + p.SetLinkLayer(f) + p.AddLayer(f) + return p.NextDecoder(f.FrameControl) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/fuzz_layer.go b/backend/vendor/github.com/google/gopacket/layers/fuzz_layer.go new file mode 100644 index 0000000..606e45d --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/fuzz_layer.go @@ -0,0 +1,39 @@ +// Copyright 2019 The GoPacket Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style license that can be found +// in the LICENSE file in the root of the source tree. + +package layers + +import ( + "encoding/binary" + + "github.com/google/gopacket" +) + +// FuzzLayer is a fuzz target for the layers package of gopacket +// A fuzz target is a function processing a binary blob (byte slice) +// The process here is to interpret this data as a packet, and print the layers contents. +// The decoding options and the starting layer are encoded in the first bytes. +// The function returns 1 if this is a valid packet (no error layer) +func FuzzLayer(data []byte) int { + if len(data) < 3 { + return 0 + } + // use the first two bytes to choose the top level layer + startLayer := binary.BigEndian.Uint16(data[:2]) + var fuzzOpts = gopacket.DecodeOptions{ + Lazy: data[2]&0x1 != 0, + NoCopy: data[2]&0x2 != 0, + SkipDecodeRecovery: data[2]&0x4 != 0, + DecodeStreamsAsDatagrams: data[2]&0x8 != 0, + } + p := gopacket.NewPacket(data[3:], gopacket.LayerType(startLayer), fuzzOpts) + for _, l := range p.Layers() { + gopacket.LayerString(l) + } + if p.ErrorLayer() != nil { + return 0 + } + return 1 +} diff --git a/backend/vendor/github.com/google/gopacket/layers/gen_linted.sh b/backend/vendor/github.com/google/gopacket/layers/gen_linted.sh new file mode 100644 index 0000000..75c701f --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/gen_linted.sh @@ -0,0 +1,3 @@ +#!/bin/bash + +for i in *.go; do golint $i | grep -q . || echo $i; done > .linted diff --git a/backend/vendor/github.com/google/gopacket/layers/geneve.go b/backend/vendor/github.com/google/gopacket/layers/geneve.go new file mode 100644 index 0000000..e9a1428 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/geneve.go @@ -0,0 +1,121 @@ +// Copyright 2016 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + + "github.com/google/gopacket" +) + +// Geneve is specifed here https://tools.ietf.org/html/draft-ietf-nvo3-geneve-03 +// Geneve Header: +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// |Ver| Opt Len |O|C| Rsvd. | Protocol Type | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Virtual Network Identifier (VNI) | Reserved | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Variable Length Options | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +type Geneve struct { + BaseLayer + Version uint8 // 2 bits + OptionsLength uint8 // 6 bits + OAMPacket bool // 1 bits + CriticalOption bool // 1 bits + Protocol EthernetType // 16 bits + VNI uint32 // 24bits + Options []*GeneveOption +} + +// Geneve Tunnel Options +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Option Class | Type |R|R|R| Length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Variable Option Data | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +type GeneveOption struct { + Class uint16 // 16 bits + Type uint8 // 8 bits + Flags uint8 // 3 bits + Length uint8 // 5 bits + Data []byte +} + +// LayerType returns LayerTypeGeneve +func (gn *Geneve) LayerType() gopacket.LayerType { return LayerTypeGeneve } + +func decodeGeneveOption(data []byte, gn *Geneve, df gopacket.DecodeFeedback) (*GeneveOption, uint8, error) { + if len(data) < 3 { + df.SetTruncated() + return nil, 0, errors.New("geneve option too small") + } + opt := &GeneveOption{} + + opt.Class = binary.BigEndian.Uint16(data[0:2]) + opt.Type = data[2] + opt.Flags = data[3] >> 4 + opt.Length = (data[3]&0xf)*4 + 4 + + if len(data) < int(opt.Length) { + df.SetTruncated() + return nil, 0, errors.New("geneve option too small") + } + opt.Data = make([]byte, opt.Length-4) + copy(opt.Data, data[4:opt.Length]) + + return opt, opt.Length, nil +} + +func (gn *Geneve) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 7 { + df.SetTruncated() + return errors.New("geneve packet too short") + } + + gn.Version = data[0] >> 7 + gn.OptionsLength = (data[0] & 0x3f) * 4 + + gn.OAMPacket = data[1]&0x80 > 0 + gn.CriticalOption = data[1]&0x40 > 0 + gn.Protocol = EthernetType(binary.BigEndian.Uint16(data[2:4])) + + var buf [4]byte + copy(buf[1:], data[4:7]) + gn.VNI = binary.BigEndian.Uint32(buf[:]) + + offset, length := uint8(8), int32(gn.OptionsLength) + if len(data) < int(length+7) { + df.SetTruncated() + return errors.New("geneve packet too short") + } + + for length > 0 { + opt, len, err := decodeGeneveOption(data[offset:], gn, df) + if err != nil { + return err + } + gn.Options = append(gn.Options, opt) + + length -= int32(len) + offset += len + } + + gn.BaseLayer = BaseLayer{data[:offset], data[offset:]} + + return nil +} + +func (gn *Geneve) NextLayerType() gopacket.LayerType { + return gn.Protocol.LayerType() +} + +func decodeGeneve(data []byte, p gopacket.PacketBuilder) error { + gn := &Geneve{} + return decodingLayerDecoder(gn, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/gre.go b/backend/vendor/github.com/google/gopacket/layers/gre.go new file mode 100644 index 0000000..9c5e7d2 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/gre.go @@ -0,0 +1,200 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + + "github.com/google/gopacket" +) + +// GRE is a Generic Routing Encapsulation header. +type GRE struct { + BaseLayer + ChecksumPresent, RoutingPresent, KeyPresent, SeqPresent, StrictSourceRoute, AckPresent bool + RecursionControl, Flags, Version uint8 + Protocol EthernetType + Checksum, Offset uint16 + Key, Seq, Ack uint32 + *GRERouting +} + +// GRERouting is GRE routing information, present if the RoutingPresent flag is +// set. +type GRERouting struct { + AddressFamily uint16 + SREOffset, SRELength uint8 + RoutingInformation []byte + Next *GRERouting +} + +// LayerType returns gopacket.LayerTypeGRE. +func (g *GRE) LayerType() gopacket.LayerType { return LayerTypeGRE } + +// DecodeFromBytes decodes the given bytes into this layer. +func (g *GRE) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + g.ChecksumPresent = data[0]&0x80 != 0 + g.RoutingPresent = data[0]&0x40 != 0 + g.KeyPresent = data[0]&0x20 != 0 + g.SeqPresent = data[0]&0x10 != 0 + g.StrictSourceRoute = data[0]&0x08 != 0 + g.AckPresent = data[1]&0x80 != 0 + g.RecursionControl = data[0] & 0x7 + g.Flags = data[1] >> 3 + g.Version = data[1] & 0x7 + g.Protocol = EthernetType(binary.BigEndian.Uint16(data[2:4])) + offset := 4 + if g.ChecksumPresent || g.RoutingPresent { + g.Checksum = binary.BigEndian.Uint16(data[offset : offset+2]) + g.Offset = binary.BigEndian.Uint16(data[offset+2 : offset+4]) + offset += 4 + } + if g.KeyPresent { + g.Key = binary.BigEndian.Uint32(data[offset : offset+4]) + offset += 4 + } + if g.SeqPresent { + g.Seq = binary.BigEndian.Uint32(data[offset : offset+4]) + offset += 4 + } + if g.RoutingPresent { + tail := &g.GRERouting + for { + sre := &GRERouting{ + AddressFamily: binary.BigEndian.Uint16(data[offset : offset+2]), + SREOffset: data[offset+2], + SRELength: data[offset+3], + } + sre.RoutingInformation = data[offset+4 : offset+4+int(sre.SRELength)] + offset += 4 + int(sre.SRELength) + if sre.AddressFamily == 0 && sre.SRELength == 0 { + break + } + (*tail) = sre + tail = &sre.Next + } + } + if g.AckPresent { + g.Ack = binary.BigEndian.Uint32(data[offset : offset+4]) + offset += 4 + } + g.BaseLayer = BaseLayer{data[:offset], data[offset:]} + return nil +} + +// SerializeTo writes the serialized form of this layer into the SerializationBuffer, +// implementing gopacket.SerializableLayer. See the docs for gopacket.SerializableLayer for more info. +func (g *GRE) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + size := 4 + if g.ChecksumPresent || g.RoutingPresent { + size += 4 + } + if g.KeyPresent { + size += 4 + } + if g.SeqPresent { + size += 4 + } + if g.RoutingPresent { + r := g.GRERouting + for r != nil { + size += 4 + int(r.SRELength) + r = r.Next + } + size += 4 + } + if g.AckPresent { + size += 4 + } + buf, err := b.PrependBytes(size) + if err != nil { + return err + } + // Reset any potentially dirty memory in the first 2 bytes, as these use OR to set flags. + buf[0] = 0 + buf[1] = 0 + if g.ChecksumPresent { + buf[0] |= 0x80 + } + if g.RoutingPresent { + buf[0] |= 0x40 + } + if g.KeyPresent { + buf[0] |= 0x20 + } + if g.SeqPresent { + buf[0] |= 0x10 + } + if g.StrictSourceRoute { + buf[0] |= 0x08 + } + if g.AckPresent { + buf[1] |= 0x80 + } + buf[0] |= g.RecursionControl + buf[1] |= g.Flags << 3 + buf[1] |= g.Version + binary.BigEndian.PutUint16(buf[2:4], uint16(g.Protocol)) + offset := 4 + if g.ChecksumPresent || g.RoutingPresent { + // Don't write the checksum value yet, as we may need to compute it, + // which requires the entire header be complete. + // Instead we zeroize the memory in case it is dirty. + buf[offset] = 0 + buf[offset+1] = 0 + binary.BigEndian.PutUint16(buf[offset+2:offset+4], g.Offset) + offset += 4 + } + if g.KeyPresent { + binary.BigEndian.PutUint32(buf[offset:offset+4], g.Key) + offset += 4 + } + if g.SeqPresent { + binary.BigEndian.PutUint32(buf[offset:offset+4], g.Seq) + offset += 4 + } + if g.RoutingPresent { + sre := g.GRERouting + for sre != nil { + binary.BigEndian.PutUint16(buf[offset:offset+2], sre.AddressFamily) + buf[offset+2] = sre.SREOffset + buf[offset+3] = sre.SRELength + copy(buf[offset+4:offset+4+int(sre.SRELength)], sre.RoutingInformation) + offset += 4 + int(sre.SRELength) + sre = sre.Next + } + // Terminate routing field with a "NULL" SRE. + binary.BigEndian.PutUint32(buf[offset:offset+4], 0) + } + if g.AckPresent { + binary.BigEndian.PutUint32(buf[offset:offset+4], g.Ack) + offset += 4 + } + if g.ChecksumPresent { + if opts.ComputeChecksums { + g.Checksum = tcpipChecksum(b.Bytes(), 0) + } + + binary.BigEndian.PutUint16(buf[4:6], g.Checksum) + } + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (g *GRE) CanDecode() gopacket.LayerClass { + return LayerTypeGRE +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (g *GRE) NextLayerType() gopacket.LayerType { + return g.Protocol.LayerType() +} + +func decodeGRE(data []byte, p gopacket.PacketBuilder) error { + g := &GRE{} + return decodingLayerDecoder(g, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/gtp.go b/backend/vendor/github.com/google/gopacket/layers/gtp.go new file mode 100644 index 0000000..fe3054a --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/gtp.go @@ -0,0 +1,184 @@ +// Copyright 2017 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. +// + +package layers + +import ( + "encoding/binary" + "fmt" + "github.com/google/gopacket" +) + +const gtpMinimumSizeInBytes int = 8 + +// GTPExtensionHeader is used to carry extra data and enable future extensions of the GTP without the need to use another version number. +type GTPExtensionHeader struct { + Type uint8 + Content []byte +} + +// GTPv1U protocol is used to exchange user data over GTP tunnels across the Sx interfaces. +// Defined in https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1595 +type GTPv1U struct { + BaseLayer + Version uint8 + ProtocolType uint8 + Reserved uint8 + ExtensionHeaderFlag bool + SequenceNumberFlag bool + NPDUFlag bool + MessageType uint8 + MessageLength uint16 + TEID uint32 + SequenceNumber uint16 + NPDU uint8 + GTPExtensionHeaders []GTPExtensionHeader +} + +// LayerType returns LayerTypeGTPV1U +func (g *GTPv1U) LayerType() gopacket.LayerType { return LayerTypeGTPv1U } + +// DecodeFromBytes analyses a byte slice and attempts to decode it as a GTPv1U packet +func (g *GTPv1U) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + hLen := gtpMinimumSizeInBytes + dLen := len(data) + if dLen < hLen { + return fmt.Errorf("GTP packet too small: %d bytes", dLen) + } + g.Version = (data[0] >> 5) & 0x07 + g.ProtocolType = (data[0] >> 4) & 0x01 + g.Reserved = (data[0] >> 3) & 0x01 + g.SequenceNumberFlag = ((data[0] >> 1) & 0x01) == 1 + g.NPDUFlag = (data[0] & 0x01) == 1 + g.ExtensionHeaderFlag = ((data[0] >> 2) & 0x01) == 1 + g.MessageType = data[1] + g.MessageLength = binary.BigEndian.Uint16(data[2:4]) + pLen := 8 + g.MessageLength + if uint16(dLen) < pLen { + return fmt.Errorf("GTP packet too small: %d bytes", dLen) + } + // Field used to multiplex different connections in the same GTP tunnel. + g.TEID = binary.BigEndian.Uint32(data[4:8]) + cIndex := uint16(hLen) + if g.SequenceNumberFlag || g.NPDUFlag || g.ExtensionHeaderFlag { + hLen += 4 + cIndex += 4 + if dLen < hLen { + return fmt.Errorf("GTP packet too small: %d bytes", dLen) + } + if g.SequenceNumberFlag { + g.SequenceNumber = binary.BigEndian.Uint16(data[8:10]) + } + if g.NPDUFlag { + g.NPDU = data[10] + } + if g.ExtensionHeaderFlag { + extensionFlag := true + for extensionFlag { + extensionType := uint8(data[cIndex-1]) + extensionLength := uint(data[cIndex]) + if extensionLength == 0 { + return fmt.Errorf("GTP packet with invalid extension header") + } + // extensionLength is in 4-octet units + lIndex := cIndex + (uint16(extensionLength) * 4) + if uint16(dLen) < lIndex { + fmt.Println(dLen, lIndex) + return fmt.Errorf("GTP packet with small extension header: %d bytes", dLen) + } + content := data[cIndex+1 : lIndex-1] + eh := GTPExtensionHeader{Type: extensionType, Content: content} + g.GTPExtensionHeaders = append(g.GTPExtensionHeaders, eh) + cIndex = lIndex + // Check if coming bytes are from an extension header + extensionFlag = data[cIndex-1] != 0 + + } + } + } + g.BaseLayer = BaseLayer{Contents: data[:cIndex], Payload: data[cIndex:]} + return nil + +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (g *GTPv1U) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + data, err := b.PrependBytes(gtpMinimumSizeInBytes) + if err != nil { + return err + } + data[0] |= (g.Version << 5) + data[0] |= (1 << 4) + if len(g.GTPExtensionHeaders) > 0 { + data[0] |= 0x04 + g.ExtensionHeaderFlag = true + } + if g.SequenceNumberFlag { + data[0] |= 0x02 + } + if g.NPDUFlag { + data[0] |= 0x01 + } + data[1] = g.MessageType + binary.BigEndian.PutUint16(data[2:4], g.MessageLength) + binary.BigEndian.PutUint32(data[4:8], g.TEID) + if g.ExtensionHeaderFlag || g.SequenceNumberFlag || g.NPDUFlag { + data, err := b.AppendBytes(4) + if err != nil { + return err + } + binary.BigEndian.PutUint16(data[:2], g.SequenceNumber) + data[2] = g.NPDU + for _, eh := range g.GTPExtensionHeaders { + data[len(data)-1] = eh.Type + lContent := len(eh.Content) + // extensionLength is in 4-octet units + extensionLength := (lContent + 2) / 4 + // Get two extra byte for the next extension header type and length + data, err = b.AppendBytes(lContent + 2) + if err != nil { + return err + } + data[0] = byte(extensionLength) + copy(data[1:lContent+1], eh.Content) + } + } + return nil + +} + +// CanDecode returns a set of layers that GTP objects can decode. +func (g *GTPv1U) CanDecode() gopacket.LayerClass { + return LayerTypeGTPv1U +} + +// NextLayerType specifies the next layer that GoPacket should attempt to +func (g *GTPv1U) NextLayerType() gopacket.LayerType { + if len(g.LayerPayload()) == 0 { + return gopacket.LayerTypeZero + } + version := uint8(g.LayerPayload()[0]) >> 4 + if version == 4 { + return LayerTypeIPv4 + } else if version == 6 { + return LayerTypeIPv6 + } else { + return LayerTypePPP + } +} + +func decodeGTPv1u(data []byte, p gopacket.PacketBuilder) error { + gtp := >Pv1U{} + err := gtp.DecodeFromBytes(data, p) + if err != nil { + return err + } + p.AddLayer(gtp) + return p.NextDecoder(gtp.NextLayerType()) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/iana_ports.go b/backend/vendor/github.com/google/gopacket/layers/iana_ports.go new file mode 100644 index 0000000..ddcf3ec --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/iana_ports.go @@ -0,0 +1,11351 @@ +// Copyright 2012 Google, Inc. All rights reserved. + +package layers + +// Created by gen.go, don't edit manually +// Generated at 2017-10-23 09:57:28.214859163 -0600 MDT m=+1.011679290 +// Fetched from "http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xml" + +// TCPPortNames contains the port names for all TCP ports. +var TCPPortNames = tcpPortNames + +// UDPPortNames contains the port names for all UDP ports. +var UDPPortNames = udpPortNames + +// SCTPPortNames contains the port names for all SCTP ports. +var SCTPPortNames = sctpPortNames + +var tcpPortNames = map[TCPPort]string{ + 1: "tcpmux", + 2: "compressnet", + 3: "compressnet", + 5: "rje", + 7: "echo", + 9: "discard", + 11: "systat", + 13: "daytime", + 17: "qotd", + 18: "msp", + 19: "chargen", + 20: "ftp-data", + 21: "ftp", + 22: "ssh", + 23: "telnet", + 25: "smtp", + 27: "nsw-fe", + 29: "msg-icp", + 31: "msg-auth", + 33: "dsp", + 37: "time", + 38: "rap", + 39: "rlp", + 41: "graphics", + 42: "name", + 43: "nicname", + 44: "mpm-flags", + 45: "mpm", + 46: "mpm-snd", + 48: "auditd", + 49: "tacacs", + 50: "re-mail-ck", + 52: "xns-time", + 53: "domain", + 54: "xns-ch", + 55: "isi-gl", + 56: "xns-auth", + 58: "xns-mail", + 62: "acas", + 63: "whoispp", + 64: "covia", + 65: "tacacs-ds", + 66: "sql-net", + 67: "bootps", + 68: "bootpc", + 69: "tftp", + 70: "gopher", + 71: "netrjs-1", + 72: "netrjs-2", + 73: "netrjs-3", + 74: "netrjs-4", + 76: "deos", + 78: "vettcp", + 79: "finger", + 80: "http", + 82: "xfer", + 83: "mit-ml-dev", + 84: "ctf", + 85: "mit-ml-dev", + 86: "mfcobol", + 88: "kerberos", + 89: "su-mit-tg", + 90: "dnsix", + 91: "mit-dov", + 92: "npp", + 93: "dcp", + 94: "objcall", + 95: "supdup", + 96: "dixie", + 97: "swift-rvf", + 98: "tacnews", + 99: "metagram", + 101: "hostname", + 102: "iso-tsap", + 103: "gppitnp", + 104: "acr-nema", + 105: "cso", + 106: "3com-tsmux", + 107: "rtelnet", + 108: "snagas", + 109: "pop2", + 110: "pop3", + 111: "sunrpc", + 112: "mcidas", + 113: "ident", + 115: "sftp", + 116: "ansanotify", + 117: "uucp-path", + 118: "sqlserv", + 119: "nntp", + 120: "cfdptkt", + 121: "erpc", + 122: "smakynet", + 123: "ntp", + 124: "ansatrader", + 125: "locus-map", + 126: "nxedit", + 127: "locus-con", + 128: "gss-xlicen", + 129: "pwdgen", + 130: "cisco-fna", + 131: "cisco-tna", + 132: "cisco-sys", + 133: "statsrv", + 134: "ingres-net", + 135: "epmap", + 136: "profile", + 137: "netbios-ns", + 138: "netbios-dgm", + 139: "netbios-ssn", + 140: "emfis-data", + 141: "emfis-cntl", + 142: "bl-idm", + 143: "imap", + 144: "uma", + 145: "uaac", + 146: "iso-tp0", + 147: "iso-ip", + 148: "jargon", + 149: "aed-512", + 150: "sql-net", + 151: "hems", + 152: "bftp", + 153: "sgmp", + 154: "netsc-prod", + 155: "netsc-dev", + 156: "sqlsrv", + 157: "knet-cmp", + 158: "pcmail-srv", + 159: "nss-routing", + 160: "sgmp-traps", + 161: "snmp", + 162: "snmptrap", + 163: "cmip-man", + 164: "cmip-agent", + 165: "xns-courier", + 166: "s-net", + 167: "namp", + 168: "rsvd", + 169: "send", + 170: "print-srv", + 171: "multiplex", + 172: "cl-1", + 173: "xyplex-mux", + 174: "mailq", + 175: "vmnet", + 176: "genrad-mux", + 177: "xdmcp", + 178: "nextstep", + 179: "bgp", + 180: "ris", + 181: "unify", + 182: "audit", + 183: "ocbinder", + 184: "ocserver", + 185: "remote-kis", + 186: "kis", + 187: "aci", + 188: "mumps", + 189: "qft", + 190: "gacp", + 191: "prospero", + 192: "osu-nms", + 193: "srmp", + 194: "irc", + 195: "dn6-nlm-aud", + 196: "dn6-smm-red", + 197: "dls", + 198: "dls-mon", + 199: "smux", + 200: "src", + 201: "at-rtmp", + 202: "at-nbp", + 203: "at-3", + 204: "at-echo", + 205: "at-5", + 206: "at-zis", + 207: "at-7", + 208: "at-8", + 209: "qmtp", + 210: "z39-50", + 211: "914c-g", + 212: "anet", + 213: "ipx", + 214: "vmpwscs", + 215: "softpc", + 216: "CAIlic", + 217: "dbase", + 218: "mpp", + 219: "uarps", + 220: "imap3", + 221: "fln-spx", + 222: "rsh-spx", + 223: "cdc", + 224: "masqdialer", + 242: "direct", + 243: "sur-meas", + 244: "inbusiness", + 245: "link", + 246: "dsp3270", + 247: "subntbcst-tftp", + 248: "bhfhs", + 256: "rap", + 257: "set", + 259: "esro-gen", + 260: "openport", + 261: "nsiiops", + 262: "arcisdms", + 263: "hdap", + 264: "bgmp", + 265: "x-bone-ctl", + 266: "sst", + 267: "td-service", + 268: "td-replica", + 269: "manet", + 271: "pt-tls", + 280: "http-mgmt", + 281: "personal-link", + 282: "cableport-ax", + 283: "rescap", + 284: "corerjd", + 286: "fxp", + 287: "k-block", + 308: "novastorbakcup", + 309: "entrusttime", + 310: "bhmds", + 311: "asip-webadmin", + 312: "vslmp", + 313: "magenta-logic", + 314: "opalis-robot", + 315: "dpsi", + 316: "decauth", + 317: "zannet", + 318: "pkix-timestamp", + 319: "ptp-event", + 320: "ptp-general", + 321: "pip", + 322: "rtsps", + 323: "rpki-rtr", + 324: "rpki-rtr-tls", + 333: "texar", + 344: "pdap", + 345: "pawserv", + 346: "zserv", + 347: "fatserv", + 348: "csi-sgwp", + 349: "mftp", + 350: "matip-type-a", + 351: "matip-type-b", + 352: "dtag-ste-sb", + 353: "ndsauth", + 354: "bh611", + 355: "datex-asn", + 356: "cloanto-net-1", + 357: "bhevent", + 358: "shrinkwrap", + 359: "nsrmp", + 360: "scoi2odialog", + 361: "semantix", + 362: "srssend", + 363: "rsvp-tunnel", + 364: "aurora-cmgr", + 365: "dtk", + 366: "odmr", + 367: "mortgageware", + 368: "qbikgdp", + 369: "rpc2portmap", + 370: "codaauth2", + 371: "clearcase", + 372: "ulistproc", + 373: "legent-1", + 374: "legent-2", + 375: "hassle", + 376: "nip", + 377: "tnETOS", + 378: "dsETOS", + 379: "is99c", + 380: "is99s", + 381: "hp-collector", + 382: "hp-managed-node", + 383: "hp-alarm-mgr", + 384: "arns", + 385: "ibm-app", + 386: "asa", + 387: "aurp", + 388: "unidata-ldm", + 389: "ldap", + 390: "uis", + 391: "synotics-relay", + 392: "synotics-broker", + 393: "meta5", + 394: "embl-ndt", + 395: "netcp", + 396: "netware-ip", + 397: "mptn", + 398: "kryptolan", + 399: "iso-tsap-c2", + 400: "osb-sd", + 401: "ups", + 402: "genie", + 403: "decap", + 404: "nced", + 405: "ncld", + 406: "imsp", + 407: "timbuktu", + 408: "prm-sm", + 409: "prm-nm", + 410: "decladebug", + 411: "rmt", + 412: "synoptics-trap", + 413: "smsp", + 414: "infoseek", + 415: "bnet", + 416: "silverplatter", + 417: "onmux", + 418: "hyper-g", + 419: "ariel1", + 420: "smpte", + 421: "ariel2", + 422: "ariel3", + 423: "opc-job-start", + 424: "opc-job-track", + 425: "icad-el", + 426: "smartsdp", + 427: "svrloc", + 428: "ocs-cmu", + 429: "ocs-amu", + 430: "utmpsd", + 431: "utmpcd", + 432: "iasd", + 433: "nnsp", + 434: "mobileip-agent", + 435: "mobilip-mn", + 436: "dna-cml", + 437: "comscm", + 438: "dsfgw", + 439: "dasp", + 440: "sgcp", + 441: "decvms-sysmgt", + 442: "cvc-hostd", + 443: "https", + 444: "snpp", + 445: "microsoft-ds", + 446: "ddm-rdb", + 447: "ddm-dfm", + 448: "ddm-ssl", + 449: "as-servermap", + 450: "tserver", + 451: "sfs-smp-net", + 452: "sfs-config", + 453: "creativeserver", + 454: "contentserver", + 455: "creativepartnr", + 456: "macon-tcp", + 457: "scohelp", + 458: "appleqtc", + 459: "ampr-rcmd", + 460: "skronk", + 461: "datasurfsrv", + 462: "datasurfsrvsec", + 463: "alpes", + 464: "kpasswd", + 465: "urd", + 466: "digital-vrc", + 467: "mylex-mapd", + 468: "photuris", + 469: "rcp", + 470: "scx-proxy", + 471: "mondex", + 472: "ljk-login", + 473: "hybrid-pop", + 474: "tn-tl-w1", + 475: "tcpnethaspsrv", + 476: "tn-tl-fd1", + 477: "ss7ns", + 478: "spsc", + 479: "iafserver", + 480: "iafdbase", + 481: "ph", + 482: "bgs-nsi", + 483: "ulpnet", + 484: "integra-sme", + 485: "powerburst", + 486: "avian", + 487: "saft", + 488: "gss-http", + 489: "nest-protocol", + 490: "micom-pfs", + 491: "go-login", + 492: "ticf-1", + 493: "ticf-2", + 494: "pov-ray", + 495: "intecourier", + 496: "pim-rp-disc", + 497: "retrospect", + 498: "siam", + 499: "iso-ill", + 500: "isakmp", + 501: "stmf", + 502: "mbap", + 503: "intrinsa", + 504: "citadel", + 505: "mailbox-lm", + 506: "ohimsrv", + 507: "crs", + 508: "xvttp", + 509: "snare", + 510: "fcp", + 511: "passgo", + 512: "exec", + 513: "login", + 514: "shell", + 515: "printer", + 516: "videotex", + 517: "talk", + 518: "ntalk", + 519: "utime", + 520: "efs", + 521: "ripng", + 522: "ulp", + 523: "ibm-db2", + 524: "ncp", + 525: "timed", + 526: "tempo", + 527: "stx", + 528: "custix", + 529: "irc-serv", + 530: "courier", + 531: "conference", + 532: "netnews", + 533: "netwall", + 534: "windream", + 535: "iiop", + 536: "opalis-rdv", + 537: "nmsp", + 538: "gdomap", + 539: "apertus-ldp", + 540: "uucp", + 541: "uucp-rlogin", + 542: "commerce", + 543: "klogin", + 544: "kshell", + 545: "appleqtcsrvr", + 546: "dhcpv6-client", + 547: "dhcpv6-server", + 548: "afpovertcp", + 549: "idfp", + 550: "new-rwho", + 551: "cybercash", + 552: "devshr-nts", + 553: "pirp", + 554: "rtsp", + 555: "dsf", + 556: "remotefs", + 557: "openvms-sysipc", + 558: "sdnskmp", + 559: "teedtap", + 560: "rmonitor", + 561: "monitor", + 562: "chshell", + 563: "nntps", + 564: "9pfs", + 565: "whoami", + 566: "streettalk", + 567: "banyan-rpc", + 568: "ms-shuttle", + 569: "ms-rome", + 570: "meter", + 571: "meter", + 572: "sonar", + 573: "banyan-vip", + 574: "ftp-agent", + 575: "vemmi", + 576: "ipcd", + 577: "vnas", + 578: "ipdd", + 579: "decbsrv", + 580: "sntp-heartbeat", + 581: "bdp", + 582: "scc-security", + 583: "philips-vc", + 584: "keyserver", + 586: "password-chg", + 587: "submission", + 588: "cal", + 589: "eyelink", + 590: "tns-cml", + 591: "http-alt", + 592: "eudora-set", + 593: "http-rpc-epmap", + 594: "tpip", + 595: "cab-protocol", + 596: "smsd", + 597: "ptcnameservice", + 598: "sco-websrvrmg3", + 599: "acp", + 600: "ipcserver", + 601: "syslog-conn", + 602: "xmlrpc-beep", + 603: "idxp", + 604: "tunnel", + 605: "soap-beep", + 606: "urm", + 607: "nqs", + 608: "sift-uft", + 609: "npmp-trap", + 610: "npmp-local", + 611: "npmp-gui", + 612: "hmmp-ind", + 613: "hmmp-op", + 614: "sshell", + 615: "sco-inetmgr", + 616: "sco-sysmgr", + 617: "sco-dtmgr", + 618: "dei-icda", + 619: "compaq-evm", + 620: "sco-websrvrmgr", + 621: "escp-ip", + 622: "collaborator", + 623: "oob-ws-http", + 624: "cryptoadmin", + 625: "dec-dlm", + 626: "asia", + 627: "passgo-tivoli", + 628: "qmqp", + 629: "3com-amp3", + 630: "rda", + 631: "ipp", + 632: "bmpp", + 633: "servstat", + 634: "ginad", + 635: "rlzdbase", + 636: "ldaps", + 637: "lanserver", + 638: "mcns-sec", + 639: "msdp", + 640: "entrust-sps", + 641: "repcmd", + 642: "esro-emsdp", + 643: "sanity", + 644: "dwr", + 645: "pssc", + 646: "ldp", + 647: "dhcp-failover", + 648: "rrp", + 649: "cadview-3d", + 650: "obex", + 651: "ieee-mms", + 652: "hello-port", + 653: "repscmd", + 654: "aodv", + 655: "tinc", + 656: "spmp", + 657: "rmc", + 658: "tenfold", + 660: "mac-srvr-admin", + 661: "hap", + 662: "pftp", + 663: "purenoise", + 664: "oob-ws-https", + 665: "sun-dr", + 666: "mdqs", + 667: "disclose", + 668: "mecomm", + 669: "meregister", + 670: "vacdsm-sws", + 671: "vacdsm-app", + 672: "vpps-qua", + 673: "cimplex", + 674: "acap", + 675: "dctp", + 676: "vpps-via", + 677: "vpp", + 678: "ggf-ncp", + 679: "mrm", + 680: "entrust-aaas", + 681: "entrust-aams", + 682: "xfr", + 683: "corba-iiop", + 684: "corba-iiop-ssl", + 685: "mdc-portmapper", + 686: "hcp-wismar", + 687: "asipregistry", + 688: "realm-rusd", + 689: "nmap", + 690: "vatp", + 691: "msexch-routing", + 692: "hyperwave-isp", + 693: "connendp", + 694: "ha-cluster", + 695: "ieee-mms-ssl", + 696: "rushd", + 697: "uuidgen", + 698: "olsr", + 699: "accessnetwork", + 700: "epp", + 701: "lmp", + 702: "iris-beep", + 704: "elcsd", + 705: "agentx", + 706: "silc", + 707: "borland-dsj", + 709: "entrust-kmsh", + 710: "entrust-ash", + 711: "cisco-tdp", + 712: "tbrpf", + 713: "iris-xpc", + 714: "iris-xpcs", + 715: "iris-lwz", + 729: "netviewdm1", + 730: "netviewdm2", + 731: "netviewdm3", + 741: "netgw", + 742: "netrcs", + 744: "flexlm", + 747: "fujitsu-dev", + 748: "ris-cm", + 749: "kerberos-adm", + 750: "rfile", + 751: "pump", + 752: "qrh", + 753: "rrh", + 754: "tell", + 758: "nlogin", + 759: "con", + 760: "ns", + 761: "rxe", + 762: "quotad", + 763: "cycleserv", + 764: "omserv", + 765: "webster", + 767: "phonebook", + 769: "vid", + 770: "cadlock", + 771: "rtip", + 772: "cycleserv2", + 773: "submit", + 774: "rpasswd", + 775: "entomb", + 776: "wpages", + 777: "multiling-http", + 780: "wpgs", + 800: "mdbs-daemon", + 801: "device", + 802: "mbap-s", + 810: "fcp-udp", + 828: "itm-mcell-s", + 829: "pkix-3-ca-ra", + 830: "netconf-ssh", + 831: "netconf-beep", + 832: "netconfsoaphttp", + 833: "netconfsoapbeep", + 847: "dhcp-failover2", + 848: "gdoi", + 853: "domain-s", + 854: "dlep", + 860: "iscsi", + 861: "owamp-control", + 862: "twamp-control", + 873: "rsync", + 886: "iclcnet-locate", + 887: "iclcnet-svinfo", + 888: "accessbuilder", + 900: "omginitialrefs", + 901: "smpnameres", + 902: "ideafarm-door", + 903: "ideafarm-panic", + 910: "kink", + 911: "xact-backup", + 912: "apex-mesh", + 913: "apex-edge", + 953: "rndc", + 989: "ftps-data", + 990: "ftps", + 991: "nas", + 992: "telnets", + 993: "imaps", + 995: "pop3s", + 996: "vsinet", + 997: "maitrd", + 998: "busboy", + 999: "garcon", + 1000: "cadlock2", + 1001: "webpush", + 1010: "surf", + 1021: "exp1", + 1022: "exp2", + 1025: "blackjack", + 1026: "cap", + 1029: "solid-mux", + 1033: "netinfo-local", + 1034: "activesync", + 1035: "mxxrlogin", + 1036: "nsstp", + 1037: "ams", + 1038: "mtqp", + 1039: "sbl", + 1040: "netarx", + 1041: "danf-ak2", + 1042: "afrog", + 1043: "boinc-client", + 1044: "dcutility", + 1045: "fpitp", + 1046: "wfremotertm", + 1047: "neod1", + 1048: "neod2", + 1049: "td-postman", + 1050: "cma", + 1051: "optima-vnet", + 1052: "ddt", + 1053: "remote-as", + 1054: "brvread", + 1055: "ansyslmd", + 1056: "vfo", + 1057: "startron", + 1058: "nim", + 1059: "nimreg", + 1060: "polestar", + 1061: "kiosk", + 1062: "veracity", + 1063: "kyoceranetdev", + 1064: "jstel", + 1065: "syscomlan", + 1066: "fpo-fns", + 1067: "instl-boots", + 1068: "instl-bootc", + 1069: "cognex-insight", + 1070: "gmrupdateserv", + 1071: "bsquare-voip", + 1072: "cardax", + 1073: "bridgecontrol", + 1074: "warmspotMgmt", + 1075: "rdrmshc", + 1076: "dab-sti-c", + 1077: "imgames", + 1078: "avocent-proxy", + 1079: "asprovatalk", + 1080: "socks", + 1081: "pvuniwien", + 1082: "amt-esd-prot", + 1083: "ansoft-lm-1", + 1084: "ansoft-lm-2", + 1085: "webobjects", + 1086: "cplscrambler-lg", + 1087: "cplscrambler-in", + 1088: "cplscrambler-al", + 1089: "ff-annunc", + 1090: "ff-fms", + 1091: "ff-sm", + 1092: "obrpd", + 1093: "proofd", + 1094: "rootd", + 1095: "nicelink", + 1096: "cnrprotocol", + 1097: "sunclustermgr", + 1098: "rmiactivation", + 1099: "rmiregistry", + 1100: "mctp", + 1101: "pt2-discover", + 1102: "adobeserver-1", + 1103: "adobeserver-2", + 1104: "xrl", + 1105: "ftranhc", + 1106: "isoipsigport-1", + 1107: "isoipsigport-2", + 1108: "ratio-adp", + 1110: "webadmstart", + 1111: "lmsocialserver", + 1112: "icp", + 1113: "ltp-deepspace", + 1114: "mini-sql", + 1115: "ardus-trns", + 1116: "ardus-cntl", + 1117: "ardus-mtrns", + 1118: "sacred", + 1119: "bnetgame", + 1120: "bnetfile", + 1121: "rmpp", + 1122: "availant-mgr", + 1123: "murray", + 1124: "hpvmmcontrol", + 1125: "hpvmmagent", + 1126: "hpvmmdata", + 1127: "kwdb-commn", + 1128: "saphostctrl", + 1129: "saphostctrls", + 1130: "casp", + 1131: "caspssl", + 1132: "kvm-via-ip", + 1133: "dfn", + 1134: "aplx", + 1135: "omnivision", + 1136: "hhb-gateway", + 1137: "trim", + 1138: "encrypted-admin", + 1139: "evm", + 1140: "autonoc", + 1141: "mxomss", + 1142: "edtools", + 1143: "imyx", + 1144: "fuscript", + 1145: "x9-icue", + 1146: "audit-transfer", + 1147: "capioverlan", + 1148: "elfiq-repl", + 1149: "bvtsonar", + 1150: "blaze", + 1151: "unizensus", + 1152: "winpoplanmess", + 1153: "c1222-acse", + 1154: "resacommunity", + 1155: "nfa", + 1156: "iascontrol-oms", + 1157: "iascontrol", + 1158: "dbcontrol-oms", + 1159: "oracle-oms", + 1160: "olsv", + 1161: "health-polling", + 1162: "health-trap", + 1163: "sddp", + 1164: "qsm-proxy", + 1165: "qsm-gui", + 1166: "qsm-remote", + 1167: "cisco-ipsla", + 1168: "vchat", + 1169: "tripwire", + 1170: "atc-lm", + 1171: "atc-appserver", + 1172: "dnap", + 1173: "d-cinema-rrp", + 1174: "fnet-remote-ui", + 1175: "dossier", + 1176: "indigo-server", + 1177: "dkmessenger", + 1178: "sgi-storman", + 1179: "b2n", + 1180: "mc-client", + 1181: "3comnetman", + 1182: "accelenet", + 1183: "llsurfup-http", + 1184: "llsurfup-https", + 1185: "catchpole", + 1186: "mysql-cluster", + 1187: "alias", + 1188: "hp-webadmin", + 1189: "unet", + 1190: "commlinx-avl", + 1191: "gpfs", + 1192: "caids-sensor", + 1193: "fiveacross", + 1194: "openvpn", + 1195: "rsf-1", + 1196: "netmagic", + 1197: "carrius-rshell", + 1198: "cajo-discovery", + 1199: "dmidi", + 1200: "scol", + 1201: "nucleus-sand", + 1202: "caiccipc", + 1203: "ssslic-mgr", + 1204: "ssslog-mgr", + 1205: "accord-mgc", + 1206: "anthony-data", + 1207: "metasage", + 1208: "seagull-ais", + 1209: "ipcd3", + 1210: "eoss", + 1211: "groove-dpp", + 1212: "lupa", + 1213: "mpc-lifenet", + 1214: "kazaa", + 1215: "scanstat-1", + 1216: "etebac5", + 1217: "hpss-ndapi", + 1218: "aeroflight-ads", + 1219: "aeroflight-ret", + 1220: "qt-serveradmin", + 1221: "sweetware-apps", + 1222: "nerv", + 1223: "tgp", + 1224: "vpnz", + 1225: "slinkysearch", + 1226: "stgxfws", + 1227: "dns2go", + 1228: "florence", + 1229: "zented", + 1230: "periscope", + 1231: "menandmice-lpm", + 1232: "first-defense", + 1233: "univ-appserver", + 1234: "search-agent", + 1235: "mosaicsyssvc1", + 1236: "bvcontrol", + 1237: "tsdos390", + 1238: "hacl-qs", + 1239: "nmsd", + 1240: "instantia", + 1241: "nessus", + 1242: "nmasoverip", + 1243: "serialgateway", + 1244: "isbconference1", + 1245: "isbconference2", + 1246: "payrouter", + 1247: "visionpyramid", + 1248: "hermes", + 1249: "mesavistaco", + 1250: "swldy-sias", + 1251: "servergraph", + 1252: "bspne-pcc", + 1253: "q55-pcc", + 1254: "de-noc", + 1255: "de-cache-query", + 1256: "de-server", + 1257: "shockwave2", + 1258: "opennl", + 1259: "opennl-voice", + 1260: "ibm-ssd", + 1261: "mpshrsv", + 1262: "qnts-orb", + 1263: "dka", + 1264: "prat", + 1265: "dssiapi", + 1266: "dellpwrappks", + 1267: "epc", + 1268: "propel-msgsys", + 1269: "watilapp", + 1270: "opsmgr", + 1271: "excw", + 1272: "cspmlockmgr", + 1273: "emc-gateway", + 1274: "t1distproc", + 1275: "ivcollector", + 1277: "miva-mqs", + 1278: "dellwebadmin-1", + 1279: "dellwebadmin-2", + 1280: "pictrography", + 1281: "healthd", + 1282: "emperion", + 1283: "productinfo", + 1284: "iee-qfx", + 1285: "neoiface", + 1286: "netuitive", + 1287: "routematch", + 1288: "navbuddy", + 1289: "jwalkserver", + 1290: "winjaserver", + 1291: "seagulllms", + 1292: "dsdn", + 1293: "pkt-krb-ipsec", + 1294: "cmmdriver", + 1295: "ehtp", + 1296: "dproxy", + 1297: "sdproxy", + 1298: "lpcp", + 1299: "hp-sci", + 1300: "h323hostcallsc", + 1301: "ci3-software-1", + 1302: "ci3-software-2", + 1303: "sftsrv", + 1304: "boomerang", + 1305: "pe-mike", + 1306: "re-conn-proto", + 1307: "pacmand", + 1308: "odsi", + 1309: "jtag-server", + 1310: "husky", + 1311: "rxmon", + 1312: "sti-envision", + 1313: "bmc-patroldb", + 1314: "pdps", + 1315: "els", + 1316: "exbit-escp", + 1317: "vrts-ipcserver", + 1318: "krb5gatekeeper", + 1319: "amx-icsp", + 1320: "amx-axbnet", + 1321: "pip", + 1322: "novation", + 1323: "brcd", + 1324: "delta-mcp", + 1325: "dx-instrument", + 1326: "wimsic", + 1327: "ultrex", + 1328: "ewall", + 1329: "netdb-export", + 1330: "streetperfect", + 1331: "intersan", + 1332: "pcia-rxp-b", + 1333: "passwrd-policy", + 1334: "writesrv", + 1335: "digital-notary", + 1336: "ischat", + 1337: "menandmice-dns", + 1338: "wmc-log-svc", + 1339: "kjtsiteserver", + 1340: "naap", + 1341: "qubes", + 1342: "esbroker", + 1343: "re101", + 1344: "icap", + 1345: "vpjp", + 1346: "alta-ana-lm", + 1347: "bbn-mmc", + 1348: "bbn-mmx", + 1349: "sbook", + 1350: "editbench", + 1351: "equationbuilder", + 1352: "lotusnote", + 1353: "relief", + 1354: "XSIP-network", + 1355: "intuitive-edge", + 1356: "cuillamartin", + 1357: "pegboard", + 1358: "connlcli", + 1359: "ftsrv", + 1360: "mimer", + 1361: "linx", + 1362: "timeflies", + 1363: "ndm-requester", + 1364: "ndm-server", + 1365: "adapt-sna", + 1366: "netware-csp", + 1367: "dcs", + 1368: "screencast", + 1369: "gv-us", + 1370: "us-gv", + 1371: "fc-cli", + 1372: "fc-ser", + 1373: "chromagrafx", + 1374: "molly", + 1375: "bytex", + 1376: "ibm-pps", + 1377: "cichlid", + 1378: "elan", + 1379: "dbreporter", + 1380: "telesis-licman", + 1381: "apple-licman", + 1382: "udt-os", + 1383: "gwha", + 1384: "os-licman", + 1385: "atex-elmd", + 1386: "checksum", + 1387: "cadsi-lm", + 1388: "objective-dbc", + 1389: "iclpv-dm", + 1390: "iclpv-sc", + 1391: "iclpv-sas", + 1392: "iclpv-pm", + 1393: "iclpv-nls", + 1394: "iclpv-nlc", + 1395: "iclpv-wsm", + 1396: "dvl-activemail", + 1397: "audio-activmail", + 1398: "video-activmail", + 1399: "cadkey-licman", + 1400: "cadkey-tablet", + 1401: "goldleaf-licman", + 1402: "prm-sm-np", + 1403: "prm-nm-np", + 1404: "igi-lm", + 1405: "ibm-res", + 1406: "netlabs-lm", + 1407: "tibet-server", + 1408: "sophia-lm", + 1409: "here-lm", + 1410: "hiq", + 1411: "af", + 1412: "innosys", + 1413: "innosys-acl", + 1414: "ibm-mqseries", + 1415: "dbstar", + 1416: "novell-lu6-2", + 1417: "timbuktu-srv1", + 1418: "timbuktu-srv2", + 1419: "timbuktu-srv3", + 1420: "timbuktu-srv4", + 1421: "gandalf-lm", + 1422: "autodesk-lm", + 1423: "essbase", + 1424: "hybrid", + 1425: "zion-lm", + 1426: "sais", + 1427: "mloadd", + 1428: "informatik-lm", + 1429: "nms", + 1430: "tpdu", + 1431: "rgtp", + 1432: "blueberry-lm", + 1433: "ms-sql-s", + 1434: "ms-sql-m", + 1435: "ibm-cics", + 1436: "saism", + 1437: "tabula", + 1438: "eicon-server", + 1439: "eicon-x25", + 1440: "eicon-slp", + 1441: "cadis-1", + 1442: "cadis-2", + 1443: "ies-lm", + 1444: "marcam-lm", + 1445: "proxima-lm", + 1446: "ora-lm", + 1447: "apri-lm", + 1448: "oc-lm", + 1449: "peport", + 1450: "dwf", + 1451: "infoman", + 1452: "gtegsc-lm", + 1453: "genie-lm", + 1454: "interhdl-elmd", + 1455: "esl-lm", + 1456: "dca", + 1457: "valisys-lm", + 1458: "nrcabq-lm", + 1459: "proshare1", + 1460: "proshare2", + 1461: "ibm-wrless-lan", + 1462: "world-lm", + 1463: "nucleus", + 1464: "msl-lmd", + 1465: "pipes", + 1466: "oceansoft-lm", + 1467: "csdmbase", + 1468: "csdm", + 1469: "aal-lm", + 1470: "uaiact", + 1471: "csdmbase", + 1472: "csdm", + 1473: "openmath", + 1474: "telefinder", + 1475: "taligent-lm", + 1476: "clvm-cfg", + 1477: "ms-sna-server", + 1478: "ms-sna-base", + 1479: "dberegister", + 1480: "pacerforum", + 1481: "airs", + 1482: "miteksys-lm", + 1483: "afs", + 1484: "confluent", + 1485: "lansource", + 1486: "nms-topo-serv", + 1487: "localinfosrvr", + 1488: "docstor", + 1489: "dmdocbroker", + 1490: "insitu-conf", + 1492: "stone-design-1", + 1493: "netmap-lm", + 1494: "ica", + 1495: "cvc", + 1496: "liberty-lm", + 1497: "rfx-lm", + 1498: "sybase-sqlany", + 1499: "fhc", + 1500: "vlsi-lm", + 1501: "saiscm", + 1502: "shivadiscovery", + 1503: "imtc-mcs", + 1504: "evb-elm", + 1505: "funkproxy", + 1506: "utcd", + 1507: "symplex", + 1508: "diagmond", + 1509: "robcad-lm", + 1510: "mvx-lm", + 1511: "3l-l1", + 1512: "wins", + 1513: "fujitsu-dtc", + 1514: "fujitsu-dtcns", + 1515: "ifor-protocol", + 1516: "vpad", + 1517: "vpac", + 1518: "vpvd", + 1519: "vpvc", + 1520: "atm-zip-office", + 1521: "ncube-lm", + 1522: "ricardo-lm", + 1523: "cichild-lm", + 1524: "ingreslock", + 1525: "orasrv", + 1526: "pdap-np", + 1527: "tlisrv", + 1529: "coauthor", + 1530: "rap-service", + 1531: "rap-listen", + 1532: "miroconnect", + 1533: "virtual-places", + 1534: "micromuse-lm", + 1535: "ampr-info", + 1536: "ampr-inter", + 1537: "sdsc-lm", + 1538: "3ds-lm", + 1539: "intellistor-lm", + 1540: "rds", + 1541: "rds2", + 1542: "gridgen-elmd", + 1543: "simba-cs", + 1544: "aspeclmd", + 1545: "vistium-share", + 1546: "abbaccuray", + 1547: "laplink", + 1548: "axon-lm", + 1549: "shivahose", + 1550: "3m-image-lm", + 1551: "hecmtl-db", + 1552: "pciarray", + 1553: "sna-cs", + 1554: "caci-lm", + 1555: "livelan", + 1556: "veritas-pbx", + 1557: "arbortext-lm", + 1558: "xingmpeg", + 1559: "web2host", + 1560: "asci-val", + 1561: "facilityview", + 1562: "pconnectmgr", + 1563: "cadabra-lm", + 1564: "pay-per-view", + 1565: "winddlb", + 1566: "corelvideo", + 1567: "jlicelmd", + 1568: "tsspmap", + 1569: "ets", + 1570: "orbixd", + 1571: "rdb-dbs-disp", + 1572: "chip-lm", + 1573: "itscomm-ns", + 1574: "mvel-lm", + 1575: "oraclenames", + 1576: "moldflow-lm", + 1577: "hypercube-lm", + 1578: "jacobus-lm", + 1579: "ioc-sea-lm", + 1580: "tn-tl-r1", + 1581: "mil-2045-47001", + 1582: "msims", + 1583: "simbaexpress", + 1584: "tn-tl-fd2", + 1585: "intv", + 1586: "ibm-abtact", + 1587: "pra-elmd", + 1588: "triquest-lm", + 1589: "vqp", + 1590: "gemini-lm", + 1591: "ncpm-pm", + 1592: "commonspace", + 1593: "mainsoft-lm", + 1594: "sixtrak", + 1595: "radio", + 1596: "radio-sm", + 1597: "orbplus-iiop", + 1598: "picknfs", + 1599: "simbaservices", + 1600: "issd", + 1601: "aas", + 1602: "inspect", + 1603: "picodbc", + 1604: "icabrowser", + 1605: "slp", + 1606: "slm-api", + 1607: "stt", + 1608: "smart-lm", + 1609: "isysg-lm", + 1610: "taurus-wh", + 1611: "ill", + 1612: "netbill-trans", + 1613: "netbill-keyrep", + 1614: "netbill-cred", + 1615: "netbill-auth", + 1616: "netbill-prod", + 1617: "nimrod-agent", + 1618: "skytelnet", + 1619: "xs-openstorage", + 1620: "faxportwinport", + 1621: "softdataphone", + 1622: "ontime", + 1623: "jaleosnd", + 1624: "udp-sr-port", + 1625: "svs-omagent", + 1626: "shockwave", + 1627: "t128-gateway", + 1628: "lontalk-norm", + 1629: "lontalk-urgnt", + 1630: "oraclenet8cman", + 1631: "visitview", + 1632: "pammratc", + 1633: "pammrpc", + 1634: "loaprobe", + 1635: "edb-server1", + 1636: "isdc", + 1637: "islc", + 1638: "ismc", + 1639: "cert-initiator", + 1640: "cert-responder", + 1641: "invision", + 1642: "isis-am", + 1643: "isis-ambc", + 1644: "saiseh", + 1645: "sightline", + 1646: "sa-msg-port", + 1647: "rsap", + 1648: "concurrent-lm", + 1649: "kermit", + 1650: "nkd", + 1651: "shiva-confsrvr", + 1652: "xnmp", + 1653: "alphatech-lm", + 1654: "stargatealerts", + 1655: "dec-mbadmin", + 1656: "dec-mbadmin-h", + 1657: "fujitsu-mmpdc", + 1658: "sixnetudr", + 1659: "sg-lm", + 1660: "skip-mc-gikreq", + 1661: "netview-aix-1", + 1662: "netview-aix-2", + 1663: "netview-aix-3", + 1664: "netview-aix-4", + 1665: "netview-aix-5", + 1666: "netview-aix-6", + 1667: "netview-aix-7", + 1668: "netview-aix-8", + 1669: "netview-aix-9", + 1670: "netview-aix-10", + 1671: "netview-aix-11", + 1672: "netview-aix-12", + 1673: "proshare-mc-1", + 1674: "proshare-mc-2", + 1675: "pdp", + 1676: "netcomm1", + 1677: "groupwise", + 1678: "prolink", + 1679: "darcorp-lm", + 1680: "microcom-sbp", + 1681: "sd-elmd", + 1682: "lanyon-lantern", + 1683: "ncpm-hip", + 1684: "snaresecure", + 1685: "n2nremote", + 1686: "cvmon", + 1687: "nsjtp-ctrl", + 1688: "nsjtp-data", + 1689: "firefox", + 1690: "ng-umds", + 1691: "empire-empuma", + 1692: "sstsys-lm", + 1693: "rrirtr", + 1694: "rrimwm", + 1695: "rrilwm", + 1696: "rrifmm", + 1697: "rrisat", + 1698: "rsvp-encap-1", + 1699: "rsvp-encap-2", + 1700: "mps-raft", + 1701: "l2f", + 1702: "deskshare", + 1703: "hb-engine", + 1704: "bcs-broker", + 1705: "slingshot", + 1706: "jetform", + 1707: "vdmplay", + 1708: "gat-lmd", + 1709: "centra", + 1710: "impera", + 1711: "pptconference", + 1712: "registrar", + 1713: "conferencetalk", + 1714: "sesi-lm", + 1715: "houdini-lm", + 1716: "xmsg", + 1717: "fj-hdnet", + 1718: "h323gatedisc", + 1719: "h323gatestat", + 1720: "h323hostcall", + 1721: "caicci", + 1722: "hks-lm", + 1723: "pptp", + 1724: "csbphonemaster", + 1725: "iden-ralp", + 1726: "iberiagames", + 1727: "winddx", + 1728: "telindus", + 1729: "citynl", + 1730: "roketz", + 1731: "msiccp", + 1732: "proxim", + 1733: "siipat", + 1734: "cambertx-lm", + 1735: "privatechat", + 1736: "street-stream", + 1737: "ultimad", + 1738: "gamegen1", + 1739: "webaccess", + 1740: "encore", + 1741: "cisco-net-mgmt", + 1742: "3Com-nsd", + 1743: "cinegrfx-lm", + 1744: "ncpm-ft", + 1745: "remote-winsock", + 1746: "ftrapid-1", + 1747: "ftrapid-2", + 1748: "oracle-em1", + 1749: "aspen-services", + 1750: "sslp", + 1751: "swiftnet", + 1752: "lofr-lm", + 1753: "predatar-comms", + 1754: "oracle-em2", + 1755: "ms-streaming", + 1756: "capfast-lmd", + 1757: "cnhrp", + 1758: "tftp-mcast", + 1759: "spss-lm", + 1760: "www-ldap-gw", + 1761: "cft-0", + 1762: "cft-1", + 1763: "cft-2", + 1764: "cft-3", + 1765: "cft-4", + 1766: "cft-5", + 1767: "cft-6", + 1768: "cft-7", + 1769: "bmc-net-adm", + 1770: "bmc-net-svc", + 1771: "vaultbase", + 1772: "essweb-gw", + 1773: "kmscontrol", + 1774: "global-dtserv", + 1775: "vdab", + 1776: "femis", + 1777: "powerguardian", + 1778: "prodigy-intrnet", + 1779: "pharmasoft", + 1780: "dpkeyserv", + 1781: "answersoft-lm", + 1782: "hp-hcip", + 1784: "finle-lm", + 1785: "windlm", + 1786: "funk-logger", + 1787: "funk-license", + 1788: "psmond", + 1789: "hello", + 1790: "nmsp", + 1791: "ea1", + 1792: "ibm-dt-2", + 1793: "rsc-robot", + 1794: "cera-bcm", + 1795: "dpi-proxy", + 1796: "vocaltec-admin", + 1797: "uma", + 1798: "etp", + 1799: "netrisk", + 1800: "ansys-lm", + 1801: "msmq", + 1802: "concomp1", + 1803: "hp-hcip-gwy", + 1804: "enl", + 1805: "enl-name", + 1806: "musiconline", + 1807: "fhsp", + 1808: "oracle-vp2", + 1809: "oracle-vp1", + 1810: "jerand-lm", + 1811: "scientia-sdb", + 1812: "radius", + 1813: "radius-acct", + 1814: "tdp-suite", + 1815: "mmpft", + 1816: "harp", + 1817: "rkb-oscs", + 1818: "etftp", + 1819: "plato-lm", + 1820: "mcagent", + 1821: "donnyworld", + 1822: "es-elmd", + 1823: "unisys-lm", + 1824: "metrics-pas", + 1825: "direcpc-video", + 1826: "ardt", + 1827: "asi", + 1828: "itm-mcell-u", + 1829: "optika-emedia", + 1830: "net8-cman", + 1831: "myrtle", + 1832: "tht-treasure", + 1833: "udpradio", + 1834: "ardusuni", + 1835: "ardusmul", + 1836: "ste-smsc", + 1837: "csoft1", + 1838: "talnet", + 1839: "netopia-vo1", + 1840: "netopia-vo2", + 1841: "netopia-vo3", + 1842: "netopia-vo4", + 1843: "netopia-vo5", + 1844: "direcpc-dll", + 1845: "altalink", + 1846: "tunstall-pnc", + 1847: "slp-notify", + 1848: "fjdocdist", + 1849: "alpha-sms", + 1850: "gsi", + 1851: "ctcd", + 1852: "virtual-time", + 1853: "vids-avtp", + 1854: "buddy-draw", + 1855: "fiorano-rtrsvc", + 1856: "fiorano-msgsvc", + 1857: "datacaptor", + 1858: "privateark", + 1859: "gammafetchsvr", + 1860: "sunscalar-svc", + 1861: "lecroy-vicp", + 1862: "mysql-cm-agent", + 1863: "msnp", + 1864: "paradym-31port", + 1865: "entp", + 1866: "swrmi", + 1867: "udrive", + 1868: "viziblebrowser", + 1869: "transact", + 1870: "sunscalar-dns", + 1871: "canocentral0", + 1872: "canocentral1", + 1873: "fjmpjps", + 1874: "fjswapsnp", + 1875: "westell-stats", + 1876: "ewcappsrv", + 1877: "hp-webqosdb", + 1878: "drmsmc", + 1879: "nettgain-nms", + 1880: "vsat-control", + 1881: "ibm-mqseries2", + 1882: "ecsqdmn", + 1883: "mqtt", + 1884: "idmaps", + 1885: "vrtstrapserver", + 1886: "leoip", + 1887: "filex-lport", + 1888: "ncconfig", + 1889: "unify-adapter", + 1890: "wilkenlistener", + 1891: "childkey-notif", + 1892: "childkey-ctrl", + 1893: "elad", + 1894: "o2server-port", + 1896: "b-novative-ls", + 1897: "metaagent", + 1898: "cymtec-port", + 1899: "mc2studios", + 1900: "ssdp", + 1901: "fjicl-tep-a", + 1902: "fjicl-tep-b", + 1903: "linkname", + 1904: "fjicl-tep-c", + 1905: "sugp", + 1906: "tpmd", + 1907: "intrastar", + 1908: "dawn", + 1909: "global-wlink", + 1910: "ultrabac", + 1911: "mtp", + 1912: "rhp-iibp", + 1913: "armadp", + 1914: "elm-momentum", + 1915: "facelink", + 1916: "persona", + 1917: "noagent", + 1918: "can-nds", + 1919: "can-dch", + 1920: "can-ferret", + 1921: "noadmin", + 1922: "tapestry", + 1923: "spice", + 1924: "xiip", + 1925: "discovery-port", + 1926: "egs", + 1927: "videte-cipc", + 1928: "emsd-port", + 1929: "bandwiz-system", + 1930: "driveappserver", + 1931: "amdsched", + 1932: "ctt-broker", + 1933: "xmapi", + 1934: "xaapi", + 1935: "macromedia-fcs", + 1936: "jetcmeserver", + 1937: "jwserver", + 1938: "jwclient", + 1939: "jvserver", + 1940: "jvclient", + 1941: "dic-aida", + 1942: "res", + 1943: "beeyond-media", + 1944: "close-combat", + 1945: "dialogic-elmd", + 1946: "tekpls", + 1947: "sentinelsrm", + 1948: "eye2eye", + 1949: "ismaeasdaqlive", + 1950: "ismaeasdaqtest", + 1951: "bcs-lmserver", + 1952: "mpnjsc", + 1953: "rapidbase", + 1954: "abr-api", + 1955: "abr-secure", + 1956: "vrtl-vmf-ds", + 1957: "unix-status", + 1958: "dxadmind", + 1959: "simp-all", + 1960: "nasmanager", + 1961: "bts-appserver", + 1962: "biap-mp", + 1963: "webmachine", + 1964: "solid-e-engine", + 1965: "tivoli-npm", + 1966: "slush", + 1967: "sns-quote", + 1968: "lipsinc", + 1969: "lipsinc1", + 1970: "netop-rc", + 1971: "netop-school", + 1972: "intersys-cache", + 1973: "dlsrap", + 1974: "drp", + 1975: "tcoflashagent", + 1976: "tcoregagent", + 1977: "tcoaddressbook", + 1978: "unisql", + 1979: "unisql-java", + 1980: "pearldoc-xact", + 1981: "p2pq", + 1982: "estamp", + 1983: "lhtp", + 1984: "bb", + 1985: "hsrp", + 1986: "licensedaemon", + 1987: "tr-rsrb-p1", + 1988: "tr-rsrb-p2", + 1989: "tr-rsrb-p3", + 1990: "stun-p1", + 1991: "stun-p2", + 1992: "stun-p3", + 1993: "snmp-tcp-port", + 1994: "stun-port", + 1995: "perf-port", + 1996: "tr-rsrb-port", + 1997: "gdp-port", + 1998: "x25-svc-port", + 1999: "tcp-id-port", + 2000: "cisco-sccp", + 2001: "dc", + 2002: "globe", + 2003: "brutus", + 2004: "mailbox", + 2005: "berknet", + 2006: "invokator", + 2007: "dectalk", + 2008: "conf", + 2009: "news", + 2010: "search", + 2011: "raid-cc", + 2012: "ttyinfo", + 2013: "raid-am", + 2014: "troff", + 2015: "cypress", + 2016: "bootserver", + 2017: "cypress-stat", + 2018: "terminaldb", + 2019: "whosockami", + 2020: "xinupageserver", + 2021: "servexec", + 2022: "down", + 2023: "xinuexpansion3", + 2024: "xinuexpansion4", + 2025: "ellpack", + 2026: "scrabble", + 2027: "shadowserver", + 2028: "submitserver", + 2029: "hsrpv6", + 2030: "device2", + 2031: "mobrien-chat", + 2032: "blackboard", + 2033: "glogger", + 2034: "scoremgr", + 2035: "imsldoc", + 2036: "e-dpnet", + 2037: "applus", + 2038: "objectmanager", + 2039: "prizma", + 2040: "lam", + 2041: "interbase", + 2042: "isis", + 2043: "isis-bcast", + 2044: "rimsl", + 2045: "cdfunc", + 2046: "sdfunc", + 2047: "dls", + 2048: "dls-monitor", + 2049: "shilp", + 2050: "av-emb-config", + 2051: "epnsdp", + 2052: "clearvisn", + 2053: "lot105-ds-upd", + 2054: "weblogin", + 2055: "iop", + 2056: "omnisky", + 2057: "rich-cp", + 2058: "newwavesearch", + 2059: "bmc-messaging", + 2060: "teleniumdaemon", + 2061: "netmount", + 2062: "icg-swp", + 2063: "icg-bridge", + 2064: "icg-iprelay", + 2065: "dlsrpn", + 2066: "aura", + 2067: "dlswpn", + 2068: "avauthsrvprtcl", + 2069: "event-port", + 2070: "ah-esp-encap", + 2071: "acp-port", + 2072: "msync", + 2073: "gxs-data-port", + 2074: "vrtl-vmf-sa", + 2075: "newlixengine", + 2076: "newlixconfig", + 2077: "tsrmagt", + 2078: "tpcsrvr", + 2079: "idware-router", + 2080: "autodesk-nlm", + 2081: "kme-trap-port", + 2082: "infowave", + 2083: "radsec", + 2084: "sunclustergeo", + 2085: "ada-cip", + 2086: "gnunet", + 2087: "eli", + 2088: "ip-blf", + 2089: "sep", + 2090: "lrp", + 2091: "prp", + 2092: "descent3", + 2093: "nbx-cc", + 2094: "nbx-au", + 2095: "nbx-ser", + 2096: "nbx-dir", + 2097: "jetformpreview", + 2098: "dialog-port", + 2099: "h2250-annex-g", + 2100: "amiganetfs", + 2101: "rtcm-sc104", + 2102: "zephyr-srv", + 2103: "zephyr-clt", + 2104: "zephyr-hm", + 2105: "minipay", + 2106: "mzap", + 2107: "bintec-admin", + 2108: "comcam", + 2109: "ergolight", + 2110: "umsp", + 2111: "dsatp", + 2112: "idonix-metanet", + 2113: "hsl-storm", + 2114: "newheights", + 2115: "kdm", + 2116: "ccowcmr", + 2117: "mentaclient", + 2118: "mentaserver", + 2119: "gsigatekeeper", + 2120: "qencp", + 2121: "scientia-ssdb", + 2122: "caupc-remote", + 2123: "gtp-control", + 2124: "elatelink", + 2125: "lockstep", + 2126: "pktcable-cops", + 2127: "index-pc-wb", + 2128: "net-steward", + 2129: "cs-live", + 2130: "xds", + 2131: "avantageb2b", + 2132: "solera-epmap", + 2133: "zymed-zpp", + 2134: "avenue", + 2135: "gris", + 2136: "appworxsrv", + 2137: "connect", + 2138: "unbind-cluster", + 2139: "ias-auth", + 2140: "ias-reg", + 2141: "ias-admind", + 2142: "tdmoip", + 2143: "lv-jc", + 2144: "lv-ffx", + 2145: "lv-pici", + 2146: "lv-not", + 2147: "lv-auth", + 2148: "veritas-ucl", + 2149: "acptsys", + 2150: "dynamic3d", + 2151: "docent", + 2152: "gtp-user", + 2153: "ctlptc", + 2154: "stdptc", + 2155: "brdptc", + 2156: "trp", + 2157: "xnds", + 2158: "touchnetplus", + 2159: "gdbremote", + 2160: "apc-2160", + 2161: "apc-2161", + 2162: "navisphere", + 2163: "navisphere-sec", + 2164: "ddns-v3", + 2165: "x-bone-api", + 2166: "iwserver", + 2167: "raw-serial", + 2168: "easy-soft-mux", + 2169: "brain", + 2170: "eyetv", + 2171: "msfw-storage", + 2172: "msfw-s-storage", + 2173: "msfw-replica", + 2174: "msfw-array", + 2175: "airsync", + 2176: "rapi", + 2177: "qwave", + 2178: "bitspeer", + 2179: "vmrdp", + 2180: "mc-gt-srv", + 2181: "eforward", + 2182: "cgn-stat", + 2183: "cgn-config", + 2184: "nvd", + 2185: "onbase-dds", + 2186: "gtaua", + 2187: "ssmc", + 2188: "radware-rpm", + 2189: "radware-rpm-s", + 2190: "tivoconnect", + 2191: "tvbus", + 2192: "asdis", + 2193: "drwcs", + 2197: "mnp-exchange", + 2198: "onehome-remote", + 2199: "onehome-help", + 2200: "ici", + 2201: "ats", + 2202: "imtc-map", + 2203: "b2-runtime", + 2204: "b2-license", + 2205: "jps", + 2206: "hpocbus", + 2207: "hpssd", + 2208: "hpiod", + 2209: "rimf-ps", + 2210: "noaaport", + 2211: "emwin", + 2212: "leecoposserver", + 2213: "kali", + 2214: "rpi", + 2215: "ipcore", + 2216: "vtu-comms", + 2217: "gotodevice", + 2218: "bounzza", + 2219: "netiq-ncap", + 2220: "netiq", + 2221: "ethernet-ip-s", + 2222: "EtherNet-IP-1", + 2223: "rockwell-csp2", + 2224: "efi-mg", + 2225: "rcip-itu", + 2226: "di-drm", + 2227: "di-msg", + 2228: "ehome-ms", + 2229: "datalens", + 2230: "queueadm", + 2231: "wimaxasncp", + 2232: "ivs-video", + 2233: "infocrypt", + 2234: "directplay", + 2235: "sercomm-wlink", + 2236: "nani", + 2237: "optech-port1-lm", + 2238: "aviva-sna", + 2239: "imagequery", + 2240: "recipe", + 2241: "ivsd", + 2242: "foliocorp", + 2243: "magicom", + 2244: "nmsserver", + 2245: "hao", + 2246: "pc-mta-addrmap", + 2247: "antidotemgrsvr", + 2248: "ums", + 2249: "rfmp", + 2250: "remote-collab", + 2251: "dif-port", + 2252: "njenet-ssl", + 2253: "dtv-chan-req", + 2254: "seispoc", + 2255: "vrtp", + 2256: "pcc-mfp", + 2257: "simple-tx-rx", + 2258: "rcts", + 2260: "apc-2260", + 2261: "comotionmaster", + 2262: "comotionback", + 2263: "ecwcfg", + 2264: "apx500api-1", + 2265: "apx500api-2", + 2266: "mfserver", + 2267: "ontobroker", + 2268: "amt", + 2269: "mikey", + 2270: "starschool", + 2271: "mmcals", + 2272: "mmcal", + 2273: "mysql-im", + 2274: "pcttunnell", + 2275: "ibridge-data", + 2276: "ibridge-mgmt", + 2277: "bluectrlproxy", + 2278: "s3db", + 2279: "xmquery", + 2280: "lnvpoller", + 2281: "lnvconsole", + 2282: "lnvalarm", + 2283: "lnvstatus", + 2284: "lnvmaps", + 2285: "lnvmailmon", + 2286: "nas-metering", + 2287: "dna", + 2288: "netml", + 2289: "dict-lookup", + 2290: "sonus-logging", + 2291: "eapsp", + 2292: "mib-streaming", + 2293: "npdbgmngr", + 2294: "konshus-lm", + 2295: "advant-lm", + 2296: "theta-lm", + 2297: "d2k-datamover1", + 2298: "d2k-datamover2", + 2299: "pc-telecommute", + 2300: "cvmmon", + 2301: "cpq-wbem", + 2302: "binderysupport", + 2303: "proxy-gateway", + 2304: "attachmate-uts", + 2305: "mt-scaleserver", + 2306: "tappi-boxnet", + 2307: "pehelp", + 2308: "sdhelp", + 2309: "sdserver", + 2310: "sdclient", + 2311: "messageservice", + 2312: "wanscaler", + 2313: "iapp", + 2314: "cr-websystems", + 2315: "precise-sft", + 2316: "sent-lm", + 2317: "attachmate-g32", + 2318: "cadencecontrol", + 2319: "infolibria", + 2320: "siebel-ns", + 2321: "rdlap", + 2322: "ofsd", + 2323: "3d-nfsd", + 2324: "cosmocall", + 2325: "ansysli", + 2326: "idcp", + 2327: "xingcsm", + 2328: "netrix-sftm", + 2329: "nvd", + 2330: "tscchat", + 2331: "agentview", + 2332: "rcc-host", + 2333: "snapp", + 2334: "ace-client", + 2335: "ace-proxy", + 2336: "appleugcontrol", + 2337: "ideesrv", + 2338: "norton-lambert", + 2339: "3com-webview", + 2340: "wrs-registry", + 2341: "xiostatus", + 2342: "manage-exec", + 2343: "nati-logos", + 2344: "fcmsys", + 2345: "dbm", + 2346: "redstorm-join", + 2347: "redstorm-find", + 2348: "redstorm-info", + 2349: "redstorm-diag", + 2350: "psbserver", + 2351: "psrserver", + 2352: "pslserver", + 2353: "pspserver", + 2354: "psprserver", + 2355: "psdbserver", + 2356: "gxtelmd", + 2357: "unihub-server", + 2358: "futrix", + 2359: "flukeserver", + 2360: "nexstorindltd", + 2361: "tl1", + 2362: "digiman", + 2363: "mediacntrlnfsd", + 2364: "oi-2000", + 2365: "dbref", + 2366: "qip-login", + 2367: "service-ctrl", + 2368: "opentable", + 2370: "l3-hbmon", + 2371: "hp-rda", + 2372: "lanmessenger", + 2373: "remographlm", + 2374: "hydra", + 2375: "docker", + 2376: "docker-s", + 2377: "swarm", + 2379: "etcd-client", + 2380: "etcd-server", + 2381: "compaq-https", + 2382: "ms-olap3", + 2383: "ms-olap4", + 2384: "sd-request", + 2385: "sd-data", + 2386: "virtualtape", + 2387: "vsamredirector", + 2388: "mynahautostart", + 2389: "ovsessionmgr", + 2390: "rsmtp", + 2391: "3com-net-mgmt", + 2392: "tacticalauth", + 2393: "ms-olap1", + 2394: "ms-olap2", + 2395: "lan900-remote", + 2396: "wusage", + 2397: "ncl", + 2398: "orbiter", + 2399: "fmpro-fdal", + 2400: "opequus-server", + 2401: "cvspserver", + 2402: "taskmaster2000", + 2403: "taskmaster2000", + 2404: "iec-104", + 2405: "trc-netpoll", + 2406: "jediserver", + 2407: "orion", + 2408: "railgun-webaccl", + 2409: "sns-protocol", + 2410: "vrts-registry", + 2411: "netwave-ap-mgmt", + 2412: "cdn", + 2413: "orion-rmi-reg", + 2414: "beeyond", + 2415: "codima-rtp", + 2416: "rmtserver", + 2417: "composit-server", + 2418: "cas", + 2419: "attachmate-s2s", + 2420: "dslremote-mgmt", + 2421: "g-talk", + 2422: "crmsbits", + 2423: "rnrp", + 2424: "kofax-svr", + 2425: "fjitsuappmgr", + 2426: "vcmp", + 2427: "mgcp-gateway", + 2428: "ott", + 2429: "ft-role", + 2430: "venus", + 2431: "venus-se", + 2432: "codasrv", + 2433: "codasrv-se", + 2434: "pxc-epmap", + 2435: "optilogic", + 2436: "topx", + 2437: "unicontrol", + 2438: "msp", + 2439: "sybasedbsynch", + 2440: "spearway", + 2441: "pvsw-inet", + 2442: "netangel", + 2443: "powerclientcsf", + 2444: "btpp2sectrans", + 2445: "dtn1", + 2446: "bues-service", + 2447: "ovwdb", + 2448: "hpppssvr", + 2449: "ratl", + 2450: "netadmin", + 2451: "netchat", + 2452: "snifferclient", + 2453: "madge-ltd", + 2454: "indx-dds", + 2455: "wago-io-system", + 2456: "altav-remmgt", + 2457: "rapido-ip", + 2458: "griffin", + 2459: "community", + 2460: "ms-theater", + 2461: "qadmifoper", + 2462: "qadmifevent", + 2463: "lsi-raid-mgmt", + 2464: "direcpc-si", + 2465: "lbm", + 2466: "lbf", + 2467: "high-criteria", + 2468: "qip-msgd", + 2469: "mti-tcs-comm", + 2470: "taskman-port", + 2471: "seaodbc", + 2472: "c3", + 2473: "aker-cdp", + 2474: "vitalanalysis", + 2475: "ace-server", + 2476: "ace-svr-prop", + 2477: "ssm-cvs", + 2478: "ssm-cssps", + 2479: "ssm-els", + 2480: "powerexchange", + 2481: "giop", + 2482: "giop-ssl", + 2483: "ttc", + 2484: "ttc-ssl", + 2485: "netobjects1", + 2486: "netobjects2", + 2487: "pns", + 2488: "moy-corp", + 2489: "tsilb", + 2490: "qip-qdhcp", + 2491: "conclave-cpp", + 2492: "groove", + 2493: "talarian-mqs", + 2494: "bmc-ar", + 2495: "fast-rem-serv", + 2496: "dirgis", + 2497: "quaddb", + 2498: "odn-castraq", + 2499: "unicontrol", + 2500: "rtsserv", + 2501: "rtsclient", + 2502: "kentrox-prot", + 2503: "nms-dpnss", + 2504: "wlbs", + 2505: "ppcontrol", + 2506: "jbroker", + 2507: "spock", + 2508: "jdatastore", + 2509: "fjmpss", + 2510: "fjappmgrbulk", + 2511: "metastorm", + 2512: "citrixima", + 2513: "citrixadmin", + 2514: "facsys-ntp", + 2515: "facsys-router", + 2516: "maincontrol", + 2517: "call-sig-trans", + 2518: "willy", + 2519: "globmsgsvc", + 2520: "pvsw", + 2521: "adaptecmgr", + 2522: "windb", + 2523: "qke-llc-v3", + 2524: "optiwave-lm", + 2525: "ms-v-worlds", + 2526: "ema-sent-lm", + 2527: "iqserver", + 2528: "ncr-ccl", + 2529: "utsftp", + 2530: "vrcommerce", + 2531: "ito-e-gui", + 2532: "ovtopmd", + 2533: "snifferserver", + 2534: "combox-web-acc", + 2535: "madcap", + 2536: "btpp2audctr1", + 2537: "upgrade", + 2538: "vnwk-prapi", + 2539: "vsiadmin", + 2540: "lonworks", + 2541: "lonworks2", + 2542: "udrawgraph", + 2543: "reftek", + 2544: "novell-zen", + 2545: "sis-emt", + 2546: "vytalvaultbrtp", + 2547: "vytalvaultvsmp", + 2548: "vytalvaultpipe", + 2549: "ipass", + 2550: "ads", + 2551: "isg-uda-server", + 2552: "call-logging", + 2553: "efidiningport", + 2554: "vcnet-link-v10", + 2555: "compaq-wcp", + 2556: "nicetec-nmsvc", + 2557: "nicetec-mgmt", + 2558: "pclemultimedia", + 2559: "lstp", + 2560: "labrat", + 2561: "mosaixcc", + 2562: "delibo", + 2563: "cti-redwood", + 2564: "hp-3000-telnet", + 2565: "coord-svr", + 2566: "pcs-pcw", + 2567: "clp", + 2568: "spamtrap", + 2569: "sonuscallsig", + 2570: "hs-port", + 2571: "cecsvc", + 2572: "ibp", + 2573: "trustestablish", + 2574: "blockade-bpsp", + 2575: "hl7", + 2576: "tclprodebugger", + 2577: "scipticslsrvr", + 2578: "rvs-isdn-dcp", + 2579: "mpfoncl", + 2580: "tributary", + 2581: "argis-te", + 2582: "argis-ds", + 2583: "mon", + 2584: "cyaserv", + 2585: "netx-server", + 2586: "netx-agent", + 2587: "masc", + 2588: "privilege", + 2589: "quartus-tcl", + 2590: "idotdist", + 2591: "maytagshuffle", + 2592: "netrek", + 2593: "mns-mail", + 2594: "dts", + 2595: "worldfusion1", + 2596: "worldfusion2", + 2597: "homesteadglory", + 2598: "citriximaclient", + 2599: "snapd", + 2600: "hpstgmgr", + 2601: "discp-client", + 2602: "discp-server", + 2603: "servicemeter", + 2604: "nsc-ccs", + 2605: "nsc-posa", + 2606: "netmon", + 2607: "connection", + 2608: "wag-service", + 2609: "system-monitor", + 2610: "versa-tek", + 2611: "lionhead", + 2612: "qpasa-agent", + 2613: "smntubootstrap", + 2614: "neveroffline", + 2615: "firepower", + 2616: "appswitch-emp", + 2617: "cmadmin", + 2618: "priority-e-com", + 2619: "bruce", + 2620: "lpsrecommender", + 2621: "miles-apart", + 2622: "metricadbc", + 2623: "lmdp", + 2624: "aria", + 2625: "blwnkl-port", + 2626: "gbjd816", + 2627: "moshebeeri", + 2628: "dict", + 2629: "sitaraserver", + 2630: "sitaramgmt", + 2631: "sitaradir", + 2632: "irdg-post", + 2633: "interintelli", + 2634: "pk-electronics", + 2635: "backburner", + 2636: "solve", + 2637: "imdocsvc", + 2638: "sybaseanywhere", + 2639: "aminet", + 2640: "ami-control", + 2641: "hdl-srv", + 2642: "tragic", + 2643: "gte-samp", + 2644: "travsoft-ipx-t", + 2645: "novell-ipx-cmd", + 2646: "and-lm", + 2647: "syncserver", + 2648: "upsnotifyprot", + 2649: "vpsipport", + 2650: "eristwoguns", + 2651: "ebinsite", + 2652: "interpathpanel", + 2653: "sonus", + 2654: "corel-vncadmin", + 2655: "unglue", + 2656: "kana", + 2657: "sns-dispatcher", + 2658: "sns-admin", + 2659: "sns-query", + 2660: "gcmonitor", + 2661: "olhost", + 2662: "bintec-capi", + 2663: "bintec-tapi", + 2664: "patrol-mq-gm", + 2665: "patrol-mq-nm", + 2666: "extensis", + 2667: "alarm-clock-s", + 2668: "alarm-clock-c", + 2669: "toad", + 2670: "tve-announce", + 2671: "newlixreg", + 2672: "nhserver", + 2673: "firstcall42", + 2674: "ewnn", + 2675: "ttc-etap", + 2676: "simslink", + 2677: "gadgetgate1way", + 2678: "gadgetgate2way", + 2679: "syncserverssl", + 2680: "pxc-sapxom", + 2681: "mpnjsomb", + 2683: "ncdloadbalance", + 2684: "mpnjsosv", + 2685: "mpnjsocl", + 2686: "mpnjsomg", + 2687: "pq-lic-mgmt", + 2688: "md-cg-http", + 2689: "fastlynx", + 2690: "hp-nnm-data", + 2691: "itinternet", + 2692: "admins-lms", + 2694: "pwrsevent", + 2695: "vspread", + 2696: "unifyadmin", + 2697: "oce-snmp-trap", + 2698: "mck-ivpip", + 2699: "csoft-plusclnt", + 2700: "tqdata", + 2701: "sms-rcinfo", + 2702: "sms-xfer", + 2703: "sms-chat", + 2704: "sms-remctrl", + 2705: "sds-admin", + 2706: "ncdmirroring", + 2707: "emcsymapiport", + 2708: "banyan-net", + 2709: "supermon", + 2710: "sso-service", + 2711: "sso-control", + 2712: "aocp", + 2713: "raventbs", + 2714: "raventdm", + 2715: "hpstgmgr2", + 2716: "inova-ip-disco", + 2717: "pn-requester", + 2718: "pn-requester2", + 2719: "scan-change", + 2720: "wkars", + 2721: "smart-diagnose", + 2722: "proactivesrvr", + 2723: "watchdog-nt", + 2724: "qotps", + 2725: "msolap-ptp2", + 2726: "tams", + 2727: "mgcp-callagent", + 2728: "sqdr", + 2729: "tcim-control", + 2730: "nec-raidplus", + 2731: "fyre-messanger", + 2732: "g5m", + 2733: "signet-ctf", + 2734: "ccs-software", + 2735: "netiq-mc", + 2736: "radwiz-nms-srv", + 2737: "srp-feedback", + 2738: "ndl-tcp-ois-gw", + 2739: "tn-timing", + 2740: "alarm", + 2741: "tsb", + 2742: "tsb2", + 2743: "murx", + 2744: "honyaku", + 2745: "urbisnet", + 2746: "cpudpencap", + 2747: "fjippol-swrly", + 2748: "fjippol-polsvr", + 2749: "fjippol-cnsl", + 2750: "fjippol-port1", + 2751: "fjippol-port2", + 2752: "rsisysaccess", + 2753: "de-spot", + 2754: "apollo-cc", + 2755: "expresspay", + 2756: "simplement-tie", + 2757: "cnrp", + 2758: "apollo-status", + 2759: "apollo-gms", + 2760: "sabams", + 2761: "dicom-iscl", + 2762: "dicom-tls", + 2763: "desktop-dna", + 2764: "data-insurance", + 2765: "qip-audup", + 2766: "compaq-scp", + 2767: "uadtc", + 2768: "uacs", + 2769: "exce", + 2770: "veronica", + 2771: "vergencecm", + 2772: "auris", + 2773: "rbakcup1", + 2774: "rbakcup2", + 2775: "smpp", + 2776: "ridgeway1", + 2777: "ridgeway2", + 2778: "gwen-sonya", + 2779: "lbc-sync", + 2780: "lbc-control", + 2781: "whosells", + 2782: "everydayrc", + 2783: "aises", + 2784: "www-dev", + 2785: "aic-np", + 2786: "aic-oncrpc", + 2787: "piccolo", + 2788: "fryeserv", + 2789: "media-agent", + 2790: "plgproxy", + 2791: "mtport-regist", + 2792: "f5-globalsite", + 2793: "initlsmsad", + 2795: "livestats", + 2796: "ac-tech", + 2797: "esp-encap", + 2798: "tmesis-upshot", + 2799: "icon-discover", + 2800: "acc-raid", + 2801: "igcp", + 2802: "veritas-tcp1", + 2803: "btprjctrl", + 2804: "dvr-esm", + 2805: "wta-wsp-s", + 2806: "cspuni", + 2807: "cspmulti", + 2808: "j-lan-p", + 2809: "corbaloc", + 2810: "netsteward", + 2811: "gsiftp", + 2812: "atmtcp", + 2813: "llm-pass", + 2814: "llm-csv", + 2815: "lbc-measure", + 2816: "lbc-watchdog", + 2817: "nmsigport", + 2818: "rmlnk", + 2819: "fc-faultnotify", + 2820: "univision", + 2821: "vrts-at-port", + 2822: "ka0wuc", + 2823: "cqg-netlan", + 2824: "cqg-netlan-1", + 2826: "slc-systemlog", + 2827: "slc-ctrlrloops", + 2828: "itm-lm", + 2829: "silkp1", + 2830: "silkp2", + 2831: "silkp3", + 2832: "silkp4", + 2833: "glishd", + 2834: "evtp", + 2835: "evtp-data", + 2836: "catalyst", + 2837: "repliweb", + 2838: "starbot", + 2839: "nmsigport", + 2840: "l3-exprt", + 2841: "l3-ranger", + 2842: "l3-hawk", + 2843: "pdnet", + 2844: "bpcp-poll", + 2845: "bpcp-trap", + 2846: "aimpp-hello", + 2847: "aimpp-port-req", + 2848: "amt-blc-port", + 2849: "fxp", + 2850: "metaconsole", + 2851: "webemshttp", + 2852: "bears-01", + 2853: "ispipes", + 2854: "infomover", + 2855: "msrp", + 2856: "cesdinv", + 2857: "simctlp", + 2858: "ecnp", + 2859: "activememory", + 2860: "dialpad-voice1", + 2861: "dialpad-voice2", + 2862: "ttg-protocol", + 2863: "sonardata", + 2864: "astromed-main", + 2865: "pit-vpn", + 2866: "iwlistener", + 2867: "esps-portal", + 2868: "npep-messaging", + 2869: "icslap", + 2870: "daishi", + 2871: "msi-selectplay", + 2872: "radix", + 2874: "dxmessagebase1", + 2875: "dxmessagebase2", + 2876: "sps-tunnel", + 2877: "bluelance", + 2878: "aap", + 2879: "ucentric-ds", + 2880: "synapse", + 2881: "ndsp", + 2882: "ndtp", + 2883: "ndnp", + 2884: "flashmsg", + 2885: "topflow", + 2886: "responselogic", + 2887: "aironetddp", + 2888: "spcsdlobby", + 2889: "rsom", + 2890: "cspclmulti", + 2891: "cinegrfx-elmd", + 2892: "snifferdata", + 2893: "vseconnector", + 2894: "abacus-remote", + 2895: "natuslink", + 2896: "ecovisiong6-1", + 2897: "citrix-rtmp", + 2898: "appliance-cfg", + 2899: "powergemplus", + 2900: "quicksuite", + 2901: "allstorcns", + 2902: "netaspi", + 2903: "suitcase", + 2904: "m2ua", + 2905: "m3ua", + 2906: "caller9", + 2907: "webmethods-b2b", + 2908: "mao", + 2909: "funk-dialout", + 2910: "tdaccess", + 2911: "blockade", + 2912: "epicon", + 2913: "boosterware", + 2914: "gamelobby", + 2915: "tksocket", + 2916: "elvin-server", + 2917: "elvin-client", + 2918: "kastenchasepad", + 2919: "roboer", + 2920: "roboeda", + 2921: "cesdcdman", + 2922: "cesdcdtrn", + 2923: "wta-wsp-wtp-s", + 2924: "precise-vip", + 2926: "mobile-file-dl", + 2927: "unimobilectrl", + 2928: "redstone-cpss", + 2929: "amx-webadmin", + 2930: "amx-weblinx", + 2931: "circle-x", + 2932: "incp", + 2933: "4-tieropmgw", + 2934: "4-tieropmcli", + 2935: "qtp", + 2936: "otpatch", + 2937: "pnaconsult-lm", + 2938: "sm-pas-1", + 2939: "sm-pas-2", + 2940: "sm-pas-3", + 2941: "sm-pas-4", + 2942: "sm-pas-5", + 2943: "ttnrepository", + 2944: "megaco-h248", + 2945: "h248-binary", + 2946: "fjsvmpor", + 2947: "gpsd", + 2948: "wap-push", + 2949: "wap-pushsecure", + 2950: "esip", + 2951: "ottp", + 2952: "mpfwsas", + 2953: "ovalarmsrv", + 2954: "ovalarmsrv-cmd", + 2955: "csnotify", + 2956: "ovrimosdbman", + 2957: "jmact5", + 2958: "jmact6", + 2959: "rmopagt", + 2960: "dfoxserver", + 2961: "boldsoft-lm", + 2962: "iph-policy-cli", + 2963: "iph-policy-adm", + 2964: "bullant-srap", + 2965: "bullant-rap", + 2966: "idp-infotrieve", + 2967: "ssc-agent", + 2968: "enpp", + 2969: "essp", + 2970: "index-net", + 2971: "netclip", + 2972: "pmsm-webrctl", + 2973: "svnetworks", + 2974: "signal", + 2975: "fjmpcm", + 2976: "cns-srv-port", + 2977: "ttc-etap-ns", + 2978: "ttc-etap-ds", + 2979: "h263-video", + 2980: "wimd", + 2981: "mylxamport", + 2982: "iwb-whiteboard", + 2983: "netplan", + 2984: "hpidsadmin", + 2985: "hpidsagent", + 2986: "stonefalls", + 2987: "identify", + 2988: "hippad", + 2989: "zarkov", + 2990: "boscap", + 2991: "wkstn-mon", + 2992: "avenyo", + 2993: "veritas-vis1", + 2994: "veritas-vis2", + 2995: "idrs", + 2996: "vsixml", + 2997: "rebol", + 2998: "realsecure", + 2999: "remoteware-un", + 3000: "hbci", + 3001: "origo-native", + 3002: "exlm-agent", + 3003: "cgms", + 3004: "csoftragent", + 3005: "geniuslm", + 3006: "ii-admin", + 3007: "lotusmtap", + 3008: "midnight-tech", + 3009: "pxc-ntfy", + 3010: "gw", + 3011: "trusted-web", + 3012: "twsdss", + 3013: "gilatskysurfer", + 3014: "broker-service", + 3015: "nati-dstp", + 3016: "notify-srvr", + 3017: "event-listener", + 3018: "srvc-registry", + 3019: "resource-mgr", + 3020: "cifs", + 3021: "agriserver", + 3022: "csregagent", + 3023: "magicnotes", + 3024: "nds-sso", + 3025: "arepa-raft", + 3026: "agri-gateway", + 3027: "LiebDevMgmt-C", + 3028: "LiebDevMgmt-DM", + 3029: "LiebDevMgmt-A", + 3030: "arepa-cas", + 3031: "eppc", + 3032: "redwood-chat", + 3033: "pdb", + 3034: "osmosis-aeea", + 3035: "fjsv-gssagt", + 3036: "hagel-dump", + 3037: "hp-san-mgmt", + 3038: "santak-ups", + 3039: "cogitate", + 3040: "tomato-springs", + 3041: "di-traceware", + 3042: "journee", + 3043: "brp", + 3044: "epp", + 3045: "responsenet", + 3046: "di-ase", + 3047: "hlserver", + 3048: "pctrader", + 3049: "nsws", + 3050: "gds-db", + 3051: "galaxy-server", + 3052: "apc-3052", + 3053: "dsom-server", + 3054: "amt-cnf-prot", + 3055: "policyserver", + 3056: "cdl-server", + 3057: "goahead-fldup", + 3058: "videobeans", + 3059: "qsoft", + 3060: "interserver", + 3061: "cautcpd", + 3062: "ncacn-ip-tcp", + 3063: "ncadg-ip-udp", + 3064: "rprt", + 3065: "slinterbase", + 3066: "netattachsdmp", + 3067: "fjhpjp", + 3068: "ls3bcast", + 3069: "ls3", + 3070: "mgxswitch", + 3071: "xplat-replicate", + 3072: "csd-monitor", + 3073: "vcrp", + 3074: "xbox", + 3075: "orbix-locator", + 3076: "orbix-config", + 3077: "orbix-loc-ssl", + 3078: "orbix-cfg-ssl", + 3079: "lv-frontpanel", + 3080: "stm-pproc", + 3081: "tl1-lv", + 3082: "tl1-raw", + 3083: "tl1-telnet", + 3084: "itm-mccs", + 3085: "pcihreq", + 3086: "jdl-dbkitchen", + 3087: "asoki-sma", + 3088: "xdtp", + 3089: "ptk-alink", + 3090: "stss", + 3091: "1ci-smcs", + 3093: "rapidmq-center", + 3094: "rapidmq-reg", + 3095: "panasas", + 3096: "ndl-aps", + 3098: "umm-port", + 3099: "chmd", + 3100: "opcon-xps", + 3101: "hp-pxpib", + 3102: "slslavemon", + 3103: "autocuesmi", + 3104: "autocuelog", + 3105: "cardbox", + 3106: "cardbox-http", + 3107: "business", + 3108: "geolocate", + 3109: "personnel", + 3110: "sim-control", + 3111: "wsynch", + 3112: "ksysguard", + 3113: "cs-auth-svr", + 3114: "ccmad", + 3115: "mctet-master", + 3116: "mctet-gateway", + 3117: "mctet-jserv", + 3118: "pkagent", + 3119: "d2000kernel", + 3120: "d2000webserver", + 3121: "pcmk-remote", + 3122: "vtr-emulator", + 3123: "edix", + 3124: "beacon-port", + 3125: "a13-an", + 3127: "ctx-bridge", + 3128: "ndl-aas", + 3129: "netport-id", + 3130: "icpv2", + 3131: "netbookmark", + 3132: "ms-rule-engine", + 3133: "prism-deploy", + 3134: "ecp", + 3135: "peerbook-port", + 3136: "grubd", + 3137: "rtnt-1", + 3138: "rtnt-2", + 3139: "incognitorv", + 3140: "ariliamulti", + 3141: "vmodem", + 3142: "rdc-wh-eos", + 3143: "seaview", + 3144: "tarantella", + 3145: "csi-lfap", + 3146: "bears-02", + 3147: "rfio", + 3148: "nm-game-admin", + 3149: "nm-game-server", + 3150: "nm-asses-admin", + 3151: "nm-assessor", + 3152: "feitianrockey", + 3153: "s8-client-port", + 3154: "ccmrmi", + 3155: "jpegmpeg", + 3156: "indura", + 3157: "e3consultants", + 3158: "stvp", + 3159: "navegaweb-port", + 3160: "tip-app-server", + 3161: "doc1lm", + 3162: "sflm", + 3163: "res-sap", + 3164: "imprs", + 3165: "newgenpay", + 3166: "sossecollector", + 3167: "nowcontact", + 3168: "poweronnud", + 3169: "serverview-as", + 3170: "serverview-asn", + 3171: "serverview-gf", + 3172: "serverview-rm", + 3173: "serverview-icc", + 3174: "armi-server", + 3175: "t1-e1-over-ip", + 3176: "ars-master", + 3177: "phonex-port", + 3178: "radclientport", + 3179: "h2gf-w-2m", + 3180: "mc-brk-srv", + 3181: "bmcpatrolagent", + 3182: "bmcpatrolrnvu", + 3183: "cops-tls", + 3184: "apogeex-port", + 3185: "smpppd", + 3186: "iiw-port", + 3187: "odi-port", + 3188: "brcm-comm-port", + 3189: "pcle-infex", + 3190: "csvr-proxy", + 3191: "csvr-sslproxy", + 3192: "firemonrcc", + 3193: "spandataport", + 3194: "magbind", + 3195: "ncu-1", + 3196: "ncu-2", + 3197: "embrace-dp-s", + 3198: "embrace-dp-c", + 3199: "dmod-workspace", + 3200: "tick-port", + 3201: "cpq-tasksmart", + 3202: "intraintra", + 3203: "netwatcher-mon", + 3204: "netwatcher-db", + 3205: "isns", + 3206: "ironmail", + 3207: "vx-auth-port", + 3208: "pfu-prcallback", + 3209: "netwkpathengine", + 3210: "flamenco-proxy", + 3211: "avsecuremgmt", + 3212: "surveyinst", + 3213: "neon24x7", + 3214: "jmq-daemon-1", + 3215: "jmq-daemon-2", + 3216: "ferrari-foam", + 3217: "unite", + 3218: "smartpackets", + 3219: "wms-messenger", + 3220: "xnm-ssl", + 3221: "xnm-clear-text", + 3222: "glbp", + 3223: "digivote", + 3224: "aes-discovery", + 3225: "fcip-port", + 3226: "isi-irp", + 3227: "dwnmshttp", + 3228: "dwmsgserver", + 3229: "global-cd-port", + 3230: "sftdst-port", + 3231: "vidigo", + 3232: "mdtp", + 3233: "whisker", + 3234: "alchemy", + 3235: "mdap-port", + 3236: "apparenet-ts", + 3237: "apparenet-tps", + 3238: "apparenet-as", + 3239: "apparenet-ui", + 3240: "triomotion", + 3241: "sysorb", + 3242: "sdp-id-port", + 3243: "timelot", + 3244: "onesaf", + 3245: "vieo-fe", + 3246: "dvt-system", + 3247: "dvt-data", + 3248: "procos-lm", + 3249: "ssp", + 3250: "hicp", + 3251: "sysscanner", + 3252: "dhe", + 3253: "pda-data", + 3254: "pda-sys", + 3255: "semaphore", + 3256: "cpqrpm-agent", + 3257: "cpqrpm-server", + 3258: "ivecon-port", + 3259: "epncdp2", + 3260: "iscsi-target", + 3261: "winshadow", + 3262: "necp", + 3263: "ecolor-imager", + 3264: "ccmail", + 3265: "altav-tunnel", + 3266: "ns-cfg-server", + 3267: "ibm-dial-out", + 3268: "msft-gc", + 3269: "msft-gc-ssl", + 3270: "verismart", + 3271: "csoft-prev", + 3272: "user-manager", + 3273: "sxmp", + 3274: "ordinox-server", + 3275: "samd", + 3276: "maxim-asics", + 3277: "awg-proxy", + 3278: "lkcmserver", + 3279: "admind", + 3280: "vs-server", + 3281: "sysopt", + 3282: "datusorb", + 3283: "Apple Remote Desktop (Net Assistant)", + 3284: "4talk", + 3285: "plato", + 3286: "e-net", + 3287: "directvdata", + 3288: "cops", + 3289: "enpc", + 3290: "caps-lm", + 3291: "sah-lm", + 3292: "cart-o-rama", + 3293: "fg-fps", + 3294: "fg-gip", + 3295: "dyniplookup", + 3296: "rib-slm", + 3297: "cytel-lm", + 3298: "deskview", + 3299: "pdrncs", + 3300: "ceph", + 3302: "mcs-fastmail", + 3303: "opsession-clnt", + 3304: "opsession-srvr", + 3305: "odette-ftp", + 3306: "mysql", + 3307: "opsession-prxy", + 3308: "tns-server", + 3309: "tns-adv", + 3310: "dyna-access", + 3311: "mcns-tel-ret", + 3312: "appman-server", + 3313: "uorb", + 3314: "uohost", + 3315: "cdid", + 3316: "aicc-cmi", + 3317: "vsaiport", + 3318: "ssrip", + 3319: "sdt-lmd", + 3320: "officelink2000", + 3321: "vnsstr", + 3326: "sftu", + 3327: "bbars", + 3328: "egptlm", + 3329: "hp-device-disc", + 3330: "mcs-calypsoicf", + 3331: "mcs-messaging", + 3332: "mcs-mailsvr", + 3333: "dec-notes", + 3334: "directv-web", + 3335: "directv-soft", + 3336: "directv-tick", + 3337: "directv-catlg", + 3338: "anet-b", + 3339: "anet-l", + 3340: "anet-m", + 3341: "anet-h", + 3342: "webtie", + 3343: "ms-cluster-net", + 3344: "bnt-manager", + 3345: "influence", + 3346: "trnsprntproxy", + 3347: "phoenix-rpc", + 3348: "pangolin-laser", + 3349: "chevinservices", + 3350: "findviatv", + 3351: "btrieve", + 3352: "ssql", + 3353: "fatpipe", + 3354: "suitjd", + 3355: "ordinox-dbase", + 3356: "upnotifyps", + 3357: "adtech-test", + 3358: "mpsysrmsvr", + 3359: "wg-netforce", + 3360: "kv-server", + 3361: "kv-agent", + 3362: "dj-ilm", + 3363: "nati-vi-server", + 3364: "creativeserver", + 3365: "contentserver", + 3366: "creativepartnr", + 3372: "tip2", + 3373: "lavenir-lm", + 3374: "cluster-disc", + 3375: "vsnm-agent", + 3376: "cdbroker", + 3377: "cogsys-lm", + 3378: "wsicopy", + 3379: "socorfs", + 3380: "sns-channels", + 3381: "geneous", + 3382: "fujitsu-neat", + 3383: "esp-lm", + 3384: "hp-clic", + 3385: "qnxnetman", + 3386: "gprs-data", + 3387: "backroomnet", + 3388: "cbserver", + 3389: "ms-wbt-server", + 3390: "dsc", + 3391: "savant", + 3392: "efi-lm", + 3393: "d2k-tapestry1", + 3394: "d2k-tapestry2", + 3395: "dyna-lm", + 3396: "printer-agent", + 3397: "cloanto-lm", + 3398: "mercantile", + 3399: "csms", + 3400: "csms2", + 3401: "filecast", + 3402: "fxaengine-net", + 3405: "nokia-ann-ch1", + 3406: "nokia-ann-ch2", + 3407: "ldap-admin", + 3408: "BESApi", + 3409: "networklens", + 3410: "networklenss", + 3411: "biolink-auth", + 3412: "xmlblaster", + 3413: "svnet", + 3414: "wip-port", + 3415: "bcinameservice", + 3416: "commandport", + 3417: "csvr", + 3418: "rnmap", + 3419: "softaudit", + 3420: "ifcp-port", + 3421: "bmap", + 3422: "rusb-sys-port", + 3423: "xtrm", + 3424: "xtrms", + 3425: "agps-port", + 3426: "arkivio", + 3427: "websphere-snmp", + 3428: "twcss", + 3429: "gcsp", + 3430: "ssdispatch", + 3431: "ndl-als", + 3432: "osdcp", + 3433: "opnet-smp", + 3434: "opencm", + 3435: "pacom", + 3436: "gc-config", + 3437: "autocueds", + 3438: "spiral-admin", + 3439: "hri-port", + 3440: "ans-console", + 3441: "connect-client", + 3442: "connect-server", + 3443: "ov-nnm-websrv", + 3444: "denali-server", + 3445: "monp", + 3446: "3comfaxrpc", + 3447: "directnet", + 3448: "dnc-port", + 3449: "hotu-chat", + 3450: "castorproxy", + 3451: "asam", + 3452: "sabp-signal", + 3453: "pscupd", + 3454: "mira", + 3455: "prsvp", + 3456: "vat", + 3457: "vat-control", + 3458: "d3winosfi", + 3459: "integral", + 3460: "edm-manager", + 3461: "edm-stager", + 3462: "edm-std-notify", + 3463: "edm-adm-notify", + 3464: "edm-mgr-sync", + 3465: "edm-mgr-cntrl", + 3466: "workflow", + 3467: "rcst", + 3468: "ttcmremotectrl", + 3469: "pluribus", + 3470: "jt400", + 3471: "jt400-ssl", + 3472: "jaugsremotec-1", + 3473: "jaugsremotec-2", + 3474: "ttntspauto", + 3475: "genisar-port", + 3476: "nppmp", + 3477: "ecomm", + 3478: "stun", + 3479: "twrpc", + 3480: "plethora", + 3481: "cleanerliverc", + 3482: "vulture", + 3483: "slim-devices", + 3484: "gbs-stp", + 3485: "celatalk", + 3486: "ifsf-hb-port", + 3487: "ltctcp", + 3488: "fs-rh-srv", + 3489: "dtp-dia", + 3490: "colubris", + 3491: "swr-port", + 3492: "tvdumtray-port", + 3493: "nut", + 3494: "ibm3494", + 3495: "seclayer-tcp", + 3496: "seclayer-tls", + 3497: "ipether232port", + 3498: "dashpas-port", + 3499: "sccip-media", + 3500: "rtmp-port", + 3501: "isoft-p2p", + 3502: "avinstalldisc", + 3503: "lsp-ping", + 3504: "ironstorm", + 3505: "ccmcomm", + 3506: "apc-3506", + 3507: "nesh-broker", + 3508: "interactionweb", + 3509: "vt-ssl", + 3510: "xss-port", + 3511: "webmail-2", + 3512: "aztec", + 3513: "arcpd", + 3514: "must-p2p", + 3515: "must-backplane", + 3516: "smartcard-port", + 3517: "802-11-iapp", + 3518: "artifact-msg", + 3519: "nvmsgd", + 3520: "galileolog", + 3521: "mc3ss", + 3522: "nssocketport", + 3523: "odeumservlink", + 3524: "ecmport", + 3525: "eisport", + 3526: "starquiz-port", + 3527: "beserver-msg-q", + 3528: "jboss-iiop", + 3529: "jboss-iiop-ssl", + 3530: "gf", + 3531: "joltid", + 3532: "raven-rmp", + 3533: "raven-rdp", + 3534: "urld-port", + 3535: "ms-la", + 3536: "snac", + 3537: "ni-visa-remote", + 3538: "ibm-diradm", + 3539: "ibm-diradm-ssl", + 3540: "pnrp-port", + 3541: "voispeed-port", + 3542: "hacl-monitor", + 3543: "qftest-lookup", + 3544: "teredo", + 3545: "camac", + 3547: "symantec-sim", + 3548: "interworld", + 3549: "tellumat-nms", + 3550: "ssmpp", + 3551: "apcupsd", + 3552: "taserver", + 3553: "rbr-discovery", + 3554: "questnotify", + 3555: "razor", + 3556: "sky-transport", + 3557: "personalos-001", + 3558: "mcp-port", + 3559: "cctv-port", + 3560: "iniserve-port", + 3561: "bmc-onekey", + 3562: "sdbproxy", + 3563: "watcomdebug", + 3564: "esimport", + 3565: "m2pa", + 3566: "quest-data-hub", + 3567: "dof-eps", + 3568: "dof-tunnel-sec", + 3569: "mbg-ctrl", + 3570: "mccwebsvr-port", + 3571: "megardsvr-port", + 3572: "megaregsvrport", + 3573: "tag-ups-1", + 3574: "dmaf-server", + 3575: "ccm-port", + 3576: "cmc-port", + 3577: "config-port", + 3578: "data-port", + 3579: "ttat3lb", + 3580: "nati-svrloc", + 3581: "kfxaclicensing", + 3582: "press", + 3583: "canex-watch", + 3584: "u-dbap", + 3585: "emprise-lls", + 3586: "emprise-lsc", + 3587: "p2pgroup", + 3588: "sentinel", + 3589: "isomair", + 3590: "wv-csp-sms", + 3591: "gtrack-server", + 3592: "gtrack-ne", + 3593: "bpmd", + 3594: "mediaspace", + 3595: "shareapp", + 3596: "iw-mmogame", + 3597: "a14", + 3598: "a15", + 3599: "quasar-server", + 3600: "trap-daemon", + 3601: "visinet-gui", + 3602: "infiniswitchcl", + 3603: "int-rcv-cntrl", + 3604: "bmc-jmx-port", + 3605: "comcam-io", + 3606: "splitlock", + 3607: "precise-i3", + 3608: "trendchip-dcp", + 3609: "cpdi-pidas-cm", + 3610: "echonet", + 3611: "six-degrees", + 3612: "hp-dataprotect", + 3613: "alaris-disc", + 3614: "sigma-port", + 3615: "start-network", + 3616: "cd3o-protocol", + 3617: "sharp-server", + 3618: "aairnet-1", + 3619: "aairnet-2", + 3620: "ep-pcp", + 3621: "ep-nsp", + 3622: "ff-lr-port", + 3623: "haipe-discover", + 3624: "dist-upgrade", + 3625: "volley", + 3626: "bvcdaemon-port", + 3627: "jamserverport", + 3628: "ept-machine", + 3629: "escvpnet", + 3630: "cs-remote-db", + 3631: "cs-services", + 3632: "distcc", + 3633: "wacp", + 3634: "hlibmgr", + 3635: "sdo", + 3636: "servistaitsm", + 3637: "scservp", + 3638: "ehp-backup", + 3639: "xap-ha", + 3640: "netplay-port1", + 3641: "netplay-port2", + 3642: "juxml-port", + 3643: "audiojuggler", + 3644: "ssowatch", + 3645: "cyc", + 3646: "xss-srv-port", + 3647: "splitlock-gw", + 3648: "fjcp", + 3649: "nmmp", + 3650: "prismiq-plugin", + 3651: "xrpc-registry", + 3652: "vxcrnbuport", + 3653: "tsp", + 3654: "vaprtm", + 3655: "abatemgr", + 3656: "abatjss", + 3657: "immedianet-bcn", + 3658: "ps-ams", + 3659: "apple-sasl", + 3660: "can-nds-ssl", + 3661: "can-ferret-ssl", + 3662: "pserver", + 3663: "dtp", + 3664: "ups-engine", + 3665: "ent-engine", + 3666: "eserver-pap", + 3667: "infoexch", + 3668: "dell-rm-port", + 3669: "casanswmgmt", + 3670: "smile", + 3671: "efcp", + 3672: "lispworks-orb", + 3673: "mediavault-gui", + 3674: "wininstall-ipc", + 3675: "calltrax", + 3676: "va-pacbase", + 3677: "roverlog", + 3678: "ipr-dglt", + 3679: "Escale (Newton Dock)", + 3680: "npds-tracker", + 3681: "bts-x73", + 3682: "cas-mapi", + 3683: "bmc-ea", + 3684: "faxstfx-port", + 3685: "dsx-agent", + 3686: "tnmpv2", + 3687: "simple-push", + 3688: "simple-push-s", + 3689: "daap", + 3690: "svn", + 3691: "magaya-network", + 3692: "intelsync", + 3693: "easl", + 3695: "bmc-data-coll", + 3696: "telnetcpcd", + 3697: "nw-license", + 3698: "sagectlpanel", + 3699: "kpn-icw", + 3700: "lrs-paging", + 3701: "netcelera", + 3702: "ws-discovery", + 3703: "adobeserver-3", + 3704: "adobeserver-4", + 3705: "adobeserver-5", + 3706: "rt-event", + 3707: "rt-event-s", + 3708: "sun-as-iiops", + 3709: "ca-idms", + 3710: "portgate-auth", + 3711: "edb-server2", + 3712: "sentinel-ent", + 3713: "tftps", + 3714: "delos-dms", + 3715: "anoto-rendezv", + 3716: "wv-csp-sms-cir", + 3717: "wv-csp-udp-cir", + 3718: "opus-services", + 3719: "itelserverport", + 3720: "ufastro-instr", + 3721: "xsync", + 3722: "xserveraid", + 3723: "sychrond", + 3724: "blizwow", + 3725: "na-er-tip", + 3726: "array-manager", + 3727: "e-mdu", + 3728: "e-woa", + 3729: "fksp-audit", + 3730: "client-ctrl", + 3731: "smap", + 3732: "m-wnn", + 3733: "multip-msg", + 3734: "synel-data", + 3735: "pwdis", + 3736: "rs-rmi", + 3737: "xpanel", + 3738: "versatalk", + 3739: "launchbird-lm", + 3740: "heartbeat", + 3741: "wysdma", + 3742: "cst-port", + 3743: "ipcs-command", + 3744: "sasg", + 3745: "gw-call-port", + 3746: "linktest", + 3747: "linktest-s", + 3748: "webdata", + 3749: "cimtrak", + 3750: "cbos-ip-port", + 3751: "gprs-cube", + 3752: "vipremoteagent", + 3753: "nattyserver", + 3754: "timestenbroker", + 3755: "sas-remote-hlp", + 3756: "canon-capt", + 3757: "grf-port", + 3758: "apw-registry", + 3759: "exapt-lmgr", + 3760: "adtempusclient", + 3761: "gsakmp", + 3762: "gbs-smp", + 3763: "xo-wave", + 3764: "mni-prot-rout", + 3765: "rtraceroute", + 3766: "sitewatch-s", + 3767: "listmgr-port", + 3768: "rblcheckd", + 3769: "haipe-otnk", + 3770: "cindycollab", + 3771: "paging-port", + 3772: "ctp", + 3773: "ctdhercules", + 3774: "zicom", + 3775: "ispmmgr", + 3776: "dvcprov-port", + 3777: "jibe-eb", + 3778: "c-h-it-port", + 3779: "cognima", + 3780: "nnp", + 3781: "abcvoice-port", + 3782: "iso-tp0s", + 3783: "bim-pem", + 3784: "bfd-control", + 3785: "bfd-echo", + 3786: "upstriggervsw", + 3787: "fintrx", + 3788: "isrp-port", + 3789: "remotedeploy", + 3790: "quickbooksrds", + 3791: "tvnetworkvideo", + 3792: "sitewatch", + 3793: "dcsoftware", + 3794: "jaus", + 3795: "myblast", + 3796: "spw-dialer", + 3797: "idps", + 3798: "minilock", + 3799: "radius-dynauth", + 3800: "pwgpsi", + 3801: "ibm-mgr", + 3802: "vhd", + 3803: "soniqsync", + 3804: "iqnet-port", + 3805: "tcpdataserver", + 3806: "wsmlb", + 3807: "spugna", + 3808: "sun-as-iiops-ca", + 3809: "apocd", + 3810: "wlanauth", + 3811: "amp", + 3812: "neto-wol-server", + 3813: "rap-ip", + 3814: "neto-dcs", + 3815: "lansurveyorxml", + 3816: "sunlps-http", + 3817: "tapeware", + 3818: "crinis-hb", + 3819: "epl-slp", + 3820: "scp", + 3821: "pmcp", + 3822: "acp-discovery", + 3823: "acp-conduit", + 3824: "acp-policy", + 3825: "ffserver", + 3826: "warmux", + 3827: "netmpi", + 3828: "neteh", + 3829: "neteh-ext", + 3830: "cernsysmgmtagt", + 3831: "dvapps", + 3832: "xxnetserver", + 3833: "aipn-auth", + 3834: "spectardata", + 3835: "spectardb", + 3836: "markem-dcp", + 3837: "mkm-discovery", + 3838: "sos", + 3839: "amx-rms", + 3840: "flirtmitmir", + 3841: "shiprush-db-svr", + 3842: "nhci", + 3843: "quest-agent", + 3844: "rnm", + 3845: "v-one-spp", + 3846: "an-pcp", + 3847: "msfw-control", + 3848: "item", + 3849: "spw-dnspreload", + 3850: "qtms-bootstrap", + 3851: "spectraport", + 3852: "sse-app-config", + 3853: "sscan", + 3854: "stryker-com", + 3855: "opentrac", + 3856: "informer", + 3857: "trap-port", + 3858: "trap-port-mom", + 3859: "nav-port", + 3860: "sasp", + 3861: "winshadow-hd", + 3862: "giga-pocket", + 3863: "asap-tcp", + 3864: "asap-tcp-tls", + 3865: "xpl", + 3866: "dzdaemon", + 3867: "dzoglserver", + 3868: "diameter", + 3869: "ovsam-mgmt", + 3870: "ovsam-d-agent", + 3871: "avocent-adsap", + 3872: "oem-agent", + 3873: "fagordnc", + 3874: "sixxsconfig", + 3875: "pnbscada", + 3876: "dl-agent", + 3877: "xmpcr-interface", + 3878: "fotogcad", + 3879: "appss-lm", + 3880: "igrs", + 3881: "idac", + 3882: "msdts1", + 3883: "vrpn", + 3884: "softrack-meter", + 3885: "topflow-ssl", + 3886: "nei-management", + 3887: "ciphire-data", + 3888: "ciphire-serv", + 3889: "dandv-tester", + 3890: "ndsconnect", + 3891: "rtc-pm-port", + 3892: "pcc-image-port", + 3893: "cgi-starapi", + 3894: "syam-agent", + 3895: "syam-smc", + 3896: "sdo-tls", + 3897: "sdo-ssh", + 3898: "senip", + 3899: "itv-control", + 3900: "udt-os", + 3901: "nimsh", + 3902: "nimaux", + 3903: "charsetmgr", + 3904: "omnilink-port", + 3905: "mupdate", + 3906: "topovista-data", + 3907: "imoguia-port", + 3908: "hppronetman", + 3909: "surfcontrolcpa", + 3910: "prnrequest", + 3911: "prnstatus", + 3912: "gbmt-stars", + 3913: "listcrt-port", + 3914: "listcrt-port-2", + 3915: "agcat", + 3916: "wysdmc", + 3917: "aftmux", + 3918: "pktcablemmcops", + 3919: "hyperip", + 3920: "exasoftport1", + 3921: "herodotus-net", + 3922: "sor-update", + 3923: "symb-sb-port", + 3924: "mpl-gprs-port", + 3925: "zmp", + 3926: "winport", + 3927: "natdataservice", + 3928: "netboot-pxe", + 3929: "smauth-port", + 3930: "syam-webserver", + 3931: "msr-plugin-port", + 3932: "dyn-site", + 3933: "plbserve-port", + 3934: "sunfm-port", + 3935: "sdp-portmapper", + 3936: "mailprox", + 3937: "dvbservdsc", + 3938: "dbcontrol-agent", + 3939: "aamp", + 3940: "xecp-node", + 3941: "homeportal-web", + 3942: "srdp", + 3943: "tig", + 3944: "sops", + 3945: "emcads", + 3946: "backupedge", + 3947: "ccp", + 3948: "apdap", + 3949: "drip", + 3950: "namemunge", + 3951: "pwgippfax", + 3952: "i3-sessionmgr", + 3953: "xmlink-connect", + 3954: "adrep", + 3955: "p2pcommunity", + 3956: "gvcp", + 3957: "mqe-broker", + 3958: "mqe-agent", + 3959: "treehopper", + 3960: "bess", + 3961: "proaxess", + 3962: "sbi-agent", + 3963: "thrp", + 3964: "sasggprs", + 3965: "ati-ip-to-ncpe", + 3966: "bflckmgr", + 3967: "ppsms", + 3968: "ianywhere-dbns", + 3969: "landmarks", + 3970: "lanrevagent", + 3971: "lanrevserver", + 3972: "iconp", + 3973: "progistics", + 3974: "citysearch", + 3975: "airshot", + 3976: "opswagent", + 3977: "opswmanager", + 3978: "secure-cfg-svr", + 3979: "smwan", + 3980: "acms", + 3981: "starfish", + 3982: "eis", + 3983: "eisp", + 3984: "mapper-nodemgr", + 3985: "mapper-mapethd", + 3986: "mapper-ws-ethd", + 3987: "centerline", + 3988: "dcs-config", + 3989: "bv-queryengine", + 3990: "bv-is", + 3991: "bv-smcsrv", + 3992: "bv-ds", + 3993: "bv-agent", + 3995: "iss-mgmt-ssl", + 3996: "abcsoftware", + 3997: "agentsease-db", + 3998: "dnx", + 3999: "nvcnet", + 4000: "terabase", + 4001: "newoak", + 4002: "pxc-spvr-ft", + 4003: "pxc-splr-ft", + 4004: "pxc-roid", + 4005: "pxc-pin", + 4006: "pxc-spvr", + 4007: "pxc-splr", + 4008: "netcheque", + 4009: "chimera-hwm", + 4010: "samsung-unidex", + 4011: "altserviceboot", + 4012: "pda-gate", + 4013: "acl-manager", + 4014: "taiclock", + 4015: "talarian-mcast1", + 4016: "talarian-mcast2", + 4017: "talarian-mcast3", + 4018: "talarian-mcast4", + 4019: "talarian-mcast5", + 4020: "trap", + 4021: "nexus-portal", + 4022: "dnox", + 4023: "esnm-zoning", + 4024: "tnp1-port", + 4025: "partimage", + 4026: "as-debug", + 4027: "bxp", + 4028: "dtserver-port", + 4029: "ip-qsig", + 4030: "jdmn-port", + 4031: "suucp", + 4032: "vrts-auth-port", + 4033: "sanavigator", + 4034: "ubxd", + 4035: "wap-push-http", + 4036: "wap-push-https", + 4037: "ravehd", + 4038: "fazzt-ptp", + 4039: "fazzt-admin", + 4040: "yo-main", + 4041: "houston", + 4042: "ldxp", + 4043: "nirp", + 4044: "ltp", + 4045: "npp", + 4046: "acp-proto", + 4047: "ctp-state", + 4049: "wafs", + 4050: "cisco-wafs", + 4051: "cppdp", + 4052: "interact", + 4053: "ccu-comm-1", + 4054: "ccu-comm-2", + 4055: "ccu-comm-3", + 4056: "lms", + 4057: "wfm", + 4058: "kingfisher", + 4059: "dlms-cosem", + 4060: "dsmeter-iatc", + 4061: "ice-location", + 4062: "ice-slocation", + 4063: "ice-router", + 4064: "ice-srouter", + 4065: "avanti-cdp", + 4066: "pmas", + 4067: "idp", + 4068: "ipfltbcst", + 4069: "minger", + 4070: "tripe", + 4071: "aibkup", + 4072: "zieto-sock", + 4073: "iRAPP", + 4074: "cequint-cityid", + 4075: "perimlan", + 4076: "seraph", + 4078: "cssp", + 4079: "santools", + 4080: "lorica-in", + 4081: "lorica-in-sec", + 4082: "lorica-out", + 4083: "lorica-out-sec", + 4085: "ezmessagesrv", + 4087: "applusservice", + 4088: "npsp", + 4089: "opencore", + 4090: "omasgport", + 4091: "ewinstaller", + 4092: "ewdgs", + 4093: "pvxpluscs", + 4094: "sysrqd", + 4095: "xtgui", + 4096: "bre", + 4097: "patrolview", + 4098: "drmsfsd", + 4099: "dpcp", + 4100: "igo-incognito", + 4101: "brlp-0", + 4102: "brlp-1", + 4103: "brlp-2", + 4104: "brlp-3", + 4105: "shofar", + 4106: "synchronite", + 4107: "j-ac", + 4108: "accel", + 4109: "izm", + 4110: "g2tag", + 4111: "xgrid", + 4112: "apple-vpns-rp", + 4113: "aipn-reg", + 4114: "jomamqmonitor", + 4115: "cds", + 4116: "smartcard-tls", + 4117: "hillrserv", + 4118: "netscript", + 4119: "assuria-slm", + 4120: "minirem", + 4121: "e-builder", + 4122: "fprams", + 4123: "z-wave", + 4124: "tigv2", + 4125: "opsview-envoy", + 4126: "ddrepl", + 4127: "unikeypro", + 4128: "nufw", + 4129: "nuauth", + 4130: "fronet", + 4131: "stars", + 4132: "nuts-dem", + 4133: "nuts-bootp", + 4134: "nifty-hmi", + 4135: "cl-db-attach", + 4136: "cl-db-request", + 4137: "cl-db-remote", + 4138: "nettest", + 4139: "thrtx", + 4140: "cedros-fds", + 4141: "oirtgsvc", + 4142: "oidocsvc", + 4143: "oidsr", + 4145: "vvr-control", + 4146: "tgcconnect", + 4147: "vrxpservman", + 4148: "hhb-handheld", + 4149: "agslb", + 4150: "PowerAlert-nsa", + 4151: "menandmice-noh", + 4152: "idig-mux", + 4153: "mbl-battd", + 4154: "atlinks", + 4155: "bzr", + 4156: "stat-results", + 4157: "stat-scanner", + 4158: "stat-cc", + 4159: "nss", + 4160: "jini-discovery", + 4161: "omscontact", + 4162: "omstopology", + 4163: "silverpeakpeer", + 4164: "silverpeakcomm", + 4165: "altcp", + 4166: "joost", + 4167: "ddgn", + 4168: "pslicser", + 4169: "iadt", + 4170: "d-cinema-csp", + 4171: "ml-svnet", + 4172: "pcoip", + 4174: "smcluster", + 4175: "bccp", + 4176: "tl-ipcproxy", + 4177: "wello", + 4178: "storman", + 4179: "MaxumSP", + 4180: "httpx", + 4181: "macbak", + 4182: "pcptcpservice", + 4183: "cyborgnet", + 4184: "universe-suite", + 4185: "wcpp", + 4186: "boxbackupstore", + 4187: "csc-proxy", + 4188: "vatata", + 4189: "pcep", + 4190: "sieve", + 4192: "azeti", + 4193: "pvxplusio", + 4197: "hctl", + 4199: "eims-admin", + 4300: "corelccam", + 4301: "d-data", + 4302: "d-data-control", + 4303: "srcp", + 4304: "owserver", + 4305: "batman", + 4306: "pinghgl", + 4307: "trueconf", + 4308: "compx-lockview", + 4309: "dserver", + 4310: "mirrtex", + 4311: "p6ssmc", + 4312: "pscl-mgt", + 4313: "perrla", + 4314: "choiceview-agt", + 4316: "choiceview-clt", + 4320: "fdt-rcatp", + 4321: "rwhois", + 4322: "trim-event", + 4323: "trim-ice", + 4325: "geognosisman", + 4326: "geognosis", + 4327: "jaxer-web", + 4328: "jaxer-manager", + 4329: "publiqare-sync", + 4330: "dey-sapi", + 4331: "ktickets-rest", + 4333: "ahsp", + 4334: "netconf-ch-ssh", + 4335: "netconf-ch-tls", + 4336: "restconf-ch-tls", + 4340: "gaia", + 4341: "lisp-data", + 4342: "lisp-cons", + 4343: "unicall", + 4344: "vinainstall", + 4345: "m4-network-as", + 4346: "elanlm", + 4347: "lansurveyor", + 4348: "itose", + 4349: "fsportmap", + 4350: "net-device", + 4351: "plcy-net-svcs", + 4352: "pjlink", + 4353: "f5-iquery", + 4354: "qsnet-trans", + 4355: "qsnet-workst", + 4356: "qsnet-assist", + 4357: "qsnet-cond", + 4358: "qsnet-nucl", + 4359: "omabcastltkm", + 4360: "matrix-vnet", + 4368: "wxbrief", + 4369: "epmd", + 4370: "elpro-tunnel", + 4371: "l2c-control", + 4372: "l2c-data", + 4373: "remctl", + 4374: "psi-ptt", + 4375: "tolteces", + 4376: "bip", + 4377: "cp-spxsvr", + 4378: "cp-spxdpy", + 4379: "ctdb", + 4389: "xandros-cms", + 4390: "wiegand", + 4391: "apwi-imserver", + 4392: "apwi-rxserver", + 4393: "apwi-rxspooler", + 4395: "omnivisionesx", + 4396: "fly", + 4400: "ds-srv", + 4401: "ds-srvr", + 4402: "ds-clnt", + 4403: "ds-user", + 4404: "ds-admin", + 4405: "ds-mail", + 4406: "ds-slp", + 4407: "nacagent", + 4408: "slscc", + 4409: "netcabinet-com", + 4410: "itwo-server", + 4411: "found", + 4413: "avi-nms", + 4414: "updog", + 4415: "brcd-vr-req", + 4416: "pjj-player", + 4417: "workflowdir", + 4419: "cbp", + 4420: "nvm-express", + 4421: "scaleft", + 4422: "tsepisp", + 4423: "thingkit", + 4425: "netrockey6", + 4426: "beacon-port-2", + 4427: "drizzle", + 4428: "omviserver", + 4429: "omviagent", + 4430: "rsqlserver", + 4431: "wspipe", + 4432: "l-acoustics", + 4433: "vop", + 4442: "saris", + 4443: "pharos", + 4444: "krb524", + 4445: "upnotifyp", + 4446: "n1-fwp", + 4447: "n1-rmgmt", + 4448: "asc-slmd", + 4449: "privatewire", + 4450: "camp", + 4451: "ctisystemmsg", + 4452: "ctiprogramload", + 4453: "nssalertmgr", + 4454: "nssagentmgr", + 4455: "prchat-user", + 4456: "prchat-server", + 4457: "prRegister", + 4458: "mcp", + 4484: "hpssmgmt", + 4485: "assyst-dr", + 4486: "icms", + 4487: "prex-tcp", + 4488: "awacs-ice", + 4500: "ipsec-nat-t", + 4535: "ehs", + 4536: "ehs-ssl", + 4537: "wssauthsvc", + 4538: "swx-gate", + 4545: "worldscores", + 4546: "sf-lm", + 4547: "lanner-lm", + 4548: "synchromesh", + 4549: "aegate", + 4550: "gds-adppiw-db", + 4551: "ieee-mih", + 4552: "menandmice-mon", + 4553: "icshostsvc", + 4554: "msfrs", + 4555: "rsip", + 4556: "dtn-bundle", + 4559: "hylafax", + 4563: "amahi-anywhere", + 4566: "kwtc", + 4567: "tram", + 4568: "bmc-reporting", + 4569: "iax", + 4570: "deploymentmap", + 4573: "cardifftec-back", + 4590: "rid", + 4591: "l3t-at-an", + 4593: "ipt-anri-anri", + 4594: "ias-session", + 4595: "ias-paging", + 4596: "ias-neighbor", + 4597: "a21-an-1xbs", + 4598: "a16-an-an", + 4599: "a17-an-an", + 4600: "piranha1", + 4601: "piranha2", + 4602: "mtsserver", + 4603: "menandmice-upg", + 4604: "irp", + 4605: "sixchat", + 4658: "playsta2-app", + 4659: "playsta2-lob", + 4660: "smaclmgr", + 4661: "kar2ouche", + 4662: "oms", + 4663: "noteit", + 4664: "ems", + 4665: "contclientms", + 4666: "eportcomm", + 4667: "mmacomm", + 4668: "mmaeds", + 4669: "eportcommdata", + 4670: "light", + 4671: "acter", + 4672: "rfa", + 4673: "cxws", + 4674: "appiq-mgmt", + 4675: "dhct-status", + 4676: "dhct-alerts", + 4677: "bcs", + 4678: "traversal", + 4679: "mgesupervision", + 4680: "mgemanagement", + 4681: "parliant", + 4682: "finisar", + 4683: "spike", + 4684: "rfid-rp1", + 4685: "autopac", + 4686: "msp-os", + 4687: "nst", + 4688: "mobile-p2p", + 4689: "altovacentral", + 4690: "prelude", + 4691: "mtn", + 4692: "conspiracy", + 4700: "netxms-agent", + 4701: "netxms-mgmt", + 4702: "netxms-sync", + 4703: "npqes-test", + 4704: "assuria-ins", + 4711: "trinity-dist", + 4725: "truckstar", + 4727: "fcis", + 4728: "capmux", + 4730: "gearman", + 4731: "remcap", + 4733: "resorcs", + 4737: "ipdr-sp", + 4738: "solera-lpn", + 4739: "ipfix", + 4740: "ipfixs", + 4741: "lumimgrd", + 4742: "sicct", + 4743: "openhpid", + 4744: "ifsp", + 4745: "fmp", + 4749: "profilemac", + 4750: "ssad", + 4751: "spocp", + 4752: "snap", + 4753: "simon", + 4756: "RDCenter", + 4774: "converge", + 4784: "bfd-multi-ctl", + 4786: "smart-install", + 4787: "sia-ctrl-plane", + 4788: "xmcp", + 4800: "iims", + 4801: "iwec", + 4802: "ilss", + 4803: "notateit", + 4827: "htcp", + 4837: "varadero-0", + 4838: "varadero-1", + 4839: "varadero-2", + 4840: "opcua-tcp", + 4841: "quosa", + 4842: "gw-asv", + 4843: "opcua-tls", + 4844: "gw-log", + 4845: "wcr-remlib", + 4846: "contamac-icm", + 4847: "wfc", + 4848: "appserv-http", + 4849: "appserv-https", + 4850: "sun-as-nodeagt", + 4851: "derby-repli", + 4867: "unify-debug", + 4868: "phrelay", + 4869: "phrelaydbg", + 4870: "cc-tracking", + 4871: "wired", + 4876: "tritium-can", + 4877: "lmcs", + 4879: "wsdl-event", + 4880: "hislip", + 4883: "wmlserver", + 4884: "hivestor", + 4885: "abbs", + 4894: "lyskom", + 4899: "radmin-port", + 4900: "hfcs", + 4901: "flr-agent", + 4902: "magiccontrol", + 4912: "lutap", + 4913: "lutcp", + 4914: "bones", + 4915: "frcs", + 4940: "eq-office-4940", + 4941: "eq-office-4941", + 4942: "eq-office-4942", + 4949: "munin", + 4950: "sybasesrvmon", + 4951: "pwgwims", + 4952: "sagxtsds", + 4953: "dbsyncarbiter", + 4969: "ccss-qmm", + 4970: "ccss-qsm", + 4971: "burp", + 4984: "webyast", + 4985: "gerhcs", + 4986: "mrip", + 4987: "smar-se-port1", + 4988: "smar-se-port2", + 4989: "parallel", + 4990: "busycal", + 4991: "vrt", + 4999: "hfcs-manager", + 5000: "commplex-main", + 5001: "commplex-link", + 5002: "rfe", + 5003: "fmpro-internal", + 5004: "avt-profile-1", + 5005: "avt-profile-2", + 5006: "wsm-server", + 5007: "wsm-server-ssl", + 5008: "synapsis-edge", + 5009: "winfs", + 5010: "telelpathstart", + 5011: "telelpathattack", + 5012: "nsp", + 5013: "fmpro-v6", + 5015: "fmwp", + 5020: "zenginkyo-1", + 5021: "zenginkyo-2", + 5022: "mice", + 5023: "htuilsrv", + 5024: "scpi-telnet", + 5025: "scpi-raw", + 5026: "strexec-d", + 5027: "strexec-s", + 5028: "qvr", + 5029: "infobright", + 5030: "surfpass", + 5032: "signacert-agent", + 5033: "jtnetd-server", + 5034: "jtnetd-status", + 5042: "asnaacceler8db", + 5043: "swxadmin", + 5044: "lxi-evntsvc", + 5045: "osp", + 5048: "texai", + 5049: "ivocalize", + 5050: "mmcc", + 5051: "ita-agent", + 5052: "ita-manager", + 5053: "rlm", + 5054: "rlm-admin", + 5055: "unot", + 5056: "intecom-ps1", + 5057: "intecom-ps2", + 5059: "sds", + 5060: "sip", + 5061: "sips", + 5062: "na-localise", + 5063: "csrpc", + 5064: "ca-1", + 5065: "ca-2", + 5066: "stanag-5066", + 5067: "authentx", + 5068: "bitforestsrv", + 5069: "i-net-2000-npr", + 5070: "vtsas", + 5071: "powerschool", + 5072: "ayiya", + 5073: "tag-pm", + 5074: "alesquery", + 5075: "pvaccess", + 5080: "onscreen", + 5081: "sdl-ets", + 5082: "qcp", + 5083: "qfp", + 5084: "llrp", + 5085: "encrypted-llrp", + 5086: "aprigo-cs", + 5087: "biotic", + 5093: "sentinel-lm", + 5094: "hart-ip", + 5099: "sentlm-srv2srv", + 5100: "socalia", + 5101: "talarian-tcp", + 5102: "oms-nonsecure", + 5103: "actifio-c2c", + 5106: "actifioudsagent", + 5107: "actifioreplic", + 5111: "taep-as-svc", + 5112: "pm-cmdsvr", + 5114: "ev-services", + 5115: "autobuild", + 5117: "gradecam", + 5120: "barracuda-bbs", + 5133: "nbt-pc", + 5134: "ppactivation", + 5135: "erp-scale", + 5137: "ctsd", + 5145: "rmonitor-secure", + 5146: "social-alarm", + 5150: "atmp", + 5151: "esri-sde", + 5152: "sde-discovery", + 5153: "toruxserver", + 5154: "bzflag", + 5155: "asctrl-agent", + 5156: "rugameonline", + 5157: "mediat", + 5161: "snmpssh", + 5162: "snmpssh-trap", + 5163: "sbackup", + 5164: "vpa", + 5165: "ife-icorp", + 5166: "winpcs", + 5167: "scte104", + 5168: "scte30", + 5172: "pcoip-mgmt", + 5190: "aol", + 5191: "aol-1", + 5192: "aol-2", + 5193: "aol-3", + 5194: "cpscomm", + 5195: "ampl-lic", + 5196: "ampl-tableproxy", + 5197: "tunstall-lwp", + 5200: "targus-getdata", + 5201: "targus-getdata1", + 5202: "targus-getdata2", + 5203: "targus-getdata3", + 5209: "nomad", + 5215: "noteza", + 5221: "3exmp", + 5222: "xmpp-client", + 5223: "hpvirtgrp", + 5224: "hpvirtctrl", + 5225: "hp-server", + 5226: "hp-status", + 5227: "perfd", + 5228: "hpvroom", + 5229: "jaxflow", + 5230: "jaxflow-data", + 5231: "crusecontrol", + 5232: "csedaemon", + 5233: "enfs", + 5234: "eenet", + 5235: "galaxy-network", + 5236: "padl2sim", + 5237: "mnet-discovery", + 5245: "downtools", + 5248: "caacws", + 5249: "caaclang2", + 5250: "soagateway", + 5251: "caevms", + 5252: "movaz-ssc", + 5253: "kpdp", + 5254: "logcabin", + 5264: "3com-njack-1", + 5265: "3com-njack-2", + 5269: "xmpp-server", + 5270: "cartographerxmp", + 5271: "cuelink", + 5272: "pk", + 5280: "xmpp-bosh", + 5281: "undo-lm", + 5282: "transmit-port", + 5298: "presence", + 5299: "nlg-data", + 5300: "hacl-hb", + 5301: "hacl-gs", + 5302: "hacl-cfg", + 5303: "hacl-probe", + 5304: "hacl-local", + 5305: "hacl-test", + 5306: "sun-mc-grp", + 5307: "sco-aip", + 5308: "cfengine", + 5309: "jprinter", + 5310: "outlaws", + 5312: "permabit-cs", + 5313: "rrdp", + 5314: "opalis-rbt-ipc", + 5315: "hacl-poll", + 5316: "hpbladems", + 5317: "hpdevms", + 5318: "pkix-cmc", + 5320: "bsfserver-zn", + 5321: "bsfsvr-zn-ssl", + 5343: "kfserver", + 5344: "xkotodrcp", + 5349: "stuns", + 5352: "dns-llq", + 5353: "mdns", + 5354: "mdnsresponder", + 5355: "llmnr", + 5356: "ms-smlbiz", + 5357: "wsdapi", + 5358: "wsdapi-s", + 5359: "ms-alerter", + 5360: "ms-sideshow", + 5361: "ms-s-sideshow", + 5362: "serverwsd2", + 5363: "net-projection", + 5397: "stresstester", + 5398: "elektron-admin", + 5399: "securitychase", + 5400: "excerpt", + 5401: "excerpts", + 5402: "mftp", + 5403: "hpoms-ci-lstn", + 5404: "hpoms-dps-lstn", + 5405: "netsupport", + 5406: "systemics-sox", + 5407: "foresyte-clear", + 5408: "foresyte-sec", + 5409: "salient-dtasrv", + 5410: "salient-usrmgr", + 5411: "actnet", + 5412: "continuus", + 5413: "wwiotalk", + 5414: "statusd", + 5415: "ns-server", + 5416: "sns-gateway", + 5417: "sns-agent", + 5418: "mcntp", + 5419: "dj-ice", + 5420: "cylink-c", + 5421: "netsupport2", + 5422: "salient-mux", + 5423: "virtualuser", + 5424: "beyond-remote", + 5425: "br-channel", + 5426: "devbasic", + 5427: "sco-peer-tta", + 5428: "telaconsole", + 5429: "base", + 5430: "radec-corp", + 5431: "park-agent", + 5432: "postgresql", + 5433: "pyrrho", + 5434: "sgi-arrayd", + 5435: "sceanics", + 5443: "spss", + 5445: "smbdirect", + 5450: "tiepie", + 5453: "surebox", + 5454: "apc-5454", + 5455: "apc-5455", + 5456: "apc-5456", + 5461: "silkmeter", + 5462: "ttl-publisher", + 5463: "ttlpriceproxy", + 5464: "quailnet", + 5465: "netops-broker", + 5470: "apsolab-col", + 5471: "apsolab-cols", + 5472: "apsolab-tag", + 5473: "apsolab-tags", + 5475: "apsolab-data", + 5500: "fcp-addr-srvr1", + 5501: "fcp-addr-srvr2", + 5502: "fcp-srvr-inst1", + 5503: "fcp-srvr-inst2", + 5504: "fcp-cics-gw1", + 5505: "checkoutdb", + 5506: "amc", + 5507: "psl-management", + 5550: "cbus", + 5553: "sgi-eventmond", + 5554: "sgi-esphttp", + 5555: "personal-agent", + 5556: "freeciv", + 5557: "farenet", + 5565: "hpe-dp-bura", + 5566: "westec-connect", + 5567: "dof-dps-mc-sec", + 5568: "sdt", + 5569: "rdmnet-ctrl", + 5573: "sdmmp", + 5574: "lsi-bobcat", + 5575: "ora-oap", + 5579: "fdtracks", + 5580: "tmosms0", + 5581: "tmosms1", + 5582: "fac-restore", + 5583: "tmo-icon-sync", + 5584: "bis-web", + 5585: "bis-sync", + 5586: "att-mt-sms", + 5597: "ininmessaging", + 5598: "mctfeed", + 5599: "esinstall", + 5600: "esmmanager", + 5601: "esmagent", + 5602: "a1-msc", + 5603: "a1-bs", + 5604: "a3-sdunode", + 5605: "a4-sdunode", + 5618: "efr", + 5627: "ninaf", + 5628: "htrust", + 5629: "symantec-sfdb", + 5630: "precise-comm", + 5631: "pcanywheredata", + 5632: "pcanywherestat", + 5633: "beorl", + 5634: "xprtld", + 5635: "sfmsso", + 5636: "sfm-db-server", + 5637: "cssc", + 5638: "flcrs", + 5639: "ics", + 5646: "vfmobile", + 5666: "nrpe", + 5670: "filemq", + 5671: "amqps", + 5672: "amqp", + 5673: "jms", + 5674: "hyperscsi-port", + 5675: "v5ua", + 5676: "raadmin", + 5677: "questdb2-lnchr", + 5678: "rrac", + 5679: "dccm", + 5680: "auriga-router", + 5681: "ncxcp", + 5688: "ggz", + 5689: "qmvideo", + 5693: "rbsystem", + 5696: "kmip", + 5700: "supportassist", + 5705: "storageos", + 5713: "proshareaudio", + 5714: "prosharevideo", + 5715: "prosharedata", + 5716: "prosharerequest", + 5717: "prosharenotify", + 5718: "dpm", + 5719: "dpm-agent", + 5720: "ms-licensing", + 5721: "dtpt", + 5722: "msdfsr", + 5723: "omhs", + 5724: "omsdk", + 5725: "ms-ilm", + 5726: "ms-ilm-sts", + 5727: "asgenf", + 5728: "io-dist-data", + 5729: "openmail", + 5730: "unieng", + 5741: "ida-discover1", + 5742: "ida-discover2", + 5743: "watchdoc-pod", + 5744: "watchdoc", + 5745: "fcopy-server", + 5746: "fcopys-server", + 5747: "tunatic", + 5748: "tunalyzer", + 5750: "rscd", + 5755: "openmailg", + 5757: "x500ms", + 5766: "openmailns", + 5767: "s-openmail", + 5768: "openmailpxy", + 5769: "spramsca", + 5770: "spramsd", + 5771: "netagent", + 5777: "dali-port", + 5780: "vts-rpc", + 5781: "3par-evts", + 5782: "3par-mgmt", + 5783: "3par-mgmt-ssl", + 5785: "3par-rcopy", + 5793: "xtreamx", + 5813: "icmpd", + 5814: "spt-automation", + 5841: "shiprush-d-ch", + 5842: "reversion", + 5859: "wherehoo", + 5863: "ppsuitemsg", + 5868: "diameters", + 5883: "jute", + 5900: "rfb", + 5910: "cm", + 5911: "cpdlc", + 5912: "fis", + 5913: "ads-c", + 5963: "indy", + 5968: "mppolicy-v5", + 5969: "mppolicy-mgr", + 5984: "couchdb", + 5985: "wsman", + 5986: "wsmans", + 5987: "wbem-rmi", + 5988: "wbem-http", + 5989: "wbem-https", + 5990: "wbem-exp-https", + 5991: "nuxsl", + 5992: "consul-insight", + 5993: "cim-rs", + 5999: "cvsup", + 6064: "ndl-ahp-svc", + 6065: "winpharaoh", + 6066: "ewctsp", + 6068: "gsmp-ancp", + 6069: "trip", + 6070: "messageasap", + 6071: "ssdtp", + 6072: "diagnose-proc", + 6073: "directplay8", + 6074: "max", + 6075: "dpm-acm", + 6076: "msft-dpm-cert", + 6077: "iconstructsrv", + 6084: "reload-config", + 6085: "konspire2b", + 6086: "pdtp", + 6087: "ldss", + 6088: "doglms", + 6099: "raxa-mgmt", + 6100: "synchronet-db", + 6101: "synchronet-rtc", + 6102: "synchronet-upd", + 6103: "rets", + 6104: "dbdb", + 6105: "primaserver", + 6106: "mpsserver", + 6107: "etc-control", + 6108: "sercomm-scadmin", + 6109: "globecast-id", + 6110: "softcm", + 6111: "spc", + 6112: "dtspcd", + 6113: "dayliteserver", + 6114: "wrspice", + 6115: "xic", + 6116: "xtlserv", + 6117: "daylitetouch", + 6121: "spdy", + 6122: "bex-webadmin", + 6123: "backup-express", + 6124: "pnbs", + 6130: "damewaremobgtwy", + 6133: "nbt-wol", + 6140: "pulsonixnls", + 6141: "meta-corp", + 6142: "aspentec-lm", + 6143: "watershed-lm", + 6144: "statsci1-lm", + 6145: "statsci2-lm", + 6146: "lonewolf-lm", + 6147: "montage-lm", + 6148: "ricardo-lm", + 6149: "tal-pod", + 6159: "efb-aci", + 6160: "ecmp", + 6161: "patrol-ism", + 6162: "patrol-coll", + 6163: "pscribe", + 6200: "lm-x", + 6209: "qmtps", + 6222: "radmind", + 6241: "jeol-nsdtp-1", + 6242: "jeol-nsdtp-2", + 6243: "jeol-nsdtp-3", + 6244: "jeol-nsdtp-4", + 6251: "tl1-raw-ssl", + 6252: "tl1-ssh", + 6253: "crip", + 6267: "gld", + 6268: "grid", + 6269: "grid-alt", + 6300: "bmc-grx", + 6301: "bmc-ctd-ldap", + 6306: "ufmp", + 6315: "scup", + 6316: "abb-escp", + 6317: "nav-data-cmd", + 6320: "repsvc", + 6321: "emp-server1", + 6322: "emp-server2", + 6324: "hrd-ncs", + 6325: "dt-mgmtsvc", + 6326: "dt-vra", + 6343: "sflow", + 6344: "streletz", + 6346: "gnutella-svc", + 6347: "gnutella-rtr", + 6350: "adap", + 6355: "pmcs", + 6360: "metaedit-mu", + 6370: "metaedit-se", + 6379: "redis", + 6382: "metatude-mds", + 6389: "clariion-evr01", + 6390: "metaedit-ws", + 6417: "faxcomservice", + 6418: "syserverremote", + 6419: "svdrp", + 6420: "nim-vdrshell", + 6421: "nim-wan", + 6432: "pgbouncer", + 6442: "tarp", + 6443: "sun-sr-https", + 6444: "sge-qmaster", + 6445: "sge-execd", + 6446: "mysql-proxy", + 6455: "skip-cert-recv", + 6456: "skip-cert-send", + 6464: "ieee11073-20701", + 6471: "lvision-lm", + 6480: "sun-sr-http", + 6481: "servicetags", + 6482: "ldoms-mgmt", + 6483: "SunVTS-RMI", + 6484: "sun-sr-jms", + 6485: "sun-sr-iiop", + 6486: "sun-sr-iiops", + 6487: "sun-sr-iiop-aut", + 6488: "sun-sr-jmx", + 6489: "sun-sr-admin", + 6500: "boks", + 6501: "boks-servc", + 6502: "boks-servm", + 6503: "boks-clntd", + 6505: "badm-priv", + 6506: "badm-pub", + 6507: "bdir-priv", + 6508: "bdir-pub", + 6509: "mgcs-mfp-port", + 6510: "mcer-port", + 6513: "netconf-tls", + 6514: "syslog-tls", + 6515: "elipse-rec", + 6543: "lds-distrib", + 6544: "lds-dump", + 6547: "apc-6547", + 6548: "apc-6548", + 6549: "apc-6549", + 6550: "fg-sysupdate", + 6551: "sum", + 6558: "xdsxdm", + 6566: "sane-port", + 6568: "canit-store", + 6579: "affiliate", + 6580: "parsec-master", + 6581: "parsec-peer", + 6582: "parsec-game", + 6583: "joaJewelSuite", + 6600: "mshvlm", + 6601: "mstmg-sstp", + 6602: "wsscomfrmwk", + 6619: "odette-ftps", + 6620: "kftp-data", + 6621: "kftp", + 6622: "mcftp", + 6623: "ktelnet", + 6624: "datascaler-db", + 6625: "datascaler-ctl", + 6626: "wago-service", + 6627: "nexgen", + 6628: "afesc-mc", + 6629: "nexgen-aux", + 6632: "mxodbc-connect", + 6640: "ovsdb", + 6653: "openflow", + 6655: "pcs-sf-ui-man", + 6656: "emgmsg", + 6670: "vocaltec-gold", + 6671: "p4p-portal", + 6672: "vision-server", + 6673: "vision-elmd", + 6678: "vfbp", + 6679: "osaut", + 6687: "clever-ctrace", + 6688: "clever-tcpip", + 6689: "tsa", + 6690: "cleverdetect", + 6697: "ircs-u", + 6701: "kti-icad-srvr", + 6702: "e-design-net", + 6703: "e-design-web", + 6714: "ibprotocol", + 6715: "fibotrader-com", + 6716: "princity-agent", + 6767: "bmc-perf-agent", + 6768: "bmc-perf-mgrd", + 6769: "adi-gxp-srvprt", + 6770: "plysrv-http", + 6771: "plysrv-https", + 6777: "ntz-tracker", + 6778: "ntz-p2p-storage", + 6785: "dgpf-exchg", + 6786: "smc-jmx", + 6787: "smc-admin", + 6788: "smc-http", + 6789: "radg", + 6790: "hnmp", + 6791: "hnm", + 6801: "acnet", + 6817: "pentbox-sim", + 6831: "ambit-lm", + 6841: "netmo-default", + 6842: "netmo-http", + 6850: "iccrushmore", + 6868: "acctopus-cc", + 6888: "muse", + 6900: "rtimeviewer", + 6901: "jetstream", + 6935: "ethoscan", + 6936: "xsmsvc", + 6946: "bioserver", + 6951: "otlp", + 6961: "jmact3", + 6962: "jmevt2", + 6963: "swismgr1", + 6964: "swismgr2", + 6965: "swistrap", + 6966: "swispol", + 6969: "acmsoda", + 6970: "conductor", + 6997: "MobilitySrv", + 6998: "iatp-highpri", + 6999: "iatp-normalpri", + 7000: "afs3-fileserver", + 7001: "afs3-callback", + 7002: "afs3-prserver", + 7003: "afs3-vlserver", + 7004: "afs3-kaserver", + 7005: "afs3-volser", + 7006: "afs3-errors", + 7007: "afs3-bos", + 7008: "afs3-update", + 7009: "afs3-rmtsys", + 7010: "ups-onlinet", + 7011: "talon-disc", + 7012: "talon-engine", + 7013: "microtalon-dis", + 7014: "microtalon-com", + 7015: "talon-webserver", + 7016: "spg", + 7017: "grasp", + 7018: "fisa-svc", + 7019: "doceri-ctl", + 7020: "dpserve", + 7021: "dpserveadmin", + 7022: "ctdp", + 7023: "ct2nmcs", + 7024: "vmsvc", + 7025: "vmsvc-2", + 7030: "op-probe", + 7031: "iposplanet", + 7070: "arcp", + 7071: "iwg1", + 7073: "martalk", + 7080: "empowerid", + 7099: "lazy-ptop", + 7100: "font-service", + 7101: "elcn", + 7117: "rothaga", + 7121: "virprot-lm", + 7128: "scenidm", + 7129: "scenccs", + 7161: "cabsm-comm", + 7162: "caistoragemgr", + 7163: "cacsambroker", + 7164: "fsr", + 7165: "doc-server", + 7166: "aruba-server", + 7167: "casrmagent", + 7168: "cnckadserver", + 7169: "ccag-pib", + 7170: "nsrp", + 7171: "drm-production", + 7172: "metalbend", + 7173: "zsecure", + 7174: "clutild", + 7200: "fodms", + 7201: "dlip", + 7202: "pon-ictp", + 7215: "PS-Server", + 7216: "PS-Capture-Pro", + 7227: "ramp", + 7228: "citrixupp", + 7229: "citrixuppg", + 7236: "display", + 7237: "pads", + 7244: "frc-hicp", + 7262: "cnap", + 7272: "watchme-7272", + 7273: "oma-rlp", + 7274: "oma-rlp-s", + 7275: "oma-ulp", + 7276: "oma-ilp", + 7277: "oma-ilp-s", + 7278: "oma-dcdocbs", + 7279: "ctxlic", + 7280: "itactionserver1", + 7281: "itactionserver2", + 7282: "mzca-action", + 7283: "genstat", + 7365: "lcm-server", + 7391: "mindfilesys", + 7392: "mrssrendezvous", + 7393: "nfoldman", + 7394: "fse", + 7395: "winqedit", + 7397: "hexarc", + 7400: "rtps-discovery", + 7401: "rtps-dd-ut", + 7402: "rtps-dd-mt", + 7410: "ionixnetmon", + 7411: "daqstream", + 7421: "mtportmon", + 7426: "pmdmgr", + 7427: "oveadmgr", + 7428: "ovladmgr", + 7429: "opi-sock", + 7430: "xmpv7", + 7431: "pmd", + 7437: "faximum", + 7443: "oracleas-https", + 7471: "sttunnel", + 7473: "rise", + 7474: "neo4j", + 7478: "openit", + 7491: "telops-lmd", + 7500: "silhouette", + 7501: "ovbus", + 7508: "adcp", + 7509: "acplt", + 7510: "ovhpas", + 7511: "pafec-lm", + 7542: "saratoga", + 7543: "atul", + 7544: "nta-ds", + 7545: "nta-us", + 7546: "cfs", + 7547: "cwmp", + 7548: "tidp", + 7549: "nls-tl", + 7551: "controlone-con", + 7560: "sncp", + 7563: "cfw", + 7566: "vsi-omega", + 7569: "dell-eql-asm", + 7570: "aries-kfinder", + 7574: "coherence", + 7588: "sun-lm", + 7606: "mipi-debug", + 7624: "indi", + 7626: "simco", + 7627: "soap-http", + 7628: "zen-pawn", + 7629: "xdas", + 7630: "hawk", + 7631: "tesla-sys-msg", + 7633: "pmdfmgt", + 7648: "cuseeme", + 7672: "imqstomp", + 7673: "imqstomps", + 7674: "imqtunnels", + 7675: "imqtunnel", + 7676: "imqbrokerd", + 7677: "sun-user-https", + 7680: "pando-pub", + 7683: "dmt", + 7687: "bolt", + 7689: "collaber", + 7697: "klio", + 7700: "em7-secom", + 7707: "sync-em7", + 7708: "scinet", + 7720: "medimageportal", + 7724: "nsdeepfreezectl", + 7725: "nitrogen", + 7726: "freezexservice", + 7727: "trident-data", + 7728: "osvr", + 7734: "smip", + 7738: "aiagent", + 7741: "scriptview", + 7742: "msss", + 7743: "sstp-1", + 7744: "raqmon-pdu", + 7747: "prgp", + 7775: "inetfs", + 7777: "cbt", + 7778: "interwise", + 7779: "vstat", + 7781: "accu-lmgr", + 7786: "minivend", + 7787: "popup-reminders", + 7789: "office-tools", + 7794: "q3ade", + 7797: "pnet-conn", + 7798: "pnet-enc", + 7799: "altbsdp", + 7800: "asr", + 7801: "ssp-client", + 7810: "rbt-wanopt", + 7845: "apc-7845", + 7846: "apc-7846", + 7847: "csoauth", + 7869: "mobileanalyzer", + 7870: "rbt-smc", + 7871: "mdm", + 7878: "owms", + 7880: "pss", + 7887: "ubroker", + 7900: "mevent", + 7901: "tnos-sp", + 7902: "tnos-dp", + 7903: "tnos-dps", + 7913: "qo-secure", + 7932: "t2-drm", + 7933: "t2-brm", + 7962: "generalsync", + 7967: "supercell", + 7979: "micromuse-ncps", + 7980: "quest-vista", + 7981: "sossd-collect", + 7982: "sossd-agent", + 7997: "pushns", + 7999: "irdmi2", + 8000: "irdmi", + 8001: "vcom-tunnel", + 8002: "teradataordbms", + 8003: "mcreport", + 8005: "mxi", + 8006: "wpl-analytics", + 8007: "warppipe", + 8008: "http-alt", + 8019: "qbdb", + 8020: "intu-ec-svcdisc", + 8021: "intu-ec-client", + 8022: "oa-system", + 8025: "ca-audit-da", + 8026: "ca-audit-ds", + 8032: "pro-ed", + 8033: "mindprint", + 8034: "vantronix-mgmt", + 8040: "ampify", + 8041: "enguity-xccetp", + 8042: "fs-agent", + 8043: "fs-server", + 8044: "fs-mgmt", + 8051: "rocrail", + 8052: "senomix01", + 8053: "senomix02", + 8054: "senomix03", + 8055: "senomix04", + 8056: "senomix05", + 8057: "senomix06", + 8058: "senomix07", + 8059: "senomix08", + 8066: "toad-bi-appsrvr", + 8067: "infi-async", + 8070: "ucs-isc", + 8074: "gadugadu", + 8077: "mles", + 8080: "http-alt", + 8081: "sunproxyadmin", + 8082: "us-cli", + 8083: "us-srv", + 8086: "d-s-n", + 8087: "simplifymedia", + 8088: "radan-http", + 8090: "opsmessaging", + 8091: "jamlink", + 8097: "sac", + 8100: "xprint-server", + 8101: "ldoms-migr", + 8102: "kz-migr", + 8115: "mtl8000-matrix", + 8116: "cp-cluster", + 8117: "purityrpc", + 8118: "privoxy", + 8121: "apollo-data", + 8122: "apollo-admin", + 8128: "paycash-online", + 8129: "paycash-wbp", + 8130: "indigo-vrmi", + 8131: "indigo-vbcp", + 8132: "dbabble", + 8140: "puppet", + 8148: "isdd", + 8153: "quantastor", + 8160: "patrol", + 8161: "patrol-snmp", + 8162: "lpar2rrd", + 8181: "intermapper", + 8182: "vmware-fdm", + 8183: "proremote", + 8184: "itach", + 8190: "gcp-rphy", + 8191: "limnerpressure", + 8192: "spytechphone", + 8194: "blp1", + 8195: "blp2", + 8199: "vvr-data", + 8200: "trivnet1", + 8201: "trivnet2", + 8204: "lm-perfworks", + 8205: "lm-instmgr", + 8206: "lm-dta", + 8207: "lm-sserver", + 8208: "lm-webwatcher", + 8230: "rexecj", + 8243: "synapse-nhttps", + 8270: "robot-remote", + 8276: "pando-sec", + 8280: "synapse-nhttp", + 8282: "libelle", + 8292: "blp3", + 8293: "hiperscan-id", + 8294: "blp4", + 8300: "tmi", + 8301: "amberon", + 8313: "hub-open-net", + 8320: "tnp-discover", + 8321: "tnp", + 8322: "garmin-marine", + 8351: "server-find", + 8376: "cruise-enum", + 8377: "cruise-swroute", + 8378: "cruise-config", + 8379: "cruise-diags", + 8380: "cruise-update", + 8383: "m2mservices", + 8400: "cvd", + 8401: "sabarsd", + 8402: "abarsd", + 8403: "admind", + 8404: "svcloud", + 8405: "svbackup", + 8415: "dlpx-sp", + 8416: "espeech", + 8417: "espeech-rtp", + 8423: "aritts", + 8442: "cybro-a-bus", + 8443: "pcsync-https", + 8444: "pcsync-http", + 8445: "copy", + 8450: "npmp", + 8457: "nexentamv", + 8470: "cisco-avp", + 8471: "pim-port", + 8472: "otv", + 8473: "vp2p", + 8474: "noteshare", + 8500: "fmtp", + 8501: "cmtp-mgt", + 8502: "ftnmtp", + 8554: "rtsp-alt", + 8555: "d-fence", + 8567: "dof-tunnel", + 8600: "asterix", + 8610: "canon-mfnp", + 8611: "canon-bjnp1", + 8612: "canon-bjnp2", + 8613: "canon-bjnp3", + 8614: "canon-bjnp4", + 8615: "imink", + 8665: "monetra", + 8666: "monetra-admin", + 8675: "msi-cps-rm", + 8686: "sun-as-jmxrmi", + 8688: "openremote-ctrl", + 8699: "vnyx", + 8711: "nvc", + 8733: "ibus", + 8750: "dey-keyneg", + 8763: "mc-appserver", + 8764: "openqueue", + 8765: "ultraseek-http", + 8766: "amcs", + 8770: "dpap", + 8778: "uec", + 8786: "msgclnt", + 8787: "msgsrvr", + 8793: "acd-pm", + 8800: "sunwebadmin", + 8804: "truecm", + 8873: "dxspider", + 8880: "cddbp-alt", + 8881: "galaxy4d", + 8883: "secure-mqtt", + 8888: "ddi-tcp-1", + 8889: "ddi-tcp-2", + 8890: "ddi-tcp-3", + 8891: "ddi-tcp-4", + 8892: "ddi-tcp-5", + 8893: "ddi-tcp-6", + 8894: "ddi-tcp-7", + 8899: "ospf-lite", + 8900: "jmb-cds1", + 8901: "jmb-cds2", + 8910: "manyone-http", + 8911: "manyone-xml", + 8912: "wcbackup", + 8913: "dragonfly", + 8937: "twds", + 8953: "ub-dns-control", + 8954: "cumulus-admin", + 8980: "nod-provider", + 8989: "sunwebadmins", + 8990: "http-wmap", + 8991: "https-wmap", + 8997: "oracle-ms-ens", + 8998: "canto-roboflow", + 8999: "bctp", + 9000: "cslistener", + 9001: "etlservicemgr", + 9002: "dynamid", + 9005: "golem", + 9008: "ogs-server", + 9009: "pichat", + 9010: "sdr", + 9020: "tambora", + 9021: "panagolin-ident", + 9022: "paragent", + 9023: "swa-1", + 9024: "swa-2", + 9025: "swa-3", + 9026: "swa-4", + 9050: "versiera", + 9051: "fio-cmgmt", + 9060: "CardWeb-IO", + 9080: "glrpc", + 9083: "emc-pp-mgmtsvc", + 9084: "aurora", + 9085: "ibm-rsyscon", + 9086: "net2display", + 9087: "classic", + 9088: "sqlexec", + 9089: "sqlexec-ssl", + 9090: "websm", + 9091: "xmltec-xmlmail", + 9092: "XmlIpcRegSvc", + 9093: "copycat", + 9100: "hp-pdl-datastr", + 9101: "bacula-dir", + 9102: "bacula-fd", + 9103: "bacula-sd", + 9104: "peerwire", + 9105: "xadmin", + 9106: "astergate", + 9107: "astergatefax", + 9119: "mxit", + 9122: "grcmp", + 9123: "grcp", + 9131: "dddp", + 9160: "apani1", + 9161: "apani2", + 9162: "apani3", + 9163: "apani4", + 9164: "apani5", + 9191: "sun-as-jpda", + 9200: "wap-wsp", + 9201: "wap-wsp-wtp", + 9202: "wap-wsp-s", + 9203: "wap-wsp-wtp-s", + 9204: "wap-vcard", + 9205: "wap-vcal", + 9206: "wap-vcard-s", + 9207: "wap-vcal-s", + 9208: "rjcdb-vcards", + 9209: "almobile-system", + 9210: "oma-mlp", + 9211: "oma-mlp-s", + 9212: "serverviewdbms", + 9213: "serverstart", + 9214: "ipdcesgbs", + 9215: "insis", + 9216: "acme", + 9217: "fsc-port", + 9222: "teamcoherence", + 9255: "mon", + 9278: "pegasus", + 9279: "pegasus-ctl", + 9280: "pgps", + 9281: "swtp-port1", + 9282: "swtp-port2", + 9283: "callwaveiam", + 9284: "visd", + 9285: "n2h2server", + 9287: "cumulus", + 9292: "armtechdaemon", + 9293: "storview", + 9294: "armcenterhttp", + 9295: "armcenterhttps", + 9300: "vrace", + 9306: "sphinxql", + 9312: "sphinxapi", + 9318: "secure-ts", + 9321: "guibase", + 9343: "mpidcmgr", + 9344: "mphlpdmc", + 9345: "rancher", + 9346: "ctechlicensing", + 9374: "fjdmimgr", + 9380: "boxp", + 9387: "d2dconfig", + 9388: "d2ddatatrans", + 9389: "adws", + 9390: "otp", + 9396: "fjinvmgr", + 9397: "mpidcagt", + 9400: "sec-t4net-srv", + 9401: "sec-t4net-clt", + 9402: "sec-pc2fax-srv", + 9418: "git", + 9443: "tungsten-https", + 9444: "wso2esb-console", + 9445: "mindarray-ca", + 9450: "sntlkeyssrvr", + 9500: "ismserver", + 9535: "mngsuite", + 9536: "laes-bf", + 9555: "trispen-sra", + 9592: "ldgateway", + 9593: "cba8", + 9594: "msgsys", + 9595: "pds", + 9596: "mercury-disc", + 9597: "pd-admin", + 9598: "vscp", + 9599: "robix", + 9600: "micromuse-ncpw", + 9612: "streamcomm-ds", + 9614: "iadt-tls", + 9616: "erunbook-agent", + 9617: "erunbook-server", + 9618: "condor", + 9628: "odbcpathway", + 9629: "uniport", + 9630: "peoctlr", + 9631: "peocoll", + 9640: "pqsflows", + 9666: "zoomcp", + 9667: "xmms2", + 9668: "tec5-sdctp", + 9694: "client-wakeup", + 9695: "ccnx", + 9700: "board-roar", + 9747: "l5nas-parchan", + 9750: "board-voip", + 9753: "rasadv", + 9762: "tungsten-http", + 9800: "davsrc", + 9801: "sstp-2", + 9802: "davsrcs", + 9875: "sapv1", + 9876: "sd", + 9888: "cyborg-systems", + 9889: "gt-proxy", + 9898: "monkeycom", + 9900: "iua", + 9909: "domaintime", + 9911: "sype-transport", + 9925: "xybrid-cloud", + 9950: "apc-9950", + 9951: "apc-9951", + 9952: "apc-9952", + 9953: "acis", + 9954: "hinp", + 9955: "alljoyn-stm", + 9966: "odnsp", + 9978: "xybrid-rt", + 9979: "visweather", + 9981: "pumpkindb", + 9987: "dsm-scm-target", + 9988: "nsesrvr", + 9990: "osm-appsrvr", + 9991: "osm-oev", + 9992: "palace-1", + 9993: "palace-2", + 9994: "palace-3", + 9995: "palace-4", + 9996: "palace-5", + 9997: "palace-6", + 9998: "distinct32", + 9999: "distinct", + 10000: "ndmp", + 10001: "scp-config", + 10002: "documentum", + 10003: "documentum-s", + 10004: "emcrmirccd", + 10005: "emcrmird", + 10006: "netapp-sync", + 10007: "mvs-capacity", + 10008: "octopus", + 10009: "swdtp-sv", + 10010: "rxapi", + 10020: "abb-hw", + 10050: "zabbix-agent", + 10051: "zabbix-trapper", + 10055: "qptlmd", + 10080: "amanda", + 10081: "famdc", + 10100: "itap-ddtp", + 10101: "ezmeeting-2", + 10102: "ezproxy-2", + 10103: "ezrelay", + 10104: "swdtp", + 10107: "bctp-server", + 10110: "nmea-0183", + 10113: "netiq-endpoint", + 10114: "netiq-qcheck", + 10115: "netiq-endpt", + 10116: "netiq-voipa", + 10117: "iqrm", + 10125: "cimple", + 10128: "bmc-perf-sd", + 10129: "bmc-gms", + 10160: "qb-db-server", + 10161: "snmptls", + 10162: "snmptls-trap", + 10200: "trisoap", + 10201: "rsms", + 10252: "apollo-relay", + 10260: "axis-wimp-port", + 10261: "tile-ml", + 10288: "blocks", + 10321: "cosir", + 10540: "MOS-lower", + 10541: "MOS-upper", + 10542: "MOS-aux", + 10543: "MOS-soap", + 10544: "MOS-soap-opt", + 10548: "serverdocs", + 10631: "printopia", + 10800: "gap", + 10805: "lpdg", + 10809: "nbd", + 10860: "helix", + 10880: "bveapi", + 10933: "octopustentacle", + 10990: "rmiaux", + 11000: "irisa", + 11001: "metasys", + 11095: "weave", + 11103: "origo-sync", + 11104: "netapp-icmgmt", + 11105: "netapp-icdata", + 11106: "sgi-lk", + 11109: "sgi-dmfmgr", + 11110: "sgi-soap", + 11111: "vce", + 11112: "dicom", + 11161: "suncacao-snmp", + 11162: "suncacao-jmxmp", + 11163: "suncacao-rmi", + 11164: "suncacao-csa", + 11165: "suncacao-websvc", + 11172: "oemcacao-jmxmp", + 11173: "t5-straton", + 11174: "oemcacao-rmi", + 11175: "oemcacao-websvc", + 11201: "smsqp", + 11202: "dcsl-backup", + 11208: "wifree", + 11211: "memcache", + 11319: "imip", + 11320: "imip-channels", + 11321: "arena-server", + 11367: "atm-uhas", + 11371: "hkp", + 11489: "asgcypresstcps", + 11600: "tempest-port", + 11623: "emc-xsw-dconfig", + 11720: "h323callsigalt", + 11723: "emc-xsw-dcache", + 11751: "intrepid-ssl", + 11796: "lanschool", + 11876: "xoraya", + 11967: "sysinfo-sp", + 12000: "entextxid", + 12001: "entextnetwk", + 12002: "entexthigh", + 12003: "entextmed", + 12004: "entextlow", + 12005: "dbisamserver1", + 12006: "dbisamserver2", + 12007: "accuracer", + 12008: "accuracer-dbms", + 12010: "edbsrvr", + 12012: "vipera", + 12013: "vipera-ssl", + 12109: "rets-ssl", + 12121: "nupaper-ss", + 12168: "cawas", + 12172: "hivep", + 12300: "linogridengine", + 12302: "rads", + 12321: "warehouse-sss", + 12322: "warehouse", + 12345: "italk", + 12753: "tsaf", + 12865: "netperf", + 13160: "i-zipqd", + 13216: "bcslogc", + 13217: "rs-pias", + 13218: "emc-vcas-tcp", + 13223: "powwow-client", + 13224: "powwow-server", + 13400: "doip-data", + 13720: "bprd", + 13721: "bpdbm", + 13722: "bpjava-msvc", + 13724: "vnetd", + 13782: "bpcd", + 13783: "vopied", + 13785: "nbdb", + 13786: "nomdb", + 13818: "dsmcc-config", + 13819: "dsmcc-session", + 13820: "dsmcc-passthru", + 13821: "dsmcc-download", + 13822: "dsmcc-ccp", + 13823: "bmdss", + 13894: "ucontrol", + 13929: "dta-systems", + 13930: "medevolve", + 14000: "scotty-ft", + 14001: "sua", + 14033: "sage-best-com1", + 14034: "sage-best-com2", + 14141: "vcs-app", + 14142: "icpp", + 14143: "icpps", + 14145: "gcm-app", + 14149: "vrts-tdd", + 14150: "vcscmd", + 14154: "vad", + 14250: "cps", + 14414: "ca-web-update", + 14500: "xpra", + 14936: "hde-lcesrvr-1", + 14937: "hde-lcesrvr-2", + 15000: "hydap", + 15002: "onep-tls", + 15345: "xpilot", + 15363: "3link", + 15555: "cisco-snat", + 15660: "bex-xr", + 15740: "ptp", + 15999: "programmar", + 16000: "fmsas", + 16001: "fmsascon", + 16002: "gsms", + 16020: "jwpc", + 16021: "jwpc-bin", + 16161: "sun-sea-port", + 16162: "solaris-audit", + 16309: "etb4j", + 16310: "pduncs", + 16311: "pdefmns", + 16360: "netserialext1", + 16361: "netserialext2", + 16367: "netserialext3", + 16368: "netserialext4", + 16384: "connected", + 16385: "rdgs", + 16619: "xoms", + 16665: "axon-tunnel", + 16789: "cadsisvr", + 16900: "newbay-snc-mc", + 16950: "sgcip", + 16991: "intel-rci-mp", + 16992: "amt-soap-http", + 16993: "amt-soap-https", + 16994: "amt-redir-tcp", + 16995: "amt-redir-tls", + 17007: "isode-dua", + 17184: "vestasdlp", + 17185: "soundsvirtual", + 17219: "chipper", + 17220: "avtp", + 17221: "avdecc", + 17223: "isa100-gci", + 17225: "trdp-md", + 17234: "integrius-stp", + 17235: "ssh-mgmt", + 17500: "db-lsp", + 17555: "ailith", + 17729: "ea", + 17754: "zep", + 17755: "zigbee-ip", + 17756: "zigbee-ips", + 17777: "sw-orion", + 18000: "biimenu", + 18104: "radpdf", + 18136: "racf", + 18181: "opsec-cvp", + 18182: "opsec-ufp", + 18183: "opsec-sam", + 18184: "opsec-lea", + 18185: "opsec-omi", + 18186: "ohsc", + 18187: "opsec-ela", + 18241: "checkpoint-rtm", + 18242: "iclid", + 18243: "clusterxl", + 18262: "gv-pf", + 18463: "ac-cluster", + 18634: "rds-ib", + 18635: "rds-ip", + 18668: "vdmmesh", + 18769: "ique", + 18881: "infotos", + 18888: "apc-necmp", + 19000: "igrid", + 19007: "scintilla", + 19020: "j-link", + 19191: "opsec-uaa", + 19194: "ua-secureagent", + 19220: "cora", + 19283: "keysrvr", + 19315: "keyshadow", + 19398: "mtrgtrans", + 19410: "hp-sco", + 19411: "hp-sca", + 19412: "hp-sessmon", + 19539: "fxuptp", + 19540: "sxuptp", + 19541: "jcp", + 19998: "iec-104-sec", + 19999: "dnp-sec", + 20000: "dnp", + 20001: "microsan", + 20002: "commtact-http", + 20003: "commtact-https", + 20005: "openwebnet", + 20013: "ss-idi", + 20014: "opendeploy", + 20034: "nburn-id", + 20046: "tmophl7mts", + 20048: "mountd", + 20049: "nfsrdma", + 20057: "avesterra", + 20167: "tolfab", + 20202: "ipdtp-port", + 20222: "ipulse-ics", + 20480: "emwavemsg", + 20670: "track", + 20999: "athand-mmp", + 21000: "irtrans", + 21010: "notezilla-lan", + 21221: "aigairserver", + 21553: "rdm-tfs", + 21554: "dfserver", + 21590: "vofr-gateway", + 21800: "tvpm", + 21845: "webphone", + 21846: "netspeak-is", + 21847: "netspeak-cs", + 21848: "netspeak-acd", + 21849: "netspeak-cps", + 22000: "snapenetio", + 22001: "optocontrol", + 22002: "optohost002", + 22003: "optohost003", + 22004: "optohost004", + 22005: "optohost004", + 22125: "dcap", + 22128: "gsidcap", + 22222: "easyengine", + 22273: "wnn6", + 22305: "cis", + 22335: "shrewd-control", + 22343: "cis-secure", + 22347: "wibukey", + 22350: "codemeter", + 22351: "codemeter-cmwan", + 22537: "caldsoft-backup", + 22555: "vocaltec-wconf", + 22763: "talikaserver", + 22800: "aws-brf", + 22951: "brf-gw", + 23000: "inovaport1", + 23001: "inovaport2", + 23002: "inovaport3", + 23003: "inovaport4", + 23004: "inovaport5", + 23005: "inovaport6", + 23053: "gntp", + 23294: "5afe-dir", + 23333: "elxmgmt", + 23400: "novar-dbase", + 23401: "novar-alarm", + 23402: "novar-global", + 23456: "aequus", + 23457: "aequus-alt", + 23546: "areaguard-neo", + 24000: "med-ltp", + 24001: "med-fsp-rx", + 24002: "med-fsp-tx", + 24003: "med-supp", + 24004: "med-ovw", + 24005: "med-ci", + 24006: "med-net-svc", + 24242: "filesphere", + 24249: "vista-4gl", + 24321: "ild", + 24386: "intel-rci", + 24465: "tonidods", + 24554: "binkp", + 24577: "bilobit", + 24666: "sdtvwcam", + 24676: "canditv", + 24677: "flashfiler", + 24678: "proactivate", + 24680: "tcc-http", + 24754: "cslg", + 24922: "find", + 25000: "icl-twobase1", + 25001: "icl-twobase2", + 25002: "icl-twobase3", + 25003: "icl-twobase4", + 25004: "icl-twobase5", + 25005: "icl-twobase6", + 25006: "icl-twobase7", + 25007: "icl-twobase8", + 25008: "icl-twobase9", + 25009: "icl-twobase10", + 25576: "sauterdongle", + 25604: "idtp", + 25793: "vocaltec-hos", + 25900: "tasp-net", + 25901: "niobserver", + 25902: "nilinkanalyst", + 25903: "niprobe", + 26000: "quake", + 26133: "scscp", + 26208: "wnn6-ds", + 26257: "cockroach", + 26260: "ezproxy", + 26261: "ezmeeting", + 26262: "k3software-svr", + 26263: "k3software-cli", + 26486: "exoline-tcp", + 26487: "exoconfig", + 26489: "exonet", + 27345: "imagepump", + 27442: "jesmsjc", + 27504: "kopek-httphead", + 27782: "ars-vista", + 27876: "astrolink", + 27999: "tw-auth-key", + 28000: "nxlmd", + 28001: "pqsp", + 28200: "voxelstorm", + 28240: "siemensgsm", + 28589: "bosswave", + 29167: "otmp", + 29999: "bingbang", + 30000: "ndmps", + 30001: "pago-services1", + 30002: "pago-services2", + 30003: "amicon-fpsu-ra", + 30100: "rwp", + 30260: "kingdomsonline", + 30400: "gs-realtime", + 30999: "ovobs", + 31016: "ka-sddp", + 31020: "autotrac-acp", + 31400: "pace-licensed", + 31416: "xqosd", + 31457: "tetrinet", + 31620: "lm-mon", + 31685: "dsx-monitor", + 31765: "gamesmith-port", + 31948: "iceedcp-tx", + 31949: "iceedcp-rx", + 32034: "iracinghelper", + 32249: "t1distproc60", + 32400: "plex", + 32483: "apm-link", + 32635: "sec-ntb-clnt", + 32636: "DMExpress", + 32767: "filenet-powsrm", + 32768: "filenet-tms", + 32769: "filenet-rpc", + 32770: "filenet-nch", + 32771: "filenet-rmi", + 32772: "filenet-pa", + 32773: "filenet-cm", + 32774: "filenet-re", + 32775: "filenet-pch", + 32776: "filenet-peior", + 32777: "filenet-obrok", + 32801: "mlsn", + 32811: "retp", + 32896: "idmgratm", + 33060: "mysqlx", + 33123: "aurora-balaena", + 33331: "diamondport", + 33333: "dgi-serv", + 33334: "speedtrace", + 33434: "traceroute", + 33656: "snip-slave", + 34249: "turbonote-2", + 34378: "p-net-local", + 34379: "p-net-remote", + 34567: "dhanalakshmi", + 34962: "profinet-rt", + 34963: "profinet-rtm", + 34964: "profinet-cm", + 34980: "ethercat", + 35000: "heathview", + 35001: "rt-viewer", + 35002: "rt-sound", + 35003: "rt-devicemapper", + 35004: "rt-classmanager", + 35005: "rt-labtracker", + 35006: "rt-helper", + 35100: "axio-disc", + 35354: "kitim", + 35355: "altova-lm", + 35356: "guttersnex", + 35357: "openstack-id", + 36001: "allpeers", + 36524: "febooti-aw", + 36602: "observium-agent", + 36700: "mapx", + 36865: "kastenxpipe", + 37475: "neckar", + 37483: "gdrive-sync", + 37601: "eftp", + 37654: "unisys-eportal", + 38000: "ivs-database", + 38001: "ivs-insertion", + 38002: "cresco-control", + 38201: "galaxy7-data", + 38202: "fairview", + 38203: "agpolicy", + 38800: "sruth", + 38865: "secrmmsafecopya", + 39681: "turbonote-1", + 40000: "safetynetp", + 40404: "sptx", + 40841: "cscp", + 40842: "csccredir", + 40843: "csccfirewall", + 41111: "fs-qos", + 41121: "tentacle", + 41230: "z-wave-s", + 41794: "crestron-cip", + 41795: "crestron-ctp", + 41796: "crestron-cips", + 41797: "crestron-ctps", + 42508: "candp", + 42509: "candrp", + 42510: "caerpc", + 43000: "recvr-rc", + 43188: "reachout", + 43189: "ndm-agent-port", + 43190: "ip-provision", + 43191: "noit-transport", + 43210: "shaperai", + 43439: "eq3-update", + 43440: "ew-mgmt", + 43441: "ciscocsdb", + 44123: "z-wave-tunnel", + 44321: "pmcd", + 44322: "pmcdproxy", + 44323: "pmwebapi", + 44444: "cognex-dataman", + 44553: "rbr-debug", + 44818: "EtherNet-IP-2", + 44900: "m3da", + 45000: "asmp", + 45001: "asmps", + 45002: "rs-status", + 45045: "synctest", + 45054: "invision-ag", + 45514: "cloudcheck", + 45678: "eba", + 45824: "dai-shell", + 45825: "qdb2service", + 45966: "ssr-servermgr", + 46336: "inedo", + 46998: "spremotetablet", + 46999: "mediabox", + 47000: "mbus", + 47001: "winrm", + 47557: "dbbrowse", + 47624: "directplaysrvr", + 47806: "ap", + 47808: "bacnet", + 48000: "nimcontroller", + 48001: "nimspooler", + 48002: "nimhub", + 48003: "nimgtw", + 48004: "nimbusdb", + 48005: "nimbusdbctrl", + 48049: "3gpp-cbsp", + 48050: "weandsf", + 48128: "isnetserv", + 48129: "blp5", + 48556: "com-bardac-dw", + 48619: "iqobject", + 48653: "robotraconteur", + 49000: "matahari", + 49001: "nusrp", +} +var udpPortNames = map[UDPPort]string{ + 1: "tcpmux", + 2: "compressnet", + 3: "compressnet", + 5: "rje", + 7: "echo", + 9: "discard", + 11: "systat", + 13: "daytime", + 17: "qotd", + 18: "msp", + 19: "chargen", + 20: "ftp-data", + 21: "ftp", + 22: "ssh", + 23: "telnet", + 25: "smtp", + 27: "nsw-fe", + 29: "msg-icp", + 31: "msg-auth", + 33: "dsp", + 37: "time", + 38: "rap", + 39: "rlp", + 41: "graphics", + 42: "name", + 43: "nicname", + 44: "mpm-flags", + 45: "mpm", + 46: "mpm-snd", + 48: "auditd", + 49: "tacacs", + 50: "re-mail-ck", + 52: "xns-time", + 53: "domain", + 54: "xns-ch", + 55: "isi-gl", + 56: "xns-auth", + 58: "xns-mail", + 62: "acas", + 63: "whoispp", + 64: "covia", + 65: "tacacs-ds", + 66: "sql-net", + 67: "bootps", + 68: "bootpc", + 69: "tftp", + 70: "gopher", + 71: "netrjs-1", + 72: "netrjs-2", + 73: "netrjs-3", + 74: "netrjs-4", + 76: "deos", + 78: "vettcp", + 79: "finger", + 80: "http", + 82: "xfer", + 83: "mit-ml-dev", + 84: "ctf", + 85: "mit-ml-dev", + 86: "mfcobol", + 88: "kerberos", + 89: "su-mit-tg", + 90: "dnsix", + 91: "mit-dov", + 92: "npp", + 93: "dcp", + 94: "objcall", + 95: "supdup", + 96: "dixie", + 97: "swift-rvf", + 98: "tacnews", + 99: "metagram", + 101: "hostname", + 102: "iso-tsap", + 103: "gppitnp", + 104: "acr-nema", + 105: "cso", + 106: "3com-tsmux", + 107: "rtelnet", + 108: "snagas", + 109: "pop2", + 110: "pop3", + 111: "sunrpc", + 112: "mcidas", + 113: "auth", + 115: "sftp", + 116: "ansanotify", + 117: "uucp-path", + 118: "sqlserv", + 119: "nntp", + 120: "cfdptkt", + 121: "erpc", + 122: "smakynet", + 123: "ntp", + 124: "ansatrader", + 125: "locus-map", + 126: "nxedit", + 127: "locus-con", + 128: "gss-xlicen", + 129: "pwdgen", + 130: "cisco-fna", + 131: "cisco-tna", + 132: "cisco-sys", + 133: "statsrv", + 134: "ingres-net", + 135: "epmap", + 136: "profile", + 137: "netbios-ns", + 138: "netbios-dgm", + 139: "netbios-ssn", + 140: "emfis-data", + 141: "emfis-cntl", + 142: "bl-idm", + 143: "imap", + 144: "uma", + 145: "uaac", + 146: "iso-tp0", + 147: "iso-ip", + 148: "jargon", + 149: "aed-512", + 150: "sql-net", + 151: "hems", + 152: "bftp", + 153: "sgmp", + 154: "netsc-prod", + 155: "netsc-dev", + 156: "sqlsrv", + 157: "knet-cmp", + 158: "pcmail-srv", + 159: "nss-routing", + 160: "sgmp-traps", + 161: "snmp", + 162: "snmptrap", + 163: "cmip-man", + 164: "cmip-agent", + 165: "xns-courier", + 166: "s-net", + 167: "namp", + 168: "rsvd", + 169: "send", + 170: "print-srv", + 171: "multiplex", + 172: "cl-1", + 173: "xyplex-mux", + 174: "mailq", + 175: "vmnet", + 176: "genrad-mux", + 177: "xdmcp", + 178: "nextstep", + 179: "bgp", + 180: "ris", + 181: "unify", + 182: "audit", + 183: "ocbinder", + 184: "ocserver", + 185: "remote-kis", + 186: "kis", + 187: "aci", + 188: "mumps", + 189: "qft", + 190: "gacp", + 191: "prospero", + 192: "osu-nms", + 193: "srmp", + 194: "irc", + 195: "dn6-nlm-aud", + 196: "dn6-smm-red", + 197: "dls", + 198: "dls-mon", + 199: "smux", + 200: "src", + 201: "at-rtmp", + 202: "at-nbp", + 203: "at-3", + 204: "at-echo", + 205: "at-5", + 206: "at-zis", + 207: "at-7", + 208: "at-8", + 209: "qmtp", + 210: "z39-50", + 211: "914c-g", + 212: "anet", + 213: "ipx", + 214: "vmpwscs", + 215: "softpc", + 216: "CAIlic", + 217: "dbase", + 218: "mpp", + 219: "uarps", + 220: "imap3", + 221: "fln-spx", + 222: "rsh-spx", + 223: "cdc", + 224: "masqdialer", + 242: "direct", + 243: "sur-meas", + 244: "inbusiness", + 245: "link", + 246: "dsp3270", + 247: "subntbcst-tftp", + 248: "bhfhs", + 256: "rap", + 257: "set", + 259: "esro-gen", + 260: "openport", + 261: "nsiiops", + 262: "arcisdms", + 263: "hdap", + 264: "bgmp", + 265: "x-bone-ctl", + 266: "sst", + 267: "td-service", + 268: "td-replica", + 269: "manet", + 270: "gist", + 280: "http-mgmt", + 281: "personal-link", + 282: "cableport-ax", + 283: "rescap", + 284: "corerjd", + 286: "fxp", + 287: "k-block", + 308: "novastorbakcup", + 309: "entrusttime", + 310: "bhmds", + 311: "asip-webadmin", + 312: "vslmp", + 313: "magenta-logic", + 314: "opalis-robot", + 315: "dpsi", + 316: "decauth", + 317: "zannet", + 318: "pkix-timestamp", + 319: "ptp-event", + 320: "ptp-general", + 321: "pip", + 322: "rtsps", + 333: "texar", + 344: "pdap", + 345: "pawserv", + 346: "zserv", + 347: "fatserv", + 348: "csi-sgwp", + 349: "mftp", + 350: "matip-type-a", + 351: "matip-type-b", + 352: "dtag-ste-sb", + 353: "ndsauth", + 354: "bh611", + 355: "datex-asn", + 356: "cloanto-net-1", + 357: "bhevent", + 358: "shrinkwrap", + 359: "nsrmp", + 360: "scoi2odialog", + 361: "semantix", + 362: "srssend", + 363: "rsvp-tunnel", + 364: "aurora-cmgr", + 365: "dtk", + 366: "odmr", + 367: "mortgageware", + 368: "qbikgdp", + 369: "rpc2portmap", + 370: "codaauth2", + 371: "clearcase", + 372: "ulistproc", + 373: "legent-1", + 374: "legent-2", + 375: "hassle", + 376: "nip", + 377: "tnETOS", + 378: "dsETOS", + 379: "is99c", + 380: "is99s", + 381: "hp-collector", + 382: "hp-managed-node", + 383: "hp-alarm-mgr", + 384: "arns", + 385: "ibm-app", + 386: "asa", + 387: "aurp", + 388: "unidata-ldm", + 389: "ldap", + 390: "uis", + 391: "synotics-relay", + 392: "synotics-broker", + 393: "meta5", + 394: "embl-ndt", + 395: "netcp", + 396: "netware-ip", + 397: "mptn", + 398: "kryptolan", + 399: "iso-tsap-c2", + 400: "osb-sd", + 401: "ups", + 402: "genie", + 403: "decap", + 404: "nced", + 405: "ncld", + 406: "imsp", + 407: "timbuktu", + 408: "prm-sm", + 409: "prm-nm", + 410: "decladebug", + 411: "rmt", + 412: "synoptics-trap", + 413: "smsp", + 414: "infoseek", + 415: "bnet", + 416: "silverplatter", + 417: "onmux", + 418: "hyper-g", + 419: "ariel1", + 420: "smpte", + 421: "ariel2", + 422: "ariel3", + 423: "opc-job-start", + 424: "opc-job-track", + 425: "icad-el", + 426: "smartsdp", + 427: "svrloc", + 428: "ocs-cmu", + 429: "ocs-amu", + 430: "utmpsd", + 431: "utmpcd", + 432: "iasd", + 433: "nnsp", + 434: "mobileip-agent", + 435: "mobilip-mn", + 436: "dna-cml", + 437: "comscm", + 438: "dsfgw", + 439: "dasp", + 440: "sgcp", + 441: "decvms-sysmgt", + 442: "cvc-hostd", + 443: "https", + 444: "snpp", + 445: "microsoft-ds", + 446: "ddm-rdb", + 447: "ddm-dfm", + 448: "ddm-ssl", + 449: "as-servermap", + 450: "tserver", + 451: "sfs-smp-net", + 452: "sfs-config", + 453: "creativeserver", + 454: "contentserver", + 455: "creativepartnr", + 456: "macon-udp", + 457: "scohelp", + 458: "appleqtc", + 459: "ampr-rcmd", + 460: "skronk", + 461: "datasurfsrv", + 462: "datasurfsrvsec", + 463: "alpes", + 464: "kpasswd", + 465: "igmpv3lite", + 466: "digital-vrc", + 467: "mylex-mapd", + 468: "photuris", + 469: "rcp", + 470: "scx-proxy", + 471: "mondex", + 472: "ljk-login", + 473: "hybrid-pop", + 474: "tn-tl-w2", + 475: "tcpnethaspsrv", + 476: "tn-tl-fd1", + 477: "ss7ns", + 478: "spsc", + 479: "iafserver", + 480: "iafdbase", + 481: "ph", + 482: "bgs-nsi", + 483: "ulpnet", + 484: "integra-sme", + 485: "powerburst", + 486: "avian", + 487: "saft", + 488: "gss-http", + 489: "nest-protocol", + 490: "micom-pfs", + 491: "go-login", + 492: "ticf-1", + 493: "ticf-2", + 494: "pov-ray", + 495: "intecourier", + 496: "pim-rp-disc", + 497: "retrospect", + 498: "siam", + 499: "iso-ill", + 500: "isakmp", + 501: "stmf", + 502: "mbap", + 503: "intrinsa", + 504: "citadel", + 505: "mailbox-lm", + 506: "ohimsrv", + 507: "crs", + 508: "xvttp", + 509: "snare", + 510: "fcp", + 511: "passgo", + 512: "comsat", + 513: "who", + 514: "syslog", + 515: "printer", + 516: "videotex", + 517: "talk", + 518: "ntalk", + 519: "utime", + 520: "router", + 521: "ripng", + 522: "ulp", + 523: "ibm-db2", + 524: "ncp", + 525: "timed", + 526: "tempo", + 527: "stx", + 528: "custix", + 529: "irc-serv", + 530: "courier", + 531: "conference", + 532: "netnews", + 533: "netwall", + 534: "windream", + 535: "iiop", + 536: "opalis-rdv", + 537: "nmsp", + 538: "gdomap", + 539: "apertus-ldp", + 540: "uucp", + 541: "uucp-rlogin", + 542: "commerce", + 543: "klogin", + 544: "kshell", + 545: "appleqtcsrvr", + 546: "dhcpv6-client", + 547: "dhcpv6-server", + 548: "afpovertcp", + 549: "idfp", + 550: "new-rwho", + 551: "cybercash", + 552: "devshr-nts", + 553: "pirp", + 554: "rtsp", + 555: "dsf", + 556: "remotefs", + 557: "openvms-sysipc", + 558: "sdnskmp", + 559: "teedtap", + 560: "rmonitor", + 561: "monitor", + 562: "chshell", + 563: "nntps", + 564: "9pfs", + 565: "whoami", + 566: "streettalk", + 567: "banyan-rpc", + 568: "ms-shuttle", + 569: "ms-rome", + 570: "meter", + 571: "meter", + 572: "sonar", + 573: "banyan-vip", + 574: "ftp-agent", + 575: "vemmi", + 576: "ipcd", + 577: "vnas", + 578: "ipdd", + 579: "decbsrv", + 580: "sntp-heartbeat", + 581: "bdp", + 582: "scc-security", + 583: "philips-vc", + 584: "keyserver", + 586: "password-chg", + 587: "submission", + 588: "cal", + 589: "eyelink", + 590: "tns-cml", + 591: "http-alt", + 592: "eudora-set", + 593: "http-rpc-epmap", + 594: "tpip", + 595: "cab-protocol", + 596: "smsd", + 597: "ptcnameservice", + 598: "sco-websrvrmg3", + 599: "acp", + 600: "ipcserver", + 601: "syslog-conn", + 602: "xmlrpc-beep", + 603: "idxp", + 604: "tunnel", + 605: "soap-beep", + 606: "urm", + 607: "nqs", + 608: "sift-uft", + 609: "npmp-trap", + 610: "npmp-local", + 611: "npmp-gui", + 612: "hmmp-ind", + 613: "hmmp-op", + 614: "sshell", + 615: "sco-inetmgr", + 616: "sco-sysmgr", + 617: "sco-dtmgr", + 618: "dei-icda", + 619: "compaq-evm", + 620: "sco-websrvrmgr", + 621: "escp-ip", + 622: "collaborator", + 623: "asf-rmcp", + 624: "cryptoadmin", + 625: "dec-dlm", + 626: "asia", + 627: "passgo-tivoli", + 628: "qmqp", + 629: "3com-amp3", + 630: "rda", + 631: "ipp", + 632: "bmpp", + 633: "servstat", + 634: "ginad", + 635: "rlzdbase", + 636: "ldaps", + 637: "lanserver", + 638: "mcns-sec", + 639: "msdp", + 640: "entrust-sps", + 641: "repcmd", + 642: "esro-emsdp", + 643: "sanity", + 644: "dwr", + 645: "pssc", + 646: "ldp", + 647: "dhcp-failover", + 648: "rrp", + 649: "cadview-3d", + 650: "obex", + 651: "ieee-mms", + 652: "hello-port", + 653: "repscmd", + 654: "aodv", + 655: "tinc", + 656: "spmp", + 657: "rmc", + 658: "tenfold", + 660: "mac-srvr-admin", + 661: "hap", + 662: "pftp", + 663: "purenoise", + 664: "asf-secure-rmcp", + 665: "sun-dr", + 666: "mdqs", + 667: "disclose", + 668: "mecomm", + 669: "meregister", + 670: "vacdsm-sws", + 671: "vacdsm-app", + 672: "vpps-qua", + 673: "cimplex", + 674: "acap", + 675: "dctp", + 676: "vpps-via", + 677: "vpp", + 678: "ggf-ncp", + 679: "mrm", + 680: "entrust-aaas", + 681: "entrust-aams", + 682: "xfr", + 683: "corba-iiop", + 684: "corba-iiop-ssl", + 685: "mdc-portmapper", + 686: "hcp-wismar", + 687: "asipregistry", + 688: "realm-rusd", + 689: "nmap", + 690: "vatp", + 691: "msexch-routing", + 692: "hyperwave-isp", + 693: "connendp", + 694: "ha-cluster", + 695: "ieee-mms-ssl", + 696: "rushd", + 697: "uuidgen", + 698: "olsr", + 699: "accessnetwork", + 700: "epp", + 701: "lmp", + 702: "iris-beep", + 704: "elcsd", + 705: "agentx", + 706: "silc", + 707: "borland-dsj", + 709: "entrust-kmsh", + 710: "entrust-ash", + 711: "cisco-tdp", + 712: "tbrpf", + 713: "iris-xpc", + 714: "iris-xpcs", + 715: "iris-lwz", + 716: "pana", + 729: "netviewdm1", + 730: "netviewdm2", + 731: "netviewdm3", + 741: "netgw", + 742: "netrcs", + 744: "flexlm", + 747: "fujitsu-dev", + 748: "ris-cm", + 749: "kerberos-adm", + 750: "loadav", + 751: "pump", + 752: "qrh", + 753: "rrh", + 754: "tell", + 758: "nlogin", + 759: "con", + 760: "ns", + 761: "rxe", + 762: "quotad", + 763: "cycleserv", + 764: "omserv", + 765: "webster", + 767: "phonebook", + 769: "vid", + 770: "cadlock", + 771: "rtip", + 772: "cycleserv2", + 773: "notify", + 774: "acmaint-dbd", + 775: "acmaint-transd", + 776: "wpages", + 777: "multiling-http", + 780: "wpgs", + 800: "mdbs-daemon", + 801: "device", + 802: "mbap-s", + 810: "fcp-udp", + 828: "itm-mcell-s", + 829: "pkix-3-ca-ra", + 830: "netconf-ssh", + 831: "netconf-beep", + 832: "netconfsoaphttp", + 833: "netconfsoapbeep", + 847: "dhcp-failover2", + 848: "gdoi", + 853: "domain-s", + 854: "dlep", + 860: "iscsi", + 861: "owamp-control", + 862: "twamp-control", + 873: "rsync", + 886: "iclcnet-locate", + 887: "iclcnet-svinfo", + 888: "accessbuilder", + 900: "omginitialrefs", + 901: "smpnameres", + 902: "ideafarm-door", + 903: "ideafarm-panic", + 910: "kink", + 911: "xact-backup", + 912: "apex-mesh", + 913: "apex-edge", + 989: "ftps-data", + 990: "ftps", + 991: "nas", + 992: "telnets", + 993: "imaps", + 995: "pop3s", + 996: "vsinet", + 997: "maitrd", + 998: "puparp", + 999: "applix", + 1000: "cadlock2", + 1010: "surf", + 1021: "exp1", + 1022: "exp2", + 1025: "blackjack", + 1026: "cap", + 1027: "6a44", + 1029: "solid-mux", + 1033: "netinfo-local", + 1034: "activesync", + 1035: "mxxrlogin", + 1036: "nsstp", + 1037: "ams", + 1038: "mtqp", + 1039: "sbl", + 1040: "netarx", + 1041: "danf-ak2", + 1042: "afrog", + 1043: "boinc-client", + 1044: "dcutility", + 1045: "fpitp", + 1046: "wfremotertm", + 1047: "neod1", + 1048: "neod2", + 1049: "td-postman", + 1050: "cma", + 1051: "optima-vnet", + 1052: "ddt", + 1053: "remote-as", + 1054: "brvread", + 1055: "ansyslmd", + 1056: "vfo", + 1057: "startron", + 1058: "nim", + 1059: "nimreg", + 1060: "polestar", + 1061: "kiosk", + 1062: "veracity", + 1063: "kyoceranetdev", + 1064: "jstel", + 1065: "syscomlan", + 1066: "fpo-fns", + 1067: "instl-boots", + 1068: "instl-bootc", + 1069: "cognex-insight", + 1070: "gmrupdateserv", + 1071: "bsquare-voip", + 1072: "cardax", + 1073: "bridgecontrol", + 1074: "warmspotMgmt", + 1075: "rdrmshc", + 1076: "dab-sti-c", + 1077: "imgames", + 1078: "avocent-proxy", + 1079: "asprovatalk", + 1080: "socks", + 1081: "pvuniwien", + 1082: "amt-esd-prot", + 1083: "ansoft-lm-1", + 1084: "ansoft-lm-2", + 1085: "webobjects", + 1086: "cplscrambler-lg", + 1087: "cplscrambler-in", + 1088: "cplscrambler-al", + 1089: "ff-annunc", + 1090: "ff-fms", + 1091: "ff-sm", + 1092: "obrpd", + 1093: "proofd", + 1094: "rootd", + 1095: "nicelink", + 1096: "cnrprotocol", + 1097: "sunclustermgr", + 1098: "rmiactivation", + 1099: "rmiregistry", + 1100: "mctp", + 1101: "pt2-discover", + 1102: "adobeserver-1", + 1103: "adobeserver-2", + 1104: "xrl", + 1105: "ftranhc", + 1106: "isoipsigport-1", + 1107: "isoipsigport-2", + 1108: "ratio-adp", + 1110: "nfsd-keepalive", + 1111: "lmsocialserver", + 1112: "icp", + 1113: "ltp-deepspace", + 1114: "mini-sql", + 1115: "ardus-trns", + 1116: "ardus-cntl", + 1117: "ardus-mtrns", + 1118: "sacred", + 1119: "bnetgame", + 1120: "bnetfile", + 1121: "rmpp", + 1122: "availant-mgr", + 1123: "murray", + 1124: "hpvmmcontrol", + 1125: "hpvmmagent", + 1126: "hpvmmdata", + 1127: "kwdb-commn", + 1128: "saphostctrl", + 1129: "saphostctrls", + 1130: "casp", + 1131: "caspssl", + 1132: "kvm-via-ip", + 1133: "dfn", + 1134: "aplx", + 1135: "omnivision", + 1136: "hhb-gateway", + 1137: "trim", + 1138: "encrypted-admin", + 1139: "evm", + 1140: "autonoc", + 1141: "mxomss", + 1142: "edtools", + 1143: "imyx", + 1144: "fuscript", + 1145: "x9-icue", + 1146: "audit-transfer", + 1147: "capioverlan", + 1148: "elfiq-repl", + 1149: "bvtsonar", + 1150: "blaze", + 1151: "unizensus", + 1152: "winpoplanmess", + 1153: "c1222-acse", + 1154: "resacommunity", + 1155: "nfa", + 1156: "iascontrol-oms", + 1157: "iascontrol", + 1158: "dbcontrol-oms", + 1159: "oracle-oms", + 1160: "olsv", + 1161: "health-polling", + 1162: "health-trap", + 1163: "sddp", + 1164: "qsm-proxy", + 1165: "qsm-gui", + 1166: "qsm-remote", + 1167: "cisco-ipsla", + 1168: "vchat", + 1169: "tripwire", + 1170: "atc-lm", + 1171: "atc-appserver", + 1172: "dnap", + 1173: "d-cinema-rrp", + 1174: "fnet-remote-ui", + 1175: "dossier", + 1176: "indigo-server", + 1177: "dkmessenger", + 1178: "sgi-storman", + 1179: "b2n", + 1180: "mc-client", + 1181: "3comnetman", + 1182: "accelenet-data", + 1183: "llsurfup-http", + 1184: "llsurfup-https", + 1185: "catchpole", + 1186: "mysql-cluster", + 1187: "alias", + 1188: "hp-webadmin", + 1189: "unet", + 1190: "commlinx-avl", + 1191: "gpfs", + 1192: "caids-sensor", + 1193: "fiveacross", + 1194: "openvpn", + 1195: "rsf-1", + 1196: "netmagic", + 1197: "carrius-rshell", + 1198: "cajo-discovery", + 1199: "dmidi", + 1200: "scol", + 1201: "nucleus-sand", + 1202: "caiccipc", + 1203: "ssslic-mgr", + 1204: "ssslog-mgr", + 1205: "accord-mgc", + 1206: "anthony-data", + 1207: "metasage", + 1208: "seagull-ais", + 1209: "ipcd3", + 1210: "eoss", + 1211: "groove-dpp", + 1212: "lupa", + 1213: "mpc-lifenet", + 1214: "kazaa", + 1215: "scanstat-1", + 1216: "etebac5", + 1217: "hpss-ndapi", + 1218: "aeroflight-ads", + 1219: "aeroflight-ret", + 1220: "qt-serveradmin", + 1221: "sweetware-apps", + 1222: "nerv", + 1223: "tgp", + 1224: "vpnz", + 1225: "slinkysearch", + 1226: "stgxfws", + 1227: "dns2go", + 1228: "florence", + 1229: "zented", + 1230: "periscope", + 1231: "menandmice-lpm", + 1232: "first-defense", + 1233: "univ-appserver", + 1234: "search-agent", + 1235: "mosaicsyssvc1", + 1236: "bvcontrol", + 1237: "tsdos390", + 1238: "hacl-qs", + 1239: "nmsd", + 1240: "instantia", + 1241: "nessus", + 1242: "nmasoverip", + 1243: "serialgateway", + 1244: "isbconference1", + 1245: "isbconference2", + 1246: "payrouter", + 1247: "visionpyramid", + 1248: "hermes", + 1249: "mesavistaco", + 1250: "swldy-sias", + 1251: "servergraph", + 1252: "bspne-pcc", + 1253: "q55-pcc", + 1254: "de-noc", + 1255: "de-cache-query", + 1256: "de-server", + 1257: "shockwave2", + 1258: "opennl", + 1259: "opennl-voice", + 1260: "ibm-ssd", + 1261: "mpshrsv", + 1262: "qnts-orb", + 1263: "dka", + 1264: "prat", + 1265: "dssiapi", + 1266: "dellpwrappks", + 1267: "epc", + 1268: "propel-msgsys", + 1269: "watilapp", + 1270: "opsmgr", + 1271: "excw", + 1272: "cspmlockmgr", + 1273: "emc-gateway", + 1274: "t1distproc", + 1275: "ivcollector", + 1277: "miva-mqs", + 1278: "dellwebadmin-1", + 1279: "dellwebadmin-2", + 1280: "pictrography", + 1281: "healthd", + 1282: "emperion", + 1283: "productinfo", + 1284: "iee-qfx", + 1285: "neoiface", + 1286: "netuitive", + 1287: "routematch", + 1288: "navbuddy", + 1289: "jwalkserver", + 1290: "winjaserver", + 1291: "seagulllms", + 1292: "dsdn", + 1293: "pkt-krb-ipsec", + 1294: "cmmdriver", + 1295: "ehtp", + 1296: "dproxy", + 1297: "sdproxy", + 1298: "lpcp", + 1299: "hp-sci", + 1300: "h323hostcallsc", + 1301: "ci3-software-1", + 1302: "ci3-software-2", + 1303: "sftsrv", + 1304: "boomerang", + 1305: "pe-mike", + 1306: "re-conn-proto", + 1307: "pacmand", + 1308: "odsi", + 1309: "jtag-server", + 1310: "husky", + 1311: "rxmon", + 1312: "sti-envision", + 1313: "bmc-patroldb", + 1314: "pdps", + 1315: "els", + 1316: "exbit-escp", + 1317: "vrts-ipcserver", + 1318: "krb5gatekeeper", + 1319: "amx-icsp", + 1320: "amx-axbnet", + 1321: "pip", + 1322: "novation", + 1323: "brcd", + 1324: "delta-mcp", + 1325: "dx-instrument", + 1326: "wimsic", + 1327: "ultrex", + 1328: "ewall", + 1329: "netdb-export", + 1330: "streetperfect", + 1331: "intersan", + 1332: "pcia-rxp-b", + 1333: "passwrd-policy", + 1334: "writesrv", + 1335: "digital-notary", + 1336: "ischat", + 1337: "menandmice-dns", + 1338: "wmc-log-svc", + 1339: "kjtsiteserver", + 1340: "naap", + 1341: "qubes", + 1342: "esbroker", + 1343: "re101", + 1344: "icap", + 1345: "vpjp", + 1346: "alta-ana-lm", + 1347: "bbn-mmc", + 1348: "bbn-mmx", + 1349: "sbook", + 1350: "editbench", + 1351: "equationbuilder", + 1352: "lotusnote", + 1353: "relief", + 1354: "XSIP-network", + 1355: "intuitive-edge", + 1356: "cuillamartin", + 1357: "pegboard", + 1358: "connlcli", + 1359: "ftsrv", + 1360: "mimer", + 1361: "linx", + 1362: "timeflies", + 1363: "ndm-requester", + 1364: "ndm-server", + 1365: "adapt-sna", + 1366: "netware-csp", + 1367: "dcs", + 1368: "screencast", + 1369: "gv-us", + 1370: "us-gv", + 1371: "fc-cli", + 1372: "fc-ser", + 1373: "chromagrafx", + 1374: "molly", + 1375: "bytex", + 1376: "ibm-pps", + 1377: "cichlid", + 1378: "elan", + 1379: "dbreporter", + 1380: "telesis-licman", + 1381: "apple-licman", + 1382: "udt-os", + 1383: "gwha", + 1384: "os-licman", + 1385: "atex-elmd", + 1386: "checksum", + 1387: "cadsi-lm", + 1388: "objective-dbc", + 1389: "iclpv-dm", + 1390: "iclpv-sc", + 1391: "iclpv-sas", + 1392: "iclpv-pm", + 1393: "iclpv-nls", + 1394: "iclpv-nlc", + 1395: "iclpv-wsm", + 1396: "dvl-activemail", + 1397: "audio-activmail", + 1398: "video-activmail", + 1399: "cadkey-licman", + 1400: "cadkey-tablet", + 1401: "goldleaf-licman", + 1402: "prm-sm-np", + 1403: "prm-nm-np", + 1404: "igi-lm", + 1405: "ibm-res", + 1406: "netlabs-lm", + 1408: "sophia-lm", + 1409: "here-lm", + 1410: "hiq", + 1411: "af", + 1412: "innosys", + 1413: "innosys-acl", + 1414: "ibm-mqseries", + 1415: "dbstar", + 1416: "novell-lu6-2", + 1417: "timbuktu-srv1", + 1418: "timbuktu-srv2", + 1419: "timbuktu-srv3", + 1420: "timbuktu-srv4", + 1421: "gandalf-lm", + 1422: "autodesk-lm", + 1423: "essbase", + 1424: "hybrid", + 1425: "zion-lm", + 1426: "sais", + 1427: "mloadd", + 1428: "informatik-lm", + 1429: "nms", + 1430: "tpdu", + 1431: "rgtp", + 1432: "blueberry-lm", + 1433: "ms-sql-s", + 1434: "ms-sql-m", + 1435: "ibm-cics", + 1436: "saism", + 1437: "tabula", + 1438: "eicon-server", + 1439: "eicon-x25", + 1440: "eicon-slp", + 1441: "cadis-1", + 1442: "cadis-2", + 1443: "ies-lm", + 1444: "marcam-lm", + 1445: "proxima-lm", + 1446: "ora-lm", + 1447: "apri-lm", + 1448: "oc-lm", + 1449: "peport", + 1450: "dwf", + 1451: "infoman", + 1452: "gtegsc-lm", + 1453: "genie-lm", + 1454: "interhdl-elmd", + 1455: "esl-lm", + 1456: "dca", + 1457: "valisys-lm", + 1458: "nrcabq-lm", + 1459: "proshare1", + 1460: "proshare2", + 1461: "ibm-wrless-lan", + 1462: "world-lm", + 1463: "nucleus", + 1464: "msl-lmd", + 1465: "pipes", + 1466: "oceansoft-lm", + 1467: "csdmbase", + 1468: "csdm", + 1469: "aal-lm", + 1470: "uaiact", + 1471: "csdmbase", + 1472: "csdm", + 1473: "openmath", + 1474: "telefinder", + 1475: "taligent-lm", + 1476: "clvm-cfg", + 1477: "ms-sna-server", + 1478: "ms-sna-base", + 1479: "dberegister", + 1480: "pacerforum", + 1481: "airs", + 1482: "miteksys-lm", + 1483: "afs", + 1484: "confluent", + 1485: "lansource", + 1486: "nms-topo-serv", + 1487: "localinfosrvr", + 1488: "docstor", + 1489: "dmdocbroker", + 1490: "insitu-conf", + 1492: "stone-design-1", + 1493: "netmap-lm", + 1494: "ica", + 1495: "cvc", + 1496: "liberty-lm", + 1497: "rfx-lm", + 1498: "sybase-sqlany", + 1499: "fhc", + 1500: "vlsi-lm", + 1501: "saiscm", + 1502: "shivadiscovery", + 1503: "imtc-mcs", + 1504: "evb-elm", + 1505: "funkproxy", + 1506: "utcd", + 1507: "symplex", + 1508: "diagmond", + 1509: "robcad-lm", + 1510: "mvx-lm", + 1511: "3l-l1", + 1512: "wins", + 1513: "fujitsu-dtc", + 1514: "fujitsu-dtcns", + 1515: "ifor-protocol", + 1516: "vpad", + 1517: "vpac", + 1518: "vpvd", + 1519: "vpvc", + 1520: "atm-zip-office", + 1521: "ncube-lm", + 1522: "ricardo-lm", + 1523: "cichild-lm", + 1524: "ingreslock", + 1525: "orasrv", + 1526: "pdap-np", + 1527: "tlisrv", + 1528: "ngr-t", + 1529: "coauthor", + 1530: "rap-service", + 1531: "rap-listen", + 1532: "miroconnect", + 1533: "virtual-places", + 1534: "micromuse-lm", + 1535: "ampr-info", + 1536: "ampr-inter", + 1537: "sdsc-lm", + 1538: "3ds-lm", + 1539: "intellistor-lm", + 1540: "rds", + 1541: "rds2", + 1542: "gridgen-elmd", + 1543: "simba-cs", + 1544: "aspeclmd", + 1545: "vistium-share", + 1546: "abbaccuray", + 1547: "laplink", + 1548: "axon-lm", + 1549: "shivasound", + 1550: "3m-image-lm", + 1551: "hecmtl-db", + 1552: "pciarray", + 1553: "sna-cs", + 1554: "caci-lm", + 1555: "livelan", + 1556: "veritas-pbx", + 1557: "arbortext-lm", + 1558: "xingmpeg", + 1559: "web2host", + 1560: "asci-val", + 1561: "facilityview", + 1562: "pconnectmgr", + 1563: "cadabra-lm", + 1564: "pay-per-view", + 1565: "winddlb", + 1566: "corelvideo", + 1567: "jlicelmd", + 1568: "tsspmap", + 1569: "ets", + 1570: "orbixd", + 1571: "rdb-dbs-disp", + 1572: "chip-lm", + 1573: "itscomm-ns", + 1574: "mvel-lm", + 1575: "oraclenames", + 1576: "moldflow-lm", + 1577: "hypercube-lm", + 1578: "jacobus-lm", + 1579: "ioc-sea-lm", + 1580: "tn-tl-r2", + 1581: "mil-2045-47001", + 1582: "msims", + 1583: "simbaexpress", + 1584: "tn-tl-fd2", + 1585: "intv", + 1586: "ibm-abtact", + 1587: "pra-elmd", + 1588: "triquest-lm", + 1589: "vqp", + 1590: "gemini-lm", + 1591: "ncpm-pm", + 1592: "commonspace", + 1593: "mainsoft-lm", + 1594: "sixtrak", + 1595: "radio", + 1596: "radio-bc", + 1597: "orbplus-iiop", + 1598: "picknfs", + 1599: "simbaservices", + 1600: "issd", + 1601: "aas", + 1602: "inspect", + 1603: "picodbc", + 1604: "icabrowser", + 1605: "slp", + 1606: "slm-api", + 1607: "stt", + 1608: "smart-lm", + 1609: "isysg-lm", + 1610: "taurus-wh", + 1611: "ill", + 1612: "netbill-trans", + 1613: "netbill-keyrep", + 1614: "netbill-cred", + 1615: "netbill-auth", + 1616: "netbill-prod", + 1617: "nimrod-agent", + 1618: "skytelnet", + 1619: "xs-openstorage", + 1620: "faxportwinport", + 1621: "softdataphone", + 1622: "ontime", + 1623: "jaleosnd", + 1624: "udp-sr-port", + 1625: "svs-omagent", + 1626: "shockwave", + 1627: "t128-gateway", + 1628: "lontalk-norm", + 1629: "lontalk-urgnt", + 1630: "oraclenet8cman", + 1631: "visitview", + 1632: "pammratc", + 1633: "pammrpc", + 1634: "loaprobe", + 1635: "edb-server1", + 1636: "isdc", + 1637: "islc", + 1638: "ismc", + 1639: "cert-initiator", + 1640: "cert-responder", + 1641: "invision", + 1642: "isis-am", + 1643: "isis-ambc", + 1644: "saiseh", + 1645: "sightline", + 1646: "sa-msg-port", + 1647: "rsap", + 1648: "concurrent-lm", + 1649: "kermit", + 1650: "nkd", + 1651: "shiva-confsrvr", + 1652: "xnmp", + 1653: "alphatech-lm", + 1654: "stargatealerts", + 1655: "dec-mbadmin", + 1656: "dec-mbadmin-h", + 1657: "fujitsu-mmpdc", + 1658: "sixnetudr", + 1659: "sg-lm", + 1660: "skip-mc-gikreq", + 1661: "netview-aix-1", + 1662: "netview-aix-2", + 1663: "netview-aix-3", + 1664: "netview-aix-4", + 1665: "netview-aix-5", + 1666: "netview-aix-6", + 1667: "netview-aix-7", + 1668: "netview-aix-8", + 1669: "netview-aix-9", + 1670: "netview-aix-10", + 1671: "netview-aix-11", + 1672: "netview-aix-12", + 1673: "proshare-mc-1", + 1674: "proshare-mc-2", + 1675: "pdp", + 1676: "netcomm2", + 1677: "groupwise", + 1678: "prolink", + 1679: "darcorp-lm", + 1680: "microcom-sbp", + 1681: "sd-elmd", + 1682: "lanyon-lantern", + 1683: "ncpm-hip", + 1684: "snaresecure", + 1685: "n2nremote", + 1686: "cvmon", + 1687: "nsjtp-ctrl", + 1688: "nsjtp-data", + 1689: "firefox", + 1690: "ng-umds", + 1691: "empire-empuma", + 1692: "sstsys-lm", + 1693: "rrirtr", + 1694: "rrimwm", + 1695: "rrilwm", + 1696: "rrifmm", + 1697: "rrisat", + 1698: "rsvp-encap-1", + 1699: "rsvp-encap-2", + 1700: "mps-raft", + 1701: "l2f", + 1702: "deskshare", + 1703: "hb-engine", + 1704: "bcs-broker", + 1705: "slingshot", + 1706: "jetform", + 1707: "vdmplay", + 1708: "gat-lmd", + 1709: "centra", + 1710: "impera", + 1711: "pptconference", + 1712: "registrar", + 1713: "conferencetalk", + 1714: "sesi-lm", + 1715: "houdini-lm", + 1716: "xmsg", + 1717: "fj-hdnet", + 1718: "h323gatedisc", + 1719: "h323gatestat", + 1720: "h323hostcall", + 1721: "caicci", + 1722: "hks-lm", + 1723: "pptp", + 1724: "csbphonemaster", + 1725: "iden-ralp", + 1726: "iberiagames", + 1727: "winddx", + 1728: "telindus", + 1729: "citynl", + 1730: "roketz", + 1731: "msiccp", + 1732: "proxim", + 1733: "siipat", + 1734: "cambertx-lm", + 1735: "privatechat", + 1736: "street-stream", + 1737: "ultimad", + 1738: "gamegen1", + 1739: "webaccess", + 1740: "encore", + 1741: "cisco-net-mgmt", + 1742: "3Com-nsd", + 1743: "cinegrfx-lm", + 1744: "ncpm-ft", + 1745: "remote-winsock", + 1746: "ftrapid-1", + 1747: "ftrapid-2", + 1748: "oracle-em1", + 1749: "aspen-services", + 1750: "sslp", + 1751: "swiftnet", + 1752: "lofr-lm", + 1754: "oracle-em2", + 1755: "ms-streaming", + 1756: "capfast-lmd", + 1757: "cnhrp", + 1758: "tftp-mcast", + 1759: "spss-lm", + 1760: "www-ldap-gw", + 1761: "cft-0", + 1762: "cft-1", + 1763: "cft-2", + 1764: "cft-3", + 1765: "cft-4", + 1766: "cft-5", + 1767: "cft-6", + 1768: "cft-7", + 1769: "bmc-net-adm", + 1770: "bmc-net-svc", + 1771: "vaultbase", + 1772: "essweb-gw", + 1773: "kmscontrol", + 1774: "global-dtserv", + 1776: "femis", + 1777: "powerguardian", + 1778: "prodigy-intrnet", + 1779: "pharmasoft", + 1780: "dpkeyserv", + 1781: "answersoft-lm", + 1782: "hp-hcip", + 1784: "finle-lm", + 1785: "windlm", + 1786: "funk-logger", + 1787: "funk-license", + 1788: "psmond", + 1789: "hello", + 1790: "nmsp", + 1791: "ea1", + 1792: "ibm-dt-2", + 1793: "rsc-robot", + 1794: "cera-bcm", + 1795: "dpi-proxy", + 1796: "vocaltec-admin", + 1797: "uma", + 1798: "etp", + 1799: "netrisk", + 1800: "ansys-lm", + 1801: "msmq", + 1802: "concomp1", + 1803: "hp-hcip-gwy", + 1804: "enl", + 1805: "enl-name", + 1806: "musiconline", + 1807: "fhsp", + 1808: "oracle-vp2", + 1809: "oracle-vp1", + 1810: "jerand-lm", + 1811: "scientia-sdb", + 1812: "radius", + 1813: "radius-acct", + 1814: "tdp-suite", + 1815: "mmpft", + 1816: "harp", + 1817: "rkb-oscs", + 1818: "etftp", + 1819: "plato-lm", + 1820: "mcagent", + 1821: "donnyworld", + 1822: "es-elmd", + 1823: "unisys-lm", + 1824: "metrics-pas", + 1825: "direcpc-video", + 1826: "ardt", + 1827: "asi", + 1828: "itm-mcell-u", + 1829: "optika-emedia", + 1830: "net8-cman", + 1831: "myrtle", + 1832: "tht-treasure", + 1833: "udpradio", + 1834: "ardusuni", + 1835: "ardusmul", + 1836: "ste-smsc", + 1837: "csoft1", + 1838: "talnet", + 1839: "netopia-vo1", + 1840: "netopia-vo2", + 1841: "netopia-vo3", + 1842: "netopia-vo4", + 1843: "netopia-vo5", + 1844: "direcpc-dll", + 1845: "altalink", + 1846: "tunstall-pnc", + 1847: "slp-notify", + 1848: "fjdocdist", + 1849: "alpha-sms", + 1850: "gsi", + 1851: "ctcd", + 1852: "virtual-time", + 1853: "vids-avtp", + 1854: "buddy-draw", + 1855: "fiorano-rtrsvc", + 1856: "fiorano-msgsvc", + 1857: "datacaptor", + 1858: "privateark", + 1859: "gammafetchsvr", + 1860: "sunscalar-svc", + 1861: "lecroy-vicp", + 1862: "mysql-cm-agent", + 1863: "msnp", + 1864: "paradym-31port", + 1865: "entp", + 1866: "swrmi", + 1867: "udrive", + 1868: "viziblebrowser", + 1869: "transact", + 1870: "sunscalar-dns", + 1871: "canocentral0", + 1872: "canocentral1", + 1873: "fjmpjps", + 1874: "fjswapsnp", + 1875: "westell-stats", + 1876: "ewcappsrv", + 1877: "hp-webqosdb", + 1878: "drmsmc", + 1879: "nettgain-nms", + 1880: "vsat-control", + 1881: "ibm-mqseries2", + 1882: "ecsqdmn", + 1883: "mqtt", + 1884: "idmaps", + 1885: "vrtstrapserver", + 1886: "leoip", + 1887: "filex-lport", + 1888: "ncconfig", + 1889: "unify-adapter", + 1890: "wilkenlistener", + 1891: "childkey-notif", + 1892: "childkey-ctrl", + 1893: "elad", + 1894: "o2server-port", + 1896: "b-novative-ls", + 1897: "metaagent", + 1898: "cymtec-port", + 1899: "mc2studios", + 1900: "ssdp", + 1901: "fjicl-tep-a", + 1902: "fjicl-tep-b", + 1903: "linkname", + 1904: "fjicl-tep-c", + 1905: "sugp", + 1906: "tpmd", + 1907: "intrastar", + 1908: "dawn", + 1909: "global-wlink", + 1910: "ultrabac", + 1911: "mtp", + 1912: "rhp-iibp", + 1913: "armadp", + 1914: "elm-momentum", + 1915: "facelink", + 1916: "persona", + 1917: "noagent", + 1918: "can-nds", + 1919: "can-dch", + 1920: "can-ferret", + 1921: "noadmin", + 1922: "tapestry", + 1923: "spice", + 1924: "xiip", + 1925: "discovery-port", + 1926: "egs", + 1927: "videte-cipc", + 1928: "emsd-port", + 1929: "bandwiz-system", + 1930: "driveappserver", + 1931: "amdsched", + 1932: "ctt-broker", + 1933: "xmapi", + 1934: "xaapi", + 1935: "macromedia-fcs", + 1936: "jetcmeserver", + 1937: "jwserver", + 1938: "jwclient", + 1939: "jvserver", + 1940: "jvclient", + 1941: "dic-aida", + 1942: "res", + 1943: "beeyond-media", + 1944: "close-combat", + 1945: "dialogic-elmd", + 1946: "tekpls", + 1947: "sentinelsrm", + 1948: "eye2eye", + 1949: "ismaeasdaqlive", + 1950: "ismaeasdaqtest", + 1951: "bcs-lmserver", + 1952: "mpnjsc", + 1953: "rapidbase", + 1954: "abr-api", + 1955: "abr-secure", + 1956: "vrtl-vmf-ds", + 1957: "unix-status", + 1958: "dxadmind", + 1959: "simp-all", + 1960: "nasmanager", + 1961: "bts-appserver", + 1962: "biap-mp", + 1963: "webmachine", + 1964: "solid-e-engine", + 1965: "tivoli-npm", + 1966: "slush", + 1967: "sns-quote", + 1968: "lipsinc", + 1969: "lipsinc1", + 1970: "netop-rc", + 1971: "netop-school", + 1972: "intersys-cache", + 1973: "dlsrap", + 1974: "drp", + 1975: "tcoflashagent", + 1976: "tcoregagent", + 1977: "tcoaddressbook", + 1978: "unisql", + 1979: "unisql-java", + 1980: "pearldoc-xact", + 1981: "p2pq", + 1982: "estamp", + 1983: "lhtp", + 1984: "bb", + 1985: "hsrp", + 1986: "licensedaemon", + 1987: "tr-rsrb-p1", + 1988: "tr-rsrb-p2", + 1989: "tr-rsrb-p3", + 1990: "stun-p1", + 1991: "stun-p2", + 1992: "stun-p3", + 1993: "snmp-tcp-port", + 1994: "stun-port", + 1995: "perf-port", + 1996: "tr-rsrb-port", + 1997: "gdp-port", + 1998: "x25-svc-port", + 1999: "tcp-id-port", + 2000: "cisco-sccp", + 2001: "wizard", + 2002: "globe", + 2003: "brutus", + 2004: "emce", + 2005: "oracle", + 2006: "raid-cd", + 2007: "raid-am", + 2008: "terminaldb", + 2009: "whosockami", + 2010: "pipe-server", + 2011: "servserv", + 2012: "raid-ac", + 2013: "raid-cd", + 2014: "raid-sf", + 2015: "raid-cs", + 2016: "bootserver", + 2017: "bootclient", + 2018: "rellpack", + 2019: "about", + 2020: "xinupageserver", + 2021: "xinuexpansion1", + 2022: "xinuexpansion2", + 2023: "xinuexpansion3", + 2024: "xinuexpansion4", + 2025: "xribs", + 2026: "scrabble", + 2027: "shadowserver", + 2028: "submitserver", + 2029: "hsrpv6", + 2030: "device2", + 2031: "mobrien-chat", + 2032: "blackboard", + 2033: "glogger", + 2034: "scoremgr", + 2035: "imsldoc", + 2036: "e-dpnet", + 2037: "applus", + 2038: "objectmanager", + 2039: "prizma", + 2040: "lam", + 2041: "interbase", + 2042: "isis", + 2043: "isis-bcast", + 2044: "rimsl", + 2045: "cdfunc", + 2046: "sdfunc", + 2047: "dls", + 2048: "dls-monitor", + 2049: "shilp", + 2050: "av-emb-config", + 2051: "epnsdp", + 2052: "clearvisn", + 2053: "lot105-ds-upd", + 2054: "weblogin", + 2055: "iop", + 2056: "omnisky", + 2057: "rich-cp", + 2058: "newwavesearch", + 2059: "bmc-messaging", + 2060: "teleniumdaemon", + 2061: "netmount", + 2062: "icg-swp", + 2063: "icg-bridge", + 2064: "icg-iprelay", + 2065: "dlsrpn", + 2066: "aura", + 2067: "dlswpn", + 2068: "avauthsrvprtcl", + 2069: "event-port", + 2070: "ah-esp-encap", + 2071: "acp-port", + 2072: "msync", + 2073: "gxs-data-port", + 2074: "vrtl-vmf-sa", + 2075: "newlixengine", + 2076: "newlixconfig", + 2077: "tsrmagt", + 2078: "tpcsrvr", + 2079: "idware-router", + 2080: "autodesk-nlm", + 2081: "kme-trap-port", + 2082: "infowave", + 2083: "radsec", + 2084: "sunclustergeo", + 2085: "ada-cip", + 2086: "gnunet", + 2087: "eli", + 2088: "ip-blf", + 2089: "sep", + 2090: "lrp", + 2091: "prp", + 2092: "descent3", + 2093: "nbx-cc", + 2094: "nbx-au", + 2095: "nbx-ser", + 2096: "nbx-dir", + 2097: "jetformpreview", + 2098: "dialog-port", + 2099: "h2250-annex-g", + 2100: "amiganetfs", + 2101: "rtcm-sc104", + 2102: "zephyr-srv", + 2103: "zephyr-clt", + 2104: "zephyr-hm", + 2105: "minipay", + 2106: "mzap", + 2107: "bintec-admin", + 2108: "comcam", + 2109: "ergolight", + 2110: "umsp", + 2111: "dsatp", + 2112: "idonix-metanet", + 2113: "hsl-storm", + 2114: "newheights", + 2115: "kdm", + 2116: "ccowcmr", + 2117: "mentaclient", + 2118: "mentaserver", + 2119: "gsigatekeeper", + 2120: "qencp", + 2121: "scientia-ssdb", + 2122: "caupc-remote", + 2123: "gtp-control", + 2124: "elatelink", + 2125: "lockstep", + 2126: "pktcable-cops", + 2127: "index-pc-wb", + 2128: "net-steward", + 2129: "cs-live", + 2130: "xds", + 2131: "avantageb2b", + 2132: "solera-epmap", + 2133: "zymed-zpp", + 2134: "avenue", + 2135: "gris", + 2136: "appworxsrv", + 2137: "connect", + 2138: "unbind-cluster", + 2139: "ias-auth", + 2140: "ias-reg", + 2141: "ias-admind", + 2142: "tdmoip", + 2143: "lv-jc", + 2144: "lv-ffx", + 2145: "lv-pici", + 2146: "lv-not", + 2147: "lv-auth", + 2148: "veritas-ucl", + 2149: "acptsys", + 2150: "dynamic3d", + 2151: "docent", + 2152: "gtp-user", + 2153: "ctlptc", + 2154: "stdptc", + 2155: "brdptc", + 2156: "trp", + 2157: "xnds", + 2158: "touchnetplus", + 2159: "gdbremote", + 2160: "apc-2160", + 2161: "apc-2161", + 2162: "navisphere", + 2163: "navisphere-sec", + 2164: "ddns-v3", + 2165: "x-bone-api", + 2166: "iwserver", + 2167: "raw-serial", + 2168: "easy-soft-mux", + 2169: "brain", + 2170: "eyetv", + 2171: "msfw-storage", + 2172: "msfw-s-storage", + 2173: "msfw-replica", + 2174: "msfw-array", + 2175: "airsync", + 2176: "rapi", + 2177: "qwave", + 2178: "bitspeer", + 2179: "vmrdp", + 2180: "mc-gt-srv", + 2181: "eforward", + 2182: "cgn-stat", + 2183: "cgn-config", + 2184: "nvd", + 2185: "onbase-dds", + 2186: "gtaua", + 2187: "ssmd", + 2190: "tivoconnect", + 2191: "tvbus", + 2192: "asdis", + 2193: "drwcs", + 2197: "mnp-exchange", + 2198: "onehome-remote", + 2199: "onehome-help", + 2200: "ici", + 2201: "ats", + 2202: "imtc-map", + 2203: "b2-runtime", + 2204: "b2-license", + 2205: "jps", + 2206: "hpocbus", + 2207: "hpssd", + 2208: "hpiod", + 2209: "rimf-ps", + 2210: "noaaport", + 2211: "emwin", + 2212: "leecoposserver", + 2213: "kali", + 2214: "rpi", + 2215: "ipcore", + 2216: "vtu-comms", + 2217: "gotodevice", + 2218: "bounzza", + 2219: "netiq-ncap", + 2220: "netiq", + 2221: "ethernet-ip-s", + 2222: "EtherNet-IP-1", + 2223: "rockwell-csp2", + 2224: "efi-mg", + 2226: "di-drm", + 2227: "di-msg", + 2228: "ehome-ms", + 2229: "datalens", + 2230: "queueadm", + 2231: "wimaxasncp", + 2232: "ivs-video", + 2233: "infocrypt", + 2234: "directplay", + 2235: "sercomm-wlink", + 2236: "nani", + 2237: "optech-port1-lm", + 2238: "aviva-sna", + 2239: "imagequery", + 2240: "recipe", + 2241: "ivsd", + 2242: "foliocorp", + 2243: "magicom", + 2244: "nmsserver", + 2245: "hao", + 2246: "pc-mta-addrmap", + 2247: "antidotemgrsvr", + 2248: "ums", + 2249: "rfmp", + 2250: "remote-collab", + 2251: "dif-port", + 2252: "njenet-ssl", + 2253: "dtv-chan-req", + 2254: "seispoc", + 2255: "vrtp", + 2256: "pcc-mfp", + 2257: "simple-tx-rx", + 2258: "rcts", + 2260: "apc-2260", + 2261: "comotionmaster", + 2262: "comotionback", + 2263: "ecwcfg", + 2264: "apx500api-1", + 2265: "apx500api-2", + 2266: "mfserver", + 2267: "ontobroker", + 2268: "amt", + 2269: "mikey", + 2270: "starschool", + 2271: "mmcals", + 2272: "mmcal", + 2273: "mysql-im", + 2274: "pcttunnell", + 2275: "ibridge-data", + 2276: "ibridge-mgmt", + 2277: "bluectrlproxy", + 2278: "s3db", + 2279: "xmquery", + 2280: "lnvpoller", + 2281: "lnvconsole", + 2282: "lnvalarm", + 2283: "lnvstatus", + 2284: "lnvmaps", + 2285: "lnvmailmon", + 2286: "nas-metering", + 2287: "dna", + 2288: "netml", + 2289: "dict-lookup", + 2290: "sonus-logging", + 2291: "eapsp", + 2292: "mib-streaming", + 2293: "npdbgmngr", + 2294: "konshus-lm", + 2295: "advant-lm", + 2296: "theta-lm", + 2297: "d2k-datamover1", + 2298: "d2k-datamover2", + 2299: "pc-telecommute", + 2300: "cvmmon", + 2301: "cpq-wbem", + 2302: "binderysupport", + 2303: "proxy-gateway", + 2304: "attachmate-uts", + 2305: "mt-scaleserver", + 2306: "tappi-boxnet", + 2307: "pehelp", + 2308: "sdhelp", + 2309: "sdserver", + 2310: "sdclient", + 2311: "messageservice", + 2312: "wanscaler", + 2313: "iapp", + 2314: "cr-websystems", + 2315: "precise-sft", + 2316: "sent-lm", + 2317: "attachmate-g32", + 2318: "cadencecontrol", + 2319: "infolibria", + 2320: "siebel-ns", + 2321: "rdlap", + 2322: "ofsd", + 2323: "3d-nfsd", + 2324: "cosmocall", + 2325: "ansysli", + 2326: "idcp", + 2327: "xingcsm", + 2328: "netrix-sftm", + 2329: "nvd", + 2330: "tscchat", + 2331: "agentview", + 2332: "rcc-host", + 2333: "snapp", + 2334: "ace-client", + 2335: "ace-proxy", + 2336: "appleugcontrol", + 2337: "ideesrv", + 2338: "norton-lambert", + 2339: "3com-webview", + 2340: "wrs-registry", + 2341: "xiostatus", + 2342: "manage-exec", + 2343: "nati-logos", + 2344: "fcmsys", + 2345: "dbm", + 2346: "redstorm-join", + 2347: "redstorm-find", + 2348: "redstorm-info", + 2349: "redstorm-diag", + 2350: "psbserver", + 2351: "psrserver", + 2352: "pslserver", + 2353: "pspserver", + 2354: "psprserver", + 2355: "psdbserver", + 2356: "gxtelmd", + 2357: "unihub-server", + 2358: "futrix", + 2359: "flukeserver", + 2360: "nexstorindltd", + 2361: "tl1", + 2362: "digiman", + 2363: "mediacntrlnfsd", + 2364: "oi-2000", + 2365: "dbref", + 2366: "qip-login", + 2367: "service-ctrl", + 2368: "opentable", + 2370: "l3-hbmon", + 2372: "lanmessenger", + 2381: "compaq-https", + 2382: "ms-olap3", + 2383: "ms-olap4", + 2384: "sd-capacity", + 2385: "sd-data", + 2386: "virtualtape", + 2387: "vsamredirector", + 2388: "mynahautostart", + 2389: "ovsessionmgr", + 2390: "rsmtp", + 2391: "3com-net-mgmt", + 2392: "tacticalauth", + 2393: "ms-olap1", + 2394: "ms-olap2", + 2395: "lan900-remote", + 2396: "wusage", + 2397: "ncl", + 2398: "orbiter", + 2399: "fmpro-fdal", + 2400: "opequus-server", + 2401: "cvspserver", + 2402: "taskmaster2000", + 2403: "taskmaster2000", + 2404: "iec-104", + 2405: "trc-netpoll", + 2406: "jediserver", + 2407: "orion", + 2409: "sns-protocol", + 2410: "vrts-registry", + 2411: "netwave-ap-mgmt", + 2412: "cdn", + 2413: "orion-rmi-reg", + 2414: "beeyond", + 2415: "codima-rtp", + 2416: "rmtserver", + 2417: "composit-server", + 2418: "cas", + 2419: "attachmate-s2s", + 2420: "dslremote-mgmt", + 2421: "g-talk", + 2422: "crmsbits", + 2423: "rnrp", + 2424: "kofax-svr", + 2425: "fjitsuappmgr", + 2426: "vcmp", + 2427: "mgcp-gateway", + 2428: "ott", + 2429: "ft-role", + 2430: "venus", + 2431: "venus-se", + 2432: "codasrv", + 2433: "codasrv-se", + 2434: "pxc-epmap", + 2435: "optilogic", + 2436: "topx", + 2437: "unicontrol", + 2438: "msp", + 2439: "sybasedbsynch", + 2440: "spearway", + 2441: "pvsw-inet", + 2442: "netangel", + 2443: "powerclientcsf", + 2444: "btpp2sectrans", + 2445: "dtn1", + 2446: "bues-service", + 2447: "ovwdb", + 2448: "hpppssvr", + 2449: "ratl", + 2450: "netadmin", + 2451: "netchat", + 2452: "snifferclient", + 2453: "madge-ltd", + 2454: "indx-dds", + 2455: "wago-io-system", + 2456: "altav-remmgt", + 2457: "rapido-ip", + 2458: "griffin", + 2459: "community", + 2460: "ms-theater", + 2461: "qadmifoper", + 2462: "qadmifevent", + 2463: "lsi-raid-mgmt", + 2464: "direcpc-si", + 2465: "lbm", + 2466: "lbf", + 2467: "high-criteria", + 2468: "qip-msgd", + 2469: "mti-tcs-comm", + 2470: "taskman-port", + 2471: "seaodbc", + 2472: "c3", + 2473: "aker-cdp", + 2474: "vitalanalysis", + 2475: "ace-server", + 2476: "ace-svr-prop", + 2477: "ssm-cvs", + 2478: "ssm-cssps", + 2479: "ssm-els", + 2480: "powerexchange", + 2481: "giop", + 2482: "giop-ssl", + 2483: "ttc", + 2484: "ttc-ssl", + 2485: "netobjects1", + 2486: "netobjects2", + 2487: "pns", + 2488: "moy-corp", + 2489: "tsilb", + 2490: "qip-qdhcp", + 2491: "conclave-cpp", + 2492: "groove", + 2493: "talarian-mqs", + 2494: "bmc-ar", + 2495: "fast-rem-serv", + 2496: "dirgis", + 2497: "quaddb", + 2498: "odn-castraq", + 2499: "unicontrol", + 2500: "rtsserv", + 2501: "rtsclient", + 2502: "kentrox-prot", + 2503: "nms-dpnss", + 2504: "wlbs", + 2505: "ppcontrol", + 2506: "jbroker", + 2507: "spock", + 2508: "jdatastore", + 2509: "fjmpss", + 2510: "fjappmgrbulk", + 2511: "metastorm", + 2512: "citrixima", + 2513: "citrixadmin", + 2514: "facsys-ntp", + 2515: "facsys-router", + 2516: "maincontrol", + 2517: "call-sig-trans", + 2518: "willy", + 2519: "globmsgsvc", + 2520: "pvsw", + 2521: "adaptecmgr", + 2522: "windb", + 2523: "qke-llc-v3", + 2524: "optiwave-lm", + 2525: "ms-v-worlds", + 2526: "ema-sent-lm", + 2527: "iqserver", + 2528: "ncr-ccl", + 2529: "utsftp", + 2530: "vrcommerce", + 2531: "ito-e-gui", + 2532: "ovtopmd", + 2533: "snifferserver", + 2534: "combox-web-acc", + 2535: "madcap", + 2536: "btpp2audctr1", + 2537: "upgrade", + 2538: "vnwk-prapi", + 2539: "vsiadmin", + 2540: "lonworks", + 2541: "lonworks2", + 2542: "udrawgraph", + 2543: "reftek", + 2544: "novell-zen", + 2545: "sis-emt", + 2546: "vytalvaultbrtp", + 2547: "vytalvaultvsmp", + 2548: "vytalvaultpipe", + 2549: "ipass", + 2550: "ads", + 2551: "isg-uda-server", + 2552: "call-logging", + 2553: "efidiningport", + 2554: "vcnet-link-v10", + 2555: "compaq-wcp", + 2556: "nicetec-nmsvc", + 2557: "nicetec-mgmt", + 2558: "pclemultimedia", + 2559: "lstp", + 2560: "labrat", + 2561: "mosaixcc", + 2562: "delibo", + 2563: "cti-redwood", + 2564: "hp-3000-telnet", + 2565: "coord-svr", + 2566: "pcs-pcw", + 2567: "clp", + 2568: "spamtrap", + 2569: "sonuscallsig", + 2570: "hs-port", + 2571: "cecsvc", + 2572: "ibp", + 2573: "trustestablish", + 2574: "blockade-bpsp", + 2575: "hl7", + 2576: "tclprodebugger", + 2577: "scipticslsrvr", + 2578: "rvs-isdn-dcp", + 2579: "mpfoncl", + 2580: "tributary", + 2581: "argis-te", + 2582: "argis-ds", + 2583: "mon", + 2584: "cyaserv", + 2585: "netx-server", + 2586: "netx-agent", + 2587: "masc", + 2588: "privilege", + 2589: "quartus-tcl", + 2590: "idotdist", + 2591: "maytagshuffle", + 2592: "netrek", + 2593: "mns-mail", + 2594: "dts", + 2595: "worldfusion1", + 2596: "worldfusion2", + 2597: "homesteadglory", + 2598: "citriximaclient", + 2599: "snapd", + 2600: "hpstgmgr", + 2601: "discp-client", + 2602: "discp-server", + 2603: "servicemeter", + 2604: "nsc-ccs", + 2605: "nsc-posa", + 2606: "netmon", + 2607: "connection", + 2608: "wag-service", + 2609: "system-monitor", + 2610: "versa-tek", + 2611: "lionhead", + 2612: "qpasa-agent", + 2613: "smntubootstrap", + 2614: "neveroffline", + 2615: "firepower", + 2616: "appswitch-emp", + 2617: "cmadmin", + 2618: "priority-e-com", + 2619: "bruce", + 2620: "lpsrecommender", + 2621: "miles-apart", + 2622: "metricadbc", + 2623: "lmdp", + 2624: "aria", + 2625: "blwnkl-port", + 2626: "gbjd816", + 2627: "moshebeeri", + 2628: "dict", + 2629: "sitaraserver", + 2630: "sitaramgmt", + 2631: "sitaradir", + 2632: "irdg-post", + 2633: "interintelli", + 2634: "pk-electronics", + 2635: "backburner", + 2636: "solve", + 2637: "imdocsvc", + 2638: "sybaseanywhere", + 2639: "aminet", + 2640: "ami-control", + 2641: "hdl-srv", + 2642: "tragic", + 2643: "gte-samp", + 2644: "travsoft-ipx-t", + 2645: "novell-ipx-cmd", + 2646: "and-lm", + 2647: "syncserver", + 2648: "upsnotifyprot", + 2649: "vpsipport", + 2650: "eristwoguns", + 2651: "ebinsite", + 2652: "interpathpanel", + 2653: "sonus", + 2654: "corel-vncadmin", + 2655: "unglue", + 2656: "kana", + 2657: "sns-dispatcher", + 2658: "sns-admin", + 2659: "sns-query", + 2660: "gcmonitor", + 2661: "olhost", + 2662: "bintec-capi", + 2663: "bintec-tapi", + 2664: "patrol-mq-gm", + 2665: "patrol-mq-nm", + 2666: "extensis", + 2667: "alarm-clock-s", + 2668: "alarm-clock-c", + 2669: "toad", + 2670: "tve-announce", + 2671: "newlixreg", + 2672: "nhserver", + 2673: "firstcall42", + 2674: "ewnn", + 2675: "ttc-etap", + 2676: "simslink", + 2677: "gadgetgate1way", + 2678: "gadgetgate2way", + 2679: "syncserverssl", + 2680: "pxc-sapxom", + 2681: "mpnjsomb", + 2683: "ncdloadbalance", + 2684: "mpnjsosv", + 2685: "mpnjsocl", + 2686: "mpnjsomg", + 2687: "pq-lic-mgmt", + 2688: "md-cg-http", + 2689: "fastlynx", + 2690: "hp-nnm-data", + 2691: "itinternet", + 2692: "admins-lms", + 2694: "pwrsevent", + 2695: "vspread", + 2696: "unifyadmin", + 2697: "oce-snmp-trap", + 2698: "mck-ivpip", + 2699: "csoft-plusclnt", + 2700: "tqdata", + 2701: "sms-rcinfo", + 2702: "sms-xfer", + 2703: "sms-chat", + 2704: "sms-remctrl", + 2705: "sds-admin", + 2706: "ncdmirroring", + 2707: "emcsymapiport", + 2708: "banyan-net", + 2709: "supermon", + 2710: "sso-service", + 2711: "sso-control", + 2712: "aocp", + 2713: "raventbs", + 2714: "raventdm", + 2715: "hpstgmgr2", + 2716: "inova-ip-disco", + 2717: "pn-requester", + 2718: "pn-requester2", + 2719: "scan-change", + 2720: "wkars", + 2721: "smart-diagnose", + 2722: "proactivesrvr", + 2723: "watchdog-nt", + 2724: "qotps", + 2725: "msolap-ptp2", + 2726: "tams", + 2727: "mgcp-callagent", + 2728: "sqdr", + 2729: "tcim-control", + 2730: "nec-raidplus", + 2731: "fyre-messanger", + 2732: "g5m", + 2733: "signet-ctf", + 2734: "ccs-software", + 2735: "netiq-mc", + 2736: "radwiz-nms-srv", + 2737: "srp-feedback", + 2738: "ndl-tcp-ois-gw", + 2739: "tn-timing", + 2740: "alarm", + 2741: "tsb", + 2742: "tsb2", + 2743: "murx", + 2744: "honyaku", + 2745: "urbisnet", + 2746: "cpudpencap", + 2747: "fjippol-swrly", + 2748: "fjippol-polsvr", + 2749: "fjippol-cnsl", + 2750: "fjippol-port1", + 2751: "fjippol-port2", + 2752: "rsisysaccess", + 2753: "de-spot", + 2754: "apollo-cc", + 2755: "expresspay", + 2756: "simplement-tie", + 2757: "cnrp", + 2758: "apollo-status", + 2759: "apollo-gms", + 2760: "sabams", + 2761: "dicom-iscl", + 2762: "dicom-tls", + 2763: "desktop-dna", + 2764: "data-insurance", + 2765: "qip-audup", + 2766: "compaq-scp", + 2767: "uadtc", + 2768: "uacs", + 2769: "exce", + 2770: "veronica", + 2771: "vergencecm", + 2772: "auris", + 2773: "rbakcup1", + 2774: "rbakcup2", + 2775: "smpp", + 2776: "ridgeway1", + 2777: "ridgeway2", + 2778: "gwen-sonya", + 2779: "lbc-sync", + 2780: "lbc-control", + 2781: "whosells", + 2782: "everydayrc", + 2783: "aises", + 2784: "www-dev", + 2785: "aic-np", + 2786: "aic-oncrpc", + 2787: "piccolo", + 2788: "fryeserv", + 2789: "media-agent", + 2790: "plgproxy", + 2791: "mtport-regist", + 2792: "f5-globalsite", + 2793: "initlsmsad", + 2795: "livestats", + 2796: "ac-tech", + 2797: "esp-encap", + 2798: "tmesis-upshot", + 2799: "icon-discover", + 2800: "acc-raid", + 2801: "igcp", + 2802: "veritas-udp1", + 2803: "btprjctrl", + 2804: "dvr-esm", + 2805: "wta-wsp-s", + 2806: "cspuni", + 2807: "cspmulti", + 2808: "j-lan-p", + 2809: "corbaloc", + 2810: "netsteward", + 2811: "gsiftp", + 2812: "atmtcp", + 2813: "llm-pass", + 2814: "llm-csv", + 2815: "lbc-measure", + 2816: "lbc-watchdog", + 2817: "nmsigport", + 2818: "rmlnk", + 2819: "fc-faultnotify", + 2820: "univision", + 2821: "vrts-at-port", + 2822: "ka0wuc", + 2823: "cqg-netlan", + 2824: "cqg-netlan-1", + 2826: "slc-systemlog", + 2827: "slc-ctrlrloops", + 2828: "itm-lm", + 2829: "silkp1", + 2830: "silkp2", + 2831: "silkp3", + 2832: "silkp4", + 2833: "glishd", + 2834: "evtp", + 2835: "evtp-data", + 2836: "catalyst", + 2837: "repliweb", + 2838: "starbot", + 2839: "nmsigport", + 2840: "l3-exprt", + 2841: "l3-ranger", + 2842: "l3-hawk", + 2843: "pdnet", + 2844: "bpcp-poll", + 2845: "bpcp-trap", + 2846: "aimpp-hello", + 2847: "aimpp-port-req", + 2848: "amt-blc-port", + 2849: "fxp", + 2850: "metaconsole", + 2851: "webemshttp", + 2852: "bears-01", + 2853: "ispipes", + 2854: "infomover", + 2856: "cesdinv", + 2857: "simctlp", + 2858: "ecnp", + 2859: "activememory", + 2860: "dialpad-voice1", + 2861: "dialpad-voice2", + 2862: "ttg-protocol", + 2863: "sonardata", + 2864: "astromed-main", + 2865: "pit-vpn", + 2866: "iwlistener", + 2867: "esps-portal", + 2868: "npep-messaging", + 2869: "icslap", + 2870: "daishi", + 2871: "msi-selectplay", + 2872: "radix", + 2874: "dxmessagebase1", + 2875: "dxmessagebase2", + 2876: "sps-tunnel", + 2877: "bluelance", + 2878: "aap", + 2879: "ucentric-ds", + 2880: "synapse", + 2881: "ndsp", + 2882: "ndtp", + 2883: "ndnp", + 2884: "flashmsg", + 2885: "topflow", + 2886: "responselogic", + 2887: "aironetddp", + 2888: "spcsdlobby", + 2889: "rsom", + 2890: "cspclmulti", + 2891: "cinegrfx-elmd", + 2892: "snifferdata", + 2893: "vseconnector", + 2894: "abacus-remote", + 2895: "natuslink", + 2896: "ecovisiong6-1", + 2897: "citrix-rtmp", + 2898: "appliance-cfg", + 2899: "powergemplus", + 2900: "quicksuite", + 2901: "allstorcns", + 2902: "netaspi", + 2903: "suitcase", + 2904: "m2ua", + 2906: "caller9", + 2907: "webmethods-b2b", + 2908: "mao", + 2909: "funk-dialout", + 2910: "tdaccess", + 2911: "blockade", + 2912: "epicon", + 2913: "boosterware", + 2914: "gamelobby", + 2915: "tksocket", + 2916: "elvin-server", + 2917: "elvin-client", + 2918: "kastenchasepad", + 2919: "roboer", + 2920: "roboeda", + 2921: "cesdcdman", + 2922: "cesdcdtrn", + 2923: "wta-wsp-wtp-s", + 2924: "precise-vip", + 2926: "mobile-file-dl", + 2927: "unimobilectrl", + 2928: "redstone-cpss", + 2929: "amx-webadmin", + 2930: "amx-weblinx", + 2931: "circle-x", + 2932: "incp", + 2933: "4-tieropmgw", + 2934: "4-tieropmcli", + 2935: "qtp", + 2936: "otpatch", + 2937: "pnaconsult-lm", + 2938: "sm-pas-1", + 2939: "sm-pas-2", + 2940: "sm-pas-3", + 2941: "sm-pas-4", + 2942: "sm-pas-5", + 2943: "ttnrepository", + 2944: "megaco-h248", + 2945: "h248-binary", + 2946: "fjsvmpor", + 2947: "gpsd", + 2948: "wap-push", + 2949: "wap-pushsecure", + 2950: "esip", + 2951: "ottp", + 2952: "mpfwsas", + 2953: "ovalarmsrv", + 2954: "ovalarmsrv-cmd", + 2955: "csnotify", + 2956: "ovrimosdbman", + 2957: "jmact5", + 2958: "jmact6", + 2959: "rmopagt", + 2960: "dfoxserver", + 2961: "boldsoft-lm", + 2962: "iph-policy-cli", + 2963: "iph-policy-adm", + 2964: "bullant-srap", + 2965: "bullant-rap", + 2966: "idp-infotrieve", + 2967: "ssc-agent", + 2968: "enpp", + 2969: "essp", + 2970: "index-net", + 2971: "netclip", + 2972: "pmsm-webrctl", + 2973: "svnetworks", + 2974: "signal", + 2975: "fjmpcm", + 2976: "cns-srv-port", + 2977: "ttc-etap-ns", + 2978: "ttc-etap-ds", + 2979: "h263-video", + 2980: "wimd", + 2981: "mylxamport", + 2982: "iwb-whiteboard", + 2983: "netplan", + 2984: "hpidsadmin", + 2985: "hpidsagent", + 2986: "stonefalls", + 2987: "identify", + 2988: "hippad", + 2989: "zarkov", + 2990: "boscap", + 2991: "wkstn-mon", + 2992: "avenyo", + 2993: "veritas-vis1", + 2994: "veritas-vis2", + 2995: "idrs", + 2996: "vsixml", + 2997: "rebol", + 2998: "realsecure", + 2999: "remoteware-un", + 3000: "hbci", + 3002: "exlm-agent", + 3003: "cgms", + 3004: "csoftragent", + 3005: "geniuslm", + 3006: "ii-admin", + 3007: "lotusmtap", + 3008: "midnight-tech", + 3009: "pxc-ntfy", + 3010: "ping-pong", + 3011: "trusted-web", + 3012: "twsdss", + 3013: "gilatskysurfer", + 3014: "broker-service", + 3015: "nati-dstp", + 3016: "notify-srvr", + 3017: "event-listener", + 3018: "srvc-registry", + 3019: "resource-mgr", + 3020: "cifs", + 3021: "agriserver", + 3022: "csregagent", + 3023: "magicnotes", + 3024: "nds-sso", + 3025: "arepa-raft", + 3026: "agri-gateway", + 3027: "LiebDevMgmt-C", + 3028: "LiebDevMgmt-DM", + 3029: "LiebDevMgmt-A", + 3030: "arepa-cas", + 3031: "eppc", + 3032: "redwood-chat", + 3033: "pdb", + 3034: "osmosis-aeea", + 3035: "fjsv-gssagt", + 3036: "hagel-dump", + 3037: "hp-san-mgmt", + 3038: "santak-ups", + 3039: "cogitate", + 3040: "tomato-springs", + 3041: "di-traceware", + 3042: "journee", + 3043: "brp", + 3044: "epp", + 3045: "responsenet", + 3046: "di-ase", + 3047: "hlserver", + 3048: "pctrader", + 3049: "nsws", + 3050: "gds-db", + 3051: "galaxy-server", + 3052: "apc-3052", + 3053: "dsom-server", + 3054: "amt-cnf-prot", + 3055: "policyserver", + 3056: "cdl-server", + 3057: "goahead-fldup", + 3058: "videobeans", + 3059: "qsoft", + 3060: "interserver", + 3061: "cautcpd", + 3062: "ncacn-ip-tcp", + 3063: "ncadg-ip-udp", + 3064: "rprt", + 3065: "slinterbase", + 3066: "netattachsdmp", + 3067: "fjhpjp", + 3068: "ls3bcast", + 3069: "ls3", + 3070: "mgxswitch", + 3072: "csd-monitor", + 3073: "vcrp", + 3074: "xbox", + 3075: "orbix-locator", + 3076: "orbix-config", + 3077: "orbix-loc-ssl", + 3078: "orbix-cfg-ssl", + 3079: "lv-frontpanel", + 3080: "stm-pproc", + 3081: "tl1-lv", + 3082: "tl1-raw", + 3083: "tl1-telnet", + 3084: "itm-mccs", + 3085: "pcihreq", + 3086: "jdl-dbkitchen", + 3087: "asoki-sma", + 3088: "xdtp", + 3089: "ptk-alink", + 3090: "stss", + 3091: "1ci-smcs", + 3093: "rapidmq-center", + 3094: "rapidmq-reg", + 3095: "panasas", + 3096: "ndl-aps", + 3098: "umm-port", + 3099: "chmd", + 3100: "opcon-xps", + 3101: "hp-pxpib", + 3102: "slslavemon", + 3103: "autocuesmi", + 3104: "autocuetime", + 3105: "cardbox", + 3106: "cardbox-http", + 3107: "business", + 3108: "geolocate", + 3109: "personnel", + 3110: "sim-control", + 3111: "wsynch", + 3112: "ksysguard", + 3113: "cs-auth-svr", + 3114: "ccmad", + 3115: "mctet-master", + 3116: "mctet-gateway", + 3117: "mctet-jserv", + 3118: "pkagent", + 3119: "d2000kernel", + 3120: "d2000webserver", + 3122: "vtr-emulator", + 3123: "edix", + 3124: "beacon-port", + 3125: "a13-an", + 3127: "ctx-bridge", + 3128: "ndl-aas", + 3129: "netport-id", + 3130: "icpv2", + 3131: "netbookmark", + 3132: "ms-rule-engine", + 3133: "prism-deploy", + 3134: "ecp", + 3135: "peerbook-port", + 3136: "grubd", + 3137: "rtnt-1", + 3138: "rtnt-2", + 3139: "incognitorv", + 3140: "ariliamulti", + 3141: "vmodem", + 3142: "rdc-wh-eos", + 3143: "seaview", + 3144: "tarantella", + 3145: "csi-lfap", + 3146: "bears-02", + 3147: "rfio", + 3148: "nm-game-admin", + 3149: "nm-game-server", + 3150: "nm-asses-admin", + 3151: "nm-assessor", + 3152: "feitianrockey", + 3153: "s8-client-port", + 3154: "ccmrmi", + 3155: "jpegmpeg", + 3156: "indura", + 3157: "e3consultants", + 3158: "stvp", + 3159: "navegaweb-port", + 3160: "tip-app-server", + 3161: "doc1lm", + 3162: "sflm", + 3163: "res-sap", + 3164: "imprs", + 3165: "newgenpay", + 3166: "sossecollector", + 3167: "nowcontact", + 3168: "poweronnud", + 3169: "serverview-as", + 3170: "serverview-asn", + 3171: "serverview-gf", + 3172: "serverview-rm", + 3173: "serverview-icc", + 3174: "armi-server", + 3175: "t1-e1-over-ip", + 3176: "ars-master", + 3177: "phonex-port", + 3178: "radclientport", + 3179: "h2gf-w-2m", + 3180: "mc-brk-srv", + 3181: "bmcpatrolagent", + 3182: "bmcpatrolrnvu", + 3183: "cops-tls", + 3184: "apogeex-port", + 3185: "smpppd", + 3186: "iiw-port", + 3187: "odi-port", + 3188: "brcm-comm-port", + 3189: "pcle-infex", + 3190: "csvr-proxy", + 3191: "csvr-sslproxy", + 3192: "firemonrcc", + 3193: "spandataport", + 3194: "magbind", + 3195: "ncu-1", + 3196: "ncu-2", + 3197: "embrace-dp-s", + 3198: "embrace-dp-c", + 3199: "dmod-workspace", + 3200: "tick-port", + 3201: "cpq-tasksmart", + 3202: "intraintra", + 3203: "netwatcher-mon", + 3204: "netwatcher-db", + 3205: "isns", + 3206: "ironmail", + 3207: "vx-auth-port", + 3208: "pfu-prcallback", + 3209: "netwkpathengine", + 3210: "flamenco-proxy", + 3211: "avsecuremgmt", + 3212: "surveyinst", + 3213: "neon24x7", + 3214: "jmq-daemon-1", + 3215: "jmq-daemon-2", + 3216: "ferrari-foam", + 3217: "unite", + 3218: "smartpackets", + 3219: "wms-messenger", + 3220: "xnm-ssl", + 3221: "xnm-clear-text", + 3222: "glbp", + 3223: "digivote", + 3224: "aes-discovery", + 3225: "fcip-port", + 3226: "isi-irp", + 3227: "dwnmshttp", + 3228: "dwmsgserver", + 3229: "global-cd-port", + 3230: "sftdst-port", + 3231: "vidigo", + 3232: "mdtp", + 3233: "whisker", + 3234: "alchemy", + 3235: "mdap-port", + 3236: "apparenet-ts", + 3237: "apparenet-tps", + 3238: "apparenet-as", + 3239: "apparenet-ui", + 3240: "triomotion", + 3241: "sysorb", + 3242: "sdp-id-port", + 3243: "timelot", + 3244: "onesaf", + 3245: "vieo-fe", + 3246: "dvt-system", + 3247: "dvt-data", + 3248: "procos-lm", + 3249: "ssp", + 3250: "hicp", + 3251: "sysscanner", + 3252: "dhe", + 3253: "pda-data", + 3254: "pda-sys", + 3255: "semaphore", + 3256: "cpqrpm-agent", + 3257: "cpqrpm-server", + 3258: "ivecon-port", + 3259: "epncdp2", + 3260: "iscsi-target", + 3261: "winshadow", + 3262: "necp", + 3263: "ecolor-imager", + 3264: "ccmail", + 3265: "altav-tunnel", + 3266: "ns-cfg-server", + 3267: "ibm-dial-out", + 3268: "msft-gc", + 3269: "msft-gc-ssl", + 3270: "verismart", + 3271: "csoft-prev", + 3272: "user-manager", + 3273: "sxmp", + 3274: "ordinox-server", + 3275: "samd", + 3276: "maxim-asics", + 3277: "awg-proxy", + 3278: "lkcmserver", + 3279: "admind", + 3280: "vs-server", + 3281: "sysopt", + 3282: "datusorb", + 3283: "Apple Remote Desktop (Net Assistant)", + 3284: "4talk", + 3285: "plato", + 3286: "e-net", + 3287: "directvdata", + 3288: "cops", + 3289: "enpc", + 3290: "caps-lm", + 3291: "sah-lm", + 3292: "cart-o-rama", + 3293: "fg-fps", + 3294: "fg-gip", + 3295: "dyniplookup", + 3296: "rib-slm", + 3297: "cytel-lm", + 3298: "deskview", + 3299: "pdrncs", + 3302: "mcs-fastmail", + 3303: "opsession-clnt", + 3304: "opsession-srvr", + 3305: "odette-ftp", + 3306: "mysql", + 3307: "opsession-prxy", + 3308: "tns-server", + 3309: "tns-adv", + 3310: "dyna-access", + 3311: "mcns-tel-ret", + 3312: "appman-server", + 3313: "uorb", + 3314: "uohost", + 3315: "cdid", + 3316: "aicc-cmi", + 3317: "vsaiport", + 3318: "ssrip", + 3319: "sdt-lmd", + 3320: "officelink2000", + 3321: "vnsstr", + 3326: "sftu", + 3327: "bbars", + 3328: "egptlm", + 3329: "hp-device-disc", + 3330: "mcs-calypsoicf", + 3331: "mcs-messaging", + 3332: "mcs-mailsvr", + 3333: "dec-notes", + 3334: "directv-web", + 3335: "directv-soft", + 3336: "directv-tick", + 3337: "directv-catlg", + 3338: "anet-b", + 3339: "anet-l", + 3340: "anet-m", + 3341: "anet-h", + 3342: "webtie", + 3343: "ms-cluster-net", + 3344: "bnt-manager", + 3345: "influence", + 3346: "trnsprntproxy", + 3347: "phoenix-rpc", + 3348: "pangolin-laser", + 3349: "chevinservices", + 3350: "findviatv", + 3351: "btrieve", + 3352: "ssql", + 3353: "fatpipe", + 3354: "suitjd", + 3355: "ordinox-dbase", + 3356: "upnotifyps", + 3357: "adtech-test", + 3358: "mpsysrmsvr", + 3359: "wg-netforce", + 3360: "kv-server", + 3361: "kv-agent", + 3362: "dj-ilm", + 3363: "nati-vi-server", + 3364: "creativeserver", + 3365: "contentserver", + 3366: "creativepartnr", + 3372: "tip2", + 3373: "lavenir-lm", + 3374: "cluster-disc", + 3375: "vsnm-agent", + 3376: "cdbroker", + 3377: "cogsys-lm", + 3378: "wsicopy", + 3379: "socorfs", + 3380: "sns-channels", + 3381: "geneous", + 3382: "fujitsu-neat", + 3383: "esp-lm", + 3384: "hp-clic", + 3385: "qnxnetman", + 3386: "gprs-sig", + 3387: "backroomnet", + 3388: "cbserver", + 3389: "ms-wbt-server", + 3390: "dsc", + 3391: "savant", + 3392: "efi-lm", + 3393: "d2k-tapestry1", + 3394: "d2k-tapestry2", + 3395: "dyna-lm", + 3396: "printer-agent", + 3397: "cloanto-lm", + 3398: "mercantile", + 3399: "csms", + 3400: "csms2", + 3401: "filecast", + 3402: "fxaengine-net", + 3405: "nokia-ann-ch1", + 3406: "nokia-ann-ch2", + 3407: "ldap-admin", + 3408: "BESApi", + 3409: "networklens", + 3410: "networklenss", + 3411: "biolink-auth", + 3412: "xmlblaster", + 3413: "svnet", + 3414: "wip-port", + 3415: "bcinameservice", + 3416: "commandport", + 3417: "csvr", + 3418: "rnmap", + 3419: "softaudit", + 3420: "ifcp-port", + 3421: "bmap", + 3422: "rusb-sys-port", + 3423: "xtrm", + 3424: "xtrms", + 3425: "agps-port", + 3426: "arkivio", + 3427: "websphere-snmp", + 3428: "twcss", + 3429: "gcsp", + 3430: "ssdispatch", + 3431: "ndl-als", + 3432: "osdcp", + 3433: "opnet-smp", + 3434: "opencm", + 3435: "pacom", + 3436: "gc-config", + 3437: "autocueds", + 3438: "spiral-admin", + 3439: "hri-port", + 3440: "ans-console", + 3441: "connect-client", + 3442: "connect-server", + 3443: "ov-nnm-websrv", + 3444: "denali-server", + 3445: "monp", + 3446: "3comfaxrpc", + 3447: "directnet", + 3448: "dnc-port", + 3449: "hotu-chat", + 3450: "castorproxy", + 3451: "asam", + 3452: "sabp-signal", + 3453: "pscupd", + 3454: "mira", + 3455: "prsvp", + 3456: "vat", + 3457: "vat-control", + 3458: "d3winosfi", + 3459: "integral", + 3460: "edm-manager", + 3461: "edm-stager", + 3462: "edm-std-notify", + 3463: "edm-adm-notify", + 3464: "edm-mgr-sync", + 3465: "edm-mgr-cntrl", + 3466: "workflow", + 3467: "rcst", + 3468: "ttcmremotectrl", + 3469: "pluribus", + 3470: "jt400", + 3471: "jt400-ssl", + 3472: "jaugsremotec-1", + 3473: "jaugsremotec-2", + 3474: "ttntspauto", + 3475: "genisar-port", + 3476: "nppmp", + 3477: "ecomm", + 3478: "stun", + 3479: "twrpc", + 3480: "plethora", + 3481: "cleanerliverc", + 3482: "vulture", + 3483: "slim-devices", + 3484: "gbs-stp", + 3485: "celatalk", + 3486: "ifsf-hb-port", + 3487: "ltcudp", + 3488: "fs-rh-srv", + 3489: "dtp-dia", + 3490: "colubris", + 3491: "swr-port", + 3492: "tvdumtray-port", + 3493: "nut", + 3494: "ibm3494", + 3495: "seclayer-tcp", + 3496: "seclayer-tls", + 3497: "ipether232port", + 3498: "dashpas-port", + 3499: "sccip-media", + 3500: "rtmp-port", + 3501: "isoft-p2p", + 3502: "avinstalldisc", + 3503: "lsp-ping", + 3504: "ironstorm", + 3505: "ccmcomm", + 3506: "apc-3506", + 3507: "nesh-broker", + 3508: "interactionweb", + 3509: "vt-ssl", + 3510: "xss-port", + 3511: "webmail-2", + 3512: "aztec", + 3513: "arcpd", + 3514: "must-p2p", + 3515: "must-backplane", + 3516: "smartcard-port", + 3517: "802-11-iapp", + 3518: "artifact-msg", + 3519: "galileo", + 3520: "galileolog", + 3521: "mc3ss", + 3522: "nssocketport", + 3523: "odeumservlink", + 3524: "ecmport", + 3525: "eisport", + 3526: "starquiz-port", + 3527: "beserver-msg-q", + 3528: "jboss-iiop", + 3529: "jboss-iiop-ssl", + 3530: "gf", + 3531: "joltid", + 3532: "raven-rmp", + 3533: "raven-rdp", + 3534: "urld-port", + 3535: "ms-la", + 3536: "snac", + 3537: "ni-visa-remote", + 3538: "ibm-diradm", + 3539: "ibm-diradm-ssl", + 3540: "pnrp-port", + 3541: "voispeed-port", + 3542: "hacl-monitor", + 3543: "qftest-lookup", + 3544: "teredo", + 3545: "camac", + 3547: "symantec-sim", + 3548: "interworld", + 3549: "tellumat-nms", + 3550: "ssmpp", + 3551: "apcupsd", + 3552: "taserver", + 3553: "rbr-discovery", + 3554: "questnotify", + 3555: "razor", + 3556: "sky-transport", + 3557: "personalos-001", + 3558: "mcp-port", + 3559: "cctv-port", + 3560: "iniserve-port", + 3561: "bmc-onekey", + 3562: "sdbproxy", + 3563: "watcomdebug", + 3564: "esimport", + 3567: "dof-eps", + 3568: "dof-tunnel-sec", + 3569: "mbg-ctrl", + 3570: "mccwebsvr-port", + 3571: "megardsvr-port", + 3572: "megaregsvrport", + 3573: "tag-ups-1", + 3574: "dmaf-caster", + 3575: "ccm-port", + 3576: "cmc-port", + 3577: "config-port", + 3578: "data-port", + 3579: "ttat3lb", + 3580: "nati-svrloc", + 3581: "kfxaclicensing", + 3582: "press", + 3583: "canex-watch", + 3584: "u-dbap", + 3585: "emprise-lls", + 3586: "emprise-lsc", + 3587: "p2pgroup", + 3588: "sentinel", + 3589: "isomair", + 3590: "wv-csp-sms", + 3591: "gtrack-server", + 3592: "gtrack-ne", + 3593: "bpmd", + 3594: "mediaspace", + 3595: "shareapp", + 3596: "iw-mmogame", + 3597: "a14", + 3598: "a15", + 3599: "quasar-server", + 3600: "trap-daemon", + 3601: "visinet-gui", + 3602: "infiniswitchcl", + 3603: "int-rcv-cntrl", + 3604: "bmc-jmx-port", + 3605: "comcam-io", + 3606: "splitlock", + 3607: "precise-i3", + 3608: "trendchip-dcp", + 3609: "cpdi-pidas-cm", + 3610: "echonet", + 3611: "six-degrees", + 3612: "hp-dataprotect", + 3613: "alaris-disc", + 3614: "sigma-port", + 3615: "start-network", + 3616: "cd3o-protocol", + 3617: "sharp-server", + 3618: "aairnet-1", + 3619: "aairnet-2", + 3620: "ep-pcp", + 3621: "ep-nsp", + 3622: "ff-lr-port", + 3623: "haipe-discover", + 3624: "dist-upgrade", + 3625: "volley", + 3626: "bvcdaemon-port", + 3627: "jamserverport", + 3628: "ept-machine", + 3629: "escvpnet", + 3630: "cs-remote-db", + 3631: "cs-services", + 3632: "distcc", + 3633: "wacp", + 3634: "hlibmgr", + 3635: "sdo", + 3636: "servistaitsm", + 3637: "scservp", + 3638: "ehp-backup", + 3639: "xap-ha", + 3640: "netplay-port1", + 3641: "netplay-port2", + 3642: "juxml-port", + 3643: "audiojuggler", + 3644: "ssowatch", + 3645: "cyc", + 3646: "xss-srv-port", + 3647: "splitlock-gw", + 3648: "fjcp", + 3649: "nmmp", + 3650: "prismiq-plugin", + 3651: "xrpc-registry", + 3652: "vxcrnbuport", + 3653: "tsp", + 3654: "vaprtm", + 3655: "abatemgr", + 3656: "abatjss", + 3657: "immedianet-bcn", + 3658: "ps-ams", + 3659: "apple-sasl", + 3660: "can-nds-ssl", + 3661: "can-ferret-ssl", + 3662: "pserver", + 3663: "dtp", + 3664: "ups-engine", + 3665: "ent-engine", + 3666: "eserver-pap", + 3667: "infoexch", + 3668: "dell-rm-port", + 3669: "casanswmgmt", + 3670: "smile", + 3671: "efcp", + 3672: "lispworks-orb", + 3673: "mediavault-gui", + 3674: "wininstall-ipc", + 3675: "calltrax", + 3676: "va-pacbase", + 3677: "roverlog", + 3678: "ipr-dglt", + 3679: "Escale (Newton Dock)", + 3680: "npds-tracker", + 3681: "bts-x73", + 3682: "cas-mapi", + 3683: "bmc-ea", + 3684: "faxstfx-port", + 3685: "dsx-agent", + 3686: "tnmpv2", + 3687: "simple-push", + 3688: "simple-push-s", + 3689: "daap", + 3690: "svn", + 3691: "magaya-network", + 3692: "intelsync", + 3695: "bmc-data-coll", + 3696: "telnetcpcd", + 3697: "nw-license", + 3698: "sagectlpanel", + 3699: "kpn-icw", + 3700: "lrs-paging", + 3701: "netcelera", + 3702: "ws-discovery", + 3703: "adobeserver-3", + 3704: "adobeserver-4", + 3705: "adobeserver-5", + 3706: "rt-event", + 3707: "rt-event-s", + 3708: "sun-as-iiops", + 3709: "ca-idms", + 3710: "portgate-auth", + 3711: "edb-server2", + 3712: "sentinel-ent", + 3713: "tftps", + 3714: "delos-dms", + 3715: "anoto-rendezv", + 3716: "wv-csp-sms-cir", + 3717: "wv-csp-udp-cir", + 3718: "opus-services", + 3719: "itelserverport", + 3720: "ufastro-instr", + 3721: "xsync", + 3722: "xserveraid", + 3723: "sychrond", + 3724: "blizwow", + 3725: "na-er-tip", + 3726: "array-manager", + 3727: "e-mdu", + 3728: "e-woa", + 3729: "fksp-audit", + 3730: "client-ctrl", + 3731: "smap", + 3732: "m-wnn", + 3733: "multip-msg", + 3734: "synel-data", + 3735: "pwdis", + 3736: "rs-rmi", + 3738: "versatalk", + 3739: "launchbird-lm", + 3740: "heartbeat", + 3741: "wysdma", + 3742: "cst-port", + 3743: "ipcs-command", + 3744: "sasg", + 3745: "gw-call-port", + 3746: "linktest", + 3747: "linktest-s", + 3748: "webdata", + 3749: "cimtrak", + 3750: "cbos-ip-port", + 3751: "gprs-cube", + 3752: "vipremoteagent", + 3753: "nattyserver", + 3754: "timestenbroker", + 3755: "sas-remote-hlp", + 3756: "canon-capt", + 3757: "grf-port", + 3758: "apw-registry", + 3759: "exapt-lmgr", + 3760: "adtempusclient", + 3761: "gsakmp", + 3762: "gbs-smp", + 3763: "xo-wave", + 3764: "mni-prot-rout", + 3765: "rtraceroute", + 3767: "listmgr-port", + 3768: "rblcheckd", + 3769: "haipe-otnk", + 3770: "cindycollab", + 3771: "paging-port", + 3772: "ctp", + 3773: "ctdhercules", + 3774: "zicom", + 3775: "ispmmgr", + 3776: "dvcprov-port", + 3777: "jibe-eb", + 3778: "c-h-it-port", + 3779: "cognima", + 3780: "nnp", + 3781: "abcvoice-port", + 3782: "iso-tp0s", + 3783: "bim-pem", + 3784: "bfd-control", + 3785: "bfd-echo", + 3786: "upstriggervsw", + 3787: "fintrx", + 3788: "isrp-port", + 3789: "remotedeploy", + 3790: "quickbooksrds", + 3791: "tvnetworkvideo", + 3792: "sitewatch", + 3793: "dcsoftware", + 3794: "jaus", + 3795: "myblast", + 3796: "spw-dialer", + 3797: "idps", + 3798: "minilock", + 3799: "radius-dynauth", + 3800: "pwgpsi", + 3801: "ibm-mgr", + 3802: "vhd", + 3803: "soniqsync", + 3804: "iqnet-port", + 3805: "tcpdataserver", + 3806: "wsmlb", + 3807: "spugna", + 3808: "sun-as-iiops-ca", + 3809: "apocd", + 3810: "wlanauth", + 3811: "amp", + 3812: "neto-wol-server", + 3813: "rap-ip", + 3814: "neto-dcs", + 3815: "lansurveyorxml", + 3816: "sunlps-http", + 3817: "tapeware", + 3818: "crinis-hb", + 3819: "epl-slp", + 3820: "scp", + 3821: "pmcp", + 3822: "acp-discovery", + 3823: "acp-conduit", + 3824: "acp-policy", + 3825: "ffserver", + 3826: "warmux", + 3827: "netmpi", + 3828: "neteh", + 3829: "neteh-ext", + 3830: "cernsysmgmtagt", + 3831: "dvapps", + 3832: "xxnetserver", + 3833: "aipn-auth", + 3834: "spectardata", + 3835: "spectardb", + 3836: "markem-dcp", + 3837: "mkm-discovery", + 3838: "sos", + 3839: "amx-rms", + 3840: "flirtmitmir", + 3842: "nhci", + 3843: "quest-agent", + 3844: "rnm", + 3845: "v-one-spp", + 3846: "an-pcp", + 3847: "msfw-control", + 3848: "item", + 3849: "spw-dnspreload", + 3850: "qtms-bootstrap", + 3851: "spectraport", + 3852: "sse-app-config", + 3853: "sscan", + 3854: "stryker-com", + 3855: "opentrac", + 3856: "informer", + 3857: "trap-port", + 3858: "trap-port-mom", + 3859: "nav-port", + 3860: "sasp", + 3861: "winshadow-hd", + 3862: "giga-pocket", + 3863: "asap-udp", + 3865: "xpl", + 3866: "dzdaemon", + 3867: "dzoglserver", + 3869: "ovsam-mgmt", + 3870: "ovsam-d-agent", + 3871: "avocent-adsap", + 3872: "oem-agent", + 3873: "fagordnc", + 3874: "sixxsconfig", + 3875: "pnbscada", + 3876: "dl-agent", + 3877: "xmpcr-interface", + 3878: "fotogcad", + 3879: "appss-lm", + 3880: "igrs", + 3881: "idac", + 3882: "msdts1", + 3883: "vrpn", + 3884: "softrack-meter", + 3885: "topflow-ssl", + 3886: "nei-management", + 3887: "ciphire-data", + 3888: "ciphire-serv", + 3889: "dandv-tester", + 3890: "ndsconnect", + 3891: "rtc-pm-port", + 3892: "pcc-image-port", + 3893: "cgi-starapi", + 3894: "syam-agent", + 3895: "syam-smc", + 3896: "sdo-tls", + 3897: "sdo-ssh", + 3898: "senip", + 3899: "itv-control", + 3900: "udt-os", + 3901: "nimsh", + 3902: "nimaux", + 3903: "charsetmgr", + 3904: "omnilink-port", + 3905: "mupdate", + 3906: "topovista-data", + 3907: "imoguia-port", + 3908: "hppronetman", + 3909: "surfcontrolcpa", + 3910: "prnrequest", + 3911: "prnstatus", + 3912: "gbmt-stars", + 3913: "listcrt-port", + 3914: "listcrt-port-2", + 3915: "agcat", + 3916: "wysdmc", + 3917: "aftmux", + 3918: "pktcablemmcops", + 3919: "hyperip", + 3920: "exasoftport1", + 3921: "herodotus-net", + 3922: "sor-update", + 3923: "symb-sb-port", + 3924: "mpl-gprs-port", + 3925: "zmp", + 3926: "winport", + 3927: "natdataservice", + 3928: "netboot-pxe", + 3929: "smauth-port", + 3930: "syam-webserver", + 3931: "msr-plugin-port", + 3932: "dyn-site", + 3933: "plbserve-port", + 3934: "sunfm-port", + 3935: "sdp-portmapper", + 3936: "mailprox", + 3937: "dvbservdsc", + 3938: "dbcontrol-agent", + 3939: "aamp", + 3940: "xecp-node", + 3941: "homeportal-web", + 3942: "srdp", + 3943: "tig", + 3944: "sops", + 3945: "emcads", + 3946: "backupedge", + 3947: "ccp", + 3948: "apdap", + 3949: "drip", + 3950: "namemunge", + 3951: "pwgippfax", + 3952: "i3-sessionmgr", + 3953: "xmlink-connect", + 3954: "adrep", + 3955: "p2pcommunity", + 3956: "gvcp", + 3957: "mqe-broker", + 3958: "mqe-agent", + 3959: "treehopper", + 3960: "bess", + 3961: "proaxess", + 3962: "sbi-agent", + 3963: "thrp", + 3964: "sasggprs", + 3965: "ati-ip-to-ncpe", + 3966: "bflckmgr", + 3967: "ppsms", + 3968: "ianywhere-dbns", + 3969: "landmarks", + 3970: "lanrevagent", + 3971: "lanrevserver", + 3972: "iconp", + 3973: "progistics", + 3974: "citysearch", + 3975: "airshot", + 3976: "opswagent", + 3977: "opswmanager", + 3978: "secure-cfg-svr", + 3979: "smwan", + 3980: "acms", + 3981: "starfish", + 3982: "eis", + 3983: "eisp", + 3984: "mapper-nodemgr", + 3985: "mapper-mapethd", + 3986: "mapper-ws-ethd", + 3987: "centerline", + 3988: "dcs-config", + 3989: "bv-queryengine", + 3990: "bv-is", + 3991: "bv-smcsrv", + 3992: "bv-ds", + 3993: "bv-agent", + 3995: "iss-mgmt-ssl", + 3996: "abcsoftware", + 3997: "agentsease-db", + 3998: "dnx", + 3999: "nvcnet", + 4000: "terabase", + 4001: "newoak", + 4002: "pxc-spvr-ft", + 4003: "pxc-splr-ft", + 4004: "pxc-roid", + 4005: "pxc-pin", + 4006: "pxc-spvr", + 4007: "pxc-splr", + 4008: "netcheque", + 4009: "chimera-hwm", + 4010: "samsung-unidex", + 4011: "altserviceboot", + 4012: "pda-gate", + 4013: "acl-manager", + 4014: "taiclock", + 4015: "talarian-mcast1", + 4016: "talarian-mcast2", + 4017: "talarian-mcast3", + 4018: "talarian-mcast4", + 4019: "talarian-mcast5", + 4020: "trap", + 4021: "nexus-portal", + 4022: "dnox", + 4023: "esnm-zoning", + 4024: "tnp1-port", + 4025: "partimage", + 4026: "as-debug", + 4027: "bxp", + 4028: "dtserver-port", + 4029: "ip-qsig", + 4030: "jdmn-port", + 4031: "suucp", + 4032: "vrts-auth-port", + 4033: "sanavigator", + 4034: "ubxd", + 4035: "wap-push-http", + 4036: "wap-push-https", + 4037: "ravehd", + 4038: "fazzt-ptp", + 4039: "fazzt-admin", + 4040: "yo-main", + 4041: "houston", + 4042: "ldxp", + 4043: "nirp", + 4044: "ltp", + 4045: "npp", + 4046: "acp-proto", + 4047: "ctp-state", + 4049: "wafs", + 4050: "cisco-wafs", + 4051: "cppdp", + 4052: "interact", + 4053: "ccu-comm-1", + 4054: "ccu-comm-2", + 4055: "ccu-comm-3", + 4056: "lms", + 4057: "wfm", + 4058: "kingfisher", + 4059: "dlms-cosem", + 4060: "dsmeter-iatc", + 4061: "ice-location", + 4062: "ice-slocation", + 4063: "ice-router", + 4064: "ice-srouter", + 4065: "avanti-cdp", + 4066: "pmas", + 4067: "idp", + 4068: "ipfltbcst", + 4069: "minger", + 4070: "tripe", + 4071: "aibkup", + 4072: "zieto-sock", + 4073: "iRAPP", + 4074: "cequint-cityid", + 4075: "perimlan", + 4076: "seraph", + 4077: "ascomalarm", + 4079: "santools", + 4080: "lorica-in", + 4081: "lorica-in-sec", + 4082: "lorica-out", + 4083: "lorica-out-sec", + 4084: "fortisphere-vm", + 4086: "ftsync", + 4089: "opencore", + 4090: "omasgport", + 4091: "ewinstaller", + 4092: "ewdgs", + 4093: "pvxpluscs", + 4094: "sysrqd", + 4095: "xtgui", + 4096: "bre", + 4097: "patrolview", + 4098: "drmsfsd", + 4099: "dpcp", + 4100: "igo-incognito", + 4101: "brlp-0", + 4102: "brlp-1", + 4103: "brlp-2", + 4104: "brlp-3", + 4105: "shofar", + 4106: "synchronite", + 4107: "j-ac", + 4108: "accel", + 4109: "izm", + 4110: "g2tag", + 4111: "xgrid", + 4112: "apple-vpns-rp", + 4113: "aipn-reg", + 4114: "jomamqmonitor", + 4115: "cds", + 4116: "smartcard-tls", + 4117: "hillrserv", + 4118: "netscript", + 4119: "assuria-slm", + 4121: "e-builder", + 4122: "fprams", + 4123: "z-wave", + 4124: "tigv2", + 4125: "opsview-envoy", + 4126: "ddrepl", + 4127: "unikeypro", + 4128: "nufw", + 4129: "nuauth", + 4130: "fronet", + 4131: "stars", + 4132: "nuts-dem", + 4133: "nuts-bootp", + 4134: "nifty-hmi", + 4135: "cl-db-attach", + 4136: "cl-db-request", + 4137: "cl-db-remote", + 4138: "nettest", + 4139: "thrtx", + 4140: "cedros-fds", + 4141: "oirtgsvc", + 4142: "oidocsvc", + 4143: "oidsr", + 4145: "vvr-control", + 4146: "tgcconnect", + 4147: "vrxpservman", + 4148: "hhb-handheld", + 4149: "agslb", + 4150: "PowerAlert-nsa", + 4151: "menandmice-noh", + 4152: "idig-mux", + 4153: "mbl-battd", + 4154: "atlinks", + 4155: "bzr", + 4156: "stat-results", + 4157: "stat-scanner", + 4158: "stat-cc", + 4159: "nss", + 4160: "jini-discovery", + 4161: "omscontact", + 4162: "omstopology", + 4163: "silverpeakpeer", + 4164: "silverpeakcomm", + 4165: "altcp", + 4166: "joost", + 4167: "ddgn", + 4168: "pslicser", + 4169: "iadt-disc", + 4172: "pcoip", + 4173: "mma-discovery", + 4174: "sm-disc", + 4177: "wello", + 4178: "storman", + 4179: "MaxumSP", + 4180: "httpx", + 4181: "macbak", + 4182: "pcptcpservice", + 4183: "cyborgnet", + 4184: "universe-suite", + 4185: "wcpp", + 4188: "vatata", + 4191: "dsmipv6", + 4192: "azeti-bd", + 4197: "hctl", + 4199: "eims-admin", + 4300: "corelccam", + 4301: "d-data", + 4302: "d-data-control", + 4303: "srcp", + 4304: "owserver", + 4305: "batman", + 4306: "pinghgl", + 4307: "trueconf", + 4308: "compx-lockview", + 4309: "dserver", + 4310: "mirrtex", + 4320: "fdt-rcatp", + 4321: "rwhois", + 4322: "trim-event", + 4323: "trim-ice", + 4325: "geognosisman", + 4326: "geognosis", + 4327: "jaxer-web", + 4328: "jaxer-manager", + 4333: "ahsp", + 4340: "gaia", + 4341: "lisp-data", + 4342: "lisp-control", + 4343: "unicall", + 4344: "vinainstall", + 4345: "m4-network-as", + 4346: "elanlm", + 4347: "lansurveyor", + 4348: "itose", + 4349: "fsportmap", + 4350: "net-device", + 4351: "plcy-net-svcs", + 4352: "pjlink", + 4353: "f5-iquery", + 4354: "qsnet-trans", + 4355: "qsnet-workst", + 4356: "qsnet-assist", + 4357: "qsnet-cond", + 4358: "qsnet-nucl", + 4359: "omabcastltkm", + 4361: "nacnl", + 4362: "afore-vdp-disc", + 4366: "shadowstream", + 4368: "wxbrief", + 4369: "epmd", + 4370: "elpro-tunnel", + 4371: "l2c-disc", + 4372: "l2c-data", + 4373: "remctl", + 4375: "tolteces", + 4376: "bip", + 4377: "cp-spxsvr", + 4378: "cp-spxdpy", + 4379: "ctdb", + 4389: "xandros-cms", + 4390: "wiegand", + 4394: "apwi-disc", + 4395: "omnivisionesx", + 4400: "ds-srv", + 4401: "ds-srvr", + 4402: "ds-clnt", + 4403: "ds-user", + 4404: "ds-admin", + 4405: "ds-mail", + 4406: "ds-slp", + 4412: "smallchat", + 4413: "avi-nms-disc", + 4416: "pjj-player-disc", + 4418: "axysbridge", + 4420: "nvm-express", + 4425: "netrockey6", + 4426: "beacon-port-2", + 4430: "rsqlserver", + 4432: "l-acoustics", + 4441: "netblox", + 4442: "saris", + 4443: "pharos", + 4444: "krb524", + 4445: "upnotifyp", + 4446: "n1-fwp", + 4447: "n1-rmgmt", + 4448: "asc-slmd", + 4449: "privatewire", + 4450: "camp", + 4451: "ctisystemmsg", + 4452: "ctiprogramload", + 4453: "nssalertmgr", + 4454: "nssagentmgr", + 4455: "prchat-user", + 4456: "prchat-server", + 4457: "prRegister", + 4458: "mcp", + 4484: "hpssmgmt", + 4486: "icms", + 4488: "awacs-ice", + 4500: "ipsec-nat-t", + 4534: "armagetronad", + 4535: "ehs", + 4536: "ehs-ssl", + 4537: "wssauthsvc", + 4538: "swx-gate", + 4545: "worldscores", + 4546: "sf-lm", + 4547: "lanner-lm", + 4548: "synchromesh", + 4549: "aegate", + 4550: "gds-adppiw-db", + 4551: "ieee-mih", + 4552: "menandmice-mon", + 4554: "msfrs", + 4555: "rsip", + 4556: "dtn-bundle", + 4557: "mtcevrunqss", + 4558: "mtcevrunqman", + 4559: "hylafax", + 4566: "kwtc", + 4567: "tram", + 4568: "bmc-reporting", + 4569: "iax", + 4591: "l3t-at-an", + 4592: "hrpd-ith-at-an", + 4593: "ipt-anri-anri", + 4594: "ias-session", + 4595: "ias-paging", + 4596: "ias-neighbor", + 4597: "a21-an-1xbs", + 4598: "a16-an-an", + 4599: "a17-an-an", + 4600: "piranha1", + 4601: "piranha2", + 4621: "ventoso", + 4658: "playsta2-app", + 4659: "playsta2-lob", + 4660: "smaclmgr", + 4661: "kar2ouche", + 4662: "oms", + 4663: "noteit", + 4664: "ems", + 4665: "contclientms", + 4666: "eportcomm", + 4667: "mmacomm", + 4668: "mmaeds", + 4669: "eportcommdata", + 4670: "light", + 4671: "acter", + 4672: "rfa", + 4673: "cxws", + 4674: "appiq-mgmt", + 4675: "dhct-status", + 4676: "dhct-alerts", + 4677: "bcs", + 4678: "traversal", + 4679: "mgesupervision", + 4680: "mgemanagement", + 4681: "parliant", + 4682: "finisar", + 4683: "spike", + 4684: "rfid-rp1", + 4685: "autopac", + 4686: "msp-os", + 4687: "nst", + 4688: "mobile-p2p", + 4689: "altovacentral", + 4690: "prelude", + 4691: "mtn", + 4692: "conspiracy", + 4700: "netxms-agent", + 4701: "netxms-mgmt", + 4702: "netxms-sync", + 4711: "trinity-dist", + 4725: "truckstar", + 4726: "a26-fap-fgw", + 4727: "fcis-disc", + 4728: "capmux", + 4729: "gsmtap", + 4730: "gearman", + 4732: "ohmtrigger", + 4737: "ipdr-sp", + 4738: "solera-lpn", + 4739: "ipfix", + 4740: "ipfixs", + 4741: "lumimgrd", + 4742: "sicct-sdp", + 4743: "openhpid", + 4744: "ifsp", + 4745: "fmp", + 4746: "intelliadm-disc", + 4747: "buschtrommel", + 4749: "profilemac", + 4750: "ssad", + 4751: "spocp", + 4752: "snap", + 4753: "simon-disc", + 4754: "gre-in-udp", + 4755: "gre-udp-dtls", + 4784: "bfd-multi-ctl", + 4785: "cncp", + 4789: "vxlan", + 4790: "vxlan-gpe", + 4791: "roce", + 4800: "iims", + 4801: "iwec", + 4802: "ilss", + 4803: "notateit-disc", + 4804: "aja-ntv4-disc", + 4827: "htcp", + 4837: "varadero-0", + 4838: "varadero-1", + 4839: "varadero-2", + 4840: "opcua-udp", + 4841: "quosa", + 4842: "gw-asv", + 4843: "opcua-tls", + 4844: "gw-log", + 4845: "wcr-remlib", + 4846: "contamac-icm", + 4847: "wfc", + 4848: "appserv-http", + 4849: "appserv-https", + 4850: "sun-as-nodeagt", + 4851: "derby-repli", + 4867: "unify-debug", + 4868: "phrelay", + 4869: "phrelaydbg", + 4870: "cc-tracking", + 4871: "wired", + 4876: "tritium-can", + 4877: "lmcs", + 4878: "inst-discovery", + 4881: "socp-t", + 4882: "socp-c", + 4884: "hivestor", + 4885: "abbs", + 4894: "lyskom", + 4899: "radmin-port", + 4900: "hfcs", + 4914: "bones", + 4936: "an-signaling", + 4937: "atsc-mh-ssc", + 4940: "eq-office-4940", + 4941: "eq-office-4941", + 4942: "eq-office-4942", + 4949: "munin", + 4950: "sybasesrvmon", + 4951: "pwgwims", + 4952: "sagxtsds", + 4969: "ccss-qmm", + 4970: "ccss-qsm", + 4980: "ctxs-vpp", + 4986: "mrip", + 4987: "smar-se-port1", + 4988: "smar-se-port2", + 4989: "parallel", + 4990: "busycal", + 4991: "vrt", + 4999: "hfcs-manager", + 5000: "commplex-main", + 5001: "commplex-link", + 5002: "rfe", + 5003: "fmpro-internal", + 5004: "avt-profile-1", + 5005: "avt-profile-2", + 5006: "wsm-server", + 5007: "wsm-server-ssl", + 5008: "synapsis-edge", + 5009: "winfs", + 5010: "telelpathstart", + 5011: "telelpathattack", + 5012: "nsp", + 5013: "fmpro-v6", + 5014: "onpsocket", + 5020: "zenginkyo-1", + 5021: "zenginkyo-2", + 5022: "mice", + 5023: "htuilsrv", + 5024: "scpi-telnet", + 5025: "scpi-raw", + 5026: "strexec-d", + 5027: "strexec-s", + 5029: "infobright", + 5030: "surfpass", + 5031: "dmp", + 5042: "asnaacceler8db", + 5043: "swxadmin", + 5044: "lxi-evntsvc", + 5046: "vpm-udp", + 5047: "iscape", + 5049: "ivocalize", + 5050: "mmcc", + 5051: "ita-agent", + 5052: "ita-manager", + 5053: "rlm-disc", + 5055: "unot", + 5056: "intecom-ps1", + 5057: "intecom-ps2", + 5058: "locus-disc", + 5059: "sds", + 5060: "sip", + 5061: "sips", + 5062: "na-localise", + 5064: "ca-1", + 5065: "ca-2", + 5066: "stanag-5066", + 5067: "authentx", + 5069: "i-net-2000-npr", + 5070: "vtsas", + 5071: "powerschool", + 5072: "ayiya", + 5073: "tag-pm", + 5074: "alesquery", + 5078: "pixelpusher", + 5079: "cp-spxrpts", + 5080: "onscreen", + 5081: "sdl-ets", + 5082: "qcp", + 5083: "qfp", + 5084: "llrp", + 5085: "encrypted-llrp", + 5092: "magpie", + 5093: "sentinel-lm", + 5094: "hart-ip", + 5099: "sentlm-srv2srv", + 5100: "socalia", + 5101: "talarian-udp", + 5102: "oms-nonsecure", + 5104: "tinymessage", + 5105: "hughes-ap", + 5111: "taep-as-svc", + 5112: "pm-cmdsvr", + 5116: "emb-proj-cmd", + 5120: "barracuda-bbs", + 5133: "nbt-pc", + 5136: "minotaur-sa", + 5137: "ctsd", + 5145: "rmonitor-secure", + 5150: "atmp", + 5151: "esri-sde", + 5152: "sde-discovery", + 5154: "bzflag", + 5155: "asctrl-agent", + 5164: "vpa-disc", + 5165: "ife-icorp", + 5166: "winpcs", + 5167: "scte104", + 5168: "scte30", + 5190: "aol", + 5191: "aol-1", + 5192: "aol-2", + 5193: "aol-3", + 5200: "targus-getdata", + 5201: "targus-getdata1", + 5202: "targus-getdata2", + 5203: "targus-getdata3", + 5223: "hpvirtgrp", + 5224: "hpvirtctrl", + 5225: "hp-server", + 5226: "hp-status", + 5227: "perfd", + 5234: "eenet", + 5235: "galaxy-network", + 5236: "padl2sim", + 5237: "mnet-discovery", + 5245: "downtools-disc", + 5246: "capwap-control", + 5247: "capwap-data", + 5248: "caacws", + 5249: "caaclang2", + 5250: "soagateway", + 5251: "caevms", + 5252: "movaz-ssc", + 5264: "3com-njack-1", + 5265: "3com-njack-2", + 5270: "cartographerxmp", + 5271: "cuelink-disc", + 5272: "pk", + 5282: "transmit-port", + 5298: "presence", + 5299: "nlg-data", + 5300: "hacl-hb", + 5301: "hacl-gs", + 5302: "hacl-cfg", + 5303: "hacl-probe", + 5304: "hacl-local", + 5305: "hacl-test", + 5306: "sun-mc-grp", + 5307: "sco-aip", + 5308: "cfengine", + 5309: "jprinter", + 5310: "outlaws", + 5312: "permabit-cs", + 5313: "rrdp", + 5314: "opalis-rbt-ipc", + 5315: "hacl-poll", + 5343: "kfserver", + 5344: "xkotodrcp", + 5349: "stuns", + 5350: "pcp-multicast", + 5351: "pcp", + 5352: "dns-llq", + 5353: "mdns", + 5354: "mdnsresponder", + 5355: "llmnr", + 5356: "ms-smlbiz", + 5357: "wsdapi", + 5358: "wsdapi-s", + 5359: "ms-alerter", + 5360: "ms-sideshow", + 5361: "ms-s-sideshow", + 5362: "serverwsd2", + 5363: "net-projection", + 5364: "kdnet", + 5397: "stresstester", + 5398: "elektron-admin", + 5399: "securitychase", + 5400: "excerpt", + 5401: "excerpts", + 5402: "mftp", + 5403: "hpoms-ci-lstn", + 5404: "hpoms-dps-lstn", + 5405: "netsupport", + 5406: "systemics-sox", + 5407: "foresyte-clear", + 5408: "foresyte-sec", + 5409: "salient-dtasrv", + 5410: "salient-usrmgr", + 5411: "actnet", + 5412: "continuus", + 5413: "wwiotalk", + 5414: "statusd", + 5415: "ns-server", + 5416: "sns-gateway", + 5417: "sns-agent", + 5418: "mcntp", + 5419: "dj-ice", + 5420: "cylink-c", + 5421: "netsupport2", + 5422: "salient-mux", + 5423: "virtualuser", + 5424: "beyond-remote", + 5425: "br-channel", + 5426: "devbasic", + 5427: "sco-peer-tta", + 5428: "telaconsole", + 5429: "base", + 5430: "radec-corp", + 5431: "park-agent", + 5432: "postgresql", + 5433: "pyrrho", + 5434: "sgi-arrayd", + 5435: "sceanics", + 5436: "pmip6-cntl", + 5437: "pmip6-data", + 5443: "spss", + 5450: "tiepie-disc", + 5453: "surebox", + 5454: "apc-5454", + 5455: "apc-5455", + 5456: "apc-5456", + 5461: "silkmeter", + 5462: "ttl-publisher", + 5463: "ttlpriceproxy", + 5464: "quailnet", + 5465: "netops-broker", + 5474: "apsolab-rpc", + 5500: "fcp-addr-srvr1", + 5501: "fcp-addr-srvr2", + 5502: "fcp-srvr-inst1", + 5503: "fcp-srvr-inst2", + 5504: "fcp-cics-gw1", + 5505: "checkoutdb", + 5506: "amc", + 5553: "sgi-eventmond", + 5554: "sgi-esphttp", + 5555: "personal-agent", + 5556: "freeciv", + 5567: "dof-dps-mc-sec", + 5568: "sdt", + 5569: "rdmnet-device", + 5573: "sdmmp", + 5580: "tmosms0", + 5581: "tmosms1", + 5582: "fac-restore", + 5583: "tmo-icon-sync", + 5584: "bis-web", + 5585: "bis-sync", + 5597: "ininmessaging", + 5598: "mctfeed", + 5599: "esinstall", + 5600: "esmmanager", + 5601: "esmagent", + 5602: "a1-msc", + 5603: "a1-bs", + 5604: "a3-sdunode", + 5605: "a4-sdunode", + 5627: "ninaf", + 5628: "htrust", + 5629: "symantec-sfdb", + 5630: "precise-comm", + 5631: "pcanywheredata", + 5632: "pcanywherestat", + 5633: "beorl", + 5634: "xprtld", + 5670: "zre-disc", + 5671: "amqps", + 5672: "amqp", + 5673: "jms", + 5674: "hyperscsi-port", + 5675: "v5ua", + 5676: "raadmin", + 5677: "questdb2-lnchr", + 5678: "rrac", + 5679: "dccm", + 5680: "auriga-router", + 5681: "ncxcp", + 5682: "brightcore", + 5683: "coap", + 5684: "coaps", + 5687: "gog-multiplayer", + 5688: "ggz", + 5689: "qmvideo", + 5713: "proshareaudio", + 5714: "prosharevideo", + 5715: "prosharedata", + 5716: "prosharerequest", + 5717: "prosharenotify", + 5718: "dpm", + 5719: "dpm-agent", + 5720: "ms-licensing", + 5721: "dtpt", + 5722: "msdfsr", + 5723: "omhs", + 5724: "omsdk", + 5728: "io-dist-group", + 5729: "openmail", + 5730: "unieng", + 5741: "ida-discover1", + 5742: "ida-discover2", + 5743: "watchdoc-pod", + 5744: "watchdoc", + 5745: "fcopy-server", + 5746: "fcopys-server", + 5747: "tunatic", + 5748: "tunalyzer", + 5750: "rscd", + 5755: "openmailg", + 5757: "x500ms", + 5766: "openmailns", + 5767: "s-openmail", + 5768: "openmailpxy", + 5769: "spramsca", + 5770: "spramsd", + 5771: "netagent", + 5777: "dali-port", + 5781: "3par-evts", + 5782: "3par-mgmt", + 5783: "3par-mgmt-ssl", + 5784: "ibar", + 5785: "3par-rcopy", + 5786: "cisco-redu", + 5787: "waascluster", + 5793: "xtreamx", + 5794: "spdp", + 5813: "icmpd", + 5814: "spt-automation", + 5859: "wherehoo", + 5863: "ppsuitemsg", + 5900: "rfb", + 5910: "cm", + 5911: "cpdlc", + 5912: "fis", + 5913: "ads-c", + 5963: "indy", + 5968: "mppolicy-v5", + 5969: "mppolicy-mgr", + 5984: "couchdb", + 5985: "wsman", + 5986: "wsmans", + 5987: "wbem-rmi", + 5988: "wbem-http", + 5989: "wbem-https", + 5990: "wbem-exp-https", + 5991: "nuxsl", + 5992: "consul-insight", + 5999: "cvsup", + 6064: "ndl-ahp-svc", + 6065: "winpharaoh", + 6066: "ewctsp", + 6069: "trip", + 6070: "messageasap", + 6071: "ssdtp", + 6072: "diagnose-proc", + 6073: "directplay8", + 6074: "max", + 6080: "gue", + 6081: "geneve", + 6082: "p25cai", + 6083: "miami-bcast", + 6085: "konspire2b", + 6086: "pdtp", + 6087: "ldss", + 6088: "doglms-notify", + 6100: "synchronet-db", + 6101: "synchronet-rtc", + 6102: "synchronet-upd", + 6103: "rets", + 6104: "dbdb", + 6105: "primaserver", + 6106: "mpsserver", + 6107: "etc-control", + 6108: "sercomm-scadmin", + 6109: "globecast-id", + 6110: "softcm", + 6111: "spc", + 6112: "dtspcd", + 6118: "tipc", + 6122: "bex-webadmin", + 6123: "backup-express", + 6124: "pnbs", + 6133: "nbt-wol", + 6140: "pulsonixnls", + 6141: "meta-corp", + 6142: "aspentec-lm", + 6143: "watershed-lm", + 6144: "statsci1-lm", + 6145: "statsci2-lm", + 6146: "lonewolf-lm", + 6147: "montage-lm", + 6148: "ricardo-lm", + 6149: "tal-pod", + 6160: "ecmp-data", + 6161: "patrol-ism", + 6162: "patrol-coll", + 6163: "pscribe", + 6200: "lm-x", + 6201: "thermo-calc", + 6209: "qmtps", + 6222: "radmind", + 6241: "jeol-nsddp-1", + 6242: "jeol-nsddp-2", + 6243: "jeol-nsddp-3", + 6244: "jeol-nsddp-4", + 6251: "tl1-raw-ssl", + 6252: "tl1-ssh", + 6253: "crip", + 6268: "grid", + 6269: "grid-alt", + 6300: "bmc-grx", + 6301: "bmc-ctd-ldap", + 6306: "ufmp", + 6315: "scup-disc", + 6316: "abb-escp", + 6317: "nav-data", + 6320: "repsvc", + 6321: "emp-server1", + 6322: "emp-server2", + 6324: "hrd-ns-disc", + 6343: "sflow", + 6346: "gnutella-svc", + 6347: "gnutella-rtr", + 6350: "adap", + 6355: "pmcs", + 6360: "metaedit-mu", + 6363: "ndn", + 6370: "metaedit-se", + 6382: "metatude-mds", + 6389: "clariion-evr01", + 6390: "metaedit-ws", + 6417: "faxcomservice", + 6419: "svdrp-disc", + 6420: "nim-vdrshell", + 6421: "nim-wan", + 6443: "sun-sr-https", + 6444: "sge-qmaster", + 6445: "sge-execd", + 6446: "mysql-proxy", + 6455: "skip-cert-recv", + 6456: "skip-cert-send", + 6464: "ieee11073-20701", + 6471: "lvision-lm", + 6480: "sun-sr-http", + 6481: "servicetags", + 6482: "ldoms-mgmt", + 6483: "SunVTS-RMI", + 6484: "sun-sr-jms", + 6485: "sun-sr-iiop", + 6486: "sun-sr-iiops", + 6487: "sun-sr-iiop-aut", + 6488: "sun-sr-jmx", + 6489: "sun-sr-admin", + 6500: "boks", + 6501: "boks-servc", + 6502: "boks-servm", + 6503: "boks-clntd", + 6505: "badm-priv", + 6506: "badm-pub", + 6507: "bdir-priv", + 6508: "bdir-pub", + 6509: "mgcs-mfp-port", + 6510: "mcer-port", + 6511: "dccp-udp", + 6514: "syslog-tls", + 6515: "elipse-rec", + 6543: "lds-distrib", + 6544: "lds-dump", + 6547: "apc-6547", + 6548: "apc-6548", + 6549: "apc-6549", + 6550: "fg-sysupdate", + 6551: "sum", + 6558: "xdsxdm", + 6566: "sane-port", + 6568: "rp-reputation", + 6579: "affiliate", + 6580: "parsec-master", + 6581: "parsec-peer", + 6582: "parsec-game", + 6583: "joaJewelSuite", + 6619: "odette-ftps", + 6620: "kftp-data", + 6621: "kftp", + 6622: "mcftp", + 6623: "ktelnet", + 6626: "wago-service", + 6627: "nexgen", + 6628: "afesc-mc", + 6629: "nexgen-aux", + 6633: "cisco-vpath-tun", + 6634: "mpls-pm", + 6635: "mpls-udp", + 6636: "mpls-udp-dtls", + 6653: "openflow", + 6657: "palcom-disc", + 6670: "vocaltec-gold", + 6671: "p4p-portal", + 6672: "vision-server", + 6673: "vision-elmd", + 6678: "vfbp-disc", + 6679: "osaut", + 6689: "tsa", + 6696: "babel", + 6701: "kti-icad-srvr", + 6702: "e-design-net", + 6703: "e-design-web", + 6714: "ibprotocol", + 6715: "fibotrader-com", + 6767: "bmc-perf-agent", + 6768: "bmc-perf-mgrd", + 6769: "adi-gxp-srvprt", + 6770: "plysrv-http", + 6771: "plysrv-https", + 6784: "bfd-lag", + 6785: "dgpf-exchg", + 6786: "smc-jmx", + 6787: "smc-admin", + 6788: "smc-http", + 6790: "hnmp", + 6791: "hnm", + 6801: "acnet", + 6831: "ambit-lm", + 6841: "netmo-default", + 6842: "netmo-http", + 6850: "iccrushmore", + 6868: "acctopus-st", + 6888: "muse", + 6935: "ethoscan", + 6936: "xsmsvc", + 6946: "bioserver", + 6951: "otlp", + 6961: "jmact3", + 6962: "jmevt2", + 6963: "swismgr1", + 6964: "swismgr2", + 6965: "swistrap", + 6966: "swispol", + 6969: "acmsoda", + 6997: "MobilitySrv", + 6998: "iatp-highpri", + 6999: "iatp-normalpri", + 7000: "afs3-fileserver", + 7001: "afs3-callback", + 7002: "afs3-prserver", + 7003: "afs3-vlserver", + 7004: "afs3-kaserver", + 7005: "afs3-volser", + 7006: "afs3-errors", + 7007: "afs3-bos", + 7008: "afs3-update", + 7009: "afs3-rmtsys", + 7010: "ups-onlinet", + 7011: "talon-disc", + 7012: "talon-engine", + 7013: "microtalon-dis", + 7014: "microtalon-com", + 7015: "talon-webserver", + 7016: "spg", + 7017: "grasp", + 7019: "doceri-view", + 7020: "dpserve", + 7021: "dpserveadmin", + 7022: "ctdp", + 7023: "ct2nmcs", + 7024: "vmsvc", + 7025: "vmsvc-2", + 7030: "op-probe", + 7040: "quest-disc", + 7070: "arcp", + 7071: "iwg1", + 7080: "empowerid", + 7088: "zixi-transport", + 7095: "jdp-disc", + 7099: "lazy-ptop", + 7100: "font-service", + 7101: "elcn", + 7107: "aes-x170", + 7121: "virprot-lm", + 7128: "scenidm", + 7129: "scenccs", + 7161: "cabsm-comm", + 7162: "caistoragemgr", + 7163: "cacsambroker", + 7164: "fsr", + 7165: "doc-server", + 7166: "aruba-server", + 7169: "ccag-pib", + 7170: "nsrp", + 7171: "drm-production", + 7174: "clutild", + 7181: "janus-disc", + 7200: "fodms", + 7201: "dlip", + 7227: "ramp", + 7235: "aspcoordination", + 7244: "frc-hicp-disc", + 7262: "cnap", + 7272: "watchme-7272", + 7273: "oma-rlp", + 7274: "oma-rlp-s", + 7275: "oma-ulp", + 7276: "oma-ilp", + 7277: "oma-ilp-s", + 7278: "oma-dcdocbs", + 7279: "ctxlic", + 7280: "itactionserver1", + 7281: "itactionserver2", + 7282: "mzca-alert", + 7365: "lcm-server", + 7391: "mindfilesys", + 7392: "mrssrendezvous", + 7393: "nfoldman", + 7394: "fse", + 7395: "winqedit", + 7397: "hexarc", + 7400: "rtps-discovery", + 7401: "rtps-dd-ut", + 7402: "rtps-dd-mt", + 7410: "ionixnetmon", + 7411: "daqstream", + 7421: "mtportmon", + 7426: "pmdmgr", + 7427: "oveadmgr", + 7428: "ovladmgr", + 7429: "opi-sock", + 7430: "xmpv7", + 7431: "pmd", + 7437: "faximum", + 7443: "oracleas-https", + 7473: "rise", + 7491: "telops-lmd", + 7500: "silhouette", + 7501: "ovbus", + 7510: "ovhpas", + 7511: "pafec-lm", + 7542: "saratoga", + 7543: "atul", + 7544: "nta-ds", + 7545: "nta-us", + 7546: "cfs", + 7547: "cwmp", + 7548: "tidp", + 7549: "nls-tl", + 7550: "cloudsignaling", + 7560: "sncp", + 7566: "vsi-omega", + 7570: "aries-kfinder", + 7574: "coherence-disc", + 7588: "sun-lm", + 7606: "mipi-debug", + 7624: "indi", + 7627: "soap-http", + 7628: "zen-pawn", + 7629: "xdas", + 7633: "pmdfmgt", + 7648: "cuseeme", + 7674: "imqtunnels", + 7675: "imqtunnel", + 7676: "imqbrokerd", + 7677: "sun-user-https", + 7680: "pando-pub", + 7689: "collaber", + 7697: "klio", + 7707: "sync-em7", + 7708: "scinet", + 7720: "medimageportal", + 7724: "nsdeepfreezectl", + 7725: "nitrogen", + 7726: "freezexservice", + 7727: "trident-data", + 7728: "osvr", + 7734: "smip", + 7738: "aiagent", + 7741: "scriptview", + 7743: "sstp-1", + 7744: "raqmon-pdu", + 7747: "prgp", + 7777: "cbt", + 7778: "interwise", + 7779: "vstat", + 7781: "accu-lmgr", + 7784: "s-bfd", + 7786: "minivend", + 7787: "popup-reminders", + 7789: "office-tools", + 7794: "q3ade", + 7797: "pnet-conn", + 7798: "pnet-enc", + 7799: "altbsdp", + 7800: "asr", + 7801: "ssp-client", + 7802: "vns-tp", + 7810: "rbt-wanopt", + 7845: "apc-7845", + 7846: "apc-7846", + 7872: "mipv6tls", + 7880: "pss", + 7887: "ubroker", + 7900: "mevent", + 7901: "tnos-sp", + 7902: "tnos-dp", + 7903: "tnos-dps", + 7913: "qo-secure", + 7932: "t2-drm", + 7933: "t2-brm", + 7962: "generalsync", + 7967: "supercell", + 7979: "micromuse-ncps", + 7980: "quest-vista", + 7982: "sossd-disc", + 7998: "usicontentpush", + 7999: "irdmi2", + 8000: "irdmi", + 8001: "vcom-tunnel", + 8002: "teradataordbms", + 8003: "mcreport", + 8005: "mxi", + 8006: "wpl-disc", + 8007: "warppipe", + 8008: "http-alt", + 8019: "qbdb", + 8020: "intu-ec-svcdisc", + 8021: "intu-ec-client", + 8022: "oa-system", + 8025: "ca-audit-da", + 8026: "ca-audit-ds", + 8032: "pro-ed", + 8033: "mindprint", + 8034: "vantronix-mgmt", + 8040: "ampify", + 8041: "enguity-xccetp", + 8052: "senomix01", + 8053: "senomix02", + 8054: "senomix03", + 8055: "senomix04", + 8056: "senomix05", + 8057: "senomix06", + 8058: "senomix07", + 8059: "senomix08", + 8060: "aero", + 8074: "gadugadu", + 8080: "http-alt", + 8081: "sunproxyadmin", + 8082: "us-cli", + 8083: "us-srv", + 8086: "d-s-n", + 8087: "simplifymedia", + 8088: "radan-http", + 8097: "sac", + 8100: "xprint-server", + 8115: "mtl8000-matrix", + 8116: "cp-cluster", + 8118: "privoxy", + 8121: "apollo-data", + 8122: "apollo-admin", + 8128: "paycash-online", + 8129: "paycash-wbp", + 8130: "indigo-vrmi", + 8131: "indigo-vbcp", + 8132: "dbabble", + 8148: "isdd", + 8149: "eor-game", + 8160: "patrol", + 8161: "patrol-snmp", + 8182: "vmware-fdm", + 8184: "itach", + 8192: "spytechphone", + 8194: "blp1", + 8195: "blp2", + 8199: "vvr-data", + 8200: "trivnet1", + 8201: "trivnet2", + 8202: "aesop", + 8204: "lm-perfworks", + 8205: "lm-instmgr", + 8206: "lm-dta", + 8207: "lm-sserver", + 8208: "lm-webwatcher", + 8230: "rexecj", + 8231: "hncp-udp-port", + 8232: "hncp-dtls-port", + 8243: "synapse-nhttps", + 8276: "pando-sec", + 8280: "synapse-nhttp", + 8282: "libelle-disc", + 8292: "blp3", + 8294: "blp4", + 8300: "tmi", + 8301: "amberon", + 8320: "tnp-discover", + 8321: "tnp", + 8322: "garmin-marine", + 8351: "server-find", + 8376: "cruise-enum", + 8377: "cruise-swroute", + 8378: "cruise-config", + 8379: "cruise-diags", + 8380: "cruise-update", + 8383: "m2mservices", + 8384: "marathontp", + 8400: "cvd", + 8401: "sabarsd", + 8402: "abarsd", + 8403: "admind", + 8416: "espeech", + 8417: "espeech-rtp", + 8442: "cybro-a-bus", + 8443: "pcsync-https", + 8444: "pcsync-http", + 8445: "copy-disc", + 8450: "npmp", + 8472: "otv", + 8473: "vp2p", + 8474: "noteshare", + 8500: "fmtp", + 8501: "cmtp-av", + 8503: "lsp-self-ping", + 8554: "rtsp-alt", + 8555: "d-fence", + 8567: "dof-tunnel", + 8600: "asterix", + 8609: "canon-cpp-disc", + 8610: "canon-mfnp", + 8611: "canon-bjnp1", + 8612: "canon-bjnp2", + 8613: "canon-bjnp3", + 8614: "canon-bjnp4", + 8675: "msi-cps-rm-disc", + 8686: "sun-as-jmxrmi", + 8732: "dtp-net", + 8733: "ibus", + 8763: "mc-appserver", + 8764: "openqueue", + 8765: "ultraseek-http", + 8766: "amcs", + 8770: "dpap", + 8786: "msgclnt", + 8787: "msgsrvr", + 8793: "acd-pm", + 8800: "sunwebadmin", + 8804: "truecm", + 8805: "pfcp", + 8808: "ssports-bcast", + 8873: "dxspider", + 8880: "cddbp-alt", + 8883: "secure-mqtt", + 8888: "ddi-udp-1", + 8889: "ddi-udp-2", + 8890: "ddi-udp-3", + 8891: "ddi-udp-4", + 8892: "ddi-udp-5", + 8893: "ddi-udp-6", + 8894: "ddi-udp-7", + 8899: "ospf-lite", + 8900: "jmb-cds1", + 8901: "jmb-cds2", + 8910: "manyone-http", + 8911: "manyone-xml", + 8912: "wcbackup", + 8913: "dragonfly", + 8954: "cumulus-admin", + 8980: "nod-provider", + 8981: "nod-client", + 8989: "sunwebadmins", + 8990: "http-wmap", + 8991: "https-wmap", + 8999: "bctp", + 9000: "cslistener", + 9001: "etlservicemgr", + 9002: "dynamid", + 9007: "ogs-client", + 9009: "pichat", + 9020: "tambora", + 9021: "panagolin-ident", + 9022: "paragent", + 9023: "swa-1", + 9024: "swa-2", + 9025: "swa-3", + 9026: "swa-4", + 9060: "CardWeb-RT", + 9080: "glrpc", + 9084: "aurora", + 9085: "ibm-rsyscon", + 9086: "net2display", + 9087: "classic", + 9088: "sqlexec", + 9089: "sqlexec-ssl", + 9090: "websm", + 9091: "xmltec-xmlmail", + 9092: "XmlIpcRegSvc", + 9100: "hp-pdl-datastr", + 9101: "bacula-dir", + 9102: "bacula-fd", + 9103: "bacula-sd", + 9104: "peerwire", + 9105: "xadmin", + 9106: "astergate-disc", + 9119: "mxit", + 9131: "dddp", + 9160: "apani1", + 9161: "apani2", + 9162: "apani3", + 9163: "apani4", + 9164: "apani5", + 9191: "sun-as-jpda", + 9200: "wap-wsp", + 9201: "wap-wsp-wtp", + 9202: "wap-wsp-s", + 9203: "wap-wsp-wtp-s", + 9204: "wap-vcard", + 9205: "wap-vcal", + 9206: "wap-vcard-s", + 9207: "wap-vcal-s", + 9208: "rjcdb-vcards", + 9209: "almobile-system", + 9210: "oma-mlp", + 9211: "oma-mlp-s", + 9212: "serverviewdbms", + 9213: "serverstart", + 9214: "ipdcesgbs", + 9215: "insis", + 9216: "acme", + 9217: "fsc-port", + 9222: "teamcoherence", + 9255: "mon", + 9277: "traingpsdata", + 9278: "pegasus", + 9279: "pegasus-ctl", + 9280: "pgps", + 9281: "swtp-port1", + 9282: "swtp-port2", + 9283: "callwaveiam", + 9284: "visd", + 9285: "n2h2server", + 9286: "n2receive", + 9287: "cumulus", + 9292: "armtechdaemon", + 9293: "storview", + 9294: "armcenterhttp", + 9295: "armcenterhttps", + 9300: "vrace", + 9318: "secure-ts", + 9321: "guibase", + 9343: "mpidcmgr", + 9344: "mphlpdmc", + 9346: "ctechlicensing", + 9374: "fjdmimgr", + 9380: "boxp", + 9396: "fjinvmgr", + 9397: "mpidcagt", + 9400: "sec-t4net-srv", + 9401: "sec-t4net-clt", + 9402: "sec-pc2fax-srv", + 9418: "git", + 9443: "tungsten-https", + 9444: "wso2esb-console", + 9450: "sntlkeyssrvr", + 9500: "ismserver", + 9522: "sma-spw", + 9535: "mngsuite", + 9536: "laes-bf", + 9555: "trispen-sra", + 9592: "ldgateway", + 9593: "cba8", + 9594: "msgsys", + 9595: "pds", + 9596: "mercury-disc", + 9597: "pd-admin", + 9598: "vscp", + 9599: "robix", + 9600: "micromuse-ncpw", + 9612: "streamcomm-ds", + 9618: "condor", + 9628: "odbcpathway", + 9629: "uniport", + 9632: "mc-comm", + 9667: "xmms2", + 9668: "tec5-sdctp", + 9694: "client-wakeup", + 9695: "ccnx", + 9700: "board-roar", + 9747: "l5nas-parchan", + 9750: "board-voip", + 9753: "rasadv", + 9762: "tungsten-http", + 9800: "davsrc", + 9801: "sstp-2", + 9802: "davsrcs", + 9875: "sapv1", + 9878: "kca-service", + 9888: "cyborg-systems", + 9889: "gt-proxy", + 9898: "monkeycom", + 9899: "sctp-tunneling", + 9900: "iua", + 9901: "enrp", + 9903: "multicast-ping", + 9909: "domaintime", + 9911: "sype-transport", + 9950: "apc-9950", + 9951: "apc-9951", + 9952: "apc-9952", + 9953: "acis", + 9955: "alljoyn-mcm", + 9956: "alljoyn", + 9966: "odnsp", + 9987: "dsm-scm-target", + 9990: "osm-appsrvr", + 9991: "osm-oev", + 9992: "palace-1", + 9993: "palace-2", + 9994: "palace-3", + 9995: "palace-4", + 9996: "palace-5", + 9997: "palace-6", + 9998: "distinct32", + 9999: "distinct", + 10000: "ndmp", + 10001: "scp-config", + 10002: "documentum", + 10003: "documentum-s", + 10007: "mvs-capacity", + 10008: "octopus", + 10009: "swdtp-sv", + 10050: "zabbix-agent", + 10051: "zabbix-trapper", + 10080: "amanda", + 10081: "famdc", + 10100: "itap-ddtp", + 10101: "ezmeeting-2", + 10102: "ezproxy-2", + 10103: "ezrelay", + 10104: "swdtp", + 10107: "bctp-server", + 10110: "nmea-0183", + 10111: "nmea-onenet", + 10113: "netiq-endpoint", + 10114: "netiq-qcheck", + 10115: "netiq-endpt", + 10116: "netiq-voipa", + 10117: "iqrm", + 10128: "bmc-perf-sd", + 10160: "qb-db-server", + 10161: "snmpdtls", + 10162: "snmpdtls-trap", + 10200: "trisoap", + 10201: "rscs", + 10252: "apollo-relay", + 10253: "eapol-relay", + 10260: "axis-wimp-port", + 10288: "blocks", + 10439: "bngsync", + 10500: "hip-nat-t", + 10540: "MOS-lower", + 10541: "MOS-upper", + 10542: "MOS-aux", + 10543: "MOS-soap", + 10544: "MOS-soap-opt", + 10800: "gap", + 10805: "lpdg", + 10810: "nmc-disc", + 10860: "helix", + 10880: "bveapi", + 10990: "rmiaux", + 11000: "irisa", + 11001: "metasys", + 10023: "cefd-vmp", + 11095: "weave", + 11106: "sgi-lk", + 11108: "myq-termlink", + 11111: "vce", + 11112: "dicom", + 11161: "suncacao-snmp", + 11162: "suncacao-jmxmp", + 11163: "suncacao-rmi", + 11164: "suncacao-csa", + 11165: "suncacao-websvc", + 11171: "snss", + 11201: "smsqp", + 11208: "wifree", + 11211: "memcache", + 11319: "imip", + 11320: "imip-channels", + 11321: "arena-server", + 11367: "atm-uhas", + 11371: "hkp", + 11430: "lsdp", + 11600: "tempest-port", + 11720: "h323callsigalt", + 11723: "emc-xsw-dcache", + 11751: "intrepid-ssl", + 11796: "lanschool-mpt", + 11876: "xoraya", + 11877: "x2e-disc", + 11967: "sysinfo-sp", + 12000: "entextxid", + 12001: "entextnetwk", + 12002: "entexthigh", + 12003: "entextmed", + 12004: "entextlow", + 12005: "dbisamserver1", + 12006: "dbisamserver2", + 12007: "accuracer", + 12008: "accuracer-dbms", + 12009: "ghvpn", + 12012: "vipera", + 12013: "vipera-ssl", + 12109: "rets-ssl", + 12121: "nupaper-ss", + 12168: "cawas", + 12172: "hivep", + 12300: "linogridengine", + 12321: "warehouse-sss", + 12322: "warehouse", + 12345: "italk", + 12753: "tsaf", + 13160: "i-zipqd", + 13216: "bcslogc", + 13217: "rs-pias", + 13218: "emc-vcas-udp", + 13223: "powwow-client", + 13224: "powwow-server", + 13400: "doip-disc", + 13720: "bprd", + 13721: "bpdbm", + 13722: "bpjava-msvc", + 13724: "vnetd", + 13782: "bpcd", + 13783: "vopied", + 13785: "nbdb", + 13786: "nomdb", + 13818: "dsmcc-config", + 13819: "dsmcc-session", + 13820: "dsmcc-passthru", + 13821: "dsmcc-download", + 13822: "dsmcc-ccp", + 13894: "ucontrol", + 13929: "dta-systems", + 14000: "scotty-ft", + 14001: "sua", + 14002: "scotty-disc", + 14033: "sage-best-com1", + 14034: "sage-best-com2", + 14141: "vcs-app", + 14142: "icpp", + 14145: "gcm-app", + 14149: "vrts-tdd", + 14154: "vad", + 14250: "cps", + 14414: "ca-web-update", + 14936: "hde-lcesrvr-1", + 14937: "hde-lcesrvr-2", + 15000: "hydap", + 15118: "v2g-secc", + 15345: "xpilot", + 15363: "3link", + 15555: "cisco-snat", + 15660: "bex-xr", + 15740: "ptp", + 15998: "2ping", + 16003: "alfin", + 16161: "sun-sea-port", + 16309: "etb4j", + 16310: "pduncs", + 16311: "pdefmns", + 16360: "netserialext1", + 16361: "netserialext2", + 16367: "netserialext3", + 16368: "netserialext4", + 16384: "connected", + 16666: "vtp", + 16900: "newbay-snc-mc", + 16950: "sgcip", + 16991: "intel-rci-mp", + 16992: "amt-soap-http", + 16993: "amt-soap-https", + 16994: "amt-redir-tcp", + 16995: "amt-redir-tls", + 17007: "isode-dua", + 17185: "soundsvirtual", + 17219: "chipper", + 17220: "avtp", + 17221: "avdecc", + 17222: "cpsp", + 17224: "trdp-pd", + 17225: "trdp-md", + 17234: "integrius-stp", + 17235: "ssh-mgmt", + 17500: "db-lsp-disc", + 17729: "ea", + 17754: "zep", + 17755: "zigbee-ip", + 17756: "zigbee-ips", + 18000: "biimenu", + 18181: "opsec-cvp", + 18182: "opsec-ufp", + 18183: "opsec-sam", + 18184: "opsec-lea", + 18185: "opsec-omi", + 18186: "ohsc", + 18187: "opsec-ela", + 18241: "checkpoint-rtm", + 18262: "gv-pf", + 18463: "ac-cluster", + 18634: "rds-ib", + 18635: "rds-ip", + 18668: "vdmmesh-disc", + 18769: "ique", + 18881: "infotos", + 18888: "apc-necmp", + 19000: "igrid", + 19007: "scintilla", + 19191: "opsec-uaa", + 19194: "ua-secureagent", + 19220: "cora-disc", + 19283: "keysrvr", + 19315: "keyshadow", + 19398: "mtrgtrans", + 19410: "hp-sco", + 19411: "hp-sca", + 19412: "hp-sessmon", + 19539: "fxuptp", + 19540: "sxuptp", + 19541: "jcp", + 19788: "mle", + 19999: "dnp-sec", + 20000: "dnp", + 20001: "microsan", + 20002: "commtact-http", + 20003: "commtact-https", + 20005: "openwebnet", + 20012: "ss-idi-disc", + 20014: "opendeploy", + 20034: "nburn-id", + 20046: "tmophl7mts", + 20048: "mountd", + 20049: "nfsrdma", + 20167: "tolfab", + 20202: "ipdtp-port", + 20222: "ipulse-ics", + 20480: "emwavemsg", + 20670: "track", + 20999: "athand-mmp", + 21000: "irtrans", + 21554: "dfserver", + 21590: "vofr-gateway", + 21800: "tvpm", + 21845: "webphone", + 21846: "netspeak-is", + 21847: "netspeak-cs", + 21848: "netspeak-acd", + 21849: "netspeak-cps", + 22000: "snapenetio", + 22001: "optocontrol", + 22002: "optohost002", + 22003: "optohost003", + 22004: "optohost004", + 22005: "optohost004", + 22273: "wnn6", + 22305: "cis", + 22335: "shrewd-stream", + 22343: "cis-secure", + 22347: "wibukey", + 22350: "codemeter", + 22555: "vocaltec-phone", + 22763: "talikaserver", + 22800: "aws-brf", + 22951: "brf-gw", + 23000: "inovaport1", + 23001: "inovaport2", + 23002: "inovaport3", + 23003: "inovaport4", + 23004: "inovaport5", + 23005: "inovaport6", + 23272: "s102", + 23294: "5afe-disc", + 23333: "elxmgmt", + 23400: "novar-dbase", + 23401: "novar-alarm", + 23402: "novar-global", + 24000: "med-ltp", + 24001: "med-fsp-rx", + 24002: "med-fsp-tx", + 24003: "med-supp", + 24004: "med-ovw", + 24005: "med-ci", + 24006: "med-net-svc", + 24242: "filesphere", + 24249: "vista-4gl", + 24321: "ild", + 24322: "hid", + 24386: "intel-rci", + 24465: "tonidods", + 24554: "binkp", + 24577: "bilobit-update", + 24676: "canditv", + 24677: "flashfiler", + 24678: "proactivate", + 24680: "tcc-http", + 24850: "assoc-disc", + 24922: "find", + 25000: "icl-twobase1", + 25001: "icl-twobase2", + 25002: "icl-twobase3", + 25003: "icl-twobase4", + 25004: "icl-twobase5", + 25005: "icl-twobase6", + 25006: "icl-twobase7", + 25007: "icl-twobase8", + 25008: "icl-twobase9", + 25009: "icl-twobase10", + 25793: "vocaltec-hos", + 25900: "tasp-net", + 25901: "niobserver", + 25902: "nilinkanalyst", + 25903: "niprobe", + 25954: "bf-game", + 25955: "bf-master", + 26000: "quake", + 26133: "scscp", + 26208: "wnn6-ds", + 26260: "ezproxy", + 26261: "ezmeeting", + 26262: "k3software-svr", + 26263: "k3software-cli", + 26486: "exoline-udp", + 26487: "exoconfig", + 26489: "exonet", + 27345: "imagepump", + 27442: "jesmsjc", + 27504: "kopek-httphead", + 27782: "ars-vista", + 27999: "tw-auth-key", + 28000: "nxlmd", + 28119: "a27-ran-ran", + 28200: "voxelstorm", + 28240: "siemensgsm", + 29167: "otmp", + 30001: "pago-services1", + 30002: "pago-services2", + 30003: "amicon-fpsu-ra", + 30004: "amicon-fpsu-s", + 30260: "kingdomsonline", + 30832: "samsung-disc", + 30999: "ovobs", + 31016: "ka-kdp", + 31029: "yawn", + 31416: "xqosd", + 31457: "tetrinet", + 31620: "lm-mon", + 31765: "gamesmith-port", + 31948: "iceedcp-tx", + 31949: "iceedcp-rx", + 32034: "iracinghelper", + 32249: "t1distproc60", + 32483: "apm-link", + 32635: "sec-ntb-clnt", + 32636: "DMExpress", + 32767: "filenet-powsrm", + 32768: "filenet-tms", + 32769: "filenet-rpc", + 32770: "filenet-nch", + 32771: "filenet-rmi", + 32772: "filenet-pa", + 32773: "filenet-cm", + 32774: "filenet-re", + 32775: "filenet-pch", + 32776: "filenet-peior", + 32777: "filenet-obrok", + 32801: "mlsn", + 32896: "idmgratm", + 33123: "aurora-balaena", + 33331: "diamondport", + 33334: "speedtrace-disc", + 33434: "traceroute", + 33656: "snip-slave", + 34249: "turbonote-2", + 34378: "p-net-local", + 34379: "p-net-remote", + 34567: "edi_service", + 34962: "profinet-rt", + 34963: "profinet-rtm", + 34964: "profinet-cm", + 34980: "ethercat", + 35001: "rt-viewer", + 35004: "rt-classmanager", + 35100: "axio-disc", + 35355: "altova-lm-disc", + 36001: "allpeers", + 36411: "wlcp", + 36865: "kastenxpipe", + 37475: "neckar", + 37654: "unisys-eportal", + 38002: "crescoctrl-disc", + 38201: "galaxy7-data", + 38202: "fairview", + 38203: "agpolicy", + 39681: "turbonote-1", + 40000: "safetynetp", + 40023: "k-patentssensor", + 40841: "cscp", + 40842: "csccredir", + 40843: "csccfirewall", + 40853: "ortec-disc", + 41111: "fs-qos", + 41230: "z-wave-s", + 41794: "crestron-cip", + 41795: "crestron-ctp", + 42508: "candp", + 42509: "candrp", + 42510: "caerpc", + 43000: "recvr-rc-disc", + 43188: "reachout", + 43189: "ndm-agent-port", + 43190: "ip-provision", + 43210: "shaperai-disc", + 43439: "eq3-config", + 43440: "ew-disc-cmd", + 43441: "ciscocsdb", + 44321: "pmcd", + 44322: "pmcdproxy", + 44544: "domiq", + 44553: "rbr-debug", + 44600: "asihpi", + 44818: "EtherNet-IP-2", + 44900: "m3da-disc", + 45000: "asmp-mon", + 45054: "invision-ag", + 45514: "cloudcheck-ping", + 45678: "eba", + 45825: "qdb2service", + 45966: "ssr-servermgr", + 46999: "mediabox", + 47000: "mbus", + 47100: "jvl-mactalk", + 47557: "dbbrowse", + 47624: "directplaysrvr", + 47806: "ap", + 47808: "bacnet", + 47809: "presonus-ucnet", + 48000: "nimcontroller", + 48001: "nimspooler", + 48002: "nimhub", + 48003: "nimgtw", + 48128: "isnetserv", + 48129: "blp5", + 48556: "com-bardac-dw", + 48619: "iqobject", + 48653: "robotraconteur", + 49001: "nusdp-disc", +} +var sctpPortNames = map[SCTPPort]string{ + 9: "discard", + 20: "ftp-data", + 21: "ftp", + 22: "ssh", + 80: "http", + 179: "bgp", + 443: "https", + 1021: "exp1", + 1022: "exp2", + 1167: "cisco-ipsla", + 1720: "h323hostcall", + 2049: "nfs", + 2225: "rcip-itu", + 2904: "m2ua", + 2905: "m3ua", + 2944: "megaco-h248", + 2945: "h248-binary", + 3097: "itu-bicc-stc", + 3565: "m2pa", + 3863: "asap-sctp", + 3864: "asap-sctp-tls", + 3868: "diameter", + 4333: "ahsp", + 4502: "a25-fap-fgw", + 4711: "trinity-dist", + 4739: "ipfix", + 4740: "ipfixs", + 5060: "sip", + 5061: "sips", + 5090: "car", + 5091: "cxtp", + 5215: "noteza", + 5445: "smbdirect", + 5672: "amqp", + 5675: "v5ua", + 5868: "diameters", + 5910: "cm", + 5911: "cpdlc", + 5912: "fis", + 5913: "ads-c", + 6704: "frc-hp", + 6705: "frc-mp", + 6706: "frc-lp", + 6970: "conductor-mpx", + 7626: "simco", + 7701: "nfapi", + 7728: "osvr", + 8471: "pim-port", + 9082: "lcs-ap", + 9084: "aurora", + 9900: "iua", + 9901: "enrp-sctp", + 9902: "enrp-sctp-tls", + 11997: "wmereceiving", + 11998: "wmedistribution", + 11999: "wmereporting", + 14001: "sua", + 20049: "nfsrdma", + 25471: "rna", + 29118: "sgsap", + 29168: "sbcap", + 29169: "iuhsctpassoc", + 30100: "rwp", + 36412: "s1-control", + 36422: "x2-control", + 36423: "slmap", + 36424: "nq-ap", + 36443: "m2ap", + 36444: "m3ap", + 36462: "xw-control", + 38412: "ng-control", + 38422: "xn-control", + 38472: "f1-control", +} diff --git a/backend/vendor/github.com/google/gopacket/layers/icmp4.go b/backend/vendor/github.com/google/gopacket/layers/icmp4.go new file mode 100644 index 0000000..bd3f03f --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/icmp4.go @@ -0,0 +1,267 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// Copyright 2009-2011 Andreas Krennmair. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + "reflect" + + "github.com/google/gopacket" +) + +const ( + ICMPv4TypeEchoReply = 0 + ICMPv4TypeDestinationUnreachable = 3 + ICMPv4TypeSourceQuench = 4 + ICMPv4TypeRedirect = 5 + ICMPv4TypeEchoRequest = 8 + ICMPv4TypeRouterAdvertisement = 9 + ICMPv4TypeRouterSolicitation = 10 + ICMPv4TypeTimeExceeded = 11 + ICMPv4TypeParameterProblem = 12 + ICMPv4TypeTimestampRequest = 13 + ICMPv4TypeTimestampReply = 14 + ICMPv4TypeInfoRequest = 15 + ICMPv4TypeInfoReply = 16 + ICMPv4TypeAddressMaskRequest = 17 + ICMPv4TypeAddressMaskReply = 18 +) + +const ( + // DestinationUnreachable + ICMPv4CodeNet = 0 + ICMPv4CodeHost = 1 + ICMPv4CodeProtocol = 2 + ICMPv4CodePort = 3 + ICMPv4CodeFragmentationNeeded = 4 + ICMPv4CodeSourceRoutingFailed = 5 + ICMPv4CodeNetUnknown = 6 + ICMPv4CodeHostUnknown = 7 + ICMPv4CodeSourceIsolated = 8 + ICMPv4CodeNetAdminProhibited = 9 + ICMPv4CodeHostAdminProhibited = 10 + ICMPv4CodeNetTOS = 11 + ICMPv4CodeHostTOS = 12 + ICMPv4CodeCommAdminProhibited = 13 + ICMPv4CodeHostPrecedence = 14 + ICMPv4CodePrecedenceCutoff = 15 + + // TimeExceeded + ICMPv4CodeTTLExceeded = 0 + ICMPv4CodeFragmentReassemblyTimeExceeded = 1 + + // ParameterProblem + ICMPv4CodePointerIndicatesError = 0 + ICMPv4CodeMissingOption = 1 + ICMPv4CodeBadLength = 2 + + // Redirect + // ICMPv4CodeNet = same as for DestinationUnreachable + // ICMPv4CodeHost = same as for DestinationUnreachable + ICMPv4CodeTOSNet = 2 + ICMPv4CodeTOSHost = 3 +) + +type icmpv4TypeCodeInfoStruct struct { + typeStr string + codeStr *map[uint8]string +} + +var ( + icmpv4TypeCodeInfo = map[uint8]icmpv4TypeCodeInfoStruct{ + ICMPv4TypeDestinationUnreachable: icmpv4TypeCodeInfoStruct{ + "DestinationUnreachable", &map[uint8]string{ + ICMPv4CodeNet: "Net", + ICMPv4CodeHost: "Host", + ICMPv4CodeProtocol: "Protocol", + ICMPv4CodePort: "Port", + ICMPv4CodeFragmentationNeeded: "FragmentationNeeded", + ICMPv4CodeSourceRoutingFailed: "SourceRoutingFailed", + ICMPv4CodeNetUnknown: "NetUnknown", + ICMPv4CodeHostUnknown: "HostUnknown", + ICMPv4CodeSourceIsolated: "SourceIsolated", + ICMPv4CodeNetAdminProhibited: "NetAdminProhibited", + ICMPv4CodeHostAdminProhibited: "HostAdminProhibited", + ICMPv4CodeNetTOS: "NetTOS", + ICMPv4CodeHostTOS: "HostTOS", + ICMPv4CodeCommAdminProhibited: "CommAdminProhibited", + ICMPv4CodeHostPrecedence: "HostPrecedence", + ICMPv4CodePrecedenceCutoff: "PrecedenceCutoff", + }, + }, + ICMPv4TypeTimeExceeded: icmpv4TypeCodeInfoStruct{ + "TimeExceeded", &map[uint8]string{ + ICMPv4CodeTTLExceeded: "TTLExceeded", + ICMPv4CodeFragmentReassemblyTimeExceeded: "FragmentReassemblyTimeExceeded", + }, + }, + ICMPv4TypeParameterProblem: icmpv4TypeCodeInfoStruct{ + "ParameterProblem", &map[uint8]string{ + ICMPv4CodePointerIndicatesError: "PointerIndicatesError", + ICMPv4CodeMissingOption: "MissingOption", + ICMPv4CodeBadLength: "BadLength", + }, + }, + ICMPv4TypeSourceQuench: icmpv4TypeCodeInfoStruct{ + "SourceQuench", nil, + }, + ICMPv4TypeRedirect: icmpv4TypeCodeInfoStruct{ + "Redirect", &map[uint8]string{ + ICMPv4CodeNet: "Net", + ICMPv4CodeHost: "Host", + ICMPv4CodeTOSNet: "TOS+Net", + ICMPv4CodeTOSHost: "TOS+Host", + }, + }, + ICMPv4TypeEchoRequest: icmpv4TypeCodeInfoStruct{ + "EchoRequest", nil, + }, + ICMPv4TypeEchoReply: icmpv4TypeCodeInfoStruct{ + "EchoReply", nil, + }, + ICMPv4TypeTimestampRequest: icmpv4TypeCodeInfoStruct{ + "TimestampRequest", nil, + }, + ICMPv4TypeTimestampReply: icmpv4TypeCodeInfoStruct{ + "TimestampReply", nil, + }, + ICMPv4TypeInfoRequest: icmpv4TypeCodeInfoStruct{ + "InfoRequest", nil, + }, + ICMPv4TypeInfoReply: icmpv4TypeCodeInfoStruct{ + "InfoReply", nil, + }, + ICMPv4TypeRouterSolicitation: icmpv4TypeCodeInfoStruct{ + "RouterSolicitation", nil, + }, + ICMPv4TypeRouterAdvertisement: icmpv4TypeCodeInfoStruct{ + "RouterAdvertisement", nil, + }, + ICMPv4TypeAddressMaskRequest: icmpv4TypeCodeInfoStruct{ + "AddressMaskRequest", nil, + }, + ICMPv4TypeAddressMaskReply: icmpv4TypeCodeInfoStruct{ + "AddressMaskReply", nil, + }, + } +) + +type ICMPv4TypeCode uint16 + +// Type returns the ICMPv4 type field. +func (a ICMPv4TypeCode) Type() uint8 { + return uint8(a >> 8) +} + +// Code returns the ICMPv4 code field. +func (a ICMPv4TypeCode) Code() uint8 { + return uint8(a) +} + +func (a ICMPv4TypeCode) String() string { + t, c := a.Type(), a.Code() + strInfo, ok := icmpv4TypeCodeInfo[t] + if !ok { + // Unknown ICMPv4 type field + return fmt.Sprintf("%d(%d)", t, c) + } + typeStr := strInfo.typeStr + if strInfo.codeStr == nil && c == 0 { + // The ICMPv4 type does not make use of the code field + return fmt.Sprintf("%s", strInfo.typeStr) + } + if strInfo.codeStr == nil && c != 0 { + // The ICMPv4 type does not make use of the code field, but it is present anyway + return fmt.Sprintf("%s(Code: %d)", typeStr, c) + } + codeStr, ok := (*strInfo.codeStr)[c] + if !ok { + // We don't know this ICMPv4 code; print the numerical value + return fmt.Sprintf("%s(Code: %d)", typeStr, c) + } + return fmt.Sprintf("%s(%s)", typeStr, codeStr) +} + +func (a ICMPv4TypeCode) GoString() string { + t := reflect.TypeOf(a) + return fmt.Sprintf("%s(%d, %d)", t.String(), a.Type(), a.Code()) +} + +// SerializeTo writes the ICMPv4TypeCode value to the 'bytes' buffer. +func (a ICMPv4TypeCode) SerializeTo(bytes []byte) { + binary.BigEndian.PutUint16(bytes, uint16(a)) +} + +// CreateICMPv4TypeCode is a convenience function to create an ICMPv4TypeCode +// gopacket type from the ICMPv4 type and code values. +func CreateICMPv4TypeCode(typ uint8, code uint8) ICMPv4TypeCode { + return ICMPv4TypeCode(binary.BigEndian.Uint16([]byte{typ, code})) +} + +// ICMPv4 is the layer for IPv4 ICMP packet data. +type ICMPv4 struct { + BaseLayer + TypeCode ICMPv4TypeCode + Checksum uint16 + Id uint16 + Seq uint16 +} + +// LayerType returns LayerTypeICMPv4. +func (i *ICMPv4) LayerType() gopacket.LayerType { return LayerTypeICMPv4 } + +// DecodeFromBytes decodes the given bytes into this layer. +func (i *ICMPv4) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 8 { + df.SetTruncated() + return errors.New("ICMP layer less then 8 bytes for ICMPv4 packet") + } + i.TypeCode = CreateICMPv4TypeCode(data[0], data[1]) + i.Checksum = binary.BigEndian.Uint16(data[2:4]) + i.Id = binary.BigEndian.Uint16(data[4:6]) + i.Seq = binary.BigEndian.Uint16(data[6:8]) + i.BaseLayer = BaseLayer{data[:8], data[8:]} + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (i *ICMPv4) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + bytes, err := b.PrependBytes(8) + if err != nil { + return err + } + i.TypeCode.SerializeTo(bytes) + binary.BigEndian.PutUint16(bytes[4:], i.Id) + binary.BigEndian.PutUint16(bytes[6:], i.Seq) + if opts.ComputeChecksums { + bytes[2] = 0 + bytes[3] = 0 + i.Checksum = tcpipChecksum(b.Bytes(), 0) + } + binary.BigEndian.PutUint16(bytes[2:], i.Checksum) + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (i *ICMPv4) CanDecode() gopacket.LayerClass { + return LayerTypeICMPv4 +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (i *ICMPv4) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +func decodeICMPv4(data []byte, p gopacket.PacketBuilder) error { + i := &ICMPv4{} + return decodingLayerDecoder(i, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/icmp6.go b/backend/vendor/github.com/google/gopacket/layers/icmp6.go new file mode 100644 index 0000000..09afd11 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/icmp6.go @@ -0,0 +1,266 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// Copyright 2009-2011 Andreas Krennmair. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + "reflect" + + "github.com/google/gopacket" +) + +const ( + // The following are from RFC 4443 + ICMPv6TypeDestinationUnreachable = 1 + ICMPv6TypePacketTooBig = 2 + ICMPv6TypeTimeExceeded = 3 + ICMPv6TypeParameterProblem = 4 + ICMPv6TypeEchoRequest = 128 + ICMPv6TypeEchoReply = 129 + + // The following are from RFC 4861 + ICMPv6TypeRouterSolicitation = 133 + ICMPv6TypeRouterAdvertisement = 134 + ICMPv6TypeNeighborSolicitation = 135 + ICMPv6TypeNeighborAdvertisement = 136 + ICMPv6TypeRedirect = 137 + + // The following are from RFC 2710 + ICMPv6TypeMLDv1MulticastListenerQueryMessage = 130 + ICMPv6TypeMLDv1MulticastListenerReportMessage = 131 + ICMPv6TypeMLDv1MulticastListenerDoneMessage = 132 + + // The following are from RFC 3810 + ICMPv6TypeMLDv2MulticastListenerReportMessageV2 = 143 +) + +const ( + // DestinationUnreachable + ICMPv6CodeNoRouteToDst = 0 + ICMPv6CodeAdminProhibited = 1 + ICMPv6CodeBeyondScopeOfSrc = 2 + ICMPv6CodeAddressUnreachable = 3 + ICMPv6CodePortUnreachable = 4 + ICMPv6CodeSrcAddressFailedPolicy = 5 + ICMPv6CodeRejectRouteToDst = 6 + + // TimeExceeded + ICMPv6CodeHopLimitExceeded = 0 + ICMPv6CodeFragmentReassemblyTimeExceeded = 1 + + // ParameterProblem + ICMPv6CodeErroneousHeaderField = 0 + ICMPv6CodeUnrecognizedNextHeader = 1 + ICMPv6CodeUnrecognizedIPv6Option = 2 +) + +type icmpv6TypeCodeInfoStruct struct { + typeStr string + codeStr *map[uint8]string +} + +var ( + icmpv6TypeCodeInfo = map[uint8]icmpv6TypeCodeInfoStruct{ + ICMPv6TypeDestinationUnreachable: icmpv6TypeCodeInfoStruct{ + "DestinationUnreachable", &map[uint8]string{ + ICMPv6CodeNoRouteToDst: "NoRouteToDst", + ICMPv6CodeAdminProhibited: "AdminProhibited", + ICMPv6CodeBeyondScopeOfSrc: "BeyondScopeOfSrc", + ICMPv6CodeAddressUnreachable: "AddressUnreachable", + ICMPv6CodePortUnreachable: "PortUnreachable", + ICMPv6CodeSrcAddressFailedPolicy: "SrcAddressFailedPolicy", + ICMPv6CodeRejectRouteToDst: "RejectRouteToDst", + }, + }, + ICMPv6TypePacketTooBig: icmpv6TypeCodeInfoStruct{ + "PacketTooBig", nil, + }, + ICMPv6TypeTimeExceeded: icmpv6TypeCodeInfoStruct{ + "TimeExceeded", &map[uint8]string{ + ICMPv6CodeHopLimitExceeded: "HopLimitExceeded", + ICMPv6CodeFragmentReassemblyTimeExceeded: "FragmentReassemblyTimeExceeded", + }, + }, + ICMPv6TypeParameterProblem: icmpv6TypeCodeInfoStruct{ + "ParameterProblem", &map[uint8]string{ + ICMPv6CodeErroneousHeaderField: "ErroneousHeaderField", + ICMPv6CodeUnrecognizedNextHeader: "UnrecognizedNextHeader", + ICMPv6CodeUnrecognizedIPv6Option: "UnrecognizedIPv6Option", + }, + }, + ICMPv6TypeEchoRequest: icmpv6TypeCodeInfoStruct{ + "EchoRequest", nil, + }, + ICMPv6TypeEchoReply: icmpv6TypeCodeInfoStruct{ + "EchoReply", nil, + }, + ICMPv6TypeRouterSolicitation: icmpv6TypeCodeInfoStruct{ + "RouterSolicitation", nil, + }, + ICMPv6TypeRouterAdvertisement: icmpv6TypeCodeInfoStruct{ + "RouterAdvertisement", nil, + }, + ICMPv6TypeNeighborSolicitation: icmpv6TypeCodeInfoStruct{ + "NeighborSolicitation", nil, + }, + ICMPv6TypeNeighborAdvertisement: icmpv6TypeCodeInfoStruct{ + "NeighborAdvertisement", nil, + }, + ICMPv6TypeRedirect: icmpv6TypeCodeInfoStruct{ + "Redirect", nil, + }, + } +) + +type ICMPv6TypeCode uint16 + +// Type returns the ICMPv6 type field. +func (a ICMPv6TypeCode) Type() uint8 { + return uint8(a >> 8) +} + +// Code returns the ICMPv6 code field. +func (a ICMPv6TypeCode) Code() uint8 { + return uint8(a) +} + +func (a ICMPv6TypeCode) String() string { + t, c := a.Type(), a.Code() + strInfo, ok := icmpv6TypeCodeInfo[t] + if !ok { + // Unknown ICMPv6 type field + return fmt.Sprintf("%d(%d)", t, c) + } + typeStr := strInfo.typeStr + if strInfo.codeStr == nil && c == 0 { + // The ICMPv6 type does not make use of the code field + return fmt.Sprintf("%s", strInfo.typeStr) + } + if strInfo.codeStr == nil && c != 0 { + // The ICMPv6 type does not make use of the code field, but it is present anyway + return fmt.Sprintf("%s(Code: %d)", typeStr, c) + } + codeStr, ok := (*strInfo.codeStr)[c] + if !ok { + // We don't know this ICMPv6 code; print the numerical value + return fmt.Sprintf("%s(Code: %d)", typeStr, c) + } + return fmt.Sprintf("%s(%s)", typeStr, codeStr) +} + +func (a ICMPv6TypeCode) GoString() string { + t := reflect.TypeOf(a) + return fmt.Sprintf("%s(%d, %d)", t.String(), a.Type(), a.Code()) +} + +// SerializeTo writes the ICMPv6TypeCode value to the 'bytes' buffer. +func (a ICMPv6TypeCode) SerializeTo(bytes []byte) { + binary.BigEndian.PutUint16(bytes, uint16(a)) +} + +// CreateICMPv6TypeCode is a convenience function to create an ICMPv6TypeCode +// gopacket type from the ICMPv6 type and code values. +func CreateICMPv6TypeCode(typ uint8, code uint8) ICMPv6TypeCode { + return ICMPv6TypeCode(binary.BigEndian.Uint16([]byte{typ, code})) +} + +// ICMPv6 is the layer for IPv6 ICMP packet data +type ICMPv6 struct { + BaseLayer + TypeCode ICMPv6TypeCode + Checksum uint16 + // TypeBytes is deprecated and always nil. See the different ICMPv6 message types + // instead (e.g. ICMPv6TypeRouterSolicitation). + TypeBytes []byte + tcpipchecksum +} + +// LayerType returns LayerTypeICMPv6. +func (i *ICMPv6) LayerType() gopacket.LayerType { return LayerTypeICMPv6 } + +// DecodeFromBytes decodes the given bytes into this layer. +func (i *ICMPv6) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 4 { + df.SetTruncated() + return errors.New("ICMP layer less then 4 bytes for ICMPv6 packet") + } + i.TypeCode = CreateICMPv6TypeCode(data[0], data[1]) + i.Checksum = binary.BigEndian.Uint16(data[2:4]) + i.BaseLayer = BaseLayer{data[:4], data[4:]} + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (i *ICMPv6) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + bytes, err := b.PrependBytes(4) + if err != nil { + return err + } + i.TypeCode.SerializeTo(bytes) + + if opts.ComputeChecksums { + bytes[2] = 0 + bytes[3] = 0 + csum, err := i.computeChecksum(b.Bytes(), IPProtocolICMPv6) + if err != nil { + return err + } + i.Checksum = csum + } + binary.BigEndian.PutUint16(bytes[2:], i.Checksum) + + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (i *ICMPv6) CanDecode() gopacket.LayerClass { + return LayerTypeICMPv6 +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (i *ICMPv6) NextLayerType() gopacket.LayerType { + switch i.TypeCode.Type() { + case ICMPv6TypeEchoRequest: + return LayerTypeICMPv6Echo + case ICMPv6TypeEchoReply: + return LayerTypeICMPv6Echo + case ICMPv6TypeRouterSolicitation: + return LayerTypeICMPv6RouterSolicitation + case ICMPv6TypeRouterAdvertisement: + return LayerTypeICMPv6RouterAdvertisement + case ICMPv6TypeNeighborSolicitation: + return LayerTypeICMPv6NeighborSolicitation + case ICMPv6TypeNeighborAdvertisement: + return LayerTypeICMPv6NeighborAdvertisement + case ICMPv6TypeRedirect: + return LayerTypeICMPv6Redirect + case ICMPv6TypeMLDv1MulticastListenerQueryMessage: // Same Code for MLDv1 Query and MLDv2 Query + if len(i.Payload) > 20 { // Only payload size differs + return LayerTypeMLDv2MulticastListenerQuery + } else { + return LayerTypeMLDv1MulticastListenerQuery + } + case ICMPv6TypeMLDv1MulticastListenerDoneMessage: + return LayerTypeMLDv1MulticastListenerDone + case ICMPv6TypeMLDv1MulticastListenerReportMessage: + return LayerTypeMLDv1MulticastListenerReport + case ICMPv6TypeMLDv2MulticastListenerReportMessageV2: + return LayerTypeMLDv2MulticastListenerReport + } + + return gopacket.LayerTypePayload +} + +func decodeICMPv6(data []byte, p gopacket.PacketBuilder) error { + i := &ICMPv6{} + return decodingLayerDecoder(i, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/icmp6msg.go b/backend/vendor/github.com/google/gopacket/layers/icmp6msg.go new file mode 100644 index 0000000..d9268db --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/icmp6msg.go @@ -0,0 +1,578 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// Copyright 2009-2011 Andreas Krennmair. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "encoding/hex" + "errors" + "fmt" + "net" + "time" + + "github.com/google/gopacket" +) + +// Based on RFC 4861 + +// ICMPv6Opt indicate how to decode the data associated with each ICMPv6Option. +type ICMPv6Opt uint8 + +const ( + _ ICMPv6Opt = iota + + // ICMPv6OptSourceAddress contains the link-layer address of the sender of + // the packet. It is used in the Neighbor Solicitation, Router + // Solicitation, and Router Advertisement packets. Must be ignored for other + // Neighbor discovery messages. + ICMPv6OptSourceAddress + + // ICMPv6OptTargetAddress contains the link-layer address of the target. It + // is used in Neighbor Advertisement and Redirect packets. Must be ignored + // for other Neighbor discovery messages. + ICMPv6OptTargetAddress + + // ICMPv6OptPrefixInfo provides hosts with on-link prefixes and prefixes + // for Address Autoconfiguration. The Prefix Information option appears in + // Router Advertisement packets and MUST be silently ignored for other + // messages. + ICMPv6OptPrefixInfo + + // ICMPv6OptRedirectedHeader is used in Redirect messages and contains all + // or part of the packet that is being redirected. + ICMPv6OptRedirectedHeader + + // ICMPv6OptMTU is used in Router Advertisement messages to ensure that all + // nodes on a link use the same MTU value in those cases where the link MTU + // is not well known. This option MUST be silently ignored for other + // Neighbor Discovery messages. + ICMPv6OptMTU +) + +// ICMPv6Echo represents the structure of a ping. +type ICMPv6Echo struct { + BaseLayer + Identifier uint16 + SeqNumber uint16 +} + +// ICMPv6RouterSolicitation is sent by hosts to find routers. +type ICMPv6RouterSolicitation struct { + BaseLayer + Options ICMPv6Options +} + +// ICMPv6RouterAdvertisement is sent by routers in response to Solicitation. +type ICMPv6RouterAdvertisement struct { + BaseLayer + HopLimit uint8 + Flags uint8 + RouterLifetime uint16 + ReachableTime uint32 + RetransTimer uint32 + Options ICMPv6Options +} + +// ICMPv6NeighborSolicitation is sent to request the link-layer address of a +// target node. +type ICMPv6NeighborSolicitation struct { + BaseLayer + TargetAddress net.IP + Options ICMPv6Options +} + +// ICMPv6NeighborAdvertisement is sent by nodes in response to Solicitation. +type ICMPv6NeighborAdvertisement struct { + BaseLayer + Flags uint8 + TargetAddress net.IP + Options ICMPv6Options +} + +// ICMPv6Redirect is sent by routers to inform hosts of a better first-hop node +// on the path to a destination. +type ICMPv6Redirect struct { + BaseLayer + TargetAddress net.IP + DestinationAddress net.IP + Options ICMPv6Options +} + +// ICMPv6Option contains the type and data for a single option. +type ICMPv6Option struct { + Type ICMPv6Opt + Data []byte +} + +// ICMPv6Options is a slice of ICMPv6Option. +type ICMPv6Options []ICMPv6Option + +func (i ICMPv6Opt) String() string { + switch i { + case ICMPv6OptSourceAddress: + return "SourceAddress" + case ICMPv6OptTargetAddress: + return "TargetAddress" + case ICMPv6OptPrefixInfo: + return "PrefixInfo" + case ICMPv6OptRedirectedHeader: + return "RedirectedHeader" + case ICMPv6OptMTU: + return "MTU" + default: + return fmt.Sprintf("Unknown(%d)", i) + } +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (i *ICMPv6Echo) CanDecode() gopacket.LayerClass { + return LayerTypeICMPv6Echo +} + +// LayerType returns LayerTypeICMPv6Echo. +func (i *ICMPv6Echo) LayerType() gopacket.LayerType { + return LayerTypeICMPv6Echo +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (i *ICMPv6Echo) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +// DecodeFromBytes decodes the given bytes into this layer. +func (i *ICMPv6Echo) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 4 { + df.SetTruncated() + return errors.New("ICMP layer less then 4 bytes for ICMPv6 Echo") + } + i.Identifier = binary.BigEndian.Uint16(data[0:2]) + i.SeqNumber = binary.BigEndian.Uint16(data[2:4]) + + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (i *ICMPv6Echo) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + buf, err := b.PrependBytes(4) + if err != nil { + return err + } + + binary.BigEndian.PutUint16(buf, i.Identifier) + binary.BigEndian.PutUint16(buf[2:], i.SeqNumber) + return nil +} + +// LayerType returns LayerTypeICMPv6. +func (i *ICMPv6RouterSolicitation) LayerType() gopacket.LayerType { + return LayerTypeICMPv6RouterSolicitation +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (i *ICMPv6RouterSolicitation) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +// DecodeFromBytes decodes the given bytes into this layer. +func (i *ICMPv6RouterSolicitation) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + // first 4 bytes are reserved followed by options + if len(data) < 4 { + df.SetTruncated() + return errors.New("ICMP layer less then 4 bytes for ICMPv6 router solicitation") + } + + // truncate old options + i.Options = i.Options[:0] + + return i.Options.DecodeFromBytes(data[4:], df) +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (i *ICMPv6RouterSolicitation) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + if err := i.Options.SerializeTo(b, opts); err != nil { + return err + } + + buf, err := b.PrependBytes(4) + if err != nil { + return err + } + + copy(buf, lotsOfZeros[:4]) + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (i *ICMPv6RouterSolicitation) CanDecode() gopacket.LayerClass { + return LayerTypeICMPv6RouterSolicitation +} + +// LayerType returns LayerTypeICMPv6RouterAdvertisement. +func (i *ICMPv6RouterAdvertisement) LayerType() gopacket.LayerType { + return LayerTypeICMPv6RouterAdvertisement +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (i *ICMPv6RouterAdvertisement) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +// DecodeFromBytes decodes the given bytes into this layer. +func (i *ICMPv6RouterAdvertisement) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 12 { + df.SetTruncated() + return errors.New("ICMP layer less then 12 bytes for ICMPv6 router advertisement") + } + + i.HopLimit = uint8(data[0]) + // M, O bit followed by 6 reserved bits + i.Flags = uint8(data[1]) + i.RouterLifetime = binary.BigEndian.Uint16(data[2:4]) + i.ReachableTime = binary.BigEndian.Uint32(data[4:8]) + i.RetransTimer = binary.BigEndian.Uint32(data[8:12]) + i.BaseLayer = BaseLayer{data, nil} // assume no payload + + // truncate old options + i.Options = i.Options[:0] + + return i.Options.DecodeFromBytes(data[12:], df) +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (i *ICMPv6RouterAdvertisement) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + if err := i.Options.SerializeTo(b, opts); err != nil { + return err + } + + buf, err := b.PrependBytes(12) + if err != nil { + return err + } + + buf[0] = byte(i.HopLimit) + buf[1] = byte(i.Flags) + binary.BigEndian.PutUint16(buf[2:], i.RouterLifetime) + binary.BigEndian.PutUint32(buf[4:], i.ReachableTime) + binary.BigEndian.PutUint32(buf[8:], i.RetransTimer) + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (i *ICMPv6RouterAdvertisement) CanDecode() gopacket.LayerClass { + return LayerTypeICMPv6RouterAdvertisement +} + +// ManagedAddressConfig is true when addresses are available via DHCPv6. If +// set, the OtherConfig flag is redundant. +func (i *ICMPv6RouterAdvertisement) ManagedAddressConfig() bool { + return i.Flags&0x80 != 0 +} + +// OtherConfig is true when there is other configuration information available +// via DHCPv6. For example, DNS-related information. +func (i *ICMPv6RouterAdvertisement) OtherConfig() bool { + return i.Flags&0x40 != 0 +} + +// LayerType returns LayerTypeICMPv6NeighborSolicitation. +func (i *ICMPv6NeighborSolicitation) LayerType() gopacket.LayerType { + return LayerTypeICMPv6NeighborSolicitation +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (i *ICMPv6NeighborSolicitation) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +// DecodeFromBytes decodes the given bytes into this layer. +func (i *ICMPv6NeighborSolicitation) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 20 { + df.SetTruncated() + return errors.New("ICMP layer less then 20 bytes for ICMPv6 neighbor solicitation") + } + + i.TargetAddress = net.IP(data[4:20]) + i.BaseLayer = BaseLayer{data, nil} // assume no payload + + // truncate old options + i.Options = i.Options[:0] + + return i.Options.DecodeFromBytes(data[20:], df) +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (i *ICMPv6NeighborSolicitation) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + if err := i.Options.SerializeTo(b, opts); err != nil { + return err + } + + buf, err := b.PrependBytes(20) + if err != nil { + return err + } + + copy(buf, lotsOfZeros[:4]) + copy(buf[4:], i.TargetAddress) + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (i *ICMPv6NeighborSolicitation) CanDecode() gopacket.LayerClass { + return LayerTypeICMPv6NeighborSolicitation +} + +// LayerType returns LayerTypeICMPv6NeighborAdvertisement. +func (i *ICMPv6NeighborAdvertisement) LayerType() gopacket.LayerType { + return LayerTypeICMPv6NeighborAdvertisement +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (i *ICMPv6NeighborAdvertisement) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +// DecodeFromBytes decodes the given bytes into this layer. +func (i *ICMPv6NeighborAdvertisement) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 20 { + df.SetTruncated() + return errors.New("ICMP layer less then 20 bytes for ICMPv6 neighbor advertisement") + } + + i.Flags = uint8(data[0]) + i.TargetAddress = net.IP(data[4:20]) + i.BaseLayer = BaseLayer{data, nil} // assume no payload + + // truncate old options + i.Options = i.Options[:0] + + return i.Options.DecodeFromBytes(data[20:], df) +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (i *ICMPv6NeighborAdvertisement) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + if err := i.Options.SerializeTo(b, opts); err != nil { + return err + } + + buf, err := b.PrependBytes(20) + if err != nil { + return err + } + + buf[0] = byte(i.Flags) + copy(buf[1:], lotsOfZeros[:3]) + copy(buf[4:], i.TargetAddress) + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (i *ICMPv6NeighborAdvertisement) CanDecode() gopacket.LayerClass { + return LayerTypeICMPv6NeighborAdvertisement +} + +// Router indicates whether the sender is a router or not. +func (i *ICMPv6NeighborAdvertisement) Router() bool { + return i.Flags&0x80 != 0 +} + +// Solicited indicates whether the advertisement was solicited or not. +func (i *ICMPv6NeighborAdvertisement) Solicited() bool { + return i.Flags&0x40 != 0 +} + +// Override indicates whether the advertisement should Override an existing +// cache entry. +func (i *ICMPv6NeighborAdvertisement) Override() bool { + return i.Flags&0x20 != 0 +} + +// LayerType returns LayerTypeICMPv6Redirect. +func (i *ICMPv6Redirect) LayerType() gopacket.LayerType { + return LayerTypeICMPv6Redirect +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (i *ICMPv6Redirect) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +// DecodeFromBytes decodes the given bytes into this layer. +func (i *ICMPv6Redirect) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 36 { + df.SetTruncated() + return errors.New("ICMP layer less then 36 bytes for ICMPv6 redirect") + } + + i.TargetAddress = net.IP(data[4:20]) + i.DestinationAddress = net.IP(data[20:36]) + i.BaseLayer = BaseLayer{data, nil} // assume no payload + + // truncate old options + i.Options = i.Options[:0] + + return i.Options.DecodeFromBytes(data[36:], df) +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (i *ICMPv6Redirect) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + if err := i.Options.SerializeTo(b, opts); err != nil { + return err + } + + buf, err := b.PrependBytes(36) + if err != nil { + return err + } + + copy(buf, lotsOfZeros[:4]) + copy(buf[4:], i.TargetAddress) + copy(buf[20:], i.DestinationAddress) + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (i *ICMPv6Redirect) CanDecode() gopacket.LayerClass { + return LayerTypeICMPv6Redirect +} + +func (i ICMPv6Option) String() string { + hd := hex.EncodeToString(i.Data) + if len(hd) > 0 { + hd = " 0x" + hd + } + + switch i.Type { + case ICMPv6OptSourceAddress, ICMPv6OptTargetAddress: + return fmt.Sprintf("ICMPv6Option(%s:%v)", + i.Type, + net.HardwareAddr(i.Data)) + case ICMPv6OptPrefixInfo: + if len(i.Data) == 30 { + prefixLen := uint8(i.Data[0]) + onLink := (i.Data[1]&0x80 != 0) + autonomous := (i.Data[1]&0x40 != 0) + validLifetime := time.Duration(binary.BigEndian.Uint32(i.Data[2:6])) * time.Second + preferredLifetime := time.Duration(binary.BigEndian.Uint32(i.Data[6:10])) * time.Second + + prefix := net.IP(i.Data[14:]) + + return fmt.Sprintf("ICMPv6Option(%s:%v/%v:%t:%t:%v:%v)", + i.Type, + prefix, prefixLen, + onLink, autonomous, + validLifetime, preferredLifetime) + } + case ICMPv6OptRedirectedHeader: + // could invoke IP decoder on data... probably best not to + break + case ICMPv6OptMTU: + if len(i.Data) == 6 { + return fmt.Sprintf("ICMPv6Option(%s:%v)", + i.Type, + binary.BigEndian.Uint32(i.Data[2:])) + } + + } + return fmt.Sprintf("ICMPv6Option(%s:%s)", i.Type, hd) +} + +// DecodeFromBytes decodes the given bytes into this layer. +func (i *ICMPv6Options) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + for len(data) > 0 { + if len(data) < 2 { + df.SetTruncated() + return errors.New("ICMP layer less then 2 bytes for ICMPv6 message option") + } + + // unit is 8 octets, convert to bytes + length := int(data[1]) * 8 + + if length == 0 { + df.SetTruncated() + return errors.New("ICMPv6 message option with length 0") + } + + if len(data) < length { + df.SetTruncated() + return fmt.Errorf("ICMP layer only %v bytes for ICMPv6 message option with length %v", len(data), length) + } + + o := ICMPv6Option{ + Type: ICMPv6Opt(data[0]), + Data: data[2:length], + } + + // chop off option we just consumed + data = data[length:] + + *i = append(*i, o) + } + + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (i *ICMPv6Options) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + for _, opt := range []ICMPv6Option(*i) { + length := len(opt.Data) + 2 + buf, err := b.PrependBytes(length) + if err != nil { + return err + } + + buf[0] = byte(opt.Type) + buf[1] = byte(length / 8) + copy(buf[2:], opt.Data) + } + + return nil +} + +func decodeICMPv6Echo(data []byte, p gopacket.PacketBuilder) error { + i := &ICMPv6Echo{} + return decodingLayerDecoder(i, data, p) +} + +func decodeICMPv6RouterSolicitation(data []byte, p gopacket.PacketBuilder) error { + i := &ICMPv6RouterSolicitation{} + return decodingLayerDecoder(i, data, p) +} + +func decodeICMPv6RouterAdvertisement(data []byte, p gopacket.PacketBuilder) error { + i := &ICMPv6RouterAdvertisement{} + return decodingLayerDecoder(i, data, p) +} + +func decodeICMPv6NeighborSolicitation(data []byte, p gopacket.PacketBuilder) error { + i := &ICMPv6NeighborSolicitation{} + return decodingLayerDecoder(i, data, p) +} + +func decodeICMPv6NeighborAdvertisement(data []byte, p gopacket.PacketBuilder) error { + i := &ICMPv6NeighborAdvertisement{} + return decodingLayerDecoder(i, data, p) +} + +func decodeICMPv6Redirect(data []byte, p gopacket.PacketBuilder) error { + i := &ICMPv6Redirect{} + return decodingLayerDecoder(i, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/igmp.go b/backend/vendor/github.com/google/gopacket/layers/igmp.go new file mode 100644 index 0000000..d008415 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/igmp.go @@ -0,0 +1,355 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// Copyright 2009-2011 Andreas Krennmair. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "net" + "time" + + "github.com/google/gopacket" +) + +type IGMPType uint8 + +const ( + IGMPMembershipQuery IGMPType = 0x11 // General or group specific query + IGMPMembershipReportV1 IGMPType = 0x12 // Version 1 Membership Report + IGMPMembershipReportV2 IGMPType = 0x16 // Version 2 Membership Report + IGMPLeaveGroup IGMPType = 0x17 // Leave Group + IGMPMembershipReportV3 IGMPType = 0x22 // Version 3 Membership Report +) + +// String conversions for IGMP message types +func (i IGMPType) String() string { + switch i { + case IGMPMembershipQuery: + return "IGMP Membership Query" + case IGMPMembershipReportV1: + return "IGMPv1 Membership Report" + case IGMPMembershipReportV2: + return "IGMPv2 Membership Report" + case IGMPMembershipReportV3: + return "IGMPv3 Membership Report" + case IGMPLeaveGroup: + return "Leave Group" + default: + return "" + } +} + +type IGMPv3GroupRecordType uint8 + +const ( + IGMPIsIn IGMPv3GroupRecordType = 0x01 // Type MODE_IS_INCLUDE, source addresses x + IGMPIsEx IGMPv3GroupRecordType = 0x02 // Type MODE_IS_EXCLUDE, source addresses x + IGMPToIn IGMPv3GroupRecordType = 0x03 // Type CHANGE_TO_INCLUDE_MODE, source addresses x + IGMPToEx IGMPv3GroupRecordType = 0x04 // Type CHANGE_TO_EXCLUDE_MODE, source addresses x + IGMPAllow IGMPv3GroupRecordType = 0x05 // Type ALLOW_NEW_SOURCES, source addresses x + IGMPBlock IGMPv3GroupRecordType = 0x06 // Type BLOCK_OLD_SOURCES, source addresses x +) + +func (i IGMPv3GroupRecordType) String() string { + switch i { + case IGMPIsIn: + return "MODE_IS_INCLUDE" + case IGMPIsEx: + return "MODE_IS_EXCLUDE" + case IGMPToIn: + return "CHANGE_TO_INCLUDE_MODE" + case IGMPToEx: + return "CHANGE_TO_EXCLUDE_MODE" + case IGMPAllow: + return "ALLOW_NEW_SOURCES" + case IGMPBlock: + return "BLOCK_OLD_SOURCES" + default: + return "" + } +} + +// IGMP represents an IGMPv3 message. +type IGMP struct { + BaseLayer + Type IGMPType + MaxResponseTime time.Duration + Checksum uint16 + GroupAddress net.IP + SupressRouterProcessing bool + RobustnessValue uint8 + IntervalTime time.Duration + SourceAddresses []net.IP + NumberOfGroupRecords uint16 + NumberOfSources uint16 + GroupRecords []IGMPv3GroupRecord + Version uint8 // IGMP protocol version +} + +// IGMPv1or2 stores header details for an IGMPv1 or IGMPv2 packet. +// +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type | Max Resp Time | Checksum | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Group Address | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +type IGMPv1or2 struct { + BaseLayer + Type IGMPType // IGMP message type + MaxResponseTime time.Duration // meaningful only in Membership Query messages + Checksum uint16 // 16-bit checksum of entire ip payload + GroupAddress net.IP // either 0 or an IP multicast address + Version uint8 +} + +// decodeResponse dissects IGMPv1 or IGMPv2 packet. +func (i *IGMPv1or2) decodeResponse(data []byte) error { + if len(data) < 8 { + return errors.New("IGMP packet too small") + } + + i.MaxResponseTime = igmpTimeDecode(data[1]) + i.Checksum = binary.BigEndian.Uint16(data[2:4]) + i.GroupAddress = net.IP(data[4:8]) + + return nil +} + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 0x22 | Reserved | Checksum | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Reserved | Number of Group Records (M) | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | | +// . Group Record [1] . +// | | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | | +// . Group Record [2] . +// | | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | | +// . Group Record [M] . +// | | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Record Type | Aux Data Len | Number of Sources (N) | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Multicast Address | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Source Address [1] | +// +- -+ +// | Source Address [2] | +// +- -+ +// | Source Address [N] | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | | +// . Auxiliary Data . +// | | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + +// IGMPv3GroupRecord stores individual group records for a V3 Membership Report message. +type IGMPv3GroupRecord struct { + Type IGMPv3GroupRecordType + AuxDataLen uint8 // this should always be 0 as per IGMPv3 spec. + NumberOfSources uint16 + MulticastAddress net.IP + SourceAddresses []net.IP + AuxData uint32 // NOT USED +} + +func (i *IGMP) decodeIGMPv3MembershipReport(data []byte) error { + if len(data) < 8 { + return errors.New("IGMPv3 Membership Report too small #1") + } + + i.Checksum = binary.BigEndian.Uint16(data[2:4]) + i.NumberOfGroupRecords = binary.BigEndian.Uint16(data[6:8]) + + recordOffset := 8 + for j := 0; j < int(i.NumberOfGroupRecords); j++ { + if len(data) < recordOffset+8 { + return errors.New("IGMPv3 Membership Report too small #2") + } + + var gr IGMPv3GroupRecord + gr.Type = IGMPv3GroupRecordType(data[recordOffset]) + gr.AuxDataLen = data[recordOffset+1] + gr.NumberOfSources = binary.BigEndian.Uint16(data[recordOffset+2 : recordOffset+4]) + gr.MulticastAddress = net.IP(data[recordOffset+4 : recordOffset+8]) + + if len(data) < recordOffset+8+int(gr.NumberOfSources)*4 { + return errors.New("IGMPv3 Membership Report too small #3") + } + + // append source address records. + for i := 0; i < int(gr.NumberOfSources); i++ { + sourceAddr := net.IP(data[recordOffset+8+i*4 : recordOffset+12+i*4]) + gr.SourceAddresses = append(gr.SourceAddresses, sourceAddr) + } + + i.GroupRecords = append(i.GroupRecords, gr) + recordOffset += 8 + 4*int(gr.NumberOfSources) + } + return nil +} + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 0x11 | Max Resp Code | Checksum | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Group Address | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Resv |S| QRV | QQIC | Number of Sources (N) | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Source Address [1] | +// +- -+ +// | Source Address [2] | +// +- . -+ +// | Source Address [N] | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// +// decodeIGMPv3MembershipQuery parses the IGMPv3 message of type 0x11 +func (i *IGMP) decodeIGMPv3MembershipQuery(data []byte) error { + if len(data) < 12 { + return errors.New("IGMPv3 Membership Query too small #1") + } + + i.MaxResponseTime = igmpTimeDecode(data[1]) + i.Checksum = binary.BigEndian.Uint16(data[2:4]) + i.SupressRouterProcessing = data[8]&0x8 != 0 + i.GroupAddress = net.IP(data[4:8]) + i.RobustnessValue = data[8] & 0x7 + i.IntervalTime = igmpTimeDecode(data[9]) + i.NumberOfSources = binary.BigEndian.Uint16(data[10:12]) + + if len(data) < 12+int(i.NumberOfSources)*4 { + return errors.New("IGMPv3 Membership Query too small #2") + } + + for j := 0; j < int(i.NumberOfSources); j++ { + i.SourceAddresses = append(i.SourceAddresses, net.IP(data[12+j*4:16+j*4])) + } + + return nil +} + +// igmpTimeDecode decodes the duration created by the given byte, using the +// algorithm in http://www.rfc-base.org/txt/rfc-3376.txt section 4.1.1. +func igmpTimeDecode(t uint8) time.Duration { + if t&0x80 == 0 { + return time.Millisecond * 100 * time.Duration(t) + } + mant := (t & 0x70) >> 4 + exp := t & 0x0F + return time.Millisecond * 100 * time.Duration((mant|0x10)<<(exp+3)) +} + +// LayerType returns LayerTypeIGMP for the V1,2,3 message protocol formats. +func (i *IGMP) LayerType() gopacket.LayerType { return LayerTypeIGMP } +func (i *IGMPv1or2) LayerType() gopacket.LayerType { return LayerTypeIGMP } + +func (i *IGMPv1or2) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 8 { + return errors.New("IGMP Packet too small") + } + + i.Type = IGMPType(data[0]) + i.MaxResponseTime = igmpTimeDecode(data[1]) + i.Checksum = binary.BigEndian.Uint16(data[2:4]) + i.GroupAddress = net.IP(data[4:8]) + + return nil +} + +func (i *IGMPv1or2) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypeZero +} + +func (i *IGMPv1or2) CanDecode() gopacket.LayerClass { + return LayerTypeIGMP +} + +// DecodeFromBytes decodes the given bytes into this layer. +func (i *IGMP) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 1 { + return errors.New("IGMP packet is too small") + } + + // common IGMP header values between versions 1..3 of IGMP specification.. + i.Type = IGMPType(data[0]) + + switch i.Type { + case IGMPMembershipQuery: + i.decodeIGMPv3MembershipQuery(data) + case IGMPMembershipReportV3: + i.decodeIGMPv3MembershipReport(data) + default: + return errors.New("unsupported IGMP type") + } + + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (i *IGMP) CanDecode() gopacket.LayerClass { + return LayerTypeIGMP +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (i *IGMP) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypeZero +} + +// decodeIGMP will parse IGMP v1,2 or 3 protocols. Checks against the +// IGMP type are performed against byte[0], logic then iniitalizes and +// passes the appropriate struct (IGMP or IGMPv1or2) to +// decodingLayerDecoder. +func decodeIGMP(data []byte, p gopacket.PacketBuilder) error { + if len(data) < 1 { + return errors.New("IGMP packet is too small") + } + + // byte 0 contains IGMP message type. + switch IGMPType(data[0]) { + case IGMPMembershipQuery: + // IGMPv3 Membership Query payload is >= 12 + if len(data) >= 12 { + i := &IGMP{Version: 3} + return decodingLayerDecoder(i, data, p) + } else if len(data) == 8 { + i := &IGMPv1or2{} + if data[1] == 0x00 { + i.Version = 1 // IGMPv1 has a query length of 8 and MaxResp = 0 + } else { + i.Version = 2 // IGMPv2 has a query length of 8 and MaxResp != 0 + } + + return decodingLayerDecoder(i, data, p) + } + case IGMPMembershipReportV3: + i := &IGMP{Version: 3} + return decodingLayerDecoder(i, data, p) + case IGMPMembershipReportV1: + i := &IGMPv1or2{Version: 1} + return decodingLayerDecoder(i, data, p) + case IGMPLeaveGroup, IGMPMembershipReportV2: + // leave group and Query Report v2 used in IGMPv2 only. + i := &IGMPv1or2{Version: 2} + return decodingLayerDecoder(i, data, p) + default: + } + + return errors.New("Unable to determine IGMP type.") +} diff --git a/backend/vendor/github.com/google/gopacket/layers/ip4.go b/backend/vendor/github.com/google/gopacket/layers/ip4.go new file mode 100644 index 0000000..2b3c0c6 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/ip4.go @@ -0,0 +1,325 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// Copyright 2009-2011 Andreas Krennmair. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + "net" + "strings" + + "github.com/google/gopacket" +) + +type IPv4Flag uint8 + +const ( + IPv4EvilBit IPv4Flag = 1 << 2 // http://tools.ietf.org/html/rfc3514 ;) + IPv4DontFragment IPv4Flag = 1 << 1 + IPv4MoreFragments IPv4Flag = 1 << 0 +) + +func (f IPv4Flag) String() string { + var s []string + if f&IPv4EvilBit != 0 { + s = append(s, "Evil") + } + if f&IPv4DontFragment != 0 { + s = append(s, "DF") + } + if f&IPv4MoreFragments != 0 { + s = append(s, "MF") + } + return strings.Join(s, "|") +} + +// IPv4 is the header of an IP packet. +type IPv4 struct { + BaseLayer + Version uint8 + IHL uint8 + TOS uint8 + Length uint16 + Id uint16 + Flags IPv4Flag + FragOffset uint16 + TTL uint8 + Protocol IPProtocol + Checksum uint16 + SrcIP net.IP + DstIP net.IP + Options []IPv4Option + Padding []byte +} + +// LayerType returns LayerTypeIPv4 +func (i *IPv4) LayerType() gopacket.LayerType { return LayerTypeIPv4 } +func (i *IPv4) NetworkFlow() gopacket.Flow { + return gopacket.NewFlow(EndpointIPv4, i.SrcIP, i.DstIP) +} + +type IPv4Option struct { + OptionType uint8 + OptionLength uint8 + OptionData []byte +} + +func (i IPv4Option) String() string { + return fmt.Sprintf("IPv4Option(%v:%v)", i.OptionType, i.OptionData) +} + +// for the current ipv4 options, return the number of bytes (including +// padding that the options used) +func (ip *IPv4) getIPv4OptionSize() uint8 { + optionSize := uint8(0) + for _, opt := range ip.Options { + switch opt.OptionType { + case 0: + // this is the end of option lists + optionSize++ + case 1: + // this is the padding + optionSize++ + default: + optionSize += opt.OptionLength + + } + } + // make sure the options are aligned to 32 bit boundary + if (optionSize % 4) != 0 { + optionSize += 4 - (optionSize % 4) + } + return optionSize +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +func (ip *IPv4) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + optionLength := ip.getIPv4OptionSize() + bytes, err := b.PrependBytes(20 + int(optionLength)) + if err != nil { + return err + } + if opts.FixLengths { + ip.IHL = 5 + (optionLength / 4) + ip.Length = uint16(len(b.Bytes())) + } + bytes[0] = (ip.Version << 4) | ip.IHL + bytes[1] = ip.TOS + binary.BigEndian.PutUint16(bytes[2:], ip.Length) + binary.BigEndian.PutUint16(bytes[4:], ip.Id) + binary.BigEndian.PutUint16(bytes[6:], ip.flagsfrags()) + bytes[8] = ip.TTL + bytes[9] = byte(ip.Protocol) + if err := ip.AddressTo4(); err != nil { + return err + } + copy(bytes[12:16], ip.SrcIP) + copy(bytes[16:20], ip.DstIP) + + curLocation := 20 + // Now, we will encode the options + for _, opt := range ip.Options { + switch opt.OptionType { + case 0: + // this is the end of option lists + bytes[curLocation] = 0 + curLocation++ + case 1: + // this is the padding + bytes[curLocation] = 1 + curLocation++ + default: + bytes[curLocation] = opt.OptionType + bytes[curLocation+1] = opt.OptionLength + + // sanity checking to protect us from buffer overrun + if len(opt.OptionData) > int(opt.OptionLength-2) { + return errors.New("option length is smaller than length of option data") + } + copy(bytes[curLocation+2:curLocation+int(opt.OptionLength)], opt.OptionData) + curLocation += int(opt.OptionLength) + } + } + + if opts.ComputeChecksums { + ip.Checksum = checksum(bytes) + } + binary.BigEndian.PutUint16(bytes[10:], ip.Checksum) + return nil +} + +func checksum(bytes []byte) uint16 { + // Clear checksum bytes + bytes[10] = 0 + bytes[11] = 0 + + // Compute checksum + var csum uint32 + for i := 0; i < len(bytes); i += 2 { + csum += uint32(bytes[i]) << 8 + csum += uint32(bytes[i+1]) + } + for { + // Break when sum is less or equals to 0xFFFF + if csum <= 65535 { + break + } + // Add carry to the sum + csum = (csum >> 16) + uint32(uint16(csum)) + } + // Flip all the bits + return ^uint16(csum) +} + +func (ip *IPv4) flagsfrags() (ff uint16) { + ff |= uint16(ip.Flags) << 13 + ff |= ip.FragOffset + return +} + +// DecodeFromBytes decodes the given bytes into this layer. +func (ip *IPv4) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 20 { + df.SetTruncated() + return fmt.Errorf("Invalid ip4 header. Length %d less than 20", len(data)) + } + flagsfrags := binary.BigEndian.Uint16(data[6:8]) + + ip.Version = uint8(data[0]) >> 4 + ip.IHL = uint8(data[0]) & 0x0F + ip.TOS = data[1] + ip.Length = binary.BigEndian.Uint16(data[2:4]) + ip.Id = binary.BigEndian.Uint16(data[4:6]) + ip.Flags = IPv4Flag(flagsfrags >> 13) + ip.FragOffset = flagsfrags & 0x1FFF + ip.TTL = data[8] + ip.Protocol = IPProtocol(data[9]) + ip.Checksum = binary.BigEndian.Uint16(data[10:12]) + ip.SrcIP = data[12:16] + ip.DstIP = data[16:20] + ip.Options = ip.Options[:0] + ip.Padding = nil + // Set up an initial guess for contents/payload... we'll reset these soon. + ip.BaseLayer = BaseLayer{Contents: data} + + // This code is added for the following enviroment: + // * Windows 10 with TSO option activated. ( tested on Hyper-V, RealTek ethernet driver ) + if ip.Length == 0 { + // If using TSO(TCP Segmentation Offload), length is zero. + // The actual packet length is the length of data. + ip.Length = uint16(len(data)) + } + + if ip.Length < 20 { + return fmt.Errorf("Invalid (too small) IP length (%d < 20)", ip.Length) + } else if ip.IHL < 5 { + return fmt.Errorf("Invalid (too small) IP header length (%d < 5)", ip.IHL) + } else if int(ip.IHL*4) > int(ip.Length) { + return fmt.Errorf("Invalid IP header length > IP length (%d > %d)", ip.IHL, ip.Length) + } + if cmp := len(data) - int(ip.Length); cmp > 0 { + data = data[:ip.Length] + } else if cmp < 0 { + df.SetTruncated() + if int(ip.IHL)*4 > len(data) { + return errors.New("Not all IP header bytes available") + } + } + ip.Contents = data[:ip.IHL*4] + ip.Payload = data[ip.IHL*4:] + // From here on, data contains the header options. + data = data[20 : ip.IHL*4] + // Pull out IP options + for len(data) > 0 { + if ip.Options == nil { + // Pre-allocate to avoid growing the slice too much. + ip.Options = make([]IPv4Option, 0, 4) + } + opt := IPv4Option{OptionType: data[0]} + switch opt.OptionType { + case 0: // End of options + opt.OptionLength = 1 + ip.Options = append(ip.Options, opt) + ip.Padding = data[1:] + return nil + case 1: // 1 byte padding + opt.OptionLength = 1 + data = data[1:] + ip.Options = append(ip.Options, opt) + default: + if len(data) < 2 { + df.SetTruncated() + return fmt.Errorf("Invalid ip4 option length. Length %d less than 2", len(data)) + } + opt.OptionLength = data[1] + if len(data) < int(opt.OptionLength) { + df.SetTruncated() + return fmt.Errorf("IP option length exceeds remaining IP header size, option type %v length %v", opt.OptionType, opt.OptionLength) + } + if opt.OptionLength <= 2 { + return fmt.Errorf("Invalid IP option type %v length %d. Must be greater than 2", opt.OptionType, opt.OptionLength) + } + opt.OptionData = data[2:opt.OptionLength] + data = data[opt.OptionLength:] + ip.Options = append(ip.Options, opt) + } + } + return nil +} + +func (i *IPv4) CanDecode() gopacket.LayerClass { + return LayerTypeIPv4 +} + +func (i *IPv4) NextLayerType() gopacket.LayerType { + if i.Flags&IPv4MoreFragments != 0 || i.FragOffset != 0 { + return gopacket.LayerTypeFragment + } + return i.Protocol.LayerType() +} + +func decodeIPv4(data []byte, p gopacket.PacketBuilder) error { + ip := &IPv4{} + err := ip.DecodeFromBytes(data, p) + p.AddLayer(ip) + p.SetNetworkLayer(ip) + if err != nil { + return err + } + return p.NextDecoder(ip.NextLayerType()) +} + +func checkIPv4Address(addr net.IP) (net.IP, error) { + if c := addr.To4(); c != nil { + return c, nil + } + if len(addr) == net.IPv6len { + return nil, errors.New("address is IPv6") + } + return nil, fmt.Errorf("wrong length of %d bytes instead of %d", len(addr), net.IPv4len) +} + +func (ip *IPv4) AddressTo4() error { + var src, dst net.IP + + if addr, err := checkIPv4Address(ip.SrcIP); err != nil { + return fmt.Errorf("Invalid source IPv4 address (%s)", err) + } else { + src = addr + } + if addr, err := checkIPv4Address(ip.DstIP); err != nil { + return fmt.Errorf("Invalid destination IPv4 address (%s)", err) + } else { + dst = addr + } + ip.SrcIP = src + ip.DstIP = dst + return nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/ip6.go b/backend/vendor/github.com/google/gopacket/layers/ip6.go new file mode 100644 index 0000000..87b9d33 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/ip6.go @@ -0,0 +1,722 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// Copyright 2009-2011 Andreas Krennmair. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + "net" + + "github.com/google/gopacket" +) + +const ( + // IPv6HopByHopOptionJumbogram code as defined in RFC 2675 + IPv6HopByHopOptionJumbogram = 0xC2 +) + +const ( + ipv6MaxPayloadLength = 65535 +) + +// IPv6 is the layer for the IPv6 header. +type IPv6 struct { + // http://www.networksorcery.com/enp/protocol/ipv6.htm + BaseLayer + Version uint8 + TrafficClass uint8 + FlowLabel uint32 + Length uint16 + NextHeader IPProtocol + HopLimit uint8 + SrcIP net.IP + DstIP net.IP + HopByHop *IPv6HopByHop + // hbh will be pointed to by HopByHop if that layer exists. + hbh IPv6HopByHop +} + +// LayerType returns LayerTypeIPv6 +func (ipv6 *IPv6) LayerType() gopacket.LayerType { return LayerTypeIPv6 } + +// NetworkFlow returns this new Flow (EndpointIPv6, SrcIP, DstIP) +func (ipv6 *IPv6) NetworkFlow() gopacket.Flow { + return gopacket.NewFlow(EndpointIPv6, ipv6.SrcIP, ipv6.DstIP) +} + +// Search for Jumbo Payload TLV in IPv6HopByHop and return (length, true) if found +func getIPv6HopByHopJumboLength(hopopts *IPv6HopByHop) (uint32, bool, error) { + var tlv *IPv6HopByHopOption + + for _, t := range hopopts.Options { + if t.OptionType == IPv6HopByHopOptionJumbogram { + tlv = t + break + } + } + if tlv == nil { + // Not found + return 0, false, nil + } + if len(tlv.OptionData) != 4 { + return 0, false, errors.New("Jumbo length TLV data must have length 4") + } + l := binary.BigEndian.Uint32(tlv.OptionData) + if l <= ipv6MaxPayloadLength { + return 0, false, fmt.Errorf("Jumbo length cannot be less than %d", ipv6MaxPayloadLength+1) + } + // Found + return l, true, nil +} + +// Adds zero-valued Jumbo TLV to IPv6 header if it does not exist +// (if necessary add hop-by-hop header) +func addIPv6JumboOption(ip6 *IPv6) { + var tlv *IPv6HopByHopOption + + if ip6.HopByHop == nil { + // Add IPv6 HopByHop + ip6.HopByHop = &IPv6HopByHop{} + ip6.HopByHop.NextHeader = ip6.NextHeader + ip6.HopByHop.HeaderLength = 0 + ip6.NextHeader = IPProtocolIPv6HopByHop + } + for _, t := range ip6.HopByHop.Options { + if t.OptionType == IPv6HopByHopOptionJumbogram { + tlv = t + break + } + } + if tlv == nil { + // Add Jumbo TLV + tlv = &IPv6HopByHopOption{} + ip6.HopByHop.Options = append(ip6.HopByHop.Options, tlv) + } + tlv.SetJumboLength(0) +} + +// Set jumbo length in serialized IPv6 payload (starting with HopByHop header) +func setIPv6PayloadJumboLength(hbh []byte) error { + pLen := len(hbh) + if pLen < 8 { + //HopByHop is minimum 8 bytes + return fmt.Errorf("Invalid IPv6 payload (length %d)", pLen) + } + hbhLen := int((hbh[1] + 1) * 8) + if hbhLen > pLen { + return fmt.Errorf("Invalid hop-by-hop length (length: %d, payload: %d", hbhLen, pLen) + } + offset := 2 //start with options + for offset < hbhLen { + opt := hbh[offset] + if opt == 0 { + //Pad1 + offset++ + continue + } + optLen := int(hbh[offset+1]) + if opt == IPv6HopByHopOptionJumbogram { + if optLen == 4 { + binary.BigEndian.PutUint32(hbh[offset+2:], uint32(pLen)) + return nil + } + return fmt.Errorf("Jumbo TLV too short (%d bytes)", optLen) + } + offset += 2 + optLen + } + return errors.New("Jumbo TLV not found") +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (ipv6 *IPv6) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + var jumbo bool + var err error + + payload := b.Bytes() + pLen := len(payload) + if pLen > ipv6MaxPayloadLength { + jumbo = true + if opts.FixLengths { + // We need to set the length later because the hop-by-hop header may + // not exist or else need padding, so pLen may yet change + addIPv6JumboOption(ipv6) + } else if ipv6.HopByHop == nil { + return fmt.Errorf("Cannot fit payload length of %d into IPv6 packet", pLen) + } else { + _, ok, err := getIPv6HopByHopJumboLength(ipv6.HopByHop) + if err != nil { + return err + } + if !ok { + return errors.New("Missing jumbo length hop-by-hop option") + } + } + } + + hbhAlreadySerialized := false + if ipv6.HopByHop != nil { + for _, l := range b.Layers() { + if l == LayerTypeIPv6HopByHop { + hbhAlreadySerialized = true + break + } + } + } + if ipv6.HopByHop != nil && !hbhAlreadySerialized { + if ipv6.NextHeader != IPProtocolIPv6HopByHop { + // Just fix it instead of throwing an error + ipv6.NextHeader = IPProtocolIPv6HopByHop + } + err = ipv6.HopByHop.SerializeTo(b, opts) + if err != nil { + return err + } + payload = b.Bytes() + pLen = len(payload) + if opts.FixLengths && jumbo { + err := setIPv6PayloadJumboLength(payload) + if err != nil { + return err + } + } + } + + if !jumbo && pLen > ipv6MaxPayloadLength { + return errors.New("Cannot fit payload into IPv6 header") + } + bytes, err := b.PrependBytes(40) + if err != nil { + return err + } + bytes[0] = (ipv6.Version << 4) | (ipv6.TrafficClass >> 4) + bytes[1] = (ipv6.TrafficClass << 4) | uint8(ipv6.FlowLabel>>16) + binary.BigEndian.PutUint16(bytes[2:], uint16(ipv6.FlowLabel)) + if opts.FixLengths { + if jumbo { + ipv6.Length = 0 + } else { + ipv6.Length = uint16(pLen) + } + } + binary.BigEndian.PutUint16(bytes[4:], ipv6.Length) + bytes[6] = byte(ipv6.NextHeader) + bytes[7] = byte(ipv6.HopLimit) + if err := ipv6.AddressTo16(); err != nil { + return err + } + copy(bytes[8:], ipv6.SrcIP) + copy(bytes[24:], ipv6.DstIP) + return nil +} + +// DecodeFromBytes implementation according to gopacket.DecodingLayer +func (ipv6 *IPv6) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 40 { + df.SetTruncated() + return fmt.Errorf("Invalid ip6 header. Length %d less than 40", len(data)) + } + ipv6.Version = uint8(data[0]) >> 4 + ipv6.TrafficClass = uint8((binary.BigEndian.Uint16(data[0:2]) >> 4) & 0x00FF) + ipv6.FlowLabel = binary.BigEndian.Uint32(data[0:4]) & 0x000FFFFF + ipv6.Length = binary.BigEndian.Uint16(data[4:6]) + ipv6.NextHeader = IPProtocol(data[6]) + ipv6.HopLimit = data[7] + ipv6.SrcIP = data[8:24] + ipv6.DstIP = data[24:40] + ipv6.HopByHop = nil + ipv6.BaseLayer = BaseLayer{data[:40], data[40:]} + + // We treat a HopByHop IPv6 option as part of the IPv6 packet, since its + // options are crucial for understanding what's actually happening per packet. + if ipv6.NextHeader == IPProtocolIPv6HopByHop { + err := ipv6.hbh.DecodeFromBytes(ipv6.Payload, df) + if err != nil { + return err + } + ipv6.HopByHop = &ipv6.hbh + pEnd, jumbo, err := getIPv6HopByHopJumboLength(ipv6.HopByHop) + if err != nil { + return err + } + if jumbo && ipv6.Length == 0 { + pEnd := int(pEnd) + if pEnd > len(ipv6.Payload) { + df.SetTruncated() + pEnd = len(ipv6.Payload) + } + ipv6.Payload = ipv6.Payload[:pEnd] + return nil + } else if jumbo && ipv6.Length != 0 { + return errors.New("IPv6 has jumbo length and IPv6 length is not 0") + } else if !jumbo && ipv6.Length == 0 { + return errors.New("IPv6 length 0, but HopByHop header does not have jumbogram option") + } else { + ipv6.Payload = ipv6.Payload[ipv6.hbh.ActualLength:] + } + } + + if ipv6.Length == 0 { + return fmt.Errorf("IPv6 length 0, but next header is %v, not HopByHop", ipv6.NextHeader) + } + + pEnd := int(ipv6.Length) + if pEnd > len(ipv6.Payload) { + df.SetTruncated() + pEnd = len(ipv6.Payload) + } + ipv6.Payload = ipv6.Payload[:pEnd] + + return nil +} + +// CanDecode implementation according to gopacket.DecodingLayer +func (ipv6 *IPv6) CanDecode() gopacket.LayerClass { + return LayerTypeIPv6 +} + +// NextLayerType implementation according to gopacket.DecodingLayer +func (ipv6 *IPv6) NextLayerType() gopacket.LayerType { + if ipv6.HopByHop != nil { + return ipv6.HopByHop.NextHeader.LayerType() + } + return ipv6.NextHeader.LayerType() +} + +func decodeIPv6(data []byte, p gopacket.PacketBuilder) error { + ip6 := &IPv6{} + err := ip6.DecodeFromBytes(data, p) + p.AddLayer(ip6) + p.SetNetworkLayer(ip6) + if ip6.HopByHop != nil { + p.AddLayer(ip6.HopByHop) + } + if err != nil { + return err + } + return p.NextDecoder(ip6.NextLayerType()) +} + +type ipv6HeaderTLVOption struct { + OptionType, OptionLength uint8 + ActualLength int + OptionData []byte + OptionAlignment [2]uint8 // Xn+Y = [2]uint8{X, Y} +} + +func (h *ipv6HeaderTLVOption) serializeTo(data []byte, fixLengths bool, dryrun bool) int { + if fixLengths { + h.OptionLength = uint8(len(h.OptionData)) + } + length := int(h.OptionLength) + 2 + if !dryrun { + data[0] = h.OptionType + data[1] = h.OptionLength + copy(data[2:], h.OptionData) + } + return length +} + +func decodeIPv6HeaderTLVOption(data []byte, df gopacket.DecodeFeedback) (h *ipv6HeaderTLVOption, _ error) { + if len(data) < 2 { + df.SetTruncated() + return nil, errors.New("IPv6 header option too small") + } + h = &ipv6HeaderTLVOption{} + if data[0] == 0 { + h.ActualLength = 1 + return + } + h.OptionType = data[0] + h.OptionLength = data[1] + h.ActualLength = int(h.OptionLength) + 2 + if len(data) < h.ActualLength { + df.SetTruncated() + return nil, errors.New("IPv6 header TLV option too small") + } + h.OptionData = data[2:h.ActualLength] + return +} + +func serializeTLVOptionPadding(data []byte, padLength int) { + if padLength <= 0 { + return + } + if padLength == 1 { + data[0] = 0x0 + return + } + tlvLength := uint8(padLength) - 2 + data[0] = 0x1 + data[1] = tlvLength + if tlvLength != 0 { + for k := range data[2:] { + data[k+2] = 0x0 + } + } + return +} + +// If buf is 'nil' do a serialize dry run +func serializeIPv6HeaderTLVOptions(buf []byte, options []*ipv6HeaderTLVOption, fixLengths bool) int { + var l int + + dryrun := buf == nil + length := 2 + for _, opt := range options { + if fixLengths { + x := int(opt.OptionAlignment[0]) + y := int(opt.OptionAlignment[1]) + if x != 0 { + n := length / x + offset := x*n + y + if offset < length { + offset += x + } + if length != offset { + pad := offset - length + if !dryrun { + serializeTLVOptionPadding(buf[length-2:], pad) + } + length += pad + } + } + } + if dryrun { + l = opt.serializeTo(nil, fixLengths, true) + } else { + l = opt.serializeTo(buf[length-2:], fixLengths, false) + } + length += l + } + if fixLengths { + pad := length % 8 + if pad != 0 { + if !dryrun { + serializeTLVOptionPadding(buf[length-2:], pad) + } + length += pad + } + } + return length - 2 +} + +type ipv6ExtensionBase struct { + BaseLayer + NextHeader IPProtocol + HeaderLength uint8 + ActualLength int +} + +func decodeIPv6ExtensionBase(data []byte, df gopacket.DecodeFeedback) (i ipv6ExtensionBase, returnedErr error) { + if len(data) < 2 { + df.SetTruncated() + return ipv6ExtensionBase{}, fmt.Errorf("Invalid ip6-extension header. Length %d less than 2", len(data)) + } + i.NextHeader = IPProtocol(data[0]) + i.HeaderLength = data[1] + i.ActualLength = int(i.HeaderLength)*8 + 8 + if len(data) < i.ActualLength { + return ipv6ExtensionBase{}, fmt.Errorf("Invalid ip6-extension header. Length %d less than specified length %d", len(data), i.ActualLength) + } + i.Contents = data[:i.ActualLength] + i.Payload = data[i.ActualLength:] + return +} + +// IPv6ExtensionSkipper is a DecodingLayer which decodes and ignores v6 +// extensions. You can use it with a DecodingLayerParser to handle IPv6 stacks +// which may or may not have extensions. +type IPv6ExtensionSkipper struct { + NextHeader IPProtocol + BaseLayer +} + +// DecodeFromBytes implementation according to gopacket.DecodingLayer +func (i *IPv6ExtensionSkipper) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + extension, err := decodeIPv6ExtensionBase(data, df) + if err != nil { + return err + } + i.BaseLayer = BaseLayer{data[:extension.ActualLength], data[extension.ActualLength:]} + i.NextHeader = extension.NextHeader + return nil +} + +// CanDecode implementation according to gopacket.DecodingLayer +func (i *IPv6ExtensionSkipper) CanDecode() gopacket.LayerClass { + return LayerClassIPv6Extension +} + +// NextLayerType implementation according to gopacket.DecodingLayer +func (i *IPv6ExtensionSkipper) NextLayerType() gopacket.LayerType { + return i.NextHeader.LayerType() +} + +// IPv6HopByHopOption is a TLV option present in an IPv6 hop-by-hop extension. +type IPv6HopByHopOption ipv6HeaderTLVOption + +// IPv6HopByHop is the IPv6 hop-by-hop extension. +type IPv6HopByHop struct { + ipv6ExtensionBase + Options []*IPv6HopByHopOption +} + +// LayerType returns LayerTypeIPv6HopByHop. +func (i *IPv6HopByHop) LayerType() gopacket.LayerType { return LayerTypeIPv6HopByHop } + +// SerializeTo implementation according to gopacket.SerializableLayer +func (i *IPv6HopByHop) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + var bytes []byte + var err error + + o := make([]*ipv6HeaderTLVOption, 0, len(i.Options)) + for _, v := range i.Options { + o = append(o, (*ipv6HeaderTLVOption)(v)) + } + + l := serializeIPv6HeaderTLVOptions(nil, o, opts.FixLengths) + bytes, err = b.PrependBytes(l) + if err != nil { + return err + } + serializeIPv6HeaderTLVOptions(bytes, o, opts.FixLengths) + + length := len(bytes) + 2 + if length%8 != 0 { + return errors.New("IPv6HopByHop actual length must be multiple of 8") + } + bytes, err = b.PrependBytes(2) + if err != nil { + return err + } + bytes[0] = uint8(i.NextHeader) + if opts.FixLengths { + i.HeaderLength = uint8((length / 8) - 1) + } + bytes[1] = uint8(i.HeaderLength) + return nil +} + +// DecodeFromBytes implementation according to gopacket.DecodingLayer +func (i *IPv6HopByHop) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + var err error + i.ipv6ExtensionBase, err = decodeIPv6ExtensionBase(data, df) + if err != nil { + return err + } + i.Options = i.Options[:0] + offset := 2 + for offset < i.ActualLength { + opt, err := decodeIPv6HeaderTLVOption(data[offset:], df) + if err != nil { + return err + } + i.Options = append(i.Options, (*IPv6HopByHopOption)(opt)) + offset += opt.ActualLength + } + return nil +} + +func decodeIPv6HopByHop(data []byte, p gopacket.PacketBuilder) error { + i := &IPv6HopByHop{} + err := i.DecodeFromBytes(data, p) + p.AddLayer(i) + if err != nil { + return err + } + return p.NextDecoder(i.NextHeader) +} + +// SetJumboLength adds the IPv6HopByHopOptionJumbogram with the given length +func (o *IPv6HopByHopOption) SetJumboLength(len uint32) { + o.OptionType = IPv6HopByHopOptionJumbogram + o.OptionLength = 4 + o.ActualLength = 6 + if o.OptionData == nil { + o.OptionData = make([]byte, 4) + } + binary.BigEndian.PutUint32(o.OptionData, len) + o.OptionAlignment = [2]uint8{4, 2} +} + +// IPv6Routing is the IPv6 routing extension. +type IPv6Routing struct { + ipv6ExtensionBase + RoutingType uint8 + SegmentsLeft uint8 + // This segment is supposed to be zero according to RFC2460, the second set of + // 4 bytes in the extension. + Reserved []byte + // SourceRoutingIPs is the set of IPv6 addresses requested for source routing, + // set only if RoutingType == 0. + SourceRoutingIPs []net.IP +} + +// LayerType returns LayerTypeIPv6Routing. +func (i *IPv6Routing) LayerType() gopacket.LayerType { return LayerTypeIPv6Routing } + +func decodeIPv6Routing(data []byte, p gopacket.PacketBuilder) error { + base, err := decodeIPv6ExtensionBase(data, p) + if err != nil { + return err + } + i := &IPv6Routing{ + ipv6ExtensionBase: base, + RoutingType: data[2], + SegmentsLeft: data[3], + Reserved: data[4:8], + } + switch i.RoutingType { + case 0: // Source routing + if (i.ActualLength-8)%16 != 0 { + return fmt.Errorf("Invalid IPv6 source routing, length of type 0 packet %d", i.ActualLength) + } + for d := i.Contents[8:]; len(d) >= 16; d = d[16:] { + i.SourceRoutingIPs = append(i.SourceRoutingIPs, net.IP(d[:16])) + } + default: + return fmt.Errorf("Unknown IPv6 routing header type %d", i.RoutingType) + } + p.AddLayer(i) + return p.NextDecoder(i.NextHeader) +} + +// IPv6Fragment is the IPv6 fragment header, used for packet +// fragmentation/defragmentation. +type IPv6Fragment struct { + BaseLayer + NextHeader IPProtocol + // Reserved1 is bits [8-16), from least to most significant, 0-indexed + Reserved1 uint8 + FragmentOffset uint16 + // Reserved2 is bits [29-31), from least to most significant, 0-indexed + Reserved2 uint8 + MoreFragments bool + Identification uint32 +} + +// LayerType returns LayerTypeIPv6Fragment. +func (i *IPv6Fragment) LayerType() gopacket.LayerType { return LayerTypeIPv6Fragment } + +func decodeIPv6Fragment(data []byte, p gopacket.PacketBuilder) error { + if len(data) < 8 { + p.SetTruncated() + return fmt.Errorf("Invalid ip6-fragment header. Length %d less than 8", len(data)) + } + i := &IPv6Fragment{ + BaseLayer: BaseLayer{data[:8], data[8:]}, + NextHeader: IPProtocol(data[0]), + Reserved1: data[1], + FragmentOffset: binary.BigEndian.Uint16(data[2:4]) >> 3, + Reserved2: data[3] & 0x6 >> 1, + MoreFragments: data[3]&0x1 != 0, + Identification: binary.BigEndian.Uint32(data[4:8]), + } + p.AddLayer(i) + return p.NextDecoder(gopacket.DecodeFragment) +} + +// IPv6DestinationOption is a TLV option present in an IPv6 destination options extension. +type IPv6DestinationOption ipv6HeaderTLVOption + +// IPv6Destination is the IPv6 destination options header. +type IPv6Destination struct { + ipv6ExtensionBase + Options []*IPv6DestinationOption +} + +// LayerType returns LayerTypeIPv6Destination. +func (i *IPv6Destination) LayerType() gopacket.LayerType { return LayerTypeIPv6Destination } + +// DecodeFromBytes implementation according to gopacket.DecodingLayer +func (i *IPv6Destination) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + var err error + i.ipv6ExtensionBase, err = decodeIPv6ExtensionBase(data, df) + if err != nil { + return err + } + offset := 2 + for offset < i.ActualLength { + opt, err := decodeIPv6HeaderTLVOption(data[offset:], df) + if err != nil { + return err + } + i.Options = append(i.Options, (*IPv6DestinationOption)(opt)) + offset += opt.ActualLength + } + return nil +} + +func decodeIPv6Destination(data []byte, p gopacket.PacketBuilder) error { + i := &IPv6Destination{} + err := i.DecodeFromBytes(data, p) + p.AddLayer(i) + if err != nil { + return err + } + return p.NextDecoder(i.NextHeader) +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (i *IPv6Destination) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + var bytes []byte + var err error + + o := make([]*ipv6HeaderTLVOption, 0, len(i.Options)) + for _, v := range i.Options { + o = append(o, (*ipv6HeaderTLVOption)(v)) + } + + l := serializeIPv6HeaderTLVOptions(nil, o, opts.FixLengths) + bytes, err = b.PrependBytes(l) + if err != nil { + return err + } + serializeIPv6HeaderTLVOptions(bytes, o, opts.FixLengths) + + length := len(bytes) + 2 + if length%8 != 0 { + return errors.New("IPv6Destination actual length must be multiple of 8") + } + bytes, err = b.PrependBytes(2) + if err != nil { + return err + } + bytes[0] = uint8(i.NextHeader) + if opts.FixLengths { + i.HeaderLength = uint8((length / 8) - 1) + } + bytes[1] = uint8(i.HeaderLength) + return nil +} + +func checkIPv6Address(addr net.IP) error { + if len(addr) == net.IPv6len { + return nil + } + if len(addr) == net.IPv4len { + return errors.New("address is IPv4") + } + return fmt.Errorf("wrong length of %d bytes instead of %d", len(addr), net.IPv6len) +} + +// AddressTo16 ensures IPv6.SrcIP and IPv6.DstIP are actually IPv6 addresses (i.e. 16 byte addresses) +func (ipv6 *IPv6) AddressTo16() error { + if err := checkIPv6Address(ipv6.SrcIP); err != nil { + return fmt.Errorf("Invalid source IPv6 address (%s)", err) + } + if err := checkIPv6Address(ipv6.DstIP); err != nil { + return fmt.Errorf("Invalid destination IPv6 address (%s)", err) + } + return nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/ipsec.go b/backend/vendor/github.com/google/gopacket/layers/ipsec.go new file mode 100644 index 0000000..12f31ca --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/ipsec.go @@ -0,0 +1,77 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "github.com/google/gopacket" +) + +// IPSecAH is the authentication header for IPv4/6 defined in +// http://tools.ietf.org/html/rfc2402 +type IPSecAH struct { + // While the auth header can be used for both IPv4 and v6, its format is that of + // an IPv6 extension (NextHeader, PayloadLength, etc...), so we use ipv6ExtensionBase + // to build it. + ipv6ExtensionBase + Reserved uint16 + SPI, Seq uint32 + AuthenticationData []byte +} + +// LayerType returns LayerTypeIPSecAH. +func (i *IPSecAH) LayerType() gopacket.LayerType { return LayerTypeIPSecAH } + +func decodeIPSecAH(data []byte, p gopacket.PacketBuilder) error { + if len(data) < 12 { + p.SetTruncated() + return errors.New("IPSec AH packet less than 12 bytes") + } + i := &IPSecAH{ + ipv6ExtensionBase: ipv6ExtensionBase{ + NextHeader: IPProtocol(data[0]), + HeaderLength: data[1], + }, + Reserved: binary.BigEndian.Uint16(data[2:4]), + SPI: binary.BigEndian.Uint32(data[4:8]), + Seq: binary.BigEndian.Uint32(data[8:12]), + } + i.ActualLength = (int(i.HeaderLength) + 2) * 4 + if len(data) < i.ActualLength { + p.SetTruncated() + return errors.New("Truncated AH packet < ActualLength") + } + i.AuthenticationData = data[12:i.ActualLength] + i.Contents = data[:i.ActualLength] + i.Payload = data[i.ActualLength:] + p.AddLayer(i) + return p.NextDecoder(i.NextHeader) +} + +// IPSecESP is the encapsulating security payload defined in +// http://tools.ietf.org/html/rfc2406 +type IPSecESP struct { + BaseLayer + SPI, Seq uint32 + // Encrypted contains the encrypted set of bytes sent in an ESP + Encrypted []byte +} + +// LayerType returns LayerTypeIPSecESP. +func (i *IPSecESP) LayerType() gopacket.LayerType { return LayerTypeIPSecESP } + +func decodeIPSecESP(data []byte, p gopacket.PacketBuilder) error { + i := &IPSecESP{ + BaseLayer: BaseLayer{data, nil}, + SPI: binary.BigEndian.Uint32(data[:4]), + Seq: binary.BigEndian.Uint32(data[4:8]), + Encrypted: data[8:], + } + p.AddLayer(i) + return nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/layertypes.go b/backend/vendor/github.com/google/gopacket/layers/layertypes.go new file mode 100644 index 0000000..69d25ae --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/layertypes.go @@ -0,0 +1,223 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "github.com/google/gopacket" +) + +var ( + LayerTypeARP = gopacket.RegisterLayerType(10, gopacket.LayerTypeMetadata{Name: "ARP", Decoder: gopacket.DecodeFunc(decodeARP)}) + LayerTypeCiscoDiscovery = gopacket.RegisterLayerType(11, gopacket.LayerTypeMetadata{Name: "CiscoDiscovery", Decoder: gopacket.DecodeFunc(decodeCiscoDiscovery)}) + LayerTypeEthernetCTP = gopacket.RegisterLayerType(12, gopacket.LayerTypeMetadata{Name: "EthernetCTP", Decoder: gopacket.DecodeFunc(decodeEthernetCTP)}) + LayerTypeEthernetCTPForwardData = gopacket.RegisterLayerType(13, gopacket.LayerTypeMetadata{Name: "EthernetCTPForwardData", Decoder: nil}) + LayerTypeEthernetCTPReply = gopacket.RegisterLayerType(14, gopacket.LayerTypeMetadata{Name: "EthernetCTPReply", Decoder: nil}) + LayerTypeDot1Q = gopacket.RegisterLayerType(15, gopacket.LayerTypeMetadata{Name: "Dot1Q", Decoder: gopacket.DecodeFunc(decodeDot1Q)}) + LayerTypeEtherIP = gopacket.RegisterLayerType(16, gopacket.LayerTypeMetadata{Name: "EtherIP", Decoder: gopacket.DecodeFunc(decodeEtherIP)}) + LayerTypeEthernet = gopacket.RegisterLayerType(17, gopacket.LayerTypeMetadata{Name: "Ethernet", Decoder: gopacket.DecodeFunc(decodeEthernet)}) + LayerTypeGRE = gopacket.RegisterLayerType(18, gopacket.LayerTypeMetadata{Name: "GRE", Decoder: gopacket.DecodeFunc(decodeGRE)}) + LayerTypeICMPv4 = gopacket.RegisterLayerType(19, gopacket.LayerTypeMetadata{Name: "ICMPv4", Decoder: gopacket.DecodeFunc(decodeICMPv4)}) + LayerTypeIPv4 = gopacket.RegisterLayerType(20, gopacket.LayerTypeMetadata{Name: "IPv4", Decoder: gopacket.DecodeFunc(decodeIPv4)}) + LayerTypeIPv6 = gopacket.RegisterLayerType(21, gopacket.LayerTypeMetadata{Name: "IPv6", Decoder: gopacket.DecodeFunc(decodeIPv6)}) + LayerTypeLLC = gopacket.RegisterLayerType(22, gopacket.LayerTypeMetadata{Name: "LLC", Decoder: gopacket.DecodeFunc(decodeLLC)}) + LayerTypeSNAP = gopacket.RegisterLayerType(23, gopacket.LayerTypeMetadata{Name: "SNAP", Decoder: gopacket.DecodeFunc(decodeSNAP)}) + LayerTypeMPLS = gopacket.RegisterLayerType(24, gopacket.LayerTypeMetadata{Name: "MPLS", Decoder: gopacket.DecodeFunc(decodeMPLS)}) + LayerTypePPP = gopacket.RegisterLayerType(25, gopacket.LayerTypeMetadata{Name: "PPP", Decoder: gopacket.DecodeFunc(decodePPP)}) + LayerTypePPPoE = gopacket.RegisterLayerType(26, gopacket.LayerTypeMetadata{Name: "PPPoE", Decoder: gopacket.DecodeFunc(decodePPPoE)}) + LayerTypeRUDP = gopacket.RegisterLayerType(27, gopacket.LayerTypeMetadata{Name: "RUDP", Decoder: gopacket.DecodeFunc(decodeRUDP)}) + LayerTypeSCTP = gopacket.RegisterLayerType(28, gopacket.LayerTypeMetadata{Name: "SCTP", Decoder: gopacket.DecodeFunc(decodeSCTP)}) + LayerTypeSCTPUnknownChunkType = gopacket.RegisterLayerType(29, gopacket.LayerTypeMetadata{Name: "SCTPUnknownChunkType", Decoder: nil}) + LayerTypeSCTPData = gopacket.RegisterLayerType(30, gopacket.LayerTypeMetadata{Name: "SCTPData", Decoder: nil}) + LayerTypeSCTPInit = gopacket.RegisterLayerType(31, gopacket.LayerTypeMetadata{Name: "SCTPInit", Decoder: nil}) + LayerTypeSCTPSack = gopacket.RegisterLayerType(32, gopacket.LayerTypeMetadata{Name: "SCTPSack", Decoder: nil}) + LayerTypeSCTPHeartbeat = gopacket.RegisterLayerType(33, gopacket.LayerTypeMetadata{Name: "SCTPHeartbeat", Decoder: nil}) + LayerTypeSCTPError = gopacket.RegisterLayerType(34, gopacket.LayerTypeMetadata{Name: "SCTPError", Decoder: nil}) + LayerTypeSCTPShutdown = gopacket.RegisterLayerType(35, gopacket.LayerTypeMetadata{Name: "SCTPShutdown", Decoder: nil}) + LayerTypeSCTPShutdownAck = gopacket.RegisterLayerType(36, gopacket.LayerTypeMetadata{Name: "SCTPShutdownAck", Decoder: nil}) + LayerTypeSCTPCookieEcho = gopacket.RegisterLayerType(37, gopacket.LayerTypeMetadata{Name: "SCTPCookieEcho", Decoder: nil}) + LayerTypeSCTPEmptyLayer = gopacket.RegisterLayerType(38, gopacket.LayerTypeMetadata{Name: "SCTPEmptyLayer", Decoder: nil}) + LayerTypeSCTPInitAck = gopacket.RegisterLayerType(39, gopacket.LayerTypeMetadata{Name: "SCTPInitAck", Decoder: nil}) + LayerTypeSCTPHeartbeatAck = gopacket.RegisterLayerType(40, gopacket.LayerTypeMetadata{Name: "SCTPHeartbeatAck", Decoder: nil}) + LayerTypeSCTPAbort = gopacket.RegisterLayerType(41, gopacket.LayerTypeMetadata{Name: "SCTPAbort", Decoder: nil}) + LayerTypeSCTPShutdownComplete = gopacket.RegisterLayerType(42, gopacket.LayerTypeMetadata{Name: "SCTPShutdownComplete", Decoder: nil}) + LayerTypeSCTPCookieAck = gopacket.RegisterLayerType(43, gopacket.LayerTypeMetadata{Name: "SCTPCookieAck", Decoder: nil}) + LayerTypeTCP = gopacket.RegisterLayerType(44, gopacket.LayerTypeMetadata{Name: "TCP", Decoder: gopacket.DecodeFunc(decodeTCP)}) + LayerTypeUDP = gopacket.RegisterLayerType(45, gopacket.LayerTypeMetadata{Name: "UDP", Decoder: gopacket.DecodeFunc(decodeUDP)}) + LayerTypeIPv6HopByHop = gopacket.RegisterLayerType(46, gopacket.LayerTypeMetadata{Name: "IPv6HopByHop", Decoder: gopacket.DecodeFunc(decodeIPv6HopByHop)}) + LayerTypeIPv6Routing = gopacket.RegisterLayerType(47, gopacket.LayerTypeMetadata{Name: "IPv6Routing", Decoder: gopacket.DecodeFunc(decodeIPv6Routing)}) + LayerTypeIPv6Fragment = gopacket.RegisterLayerType(48, gopacket.LayerTypeMetadata{Name: "IPv6Fragment", Decoder: gopacket.DecodeFunc(decodeIPv6Fragment)}) + LayerTypeIPv6Destination = gopacket.RegisterLayerType(49, gopacket.LayerTypeMetadata{Name: "IPv6Destination", Decoder: gopacket.DecodeFunc(decodeIPv6Destination)}) + LayerTypeIPSecAH = gopacket.RegisterLayerType(50, gopacket.LayerTypeMetadata{Name: "IPSecAH", Decoder: gopacket.DecodeFunc(decodeIPSecAH)}) + LayerTypeIPSecESP = gopacket.RegisterLayerType(51, gopacket.LayerTypeMetadata{Name: "IPSecESP", Decoder: gopacket.DecodeFunc(decodeIPSecESP)}) + LayerTypeUDPLite = gopacket.RegisterLayerType(52, gopacket.LayerTypeMetadata{Name: "UDPLite", Decoder: gopacket.DecodeFunc(decodeUDPLite)}) + LayerTypeFDDI = gopacket.RegisterLayerType(53, gopacket.LayerTypeMetadata{Name: "FDDI", Decoder: gopacket.DecodeFunc(decodeFDDI)}) + LayerTypeLoopback = gopacket.RegisterLayerType(54, gopacket.LayerTypeMetadata{Name: "Loopback", Decoder: gopacket.DecodeFunc(decodeLoopback)}) + LayerTypeEAP = gopacket.RegisterLayerType(55, gopacket.LayerTypeMetadata{Name: "EAP", Decoder: gopacket.DecodeFunc(decodeEAP)}) + LayerTypeEAPOL = gopacket.RegisterLayerType(56, gopacket.LayerTypeMetadata{Name: "EAPOL", Decoder: gopacket.DecodeFunc(decodeEAPOL)}) + LayerTypeICMPv6 = gopacket.RegisterLayerType(57, gopacket.LayerTypeMetadata{Name: "ICMPv6", Decoder: gopacket.DecodeFunc(decodeICMPv6)}) + LayerTypeLinkLayerDiscovery = gopacket.RegisterLayerType(58, gopacket.LayerTypeMetadata{Name: "LinkLayerDiscovery", Decoder: gopacket.DecodeFunc(decodeLinkLayerDiscovery)}) + LayerTypeCiscoDiscoveryInfo = gopacket.RegisterLayerType(59, gopacket.LayerTypeMetadata{Name: "CiscoDiscoveryInfo", Decoder: gopacket.DecodeFunc(decodeCiscoDiscoveryInfo)}) + LayerTypeLinkLayerDiscoveryInfo = gopacket.RegisterLayerType(60, gopacket.LayerTypeMetadata{Name: "LinkLayerDiscoveryInfo", Decoder: nil}) + LayerTypeNortelDiscovery = gopacket.RegisterLayerType(61, gopacket.LayerTypeMetadata{Name: "NortelDiscovery", Decoder: gopacket.DecodeFunc(decodeNortelDiscovery)}) + LayerTypeIGMP = gopacket.RegisterLayerType(62, gopacket.LayerTypeMetadata{Name: "IGMP", Decoder: gopacket.DecodeFunc(decodeIGMP)}) + LayerTypePFLog = gopacket.RegisterLayerType(63, gopacket.LayerTypeMetadata{Name: "PFLog", Decoder: gopacket.DecodeFunc(decodePFLog)}) + LayerTypeRadioTap = gopacket.RegisterLayerType(64, gopacket.LayerTypeMetadata{Name: "RadioTap", Decoder: gopacket.DecodeFunc(decodeRadioTap)}) + LayerTypeDot11 = gopacket.RegisterLayerType(65, gopacket.LayerTypeMetadata{Name: "Dot11", Decoder: gopacket.DecodeFunc(decodeDot11)}) + LayerTypeDot11Ctrl = gopacket.RegisterLayerType(66, gopacket.LayerTypeMetadata{Name: "Dot11Ctrl", Decoder: gopacket.DecodeFunc(decodeDot11Ctrl)}) + LayerTypeDot11Data = gopacket.RegisterLayerType(67, gopacket.LayerTypeMetadata{Name: "Dot11Data", Decoder: gopacket.DecodeFunc(decodeDot11Data)}) + LayerTypeDot11DataCFAck = gopacket.RegisterLayerType(68, gopacket.LayerTypeMetadata{Name: "Dot11DataCFAck", Decoder: gopacket.DecodeFunc(decodeDot11DataCFAck)}) + LayerTypeDot11DataCFPoll = gopacket.RegisterLayerType(69, gopacket.LayerTypeMetadata{Name: "Dot11DataCFPoll", Decoder: gopacket.DecodeFunc(decodeDot11DataCFPoll)}) + LayerTypeDot11DataCFAckPoll = gopacket.RegisterLayerType(70, gopacket.LayerTypeMetadata{Name: "Dot11DataCFAckPoll", Decoder: gopacket.DecodeFunc(decodeDot11DataCFAckPoll)}) + LayerTypeDot11DataNull = gopacket.RegisterLayerType(71, gopacket.LayerTypeMetadata{Name: "Dot11DataNull", Decoder: gopacket.DecodeFunc(decodeDot11DataNull)}) + LayerTypeDot11DataCFAckNoData = gopacket.RegisterLayerType(72, gopacket.LayerTypeMetadata{Name: "Dot11DataCFAck", Decoder: gopacket.DecodeFunc(decodeDot11DataCFAck)}) + LayerTypeDot11DataCFPollNoData = gopacket.RegisterLayerType(73, gopacket.LayerTypeMetadata{Name: "Dot11DataCFPoll", Decoder: gopacket.DecodeFunc(decodeDot11DataCFPoll)}) + LayerTypeDot11DataCFAckPollNoData = gopacket.RegisterLayerType(74, gopacket.LayerTypeMetadata{Name: "Dot11DataCFAckPoll", Decoder: gopacket.DecodeFunc(decodeDot11DataCFAckPoll)}) + LayerTypeDot11DataQOSData = gopacket.RegisterLayerType(75, gopacket.LayerTypeMetadata{Name: "Dot11DataQOSData", Decoder: gopacket.DecodeFunc(decodeDot11DataQOSData)}) + LayerTypeDot11DataQOSDataCFAck = gopacket.RegisterLayerType(76, gopacket.LayerTypeMetadata{Name: "Dot11DataQOSDataCFAck", Decoder: gopacket.DecodeFunc(decodeDot11DataQOSDataCFAck)}) + LayerTypeDot11DataQOSDataCFPoll = gopacket.RegisterLayerType(77, gopacket.LayerTypeMetadata{Name: "Dot11DataQOSDataCFPoll", Decoder: gopacket.DecodeFunc(decodeDot11DataQOSDataCFPoll)}) + LayerTypeDot11DataQOSDataCFAckPoll = gopacket.RegisterLayerType(78, gopacket.LayerTypeMetadata{Name: "Dot11DataQOSDataCFAckPoll", Decoder: gopacket.DecodeFunc(decodeDot11DataQOSDataCFAckPoll)}) + LayerTypeDot11DataQOSNull = gopacket.RegisterLayerType(79, gopacket.LayerTypeMetadata{Name: "Dot11DataQOSNull", Decoder: gopacket.DecodeFunc(decodeDot11DataQOSNull)}) + LayerTypeDot11DataQOSCFPollNoData = gopacket.RegisterLayerType(80, gopacket.LayerTypeMetadata{Name: "Dot11DataQOSCFPoll", Decoder: gopacket.DecodeFunc(decodeDot11DataQOSCFPollNoData)}) + LayerTypeDot11DataQOSCFAckPollNoData = gopacket.RegisterLayerType(81, gopacket.LayerTypeMetadata{Name: "Dot11DataQOSCFAckPoll", Decoder: gopacket.DecodeFunc(decodeDot11DataQOSCFAckPollNoData)}) + LayerTypeDot11InformationElement = gopacket.RegisterLayerType(82, gopacket.LayerTypeMetadata{Name: "Dot11InformationElement", Decoder: gopacket.DecodeFunc(decodeDot11InformationElement)}) + LayerTypeDot11CtrlCTS = gopacket.RegisterLayerType(83, gopacket.LayerTypeMetadata{Name: "Dot11CtrlCTS", Decoder: gopacket.DecodeFunc(decodeDot11CtrlCTS)}) + LayerTypeDot11CtrlRTS = gopacket.RegisterLayerType(84, gopacket.LayerTypeMetadata{Name: "Dot11CtrlRTS", Decoder: gopacket.DecodeFunc(decodeDot11CtrlRTS)}) + LayerTypeDot11CtrlBlockAckReq = gopacket.RegisterLayerType(85, gopacket.LayerTypeMetadata{Name: "Dot11CtrlBlockAckReq", Decoder: gopacket.DecodeFunc(decodeDot11CtrlBlockAckReq)}) + LayerTypeDot11CtrlBlockAck = gopacket.RegisterLayerType(86, gopacket.LayerTypeMetadata{Name: "Dot11CtrlBlockAck", Decoder: gopacket.DecodeFunc(decodeDot11CtrlBlockAck)}) + LayerTypeDot11CtrlPowersavePoll = gopacket.RegisterLayerType(87, gopacket.LayerTypeMetadata{Name: "Dot11CtrlPowersavePoll", Decoder: gopacket.DecodeFunc(decodeDot11CtrlPowersavePoll)}) + LayerTypeDot11CtrlAck = gopacket.RegisterLayerType(88, gopacket.LayerTypeMetadata{Name: "Dot11CtrlAck", Decoder: gopacket.DecodeFunc(decodeDot11CtrlAck)}) + LayerTypeDot11CtrlCFEnd = gopacket.RegisterLayerType(89, gopacket.LayerTypeMetadata{Name: "Dot11CtrlCFEnd", Decoder: gopacket.DecodeFunc(decodeDot11CtrlCFEnd)}) + LayerTypeDot11CtrlCFEndAck = gopacket.RegisterLayerType(90, gopacket.LayerTypeMetadata{Name: "Dot11CtrlCFEndAck", Decoder: gopacket.DecodeFunc(decodeDot11CtrlCFEndAck)}) + LayerTypeDot11MgmtAssociationReq = gopacket.RegisterLayerType(91, gopacket.LayerTypeMetadata{Name: "Dot11MgmtAssociationReq", Decoder: gopacket.DecodeFunc(decodeDot11MgmtAssociationReq)}) + LayerTypeDot11MgmtAssociationResp = gopacket.RegisterLayerType(92, gopacket.LayerTypeMetadata{Name: "Dot11MgmtAssociationResp", Decoder: gopacket.DecodeFunc(decodeDot11MgmtAssociationResp)}) + LayerTypeDot11MgmtReassociationReq = gopacket.RegisterLayerType(93, gopacket.LayerTypeMetadata{Name: "Dot11MgmtReassociationReq", Decoder: gopacket.DecodeFunc(decodeDot11MgmtReassociationReq)}) + LayerTypeDot11MgmtReassociationResp = gopacket.RegisterLayerType(94, gopacket.LayerTypeMetadata{Name: "Dot11MgmtReassociationResp", Decoder: gopacket.DecodeFunc(decodeDot11MgmtReassociationResp)}) + LayerTypeDot11MgmtProbeReq = gopacket.RegisterLayerType(95, gopacket.LayerTypeMetadata{Name: "Dot11MgmtProbeReq", Decoder: gopacket.DecodeFunc(decodeDot11MgmtProbeReq)}) + LayerTypeDot11MgmtProbeResp = gopacket.RegisterLayerType(96, gopacket.LayerTypeMetadata{Name: "Dot11MgmtProbeResp", Decoder: gopacket.DecodeFunc(decodeDot11MgmtProbeResp)}) + LayerTypeDot11MgmtMeasurementPilot = gopacket.RegisterLayerType(97, gopacket.LayerTypeMetadata{Name: "Dot11MgmtMeasurementPilot", Decoder: gopacket.DecodeFunc(decodeDot11MgmtMeasurementPilot)}) + LayerTypeDot11MgmtBeacon = gopacket.RegisterLayerType(98, gopacket.LayerTypeMetadata{Name: "Dot11MgmtBeacon", Decoder: gopacket.DecodeFunc(decodeDot11MgmtBeacon)}) + LayerTypeDot11MgmtATIM = gopacket.RegisterLayerType(99, gopacket.LayerTypeMetadata{Name: "Dot11MgmtATIM", Decoder: gopacket.DecodeFunc(decodeDot11MgmtATIM)}) + LayerTypeDot11MgmtDisassociation = gopacket.RegisterLayerType(100, gopacket.LayerTypeMetadata{Name: "Dot11MgmtDisassociation", Decoder: gopacket.DecodeFunc(decodeDot11MgmtDisassociation)}) + LayerTypeDot11MgmtAuthentication = gopacket.RegisterLayerType(101, gopacket.LayerTypeMetadata{Name: "Dot11MgmtAuthentication", Decoder: gopacket.DecodeFunc(decodeDot11MgmtAuthentication)}) + LayerTypeDot11MgmtDeauthentication = gopacket.RegisterLayerType(102, gopacket.LayerTypeMetadata{Name: "Dot11MgmtDeauthentication", Decoder: gopacket.DecodeFunc(decodeDot11MgmtDeauthentication)}) + LayerTypeDot11MgmtAction = gopacket.RegisterLayerType(103, gopacket.LayerTypeMetadata{Name: "Dot11MgmtAction", Decoder: gopacket.DecodeFunc(decodeDot11MgmtAction)}) + LayerTypeDot11MgmtActionNoAck = gopacket.RegisterLayerType(104, gopacket.LayerTypeMetadata{Name: "Dot11MgmtActionNoAck", Decoder: gopacket.DecodeFunc(decodeDot11MgmtActionNoAck)}) + LayerTypeDot11MgmtArubaWLAN = gopacket.RegisterLayerType(105, gopacket.LayerTypeMetadata{Name: "Dot11MgmtArubaWLAN", Decoder: gopacket.DecodeFunc(decodeDot11MgmtArubaWLAN)}) + LayerTypeDot11WEP = gopacket.RegisterLayerType(106, gopacket.LayerTypeMetadata{Name: "Dot11WEP", Decoder: gopacket.DecodeFunc(decodeDot11WEP)}) + LayerTypeDNS = gopacket.RegisterLayerType(107, gopacket.LayerTypeMetadata{Name: "DNS", Decoder: gopacket.DecodeFunc(decodeDNS)}) + LayerTypeUSB = gopacket.RegisterLayerType(108, gopacket.LayerTypeMetadata{Name: "USB", Decoder: gopacket.DecodeFunc(decodeUSB)}) + LayerTypeUSBRequestBlockSetup = gopacket.RegisterLayerType(109, gopacket.LayerTypeMetadata{Name: "USBRequestBlockSetup", Decoder: gopacket.DecodeFunc(decodeUSBRequestBlockSetup)}) + LayerTypeUSBControl = gopacket.RegisterLayerType(110, gopacket.LayerTypeMetadata{Name: "USBControl", Decoder: gopacket.DecodeFunc(decodeUSBControl)}) + LayerTypeUSBInterrupt = gopacket.RegisterLayerType(111, gopacket.LayerTypeMetadata{Name: "USBInterrupt", Decoder: gopacket.DecodeFunc(decodeUSBInterrupt)}) + LayerTypeUSBBulk = gopacket.RegisterLayerType(112, gopacket.LayerTypeMetadata{Name: "USBBulk", Decoder: gopacket.DecodeFunc(decodeUSBBulk)}) + LayerTypeLinuxSLL = gopacket.RegisterLayerType(113, gopacket.LayerTypeMetadata{Name: "Linux SLL", Decoder: gopacket.DecodeFunc(decodeLinuxSLL)}) + LayerTypeSFlow = gopacket.RegisterLayerType(114, gopacket.LayerTypeMetadata{Name: "SFlow", Decoder: gopacket.DecodeFunc(decodeSFlow)}) + LayerTypePrismHeader = gopacket.RegisterLayerType(115, gopacket.LayerTypeMetadata{Name: "Prism monitor mode header", Decoder: gopacket.DecodeFunc(decodePrismHeader)}) + LayerTypeVXLAN = gopacket.RegisterLayerType(116, gopacket.LayerTypeMetadata{Name: "VXLAN", Decoder: gopacket.DecodeFunc(decodeVXLAN)}) + LayerTypeNTP = gopacket.RegisterLayerType(117, gopacket.LayerTypeMetadata{Name: "NTP", Decoder: gopacket.DecodeFunc(decodeNTP)}) + LayerTypeDHCPv4 = gopacket.RegisterLayerType(118, gopacket.LayerTypeMetadata{Name: "DHCPv4", Decoder: gopacket.DecodeFunc(decodeDHCPv4)}) + LayerTypeVRRP = gopacket.RegisterLayerType(119, gopacket.LayerTypeMetadata{Name: "VRRP", Decoder: gopacket.DecodeFunc(decodeVRRP)}) + LayerTypeGeneve = gopacket.RegisterLayerType(120, gopacket.LayerTypeMetadata{Name: "Geneve", Decoder: gopacket.DecodeFunc(decodeGeneve)}) + LayerTypeSTP = gopacket.RegisterLayerType(121, gopacket.LayerTypeMetadata{Name: "STP", Decoder: gopacket.DecodeFunc(decodeSTP)}) + LayerTypeBFD = gopacket.RegisterLayerType(122, gopacket.LayerTypeMetadata{Name: "BFD", Decoder: gopacket.DecodeFunc(decodeBFD)}) + LayerTypeOSPF = gopacket.RegisterLayerType(123, gopacket.LayerTypeMetadata{Name: "OSPF", Decoder: gopacket.DecodeFunc(decodeOSPF)}) + LayerTypeICMPv6RouterSolicitation = gopacket.RegisterLayerType(124, gopacket.LayerTypeMetadata{Name: "ICMPv6RouterSolicitation", Decoder: gopacket.DecodeFunc(decodeICMPv6RouterSolicitation)}) + LayerTypeICMPv6RouterAdvertisement = gopacket.RegisterLayerType(125, gopacket.LayerTypeMetadata{Name: "ICMPv6RouterAdvertisement", Decoder: gopacket.DecodeFunc(decodeICMPv6RouterAdvertisement)}) + LayerTypeICMPv6NeighborSolicitation = gopacket.RegisterLayerType(126, gopacket.LayerTypeMetadata{Name: "ICMPv6NeighborSolicitation", Decoder: gopacket.DecodeFunc(decodeICMPv6NeighborSolicitation)}) + LayerTypeICMPv6NeighborAdvertisement = gopacket.RegisterLayerType(127, gopacket.LayerTypeMetadata{Name: "ICMPv6NeighborAdvertisement", Decoder: gopacket.DecodeFunc(decodeICMPv6NeighborAdvertisement)}) + LayerTypeICMPv6Redirect = gopacket.RegisterLayerType(128, gopacket.LayerTypeMetadata{Name: "ICMPv6Redirect", Decoder: gopacket.DecodeFunc(decodeICMPv6Redirect)}) + LayerTypeGTPv1U = gopacket.RegisterLayerType(129, gopacket.LayerTypeMetadata{Name: "GTPv1U", Decoder: gopacket.DecodeFunc(decodeGTPv1u)}) + LayerTypeEAPOLKey = gopacket.RegisterLayerType(130, gopacket.LayerTypeMetadata{Name: "EAPOLKey", Decoder: gopacket.DecodeFunc(decodeEAPOLKey)}) + LayerTypeLCM = gopacket.RegisterLayerType(131, gopacket.LayerTypeMetadata{Name: "LCM", Decoder: gopacket.DecodeFunc(decodeLCM)}) + LayerTypeICMPv6Echo = gopacket.RegisterLayerType(132, gopacket.LayerTypeMetadata{Name: "ICMPv6Echo", Decoder: gopacket.DecodeFunc(decodeICMPv6Echo)}) + LayerTypeSIP = gopacket.RegisterLayerType(133, gopacket.LayerTypeMetadata{Name: "SIP", Decoder: gopacket.DecodeFunc(decodeSIP)}) + LayerTypeDHCPv6 = gopacket.RegisterLayerType(134, gopacket.LayerTypeMetadata{Name: "DHCPv6", Decoder: gopacket.DecodeFunc(decodeDHCPv6)}) + LayerTypeMLDv1MulticastListenerReport = gopacket.RegisterLayerType(135, gopacket.LayerTypeMetadata{Name: "MLDv1MulticastListenerReport", Decoder: gopacket.DecodeFunc(decodeMLDv1MulticastListenerReport)}) + LayerTypeMLDv1MulticastListenerDone = gopacket.RegisterLayerType(136, gopacket.LayerTypeMetadata{Name: "MLDv1MulticastListenerDone", Decoder: gopacket.DecodeFunc(decodeMLDv1MulticastListenerDone)}) + LayerTypeMLDv1MulticastListenerQuery = gopacket.RegisterLayerType(137, gopacket.LayerTypeMetadata{Name: "MLDv1MulticastListenerQuery", Decoder: gopacket.DecodeFunc(decodeMLDv1MulticastListenerQuery)}) + LayerTypeMLDv2MulticastListenerReport = gopacket.RegisterLayerType(138, gopacket.LayerTypeMetadata{Name: "MLDv2MulticastListenerReport", Decoder: gopacket.DecodeFunc(decodeMLDv2MulticastListenerReport)}) + LayerTypeMLDv2MulticastListenerQuery = gopacket.RegisterLayerType(139, gopacket.LayerTypeMetadata{Name: "MLDv2MulticastListenerQuery", Decoder: gopacket.DecodeFunc(decodeMLDv2MulticastListenerQuery)}) + LayerTypeTLS = gopacket.RegisterLayerType(140, gopacket.LayerTypeMetadata{Name: "TLS", Decoder: gopacket.DecodeFunc(decodeTLS)}) + LayerTypeModbusTCP = gopacket.RegisterLayerType(141, gopacket.LayerTypeMetadata{Name: "ModbusTCP", Decoder: gopacket.DecodeFunc(decodeModbusTCP)}) + LayerTypeRMCP = gopacket.RegisterLayerType(142, gopacket.LayerTypeMetadata{Name: "RMCP", Decoder: gopacket.DecodeFunc(decodeRMCP)}) + LayerTypeASF = gopacket.RegisterLayerType(143, gopacket.LayerTypeMetadata{Name: "ASF", Decoder: gopacket.DecodeFunc(decodeASF)}) + LayerTypeASFPresencePong = gopacket.RegisterLayerType(144, gopacket.LayerTypeMetadata{Name: "ASFPresencePong", Decoder: gopacket.DecodeFunc(decodeASFPresencePong)}) + LayerTypeERSPANII = gopacket.RegisterLayerType(145, gopacket.LayerTypeMetadata{Name: "ERSPAN Type II", Decoder: gopacket.DecodeFunc(decodeERSPANII)}) + LayerTypeRADIUS = gopacket.RegisterLayerType(146, gopacket.LayerTypeMetadata{Name: "RADIUS", Decoder: gopacket.DecodeFunc(decodeRADIUS)}) +) + +var ( + // LayerClassIPNetwork contains TCP/IP network layer types. + LayerClassIPNetwork = gopacket.NewLayerClass([]gopacket.LayerType{ + LayerTypeIPv4, + LayerTypeIPv6, + }) + // LayerClassIPTransport contains TCP/IP transport layer types. + LayerClassIPTransport = gopacket.NewLayerClass([]gopacket.LayerType{ + LayerTypeTCP, + LayerTypeUDP, + LayerTypeSCTP, + }) + // LayerClassIPControl contains TCP/IP control protocols. + LayerClassIPControl = gopacket.NewLayerClass([]gopacket.LayerType{ + LayerTypeICMPv4, + LayerTypeICMPv6, + }) + // LayerClassSCTPChunk contains SCTP chunk types (not the top-level SCTP + // layer). + LayerClassSCTPChunk = gopacket.NewLayerClass([]gopacket.LayerType{ + LayerTypeSCTPUnknownChunkType, + LayerTypeSCTPData, + LayerTypeSCTPInit, + LayerTypeSCTPSack, + LayerTypeSCTPHeartbeat, + LayerTypeSCTPError, + LayerTypeSCTPShutdown, + LayerTypeSCTPShutdownAck, + LayerTypeSCTPCookieEcho, + LayerTypeSCTPEmptyLayer, + LayerTypeSCTPInitAck, + LayerTypeSCTPHeartbeatAck, + LayerTypeSCTPAbort, + LayerTypeSCTPShutdownComplete, + LayerTypeSCTPCookieAck, + }) + // LayerClassIPv6Extension contains IPv6 extension headers. + LayerClassIPv6Extension = gopacket.NewLayerClass([]gopacket.LayerType{ + LayerTypeIPv6HopByHop, + LayerTypeIPv6Routing, + LayerTypeIPv6Fragment, + LayerTypeIPv6Destination, + }) + LayerClassIPSec = gopacket.NewLayerClass([]gopacket.LayerType{ + LayerTypeIPSecAH, + LayerTypeIPSecESP, + }) + // LayerClassICMPv6NDP contains ICMPv6 neighbor discovery protocol + // messages. + LayerClassICMPv6NDP = gopacket.NewLayerClass([]gopacket.LayerType{ + LayerTypeICMPv6RouterSolicitation, + LayerTypeICMPv6RouterAdvertisement, + LayerTypeICMPv6NeighborSolicitation, + LayerTypeICMPv6NeighborAdvertisement, + LayerTypeICMPv6Redirect, + }) + // LayerClassMLDv1 contains multicast listener discovery protocol + LayerClassMLDv1 = gopacket.NewLayerClass([]gopacket.LayerType{ + LayerTypeMLDv1MulticastListenerQuery, + LayerTypeMLDv1MulticastListenerReport, + LayerTypeMLDv1MulticastListenerDone, + }) + // LayerClassMLDv2 contains multicast listener discovery protocol v2 + LayerClassMLDv2 = gopacket.NewLayerClass([]gopacket.LayerType{ + LayerTypeMLDv1MulticastListenerReport, + LayerTypeMLDv1MulticastListenerDone, + LayerTypeMLDv2MulticastListenerReport, + LayerTypeMLDv1MulticastListenerQuery, + LayerTypeMLDv2MulticastListenerQuery, + }) +) diff --git a/backend/vendor/github.com/google/gopacket/layers/lcm.go b/backend/vendor/github.com/google/gopacket/layers/lcm.go new file mode 100644 index 0000000..58a4b82 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/lcm.go @@ -0,0 +1,218 @@ +// Copyright 2018 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + + "github.com/google/gopacket" +) + +const ( + // LCMShortHeaderMagic is the LCM small message header magic number + LCMShortHeaderMagic uint32 = 0x4c433032 + // LCMFragmentedHeaderMagic is the LCM fragmented message header magic number + LCMFragmentedHeaderMagic uint32 = 0x4c433033 +) + +// LCM (Lightweight Communications and Marshalling) is a set of libraries and +// tools for message passing and data marshalling, targeted at real-time systems +// where high-bandwidth and low latency are critical. It provides a +// publish/subscribe message passing model and automatic +// marshalling/unmarshalling code generation with bindings for applications in a +// variety of programming languages. +// +// References +// https://lcm-proj.github.io/ +// https://github.com/lcm-proj/lcm +type LCM struct { + // Common (short & fragmented header) fields + Magic uint32 + SequenceNumber uint32 + // Fragmented header only fields + PayloadSize uint32 + FragmentOffset uint32 + FragmentNumber uint16 + TotalFragments uint16 + // Common field + ChannelName string + // Gopacket helper fields + Fragmented bool + fingerprint LCMFingerprint + contents []byte + payload []byte +} + +// LCMFingerprint is the type of a LCM fingerprint. +type LCMFingerprint uint64 + +var ( + // lcmLayerTypes contains a map of all LCM fingerprints that we support and + // their LayerType + lcmLayerTypes = map[LCMFingerprint]gopacket.LayerType{} + layerTypeIndex = 1001 +) + +// RegisterLCMLayerType allows users to register decoders for the underlying +// LCM payload. This is done based on the fingerprint that every LCM message +// contains and which identifies it uniquely. If num is not the zero value it +// will be used when registering with RegisterLayerType towards gopacket, +// otherwise an incremental value starting from 1001 will be used. +func RegisterLCMLayerType(num int, name string, fingerprint LCMFingerprint, + decoder gopacket.Decoder) gopacket.LayerType { + metadata := gopacket.LayerTypeMetadata{Name: name, Decoder: decoder} + + if num == 0 { + num = layerTypeIndex + layerTypeIndex++ + } + + lcmLayerTypes[fingerprint] = gopacket.RegisterLayerType(num, metadata) + + return lcmLayerTypes[fingerprint] +} + +// SupportedLCMFingerprints returns a slice of all LCM fingerprints that has +// been registered so far. +func SupportedLCMFingerprints() []LCMFingerprint { + fingerprints := make([]LCMFingerprint, 0, len(lcmLayerTypes)) + for fp := range lcmLayerTypes { + fingerprints = append(fingerprints, fp) + } + return fingerprints +} + +// GetLCMLayerType returns the underlying LCM message's LayerType. +// This LayerType has to be registered by using RegisterLCMLayerType. +func GetLCMLayerType(fingerprint LCMFingerprint) gopacket.LayerType { + layerType, ok := lcmLayerTypes[fingerprint] + if !ok { + return gopacket.LayerTypePayload + } + + return layerType +} + +func decodeLCM(data []byte, p gopacket.PacketBuilder) error { + lcm := &LCM{} + + err := lcm.DecodeFromBytes(data, p) + if err != nil { + return err + } + + p.AddLayer(lcm) + p.SetApplicationLayer(lcm) + + return p.NextDecoder(lcm.NextLayerType()) +} + +// DecodeFromBytes decodes the given bytes into this layer. +func (lcm *LCM) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 8 { + df.SetTruncated() + return errors.New("LCM < 8 bytes") + } + offset := 0 + + lcm.Magic = binary.BigEndian.Uint32(data[offset:4]) + offset += 4 + + if lcm.Magic != LCMShortHeaderMagic && lcm.Magic != LCMFragmentedHeaderMagic { + return fmt.Errorf("Received LCM header magic %v does not match know "+ + "LCM magic numbers. Dropping packet.", lcm.Magic) + } + + lcm.SequenceNumber = binary.BigEndian.Uint32(data[offset:8]) + offset += 4 + + if lcm.Magic == LCMFragmentedHeaderMagic { + lcm.Fragmented = true + + lcm.PayloadSize = binary.BigEndian.Uint32(data[offset : offset+4]) + offset += 4 + + lcm.FragmentOffset = binary.BigEndian.Uint32(data[offset : offset+4]) + offset += 4 + + lcm.FragmentNumber = binary.BigEndian.Uint16(data[offset : offset+2]) + offset += 2 + + lcm.TotalFragments = binary.BigEndian.Uint16(data[offset : offset+2]) + offset += 2 + } else { + lcm.Fragmented = false + } + + if !lcm.Fragmented || (lcm.Fragmented && lcm.FragmentNumber == 0) { + buffer := make([]byte, 0) + for _, b := range data[offset:] { + offset++ + + if b == 0 { + break + } + + buffer = append(buffer, b) + } + + lcm.ChannelName = string(buffer) + } + + lcm.fingerprint = LCMFingerprint( + binary.BigEndian.Uint64(data[offset : offset+8])) + + lcm.contents = data[:offset] + lcm.payload = data[offset:] + + return nil +} + +// CanDecode returns a set of layers that LCM objects can decode. +// As LCM objects can only decode the LCM layer, we just return that layer. +func (lcm LCM) CanDecode() gopacket.LayerClass { + return LayerTypeLCM +} + +// NextLayerType specifies the LCM payload layer type following this header. +// As LCM packets are serialized structs with uniq fingerprints for each uniq +// combination of data types, lookup of correct layer type is based on that +// fingerprint. +func (lcm LCM) NextLayerType() gopacket.LayerType { + if !lcm.Fragmented || (lcm.Fragmented && lcm.FragmentNumber == 0) { + return GetLCMLayerType(lcm.fingerprint) + } + + return gopacket.LayerTypeFragment +} + +// LayerType returns LayerTypeLCM +func (lcm LCM) LayerType() gopacket.LayerType { + return LayerTypeLCM +} + +// LayerContents returns the contents of the LCM header. +func (lcm LCM) LayerContents() []byte { + return lcm.contents +} + +// LayerPayload returns the payload following this LCM header. +func (lcm LCM) LayerPayload() []byte { + return lcm.payload +} + +// Payload returns the payload following this LCM header. +func (lcm LCM) Payload() []byte { + return lcm.LayerPayload() +} + +// Fingerprint returns the LCM fingerprint of the underlying message. +func (lcm LCM) Fingerprint() LCMFingerprint { + return lcm.fingerprint +} diff --git a/backend/vendor/github.com/google/gopacket/layers/linux_sll.go b/backend/vendor/github.com/google/gopacket/layers/linux_sll.go new file mode 100644 index 0000000..85a4f8b --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/linux_sll.go @@ -0,0 +1,98 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + "net" + + "github.com/google/gopacket" +) + +type LinuxSLLPacketType uint16 + +const ( + LinuxSLLPacketTypeHost LinuxSLLPacketType = 0 // To us + LinuxSLLPacketTypeBroadcast LinuxSLLPacketType = 1 // To all + LinuxSLLPacketTypeMulticast LinuxSLLPacketType = 2 // To group + LinuxSLLPacketTypeOtherhost LinuxSLLPacketType = 3 // To someone else + LinuxSLLPacketTypeOutgoing LinuxSLLPacketType = 4 // Outgoing of any type + // These ones are invisible by user level + LinuxSLLPacketTypeLoopback LinuxSLLPacketType = 5 // MC/BRD frame looped back + LinuxSLLPacketTypeFastroute LinuxSLLPacketType = 6 // Fastrouted frame +) + +func (l LinuxSLLPacketType) String() string { + switch l { + case LinuxSLLPacketTypeHost: + return "host" + case LinuxSLLPacketTypeBroadcast: + return "broadcast" + case LinuxSLLPacketTypeMulticast: + return "multicast" + case LinuxSLLPacketTypeOtherhost: + return "otherhost" + case LinuxSLLPacketTypeOutgoing: + return "outgoing" + case LinuxSLLPacketTypeLoopback: + return "loopback" + case LinuxSLLPacketTypeFastroute: + return "fastroute" + } + return fmt.Sprintf("Unknown(%d)", int(l)) +} + +type LinuxSLL struct { + BaseLayer + PacketType LinuxSLLPacketType + AddrLen uint16 + Addr net.HardwareAddr + EthernetType EthernetType + AddrType uint16 +} + +// LayerType returns LayerTypeLinuxSLL. +func (sll *LinuxSLL) LayerType() gopacket.LayerType { return LayerTypeLinuxSLL } + +func (sll *LinuxSLL) CanDecode() gopacket.LayerClass { + return LayerTypeLinuxSLL +} + +func (sll *LinuxSLL) LinkFlow() gopacket.Flow { + return gopacket.NewFlow(EndpointMAC, sll.Addr, nil) +} + +func (sll *LinuxSLL) NextLayerType() gopacket.LayerType { + return sll.EthernetType.LayerType() +} + +func (sll *LinuxSLL) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 16 { + return errors.New("Linux SLL packet too small") + } + sll.PacketType = LinuxSLLPacketType(binary.BigEndian.Uint16(data[0:2])) + sll.AddrType = binary.BigEndian.Uint16(data[2:4]) + sll.AddrLen = binary.BigEndian.Uint16(data[4:6]) + + sll.Addr = net.HardwareAddr(data[6 : sll.AddrLen+6]) + sll.EthernetType = EthernetType(binary.BigEndian.Uint16(data[14:16])) + sll.BaseLayer = BaseLayer{data[:16], data[16:]} + + return nil +} + +func decodeLinuxSLL(data []byte, p gopacket.PacketBuilder) error { + sll := &LinuxSLL{} + if err := sll.DecodeFromBytes(data, p); err != nil { + return err + } + p.AddLayer(sll) + p.SetLinkLayer(sll) + return p.NextDecoder(sll.EthernetType) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/llc.go b/backend/vendor/github.com/google/gopacket/layers/llc.go new file mode 100644 index 0000000..cad6803 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/llc.go @@ -0,0 +1,193 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + + "github.com/google/gopacket" +) + +// LLC is the layer used for 802.2 Logical Link Control headers. +// See http://standards.ieee.org/getieee802/download/802.2-1998.pdf +type LLC struct { + BaseLayer + DSAP uint8 + IG bool // true means group, false means individual + SSAP uint8 + CR bool // true means response, false means command + Control uint16 +} + +// LayerType returns gopacket.LayerTypeLLC. +func (l *LLC) LayerType() gopacket.LayerType { return LayerTypeLLC } + +// DecodeFromBytes decodes the given bytes into this layer. +func (l *LLC) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 3 { + return errors.New("LLC header too small") + } + l.DSAP = data[0] & 0xFE + l.IG = data[0]&0x1 != 0 + l.SSAP = data[1] & 0xFE + l.CR = data[1]&0x1 != 0 + l.Control = uint16(data[2]) + + if l.Control&0x1 == 0 || l.Control&0x3 == 0x1 { + if len(data) < 4 { + return errors.New("LLC header too small") + } + l.Control = l.Control<<8 | uint16(data[3]) + l.Contents = data[:4] + l.Payload = data[4:] + } else { + l.Contents = data[:3] + l.Payload = data[3:] + } + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (l *LLC) CanDecode() gopacket.LayerClass { + return LayerTypeLLC +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (l *LLC) NextLayerType() gopacket.LayerType { + switch { + case l.DSAP == 0xAA && l.SSAP == 0xAA: + return LayerTypeSNAP + case l.DSAP == 0x42 && l.SSAP == 0x42: + return LayerTypeSTP + } + return gopacket.LayerTypeZero // Not implemented +} + +// SNAP is used inside LLC. See +// http://standards.ieee.org/getieee802/download/802-2001.pdf. +// From http://en.wikipedia.org/wiki/Subnetwork_Access_Protocol: +// "[T]he Subnetwork Access Protocol (SNAP) is a mechanism for multiplexing, +// on networks using IEEE 802.2 LLC, more protocols than can be distinguished +// by the 8-bit 802.2 Service Access Point (SAP) fields." +type SNAP struct { + BaseLayer + OrganizationalCode []byte + Type EthernetType +} + +// LayerType returns gopacket.LayerTypeSNAP. +func (s *SNAP) LayerType() gopacket.LayerType { return LayerTypeSNAP } + +// DecodeFromBytes decodes the given bytes into this layer. +func (s *SNAP) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 5 { + return errors.New("SNAP header too small") + } + s.OrganizationalCode = data[:3] + s.Type = EthernetType(binary.BigEndian.Uint16(data[3:5])) + s.BaseLayer = BaseLayer{data[:5], data[5:]} + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (s *SNAP) CanDecode() gopacket.LayerClass { + return LayerTypeSNAP +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (s *SNAP) NextLayerType() gopacket.LayerType { + // See BUG(gconnel) in decodeSNAP + return s.Type.LayerType() +} + +func decodeLLC(data []byte, p gopacket.PacketBuilder) error { + l := &LLC{} + err := l.DecodeFromBytes(data, p) + if err != nil { + return err + } + p.AddLayer(l) + return p.NextDecoder(l.NextLayerType()) +} + +func decodeSNAP(data []byte, p gopacket.PacketBuilder) error { + s := &SNAP{} + err := s.DecodeFromBytes(data, p) + if err != nil { + return err + } + p.AddLayer(s) + // BUG(gconnell): When decoding SNAP, we treat the SNAP type as an Ethernet + // type. This may not actually be an ethernet type in all cases, + // depending on the organizational code. Right now, we don't check. + return p.NextDecoder(s.Type) +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (l *LLC) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + var igFlag, crFlag byte + var length int + + if l.Control&0xFF00 != 0 { + length = 4 + } else { + length = 3 + } + + if l.DSAP&0x1 != 0 { + return errors.New("DSAP value invalid, should not include IG flag bit") + } + + if l.SSAP&0x1 != 0 { + return errors.New("SSAP value invalid, should not include CR flag bit") + } + + if buf, err := b.PrependBytes(length); err != nil { + return err + } else { + igFlag = 0 + if l.IG { + igFlag = 0x1 + } + + crFlag = 0 + if l.CR { + crFlag = 0x1 + } + + buf[0] = l.DSAP + igFlag + buf[1] = l.SSAP + crFlag + + if length == 4 { + buf[2] = uint8(l.Control >> 8) + buf[3] = uint8(l.Control) + } else { + buf[2] = uint8(l.Control) + } + } + + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (s *SNAP) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + if buf, err := b.PrependBytes(5); err != nil { + return err + } else { + buf[0] = s.OrganizationalCode[0] + buf[1] = s.OrganizationalCode[1] + buf[2] = s.OrganizationalCode[2] + binary.BigEndian.PutUint16(buf[3:5], uint16(s.Type)) + } + + return nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/lldp.go b/backend/vendor/github.com/google/gopacket/layers/lldp.go new file mode 100644 index 0000000..16a5bba --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/lldp.go @@ -0,0 +1,1603 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + + "github.com/google/gopacket" +) + +// LLDPTLVType is the type of each TLV value in a LinkLayerDiscovery packet. +type LLDPTLVType byte + +const ( + LLDPTLVEnd LLDPTLVType = 0 + LLDPTLVChassisID LLDPTLVType = 1 + LLDPTLVPortID LLDPTLVType = 2 + LLDPTLVTTL LLDPTLVType = 3 + LLDPTLVPortDescription LLDPTLVType = 4 + LLDPTLVSysName LLDPTLVType = 5 + LLDPTLVSysDescription LLDPTLVType = 6 + LLDPTLVSysCapabilities LLDPTLVType = 7 + LLDPTLVMgmtAddress LLDPTLVType = 8 + LLDPTLVOrgSpecific LLDPTLVType = 127 +) + +// LinkLayerDiscoveryValue is a TLV value inside a LinkLayerDiscovery packet layer. +type LinkLayerDiscoveryValue struct { + Type LLDPTLVType + Length uint16 + Value []byte +} + +func (c *LinkLayerDiscoveryValue) len() int { + return 0 +} + +// LLDPChassisIDSubType specifies the value type for a single LLDPChassisID.ID +type LLDPChassisIDSubType byte + +// LLDP Chassis Types +const ( + LLDPChassisIDSubTypeReserved LLDPChassisIDSubType = 0 + LLDPChassisIDSubTypeChassisComp LLDPChassisIDSubType = 1 + LLDPChassisIDSubtypeIfaceAlias LLDPChassisIDSubType = 2 + LLDPChassisIDSubTypePortComp LLDPChassisIDSubType = 3 + LLDPChassisIDSubTypeMACAddr LLDPChassisIDSubType = 4 + LLDPChassisIDSubTypeNetworkAddr LLDPChassisIDSubType = 5 + LLDPChassisIDSubtypeIfaceName LLDPChassisIDSubType = 6 + LLDPChassisIDSubTypeLocal LLDPChassisIDSubType = 7 +) + +type LLDPChassisID struct { + Subtype LLDPChassisIDSubType + ID []byte +} + +func (c *LLDPChassisID) serialize() []byte { + + var buf = make([]byte, c.serializedLen()) + idLen := uint16(LLDPTLVChassisID)<<9 | uint16(len(c.ID)+1) //id should take 7 bits, length should take 9 bits, +1 for subtype + binary.BigEndian.PutUint16(buf[0:2], idLen) + buf[2] = byte(c.Subtype) + copy(buf[3:], c.ID) + return buf +} + +func (c *LLDPChassisID) serializedLen() int { + return len(c.ID) + 3 // +2 for id and length, +1 for subtype +} + +// LLDPPortIDSubType specifies the value type for a single LLDPPortID.ID +type LLDPPortIDSubType byte + +// LLDP PortID types +const ( + LLDPPortIDSubtypeReserved LLDPPortIDSubType = 0 + LLDPPortIDSubtypeIfaceAlias LLDPPortIDSubType = 1 + LLDPPortIDSubtypePortComp LLDPPortIDSubType = 2 + LLDPPortIDSubtypeMACAddr LLDPPortIDSubType = 3 + LLDPPortIDSubtypeNetworkAddr LLDPPortIDSubType = 4 + LLDPPortIDSubtypeIfaceName LLDPPortIDSubType = 5 + LLDPPortIDSubtypeAgentCircuitID LLDPPortIDSubType = 6 + LLDPPortIDSubtypeLocal LLDPPortIDSubType = 7 +) + +type LLDPPortID struct { + Subtype LLDPPortIDSubType + ID []byte +} + +func (c *LLDPPortID) serialize() []byte { + + var buf = make([]byte, c.serializedLen()) + idLen := uint16(LLDPTLVPortID)<<9 | uint16(len(c.ID)+1) //id should take 7 bits, length should take 9 bits, +1 for subtype + binary.BigEndian.PutUint16(buf[0:2], idLen) + buf[2] = byte(c.Subtype) + copy(buf[3:], c.ID) + return buf +} + +func (c *LLDPPortID) serializedLen() int { + return len(c.ID) + 3 // +2 for id and length, +1 for subtype +} + +// LinkLayerDiscovery is a packet layer containing the LinkLayer Discovery Protocol. +// See http:http://standards.ieee.org/getieee802/download/802.1AB-2009.pdf +// ChassisID, PortID and TTL are mandatory TLV's. Other values can be decoded +// with DecodeValues() +type LinkLayerDiscovery struct { + BaseLayer + ChassisID LLDPChassisID + PortID LLDPPortID + TTL uint16 + Values []LinkLayerDiscoveryValue +} + +type IEEEOUI uint32 + +// http://standards.ieee.org/develop/regauth/oui/oui.txt +const ( + IEEEOUI8021 IEEEOUI = 0x0080c2 + IEEEOUI8023 IEEEOUI = 0x00120f + IEEEOUI80211 IEEEOUI = 0x000fac + IEEEOUI8021Qbg IEEEOUI = 0x0013BF + IEEEOUICisco2 IEEEOUI = 0x000142 + IEEEOUIMedia IEEEOUI = 0x0012bb // TR-41 + IEEEOUIProfinet IEEEOUI = 0x000ecf + IEEEOUIDCBX IEEEOUI = 0x001b21 +) + +// LLDPOrgSpecificTLV is an Organisation-specific TLV +type LLDPOrgSpecificTLV struct { + OUI IEEEOUI + SubType uint8 + Info []byte +} + +// LLDPCapabilities Types +const ( + LLDPCapsOther uint16 = 1 << 0 + LLDPCapsRepeater uint16 = 1 << 1 + LLDPCapsBridge uint16 = 1 << 2 + LLDPCapsWLANAP uint16 = 1 << 3 + LLDPCapsRouter uint16 = 1 << 4 + LLDPCapsPhone uint16 = 1 << 5 + LLDPCapsDocSis uint16 = 1 << 6 + LLDPCapsStationOnly uint16 = 1 << 7 + LLDPCapsCVLAN uint16 = 1 << 8 + LLDPCapsSVLAN uint16 = 1 << 9 + LLDPCapsTmpr uint16 = 1 << 10 +) + +// LLDPCapabilities represents the capabilities of a device +type LLDPCapabilities struct { + Other bool + Repeater bool + Bridge bool + WLANAP bool + Router bool + Phone bool + DocSis bool + StationOnly bool + CVLAN bool + SVLAN bool + TMPR bool +} + +type LLDPSysCapabilities struct { + SystemCap LLDPCapabilities + EnabledCap LLDPCapabilities +} + +type IANAAddressFamily byte + +// LLDP Management Address Subtypes +// http://www.iana.org/assignments/address-family-numbers/address-family-numbers.xml +const ( + IANAAddressFamilyReserved IANAAddressFamily = 0 + IANAAddressFamilyIPV4 IANAAddressFamily = 1 + IANAAddressFamilyIPV6 IANAAddressFamily = 2 + IANAAddressFamilyNSAP IANAAddressFamily = 3 + IANAAddressFamilyHDLC IANAAddressFamily = 4 + IANAAddressFamilyBBN1822 IANAAddressFamily = 5 + IANAAddressFamily802 IANAAddressFamily = 6 + IANAAddressFamilyE163 IANAAddressFamily = 7 + IANAAddressFamilyE164 IANAAddressFamily = 8 + IANAAddressFamilyF69 IANAAddressFamily = 9 + IANAAddressFamilyX121 IANAAddressFamily = 10 + IANAAddressFamilyIPX IANAAddressFamily = 11 + IANAAddressFamilyAtalk IANAAddressFamily = 12 + IANAAddressFamilyDecnet IANAAddressFamily = 13 + IANAAddressFamilyBanyan IANAAddressFamily = 14 + IANAAddressFamilyE164NSAP IANAAddressFamily = 15 + IANAAddressFamilyDNS IANAAddressFamily = 16 + IANAAddressFamilyDistname IANAAddressFamily = 17 + IANAAddressFamilyASNumber IANAAddressFamily = 18 + IANAAddressFamilyXTPIPV4 IANAAddressFamily = 19 + IANAAddressFamilyXTPIPV6 IANAAddressFamily = 20 + IANAAddressFamilyXTP IANAAddressFamily = 21 + IANAAddressFamilyFcWWPN IANAAddressFamily = 22 + IANAAddressFamilyFcWWNN IANAAddressFamily = 23 + IANAAddressFamilyGWID IANAAddressFamily = 24 + IANAAddressFamilyL2VPN IANAAddressFamily = 25 +) + +type LLDPInterfaceSubtype byte + +// LLDP Interface Subtypes +const ( + LLDPInterfaceSubtypeUnknown LLDPInterfaceSubtype = 1 + LLDPInterfaceSubtypeifIndex LLDPInterfaceSubtype = 2 + LLDPInterfaceSubtypeSysPort LLDPInterfaceSubtype = 3 +) + +type LLDPMgmtAddress struct { + Subtype IANAAddressFamily + Address []byte + InterfaceSubtype LLDPInterfaceSubtype + InterfaceNumber uint32 + OID string +} + +// LinkLayerDiscoveryInfo represents the decoded details for a set of LinkLayerDiscoveryValues +// Organisation-specific TLV's can be decoded using the various Decode() methods +type LinkLayerDiscoveryInfo struct { + BaseLayer + PortDescription string + SysName string + SysDescription string + SysCapabilities LLDPSysCapabilities + MgmtAddress LLDPMgmtAddress + OrgTLVs []LLDPOrgSpecificTLV // Private TLVs + Unknown []LinkLayerDiscoveryValue // undecoded TLVs +} + +/// IEEE 802.1 TLV Subtypes +const ( + LLDP8021SubtypePortVLANID uint8 = 1 + LLDP8021SubtypeProtocolVLANID uint8 = 2 + LLDP8021SubtypeVLANName uint8 = 3 + LLDP8021SubtypeProtocolIdentity uint8 = 4 + LLDP8021SubtypeVDIUsageDigest uint8 = 5 + LLDP8021SubtypeManagementVID uint8 = 6 + LLDP8021SubtypeLinkAggregation uint8 = 7 +) + +// VLAN Port Protocol ID options +const ( + LLDPProtocolVLANIDCapability byte = 1 << 1 + LLDPProtocolVLANIDStatus byte = 1 << 2 +) + +type PortProtocolVLANID struct { + Supported bool + Enabled bool + ID uint16 +} + +type VLANName struct { + ID uint16 + Name string +} + +type ProtocolIdentity []byte + +// LACP options +const ( + LLDPAggregationCapability byte = 1 << 0 + LLDPAggregationStatus byte = 1 << 1 +) + +// IEEE 802 Link Aggregation parameters +type LLDPLinkAggregation struct { + Supported bool + Enabled bool + PortID uint32 +} + +// LLDPInfo8021 represents the information carried in 802.1 Org-specific TLVs +type LLDPInfo8021 struct { + PVID uint16 + PPVIDs []PortProtocolVLANID + VLANNames []VLANName + ProtocolIdentities []ProtocolIdentity + VIDUsageDigest uint32 + ManagementVID uint16 + LinkAggregation LLDPLinkAggregation +} + +// IEEE 802.3 TLV Subtypes +const ( + LLDP8023SubtypeMACPHY uint8 = 1 + LLDP8023SubtypeMDIPower uint8 = 2 + LLDP8023SubtypeLinkAggregation uint8 = 3 + LLDP8023SubtypeMTU uint8 = 4 +) + +// MACPHY options +const ( + LLDPMACPHYCapability byte = 1 << 0 + LLDPMACPHYStatus byte = 1 << 1 +) + +// From IANA-MAU-MIB (introduced by RFC 4836) - dot3MauType +const ( + LLDPMAUTypeUnknown uint16 = 0 + LLDPMAUTypeAUI uint16 = 1 + LLDPMAUType10Base5 uint16 = 2 + LLDPMAUTypeFOIRL uint16 = 3 + LLDPMAUType10Base2 uint16 = 4 + LLDPMAUType10BaseT uint16 = 5 + LLDPMAUType10BaseFP uint16 = 6 + LLDPMAUType10BaseFB uint16 = 7 + LLDPMAUType10BaseFL uint16 = 8 + LLDPMAUType10BROAD36 uint16 = 9 + LLDPMAUType10BaseT_HD uint16 = 10 + LLDPMAUType10BaseT_FD uint16 = 11 + LLDPMAUType10BaseFL_HD uint16 = 12 + LLDPMAUType10BaseFL_FD uint16 = 13 + LLDPMAUType100BaseT4 uint16 = 14 + LLDPMAUType100BaseTX_HD uint16 = 15 + LLDPMAUType100BaseTX_FD uint16 = 16 + LLDPMAUType100BaseFX_HD uint16 = 17 + LLDPMAUType100BaseFX_FD uint16 = 18 + LLDPMAUType100BaseT2_HD uint16 = 19 + LLDPMAUType100BaseT2_FD uint16 = 20 + LLDPMAUType1000BaseX_HD uint16 = 21 + LLDPMAUType1000BaseX_FD uint16 = 22 + LLDPMAUType1000BaseLX_HD uint16 = 23 + LLDPMAUType1000BaseLX_FD uint16 = 24 + LLDPMAUType1000BaseSX_HD uint16 = 25 + LLDPMAUType1000BaseSX_FD uint16 = 26 + LLDPMAUType1000BaseCX_HD uint16 = 27 + LLDPMAUType1000BaseCX_FD uint16 = 28 + LLDPMAUType1000BaseT_HD uint16 = 29 + LLDPMAUType1000BaseT_FD uint16 = 30 + LLDPMAUType10GBaseX uint16 = 31 + LLDPMAUType10GBaseLX4 uint16 = 32 + LLDPMAUType10GBaseR uint16 = 33 + LLDPMAUType10GBaseER uint16 = 34 + LLDPMAUType10GBaseLR uint16 = 35 + LLDPMAUType10GBaseSR uint16 = 36 + LLDPMAUType10GBaseW uint16 = 37 + LLDPMAUType10GBaseEW uint16 = 38 + LLDPMAUType10GBaseLW uint16 = 39 + LLDPMAUType10GBaseSW uint16 = 40 + LLDPMAUType10GBaseCX4 uint16 = 41 + LLDPMAUType2BaseTL uint16 = 42 + LLDPMAUType10PASS_TS uint16 = 43 + LLDPMAUType100BaseBX10D uint16 = 44 + LLDPMAUType100BaseBX10U uint16 = 45 + LLDPMAUType100BaseLX10 uint16 = 46 + LLDPMAUType1000BaseBX10D uint16 = 47 + LLDPMAUType1000BaseBX10U uint16 = 48 + LLDPMAUType1000BaseLX10 uint16 = 49 + LLDPMAUType1000BasePX10D uint16 = 50 + LLDPMAUType1000BasePX10U uint16 = 51 + LLDPMAUType1000BasePX20D uint16 = 52 + LLDPMAUType1000BasePX20U uint16 = 53 + LLDPMAUType10GBaseT uint16 = 54 + LLDPMAUType10GBaseLRM uint16 = 55 + LLDPMAUType1000BaseKX uint16 = 56 + LLDPMAUType10GBaseKX4 uint16 = 57 + LLDPMAUType10GBaseKR uint16 = 58 + LLDPMAUType10_1GBasePRX_D1 uint16 = 59 + LLDPMAUType10_1GBasePRX_D2 uint16 = 60 + LLDPMAUType10_1GBasePRX_D3 uint16 = 61 + LLDPMAUType10_1GBasePRX_U1 uint16 = 62 + LLDPMAUType10_1GBasePRX_U2 uint16 = 63 + LLDPMAUType10_1GBasePRX_U3 uint16 = 64 + LLDPMAUType10GBasePR_D1 uint16 = 65 + LLDPMAUType10GBasePR_D2 uint16 = 66 + LLDPMAUType10GBasePR_D3 uint16 = 67 + LLDPMAUType10GBasePR_U1 uint16 = 68 + LLDPMAUType10GBasePR_U3 uint16 = 69 +) + +// From RFC 3636 - ifMauAutoNegCapAdvertisedBits +const ( + LLDPMAUPMDOther uint16 = 1 << 15 + LLDPMAUPMD10BaseT uint16 = 1 << 14 + LLDPMAUPMD10BaseT_FD uint16 = 1 << 13 + LLDPMAUPMD100BaseT4 uint16 = 1 << 12 + LLDPMAUPMD100BaseTX uint16 = 1 << 11 + LLDPMAUPMD100BaseTX_FD uint16 = 1 << 10 + LLDPMAUPMD100BaseT2 uint16 = 1 << 9 + LLDPMAUPMD100BaseT2_FD uint16 = 1 << 8 + LLDPMAUPMDFDXPAUSE uint16 = 1 << 7 + LLDPMAUPMDFDXAPAUSE uint16 = 1 << 6 + LLDPMAUPMDFDXSPAUSE uint16 = 1 << 5 + LLDPMAUPMDFDXBPAUSE uint16 = 1 << 4 + LLDPMAUPMD1000BaseX uint16 = 1 << 3 + LLDPMAUPMD1000BaseX_FD uint16 = 1 << 2 + LLDPMAUPMD1000BaseT uint16 = 1 << 1 + LLDPMAUPMD1000BaseT_FD uint16 = 1 << 0 +) + +// Inverted ifMauAutoNegCapAdvertisedBits if required +// (Some manufacturers misinterpreted the spec - +// see https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=1455) +const ( + LLDPMAUPMDOtherInv uint16 = 1 << 0 + LLDPMAUPMD10BaseTInv uint16 = 1 << 1 + LLDPMAUPMD10BaseT_FDInv uint16 = 1 << 2 + LLDPMAUPMD100BaseT4Inv uint16 = 1 << 3 + LLDPMAUPMD100BaseTXInv uint16 = 1 << 4 + LLDPMAUPMD100BaseTX_FDInv uint16 = 1 << 5 + LLDPMAUPMD100BaseT2Inv uint16 = 1 << 6 + LLDPMAUPMD100BaseT2_FDInv uint16 = 1 << 7 + LLDPMAUPMDFDXPAUSEInv uint16 = 1 << 8 + LLDPMAUPMDFDXAPAUSEInv uint16 = 1 << 9 + LLDPMAUPMDFDXSPAUSEInv uint16 = 1 << 10 + LLDPMAUPMDFDXBPAUSEInv uint16 = 1 << 11 + LLDPMAUPMD1000BaseXInv uint16 = 1 << 12 + LLDPMAUPMD1000BaseX_FDInv uint16 = 1 << 13 + LLDPMAUPMD1000BaseTInv uint16 = 1 << 14 + LLDPMAUPMD1000BaseT_FDInv uint16 = 1 << 15 +) + +type LLDPMACPHYConfigStatus struct { + AutoNegSupported bool + AutoNegEnabled bool + AutoNegCapability uint16 + MAUType uint16 +} + +// MDI Power options +const ( + LLDPMDIPowerPortClass byte = 1 << 0 + LLDPMDIPowerCapability byte = 1 << 1 + LLDPMDIPowerStatus byte = 1 << 2 + LLDPMDIPowerPairsAbility byte = 1 << 3 +) + +type LLDPPowerType byte + +type LLDPPowerSource byte + +type LLDPPowerPriority byte + +const ( + LLDPPowerPriorityUnknown LLDPPowerPriority = 0 + LLDPPowerPriorityMedium LLDPPowerPriority = 1 + LLDPPowerPriorityHigh LLDPPowerPriority = 2 + LLDPPowerPriorityLow LLDPPowerPriority = 3 +) + +type LLDPPowerViaMDI8023 struct { + PortClassPSE bool // false = PD + PSESupported bool + PSEEnabled bool + PSEPairsAbility bool + PSEPowerPair uint8 + PSEClass uint8 + Type LLDPPowerType + Source LLDPPowerSource + Priority LLDPPowerPriority + Requested uint16 // 1-510 Watts + Allocated uint16 // 1-510 Watts +} + +// LLDPInfo8023 represents the information carried in 802.3 Org-specific TLVs +type LLDPInfo8023 struct { + MACPHYConfigStatus LLDPMACPHYConfigStatus + PowerViaMDI LLDPPowerViaMDI8023 + LinkAggregation LLDPLinkAggregation + MTU uint16 +} + +// IEEE 802.1Qbg TLV Subtypes +const ( + LLDP8021QbgEVB uint8 = 0 + LLDP8021QbgCDCP uint8 = 1 + LLDP8021QbgVDP uint8 = 2 + LLDP8021QbgEVB22 uint8 = 13 +) + +// LLDPEVBCapabilities Types +const ( + LLDPEVBCapsSTD uint16 = 1 << 7 + LLDPEVBCapsRR uint16 = 1 << 6 + LLDPEVBCapsRTE uint16 = 1 << 2 + LLDPEVBCapsECP uint16 = 1 << 1 + LLDPEVBCapsVDP uint16 = 1 << 0 +) + +// LLDPEVBCapabilities represents the EVB capabilities of a device +type LLDPEVBCapabilities struct { + StandardBridging bool + ReflectiveRelay bool + RetransmissionTimerExponent bool + EdgeControlProtocol bool + VSIDiscoveryProtocol bool +} + +type LLDPEVBSettings struct { + Supported LLDPEVBCapabilities + Enabled LLDPEVBCapabilities + SupportedVSIs uint16 + ConfiguredVSIs uint16 + RTEExponent uint8 +} + +// LLDPInfo8021Qbg represents the information carried in 802.1Qbg Org-specific TLVs +type LLDPInfo8021Qbg struct { + EVBSettings LLDPEVBSettings +} + +type LLDPMediaSubtype uint8 + +// Media TLV Subtypes +const ( + LLDPMediaTypeCapabilities LLDPMediaSubtype = 1 + LLDPMediaTypeNetwork LLDPMediaSubtype = 2 + LLDPMediaTypeLocation LLDPMediaSubtype = 3 + LLDPMediaTypePower LLDPMediaSubtype = 4 + LLDPMediaTypeHardware LLDPMediaSubtype = 5 + LLDPMediaTypeFirmware LLDPMediaSubtype = 6 + LLDPMediaTypeSoftware LLDPMediaSubtype = 7 + LLDPMediaTypeSerial LLDPMediaSubtype = 8 + LLDPMediaTypeManufacturer LLDPMediaSubtype = 9 + LLDPMediaTypeModel LLDPMediaSubtype = 10 + LLDPMediaTypeAssetID LLDPMediaSubtype = 11 +) + +type LLDPMediaClass uint8 + +// Media Class Values +const ( + LLDPMediaClassUndefined LLDPMediaClass = 0 + LLDPMediaClassEndpointI LLDPMediaClass = 1 + LLDPMediaClassEndpointII LLDPMediaClass = 2 + LLDPMediaClassEndpointIII LLDPMediaClass = 3 + LLDPMediaClassNetwork LLDPMediaClass = 4 +) + +// LLDPMediaCapabilities Types +const ( + LLDPMediaCapsLLDP uint16 = 1 << 0 + LLDPMediaCapsNetwork uint16 = 1 << 1 + LLDPMediaCapsLocation uint16 = 1 << 2 + LLDPMediaCapsPowerPSE uint16 = 1 << 3 + LLDPMediaCapsPowerPD uint16 = 1 << 4 + LLDPMediaCapsInventory uint16 = 1 << 5 +) + +// LLDPMediaCapabilities represents the LLDP Media capabilities of a device +type LLDPMediaCapabilities struct { + Capabilities bool + NetworkPolicy bool + Location bool + PowerPSE bool + PowerPD bool + Inventory bool + Class LLDPMediaClass +} + +type LLDPApplicationType uint8 + +const ( + LLDPAppTypeReserved LLDPApplicationType = 0 + LLDPAppTypeVoice LLDPApplicationType = 1 + LLDPappTypeVoiceSignaling LLDPApplicationType = 2 + LLDPappTypeGuestVoice LLDPApplicationType = 3 + LLDPappTypeGuestVoiceSignaling LLDPApplicationType = 4 + LLDPappTypeSoftphoneVoice LLDPApplicationType = 5 + LLDPappTypeVideoConferencing LLDPApplicationType = 6 + LLDPappTypeStreamingVideo LLDPApplicationType = 7 + LLDPappTypeVideoSignaling LLDPApplicationType = 8 +) + +type LLDPNetworkPolicy struct { + ApplicationType LLDPApplicationType + Defined bool + Tagged bool + VLANId uint16 + L2Priority uint16 + DSCPValue uint8 +} + +type LLDPLocationFormat uint8 + +const ( + LLDPLocationFormatInvalid LLDPLocationFormat = 0 + LLDPLocationFormatCoordinate LLDPLocationFormat = 1 + LLDPLocationFormatAddress LLDPLocationFormat = 2 + LLDPLocationFormatECS LLDPLocationFormat = 3 +) + +type LLDPLocationAddressWhat uint8 + +const ( + LLDPLocationAddressWhatDHCP LLDPLocationAddressWhat = 0 + LLDPLocationAddressWhatNetwork LLDPLocationAddressWhat = 1 + LLDPLocationAddressWhatClient LLDPLocationAddressWhat = 2 +) + +type LLDPLocationAddressType uint8 + +const ( + LLDPLocationAddressTypeLanguage LLDPLocationAddressType = 0 + LLDPLocationAddressTypeNational LLDPLocationAddressType = 1 + LLDPLocationAddressTypeCounty LLDPLocationAddressType = 2 + LLDPLocationAddressTypeCity LLDPLocationAddressType = 3 + LLDPLocationAddressTypeCityDivision LLDPLocationAddressType = 4 + LLDPLocationAddressTypeNeighborhood LLDPLocationAddressType = 5 + LLDPLocationAddressTypeStreet LLDPLocationAddressType = 6 + LLDPLocationAddressTypeLeadingStreet LLDPLocationAddressType = 16 + LLDPLocationAddressTypeTrailingStreet LLDPLocationAddressType = 17 + LLDPLocationAddressTypeStreetSuffix LLDPLocationAddressType = 18 + LLDPLocationAddressTypeHouseNum LLDPLocationAddressType = 19 + LLDPLocationAddressTypeHouseSuffix LLDPLocationAddressType = 20 + LLDPLocationAddressTypeLandmark LLDPLocationAddressType = 21 + LLDPLocationAddressTypeAdditional LLDPLocationAddressType = 22 + LLDPLocationAddressTypeName LLDPLocationAddressType = 23 + LLDPLocationAddressTypePostal LLDPLocationAddressType = 24 + LLDPLocationAddressTypeBuilding LLDPLocationAddressType = 25 + LLDPLocationAddressTypeUnit LLDPLocationAddressType = 26 + LLDPLocationAddressTypeFloor LLDPLocationAddressType = 27 + LLDPLocationAddressTypeRoom LLDPLocationAddressType = 28 + LLDPLocationAddressTypePlace LLDPLocationAddressType = 29 + LLDPLocationAddressTypeScript LLDPLocationAddressType = 128 +) + +type LLDPLocationCoordinate struct { + LatitudeResolution uint8 + Latitude uint64 + LongitudeResolution uint8 + Longitude uint64 + AltitudeType uint8 + AltitudeResolution uint16 + Altitude uint32 + Datum uint8 +} + +type LLDPLocationAddressLine struct { + Type LLDPLocationAddressType + Value string +} + +type LLDPLocationAddress struct { + What LLDPLocationAddressWhat + CountryCode string + AddressLines []LLDPLocationAddressLine +} + +type LLDPLocationECS struct { + ELIN string +} + +// LLDP represents a physical location. +// Only one of the embedded types will contain values, depending on Format. +type LLDPLocation struct { + Format LLDPLocationFormat + Coordinate LLDPLocationCoordinate + Address LLDPLocationAddress + ECS LLDPLocationECS +} + +type LLDPPowerViaMDI struct { + Type LLDPPowerType + Source LLDPPowerSource + Priority LLDPPowerPriority + Value uint16 +} + +// LLDPInfoMedia represents the information carried in TR-41 Org-specific TLVs +type LLDPInfoMedia struct { + MediaCapabilities LLDPMediaCapabilities + NetworkPolicy LLDPNetworkPolicy + Location LLDPLocation + PowerViaMDI LLDPPowerViaMDI + HardwareRevision string + FirmwareRevision string + SoftwareRevision string + SerialNumber string + Manufacturer string + Model string + AssetID string +} + +type LLDPCisco2Subtype uint8 + +// Cisco2 TLV Subtypes +const ( + LLDPCisco2PowerViaMDI LLDPCisco2Subtype = 1 +) + +const ( + LLDPCiscoPSESupport uint8 = 1 << 0 + LLDPCiscoArchShared uint8 = 1 << 1 + LLDPCiscoPDSparePair uint8 = 1 << 2 + LLDPCiscoPSESparePair uint8 = 1 << 3 +) + +// LLDPInfoCisco2 represents the information carried in Cisco Org-specific TLVs +type LLDPInfoCisco2 struct { + PSEFourWirePoESupported bool + PDSparePairArchitectureShared bool + PDRequestSparePairPoEOn bool + PSESparePairPoEOn bool +} + +// Profinet Subtypes +type LLDPProfinetSubtype uint8 + +const ( + LLDPProfinetPNIODelay LLDPProfinetSubtype = 1 + LLDPProfinetPNIOPortStatus LLDPProfinetSubtype = 2 + LLDPProfinetPNIOMRPPortStatus LLDPProfinetSubtype = 4 + LLDPProfinetPNIOChassisMAC LLDPProfinetSubtype = 5 + LLDPProfinetPNIOPTCPStatus LLDPProfinetSubtype = 6 +) + +type LLDPPNIODelay struct { + RXLocal uint32 + RXRemote uint32 + TXLocal uint32 + TXRemote uint32 + CableLocal uint32 +} + +type LLDPPNIOPortStatus struct { + Class2 uint16 + Class3 uint16 +} + +type LLDPPNIOMRPPortStatus struct { + UUID []byte + Status uint16 +} + +type LLDPPNIOPTCPStatus struct { + MasterAddress []byte + SubdomainUUID []byte + IRDataUUID []byte + PeriodValid bool + PeriodLength uint32 + RedPeriodValid bool + RedPeriodBegin uint32 + OrangePeriodValid bool + OrangePeriodBegin uint32 + GreenPeriodValid bool + GreenPeriodBegin uint32 +} + +// LLDPInfoProfinet represents the information carried in Profinet Org-specific TLVs +type LLDPInfoProfinet struct { + PNIODelay LLDPPNIODelay + PNIOPortStatus LLDPPNIOPortStatus + PNIOMRPPortStatus LLDPPNIOMRPPortStatus + ChassisMAC []byte + PNIOPTCPStatus LLDPPNIOPTCPStatus +} + +// LayerType returns gopacket.LayerTypeLinkLayerDiscovery. +func (c *LinkLayerDiscovery) LayerType() gopacket.LayerType { + return LayerTypeLinkLayerDiscovery +} + +// SerializeTo serializes LLDP packet to bytes and writes on SerializeBuffer. +func (c *LinkLayerDiscovery) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + chassIDLen := c.ChassisID.serializedLen() + portIDLen := c.PortID.serializedLen() + vb, err := b.AppendBytes(chassIDLen + portIDLen + 4) // +4 for TTL + if err != nil { + return err + } + copy(vb[:chassIDLen], c.ChassisID.serialize()) + copy(vb[chassIDLen:], c.PortID.serialize()) + ttlIDLen := uint16(LLDPTLVTTL)<<9 | uint16(2) + binary.BigEndian.PutUint16(vb[chassIDLen+portIDLen:], ttlIDLen) + binary.BigEndian.PutUint16(vb[chassIDLen+portIDLen+2:], c.TTL) + + for _, v := range c.Values { + vb, err := b.AppendBytes(int(v.Length) + 2) // +2 for TLV type and length; 1 byte for subtype is included in v.Value + if err != nil { + return err + } + idLen := ((uint16(v.Type) << 9) | v.Length) + binary.BigEndian.PutUint16(vb[0:2], idLen) + copy(vb[2:], v.Value) + } + + vb, err = b.AppendBytes(2) // End Tlv, 2 bytes + if err != nil { + return err + } + binary.BigEndian.PutUint16(vb[len(vb)-2:], uint16(0)) //End tlv, 2 bytes, all zero + return nil + +} + +func decodeLinkLayerDiscovery(data []byte, p gopacket.PacketBuilder) error { + var vals []LinkLayerDiscoveryValue + vData := data[0:] + for len(vData) > 0 { + if len(vData) < 2 { + p.SetTruncated() + return errors.New("LLDP vdata < 2 bytes") + } + nbit := vData[0] & 0x01 + t := LLDPTLVType(vData[0] >> 1) + val := LinkLayerDiscoveryValue{Type: t, Length: uint16(nbit)<<8 + uint16(vData[1])} + if val.Length > 0 { + if len(vData) < int(val.Length+2) { + p.SetTruncated() + return fmt.Errorf("LLDP VData < %d bytes", val.Length+2) + } + val.Value = vData[2 : val.Length+2] + } + vals = append(vals, val) + if t == LLDPTLVEnd { + break + } + if len(vData) < int(2+val.Length) { + return errors.New("Malformed LinkLayerDiscovery Header") + } + vData = vData[2+val.Length:] + } + if len(vals) < 4 { + return errors.New("Missing mandatory LinkLayerDiscovery TLV") + } + c := &LinkLayerDiscovery{} + gotEnd := false + for _, v := range vals { + switch v.Type { + case LLDPTLVEnd: + gotEnd = true + case LLDPTLVChassisID: + if len(v.Value) < 2 { + return errors.New("Malformed LinkLayerDiscovery ChassisID TLV") + } + c.ChassisID.Subtype = LLDPChassisIDSubType(v.Value[0]) + c.ChassisID.ID = v.Value[1:] + case LLDPTLVPortID: + if len(v.Value) < 2 { + return errors.New("Malformed LinkLayerDiscovery PortID TLV") + } + c.PortID.Subtype = LLDPPortIDSubType(v.Value[0]) + c.PortID.ID = v.Value[1:] + case LLDPTLVTTL: + if len(v.Value) < 2 { + return errors.New("Malformed LinkLayerDiscovery TTL TLV") + } + c.TTL = binary.BigEndian.Uint16(v.Value[0:2]) + default: + c.Values = append(c.Values, v) + } + } + if c.ChassisID.Subtype == 0 || c.PortID.Subtype == 0 || !gotEnd { + return errors.New("Missing mandatory LinkLayerDiscovery TLV") + } + c.Contents = data + p.AddLayer(c) + + info := &LinkLayerDiscoveryInfo{} + p.AddLayer(info) + for _, v := range c.Values { + switch v.Type { + case LLDPTLVPortDescription: + info.PortDescription = string(v.Value) + case LLDPTLVSysName: + info.SysName = string(v.Value) + case LLDPTLVSysDescription: + info.SysDescription = string(v.Value) + case LLDPTLVSysCapabilities: + if err := checkLLDPTLVLen(v, 4); err != nil { + return err + } + info.SysCapabilities.SystemCap = getCapabilities(binary.BigEndian.Uint16(v.Value[0:2])) + info.SysCapabilities.EnabledCap = getCapabilities(binary.BigEndian.Uint16(v.Value[2:4])) + case LLDPTLVMgmtAddress: + if err := checkLLDPTLVLen(v, 9); err != nil { + return err + } + mlen := v.Value[0] + if err := checkLLDPTLVLen(v, int(mlen+7)); err != nil { + return err + } + info.MgmtAddress.Subtype = IANAAddressFamily(v.Value[1]) + info.MgmtAddress.Address = v.Value[2 : mlen+1] + info.MgmtAddress.InterfaceSubtype = LLDPInterfaceSubtype(v.Value[mlen+1]) + info.MgmtAddress.InterfaceNumber = binary.BigEndian.Uint32(v.Value[mlen+2 : mlen+6]) + olen := v.Value[mlen+6] + if err := checkLLDPTLVLen(v, int(mlen+7+olen)); err != nil { + return err + } + info.MgmtAddress.OID = string(v.Value[mlen+7 : mlen+7+olen]) + case LLDPTLVOrgSpecific: + if err := checkLLDPTLVLen(v, 4); err != nil { + return err + } + info.OrgTLVs = append(info.OrgTLVs, LLDPOrgSpecificTLV{IEEEOUI(binary.BigEndian.Uint32(append([]byte{byte(0)}, v.Value[0:3]...))), uint8(v.Value[3]), v.Value[4:]}) + } + } + return nil +} + +func (l *LinkLayerDiscoveryInfo) Decode8021() (info LLDPInfo8021, err error) { + for _, o := range l.OrgTLVs { + if o.OUI != IEEEOUI8021 { + continue + } + switch o.SubType { + case LLDP8021SubtypePortVLANID: + if err = checkLLDPOrgSpecificLen(o, 2); err != nil { + return + } + info.PVID = binary.BigEndian.Uint16(o.Info[0:2]) + case LLDP8021SubtypeProtocolVLANID: + if err = checkLLDPOrgSpecificLen(o, 3); err != nil { + return + } + sup := (o.Info[0]&LLDPProtocolVLANIDCapability > 0) + en := (o.Info[0]&LLDPProtocolVLANIDStatus > 0) + id := binary.BigEndian.Uint16(o.Info[1:3]) + info.PPVIDs = append(info.PPVIDs, PortProtocolVLANID{sup, en, id}) + case LLDP8021SubtypeVLANName: + if err = checkLLDPOrgSpecificLen(o, 2); err != nil { + return + } + id := binary.BigEndian.Uint16(o.Info[0:2]) + info.VLANNames = append(info.VLANNames, VLANName{id, string(o.Info[3:])}) + case LLDP8021SubtypeProtocolIdentity: + if err = checkLLDPOrgSpecificLen(o, 1); err != nil { + return + } + l := int(o.Info[0]) + if l > 0 { + info.ProtocolIdentities = append(info.ProtocolIdentities, o.Info[1:1+l]) + } + case LLDP8021SubtypeVDIUsageDigest: + if err = checkLLDPOrgSpecificLen(o, 4); err != nil { + return + } + info.VIDUsageDigest = binary.BigEndian.Uint32(o.Info[0:4]) + case LLDP8021SubtypeManagementVID: + if err = checkLLDPOrgSpecificLen(o, 2); err != nil { + return + } + info.ManagementVID = binary.BigEndian.Uint16(o.Info[0:2]) + case LLDP8021SubtypeLinkAggregation: + if err = checkLLDPOrgSpecificLen(o, 5); err != nil { + return + } + sup := (o.Info[0]&LLDPAggregationCapability > 0) + en := (o.Info[0]&LLDPAggregationStatus > 0) + info.LinkAggregation = LLDPLinkAggregation{sup, en, binary.BigEndian.Uint32(o.Info[1:5])} + } + } + return +} + +func (l *LinkLayerDiscoveryInfo) Decode8023() (info LLDPInfo8023, err error) { + for _, o := range l.OrgTLVs { + if o.OUI != IEEEOUI8023 { + continue + } + switch o.SubType { + case LLDP8023SubtypeMACPHY: + if err = checkLLDPOrgSpecificLen(o, 5); err != nil { + return + } + sup := (o.Info[0]&LLDPMACPHYCapability > 0) + en := (o.Info[0]&LLDPMACPHYStatus > 0) + ca := binary.BigEndian.Uint16(o.Info[1:3]) + mau := binary.BigEndian.Uint16(o.Info[3:5]) + info.MACPHYConfigStatus = LLDPMACPHYConfigStatus{sup, en, ca, mau} + case LLDP8023SubtypeMDIPower: + if err = checkLLDPOrgSpecificLen(o, 3); err != nil { + return + } + info.PowerViaMDI.PortClassPSE = (o.Info[0]&LLDPMDIPowerPortClass > 0) + info.PowerViaMDI.PSESupported = (o.Info[0]&LLDPMDIPowerCapability > 0) + info.PowerViaMDI.PSEEnabled = (o.Info[0]&LLDPMDIPowerStatus > 0) + info.PowerViaMDI.PSEPairsAbility = (o.Info[0]&LLDPMDIPowerPairsAbility > 0) + info.PowerViaMDI.PSEPowerPair = uint8(o.Info[1]) + info.PowerViaMDI.PSEClass = uint8(o.Info[2]) + if len(o.Info) >= 7 { + info.PowerViaMDI.Type = LLDPPowerType((o.Info[3] & 0xc0) >> 6) + info.PowerViaMDI.Source = LLDPPowerSource((o.Info[3] & 0x30) >> 4) + if info.PowerViaMDI.Type == 1 || info.PowerViaMDI.Type == 3 { + info.PowerViaMDI.Source += 128 // For Stringify purposes + } + info.PowerViaMDI.Priority = LLDPPowerPriority(o.Info[3] & 0x0f) + info.PowerViaMDI.Requested = binary.BigEndian.Uint16(o.Info[4:6]) + info.PowerViaMDI.Allocated = binary.BigEndian.Uint16(o.Info[6:8]) + } + case LLDP8023SubtypeLinkAggregation: + if err = checkLLDPOrgSpecificLen(o, 5); err != nil { + return + } + sup := (o.Info[0]&LLDPAggregationCapability > 0) + en := (o.Info[0]&LLDPAggregationStatus > 0) + info.LinkAggregation = LLDPLinkAggregation{sup, en, binary.BigEndian.Uint32(o.Info[1:5])} + case LLDP8023SubtypeMTU: + if err = checkLLDPOrgSpecificLen(o, 2); err != nil { + return + } + info.MTU = binary.BigEndian.Uint16(o.Info[0:2]) + } + } + return +} + +func (l *LinkLayerDiscoveryInfo) Decode8021Qbg() (info LLDPInfo8021Qbg, err error) { + for _, o := range l.OrgTLVs { + if o.OUI != IEEEOUI8021Qbg { + continue + } + switch o.SubType { + case LLDP8021QbgEVB: + if err = checkLLDPOrgSpecificLen(o, 9); err != nil { + return + } + info.EVBSettings.Supported = getEVBCapabilities(binary.BigEndian.Uint16(o.Info[0:2])) + info.EVBSettings.Enabled = getEVBCapabilities(binary.BigEndian.Uint16(o.Info[2:4])) + info.EVBSettings.SupportedVSIs = binary.BigEndian.Uint16(o.Info[4:6]) + info.EVBSettings.ConfiguredVSIs = binary.BigEndian.Uint16(o.Info[6:8]) + info.EVBSettings.RTEExponent = uint8(o.Info[8]) + } + } + return +} + +func (l *LinkLayerDiscoveryInfo) DecodeMedia() (info LLDPInfoMedia, err error) { + for _, o := range l.OrgTLVs { + if o.OUI != IEEEOUIMedia { + continue + } + switch LLDPMediaSubtype(o.SubType) { + case LLDPMediaTypeCapabilities: + if err = checkLLDPOrgSpecificLen(o, 3); err != nil { + return + } + b := binary.BigEndian.Uint16(o.Info[0:2]) + info.MediaCapabilities.Capabilities = (b & LLDPMediaCapsLLDP) > 0 + info.MediaCapabilities.NetworkPolicy = (b & LLDPMediaCapsNetwork) > 0 + info.MediaCapabilities.Location = (b & LLDPMediaCapsLocation) > 0 + info.MediaCapabilities.PowerPSE = (b & LLDPMediaCapsPowerPSE) > 0 + info.MediaCapabilities.PowerPD = (b & LLDPMediaCapsPowerPD) > 0 + info.MediaCapabilities.Inventory = (b & LLDPMediaCapsInventory) > 0 + info.MediaCapabilities.Class = LLDPMediaClass(o.Info[2]) + case LLDPMediaTypeNetwork: + if err = checkLLDPOrgSpecificLen(o, 4); err != nil { + return + } + info.NetworkPolicy.ApplicationType = LLDPApplicationType(o.Info[0]) + b := binary.BigEndian.Uint16(o.Info[1:3]) + info.NetworkPolicy.Defined = (b & 0x8000) == 0 + info.NetworkPolicy.Tagged = (b & 0x4000) > 0 + info.NetworkPolicy.VLANId = (b & 0x1ffe) >> 1 + b = binary.BigEndian.Uint16(o.Info[2:4]) + info.NetworkPolicy.L2Priority = (b & 0x01c0) >> 6 + info.NetworkPolicy.DSCPValue = uint8(o.Info[3] & 0x3f) + case LLDPMediaTypeLocation: + if err = checkLLDPOrgSpecificLen(o, 1); err != nil { + return + } + info.Location.Format = LLDPLocationFormat(o.Info[0]) + o.Info = o.Info[1:] + switch info.Location.Format { + case LLDPLocationFormatCoordinate: + if err = checkLLDPOrgSpecificLen(o, 16); err != nil { + return + } + info.Location.Coordinate.LatitudeResolution = uint8(o.Info[0]&0xfc) >> 2 + b := binary.BigEndian.Uint64(o.Info[0:8]) + info.Location.Coordinate.Latitude = (b & 0x03ffffffff000000) >> 24 + info.Location.Coordinate.LongitudeResolution = uint8(o.Info[5]&0xfc) >> 2 + b = binary.BigEndian.Uint64(o.Info[5:13]) + info.Location.Coordinate.Longitude = (b & 0x03ffffffff000000) >> 24 + info.Location.Coordinate.AltitudeType = uint8((o.Info[10] & 0x30) >> 4) + b1 := binary.BigEndian.Uint16(o.Info[10:12]) + info.Location.Coordinate.AltitudeResolution = (b1 & 0xfc0) >> 6 + b2 := binary.BigEndian.Uint32(o.Info[11:15]) + info.Location.Coordinate.Altitude = b2 & 0x3fffffff + info.Location.Coordinate.Datum = uint8(o.Info[15]) + case LLDPLocationFormatAddress: + if err = checkLLDPOrgSpecificLen(o, 3); err != nil { + return + } + //ll := uint8(o.Info[0]) + info.Location.Address.What = LLDPLocationAddressWhat(o.Info[1]) + info.Location.Address.CountryCode = string(o.Info[2:4]) + data := o.Info[4:] + for len(data) > 1 { + aType := LLDPLocationAddressType(data[0]) + aLen := int(data[1]) + if len(data) >= aLen+2 { + info.Location.Address.AddressLines = append(info.Location.Address.AddressLines, LLDPLocationAddressLine{aType, string(data[2 : aLen+2])}) + data = data[aLen+2:] + } else { + break + } + } + case LLDPLocationFormatECS: + info.Location.ECS.ELIN = string(o.Info) + } + case LLDPMediaTypePower: + if err = checkLLDPOrgSpecificLen(o, 3); err != nil { + return + } + info.PowerViaMDI.Type = LLDPPowerType((o.Info[0] & 0xc0) >> 6) + info.PowerViaMDI.Source = LLDPPowerSource((o.Info[0] & 0x30) >> 4) + if info.PowerViaMDI.Type == 1 || info.PowerViaMDI.Type == 3 { + info.PowerViaMDI.Source += 128 // For Stringify purposes + } + info.PowerViaMDI.Priority = LLDPPowerPriority(o.Info[0] & 0x0f) + info.PowerViaMDI.Value = binary.BigEndian.Uint16(o.Info[1:3]) * 100 // 0 to 102.3 w, 0.1W increments + case LLDPMediaTypeHardware: + info.HardwareRevision = string(o.Info) + case LLDPMediaTypeFirmware: + info.FirmwareRevision = string(o.Info) + case LLDPMediaTypeSoftware: + info.SoftwareRevision = string(o.Info) + case LLDPMediaTypeSerial: + info.SerialNumber = string(o.Info) + case LLDPMediaTypeManufacturer: + info.Manufacturer = string(o.Info) + case LLDPMediaTypeModel: + info.Model = string(o.Info) + case LLDPMediaTypeAssetID: + info.AssetID = string(o.Info) + } + } + return +} + +func (l *LinkLayerDiscoveryInfo) DecodeCisco2() (info LLDPInfoCisco2, err error) { + for _, o := range l.OrgTLVs { + if o.OUI != IEEEOUICisco2 { + continue + } + switch LLDPCisco2Subtype(o.SubType) { + case LLDPCisco2PowerViaMDI: + if err = checkLLDPOrgSpecificLen(o, 1); err != nil { + return + } + info.PSEFourWirePoESupported = (o.Info[0] & LLDPCiscoPSESupport) > 0 + info.PDSparePairArchitectureShared = (o.Info[0] & LLDPCiscoArchShared) > 0 + info.PDRequestSparePairPoEOn = (o.Info[0] & LLDPCiscoPDSparePair) > 0 + info.PSESparePairPoEOn = (o.Info[0] & LLDPCiscoPSESparePair) > 0 + } + } + return +} + +func (l *LinkLayerDiscoveryInfo) DecodeProfinet() (info LLDPInfoProfinet, err error) { + for _, o := range l.OrgTLVs { + if o.OUI != IEEEOUIProfinet { + continue + } + switch LLDPProfinetSubtype(o.SubType) { + case LLDPProfinetPNIODelay: + if err = checkLLDPOrgSpecificLen(o, 20); err != nil { + return + } + info.PNIODelay.RXLocal = binary.BigEndian.Uint32(o.Info[0:4]) + info.PNIODelay.RXRemote = binary.BigEndian.Uint32(o.Info[4:8]) + info.PNIODelay.TXLocal = binary.BigEndian.Uint32(o.Info[8:12]) + info.PNIODelay.TXRemote = binary.BigEndian.Uint32(o.Info[12:16]) + info.PNIODelay.CableLocal = binary.BigEndian.Uint32(o.Info[16:20]) + case LLDPProfinetPNIOPortStatus: + if err = checkLLDPOrgSpecificLen(o, 4); err != nil { + return + } + info.PNIOPortStatus.Class2 = binary.BigEndian.Uint16(o.Info[0:2]) + info.PNIOPortStatus.Class3 = binary.BigEndian.Uint16(o.Info[2:4]) + case LLDPProfinetPNIOMRPPortStatus: + if err = checkLLDPOrgSpecificLen(o, 18); err != nil { + return + } + info.PNIOMRPPortStatus.UUID = o.Info[0:16] + info.PNIOMRPPortStatus.Status = binary.BigEndian.Uint16(o.Info[16:18]) + case LLDPProfinetPNIOChassisMAC: + if err = checkLLDPOrgSpecificLen(o, 6); err != nil { + return + } + info.ChassisMAC = o.Info[0:6] + case LLDPProfinetPNIOPTCPStatus: + if err = checkLLDPOrgSpecificLen(o, 54); err != nil { + return + } + info.PNIOPTCPStatus.MasterAddress = o.Info[0:6] + info.PNIOPTCPStatus.SubdomainUUID = o.Info[6:22] + info.PNIOPTCPStatus.IRDataUUID = o.Info[22:38] + b := binary.BigEndian.Uint32(o.Info[38:42]) + info.PNIOPTCPStatus.PeriodValid = (b & 0x80000000) > 0 + info.PNIOPTCPStatus.PeriodLength = b & 0x7fffffff + b = binary.BigEndian.Uint32(o.Info[42:46]) + info.PNIOPTCPStatus.RedPeriodValid = (b & 0x80000000) > 0 + info.PNIOPTCPStatus.RedPeriodBegin = b & 0x7fffffff + b = binary.BigEndian.Uint32(o.Info[46:50]) + info.PNIOPTCPStatus.OrangePeriodValid = (b & 0x80000000) > 0 + info.PNIOPTCPStatus.OrangePeriodBegin = b & 0x7fffffff + b = binary.BigEndian.Uint32(o.Info[50:54]) + info.PNIOPTCPStatus.GreenPeriodValid = (b & 0x80000000) > 0 + info.PNIOPTCPStatus.GreenPeriodBegin = b & 0x7fffffff + } + } + return +} + +// LayerType returns gopacket.LayerTypeLinkLayerDiscoveryInfo. +func (c *LinkLayerDiscoveryInfo) LayerType() gopacket.LayerType { + return LayerTypeLinkLayerDiscoveryInfo +} + +func getCapabilities(v uint16) (c LLDPCapabilities) { + c.Other = (v&LLDPCapsOther > 0) + c.Repeater = (v&LLDPCapsRepeater > 0) + c.Bridge = (v&LLDPCapsBridge > 0) + c.WLANAP = (v&LLDPCapsWLANAP > 0) + c.Router = (v&LLDPCapsRouter > 0) + c.Phone = (v&LLDPCapsPhone > 0) + c.DocSis = (v&LLDPCapsDocSis > 0) + c.StationOnly = (v&LLDPCapsStationOnly > 0) + c.CVLAN = (v&LLDPCapsCVLAN > 0) + c.SVLAN = (v&LLDPCapsSVLAN > 0) + c.TMPR = (v&LLDPCapsTmpr > 0) + return +} + +func getEVBCapabilities(v uint16) (c LLDPEVBCapabilities) { + c.StandardBridging = (v & LLDPEVBCapsSTD) > 0 + c.StandardBridging = (v & LLDPEVBCapsSTD) > 0 + c.ReflectiveRelay = (v & LLDPEVBCapsRR) > 0 + c.RetransmissionTimerExponent = (v & LLDPEVBCapsRTE) > 0 + c.EdgeControlProtocol = (v & LLDPEVBCapsECP) > 0 + c.VSIDiscoveryProtocol = (v & LLDPEVBCapsVDP) > 0 + return +} + +func (t LLDPTLVType) String() (s string) { + switch t { + case LLDPTLVEnd: + s = "TLV End" + case LLDPTLVChassisID: + s = "Chassis ID" + case LLDPTLVPortID: + s = "Port ID" + case LLDPTLVTTL: + s = "TTL" + case LLDPTLVPortDescription: + s = "Port Description" + case LLDPTLVSysName: + s = "System Name" + case LLDPTLVSysDescription: + s = "System Description" + case LLDPTLVSysCapabilities: + s = "System Capabilities" + case LLDPTLVMgmtAddress: + s = "Management Address" + case LLDPTLVOrgSpecific: + s = "Organisation Specific" + default: + s = "Unknown" + } + return +} + +func (t LLDPChassisIDSubType) String() (s string) { + switch t { + case LLDPChassisIDSubTypeReserved: + s = "Reserved" + case LLDPChassisIDSubTypeChassisComp: + s = "Chassis Component" + case LLDPChassisIDSubtypeIfaceAlias: + s = "Interface Alias" + case LLDPChassisIDSubTypePortComp: + s = "Port Component" + case LLDPChassisIDSubTypeMACAddr: + s = "MAC Address" + case LLDPChassisIDSubTypeNetworkAddr: + s = "Network Address" + case LLDPChassisIDSubtypeIfaceName: + s = "Interface Name" + case LLDPChassisIDSubTypeLocal: + s = "Local" + default: + s = "Unknown" + } + return +} + +func (t LLDPPortIDSubType) String() (s string) { + switch t { + case LLDPPortIDSubtypeReserved: + s = "Reserved" + case LLDPPortIDSubtypeIfaceAlias: + s = "Interface Alias" + case LLDPPortIDSubtypePortComp: + s = "Port Component" + case LLDPPortIDSubtypeMACAddr: + s = "MAC Address" + case LLDPPortIDSubtypeNetworkAddr: + s = "Network Address" + case LLDPPortIDSubtypeIfaceName: + s = "Interface Name" + case LLDPPortIDSubtypeAgentCircuitID: + s = "Agent Circuit ID" + case LLDPPortIDSubtypeLocal: + s = "Local" + default: + s = "Unknown" + } + return +} + +func (t IANAAddressFamily) String() (s string) { + switch t { + case IANAAddressFamilyReserved: + s = "Reserved" + case IANAAddressFamilyIPV4: + s = "IPv4" + case IANAAddressFamilyIPV6: + s = "IPv6" + case IANAAddressFamilyNSAP: + s = "NSAP" + case IANAAddressFamilyHDLC: + s = "HDLC" + case IANAAddressFamilyBBN1822: + s = "BBN 1822" + case IANAAddressFamily802: + s = "802 media plus Ethernet 'canonical format'" + case IANAAddressFamilyE163: + s = "E.163" + case IANAAddressFamilyE164: + s = "E.164 (SMDS, Frame Relay, ATM)" + case IANAAddressFamilyF69: + s = "F.69 (Telex)" + case IANAAddressFamilyX121: + s = "X.121, X.25, Frame Relay" + case IANAAddressFamilyIPX: + s = "IPX" + case IANAAddressFamilyAtalk: + s = "Appletalk" + case IANAAddressFamilyDecnet: + s = "Decnet IV" + case IANAAddressFamilyBanyan: + s = "Banyan Vines" + case IANAAddressFamilyE164NSAP: + s = "E.164 with NSAP format subaddress" + case IANAAddressFamilyDNS: + s = "DNS" + case IANAAddressFamilyDistname: + s = "Distinguished Name" + case IANAAddressFamilyASNumber: + s = "AS Number" + case IANAAddressFamilyXTPIPV4: + s = "XTP over IP version 4" + case IANAAddressFamilyXTPIPV6: + s = "XTP over IP version 6" + case IANAAddressFamilyXTP: + s = "XTP native mode XTP" + case IANAAddressFamilyFcWWPN: + s = "Fibre Channel World-Wide Port Name" + case IANAAddressFamilyFcWWNN: + s = "Fibre Channel World-Wide Node Name" + case IANAAddressFamilyGWID: + s = "GWID" + case IANAAddressFamilyL2VPN: + s = "AFI for Layer 2 VPN" + default: + s = "Unknown" + } + return +} + +func (t LLDPInterfaceSubtype) String() (s string) { + switch t { + case LLDPInterfaceSubtypeUnknown: + s = "Unknown" + case LLDPInterfaceSubtypeifIndex: + s = "IfIndex" + case LLDPInterfaceSubtypeSysPort: + s = "System Port Number" + default: + s = "Unknown" + } + return +} + +func (t LLDPPowerType) String() (s string) { + switch t { + case 0: + s = "Type 2 PSE Device" + case 1: + s = "Type 2 PD Device" + case 2: + s = "Type 1 PSE Device" + case 3: + s = "Type 1 PD Device" + default: + s = "Unknown" + } + return +} + +func (t LLDPPowerSource) String() (s string) { + switch t { + // PD Device + case 0: + s = "Unknown" + case 1: + s = "PSE" + case 2: + s = "Local" + case 3: + s = "PSE and Local" + // PSE Device (Actual value + 128) + case 128: + s = "Unknown" + case 129: + s = "Primary Power Source" + case 130: + s = "Backup Power Source" + default: + s = "Unknown" + } + return +} + +func (t LLDPPowerPriority) String() (s string) { + switch t { + case 0: + s = "Unknown" + case 1: + s = "Critical" + case 2: + s = "High" + case 3: + s = "Low" + default: + s = "Unknown" + } + return +} + +func (t LLDPMediaSubtype) String() (s string) { + switch t { + case LLDPMediaTypeCapabilities: + s = "Media Capabilities " + case LLDPMediaTypeNetwork: + s = "Network Policy" + case LLDPMediaTypeLocation: + s = "Location Identification" + case LLDPMediaTypePower: + s = "Extended Power-via-MDI" + case LLDPMediaTypeHardware: + s = "Hardware Revision" + case LLDPMediaTypeFirmware: + s = "Firmware Revision" + case LLDPMediaTypeSoftware: + s = "Software Revision" + case LLDPMediaTypeSerial: + s = "Serial Number" + case LLDPMediaTypeManufacturer: + s = "Manufacturer" + case LLDPMediaTypeModel: + s = "Model" + case LLDPMediaTypeAssetID: + s = "Asset ID" + default: + s = "Unknown" + } + return +} + +func (t LLDPMediaClass) String() (s string) { + switch t { + case LLDPMediaClassUndefined: + s = "Undefined" + case LLDPMediaClassEndpointI: + s = "Endpoint Class I" + case LLDPMediaClassEndpointII: + s = "Endpoint Class II" + case LLDPMediaClassEndpointIII: + s = "Endpoint Class III" + case LLDPMediaClassNetwork: + s = "Network connectivity " + default: + s = "Unknown" + } + return +} + +func (t LLDPApplicationType) String() (s string) { + switch t { + case LLDPAppTypeReserved: + s = "Reserved" + case LLDPAppTypeVoice: + s = "Voice" + case LLDPappTypeVoiceSignaling: + s = "Voice Signaling" + case LLDPappTypeGuestVoice: + s = "Guest Voice" + case LLDPappTypeGuestVoiceSignaling: + s = "Guest Voice Signaling" + case LLDPappTypeSoftphoneVoice: + s = "Softphone Voice" + case LLDPappTypeVideoConferencing: + s = "Video Conferencing" + case LLDPappTypeStreamingVideo: + s = "Streaming Video" + case LLDPappTypeVideoSignaling: + s = "Video Signaling" + default: + s = "Unknown" + } + return +} + +func (t LLDPLocationFormat) String() (s string) { + switch t { + case LLDPLocationFormatInvalid: + s = "Invalid" + case LLDPLocationFormatCoordinate: + s = "Coordinate-based LCI" + case LLDPLocationFormatAddress: + s = "Address-based LCO" + case LLDPLocationFormatECS: + s = "ECS ELIN" + default: + s = "Unknown" + } + return +} + +func (t LLDPLocationAddressType) String() (s string) { + switch t { + case LLDPLocationAddressTypeLanguage: + s = "Language" + case LLDPLocationAddressTypeNational: + s = "National subdivisions (province, state, etc)" + case LLDPLocationAddressTypeCounty: + s = "County, parish, district" + case LLDPLocationAddressTypeCity: + s = "City, township" + case LLDPLocationAddressTypeCityDivision: + s = "City division, borough, ward" + case LLDPLocationAddressTypeNeighborhood: + s = "Neighborhood, block" + case LLDPLocationAddressTypeStreet: + s = "Street" + case LLDPLocationAddressTypeLeadingStreet: + s = "Leading street direction" + case LLDPLocationAddressTypeTrailingStreet: + s = "Trailing street suffix" + case LLDPLocationAddressTypeStreetSuffix: + s = "Street suffix" + case LLDPLocationAddressTypeHouseNum: + s = "House number" + case LLDPLocationAddressTypeHouseSuffix: + s = "House number suffix" + case LLDPLocationAddressTypeLandmark: + s = "Landmark or vanity address" + case LLDPLocationAddressTypeAdditional: + s = "Additional location information" + case LLDPLocationAddressTypeName: + s = "Name" + case LLDPLocationAddressTypePostal: + s = "Postal/ZIP code" + case LLDPLocationAddressTypeBuilding: + s = "Building" + case LLDPLocationAddressTypeUnit: + s = "Unit" + case LLDPLocationAddressTypeFloor: + s = "Floor" + case LLDPLocationAddressTypeRoom: + s = "Room number" + case LLDPLocationAddressTypePlace: + s = "Place type" + case LLDPLocationAddressTypeScript: + s = "Script" + default: + s = "Unknown" + } + return +} + +func checkLLDPTLVLen(v LinkLayerDiscoveryValue, l int) (err error) { + if len(v.Value) < l { + err = fmt.Errorf("Invalid TLV %v length %d (wanted mimimum %v", v.Type, len(v.Value), l) + } + return +} + +func checkLLDPOrgSpecificLen(o LLDPOrgSpecificTLV, l int) (err error) { + if len(o.Info) < l { + err = fmt.Errorf("Invalid Org Specific TLV %v length %d (wanted minimum %v)", o.SubType, len(o.Info), l) + } + return +} diff --git a/backend/vendor/github.com/google/gopacket/layers/loopback.go b/backend/vendor/github.com/google/gopacket/layers/loopback.go new file mode 100644 index 0000000..839f760 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/loopback.go @@ -0,0 +1,80 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + + "github.com/google/gopacket" +) + +// Loopback contains the header for loopback encapsulation. This header is +// used by both BSD and OpenBSD style loopback decoding (pcap's DLT_NULL +// and DLT_LOOP, respectively). +type Loopback struct { + BaseLayer + Family ProtocolFamily +} + +// LayerType returns LayerTypeLoopback. +func (l *Loopback) LayerType() gopacket.LayerType { return LayerTypeLoopback } + +// DecodeFromBytes decodes the given bytes into this layer. +func (l *Loopback) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 4 { + return errors.New("Loopback packet too small") + } + + // The protocol could be either big-endian or little-endian, we're + // not sure. But we're PRETTY sure that the value is less than + // 256, so we can check the first two bytes. + var prot uint32 + if data[0] == 0 && data[1] == 0 { + prot = binary.BigEndian.Uint32(data[:4]) + } else { + prot = binary.LittleEndian.Uint32(data[:4]) + } + if prot > 0xFF { + return fmt.Errorf("Invalid loopback protocol %q", data[:4]) + } + + l.Family = ProtocolFamily(prot) + l.BaseLayer = BaseLayer{data[:4], data[4:]} + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (l *Loopback) CanDecode() gopacket.LayerClass { + return LayerTypeLoopback +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (l *Loopback) NextLayerType() gopacket.LayerType { + return l.Family.LayerType() +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +func (l *Loopback) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + bytes, err := b.PrependBytes(4) + if err != nil { + return err + } + binary.LittleEndian.PutUint32(bytes, uint32(l.Family)) + return nil +} + +func decodeLoopback(data []byte, p gopacket.PacketBuilder) error { + l := Loopback{} + if err := l.DecodeFromBytes(data, gopacket.NilDecodeFeedback); err != nil { + return err + } + p.AddLayer(&l) + return p.NextDecoder(l.Family) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/mldv1.go b/backend/vendor/github.com/google/gopacket/layers/mldv1.go new file mode 100644 index 0000000..e1bb1dc --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/mldv1.go @@ -0,0 +1,182 @@ +// Copyright 2018 GoPacket Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + "math" + "net" + "time" + + "github.com/google/gopacket" +) + +// MLDv1Message represents the common structure of all MLDv1 messages +type MLDv1Message struct { + BaseLayer + // 3.4. Maximum Response Delay + MaximumResponseDelay time.Duration + // 3.6. Multicast Address + // Zero in general query + // Specific IPv6 multicast address otherwise + MulticastAddress net.IP +} + +// DecodeFromBytes decodes the given bytes into this layer. +func (m *MLDv1Message) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 20 { + df.SetTruncated() + return errors.New("ICMP layer less than 20 bytes for Multicast Listener Query Message V1") + } + + m.MaximumResponseDelay = time.Duration(binary.BigEndian.Uint16(data[0:2])) * time.Millisecond + // data[2:4] is reserved and not used in mldv1 + m.MulticastAddress = data[4:20] + + return nil +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (*MLDv1Message) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypeZero +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (m *MLDv1Message) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + buf, err := b.PrependBytes(20) + if err != nil { + return err + } + + if m.MaximumResponseDelay < 0 { + return errors.New("maximum response delay must not be negative") + } + dms := m.MaximumResponseDelay / time.Millisecond + if dms > math.MaxUint16 { + return fmt.Errorf("maximum response delay %dms is more than the allowed 65535ms", dms) + } + binary.BigEndian.PutUint16(buf[0:2], uint16(dms)) + + copy(buf[2:4], []byte{0x0, 0x0}) + + ma16 := m.MulticastAddress.To16() + if ma16 == nil { + return fmt.Errorf("invalid multicast address '%s'", m.MulticastAddress) + } + copy(buf[4:20], ma16) + + return nil +} + +// Sums this layer up nicely formatted +func (m *MLDv1Message) String() string { + return fmt.Sprintf( + "Maximum Response Delay: %dms, Multicast Address: %s", + m.MaximumResponseDelay/time.Millisecond, + m.MulticastAddress) +} + +// MLDv1MulticastListenerQueryMessage are sent by the router to determine +// whether there are multicast listeners on the link. +// https://tools.ietf.org/html/rfc2710 Page 5 +type MLDv1MulticastListenerQueryMessage struct { + MLDv1Message +} + +// DecodeFromBytes decodes the given bytes into this layer. +func (m *MLDv1MulticastListenerQueryMessage) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + err := m.MLDv1Message.DecodeFromBytes(data, df) + if err != nil { + return err + } + + if len(data) > 20 { + m.Payload = data[20:] + } + + return nil +} + +// LayerType returns LayerTypeMLDv1MulticastListenerQuery. +func (*MLDv1MulticastListenerQueryMessage) LayerType() gopacket.LayerType { + return LayerTypeMLDv1MulticastListenerQuery +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (*MLDv1MulticastListenerQueryMessage) CanDecode() gopacket.LayerClass { + return LayerTypeMLDv1MulticastListenerQuery +} + +// IsGeneralQuery is true when this is a general query. +// In a Query message, the Multicast Address field is set to zero when +// sending a General Query. +// https://tools.ietf.org/html/rfc2710#section-3.6 +func (m *MLDv1MulticastListenerQueryMessage) IsGeneralQuery() bool { + return net.IPv6zero.Equal(m.MulticastAddress) +} + +// IsSpecificQuery is true when this is not a general query. +// In a Query message, the Multicast Address field is set to a specific +// IPv6 multicast address when sending a Multicast-Address-Specific Query. +// https://tools.ietf.org/html/rfc2710#section-3.6 +func (m *MLDv1MulticastListenerQueryMessage) IsSpecificQuery() bool { + return !m.IsGeneralQuery() +} + +// MLDv1MulticastListenerReportMessage is sent by a client listening on +// a specific multicast address to indicate that it is (still) listening +// on the specific multicast address. +// https://tools.ietf.org/html/rfc2710 Page 6 +type MLDv1MulticastListenerReportMessage struct { + MLDv1Message +} + +// LayerType returns LayerTypeMLDv1MulticastListenerReport. +func (*MLDv1MulticastListenerReportMessage) LayerType() gopacket.LayerType { + return LayerTypeMLDv1MulticastListenerReport +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (*MLDv1MulticastListenerReportMessage) CanDecode() gopacket.LayerClass { + return LayerTypeMLDv1MulticastListenerReport +} + +// MLDv1MulticastListenerDoneMessage should be sent by a client when it ceases +// to listen to a multicast address on an interface. +// https://tools.ietf.org/html/rfc2710 Page 7 +type MLDv1MulticastListenerDoneMessage struct { + MLDv1Message +} + +// LayerType returns LayerTypeMLDv1MulticastListenerDone. +func (*MLDv1MulticastListenerDoneMessage) LayerType() gopacket.LayerType { + return LayerTypeMLDv1MulticastListenerDone +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (*MLDv1MulticastListenerDoneMessage) CanDecode() gopacket.LayerClass { + return LayerTypeMLDv1MulticastListenerDone +} + +func decodeMLDv1MulticastListenerReport(data []byte, p gopacket.PacketBuilder) error { + m := &MLDv1MulticastListenerReportMessage{} + return decodingLayerDecoder(m, data, p) +} + +func decodeMLDv1MulticastListenerQuery(data []byte, p gopacket.PacketBuilder) error { + m := &MLDv1MulticastListenerQueryMessage{} + return decodingLayerDecoder(m, data, p) +} + +func decodeMLDv1MulticastListenerDone(data []byte, p gopacket.PacketBuilder) error { + m := &MLDv1MulticastListenerDoneMessage{} + return decodingLayerDecoder(m, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/mldv2.go b/backend/vendor/github.com/google/gopacket/layers/mldv2.go new file mode 100644 index 0000000..05100a5 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/mldv2.go @@ -0,0 +1,619 @@ +// Copyright 2018 GoPacket Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + "math" + "net" + "time" + + "github.com/google/gopacket" +) + +const ( + // S Flag bit is 1 + mldv2STrue uint8 = 0x8 + + // S Flag value mask + // mldv2STrue & mldv2SMask == mldv2STrue // true + // 0x1 & mldv2SMask == mldv2STrue // true + // 0x0 & mldv2SMask == mldv2STrue // false + mldv2SMask uint8 = 0x8 + + // QRV value mask + mldv2QRVMask uint8 = 0x7 +) + +// MLDv2MulticastListenerQueryMessage are sent by multicast routers to query the +// multicast listening state of neighboring interfaces. +// https://tools.ietf.org/html/rfc3810#section-5.1 +// +// Some information, like Maximum Response Code and Multicast Address are in the +// previous layer LayerTypeMLDv1MulticastListenerQuery +type MLDv2MulticastListenerQueryMessage struct { + BaseLayer + // 5.1.3. Maximum Response Delay COde + MaximumResponseCode uint16 + // 5.1.5. Multicast Address + // Zero in general query + // Specific IPv6 multicast address otherwise + MulticastAddress net.IP + // 5.1.7. S Flag (Suppress Router-Side Processing) + SuppressRoutersideProcessing bool + // 5.1.8. QRV (Querier's Robustness Variable) + QueriersRobustnessVariable uint8 + // 5.1.9. QQIC (Querier's Query Interval Code) + QueriersQueryIntervalCode uint8 + // 5.1.10. Number of Sources (N) + NumberOfSources uint16 + // 5.1.11 Source Address [i] + SourceAddresses []net.IP +} + +// DecodeFromBytes decodes the given bytes into this layer. +func (m *MLDv2MulticastListenerQueryMessage) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 24 { + df.SetTruncated() + return errors.New("ICMP layer less than 24 bytes for Multicast Listener Query Message V2") + } + + m.MaximumResponseCode = binary.BigEndian.Uint16(data[0:2]) + // ignore data[2:4] as per https://tools.ietf.org/html/rfc3810#section-5.1.4 + m.MulticastAddress = data[4:20] + m.SuppressRoutersideProcessing = (data[20] & mldv2SMask) == mldv2STrue + m.QueriersRobustnessVariable = data[20] & mldv2QRVMask + m.QueriersQueryIntervalCode = data[21] + + m.NumberOfSources = binary.BigEndian.Uint16(data[22:24]) + + var end int + for i := uint16(0); i < m.NumberOfSources; i++ { + begin := 24 + (int(i) * 16) + end = begin + 16 + + if end > len(data) { + df.SetTruncated() + return fmt.Errorf("ICMP layer less than %d bytes for Multicast Listener Query Message V2", end) + } + + m.SourceAddresses = append(m.SourceAddresses, data[begin:end]) + } + + return nil +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (*MLDv2MulticastListenerQueryMessage) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypeZero +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (m *MLDv2MulticastListenerQueryMessage) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + if err := m.serializeSourceAddressesTo(b, opts); err != nil { + return err + } + + buf, err := b.PrependBytes(24) + if err != nil { + return err + } + + binary.BigEndian.PutUint16(buf[0:2], m.MaximumResponseCode) + copy(buf[2:4], []byte{0x00, 0x00}) // set reserved bytes to zero + + ma16 := m.MulticastAddress.To16() + if ma16 == nil { + return fmt.Errorf("invalid MulticastAddress '%s'", m.MulticastAddress) + } + copy(buf[4:20], ma16) + + byte20 := m.QueriersRobustnessVariable & mldv2QRVMask + if m.SuppressRoutersideProcessing { + byte20 |= mldv2STrue + } else { + byte20 &= ^mldv2STrue // the complement of mldv2STrue + } + byte20 &= 0x0F // set reserved bits to zero + buf[20] = byte20 + + binary.BigEndian.PutUint16(buf[22:24], m.NumberOfSources) + buf[21] = m.QueriersQueryIntervalCode + + return nil +} + +// writes each source address to the buffer preserving the order +func (m *MLDv2MulticastListenerQueryMessage) serializeSourceAddressesTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + numberOfSourceAddresses := len(m.SourceAddresses) + if numberOfSourceAddresses > math.MaxUint16 { + return fmt.Errorf( + "there are more than %d source addresses, but 65535 is the maximum number of supported addresses", + numberOfSourceAddresses) + } + + if opts.FixLengths { + m.NumberOfSources = uint16(numberOfSourceAddresses) + } + + lastSAIdx := numberOfSourceAddresses - 1 + for k := range m.SourceAddresses { + i := lastSAIdx - k // reverse order + + buf, err := b.PrependBytes(16) + if err != nil { + return err + } + + sa16 := m.SourceAddresses[i].To16() + if sa16 == nil { + return fmt.Errorf("invalid source address [%d] '%s'", i, m.SourceAddresses[i]) + } + copy(buf[0:16], sa16) + } + + return nil +} + +// String sums this layer up nicely formatted +func (m *MLDv2MulticastListenerQueryMessage) String() string { + return fmt.Sprintf( + "Maximum Response Code: %#x (%dms), Multicast Address: %s, Suppress Routerside Processing: %t, QRV: %#x, QQIC: %#x (%ds), Number of Source Address: %d (actual: %d), Source Addresses: %s", + m.MaximumResponseCode, + m.MaximumResponseDelay(), + m.MulticastAddress, + m.SuppressRoutersideProcessing, + m.QueriersRobustnessVariable, + m.QueriersQueryIntervalCode, + m.QQI()/time.Second, + m.NumberOfSources, + len(m.SourceAddresses), + m.SourceAddresses) +} + +// LayerType returns LayerTypeMLDv2MulticastListenerQuery. +func (*MLDv2MulticastListenerQueryMessage) LayerType() gopacket.LayerType { + return LayerTypeMLDv2MulticastListenerQuery +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (*MLDv2MulticastListenerQueryMessage) CanDecode() gopacket.LayerClass { + return LayerTypeMLDv2MulticastListenerQuery +} + +// QQI calculates the Querier's Query Interval based on the QQIC +// according to https://tools.ietf.org/html/rfc3810#section-5.1.9 +func (m *MLDv2MulticastListenerQueryMessage) QQI() time.Duration { + data := m.QueriersQueryIntervalCode + if data < 128 { + return time.Second * time.Duration(data) + } + + exp := uint16(data) & 0x70 >> 4 + mant := uint16(data) & 0x0F + return time.Second * time.Duration(mant|0x1000<<(exp+3)) +} + +// SetQQI calculates and updates the Querier's Query Interval Code (QQIC) +// according to https://tools.ietf.org/html/rfc3810#section-5.1.9 +func (m *MLDv2MulticastListenerQueryMessage) SetQQI(d time.Duration) error { + if d < 0 { + m.QueriersQueryIntervalCode = 0 + return errors.New("QQI duration is negative") + } + + if d == 0 { + m.QueriersQueryIntervalCode = 0 + return nil + } + + dms := d / time.Second + if dms < 128 { + m.QueriersQueryIntervalCode = uint8(dms) + } + + if dms > 31744 { // mant=0xF, exp=0x7 + m.QueriersQueryIntervalCode = 0xFF + return fmt.Errorf("QQI duration %ds is, maximum allowed is 31744s", dms) + } + + value := uint16(dms) // ok, because 31744 < math.MaxUint16 + exp := uint8(7) + for mask := uint16(0x4000); exp > 0; exp-- { + if mask&value != 0 { + break + } + + mask >>= 1 + } + + mant := uint8(0x000F & (value >> (exp + 3))) + sig := uint8(0x10) + m.QueriersQueryIntervalCode = sig | exp<<4 | mant + + return nil +} + +// MaximumResponseDelay returns the Maximum Response Delay based on the +// Maximum Response Code according to +// https://tools.ietf.org/html/rfc3810#section-5.1.3 +func (m *MLDv2MulticastListenerQueryMessage) MaximumResponseDelay() time.Duration { + if m.MaximumResponseCode < 0x8000 { + return time.Duration(m.MaximumResponseCode) + } + + exp := m.MaximumResponseCode & 0x7000 >> 12 + mant := m.MaximumResponseCode & 0x0FFF + + return time.Millisecond * time.Duration(mant|0x1000<<(exp+3)) +} + +// SetMLDv2MaximumResponseDelay updates the Maximum Response Code according to +// https://tools.ietf.org/html/rfc3810#section-5.1.3 +func (m *MLDv2MulticastListenerQueryMessage) SetMLDv2MaximumResponseDelay(d time.Duration) error { + if d == 0 { + m.MaximumResponseCode = 0 + return nil + } + + if d < 0 { + return errors.New("maximum response delay must not be negative") + } + + dms := d / time.Millisecond + + if dms < 32768 { + m.MaximumResponseCode = uint16(dms) + } + + if dms > 4193280 { // mant=0xFFF, exp=0x7 + return fmt.Errorf("maximum response delay %dms is bigger the than maximum of 4193280ms", dms) + } + + value := uint32(dms) // ok, because 4193280 < math.MaxUint32 + exp := uint8(7) + for mask := uint32(0x40000000); exp > 0; exp-- { + if mask&value != 0 { + break + } + + mask >>= 1 + } + + mant := uint16(0x00000FFF & (value >> (exp + 3))) + sig := uint16(0x1000) + m.MaximumResponseCode = sig | uint16(exp)<<12 | mant + return nil +} + +// MLDv2MulticastListenerReportMessage is sent by an IP node to report the +// current multicast listening state, or changes therein. +// https://tools.ietf.org/html/rfc3810#section-5.2 +type MLDv2MulticastListenerReportMessage struct { + BaseLayer + // 5.2.3. Nr of Mcast Address Records + NumberOfMulticastAddressRecords uint16 + // 5.2.4. Multicast Address Record [i] + MulticastAddressRecords []MLDv2MulticastAddressRecord +} + +// DecodeFromBytes decodes the given bytes into this layer. +func (m *MLDv2MulticastListenerReportMessage) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 4 { + df.SetTruncated() + return errors.New("ICMP layer less than 4 bytes for Multicast Listener Report Message V2") + } + + // ignore data[0:2] as per RFC + // https://tools.ietf.org/html/rfc3810#section-5.2.1 + m.NumberOfMulticastAddressRecords = binary.BigEndian.Uint16(data[2:4]) + + begin := 4 + for i := uint16(0); i < m.NumberOfMulticastAddressRecords; i++ { + mar := MLDv2MulticastAddressRecord{} + read, err := mar.decode(data[begin:], df) + if err != nil { + return err + } + + m.MulticastAddressRecords = append(m.MulticastAddressRecords, mar) + + begin += read + } + + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (m *MLDv2MulticastListenerReportMessage) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + lastItemIdx := len(m.MulticastAddressRecords) - 1 + for k := range m.MulticastAddressRecords { + i := lastItemIdx - k // reverse order + + err := m.MulticastAddressRecords[i].serializeTo(b, opts) + if err != nil { + return err + } + } + + if opts.FixLengths { + numberOfMAR := len(m.MulticastAddressRecords) + if numberOfMAR > math.MaxUint16 { + return fmt.Errorf( + "%d multicast address records added, but the maximum is 65535", + numberOfMAR) + } + + m.NumberOfMulticastAddressRecords = uint16(numberOfMAR) + } + + buf, err := b.PrependBytes(4) + if err != nil { + return err + } + + copy(buf[0:2], []byte{0x0, 0x0}) + binary.BigEndian.PutUint16(buf[2:4], m.NumberOfMulticastAddressRecords) + return nil +} + +// Sums this layer up nicely formatted +func (m *MLDv2MulticastListenerReportMessage) String() string { + return fmt.Sprintf( + "Number of Mcast Addr Records: %d (actual %d), Multicast Address Records: %+v", + m.NumberOfMulticastAddressRecords, + len(m.MulticastAddressRecords), + m.MulticastAddressRecords) +} + +// LayerType returns LayerTypeMLDv2MulticastListenerQuery. +func (*MLDv2MulticastListenerReportMessage) LayerType() gopacket.LayerType { + return LayerTypeMLDv2MulticastListenerReport +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (*MLDv2MulticastListenerReportMessage) CanDecode() gopacket.LayerClass { + return LayerTypeMLDv2MulticastListenerReport +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (*MLDv2MulticastListenerReportMessage) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +// MLDv2MulticastAddressRecordType holds the type of a +// Multicast Address Record, according to +// https://tools.ietf.org/html/rfc3810#section-5.2.5 and +// https://tools.ietf.org/html/rfc3810#section-5.2.12 +type MLDv2MulticastAddressRecordType uint8 + +const ( + // MLDv2MulticastAddressRecordTypeModeIsIncluded stands for + // MODE_IS_INCLUDE - indicates that the interface has a filter + // mode of INCLUDE for the specified multicast address. + MLDv2MulticastAddressRecordTypeModeIsIncluded MLDv2MulticastAddressRecordType = 1 + // MLDv2MulticastAddressRecordTypeModeIsExcluded stands for + // MODE_IS_EXCLUDE - indicates that the interface has a filter + // mode of EXCLUDE for the specified multicast address. + MLDv2MulticastAddressRecordTypeModeIsExcluded MLDv2MulticastAddressRecordType = 2 + // MLDv2MulticastAddressRecordTypeChangeToIncludeMode stands for + // CHANGE_TO_INCLUDE_MODE - indicates that the interface has + // changed to INCLUDE filter mode for the specified multicast + // address. + MLDv2MulticastAddressRecordTypeChangeToIncludeMode MLDv2MulticastAddressRecordType = 3 + // MLDv2MulticastAddressRecordTypeChangeToExcludeMode stands for + // CHANGE_TO_EXCLUDE_MODE - indicates that the interface has + // changed to EXCLUDE filter mode for the specified multicast + // address + MLDv2MulticastAddressRecordTypeChangeToExcludeMode MLDv2MulticastAddressRecordType = 4 + // MLDv2MulticastAddressRecordTypeAllowNewSources stands for + // ALLOW_NEW_SOURCES - indicates that the Source Address [i] + // fields in this Multicast Address Record contain a list of + // the additional sources that the node wishes to listen to, + // for packets sent to the specified multicast address. + MLDv2MulticastAddressRecordTypeAllowNewSources MLDv2MulticastAddressRecordType = 5 + // MLDv2MulticastAddressRecordTypeBlockOldSources stands for + // BLOCK_OLD_SOURCES - indicates that the Source Address [i] + // fields in this Multicast Address Record contain a list of + // the sources that the node no longer wishes to listen to, + // for packets sent to the specified multicast address. + MLDv2MulticastAddressRecordTypeBlockOldSources MLDv2MulticastAddressRecordType = 6 +) + +// Human readable record types +// Naming follows https://tools.ietf.org/html/rfc3810#section-5.2.12 +func (m MLDv2MulticastAddressRecordType) String() string { + switch m { + case MLDv2MulticastAddressRecordTypeModeIsIncluded: + return "MODE_IS_INCLUDE" + case MLDv2MulticastAddressRecordTypeModeIsExcluded: + return "MODE_IS_EXCLUDE" + case MLDv2MulticastAddressRecordTypeChangeToIncludeMode: + return "CHANGE_TO_INCLUDE_MODE" + case MLDv2MulticastAddressRecordTypeChangeToExcludeMode: + return "CHANGE_TO_EXCLUDE_MODE" + case MLDv2MulticastAddressRecordTypeAllowNewSources: + return "ALLOW_NEW_SOURCES" + case MLDv2MulticastAddressRecordTypeBlockOldSources: + return "BLOCK_OLD_SOURCES" + default: + return fmt.Sprintf("UNKNOWN(%d)", m) + } +} + +// MLDv2MulticastAddressRecord contains information on the sender listening to a +// single multicast address on the interface the report is sent. +// https://tools.ietf.org/html/rfc3810#section-5.2.4 +type MLDv2MulticastAddressRecord struct { + // 5.2.5. Record Type + RecordType MLDv2MulticastAddressRecordType + // 5.2.6. Auxiliary Data Length (number of 32-bit words) + AuxDataLen uint8 + // 5.2.7. Number Of Sources (N) + N uint16 + // 5.2.8. Multicast Address + MulticastAddress net.IP + // 5.2.9 Source Address [i] + SourceAddresses []net.IP + // 5.2.10 Auxiliary Data + AuxiliaryData []byte +} + +// decodes a multicast address record from bytes +func (m *MLDv2MulticastAddressRecord) decode(data []byte, df gopacket.DecodeFeedback) (int, error) { + if len(data) < 20 { + df.SetTruncated() + return 0, errors.New( + "Multicast Listener Report Message V2 layer less than 4 bytes for Multicast Address Record") + } + + m.RecordType = MLDv2MulticastAddressRecordType(data[0]) + m.AuxDataLen = data[1] + m.N = binary.BigEndian.Uint16(data[2:4]) + m.MulticastAddress = data[4:20] + + for i := uint16(0); i < m.N; i++ { + begin := 20 + (int(i) * 16) + end := begin + 16 + + if len(data) < end { + df.SetTruncated() + return begin, fmt.Errorf( + "Multicast Listener Report Message V2 layer less than %d bytes for Multicast Address Record", end) + } + + m.SourceAddresses = append(m.SourceAddresses, data[begin:end]) + } + + expectedLengthWithouAuxData := 20 + (int(m.N) * 16) + expectedTotalLength := (int(m.AuxDataLen) * 4) + expectedLengthWithouAuxData // *4 because AuxDataLen are 32bit words + if len(data) < expectedTotalLength { + return expectedLengthWithouAuxData, fmt.Errorf( + "Multicast Listener Report Message V2 layer less than %d bytes for Multicast Address Record", + expectedLengthWithouAuxData) + } + + m.AuxiliaryData = data[expectedLengthWithouAuxData:expectedTotalLength] + + return expectedTotalLength, nil +} + +// String sums this layer up nicely formatted +func (m *MLDv2MulticastAddressRecord) String() string { + return fmt.Sprintf( + "RecordType: %d (%s), AuxDataLen: %d [32-bit words], N: %d, Multicast Address: %s, SourceAddresses: %s, Auxiliary Data: %#x", + m.RecordType, + m.RecordType.String(), + m.AuxDataLen, + m.N, + m.MulticastAddress.To16(), + m.SourceAddresses, + m.AuxiliaryData) +} + +// serializes a multicast address record +func (m *MLDv2MulticastAddressRecord) serializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + if err := m.serializeAuxiliaryDataTo(b, opts); err != nil { + return err + } + + if err := m.serializeSourceAddressesTo(b, opts); err != nil { + return err + } + + buf, err := b.PrependBytes(20) + if err != nil { + return err + } + + buf[0] = uint8(m.RecordType) + buf[1] = m.AuxDataLen + binary.BigEndian.PutUint16(buf[2:4], m.N) + + ma16 := m.MulticastAddress.To16() + if ma16 == nil { + return fmt.Errorf("invalid multicast address '%s'", m.MulticastAddress) + } + copy(buf[4:20], ma16) + + return nil +} + +// serializes the auxiliary data of a multicast address record +func (m *MLDv2MulticastAddressRecord) serializeAuxiliaryDataTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + if remainder := len(m.AuxiliaryData) % 4; remainder != 0 { + zeroWord := []byte{0x0, 0x0, 0x0, 0x0} + m.AuxiliaryData = append(m.AuxiliaryData, zeroWord[:remainder]...) + } + + if opts.FixLengths { + auxDataLen := len(m.AuxiliaryData) / 4 + + if auxDataLen > math.MaxUint8 { + return fmt.Errorf("auxilary data is %d 32-bit words, but the maximum is 255 32-bit words", auxDataLen) + } + + m.AuxDataLen = uint8(auxDataLen) + } + + buf, err := b.PrependBytes(len(m.AuxiliaryData)) + if err != nil { + return err + } + + copy(buf, m.AuxiliaryData) + return nil +} + +// serializes the source addresses of a multicast address record preserving the order +func (m *MLDv2MulticastAddressRecord) serializeSourceAddressesTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + if opts.FixLengths { + numberOfSourceAddresses := len(m.SourceAddresses) + + if numberOfSourceAddresses > math.MaxUint16 { + return fmt.Errorf( + "%d source addresses added, but the maximum is 65535", + numberOfSourceAddresses) + } + + m.N = uint16(numberOfSourceAddresses) + } + + lastItemIdx := len(m.SourceAddresses) - 1 + for k := range m.SourceAddresses { + i := lastItemIdx - k // reverse order + + buf, err := b.PrependBytes(16) + if err != nil { + return err + } + + sa16 := m.SourceAddresses[i].To16() + if sa16 == nil { + return fmt.Errorf("invalid source address [%d] '%s'", i, m.SourceAddresses[i]) + } + copy(buf, sa16) + } + + return nil +} + +func decodeMLDv2MulticastListenerReport(data []byte, p gopacket.PacketBuilder) error { + m := &MLDv2MulticastListenerReportMessage{} + return decodingLayerDecoder(m, data, p) +} + +func decodeMLDv2MulticastListenerQuery(data []byte, p gopacket.PacketBuilder) error { + m := &MLDv2MulticastListenerQueryMessage{} + return decodingLayerDecoder(m, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/modbustcp.go b/backend/vendor/github.com/google/gopacket/layers/modbustcp.go new file mode 100644 index 0000000..bafbd74 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/modbustcp.go @@ -0,0 +1,150 @@ +// Copyright 2018, The GoPacket Authors, All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. +// +//****************************************************************************** + +package layers + +import ( + "encoding/binary" + "errors" + "github.com/google/gopacket" +) + +//****************************************************************************** +// +// ModbusTCP Decoding Layer +// ------------------------------------------ +// This file provides a GoPacket decoding layer for ModbusTCP. +// +//****************************************************************************** + +const mbapRecordSizeInBytes int = 7 +const modbusPDUMinimumRecordSizeInBytes int = 2 +const modbusPDUMaximumRecordSizeInBytes int = 253 + +// ModbusProtocol type +type ModbusProtocol uint16 + +// ModbusProtocol known values. +const ( + ModbusProtocolModbus ModbusProtocol = 0 +) + +func (mp ModbusProtocol) String() string { + switch mp { + default: + return "Unknown" + case ModbusProtocolModbus: + return "Modbus" + } +} + +//****************************************************************************** + +// ModbusTCP Type +// -------- +// Type ModbusTCP implements the DecodingLayer interface. Each ModbusTCP object +// represents in a structured form the MODBUS Application Protocol header (MBAP) record present as the TCP +// payload in an ModbusTCP TCP packet. +// +type ModbusTCP struct { + BaseLayer // Stores the packet bytes and payload (Modbus PDU) bytes . + + TransactionIdentifier uint16 // Identification of a MODBUS Request/Response transaction + ProtocolIdentifier ModbusProtocol // It is used for intra-system multiplexing + Length uint16 // Number of following bytes (includes 1 byte for UnitIdentifier + Modbus data length + UnitIdentifier uint8 // Identification of a remote slave connected on a serial line or on other buses +} + +//****************************************************************************** + +// LayerType returns the layer type of the ModbusTCP object, which is LayerTypeModbusTCP. +func (d *ModbusTCP) LayerType() gopacket.LayerType { + return LayerTypeModbusTCP +} + +//****************************************************************************** + +// decodeModbusTCP analyses a byte slice and attempts to decode it as an ModbusTCP +// record of a TCP packet. +// +// If it succeeds, it loads p with information about the packet and returns nil. +// If it fails, it returns an error (non nil). +// +// This function is employed in layertypes.go to register the ModbusTCP layer. +func decodeModbusTCP(data []byte, p gopacket.PacketBuilder) error { + + // Attempt to decode the byte slice. + d := &ModbusTCP{} + err := d.DecodeFromBytes(data, p) + if err != nil { + return err + } + // If the decoding worked, add the layer to the packet and set it + // as the application layer too, if there isn't already one. + p.AddLayer(d) + p.SetApplicationLayer(d) + + return p.NextDecoder(d.NextLayerType()) + +} + +//****************************************************************************** + +// DecodeFromBytes analyses a byte slice and attempts to decode it as an ModbusTCP +// record of a TCP packet. +// +// Upon succeeds, it loads the ModbusTCP object with information about the packet +// and returns nil. +// Upon failure, it returns an error (non nil). +func (d *ModbusTCP) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + + // If the data block is too short to be a MBAP record, then return an error. + if len(data) < mbapRecordSizeInBytes+modbusPDUMinimumRecordSizeInBytes { + df.SetTruncated() + return errors.New("ModbusTCP packet too short") + } + + if len(data) > mbapRecordSizeInBytes+modbusPDUMaximumRecordSizeInBytes { + df.SetTruncated() + return errors.New("ModbusTCP packet too long") + } + + // ModbusTCP type embeds type BaseLayer which contains two fields: + // Contents is supposed to contain the bytes of the data at this level (MPBA). + // Payload is supposed to contain the payload of this level (PDU). + d.BaseLayer = BaseLayer{Contents: data[:mbapRecordSizeInBytes], Payload: data[mbapRecordSizeInBytes:len(data)]} + + // Extract the fields from the block of bytes. + // The fields can just be copied in big endian order. + d.TransactionIdentifier = binary.BigEndian.Uint16(data[:2]) + d.ProtocolIdentifier = ModbusProtocol(binary.BigEndian.Uint16(data[2:4])) + d.Length = binary.BigEndian.Uint16(data[4:6]) + + // Length should have the size of the payload plus one byte (size of UnitIdentifier) + if d.Length != uint16(len(d.BaseLayer.Payload)+1) { + df.SetTruncated() + return errors.New("ModbusTCP packet with wrong field value (Length)") + } + d.UnitIdentifier = uint8(data[6]) + + return nil +} + +//****************************************************************************** + +// NextLayerType returns the layer type of the ModbusTCP payload, which is LayerTypePayload. +func (d *ModbusTCP) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +//****************************************************************************** + +// Payload returns Modbus Protocol Data Unit (PDU) composed by Function Code and Data, it is carried within ModbusTCP packets +func (d *ModbusTCP) Payload() []byte { + return d.BaseLayer.Payload +} diff --git a/backend/vendor/github.com/google/gopacket/layers/mpls.go b/backend/vendor/github.com/google/gopacket/layers/mpls.go new file mode 100644 index 0000000..83079a0 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/mpls.go @@ -0,0 +1,87 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "github.com/google/gopacket" +) + +// MPLS is the MPLS packet header. +type MPLS struct { + BaseLayer + Label uint32 + TrafficClass uint8 + StackBottom bool + TTL uint8 +} + +// LayerType returns gopacket.LayerTypeMPLS. +func (m *MPLS) LayerType() gopacket.LayerType { return LayerTypeMPLS } + +// ProtocolGuessingDecoder attempts to guess the protocol of the bytes it's +// given, then decode the packet accordingly. Its algorithm for guessing is: +// If the packet starts with byte 0x45-0x4F: IPv4 +// If the packet starts with byte 0x60-0x6F: IPv6 +// Otherwise: Error +// See draft-hsmit-isis-aal5mux-00.txt for more detail on this approach. +type ProtocolGuessingDecoder struct{} + +func (ProtocolGuessingDecoder) Decode(data []byte, p gopacket.PacketBuilder) error { + switch data[0] { + // 0x40 | header_len, where header_len is at least 5. + case 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f: + return decodeIPv4(data, p) + // IPv6 can start with any byte whose first 4 bits are 0x6. + case 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f: + return decodeIPv6(data, p) + } + return errors.New("Unable to guess protocol of packet data") +} + +// MPLSPayloadDecoder is the decoder used to data encapsulated by each MPLS +// layer. MPLS contains no type information, so we have to explicitly decide +// which decoder to use. This is initially set to ProtocolGuessingDecoder, our +// simple attempt at guessing protocols based on the first few bytes of data +// available to us. However, if you know that in your environment MPLS always +// encapsulates a specific protocol, you may reset this. +var MPLSPayloadDecoder gopacket.Decoder = ProtocolGuessingDecoder{} + +func decodeMPLS(data []byte, p gopacket.PacketBuilder) error { + decoded := binary.BigEndian.Uint32(data[:4]) + mpls := &MPLS{ + Label: decoded >> 12, + TrafficClass: uint8(decoded>>9) & 0x7, + StackBottom: decoded&0x100 != 0, + TTL: uint8(decoded), + BaseLayer: BaseLayer{data[:4], data[4:]}, + } + p.AddLayer(mpls) + if mpls.StackBottom { + return p.NextDecoder(MPLSPayloadDecoder) + } + return p.NextDecoder(gopacket.DecodeFunc(decodeMPLS)) +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (m *MPLS) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + bytes, err := b.PrependBytes(4) + if err != nil { + return err + } + encoded := m.Label << 12 + encoded |= uint32(m.TrafficClass) << 9 + encoded |= uint32(m.TTL) + if m.StackBottom { + encoded |= 0x100 + } + binary.BigEndian.PutUint32(bytes, encoded) + return nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/ndp.go b/backend/vendor/github.com/google/gopacket/layers/ndp.go new file mode 100644 index 0000000..f7ca1b2 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/ndp.go @@ -0,0 +1,611 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +// Enum types courtesy of... +// http://anonsvn.wireshark.org/wireshark/trunk/epan/dissectors/packet-ndp.c + +package layers + +import ( + "fmt" + "github.com/google/gopacket" + "net" +) + +type NDPChassisType uint8 + +// Nortel Chassis Types +const ( + NDPChassisother NDPChassisType = 1 + NDPChassis3000 NDPChassisType = 2 + NDPChassis3030 NDPChassisType = 3 + NDPChassis2310 NDPChassisType = 4 + NDPChassis2810 NDPChassisType = 5 + NDPChassis2912 NDPChassisType = 6 + NDPChassis2914 NDPChassisType = 7 + NDPChassis271x NDPChassisType = 8 + NDPChassis2813 NDPChassisType = 9 + NDPChassis2814 NDPChassisType = 10 + NDPChassis2915 NDPChassisType = 11 + NDPChassis5000 NDPChassisType = 12 + NDPChassis2813SA NDPChassisType = 13 + NDPChassis2814SA NDPChassisType = 14 + NDPChassis810M NDPChassisType = 15 + NDPChassisEthercell NDPChassisType = 16 + NDPChassis5005 NDPChassisType = 17 + NDPChassisAlcatelEWC NDPChassisType = 18 + NDPChassis2715SA NDPChassisType = 20 + NDPChassis2486 NDPChassisType = 21 + NDPChassis28000series NDPChassisType = 22 + NDPChassis23000series NDPChassisType = 23 + NDPChassis5DN00xseries NDPChassisType = 24 + NDPChassisBayStackEthernet NDPChassisType = 25 + NDPChassis23100series NDPChassisType = 26 + NDPChassis100BaseTHub NDPChassisType = 27 + NDPChassis3000FastEthernet NDPChassisType = 28 + NDPChassisOrionSwitch NDPChassisType = 29 + NDPChassisDDS NDPChassisType = 31 + NDPChassisCentillion6slot NDPChassisType = 32 + NDPChassisCentillion12slot NDPChassisType = 33 + NDPChassisCentillion1slot NDPChassisType = 34 + NDPChassisBayStack301 NDPChassisType = 35 + NDPChassisBayStackTokenRingHub NDPChassisType = 36 + NDPChassisFVCMultimediaSwitch NDPChassisType = 37 + NDPChassisSwitchNode NDPChassisType = 38 + NDPChassisBayStack302Switch NDPChassisType = 39 + NDPChassisBayStack350Switch NDPChassisType = 40 + NDPChassisBayStack150EthernetHub NDPChassisType = 41 + NDPChassisCentillion50NSwitch NDPChassisType = 42 + NDPChassisCentillion50TSwitch NDPChassisType = 43 + NDPChassisBayStack303304Switches NDPChassisType = 44 + NDPChassisBayStack200EthernetHub NDPChassisType = 45 + NDPChassisBayStack25010100EthernetHub NDPChassisType = 46 + NDPChassisBayStack450101001000Switches NDPChassisType = 48 + NDPChassisBayStack41010100Switches NDPChassisType = 49 + NDPChassisPassport1200L3Switch NDPChassisType = 50 + NDPChassisPassport1250L3Switch NDPChassisType = 51 + NDPChassisPassport1100L3Switch NDPChassisType = 52 + NDPChassisPassport1150L3Switch NDPChassisType = 53 + NDPChassisPassport1050L3Switch NDPChassisType = 54 + NDPChassisPassport1051L3Switch NDPChassisType = 55 + NDPChassisPassport8610L3Switch NDPChassisType = 56 + NDPChassisPassport8606L3Switch NDPChassisType = 57 + NDPChassisPassport8010 NDPChassisType = 58 + NDPChassisPassport8006 NDPChassisType = 59 + NDPChassisBayStack670wirelessaccesspoint NDPChassisType = 60 + NDPChassisPassport740 NDPChassisType = 61 + NDPChassisPassport750 NDPChassisType = 62 + NDPChassisPassport790 NDPChassisType = 63 + NDPChassisBusinessPolicySwitch200010100Switches NDPChassisType = 64 + NDPChassisPassport8110L2Switch NDPChassisType = 65 + NDPChassisPassport8106L2Switch NDPChassisType = 66 + NDPChassisBayStack3580GigSwitch NDPChassisType = 67 + NDPChassisBayStack10PowerSupplyUnit NDPChassisType = 68 + NDPChassisBayStack42010100Switch NDPChassisType = 69 + NDPChassisOPTeraMetro1200EthernetServiceModule NDPChassisType = 70 + NDPChassisOPTera8010co NDPChassisType = 71 + NDPChassisOPTera8610coL3Switch NDPChassisType = 72 + NDPChassisOPTera8110coL2Switch NDPChassisType = 73 + NDPChassisOPTera8003 NDPChassisType = 74 + NDPChassisOPTera8603L3Switch NDPChassisType = 75 + NDPChassisOPTera8103L2Switch NDPChassisType = 76 + NDPChassisBayStack380101001000Switch NDPChassisType = 77 + NDPChassisEthernetSwitch47048T NDPChassisType = 78 + NDPChassisOPTeraMetro1450EthernetServiceModule NDPChassisType = 79 + NDPChassisOPTeraMetro1400EthernetServiceModule NDPChassisType = 80 + NDPChassisAlteonSwitchFamily NDPChassisType = 81 + NDPChassisEthernetSwitch46024TPWR NDPChassisType = 82 + NDPChassisOPTeraMetro8010OPML2Switch NDPChassisType = 83 + NDPChassisOPTeraMetro8010coOPML2Switch NDPChassisType = 84 + NDPChassisOPTeraMetro8006OPML2Switch NDPChassisType = 85 + NDPChassisOPTeraMetro8003OPML2Switch NDPChassisType = 86 + NDPChassisAlteon180e NDPChassisType = 87 + NDPChassisAlteonAD3 NDPChassisType = 88 + NDPChassisAlteon184 NDPChassisType = 89 + NDPChassisAlteonAD4 NDPChassisType = 90 + NDPChassisPassport1424L3Switch NDPChassisType = 91 + NDPChassisPassport1648L3Switch NDPChassisType = 92 + NDPChassisPassport1612L3Switch NDPChassisType = 93 + NDPChassisPassport1624L3Switch NDPChassisType = 94 + NDPChassisBayStack38024FFiber1000Switch NDPChassisType = 95 + NDPChassisEthernetRoutingSwitch551024T NDPChassisType = 96 + NDPChassisEthernetRoutingSwitch551048T NDPChassisType = 97 + NDPChassisEthernetSwitch47024T NDPChassisType = 98 + NDPChassisNortelNetworksWirelessLANAccessPoint2220 NDPChassisType = 99 + NDPChassisPassportRBS2402L3Switch NDPChassisType = 100 + NDPChassisAlteonApplicationSwitch2424 NDPChassisType = 101 + NDPChassisAlteonApplicationSwitch2224 NDPChassisType = 102 + NDPChassisAlteonApplicationSwitch2208 NDPChassisType = 103 + NDPChassisAlteonApplicationSwitch2216 NDPChassisType = 104 + NDPChassisAlteonApplicationSwitch3408 NDPChassisType = 105 + NDPChassisAlteonApplicationSwitch3416 NDPChassisType = 106 + NDPChassisNortelNetworksWirelessLANSecuritySwitch2250 NDPChassisType = 107 + NDPChassisEthernetSwitch42548T NDPChassisType = 108 + NDPChassisEthernetSwitch42524T NDPChassisType = 109 + NDPChassisNortelNetworksWirelessLANAccessPoint2221 NDPChassisType = 110 + NDPChassisNortelMetroEthernetServiceUnit24TSPFswitch NDPChassisType = 111 + NDPChassisNortelMetroEthernetServiceUnit24TLXDCswitch NDPChassisType = 112 + NDPChassisPassport830010slotchassis NDPChassisType = 113 + NDPChassisPassport83006slotchassis NDPChassisType = 114 + NDPChassisEthernetRoutingSwitch552024TPWR NDPChassisType = 115 + NDPChassisEthernetRoutingSwitch552048TPWR NDPChassisType = 116 + NDPChassisNortelNetworksVPNGateway3050 NDPChassisType = 117 + NDPChassisAlteonSSL31010100 NDPChassisType = 118 + NDPChassisAlteonSSL31010100Fiber NDPChassisType = 119 + NDPChassisAlteonSSL31010100FIPS NDPChassisType = 120 + NDPChassisAlteonSSL410101001000 NDPChassisType = 121 + NDPChassisAlteonSSL410101001000Fiber NDPChassisType = 122 + NDPChassisAlteonApplicationSwitch2424SSL NDPChassisType = 123 + NDPChassisEthernetSwitch32524T NDPChassisType = 124 + NDPChassisEthernetSwitch32524G NDPChassisType = 125 + NDPChassisNortelNetworksWirelessLANAccessPoint2225 NDPChassisType = 126 + NDPChassisNortelNetworksWirelessLANSecuritySwitch2270 NDPChassisType = 127 + NDPChassis24portEthernetSwitch47024TPWR NDPChassisType = 128 + NDPChassis48portEthernetSwitch47048TPWR NDPChassisType = 129 + NDPChassisEthernetRoutingSwitch553024TFD NDPChassisType = 130 + NDPChassisEthernetSwitch351024T NDPChassisType = 131 + NDPChassisNortelMetroEthernetServiceUnit12GACL3Switch NDPChassisType = 132 + NDPChassisNortelMetroEthernetServiceUnit12GDCL3Switch NDPChassisType = 133 + NDPChassisNortelSecureAccessSwitch NDPChassisType = 134 + NDPChassisNortelNetworksVPNGateway3070 NDPChassisType = 135 + NDPChassisOPTeraMetro3500 NDPChassisType = 136 + NDPChassisSMBBES101024T NDPChassisType = 137 + NDPChassisSMBBES101048T NDPChassisType = 138 + NDPChassisSMBBES102024TPWR NDPChassisType = 139 + NDPChassisSMBBES102048TPWR NDPChassisType = 140 + NDPChassisSMBBES201024T NDPChassisType = 141 + NDPChassisSMBBES201048T NDPChassisType = 142 + NDPChassisSMBBES202024TPWR NDPChassisType = 143 + NDPChassisSMBBES202048TPWR NDPChassisType = 144 + NDPChassisSMBBES11024T NDPChassisType = 145 + NDPChassisSMBBES11048T NDPChassisType = 146 + NDPChassisSMBBES12024TPWR NDPChassisType = 147 + NDPChassisSMBBES12048TPWR NDPChassisType = 148 + NDPChassisSMBBES21024T NDPChassisType = 149 + NDPChassisSMBBES21048T NDPChassisType = 150 + NDPChassisSMBBES22024TPWR NDPChassisType = 151 + NDPChassisSMBBES22048TPWR NDPChassisType = 152 + NDPChassisOME6500 NDPChassisType = 153 + NDPChassisEthernetRoutingSwitch4548GT NDPChassisType = 154 + NDPChassisEthernetRoutingSwitch4548GTPWR NDPChassisType = 155 + NDPChassisEthernetRoutingSwitch4550T NDPChassisType = 156 + NDPChassisEthernetRoutingSwitch4550TPWR NDPChassisType = 157 + NDPChassisEthernetRoutingSwitch4526FX NDPChassisType = 158 + NDPChassisEthernetRoutingSwitch250026T NDPChassisType = 159 + NDPChassisEthernetRoutingSwitch250026TPWR NDPChassisType = 160 + NDPChassisEthernetRoutingSwitch250050T NDPChassisType = 161 + NDPChassisEthernetRoutingSwitch250050TPWR NDPChassisType = 162 +) + +type NDPBackplaneType uint8 + +// Nortel Backplane Types +const ( + NDPBackplaneOther NDPBackplaneType = 1 + NDPBackplaneEthernet NDPBackplaneType = 2 + NDPBackplaneEthernetTokenring NDPBackplaneType = 3 + NDPBackplaneEthernetFDDI NDPBackplaneType = 4 + NDPBackplaneEthernetTokenringFDDI NDPBackplaneType = 5 + NDPBackplaneEthernetTokenringRedundantPower NDPBackplaneType = 6 + NDPBackplaneEthernetTokenringFDDIRedundantPower NDPBackplaneType = 7 + NDPBackplaneTokenRing NDPBackplaneType = 8 + NDPBackplaneEthernetTokenringFastEthernet NDPBackplaneType = 9 + NDPBackplaneEthernetFastEthernet NDPBackplaneType = 10 + NDPBackplaneEthernetTokenringFastEthernetRedundantPower NDPBackplaneType = 11 + NDPBackplaneEthernetFastEthernetGigabitEthernet NDPBackplaneType = 12 +) + +type NDPState uint8 + +// Device State +const ( + NDPStateTopology NDPState = 1 + NDPStateHeartbeat NDPState = 2 + NDPStateNew NDPState = 3 +) + +// NortelDiscovery is a packet layer containing the Nortel Discovery Protocol. +type NortelDiscovery struct { + BaseLayer + IPAddress net.IP + SegmentID []byte + Chassis NDPChassisType + Backplane NDPBackplaneType + State NDPState + NumLinks uint8 +} + +// LayerType returns gopacket.LayerTypeNortelDiscovery. +func (c *NortelDiscovery) LayerType() gopacket.LayerType { + return LayerTypeNortelDiscovery +} + +func decodeNortelDiscovery(data []byte, p gopacket.PacketBuilder) error { + c := &NortelDiscovery{} + if len(data) < 11 { + return fmt.Errorf("Invalid NortelDiscovery packet length %d", len(data)) + } + c.IPAddress = data[0:4] + c.SegmentID = data[4:7] + c.Chassis = NDPChassisType(data[7]) + c.Backplane = NDPBackplaneType(data[8]) + c.State = NDPState(data[9]) + c.NumLinks = uint8(data[10]) + p.AddLayer(c) + return nil +} + +func (t NDPChassisType) String() (s string) { + switch t { + case NDPChassisother: + s = "other" + case NDPChassis3000: + s = "3000" + case NDPChassis3030: + s = "3030" + case NDPChassis2310: + s = "2310" + case NDPChassis2810: + s = "2810" + case NDPChassis2912: + s = "2912" + case NDPChassis2914: + s = "2914" + case NDPChassis271x: + s = "271x" + case NDPChassis2813: + s = "2813" + case NDPChassis2814: + s = "2814" + case NDPChassis2915: + s = "2915" + case NDPChassis5000: + s = "5000" + case NDPChassis2813SA: + s = "2813SA" + case NDPChassis2814SA: + s = "2814SA" + case NDPChassis810M: + s = "810M" + case NDPChassisEthercell: + s = "Ethercell" + case NDPChassis5005: + s = "5005" + case NDPChassisAlcatelEWC: + s = "Alcatel Ethernet workgroup conc." + case NDPChassis2715SA: + s = "2715SA" + case NDPChassis2486: + s = "2486" + case NDPChassis28000series: + s = "28000 series" + case NDPChassis23000series: + s = "23000 series" + case NDPChassis5DN00xseries: + s = "5DN00x series" + case NDPChassisBayStackEthernet: + s = "BayStack Ethernet" + case NDPChassis23100series: + s = "23100 series" + case NDPChassis100BaseTHub: + s = "100Base-T Hub" + case NDPChassis3000FastEthernet: + s = "3000 Fast Ethernet" + case NDPChassisOrionSwitch: + s = "Orion switch" + case NDPChassisDDS: + s = "DDS" + case NDPChassisCentillion6slot: + s = "Centillion (6 slot)" + case NDPChassisCentillion12slot: + s = "Centillion (12 slot)" + case NDPChassisCentillion1slot: + s = "Centillion (1 slot)" + case NDPChassisBayStack301: + s = "BayStack 301" + case NDPChassisBayStackTokenRingHub: + s = "BayStack TokenRing Hub" + case NDPChassisFVCMultimediaSwitch: + s = "FVC Multimedia Switch" + case NDPChassisSwitchNode: + s = "Switch Node" + case NDPChassisBayStack302Switch: + s = "BayStack 302 Switch" + case NDPChassisBayStack350Switch: + s = "BayStack 350 Switch" + case NDPChassisBayStack150EthernetHub: + s = "BayStack 150 Ethernet Hub" + case NDPChassisCentillion50NSwitch: + s = "Centillion 50N switch" + case NDPChassisCentillion50TSwitch: + s = "Centillion 50T switch" + case NDPChassisBayStack303304Switches: + s = "BayStack 303 and 304 Switches" + case NDPChassisBayStack200EthernetHub: + s = "BayStack 200 Ethernet Hub" + case NDPChassisBayStack25010100EthernetHub: + s = "BayStack 250 10/100 Ethernet Hub" + case NDPChassisBayStack450101001000Switches: + s = "BayStack 450 10/100/1000 Switches" + case NDPChassisBayStack41010100Switches: + s = "BayStack 410 10/100 Switches" + case NDPChassisPassport1200L3Switch: + s = "Passport 1200 L3 Switch" + case NDPChassisPassport1250L3Switch: + s = "Passport 1250 L3 Switch" + case NDPChassisPassport1100L3Switch: + s = "Passport 1100 L3 Switch" + case NDPChassisPassport1150L3Switch: + s = "Passport 1150 L3 Switch" + case NDPChassisPassport1050L3Switch: + s = "Passport 1050 L3 Switch" + case NDPChassisPassport1051L3Switch: + s = "Passport 1051 L3 Switch" + case NDPChassisPassport8610L3Switch: + s = "Passport 8610 L3 Switch" + case NDPChassisPassport8606L3Switch: + s = "Passport 8606 L3 Switch" + case NDPChassisPassport8010: + s = "Passport 8010" + case NDPChassisPassport8006: + s = "Passport 8006" + case NDPChassisBayStack670wirelessaccesspoint: + s = "BayStack 670 wireless access point" + case NDPChassisPassport740: + s = "Passport 740" + case NDPChassisPassport750: + s = "Passport 750" + case NDPChassisPassport790: + s = "Passport 790" + case NDPChassisBusinessPolicySwitch200010100Switches: + s = "Business Policy Switch 2000 10/100 Switches" + case NDPChassisPassport8110L2Switch: + s = "Passport 8110 L2 Switch" + case NDPChassisPassport8106L2Switch: + s = "Passport 8106 L2 Switch" + case NDPChassisBayStack3580GigSwitch: + s = "BayStack 3580 Gig Switch" + case NDPChassisBayStack10PowerSupplyUnit: + s = "BayStack 10 Power Supply Unit" + case NDPChassisBayStack42010100Switch: + s = "BayStack 420 10/100 Switch" + case NDPChassisOPTeraMetro1200EthernetServiceModule: + s = "OPTera Metro 1200 Ethernet Service Module" + case NDPChassisOPTera8010co: + s = "OPTera 8010co" + case NDPChassisOPTera8610coL3Switch: + s = "OPTera 8610co L3 switch" + case NDPChassisOPTera8110coL2Switch: + s = "OPTera 8110co L2 switch" + case NDPChassisOPTera8003: + s = "OPTera 8003" + case NDPChassisOPTera8603L3Switch: + s = "OPTera 8603 L3 switch" + case NDPChassisOPTera8103L2Switch: + s = "OPTera 8103 L2 switch" + case NDPChassisBayStack380101001000Switch: + s = "BayStack 380 10/100/1000 Switch" + case NDPChassisEthernetSwitch47048T: + s = "Ethernet Switch 470-48T" + case NDPChassisOPTeraMetro1450EthernetServiceModule: + s = "OPTera Metro 1450 Ethernet Service Module" + case NDPChassisOPTeraMetro1400EthernetServiceModule: + s = "OPTera Metro 1400 Ethernet Service Module" + case NDPChassisAlteonSwitchFamily: + s = "Alteon Switch Family" + case NDPChassisEthernetSwitch46024TPWR: + s = "Ethernet Switch 460-24T-PWR" + case NDPChassisOPTeraMetro8010OPML2Switch: + s = "OPTera Metro 8010 OPM L2 Switch" + case NDPChassisOPTeraMetro8010coOPML2Switch: + s = "OPTera Metro 8010co OPM L2 Switch" + case NDPChassisOPTeraMetro8006OPML2Switch: + s = "OPTera Metro 8006 OPM L2 Switch" + case NDPChassisOPTeraMetro8003OPML2Switch: + s = "OPTera Metro 8003 OPM L2 Switch" + case NDPChassisAlteon180e: + s = "Alteon 180e" + case NDPChassisAlteonAD3: + s = "Alteon AD3" + case NDPChassisAlteon184: + s = "Alteon 184" + case NDPChassisAlteonAD4: + s = "Alteon AD4" + case NDPChassisPassport1424L3Switch: + s = "Passport 1424 L3 switch" + case NDPChassisPassport1648L3Switch: + s = "Passport 1648 L3 switch" + case NDPChassisPassport1612L3Switch: + s = "Passport 1612 L3 switch" + case NDPChassisPassport1624L3Switch: + s = "Passport 1624 L3 switch" + case NDPChassisBayStack38024FFiber1000Switch: + s = "BayStack 380-24F Fiber 1000 Switch" + case NDPChassisEthernetRoutingSwitch551024T: + s = "Ethernet Routing Switch 5510-24T" + case NDPChassisEthernetRoutingSwitch551048T: + s = "Ethernet Routing Switch 5510-48T" + case NDPChassisEthernetSwitch47024T: + s = "Ethernet Switch 470-24T" + case NDPChassisNortelNetworksWirelessLANAccessPoint2220: + s = "Nortel Networks Wireless LAN Access Point 2220" + case NDPChassisPassportRBS2402L3Switch: + s = "Passport RBS 2402 L3 switch" + case NDPChassisAlteonApplicationSwitch2424: + s = "Alteon Application Switch 2424" + case NDPChassisAlteonApplicationSwitch2224: + s = "Alteon Application Switch 2224" + case NDPChassisAlteonApplicationSwitch2208: + s = "Alteon Application Switch 2208" + case NDPChassisAlteonApplicationSwitch2216: + s = "Alteon Application Switch 2216" + case NDPChassisAlteonApplicationSwitch3408: + s = "Alteon Application Switch 3408" + case NDPChassisAlteonApplicationSwitch3416: + s = "Alteon Application Switch 3416" + case NDPChassisNortelNetworksWirelessLANSecuritySwitch2250: + s = "Nortel Networks Wireless LAN SecuritySwitch 2250" + case NDPChassisEthernetSwitch42548T: + s = "Ethernet Switch 425-48T" + case NDPChassisEthernetSwitch42524T: + s = "Ethernet Switch 425-24T" + case NDPChassisNortelNetworksWirelessLANAccessPoint2221: + s = "Nortel Networks Wireless LAN Access Point 2221" + case NDPChassisNortelMetroEthernetServiceUnit24TSPFswitch: + s = "Nortel Metro Ethernet Service Unit 24-T SPF switch" + case NDPChassisNortelMetroEthernetServiceUnit24TLXDCswitch: + s = " Nortel Metro Ethernet Service Unit 24-T LX DC switch" + case NDPChassisPassport830010slotchassis: + s = "Passport 8300 10-slot chassis" + case NDPChassisPassport83006slotchassis: + s = "Passport 8300 6-slot chassis" + case NDPChassisEthernetRoutingSwitch552024TPWR: + s = "Ethernet Routing Switch 5520-24T-PWR" + case NDPChassisEthernetRoutingSwitch552048TPWR: + s = "Ethernet Routing Switch 5520-48T-PWR" + case NDPChassisNortelNetworksVPNGateway3050: + s = "Nortel Networks VPN Gateway 3050" + case NDPChassisAlteonSSL31010100: + s = "Alteon SSL 310 10/100" + case NDPChassisAlteonSSL31010100Fiber: + s = "Alteon SSL 310 10/100 Fiber" + case NDPChassisAlteonSSL31010100FIPS: + s = "Alteon SSL 310 10/100 FIPS" + case NDPChassisAlteonSSL410101001000: + s = "Alteon SSL 410 10/100/1000" + case NDPChassisAlteonSSL410101001000Fiber: + s = "Alteon SSL 410 10/100/1000 Fiber" + case NDPChassisAlteonApplicationSwitch2424SSL: + s = "Alteon Application Switch 2424-SSL" + case NDPChassisEthernetSwitch32524T: + s = "Ethernet Switch 325-24T" + case NDPChassisEthernetSwitch32524G: + s = "Ethernet Switch 325-24G" + case NDPChassisNortelNetworksWirelessLANAccessPoint2225: + s = "Nortel Networks Wireless LAN Access Point 2225" + case NDPChassisNortelNetworksWirelessLANSecuritySwitch2270: + s = "Nortel Networks Wireless LAN SecuritySwitch 2270" + case NDPChassis24portEthernetSwitch47024TPWR: + s = "24-port Ethernet Switch 470-24T-PWR" + case NDPChassis48portEthernetSwitch47048TPWR: + s = "48-port Ethernet Switch 470-48T-PWR" + case NDPChassisEthernetRoutingSwitch553024TFD: + s = "Ethernet Routing Switch 5530-24TFD" + case NDPChassisEthernetSwitch351024T: + s = "Ethernet Switch 3510-24T" + case NDPChassisNortelMetroEthernetServiceUnit12GACL3Switch: + s = "Nortel Metro Ethernet Service Unit 12G AC L3 switch" + case NDPChassisNortelMetroEthernetServiceUnit12GDCL3Switch: + s = "Nortel Metro Ethernet Service Unit 12G DC L3 switch" + case NDPChassisNortelSecureAccessSwitch: + s = "Nortel Secure Access Switch" + case NDPChassisNortelNetworksVPNGateway3070: + s = "Nortel Networks VPN Gateway 3070" + case NDPChassisOPTeraMetro3500: + s = "OPTera Metro 3500" + case NDPChassisSMBBES101024T: + s = "SMB BES 1010 24T" + case NDPChassisSMBBES101048T: + s = "SMB BES 1010 48T" + case NDPChassisSMBBES102024TPWR: + s = "SMB BES 1020 24T PWR" + case NDPChassisSMBBES102048TPWR: + s = "SMB BES 1020 48T PWR" + case NDPChassisSMBBES201024T: + s = "SMB BES 2010 24T" + case NDPChassisSMBBES201048T: + s = "SMB BES 2010 48T" + case NDPChassisSMBBES202024TPWR: + s = "SMB BES 2020 24T PWR" + case NDPChassisSMBBES202048TPWR: + s = "SMB BES 2020 48T PWR" + case NDPChassisSMBBES11024T: + s = "SMB BES 110 24T" + case NDPChassisSMBBES11048T: + s = "SMB BES 110 48T" + case NDPChassisSMBBES12024TPWR: + s = "SMB BES 120 24T PWR" + case NDPChassisSMBBES12048TPWR: + s = "SMB BES 120 48T PWR" + case NDPChassisSMBBES21024T: + s = "SMB BES 210 24T" + case NDPChassisSMBBES21048T: + s = "SMB BES 210 48T" + case NDPChassisSMBBES22024TPWR: + s = "SMB BES 220 24T PWR" + case NDPChassisSMBBES22048TPWR: + s = "SMB BES 220 48T PWR" + case NDPChassisOME6500: + s = "OME 6500" + case NDPChassisEthernetRoutingSwitch4548GT: + s = "Ethernet Routing Switch 4548GT" + case NDPChassisEthernetRoutingSwitch4548GTPWR: + s = "Ethernet Routing Switch 4548GT-PWR" + case NDPChassisEthernetRoutingSwitch4550T: + s = "Ethernet Routing Switch 4550T" + case NDPChassisEthernetRoutingSwitch4550TPWR: + s = "Ethernet Routing Switch 4550T-PWR" + case NDPChassisEthernetRoutingSwitch4526FX: + s = "Ethernet Routing Switch 4526FX" + case NDPChassisEthernetRoutingSwitch250026T: + s = "Ethernet Routing Switch 2500-26T" + case NDPChassisEthernetRoutingSwitch250026TPWR: + s = "Ethernet Routing Switch 2500-26T-PWR" + case NDPChassisEthernetRoutingSwitch250050T: + s = "Ethernet Routing Switch 2500-50T" + case NDPChassisEthernetRoutingSwitch250050TPWR: + s = "Ethernet Routing Switch 2500-50T-PWR" + default: + s = "Unknown" + } + return +} + +func (t NDPBackplaneType) String() (s string) { + switch t { + case NDPBackplaneOther: + s = "Other" + case NDPBackplaneEthernet: + s = "Ethernet" + case NDPBackplaneEthernetTokenring: + s = "Ethernet and Tokenring" + case NDPBackplaneEthernetFDDI: + s = "Ethernet and FDDI" + case NDPBackplaneEthernetTokenringFDDI: + s = "Ethernet, Tokenring and FDDI" + case NDPBackplaneEthernetTokenringRedundantPower: + s = "Ethernet and Tokenring with redundant power" + case NDPBackplaneEthernetTokenringFDDIRedundantPower: + s = "Ethernet, Tokenring, FDDI with redundant power" + case NDPBackplaneTokenRing: + s = "Token Ring" + case NDPBackplaneEthernetTokenringFastEthernet: + s = "Ethernet, Tokenring and Fast Ethernet" + case NDPBackplaneEthernetFastEthernet: + s = "Ethernet and Fast Ethernet" + case NDPBackplaneEthernetTokenringFastEthernetRedundantPower: + s = "Ethernet, Tokenring, Fast Ethernet with redundant power" + case NDPBackplaneEthernetFastEthernetGigabitEthernet: + s = "Ethernet, Fast Ethernet and Gigabit Ethernet" + default: + s = "Unknown" + } + return +} + +func (t NDPState) String() (s string) { + switch t { + case NDPStateTopology: + s = "Topology Change" + case NDPStateHeartbeat: + s = "Heartbeat" + case NDPStateNew: + s = "New" + default: + s = "Unknown" + } + return +} diff --git a/backend/vendor/github.com/google/gopacket/layers/ntp.go b/backend/vendor/github.com/google/gopacket/layers/ntp.go new file mode 100644 index 0000000..33c15b3 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/ntp.go @@ -0,0 +1,416 @@ +// Copyright 2016 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. +// +//****************************************************************************** + +package layers + +import ( + "encoding/binary" + "errors" + + "github.com/google/gopacket" +) + +//****************************************************************************** +// +// Network Time Protocol (NTP) Decoding Layer +// ------------------------------------------ +// This file provides a GoPacket decoding layer for NTP. +// +//****************************************************************************** +// +// About The Network Time Protocol (NTP) +// ------------------------------------- +// NTP is a protocol that enables computers on the internet to set their +// clocks to the correct time (or to a time that is acceptably close to the +// correct time). NTP runs on top of UDP. +// +// There have been a series of versions of the NTP protocol. The latest +// version is V4 and is specified in RFC 5905: +// http://www.ietf.org/rfc/rfc5905.txt +// +//****************************************************************************** +// +// References +// ---------- +// +// Wikipedia's NTP entry: +// https://en.wikipedia.org/wiki/Network_Time_Protocol +// This is the best place to get an overview of NTP. +// +// Network Time Protocol Home Website: +// http://www.ntp.org/ +// This appears to be the official website of NTP. +// +// List of current NTP Protocol RFCs: +// http://www.ntp.org/rfc.html +// +// RFC 958: "Network Time Protocol (NTP)" (1985) +// https://tools.ietf.org/html/rfc958 +// This is the original NTP specification. +// +// RFC 1305: "Network Time Protocol (Version 3) Specification, Implementation and Analysis" (1992) +// https://tools.ietf.org/html/rfc1305 +// The protocol was updated in 1992 yielding NTP V3. +// +// RFC 5905: "Network Time Protocol Version 4: Protocol and Algorithms Specification" (2010) +// https://www.ietf.org/rfc/rfc5905.txt +// The protocol was updated in 2010 yielding NTP V4. +// V4 is backwards compatible with all previous versions of NTP. +// +// RFC 5906: "Network Time Protocol Version 4: Autokey Specification" +// https://tools.ietf.org/html/rfc5906 +// This document addresses the security of the NTP protocol +// and is probably not relevant to this package. +// +// RFC 5907: "Definitions of Managed Objects for Network Time Protocol Version 4 (NTPv4)" +// https://tools.ietf.org/html/rfc5907 +// This document addresses the management of NTP servers and +// is probably not relevant to this package. +// +// RFC 5908: "Network Time Protocol (NTP) Server Option for DHCPv6" +// https://tools.ietf.org/html/rfc5908 +// This document addresses the use of NTP in DHCPv6 and is +// probably not relevant to this package. +// +// "Let's make a NTP Client in C" +// https://lettier.github.io/posts/2016-04-26-lets-make-a-ntp-client-in-c.html +// This web page contains useful information about the details of NTP, +// including an NTP record struture in C, and C code. +// +// "NTP Packet Header (NTP Reference Implementation) (Computer Network Time Synchronization)" +// http://what-when-how.com/computer-network-time-synchronization/ +// ntp-packet-header-ntp-reference-implementation-computer-network-time-synchronization/ +// This web page contains useful information on the details of NTP. +// +// "Technical information - NTP Data Packet" +// https://www.meinbergglobal.com/english/info/ntp-packet.htm +// This page has a helpful diagram of an NTP V4 packet. +// +//****************************************************************************** +// +// Obsolete References +// ------------------- +// +// RFC 1119: "RFC-1119 "Network Time Protocol (Version 2) Specification and Implementation" (1989) +// https://tools.ietf.org/html/rfc1119 +// Version 2 was drafted in 1989. +// It is unclear whether V2 was ever implememented or whether the +// ideas ended up in V3 (which was implemented in 1992). +// +// RFC 1361: "Simple Network Time Protocol (SNTP)" +// https://tools.ietf.org/html/rfc1361 +// This document is obsoleted by RFC 1769 and is included only for completeness. +// +// RFC 1769: "Simple Network Time Protocol (SNTP)" +// https://tools.ietf.org/html/rfc1769 +// This document is obsoleted by RFC 2030 and RFC 4330 and is included only for completeness. +// +// RFC 2030: "Simple Network Time Protocol (SNTP) Version 4 for IPv4, IPv6 and OSI" +// https://tools.ietf.org/html/rfc2030 +// This document is obsoleted by RFC 4330 and is included only for completeness. +// +// RFC 4330: "Simple Network Time Protocol (SNTP) Version 4 for IPv4, IPv6 and OSI" +// https://tools.ietf.org/html/rfc4330 +// This document is obsoleted by RFC 5905 and is included only for completeness. +// +//****************************************************************************** +// +// Endian And Bit Numbering Issues +// ------------------------------- +// +// Endian and bit numbering issues can be confusing. Here is some +// clarification: +// +// ENDIAN: Values are sent big endian. +// https://en.wikipedia.org/wiki/Endianness +// +// BIT NUMBERING: Bits are numbered 0 upwards from the most significant +// bit to the least significant bit. This means that if there is a 32-bit +// value, the most significant bit is called bit 0 and the least +// significant bit is called bit 31. +// +// See RFC 791 Appendix B for more discussion. +// +//****************************************************************************** +// +// NTP V3 and V4 Packet Format +// --------------------------- +// NTP packets are UDP packets whose payload contains an NTP record. +// +// The NTP RFC defines the format of the NTP record. +// +// There have been four versions of the protocol: +// +// V1 in 1985 +// V2 in 1989 +// V3 in 1992 +// V4 in 2010 +// +// It is clear that V1 and V2 are obsolete, and there is no need to +// cater for these formats. +// +// V3 and V4 essentially use the same format, with V4 adding some optional +// fields on the end. So this package supports the V3 and V4 formats. +// +// The current version of NTP (NTP V4)'s RFC (V4 - RFC 5905) contains +// the following diagram for the NTP record format: + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// |LI | VN |Mode | Stratum | Poll | Precision | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Root Delay | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Root Dispersion | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Reference ID | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | | +// + Reference Timestamp (64) + +// | | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | | +// + Origin Timestamp (64) + +// | | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | | +// + Receive Timestamp (64) + +// | | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | | +// + Transmit Timestamp (64) + +// | | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | | +// . . +// . Extension Field 1 (variable) . +// . . +// | | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | | +// . . +// . Extension Field 2 (variable) . +// . . +// | | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Key Identifier | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | | +// | dgst (128) | +// | | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// From http://www.ietf.org/rfc/rfc5905.txt +// +// The fields "Extension Field 1 (variable)" and later are optional fields, +// and so we can set a minimum NTP record size of 48 bytes. +// +const ntpMinimumRecordSizeInBytes int = 48 + +//****************************************************************************** + +// NTP Type +// -------- +// Type NTP implements the DecodingLayer interface. Each NTP object +// represents in a structured form the NTP record present as the UDP +// payload in an NTP UDP packet. +// + +type NTPLeapIndicator uint8 +type NTPVersion uint8 +type NTPMode uint8 +type NTPStratum uint8 +type NTPLog2Seconds int8 +type NTPFixed16Seconds uint32 +type NTPReferenceID uint32 +type NTPTimestamp uint64 + +type NTP struct { + BaseLayer // Stores the packet bytes and payload bytes. + + LeapIndicator NTPLeapIndicator // [0,3]. Indicates whether leap second(s) is to be added. + Version NTPVersion // [0,7]. Version of the NTP protocol. + Mode NTPMode // [0,7]. Mode. + Stratum NTPStratum // [0,255]. Stratum of time server in the server tree. + Poll NTPLog2Seconds // [-128,127]. The maximum interval between successive messages, in log2 seconds. + Precision NTPLog2Seconds // [-128,127]. The precision of the system clock, in log2 seconds. + RootDelay NTPFixed16Seconds // [0,2^32-1]. Total round trip delay to the reference clock in seconds times 2^16. + RootDispersion NTPFixed16Seconds // [0,2^32-1]. Total dispersion to the reference clock, in seconds times 2^16. + ReferenceID NTPReferenceID // ID code of reference clock [0,2^32-1]. + ReferenceTimestamp NTPTimestamp // Most recent timestamp from the reference clock. + OriginTimestamp NTPTimestamp // Local time when request was sent from local host. + ReceiveTimestamp NTPTimestamp // Local time (on server) that request arrived at server host. + TransmitTimestamp NTPTimestamp // Local time (on server) that request departed server host. + + // FIX: This package should analyse the extension fields and represent the extension fields too. + ExtensionBytes []byte // Just put extensions in a byte slice. +} + +//****************************************************************************** + +// LayerType returns the layer type of the NTP object, which is LayerTypeNTP. +func (d *NTP) LayerType() gopacket.LayerType { + return LayerTypeNTP +} + +//****************************************************************************** + +// decodeNTP analyses a byte slice and attempts to decode it as an NTP +// record of a UDP packet. +// +// If it succeeds, it loads p with information about the packet and returns nil. +// If it fails, it returns an error (non nil). +// +// This function is employed in layertypes.go to register the NTP layer. +func decodeNTP(data []byte, p gopacket.PacketBuilder) error { + + // Attempt to decode the byte slice. + d := &NTP{} + err := d.DecodeFromBytes(data, p) + if err != nil { + return err + } + + // If the decoding worked, add the layer to the packet and set it + // as the application layer too, if there isn't already one. + p.AddLayer(d) + p.SetApplicationLayer(d) + + return nil +} + +//****************************************************************************** + +// DecodeFromBytes analyses a byte slice and attempts to decode it as an NTP +// record of a UDP packet. +// +// Upon succeeds, it loads the NTP object with information about the packet +// and returns nil. +// Upon failure, it returns an error (non nil). +func (d *NTP) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + + // If the data block is too short to be a NTP record, then return an error. + if len(data) < ntpMinimumRecordSizeInBytes { + df.SetTruncated() + return errors.New("NTP packet too short") + } + + // RFC 5905 does not appear to define a maximum NTP record length. + // The protocol allows "extension fields" to be included in the record, + // and states about these fields:" + // + // "While the minimum field length containing required fields is + // four words (16 octets), a maximum field length remains to be + // established." + // + // For this reason, the packet length is not checked here for being too long. + + // NTP type embeds type BaseLayer which contains two fields: + // Contents is supposed to contain the bytes of the data at this level. + // Payload is supposed to contain the payload of this level. + // Here we set the baselayer to be the bytes of the NTP record. + d.BaseLayer = BaseLayer{Contents: data[:len(data)]} + + // Extract the fields from the block of bytes. + // To make sense of this, refer to the packet diagram + // above and the section on endian conventions. + + // The first few fields are all packed into the first 32 bits. Unpack them. + f := data[0] + d.LeapIndicator = NTPLeapIndicator((f & 0xC0) >> 6) + d.Version = NTPVersion((f & 0x38) >> 3) + d.Mode = NTPMode(f & 0x07) + d.Stratum = NTPStratum(data[1]) + d.Poll = NTPLog2Seconds(data[2]) + d.Precision = NTPLog2Seconds(data[3]) + + // The remaining fields can just be copied in big endian order. + d.RootDelay = NTPFixed16Seconds(binary.BigEndian.Uint32(data[4:8])) + d.RootDispersion = NTPFixed16Seconds(binary.BigEndian.Uint32(data[8:12])) + d.ReferenceID = NTPReferenceID(binary.BigEndian.Uint32(data[12:16])) + d.ReferenceTimestamp = NTPTimestamp(binary.BigEndian.Uint64(data[16:24])) + d.OriginTimestamp = NTPTimestamp(binary.BigEndian.Uint64(data[24:32])) + d.ReceiveTimestamp = NTPTimestamp(binary.BigEndian.Uint64(data[32:40])) + d.TransmitTimestamp = NTPTimestamp(binary.BigEndian.Uint64(data[40:48])) + + // This layer does not attempt to analyse the extension bytes. + // But if there are any, we'd like the user to know. So we just + // place them all in an ExtensionBytes field. + d.ExtensionBytes = data[48:] + + // Return no error. + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (d *NTP) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + data, err := b.PrependBytes(ntpMinimumRecordSizeInBytes) + if err != nil { + return err + } + + // Pack the first few fields into the first 32 bits. + h := uint8(0) + h |= (uint8(d.LeapIndicator) << 6) & 0xC0 + h |= (uint8(d.Version) << 3) & 0x38 + h |= (uint8(d.Mode)) & 0x07 + data[0] = byte(h) + data[1] = byte(d.Stratum) + data[2] = byte(d.Poll) + data[3] = byte(d.Precision) + + // The remaining fields can just be copied in big endian order. + binary.BigEndian.PutUint32(data[4:8], uint32(d.RootDelay)) + binary.BigEndian.PutUint32(data[8:12], uint32(d.RootDispersion)) + binary.BigEndian.PutUint32(data[12:16], uint32(d.ReferenceID)) + binary.BigEndian.PutUint64(data[16:24], uint64(d.ReferenceTimestamp)) + binary.BigEndian.PutUint64(data[24:32], uint64(d.OriginTimestamp)) + binary.BigEndian.PutUint64(data[32:40], uint64(d.ReceiveTimestamp)) + binary.BigEndian.PutUint64(data[40:48], uint64(d.TransmitTimestamp)) + + ex, err := b.AppendBytes(len(d.ExtensionBytes)) + if err != nil { + return err + } + copy(ex, d.ExtensionBytes) + + return nil +} + +//****************************************************************************** + +// CanDecode returns a set of layers that NTP objects can decode. +// As NTP objects can only decide the NTP layer, we can return just that layer. +// Apparently a single layer type implements LayerClass. +func (d *NTP) CanDecode() gopacket.LayerClass { + return LayerTypeNTP +} + +//****************************************************************************** + +// NextLayerType specifies the next layer that GoPacket should attempt to +// analyse after this (NTP) layer. As NTP packets do not contain any payload +// bytes, there are no further layers to analyse. +func (d *NTP) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypeZero +} + +//****************************************************************************** + +// NTP packets do not carry any data payload, so the empty byte slice is retured. +// In Go, a nil slice is functionally identical to an empty slice, so we +// return nil to avoid a heap allocation. +func (d *NTP) Payload() []byte { + return nil +} + +//****************************************************************************** +//* End Of NTP File * +//****************************************************************************** diff --git a/backend/vendor/github.com/google/gopacket/layers/ospf.go b/backend/vendor/github.com/google/gopacket/layers/ospf.go new file mode 100644 index 0000000..4f5473d --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/ospf.go @@ -0,0 +1,715 @@ +// Copyright 2017 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + + "github.com/google/gopacket" +) + +// OSPFType denotes what kind of OSPF type it is +type OSPFType uint8 + +// Potential values for OSPF.Type. +const ( + OSPFHello OSPFType = 1 + OSPFDatabaseDescription OSPFType = 2 + OSPFLinkStateRequest OSPFType = 3 + OSPFLinkStateUpdate OSPFType = 4 + OSPFLinkStateAcknowledgment OSPFType = 5 +) + +// LSA Function Codes for LSAheader.LSType +const ( + RouterLSAtypeV2 = 0x1 + RouterLSAtype = 0x2001 + NetworkLSAtypeV2 = 0x2 + NetworkLSAtype = 0x2002 + SummaryLSANetworktypeV2 = 0x3 + InterAreaPrefixLSAtype = 0x2003 + SummaryLSAASBRtypeV2 = 0x4 + InterAreaRouterLSAtype = 0x2004 + ASExternalLSAtypeV2 = 0x5 + ASExternalLSAtype = 0x4005 + NSSALSAtype = 0x2007 + NSSALSAtypeV2 = 0x7 + LinkLSAtype = 0x0008 + IntraAreaPrefixLSAtype = 0x2009 +) + +// String conversions for OSPFType +func (i OSPFType) String() string { + switch i { + case OSPFHello: + return "Hello" + case OSPFDatabaseDescription: + return "Database Description" + case OSPFLinkStateRequest: + return "Link State Request" + case OSPFLinkStateUpdate: + return "Link State Update" + case OSPFLinkStateAcknowledgment: + return "Link State Acknowledgment" + default: + return "" + } +} + +// Prefix extends IntraAreaPrefixLSA +type Prefix struct { + PrefixLength uint8 + PrefixOptions uint8 + Metric uint16 + AddressPrefix []byte +} + +// IntraAreaPrefixLSA is the struct from RFC 5340 A.4.10. +type IntraAreaPrefixLSA struct { + NumOfPrefixes uint16 + RefLSType uint16 + RefLinkStateID uint32 + RefAdvRouter uint32 + Prefixes []Prefix +} + +// LinkLSA is the struct from RFC 5340 A.4.9. +type LinkLSA struct { + RtrPriority uint8 + Options uint32 + LinkLocalAddress []byte + NumOfPrefixes uint32 + Prefixes []Prefix +} + +// ASExternalLSAV2 is the struct from RFC 2328 A.4.5. +type ASExternalLSAV2 struct { + NetworkMask uint32 + ExternalBit uint8 + Metric uint32 + ForwardingAddress uint32 + ExternalRouteTag uint32 +} + +// ASExternalLSA is the struct from RFC 5340 A.4.7. +type ASExternalLSA struct { + Flags uint8 + Metric uint32 + PrefixLength uint8 + PrefixOptions uint8 + RefLSType uint16 + AddressPrefix []byte + ForwardingAddress []byte + ExternalRouteTag uint32 + RefLinkStateID uint32 +} + +// InterAreaRouterLSA is the struct from RFC 5340 A.4.6. +type InterAreaRouterLSA struct { + Options uint32 + Metric uint32 + DestinationRouterID uint32 +} + +// InterAreaPrefixLSA is the struct from RFC 5340 A.4.5. +type InterAreaPrefixLSA struct { + Metric uint32 + PrefixLength uint8 + PrefixOptions uint8 + AddressPrefix []byte +} + +// NetworkLSA is the struct from RFC 5340 A.4.4. +type NetworkLSA struct { + Options uint32 + AttachedRouter []uint32 +} + +// NetworkLSAV2 is the struct from RFC 2328 A.4.3. +type NetworkLSAV2 struct { + NetworkMask uint32 + AttachedRouter []uint32 +} + +// RouterV2 extends RouterLSAV2 +type RouterV2 struct { + Type uint8 + LinkID uint32 + LinkData uint32 + Metric uint16 +} + +// RouterLSAV2 is the struct from RFC 2328 A.4.2. +type RouterLSAV2 struct { + Flags uint8 + Links uint16 + Routers []RouterV2 +} + +// Router extends RouterLSA +type Router struct { + Type uint8 + Metric uint16 + InterfaceID uint32 + NeighborInterfaceID uint32 + NeighborRouterID uint32 +} + +// RouterLSA is the struct from RFC 5340 A.4.3. +type RouterLSA struct { + Flags uint8 + Options uint32 + Routers []Router +} + +// LSAheader is the struct from RFC 5340 A.4.2 and RFC 2328 A.4.1. +type LSAheader struct { + LSAge uint16 + LSType uint16 + LinkStateID uint32 + AdvRouter uint32 + LSSeqNumber uint32 + LSChecksum uint16 + Length uint16 + LSOptions uint8 +} + +// LSA links LSAheader with the structs from RFC 5340 A.4. +type LSA struct { + LSAheader + Content interface{} +} + +// LSUpdate is the struct from RFC 5340 A.3.5. +type LSUpdate struct { + NumOfLSAs uint32 + LSAs []LSA +} + +// LSReq is the struct from RFC 5340 A.3.4. +type LSReq struct { + LSType uint16 + LSID uint32 + AdvRouter uint32 +} + +// DbDescPkg is the struct from RFC 5340 A.3.3. +type DbDescPkg struct { + Options uint32 + InterfaceMTU uint16 + Flags uint16 + DDSeqNumber uint32 + LSAinfo []LSAheader +} + +// HelloPkg is the struct from RFC 5340 A.3.2. +type HelloPkg struct { + InterfaceID uint32 + RtrPriority uint8 + Options uint32 + HelloInterval uint16 + RouterDeadInterval uint32 + DesignatedRouterID uint32 + BackupDesignatedRouterID uint32 + NeighborID []uint32 +} + +// HelloPkgV2 extends the HelloPkg struct with OSPFv2 information +type HelloPkgV2 struct { + HelloPkg + NetworkMask uint32 +} + +// OSPF is a basic OSPF packet header with common fields of Version 2 and Version 3. +type OSPF struct { + Version uint8 + Type OSPFType + PacketLength uint16 + RouterID uint32 + AreaID uint32 + Checksum uint16 + Content interface{} +} + +//OSPFv2 extend the OSPF head with version 2 specific fields +type OSPFv2 struct { + BaseLayer + OSPF + AuType uint16 + Authentication uint64 +} + +// OSPFv3 extend the OSPF head with version 3 specific fields +type OSPFv3 struct { + BaseLayer + OSPF + Instance uint8 + Reserved uint8 +} + +// getLSAsv2 parses the LSA information from the packet for OSPFv2 +func getLSAsv2(num uint32, data []byte) ([]LSA, error) { + var lsas []LSA + var i uint32 = 0 + var offset uint32 = 0 + for ; i < num; i++ { + lstype := uint16(data[offset+3]) + lsalength := binary.BigEndian.Uint16(data[offset+18 : offset+20]) + content, err := extractLSAInformation(lstype, lsalength, data[offset:]) + if err != nil { + return nil, fmt.Errorf("Could not extract Link State type.") + } + lsa := LSA{ + LSAheader: LSAheader{ + LSAge: binary.BigEndian.Uint16(data[offset : offset+2]), + LSOptions: data[offset+2], + LSType: lstype, + LinkStateID: binary.BigEndian.Uint32(data[offset+4 : offset+8]), + AdvRouter: binary.BigEndian.Uint32(data[offset+8 : offset+12]), + LSSeqNumber: binary.BigEndian.Uint32(data[offset+12 : offset+16]), + LSChecksum: binary.BigEndian.Uint16(data[offset+16 : offset+18]), + Length: lsalength, + }, + Content: content, + } + lsas = append(lsas, lsa) + offset += uint32(lsalength) + } + return lsas, nil +} + +// extractLSAInformation extracts all the LSA information +func extractLSAInformation(lstype, lsalength uint16, data []byte) (interface{}, error) { + if lsalength < 20 { + return nil, fmt.Errorf("Link State header length %v too short, %v required", lsalength, 20) + } + if len(data) < int(lsalength) { + return nil, fmt.Errorf("Link State header length %v too short, %v required", len(data), lsalength) + } + var content interface{} + switch lstype { + case RouterLSAtypeV2: + var routers []RouterV2 + var j uint32 + for j = 24; j < uint32(lsalength); j += 12 { + if len(data) < int(j+12) { + return nil, errors.New("LSAtypeV2 too small") + } + router := RouterV2{ + LinkID: binary.BigEndian.Uint32(data[j : j+4]), + LinkData: binary.BigEndian.Uint32(data[j+4 : j+8]), + Type: uint8(data[j+8]), + Metric: binary.BigEndian.Uint16(data[j+10 : j+12]), + } + routers = append(routers, router) + } + if len(data) < 24 { + return nil, errors.New("LSAtypeV2 too small") + } + links := binary.BigEndian.Uint16(data[22:24]) + content = RouterLSAV2{ + Flags: data[20], + Links: links, + Routers: routers, + } + case NSSALSAtypeV2: + fallthrough + case ASExternalLSAtypeV2: + content = ASExternalLSAV2{ + NetworkMask: binary.BigEndian.Uint32(data[20:24]), + ExternalBit: data[24] & 0x80, + Metric: binary.BigEndian.Uint32(data[24:28]) & 0x00FFFFFF, + ForwardingAddress: binary.BigEndian.Uint32(data[28:32]), + ExternalRouteTag: binary.BigEndian.Uint32(data[32:36]), + } + case NetworkLSAtypeV2: + var routers []uint32 + var j uint32 + for j = 24; j < uint32(lsalength); j += 4 { + routers = append(routers, binary.BigEndian.Uint32(data[j:j+4])) + } + content = NetworkLSAV2{ + NetworkMask: binary.BigEndian.Uint32(data[20:24]), + AttachedRouter: routers, + } + case RouterLSAtype: + var routers []Router + var j uint32 + for j = 24; j < uint32(lsalength); j += 16 { + router := Router{ + Type: uint8(data[j]), + Metric: binary.BigEndian.Uint16(data[j+2 : j+4]), + InterfaceID: binary.BigEndian.Uint32(data[j+4 : j+8]), + NeighborInterfaceID: binary.BigEndian.Uint32(data[j+8 : j+12]), + NeighborRouterID: binary.BigEndian.Uint32(data[j+12 : j+16]), + } + routers = append(routers, router) + } + content = RouterLSA{ + Flags: uint8(data[20]), + Options: binary.BigEndian.Uint32(data[20:24]) & 0x00FFFFFF, + Routers: routers, + } + case NetworkLSAtype: + var routers []uint32 + var j uint32 + for j = 24; j < uint32(lsalength); j += 4 { + routers = append(routers, binary.BigEndian.Uint32(data[j:j+4])) + } + content = NetworkLSA{ + Options: binary.BigEndian.Uint32(data[20:24]) & 0x00FFFFFF, + AttachedRouter: routers, + } + case InterAreaPrefixLSAtype: + content = InterAreaPrefixLSA{ + Metric: binary.BigEndian.Uint32(data[20:24]) & 0x00FFFFFF, + PrefixLength: uint8(data[24]), + PrefixOptions: uint8(data[25]), + AddressPrefix: data[28:uint32(lsalength)], + } + case InterAreaRouterLSAtype: + content = InterAreaRouterLSA{ + Options: binary.BigEndian.Uint32(data[20:24]) & 0x00FFFFFF, + Metric: binary.BigEndian.Uint32(data[24:28]) & 0x00FFFFFF, + DestinationRouterID: binary.BigEndian.Uint32(data[28:32]), + } + case ASExternalLSAtype: + fallthrough + case NSSALSAtype: + flags := uint8(data[20]) + prefixLen := uint8(data[24]) / 8 + var forwardingAddress []byte + if (flags & 0x02) == 0x02 { + forwardingAddress = data[28+uint32(prefixLen) : 28+uint32(prefixLen)+16] + } + content = ASExternalLSA{ + Flags: flags, + Metric: binary.BigEndian.Uint32(data[20:24]) & 0x00FFFFFF, + PrefixLength: prefixLen, + PrefixOptions: uint8(data[25]), + RefLSType: binary.BigEndian.Uint16(data[26:28]), + AddressPrefix: data[28 : 28+uint32(prefixLen)], + ForwardingAddress: forwardingAddress, + } + case LinkLSAtype: + var prefixes []Prefix + var prefixOffset uint32 = 44 + var j uint32 + numOfPrefixes := binary.BigEndian.Uint32(data[40:44]) + for j = 0; j < numOfPrefixes; j++ { + prefixLen := uint8(data[prefixOffset]) + prefix := Prefix{ + PrefixLength: prefixLen, + PrefixOptions: uint8(data[prefixOffset+1]), + AddressPrefix: data[prefixOffset+4 : prefixOffset+4+uint32(prefixLen)/8], + } + prefixes = append(prefixes, prefix) + prefixOffset = prefixOffset + 4 + uint32(prefixLen)/8 + } + content = LinkLSA{ + RtrPriority: uint8(data[20]), + Options: binary.BigEndian.Uint32(data[20:24]) & 0x00FFFFFF, + LinkLocalAddress: data[24:40], + NumOfPrefixes: numOfPrefixes, + Prefixes: prefixes, + } + case IntraAreaPrefixLSAtype: + var prefixes []Prefix + var prefixOffset uint32 = 32 + var j uint16 + numOfPrefixes := binary.BigEndian.Uint16(data[20:22]) + for j = 0; j < numOfPrefixes; j++ { + prefixLen := uint8(data[prefixOffset]) + prefix := Prefix{ + PrefixLength: prefixLen, + PrefixOptions: uint8(data[prefixOffset+1]), + Metric: binary.BigEndian.Uint16(data[prefixOffset+2 : prefixOffset+4]), + AddressPrefix: data[prefixOffset+4 : prefixOffset+4+uint32(prefixLen)/8], + } + prefixes = append(prefixes, prefix) + prefixOffset = prefixOffset + 4 + uint32(prefixLen) + } + content = IntraAreaPrefixLSA{ + NumOfPrefixes: numOfPrefixes, + RefLSType: binary.BigEndian.Uint16(data[22:24]), + RefLinkStateID: binary.BigEndian.Uint32(data[24:28]), + RefAdvRouter: binary.BigEndian.Uint32(data[28:32]), + Prefixes: prefixes, + } + default: + return nil, fmt.Errorf("Unknown Link State type.") + } + return content, nil +} + +// getLSAs parses the LSA information from the packet for OSPFv3 +func getLSAs(num uint32, data []byte) ([]LSA, error) { + var lsas []LSA + var i uint32 = 0 + var offset uint32 = 0 + for ; i < num; i++ { + var content interface{} + lstype := binary.BigEndian.Uint16(data[offset+2 : offset+4]) + lsalength := binary.BigEndian.Uint16(data[offset+18 : offset+20]) + + content, err := extractLSAInformation(lstype, lsalength, data[offset:]) + if err != nil { + return nil, fmt.Errorf("Could not extract Link State type.") + } + lsa := LSA{ + LSAheader: LSAheader{ + LSAge: binary.BigEndian.Uint16(data[offset : offset+2]), + LSType: lstype, + LinkStateID: binary.BigEndian.Uint32(data[offset+4 : offset+8]), + AdvRouter: binary.BigEndian.Uint32(data[offset+8 : offset+12]), + LSSeqNumber: binary.BigEndian.Uint32(data[offset+12 : offset+16]), + LSChecksum: binary.BigEndian.Uint16(data[offset+16 : offset+18]), + Length: lsalength, + }, + Content: content, + } + lsas = append(lsas, lsa) + offset += uint32(lsalength) + } + return lsas, nil +} + +// DecodeFromBytes decodes the given bytes into the OSPF layer. +func (ospf *OSPFv2) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 24 { + return fmt.Errorf("Packet too smal for OSPF Version 2") + } + + ospf.Version = uint8(data[0]) + ospf.Type = OSPFType(data[1]) + ospf.PacketLength = binary.BigEndian.Uint16(data[2:4]) + ospf.RouterID = binary.BigEndian.Uint32(data[4:8]) + ospf.AreaID = binary.BigEndian.Uint32(data[8:12]) + ospf.Checksum = binary.BigEndian.Uint16(data[12:14]) + ospf.AuType = binary.BigEndian.Uint16(data[14:16]) + ospf.Authentication = binary.BigEndian.Uint64(data[16:24]) + + switch ospf.Type { + case OSPFHello: + var neighbors []uint32 + for i := 44; uint16(i+4) <= ospf.PacketLength; i += 4 { + neighbors = append(neighbors, binary.BigEndian.Uint32(data[i:i+4])) + } + ospf.Content = HelloPkgV2{ + NetworkMask: binary.BigEndian.Uint32(data[24:28]), + HelloPkg: HelloPkg{ + HelloInterval: binary.BigEndian.Uint16(data[28:30]), + Options: uint32(data[30]), + RtrPriority: uint8(data[31]), + RouterDeadInterval: binary.BigEndian.Uint32(data[32:36]), + DesignatedRouterID: binary.BigEndian.Uint32(data[36:40]), + BackupDesignatedRouterID: binary.BigEndian.Uint32(data[40:44]), + NeighborID: neighbors, + }, + } + case OSPFDatabaseDescription: + var lsas []LSAheader + for i := 32; uint16(i+20) <= ospf.PacketLength; i += 20 { + lsa := LSAheader{ + LSAge: binary.BigEndian.Uint16(data[i : i+2]), + LSType: binary.BigEndian.Uint16(data[i+2 : i+4]), + LinkStateID: binary.BigEndian.Uint32(data[i+4 : i+8]), + AdvRouter: binary.BigEndian.Uint32(data[i+8 : i+12]), + LSSeqNumber: binary.BigEndian.Uint32(data[i+12 : i+16]), + LSChecksum: binary.BigEndian.Uint16(data[i+16 : i+18]), + Length: binary.BigEndian.Uint16(data[i+18 : i+20]), + } + lsas = append(lsas, lsa) + } + ospf.Content = DbDescPkg{ + InterfaceMTU: binary.BigEndian.Uint16(data[24:26]), + Options: uint32(data[26]), + Flags: uint16(data[27]), + DDSeqNumber: binary.BigEndian.Uint32(data[28:32]), + LSAinfo: lsas, + } + case OSPFLinkStateRequest: + var lsrs []LSReq + for i := 24; uint16(i+12) <= ospf.PacketLength; i += 12 { + lsr := LSReq{ + LSType: binary.BigEndian.Uint16(data[i+2 : i+4]), + LSID: binary.BigEndian.Uint32(data[i+4 : i+8]), + AdvRouter: binary.BigEndian.Uint32(data[i+8 : i+12]), + } + lsrs = append(lsrs, lsr) + } + ospf.Content = lsrs + case OSPFLinkStateUpdate: + num := binary.BigEndian.Uint32(data[24:28]) + + lsas, err := getLSAsv2(num, data[28:]) + if err != nil { + return fmt.Errorf("Cannot parse Link State Update packet: %v", err) + } + ospf.Content = LSUpdate{ + NumOfLSAs: num, + LSAs: lsas, + } + case OSPFLinkStateAcknowledgment: + var lsas []LSAheader + for i := 24; uint16(i+20) <= ospf.PacketLength; i += 20 { + lsa := LSAheader{ + LSAge: binary.BigEndian.Uint16(data[i : i+2]), + LSOptions: data[i+2], + LSType: uint16(data[i+3]), + LinkStateID: binary.BigEndian.Uint32(data[i+4 : i+8]), + AdvRouter: binary.BigEndian.Uint32(data[i+8 : i+12]), + LSSeqNumber: binary.BigEndian.Uint32(data[i+12 : i+16]), + LSChecksum: binary.BigEndian.Uint16(data[i+16 : i+18]), + Length: binary.BigEndian.Uint16(data[i+18 : i+20]), + } + lsas = append(lsas, lsa) + } + ospf.Content = lsas + } + return nil +} + +// DecodeFromBytes decodes the given bytes into the OSPF layer. +func (ospf *OSPFv3) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + + if len(data) < 16 { + return fmt.Errorf("Packet too smal for OSPF Version 3") + } + + ospf.Version = uint8(data[0]) + ospf.Type = OSPFType(data[1]) + ospf.PacketLength = binary.BigEndian.Uint16(data[2:4]) + ospf.RouterID = binary.BigEndian.Uint32(data[4:8]) + ospf.AreaID = binary.BigEndian.Uint32(data[8:12]) + ospf.Checksum = binary.BigEndian.Uint16(data[12:14]) + ospf.Instance = uint8(data[14]) + ospf.Reserved = uint8(data[15]) + + switch ospf.Type { + case OSPFHello: + var neighbors []uint32 + for i := 36; uint16(i+4) <= ospf.PacketLength; i += 4 { + neighbors = append(neighbors, binary.BigEndian.Uint32(data[i:i+4])) + } + ospf.Content = HelloPkg{ + InterfaceID: binary.BigEndian.Uint32(data[16:20]), + RtrPriority: uint8(data[20]), + Options: binary.BigEndian.Uint32(data[21:25]) >> 8, + HelloInterval: binary.BigEndian.Uint16(data[24:26]), + RouterDeadInterval: uint32(binary.BigEndian.Uint16(data[26:28])), + DesignatedRouterID: binary.BigEndian.Uint32(data[28:32]), + BackupDesignatedRouterID: binary.BigEndian.Uint32(data[32:36]), + NeighborID: neighbors, + } + case OSPFDatabaseDescription: + var lsas []LSAheader + for i := 28; uint16(i+20) <= ospf.PacketLength; i += 20 { + lsa := LSAheader{ + LSAge: binary.BigEndian.Uint16(data[i : i+2]), + LSType: binary.BigEndian.Uint16(data[i+2 : i+4]), + LinkStateID: binary.BigEndian.Uint32(data[i+4 : i+8]), + AdvRouter: binary.BigEndian.Uint32(data[i+8 : i+12]), + LSSeqNumber: binary.BigEndian.Uint32(data[i+12 : i+16]), + LSChecksum: binary.BigEndian.Uint16(data[i+16 : i+18]), + Length: binary.BigEndian.Uint16(data[i+18 : i+20]), + } + lsas = append(lsas, lsa) + } + ospf.Content = DbDescPkg{ + Options: binary.BigEndian.Uint32(data[16:20]) & 0x00FFFFFF, + InterfaceMTU: binary.BigEndian.Uint16(data[20:22]), + Flags: binary.BigEndian.Uint16(data[22:24]), + DDSeqNumber: binary.BigEndian.Uint32(data[24:28]), + LSAinfo: lsas, + } + case OSPFLinkStateRequest: + var lsrs []LSReq + for i := 16; uint16(i+12) <= ospf.PacketLength; i += 12 { + lsr := LSReq{ + LSType: binary.BigEndian.Uint16(data[i+2 : i+4]), + LSID: binary.BigEndian.Uint32(data[i+4 : i+8]), + AdvRouter: binary.BigEndian.Uint32(data[i+8 : i+12]), + } + lsrs = append(lsrs, lsr) + } + ospf.Content = lsrs + case OSPFLinkStateUpdate: + num := binary.BigEndian.Uint32(data[16:20]) + lsas, err := getLSAs(num, data[20:]) + if err != nil { + return fmt.Errorf("Cannot parse Link State Update packet: %v", err) + } + ospf.Content = LSUpdate{ + NumOfLSAs: num, + LSAs: lsas, + } + + case OSPFLinkStateAcknowledgment: + var lsas []LSAheader + for i := 16; uint16(i+20) <= ospf.PacketLength; i += 20 { + lsa := LSAheader{ + LSAge: binary.BigEndian.Uint16(data[i : i+2]), + LSType: binary.BigEndian.Uint16(data[i+2 : i+4]), + LinkStateID: binary.BigEndian.Uint32(data[i+4 : i+8]), + AdvRouter: binary.BigEndian.Uint32(data[i+8 : i+12]), + LSSeqNumber: binary.BigEndian.Uint32(data[i+12 : i+16]), + LSChecksum: binary.BigEndian.Uint16(data[i+16 : i+18]), + Length: binary.BigEndian.Uint16(data[i+18 : i+20]), + } + lsas = append(lsas, lsa) + } + ospf.Content = lsas + default: + } + + return nil +} + +// LayerType returns LayerTypeOSPF +func (ospf *OSPFv2) LayerType() gopacket.LayerType { + return LayerTypeOSPF +} +func (ospf *OSPFv3) LayerType() gopacket.LayerType { + return LayerTypeOSPF +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (ospf *OSPFv2) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypeZero +} +func (ospf *OSPFv3) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypeZero +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (ospf *OSPFv2) CanDecode() gopacket.LayerClass { + return LayerTypeOSPF +} +func (ospf *OSPFv3) CanDecode() gopacket.LayerClass { + return LayerTypeOSPF +} + +func decodeOSPF(data []byte, p gopacket.PacketBuilder) error { + if len(data) < 14 { + return fmt.Errorf("Packet too smal for OSPF") + } + + switch uint8(data[0]) { + case 2: + ospf := &OSPFv2{} + return decodingLayerDecoder(ospf, data, p) + case 3: + ospf := &OSPFv3{} + return decodingLayerDecoder(ospf, data, p) + default: + } + + return fmt.Errorf("Unable to determine OSPF type.") +} diff --git a/backend/vendor/github.com/google/gopacket/layers/pflog.go b/backend/vendor/github.com/google/gopacket/layers/pflog.go new file mode 100644 index 0000000..9dbbd90 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/pflog.go @@ -0,0 +1,84 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + + "github.com/google/gopacket" +) + +type PFDirection uint8 + +const ( + PFDirectionInOut PFDirection = 0 + PFDirectionIn PFDirection = 1 + PFDirectionOut PFDirection = 2 +) + +// PFLog provides the layer for 'pf' packet-filter logging, as described at +// http://www.freebsd.org/cgi/man.cgi?query=pflog&sektion=4 +type PFLog struct { + BaseLayer + Length uint8 + Family ProtocolFamily + Action, Reason uint8 + IFName, Ruleset []byte + RuleNum, SubruleNum uint32 + UID uint32 + PID int32 + RuleUID uint32 + RulePID int32 + Direction PFDirection + // The remainder is padding +} + +func (pf *PFLog) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 60 { + df.SetTruncated() + return errors.New("PFLog data less than 60 bytes") + } + pf.Length = data[0] + pf.Family = ProtocolFamily(data[1]) + pf.Action = data[2] + pf.Reason = data[3] + pf.IFName = data[4:20] + pf.Ruleset = data[20:36] + pf.RuleNum = binary.BigEndian.Uint32(data[36:40]) + pf.SubruleNum = binary.BigEndian.Uint32(data[40:44]) + pf.UID = binary.BigEndian.Uint32(data[44:48]) + pf.PID = int32(binary.BigEndian.Uint32(data[48:52])) + pf.RuleUID = binary.BigEndian.Uint32(data[52:56]) + pf.RulePID = int32(binary.BigEndian.Uint32(data[56:60])) + pf.Direction = PFDirection(data[60]) + if pf.Length%4 != 1 { + return errors.New("PFLog header length should be 3 less than multiple of 4") + } + actualLength := int(pf.Length) + 3 + if len(data) < actualLength { + return fmt.Errorf("PFLog data size < %d", actualLength) + } + pf.Contents = data[:actualLength] + pf.Payload = data[actualLength:] + return nil +} + +// LayerType returns layers.LayerTypePFLog +func (pf *PFLog) LayerType() gopacket.LayerType { return LayerTypePFLog } + +func (pf *PFLog) CanDecode() gopacket.LayerClass { return LayerTypePFLog } + +func (pf *PFLog) NextLayerType() gopacket.LayerType { + return pf.Family.LayerType() +} + +func decodePFLog(data []byte, p gopacket.PacketBuilder) error { + pf := &PFLog{} + return decodingLayerDecoder(pf, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/ports.go b/backend/vendor/github.com/google/gopacket/layers/ports.go new file mode 100644 index 0000000..1e3f42e --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/ports.go @@ -0,0 +1,156 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "fmt" + "strconv" + + "github.com/google/gopacket" +) + +// TCPPort is a port in a TCP layer. +type TCPPort uint16 + +// UDPPort is a port in a UDP layer. +type UDPPort uint16 + +// RUDPPort is a port in a RUDP layer. +type RUDPPort uint8 + +// SCTPPort is a port in a SCTP layer. +type SCTPPort uint16 + +// UDPLitePort is a port in a UDPLite layer. +type UDPLitePort uint16 + +// RUDPPortNames contains the string names for all RUDP ports. +var RUDPPortNames = map[RUDPPort]string{} + +// UDPLitePortNames contains the string names for all UDPLite ports. +var UDPLitePortNames = map[UDPLitePort]string{} + +// {TCP,UDP,SCTP}PortNames can be found in iana_ports.go + +// String returns the port as "number(name)" if there's a well-known port name, +// or just "number" if there isn't. Well-known names are stored in +// TCPPortNames. +func (a TCPPort) String() string { + if name, ok := TCPPortNames[a]; ok { + return fmt.Sprintf("%d(%s)", a, name) + } + return strconv.Itoa(int(a)) +} + +// LayerType returns a LayerType that would be able to decode the +// application payload. It uses some well-known ports such as 53 for +// DNS. +// +// Returns gopacket.LayerTypePayload for unknown/unsupported port numbers. +func (a TCPPort) LayerType() gopacket.LayerType { + lt := tcpPortLayerType[uint16(a)] + if lt != 0 { + return lt + } + return gopacket.LayerTypePayload +} + +var tcpPortLayerType = [65536]gopacket.LayerType{ + 53: LayerTypeDNS, + 443: LayerTypeTLS, // https + 502: LayerTypeModbusTCP, // modbustcp + 636: LayerTypeTLS, // ldaps + 989: LayerTypeTLS, // ftps-data + 990: LayerTypeTLS, // ftps + 992: LayerTypeTLS, // telnets + 993: LayerTypeTLS, // imaps + 994: LayerTypeTLS, // ircs + 995: LayerTypeTLS, // pop3s + 5061: LayerTypeTLS, // ips +} + +// RegisterTCPPortLayerType creates a new mapping between a TCPPort +// and an underlaying LayerType. +func RegisterTCPPortLayerType(port TCPPort, layerType gopacket.LayerType) { + tcpPortLayerType[port] = layerType +} + +// String returns the port as "number(name)" if there's a well-known port name, +// or just "number" if there isn't. Well-known names are stored in +// UDPPortNames. +func (a UDPPort) String() string { + if name, ok := UDPPortNames[a]; ok { + return fmt.Sprintf("%d(%s)", a, name) + } + return strconv.Itoa(int(a)) +} + +// LayerType returns a LayerType that would be able to decode the +// application payload. It uses some well-known ports such as 53 for +// DNS. +// +// Returns gopacket.LayerTypePayload for unknown/unsupported port numbers. +func (a UDPPort) LayerType() gopacket.LayerType { + lt := udpPortLayerType[uint16(a)] + if lt != 0 { + return lt + } + return gopacket.LayerTypePayload +} + +var udpPortLayerType = [65536]gopacket.LayerType{ + 53: LayerTypeDNS, + 123: LayerTypeNTP, + 4789: LayerTypeVXLAN, + 67: LayerTypeDHCPv4, + 68: LayerTypeDHCPv4, + 546: LayerTypeDHCPv6, + 547: LayerTypeDHCPv6, + 5060: LayerTypeSIP, + 6343: LayerTypeSFlow, + 6081: LayerTypeGeneve, + 3784: LayerTypeBFD, + 2152: LayerTypeGTPv1U, + 623: LayerTypeRMCP, + 1812: LayerTypeRADIUS, +} + +// RegisterUDPPortLayerType creates a new mapping between a UDPPort +// and an underlaying LayerType. +func RegisterUDPPortLayerType(port UDPPort, layerType gopacket.LayerType) { + udpPortLayerType[port] = layerType +} + +// String returns the port as "number(name)" if there's a well-known port name, +// or just "number" if there isn't. Well-known names are stored in +// RUDPPortNames. +func (a RUDPPort) String() string { + if name, ok := RUDPPortNames[a]; ok { + return fmt.Sprintf("%d(%s)", a, name) + } + return strconv.Itoa(int(a)) +} + +// String returns the port as "number(name)" if there's a well-known port name, +// or just "number" if there isn't. Well-known names are stored in +// SCTPPortNames. +func (a SCTPPort) String() string { + if name, ok := SCTPPortNames[a]; ok { + return fmt.Sprintf("%d(%s)", a, name) + } + return strconv.Itoa(int(a)) +} + +// String returns the port as "number(name)" if there's a well-known port name, +// or just "number" if there isn't. Well-known names are stored in +// UDPLitePortNames. +func (a UDPLitePort) String() string { + if name, ok := UDPLitePortNames[a]; ok { + return fmt.Sprintf("%d(%s)", a, name) + } + return strconv.Itoa(int(a)) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/ppp.go b/backend/vendor/github.com/google/gopacket/layers/ppp.go new file mode 100644 index 0000000..e534d69 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/ppp.go @@ -0,0 +1,88 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "github.com/google/gopacket" +) + +// PPP is the layer for PPP encapsulation headers. +type PPP struct { + BaseLayer + PPPType PPPType + HasPPTPHeader bool +} + +// PPPEndpoint is a singleton endpoint for PPP. Since there is no actual +// addressing for the two ends of a PPP connection, we use a singleton value +// named 'point' for each endpoint. +var PPPEndpoint = gopacket.NewEndpoint(EndpointPPP, nil) + +// PPPFlow is a singleton flow for PPP. Since there is no actual addressing for +// the two ends of a PPP connection, we use a singleton value to represent the +// flow for all PPP connections. +var PPPFlow = gopacket.NewFlow(EndpointPPP, nil, nil) + +// LayerType returns LayerTypePPP +func (p *PPP) LayerType() gopacket.LayerType { return LayerTypePPP } + +// LinkFlow returns PPPFlow. +func (p *PPP) LinkFlow() gopacket.Flow { return PPPFlow } + +func decodePPP(data []byte, p gopacket.PacketBuilder) error { + ppp := &PPP{} + offset := 0 + if data[0] == 0xff && data[1] == 0x03 { + offset = 2 + ppp.HasPPTPHeader = true + } + if data[offset]&0x1 == 0 { + if data[offset+1]&0x1 == 0 { + return errors.New("PPP has invalid type") + } + ppp.PPPType = PPPType(binary.BigEndian.Uint16(data[offset : offset+2])) + ppp.Contents = data[offset : offset+2] + ppp.Payload = data[offset+2:] + } else { + ppp.PPPType = PPPType(data[offset]) + ppp.Contents = data[offset : offset+1] + ppp.Payload = data[offset+1:] + } + p.AddLayer(ppp) + p.SetLinkLayer(ppp) + return p.NextDecoder(ppp.PPPType) +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (p *PPP) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + if p.PPPType&0x100 == 0 { + bytes, err := b.PrependBytes(2) + if err != nil { + return err + } + binary.BigEndian.PutUint16(bytes, uint16(p.PPPType)) + } else { + bytes, err := b.PrependBytes(1) + if err != nil { + return err + } + bytes[0] = uint8(p.PPPType) + } + if p.HasPPTPHeader { + bytes, err := b.PrependBytes(2) + if err != nil { + return err + } + bytes[0] = 0xff + bytes[1] = 0x03 + } + return nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/pppoe.go b/backend/vendor/github.com/google/gopacket/layers/pppoe.go new file mode 100644 index 0000000..14cd63a --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/pppoe.go @@ -0,0 +1,60 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "github.com/google/gopacket" +) + +// PPPoE is the layer for PPPoE encapsulation headers. +type PPPoE struct { + BaseLayer + Version uint8 + Type uint8 + Code PPPoECode + SessionId uint16 + Length uint16 +} + +// LayerType returns gopacket.LayerTypePPPoE. +func (p *PPPoE) LayerType() gopacket.LayerType { + return LayerTypePPPoE +} + +// decodePPPoE decodes the PPPoE header (see http://tools.ietf.org/html/rfc2516). +func decodePPPoE(data []byte, p gopacket.PacketBuilder) error { + pppoe := &PPPoE{ + Version: data[0] >> 4, + Type: data[0] & 0x0F, + Code: PPPoECode(data[1]), + SessionId: binary.BigEndian.Uint16(data[2:4]), + Length: binary.BigEndian.Uint16(data[4:6]), + } + pppoe.BaseLayer = BaseLayer{data[:6], data[6 : 6+pppoe.Length]} + p.AddLayer(pppoe) + return p.NextDecoder(pppoe.Code) +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (p *PPPoE) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + payload := b.Bytes() + bytes, err := b.PrependBytes(6) + if err != nil { + return err + } + bytes[0] = (p.Version << 4) | p.Type + bytes[1] = byte(p.Code) + binary.BigEndian.PutUint16(bytes[2:], p.SessionId) + if opts.FixLengths { + p.Length = uint16(len(payload)) + } + binary.BigEndian.PutUint16(bytes[4:], p.Length) + return nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/prism.go b/backend/vendor/github.com/google/gopacket/layers/prism.go new file mode 100644 index 0000000..e1711e7 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/prism.go @@ -0,0 +1,146 @@ +// Copyright 2015 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +// http://www.tcpdump.org/linktypes/LINKTYPE_IEEE802_11_PRISM.html + +package layers + +import ( + "encoding/binary" + "errors" + + "github.com/google/gopacket" +) + +func decodePrismValue(data []byte, pv *PrismValue) { + pv.DID = PrismDID(binary.LittleEndian.Uint32(data[0:4])) + pv.Status = binary.LittleEndian.Uint16(data[4:6]) + pv.Length = binary.LittleEndian.Uint16(data[6:8]) + pv.Data = data[8 : 8+pv.Length] +} + +type PrismDID uint32 + +const ( + PrismDIDType1HostTime PrismDID = 0x10044 + PrismDIDType2HostTime PrismDID = 0x01041 + PrismDIDType1MACTime PrismDID = 0x20044 + PrismDIDType2MACTime PrismDID = 0x02041 + PrismDIDType1Channel PrismDID = 0x30044 + PrismDIDType2Channel PrismDID = 0x03041 + PrismDIDType1RSSI PrismDID = 0x40044 + PrismDIDType2RSSI PrismDID = 0x04041 + PrismDIDType1SignalQuality PrismDID = 0x50044 + PrismDIDType2SignalQuality PrismDID = 0x05041 + PrismDIDType1Signal PrismDID = 0x60044 + PrismDIDType2Signal PrismDID = 0x06041 + PrismDIDType1Noise PrismDID = 0x70044 + PrismDIDType2Noise PrismDID = 0x07041 + PrismDIDType1Rate PrismDID = 0x80044 + PrismDIDType2Rate PrismDID = 0x08041 + PrismDIDType1TransmittedFrameIndicator PrismDID = 0x90044 + PrismDIDType2TransmittedFrameIndicator PrismDID = 0x09041 + PrismDIDType1FrameLength PrismDID = 0xA0044 + PrismDIDType2FrameLength PrismDID = 0x0A041 +) + +const ( + PrismType1MessageCode uint16 = 0x00000044 + PrismType2MessageCode uint16 = 0x00000041 +) + +func (p PrismDID) String() string { + dids := map[PrismDID]string{ + PrismDIDType1HostTime: "Host Time", + PrismDIDType2HostTime: "Host Time", + PrismDIDType1MACTime: "MAC Time", + PrismDIDType2MACTime: "MAC Time", + PrismDIDType1Channel: "Channel", + PrismDIDType2Channel: "Channel", + PrismDIDType1RSSI: "RSSI", + PrismDIDType2RSSI: "RSSI", + PrismDIDType1SignalQuality: "Signal Quality", + PrismDIDType2SignalQuality: "Signal Quality", + PrismDIDType1Signal: "Signal", + PrismDIDType2Signal: "Signal", + PrismDIDType1Noise: "Noise", + PrismDIDType2Noise: "Noise", + PrismDIDType1Rate: "Rate", + PrismDIDType2Rate: "Rate", + PrismDIDType1TransmittedFrameIndicator: "Transmitted Frame Indicator", + PrismDIDType2TransmittedFrameIndicator: "Transmitted Frame Indicator", + PrismDIDType1FrameLength: "Frame Length", + PrismDIDType2FrameLength: "Frame Length", + } + + if str, ok := dids[p]; ok { + return str + } + + return "Unknown DID" +} + +type PrismValue struct { + DID PrismDID + Status uint16 + Length uint16 + Data []byte +} + +func (pv *PrismValue) IsSupplied() bool { + return pv.Status == 1 +} + +var ErrPrismExpectedMoreData = errors.New("Expected more data.") +var ErrPrismInvalidCode = errors.New("Invalid header code.") + +func decodePrismHeader(data []byte, p gopacket.PacketBuilder) error { + d := &PrismHeader{} + return decodingLayerDecoder(d, data, p) +} + +type PrismHeader struct { + BaseLayer + Code uint16 + Length uint16 + DeviceName string + Values []PrismValue +} + +func (m *PrismHeader) LayerType() gopacket.LayerType { return LayerTypePrismHeader } + +func (m *PrismHeader) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + m.Code = binary.LittleEndian.Uint16(data[0:4]) + m.Length = binary.LittleEndian.Uint16(data[4:8]) + m.DeviceName = string(data[8:24]) + m.BaseLayer = BaseLayer{Contents: data[:m.Length], Payload: data[m.Length:len(data)]} + + switch m.Code { + case PrismType1MessageCode: + fallthrough + case PrismType2MessageCode: + // valid message code + default: + return ErrPrismInvalidCode + } + + offset := uint16(24) + + m.Values = make([]PrismValue, (m.Length-offset)/12) + for i := 0; i < len(m.Values); i++ { + decodePrismValue(data[offset:offset+12], &m.Values[i]) + offset += 12 + } + + if offset != m.Length { + return ErrPrismExpectedMoreData + } + + return nil +} + +func (m *PrismHeader) CanDecode() gopacket.LayerClass { return LayerTypePrismHeader } +func (m *PrismHeader) NextLayerType() gopacket.LayerType { return LayerTypeDot11 } diff --git a/backend/vendor/github.com/google/gopacket/layers/radiotap.go b/backend/vendor/github.com/google/gopacket/layers/radiotap.go new file mode 100644 index 0000000..d09559f --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/radiotap.go @@ -0,0 +1,1076 @@ +// Copyright 2014 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "bytes" + "encoding/binary" + "errors" + "fmt" + "hash/crc32" + "strings" + + "github.com/google/gopacket" +) + +// align calculates the number of bytes needed to align with the width +// on the offset, returning the number of bytes we need to skip to +// align to the offset (width). +func align(offset uint16, width uint16) uint16 { + return ((((offset) + ((width) - 1)) & (^((width) - 1))) - offset) +} + +type RadioTapPresent uint32 + +const ( + RadioTapPresentTSFT RadioTapPresent = 1 << iota + RadioTapPresentFlags + RadioTapPresentRate + RadioTapPresentChannel + RadioTapPresentFHSS + RadioTapPresentDBMAntennaSignal + RadioTapPresentDBMAntennaNoise + RadioTapPresentLockQuality + RadioTapPresentTxAttenuation + RadioTapPresentDBTxAttenuation + RadioTapPresentDBMTxPower + RadioTapPresentAntenna + RadioTapPresentDBAntennaSignal + RadioTapPresentDBAntennaNoise + RadioTapPresentRxFlags + RadioTapPresentTxFlags + RadioTapPresentRtsRetries + RadioTapPresentDataRetries + _ + RadioTapPresentMCS + RadioTapPresentAMPDUStatus + RadioTapPresentVHT + RadioTapPresentEXT RadioTapPresent = 1 << 31 +) + +func (r RadioTapPresent) TSFT() bool { + return r&RadioTapPresentTSFT != 0 +} +func (r RadioTapPresent) Flags() bool { + return r&RadioTapPresentFlags != 0 +} +func (r RadioTapPresent) Rate() bool { + return r&RadioTapPresentRate != 0 +} +func (r RadioTapPresent) Channel() bool { + return r&RadioTapPresentChannel != 0 +} +func (r RadioTapPresent) FHSS() bool { + return r&RadioTapPresentFHSS != 0 +} +func (r RadioTapPresent) DBMAntennaSignal() bool { + return r&RadioTapPresentDBMAntennaSignal != 0 +} +func (r RadioTapPresent) DBMAntennaNoise() bool { + return r&RadioTapPresentDBMAntennaNoise != 0 +} +func (r RadioTapPresent) LockQuality() bool { + return r&RadioTapPresentLockQuality != 0 +} +func (r RadioTapPresent) TxAttenuation() bool { + return r&RadioTapPresentTxAttenuation != 0 +} +func (r RadioTapPresent) DBTxAttenuation() bool { + return r&RadioTapPresentDBTxAttenuation != 0 +} +func (r RadioTapPresent) DBMTxPower() bool { + return r&RadioTapPresentDBMTxPower != 0 +} +func (r RadioTapPresent) Antenna() bool { + return r&RadioTapPresentAntenna != 0 +} +func (r RadioTapPresent) DBAntennaSignal() bool { + return r&RadioTapPresentDBAntennaSignal != 0 +} +func (r RadioTapPresent) DBAntennaNoise() bool { + return r&RadioTapPresentDBAntennaNoise != 0 +} +func (r RadioTapPresent) RxFlags() bool { + return r&RadioTapPresentRxFlags != 0 +} +func (r RadioTapPresent) TxFlags() bool { + return r&RadioTapPresentTxFlags != 0 +} +func (r RadioTapPresent) RtsRetries() bool { + return r&RadioTapPresentRtsRetries != 0 +} +func (r RadioTapPresent) DataRetries() bool { + return r&RadioTapPresentDataRetries != 0 +} +func (r RadioTapPresent) MCS() bool { + return r&RadioTapPresentMCS != 0 +} +func (r RadioTapPresent) AMPDUStatus() bool { + return r&RadioTapPresentAMPDUStatus != 0 +} +func (r RadioTapPresent) VHT() bool { + return r&RadioTapPresentVHT != 0 +} +func (r RadioTapPresent) EXT() bool { + return r&RadioTapPresentEXT != 0 +} + +type RadioTapChannelFlags uint16 + +const ( + RadioTapChannelFlagsTurbo RadioTapChannelFlags = 0x0010 // Turbo channel + RadioTapChannelFlagsCCK RadioTapChannelFlags = 0x0020 // CCK channel + RadioTapChannelFlagsOFDM RadioTapChannelFlags = 0x0040 // OFDM channel + RadioTapChannelFlagsGhz2 RadioTapChannelFlags = 0x0080 // 2 GHz spectrum channel. + RadioTapChannelFlagsGhz5 RadioTapChannelFlags = 0x0100 // 5 GHz spectrum channel + RadioTapChannelFlagsPassive RadioTapChannelFlags = 0x0200 // Only passive scan allowed + RadioTapChannelFlagsDynamic RadioTapChannelFlags = 0x0400 // Dynamic CCK-OFDM channel + RadioTapChannelFlagsGFSK RadioTapChannelFlags = 0x0800 // GFSK channel (FHSS PHY) +) + +func (r RadioTapChannelFlags) Turbo() bool { + return r&RadioTapChannelFlagsTurbo != 0 +} +func (r RadioTapChannelFlags) CCK() bool { + return r&RadioTapChannelFlagsCCK != 0 +} +func (r RadioTapChannelFlags) OFDM() bool { + return r&RadioTapChannelFlagsOFDM != 0 +} +func (r RadioTapChannelFlags) Ghz2() bool { + return r&RadioTapChannelFlagsGhz2 != 0 +} +func (r RadioTapChannelFlags) Ghz5() bool { + return r&RadioTapChannelFlagsGhz5 != 0 +} +func (r RadioTapChannelFlags) Passive() bool { + return r&RadioTapChannelFlagsPassive != 0 +} +func (r RadioTapChannelFlags) Dynamic() bool { + return r&RadioTapChannelFlagsDynamic != 0 +} +func (r RadioTapChannelFlags) GFSK() bool { + return r&RadioTapChannelFlagsGFSK != 0 +} + +// String provides a human readable string for RadioTapChannelFlags. +// This string is possibly subject to change over time; if you're storing this +// persistently, you should probably store the RadioTapChannelFlags value, not its string. +func (a RadioTapChannelFlags) String() string { + var out bytes.Buffer + if a.Turbo() { + out.WriteString("Turbo,") + } + if a.CCK() { + out.WriteString("CCK,") + } + if a.OFDM() { + out.WriteString("OFDM,") + } + if a.Ghz2() { + out.WriteString("Ghz2,") + } + if a.Ghz5() { + out.WriteString("Ghz5,") + } + if a.Passive() { + out.WriteString("Passive,") + } + if a.Dynamic() { + out.WriteString("Dynamic,") + } + if a.GFSK() { + out.WriteString("GFSK,") + } + + if length := out.Len(); length > 0 { + return string(out.Bytes()[:length-1]) // strip final comma + } + return "" +} + +type RadioTapFlags uint8 + +const ( + RadioTapFlagsCFP RadioTapFlags = 1 << iota // sent/received during CFP + RadioTapFlagsShortPreamble // sent/received * with short * preamble + RadioTapFlagsWEP // sent/received * with WEP encryption + RadioTapFlagsFrag // sent/received * with fragmentation + RadioTapFlagsFCS // frame includes FCS + RadioTapFlagsDatapad // frame has padding between * 802.11 header and payload * (to 32-bit boundary) + RadioTapFlagsBadFCS // does not pass FCS check + RadioTapFlagsShortGI // HT short GI +) + +func (r RadioTapFlags) CFP() bool { + return r&RadioTapFlagsCFP != 0 +} +func (r RadioTapFlags) ShortPreamble() bool { + return r&RadioTapFlagsShortPreamble != 0 +} +func (r RadioTapFlags) WEP() bool { + return r&RadioTapFlagsWEP != 0 +} +func (r RadioTapFlags) Frag() bool { + return r&RadioTapFlagsFrag != 0 +} +func (r RadioTapFlags) FCS() bool { + return r&RadioTapFlagsFCS != 0 +} +func (r RadioTapFlags) Datapad() bool { + return r&RadioTapFlagsDatapad != 0 +} +func (r RadioTapFlags) BadFCS() bool { + return r&RadioTapFlagsBadFCS != 0 +} +func (r RadioTapFlags) ShortGI() bool { + return r&RadioTapFlagsShortGI != 0 +} + +// String provides a human readable string for RadioTapFlags. +// This string is possibly subject to change over time; if you're storing this +// persistently, you should probably store the RadioTapFlags value, not its string. +func (a RadioTapFlags) String() string { + var out bytes.Buffer + if a.CFP() { + out.WriteString("CFP,") + } + if a.ShortPreamble() { + out.WriteString("SHORT-PREAMBLE,") + } + if a.WEP() { + out.WriteString("WEP,") + } + if a.Frag() { + out.WriteString("FRAG,") + } + if a.FCS() { + out.WriteString("FCS,") + } + if a.Datapad() { + out.WriteString("DATAPAD,") + } + if a.ShortGI() { + out.WriteString("SHORT-GI,") + } + + if length := out.Len(); length > 0 { + return string(out.Bytes()[:length-1]) // strip final comma + } + return "" +} + +type RadioTapRate uint8 + +func (a RadioTapRate) String() string { + return fmt.Sprintf("%v Mb/s", 0.5*float32(a)) +} + +type RadioTapChannelFrequency uint16 + +func (a RadioTapChannelFrequency) String() string { + return fmt.Sprintf("%d MHz", a) +} + +type RadioTapRxFlags uint16 + +const ( + RadioTapRxFlagsBadPlcp RadioTapRxFlags = 0x0002 +) + +func (self RadioTapRxFlags) BadPlcp() bool { + return self&RadioTapRxFlagsBadPlcp != 0 +} + +func (self RadioTapRxFlags) String() string { + if self.BadPlcp() { + return "BADPLCP" + } + return "" +} + +type RadioTapTxFlags uint16 + +const ( + RadioTapTxFlagsFail RadioTapTxFlags = 1 << iota + RadioTapTxFlagsCTS + RadioTapTxFlagsRTS + RadioTapTxFlagsNoACK +) + +func (self RadioTapTxFlags) Fail() bool { return self&RadioTapTxFlagsFail != 0 } +func (self RadioTapTxFlags) CTS() bool { return self&RadioTapTxFlagsCTS != 0 } +func (self RadioTapTxFlags) RTS() bool { return self&RadioTapTxFlagsRTS != 0 } +func (self RadioTapTxFlags) NoACK() bool { return self&RadioTapTxFlagsNoACK != 0 } + +func (self RadioTapTxFlags) String() string { + var tokens []string + if self.Fail() { + tokens = append(tokens, "Fail") + } + if self.CTS() { + tokens = append(tokens, "CTS") + } + if self.RTS() { + tokens = append(tokens, "RTS") + } + if self.NoACK() { + tokens = append(tokens, "NoACK") + } + return strings.Join(tokens, ",") +} + +type RadioTapMCS struct { + Known RadioTapMCSKnown + Flags RadioTapMCSFlags + MCS uint8 +} + +func (self RadioTapMCS) String() string { + var tokens []string + if self.Known.Bandwidth() { + token := "?" + switch self.Flags.Bandwidth() { + case 0: + token = "20" + case 1: + token = "40" + case 2: + token = "40(20L)" + case 3: + token = "40(20U)" + } + tokens = append(tokens, token) + } + if self.Known.MCSIndex() { + tokens = append(tokens, fmt.Sprintf("MCSIndex#%d", self.MCS)) + } + if self.Known.GuardInterval() { + if self.Flags.ShortGI() { + tokens = append(tokens, fmt.Sprintf("shortGI")) + } else { + tokens = append(tokens, fmt.Sprintf("longGI")) + } + } + if self.Known.HTFormat() { + if self.Flags.Greenfield() { + tokens = append(tokens, fmt.Sprintf("HT-greenfield")) + } else { + tokens = append(tokens, fmt.Sprintf("HT-mixed")) + } + } + if self.Known.FECType() { + if self.Flags.FECLDPC() { + tokens = append(tokens, fmt.Sprintf("LDPC")) + } else { + tokens = append(tokens, fmt.Sprintf("BCC")) + } + } + if self.Known.STBC() { + tokens = append(tokens, fmt.Sprintf("STBC#%d", self.Flags.STBC())) + } + if self.Known.NESS() { + num := 0 + if self.Known.NESS1() { + num |= 0x02 + } + if self.Flags.NESS0() { + num |= 0x01 + } + tokens = append(tokens, fmt.Sprintf("num-of-ESS#%d", num)) + } + return strings.Join(tokens, ",") +} + +type RadioTapMCSKnown uint8 + +const ( + RadioTapMCSKnownBandwidth RadioTapMCSKnown = 1 << iota + RadioTapMCSKnownMCSIndex + RadioTapMCSKnownGuardInterval + RadioTapMCSKnownHTFormat + RadioTapMCSKnownFECType + RadioTapMCSKnownSTBC + RadioTapMCSKnownNESS + RadioTapMCSKnownNESS1 +) + +func (self RadioTapMCSKnown) Bandwidth() bool { return self&RadioTapMCSKnownBandwidth != 0 } +func (self RadioTapMCSKnown) MCSIndex() bool { return self&RadioTapMCSKnownMCSIndex != 0 } +func (self RadioTapMCSKnown) GuardInterval() bool { return self&RadioTapMCSKnownGuardInterval != 0 } +func (self RadioTapMCSKnown) HTFormat() bool { return self&RadioTapMCSKnownHTFormat != 0 } +func (self RadioTapMCSKnown) FECType() bool { return self&RadioTapMCSKnownFECType != 0 } +func (self RadioTapMCSKnown) STBC() bool { return self&RadioTapMCSKnownSTBC != 0 } +func (self RadioTapMCSKnown) NESS() bool { return self&RadioTapMCSKnownNESS != 0 } +func (self RadioTapMCSKnown) NESS1() bool { return self&RadioTapMCSKnownNESS1 != 0 } + +type RadioTapMCSFlags uint8 + +const ( + RadioTapMCSFlagsBandwidthMask RadioTapMCSFlags = 0x03 + RadioTapMCSFlagsShortGI = 0x04 + RadioTapMCSFlagsGreenfield = 0x08 + RadioTapMCSFlagsFECLDPC = 0x10 + RadioTapMCSFlagsSTBCMask = 0x60 + RadioTapMCSFlagsNESS0 = 0x80 +) + +func (self RadioTapMCSFlags) Bandwidth() int { + return int(self & RadioTapMCSFlagsBandwidthMask) +} +func (self RadioTapMCSFlags) ShortGI() bool { return self&RadioTapMCSFlagsShortGI != 0 } +func (self RadioTapMCSFlags) Greenfield() bool { return self&RadioTapMCSFlagsGreenfield != 0 } +func (self RadioTapMCSFlags) FECLDPC() bool { return self&RadioTapMCSFlagsFECLDPC != 0 } +func (self RadioTapMCSFlags) STBC() int { + return int(self&RadioTapMCSFlagsSTBCMask) >> 5 +} +func (self RadioTapMCSFlags) NESS0() bool { return self&RadioTapMCSFlagsNESS0 != 0 } + +type RadioTapAMPDUStatus struct { + Reference uint32 + Flags RadioTapAMPDUStatusFlags + CRC uint8 +} + +func (self RadioTapAMPDUStatus) String() string { + tokens := []string{ + fmt.Sprintf("ref#%x", self.Reference), + } + if self.Flags.ReportZerolen() && self.Flags.IsZerolen() { + tokens = append(tokens, fmt.Sprintf("zero-length")) + } + if self.Flags.LastKnown() && self.Flags.IsLast() { + tokens = append(tokens, "last") + } + if self.Flags.DelimCRCErr() { + tokens = append(tokens, "delimiter CRC error") + } + if self.Flags.DelimCRCKnown() { + tokens = append(tokens, fmt.Sprintf("delimiter-CRC=%02x", self.CRC)) + } + return strings.Join(tokens, ",") +} + +type RadioTapAMPDUStatusFlags uint16 + +const ( + RadioTapAMPDUStatusFlagsReportZerolen RadioTapAMPDUStatusFlags = 1 << iota + RadioTapAMPDUIsZerolen + RadioTapAMPDULastKnown + RadioTapAMPDUIsLast + RadioTapAMPDUDelimCRCErr + RadioTapAMPDUDelimCRCKnown +) + +func (self RadioTapAMPDUStatusFlags) ReportZerolen() bool { + return self&RadioTapAMPDUStatusFlagsReportZerolen != 0 +} +func (self RadioTapAMPDUStatusFlags) IsZerolen() bool { return self&RadioTapAMPDUIsZerolen != 0 } +func (self RadioTapAMPDUStatusFlags) LastKnown() bool { return self&RadioTapAMPDULastKnown != 0 } +func (self RadioTapAMPDUStatusFlags) IsLast() bool { return self&RadioTapAMPDUIsLast != 0 } +func (self RadioTapAMPDUStatusFlags) DelimCRCErr() bool { return self&RadioTapAMPDUDelimCRCErr != 0 } +func (self RadioTapAMPDUStatusFlags) DelimCRCKnown() bool { + return self&RadioTapAMPDUDelimCRCKnown != 0 +} + +type RadioTapVHT struct { + Known RadioTapVHTKnown + Flags RadioTapVHTFlags + Bandwidth uint8 + MCSNSS [4]RadioTapVHTMCSNSS + Coding uint8 + GroupId uint8 + PartialAID uint16 +} + +func (self RadioTapVHT) String() string { + var tokens []string + if self.Known.STBC() { + if self.Flags.STBC() { + tokens = append(tokens, "STBC") + } else { + tokens = append(tokens, "no STBC") + } + } + if self.Known.TXOPPSNotAllowed() { + if self.Flags.TXOPPSNotAllowed() { + tokens = append(tokens, "TXOP doze not allowed") + } else { + tokens = append(tokens, "TXOP doze allowed") + } + } + if self.Known.GI() { + if self.Flags.SGI() { + tokens = append(tokens, "short GI") + } else { + tokens = append(tokens, "long GI") + } + } + if self.Known.SGINSYMDisambiguation() { + if self.Flags.SGINSYMMod() { + tokens = append(tokens, "NSYM mod 10=9") + } else { + tokens = append(tokens, "NSYM mod 10!=9 or no short GI") + } + } + if self.Known.LDPCExtraOFDMSymbol() { + if self.Flags.LDPCExtraOFDMSymbol() { + tokens = append(tokens, "LDPC extra OFDM symbols") + } else { + tokens = append(tokens, "no LDPC extra OFDM symbols") + } + } + if self.Known.Beamformed() { + if self.Flags.Beamformed() { + tokens = append(tokens, "beamformed") + } else { + tokens = append(tokens, "no beamformed") + } + } + if self.Known.Bandwidth() { + token := "?" + switch self.Bandwidth & 0x1f { + case 0: + token = "20" + case 1: + token = "40" + case 2: + token = "40(20L)" + case 3: + token = "40(20U)" + case 4: + token = "80" + case 5: + token = "80(40L)" + case 6: + token = "80(40U)" + case 7: + token = "80(20LL)" + case 8: + token = "80(20LU)" + case 9: + token = "80(20UL)" + case 10: + token = "80(20UU)" + case 11: + token = "160" + case 12: + token = "160(80L)" + case 13: + token = "160(80U)" + case 14: + token = "160(40LL)" + case 15: + token = "160(40LU)" + case 16: + token = "160(40UL)" + case 17: + token = "160(40UU)" + case 18: + token = "160(20LLL)" + case 19: + token = "160(20LLU)" + case 20: + token = "160(20LUL)" + case 21: + token = "160(20LUU)" + case 22: + token = "160(20ULL)" + case 23: + token = "160(20ULU)" + case 24: + token = "160(20UUL)" + case 25: + token = "160(20UUU)" + } + tokens = append(tokens, token) + } + for i, MCSNSS := range self.MCSNSS { + if MCSNSS.Present() { + fec := "?" + switch self.Coding & (1 << uint8(i)) { + case 0: + fec = "BCC" + case 1: + fec = "LDPC" + } + tokens = append(tokens, fmt.Sprintf("user%d(%s,%s)", i, MCSNSS.String(), fec)) + } + } + if self.Known.GroupId() { + tokens = append(tokens, + fmt.Sprintf("group=%d", self.GroupId)) + } + if self.Known.PartialAID() { + tokens = append(tokens, + fmt.Sprintf("partial-AID=%d", self.PartialAID)) + } + return strings.Join(tokens, ",") +} + +type RadioTapVHTKnown uint16 + +const ( + RadioTapVHTKnownSTBC RadioTapVHTKnown = 1 << iota + RadioTapVHTKnownTXOPPSNotAllowed + RadioTapVHTKnownGI + RadioTapVHTKnownSGINSYMDisambiguation + RadioTapVHTKnownLDPCExtraOFDMSymbol + RadioTapVHTKnownBeamformed + RadioTapVHTKnownBandwidth + RadioTapVHTKnownGroupId + RadioTapVHTKnownPartialAID +) + +func (self RadioTapVHTKnown) STBC() bool { return self&RadioTapVHTKnownSTBC != 0 } +func (self RadioTapVHTKnown) TXOPPSNotAllowed() bool { + return self&RadioTapVHTKnownTXOPPSNotAllowed != 0 +} +func (self RadioTapVHTKnown) GI() bool { return self&RadioTapVHTKnownGI != 0 } +func (self RadioTapVHTKnown) SGINSYMDisambiguation() bool { + return self&RadioTapVHTKnownSGINSYMDisambiguation != 0 +} +func (self RadioTapVHTKnown) LDPCExtraOFDMSymbol() bool { + return self&RadioTapVHTKnownLDPCExtraOFDMSymbol != 0 +} +func (self RadioTapVHTKnown) Beamformed() bool { return self&RadioTapVHTKnownBeamformed != 0 } +func (self RadioTapVHTKnown) Bandwidth() bool { return self&RadioTapVHTKnownBandwidth != 0 } +func (self RadioTapVHTKnown) GroupId() bool { return self&RadioTapVHTKnownGroupId != 0 } +func (self RadioTapVHTKnown) PartialAID() bool { return self&RadioTapVHTKnownPartialAID != 0 } + +type RadioTapVHTFlags uint8 + +const ( + RadioTapVHTFlagsSTBC RadioTapVHTFlags = 1 << iota + RadioTapVHTFlagsTXOPPSNotAllowed + RadioTapVHTFlagsSGI + RadioTapVHTFlagsSGINSYMMod + RadioTapVHTFlagsLDPCExtraOFDMSymbol + RadioTapVHTFlagsBeamformed +) + +func (self RadioTapVHTFlags) STBC() bool { return self&RadioTapVHTFlagsSTBC != 0 } +func (self RadioTapVHTFlags) TXOPPSNotAllowed() bool { + return self&RadioTapVHTFlagsTXOPPSNotAllowed != 0 +} +func (self RadioTapVHTFlags) SGI() bool { return self&RadioTapVHTFlagsSGI != 0 } +func (self RadioTapVHTFlags) SGINSYMMod() bool { return self&RadioTapVHTFlagsSGINSYMMod != 0 } +func (self RadioTapVHTFlags) LDPCExtraOFDMSymbol() bool { + return self&RadioTapVHTFlagsLDPCExtraOFDMSymbol != 0 +} +func (self RadioTapVHTFlags) Beamformed() bool { return self&RadioTapVHTFlagsBeamformed != 0 } + +type RadioTapVHTMCSNSS uint8 + +func (self RadioTapVHTMCSNSS) Present() bool { + return self&0x0F != 0 +} + +func (self RadioTapVHTMCSNSS) String() string { + return fmt.Sprintf("NSS#%dMCS#%d", uint32(self&0xf), uint32(self>>4)) +} + +func decodeRadioTap(data []byte, p gopacket.PacketBuilder) error { + d := &RadioTap{} + // TODO: Should we set LinkLayer here? And implement LinkFlow + return decodingLayerDecoder(d, data, p) +} + +type RadioTap struct { + BaseLayer + + // Version 0. Only increases for drastic changes, introduction of compatible new fields does not count. + Version uint8 + // Length of the whole header in bytes, including it_version, it_pad, it_len, and data fields. + Length uint16 + // Present is a bitmap telling which fields are present. Set bit 31 (0x80000000) to extend the bitmap by another 32 bits. Additional extensions are made by setting bit 31. + Present RadioTapPresent + // TSFT: value in microseconds of the MAC's 64-bit 802.11 Time Synchronization Function timer when the first bit of the MPDU arrived at the MAC. For received frames, only. + TSFT uint64 + Flags RadioTapFlags + // Rate Tx/Rx data rate + Rate RadioTapRate + // ChannelFrequency Tx/Rx frequency in MHz, followed by flags + ChannelFrequency RadioTapChannelFrequency + ChannelFlags RadioTapChannelFlags + // FHSS For frequency-hopping radios, the hop set (first byte) and pattern (second byte). + FHSS uint16 + // DBMAntennaSignal RF signal power at the antenna, decibel difference from one milliwatt. + DBMAntennaSignal int8 + // DBMAntennaNoise RF noise power at the antenna, decibel difference from one milliwatt. + DBMAntennaNoise int8 + // LockQuality Quality of Barker code lock. Unitless. Monotonically nondecreasing with "better" lock strength. Called "Signal Quality" in datasheets. + LockQuality uint16 + // TxAttenuation Transmit power expressed as unitless distance from max power set at factory calibration. 0 is max power. Monotonically nondecreasing with lower power levels. + TxAttenuation uint16 + // DBTxAttenuation Transmit power expressed as decibel distance from max power set at factory calibration. 0 is max power. Monotonically nondecreasing with lower power levels. + DBTxAttenuation uint16 + // DBMTxPower Transmit power expressed as dBm (decibels from a 1 milliwatt reference). This is the absolute power level measured at the antenna port. + DBMTxPower int8 + // Antenna Unitless indication of the Rx/Tx antenna for this packet. The first antenna is antenna 0. + Antenna uint8 + // DBAntennaSignal RF signal power at the antenna, decibel difference from an arbitrary, fixed reference. + DBAntennaSignal uint8 + // DBAntennaNoise RF noise power at the antenna, decibel difference from an arbitrary, fixed reference point. + DBAntennaNoise uint8 + // + RxFlags RadioTapRxFlags + TxFlags RadioTapTxFlags + RtsRetries uint8 + DataRetries uint8 + MCS RadioTapMCS + AMPDUStatus RadioTapAMPDUStatus + VHT RadioTapVHT +} + +func (m *RadioTap) LayerType() gopacket.LayerType { return LayerTypeRadioTap } + +func (m *RadioTap) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 8 { + df.SetTruncated() + return errors.New("RadioTap too small") + } + m.Version = uint8(data[0]) + m.Length = binary.LittleEndian.Uint16(data[2:4]) + m.Present = RadioTapPresent(binary.LittleEndian.Uint32(data[4:8])) + + offset := uint16(4) + + for (binary.LittleEndian.Uint32(data[offset:offset+4]) & 0x80000000) != 0 { + // This parser only handles standard radiotap namespace, + // and expects all fields are packed in the first it_present. + // Extended bitmap will be just ignored. + offset += 4 + } + offset += 4 // skip the bitmap + + if m.Present.TSFT() { + offset += align(offset, 8) + m.TSFT = binary.LittleEndian.Uint64(data[offset : offset+8]) + offset += 8 + } + if m.Present.Flags() { + m.Flags = RadioTapFlags(data[offset]) + offset++ + } + if m.Present.Rate() { + m.Rate = RadioTapRate(data[offset]) + offset++ + } + if m.Present.Channel() { + offset += align(offset, 2) + m.ChannelFrequency = RadioTapChannelFrequency(binary.LittleEndian.Uint16(data[offset : offset+2])) + offset += 2 + m.ChannelFlags = RadioTapChannelFlags(binary.LittleEndian.Uint16(data[offset : offset+2])) + offset += 2 + } + if m.Present.FHSS() { + m.FHSS = binary.LittleEndian.Uint16(data[offset : offset+2]) + offset += 2 + } + if m.Present.DBMAntennaSignal() { + m.DBMAntennaSignal = int8(data[offset]) + offset++ + } + if m.Present.DBMAntennaNoise() { + m.DBMAntennaNoise = int8(data[offset]) + offset++ + } + if m.Present.LockQuality() { + offset += align(offset, 2) + m.LockQuality = binary.LittleEndian.Uint16(data[offset : offset+2]) + offset += 2 + } + if m.Present.TxAttenuation() { + offset += align(offset, 2) + m.TxAttenuation = binary.LittleEndian.Uint16(data[offset : offset+2]) + offset += 2 + } + if m.Present.DBTxAttenuation() { + offset += align(offset, 2) + m.DBTxAttenuation = binary.LittleEndian.Uint16(data[offset : offset+2]) + offset += 2 + } + if m.Present.DBMTxPower() { + m.DBMTxPower = int8(data[offset]) + offset++ + } + if m.Present.Antenna() { + m.Antenna = uint8(data[offset]) + offset++ + } + if m.Present.DBAntennaSignal() { + m.DBAntennaSignal = uint8(data[offset]) + offset++ + } + if m.Present.DBAntennaNoise() { + m.DBAntennaNoise = uint8(data[offset]) + offset++ + } + if m.Present.RxFlags() { + offset += align(offset, 2) + m.RxFlags = RadioTapRxFlags(binary.LittleEndian.Uint16(data[offset:])) + offset += 2 + } + if m.Present.TxFlags() { + offset += align(offset, 2) + m.TxFlags = RadioTapTxFlags(binary.LittleEndian.Uint16(data[offset:])) + offset += 2 + } + if m.Present.RtsRetries() { + m.RtsRetries = uint8(data[offset]) + offset++ + } + if m.Present.DataRetries() { + m.DataRetries = uint8(data[offset]) + offset++ + } + if m.Present.MCS() { + m.MCS = RadioTapMCS{ + RadioTapMCSKnown(data[offset]), + RadioTapMCSFlags(data[offset+1]), + uint8(data[offset+2]), + } + offset += 3 + } + if m.Present.AMPDUStatus() { + offset += align(offset, 4) + m.AMPDUStatus = RadioTapAMPDUStatus{ + Reference: binary.LittleEndian.Uint32(data[offset:]), + Flags: RadioTapAMPDUStatusFlags(binary.LittleEndian.Uint16(data[offset+4:])), + CRC: uint8(data[offset+6]), + } + offset += 8 + } + if m.Present.VHT() { + offset += align(offset, 2) + m.VHT = RadioTapVHT{ + Known: RadioTapVHTKnown(binary.LittleEndian.Uint16(data[offset:])), + Flags: RadioTapVHTFlags(data[offset+2]), + Bandwidth: uint8(data[offset+3]), + MCSNSS: [4]RadioTapVHTMCSNSS{ + RadioTapVHTMCSNSS(data[offset+4]), + RadioTapVHTMCSNSS(data[offset+5]), + RadioTapVHTMCSNSS(data[offset+6]), + RadioTapVHTMCSNSS(data[offset+7]), + }, + Coding: uint8(data[offset+8]), + GroupId: uint8(data[offset+9]), + PartialAID: binary.LittleEndian.Uint16(data[offset+10:]), + } + offset += 12 + } + + payload := data[m.Length:] + + // Remove non standard padding used by some Wi-Fi drivers + if m.Flags.Datapad() && + payload[0]&0xC == 0x8 { //&& // Data frame + headlen := 24 + if payload[0]&0x8C == 0x88 { // QoS + headlen += 2 + } + if payload[1]&0x3 == 0x3 { // 4 addresses + headlen += 2 + } + if headlen%4 == 2 { + payload = append(payload[:headlen], payload[headlen+2:len(payload)]...) + } + } + + if !m.Flags.FCS() { + // Dot11.DecodeFromBytes() expects FCS present and performs a hard chop on the checksum + // If a user is handing in subslices or packets from a buffered stream, the capacity of the slice + // may extend beyond the len, rather than expecting callers to enforce cap==len on every packet + // we take the hit in this one case and do a reallocation. If the user DOES enforce cap==len + // then the reallocation will happen anyway on the append. This is requried because the append + // write to the memory directly after the payload if there is sufficient capacity, which callers + // may not expect. + reallocPayload := make([]byte, len(payload)+4) + copy(reallocPayload[0:len(payload)], payload) + h := crc32.NewIEEE() + h.Write(payload) + binary.LittleEndian.PutUint32(reallocPayload[len(payload):], h.Sum32()) + payload = reallocPayload + } + m.BaseLayer = BaseLayer{Contents: data[:m.Length], Payload: payload} + + return nil +} + +func (m RadioTap) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + buf := make([]byte, 1024) + + buf[0] = m.Version + buf[1] = 0 + + binary.LittleEndian.PutUint32(buf[4:8], uint32(m.Present)) + + offset := uint16(4) + + for (binary.LittleEndian.Uint32(buf[offset:offset+4]) & 0x80000000) != 0 { + offset += 4 + } + + offset += 4 + + if m.Present.TSFT() { + offset += align(offset, 8) + binary.LittleEndian.PutUint64(buf[offset:offset+8], m.TSFT) + offset += 8 + } + + if m.Present.Flags() { + buf[offset] = uint8(m.Flags) + offset++ + } + + if m.Present.Rate() { + buf[offset] = uint8(m.Rate) + offset++ + } + + if m.Present.Channel() { + offset += align(offset, 2) + binary.LittleEndian.PutUint16(buf[offset:offset+2], uint16(m.ChannelFrequency)) + offset += 2 + binary.LittleEndian.PutUint16(buf[offset:offset+2], uint16(m.ChannelFlags)) + offset += 2 + } + + if m.Present.FHSS() { + binary.LittleEndian.PutUint16(buf[offset:offset+2], m.FHSS) + offset += 2 + } + + if m.Present.DBMAntennaSignal() { + buf[offset] = byte(m.DBMAntennaSignal) + offset++ + } + + if m.Present.DBMAntennaNoise() { + buf[offset] = byte(m.DBMAntennaNoise) + offset++ + } + + if m.Present.LockQuality() { + offset += align(offset, 2) + binary.LittleEndian.PutUint16(buf[offset:offset+2], m.LockQuality) + offset += 2 + } + + if m.Present.TxAttenuation() { + offset += align(offset, 2) + binary.LittleEndian.PutUint16(buf[offset:offset+2], m.TxAttenuation) + offset += 2 + } + + if m.Present.DBTxAttenuation() { + offset += align(offset, 2) + binary.LittleEndian.PutUint16(buf[offset:offset+2], m.DBTxAttenuation) + offset += 2 + } + + if m.Present.DBMTxPower() { + buf[offset] = byte(m.DBMTxPower) + offset++ + } + + if m.Present.Antenna() { + buf[offset] = uint8(m.Antenna) + offset++ + } + + if m.Present.DBAntennaSignal() { + buf[offset] = uint8(m.DBAntennaSignal) + offset++ + } + + if m.Present.DBAntennaNoise() { + buf[offset] = uint8(m.DBAntennaNoise) + offset++ + } + + if m.Present.RxFlags() { + offset += align(offset, 2) + binary.LittleEndian.PutUint16(buf[offset:offset+2], uint16(m.RxFlags)) + offset += 2 + } + + if m.Present.TxFlags() { + offset += align(offset, 2) + binary.LittleEndian.PutUint16(buf[offset:offset+2], uint16(m.TxFlags)) + offset += 2 + } + + if m.Present.RtsRetries() { + buf[offset] = m.RtsRetries + offset++ + } + + if m.Present.DataRetries() { + buf[offset] = m.DataRetries + offset++ + } + + if m.Present.MCS() { + buf[offset] = uint8(m.MCS.Known) + buf[offset+1] = uint8(m.MCS.Flags) + buf[offset+2] = uint8(m.MCS.MCS) + + offset += 3 + } + + if m.Present.AMPDUStatus() { + offset += align(offset, 4) + + binary.LittleEndian.PutUint32(buf[offset:offset+4], m.AMPDUStatus.Reference) + binary.LittleEndian.PutUint16(buf[offset+4:offset+6], uint16(m.AMPDUStatus.Flags)) + + buf[offset+6] = m.AMPDUStatus.CRC + + offset += 8 + } + + if m.Present.VHT() { + offset += align(offset, 2) + + binary.LittleEndian.PutUint16(buf[offset:], uint16(m.VHT.Known)) + + buf[offset+2] = uint8(m.VHT.Flags) + buf[offset+3] = uint8(m.VHT.Bandwidth) + buf[offset+4] = uint8(m.VHT.MCSNSS[0]) + buf[offset+5] = uint8(m.VHT.MCSNSS[1]) + buf[offset+6] = uint8(m.VHT.MCSNSS[2]) + buf[offset+7] = uint8(m.VHT.MCSNSS[3]) + buf[offset+8] = uint8(m.VHT.Coding) + buf[offset+9] = uint8(m.VHT.GroupId) + + binary.LittleEndian.PutUint16(buf[offset+10:offset+12], m.VHT.PartialAID) + + offset += 12 + } + + packetBuf, err := b.PrependBytes(int(offset)) + + if err != nil { + return err + } + + if opts.FixLengths { + m.Length = offset + } + + binary.LittleEndian.PutUint16(buf[2:4], m.Length) + + copy(packetBuf, buf) + + return nil +} + +func (m *RadioTap) CanDecode() gopacket.LayerClass { return LayerTypeRadioTap } +func (m *RadioTap) NextLayerType() gopacket.LayerType { return LayerTypeDot11 } diff --git a/backend/vendor/github.com/google/gopacket/layers/radius.go b/backend/vendor/github.com/google/gopacket/layers/radius.go new file mode 100644 index 0000000..c43ea29 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/radius.go @@ -0,0 +1,560 @@ +// Copyright 2020 The GoPacket Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style license that can be found +// in the LICENSE file in the root of the source tree. + +package layers + +import ( + "encoding/binary" + "fmt" + + "github.com/google/gopacket" +) + +const ( + // RFC 2865 3. Packet Format + // `The minimum length is 20 and maximum length is 4096.` + radiusMinimumRecordSizeInBytes int = 20 + radiusMaximumRecordSizeInBytes int = 4096 + + // RFC 2865 5. Attributes + // `The Length field is one octet, and indicates the length of this Attribute including the Type, Length and Value fields.` + // `The Value field is zero or more octets and contains information specific to the Attribute.` + radiusAttributesMinimumRecordSizeInBytes int = 2 +) + +// RADIUS represents a Remote Authentication Dial In User Service layer. +type RADIUS struct { + BaseLayer + + Code RADIUSCode + Identifier RADIUSIdentifier + Length RADIUSLength + Authenticator RADIUSAuthenticator + Attributes []RADIUSAttribute +} + +// RADIUSCode represents packet type. +type RADIUSCode uint8 + +// constants that define RADIUSCode. +const ( + RADIUSCodeAccessRequest RADIUSCode = 1 // RFC2865 3. Packet Format + RADIUSCodeAccessAccept RADIUSCode = 2 // RFC2865 3. Packet Format + RADIUSCodeAccessReject RADIUSCode = 3 // RFC2865 3. Packet Format + RADIUSCodeAccountingRequest RADIUSCode = 4 // RFC2865 3. Packet Format + RADIUSCodeAccountingResponse RADIUSCode = 5 // RFC2865 3. Packet Format + RADIUSCodeAccessChallenge RADIUSCode = 11 // RFC2865 3. Packet Format + RADIUSCodeStatusServer RADIUSCode = 12 // RFC2865 3. Packet Format (experimental) + RADIUSCodeStatusClient RADIUSCode = 13 // RFC2865 3. Packet Format (experimental) + RADIUSCodeReserved RADIUSCode = 255 // RFC2865 3. Packet Format +) + +// String returns a string version of a RADIUSCode. +func (t RADIUSCode) String() (s string) { + switch t { + case RADIUSCodeAccessRequest: + s = "Access-Request" + case RADIUSCodeAccessAccept: + s = "Access-Accept" + case RADIUSCodeAccessReject: + s = "Access-Reject" + case RADIUSCodeAccountingRequest: + s = "Accounting-Request" + case RADIUSCodeAccountingResponse: + s = "Accounting-Response" + case RADIUSCodeAccessChallenge: + s = "Access-Challenge" + case RADIUSCodeStatusServer: + s = "Status-Server" + case RADIUSCodeStatusClient: + s = "Status-Client" + case RADIUSCodeReserved: + s = "Reserved" + default: + s = fmt.Sprintf("Unknown(%d)", t) + } + return +} + +// RADIUSIdentifier represents packet identifier. +type RADIUSIdentifier uint8 + +// RADIUSLength represents packet length. +type RADIUSLength uint16 + +// RADIUSAuthenticator represents authenticator. +type RADIUSAuthenticator [16]byte + +// RADIUSAttribute represents attributes. +type RADIUSAttribute struct { + Type RADIUSAttributeType + Length RADIUSAttributeLength + Value RADIUSAttributeValue +} + +// RADIUSAttributeType represents attribute type. +type RADIUSAttributeType uint8 + +// constants that define RADIUSAttributeType. +const ( + RADIUSAttributeTypeUserName RADIUSAttributeType = 1 // RFC2865 5.1. User-Name + RADIUSAttributeTypeUserPassword RADIUSAttributeType = 2 // RFC2865 5.2. User-Password + RADIUSAttributeTypeCHAPPassword RADIUSAttributeType = 3 // RFC2865 5.3. CHAP-Password + RADIUSAttributeTypeNASIPAddress RADIUSAttributeType = 4 // RFC2865 5.4. NAS-IP-Address + RADIUSAttributeTypeNASPort RADIUSAttributeType = 5 // RFC2865 5.5. NAS-Port + RADIUSAttributeTypeServiceType RADIUSAttributeType = 6 // RFC2865 5.6. Service-Type + RADIUSAttributeTypeFramedProtocol RADIUSAttributeType = 7 // RFC2865 5.7. Framed-Protocol + RADIUSAttributeTypeFramedIPAddress RADIUSAttributeType = 8 // RFC2865 5.8. Framed-IP-Address + RADIUSAttributeTypeFramedIPNetmask RADIUSAttributeType = 9 // RFC2865 5.9. Framed-IP-Netmask + RADIUSAttributeTypeFramedRouting RADIUSAttributeType = 10 // RFC2865 5.10. Framed-Routing + RADIUSAttributeTypeFilterId RADIUSAttributeType = 11 // RFC2865 5.11. Filter-Id + RADIUSAttributeTypeFramedMTU RADIUSAttributeType = 12 // RFC2865 5.12. Framed-MTU + RADIUSAttributeTypeFramedCompression RADIUSAttributeType = 13 // RFC2865 5.13. Framed-Compression + RADIUSAttributeTypeLoginIPHost RADIUSAttributeType = 14 // RFC2865 5.14. Login-IP-Host + RADIUSAttributeTypeLoginService RADIUSAttributeType = 15 // RFC2865 5.15. Login-Service + RADIUSAttributeTypeLoginTCPPort RADIUSAttributeType = 16 // RFC2865 5.16. Login-TCP-Port + RADIUSAttributeTypeReplyMessage RADIUSAttributeType = 18 // RFC2865 5.18. Reply-Message + RADIUSAttributeTypeCallbackNumber RADIUSAttributeType = 19 // RFC2865 5.19. Callback-Number + RADIUSAttributeTypeCallbackId RADIUSAttributeType = 20 // RFC2865 5.20. Callback-Id + RADIUSAttributeTypeFramedRoute RADIUSAttributeType = 22 // RFC2865 5.22. Framed-Route + RADIUSAttributeTypeFramedIPXNetwork RADIUSAttributeType = 23 // RFC2865 5.23. Framed-IPX-Network + RADIUSAttributeTypeState RADIUSAttributeType = 24 // RFC2865 5.24. State + RADIUSAttributeTypeClass RADIUSAttributeType = 25 // RFC2865 5.25. Class + RADIUSAttributeTypeVendorSpecific RADIUSAttributeType = 26 // RFC2865 5.26. Vendor-Specific + RADIUSAttributeTypeSessionTimeout RADIUSAttributeType = 27 // RFC2865 5.27. Session-Timeout + RADIUSAttributeTypeIdleTimeout RADIUSAttributeType = 28 // RFC2865 5.28. Idle-Timeout + RADIUSAttributeTypeTerminationAction RADIUSAttributeType = 29 // RFC2865 5.29. Termination-Action + RADIUSAttributeTypeCalledStationId RADIUSAttributeType = 30 // RFC2865 5.30. Called-Station-Id + RADIUSAttributeTypeCallingStationId RADIUSAttributeType = 31 // RFC2865 5.31. Calling-Station-Id + RADIUSAttributeTypeNASIdentifier RADIUSAttributeType = 32 // RFC2865 5.32. NAS-Identifier + RADIUSAttributeTypeProxyState RADIUSAttributeType = 33 // RFC2865 5.33. Proxy-State + RADIUSAttributeTypeLoginLATService RADIUSAttributeType = 34 // RFC2865 5.34. Login-LAT-Service + RADIUSAttributeTypeLoginLATNode RADIUSAttributeType = 35 // RFC2865 5.35. Login-LAT-Node + RADIUSAttributeTypeLoginLATGroup RADIUSAttributeType = 36 // RFC2865 5.36. Login-LAT-Group + RADIUSAttributeTypeFramedAppleTalkLink RADIUSAttributeType = 37 // RFC2865 5.37. Framed-AppleTalk-Link + RADIUSAttributeTypeFramedAppleTalkNetwork RADIUSAttributeType = 38 // RFC2865 5.38. Framed-AppleTalk-Network + RADIUSAttributeTypeFramedAppleTalkZone RADIUSAttributeType = 39 // RFC2865 5.39. Framed-AppleTalk-Zone + RADIUSAttributeTypeAcctStatusType RADIUSAttributeType = 40 // RFC2866 5.1. Acct-Status-Type + RADIUSAttributeTypeAcctDelayTime RADIUSAttributeType = 41 // RFC2866 5.2. Acct-Delay-Time + RADIUSAttributeTypeAcctInputOctets RADIUSAttributeType = 42 // RFC2866 5.3. Acct-Input-Octets + RADIUSAttributeTypeAcctOutputOctets RADIUSAttributeType = 43 // RFC2866 5.4. Acct-Output-Octets + RADIUSAttributeTypeAcctSessionId RADIUSAttributeType = 44 // RFC2866 5.5. Acct-Session-Id + RADIUSAttributeTypeAcctAuthentic RADIUSAttributeType = 45 // RFC2866 5.6. Acct-Authentic + RADIUSAttributeTypeAcctSessionTime RADIUSAttributeType = 46 // RFC2866 5.7. Acct-Session-Time + RADIUSAttributeTypeAcctInputPackets RADIUSAttributeType = 47 // RFC2866 5.8. Acct-Input-Packets + RADIUSAttributeTypeAcctOutputPackets RADIUSAttributeType = 48 // RFC2866 5.9. Acct-Output-Packets + RADIUSAttributeTypeAcctTerminateCause RADIUSAttributeType = 49 // RFC2866 5.10. Acct-Terminate-Cause + RADIUSAttributeTypeAcctMultiSessionId RADIUSAttributeType = 50 // RFC2866 5.11. Acct-Multi-Session-Id + RADIUSAttributeTypeAcctLinkCount RADIUSAttributeType = 51 // RFC2866 5.12. Acct-Link-Count + RADIUSAttributeTypeAcctInputGigawords RADIUSAttributeType = 52 // RFC2869 5.1. Acct-Input-Gigawords + RADIUSAttributeTypeAcctOutputGigawords RADIUSAttributeType = 53 // RFC2869 5.2. Acct-Output-Gigawords + RADIUSAttributeTypeEventTimestamp RADIUSAttributeType = 55 // RFC2869 5.3. Event-Timestamp + RADIUSAttributeTypeCHAPChallenge RADIUSAttributeType = 60 // RFC2865 5.40. CHAP-Challenge + RADIUSAttributeTypeNASPortType RADIUSAttributeType = 61 // RFC2865 5.41. NAS-Port-Type + RADIUSAttributeTypePortLimit RADIUSAttributeType = 62 // RFC2865 5.42. Port-Limit + RADIUSAttributeTypeLoginLATPort RADIUSAttributeType = 63 // RFC2865 5.43. Login-LAT-Port + RADIUSAttributeTypeTunnelType RADIUSAttributeType = 64 // RFC2868 3.1. Tunnel-Type + RADIUSAttributeTypeTunnelMediumType RADIUSAttributeType = 65 // RFC2868 3.2. Tunnel-Medium-Type + RADIUSAttributeTypeTunnelClientEndpoint RADIUSAttributeType = 66 // RFC2868 3.3. Tunnel-Client-Endpoint + RADIUSAttributeTypeTunnelServerEndpoint RADIUSAttributeType = 67 // RFC2868 3.4. Tunnel-Server-Endpoint + RADIUSAttributeTypeAcctTunnelConnection RADIUSAttributeType = 68 // RFC2867 4.1. Acct-Tunnel-Connection + RADIUSAttributeTypeTunnelPassword RADIUSAttributeType = 69 // RFC2868 3.5. Tunnel-Password + RADIUSAttributeTypeARAPPassword RADIUSAttributeType = 70 // RFC2869 5.4. ARAP-Password + RADIUSAttributeTypeARAPFeatures RADIUSAttributeType = 71 // RFC2869 5.5. ARAP-Features + RADIUSAttributeTypeARAPZoneAccess RADIUSAttributeType = 72 // RFC2869 5.6. ARAP-Zone-Access + RADIUSAttributeTypeARAPSecurity RADIUSAttributeType = 73 // RFC2869 5.7. ARAP-Security + RADIUSAttributeTypeARAPSecurityData RADIUSAttributeType = 74 // RFC2869 5.8. ARAP-Security-Data + RADIUSAttributeTypePasswordRetry RADIUSAttributeType = 75 // RFC2869 5.9. Password-Retry + RADIUSAttributeTypePrompt RADIUSAttributeType = 76 // RFC2869 5.10. Prompt + RADIUSAttributeTypeConnectInfo RADIUSAttributeType = 77 // RFC2869 5.11. Connect-Info + RADIUSAttributeTypeConfigurationToken RADIUSAttributeType = 78 // RFC2869 5.12. Configuration-Token + RADIUSAttributeTypeEAPMessage RADIUSAttributeType = 79 // RFC2869 5.13. EAP-Message + RADIUSAttributeTypeMessageAuthenticator RADIUSAttributeType = 80 // RFC2869 5.14. Message-Authenticator + RADIUSAttributeTypeTunnelPrivateGroupID RADIUSAttributeType = 81 // RFC2868 3.6. Tunnel-Private-Group-ID + RADIUSAttributeTypeTunnelAssignmentID RADIUSAttributeType = 82 // RFC2868 3.7. Tunnel-Assignment-ID + RADIUSAttributeTypeTunnelPreference RADIUSAttributeType = 83 // RFC2868 3.8. Tunnel-Preference + RADIUSAttributeTypeARAPChallengeResponse RADIUSAttributeType = 84 // RFC2869 5.15. ARAP-Challenge-Response + RADIUSAttributeTypeAcctInterimInterval RADIUSAttributeType = 85 // RFC2869 5.16. Acct-Interim-Interval + RADIUSAttributeTypeAcctTunnelPacketsLost RADIUSAttributeType = 86 // RFC2867 4.2. Acct-Tunnel-Packets-Lost + RADIUSAttributeTypeNASPortId RADIUSAttributeType = 87 // RFC2869 5.17. NAS-Port-Id + RADIUSAttributeTypeFramedPool RADIUSAttributeType = 88 // RFC2869 5.18. Framed-Pool + RADIUSAttributeTypeTunnelClientAuthID RADIUSAttributeType = 90 // RFC2868 3.9. Tunnel-Client-Auth-ID + RADIUSAttributeTypeTunnelServerAuthID RADIUSAttributeType = 91 // RFC2868 3.10. Tunnel-Server-Auth-ID +) + +// RADIUSAttributeType represents attribute length. +type RADIUSAttributeLength uint8 + +// RADIUSAttributeType represents attribute value. +type RADIUSAttributeValue []byte + +// String returns a string version of a RADIUSAttributeType. +func (t RADIUSAttributeType) String() (s string) { + switch t { + case RADIUSAttributeTypeUserName: + s = "User-Name" + case RADIUSAttributeTypeUserPassword: + s = "User-Password" + case RADIUSAttributeTypeCHAPPassword: + s = "CHAP-Password" + case RADIUSAttributeTypeNASIPAddress: + s = "NAS-IP-Address" + case RADIUSAttributeTypeNASPort: + s = "NAS-Port" + case RADIUSAttributeTypeServiceType: + s = "Service-Type" + case RADIUSAttributeTypeFramedProtocol: + s = "Framed-Protocol" + case RADIUSAttributeTypeFramedIPAddress: + s = "Framed-IP-Address" + case RADIUSAttributeTypeFramedIPNetmask: + s = "Framed-IP-Netmask" + case RADIUSAttributeTypeFramedRouting: + s = "Framed-Routing" + case RADIUSAttributeTypeFilterId: + s = "Filter-Id" + case RADIUSAttributeTypeFramedMTU: + s = "Framed-MTU" + case RADIUSAttributeTypeFramedCompression: + s = "Framed-Compression" + case RADIUSAttributeTypeLoginIPHost: + s = "Login-IP-Host" + case RADIUSAttributeTypeLoginService: + s = "Login-Service" + case RADIUSAttributeTypeLoginTCPPort: + s = "Login-TCP-Port" + case RADIUSAttributeTypeReplyMessage: + s = "Reply-Message" + case RADIUSAttributeTypeCallbackNumber: + s = "Callback-Number" + case RADIUSAttributeTypeCallbackId: + s = "Callback-Id" + case RADIUSAttributeTypeFramedRoute: + s = "Framed-Route" + case RADIUSAttributeTypeFramedIPXNetwork: + s = "Framed-IPX-Network" + case RADIUSAttributeTypeState: + s = "State" + case RADIUSAttributeTypeClass: + s = "Class" + case RADIUSAttributeTypeVendorSpecific: + s = "Vendor-Specific" + case RADIUSAttributeTypeSessionTimeout: + s = "Session-Timeout" + case RADIUSAttributeTypeIdleTimeout: + s = "Idle-Timeout" + case RADIUSAttributeTypeTerminationAction: + s = "Termination-Action" + case RADIUSAttributeTypeCalledStationId: + s = "Called-Station-Id" + case RADIUSAttributeTypeCallingStationId: + s = "Calling-Station-Id" + case RADIUSAttributeTypeNASIdentifier: + s = "NAS-Identifier" + case RADIUSAttributeTypeProxyState: + s = "Proxy-State" + case RADIUSAttributeTypeLoginLATService: + s = "Login-LAT-Service" + case RADIUSAttributeTypeLoginLATNode: + s = "Login-LAT-Node" + case RADIUSAttributeTypeLoginLATGroup: + s = "Login-LAT-Group" + case RADIUSAttributeTypeFramedAppleTalkLink: + s = "Framed-AppleTalk-Link" + case RADIUSAttributeTypeFramedAppleTalkNetwork: + s = "Framed-AppleTalk-Network" + case RADIUSAttributeTypeFramedAppleTalkZone: + s = "Framed-AppleTalk-Zone" + case RADIUSAttributeTypeAcctStatusType: + s = "Acct-Status-Type" + case RADIUSAttributeTypeAcctDelayTime: + s = "Acct-Delay-Time" + case RADIUSAttributeTypeAcctInputOctets: + s = "Acct-Input-Octets" + case RADIUSAttributeTypeAcctOutputOctets: + s = "Acct-Output-Octets" + case RADIUSAttributeTypeAcctSessionId: + s = "Acct-Session-Id" + case RADIUSAttributeTypeAcctAuthentic: + s = "Acct-Authentic" + case RADIUSAttributeTypeAcctSessionTime: + s = "Acct-Session-Time" + case RADIUSAttributeTypeAcctInputPackets: + s = "Acct-Input-Packets" + case RADIUSAttributeTypeAcctOutputPackets: + s = "Acct-Output-Packets" + case RADIUSAttributeTypeAcctTerminateCause: + s = "Acct-Terminate-Cause" + case RADIUSAttributeTypeAcctMultiSessionId: + s = "Acct-Multi-Session-Id" + case RADIUSAttributeTypeAcctLinkCount: + s = "Acct-Link-Count" + case RADIUSAttributeTypeAcctInputGigawords: + s = "Acct-Input-Gigawords" + case RADIUSAttributeTypeAcctOutputGigawords: + s = "Acct-Output-Gigawords" + case RADIUSAttributeTypeEventTimestamp: + s = "Event-Timestamp" + case RADIUSAttributeTypeCHAPChallenge: + s = "CHAP-Challenge" + case RADIUSAttributeTypeNASPortType: + s = "NAS-Port-Type" + case RADIUSAttributeTypePortLimit: + s = "Port-Limit" + case RADIUSAttributeTypeLoginLATPort: + s = "Login-LAT-Port" + case RADIUSAttributeTypeTunnelType: + s = "Tunnel-Type" + case RADIUSAttributeTypeTunnelMediumType: + s = "Tunnel-Medium-Type" + case RADIUSAttributeTypeTunnelClientEndpoint: + s = "Tunnel-Client-Endpoint" + case RADIUSAttributeTypeTunnelServerEndpoint: + s = "Tunnel-Server-Endpoint" + case RADIUSAttributeTypeAcctTunnelConnection: + s = "Acct-Tunnel-Connection" + case RADIUSAttributeTypeTunnelPassword: + s = "Tunnel-Password" + case RADIUSAttributeTypeARAPPassword: + s = "ARAP-Password" + case RADIUSAttributeTypeARAPFeatures: + s = "ARAP-Features" + case RADIUSAttributeTypeARAPZoneAccess: + s = "ARAP-Zone-Access" + case RADIUSAttributeTypeARAPSecurity: + s = "ARAP-Security" + case RADIUSAttributeTypeARAPSecurityData: + s = "ARAP-Security-Data" + case RADIUSAttributeTypePasswordRetry: + s = "Password-Retry" + case RADIUSAttributeTypePrompt: + s = "Prompt" + case RADIUSAttributeTypeConnectInfo: + s = "Connect-Info" + case RADIUSAttributeTypeConfigurationToken: + s = "Configuration-Token" + case RADIUSAttributeTypeEAPMessage: + s = "EAP-Message" + case RADIUSAttributeTypeMessageAuthenticator: + s = "Message-Authenticator" + case RADIUSAttributeTypeTunnelPrivateGroupID: + s = "Tunnel-Private-Group-ID" + case RADIUSAttributeTypeTunnelAssignmentID: + s = "Tunnel-Assignment-ID" + case RADIUSAttributeTypeTunnelPreference: + s = "Tunnel-Preference" + case RADIUSAttributeTypeARAPChallengeResponse: + s = "ARAP-Challenge-Response" + case RADIUSAttributeTypeAcctInterimInterval: + s = "Acct-Interim-Interval" + case RADIUSAttributeTypeAcctTunnelPacketsLost: + s = "Acct-Tunnel-Packets-Lost" + case RADIUSAttributeTypeNASPortId: + s = "NAS-Port-Id" + case RADIUSAttributeTypeFramedPool: + s = "Framed-Pool" + case RADIUSAttributeTypeTunnelClientAuthID: + s = "Tunnel-Client-Auth-ID" + case RADIUSAttributeTypeTunnelServerAuthID: + s = "Tunnel-Server-Auth-ID" + default: + s = fmt.Sprintf("Unknown(%d)", t) + } + return +} + +// Len returns the length of a RADIUS packet. +func (radius *RADIUS) Len() (int, error) { + n := radiusMinimumRecordSizeInBytes + for _, v := range radius.Attributes { + alen, err := attributeValueLength(v.Value) + if err != nil { + return 0, err + } + n += int(alen) + 2 // Added Type and Length + } + return n, nil +} + +// LayerType returns LayerTypeRADIUS. +func (radius *RADIUS) LayerType() gopacket.LayerType { + return LayerTypeRADIUS +} + +// DecodeFromBytes decodes the given bytes into this layer. +func (radius *RADIUS) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) > radiusMaximumRecordSizeInBytes { + df.SetTruncated() + return fmt.Errorf("RADIUS length %d too big", len(data)) + } + + if len(data) < radiusMinimumRecordSizeInBytes { + df.SetTruncated() + return fmt.Errorf("RADIUS length %d too short", len(data)) + } + + radius.BaseLayer = BaseLayer{Contents: data} + + radius.Code = RADIUSCode(data[0]) + radius.Identifier = RADIUSIdentifier(data[1]) + radius.Length = RADIUSLength(binary.BigEndian.Uint16(data[2:4])) + + if int(radius.Length) > radiusMaximumRecordSizeInBytes { + df.SetTruncated() + return fmt.Errorf("RADIUS length %d too big", radius.Length) + } + + if int(radius.Length) < radiusMinimumRecordSizeInBytes { + df.SetTruncated() + return fmt.Errorf("RADIUS length %d too short", radius.Length) + } + + // RFC 2865 3. Packet Format + // `If the packet is shorter than the Length field indicates, it MUST be silently discarded.` + if int(radius.Length) > len(data) { + df.SetTruncated() + return fmt.Errorf("RADIUS length %d too big", radius.Length) + } + + // RFC 2865 3. Packet Format + // `Octets outside the range of the Length field MUST be treated as padding and ignored on reception.` + if int(radius.Length) < len(data) { + df.SetTruncated() + data = data[:radius.Length] + } + + copy(radius.Authenticator[:], data[4:20]) + + if len(data) == radiusMinimumRecordSizeInBytes { + return nil + } + + pos := radiusMinimumRecordSizeInBytes + for { + if len(data) == pos { + break + } + + if len(data[pos:]) < radiusAttributesMinimumRecordSizeInBytes { + df.SetTruncated() + return fmt.Errorf("RADIUS attributes length %d too short", len(data[pos:])) + } + + attr := RADIUSAttribute{} + attr.Type = RADIUSAttributeType(data[pos]) + attr.Length = RADIUSAttributeLength(data[pos+1]) + + if int(attr.Length) > len(data[pos:]) { + df.SetTruncated() + return fmt.Errorf("RADIUS attributes length %d too big", attr.Length) + } + + if int(attr.Length) < radiusAttributesMinimumRecordSizeInBytes { + df.SetTruncated() + return fmt.Errorf("RADIUS attributes length %d too short", attr.Length) + } + + if int(attr.Length) > radiusAttributesMinimumRecordSizeInBytes { + attr.Value = make([]byte, attr.Length-2) + copy(attr.Value[:], data[pos+2:pos+int(attr.Length)]) + radius.Attributes = append(radius.Attributes, attr) + } + + pos += int(attr.Length) + } + + for _, v := range radius.Attributes { + if v.Type == RADIUSAttributeTypeEAPMessage { + radius.BaseLayer.Payload = append(radius.BaseLayer.Payload, v.Value...) + } + } + + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (radius *RADIUS) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + plen, err := radius.Len() + if err != nil { + return err + } + + if opts.FixLengths { + radius.Length = RADIUSLength(plen) + } + + data, err := b.PrependBytes(plen) + if err != nil { + return err + } + + data[0] = byte(radius.Code) + data[1] = byte(radius.Identifier) + binary.BigEndian.PutUint16(data[2:], uint16(radius.Length)) + copy(data[4:20], radius.Authenticator[:]) + + pos := radiusMinimumRecordSizeInBytes + for _, v := range radius.Attributes { + if opts.FixLengths { + v.Length, err = attributeValueLength(v.Value) + if err != nil { + return err + } + } + + data[pos] = byte(v.Type) + data[pos+1] = byte(v.Length) + copy(data[pos+2:], v.Value[:]) + + pos += len(v.Value) + 2 // Added Type and Length + } + + return nil +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode. +func (radius *RADIUS) CanDecode() gopacket.LayerClass { + return LayerTypeRADIUS +} + +// NextLayerType returns the layer type contained by this DecodingLayer. +func (radius *RADIUS) NextLayerType() gopacket.LayerType { + if len(radius.BaseLayer.Payload) > 0 { + return LayerTypeEAP + } else { + return gopacket.LayerTypeZero + } +} + +// Payload returns the EAP Type-Data for EAP-Message attributes. +func (radius *RADIUS) Payload() []byte { + return radius.BaseLayer.Payload +} + +func decodeRADIUS(data []byte, p gopacket.PacketBuilder) error { + radius := &RADIUS{} + err := radius.DecodeFromBytes(data, p) + if err != nil { + return err + } + p.AddLayer(radius) + p.SetApplicationLayer(radius) + next := radius.NextLayerType() + if next == gopacket.LayerTypeZero { + return nil + } + return p.NextDecoder(next) +} + +func attributeValueLength(v []byte) (RADIUSAttributeLength, error) { + n := len(v) + if n > 255 { + return 0, fmt.Errorf("RADIUS attribute value length %d too long", n) + } else { + return RADIUSAttributeLength(n), nil + } +} diff --git a/backend/vendor/github.com/google/gopacket/layers/rmcp.go b/backend/vendor/github.com/google/gopacket/layers/rmcp.go new file mode 100644 index 0000000..5474fee --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/rmcp.go @@ -0,0 +1,170 @@ +// Copyright 2019 The GoPacket Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style license that can be found +// in the LICENSE file in the root of the source tree. + +package layers + +// This file implements the ASF-RMCP header specified in section 3.2.2.2 of +// https://www.dmtf.org/sites/default/files/standards/documents/DSP0136.pdf + +import ( + "fmt" + + "github.com/google/gopacket" +) + +// RMCPClass is the class of a RMCP layer's payload, e.g. ASF or IPMI. This is a +// 4-bit unsigned int on the wire; all but 6 (ASF), 7 (IPMI) and 8 (OEM-defined) +// are currently reserved. +type RMCPClass uint8 + +// LayerType returns the payload layer type corresponding to a RMCP class. +func (c RMCPClass) LayerType() gopacket.LayerType { + if lt := rmcpClassLayerTypes[uint8(c)]; lt != 0 { + return lt + } + return gopacket.LayerTypePayload +} + +func (c RMCPClass) String() string { + return fmt.Sprintf("%v(%v)", uint8(c), c.LayerType()) +} + +const ( + // RMCPVersion1 identifies RMCP v1.0 in the Version header field. Lower + // values are considered legacy, while higher values are reserved by the + // specification. + RMCPVersion1 uint8 = 0x06 + + // RMCPNormal indicates a "normal" message, i.e. not an acknowledgement. + RMCPNormal uint8 = 0 + + // RMCPAck indicates a message is acknowledging a received normal message. + RMCPAck uint8 = 1 << 7 + + // RMCPClassASF identifies an RMCP message as containing an ASF-RMCP + // payload. + RMCPClassASF RMCPClass = 0x06 + + // RMCPClassIPMI identifies an RMCP message as containing an IPMI payload. + RMCPClassIPMI RMCPClass = 0x07 + + // RMCPClassOEM identifies an RMCP message as containing an OEM-defined + // payload. + RMCPClassOEM RMCPClass = 0x08 +) + +var ( + rmcpClassLayerTypes = [16]gopacket.LayerType{ + RMCPClassASF: LayerTypeASF, + // RMCPClassIPMI is to implement; RMCPClassOEM is deliberately not + // implemented, so we return LayerTypePayload + } +) + +// RegisterRMCPLayerType allows specifying that the payload of a RMCP packet of +// a certain class should processed by the provided layer type. This overrides +// any existing registrations, including defaults. +func RegisterRMCPLayerType(c RMCPClass, l gopacket.LayerType) { + rmcpClassLayerTypes[c] = l +} + +// RMCP describes the format of an RMCP header, which forms a UDP payload. See +// section 3.2.2.2. +type RMCP struct { + BaseLayer + + // Version identifies the version of the RMCP header. 0x06 indicates RMCP + // v1.0; lower values are legacy, higher values are reserved. + Version uint8 + + // Sequence is the sequence number assicated with the message. Note that + // this rolls over to 0 after 254, not 255. Seq num 255 indicates the + // receiver must not send an ACK. + Sequence uint8 + + // Ack indicates whether this packet is an acknowledgement. If it is, the + // payload will be empty. + Ack bool + + // Class idicates the structure of the payload. There are only 2^4 valid + // values, however there is no uint4 data type. N.B. the Ack bit has been + // split off into another field. The most significant 4 bits of this field + // will always be 0. + Class RMCPClass +} + +// LayerType returns LayerTypeRMCP. It partially satisfies Layer and +// SerializableLayer. +func (*RMCP) LayerType() gopacket.LayerType { + return LayerTypeRMCP +} + +// CanDecode returns LayerTypeRMCP. It partially satisfies DecodingLayer. +func (r *RMCP) CanDecode() gopacket.LayerClass { + return r.LayerType() +} + +// DecodeFromBytes makes the layer represent the provided bytes. It partially +// satisfies DecodingLayer. +func (r *RMCP) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 4 { + df.SetTruncated() + return fmt.Errorf("invalid RMCP header, length %v less than 4", + len(data)) + } + + r.BaseLayer.Contents = data[:4] + r.BaseLayer.Payload = data[4:] + + r.Version = uint8(data[0]) + // 1 byte reserved + r.Sequence = uint8(data[2]) + r.Ack = data[3]&RMCPAck != 0 + r.Class = RMCPClass(data[3] & 0xF) + return nil +} + +// NextLayerType returns the data layer of this RMCP layer. This partially +// satisfies DecodingLayer. +func (r *RMCP) NextLayerType() gopacket.LayerType { + return r.Class.LayerType() +} + +// Payload returns the data layer. It partially satisfies ApplicationLayer. +func (r *RMCP) Payload() []byte { + return r.BaseLayer.Payload +} + +// SerializeTo writes the serialized fom of this layer into the SerializeBuffer, +// partially satisfying SerializableLayer. +func (r *RMCP) SerializeTo(b gopacket.SerializeBuffer, _ gopacket.SerializeOptions) error { + // The IPMI v1.5 spec contains a pad byte for frame sizes of certain lengths + // to work around issues in LAN chips. This is no longer necessary as of + // IPMI v2.0 (renamed to "legacy pad") so we do not attempt to add it. The + // same approach is taken by FreeIPMI: + // http://git.savannah.gnu.org/cgit/freeipmi.git/tree/libfreeipmi/interface/ipmi-lan-interface.c?id=b5ffcd38317daf42074458879f4c55ba6804a595#n836 + bytes, err := b.PrependBytes(4) + if err != nil { + return err + } + bytes[0] = r.Version + bytes[1] = 0x00 + bytes[2] = r.Sequence + bytes[3] = bool2uint8(r.Ack)<<7 | uint8(r.Class) // thanks, BFD layer + return nil +} + +// decodeRMCP decodes the byte slice into an RMCP type, and sets the application +// layer to it. +func decodeRMCP(data []byte, p gopacket.PacketBuilder) error { + rmcp := &RMCP{} + err := rmcp.DecodeFromBytes(data, p) + p.AddLayer(rmcp) + p.SetApplicationLayer(rmcp) + if err != nil { + return err + } + return p.NextDecoder(rmcp.NextLayerType()) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/rudp.go b/backend/vendor/github.com/google/gopacket/layers/rudp.go new file mode 100644 index 0000000..8435129 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/rudp.go @@ -0,0 +1,93 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "fmt" + "github.com/google/gopacket" +) + +type RUDP struct { + BaseLayer + SYN, ACK, EACK, RST, NUL bool + Version uint8 + HeaderLength uint8 + SrcPort, DstPort RUDPPort + DataLength uint16 + Seq, Ack, Checksum uint32 + VariableHeaderArea []byte + // RUDPHeaderSyn contains SYN information for the RUDP packet, + // if the SYN flag is set + *RUDPHeaderSYN + // RUDPHeaderEack contains EACK information for the RUDP packet, + // if the EACK flag is set. + *RUDPHeaderEACK +} + +type RUDPHeaderSYN struct { + MaxOutstandingSegments, MaxSegmentSize, OptionFlags uint16 +} + +type RUDPHeaderEACK struct { + SeqsReceivedOK []uint32 +} + +// LayerType returns gopacket.LayerTypeRUDP. +func (r *RUDP) LayerType() gopacket.LayerType { return LayerTypeRUDP } + +func decodeRUDP(data []byte, p gopacket.PacketBuilder) error { + r := &RUDP{ + SYN: data[0]&0x80 != 0, + ACK: data[0]&0x40 != 0, + EACK: data[0]&0x20 != 0, + RST: data[0]&0x10 != 0, + NUL: data[0]&0x08 != 0, + Version: data[0] & 0x3, + HeaderLength: data[1], + SrcPort: RUDPPort(data[2]), + DstPort: RUDPPort(data[3]), + DataLength: binary.BigEndian.Uint16(data[4:6]), + Seq: binary.BigEndian.Uint32(data[6:10]), + Ack: binary.BigEndian.Uint32(data[10:14]), + Checksum: binary.BigEndian.Uint32(data[14:18]), + } + if r.HeaderLength < 9 { + return fmt.Errorf("RUDP packet with too-short header length %d", r.HeaderLength) + } + hlen := int(r.HeaderLength) * 2 + r.Contents = data[:hlen] + r.Payload = data[hlen : hlen+int(r.DataLength)] + r.VariableHeaderArea = data[18:hlen] + headerData := r.VariableHeaderArea + switch { + case r.SYN: + if len(headerData) != 6 { + return fmt.Errorf("RUDP packet invalid SYN header length: %d", len(headerData)) + } + r.RUDPHeaderSYN = &RUDPHeaderSYN{ + MaxOutstandingSegments: binary.BigEndian.Uint16(headerData[:2]), + MaxSegmentSize: binary.BigEndian.Uint16(headerData[2:4]), + OptionFlags: binary.BigEndian.Uint16(headerData[4:6]), + } + case r.EACK: + if len(headerData)%4 != 0 { + return fmt.Errorf("RUDP packet invalid EACK header length: %d", len(headerData)) + } + r.RUDPHeaderEACK = &RUDPHeaderEACK{make([]uint32, len(headerData)/4)} + for i := 0; i < len(headerData); i += 4 { + r.SeqsReceivedOK[i/4] = binary.BigEndian.Uint32(headerData[i : i+4]) + } + } + p.AddLayer(r) + p.SetTransportLayer(r) + return p.NextDecoder(gopacket.LayerTypePayload) +} + +func (r *RUDP) TransportFlow() gopacket.Flow { + return gopacket.NewFlow(EndpointRUDPPort, []byte{byte(r.SrcPort)}, []byte{byte(r.DstPort)}) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/sctp.go b/backend/vendor/github.com/google/gopacket/layers/sctp.go new file mode 100644 index 0000000..511176e --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/sctp.go @@ -0,0 +1,746 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + "hash/crc32" + + "github.com/google/gopacket" +) + +// SCTP contains information on the top level of an SCTP packet. +type SCTP struct { + BaseLayer + SrcPort, DstPort SCTPPort + VerificationTag uint32 + Checksum uint32 + sPort, dPort []byte +} + +// LayerType returns gopacket.LayerTypeSCTP +func (s *SCTP) LayerType() gopacket.LayerType { return LayerTypeSCTP } + +func decodeSCTP(data []byte, p gopacket.PacketBuilder) error { + sctp := &SCTP{} + err := sctp.DecodeFromBytes(data, p) + p.AddLayer(sctp) + p.SetTransportLayer(sctp) + if err != nil { + return err + } + return p.NextDecoder(sctpChunkTypePrefixDecoder) +} + +var sctpChunkTypePrefixDecoder = gopacket.DecodeFunc(decodeWithSCTPChunkTypePrefix) + +// TransportFlow returns a flow based on the source and destination SCTP port. +func (s *SCTP) TransportFlow() gopacket.Flow { + return gopacket.NewFlow(EndpointSCTPPort, s.sPort, s.dPort) +} + +func decodeWithSCTPChunkTypePrefix(data []byte, p gopacket.PacketBuilder) error { + chunkType := SCTPChunkType(data[0]) + return chunkType.Decode(data, p) +} + +// SerializeTo is for gopacket.SerializableLayer. +func (s SCTP) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + bytes, err := b.PrependBytes(12) + if err != nil { + return err + } + binary.BigEndian.PutUint16(bytes[0:2], uint16(s.SrcPort)) + binary.BigEndian.PutUint16(bytes[2:4], uint16(s.DstPort)) + binary.BigEndian.PutUint32(bytes[4:8], s.VerificationTag) + if opts.ComputeChecksums { + // Note: MakeTable(Castagnoli) actually only creates the table once, then + // passes back a singleton on every other call, so this shouldn't cause + // excessive memory allocation. + binary.LittleEndian.PutUint32(bytes[8:12], crc32.Checksum(b.Bytes(), crc32.MakeTable(crc32.Castagnoli))) + } + return nil +} + +func (sctp *SCTP) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 12 { + return errors.New("Invalid SCTP common header length") + } + sctp.SrcPort = SCTPPort(binary.BigEndian.Uint16(data[:2])) + sctp.sPort = data[:2] + sctp.DstPort = SCTPPort(binary.BigEndian.Uint16(data[2:4])) + sctp.dPort = data[2:4] + sctp.VerificationTag = binary.BigEndian.Uint32(data[4:8]) + sctp.Checksum = binary.BigEndian.Uint32(data[8:12]) + sctp.BaseLayer = BaseLayer{data[:12], data[12:]} + + return nil +} + +func (t *SCTP) CanDecode() gopacket.LayerClass { + return LayerTypeSCTP +} + +func (t *SCTP) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +// SCTPChunk contains the common fields in all SCTP chunks. +type SCTPChunk struct { + BaseLayer + Type SCTPChunkType + Flags uint8 + Length uint16 + // ActualLength is the total length of an SCTP chunk, including padding. + // SCTP chunks start and end on 4-byte boundaries. So if a chunk has a length + // of 18, it means that it has data up to and including byte 18, then padding + // up to the next 4-byte boundary, 20. In this case, Length would be 18, and + // ActualLength would be 20. + ActualLength int +} + +func roundUpToNearest4(i int) int { + if i%4 == 0 { + return i + } + return i + 4 - (i % 4) +} + +func decodeSCTPChunk(data []byte) (SCTPChunk, error) { + length := binary.BigEndian.Uint16(data[2:4]) + if length < 4 { + return SCTPChunk{}, errors.New("invalid SCTP chunk length") + } + actual := roundUpToNearest4(int(length)) + ct := SCTPChunkType(data[0]) + + // For SCTP Data, use a separate layer for the payload + delta := 0 + if ct == SCTPChunkTypeData { + delta = int(actual) - int(length) + actual = 16 + } + + return SCTPChunk{ + Type: ct, + Flags: data[1], + Length: length, + ActualLength: actual, + BaseLayer: BaseLayer{data[:actual], data[actual : len(data)-delta]}, + }, nil +} + +// SCTPParameter is a TLV parameter inside a SCTPChunk. +type SCTPParameter struct { + Type uint16 + Length uint16 + ActualLength int + Value []byte +} + +func decodeSCTPParameter(data []byte) SCTPParameter { + length := binary.BigEndian.Uint16(data[2:4]) + return SCTPParameter{ + Type: binary.BigEndian.Uint16(data[0:2]), + Length: length, + Value: data[4:length], + ActualLength: roundUpToNearest4(int(length)), + } +} + +func (p SCTPParameter) Bytes() []byte { + length := 4 + len(p.Value) + data := make([]byte, roundUpToNearest4(length)) + binary.BigEndian.PutUint16(data[0:2], p.Type) + binary.BigEndian.PutUint16(data[2:4], uint16(length)) + copy(data[4:], p.Value) + return data +} + +// SCTPUnknownChunkType is the layer type returned when we don't recognize the +// chunk type. Since there's a length in a known location, we can skip over +// it even if we don't know what it is, and continue parsing the rest of the +// chunks. This chunk is stored as an ErrorLayer in the packet. +type SCTPUnknownChunkType struct { + SCTPChunk + bytes []byte +} + +func decodeSCTPChunkTypeUnknown(data []byte, p gopacket.PacketBuilder) error { + chunk, err := decodeSCTPChunk(data) + if err != nil { + return err + } + sc := &SCTPUnknownChunkType{SCTPChunk: chunk} + sc.bytes = data[:sc.ActualLength] + p.AddLayer(sc) + p.SetErrorLayer(sc) + return p.NextDecoder(gopacket.DecodeFunc(decodeWithSCTPChunkTypePrefix)) +} + +// SerializeTo is for gopacket.SerializableLayer. +func (s SCTPUnknownChunkType) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + bytes, err := b.PrependBytes(s.ActualLength) + if err != nil { + return err + } + copy(bytes, s.bytes) + return nil +} + +// LayerType returns gopacket.LayerTypeSCTPUnknownChunkType. +func (s *SCTPUnknownChunkType) LayerType() gopacket.LayerType { return LayerTypeSCTPUnknownChunkType } + +// Payload returns all bytes in this header, including the decoded Type, Length, +// and Flags. +func (s *SCTPUnknownChunkType) Payload() []byte { return s.bytes } + +// Error implements ErrorLayer. +func (s *SCTPUnknownChunkType) Error() error { + return fmt.Errorf("No decode method available for SCTP chunk type %s", s.Type) +} + +// SCTPData is the SCTP Data chunk layer. +type SCTPData struct { + SCTPChunk + Unordered, BeginFragment, EndFragment bool + TSN uint32 + StreamId uint16 + StreamSequence uint16 + PayloadProtocol SCTPPayloadProtocol +} + +// LayerType returns gopacket.LayerTypeSCTPData. +func (s *SCTPData) LayerType() gopacket.LayerType { return LayerTypeSCTPData } + +// SCTPPayloadProtocol represents a payload protocol +type SCTPPayloadProtocol uint32 + +// SCTPPayloadProtocol constonts from http://www.iana.org/assignments/sctp-parameters/sctp-parameters.xhtml +const ( + SCTPProtocolReserved SCTPPayloadProtocol = 0 + SCTPPayloadUIA = 1 + SCTPPayloadM2UA = 2 + SCTPPayloadM3UA = 3 + SCTPPayloadSUA = 4 + SCTPPayloadM2PA = 5 + SCTPPayloadV5UA = 6 + SCTPPayloadH248 = 7 + SCTPPayloadBICC = 8 + SCTPPayloadTALI = 9 + SCTPPayloadDUA = 10 + SCTPPayloadASAP = 11 + SCTPPayloadENRP = 12 + SCTPPayloadH323 = 13 + SCTPPayloadQIPC = 14 + SCTPPayloadSIMCO = 15 + SCTPPayloadDDPSegment = 16 + SCTPPayloadDDPStream = 17 + SCTPPayloadS1AP = 18 +) + +func (p SCTPPayloadProtocol) String() string { + switch p { + case SCTPProtocolReserved: + return "Reserved" + case SCTPPayloadUIA: + return "UIA" + case SCTPPayloadM2UA: + return "M2UA" + case SCTPPayloadM3UA: + return "M3UA" + case SCTPPayloadSUA: + return "SUA" + case SCTPPayloadM2PA: + return "M2PA" + case SCTPPayloadV5UA: + return "V5UA" + case SCTPPayloadH248: + return "H.248" + case SCTPPayloadBICC: + return "BICC" + case SCTPPayloadTALI: + return "TALI" + case SCTPPayloadDUA: + return "DUA" + case SCTPPayloadASAP: + return "ASAP" + case SCTPPayloadENRP: + return "ENRP" + case SCTPPayloadH323: + return "H.323" + case SCTPPayloadQIPC: + return "QIPC" + case SCTPPayloadSIMCO: + return "SIMCO" + case SCTPPayloadDDPSegment: + return "DDPSegment" + case SCTPPayloadDDPStream: + return "DDPStream" + case SCTPPayloadS1AP: + return "S1AP" + } + return fmt.Sprintf("Unknown(%d)", p) +} + +func decodeSCTPData(data []byte, p gopacket.PacketBuilder) error { + chunk, err := decodeSCTPChunk(data) + if err != nil { + return err + } + sc := &SCTPData{ + SCTPChunk: chunk, + Unordered: data[1]&0x4 != 0, + BeginFragment: data[1]&0x2 != 0, + EndFragment: data[1]&0x1 != 0, + TSN: binary.BigEndian.Uint32(data[4:8]), + StreamId: binary.BigEndian.Uint16(data[8:10]), + StreamSequence: binary.BigEndian.Uint16(data[10:12]), + PayloadProtocol: SCTPPayloadProtocol(binary.BigEndian.Uint32(data[12:16])), + } + // Length is the length in bytes of the data, INCLUDING the 16-byte header. + p.AddLayer(sc) + return p.NextDecoder(gopacket.LayerTypePayload) +} + +// SerializeTo is for gopacket.SerializableLayer. +func (sc SCTPData) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + payload := b.Bytes() + // Pad the payload to a 32 bit boundary + if rem := len(payload) % 4; rem != 0 { + b.AppendBytes(4 - rem) + } + length := 16 + bytes, err := b.PrependBytes(length) + if err != nil { + return err + } + bytes[0] = uint8(sc.Type) + flags := uint8(0) + if sc.Unordered { + flags |= 0x4 + } + if sc.BeginFragment { + flags |= 0x2 + } + if sc.EndFragment { + flags |= 0x1 + } + bytes[1] = flags + binary.BigEndian.PutUint16(bytes[2:4], uint16(length+len(payload))) + binary.BigEndian.PutUint32(bytes[4:8], sc.TSN) + binary.BigEndian.PutUint16(bytes[8:10], sc.StreamId) + binary.BigEndian.PutUint16(bytes[10:12], sc.StreamSequence) + binary.BigEndian.PutUint32(bytes[12:16], uint32(sc.PayloadProtocol)) + return nil +} + +// SCTPInitParameter is a parameter for an SCTP Init or InitAck packet. +type SCTPInitParameter SCTPParameter + +// SCTPInit is used as the return value for both SCTPInit and SCTPInitAck +// messages. +type SCTPInit struct { + SCTPChunk + InitiateTag uint32 + AdvertisedReceiverWindowCredit uint32 + OutboundStreams, InboundStreams uint16 + InitialTSN uint32 + Parameters []SCTPInitParameter +} + +// LayerType returns either gopacket.LayerTypeSCTPInit or gopacket.LayerTypeSCTPInitAck. +func (sc *SCTPInit) LayerType() gopacket.LayerType { + if sc.Type == SCTPChunkTypeInitAck { + return LayerTypeSCTPInitAck + } + // sc.Type == SCTPChunkTypeInit + return LayerTypeSCTPInit +} + +func decodeSCTPInit(data []byte, p gopacket.PacketBuilder) error { + chunk, err := decodeSCTPChunk(data) + if err != nil { + return err + } + sc := &SCTPInit{ + SCTPChunk: chunk, + InitiateTag: binary.BigEndian.Uint32(data[4:8]), + AdvertisedReceiverWindowCredit: binary.BigEndian.Uint32(data[8:12]), + OutboundStreams: binary.BigEndian.Uint16(data[12:14]), + InboundStreams: binary.BigEndian.Uint16(data[14:16]), + InitialTSN: binary.BigEndian.Uint32(data[16:20]), + } + paramData := data[20:sc.ActualLength] + for len(paramData) > 0 { + p := SCTPInitParameter(decodeSCTPParameter(paramData)) + paramData = paramData[p.ActualLength:] + sc.Parameters = append(sc.Parameters, p) + } + p.AddLayer(sc) + return p.NextDecoder(gopacket.DecodeFunc(decodeWithSCTPChunkTypePrefix)) +} + +// SerializeTo is for gopacket.SerializableLayer. +func (sc SCTPInit) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + var payload []byte + for _, param := range sc.Parameters { + payload = append(payload, SCTPParameter(param).Bytes()...) + } + length := 20 + len(payload) + bytes, err := b.PrependBytes(roundUpToNearest4(length)) + if err != nil { + return err + } + bytes[0] = uint8(sc.Type) + bytes[1] = sc.Flags + binary.BigEndian.PutUint16(bytes[2:4], uint16(length)) + binary.BigEndian.PutUint32(bytes[4:8], sc.InitiateTag) + binary.BigEndian.PutUint32(bytes[8:12], sc.AdvertisedReceiverWindowCredit) + binary.BigEndian.PutUint16(bytes[12:14], sc.OutboundStreams) + binary.BigEndian.PutUint16(bytes[14:16], sc.InboundStreams) + binary.BigEndian.PutUint32(bytes[16:20], sc.InitialTSN) + copy(bytes[20:], payload) + return nil +} + +// SCTPSack is the SCTP Selective ACK chunk layer. +type SCTPSack struct { + SCTPChunk + CumulativeTSNAck uint32 + AdvertisedReceiverWindowCredit uint32 + NumGapACKs, NumDuplicateTSNs uint16 + GapACKs []uint16 + DuplicateTSNs []uint32 +} + +// LayerType return LayerTypeSCTPSack +func (sc *SCTPSack) LayerType() gopacket.LayerType { + return LayerTypeSCTPSack +} + +func decodeSCTPSack(data []byte, p gopacket.PacketBuilder) error { + chunk, err := decodeSCTPChunk(data) + if err != nil { + return err + } + sc := &SCTPSack{ + SCTPChunk: chunk, + CumulativeTSNAck: binary.BigEndian.Uint32(data[4:8]), + AdvertisedReceiverWindowCredit: binary.BigEndian.Uint32(data[8:12]), + NumGapACKs: binary.BigEndian.Uint16(data[12:14]), + NumDuplicateTSNs: binary.BigEndian.Uint16(data[14:16]), + } + // We maximize gapAcks and dupTSNs here so we're not allocating tons + // of memory based on a user-controlable field. Our maximums are not exact, + // but should give us sane defaults... we'll still hit slice boundaries and + // fail if the user-supplied values are too high (in the for loops below), but + // the amount of memory we'll have allocated because of that should be small + // (< sc.ActualLength) + gapAcks := sc.SCTPChunk.ActualLength / 2 + dupTSNs := (sc.SCTPChunk.ActualLength - gapAcks*2) / 4 + if gapAcks > int(sc.NumGapACKs) { + gapAcks = int(sc.NumGapACKs) + } + if dupTSNs > int(sc.NumDuplicateTSNs) { + dupTSNs = int(sc.NumDuplicateTSNs) + } + sc.GapACKs = make([]uint16, 0, gapAcks) + sc.DuplicateTSNs = make([]uint32, 0, dupTSNs) + bytesRemaining := data[16:] + for i := 0; i < int(sc.NumGapACKs); i++ { + sc.GapACKs = append(sc.GapACKs, binary.BigEndian.Uint16(bytesRemaining[:2])) + bytesRemaining = bytesRemaining[2:] + } + for i := 0; i < int(sc.NumDuplicateTSNs); i++ { + sc.DuplicateTSNs = append(sc.DuplicateTSNs, binary.BigEndian.Uint32(bytesRemaining[:4])) + bytesRemaining = bytesRemaining[4:] + } + p.AddLayer(sc) + return p.NextDecoder(gopacket.DecodeFunc(decodeWithSCTPChunkTypePrefix)) +} + +// SerializeTo is for gopacket.SerializableLayer. +func (sc SCTPSack) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + length := 16 + 2*len(sc.GapACKs) + 4*len(sc.DuplicateTSNs) + bytes, err := b.PrependBytes(roundUpToNearest4(length)) + if err != nil { + return err + } + bytes[0] = uint8(sc.Type) + bytes[1] = sc.Flags + binary.BigEndian.PutUint16(bytes[2:4], uint16(length)) + binary.BigEndian.PutUint32(bytes[4:8], sc.CumulativeTSNAck) + binary.BigEndian.PutUint32(bytes[8:12], sc.AdvertisedReceiverWindowCredit) + binary.BigEndian.PutUint16(bytes[12:14], uint16(len(sc.GapACKs))) + binary.BigEndian.PutUint16(bytes[14:16], uint16(len(sc.DuplicateTSNs))) + for i, v := range sc.GapACKs { + binary.BigEndian.PutUint16(bytes[16+i*2:], v) + } + offset := 16 + 2*len(sc.GapACKs) + for i, v := range sc.DuplicateTSNs { + binary.BigEndian.PutUint32(bytes[offset+i*4:], v) + } + return nil +} + +// SCTPHeartbeatParameter is the parameter type used by SCTP heartbeat and +// heartbeat ack layers. +type SCTPHeartbeatParameter SCTPParameter + +// SCTPHeartbeat is the SCTP heartbeat layer, also used for heatbeat ack. +type SCTPHeartbeat struct { + SCTPChunk + Parameters []SCTPHeartbeatParameter +} + +// LayerType returns gopacket.LayerTypeSCTPHeartbeat. +func (sc *SCTPHeartbeat) LayerType() gopacket.LayerType { + if sc.Type == SCTPChunkTypeHeartbeatAck { + return LayerTypeSCTPHeartbeatAck + } + // sc.Type == SCTPChunkTypeHeartbeat + return LayerTypeSCTPHeartbeat +} + +func decodeSCTPHeartbeat(data []byte, p gopacket.PacketBuilder) error { + chunk, err := decodeSCTPChunk(data) + if err != nil { + return err + } + sc := &SCTPHeartbeat{ + SCTPChunk: chunk, + } + paramData := data[4:sc.Length] + for len(paramData) > 0 { + p := SCTPHeartbeatParameter(decodeSCTPParameter(paramData)) + paramData = paramData[p.ActualLength:] + sc.Parameters = append(sc.Parameters, p) + } + p.AddLayer(sc) + return p.NextDecoder(gopacket.DecodeFunc(decodeWithSCTPChunkTypePrefix)) +} + +// SerializeTo is for gopacket.SerializableLayer. +func (sc SCTPHeartbeat) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + var payload []byte + for _, param := range sc.Parameters { + payload = append(payload, SCTPParameter(param).Bytes()...) + } + length := 4 + len(payload) + + bytes, err := b.PrependBytes(roundUpToNearest4(length)) + if err != nil { + return err + } + bytes[0] = uint8(sc.Type) + bytes[1] = sc.Flags + binary.BigEndian.PutUint16(bytes[2:4], uint16(length)) + copy(bytes[4:], payload) + return nil +} + +// SCTPErrorParameter is the parameter type used by SCTP Abort and Error layers. +type SCTPErrorParameter SCTPParameter + +// SCTPError is the SCTP error layer, also used for SCTP aborts. +type SCTPError struct { + SCTPChunk + Parameters []SCTPErrorParameter +} + +// LayerType returns LayerTypeSCTPAbort or LayerTypeSCTPError. +func (sc *SCTPError) LayerType() gopacket.LayerType { + if sc.Type == SCTPChunkTypeAbort { + return LayerTypeSCTPAbort + } + // sc.Type == SCTPChunkTypeError + return LayerTypeSCTPError +} + +func decodeSCTPError(data []byte, p gopacket.PacketBuilder) error { + // remarkably similar to decodeSCTPHeartbeat ;) + chunk, err := decodeSCTPChunk(data) + if err != nil { + return err + } + sc := &SCTPError{ + SCTPChunk: chunk, + } + paramData := data[4:sc.Length] + for len(paramData) > 0 { + p := SCTPErrorParameter(decodeSCTPParameter(paramData)) + paramData = paramData[p.ActualLength:] + sc.Parameters = append(sc.Parameters, p) + } + p.AddLayer(sc) + return p.NextDecoder(gopacket.DecodeFunc(decodeWithSCTPChunkTypePrefix)) +} + +// SerializeTo is for gopacket.SerializableLayer. +func (sc SCTPError) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + var payload []byte + for _, param := range sc.Parameters { + payload = append(payload, SCTPParameter(param).Bytes()...) + } + length := 4 + len(payload) + + bytes, err := b.PrependBytes(roundUpToNearest4(length)) + if err != nil { + return err + } + bytes[0] = uint8(sc.Type) + bytes[1] = sc.Flags + binary.BigEndian.PutUint16(bytes[2:4], uint16(length)) + copy(bytes[4:], payload) + return nil +} + +// SCTPShutdown is the SCTP shutdown layer. +type SCTPShutdown struct { + SCTPChunk + CumulativeTSNAck uint32 +} + +// LayerType returns gopacket.LayerTypeSCTPShutdown. +func (sc *SCTPShutdown) LayerType() gopacket.LayerType { return LayerTypeSCTPShutdown } + +func decodeSCTPShutdown(data []byte, p gopacket.PacketBuilder) error { + chunk, err := decodeSCTPChunk(data) + if err != nil { + return err + } + sc := &SCTPShutdown{ + SCTPChunk: chunk, + CumulativeTSNAck: binary.BigEndian.Uint32(data[4:8]), + } + p.AddLayer(sc) + return p.NextDecoder(gopacket.DecodeFunc(decodeWithSCTPChunkTypePrefix)) +} + +// SerializeTo is for gopacket.SerializableLayer. +func (sc SCTPShutdown) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + bytes, err := b.PrependBytes(8) + if err != nil { + return err + } + bytes[0] = uint8(sc.Type) + bytes[1] = sc.Flags + binary.BigEndian.PutUint16(bytes[2:4], 8) + binary.BigEndian.PutUint32(bytes[4:8], sc.CumulativeTSNAck) + return nil +} + +// SCTPShutdownAck is the SCTP shutdown layer. +type SCTPShutdownAck struct { + SCTPChunk +} + +// LayerType returns gopacket.LayerTypeSCTPShutdownAck. +func (sc *SCTPShutdownAck) LayerType() gopacket.LayerType { return LayerTypeSCTPShutdownAck } + +func decodeSCTPShutdownAck(data []byte, p gopacket.PacketBuilder) error { + chunk, err := decodeSCTPChunk(data) + if err != nil { + return err + } + sc := &SCTPShutdownAck{ + SCTPChunk: chunk, + } + p.AddLayer(sc) + return p.NextDecoder(gopacket.DecodeFunc(decodeWithSCTPChunkTypePrefix)) +} + +// SerializeTo is for gopacket.SerializableLayer. +func (sc SCTPShutdownAck) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + bytes, err := b.PrependBytes(4) + if err != nil { + return err + } + bytes[0] = uint8(sc.Type) + bytes[1] = sc.Flags + binary.BigEndian.PutUint16(bytes[2:4], 4) + return nil +} + +// SCTPCookieEcho is the SCTP Cookie Echo layer. +type SCTPCookieEcho struct { + SCTPChunk + Cookie []byte +} + +// LayerType returns gopacket.LayerTypeSCTPCookieEcho. +func (sc *SCTPCookieEcho) LayerType() gopacket.LayerType { return LayerTypeSCTPCookieEcho } + +func decodeSCTPCookieEcho(data []byte, p gopacket.PacketBuilder) error { + chunk, err := decodeSCTPChunk(data) + if err != nil { + return err + } + sc := &SCTPCookieEcho{ + SCTPChunk: chunk, + } + sc.Cookie = data[4:sc.Length] + p.AddLayer(sc) + return p.NextDecoder(gopacket.DecodeFunc(decodeWithSCTPChunkTypePrefix)) +} + +// SerializeTo is for gopacket.SerializableLayer. +func (sc SCTPCookieEcho) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + length := 4 + len(sc.Cookie) + bytes, err := b.PrependBytes(roundUpToNearest4(length)) + if err != nil { + return err + } + bytes[0] = uint8(sc.Type) + bytes[1] = sc.Flags + binary.BigEndian.PutUint16(bytes[2:4], uint16(length)) + copy(bytes[4:], sc.Cookie) + return nil +} + +// This struct is used by all empty SCTP chunks (currently CookieAck and +// ShutdownComplete). +type SCTPEmptyLayer struct { + SCTPChunk +} + +// LayerType returns either gopacket.LayerTypeSCTPShutdownComplete or +// LayerTypeSCTPCookieAck. +func (sc *SCTPEmptyLayer) LayerType() gopacket.LayerType { + if sc.Type == SCTPChunkTypeShutdownComplete { + return LayerTypeSCTPShutdownComplete + } + // sc.Type == SCTPChunkTypeCookieAck + return LayerTypeSCTPCookieAck +} + +func decodeSCTPEmptyLayer(data []byte, p gopacket.PacketBuilder) error { + chunk, err := decodeSCTPChunk(data) + if err != nil { + return err + } + sc := &SCTPEmptyLayer{ + SCTPChunk: chunk, + } + p.AddLayer(sc) + return p.NextDecoder(gopacket.DecodeFunc(decodeWithSCTPChunkTypePrefix)) +} + +// SerializeTo is for gopacket.SerializableLayer. +func (sc SCTPEmptyLayer) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + bytes, err := b.PrependBytes(4) + if err != nil { + return err + } + bytes[0] = uint8(sc.Type) + bytes[1] = sc.Flags + binary.BigEndian.PutUint16(bytes[2:4], 4) + return nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/sflow.go b/backend/vendor/github.com/google/gopacket/layers/sflow.go new file mode 100644 index 0000000..bc1c973 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/sflow.go @@ -0,0 +1,2567 @@ +// Copyright 2014 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +/* +This layer decodes SFlow version 5 datagrams. + +The specification can be found here: http://sflow.org/sflow_version_5.txt + +Additional developer information about sflow can be found at: +http://sflow.org/developers/specifications.php + +And SFlow in general: +http://sflow.org/index.php + +Two forms of sample data are defined: compact and expanded. The +Specification has this to say: + + Compact and expand forms of counter and flow samples are defined. + An agent must not mix compact/expanded encodings. If an agent + will never use ifIndex numbers >= 2^24 then it must use compact + encodings for all interfaces. Otherwise the expanded formats must + be used for all interfaces. + +This decoder only supports the compact form, because that is the only +one for which data was available. + +The datagram is composed of one or more samples of type flow or counter, +and each sample is composed of one or more records describing the sample. +A sample is a single instance of sampled inforamtion, and each record in +the sample gives additional / supplimentary information about the sample. + +The following sample record types are supported: + + Raw Packet Header + opaque = flow_data; enterprise = 0; format = 1 + + Extended Switch Data + opaque = flow_data; enterprise = 0; format = 1001 + + Extended Router Data + opaque = flow_data; enterprise = 0; format = 1002 + + Extended Gateway Data + opaque = flow_data; enterprise = 0; format = 1003 + + Extended User Data + opaque = flow_data; enterprise = 0; format = 1004 + + Extended URL Data + opaque = flow_data; enterprise = 0; format = 1005 + +The following types of counter records are supported: + + Generic Interface Counters - see RFC 2233 + opaque = counter_data; enterprise = 0; format = 1 + + Ethernet Interface Counters - see RFC 2358 + opaque = counter_data; enterprise = 0; format = 2 + +SFlow is encoded using XDR (RFC4506). There are a few places +where the standard 4-byte fields are partitioned into two +bitfields of different lengths. I'm not sure why the designers +chose to pack together two values like this in some places, and +in others they use the entire 4-byte value to store a number that +will never be more than a few bits. In any case, there are a couple +of types defined to handle the decoding of these bitfields, and +that's why they're there. */ + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + "net" + + "github.com/google/gopacket" +) + +// SFlowRecord holds both flow sample records and counter sample records. +// A Record is the structure that actually holds the sampled data +// and / or counters. +type SFlowRecord interface { +} + +// SFlowDataSource encodes a 2-bit SFlowSourceFormat in its most significant +// 2 bits, and an SFlowSourceValue in its least significant 30 bits. +// These types and values define the meaning of the inteface information +// presented in the sample metadata. +type SFlowDataSource int32 + +func (sdc SFlowDataSource) decode() (SFlowSourceFormat, SFlowSourceValue) { + leftField := sdc >> 30 + rightField := uint32(0x3FFFFFFF) & uint32(sdc) + return SFlowSourceFormat(leftField), SFlowSourceValue(rightField) +} + +type SFlowDataSourceExpanded struct { + SourceIDClass SFlowSourceFormat + SourceIDIndex SFlowSourceValue +} + +func (sdce SFlowDataSourceExpanded) decode() (SFlowSourceFormat, SFlowSourceValue) { + leftField := sdce.SourceIDClass >> 30 + rightField := uint32(0x3FFFFFFF) & uint32(sdce.SourceIDIndex) + return SFlowSourceFormat(leftField), SFlowSourceValue(rightField) +} + +type SFlowSourceFormat uint32 + +type SFlowSourceValue uint32 + +const ( + SFlowTypeSingleInterface SFlowSourceFormat = 0 + SFlowTypePacketDiscarded SFlowSourceFormat = 1 + SFlowTypeMultipleDestinations SFlowSourceFormat = 2 +) + +func (sdf SFlowSourceFormat) String() string { + switch sdf { + case SFlowTypeSingleInterface: + return "Single Interface" + case SFlowTypePacketDiscarded: + return "Packet Discarded" + case SFlowTypeMultipleDestinations: + return "Multiple Destinations" + default: + return "UNKNOWN" + } +} + +func decodeSFlow(data []byte, p gopacket.PacketBuilder) error { + s := &SFlowDatagram{} + err := s.DecodeFromBytes(data, p) + if err != nil { + return err + } + p.AddLayer(s) + p.SetApplicationLayer(s) + return nil +} + +// SFlowDatagram is the outermost container which holds some basic information +// about the reporting agent, and holds at least one sample record +type SFlowDatagram struct { + BaseLayer + + DatagramVersion uint32 + AgentAddress net.IP + SubAgentID uint32 + SequenceNumber uint32 + AgentUptime uint32 + SampleCount uint32 + FlowSamples []SFlowFlowSample + CounterSamples []SFlowCounterSample +} + +// An SFlow datagram's outer container has the following +// structure: + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int sFlow version (2|4|5) | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int IP version of the Agent (1=v4|2=v6) | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / Agent IP address (v4=4byte|v6=16byte) / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int sub agent id | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int datagram sequence number | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int switch uptime in ms | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int n samples in datagram | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / n samples / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +// SFlowDataFormat encodes the EnterpriseID in the most +// significant 12 bits, and the SampleType in the least significant +// 20 bits. +type SFlowDataFormat uint32 + +func (sdf SFlowDataFormat) decode() (SFlowEnterpriseID, SFlowSampleType) { + leftField := sdf >> 12 + rightField := uint32(0xFFF) & uint32(sdf) + return SFlowEnterpriseID(leftField), SFlowSampleType(rightField) +} + +// SFlowEnterpriseID is used to differentiate between the +// official SFlow standard, and other, vendor-specific +// types of flow data. (Similiar to SNMP's enterprise MIB +// OIDs) Only the office SFlow Enterprise ID is decoded +// here. +type SFlowEnterpriseID uint32 + +const ( + SFlowStandard SFlowEnterpriseID = 0 +) + +func (eid SFlowEnterpriseID) String() string { + switch eid { + case SFlowStandard: + return "Standard SFlow" + default: + return "" + } +} + +func (eid SFlowEnterpriseID) GetType() SFlowEnterpriseID { + return SFlowStandard +} + +// SFlowSampleType specifies the type of sample. Only flow samples +// and counter samples are supported +type SFlowSampleType uint32 + +const ( + SFlowTypeFlowSample SFlowSampleType = 1 + SFlowTypeCounterSample SFlowSampleType = 2 + SFlowTypeExpandedFlowSample SFlowSampleType = 3 + SFlowTypeExpandedCounterSample SFlowSampleType = 4 +) + +func (st SFlowSampleType) GetType() SFlowSampleType { + switch st { + case SFlowTypeFlowSample: + return SFlowTypeFlowSample + case SFlowTypeCounterSample: + return SFlowTypeCounterSample + case SFlowTypeExpandedFlowSample: + return SFlowTypeExpandedFlowSample + case SFlowTypeExpandedCounterSample: + return SFlowTypeExpandedCounterSample + default: + panic("Invalid Sample Type") + } +} + +func (st SFlowSampleType) String() string { + switch st { + case SFlowTypeFlowSample: + return "Flow Sample" + case SFlowTypeCounterSample: + return "Counter Sample" + case SFlowTypeExpandedFlowSample: + return "Expanded Flow Sample" + case SFlowTypeExpandedCounterSample: + return "Expanded Counter Sample" + default: + return "" + } +} + +func (s *SFlowDatagram) LayerType() gopacket.LayerType { return LayerTypeSFlow } + +func (d *SFlowDatagram) Payload() []byte { return nil } + +func (d *SFlowDatagram) CanDecode() gopacket.LayerClass { return LayerTypeSFlow } + +func (d *SFlowDatagram) NextLayerType() gopacket.LayerType { return gopacket.LayerTypePayload } + +// SFlowIPType determines what form the IP address being decoded will +// take. This is an XDR union type allowing for both IPv4 and IPv6 +type SFlowIPType uint32 + +const ( + SFlowIPv4 SFlowIPType = 1 + SFlowIPv6 SFlowIPType = 2 +) + +func (s SFlowIPType) String() string { + switch s { + case SFlowIPv4: + return "IPv4" + case SFlowIPv6: + return "IPv6" + default: + return "" + } +} + +func (s SFlowIPType) Length() int { + switch s { + case SFlowIPv4: + return 4 + case SFlowIPv6: + return 16 + default: + return 0 + } +} + +func (s *SFlowDatagram) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + var agentAddressType SFlowIPType + + data, s.DatagramVersion = data[4:], binary.BigEndian.Uint32(data[:4]) + data, agentAddressType = data[4:], SFlowIPType(binary.BigEndian.Uint32(data[:4])) + data, s.AgentAddress = data[agentAddressType.Length():], data[:agentAddressType.Length()] + data, s.SubAgentID = data[4:], binary.BigEndian.Uint32(data[:4]) + data, s.SequenceNumber = data[4:], binary.BigEndian.Uint32(data[:4]) + data, s.AgentUptime = data[4:], binary.BigEndian.Uint32(data[:4]) + data, s.SampleCount = data[4:], binary.BigEndian.Uint32(data[:4]) + + if s.SampleCount < 1 { + return fmt.Errorf("SFlow Datagram has invalid sample length: %d", s.SampleCount) + } + for i := uint32(0); i < s.SampleCount; i++ { + sdf := SFlowDataFormat(binary.BigEndian.Uint32(data[:4])) + _, sampleType := sdf.decode() + switch sampleType { + case SFlowTypeFlowSample: + if flowSample, err := decodeFlowSample(&data, false); err == nil { + s.FlowSamples = append(s.FlowSamples, flowSample) + } else { + return err + } + case SFlowTypeCounterSample: + if counterSample, err := decodeCounterSample(&data, false); err == nil { + s.CounterSamples = append(s.CounterSamples, counterSample) + } else { + return err + } + case SFlowTypeExpandedFlowSample: + if flowSample, err := decodeFlowSample(&data, true); err == nil { + s.FlowSamples = append(s.FlowSamples, flowSample) + } else { + return err + } + case SFlowTypeExpandedCounterSample: + if counterSample, err := decodeCounterSample(&data, true); err == nil { + s.CounterSamples = append(s.CounterSamples, counterSample) + } else { + return err + } + + default: + return fmt.Errorf("Unsupported SFlow sample type %d", sampleType) + } + } + return nil +} + +// SFlowFlowSample represents a sampled packet and contains +// one or more records describing the packet +type SFlowFlowSample struct { + EnterpriseID SFlowEnterpriseID + Format SFlowSampleType + SampleLength uint32 + SequenceNumber uint32 + SourceIDClass SFlowSourceFormat + SourceIDIndex SFlowSourceValue + SamplingRate uint32 + SamplePool uint32 + Dropped uint32 + InputInterfaceFormat uint32 + InputInterface uint32 + OutputInterfaceFormat uint32 + OutputInterface uint32 + RecordCount uint32 + Records []SFlowRecord +} + +// Flow samples have the following structure. Note +// the bit fields to encode the Enterprise ID and the +// Flow record format: type 1 + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | sample length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int sample sequence number | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// |id type | src id index value | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int sampling rate | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int sample pool | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int drops | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int input ifIndex | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int output ifIndex | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int number of records | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / flow records / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +// Flow samples have the following structure. +// Flow record format: type 3 + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | sample length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int sample sequence number | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int src id type | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int src id index value | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int sampling rate | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int sample pool | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int drops | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int input interface format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int input interface value | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int output interface format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int output interface value | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int number of records | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / flow records / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +type SFlowFlowDataFormat uint32 + +func (fdf SFlowFlowDataFormat) decode() (SFlowEnterpriseID, SFlowFlowRecordType) { + leftField := fdf >> 12 + rightField := uint32(0xFFF) & uint32(fdf) + return SFlowEnterpriseID(leftField), SFlowFlowRecordType(rightField) +} + +func (fs SFlowFlowSample) GetRecords() []SFlowRecord { + return fs.Records +} + +func (fs SFlowFlowSample) GetType() SFlowSampleType { + return SFlowTypeFlowSample +} + +func skipRecord(data *[]byte) { + recordLength := int(binary.BigEndian.Uint32((*data)[4:])) + *data = (*data)[(recordLength+((4-recordLength)%4))+8:] +} + +func decodeFlowSample(data *[]byte, expanded bool) (SFlowFlowSample, error) { + s := SFlowFlowSample{} + var sdf SFlowDataFormat + *data, sdf = (*data)[4:], SFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + var sdc SFlowDataSource + + s.EnterpriseID, s.Format = sdf.decode() + if len(*data) < 4 { + return SFlowFlowSample{}, errors.New("ethernet counters too small") + } + *data, s.SampleLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowFlowSample{}, errors.New("ethernet counters too small") + } + *data, s.SequenceNumber = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if expanded { + if len(*data) < 4 { + return SFlowFlowSample{}, errors.New("ethernet counters too small") + } + *data, s.SourceIDClass = (*data)[4:], SFlowSourceFormat(binary.BigEndian.Uint32((*data)[:4])) + if len(*data) < 4 { + return SFlowFlowSample{}, errors.New("ethernet counters too small") + } + *data, s.SourceIDIndex = (*data)[4:], SFlowSourceValue(binary.BigEndian.Uint32((*data)[:4])) + } else { + if len(*data) < 4 { + return SFlowFlowSample{}, errors.New("ethernet counters too small") + } + *data, sdc = (*data)[4:], SFlowDataSource(binary.BigEndian.Uint32((*data)[:4])) + s.SourceIDClass, s.SourceIDIndex = sdc.decode() + } + if len(*data) < 4 { + return SFlowFlowSample{}, errors.New("ethernet counters too small") + } + *data, s.SamplingRate = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowFlowSample{}, errors.New("ethernet counters too small") + } + *data, s.SamplePool = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowFlowSample{}, errors.New("ethernet counters too small") + } + *data, s.Dropped = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + + if expanded { + if len(*data) < 4 { + return SFlowFlowSample{}, errors.New("ethernet counters too small") + } + *data, s.InputInterfaceFormat = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowFlowSample{}, errors.New("ethernet counters too small") + } + *data, s.InputInterface = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowFlowSample{}, errors.New("ethernet counters too small") + } + *data, s.OutputInterfaceFormat = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowFlowSample{}, errors.New("ethernet counters too small") + } + *data, s.OutputInterface = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + } else { + if len(*data) < 4 { + return SFlowFlowSample{}, errors.New("ethernet counters too small") + } + *data, s.InputInterface = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowFlowSample{}, errors.New("ethernet counters too small") + } + *data, s.OutputInterface = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + } + if len(*data) < 4 { + return SFlowFlowSample{}, errors.New("ethernet counters too small") + } + *data, s.RecordCount = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + + for i := uint32(0); i < s.RecordCount; i++ { + rdf := SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + enterpriseID, flowRecordType := rdf.decode() + + // Try to decode when EnterpriseID is 0 signaling + // default sflow structs are used according specification + // Unexpected behavior detected for e.g. with pmacct + if enterpriseID == 0 { + switch flowRecordType { + case SFlowTypeRawPacketFlow: + if record, err := decodeRawPacketFlowRecord(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeExtendedUserFlow: + if record, err := decodeExtendedUserFlow(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeExtendedUrlFlow: + if record, err := decodeExtendedURLRecord(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeExtendedSwitchFlow: + if record, err := decodeExtendedSwitchFlowRecord(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeExtendedRouterFlow: + if record, err := decodeExtendedRouterFlowRecord(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeExtendedGatewayFlow: + if record, err := decodeExtendedGatewayFlowRecord(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeEthernetFrameFlow: + if record, err := decodeEthernetFrameFlowRecord(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeIpv4Flow: + if record, err := decodeSFlowIpv4Record(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeIpv6Flow: + if record, err := decodeSFlowIpv6Record(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeExtendedMlpsFlow: + // TODO + skipRecord(data) + return s, errors.New("skipping TypeExtendedMlpsFlow") + case SFlowTypeExtendedNatFlow: + // TODO + skipRecord(data) + return s, errors.New("skipping TypeExtendedNatFlow") + case SFlowTypeExtendedMlpsTunnelFlow: + // TODO + skipRecord(data) + return s, errors.New("skipping TypeExtendedMlpsTunnelFlow") + case SFlowTypeExtendedMlpsVcFlow: + // TODO + skipRecord(data) + return s, errors.New("skipping TypeExtendedMlpsVcFlow") + case SFlowTypeExtendedMlpsFecFlow: + // TODO + skipRecord(data) + return s, errors.New("skipping TypeExtendedMlpsFecFlow") + case SFlowTypeExtendedMlpsLvpFecFlow: + // TODO + skipRecord(data) + return s, errors.New("skipping TypeExtendedMlpsLvpFecFlow") + case SFlowTypeExtendedVlanFlow: + // TODO + skipRecord(data) + return s, errors.New("skipping TypeExtendedVlanFlow") + case SFlowTypeExtendedIpv4TunnelEgressFlow: + if record, err := decodeExtendedIpv4TunnelEgress(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeExtendedIpv4TunnelIngressFlow: + if record, err := decodeExtendedIpv4TunnelIngress(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeExtendedIpv6TunnelEgressFlow: + if record, err := decodeExtendedIpv6TunnelEgress(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeExtendedIpv6TunnelIngressFlow: + if record, err := decodeExtendedIpv6TunnelIngress(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeExtendedDecapsulateEgressFlow: + if record, err := decodeExtendedDecapsulateEgress(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeExtendedDecapsulateIngressFlow: + if record, err := decodeExtendedDecapsulateIngress(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeExtendedVniEgressFlow: + if record, err := decodeExtendedVniEgress(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeExtendedVniIngressFlow: + if record, err := decodeExtendedVniIngress(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + default: + return s, fmt.Errorf("Unsupported flow record type: %d", flowRecordType) + } + } else { + skipRecord(data) + } + } + return s, nil +} + +// Counter samples report information about various counter +// objects. Typically these are items like IfInOctets, or +// CPU / Memory stats, etc. SFlow will report these at regular +// intervals as configured on the agent. If one were sufficiently +// industrious, this could be used to replace the typical +// SNMP polling used for such things. +type SFlowCounterSample struct { + EnterpriseID SFlowEnterpriseID + Format SFlowSampleType + SampleLength uint32 + SequenceNumber uint32 + SourceIDClass SFlowSourceFormat + SourceIDIndex SFlowSourceValue + RecordCount uint32 + Records []SFlowRecord +} + +// Counter samples have the following structure: + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int sample sequence number | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// |id type | src id index value | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | int number of records | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / counter records / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +type SFlowCounterDataFormat uint32 + +func (cdf SFlowCounterDataFormat) decode() (SFlowEnterpriseID, SFlowCounterRecordType) { + leftField := cdf >> 12 + rightField := uint32(0xFFF) & uint32(cdf) + return SFlowEnterpriseID(leftField), SFlowCounterRecordType(rightField) +} + +// GetRecords will return a slice of interface types +// representing records. A type switch can be used to +// get at the underlying SFlowCounterRecordType. +func (cs SFlowCounterSample) GetRecords() []SFlowRecord { + return cs.Records +} + +// GetType will report the type of sample. Only the +// compact form of counter samples is supported +func (cs SFlowCounterSample) GetType() SFlowSampleType { + return SFlowTypeCounterSample +} + +type SFlowCounterRecordType uint32 + +const ( + SFlowTypeGenericInterfaceCounters SFlowCounterRecordType = 1 + SFlowTypeEthernetInterfaceCounters SFlowCounterRecordType = 2 + SFlowTypeTokenRingInterfaceCounters SFlowCounterRecordType = 3 + SFlowType100BaseVGInterfaceCounters SFlowCounterRecordType = 4 + SFlowTypeVLANCounters SFlowCounterRecordType = 5 + SFlowTypeLACPCounters SFlowCounterRecordType = 7 + SFlowTypeProcessorCounters SFlowCounterRecordType = 1001 + SFlowTypeOpenflowPortCounters SFlowCounterRecordType = 1004 + SFlowTypePORTNAMECounters SFlowCounterRecordType = 1005 + SFLowTypeAPPRESOURCESCounters SFlowCounterRecordType = 2203 + SFlowTypeOVSDPCounters SFlowCounterRecordType = 2207 +) + +func (cr SFlowCounterRecordType) String() string { + switch cr { + case SFlowTypeGenericInterfaceCounters: + return "Generic Interface Counters" + case SFlowTypeEthernetInterfaceCounters: + return "Ethernet Interface Counters" + case SFlowTypeTokenRingInterfaceCounters: + return "Token Ring Interface Counters" + case SFlowType100BaseVGInterfaceCounters: + return "100BaseVG Interface Counters" + case SFlowTypeVLANCounters: + return "VLAN Counters" + case SFlowTypeLACPCounters: + return "LACP Counters" + case SFlowTypeProcessorCounters: + return "Processor Counters" + case SFlowTypeOpenflowPortCounters: + return "Openflow Port Counters" + case SFlowTypePORTNAMECounters: + return "PORT NAME Counters" + case SFLowTypeAPPRESOURCESCounters: + return "App Resources Counters" + case SFlowTypeOVSDPCounters: + return "OVSDP Counters" + default: + return "" + + } +} + +func decodeCounterSample(data *[]byte, expanded bool) (SFlowCounterSample, error) { + s := SFlowCounterSample{} + var sdc SFlowDataSource + var sdce SFlowDataSourceExpanded + var sdf SFlowDataFormat + + *data, sdf = (*data)[4:], SFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + s.EnterpriseID, s.Format = sdf.decode() + *data, s.SampleLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, s.SequenceNumber = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if expanded { + *data, sdce = (*data)[8:], SFlowDataSourceExpanded{SFlowSourceFormat(binary.BigEndian.Uint32((*data)[:4])), SFlowSourceValue(binary.BigEndian.Uint32((*data)[4:8]))} + s.SourceIDClass, s.SourceIDIndex = sdce.decode() + } else { + *data, sdc = (*data)[4:], SFlowDataSource(binary.BigEndian.Uint32((*data)[:4])) + s.SourceIDClass, s.SourceIDIndex = sdc.decode() + } + *data, s.RecordCount = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + + for i := uint32(0); i < s.RecordCount; i++ { + cdf := SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) + _, counterRecordType := cdf.decode() + switch counterRecordType { + case SFlowTypeGenericInterfaceCounters: + if record, err := decodeGenericInterfaceCounters(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeEthernetInterfaceCounters: + if record, err := decodeEthernetCounters(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeTokenRingInterfaceCounters: + skipRecord(data) + return s, errors.New("skipping TypeTokenRingInterfaceCounters") + case SFlowType100BaseVGInterfaceCounters: + skipRecord(data) + return s, errors.New("skipping Type100BaseVGInterfaceCounters") + case SFlowTypeVLANCounters: + if record, err := decodeVLANCounters(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeLACPCounters: + if record, err := decodeLACPCounters(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeProcessorCounters: + if record, err := decodeProcessorCounters(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeOpenflowPortCounters: + if record, err := decodeOpenflowportCounters(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypePORTNAMECounters: + if record, err := decodePortnameCounters(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFLowTypeAPPRESOURCESCounters: + if record, err := decodeAppresourcesCounters(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + case SFlowTypeOVSDPCounters: + if record, err := decodeOVSDPCounters(data); err == nil { + s.Records = append(s.Records, record) + } else { + return s, err + } + default: + return s, fmt.Errorf("Invalid counter record type: %d", counterRecordType) + } + } + return s, nil +} + +// SFlowBaseFlowRecord holds the fields common to all records +// of type SFlowFlowRecordType +type SFlowBaseFlowRecord struct { + EnterpriseID SFlowEnterpriseID + Format SFlowFlowRecordType + FlowDataLength uint32 +} + +func (bfr SFlowBaseFlowRecord) GetType() SFlowFlowRecordType { + return bfr.Format +} + +// SFlowFlowRecordType denotes what kind of Flow Record is +// represented. See RFC 3176 +type SFlowFlowRecordType uint32 + +const ( + SFlowTypeRawPacketFlow SFlowFlowRecordType = 1 + SFlowTypeEthernetFrameFlow SFlowFlowRecordType = 2 + SFlowTypeIpv4Flow SFlowFlowRecordType = 3 + SFlowTypeIpv6Flow SFlowFlowRecordType = 4 + SFlowTypeExtendedSwitchFlow SFlowFlowRecordType = 1001 + SFlowTypeExtendedRouterFlow SFlowFlowRecordType = 1002 + SFlowTypeExtendedGatewayFlow SFlowFlowRecordType = 1003 + SFlowTypeExtendedUserFlow SFlowFlowRecordType = 1004 + SFlowTypeExtendedUrlFlow SFlowFlowRecordType = 1005 + SFlowTypeExtendedMlpsFlow SFlowFlowRecordType = 1006 + SFlowTypeExtendedNatFlow SFlowFlowRecordType = 1007 + SFlowTypeExtendedMlpsTunnelFlow SFlowFlowRecordType = 1008 + SFlowTypeExtendedMlpsVcFlow SFlowFlowRecordType = 1009 + SFlowTypeExtendedMlpsFecFlow SFlowFlowRecordType = 1010 + SFlowTypeExtendedMlpsLvpFecFlow SFlowFlowRecordType = 1011 + SFlowTypeExtendedVlanFlow SFlowFlowRecordType = 1012 + SFlowTypeExtendedIpv4TunnelEgressFlow SFlowFlowRecordType = 1023 + SFlowTypeExtendedIpv4TunnelIngressFlow SFlowFlowRecordType = 1024 + SFlowTypeExtendedIpv6TunnelEgressFlow SFlowFlowRecordType = 1025 + SFlowTypeExtendedIpv6TunnelIngressFlow SFlowFlowRecordType = 1026 + SFlowTypeExtendedDecapsulateEgressFlow SFlowFlowRecordType = 1027 + SFlowTypeExtendedDecapsulateIngressFlow SFlowFlowRecordType = 1028 + SFlowTypeExtendedVniEgressFlow SFlowFlowRecordType = 1029 + SFlowTypeExtendedVniIngressFlow SFlowFlowRecordType = 1030 +) + +func (rt SFlowFlowRecordType) String() string { + switch rt { + case SFlowTypeRawPacketFlow: + return "Raw Packet Flow Record" + case SFlowTypeEthernetFrameFlow: + return "Ethernet Frame Flow Record" + case SFlowTypeIpv4Flow: + return "IPv4 Flow Record" + case SFlowTypeIpv6Flow: + return "IPv6 Flow Record" + case SFlowTypeExtendedSwitchFlow: + return "Extended Switch Flow Record" + case SFlowTypeExtendedRouterFlow: + return "Extended Router Flow Record" + case SFlowTypeExtendedGatewayFlow: + return "Extended Gateway Flow Record" + case SFlowTypeExtendedUserFlow: + return "Extended User Flow Record" + case SFlowTypeExtendedUrlFlow: + return "Extended URL Flow Record" + case SFlowTypeExtendedMlpsFlow: + return "Extended MPLS Flow Record" + case SFlowTypeExtendedNatFlow: + return "Extended NAT Flow Record" + case SFlowTypeExtendedMlpsTunnelFlow: + return "Extended MPLS Tunnel Flow Record" + case SFlowTypeExtendedMlpsVcFlow: + return "Extended MPLS VC Flow Record" + case SFlowTypeExtendedMlpsFecFlow: + return "Extended MPLS FEC Flow Record" + case SFlowTypeExtendedMlpsLvpFecFlow: + return "Extended MPLS LVP FEC Flow Record" + case SFlowTypeExtendedVlanFlow: + return "Extended VLAN Flow Record" + case SFlowTypeExtendedIpv4TunnelEgressFlow: + return "Extended IPv4 Tunnel Egress Record" + case SFlowTypeExtendedIpv4TunnelIngressFlow: + return "Extended IPv4 Tunnel Ingress Record" + case SFlowTypeExtendedIpv6TunnelEgressFlow: + return "Extended IPv6 Tunnel Egress Record" + case SFlowTypeExtendedIpv6TunnelIngressFlow: + return "Extended IPv6 Tunnel Ingress Record" + case SFlowTypeExtendedDecapsulateEgressFlow: + return "Extended Decapsulate Egress Record" + case SFlowTypeExtendedDecapsulateIngressFlow: + return "Extended Decapsulate Ingress Record" + case SFlowTypeExtendedVniEgressFlow: + return "Extended VNI Ingress Record" + case SFlowTypeExtendedVniIngressFlow: + return "Extended VNI Ingress Record" + default: + return "" + } +} + +// SFlowRawPacketFlowRecords hold information about a sampled +// packet grabbed as it transited the agent. This is +// perhaps the most useful and interesting record type, +// as it holds the headers of the sampled packet and +// can be used to build up a complete picture of the +// traffic patterns on a network. +// +// The raw packet header is sent back into gopacket for +// decoding, and the resulting gopackt.Packet is stored +// in the Header member +type SFlowRawPacketFlowRecord struct { + SFlowBaseFlowRecord + HeaderProtocol SFlowRawHeaderProtocol + FrameLength uint32 + PayloadRemoved uint32 + HeaderLength uint32 + Header gopacket.Packet +} + +// Raw packet record types have the following structure: + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | record length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Header Protocol | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Frame Length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Payload Removed | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Header Length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// \ Header \ +// \ \ +// \ \ +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +type SFlowRawHeaderProtocol uint32 + +const ( + SFlowProtoEthernet SFlowRawHeaderProtocol = 1 + SFlowProtoISO88024 SFlowRawHeaderProtocol = 2 + SFlowProtoISO88025 SFlowRawHeaderProtocol = 3 + SFlowProtoFDDI SFlowRawHeaderProtocol = 4 + SFlowProtoFrameRelay SFlowRawHeaderProtocol = 5 + SFlowProtoX25 SFlowRawHeaderProtocol = 6 + SFlowProtoPPP SFlowRawHeaderProtocol = 7 + SFlowProtoSMDS SFlowRawHeaderProtocol = 8 + SFlowProtoAAL5 SFlowRawHeaderProtocol = 9 + SFlowProtoAAL5_IP SFlowRawHeaderProtocol = 10 /* e.g. Cisco AAL5 mux */ + SFlowProtoIPv4 SFlowRawHeaderProtocol = 11 + SFlowProtoIPv6 SFlowRawHeaderProtocol = 12 + SFlowProtoMPLS SFlowRawHeaderProtocol = 13 + SFlowProtoPOS SFlowRawHeaderProtocol = 14 /* RFC 1662, 2615 */ +) + +func (sfhp SFlowRawHeaderProtocol) String() string { + switch sfhp { + case SFlowProtoEthernet: + return "ETHERNET-ISO88023" + case SFlowProtoISO88024: + return "ISO88024-TOKENBUS" + case SFlowProtoISO88025: + return "ISO88025-TOKENRING" + case SFlowProtoFDDI: + return "FDDI" + case SFlowProtoFrameRelay: + return "FRAME-RELAY" + case SFlowProtoX25: + return "X25" + case SFlowProtoPPP: + return "PPP" + case SFlowProtoSMDS: + return "SMDS" + case SFlowProtoAAL5: + return "AAL5" + case SFlowProtoAAL5_IP: + return "AAL5-IP" + case SFlowProtoIPv4: + return "IPv4" + case SFlowProtoIPv6: + return "IPv6" + case SFlowProtoMPLS: + return "MPLS" + case SFlowProtoPOS: + return "POS" + } + return "UNKNOWN" +} + +func decodeRawPacketFlowRecord(data *[]byte) (SFlowRawPacketFlowRecord, error) { + rec := SFlowRawPacketFlowRecord{} + header := []byte{} + var fdf SFlowFlowDataFormat + + *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + rec.EnterpriseID, rec.Format = fdf.decode() + *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, rec.HeaderProtocol = (*data)[4:], SFlowRawHeaderProtocol(binary.BigEndian.Uint32((*data)[:4])) + *data, rec.FrameLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, rec.PayloadRemoved = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, rec.HeaderLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + headerLenWithPadding := int(rec.HeaderLength + ((4 - rec.HeaderLength) % 4)) + *data, header = (*data)[headerLenWithPadding:], (*data)[:headerLenWithPadding] + rec.Header = gopacket.NewPacket(header, LayerTypeEthernet, gopacket.Default) + return rec, nil +} + +// SFlowExtendedSwitchFlowRecord give additional information +// about the sampled packet if it's available. It's mainly +// useful for getting at the incoming and outgoing VLANs +// An agent may or may not provide this information. +type SFlowExtendedSwitchFlowRecord struct { + SFlowBaseFlowRecord + IncomingVLAN uint32 + IncomingVLANPriority uint32 + OutgoingVLAN uint32 + OutgoingVLANPriority uint32 +} + +// Extended switch records have the following structure: + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | record length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Incoming VLAN | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Incoming VLAN Priority | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Outgoing VLAN | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Outgoing VLAN Priority | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +func decodeExtendedSwitchFlowRecord(data *[]byte) (SFlowExtendedSwitchFlowRecord, error) { + es := SFlowExtendedSwitchFlowRecord{} + var fdf SFlowFlowDataFormat + + *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + es.EnterpriseID, es.Format = fdf.decode() + *data, es.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, es.IncomingVLAN = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, es.IncomingVLANPriority = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, es.OutgoingVLAN = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, es.OutgoingVLANPriority = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + return es, nil +} + +// SFlowExtendedRouterFlowRecord gives additional information +// about the layer 3 routing information used to forward +// the packet +type SFlowExtendedRouterFlowRecord struct { + SFlowBaseFlowRecord + NextHop net.IP + NextHopSourceMask uint32 + NextHopDestinationMask uint32 +} + +// Extended router records have the following structure: + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | record length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IP version of next hop router (1=v4|2=v6) | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / Next Hop address (v4=4byte|v6=16byte) / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Next Hop Source Mask | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Next Hop Destination Mask | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +func decodeExtendedRouterFlowRecord(data *[]byte) (SFlowExtendedRouterFlowRecord, error) { + er := SFlowExtendedRouterFlowRecord{} + var fdf SFlowFlowDataFormat + var extendedRouterAddressType SFlowIPType + + *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + er.EnterpriseID, er.Format = fdf.decode() + *data, er.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, extendedRouterAddressType = (*data)[4:], SFlowIPType(binary.BigEndian.Uint32((*data)[:4])) + *data, er.NextHop = (*data)[extendedRouterAddressType.Length():], (*data)[:extendedRouterAddressType.Length()] + *data, er.NextHopSourceMask = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, er.NextHopDestinationMask = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + return er, nil +} + +// SFlowExtendedGatewayFlowRecord describes information treasured by +// nework engineers everywhere: AS path information listing which +// BGP peer sent the packet, and various other BGP related info. +// This information is vital because it gives a picture of how much +// traffic is being sent from / received by various BGP peers. + +// Extended gateway records have the following structure: + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | record length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IP version of next hop router (1=v4|2=v6) | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / Next Hop address (v4=4byte|v6=16byte) / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | AS | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Source AS | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Peer AS | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | AS Path Count | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / AS Path / Sequence / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / Communities / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Local Pref | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +// AS Path / Sequence: + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | AS Source Type (Path=1 / Sequence=2) | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Path / Sequence length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / Path / Sequence Members / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +// Communities: + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | communitiy length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / communitiy Members / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +type SFlowExtendedGatewayFlowRecord struct { + SFlowBaseFlowRecord + NextHop net.IP + AS uint32 + SourceAS uint32 + PeerAS uint32 + ASPathCount uint32 + ASPath []SFlowASDestination + Communities []uint32 + LocalPref uint32 +} + +type SFlowASPathType uint32 + +const ( + SFlowASSet SFlowASPathType = 1 + SFlowASSequence SFlowASPathType = 2 +) + +func (apt SFlowASPathType) String() string { + switch apt { + case SFlowASSet: + return "AS Set" + case SFlowASSequence: + return "AS Sequence" + default: + return "" + } +} + +type SFlowASDestination struct { + Type SFlowASPathType + Count uint32 + Members []uint32 +} + +func (asd SFlowASDestination) String() string { + switch asd.Type { + case SFlowASSet: + return fmt.Sprint("AS Set:", asd.Members) + case SFlowASSequence: + return fmt.Sprint("AS Sequence:", asd.Members) + default: + return "" + } +} + +func (ad *SFlowASDestination) decodePath(data *[]byte) { + *data, ad.Type = (*data)[4:], SFlowASPathType(binary.BigEndian.Uint32((*data)[:4])) + *data, ad.Count = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + ad.Members = make([]uint32, ad.Count) + for i := uint32(0); i < ad.Count; i++ { + var member uint32 + *data, member = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + ad.Members[i] = member + } +} + +func decodeExtendedGatewayFlowRecord(data *[]byte) (SFlowExtendedGatewayFlowRecord, error) { + eg := SFlowExtendedGatewayFlowRecord{} + var fdf SFlowFlowDataFormat + var extendedGatewayAddressType SFlowIPType + var communitiesLength uint32 + var community uint32 + + *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + eg.EnterpriseID, eg.Format = fdf.decode() + *data, eg.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, extendedGatewayAddressType = (*data)[4:], SFlowIPType(binary.BigEndian.Uint32((*data)[:4])) + *data, eg.NextHop = (*data)[extendedGatewayAddressType.Length():], (*data)[:extendedGatewayAddressType.Length()] + *data, eg.AS = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, eg.SourceAS = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, eg.PeerAS = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, eg.ASPathCount = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + for i := uint32(0); i < eg.ASPathCount; i++ { + asPath := SFlowASDestination{} + asPath.decodePath(data) + eg.ASPath = append(eg.ASPath, asPath) + } + *data, communitiesLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + eg.Communities = make([]uint32, communitiesLength) + for j := uint32(0); j < communitiesLength; j++ { + *data, community = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + eg.Communities[j] = community + } + *data, eg.LocalPref = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + return eg, nil +} + +// ************************************************** +// Extended URL Flow Record +// ************************************************** + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | record length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | direction | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | URL | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Host | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +type SFlowURLDirection uint32 + +const ( + SFlowURLsrc SFlowURLDirection = 1 + SFlowURLdst SFlowURLDirection = 2 +) + +func (urld SFlowURLDirection) String() string { + switch urld { + case SFlowURLsrc: + return "Source address is the server" + case SFlowURLdst: + return "Destination address is the server" + default: + return "" + } +} + +type SFlowExtendedURLRecord struct { + SFlowBaseFlowRecord + Direction SFlowURLDirection + URL string + Host string +} + +func decodeExtendedURLRecord(data *[]byte) (SFlowExtendedURLRecord, error) { + eur := SFlowExtendedURLRecord{} + var fdf SFlowFlowDataFormat + var urlLen uint32 + var urlLenWithPad int + var hostLen uint32 + var hostLenWithPad int + var urlBytes []byte + var hostBytes []byte + + *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + eur.EnterpriseID, eur.Format = fdf.decode() + *data, eur.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, eur.Direction = (*data)[4:], SFlowURLDirection(binary.BigEndian.Uint32((*data)[:4])) + *data, urlLen = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + urlLenWithPad = int(urlLen + ((4 - urlLen) % 4)) + *data, urlBytes = (*data)[urlLenWithPad:], (*data)[:urlLenWithPad] + eur.URL = string(urlBytes[:urlLen]) + *data, hostLen = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + hostLenWithPad = int(hostLen + ((4 - hostLen) % 4)) + *data, hostBytes = (*data)[hostLenWithPad:], (*data)[:hostLenWithPad] + eur.Host = string(hostBytes[:hostLen]) + return eur, nil +} + +// ************************************************** +// Extended User Flow Record +// ************************************************** + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | record length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Source Character Set | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Source User Id | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Destination Character Set | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Destination User ID | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +type SFlowExtendedUserFlow struct { + SFlowBaseFlowRecord + SourceCharSet SFlowCharSet + SourceUserID string + DestinationCharSet SFlowCharSet + DestinationUserID string +} + +type SFlowCharSet uint32 + +const ( + SFlowCSunknown SFlowCharSet = 2 + SFlowCSASCII SFlowCharSet = 3 + SFlowCSISOLatin1 SFlowCharSet = 4 + SFlowCSISOLatin2 SFlowCharSet = 5 + SFlowCSISOLatin3 SFlowCharSet = 6 + SFlowCSISOLatin4 SFlowCharSet = 7 + SFlowCSISOLatinCyrillic SFlowCharSet = 8 + SFlowCSISOLatinArabic SFlowCharSet = 9 + SFlowCSISOLatinGreek SFlowCharSet = 10 + SFlowCSISOLatinHebrew SFlowCharSet = 11 + SFlowCSISOLatin5 SFlowCharSet = 12 + SFlowCSISOLatin6 SFlowCharSet = 13 + SFlowCSISOTextComm SFlowCharSet = 14 + SFlowCSHalfWidthKatakana SFlowCharSet = 15 + SFlowCSJISEncoding SFlowCharSet = 16 + SFlowCSShiftJIS SFlowCharSet = 17 + SFlowCSEUCPkdFmtJapanese SFlowCharSet = 18 + SFlowCSEUCFixWidJapanese SFlowCharSet = 19 + SFlowCSISO4UnitedKingdom SFlowCharSet = 20 + SFlowCSISO11SwedishForNames SFlowCharSet = 21 + SFlowCSISO15Italian SFlowCharSet = 22 + SFlowCSISO17Spanish SFlowCharSet = 23 + SFlowCSISO21German SFlowCharSet = 24 + SFlowCSISO60DanishNorwegian SFlowCharSet = 25 + SFlowCSISO69French SFlowCharSet = 26 + SFlowCSISO10646UTF1 SFlowCharSet = 27 + SFlowCSISO646basic1983 SFlowCharSet = 28 + SFlowCSINVARIANT SFlowCharSet = 29 + SFlowCSISO2IntlRefVersion SFlowCharSet = 30 + SFlowCSNATSSEFI SFlowCharSet = 31 + SFlowCSNATSSEFIADD SFlowCharSet = 32 + SFlowCSNATSDANO SFlowCharSet = 33 + SFlowCSNATSDANOADD SFlowCharSet = 34 + SFlowCSISO10Swedish SFlowCharSet = 35 + SFlowCSKSC56011987 SFlowCharSet = 36 + SFlowCSISO2022KR SFlowCharSet = 37 + SFlowCSEUCKR SFlowCharSet = 38 + SFlowCSISO2022JP SFlowCharSet = 39 + SFlowCSISO2022JP2 SFlowCharSet = 40 + SFlowCSISO13JISC6220jp SFlowCharSet = 41 + SFlowCSISO14JISC6220ro SFlowCharSet = 42 + SFlowCSISO16Portuguese SFlowCharSet = 43 + SFlowCSISO18Greek7Old SFlowCharSet = 44 + SFlowCSISO19LatinGreek SFlowCharSet = 45 + SFlowCSISO25French SFlowCharSet = 46 + SFlowCSISO27LatinGreek1 SFlowCharSet = 47 + SFlowCSISO5427Cyrillic SFlowCharSet = 48 + SFlowCSISO42JISC62261978 SFlowCharSet = 49 + SFlowCSISO47BSViewdata SFlowCharSet = 50 + SFlowCSISO49INIS SFlowCharSet = 51 + SFlowCSISO50INIS8 SFlowCharSet = 52 + SFlowCSISO51INISCyrillic SFlowCharSet = 53 + SFlowCSISO54271981 SFlowCharSet = 54 + SFlowCSISO5428Greek SFlowCharSet = 55 + SFlowCSISO57GB1988 SFlowCharSet = 56 + SFlowCSISO58GB231280 SFlowCharSet = 57 + SFlowCSISO61Norwegian2 SFlowCharSet = 58 + SFlowCSISO70VideotexSupp1 SFlowCharSet = 59 + SFlowCSISO84Portuguese2 SFlowCharSet = 60 + SFlowCSISO85Spanish2 SFlowCharSet = 61 + SFlowCSISO86Hungarian SFlowCharSet = 62 + SFlowCSISO87JISX0208 SFlowCharSet = 63 + SFlowCSISO88Greek7 SFlowCharSet = 64 + SFlowCSISO89ASMO449 SFlowCharSet = 65 + SFlowCSISO90 SFlowCharSet = 66 + SFlowCSISO91JISC62291984a SFlowCharSet = 67 + SFlowCSISO92JISC62991984b SFlowCharSet = 68 + SFlowCSISO93JIS62291984badd SFlowCharSet = 69 + SFlowCSISO94JIS62291984hand SFlowCharSet = 70 + SFlowCSISO95JIS62291984handadd SFlowCharSet = 71 + SFlowCSISO96JISC62291984kana SFlowCharSet = 72 + SFlowCSISO2033 SFlowCharSet = 73 + SFlowCSISO99NAPLPS SFlowCharSet = 74 + SFlowCSISO102T617bit SFlowCharSet = 75 + SFlowCSISO103T618bit SFlowCharSet = 76 + SFlowCSISO111ECMACyrillic SFlowCharSet = 77 + SFlowCSa71 SFlowCharSet = 78 + SFlowCSa72 SFlowCharSet = 79 + SFlowCSISO123CSAZ24341985gr SFlowCharSet = 80 + SFlowCSISO88596E SFlowCharSet = 81 + SFlowCSISO88596I SFlowCharSet = 82 + SFlowCSISO128T101G2 SFlowCharSet = 83 + SFlowCSISO88598E SFlowCharSet = 84 + SFlowCSISO88598I SFlowCharSet = 85 + SFlowCSISO139CSN369103 SFlowCharSet = 86 + SFlowCSISO141JUSIB1002 SFlowCharSet = 87 + SFlowCSISO143IECP271 SFlowCharSet = 88 + SFlowCSISO146Serbian SFlowCharSet = 89 + SFlowCSISO147Macedonian SFlowCharSet = 90 + SFlowCSISO150 SFlowCharSet = 91 + SFlowCSISO151Cuba SFlowCharSet = 92 + SFlowCSISO6937Add SFlowCharSet = 93 + SFlowCSISO153GOST1976874 SFlowCharSet = 94 + SFlowCSISO8859Supp SFlowCharSet = 95 + SFlowCSISO10367Box SFlowCharSet = 96 + SFlowCSISO158Lap SFlowCharSet = 97 + SFlowCSISO159JISX02121990 SFlowCharSet = 98 + SFlowCSISO646Danish SFlowCharSet = 99 + SFlowCSUSDK SFlowCharSet = 100 + SFlowCSDKUS SFlowCharSet = 101 + SFlowCSKSC5636 SFlowCharSet = 102 + SFlowCSUnicode11UTF7 SFlowCharSet = 103 + SFlowCSISO2022CN SFlowCharSet = 104 + SFlowCSISO2022CNEXT SFlowCharSet = 105 + SFlowCSUTF8 SFlowCharSet = 106 + SFlowCSISO885913 SFlowCharSet = 109 + SFlowCSISO885914 SFlowCharSet = 110 + SFlowCSISO885915 SFlowCharSet = 111 + SFlowCSISO885916 SFlowCharSet = 112 + SFlowCSGBK SFlowCharSet = 113 + SFlowCSGB18030 SFlowCharSet = 114 + SFlowCSOSDEBCDICDF0415 SFlowCharSet = 115 + SFlowCSOSDEBCDICDF03IRV SFlowCharSet = 116 + SFlowCSOSDEBCDICDF041 SFlowCharSet = 117 + SFlowCSISO115481 SFlowCharSet = 118 + SFlowCSKZ1048 SFlowCharSet = 119 + SFlowCSUnicode SFlowCharSet = 1000 + SFlowCSUCS4 SFlowCharSet = 1001 + SFlowCSUnicodeASCII SFlowCharSet = 1002 + SFlowCSUnicodeLatin1 SFlowCharSet = 1003 + SFlowCSUnicodeJapanese SFlowCharSet = 1004 + SFlowCSUnicodeIBM1261 SFlowCharSet = 1005 + SFlowCSUnicodeIBM1268 SFlowCharSet = 1006 + SFlowCSUnicodeIBM1276 SFlowCharSet = 1007 + SFlowCSUnicodeIBM1264 SFlowCharSet = 1008 + SFlowCSUnicodeIBM1265 SFlowCharSet = 1009 + SFlowCSUnicode11 SFlowCharSet = 1010 + SFlowCSSCSU SFlowCharSet = 1011 + SFlowCSUTF7 SFlowCharSet = 1012 + SFlowCSUTF16BE SFlowCharSet = 1013 + SFlowCSUTF16LE SFlowCharSet = 1014 + SFlowCSUTF16 SFlowCharSet = 1015 + SFlowCSCESU8 SFlowCharSet = 1016 + SFlowCSUTF32 SFlowCharSet = 1017 + SFlowCSUTF32BE SFlowCharSet = 1018 + SFlowCSUTF32LE SFlowCharSet = 1019 + SFlowCSBOCU1 SFlowCharSet = 1020 + SFlowCSWindows30Latin1 SFlowCharSet = 2000 + SFlowCSWindows31Latin1 SFlowCharSet = 2001 + SFlowCSWindows31Latin2 SFlowCharSet = 2002 + SFlowCSWindows31Latin5 SFlowCharSet = 2003 + SFlowCSHPRoman8 SFlowCharSet = 2004 + SFlowCSAdobeStandardEncoding SFlowCharSet = 2005 + SFlowCSVenturaUS SFlowCharSet = 2006 + SFlowCSVenturaInternational SFlowCharSet = 2007 + SFlowCSDECMCS SFlowCharSet = 2008 + SFlowCSPC850Multilingual SFlowCharSet = 2009 + SFlowCSPCp852 SFlowCharSet = 2010 + SFlowCSPC8CodePage437 SFlowCharSet = 2011 + SFlowCSPC8DanishNorwegian SFlowCharSet = 2012 + SFlowCSPC862LatinHebrew SFlowCharSet = 2013 + SFlowCSPC8Turkish SFlowCharSet = 2014 + SFlowCSIBMSymbols SFlowCharSet = 2015 + SFlowCSIBMThai SFlowCharSet = 2016 + SFlowCSHPLegal SFlowCharSet = 2017 + SFlowCSHPPiFont SFlowCharSet = 2018 + SFlowCSHPMath8 SFlowCharSet = 2019 + SFlowCSHPPSMath SFlowCharSet = 2020 + SFlowCSHPDesktop SFlowCharSet = 2021 + SFlowCSVenturaMath SFlowCharSet = 2022 + SFlowCSMicrosoftPublishing SFlowCharSet = 2023 + SFlowCSWindows31J SFlowCharSet = 2024 + SFlowCSGB2312 SFlowCharSet = 2025 + SFlowCSBig5 SFlowCharSet = 2026 + SFlowCSMacintosh SFlowCharSet = 2027 + SFlowCSIBM037 SFlowCharSet = 2028 + SFlowCSIBM038 SFlowCharSet = 2029 + SFlowCSIBM273 SFlowCharSet = 2030 + SFlowCSIBM274 SFlowCharSet = 2031 + SFlowCSIBM275 SFlowCharSet = 2032 + SFlowCSIBM277 SFlowCharSet = 2033 + SFlowCSIBM278 SFlowCharSet = 2034 + SFlowCSIBM280 SFlowCharSet = 2035 + SFlowCSIBM281 SFlowCharSet = 2036 + SFlowCSIBM284 SFlowCharSet = 2037 + SFlowCSIBM285 SFlowCharSet = 2038 + SFlowCSIBM290 SFlowCharSet = 2039 + SFlowCSIBM297 SFlowCharSet = 2040 + SFlowCSIBM420 SFlowCharSet = 2041 + SFlowCSIBM423 SFlowCharSet = 2042 + SFlowCSIBM424 SFlowCharSet = 2043 + SFlowCSIBM500 SFlowCharSet = 2044 + SFlowCSIBM851 SFlowCharSet = 2045 + SFlowCSIBM855 SFlowCharSet = 2046 + SFlowCSIBM857 SFlowCharSet = 2047 + SFlowCSIBM860 SFlowCharSet = 2048 + SFlowCSIBM861 SFlowCharSet = 2049 + SFlowCSIBM863 SFlowCharSet = 2050 + SFlowCSIBM864 SFlowCharSet = 2051 + SFlowCSIBM865 SFlowCharSet = 2052 + SFlowCSIBM868 SFlowCharSet = 2053 + SFlowCSIBM869 SFlowCharSet = 2054 + SFlowCSIBM870 SFlowCharSet = 2055 + SFlowCSIBM871 SFlowCharSet = 2056 + SFlowCSIBM880 SFlowCharSet = 2057 + SFlowCSIBM891 SFlowCharSet = 2058 + SFlowCSIBM903 SFlowCharSet = 2059 + SFlowCSIBBM904 SFlowCharSet = 2060 + SFlowCSIBM905 SFlowCharSet = 2061 + SFlowCSIBM918 SFlowCharSet = 2062 + SFlowCSIBM1026 SFlowCharSet = 2063 + SFlowCSIBMEBCDICATDE SFlowCharSet = 2064 + SFlowCSEBCDICATDEA SFlowCharSet = 2065 + SFlowCSEBCDICCAFR SFlowCharSet = 2066 + SFlowCSEBCDICDKNO SFlowCharSet = 2067 + SFlowCSEBCDICDKNOA SFlowCharSet = 2068 + SFlowCSEBCDICFISE SFlowCharSet = 2069 + SFlowCSEBCDICFISEA SFlowCharSet = 2070 + SFlowCSEBCDICFR SFlowCharSet = 2071 + SFlowCSEBCDICIT SFlowCharSet = 2072 + SFlowCSEBCDICPT SFlowCharSet = 2073 + SFlowCSEBCDICES SFlowCharSet = 2074 + SFlowCSEBCDICESA SFlowCharSet = 2075 + SFlowCSEBCDICESS SFlowCharSet = 2076 + SFlowCSEBCDICUK SFlowCharSet = 2077 + SFlowCSEBCDICUS SFlowCharSet = 2078 + SFlowCSUnknown8BiT SFlowCharSet = 2079 + SFlowCSMnemonic SFlowCharSet = 2080 + SFlowCSMnem SFlowCharSet = 2081 + SFlowCSVISCII SFlowCharSet = 2082 + SFlowCSVIQR SFlowCharSet = 2083 + SFlowCSKOI8R SFlowCharSet = 2084 + SFlowCSHZGB2312 SFlowCharSet = 2085 + SFlowCSIBM866 SFlowCharSet = 2086 + SFlowCSPC775Baltic SFlowCharSet = 2087 + SFlowCSKOI8U SFlowCharSet = 2088 + SFlowCSIBM00858 SFlowCharSet = 2089 + SFlowCSIBM00924 SFlowCharSet = 2090 + SFlowCSIBM01140 SFlowCharSet = 2091 + SFlowCSIBM01141 SFlowCharSet = 2092 + SFlowCSIBM01142 SFlowCharSet = 2093 + SFlowCSIBM01143 SFlowCharSet = 2094 + SFlowCSIBM01144 SFlowCharSet = 2095 + SFlowCSIBM01145 SFlowCharSet = 2096 + SFlowCSIBM01146 SFlowCharSet = 2097 + SFlowCSIBM01147 SFlowCharSet = 2098 + SFlowCSIBM01148 SFlowCharSet = 2099 + SFlowCSIBM01149 SFlowCharSet = 2100 + SFlowCSBig5HKSCS SFlowCharSet = 2101 + SFlowCSIBM1047 SFlowCharSet = 2102 + SFlowCSPTCP154 SFlowCharSet = 2103 + SFlowCSAmiga1251 SFlowCharSet = 2104 + SFlowCSKOI7switched SFlowCharSet = 2105 + SFlowCSBRF SFlowCharSet = 2106 + SFlowCSTSCII SFlowCharSet = 2107 + SFlowCSCP51932 SFlowCharSet = 2108 + SFlowCSWindows874 SFlowCharSet = 2109 + SFlowCSWindows1250 SFlowCharSet = 2250 + SFlowCSWindows1251 SFlowCharSet = 2251 + SFlowCSWindows1252 SFlowCharSet = 2252 + SFlowCSWindows1253 SFlowCharSet = 2253 + SFlowCSWindows1254 SFlowCharSet = 2254 + SFlowCSWindows1255 SFlowCharSet = 2255 + SFlowCSWindows1256 SFlowCharSet = 2256 + SFlowCSWindows1257 SFlowCharSet = 2257 + SFlowCSWindows1258 SFlowCharSet = 2258 + SFlowCSTIS620 SFlowCharSet = 2259 + SFlowCS50220 SFlowCharSet = 2260 + SFlowCSreserved SFlowCharSet = 3000 +) + +func decodeExtendedUserFlow(data *[]byte) (SFlowExtendedUserFlow, error) { + eu := SFlowExtendedUserFlow{} + var fdf SFlowFlowDataFormat + var srcUserLen uint32 + var srcUserLenWithPad int + var srcUserBytes []byte + var dstUserLen uint32 + var dstUserLenWithPad int + var dstUserBytes []byte + + *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + eu.EnterpriseID, eu.Format = fdf.decode() + *data, eu.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, eu.SourceCharSet = (*data)[4:], SFlowCharSet(binary.BigEndian.Uint32((*data)[:4])) + *data, srcUserLen = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + srcUserLenWithPad = int(srcUserLen + ((4 - srcUserLen) % 4)) + *data, srcUserBytes = (*data)[srcUserLenWithPad:], (*data)[:srcUserLenWithPad] + eu.SourceUserID = string(srcUserBytes[:srcUserLen]) + *data, eu.DestinationCharSet = (*data)[4:], SFlowCharSet(binary.BigEndian.Uint32((*data)[:4])) + *data, dstUserLen = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + dstUserLenWithPad = int(dstUserLen + ((4 - dstUserLen) % 4)) + *data, dstUserBytes = (*data)[dstUserLenWithPad:], (*data)[:dstUserLenWithPad] + eu.DestinationUserID = string(dstUserBytes[:dstUserLen]) + return eu, nil +} + +// ************************************************** +// Packet IP version 4 Record +// ************************************************** + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Protocol | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Source IPv4 | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Destination IPv4 | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Source Port | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Destionation Port | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | TCP Flags | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | TOS | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +type SFlowIpv4Record struct { + // The length of the IP packet excluding ower layer encapsulations + Length uint32 + // IP Protocol type (for example, TCP = 6, UDP = 17) + Protocol uint32 + // Source IP Address + IPSrc net.IP + // Destination IP Address + IPDst net.IP + // TCP/UDP source port number or equivalent + PortSrc uint32 + // TCP/UDP destination port number or equivalent + PortDst uint32 + // TCP flags + TCPFlags uint32 + // IP type of service + TOS uint32 +} + +func decodeSFlowIpv4Record(data *[]byte) (SFlowIpv4Record, error) { + si := SFlowIpv4Record{} + + *data, si.Length = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, si.Protocol = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, si.IPSrc = (*data)[4:], net.IP((*data)[:4]) + *data, si.IPDst = (*data)[4:], net.IP((*data)[:4]) + *data, si.PortSrc = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, si.PortDst = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, si.TCPFlags = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, si.TOS = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + + return si, nil +} + +// ************************************************** +// Packet IP version 6 Record +// ************************************************** + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Protocol | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Source IPv4 | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Destination IPv4 | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Source Port | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Destionation Port | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | TCP Flags | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Priority | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +type SFlowIpv6Record struct { + // The length of the IP packet excluding ower layer encapsulations + Length uint32 + // IP Protocol type (for example, TCP = 6, UDP = 17) + Protocol uint32 + // Source IP Address + IPSrc net.IP + // Destination IP Address + IPDst net.IP + // TCP/UDP source port number or equivalent + PortSrc uint32 + // TCP/UDP destination port number or equivalent + PortDst uint32 + // TCP flags + TCPFlags uint32 + // IP priority + Priority uint32 +} + +func decodeSFlowIpv6Record(data *[]byte) (SFlowIpv6Record, error) { + si := SFlowIpv6Record{} + + *data, si.Length = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, si.Protocol = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, si.IPSrc = (*data)[16:], net.IP((*data)[:16]) + *data, si.IPDst = (*data)[16:], net.IP((*data)[:16]) + *data, si.PortSrc = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, si.PortDst = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, si.TCPFlags = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, si.Priority = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + + return si, nil +} + +// ************************************************** +// Extended IPv4 Tunnel Egress +// ************************************************** + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | record length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / Packet IP version 4 Record / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +type SFlowExtendedIpv4TunnelEgressRecord struct { + SFlowBaseFlowRecord + SFlowIpv4Record SFlowIpv4Record +} + +func decodeExtendedIpv4TunnelEgress(data *[]byte) (SFlowExtendedIpv4TunnelEgressRecord, error) { + rec := SFlowExtendedIpv4TunnelEgressRecord{} + var fdf SFlowFlowDataFormat + + *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + rec.EnterpriseID, rec.Format = fdf.decode() + *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + rec.SFlowIpv4Record, _ = decodeSFlowIpv4Record(data) + + return rec, nil +} + +// ************************************************** +// Extended IPv4 Tunnel Ingress +// ************************************************** + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | record length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / Packet IP version 4 Record / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +type SFlowExtendedIpv4TunnelIngressRecord struct { + SFlowBaseFlowRecord + SFlowIpv4Record SFlowIpv4Record +} + +func decodeExtendedIpv4TunnelIngress(data *[]byte) (SFlowExtendedIpv4TunnelIngressRecord, error) { + rec := SFlowExtendedIpv4TunnelIngressRecord{} + var fdf SFlowFlowDataFormat + + *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + rec.EnterpriseID, rec.Format = fdf.decode() + *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + rec.SFlowIpv4Record, _ = decodeSFlowIpv4Record(data) + + return rec, nil +} + +// ************************************************** +// Extended IPv6 Tunnel Egress +// ************************************************** + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | record length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / Packet IP version 6 Record / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +type SFlowExtendedIpv6TunnelEgressRecord struct { + SFlowBaseFlowRecord + SFlowIpv6Record +} + +func decodeExtendedIpv6TunnelEgress(data *[]byte) (SFlowExtendedIpv6TunnelEgressRecord, error) { + rec := SFlowExtendedIpv6TunnelEgressRecord{} + var fdf SFlowFlowDataFormat + + *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + rec.EnterpriseID, rec.Format = fdf.decode() + *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + rec.SFlowIpv6Record, _ = decodeSFlowIpv6Record(data) + + return rec, nil +} + +// ************************************************** +// Extended IPv6 Tunnel Ingress +// ************************************************** + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | record length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / Packet IP version 6 Record / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +type SFlowExtendedIpv6TunnelIngressRecord struct { + SFlowBaseFlowRecord + SFlowIpv6Record +} + +func decodeExtendedIpv6TunnelIngress(data *[]byte) (SFlowExtendedIpv6TunnelIngressRecord, error) { + rec := SFlowExtendedIpv6TunnelIngressRecord{} + var fdf SFlowFlowDataFormat + + *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + rec.EnterpriseID, rec.Format = fdf.decode() + *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + rec.SFlowIpv6Record, _ = decodeSFlowIpv6Record(data) + + return rec, nil +} + +// ************************************************** +// Extended Decapsulate Egress +// ************************************************** + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | record length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Inner Header Offset | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +type SFlowExtendedDecapsulateEgressRecord struct { + SFlowBaseFlowRecord + InnerHeaderOffset uint32 +} + +func decodeExtendedDecapsulateEgress(data *[]byte) (SFlowExtendedDecapsulateEgressRecord, error) { + rec := SFlowExtendedDecapsulateEgressRecord{} + var fdf SFlowFlowDataFormat + + *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + rec.EnterpriseID, rec.Format = fdf.decode() + *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, rec.InnerHeaderOffset = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + + return rec, nil +} + +// ************************************************** +// Extended Decapsulate Ingress +// ************************************************** + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | record length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Inner Header Offset | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +type SFlowExtendedDecapsulateIngressRecord struct { + SFlowBaseFlowRecord + InnerHeaderOffset uint32 +} + +func decodeExtendedDecapsulateIngress(data *[]byte) (SFlowExtendedDecapsulateIngressRecord, error) { + rec := SFlowExtendedDecapsulateIngressRecord{} + var fdf SFlowFlowDataFormat + + *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + rec.EnterpriseID, rec.Format = fdf.decode() + *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, rec.InnerHeaderOffset = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + + return rec, nil +} + +// ************************************************** +// Extended VNI Egress +// ************************************************** + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | record length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | VNI | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +type SFlowExtendedVniEgressRecord struct { + SFlowBaseFlowRecord + VNI uint32 +} + +func decodeExtendedVniEgress(data *[]byte) (SFlowExtendedVniEgressRecord, error) { + rec := SFlowExtendedVniEgressRecord{} + var fdf SFlowFlowDataFormat + + *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + rec.EnterpriseID, rec.Format = fdf.decode() + *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, rec.VNI = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + + return rec, nil +} + +// ************************************************** +// Extended VNI Ingress +// ************************************************** + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | record length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | VNI | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +type SFlowExtendedVniIngressRecord struct { + SFlowBaseFlowRecord + VNI uint32 +} + +func decodeExtendedVniIngress(data *[]byte) (SFlowExtendedVniIngressRecord, error) { + rec := SFlowExtendedVniIngressRecord{} + var fdf SFlowFlowDataFormat + + *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + rec.EnterpriseID, rec.Format = fdf.decode() + *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, rec.VNI = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + + return rec, nil +} + +// ************************************************** +// Counter Record +// ************************************************** + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | counter length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / counter data / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +type SFlowBaseCounterRecord struct { + EnterpriseID SFlowEnterpriseID + Format SFlowCounterRecordType + FlowDataLength uint32 +} + +func (bcr SFlowBaseCounterRecord) GetType() SFlowCounterRecordType { + switch bcr.Format { + case SFlowTypeGenericInterfaceCounters: + return SFlowTypeGenericInterfaceCounters + case SFlowTypeEthernetInterfaceCounters: + return SFlowTypeEthernetInterfaceCounters + case SFlowTypeTokenRingInterfaceCounters: + return SFlowTypeTokenRingInterfaceCounters + case SFlowType100BaseVGInterfaceCounters: + return SFlowType100BaseVGInterfaceCounters + case SFlowTypeVLANCounters: + return SFlowTypeVLANCounters + case SFlowTypeLACPCounters: + return SFlowTypeLACPCounters + case SFlowTypeProcessorCounters: + return SFlowTypeProcessorCounters + case SFlowTypeOpenflowPortCounters: + return SFlowTypeOpenflowPortCounters + case SFlowTypePORTNAMECounters: + return SFlowTypePORTNAMECounters + case SFLowTypeAPPRESOURCESCounters: + return SFLowTypeAPPRESOURCESCounters + case SFlowTypeOVSDPCounters: + return SFlowTypeOVSDPCounters + } + unrecognized := fmt.Sprint("Unrecognized counter record type:", bcr.Format) + panic(unrecognized) +} + +// ************************************************** +// Counter Record +// ************************************************** + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | counter length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfIndex | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfType | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfSpeed | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfDirection | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfStatus | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IFInOctets | +// | | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfInUcastPkts | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfInMulticastPkts | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfInBroadcastPkts | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfInDiscards | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | InInErrors | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfInUnknownProtos | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfOutOctets | +// | | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfOutUcastPkts | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfOutMulticastPkts | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfOutBroadcastPkts | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfOutDiscards | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfOUtErrors | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | IfPromiscouousMode | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +type SFlowGenericInterfaceCounters struct { + SFlowBaseCounterRecord + IfIndex uint32 + IfType uint32 + IfSpeed uint64 + IfDirection uint32 + IfStatus uint32 + IfInOctets uint64 + IfInUcastPkts uint32 + IfInMulticastPkts uint32 + IfInBroadcastPkts uint32 + IfInDiscards uint32 + IfInErrors uint32 + IfInUnknownProtos uint32 + IfOutOctets uint64 + IfOutUcastPkts uint32 + IfOutMulticastPkts uint32 + IfOutBroadcastPkts uint32 + IfOutDiscards uint32 + IfOutErrors uint32 + IfPromiscuousMode uint32 +} + +func decodeGenericInterfaceCounters(data *[]byte) (SFlowGenericInterfaceCounters, error) { + gic := SFlowGenericInterfaceCounters{} + var cdf SFlowCounterDataFormat + + *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) + gic.EnterpriseID, gic.Format = cdf.decode() + *data, gic.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfIndex = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfType = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfSpeed = (*data)[8:], binary.BigEndian.Uint64((*data)[:8]) + *data, gic.IfDirection = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfStatus = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfInOctets = (*data)[8:], binary.BigEndian.Uint64((*data)[:8]) + *data, gic.IfInUcastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfInMulticastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfInBroadcastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfInDiscards = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfInErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfInUnknownProtos = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfOutOctets = (*data)[8:], binary.BigEndian.Uint64((*data)[:8]) + *data, gic.IfOutUcastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfOutMulticastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfOutBroadcastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfOutDiscards = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfOutErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, gic.IfPromiscuousMode = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + return gic, nil +} + +// ************************************************** +// Counter Record +// ************************************************** + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | counter length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// / counter data / +// / / +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +type SFlowEthernetCounters struct { + SFlowBaseCounterRecord + AlignmentErrors uint32 + FCSErrors uint32 + SingleCollisionFrames uint32 + MultipleCollisionFrames uint32 + SQETestErrors uint32 + DeferredTransmissions uint32 + LateCollisions uint32 + ExcessiveCollisions uint32 + InternalMacTransmitErrors uint32 + CarrierSenseErrors uint32 + FrameTooLongs uint32 + InternalMacReceiveErrors uint32 + SymbolErrors uint32 +} + +func decodeEthernetCounters(data *[]byte) (SFlowEthernetCounters, error) { + ec := SFlowEthernetCounters{} + var cdf SFlowCounterDataFormat + + *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) + ec.EnterpriseID, ec.Format = cdf.decode() + if len(*data) < 4 { + return SFlowEthernetCounters{}, errors.New("ethernet counters too small") + } + *data, ec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowEthernetCounters{}, errors.New("ethernet counters too small") + } + *data, ec.AlignmentErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowEthernetCounters{}, errors.New("ethernet counters too small") + } + *data, ec.FCSErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowEthernetCounters{}, errors.New("ethernet counters too small") + } + *data, ec.SingleCollisionFrames = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowEthernetCounters{}, errors.New("ethernet counters too small") + } + *data, ec.MultipleCollisionFrames = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowEthernetCounters{}, errors.New("ethernet counters too small") + } + *data, ec.SQETestErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowEthernetCounters{}, errors.New("ethernet counters too small") + } + *data, ec.DeferredTransmissions = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowEthernetCounters{}, errors.New("ethernet counters too small") + } + *data, ec.LateCollisions = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowEthernetCounters{}, errors.New("ethernet counters too small") + } + *data, ec.ExcessiveCollisions = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowEthernetCounters{}, errors.New("ethernet counters too small") + } + *data, ec.InternalMacTransmitErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowEthernetCounters{}, errors.New("ethernet counters too small") + } + *data, ec.CarrierSenseErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowEthernetCounters{}, errors.New("ethernet counters too small") + } + *data, ec.FrameTooLongs = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowEthernetCounters{}, errors.New("ethernet counters too small") + } + *data, ec.InternalMacReceiveErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + if len(*data) < 4 { + return SFlowEthernetCounters{}, errors.New("ethernet counters too small") + } + *data, ec.SymbolErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + return ec, nil +} + +// VLAN Counter + +type SFlowVLANCounters struct { + SFlowBaseCounterRecord + VlanID uint32 + Octets uint64 + UcastPkts uint32 + MulticastPkts uint32 + BroadcastPkts uint32 + Discards uint32 +} + +func decodeVLANCounters(data *[]byte) (SFlowVLANCounters, error) { + vc := SFlowVLANCounters{} + var cdf SFlowCounterDataFormat + + *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) + vc.EnterpriseID, vc.Format = cdf.decode() + vc.EnterpriseID, vc.Format = cdf.decode() + *data, vc.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, vc.VlanID = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, vc.Octets = (*data)[8:], binary.BigEndian.Uint64((*data)[:8]) + *data, vc.UcastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, vc.MulticastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, vc.BroadcastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, vc.Discards = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + return vc, nil +} + +//SFLLACPportState : SFlow LACP Port State (All(4) - 32 bit) +type SFLLACPPortState struct { + PortStateAll uint32 +} + +//LACPcounters : LACP SFlow Counters ( 64 Bytes ) +type SFlowLACPCounters struct { + SFlowBaseCounterRecord + ActorSystemID net.HardwareAddr + PartnerSystemID net.HardwareAddr + AttachedAggID uint32 + LacpPortState SFLLACPPortState + LACPDUsRx uint32 + MarkerPDUsRx uint32 + MarkerResponsePDUsRx uint32 + UnknownRx uint32 + IllegalRx uint32 + LACPDUsTx uint32 + MarkerPDUsTx uint32 + MarkerResponsePDUsTx uint32 +} + +func decodeLACPCounters(data *[]byte) (SFlowLACPCounters, error) { + la := SFlowLACPCounters{} + var cdf SFlowCounterDataFormat + + *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) + la.EnterpriseID, la.Format = cdf.decode() + *data, la.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, la.ActorSystemID = (*data)[6:], (*data)[:6] + *data = (*data)[2:] // remove padding + *data, la.PartnerSystemID = (*data)[6:], (*data)[:6] + *data = (*data)[2:] //remove padding + *data, la.AttachedAggID = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, la.LacpPortState.PortStateAll = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, la.LACPDUsRx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, la.MarkerPDUsRx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, la.MarkerResponsePDUsRx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, la.UnknownRx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, la.IllegalRx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, la.LACPDUsTx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, la.MarkerPDUsTx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, la.MarkerResponsePDUsTx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + + return la, nil + +} + +// ************************************************** +// Processor Counter Record +// ************************************************** +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | counter length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | FiveSecCpu | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | OneMinCpu | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | GiveMinCpu | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | TotalMemory | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | FreeMemory | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +type SFlowProcessorCounters struct { + SFlowBaseCounterRecord + FiveSecCpu uint32 // 5 second average CPU utilization + OneMinCpu uint32 // 1 minute average CPU utilization + FiveMinCpu uint32 // 5 minute average CPU utilization + TotalMemory uint64 // total memory (in bytes) + FreeMemory uint64 // free memory (in bytes) +} + +func decodeProcessorCounters(data *[]byte) (SFlowProcessorCounters, error) { + pc := SFlowProcessorCounters{} + var cdf SFlowCounterDataFormat + var high32, low32 uint32 + + *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) + pc.EnterpriseID, pc.Format = cdf.decode() + *data, pc.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + + *data, pc.FiveSecCpu = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, pc.OneMinCpu = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, pc.FiveMinCpu = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, high32 = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, low32 = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + pc.TotalMemory = (uint64(high32) << 32) + uint64(low32) + *data, high32 = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, low32 = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + pc.FreeMemory = (uint64(high32)) + uint64(low32) + + return pc, nil +} + +// SFlowEthernetFrameFlowRecord give additional information +// about the sampled packet if it's available. +// An agent may or may not provide this information. +type SFlowEthernetFrameFlowRecord struct { + SFlowBaseFlowRecord + FrameLength uint32 + SrcMac net.HardwareAddr + DstMac net.HardwareAddr + Type uint32 +} + +// Ethernet frame flow records have the following structure: + +// 0 15 31 +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | 20 bit Interprise (0) |12 bit format | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | record length | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Source Mac Address | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Destination Mac Address | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ +// | Ethernet Packet Type | +// +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + +func decodeEthernetFrameFlowRecord(data *[]byte) (SFlowEthernetFrameFlowRecord, error) { + es := SFlowEthernetFrameFlowRecord{} + var fdf SFlowFlowDataFormat + + *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) + es.EnterpriseID, es.Format = fdf.decode() + *data, es.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + + *data, es.FrameLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, es.SrcMac = (*data)[8:], net.HardwareAddr((*data)[:6]) + *data, es.DstMac = (*data)[8:], net.HardwareAddr((*data)[:6]) + *data, es.Type = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + return es, nil +} + +//SFlowOpenflowPortCounters : OVS-Sflow OpenFlow Port Counter ( 20 Bytes ) +type SFlowOpenflowPortCounters struct { + SFlowBaseCounterRecord + DatapathID uint64 + PortNo uint32 +} + +func decodeOpenflowportCounters(data *[]byte) (SFlowOpenflowPortCounters, error) { + ofp := SFlowOpenflowPortCounters{} + var cdf SFlowCounterDataFormat + + *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) + ofp.EnterpriseID, ofp.Format = cdf.decode() + *data, ofp.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, ofp.DatapathID = (*data)[8:], binary.BigEndian.Uint64((*data)[:8]) + *data, ofp.PortNo = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + + return ofp, nil +} + +//SFlowAppresourcesCounters : OVS_Sflow App Resources Counter ( 48 Bytes ) +type SFlowAppresourcesCounters struct { + SFlowBaseCounterRecord + UserTime uint32 + SystemTime uint32 + MemUsed uint64 + MemMax uint64 + FdOpen uint32 + FdMax uint32 + ConnOpen uint32 + ConnMax uint32 +} + +func decodeAppresourcesCounters(data *[]byte) (SFlowAppresourcesCounters, error) { + app := SFlowAppresourcesCounters{} + var cdf SFlowCounterDataFormat + + *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) + app.EnterpriseID, app.Format = cdf.decode() + *data, app.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, app.UserTime = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, app.SystemTime = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, app.MemUsed = (*data)[8:], binary.BigEndian.Uint64((*data)[:8]) + *data, app.MemMax = (*data)[8:], binary.BigEndian.Uint64((*data)[:8]) + *data, app.FdOpen = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, app.FdMax = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, app.ConnOpen = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, app.ConnMax = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + + return app, nil +} + +//SFlowOVSDPCounters : OVS-Sflow DataPath Counter ( 32 Bytes ) +type SFlowOVSDPCounters struct { + SFlowBaseCounterRecord + NHit uint32 + NMissed uint32 + NLost uint32 + NMaskHit uint32 + NFlows uint32 + NMasks uint32 +} + +func decodeOVSDPCounters(data *[]byte) (SFlowOVSDPCounters, error) { + dp := SFlowOVSDPCounters{} + var cdf SFlowCounterDataFormat + + *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) + dp.EnterpriseID, dp.Format = cdf.decode() + *data, dp.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, dp.NHit = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, dp.NMissed = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, dp.NLost = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, dp.NMaskHit = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, dp.NFlows = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + *data, dp.NMasks = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + + return dp, nil +} + +//SFlowPORTNAME : OVS-Sflow PORTNAME Counter Sampletype ( 20 Bytes ) +type SFlowPORTNAME struct { + SFlowBaseCounterRecord + Len uint32 + Str string +} + +func decodeString(data *[]byte) (len uint32, str string) { + *data, len = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + str = string((*data)[:len]) + if (len % 4) != 0 { + len += 4 - len%4 + } + *data = (*data)[len:] + return +} + +func decodePortnameCounters(data *[]byte) (SFlowPORTNAME, error) { + pn := SFlowPORTNAME{} + var cdf SFlowCounterDataFormat + + *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) + pn.EnterpriseID, pn.Format = cdf.decode() + *data, pn.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) + pn.Len, pn.Str = decodeString(data) + + return pn, nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/sip.go b/backend/vendor/github.com/google/gopacket/layers/sip.go new file mode 100644 index 0000000..70afdb5 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/sip.go @@ -0,0 +1,542 @@ +// Copyright 2017 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "bytes" + "fmt" + "io" + "strconv" + "strings" + + "github.com/google/gopacket" +) + +// SIPVersion defines the different versions of the SIP Protocol +type SIPVersion uint8 + +// Represents all the versions of SIP protocol +const ( + SIPVersion1 SIPVersion = 1 + SIPVersion2 SIPVersion = 2 +) + +func (sv SIPVersion) String() string { + switch sv { + default: + // Defaulting to SIP/2.0 + return "SIP/2.0" + case SIPVersion1: + return "SIP/1.0" + case SIPVersion2: + return "SIP/2.0" + } +} + +// GetSIPVersion is used to get SIP version constant +func GetSIPVersion(version string) (SIPVersion, error) { + switch strings.ToUpper(version) { + case "SIP/1.0": + return SIPVersion1, nil + case "SIP/2.0": + return SIPVersion2, nil + default: + return 0, fmt.Errorf("Unknown SIP version: '%s'", version) + + } +} + +// SIPMethod defines the different methods of the SIP Protocol +// defined in the different RFC's +type SIPMethod uint16 + +// Here are all the SIP methods +const ( + SIPMethodInvite SIPMethod = 1 // INVITE [RFC3261] + SIPMethodAck SIPMethod = 2 // ACK [RFC3261] + SIPMethodBye SIPMethod = 3 // BYE [RFC3261] + SIPMethodCancel SIPMethod = 4 // CANCEL [RFC3261] + SIPMethodOptions SIPMethod = 5 // OPTIONS [RFC3261] + SIPMethodRegister SIPMethod = 6 // REGISTER [RFC3261] + SIPMethodPrack SIPMethod = 7 // PRACK [RFC3262] + SIPMethodSubscribe SIPMethod = 8 // SUBSCRIBE [RFC6665] + SIPMethodNotify SIPMethod = 9 // NOTIFY [RFC6665] + SIPMethodPublish SIPMethod = 10 // PUBLISH [RFC3903] + SIPMethodInfo SIPMethod = 11 // INFO [RFC6086] + SIPMethodRefer SIPMethod = 12 // REFER [RFC3515] + SIPMethodMessage SIPMethod = 13 // MESSAGE [RFC3428] + SIPMethodUpdate SIPMethod = 14 // UPDATE [RFC3311] + SIPMethodPing SIPMethod = 15 // PING [https://tools.ietf.org/html/draft-fwmiller-ping-03] +) + +func (sm SIPMethod) String() string { + switch sm { + default: + return "Unknown method" + case SIPMethodInvite: + return "INVITE" + case SIPMethodAck: + return "ACK" + case SIPMethodBye: + return "BYE" + case SIPMethodCancel: + return "CANCEL" + case SIPMethodOptions: + return "OPTIONS" + case SIPMethodRegister: + return "REGISTER" + case SIPMethodPrack: + return "PRACK" + case SIPMethodSubscribe: + return "SUBSCRIBE" + case SIPMethodNotify: + return "NOTIFY" + case SIPMethodPublish: + return "PUBLISH" + case SIPMethodInfo: + return "INFO" + case SIPMethodRefer: + return "REFER" + case SIPMethodMessage: + return "MESSAGE" + case SIPMethodUpdate: + return "UPDATE" + case SIPMethodPing: + return "PING" + } +} + +// GetSIPMethod returns the constant of a SIP method +// from its string +func GetSIPMethod(method string) (SIPMethod, error) { + switch strings.ToUpper(method) { + case "INVITE": + return SIPMethodInvite, nil + case "ACK": + return SIPMethodAck, nil + case "BYE": + return SIPMethodBye, nil + case "CANCEL": + return SIPMethodCancel, nil + case "OPTIONS": + return SIPMethodOptions, nil + case "REGISTER": + return SIPMethodRegister, nil + case "PRACK": + return SIPMethodPrack, nil + case "SUBSCRIBE": + return SIPMethodSubscribe, nil + case "NOTIFY": + return SIPMethodNotify, nil + case "PUBLISH": + return SIPMethodPublish, nil + case "INFO": + return SIPMethodInfo, nil + case "REFER": + return SIPMethodRefer, nil + case "MESSAGE": + return SIPMethodMessage, nil + case "UPDATE": + return SIPMethodUpdate, nil + case "PING": + return SIPMethodPing, nil + default: + return 0, fmt.Errorf("Unknown SIP method: '%s'", method) + } +} + +// Here is a correspondance between long header names and short +// as defined in rfc3261 in section 20 +var compactSipHeadersCorrespondance = map[string]string{ + "accept-contact": "a", + "allow-events": "u", + "call-id": "i", + "contact": "m", + "content-encoding": "e", + "content-length": "l", + "content-type": "c", + "event": "o", + "from": "f", + "identity": "y", + "refer-to": "r", + "referred-by": "b", + "reject-contact": "j", + "request-disposition": "d", + "session-expires": "x", + "subject": "s", + "supported": "k", + "to": "t", + "via": "v", +} + +// SIP object will contains information about decoded SIP packet. +// -> The SIP Version +// -> The SIP Headers (in a map[string][]string because of multiple headers with the same name +// -> The SIP Method +// -> The SIP Response code (if it's a response) +// -> The SIP Status line (if it's a response) +// You can easily know the type of the packet with the IsResponse boolean +// +type SIP struct { + BaseLayer + + // Base information + Version SIPVersion + Method SIPMethod + Headers map[string][]string + + // Request + RequestURI string + + // Response + IsResponse bool + ResponseCode int + ResponseStatus string + + // Private fields + cseq int64 + contentLength int64 + lastHeaderParsed string +} + +// decodeSIP decodes the byte slice into a SIP type. It also +// setups the application Layer in PacketBuilder. +func decodeSIP(data []byte, p gopacket.PacketBuilder) error { + s := NewSIP() + err := s.DecodeFromBytes(data, p) + if err != nil { + return err + } + p.AddLayer(s) + p.SetApplicationLayer(s) + return nil +} + +// NewSIP instantiates a new empty SIP object +func NewSIP() *SIP { + s := new(SIP) + s.Headers = make(map[string][]string) + return s +} + +// LayerType returns gopacket.LayerTypeSIP. +func (s *SIP) LayerType() gopacket.LayerType { + return LayerTypeSIP +} + +// Payload returns the base layer payload +func (s *SIP) Payload() []byte { + return s.BaseLayer.Payload +} + +// CanDecode returns the set of layer types that this DecodingLayer can decode +func (s *SIP) CanDecode() gopacket.LayerClass { + return LayerTypeSIP +} + +// NextLayerType returns the layer type contained by this DecodingLayer +func (s *SIP) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +// DecodeFromBytes decodes the slice into the SIP struct. +func (s *SIP) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + // Init some vars for parsing follow-up + var countLines int + var line []byte + var err error + var offset int + + // Iterate on all lines of the SIP Headers + // and stop when we reach the SDP (aka when the new line + // is at index 0 of the remaining packet) + buffer := bytes.NewBuffer(data) + + for { + + // Read next line + line, err = buffer.ReadBytes(byte('\n')) + if err != nil { + if err == io.EOF { + if len(bytes.Trim(line, "\r\n")) > 0 { + df.SetTruncated() + } + break + } else { + return err + } + } + offset += len(line) + + // Trim the new line delimiters + line = bytes.Trim(line, "\r\n") + + // Empty line, we hit Body + if len(line) == 0 { + break + } + + // First line is the SIP request/response line + // Other lines are headers + if countLines == 0 { + err = s.ParseFirstLine(line) + if err != nil { + return err + } + + } else { + err = s.ParseHeader(line) + if err != nil { + return err + } + } + + countLines++ + } + s.BaseLayer = BaseLayer{Contents: data[:offset], Payload: data[offset:]} + + return nil +} + +// ParseFirstLine will compute the first line of a SIP packet. +// The first line will tell us if it's a request or a response. +// +// Examples of first line of SIP Prococol : +// +// Request : INVITE bob@example.com SIP/2.0 +// Response : SIP/2.0 200 OK +// Response : SIP/2.0 501 Not Implemented +// +func (s *SIP) ParseFirstLine(firstLine []byte) error { + + var err error + + // Splits line by space + splits := strings.SplitN(string(firstLine), " ", 3) + + // We must have at least 3 parts + if len(splits) < 3 { + return fmt.Errorf("invalid first SIP line: '%s'", string(firstLine)) + } + + // Determine the SIP packet type + if strings.HasPrefix(splits[0], "SIP") { + + // --> Response + s.IsResponse = true + + // Validate SIP Version + s.Version, err = GetSIPVersion(splits[0]) + if err != nil { + return err + } + + // Compute code + s.ResponseCode, err = strconv.Atoi(splits[1]) + if err != nil { + return err + } + + // Compute status line + s.ResponseStatus = splits[2] + + } else { + + // --> Request + + // Validate method + s.Method, err = GetSIPMethod(splits[0]) + if err != nil { + return err + } + + s.RequestURI = splits[1] + + // Validate SIP Version + s.Version, err = GetSIPVersion(splits[2]) + if err != nil { + return err + } + } + + return nil +} + +// ParseHeader will parse a SIP Header +// SIP Headers are quite simple, there are colon separated name and value +// Headers can be spread over multiple lines +// +// Examples of header : +// +// CSeq: 1 REGISTER +// Via: SIP/2.0/UDP there.com:5060 +// Authorization:Digest username="UserB", +// realm="MCI WorldCom SIP", +// nonce="1cec4341ae6cbe5a359ea9c8e88df84f", opaque="", +// uri="sip:ss2.wcom.com", response="71ba27c64bd01de719686aa4590d5824" +// +func (s *SIP) ParseHeader(header []byte) (err error) { + + // Ignore empty headers + if len(header) == 0 { + return + } + + // Check if this is the following of last header + // RFC 3261 - 7.3.1 - Header Field Format specify that following lines of + // multiline headers must begin by SP or TAB + if header[0] == '\t' || header[0] == ' ' { + + header = bytes.TrimSpace(header) + s.Headers[s.lastHeaderParsed][len(s.Headers[s.lastHeaderParsed])-1] += fmt.Sprintf(" %s", string(header)) + return + } + + // Find the ':' to separate header name and value + index := bytes.Index(header, []byte(":")) + if index >= 0 { + + headerName := strings.ToLower(string(bytes.Trim(header[:index], " "))) + headerValue := string(bytes.Trim(header[index+1:], " ")) + + // Add header to object + s.Headers[headerName] = append(s.Headers[headerName], headerValue) + s.lastHeaderParsed = headerName + + // Compute specific headers + err = s.ParseSpecificHeaders(headerName, headerValue) + if err != nil { + return err + } + } + + return nil +} + +// ParseSpecificHeaders will parse some specific key values from +// specific headers like CSeq or Content-Length integer values +func (s *SIP) ParseSpecificHeaders(headerName string, headerValue string) (err error) { + + switch headerName { + case "cseq": + + // CSeq header value is formatted like that : + // CSeq: 123 INVITE + // We split the value to parse Cseq integer value, and method + splits := strings.Split(headerValue, " ") + if len(splits) > 1 { + + // Parse Cseq + s.cseq, err = strconv.ParseInt(splits[0], 10, 64) + if err != nil { + return err + } + + // Validate method + if s.IsResponse { + s.Method, err = GetSIPMethod(splits[1]) + if err != nil { + return err + } + } + } + + case "content-length": + + // Parse Content-Length + s.contentLength, err = strconv.ParseInt(headerValue, 10, 64) + if err != nil { + return err + } + } + + return nil +} + +// GetAllHeaders will return the full headers of the +// current SIP packets in a map[string][]string +func (s *SIP) GetAllHeaders() map[string][]string { + return s.Headers +} + +// GetHeader will return all the headers with +// the specified name. +func (s *SIP) GetHeader(headerName string) []string { + headerName = strings.ToLower(headerName) + h := make([]string, 0) + if _, ok := s.Headers[headerName]; ok { + return s.Headers[headerName] + } + compactHeader := compactSipHeadersCorrespondance[headerName] + if _, ok := s.Headers[compactHeader]; ok { + return s.Headers[compactHeader] + } + return h +} + +// GetFirstHeader will return the first header with +// the specified name. If the current SIP packet has multiple +// headers with the same name, it returns the first. +func (s *SIP) GetFirstHeader(headerName string) string { + headers := s.GetHeader(headerName) + if len(headers) > 0 { + return headers[0] + } + return "" +} + +// +// Some handy getters for most used SIP headers +// + +// GetAuthorization will return the Authorization +// header of the current SIP packet +func (s *SIP) GetAuthorization() string { + return s.GetFirstHeader("Authorization") +} + +// GetFrom will return the From +// header of the current SIP packet +func (s *SIP) GetFrom() string { + return s.GetFirstHeader("From") +} + +// GetTo will return the To +// header of the current SIP packet +func (s *SIP) GetTo() string { + return s.GetFirstHeader("To") +} + +// GetContact will return the Contact +// header of the current SIP packet +func (s *SIP) GetContact() string { + return s.GetFirstHeader("Contact") +} + +// GetCallID will return the Call-ID +// header of the current SIP packet +func (s *SIP) GetCallID() string { + return s.GetFirstHeader("Call-ID") +} + +// GetUserAgent will return the User-Agent +// header of the current SIP packet +func (s *SIP) GetUserAgent() string { + return s.GetFirstHeader("User-Agent") +} + +// GetContentLength will return the parsed integer +// Content-Length header of the current SIP packet +func (s *SIP) GetContentLength() int64 { + return s.contentLength +} + +// GetCSeq will return the parsed integer CSeq header +// header of the current SIP packet +func (s *SIP) GetCSeq() int64 { + return s.cseq +} diff --git a/backend/vendor/github.com/google/gopacket/layers/stp.go b/backend/vendor/github.com/google/gopacket/layers/stp.go new file mode 100644 index 0000000..bde7d7c --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/stp.go @@ -0,0 +1,27 @@ +// Copyright 2017 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "github.com/google/gopacket" +) + +// STP decode spanning tree protocol packets to transport BPDU (bridge protocol data unit) message. +type STP struct { + BaseLayer +} + +// LayerType returns gopacket.LayerTypeSTP. +func (s *STP) LayerType() gopacket.LayerType { return LayerTypeSTP } + +func decodeSTP(data []byte, p gopacket.PacketBuilder) error { + stp := &STP{} + stp.Contents = data[:] + // TODO: parse the STP protocol into actual subfields. + p.AddLayer(stp) + return nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/tcp.go b/backend/vendor/github.com/google/gopacket/layers/tcp.go new file mode 100644 index 0000000..bcdeb4b --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/tcp.go @@ -0,0 +1,341 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// Copyright 2009-2011 Andreas Krennmair. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "encoding/hex" + "errors" + "fmt" + + "github.com/google/gopacket" +) + +// TCP is the layer for TCP headers. +type TCP struct { + BaseLayer + SrcPort, DstPort TCPPort + Seq uint32 + Ack uint32 + DataOffset uint8 + FIN, SYN, RST, PSH, ACK, URG, ECE, CWR, NS bool + Window uint16 + Checksum uint16 + Urgent uint16 + sPort, dPort []byte + Options []TCPOption + Padding []byte + opts [4]TCPOption + tcpipchecksum +} + +// TCPOptionKind represents a TCP option code. +type TCPOptionKind uint8 + +const ( + TCPOptionKindEndList = 0 + TCPOptionKindNop = 1 + TCPOptionKindMSS = 2 // len = 4 + TCPOptionKindWindowScale = 3 // len = 3 + TCPOptionKindSACKPermitted = 4 // len = 2 + TCPOptionKindSACK = 5 // len = n + TCPOptionKindEcho = 6 // len = 6, obsolete + TCPOptionKindEchoReply = 7 // len = 6, obsolete + TCPOptionKindTimestamps = 8 // len = 10 + TCPOptionKindPartialOrderConnectionPermitted = 9 // len = 2, obsolete + TCPOptionKindPartialOrderServiceProfile = 10 // len = 3, obsolete + TCPOptionKindCC = 11 // obsolete + TCPOptionKindCCNew = 12 // obsolete + TCPOptionKindCCEcho = 13 // obsolete + TCPOptionKindAltChecksum = 14 // len = 3, obsolete + TCPOptionKindAltChecksumData = 15 // len = n, obsolete +) + +func (k TCPOptionKind) String() string { + switch k { + case TCPOptionKindEndList: + return "EndList" + case TCPOptionKindNop: + return "NOP" + case TCPOptionKindMSS: + return "MSS" + case TCPOptionKindWindowScale: + return "WindowScale" + case TCPOptionKindSACKPermitted: + return "SACKPermitted" + case TCPOptionKindSACK: + return "SACK" + case TCPOptionKindEcho: + return "Echo" + case TCPOptionKindEchoReply: + return "EchoReply" + case TCPOptionKindTimestamps: + return "Timestamps" + case TCPOptionKindPartialOrderConnectionPermitted: + return "PartialOrderConnectionPermitted" + case TCPOptionKindPartialOrderServiceProfile: + return "PartialOrderServiceProfile" + case TCPOptionKindCC: + return "CC" + case TCPOptionKindCCNew: + return "CCNew" + case TCPOptionKindCCEcho: + return "CCEcho" + case TCPOptionKindAltChecksum: + return "AltChecksum" + case TCPOptionKindAltChecksumData: + return "AltChecksumData" + default: + return fmt.Sprintf("Unknown(%d)", k) + } +} + +type TCPOption struct { + OptionType TCPOptionKind + OptionLength uint8 + OptionData []byte +} + +func (t TCPOption) String() string { + hd := hex.EncodeToString(t.OptionData) + if len(hd) > 0 { + hd = " 0x" + hd + } + switch t.OptionType { + case TCPOptionKindMSS: + if len(t.OptionData) >= 2 { + return fmt.Sprintf("TCPOption(%s:%v%s)", + t.OptionType, + binary.BigEndian.Uint16(t.OptionData), + hd) + } + + case TCPOptionKindTimestamps: + if len(t.OptionData) == 8 { + return fmt.Sprintf("TCPOption(%s:%v/%v%s)", + t.OptionType, + binary.BigEndian.Uint32(t.OptionData[:4]), + binary.BigEndian.Uint32(t.OptionData[4:8]), + hd) + } + } + return fmt.Sprintf("TCPOption(%s:%s)", t.OptionType, hd) +} + +// LayerType returns gopacket.LayerTypeTCP +func (t *TCP) LayerType() gopacket.LayerType { return LayerTypeTCP } + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (t *TCP) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + var optionLength int + for _, o := range t.Options { + switch o.OptionType { + case 0, 1: + optionLength += 1 + default: + optionLength += 2 + len(o.OptionData) + } + } + if opts.FixLengths { + if rem := optionLength % 4; rem != 0 { + t.Padding = lotsOfZeros[:4-rem] + } + t.DataOffset = uint8((len(t.Padding) + optionLength + 20) / 4) + } + bytes, err := b.PrependBytes(20 + optionLength + len(t.Padding)) + if err != nil { + return err + } + binary.BigEndian.PutUint16(bytes, uint16(t.SrcPort)) + binary.BigEndian.PutUint16(bytes[2:], uint16(t.DstPort)) + binary.BigEndian.PutUint32(bytes[4:], t.Seq) + binary.BigEndian.PutUint32(bytes[8:], t.Ack) + binary.BigEndian.PutUint16(bytes[12:], t.flagsAndOffset()) + binary.BigEndian.PutUint16(bytes[14:], t.Window) + binary.BigEndian.PutUint16(bytes[18:], t.Urgent) + start := 20 + for _, o := range t.Options { + bytes[start] = byte(o.OptionType) + switch o.OptionType { + case 0, 1: + start++ + default: + if opts.FixLengths { + o.OptionLength = uint8(len(o.OptionData) + 2) + } + bytes[start+1] = o.OptionLength + copy(bytes[start+2:start+len(o.OptionData)+2], o.OptionData) + start += len(o.OptionData) + 2 + } + } + copy(bytes[start:], t.Padding) + if opts.ComputeChecksums { + // zero out checksum bytes in current serialization. + bytes[16] = 0 + bytes[17] = 0 + csum, err := t.computeChecksum(b.Bytes(), IPProtocolTCP) + if err != nil { + return err + } + t.Checksum = csum + } + binary.BigEndian.PutUint16(bytes[16:], t.Checksum) + return nil +} + +func (t *TCP) ComputeChecksum() (uint16, error) { + return t.computeChecksum(append(t.Contents, t.Payload...), IPProtocolTCP) +} + +func (t *TCP) flagsAndOffset() uint16 { + f := uint16(t.DataOffset) << 12 + if t.FIN { + f |= 0x0001 + } + if t.SYN { + f |= 0x0002 + } + if t.RST { + f |= 0x0004 + } + if t.PSH { + f |= 0x0008 + } + if t.ACK { + f |= 0x0010 + } + if t.URG { + f |= 0x0020 + } + if t.ECE { + f |= 0x0040 + } + if t.CWR { + f |= 0x0080 + } + if t.NS { + f |= 0x0100 + } + return f +} + +func (tcp *TCP) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 20 { + df.SetTruncated() + return fmt.Errorf("Invalid TCP header. Length %d less than 20", len(data)) + } + tcp.SrcPort = TCPPort(binary.BigEndian.Uint16(data[0:2])) + tcp.sPort = data[0:2] + tcp.DstPort = TCPPort(binary.BigEndian.Uint16(data[2:4])) + tcp.dPort = data[2:4] + tcp.Seq = binary.BigEndian.Uint32(data[4:8]) + tcp.Ack = binary.BigEndian.Uint32(data[8:12]) + tcp.DataOffset = data[12] >> 4 + tcp.FIN = data[13]&0x01 != 0 + tcp.SYN = data[13]&0x02 != 0 + tcp.RST = data[13]&0x04 != 0 + tcp.PSH = data[13]&0x08 != 0 + tcp.ACK = data[13]&0x10 != 0 + tcp.URG = data[13]&0x20 != 0 + tcp.ECE = data[13]&0x40 != 0 + tcp.CWR = data[13]&0x80 != 0 + tcp.NS = data[12]&0x01 != 0 + tcp.Window = binary.BigEndian.Uint16(data[14:16]) + tcp.Checksum = binary.BigEndian.Uint16(data[16:18]) + tcp.Urgent = binary.BigEndian.Uint16(data[18:20]) + if tcp.Options == nil { + // Pre-allocate to avoid allocating a slice. + tcp.Options = tcp.opts[:0] + } else { + tcp.Options = tcp.Options[:0] + } + tcp.Padding = tcp.Padding[:0] + if tcp.DataOffset < 5 { + return fmt.Errorf("Invalid TCP data offset %d < 5", tcp.DataOffset) + } + dataStart := int(tcp.DataOffset) * 4 + if dataStart > len(data) { + df.SetTruncated() + tcp.Payload = nil + tcp.Contents = data + return errors.New("TCP data offset greater than packet length") + } + tcp.Contents = data[:dataStart] + tcp.Payload = data[dataStart:] + // From here on, data points just to the header options. + data = data[20:dataStart] +OPTIONS: + for len(data) > 0 { + tcp.Options = append(tcp.Options, TCPOption{OptionType: TCPOptionKind(data[0])}) + opt := &tcp.Options[len(tcp.Options)-1] + switch opt.OptionType { + case TCPOptionKindEndList: // End of options + opt.OptionLength = 1 + tcp.Padding = data[1:] + break OPTIONS + case TCPOptionKindNop: // 1 byte padding + opt.OptionLength = 1 + default: + if len(data) < 2 { + df.SetTruncated() + return fmt.Errorf("Invalid TCP option length. Length %d less than 2", len(data)) + } + opt.OptionLength = data[1] + if opt.OptionLength < 2 { + return fmt.Errorf("Invalid TCP option length %d < 2", opt.OptionLength) + } else if int(opt.OptionLength) > len(data) { + df.SetTruncated() + return fmt.Errorf("Invalid TCP option length %d exceeds remaining %d bytes", opt.OptionLength, len(data)) + } + opt.OptionData = data[2:opt.OptionLength] + } + data = data[opt.OptionLength:] + } + return nil +} + +func (t *TCP) CanDecode() gopacket.LayerClass { + return LayerTypeTCP +} + +func (t *TCP) NextLayerType() gopacket.LayerType { + lt := t.DstPort.LayerType() + if lt == gopacket.LayerTypePayload { + lt = t.SrcPort.LayerType() + } + return lt +} + +func decodeTCP(data []byte, p gopacket.PacketBuilder) error { + tcp := &TCP{} + err := tcp.DecodeFromBytes(data, p) + p.AddLayer(tcp) + p.SetTransportLayer(tcp) + if err != nil { + return err + } + if p.DecodeOptions().DecodeStreamsAsDatagrams { + return p.NextDecoder(tcp.NextLayerType()) + } else { + return p.NextDecoder(gopacket.LayerTypePayload) + } +} + +func (t *TCP) TransportFlow() gopacket.Flow { + return gopacket.NewFlow(EndpointTCPPort, t.sPort, t.dPort) +} + +// For testing only +func (t *TCP) SetInternalPortsForTesting() { + t.sPort = make([]byte, 2) + t.dPort = make([]byte, 2) + binary.BigEndian.PutUint16(t.sPort, uint16(t.SrcPort)) + binary.BigEndian.PutUint16(t.dPort, uint16(t.DstPort)) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/tcpip.go b/backend/vendor/github.com/google/gopacket/layers/tcpip.go new file mode 100644 index 0000000..64ba51c --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/tcpip.go @@ -0,0 +1,104 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// Copyright 2009-2011 Andreas Krennmair. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "errors" + "fmt" + + "github.com/google/gopacket" +) + +// Checksum computation for TCP/UDP. +type tcpipchecksum struct { + pseudoheader tcpipPseudoHeader +} + +type tcpipPseudoHeader interface { + pseudoheaderChecksum() (uint32, error) +} + +func (ip *IPv4) pseudoheaderChecksum() (csum uint32, err error) { + if err := ip.AddressTo4(); err != nil { + return 0, err + } + csum += (uint32(ip.SrcIP[0]) + uint32(ip.SrcIP[2])) << 8 + csum += uint32(ip.SrcIP[1]) + uint32(ip.SrcIP[3]) + csum += (uint32(ip.DstIP[0]) + uint32(ip.DstIP[2])) << 8 + csum += uint32(ip.DstIP[1]) + uint32(ip.DstIP[3]) + return csum, nil +} + +func (ip *IPv6) pseudoheaderChecksum() (csum uint32, err error) { + if err := ip.AddressTo16(); err != nil { + return 0, err + } + for i := 0; i < 16; i += 2 { + csum += uint32(ip.SrcIP[i]) << 8 + csum += uint32(ip.SrcIP[i+1]) + csum += uint32(ip.DstIP[i]) << 8 + csum += uint32(ip.DstIP[i+1]) + } + return csum, nil +} + +// Calculate the TCP/IP checksum defined in rfc1071. The passed-in csum is any +// initial checksum data that's already been computed. +func tcpipChecksum(data []byte, csum uint32) uint16 { + // to handle odd lengths, we loop to length - 1, incrementing by 2, then + // handle the last byte specifically by checking against the original + // length. + length := len(data) - 1 + for i := 0; i < length; i += 2 { + // For our test packet, doing this manually is about 25% faster + // (740 ns vs. 1000ns) than doing it by calling binary.BigEndian.Uint16. + csum += uint32(data[i]) << 8 + csum += uint32(data[i+1]) + } + if len(data)%2 == 1 { + csum += uint32(data[length]) << 8 + } + for csum > 0xffff { + csum = (csum >> 16) + (csum & 0xffff) + } + return ^uint16(csum) +} + +// computeChecksum computes a TCP or UDP checksum. headerAndPayload is the +// serialized TCP or UDP header plus its payload, with the checksum zero'd +// out. headerProtocol is the IP protocol number of the upper-layer header. +func (c *tcpipchecksum) computeChecksum(headerAndPayload []byte, headerProtocol IPProtocol) (uint16, error) { + if c.pseudoheader == nil { + return 0, errors.New("TCP/IP layer 4 checksum cannot be computed without network layer... call SetNetworkLayerForChecksum to set which layer to use") + } + length := uint32(len(headerAndPayload)) + csum, err := c.pseudoheader.pseudoheaderChecksum() + if err != nil { + return 0, err + } + csum += uint32(headerProtocol) + csum += length & 0xffff + csum += length >> 16 + return tcpipChecksum(headerAndPayload, csum), nil +} + +// SetNetworkLayerForChecksum tells this layer which network layer is wrapping it. +// This is needed for computing the checksum when serializing, since TCP/IP transport +// layer checksums depends on fields in the IPv4 or IPv6 layer that contains it. +// The passed in layer must be an *IPv4 or *IPv6. +func (i *tcpipchecksum) SetNetworkLayerForChecksum(l gopacket.NetworkLayer) error { + switch v := l.(type) { + case *IPv4: + i.pseudoheader = v + case *IPv6: + i.pseudoheader = v + default: + return fmt.Errorf("cannot use layer type %v for tcp checksum network layer", l.LayerType()) + } + return nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/test_creator.py b/backend/vendor/github.com/google/gopacket/layers/test_creator.py new file mode 100644 index 0000000..c92d276 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/test_creator.py @@ -0,0 +1,103 @@ +#!/usr/bin/python +# Copyright 2012 Google, Inc. All rights reserved. + +"""TestCreator creates test templates from pcap files.""" + +import argparse +import base64 +import glob +import re +import string +import subprocess +import sys + + +class Packet(object): + """Helper class encapsulating packet from a pcap file.""" + + def __init__(self, packet_lines): + self.packet_lines = packet_lines + self.data = self._DecodeText(packet_lines) + + @classmethod + def _DecodeText(cls, packet_lines): + packet_bytes = [] + # First line is timestamp and stuff, skip it. + # Format: 0x0010: 0000 0020 3aff 3ffe 0000 0000 0000 0000 ....:.?......... + + for line in packet_lines[1:]: + m = re.match(r'\s+0x[a-f\d]+:\s+((?:[\da-f]{2,4}\s)*)', line, re.IGNORECASE) + if m is None: continue + for hexpart in m.group(1).split(): + packet_bytes.append(base64.b16decode(hexpart.upper())) + return ''.join(packet_bytes) + + def Test(self, name, link_type): + """Yields a test using this packet, as a set of lines.""" + yield '// testPacket%s is the packet:' % name + for line in self.packet_lines: + yield '// ' + line + yield 'var testPacket%s = []byte{' % name + data = list(self.data) + while data: + linebytes, data = data[:16], data[16:] + yield ''.join(['\t'] + ['0x%02x, ' % ord(c) for c in linebytes]) + yield '}' + yield 'func TestPacket%s(t *testing.T) {' % name + yield '\tp := gopacket.NewPacket(testPacket%s, LinkType%s, gopacket.Default)' % (name, link_type) + yield '\tif p.ErrorLayer() != nil {' + yield '\t\tt.Error("Failed to decode packet:", p.ErrorLayer().Error())' + yield '\t}' + yield '\tcheckLayers(p, []gopacket.LayerType{LayerType%s, FILL_ME_IN_WITH_ACTUAL_LAYERS}, t)' % link_type + yield '}' + yield 'func BenchmarkDecodePacket%s(b *testing.B) {' % name + yield '\tfor i := 0; i < b.N; i++ {' + yield '\t\tgopacket.NewPacket(testPacket%s, LinkType%s, gopacket.NoCopy)' % (name, link_type) + yield '\t}' + yield '}' + + + +def GetTcpdumpOutput(filename): + """Runs tcpdump on the given file, returning output as string.""" + return subprocess.check_output( + ['tcpdump', '-XX', '-s', '0', '-n', '-r', filename]) + + +def TcpdumpOutputToPackets(output): + """Reads a pcap file with TCPDump, yielding Packet objects.""" + pdata = [] + for line in output.splitlines(): + if line[0] not in string.whitespace and pdata: + yield Packet(pdata) + pdata = [] + pdata.append(line) + if pdata: + yield Packet(pdata) + + +def main(): + class CustomHelpFormatter(argparse.ArgumentDefaultsHelpFormatter): + def _format_usage(self, usage, actions, groups, prefix=None): + header =('TestCreator creates gopacket tests using a pcap file.\n\n' + 'Tests are written to standard out... they can then be \n' + 'copied into the file of your choice and modified as \n' + 'you see.\n\n') + return header + argparse.ArgumentDefaultsHelpFormatter._format_usage( + self, usage, actions, groups, prefix) + + parser = argparse.ArgumentParser(formatter_class=CustomHelpFormatter) + parser.add_argument('--link_type', default='Ethernet', help='the link type (default: %(default)s)') + parser.add_argument('--name', default='Packet%d', help='the layer type, must have "%d" inside it') + parser.add_argument('files', metavar='file.pcap', type=str, nargs='+', help='the files to process') + + args = parser.parse_args() + + for arg in args.files: + for path in glob.glob(arg): + for i, packet in enumerate(TcpdumpOutputToPackets(GetTcpdumpOutput(path))): + print '\n'.join(packet.Test( + args.name % i, args.link_type)) + +if __name__ == '__main__': + main() diff --git a/backend/vendor/github.com/google/gopacket/layers/tls.go b/backend/vendor/github.com/google/gopacket/layers/tls.go new file mode 100644 index 0000000..5a155d4 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/tls.go @@ -0,0 +1,283 @@ +// Copyright 2018 The GoPacket Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + + "github.com/google/gopacket" +) + +// TLSType defines the type of data after the TLS Record +type TLSType uint8 + +// TLSType known values. +const ( + TLSChangeCipherSpec TLSType = 20 + TLSAlert TLSType = 21 + TLSHandshake TLSType = 22 + TLSApplicationData TLSType = 23 + TLSUnknown TLSType = 255 +) + +// String shows the register type nicely formatted +func (tt TLSType) String() string { + switch tt { + default: + return "Unknown" + case TLSChangeCipherSpec: + return "Change Cipher Spec" + case TLSAlert: + return "Alert" + case TLSHandshake: + return "Handshake" + case TLSApplicationData: + return "Application Data" + } +} + +// TLSVersion represents the TLS version in numeric format +type TLSVersion uint16 + +// Strings shows the TLS version nicely formatted +func (tv TLSVersion) String() string { + switch tv { + default: + return "Unknown" + case 0x0200: + return "SSL 2.0" + case 0x0300: + return "SSL 3.0" + case 0x0301: + return "TLS 1.0" + case 0x0302: + return "TLS 1.1" + case 0x0303: + return "TLS 1.2" + case 0x0304: + return "TLS 1.3" + } +} + +// TLS is specified in RFC 5246 +// +// TLS Record Protocol +// 0 1 2 3 4 5 6 7 8 +// +--+--+--+--+--+--+--+--+ +// | Content Type | +// +--+--+--+--+--+--+--+--+ +// | Version (major) | +// +--+--+--+--+--+--+--+--+ +// | Version (minor) | +// +--+--+--+--+--+--+--+--+ +// | Length | +// +--+--+--+--+--+--+--+--+ +// | Length | +// +--+--+--+--+--+--+--+--+ + +// TLS is actually a slide of TLSrecord structures +type TLS struct { + BaseLayer + + // TLS Records + ChangeCipherSpec []TLSChangeCipherSpecRecord + Handshake []TLSHandshakeRecord + AppData []TLSAppDataRecord + Alert []TLSAlertRecord +} + +// TLSRecordHeader contains all the information that each TLS Record types should have +type TLSRecordHeader struct { + ContentType TLSType + Version TLSVersion + Length uint16 +} + +// LayerType returns gopacket.LayerTypeTLS. +func (t *TLS) LayerType() gopacket.LayerType { return LayerTypeTLS } + +// decodeTLS decodes the byte slice into a TLS type. It also +// setups the application Layer in PacketBuilder. +func decodeTLS(data []byte, p gopacket.PacketBuilder) error { + t := &TLS{} + err := t.DecodeFromBytes(data, p) + if err != nil { + return err + } + p.AddLayer(t) + p.SetApplicationLayer(t) + return nil +} + +// DecodeFromBytes decodes the slice into the TLS struct. +func (t *TLS) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + t.BaseLayer.Contents = data + t.BaseLayer.Payload = nil + + t.ChangeCipherSpec = t.ChangeCipherSpec[:0] + t.Handshake = t.Handshake[:0] + t.AppData = t.AppData[:0] + t.Alert = t.Alert[:0] + + return t.decodeTLSRecords(data, df) +} + +func (t *TLS) decodeTLSRecords(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 5 { + df.SetTruncated() + return errors.New("TLS record too short") + } + + // since there are no further layers, the baselayer's content is + // pointing to this layer + // TODO: Consider removing this + t.BaseLayer = BaseLayer{Contents: data[:len(data)]} + + var h TLSRecordHeader + h.ContentType = TLSType(data[0]) + h.Version = TLSVersion(binary.BigEndian.Uint16(data[1:3])) + h.Length = binary.BigEndian.Uint16(data[3:5]) + + if h.ContentType.String() == "Unknown" { + return errors.New("Unknown TLS record type") + } + + hl := 5 // header length + tl := hl + int(h.Length) + if len(data) < tl { + df.SetTruncated() + return errors.New("TLS packet length mismatch") + } + + switch h.ContentType { + default: + return errors.New("Unknown TLS record type") + case TLSChangeCipherSpec: + var r TLSChangeCipherSpecRecord + e := r.decodeFromBytes(h, data[hl:tl], df) + if e != nil { + return e + } + t.ChangeCipherSpec = append(t.ChangeCipherSpec, r) + case TLSAlert: + var r TLSAlertRecord + e := r.decodeFromBytes(h, data[hl:tl], df) + if e != nil { + return e + } + t.Alert = append(t.Alert, r) + case TLSHandshake: + var r TLSHandshakeRecord + e := r.decodeFromBytes(h, data[hl:tl], df) + if e != nil { + return e + } + t.Handshake = append(t.Handshake, r) + case TLSApplicationData: + var r TLSAppDataRecord + e := r.decodeFromBytes(h, data[hl:tl], df) + if e != nil { + return e + } + t.AppData = append(t.AppData, r) + } + + if len(data) == tl { + return nil + } + return t.decodeTLSRecords(data[tl:len(data)], df) +} + +// CanDecode implements gopacket.DecodingLayer. +func (t *TLS) CanDecode() gopacket.LayerClass { + return LayerTypeTLS +} + +// NextLayerType implements gopacket.DecodingLayer. +func (t *TLS) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypeZero +} + +// Payload returns nil, since TLS encrypted payload is inside TLSAppDataRecord +func (t *TLS) Payload() []byte { + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +func (t *TLS) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + totalLength := 0 + for _, record := range t.ChangeCipherSpec { + if opts.FixLengths { + record.Length = 1 + } + totalLength += 5 + 1 // length of header + record + } + for range t.Handshake { + totalLength += 5 + // TODO + } + for _, record := range t.AppData { + if opts.FixLengths { + record.Length = uint16(len(record.Payload)) + } + totalLength += 5 + len(record.Payload) + } + for _, record := range t.Alert { + if len(record.EncryptedMsg) == 0 { + if opts.FixLengths { + record.Length = 2 + } + totalLength += 5 + 2 + } else { + if opts.FixLengths { + record.Length = uint16(len(record.EncryptedMsg)) + } + totalLength += 5 + len(record.EncryptedMsg) + } + } + data, err := b.PrependBytes(totalLength) + if err != nil { + return err + } + off := 0 + for _, record := range t.ChangeCipherSpec { + off = encodeHeader(record.TLSRecordHeader, data, off) + data[off] = byte(record.Message) + off++ + } + for _, record := range t.Handshake { + off = encodeHeader(record.TLSRecordHeader, data, off) + // TODO + } + for _, record := range t.AppData { + off = encodeHeader(record.TLSRecordHeader, data, off) + copy(data[off:], record.Payload) + off += len(record.Payload) + } + for _, record := range t.Alert { + off = encodeHeader(record.TLSRecordHeader, data, off) + if len(record.EncryptedMsg) == 0 { + data[off] = byte(record.Level) + data[off+1] = byte(record.Description) + off += 2 + } else { + copy(data[off:], record.EncryptedMsg) + off += len(record.EncryptedMsg) + } + } + return nil +} + +func encodeHeader(header TLSRecordHeader, data []byte, offset int) int { + data[offset] = byte(header.ContentType) + binary.BigEndian.PutUint16(data[offset+1:], uint16(header.Version)) + binary.BigEndian.PutUint16(data[offset+3:], header.Length) + + return offset + 5 +} diff --git a/backend/vendor/github.com/google/gopacket/layers/tls_alert.go b/backend/vendor/github.com/google/gopacket/layers/tls_alert.go new file mode 100644 index 0000000..0c5aee0 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/tls_alert.go @@ -0,0 +1,165 @@ +// Copyright 2018 The GoPacket Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "errors" + "fmt" + + "github.com/google/gopacket" +) + +// TLSAlertLevel defines the alert level data type +type TLSAlertLevel uint8 + +// TLSAlertDescr defines the alert descrption data type +type TLSAlertDescr uint8 + +const ( + TLSAlertWarning TLSAlertLevel = 1 + TLSAlertFatal TLSAlertLevel = 2 + TLSAlertUnknownLevel TLSAlertLevel = 255 + + TLSAlertCloseNotify TLSAlertDescr = 0 + TLSAlertUnexpectedMessage TLSAlertDescr = 10 + TLSAlertBadRecordMac TLSAlertDescr = 20 + TLSAlertDecryptionFailedRESERVED TLSAlertDescr = 21 + TLSAlertRecordOverflow TLSAlertDescr = 22 + TLSAlertDecompressionFailure TLSAlertDescr = 30 + TLSAlertHandshakeFailure TLSAlertDescr = 40 + TLSAlertNoCertificateRESERVED TLSAlertDescr = 41 + TLSAlertBadCertificate TLSAlertDescr = 42 + TLSAlertUnsupportedCertificate TLSAlertDescr = 43 + TLSAlertCertificateRevoked TLSAlertDescr = 44 + TLSAlertCertificateExpired TLSAlertDescr = 45 + TLSAlertCertificateUnknown TLSAlertDescr = 46 + TLSAlertIllegalParameter TLSAlertDescr = 47 + TLSAlertUnknownCa TLSAlertDescr = 48 + TLSAlertAccessDenied TLSAlertDescr = 49 + TLSAlertDecodeError TLSAlertDescr = 50 + TLSAlertDecryptError TLSAlertDescr = 51 + TLSAlertExportRestrictionRESERVED TLSAlertDescr = 60 + TLSAlertProtocolVersion TLSAlertDescr = 70 + TLSAlertInsufficientSecurity TLSAlertDescr = 71 + TLSAlertInternalError TLSAlertDescr = 80 + TLSAlertUserCanceled TLSAlertDescr = 90 + TLSAlertNoRenegotiation TLSAlertDescr = 100 + TLSAlertUnsupportedExtension TLSAlertDescr = 110 + TLSAlertUnknownDescription TLSAlertDescr = 255 +) + +// TLS Alert +// 0 1 2 3 4 5 6 7 8 +// +--+--+--+--+--+--+--+--+ +// | Level | +// +--+--+--+--+--+--+--+--+ +// | Description | +// +--+--+--+--+--+--+--+--+ + +// TLSAlertRecord contains all the information that each Alert Record type should have +type TLSAlertRecord struct { + TLSRecordHeader + + Level TLSAlertLevel + Description TLSAlertDescr + + EncryptedMsg []byte +} + +// DecodeFromBytes decodes the slice into the TLS struct. +func (t *TLSAlertRecord) decodeFromBytes(h TLSRecordHeader, data []byte, df gopacket.DecodeFeedback) error { + // TLS Record Header + t.ContentType = h.ContentType + t.Version = h.Version + t.Length = h.Length + + if len(data) < 2 { + df.SetTruncated() + return errors.New("TLS Alert packet too short") + } + + if t.Length == 2 { + t.Level = TLSAlertLevel(data[0]) + t.Description = TLSAlertDescr(data[1]) + } else { + t.Level = TLSAlertUnknownLevel + t.Description = TLSAlertUnknownDescription + t.EncryptedMsg = data + } + + return nil +} + +// Strings shows the TLS alert level nicely formatted +func (al TLSAlertLevel) String() string { + switch al { + default: + return fmt.Sprintf("Unknown(%d)", al) + case TLSAlertWarning: + return "Warning" + case TLSAlertFatal: + return "Fatal" + } +} + +// Strings shows the TLS alert description nicely formatted +func (ad TLSAlertDescr) String() string { + switch ad { + default: + return "Unknown" + case TLSAlertCloseNotify: + return "close_notify" + case TLSAlertUnexpectedMessage: + return "unexpected_message" + case TLSAlertBadRecordMac: + return "bad_record_mac" + case TLSAlertDecryptionFailedRESERVED: + return "decryption_failed_RESERVED" + case TLSAlertRecordOverflow: + return "record_overflow" + case TLSAlertDecompressionFailure: + return "decompression_failure" + case TLSAlertHandshakeFailure: + return "handshake_failure" + case TLSAlertNoCertificateRESERVED: + return "no_certificate_RESERVED" + case TLSAlertBadCertificate: + return "bad_certificate" + case TLSAlertUnsupportedCertificate: + return "unsupported_certificate" + case TLSAlertCertificateRevoked: + return "certificate_revoked" + case TLSAlertCertificateExpired: + return "certificate_expired" + case TLSAlertCertificateUnknown: + return "certificate_unknown" + case TLSAlertIllegalParameter: + return "illegal_parameter" + case TLSAlertUnknownCa: + return "unknown_ca" + case TLSAlertAccessDenied: + return "access_denied" + case TLSAlertDecodeError: + return "decode_error" + case TLSAlertDecryptError: + return "decrypt_error" + case TLSAlertExportRestrictionRESERVED: + return "export_restriction_RESERVED" + case TLSAlertProtocolVersion: + return "protocol_version" + case TLSAlertInsufficientSecurity: + return "insufficient_security" + case TLSAlertInternalError: + return "internal_error" + case TLSAlertUserCanceled: + return "user_canceled" + case TLSAlertNoRenegotiation: + return "no_renegotiation" + case TLSAlertUnsupportedExtension: + return "unsupported_extension" + } +} diff --git a/backend/vendor/github.com/google/gopacket/layers/tls_appdata.go b/backend/vendor/github.com/google/gopacket/layers/tls_appdata.go new file mode 100644 index 0000000..dedd1d5 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/tls_appdata.go @@ -0,0 +1,34 @@ +// Copyright 2018 The GoPacket Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "errors" + + "github.com/google/gopacket" +) + +// TLSAppDataRecord contains all the information that each AppData Record types should have +type TLSAppDataRecord struct { + TLSRecordHeader + Payload []byte +} + +// DecodeFromBytes decodes the slice into the TLS struct. +func (t *TLSAppDataRecord) decodeFromBytes(h TLSRecordHeader, data []byte, df gopacket.DecodeFeedback) error { + // TLS Record Header + t.ContentType = h.ContentType + t.Version = h.Version + t.Length = h.Length + + if len(data) != int(t.Length) { + return errors.New("TLS Application Data length mismatch") + } + + t.Payload = data + return nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/tls_cipherspec.go b/backend/vendor/github.com/google/gopacket/layers/tls_cipherspec.go new file mode 100644 index 0000000..8f3dc62 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/tls_cipherspec.go @@ -0,0 +1,64 @@ +// Copyright 2018 The GoPacket Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "errors" + + "github.com/google/gopacket" +) + +// TLSchangeCipherSpec defines the message value inside ChangeCipherSpec Record +type TLSchangeCipherSpec uint8 + +const ( + TLSChangecipherspecMessage TLSchangeCipherSpec = 1 + TLSChangecipherspecUnknown TLSchangeCipherSpec = 255 +) + +// TLS Change Cipher Spec +// 0 1 2 3 4 5 6 7 8 +// +--+--+--+--+--+--+--+--+ +// | Message | +// +--+--+--+--+--+--+--+--+ + +// TLSChangeCipherSpecRecord defines the type of data inside ChangeCipherSpec Record +type TLSChangeCipherSpecRecord struct { + TLSRecordHeader + + Message TLSchangeCipherSpec +} + +// DecodeFromBytes decodes the slice into the TLS struct. +func (t *TLSChangeCipherSpecRecord) decodeFromBytes(h TLSRecordHeader, data []byte, df gopacket.DecodeFeedback) error { + // TLS Record Header + t.ContentType = h.ContentType + t.Version = h.Version + t.Length = h.Length + + if len(data) != 1 { + df.SetTruncated() + return errors.New("TLS Change Cipher Spec record incorrect length") + } + + t.Message = TLSchangeCipherSpec(data[0]) + if t.Message != TLSChangecipherspecMessage { + t.Message = TLSChangecipherspecUnknown + } + + return nil +} + +// String shows the message value nicely formatted +func (ccs TLSchangeCipherSpec) String() string { + switch ccs { + default: + return "Unknown" + case TLSChangecipherspecMessage: + return "Change Cipher Spec Message" + } +} diff --git a/backend/vendor/github.com/google/gopacket/layers/tls_handshake.go b/backend/vendor/github.com/google/gopacket/layers/tls_handshake.go new file mode 100644 index 0000000..e45e2c7 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/tls_handshake.go @@ -0,0 +1,28 @@ +// Copyright 2018 The GoPacket Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "github.com/google/gopacket" +) + +// TLSHandshakeRecord defines the structure of a Handshare Record +type TLSHandshakeRecord struct { + TLSRecordHeader +} + +// DecodeFromBytes decodes the slice into the TLS struct. +func (t *TLSHandshakeRecord) decodeFromBytes(h TLSRecordHeader, data []byte, df gopacket.DecodeFeedback) error { + // TLS Record Header + t.ContentType = h.ContentType + t.Version = h.Version + t.Length = h.Length + + // TODO + + return nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers/udp.go b/backend/vendor/github.com/google/gopacket/layers/udp.go new file mode 100644 index 0000000..97e81c6 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/udp.go @@ -0,0 +1,133 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// Copyright 2009-2011 Andreas Krennmair. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "fmt" + + "github.com/google/gopacket" +) + +// UDP is the layer for UDP headers. +type UDP struct { + BaseLayer + SrcPort, DstPort UDPPort + Length uint16 + Checksum uint16 + sPort, dPort []byte + tcpipchecksum +} + +// LayerType returns gopacket.LayerTypeUDP +func (u *UDP) LayerType() gopacket.LayerType { return LayerTypeUDP } + +func (udp *UDP) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 8 { + df.SetTruncated() + return fmt.Errorf("Invalid UDP header. Length %d less than 8", len(data)) + } + udp.SrcPort = UDPPort(binary.BigEndian.Uint16(data[0:2])) + udp.sPort = data[0:2] + udp.DstPort = UDPPort(binary.BigEndian.Uint16(data[2:4])) + udp.dPort = data[2:4] + udp.Length = binary.BigEndian.Uint16(data[4:6]) + udp.Checksum = binary.BigEndian.Uint16(data[6:8]) + udp.BaseLayer = BaseLayer{Contents: data[:8]} + switch { + case udp.Length >= 8: + hlen := int(udp.Length) + if hlen > len(data) { + df.SetTruncated() + hlen = len(data) + } + udp.Payload = data[8:hlen] + case udp.Length == 0: // Jumbogram, use entire rest of data + udp.Payload = data[8:] + default: + return fmt.Errorf("UDP packet too small: %d bytes", udp.Length) + } + return nil +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (u *UDP) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + var jumbo bool + + payload := b.Bytes() + if _, ok := u.pseudoheader.(*IPv6); ok { + if len(payload)+8 > 65535 { + jumbo = true + } + } + bytes, err := b.PrependBytes(8) + if err != nil { + return err + } + binary.BigEndian.PutUint16(bytes, uint16(u.SrcPort)) + binary.BigEndian.PutUint16(bytes[2:], uint16(u.DstPort)) + if opts.FixLengths { + if jumbo { + u.Length = 0 + } else { + u.Length = uint16(len(payload)) + 8 + } + } + binary.BigEndian.PutUint16(bytes[4:], u.Length) + if opts.ComputeChecksums { + // zero out checksum bytes + bytes[6] = 0 + bytes[7] = 0 + csum, err := u.computeChecksum(b.Bytes(), IPProtocolUDP) + if err != nil { + return err + } + u.Checksum = csum + } + binary.BigEndian.PutUint16(bytes[6:], u.Checksum) + return nil +} + +func (u *UDP) CanDecode() gopacket.LayerClass { + return LayerTypeUDP +} + +// NextLayerType use the destination port to select the +// right next decoder. It tries first to decode via the +// destination port, then the source port. +func (u *UDP) NextLayerType() gopacket.LayerType { + if lt := u.DstPort.LayerType(); lt != gopacket.LayerTypePayload { + return lt + } + return u.SrcPort.LayerType() +} + +func decodeUDP(data []byte, p gopacket.PacketBuilder) error { + udp := &UDP{} + err := udp.DecodeFromBytes(data, p) + p.AddLayer(udp) + p.SetTransportLayer(udp) + if err != nil { + return err + } + return p.NextDecoder(udp.NextLayerType()) +} + +func (u *UDP) TransportFlow() gopacket.Flow { + return gopacket.NewFlow(EndpointUDPPort, u.sPort, u.dPort) +} + +// For testing only +func (u *UDP) SetInternalPortsForTesting() { + u.sPort = make([]byte, 2) + u.dPort = make([]byte, 2) + binary.BigEndian.PutUint16(u.sPort, uint16(u.SrcPort)) + binary.BigEndian.PutUint16(u.dPort, uint16(u.DstPort)) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/udplite.go b/backend/vendor/github.com/google/gopacket/layers/udplite.go new file mode 100644 index 0000000..7d84c51 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/udplite.go @@ -0,0 +1,44 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// Copyright 2009-2011 Andreas Krennmair. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "github.com/google/gopacket" +) + +// UDPLite is the layer for UDP-Lite headers (rfc 3828). +type UDPLite struct { + BaseLayer + SrcPort, DstPort UDPLitePort + ChecksumCoverage uint16 + Checksum uint16 + sPort, dPort []byte +} + +// LayerType returns gopacket.LayerTypeUDPLite +func (u *UDPLite) LayerType() gopacket.LayerType { return LayerTypeUDPLite } + +func decodeUDPLite(data []byte, p gopacket.PacketBuilder) error { + udp := &UDPLite{ + SrcPort: UDPLitePort(binary.BigEndian.Uint16(data[0:2])), + sPort: data[0:2], + DstPort: UDPLitePort(binary.BigEndian.Uint16(data[2:4])), + dPort: data[2:4], + ChecksumCoverage: binary.BigEndian.Uint16(data[4:6]), + Checksum: binary.BigEndian.Uint16(data[6:8]), + BaseLayer: BaseLayer{data[:8], data[8:]}, + } + p.AddLayer(udp) + p.SetTransportLayer(udp) + return p.NextDecoder(gopacket.LayerTypePayload) +} + +func (u *UDPLite) TransportFlow() gopacket.Flow { + return gopacket.NewFlow(EndpointUDPLitePort, u.sPort, u.dPort) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/usb.go b/backend/vendor/github.com/google/gopacket/layers/usb.go new file mode 100644 index 0000000..d611e0f --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/usb.go @@ -0,0 +1,292 @@ +// Copyright 2014 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "github.com/google/gopacket" +) + +type USBEventType uint8 + +const ( + USBEventTypeSubmit USBEventType = 'S' + USBEventTypeComplete USBEventType = 'C' + USBEventTypeError USBEventType = 'E' +) + +func (a USBEventType) String() string { + switch a { + case USBEventTypeSubmit: + return "SUBMIT" + case USBEventTypeComplete: + return "COMPLETE" + case USBEventTypeError: + return "ERROR" + default: + return "Unknown event type" + } +} + +type USBRequestBlockSetupRequest uint8 + +const ( + USBRequestBlockSetupRequestGetStatus USBRequestBlockSetupRequest = 0x00 + USBRequestBlockSetupRequestClearFeature USBRequestBlockSetupRequest = 0x01 + USBRequestBlockSetupRequestSetFeature USBRequestBlockSetupRequest = 0x03 + USBRequestBlockSetupRequestSetAddress USBRequestBlockSetupRequest = 0x05 + USBRequestBlockSetupRequestGetDescriptor USBRequestBlockSetupRequest = 0x06 + USBRequestBlockSetupRequestSetDescriptor USBRequestBlockSetupRequest = 0x07 + USBRequestBlockSetupRequestGetConfiguration USBRequestBlockSetupRequest = 0x08 + USBRequestBlockSetupRequestSetConfiguration USBRequestBlockSetupRequest = 0x09 + USBRequestBlockSetupRequestSetIdle USBRequestBlockSetupRequest = 0x0a +) + +func (a USBRequestBlockSetupRequest) String() string { + switch a { + case USBRequestBlockSetupRequestGetStatus: + return "GET_STATUS" + case USBRequestBlockSetupRequestClearFeature: + return "CLEAR_FEATURE" + case USBRequestBlockSetupRequestSetFeature: + return "SET_FEATURE" + case USBRequestBlockSetupRequestSetAddress: + return "SET_ADDRESS" + case USBRequestBlockSetupRequestGetDescriptor: + return "GET_DESCRIPTOR" + case USBRequestBlockSetupRequestSetDescriptor: + return "SET_DESCRIPTOR" + case USBRequestBlockSetupRequestGetConfiguration: + return "GET_CONFIGURATION" + case USBRequestBlockSetupRequestSetConfiguration: + return "SET_CONFIGURATION" + case USBRequestBlockSetupRequestSetIdle: + return "SET_IDLE" + default: + return "UNKNOWN" + } +} + +type USBTransportType uint8 + +const ( + USBTransportTypeTransferIn USBTransportType = 0x80 // Indicates send or receive + USBTransportTypeIsochronous USBTransportType = 0x00 // Isochronous transfers occur continuously and periodically. They typically contain time sensitive information, such as an audio or video stream. + USBTransportTypeInterrupt USBTransportType = 0x01 // Interrupt transfers are typically non-periodic, small device "initiated" communication requiring bounded latency, such as pointing devices or keyboards. + USBTransportTypeControl USBTransportType = 0x02 // Control transfers are typically used for command and status operations. + USBTransportTypeBulk USBTransportType = 0x03 // Bulk transfers can be used for large bursty data, using all remaining available bandwidth, no guarantees on bandwidth or latency, such as file transfers. +) + +type USBDirectionType uint8 + +const ( + USBDirectionTypeUnknown USBDirectionType = iota + USBDirectionTypeIn + USBDirectionTypeOut +) + +func (a USBDirectionType) String() string { + switch a { + case USBDirectionTypeIn: + return "In" + case USBDirectionTypeOut: + return "Out" + default: + return "Unknown direction type" + } +} + +// The reference at http://www.beyondlogic.org/usbnutshell/usb1.shtml contains more information about the protocol. +type USB struct { + BaseLayer + ID uint64 + EventType USBEventType + TransferType USBTransportType + Direction USBDirectionType + EndpointNumber uint8 + DeviceAddress uint8 + BusID uint16 + TimestampSec int64 + TimestampUsec int32 + Setup bool + Data bool + Status int32 + UrbLength uint32 + UrbDataLength uint32 + + UrbInterval uint32 + UrbStartFrame uint32 + UrbCopyOfTransferFlags uint32 + IsoNumDesc uint32 +} + +func (u *USB) LayerType() gopacket.LayerType { return LayerTypeUSB } + +func (m *USB) NextLayerType() gopacket.LayerType { + if m.Setup { + return LayerTypeUSBRequestBlockSetup + } else if m.Data { + } + + return m.TransferType.LayerType() +} + +func decodeUSB(data []byte, p gopacket.PacketBuilder) error { + d := &USB{} + + return decodingLayerDecoder(d, data, p) +} + +func (m *USB) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 40 { + df.SetTruncated() + return errors.New("USB < 40 bytes") + } + m.ID = binary.LittleEndian.Uint64(data[0:8]) + m.EventType = USBEventType(data[8]) + m.TransferType = USBTransportType(data[9]) + + m.EndpointNumber = data[10] & 0x7f + if data[10]&uint8(USBTransportTypeTransferIn) > 0 { + m.Direction = USBDirectionTypeIn + } else { + m.Direction = USBDirectionTypeOut + } + + m.DeviceAddress = data[11] + m.BusID = binary.LittleEndian.Uint16(data[12:14]) + + if uint(data[14]) == 0 { + m.Setup = true + } + + if uint(data[15]) == 0 { + m.Data = true + } + + m.TimestampSec = int64(binary.LittleEndian.Uint64(data[16:24])) + m.TimestampUsec = int32(binary.LittleEndian.Uint32(data[24:28])) + m.Status = int32(binary.LittleEndian.Uint32(data[28:32])) + m.UrbLength = binary.LittleEndian.Uint32(data[32:36]) + m.UrbDataLength = binary.LittleEndian.Uint32(data[36:40]) + + m.Contents = data[:40] + m.Payload = data[40:] + + if m.Setup { + m.Payload = data[40:] + } else if m.Data { + m.Payload = data[uint32(len(data))-m.UrbDataLength:] + } + + // if 64 bit, dissect_linux_usb_pseudo_header_ext + if false { + m.UrbInterval = binary.LittleEndian.Uint32(data[40:44]) + m.UrbStartFrame = binary.LittleEndian.Uint32(data[44:48]) + m.UrbDataLength = binary.LittleEndian.Uint32(data[48:52]) + m.IsoNumDesc = binary.LittleEndian.Uint32(data[52:56]) + m.Contents = data[:56] + m.Payload = data[56:] + } + + // crc5 or crc16 + // eop (end of packet) + + return nil +} + +type USBRequestBlockSetup struct { + BaseLayer + RequestType uint8 + Request USBRequestBlockSetupRequest + Value uint16 + Index uint16 + Length uint16 +} + +func (u *USBRequestBlockSetup) LayerType() gopacket.LayerType { return LayerTypeUSBRequestBlockSetup } + +func (m *USBRequestBlockSetup) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +func (m *USBRequestBlockSetup) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + m.RequestType = data[0] + m.Request = USBRequestBlockSetupRequest(data[1]) + m.Value = binary.LittleEndian.Uint16(data[2:4]) + m.Index = binary.LittleEndian.Uint16(data[4:6]) + m.Length = binary.LittleEndian.Uint16(data[6:8]) + m.Contents = data[:8] + m.Payload = data[8:] + return nil +} + +func decodeUSBRequestBlockSetup(data []byte, p gopacket.PacketBuilder) error { + d := &USBRequestBlockSetup{} + return decodingLayerDecoder(d, data, p) +} + +type USBControl struct { + BaseLayer +} + +func (u *USBControl) LayerType() gopacket.LayerType { return LayerTypeUSBControl } + +func (m *USBControl) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +func (m *USBControl) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + m.Contents = data + return nil +} + +func decodeUSBControl(data []byte, p gopacket.PacketBuilder) error { + d := &USBControl{} + return decodingLayerDecoder(d, data, p) +} + +type USBInterrupt struct { + BaseLayer +} + +func (u *USBInterrupt) LayerType() gopacket.LayerType { return LayerTypeUSBInterrupt } + +func (m *USBInterrupt) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +func (m *USBInterrupt) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + m.Contents = data + return nil +} + +func decodeUSBInterrupt(data []byte, p gopacket.PacketBuilder) error { + d := &USBInterrupt{} + return decodingLayerDecoder(d, data, p) +} + +type USBBulk struct { + BaseLayer +} + +func (u *USBBulk) LayerType() gopacket.LayerType { return LayerTypeUSBBulk } + +func (m *USBBulk) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypePayload +} + +func (m *USBBulk) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + m.Contents = data + return nil +} + +func decodeUSBBulk(data []byte, p gopacket.PacketBuilder) error { + d := &USBBulk{} + return decodingLayerDecoder(d, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/vrrp.go b/backend/vendor/github.com/google/gopacket/layers/vrrp.go new file mode 100644 index 0000000..ffaafe6 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/vrrp.go @@ -0,0 +1,156 @@ +// Copyright 2016 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "net" + + "github.com/google/gopacket" +) + +/* + This layer provides decoding for Virtual Router Redundancy Protocol (VRRP) v2. + https://tools.ietf.org/html/rfc3768#section-5 + 0 1 2 3 + 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + |Version| Type | Virtual Rtr ID| Priority | Count IP Addrs| + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | Auth Type | Adver Int | Checksum | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | IP Address (1) | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | . | + | . | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | IP Address (n) | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | Authentication Data (1) | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | Authentication Data (2) | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +*/ + +type VRRPv2Type uint8 +type VRRPv2AuthType uint8 + +const ( + VRRPv2Advertisement VRRPv2Type = 0x01 // router advertisement +) + +// String conversions for VRRP message types +func (v VRRPv2Type) String() string { + switch v { + case VRRPv2Advertisement: + return "VRRPv2 Advertisement" + default: + return "" + } +} + +const ( + VRRPv2AuthNoAuth VRRPv2AuthType = 0x00 // No Authentication + VRRPv2AuthReserved1 VRRPv2AuthType = 0x01 // Reserved field 1 + VRRPv2AuthReserved2 VRRPv2AuthType = 0x02 // Reserved field 2 +) + +func (v VRRPv2AuthType) String() string { + switch v { + case VRRPv2AuthNoAuth: + return "No Authentication" + case VRRPv2AuthReserved1: + return "Reserved" + case VRRPv2AuthReserved2: + return "Reserved" + default: + return "" + } +} + +// VRRPv2 represents an VRRP v2 message. +type VRRPv2 struct { + BaseLayer + Version uint8 // The version field specifies the VRRP protocol version of this packet (v2) + Type VRRPv2Type // The type field specifies the type of this VRRP packet. The only type defined in v2 is ADVERTISEMENT + VirtualRtrID uint8 // identifies the virtual router this packet is reporting status for + Priority uint8 // specifies the sending VRRP router's priority for the virtual router (100 = default) + CountIPAddr uint8 // The number of IP addresses contained in this VRRP advertisement. + AuthType VRRPv2AuthType // identifies the authentication method being utilized + AdverInt uint8 // The Advertisement interval indicates the time interval (in seconds) between ADVERTISEMENTS. The default is 1 second + Checksum uint16 // used to detect data corruption in the VRRP message. + IPAddress []net.IP // one or more IP addresses associated with the virtual router. Specified in the CountIPAddr field. +} + +// LayerType returns LayerTypeVRRP for VRRP v2 message. +func (v *VRRPv2) LayerType() gopacket.LayerType { return LayerTypeVRRP } + +func (v *VRRPv2) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + + v.BaseLayer = BaseLayer{Contents: data[:len(data)]} + v.Version = data[0] >> 4 // high nibble == VRRP version. We're expecting v2 + + v.Type = VRRPv2Type(data[0] & 0x0F) // low nibble == VRRP type. Expecting 1 (advertisement) + if v.Type != 1 { + // rfc3768: A packet with unknown type MUST be discarded. + return errors.New("Unrecognized VRRPv2 type field.") + } + + v.VirtualRtrID = data[1] + v.Priority = data[2] + + v.CountIPAddr = data[3] + if v.CountIPAddr < 1 { + return errors.New("VRRPv2 number of IP addresses is not valid.") + } + + v.AuthType = VRRPv2AuthType(data[4]) + v.AdverInt = uint8(data[5]) + v.Checksum = binary.BigEndian.Uint16(data[6:8]) + + // populate the IPAddress field. The number of addresses is specified in the v.CountIPAddr field + // offset references the starting byte containing the list of ip addresses + offset := 8 + for i := uint8(0); i < v.CountIPAddr; i++ { + v.IPAddress = append(v.IPAddress, data[offset:offset+4]) + offset += 4 + } + + // any trailing packets here may be authentication data and *should* be ignored in v2 as per RFC + // + // 5.3.10. Authentication Data + // + // The authentication string is currently only used to maintain + // backwards compatibility with RFC 2338. It SHOULD be set to zero on + // transmission and ignored on reception. + return nil +} + +// CanDecode specifies the layer type in which we are attempting to unwrap. +func (v *VRRPv2) CanDecode() gopacket.LayerClass { + return LayerTypeVRRP +} + +// NextLayerType specifies the next layer that should be decoded. VRRP does not contain any further payload, so we set to 0 +func (v *VRRPv2) NextLayerType() gopacket.LayerType { + return gopacket.LayerTypeZero +} + +// The VRRP packet does not include payload data. Setting byte slice to nil +func (v *VRRPv2) Payload() []byte { + return nil +} + +// decodeVRRP will parse VRRP v2 +func decodeVRRP(data []byte, p gopacket.PacketBuilder) error { + if len(data) < 8 { + return errors.New("Not a valid VRRP packet. Packet length is too small.") + } + v := &VRRPv2{} + return decodingLayerDecoder(v, data, p) +} diff --git a/backend/vendor/github.com/google/gopacket/layers/vxlan.go b/backend/vendor/github.com/google/gopacket/layers/vxlan.go new file mode 100644 index 0000000..e479cd8 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers/vxlan.go @@ -0,0 +1,123 @@ +// Copyright 2016 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package layers + +import ( + "encoding/binary" + "errors" + "fmt" + + "github.com/google/gopacket" +) + +// VXLAN is specifed in RFC 7348 https://tools.ietf.org/html/rfc7348 +// G, D, A, Group Policy ID from https://tools.ietf.org/html/draft-smith-vxlan-group-policy-00 +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// 0 8 16 24 32 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// |G|R|R|R|I|R|R|R|R|D|R|R|A|R|R|R| Group Policy ID | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | 24 bit VXLAN Network Identifier | Reserved | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + +// VXLAN is a VXLAN packet header +type VXLAN struct { + BaseLayer + ValidIDFlag bool // 'I' bit per RFC 7348 + VNI uint32 // 'VXLAN Network Identifier' 24 bits per RFC 7348 + GBPExtension bool // 'G' bit per Group Policy https://tools.ietf.org/html/draft-smith-vxlan-group-policy-00 + GBPDontLearn bool // 'D' bit per Group Policy + GBPApplied bool // 'A' bit per Group Policy + GBPGroupPolicyID uint16 // 'Group Policy ID' 16 bits per Group Policy +} + +// LayerType returns LayerTypeVXLAN +func (vx *VXLAN) LayerType() gopacket.LayerType { return LayerTypeVXLAN } + +// CanDecode returns the layer type this DecodingLayer can decode +func (vx *VXLAN) CanDecode() gopacket.LayerClass { + return LayerTypeVXLAN +} + +// NextLayerType retuns the next layer we should see after vxlan +func (vx *VXLAN) NextLayerType() gopacket.LayerType { + return LayerTypeEthernet +} + +// DecodeFromBytes takes a byte buffer and decodes +func (vx *VXLAN) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { + if len(data) < 8 { + return errors.New("vxlan packet too small") + } + // VNI is a 24bit number, Uint32 requires 32 bits + var buf [4]byte + copy(buf[1:], data[4:7]) + + // RFC 7348 https://tools.ietf.org/html/rfc7348 + vx.ValidIDFlag = data[0]&0x08 > 0 // 'I' bit per RFC7348 + vx.VNI = binary.BigEndian.Uint32(buf[:]) // VXLAN Network Identifier per RFC7348 + + // Group Based Policy https://tools.ietf.org/html/draft-smith-vxlan-group-policy-00 + vx.GBPExtension = data[0]&0x80 > 0 // 'G' bit per the group policy draft + vx.GBPDontLearn = data[1]&0x40 > 0 // 'D' bit - the egress VTEP MUST NOT learn the source address of the encapsulated frame. + vx.GBPApplied = data[1]&0x80 > 0 // 'A' bit - indicates that the group policy has already been applied to this packet. + vx.GBPGroupPolicyID = binary.BigEndian.Uint16(data[2:4]) // Policy ID as per the group policy draft + + // Layer information + const vxlanLength = 8 + vx.Contents = data[:vxlanLength] + vx.Payload = data[vxlanLength:] + + return nil + +} + +func decodeVXLAN(data []byte, p gopacket.PacketBuilder) error { + vx := &VXLAN{} + err := vx.DecodeFromBytes(data, p) + if err != nil { + return err + } + + p.AddLayer(vx) + return p.NextDecoder(LinkTypeEthernet) +} + +// SerializeTo writes the serialized form of this layer into the +// SerializationBuffer, implementing gopacket.SerializableLayer. +// See the docs for gopacket.SerializableLayer for more info. +func (vx *VXLAN) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { + bytes, err := b.PrependBytes(8) + if err != nil { + return err + } + + // PrependBytes does not guarantee that bytes are zeroed. Setting flags via OR requires that they start off at zero + bytes[0] = 0 + bytes[1] = 0 + + if vx.ValidIDFlag { + bytes[0] |= 0x08 + } + if vx.GBPExtension { + bytes[0] |= 0x80 + } + if vx.GBPDontLearn { + bytes[1] |= 0x40 + } + if vx.GBPApplied { + bytes[1] |= 0x80 + } + + binary.BigEndian.PutUint16(bytes[2:4], vx.GBPGroupPolicyID) + if vx.VNI >= 1<<24 { + return fmt.Errorf("Virtual Network Identifier = %x exceeds max for 24-bit uint", vx.VNI) + } + binary.BigEndian.PutUint32(bytes[4:8], vx.VNI<<8) + return nil +} diff --git a/backend/vendor/github.com/google/gopacket/layers_decoder.go b/backend/vendor/github.com/google/gopacket/layers_decoder.go new file mode 100644 index 0000000..8c1f108 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layers_decoder.go @@ -0,0 +1,101 @@ +// Copyright 2019 The GoPacket Authors. All rights reserved. + +package gopacket + +// Created by gen.go, don't edit manually +// Generated at 2019-06-18 11:37:31.308731293 +0600 +06 m=+0.000842599 + +// LayersDecoder returns DecodingLayerFunc for specified +// DecodingLayerContainer, LayerType value to start decoding with and +// some DecodeFeedback. +func LayersDecoder(dl DecodingLayerContainer, first LayerType, df DecodeFeedback) DecodingLayerFunc { + firstDec, ok := dl.Decoder(first) + if !ok { + return func([]byte, *[]LayerType) (LayerType, error) { + return first, nil + } + } + if dlc, ok := dl.(DecodingLayerSparse); ok { + return func(data []byte, decoded *[]LayerType) (LayerType, error) { + *decoded = (*decoded)[:0] // Truncated decoded layers. + typ := first + decoder := firstDec + for { + if err := decoder.DecodeFromBytes(data, df); err != nil { + return LayerTypeZero, err + } + *decoded = append(*decoded, typ) + typ = decoder.NextLayerType() + if data = decoder.LayerPayload(); len(data) == 0 { + break + } + if decoder, ok = dlc.Decoder(typ); !ok { + return typ, nil + } + } + return LayerTypeZero, nil + } + } + if dlc, ok := dl.(DecodingLayerArray); ok { + return func(data []byte, decoded *[]LayerType) (LayerType, error) { + *decoded = (*decoded)[:0] // Truncated decoded layers. + typ := first + decoder := firstDec + for { + if err := decoder.DecodeFromBytes(data, df); err != nil { + return LayerTypeZero, err + } + *decoded = append(*decoded, typ) + typ = decoder.NextLayerType() + if data = decoder.LayerPayload(); len(data) == 0 { + break + } + if decoder, ok = dlc.Decoder(typ); !ok { + return typ, nil + } + } + return LayerTypeZero, nil + } + } + if dlc, ok := dl.(DecodingLayerMap); ok { + return func(data []byte, decoded *[]LayerType) (LayerType, error) { + *decoded = (*decoded)[:0] // Truncated decoded layers. + typ := first + decoder := firstDec + for { + if err := decoder.DecodeFromBytes(data, df); err != nil { + return LayerTypeZero, err + } + *decoded = append(*decoded, typ) + typ = decoder.NextLayerType() + if data = decoder.LayerPayload(); len(data) == 0 { + break + } + if decoder, ok = dlc.Decoder(typ); !ok { + return typ, nil + } + } + return LayerTypeZero, nil + } + } + dlc := dl + return func(data []byte, decoded *[]LayerType) (LayerType, error) { + *decoded = (*decoded)[:0] // Truncated decoded layers. + typ := first + decoder := firstDec + for { + if err := decoder.DecodeFromBytes(data, df); err != nil { + return LayerTypeZero, err + } + *decoded = append(*decoded, typ) + typ = decoder.NextLayerType() + if data = decoder.LayerPayload(); len(data) == 0 { + break + } + if decoder, ok = dlc.Decoder(typ); !ok { + return typ, nil + } + } + return LayerTypeZero, nil + } +} diff --git a/backend/vendor/github.com/google/gopacket/layertype.go b/backend/vendor/github.com/google/gopacket/layertype.go new file mode 100644 index 0000000..3abfee1 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/layertype.go @@ -0,0 +1,111 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package gopacket + +import ( + "fmt" + "strconv" +) + +// LayerType is a unique identifier for each type of layer. This enumeration +// does not match with any externally available numbering scheme... it's solely +// usable/useful within this library as a means for requesting layer types +// (see Packet.Layer) and determining which types of layers have been decoded. +// +// New LayerTypes may be created by calling gopacket.RegisterLayerType. +type LayerType int64 + +// LayerTypeMetadata contains metadata associated with each LayerType. +type LayerTypeMetadata struct { + // Name is the string returned by each layer type's String method. + Name string + // Decoder is the decoder to use when the layer type is passed in as a + // Decoder. + Decoder Decoder +} + +type layerTypeMetadata struct { + inUse bool + LayerTypeMetadata +} + +// DecodersByLayerName maps layer names to decoders for those layers. +// This allows users to specify decoders by name to a program and have that +// program pick the correct decoder accordingly. +var DecodersByLayerName = map[string]Decoder{} + +const maxLayerType = 2000 + +var ltMeta [maxLayerType]layerTypeMetadata +var ltMetaMap = map[LayerType]layerTypeMetadata{} + +// RegisterLayerType creates a new layer type and registers it globally. +// The number passed in must be unique, or a runtime panic will occur. Numbers +// 0-999 are reserved for the gopacket library. Numbers 1000-1999 should be +// used for common application-specific types, and are very fast. Any other +// number (negative or >= 2000) may be used for uncommon application-specific +// types, and are somewhat slower (they require a map lookup over an array +// index). +func RegisterLayerType(num int, meta LayerTypeMetadata) LayerType { + if 0 <= num && num < maxLayerType { + if ltMeta[num].inUse { + panic("Layer type already exists") + } + } else { + if ltMetaMap[LayerType(num)].inUse { + panic("Layer type already exists") + } + } + return OverrideLayerType(num, meta) +} + +// OverrideLayerType acts like RegisterLayerType, except that if the layer type +// has already been registered, it overrides the metadata with the passed-in +// metadata intead of panicing. +func OverrideLayerType(num int, meta LayerTypeMetadata) LayerType { + if 0 <= num && num < maxLayerType { + ltMeta[num] = layerTypeMetadata{ + inUse: true, + LayerTypeMetadata: meta, + } + } else { + ltMetaMap[LayerType(num)] = layerTypeMetadata{ + inUse: true, + LayerTypeMetadata: meta, + } + } + DecodersByLayerName[meta.Name] = meta.Decoder + return LayerType(num) +} + +// Decode decodes the given data using the decoder registered with the layer +// type. +func (t LayerType) Decode(data []byte, c PacketBuilder) error { + var d Decoder + if 0 <= int(t) && int(t) < maxLayerType { + d = ltMeta[int(t)].Decoder + } else { + d = ltMetaMap[t].Decoder + } + if d != nil { + return d.Decode(data, c) + } + return fmt.Errorf("Layer type %v has no associated decoder", t) +} + +// String returns the string associated with this layer type. +func (t LayerType) String() (s string) { + if 0 <= int(t) && int(t) < maxLayerType { + s = ltMeta[int(t)].Name + } else { + s = ltMetaMap[t].Name + } + if s == "" { + s = strconv.Itoa(int(t)) + } + return +} diff --git a/backend/vendor/github.com/google/gopacket/packet.go b/backend/vendor/github.com/google/gopacket/packet.go new file mode 100644 index 0000000..3a7c4b3 --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/packet.go @@ -0,0 +1,864 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package gopacket + +import ( + "bytes" + "encoding/hex" + "errors" + "fmt" + "io" + "net" + "os" + "reflect" + "runtime/debug" + "strings" + "syscall" + "time" +) + +// CaptureInfo provides standardized information about a packet captured off +// the wire or read from a file. +type CaptureInfo struct { + // Timestamp is the time the packet was captured, if that is known. + Timestamp time.Time + // CaptureLength is the total number of bytes read off of the wire. + CaptureLength int + // Length is the size of the original packet. Should always be >= + // CaptureLength. + Length int + // InterfaceIndex + InterfaceIndex int + // The packet source can place ancillary data of various types here. + // For example, the afpacket source can report the VLAN of captured + // packets this way. + AncillaryData []interface{} +} + +// PacketMetadata contains metadata for a packet. +type PacketMetadata struct { + CaptureInfo + // Truncated is true if packet decoding logic detects that there are fewer + // bytes in the packet than are detailed in various headers (for example, if + // the number of bytes in the IPv4 contents/payload is less than IPv4.Length). + // This is also set automatically for packets captured off the wire if + // CaptureInfo.CaptureLength < CaptureInfo.Length. + Truncated bool +} + +// Packet is the primary object used by gopacket. Packets are created by a +// Decoder's Decode call. A packet is made up of a set of Data, which +// is broken into a number of Layers as it is decoded. +type Packet interface { + //// Functions for outputting the packet as a human-readable string: + //// ------------------------------------------------------------------ + // String returns a human-readable string representation of the packet. + // It uses LayerString on each layer to output the layer. + String() string + // Dump returns a verbose human-readable string representation of the packet, + // including a hex dump of all layers. It uses LayerDump on each layer to + // output the layer. + Dump() string + + //// Functions for accessing arbitrary packet layers: + //// ------------------------------------------------------------------ + // Layers returns all layers in this packet, computing them as necessary + Layers() []Layer + // Layer returns the first layer in this packet of the given type, or nil + Layer(LayerType) Layer + // LayerClass returns the first layer in this packet of the given class, + // or nil. + LayerClass(LayerClass) Layer + + //// Functions for accessing specific types of packet layers. These functions + //// return the first layer of each type found within the packet. + //// ------------------------------------------------------------------ + // LinkLayer returns the first link layer in the packet + LinkLayer() LinkLayer + // NetworkLayer returns the first network layer in the packet + NetworkLayer() NetworkLayer + // TransportLayer returns the first transport layer in the packet + TransportLayer() TransportLayer + // ApplicationLayer returns the first application layer in the packet + ApplicationLayer() ApplicationLayer + // ErrorLayer is particularly useful, since it returns nil if the packet + // was fully decoded successfully, and non-nil if an error was encountered + // in decoding and the packet was only partially decoded. Thus, its output + // can be used to determine if the entire packet was able to be decoded. + ErrorLayer() ErrorLayer + + //// Functions for accessing data specific to the packet: + //// ------------------------------------------------------------------ + // Data returns the set of bytes that make up this entire packet. + Data() []byte + // Metadata returns packet metadata associated with this packet. + Metadata() *PacketMetadata +} + +// packet contains all the information we need to fulfill the Packet interface, +// and its two "subclasses" (yes, no such thing in Go, bear with me), +// eagerPacket and lazyPacket, provide eager and lazy decoding logic around the +// various functions needed to access this information. +type packet struct { + // data contains the entire packet data for a packet + data []byte + // initialLayers is space for an initial set of layers already created inside + // the packet. + initialLayers [6]Layer + // layers contains each layer we've already decoded + layers []Layer + // last is the last layer added to the packet + last Layer + // metadata is the PacketMetadata for this packet + metadata PacketMetadata + + decodeOptions DecodeOptions + + // Pointers to the various important layers + link LinkLayer + network NetworkLayer + transport TransportLayer + application ApplicationLayer + failure ErrorLayer +} + +func (p *packet) SetTruncated() { + p.metadata.Truncated = true +} + +func (p *packet) SetLinkLayer(l LinkLayer) { + if p.link == nil { + p.link = l + } +} + +func (p *packet) SetNetworkLayer(l NetworkLayer) { + if p.network == nil { + p.network = l + } +} + +func (p *packet) SetTransportLayer(l TransportLayer) { + if p.transport == nil { + p.transport = l + } +} + +func (p *packet) SetApplicationLayer(l ApplicationLayer) { + if p.application == nil { + p.application = l + } +} + +func (p *packet) SetErrorLayer(l ErrorLayer) { + if p.failure == nil { + p.failure = l + } +} + +func (p *packet) AddLayer(l Layer) { + p.layers = append(p.layers, l) + p.last = l +} + +func (p *packet) DumpPacketData() { + fmt.Fprint(os.Stderr, p.packetDump()) + os.Stderr.Sync() +} + +func (p *packet) Metadata() *PacketMetadata { + return &p.metadata +} + +func (p *packet) Data() []byte { + return p.data +} + +func (p *packet) DecodeOptions() *DecodeOptions { + return &p.decodeOptions +} + +func (p *packet) addFinalDecodeError(err error, stack []byte) { + fail := &DecodeFailure{err: err, stack: stack} + if p.last == nil { + fail.data = p.data + } else { + fail.data = p.last.LayerPayload() + } + p.AddLayer(fail) + p.SetErrorLayer(fail) +} + +func (p *packet) recoverDecodeError() { + if !p.decodeOptions.SkipDecodeRecovery { + if r := recover(); r != nil { + p.addFinalDecodeError(fmt.Errorf("%v", r), debug.Stack()) + } + } +} + +// LayerString outputs an individual layer as a string. The layer is output +// in a single line, with no trailing newline. This function is specifically +// designed to do the right thing for most layers... it follows the following +// rules: +// * If the Layer has a String function, just output that. +// * Otherwise, output all exported fields in the layer, recursing into +// exported slices and structs. +// NOTE: This is NOT THE SAME AS fmt's "%#v". %#v will output both exported +// and unexported fields... many times packet layers contain unexported stuff +// that would just mess up the output of the layer, see for example the +// Payload layer and it's internal 'data' field, which contains a large byte +// array that would really mess up formatting. +func LayerString(l Layer) string { + return fmt.Sprintf("%v\t%s", l.LayerType(), layerString(reflect.ValueOf(l), false, false)) +} + +// Dumper dumps verbose information on a value. If a layer type implements +// Dumper, then its LayerDump() string will include the results in its output. +type Dumper interface { + Dump() string +} + +// LayerDump outputs a very verbose string representation of a layer. Its +// output is a concatenation of LayerString(l) and hex.Dump(l.LayerContents()). +// It contains newlines and ends with a newline. +func LayerDump(l Layer) string { + var b bytes.Buffer + b.WriteString(LayerString(l)) + b.WriteByte('\n') + if d, ok := l.(Dumper); ok { + dump := d.Dump() + if dump != "" { + b.WriteString(dump) + if dump[len(dump)-1] != '\n' { + b.WriteByte('\n') + } + } + } + b.WriteString(hex.Dump(l.LayerContents())) + return b.String() +} + +// layerString outputs, recursively, a layer in a "smart" way. See docs for +// LayerString for more details. +// +// Params: +// i - value to write out +// anonymous: if we're currently recursing an anonymous member of a struct +// writeSpace: if we've already written a value in a struct, and need to +// write a space before writing more. This happens when we write various +// anonymous values, and need to keep writing more. +func layerString(v reflect.Value, anonymous bool, writeSpace bool) string { + // Let String() functions take precedence. + if v.CanInterface() { + if s, ok := v.Interface().(fmt.Stringer); ok { + return s.String() + } + } + // Reflect, and spit out all the exported fields as key=value. + switch v.Type().Kind() { + case reflect.Interface, reflect.Ptr: + if v.IsNil() { + return "nil" + } + r := v.Elem() + return layerString(r, anonymous, writeSpace) + case reflect.Struct: + var b bytes.Buffer + typ := v.Type() + if !anonymous { + b.WriteByte('{') + } + for i := 0; i < v.NumField(); i++ { + // Check if this is upper-case. + ftype := typ.Field(i) + f := v.Field(i) + if ftype.Anonymous { + anonStr := layerString(f, true, writeSpace) + writeSpace = writeSpace || anonStr != "" + b.WriteString(anonStr) + } else if ftype.PkgPath == "" { // exported + if writeSpace { + b.WriteByte(' ') + } + writeSpace = true + fmt.Fprintf(&b, "%s=%s", typ.Field(i).Name, layerString(f, false, writeSpace)) + } + } + if !anonymous { + b.WriteByte('}') + } + return b.String() + case reflect.Slice: + var b bytes.Buffer + b.WriteByte('[') + if v.Len() > 4 { + fmt.Fprintf(&b, "..%d..", v.Len()) + } else { + for j := 0; j < v.Len(); j++ { + if j != 0 { + b.WriteString(", ") + } + b.WriteString(layerString(v.Index(j), false, false)) + } + } + b.WriteByte(']') + return b.String() + } + return fmt.Sprintf("%v", v.Interface()) +} + +const ( + longBytesLength = 128 +) + +// LongBytesGoString returns a string representation of the byte slice shortened +// using the format '{ ... ( bytes)}' if it +// exceeds a predetermined length. Can be used to avoid filling the display with +// very long byte strings. +func LongBytesGoString(buf []byte) string { + if len(buf) < longBytesLength { + return fmt.Sprintf("%#v", buf) + } + s := fmt.Sprintf("%#v", buf[:longBytesLength-1]) + s = strings.TrimSuffix(s, "}") + return fmt.Sprintf("%s ... (%d bytes)}", s, len(buf)) +} + +func baseLayerString(value reflect.Value) string { + t := value.Type() + content := value.Field(0) + c := make([]byte, content.Len()) + for i := range c { + c[i] = byte(content.Index(i).Uint()) + } + payload := value.Field(1) + p := make([]byte, payload.Len()) + for i := range p { + p[i] = byte(payload.Index(i).Uint()) + } + return fmt.Sprintf("%s{Contents:%s, Payload:%s}", t.String(), + LongBytesGoString(c), + LongBytesGoString(p)) +} + +func layerGoString(i interface{}, b *bytes.Buffer) { + if s, ok := i.(fmt.GoStringer); ok { + b.WriteString(s.GoString()) + return + } + + var v reflect.Value + var ok bool + if v, ok = i.(reflect.Value); !ok { + v = reflect.ValueOf(i) + } + switch v.Kind() { + case reflect.Ptr, reflect.Interface: + if v.Kind() == reflect.Ptr { + b.WriteByte('&') + } + layerGoString(v.Elem().Interface(), b) + case reflect.Struct: + t := v.Type() + b.WriteString(t.String()) + b.WriteByte('{') + for i := 0; i < v.NumField(); i++ { + if i > 0 { + b.WriteString(", ") + } + if t.Field(i).Name == "BaseLayer" { + fmt.Fprintf(b, "BaseLayer:%s", baseLayerString(v.Field(i))) + } else if v.Field(i).Kind() == reflect.Struct { + fmt.Fprintf(b, "%s:", t.Field(i).Name) + layerGoString(v.Field(i), b) + } else if v.Field(i).Kind() == reflect.Ptr { + b.WriteByte('&') + layerGoString(v.Field(i), b) + } else { + fmt.Fprintf(b, "%s:%#v", t.Field(i).Name, v.Field(i)) + } + } + b.WriteByte('}') + default: + fmt.Fprintf(b, "%#v", i) + } +} + +// LayerGoString returns a representation of the layer in Go syntax, +// taking care to shorten "very long" BaseLayer byte slices +func LayerGoString(l Layer) string { + b := new(bytes.Buffer) + layerGoString(l, b) + return b.String() +} + +func (p *packet) packetString() string { + var b bytes.Buffer + fmt.Fprintf(&b, "PACKET: %d bytes", len(p.Data())) + if p.metadata.Truncated { + b.WriteString(", truncated") + } + if p.metadata.Length > 0 { + fmt.Fprintf(&b, ", wire length %d cap length %d", p.metadata.Length, p.metadata.CaptureLength) + } + if !p.metadata.Timestamp.IsZero() { + fmt.Fprintf(&b, " @ %v", p.metadata.Timestamp) + } + b.WriteByte('\n') + for i, l := range p.layers { + fmt.Fprintf(&b, "- Layer %d (%02d bytes) = %s\n", i+1, len(l.LayerContents()), LayerString(l)) + } + return b.String() +} + +func (p *packet) packetDump() string { + var b bytes.Buffer + fmt.Fprintf(&b, "-- FULL PACKET DATA (%d bytes) ------------------------------------\n%s", len(p.data), hex.Dump(p.data)) + for i, l := range p.layers { + fmt.Fprintf(&b, "--- Layer %d ---\n%s", i+1, LayerDump(l)) + } + return b.String() +} + +// eagerPacket is a packet implementation that does eager decoding. Upon +// initial construction, it decodes all the layers it can from packet data. +// eagerPacket implements Packet and PacketBuilder. +type eagerPacket struct { + packet +} + +var errNilDecoder = errors.New("NextDecoder passed nil decoder, probably an unsupported decode type") + +func (p *eagerPacket) NextDecoder(next Decoder) error { + if next == nil { + return errNilDecoder + } + if p.last == nil { + return errors.New("NextDecoder called, but no layers added yet") + } + d := p.last.LayerPayload() + if len(d) == 0 { + return nil + } + // Since we're eager, immediately call the next decoder. + return next.Decode(d, p) +} +func (p *eagerPacket) initialDecode(dec Decoder) { + defer p.recoverDecodeError() + err := dec.Decode(p.data, p) + if err != nil { + p.addFinalDecodeError(err, nil) + } +} +func (p *eagerPacket) LinkLayer() LinkLayer { + return p.link +} +func (p *eagerPacket) NetworkLayer() NetworkLayer { + return p.network +} +func (p *eagerPacket) TransportLayer() TransportLayer { + return p.transport +} +func (p *eagerPacket) ApplicationLayer() ApplicationLayer { + return p.application +} +func (p *eagerPacket) ErrorLayer() ErrorLayer { + return p.failure +} +func (p *eagerPacket) Layers() []Layer { + return p.layers +} +func (p *eagerPacket) Layer(t LayerType) Layer { + for _, l := range p.layers { + if l.LayerType() == t { + return l + } + } + return nil +} +func (p *eagerPacket) LayerClass(lc LayerClass) Layer { + for _, l := range p.layers { + if lc.Contains(l.LayerType()) { + return l + } + } + return nil +} +func (p *eagerPacket) String() string { return p.packetString() } +func (p *eagerPacket) Dump() string { return p.packetDump() } + +// lazyPacket does lazy decoding on its packet data. On construction it does +// no initial decoding. For each function call, it decodes only as many layers +// as are necessary to compute the return value for that function. +// lazyPacket implements Packet and PacketBuilder. +type lazyPacket struct { + packet + next Decoder +} + +func (p *lazyPacket) NextDecoder(next Decoder) error { + if next == nil { + return errNilDecoder + } + p.next = next + return nil +} +func (p *lazyPacket) decodeNextLayer() { + if p.next == nil { + return + } + d := p.data + if p.last != nil { + d = p.last.LayerPayload() + } + next := p.next + p.next = nil + // We've just set p.next to nil, so if we see we have no data, this should be + // the final call we get to decodeNextLayer if we return here. + if len(d) == 0 { + return + } + defer p.recoverDecodeError() + err := next.Decode(d, p) + if err != nil { + p.addFinalDecodeError(err, nil) + } +} +func (p *lazyPacket) LinkLayer() LinkLayer { + for p.link == nil && p.next != nil { + p.decodeNextLayer() + } + return p.link +} +func (p *lazyPacket) NetworkLayer() NetworkLayer { + for p.network == nil && p.next != nil { + p.decodeNextLayer() + } + return p.network +} +func (p *lazyPacket) TransportLayer() TransportLayer { + for p.transport == nil && p.next != nil { + p.decodeNextLayer() + } + return p.transport +} +func (p *lazyPacket) ApplicationLayer() ApplicationLayer { + for p.application == nil && p.next != nil { + p.decodeNextLayer() + } + return p.application +} +func (p *lazyPacket) ErrorLayer() ErrorLayer { + for p.failure == nil && p.next != nil { + p.decodeNextLayer() + } + return p.failure +} +func (p *lazyPacket) Layers() []Layer { + for p.next != nil { + p.decodeNextLayer() + } + return p.layers +} +func (p *lazyPacket) Layer(t LayerType) Layer { + for _, l := range p.layers { + if l.LayerType() == t { + return l + } + } + numLayers := len(p.layers) + for p.next != nil { + p.decodeNextLayer() + for _, l := range p.layers[numLayers:] { + if l.LayerType() == t { + return l + } + } + numLayers = len(p.layers) + } + return nil +} +func (p *lazyPacket) LayerClass(lc LayerClass) Layer { + for _, l := range p.layers { + if lc.Contains(l.LayerType()) { + return l + } + } + numLayers := len(p.layers) + for p.next != nil { + p.decodeNextLayer() + for _, l := range p.layers[numLayers:] { + if lc.Contains(l.LayerType()) { + return l + } + } + numLayers = len(p.layers) + } + return nil +} +func (p *lazyPacket) String() string { p.Layers(); return p.packetString() } +func (p *lazyPacket) Dump() string { p.Layers(); return p.packetDump() } + +// DecodeOptions tells gopacket how to decode a packet. +type DecodeOptions struct { + // Lazy decoding decodes the minimum number of layers needed to return data + // for a packet at each function call. Be careful using this with concurrent + // packet processors, as each call to packet.* could mutate the packet, and + // two concurrent function calls could interact poorly. + Lazy bool + // NoCopy decoding doesn't copy its input buffer into storage that's owned by + // the packet. If you can guarantee that the bytes underlying the slice + // passed into NewPacket aren't going to be modified, this can be faster. If + // there's any chance that those bytes WILL be changed, this will invalidate + // your packets. + NoCopy bool + // SkipDecodeRecovery skips over panic recovery during packet decoding. + // Normally, when packets decode, if a panic occurs, that panic is captured + // by a recover(), and a DecodeFailure layer is added to the packet detailing + // the issue. If this flag is set, panics are instead allowed to continue up + // the stack. + SkipDecodeRecovery bool + // DecodeStreamsAsDatagrams enables routing of application-level layers in the TCP + // decoder. If true, we should try to decode layers after TCP in single packets. + // This is disabled by default because the reassembly package drives the decoding + // of TCP payload data after reassembly. + DecodeStreamsAsDatagrams bool +} + +// Default decoding provides the safest (but slowest) method for decoding +// packets. It eagerly processes all layers (so it's concurrency-safe) and it +// copies its input buffer upon creation of the packet (so the packet remains +// valid if the underlying slice is modified. Both of these take time, +// though, so beware. If you can guarantee that the packet will only be used +// by one goroutine at a time, set Lazy decoding. If you can guarantee that +// the underlying slice won't change, set NoCopy decoding. +var Default = DecodeOptions{} + +// Lazy is a DecodeOptions with just Lazy set. +var Lazy = DecodeOptions{Lazy: true} + +// NoCopy is a DecodeOptions with just NoCopy set. +var NoCopy = DecodeOptions{NoCopy: true} + +// DecodeStreamsAsDatagrams is a DecodeOptions with just DecodeStreamsAsDatagrams set. +var DecodeStreamsAsDatagrams = DecodeOptions{DecodeStreamsAsDatagrams: true} + +// NewPacket creates a new Packet object from a set of bytes. The +// firstLayerDecoder tells it how to interpret the first layer from the bytes, +// future layers will be generated from that first layer automatically. +func NewPacket(data []byte, firstLayerDecoder Decoder, options DecodeOptions) Packet { + if !options.NoCopy { + dataCopy := make([]byte, len(data)) + copy(dataCopy, data) + data = dataCopy + } + if options.Lazy { + p := &lazyPacket{ + packet: packet{data: data, decodeOptions: options}, + next: firstLayerDecoder, + } + p.layers = p.initialLayers[:0] + // Crazy craziness: + // If the following return statemet is REMOVED, and Lazy is FALSE, then + // eager packet processing becomes 17% FASTER. No, there is no logical + // explanation for this. However, it's such a hacky micro-optimization that + // we really can't rely on it. It appears to have to do with the size the + // compiler guesses for this function's stack space, since one symptom is + // that with the return statement in place, we more than double calls to + // runtime.morestack/runtime.lessstack. We'll hope the compiler gets better + // over time and we get this optimization for free. Until then, we'll have + // to live with slower packet processing. + return p + } + p := &eagerPacket{ + packet: packet{data: data, decodeOptions: options}, + } + p.layers = p.initialLayers[:0] + p.initialDecode(firstLayerDecoder) + return p +} + +// PacketDataSource is an interface for some source of packet data. Users may +// create their own implementations, or use the existing implementations in +// gopacket/pcap (libpcap, allows reading from live interfaces or from +// pcap files) or gopacket/pfring (PF_RING, allows reading from live +// interfaces). +type PacketDataSource interface { + // ReadPacketData returns the next packet available from this data source. + // It returns: + // data: The bytes of an individual packet. + // ci: Metadata about the capture + // err: An error encountered while reading packet data. If err != nil, + // then data/ci will be ignored. + ReadPacketData() (data []byte, ci CaptureInfo, err error) +} + +// ConcatFinitePacketDataSources returns a PacketDataSource that wraps a set +// of internal PacketDataSources, each of which will stop with io.EOF after +// reading a finite number of packets. The returned PacketDataSource will +// return all packets from the first finite source, followed by all packets from +// the second, etc. Once all finite sources have returned io.EOF, the returned +// source will as well. +func ConcatFinitePacketDataSources(pds ...PacketDataSource) PacketDataSource { + c := concat(pds) + return &c +} + +type concat []PacketDataSource + +func (c *concat) ReadPacketData() (data []byte, ci CaptureInfo, err error) { + for len(*c) > 0 { + data, ci, err = (*c)[0].ReadPacketData() + if err == io.EOF { + *c = (*c)[1:] + continue + } + return + } + return nil, CaptureInfo{}, io.EOF +} + +// ZeroCopyPacketDataSource is an interface to pull packet data from sources +// that allow data to be returned without copying to a user-controlled buffer. +// It's very similar to PacketDataSource, except that the caller must be more +// careful in how the returned buffer is handled. +type ZeroCopyPacketDataSource interface { + // ZeroCopyReadPacketData returns the next packet available from this data source. + // It returns: + // data: The bytes of an individual packet. Unlike with + // PacketDataSource's ReadPacketData, the slice returned here points + // to a buffer owned by the data source. In particular, the bytes in + // this buffer may be changed by future calls to + // ZeroCopyReadPacketData. Do not use the returned buffer after + // subsequent ZeroCopyReadPacketData calls. + // ci: Metadata about the capture + // err: An error encountered while reading packet data. If err != nil, + // then data/ci will be ignored. + ZeroCopyReadPacketData() (data []byte, ci CaptureInfo, err error) +} + +// PacketSource reads in packets from a PacketDataSource, decodes them, and +// returns them. +// +// There are currently two different methods for reading packets in through +// a PacketSource: +// +// Reading With Packets Function +// +// This method is the most convenient and easiest to code, but lacks +// flexibility. Packets returns a 'chan Packet', then asynchronously writes +// packets into that channel. Packets uses a blocking channel, and closes +// it if an io.EOF is returned by the underlying PacketDataSource. All other +// PacketDataSource errors are ignored and discarded. +// for packet := range packetSource.Packets() { +// ... +// } +// +// Reading With NextPacket Function +// +// This method is the most flexible, and exposes errors that may be +// encountered by the underlying PacketDataSource. It's also the fastest +// in a tight loop, since it doesn't have the overhead of a channel +// read/write. However, it requires the user to handle errors, most +// importantly the io.EOF error in cases where packets are being read from +// a file. +// for { +// packet, err := packetSource.NextPacket() +// if err == io.EOF { +// break +// } else if err != nil { +// log.Println("Error:", err) +// continue +// } +// handlePacket(packet) // Do something with each packet. +// } +type PacketSource struct { + source PacketDataSource + decoder Decoder + // DecodeOptions is the set of options to use for decoding each piece + // of packet data. This can/should be changed by the user to reflect the + // way packets should be decoded. + DecodeOptions + c chan Packet +} + +// NewPacketSource creates a packet data source. +func NewPacketSource(source PacketDataSource, decoder Decoder) *PacketSource { + return &PacketSource{ + source: source, + decoder: decoder, + } +} + +// NextPacket returns the next decoded packet from the PacketSource. On error, +// it returns a nil packet and a non-nil error. +func (p *PacketSource) NextPacket() (Packet, error) { + data, ci, err := p.source.ReadPacketData() + if err != nil { + return nil, err + } + packet := NewPacket(data, p.decoder, p.DecodeOptions) + m := packet.Metadata() + m.CaptureInfo = ci + m.Truncated = m.Truncated || ci.CaptureLength < ci.Length + return packet, nil +} + +// packetsToChannel reads in all packets from the packet source and sends them +// to the given channel. This routine terminates when a non-temporary error +// is returned by NextPacket(). +func (p *PacketSource) packetsToChannel() { + defer close(p.c) + for { + packet, err := p.NextPacket() + if err == nil { + p.c <- packet + continue + } + + // Immediately retry for temporary network errors + if nerr, ok := err.(net.Error); ok && nerr.Temporary() { + continue + } + + // Immediately retry for EAGAIN + if err == syscall.EAGAIN { + continue + } + + // Immediately break for known unrecoverable errors + if err == io.EOF || err == io.ErrUnexpectedEOF || + err == io.ErrNoProgress || err == io.ErrClosedPipe || err == io.ErrShortBuffer || + err == syscall.EBADF || + strings.Contains(err.Error(), "use of closed file") { + break + } + + // Sleep briefly and try again + time.Sleep(time.Millisecond * time.Duration(5)) + } +} + +// Packets returns a channel of packets, allowing easy iterating over +// packets. Packets will be asynchronously read in from the underlying +// PacketDataSource and written to the returned channel. If the underlying +// PacketDataSource returns an io.EOF error, the channel will be closed. +// If any other error is encountered, it is ignored. +// +// for packet := range packetSource.Packets() { +// handlePacket(packet) // Do something with each packet. +// } +// +// If called more than once, returns the same channel. +func (p *PacketSource) Packets() chan Packet { + if p.c == nil { + p.c = make(chan Packet, 1000) + go p.packetsToChannel() + } + return p.c +} diff --git a/backend/vendor/github.com/google/gopacket/parser.go b/backend/vendor/github.com/google/gopacket/parser.go new file mode 100644 index 0000000..4a4676f --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/parser.go @@ -0,0 +1,350 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package gopacket + +import ( + "fmt" +) + +// A container for single LayerType->DecodingLayer mapping. +type decodingLayerElem struct { + typ LayerType + dec DecodingLayer +} + +// DecodingLayer is an interface for packet layers that can decode themselves. +// +// The important part of DecodingLayer is that they decode themselves in-place. +// Calling DecodeFromBytes on a DecodingLayer totally resets the entire layer to +// the new state defined by the data passed in. A returned error leaves the +// DecodingLayer in an unknown intermediate state, thus its fields should not be +// trusted. +// +// Because the DecodingLayer is resetting its own fields, a call to +// DecodeFromBytes should normally not require any memory allocation. +type DecodingLayer interface { + // DecodeFromBytes resets the internal state of this layer to the state + // defined by the passed-in bytes. Slices in the DecodingLayer may + // reference the passed-in data, so care should be taken to copy it + // first should later modification of data be required before the + // DecodingLayer is discarded. + DecodeFromBytes(data []byte, df DecodeFeedback) error + // CanDecode returns the set of LayerTypes this DecodingLayer can + // decode. For Layers that are also DecodingLayers, this will most + // often be that Layer's LayerType(). + CanDecode() LayerClass + // NextLayerType returns the LayerType which should be used to decode + // the LayerPayload. + NextLayerType() LayerType + // LayerPayload is the set of bytes remaining to decode after a call to + // DecodeFromBytes. + LayerPayload() []byte +} + +// DecodingLayerFunc decodes given packet and stores decoded LayerType +// values into specified slice. Returns either first encountered +// unsupported LayerType value or decoding error. In case of success, +// returns (LayerTypeZero, nil). +type DecodingLayerFunc func([]byte, *[]LayerType) (LayerType, error) + +// DecodingLayerContainer stores all DecodingLayer-s and serves as a +// searching tool for DecodingLayerParser. +type DecodingLayerContainer interface { + // Put adds new DecodingLayer to container. The new instance of + // the same DecodingLayerContainer is returned so it may be + // implemented as a value receiver. + Put(DecodingLayer) DecodingLayerContainer + // Decoder returns DecodingLayer to decode given LayerType and + // true if it was found. If no decoder found, return false. + Decoder(LayerType) (DecodingLayer, bool) + // LayersDecoder returns DecodingLayerFunc which decodes given + // packet, starting with specified LayerType and DecodeFeedback. + LayersDecoder(first LayerType, df DecodeFeedback) DecodingLayerFunc +} + +// DecodingLayerSparse is a sparse array-based implementation of +// DecodingLayerContainer. Each DecodingLayer is addressed in an +// allocated slice by LayerType value itself. Though this is the +// fastest container it may be memory-consuming if used with big +// LayerType values. +type DecodingLayerSparse []DecodingLayer + +// Put implements DecodingLayerContainer interface. +func (dl DecodingLayerSparse) Put(d DecodingLayer) DecodingLayerContainer { + maxLayerType := LayerType(len(dl) - 1) + for _, typ := range d.CanDecode().LayerTypes() { + if typ > maxLayerType { + maxLayerType = typ + } + } + + if extra := maxLayerType - LayerType(len(dl)) + 1; extra > 0 { + dl = append(dl, make([]DecodingLayer, extra)...) + } + + for _, typ := range d.CanDecode().LayerTypes() { + dl[typ] = d + } + return dl +} + +// LayersDecoder implements DecodingLayerContainer interface. +func (dl DecodingLayerSparse) LayersDecoder(first LayerType, df DecodeFeedback) DecodingLayerFunc { + return LayersDecoder(dl, first, df) +} + +// Decoder implements DecodingLayerContainer interface. +func (dl DecodingLayerSparse) Decoder(typ LayerType) (DecodingLayer, bool) { + if int64(typ) < int64(len(dl)) { + decoder := dl[typ] + return decoder, decoder != nil + } + return nil, false +} + +// DecodingLayerArray is an array-based implementation of +// DecodingLayerContainer. Each DecodingLayer is searched linearly in +// an allocated slice in one-by-one fashion. +type DecodingLayerArray []decodingLayerElem + +// Put implements DecodingLayerContainer interface. +func (dl DecodingLayerArray) Put(d DecodingLayer) DecodingLayerContainer { +TYPES: + for _, typ := range d.CanDecode().LayerTypes() { + for i := range dl { + if dl[i].typ == typ { + dl[i].dec = d + continue TYPES + } + } + dl = append(dl, decodingLayerElem{typ, d}) + } + return dl +} + +// Decoder implements DecodingLayerContainer interface. +func (dl DecodingLayerArray) Decoder(typ LayerType) (DecodingLayer, bool) { + for i := range dl { + if dl[i].typ == typ { + return dl[i].dec, true + } + } + return nil, false +} + +// LayersDecoder implements DecodingLayerContainer interface. +func (dl DecodingLayerArray) LayersDecoder(first LayerType, df DecodeFeedback) DecodingLayerFunc { + return LayersDecoder(dl, first, df) +} + +// DecodingLayerMap is an map-based implementation of +// DecodingLayerContainer. Each DecodingLayer is searched in a map +// hashed by LayerType value. +type DecodingLayerMap map[LayerType]DecodingLayer + +// Put implements DecodingLayerContainer interface. +func (dl DecodingLayerMap) Put(d DecodingLayer) DecodingLayerContainer { + for _, typ := range d.CanDecode().LayerTypes() { + if dl == nil { + dl = make(map[LayerType]DecodingLayer) + } + dl[typ] = d + } + return dl +} + +// Decoder implements DecodingLayerContainer interface. +func (dl DecodingLayerMap) Decoder(typ LayerType) (DecodingLayer, bool) { + d, ok := dl[typ] + return d, ok +} + +// LayersDecoder implements DecodingLayerContainer interface. +func (dl DecodingLayerMap) LayersDecoder(first LayerType, df DecodeFeedback) DecodingLayerFunc { + return LayersDecoder(dl, first, df) +} + +// Static code check. +var ( + _ = []DecodingLayerContainer{ + DecodingLayerSparse(nil), + DecodingLayerMap(nil), + DecodingLayerArray(nil), + } +) + +// DecodingLayerParser parses a given set of layer types. See DecodeLayers for +// more information on how DecodingLayerParser should be used. +type DecodingLayerParser struct { + // DecodingLayerParserOptions is the set of options available to the + // user to define the parser's behavior. + DecodingLayerParserOptions + dlc DecodingLayerContainer + first LayerType + df DecodeFeedback + + decodeFunc DecodingLayerFunc + + // Truncated is set when a decode layer detects that the packet has been + // truncated. + Truncated bool +} + +// AddDecodingLayer adds a decoding layer to the parser. This adds support for +// the decoding layer's CanDecode layers to the parser... should they be +// encountered, they'll be parsed. +func (l *DecodingLayerParser) AddDecodingLayer(d DecodingLayer) { + l.SetDecodingLayerContainer(l.dlc.Put(d)) +} + +// SetTruncated is used by DecodingLayers to set the Truncated boolean in the +// DecodingLayerParser. Users should simply read Truncated after calling +// DecodeLayers. +func (l *DecodingLayerParser) SetTruncated() { + l.Truncated = true +} + +// NewDecodingLayerParser creates a new DecodingLayerParser and adds in all +// of the given DecodingLayers with AddDecodingLayer. +// +// Each call to DecodeLayers will attempt to decode the given bytes first by +// treating them as a 'first'-type layer, then by using NextLayerType on +// subsequently decoded layers to find the next relevant decoder. Should a +// deoder not be available for the layer type returned by NextLayerType, +// decoding will stop. +// +// NewDecodingLayerParser uses DecodingLayerMap container by +// default. +func NewDecodingLayerParser(first LayerType, decoders ...DecodingLayer) *DecodingLayerParser { + dlp := &DecodingLayerParser{first: first} + dlp.df = dlp // Cast this once to the interface + // default container + dlc := DecodingLayerContainer(DecodingLayerMap(make(map[LayerType]DecodingLayer))) + for _, d := range decoders { + dlc = dlc.Put(d) + } + + dlp.SetDecodingLayerContainer(dlc) + return dlp +} + +// SetDecodingLayerContainer specifies container with decoders. This +// call replaces all decoders already registered in given instance of +// DecodingLayerParser. +func (l *DecodingLayerParser) SetDecodingLayerContainer(dlc DecodingLayerContainer) { + l.dlc = dlc + l.decodeFunc = l.dlc.LayersDecoder(l.first, l.df) +} + +// DecodeLayers decodes as many layers as possible from the given data. It +// initially treats the data as layer type 'typ', then uses NextLayerType on +// each subsequent decoded layer until it gets to a layer type it doesn't know +// how to parse. +// +// For each layer successfully decoded, DecodeLayers appends the layer type to +// the decoded slice. DecodeLayers truncates the 'decoded' slice initially, so +// there's no need to empty it yourself. +// +// This decoding method is about an order of magnitude faster than packet +// decoding, because it only decodes known layers that have already been +// allocated. This means it doesn't need to allocate each layer it returns... +// instead it overwrites the layers that already exist. +// +// Example usage: +// func main() { +// var eth layers.Ethernet +// var ip4 layers.IPv4 +// var ip6 layers.IPv6 +// var tcp layers.TCP +// var udp layers.UDP +// var payload gopacket.Payload +// parser := gopacket.NewDecodingLayerParser(layers.LayerTypeEthernet, ð, &ip4, &ip6, &tcp, &udp, &payload) +// var source gopacket.PacketDataSource = getMyDataSource() +// decodedLayers := make([]gopacket.LayerType, 0, 10) +// for { +// data, _, err := source.ReadPacketData() +// if err != nil { +// fmt.Println("Error reading packet data: ", err) +// continue +// } +// fmt.Println("Decoding packet") +// err = parser.DecodeLayers(data, &decodedLayers) +// for _, typ := range decodedLayers { +// fmt.Println(" Successfully decoded layer type", typ) +// switch typ { +// case layers.LayerTypeEthernet: +// fmt.Println(" Eth ", eth.SrcMAC, eth.DstMAC) +// case layers.LayerTypeIPv4: +// fmt.Println(" IP4 ", ip4.SrcIP, ip4.DstIP) +// case layers.LayerTypeIPv6: +// fmt.Println(" IP6 ", ip6.SrcIP, ip6.DstIP) +// case layers.LayerTypeTCP: +// fmt.Println(" TCP ", tcp.SrcPort, tcp.DstPort) +// case layers.LayerTypeUDP: +// fmt.Println(" UDP ", udp.SrcPort, udp.DstPort) +// } +// } +// if decodedLayers.Truncated { +// fmt.Println(" Packet has been truncated") +// } +// if err != nil { +// fmt.Println(" Error encountered:", err) +// } +// } +// } +// +// If DecodeLayers is unable to decode the next layer type, it will return the +// error UnsupportedLayerType. +func (l *DecodingLayerParser) DecodeLayers(data []byte, decoded *[]LayerType) (err error) { + l.Truncated = false + if !l.IgnorePanic { + defer panicToError(&err) + } + typ, err := l.decodeFunc(data, decoded) + if typ != LayerTypeZero { + // no decoder + if l.IgnoreUnsupported { + return nil + } + return UnsupportedLayerType(typ) + } + return err +} + +// UnsupportedLayerType is returned by DecodingLayerParser if DecodeLayers +// encounters a layer type that the DecodingLayerParser has no decoder for. +type UnsupportedLayerType LayerType + +// Error implements the error interface, returning a string to say that the +// given layer type is unsupported. +func (e UnsupportedLayerType) Error() string { + return fmt.Sprintf("No decoder for layer type %v", LayerType(e)) +} + +func panicToError(e *error) { + if r := recover(); r != nil { + *e = fmt.Errorf("panic: %v", r) + } +} + +// DecodingLayerParserOptions provides options to affect the behavior of a given +// DecodingLayerParser. +type DecodingLayerParserOptions struct { + // IgnorePanic determines whether a DecodingLayerParser should stop + // panics on its own (by returning them as an error from DecodeLayers) + // or should allow them to raise up the stack. Handling errors does add + // latency to the process of decoding layers, but is much safer for + // callers. IgnorePanic defaults to false, thus if the caller does + // nothing decode panics will be returned as errors. + IgnorePanic bool + // IgnoreUnsupported will stop parsing and return a nil error when it + // encounters a layer it doesn't have a parser for, instead of returning an + // UnsupportedLayerType error. If this is true, it's up to the caller to make + // sure that all expected layers have been parsed (by checking the decoded + // slice). + IgnoreUnsupported bool +} diff --git a/backend/vendor/github.com/google/gopacket/time.go b/backend/vendor/github.com/google/gopacket/time.go new file mode 100644 index 0000000..6d116cd --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/time.go @@ -0,0 +1,72 @@ +// Copyright 2018 The GoPacket Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package gopacket + +import ( + "fmt" + "math" + "time" +) + +// TimestampResolution represents the resolution of timestamps in Base^Exponent. +type TimestampResolution struct { + Base, Exponent int +} + +func (t TimestampResolution) String() string { + return fmt.Sprintf("%d^%d", t.Base, t.Exponent) +} + +// ToDuration returns the smallest representable time difference as a time.Duration +func (t TimestampResolution) ToDuration() time.Duration { + if t.Base == 0 { + return 0 + } + if t.Exponent == 0 { + return time.Second + } + switch t.Base { + case 10: + return time.Duration(math.Pow10(t.Exponent + 9)) + case 2: + if t.Exponent < 0 { + return time.Second >> uint(-t.Exponent) + } + return time.Second << uint(t.Exponent) + default: + // this might loose precision + return time.Duration(float64(time.Second) * math.Pow(float64(t.Base), float64(t.Exponent))) + } +} + +// TimestampResolutionInvalid represents an invalid timestamp resolution +var TimestampResolutionInvalid = TimestampResolution{} + +// TimestampResolutionMillisecond is a resolution of 10^-3s +var TimestampResolutionMillisecond = TimestampResolution{10, -3} + +// TimestampResolutionMicrosecond is a resolution of 10^-6s +var TimestampResolutionMicrosecond = TimestampResolution{10, -6} + +// TimestampResolutionNanosecond is a resolution of 10^-9s +var TimestampResolutionNanosecond = TimestampResolution{10, -9} + +// TimestampResolutionNTP is the resolution of NTP timestamps which is 2^-32 ≈ 233 picoseconds +var TimestampResolutionNTP = TimestampResolution{2, -32} + +// TimestampResolutionCaptureInfo is the resolution used in CaptureInfo, which his currently nanosecond +var TimestampResolutionCaptureInfo = TimestampResolutionNanosecond + +// PacketSourceResolution is an interface for packet data sources that +// support reporting the timestamp resolution of the aqcuired timestamps. +// Returned timestamps will always have NanosecondTimestampResolution due +// to the use of time.Time, but scaling might have occured if acquired +// timestamps have a different resolution. +type PacketSourceResolution interface { + // Resolution returns the timestamp resolution of acquired timestamps before scaling to NanosecondTimestampResolution. + Resolution() TimestampResolution +} diff --git a/backend/vendor/github.com/google/gopacket/writer.go b/backend/vendor/github.com/google/gopacket/writer.go new file mode 100644 index 0000000..5d303dc --- /dev/null +++ b/backend/vendor/github.com/google/gopacket/writer.go @@ -0,0 +1,232 @@ +// Copyright 2012 Google, Inc. All rights reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the LICENSE file in the root of the source +// tree. + +package gopacket + +import ( + "fmt" +) + +// SerializableLayer allows its implementations to be written out as a set of bytes, +// so those bytes may be sent on the wire or otherwise used by the caller. +// SerializableLayer is implemented by certain Layer types, and can be encoded to +// bytes using the LayerWriter object. +type SerializableLayer interface { + // SerializeTo writes this layer to a slice, growing that slice if necessary + // to make it fit the layer's data. + // Args: + // b: SerializeBuffer to write this layer on to. When called, b.Bytes() + // is the payload this layer should wrap, if any. Note that this + // layer can either prepend itself (common), append itself + // (uncommon), or both (sometimes padding or footers are required at + // the end of packet data). It's also possible (though probably very + // rarely needed) to overwrite any bytes in the current payload. + // After this call, b.Bytes() should return the byte encoding of + // this layer wrapping the original b.Bytes() payload. + // opts: options to use while writing out data. + // Returns: + // error if a problem was encountered during encoding. If an error is + // returned, the bytes in data should be considered invalidated, and + // not used. + // + // SerializeTo calls SHOULD entirely ignore LayerContents and + // LayerPayload. It just serializes based on struct fields, neither + // modifying nor using contents/payload. + SerializeTo(b SerializeBuffer, opts SerializeOptions) error + // LayerType returns the type of the layer that is being serialized to the buffer + LayerType() LayerType +} + +// SerializeOptions provides options for behaviors that SerializableLayers may want to +// implement. +type SerializeOptions struct { + // FixLengths determines whether, during serialization, layers should fix + // the values for any length field that depends on the payload. + FixLengths bool + // ComputeChecksums determines whether, during serialization, layers + // should recompute checksums based on their payloads. + ComputeChecksums bool +} + +// SerializeBuffer is a helper used by gopacket for writing out packet layers. +// SerializeBuffer starts off as an empty []byte. Subsequent calls to PrependBytes +// return byte slices before the current Bytes(), AppendBytes returns byte +// slices after. +// +// Byte slices returned by PrependBytes/AppendBytes are NOT zero'd out, so if +// you want to make sure they're all zeros, set them as such. +// +// SerializeBuffer is specifically designed to handle packet writing, where unlike +// with normal writes it's easier to start writing at the inner-most layer and +// work out, meaning that we often need to prepend bytes. This runs counter to +// typical writes to byte slices using append(), where we only write at the end +// of the buffer. +// +// It can be reused via Clear. Note, however, that a Clear call will invalidate the +// byte slices returned by any previous Bytes() call (the same buffer is +// reused). +// +// 1) Reusing a write buffer is generally much faster than creating a new one, +// and with the default implementation it avoids additional memory allocations. +// 2) If a byte slice from a previous Bytes() call will continue to be used, +// it's better to create a new SerializeBuffer. +// +// The Clear method is specifically designed to minimize memory allocations for +// similar later workloads on the SerializeBuffer. IE: if you make a set of +// Prepend/Append calls, then clear, then make the same calls with the same +// sizes, the second round (and all future similar rounds) shouldn't allocate +// any new memory. +type SerializeBuffer interface { + // Bytes returns the contiguous set of bytes collected so far by Prepend/Append + // calls. The slice returned by Bytes will be modified by future Clear calls, + // so if you're planning on clearing this SerializeBuffer, you may want to copy + // Bytes somewhere safe first. + Bytes() []byte + // PrependBytes returns a set of bytes which prepends the current bytes in this + // buffer. These bytes start in an indeterminate state, so they should be + // overwritten by the caller. The caller must only call PrependBytes if they + // know they're going to immediately overwrite all bytes returned. + PrependBytes(num int) ([]byte, error) + // AppendBytes returns a set of bytes which appends the current bytes in this + // buffer. These bytes start in an indeterminate state, so they should be + // overwritten by the caller. The caller must only call AppendBytes if they + // know they're going to immediately overwrite all bytes returned. + AppendBytes(num int) ([]byte, error) + // Clear resets the SerializeBuffer to a new, empty buffer. After a call to clear, + // the byte slice returned by any previous call to Bytes() for this buffer + // should be considered invalidated. + Clear() error + // Layers returns all the Layers that have been successfully serialized into this buffer + // already. + Layers() []LayerType + // PushLayer adds the current Layer to the list of Layers that have been serialized + // into this buffer. + PushLayer(LayerType) +} + +type serializeBuffer struct { + data []byte + start int + prepended, appended int + layers []LayerType +} + +// NewSerializeBuffer creates a new instance of the default implementation of +// the SerializeBuffer interface. +func NewSerializeBuffer() SerializeBuffer { + return &serializeBuffer{} +} + +// NewSerializeBufferExpectedSize creates a new buffer for serialization, optimized for an +// expected number of bytes prepended/appended. This tends to decrease the +// number of memory allocations made by the buffer during writes. +func NewSerializeBufferExpectedSize(expectedPrependLength, expectedAppendLength int) SerializeBuffer { + return &serializeBuffer{ + data: make([]byte, expectedPrependLength, expectedPrependLength+expectedAppendLength), + start: expectedPrependLength, + prepended: expectedPrependLength, + appended: expectedAppendLength, + } +} + +func (w *serializeBuffer) Bytes() []byte { + return w.data[w.start:] +} + +func (w *serializeBuffer) PrependBytes(num int) ([]byte, error) { + if num < 0 { + panic("num < 0") + } + if w.start < num { + toPrepend := w.prepended + if toPrepend < num { + toPrepend = num + } + w.prepended += toPrepend + length := cap(w.data) + toPrepend + newData := make([]byte, length) + newStart := w.start + toPrepend + copy(newData[newStart:], w.data[w.start:]) + w.start = newStart + w.data = newData[:toPrepend+len(w.data)] + } + w.start -= num + return w.data[w.start : w.start+num], nil +} + +func (w *serializeBuffer) AppendBytes(num int) ([]byte, error) { + if num < 0 { + panic("num < 0") + } + initialLength := len(w.data) + if cap(w.data)-initialLength < num { + toAppend := w.appended + if toAppend < num { + toAppend = num + } + w.appended += toAppend + newData := make([]byte, cap(w.data)+toAppend) + copy(newData[w.start:], w.data[w.start:]) + w.data = newData[:initialLength] + } + // Grow the buffer. We know it'll be under capacity given above. + w.data = w.data[:initialLength+num] + return w.data[initialLength:], nil +} + +func (w *serializeBuffer) Clear() error { + w.start = w.prepended + w.data = w.data[:w.start] + w.layers = w.layers[:0] + return nil +} + +func (w *serializeBuffer) Layers() []LayerType { + return w.layers +} + +func (w *serializeBuffer) PushLayer(l LayerType) { + w.layers = append(w.layers, l) +} + +// SerializeLayers clears the given write buffer, then writes all layers into it so +// they correctly wrap each other. Note that by clearing the buffer, it +// invalidates all slices previously returned by w.Bytes() +// +// Example: +// buf := gopacket.NewSerializeBuffer() +// opts := gopacket.SerializeOptions{} +// gopacket.SerializeLayers(buf, opts, a, b, c) +// firstPayload := buf.Bytes() // contains byte representation of a(b(c)) +// gopacket.SerializeLayers(buf, opts, d, e, f) +// secondPayload := buf.Bytes() // contains byte representation of d(e(f)). firstPayload is now invalidated, since the SerializeLayers call Clears buf. +func SerializeLayers(w SerializeBuffer, opts SerializeOptions, layers ...SerializableLayer) error { + w.Clear() + for i := len(layers) - 1; i >= 0; i-- { + layer := layers[i] + err := layer.SerializeTo(w, opts) + if err != nil { + return err + } + w.PushLayer(layer.LayerType()) + } + return nil +} + +// SerializePacket is a convenience function that calls SerializeLayers +// on packet's Layers(). +// It returns an error if one of the packet layers is not a SerializableLayer. +func SerializePacket(buf SerializeBuffer, opts SerializeOptions, packet Packet) error { + sls := []SerializableLayer{} + for _, layer := range packet.Layers() { + sl, ok := layer.(SerializableLayer) + if !ok { + return fmt.Errorf("layer %s is not serializable", layer.LayerType().String()) + } + sls = append(sls, sl) + } + return SerializeLayers(buf, opts, sls...) +} diff --git a/backend/vendor/github.com/google/pprof/AUTHORS b/backend/vendor/github.com/google/pprof/AUTHORS new file mode 100644 index 0000000..fd736cb --- /dev/null +++ b/backend/vendor/github.com/google/pprof/AUTHORS @@ -0,0 +1,7 @@ +# This is the official list of pprof authors for copyright purposes. +# This file is distinct from the CONTRIBUTORS files. +# See the latter for an explanation. +# Names should be added to this file as: +# Name or Organization +# The email address is not required for organizations. +Google Inc. \ No newline at end of file diff --git a/backend/vendor/github.com/google/pprof/CONTRIBUTORS b/backend/vendor/github.com/google/pprof/CONTRIBUTORS new file mode 100644 index 0000000..8c8c37d --- /dev/null +++ b/backend/vendor/github.com/google/pprof/CONTRIBUTORS @@ -0,0 +1,16 @@ +# People who have agreed to one of the CLAs and can contribute patches. +# The AUTHORS file lists the copyright holders; this file +# lists people. For example, Google employees are listed here +# but not in AUTHORS, because Google holds the copyright. +# +# https://developers.google.com/open-source/cla/individual +# https://developers.google.com/open-source/cla/corporate +# +# Names should be added to this file as: +# Name +Raul Silvera +Tipp Moseley +Hyoun Kyu Cho +Martin Spier +Taco de Wolff +Andrew Hunter diff --git a/backend/vendor/github.com/google/pprof/LICENSE b/backend/vendor/github.com/google/pprof/LICENSE new file mode 100644 index 0000000..d645695 --- /dev/null +++ b/backend/vendor/github.com/google/pprof/LICENSE @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. For the purposes of this definition, + "control" means (i) the power, direct or indirect, to cause the + direction or management of such entity, whether by contract or + otherwise, or (ii) ownership of fifty percent (50%) or more of the + outstanding shares, or (iii) beneficial ownership of such entity. + + "You" (or "Your") shall mean an individual or Legal Entity + exercising permissions granted by this License. + + "Source" form shall mean the preferred form for making modifications, + including but not limited to software source code, documentation + source, and configuration files. + + "Object" form shall mean any form resulting from mechanical + transformation or translation of a Source form, including but + not limited to compiled object code, generated documentation, + and conversions to other media types. + + "Work" shall mean the work of authorship, whether in Source or + Object form, made available under the License, as indicated by a + copyright notice that is included in or attached to the work + (an example is provided in the Appendix below). + + "Derivative Works" shall mean any work, whether in Source or Object + form, that is based on (or derived from) the Work and for which the + editorial revisions, annotations, elaborations, or other modifications + represent, as a whole, an original work of authorship. For the purposes + of this License, Derivative Works shall not include works that remain + separable from, or merely link (or bind by name) to the interfaces of, + the Work and Derivative Works thereof. + + "Contribution" shall mean any work of authorship, including + the original version of the Work and any modifications or additions + to that Work or Derivative Works thereof, that is intentionally + submitted to Licensor for inclusion in the Work by the copyright owner + or by an individual or Legal Entity authorized to submit on behalf of + the copyright owner. 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The contents + of the NOTICE file are for informational purposes only and + do not modify the License. You may add Your own attribution + notices within Derivative Works that You distribute, alongside + or as an addendum to the NOTICE text from the Work, provided + that such additional attribution notices cannot be construed + as modifying the License. + + You may add Your own copyright statement to Your modifications and + may provide additional or different license terms and conditions + for use, reproduction, or distribution of Your modifications, or + for any such Derivative Works as a whole, provided Your use, + reproduction, and distribution of the Work otherwise complies with + the conditions stated in this License. + + 5. Submission of Contributions. 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In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + APPENDIX: How to apply the Apache License to your work. + + To apply the Apache License to your work, attach the following + boilerplate notice, with the fields enclosed by brackets "[]" + replaced with your own identifying information. (Don't include + the brackets!) The text should be enclosed in the appropriate + comment syntax for the file format. We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/backend/vendor/github.com/google/pprof/profile/encode.go b/backend/vendor/github.com/google/pprof/profile/encode.go new file mode 100644 index 0000000..8ce9d3c --- /dev/null +++ b/backend/vendor/github.com/google/pprof/profile/encode.go @@ -0,0 +1,596 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package profile + +import ( + "errors" + "sort" + "strings" +) + +func (p *Profile) decoder() []decoder { + return profileDecoder +} + +// preEncode populates the unexported fields to be used by encode +// (with suffix X) from the corresponding exported fields. The +// exported fields are cleared up to facilitate testing. +func (p *Profile) preEncode() { + strings := make(map[string]int) + addString(strings, "") + + for _, st := range p.SampleType { + st.typeX = addString(strings, st.Type) + st.unitX = addString(strings, st.Unit) + } + + for _, s := range p.Sample { + s.labelX = nil + var keys []string + for k := range s.Label { + keys = append(keys, k) + } + sort.Strings(keys) + for _, k := range keys { + vs := s.Label[k] + for _, v := range vs { + s.labelX = append(s.labelX, + label{ + keyX: addString(strings, k), + strX: addString(strings, v), + }, + ) + } + } + var numKeys []string + for k := range s.NumLabel { + numKeys = append(numKeys, k) + } + sort.Strings(numKeys) + for _, k := range numKeys { + keyX := addString(strings, k) + vs := s.NumLabel[k] + units := s.NumUnit[k] + for i, v := range vs { + var unitX int64 + if len(units) != 0 { + unitX = addString(strings, units[i]) + } + s.labelX = append(s.labelX, + label{ + keyX: keyX, + numX: v, + unitX: unitX, + }, + ) + } + } + s.locationIDX = make([]uint64, len(s.Location)) + for i, loc := range s.Location { + s.locationIDX[i] = loc.ID + } + } + + for _, m := range p.Mapping { + m.fileX = addString(strings, m.File) + m.buildIDX = addString(strings, m.BuildID) + } + + for _, l := range p.Location { + for i, ln := range l.Line { + if ln.Function != nil { + l.Line[i].functionIDX = ln.Function.ID + } else { + l.Line[i].functionIDX = 0 + } + } + if l.Mapping != nil { + l.mappingIDX = l.Mapping.ID + } else { + l.mappingIDX = 0 + } + } + for _, f := range p.Function { + f.nameX = addString(strings, f.Name) + f.systemNameX = addString(strings, f.SystemName) + f.filenameX = addString(strings, f.Filename) + } + + p.dropFramesX = addString(strings, p.DropFrames) + p.keepFramesX = addString(strings, p.KeepFrames) + + if pt := p.PeriodType; pt != nil { + pt.typeX = addString(strings, pt.Type) + pt.unitX = addString(strings, pt.Unit) + } + + p.commentX = nil + for _, c := range p.Comments { + p.commentX = append(p.commentX, addString(strings, c)) + } + + p.defaultSampleTypeX = addString(strings, p.DefaultSampleType) + p.docURLX = addString(strings, p.DocURL) + + p.stringTable = make([]string, len(strings)) + for s, i := range strings { + p.stringTable[i] = s + } +} + +func (p *Profile) encode(b *buffer) { + for _, x := range p.SampleType { + encodeMessage(b, 1, x) + } + for _, x := range p.Sample { + encodeMessage(b, 2, x) + } + for _, x := range p.Mapping { + encodeMessage(b, 3, x) + } + for _, x := range p.Location { + encodeMessage(b, 4, x) + } + for _, x := range p.Function { + encodeMessage(b, 5, x) + } + encodeStrings(b, 6, p.stringTable) + encodeInt64Opt(b, 7, p.dropFramesX) + encodeInt64Opt(b, 8, p.keepFramesX) + encodeInt64Opt(b, 9, p.TimeNanos) + encodeInt64Opt(b, 10, p.DurationNanos) + if pt := p.PeriodType; pt != nil && (pt.typeX != 0 || pt.unitX != 0) { + encodeMessage(b, 11, p.PeriodType) + } + encodeInt64Opt(b, 12, p.Period) + encodeInt64s(b, 13, p.commentX) + encodeInt64(b, 14, p.defaultSampleTypeX) + encodeInt64Opt(b, 15, p.docURLX) +} + +var profileDecoder = []decoder{ + nil, // 0 + // repeated ValueType sample_type = 1 + func(b *buffer, m message) error { + x := new(ValueType) + pp := m.(*Profile) + pp.SampleType = append(pp.SampleType, x) + return decodeMessage(b, x) + }, + // repeated Sample sample = 2 + func(b *buffer, m message) error { + x := new(Sample) + pp := m.(*Profile) + pp.Sample = append(pp.Sample, x) + return decodeMessage(b, x) + }, + // repeated Mapping mapping = 3 + func(b *buffer, m message) error { + x := new(Mapping) + pp := m.(*Profile) + pp.Mapping = append(pp.Mapping, x) + return decodeMessage(b, x) + }, + // repeated Location location = 4 + func(b *buffer, m message) error { + x := new(Location) + x.Line = b.tmpLines[:0] // Use shared space temporarily + pp := m.(*Profile) + pp.Location = append(pp.Location, x) + err := decodeMessage(b, x) + b.tmpLines = x.Line[:0] + // Copy to shrink size and detach from shared space. + x.Line = append([]Line(nil), x.Line...) + return err + }, + // repeated Function function = 5 + func(b *buffer, m message) error { + x := new(Function) + pp := m.(*Profile) + pp.Function = append(pp.Function, x) + return decodeMessage(b, x) + }, + // repeated string string_table = 6 + func(b *buffer, m message) error { + err := decodeStrings(b, &m.(*Profile).stringTable) + if err != nil { + return err + } + if m.(*Profile).stringTable[0] != "" { + return errors.New("string_table[0] must be ''") + } + return nil + }, + // int64 drop_frames = 7 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*Profile).dropFramesX) }, + // int64 keep_frames = 8 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*Profile).keepFramesX) }, + // int64 time_nanos = 9 + func(b *buffer, m message) error { + if m.(*Profile).TimeNanos != 0 { + return errConcatProfile + } + return decodeInt64(b, &m.(*Profile).TimeNanos) + }, + // int64 duration_nanos = 10 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*Profile).DurationNanos) }, + // ValueType period_type = 11 + func(b *buffer, m message) error { + x := new(ValueType) + pp := m.(*Profile) + pp.PeriodType = x + return decodeMessage(b, x) + }, + // int64 period = 12 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*Profile).Period) }, + // repeated int64 comment = 13 + func(b *buffer, m message) error { return decodeInt64s(b, &m.(*Profile).commentX) }, + // int64 defaultSampleType = 14 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*Profile).defaultSampleTypeX) }, + // string doc_link = 15; + func(b *buffer, m message) error { return decodeInt64(b, &m.(*Profile).docURLX) }, +} + +// postDecode takes the unexported fields populated by decode (with +// suffix X) and populates the corresponding exported fields. +// The unexported fields are cleared up to facilitate testing. +func (p *Profile) postDecode() error { + var err error + mappings := make(map[uint64]*Mapping, len(p.Mapping)) + mappingIds := make([]*Mapping, len(p.Mapping)+1) + for _, m := range p.Mapping { + m.File, err = getString(p.stringTable, &m.fileX, err) + m.BuildID, err = getString(p.stringTable, &m.buildIDX, err) + if m.ID < uint64(len(mappingIds)) { + mappingIds[m.ID] = m + } else { + mappings[m.ID] = m + } + + // If this a main linux kernel mapping with a relocation symbol suffix + // ("[kernel.kallsyms]_text"), extract said suffix. + // It is fairly hacky to handle at this level, but the alternatives appear even worse. + const prefix = "[kernel.kallsyms]" + if strings.HasPrefix(m.File, prefix) { + m.KernelRelocationSymbol = m.File[len(prefix):] + } + } + + functions := make(map[uint64]*Function, len(p.Function)) + functionIds := make([]*Function, len(p.Function)+1) + for _, f := range p.Function { + f.Name, err = getString(p.stringTable, &f.nameX, err) + f.SystemName, err = getString(p.stringTable, &f.systemNameX, err) + f.Filename, err = getString(p.stringTable, &f.filenameX, err) + if f.ID < uint64(len(functionIds)) { + functionIds[f.ID] = f + } else { + functions[f.ID] = f + } + } + + locations := make(map[uint64]*Location, len(p.Location)) + locationIds := make([]*Location, len(p.Location)+1) + for _, l := range p.Location { + if id := l.mappingIDX; id < uint64(len(mappingIds)) { + l.Mapping = mappingIds[id] + } else { + l.Mapping = mappings[id] + } + l.mappingIDX = 0 + for i, ln := range l.Line { + if id := ln.functionIDX; id != 0 { + l.Line[i].functionIDX = 0 + if id < uint64(len(functionIds)) { + l.Line[i].Function = functionIds[id] + } else { + l.Line[i].Function = functions[id] + } + } + } + if l.ID < uint64(len(locationIds)) { + locationIds[l.ID] = l + } else { + locations[l.ID] = l + } + } + + for _, st := range p.SampleType { + st.Type, err = getString(p.stringTable, &st.typeX, err) + st.Unit, err = getString(p.stringTable, &st.unitX, err) + } + + // Pre-allocate space for all locations. + numLocations := 0 + for _, s := range p.Sample { + numLocations += len(s.locationIDX) + } + locBuffer := make([]*Location, numLocations) + + for _, s := range p.Sample { + if len(s.labelX) > 0 { + labels := make(map[string][]string, len(s.labelX)) + numLabels := make(map[string][]int64, len(s.labelX)) + numUnits := make(map[string][]string, len(s.labelX)) + for _, l := range s.labelX { + var key, value string + key, err = getString(p.stringTable, &l.keyX, err) + if l.strX != 0 { + value, err = getString(p.stringTable, &l.strX, err) + labels[key] = append(labels[key], value) + } else if l.numX != 0 || l.unitX != 0 { + numValues := numLabels[key] + units := numUnits[key] + if l.unitX != 0 { + var unit string + unit, err = getString(p.stringTable, &l.unitX, err) + units = padStringArray(units, len(numValues)) + numUnits[key] = append(units, unit) + } + numLabels[key] = append(numLabels[key], l.numX) + } + } + if len(labels) > 0 { + s.Label = labels + } + if len(numLabels) > 0 { + s.NumLabel = numLabels + for key, units := range numUnits { + if len(units) > 0 { + numUnits[key] = padStringArray(units, len(numLabels[key])) + } + } + s.NumUnit = numUnits + } + } + + s.Location = locBuffer[:len(s.locationIDX)] + locBuffer = locBuffer[len(s.locationIDX):] + for i, lid := range s.locationIDX { + if lid < uint64(len(locationIds)) { + s.Location[i] = locationIds[lid] + } else { + s.Location[i] = locations[lid] + } + } + s.locationIDX = nil + } + + p.DropFrames, err = getString(p.stringTable, &p.dropFramesX, err) + p.KeepFrames, err = getString(p.stringTable, &p.keepFramesX, err) + + if pt := p.PeriodType; pt == nil { + p.PeriodType = &ValueType{} + } + + if pt := p.PeriodType; pt != nil { + pt.Type, err = getString(p.stringTable, &pt.typeX, err) + pt.Unit, err = getString(p.stringTable, &pt.unitX, err) + } + + for _, i := range p.commentX { + var c string + c, err = getString(p.stringTable, &i, err) + p.Comments = append(p.Comments, c) + } + + p.commentX = nil + p.DefaultSampleType, err = getString(p.stringTable, &p.defaultSampleTypeX, err) + p.DocURL, err = getString(p.stringTable, &p.docURLX, err) + p.stringTable = nil + return err +} + +// padStringArray pads arr with enough empty strings to make arr +// length l when arr's length is less than l. +func padStringArray(arr []string, l int) []string { + if l <= len(arr) { + return arr + } + return append(arr, make([]string, l-len(arr))...) +} + +func (p *ValueType) decoder() []decoder { + return valueTypeDecoder +} + +func (p *ValueType) encode(b *buffer) { + encodeInt64Opt(b, 1, p.typeX) + encodeInt64Opt(b, 2, p.unitX) +} + +var valueTypeDecoder = []decoder{ + nil, // 0 + // optional int64 type = 1 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*ValueType).typeX) }, + // optional int64 unit = 2 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*ValueType).unitX) }, +} + +func (p *Sample) decoder() []decoder { + return sampleDecoder +} + +func (p *Sample) encode(b *buffer) { + encodeUint64s(b, 1, p.locationIDX) + encodeInt64s(b, 2, p.Value) + for _, x := range p.labelX { + encodeMessage(b, 3, x) + } +} + +var sampleDecoder = []decoder{ + nil, // 0 + // repeated uint64 location = 1 + func(b *buffer, m message) error { return decodeUint64s(b, &m.(*Sample).locationIDX) }, + // repeated int64 value = 2 + func(b *buffer, m message) error { return decodeInt64s(b, &m.(*Sample).Value) }, + // repeated Label label = 3 + func(b *buffer, m message) error { + s := m.(*Sample) + n := len(s.labelX) + s.labelX = append(s.labelX, label{}) + return decodeMessage(b, &s.labelX[n]) + }, +} + +func (p label) decoder() []decoder { + return labelDecoder +} + +func (p label) encode(b *buffer) { + encodeInt64Opt(b, 1, p.keyX) + encodeInt64Opt(b, 2, p.strX) + encodeInt64Opt(b, 3, p.numX) + encodeInt64Opt(b, 4, p.unitX) +} + +var labelDecoder = []decoder{ + nil, // 0 + // optional int64 key = 1 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*label).keyX) }, + // optional int64 str = 2 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*label).strX) }, + // optional int64 num = 3 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*label).numX) }, + // optional int64 num = 4 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*label).unitX) }, +} + +func (p *Mapping) decoder() []decoder { + return mappingDecoder +} + +func (p *Mapping) encode(b *buffer) { + encodeUint64Opt(b, 1, p.ID) + encodeUint64Opt(b, 2, p.Start) + encodeUint64Opt(b, 3, p.Limit) + encodeUint64Opt(b, 4, p.Offset) + encodeInt64Opt(b, 5, p.fileX) + encodeInt64Opt(b, 6, p.buildIDX) + encodeBoolOpt(b, 7, p.HasFunctions) + encodeBoolOpt(b, 8, p.HasFilenames) + encodeBoolOpt(b, 9, p.HasLineNumbers) + encodeBoolOpt(b, 10, p.HasInlineFrames) +} + +var mappingDecoder = []decoder{ + nil, // 0 + func(b *buffer, m message) error { return decodeUint64(b, &m.(*Mapping).ID) }, // optional uint64 id = 1 + func(b *buffer, m message) error { return decodeUint64(b, &m.(*Mapping).Start) }, // optional uint64 memory_offset = 2 + func(b *buffer, m message) error { return decodeUint64(b, &m.(*Mapping).Limit) }, // optional uint64 memory_limit = 3 + func(b *buffer, m message) error { return decodeUint64(b, &m.(*Mapping).Offset) }, // optional uint64 file_offset = 4 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*Mapping).fileX) }, // optional int64 filename = 5 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*Mapping).buildIDX) }, // optional int64 build_id = 6 + func(b *buffer, m message) error { return decodeBool(b, &m.(*Mapping).HasFunctions) }, // optional bool has_functions = 7 + func(b *buffer, m message) error { return decodeBool(b, &m.(*Mapping).HasFilenames) }, // optional bool has_filenames = 8 + func(b *buffer, m message) error { return decodeBool(b, &m.(*Mapping).HasLineNumbers) }, // optional bool has_line_numbers = 9 + func(b *buffer, m message) error { return decodeBool(b, &m.(*Mapping).HasInlineFrames) }, // optional bool has_inline_frames = 10 +} + +func (p *Location) decoder() []decoder { + return locationDecoder +} + +func (p *Location) encode(b *buffer) { + encodeUint64Opt(b, 1, p.ID) + encodeUint64Opt(b, 2, p.mappingIDX) + encodeUint64Opt(b, 3, p.Address) + for i := range p.Line { + encodeMessage(b, 4, &p.Line[i]) + } + encodeBoolOpt(b, 5, p.IsFolded) +} + +var locationDecoder = []decoder{ + nil, // 0 + func(b *buffer, m message) error { return decodeUint64(b, &m.(*Location).ID) }, // optional uint64 id = 1; + func(b *buffer, m message) error { return decodeUint64(b, &m.(*Location).mappingIDX) }, // optional uint64 mapping_id = 2; + func(b *buffer, m message) error { return decodeUint64(b, &m.(*Location).Address) }, // optional uint64 address = 3; + func(b *buffer, m message) error { // repeated Line line = 4 + pp := m.(*Location) + n := len(pp.Line) + pp.Line = append(pp.Line, Line{}) + return decodeMessage(b, &pp.Line[n]) + }, + func(b *buffer, m message) error { return decodeBool(b, &m.(*Location).IsFolded) }, // optional bool is_folded = 5; +} + +func (p *Line) decoder() []decoder { + return lineDecoder +} + +func (p *Line) encode(b *buffer) { + encodeUint64Opt(b, 1, p.functionIDX) + encodeInt64Opt(b, 2, p.Line) + encodeInt64Opt(b, 3, p.Column) +} + +var lineDecoder = []decoder{ + nil, // 0 + // optional uint64 function_id = 1 + func(b *buffer, m message) error { return decodeUint64(b, &m.(*Line).functionIDX) }, + // optional int64 line = 2 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*Line).Line) }, + // optional int64 column = 3 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*Line).Column) }, +} + +func (p *Function) decoder() []decoder { + return functionDecoder +} + +func (p *Function) encode(b *buffer) { + encodeUint64Opt(b, 1, p.ID) + encodeInt64Opt(b, 2, p.nameX) + encodeInt64Opt(b, 3, p.systemNameX) + encodeInt64Opt(b, 4, p.filenameX) + encodeInt64Opt(b, 5, p.StartLine) +} + +var functionDecoder = []decoder{ + nil, // 0 + // optional uint64 id = 1 + func(b *buffer, m message) error { return decodeUint64(b, &m.(*Function).ID) }, + // optional int64 function_name = 2 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*Function).nameX) }, + // optional int64 function_system_name = 3 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*Function).systemNameX) }, + // repeated int64 filename = 4 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*Function).filenameX) }, + // optional int64 start_line = 5 + func(b *buffer, m message) error { return decodeInt64(b, &m.(*Function).StartLine) }, +} + +func addString(strings map[string]int, s string) int64 { + i, ok := strings[s] + if !ok { + i = len(strings) + strings[s] = i + } + return int64(i) +} + +func getString(strings []string, strng *int64, err error) (string, error) { + if err != nil { + return "", err + } + s := int(*strng) + if s < 0 || s >= len(strings) { + return "", errMalformed + } + *strng = 0 + return strings[s], nil +} diff --git a/backend/vendor/github.com/google/pprof/profile/filter.go b/backend/vendor/github.com/google/pprof/profile/filter.go new file mode 100644 index 0000000..c794b93 --- /dev/null +++ b/backend/vendor/github.com/google/pprof/profile/filter.go @@ -0,0 +1,274 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package profile + +// Implements methods to filter samples from profiles. + +import "regexp" + +// FilterSamplesByName filters the samples in a profile and only keeps +// samples where at least one frame matches focus but none match ignore. +// Returns true is the corresponding regexp matched at least one sample. +func (p *Profile) FilterSamplesByName(focus, ignore, hide, show *regexp.Regexp) (fm, im, hm, hnm bool) { + if focus == nil && ignore == nil && hide == nil && show == nil { + fm = true // Missing focus implies a match + return + } + focusOrIgnore := make(map[uint64]bool) + hidden := make(map[uint64]bool) + for _, l := range p.Location { + if ignore != nil && l.matchesName(ignore) { + im = true + focusOrIgnore[l.ID] = false + } else if focus == nil || l.matchesName(focus) { + fm = true + focusOrIgnore[l.ID] = true + } + + if hide != nil && l.matchesName(hide) { + hm = true + l.Line = l.unmatchedLines(hide) + if len(l.Line) == 0 { + hidden[l.ID] = true + } + } + if show != nil { + l.Line = l.matchedLines(show) + if len(l.Line) == 0 { + hidden[l.ID] = true + } else { + hnm = true + } + } + } + + s := make([]*Sample, 0, len(p.Sample)) + for _, sample := range p.Sample { + if focusedAndNotIgnored(sample.Location, focusOrIgnore) { + if len(hidden) > 0 { + var locs []*Location + for _, loc := range sample.Location { + if !hidden[loc.ID] { + locs = append(locs, loc) + } + } + if len(locs) == 0 { + // Remove sample with no locations (by not adding it to s). + continue + } + sample.Location = locs + } + s = append(s, sample) + } + } + p.Sample = s + + return +} + +// ShowFrom drops all stack frames above the highest matching frame and returns +// whether a match was found. If showFrom is nil it returns false and does not +// modify the profile. +// +// Example: consider a sample with frames [A, B, C, B], where A is the root. +// ShowFrom(nil) returns false and has frames [A, B, C, B]. +// ShowFrom(A) returns true and has frames [A, B, C, B]. +// ShowFrom(B) returns true and has frames [B, C, B]. +// ShowFrom(C) returns true and has frames [C, B]. +// ShowFrom(D) returns false and drops the sample because no frames remain. +func (p *Profile) ShowFrom(showFrom *regexp.Regexp) (matched bool) { + if showFrom == nil { + return false + } + // showFromLocs stores location IDs that matched ShowFrom. + showFromLocs := make(map[uint64]bool) + // Apply to locations. + for _, loc := range p.Location { + if filterShowFromLocation(loc, showFrom) { + showFromLocs[loc.ID] = true + matched = true + } + } + // For all samples, strip locations after the highest matching one. + s := make([]*Sample, 0, len(p.Sample)) + for _, sample := range p.Sample { + for i := len(sample.Location) - 1; i >= 0; i-- { + if showFromLocs[sample.Location[i].ID] { + sample.Location = sample.Location[:i+1] + s = append(s, sample) + break + } + } + } + p.Sample = s + return matched +} + +// filterShowFromLocation tests a showFrom regex against a location, removes +// lines after the last match and returns whether a match was found. If the +// mapping is matched, then all lines are kept. +func filterShowFromLocation(loc *Location, showFrom *regexp.Regexp) bool { + if m := loc.Mapping; m != nil && showFrom.MatchString(m.File) { + return true + } + if i := loc.lastMatchedLineIndex(showFrom); i >= 0 { + loc.Line = loc.Line[:i+1] + return true + } + return false +} + +// lastMatchedLineIndex returns the index of the last line that matches a regex, +// or -1 if no match is found. +func (loc *Location) lastMatchedLineIndex(re *regexp.Regexp) int { + for i := len(loc.Line) - 1; i >= 0; i-- { + if fn := loc.Line[i].Function; fn != nil { + if re.MatchString(fn.Name) || re.MatchString(fn.Filename) { + return i + } + } + } + return -1 +} + +// FilterTagsByName filters the tags in a profile and only keeps +// tags that match show and not hide. +func (p *Profile) FilterTagsByName(show, hide *regexp.Regexp) (sm, hm bool) { + matchRemove := func(name string) bool { + matchShow := show == nil || show.MatchString(name) + matchHide := hide != nil && hide.MatchString(name) + + if matchShow { + sm = true + } + if matchHide { + hm = true + } + return !matchShow || matchHide + } + for _, s := range p.Sample { + for lab := range s.Label { + if matchRemove(lab) { + delete(s.Label, lab) + } + } + for lab := range s.NumLabel { + if matchRemove(lab) { + delete(s.NumLabel, lab) + } + } + } + return +} + +// matchesName returns whether the location matches the regular +// expression. It checks any available function names, file names, and +// mapping object filename. +func (loc *Location) matchesName(re *regexp.Regexp) bool { + for _, ln := range loc.Line { + if fn := ln.Function; fn != nil { + if re.MatchString(fn.Name) || re.MatchString(fn.Filename) { + return true + } + } + } + if m := loc.Mapping; m != nil && re.MatchString(m.File) { + return true + } + return false +} + +// unmatchedLines returns the lines in the location that do not match +// the regular expression. +func (loc *Location) unmatchedLines(re *regexp.Regexp) []Line { + if m := loc.Mapping; m != nil && re.MatchString(m.File) { + return nil + } + var lines []Line + for _, ln := range loc.Line { + if fn := ln.Function; fn != nil { + if re.MatchString(fn.Name) || re.MatchString(fn.Filename) { + continue + } + } + lines = append(lines, ln) + } + return lines +} + +// matchedLines returns the lines in the location that match +// the regular expression. +func (loc *Location) matchedLines(re *regexp.Regexp) []Line { + if m := loc.Mapping; m != nil && re.MatchString(m.File) { + return loc.Line + } + var lines []Line + for _, ln := range loc.Line { + if fn := ln.Function; fn != nil { + if !re.MatchString(fn.Name) && !re.MatchString(fn.Filename) { + continue + } + } + lines = append(lines, ln) + } + return lines +} + +// focusedAndNotIgnored looks up a slice of ids against a map of +// focused/ignored locations. The map only contains locations that are +// explicitly focused or ignored. Returns whether there is at least +// one focused location but no ignored locations. +func focusedAndNotIgnored(locs []*Location, m map[uint64]bool) bool { + var f bool + for _, loc := range locs { + if focus, focusOrIgnore := m[loc.ID]; focusOrIgnore { + if focus { + // Found focused location. Must keep searching in case there + // is an ignored one as well. + f = true + } else { + // Found ignored location. Can return false right away. + return false + } + } + } + return f +} + +// TagMatch selects tags for filtering +type TagMatch func(s *Sample) bool + +// FilterSamplesByTag removes all samples from the profile, except +// those that match focus and do not match the ignore regular +// expression. +func (p *Profile) FilterSamplesByTag(focus, ignore TagMatch) (fm, im bool) { + samples := make([]*Sample, 0, len(p.Sample)) + for _, s := range p.Sample { + focused, ignored := true, false + if focus != nil { + focused = focus(s) + } + if ignore != nil { + ignored = ignore(s) + } + fm = fm || focused + im = im || ignored + if focused && !ignored { + samples = append(samples, s) + } + } + p.Sample = samples + return +} diff --git a/backend/vendor/github.com/google/pprof/profile/index.go b/backend/vendor/github.com/google/pprof/profile/index.go new file mode 100644 index 0000000..bef1d60 --- /dev/null +++ b/backend/vendor/github.com/google/pprof/profile/index.go @@ -0,0 +1,64 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package profile + +import ( + "fmt" + "strconv" + "strings" +) + +// SampleIndexByName returns the appropriate index for a value of sample index. +// If numeric, it returns the number, otherwise it looks up the text in the +// profile sample types. +func (p *Profile) SampleIndexByName(sampleIndex string) (int, error) { + if sampleIndex == "" { + if dst := p.DefaultSampleType; dst != "" { + for i, t := range sampleTypes(p) { + if t == dst { + return i, nil + } + } + } + // By default select the last sample value + return len(p.SampleType) - 1, nil + } + if i, err := strconv.Atoi(sampleIndex); err == nil { + if i < 0 || i >= len(p.SampleType) { + return 0, fmt.Errorf("sample_index %s is outside the range [0..%d]", sampleIndex, len(p.SampleType)-1) + } + return i, nil + } + + // Remove the inuse_ prefix to support legacy pprof options + // "inuse_space" and "inuse_objects" for profiles containing types + // "space" and "objects". + noInuse := strings.TrimPrefix(sampleIndex, "inuse_") + for i, t := range p.SampleType { + if t.Type == sampleIndex || t.Type == noInuse { + return i, nil + } + } + + return 0, fmt.Errorf("sample_index %q must be one of: %v", sampleIndex, sampleTypes(p)) +} + +func sampleTypes(p *Profile) []string { + types := make([]string, len(p.SampleType)) + for i, t := range p.SampleType { + types[i] = t.Type + } + return types +} diff --git a/backend/vendor/github.com/google/pprof/profile/legacy_java_profile.go b/backend/vendor/github.com/google/pprof/profile/legacy_java_profile.go new file mode 100644 index 0000000..4580bab --- /dev/null +++ b/backend/vendor/github.com/google/pprof/profile/legacy_java_profile.go @@ -0,0 +1,315 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// This file implements parsers to convert java legacy profiles into +// the profile.proto format. + +package profile + +import ( + "bytes" + "fmt" + "io" + "path/filepath" + "regexp" + "strconv" + "strings" +) + +var ( + attributeRx = regexp.MustCompile(`([\w ]+)=([\w ]+)`) + javaSampleRx = regexp.MustCompile(` *(\d+) +(\d+) +@ +([ x0-9a-f]*)`) + javaLocationRx = regexp.MustCompile(`^\s*0x([[:xdigit:]]+)\s+(.*)\s*$`) + javaLocationFileLineRx = regexp.MustCompile(`^(.*)\s+\((.+):(-?[[:digit:]]+)\)$`) + javaLocationPathRx = regexp.MustCompile(`^(.*)\s+\((.*)\)$`) +) + +// javaCPUProfile returns a new Profile from profilez data. +// b is the profile bytes after the header, period is the profiling +// period, and parse is a function to parse 8-byte chunks from the +// profile in its native endianness. +func javaCPUProfile(b []byte, period int64, parse func(b []byte) (uint64, []byte)) (*Profile, error) { + p := &Profile{ + Period: period * 1000, + PeriodType: &ValueType{Type: "cpu", Unit: "nanoseconds"}, + SampleType: []*ValueType{{Type: "samples", Unit: "count"}, {Type: "cpu", Unit: "nanoseconds"}}, + } + var err error + var locs map[uint64]*Location + if b, locs, err = parseCPUSamples(b, parse, false, p); err != nil { + return nil, err + } + + if err = parseJavaLocations(b, locs, p); err != nil { + return nil, err + } + + // Strip out addresses for better merge. + if err = p.Aggregate(true, true, true, true, false, false); err != nil { + return nil, err + } + + return p, nil +} + +// parseJavaProfile returns a new profile from heapz or contentionz +// data. b is the profile bytes after the header. +func parseJavaProfile(b []byte) (*Profile, error) { + h := bytes.SplitAfterN(b, []byte("\n"), 2) + if len(h) < 2 { + return nil, errUnrecognized + } + + p := &Profile{ + PeriodType: &ValueType{}, + } + header := string(bytes.TrimSpace(h[0])) + + var err error + var pType string + switch header { + case "--- heapz 1 ---": + pType = "heap" + case "--- contentionz 1 ---": + pType = "contention" + default: + return nil, errUnrecognized + } + + if b, err = parseJavaHeader(pType, h[1], p); err != nil { + return nil, err + } + var locs map[uint64]*Location + if b, locs, err = parseJavaSamples(pType, b, p); err != nil { + return nil, err + } + if err = parseJavaLocations(b, locs, p); err != nil { + return nil, err + } + + // Strip out addresses for better merge. + if err = p.Aggregate(true, true, true, true, false, false); err != nil { + return nil, err + } + + return p, nil +} + +// parseJavaHeader parses the attribute section on a java profile and +// populates a profile. Returns the remainder of the buffer after all +// attributes. +func parseJavaHeader(pType string, b []byte, p *Profile) ([]byte, error) { + nextNewLine := bytes.IndexByte(b, byte('\n')) + for nextNewLine != -1 { + line := string(bytes.TrimSpace(b[0:nextNewLine])) + if line != "" { + h := attributeRx.FindStringSubmatch(line) + if h == nil { + // Not a valid attribute, exit. + return b, nil + } + + attribute, value := strings.TrimSpace(h[1]), strings.TrimSpace(h[2]) + var err error + switch pType + "/" + attribute { + case "heap/format", "cpu/format", "contention/format": + if value != "java" { + return nil, errUnrecognized + } + case "heap/resolution": + p.SampleType = []*ValueType{ + {Type: "inuse_objects", Unit: "count"}, + {Type: "inuse_space", Unit: value}, + } + case "contention/resolution": + p.SampleType = []*ValueType{ + {Type: "contentions", Unit: "count"}, + {Type: "delay", Unit: value}, + } + case "contention/sampling period": + p.PeriodType = &ValueType{ + Type: "contentions", Unit: "count", + } + if p.Period, err = strconv.ParseInt(value, 0, 64); err != nil { + return nil, fmt.Errorf("failed to parse attribute %s: %v", line, err) + } + case "contention/ms since reset": + millis, err := strconv.ParseInt(value, 0, 64) + if err != nil { + return nil, fmt.Errorf("failed to parse attribute %s: %v", line, err) + } + p.DurationNanos = millis * 1000 * 1000 + default: + return nil, errUnrecognized + } + } + // Grab next line. + b = b[nextNewLine+1:] + nextNewLine = bytes.IndexByte(b, byte('\n')) + } + return b, nil +} + +// parseJavaSamples parses the samples from a java profile and +// populates the Samples in a profile. Returns the remainder of the +// buffer after the samples. +func parseJavaSamples(pType string, b []byte, p *Profile) ([]byte, map[uint64]*Location, error) { + nextNewLine := bytes.IndexByte(b, byte('\n')) + locs := make(map[uint64]*Location) + for nextNewLine != -1 { + line := string(bytes.TrimSpace(b[0:nextNewLine])) + if line != "" { + sample := javaSampleRx.FindStringSubmatch(line) + if sample == nil { + // Not a valid sample, exit. + return b, locs, nil + } + + // Java profiles have data/fields inverted compared to other + // profile types. + var err error + value1, value2, value3 := sample[2], sample[1], sample[3] + addrs, err := parseHexAddresses(value3) + if err != nil { + return nil, nil, fmt.Errorf("malformed sample: %s: %v", line, err) + } + + var sloc []*Location + for _, addr := range addrs { + loc := locs[addr] + if locs[addr] == nil { + loc = &Location{ + Address: addr, + } + p.Location = append(p.Location, loc) + locs[addr] = loc + } + sloc = append(sloc, loc) + } + s := &Sample{ + Value: make([]int64, 2), + Location: sloc, + } + + if s.Value[0], err = strconv.ParseInt(value1, 0, 64); err != nil { + return nil, nil, fmt.Errorf("parsing sample %s: %v", line, err) + } + if s.Value[1], err = strconv.ParseInt(value2, 0, 64); err != nil { + return nil, nil, fmt.Errorf("parsing sample %s: %v", line, err) + } + + switch pType { + case "heap": + const javaHeapzSamplingRate = 524288 // 512K + if s.Value[0] == 0 { + return nil, nil, fmt.Errorf("parsing sample %s: second value must be non-zero", line) + } + s.NumLabel = map[string][]int64{"bytes": {s.Value[1] / s.Value[0]}} + s.Value[0], s.Value[1] = scaleHeapSample(s.Value[0], s.Value[1], javaHeapzSamplingRate) + case "contention": + if period := p.Period; period != 0 { + s.Value[0] = s.Value[0] * p.Period + s.Value[1] = s.Value[1] * p.Period + } + } + p.Sample = append(p.Sample, s) + } + // Grab next line. + b = b[nextNewLine+1:] + nextNewLine = bytes.IndexByte(b, byte('\n')) + } + return b, locs, nil +} + +// parseJavaLocations parses the location information in a java +// profile and populates the Locations in a profile. It uses the +// location addresses from the profile as both the ID of each +// location. +func parseJavaLocations(b []byte, locs map[uint64]*Location, p *Profile) error { + r := bytes.NewBuffer(b) + fns := make(map[string]*Function) + for { + line, err := r.ReadString('\n') + if err != nil { + if err != io.EOF { + return err + } + if line == "" { + break + } + } + + if line = strings.TrimSpace(line); line == "" { + continue + } + + jloc := javaLocationRx.FindStringSubmatch(line) + if len(jloc) != 3 { + continue + } + addr, err := strconv.ParseUint(jloc[1], 16, 64) + if err != nil { + return fmt.Errorf("parsing sample %s: %v", line, err) + } + loc := locs[addr] + if loc == nil { + // Unused/unseen + continue + } + var lineFunc, lineFile string + var lineNo int64 + + if fileLine := javaLocationFileLineRx.FindStringSubmatch(jloc[2]); len(fileLine) == 4 { + // Found a line of the form: "function (file:line)" + lineFunc, lineFile = fileLine[1], fileLine[2] + if n, err := strconv.ParseInt(fileLine[3], 10, 64); err == nil && n > 0 { + lineNo = n + } + } else if filePath := javaLocationPathRx.FindStringSubmatch(jloc[2]); len(filePath) == 3 { + // If there's not a file:line, it's a shared library path. + // The path isn't interesting, so just give the .so. + lineFunc, lineFile = filePath[1], filepath.Base(filePath[2]) + } else if strings.Contains(jloc[2], "generated stub/JIT") { + lineFunc = "STUB" + } else { + // Treat whole line as the function name. This is used by the + // java agent for internal states such as "GC" or "VM". + lineFunc = jloc[2] + } + fn := fns[lineFunc] + + if fn == nil { + fn = &Function{ + Name: lineFunc, + SystemName: lineFunc, + Filename: lineFile, + } + fns[lineFunc] = fn + p.Function = append(p.Function, fn) + } + loc.Line = []Line{ + { + Function: fn, + Line: lineNo, + }, + } + loc.Address = 0 + } + + p.remapLocationIDs() + p.remapFunctionIDs() + p.remapMappingIDs() + + return nil +} diff --git a/backend/vendor/github.com/google/pprof/profile/legacy_profile.go b/backend/vendor/github.com/google/pprof/profile/legacy_profile.go new file mode 100644 index 0000000..8d07fd6 --- /dev/null +++ b/backend/vendor/github.com/google/pprof/profile/legacy_profile.go @@ -0,0 +1,1228 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// This file implements parsers to convert legacy profiles into the +// profile.proto format. + +package profile + +import ( + "bufio" + "bytes" + "fmt" + "io" + "math" + "regexp" + "strconv" + "strings" +) + +var ( + countStartRE = regexp.MustCompile(`\A(\S+) profile: total \d+\z`) + countRE = regexp.MustCompile(`\A(\d+) @(( 0x[0-9a-f]+)+)\z`) + + heapHeaderRE = regexp.MustCompile(`heap profile: *(\d+): *(\d+) *\[ *(\d+): *(\d+) *\] *@ *(heap[_a-z0-9]*)/?(\d*)`) + heapSampleRE = regexp.MustCompile(`(-?\d+): *(-?\d+) *\[ *(\d+): *(\d+) *] @([ x0-9a-f]*)`) + + contentionSampleRE = regexp.MustCompile(`(\d+) *(\d+) @([ x0-9a-f]*)`) + + hexNumberRE = regexp.MustCompile(`0x[0-9a-f]+`) + + growthHeaderRE = regexp.MustCompile(`heap profile: *(\d+): *(\d+) *\[ *(\d+): *(\d+) *\] @ growthz?`) + + fragmentationHeaderRE = regexp.MustCompile(`heap profile: *(\d+): *(\d+) *\[ *(\d+): *(\d+) *\] @ fragmentationz?`) + + threadzStartRE = regexp.MustCompile(`--- threadz \d+ ---`) + threadStartRE = regexp.MustCompile(`--- Thread ([[:xdigit:]]+) \(name: (.*)/(\d+)\) stack: ---`) + + // Regular expressions to parse process mappings. Support the format used by Linux /proc/.../maps and other tools. + // Recommended format: + // Start End object file name offset(optional) linker build id + // 0x40000-0x80000 /path/to/binary (@FF00) abc123456 + spaceDigits = `\s+[[:digit:]]+` + hexPair = `\s+[[:xdigit:]]+:[[:xdigit:]]+` + oSpace = `\s*` + // Capturing expressions. + cHex = `(?:0x)?([[:xdigit:]]+)` + cHexRange = `\s*` + cHex + `[\s-]?` + oSpace + cHex + `:?` + cSpaceString = `(?:\s+(\S+))?` + cSpaceHex = `(?:\s+([[:xdigit:]]+))?` + cSpaceAtOffset = `(?:\s+\(@([[:xdigit:]]+)\))?` + cPerm = `(?:\s+([-rwxp]+))?` + + procMapsRE = regexp.MustCompile(`^` + cHexRange + cPerm + cSpaceHex + hexPair + spaceDigits + cSpaceString) + briefMapsRE = regexp.MustCompile(`^` + cHexRange + cPerm + cSpaceString + cSpaceAtOffset + cSpaceHex) + + // Regular expression to parse log data, of the form: + // ... file:line] msg... + logInfoRE = regexp.MustCompile(`^[^\[\]]+:[0-9]+]\s`) +) + +func isSpaceOrComment(line string) bool { + trimmed := strings.TrimSpace(line) + return len(trimmed) == 0 || trimmed[0] == '#' +} + +// parseGoCount parses a Go count profile (e.g., threadcreate or +// goroutine) and returns a new Profile. +func parseGoCount(b []byte) (*Profile, error) { + s := bufio.NewScanner(bytes.NewBuffer(b)) + // Skip comments at the beginning of the file. + for s.Scan() && isSpaceOrComment(s.Text()) { + } + if err := s.Err(); err != nil { + return nil, err + } + m := countStartRE.FindStringSubmatch(s.Text()) + if m == nil { + return nil, errUnrecognized + } + profileType := m[1] + p := &Profile{ + PeriodType: &ValueType{Type: profileType, Unit: "count"}, + Period: 1, + SampleType: []*ValueType{{Type: profileType, Unit: "count"}}, + } + locations := make(map[uint64]*Location) + for s.Scan() { + line := s.Text() + if isSpaceOrComment(line) { + continue + } + if strings.HasPrefix(line, "---") { + break + } + m := countRE.FindStringSubmatch(line) + if m == nil { + return nil, errMalformed + } + n, err := strconv.ParseInt(m[1], 0, 64) + if err != nil { + return nil, errMalformed + } + fields := strings.Fields(m[2]) + locs := make([]*Location, 0, len(fields)) + for _, stk := range fields { + addr, err := strconv.ParseUint(stk, 0, 64) + if err != nil { + return nil, errMalformed + } + // Adjust all frames by -1 to land on top of the call instruction. + addr-- + loc := locations[addr] + if loc == nil { + loc = &Location{ + Address: addr, + } + locations[addr] = loc + p.Location = append(p.Location, loc) + } + locs = append(locs, loc) + } + p.Sample = append(p.Sample, &Sample{ + Location: locs, + Value: []int64{n}, + }) + } + if err := s.Err(); err != nil { + return nil, err + } + + if err := parseAdditionalSections(s, p); err != nil { + return nil, err + } + return p, nil +} + +// remapLocationIDs ensures there is a location for each address +// referenced by a sample, and remaps the samples to point to the new +// location ids. +func (p *Profile) remapLocationIDs() { + seen := make(map[*Location]bool, len(p.Location)) + var locs []*Location + + for _, s := range p.Sample { + for _, l := range s.Location { + if seen[l] { + continue + } + l.ID = uint64(len(locs) + 1) + locs = append(locs, l) + seen[l] = true + } + } + p.Location = locs +} + +func (p *Profile) remapFunctionIDs() { + seen := make(map[*Function]bool, len(p.Function)) + var fns []*Function + + for _, l := range p.Location { + for _, ln := range l.Line { + fn := ln.Function + if fn == nil || seen[fn] { + continue + } + fn.ID = uint64(len(fns) + 1) + fns = append(fns, fn) + seen[fn] = true + } + } + p.Function = fns +} + +// remapMappingIDs matches location addresses with existing mappings +// and updates them appropriately. This is O(N*M), if this ever shows +// up as a bottleneck, evaluate sorting the mappings and doing a +// binary search, which would make it O(N*log(M)). +func (p *Profile) remapMappingIDs() { + // Some profile handlers will incorrectly set regions for the main + // executable if its section is remapped. Fix them through heuristics. + + if len(p.Mapping) > 0 { + // Remove the initial mapping if named '/anon_hugepage' and has a + // consecutive adjacent mapping. + if m := p.Mapping[0]; strings.HasPrefix(m.File, "/anon_hugepage") { + if len(p.Mapping) > 1 && m.Limit == p.Mapping[1].Start { + p.Mapping = p.Mapping[1:] + } + } + } + + // Subtract the offset from the start of the main mapping if it + // ends up at a recognizable start address. + if len(p.Mapping) > 0 { + const expectedStart = 0x400000 + if m := p.Mapping[0]; m.Start-m.Offset == expectedStart { + m.Start = expectedStart + m.Offset = 0 + } + } + + // Associate each location with an address to the corresponding + // mapping. Create fake mapping if a suitable one isn't found. + var fake *Mapping +nextLocation: + for _, l := range p.Location { + a := l.Address + if l.Mapping != nil || a == 0 { + continue + } + for _, m := range p.Mapping { + if m.Start <= a && a < m.Limit { + l.Mapping = m + continue nextLocation + } + } + // Work around legacy handlers failing to encode the first + // part of mappings split into adjacent ranges. + for _, m := range p.Mapping { + if m.Offset != 0 && m.Start-m.Offset <= a && a < m.Start { + m.Start -= m.Offset + m.Offset = 0 + l.Mapping = m + continue nextLocation + } + } + // If there is still no mapping, create a fake one. + // This is important for the Go legacy handler, which produced + // no mappings. + if fake == nil { + fake = &Mapping{ + ID: 1, + Limit: ^uint64(0), + } + p.Mapping = append(p.Mapping, fake) + } + l.Mapping = fake + } + + // Reset all mapping IDs. + for i, m := range p.Mapping { + m.ID = uint64(i + 1) + } +} + +var cpuInts = []func([]byte) (uint64, []byte){ + get32l, + get32b, + get64l, + get64b, +} + +func get32l(b []byte) (uint64, []byte) { + if len(b) < 4 { + return 0, nil + } + return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24, b[4:] +} + +func get32b(b []byte) (uint64, []byte) { + if len(b) < 4 { + return 0, nil + } + return uint64(b[3]) | uint64(b[2])<<8 | uint64(b[1])<<16 | uint64(b[0])<<24, b[4:] +} + +func get64l(b []byte) (uint64, []byte) { + if len(b) < 8 { + return 0, nil + } + return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56, b[8:] +} + +func get64b(b []byte) (uint64, []byte) { + if len(b) < 8 { + return 0, nil + } + return uint64(b[7]) | uint64(b[6])<<8 | uint64(b[5])<<16 | uint64(b[4])<<24 | uint64(b[3])<<32 | uint64(b[2])<<40 | uint64(b[1])<<48 | uint64(b[0])<<56, b[8:] +} + +// parseCPU parses a profilez legacy profile and returns a newly +// populated Profile. +// +// The general format for profilez samples is a sequence of words in +// binary format. The first words are a header with the following data: +// +// 1st word -- 0 +// 2nd word -- 3 +// 3rd word -- 0 if a c++ application, 1 if a java application. +// 4th word -- Sampling period (in microseconds). +// 5th word -- Padding. +func parseCPU(b []byte) (*Profile, error) { + var parse func([]byte) (uint64, []byte) + var n1, n2, n3, n4, n5 uint64 + for _, parse = range cpuInts { + var tmp []byte + n1, tmp = parse(b) + n2, tmp = parse(tmp) + n3, tmp = parse(tmp) + n4, tmp = parse(tmp) + n5, tmp = parse(tmp) + + if tmp != nil && n1 == 0 && n2 == 3 && n3 == 0 && n4 > 0 && n5 == 0 { + b = tmp + return cpuProfile(b, int64(n4), parse) + } + if tmp != nil && n1 == 0 && n2 == 3 && n3 == 1 && n4 > 0 && n5 == 0 { + b = tmp + return javaCPUProfile(b, int64(n4), parse) + } + } + return nil, errUnrecognized +} + +// cpuProfile returns a new Profile from C++ profilez data. +// b is the profile bytes after the header, period is the profiling +// period, and parse is a function to parse 8-byte chunks from the +// profile in its native endianness. +func cpuProfile(b []byte, period int64, parse func(b []byte) (uint64, []byte)) (*Profile, error) { + p := &Profile{ + Period: period * 1000, + PeriodType: &ValueType{Type: "cpu", Unit: "nanoseconds"}, + SampleType: []*ValueType{ + {Type: "samples", Unit: "count"}, + {Type: "cpu", Unit: "nanoseconds"}, + }, + } + var err error + if b, _, err = parseCPUSamples(b, parse, true, p); err != nil { + return nil, err + } + + // If *most* samples have the same second-to-the-bottom frame, it + // strongly suggests that it is an uninteresting artifact of + // measurement -- a stack frame pushed by the signal handler. The + // bottom frame is always correct as it is picked up from the signal + // structure, not the stack. Check if this is the case and if so, + // remove. + + // Remove up to two frames. + maxiter := 2 + // Allow one different sample for this many samples with the same + // second-to-last frame. + similarSamples := 32 + margin := len(p.Sample) / similarSamples + + for iter := 0; iter < maxiter; iter++ { + addr1 := make(map[uint64]int) + for _, s := range p.Sample { + if len(s.Location) > 1 { + a := s.Location[1].Address + addr1[a] = addr1[a] + 1 + } + } + + for id1, count := range addr1 { + if count >= len(p.Sample)-margin { + // Found uninteresting frame, strip it out from all samples + for _, s := range p.Sample { + if len(s.Location) > 1 && s.Location[1].Address == id1 { + s.Location = append(s.Location[:1], s.Location[2:]...) + } + } + break + } + } + } + + if err := p.ParseMemoryMap(bytes.NewBuffer(b)); err != nil { + return nil, err + } + + cleanupDuplicateLocations(p) + return p, nil +} + +func cleanupDuplicateLocations(p *Profile) { + // The profile handler may duplicate the leaf frame, because it gets + // its address both from stack unwinding and from the signal + // context. Detect this and delete the duplicate, which has been + // adjusted by -1. The leaf address should not be adjusted as it is + // not a call. + for _, s := range p.Sample { + if len(s.Location) > 1 && s.Location[0].Address == s.Location[1].Address+1 { + s.Location = append(s.Location[:1], s.Location[2:]...) + } + } +} + +// parseCPUSamples parses a collection of profilez samples from a +// profile. +// +// profilez samples are a repeated sequence of stack frames of the +// form: +// +// 1st word -- The number of times this stack was encountered. +// 2nd word -- The size of the stack (StackSize). +// 3rd word -- The first address on the stack. +// ... +// StackSize + 2 -- The last address on the stack +// +// The last stack trace is of the form: +// +// 1st word -- 0 +// 2nd word -- 1 +// 3rd word -- 0 +// +// Addresses from stack traces may point to the next instruction after +// each call. Optionally adjust by -1 to land somewhere on the actual +// call (except for the leaf, which is not a call). +func parseCPUSamples(b []byte, parse func(b []byte) (uint64, []byte), adjust bool, p *Profile) ([]byte, map[uint64]*Location, error) { + locs := make(map[uint64]*Location) + for len(b) > 0 { + var count, nstk uint64 + count, b = parse(b) + nstk, b = parse(b) + if b == nil || nstk > uint64(len(b)/4) { + return nil, nil, errUnrecognized + } + var sloc []*Location + addrs := make([]uint64, nstk) + for i := 0; i < int(nstk); i++ { + addrs[i], b = parse(b) + } + + if count == 0 && nstk == 1 && addrs[0] == 0 { + // End of data marker + break + } + for i, addr := range addrs { + if adjust && i > 0 { + addr-- + } + loc := locs[addr] + if loc == nil { + loc = &Location{ + Address: addr, + } + locs[addr] = loc + p.Location = append(p.Location, loc) + } + sloc = append(sloc, loc) + } + p.Sample = append(p.Sample, + &Sample{ + Value: []int64{int64(count), int64(count) * p.Period}, + Location: sloc, + }) + } + // Reached the end without finding the EOD marker. + return b, locs, nil +} + +// parseHeap parses a heapz legacy or a growthz profile and +// returns a newly populated Profile. +func parseHeap(b []byte) (p *Profile, err error) { + s := bufio.NewScanner(bytes.NewBuffer(b)) + if !s.Scan() { + if err := s.Err(); err != nil { + return nil, err + } + return nil, errUnrecognized + } + p = &Profile{} + + sampling := "" + hasAlloc := false + + line := s.Text() + p.PeriodType = &ValueType{Type: "space", Unit: "bytes"} + if header := heapHeaderRE.FindStringSubmatch(line); header != nil { + sampling, p.Period, hasAlloc, err = parseHeapHeader(line) + if err != nil { + return nil, err + } + } else if header = growthHeaderRE.FindStringSubmatch(line); header != nil { + p.Period = 1 + } else if header = fragmentationHeaderRE.FindStringSubmatch(line); header != nil { + p.Period = 1 + } else { + return nil, errUnrecognized + } + + if hasAlloc { + // Put alloc before inuse so that default pprof selection + // will prefer inuse_space. + p.SampleType = []*ValueType{ + {Type: "alloc_objects", Unit: "count"}, + {Type: "alloc_space", Unit: "bytes"}, + {Type: "inuse_objects", Unit: "count"}, + {Type: "inuse_space", Unit: "bytes"}, + } + } else { + p.SampleType = []*ValueType{ + {Type: "objects", Unit: "count"}, + {Type: "space", Unit: "bytes"}, + } + } + + locs := make(map[uint64]*Location) + for s.Scan() { + line := strings.TrimSpace(s.Text()) + + if isSpaceOrComment(line) { + continue + } + + if isMemoryMapSentinel(line) { + break + } + + value, blocksize, addrs, err := parseHeapSample(line, p.Period, sampling, hasAlloc) + if err != nil { + return nil, err + } + + var sloc []*Location + for _, addr := range addrs { + // Addresses from stack traces point to the next instruction after + // each call. Adjust by -1 to land somewhere on the actual call. + addr-- + loc := locs[addr] + if locs[addr] == nil { + loc = &Location{ + Address: addr, + } + p.Location = append(p.Location, loc) + locs[addr] = loc + } + sloc = append(sloc, loc) + } + + p.Sample = append(p.Sample, &Sample{ + Value: value, + Location: sloc, + NumLabel: map[string][]int64{"bytes": {blocksize}}, + }) + } + if err := s.Err(); err != nil { + return nil, err + } + if err := parseAdditionalSections(s, p); err != nil { + return nil, err + } + return p, nil +} + +func parseHeapHeader(line string) (sampling string, period int64, hasAlloc bool, err error) { + header := heapHeaderRE.FindStringSubmatch(line) + if header == nil { + return "", 0, false, errUnrecognized + } + + if len(header[6]) > 0 { + if period, err = strconv.ParseInt(header[6], 10, 64); err != nil { + return "", 0, false, errUnrecognized + } + } + + if (header[3] != header[1] && header[3] != "0") || (header[4] != header[2] && header[4] != "0") { + hasAlloc = true + } + + switch header[5] { + case "heapz_v2", "heap_v2": + return "v2", period, hasAlloc, nil + case "heapprofile": + return "", 1, hasAlloc, nil + case "heap": + return "v2", period / 2, hasAlloc, nil + default: + return "", 0, false, errUnrecognized + } +} + +// parseHeapSample parses a single row from a heap profile into a new Sample. +func parseHeapSample(line string, rate int64, sampling string, includeAlloc bool) (value []int64, blocksize int64, addrs []uint64, err error) { + sampleData := heapSampleRE.FindStringSubmatch(line) + if len(sampleData) != 6 { + return nil, 0, nil, fmt.Errorf("unexpected number of sample values: got %d, want 6", len(sampleData)) + } + + // This is a local-scoped helper function to avoid needing to pass + // around rate, sampling and many return parameters. + addValues := func(countString, sizeString string, label string) error { + count, err := strconv.ParseInt(countString, 10, 64) + if err != nil { + return fmt.Errorf("malformed sample: %s: %v", line, err) + } + size, err := strconv.ParseInt(sizeString, 10, 64) + if err != nil { + return fmt.Errorf("malformed sample: %s: %v", line, err) + } + if count == 0 && size != 0 { + return fmt.Errorf("%s count was 0 but %s bytes was %d", label, label, size) + } + if count != 0 { + blocksize = size / count + if sampling == "v2" { + count, size = scaleHeapSample(count, size, rate) + } + } + value = append(value, count, size) + return nil + } + + if includeAlloc { + if err := addValues(sampleData[3], sampleData[4], "allocation"); err != nil { + return nil, 0, nil, err + } + } + + if err := addValues(sampleData[1], sampleData[2], "inuse"); err != nil { + return nil, 0, nil, err + } + + addrs, err = parseHexAddresses(sampleData[5]) + if err != nil { + return nil, 0, nil, fmt.Errorf("malformed sample: %s: %v", line, err) + } + + return value, blocksize, addrs, nil +} + +// parseHexAddresses extracts hex numbers from a string, attempts to convert +// each to an unsigned 64-bit number and returns the resulting numbers as a +// slice, or an error if the string contains hex numbers which are too large to +// handle (which means a malformed profile). +func parseHexAddresses(s string) ([]uint64, error) { + hexStrings := hexNumberRE.FindAllString(s, -1) + var addrs []uint64 + for _, s := range hexStrings { + if addr, err := strconv.ParseUint(s, 0, 64); err == nil { + addrs = append(addrs, addr) + } else { + return nil, fmt.Errorf("failed to parse as hex 64-bit number: %s", s) + } + } + return addrs, nil +} + +// scaleHeapSample adjusts the data from a heapz Sample to +// account for its probability of appearing in the collected +// data. heapz profiles are a sampling of the memory allocations +// requests in a program. We estimate the unsampled value by dividing +// each collected sample by its probability of appearing in the +// profile. heapz v2 profiles rely on a poisson process to determine +// which samples to collect, based on the desired average collection +// rate R. The probability of a sample of size S to appear in that +// profile is 1-exp(-S/R). +func scaleHeapSample(count, size, rate int64) (int64, int64) { + if count == 0 || size == 0 { + return 0, 0 + } + + if rate <= 1 { + // if rate==1 all samples were collected so no adjustment is needed. + // if rate<1 treat as unknown and skip scaling. + return count, size + } + + avgSize := float64(size) / float64(count) + scale := 1 / (1 - math.Exp(-avgSize/float64(rate))) + + return int64(float64(count) * scale), int64(float64(size) * scale) +} + +// parseContention parses a mutex or contention profile. There are 2 cases: +// "--- contentionz " for legacy C++ profiles (and backwards compatibility) +// "--- mutex:" or "--- contention:" for profiles generated by the Go runtime. +func parseContention(b []byte) (*Profile, error) { + s := bufio.NewScanner(bytes.NewBuffer(b)) + if !s.Scan() { + if err := s.Err(); err != nil { + return nil, err + } + return nil, errUnrecognized + } + + switch l := s.Text(); { + case strings.HasPrefix(l, "--- contentionz "): + case strings.HasPrefix(l, "--- mutex:"): + case strings.HasPrefix(l, "--- contention:"): + default: + return nil, errUnrecognized + } + + p := &Profile{ + PeriodType: &ValueType{Type: "contentions", Unit: "count"}, + Period: 1, + SampleType: []*ValueType{ + {Type: "contentions", Unit: "count"}, + {Type: "delay", Unit: "nanoseconds"}, + }, + } + + var cpuHz int64 + // Parse text of the form "attribute = value" before the samples. + const delimiter = "=" + for s.Scan() { + line := s.Text() + if line = strings.TrimSpace(line); isSpaceOrComment(line) { + continue + } + if strings.HasPrefix(line, "---") { + break + } + attr := strings.SplitN(line, delimiter, 2) + if len(attr) != 2 { + break + } + key, val := strings.TrimSpace(attr[0]), strings.TrimSpace(attr[1]) + var err error + switch key { + case "cycles/second": + if cpuHz, err = strconv.ParseInt(val, 0, 64); err != nil { + return nil, errUnrecognized + } + case "sampling period": + if p.Period, err = strconv.ParseInt(val, 0, 64); err != nil { + return nil, errUnrecognized + } + case "ms since reset": + ms, err := strconv.ParseInt(val, 0, 64) + if err != nil { + return nil, errUnrecognized + } + p.DurationNanos = ms * 1000 * 1000 + case "format": + // CPP contentionz profiles don't have format. + return nil, errUnrecognized + case "resolution": + // CPP contentionz profiles don't have resolution. + return nil, errUnrecognized + case "discarded samples": + default: + return nil, errUnrecognized + } + } + if err := s.Err(); err != nil { + return nil, err + } + + locs := make(map[uint64]*Location) + for { + line := strings.TrimSpace(s.Text()) + if strings.HasPrefix(line, "---") { + break + } + if !isSpaceOrComment(line) { + value, addrs, err := parseContentionSample(line, p.Period, cpuHz) + if err != nil { + return nil, err + } + var sloc []*Location + for _, addr := range addrs { + // Addresses from stack traces point to the next instruction after + // each call. Adjust by -1 to land somewhere on the actual call. + addr-- + loc := locs[addr] + if locs[addr] == nil { + loc = &Location{ + Address: addr, + } + p.Location = append(p.Location, loc) + locs[addr] = loc + } + sloc = append(sloc, loc) + } + p.Sample = append(p.Sample, &Sample{ + Value: value, + Location: sloc, + }) + } + if !s.Scan() { + break + } + } + if err := s.Err(); err != nil { + return nil, err + } + + if err := parseAdditionalSections(s, p); err != nil { + return nil, err + } + + return p, nil +} + +// parseContentionSample parses a single row from a contention profile +// into a new Sample. +func parseContentionSample(line string, period, cpuHz int64) (value []int64, addrs []uint64, err error) { + sampleData := contentionSampleRE.FindStringSubmatch(line) + if sampleData == nil { + return nil, nil, errUnrecognized + } + + v1, err := strconv.ParseInt(sampleData[1], 10, 64) + if err != nil { + return nil, nil, fmt.Errorf("malformed sample: %s: %v", line, err) + } + v2, err := strconv.ParseInt(sampleData[2], 10, 64) + if err != nil { + return nil, nil, fmt.Errorf("malformed sample: %s: %v", line, err) + } + + // Unsample values if period and cpuHz are available. + // - Delays are scaled to cycles and then to nanoseconds. + // - Contentions are scaled to cycles. + if period > 0 { + if cpuHz > 0 { + cpuGHz := float64(cpuHz) / 1e9 + v1 = int64(float64(v1) * float64(period) / cpuGHz) + } + v2 = v2 * period + } + + value = []int64{v2, v1} + addrs, err = parseHexAddresses(sampleData[3]) + if err != nil { + return nil, nil, fmt.Errorf("malformed sample: %s: %v", line, err) + } + + return value, addrs, nil +} + +// parseThread parses a Threadz profile and returns a new Profile. +func parseThread(b []byte) (*Profile, error) { + s := bufio.NewScanner(bytes.NewBuffer(b)) + // Skip past comments and empty lines seeking a real header. + for s.Scan() && isSpaceOrComment(s.Text()) { + } + + line := s.Text() + if m := threadzStartRE.FindStringSubmatch(line); m != nil { + // Advance over initial comments until first stack trace. + for s.Scan() { + if line = s.Text(); isMemoryMapSentinel(line) || strings.HasPrefix(line, "-") { + break + } + } + } else if t := threadStartRE.FindStringSubmatch(line); len(t) != 4 { + return nil, errUnrecognized + } + + p := &Profile{ + SampleType: []*ValueType{{Type: "thread", Unit: "count"}}, + PeriodType: &ValueType{Type: "thread", Unit: "count"}, + Period: 1, + } + + locs := make(map[uint64]*Location) + // Recognize each thread and populate profile samples. + for !isMemoryMapSentinel(line) { + if strings.HasPrefix(line, "---- no stack trace for") { + break + } + if t := threadStartRE.FindStringSubmatch(line); len(t) != 4 { + return nil, errUnrecognized + } + + var addrs []uint64 + var err error + line, addrs, err = parseThreadSample(s) + if err != nil { + return nil, err + } + if len(addrs) == 0 { + // We got a --same as previous threads--. Bump counters. + if len(p.Sample) > 0 { + s := p.Sample[len(p.Sample)-1] + s.Value[0]++ + } + continue + } + + var sloc []*Location + for i, addr := range addrs { + // Addresses from stack traces point to the next instruction after + // each call. Adjust by -1 to land somewhere on the actual call + // (except for the leaf, which is not a call). + if i > 0 { + addr-- + } + loc := locs[addr] + if locs[addr] == nil { + loc = &Location{ + Address: addr, + } + p.Location = append(p.Location, loc) + locs[addr] = loc + } + sloc = append(sloc, loc) + } + + p.Sample = append(p.Sample, &Sample{ + Value: []int64{1}, + Location: sloc, + }) + } + + if err := parseAdditionalSections(s, p); err != nil { + return nil, err + } + + cleanupDuplicateLocations(p) + return p, nil +} + +// parseThreadSample parses a symbolized or unsymbolized stack trace. +// Returns the first line after the traceback, the sample (or nil if +// it hits a 'same-as-previous' marker) and an error. +func parseThreadSample(s *bufio.Scanner) (nextl string, addrs []uint64, err error) { + var line string + sameAsPrevious := false + for s.Scan() { + line = strings.TrimSpace(s.Text()) + if line == "" { + continue + } + + if strings.HasPrefix(line, "---") { + break + } + if strings.Contains(line, "same as previous thread") { + sameAsPrevious = true + continue + } + + curAddrs, err := parseHexAddresses(line) + if err != nil { + return "", nil, fmt.Errorf("malformed sample: %s: %v", line, err) + } + addrs = append(addrs, curAddrs...) + } + if err := s.Err(); err != nil { + return "", nil, err + } + if sameAsPrevious { + return line, nil, nil + } + return line, addrs, nil +} + +// parseAdditionalSections parses any additional sections in the +// profile, ignoring any unrecognized sections. +func parseAdditionalSections(s *bufio.Scanner, p *Profile) error { + for !isMemoryMapSentinel(s.Text()) && s.Scan() { + } + if err := s.Err(); err != nil { + return err + } + return p.ParseMemoryMapFromScanner(s) +} + +// ParseProcMaps parses a memory map in the format of /proc/self/maps. +// ParseMemoryMap should be called after setting on a profile to +// associate locations to the corresponding mapping based on their +// address. +func ParseProcMaps(rd io.Reader) ([]*Mapping, error) { + s := bufio.NewScanner(rd) + return parseProcMapsFromScanner(s) +} + +func parseProcMapsFromScanner(s *bufio.Scanner) ([]*Mapping, error) { + var mapping []*Mapping + + var attrs []string + const delimiter = "=" + r := strings.NewReplacer() + for s.Scan() { + line := r.Replace(removeLoggingInfo(s.Text())) + m, err := parseMappingEntry(line) + if err != nil { + if err == errUnrecognized { + // Recognize assignments of the form: attr=value, and replace + // $attr with value on subsequent mappings. + if attr := strings.SplitN(line, delimiter, 2); len(attr) == 2 { + attrs = append(attrs, "$"+strings.TrimSpace(attr[0]), strings.TrimSpace(attr[1])) + r = strings.NewReplacer(attrs...) + } + // Ignore any unrecognized entries + continue + } + return nil, err + } + if m == nil { + continue + } + mapping = append(mapping, m) + } + if err := s.Err(); err != nil { + return nil, err + } + return mapping, nil +} + +// removeLoggingInfo detects and removes log prefix entries generated +// by the glog package. If no logging prefix is detected, the string +// is returned unmodified. +func removeLoggingInfo(line string) string { + if match := logInfoRE.FindStringIndex(line); match != nil { + return line[match[1]:] + } + return line +} + +// ParseMemoryMap parses a memory map in the format of +// /proc/self/maps, and overrides the mappings in the current profile. +// It renumbers the samples and locations in the profile correspondingly. +func (p *Profile) ParseMemoryMap(rd io.Reader) error { + return p.ParseMemoryMapFromScanner(bufio.NewScanner(rd)) +} + +// ParseMemoryMapFromScanner parses a memory map in the format of +// /proc/self/maps or a variety of legacy format, and overrides the +// mappings in the current profile. It renumbers the samples and +// locations in the profile correspondingly. +func (p *Profile) ParseMemoryMapFromScanner(s *bufio.Scanner) error { + mapping, err := parseProcMapsFromScanner(s) + if err != nil { + return err + } + p.Mapping = append(p.Mapping, mapping...) + p.massageMappings() + p.remapLocationIDs() + p.remapFunctionIDs() + p.remapMappingIDs() + return nil +} + +func parseMappingEntry(l string) (*Mapping, error) { + var start, end, perm, file, offset, buildID string + if me := procMapsRE.FindStringSubmatch(l); len(me) == 6 { + start, end, perm, offset, file = me[1], me[2], me[3], me[4], me[5] + } else if me := briefMapsRE.FindStringSubmatch(l); len(me) == 7 { + start, end, perm, file, offset, buildID = me[1], me[2], me[3], me[4], me[5], me[6] + } else { + return nil, errUnrecognized + } + + var err error + mapping := &Mapping{ + File: file, + BuildID: buildID, + } + if perm != "" && !strings.Contains(perm, "x") { + // Skip non-executable entries. + return nil, nil + } + if mapping.Start, err = strconv.ParseUint(start, 16, 64); err != nil { + return nil, errUnrecognized + } + if mapping.Limit, err = strconv.ParseUint(end, 16, 64); err != nil { + return nil, errUnrecognized + } + if offset != "" { + if mapping.Offset, err = strconv.ParseUint(offset, 16, 64); err != nil { + return nil, errUnrecognized + } + } + return mapping, nil +} + +var memoryMapSentinels = []string{ + "--- Memory map: ---", + "MAPPED_LIBRARIES:", +} + +// isMemoryMapSentinel returns true if the string contains one of the +// known sentinels for memory map information. +func isMemoryMapSentinel(line string) bool { + for _, s := range memoryMapSentinels { + if strings.Contains(line, s) { + return true + } + } + return false +} + +func (p *Profile) addLegacyFrameInfo() { + switch { + case isProfileType(p, heapzSampleTypes): + p.DropFrames, p.KeepFrames = allocRxStr, allocSkipRxStr + case isProfileType(p, contentionzSampleTypes): + p.DropFrames, p.KeepFrames = lockRxStr, "" + default: + p.DropFrames, p.KeepFrames = cpuProfilerRxStr, "" + } +} + +var heapzSampleTypes = [][]string{ + {"allocations", "size"}, // early Go pprof profiles + {"objects", "space"}, + {"inuse_objects", "inuse_space"}, + {"alloc_objects", "alloc_space"}, + {"alloc_objects", "alloc_space", "inuse_objects", "inuse_space"}, // Go pprof legacy profiles +} +var contentionzSampleTypes = [][]string{ + {"contentions", "delay"}, +} + +func isProfileType(p *Profile, types [][]string) bool { + st := p.SampleType +nextType: + for _, t := range types { + if len(st) != len(t) { + continue + } + + for i := range st { + if st[i].Type != t[i] { + continue nextType + } + } + return true + } + return false +} + +var allocRxStr = strings.Join([]string{ + // POSIX entry points. + `calloc`, + `cfree`, + `malloc`, + `free`, + `memalign`, + `do_memalign`, + `(__)?posix_memalign`, + `pvalloc`, + `valloc`, + `realloc`, + + // TC malloc. + `tcmalloc::.*`, + `tc_calloc`, + `tc_cfree`, + `tc_malloc`, + `tc_free`, + `tc_memalign`, + `tc_posix_memalign`, + `tc_pvalloc`, + `tc_valloc`, + `tc_realloc`, + `tc_new`, + `tc_delete`, + `tc_newarray`, + `tc_deletearray`, + `tc_new_nothrow`, + `tc_newarray_nothrow`, + + // Memory-allocation routines on OS X. + `malloc_zone_malloc`, + `malloc_zone_calloc`, + `malloc_zone_valloc`, + `malloc_zone_realloc`, + `malloc_zone_memalign`, + `malloc_zone_free`, + + // Go runtime + `runtime\..*`, + + // Other misc. memory allocation routines + `BaseArena::.*`, + `(::)?do_malloc_no_errno`, + `(::)?do_malloc_pages`, + `(::)?do_malloc`, + `DoSampledAllocation`, + `MallocedMemBlock::MallocedMemBlock`, + `_M_allocate`, + `__builtin_(vec_)?delete`, + `__builtin_(vec_)?new`, + `__gnu_cxx::new_allocator::allocate`, + `__libc_malloc`, + `__malloc_alloc_template::allocate`, + `allocate`, + `cpp_alloc`, + `operator new(\[\])?`, + `simple_alloc::allocate`, +}, `|`) + +var allocSkipRxStr = strings.Join([]string{ + // Preserve Go runtime frames that appear in the middle/bottom of + // the stack. + `runtime\.panic`, + `runtime\.reflectcall`, + `runtime\.call[0-9]*`, +}, `|`) + +var cpuProfilerRxStr = strings.Join([]string{ + `ProfileData::Add`, + `ProfileData::prof_handler`, + `CpuProfiler::prof_handler`, + `__pthread_sighandler`, + `__restore`, +}, `|`) + +var lockRxStr = strings.Join([]string{ + `RecordLockProfileData`, + `(base::)?RecordLockProfileData.*`, + `(base::)?SubmitMutexProfileData.*`, + `(base::)?SubmitSpinLockProfileData.*`, + `(base::Mutex::)?AwaitCommon.*`, + `(base::Mutex::)?Unlock.*`, + `(base::Mutex::)?UnlockSlow.*`, + `(base::Mutex::)?ReaderUnlock.*`, + `(base::MutexLock::)?~MutexLock.*`, + `(Mutex::)?AwaitCommon.*`, + `(Mutex::)?Unlock.*`, + `(Mutex::)?UnlockSlow.*`, + `(Mutex::)?ReaderUnlock.*`, + `(MutexLock::)?~MutexLock.*`, + `(SpinLock::)?Unlock.*`, + `(SpinLock::)?SlowUnlock.*`, + `(SpinLockHolder::)?~SpinLockHolder.*`, +}, `|`) diff --git a/backend/vendor/github.com/google/pprof/profile/merge.go b/backend/vendor/github.com/google/pprof/profile/merge.go new file mode 100644 index 0000000..ba4d746 --- /dev/null +++ b/backend/vendor/github.com/google/pprof/profile/merge.go @@ -0,0 +1,674 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package profile + +import ( + "encoding/binary" + "fmt" + "sort" + "strconv" + "strings" +) + +// Compact performs garbage collection on a profile to remove any +// unreferenced fields. This is useful to reduce the size of a profile +// after samples or locations have been removed. +func (p *Profile) Compact() *Profile { + p, _ = Merge([]*Profile{p}) + return p +} + +// Merge merges all the profiles in profs into a single Profile. +// Returns a new profile independent of the input profiles. The merged +// profile is compacted to eliminate unused samples, locations, +// functions and mappings. Profiles must have identical profile sample +// and period types or the merge will fail. profile.Period of the +// resulting profile will be the maximum of all profiles, and +// profile.TimeNanos will be the earliest nonzero one. Merges are +// associative with the caveat of the first profile having some +// specialization in how headers are combined. There may be other +// subtleties now or in the future regarding associativity. +func Merge(srcs []*Profile) (*Profile, error) { + if len(srcs) == 0 { + return nil, fmt.Errorf("no profiles to merge") + } + p, err := combineHeaders(srcs) + if err != nil { + return nil, err + } + + pm := &profileMerger{ + p: p, + samples: make(map[sampleKey]*Sample, len(srcs[0].Sample)), + locations: make(map[locationKey]*Location, len(srcs[0].Location)), + functions: make(map[functionKey]*Function, len(srcs[0].Function)), + mappings: make(map[mappingKey]*Mapping, len(srcs[0].Mapping)), + } + + for _, src := range srcs { + // Clear the profile-specific hash tables + pm.locationsByID = makeLocationIDMap(len(src.Location)) + pm.functionsByID = make(map[uint64]*Function, len(src.Function)) + pm.mappingsByID = make(map[uint64]mapInfo, len(src.Mapping)) + + if len(pm.mappings) == 0 && len(src.Mapping) > 0 { + // The Mapping list has the property that the first mapping + // represents the main binary. Take the first Mapping we see, + // otherwise the operations below will add mappings in an + // arbitrary order. + pm.mapMapping(src.Mapping[0]) + } + + for _, s := range src.Sample { + if !isZeroSample(s) { + pm.mapSample(s) + } + } + } + + for _, s := range p.Sample { + if isZeroSample(s) { + // If there are any zero samples, re-merge the profile to GC + // them. + return Merge([]*Profile{p}) + } + } + + return p, nil +} + +// Normalize normalizes the source profile by multiplying each value in profile by the +// ratio of the sum of the base profile's values of that sample type to the sum of the +// source profile's value of that sample type. +func (p *Profile) Normalize(pb *Profile) error { + + if err := p.compatible(pb); err != nil { + return err + } + + baseVals := make([]int64, len(p.SampleType)) + for _, s := range pb.Sample { + for i, v := range s.Value { + baseVals[i] += v + } + } + + srcVals := make([]int64, len(p.SampleType)) + for _, s := range p.Sample { + for i, v := range s.Value { + srcVals[i] += v + } + } + + normScale := make([]float64, len(baseVals)) + for i := range baseVals { + if srcVals[i] == 0 { + normScale[i] = 0.0 + } else { + normScale[i] = float64(baseVals[i]) / float64(srcVals[i]) + } + } + p.ScaleN(normScale) + return nil +} + +func isZeroSample(s *Sample) bool { + for _, v := range s.Value { + if v != 0 { + return false + } + } + return true +} + +type profileMerger struct { + p *Profile + + // Memoization tables within a profile. + locationsByID locationIDMap + functionsByID map[uint64]*Function + mappingsByID map[uint64]mapInfo + + // Memoization tables for profile entities. + samples map[sampleKey]*Sample + locations map[locationKey]*Location + functions map[functionKey]*Function + mappings map[mappingKey]*Mapping +} + +type mapInfo struct { + m *Mapping + offset int64 +} + +func (pm *profileMerger) mapSample(src *Sample) *Sample { + // Check memoization table + k := pm.sampleKey(src) + if ss, ok := pm.samples[k]; ok { + for i, v := range src.Value { + ss.Value[i] += v + } + return ss + } + + // Make new sample. + s := &Sample{ + Location: make([]*Location, len(src.Location)), + Value: make([]int64, len(src.Value)), + Label: make(map[string][]string, len(src.Label)), + NumLabel: make(map[string][]int64, len(src.NumLabel)), + NumUnit: make(map[string][]string, len(src.NumLabel)), + } + for i, l := range src.Location { + s.Location[i] = pm.mapLocation(l) + } + for k, v := range src.Label { + vv := make([]string, len(v)) + copy(vv, v) + s.Label[k] = vv + } + for k, v := range src.NumLabel { + u := src.NumUnit[k] + vv := make([]int64, len(v)) + uu := make([]string, len(u)) + copy(vv, v) + copy(uu, u) + s.NumLabel[k] = vv + s.NumUnit[k] = uu + } + copy(s.Value, src.Value) + pm.samples[k] = s + pm.p.Sample = append(pm.p.Sample, s) + return s +} + +func (pm *profileMerger) sampleKey(sample *Sample) sampleKey { + // Accumulate contents into a string. + var buf strings.Builder + buf.Grow(64) // Heuristic to avoid extra allocs + + // encode a number + putNumber := func(v uint64) { + var num [binary.MaxVarintLen64]byte + n := binary.PutUvarint(num[:], v) + buf.Write(num[:n]) + } + + // encode a string prefixed with its length. + putDelimitedString := func(s string) { + putNumber(uint64(len(s))) + buf.WriteString(s) + } + + for _, l := range sample.Location { + // Get the location in the merged profile, which may have a different ID. + if loc := pm.mapLocation(l); loc != nil { + putNumber(loc.ID) + } + } + putNumber(0) // Delimiter + + for _, l := range sortedKeys1(sample.Label) { + putDelimitedString(l) + values := sample.Label[l] + putNumber(uint64(len(values))) + for _, v := range values { + putDelimitedString(v) + } + } + + for _, l := range sortedKeys2(sample.NumLabel) { + putDelimitedString(l) + values := sample.NumLabel[l] + putNumber(uint64(len(values))) + for _, v := range values { + putNumber(uint64(v)) + } + units := sample.NumUnit[l] + putNumber(uint64(len(units))) + for _, v := range units { + putDelimitedString(v) + } + } + + return sampleKey(buf.String()) +} + +type sampleKey string + +// sortedKeys1 returns the sorted keys found in a string->[]string map. +// +// Note: this is currently non-generic since github pprof runs golint, +// which does not support generics. When that issue is fixed, it can +// be merged with sortedKeys2 and made into a generic function. +func sortedKeys1(m map[string][]string) []string { + if len(m) == 0 { + return nil + } + keys := make([]string, 0, len(m)) + for k := range m { + keys = append(keys, k) + } + sort.Strings(keys) + return keys +} + +// sortedKeys2 returns the sorted keys found in a string->[]int64 map. +// +// Note: this is currently non-generic since github pprof runs golint, +// which does not support generics. When that issue is fixed, it can +// be merged with sortedKeys1 and made into a generic function. +func sortedKeys2(m map[string][]int64) []string { + if len(m) == 0 { + return nil + } + keys := make([]string, 0, len(m)) + for k := range m { + keys = append(keys, k) + } + sort.Strings(keys) + return keys +} + +func (pm *profileMerger) mapLocation(src *Location) *Location { + if src == nil { + return nil + } + + if l := pm.locationsByID.get(src.ID); l != nil { + return l + } + + mi := pm.mapMapping(src.Mapping) + l := &Location{ + ID: uint64(len(pm.p.Location) + 1), + Mapping: mi.m, + Address: uint64(int64(src.Address) + mi.offset), + Line: make([]Line, len(src.Line)), + IsFolded: src.IsFolded, + } + for i, ln := range src.Line { + l.Line[i] = pm.mapLine(ln) + } + // Check memoization table. Must be done on the remapped location to + // account for the remapped mapping ID. + k := l.key() + if ll, ok := pm.locations[k]; ok { + pm.locationsByID.set(src.ID, ll) + return ll + } + pm.locationsByID.set(src.ID, l) + pm.locations[k] = l + pm.p.Location = append(pm.p.Location, l) + return l +} + +// key generates locationKey to be used as a key for maps. +func (l *Location) key() locationKey { + key := locationKey{ + addr: l.Address, + isFolded: l.IsFolded, + } + if l.Mapping != nil { + // Normalizes address to handle address space randomization. + key.addr -= l.Mapping.Start + key.mappingID = l.Mapping.ID + } + lines := make([]string, len(l.Line)*3) + for i, line := range l.Line { + if line.Function != nil { + lines[i*2] = strconv.FormatUint(line.Function.ID, 16) + } + lines[i*2+1] = strconv.FormatInt(line.Line, 16) + lines[i*2+2] = strconv.FormatInt(line.Column, 16) + } + key.lines = strings.Join(lines, "|") + return key +} + +type locationKey struct { + addr, mappingID uint64 + lines string + isFolded bool +} + +func (pm *profileMerger) mapMapping(src *Mapping) mapInfo { + if src == nil { + return mapInfo{} + } + + if mi, ok := pm.mappingsByID[src.ID]; ok { + return mi + } + + // Check memoization tables. + mk := src.key() + if m, ok := pm.mappings[mk]; ok { + mi := mapInfo{m, int64(m.Start) - int64(src.Start)} + pm.mappingsByID[src.ID] = mi + return mi + } + m := &Mapping{ + ID: uint64(len(pm.p.Mapping) + 1), + Start: src.Start, + Limit: src.Limit, + Offset: src.Offset, + File: src.File, + KernelRelocationSymbol: src.KernelRelocationSymbol, + BuildID: src.BuildID, + HasFunctions: src.HasFunctions, + HasFilenames: src.HasFilenames, + HasLineNumbers: src.HasLineNumbers, + HasInlineFrames: src.HasInlineFrames, + } + pm.p.Mapping = append(pm.p.Mapping, m) + + // Update memoization tables. + pm.mappings[mk] = m + mi := mapInfo{m, 0} + pm.mappingsByID[src.ID] = mi + return mi +} + +// key generates encoded strings of Mapping to be used as a key for +// maps. +func (m *Mapping) key() mappingKey { + // Normalize addresses to handle address space randomization. + // Round up to next 4K boundary to avoid minor discrepancies. + const mapsizeRounding = 0x1000 + + size := m.Limit - m.Start + size = size + mapsizeRounding - 1 + size = size - (size % mapsizeRounding) + key := mappingKey{ + size: size, + offset: m.Offset, + } + + switch { + case m.BuildID != "": + key.buildIDOrFile = m.BuildID + case m.File != "": + key.buildIDOrFile = m.File + default: + // A mapping containing neither build ID nor file name is a fake mapping. A + // key with empty buildIDOrFile is used for fake mappings so that they are + // treated as the same mapping during merging. + } + return key +} + +type mappingKey struct { + size, offset uint64 + buildIDOrFile string +} + +func (pm *profileMerger) mapLine(src Line) Line { + ln := Line{ + Function: pm.mapFunction(src.Function), + Line: src.Line, + Column: src.Column, + } + return ln +} + +func (pm *profileMerger) mapFunction(src *Function) *Function { + if src == nil { + return nil + } + if f, ok := pm.functionsByID[src.ID]; ok { + return f + } + k := src.key() + if f, ok := pm.functions[k]; ok { + pm.functionsByID[src.ID] = f + return f + } + f := &Function{ + ID: uint64(len(pm.p.Function) + 1), + Name: src.Name, + SystemName: src.SystemName, + Filename: src.Filename, + StartLine: src.StartLine, + } + pm.functions[k] = f + pm.functionsByID[src.ID] = f + pm.p.Function = append(pm.p.Function, f) + return f +} + +// key generates a struct to be used as a key for maps. +func (f *Function) key() functionKey { + return functionKey{ + f.StartLine, + f.Name, + f.SystemName, + f.Filename, + } +} + +type functionKey struct { + startLine int64 + name, systemName, fileName string +} + +// combineHeaders checks that all profiles can be merged and returns +// their combined profile. +func combineHeaders(srcs []*Profile) (*Profile, error) { + for _, s := range srcs[1:] { + if err := srcs[0].compatible(s); err != nil { + return nil, err + } + } + + var timeNanos, durationNanos, period int64 + var comments []string + seenComments := map[string]bool{} + var docURL string + var defaultSampleType string + for _, s := range srcs { + if timeNanos == 0 || s.TimeNanos < timeNanos { + timeNanos = s.TimeNanos + } + durationNanos += s.DurationNanos + if period == 0 || period < s.Period { + period = s.Period + } + for _, c := range s.Comments { + if seen := seenComments[c]; !seen { + comments = append(comments, c) + seenComments[c] = true + } + } + if defaultSampleType == "" { + defaultSampleType = s.DefaultSampleType + } + if docURL == "" { + docURL = s.DocURL + } + } + + p := &Profile{ + SampleType: make([]*ValueType, len(srcs[0].SampleType)), + + DropFrames: srcs[0].DropFrames, + KeepFrames: srcs[0].KeepFrames, + + TimeNanos: timeNanos, + DurationNanos: durationNanos, + PeriodType: srcs[0].PeriodType, + Period: period, + + Comments: comments, + DefaultSampleType: defaultSampleType, + DocURL: docURL, + } + copy(p.SampleType, srcs[0].SampleType) + return p, nil +} + +// compatible determines if two profiles can be compared/merged. +// returns nil if the profiles are compatible; otherwise an error with +// details on the incompatibility. +func (p *Profile) compatible(pb *Profile) error { + if !equalValueType(p.PeriodType, pb.PeriodType) { + return fmt.Errorf("incompatible period types %v and %v", p.PeriodType, pb.PeriodType) + } + + if len(p.SampleType) != len(pb.SampleType) { + return fmt.Errorf("incompatible sample types %v and %v", p.SampleType, pb.SampleType) + } + + for i := range p.SampleType { + if !equalValueType(p.SampleType[i], pb.SampleType[i]) { + return fmt.Errorf("incompatible sample types %v and %v", p.SampleType, pb.SampleType) + } + } + return nil +} + +// equalValueType returns true if the two value types are semantically +// equal. It ignores the internal fields used during encode/decode. +func equalValueType(st1, st2 *ValueType) bool { + return st1.Type == st2.Type && st1.Unit == st2.Unit +} + +// locationIDMap is like a map[uint64]*Location, but provides efficiency for +// ids that are densely numbered, which is often the case. +type locationIDMap struct { + dense []*Location // indexed by id for id < len(dense) + sparse map[uint64]*Location // indexed by id for id >= len(dense) +} + +func makeLocationIDMap(n int) locationIDMap { + return locationIDMap{ + dense: make([]*Location, n), + sparse: map[uint64]*Location{}, + } +} + +func (lm locationIDMap) get(id uint64) *Location { + if id < uint64(len(lm.dense)) { + return lm.dense[int(id)] + } + return lm.sparse[id] +} + +func (lm locationIDMap) set(id uint64, loc *Location) { + if id < uint64(len(lm.dense)) { + lm.dense[id] = loc + return + } + lm.sparse[id] = loc +} + +// CompatibilizeSampleTypes makes profiles compatible to be compared/merged. It +// keeps sample types that appear in all profiles only and drops/reorders the +// sample types as necessary. +// +// In the case of sample types order is not the same for given profiles the +// order is derived from the first profile. +// +// Profiles are modified in-place. +// +// It returns an error if the sample type's intersection is empty. +func CompatibilizeSampleTypes(ps []*Profile) error { + sTypes := commonSampleTypes(ps) + if len(sTypes) == 0 { + return fmt.Errorf("profiles have empty common sample type list") + } + for _, p := range ps { + if err := compatibilizeSampleTypes(p, sTypes); err != nil { + return err + } + } + return nil +} + +// commonSampleTypes returns sample types that appear in all profiles in the +// order how they ordered in the first profile. +func commonSampleTypes(ps []*Profile) []string { + if len(ps) == 0 { + return nil + } + sTypes := map[string]int{} + for _, p := range ps { + for _, st := range p.SampleType { + sTypes[st.Type]++ + } + } + var res []string + for _, st := range ps[0].SampleType { + if sTypes[st.Type] == len(ps) { + res = append(res, st.Type) + } + } + return res +} + +// compatibilizeSampleTypes drops sample types that are not present in sTypes +// list and reorder them if needed. +// +// It sets DefaultSampleType to sType[0] if it is not in sType list. +// +// It assumes that all sample types from the sTypes list are present in the +// given profile otherwise it returns an error. +func compatibilizeSampleTypes(p *Profile, sTypes []string) error { + if len(sTypes) == 0 { + return fmt.Errorf("sample type list is empty") + } + defaultSampleType := sTypes[0] + reMap, needToModify := make([]int, len(sTypes)), false + for i, st := range sTypes { + if st == p.DefaultSampleType { + defaultSampleType = p.DefaultSampleType + } + idx := searchValueType(p.SampleType, st) + if idx < 0 { + return fmt.Errorf("%q sample type is not found in profile", st) + } + reMap[i] = idx + if idx != i { + needToModify = true + } + } + if !needToModify && len(sTypes) == len(p.SampleType) { + return nil + } + p.DefaultSampleType = defaultSampleType + oldSampleTypes := p.SampleType + p.SampleType = make([]*ValueType, len(sTypes)) + for i, idx := range reMap { + p.SampleType[i] = oldSampleTypes[idx] + } + values := make([]int64, len(sTypes)) + for _, s := range p.Sample { + for i, idx := range reMap { + values[i] = s.Value[idx] + } + s.Value = s.Value[:len(values)] + copy(s.Value, values) + } + return nil +} + +func searchValueType(vts []*ValueType, s string) int { + for i, vt := range vts { + if vt.Type == s { + return i + } + } + return -1 +} diff --git a/backend/vendor/github.com/google/pprof/profile/profile.go b/backend/vendor/github.com/google/pprof/profile/profile.go new file mode 100644 index 0000000..f47a243 --- /dev/null +++ b/backend/vendor/github.com/google/pprof/profile/profile.go @@ -0,0 +1,869 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package profile provides a representation of profile.proto and +// methods to encode/decode profiles in this format. +package profile + +import ( + "bytes" + "compress/gzip" + "fmt" + "io" + "math" + "path/filepath" + "regexp" + "sort" + "strings" + "sync" + "time" +) + +// Profile is an in-memory representation of profile.proto. +type Profile struct { + SampleType []*ValueType + DefaultSampleType string + Sample []*Sample + Mapping []*Mapping + Location []*Location + Function []*Function + Comments []string + DocURL string + + DropFrames string + KeepFrames string + + TimeNanos int64 + DurationNanos int64 + PeriodType *ValueType + Period int64 + + // The following fields are modified during encoding and copying, + // so are protected by a Mutex. + encodeMu sync.Mutex + + commentX []int64 + docURLX int64 + dropFramesX int64 + keepFramesX int64 + stringTable []string + defaultSampleTypeX int64 +} + +// ValueType corresponds to Profile.ValueType +type ValueType struct { + Type string // cpu, wall, inuse_space, etc + Unit string // seconds, nanoseconds, bytes, etc + + typeX int64 + unitX int64 +} + +// Sample corresponds to Profile.Sample +type Sample struct { + Location []*Location + Value []int64 + // Label is a per-label-key map to values for string labels. + // + // In general, having multiple values for the given label key is strongly + // discouraged - see docs for the sample label field in profile.proto. The + // main reason this unlikely state is tracked here is to make the + // decoding->encoding roundtrip not lossy. But we expect that the value + // slices present in this map are always of length 1. + Label map[string][]string + // NumLabel is a per-label-key map to values for numeric labels. See a note + // above on handling multiple values for a label. + NumLabel map[string][]int64 + // NumUnit is a per-label-key map to the unit names of corresponding numeric + // label values. The unit info may be missing even if the label is in + // NumLabel, see the docs in profile.proto for details. When the value is + // slice is present and not nil, its length must be equal to the length of + // the corresponding value slice in NumLabel. + NumUnit map[string][]string + + locationIDX []uint64 + labelX []label +} + +// label corresponds to Profile.Label +type label struct { + keyX int64 + // Exactly one of the two following values must be set + strX int64 + numX int64 // Integer value for this label + // can be set if numX has value + unitX int64 +} + +// Mapping corresponds to Profile.Mapping +type Mapping struct { + ID uint64 + Start uint64 + Limit uint64 + Offset uint64 + File string + BuildID string + HasFunctions bool + HasFilenames bool + HasLineNumbers bool + HasInlineFrames bool + + fileX int64 + buildIDX int64 + + // Name of the kernel relocation symbol ("_text" or "_stext"), extracted from File. + // For linux kernel mappings generated by some tools, correct symbolization depends + // on knowing which of the two possible relocation symbols was used for `Start`. + // This is given to us as a suffix in `File` (e.g. "[kernel.kallsyms]_stext"). + // + // Note, this public field is not persisted in the proto. For the purposes of + // copying / merging / hashing profiles, it is considered subsumed by `File`. + KernelRelocationSymbol string +} + +// Location corresponds to Profile.Location +type Location struct { + ID uint64 + Mapping *Mapping + Address uint64 + Line []Line + IsFolded bool + + mappingIDX uint64 +} + +// Line corresponds to Profile.Line +type Line struct { + Function *Function + Line int64 + Column int64 + + functionIDX uint64 +} + +// Function corresponds to Profile.Function +type Function struct { + ID uint64 + Name string + SystemName string + Filename string + StartLine int64 + + nameX int64 + systemNameX int64 + filenameX int64 +} + +// Parse parses a profile and checks for its validity. The input +// may be a gzip-compressed encoded protobuf or one of many legacy +// profile formats which may be unsupported in the future. +func Parse(r io.Reader) (*Profile, error) { + data, err := io.ReadAll(r) + if err != nil { + return nil, err + } + return ParseData(data) +} + +// ParseData parses a profile from a buffer and checks for its +// validity. +func ParseData(data []byte) (*Profile, error) { + var p *Profile + var err error + if len(data) >= 2 && data[0] == 0x1f && data[1] == 0x8b { + gz, err := gzip.NewReader(bytes.NewBuffer(data)) + if err == nil { + data, err = io.ReadAll(gz) + } + if err != nil { + return nil, fmt.Errorf("decompressing profile: %v", err) + } + } + if p, err = ParseUncompressed(data); err != nil && err != errNoData && err != errConcatProfile { + p, err = parseLegacy(data) + } + + if err != nil { + return nil, fmt.Errorf("parsing profile: %v", err) + } + + if err := p.CheckValid(); err != nil { + return nil, fmt.Errorf("malformed profile: %v", err) + } + return p, nil +} + +var errUnrecognized = fmt.Errorf("unrecognized profile format") +var errMalformed = fmt.Errorf("malformed profile format") +var errNoData = fmt.Errorf("empty input file") +var errConcatProfile = fmt.Errorf("concatenated profiles detected") + +func parseLegacy(data []byte) (*Profile, error) { + parsers := []func([]byte) (*Profile, error){ + parseCPU, + parseHeap, + parseGoCount, // goroutine, threadcreate + parseThread, + parseContention, + parseJavaProfile, + } + + for _, parser := range parsers { + p, err := parser(data) + if err == nil { + p.addLegacyFrameInfo() + return p, nil + } + if err != errUnrecognized { + return nil, err + } + } + return nil, errUnrecognized +} + +// ParseUncompressed parses an uncompressed protobuf into a profile. +func ParseUncompressed(data []byte) (*Profile, error) { + if len(data) == 0 { + return nil, errNoData + } + p := &Profile{} + if err := unmarshal(data, p); err != nil { + return nil, err + } + + if err := p.postDecode(); err != nil { + return nil, err + } + + return p, nil +} + +var libRx = regexp.MustCompile(`([.]so$|[.]so[._][0-9]+)`) + +// massageMappings applies heuristic-based changes to the profile +// mappings to account for quirks of some environments. +func (p *Profile) massageMappings() { + // Merge adjacent regions with matching names, checking that the offsets match + if len(p.Mapping) > 1 { + mappings := []*Mapping{p.Mapping[0]} + for _, m := range p.Mapping[1:] { + lm := mappings[len(mappings)-1] + if adjacent(lm, m) { + lm.Limit = m.Limit + if m.File != "" { + lm.File = m.File + } + if m.BuildID != "" { + lm.BuildID = m.BuildID + } + p.updateLocationMapping(m, lm) + continue + } + mappings = append(mappings, m) + } + p.Mapping = mappings + } + + // Use heuristics to identify main binary and move it to the top of the list of mappings + for i, m := range p.Mapping { + file := strings.TrimSpace(strings.Replace(m.File, "(deleted)", "", -1)) + if len(file) == 0 { + continue + } + if len(libRx.FindStringSubmatch(file)) > 0 { + continue + } + if file[0] == '[' { + continue + } + // Swap what we guess is main to position 0. + p.Mapping[0], p.Mapping[i] = p.Mapping[i], p.Mapping[0] + break + } + + // Keep the mapping IDs neatly sorted + for i, m := range p.Mapping { + m.ID = uint64(i + 1) + } +} + +// adjacent returns whether two mapping entries represent the same +// mapping that has been split into two. Check that their addresses are adjacent, +// and if the offsets match, if they are available. +func adjacent(m1, m2 *Mapping) bool { + if m1.File != "" && m2.File != "" { + if m1.File != m2.File { + return false + } + } + if m1.BuildID != "" && m2.BuildID != "" { + if m1.BuildID != m2.BuildID { + return false + } + } + if m1.Limit != m2.Start { + return false + } + if m1.Offset != 0 && m2.Offset != 0 { + offset := m1.Offset + (m1.Limit - m1.Start) + if offset != m2.Offset { + return false + } + } + return true +} + +func (p *Profile) updateLocationMapping(from, to *Mapping) { + for _, l := range p.Location { + if l.Mapping == from { + l.Mapping = to + } + } +} + +func serialize(p *Profile) []byte { + p.encodeMu.Lock() + p.preEncode() + b := marshal(p) + p.encodeMu.Unlock() + return b +} + +// Write writes the profile as a gzip-compressed marshaled protobuf. +func (p *Profile) Write(w io.Writer) error { + zw := gzip.NewWriter(w) + defer zw.Close() + _, err := zw.Write(serialize(p)) + return err +} + +// WriteUncompressed writes the profile as a marshaled protobuf. +func (p *Profile) WriteUncompressed(w io.Writer) error { + _, err := w.Write(serialize(p)) + return err +} + +// CheckValid tests whether the profile is valid. Checks include, but are +// not limited to: +// - len(Profile.Sample[n].value) == len(Profile.value_unit) +// - Sample.id has a corresponding Profile.Location +func (p *Profile) CheckValid() error { + // Check that sample values are consistent + sampleLen := len(p.SampleType) + if sampleLen == 0 && len(p.Sample) != 0 { + return fmt.Errorf("missing sample type information") + } + for _, s := range p.Sample { + if s == nil { + return fmt.Errorf("profile has nil sample") + } + if len(s.Value) != sampleLen { + return fmt.Errorf("mismatch: sample has %d values vs. %d types", len(s.Value), len(p.SampleType)) + } + for _, l := range s.Location { + if l == nil { + return fmt.Errorf("sample has nil location") + } + } + } + + // Check that all mappings/locations/functions are in the tables + // Check that there are no duplicate ids + mappings := make(map[uint64]*Mapping, len(p.Mapping)) + for _, m := range p.Mapping { + if m == nil { + return fmt.Errorf("profile has nil mapping") + } + if m.ID == 0 { + return fmt.Errorf("found mapping with reserved ID=0") + } + if mappings[m.ID] != nil { + return fmt.Errorf("multiple mappings with same id: %d", m.ID) + } + mappings[m.ID] = m + } + functions := make(map[uint64]*Function, len(p.Function)) + for _, f := range p.Function { + if f == nil { + return fmt.Errorf("profile has nil function") + } + if f.ID == 0 { + return fmt.Errorf("found function with reserved ID=0") + } + if functions[f.ID] != nil { + return fmt.Errorf("multiple functions with same id: %d", f.ID) + } + functions[f.ID] = f + } + locations := make(map[uint64]*Location, len(p.Location)) + for _, l := range p.Location { + if l == nil { + return fmt.Errorf("profile has nil location") + } + if l.ID == 0 { + return fmt.Errorf("found location with reserved id=0") + } + if locations[l.ID] != nil { + return fmt.Errorf("multiple locations with same id: %d", l.ID) + } + locations[l.ID] = l + if m := l.Mapping; m != nil { + if m.ID == 0 || mappings[m.ID] != m { + return fmt.Errorf("inconsistent mapping %p: %d", m, m.ID) + } + } + for _, ln := range l.Line { + f := ln.Function + if f == nil { + return fmt.Errorf("location id: %d has a line with nil function", l.ID) + } + if f.ID == 0 || functions[f.ID] != f { + return fmt.Errorf("inconsistent function %p: %d", f, f.ID) + } + } + } + return nil +} + +// Aggregate merges the locations in the profile into equivalence +// classes preserving the request attributes. It also updates the +// samples to point to the merged locations. +func (p *Profile) Aggregate(inlineFrame, function, filename, linenumber, columnnumber, address bool) error { + for _, m := range p.Mapping { + m.HasInlineFrames = m.HasInlineFrames && inlineFrame + m.HasFunctions = m.HasFunctions && function + m.HasFilenames = m.HasFilenames && filename + m.HasLineNumbers = m.HasLineNumbers && linenumber + } + + // Aggregate functions + if !function || !filename { + for _, f := range p.Function { + if !function { + f.Name = "" + f.SystemName = "" + } + if !filename { + f.Filename = "" + } + } + } + + // Aggregate locations + if !inlineFrame || !address || !linenumber || !columnnumber { + for _, l := range p.Location { + if !inlineFrame && len(l.Line) > 1 { + l.Line = l.Line[len(l.Line)-1:] + } + if !linenumber { + for i := range l.Line { + l.Line[i].Line = 0 + l.Line[i].Column = 0 + } + } + if !columnnumber { + for i := range l.Line { + l.Line[i].Column = 0 + } + } + if !address { + l.Address = 0 + } + } + } + + return p.CheckValid() +} + +// NumLabelUnits returns a map of numeric label keys to the units +// associated with those keys and a map of those keys to any units +// that were encountered but not used. +// Unit for a given key is the first encountered unit for that key. If multiple +// units are encountered for values paired with a particular key, then the first +// unit encountered is used and all other units are returned in sorted order +// in map of ignored units. +// If no units are encountered for a particular key, the unit is then inferred +// based on the key. +func (p *Profile) NumLabelUnits() (map[string]string, map[string][]string) { + numLabelUnits := map[string]string{} + ignoredUnits := map[string]map[string]bool{} + encounteredKeys := map[string]bool{} + + // Determine units based on numeric tags for each sample. + for _, s := range p.Sample { + for k := range s.NumLabel { + encounteredKeys[k] = true + for _, unit := range s.NumUnit[k] { + if unit == "" { + continue + } + if wantUnit, ok := numLabelUnits[k]; !ok { + numLabelUnits[k] = unit + } else if wantUnit != unit { + if v, ok := ignoredUnits[k]; ok { + v[unit] = true + } else { + ignoredUnits[k] = map[string]bool{unit: true} + } + } + } + } + } + // Infer units for keys without any units associated with + // numeric tag values. + for key := range encounteredKeys { + unit := numLabelUnits[key] + if unit == "" { + switch key { + case "alignment", "request": + numLabelUnits[key] = "bytes" + default: + numLabelUnits[key] = key + } + } + } + + // Copy ignored units into more readable format + unitsIgnored := make(map[string][]string, len(ignoredUnits)) + for key, values := range ignoredUnits { + units := make([]string, len(values)) + i := 0 + for unit := range values { + units[i] = unit + i++ + } + sort.Strings(units) + unitsIgnored[key] = units + } + + return numLabelUnits, unitsIgnored +} + +// String dumps a text representation of a profile. Intended mainly +// for debugging purposes. +func (p *Profile) String() string { + ss := make([]string, 0, len(p.Comments)+len(p.Sample)+len(p.Mapping)+len(p.Location)) + for _, c := range p.Comments { + ss = append(ss, "Comment: "+c) + } + if url := p.DocURL; url != "" { + ss = append(ss, fmt.Sprintf("Doc: %s", url)) + } + if pt := p.PeriodType; pt != nil { + ss = append(ss, fmt.Sprintf("PeriodType: %s %s", pt.Type, pt.Unit)) + } + ss = append(ss, fmt.Sprintf("Period: %d", p.Period)) + if p.TimeNanos != 0 { + ss = append(ss, fmt.Sprintf("Time: %v", time.Unix(0, p.TimeNanos))) + } + if p.DurationNanos != 0 { + ss = append(ss, fmt.Sprintf("Duration: %.4v", time.Duration(p.DurationNanos))) + } + + ss = append(ss, "Samples:") + var sh1 string + for _, s := range p.SampleType { + dflt := "" + if s.Type == p.DefaultSampleType { + dflt = "[dflt]" + } + sh1 = sh1 + fmt.Sprintf("%s/%s%s ", s.Type, s.Unit, dflt) + } + ss = append(ss, strings.TrimSpace(sh1)) + for _, s := range p.Sample { + ss = append(ss, s.string()) + } + + ss = append(ss, "Locations") + for _, l := range p.Location { + ss = append(ss, l.string()) + } + + ss = append(ss, "Mappings") + for _, m := range p.Mapping { + ss = append(ss, m.string()) + } + + return strings.Join(ss, "\n") + "\n" +} + +// string dumps a text representation of a mapping. Intended mainly +// for debugging purposes. +func (m *Mapping) string() string { + bits := "" + if m.HasFunctions { + bits = bits + "[FN]" + } + if m.HasFilenames { + bits = bits + "[FL]" + } + if m.HasLineNumbers { + bits = bits + "[LN]" + } + if m.HasInlineFrames { + bits = bits + "[IN]" + } + return fmt.Sprintf("%d: %#x/%#x/%#x %s %s %s", + m.ID, + m.Start, m.Limit, m.Offset, + m.File, + m.BuildID, + bits) +} + +// string dumps a text representation of a location. Intended mainly +// for debugging purposes. +func (l *Location) string() string { + ss := []string{} + locStr := fmt.Sprintf("%6d: %#x ", l.ID, l.Address) + if m := l.Mapping; m != nil { + locStr = locStr + fmt.Sprintf("M=%d ", m.ID) + } + if l.IsFolded { + locStr = locStr + "[F] " + } + if len(l.Line) == 0 { + ss = append(ss, locStr) + } + for li := range l.Line { + lnStr := "??" + if fn := l.Line[li].Function; fn != nil { + lnStr = fmt.Sprintf("%s %s:%d:%d s=%d", + fn.Name, + fn.Filename, + l.Line[li].Line, + l.Line[li].Column, + fn.StartLine) + if fn.Name != fn.SystemName { + lnStr = lnStr + "(" + fn.SystemName + ")" + } + } + ss = append(ss, locStr+lnStr) + // Do not print location details past the first line + locStr = " " + } + return strings.Join(ss, "\n") +} + +// string dumps a text representation of a sample. Intended mainly +// for debugging purposes. +func (s *Sample) string() string { + ss := []string{} + var sv string + for _, v := range s.Value { + sv = fmt.Sprintf("%s %10d", sv, v) + } + sv = sv + ": " + for _, l := range s.Location { + sv = sv + fmt.Sprintf("%d ", l.ID) + } + ss = append(ss, sv) + const labelHeader = " " + if len(s.Label) > 0 { + ss = append(ss, labelHeader+labelsToString(s.Label)) + } + if len(s.NumLabel) > 0 { + ss = append(ss, labelHeader+numLabelsToString(s.NumLabel, s.NumUnit)) + } + return strings.Join(ss, "\n") +} + +// labelsToString returns a string representation of a +// map representing labels. +func labelsToString(labels map[string][]string) string { + ls := []string{} + for k, v := range labels { + ls = append(ls, fmt.Sprintf("%s:%v", k, v)) + } + sort.Strings(ls) + return strings.Join(ls, " ") +} + +// numLabelsToString returns a string representation of a map +// representing numeric labels. +func numLabelsToString(numLabels map[string][]int64, numUnits map[string][]string) string { + ls := []string{} + for k, v := range numLabels { + units := numUnits[k] + var labelString string + if len(units) == len(v) { + values := make([]string, len(v)) + for i, vv := range v { + values[i] = fmt.Sprintf("%d %s", vv, units[i]) + } + labelString = fmt.Sprintf("%s:%v", k, values) + } else { + labelString = fmt.Sprintf("%s:%v", k, v) + } + ls = append(ls, labelString) + } + sort.Strings(ls) + return strings.Join(ls, " ") +} + +// SetLabel sets the specified key to the specified value for all samples in the +// profile. +func (p *Profile) SetLabel(key string, value []string) { + for _, sample := range p.Sample { + if sample.Label == nil { + sample.Label = map[string][]string{key: value} + } else { + sample.Label[key] = value + } + } +} + +// RemoveLabel removes all labels associated with the specified key for all +// samples in the profile. +func (p *Profile) RemoveLabel(key string) { + for _, sample := range p.Sample { + delete(sample.Label, key) + } +} + +// HasLabel returns true if a sample has a label with indicated key and value. +func (s *Sample) HasLabel(key, value string) bool { + for _, v := range s.Label[key] { + if v == value { + return true + } + } + return false +} + +// SetNumLabel sets the specified key to the specified value for all samples in the +// profile. "unit" is a slice that describes the units that each corresponding member +// of "values" is measured in (e.g. bytes or seconds). If there is no relevant +// unit for a given value, that member of "unit" should be the empty string. +// "unit" must either have the same length as "value", or be nil. +func (p *Profile) SetNumLabel(key string, value []int64, unit []string) { + for _, sample := range p.Sample { + if sample.NumLabel == nil { + sample.NumLabel = map[string][]int64{key: value} + } else { + sample.NumLabel[key] = value + } + if sample.NumUnit == nil { + sample.NumUnit = map[string][]string{key: unit} + } else { + sample.NumUnit[key] = unit + } + } +} + +// RemoveNumLabel removes all numerical labels associated with the specified key for all +// samples in the profile. +func (p *Profile) RemoveNumLabel(key string) { + for _, sample := range p.Sample { + delete(sample.NumLabel, key) + delete(sample.NumUnit, key) + } +} + +// DiffBaseSample returns true if a sample belongs to the diff base and false +// otherwise. +func (s *Sample) DiffBaseSample() bool { + return s.HasLabel("pprof::base", "true") +} + +// Scale multiplies all sample values in a profile by a constant and keeps +// only samples that have at least one non-zero value. +func (p *Profile) Scale(ratio float64) { + if ratio == 1 { + return + } + ratios := make([]float64, len(p.SampleType)) + for i := range p.SampleType { + ratios[i] = ratio + } + p.ScaleN(ratios) +} + +// ScaleN multiplies each sample values in a sample by a different amount +// and keeps only samples that have at least one non-zero value. +func (p *Profile) ScaleN(ratios []float64) error { + if len(p.SampleType) != len(ratios) { + return fmt.Errorf("mismatched scale ratios, got %d, want %d", len(ratios), len(p.SampleType)) + } + allOnes := true + for _, r := range ratios { + if r != 1 { + allOnes = false + break + } + } + if allOnes { + return nil + } + fillIdx := 0 + for _, s := range p.Sample { + keepSample := false + for i, v := range s.Value { + if ratios[i] != 1 { + val := int64(math.Round(float64(v) * ratios[i])) + s.Value[i] = val + keepSample = keepSample || val != 0 + } + } + if keepSample { + p.Sample[fillIdx] = s + fillIdx++ + } + } + p.Sample = p.Sample[:fillIdx] + return nil +} + +// HasFunctions determines if all locations in this profile have +// symbolized function information. +func (p *Profile) HasFunctions() bool { + for _, l := range p.Location { + if l.Mapping != nil && !l.Mapping.HasFunctions { + return false + } + } + return true +} + +// HasFileLines determines if all locations in this profile have +// symbolized file and line number information. +func (p *Profile) HasFileLines() bool { + for _, l := range p.Location { + if l.Mapping != nil && (!l.Mapping.HasFilenames || !l.Mapping.HasLineNumbers) { + return false + } + } + return true +} + +// Unsymbolizable returns true if a mapping points to a binary for which +// locations can't be symbolized in principle, at least now. Examples are +// "[vdso]", "[vsyscall]" and some others, see the code. +func (m *Mapping) Unsymbolizable() bool { + name := filepath.Base(m.File) + return strings.HasPrefix(name, "[") || strings.HasPrefix(name, "linux-vdso") || strings.HasPrefix(m.File, "/dev/dri/") || m.File == "//anon" +} + +// Copy makes a fully independent copy of a profile. +func (p *Profile) Copy() *Profile { + pp := &Profile{} + if err := unmarshal(serialize(p), pp); err != nil { + panic(err) + } + if err := pp.postDecode(); err != nil { + panic(err) + } + + return pp +} diff --git a/backend/vendor/github.com/google/pprof/profile/proto.go b/backend/vendor/github.com/google/pprof/profile/proto.go new file mode 100644 index 0000000..a15696b --- /dev/null +++ b/backend/vendor/github.com/google/pprof/profile/proto.go @@ -0,0 +1,367 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// This file is a simple protocol buffer encoder and decoder. +// The format is described at +// https://developers.google.com/protocol-buffers/docs/encoding +// +// A protocol message must implement the message interface: +// decoder() []decoder +// encode(*buffer) +// +// The decode method returns a slice indexed by field number that gives the +// function to decode that field. +// The encode method encodes its receiver into the given buffer. +// +// The two methods are simple enough to be implemented by hand rather than +// by using a protocol compiler. +// +// See profile.go for examples of messages implementing this interface. +// +// There is no support for groups, message sets, or "has" bits. + +package profile + +import ( + "errors" + "fmt" +) + +type buffer struct { + field int // field tag + typ int // proto wire type code for field + u64 uint64 + data []byte + tmp [16]byte + tmpLines []Line // temporary storage used while decoding "repeated Line". +} + +type decoder func(*buffer, message) error + +type message interface { + decoder() []decoder + encode(*buffer) +} + +func marshal(m message) []byte { + var b buffer + m.encode(&b) + return b.data +} + +func encodeVarint(b *buffer, x uint64) { + for x >= 128 { + b.data = append(b.data, byte(x)|0x80) + x >>= 7 + } + b.data = append(b.data, byte(x)) +} + +func encodeLength(b *buffer, tag int, len int) { + encodeVarint(b, uint64(tag)<<3|2) + encodeVarint(b, uint64(len)) +} + +func encodeUint64(b *buffer, tag int, x uint64) { + // append varint to b.data + encodeVarint(b, uint64(tag)<<3) + encodeVarint(b, x) +} + +func encodeUint64s(b *buffer, tag int, x []uint64) { + if len(x) > 2 { + // Use packed encoding + n1 := len(b.data) + for _, u := range x { + encodeVarint(b, u) + } + n2 := len(b.data) + encodeLength(b, tag, n2-n1) + n3 := len(b.data) + copy(b.tmp[:], b.data[n2:n3]) + copy(b.data[n1+(n3-n2):], b.data[n1:n2]) + copy(b.data[n1:], b.tmp[:n3-n2]) + return + } + for _, u := range x { + encodeUint64(b, tag, u) + } +} + +func encodeUint64Opt(b *buffer, tag int, x uint64) { + if x == 0 { + return + } + encodeUint64(b, tag, x) +} + +func encodeInt64(b *buffer, tag int, x int64) { + u := uint64(x) + encodeUint64(b, tag, u) +} + +func encodeInt64s(b *buffer, tag int, x []int64) { + if len(x) > 2 { + // Use packed encoding + n1 := len(b.data) + for _, u := range x { + encodeVarint(b, uint64(u)) + } + n2 := len(b.data) + encodeLength(b, tag, n2-n1) + n3 := len(b.data) + copy(b.tmp[:], b.data[n2:n3]) + copy(b.data[n1+(n3-n2):], b.data[n1:n2]) + copy(b.data[n1:], b.tmp[:n3-n2]) + return + } + for _, u := range x { + encodeInt64(b, tag, u) + } +} + +func encodeInt64Opt(b *buffer, tag int, x int64) { + if x == 0 { + return + } + encodeInt64(b, tag, x) +} + +func encodeString(b *buffer, tag int, x string) { + encodeLength(b, tag, len(x)) + b.data = append(b.data, x...) +} + +func encodeStrings(b *buffer, tag int, x []string) { + for _, s := range x { + encodeString(b, tag, s) + } +} + +func encodeBool(b *buffer, tag int, x bool) { + if x { + encodeUint64(b, tag, 1) + } else { + encodeUint64(b, tag, 0) + } +} + +func encodeBoolOpt(b *buffer, tag int, x bool) { + if x { + encodeBool(b, tag, x) + } +} + +func encodeMessage(b *buffer, tag int, m message) { + n1 := len(b.data) + m.encode(b) + n2 := len(b.data) + encodeLength(b, tag, n2-n1) + n3 := len(b.data) + copy(b.tmp[:], b.data[n2:n3]) + copy(b.data[n1+(n3-n2):], b.data[n1:n2]) + copy(b.data[n1:], b.tmp[:n3-n2]) +} + +func unmarshal(data []byte, m message) (err error) { + b := buffer{data: data, typ: 2} + return decodeMessage(&b, m) +} + +func le64(p []byte) uint64 { + return uint64(p[0]) | uint64(p[1])<<8 | uint64(p[2])<<16 | uint64(p[3])<<24 | uint64(p[4])<<32 | uint64(p[5])<<40 | uint64(p[6])<<48 | uint64(p[7])<<56 +} + +func le32(p []byte) uint32 { + return uint32(p[0]) | uint32(p[1])<<8 | uint32(p[2])<<16 | uint32(p[3])<<24 +} + +func decodeVarint(data []byte) (uint64, []byte, error) { + var u uint64 + for i := 0; ; i++ { + if i >= 10 || i >= len(data) { + return 0, nil, errors.New("bad varint") + } + u |= uint64(data[i]&0x7F) << uint(7*i) + if data[i]&0x80 == 0 { + return u, data[i+1:], nil + } + } +} + +func decodeField(b *buffer, data []byte) ([]byte, error) { + x, data, err := decodeVarint(data) + if err != nil { + return nil, err + } + b.field = int(x >> 3) + b.typ = int(x & 7) + b.data = nil + b.u64 = 0 + switch b.typ { + case 0: + b.u64, data, err = decodeVarint(data) + if err != nil { + return nil, err + } + case 1: + if len(data) < 8 { + return nil, errors.New("not enough data") + } + b.u64 = le64(data[:8]) + data = data[8:] + case 2: + var n uint64 + n, data, err = decodeVarint(data) + if err != nil { + return nil, err + } + if n > uint64(len(data)) { + return nil, errors.New("too much data") + } + b.data = data[:n] + data = data[n:] + case 5: + if len(data) < 4 { + return nil, errors.New("not enough data") + } + b.u64 = uint64(le32(data[:4])) + data = data[4:] + default: + return nil, fmt.Errorf("unknown wire type: %d", b.typ) + } + + return data, nil +} + +func checkType(b *buffer, typ int) error { + if b.typ != typ { + return errors.New("type mismatch") + } + return nil +} + +func decodeMessage(b *buffer, m message) error { + if err := checkType(b, 2); err != nil { + return err + } + dec := m.decoder() + data := b.data + for len(data) > 0 { + // pull varint field# + type + var err error + data, err = decodeField(b, data) + if err != nil { + return err + } + if b.field >= len(dec) || dec[b.field] == nil { + continue + } + if err := dec[b.field](b, m); err != nil { + return err + } + } + return nil +} + +func decodeInt64(b *buffer, x *int64) error { + if err := checkType(b, 0); err != nil { + return err + } + *x = int64(b.u64) + return nil +} + +func decodeInt64s(b *buffer, x *[]int64) error { + if b.typ == 2 { + // Packed encoding + data := b.data + for len(data) > 0 { + var u uint64 + var err error + + if u, data, err = decodeVarint(data); err != nil { + return err + } + *x = append(*x, int64(u)) + } + return nil + } + var i int64 + if err := decodeInt64(b, &i); err != nil { + return err + } + *x = append(*x, i) + return nil +} + +func decodeUint64(b *buffer, x *uint64) error { + if err := checkType(b, 0); err != nil { + return err + } + *x = b.u64 + return nil +} + +func decodeUint64s(b *buffer, x *[]uint64) error { + if b.typ == 2 { + data := b.data + // Packed encoding + for len(data) > 0 { + var u uint64 + var err error + + if u, data, err = decodeVarint(data); err != nil { + return err + } + *x = append(*x, u) + } + return nil + } + var u uint64 + if err := decodeUint64(b, &u); err != nil { + return err + } + *x = append(*x, u) + return nil +} + +func decodeString(b *buffer, x *string) error { + if err := checkType(b, 2); err != nil { + return err + } + *x = string(b.data) + return nil +} + +func decodeStrings(b *buffer, x *[]string) error { + var s string + if err := decodeString(b, &s); err != nil { + return err + } + *x = append(*x, s) + return nil +} + +func decodeBool(b *buffer, x *bool) error { + if err := checkType(b, 0); err != nil { + return err + } + if int64(b.u64) == 0 { + *x = false + } else { + *x = true + } + return nil +} diff --git a/backend/vendor/github.com/google/pprof/profile/prune.go b/backend/vendor/github.com/google/pprof/profile/prune.go new file mode 100644 index 0000000..b2f9fd5 --- /dev/null +++ b/backend/vendor/github.com/google/pprof/profile/prune.go @@ -0,0 +1,194 @@ +// Copyright 2014 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Implements methods to remove frames from profiles. + +package profile + +import ( + "fmt" + "regexp" + "strings" +) + +var ( + reservedNames = []string{"(anonymous namespace)", "operator()"} + bracketRx = func() *regexp.Regexp { + var quotedNames []string + for _, name := range append(reservedNames, "(") { + quotedNames = append(quotedNames, regexp.QuoteMeta(name)) + } + return regexp.MustCompile(strings.Join(quotedNames, "|")) + }() +) + +// simplifyFunc does some primitive simplification of function names. +func simplifyFunc(f string) string { + // Account for leading '.' on the PPC ELF v1 ABI. + funcName := strings.TrimPrefix(f, ".") + // Account for unsimplified names -- try to remove the argument list by trimming + // starting from the first '(', but skipping reserved names that have '('. + for _, ind := range bracketRx.FindAllStringSubmatchIndex(funcName, -1) { + foundReserved := false + for _, res := range reservedNames { + if funcName[ind[0]:ind[1]] == res { + foundReserved = true + break + } + } + if !foundReserved { + funcName = funcName[:ind[0]] + break + } + } + return funcName +} + +// Prune removes all nodes beneath a node matching dropRx, and not +// matching keepRx. If the root node of a Sample matches, the sample +// will have an empty stack. +func (p *Profile) Prune(dropRx, keepRx *regexp.Regexp) { + prune := make(map[uint64]bool) + pruneBeneath := make(map[uint64]bool) + + // simplifyFunc can be expensive, so cache results. + // Note that the same function name can be encountered many times due + // different lines and addresses in the same function. + pruneCache := map[string]bool{} // Map from function to whether or not to prune + pruneFromHere := func(s string) bool { + if r, ok := pruneCache[s]; ok { + return r + } + funcName := simplifyFunc(s) + if dropRx.MatchString(funcName) { + if keepRx == nil || !keepRx.MatchString(funcName) { + pruneCache[s] = true + return true + } + } + pruneCache[s] = false + return false + } + + for _, loc := range p.Location { + var i int + for i = len(loc.Line) - 1; i >= 0; i-- { + if fn := loc.Line[i].Function; fn != nil && fn.Name != "" { + if pruneFromHere(fn.Name) { + break + } + } + } + + if i >= 0 { + // Found matching entry to prune. + pruneBeneath[loc.ID] = true + + // Remove the matching location. + if i == len(loc.Line)-1 { + // Matched the top entry: prune the whole location. + prune[loc.ID] = true + } else { + loc.Line = loc.Line[i+1:] + } + } + } + + // Prune locs from each Sample + for _, sample := range p.Sample { + // Scan from the root to the leaves to find the prune location. + // Do not prune frames before the first user frame, to avoid + // pruning everything. + foundUser := false + for i := len(sample.Location) - 1; i >= 0; i-- { + id := sample.Location[i].ID + if !prune[id] && !pruneBeneath[id] { + foundUser = true + continue + } + if !foundUser { + continue + } + if prune[id] { + sample.Location = sample.Location[i+1:] + break + } + if pruneBeneath[id] { + sample.Location = sample.Location[i:] + break + } + } + } +} + +// RemoveUninteresting prunes and elides profiles using built-in +// tables of uninteresting function names. +func (p *Profile) RemoveUninteresting() error { + var keep, drop *regexp.Regexp + var err error + + if p.DropFrames != "" { + if drop, err = regexp.Compile("^(" + p.DropFrames + ")$"); err != nil { + return fmt.Errorf("failed to compile regexp %s: %v", p.DropFrames, err) + } + if p.KeepFrames != "" { + if keep, err = regexp.Compile("^(" + p.KeepFrames + ")$"); err != nil { + return fmt.Errorf("failed to compile regexp %s: %v", p.KeepFrames, err) + } + } + p.Prune(drop, keep) + } + return nil +} + +// PruneFrom removes all nodes beneath the lowest node matching dropRx, not including itself. +// +// Please see the example below to understand this method as well as +// the difference from Prune method. +// +// A sample contains Location of [A,B,C,B,D] where D is the top frame and there's no inline. +// +// PruneFrom(A) returns [A,B,C,B,D] because there's no node beneath A. +// Prune(A, nil) returns [B,C,B,D] by removing A itself. +// +// PruneFrom(B) returns [B,C,B,D] by removing all nodes beneath the first B when scanning from the bottom. +// Prune(B, nil) returns [D] because a matching node is found by scanning from the root. +func (p *Profile) PruneFrom(dropRx *regexp.Regexp) { + pruneBeneath := make(map[uint64]bool) + + for _, loc := range p.Location { + for i := 0; i < len(loc.Line); i++ { + if fn := loc.Line[i].Function; fn != nil && fn.Name != "" { + funcName := simplifyFunc(fn.Name) + if dropRx.MatchString(funcName) { + // Found matching entry to prune. + pruneBeneath[loc.ID] = true + loc.Line = loc.Line[i:] + break + } + } + } + } + + // Prune locs from each Sample + for _, sample := range p.Sample { + // Scan from the bottom leaf to the root to find the prune location. + for i, loc := range sample.Location { + if pruneBeneath[loc.ID] { + sample.Location = sample.Location[i:] + break + } + } + } +} diff --git a/backend/vendor/github.com/google/uuid/CHANGELOG.md b/backend/vendor/github.com/google/uuid/CHANGELOG.md new file mode 100644 index 0000000..2bd7866 --- /dev/null +++ b/backend/vendor/github.com/google/uuid/CHANGELOG.md @@ -0,0 +1,10 @@ +# Changelog + +## [1.3.1](https://github.com/google/uuid/compare/v1.3.0...v1.3.1) (2023-08-18) + + +### Bug Fixes + +* Use .EqualFold() to parse urn prefixed UUIDs ([#118](https://github.com/google/uuid/issues/118)) ([574e687](https://github.com/google/uuid/commit/574e6874943741fb99d41764c705173ada5293f0)) + +## Changelog diff --git a/backend/vendor/github.com/klauspost/compress/.gitattributes b/backend/vendor/github.com/klauspost/compress/.gitattributes new file mode 100644 index 0000000..4024335 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/.gitattributes @@ -0,0 +1,2 @@ +* -text +*.bin -text -diff diff --git a/backend/vendor/github.com/klauspost/compress/.gitignore b/backend/vendor/github.com/klauspost/compress/.gitignore new file mode 100644 index 0000000..d31b378 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/.gitignore @@ -0,0 +1,32 @@ +# Compiled Object files, Static and Dynamic libs (Shared Objects) +*.o +*.a +*.so + +# Folders +_obj +_test + +# Architecture specific extensions/prefixes +*.[568vq] +[568vq].out + +*.cgo1.go +*.cgo2.c +_cgo_defun.c +_cgo_gotypes.go +_cgo_export.* + +_testmain.go + +*.exe +*.test +*.prof +/s2/cmd/_s2sx/sfx-exe + +# Linux perf files +perf.data +perf.data.old + +# gdb history +.gdb_history diff --git a/backend/vendor/github.com/klauspost/compress/.goreleaser.yml b/backend/vendor/github.com/klauspost/compress/.goreleaser.yml new file mode 100644 index 0000000..4528059 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/.goreleaser.yml @@ -0,0 +1,123 @@ +version: 2 + +before: + hooks: + - ./gen.sh + +builds: + - + id: "s2c" + binary: s2c + main: ./s2/cmd/s2c/main.go + flags: + - -trimpath + env: + - CGO_ENABLED=0 + goos: + - aix + - linux + - freebsd + - netbsd + - windows + - darwin + goarch: + - 386 + - amd64 + - arm + - arm64 + - ppc64 + - ppc64le + - mips64 + - mips64le + goarm: + - 7 + - + id: "s2d" + binary: s2d + main: ./s2/cmd/s2d/main.go + flags: + - -trimpath + env: + - CGO_ENABLED=0 + goos: + - aix + - linux + - freebsd + - netbsd + - windows + - darwin + goarch: + - 386 + - amd64 + - arm + - arm64 + - ppc64 + - ppc64le + - mips64 + - mips64le + goarm: + - 7 + - + id: "s2sx" + binary: s2sx + main: ./s2/cmd/_s2sx/main.go + flags: + - -modfile=s2sx.mod + - -trimpath + env: + - CGO_ENABLED=0 + goos: + - aix + - linux + - freebsd + - netbsd + - windows + - darwin + goarch: + - 386 + - amd64 + - arm + - arm64 + - ppc64 + - ppc64le + - mips64 + - mips64le + goarm: + - 7 + +archives: + - + id: s2-binaries + name_template: "s2-{{ .Os }}_{{ .Arch }}{{ if .Arm }}v{{ .Arm }}{{ end }}" + format_overrides: + - goos: windows + format: zip + files: + - unpack/* + - s2/LICENSE + - s2/README.md +checksum: + name_template: 'checksums.txt' +snapshot: + version_template: "{{ .Tag }}-next" +changelog: + sort: asc + filters: + exclude: + - '^doc:' + - '^docs:' + - '^test:' + - '^tests:' + - '^Update\sREADME.md' + +nfpms: + - + file_name_template: "s2_package__{{ .Os }}_{{ .Arch }}{{ if .Arm }}v{{ .Arm }}{{ end }}" + vendor: Klaus Post + homepage: https://github.com/klauspost/compress + maintainer: Klaus Post + description: S2 Compression Tool + license: BSD 3-Clause + formats: + - deb + - rpm diff --git a/backend/vendor/github.com/klauspost/compress/LICENSE b/backend/vendor/github.com/klauspost/compress/LICENSE new file mode 100644 index 0000000..87d5574 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/LICENSE @@ -0,0 +1,304 @@ +Copyright (c) 2012 The Go Authors. All rights reserved. +Copyright (c) 2019 Klaus Post. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +------------------ + +Files: gzhttp/* + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. 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IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. + +--------------------- +Files: snappy/* +Files: internal/snapref/* + +Copyright (c) 2011 The Snappy-Go Authors. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +----------------- + +Files: s2/cmd/internal/filepathx/* + +Copyright 2016 The filepathx Authors + +Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/backend/vendor/github.com/klauspost/compress/README.md b/backend/vendor/github.com/klauspost/compress/README.md new file mode 100644 index 0000000..244ee19 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/README.md @@ -0,0 +1,671 @@ +# compress + +This package provides various compression algorithms. + +* [zstandard](https://github.com/klauspost/compress/tree/master/zstd#zstd) compression and decompression in pure Go. +* [S2](https://github.com/klauspost/compress/tree/master/s2#s2-compression) is a high performance replacement for Snappy. +* Optimized [deflate](https://godoc.org/github.com/klauspost/compress/flate) packages which can be used as a dropin replacement for [gzip](https://godoc.org/github.com/klauspost/compress/gzip), [zip](https://godoc.org/github.com/klauspost/compress/zip) and [zlib](https://godoc.org/github.com/klauspost/compress/zlib). +* [snappy](https://github.com/klauspost/compress/tree/master/snappy) is a drop-in replacement for `github.com/golang/snappy` offering better compression and concurrent streams. +* [huff0](https://github.com/klauspost/compress/tree/master/huff0) and [FSE](https://github.com/klauspost/compress/tree/master/fse) implementations for raw entropy encoding. +* [gzhttp](https://github.com/klauspost/compress/tree/master/gzhttp) Provides client and server wrappers for handling gzipped requests efficiently. +* [pgzip](https://github.com/klauspost/pgzip) is a separate package that provides a very fast parallel gzip implementation. + +[![Go Reference](https://pkg.go.dev/badge/klauspost/compress.svg)](https://pkg.go.dev/github.com/klauspost/compress?tab=subdirectories) +[![Go](https://github.com/klauspost/compress/actions/workflows/go.yml/badge.svg)](https://github.com/klauspost/compress/actions/workflows/go.yml) +[![Sourcegraph Badge](https://sourcegraph.com/github.com/klauspost/compress/-/badge.svg)](https://sourcegraph.com/github.com/klauspost/compress?badge) + +# package usage + +Use `go get github.com/klauspost/compress@latest` to add it to your project. + +This package will support the current Go version and 2 versions back. + +* Use the `nounsafe` tag to disable all use of the "unsafe" package. +* Use the `noasm` tag to disable all assembly across packages. + +Use the links above for more information on each. + +# changelog + +* Feb 19th, 2025 - [1.18.0](https://github.com/klauspost/compress/releases/tag/v1.18.0) + * Add unsafe little endian loaders https://github.com/klauspost/compress/pull/1036 + * fix: check `r.err != nil` but return a nil value error `err` by @alingse in https://github.com/klauspost/compress/pull/1028 + * flate: Simplify L4-6 loading https://github.com/klauspost/compress/pull/1043 + * flate: Simplify matchlen (remove asm) https://github.com/klauspost/compress/pull/1045 + * s2: Improve small block compression speed w/o asm https://github.com/klauspost/compress/pull/1048 + * flate: Fix matchlen L5+L6 https://github.com/klauspost/compress/pull/1049 + * flate: Cleanup & reduce casts https://github.com/klauspost/compress/pull/1050 + +* Oct 11th, 2024 - [1.17.11](https://github.com/klauspost/compress/releases/tag/v1.17.11) + * zstd: Fix extra CRC written with multiple Close calls https://github.com/klauspost/compress/pull/1017 + * s2: Don't use stack for index tables https://github.com/klauspost/compress/pull/1014 + * gzhttp: No content-type on no body response code by @juliens in https://github.com/klauspost/compress/pull/1011 + * gzhttp: Do not set the content-type when response has no body by @kevinpollet in https://github.com/klauspost/compress/pull/1013 + +* Sep 23rd, 2024 - [1.17.10](https://github.com/klauspost/compress/releases/tag/v1.17.10) + * gzhttp: Add TransportAlwaysDecompress option. https://github.com/klauspost/compress/pull/978 + * gzhttp: Add supported decompress request body by @mirecl in https://github.com/klauspost/compress/pull/1002 + * s2: Add EncodeBuffer buffer recycling callback https://github.com/klauspost/compress/pull/982 + * zstd: Improve memory usage on small streaming encodes https://github.com/klauspost/compress/pull/1007 + * flate: read data written with partial flush by @vajexal in https://github.com/klauspost/compress/pull/996 + +* Jun 12th, 2024 - [1.17.9](https://github.com/klauspost/compress/releases/tag/v1.17.9) + * s2: Reduce ReadFrom temporary allocations https://github.com/klauspost/compress/pull/949 + * flate, zstd: Shave some bytes off amd64 matchLen by @greatroar in https://github.com/klauspost/compress/pull/963 + * Upgrade zip/zlib to 1.22.4 upstream https://github.com/klauspost/compress/pull/970 https://github.com/klauspost/compress/pull/971 + * zstd: BuildDict fails with RLE table https://github.com/klauspost/compress/pull/951 + +* Apr 9th, 2024 - [1.17.8](https://github.com/klauspost/compress/releases/tag/v1.17.8) + * zstd: Reject blocks where reserved values are not 0 https://github.com/klauspost/compress/pull/885 + * zstd: Add RLE detection+encoding https://github.com/klauspost/compress/pull/938 + +* Feb 21st, 2024 - [1.17.7](https://github.com/klauspost/compress/releases/tag/v1.17.7) + * s2: Add AsyncFlush method: Complete the block without flushing by @Jille in https://github.com/klauspost/compress/pull/927 + * s2: Fix literal+repeat exceeds dst crash https://github.com/klauspost/compress/pull/930 + +* Feb 5th, 2024 - [1.17.6](https://github.com/klauspost/compress/releases/tag/v1.17.6) + * zstd: Fix incorrect repeat coding in best mode https://github.com/klauspost/compress/pull/923 + * s2: Fix DecodeConcurrent deadlock on errors https://github.com/klauspost/compress/pull/925 + +* Jan 26th, 2024 - [v1.17.5](https://github.com/klauspost/compress/releases/tag/v1.17.5) + * flate: Fix reset with dictionary on custom window encodes https://github.com/klauspost/compress/pull/912 + * zstd: Add Frame header encoding and stripping https://github.com/klauspost/compress/pull/908 + * zstd: Limit better/best default window to 8MB https://github.com/klauspost/compress/pull/913 + * zstd: Speed improvements by @greatroar in https://github.com/klauspost/compress/pull/896 https://github.com/klauspost/compress/pull/910 + * s2: Fix callbacks for skippable blocks and disallow 0xfe (Padding) by @Jille in https://github.com/klauspost/compress/pull/916 https://github.com/klauspost/compress/pull/917 +https://github.com/klauspost/compress/pull/919 https://github.com/klauspost/compress/pull/918 + +* Dec 1st, 2023 - [v1.17.4](https://github.com/klauspost/compress/releases/tag/v1.17.4) + * huff0: Speed up symbol counting by @greatroar in https://github.com/klauspost/compress/pull/887 + * huff0: Remove byteReader by @greatroar in https://github.com/klauspost/compress/pull/886 + * gzhttp: Allow overriding decompression on transport https://github.com/klauspost/compress/pull/892 + * gzhttp: Clamp compression level https://github.com/klauspost/compress/pull/890 + * gzip: Error out if reserved bits are set https://github.com/klauspost/compress/pull/891 + +* Nov 15th, 2023 - [v1.17.3](https://github.com/klauspost/compress/releases/tag/v1.17.3) + * fse: Fix max header size https://github.com/klauspost/compress/pull/881 + * zstd: Improve better/best compression https://github.com/klauspost/compress/pull/877 + * gzhttp: Fix missing content type on Close https://github.com/klauspost/compress/pull/883 + +* Oct 22nd, 2023 - [v1.17.2](https://github.com/klauspost/compress/releases/tag/v1.17.2) + * zstd: Fix rare *CORRUPTION* output in "best" mode. See https://github.com/klauspost/compress/pull/876 + +* Oct 14th, 2023 - [v1.17.1](https://github.com/klauspost/compress/releases/tag/v1.17.1) + * s2: Fix S2 "best" dictionary wrong encoding https://github.com/klauspost/compress/pull/871 + * flate: Reduce allocations in decompressor and minor code improvements by @fakefloordiv in https://github.com/klauspost/compress/pull/869 + * s2: Fix EstimateBlockSize on 6&7 length input https://github.com/klauspost/compress/pull/867 + +* Sept 19th, 2023 - [v1.17.0](https://github.com/klauspost/compress/releases/tag/v1.17.0) + * Add experimental dictionary builder https://github.com/klauspost/compress/pull/853 + * Add xerial snappy read/writer https://github.com/klauspost/compress/pull/838 + * flate: Add limited window compression https://github.com/klauspost/compress/pull/843 + * s2: Do 2 overlapping match checks https://github.com/klauspost/compress/pull/839 + * flate: Add amd64 assembly matchlen https://github.com/klauspost/compress/pull/837 + * gzip: Copy bufio.Reader on Reset by @thatguystone in https://github.com/klauspost/compress/pull/860 + +
+ See changes to v1.16.x + + +* July 1st, 2023 - [v1.16.7](https://github.com/klauspost/compress/releases/tag/v1.16.7) + * zstd: Fix default level first dictionary encode https://github.com/klauspost/compress/pull/829 + * s2: add GetBufferCapacity() method by @GiedriusS in https://github.com/klauspost/compress/pull/832 + +* June 13, 2023 - [v1.16.6](https://github.com/klauspost/compress/releases/tag/v1.16.6) + * zstd: correctly ignore WithEncoderPadding(1) by @ianlancetaylor in https://github.com/klauspost/compress/pull/806 + * zstd: Add amd64 match length assembly https://github.com/klauspost/compress/pull/824 + * gzhttp: Handle informational headers by @rtribotte in https://github.com/klauspost/compress/pull/815 + * s2: Improve Better compression slightly https://github.com/klauspost/compress/pull/663 + +* Apr 16, 2023 - [v1.16.5](https://github.com/klauspost/compress/releases/tag/v1.16.5) + * zstd: readByte needs to use io.ReadFull by @jnoxon in https://github.com/klauspost/compress/pull/802 + * gzip: Fix WriterTo after initial read https://github.com/klauspost/compress/pull/804 + +* Apr 5, 2023 - [v1.16.4](https://github.com/klauspost/compress/releases/tag/v1.16.4) + * zstd: Improve zstd best efficiency by @greatroar and @klauspost in https://github.com/klauspost/compress/pull/784 + * zstd: Respect WithAllLitEntropyCompression https://github.com/klauspost/compress/pull/792 + * zstd: Fix amd64 not always detecting corrupt data https://github.com/klauspost/compress/pull/785 + * zstd: Various minor improvements by @greatroar in https://github.com/klauspost/compress/pull/788 https://github.com/klauspost/compress/pull/794 https://github.com/klauspost/compress/pull/795 + * s2: Fix huge block overflow https://github.com/klauspost/compress/pull/779 + * s2: Allow CustomEncoder fallback https://github.com/klauspost/compress/pull/780 + * gzhttp: Support ResponseWriter Unwrap() in gzhttp handler by @jgimenez in https://github.com/klauspost/compress/pull/799 + +* Mar 13, 2023 - [v1.16.1](https://github.com/klauspost/compress/releases/tag/v1.16.1) + * zstd: Speed up + improve best encoder by @greatroar in https://github.com/klauspost/compress/pull/776 + * gzhttp: Add optional [BREACH mitigation](https://github.com/klauspost/compress/tree/master/gzhttp#breach-mitigation). https://github.com/klauspost/compress/pull/762 https://github.com/klauspost/compress/pull/768 https://github.com/klauspost/compress/pull/769 https://github.com/klauspost/compress/pull/770 https://github.com/klauspost/compress/pull/767 + * s2: Add Intel LZ4s converter https://github.com/klauspost/compress/pull/766 + * zstd: Minor bug fixes https://github.com/klauspost/compress/pull/771 https://github.com/klauspost/compress/pull/772 https://github.com/klauspost/compress/pull/773 + * huff0: Speed up compress1xDo by @greatroar in https://github.com/klauspost/compress/pull/774 + +* Feb 26, 2023 - [v1.16.0](https://github.com/klauspost/compress/releases/tag/v1.16.0) + * s2: Add [Dictionary](https://github.com/klauspost/compress/tree/master/s2#dictionaries) support. https://github.com/klauspost/compress/pull/685 + * s2: Add Compression Size Estimate. https://github.com/klauspost/compress/pull/752 + * s2: Add support for custom stream encoder. https://github.com/klauspost/compress/pull/755 + * s2: Add LZ4 block converter. https://github.com/klauspost/compress/pull/748 + * s2: Support io.ReaderAt in ReadSeeker. https://github.com/klauspost/compress/pull/747 + * s2c/s2sx: Use concurrent decoding. https://github.com/klauspost/compress/pull/746 +
+ +
+ See changes to v1.15.x + +* Jan 21st, 2023 (v1.15.15) + * deflate: Improve level 7-9 https://github.com/klauspost/compress/pull/739 + * zstd: Add delta encoding support by @greatroar in https://github.com/klauspost/compress/pull/728 + * zstd: Various speed improvements by @greatroar https://github.com/klauspost/compress/pull/741 https://github.com/klauspost/compress/pull/734 https://github.com/klauspost/compress/pull/736 https://github.com/klauspost/compress/pull/744 https://github.com/klauspost/compress/pull/743 https://github.com/klauspost/compress/pull/745 + * gzhttp: Add SuffixETag() and DropETag() options to prevent ETag collisions on compressed responses by @willbicks in https://github.com/klauspost/compress/pull/740 + +* Jan 3rd, 2023 (v1.15.14) + + * flate: Improve speed in big stateless blocks https://github.com/klauspost/compress/pull/718 + * zstd: Minor speed tweaks by @greatroar in https://github.com/klauspost/compress/pull/716 https://github.com/klauspost/compress/pull/720 + * export NoGzipResponseWriter for custom ResponseWriter wrappers by @harshavardhana in https://github.com/klauspost/compress/pull/722 + * s2: Add example for indexing and existing stream https://github.com/klauspost/compress/pull/723 + +* Dec 11, 2022 (v1.15.13) + * zstd: Add [MaxEncodedSize](https://pkg.go.dev/github.com/klauspost/compress@v1.15.13/zstd#Encoder.MaxEncodedSize) to encoder https://github.com/klauspost/compress/pull/691 + * zstd: Various tweaks and improvements https://github.com/klauspost/compress/pull/693 https://github.com/klauspost/compress/pull/695 https://github.com/klauspost/compress/pull/696 https://github.com/klauspost/compress/pull/701 https://github.com/klauspost/compress/pull/702 https://github.com/klauspost/compress/pull/703 https://github.com/klauspost/compress/pull/704 https://github.com/klauspost/compress/pull/705 https://github.com/klauspost/compress/pull/706 https://github.com/klauspost/compress/pull/707 https://github.com/klauspost/compress/pull/708 + +* Oct 26, 2022 (v1.15.12) + + * zstd: Tweak decoder allocs. https://github.com/klauspost/compress/pull/680 + * gzhttp: Always delete `HeaderNoCompression` https://github.com/klauspost/compress/pull/683 + +* Sept 26, 2022 (v1.15.11) + + * flate: Improve level 1-3 compression https://github.com/klauspost/compress/pull/678 + * zstd: Improve "best" compression by @nightwolfz in https://github.com/klauspost/compress/pull/677 + * zstd: Fix+reduce decompression allocations https://github.com/klauspost/compress/pull/668 + * zstd: Fix non-effective noescape tag https://github.com/klauspost/compress/pull/667 + +* Sept 16, 2022 (v1.15.10) + + * zstd: Add [WithDecodeAllCapLimit](https://pkg.go.dev/github.com/klauspost/compress@v1.15.10/zstd#WithDecodeAllCapLimit) https://github.com/klauspost/compress/pull/649 + * Add Go 1.19 - deprecate Go 1.16 https://github.com/klauspost/compress/pull/651 + * flate: Improve level 5+6 compression https://github.com/klauspost/compress/pull/656 + * zstd: Improve "better" compression https://github.com/klauspost/compress/pull/657 + * s2: Improve "best" compression https://github.com/klauspost/compress/pull/658 + * s2: Improve "better" compression. https://github.com/klauspost/compress/pull/635 + * s2: Slightly faster non-assembly decompression https://github.com/klauspost/compress/pull/646 + * Use arrays for constant size copies https://github.com/klauspost/compress/pull/659 + +* July 21, 2022 (v1.15.9) + + * zstd: Fix decoder crash on amd64 (no BMI) on invalid input https://github.com/klauspost/compress/pull/645 + * zstd: Disable decoder extended memory copies (amd64) due to possible crashes https://github.com/klauspost/compress/pull/644 + * zstd: Allow single segments up to "max decoded size" https://github.com/klauspost/compress/pull/643 + +* July 13, 2022 (v1.15.8) + + * gzip: fix stack exhaustion bug in Reader.Read https://github.com/klauspost/compress/pull/641 + * s2: Add Index header trim/restore https://github.com/klauspost/compress/pull/638 + * zstd: Optimize seqdeq amd64 asm by @greatroar in https://github.com/klauspost/compress/pull/636 + * zstd: Improve decoder memcopy https://github.com/klauspost/compress/pull/637 + * huff0: Pass a single bitReader pointer to asm by @greatroar in https://github.com/klauspost/compress/pull/634 + * zstd: Branchless getBits for amd64 w/o BMI2 by @greatroar in https://github.com/klauspost/compress/pull/640 + * gzhttp: Remove header before writing https://github.com/klauspost/compress/pull/639 + +* June 29, 2022 (v1.15.7) + + * s2: Fix absolute forward seeks https://github.com/klauspost/compress/pull/633 + * zip: Merge upstream https://github.com/klauspost/compress/pull/631 + * zip: Re-add zip64 fix https://github.com/klauspost/compress/pull/624 + * zstd: translate fseDecoder.buildDtable into asm by @WojciechMula in https://github.com/klauspost/compress/pull/598 + * flate: Faster histograms https://github.com/klauspost/compress/pull/620 + * deflate: Use compound hcode https://github.com/klauspost/compress/pull/622 + +* June 3, 2022 (v1.15.6) + * s2: Improve coding for long, close matches https://github.com/klauspost/compress/pull/613 + * s2c: Add Snappy/S2 stream recompression https://github.com/klauspost/compress/pull/611 + * zstd: Always use configured block size https://github.com/klauspost/compress/pull/605 + * zstd: Fix incorrect hash table placement for dict encoding in default https://github.com/klauspost/compress/pull/606 + * zstd: Apply default config to ZipDecompressor without options https://github.com/klauspost/compress/pull/608 + * gzhttp: Exclude more common archive formats https://github.com/klauspost/compress/pull/612 + * s2: Add ReaderIgnoreCRC https://github.com/klauspost/compress/pull/609 + * s2: Remove sanity load on index creation https://github.com/klauspost/compress/pull/607 + * snappy: Use dedicated function for scoring https://github.com/klauspost/compress/pull/614 + * s2c+s2d: Use official snappy framed extension https://github.com/klauspost/compress/pull/610 + +* May 25, 2022 (v1.15.5) + * s2: Add concurrent stream decompression https://github.com/klauspost/compress/pull/602 + * s2: Fix final emit oob read crash on amd64 https://github.com/klauspost/compress/pull/601 + * huff0: asm implementation of Decompress1X by @WojciechMula https://github.com/klauspost/compress/pull/596 + * zstd: Use 1 less goroutine for stream decoding https://github.com/klauspost/compress/pull/588 + * zstd: Copy literal in 16 byte blocks when possible https://github.com/klauspost/compress/pull/592 + * zstd: Speed up when WithDecoderLowmem(false) https://github.com/klauspost/compress/pull/599 + * zstd: faster next state update in BMI2 version of decode by @WojciechMula in https://github.com/klauspost/compress/pull/593 + * huff0: Do not check max size when reading table. https://github.com/klauspost/compress/pull/586 + * flate: Inplace hashing for level 7-9 https://github.com/klauspost/compress/pull/590 + + +* May 11, 2022 (v1.15.4) + * huff0: decompress directly into output by @WojciechMula in [#577](https://github.com/klauspost/compress/pull/577) + * inflate: Keep dict on stack [#581](https://github.com/klauspost/compress/pull/581) + * zstd: Faster decoding memcopy in asm [#583](https://github.com/klauspost/compress/pull/583) + * zstd: Fix ignored crc [#580](https://github.com/klauspost/compress/pull/580) + +* May 5, 2022 (v1.15.3) + * zstd: Allow to ignore checksum checking by @WojciechMula [#572](https://github.com/klauspost/compress/pull/572) + * s2: Fix incorrect seek for io.SeekEnd in [#575](https://github.com/klauspost/compress/pull/575) + +* Apr 26, 2022 (v1.15.2) + * zstd: Add x86-64 assembly for decompression on streams and blocks. Contributed by [@WojciechMula](https://github.com/WojciechMula). Typically 2x faster. [#528](https://github.com/klauspost/compress/pull/528) [#531](https://github.com/klauspost/compress/pull/531) [#545](https://github.com/klauspost/compress/pull/545) [#537](https://github.com/klauspost/compress/pull/537) + * zstd: Add options to ZipDecompressor and fixes [#539](https://github.com/klauspost/compress/pull/539) + * s2: Use sorted search for index [#555](https://github.com/klauspost/compress/pull/555) + * Minimum version is Go 1.16, added CI test on 1.18. + +* Mar 11, 2022 (v1.15.1) + * huff0: Add x86 assembly of Decode4X by @WojciechMula in [#512](https://github.com/klauspost/compress/pull/512) + * zstd: Reuse zip decoders in [#514](https://github.com/klauspost/compress/pull/514) + * zstd: Detect extra block data and report as corrupted in [#520](https://github.com/klauspost/compress/pull/520) + * zstd: Handle zero sized frame content size stricter in [#521](https://github.com/klauspost/compress/pull/521) + * zstd: Add stricter block size checks in [#523](https://github.com/klauspost/compress/pull/523) + +* Mar 3, 2022 (v1.15.0) + * zstd: Refactor decoder [#498](https://github.com/klauspost/compress/pull/498) + * zstd: Add stream encoding without goroutines [#505](https://github.com/klauspost/compress/pull/505) + * huff0: Prevent single blocks exceeding 16 bits by @klauspost in[#507](https://github.com/klauspost/compress/pull/507) + * flate: Inline literal emission [#509](https://github.com/klauspost/compress/pull/509) + * gzhttp: Add zstd to transport [#400](https://github.com/klauspost/compress/pull/400) + * gzhttp: Make content-type optional [#510](https://github.com/klauspost/compress/pull/510) + +Both compression and decompression now supports "synchronous" stream operations. This means that whenever "concurrency" is set to 1, they will operate without spawning goroutines. + +Stream decompression is now faster on asynchronous, since the goroutine allocation much more effectively splits the workload. On typical streams this will typically use 2 cores fully for decompression. When a stream has finished decoding no goroutines will be left over, so decoders can now safely be pooled and still be garbage collected. + +While the release has been extensively tested, it is recommended to testing when upgrading. + +
+ +
+ See changes to v1.14.x + +* Feb 22, 2022 (v1.14.4) + * flate: Fix rare huffman only (-2) corruption. [#503](https://github.com/klauspost/compress/pull/503) + * zip: Update deprecated CreateHeaderRaw to correctly call CreateRaw by @saracen in [#502](https://github.com/klauspost/compress/pull/502) + * zip: don't read data descriptor early by @saracen in [#501](https://github.com/klauspost/compress/pull/501) #501 + * huff0: Use static decompression buffer up to 30% faster [#499](https://github.com/klauspost/compress/pull/499) [#500](https://github.com/klauspost/compress/pull/500) + +* Feb 17, 2022 (v1.14.3) + * flate: Improve fastest levels compression speed ~10% more throughput. [#482](https://github.com/klauspost/compress/pull/482) [#489](https://github.com/klauspost/compress/pull/489) [#490](https://github.com/klauspost/compress/pull/490) [#491](https://github.com/klauspost/compress/pull/491) [#494](https://github.com/klauspost/compress/pull/494) [#478](https://github.com/klauspost/compress/pull/478) + * flate: Faster decompression speed, ~5-10%. [#483](https://github.com/klauspost/compress/pull/483) + * s2: Faster compression with Go v1.18 and amd64 microarch level 3+. [#484](https://github.com/klauspost/compress/pull/484) [#486](https://github.com/klauspost/compress/pull/486) + +* Jan 25, 2022 (v1.14.2) + * zstd: improve header decoder by @dsnet [#476](https://github.com/klauspost/compress/pull/476) + * zstd: Add bigger default blocks [#469](https://github.com/klauspost/compress/pull/469) + * zstd: Remove unused decompression buffer [#470](https://github.com/klauspost/compress/pull/470) + * zstd: Fix logically dead code by @ningmingxiao [#472](https://github.com/klauspost/compress/pull/472) + * flate: Improve level 7-9 [#471](https://github.com/klauspost/compress/pull/471) [#473](https://github.com/klauspost/compress/pull/473) + * zstd: Add noasm tag for xxhash [#475](https://github.com/klauspost/compress/pull/475) + +* Jan 11, 2022 (v1.14.1) + * s2: Add stream index in [#462](https://github.com/klauspost/compress/pull/462) + * flate: Speed and efficiency improvements in [#439](https://github.com/klauspost/compress/pull/439) [#461](https://github.com/klauspost/compress/pull/461) [#455](https://github.com/klauspost/compress/pull/455) [#452](https://github.com/klauspost/compress/pull/452) [#458](https://github.com/klauspost/compress/pull/458) + * zstd: Performance improvement in [#420]( https://github.com/klauspost/compress/pull/420) [#456](https://github.com/klauspost/compress/pull/456) [#437](https://github.com/klauspost/compress/pull/437) [#467](https://github.com/klauspost/compress/pull/467) [#468](https://github.com/klauspost/compress/pull/468) + * zstd: add arm64 xxhash assembly in [#464](https://github.com/klauspost/compress/pull/464) + * Add garbled for binaries for s2 in [#445](https://github.com/klauspost/compress/pull/445) +
+ +
+ See changes to v1.13.x + +* Aug 30, 2021 (v1.13.5) + * gz/zlib/flate: Alias stdlib errors [#425](https://github.com/klauspost/compress/pull/425) + * s2: Add block support to commandline tools [#413](https://github.com/klauspost/compress/pull/413) + * zstd: pooledZipWriter should return Writers to the same pool [#426](https://github.com/klauspost/compress/pull/426) + * Removed golang/snappy as external dependency for tests [#421](https://github.com/klauspost/compress/pull/421) + +* Aug 12, 2021 (v1.13.4) + * Add [snappy replacement package](https://github.com/klauspost/compress/tree/master/snappy). + * zstd: Fix incorrect encoding in "best" mode [#415](https://github.com/klauspost/compress/pull/415) + +* Aug 3, 2021 (v1.13.3) + * zstd: Improve Best compression [#404](https://github.com/klauspost/compress/pull/404) + * zstd: Fix WriteTo error forwarding [#411](https://github.com/klauspost/compress/pull/411) + * gzhttp: Return http.HandlerFunc instead of http.Handler. Unlikely breaking change. [#406](https://github.com/klauspost/compress/pull/406) + * s2sx: Fix max size error [#399](https://github.com/klauspost/compress/pull/399) + * zstd: Add optional stream content size on reset [#401](https://github.com/klauspost/compress/pull/401) + * zstd: use SpeedBestCompression for level >= 10 [#410](https://github.com/klauspost/compress/pull/410) + +* Jun 14, 2021 (v1.13.1) + * s2: Add full Snappy output support [#396](https://github.com/klauspost/compress/pull/396) + * zstd: Add configurable [Decoder window](https://pkg.go.dev/github.com/klauspost/compress/zstd#WithDecoderMaxWindow) size [#394](https://github.com/klauspost/compress/pull/394) + * gzhttp: Add header to skip compression [#389](https://github.com/klauspost/compress/pull/389) + * s2: Improve speed with bigger output margin [#395](https://github.com/klauspost/compress/pull/395) + +* Jun 3, 2021 (v1.13.0) + * Added [gzhttp](https://github.com/klauspost/compress/tree/master/gzhttp#gzip-handler) which allows wrapping HTTP servers and clients with GZIP compressors. + * zstd: Detect short invalid signatures [#382](https://github.com/klauspost/compress/pull/382) + * zstd: Spawn decoder goroutine only if needed. [#380](https://github.com/klauspost/compress/pull/380) +
+ + +
+ See changes to v1.12.x + +* May 25, 2021 (v1.12.3) + * deflate: Better/faster Huffman encoding [#374](https://github.com/klauspost/compress/pull/374) + * deflate: Allocate less for history. [#375](https://github.com/klauspost/compress/pull/375) + * zstd: Forward read errors [#373](https://github.com/klauspost/compress/pull/373) + +* Apr 27, 2021 (v1.12.2) + * zstd: Improve better/best compression [#360](https://github.com/klauspost/compress/pull/360) [#364](https://github.com/klauspost/compress/pull/364) [#365](https://github.com/klauspost/compress/pull/365) + * zstd: Add helpers to compress/decompress zstd inside zip files [#363](https://github.com/klauspost/compress/pull/363) + * deflate: Improve level 5+6 compression [#367](https://github.com/klauspost/compress/pull/367) + * s2: Improve better/best compression [#358](https://github.com/klauspost/compress/pull/358) [#359](https://github.com/klauspost/compress/pull/358) + * s2: Load after checking src limit on amd64. [#362](https://github.com/klauspost/compress/pull/362) + * s2sx: Limit max executable size [#368](https://github.com/klauspost/compress/pull/368) + +* Apr 14, 2021 (v1.12.1) + * snappy package removed. Upstream added as dependency. + * s2: Better compression in "best" mode [#353](https://github.com/klauspost/compress/pull/353) + * s2sx: Add stdin input and detect pre-compressed from signature [#352](https://github.com/klauspost/compress/pull/352) + * s2c/s2d: Add http as possible input [#348](https://github.com/klauspost/compress/pull/348) + * s2c/s2d/s2sx: Always truncate when writing files [#352](https://github.com/klauspost/compress/pull/352) + * zstd: Reduce memory usage further when using [WithLowerEncoderMem](https://pkg.go.dev/github.com/klauspost/compress/zstd#WithLowerEncoderMem) [#346](https://github.com/klauspost/compress/pull/346) + * s2: Fix potential problem with amd64 assembly and profilers [#349](https://github.com/klauspost/compress/pull/349) +
+ +
+ See changes to v1.11.x + +* Mar 26, 2021 (v1.11.13) + * zstd: Big speedup on small dictionary encodes [#344](https://github.com/klauspost/compress/pull/344) [#345](https://github.com/klauspost/compress/pull/345) + * zstd: Add [WithLowerEncoderMem](https://pkg.go.dev/github.com/klauspost/compress/zstd#WithLowerEncoderMem) encoder option [#336](https://github.com/klauspost/compress/pull/336) + * deflate: Improve entropy compression [#338](https://github.com/klauspost/compress/pull/338) + * s2: Clean up and minor performance improvement in best [#341](https://github.com/klauspost/compress/pull/341) + +* Mar 5, 2021 (v1.11.12) + * s2: Add `s2sx` binary that creates [self extracting archives](https://github.com/klauspost/compress/tree/master/s2#s2sx-self-extracting-archives). + * s2: Speed up decompression on non-assembly platforms [#328](https://github.com/klauspost/compress/pull/328) + +* Mar 1, 2021 (v1.11.9) + * s2: Add ARM64 decompression assembly. Around 2x output speed. [#324](https://github.com/klauspost/compress/pull/324) + * s2: Improve "better" speed and efficiency. [#325](https://github.com/klauspost/compress/pull/325) + * s2: Fix binaries. + +* Feb 25, 2021 (v1.11.8) + * s2: Fixed occasional out-of-bounds write on amd64. Upgrade recommended. + * s2: Add AMD64 assembly for better mode. 25-50% faster. [#315](https://github.com/klauspost/compress/pull/315) + * s2: Less upfront decoder allocation. [#322](https://github.com/klauspost/compress/pull/322) + * zstd: Faster "compression" of incompressible data. [#314](https://github.com/klauspost/compress/pull/314) + * zip: Fix zip64 headers. [#313](https://github.com/klauspost/compress/pull/313) + +* Jan 14, 2021 (v1.11.7) + * Use Bytes() interface to get bytes across packages. [#309](https://github.com/klauspost/compress/pull/309) + * s2: Add 'best' compression option. [#310](https://github.com/klauspost/compress/pull/310) + * s2: Add ReaderMaxBlockSize, changes `s2.NewReader` signature to include varargs. [#311](https://github.com/klauspost/compress/pull/311) + * s2: Fix crash on small better buffers. [#308](https://github.com/klauspost/compress/pull/308) + * s2: Clean up decoder. [#312](https://github.com/klauspost/compress/pull/312) + +* Jan 7, 2021 (v1.11.6) + * zstd: Make decoder allocations smaller [#306](https://github.com/klauspost/compress/pull/306) + * zstd: Free Decoder resources when Reset is called with a nil io.Reader [#305](https://github.com/klauspost/compress/pull/305) + +* Dec 20, 2020 (v1.11.4) + * zstd: Add Best compression mode [#304](https://github.com/klauspost/compress/pull/304) + * Add header decoder [#299](https://github.com/klauspost/compress/pull/299) + * s2: Add uncompressed stream option [#297](https://github.com/klauspost/compress/pull/297) + * Simplify/speed up small blocks with known max size. [#300](https://github.com/klauspost/compress/pull/300) + * zstd: Always reset literal dict encoder [#303](https://github.com/klauspost/compress/pull/303) + +* Nov 15, 2020 (v1.11.3) + * inflate: 10-15% faster decompression [#293](https://github.com/klauspost/compress/pull/293) + * zstd: Tweak DecodeAll default allocation [#295](https://github.com/klauspost/compress/pull/295) + +* Oct 11, 2020 (v1.11.2) + * s2: Fix out of bounds read in "better" block compression [#291](https://github.com/klauspost/compress/pull/291) + +* Oct 1, 2020 (v1.11.1) + * zstd: Set allLitEntropy true in default configuration [#286](https://github.com/klauspost/compress/pull/286) + +* Sept 8, 2020 (v1.11.0) + * zstd: Add experimental compression [dictionaries](https://github.com/klauspost/compress/tree/master/zstd#dictionaries) [#281](https://github.com/klauspost/compress/pull/281) + * zstd: Fix mixed Write and ReadFrom calls [#282](https://github.com/klauspost/compress/pull/282) + * inflate/gz: Limit variable shifts, ~5% faster decompression [#274](https://github.com/klauspost/compress/pull/274) +
+ +
+ See changes to v1.10.x + +* July 8, 2020 (v1.10.11) + * zstd: Fix extra block when compressing with ReadFrom. [#278](https://github.com/klauspost/compress/pull/278) + * huff0: Also populate compression table when reading decoding table. [#275](https://github.com/klauspost/compress/pull/275) + +* June 23, 2020 (v1.10.10) + * zstd: Skip entropy compression in fastest mode when no matches. [#270](https://github.com/klauspost/compress/pull/270) + +* June 16, 2020 (v1.10.9): + * zstd: API change for specifying dictionaries. See [#268](https://github.com/klauspost/compress/pull/268) + * zip: update CreateHeaderRaw to handle zip64 fields. [#266](https://github.com/klauspost/compress/pull/266) + * Fuzzit tests removed. The service has been purchased and is no longer available. + +* June 5, 2020 (v1.10.8): + * 1.15x faster zstd block decompression. [#265](https://github.com/klauspost/compress/pull/265) + +* June 1, 2020 (v1.10.7): + * Added zstd decompression [dictionary support](https://github.com/klauspost/compress/tree/master/zstd#dictionaries) + * Increase zstd decompression speed up to 1.19x. [#259](https://github.com/klauspost/compress/pull/259) + * Remove internal reset call in zstd compression and reduce allocations. [#263](https://github.com/klauspost/compress/pull/263) + +* May 21, 2020: (v1.10.6) + * zstd: Reduce allocations while decoding. [#258](https://github.com/klauspost/compress/pull/258), [#252](https://github.com/klauspost/compress/pull/252) + * zstd: Stricter decompression checks. + +* April 12, 2020: (v1.10.5) + * s2-commands: Flush output when receiving SIGINT. [#239](https://github.com/klauspost/compress/pull/239) + +* Apr 8, 2020: (v1.10.4) + * zstd: Minor/special case optimizations. [#251](https://github.com/klauspost/compress/pull/251), [#250](https://github.com/klauspost/compress/pull/250), [#249](https://github.com/klauspost/compress/pull/249), [#247](https://github.com/klauspost/compress/pull/247) +* Mar 11, 2020: (v1.10.3) + * s2: Use S2 encoder in pure Go mode for Snappy output as well. [#245](https://github.com/klauspost/compress/pull/245) + * s2: Fix pure Go block encoder. [#244](https://github.com/klauspost/compress/pull/244) + * zstd: Added "better compression" mode. [#240](https://github.com/klauspost/compress/pull/240) + * zstd: Improve speed of fastest compression mode by 5-10% [#241](https://github.com/klauspost/compress/pull/241) + * zstd: Skip creating encoders when not needed. [#238](https://github.com/klauspost/compress/pull/238) + +* Feb 27, 2020: (v1.10.2) + * Close to 50% speedup in inflate (gzip/zip decompression). [#236](https://github.com/klauspost/compress/pull/236) [#234](https://github.com/klauspost/compress/pull/234) [#232](https://github.com/klauspost/compress/pull/232) + * Reduce deflate level 1-6 memory usage up to 59%. [#227](https://github.com/klauspost/compress/pull/227) + +* Feb 18, 2020: (v1.10.1) + * Fix zstd crash when resetting multiple times without sending data. [#226](https://github.com/klauspost/compress/pull/226) + * deflate: Fix dictionary use on level 1-6. [#224](https://github.com/klauspost/compress/pull/224) + * Remove deflate writer reference when closing. [#224](https://github.com/klauspost/compress/pull/224) + +* Feb 4, 2020: (v1.10.0) + * Add optional dictionary to [stateless deflate](https://pkg.go.dev/github.com/klauspost/compress/flate?tab=doc#StatelessDeflate). Breaking change, send `nil` for previous behaviour. [#216](https://github.com/klauspost/compress/pull/216) + * Fix buffer overflow on repeated small block deflate. [#218](https://github.com/klauspost/compress/pull/218) + * Allow copying content from an existing ZIP file without decompressing+compressing. [#214](https://github.com/klauspost/compress/pull/214) + * Added [S2](https://github.com/klauspost/compress/tree/master/s2#s2-compression) AMD64 assembler and various optimizations. Stream speed >10GB/s. [#186](https://github.com/klauspost/compress/pull/186) + +
+ +
+ See changes prior to v1.10.0 + +* Jan 20,2020 (v1.9.8) Optimize gzip/deflate with better size estimates and faster table generation. [#207](https://github.com/klauspost/compress/pull/207) by [luyu6056](https://github.com/luyu6056), [#206](https://github.com/klauspost/compress/pull/206). +* Jan 11, 2020: S2 Encode/Decode will use provided buffer if capacity is big enough. [#204](https://github.com/klauspost/compress/pull/204) +* Jan 5, 2020: (v1.9.7) Fix another zstd regression in v1.9.5 - v1.9.6 removed. +* Jan 4, 2020: (v1.9.6) Regression in v1.9.5 fixed causing corrupt zstd encodes in rare cases. +* Jan 4, 2020: Faster IO in [s2c + s2d commandline tools](https://github.com/klauspost/compress/tree/master/s2#commandline-tools) compression/decompression. [#192](https://github.com/klauspost/compress/pull/192) +* Dec 29, 2019: Removed v1.9.5 since fuzz tests showed a compatibility problem with the reference zstandard decoder. +* Dec 29, 2019: (v1.9.5) zstd: 10-20% faster block compression. [#199](https://github.com/klauspost/compress/pull/199) +* Dec 29, 2019: [zip](https://godoc.org/github.com/klauspost/compress/zip) package updated with latest Go features +* Dec 29, 2019: zstd: Single segment flag condintions tweaked. [#197](https://github.com/klauspost/compress/pull/197) +* Dec 18, 2019: s2: Faster compression when ReadFrom is used. [#198](https://github.com/klauspost/compress/pull/198) +* Dec 10, 2019: s2: Fix repeat length output when just above at 16MB limit. +* Dec 10, 2019: zstd: Add function to get decoder as io.ReadCloser. [#191](https://github.com/klauspost/compress/pull/191) +* Dec 3, 2019: (v1.9.4) S2: limit max repeat length. [#188](https://github.com/klauspost/compress/pull/188) +* Dec 3, 2019: Add [WithNoEntropyCompression](https://godoc.org/github.com/klauspost/compress/zstd#WithNoEntropyCompression) to zstd [#187](https://github.com/klauspost/compress/pull/187) +* Dec 3, 2019: Reduce memory use for tests. Check for leaked goroutines. +* Nov 28, 2019 (v1.9.3) Less allocations in stateless deflate. +* Nov 28, 2019: 5-20% Faster huff0 decode. Impacts zstd as well. [#184](https://github.com/klauspost/compress/pull/184) +* Nov 12, 2019 (v1.9.2) Added [Stateless Compression](#stateless-compression) for gzip/deflate. +* Nov 12, 2019: Fixed zstd decompression of large single blocks. [#180](https://github.com/klauspost/compress/pull/180) +* Nov 11, 2019: Set default [s2c](https://github.com/klauspost/compress/tree/master/s2#commandline-tools) block size to 4MB. +* Nov 11, 2019: Reduce inflate memory use by 1KB. +* Nov 10, 2019: Less allocations in deflate bit writer. +* Nov 10, 2019: Fix inconsistent error returned by zstd decoder. +* Oct 28, 2019 (v1.9.1) ztsd: Fix crash when compressing blocks. [#174](https://github.com/klauspost/compress/pull/174) +* Oct 24, 2019 (v1.9.0) zstd: Fix rare data corruption [#173](https://github.com/klauspost/compress/pull/173) +* Oct 24, 2019 zstd: Fix huff0 out of buffer write [#171](https://github.com/klauspost/compress/pull/171) and always return errors [#172](https://github.com/klauspost/compress/pull/172) +* Oct 10, 2019: Big deflate rewrite, 30-40% faster with better compression [#105](https://github.com/klauspost/compress/pull/105) + +
+ +
+ See changes prior to v1.9.0 + +* Oct 10, 2019: (v1.8.6) zstd: Allow partial reads to get flushed data. [#169](https://github.com/klauspost/compress/pull/169) +* Oct 3, 2019: Fix inconsistent results on broken zstd streams. +* Sep 25, 2019: Added `-rm` (remove source files) and `-q` (no output except errors) to `s2c` and `s2d` [commands](https://github.com/klauspost/compress/tree/master/s2#commandline-tools) +* Sep 16, 2019: (v1.8.4) Add `s2c` and `s2d` [commandline tools](https://github.com/klauspost/compress/tree/master/s2#commandline-tools). +* Sep 10, 2019: (v1.8.3) Fix s2 decoder [Skip](https://godoc.org/github.com/klauspost/compress/s2#Reader.Skip). +* Sep 7, 2019: zstd: Added [WithWindowSize](https://godoc.org/github.com/klauspost/compress/zstd#WithWindowSize), contributed by [ianwilkes](https://github.com/ianwilkes). +* Sep 5, 2019: (v1.8.2) Add [WithZeroFrames](https://godoc.org/github.com/klauspost/compress/zstd#WithZeroFrames) which adds full zero payload block encoding option. +* Sep 5, 2019: Lazy initialization of zstandard predefined en/decoder tables. +* Aug 26, 2019: (v1.8.1) S2: 1-2% compression increase in "better" compression mode. +* Aug 26, 2019: zstd: Check maximum size of Huffman 1X compressed literals while decoding. +* Aug 24, 2019: (v1.8.0) Added [S2 compression](https://github.com/klauspost/compress/tree/master/s2#s2-compression), a high performance replacement for Snappy. +* Aug 21, 2019: (v1.7.6) Fixed minor issues found by fuzzer. One could lead to zstd not decompressing. +* Aug 18, 2019: Add [fuzzit](https://fuzzit.dev/) continuous fuzzing. +* Aug 14, 2019: zstd: Skip incompressible data 2x faster. [#147](https://github.com/klauspost/compress/pull/147) +* Aug 4, 2019 (v1.7.5): Better literal compression. [#146](https://github.com/klauspost/compress/pull/146) +* Aug 4, 2019: Faster zstd compression. [#143](https://github.com/klauspost/compress/pull/143) [#144](https://github.com/klauspost/compress/pull/144) +* Aug 4, 2019: Faster zstd decompression. [#145](https://github.com/klauspost/compress/pull/145) [#143](https://github.com/klauspost/compress/pull/143) [#142](https://github.com/klauspost/compress/pull/142) +* July 15, 2019 (v1.7.4): Fix double EOF block in rare cases on zstd encoder. +* July 15, 2019 (v1.7.3): Minor speedup/compression increase in default zstd encoder. +* July 14, 2019: zstd decoder: Fix decompression error on multiple uses with mixed content. +* July 7, 2019 (v1.7.2): Snappy update, zstd decoder potential race fix. +* June 17, 2019: zstd decompression bugfix. +* June 17, 2019: fix 32 bit builds. +* June 17, 2019: Easier use in modules (less dependencies). +* June 9, 2019: New stronger "default" [zstd](https://github.com/klauspost/compress/tree/master/zstd#zstd) compression mode. Matches zstd default compression ratio. +* June 5, 2019: 20-40% throughput in [zstandard](https://github.com/klauspost/compress/tree/master/zstd#zstd) compression and better compression. +* June 5, 2019: deflate/gzip compression: Reduce memory usage of lower compression levels. +* June 2, 2019: Added [zstandard](https://github.com/klauspost/compress/tree/master/zstd#zstd) compression! +* May 25, 2019: deflate/gzip: 10% faster bit writer, mostly visible in lower levels. +* Apr 22, 2019: [zstd](https://github.com/klauspost/compress/tree/master/zstd#zstd) decompression added. +* Aug 1, 2018: Added [huff0 README](https://github.com/klauspost/compress/tree/master/huff0#huff0-entropy-compression). +* Jul 8, 2018: Added [Performance Update 2018](#performance-update-2018) below. +* Jun 23, 2018: Merged [Go 1.11 inflate optimizations](https://go-review.googlesource.com/c/go/+/102235). Go 1.9 is now required. Backwards compatible version tagged with [v1.3.0](https://github.com/klauspost/compress/releases/tag/v1.3.0). +* Apr 2, 2018: Added [huff0](https://godoc.org/github.com/klauspost/compress/huff0) en/decoder. Experimental for now, API may change. +* Mar 4, 2018: Added [FSE Entropy](https://godoc.org/github.com/klauspost/compress/fse) en/decoder. Experimental for now, API may change. +* Nov 3, 2017: Add compression [Estimate](https://godoc.org/github.com/klauspost/compress#Estimate) function. +* May 28, 2017: Reduce allocations when resetting decoder. +* Apr 02, 2017: Change back to official crc32, since changes were merged in Go 1.7. +* Jan 14, 2017: Reduce stack pressure due to array copies. See [Issue #18625](https://github.com/golang/go/issues/18625). +* Oct 25, 2016: Level 2-4 have been rewritten and now offers significantly better performance than before. +* Oct 20, 2016: Port zlib changes from Go 1.7 to fix zlib writer issue. Please update. +* Oct 16, 2016: Go 1.7 changes merged. Apples to apples this package is a few percent faster, but has a significantly better balance between speed and compression per level. +* Mar 24, 2016: Always attempt Huffman encoding on level 4-7. This improves base 64 encoded data compression. +* Mar 24, 2016: Small speedup for level 1-3. +* Feb 19, 2016: Faster bit writer, level -2 is 15% faster, level 1 is 4% faster. +* Feb 19, 2016: Handle small payloads faster in level 1-3. +* Feb 19, 2016: Added faster level 2 + 3 compression modes. +* Feb 19, 2016: [Rebalanced compression levels](https://blog.klauspost.com/rebalancing-deflate-compression-levels/), so there is a more even progression in terms of compression. New default level is 5. +* Feb 14, 2016: Snappy: Merge upstream changes. +* Feb 14, 2016: Snappy: Fix aggressive skipping. +* Feb 14, 2016: Snappy: Update benchmark. +* Feb 13, 2016: Deflate: Fixed assembler problem that could lead to sub-optimal compression. +* Feb 12, 2016: Snappy: Added AMD64 SSE 4.2 optimizations to matching, which makes easy to compress material run faster. Typical speedup is around 25%. +* Feb 9, 2016: Added Snappy package fork. This version is 5-7% faster, much more on hard to compress content. +* Jan 30, 2016: Optimize level 1 to 3 by not considering static dictionary or storing uncompressed. ~4-5% speedup. +* Jan 16, 2016: Optimization on deflate level 1,2,3 compression. +* Jan 8 2016: Merge [CL 18317](https://go-review.googlesource.com/#/c/18317): fix reading, writing of zip64 archives. +* Dec 8 2015: Make level 1 and -2 deterministic even if write size differs. +* Dec 8 2015: Split encoding functions, so hashing and matching can potentially be inlined. 1-3% faster on AMD64. 5% faster on other platforms. +* Dec 8 2015: Fixed rare [one byte out-of bounds read](https://github.com/klauspost/compress/issues/20). Please update! +* Nov 23 2015: Optimization on token writer. ~2-4% faster. Contributed by [@dsnet](https://github.com/dsnet). +* Nov 20 2015: Small optimization to bit writer on 64 bit systems. +* Nov 17 2015: Fixed out-of-bound errors if the underlying Writer returned an error. See [#15](https://github.com/klauspost/compress/issues/15). +* Nov 12 2015: Added [io.WriterTo](https://golang.org/pkg/io/#WriterTo) support to gzip/inflate. +* Nov 11 2015: Merged [CL 16669](https://go-review.googlesource.com/#/c/16669/4): archive/zip: enable overriding (de)compressors per file +* Oct 15 2015: Added skipping on uncompressible data. Random data speed up >5x. + +
+ +# deflate usage + +The packages are drop-in replacements for standard libraries. Simply replace the import path to use them: + +Typical speed is about 2x of the standard library packages. + +| old import | new import | Documentation | +|------------------|---------------------------------------|-------------------------------------------------------------------------| +| `compress/gzip` | `github.com/klauspost/compress/gzip` | [gzip](https://pkg.go.dev/github.com/klauspost/compress/gzip?tab=doc) | +| `compress/zlib` | `github.com/klauspost/compress/zlib` | [zlib](https://pkg.go.dev/github.com/klauspost/compress/zlib?tab=doc) | +| `archive/zip` | `github.com/klauspost/compress/zip` | [zip](https://pkg.go.dev/github.com/klauspost/compress/zip?tab=doc) | +| `compress/flate` | `github.com/klauspost/compress/flate` | [flate](https://pkg.go.dev/github.com/klauspost/compress/flate?tab=doc) | + +* Optimized [deflate](https://godoc.org/github.com/klauspost/compress/flate) packages which can be used as a dropin replacement for [gzip](https://godoc.org/github.com/klauspost/compress/gzip), [zip](https://godoc.org/github.com/klauspost/compress/zip) and [zlib](https://godoc.org/github.com/klauspost/compress/zlib). + +You may also be interested in [pgzip](https://github.com/klauspost/pgzip), which is a drop in replacement for gzip, which support multithreaded compression on big files and the optimized [crc32](https://github.com/klauspost/crc32) package used by these packages. + +The packages contains the same as the standard library, so you can use the godoc for that: [gzip](http://golang.org/pkg/compress/gzip/), [zip](http://golang.org/pkg/archive/zip/), [zlib](http://golang.org/pkg/compress/zlib/), [flate](http://golang.org/pkg/compress/flate/). + +Currently there is only minor speedup on decompression (mostly CRC32 calculation). + +Memory usage is typically 1MB for a Writer. stdlib is in the same range. +If you expect to have a lot of concurrently allocated Writers consider using +the stateless compress described below. + +For compression performance, see: [this spreadsheet](https://docs.google.com/spreadsheets/d/1nuNE2nPfuINCZJRMt6wFWhKpToF95I47XjSsc-1rbPQ/edit?usp=sharing). + +To disable all assembly add `-tags=noasm`. This works across all packages. + +# Stateless compression + +This package offers stateless compression as a special option for gzip/deflate. +It will do compression but without maintaining any state between Write calls. + +This means there will be no memory kept between Write calls, but compression and speed will be suboptimal. + +This is only relevant in cases where you expect to run many thousands of compressors concurrently, +but with very little activity. This is *not* intended for regular web servers serving individual requests. + +Because of this, the size of actual Write calls will affect output size. + +In gzip, specify level `-3` / `gzip.StatelessCompression` to enable. + +For direct deflate use, NewStatelessWriter and StatelessDeflate are available. See [documentation](https://godoc.org/github.com/klauspost/compress/flate#NewStatelessWriter) + +A `bufio.Writer` can of course be used to control write sizes. For example, to use a 4KB buffer: + +```go + // replace 'ioutil.Discard' with your output. + gzw, err := gzip.NewWriterLevel(ioutil.Discard, gzip.StatelessCompression) + if err != nil { + return err + } + defer gzw.Close() + + w := bufio.NewWriterSize(gzw, 4096) + defer w.Flush() + + // Write to 'w' +``` + +This will only use up to 4KB in memory when the writer is idle. + +Compression is almost always worse than the fastest compression level +and each write will allocate (a little) memory. + + +# Other packages + +Here are other packages of good quality and pure Go (no cgo wrappers or autoconverted code): + +* [github.com/pierrec/lz4](https://github.com/pierrec/lz4) - strong multithreaded LZ4 compression. +* [github.com/cosnicolaou/pbzip2](https://github.com/cosnicolaou/pbzip2) - multithreaded bzip2 decompression. +* [github.com/dsnet/compress](https://github.com/dsnet/compress) - brotli decompression, bzip2 writer. +* [github.com/ronanh/intcomp](https://github.com/ronanh/intcomp) - Integer compression. +* [github.com/spenczar/fpc](https://github.com/spenczar/fpc) - Float compression. +* [github.com/minio/zipindex](https://github.com/minio/zipindex) - External ZIP directory index. +* [github.com/ybirader/pzip](https://github.com/ybirader/pzip) - Fast concurrent zip archiver and extractor. + +# license + +This code is licensed under the same conditions as the original Go code. See LICENSE file. diff --git a/backend/vendor/github.com/klauspost/compress/SECURITY.md b/backend/vendor/github.com/klauspost/compress/SECURITY.md new file mode 100644 index 0000000..ca6685e --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/SECURITY.md @@ -0,0 +1,25 @@ +# Security Policy + +## Supported Versions + +Security updates are applied only to the latest release. + +## Vulnerability Definition + +A security vulnerability is a bug that with certain input triggers a crash or an infinite loop. Most calls will have varying execution time and only in rare cases will slow operation be considered a security vulnerability. + +Corrupted output generally is not considered a security vulnerability, unless independent operations are able to affect each other. Note that not all functionality is re-entrant and safe to use concurrently. + +Out-of-memory crashes only applies if the en/decoder uses an abnormal amount of memory, with appropriate options applied, to limit maximum window size, concurrency, etc. However, if you are in doubt you are welcome to file a security issue. + +It is assumed that all callers are trusted, meaning internal data exposed through reflection or inspection of returned data structures is not considered a vulnerability. + +Vulnerabilities resulting from compiler/assembler errors should be reported upstream. Depending on the severity this package may or may not implement a workaround. + +## Reporting a Vulnerability + +If you have discovered a security vulnerability in this project, please report it privately. **Do not disclose it as a public issue.** This gives us time to work with you to fix the issue before public exposure, reducing the chance that the exploit will be used before a patch is released. + +Please disclose it at [security advisory](https://github.com/klauspost/compress/security/advisories/new). If possible please provide a minimal reproducer. If the issue only applies to a single platform, it would be helpful to provide access to that. + +This project is maintained by a team of volunteers on a reasonable-effort basis. As such, vulnerabilities will be disclosed in a best effort base. diff --git a/backend/vendor/github.com/klauspost/compress/compressible.go b/backend/vendor/github.com/klauspost/compress/compressible.go new file mode 100644 index 0000000..ea5a692 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/compressible.go @@ -0,0 +1,85 @@ +package compress + +import "math" + +// Estimate returns a normalized compressibility estimate of block b. +// Values close to zero are likely uncompressible. +// Values above 0.1 are likely to be compressible. +// Values above 0.5 are very compressible. +// Very small lengths will return 0. +func Estimate(b []byte) float64 { + if len(b) < 16 { + return 0 + } + + // Correctly predicted order 1 + hits := 0 + lastMatch := false + var o1 [256]byte + var hist [256]int + c1 := byte(0) + for _, c := range b { + if c == o1[c1] { + // We only count a hit if there was two correct predictions in a row. + if lastMatch { + hits++ + } + lastMatch = true + } else { + lastMatch = false + } + o1[c1] = c + c1 = c + hist[c]++ + } + + // Use x^0.6 to give better spread + prediction := math.Pow(float64(hits)/float64(len(b)), 0.6) + + // Calculate histogram distribution + variance := float64(0) + avg := float64(len(b)) / 256 + + for _, v := range hist { + Δ := float64(v) - avg + variance += Δ * Δ + } + + stddev := math.Sqrt(float64(variance)) / float64(len(b)) + exp := math.Sqrt(1 / float64(len(b))) + + // Subtract expected stddev + stddev -= exp + if stddev < 0 { + stddev = 0 + } + stddev *= 1 + exp + + // Use x^0.4 to give better spread + entropy := math.Pow(stddev, 0.4) + + // 50/50 weight between prediction and histogram distribution + return math.Pow((prediction+entropy)/2, 0.9) +} + +// ShannonEntropyBits returns the number of bits minimum required to represent +// an entropy encoding of the input bytes. +// https://en.wiktionary.org/wiki/Shannon_entropy +func ShannonEntropyBits(b []byte) int { + if len(b) == 0 { + return 0 + } + var hist [256]int + for _, c := range b { + hist[c]++ + } + shannon := float64(0) + invTotal := 1.0 / float64(len(b)) + for _, v := range hist[:] { + if v > 0 { + n := float64(v) + shannon += math.Ceil(-math.Log2(n*invTotal) * n) + } + } + return int(math.Ceil(shannon)) +} diff --git a/backend/vendor/github.com/klauspost/compress/fse/README.md b/backend/vendor/github.com/klauspost/compress/fse/README.md new file mode 100644 index 0000000..ea7324d --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/fse/README.md @@ -0,0 +1,79 @@ +# Finite State Entropy + +This package provides Finite State Entropy encoding and decoding. + +Finite State Entropy (also referenced as [tANS](https://en.wikipedia.org/wiki/Asymmetric_numeral_systems#tANS)) +encoding provides a fast near-optimal symbol encoding/decoding +for byte blocks as implemented in [zstandard](https://github.com/facebook/zstd). + +This can be used for compressing input with a lot of similar input values to the smallest number of bytes. +This does not perform any multi-byte [dictionary coding](https://en.wikipedia.org/wiki/Dictionary_coder) as LZ coders, +but it can be used as a secondary step to compressors (like Snappy) that does not do entropy encoding. + +* [Godoc documentation](https://godoc.org/github.com/klauspost/compress/fse) + +## News + + * Feb 2018: First implementation released. Consider this beta software for now. + +# Usage + +This package provides a low level interface that allows to compress single independent blocks. + +Each block is separate, and there is no built in integrity checks. +This means that the caller should keep track of block sizes and also do checksums if needed. + +Compressing a block is done via the [`Compress`](https://godoc.org/github.com/klauspost/compress/fse#Compress) function. +You must provide input and will receive the output and maybe an error. + +These error values can be returned: + +| Error | Description | +|---------------------|-----------------------------------------------------------------------------| +| `` | Everything ok, output is returned | +| `ErrIncompressible` | Returned when input is judged to be too hard to compress | +| `ErrUseRLE` | Returned from the compressor when the input is a single byte value repeated | +| `(error)` | An internal error occurred. | + +As can be seen above there are errors that will be returned even under normal operation so it is important to handle these. + +To reduce allocations you can provide a [`Scratch`](https://godoc.org/github.com/klauspost/compress/fse#Scratch) object +that can be re-used for successive calls. Both compression and decompression accepts a `Scratch` object, and the same +object can be used for both. + +Be aware, that when re-using a `Scratch` object that the *output* buffer is also re-used, so if you are still using this +you must set the `Out` field in the scratch to nil. The same buffer is used for compression and decompression output. + +Decompressing is done by calling the [`Decompress`](https://godoc.org/github.com/klauspost/compress/fse#Decompress) function. +You must provide the output from the compression stage, at exactly the size you got back. If you receive an error back +your input was likely corrupted. + +It is important to note that a successful decoding does *not* mean your output matches your original input. +There are no integrity checks, so relying on errors from the decompressor does not assure your data is valid. + +For more detailed usage, see examples in the [godoc documentation](https://godoc.org/github.com/klauspost/compress/fse#pkg-examples). + +# Performance + +A lot of factors are affecting speed. Block sizes and compressibility of the material are primary factors. +All compression functions are currently only running on the calling goroutine so only one core will be used per block. + +The compressor is significantly faster if symbols are kept as small as possible. The highest byte value of the input +is used to reduce some of the processing, so if all your input is above byte value 64 for instance, it may be +beneficial to transpose all your input values down by 64. + +With moderate block sizes around 64k speed are typically 200MB/s per core for compression and +around 300MB/s decompression speed. + +The same hardware typically does Huffman (deflate) encoding at 125MB/s and decompression at 100MB/s. + +# Plans + +At one point, more internals will be exposed to facilitate more "expert" usage of the components. + +A streaming interface is also likely to be implemented. Likely compatible with [FSE stream format](https://github.com/Cyan4973/FiniteStateEntropy/blob/dev/programs/fileio.c#L261). + +# Contributing + +Contributions are always welcome. Be aware that adding public functions will require good justification and breaking +changes will likely not be accepted. If in doubt open an issue before writing the PR. \ No newline at end of file diff --git a/backend/vendor/github.com/klauspost/compress/fse/bitreader.go b/backend/vendor/github.com/klauspost/compress/fse/bitreader.go new file mode 100644 index 0000000..f65eb39 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/fse/bitreader.go @@ -0,0 +1,122 @@ +// Copyright 2018 Klaus Post. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. +// Based on work Copyright (c) 2013, Yann Collet, released under BSD License. + +package fse + +import ( + "encoding/binary" + "errors" + "io" +) + +// bitReader reads a bitstream in reverse. +// The last set bit indicates the start of the stream and is used +// for aligning the input. +type bitReader struct { + in []byte + off uint // next byte to read is at in[off - 1] + value uint64 + bitsRead uint8 +} + +// init initializes and resets the bit reader. +func (b *bitReader) init(in []byte) error { + if len(in) < 1 { + return errors.New("corrupt stream: too short") + } + b.in = in + b.off = uint(len(in)) + // The highest bit of the last byte indicates where to start + v := in[len(in)-1] + if v == 0 { + return errors.New("corrupt stream, did not find end of stream") + } + b.bitsRead = 64 + b.value = 0 + if len(in) >= 8 { + b.fillFastStart() + } else { + b.fill() + b.fill() + } + b.bitsRead += 8 - uint8(highBits(uint32(v))) + return nil +} + +// getBits will return n bits. n can be 0. +func (b *bitReader) getBits(n uint8) uint16 { + if n == 0 || b.bitsRead >= 64 { + return 0 + } + return b.getBitsFast(n) +} + +// getBitsFast requires that at least one bit is requested every time. +// There are no checks if the buffer is filled. +func (b *bitReader) getBitsFast(n uint8) uint16 { + const regMask = 64 - 1 + v := uint16((b.value << (b.bitsRead & regMask)) >> ((regMask + 1 - n) & regMask)) + b.bitsRead += n + return v +} + +// fillFast() will make sure at least 32 bits are available. +// There must be at least 4 bytes available. +func (b *bitReader) fillFast() { + if b.bitsRead < 32 { + return + } + // 2 bounds checks. + v := b.in[b.off-4:] + v = v[:4] + low := (uint32(v[0])) | (uint32(v[1]) << 8) | (uint32(v[2]) << 16) | (uint32(v[3]) << 24) + b.value = (b.value << 32) | uint64(low) + b.bitsRead -= 32 + b.off -= 4 +} + +// fill() will make sure at least 32 bits are available. +func (b *bitReader) fill() { + if b.bitsRead < 32 { + return + } + if b.off > 4 { + v := b.in[b.off-4:] + v = v[:4] + low := (uint32(v[0])) | (uint32(v[1]) << 8) | (uint32(v[2]) << 16) | (uint32(v[3]) << 24) + b.value = (b.value << 32) | uint64(low) + b.bitsRead -= 32 + b.off -= 4 + return + } + for b.off > 0 { + b.value = (b.value << 8) | uint64(b.in[b.off-1]) + b.bitsRead -= 8 + b.off-- + } +} + +// fillFastStart() assumes the bitreader is empty and there is at least 8 bytes to read. +func (b *bitReader) fillFastStart() { + // Do single re-slice to avoid bounds checks. + b.value = binary.LittleEndian.Uint64(b.in[b.off-8:]) + b.bitsRead = 0 + b.off -= 8 +} + +// finished returns true if all bits have been read from the bit stream. +func (b *bitReader) finished() bool { + return b.bitsRead >= 64 && b.off == 0 +} + +// close the bitstream and returns an error if out-of-buffer reads occurred. +func (b *bitReader) close() error { + // Release reference. + b.in = nil + if b.bitsRead > 64 { + return io.ErrUnexpectedEOF + } + return nil +} diff --git a/backend/vendor/github.com/klauspost/compress/fse/bitwriter.go b/backend/vendor/github.com/klauspost/compress/fse/bitwriter.go new file mode 100644 index 0000000..d58b3fe --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/fse/bitwriter.go @@ -0,0 +1,167 @@ +// Copyright 2018 Klaus Post. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. +// Based on work Copyright (c) 2013, Yann Collet, released under BSD License. + +package fse + +import "fmt" + +// bitWriter will write bits. +// First bit will be LSB of the first byte of output. +type bitWriter struct { + bitContainer uint64 + nBits uint8 + out []byte +} + +// bitMask16 is bitmasks. Has extra to avoid bounds check. +var bitMask16 = [32]uint16{ + 0, 1, 3, 7, 0xF, 0x1F, + 0x3F, 0x7F, 0xFF, 0x1FF, 0x3FF, 0x7FF, + 0xFFF, 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF, 0xFFFF, + 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, + 0xFFFF, 0xFFFF} /* up to 16 bits */ + +// addBits16NC will add up to 16 bits. +// It will not check if there is space for them, +// so the caller must ensure that it has flushed recently. +func (b *bitWriter) addBits16NC(value uint16, bits uint8) { + b.bitContainer |= uint64(value&bitMask16[bits&31]) << (b.nBits & 63) + b.nBits += bits +} + +// addBits16Clean will add up to 16 bits. value may not contain more set bits than indicated. +// It will not check if there is space for them, so the caller must ensure that it has flushed recently. +func (b *bitWriter) addBits16Clean(value uint16, bits uint8) { + b.bitContainer |= uint64(value) << (b.nBits & 63) + b.nBits += bits +} + +// addBits16ZeroNC will add up to 16 bits. +// It will not check if there is space for them, +// so the caller must ensure that it has flushed recently. +// This is fastest if bits can be zero. +func (b *bitWriter) addBits16ZeroNC(value uint16, bits uint8) { + if bits == 0 { + return + } + value <<= (16 - bits) & 15 + value >>= (16 - bits) & 15 + b.bitContainer |= uint64(value) << (b.nBits & 63) + b.nBits += bits +} + +// flush will flush all pending full bytes. +// There will be at least 56 bits available for writing when this has been called. +// Using flush32 is faster, but leaves less space for writing. +func (b *bitWriter) flush() { + v := b.nBits >> 3 + switch v { + case 0: + case 1: + b.out = append(b.out, + byte(b.bitContainer), + ) + case 2: + b.out = append(b.out, + byte(b.bitContainer), + byte(b.bitContainer>>8), + ) + case 3: + b.out = append(b.out, + byte(b.bitContainer), + byte(b.bitContainer>>8), + byte(b.bitContainer>>16), + ) + case 4: + b.out = append(b.out, + byte(b.bitContainer), + byte(b.bitContainer>>8), + byte(b.bitContainer>>16), + byte(b.bitContainer>>24), + ) + case 5: + b.out = append(b.out, + byte(b.bitContainer), + byte(b.bitContainer>>8), + byte(b.bitContainer>>16), + byte(b.bitContainer>>24), + byte(b.bitContainer>>32), + ) + case 6: + b.out = append(b.out, + byte(b.bitContainer), + byte(b.bitContainer>>8), + byte(b.bitContainer>>16), + byte(b.bitContainer>>24), + byte(b.bitContainer>>32), + byte(b.bitContainer>>40), + ) + case 7: + b.out = append(b.out, + byte(b.bitContainer), + byte(b.bitContainer>>8), + byte(b.bitContainer>>16), + byte(b.bitContainer>>24), + byte(b.bitContainer>>32), + byte(b.bitContainer>>40), + byte(b.bitContainer>>48), + ) + case 8: + b.out = append(b.out, + byte(b.bitContainer), + byte(b.bitContainer>>8), + byte(b.bitContainer>>16), + byte(b.bitContainer>>24), + byte(b.bitContainer>>32), + byte(b.bitContainer>>40), + byte(b.bitContainer>>48), + byte(b.bitContainer>>56), + ) + default: + panic(fmt.Errorf("bits (%d) > 64", b.nBits)) + } + b.bitContainer >>= v << 3 + b.nBits &= 7 +} + +// flush32 will flush out, so there are at least 32 bits available for writing. +func (b *bitWriter) flush32() { + if b.nBits < 32 { + return + } + b.out = append(b.out, + byte(b.bitContainer), + byte(b.bitContainer>>8), + byte(b.bitContainer>>16), + byte(b.bitContainer>>24)) + b.nBits -= 32 + b.bitContainer >>= 32 +} + +// flushAlign will flush remaining full bytes and align to next byte boundary. +func (b *bitWriter) flushAlign() { + nbBytes := (b.nBits + 7) >> 3 + for i := range nbBytes { + b.out = append(b.out, byte(b.bitContainer>>(i*8))) + } + b.nBits = 0 + b.bitContainer = 0 +} + +// close will write the alignment bit and write the final byte(s) +// to the output. +func (b *bitWriter) close() { + // End mark + b.addBits16Clean(1, 1) + // flush until next byte. + b.flushAlign() +} + +// reset and continue writing by appending to out. +func (b *bitWriter) reset(out []byte) { + b.bitContainer = 0 + b.nBits = 0 + b.out = out +} diff --git a/backend/vendor/github.com/klauspost/compress/fse/bytereader.go b/backend/vendor/github.com/klauspost/compress/fse/bytereader.go new file mode 100644 index 0000000..abade2d --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/fse/bytereader.go @@ -0,0 +1,47 @@ +// Copyright 2018 Klaus Post. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. +// Based on work Copyright (c) 2013, Yann Collet, released under BSD License. + +package fse + +// byteReader provides a byte reader that reads +// little endian values from a byte stream. +// The input stream is manually advanced. +// The reader performs no bounds checks. +type byteReader struct { + b []byte + off int +} + +// init will initialize the reader and set the input. +func (b *byteReader) init(in []byte) { + b.b = in + b.off = 0 +} + +// advance the stream b n bytes. +func (b *byteReader) advance(n uint) { + b.off += int(n) +} + +// Uint32 returns a little endian uint32 starting at current offset. +func (b byteReader) Uint32() uint32 { + b2 := b.b[b.off:] + b2 = b2[:4] + v3 := uint32(b2[3]) + v2 := uint32(b2[2]) + v1 := uint32(b2[1]) + v0 := uint32(b2[0]) + return v0 | (v1 << 8) | (v2 << 16) | (v3 << 24) +} + +// unread returns the unread portion of the input. +func (b byteReader) unread() []byte { + return b.b[b.off:] +} + +// remain will return the number of bytes remaining. +func (b byteReader) remain() int { + return len(b.b) - b.off +} diff --git a/backend/vendor/github.com/klauspost/compress/fse/compress.go b/backend/vendor/github.com/klauspost/compress/fse/compress.go new file mode 100644 index 0000000..8c8baa4 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/fse/compress.go @@ -0,0 +1,683 @@ +// Copyright 2018 Klaus Post. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. +// Based on work Copyright (c) 2013, Yann Collet, released under BSD License. + +package fse + +import ( + "errors" + "fmt" +) + +// Compress the input bytes. Input must be < 2GB. +// Provide a Scratch buffer to avoid memory allocations. +// Note that the output is also kept in the scratch buffer. +// If input is too hard to compress, ErrIncompressible is returned. +// If input is a single byte value repeated ErrUseRLE is returned. +func Compress(in []byte, s *Scratch) ([]byte, error) { + if len(in) <= 1 { + return nil, ErrIncompressible + } + if len(in) > (2<<30)-1 { + return nil, errors.New("input too big, must be < 2GB") + } + s, err := s.prepare(in) + if err != nil { + return nil, err + } + + // Create histogram, if none was provided. + maxCount := s.maxCount + if maxCount == 0 { + maxCount = s.countSimple(in) + } + // Reset for next run. + s.clearCount = true + s.maxCount = 0 + if maxCount == len(in) { + // One symbol, use RLE + return nil, ErrUseRLE + } + if maxCount == 1 || maxCount < (len(in)>>7) { + // Each symbol present maximum once or too well distributed. + return nil, ErrIncompressible + } + s.optimalTableLog() + err = s.normalizeCount() + if err != nil { + return nil, err + } + err = s.writeCount() + if err != nil { + return nil, err + } + + if false { + err = s.validateNorm() + if err != nil { + return nil, err + } + } + + err = s.buildCTable() + if err != nil { + return nil, err + } + err = s.compress(in) + if err != nil { + return nil, err + } + s.Out = s.bw.out + // Check if we compressed. + if len(s.Out) >= len(in) { + return nil, ErrIncompressible + } + return s.Out, nil +} + +// cState contains the compression state of a stream. +type cState struct { + bw *bitWriter + stateTable []uint16 + state uint16 +} + +// init will initialize the compression state to the first symbol of the stream. +func (c *cState) init(bw *bitWriter, ct *cTable, tableLog uint8, first symbolTransform) { + c.bw = bw + c.stateTable = ct.stateTable + + nbBitsOut := (first.deltaNbBits + (1 << 15)) >> 16 + im := int32((nbBitsOut << 16) - first.deltaNbBits) + lu := (im >> nbBitsOut) + first.deltaFindState + c.state = c.stateTable[lu] +} + +// encode the output symbol provided and write it to the bitstream. +func (c *cState) encode(symbolTT symbolTransform) { + nbBitsOut := (uint32(c.state) + symbolTT.deltaNbBits) >> 16 + dstState := int32(c.state>>(nbBitsOut&15)) + symbolTT.deltaFindState + c.bw.addBits16NC(c.state, uint8(nbBitsOut)) + c.state = c.stateTable[dstState] +} + +// encode the output symbol provided and write it to the bitstream. +func (c *cState) encodeZero(symbolTT symbolTransform) { + nbBitsOut := (uint32(c.state) + symbolTT.deltaNbBits) >> 16 + dstState := int32(c.state>>(nbBitsOut&15)) + symbolTT.deltaFindState + c.bw.addBits16ZeroNC(c.state, uint8(nbBitsOut)) + c.state = c.stateTable[dstState] +} + +// flush will write the tablelog to the output and flush the remaining full bytes. +func (c *cState) flush(tableLog uint8) { + c.bw.flush32() + c.bw.addBits16NC(c.state, tableLog) + c.bw.flush() +} + +// compress is the main compression loop that will encode the input from the last byte to the first. +func (s *Scratch) compress(src []byte) error { + if len(src) <= 2 { + return errors.New("compress: src too small") + } + tt := s.ct.symbolTT[:256] + s.bw.reset(s.Out) + + // Our two states each encodes every second byte. + // Last byte encoded (first byte decoded) will always be encoded by c1. + var c1, c2 cState + + // Encode so remaining size is divisible by 4. + ip := len(src) + if ip&1 == 1 { + c1.init(&s.bw, &s.ct, s.actualTableLog, tt[src[ip-1]]) + c2.init(&s.bw, &s.ct, s.actualTableLog, tt[src[ip-2]]) + c1.encodeZero(tt[src[ip-3]]) + ip -= 3 + } else { + c2.init(&s.bw, &s.ct, s.actualTableLog, tt[src[ip-1]]) + c1.init(&s.bw, &s.ct, s.actualTableLog, tt[src[ip-2]]) + ip -= 2 + } + if ip&2 != 0 { + c2.encodeZero(tt[src[ip-1]]) + c1.encodeZero(tt[src[ip-2]]) + ip -= 2 + } + src = src[:ip] + + // Main compression loop. + switch { + case !s.zeroBits && s.actualTableLog <= 8: + // We can encode 4 symbols without requiring a flush. + // We do not need to check if any output is 0 bits. + for ; len(src) >= 4; src = src[:len(src)-4] { + s.bw.flush32() + v3, v2, v1, v0 := src[len(src)-4], src[len(src)-3], src[len(src)-2], src[len(src)-1] + c2.encode(tt[v0]) + c1.encode(tt[v1]) + c2.encode(tt[v2]) + c1.encode(tt[v3]) + } + case !s.zeroBits: + // We do not need to check if any output is 0 bits. + for ; len(src) >= 4; src = src[:len(src)-4] { + s.bw.flush32() + v3, v2, v1, v0 := src[len(src)-4], src[len(src)-3], src[len(src)-2], src[len(src)-1] + c2.encode(tt[v0]) + c1.encode(tt[v1]) + s.bw.flush32() + c2.encode(tt[v2]) + c1.encode(tt[v3]) + } + case s.actualTableLog <= 8: + // We can encode 4 symbols without requiring a flush + for ; len(src) >= 4; src = src[:len(src)-4] { + s.bw.flush32() + v3, v2, v1, v0 := src[len(src)-4], src[len(src)-3], src[len(src)-2], src[len(src)-1] + c2.encodeZero(tt[v0]) + c1.encodeZero(tt[v1]) + c2.encodeZero(tt[v2]) + c1.encodeZero(tt[v3]) + } + default: + for ; len(src) >= 4; src = src[:len(src)-4] { + s.bw.flush32() + v3, v2, v1, v0 := src[len(src)-4], src[len(src)-3], src[len(src)-2], src[len(src)-1] + c2.encodeZero(tt[v0]) + c1.encodeZero(tt[v1]) + s.bw.flush32() + c2.encodeZero(tt[v2]) + c1.encodeZero(tt[v3]) + } + } + + // Flush final state. + // Used to initialize state when decoding. + c2.flush(s.actualTableLog) + c1.flush(s.actualTableLog) + + s.bw.close() + return nil +} + +// writeCount will write the normalized histogram count to header. +// This is read back by readNCount. +func (s *Scratch) writeCount() error { + var ( + tableLog = s.actualTableLog + tableSize = 1 << tableLog + previous0 bool + charnum uint16 + + maxHeaderSize = ((int(s.symbolLen)*int(tableLog) + 4 + 2) >> 3) + 3 + + // Write Table Size + bitStream = uint32(tableLog - minTablelog) + bitCount = uint(4) + remaining = int16(tableSize + 1) /* +1 for extra accuracy */ + threshold = int16(tableSize) + nbBits = uint(tableLog + 1) + ) + if cap(s.Out) < maxHeaderSize { + s.Out = make([]byte, 0, s.br.remain()+maxHeaderSize) + } + outP := uint(0) + out := s.Out[:maxHeaderSize] + + // stops at 1 + for remaining > 1 { + if previous0 { + start := charnum + for s.norm[charnum] == 0 { + charnum++ + } + for charnum >= start+24 { + start += 24 + bitStream += uint32(0xFFFF) << bitCount + out[outP] = byte(bitStream) + out[outP+1] = byte(bitStream >> 8) + outP += 2 + bitStream >>= 16 + } + for charnum >= start+3 { + start += 3 + bitStream += 3 << bitCount + bitCount += 2 + } + bitStream += uint32(charnum-start) << bitCount + bitCount += 2 + if bitCount > 16 { + out[outP] = byte(bitStream) + out[outP+1] = byte(bitStream >> 8) + outP += 2 + bitStream >>= 16 + bitCount -= 16 + } + } + + count := s.norm[charnum] + charnum++ + max := (2*threshold - 1) - remaining + if count < 0 { + remaining += count + } else { + remaining -= count + } + count++ // +1 for extra accuracy + if count >= threshold { + count += max // [0..max[ [max..threshold[ (...) [threshold+max 2*threshold[ + } + bitStream += uint32(count) << bitCount + bitCount += nbBits + if count < max { + bitCount-- + } + + previous0 = count == 1 + if remaining < 1 { + return errors.New("internal error: remaining<1") + } + for remaining < threshold { + nbBits-- + threshold >>= 1 + } + + if bitCount > 16 { + out[outP] = byte(bitStream) + out[outP+1] = byte(bitStream >> 8) + outP += 2 + bitStream >>= 16 + bitCount -= 16 + } + } + + out[outP] = byte(bitStream) + out[outP+1] = byte(bitStream >> 8) + outP += (bitCount + 7) / 8 + + if charnum > s.symbolLen { + return errors.New("internal error: charnum > s.symbolLen") + } + s.Out = out[:outP] + return nil +} + +// symbolTransform contains the state transform for a symbol. +type symbolTransform struct { + deltaFindState int32 + deltaNbBits uint32 +} + +// String prints values as a human readable string. +func (s symbolTransform) String() string { + return fmt.Sprintf("dnbits: %08x, fs:%d", s.deltaNbBits, s.deltaFindState) +} + +// cTable contains tables used for compression. +type cTable struct { + tableSymbol []byte + stateTable []uint16 + symbolTT []symbolTransform +} + +// allocCtable will allocate tables needed for compression. +// If existing tables a re big enough, they are simply re-used. +func (s *Scratch) allocCtable() { + tableSize := 1 << s.actualTableLog + // get tableSymbol that is big enough. + if cap(s.ct.tableSymbol) < tableSize { + s.ct.tableSymbol = make([]byte, tableSize) + } + s.ct.tableSymbol = s.ct.tableSymbol[:tableSize] + + ctSize := tableSize + if cap(s.ct.stateTable) < ctSize { + s.ct.stateTable = make([]uint16, ctSize) + } + s.ct.stateTable = s.ct.stateTable[:ctSize] + + if cap(s.ct.symbolTT) < 256 { + s.ct.symbolTT = make([]symbolTransform, 256) + } + s.ct.symbolTT = s.ct.symbolTT[:256] +} + +// buildCTable will populate the compression table so it is ready to be used. +func (s *Scratch) buildCTable() error { + tableSize := uint32(1 << s.actualTableLog) + highThreshold := tableSize - 1 + var cumul [maxSymbolValue + 2]int16 + + s.allocCtable() + tableSymbol := s.ct.tableSymbol[:tableSize] + // symbol start positions + { + cumul[0] = 0 + for ui, v := range s.norm[:s.symbolLen-1] { + u := byte(ui) // one less than reference + if v == -1 { + // Low proba symbol + cumul[u+1] = cumul[u] + 1 + tableSymbol[highThreshold] = u + highThreshold-- + } else { + cumul[u+1] = cumul[u] + v + } + } + // Encode last symbol separately to avoid overflowing u + u := int(s.symbolLen - 1) + v := s.norm[s.symbolLen-1] + if v == -1 { + // Low proba symbol + cumul[u+1] = cumul[u] + 1 + tableSymbol[highThreshold] = byte(u) + highThreshold-- + } else { + cumul[u+1] = cumul[u] + v + } + if uint32(cumul[s.symbolLen]) != tableSize { + return fmt.Errorf("internal error: expected cumul[s.symbolLen] (%d) == tableSize (%d)", cumul[s.symbolLen], tableSize) + } + cumul[s.symbolLen] = int16(tableSize) + 1 + } + // Spread symbols + s.zeroBits = false + { + step := tableStep(tableSize) + tableMask := tableSize - 1 + var position uint32 + // if any symbol > largeLimit, we may have 0 bits output. + largeLimit := int16(1 << (s.actualTableLog - 1)) + for ui, v := range s.norm[:s.symbolLen] { + symbol := byte(ui) + if v > largeLimit { + s.zeroBits = true + } + for range v { + tableSymbol[position] = symbol + position = (position + step) & tableMask + for position > highThreshold { + position = (position + step) & tableMask + } /* Low proba area */ + } + } + + // Check if we have gone through all positions + if position != 0 { + return errors.New("position!=0") + } + } + + // Build table + table := s.ct.stateTable + { + tsi := int(tableSize) + for u, v := range tableSymbol { + // TableU16 : sorted by symbol order; gives next state value + table[cumul[v]] = uint16(tsi + u) + cumul[v]++ + } + } + + // Build Symbol Transformation Table + { + total := int16(0) + symbolTT := s.ct.symbolTT[:s.symbolLen] + tableLog := s.actualTableLog + tl := (uint32(tableLog) << 16) - (1 << tableLog) + for i, v := range s.norm[:s.symbolLen] { + switch v { + case 0: + case -1, 1: + symbolTT[i].deltaNbBits = tl + symbolTT[i].deltaFindState = int32(total - 1) + total++ + default: + maxBitsOut := uint32(tableLog) - highBits(uint32(v-1)) + minStatePlus := uint32(v) << maxBitsOut + symbolTT[i].deltaNbBits = (maxBitsOut << 16) - minStatePlus + symbolTT[i].deltaFindState = int32(total - v) + total += v + } + } + if total != int16(tableSize) { + return fmt.Errorf("total mismatch %d (got) != %d (want)", total, tableSize) + } + } + return nil +} + +// countSimple will create a simple histogram in s.count. +// Returns the biggest count. +// Does not update s.clearCount. +func (s *Scratch) countSimple(in []byte) (max int) { + for _, v := range in { + s.count[v]++ + } + m, symlen := uint32(0), s.symbolLen + for i, v := range s.count[:] { + if v == 0 { + continue + } + if v > m { + m = v + } + symlen = uint16(i) + 1 + } + s.symbolLen = symlen + return int(m) +} + +// minTableLog provides the minimum logSize to safely represent a distribution. +func (s *Scratch) minTableLog() uint8 { + minBitsSrc := highBits(uint32(s.br.remain()-1)) + 1 + minBitsSymbols := highBits(uint32(s.symbolLen-1)) + 2 + if minBitsSrc < minBitsSymbols { + return uint8(minBitsSrc) + } + return uint8(minBitsSymbols) +} + +// optimalTableLog calculates and sets the optimal tableLog in s.actualTableLog +func (s *Scratch) optimalTableLog() { + tableLog := s.TableLog + minBits := s.minTableLog() + maxBitsSrc := uint8(highBits(uint32(s.br.remain()-1))) - 2 + if maxBitsSrc < tableLog { + // Accuracy can be reduced + tableLog = maxBitsSrc + } + if minBits > tableLog { + tableLog = minBits + } + // Need a minimum to safely represent all symbol values + if tableLog < minTablelog { + tableLog = minTablelog + } + if tableLog > maxTableLog { + tableLog = maxTableLog + } + s.actualTableLog = tableLog +} + +var rtbTable = [...]uint32{0, 473195, 504333, 520860, 550000, 700000, 750000, 830000} + +// normalizeCount will normalize the count of the symbols so +// the total is equal to the table size. +func (s *Scratch) normalizeCount() error { + var ( + tableLog = s.actualTableLog + scale = 62 - uint64(tableLog) + step = (1 << 62) / uint64(s.br.remain()) + vStep = uint64(1) << (scale - 20) + stillToDistribute = int16(1 << tableLog) + largest int + largestP int16 + lowThreshold = (uint32)(s.br.remain() >> tableLog) + ) + + for i, cnt := range s.count[:s.symbolLen] { + // already handled + // if (count[s] == s.length) return 0; /* rle special case */ + + if cnt == 0 { + s.norm[i] = 0 + continue + } + if cnt <= lowThreshold { + s.norm[i] = -1 + stillToDistribute-- + } else { + proba := (int16)((uint64(cnt) * step) >> scale) + if proba < 8 { + restToBeat := vStep * uint64(rtbTable[proba]) + v := uint64(cnt)*step - (uint64(proba) << scale) + if v > restToBeat { + proba++ + } + } + if proba > largestP { + largestP = proba + largest = i + } + s.norm[i] = proba + stillToDistribute -= proba + } + } + + if -stillToDistribute >= (s.norm[largest] >> 1) { + // corner case, need another normalization method + return s.normalizeCount2() + } + s.norm[largest] += stillToDistribute + return nil +} + +// Secondary normalization method. +// To be used when primary method fails. +func (s *Scratch) normalizeCount2() error { + const notYetAssigned = -2 + var ( + distributed uint32 + total = uint32(s.br.remain()) + tableLog = s.actualTableLog + lowThreshold = total >> tableLog + lowOne = (total * 3) >> (tableLog + 1) + ) + for i, cnt := range s.count[:s.symbolLen] { + if cnt == 0 { + s.norm[i] = 0 + continue + } + if cnt <= lowThreshold { + s.norm[i] = -1 + distributed++ + total -= cnt + continue + } + if cnt <= lowOne { + s.norm[i] = 1 + distributed++ + total -= cnt + continue + } + s.norm[i] = notYetAssigned + } + toDistribute := (1 << tableLog) - distributed + + if (total / toDistribute) > lowOne { + // risk of rounding to zero + lowOne = (total * 3) / (toDistribute * 2) + for i, cnt := range s.count[:s.symbolLen] { + if (s.norm[i] == notYetAssigned) && (cnt <= lowOne) { + s.norm[i] = 1 + distributed++ + total -= cnt + continue + } + } + toDistribute = (1 << tableLog) - distributed + } + if distributed == uint32(s.symbolLen)+1 { + // all values are pretty poor; + // probably incompressible data (should have already been detected); + // find max, then give all remaining points to max + var maxV int + var maxC uint32 + for i, cnt := range s.count[:s.symbolLen] { + if cnt > maxC { + maxV = i + maxC = cnt + } + } + s.norm[maxV] += int16(toDistribute) + return nil + } + + if total == 0 { + // all of the symbols were low enough for the lowOne or lowThreshold + for i := uint32(0); toDistribute > 0; i = (i + 1) % (uint32(s.symbolLen)) { + if s.norm[i] > 0 { + toDistribute-- + s.norm[i]++ + } + } + return nil + } + + var ( + vStepLog = 62 - uint64(tableLog) + mid = uint64((1 << (vStepLog - 1)) - 1) + rStep = (((1 << vStepLog) * uint64(toDistribute)) + mid) / uint64(total) // scale on remaining + tmpTotal = mid + ) + for i, cnt := range s.count[:s.symbolLen] { + if s.norm[i] == notYetAssigned { + var ( + end = tmpTotal + uint64(cnt)*rStep + sStart = uint32(tmpTotal >> vStepLog) + sEnd = uint32(end >> vStepLog) + weight = sEnd - sStart + ) + if weight < 1 { + return errors.New("weight < 1") + } + s.norm[i] = int16(weight) + tmpTotal = end + } + } + return nil +} + +// validateNorm validates the normalized histogram table. +func (s *Scratch) validateNorm() (err error) { + var total int + for _, v := range s.norm[:s.symbolLen] { + if v >= 0 { + total += int(v) + } else { + total -= int(v) + } + } + defer func() { + if err == nil { + return + } + fmt.Printf("selected TableLog: %d, Symbol length: %d\n", s.actualTableLog, s.symbolLen) + for i, v := range s.norm[:s.symbolLen] { + fmt.Printf("%3d: %5d -> %4d \n", i, s.count[i], v) + } + }() + if total != (1 << s.actualTableLog) { + return fmt.Errorf("warning: Total == %d != %d", total, 1< tablelogAbsoluteMax { + return errors.New("tableLog too large") + } + bitStream >>= 4 + bitCount := uint(4) + + s.actualTableLog = uint8(nbBits) + remaining := int32((1 << nbBits) + 1) + threshold := int32(1 << nbBits) + gotTotal := int32(0) + nbBits++ + + for remaining > 1 { + if previous0 { + n0 := charnum + for (bitStream & 0xFFFF) == 0xFFFF { + n0 += 24 + if b.off < iend-5 { + b.advance(2) + bitStream = b.Uint32() >> bitCount + } else { + bitStream >>= 16 + bitCount += 16 + } + } + for (bitStream & 3) == 3 { + n0 += 3 + bitStream >>= 2 + bitCount += 2 + } + n0 += uint16(bitStream & 3) + bitCount += 2 + if n0 > maxSymbolValue { + return errors.New("maxSymbolValue too small") + } + for charnum < n0 { + s.norm[charnum&0xff] = 0 + charnum++ + } + + if b.off <= iend-7 || b.off+int(bitCount>>3) <= iend-4 { + b.advance(bitCount >> 3) + bitCount &= 7 + bitStream = b.Uint32() >> bitCount + } else { + bitStream >>= 2 + } + } + + max := (2*(threshold) - 1) - (remaining) + var count int32 + + if (int32(bitStream) & (threshold - 1)) < max { + count = int32(bitStream) & (threshold - 1) + bitCount += nbBits - 1 + } else { + count = int32(bitStream) & (2*threshold - 1) + if count >= threshold { + count -= max + } + bitCount += nbBits + } + + count-- // extra accuracy + if count < 0 { + // -1 means +1 + remaining += count + gotTotal -= count + } else { + remaining -= count + gotTotal += count + } + s.norm[charnum&0xff] = int16(count) + charnum++ + previous0 = count == 0 + for remaining < threshold { + nbBits-- + threshold >>= 1 + } + if b.off <= iend-7 || b.off+int(bitCount>>3) <= iend-4 { + b.advance(bitCount >> 3) + bitCount &= 7 + } else { + bitCount -= (uint)(8 * (len(b.b) - 4 - b.off)) + b.off = len(b.b) - 4 + } + bitStream = b.Uint32() >> (bitCount & 31) + } + s.symbolLen = charnum + + if s.symbolLen <= 1 { + return fmt.Errorf("symbolLen (%d) too small", s.symbolLen) + } + if s.symbolLen > maxSymbolValue+1 { + return fmt.Errorf("symbolLen (%d) too big", s.symbolLen) + } + if remaining != 1 { + return fmt.Errorf("corruption detected (remaining %d != 1)", remaining) + } + if bitCount > 32 { + return fmt.Errorf("corruption detected (bitCount %d > 32)", bitCount) + } + if gotTotal != 1<> 3) + return nil +} + +// decSymbol contains information about a state entry, +// Including the state offset base, the output symbol and +// the number of bits to read for the low part of the destination state. +type decSymbol struct { + newState uint16 + symbol uint8 + nbBits uint8 +} + +// allocDtable will allocate decoding tables if they are not big enough. +func (s *Scratch) allocDtable() { + tableSize := 1 << s.actualTableLog + if cap(s.decTable) < tableSize { + s.decTable = make([]decSymbol, tableSize) + } + s.decTable = s.decTable[:tableSize] + + if cap(s.ct.tableSymbol) < 256 { + s.ct.tableSymbol = make([]byte, 256) + } + s.ct.tableSymbol = s.ct.tableSymbol[:256] + + if cap(s.ct.stateTable) < 256 { + s.ct.stateTable = make([]uint16, 256) + } + s.ct.stateTable = s.ct.stateTable[:256] +} + +// buildDtable will build the decoding table. +func (s *Scratch) buildDtable() error { + tableSize := uint32(1 << s.actualTableLog) + highThreshold := tableSize - 1 + s.allocDtable() + symbolNext := s.ct.stateTable[:256] + + // Init, lay down lowprob symbols + s.zeroBits = false + { + largeLimit := int16(1 << (s.actualTableLog - 1)) + for i, v := range s.norm[:s.symbolLen] { + if v == -1 { + s.decTable[highThreshold].symbol = uint8(i) + highThreshold-- + symbolNext[i] = 1 + } else { + if v >= largeLimit { + s.zeroBits = true + } + symbolNext[i] = uint16(v) + } + } + } + // Spread symbols + { + tableMask := tableSize - 1 + step := tableStep(tableSize) + position := uint32(0) + for ss, v := range s.norm[:s.symbolLen] { + for i := 0; i < int(v); i++ { + s.decTable[position].symbol = uint8(ss) + position = (position + step) & tableMask + for position > highThreshold { + // lowprob area + position = (position + step) & tableMask + } + } + } + if position != 0 { + // position must reach all cells once, otherwise normalizedCounter is incorrect + return errors.New("corrupted input (position != 0)") + } + } + + // Build Decoding table + { + tableSize := uint16(1 << s.actualTableLog) + for u, v := range s.decTable { + symbol := v.symbol + nextState := symbolNext[symbol] + symbolNext[symbol] = nextState + 1 + nBits := s.actualTableLog - byte(highBits(uint32(nextState))) + s.decTable[u].nbBits = nBits + newState := (nextState << nBits) - tableSize + if newState >= tableSize { + return fmt.Errorf("newState (%d) outside table size (%d)", newState, tableSize) + } + if newState == uint16(u) && nBits == 0 { + // Seems weird that this is possible with nbits > 0. + return fmt.Errorf("newState (%d) == oldState (%d) and no bits", newState, u) + } + s.decTable[u].newState = newState + } + } + return nil +} + +// decompress will decompress the bitstream. +// If the buffer is over-read an error is returned. +func (s *Scratch) decompress() error { + br := &s.bits + if err := br.init(s.br.unread()); err != nil { + return err + } + + var s1, s2 decoder + // Initialize and decode first state and symbol. + s1.init(br, s.decTable, s.actualTableLog) + s2.init(br, s.decTable, s.actualTableLog) + + // Use temp table to avoid bound checks/append penalty. + var tmp = s.ct.tableSymbol[:256] + var off uint8 + + // Main part + if !s.zeroBits { + for br.off >= 8 { + br.fillFast() + tmp[off+0] = s1.nextFast() + tmp[off+1] = s2.nextFast() + br.fillFast() + tmp[off+2] = s1.nextFast() + tmp[off+3] = s2.nextFast() + off += 4 + // When off is 0, we have overflowed and should write. + if off == 0 { + s.Out = append(s.Out, tmp...) + if len(s.Out) >= s.DecompressLimit { + return fmt.Errorf("output size (%d) > DecompressLimit (%d)", len(s.Out), s.DecompressLimit) + } + } + } + } else { + for br.off >= 8 { + br.fillFast() + tmp[off+0] = s1.next() + tmp[off+1] = s2.next() + br.fillFast() + tmp[off+2] = s1.next() + tmp[off+3] = s2.next() + off += 4 + if off == 0 { + s.Out = append(s.Out, tmp...) + // When off is 0, we have overflowed and should write. + if len(s.Out) >= s.DecompressLimit { + return fmt.Errorf("output size (%d) > DecompressLimit (%d)", len(s.Out), s.DecompressLimit) + } + } + } + } + s.Out = append(s.Out, tmp[:off]...) + + // Final bits, a bit more expensive check + for { + if s1.finished() { + s.Out = append(s.Out, s1.final(), s2.final()) + break + } + br.fill() + s.Out = append(s.Out, s1.next()) + if s2.finished() { + s.Out = append(s.Out, s2.final(), s1.final()) + break + } + s.Out = append(s.Out, s2.next()) + if len(s.Out) >= s.DecompressLimit { + return fmt.Errorf("output size (%d) > DecompressLimit (%d)", len(s.Out), s.DecompressLimit) + } + } + return br.close() +} + +// decoder keeps track of the current state and updates it from the bitstream. +type decoder struct { + state uint16 + br *bitReader + dt []decSymbol +} + +// init will initialize the decoder and read the first state from the stream. +func (d *decoder) init(in *bitReader, dt []decSymbol, tableLog uint8) { + d.dt = dt + d.br = in + d.state = in.getBits(tableLog) +} + +// next returns the next symbol and sets the next state. +// At least tablelog bits must be available in the bit reader. +func (d *decoder) next() uint8 { + n := &d.dt[d.state] + lowBits := d.br.getBits(n.nbBits) + d.state = n.newState + lowBits + return n.symbol +} + +// finished returns true if all bits have been read from the bitstream +// and the next state would require reading bits from the input. +func (d *decoder) finished() bool { + return d.br.finished() && d.dt[d.state].nbBits > 0 +} + +// final returns the current state symbol without decoding the next. +func (d *decoder) final() uint8 { + return d.dt[d.state].symbol +} + +// nextFast returns the next symbol and sets the next state. +// This can only be used if no symbols are 0 bits. +// At least tablelog bits must be available in the bit reader. +func (d *decoder) nextFast() uint8 { + n := d.dt[d.state] + lowBits := d.br.getBitsFast(n.nbBits) + d.state = n.newState + lowBits + return n.symbol +} diff --git a/backend/vendor/github.com/klauspost/compress/fse/fse.go b/backend/vendor/github.com/klauspost/compress/fse/fse.go new file mode 100644 index 0000000..535cbad --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/fse/fse.go @@ -0,0 +1,144 @@ +// Copyright 2018 Klaus Post. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. +// Based on work Copyright (c) 2013, Yann Collet, released under BSD License. + +// Package fse provides Finite State Entropy encoding and decoding. +// +// Finite State Entropy encoding provides a fast near-optimal symbol encoding/decoding +// for byte blocks as implemented in zstd. +// +// See https://github.com/klauspost/compress/tree/master/fse for more information. +package fse + +import ( + "errors" + "fmt" + "math/bits" +) + +const ( + /*!MEMORY_USAGE : + * Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.) + * Increasing memory usage improves compression ratio + * Reduced memory usage can improve speed, due to cache effect + * Recommended max value is 14, for 16KB, which nicely fits into Intel x86 L1 cache */ + maxMemoryUsage = 14 + defaultMemoryUsage = 13 + + maxTableLog = maxMemoryUsage - 2 + maxTablesize = 1 << maxTableLog + defaultTablelog = defaultMemoryUsage - 2 + minTablelog = 5 + maxSymbolValue = 255 +) + +var ( + // ErrIncompressible is returned when input is judged to be too hard to compress. + ErrIncompressible = errors.New("input is not compressible") + + // ErrUseRLE is returned from the compressor when the input is a single byte value repeated. + ErrUseRLE = errors.New("input is single value repeated") +) + +// Scratch provides temporary storage for compression and decompression. +type Scratch struct { + // Private + count [maxSymbolValue + 1]uint32 + norm [maxSymbolValue + 1]int16 + br byteReader + bits bitReader + bw bitWriter + ct cTable // Compression tables. + decTable []decSymbol // Decompression table. + maxCount int // count of the most probable symbol + + // Per block parameters. + // These can be used to override compression parameters of the block. + // Do not touch, unless you know what you are doing. + + // Out is output buffer. + // If the scratch is re-used before the caller is done processing the output, + // set this field to nil. + // Otherwise the output buffer will be re-used for next Compression/Decompression step + // and allocation will be avoided. + Out []byte + + // DecompressLimit limits the maximum decoded size acceptable. + // If > 0 decompression will stop when approximately this many bytes + // has been decoded. + // If 0, maximum size will be 2GB. + DecompressLimit int + + symbolLen uint16 // Length of active part of the symbol table. + actualTableLog uint8 // Selected tablelog. + zeroBits bool // no bits has prob > 50%. + clearCount bool // clear count + + // MaxSymbolValue will override the maximum symbol value of the next block. + MaxSymbolValue uint8 + + // TableLog will attempt to override the tablelog for the next block. + TableLog uint8 +} + +// Histogram allows to populate the histogram and skip that step in the compression, +// It otherwise allows to inspect the histogram when compression is done. +// To indicate that you have populated the histogram call HistogramFinished +// with the value of the highest populated symbol, as well as the number of entries +// in the most populated entry. These are accepted at face value. +// The returned slice will always be length 256. +func (s *Scratch) Histogram() []uint32 { + return s.count[:] +} + +// HistogramFinished can be called to indicate that the histogram has been populated. +// maxSymbol is the index of the highest set symbol of the next data segment. +// maxCount is the number of entries in the most populated entry. +// These are accepted at face value. +func (s *Scratch) HistogramFinished(maxSymbol uint8, maxCount int) { + s.maxCount = maxCount + s.symbolLen = uint16(maxSymbol) + 1 + s.clearCount = maxCount != 0 +} + +// prepare will prepare and allocate scratch tables used for both compression and decompression. +func (s *Scratch) prepare(in []byte) (*Scratch, error) { + if s == nil { + s = &Scratch{} + } + if s.MaxSymbolValue == 0 { + s.MaxSymbolValue = 255 + } + if s.TableLog == 0 { + s.TableLog = defaultTablelog + } + if s.TableLog > maxTableLog { + return nil, fmt.Errorf("tableLog (%d) > maxTableLog (%d)", s.TableLog, maxTableLog) + } + if cap(s.Out) == 0 { + s.Out = make([]byte, 0, len(in)) + } + if s.clearCount && s.maxCount == 0 { + for i := range s.count { + s.count[i] = 0 + } + s.clearCount = false + } + s.br.init(in) + if s.DecompressLimit == 0 { + // Max size 2GB. + s.DecompressLimit = (2 << 30) - 1 + } + + return s, nil +} + +// tableStep returns the next table index. +func tableStep(tableSize uint32) uint32 { + return (tableSize >> 1) + (tableSize >> 3) + 3 +} + +func highBits(val uint32) (n uint32) { + return uint32(bits.Len32(val) - 1) +} diff --git a/backend/vendor/github.com/klauspost/compress/gen.sh b/backend/vendor/github.com/klauspost/compress/gen.sh new file mode 100644 index 0000000..aff9422 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/gen.sh @@ -0,0 +1,4 @@ +#!/bin/sh + +cd s2/cmd/_s2sx/ || exit 1 +go generate . diff --git a/backend/vendor/github.com/klauspost/compress/huff0/.gitignore b/backend/vendor/github.com/klauspost/compress/huff0/.gitignore new file mode 100644 index 0000000..b3d2629 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/huff0/.gitignore @@ -0,0 +1 @@ +/huff0-fuzz.zip diff --git a/backend/vendor/github.com/klauspost/compress/huff0/README.md b/backend/vendor/github.com/klauspost/compress/huff0/README.md new file mode 100644 index 0000000..8b6e5c6 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/huff0/README.md @@ -0,0 +1,89 @@ +# Huff0 entropy compression + +This package provides Huff0 encoding and decoding as used in zstd. + +[Huff0](https://github.com/Cyan4973/FiniteStateEntropy#new-generation-entropy-coders), +a Huffman codec designed for modern CPU, featuring OoO (Out of Order) operations on multiple ALU +(Arithmetic Logic Unit), achieving extremely fast compression and decompression speeds. + +This can be used for compressing input with a lot of similar input values to the smallest number of bytes. +This does not perform any multi-byte [dictionary coding](https://en.wikipedia.org/wiki/Dictionary_coder) as LZ coders, +but it can be used as a secondary step to compressors (like Snappy) that does not do entropy encoding. + +* [Godoc documentation](https://godoc.org/github.com/klauspost/compress/huff0) + +## News + +This is used as part of the [zstandard](https://github.com/klauspost/compress/tree/master/zstd#zstd) compression and decompression package. + +This ensures that most functionality is well tested. + +# Usage + +This package provides a low level interface that allows to compress single independent blocks. + +Each block is separate, and there is no built in integrity checks. +This means that the caller should keep track of block sizes and also do checksums if needed. + +Compressing a block is done via the [`Compress1X`](https://godoc.org/github.com/klauspost/compress/huff0#Compress1X) and +[`Compress4X`](https://godoc.org/github.com/klauspost/compress/huff0#Compress4X) functions. +You must provide input and will receive the output and maybe an error. + +These error values can be returned: + +| Error | Description | +|---------------------|-----------------------------------------------------------------------------| +| `` | Everything ok, output is returned | +| `ErrIncompressible` | Returned when input is judged to be too hard to compress | +| `ErrUseRLE` | Returned from the compressor when the input is a single byte value repeated | +| `ErrTooBig` | Returned if the input block exceeds the maximum allowed size (128 Kib) | +| `(error)` | An internal error occurred. | + + +As can be seen above some of there are errors that will be returned even under normal operation so it is important to handle these. + +To reduce allocations you can provide a [`Scratch`](https://godoc.org/github.com/klauspost/compress/huff0#Scratch) object +that can be re-used for successive calls. Both compression and decompression accepts a `Scratch` object, and the same +object can be used for both. + +Be aware, that when re-using a `Scratch` object that the *output* buffer is also re-used, so if you are still using this +you must set the `Out` field in the scratch to nil. The same buffer is used for compression and decompression output. + +The `Scratch` object will retain state that allows to re-use previous tables for encoding and decoding. + +## Tables and re-use + +Huff0 allows for reusing tables from the previous block to save space if that is expected to give better/faster results. + +The Scratch object allows you to set a [`ReusePolicy`](https://godoc.org/github.com/klauspost/compress/huff0#ReusePolicy) +that controls this behaviour. See the documentation for details. This can be altered between each block. + +Do however note that this information is *not* stored in the output block and it is up to the users of the package to +record whether [`ReadTable`](https://godoc.org/github.com/klauspost/compress/huff0#ReadTable) should be called, +based on the boolean reported back from the CompressXX call. + +If you want to store the table separate from the data, you can access them as `OutData` and `OutTable` on the +[`Scratch`](https://godoc.org/github.com/klauspost/compress/huff0#Scratch) object. + +## Decompressing + +The first part of decoding is to initialize the decoding table through [`ReadTable`](https://godoc.org/github.com/klauspost/compress/huff0#ReadTable). +This will initialize the decoding tables. +You can supply the complete block to `ReadTable` and it will return the data part of the block +which can be given to the decompressor. + +Decompressing is done by calling the [`Decompress1X`](https://godoc.org/github.com/klauspost/compress/huff0#Scratch.Decompress1X) +or [`Decompress4X`](https://godoc.org/github.com/klauspost/compress/huff0#Scratch.Decompress4X) function. + +For concurrently decompressing content with a fixed table a stateless [`Decoder`](https://godoc.org/github.com/klauspost/compress/huff0#Decoder) can be requested which will remain correct as long as the scratch is unchanged. The capacity of the provided slice indicates the expected output size. + +You must provide the output from the compression stage, at exactly the size you got back. If you receive an error back +your input was likely corrupted. + +It is important to note that a successful decoding does *not* mean your output matches your original input. +There are no integrity checks, so relying on errors from the decompressor does not assure your data is valid. + +# Contributing + +Contributions are always welcome. Be aware that adding public functions will require good justification and breaking +changes will likely not be accepted. If in doubt open an issue before writing the PR. diff --git a/backend/vendor/github.com/klauspost/compress/huff0/bitreader.go b/backend/vendor/github.com/klauspost/compress/huff0/bitreader.go new file mode 100644 index 0000000..bfc7a52 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/huff0/bitreader.go @@ -0,0 +1,224 @@ +// Copyright 2018 Klaus Post. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. +// Based on work Copyright (c) 2013, Yann Collet, released under BSD License. + +package huff0 + +import ( + "errors" + "fmt" + "io" + + "github.com/klauspost/compress/internal/le" +) + +// bitReader reads a bitstream in reverse. +// The last set bit indicates the start of the stream and is used +// for aligning the input. +type bitReaderBytes struct { + in []byte + off uint // next byte to read is at in[off - 1] + value uint64 + bitsRead uint8 +} + +// init initializes and resets the bit reader. +func (b *bitReaderBytes) init(in []byte) error { + if len(in) < 1 { + return errors.New("corrupt stream: too short") + } + b.in = in + b.off = uint(len(in)) + // The highest bit of the last byte indicates where to start + v := in[len(in)-1] + if v == 0 { + return errors.New("corrupt stream, did not find end of stream") + } + b.bitsRead = 64 + b.value = 0 + if len(in) >= 8 { + b.fillFastStart() + } else { + b.fill() + b.fill() + } + b.advance(8 - uint8(highBit32(uint32(v)))) + return nil +} + +// peekByteFast requires that at least one byte is requested every time. +// There are no checks if the buffer is filled. +func (b *bitReaderBytes) peekByteFast() uint8 { + got := uint8(b.value >> 56) + return got +} + +func (b *bitReaderBytes) advance(n uint8) { + b.bitsRead += n + b.value <<= n & 63 +} + +// fillFast() will make sure at least 32 bits are available. +// There must be at least 4 bytes available. +func (b *bitReaderBytes) fillFast() { + if b.bitsRead < 32 { + return + } + + // 2 bounds checks. + low := le.Load32(b.in, b.off-4) + b.value |= uint64(low) << (b.bitsRead - 32) + b.bitsRead -= 32 + b.off -= 4 +} + +// fillFastStart() assumes the bitReaderBytes is empty and there is at least 8 bytes to read. +func (b *bitReaderBytes) fillFastStart() { + // Do single re-slice to avoid bounds checks. + b.value = le.Load64(b.in, b.off-8) + b.bitsRead = 0 + b.off -= 8 +} + +// fill() will make sure at least 32 bits are available. +func (b *bitReaderBytes) fill() { + if b.bitsRead < 32 { + return + } + if b.off >= 4 { + low := le.Load32(b.in, b.off-4) + b.value |= uint64(low) << (b.bitsRead - 32) + b.bitsRead -= 32 + b.off -= 4 + return + } + for b.off > 0 { + b.value |= uint64(b.in[b.off-1]) << (b.bitsRead - 8) + b.bitsRead -= 8 + b.off-- + } +} + +// finished returns true if all bits have been read from the bit stream. +func (b *bitReaderBytes) finished() bool { + return b.off == 0 && b.bitsRead >= 64 +} + +func (b *bitReaderBytes) remaining() uint { + return b.off*8 + uint(64-b.bitsRead) +} + +// close the bitstream and returns an error if out-of-buffer reads occurred. +func (b *bitReaderBytes) close() error { + // Release reference. + b.in = nil + if b.remaining() > 0 { + return fmt.Errorf("corrupt input: %d bits remain on stream", b.remaining()) + } + if b.bitsRead > 64 { + return io.ErrUnexpectedEOF + } + return nil +} + +// bitReaderShifted reads a bitstream in reverse. +// The last set bit indicates the start of the stream and is used +// for aligning the input. +type bitReaderShifted struct { + in []byte + off uint // next byte to read is at in[off - 1] + value uint64 + bitsRead uint8 +} + +// init initializes and resets the bit reader. +func (b *bitReaderShifted) init(in []byte) error { + if len(in) < 1 { + return errors.New("corrupt stream: too short") + } + b.in = in + b.off = uint(len(in)) + // The highest bit of the last byte indicates where to start + v := in[len(in)-1] + if v == 0 { + return errors.New("corrupt stream, did not find end of stream") + } + b.bitsRead = 64 + b.value = 0 + if len(in) >= 8 { + b.fillFastStart() + } else { + b.fill() + b.fill() + } + b.advance(8 - uint8(highBit32(uint32(v)))) + return nil +} + +// peekBitsFast requires that at least one bit is requested every time. +// There are no checks if the buffer is filled. +func (b *bitReaderShifted) peekBitsFast(n uint8) uint16 { + return uint16(b.value >> ((64 - n) & 63)) +} + +func (b *bitReaderShifted) advance(n uint8) { + b.bitsRead += n + b.value <<= n & 63 +} + +// fillFast() will make sure at least 32 bits are available. +// There must be at least 4 bytes available. +func (b *bitReaderShifted) fillFast() { + if b.bitsRead < 32 { + return + } + + low := le.Load32(b.in, b.off-4) + b.value |= uint64(low) << ((b.bitsRead - 32) & 63) + b.bitsRead -= 32 + b.off -= 4 +} + +// fillFastStart() assumes the bitReaderShifted is empty and there is at least 8 bytes to read. +func (b *bitReaderShifted) fillFastStart() { + b.value = le.Load64(b.in, b.off-8) + b.bitsRead = 0 + b.off -= 8 +} + +// fill() will make sure at least 32 bits are available. +func (b *bitReaderShifted) fill() { + if b.bitsRead < 32 { + return + } + if b.off > 4 { + low := le.Load32(b.in, b.off-4) + b.value |= uint64(low) << ((b.bitsRead - 32) & 63) + b.bitsRead -= 32 + b.off -= 4 + return + } + for b.off > 0 { + b.value |= uint64(b.in[b.off-1]) << ((b.bitsRead - 8) & 63) + b.bitsRead -= 8 + b.off-- + } +} + +func (b *bitReaderShifted) remaining() uint { + return b.off*8 + uint(64-b.bitsRead) +} + +// close the bitstream and returns an error if out-of-buffer reads occurred. +func (b *bitReaderShifted) close() error { + // Release reference. + b.in = nil + if b.remaining() > 0 { + return fmt.Errorf("corrupt input: %d bits remain on stream", b.remaining()) + } + if b.bitsRead > 64 { + return io.ErrUnexpectedEOF + } + return nil +} diff --git a/backend/vendor/github.com/klauspost/compress/huff0/bitwriter.go b/backend/vendor/github.com/klauspost/compress/huff0/bitwriter.go new file mode 100644 index 0000000..41db94c --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/huff0/bitwriter.go @@ -0,0 +1,102 @@ +// Copyright 2018 Klaus Post. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. +// Based on work Copyright (c) 2013, Yann Collet, released under BSD License. + +package huff0 + +// bitWriter will write bits. +// First bit will be LSB of the first byte of output. +type bitWriter struct { + bitContainer uint64 + nBits uint8 + out []byte +} + +// addBits16Clean will add up to 16 bits. value may not contain more set bits than indicated. +// It will not check if there is space for them, so the caller must ensure that it has flushed recently. +func (b *bitWriter) addBits16Clean(value uint16, bits uint8) { + b.bitContainer |= uint64(value) << (b.nBits & 63) + b.nBits += bits +} + +// encSymbol will add up to 16 bits. value may not contain more set bits than indicated. +// It will not check if there is space for them, so the caller must ensure that it has flushed recently. +func (b *bitWriter) encSymbol(ct cTable, symbol byte) { + enc := ct[symbol] + b.bitContainer |= uint64(enc.val) << (b.nBits & 63) + if false { + if enc.nBits == 0 { + panic("nbits 0") + } + } + b.nBits += enc.nBits +} + +// encTwoSymbols will add up to 32 bits. value may not contain more set bits than indicated. +// It will not check if there is space for them, so the caller must ensure that it has flushed recently. +func (b *bitWriter) encTwoSymbols(ct cTable, av, bv byte) { + encA := ct[av] + encB := ct[bv] + sh := b.nBits & 63 + combined := uint64(encA.val) | (uint64(encB.val) << (encA.nBits & 63)) + b.bitContainer |= combined << sh + if false { + if encA.nBits == 0 { + panic("nbitsA 0") + } + if encB.nBits == 0 { + panic("nbitsB 0") + } + } + b.nBits += encA.nBits + encB.nBits +} + +// encFourSymbols adds up to 32 bits from four symbols. +// It will not check if there is space for them, +// so the caller must ensure that b has been flushed recently. +func (b *bitWriter) encFourSymbols(encA, encB, encC, encD cTableEntry) { + bitsA := encA.nBits + bitsB := bitsA + encB.nBits + bitsC := bitsB + encC.nBits + bitsD := bitsC + encD.nBits + combined := uint64(encA.val) | + (uint64(encB.val) << (bitsA & 63)) | + (uint64(encC.val) << (bitsB & 63)) | + (uint64(encD.val) << (bitsC & 63)) + b.bitContainer |= combined << (b.nBits & 63) + b.nBits += bitsD +} + +// flush32 will flush out, so there are at least 32 bits available for writing. +func (b *bitWriter) flush32() { + if b.nBits < 32 { + return + } + b.out = append(b.out, + byte(b.bitContainer), + byte(b.bitContainer>>8), + byte(b.bitContainer>>16), + byte(b.bitContainer>>24)) + b.nBits -= 32 + b.bitContainer >>= 32 +} + +// flushAlign will flush remaining full bytes and align to next byte boundary. +func (b *bitWriter) flushAlign() { + nbBytes := (b.nBits + 7) >> 3 + for i := range nbBytes { + b.out = append(b.out, byte(b.bitContainer>>(i*8))) + } + b.nBits = 0 + b.bitContainer = 0 +} + +// close will write the alignment bit and write the final byte(s) +// to the output. +func (b *bitWriter) close() { + // End mark + b.addBits16Clean(1, 1) + // flush until next byte. + b.flushAlign() +} diff --git a/backend/vendor/github.com/klauspost/compress/huff0/compress.go b/backend/vendor/github.com/klauspost/compress/huff0/compress.go new file mode 100644 index 0000000..a97cf1b --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/huff0/compress.go @@ -0,0 +1,742 @@ +package huff0 + +import ( + "fmt" + "math" + "runtime" + "sync" +) + +// Compress1X will compress the input. +// The output can be decoded using Decompress1X. +// Supply a Scratch object. The scratch object contains state about re-use, +// So when sharing across independent encodes, be sure to set the re-use policy. +func Compress1X(in []byte, s *Scratch) (out []byte, reUsed bool, err error) { + s, err = s.prepare(in) + if err != nil { + return nil, false, err + } + return compress(in, s, s.compress1X) +} + +// Compress4X will compress the input. The input is split into 4 independent blocks +// and compressed similar to Compress1X. +// The output can be decoded using Decompress4X. +// Supply a Scratch object. The scratch object contains state about re-use, +// So when sharing across independent encodes, be sure to set the re-use policy. +func Compress4X(in []byte, s *Scratch) (out []byte, reUsed bool, err error) { + s, err = s.prepare(in) + if err != nil { + return nil, false, err + } + if false { + // TODO: compress4Xp only slightly faster. + const parallelThreshold = 8 << 10 + if len(in) < parallelThreshold || runtime.GOMAXPROCS(0) == 1 { + return compress(in, s, s.compress4X) + } + return compress(in, s, s.compress4Xp) + } + return compress(in, s, s.compress4X) +} + +func compress(in []byte, s *Scratch, compressor func(src []byte) ([]byte, error)) (out []byte, reUsed bool, err error) { + // Nuke previous table if we cannot reuse anyway. + if s.Reuse == ReusePolicyNone { + s.prevTable = s.prevTable[:0] + } + + // Create histogram, if none was provided. + maxCount := s.maxCount + var canReuse = false + if maxCount == 0 { + maxCount, canReuse = s.countSimple(in) + } else { + canReuse = s.canUseTable(s.prevTable) + } + + // We want the output size to be less than this: + wantSize := len(in) + if s.WantLogLess > 0 { + wantSize -= wantSize >> s.WantLogLess + } + + // Reset for next run. + s.clearCount = true + s.maxCount = 0 + if maxCount >= len(in) { + if maxCount > len(in) { + return nil, false, fmt.Errorf("maxCount (%d) > length (%d)", maxCount, len(in)) + } + if len(in) == 1 { + return nil, false, ErrIncompressible + } + // One symbol, use RLE + return nil, false, ErrUseRLE + } + if maxCount == 1 || maxCount < (len(in)>>7) { + // Each symbol present maximum once or too well distributed. + return nil, false, ErrIncompressible + } + if s.Reuse == ReusePolicyMust && !canReuse { + // We must reuse, but we can't. + return nil, false, ErrIncompressible + } + if (s.Reuse == ReusePolicyPrefer || s.Reuse == ReusePolicyMust) && canReuse { + keepTable := s.cTable + keepTL := s.actualTableLog + s.cTable = s.prevTable + s.actualTableLog = s.prevTableLog + s.Out, err = compressor(in) + s.cTable = keepTable + s.actualTableLog = keepTL + if err == nil && len(s.Out) < wantSize { + s.OutData = s.Out + return s.Out, true, nil + } + if s.Reuse == ReusePolicyMust { + return nil, false, ErrIncompressible + } + // Do not attempt to re-use later. + s.prevTable = s.prevTable[:0] + } + + // Calculate new table. + err = s.buildCTable() + if err != nil { + return nil, false, err + } + + if false && !s.canUseTable(s.cTable) { + panic("invalid table generated") + } + + if s.Reuse == ReusePolicyAllow && canReuse { + hSize := len(s.Out) + oldSize := s.prevTable.estimateSize(s.count[:s.symbolLen]) + newSize := s.cTable.estimateSize(s.count[:s.symbolLen]) + if oldSize <= hSize+newSize || hSize+12 >= wantSize { + // Retain cTable even if we re-use. + keepTable := s.cTable + keepTL := s.actualTableLog + + s.cTable = s.prevTable + s.actualTableLog = s.prevTableLog + s.Out, err = compressor(in) + + // Restore ctable. + s.cTable = keepTable + s.actualTableLog = keepTL + if err != nil { + return nil, false, err + } + if len(s.Out) >= wantSize { + return nil, false, ErrIncompressible + } + s.OutData = s.Out + return s.Out, true, nil + } + } + + // Use new table + err = s.cTable.write(s) + if err != nil { + s.OutTable = nil + return nil, false, err + } + s.OutTable = s.Out + + // Compress using new table + s.Out, err = compressor(in) + if err != nil { + s.OutTable = nil + return nil, false, err + } + if len(s.Out) >= wantSize { + s.OutTable = nil + return nil, false, ErrIncompressible + } + // Move current table into previous. + s.prevTable, s.prevTableLog, s.cTable = s.cTable, s.actualTableLog, s.prevTable[:0] + s.OutData = s.Out[len(s.OutTable):] + return s.Out, false, nil +} + +// EstimateSizes will estimate the data sizes +func EstimateSizes(in []byte, s *Scratch) (tableSz, dataSz, reuseSz int, err error) { + s, err = s.prepare(in) + if err != nil { + return 0, 0, 0, err + } + + // Create histogram, if none was provided. + tableSz, dataSz, reuseSz = -1, -1, -1 + maxCount := s.maxCount + var canReuse = false + if maxCount == 0 { + maxCount, canReuse = s.countSimple(in) + } else { + canReuse = s.canUseTable(s.prevTable) + } + + // We want the output size to be less than this: + wantSize := len(in) + if s.WantLogLess > 0 { + wantSize -= wantSize >> s.WantLogLess + } + + // Reset for next run. + s.clearCount = true + s.maxCount = 0 + if maxCount >= len(in) { + if maxCount > len(in) { + return 0, 0, 0, fmt.Errorf("maxCount (%d) > length (%d)", maxCount, len(in)) + } + if len(in) == 1 { + return 0, 0, 0, ErrIncompressible + } + // One symbol, use RLE + return 0, 0, 0, ErrUseRLE + } + if maxCount == 1 || maxCount < (len(in)>>7) { + // Each symbol present maximum once or too well distributed. + return 0, 0, 0, ErrIncompressible + } + + // Calculate new table. + err = s.buildCTable() + if err != nil { + return 0, 0, 0, err + } + + if false && !s.canUseTable(s.cTable) { + panic("invalid table generated") + } + + tableSz, err = s.cTable.estTableSize(s) + if err != nil { + return 0, 0, 0, err + } + if canReuse { + reuseSz = s.prevTable.estimateSize(s.count[:s.symbolLen]) + } + dataSz = s.cTable.estimateSize(s.count[:s.symbolLen]) + + // Restore + return tableSz, dataSz, reuseSz, nil +} + +func (s *Scratch) compress1X(src []byte) ([]byte, error) { + return s.compress1xDo(s.Out, src), nil +} + +func (s *Scratch) compress1xDo(dst, src []byte) []byte { + var bw = bitWriter{out: dst} + + // N is length divisible by 4. + n := len(src) + n -= n & 3 + cTable := s.cTable[:256] + + // Encode last bytes. + for i := len(src) & 3; i > 0; i-- { + bw.encSymbol(cTable, src[n+i-1]) + } + n -= 4 + if s.actualTableLog <= 8 { + for ; n >= 0; n -= 4 { + tmp := src[n : n+4] + // tmp should be len 4 + bw.flush32() + bw.encFourSymbols(cTable[tmp[3]], cTable[tmp[2]], cTable[tmp[1]], cTable[tmp[0]]) + } + } else { + for ; n >= 0; n -= 4 { + tmp := src[n : n+4] + // tmp should be len 4 + bw.flush32() + bw.encTwoSymbols(cTable, tmp[3], tmp[2]) + bw.flush32() + bw.encTwoSymbols(cTable, tmp[1], tmp[0]) + } + } + bw.close() + return bw.out +} + +var sixZeros [6]byte + +func (s *Scratch) compress4X(src []byte) ([]byte, error) { + if len(src) < 12 { + return nil, ErrIncompressible + } + segmentSize := (len(src) + 3) / 4 + + // Add placeholder for output length + offsetIdx := len(s.Out) + s.Out = append(s.Out, sixZeros[:]...) + + for i := range 4 { + toDo := src + if len(toDo) > segmentSize { + toDo = toDo[:segmentSize] + } + src = src[len(toDo):] + + idx := len(s.Out) + s.Out = s.compress1xDo(s.Out, toDo) + if len(s.Out)-idx > math.MaxUint16 { + // We cannot store the size in the jump table + return nil, ErrIncompressible + } + // Write compressed length as little endian before block. + if i < 3 { + // Last length is not written. + length := len(s.Out) - idx + s.Out[i*2+offsetIdx] = byte(length) + s.Out[i*2+offsetIdx+1] = byte(length >> 8) + } + } + + return s.Out, nil +} + +// compress4Xp will compress 4 streams using separate goroutines. +func (s *Scratch) compress4Xp(src []byte) ([]byte, error) { + if len(src) < 12 { + return nil, ErrIncompressible + } + // Add placeholder for output length + s.Out = s.Out[:6] + + segmentSize := (len(src) + 3) / 4 + var wg sync.WaitGroup + wg.Add(4) + for i := range 4 { + toDo := src + if len(toDo) > segmentSize { + toDo = toDo[:segmentSize] + } + src = src[len(toDo):] + + // Separate goroutine for each block. + go func(i int) { + s.tmpOut[i] = s.compress1xDo(s.tmpOut[i][:0], toDo) + wg.Done() + }(i) + } + wg.Wait() + for i := range 4 { + o := s.tmpOut[i] + if len(o) > math.MaxUint16 { + // We cannot store the size in the jump table + return nil, ErrIncompressible + } + // Write compressed length as little endian before block. + if i < 3 { + // Last length is not written. + s.Out[i*2] = byte(len(o)) + s.Out[i*2+1] = byte(len(o) >> 8) + } + + // Write output. + s.Out = append(s.Out, o...) + } + return s.Out, nil +} + +// countSimple will create a simple histogram in s.count. +// Returns the biggest count. +// Does not update s.clearCount. +func (s *Scratch) countSimple(in []byte) (max int, reuse bool) { + reuse = true + _ = s.count // Assert that s != nil to speed up the following loop. + for _, v := range in { + s.count[v]++ + } + m := uint32(0) + if len(s.prevTable) > 0 { + for i, v := range s.count[:] { + if v == 0 { + continue + } + if v > m { + m = v + } + s.symbolLen = uint16(i) + 1 + if i >= len(s.prevTable) { + reuse = false + } else if s.prevTable[i].nBits == 0 { + reuse = false + } + } + return int(m), reuse + } + for i, v := range s.count[:] { + if v == 0 { + continue + } + if v > m { + m = v + } + s.symbolLen = uint16(i) + 1 + } + return int(m), false +} + +func (s *Scratch) canUseTable(c cTable) bool { + if len(c) < int(s.symbolLen) { + return false + } + for i, v := range s.count[:s.symbolLen] { + if v != 0 && c[i].nBits == 0 { + return false + } + } + return true +} + +//lint:ignore U1000 used for debugging +func (s *Scratch) validateTable(c cTable) bool { + if len(c) < int(s.symbolLen) { + return false + } + for i, v := range s.count[:s.symbolLen] { + if v != 0 { + if c[i].nBits == 0 { + return false + } + if c[i].nBits > s.actualTableLog { + return false + } + } + } + return true +} + +// minTableLog provides the minimum logSize to safely represent a distribution. +func (s *Scratch) minTableLog() uint8 { + minBitsSrc := highBit32(uint32(s.srcLen)) + 1 + minBitsSymbols := highBit32(uint32(s.symbolLen-1)) + 2 + if minBitsSrc < minBitsSymbols { + return uint8(minBitsSrc) + } + return uint8(minBitsSymbols) +} + +// optimalTableLog calculates and sets the optimal tableLog in s.actualTableLog +func (s *Scratch) optimalTableLog() { + tableLog := s.TableLog + minBits := s.minTableLog() + maxBitsSrc := uint8(highBit32(uint32(s.srcLen-1))) - 1 + if maxBitsSrc < tableLog { + // Accuracy can be reduced + tableLog = maxBitsSrc + } + if minBits > tableLog { + tableLog = minBits + } + // Need a minimum to safely represent all symbol values + if tableLog < minTablelog { + tableLog = minTablelog + } + if tableLog > tableLogMax { + tableLog = tableLogMax + } + s.actualTableLog = tableLog +} + +type cTableEntry struct { + val uint16 + nBits uint8 + // We have 8 bits extra +} + +const huffNodesMask = huffNodesLen - 1 + +func (s *Scratch) buildCTable() error { + s.optimalTableLog() + s.huffSort() + if cap(s.cTable) < maxSymbolValue+1 { + s.cTable = make([]cTableEntry, s.symbolLen, maxSymbolValue+1) + } else { + s.cTable = s.cTable[:s.symbolLen] + for i := range s.cTable { + s.cTable[i] = cTableEntry{} + } + } + + var startNode = int16(s.symbolLen) + nonNullRank := s.symbolLen - 1 + + nodeNb := startNode + huffNode := s.nodes[1 : huffNodesLen+1] + + // This overlays the slice above, but allows "-1" index lookups. + // Different from reference implementation. + huffNode0 := s.nodes[0 : huffNodesLen+1] + + for huffNode[nonNullRank].count() == 0 { + nonNullRank-- + } + + lowS := int16(nonNullRank) + nodeRoot := nodeNb + lowS - 1 + lowN := nodeNb + huffNode[nodeNb].setCount(huffNode[lowS].count() + huffNode[lowS-1].count()) + huffNode[lowS].setParent(nodeNb) + huffNode[lowS-1].setParent(nodeNb) + nodeNb++ + lowS -= 2 + for n := nodeNb; n <= nodeRoot; n++ { + huffNode[n].setCount(1 << 30) + } + // fake entry, strong barrier + huffNode0[0].setCount(1 << 31) + + // create parents + for nodeNb <= nodeRoot { + var n1, n2 int16 + if huffNode0[lowS+1].count() < huffNode0[lowN+1].count() { + n1 = lowS + lowS-- + } else { + n1 = lowN + lowN++ + } + if huffNode0[lowS+1].count() < huffNode0[lowN+1].count() { + n2 = lowS + lowS-- + } else { + n2 = lowN + lowN++ + } + + huffNode[nodeNb].setCount(huffNode0[n1+1].count() + huffNode0[n2+1].count()) + huffNode0[n1+1].setParent(nodeNb) + huffNode0[n2+1].setParent(nodeNb) + nodeNb++ + } + + // distribute weights (unlimited tree height) + huffNode[nodeRoot].setNbBits(0) + for n := nodeRoot - 1; n >= startNode; n-- { + huffNode[n].setNbBits(huffNode[huffNode[n].parent()].nbBits() + 1) + } + for n := uint16(0); n <= nonNullRank; n++ { + huffNode[n].setNbBits(huffNode[huffNode[n].parent()].nbBits() + 1) + } + s.actualTableLog = s.setMaxHeight(int(nonNullRank)) + maxNbBits := s.actualTableLog + + // fill result into tree (val, nbBits) + if maxNbBits > tableLogMax { + return fmt.Errorf("internal error: maxNbBits (%d) > tableLogMax (%d)", maxNbBits, tableLogMax) + } + var nbPerRank [tableLogMax + 1]uint16 + var valPerRank [16]uint16 + for _, v := range huffNode[:nonNullRank+1] { + nbPerRank[v.nbBits()]++ + } + // determine stating value per rank + { + min := uint16(0) + for n := maxNbBits; n > 0; n-- { + // get starting value within each rank + valPerRank[n] = min + min += nbPerRank[n] + min >>= 1 + } + } + + // push nbBits per symbol, symbol order + for _, v := range huffNode[:nonNullRank+1] { + s.cTable[v.symbol()].nBits = v.nbBits() + } + + // assign value within rank, symbol order + t := s.cTable[:s.symbolLen] + for n, val := range t { + nbits := val.nBits & 15 + v := valPerRank[nbits] + t[n].val = v + valPerRank[nbits] = v + 1 + } + + return nil +} + +// huffSort will sort symbols, decreasing order. +func (s *Scratch) huffSort() { + type rankPos struct { + base uint32 + current uint32 + } + + // Clear nodes + nodes := s.nodes[:huffNodesLen+1] + s.nodes = nodes + nodes = nodes[1 : huffNodesLen+1] + + // Sort into buckets based on length of symbol count. + var rank [32]rankPos + for _, v := range s.count[:s.symbolLen] { + r := highBit32(v+1) & 31 + rank[r].base++ + } + // maxBitLength is log2(BlockSizeMax) + 1 + const maxBitLength = 18 + 1 + for n := maxBitLength; n > 0; n-- { + rank[n-1].base += rank[n].base + } + for n := range rank[:maxBitLength] { + rank[n].current = rank[n].base + } + for n, c := range s.count[:s.symbolLen] { + r := (highBit32(c+1) + 1) & 31 + pos := rank[r].current + rank[r].current++ + prev := nodes[(pos-1)&huffNodesMask] + for pos > rank[r].base && c > prev.count() { + nodes[pos&huffNodesMask] = prev + pos-- + prev = nodes[(pos-1)&huffNodesMask] + } + nodes[pos&huffNodesMask] = makeNodeElt(c, byte(n)) + } +} + +func (s *Scratch) setMaxHeight(lastNonNull int) uint8 { + maxNbBits := s.actualTableLog + huffNode := s.nodes[1 : huffNodesLen+1] + //huffNode = huffNode[: huffNodesLen] + + largestBits := huffNode[lastNonNull].nbBits() + + // early exit : no elt > maxNbBits + if largestBits <= maxNbBits { + return largestBits + } + totalCost := int(0) + baseCost := int(1) << (largestBits - maxNbBits) + n := uint32(lastNonNull) + + for huffNode[n].nbBits() > maxNbBits { + totalCost += baseCost - (1 << (largestBits - huffNode[n].nbBits())) + huffNode[n].setNbBits(maxNbBits) + n-- + } + // n stops at huffNode[n].nbBits <= maxNbBits + + for huffNode[n].nbBits() == maxNbBits { + n-- + } + // n end at index of smallest symbol using < maxNbBits + + // renorm totalCost + totalCost >>= largestBits - maxNbBits /* note : totalCost is necessarily a multiple of baseCost */ + + // repay normalized cost + { + const noSymbol = 0xF0F0F0F0 + var rankLast [tableLogMax + 2]uint32 + + for i := range rankLast[:] { + rankLast[i] = noSymbol + } + + // Get pos of last (smallest) symbol per rank + { + currentNbBits := maxNbBits + for pos := int(n); pos >= 0; pos-- { + if huffNode[pos].nbBits() >= currentNbBits { + continue + } + currentNbBits = huffNode[pos].nbBits() // < maxNbBits + rankLast[maxNbBits-currentNbBits] = uint32(pos) + } + } + + for totalCost > 0 { + nBitsToDecrease := uint8(highBit32(uint32(totalCost))) + 1 + + for ; nBitsToDecrease > 1; nBitsToDecrease-- { + highPos := rankLast[nBitsToDecrease] + lowPos := rankLast[nBitsToDecrease-1] + if highPos == noSymbol { + continue + } + if lowPos == noSymbol { + break + } + highTotal := huffNode[highPos].count() + lowTotal := 2 * huffNode[lowPos].count() + if highTotal <= lowTotal { + break + } + } + // only triggered when no more rank 1 symbol left => find closest one (note : there is necessarily at least one !) + // HUF_MAX_TABLELOG test just to please gcc 5+; but it should not be necessary + // FIXME: try to remove + for (nBitsToDecrease <= tableLogMax) && (rankLast[nBitsToDecrease] == noSymbol) { + nBitsToDecrease++ + } + totalCost -= 1 << (nBitsToDecrease - 1) + if rankLast[nBitsToDecrease-1] == noSymbol { + // this rank is no longer empty + rankLast[nBitsToDecrease-1] = rankLast[nBitsToDecrease] + } + huffNode[rankLast[nBitsToDecrease]].setNbBits(1 + + huffNode[rankLast[nBitsToDecrease]].nbBits()) + if rankLast[nBitsToDecrease] == 0 { + /* special case, reached largest symbol */ + rankLast[nBitsToDecrease] = noSymbol + } else { + rankLast[nBitsToDecrease]-- + if huffNode[rankLast[nBitsToDecrease]].nbBits() != maxNbBits-nBitsToDecrease { + rankLast[nBitsToDecrease] = noSymbol /* this rank is now empty */ + } + } + } + + for totalCost < 0 { /* Sometimes, cost correction overshoot */ + if rankLast[1] == noSymbol { /* special case : no rank 1 symbol (using maxNbBits-1); let's create one from largest rank 0 (using maxNbBits) */ + for huffNode[n].nbBits() == maxNbBits { + n-- + } + huffNode[n+1].setNbBits(huffNode[n+1].nbBits() - 1) + rankLast[1] = n + 1 + totalCost++ + continue + } + huffNode[rankLast[1]+1].setNbBits(huffNode[rankLast[1]+1].nbBits() - 1) + rankLast[1]++ + totalCost++ + } + } + return maxNbBits +} + +// A nodeElt is the fields +// +// count uint32 +// parent uint16 +// symbol byte +// nbBits uint8 +// +// in some order, all squashed into an integer so that the compiler +// always loads and stores entire nodeElts instead of separate fields. +type nodeElt uint64 + +func makeNodeElt(count uint32, symbol byte) nodeElt { + return nodeElt(count) | nodeElt(symbol)<<48 +} + +func (e *nodeElt) count() uint32 { return uint32(*e) } +func (e *nodeElt) parent() uint16 { return uint16(*e >> 32) } +func (e *nodeElt) symbol() byte { return byte(*e >> 48) } +func (e *nodeElt) nbBits() uint8 { return uint8(*e >> 56) } + +func (e *nodeElt) setCount(c uint32) { *e = (*e)&0xffffffff00000000 | nodeElt(c) } +func (e *nodeElt) setParent(p int16) { *e = (*e)&0xffff0000ffffffff | nodeElt(uint16(p))<<32 } +func (e *nodeElt) setNbBits(n uint8) { *e = (*e)&0x00ffffffffffffff | nodeElt(n)<<56 } diff --git a/backend/vendor/github.com/klauspost/compress/huff0/decompress.go b/backend/vendor/github.com/klauspost/compress/huff0/decompress.go new file mode 100644 index 0000000..7d0efa8 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/huff0/decompress.go @@ -0,0 +1,1161 @@ +package huff0 + +import ( + "errors" + "fmt" + "io" + "sync" + + "github.com/klauspost/compress/fse" +) + +type dTable struct { + single []dEntrySingle +} + +// single-symbols decoding +type dEntrySingle struct { + entry uint16 +} + +// Uses special code for all tables that are < 8 bits. +const use8BitTables = true + +// ReadTable will read a table from the input. +// The size of the input may be larger than the table definition. +// Any content remaining after the table definition will be returned. +// If no Scratch is provided a new one is allocated. +// The returned Scratch can be used for encoding or decoding input using this table. +func ReadTable(in []byte, s *Scratch) (s2 *Scratch, remain []byte, err error) { + s, err = s.prepare(nil) + if err != nil { + return s, nil, err + } + if len(in) <= 1 { + return s, nil, errors.New("input too small for table") + } + iSize := in[0] + in = in[1:] + if iSize >= 128 { + // Uncompressed + oSize := iSize - 127 + iSize = (oSize + 1) / 2 + if int(iSize) > len(in) { + return s, nil, errors.New("input too small for table") + } + for n := uint8(0); n < oSize; n += 2 { + v := in[n/2] + s.huffWeight[n] = v >> 4 + s.huffWeight[n+1] = v & 15 + } + s.symbolLen = uint16(oSize) + in = in[iSize:] + } else { + if len(in) < int(iSize) { + return s, nil, fmt.Errorf("input too small for table, want %d bytes, have %d", iSize, len(in)) + } + // FSE compressed weights + s.fse.DecompressLimit = 255 + hw := s.huffWeight[:] + s.fse.Out = hw + b, err := fse.Decompress(in[:iSize], s.fse) + s.fse.Out = nil + if err != nil { + return s, nil, fmt.Errorf("fse decompress returned: %w", err) + } + if len(b) > 255 { + return s, nil, errors.New("corrupt input: output table too large") + } + s.symbolLen = uint16(len(b)) + in = in[iSize:] + } + + // collect weight stats + var rankStats [16]uint32 + weightTotal := uint32(0) + for _, v := range s.huffWeight[:s.symbolLen] { + if v > tableLogMax { + return s, nil, errors.New("corrupt input: weight too large") + } + v2 := v & 15 + rankStats[v2]++ + // (1 << (v2-1)) is slower since the compiler cannot prove that v2 isn't 0. + weightTotal += (1 << v2) >> 1 + } + if weightTotal == 0 { + return s, nil, errors.New("corrupt input: weights zero") + } + + // get last non-null symbol weight (implied, total must be 2^n) + { + tableLog := highBit32(weightTotal) + 1 + if tableLog > tableLogMax { + return s, nil, errors.New("corrupt input: tableLog too big") + } + s.actualTableLog = uint8(tableLog) + // determine last weight + { + total := uint32(1) << tableLog + rest := total - weightTotal + verif := uint32(1) << highBit32(rest) + lastWeight := highBit32(rest) + 1 + if verif != rest { + // last value must be a clean power of 2 + return s, nil, errors.New("corrupt input: last value not power of two") + } + s.huffWeight[s.symbolLen] = uint8(lastWeight) + s.symbolLen++ + rankStats[lastWeight]++ + } + } + + if (rankStats[1] < 2) || (rankStats[1]&1 != 0) { + // by construction : at least 2 elts of rank 1, must be even + return s, nil, errors.New("corrupt input: min elt size, even check failed ") + } + + // TODO: Choose between single/double symbol decoding + + // Calculate starting value for each rank + { + var nextRankStart uint32 + for n := uint8(1); n < s.actualTableLog+1; n++ { + current := nextRankStart + nextRankStart += rankStats[n] << (n - 1) + rankStats[n] = current + } + } + + // fill DTable (always full size) + tSize := 1 << tableLogMax + if len(s.dt.single) != tSize { + s.dt.single = make([]dEntrySingle, tSize) + } + cTable := s.prevTable + if cap(cTable) < maxSymbolValue+1 { + cTable = make([]cTableEntry, 0, maxSymbolValue+1) + } + cTable = cTable[:maxSymbolValue+1] + s.prevTable = cTable[:s.symbolLen] + s.prevTableLog = s.actualTableLog + + for n, w := range s.huffWeight[:s.symbolLen] { + if w == 0 { + cTable[n] = cTableEntry{ + val: 0, + nBits: 0, + } + continue + } + length := (uint32(1) << w) >> 1 + d := dEntrySingle{ + entry: uint16(s.actualTableLog+1-w) | (uint16(n) << 8), + } + + rank := &rankStats[w] + cTable[n] = cTableEntry{ + val: uint16(*rank >> (w - 1)), + nBits: uint8(d.entry), + } + + single := s.dt.single[*rank : *rank+length] + for i := range single { + single[i] = d + } + *rank += length + } + + return s, in, nil +} + +// Decompress1X will decompress a 1X encoded stream. +// The length of the supplied input must match the end of a block exactly. +// Before this is called, the table must be initialized with ReadTable unless +// the encoder re-used the table. +// deprecated: Use the stateless Decoder() to get a concurrent version. +func (s *Scratch) Decompress1X(in []byte) (out []byte, err error) { + if cap(s.Out) < s.MaxDecodedSize { + s.Out = make([]byte, s.MaxDecodedSize) + } + s.Out = s.Out[:0:s.MaxDecodedSize] + s.Out, err = s.Decoder().Decompress1X(s.Out, in) + return s.Out, err +} + +// Decompress4X will decompress a 4X encoded stream. +// Before this is called, the table must be initialized with ReadTable unless +// the encoder re-used the table. +// The length of the supplied input must match the end of a block exactly. +// The destination size of the uncompressed data must be known and provided. +// deprecated: Use the stateless Decoder() to get a concurrent version. +func (s *Scratch) Decompress4X(in []byte, dstSize int) (out []byte, err error) { + if dstSize > s.MaxDecodedSize { + return nil, ErrMaxDecodedSizeExceeded + } + if cap(s.Out) < dstSize { + s.Out = make([]byte, s.MaxDecodedSize) + } + s.Out = s.Out[:0:dstSize] + s.Out, err = s.Decoder().Decompress4X(s.Out, in) + return s.Out, err +} + +// Decoder will return a stateless decoder that can be used by multiple +// decompressors concurrently. +// Before this is called, the table must be initialized with ReadTable. +// The Decoder is still linked to the scratch buffer so that cannot be reused. +// However, it is safe to discard the scratch. +func (s *Scratch) Decoder() *Decoder { + return &Decoder{ + dt: s.dt, + actualTableLog: s.actualTableLog, + bufs: &s.decPool, + } +} + +// Decoder provides stateless decoding. +type Decoder struct { + dt dTable + actualTableLog uint8 + bufs *sync.Pool +} + +func (d *Decoder) buffer() *[4][256]byte { + buf, ok := d.bufs.Get().(*[4][256]byte) + if ok { + return buf + } + return &[4][256]byte{} +} + +// decompress1X8Bit will decompress a 1X encoded stream with tablelog <= 8. +// The cap of the output buffer will be the maximum decompressed size. +// The length of the supplied input must match the end of a block exactly. +func (d *Decoder) decompress1X8Bit(dst, src []byte) ([]byte, error) { + if d.actualTableLog == 8 { + return d.decompress1X8BitExactly(dst, src) + } + var br bitReaderBytes + err := br.init(src) + if err != nil { + return dst, err + } + maxDecodedSize := cap(dst) + dst = dst[:0] + + // Avoid bounds check by always having full sized table. + dt := d.dt.single[:256] + + // Use temp table to avoid bound checks/append penalty. + bufs := d.buffer() + buf := &bufs[0] + var off uint8 + + switch d.actualTableLog { + case 8: + const shift = 0 + for br.off >= 4 { + br.fillFast() + v := dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+0] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+1] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+2] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+3] = uint8(v.entry >> 8) + + off += 4 + if off == 0 { + if len(dst)+256 > maxDecodedSize { + br.close() + d.bufs.Put(bufs) + return nil, ErrMaxDecodedSizeExceeded + } + dst = append(dst, buf[:]...) + } + } + case 7: + const shift = 8 - 7 + for br.off >= 4 { + br.fillFast() + v := dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+0] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+1] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+2] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+3] = uint8(v.entry >> 8) + + off += 4 + if off == 0 { + if len(dst)+256 > maxDecodedSize { + br.close() + d.bufs.Put(bufs) + return nil, ErrMaxDecodedSizeExceeded + } + dst = append(dst, buf[:]...) + } + } + case 6: + const shift = 8 - 6 + for br.off >= 4 { + br.fillFast() + v := dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+0] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+1] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+2] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+3] = uint8(v.entry >> 8) + + off += 4 + if off == 0 { + if len(dst)+256 > maxDecodedSize { + d.bufs.Put(bufs) + br.close() + return nil, ErrMaxDecodedSizeExceeded + } + dst = append(dst, buf[:]...) + } + } + case 5: + const shift = 8 - 5 + for br.off >= 4 { + br.fillFast() + v := dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+0] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+1] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+2] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+3] = uint8(v.entry >> 8) + + off += 4 + if off == 0 { + if len(dst)+256 > maxDecodedSize { + d.bufs.Put(bufs) + br.close() + return nil, ErrMaxDecodedSizeExceeded + } + dst = append(dst, buf[:]...) + } + } + case 4: + const shift = 8 - 4 + for br.off >= 4 { + br.fillFast() + v := dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+0] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+1] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+2] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+3] = uint8(v.entry >> 8) + + off += 4 + if off == 0 { + if len(dst)+256 > maxDecodedSize { + d.bufs.Put(bufs) + br.close() + return nil, ErrMaxDecodedSizeExceeded + } + dst = append(dst, buf[:]...) + } + } + case 3: + const shift = 8 - 3 + for br.off >= 4 { + br.fillFast() + v := dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+0] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+1] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+2] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+3] = uint8(v.entry >> 8) + + off += 4 + if off == 0 { + if len(dst)+256 > maxDecodedSize { + d.bufs.Put(bufs) + br.close() + return nil, ErrMaxDecodedSizeExceeded + } + dst = append(dst, buf[:]...) + } + } + case 2: + const shift = 8 - 2 + for br.off >= 4 { + br.fillFast() + v := dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+0] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+1] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+2] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+3] = uint8(v.entry >> 8) + + off += 4 + if off == 0 { + if len(dst)+256 > maxDecodedSize { + d.bufs.Put(bufs) + br.close() + return nil, ErrMaxDecodedSizeExceeded + } + dst = append(dst, buf[:]...) + } + } + case 1: + const shift = 8 - 1 + for br.off >= 4 { + br.fillFast() + v := dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+0] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+1] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+2] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>(56+shift))] + br.advance(uint8(v.entry)) + buf[off+3] = uint8(v.entry >> 8) + + off += 4 + if off == 0 { + if len(dst)+256 > maxDecodedSize { + d.bufs.Put(bufs) + br.close() + return nil, ErrMaxDecodedSizeExceeded + } + dst = append(dst, buf[:]...) + } + } + default: + d.bufs.Put(bufs) + return nil, fmt.Errorf("invalid tablelog: %d", d.actualTableLog) + } + + if len(dst)+int(off) > maxDecodedSize { + d.bufs.Put(bufs) + br.close() + return nil, ErrMaxDecodedSizeExceeded + } + dst = append(dst, buf[:off]...) + + // br < 4, so uint8 is fine + bitsLeft := int8(uint8(br.off)*8 + (64 - br.bitsRead)) + shift := (8 - d.actualTableLog) & 7 + + for bitsLeft > 0 { + if br.bitsRead >= 64-8 { + for br.off > 0 { + br.value |= uint64(br.in[br.off-1]) << (br.bitsRead - 8) + br.bitsRead -= 8 + br.off-- + } + } + if len(dst) >= maxDecodedSize { + br.close() + d.bufs.Put(bufs) + return nil, ErrMaxDecodedSizeExceeded + } + v := dt[br.peekByteFast()>>shift] + nBits := uint8(v.entry) + br.advance(nBits) + bitsLeft -= int8(nBits) + dst = append(dst, uint8(v.entry>>8)) + } + d.bufs.Put(bufs) + return dst, br.close() +} + +// decompress1X8Bit will decompress a 1X encoded stream with tablelog <= 8. +// The cap of the output buffer will be the maximum decompressed size. +// The length of the supplied input must match the end of a block exactly. +func (d *Decoder) decompress1X8BitExactly(dst, src []byte) ([]byte, error) { + var br bitReaderBytes + err := br.init(src) + if err != nil { + return dst, err + } + maxDecodedSize := cap(dst) + dst = dst[:0] + + // Avoid bounds check by always having full sized table. + dt := d.dt.single[:256] + + // Use temp table to avoid bound checks/append penalty. + bufs := d.buffer() + buf := &bufs[0] + var off uint8 + + const shift = 56 + + //fmt.Printf("mask: %b, tl:%d\n", mask, d.actualTableLog) + for br.off >= 4 { + br.fillFast() + v := dt[uint8(br.value>>shift)] + br.advance(uint8(v.entry)) + buf[off+0] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>shift)] + br.advance(uint8(v.entry)) + buf[off+1] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>shift)] + br.advance(uint8(v.entry)) + buf[off+2] = uint8(v.entry >> 8) + + v = dt[uint8(br.value>>shift)] + br.advance(uint8(v.entry)) + buf[off+3] = uint8(v.entry >> 8) + + off += 4 + if off == 0 { + if len(dst)+256 > maxDecodedSize { + d.bufs.Put(bufs) + br.close() + return nil, ErrMaxDecodedSizeExceeded + } + dst = append(dst, buf[:]...) + } + } + + if len(dst)+int(off) > maxDecodedSize { + d.bufs.Put(bufs) + br.close() + return nil, ErrMaxDecodedSizeExceeded + } + dst = append(dst, buf[:off]...) + + // br < 4, so uint8 is fine + bitsLeft := int8(uint8(br.off)*8 + (64 - br.bitsRead)) + for bitsLeft > 0 { + if br.bitsRead >= 64-8 { + for br.off > 0 { + br.value |= uint64(br.in[br.off-1]) << (br.bitsRead - 8) + br.bitsRead -= 8 + br.off-- + } + } + if len(dst) >= maxDecodedSize { + d.bufs.Put(bufs) + br.close() + return nil, ErrMaxDecodedSizeExceeded + } + v := dt[br.peekByteFast()] + nBits := uint8(v.entry) + br.advance(nBits) + bitsLeft -= int8(nBits) + dst = append(dst, uint8(v.entry>>8)) + } + d.bufs.Put(bufs) + return dst, br.close() +} + +// Decompress4X will decompress a 4X encoded stream. +// The length of the supplied input must match the end of a block exactly. +// The *capacity* of the dst slice must match the destination size of +// the uncompressed data exactly. +func (d *Decoder) decompress4X8bit(dst, src []byte) ([]byte, error) { + if d.actualTableLog == 8 { + return d.decompress4X8bitExactly(dst, src) + } + + var br [4]bitReaderBytes + start := 6 + for i := range 3 { + length := int(src[i*2]) | (int(src[i*2+1]) << 8) + if start+length >= len(src) { + return nil, errors.New("truncated input (or invalid offset)") + } + err := br[i].init(src[start : start+length]) + if err != nil { + return nil, err + } + start += length + } + err := br[3].init(src[start:]) + if err != nil { + return nil, err + } + + // destination, offset to match first output + dstSize := cap(dst) + dst = dst[:dstSize] + out := dst + dstEvery := (dstSize + 3) / 4 + + shift := (56 + (8 - d.actualTableLog)) & 63 + + const tlSize = 1 << 8 + single := d.dt.single[:tlSize] + + // Use temp table to avoid bound checks/append penalty. + buf := d.buffer() + var off uint8 + var decoded int + + // Decode 4 values from each decoder/loop. + const bufoff = 256 + for { + if br[0].off < 4 || br[1].off < 4 || br[2].off < 4 || br[3].off < 4 { + break + } + + { + // Interleave 2 decodes. + const stream = 0 + const stream2 = 1 + br1 := &br[stream] + br2 := &br[stream2] + br1.fillFast() + br2.fillFast() + + v := single[uint8(br1.value>>shift)].entry + v2 := single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off] = uint8(v >> 8) + buf[stream2][off] = uint8(v2 >> 8) + + v = single[uint8(br1.value>>shift)].entry + v2 = single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off+1] = uint8(v >> 8) + buf[stream2][off+1] = uint8(v2 >> 8) + + v = single[uint8(br1.value>>shift)].entry + v2 = single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off+2] = uint8(v >> 8) + buf[stream2][off+2] = uint8(v2 >> 8) + + v = single[uint8(br1.value>>shift)].entry + v2 = single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off+3] = uint8(v >> 8) + buf[stream2][off+3] = uint8(v2 >> 8) + } + + { + const stream = 2 + const stream2 = 3 + br1 := &br[stream] + br2 := &br[stream2] + br1.fillFast() + br2.fillFast() + + v := single[uint8(br1.value>>shift)].entry + v2 := single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off] = uint8(v >> 8) + buf[stream2][off] = uint8(v2 >> 8) + + v = single[uint8(br1.value>>shift)].entry + v2 = single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off+1] = uint8(v >> 8) + buf[stream2][off+1] = uint8(v2 >> 8) + + v = single[uint8(br1.value>>shift)].entry + v2 = single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off+2] = uint8(v >> 8) + buf[stream2][off+2] = uint8(v2 >> 8) + + v = single[uint8(br1.value>>shift)].entry + v2 = single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off+3] = uint8(v >> 8) + buf[stream2][off+3] = uint8(v2 >> 8) + } + + off += 4 + + if off == 0 { + if bufoff > dstEvery { + d.bufs.Put(buf) + return nil, errors.New("corruption detected: stream overrun 1") + } + // There must at least be 3 buffers left. + if len(out)-bufoff < dstEvery*3 { + d.bufs.Put(buf) + return nil, errors.New("corruption detected: stream overrun 2") + } + //copy(out, buf[0][:]) + //copy(out[dstEvery:], buf[1][:]) + //copy(out[dstEvery*2:], buf[2][:]) + *(*[bufoff]byte)(out) = buf[0] + *(*[bufoff]byte)(out[dstEvery:]) = buf[1] + *(*[bufoff]byte)(out[dstEvery*2:]) = buf[2] + *(*[bufoff]byte)(out[dstEvery*3:]) = buf[3] + out = out[bufoff:] + decoded += bufoff * 4 + } + } + if off > 0 { + ioff := int(off) + if len(out) < dstEvery*3+ioff { + d.bufs.Put(buf) + return nil, errors.New("corruption detected: stream overrun 3") + } + copy(out, buf[0][:off]) + copy(out[dstEvery:], buf[1][:off]) + copy(out[dstEvery*2:], buf[2][:off]) + copy(out[dstEvery*3:], buf[3][:off]) + decoded += int(off) * 4 + out = out[off:] + } + + // Decode remaining. + // Decode remaining. + remainBytes := dstEvery - (decoded / 4) + for i := range br { + offset := dstEvery * i + endsAt := min(offset+remainBytes, len(out)) + br := &br[i] + bitsLeft := br.remaining() + for bitsLeft > 0 { + if br.finished() { + d.bufs.Put(buf) + return nil, io.ErrUnexpectedEOF + } + if br.bitsRead >= 56 { + if br.off >= 4 { + v := br.in[br.off-4:] + v = v[:4] + low := (uint32(v[0])) | (uint32(v[1]) << 8) | (uint32(v[2]) << 16) | (uint32(v[3]) << 24) + br.value |= uint64(low) << (br.bitsRead - 32) + br.bitsRead -= 32 + br.off -= 4 + } else { + for br.off > 0 { + br.value |= uint64(br.in[br.off-1]) << (br.bitsRead - 8) + br.bitsRead -= 8 + br.off-- + } + } + } + // end inline... + if offset >= endsAt { + d.bufs.Put(buf) + return nil, errors.New("corruption detected: stream overrun 4") + } + + // Read value and increment offset. + v := single[uint8(br.value>>shift)].entry + nBits := uint8(v) + br.advance(nBits) + bitsLeft -= uint(nBits) + out[offset] = uint8(v >> 8) + offset++ + } + if offset != endsAt { + d.bufs.Put(buf) + return nil, fmt.Errorf("corruption detected: short output block %d, end %d != %d", i, offset, endsAt) + } + decoded += offset - dstEvery*i + err = br.close() + if err != nil { + d.bufs.Put(buf) + return nil, err + } + } + d.bufs.Put(buf) + if dstSize != decoded { + return nil, errors.New("corruption detected: short output block") + } + return dst, nil +} + +// Decompress4X will decompress a 4X encoded stream. +// The length of the supplied input must match the end of a block exactly. +// The *capacity* of the dst slice must match the destination size of +// the uncompressed data exactly. +func (d *Decoder) decompress4X8bitExactly(dst, src []byte) ([]byte, error) { + var br [4]bitReaderBytes + start := 6 + for i := range 3 { + length := int(src[i*2]) | (int(src[i*2+1]) << 8) + if start+length >= len(src) { + return nil, errors.New("truncated input (or invalid offset)") + } + err := br[i].init(src[start : start+length]) + if err != nil { + return nil, err + } + start += length + } + err := br[3].init(src[start:]) + if err != nil { + return nil, err + } + + // destination, offset to match first output + dstSize := cap(dst) + dst = dst[:dstSize] + out := dst + dstEvery := (dstSize + 3) / 4 + + const shift = 56 + const tlSize = 1 << 8 + single := d.dt.single[:tlSize] + + // Use temp table to avoid bound checks/append penalty. + buf := d.buffer() + var off uint8 + var decoded int + + // Decode 4 values from each decoder/loop. + const bufoff = 256 + for { + if br[0].off < 4 || br[1].off < 4 || br[2].off < 4 || br[3].off < 4 { + break + } + + { + // Interleave 2 decodes. + const stream = 0 + const stream2 = 1 + br1 := &br[stream] + br2 := &br[stream2] + br1.fillFast() + br2.fillFast() + + v := single[uint8(br1.value>>shift)].entry + v2 := single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off] = uint8(v >> 8) + buf[stream2][off] = uint8(v2 >> 8) + + v = single[uint8(br1.value>>shift)].entry + v2 = single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off+1] = uint8(v >> 8) + buf[stream2][off+1] = uint8(v2 >> 8) + + v = single[uint8(br1.value>>shift)].entry + v2 = single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off+2] = uint8(v >> 8) + buf[stream2][off+2] = uint8(v2 >> 8) + + v = single[uint8(br1.value>>shift)].entry + v2 = single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off+3] = uint8(v >> 8) + buf[stream2][off+3] = uint8(v2 >> 8) + } + + { + const stream = 2 + const stream2 = 3 + br1 := &br[stream] + br2 := &br[stream2] + br1.fillFast() + br2.fillFast() + + v := single[uint8(br1.value>>shift)].entry + v2 := single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off] = uint8(v >> 8) + buf[stream2][off] = uint8(v2 >> 8) + + v = single[uint8(br1.value>>shift)].entry + v2 = single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off+1] = uint8(v >> 8) + buf[stream2][off+1] = uint8(v2 >> 8) + + v = single[uint8(br1.value>>shift)].entry + v2 = single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off+2] = uint8(v >> 8) + buf[stream2][off+2] = uint8(v2 >> 8) + + v = single[uint8(br1.value>>shift)].entry + v2 = single[uint8(br2.value>>shift)].entry + br1.bitsRead += uint8(v) + br1.value <<= v & 63 + br2.bitsRead += uint8(v2) + br2.value <<= v2 & 63 + buf[stream][off+3] = uint8(v >> 8) + buf[stream2][off+3] = uint8(v2 >> 8) + } + + off += 4 + + if off == 0 { + if bufoff > dstEvery { + d.bufs.Put(buf) + return nil, errors.New("corruption detected: stream overrun 1") + } + // There must at least be 3 buffers left. + if len(out)-bufoff < dstEvery*3 { + d.bufs.Put(buf) + return nil, errors.New("corruption detected: stream overrun 2") + } + + //copy(out, buf[0][:]) + //copy(out[dstEvery:], buf[1][:]) + //copy(out[dstEvery*2:], buf[2][:]) + // copy(out[dstEvery*3:], buf[3][:]) + *(*[bufoff]byte)(out) = buf[0] + *(*[bufoff]byte)(out[dstEvery:]) = buf[1] + *(*[bufoff]byte)(out[dstEvery*2:]) = buf[2] + *(*[bufoff]byte)(out[dstEvery*3:]) = buf[3] + out = out[bufoff:] + decoded += bufoff * 4 + } + } + if off > 0 { + ioff := int(off) + if len(out) < dstEvery*3+ioff { + return nil, errors.New("corruption detected: stream overrun 3") + } + copy(out, buf[0][:off]) + copy(out[dstEvery:], buf[1][:off]) + copy(out[dstEvery*2:], buf[2][:off]) + copy(out[dstEvery*3:], buf[3][:off]) + decoded += int(off) * 4 + out = out[off:] + } + + // Decode remaining. + remainBytes := dstEvery - (decoded / 4) + for i := range br { + offset := dstEvery * i + endsAt := min(offset+remainBytes, len(out)) + br := &br[i] + bitsLeft := br.remaining() + for bitsLeft > 0 { + if br.finished() { + d.bufs.Put(buf) + return nil, io.ErrUnexpectedEOF + } + if br.bitsRead >= 56 { + if br.off >= 4 { + v := br.in[br.off-4:] + v = v[:4] + low := (uint32(v[0])) | (uint32(v[1]) << 8) | (uint32(v[2]) << 16) | (uint32(v[3]) << 24) + br.value |= uint64(low) << (br.bitsRead - 32) + br.bitsRead -= 32 + br.off -= 4 + } else { + for br.off > 0 { + br.value |= uint64(br.in[br.off-1]) << (br.bitsRead - 8) + br.bitsRead -= 8 + br.off-- + } + } + } + // end inline... + if offset >= endsAt { + d.bufs.Put(buf) + return nil, errors.New("corruption detected: stream overrun 4") + } + + // Read value and increment offset. + v := single[br.peekByteFast()].entry + nBits := uint8(v) + br.advance(nBits) + bitsLeft -= uint(nBits) + out[offset] = uint8(v >> 8) + offset++ + } + if offset != endsAt { + d.bufs.Put(buf) + return nil, fmt.Errorf("corruption detected: short output block %d, end %d != %d", i, offset, endsAt) + } + + decoded += offset - dstEvery*i + err = br.close() + if err != nil { + d.bufs.Put(buf) + return nil, err + } + } + d.bufs.Put(buf) + if dstSize != decoded { + return nil, errors.New("corruption detected: short output block") + } + return dst, nil +} + +// matches will compare a decoding table to a coding table. +// Errors are written to the writer. +// Nothing will be written if table is ok. +func (s *Scratch) matches(ct cTable, w io.Writer) { + if s == nil || len(s.dt.single) == 0 { + return + } + dt := s.dt.single[:1<>8) == byte(sym) { + fmt.Fprintf(w, "symbol %x has decoder, but no encoder\n", sym) + errs++ + break + } + } + if errs == 0 { + broken-- + } + continue + } + // Unused bits in input + ub := tablelog - enc.nBits + top := enc.val << ub + // decoder looks at top bits. + dec := dt[top] + if uint8(dec.entry) != enc.nBits { + fmt.Fprintf(w, "symbol 0x%x bit size mismatch (enc: %d, dec:%d).\n", sym, enc.nBits, uint8(dec.entry)) + errs++ + } + if uint8(dec.entry>>8) != uint8(sym) { + fmt.Fprintf(w, "symbol 0x%x decoder output mismatch (enc: %d, dec:%d).\n", sym, sym, uint8(dec.entry>>8)) + errs++ + } + if errs > 0 { + fmt.Fprintf(w, "%d errors in base, stopping\n", errs) + continue + } + // Ensure that all combinations are covered. + for i := uint16(0); i < (1 << ub); i++ { + vval := top | i + dec := dt[vval] + if uint8(dec.entry) != enc.nBits { + fmt.Fprintf(w, "symbol 0x%x bit size mismatch (enc: %d, dec:%d).\n", vval, enc.nBits, uint8(dec.entry)) + errs++ + } + if uint8(dec.entry>>8) != uint8(sym) { + fmt.Fprintf(w, "symbol 0x%x decoder output mismatch (enc: %d, dec:%d).\n", vval, sym, uint8(dec.entry>>8)) + errs++ + } + if errs > 20 { + fmt.Fprintf(w, "%d errors, stopping\n", errs) + break + } + } + if errs == 0 { + ok++ + broken-- + } + } + if broken > 0 { + fmt.Fprintf(w, "%d broken, %d ok\n", broken, ok) + } +} diff --git a/backend/vendor/github.com/klauspost/compress/huff0/decompress_amd64.go b/backend/vendor/github.com/klauspost/compress/huff0/decompress_amd64.go new file mode 100644 index 0000000..99ddd4a --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/huff0/decompress_amd64.go @@ -0,0 +1,223 @@ +//go:build amd64 && !appengine && !noasm && gc +// +build amd64,!appengine,!noasm,gc + +// This file contains the specialisation of Decoder.Decompress4X +// and Decoder.Decompress1X that use an asm implementation of thir main loops. +package huff0 + +import ( + "errors" + "fmt" + + "github.com/klauspost/compress/internal/cpuinfo" +) + +// decompress4x_main_loop_x86 is an x86 assembler implementation +// of Decompress4X when tablelog > 8. +// +//go:noescape +func decompress4x_main_loop_amd64(ctx *decompress4xContext) + +// decompress4x_8b_loop_x86 is an x86 assembler implementation +// of Decompress4X when tablelog <= 8 which decodes 4 entries +// per loop. +// +//go:noescape +func decompress4x_8b_main_loop_amd64(ctx *decompress4xContext) + +// fallback8BitSize is the size where using Go version is faster. +const fallback8BitSize = 800 + +type decompress4xContext struct { + pbr *[4]bitReaderShifted + peekBits uint8 + out *byte + dstEvery int + tbl *dEntrySingle + decoded int + limit *byte +} + +// Decompress4X will decompress a 4X encoded stream. +// The length of the supplied input must match the end of a block exactly. +// The *capacity* of the dst slice must match the destination size of +// the uncompressed data exactly. +func (d *Decoder) Decompress4X(dst, src []byte) ([]byte, error) { + if len(d.dt.single) == 0 { + return nil, errors.New("no table loaded") + } + if len(src) < 6+(4*1) { + return nil, errors.New("input too small") + } + + use8BitTables := d.actualTableLog <= 8 + if cap(dst) < fallback8BitSize && use8BitTables { + return d.decompress4X8bit(dst, src) + } + + var br [4]bitReaderShifted + // Decode "jump table" + start := 6 + for i := range 3 { + length := int(src[i*2]) | (int(src[i*2+1]) << 8) + if start+length >= len(src) { + return nil, errors.New("truncated input (or invalid offset)") + } + err := br[i].init(src[start : start+length]) + if err != nil { + return nil, err + } + start += length + } + err := br[3].init(src[start:]) + if err != nil { + return nil, err + } + + // destination, offset to match first output + dstSize := cap(dst) + dst = dst[:dstSize] + out := dst + dstEvery := (dstSize + 3) / 4 + + const tlSize = 1 << tableLogMax + const tlMask = tlSize - 1 + single := d.dt.single[:tlSize] + + var decoded int + + if len(out) > 4*4 && !(br[0].off < 4 || br[1].off < 4 || br[2].off < 4 || br[3].off < 4) { + ctx := decompress4xContext{ + pbr: &br, + peekBits: uint8((64 - d.actualTableLog) & 63), // see: bitReaderShifted.peekBitsFast() + out: &out[0], + dstEvery: dstEvery, + tbl: &single[0], + limit: &out[dstEvery-4], // Always stop decoding when first buffer gets here to avoid writing OOB on last. + } + if use8BitTables { + decompress4x_8b_main_loop_amd64(&ctx) + } else { + decompress4x_main_loop_amd64(&ctx) + } + + decoded = ctx.decoded + out = out[decoded/4:] + } + + // Decode remaining. + remainBytes := dstEvery - (decoded / 4) + for i := range br { + offset := dstEvery * i + endsAt := min(offset+remainBytes, len(out)) + br := &br[i] + bitsLeft := br.remaining() + for bitsLeft > 0 { + br.fill() + if offset >= endsAt { + return nil, errors.New("corruption detected: stream overrun 4") + } + + // Read value and increment offset. + val := br.peekBitsFast(d.actualTableLog) + v := single[val&tlMask].entry + nBits := uint8(v) + br.advance(nBits) + bitsLeft -= uint(nBits) + out[offset] = uint8(v >> 8) + offset++ + } + if offset != endsAt { + return nil, fmt.Errorf("corruption detected: short output block %d, end %d != %d", i, offset, endsAt) + } + decoded += offset - dstEvery*i + err = br.close() + if err != nil { + return nil, err + } + } + if dstSize != decoded { + return nil, errors.New("corruption detected: short output block") + } + return dst, nil +} + +// decompress4x_main_loop_x86 is an x86 assembler implementation +// of Decompress1X when tablelog > 8. +// +//go:noescape +func decompress1x_main_loop_amd64(ctx *decompress1xContext) + +// decompress4x_main_loop_x86 is an x86 with BMI2 assembler implementation +// of Decompress1X when tablelog > 8. +// +//go:noescape +func decompress1x_main_loop_bmi2(ctx *decompress1xContext) + +type decompress1xContext struct { + pbr *bitReaderShifted + peekBits uint8 + out *byte + outCap int + tbl *dEntrySingle + decoded int +} + +// Error reported by asm implementations +const error_max_decoded_size_exeeded = -1 + +// Decompress1X will decompress a 1X encoded stream. +// The cap of the output buffer will be the maximum decompressed size. +// The length of the supplied input must match the end of a block exactly. +func (d *Decoder) Decompress1X(dst, src []byte) ([]byte, error) { + if len(d.dt.single) == 0 { + return nil, errors.New("no table loaded") + } + var br bitReaderShifted + err := br.init(src) + if err != nil { + return dst, err + } + maxDecodedSize := cap(dst) + dst = dst[:maxDecodedSize] + + const tlSize = 1 << tableLogMax + const tlMask = tlSize - 1 + + if maxDecodedSize >= 4 { + ctx := decompress1xContext{ + pbr: &br, + out: &dst[0], + outCap: maxDecodedSize, + peekBits: uint8((64 - d.actualTableLog) & 63), // see: bitReaderShifted.peekBitsFast() + tbl: &d.dt.single[0], + } + + if cpuinfo.HasBMI2() { + decompress1x_main_loop_bmi2(&ctx) + } else { + decompress1x_main_loop_amd64(&ctx) + } + if ctx.decoded == error_max_decoded_size_exeeded { + return nil, ErrMaxDecodedSizeExceeded + } + + dst = dst[:ctx.decoded] + } + + // br < 8, so uint8 is fine + bitsLeft := uint8(br.off)*8 + 64 - br.bitsRead + for bitsLeft > 0 { + br.fill() + if len(dst) >= maxDecodedSize { + br.close() + return nil, ErrMaxDecodedSizeExceeded + } + v := d.dt.single[br.peekBitsFast(d.actualTableLog)&tlMask] + nBits := uint8(v.entry) + br.advance(nBits) + bitsLeft -= nBits + dst = append(dst, uint8(v.entry>>8)) + } + return dst, br.close() +} diff --git a/backend/vendor/github.com/klauspost/compress/huff0/decompress_amd64.s b/backend/vendor/github.com/klauspost/compress/huff0/decompress_amd64.s new file mode 100644 index 0000000..c4c7ab2 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/huff0/decompress_amd64.s @@ -0,0 +1,830 @@ +// Code generated by command: go run gen.go -out ../decompress_amd64.s -pkg=huff0. DO NOT EDIT. + +//go:build amd64 && !appengine && !noasm && gc + +// func decompress4x_main_loop_amd64(ctx *decompress4xContext) +TEXT ·decompress4x_main_loop_amd64(SB), $0-8 + // Preload values + MOVQ ctx+0(FP), AX + MOVBQZX 8(AX), DI + MOVQ 16(AX), BX + MOVQ 48(AX), SI + MOVQ 24(AX), R8 + MOVQ 32(AX), R9 + MOVQ (AX), R10 + + // Main loop +main_loop: + XORL DX, DX + CMPQ BX, SI + SETGE DL + + // br0.fillFast32() + MOVQ 32(R10), R11 + MOVBQZX 40(R10), R12 + CMPQ R12, $0x20 + JBE skip_fill0 + MOVQ 24(R10), AX + SUBQ $0x20, R12 + SUBQ $0x04, AX + MOVQ (R10), R13 + + // b.value |= uint64(low) << (b.bitsRead & 63) + MOVL (AX)(R13*1), R13 + MOVQ R12, CX + SHLQ CL, R13 + MOVQ AX, 24(R10) + ORQ R13, R11 + + // exhausted += (br0.off < 4) + CMPQ AX, $0x04 + ADCB $+0, DL + +skip_fill0: + // val0 := br0.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v0 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br0.advance(uint8(v0.entry) + MOVB CH, AL + SHLQ CL, R11 + ADDB CL, R12 + + // val1 := br0.peekTopBits(peekBits) + MOVQ DI, CX + MOVQ R11, R13 + SHRQ CL, R13 + + // v1 := table[val1&mask] + MOVW (R9)(R13*2), CX + + // br0.advance(uint8(v1.entry)) + MOVB CH, AH + SHLQ CL, R11 + ADDB CL, R12 + + // these two writes get coalesced + // out[id * dstEvery + 0] = uint8(v0.entry >> 8) + // out[id * dstEvery + 1] = uint8(v1.entry >> 8) + MOVW AX, (BX) + + // update the bitreader structure + MOVQ R11, 32(R10) + MOVB R12, 40(R10) + + // br1.fillFast32() + MOVQ 80(R10), R11 + MOVBQZX 88(R10), R12 + CMPQ R12, $0x20 + JBE skip_fill1 + MOVQ 72(R10), AX + SUBQ $0x20, R12 + SUBQ $0x04, AX + MOVQ 48(R10), R13 + + // b.value |= uint64(low) << (b.bitsRead & 63) + MOVL (AX)(R13*1), R13 + MOVQ R12, CX + SHLQ CL, R13 + MOVQ AX, 72(R10) + ORQ R13, R11 + + // exhausted += (br1.off < 4) + CMPQ AX, $0x04 + ADCB $+0, DL + +skip_fill1: + // val0 := br1.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v0 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br1.advance(uint8(v0.entry) + MOVB CH, AL + SHLQ CL, R11 + ADDB CL, R12 + + // val1 := br1.peekTopBits(peekBits) + MOVQ DI, CX + MOVQ R11, R13 + SHRQ CL, R13 + + // v1 := table[val1&mask] + MOVW (R9)(R13*2), CX + + // br1.advance(uint8(v1.entry)) + MOVB CH, AH + SHLQ CL, R11 + ADDB CL, R12 + + // these two writes get coalesced + // out[id * dstEvery + 0] = uint8(v0.entry >> 8) + // out[id * dstEvery + 1] = uint8(v1.entry >> 8) + MOVW AX, (BX)(R8*1) + + // update the bitreader structure + MOVQ R11, 80(R10) + MOVB R12, 88(R10) + + // br2.fillFast32() + MOVQ 128(R10), R11 + MOVBQZX 136(R10), R12 + CMPQ R12, $0x20 + JBE skip_fill2 + MOVQ 120(R10), AX + SUBQ $0x20, R12 + SUBQ $0x04, AX + MOVQ 96(R10), R13 + + // b.value |= uint64(low) << (b.bitsRead & 63) + MOVL (AX)(R13*1), R13 + MOVQ R12, CX + SHLQ CL, R13 + MOVQ AX, 120(R10) + ORQ R13, R11 + + // exhausted += (br2.off < 4) + CMPQ AX, $0x04 + ADCB $+0, DL + +skip_fill2: + // val0 := br2.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v0 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br2.advance(uint8(v0.entry) + MOVB CH, AL + SHLQ CL, R11 + ADDB CL, R12 + + // val1 := br2.peekTopBits(peekBits) + MOVQ DI, CX + MOVQ R11, R13 + SHRQ CL, R13 + + // v1 := table[val1&mask] + MOVW (R9)(R13*2), CX + + // br2.advance(uint8(v1.entry)) + MOVB CH, AH + SHLQ CL, R11 + ADDB CL, R12 + + // these two writes get coalesced + // out[id * dstEvery + 0] = uint8(v0.entry >> 8) + // out[id * dstEvery + 1] = uint8(v1.entry >> 8) + MOVW AX, (BX)(R8*2) + + // update the bitreader structure + MOVQ R11, 128(R10) + MOVB R12, 136(R10) + + // br3.fillFast32() + MOVQ 176(R10), R11 + MOVBQZX 184(R10), R12 + CMPQ R12, $0x20 + JBE skip_fill3 + MOVQ 168(R10), AX + SUBQ $0x20, R12 + SUBQ $0x04, AX + MOVQ 144(R10), R13 + + // b.value |= uint64(low) << (b.bitsRead & 63) + MOVL (AX)(R13*1), R13 + MOVQ R12, CX + SHLQ CL, R13 + MOVQ AX, 168(R10) + ORQ R13, R11 + + // exhausted += (br3.off < 4) + CMPQ AX, $0x04 + ADCB $+0, DL + +skip_fill3: + // val0 := br3.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v0 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br3.advance(uint8(v0.entry) + MOVB CH, AL + SHLQ CL, R11 + ADDB CL, R12 + + // val1 := br3.peekTopBits(peekBits) + MOVQ DI, CX + MOVQ R11, R13 + SHRQ CL, R13 + + // v1 := table[val1&mask] + MOVW (R9)(R13*2), CX + + // br3.advance(uint8(v1.entry)) + MOVB CH, AH + SHLQ CL, R11 + ADDB CL, R12 + + // these two writes get coalesced + // out[id * dstEvery + 0] = uint8(v0.entry >> 8) + // out[id * dstEvery + 1] = uint8(v1.entry >> 8) + LEAQ (R8)(R8*2), CX + MOVW AX, (BX)(CX*1) + + // update the bitreader structure + MOVQ R11, 176(R10) + MOVB R12, 184(R10) + ADDQ $0x02, BX + TESTB DL, DL + JZ main_loop + MOVQ ctx+0(FP), AX + SUBQ 16(AX), BX + SHLQ $0x02, BX + MOVQ BX, 40(AX) + RET + +// func decompress4x_8b_main_loop_amd64(ctx *decompress4xContext) +TEXT ·decompress4x_8b_main_loop_amd64(SB), $0-8 + // Preload values + MOVQ ctx+0(FP), CX + MOVBQZX 8(CX), DI + MOVQ 16(CX), BX + MOVQ 48(CX), SI + MOVQ 24(CX), R8 + MOVQ 32(CX), R9 + MOVQ (CX), R10 + + // Main loop +main_loop: + XORL DX, DX + CMPQ BX, SI + SETGE DL + + // br0.fillFast32() + MOVQ 32(R10), R11 + MOVBQZX 40(R10), R12 + CMPQ R12, $0x20 + JBE skip_fill0 + MOVQ 24(R10), R13 + SUBQ $0x20, R12 + SUBQ $0x04, R13 + MOVQ (R10), R14 + + // b.value |= uint64(low) << (b.bitsRead & 63) + MOVL (R13)(R14*1), R14 + MOVQ R12, CX + SHLQ CL, R14 + MOVQ R13, 24(R10) + ORQ R14, R11 + + // exhausted += (br0.off < 4) + CMPQ R13, $0x04 + ADCB $+0, DL + +skip_fill0: + // val0 := br0.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v0 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br0.advance(uint8(v0.entry) + MOVB CH, AL + SHLQ CL, R11 + ADDB CL, R12 + + // val1 := br0.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v1 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br0.advance(uint8(v1.entry) + MOVB CH, AH + SHLQ CL, R11 + ADDB CL, R12 + BSWAPL AX + + // val2 := br0.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v2 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br0.advance(uint8(v2.entry) + MOVB CH, AH + SHLQ CL, R11 + ADDB CL, R12 + + // val3 := br0.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v3 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br0.advance(uint8(v3.entry) + MOVB CH, AL + SHLQ CL, R11 + ADDB CL, R12 + BSWAPL AX + + // these four writes get coalesced + // out[id * dstEvery + 0] = uint8(v0.entry >> 8) + // out[id * dstEvery + 1] = uint8(v1.entry >> 8) + // out[id * dstEvery + 3] = uint8(v2.entry >> 8) + // out[id * dstEvery + 4] = uint8(v3.entry >> 8) + MOVL AX, (BX) + + // update the bitreader structure + MOVQ R11, 32(R10) + MOVB R12, 40(R10) + + // br1.fillFast32() + MOVQ 80(R10), R11 + MOVBQZX 88(R10), R12 + CMPQ R12, $0x20 + JBE skip_fill1 + MOVQ 72(R10), R13 + SUBQ $0x20, R12 + SUBQ $0x04, R13 + MOVQ 48(R10), R14 + + // b.value |= uint64(low) << (b.bitsRead & 63) + MOVL (R13)(R14*1), R14 + MOVQ R12, CX + SHLQ CL, R14 + MOVQ R13, 72(R10) + ORQ R14, R11 + + // exhausted += (br1.off < 4) + CMPQ R13, $0x04 + ADCB $+0, DL + +skip_fill1: + // val0 := br1.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v0 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br1.advance(uint8(v0.entry) + MOVB CH, AL + SHLQ CL, R11 + ADDB CL, R12 + + // val1 := br1.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v1 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br1.advance(uint8(v1.entry) + MOVB CH, AH + SHLQ CL, R11 + ADDB CL, R12 + BSWAPL AX + + // val2 := br1.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v2 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br1.advance(uint8(v2.entry) + MOVB CH, AH + SHLQ CL, R11 + ADDB CL, R12 + + // val3 := br1.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v3 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br1.advance(uint8(v3.entry) + MOVB CH, AL + SHLQ CL, R11 + ADDB CL, R12 + BSWAPL AX + + // these four writes get coalesced + // out[id * dstEvery + 0] = uint8(v0.entry >> 8) + // out[id * dstEvery + 1] = uint8(v1.entry >> 8) + // out[id * dstEvery + 3] = uint8(v2.entry >> 8) + // out[id * dstEvery + 4] = uint8(v3.entry >> 8) + MOVL AX, (BX)(R8*1) + + // update the bitreader structure + MOVQ R11, 80(R10) + MOVB R12, 88(R10) + + // br2.fillFast32() + MOVQ 128(R10), R11 + MOVBQZX 136(R10), R12 + CMPQ R12, $0x20 + JBE skip_fill2 + MOVQ 120(R10), R13 + SUBQ $0x20, R12 + SUBQ $0x04, R13 + MOVQ 96(R10), R14 + + // b.value |= uint64(low) << (b.bitsRead & 63) + MOVL (R13)(R14*1), R14 + MOVQ R12, CX + SHLQ CL, R14 + MOVQ R13, 120(R10) + ORQ R14, R11 + + // exhausted += (br2.off < 4) + CMPQ R13, $0x04 + ADCB $+0, DL + +skip_fill2: + // val0 := br2.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v0 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br2.advance(uint8(v0.entry) + MOVB CH, AL + SHLQ CL, R11 + ADDB CL, R12 + + // val1 := br2.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v1 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br2.advance(uint8(v1.entry) + MOVB CH, AH + SHLQ CL, R11 + ADDB CL, R12 + BSWAPL AX + + // val2 := br2.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v2 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br2.advance(uint8(v2.entry) + MOVB CH, AH + SHLQ CL, R11 + ADDB CL, R12 + + // val3 := br2.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v3 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br2.advance(uint8(v3.entry) + MOVB CH, AL + SHLQ CL, R11 + ADDB CL, R12 + BSWAPL AX + + // these four writes get coalesced + // out[id * dstEvery + 0] = uint8(v0.entry >> 8) + // out[id * dstEvery + 1] = uint8(v1.entry >> 8) + // out[id * dstEvery + 3] = uint8(v2.entry >> 8) + // out[id * dstEvery + 4] = uint8(v3.entry >> 8) + MOVL AX, (BX)(R8*2) + + // update the bitreader structure + MOVQ R11, 128(R10) + MOVB R12, 136(R10) + + // br3.fillFast32() + MOVQ 176(R10), R11 + MOVBQZX 184(R10), R12 + CMPQ R12, $0x20 + JBE skip_fill3 + MOVQ 168(R10), R13 + SUBQ $0x20, R12 + SUBQ $0x04, R13 + MOVQ 144(R10), R14 + + // b.value |= uint64(low) << (b.bitsRead & 63) + MOVL (R13)(R14*1), R14 + MOVQ R12, CX + SHLQ CL, R14 + MOVQ R13, 168(R10) + ORQ R14, R11 + + // exhausted += (br3.off < 4) + CMPQ R13, $0x04 + ADCB $+0, DL + +skip_fill3: + // val0 := br3.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v0 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br3.advance(uint8(v0.entry) + MOVB CH, AL + SHLQ CL, R11 + ADDB CL, R12 + + // val1 := br3.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v1 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br3.advance(uint8(v1.entry) + MOVB CH, AH + SHLQ CL, R11 + ADDB CL, R12 + BSWAPL AX + + // val2 := br3.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v2 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br3.advance(uint8(v2.entry) + MOVB CH, AH + SHLQ CL, R11 + ADDB CL, R12 + + // val3 := br3.peekTopBits(peekBits) + MOVQ R11, R13 + MOVQ DI, CX + SHRQ CL, R13 + + // v3 := table[val0&mask] + MOVW (R9)(R13*2), CX + + // br3.advance(uint8(v3.entry) + MOVB CH, AL + SHLQ CL, R11 + ADDB CL, R12 + BSWAPL AX + + // these four writes get coalesced + // out[id * dstEvery + 0] = uint8(v0.entry >> 8) + // out[id * dstEvery + 1] = uint8(v1.entry >> 8) + // out[id * dstEvery + 3] = uint8(v2.entry >> 8) + // out[id * dstEvery + 4] = uint8(v3.entry >> 8) + LEAQ (R8)(R8*2), CX + MOVL AX, (BX)(CX*1) + + // update the bitreader structure + MOVQ R11, 176(R10) + MOVB R12, 184(R10) + ADDQ $0x04, BX + TESTB DL, DL + JZ main_loop + MOVQ ctx+0(FP), AX + SUBQ 16(AX), BX + SHLQ $0x02, BX + MOVQ BX, 40(AX) + RET + +// func decompress1x_main_loop_amd64(ctx *decompress1xContext) +TEXT ·decompress1x_main_loop_amd64(SB), $0-8 + MOVQ ctx+0(FP), CX + MOVQ 16(CX), DX + MOVQ 24(CX), BX + CMPQ BX, $0x04 + JB error_max_decoded_size_exceeded + LEAQ (DX)(BX*1), BX + MOVQ (CX), SI + MOVQ (SI), R8 + MOVQ 24(SI), R9 + MOVQ 32(SI), R10 + MOVBQZX 40(SI), R11 + MOVQ 32(CX), SI + MOVBQZX 8(CX), DI + JMP loop_condition + +main_loop: + // Check if we have room for 4 bytes in the output buffer + LEAQ 4(DX), CX + CMPQ CX, BX + JGE error_max_decoded_size_exceeded + + // Decode 4 values + CMPQ R11, $0x20 + JL bitReader_fillFast_1_end + SUBQ $0x20, R11 + SUBQ $0x04, R9 + MOVL (R8)(R9*1), R12 + MOVQ R11, CX + SHLQ CL, R12 + ORQ R12, R10 + +bitReader_fillFast_1_end: + MOVQ DI, CX + MOVQ R10, R12 + SHRQ CL, R12 + MOVW (SI)(R12*2), CX + MOVB CH, AL + MOVBQZX CL, CX + ADDQ CX, R11 + SHLQ CL, R10 + MOVQ DI, CX + MOVQ R10, R12 + SHRQ CL, R12 + MOVW (SI)(R12*2), CX + MOVB CH, AH + MOVBQZX CL, CX + ADDQ CX, R11 + SHLQ CL, R10 + BSWAPL AX + CMPQ R11, $0x20 + JL bitReader_fillFast_2_end + SUBQ $0x20, R11 + SUBQ $0x04, R9 + MOVL (R8)(R9*1), R12 + MOVQ R11, CX + SHLQ CL, R12 + ORQ R12, R10 + +bitReader_fillFast_2_end: + MOVQ DI, CX + MOVQ R10, R12 + SHRQ CL, R12 + MOVW (SI)(R12*2), CX + MOVB CH, AH + MOVBQZX CL, CX + ADDQ CX, R11 + SHLQ CL, R10 + MOVQ DI, CX + MOVQ R10, R12 + SHRQ CL, R12 + MOVW (SI)(R12*2), CX + MOVB CH, AL + MOVBQZX CL, CX + ADDQ CX, R11 + SHLQ CL, R10 + BSWAPL AX + + // Store the decoded values + MOVL AX, (DX) + ADDQ $0x04, DX + +loop_condition: + CMPQ R9, $0x08 + JGE main_loop + + // Update ctx structure + MOVQ ctx+0(FP), AX + SUBQ 16(AX), DX + MOVQ DX, 40(AX) + MOVQ (AX), AX + MOVQ R9, 24(AX) + MOVQ R10, 32(AX) + MOVB R11, 40(AX) + RET + + // Report error +error_max_decoded_size_exceeded: + MOVQ ctx+0(FP), AX + MOVQ $-1, CX + MOVQ CX, 40(AX) + RET + +// func decompress1x_main_loop_bmi2(ctx *decompress1xContext) +// Requires: BMI2 +TEXT ·decompress1x_main_loop_bmi2(SB), $0-8 + MOVQ ctx+0(FP), CX + MOVQ 16(CX), DX + MOVQ 24(CX), BX + CMPQ BX, $0x04 + JB error_max_decoded_size_exceeded + LEAQ (DX)(BX*1), BX + MOVQ (CX), SI + MOVQ (SI), R8 + MOVQ 24(SI), R9 + MOVQ 32(SI), R10 + MOVBQZX 40(SI), R11 + MOVQ 32(CX), SI + MOVBQZX 8(CX), DI + JMP loop_condition + +main_loop: + // Check if we have room for 4 bytes in the output buffer + LEAQ 4(DX), CX + CMPQ CX, BX + JGE error_max_decoded_size_exceeded + + // Decode 4 values + CMPQ R11, $0x20 + JL bitReader_fillFast_1_end + SUBQ $0x20, R11 + SUBQ $0x04, R9 + MOVL (R8)(R9*1), CX + SHLXQ R11, CX, CX + ORQ CX, R10 + +bitReader_fillFast_1_end: + SHRXQ DI, R10, CX + MOVW (SI)(CX*2), CX + MOVB CH, AL + MOVBQZX CL, CX + ADDQ CX, R11 + SHLXQ CX, R10, R10 + SHRXQ DI, R10, CX + MOVW (SI)(CX*2), CX + MOVB CH, AH + MOVBQZX CL, CX + ADDQ CX, R11 + SHLXQ CX, R10, R10 + BSWAPL AX + CMPQ R11, $0x20 + JL bitReader_fillFast_2_end + SUBQ $0x20, R11 + SUBQ $0x04, R9 + MOVL (R8)(R9*1), CX + SHLXQ R11, CX, CX + ORQ CX, R10 + +bitReader_fillFast_2_end: + SHRXQ DI, R10, CX + MOVW (SI)(CX*2), CX + MOVB CH, AH + MOVBQZX CL, CX + ADDQ CX, R11 + SHLXQ CX, R10, R10 + SHRXQ DI, R10, CX + MOVW (SI)(CX*2), CX + MOVB CH, AL + MOVBQZX CL, CX + ADDQ CX, R11 + SHLXQ CX, R10, R10 + BSWAPL AX + + // Store the decoded values + MOVL AX, (DX) + ADDQ $0x04, DX + +loop_condition: + CMPQ R9, $0x08 + JGE main_loop + + // Update ctx structure + MOVQ ctx+0(FP), AX + SUBQ 16(AX), DX + MOVQ DX, 40(AX) + MOVQ (AX), AX + MOVQ R9, 24(AX) + MOVQ R10, 32(AX) + MOVB R11, 40(AX) + RET + + // Report error +error_max_decoded_size_exceeded: + MOVQ ctx+0(FP), AX + MOVQ $-1, CX + MOVQ CX, 40(AX) + RET diff --git a/backend/vendor/github.com/klauspost/compress/huff0/decompress_generic.go b/backend/vendor/github.com/klauspost/compress/huff0/decompress_generic.go new file mode 100644 index 0000000..908c17d --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/huff0/decompress_generic.go @@ -0,0 +1,299 @@ +//go:build !amd64 || appengine || !gc || noasm +// +build !amd64 appengine !gc noasm + +// This file contains a generic implementation of Decoder.Decompress4X. +package huff0 + +import ( + "errors" + "fmt" +) + +// Decompress4X will decompress a 4X encoded stream. +// The length of the supplied input must match the end of a block exactly. +// The *capacity* of the dst slice must match the destination size of +// the uncompressed data exactly. +func (d *Decoder) Decompress4X(dst, src []byte) ([]byte, error) { + if len(d.dt.single) == 0 { + return nil, errors.New("no table loaded") + } + if len(src) < 6+(4*1) { + return nil, errors.New("input too small") + } + if use8BitTables && d.actualTableLog <= 8 { + return d.decompress4X8bit(dst, src) + } + + var br [4]bitReaderShifted + // Decode "jump table" + start := 6 + for i := 0; i < 3; i++ { + length := int(src[i*2]) | (int(src[i*2+1]) << 8) + if start+length >= len(src) { + return nil, errors.New("truncated input (or invalid offset)") + } + err := br[i].init(src[start : start+length]) + if err != nil { + return nil, err + } + start += length + } + err := br[3].init(src[start:]) + if err != nil { + return nil, err + } + + // destination, offset to match first output + dstSize := cap(dst) + dst = dst[:dstSize] + out := dst + dstEvery := (dstSize + 3) / 4 + + const tlSize = 1 << tableLogMax + const tlMask = tlSize - 1 + single := d.dt.single[:tlSize] + + // Use temp table to avoid bound checks/append penalty. + buf := d.buffer() + var off uint8 + var decoded int + + // Decode 2 values from each decoder/loop. + const bufoff = 256 + for { + if br[0].off < 4 || br[1].off < 4 || br[2].off < 4 || br[3].off < 4 { + break + } + + { + const stream = 0 + const stream2 = 1 + br[stream].fillFast() + br[stream2].fillFast() + + val := br[stream].peekBitsFast(d.actualTableLog) + val2 := br[stream2].peekBitsFast(d.actualTableLog) + v := single[val&tlMask] + v2 := single[val2&tlMask] + br[stream].advance(uint8(v.entry)) + br[stream2].advance(uint8(v2.entry)) + buf[stream][off] = uint8(v.entry >> 8) + buf[stream2][off] = uint8(v2.entry >> 8) + + val = br[stream].peekBitsFast(d.actualTableLog) + val2 = br[stream2].peekBitsFast(d.actualTableLog) + v = single[val&tlMask] + v2 = single[val2&tlMask] + br[stream].advance(uint8(v.entry)) + br[stream2].advance(uint8(v2.entry)) + buf[stream][off+1] = uint8(v.entry >> 8) + buf[stream2][off+1] = uint8(v2.entry >> 8) + } + + { + const stream = 2 + const stream2 = 3 + br[stream].fillFast() + br[stream2].fillFast() + + val := br[stream].peekBitsFast(d.actualTableLog) + val2 := br[stream2].peekBitsFast(d.actualTableLog) + v := single[val&tlMask] + v2 := single[val2&tlMask] + br[stream].advance(uint8(v.entry)) + br[stream2].advance(uint8(v2.entry)) + buf[stream][off] = uint8(v.entry >> 8) + buf[stream2][off] = uint8(v2.entry >> 8) + + val = br[stream].peekBitsFast(d.actualTableLog) + val2 = br[stream2].peekBitsFast(d.actualTableLog) + v = single[val&tlMask] + v2 = single[val2&tlMask] + br[stream].advance(uint8(v.entry)) + br[stream2].advance(uint8(v2.entry)) + buf[stream][off+1] = uint8(v.entry >> 8) + buf[stream2][off+1] = uint8(v2.entry >> 8) + } + + off += 2 + + if off == 0 { + if bufoff > dstEvery { + d.bufs.Put(buf) + return nil, errors.New("corruption detected: stream overrun 1") + } + // There must at least be 3 buffers left. + if len(out)-bufoff < dstEvery*3 { + d.bufs.Put(buf) + return nil, errors.New("corruption detected: stream overrun 2") + } + //copy(out, buf[0][:]) + //copy(out[dstEvery:], buf[1][:]) + //copy(out[dstEvery*2:], buf[2][:]) + //copy(out[dstEvery*3:], buf[3][:]) + *(*[bufoff]byte)(out) = buf[0] + *(*[bufoff]byte)(out[dstEvery:]) = buf[1] + *(*[bufoff]byte)(out[dstEvery*2:]) = buf[2] + *(*[bufoff]byte)(out[dstEvery*3:]) = buf[3] + out = out[bufoff:] + decoded += bufoff * 4 + } + } + if off > 0 { + ioff := int(off) + if len(out) < dstEvery*3+ioff { + d.bufs.Put(buf) + return nil, errors.New("corruption detected: stream overrun 3") + } + copy(out, buf[0][:off]) + copy(out[dstEvery:], buf[1][:off]) + copy(out[dstEvery*2:], buf[2][:off]) + copy(out[dstEvery*3:], buf[3][:off]) + decoded += int(off) * 4 + out = out[off:] + } + + // Decode remaining. + remainBytes := dstEvery - (decoded / 4) + for i := range br { + offset := dstEvery * i + endsAt := offset + remainBytes + if endsAt > len(out) { + endsAt = len(out) + } + br := &br[i] + bitsLeft := br.remaining() + for bitsLeft > 0 { + br.fill() + if offset >= endsAt { + d.bufs.Put(buf) + return nil, errors.New("corruption detected: stream overrun 4") + } + + // Read value and increment offset. + val := br.peekBitsFast(d.actualTableLog) + v := single[val&tlMask].entry + nBits := uint8(v) + br.advance(nBits) + bitsLeft -= uint(nBits) + out[offset] = uint8(v >> 8) + offset++ + } + if offset != endsAt { + d.bufs.Put(buf) + return nil, fmt.Errorf("corruption detected: short output block %d, end %d != %d", i, offset, endsAt) + } + decoded += offset - dstEvery*i + err = br.close() + if err != nil { + return nil, err + } + } + d.bufs.Put(buf) + if dstSize != decoded { + return nil, errors.New("corruption detected: short output block") + } + return dst, nil +} + +// Decompress1X will decompress a 1X encoded stream. +// The cap of the output buffer will be the maximum decompressed size. +// The length of the supplied input must match the end of a block exactly. +func (d *Decoder) Decompress1X(dst, src []byte) ([]byte, error) { + if len(d.dt.single) == 0 { + return nil, errors.New("no table loaded") + } + if use8BitTables && d.actualTableLog <= 8 { + return d.decompress1X8Bit(dst, src) + } + var br bitReaderShifted + err := br.init(src) + if err != nil { + return dst, err + } + maxDecodedSize := cap(dst) + dst = dst[:0] + + // Avoid bounds check by always having full sized table. + const tlSize = 1 << tableLogMax + const tlMask = tlSize - 1 + dt := d.dt.single[:tlSize] + + // Use temp table to avoid bound checks/append penalty. + bufs := d.buffer() + buf := &bufs[0] + var off uint8 + + for br.off >= 8 { + br.fillFast() + v := dt[br.peekBitsFast(d.actualTableLog)&tlMask] + br.advance(uint8(v.entry)) + buf[off+0] = uint8(v.entry >> 8) + + v = dt[br.peekBitsFast(d.actualTableLog)&tlMask] + br.advance(uint8(v.entry)) + buf[off+1] = uint8(v.entry >> 8) + + // Refill + br.fillFast() + + v = dt[br.peekBitsFast(d.actualTableLog)&tlMask] + br.advance(uint8(v.entry)) + buf[off+2] = uint8(v.entry >> 8) + + v = dt[br.peekBitsFast(d.actualTableLog)&tlMask] + br.advance(uint8(v.entry)) + buf[off+3] = uint8(v.entry >> 8) + + off += 4 + if off == 0 { + if len(dst)+256 > maxDecodedSize { + br.close() + d.bufs.Put(bufs) + return nil, ErrMaxDecodedSizeExceeded + } + dst = append(dst, buf[:]...) + } + } + + if len(dst)+int(off) > maxDecodedSize { + d.bufs.Put(bufs) + br.close() + return nil, ErrMaxDecodedSizeExceeded + } + dst = append(dst, buf[:off]...) + + // br < 8, so uint8 is fine + bitsLeft := uint8(br.off)*8 + 64 - br.bitsRead + for bitsLeft > 0 { + br.fill() + if false && br.bitsRead >= 32 { + if br.off >= 4 { + v := br.in[br.off-4:] + v = v[:4] + low := (uint32(v[0])) | (uint32(v[1]) << 8) | (uint32(v[2]) << 16) | (uint32(v[3]) << 24) + br.value = (br.value << 32) | uint64(low) + br.bitsRead -= 32 + br.off -= 4 + } else { + for br.off > 0 { + br.value = (br.value << 8) | uint64(br.in[br.off-1]) + br.bitsRead -= 8 + br.off-- + } + } + } + if len(dst) >= maxDecodedSize { + d.bufs.Put(bufs) + br.close() + return nil, ErrMaxDecodedSizeExceeded + } + v := d.dt.single[br.peekBitsFast(d.actualTableLog)&tlMask] + nBits := uint8(v.entry) + br.advance(nBits) + bitsLeft -= nBits + dst = append(dst, uint8(v.entry>>8)) + } + d.bufs.Put(bufs) + return dst, br.close() +} diff --git a/backend/vendor/github.com/klauspost/compress/huff0/huff0.go b/backend/vendor/github.com/klauspost/compress/huff0/huff0.go new file mode 100644 index 0000000..67d9e05 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/huff0/huff0.go @@ -0,0 +1,337 @@ +// Package huff0 provides fast huffman encoding as used in zstd. +// +// See README.md at https://github.com/klauspost/compress/tree/master/huff0 for details. +package huff0 + +import ( + "errors" + "fmt" + "math" + "math/bits" + "sync" + + "github.com/klauspost/compress/fse" +) + +const ( + maxSymbolValue = 255 + + // zstandard limits tablelog to 11, see: + // https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#huffman-tree-description + tableLogMax = 11 + tableLogDefault = 11 + minTablelog = 5 + huffNodesLen = 512 + + // BlockSizeMax is maximum input size for a single block uncompressed. + BlockSizeMax = 1<<18 - 1 +) + +var ( + // ErrIncompressible is returned when input is judged to be too hard to compress. + ErrIncompressible = errors.New("input is not compressible") + + // ErrUseRLE is returned from the compressor when the input is a single byte value repeated. + ErrUseRLE = errors.New("input is single value repeated") + + // ErrTooBig is return if input is too large for a single block. + ErrTooBig = errors.New("input too big") + + // ErrMaxDecodedSizeExceeded is return if input is too large for a single block. + ErrMaxDecodedSizeExceeded = errors.New("maximum output size exceeded") +) + +type ReusePolicy uint8 + +const ( + // ReusePolicyAllow will allow reuse if it produces smaller output. + ReusePolicyAllow ReusePolicy = iota + + // ReusePolicyPrefer will re-use aggressively if possible. + // This will not check if a new table will produce smaller output, + // except if the current table is impossible to use or + // compressed output is bigger than input. + ReusePolicyPrefer + + // ReusePolicyNone will disable re-use of tables. + // This is slightly faster than ReusePolicyAllow but may produce larger output. + ReusePolicyNone + + // ReusePolicyMust must allow reuse and produce smaller output. + ReusePolicyMust +) + +type Scratch struct { + count [maxSymbolValue + 1]uint32 + + // Per block parameters. + // These can be used to override compression parameters of the block. + // Do not touch, unless you know what you are doing. + + // Out is output buffer. + // If the scratch is re-used before the caller is done processing the output, + // set this field to nil. + // Otherwise the output buffer will be re-used for next Compression/Decompression step + // and allocation will be avoided. + Out []byte + + // OutTable will contain the table data only, if a new table has been generated. + // Slice of the returned data. + OutTable []byte + + // OutData will contain the compressed data. + // Slice of the returned data. + OutData []byte + + // MaxDecodedSize will set the maximum allowed output size. + // This value will automatically be set to BlockSizeMax if not set. + // Decoders will return ErrMaxDecodedSizeExceeded is this limit is exceeded. + MaxDecodedSize int + + srcLen int + + // MaxSymbolValue will override the maximum symbol value of the next block. + MaxSymbolValue uint8 + + // TableLog will attempt to override the tablelog for the next block. + // Must be <= 11 and >= 5. + TableLog uint8 + + // Reuse will specify the reuse policy + Reuse ReusePolicy + + // WantLogLess allows to specify a log 2 reduction that should at least be achieved, + // otherwise the block will be returned as incompressible. + // The reduction should then at least be (input size >> WantLogLess) + // If WantLogLess == 0 any improvement will do. + WantLogLess uint8 + + symbolLen uint16 // Length of active part of the symbol table. + maxCount int // count of the most probable symbol + clearCount bool // clear count + actualTableLog uint8 // Selected tablelog. + prevTableLog uint8 // Tablelog for previous table + prevTable cTable // Table used for previous compression. + cTable cTable // compression table + dt dTable // decompression table + nodes []nodeElt + tmpOut [4][]byte + fse *fse.Scratch + decPool sync.Pool // *[4][256]byte buffers. + huffWeight [maxSymbolValue + 1]byte +} + +// TransferCTable will transfer the previously used compression table. +func (s *Scratch) TransferCTable(src *Scratch) { + if cap(s.prevTable) < len(src.prevTable) { + s.prevTable = make(cTable, 0, maxSymbolValue+1) + } + s.prevTable = s.prevTable[:len(src.prevTable)] + copy(s.prevTable, src.prevTable) + s.prevTableLog = src.prevTableLog +} + +func (s *Scratch) prepare(in []byte) (*Scratch, error) { + if len(in) > BlockSizeMax { + return nil, ErrTooBig + } + if s == nil { + s = &Scratch{} + } + if s.MaxSymbolValue == 0 { + s.MaxSymbolValue = maxSymbolValue + } + if s.TableLog == 0 { + s.TableLog = tableLogDefault + } + if s.TableLog > tableLogMax || s.TableLog < minTablelog { + return nil, fmt.Errorf(" invalid tableLog %d (%d -> %d)", s.TableLog, minTablelog, tableLogMax) + } + if s.MaxDecodedSize <= 0 || s.MaxDecodedSize > BlockSizeMax { + s.MaxDecodedSize = BlockSizeMax + } + if s.clearCount && s.maxCount == 0 { + for i := range s.count { + s.count[i] = 0 + } + s.clearCount = false + } + if cap(s.Out) == 0 { + s.Out = make([]byte, 0, len(in)) + } + s.Out = s.Out[:0] + + s.OutTable = nil + s.OutData = nil + if cap(s.nodes) < huffNodesLen+1 { + s.nodes = make([]nodeElt, 0, huffNodesLen+1) + } + s.nodes = s.nodes[:0] + if s.fse == nil { + s.fse = &fse.Scratch{} + } + s.srcLen = len(in) + + return s, nil +} + +type cTable []cTableEntry + +func (c cTable) write(s *Scratch) error { + var ( + // precomputed conversion table + bitsToWeight [tableLogMax + 1]byte + huffLog = s.actualTableLog + // last weight is not saved. + maxSymbolValue = uint8(s.symbolLen - 1) + huffWeight = s.huffWeight[:256] + ) + const ( + maxFSETableLog = 6 + ) + // convert to weight + bitsToWeight[0] = 0 + for n := uint8(1); n < huffLog+1; n++ { + bitsToWeight[n] = huffLog + 1 - n + } + + // Acquire histogram for FSE. + hist := s.fse.Histogram() + hist = hist[:256] + for i := range hist[:16] { + hist[i] = 0 + } + for n := range maxSymbolValue { + v := bitsToWeight[c[n].nBits] & 15 + huffWeight[n] = v + hist[v]++ + } + + // FSE compress if feasible. + if maxSymbolValue >= 2 { + huffMaxCnt := uint32(0) + huffMax := uint8(0) + for i, v := range hist[:16] { + if v == 0 { + continue + } + huffMax = byte(i) + if v > huffMaxCnt { + huffMaxCnt = v + } + } + s.fse.HistogramFinished(huffMax, int(huffMaxCnt)) + s.fse.TableLog = maxFSETableLog + b, err := fse.Compress(huffWeight[:maxSymbolValue], s.fse) + if err == nil && len(b) < int(s.symbolLen>>1) { + s.Out = append(s.Out, uint8(len(b))) + s.Out = append(s.Out, b...) + return nil + } + // Unable to compress (RLE/uncompressible) + } + // write raw values as 4-bits (max : 15) + if maxSymbolValue > (256 - 128) { + // should not happen : likely means source cannot be compressed + return ErrIncompressible + } + op := s.Out + // special case, pack weights 4 bits/weight. + op = append(op, 128|(maxSymbolValue-1)) + // be sure it doesn't cause msan issue in final combination + huffWeight[maxSymbolValue] = 0 + for n := uint16(0); n < uint16(maxSymbolValue); n += 2 { + op = append(op, (huffWeight[n]<<4)|huffWeight[n+1]) + } + s.Out = op + return nil +} + +func (c cTable) estTableSize(s *Scratch) (sz int, err error) { + var ( + // precomputed conversion table + bitsToWeight [tableLogMax + 1]byte + huffLog = s.actualTableLog + // last weight is not saved. + maxSymbolValue = uint8(s.symbolLen - 1) + huffWeight = s.huffWeight[:256] + ) + const ( + maxFSETableLog = 6 + ) + // convert to weight + bitsToWeight[0] = 0 + for n := uint8(1); n < huffLog+1; n++ { + bitsToWeight[n] = huffLog + 1 - n + } + + // Acquire histogram for FSE. + hist := s.fse.Histogram() + hist = hist[:256] + for i := range hist[:16] { + hist[i] = 0 + } + for n := range maxSymbolValue { + v := bitsToWeight[c[n].nBits] & 15 + huffWeight[n] = v + hist[v]++ + } + + // FSE compress if feasible. + if maxSymbolValue >= 2 { + huffMaxCnt := uint32(0) + huffMax := uint8(0) + for i, v := range hist[:16] { + if v == 0 { + continue + } + huffMax = byte(i) + if v > huffMaxCnt { + huffMaxCnt = v + } + } + s.fse.HistogramFinished(huffMax, int(huffMaxCnt)) + s.fse.TableLog = maxFSETableLog + b, err := fse.Compress(huffWeight[:maxSymbolValue], s.fse) + if err == nil && len(b) < int(s.symbolLen>>1) { + sz += 1 + len(b) + return sz, nil + } + // Unable to compress (RLE/uncompressible) + } + // write raw values as 4-bits (max : 15) + if maxSymbolValue > (256 - 128) { + // should not happen : likely means source cannot be compressed + return 0, ErrIncompressible + } + // special case, pack weights 4 bits/weight. + sz += 1 + int(maxSymbolValue/2) + return sz, nil +} + +// estimateSize returns the estimated size in bytes of the input represented in the +// histogram supplied. +func (c cTable) estimateSize(hist []uint32) int { + nbBits := uint32(7) + for i, v := range c[:len(hist)] { + nbBits += uint32(v.nBits) * hist[i] + } + return int(nbBits >> 3) +} + +// minSize returns the minimum possible size considering the shannon limit. +func (s *Scratch) minSize(total int) int { + nbBits := float64(7) + fTotal := float64(total) + for _, v := range s.count[:s.symbolLen] { + n := float64(v) + if n > 0 { + nbBits += math.Log2(fTotal/n) * n + } + } + return int(nbBits) >> 3 +} + +func highBit32(val uint32) (n uint32) { + return uint32(bits.Len32(val) - 1) +} diff --git a/backend/vendor/github.com/klauspost/compress/internal/cpuinfo/cpuinfo.go b/backend/vendor/github.com/klauspost/compress/internal/cpuinfo/cpuinfo.go new file mode 100644 index 0000000..3954c51 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/internal/cpuinfo/cpuinfo.go @@ -0,0 +1,34 @@ +// Package cpuinfo gives runtime info about the current CPU. +// +// This is a very limited module meant for use internally +// in this project. For more versatile solution check +// https://github.com/klauspost/cpuid. +package cpuinfo + +// HasBMI1 checks whether an x86 CPU supports the BMI1 extension. +func HasBMI1() bool { + return hasBMI1 +} + +// HasBMI2 checks whether an x86 CPU supports the BMI2 extension. +func HasBMI2() bool { + return hasBMI2 +} + +// DisableBMI2 will disable BMI2, for testing purposes. +// Call returned function to restore previous state. +func DisableBMI2() func() { + old := hasBMI2 + hasBMI2 = false + return func() { + hasBMI2 = old + } +} + +// HasBMI checks whether an x86 CPU supports both BMI1 and BMI2 extensions. +func HasBMI() bool { + return HasBMI1() && HasBMI2() +} + +var hasBMI1 bool +var hasBMI2 bool diff --git a/backend/vendor/github.com/klauspost/compress/internal/cpuinfo/cpuinfo_amd64.go b/backend/vendor/github.com/klauspost/compress/internal/cpuinfo/cpuinfo_amd64.go new file mode 100644 index 0000000..e802579 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/internal/cpuinfo/cpuinfo_amd64.go @@ -0,0 +1,11 @@ +//go:build amd64 && !appengine && !noasm && gc +// +build amd64,!appengine,!noasm,gc + +package cpuinfo + +// go:noescape +func x86extensions() (bmi1, bmi2 bool) + +func init() { + hasBMI1, hasBMI2 = x86extensions() +} diff --git a/backend/vendor/github.com/klauspost/compress/internal/cpuinfo/cpuinfo_amd64.s b/backend/vendor/github.com/klauspost/compress/internal/cpuinfo/cpuinfo_amd64.s new file mode 100644 index 0000000..4465fbe --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/internal/cpuinfo/cpuinfo_amd64.s @@ -0,0 +1,36 @@ +// +build !appengine +// +build gc +// +build !noasm + +#include "textflag.h" +#include "funcdata.h" +#include "go_asm.h" + +TEXT ·x86extensions(SB), NOSPLIT, $0 + // 1. determine max EAX value + XORQ AX, AX + CPUID + + CMPQ AX, $7 + JB unsupported + + // 2. EAX = 7, ECX = 0 --- see Table 3-8 "Information Returned by CPUID Instruction" + MOVQ $7, AX + MOVQ $0, CX + CPUID + + BTQ $3, BX // bit 3 = BMI1 + SETCS AL + + BTQ $8, BX // bit 8 = BMI2 + SETCS AH + + MOVB AL, bmi1+0(FP) + MOVB AH, bmi2+1(FP) + RET + +unsupported: + XORQ AX, AX + MOVB AL, bmi1+0(FP) + MOVB AL, bmi2+1(FP) + RET diff --git a/backend/vendor/github.com/klauspost/compress/internal/le/le.go b/backend/vendor/github.com/klauspost/compress/internal/le/le.go new file mode 100644 index 0000000..e54909e --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/internal/le/le.go @@ -0,0 +1,5 @@ +package le + +type Indexer interface { + int | int8 | int16 | int32 | int64 | uint | uint8 | uint16 | uint32 | uint64 +} diff --git a/backend/vendor/github.com/klauspost/compress/internal/le/unsafe_disabled.go b/backend/vendor/github.com/klauspost/compress/internal/le/unsafe_disabled.go new file mode 100644 index 0000000..4f2a0d8 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/internal/le/unsafe_disabled.go @@ -0,0 +1,42 @@ +//go:build !(amd64 || arm64 || ppc64le || riscv64) || nounsafe || purego || appengine + +package le + +import ( + "encoding/binary" +) + +// Load8 will load from b at index i. +func Load8[I Indexer](b []byte, i I) byte { + return b[i] +} + +// Load16 will load from b at index i. +func Load16[I Indexer](b []byte, i I) uint16 { + return binary.LittleEndian.Uint16(b[i:]) +} + +// Load32 will load from b at index i. +func Load32[I Indexer](b []byte, i I) uint32 { + return binary.LittleEndian.Uint32(b[i:]) +} + +// Load64 will load from b at index i. +func Load64[I Indexer](b []byte, i I) uint64 { + return binary.LittleEndian.Uint64(b[i:]) +} + +// Store16 will store v at b. +func Store16(b []byte, v uint16) { + binary.LittleEndian.PutUint16(b, v) +} + +// Store32 will store v at b. +func Store32(b []byte, v uint32) { + binary.LittleEndian.PutUint32(b, v) +} + +// Store64 will store v at b. +func Store64[I Indexer](b []byte, i I, v uint64) { + binary.LittleEndian.PutUint64(b[i:], v) +} diff --git a/backend/vendor/github.com/klauspost/compress/internal/le/unsafe_enabled.go b/backend/vendor/github.com/klauspost/compress/internal/le/unsafe_enabled.go new file mode 100644 index 0000000..218a38b --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/internal/le/unsafe_enabled.go @@ -0,0 +1,52 @@ +// We enable 64 bit LE platforms: + +//go:build (amd64 || arm64 || ppc64le || riscv64) && !nounsafe && !purego && !appengine + +package le + +import ( + "unsafe" +) + +// Load8 will load from b at index i. +func Load8[I Indexer](b []byte, i I) byte { + //return binary.LittleEndian.Uint16(b[i:]) + //return *(*uint16)(unsafe.Pointer(&b[i])) + return *(*byte)(unsafe.Add(unsafe.Pointer(unsafe.SliceData(b)), i)) +} + +// Load16 will load from b at index i. +func Load16[I Indexer](b []byte, i I) uint16 { + //return binary.LittleEndian.Uint16(b[i:]) + //return *(*uint16)(unsafe.Pointer(&b[i])) + return *(*uint16)(unsafe.Add(unsafe.Pointer(unsafe.SliceData(b)), i)) +} + +// Load32 will load from b at index i. +func Load32[I Indexer](b []byte, i I) uint32 { + //return binary.LittleEndian.Uint32(b[i:]) + //return *(*uint32)(unsafe.Pointer(&b[i])) + return *(*uint32)(unsafe.Add(unsafe.Pointer(unsafe.SliceData(b)), i)) +} + +// Load64 will load from b at index i. +func Load64[I Indexer](b []byte, i I) uint64 { + //return binary.LittleEndian.Uint64(b[i:]) + //return *(*uint64)(unsafe.Pointer(&b[i])) + return *(*uint64)(unsafe.Add(unsafe.Pointer(unsafe.SliceData(b)), i)) +} + +// Store16 will store v at b. +func Store16(b []byte, v uint16) { + *(*uint16)(unsafe.Pointer(unsafe.SliceData(b))) = v +} + +// Store32 will store v at b. +func Store32(b []byte, v uint32) { + *(*uint32)(unsafe.Pointer(unsafe.SliceData(b))) = v +} + +// Store64 will store v at b[i:]. +func Store64[I Indexer](b []byte, i I, v uint64) { + *(*uint64)(unsafe.Add(unsafe.Pointer(unsafe.SliceData(b)), i)) = v +} diff --git a/backend/vendor/github.com/klauspost/compress/internal/snapref/LICENSE b/backend/vendor/github.com/klauspost/compress/internal/snapref/LICENSE new file mode 100644 index 0000000..6050c10 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/internal/snapref/LICENSE @@ -0,0 +1,27 @@ +Copyright (c) 2011 The Snappy-Go Authors. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/backend/vendor/github.com/klauspost/compress/internal/snapref/decode.go b/backend/vendor/github.com/klauspost/compress/internal/snapref/decode.go new file mode 100644 index 0000000..a2c82fc --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/internal/snapref/decode.go @@ -0,0 +1,264 @@ +// Copyright 2011 The Snappy-Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package snapref + +import ( + "encoding/binary" + "errors" + "io" +) + +var ( + // ErrCorrupt reports that the input is invalid. + ErrCorrupt = errors.New("snappy: corrupt input") + // ErrTooLarge reports that the uncompressed length is too large. + ErrTooLarge = errors.New("snappy: decoded block is too large") + // ErrUnsupported reports that the input isn't supported. + ErrUnsupported = errors.New("snappy: unsupported input") + + errUnsupportedLiteralLength = errors.New("snappy: unsupported literal length") +) + +// DecodedLen returns the length of the decoded block. +func DecodedLen(src []byte) (int, error) { + v, _, err := decodedLen(src) + return v, err +} + +// decodedLen returns the length of the decoded block and the number of bytes +// that the length header occupied. +func decodedLen(src []byte) (blockLen, headerLen int, err error) { + v, n := binary.Uvarint(src) + if n <= 0 || v > 0xffffffff { + return 0, 0, ErrCorrupt + } + + const wordSize = 32 << (^uint(0) >> 32 & 1) + if wordSize == 32 && v > 0x7fffffff { + return 0, 0, ErrTooLarge + } + return int(v), n, nil +} + +const ( + decodeErrCodeCorrupt = 1 + decodeErrCodeUnsupportedLiteralLength = 2 +) + +// Decode returns the decoded form of src. The returned slice may be a sub- +// slice of dst if dst was large enough to hold the entire decoded block. +// Otherwise, a newly allocated slice will be returned. +// +// The dst and src must not overlap. It is valid to pass a nil dst. +// +// Decode handles the Snappy block format, not the Snappy stream format. +func Decode(dst, src []byte) ([]byte, error) { + dLen, s, err := decodedLen(src) + if err != nil { + return nil, err + } + if dLen <= len(dst) { + dst = dst[:dLen] + } else { + dst = make([]byte, dLen) + } + switch decode(dst, src[s:]) { + case 0: + return dst, nil + case decodeErrCodeUnsupportedLiteralLength: + return nil, errUnsupportedLiteralLength + } + return nil, ErrCorrupt +} + +// NewReader returns a new Reader that decompresses from r, using the framing +// format described at +// https://github.com/google/snappy/blob/master/framing_format.txt +func NewReader(r io.Reader) *Reader { + return &Reader{ + r: r, + decoded: make([]byte, maxBlockSize), + buf: make([]byte, maxEncodedLenOfMaxBlockSize+checksumSize), + } +} + +// Reader is an io.Reader that can read Snappy-compressed bytes. +// +// Reader handles the Snappy stream format, not the Snappy block format. +type Reader struct { + r io.Reader + err error + decoded []byte + buf []byte + // decoded[i:j] contains decoded bytes that have not yet been passed on. + i, j int + readHeader bool +} + +// Reset discards any buffered data, resets all state, and switches the Snappy +// reader to read from r. This permits reusing a Reader rather than allocating +// a new one. +func (r *Reader) Reset(reader io.Reader) { + r.r = reader + r.err = nil + r.i = 0 + r.j = 0 + r.readHeader = false +} + +func (r *Reader) readFull(p []byte, allowEOF bool) (ok bool) { + if _, r.err = io.ReadFull(r.r, p); r.err != nil { + if r.err == io.ErrUnexpectedEOF || (r.err == io.EOF && !allowEOF) { + r.err = ErrCorrupt + } + return false + } + return true +} + +func (r *Reader) fill() error { + for r.i >= r.j { + if !r.readFull(r.buf[:4], true) { + return r.err + } + chunkType := r.buf[0] + if !r.readHeader { + if chunkType != chunkTypeStreamIdentifier { + r.err = ErrCorrupt + return r.err + } + r.readHeader = true + } + chunkLen := int(r.buf[1]) | int(r.buf[2])<<8 | int(r.buf[3])<<16 + if chunkLen > len(r.buf) { + r.err = ErrUnsupported + return r.err + } + + // The chunk types are specified at + // https://github.com/google/snappy/blob/master/framing_format.txt + switch chunkType { + case chunkTypeCompressedData: + // Section 4.2. Compressed data (chunk type 0x00). + if chunkLen < checksumSize { + r.err = ErrCorrupt + return r.err + } + buf := r.buf[:chunkLen] + if !r.readFull(buf, false) { + return r.err + } + checksum := uint32(buf[0]) | uint32(buf[1])<<8 | uint32(buf[2])<<16 | uint32(buf[3])<<24 + buf = buf[checksumSize:] + + n, err := DecodedLen(buf) + if err != nil { + r.err = err + return r.err + } + if n > len(r.decoded) { + r.err = ErrCorrupt + return r.err + } + if _, err := Decode(r.decoded, buf); err != nil { + r.err = err + return r.err + } + if crc(r.decoded[:n]) != checksum { + r.err = ErrCorrupt + return r.err + } + r.i, r.j = 0, n + continue + + case chunkTypeUncompressedData: + // Section 4.3. Uncompressed data (chunk type 0x01). + if chunkLen < checksumSize { + r.err = ErrCorrupt + return r.err + } + buf := r.buf[:checksumSize] + if !r.readFull(buf, false) { + return r.err + } + checksum := uint32(buf[0]) | uint32(buf[1])<<8 | uint32(buf[2])<<16 | uint32(buf[3])<<24 + // Read directly into r.decoded instead of via r.buf. + n := chunkLen - checksumSize + if n > len(r.decoded) { + r.err = ErrCorrupt + return r.err + } + if !r.readFull(r.decoded[:n], false) { + return r.err + } + if crc(r.decoded[:n]) != checksum { + r.err = ErrCorrupt + return r.err + } + r.i, r.j = 0, n + continue + + case chunkTypeStreamIdentifier: + // Section 4.1. Stream identifier (chunk type 0xff). + if chunkLen != len(magicBody) { + r.err = ErrCorrupt + return r.err + } + if !r.readFull(r.buf[:len(magicBody)], false) { + return r.err + } + for i := range len(magicBody) { + if r.buf[i] != magicBody[i] { + r.err = ErrCorrupt + return r.err + } + } + continue + } + + if chunkType <= 0x7f { + // Section 4.5. Reserved unskippable chunks (chunk types 0x02-0x7f). + r.err = ErrUnsupported + return r.err + } + // Section 4.4 Padding (chunk type 0xfe). + // Section 4.6. Reserved skippable chunks (chunk types 0x80-0xfd). + if !r.readFull(r.buf[:chunkLen], false) { + return r.err + } + } + + return nil +} + +// Read satisfies the io.Reader interface. +func (r *Reader) Read(p []byte) (int, error) { + if r.err != nil { + return 0, r.err + } + + if err := r.fill(); err != nil { + return 0, err + } + + n := copy(p, r.decoded[r.i:r.j]) + r.i += n + return n, nil +} + +// ReadByte satisfies the io.ByteReader interface. +func (r *Reader) ReadByte() (byte, error) { + if r.err != nil { + return 0, r.err + } + + if err := r.fill(); err != nil { + return 0, err + } + + c := r.decoded[r.i] + r.i++ + return c, nil +} diff --git a/backend/vendor/github.com/klauspost/compress/internal/snapref/decode_other.go b/backend/vendor/github.com/klauspost/compress/internal/snapref/decode_other.go new file mode 100644 index 0000000..77395a6 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/internal/snapref/decode_other.go @@ -0,0 +1,113 @@ +// Copyright 2016 The Snappy-Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package snapref + +// decode writes the decoding of src to dst. It assumes that the varint-encoded +// length of the decompressed bytes has already been read, and that len(dst) +// equals that length. +// +// It returns 0 on success or a decodeErrCodeXxx error code on failure. +func decode(dst, src []byte) int { + var d, s, offset, length int + for s < len(src) { + switch src[s] & 0x03 { + case tagLiteral: + x := uint32(src[s] >> 2) + switch { + case x < 60: + s++ + case x == 60: + s += 2 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + return decodeErrCodeCorrupt + } + x = uint32(src[s-1]) + case x == 61: + s += 3 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + return decodeErrCodeCorrupt + } + x = uint32(src[s-2]) | uint32(src[s-1])<<8 + case x == 62: + s += 4 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + return decodeErrCodeCorrupt + } + x = uint32(src[s-3]) | uint32(src[s-2])<<8 | uint32(src[s-1])<<16 + case x == 63: + s += 5 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + return decodeErrCodeCorrupt + } + x = uint32(src[s-4]) | uint32(src[s-3])<<8 | uint32(src[s-2])<<16 | uint32(src[s-1])<<24 + } + length = int(x) + 1 + if length <= 0 { + return decodeErrCodeUnsupportedLiteralLength + } + if length > len(dst)-d || length > len(src)-s { + return decodeErrCodeCorrupt + } + copy(dst[d:], src[s:s+length]) + d += length + s += length + continue + + case tagCopy1: + s += 2 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + return decodeErrCodeCorrupt + } + length = 4 + int(src[s-2])>>2&0x7 + offset = int(uint32(src[s-2])&0xe0<<3 | uint32(src[s-1])) + + case tagCopy2: + s += 3 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + return decodeErrCodeCorrupt + } + length = 1 + int(src[s-3])>>2 + offset = int(uint32(src[s-2]) | uint32(src[s-1])<<8) + + case tagCopy4: + s += 5 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + return decodeErrCodeCorrupt + } + length = 1 + int(src[s-5])>>2 + offset = int(uint32(src[s-4]) | uint32(src[s-3])<<8 | uint32(src[s-2])<<16 | uint32(src[s-1])<<24) + } + + if offset <= 0 || d < offset || length > len(dst)-d { + return decodeErrCodeCorrupt + } + // Copy from an earlier sub-slice of dst to a later sub-slice. + // If no overlap, use the built-in copy: + if offset >= length { + copy(dst[d:d+length], dst[d-offset:]) + d += length + continue + } + + // Unlike the built-in copy function, this byte-by-byte copy always runs + // forwards, even if the slices overlap. Conceptually, this is: + // + // d += forwardCopy(dst[d:d+length], dst[d-offset:]) + // + // We align the slices into a and b and show the compiler they are the same size. + // This allows the loop to run without bounds checks. + a := dst[d : d+length] + b := dst[d-offset:] + b = b[:len(a)] + for i := range a { + a[i] = b[i] + } + d += length + } + if d != len(dst) { + return decodeErrCodeCorrupt + } + return 0 +} diff --git a/backend/vendor/github.com/klauspost/compress/internal/snapref/encode.go b/backend/vendor/github.com/klauspost/compress/internal/snapref/encode.go new file mode 100644 index 0000000..860a994 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/internal/snapref/encode.go @@ -0,0 +1,291 @@ +// Copyright 2011 The Snappy-Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package snapref + +import ( + "encoding/binary" + "errors" + "io" +) + +// Encode returns the encoded form of src. The returned slice may be a sub- +// slice of dst if dst was large enough to hold the entire encoded block. +// Otherwise, a newly allocated slice will be returned. +// +// The dst and src must not overlap. It is valid to pass a nil dst. +// +// Encode handles the Snappy block format, not the Snappy stream format. +func Encode(dst, src []byte) []byte { + if n := MaxEncodedLen(len(src)); n < 0 { + panic(ErrTooLarge) + } else if cap(dst) < n { + dst = make([]byte, n) + } else { + dst = dst[:n] + } + + // The block starts with the varint-encoded length of the decompressed bytes. + d := binary.PutUvarint(dst, uint64(len(src))) + + for len(src) > 0 { + p := src + src = nil + if len(p) > maxBlockSize { + p, src = p[:maxBlockSize], p[maxBlockSize:] + } + if len(p) < minNonLiteralBlockSize { + d += emitLiteral(dst[d:], p) + } else { + d += encodeBlock(dst[d:], p) + } + } + return dst[:d] +} + +// inputMargin is the minimum number of extra input bytes to keep, inside +// encodeBlock's inner loop. On some architectures, this margin lets us +// implement a fast path for emitLiteral, where the copy of short (<= 16 byte) +// literals can be implemented as a single load to and store from a 16-byte +// register. That literal's actual length can be as short as 1 byte, so this +// can copy up to 15 bytes too much, but that's OK as subsequent iterations of +// the encoding loop will fix up the copy overrun, and this inputMargin ensures +// that we don't overrun the dst and src buffers. +const inputMargin = 16 - 1 + +// minNonLiteralBlockSize is the minimum size of the input to encodeBlock that +// could be encoded with a copy tag. This is the minimum with respect to the +// algorithm used by encodeBlock, not a minimum enforced by the file format. +// +// The encoded output must start with at least a 1 byte literal, as there are +// no previous bytes to copy. A minimal (1 byte) copy after that, generated +// from an emitCopy call in encodeBlock's main loop, would require at least +// another inputMargin bytes, for the reason above: we want any emitLiteral +// calls inside encodeBlock's main loop to use the fast path if possible, which +// requires being able to overrun by inputMargin bytes. Thus, +// minNonLiteralBlockSize equals 1 + 1 + inputMargin. +// +// The C++ code doesn't use this exact threshold, but it could, as discussed at +// https://groups.google.com/d/topic/snappy-compression/oGbhsdIJSJ8/discussion +// The difference between Go (2+inputMargin) and C++ (inputMargin) is purely an +// optimization. It should not affect the encoded form. This is tested by +// TestSameEncodingAsCppShortCopies. +const minNonLiteralBlockSize = 1 + 1 + inputMargin + +// MaxEncodedLen returns the maximum length of a snappy block, given its +// uncompressed length. +// +// It will return a negative value if srcLen is too large to encode. +func MaxEncodedLen(srcLen int) int { + n := uint64(srcLen) + if n > 0xffffffff { + return -1 + } + // Compressed data can be defined as: + // compressed := item* literal* + // item := literal* copy + // + // The trailing literal sequence has a space blowup of at most 62/60 + // since a literal of length 60 needs one tag byte + one extra byte + // for length information. + // + // Item blowup is trickier to measure. Suppose the "copy" op copies + // 4 bytes of data. Because of a special check in the encoding code, + // we produce a 4-byte copy only if the offset is < 65536. Therefore + // the copy op takes 3 bytes to encode, and this type of item leads + // to at most the 62/60 blowup for representing literals. + // + // Suppose the "copy" op copies 5 bytes of data. If the offset is big + // enough, it will take 5 bytes to encode the copy op. Therefore the + // worst case here is a one-byte literal followed by a five-byte copy. + // That is, 6 bytes of input turn into 7 bytes of "compressed" data. + // + // This last factor dominates the blowup, so the final estimate is: + n = 32 + n + n/6 + if n > 0xffffffff { + return -1 + } + return int(n) +} + +var errClosed = errors.New("snappy: Writer is closed") + +// NewWriter returns a new Writer that compresses to w. +// +// The Writer returned does not buffer writes. There is no need to Flush or +// Close such a Writer. +// +// Deprecated: the Writer returned is not suitable for many small writes, only +// for few large writes. Use NewBufferedWriter instead, which is efficient +// regardless of the frequency and shape of the writes, and remember to Close +// that Writer when done. +func NewWriter(w io.Writer) *Writer { + return &Writer{ + w: w, + obuf: make([]byte, obufLen), + } +} + +// NewBufferedWriter returns a new Writer that compresses to w, using the +// framing format described at +// https://github.com/google/snappy/blob/master/framing_format.txt +// +// The Writer returned buffers writes. Users must call Close to guarantee all +// data has been forwarded to the underlying io.Writer. They may also call +// Flush zero or more times before calling Close. +func NewBufferedWriter(w io.Writer) *Writer { + return &Writer{ + w: w, + ibuf: make([]byte, 0, maxBlockSize), + obuf: make([]byte, obufLen), + } +} + +// Writer is an io.Writer that can write Snappy-compressed bytes. +// +// Writer handles the Snappy stream format, not the Snappy block format. +type Writer struct { + w io.Writer + err error + + // ibuf is a buffer for the incoming (uncompressed) bytes. + // + // Its use is optional. For backwards compatibility, Writers created by the + // NewWriter function have ibuf == nil, do not buffer incoming bytes, and + // therefore do not need to be Flush'ed or Close'd. + ibuf []byte + + // obuf is a buffer for the outgoing (compressed) bytes. + obuf []byte + + // wroteStreamHeader is whether we have written the stream header. + wroteStreamHeader bool +} + +// Reset discards the writer's state and switches the Snappy writer to write to +// w. This permits reusing a Writer rather than allocating a new one. +func (w *Writer) Reset(writer io.Writer) { + w.w = writer + w.err = nil + if w.ibuf != nil { + w.ibuf = w.ibuf[:0] + } + w.wroteStreamHeader = false +} + +// Write satisfies the io.Writer interface. +func (w *Writer) Write(p []byte) (nRet int, errRet error) { + if w.ibuf == nil { + // Do not buffer incoming bytes. This does not perform or compress well + // if the caller of Writer.Write writes many small slices. This + // behavior is therefore deprecated, but still supported for backwards + // compatibility with code that doesn't explicitly Flush or Close. + return w.write(p) + } + + // The remainder of this method is based on bufio.Writer.Write from the + // standard library. + + for len(p) > (cap(w.ibuf)-len(w.ibuf)) && w.err == nil { + var n int + if len(w.ibuf) == 0 { + // Large write, empty buffer. + // Write directly from p to avoid copy. + n, _ = w.write(p) + } else { + n = copy(w.ibuf[len(w.ibuf):cap(w.ibuf)], p) + w.ibuf = w.ibuf[:len(w.ibuf)+n] + w.Flush() + } + nRet += n + p = p[n:] + } + if w.err != nil { + return nRet, w.err + } + n := copy(w.ibuf[len(w.ibuf):cap(w.ibuf)], p) + w.ibuf = w.ibuf[:len(w.ibuf)+n] + nRet += n + return nRet, nil +} + +func (w *Writer) write(p []byte) (nRet int, errRet error) { + if w.err != nil { + return 0, w.err + } + for len(p) > 0 { + obufStart := len(magicChunk) + if !w.wroteStreamHeader { + w.wroteStreamHeader = true + copy(w.obuf, magicChunk) + obufStart = 0 + } + + var uncompressed []byte + if len(p) > maxBlockSize { + uncompressed, p = p[:maxBlockSize], p[maxBlockSize:] + } else { + uncompressed, p = p, nil + } + checksum := crc(uncompressed) + + // Compress the buffer, discarding the result if the improvement + // isn't at least 12.5%. + compressed := Encode(w.obuf[obufHeaderLen:], uncompressed) + chunkType := uint8(chunkTypeCompressedData) + chunkLen := 4 + len(compressed) + obufEnd := obufHeaderLen + len(compressed) + if len(compressed) >= len(uncompressed)-len(uncompressed)/8 { + chunkType = chunkTypeUncompressedData + chunkLen = 4 + len(uncompressed) + obufEnd = obufHeaderLen + } + + // Fill in the per-chunk header that comes before the body. + w.obuf[len(magicChunk)+0] = chunkType + w.obuf[len(magicChunk)+1] = uint8(chunkLen >> 0) + w.obuf[len(magicChunk)+2] = uint8(chunkLen >> 8) + w.obuf[len(magicChunk)+3] = uint8(chunkLen >> 16) + w.obuf[len(magicChunk)+4] = uint8(checksum >> 0) + w.obuf[len(magicChunk)+5] = uint8(checksum >> 8) + w.obuf[len(magicChunk)+6] = uint8(checksum >> 16) + w.obuf[len(magicChunk)+7] = uint8(checksum >> 24) + + if _, err := w.w.Write(w.obuf[obufStart:obufEnd]); err != nil { + w.err = err + return nRet, err + } + if chunkType == chunkTypeUncompressedData { + if _, err := w.w.Write(uncompressed); err != nil { + w.err = err + return nRet, err + } + } + nRet += len(uncompressed) + } + return nRet, nil +} + +// Flush flushes the Writer to its underlying io.Writer. +func (w *Writer) Flush() error { + if w.err != nil { + return w.err + } + if len(w.ibuf) == 0 { + return nil + } + w.write(w.ibuf) + w.ibuf = w.ibuf[:0] + return w.err +} + +// Close calls Flush and then closes the Writer. +func (w *Writer) Close() error { + w.Flush() + ret := w.err + if w.err == nil { + w.err = errClosed + } + return ret +} diff --git a/backend/vendor/github.com/klauspost/compress/internal/snapref/encode_other.go b/backend/vendor/github.com/klauspost/compress/internal/snapref/encode_other.go new file mode 100644 index 0000000..2754bac --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/internal/snapref/encode_other.go @@ -0,0 +1,250 @@ +// Copyright 2016 The Snappy-Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package snapref + +func load32(b []byte, i int) uint32 { + b = b[i : i+4 : len(b)] // Help the compiler eliminate bounds checks on the next line. + return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 +} + +func load64(b []byte, i int) uint64 { + b = b[i : i+8 : len(b)] // Help the compiler eliminate bounds checks on the next line. + return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | + uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56 +} + +// emitLiteral writes a literal chunk and returns the number of bytes written. +// +// It assumes that: +// +// dst is long enough to hold the encoded bytes +// 1 <= len(lit) && len(lit) <= 65536 +func emitLiteral(dst, lit []byte) int { + i, n := 0, uint(len(lit)-1) + switch { + case n < 60: + dst[0] = uint8(n)<<2 | tagLiteral + i = 1 + case n < 1<<8: + dst[0] = 60<<2 | tagLiteral + dst[1] = uint8(n) + i = 2 + default: + dst[0] = 61<<2 | tagLiteral + dst[1] = uint8(n) + dst[2] = uint8(n >> 8) + i = 3 + } + return i + copy(dst[i:], lit) +} + +// emitCopy writes a copy chunk and returns the number of bytes written. +// +// It assumes that: +// +// dst is long enough to hold the encoded bytes +// 1 <= offset && offset <= 65535 +// 4 <= length && length <= 65535 +func emitCopy(dst []byte, offset, length int) int { + i := 0 + // The maximum length for a single tagCopy1 or tagCopy2 op is 64 bytes. The + // threshold for this loop is a little higher (at 68 = 64 + 4), and the + // length emitted down below is a little lower (at 60 = 64 - 4), because + // it's shorter to encode a length 67 copy as a length 60 tagCopy2 followed + // by a length 7 tagCopy1 (which encodes as 3+2 bytes) than to encode it as + // a length 64 tagCopy2 followed by a length 3 tagCopy2 (which encodes as + // 3+3 bytes). The magic 4 in the 64±4 is because the minimum length for a + // tagCopy1 op is 4 bytes, which is why a length 3 copy has to be an + // encodes-as-3-bytes tagCopy2 instead of an encodes-as-2-bytes tagCopy1. + for length >= 68 { + // Emit a length 64 copy, encoded as 3 bytes. + dst[i+0] = 63<<2 | tagCopy2 + dst[i+1] = uint8(offset) + dst[i+2] = uint8(offset >> 8) + i += 3 + length -= 64 + } + if length > 64 { + // Emit a length 60 copy, encoded as 3 bytes. + dst[i+0] = 59<<2 | tagCopy2 + dst[i+1] = uint8(offset) + dst[i+2] = uint8(offset >> 8) + i += 3 + length -= 60 + } + if length >= 12 || offset >= 2048 { + // Emit the remaining copy, encoded as 3 bytes. + dst[i+0] = uint8(length-1)<<2 | tagCopy2 + dst[i+1] = uint8(offset) + dst[i+2] = uint8(offset >> 8) + return i + 3 + } + // Emit the remaining copy, encoded as 2 bytes. + dst[i+0] = uint8(offset>>8)<<5 | uint8(length-4)<<2 | tagCopy1 + dst[i+1] = uint8(offset) + return i + 2 +} + +func hash(u, shift uint32) uint32 { + return (u * 0x1e35a7bd) >> shift +} + +// EncodeBlockInto exposes encodeBlock but checks dst size. +func EncodeBlockInto(dst, src []byte) (d int) { + if MaxEncodedLen(len(src)) > len(dst) { + return 0 + } + + // encodeBlock breaks on too big blocks, so split. + for len(src) > 0 { + p := src + src = nil + if len(p) > maxBlockSize { + p, src = p[:maxBlockSize], p[maxBlockSize:] + } + if len(p) < minNonLiteralBlockSize { + d += emitLiteral(dst[d:], p) + } else { + d += encodeBlock(dst[d:], p) + } + } + return d +} + +// encodeBlock encodes a non-empty src to a guaranteed-large-enough dst. It +// assumes that the varint-encoded length of the decompressed bytes has already +// been written. +// +// It also assumes that: +// +// len(dst) >= MaxEncodedLen(len(src)) && +// minNonLiteralBlockSize <= len(src) && len(src) <= maxBlockSize +func encodeBlock(dst, src []byte) (d int) { + // Initialize the hash table. Its size ranges from 1<<8 to 1<<14 inclusive. + // The table element type is uint16, as s < sLimit and sLimit < len(src) + // and len(src) <= maxBlockSize and maxBlockSize == 65536. + const ( + maxTableSize = 1 << 14 + // tableMask is redundant, but helps the compiler eliminate bounds + // checks. + tableMask = maxTableSize - 1 + ) + shift := uint32(32 - 8) + for tableSize := 1 << 8; tableSize < maxTableSize && tableSize < len(src); tableSize *= 2 { + shift-- + } + // In Go, all array elements are zero-initialized, so there is no advantage + // to a smaller tableSize per se. However, it matches the C++ algorithm, + // and in the asm versions of this code, we can get away with zeroing only + // the first tableSize elements. + var table [maxTableSize]uint16 + + // sLimit is when to stop looking for offset/length copies. The inputMargin + // lets us use a fast path for emitLiteral in the main loop, while we are + // looking for copies. + sLimit := len(src) - inputMargin + + // nextEmit is where in src the next emitLiteral should start from. + nextEmit := 0 + + // The encoded form must start with a literal, as there are no previous + // bytes to copy, so we start looking for hash matches at s == 1. + s := 1 + nextHash := hash(load32(src, s), shift) + + for { + // Copied from the C++ snappy implementation: + // + // Heuristic match skipping: If 32 bytes are scanned with no matches + // found, start looking only at every other byte. If 32 more bytes are + // scanned (or skipped), look at every third byte, etc.. When a match + // is found, immediately go back to looking at every byte. This is a + // small loss (~5% performance, ~0.1% density) for compressible data + // due to more bookkeeping, but for non-compressible data (such as + // JPEG) it's a huge win since the compressor quickly "realizes" the + // data is incompressible and doesn't bother looking for matches + // everywhere. + // + // The "skip" variable keeps track of how many bytes there are since + // the last match; dividing it by 32 (ie. right-shifting by five) gives + // the number of bytes to move ahead for each iteration. + skip := 32 + + nextS := s + candidate := 0 + for { + s = nextS + bytesBetweenHashLookups := skip >> 5 + nextS = s + bytesBetweenHashLookups + skip += bytesBetweenHashLookups + if nextS > sLimit { + goto emitRemainder + } + candidate = int(table[nextHash&tableMask]) + table[nextHash&tableMask] = uint16(s) + nextHash = hash(load32(src, nextS), shift) + if load32(src, s) == load32(src, candidate) { + break + } + } + + // A 4-byte match has been found. We'll later see if more than 4 bytes + // match. But, prior to the match, src[nextEmit:s] are unmatched. Emit + // them as literal bytes. + d += emitLiteral(dst[d:], src[nextEmit:s]) + + // Call emitCopy, and then see if another emitCopy could be our next + // move. Repeat until we find no match for the input immediately after + // what was consumed by the last emitCopy call. + // + // If we exit this loop normally then we need to call emitLiteral next, + // though we don't yet know how big the literal will be. We handle that + // by proceeding to the next iteration of the main loop. We also can + // exit this loop via goto if we get close to exhausting the input. + for { + // Invariant: we have a 4-byte match at s, and no need to emit any + // literal bytes prior to s. + base := s + + // Extend the 4-byte match as long as possible. + // + // This is an inlined version of: + // s = extendMatch(src, candidate+4, s+4) + s += 4 + for i := candidate + 4; s < len(src) && src[i] == src[s]; i, s = i+1, s+1 { + } + + d += emitCopy(dst[d:], base-candidate, s-base) + nextEmit = s + if s >= sLimit { + goto emitRemainder + } + + // We could immediately start working at s now, but to improve + // compression we first update the hash table at s-1 and at s. If + // another emitCopy is not our next move, also calculate nextHash + // at s+1. At least on GOARCH=amd64, these three hash calculations + // are faster as one load64 call (with some shifts) instead of + // three load32 calls. + x := load64(src, s-1) + prevHash := hash(uint32(x>>0), shift) + table[prevHash&tableMask] = uint16(s - 1) + currHash := hash(uint32(x>>8), shift) + candidate = int(table[currHash&tableMask]) + table[currHash&tableMask] = uint16(s) + if uint32(x>>8) != load32(src, candidate) { + nextHash = hash(uint32(x>>16), shift) + s++ + break + } + } + } + +emitRemainder: + if nextEmit < len(src) { + d += emitLiteral(dst[d:], src[nextEmit:]) + } + return d +} diff --git a/backend/vendor/github.com/klauspost/compress/internal/snapref/snappy.go b/backend/vendor/github.com/klauspost/compress/internal/snapref/snappy.go new file mode 100644 index 0000000..34d01f4 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/internal/snapref/snappy.go @@ -0,0 +1,98 @@ +// Copyright 2011 The Snappy-Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package snapref implements the Snappy compression format. It aims for very +// high speeds and reasonable compression. +// +// There are actually two Snappy formats: block and stream. They are related, +// but different: trying to decompress block-compressed data as a Snappy stream +// will fail, and vice versa. The block format is the Decode and Encode +// functions and the stream format is the Reader and Writer types. +// +// The block format, the more common case, is used when the complete size (the +// number of bytes) of the original data is known upfront, at the time +// compression starts. The stream format, also known as the framing format, is +// for when that isn't always true. +// +// The canonical, C++ implementation is at https://github.com/google/snappy and +// it only implements the block format. +package snapref + +import ( + "hash/crc32" +) + +/* +Each encoded block begins with the varint-encoded length of the decoded data, +followed by a sequence of chunks. Chunks begin and end on byte boundaries. The +first byte of each chunk is broken into its 2 least and 6 most significant bits +called l and m: l ranges in [0, 4) and m ranges in [0, 64). l is the chunk tag. +Zero means a literal tag. All other values mean a copy tag. + +For literal tags: + - If m < 60, the next 1 + m bytes are literal bytes. + - Otherwise, let n be the little-endian unsigned integer denoted by the next + m - 59 bytes. The next 1 + n bytes after that are literal bytes. + +For copy tags, length bytes are copied from offset bytes ago, in the style of +Lempel-Ziv compression algorithms. In particular: + - For l == 1, the offset ranges in [0, 1<<11) and the length in [4, 12). + The length is 4 + the low 3 bits of m. The high 3 bits of m form bits 8-10 + of the offset. The next byte is bits 0-7 of the offset. + - For l == 2, the offset ranges in [0, 1<<16) and the length in [1, 65). + The length is 1 + m. The offset is the little-endian unsigned integer + denoted by the next 2 bytes. + - For l == 3, this tag is a legacy format that is no longer issued by most + encoders. Nonetheless, the offset ranges in [0, 1<<32) and the length in + [1, 65). The length is 1 + m. The offset is the little-endian unsigned + integer denoted by the next 4 bytes. +*/ +const ( + tagLiteral = 0x00 + tagCopy1 = 0x01 + tagCopy2 = 0x02 + tagCopy4 = 0x03 +) + +const ( + checksumSize = 4 + chunkHeaderSize = 4 + magicChunk = "\xff\x06\x00\x00" + magicBody + magicBody = "sNaPpY" + + // maxBlockSize is the maximum size of the input to encodeBlock. It is not + // part of the wire format per se, but some parts of the encoder assume + // that an offset fits into a uint16. + // + // Also, for the framing format (Writer type instead of Encode function), + // https://github.com/google/snappy/blob/master/framing_format.txt says + // that "the uncompressed data in a chunk must be no longer than 65536 + // bytes". + maxBlockSize = 65536 + + // maxEncodedLenOfMaxBlockSize equals MaxEncodedLen(maxBlockSize), but is + // hard coded to be a const instead of a variable, so that obufLen can also + // be a const. Their equivalence is confirmed by + // TestMaxEncodedLenOfMaxBlockSize. + maxEncodedLenOfMaxBlockSize = 76490 + + obufHeaderLen = len(magicChunk) + checksumSize + chunkHeaderSize + obufLen = obufHeaderLen + maxEncodedLenOfMaxBlockSize +) + +const ( + chunkTypeCompressedData = 0x00 + chunkTypeUncompressedData = 0x01 + chunkTypePadding = 0xfe + chunkTypeStreamIdentifier = 0xff +) + +var crcTable = crc32.MakeTable(crc32.Castagnoli) + +// crc implements the checksum specified in section 3 of +// https://github.com/google/snappy/blob/master/framing_format.txt +func crc(b []byte) uint32 { + c := crc32.Update(0, crcTable, b) + return uint32(c>>15|c<<17) + 0xa282ead8 +} diff --git a/backend/vendor/github.com/klauspost/compress/s2sx.mod b/backend/vendor/github.com/klauspost/compress/s2sx.mod new file mode 100644 index 0000000..81bda5e --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/s2sx.mod @@ -0,0 +1,3 @@ +module github.com/klauspost/compress + +go 1.22 diff --git a/backend/vendor/github.com/klauspost/compress/s2sx.sum b/backend/vendor/github.com/klauspost/compress/s2sx.sum new file mode 100644 index 0000000..e69de29 diff --git a/backend/vendor/github.com/klauspost/compress/zstd/README.md b/backend/vendor/github.com/klauspost/compress/zstd/README.md new file mode 100644 index 0000000..c11d7fa --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/README.md @@ -0,0 +1,441 @@ +# zstd + +[Zstandard](https://facebook.github.io/zstd/) is a real-time compression algorithm, providing high compression ratios. +It offers a very wide range of compression / speed trade-off, while being backed by a very fast decoder. +A high performance compression algorithm is implemented. For now focused on speed. + +This package provides [compression](#Compressor) to and [decompression](#Decompressor) of Zstandard content. + +This package is pure Go. Use `noasm` and `nounsafe` to disable relevant features. + +The `zstd` package is provided as open source software using a Go standard license. + +Currently the package is heavily optimized for 64 bit processors and will be significantly slower on 32 bit processors. + +For seekable zstd streams, see [this excellent package](https://github.com/SaveTheRbtz/zstd-seekable-format-go). + +## Installation + +Install using `go get -u github.com/klauspost/compress`. The package is located in `github.com/klauspost/compress/zstd`. + +[![Go Reference](https://pkg.go.dev/badge/github.com/klauspost/compress/zstd.svg)](https://pkg.go.dev/github.com/klauspost/compress/zstd) + +## Compressor + +### Status: + +STABLE - there may always be subtle bugs, a wide variety of content has been tested and the library is actively +used by several projects. This library is being [fuzz-tested](https://github.com/klauspost/compress-fuzz) for all updates. + +There may still be specific combinations of data types/size/settings that could lead to edge cases, +so as always, testing is recommended. + +For now, a high speed (fastest) and medium-fast (default) compressor has been implemented. + +* The "Fastest" compression ratio is roughly equivalent to zstd level 1. +* The "Default" compression ratio is roughly equivalent to zstd level 3 (default). +* The "Better" compression ratio is roughly equivalent to zstd level 7. +* The "Best" compression ratio is roughly equivalent to zstd level 11. + +In terms of speed, it is typically 2x as fast as the stdlib deflate/gzip in its fastest mode. +The compression ratio compared to stdlib is around level 3, but usually 3x as fast. + + +### Usage + +An Encoder can be used for either compressing a stream via the +`io.WriteCloser` interface supported by the Encoder or as multiple independent +tasks via the `EncodeAll` function. +Smaller encodes are encouraged to use the EncodeAll function. +Use `NewWriter` to create a new instance that can be used for both. + +To create a writer with default options, do like this: + +```Go +// Compress input to output. +func Compress(in io.Reader, out io.Writer) error { + enc, err := zstd.NewWriter(out) + if err != nil { + return err + } + _, err = io.Copy(enc, in) + if err != nil { + enc.Close() + return err + } + return enc.Close() +} +``` + +Now you can encode by writing data to `enc`. The output will be finished writing when `Close()` is called. +Even if your encode fails, you should still call `Close()` to release any resources that may be held up. + +The above is fine for big encodes. However, whenever possible try to *reuse* the writer. + +To reuse the encoder, you can use the `Reset(io.Writer)` function to change to another output. +This will allow the encoder to reuse all resources and avoid wasteful allocations. + +Currently stream encoding has 'light' concurrency, meaning up to 2 goroutines can be working on part +of a stream. This is independent of the `WithEncoderConcurrency(n)`, but that is likely to change +in the future. So if you want to limit concurrency for future updates, specify the concurrency +you would like. + +If you would like stream encoding to be done without spawning async goroutines, use `WithEncoderConcurrency(1)` +which will compress input as each block is completed, blocking on writes until each has completed. + +You can specify your desired compression level using `WithEncoderLevel()` option. Currently only pre-defined +compression settings can be specified. + +#### Future Compatibility Guarantees + +This will be an evolving project. When using this package it is important to note that both the compression efficiency and speed may change. + +The goal will be to keep the default efficiency at the default zstd (level 3). +However the encoding should never be assumed to remain the same, +and you should not use hashes of compressed output for similarity checks. + +The Encoder can be assumed to produce the same output from the exact same code version. +However, the may be modes in the future that break this, +although they will not be enabled without an explicit option. + +This encoder is not designed to (and will probably never) output the exact same bitstream as the reference encoder. + +Also note, that the cgo decompressor currently does not [report all errors on invalid input](https://github.com/DataDog/zstd/issues/59), +[omits error checks](https://github.com/DataDog/zstd/issues/61), [ignores checksums](https://github.com/DataDog/zstd/issues/43) +and seems to ignore concatenated streams, even though [it is part of the spec](https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#frames). + +#### Blocks + +For compressing small blocks, the returned encoder has a function called `EncodeAll(src, dst []byte) []byte`. + +`EncodeAll` will encode all input in src and append it to dst. +This function can be called concurrently. +Each call will only run on a same goroutine as the caller. + +Encoded blocks can be concatenated and the result will be the combined input stream. +Data compressed with EncodeAll can be decoded with the Decoder, using either a stream or `DecodeAll`. + +Especially when encoding blocks you should take special care to reuse the encoder. +This will effectively make it run without allocations after a warmup period. +To make it run completely without allocations, supply a destination buffer with space for all content. + +```Go +import "github.com/klauspost/compress/zstd" + +// Create a writer that caches compressors. +// For this operation type we supply a nil Reader. +var encoder, _ = zstd.NewWriter(nil) + +// Compress a buffer. +// If you have a destination buffer, the allocation in the call can also be eliminated. +func Compress(src []byte) []byte { + return encoder.EncodeAll(src, make([]byte, 0, len(src))) +} +``` + +You can control the maximum number of concurrent encodes using the `WithEncoderConcurrency(n)` +option when creating the writer. + +Using the Encoder for both a stream and individual blocks concurrently is safe. + +### Performance + +I have collected some speed examples to compare speed and compression against other compressors. + +* `file` is the input file. +* `out` is the compressor used. `zskp` is this package. `zstd` is the Datadog cgo library. `gzstd/gzkp` is gzip standard and this library. +* `level` is the compression level used. For `zskp` level 1 is "fastest", level 2 is "default"; 3 is "better", 4 is "best". +* `insize`/`outsize` is the input/output size. +* `millis` is the number of milliseconds used for compression. +* `mb/s` is megabytes (2^20 bytes) per second. + +``` +Silesia Corpus: +http://sun.aei.polsl.pl/~sdeor/corpus/silesia.zip + +This package: +file out level insize outsize millis mb/s +silesia.tar zskp 1 211947520 73821326 634 318.47 +silesia.tar zskp 2 211947520 67655404 1508 133.96 +silesia.tar zskp 3 211947520 64746933 3000 67.37 +silesia.tar zskp 4 211947520 60073508 16926 11.94 + +cgo zstd: +silesia.tar zstd 1 211947520 73605392 543 371.56 +silesia.tar zstd 3 211947520 66793289 864 233.68 +silesia.tar zstd 6 211947520 62916450 1913 105.66 +silesia.tar zstd 9 211947520 60212393 5063 39.92 + +gzip, stdlib/this package: +silesia.tar gzstd 1 211947520 80007735 1498 134.87 +silesia.tar gzkp 1 211947520 80088272 1009 200.31 + +GOB stream of binary data. Highly compressible. +https://files.klauspost.com/compress/gob-stream.7z + +file out level insize outsize millis mb/s +gob-stream zskp 1 1911399616 233948096 3230 564.34 +gob-stream zskp 2 1911399616 203997694 4997 364.73 +gob-stream zskp 3 1911399616 173526523 13435 135.68 +gob-stream zskp 4 1911399616 162195235 47559 38.33 + +gob-stream zstd 1 1911399616 249810424 2637 691.26 +gob-stream zstd 3 1911399616 208192146 3490 522.31 +gob-stream zstd 6 1911399616 193632038 6687 272.56 +gob-stream zstd 9 1911399616 177620386 16175 112.70 + +gob-stream gzstd 1 1911399616 357382013 9046 201.49 +gob-stream gzkp 1 1911399616 359136669 4885 373.08 + +The test data for the Large Text Compression Benchmark is the first +10^9 bytes of the English Wikipedia dump on Mar. 3, 2006. +http://mattmahoney.net/dc/textdata.html + +file out level insize outsize millis mb/s +enwik9 zskp 1 1000000000 343833605 3687 258.64 +enwik9 zskp 2 1000000000 317001237 7672 124.29 +enwik9 zskp 3 1000000000 291915823 15923 59.89 +enwik9 zskp 4 1000000000 261710291 77697 12.27 + +enwik9 zstd 1 1000000000 358072021 3110 306.65 +enwik9 zstd 3 1000000000 313734672 4784 199.35 +enwik9 zstd 6 1000000000 295138875 10290 92.68 +enwik9 zstd 9 1000000000 278348700 28549 33.40 + +enwik9 gzstd 1 1000000000 382578136 8608 110.78 +enwik9 gzkp 1 1000000000 382781160 5628 169.45 + +Highly compressible JSON file. +https://files.klauspost.com/compress/github-june-2days-2019.json.zst + +file out level insize outsize millis mb/s +github-june-2days-2019.json zskp 1 6273951764 697439532 9789 611.17 +github-june-2days-2019.json zskp 2 6273951764 610876538 18553 322.49 +github-june-2days-2019.json zskp 3 6273951764 517662858 44186 135.41 +github-june-2days-2019.json zskp 4 6273951764 464617114 165373 36.18 + +github-june-2days-2019.json zstd 1 6273951764 766284037 8450 708.00 +github-june-2days-2019.json zstd 3 6273951764 661889476 10927 547.57 +github-june-2days-2019.json zstd 6 6273951764 642756859 22996 260.18 +github-june-2days-2019.json zstd 9 6273951764 601974523 52413 114.16 + +github-june-2days-2019.json gzstd 1 6273951764 1164397768 26793 223.32 +github-june-2days-2019.json gzkp 1 6273951764 1120631856 17693 338.16 + +VM Image, Linux mint with a few installed applications: +https://files.klauspost.com/compress/rawstudio-mint14.7z + +file out level insize outsize millis mb/s +rawstudio-mint14.tar zskp 1 8558382592 3718400221 18206 448.29 +rawstudio-mint14.tar zskp 2 8558382592 3326118337 37074 220.15 +rawstudio-mint14.tar zskp 3 8558382592 3163842361 87306 93.49 +rawstudio-mint14.tar zskp 4 8558382592 2970480650 783862 10.41 + +rawstudio-mint14.tar zstd 1 8558382592 3609250104 17136 476.27 +rawstudio-mint14.tar zstd 3 8558382592 3341679997 29262 278.92 +rawstudio-mint14.tar zstd 6 8558382592 3235846406 77904 104.77 +rawstudio-mint14.tar zstd 9 8558382592 3160778861 140946 57.91 + +rawstudio-mint14.tar gzstd 1 8558382592 3926234992 51345 158.96 +rawstudio-mint14.tar gzkp 1 8558382592 3960117298 36722 222.26 + +CSV data: +https://files.klauspost.com/compress/nyc-taxi-data-10M.csv.zst + +file out level insize outsize millis mb/s +nyc-taxi-data-10M.csv zskp 1 3325605752 641319332 9462 335.17 +nyc-taxi-data-10M.csv zskp 2 3325605752 588976126 17570 180.50 +nyc-taxi-data-10M.csv zskp 3 3325605752 529329260 32432 97.79 +nyc-taxi-data-10M.csv zskp 4 3325605752 474949772 138025 22.98 + +nyc-taxi-data-10M.csv zstd 1 3325605752 687399637 8233 385.18 +nyc-taxi-data-10M.csv zstd 3 3325605752 598514411 10065 315.07 +nyc-taxi-data-10M.csv zstd 6 3325605752 570522953 20038 158.27 +nyc-taxi-data-10M.csv zstd 9 3325605752 517554797 64565 49.12 + +nyc-taxi-data-10M.csv gzstd 1 3325605752 928654908 21270 149.11 +nyc-taxi-data-10M.csv gzkp 1 3325605752 922273214 13929 227.68 +``` + +## Decompressor + +Status: STABLE - there may still be subtle bugs, but a wide variety of content has been tested. + +This library is being continuously [fuzz-tested](https://github.com/klauspost/compress-fuzz), +kindly supplied by [fuzzit.dev](https://fuzzit.dev/). +The main purpose of the fuzz testing is to ensure that it is not possible to crash the decoder, +or run it past its limits with ANY input provided. + +### Usage + +The package has been designed for two main usages, big streams of data and smaller in-memory buffers. +There are two main usages of the package for these. Both of them are accessed by creating a `Decoder`. + +For streaming use a simple setup could look like this: + +```Go +import "github.com/klauspost/compress/zstd" + +func Decompress(in io.Reader, out io.Writer) error { + d, err := zstd.NewReader(in) + if err != nil { + return err + } + defer d.Close() + + // Copy content... + _, err = io.Copy(out, d) + return err +} +``` + +It is important to use the "Close" function when you no longer need the Reader to stop running goroutines, +when running with default settings. +Goroutines will exit once an error has been returned, including `io.EOF` at the end of a stream. + +Streams are decoded concurrently in 4 asynchronous stages to give the best possible throughput. +However, if you prefer synchronous decompression, use `WithDecoderConcurrency(1)` which will decompress data +as it is being requested only. + +For decoding buffers, it could look something like this: + +```Go +import "github.com/klauspost/compress/zstd" + +// Create a reader that caches decompressors. +// For this operation type we supply a nil Reader. +var decoder, _ = zstd.NewReader(nil, zstd.WithDecoderConcurrency(0)) + +// Decompress a buffer. We don't supply a destination buffer, +// so it will be allocated by the decoder. +func Decompress(src []byte) ([]byte, error) { + return decoder.DecodeAll(src, nil) +} +``` + +Both of these cases should provide the functionality needed. +The decoder can be used for *concurrent* decompression of multiple buffers. +By default 4 decompressors will be created. + +It will only allow a certain number of concurrent operations to run. +To tweak that yourself use the `WithDecoderConcurrency(n)` option when creating the decoder. +It is possible to use `WithDecoderConcurrency(0)` to create GOMAXPROCS decoders. + +### Dictionaries + +Data compressed with [dictionaries](https://github.com/facebook/zstd#the-case-for-small-data-compression) can be decompressed. + +Dictionaries are added individually to Decoders. +Dictionaries are generated by the `zstd --train` command and contains an initial state for the decoder. +To add a dictionary use the `WithDecoderDicts(dicts ...[]byte)` option with the dictionary data. +Several dictionaries can be added at once. + +The dictionary will be used automatically for the data that specifies them. +A re-used Decoder will still contain the dictionaries registered. + +When registering multiple dictionaries with the same ID, the last one will be used. + +It is possible to use dictionaries when compressing data. + +To enable a dictionary use `WithEncoderDict(dict []byte)`. Here only one dictionary will be used +and it will likely be used even if it doesn't improve compression. + +The used dictionary must be used to decompress the content. + +For any real gains, the dictionary should be built with similar data. +If an unsuitable dictionary is used the output may be slightly larger than using no dictionary. +Use the [zstd commandline tool](https://github.com/facebook/zstd/releases) to build a dictionary from sample data. +For information see [zstd dictionary information](https://github.com/facebook/zstd#the-case-for-small-data-compression). + +For now there is a fixed startup performance penalty for compressing content with dictionaries. +This will likely be improved over time. Just be aware to test performance when implementing. + +### Allocation-less operation + +The decoder has been designed to operate without allocations after a warmup. + +This means that you should *store* the decoder for best performance. +To re-use a stream decoder, use the `Reset(r io.Reader) error` to switch to another stream. +A decoder can safely be re-used even if the previous stream failed. + +To release the resources, you must call the `Close()` function on a decoder. +After this it can *no longer be reused*, but all running goroutines will be stopped. +So you *must* use this if you will no longer need the Reader. + +For decompressing smaller buffers a single decoder can be used. +When decoding buffers, you can supply a destination slice with length 0 and your expected capacity. +In this case no unneeded allocations should be made. + +### Concurrency + +The buffer decoder does everything on the same goroutine and does nothing concurrently. +It can however decode several buffers concurrently. Use `WithDecoderConcurrency(n)` to limit that. + +The stream decoder will create goroutines that: + +1) Reads input and splits the input into blocks. +2) Decompression of literals. +3) Decompression of sequences. +4) Reconstruction of output stream. + +So effectively this also means the decoder will "read ahead" and prepare data to always be available for output. + +The concurrency level will, for streams, determine how many blocks ahead the compression will start. + +Since "blocks" are quite dependent on the output of the previous block stream decoding will only have limited concurrency. + +In practice this means that concurrency is often limited to utilizing about 3 cores effectively. + +### Benchmarks + +The first two are streaming decodes and the last are smaller inputs. + +Running on AMD Ryzen 9 3950X 16-Core Processor. AMD64 assembly used. + +``` +BenchmarkDecoderSilesia-32 5 206878840 ns/op 1024.50 MB/s 49808 B/op 43 allocs/op +BenchmarkDecoderEnwik9-32 1 1271809000 ns/op 786.28 MB/s 72048 B/op 52 allocs/op + +Concurrent blocks, performance: + +BenchmarkDecoder_DecodeAllParallel/kppkn.gtb.zst-32 67356 17857 ns/op 10321.96 MB/s 22.48 pct 102 B/op 0 allocs/op +BenchmarkDecoder_DecodeAllParallel/geo.protodata.zst-32 266656 4421 ns/op 26823.21 MB/s 11.89 pct 19 B/op 0 allocs/op +BenchmarkDecoder_DecodeAllParallel/plrabn12.txt.zst-32 20992 56842 ns/op 8477.17 MB/s 39.90 pct 754 B/op 0 allocs/op +BenchmarkDecoder_DecodeAllParallel/lcet10.txt.zst-32 27456 43932 ns/op 9714.01 MB/s 33.27 pct 524 B/op 0 allocs/op +BenchmarkDecoder_DecodeAllParallel/asyoulik.txt.zst-32 78432 15047 ns/op 8319.15 MB/s 40.34 pct 66 B/op 0 allocs/op +BenchmarkDecoder_DecodeAllParallel/alice29.txt.zst-32 65800 18436 ns/op 8249.63 MB/s 37.75 pct 88 B/op 0 allocs/op +BenchmarkDecoder_DecodeAllParallel/html_x_4.zst-32 102993 11523 ns/op 35546.09 MB/s 3.637 pct 143 B/op 0 allocs/op +BenchmarkDecoder_DecodeAllParallel/paper-100k.pdf.zst-32 1000000 1070 ns/op 95720.98 MB/s 80.53 pct 3 B/op 0 allocs/op +BenchmarkDecoder_DecodeAllParallel/fireworks.jpeg.zst-32 749802 1752 ns/op 70272.35 MB/s 100.0 pct 5 B/op 0 allocs/op +BenchmarkDecoder_DecodeAllParallel/urls.10K.zst-32 22640 52934 ns/op 13263.37 MB/s 26.25 pct 1014 B/op 0 allocs/op +BenchmarkDecoder_DecodeAllParallel/html.zst-32 226412 5232 ns/op 19572.27 MB/s 14.49 pct 20 B/op 0 allocs/op +BenchmarkDecoder_DecodeAllParallel/comp-data.bin.zst-32 923041 1276 ns/op 3194.71 MB/s 31.26 pct 0 B/op 0 allocs/op +``` + +This reflects the performance around May 2022, but this may be out of date. + +## Zstd inside ZIP files + +It is possible to use zstandard to compress individual files inside zip archives. +While this isn't widely supported it can be useful for internal files. + +To support the compression and decompression of these files you must register a compressor and decompressor. + +It is highly recommended registering the (de)compressors on individual zip Reader/Writer and NOT +use the global registration functions. The main reason for this is that 2 registrations from +different packages will result in a panic. + +It is a good idea to only have a single compressor and decompressor, since they can be used for multiple zip +files concurrently, and using a single instance will allow reusing some resources. + +See [this example](https://pkg.go.dev/github.com/klauspost/compress/zstd#example-ZipCompressor) for +how to compress and decompress files inside zip archives. + +# Contributions + +Contributions are always welcome. +For new features/fixes, remember to add tests and for performance enhancements include benchmarks. + +For general feedback and experience reports, feel free to open an issue or write me on [Twitter](https://twitter.com/sh0dan). + +This package includes the excellent [`github.com/cespare/xxhash`](https://github.com/cespare/xxhash) package Copyright (c) 2016 Caleb Spare. diff --git a/backend/vendor/github.com/klauspost/compress/zstd/bitreader.go b/backend/vendor/github.com/klauspost/compress/zstd/bitreader.go new file mode 100644 index 0000000..d41e3e1 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/bitreader.go @@ -0,0 +1,135 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "errors" + "fmt" + "io" + "math/bits" + + "github.com/klauspost/compress/internal/le" +) + +// bitReader reads a bitstream in reverse. +// The last set bit indicates the start of the stream and is used +// for aligning the input. +type bitReader struct { + in []byte + value uint64 // Maybe use [16]byte, but shifting is awkward. + cursor int // offset where next read should end + bitsRead uint8 +} + +// init initializes and resets the bit reader. +func (b *bitReader) init(in []byte) error { + if len(in) < 1 { + return errors.New("corrupt stream: too short") + } + b.in = in + // The highest bit of the last byte indicates where to start + v := in[len(in)-1] + if v == 0 { + return errors.New("corrupt stream, did not find end of stream") + } + b.cursor = len(in) + b.bitsRead = 64 + b.value = 0 + if len(in) >= 8 { + b.fillFastStart() + } else { + b.fill() + b.fill() + } + b.bitsRead += 8 - uint8(highBits(uint32(v))) + return nil +} + +// getBits will return n bits. n can be 0. +func (b *bitReader) getBits(n uint8) int { + if n == 0 /*|| b.bitsRead >= 64 */ { + return 0 + } + return int(b.get32BitsFast(n)) +} + +// get32BitsFast requires that at least one bit is requested every time. +// There are no checks if the buffer is filled. +func (b *bitReader) get32BitsFast(n uint8) uint32 { + const regMask = 64 - 1 + v := uint32((b.value << (b.bitsRead & regMask)) >> ((regMask + 1 - n) & regMask)) + b.bitsRead += n + return v +} + +// fillFast() will make sure at least 32 bits are available. +// There must be at least 4 bytes available. +func (b *bitReader) fillFast() { + if b.bitsRead < 32 { + return + } + b.cursor -= 4 + b.value = (b.value << 32) | uint64(le.Load32(b.in, b.cursor)) + b.bitsRead -= 32 +} + +// fillFastStart() assumes the bitreader is empty and there is at least 8 bytes to read. +func (b *bitReader) fillFastStart() { + b.cursor -= 8 + b.value = le.Load64(b.in, b.cursor) + b.bitsRead = 0 +} + +// fill() will make sure at least 32 bits are available. +func (b *bitReader) fill() { + if b.bitsRead < 32 { + return + } + if b.cursor >= 4 { + b.cursor -= 4 + b.value = (b.value << 32) | uint64(le.Load32(b.in, b.cursor)) + b.bitsRead -= 32 + return + } + + b.bitsRead -= uint8(8 * b.cursor) + for b.cursor > 0 { + b.cursor -= 1 + b.value = (b.value << 8) | uint64(b.in[b.cursor]) + } +} + +// finished returns true if all bits have been read from the bit stream. +func (b *bitReader) finished() bool { + return b.cursor == 0 && b.bitsRead >= 64 +} + +// overread returns true if more bits have been requested than is on the stream. +func (b *bitReader) overread() bool { + return b.bitsRead > 64 +} + +// remain returns the number of bits remaining. +func (b *bitReader) remain() uint { + return 8*uint(b.cursor) + 64 - uint(b.bitsRead) +} + +// close the bitstream and returns an error if out-of-buffer reads occurred. +func (b *bitReader) close() error { + // Release reference. + b.in = nil + b.cursor = 0 + if !b.finished() { + return fmt.Errorf("%d extra bits on block, should be 0", b.remain()) + } + if b.bitsRead > 64 { + return io.ErrUnexpectedEOF + } + return nil +} + +func highBits(val uint32) (n uint32) { + return uint32(bits.Len32(val) - 1) +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/bitwriter.go b/backend/vendor/github.com/klauspost/compress/zstd/bitwriter.go new file mode 100644 index 0000000..b22b297 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/bitwriter.go @@ -0,0 +1,112 @@ +// Copyright 2018 Klaus Post. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. +// Based on work Copyright (c) 2013, Yann Collet, released under BSD License. + +package zstd + +// bitWriter will write bits. +// First bit will be LSB of the first byte of output. +type bitWriter struct { + bitContainer uint64 + nBits uint8 + out []byte +} + +// bitMask16 is bitmasks. Has extra to avoid bounds check. +var bitMask16 = [32]uint16{ + 0, 1, 3, 7, 0xF, 0x1F, + 0x3F, 0x7F, 0xFF, 0x1FF, 0x3FF, 0x7FF, + 0xFFF, 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF, 0xFFFF, + 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, + 0xFFFF, 0xFFFF} /* up to 16 bits */ + +var bitMask32 = [32]uint32{ + 0, 1, 3, 7, 0xF, 0x1F, 0x3F, 0x7F, 0xFF, + 0x1FF, 0x3FF, 0x7FF, 0xFFF, 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF, + 0x1ffff, 0x3ffff, 0x7FFFF, 0xfFFFF, 0x1fFFFF, 0x3fFFFF, 0x7fFFFF, 0xffFFFF, + 0x1ffFFFF, 0x3ffFFFF, 0x7ffFFFF, 0xfffFFFF, 0x1fffFFFF, 0x3fffFFFF, 0x7fffFFFF, +} // up to 32 bits + +// addBits16NC will add up to 16 bits. +// It will not check if there is space for them, +// so the caller must ensure that it has flushed recently. +func (b *bitWriter) addBits16NC(value uint16, bits uint8) { + b.bitContainer |= uint64(value&bitMask16[bits&31]) << (b.nBits & 63) + b.nBits += bits +} + +// addBits32NC will add up to 31 bits. +// It will not check if there is space for them, +// so the caller must ensure that it has flushed recently. +func (b *bitWriter) addBits32NC(value uint32, bits uint8) { + b.bitContainer |= uint64(value&bitMask32[bits&31]) << (b.nBits & 63) + b.nBits += bits +} + +// addBits64NC will add up to 64 bits. +// There must be space for 32 bits. +func (b *bitWriter) addBits64NC(value uint64, bits uint8) { + if bits <= 31 { + b.addBits32Clean(uint32(value), bits) + return + } + b.addBits32Clean(uint32(value), 32) + b.flush32() + b.addBits32Clean(uint32(value>>32), bits-32) +} + +// addBits32Clean will add up to 32 bits. +// It will not check if there is space for them. +// The input must not contain more bits than specified. +func (b *bitWriter) addBits32Clean(value uint32, bits uint8) { + b.bitContainer |= uint64(value) << (b.nBits & 63) + b.nBits += bits +} + +// addBits16Clean will add up to 16 bits. value may not contain more set bits than indicated. +// It will not check if there is space for them, so the caller must ensure that it has flushed recently. +func (b *bitWriter) addBits16Clean(value uint16, bits uint8) { + b.bitContainer |= uint64(value) << (b.nBits & 63) + b.nBits += bits +} + +// flush32 will flush out, so there are at least 32 bits available for writing. +func (b *bitWriter) flush32() { + if b.nBits < 32 { + return + } + b.out = append(b.out, + byte(b.bitContainer), + byte(b.bitContainer>>8), + byte(b.bitContainer>>16), + byte(b.bitContainer>>24)) + b.nBits -= 32 + b.bitContainer >>= 32 +} + +// flushAlign will flush remaining full bytes and align to next byte boundary. +func (b *bitWriter) flushAlign() { + nbBytes := (b.nBits + 7) >> 3 + for i := range nbBytes { + b.out = append(b.out, byte(b.bitContainer>>(i*8))) + } + b.nBits = 0 + b.bitContainer = 0 +} + +// close will write the alignment bit and write the final byte(s) +// to the output. +func (b *bitWriter) close() { + // End mark + b.addBits16Clean(1, 1) + // flush until next byte. + b.flushAlign() +} + +// reset and continue writing by appending to out. +func (b *bitWriter) reset(out []byte) { + b.bitContainer = 0 + b.nBits = 0 + b.out = out +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/blockdec.go b/backend/vendor/github.com/klauspost/compress/zstd/blockdec.go new file mode 100644 index 0000000..2329e99 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/blockdec.go @@ -0,0 +1,712 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "errors" + "fmt" + "hash/crc32" + "io" + "sync" + + "github.com/klauspost/compress/huff0" + "github.com/klauspost/compress/zstd/internal/xxhash" +) + +type blockType uint8 + +//go:generate stringer -type=blockType,literalsBlockType,seqCompMode,tableIndex + +const ( + blockTypeRaw blockType = iota + blockTypeRLE + blockTypeCompressed + blockTypeReserved +) + +type literalsBlockType uint8 + +const ( + literalsBlockRaw literalsBlockType = iota + literalsBlockRLE + literalsBlockCompressed + literalsBlockTreeless +) + +const ( + // maxCompressedBlockSize is the biggest allowed compressed block size (128KB) + maxCompressedBlockSize = 128 << 10 + + compressedBlockOverAlloc = 16 + maxCompressedBlockSizeAlloc = 128<<10 + compressedBlockOverAlloc + + // Maximum possible block size (all Raw+Uncompressed). + maxBlockSize = (1 << 21) - 1 + + maxMatchLen = 131074 + maxSequences = 0x7f00 + 0xffff + + // We support slightly less than the reference decoder to be able to + // use ints on 32 bit archs. + maxOffsetBits = 30 +) + +var ( + huffDecoderPool = sync.Pool{New: func() any { + return &huff0.Scratch{} + }} + + fseDecoderPool = sync.Pool{New: func() any { + return &fseDecoder{} + }} +) + +type blockDec struct { + // Raw source data of the block. + data []byte + dataStorage []byte + + // Destination of the decoded data. + dst []byte + + // Buffer for literals data. + literalBuf []byte + + // Window size of the block. + WindowSize uint64 + + err error + + // Check against this crc, if hasCRC is true. + checkCRC uint32 + hasCRC bool + + // Frame to use for singlethreaded decoding. + // Should not be used by the decoder itself since parent may be another frame. + localFrame *frameDec + + sequence []seqVals + + async struct { + newHist *history + literals []byte + seqData []byte + seqSize int // Size of uncompressed sequences + fcs uint64 + } + + // Block is RLE, this is the size. + RLESize uint32 + + Type blockType + + // Is this the last block of a frame? + Last bool + + // Use less memory + lowMem bool +} + +func (b *blockDec) String() string { + if b == nil { + return "" + } + return fmt.Sprintf("Steam Size: %d, Type: %v, Last: %t, Window: %d", len(b.data), b.Type, b.Last, b.WindowSize) +} + +func newBlockDec(lowMem bool) *blockDec { + b := blockDec{ + lowMem: lowMem, + } + return &b +} + +// reset will reset the block. +// Input must be a start of a block and will be at the end of the block when returned. +func (b *blockDec) reset(br byteBuffer, windowSize uint64) error { + b.WindowSize = windowSize + tmp, err := br.readSmall(3) + if err != nil { + println("Reading block header:", err) + return err + } + bh := uint32(tmp[0]) | (uint32(tmp[1]) << 8) | (uint32(tmp[2]) << 16) + b.Last = bh&1 != 0 + b.Type = blockType((bh >> 1) & 3) + // find size. + cSize := int(bh >> 3) + maxSize := maxCompressedBlockSizeAlloc + switch b.Type { + case blockTypeReserved: + return ErrReservedBlockType + case blockTypeRLE: + if cSize > maxCompressedBlockSize || cSize > int(b.WindowSize) { + if debugDecoder { + printf("rle block too big: csize:%d block: %+v\n", uint64(cSize), b) + } + return ErrWindowSizeExceeded + } + b.RLESize = uint32(cSize) + if b.lowMem { + maxSize = cSize + } + cSize = 1 + case blockTypeCompressed: + if debugDecoder { + println("Data size on stream:", cSize) + } + b.RLESize = 0 + maxSize = maxCompressedBlockSizeAlloc + if windowSize < maxCompressedBlockSize && b.lowMem { + maxSize = int(windowSize) + compressedBlockOverAlloc + } + if cSize > maxCompressedBlockSize || uint64(cSize) > b.WindowSize { + if debugDecoder { + printf("compressed block too big: csize:%d block: %+v\n", uint64(cSize), b) + } + return ErrCompressedSizeTooBig + } + // Empty compressed blocks must at least be 2 bytes + // for Literals_Block_Type and one for Sequences_Section_Header. + if cSize < 2 { + return ErrBlockTooSmall + } + case blockTypeRaw: + if cSize > maxCompressedBlockSize || cSize > int(b.WindowSize) { + if debugDecoder { + printf("rle block too big: csize:%d block: %+v\n", uint64(cSize), b) + } + return ErrWindowSizeExceeded + } + + b.RLESize = 0 + // We do not need a destination for raw blocks. + maxSize = -1 + default: + panic("Invalid block type") + } + + // Read block data. + if _, ok := br.(*byteBuf); !ok && cap(b.dataStorage) < cSize { + // byteBuf doesn't need a destination buffer. + if b.lowMem || cSize > maxCompressedBlockSize { + b.dataStorage = make([]byte, 0, cSize+compressedBlockOverAlloc) + } else { + b.dataStorage = make([]byte, 0, maxCompressedBlockSizeAlloc) + } + } + b.data, err = br.readBig(cSize, b.dataStorage) + if err != nil { + if debugDecoder { + println("Reading block:", err, "(", cSize, ")", len(b.data)) + printf("%T", br) + } + return err + } + if cap(b.dst) <= maxSize { + b.dst = make([]byte, 0, maxSize+1) + } + return nil +} + +// sendEOF will make the decoder send EOF on this frame. +func (b *blockDec) sendErr(err error) { + b.Last = true + b.Type = blockTypeReserved + b.err = err +} + +// Close will release resources. +// Closed blockDec cannot be reset. +func (b *blockDec) Close() { +} + +// decodeBuf +func (b *blockDec) decodeBuf(hist *history) error { + switch b.Type { + case blockTypeRLE: + if cap(b.dst) < int(b.RLESize) { + if b.lowMem { + b.dst = make([]byte, b.RLESize) + } else { + b.dst = make([]byte, maxCompressedBlockSize) + } + } + b.dst = b.dst[:b.RLESize] + v := b.data[0] + for i := range b.dst { + b.dst[i] = v + } + hist.appendKeep(b.dst) + return nil + case blockTypeRaw: + hist.appendKeep(b.data) + return nil + case blockTypeCompressed: + saved := b.dst + // Append directly to history + if hist.ignoreBuffer == 0 { + b.dst = hist.b + hist.b = nil + } else { + b.dst = b.dst[:0] + } + err := b.decodeCompressed(hist) + if debugDecoder { + println("Decompressed to total", len(b.dst), "bytes, hash:", xxhash.Sum64(b.dst), "error:", err) + } + if hist.ignoreBuffer == 0 { + hist.b = b.dst + b.dst = saved + } else { + hist.appendKeep(b.dst) + } + return err + case blockTypeReserved: + // Used for returning errors. + return b.err + default: + panic("Invalid block type") + } +} + +func (b *blockDec) decodeLiterals(in []byte, hist *history) (remain []byte, err error) { + // There must be at least one byte for Literals_Block_Type and one for Sequences_Section_Header + if len(in) < 2 { + return in, ErrBlockTooSmall + } + + litType := literalsBlockType(in[0] & 3) + var litRegenSize int + var litCompSize int + sizeFormat := (in[0] >> 2) & 3 + var fourStreams bool + var literals []byte + switch litType { + case literalsBlockRaw, literalsBlockRLE: + switch sizeFormat { + case 0, 2: + // Regenerated_Size uses 5 bits (0-31). Literals_Section_Header uses 1 byte. + litRegenSize = int(in[0] >> 3) + in = in[1:] + case 1: + // Regenerated_Size uses 12 bits (0-4095). Literals_Section_Header uses 2 bytes. + litRegenSize = int(in[0]>>4) + (int(in[1]) << 4) + in = in[2:] + case 3: + // Regenerated_Size uses 20 bits (0-1048575). Literals_Section_Header uses 3 bytes. + if len(in) < 3 { + println("too small: litType:", litType, " sizeFormat", sizeFormat, len(in)) + return in, ErrBlockTooSmall + } + litRegenSize = int(in[0]>>4) + (int(in[1]) << 4) + (int(in[2]) << 12) + in = in[3:] + } + case literalsBlockCompressed, literalsBlockTreeless: + switch sizeFormat { + case 0, 1: + // Both Regenerated_Size and Compressed_Size use 10 bits (0-1023). + if len(in) < 3 { + println("too small: litType:", litType, " sizeFormat", sizeFormat, len(in)) + return in, ErrBlockTooSmall + } + n := uint64(in[0]>>4) + (uint64(in[1]) << 4) + (uint64(in[2]) << 12) + litRegenSize = int(n & 1023) + litCompSize = int(n >> 10) + fourStreams = sizeFormat == 1 + in = in[3:] + case 2: + fourStreams = true + if len(in) < 4 { + println("too small: litType:", litType, " sizeFormat", sizeFormat, len(in)) + return in, ErrBlockTooSmall + } + n := uint64(in[0]>>4) + (uint64(in[1]) << 4) + (uint64(in[2]) << 12) + (uint64(in[3]) << 20) + litRegenSize = int(n & 16383) + litCompSize = int(n >> 14) + in = in[4:] + case 3: + fourStreams = true + if len(in) < 5 { + println("too small: litType:", litType, " sizeFormat", sizeFormat, len(in)) + return in, ErrBlockTooSmall + } + n := uint64(in[0]>>4) + (uint64(in[1]) << 4) + (uint64(in[2]) << 12) + (uint64(in[3]) << 20) + (uint64(in[4]) << 28) + litRegenSize = int(n & 262143) + litCompSize = int(n >> 18) + in = in[5:] + } + } + if debugDecoder { + println("literals type:", litType, "litRegenSize:", litRegenSize, "litCompSize:", litCompSize, "sizeFormat:", sizeFormat, "4X:", fourStreams) + } + if litRegenSize > int(b.WindowSize) || litRegenSize > maxCompressedBlockSize { + return in, ErrWindowSizeExceeded + } + + switch litType { + case literalsBlockRaw: + if len(in) < litRegenSize { + println("too small: litType:", litType, " sizeFormat", sizeFormat, "remain:", len(in), "want:", litRegenSize) + return in, ErrBlockTooSmall + } + literals = in[:litRegenSize] + in = in[litRegenSize:] + //printf("Found %d uncompressed literals\n", litRegenSize) + case literalsBlockRLE: + if len(in) < 1 { + println("too small: litType:", litType, " sizeFormat", sizeFormat, "remain:", len(in), "want:", 1) + return in, ErrBlockTooSmall + } + if cap(b.literalBuf) < litRegenSize { + if b.lowMem { + b.literalBuf = make([]byte, litRegenSize, litRegenSize+compressedBlockOverAlloc) + } else { + b.literalBuf = make([]byte, litRegenSize, maxCompressedBlockSize+compressedBlockOverAlloc) + } + } + literals = b.literalBuf[:litRegenSize] + v := in[0] + for i := range literals { + literals[i] = v + } + in = in[1:] + if debugDecoder { + printf("Found %d RLE compressed literals\n", litRegenSize) + } + case literalsBlockTreeless: + if len(in) < litCompSize { + println("too small: litType:", litType, " sizeFormat", sizeFormat, "remain:", len(in), "want:", litCompSize) + return in, ErrBlockTooSmall + } + // Store compressed literals, so we defer decoding until we get history. + literals = in[:litCompSize] + in = in[litCompSize:] + if debugDecoder { + printf("Found %d compressed literals\n", litCompSize) + } + huff := hist.huffTree + if huff == nil { + return in, errors.New("literal block was treeless, but no history was defined") + } + // Ensure we have space to store it. + if cap(b.literalBuf) < litRegenSize { + if b.lowMem { + b.literalBuf = make([]byte, 0, litRegenSize+compressedBlockOverAlloc) + } else { + b.literalBuf = make([]byte, 0, maxCompressedBlockSize+compressedBlockOverAlloc) + } + } + var err error + // Use our out buffer. + huff.MaxDecodedSize = litRegenSize + if fourStreams { + literals, err = huff.Decoder().Decompress4X(b.literalBuf[:0:litRegenSize], literals) + } else { + literals, err = huff.Decoder().Decompress1X(b.literalBuf[:0:litRegenSize], literals) + } + // Make sure we don't leak our literals buffer + if err != nil { + println("decompressing literals:", err) + return in, err + } + if len(literals) != litRegenSize { + return in, fmt.Errorf("literal output size mismatch want %d, got %d", litRegenSize, len(literals)) + } + + case literalsBlockCompressed: + if len(in) < litCompSize { + println("too small: litType:", litType, " sizeFormat", sizeFormat, "remain:", len(in), "want:", litCompSize) + return in, ErrBlockTooSmall + } + literals = in[:litCompSize] + in = in[litCompSize:] + // Ensure we have space to store it. + if cap(b.literalBuf) < litRegenSize { + if b.lowMem { + b.literalBuf = make([]byte, 0, litRegenSize+compressedBlockOverAlloc) + } else { + b.literalBuf = make([]byte, 0, maxCompressedBlockSize+compressedBlockOverAlloc) + } + } + huff := hist.huffTree + if huff == nil || (hist.dict != nil && huff == hist.dict.litEnc) { + huff = huffDecoderPool.Get().(*huff0.Scratch) + if huff == nil { + huff = &huff0.Scratch{} + } + } + var err error + if debugDecoder { + println("huff table input:", len(literals), "CRC:", crc32.ChecksumIEEE(literals)) + } + huff, literals, err = huff0.ReadTable(literals, huff) + if err != nil { + println("reading huffman table:", err) + return in, err + } + hist.huffTree = huff + huff.MaxDecodedSize = litRegenSize + // Use our out buffer. + if fourStreams { + literals, err = huff.Decoder().Decompress4X(b.literalBuf[:0:litRegenSize], literals) + } else { + literals, err = huff.Decoder().Decompress1X(b.literalBuf[:0:litRegenSize], literals) + } + if err != nil { + println("decoding compressed literals:", err) + return in, err + } + // Make sure we don't leak our literals buffer + if len(literals) != litRegenSize { + return in, fmt.Errorf("literal output size mismatch want %d, got %d", litRegenSize, len(literals)) + } + // Re-cap to get extra size. + literals = b.literalBuf[:len(literals)] + if debugDecoder { + printf("Decompressed %d literals into %d bytes\n", litCompSize, litRegenSize) + } + } + hist.decoders.literals = literals + return in, nil +} + +// decodeCompressed will start decompressing a block. +func (b *blockDec) decodeCompressed(hist *history) error { + in := b.data + in, err := b.decodeLiterals(in, hist) + if err != nil { + return err + } + err = b.prepareSequences(in, hist) + if err != nil { + return err + } + if hist.decoders.nSeqs == 0 { + b.dst = append(b.dst, hist.decoders.literals...) + return nil + } + before := len(hist.decoders.out) + err = hist.decoders.decodeSync(hist.b[hist.ignoreBuffer:]) + if err != nil { + return err + } + if hist.decoders.maxSyncLen > 0 { + hist.decoders.maxSyncLen += uint64(before) + hist.decoders.maxSyncLen -= uint64(len(hist.decoders.out)) + } + b.dst = hist.decoders.out + hist.recentOffsets = hist.decoders.prevOffset + return nil +} + +func (b *blockDec) prepareSequences(in []byte, hist *history) (err error) { + if debugDecoder { + printf("prepareSequences: %d byte(s) input\n", len(in)) + } + // Decode Sequences + // https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#sequences-section + if len(in) < 1 { + return ErrBlockTooSmall + } + var nSeqs int + seqHeader := in[0] + switch { + case seqHeader < 128: + nSeqs = int(seqHeader) + in = in[1:] + case seqHeader < 255: + if len(in) < 2 { + return ErrBlockTooSmall + } + nSeqs = int(seqHeader-128)<<8 | int(in[1]) + in = in[2:] + case seqHeader == 255: + if len(in) < 3 { + return ErrBlockTooSmall + } + nSeqs = 0x7f00 + int(in[1]) + (int(in[2]) << 8) + in = in[3:] + } + if nSeqs == 0 && len(in) != 0 { + // When no sequences, there should not be any more data... + if debugDecoder { + printf("prepareSequences: 0 sequences, but %d byte(s) left on stream\n", len(in)) + } + return ErrUnexpectedBlockSize + } + + var seqs = &hist.decoders + seqs.nSeqs = nSeqs + if nSeqs > 0 { + if len(in) < 1 { + return ErrBlockTooSmall + } + br := byteReader{b: in, off: 0} + compMode := br.Uint8() + br.advance(1) + if debugDecoder { + printf("Compression modes: 0b%b", compMode) + } + if compMode&3 != 0 { + return errors.New("corrupt block: reserved bits not zero") + } + for i := range uint(3) { + mode := seqCompMode((compMode >> (6 - i*2)) & 3) + if debugDecoder { + println("Table", tableIndex(i), "is", mode) + } + var seq *sequenceDec + switch tableIndex(i) { + case tableLiteralLengths: + seq = &seqs.litLengths + case tableOffsets: + seq = &seqs.offsets + case tableMatchLengths: + seq = &seqs.matchLengths + default: + panic("unknown table") + } + switch mode { + case compModePredefined: + if seq.fse != nil && !seq.fse.preDefined { + fseDecoderPool.Put(seq.fse) + } + seq.fse = &fsePredef[i] + case compModeRLE: + if br.remain() < 1 { + return ErrBlockTooSmall + } + v := br.Uint8() + br.advance(1) + if seq.fse == nil || seq.fse.preDefined { + seq.fse = fseDecoderPool.Get().(*fseDecoder) + } + symb, err := decSymbolValue(v, symbolTableX[i]) + if err != nil { + printf("RLE Transform table (%v) error: %v", tableIndex(i), err) + return err + } + seq.fse.setRLE(symb) + if debugDecoder { + printf("RLE set to 0x%x, code: %v", symb, v) + } + case compModeFSE: + if debugDecoder { + println("Reading table for", tableIndex(i)) + } + if seq.fse == nil || seq.fse.preDefined { + seq.fse = fseDecoderPool.Get().(*fseDecoder) + } + err := seq.fse.readNCount(&br, uint16(maxTableSymbol[i])) + if err != nil { + println("Read table error:", err) + return err + } + err = seq.fse.transform(symbolTableX[i]) + if err != nil { + println("Transform table error:", err) + return err + } + if debugDecoder { + println("Read table ok", "symbolLen:", seq.fse.symbolLen) + } + case compModeRepeat: + seq.repeat = true + } + if br.overread() { + return io.ErrUnexpectedEOF + } + } + in = br.unread() + } + if debugDecoder { + println("Literals:", len(seqs.literals), "hash:", xxhash.Sum64(seqs.literals), "and", seqs.nSeqs, "sequences.") + } + + if nSeqs == 0 { + if len(b.sequence) > 0 { + b.sequence = b.sequence[:0] + } + return nil + } + br := seqs.br + if br == nil { + br = &bitReader{} + } + if err := br.init(in); err != nil { + return err + } + + if err := seqs.initialize(br, hist, b.dst); err != nil { + println("initializing sequences:", err) + return err + } + + return nil +} + +func (b *blockDec) decodeSequences(hist *history) error { + if cap(b.sequence) < hist.decoders.nSeqs { + if b.lowMem { + b.sequence = make([]seqVals, 0, hist.decoders.nSeqs) + } else { + b.sequence = make([]seqVals, 0, 0x7F00+0xffff) + } + } + b.sequence = b.sequence[:hist.decoders.nSeqs] + if hist.decoders.nSeqs == 0 { + hist.decoders.seqSize = len(hist.decoders.literals) + return nil + } + hist.decoders.windowSize = hist.windowSize + hist.decoders.prevOffset = hist.recentOffsets + + err := hist.decoders.decode(b.sequence) + hist.recentOffsets = hist.decoders.prevOffset + return err +} + +func (b *blockDec) executeSequences(hist *history) error { + hbytes := hist.b + if len(hbytes) > hist.windowSize { + hbytes = hbytes[len(hbytes)-hist.windowSize:] + // We do not need history anymore. + if hist.dict != nil { + hist.dict.content = nil + } + } + hist.decoders.windowSize = hist.windowSize + hist.decoders.out = b.dst[:0] + err := hist.decoders.execute(b.sequence, hbytes) + if err != nil { + return err + } + return b.updateHistory(hist) +} + +func (b *blockDec) updateHistory(hist *history) error { + if len(b.data) > maxCompressedBlockSize { + return fmt.Errorf("compressed block size too large (%d)", len(b.data)) + } + // Set output and release references. + b.dst = hist.decoders.out + hist.recentOffsets = hist.decoders.prevOffset + + if b.Last { + // if last block we don't care about history. + println("Last block, no history returned") + hist.b = hist.b[:0] + return nil + } else { + hist.append(b.dst) + if debugDecoder { + println("Finished block with ", len(b.sequence), "sequences. Added", len(b.dst), "to history, now length", len(hist.b)) + } + } + hist.decoders.out, hist.decoders.literals = nil, nil + + return nil +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/blockenc.go b/backend/vendor/github.com/klauspost/compress/zstd/blockenc.go new file mode 100644 index 0000000..fd35ea1 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/blockenc.go @@ -0,0 +1,892 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "errors" + "fmt" + "math" + "math/bits" + "slices" + + "github.com/klauspost/compress/huff0" +) + +type blockEnc struct { + size int + literals []byte + sequences []seq + coders seqCoders + litEnc *huff0.Scratch + dictLitEnc *huff0.Scratch + wr bitWriter + + extraLits int + output []byte + recentOffsets [3]uint32 + prevRecentOffsets [3]uint32 + + last bool + lowMem bool +} + +// init should be used once the block has been created. +// If called more than once, the effect is the same as calling reset. +func (b *blockEnc) init() { + if b.lowMem { + // 1K literals + if cap(b.literals) < 1<<10 { + b.literals = make([]byte, 0, 1<<10) + } + const defSeqs = 20 + if cap(b.sequences) < defSeqs { + b.sequences = make([]seq, 0, defSeqs) + } + // 1K + if cap(b.output) < 1<<10 { + b.output = make([]byte, 0, 1<<10) + } + } else { + if cap(b.literals) < maxCompressedBlockSize { + b.literals = make([]byte, 0, maxCompressedBlockSize) + } + const defSeqs = 2000 + if cap(b.sequences) < defSeqs { + b.sequences = make([]seq, 0, defSeqs) + } + if cap(b.output) < maxCompressedBlockSize { + b.output = make([]byte, 0, maxCompressedBlockSize) + } + } + + if b.coders.mlEnc == nil { + b.coders.mlEnc = &fseEncoder{} + b.coders.mlPrev = &fseEncoder{} + b.coders.ofEnc = &fseEncoder{} + b.coders.ofPrev = &fseEncoder{} + b.coders.llEnc = &fseEncoder{} + b.coders.llPrev = &fseEncoder{} + } + b.litEnc = &huff0.Scratch{WantLogLess: 4} + b.reset(nil) +} + +// initNewEncode can be used to reset offsets and encoders to the initial state. +func (b *blockEnc) initNewEncode() { + b.recentOffsets = [3]uint32{1, 4, 8} + b.litEnc.Reuse = huff0.ReusePolicyNone + b.coders.setPrev(nil, nil, nil) +} + +// reset will reset the block for a new encode, but in the same stream, +// meaning that state will be carried over, but the block content is reset. +// If a previous block is provided, the recent offsets are carried over. +func (b *blockEnc) reset(prev *blockEnc) { + b.extraLits = 0 + b.literals = b.literals[:0] + b.size = 0 + b.sequences = b.sequences[:0] + b.output = b.output[:0] + b.last = false + if prev != nil { + b.recentOffsets = prev.prevRecentOffsets + } + b.dictLitEnc = nil +} + +// reset will reset the block for a new encode, but in the same stream, +// meaning that state will be carried over, but the block content is reset. +// If a previous block is provided, the recent offsets are carried over. +func (b *blockEnc) swapEncoders(prev *blockEnc) { + b.coders.swap(&prev.coders) + b.litEnc, prev.litEnc = prev.litEnc, b.litEnc +} + +// blockHeader contains the information for a block header. +type blockHeader uint32 + +// setLast sets the 'last' indicator on a block. +func (h *blockHeader) setLast(b bool) { + if b { + *h = *h | 1 + } else { + const mask = (1 << 24) - 2 + *h = *h & mask + } +} + +// setSize will store the compressed size of a block. +func (h *blockHeader) setSize(v uint32) { + const mask = 7 + *h = (*h)&mask | blockHeader(v<<3) +} + +// setType sets the block type. +func (h *blockHeader) setType(t blockType) { + const mask = 1 | (((1 << 24) - 1) ^ 7) + *h = (*h & mask) | blockHeader(t<<1) +} + +// appendTo will append the block header to a slice. +func (h blockHeader) appendTo(b []byte) []byte { + return append(b, uint8(h), uint8(h>>8), uint8(h>>16)) +} + +// String returns a string representation of the block. +func (h blockHeader) String() string { + return fmt.Sprintf("Type: %d, Size: %d, Last:%t", (h>>1)&3, h>>3, h&1 == 1) +} + +// literalsHeader contains literals header information. +type literalsHeader uint64 + +// setType can be used to set the type of literal block. +func (h *literalsHeader) setType(t literalsBlockType) { + const mask = math.MaxUint64 - 3 + *h = (*h & mask) | literalsHeader(t) +} + +// setSize can be used to set a single size, for uncompressed and RLE content. +func (h *literalsHeader) setSize(regenLen int) { + inBits := bits.Len32(uint32(regenLen)) + // Only retain 2 bits + const mask = 3 + lh := uint64(*h & mask) + switch { + case inBits < 5: + lh |= (uint64(regenLen) << 3) | (1 << 60) + if debugEncoder { + got := int(lh>>3) & 0xff + if got != regenLen { + panic(fmt.Sprint("litRegenSize = ", regenLen, "(want) != ", got, "(got)")) + } + } + case inBits < 12: + lh |= (1 << 2) | (uint64(regenLen) << 4) | (2 << 60) + case inBits < 20: + lh |= (3 << 2) | (uint64(regenLen) << 4) | (3 << 60) + default: + panic(fmt.Errorf("internal error: block too big (%d)", regenLen)) + } + *h = literalsHeader(lh) +} + +// setSizes will set the size of a compressed literals section and the input length. +func (h *literalsHeader) setSizes(compLen, inLen int, single bool) { + compBits, inBits := bits.Len32(uint32(compLen)), bits.Len32(uint32(inLen)) + // Only retain 2 bits + const mask = 3 + lh := uint64(*h & mask) + switch { + case compBits <= 10 && inBits <= 10: + if !single { + lh |= 1 << 2 + } + lh |= (uint64(inLen) << 4) | (uint64(compLen) << (10 + 4)) | (3 << 60) + if debugEncoder { + const mmask = (1 << 24) - 1 + n := (lh >> 4) & mmask + if int(n&1023) != inLen { + panic(fmt.Sprint("regensize:", int(n&1023), "!=", inLen, inBits)) + } + if int(n>>10) != compLen { + panic(fmt.Sprint("compsize:", int(n>>10), "!=", compLen, compBits)) + } + } + case compBits <= 14 && inBits <= 14: + lh |= (2 << 2) | (uint64(inLen) << 4) | (uint64(compLen) << (14 + 4)) | (4 << 60) + if single { + panic("single stream used with more than 10 bits length.") + } + case compBits <= 18 && inBits <= 18: + lh |= (3 << 2) | (uint64(inLen) << 4) | (uint64(compLen) << (18 + 4)) | (5 << 60) + if single { + panic("single stream used with more than 10 bits length.") + } + default: + panic("internal error: block too big") + } + *h = literalsHeader(lh) +} + +// appendTo will append the literals header to a byte slice. +func (h literalsHeader) appendTo(b []byte) []byte { + size := uint8(h >> 60) + switch size { + case 1: + b = append(b, uint8(h)) + case 2: + b = append(b, uint8(h), uint8(h>>8)) + case 3: + b = append(b, uint8(h), uint8(h>>8), uint8(h>>16)) + case 4: + b = append(b, uint8(h), uint8(h>>8), uint8(h>>16), uint8(h>>24)) + case 5: + b = append(b, uint8(h), uint8(h>>8), uint8(h>>16), uint8(h>>24), uint8(h>>32)) + default: + panic(fmt.Errorf("internal error: literalsHeader has invalid size (%d)", size)) + } + return b +} + +// size returns the output size with currently set values. +func (h literalsHeader) size() int { + return int(h >> 60) +} + +func (h literalsHeader) String() string { + return fmt.Sprintf("Type: %d, SizeFormat: %d, Size: 0x%d, Bytes:%d", literalsBlockType(h&3), (h>>2)&3, h&((1<<60)-1)>>4, h>>60) +} + +// pushOffsets will push the recent offsets to the backup store. +func (b *blockEnc) pushOffsets() { + b.prevRecentOffsets = b.recentOffsets +} + +// pushOffsets will push the recent offsets to the backup store. +func (b *blockEnc) popOffsets() { + b.recentOffsets = b.prevRecentOffsets +} + +// matchOffset will adjust recent offsets and return the adjusted one, +// if it matches a previous offset. +func (b *blockEnc) matchOffset(offset, lits uint32) uint32 { + // Check if offset is one of the recent offsets. + // Adjusts the output offset accordingly. + // Gives a tiny bit of compression, typically around 1%. + if true { + if lits > 0 { + switch offset { + case b.recentOffsets[0]: + offset = 1 + case b.recentOffsets[1]: + b.recentOffsets[1] = b.recentOffsets[0] + b.recentOffsets[0] = offset + offset = 2 + case b.recentOffsets[2]: + b.recentOffsets[2] = b.recentOffsets[1] + b.recentOffsets[1] = b.recentOffsets[0] + b.recentOffsets[0] = offset + offset = 3 + default: + b.recentOffsets[2] = b.recentOffsets[1] + b.recentOffsets[1] = b.recentOffsets[0] + b.recentOffsets[0] = offset + offset += 3 + } + } else { + switch offset { + case b.recentOffsets[1]: + b.recentOffsets[1] = b.recentOffsets[0] + b.recentOffsets[0] = offset + offset = 1 + case b.recentOffsets[2]: + b.recentOffsets[2] = b.recentOffsets[1] + b.recentOffsets[1] = b.recentOffsets[0] + b.recentOffsets[0] = offset + offset = 2 + case b.recentOffsets[0] - 1: + b.recentOffsets[2] = b.recentOffsets[1] + b.recentOffsets[1] = b.recentOffsets[0] + b.recentOffsets[0] = offset + offset = 3 + default: + b.recentOffsets[2] = b.recentOffsets[1] + b.recentOffsets[1] = b.recentOffsets[0] + b.recentOffsets[0] = offset + offset += 3 + } + } + } else { + offset += 3 + } + return offset +} + +// encodeRaw can be used to set the output to a raw representation of supplied bytes. +func (b *blockEnc) encodeRaw(a []byte) { + var bh blockHeader + bh.setLast(b.last) + bh.setSize(uint32(len(a))) + bh.setType(blockTypeRaw) + b.output = bh.appendTo(b.output[:0]) + b.output = append(b.output, a...) + if debugEncoder { + println("Adding RAW block, length", len(a), "last:", b.last) + } +} + +// encodeRaw can be used to set the output to a raw representation of supplied bytes. +func (b *blockEnc) encodeRawTo(dst, src []byte) []byte { + var bh blockHeader + bh.setLast(b.last) + bh.setSize(uint32(len(src))) + bh.setType(blockTypeRaw) + dst = bh.appendTo(dst) + dst = append(dst, src...) + if debugEncoder { + println("Adding RAW block, length", len(src), "last:", b.last) + } + return dst +} + +// encodeLits can be used if the block is only litLen. +func (b *blockEnc) encodeLits(lits []byte, raw bool) error { + var bh blockHeader + bh.setLast(b.last) + bh.setSize(uint32(len(lits))) + + // Don't compress extremely small blocks + if len(lits) < 8 || (len(lits) < 32 && b.dictLitEnc == nil) || raw { + if debugEncoder { + println("Adding RAW block, length", len(lits), "last:", b.last) + } + bh.setType(blockTypeRaw) + b.output = bh.appendTo(b.output) + b.output = append(b.output, lits...) + return nil + } + + var ( + out []byte + reUsed, single bool + err error + ) + if b.dictLitEnc != nil { + b.litEnc.TransferCTable(b.dictLitEnc) + b.litEnc.Reuse = huff0.ReusePolicyAllow + b.dictLitEnc = nil + } + if len(lits) >= 1024 { + // Use 4 Streams. + out, reUsed, err = huff0.Compress4X(lits, b.litEnc) + } else if len(lits) > 16 { + // Use 1 stream + single = true + out, reUsed, err = huff0.Compress1X(lits, b.litEnc) + } else { + err = huff0.ErrIncompressible + } + if err == nil && len(out)+5 > len(lits) { + // If we are close, we may still be worse or equal to raw. + var lh literalsHeader + lh.setSizes(len(out), len(lits), single) + if len(out)+lh.size() >= len(lits) { + err = huff0.ErrIncompressible + } + } + switch err { + case huff0.ErrIncompressible: + if debugEncoder { + println("Adding RAW block, length", len(lits), "last:", b.last) + } + bh.setType(blockTypeRaw) + b.output = bh.appendTo(b.output) + b.output = append(b.output, lits...) + return nil + case huff0.ErrUseRLE: + if debugEncoder { + println("Adding RLE block, length", len(lits)) + } + bh.setType(blockTypeRLE) + b.output = bh.appendTo(b.output) + b.output = append(b.output, lits[0]) + return nil + case nil: + default: + return err + } + // Compressed... + // Now, allow reuse + b.litEnc.Reuse = huff0.ReusePolicyAllow + bh.setType(blockTypeCompressed) + var lh literalsHeader + if reUsed { + if debugEncoder { + println("Reused tree, compressed to", len(out)) + } + lh.setType(literalsBlockTreeless) + } else { + if debugEncoder { + println("New tree, compressed to", len(out), "tree size:", len(b.litEnc.OutTable)) + } + lh.setType(literalsBlockCompressed) + } + // Set sizes + lh.setSizes(len(out), len(lits), single) + bh.setSize(uint32(len(out) + lh.size() + 1)) + + // Write block headers. + b.output = bh.appendTo(b.output) + b.output = lh.appendTo(b.output) + // Add compressed data. + b.output = append(b.output, out...) + // No sequences. + b.output = append(b.output, 0) + return nil +} + +// encodeRLE will encode an RLE block. +func (b *blockEnc) encodeRLE(val byte, length uint32) { + var bh blockHeader + bh.setLast(b.last) + bh.setSize(length) + bh.setType(blockTypeRLE) + b.output = bh.appendTo(b.output) + b.output = append(b.output, val) +} + +// fuzzFseEncoder can be used to fuzz the FSE encoder. +func fuzzFseEncoder(data []byte) int { + if len(data) > maxSequences || len(data) < 2 { + return 0 + } + enc := fseEncoder{} + hist := enc.Histogram() + maxSym := uint8(0) + for i, v := range data { + v = v & 63 + data[i] = v + hist[v]++ + if v > maxSym { + maxSym = v + } + } + if maxSym == 0 { + // All 0 + return 0 + } + cnt := int(slices.Max(hist[:maxSym])) + if cnt == len(data) { + // RLE + return 0 + } + enc.HistogramFinished(maxSym, cnt) + err := enc.normalizeCount(len(data)) + if err != nil { + return 0 + } + _, err = enc.writeCount(nil) + if err != nil { + panic(err) + } + return 1 +} + +// encode will encode the block and append the output in b.output. +// Previous offset codes must be pushed if more blocks are expected. +func (b *blockEnc) encode(org []byte, raw, rawAllLits bool) error { + if len(b.sequences) == 0 { + return b.encodeLits(b.literals, rawAllLits) + } + if len(b.sequences) == 1 && len(org) > 0 && len(b.literals) <= 1 { + // Check common RLE cases. + seq := b.sequences[0] + if seq.litLen == uint32(len(b.literals)) && seq.offset-3 == 1 { + // Offset == 1 and 0 or 1 literals. + b.encodeRLE(org[0], b.sequences[0].matchLen+zstdMinMatch+seq.litLen) + return nil + } + } + + // We want some difference to at least account for the headers. + saved := b.size - len(b.literals) - (b.size >> 6) + if saved < 16 { + if org == nil { + return errIncompressible + } + b.popOffsets() + return b.encodeLits(org, rawAllLits) + } + + var bh blockHeader + var lh literalsHeader + bh.setLast(b.last) + bh.setType(blockTypeCompressed) + // Store offset of the block header. Needed when we know the size. + bhOffset := len(b.output) + b.output = bh.appendTo(b.output) + + var ( + out []byte + reUsed, single bool + err error + ) + if b.dictLitEnc != nil { + b.litEnc.TransferCTable(b.dictLitEnc) + b.litEnc.Reuse = huff0.ReusePolicyAllow + b.dictLitEnc = nil + } + if len(b.literals) >= 1024 && !raw { + // Use 4 Streams. + out, reUsed, err = huff0.Compress4X(b.literals, b.litEnc) + } else if len(b.literals) > 16 && !raw { + // Use 1 stream + single = true + out, reUsed, err = huff0.Compress1X(b.literals, b.litEnc) + } else { + err = huff0.ErrIncompressible + } + + if err == nil && len(out)+5 > len(b.literals) { + // If we are close, we may still be worse or equal to raw. + var lh literalsHeader + lh.setSize(len(b.literals)) + szRaw := lh.size() + lh.setSizes(len(out), len(b.literals), single) + szComp := lh.size() + if len(out)+szComp >= len(b.literals)+szRaw { + err = huff0.ErrIncompressible + } + } + switch err { + case huff0.ErrIncompressible: + lh.setType(literalsBlockRaw) + lh.setSize(len(b.literals)) + b.output = lh.appendTo(b.output) + b.output = append(b.output, b.literals...) + if debugEncoder { + println("Adding literals RAW, length", len(b.literals)) + } + case huff0.ErrUseRLE: + lh.setType(literalsBlockRLE) + lh.setSize(len(b.literals)) + b.output = lh.appendTo(b.output) + b.output = append(b.output, b.literals[0]) + if debugEncoder { + println("Adding literals RLE") + } + case nil: + // Compressed litLen... + if reUsed { + if debugEncoder { + println("reused tree") + } + lh.setType(literalsBlockTreeless) + } else { + if debugEncoder { + println("new tree, size:", len(b.litEnc.OutTable)) + } + lh.setType(literalsBlockCompressed) + if debugEncoder { + _, _, err := huff0.ReadTable(out, nil) + if err != nil { + panic(err) + } + } + } + lh.setSizes(len(out), len(b.literals), single) + if debugEncoder { + printf("Compressed %d literals to %d bytes", len(b.literals), len(out)) + println("Adding literal header:", lh) + } + b.output = lh.appendTo(b.output) + b.output = append(b.output, out...) + b.litEnc.Reuse = huff0.ReusePolicyAllow + if debugEncoder { + println("Adding literals compressed") + } + default: + if debugEncoder { + println("Adding literals ERROR:", err) + } + return err + } + // Sequence compression + + // Write the number of sequences + switch { + case len(b.sequences) < 128: + b.output = append(b.output, uint8(len(b.sequences))) + case len(b.sequences) < 0x7f00: // TODO: this could be wrong + n := len(b.sequences) + b.output = append(b.output, 128+uint8(n>>8), uint8(n)) + default: + n := len(b.sequences) - 0x7f00 + b.output = append(b.output, 255, uint8(n), uint8(n>>8)) + } + if debugEncoder { + println("Encoding", len(b.sequences), "sequences") + } + b.genCodes() + llEnc := b.coders.llEnc + ofEnc := b.coders.ofEnc + mlEnc := b.coders.mlEnc + err = llEnc.normalizeCount(len(b.sequences)) + if err != nil { + return err + } + err = ofEnc.normalizeCount(len(b.sequences)) + if err != nil { + return err + } + err = mlEnc.normalizeCount(len(b.sequences)) + if err != nil { + return err + } + + // Choose the best compression mode for each type. + // Will evaluate the new vs predefined and previous. + chooseComp := func(cur, prev, preDef *fseEncoder) (*fseEncoder, seqCompMode) { + // See if predefined/previous is better + hist := cur.count[:cur.symbolLen] + nSize := cur.approxSize(hist) + cur.maxHeaderSize() + predefSize := preDef.approxSize(hist) + prevSize := prev.approxSize(hist) + + // Add a small penalty for new encoders. + // Don't bother with extremely small (<2 byte gains). + nSize = nSize + (nSize+2*8*16)>>4 + switch { + case predefSize <= prevSize && predefSize <= nSize || forcePreDef: + if debugEncoder { + println("Using predefined", predefSize>>3, "<=", nSize>>3) + } + return preDef, compModePredefined + case prevSize <= nSize: + if debugEncoder { + println("Using previous", prevSize>>3, "<=", nSize>>3) + } + return prev, compModeRepeat + default: + if debugEncoder { + println("Using new, predef", predefSize>>3, ". previous:", prevSize>>3, ">", nSize>>3, "header max:", cur.maxHeaderSize()>>3, "bytes") + println("tl:", cur.actualTableLog, "symbolLen:", cur.symbolLen, "norm:", cur.norm[:cur.symbolLen], "hist", cur.count[:cur.symbolLen]) + } + return cur, compModeFSE + } + } + + // Write compression mode + var mode uint8 + if llEnc.useRLE { + mode |= uint8(compModeRLE) << 6 + llEnc.setRLE(b.sequences[0].llCode) + if debugEncoder { + println("llEnc.useRLE") + } + } else { + var m seqCompMode + llEnc, m = chooseComp(llEnc, b.coders.llPrev, &fsePredefEnc[tableLiteralLengths]) + mode |= uint8(m) << 6 + } + if ofEnc.useRLE { + mode |= uint8(compModeRLE) << 4 + ofEnc.setRLE(b.sequences[0].ofCode) + if debugEncoder { + println("ofEnc.useRLE") + } + } else { + var m seqCompMode + ofEnc, m = chooseComp(ofEnc, b.coders.ofPrev, &fsePredefEnc[tableOffsets]) + mode |= uint8(m) << 4 + } + + if mlEnc.useRLE { + mode |= uint8(compModeRLE) << 2 + mlEnc.setRLE(b.sequences[0].mlCode) + if debugEncoder { + println("mlEnc.useRLE, code: ", b.sequences[0].mlCode, "value", b.sequences[0].matchLen) + } + } else { + var m seqCompMode + mlEnc, m = chooseComp(mlEnc, b.coders.mlPrev, &fsePredefEnc[tableMatchLengths]) + mode |= uint8(m) << 2 + } + b.output = append(b.output, mode) + if debugEncoder { + printf("Compression modes: 0b%b", mode) + } + b.output, err = llEnc.writeCount(b.output) + if err != nil { + return err + } + start := len(b.output) + b.output, err = ofEnc.writeCount(b.output) + if err != nil { + return err + } + if false { + println("block:", b.output[start:], "tablelog", ofEnc.actualTableLog, "maxcount:", ofEnc.maxCount) + fmt.Printf("selected TableLog: %d, Symbol length: %d\n", ofEnc.actualTableLog, ofEnc.symbolLen) + for i, v := range ofEnc.norm[:ofEnc.symbolLen] { + fmt.Printf("%3d: %5d -> %4d \n", i, ofEnc.count[i], v) + } + } + b.output, err = mlEnc.writeCount(b.output) + if err != nil { + return err + } + + // Maybe in block? + wr := &b.wr + wr.reset(b.output) + + var ll, of, ml cState + + // Current sequence + seq := len(b.sequences) - 1 + s := b.sequences[seq] + llEnc.setBits(llBitsTable[:]) + mlEnc.setBits(mlBitsTable[:]) + ofEnc.setBits(nil) + + llTT, ofTT, mlTT := llEnc.ct.symbolTT[:256], ofEnc.ct.symbolTT[:256], mlEnc.ct.symbolTT[:256] + + // We have 3 bounds checks here (and in the loop). + // Since we are iterating backwards it is kinda hard to avoid. + llB, ofB, mlB := llTT[s.llCode], ofTT[s.ofCode], mlTT[s.mlCode] + ll.init(wr, &llEnc.ct, llB) + of.init(wr, &ofEnc.ct, ofB) + wr.flush32() + ml.init(wr, &mlEnc.ct, mlB) + + // Each of these lookups also generates a bounds check. + wr.addBits32NC(s.litLen, llB.outBits) + wr.addBits32NC(s.matchLen, mlB.outBits) + wr.flush32() + wr.addBits32NC(s.offset, ofB.outBits) + if debugSequences { + println("Encoded seq", seq, s, "codes:", s.llCode, s.mlCode, s.ofCode, "states:", ll.state, ml.state, of.state, "bits:", llB, mlB, ofB) + } + seq-- + // Store sequences in reverse... + for seq >= 0 { + s = b.sequences[seq] + + ofB := ofTT[s.ofCode] + wr.flush32() // tablelog max is below 8 for each, so it will fill max 24 bits. + //of.encode(ofB) + nbBitsOut := (uint32(of.state) + ofB.deltaNbBits) >> 16 + dstState := int32(of.state>>(nbBitsOut&15)) + int32(ofB.deltaFindState) + wr.addBits16NC(of.state, uint8(nbBitsOut)) + of.state = of.stateTable[dstState] + + // Accumulate extra bits. + outBits := ofB.outBits & 31 + extraBits := uint64(s.offset & bitMask32[outBits]) + extraBitsN := outBits + + mlB := mlTT[s.mlCode] + //ml.encode(mlB) + nbBitsOut = (uint32(ml.state) + mlB.deltaNbBits) >> 16 + dstState = int32(ml.state>>(nbBitsOut&15)) + int32(mlB.deltaFindState) + wr.addBits16NC(ml.state, uint8(nbBitsOut)) + ml.state = ml.stateTable[dstState] + + outBits = mlB.outBits & 31 + extraBits = extraBits<> 16 + dstState = int32(ll.state>>(nbBitsOut&15)) + int32(llB.deltaFindState) + wr.addBits16NC(ll.state, uint8(nbBitsOut)) + ll.state = ll.stateTable[dstState] + + outBits = llB.outBits & 31 + extraBits = extraBits<= b.size { + // Discard and encode as raw block. + b.output = b.encodeRawTo(b.output[:bhOffset], org) + b.popOffsets() + b.litEnc.Reuse = huff0.ReusePolicyNone + return nil + } + + // Size is output minus block header. + bh.setSize(uint32(len(b.output)-bhOffset) - 3) + if debugEncoder { + println("Rewriting block header", bh) + } + _ = bh.appendTo(b.output[bhOffset:bhOffset]) + b.coders.setPrev(llEnc, mlEnc, ofEnc) + return nil +} + +var errIncompressible = errors.New("incompressible") + +func (b *blockEnc) genCodes() { + if len(b.sequences) == 0 { + // nothing to do + return + } + if len(b.sequences) > math.MaxUint16 { + panic("can only encode up to 64K sequences") + } + // No bounds checks after here: + llH := b.coders.llEnc.Histogram() + ofH := b.coders.ofEnc.Histogram() + mlH := b.coders.mlEnc.Histogram() + for i := range llH { + llH[i] = 0 + } + for i := range ofH { + ofH[i] = 0 + } + for i := range mlH { + mlH[i] = 0 + } + + var llMax, ofMax, mlMax uint8 + for i := range b.sequences { + seq := &b.sequences[i] + v := llCode(seq.litLen) + seq.llCode = v + llH[v]++ + if v > llMax { + llMax = v + } + + v = ofCode(seq.offset) + seq.ofCode = v + ofH[v]++ + if v > ofMax { + ofMax = v + } + + v = mlCode(seq.matchLen) + seq.mlCode = v + mlH[v]++ + if v > mlMax { + mlMax = v + if debugAsserts && mlMax > maxMatchLengthSymbol { + panic(fmt.Errorf("mlMax > maxMatchLengthSymbol (%d), matchlen: %d", mlMax, seq.matchLen)) + } + } + } + if debugAsserts && mlMax > maxMatchLengthSymbol { + panic(fmt.Errorf("mlMax > maxMatchLengthSymbol (%d)", mlMax)) + } + if debugAsserts && ofMax > maxOffsetBits { + panic(fmt.Errorf("ofMax > maxOffsetBits (%d)", ofMax)) + } + if debugAsserts && llMax > maxLiteralLengthSymbol { + panic(fmt.Errorf("llMax > maxLiteralLengthSymbol (%d)", llMax)) + } + + b.coders.mlEnc.HistogramFinished(mlMax, int(slices.Max(mlH[:mlMax+1]))) + b.coders.ofEnc.HistogramFinished(ofMax, int(slices.Max(ofH[:ofMax+1]))) + b.coders.llEnc.HistogramFinished(llMax, int(slices.Max(llH[:llMax+1]))) +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/blocktype_string.go b/backend/vendor/github.com/klauspost/compress/zstd/blocktype_string.go new file mode 100644 index 0000000..01a01e4 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/blocktype_string.go @@ -0,0 +1,85 @@ +// Code generated by "stringer -type=blockType,literalsBlockType,seqCompMode,tableIndex"; DO NOT EDIT. + +package zstd + +import "strconv" + +func _() { + // An "invalid array index" compiler error signifies that the constant values have changed. + // Re-run the stringer command to generate them again. + var x [1]struct{} + _ = x[blockTypeRaw-0] + _ = x[blockTypeRLE-1] + _ = x[blockTypeCompressed-2] + _ = x[blockTypeReserved-3] +} + +const _blockType_name = "blockTypeRawblockTypeRLEblockTypeCompressedblockTypeReserved" + +var _blockType_index = [...]uint8{0, 12, 24, 43, 60} + +func (i blockType) String() string { + if i >= blockType(len(_blockType_index)-1) { + return "blockType(" + strconv.FormatInt(int64(i), 10) + ")" + } + return _blockType_name[_blockType_index[i]:_blockType_index[i+1]] +} +func _() { + // An "invalid array index" compiler error signifies that the constant values have changed. + // Re-run the stringer command to generate them again. + var x [1]struct{} + _ = x[literalsBlockRaw-0] + _ = x[literalsBlockRLE-1] + _ = x[literalsBlockCompressed-2] + _ = x[literalsBlockTreeless-3] +} + +const _literalsBlockType_name = "literalsBlockRawliteralsBlockRLEliteralsBlockCompressedliteralsBlockTreeless" + +var _literalsBlockType_index = [...]uint8{0, 16, 32, 55, 76} + +func (i literalsBlockType) String() string { + if i >= literalsBlockType(len(_literalsBlockType_index)-1) { + return "literalsBlockType(" + strconv.FormatInt(int64(i), 10) + ")" + } + return _literalsBlockType_name[_literalsBlockType_index[i]:_literalsBlockType_index[i+1]] +} +func _() { + // An "invalid array index" compiler error signifies that the constant values have changed. + // Re-run the stringer command to generate them again. + var x [1]struct{} + _ = x[compModePredefined-0] + _ = x[compModeRLE-1] + _ = x[compModeFSE-2] + _ = x[compModeRepeat-3] +} + +const _seqCompMode_name = "compModePredefinedcompModeRLEcompModeFSEcompModeRepeat" + +var _seqCompMode_index = [...]uint8{0, 18, 29, 40, 54} + +func (i seqCompMode) String() string { + if i >= seqCompMode(len(_seqCompMode_index)-1) { + return "seqCompMode(" + strconv.FormatInt(int64(i), 10) + ")" + } + return _seqCompMode_name[_seqCompMode_index[i]:_seqCompMode_index[i+1]] +} +func _() { + // An "invalid array index" compiler error signifies that the constant values have changed. + // Re-run the stringer command to generate them again. + var x [1]struct{} + _ = x[tableLiteralLengths-0] + _ = x[tableOffsets-1] + _ = x[tableMatchLengths-2] +} + +const _tableIndex_name = "tableLiteralLengthstableOffsetstableMatchLengths" + +var _tableIndex_index = [...]uint8{0, 19, 31, 48} + +func (i tableIndex) String() string { + if i >= tableIndex(len(_tableIndex_index)-1) { + return "tableIndex(" + strconv.FormatInt(int64(i), 10) + ")" + } + return _tableIndex_name[_tableIndex_index[i]:_tableIndex_index[i+1]] +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/bytebuf.go b/backend/vendor/github.com/klauspost/compress/zstd/bytebuf.go new file mode 100644 index 0000000..55a3885 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/bytebuf.go @@ -0,0 +1,131 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "fmt" + "io" +) + +type byteBuffer interface { + // Read up to 8 bytes. + // Returns io.ErrUnexpectedEOF if this cannot be satisfied. + readSmall(n int) ([]byte, error) + + // Read >8 bytes. + // MAY use the destination slice. + readBig(n int, dst []byte) ([]byte, error) + + // Read a single byte. + readByte() (byte, error) + + // Skip n bytes. + skipN(n int64) error +} + +// in-memory buffer +type byteBuf []byte + +func (b *byteBuf) readSmall(n int) ([]byte, error) { + if debugAsserts && n > 8 { + panic(fmt.Errorf("small read > 8 (%d). use readBig", n)) + } + bb := *b + if len(bb) < n { + return nil, io.ErrUnexpectedEOF + } + r := bb[:n] + *b = bb[n:] + return r, nil +} + +func (b *byteBuf) readBig(n int, dst []byte) ([]byte, error) { + bb := *b + if len(bb) < n { + return nil, io.ErrUnexpectedEOF + } + r := bb[:n] + *b = bb[n:] + return r, nil +} + +func (b *byteBuf) readByte() (byte, error) { + bb := *b + if len(bb) < 1 { + return 0, io.ErrUnexpectedEOF + } + r := bb[0] + *b = bb[1:] + return r, nil +} + +func (b *byteBuf) skipN(n int64) error { + bb := *b + if n < 0 { + return fmt.Errorf("negative skip (%d) requested", n) + } + if int64(len(bb)) < n { + return io.ErrUnexpectedEOF + } + *b = bb[n:] + return nil +} + +// wrapper around a reader. +type readerWrapper struct { + r io.Reader + tmp [8]byte +} + +func (r *readerWrapper) readSmall(n int) ([]byte, error) { + if debugAsserts && n > 8 { + panic(fmt.Errorf("small read > 8 (%d). use readBig", n)) + } + n2, err := io.ReadFull(r.r, r.tmp[:n]) + // We only really care about the actual bytes read. + if err != nil { + if err == io.EOF { + return nil, io.ErrUnexpectedEOF + } + if debugDecoder { + println("readSmall: got", n2, "want", n, "err", err) + } + return nil, err + } + return r.tmp[:n], nil +} + +func (r *readerWrapper) readBig(n int, dst []byte) ([]byte, error) { + if cap(dst) < n { + dst = make([]byte, n) + } + n2, err := io.ReadFull(r.r, dst[:n]) + if err == io.EOF && n > 0 { + err = io.ErrUnexpectedEOF + } + return dst[:n2], err +} + +func (r *readerWrapper) readByte() (byte, error) { + n2, err := io.ReadFull(r.r, r.tmp[:1]) + if err != nil { + if err == io.EOF { + err = io.ErrUnexpectedEOF + } + return 0, err + } + if n2 != 1 { + return 0, io.ErrUnexpectedEOF + } + return r.tmp[0], nil +} + +func (r *readerWrapper) skipN(n int64) error { + n2, err := io.CopyN(io.Discard, r.r, n) + if n2 != n { + err = io.ErrUnexpectedEOF + } + return err +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/bytereader.go b/backend/vendor/github.com/klauspost/compress/zstd/bytereader.go new file mode 100644 index 0000000..0e59a24 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/bytereader.go @@ -0,0 +1,82 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +// byteReader provides a byte reader that reads +// little endian values from a byte stream. +// The input stream is manually advanced. +// The reader performs no bounds checks. +type byteReader struct { + b []byte + off int +} + +// advance the stream b n bytes. +func (b *byteReader) advance(n uint) { + b.off += int(n) +} + +// overread returns whether we have advanced too far. +func (b *byteReader) overread() bool { + return b.off > len(b.b) +} + +// Int32 returns a little endian int32 starting at current offset. +func (b byteReader) Int32() int32 { + b2 := b.b[b.off:] + b2 = b2[:4] + v3 := int32(b2[3]) + v2 := int32(b2[2]) + v1 := int32(b2[1]) + v0 := int32(b2[0]) + return v0 | (v1 << 8) | (v2 << 16) | (v3 << 24) +} + +// Uint8 returns the next byte +func (b *byteReader) Uint8() uint8 { + v := b.b[b.off] + return v +} + +// Uint32 returns a little endian uint32 starting at current offset. +func (b byteReader) Uint32() uint32 { + if r := b.remain(); r < 4 { + // Very rare + v := uint32(0) + for i := 1; i <= r; i++ { + v = (v << 8) | uint32(b.b[len(b.b)-i]) + } + return v + } + b2 := b.b[b.off:] + b2 = b2[:4] + v3 := uint32(b2[3]) + v2 := uint32(b2[2]) + v1 := uint32(b2[1]) + v0 := uint32(b2[0]) + return v0 | (v1 << 8) | (v2 << 16) | (v3 << 24) +} + +// Uint32NC returns a little endian uint32 starting at current offset. +// The caller must be sure if there are at least 4 bytes left. +func (b byteReader) Uint32NC() uint32 { + b2 := b.b[b.off:] + b2 = b2[:4] + v3 := uint32(b2[3]) + v2 := uint32(b2[2]) + v1 := uint32(b2[1]) + v0 := uint32(b2[0]) + return v0 | (v1 << 8) | (v2 << 16) | (v3 << 24) +} + +// unread returns the unread portion of the input. +func (b byteReader) unread() []byte { + return b.b[b.off:] +} + +// remain will return the number of bytes remaining. +func (b byteReader) remain() int { + return len(b.b) - b.off +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/decodeheader.go b/backend/vendor/github.com/klauspost/compress/zstd/decodeheader.go new file mode 100644 index 0000000..6a5a298 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/decodeheader.go @@ -0,0 +1,261 @@ +// Copyright 2020+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. + +package zstd + +import ( + "encoding/binary" + "errors" + "io" +) + +// HeaderMaxSize is the maximum size of a Frame and Block Header. +// If less is sent to Header.Decode it *may* still contain enough information. +const HeaderMaxSize = 14 + 3 + +// Header contains information about the first frame and block within that. +type Header struct { + // SingleSegment specifies whether the data is to be decompressed into a + // single contiguous memory segment. + // It implies that WindowSize is invalid and that FrameContentSize is valid. + SingleSegment bool + + // WindowSize is the window of data to keep while decoding. + // Will only be set if SingleSegment is false. + WindowSize uint64 + + // Dictionary ID. + // If 0, no dictionary. + DictionaryID uint32 + + // HasFCS specifies whether FrameContentSize has a valid value. + HasFCS bool + + // FrameContentSize is the expected uncompressed size of the entire frame. + FrameContentSize uint64 + + // Skippable will be true if the frame is meant to be skipped. + // This implies that FirstBlock.OK is false. + Skippable bool + + // SkippableID is the user-specific ID for the skippable frame. + // Valid values are between 0 to 15, inclusive. + SkippableID int + + // SkippableSize is the length of the user data to skip following + // the header. + SkippableSize uint32 + + // HeaderSize is the raw size of the frame header. + // + // For normal frames, it includes the size of the magic number and + // the size of the header (per section 3.1.1.1). + // It does not include the size for any data blocks (section 3.1.1.2) nor + // the size for the trailing content checksum. + // + // For skippable frames, this counts the size of the magic number + // along with the size of the size field of the payload. + // It does not include the size of the skippable payload itself. + // The total frame size is the HeaderSize plus the SkippableSize. + HeaderSize int + + // First block information. + FirstBlock struct { + // OK will be set if first block could be decoded. + OK bool + + // Is this the last block of a frame? + Last bool + + // Is the data compressed? + // If true CompressedSize will be populated. + // Unfortunately DecompressedSize cannot be determined + // without decoding the blocks. + Compressed bool + + // DecompressedSize is the expected decompressed size of the block. + // Will be 0 if it cannot be determined. + DecompressedSize int + + // CompressedSize of the data in the block. + // Does not include the block header. + // Will be equal to DecompressedSize if not Compressed. + CompressedSize int + } + + // If set there is a checksum present for the block content. + // The checksum field at the end is always 4 bytes long. + HasCheckSum bool +} + +// Decode the header from the beginning of the stream. +// This will decode the frame header and the first block header if enough bytes are provided. +// It is recommended to provide at least HeaderMaxSize bytes. +// If the frame header cannot be read an error will be returned. +// If there isn't enough input, io.ErrUnexpectedEOF is returned. +// The FirstBlock.OK will indicate if enough information was available to decode the first block header. +func (h *Header) Decode(in []byte) error { + _, err := h.DecodeAndStrip(in) + return err +} + +// DecodeAndStrip will decode the header from the beginning of the stream +// and on success return the remaining bytes. +// This will decode the frame header and the first block header if enough bytes are provided. +// It is recommended to provide at least HeaderMaxSize bytes. +// If the frame header cannot be read an error will be returned. +// If there isn't enough input, io.ErrUnexpectedEOF is returned. +// The FirstBlock.OK will indicate if enough information was available to decode the first block header. +func (h *Header) DecodeAndStrip(in []byte) (remain []byte, err error) { + *h = Header{} + if len(in) < 4 { + return nil, io.ErrUnexpectedEOF + } + h.HeaderSize += 4 + b, in := in[:4], in[4:] + if string(b) != frameMagic { + if string(b[1:4]) != skippableFrameMagic || b[0]&0xf0 != 0x50 { + return nil, ErrMagicMismatch + } + if len(in) < 4 { + return nil, io.ErrUnexpectedEOF + } + h.HeaderSize += 4 + h.Skippable = true + h.SkippableID = int(b[0] & 0xf) + h.SkippableSize = binary.LittleEndian.Uint32(in) + return in[4:], nil + } + + // Read Window_Descriptor + // https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#window_descriptor + if len(in) < 1 { + return nil, io.ErrUnexpectedEOF + } + fhd, in := in[0], in[1:] + h.HeaderSize++ + h.SingleSegment = fhd&(1<<5) != 0 + h.HasCheckSum = fhd&(1<<2) != 0 + if fhd&(1<<3) != 0 { + return nil, errors.New("reserved bit set on frame header") + } + + if !h.SingleSegment { + if len(in) < 1 { + return nil, io.ErrUnexpectedEOF + } + var wd byte + wd, in = in[0], in[1:] + h.HeaderSize++ + windowLog := 10 + (wd >> 3) + windowBase := uint64(1) << windowLog + windowAdd := (windowBase / 8) * uint64(wd&0x7) + h.WindowSize = windowBase + windowAdd + } + + // Read Dictionary_ID + // https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#dictionary_id + if size := fhd & 3; size != 0 { + if size == 3 { + size = 4 + } + if len(in) < int(size) { + return nil, io.ErrUnexpectedEOF + } + b, in = in[:size], in[size:] + h.HeaderSize += int(size) + switch len(b) { + case 1: + h.DictionaryID = uint32(b[0]) + case 2: + h.DictionaryID = uint32(b[0]) | (uint32(b[1]) << 8) + case 4: + h.DictionaryID = uint32(b[0]) | (uint32(b[1]) << 8) | (uint32(b[2]) << 16) | (uint32(b[3]) << 24) + } + } + + // Read Frame_Content_Size + // https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#frame_content_size + var fcsSize int + v := fhd >> 6 + switch v { + case 0: + if h.SingleSegment { + fcsSize = 1 + } + default: + fcsSize = 1 << v + } + + if fcsSize > 0 { + h.HasFCS = true + if len(in) < fcsSize { + return nil, io.ErrUnexpectedEOF + } + b, in = in[:fcsSize], in[fcsSize:] + h.HeaderSize += int(fcsSize) + switch len(b) { + case 1: + h.FrameContentSize = uint64(b[0]) + case 2: + // When FCS_Field_Size is 2, the offset of 256 is added. + h.FrameContentSize = uint64(b[0]) | (uint64(b[1]) << 8) + 256 + case 4: + h.FrameContentSize = uint64(b[0]) | (uint64(b[1]) << 8) | (uint64(b[2]) << 16) | (uint64(b[3]) << 24) + case 8: + d1 := uint32(b[0]) | (uint32(b[1]) << 8) | (uint32(b[2]) << 16) | (uint32(b[3]) << 24) + d2 := uint32(b[4]) | (uint32(b[5]) << 8) | (uint32(b[6]) << 16) | (uint32(b[7]) << 24) + h.FrameContentSize = uint64(d1) | (uint64(d2) << 32) + } + } + + // Frame Header done, we will not fail from now on. + if len(in) < 3 { + return in, nil + } + tmp := in[:3] + bh := uint32(tmp[0]) | (uint32(tmp[1]) << 8) | (uint32(tmp[2]) << 16) + h.FirstBlock.Last = bh&1 != 0 + blockType := blockType((bh >> 1) & 3) + // find size. + cSize := int(bh >> 3) + switch blockType { + case blockTypeReserved: + return in, nil + case blockTypeRLE: + h.FirstBlock.Compressed = true + h.FirstBlock.DecompressedSize = cSize + h.FirstBlock.CompressedSize = 1 + case blockTypeCompressed: + h.FirstBlock.Compressed = true + h.FirstBlock.CompressedSize = cSize + case blockTypeRaw: + h.FirstBlock.DecompressedSize = cSize + h.FirstBlock.CompressedSize = cSize + default: + panic("Invalid block type") + } + + h.FirstBlock.OK = true + return in, nil +} + +// AppendTo will append the encoded header to the dst slice. +// There is no error checking performed on the header values. +func (h *Header) AppendTo(dst []byte) ([]byte, error) { + if h.Skippable { + magic := [4]byte{0x50, 0x2a, 0x4d, 0x18} + magic[0] |= byte(h.SkippableID & 0xf) + dst = append(dst, magic[:]...) + f := h.SkippableSize + return append(dst, uint8(f), uint8(f>>8), uint8(f>>16), uint8(f>>24)), nil + } + f := frameHeader{ + ContentSize: h.FrameContentSize, + WindowSize: uint32(h.WindowSize), + SingleSegment: h.SingleSegment, + Checksum: h.HasCheckSum, + DictID: h.DictionaryID, + } + return f.appendTo(dst), nil +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/decoder.go b/backend/vendor/github.com/klauspost/compress/zstd/decoder.go new file mode 100644 index 0000000..30df551 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/decoder.go @@ -0,0 +1,947 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "context" + "encoding/binary" + "io" + "sync" + + "github.com/klauspost/compress/zstd/internal/xxhash" +) + +// Decoder provides decoding of zstandard streams. +// The decoder has been designed to operate without allocations after a warmup. +// This means that you should store the decoder for best performance. +// To re-use a stream decoder, use the Reset(r io.Reader) error to switch to another stream. +// A decoder can safely be re-used even if the previous stream failed. +// To release the resources, you must call the Close() function on a decoder. +type Decoder struct { + o decoderOptions + + // Unreferenced decoders, ready for use. + decoders chan *blockDec + + // Current read position used for Reader functionality. + current decoderState + + // sync stream decoding + syncStream struct { + decodedFrame uint64 + br readerWrapper + enabled bool + inFrame bool + dstBuf []byte + } + + frame *frameDec + + // Custom dictionaries. + dicts map[uint32]*dict + + // streamWg is the waitgroup for all streams + streamWg sync.WaitGroup +} + +// decoderState is used for maintaining state when the decoder +// is used for streaming. +type decoderState struct { + // current block being written to stream. + decodeOutput + + // output in order to be written to stream. + output chan decodeOutput + + // cancel remaining output. + cancel context.CancelFunc + + // crc of current frame + crc *xxhash.Digest + + flushed bool +} + +var ( + // Check the interfaces we want to support. + _ = io.WriterTo(&Decoder{}) + _ = io.Reader(&Decoder{}) +) + +// NewReader creates a new decoder. +// A nil Reader can be provided in which case Reset can be used to start a decode. +// +// A Decoder can be used in two modes: +// +// 1) As a stream, or +// 2) For stateless decoding using DecodeAll. +// +// Only a single stream can be decoded concurrently, but the same decoder +// can run multiple concurrent stateless decodes. It is even possible to +// use stateless decodes while a stream is being decoded. +// +// The Reset function can be used to initiate a new stream, which will considerably +// reduce the allocations normally caused by NewReader. +func NewReader(r io.Reader, opts ...DOption) (*Decoder, error) { + initPredefined() + var d Decoder + d.o.setDefault() + for _, o := range opts { + err := o(&d.o) + if err != nil { + return nil, err + } + } + d.current.crc = xxhash.New() + d.current.flushed = true + + if r == nil { + d.current.err = ErrDecoderNilInput + } + + // Transfer option dicts. + d.dicts = make(map[uint32]*dict, len(d.o.dicts)) + for _, dc := range d.o.dicts { + d.dicts[dc.id] = dc + } + d.o.dicts = nil + + // Create decoders + d.decoders = make(chan *blockDec, d.o.concurrent) + for i := 0; i < d.o.concurrent; i++ { + dec := newBlockDec(d.o.lowMem) + dec.localFrame = newFrameDec(d.o) + d.decoders <- dec + } + + if r == nil { + return &d, nil + } + return &d, d.Reset(r) +} + +// Read bytes from the decompressed stream into p. +// Returns the number of bytes read and any error that occurred. +// When the stream is done, io.EOF will be returned. +func (d *Decoder) Read(p []byte) (int, error) { + var n int + for { + if len(d.current.b) > 0 { + filled := copy(p, d.current.b) + p = p[filled:] + d.current.b = d.current.b[filled:] + n += filled + } + if len(p) == 0 { + break + } + if len(d.current.b) == 0 { + // We have an error and no more data + if d.current.err != nil { + break + } + if !d.nextBlock(n == 0) { + return n, d.current.err + } + } + } + if len(d.current.b) > 0 { + if debugDecoder { + println("returning", n, "still bytes left:", len(d.current.b)) + } + // Only return error at end of block + return n, nil + } + if d.current.err != nil { + d.drainOutput() + } + if debugDecoder { + println("returning", n, d.current.err, len(d.decoders)) + } + return n, d.current.err +} + +// Reset will reset the decoder the supplied stream after the current has finished processing. +// Note that this functionality cannot be used after Close has been called. +// Reset can be called with a nil reader to release references to the previous reader. +// After being called with a nil reader, no other operations than Reset or DecodeAll or Close +// should be used. +func (d *Decoder) Reset(r io.Reader) error { + if d.current.err == ErrDecoderClosed { + return d.current.err + } + + d.drainOutput() + + d.syncStream.br.r = nil + if r == nil { + d.current.err = ErrDecoderNilInput + if len(d.current.b) > 0 { + d.current.b = d.current.b[:0] + } + d.current.flushed = true + return nil + } + + // If bytes buffer and < 5MB, do sync decoding anyway. + if bb, ok := r.(byter); ok && bb.Len() < d.o.decodeBufsBelow && !d.o.limitToCap { + bb2 := bb + if debugDecoder { + println("*bytes.Buffer detected, doing sync decode, len:", bb.Len()) + } + b := bb2.Bytes() + var dst []byte + if cap(d.syncStream.dstBuf) > 0 { + dst = d.syncStream.dstBuf[:0] + } + + dst, err := d.DecodeAll(b, dst) + if err == nil { + err = io.EOF + } + // Save output buffer + d.syncStream.dstBuf = dst + d.current.b = dst + d.current.err = err + d.current.flushed = true + if debugDecoder { + println("sync decode to", len(dst), "bytes, err:", err) + } + return nil + } + // Remove current block. + d.stashDecoder() + d.current.decodeOutput = decodeOutput{} + d.current.err = nil + d.current.flushed = false + d.current.d = nil + d.syncStream.dstBuf = nil + + // Ensure no-one else is still running... + d.streamWg.Wait() + if d.frame == nil { + d.frame = newFrameDec(d.o) + } + + if d.o.concurrent == 1 { + return d.startSyncDecoder(r) + } + + d.current.output = make(chan decodeOutput, d.o.concurrent) + ctx, cancel := context.WithCancel(context.Background()) + d.current.cancel = cancel + d.streamWg.Add(1) + go d.startStreamDecoder(ctx, r, d.current.output) + + return nil +} + +// drainOutput will drain the output until errEndOfStream is sent. +func (d *Decoder) drainOutput() { + if d.current.cancel != nil { + if debugDecoder { + println("cancelling current") + } + d.current.cancel() + d.current.cancel = nil + } + if d.current.d != nil { + if debugDecoder { + printf("re-adding current decoder %p, decoders: %d", d.current.d, len(d.decoders)) + } + d.decoders <- d.current.d + d.current.d = nil + d.current.b = nil + } + if d.current.output == nil || d.current.flushed { + println("current already flushed") + return + } + for v := range d.current.output { + if v.d != nil { + if debugDecoder { + printf("re-adding decoder %p", v.d) + } + d.decoders <- v.d + } + } + d.current.output = nil + d.current.flushed = true +} + +// WriteTo writes data to w until there's no more data to write or when an error occurs. +// The return value n is the number of bytes written. +// Any error encountered during the write is also returned. +func (d *Decoder) WriteTo(w io.Writer) (int64, error) { + var n int64 + for { + if len(d.current.b) > 0 { + n2, err2 := w.Write(d.current.b) + n += int64(n2) + if err2 != nil && (d.current.err == nil || d.current.err == io.EOF) { + d.current.err = err2 + } else if n2 != len(d.current.b) { + d.current.err = io.ErrShortWrite + } + } + if d.current.err != nil { + break + } + d.nextBlock(true) + } + err := d.current.err + if err != nil { + d.drainOutput() + } + if err == io.EOF { + err = nil + } + return n, err +} + +// DecodeAll allows stateless decoding of a blob of bytes. +// Output will be appended to dst, so if the destination size is known +// you can pre-allocate the destination slice to avoid allocations. +// DecodeAll can be used concurrently. +// The Decoder concurrency limits will be respected. +func (d *Decoder) DecodeAll(input, dst []byte) ([]byte, error) { + if d.decoders == nil { + return dst, ErrDecoderClosed + } + + // Grab a block decoder and frame decoder. + block := <-d.decoders + frame := block.localFrame + initialSize := len(dst) + defer func() { + if debugDecoder { + printf("re-adding decoder: %p", block) + } + frame.rawInput = nil + frame.bBuf = nil + if frame.history.decoders.br != nil { + frame.history.decoders.br.in = nil + frame.history.decoders.br.cursor = 0 + } + d.decoders <- block + }() + frame.bBuf = input + + for { + frame.history.reset() + err := frame.reset(&frame.bBuf) + if err != nil { + if err == io.EOF { + if debugDecoder { + println("frame reset return EOF") + } + return dst, nil + } + return dst, err + } + if err = d.setDict(frame); err != nil { + return nil, err + } + if frame.WindowSize > d.o.maxWindowSize { + if debugDecoder { + println("window size exceeded:", frame.WindowSize, ">", d.o.maxWindowSize) + } + return dst, ErrWindowSizeExceeded + } + if frame.FrameContentSize != fcsUnknown { + if frame.FrameContentSize > d.o.maxDecodedSize-uint64(len(dst)-initialSize) { + if debugDecoder { + println("decoder size exceeded; fcs:", frame.FrameContentSize, "> mcs:", d.o.maxDecodedSize-uint64(len(dst)-initialSize), "len:", len(dst)) + } + return dst, ErrDecoderSizeExceeded + } + if d.o.limitToCap && frame.FrameContentSize > uint64(cap(dst)-len(dst)) { + if debugDecoder { + println("decoder size exceeded; fcs:", frame.FrameContentSize, "> (cap-len)", cap(dst)-len(dst)) + } + return dst, ErrDecoderSizeExceeded + } + if cap(dst)-len(dst) < int(frame.FrameContentSize) { + dst2 := make([]byte, len(dst), len(dst)+int(frame.FrameContentSize)+compressedBlockOverAlloc) + copy(dst2, dst) + dst = dst2 + } + } + + if cap(dst) == 0 && !d.o.limitToCap { + // Allocate len(input) * 2 by default if nothing is provided + // and we didn't get frame content size. + size := min( + // Cap to 1 MB. + len(input)*2, 1<<20) + if uint64(size) > d.o.maxDecodedSize { + size = int(d.o.maxDecodedSize) + } + dst = make([]byte, 0, size) + } + + dst, err = frame.runDecoder(dst, block) + if err != nil { + return dst, err + } + if uint64(len(dst)-initialSize) > d.o.maxDecodedSize { + return dst, ErrDecoderSizeExceeded + } + if len(frame.bBuf) == 0 { + if debugDecoder { + println("frame dbuf empty") + } + break + } + } + return dst, nil +} + +// nextBlock returns the next block. +// If an error occurs d.err will be set. +// Optionally the function can block for new output. +// If non-blocking mode is used the returned boolean will be false +// if no data was available without blocking. +func (d *Decoder) nextBlock(blocking bool) (ok bool) { + if d.current.err != nil { + // Keep error state. + return false + } + d.current.b = d.current.b[:0] + + // SYNC: + if d.syncStream.enabled { + if !blocking { + return false + } + ok = d.nextBlockSync() + if !ok { + d.stashDecoder() + } + return ok + } + + //ASYNC: + d.stashDecoder() + if blocking { + d.current.decodeOutput, ok = <-d.current.output + } else { + select { + case d.current.decodeOutput, ok = <-d.current.output: + default: + return false + } + } + if !ok { + // This should not happen, so signal error state... + d.current.err = io.ErrUnexpectedEOF + return false + } + next := d.current.decodeOutput + if next.d != nil && next.d.async.newHist != nil { + d.current.crc.Reset() + } + if debugDecoder { + var tmp [4]byte + binary.LittleEndian.PutUint32(tmp[:], uint32(xxhash.Sum64(next.b))) + println("got", len(d.current.b), "bytes, error:", d.current.err, "data crc:", tmp) + } + + if d.o.ignoreChecksum { + return true + } + + if len(next.b) > 0 { + d.current.crc.Write(next.b) + } + if next.err == nil && next.d != nil && next.d.hasCRC { + got := uint32(d.current.crc.Sum64()) + if got != next.d.checkCRC { + if debugDecoder { + printf("CRC Check Failed: %08x (got) != %08x (on stream)\n", got, next.d.checkCRC) + } + d.current.err = ErrCRCMismatch + } else { + if debugDecoder { + printf("CRC ok %08x\n", got) + } + } + } + + return true +} + +func (d *Decoder) nextBlockSync() (ok bool) { + if d.current.d == nil { + d.current.d = <-d.decoders + } + for len(d.current.b) == 0 { + if !d.syncStream.inFrame { + d.frame.history.reset() + d.current.err = d.frame.reset(&d.syncStream.br) + if d.current.err == nil { + d.current.err = d.setDict(d.frame) + } + if d.current.err != nil { + return false + } + if d.frame.WindowSize > d.o.maxDecodedSize || d.frame.WindowSize > d.o.maxWindowSize { + d.current.err = ErrDecoderSizeExceeded + return false + } + + d.syncStream.decodedFrame = 0 + d.syncStream.inFrame = true + } + d.current.err = d.frame.next(d.current.d) + if d.current.err != nil { + return false + } + d.frame.history.ensureBlock() + if debugDecoder { + println("History trimmed:", len(d.frame.history.b), "decoded already:", d.syncStream.decodedFrame) + } + histBefore := len(d.frame.history.b) + d.current.err = d.current.d.decodeBuf(&d.frame.history) + + if d.current.err != nil { + println("error after:", d.current.err) + return false + } + d.current.b = d.frame.history.b[histBefore:] + if debugDecoder { + println("history after:", len(d.frame.history.b)) + } + + // Check frame size (before CRC) + d.syncStream.decodedFrame += uint64(len(d.current.b)) + if d.syncStream.decodedFrame > d.frame.FrameContentSize { + if debugDecoder { + printf("DecodedFrame (%d) > FrameContentSize (%d)\n", d.syncStream.decodedFrame, d.frame.FrameContentSize) + } + d.current.err = ErrFrameSizeExceeded + return false + } + + // Check FCS + if d.current.d.Last && d.frame.FrameContentSize != fcsUnknown && d.syncStream.decodedFrame != d.frame.FrameContentSize { + if debugDecoder { + printf("DecodedFrame (%d) != FrameContentSize (%d)\n", d.syncStream.decodedFrame, d.frame.FrameContentSize) + } + d.current.err = ErrFrameSizeMismatch + return false + } + + // Update/Check CRC + if d.frame.HasCheckSum { + if !d.o.ignoreChecksum { + d.frame.crc.Write(d.current.b) + } + if d.current.d.Last { + if !d.o.ignoreChecksum { + d.current.err = d.frame.checkCRC() + } else { + d.current.err = d.frame.consumeCRC() + } + if d.current.err != nil { + println("CRC error:", d.current.err) + return false + } + } + } + d.syncStream.inFrame = !d.current.d.Last + } + return true +} + +func (d *Decoder) stashDecoder() { + if d.current.d != nil { + if debugDecoder { + printf("re-adding current decoder %p", d.current.d) + } + d.decoders <- d.current.d + d.current.d = nil + } +} + +// Close will release all resources. +// It is NOT possible to reuse the decoder after this. +func (d *Decoder) Close() { + if d.current.err == ErrDecoderClosed { + return + } + d.drainOutput() + if d.current.cancel != nil { + d.current.cancel() + d.streamWg.Wait() + d.current.cancel = nil + } + if d.decoders != nil { + close(d.decoders) + for dec := range d.decoders { + dec.Close() + } + d.decoders = nil + } + if d.current.d != nil { + d.current.d.Close() + d.current.d = nil + } + d.current.err = ErrDecoderClosed +} + +// IOReadCloser returns the decoder as an io.ReadCloser for convenience. +// Any changes to the decoder will be reflected, so the returned ReadCloser +// can be reused along with the decoder. +// io.WriterTo is also supported by the returned ReadCloser. +func (d *Decoder) IOReadCloser() io.ReadCloser { + return closeWrapper{d: d} +} + +// closeWrapper wraps a function call as a closer. +type closeWrapper struct { + d *Decoder +} + +// WriteTo forwards WriteTo calls to the decoder. +func (c closeWrapper) WriteTo(w io.Writer) (n int64, err error) { + return c.d.WriteTo(w) +} + +// Read forwards read calls to the decoder. +func (c closeWrapper) Read(p []byte) (n int, err error) { + return c.d.Read(p) +} + +// Close closes the decoder. +func (c closeWrapper) Close() error { + c.d.Close() + return nil +} + +type decodeOutput struct { + d *blockDec + b []byte + err error +} + +func (d *Decoder) startSyncDecoder(r io.Reader) error { + d.frame.history.reset() + d.syncStream.br = readerWrapper{r: r} + d.syncStream.inFrame = false + d.syncStream.enabled = true + d.syncStream.decodedFrame = 0 + return nil +} + +// Create Decoder: +// ASYNC: +// Spawn 3 go routines. +// 0: Read frames and decode block literals. +// 1: Decode sequences. +// 2: Execute sequences, send to output. +func (d *Decoder) startStreamDecoder(ctx context.Context, r io.Reader, output chan decodeOutput) { + defer d.streamWg.Done() + br := readerWrapper{r: r} + + var seqDecode = make(chan *blockDec, d.o.concurrent) + var seqExecute = make(chan *blockDec, d.o.concurrent) + + // Async 1: Decode sequences... + go func() { + var hist history + var hasErr bool + + for block := range seqDecode { + if hasErr { + if block != nil { + seqExecute <- block + } + continue + } + if block.async.newHist != nil { + if debugDecoder { + println("Async 1: new history, recent:", block.async.newHist.recentOffsets) + } + hist.reset() + hist.decoders = block.async.newHist.decoders + hist.recentOffsets = block.async.newHist.recentOffsets + hist.windowSize = block.async.newHist.windowSize + if block.async.newHist.dict != nil { + hist.setDict(block.async.newHist.dict) + } + } + if block.err != nil || block.Type != blockTypeCompressed { + hasErr = block.err != nil + seqExecute <- block + continue + } + + hist.decoders.literals = block.async.literals + block.err = block.prepareSequences(block.async.seqData, &hist) + if debugDecoder && block.err != nil { + println("prepareSequences returned:", block.err) + } + hasErr = block.err != nil + if block.err == nil { + block.err = block.decodeSequences(&hist) + if debugDecoder && block.err != nil { + println("decodeSequences returned:", block.err) + } + hasErr = block.err != nil + // block.async.sequence = hist.decoders.seq[:hist.decoders.nSeqs] + block.async.seqSize = hist.decoders.seqSize + } + seqExecute <- block + } + close(seqExecute) + hist.reset() + }() + + var wg sync.WaitGroup + wg.Add(1) + + // Async 3: Execute sequences... + frameHistCache := d.frame.history.b + go func() { + var hist history + var decodedFrame uint64 + var fcs uint64 + var hasErr bool + for block := range seqExecute { + out := decodeOutput{err: block.err, d: block} + if block.err != nil || hasErr { + hasErr = true + output <- out + continue + } + if block.async.newHist != nil { + if debugDecoder { + println("Async 2: new history") + } + hist.reset() + hist.windowSize = block.async.newHist.windowSize + hist.allocFrameBuffer = block.async.newHist.allocFrameBuffer + if block.async.newHist.dict != nil { + hist.setDict(block.async.newHist.dict) + } + + if cap(hist.b) < hist.allocFrameBuffer { + if cap(frameHistCache) >= hist.allocFrameBuffer { + hist.b = frameHistCache + } else { + hist.b = make([]byte, 0, hist.allocFrameBuffer) + println("Alloc history sized", hist.allocFrameBuffer) + } + } + hist.b = hist.b[:0] + fcs = block.async.fcs + decodedFrame = 0 + } + do := decodeOutput{err: block.err, d: block} + switch block.Type { + case blockTypeRLE: + if debugDecoder { + println("add rle block length:", block.RLESize) + } + + if cap(block.dst) < int(block.RLESize) { + if block.lowMem { + block.dst = make([]byte, block.RLESize) + } else { + block.dst = make([]byte, maxCompressedBlockSize) + } + } + block.dst = block.dst[:block.RLESize] + v := block.data[0] + for i := range block.dst { + block.dst[i] = v + } + hist.append(block.dst) + do.b = block.dst + case blockTypeRaw: + if debugDecoder { + println("add raw block length:", len(block.data)) + } + hist.append(block.data) + do.b = block.data + case blockTypeCompressed: + if debugDecoder { + println("execute with history length:", len(hist.b), "window:", hist.windowSize) + } + hist.decoders.seqSize = block.async.seqSize + hist.decoders.literals = block.async.literals + do.err = block.executeSequences(&hist) + hasErr = do.err != nil + if debugDecoder && hasErr { + println("executeSequences returned:", do.err) + } + do.b = block.dst + } + if !hasErr { + decodedFrame += uint64(len(do.b)) + if decodedFrame > fcs { + println("fcs exceeded", block.Last, fcs, decodedFrame) + do.err = ErrFrameSizeExceeded + hasErr = true + } else if block.Last && fcs != fcsUnknown && decodedFrame != fcs { + do.err = ErrFrameSizeMismatch + hasErr = true + } else { + if debugDecoder { + println("fcs ok", block.Last, fcs, decodedFrame) + } + } + } + output <- do + } + close(output) + frameHistCache = hist.b + wg.Done() + if debugDecoder { + println("decoder goroutines finished") + } + hist.reset() + }() + + var hist history +decodeStream: + for { + var hasErr bool + hist.reset() + decodeBlock := func(block *blockDec) { + if hasErr { + if block != nil { + seqDecode <- block + } + return + } + if block.err != nil || block.Type != blockTypeCompressed { + hasErr = block.err != nil + seqDecode <- block + return + } + + remain, err := block.decodeLiterals(block.data, &hist) + block.err = err + hasErr = block.err != nil + if err == nil { + block.async.literals = hist.decoders.literals + block.async.seqData = remain + } else if debugDecoder { + println("decodeLiterals error:", err) + } + seqDecode <- block + } + frame := d.frame + if debugDecoder { + println("New frame...") + } + var historySent bool + frame.history.reset() + err := frame.reset(&br) + if debugDecoder && err != nil { + println("Frame decoder returned", err) + } + if err == nil { + err = d.setDict(frame) + } + if err == nil && d.frame.WindowSize > d.o.maxWindowSize { + if debugDecoder { + println("decoder size exceeded, fws:", d.frame.WindowSize, "> mws:", d.o.maxWindowSize) + } + + err = ErrDecoderSizeExceeded + } + if err != nil { + select { + case <-ctx.Done(): + case dec := <-d.decoders: + dec.sendErr(err) + decodeBlock(dec) + } + break decodeStream + } + + // Go through all blocks of the frame. + for { + var dec *blockDec + select { + case <-ctx.Done(): + break decodeStream + case dec = <-d.decoders: + // Once we have a decoder, we MUST return it. + } + err := frame.next(dec) + if !historySent { + h := frame.history + if debugDecoder { + println("Alloc History:", h.allocFrameBuffer) + } + hist.reset() + if h.dict != nil { + hist.setDict(h.dict) + } + dec.async.newHist = &h + dec.async.fcs = frame.FrameContentSize + historySent = true + } else { + dec.async.newHist = nil + } + if debugDecoder && err != nil { + println("next block returned error:", err) + } + dec.err = err + dec.hasCRC = false + if dec.Last && frame.HasCheckSum && err == nil { + crc, err := frame.rawInput.readSmall(4) + if len(crc) < 4 { + if err == nil { + err = io.ErrUnexpectedEOF + + } + println("CRC missing?", err) + dec.err = err + } else { + dec.checkCRC = binary.LittleEndian.Uint32(crc) + dec.hasCRC = true + if debugDecoder { + printf("found crc to check: %08x\n", dec.checkCRC) + } + } + } + err = dec.err + last := dec.Last + decodeBlock(dec) + if err != nil { + break decodeStream + } + if last { + break + } + } + } + close(seqDecode) + wg.Wait() + hist.reset() + d.frame.history.b = frameHistCache +} + +func (d *Decoder) setDict(frame *frameDec) (err error) { + dict, ok := d.dicts[frame.DictionaryID] + if ok { + if debugDecoder { + println("setting dict", frame.DictionaryID) + } + frame.history.setDict(dict) + } else if frame.DictionaryID != 0 { + // A zero or missing dictionary id is ambiguous: + // either dictionary zero, or no dictionary. In particular, + // zstd --patch-from uses this id for the source file, + // so only return an error if the dictionary id is not zero. + err = ErrUnknownDictionary + } + return err +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/decoder_options.go b/backend/vendor/github.com/klauspost/compress/zstd/decoder_options.go new file mode 100644 index 0000000..774c5f0 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/decoder_options.go @@ -0,0 +1,169 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "errors" + "fmt" + "math/bits" + "runtime" +) + +// DOption is an option for creating a decoder. +type DOption func(*decoderOptions) error + +// options retains accumulated state of multiple options. +type decoderOptions struct { + lowMem bool + concurrent int + maxDecodedSize uint64 + maxWindowSize uint64 + dicts []*dict + ignoreChecksum bool + limitToCap bool + decodeBufsBelow int +} + +func (o *decoderOptions) setDefault() { + *o = decoderOptions{ + // use less ram: true for now, but may change. + lowMem: true, + concurrent: runtime.GOMAXPROCS(0), + maxWindowSize: MaxWindowSize, + decodeBufsBelow: 128 << 10, + } + if o.concurrent > 4 { + o.concurrent = 4 + } + o.maxDecodedSize = 64 << 30 +} + +// WithDecoderLowmem will set whether to use a lower amount of memory, +// but possibly have to allocate more while running. +func WithDecoderLowmem(b bool) DOption { + return func(o *decoderOptions) error { o.lowMem = b; return nil } +} + +// WithDecoderConcurrency sets the number of created decoders. +// When decoding block with DecodeAll, this will limit the number +// of possible concurrently running decodes. +// When decoding streams, this will limit the number of +// inflight blocks. +// When decoding streams and setting maximum to 1, +// no async decoding will be done. +// When a value of 0 is provided GOMAXPROCS will be used. +// By default this will be set to 4 or GOMAXPROCS, whatever is lower. +func WithDecoderConcurrency(n int) DOption { + return func(o *decoderOptions) error { + if n < 0 { + return errors.New("concurrency must be at least 1") + } + if n == 0 { + o.concurrent = runtime.GOMAXPROCS(0) + } else { + o.concurrent = n + } + return nil + } +} + +// WithDecoderMaxMemory allows to set a maximum decoded size for in-memory +// non-streaming operations or maximum window size for streaming operations. +// This can be used to control memory usage of potentially hostile content. +// Maximum is 1 << 63 bytes. Default is 64GiB. +func WithDecoderMaxMemory(n uint64) DOption { + return func(o *decoderOptions) error { + if n == 0 { + return errors.New("WithDecoderMaxMemory must be at least 1") + } + if n > 1<<63 { + return errors.New("WithDecoderMaxmemory must be less than 1 << 63") + } + o.maxDecodedSize = n + return nil + } +} + +// WithDecoderDicts allows to register one or more dictionaries for the decoder. +// +// Each slice in dict must be in the [dictionary format] produced by +// "zstd --train" from the Zstandard reference implementation. +// +// If several dictionaries with the same ID are provided, the last one will be used. +// +// [dictionary format]: https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#dictionary-format +func WithDecoderDicts(dicts ...[]byte) DOption { + return func(o *decoderOptions) error { + for _, b := range dicts { + d, err := loadDict(b) + if err != nil { + return err + } + o.dicts = append(o.dicts, d) + } + return nil + } +} + +// WithDecoderDictRaw registers a dictionary that may be used by the decoder. +// The slice content can be arbitrary data. +func WithDecoderDictRaw(id uint32, content []byte) DOption { + return func(o *decoderOptions) error { + if bits.UintSize > 32 && uint(len(content)) > dictMaxLength { + return fmt.Errorf("dictionary of size %d > 2GiB too large", len(content)) + } + o.dicts = append(o.dicts, &dict{id: id, content: content, offsets: [3]int{1, 4, 8}}) + return nil + } +} + +// WithDecoderMaxWindow allows to set a maximum window size for decodes. +// This allows rejecting packets that will cause big memory usage. +// The Decoder will likely allocate more memory based on the WithDecoderLowmem setting. +// If WithDecoderMaxMemory is set to a lower value, that will be used. +// Default is 512MB, Maximum is ~3.75 TB as per zstandard spec. +func WithDecoderMaxWindow(size uint64) DOption { + return func(o *decoderOptions) error { + if size < MinWindowSize { + return errors.New("WithMaxWindowSize must be at least 1KB, 1024 bytes") + } + if size > (1<<41)+7*(1<<38) { + return errors.New("WithMaxWindowSize must be less than (1<<41) + 7*(1<<38) ~ 3.75TB") + } + o.maxWindowSize = size + return nil + } +} + +// WithDecodeAllCapLimit will limit DecodeAll to decoding cap(dst)-len(dst) bytes, +// or any size set in WithDecoderMaxMemory. +// This can be used to limit decoding to a specific maximum output size. +// Disabled by default. +func WithDecodeAllCapLimit(b bool) DOption { + return func(o *decoderOptions) error { + o.limitToCap = b + return nil + } +} + +// WithDecodeBuffersBelow will fully decode readers that have a +// `Bytes() []byte` and `Len() int` interface similar to bytes.Buffer. +// This typically uses less allocations but will have the full decompressed object in memory. +// Note that DecodeAllCapLimit will disable this, as well as giving a size of 0 or less. +// Default is 128KiB. +func WithDecodeBuffersBelow(size int) DOption { + return func(o *decoderOptions) error { + o.decodeBufsBelow = size + return nil + } +} + +// IgnoreChecksum allows to forcibly ignore checksum checking. +func IgnoreChecksum(b bool) DOption { + return func(o *decoderOptions) error { + o.ignoreChecksum = b + return nil + } +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/dict.go b/backend/vendor/github.com/klauspost/compress/zstd/dict.go new file mode 100644 index 0000000..2ffbfdf --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/dict.go @@ -0,0 +1,559 @@ +package zstd + +import ( + "bytes" + "encoding/binary" + "errors" + "fmt" + "io" + "math" + "sort" + + "github.com/klauspost/compress/huff0" +) + +type dict struct { + id uint32 + + litEnc *huff0.Scratch + llDec, ofDec, mlDec sequenceDec + offsets [3]int + content []byte +} + +const dictMagic = "\x37\xa4\x30\xec" + +// Maximum dictionary size for the reference implementation (1.5.3) is 2 GiB. +const dictMaxLength = 1 << 31 + +// ID returns the dictionary id or 0 if d is nil. +func (d *dict) ID() uint32 { + if d == nil { + return 0 + } + return d.id +} + +// ContentSize returns the dictionary content size or 0 if d is nil. +func (d *dict) ContentSize() int { + if d == nil { + return 0 + } + return len(d.content) +} + +// Content returns the dictionary content. +func (d *dict) Content() []byte { + if d == nil { + return nil + } + return d.content +} + +// Offsets returns the initial offsets. +func (d *dict) Offsets() [3]int { + if d == nil { + return [3]int{} + } + return d.offsets +} + +// LitEncoder returns the literal encoder. +func (d *dict) LitEncoder() *huff0.Scratch { + if d == nil { + return nil + } + return d.litEnc +} + +// Load a dictionary as described in +// https://github.com/facebook/zstd/blob/master/doc/zstd_compression_format.md#dictionary-format +func loadDict(b []byte) (*dict, error) { + // Check static field size. + if len(b) <= 8+(3*4) { + return nil, io.ErrUnexpectedEOF + } + d := dict{ + llDec: sequenceDec{fse: &fseDecoder{}}, + ofDec: sequenceDec{fse: &fseDecoder{}}, + mlDec: sequenceDec{fse: &fseDecoder{}}, + } + if string(b[:4]) != dictMagic { + return nil, ErrMagicMismatch + } + d.id = binary.LittleEndian.Uint32(b[4:8]) + if d.id == 0 { + return nil, errors.New("dictionaries cannot have ID 0") + } + + // Read literal table + var err error + d.litEnc, b, err = huff0.ReadTable(b[8:], nil) + if err != nil { + return nil, fmt.Errorf("loading literal table: %w", err) + } + d.litEnc.Reuse = huff0.ReusePolicyMust + + br := byteReader{ + b: b, + off: 0, + } + readDec := func(i tableIndex, dec *fseDecoder) error { + if err := dec.readNCount(&br, uint16(maxTableSymbol[i])); err != nil { + return err + } + if br.overread() { + return io.ErrUnexpectedEOF + } + err = dec.transform(symbolTableX[i]) + if err != nil { + println("Transform table error:", err) + return err + } + if debugDecoder || debugEncoder { + println("Read table ok", "symbolLen:", dec.symbolLen) + } + // Set decoders as predefined so they aren't reused. + dec.preDefined = true + return nil + } + + if err := readDec(tableOffsets, d.ofDec.fse); err != nil { + return nil, err + } + if err := readDec(tableMatchLengths, d.mlDec.fse); err != nil { + return nil, err + } + if err := readDec(tableLiteralLengths, d.llDec.fse); err != nil { + return nil, err + } + if br.remain() < 12 { + return nil, io.ErrUnexpectedEOF + } + + d.offsets[0] = int(br.Uint32()) + br.advance(4) + d.offsets[1] = int(br.Uint32()) + br.advance(4) + d.offsets[2] = int(br.Uint32()) + br.advance(4) + if d.offsets[0] <= 0 || d.offsets[1] <= 0 || d.offsets[2] <= 0 { + return nil, errors.New("invalid offset in dictionary") + } + d.content = make([]byte, br.remain()) + copy(d.content, br.unread()) + if d.offsets[0] > len(d.content) || d.offsets[1] > len(d.content) || d.offsets[2] > len(d.content) { + return nil, fmt.Errorf("initial offset bigger than dictionary content size %d, offsets: %v", len(d.content), d.offsets) + } + + return &d, nil +} + +// InspectDictionary loads a zstd dictionary and provides functions to inspect the content. +func InspectDictionary(b []byte) (interface { + ID() uint32 + ContentSize() int + Content() []byte + Offsets() [3]int + LitEncoder() *huff0.Scratch +}, error) { + initPredefined() + d, err := loadDict(b) + return d, err +} + +type BuildDictOptions struct { + // Dictionary ID. + ID uint32 + + // Content to use to create dictionary tables. + Contents [][]byte + + // History to use for all blocks. + History []byte + + // Offsets to use. + Offsets [3]int + + // CompatV155 will make the dictionary compatible with Zstd v1.5.5 and earlier. + // See https://github.com/facebook/zstd/issues/3724 + CompatV155 bool + + // Use the specified encoder level. + // The dictionary will be built using the specified encoder level, + // which will reflect speed and make the dictionary tailored for that level. + // If not set SpeedBestCompression will be used. + Level EncoderLevel + + // DebugOut will write stats and other details here if set. + DebugOut io.Writer +} + +func BuildDict(o BuildDictOptions) ([]byte, error) { + initPredefined() + hist := o.History + contents := o.Contents + debug := o.DebugOut != nil + println := func(args ...any) { + if o.DebugOut != nil { + fmt.Fprintln(o.DebugOut, args...) + } + } + printf := func(s string, args ...any) { + if o.DebugOut != nil { + fmt.Fprintf(o.DebugOut, s, args...) + } + } + print := func(args ...any) { + if o.DebugOut != nil { + fmt.Fprint(o.DebugOut, args...) + } + } + + if int64(len(hist)) > dictMaxLength { + return nil, fmt.Errorf("dictionary of size %d > %d", len(hist), int64(dictMaxLength)) + } + if len(hist) < 8 { + return nil, fmt.Errorf("dictionary of size %d < %d", len(hist), 8) + } + if len(contents) == 0 { + return nil, errors.New("no content provided") + } + d := dict{ + id: o.ID, + litEnc: nil, + llDec: sequenceDec{}, + ofDec: sequenceDec{}, + mlDec: sequenceDec{}, + offsets: o.Offsets, + content: hist, + } + block := blockEnc{lowMem: false} + block.init() + enc := encoder(&bestFastEncoder{fastBase: fastBase{maxMatchOff: int32(maxMatchLen), bufferReset: math.MaxInt32 - int32(maxMatchLen*2), lowMem: false}}) + if o.Level != 0 { + eOpts := encoderOptions{ + level: o.Level, + blockSize: maxMatchLen, + windowSize: maxMatchLen, + dict: &d, + lowMem: false, + } + enc = eOpts.encoder() + } else { + o.Level = SpeedBestCompression + } + var ( + remain [256]int + ll [256]int + ml [256]int + of [256]int + ) + addValues := func(dst *[256]int, src []byte) { + for _, v := range src { + dst[v]++ + } + } + addHist := func(dst *[256]int, src *[256]uint32) { + for i, v := range src { + dst[i] += int(v) + } + } + seqs := 0 + nUsed := 0 + litTotal := 0 + newOffsets := make(map[uint32]int, 1000) + for _, b := range contents { + block.reset(nil) + if len(b) < 8 { + continue + } + nUsed++ + enc.Reset(&d, true) + enc.Encode(&block, b) + addValues(&remain, block.literals) + litTotal += len(block.literals) + if len(block.sequences) == 0 { + continue + } + seqs += len(block.sequences) + block.genCodes() + addHist(&ll, block.coders.llEnc.Histogram()) + addHist(&ml, block.coders.mlEnc.Histogram()) + addHist(&of, block.coders.ofEnc.Histogram()) + for i, seq := range block.sequences { + if i > 3 { + break + } + offset := seq.offset + if offset == 0 { + continue + } + if int(offset) >= len(o.History) { + continue + } + if offset > 3 { + newOffsets[offset-3]++ + } else { + newOffsets[uint32(o.Offsets[offset-1])]++ + } + } + } + // Find most used offsets. + var sortedOffsets []uint32 + for k := range newOffsets { + sortedOffsets = append(sortedOffsets, k) + } + sort.Slice(sortedOffsets, func(i, j int) bool { + a, b := sortedOffsets[i], sortedOffsets[j] + if a == b { + // Prefer the longer offset + return sortedOffsets[i] > sortedOffsets[j] + } + return newOffsets[sortedOffsets[i]] > newOffsets[sortedOffsets[j]] + }) + if len(sortedOffsets) > 3 { + if debug { + print("Offsets:") + for i, v := range sortedOffsets { + if i > 20 { + break + } + printf("[%d: %d],", v, newOffsets[v]) + } + println("") + } + + sortedOffsets = sortedOffsets[:3] + } + for i, v := range sortedOffsets { + o.Offsets[i] = int(v) + } + if debug { + println("New repeat offsets", o.Offsets) + } + + if nUsed == 0 || seqs == 0 { + return nil, fmt.Errorf("%d blocks, %d sequences found", nUsed, seqs) + } + if debug { + println("Sequences:", seqs, "Blocks:", nUsed, "Literals:", litTotal) + } + if seqs/nUsed < 512 { + // Use 512 as minimum. + nUsed = seqs / 512 + if nUsed == 0 { + nUsed = 1 + } + } + copyHist := func(dst *fseEncoder, src *[256]int) ([]byte, error) { + hist := dst.Histogram() + var maxSym uint8 + var maxCount int + var fakeLength int + for i, v := range src { + if v > 0 { + v = v / nUsed + if v == 0 { + v = 1 + } + } + if v > maxCount { + maxCount = v + } + if v != 0 { + maxSym = uint8(i) + } + fakeLength += v + hist[i] = uint32(v) + } + + // Ensure we aren't trying to represent RLE. + if maxCount == fakeLength { + for i := range hist { + if uint8(i) == maxSym { + fakeLength++ + maxSym++ + hist[i+1] = 1 + if maxSym > 1 { + break + } + } + if hist[0] == 0 { + fakeLength++ + hist[i] = 1 + if maxSym > 1 { + break + } + } + } + } + + dst.HistogramFinished(maxSym, maxCount) + dst.reUsed = false + dst.useRLE = false + err := dst.normalizeCount(fakeLength) + if err != nil { + return nil, err + } + if debug { + println("RAW:", dst.count[:maxSym+1], "NORM:", dst.norm[:maxSym+1], "LEN:", fakeLength) + } + return dst.writeCount(nil) + } + if debug { + print("Literal lengths: ") + } + llTable, err := copyHist(block.coders.llEnc, &ll) + if err != nil { + return nil, err + } + if debug { + print("Match lengths: ") + } + mlTable, err := copyHist(block.coders.mlEnc, &ml) + if err != nil { + return nil, err + } + if debug { + print("Offsets: ") + } + ofTable, err := copyHist(block.coders.ofEnc, &of) + if err != nil { + return nil, err + } + + // Literal table + avgSize := min(litTotal, huff0.BlockSizeMax/2) + huffBuff := make([]byte, 0, avgSize) + // Target size + div := max(litTotal/avgSize, 1) + if debug { + println("Huffman weights:") + } + for i, n := range remain[:] { + if n > 0 { + n = n / div + // Allow all entries to be represented. + if n == 0 { + n = 1 + } + huffBuff = append(huffBuff, bytes.Repeat([]byte{byte(i)}, n)...) + if debug { + printf("[%d: %d], ", i, n) + } + } + } + if o.CompatV155 && remain[255]/div == 0 { + huffBuff = append(huffBuff, 255) + } + scratch := &huff0.Scratch{TableLog: 11} + for tries := range 255 { + scratch = &huff0.Scratch{TableLog: 11} + _, _, err = huff0.Compress1X(huffBuff, scratch) + if err == nil { + break + } + if debug { + printf("Try %d: Huffman error: %v\n", tries+1, err) + } + huffBuff = huffBuff[:0] + if tries == 250 { + if debug { + println("Huffman: Bailing out with predefined table") + } + + // Bail out.... Just generate something + huffBuff = append(huffBuff, bytes.Repeat([]byte{255}, 10000)...) + for i := range 128 { + huffBuff = append(huffBuff, byte(i)) + } + continue + } + if errors.Is(err, huff0.ErrIncompressible) { + // Try truncating least common. + for i, n := range remain[:] { + if n > 0 { + n = n / (div * (i + 1)) + if n > 0 { + huffBuff = append(huffBuff, bytes.Repeat([]byte{byte(i)}, n)...) + } + } + } + if o.CompatV155 && len(huffBuff) > 0 && huffBuff[len(huffBuff)-1] != 255 { + huffBuff = append(huffBuff, 255) + } + if len(huffBuff) == 0 { + huffBuff = append(huffBuff, 0, 255) + } + } + if errors.Is(err, huff0.ErrUseRLE) { + for i, n := range remain[:] { + n = n / (div * (i + 1)) + // Allow all entries to be represented. + if n == 0 { + n = 1 + } + huffBuff = append(huffBuff, bytes.Repeat([]byte{byte(i)}, n)...) + } + } + } + + var out bytes.Buffer + out.Write([]byte(dictMagic)) + out.Write(binary.LittleEndian.AppendUint32(nil, o.ID)) + out.Write(scratch.OutTable) + if debug { + println("huff table:", len(scratch.OutTable), "bytes") + println("of table:", len(ofTable), "bytes") + println("ml table:", len(mlTable), "bytes") + println("ll table:", len(llTable), "bytes") + } + out.Write(ofTable) + out.Write(mlTable) + out.Write(llTable) + out.Write(binary.LittleEndian.AppendUint32(nil, uint32(o.Offsets[0]))) + out.Write(binary.LittleEndian.AppendUint32(nil, uint32(o.Offsets[1]))) + out.Write(binary.LittleEndian.AppendUint32(nil, uint32(o.Offsets[2]))) + out.Write(hist) + if debug { + _, err := loadDict(out.Bytes()) + if err != nil { + panic(err) + } + i, err := InspectDictionary(out.Bytes()) + if err != nil { + panic(err) + } + println("ID:", i.ID()) + println("Content size:", i.ContentSize()) + println("Encoder:", i.LitEncoder() != nil) + println("Offsets:", i.Offsets()) + var totalSize int + for _, b := range contents { + totalSize += len(b) + } + + encWith := func(opts ...EOption) int { + enc, err := NewWriter(nil, opts...) + if err != nil { + panic(err) + } + defer enc.Close() + var dst []byte + var totalSize int + for _, b := range contents { + dst = enc.EncodeAll(b, dst[:0]) + totalSize += len(dst) + } + return totalSize + } + plain := encWith(WithEncoderLevel(o.Level)) + withDict := encWith(WithEncoderLevel(o.Level), WithEncoderDict(out.Bytes())) + println("Input size:", totalSize) + println("Plain Compressed:", plain) + println("Dict Compressed:", withDict) + println("Saved:", plain-withDict, (plain-withDict)/len(contents), "bytes per input (rounded down)") + } + return out.Bytes(), nil +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/enc_base.go b/backend/vendor/github.com/klauspost/compress/zstd/enc_base.go new file mode 100644 index 0000000..c1192ec --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/enc_base.go @@ -0,0 +1,171 @@ +package zstd + +import ( + "fmt" + "math/bits" + + "github.com/klauspost/compress/zstd/internal/xxhash" +) + +const ( + dictShardBits = 7 +) + +type fastBase struct { + // cur is the offset at the start of hist + cur int32 + // maximum offset. Should be at least 2x block size. + maxMatchOff int32 + bufferReset int32 + hist []byte + crc *xxhash.Digest + tmp [8]byte + blk *blockEnc + lastDictID uint32 + lowMem bool +} + +// CRC returns the underlying CRC writer. +func (e *fastBase) CRC() *xxhash.Digest { + return e.crc +} + +// AppendCRC will append the CRC to the destination slice and return it. +func (e *fastBase) AppendCRC(dst []byte) []byte { + crc := e.crc.Sum(e.tmp[:0]) + dst = append(dst, crc[7], crc[6], crc[5], crc[4]) + return dst +} + +// WindowSize returns the window size of the encoder, +// or a window size small enough to contain the input size, if > 0. +func (e *fastBase) WindowSize(size int64) int32 { + if size > 0 && size < int64(e.maxMatchOff) { + b := max( + // Keep minimum window. + int32(1)< e.bufferReset { + panic(fmt.Sprintf("ecur (%d) > buffer reset (%d)", e.cur, e.bufferReset)) + } + // check if we have space already + if len(e.hist)+len(src) > cap(e.hist) { + if cap(e.hist) == 0 { + e.ensureHist(len(src)) + } else { + if cap(e.hist) < int(e.maxMatchOff+maxCompressedBlockSize) { + panic(fmt.Errorf("unexpected buffer cap %d, want at least %d with window %d", cap(e.hist), e.maxMatchOff+maxCompressedBlockSize, e.maxMatchOff)) + } + // Move down + offset := int32(len(e.hist)) - e.maxMatchOff + copy(e.hist[0:e.maxMatchOff], e.hist[offset:]) + e.cur += offset + e.hist = e.hist[:e.maxMatchOff] + } + } + s := int32(len(e.hist)) + e.hist = append(e.hist, src...) + return s +} + +// ensureHist will ensure that history can keep at least this many bytes. +func (e *fastBase) ensureHist(n int) { + if cap(e.hist) >= n { + return + } + l := e.maxMatchOff + if (e.lowMem && e.maxMatchOff > maxCompressedBlockSize) || e.maxMatchOff <= maxCompressedBlockSize { + l += maxCompressedBlockSize + } else { + l += e.maxMatchOff + } + // Make it at least 1MB. + if l < 1<<20 && !e.lowMem { + l = 1 << 20 + } + // Make it at least the requested size. + if l < int32(n) { + l = int32(n) + } + e.hist = make([]byte, 0, l) +} + +// useBlock will replace the block with the provided one, +// but transfer recent offsets from the previous. +func (e *fastBase) UseBlock(enc *blockEnc) { + enc.reset(e.blk) + e.blk = enc +} + +func (e *fastBase) matchlen(s, t int32, src []byte) int32 { + if debugAsserts { + if s < 0 { + err := fmt.Sprintf("s (%d) < 0", s) + panic(err) + } + if t < 0 { + err := fmt.Sprintf("t (%d) < 0", t) + panic(err) + } + if s-t > e.maxMatchOff { + err := fmt.Sprintf("s (%d) - t (%d) > maxMatchOff (%d)", s, t, e.maxMatchOff) + panic(err) + } + if len(src)-int(s) > maxCompressedBlockSize { + panic(fmt.Sprintf("len(src)-s (%d) > maxCompressedBlockSize (%d)", len(src)-int(s), maxCompressedBlockSize)) + } + } + return int32(matchLen(src[s:], src[t:])) +} + +// Reset the encoding table. +func (e *fastBase) resetBase(d *dict, singleBlock bool) { + if e.blk == nil { + e.blk = &blockEnc{lowMem: e.lowMem} + e.blk.init() + } else { + e.blk.reset(nil) + } + e.blk.initNewEncode() + if e.crc == nil { + e.crc = xxhash.New() + } else { + e.crc.Reset() + } + e.blk.dictLitEnc = nil + if d != nil { + low := e.lowMem + if singleBlock { + e.lowMem = true + } + e.ensureHist(d.ContentSize() + maxCompressedBlockSize) + e.lowMem = low + } + + // We offset current position so everything will be out of reach. + // If above reset line, history will be purged. + if e.cur < e.bufferReset { + e.cur += e.maxMatchOff + int32(len(e.hist)) + } + e.hist = e.hist[:0] + if d != nil { + // Set offsets (currently not used) + for i, off := range d.offsets { + e.blk.recentOffsets[i] = uint32(off) + e.blk.prevRecentOffsets[i] = e.blk.recentOffsets[i] + } + // Transfer litenc. + e.blk.dictLitEnc = d.litEnc + e.hist = append(e.hist, d.content...) + } +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/enc_best.go b/backend/vendor/github.com/klauspost/compress/zstd/enc_best.go new file mode 100644 index 0000000..c1581cf --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/enc_best.go @@ -0,0 +1,549 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "bytes" + "fmt" + + "github.com/klauspost/compress" +) + +const ( + bestLongTableBits = 22 // Bits used in the long match table + bestLongTableSize = 1 << bestLongTableBits // Size of the table + bestLongLen = 8 // Bytes used for table hash + + // Note: Increasing the short table bits or making the hash shorter + // can actually lead to compression degradation since it will 'steal' more from the + // long match table and match offsets are quite big. + // This greatly depends on the type of input. + bestShortTableBits = 18 // Bits used in the short match table + bestShortTableSize = 1 << bestShortTableBits // Size of the table + bestShortLen = 4 // Bytes used for table hash + +) + +type match struct { + offset int32 + s int32 + length int32 + rep int32 + est int32 +} + +const highScore = maxMatchLen * 8 + +// estBits will estimate output bits from predefined tables. +func (m *match) estBits(bitsPerByte int32) { + mlc := mlCode(uint32(m.length - zstdMinMatch)) + var ofc uint8 + if m.rep < 0 { + ofc = ofCode(uint32(m.s-m.offset) + 3) + } else { + ofc = ofCode(uint32(m.rep) & 3) + } + // Cost, excluding + ofTT, mlTT := fsePredefEnc[tableOffsets].ct.symbolTT[ofc], fsePredefEnc[tableMatchLengths].ct.symbolTT[mlc] + + // Add cost of match encoding... + m.est = int32(ofTT.outBits + mlTT.outBits) + m.est += int32(ofTT.deltaNbBits>>16 + mlTT.deltaNbBits>>16) + // Subtract savings compared to literal encoding... + m.est -= (m.length * bitsPerByte) >> 10 + if m.est > 0 { + // Unlikely gain.. + m.length = 0 + m.est = highScore + } +} + +// bestFastEncoder uses 2 tables, one for short matches (5 bytes) and one for long matches. +// The long match table contains the previous entry with the same hash, +// effectively making it a "chain" of length 2. +// When we find a long match we choose between the two values and select the longest. +// When we find a short match, after checking the long, we check if we can find a long at n+1 +// and that it is longer (lazy matching). +type bestFastEncoder struct { + fastBase + table [bestShortTableSize]prevEntry + longTable [bestLongTableSize]prevEntry + dictTable []prevEntry + dictLongTable []prevEntry +} + +// Encode improves compression... +func (e *bestFastEncoder) Encode(blk *blockEnc, src []byte) { + const ( + // Input margin is the number of bytes we read (8) + // and the maximum we will read ahead (2) + inputMargin = 8 + 4 + minNonLiteralBlockSize = 16 + ) + + // Protect against e.cur wraparound. + for e.cur >= e.bufferReset-int32(len(e.hist)) { + if len(e.hist) == 0 { + e.table = [bestShortTableSize]prevEntry{} + e.longTable = [bestLongTableSize]prevEntry{} + e.cur = e.maxMatchOff + break + } + // Shift down everything in the table that isn't already too far away. + minOff := e.cur + int32(len(e.hist)) - e.maxMatchOff + for i := range e.table[:] { + v := e.table[i].offset + v2 := e.table[i].prev + if v < minOff { + v = 0 + v2 = 0 + } else { + v = v - e.cur + e.maxMatchOff + if v2 < minOff { + v2 = 0 + } else { + v2 = v2 - e.cur + e.maxMatchOff + } + } + e.table[i] = prevEntry{ + offset: v, + prev: v2, + } + } + for i := range e.longTable[:] { + v := e.longTable[i].offset + v2 := e.longTable[i].prev + if v < minOff { + v = 0 + v2 = 0 + } else { + v = v - e.cur + e.maxMatchOff + if v2 < minOff { + v2 = 0 + } else { + v2 = v2 - e.cur + e.maxMatchOff + } + } + e.longTable[i] = prevEntry{ + offset: v, + prev: v2, + } + } + e.cur = e.maxMatchOff + break + } + + // Add block to history + s := e.addBlock(src) + blk.size = len(src) + + // Check RLE first + if len(src) > zstdMinMatch { + ml := matchLen(src[1:], src) + if ml == len(src)-1 { + blk.literals = append(blk.literals, src[0]) + blk.sequences = append(blk.sequences, seq{litLen: 1, matchLen: uint32(len(src)-1) - zstdMinMatch, offset: 1 + 3}) + return + } + } + + if len(src) < minNonLiteralBlockSize { + blk.extraLits = len(src) + blk.literals = blk.literals[:len(src)] + copy(blk.literals, src) + return + } + + // Use this to estimate literal cost. + // Scaled by 10 bits. + bitsPerByte := max( + // Huffman can never go < 1 bit/byte + int32((compress.ShannonEntropyBits(src)*1024)/len(src)), 1024) + + // Override src + src = e.hist + sLimit := int32(len(src)) - inputMargin + const kSearchStrength = 10 + + // nextEmit is where in src the next emitLiteral should start from. + nextEmit := s + + // Relative offsets + offset1 := int32(blk.recentOffsets[0]) + offset2 := int32(blk.recentOffsets[1]) + offset3 := int32(blk.recentOffsets[2]) + + addLiterals := func(s *seq, until int32) { + if until == nextEmit { + return + } + blk.literals = append(blk.literals, src[nextEmit:until]...) + s.litLen = uint32(until - nextEmit) + } + + if debugEncoder { + println("recent offsets:", blk.recentOffsets) + } + +encodeLoop: + for { + // We allow the encoder to optionally turn off repeat offsets across blocks + canRepeat := len(blk.sequences) > 2 + + if debugAsserts && canRepeat && offset1 == 0 { + panic("offset0 was 0") + } + + const goodEnough = 250 + + cv := load6432(src, s) + + nextHashL := hashLen(cv, bestLongTableBits, bestLongLen) + nextHashS := hashLen(cv, bestShortTableBits, bestShortLen) + candidateL := e.longTable[nextHashL] + candidateS := e.table[nextHashS] + + // Set m to a match at offset if it looks like that will improve compression. + improve := func(m *match, offset int32, s int32, first uint32, rep int32) { + delta := s - offset + if delta >= e.maxMatchOff || delta <= 0 || load3232(src, offset) != first { + return + } + // Try to quick reject if we already have a long match. + if m.length > 16 { + left := len(src) - int(m.s+m.length) + // If we are too close to the end, keep as is. + if left <= 0 { + return + } + checkLen := m.length - (s - m.s) - 8 + if left > 2 && checkLen > 4 { + // Check 4 bytes, 4 bytes from the end of the current match. + a := load3232(src, offset+checkLen) + b := load3232(src, s+checkLen) + if a != b { + return + } + } + } + l := 4 + e.matchlen(s+4, offset+4, src) + if m.rep <= 0 { + // Extend candidate match backwards as far as possible. + // Do not extend repeats as we can assume they are optimal + // and offsets change if s == nextEmit. + tMin := max(s-e.maxMatchOff, 0) + for offset > tMin && s > nextEmit && src[offset-1] == src[s-1] && l < maxMatchLength { + s-- + offset-- + l++ + } + } + if debugAsserts { + if offset >= s { + panic(fmt.Sprintf("offset: %d - s:%d - rep: %d - cur :%d - max: %d", offset, s, rep, e.cur, e.maxMatchOff)) + } + if !bytes.Equal(src[s:s+l], src[offset:offset+l]) { + panic(fmt.Sprintf("second match mismatch: %v != %v, first: %08x", src[s:s+4], src[offset:offset+4], first)) + } + } + cand := match{offset: offset, s: s, length: l, rep: rep} + cand.estBits(bitsPerByte) + if m.est >= highScore || cand.est-m.est+(cand.s-m.s)*bitsPerByte>>10 < 0 { + *m = cand + } + } + + best := match{s: s, est: highScore} + improve(&best, candidateL.offset-e.cur, s, uint32(cv), -1) + improve(&best, candidateL.prev-e.cur, s, uint32(cv), -1) + improve(&best, candidateS.offset-e.cur, s, uint32(cv), -1) + improve(&best, candidateS.prev-e.cur, s, uint32(cv), -1) + + if canRepeat && best.length < goodEnough { + if s == nextEmit { + // Check repeats straight after a match. + improve(&best, s-offset2, s, uint32(cv), 1|4) + improve(&best, s-offset3, s, uint32(cv), 2|4) + if offset1 > 1 { + improve(&best, s-(offset1-1), s, uint32(cv), 3|4) + } + } + + // If either no match or a non-repeat match, check at + 1 + if best.rep <= 0 { + cv32 := uint32(cv >> 8) + spp := s + 1 + improve(&best, spp-offset1, spp, cv32, 1) + improve(&best, spp-offset2, spp, cv32, 2) + improve(&best, spp-offset3, spp, cv32, 3) + if best.rep < 0 { + cv32 = uint32(cv >> 24) + spp += 2 + improve(&best, spp-offset1, spp, cv32, 1) + improve(&best, spp-offset2, spp, cv32, 2) + improve(&best, spp-offset3, spp, cv32, 3) + } + } + } + // Load next and check... + e.longTable[nextHashL] = prevEntry{offset: s + e.cur, prev: candidateL.offset} + e.table[nextHashS] = prevEntry{offset: s + e.cur, prev: candidateS.offset} + index0 := s + 1 + + // Look far ahead, unless we have a really long match already... + if best.length < goodEnough { + // No match found, move forward on input, no need to check forward... + if best.length < 4 { + s += 1 + (s-nextEmit)>>(kSearchStrength-1) + if s >= sLimit { + break encodeLoop + } + continue + } + + candidateS = e.table[hashLen(cv>>8, bestShortTableBits, bestShortLen)] + cv = load6432(src, s+1) + cv2 := load6432(src, s+2) + candidateL = e.longTable[hashLen(cv, bestLongTableBits, bestLongLen)] + candidateL2 := e.longTable[hashLen(cv2, bestLongTableBits, bestLongLen)] + + // Short at s+1 + improve(&best, candidateS.offset-e.cur, s+1, uint32(cv), -1) + // Long at s+1, s+2 + improve(&best, candidateL.offset-e.cur, s+1, uint32(cv), -1) + improve(&best, candidateL.prev-e.cur, s+1, uint32(cv), -1) + improve(&best, candidateL2.offset-e.cur, s+2, uint32(cv2), -1) + improve(&best, candidateL2.prev-e.cur, s+2, uint32(cv2), -1) + if false { + // Short at s+3. + // Too often worse... + improve(&best, e.table[hashLen(cv2>>8, bestShortTableBits, bestShortLen)].offset-e.cur, s+3, uint32(cv2>>8), -1) + } + + // Start check at a fixed offset to allow for a few mismatches. + // For this compression level 2 yields the best results. + // We cannot do this if we have already indexed this position. + const skipBeginning = 2 + if best.s > s-skipBeginning { + // See if we can find a better match by checking where the current best ends. + // Use that offset to see if we can find a better full match. + if sAt := best.s + best.length; sAt < sLimit { + nextHashL := hashLen(load6432(src, sAt), bestLongTableBits, bestLongLen) + candidateEnd := e.longTable[nextHashL] + + if off := candidateEnd.offset - e.cur - best.length + skipBeginning; off >= 0 { + improve(&best, off, best.s+skipBeginning, load3232(src, best.s+skipBeginning), -1) + if off := candidateEnd.prev - e.cur - best.length + skipBeginning; off >= 0 { + improve(&best, off, best.s+skipBeginning, load3232(src, best.s+skipBeginning), -1) + } + } + } + } + } + + if debugAsserts { + if best.offset >= best.s { + panic(fmt.Sprintf("best.offset > s: %d >= %d", best.offset, best.s)) + } + if best.s < nextEmit { + panic(fmt.Sprintf("s %d < nextEmit %d", best.s, nextEmit)) + } + if best.offset < s-e.maxMatchOff { + panic(fmt.Sprintf("best.offset < s-e.maxMatchOff: %d < %d", best.offset, s-e.maxMatchOff)) + } + if !bytes.Equal(src[best.s:best.s+best.length], src[best.offset:best.offset+best.length]) { + panic(fmt.Sprintf("match mismatch: %v != %v", src[best.s:best.s+best.length], src[best.offset:best.offset+best.length])) + } + } + + // We have a match, we can store the forward value + s = best.s + if best.rep > 0 { + var seq seq + seq.matchLen = uint32(best.length - zstdMinMatch) + addLiterals(&seq, best.s) + + // Repeat. If bit 4 is set, this is a non-lit repeat. + seq.offset = uint32(best.rep & 3) + if debugSequences { + println("repeat sequence", seq, "next s:", best.s, "off:", best.s-best.offset) + } + blk.sequences = append(blk.sequences, seq) + + // Index old s + 1 -> s - 1 + s = best.s + best.length + nextEmit = s + + // Index skipped... + end := min(s, sLimit+4) + off := index0 + e.cur + for index0 < end { + cv0 := load6432(src, index0) + h0 := hashLen(cv0, bestLongTableBits, bestLongLen) + h1 := hashLen(cv0, bestShortTableBits, bestShortLen) + e.longTable[h0] = prevEntry{offset: off, prev: e.longTable[h0].offset} + e.table[h1] = prevEntry{offset: off, prev: e.table[h1].offset} + off++ + index0++ + } + + switch best.rep { + case 2, 4 | 1: + offset1, offset2 = offset2, offset1 + case 3, 4 | 2: + offset1, offset2, offset3 = offset3, offset1, offset2 + case 4 | 3: + offset1, offset2, offset3 = offset1-1, offset1, offset2 + } + if s >= sLimit { + if debugEncoder { + println("repeat ended", s, best.length) + } + break encodeLoop + } + continue + } + + // A 4-byte match has been found. Update recent offsets. + // We'll later see if more than 4 bytes. + t := best.offset + offset1, offset2, offset3 = s-t, offset1, offset2 + + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + + if debugAsserts && int(offset1) > len(src) { + panic("invalid offset") + } + + // Write our sequence + var seq seq + l := best.length + seq.litLen = uint32(s - nextEmit) + seq.matchLen = uint32(l - zstdMinMatch) + if seq.litLen > 0 { + blk.literals = append(blk.literals, src[nextEmit:s]...) + } + seq.offset = uint32(s-t) + 3 + s += l + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + nextEmit = s + + // Index old s + 1 -> s - 1 or sLimit + end := min(s, sLimit-4) + + off := index0 + e.cur + for index0 < end { + cv0 := load6432(src, index0) + h0 := hashLen(cv0, bestLongTableBits, bestLongLen) + h1 := hashLen(cv0, bestShortTableBits, bestShortLen) + e.longTable[h0] = prevEntry{offset: off, prev: e.longTable[h0].offset} + e.table[h1] = prevEntry{offset: off, prev: e.table[h1].offset} + index0++ + off++ + } + if s >= sLimit { + break encodeLoop + } + } + + if int(nextEmit) < len(src) { + blk.literals = append(blk.literals, src[nextEmit:]...) + blk.extraLits = len(src) - int(nextEmit) + } + blk.recentOffsets[0] = uint32(offset1) + blk.recentOffsets[1] = uint32(offset2) + blk.recentOffsets[2] = uint32(offset3) + if debugEncoder { + println("returning, recent offsets:", blk.recentOffsets, "extra literals:", blk.extraLits) + } +} + +// EncodeNoHist will encode a block with no history and no following blocks. +// Most notable difference is that src will not be copied for history and +// we do not need to check for max match length. +func (e *bestFastEncoder) EncodeNoHist(blk *blockEnc, src []byte) { + e.ensureHist(len(src)) + e.Encode(blk, src) +} + +// Reset will reset and set a dictionary if not nil +func (e *bestFastEncoder) Reset(d *dict, singleBlock bool) { + e.resetBase(d, singleBlock) + if d == nil { + return + } + // Init or copy dict table + if len(e.dictTable) != len(e.table) || d.id != e.lastDictID { + if len(e.dictTable) != len(e.table) { + e.dictTable = make([]prevEntry, len(e.table)) + } + end := int32(len(d.content)) - 8 + e.maxMatchOff + for i := e.maxMatchOff; i < end; i += 4 { + const hashLog = bestShortTableBits + + cv := load6432(d.content, i-e.maxMatchOff) + nextHash := hashLen(cv, hashLog, bestShortLen) // 0 -> 4 + nextHash1 := hashLen(cv>>8, hashLog, bestShortLen) // 1 -> 5 + nextHash2 := hashLen(cv>>16, hashLog, bestShortLen) // 2 -> 6 + nextHash3 := hashLen(cv>>24, hashLog, bestShortLen) // 3 -> 7 + e.dictTable[nextHash] = prevEntry{ + prev: e.dictTable[nextHash].offset, + offset: i, + } + e.dictTable[nextHash1] = prevEntry{ + prev: e.dictTable[nextHash1].offset, + offset: i + 1, + } + e.dictTable[nextHash2] = prevEntry{ + prev: e.dictTable[nextHash2].offset, + offset: i + 2, + } + e.dictTable[nextHash3] = prevEntry{ + prev: e.dictTable[nextHash3].offset, + offset: i + 3, + } + } + e.lastDictID = d.id + } + + // Init or copy dict table + if len(e.dictLongTable) != len(e.longTable) || d.id != e.lastDictID { + if len(e.dictLongTable) != len(e.longTable) { + e.dictLongTable = make([]prevEntry, len(e.longTable)) + } + if len(d.content) >= 8 { + cv := load6432(d.content, 0) + h := hashLen(cv, bestLongTableBits, bestLongLen) + e.dictLongTable[h] = prevEntry{ + offset: e.maxMatchOff, + prev: e.dictLongTable[h].offset, + } + + end := int32(len(d.content)) - 8 + e.maxMatchOff + off := 8 // First to read + for i := e.maxMatchOff + 1; i < end; i++ { + cv = cv>>8 | (uint64(d.content[off]) << 56) + h := hashLen(cv, bestLongTableBits, bestLongLen) + e.dictLongTable[h] = prevEntry{ + offset: i, + prev: e.dictLongTable[h].offset, + } + off++ + } + } + e.lastDictID = d.id + } + // Reset table to initial state + copy(e.longTable[:], e.dictLongTable) + + e.cur = e.maxMatchOff + // Reset table to initial state + copy(e.table[:], e.dictTable) +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/enc_better.go b/backend/vendor/github.com/klauspost/compress/zstd/enc_better.go new file mode 100644 index 0000000..85dcd28 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/enc_better.go @@ -0,0 +1,1234 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import "fmt" + +const ( + betterLongTableBits = 19 // Bits used in the long match table + betterLongTableSize = 1 << betterLongTableBits // Size of the table + betterLongLen = 8 // Bytes used for table hash + + // Note: Increasing the short table bits or making the hash shorter + // can actually lead to compression degradation since it will 'steal' more from the + // long match table and match offsets are quite big. + // This greatly depends on the type of input. + betterShortTableBits = 13 // Bits used in the short match table + betterShortTableSize = 1 << betterShortTableBits // Size of the table + betterShortLen = 5 // Bytes used for table hash + + betterLongTableShardCnt = 1 << (betterLongTableBits - dictShardBits) // Number of shards in the table + betterLongTableShardSize = betterLongTableSize / betterLongTableShardCnt // Size of an individual shard + + betterShortTableShardCnt = 1 << (betterShortTableBits - dictShardBits) // Number of shards in the table + betterShortTableShardSize = betterShortTableSize / betterShortTableShardCnt // Size of an individual shard +) + +type prevEntry struct { + offset int32 + prev int32 +} + +// betterFastEncoder uses 2 tables, one for short matches (5 bytes) and one for long matches. +// The long match table contains the previous entry with the same hash, +// effectively making it a "chain" of length 2. +// When we find a long match we choose between the two values and select the longest. +// When we find a short match, after checking the long, we check if we can find a long at n+1 +// and that it is longer (lazy matching). +type betterFastEncoder struct { + fastBase + table [betterShortTableSize]tableEntry + longTable [betterLongTableSize]prevEntry +} + +type betterFastEncoderDict struct { + betterFastEncoder + dictTable []tableEntry + dictLongTable []prevEntry + shortTableShardDirty [betterShortTableShardCnt]bool + longTableShardDirty [betterLongTableShardCnt]bool + allDirty bool +} + +// Encode improves compression... +func (e *betterFastEncoder) Encode(blk *blockEnc, src []byte) { + const ( + // Input margin is the number of bytes we read (8) + // and the maximum we will read ahead (2) + inputMargin = 8 + 2 + minNonLiteralBlockSize = 16 + ) + + // Protect against e.cur wraparound. + for e.cur >= e.bufferReset-int32(len(e.hist)) { + if len(e.hist) == 0 { + e.table = [betterShortTableSize]tableEntry{} + e.longTable = [betterLongTableSize]prevEntry{} + e.cur = e.maxMatchOff + break + } + // Shift down everything in the table that isn't already too far away. + minOff := e.cur + int32(len(e.hist)) - e.maxMatchOff + for i := range e.table[:] { + v := e.table[i].offset + if v < minOff { + v = 0 + } else { + v = v - e.cur + e.maxMatchOff + } + e.table[i].offset = v + } + for i := range e.longTable[:] { + v := e.longTable[i].offset + v2 := e.longTable[i].prev + if v < minOff { + v = 0 + v2 = 0 + } else { + v = v - e.cur + e.maxMatchOff + if v2 < minOff { + v2 = 0 + } else { + v2 = v2 - e.cur + e.maxMatchOff + } + } + e.longTable[i] = prevEntry{ + offset: v, + prev: v2, + } + } + e.cur = e.maxMatchOff + break + } + // Add block to history + s := e.addBlock(src) + blk.size = len(src) + + // Check RLE first + if len(src) > zstdMinMatch { + ml := matchLen(src[1:], src) + if ml == len(src)-1 { + blk.literals = append(blk.literals, src[0]) + blk.sequences = append(blk.sequences, seq{litLen: 1, matchLen: uint32(len(src)-1) - zstdMinMatch, offset: 1 + 3}) + return + } + } + + if len(src) < minNonLiteralBlockSize { + blk.extraLits = len(src) + blk.literals = blk.literals[:len(src)] + copy(blk.literals, src) + return + } + + // Override src + src = e.hist + sLimit := int32(len(src)) - inputMargin + // stepSize is the number of bytes to skip on every main loop iteration. + // It should be >= 1. + const stepSize = 1 + + const kSearchStrength = 9 + + // nextEmit is where in src the next emitLiteral should start from. + nextEmit := s + cv := load6432(src, s) + + // Relative offsets + offset1 := int32(blk.recentOffsets[0]) + offset2 := int32(blk.recentOffsets[1]) + + addLiterals := func(s *seq, until int32) { + if until == nextEmit { + return + } + blk.literals = append(blk.literals, src[nextEmit:until]...) + s.litLen = uint32(until - nextEmit) + } + if debugEncoder { + println("recent offsets:", blk.recentOffsets) + } + +encodeLoop: + for { + var t int32 + // We allow the encoder to optionally turn off repeat offsets across blocks + canRepeat := len(blk.sequences) > 2 + var matched, index0 int32 + + for { + if debugAsserts && canRepeat && offset1 == 0 { + panic("offset0 was 0") + } + + nextHashL := hashLen(cv, betterLongTableBits, betterLongLen) + nextHashS := hashLen(cv, betterShortTableBits, betterShortLen) + candidateL := e.longTable[nextHashL] + candidateS := e.table[nextHashS] + + const repOff = 1 + repIndex := s - offset1 + repOff + off := s + e.cur + e.longTable[nextHashL] = prevEntry{offset: off, prev: candidateL.offset} + e.table[nextHashS] = tableEntry{offset: off, val: uint32(cv)} + index0 = s + 1 + + if canRepeat { + if repIndex >= 0 && load3232(src, repIndex) == uint32(cv>>(repOff*8)) { + // Consider history as well. + var seq seq + length := 4 + e.matchlen(s+4+repOff, repIndex+4, src) + + seq.matchLen = uint32(length - zstdMinMatch) + + // We might be able to match backwards. + // Extend as long as we can. + start := s + repOff + // We end the search early, so we don't risk 0 literals + // and have to do special offset treatment. + startLimit := nextEmit + 1 + + tMin := max(s-e.maxMatchOff, 0) + for repIndex > tMin && start > startLimit && src[repIndex-1] == src[start-1] && seq.matchLen < maxMatchLength-zstdMinMatch-1 { + repIndex-- + start-- + seq.matchLen++ + } + addLiterals(&seq, start) + + // rep 0 + seq.offset = 1 + if debugSequences { + println("repeat sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + + // Index match start+1 (long) -> s - 1 + index0 := s + repOff + s += length + repOff + + nextEmit = s + if s >= sLimit { + if debugEncoder { + println("repeat ended", s, length) + + } + break encodeLoop + } + // Index skipped... + for index0 < s-1 { + cv0 := load6432(src, index0) + cv1 := cv0 >> 8 + h0 := hashLen(cv0, betterLongTableBits, betterLongLen) + off := index0 + e.cur + e.longTable[h0] = prevEntry{offset: off, prev: e.longTable[h0].offset} + e.table[hashLen(cv1, betterShortTableBits, betterShortLen)] = tableEntry{offset: off + 1, val: uint32(cv1)} + index0 += 2 + } + cv = load6432(src, s) + continue + } + const repOff2 = 1 + + // We deviate from the reference encoder and also check offset 2. + // Still slower and not much better, so disabled. + // repIndex = s - offset2 + repOff2 + if false && repIndex >= 0 && load6432(src, repIndex) == load6432(src, s+repOff) { + // Consider history as well. + var seq seq + length := 8 + e.matchlen(s+8+repOff2, repIndex+8, src) + + seq.matchLen = uint32(length - zstdMinMatch) + + // We might be able to match backwards. + // Extend as long as we can. + start := s + repOff2 + // We end the search early, so we don't risk 0 literals + // and have to do special offset treatment. + startLimit := nextEmit + 1 + + tMin := max(s-e.maxMatchOff, 0) + for repIndex > tMin && start > startLimit && src[repIndex-1] == src[start-1] && seq.matchLen < maxMatchLength-zstdMinMatch-1 { + repIndex-- + start-- + seq.matchLen++ + } + addLiterals(&seq, start) + + // rep 2 + seq.offset = 2 + if debugSequences { + println("repeat sequence 2", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + + s += length + repOff2 + nextEmit = s + if s >= sLimit { + if debugEncoder { + println("repeat ended", s, length) + + } + break encodeLoop + } + + // Index skipped... + for index0 < s-1 { + cv0 := load6432(src, index0) + cv1 := cv0 >> 8 + h0 := hashLen(cv0, betterLongTableBits, betterLongLen) + off := index0 + e.cur + e.longTable[h0] = prevEntry{offset: off, prev: e.longTable[h0].offset} + e.table[hashLen(cv1, betterShortTableBits, betterShortLen)] = tableEntry{offset: off + 1, val: uint32(cv1)} + index0 += 2 + } + cv = load6432(src, s) + // Swap offsets + offset1, offset2 = offset2, offset1 + continue + } + } + // Find the offsets of our two matches. + coffsetL := candidateL.offset - e.cur + coffsetLP := candidateL.prev - e.cur + + // Check if we have a long match. + if s-coffsetL < e.maxMatchOff && cv == load6432(src, coffsetL) { + // Found a long match, at least 8 bytes. + matched = e.matchlen(s+8, coffsetL+8, src) + 8 + t = coffsetL + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugMatches { + println("long match") + } + + if s-coffsetLP < e.maxMatchOff && cv == load6432(src, coffsetLP) { + // Found a long match, at least 8 bytes. + prevMatch := e.matchlen(s+8, coffsetLP+8, src) + 8 + if prevMatch > matched { + matched = prevMatch + t = coffsetLP + } + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugMatches { + println("long match") + } + } + break + } + + // Check if we have a long match on prev. + if s-coffsetLP < e.maxMatchOff && cv == load6432(src, coffsetLP) { + // Found a long match, at least 8 bytes. + matched = e.matchlen(s+8, coffsetLP+8, src) + 8 + t = coffsetLP + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugMatches { + println("long match") + } + break + } + + coffsetS := candidateS.offset - e.cur + + // Check if we have a short match. + if s-coffsetS < e.maxMatchOff && uint32(cv) == candidateS.val { + // found a regular match + matched = e.matchlen(s+4, coffsetS+4, src) + 4 + + // See if we can find a long match at s+1 + const checkAt = 1 + cv := load6432(src, s+checkAt) + nextHashL = hashLen(cv, betterLongTableBits, betterLongLen) + candidateL = e.longTable[nextHashL] + coffsetL = candidateL.offset - e.cur + + // We can store it, since we have at least a 4 byte match. + e.longTable[nextHashL] = prevEntry{offset: s + checkAt + e.cur, prev: candidateL.offset} + if s-coffsetL < e.maxMatchOff && cv == load6432(src, coffsetL) { + // Found a long match, at least 8 bytes. + matchedNext := e.matchlen(s+8+checkAt, coffsetL+8, src) + 8 + if matchedNext > matched { + t = coffsetL + s += checkAt + matched = matchedNext + if debugMatches { + println("long match (after short)") + } + break + } + } + + // Check prev long... + coffsetL = candidateL.prev - e.cur + if s-coffsetL < e.maxMatchOff && cv == load6432(src, coffsetL) { + // Found a long match, at least 8 bytes. + matchedNext := e.matchlen(s+8+checkAt, coffsetL+8, src) + 8 + if matchedNext > matched { + t = coffsetL + s += checkAt + matched = matchedNext + if debugMatches { + println("prev long match (after short)") + } + break + } + } + t = coffsetS + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugAsserts && t < 0 { + panic("t<0") + } + if debugMatches { + println("short match") + } + break + } + + // No match found, move forward in input. + s += stepSize + ((s - nextEmit) >> (kSearchStrength - 1)) + if s >= sLimit { + break encodeLoop + } + cv = load6432(src, s) + } + + // Try to find a better match by searching for a long match at the end of the current best match + if s+matched < sLimit { + // Allow some bytes at the beginning to mismatch. + // Sweet spot is around 3 bytes, but depends on input. + // The skipped bytes are tested in Extend backwards, + // and still picked up as part of the match if they do. + const skipBeginning = 3 + + nextHashL := hashLen(load6432(src, s+matched), betterLongTableBits, betterLongLen) + s2 := s + skipBeginning + cv := load3232(src, s2) + candidateL := e.longTable[nextHashL] + coffsetL := candidateL.offset - e.cur - matched + skipBeginning + if coffsetL >= 0 && coffsetL < s2 && s2-coffsetL < e.maxMatchOff && cv == load3232(src, coffsetL) { + // Found a long match, at least 4 bytes. + matchedNext := e.matchlen(s2+4, coffsetL+4, src) + 4 + if matchedNext > matched { + t = coffsetL + s = s2 + matched = matchedNext + if debugMatches { + println("long match at end-of-match") + } + } + } + + // Check prev long... + if true { + coffsetL = candidateL.prev - e.cur - matched + skipBeginning + if coffsetL >= 0 && coffsetL < s2 && s2-coffsetL < e.maxMatchOff && cv == load3232(src, coffsetL) { + // Found a long match, at least 4 bytes. + matchedNext := e.matchlen(s2+4, coffsetL+4, src) + 4 + if matchedNext > matched { + t = coffsetL + s = s2 + matched = matchedNext + if debugMatches { + println("prev long match at end-of-match") + } + } + } + } + } + // A match has been found. Update recent offsets. + offset2 = offset1 + offset1 = s - t + + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + + if debugAsserts && canRepeat && int(offset1) > len(src) { + panic("invalid offset") + } + + // Extend the n-byte match as long as possible. + l := matched + + // Extend backwards + tMin := max(s-e.maxMatchOff, 0) + for t > tMin && s > nextEmit && src[t-1] == src[s-1] && l < maxMatchLength { + s-- + t-- + l++ + } + + // Write our sequence + var seq seq + seq.litLen = uint32(s - nextEmit) + seq.matchLen = uint32(l - zstdMinMatch) + if seq.litLen > 0 { + blk.literals = append(blk.literals, src[nextEmit:s]...) + } + seq.offset = uint32(s-t) + 3 + s += l + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + nextEmit = s + if s >= sLimit { + break encodeLoop + } + + // Index match start+1 (long) -> s - 1 + off := index0 + e.cur + for index0 < s-1 { + cv0 := load6432(src, index0) + cv1 := cv0 >> 8 + h0 := hashLen(cv0, betterLongTableBits, betterLongLen) + e.longTable[h0] = prevEntry{offset: off, prev: e.longTable[h0].offset} + e.table[hashLen(cv1, betterShortTableBits, betterShortLen)] = tableEntry{offset: off + 1, val: uint32(cv1)} + index0 += 2 + off += 2 + } + + cv = load6432(src, s) + if !canRepeat { + continue + } + + // Check offset 2 + for { + o2 := s - offset2 + if load3232(src, o2) != uint32(cv) { + // Do regular search + break + } + + // Store this, since we have it. + nextHashL := hashLen(cv, betterLongTableBits, betterLongLen) + nextHashS := hashLen(cv, betterShortTableBits, betterShortLen) + + // We have at least 4 byte match. + // No need to check backwards. We come straight from a match + l := 4 + e.matchlen(s+4, o2+4, src) + + e.longTable[nextHashL] = prevEntry{offset: s + e.cur, prev: e.longTable[nextHashL].offset} + e.table[nextHashS] = tableEntry{offset: s + e.cur, val: uint32(cv)} + seq.matchLen = uint32(l) - zstdMinMatch + seq.litLen = 0 + + // Since litlen is always 0, this is offset 1. + seq.offset = 1 + s += l + nextEmit = s + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + + // Swap offset 1 and 2. + offset1, offset2 = offset2, offset1 + if s >= sLimit { + // Finished + break encodeLoop + } + cv = load6432(src, s) + } + } + + if int(nextEmit) < len(src) { + blk.literals = append(blk.literals, src[nextEmit:]...) + blk.extraLits = len(src) - int(nextEmit) + } + blk.recentOffsets[0] = uint32(offset1) + blk.recentOffsets[1] = uint32(offset2) + if debugEncoder { + println("returning, recent offsets:", blk.recentOffsets, "extra literals:", blk.extraLits) + } +} + +// EncodeNoHist will encode a block with no history and no following blocks. +// Most notable difference is that src will not be copied for history and +// we do not need to check for max match length. +func (e *betterFastEncoder) EncodeNoHist(blk *blockEnc, src []byte) { + e.ensureHist(len(src)) + e.Encode(blk, src) +} + +// Encode improves compression... +func (e *betterFastEncoderDict) Encode(blk *blockEnc, src []byte) { + const ( + // Input margin is the number of bytes we read (8) + // and the maximum we will read ahead (2) + inputMargin = 8 + 2 + minNonLiteralBlockSize = 16 + ) + + // Protect against e.cur wraparound. + for e.cur >= e.bufferReset-int32(len(e.hist)) { + if len(e.hist) == 0 { + for i := range e.table[:] { + e.table[i] = tableEntry{} + } + for i := range e.longTable[:] { + e.longTable[i] = prevEntry{} + } + e.cur = e.maxMatchOff + e.allDirty = true + break + } + // Shift down everything in the table that isn't already too far away. + minOff := e.cur + int32(len(e.hist)) - e.maxMatchOff + for i := range e.table[:] { + v := e.table[i].offset + if v < minOff { + v = 0 + } else { + v = v - e.cur + e.maxMatchOff + } + e.table[i].offset = v + } + for i := range e.longTable[:] { + v := e.longTable[i].offset + v2 := e.longTable[i].prev + if v < minOff { + v = 0 + v2 = 0 + } else { + v = v - e.cur + e.maxMatchOff + if v2 < minOff { + v2 = 0 + } else { + v2 = v2 - e.cur + e.maxMatchOff + } + } + e.longTable[i] = prevEntry{ + offset: v, + prev: v2, + } + } + e.allDirty = true + e.cur = e.maxMatchOff + break + } + + s := e.addBlock(src) + blk.size = len(src) + if len(src) < minNonLiteralBlockSize { + blk.extraLits = len(src) + blk.literals = blk.literals[:len(src)] + copy(blk.literals, src) + return + } + + // Override src + src = e.hist + sLimit := int32(len(src)) - inputMargin + // stepSize is the number of bytes to skip on every main loop iteration. + // It should be >= 1. + const stepSize = 1 + + const kSearchStrength = 9 + + // nextEmit is where in src the next emitLiteral should start from. + nextEmit := s + cv := load6432(src, s) + + // Relative offsets + offset1 := int32(blk.recentOffsets[0]) + offset2 := int32(blk.recentOffsets[1]) + + addLiterals := func(s *seq, until int32) { + if until == nextEmit { + return + } + blk.literals = append(blk.literals, src[nextEmit:until]...) + s.litLen = uint32(until - nextEmit) + } + if debugEncoder { + println("recent offsets:", blk.recentOffsets) + } + +encodeLoop: + for { + var t int32 + // We allow the encoder to optionally turn off repeat offsets across blocks + canRepeat := len(blk.sequences) > 2 + var matched, index0 int32 + + for { + if debugAsserts && canRepeat && offset1 == 0 { + panic("offset0 was 0") + } + + nextHashL := hashLen(cv, betterLongTableBits, betterLongLen) + nextHashS := hashLen(cv, betterShortTableBits, betterShortLen) + candidateL := e.longTable[nextHashL] + candidateS := e.table[nextHashS] + + const repOff = 1 + repIndex := s - offset1 + repOff + off := s + e.cur + e.longTable[nextHashL] = prevEntry{offset: off, prev: candidateL.offset} + e.markLongShardDirty(nextHashL) + e.table[nextHashS] = tableEntry{offset: off, val: uint32(cv)} + e.markShortShardDirty(nextHashS) + index0 = s + 1 + + if canRepeat { + if repIndex >= 0 && load3232(src, repIndex) == uint32(cv>>(repOff*8)) { + // Consider history as well. + var seq seq + length := 4 + e.matchlen(s+4+repOff, repIndex+4, src) + + seq.matchLen = uint32(length - zstdMinMatch) + + // We might be able to match backwards. + // Extend as long as we can. + start := s + repOff + // We end the search early, so we don't risk 0 literals + // and have to do special offset treatment. + startLimit := nextEmit + 1 + + tMin := max(s-e.maxMatchOff, 0) + for repIndex > tMin && start > startLimit && src[repIndex-1] == src[start-1] && seq.matchLen < maxMatchLength-zstdMinMatch-1 { + repIndex-- + start-- + seq.matchLen++ + } + addLiterals(&seq, start) + + // rep 0 + seq.offset = 1 + if debugSequences { + println("repeat sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + + // Index match start+1 (long) -> s - 1 + s += length + repOff + + nextEmit = s + if s >= sLimit { + if debugEncoder { + println("repeat ended", s, length) + + } + break encodeLoop + } + // Index skipped... + for index0 < s-1 { + cv0 := load6432(src, index0) + cv1 := cv0 >> 8 + h0 := hashLen(cv0, betterLongTableBits, betterLongLen) + off := index0 + e.cur + e.longTable[h0] = prevEntry{offset: off, prev: e.longTable[h0].offset} + e.markLongShardDirty(h0) + h1 := hashLen(cv1, betterShortTableBits, betterShortLen) + e.table[h1] = tableEntry{offset: off + 1, val: uint32(cv1)} + e.markShortShardDirty(h1) + index0 += 2 + } + cv = load6432(src, s) + continue + } + const repOff2 = 1 + + // We deviate from the reference encoder and also check offset 2. + // Still slower and not much better, so disabled. + // repIndex = s - offset2 + repOff2 + if false && repIndex >= 0 && load6432(src, repIndex) == load6432(src, s+repOff) { + // Consider history as well. + var seq seq + length := 8 + e.matchlen(s+8+repOff2, repIndex+8, src) + + seq.matchLen = uint32(length - zstdMinMatch) + + // We might be able to match backwards. + // Extend as long as we can. + start := s + repOff2 + // We end the search early, so we don't risk 0 literals + // and have to do special offset treatment. + startLimit := nextEmit + 1 + + tMin := max(s-e.maxMatchOff, 0) + for repIndex > tMin && start > startLimit && src[repIndex-1] == src[start-1] && seq.matchLen < maxMatchLength-zstdMinMatch-1 { + repIndex-- + start-- + seq.matchLen++ + } + addLiterals(&seq, start) + + // rep 2 + seq.offset = 2 + if debugSequences { + println("repeat sequence 2", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + + s += length + repOff2 + nextEmit = s + if s >= sLimit { + if debugEncoder { + println("repeat ended", s, length) + + } + break encodeLoop + } + + // Index skipped... + for index0 < s-1 { + cv0 := load6432(src, index0) + cv1 := cv0 >> 8 + h0 := hashLen(cv0, betterLongTableBits, betterLongLen) + off := index0 + e.cur + e.longTable[h0] = prevEntry{offset: off, prev: e.longTable[h0].offset} + e.markLongShardDirty(h0) + h1 := hashLen(cv1, betterShortTableBits, betterShortLen) + e.table[h1] = tableEntry{offset: off + 1, val: uint32(cv1)} + e.markShortShardDirty(h1) + index0 += 2 + } + cv = load6432(src, s) + // Swap offsets + offset1, offset2 = offset2, offset1 + continue + } + } + // Find the offsets of our two matches. + coffsetL := candidateL.offset - e.cur + coffsetLP := candidateL.prev - e.cur + + // Check if we have a long match. + if s-coffsetL < e.maxMatchOff && cv == load6432(src, coffsetL) { + // Found a long match, at least 8 bytes. + matched = e.matchlen(s+8, coffsetL+8, src) + 8 + t = coffsetL + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugMatches { + println("long match") + } + + if s-coffsetLP < e.maxMatchOff && cv == load6432(src, coffsetLP) { + // Found a long match, at least 8 bytes. + prevMatch := e.matchlen(s+8, coffsetLP+8, src) + 8 + if prevMatch > matched { + matched = prevMatch + t = coffsetLP + } + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugMatches { + println("long match") + } + } + break + } + + // Check if we have a long match on prev. + if s-coffsetLP < e.maxMatchOff && cv == load6432(src, coffsetLP) { + // Found a long match, at least 8 bytes. + matched = e.matchlen(s+8, coffsetLP+8, src) + 8 + t = coffsetLP + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugMatches { + println("long match") + } + break + } + + coffsetS := candidateS.offset - e.cur + + // Check if we have a short match. + if s-coffsetS < e.maxMatchOff && uint32(cv) == candidateS.val { + // found a regular match + matched = e.matchlen(s+4, coffsetS+4, src) + 4 + + // See if we can find a long match at s+1 + const checkAt = 1 + cv := load6432(src, s+checkAt) + nextHashL = hashLen(cv, betterLongTableBits, betterLongLen) + candidateL = e.longTable[nextHashL] + coffsetL = candidateL.offset - e.cur + + // We can store it, since we have at least a 4 byte match. + e.longTable[nextHashL] = prevEntry{offset: s + checkAt + e.cur, prev: candidateL.offset} + e.markLongShardDirty(nextHashL) + if s-coffsetL < e.maxMatchOff && cv == load6432(src, coffsetL) { + // Found a long match, at least 8 bytes. + matchedNext := e.matchlen(s+8+checkAt, coffsetL+8, src) + 8 + if matchedNext > matched { + t = coffsetL + s += checkAt + matched = matchedNext + if debugMatches { + println("long match (after short)") + } + break + } + } + + // Check prev long... + coffsetL = candidateL.prev - e.cur + if s-coffsetL < e.maxMatchOff && cv == load6432(src, coffsetL) { + // Found a long match, at least 8 bytes. + matchedNext := e.matchlen(s+8+checkAt, coffsetL+8, src) + 8 + if matchedNext > matched { + t = coffsetL + s += checkAt + matched = matchedNext + if debugMatches { + println("prev long match (after short)") + } + break + } + } + t = coffsetS + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugAsserts && t < 0 { + panic("t<0") + } + if debugMatches { + println("short match") + } + break + } + + // No match found, move forward in input. + s += stepSize + ((s - nextEmit) >> (kSearchStrength - 1)) + if s >= sLimit { + break encodeLoop + } + cv = load6432(src, s) + } + // Try to find a better match by searching for a long match at the end of the current best match + if s+matched < sLimit { + nextHashL := hashLen(load6432(src, s+matched), betterLongTableBits, betterLongLen) + cv := load3232(src, s) + candidateL := e.longTable[nextHashL] + coffsetL := candidateL.offset - e.cur - matched + if coffsetL >= 0 && coffsetL < s && s-coffsetL < e.maxMatchOff && cv == load3232(src, coffsetL) { + // Found a long match, at least 4 bytes. + matchedNext := e.matchlen(s+4, coffsetL+4, src) + 4 + if matchedNext > matched { + t = coffsetL + matched = matchedNext + if debugMatches { + println("long match at end-of-match") + } + } + } + + // Check prev long... + if true { + coffsetL = candidateL.prev - e.cur - matched + if coffsetL >= 0 && coffsetL < s && s-coffsetL < e.maxMatchOff && cv == load3232(src, coffsetL) { + // Found a long match, at least 4 bytes. + matchedNext := e.matchlen(s+4, coffsetL+4, src) + 4 + if matchedNext > matched { + t = coffsetL + matched = matchedNext + if debugMatches { + println("prev long match at end-of-match") + } + } + } + } + } + // A match has been found. Update recent offsets. + offset2 = offset1 + offset1 = s - t + + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + + if debugAsserts && canRepeat && int(offset1) > len(src) { + panic("invalid offset") + } + + // Extend the n-byte match as long as possible. + l := matched + + // Extend backwards + tMin := max(s-e.maxMatchOff, 0) + for t > tMin && s > nextEmit && src[t-1] == src[s-1] && l < maxMatchLength { + s-- + t-- + l++ + } + + // Write our sequence + var seq seq + seq.litLen = uint32(s - nextEmit) + seq.matchLen = uint32(l - zstdMinMatch) + if seq.litLen > 0 { + blk.literals = append(blk.literals, src[nextEmit:s]...) + } + seq.offset = uint32(s-t) + 3 + s += l + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + nextEmit = s + if s >= sLimit { + break encodeLoop + } + + // Index match start+1 (long) -> s - 1 + off := index0 + e.cur + for index0 < s-1 { + cv0 := load6432(src, index0) + cv1 := cv0 >> 8 + h0 := hashLen(cv0, betterLongTableBits, betterLongLen) + e.longTable[h0] = prevEntry{offset: off, prev: e.longTable[h0].offset} + e.markLongShardDirty(h0) + h1 := hashLen(cv1, betterShortTableBits, betterShortLen) + e.table[h1] = tableEntry{offset: off + 1, val: uint32(cv1)} + e.markShortShardDirty(h1) + index0 += 2 + off += 2 + } + + cv = load6432(src, s) + if !canRepeat { + continue + } + + // Check offset 2 + for { + o2 := s - offset2 + if load3232(src, o2) != uint32(cv) { + // Do regular search + break + } + + // Store this, since we have it. + nextHashL := hashLen(cv, betterLongTableBits, betterLongLen) + nextHashS := hashLen(cv, betterShortTableBits, betterShortLen) + + // We have at least 4 byte match. + // No need to check backwards. We come straight from a match + l := 4 + e.matchlen(s+4, o2+4, src) + + e.longTable[nextHashL] = prevEntry{offset: s + e.cur, prev: e.longTable[nextHashL].offset} + e.markLongShardDirty(nextHashL) + e.table[nextHashS] = tableEntry{offset: s + e.cur, val: uint32(cv)} + e.markShortShardDirty(nextHashS) + seq.matchLen = uint32(l) - zstdMinMatch + seq.litLen = 0 + + // Since litlen is always 0, this is offset 1. + seq.offset = 1 + s += l + nextEmit = s + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + + // Swap offset 1 and 2. + offset1, offset2 = offset2, offset1 + if s >= sLimit { + // Finished + break encodeLoop + } + cv = load6432(src, s) + } + } + + if int(nextEmit) < len(src) { + blk.literals = append(blk.literals, src[nextEmit:]...) + blk.extraLits = len(src) - int(nextEmit) + } + blk.recentOffsets[0] = uint32(offset1) + blk.recentOffsets[1] = uint32(offset2) + if debugEncoder { + println("returning, recent offsets:", blk.recentOffsets, "extra literals:", blk.extraLits) + } +} + +// ResetDict will reset and set a dictionary if not nil +func (e *betterFastEncoder) Reset(d *dict, singleBlock bool) { + e.resetBase(d, singleBlock) + if d != nil { + panic("betterFastEncoder: Reset with dict") + } +} + +// ResetDict will reset and set a dictionary if not nil +func (e *betterFastEncoderDict) Reset(d *dict, singleBlock bool) { + e.resetBase(d, singleBlock) + if d == nil { + return + } + // Init or copy dict table + if len(e.dictTable) != len(e.table) || d.id != e.lastDictID { + if len(e.dictTable) != len(e.table) { + e.dictTable = make([]tableEntry, len(e.table)) + } + end := int32(len(d.content)) - 8 + e.maxMatchOff + for i := e.maxMatchOff; i < end; i += 4 { + const hashLog = betterShortTableBits + + cv := load6432(d.content, i-e.maxMatchOff) + nextHash := hashLen(cv, hashLog, betterShortLen) // 0 -> 4 + nextHash1 := hashLen(cv>>8, hashLog, betterShortLen) // 1 -> 5 + nextHash2 := hashLen(cv>>16, hashLog, betterShortLen) // 2 -> 6 + nextHash3 := hashLen(cv>>24, hashLog, betterShortLen) // 3 -> 7 + e.dictTable[nextHash] = tableEntry{ + val: uint32(cv), + offset: i, + } + e.dictTable[nextHash1] = tableEntry{ + val: uint32(cv >> 8), + offset: i + 1, + } + e.dictTable[nextHash2] = tableEntry{ + val: uint32(cv >> 16), + offset: i + 2, + } + e.dictTable[nextHash3] = tableEntry{ + val: uint32(cv >> 24), + offset: i + 3, + } + } + e.lastDictID = d.id + e.allDirty = true + } + + // Init or copy dict table + if len(e.dictLongTable) != len(e.longTable) || d.id != e.lastDictID { + if len(e.dictLongTable) != len(e.longTable) { + e.dictLongTable = make([]prevEntry, len(e.longTable)) + } + if len(d.content) >= 8 { + cv := load6432(d.content, 0) + h := hashLen(cv, betterLongTableBits, betterLongLen) + e.dictLongTable[h] = prevEntry{ + offset: e.maxMatchOff, + prev: e.dictLongTable[h].offset, + } + + end := int32(len(d.content)) - 8 + e.maxMatchOff + off := 8 // First to read + for i := e.maxMatchOff + 1; i < end; i++ { + cv = cv>>8 | (uint64(d.content[off]) << 56) + h := hashLen(cv, betterLongTableBits, betterLongLen) + e.dictLongTable[h] = prevEntry{ + offset: i, + prev: e.dictLongTable[h].offset, + } + off++ + } + } + e.lastDictID = d.id + e.allDirty = true + } + + // Reset table to initial state + { + dirtyShardCnt := 0 + if !e.allDirty { + for i := range e.shortTableShardDirty { + if e.shortTableShardDirty[i] { + dirtyShardCnt++ + } + } + } + const shardCnt = betterShortTableShardCnt + const shardSize = betterShortTableShardSize + if e.allDirty || dirtyShardCnt > shardCnt*4/6 { + copy(e.table[:], e.dictTable) + for i := range e.shortTableShardDirty { + e.shortTableShardDirty[i] = false + } + } else { + for i := range e.shortTableShardDirty { + if !e.shortTableShardDirty[i] { + continue + } + + copy(e.table[i*shardSize:(i+1)*shardSize], e.dictTable[i*shardSize:(i+1)*shardSize]) + e.shortTableShardDirty[i] = false + } + } + } + { + dirtyShardCnt := 0 + if !e.allDirty { + for i := range e.shortTableShardDirty { + if e.shortTableShardDirty[i] { + dirtyShardCnt++ + } + } + } + const shardCnt = betterLongTableShardCnt + const shardSize = betterLongTableShardSize + if e.allDirty || dirtyShardCnt > shardCnt*4/6 { + copy(e.longTable[:], e.dictLongTable) + for i := range e.longTableShardDirty { + e.longTableShardDirty[i] = false + } + } else { + for i := range e.longTableShardDirty { + if !e.longTableShardDirty[i] { + continue + } + + copy(e.longTable[i*shardSize:(i+1)*shardSize], e.dictLongTable[i*shardSize:(i+1)*shardSize]) + e.longTableShardDirty[i] = false + } + } + } + e.cur = e.maxMatchOff + e.allDirty = false +} + +func (e *betterFastEncoderDict) markLongShardDirty(entryNum uint32) { + e.longTableShardDirty[entryNum/betterLongTableShardSize] = true +} + +func (e *betterFastEncoderDict) markShortShardDirty(entryNum uint32) { + e.shortTableShardDirty[entryNum/betterShortTableShardSize] = true +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/enc_dfast.go b/backend/vendor/github.com/klauspost/compress/zstd/enc_dfast.go new file mode 100644 index 0000000..cf8cad0 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/enc_dfast.go @@ -0,0 +1,1105 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import "fmt" + +const ( + dFastLongTableBits = 17 // Bits used in the long match table + dFastLongTableSize = 1 << dFastLongTableBits // Size of the table + dFastLongTableMask = dFastLongTableSize - 1 // Mask for table indices. Redundant, but can eliminate bounds checks. + dFastLongLen = 8 // Bytes used for table hash + + dLongTableShardCnt = 1 << (dFastLongTableBits - dictShardBits) // Number of shards in the table + dLongTableShardSize = dFastLongTableSize / dLongTableShardCnt // Size of an individual shard + + dFastShortTableBits = tableBits // Bits used in the short match table + dFastShortTableSize = 1 << dFastShortTableBits // Size of the table + dFastShortTableMask = dFastShortTableSize - 1 // Mask for table indices. Redundant, but can eliminate bounds checks. + dFastShortLen = 5 // Bytes used for table hash + +) + +type doubleFastEncoder struct { + fastEncoder + longTable [dFastLongTableSize]tableEntry +} + +type doubleFastEncoderDict struct { + fastEncoderDict + longTable [dFastLongTableSize]tableEntry + dictLongTable []tableEntry + longTableShardDirty [dLongTableShardCnt]bool +} + +// Encode mimmics functionality in zstd_dfast.c +func (e *doubleFastEncoder) Encode(blk *blockEnc, src []byte) { + const ( + // Input margin is the number of bytes we read (8) + // and the maximum we will read ahead (2) + inputMargin = 8 + 2 + minNonLiteralBlockSize = 16 + ) + + // Protect against e.cur wraparound. + for e.cur >= e.bufferReset-int32(len(e.hist)) { + if len(e.hist) == 0 { + e.table = [dFastShortTableSize]tableEntry{} + e.longTable = [dFastLongTableSize]tableEntry{} + e.cur = e.maxMatchOff + break + } + // Shift down everything in the table that isn't already too far away. + minOff := e.cur + int32(len(e.hist)) - e.maxMatchOff + for i := range e.table[:] { + v := e.table[i].offset + if v < minOff { + v = 0 + } else { + v = v - e.cur + e.maxMatchOff + } + e.table[i].offset = v + } + for i := range e.longTable[:] { + v := e.longTable[i].offset + if v < minOff { + v = 0 + } else { + v = v - e.cur + e.maxMatchOff + } + e.longTable[i].offset = v + } + e.cur = e.maxMatchOff + break + } + + s := e.addBlock(src) + blk.size = len(src) + if len(src) < minNonLiteralBlockSize { + blk.extraLits = len(src) + blk.literals = blk.literals[:len(src)] + copy(blk.literals, src) + return + } + + // Override src + src = e.hist + sLimit := int32(len(src)) - inputMargin + // stepSize is the number of bytes to skip on every main loop iteration. + // It should be >= 1. + const stepSize = 1 + + const kSearchStrength = 8 + + // nextEmit is where in src the next emitLiteral should start from. + nextEmit := s + cv := load6432(src, s) + + // Relative offsets + offset1 := int32(blk.recentOffsets[0]) + offset2 := int32(blk.recentOffsets[1]) + + addLiterals := func(s *seq, until int32) { + if until == nextEmit { + return + } + blk.literals = append(blk.literals, src[nextEmit:until]...) + s.litLen = uint32(until - nextEmit) + } + if debugEncoder { + println("recent offsets:", blk.recentOffsets) + } + +encodeLoop: + for { + var t int32 + // We allow the encoder to optionally turn off repeat offsets across blocks + canRepeat := len(blk.sequences) > 2 + + for { + if debugAsserts && canRepeat && offset1 == 0 { + panic("offset0 was 0") + } + + nextHashL := hashLen(cv, dFastLongTableBits, dFastLongLen) + nextHashS := hashLen(cv, dFastShortTableBits, dFastShortLen) + candidateL := e.longTable[nextHashL] + candidateS := e.table[nextHashS] + + const repOff = 1 + repIndex := s - offset1 + repOff + entry := tableEntry{offset: s + e.cur, val: uint32(cv)} + e.longTable[nextHashL] = entry + e.table[nextHashS] = entry + + if canRepeat { + if repIndex >= 0 && load3232(src, repIndex) == uint32(cv>>(repOff*8)) { + // Consider history as well. + var seq seq + length := 4 + e.matchlen(s+4+repOff, repIndex+4, src) + + seq.matchLen = uint32(length - zstdMinMatch) + + // We might be able to match backwards. + // Extend as long as we can. + start := s + repOff + // We end the search early, so we don't risk 0 literals + // and have to do special offset treatment. + startLimit := nextEmit + 1 + + tMin := max(s-e.maxMatchOff, 0) + for repIndex > tMin && start > startLimit && src[repIndex-1] == src[start-1] && seq.matchLen < maxMatchLength-zstdMinMatch-1 { + repIndex-- + start-- + seq.matchLen++ + } + addLiterals(&seq, start) + + // rep 0 + seq.offset = 1 + if debugSequences { + println("repeat sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + s += length + repOff + nextEmit = s + if s >= sLimit { + if debugEncoder { + println("repeat ended", s, length) + + } + break encodeLoop + } + cv = load6432(src, s) + continue + } + } + // Find the offsets of our two matches. + coffsetL := s - (candidateL.offset - e.cur) + coffsetS := s - (candidateS.offset - e.cur) + + // Check if we have a long match. + if coffsetL < e.maxMatchOff && uint32(cv) == candidateL.val { + // Found a long match, likely at least 8 bytes. + // Reference encoder checks all 8 bytes, we only check 4, + // but the likelihood of both the first 4 bytes and the hash matching should be enough. + t = candidateL.offset - e.cur + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugMatches { + println("long match") + } + break + } + + // Check if we have a short match. + if coffsetS < e.maxMatchOff && uint32(cv) == candidateS.val { + // found a regular match + // See if we can find a long match at s+1 + const checkAt = 1 + cv := load6432(src, s+checkAt) + nextHashL = hashLen(cv, dFastLongTableBits, dFastLongLen) + candidateL = e.longTable[nextHashL] + coffsetL = s - (candidateL.offset - e.cur) + checkAt + + // We can store it, since we have at least a 4 byte match. + e.longTable[nextHashL] = tableEntry{offset: s + checkAt + e.cur, val: uint32(cv)} + if coffsetL < e.maxMatchOff && uint32(cv) == candidateL.val { + // Found a long match, likely at least 8 bytes. + // Reference encoder checks all 8 bytes, we only check 4, + // but the likelihood of both the first 4 bytes and the hash matching should be enough. + t = candidateL.offset - e.cur + s += checkAt + if debugMatches { + println("long match (after short)") + } + break + } + + t = candidateS.offset - e.cur + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugAsserts && t < 0 { + panic("t<0") + } + if debugMatches { + println("short match") + } + break + } + + // No match found, move forward in input. + s += stepSize + ((s - nextEmit) >> (kSearchStrength - 1)) + if s >= sLimit { + break encodeLoop + } + cv = load6432(src, s) + } + + // A 4-byte match has been found. Update recent offsets. + // We'll later see if more than 4 bytes. + offset2 = offset1 + offset1 = s - t + + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + + if debugAsserts && canRepeat && int(offset1) > len(src) { + panic("invalid offset") + } + + // Extend the 4-byte match as long as possible. + l := e.matchlen(s+4, t+4, src) + 4 + + // Extend backwards + tMin := max(s-e.maxMatchOff, 0) + for t > tMin && s > nextEmit && src[t-1] == src[s-1] && l < maxMatchLength { + s-- + t-- + l++ + } + + // Write our sequence + var seq seq + seq.litLen = uint32(s - nextEmit) + seq.matchLen = uint32(l - zstdMinMatch) + if seq.litLen > 0 { + blk.literals = append(blk.literals, src[nextEmit:s]...) + } + seq.offset = uint32(s-t) + 3 + s += l + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + nextEmit = s + if s >= sLimit { + break encodeLoop + } + + // Index match start+1 (long) and start+2 (short) + index0 := s - l + 1 + // Index match end-2 (long) and end-1 (short) + index1 := s - 2 + + cv0 := load6432(src, index0) + cv1 := load6432(src, index1) + te0 := tableEntry{offset: index0 + e.cur, val: uint32(cv0)} + te1 := tableEntry{offset: index1 + e.cur, val: uint32(cv1)} + e.longTable[hashLen(cv0, dFastLongTableBits, dFastLongLen)] = te0 + e.longTable[hashLen(cv1, dFastLongTableBits, dFastLongLen)] = te1 + cv0 >>= 8 + cv1 >>= 8 + te0.offset++ + te1.offset++ + te0.val = uint32(cv0) + te1.val = uint32(cv1) + e.table[hashLen(cv0, dFastShortTableBits, dFastShortLen)] = te0 + e.table[hashLen(cv1, dFastShortTableBits, dFastShortLen)] = te1 + + cv = load6432(src, s) + + if !canRepeat { + continue + } + + // Check offset 2 + for { + o2 := s - offset2 + if load3232(src, o2) != uint32(cv) { + // Do regular search + break + } + + // Store this, since we have it. + nextHashS := hashLen(cv, dFastShortTableBits, dFastShortLen) + nextHashL := hashLen(cv, dFastLongTableBits, dFastLongLen) + + // We have at least 4 byte match. + // No need to check backwards. We come straight from a match + l := 4 + e.matchlen(s+4, o2+4, src) + + entry := tableEntry{offset: s + e.cur, val: uint32(cv)} + e.longTable[nextHashL] = entry + e.table[nextHashS] = entry + seq.matchLen = uint32(l) - zstdMinMatch + seq.litLen = 0 + + // Since litlen is always 0, this is offset 1. + seq.offset = 1 + s += l + nextEmit = s + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + + // Swap offset 1 and 2. + offset1, offset2 = offset2, offset1 + if s >= sLimit { + // Finished + break encodeLoop + } + cv = load6432(src, s) + } + } + + if int(nextEmit) < len(src) { + blk.literals = append(blk.literals, src[nextEmit:]...) + blk.extraLits = len(src) - int(nextEmit) + } + blk.recentOffsets[0] = uint32(offset1) + blk.recentOffsets[1] = uint32(offset2) + if debugEncoder { + println("returning, recent offsets:", blk.recentOffsets, "extra literals:", blk.extraLits) + } +} + +// EncodeNoHist will encode a block with no history and no following blocks. +// Most notable difference is that src will not be copied for history and +// we do not need to check for max match length. +func (e *doubleFastEncoder) EncodeNoHist(blk *blockEnc, src []byte) { + const ( + // Input margin is the number of bytes we read (8) + // and the maximum we will read ahead (2) + inputMargin = 8 + 2 + minNonLiteralBlockSize = 16 + ) + + // Protect against e.cur wraparound. + if e.cur >= e.bufferReset { + for i := range e.table[:] { + e.table[i] = tableEntry{} + } + for i := range e.longTable[:] { + e.longTable[i] = tableEntry{} + } + e.cur = e.maxMatchOff + } + + s := int32(0) + blk.size = len(src) + if len(src) < minNonLiteralBlockSize { + blk.extraLits = len(src) + blk.literals = blk.literals[:len(src)] + copy(blk.literals, src) + return + } + + // Override src + sLimit := int32(len(src)) - inputMargin + // stepSize is the number of bytes to skip on every main loop iteration. + // It should be >= 1. + const stepSize = 1 + + const kSearchStrength = 8 + + // nextEmit is where in src the next emitLiteral should start from. + nextEmit := s + cv := load6432(src, s) + + // Relative offsets + offset1 := int32(blk.recentOffsets[0]) + offset2 := int32(blk.recentOffsets[1]) + + addLiterals := func(s *seq, until int32) { + if until == nextEmit { + return + } + blk.literals = append(blk.literals, src[nextEmit:until]...) + s.litLen = uint32(until - nextEmit) + } + if debugEncoder { + println("recent offsets:", blk.recentOffsets) + } + +encodeLoop: + for { + var t int32 + for { + + nextHashL := hashLen(cv, dFastLongTableBits, dFastLongLen) + nextHashS := hashLen(cv, dFastShortTableBits, dFastShortLen) + candidateL := e.longTable[nextHashL] + candidateS := e.table[nextHashS] + + const repOff = 1 + repIndex := s - offset1 + repOff + entry := tableEntry{offset: s + e.cur, val: uint32(cv)} + e.longTable[nextHashL] = entry + e.table[nextHashS] = entry + + if len(blk.sequences) > 2 { + if load3232(src, repIndex) == uint32(cv>>(repOff*8)) { + // Consider history as well. + var seq seq + //length := 4 + e.matchlen(s+4+repOff, repIndex+4, src) + length := 4 + int32(matchLen(src[s+4+repOff:], src[repIndex+4:])) + + seq.matchLen = uint32(length - zstdMinMatch) + + // We might be able to match backwards. + // Extend as long as we can. + start := s + repOff + // We end the search early, so we don't risk 0 literals + // and have to do special offset treatment. + startLimit := nextEmit + 1 + + tMin := max(s-e.maxMatchOff, 0) + for repIndex > tMin && start > startLimit && src[repIndex-1] == src[start-1] { + repIndex-- + start-- + seq.matchLen++ + } + addLiterals(&seq, start) + + // rep 0 + seq.offset = 1 + if debugSequences { + println("repeat sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + s += length + repOff + nextEmit = s + if s >= sLimit { + if debugEncoder { + println("repeat ended", s, length) + + } + break encodeLoop + } + cv = load6432(src, s) + continue + } + } + // Find the offsets of our two matches. + coffsetL := s - (candidateL.offset - e.cur) + coffsetS := s - (candidateS.offset - e.cur) + + // Check if we have a long match. + if coffsetL < e.maxMatchOff && uint32(cv) == candidateL.val { + // Found a long match, likely at least 8 bytes. + // Reference encoder checks all 8 bytes, we only check 4, + // but the likelihood of both the first 4 bytes and the hash matching should be enough. + t = candidateL.offset - e.cur + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d). cur: %d", s, t, e.cur)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugMatches { + println("long match") + } + break + } + + // Check if we have a short match. + if coffsetS < e.maxMatchOff && uint32(cv) == candidateS.val { + // found a regular match + // See if we can find a long match at s+1 + const checkAt = 1 + cv := load6432(src, s+checkAt) + nextHashL = hashLen(cv, dFastLongTableBits, dFastLongLen) + candidateL = e.longTable[nextHashL] + coffsetL = s - (candidateL.offset - e.cur) + checkAt + + // We can store it, since we have at least a 4 byte match. + e.longTable[nextHashL] = tableEntry{offset: s + checkAt + e.cur, val: uint32(cv)} + if coffsetL < e.maxMatchOff && uint32(cv) == candidateL.val { + // Found a long match, likely at least 8 bytes. + // Reference encoder checks all 8 bytes, we only check 4, + // but the likelihood of both the first 4 bytes and the hash matching should be enough. + t = candidateL.offset - e.cur + s += checkAt + if debugMatches { + println("long match (after short)") + } + break + } + + t = candidateS.offset - e.cur + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugAsserts && t < 0 { + panic("t<0") + } + if debugMatches { + println("short match") + } + break + } + + // No match found, move forward in input. + s += stepSize + ((s - nextEmit) >> (kSearchStrength - 1)) + if s >= sLimit { + break encodeLoop + } + cv = load6432(src, s) + } + + // A 4-byte match has been found. Update recent offsets. + // We'll later see if more than 4 bytes. + offset2 = offset1 + offset1 = s - t + + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + + // Extend the 4-byte match as long as possible. + //l := e.matchlen(s+4, t+4, src) + 4 + l := int32(matchLen(src[s+4:], src[t+4:])) + 4 + + // Extend backwards + tMin := max(s-e.maxMatchOff, 0) + for t > tMin && s > nextEmit && src[t-1] == src[s-1] { + s-- + t-- + l++ + } + + // Write our sequence + var seq seq + seq.litLen = uint32(s - nextEmit) + seq.matchLen = uint32(l - zstdMinMatch) + if seq.litLen > 0 { + blk.literals = append(blk.literals, src[nextEmit:s]...) + } + seq.offset = uint32(s-t) + 3 + s += l + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + nextEmit = s + if s >= sLimit { + break encodeLoop + } + + // Index match start+1 (long) and start+2 (short) + index0 := s - l + 1 + // Index match end-2 (long) and end-1 (short) + index1 := s - 2 + + cv0 := load6432(src, index0) + cv1 := load6432(src, index1) + te0 := tableEntry{offset: index0 + e.cur, val: uint32(cv0)} + te1 := tableEntry{offset: index1 + e.cur, val: uint32(cv1)} + e.longTable[hashLen(cv0, dFastLongTableBits, dFastLongLen)] = te0 + e.longTable[hashLen(cv1, dFastLongTableBits, dFastLongLen)] = te1 + cv0 >>= 8 + cv1 >>= 8 + te0.offset++ + te1.offset++ + te0.val = uint32(cv0) + te1.val = uint32(cv1) + e.table[hashLen(cv0, dFastShortTableBits, dFastShortLen)] = te0 + e.table[hashLen(cv1, dFastShortTableBits, dFastShortLen)] = te1 + + cv = load6432(src, s) + + if len(blk.sequences) <= 2 { + continue + } + + // Check offset 2 + for { + o2 := s - offset2 + if load3232(src, o2) != uint32(cv) { + // Do regular search + break + } + + // Store this, since we have it. + nextHashS := hashLen(cv1>>8, dFastShortTableBits, dFastShortLen) + nextHashL := hashLen(cv, dFastLongTableBits, dFastLongLen) + + // We have at least 4 byte match. + // No need to check backwards. We come straight from a match + //l := 4 + e.matchlen(s+4, o2+4, src) + l := 4 + int32(matchLen(src[s+4:], src[o2+4:])) + + entry := tableEntry{offset: s + e.cur, val: uint32(cv)} + e.longTable[nextHashL] = entry + e.table[nextHashS] = entry + seq.matchLen = uint32(l) - zstdMinMatch + seq.litLen = 0 + + // Since litlen is always 0, this is offset 1. + seq.offset = 1 + s += l + nextEmit = s + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + + // Swap offset 1 and 2. + offset1, offset2 = offset2, offset1 + if s >= sLimit { + // Finished + break encodeLoop + } + cv = load6432(src, s) + } + } + + if int(nextEmit) < len(src) { + blk.literals = append(blk.literals, src[nextEmit:]...) + blk.extraLits = len(src) - int(nextEmit) + } + if debugEncoder { + println("returning, recent offsets:", blk.recentOffsets, "extra literals:", blk.extraLits) + } + + // We do not store history, so we must offset e.cur to avoid false matches for next user. + if e.cur < e.bufferReset { + e.cur += int32(len(src)) + } +} + +// Encode will encode the content, with a dictionary if initialized for it. +func (e *doubleFastEncoderDict) Encode(blk *blockEnc, src []byte) { + const ( + // Input margin is the number of bytes we read (8) + // and the maximum we will read ahead (2) + inputMargin = 8 + 2 + minNonLiteralBlockSize = 16 + ) + + // Protect against e.cur wraparound. + for e.cur >= e.bufferReset-int32(len(e.hist)) { + if len(e.hist) == 0 { + for i := range e.table[:] { + e.table[i] = tableEntry{} + } + for i := range e.longTable[:] { + e.longTable[i] = tableEntry{} + } + e.markAllShardsDirty() + e.cur = e.maxMatchOff + break + } + // Shift down everything in the table that isn't already too far away. + minOff := e.cur + int32(len(e.hist)) - e.maxMatchOff + for i := range e.table[:] { + v := e.table[i].offset + if v < minOff { + v = 0 + } else { + v = v - e.cur + e.maxMatchOff + } + e.table[i].offset = v + } + for i := range e.longTable[:] { + v := e.longTable[i].offset + if v < minOff { + v = 0 + } else { + v = v - e.cur + e.maxMatchOff + } + e.longTable[i].offset = v + } + e.markAllShardsDirty() + e.cur = e.maxMatchOff + break + } + + s := e.addBlock(src) + blk.size = len(src) + if len(src) < minNonLiteralBlockSize { + blk.extraLits = len(src) + blk.literals = blk.literals[:len(src)] + copy(blk.literals, src) + return + } + + // Override src + src = e.hist + sLimit := int32(len(src)) - inputMargin + // stepSize is the number of bytes to skip on every main loop iteration. + // It should be >= 1. + const stepSize = 1 + + const kSearchStrength = 8 + + // nextEmit is where in src the next emitLiteral should start from. + nextEmit := s + cv := load6432(src, s) + + // Relative offsets + offset1 := int32(blk.recentOffsets[0]) + offset2 := int32(blk.recentOffsets[1]) + + addLiterals := func(s *seq, until int32) { + if until == nextEmit { + return + } + blk.literals = append(blk.literals, src[nextEmit:until]...) + s.litLen = uint32(until - nextEmit) + } + if debugEncoder { + println("recent offsets:", blk.recentOffsets) + } + +encodeLoop: + for { + var t int32 + // We allow the encoder to optionally turn off repeat offsets across blocks + canRepeat := len(blk.sequences) > 2 + + for { + if debugAsserts && canRepeat && offset1 == 0 { + panic("offset0 was 0") + } + + nextHashL := hashLen(cv, dFastLongTableBits, dFastLongLen) + nextHashS := hashLen(cv, dFastShortTableBits, dFastShortLen) + candidateL := e.longTable[nextHashL] + candidateS := e.table[nextHashS] + + const repOff = 1 + repIndex := s - offset1 + repOff + entry := tableEntry{offset: s + e.cur, val: uint32(cv)} + e.longTable[nextHashL] = entry + e.markLongShardDirty(nextHashL) + e.table[nextHashS] = entry + e.markShardDirty(nextHashS) + + if canRepeat { + if repIndex >= 0 && load3232(src, repIndex) == uint32(cv>>(repOff*8)) { + // Consider history as well. + var seq seq + length := 4 + e.matchlen(s+4+repOff, repIndex+4, src) + + seq.matchLen = uint32(length - zstdMinMatch) + + // We might be able to match backwards. + // Extend as long as we can. + start := s + repOff + // We end the search early, so we don't risk 0 literals + // and have to do special offset treatment. + startLimit := nextEmit + 1 + + tMin := max(s-e.maxMatchOff, 0) + for repIndex > tMin && start > startLimit && src[repIndex-1] == src[start-1] && seq.matchLen < maxMatchLength-zstdMinMatch-1 { + repIndex-- + start-- + seq.matchLen++ + } + addLiterals(&seq, start) + + // rep 0 + seq.offset = 1 + if debugSequences { + println("repeat sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + s += length + repOff + nextEmit = s + if s >= sLimit { + if debugEncoder { + println("repeat ended", s, length) + + } + break encodeLoop + } + cv = load6432(src, s) + continue + } + } + // Find the offsets of our two matches. + coffsetL := s - (candidateL.offset - e.cur) + coffsetS := s - (candidateS.offset - e.cur) + + // Check if we have a long match. + if coffsetL < e.maxMatchOff && uint32(cv) == candidateL.val { + // Found a long match, likely at least 8 bytes. + // Reference encoder checks all 8 bytes, we only check 4, + // but the likelihood of both the first 4 bytes and the hash matching should be enough. + t = candidateL.offset - e.cur + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugMatches { + println("long match") + } + break + } + + // Check if we have a short match. + if coffsetS < e.maxMatchOff && uint32(cv) == candidateS.val { + // found a regular match + // See if we can find a long match at s+1 + const checkAt = 1 + cv := load6432(src, s+checkAt) + nextHashL = hashLen(cv, dFastLongTableBits, dFastLongLen) + candidateL = e.longTable[nextHashL] + coffsetL = s - (candidateL.offset - e.cur) + checkAt + + // We can store it, since we have at least a 4 byte match. + e.longTable[nextHashL] = tableEntry{offset: s + checkAt + e.cur, val: uint32(cv)} + e.markLongShardDirty(nextHashL) + if coffsetL < e.maxMatchOff && uint32(cv) == candidateL.val { + // Found a long match, likely at least 8 bytes. + // Reference encoder checks all 8 bytes, we only check 4, + // but the likelihood of both the first 4 bytes and the hash matching should be enough. + t = candidateL.offset - e.cur + s += checkAt + if debugMatches { + println("long match (after short)") + } + break + } + + t = candidateS.offset - e.cur + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugAsserts && t < 0 { + panic("t<0") + } + if debugMatches { + println("short match") + } + break + } + + // No match found, move forward in input. + s += stepSize + ((s - nextEmit) >> (kSearchStrength - 1)) + if s >= sLimit { + break encodeLoop + } + cv = load6432(src, s) + } + + // A 4-byte match has been found. Update recent offsets. + // We'll later see if more than 4 bytes. + offset2 = offset1 + offset1 = s - t + + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + + if debugAsserts && canRepeat && int(offset1) > len(src) { + panic("invalid offset") + } + + // Extend the 4-byte match as long as possible. + l := e.matchlen(s+4, t+4, src) + 4 + + // Extend backwards + tMin := max(s-e.maxMatchOff, 0) + for t > tMin && s > nextEmit && src[t-1] == src[s-1] && l < maxMatchLength { + s-- + t-- + l++ + } + + // Write our sequence + var seq seq + seq.litLen = uint32(s - nextEmit) + seq.matchLen = uint32(l - zstdMinMatch) + if seq.litLen > 0 { + blk.literals = append(blk.literals, src[nextEmit:s]...) + } + seq.offset = uint32(s-t) + 3 + s += l + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + nextEmit = s + if s >= sLimit { + break encodeLoop + } + + // Index match start+1 (long) and start+2 (short) + index0 := s - l + 1 + // Index match end-2 (long) and end-1 (short) + index1 := s - 2 + + cv0 := load6432(src, index0) + cv1 := load6432(src, index1) + te0 := tableEntry{offset: index0 + e.cur, val: uint32(cv0)} + te1 := tableEntry{offset: index1 + e.cur, val: uint32(cv1)} + longHash1 := hashLen(cv0, dFastLongTableBits, dFastLongLen) + longHash2 := hashLen(cv1, dFastLongTableBits, dFastLongLen) + e.longTable[longHash1] = te0 + e.longTable[longHash2] = te1 + e.markLongShardDirty(longHash1) + e.markLongShardDirty(longHash2) + cv0 >>= 8 + cv1 >>= 8 + te0.offset++ + te1.offset++ + te0.val = uint32(cv0) + te1.val = uint32(cv1) + hashVal1 := hashLen(cv0, dFastShortTableBits, dFastShortLen) + hashVal2 := hashLen(cv1, dFastShortTableBits, dFastShortLen) + e.table[hashVal1] = te0 + e.markShardDirty(hashVal1) + e.table[hashVal2] = te1 + e.markShardDirty(hashVal2) + + cv = load6432(src, s) + + if !canRepeat { + continue + } + + // Check offset 2 + for { + o2 := s - offset2 + if load3232(src, o2) != uint32(cv) { + // Do regular search + break + } + + // Store this, since we have it. + nextHashL := hashLen(cv, dFastLongTableBits, dFastLongLen) + nextHashS := hashLen(cv, dFastShortTableBits, dFastShortLen) + + // We have at least 4 byte match. + // No need to check backwards. We come straight from a match + l := 4 + e.matchlen(s+4, o2+4, src) + + entry := tableEntry{offset: s + e.cur, val: uint32(cv)} + e.longTable[nextHashL] = entry + e.markLongShardDirty(nextHashL) + e.table[nextHashS] = entry + e.markShardDirty(nextHashS) + seq.matchLen = uint32(l) - zstdMinMatch + seq.litLen = 0 + + // Since litlen is always 0, this is offset 1. + seq.offset = 1 + s += l + nextEmit = s + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + + // Swap offset 1 and 2. + offset1, offset2 = offset2, offset1 + if s >= sLimit { + // Finished + break encodeLoop + } + cv = load6432(src, s) + } + } + + if int(nextEmit) < len(src) { + blk.literals = append(blk.literals, src[nextEmit:]...) + blk.extraLits = len(src) - int(nextEmit) + } + blk.recentOffsets[0] = uint32(offset1) + blk.recentOffsets[1] = uint32(offset2) + if debugEncoder { + println("returning, recent offsets:", blk.recentOffsets, "extra literals:", blk.extraLits) + } + // If we encoded more than 64K mark all dirty. + if len(src) > 64<<10 { + e.markAllShardsDirty() + } +} + +// ResetDict will reset and set a dictionary if not nil +func (e *doubleFastEncoder) Reset(d *dict, singleBlock bool) { + e.fastEncoder.Reset(d, singleBlock) + if d != nil { + panic("doubleFastEncoder: Reset with dict not supported") + } +} + +// ResetDict will reset and set a dictionary if not nil +func (e *doubleFastEncoderDict) Reset(d *dict, singleBlock bool) { + allDirty := e.allDirty + e.fastEncoderDict.Reset(d, singleBlock) + if d == nil { + return + } + + // Init or copy dict table + if len(e.dictLongTable) != len(e.longTable) || d.id != e.lastDictID { + if len(e.dictLongTable) != len(e.longTable) { + e.dictLongTable = make([]tableEntry, len(e.longTable)) + } + if len(d.content) >= 8 { + cv := load6432(d.content, 0) + e.dictLongTable[hashLen(cv, dFastLongTableBits, dFastLongLen)] = tableEntry{ + val: uint32(cv), + offset: e.maxMatchOff, + } + end := int32(len(d.content)) - 8 + e.maxMatchOff + for i := e.maxMatchOff + 1; i < end; i++ { + cv = cv>>8 | (uint64(d.content[i-e.maxMatchOff+7]) << 56) + e.dictLongTable[hashLen(cv, dFastLongTableBits, dFastLongLen)] = tableEntry{ + val: uint32(cv), + offset: i, + } + } + } + e.lastDictID = d.id + allDirty = true + } + // Reset table to initial state + e.cur = e.maxMatchOff + + dirtyShardCnt := 0 + if !allDirty { + for i := range e.longTableShardDirty { + if e.longTableShardDirty[i] { + dirtyShardCnt++ + } + } + } + + if allDirty || dirtyShardCnt > dLongTableShardCnt/2 { + //copy(e.longTable[:], e.dictLongTable) + e.longTable = *(*[dFastLongTableSize]tableEntry)(e.dictLongTable) + for i := range e.longTableShardDirty { + e.longTableShardDirty[i] = false + } + return + } + for i := range e.longTableShardDirty { + if !e.longTableShardDirty[i] { + continue + } + + // copy(e.longTable[i*dLongTableShardSize:(i+1)*dLongTableShardSize], e.dictLongTable[i*dLongTableShardSize:(i+1)*dLongTableShardSize]) + *(*[dLongTableShardSize]tableEntry)(e.longTable[i*dLongTableShardSize:]) = *(*[dLongTableShardSize]tableEntry)(e.dictLongTable[i*dLongTableShardSize:]) + + e.longTableShardDirty[i] = false + } +} + +func (e *doubleFastEncoderDict) markLongShardDirty(entryNum uint32) { + e.longTableShardDirty[entryNum/dLongTableShardSize] = true +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/enc_fast.go b/backend/vendor/github.com/klauspost/compress/zstd/enc_fast.go new file mode 100644 index 0000000..9180a3a --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/enc_fast.go @@ -0,0 +1,873 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "fmt" +) + +const ( + tableBits = 15 // Bits used in the table + tableSize = 1 << tableBits // Size of the table + tableShardCnt = 1 << (tableBits - dictShardBits) // Number of shards in the table + tableShardSize = tableSize / tableShardCnt // Size of an individual shard + tableFastHashLen = 6 + tableMask = tableSize - 1 // Mask for table indices. Redundant, but can eliminate bounds checks. + maxMatchLength = 131074 +) + +type tableEntry struct { + val uint32 + offset int32 +} + +type fastEncoder struct { + fastBase + table [tableSize]tableEntry +} + +type fastEncoderDict struct { + fastEncoder + dictTable []tableEntry + tableShardDirty [tableShardCnt]bool + allDirty bool +} + +// Encode mimmics functionality in zstd_fast.c +func (e *fastEncoder) Encode(blk *blockEnc, src []byte) { + const ( + inputMargin = 8 + minNonLiteralBlockSize = 1 + 1 + inputMargin + ) + + // Protect against e.cur wraparound. + for e.cur >= e.bufferReset-int32(len(e.hist)) { + if len(e.hist) == 0 { + for i := range e.table[:] { + e.table[i] = tableEntry{} + } + e.cur = e.maxMatchOff + break + } + // Shift down everything in the table that isn't already too far away. + minOff := e.cur + int32(len(e.hist)) - e.maxMatchOff + for i := range e.table[:] { + v := e.table[i].offset + if v < minOff { + v = 0 + } else { + v = v - e.cur + e.maxMatchOff + } + e.table[i].offset = v + } + e.cur = e.maxMatchOff + break + } + + s := e.addBlock(src) + blk.size = len(src) + if len(src) < minNonLiteralBlockSize { + blk.extraLits = len(src) + blk.literals = blk.literals[:len(src)] + copy(blk.literals, src) + return + } + + // Override src + src = e.hist + sLimit := int32(len(src)) - inputMargin + // stepSize is the number of bytes to skip on every main loop iteration. + // It should be >= 2. + const stepSize = 2 + + // TEMPLATE + const hashLog = tableBits + // seems global, but would be nice to tweak. + const kSearchStrength = 6 + + // nextEmit is where in src the next emitLiteral should start from. + nextEmit := s + cv := load6432(src, s) + + // Relative offsets + offset1 := int32(blk.recentOffsets[0]) + offset2 := int32(blk.recentOffsets[1]) + + addLiterals := func(s *seq, until int32) { + if until == nextEmit { + return + } + blk.literals = append(blk.literals, src[nextEmit:until]...) + s.litLen = uint32(until - nextEmit) + } + if debugEncoder { + println("recent offsets:", blk.recentOffsets) + } + +encodeLoop: + for { + // t will contain the match offset when we find one. + // When existing the search loop, we have already checked 4 bytes. + var t int32 + + // We will not use repeat offsets across blocks. + // By not using them for the first 3 matches + canRepeat := len(blk.sequences) > 2 + + for { + if debugAsserts && canRepeat && offset1 == 0 { + panic("offset0 was 0") + } + + nextHash := hashLen(cv, hashLog, tableFastHashLen) + nextHash2 := hashLen(cv>>8, hashLog, tableFastHashLen) + candidate := e.table[nextHash] + candidate2 := e.table[nextHash2] + repIndex := s - offset1 + 2 + + e.table[nextHash] = tableEntry{offset: s + e.cur, val: uint32(cv)} + e.table[nextHash2] = tableEntry{offset: s + e.cur + 1, val: uint32(cv >> 8)} + + if canRepeat && repIndex >= 0 && load3232(src, repIndex) == uint32(cv>>16) { + // Consider history as well. + var seq seq + length := 4 + e.matchlen(s+6, repIndex+4, src) + seq.matchLen = uint32(length - zstdMinMatch) + + // We might be able to match backwards. + // Extend as long as we can. + start := s + 2 + // We end the search early, so we don't risk 0 literals + // and have to do special offset treatment. + startLimit := nextEmit + 1 + + sMin := max(s-e.maxMatchOff, 0) + for repIndex > sMin && start > startLimit && src[repIndex-1] == src[start-1] && seq.matchLen < maxMatchLength-zstdMinMatch { + repIndex-- + start-- + seq.matchLen++ + } + addLiterals(&seq, start) + + // rep 0 + seq.offset = 1 + if debugSequences { + println("repeat sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + s += length + 2 + nextEmit = s + if s >= sLimit { + if debugEncoder { + println("repeat ended", s, length) + + } + break encodeLoop + } + cv = load6432(src, s) + continue + } + coffset0 := s - (candidate.offset - e.cur) + coffset1 := s - (candidate2.offset - e.cur) + 1 + if coffset0 < e.maxMatchOff && uint32(cv) == candidate.val { + // found a regular match + t = candidate.offset - e.cur + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + break + } + + if coffset1 < e.maxMatchOff && uint32(cv>>8) == candidate2.val { + // found a regular match + t = candidate2.offset - e.cur + s++ + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugAsserts && t < 0 { + panic("t<0") + } + break + } + s += stepSize + ((s - nextEmit) >> (kSearchStrength - 1)) + if s >= sLimit { + break encodeLoop + } + cv = load6432(src, s) + } + // A 4-byte match has been found. We'll later see if more than 4 bytes. + offset2 = offset1 + offset1 = s - t + + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + + if debugAsserts && canRepeat && int(offset1) > len(src) { + panic("invalid offset") + } + + // Extend the 4-byte match as long as possible. + l := e.matchlen(s+4, t+4, src) + 4 + + // Extend backwards + tMin := max(s-e.maxMatchOff, 0) + for t > tMin && s > nextEmit && src[t-1] == src[s-1] && l < maxMatchLength { + s-- + t-- + l++ + } + + // Write our sequence. + var seq seq + seq.litLen = uint32(s - nextEmit) + seq.matchLen = uint32(l - zstdMinMatch) + if seq.litLen > 0 { + blk.literals = append(blk.literals, src[nextEmit:s]...) + } + // Don't use repeat offsets + seq.offset = uint32(s-t) + 3 + s += l + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + nextEmit = s + if s >= sLimit { + break encodeLoop + } + cv = load6432(src, s) + + // Check offset 2 + if o2 := s - offset2; canRepeat && load3232(src, o2) == uint32(cv) { + // We have at least 4 byte match. + // No need to check backwards. We come straight from a match + l := 4 + e.matchlen(s+4, o2+4, src) + + // Store this, since we have it. + nextHash := hashLen(cv, hashLog, tableFastHashLen) + e.table[nextHash] = tableEntry{offset: s + e.cur, val: uint32(cv)} + seq.matchLen = uint32(l) - zstdMinMatch + seq.litLen = 0 + // Since litlen is always 0, this is offset 1. + seq.offset = 1 + s += l + nextEmit = s + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + + // Swap offset 1 and 2. + offset1, offset2 = offset2, offset1 + if s >= sLimit { + break encodeLoop + } + // Prepare next loop. + cv = load6432(src, s) + } + } + + if int(nextEmit) < len(src) { + blk.literals = append(blk.literals, src[nextEmit:]...) + blk.extraLits = len(src) - int(nextEmit) + } + blk.recentOffsets[0] = uint32(offset1) + blk.recentOffsets[1] = uint32(offset2) + if debugEncoder { + println("returning, recent offsets:", blk.recentOffsets, "extra literals:", blk.extraLits) + } +} + +// EncodeNoHist will encode a block with no history and no following blocks. +// Most notable difference is that src will not be copied for history and +// we do not need to check for max match length. +func (e *fastEncoder) EncodeNoHist(blk *blockEnc, src []byte) { + const ( + inputMargin = 8 + minNonLiteralBlockSize = 1 + 1 + inputMargin + ) + if debugEncoder { + if len(src) > maxCompressedBlockSize { + panic("src too big") + } + } + + // Protect against e.cur wraparound. + if e.cur >= e.bufferReset { + for i := range e.table[:] { + e.table[i] = tableEntry{} + } + e.cur = e.maxMatchOff + } + + s := int32(0) + blk.size = len(src) + if len(src) < minNonLiteralBlockSize { + blk.extraLits = len(src) + blk.literals = blk.literals[:len(src)] + copy(blk.literals, src) + return + } + + sLimit := int32(len(src)) - inputMargin + // stepSize is the number of bytes to skip on every main loop iteration. + // It should be >= 2. + const stepSize = 2 + + // TEMPLATE + const hashLog = tableBits + // seems global, but would be nice to tweak. + const kSearchStrength = 6 + + // nextEmit is where in src the next emitLiteral should start from. + nextEmit := s + cv := load6432(src, s) + + // Relative offsets + offset1 := int32(blk.recentOffsets[0]) + offset2 := int32(blk.recentOffsets[1]) + + addLiterals := func(s *seq, until int32) { + if until == nextEmit { + return + } + blk.literals = append(blk.literals, src[nextEmit:until]...) + s.litLen = uint32(until - nextEmit) + } + if debugEncoder { + println("recent offsets:", blk.recentOffsets) + } + +encodeLoop: + for { + // t will contain the match offset when we find one. + // When existing the search loop, we have already checked 4 bytes. + var t int32 + + // We will not use repeat offsets across blocks. + // By not using them for the first 3 matches + + for { + nextHash := hashLen(cv, hashLog, tableFastHashLen) + nextHash2 := hashLen(cv>>8, hashLog, tableFastHashLen) + candidate := e.table[nextHash] + candidate2 := e.table[nextHash2] + repIndex := s - offset1 + 2 + + e.table[nextHash] = tableEntry{offset: s + e.cur, val: uint32(cv)} + e.table[nextHash2] = tableEntry{offset: s + e.cur + 1, val: uint32(cv >> 8)} + + if len(blk.sequences) > 2 && load3232(src, repIndex) == uint32(cv>>16) { + // Consider history as well. + var seq seq + length := 4 + e.matchlen(s+6, repIndex+4, src) + + seq.matchLen = uint32(length - zstdMinMatch) + + // We might be able to match backwards. + // Extend as long as we can. + start := s + 2 + // We end the search early, so we don't risk 0 literals + // and have to do special offset treatment. + startLimit := nextEmit + 1 + + sMin := max(s-e.maxMatchOff, 0) + for repIndex > sMin && start > startLimit && src[repIndex-1] == src[start-1] { + repIndex-- + start-- + seq.matchLen++ + } + addLiterals(&seq, start) + + // rep 0 + seq.offset = 1 + if debugSequences { + println("repeat sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + s += length + 2 + nextEmit = s + if s >= sLimit { + if debugEncoder { + println("repeat ended", s, length) + + } + break encodeLoop + } + cv = load6432(src, s) + continue + } + coffset0 := s - (candidate.offset - e.cur) + coffset1 := s - (candidate2.offset - e.cur) + 1 + if coffset0 < e.maxMatchOff && uint32(cv) == candidate.val { + // found a regular match + t = candidate.offset - e.cur + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugAsserts && t < 0 { + panic(fmt.Sprintf("t (%d) < 0, candidate.offset: %d, e.cur: %d, coffset0: %d, e.maxMatchOff: %d", t, candidate.offset, e.cur, coffset0, e.maxMatchOff)) + } + break + } + + if coffset1 < e.maxMatchOff && uint32(cv>>8) == candidate2.val { + // found a regular match + t = candidate2.offset - e.cur + s++ + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugAsserts && t < 0 { + panic("t<0") + } + break + } + s += stepSize + ((s - nextEmit) >> (kSearchStrength - 1)) + if s >= sLimit { + break encodeLoop + } + cv = load6432(src, s) + } + // A 4-byte match has been found. We'll later see if more than 4 bytes. + offset2 = offset1 + offset1 = s - t + + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + + if debugAsserts && t < 0 { + panic(fmt.Sprintf("t (%d) < 0 ", t)) + } + // Extend the 4-byte match as long as possible. + l := e.matchlen(s+4, t+4, src) + 4 + + // Extend backwards + tMin := max(s-e.maxMatchOff, 0) + for t > tMin && s > nextEmit && src[t-1] == src[s-1] { + s-- + t-- + l++ + } + + // Write our sequence. + var seq seq + seq.litLen = uint32(s - nextEmit) + seq.matchLen = uint32(l - zstdMinMatch) + if seq.litLen > 0 { + blk.literals = append(blk.literals, src[nextEmit:s]...) + } + // Don't use repeat offsets + seq.offset = uint32(s-t) + 3 + s += l + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + nextEmit = s + if s >= sLimit { + break encodeLoop + } + cv = load6432(src, s) + + // Check offset 2 + if o2 := s - offset2; len(blk.sequences) > 2 && load3232(src, o2) == uint32(cv) { + // We have at least 4 byte match. + // No need to check backwards. We come straight from a match + l := 4 + e.matchlen(s+4, o2+4, src) + + // Store this, since we have it. + nextHash := hashLen(cv, hashLog, tableFastHashLen) + e.table[nextHash] = tableEntry{offset: s + e.cur, val: uint32(cv)} + seq.matchLen = uint32(l) - zstdMinMatch + seq.litLen = 0 + // Since litlen is always 0, this is offset 1. + seq.offset = 1 + s += l + nextEmit = s + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + + // Swap offset 1 and 2. + offset1, offset2 = offset2, offset1 + if s >= sLimit { + break encodeLoop + } + // Prepare next loop. + cv = load6432(src, s) + } + } + + if int(nextEmit) < len(src) { + blk.literals = append(blk.literals, src[nextEmit:]...) + blk.extraLits = len(src) - int(nextEmit) + } + if debugEncoder { + println("returning, recent offsets:", blk.recentOffsets, "extra literals:", blk.extraLits) + } + // We do not store history, so we must offset e.cur to avoid false matches for next user. + if e.cur < e.bufferReset { + e.cur += int32(len(src)) + } +} + +// Encode will encode the content, with a dictionary if initialized for it. +func (e *fastEncoderDict) Encode(blk *blockEnc, src []byte) { + const ( + inputMargin = 8 + minNonLiteralBlockSize = 1 + 1 + inputMargin + ) + if e.allDirty || len(src) > 32<<10 { + e.fastEncoder.Encode(blk, src) + e.allDirty = true + return + } + // Protect against e.cur wraparound. + for e.cur >= e.bufferReset-int32(len(e.hist)) { + if len(e.hist) == 0 { + e.table = [tableSize]tableEntry{} + e.cur = e.maxMatchOff + break + } + // Shift down everything in the table that isn't already too far away. + minOff := e.cur + int32(len(e.hist)) - e.maxMatchOff + for i := range e.table[:] { + v := e.table[i].offset + if v < minOff { + v = 0 + } else { + v = v - e.cur + e.maxMatchOff + } + e.table[i].offset = v + } + e.cur = e.maxMatchOff + break + } + + s := e.addBlock(src) + blk.size = len(src) + if len(src) < minNonLiteralBlockSize { + blk.extraLits = len(src) + blk.literals = blk.literals[:len(src)] + copy(blk.literals, src) + return + } + + // Override src + src = e.hist + sLimit := int32(len(src)) - inputMargin + // stepSize is the number of bytes to skip on every main loop iteration. + // It should be >= 2. + const stepSize = 2 + + // TEMPLATE + const hashLog = tableBits + // seems global, but would be nice to tweak. + const kSearchStrength = 7 + + // nextEmit is where in src the next emitLiteral should start from. + nextEmit := s + cv := load6432(src, s) + + // Relative offsets + offset1 := int32(blk.recentOffsets[0]) + offset2 := int32(blk.recentOffsets[1]) + + addLiterals := func(s *seq, until int32) { + if until == nextEmit { + return + } + blk.literals = append(blk.literals, src[nextEmit:until]...) + s.litLen = uint32(until - nextEmit) + } + if debugEncoder { + println("recent offsets:", blk.recentOffsets) + } + +encodeLoop: + for { + // t will contain the match offset when we find one. + // When existing the search loop, we have already checked 4 bytes. + var t int32 + + // We will not use repeat offsets across blocks. + // By not using them for the first 3 matches + canRepeat := len(blk.sequences) > 2 + + for { + if debugAsserts && canRepeat && offset1 == 0 { + panic("offset0 was 0") + } + + nextHash := hashLen(cv, hashLog, tableFastHashLen) + nextHash2 := hashLen(cv>>8, hashLog, tableFastHashLen) + candidate := e.table[nextHash] + candidate2 := e.table[nextHash2] + repIndex := s - offset1 + 2 + + e.table[nextHash] = tableEntry{offset: s + e.cur, val: uint32(cv)} + e.markShardDirty(nextHash) + e.table[nextHash2] = tableEntry{offset: s + e.cur + 1, val: uint32(cv >> 8)} + e.markShardDirty(nextHash2) + + if canRepeat && repIndex >= 0 && load3232(src, repIndex) == uint32(cv>>16) { + // Consider history as well. + var seq seq + length := 4 + e.matchlen(s+6, repIndex+4, src) + + seq.matchLen = uint32(length - zstdMinMatch) + + // We might be able to match backwards. + // Extend as long as we can. + start := s + 2 + // We end the search early, so we don't risk 0 literals + // and have to do special offset treatment. + startLimit := nextEmit + 1 + + sMin := max(s-e.maxMatchOff, 0) + for repIndex > sMin && start > startLimit && src[repIndex-1] == src[start-1] && seq.matchLen < maxMatchLength-zstdMinMatch { + repIndex-- + start-- + seq.matchLen++ + } + addLiterals(&seq, start) + + // rep 0 + seq.offset = 1 + if debugSequences { + println("repeat sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + s += length + 2 + nextEmit = s + if s >= sLimit { + if debugEncoder { + println("repeat ended", s, length) + + } + break encodeLoop + } + cv = load6432(src, s) + continue + } + coffset0 := s - (candidate.offset - e.cur) + coffset1 := s - (candidate2.offset - e.cur) + 1 + if coffset0 < e.maxMatchOff && uint32(cv) == candidate.val { + // found a regular match + t = candidate.offset - e.cur + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + break + } + + if coffset1 < e.maxMatchOff && uint32(cv>>8) == candidate2.val { + // found a regular match + t = candidate2.offset - e.cur + s++ + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + if debugAsserts && s-t > e.maxMatchOff { + panic("s - t >e.maxMatchOff") + } + if debugAsserts && t < 0 { + panic("t<0") + } + break + } + s += stepSize + ((s - nextEmit) >> (kSearchStrength - 1)) + if s >= sLimit { + break encodeLoop + } + cv = load6432(src, s) + } + // A 4-byte match has been found. We'll later see if more than 4 bytes. + offset2 = offset1 + offset1 = s - t + + if debugAsserts && s <= t { + panic(fmt.Sprintf("s (%d) <= t (%d)", s, t)) + } + + if debugAsserts && canRepeat && int(offset1) > len(src) { + panic("invalid offset") + } + + // Extend the 4-byte match as long as possible. + l := e.matchlen(s+4, t+4, src) + 4 + + // Extend backwards + tMin := max(s-e.maxMatchOff, 0) + for t > tMin && s > nextEmit && src[t-1] == src[s-1] && l < maxMatchLength { + s-- + t-- + l++ + } + + // Write our sequence. + var seq seq + seq.litLen = uint32(s - nextEmit) + seq.matchLen = uint32(l - zstdMinMatch) + if seq.litLen > 0 { + blk.literals = append(blk.literals, src[nextEmit:s]...) + } + // Don't use repeat offsets + seq.offset = uint32(s-t) + 3 + s += l + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + nextEmit = s + if s >= sLimit { + break encodeLoop + } + cv = load6432(src, s) + + // Check offset 2 + if o2 := s - offset2; canRepeat && load3232(src, o2) == uint32(cv) { + // We have at least 4 byte match. + // No need to check backwards. We come straight from a match + l := 4 + e.matchlen(s+4, o2+4, src) + + // Store this, since we have it. + nextHash := hashLen(cv, hashLog, tableFastHashLen) + e.table[nextHash] = tableEntry{offset: s + e.cur, val: uint32(cv)} + e.markShardDirty(nextHash) + seq.matchLen = uint32(l) - zstdMinMatch + seq.litLen = 0 + // Since litlen is always 0, this is offset 1. + seq.offset = 1 + s += l + nextEmit = s + if debugSequences { + println("sequence", seq, "next s:", s) + } + blk.sequences = append(blk.sequences, seq) + + // Swap offset 1 and 2. + offset1, offset2 = offset2, offset1 + if s >= sLimit { + break encodeLoop + } + // Prepare next loop. + cv = load6432(src, s) + } + } + + if int(nextEmit) < len(src) { + blk.literals = append(blk.literals, src[nextEmit:]...) + blk.extraLits = len(src) - int(nextEmit) + } + blk.recentOffsets[0] = uint32(offset1) + blk.recentOffsets[1] = uint32(offset2) + if debugEncoder { + println("returning, recent offsets:", blk.recentOffsets, "extra literals:", blk.extraLits) + } +} + +// ResetDict will reset and set a dictionary if not nil +func (e *fastEncoder) Reset(d *dict, singleBlock bool) { + e.resetBase(d, singleBlock) + if d != nil { + panic("fastEncoder: Reset with dict") + } +} + +// ResetDict will reset and set a dictionary if not nil +func (e *fastEncoderDict) Reset(d *dict, singleBlock bool) { + e.resetBase(d, singleBlock) + if d == nil { + return + } + + // Init or copy dict table + if len(e.dictTable) != len(e.table) || d.id != e.lastDictID { + if len(e.dictTable) != len(e.table) { + e.dictTable = make([]tableEntry, len(e.table)) + } + if true { + end := e.maxMatchOff + int32(len(d.content)) - 8 + for i := e.maxMatchOff; i < end; i += 2 { + const hashLog = tableBits + + cv := load6432(d.content, i-e.maxMatchOff) + nextHash := hashLen(cv, hashLog, tableFastHashLen) // 0 -> 6 + nextHash1 := hashLen(cv>>8, hashLog, tableFastHashLen) // 1 -> 7 + e.dictTable[nextHash] = tableEntry{ + val: uint32(cv), + offset: i, + } + e.dictTable[nextHash1] = tableEntry{ + val: uint32(cv >> 8), + offset: i + 1, + } + } + } + e.lastDictID = d.id + e.allDirty = true + } + + e.cur = e.maxMatchOff + dirtyShardCnt := 0 + if !e.allDirty { + for i := range e.tableShardDirty { + if e.tableShardDirty[i] { + dirtyShardCnt++ + } + } + } + + const shardCnt = tableShardCnt + const shardSize = tableShardSize + if e.allDirty || dirtyShardCnt > shardCnt*4/6 { + //copy(e.table[:], e.dictTable) + e.table = *(*[tableSize]tableEntry)(e.dictTable) + for i := range e.tableShardDirty { + e.tableShardDirty[i] = false + } + e.allDirty = false + return + } + for i := range e.tableShardDirty { + if !e.tableShardDirty[i] { + continue + } + + //copy(e.table[i*shardSize:(i+1)*shardSize], e.dictTable[i*shardSize:(i+1)*shardSize]) + *(*[shardSize]tableEntry)(e.table[i*shardSize:]) = *(*[shardSize]tableEntry)(e.dictTable[i*shardSize:]) + e.tableShardDirty[i] = false + } + e.allDirty = false +} + +func (e *fastEncoderDict) markAllShardsDirty() { + e.allDirty = true +} + +func (e *fastEncoderDict) markShardDirty(entryNum uint32) { + e.tableShardDirty[entryNum/tableShardSize] = true +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/encoder.go b/backend/vendor/github.com/klauspost/compress/zstd/encoder.go new file mode 100644 index 0000000..8f8223c --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/encoder.go @@ -0,0 +1,642 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "crypto/rand" + "errors" + "fmt" + "io" + "math" + rdebug "runtime/debug" + "sync" + + "github.com/klauspost/compress/zstd/internal/xxhash" +) + +// Encoder provides encoding to Zstandard. +// An Encoder can be used for either compressing a stream via the +// io.WriteCloser interface supported by the Encoder or as multiple independent +// tasks via the EncodeAll function. +// Smaller encodes are encouraged to use the EncodeAll function. +// Use NewWriter to create a new instance. +type Encoder struct { + o encoderOptions + encoders chan encoder + state encoderState + init sync.Once +} + +type encoder interface { + Encode(blk *blockEnc, src []byte) + EncodeNoHist(blk *blockEnc, src []byte) + Block() *blockEnc + CRC() *xxhash.Digest + AppendCRC([]byte) []byte + WindowSize(size int64) int32 + UseBlock(*blockEnc) + Reset(d *dict, singleBlock bool) +} + +type encoderState struct { + w io.Writer + filling []byte + current []byte + previous []byte + encoder encoder + writing *blockEnc + err error + writeErr error + nWritten int64 + nInput int64 + frameContentSize int64 + headerWritten bool + eofWritten bool + fullFrameWritten bool + + // This waitgroup indicates an encode is running. + wg sync.WaitGroup + // This waitgroup indicates we have a block encoding/writing. + wWg sync.WaitGroup +} + +// NewWriter will create a new Zstandard encoder. +// If the encoder will be used for encoding blocks a nil writer can be used. +func NewWriter(w io.Writer, opts ...EOption) (*Encoder, error) { + initPredefined() + var e Encoder + e.o.setDefault() + for _, o := range opts { + err := o(&e.o) + if err != nil { + return nil, err + } + } + if w != nil { + e.Reset(w) + } + return &e, nil +} + +func (e *Encoder) initialize() { + if e.o.concurrent == 0 { + e.o.setDefault() + } + e.encoders = make(chan encoder, e.o.concurrent) + for i := 0; i < e.o.concurrent; i++ { + enc := e.o.encoder() + e.encoders <- enc + } +} + +// Reset will re-initialize the writer and new writes will encode to the supplied writer +// as a new, independent stream. +func (e *Encoder) Reset(w io.Writer) { + s := &e.state + s.wg.Wait() + s.wWg.Wait() + if cap(s.filling) == 0 { + s.filling = make([]byte, 0, e.o.blockSize) + } + if e.o.concurrent > 1 { + if cap(s.current) == 0 { + s.current = make([]byte, 0, e.o.blockSize) + } + if cap(s.previous) == 0 { + s.previous = make([]byte, 0, e.o.blockSize) + } + s.current = s.current[:0] + s.previous = s.previous[:0] + if s.writing == nil { + s.writing = &blockEnc{lowMem: e.o.lowMem} + s.writing.init() + } + s.writing.initNewEncode() + } + if s.encoder == nil { + s.encoder = e.o.encoder() + } + s.filling = s.filling[:0] + s.encoder.Reset(e.o.dict, false) + s.headerWritten = false + s.eofWritten = false + s.fullFrameWritten = false + s.w = w + s.err = nil + s.nWritten = 0 + s.nInput = 0 + s.writeErr = nil + s.frameContentSize = 0 +} + +// ResetContentSize will reset and set a content size for the next stream. +// If the bytes written does not match the size given an error will be returned +// when calling Close(). +// This is removed when Reset is called. +// Sizes <= 0 results in no content size set. +func (e *Encoder) ResetContentSize(w io.Writer, size int64) { + e.Reset(w) + if size >= 0 { + e.state.frameContentSize = size + } +} + +// Write data to the encoder. +// Input data will be buffered and as the buffer fills up +// content will be compressed and written to the output. +// When done writing, use Close to flush the remaining output +// and write CRC if requested. +func (e *Encoder) Write(p []byte) (n int, err error) { + s := &e.state + if s.eofWritten { + return 0, ErrEncoderClosed + } + for len(p) > 0 { + if len(p)+len(s.filling) < e.o.blockSize { + if e.o.crc { + _, _ = s.encoder.CRC().Write(p) + } + s.filling = append(s.filling, p...) + return n + len(p), nil + } + add := p + if len(p)+len(s.filling) > e.o.blockSize { + add = add[:e.o.blockSize-len(s.filling)] + } + if e.o.crc { + _, _ = s.encoder.CRC().Write(add) + } + s.filling = append(s.filling, add...) + p = p[len(add):] + n += len(add) + if len(s.filling) < e.o.blockSize { + return n, nil + } + err := e.nextBlock(false) + if err != nil { + return n, err + } + if debugAsserts && len(s.filling) > 0 { + panic(len(s.filling)) + } + } + return n, nil +} + +// nextBlock will synchronize and start compressing input in e.state.filling. +// If an error has occurred during encoding it will be returned. +func (e *Encoder) nextBlock(final bool) error { + s := &e.state + // Wait for current block. + s.wg.Wait() + if s.err != nil { + return s.err + } + if len(s.filling) > e.o.blockSize { + return fmt.Errorf("block > maxStoreBlockSize") + } + if !s.headerWritten { + // If we have a single block encode, do a sync compression. + if final && len(s.filling) == 0 && !e.o.fullZero { + s.headerWritten = true + s.fullFrameWritten = true + s.eofWritten = true + return nil + } + if final && len(s.filling) > 0 { + s.current = e.encodeAll(s.encoder, s.filling, s.current[:0]) + var n2 int + n2, s.err = s.w.Write(s.current) + if s.err != nil { + return s.err + } + s.nWritten += int64(n2) + s.nInput += int64(len(s.filling)) + s.current = s.current[:0] + s.filling = s.filling[:0] + s.headerWritten = true + s.fullFrameWritten = true + s.eofWritten = true + return nil + } + + var tmp [maxHeaderSize]byte + fh := frameHeader{ + ContentSize: uint64(s.frameContentSize), + WindowSize: uint32(s.encoder.WindowSize(s.frameContentSize)), + SingleSegment: false, + Checksum: e.o.crc, + DictID: e.o.dict.ID(), + } + + dst := fh.appendTo(tmp[:0]) + s.headerWritten = true + s.wWg.Wait() + var n2 int + n2, s.err = s.w.Write(dst) + if s.err != nil { + return s.err + } + s.nWritten += int64(n2) + } + if s.eofWritten { + // Ensure we only write it once. + final = false + } + + if len(s.filling) == 0 { + // Final block, but no data. + if final { + enc := s.encoder + blk := enc.Block() + blk.reset(nil) + blk.last = true + blk.encodeRaw(nil) + s.wWg.Wait() + _, s.err = s.w.Write(blk.output) + s.nWritten += int64(len(blk.output)) + s.eofWritten = true + } + return s.err + } + + // SYNC: + if e.o.concurrent == 1 { + src := s.filling + s.nInput += int64(len(s.filling)) + if debugEncoder { + println("Adding sync block,", len(src), "bytes, final:", final) + } + enc := s.encoder + blk := enc.Block() + blk.reset(nil) + enc.Encode(blk, src) + blk.last = final + if final { + s.eofWritten = true + } + + s.err = blk.encode(src, e.o.noEntropy, !e.o.allLitEntropy) + if s.err != nil { + return s.err + } + _, s.err = s.w.Write(blk.output) + s.nWritten += int64(len(blk.output)) + s.filling = s.filling[:0] + return s.err + } + + // Move blocks forward. + s.filling, s.current, s.previous = s.previous[:0], s.filling, s.current + s.nInput += int64(len(s.current)) + s.wg.Add(1) + if final { + s.eofWritten = true + } + go func(src []byte) { + if debugEncoder { + println("Adding block,", len(src), "bytes, final:", final) + } + defer func() { + if r := recover(); r != nil { + s.err = fmt.Errorf("panic while encoding: %v", r) + rdebug.PrintStack() + } + s.wg.Done() + }() + enc := s.encoder + blk := enc.Block() + enc.Encode(blk, src) + blk.last = final + // Wait for pending writes. + s.wWg.Wait() + if s.writeErr != nil { + s.err = s.writeErr + return + } + // Transfer encoders from previous write block. + blk.swapEncoders(s.writing) + // Transfer recent offsets to next. + enc.UseBlock(s.writing) + s.writing = blk + s.wWg.Add(1) + go func() { + defer func() { + if r := recover(); r != nil { + s.writeErr = fmt.Errorf("panic while encoding/writing: %v", r) + rdebug.PrintStack() + } + s.wWg.Done() + }() + s.writeErr = blk.encode(src, e.o.noEntropy, !e.o.allLitEntropy) + if s.writeErr != nil { + return + } + _, s.writeErr = s.w.Write(blk.output) + s.nWritten += int64(len(blk.output)) + }() + }(s.current) + return nil +} + +// ReadFrom reads data from r until EOF or error. +// The return value n is the number of bytes read. +// Any error except io.EOF encountered during the read is also returned. +// +// The Copy function uses ReaderFrom if available. +func (e *Encoder) ReadFrom(r io.Reader) (n int64, err error) { + if debugEncoder { + println("Using ReadFrom") + } + + // Flush any current writes. + if len(e.state.filling) > 0 { + if err := e.nextBlock(false); err != nil { + return 0, err + } + } + e.state.filling = e.state.filling[:e.o.blockSize] + src := e.state.filling + for { + n2, err := r.Read(src) + if e.o.crc { + _, _ = e.state.encoder.CRC().Write(src[:n2]) + } + // src is now the unfilled part... + src = src[n2:] + n += int64(n2) + switch err { + case io.EOF: + e.state.filling = e.state.filling[:len(e.state.filling)-len(src)] + if debugEncoder { + println("ReadFrom: got EOF final block:", len(e.state.filling)) + } + return n, nil + case nil: + default: + if debugEncoder { + println("ReadFrom: got error:", err) + } + e.state.err = err + return n, err + } + if len(src) > 0 { + if debugEncoder { + println("ReadFrom: got space left in source:", len(src)) + } + continue + } + err = e.nextBlock(false) + if err != nil { + return n, err + } + e.state.filling = e.state.filling[:e.o.blockSize] + src = e.state.filling + } +} + +// Flush will send the currently written data to output +// and block until everything has been written. +// This should only be used on rare occasions where pushing the currently queued data is critical. +func (e *Encoder) Flush() error { + s := &e.state + if len(s.filling) > 0 { + err := e.nextBlock(false) + if err != nil { + // Ignore Flush after Close. + if errors.Is(s.err, ErrEncoderClosed) { + return nil + } + return err + } + } + s.wg.Wait() + s.wWg.Wait() + if s.err != nil { + // Ignore Flush after Close. + if errors.Is(s.err, ErrEncoderClosed) { + return nil + } + return s.err + } + return s.writeErr +} + +// Close will flush the final output and close the stream. +// The function will block until everything has been written. +// The Encoder can still be re-used after calling this. +func (e *Encoder) Close() error { + s := &e.state + if s.encoder == nil { + return nil + } + err := e.nextBlock(true) + if err != nil { + if errors.Is(s.err, ErrEncoderClosed) { + return nil + } + return err + } + if s.frameContentSize > 0 { + if s.nInput != s.frameContentSize { + return fmt.Errorf("frame content size %d given, but %d bytes was written", s.frameContentSize, s.nInput) + } + } + if e.state.fullFrameWritten { + return s.err + } + s.wg.Wait() + s.wWg.Wait() + + if s.err != nil { + return s.err + } + if s.writeErr != nil { + return s.writeErr + } + + // Write CRC + if e.o.crc && s.err == nil { + // heap alloc. + var tmp [4]byte + _, s.err = s.w.Write(s.encoder.AppendCRC(tmp[:0])) + s.nWritten += 4 + } + + // Add padding with content from crypto/rand.Reader + if s.err == nil && e.o.pad > 0 { + add := calcSkippableFrame(s.nWritten, int64(e.o.pad)) + frame, err := skippableFrame(s.filling[:0], add, rand.Reader) + if err != nil { + return err + } + _, s.err = s.w.Write(frame) + } + if s.err == nil { + s.err = ErrEncoderClosed + return nil + } + + return s.err +} + +// EncodeAll will encode all input in src and append it to dst. +// This function can be called concurrently, but each call will only run on a single goroutine. +// If empty input is given, nothing is returned, unless WithZeroFrames is specified. +// Encoded blocks can be concatenated and the result will be the combined input stream. +// Data compressed with EncodeAll can be decoded with the Decoder, +// using either a stream or DecodeAll. +func (e *Encoder) EncodeAll(src, dst []byte) []byte { + e.init.Do(e.initialize) + enc := <-e.encoders + defer func() { + e.encoders <- enc + }() + return e.encodeAll(enc, src, dst) +} + +func (e *Encoder) encodeAll(enc encoder, src, dst []byte) []byte { + if len(src) == 0 { + if e.o.fullZero { + // Add frame header. + fh := frameHeader{ + ContentSize: 0, + WindowSize: MinWindowSize, + SingleSegment: true, + // Adding a checksum would be a waste of space. + Checksum: false, + DictID: 0, + } + dst = fh.appendTo(dst) + + // Write raw block as last one only. + var blk blockHeader + blk.setSize(0) + blk.setType(blockTypeRaw) + blk.setLast(true) + dst = blk.appendTo(dst) + } + return dst + } + + // Use single segments when above minimum window and below window size. + single := len(src) <= e.o.windowSize && len(src) > MinWindowSize + if e.o.single != nil { + single = *e.o.single + } + fh := frameHeader{ + ContentSize: uint64(len(src)), + WindowSize: uint32(enc.WindowSize(int64(len(src)))), + SingleSegment: single, + Checksum: e.o.crc, + DictID: e.o.dict.ID(), + } + + // If less than 1MB, allocate a buffer up front. + if len(dst) == 0 && cap(dst) == 0 && len(src) < 1<<20 && !e.o.lowMem { + dst = make([]byte, 0, len(src)) + } + dst = fh.appendTo(dst) + + // If we can do everything in one block, prefer that. + if len(src) <= e.o.blockSize { + enc.Reset(e.o.dict, true) + // Slightly faster with no history and everything in one block. + if e.o.crc { + _, _ = enc.CRC().Write(src) + } + blk := enc.Block() + blk.last = true + if e.o.dict == nil { + enc.EncodeNoHist(blk, src) + } else { + enc.Encode(blk, src) + } + + // If we got the exact same number of literals as input, + // assume the literals cannot be compressed. + oldout := blk.output + // Output directly to dst + blk.output = dst + + err := blk.encode(src, e.o.noEntropy, !e.o.allLitEntropy) + if err != nil { + panic(err) + } + dst = blk.output + blk.output = oldout + } else { + enc.Reset(e.o.dict, false) + blk := enc.Block() + for len(src) > 0 { + todo := src + if len(todo) > e.o.blockSize { + todo = todo[:e.o.blockSize] + } + src = src[len(todo):] + if e.o.crc { + _, _ = enc.CRC().Write(todo) + } + blk.pushOffsets() + enc.Encode(blk, todo) + if len(src) == 0 { + blk.last = true + } + err := blk.encode(todo, e.o.noEntropy, !e.o.allLitEntropy) + if err != nil { + panic(err) + } + dst = append(dst, blk.output...) + blk.reset(nil) + } + } + if e.o.crc { + dst = enc.AppendCRC(dst) + } + // Add padding with content from crypto/rand.Reader + if e.o.pad > 0 { + add := calcSkippableFrame(int64(len(dst)), int64(e.o.pad)) + var err error + dst, err = skippableFrame(dst, add, rand.Reader) + if err != nil { + panic(err) + } + } + return dst +} + +// MaxEncodedSize returns the expected maximum +// size of an encoded block or stream. +func (e *Encoder) MaxEncodedSize(size int) int { + frameHeader := 4 + 2 // magic + frame header & window descriptor + if e.o.dict != nil { + frameHeader += 4 + } + // Frame content size: + if size < 256 { + frameHeader++ + } else if size < 65536+256 { + frameHeader += 2 + } else if size < math.MaxInt32 { + frameHeader += 4 + } else { + frameHeader += 8 + } + // Final crc + if e.o.crc { + frameHeader += 4 + } + + // Max overhead is 3 bytes/block. + // There cannot be 0 blocks. + blocks := (size + e.o.blockSize) / e.o.blockSize + + // Combine, add padding. + maxSz := frameHeader + 3*blocks + size + if e.o.pad > 1 { + maxSz += calcSkippableFrame(int64(maxSz), int64(e.o.pad)) + } + return maxSz +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/encoder_options.go b/backend/vendor/github.com/klauspost/compress/zstd/encoder_options.go new file mode 100644 index 0000000..20671dc --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/encoder_options.go @@ -0,0 +1,339 @@ +package zstd + +import ( + "errors" + "fmt" + "math" + "math/bits" + "runtime" + "strings" +) + +// EOption is an option for creating a encoder. +type EOption func(*encoderOptions) error + +// options retains accumulated state of multiple options. +type encoderOptions struct { + concurrent int + level EncoderLevel + single *bool + pad int + blockSize int + windowSize int + crc bool + fullZero bool + noEntropy bool + allLitEntropy bool + customWindow bool + customALEntropy bool + customBlockSize bool + lowMem bool + dict *dict +} + +func (o *encoderOptions) setDefault() { + *o = encoderOptions{ + concurrent: runtime.GOMAXPROCS(0), + crc: true, + single: nil, + blockSize: maxCompressedBlockSize, + windowSize: 8 << 20, + level: SpeedDefault, + allLitEntropy: false, + lowMem: false, + } +} + +// encoder returns an encoder with the selected options. +func (o encoderOptions) encoder() encoder { + switch o.level { + case SpeedFastest: + if o.dict != nil { + return &fastEncoderDict{fastEncoder: fastEncoder{fastBase: fastBase{maxMatchOff: int32(o.windowSize), bufferReset: math.MaxInt32 - int32(o.windowSize*2), lowMem: o.lowMem}}} + } + return &fastEncoder{fastBase: fastBase{maxMatchOff: int32(o.windowSize), bufferReset: math.MaxInt32 - int32(o.windowSize*2), lowMem: o.lowMem}} + + case SpeedDefault: + if o.dict != nil { + return &doubleFastEncoderDict{fastEncoderDict: fastEncoderDict{fastEncoder: fastEncoder{fastBase: fastBase{maxMatchOff: int32(o.windowSize), bufferReset: math.MaxInt32 - int32(o.windowSize*2), lowMem: o.lowMem}}}} + } + return &doubleFastEncoder{fastEncoder: fastEncoder{fastBase: fastBase{maxMatchOff: int32(o.windowSize), bufferReset: math.MaxInt32 - int32(o.windowSize*2), lowMem: o.lowMem}}} + case SpeedBetterCompression: + if o.dict != nil { + return &betterFastEncoderDict{betterFastEncoder: betterFastEncoder{fastBase: fastBase{maxMatchOff: int32(o.windowSize), bufferReset: math.MaxInt32 - int32(o.windowSize*2), lowMem: o.lowMem}}} + } + return &betterFastEncoder{fastBase: fastBase{maxMatchOff: int32(o.windowSize), bufferReset: math.MaxInt32 - int32(o.windowSize*2), lowMem: o.lowMem}} + case SpeedBestCompression: + return &bestFastEncoder{fastBase: fastBase{maxMatchOff: int32(o.windowSize), bufferReset: math.MaxInt32 - int32(o.windowSize*2), lowMem: o.lowMem}} + } + panic("unknown compression level") +} + +// WithEncoderCRC will add CRC value to output. +// Output will be 4 bytes larger. +func WithEncoderCRC(b bool) EOption { + return func(o *encoderOptions) error { o.crc = b; return nil } +} + +// WithEncoderConcurrency will set the concurrency, +// meaning the maximum number of encoders to run concurrently. +// The value supplied must be at least 1. +// For streams, setting a value of 1 will disable async compression. +// By default this will be set to GOMAXPROCS. +func WithEncoderConcurrency(n int) EOption { + return func(o *encoderOptions) error { + if n <= 0 { + return fmt.Errorf("concurrency must be at least 1") + } + o.concurrent = n + return nil + } +} + +// WithWindowSize will set the maximum allowed back-reference distance. +// The value must be a power of two between MinWindowSize and MaxWindowSize. +// A larger value will enable better compression but allocate more memory and, +// for above-default values, take considerably longer. +// The default value is determined by the compression level and max 8MB. +func WithWindowSize(n int) EOption { + return func(o *encoderOptions) error { + switch { + case n < MinWindowSize: + return fmt.Errorf("window size must be at least %d", MinWindowSize) + case n > MaxWindowSize: + return fmt.Errorf("window size must be at most %d", MaxWindowSize) + case (n & (n - 1)) != 0: + return errors.New("window size must be a power of 2") + } + + o.windowSize = n + o.customWindow = true + if o.blockSize > o.windowSize { + o.blockSize = o.windowSize + o.customBlockSize = true + } + return nil + } +} + +// WithEncoderPadding will add padding to all output so the size will be a multiple of n. +// This can be used to obfuscate the exact output size or make blocks of a certain size. +// The contents will be a skippable frame, so it will be invisible by the decoder. +// n must be > 0 and <= 1GB, 1<<30 bytes. +// The padded area will be filled with data from crypto/rand.Reader. +// If `EncodeAll` is used with data already in the destination, the total size will be multiple of this. +func WithEncoderPadding(n int) EOption { + return func(o *encoderOptions) error { + if n <= 0 { + return fmt.Errorf("padding must be at least 1") + } + // No need to waste our time. + if n == 1 { + n = 0 + } + if n > 1<<30 { + return fmt.Errorf("padding must less than 1GB (1<<30 bytes) ") + } + o.pad = n + return nil + } +} + +// EncoderLevel predefines encoder compression levels. +// Only use the constants made available, since the actual mapping +// of these values are very likely to change and your compression could change +// unpredictably when upgrading the library. +type EncoderLevel int + +const ( + speedNotSet EncoderLevel = iota + + // SpeedFastest will choose the fastest reasonable compression. + // This is roughly equivalent to the fastest Zstandard mode. + SpeedFastest + + // SpeedDefault is the default "pretty fast" compression option. + // This is roughly equivalent to the default Zstandard mode (level 3). + SpeedDefault + + // SpeedBetterCompression will yield better compression than the default. + // Currently it is about zstd level 7-8 with ~ 2x-3x the default CPU usage. + // By using this, notice that CPU usage may go up in the future. + SpeedBetterCompression + + // SpeedBestCompression will choose the best available compression option. + // This will offer the best compression no matter the CPU cost. + SpeedBestCompression + + // speedLast should be kept as the last actual compression option. + // The is not for external usage, but is used to keep track of the valid options. + speedLast +) + +// EncoderLevelFromString will convert a string representation of an encoding level back +// to a compression level. The compare is not case sensitive. +// If the string wasn't recognized, (false, SpeedDefault) will be returned. +func EncoderLevelFromString(s string) (bool, EncoderLevel) { + for l := speedNotSet + 1; l < speedLast; l++ { + if strings.EqualFold(s, l.String()) { + return true, l + } + } + return false, SpeedDefault +} + +// EncoderLevelFromZstd will return an encoder level that closest matches the compression +// ratio of a specific zstd compression level. +// Many input values will provide the same compression level. +func EncoderLevelFromZstd(level int) EncoderLevel { + switch { + case level < 3: + return SpeedFastest + case level >= 3 && level < 6: + return SpeedDefault + case level >= 6 && level < 10: + return SpeedBetterCompression + default: + return SpeedBestCompression + } +} + +// String provides a string representation of the compression level. +func (e EncoderLevel) String() string { + switch e { + case SpeedFastest: + return "fastest" + case SpeedDefault: + return "default" + case SpeedBetterCompression: + return "better" + case SpeedBestCompression: + return "best" + default: + return "invalid" + } +} + +// WithEncoderLevel specifies a predefined compression level. +func WithEncoderLevel(l EncoderLevel) EOption { + return func(o *encoderOptions) error { + switch { + case l <= speedNotSet || l >= speedLast: + return fmt.Errorf("unknown encoder level") + } + o.level = l + if !o.customWindow { + switch o.level { + case SpeedFastest: + o.windowSize = 4 << 20 + if !o.customBlockSize { + o.blockSize = 1 << 16 + } + case SpeedDefault: + o.windowSize = 8 << 20 + case SpeedBetterCompression: + o.windowSize = 8 << 20 + case SpeedBestCompression: + o.windowSize = 8 << 20 + } + } + if !o.customALEntropy { + o.allLitEntropy = l > SpeedDefault + } + + return nil + } +} + +// WithZeroFrames will encode 0 length input as full frames. +// This can be needed for compatibility with zstandard usage, +// but is not needed for this package. +func WithZeroFrames(b bool) EOption { + return func(o *encoderOptions) error { + o.fullZero = b + return nil + } +} + +// WithAllLitEntropyCompression will apply entropy compression if no matches are found. +// Disabling this will skip incompressible data faster, but in cases with no matches but +// skewed character distribution compression is lost. +// Default value depends on the compression level selected. +func WithAllLitEntropyCompression(b bool) EOption { + return func(o *encoderOptions) error { + o.customALEntropy = true + o.allLitEntropy = b + return nil + } +} + +// WithNoEntropyCompression will always skip entropy compression of literals. +// This can be useful if content has matches, but unlikely to benefit from entropy +// compression. Usually the slight speed improvement is not worth enabling this. +func WithNoEntropyCompression(b bool) EOption { + return func(o *encoderOptions) error { + o.noEntropy = b + return nil + } +} + +// WithSingleSegment will set the "single segment" flag when EncodeAll is used. +// If this flag is set, data must be regenerated within a single continuous memory segment. +// In this case, Window_Descriptor byte is skipped, but Frame_Content_Size is necessarily present. +// As a consequence, the decoder must allocate a memory segment of size equal or larger than size of your content. +// In order to preserve the decoder from unreasonable memory requirements, +// a decoder is allowed to reject a compressed frame which requests a memory size beyond decoder's authorized range. +// For broader compatibility, decoders are recommended to support memory sizes of at least 8 MB. +// This is only a recommendation, each decoder is free to support higher or lower limits, depending on local limitations. +// If this is not specified, block encodes will automatically choose this based on the input size and the window size. +// This setting has no effect on streamed encodes. +func WithSingleSegment(b bool) EOption { + return func(o *encoderOptions) error { + o.single = &b + return nil + } +} + +// WithLowerEncoderMem will trade in some memory cases trade less memory usage for +// slower encoding speed. +// This will not change the window size which is the primary function for reducing +// memory usage. See WithWindowSize. +func WithLowerEncoderMem(b bool) EOption { + return func(o *encoderOptions) error { + o.lowMem = b + return nil + } +} + +// WithEncoderDict allows to register a dictionary that will be used for the encode. +// +// The slice dict must be in the [dictionary format] produced by +// "zstd --train" from the Zstandard reference implementation. +// +// The encoder *may* choose to use no dictionary instead for certain payloads. +// +// [dictionary format]: https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#dictionary-format +func WithEncoderDict(dict []byte) EOption { + return func(o *encoderOptions) error { + d, err := loadDict(dict) + if err != nil { + return err + } + o.dict = d + return nil + } +} + +// WithEncoderDictRaw registers a dictionary that may be used by the encoder. +// +// The slice content may contain arbitrary data. It will be used as an initial +// history. +func WithEncoderDictRaw(id uint32, content []byte) EOption { + return func(o *encoderOptions) error { + if bits.UintSize > 32 && uint(len(content)) > dictMaxLength { + return fmt.Errorf("dictionary of size %d > 2GiB too large", len(content)) + } + o.dict = &dict{id: id, content: content, offsets: [3]int{1, 4, 8}} + return nil + } +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/framedec.go b/backend/vendor/github.com/klauspost/compress/zstd/framedec.go new file mode 100644 index 0000000..d88f067 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/framedec.go @@ -0,0 +1,412 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "encoding/binary" + "encoding/hex" + "errors" + "io" + + "github.com/klauspost/compress/zstd/internal/xxhash" +) + +type frameDec struct { + o decoderOptions + crc *xxhash.Digest + + WindowSize uint64 + + // Frame history passed between blocks + history history + + rawInput byteBuffer + + // Byte buffer that can be reused for small input blocks. + bBuf byteBuf + + FrameContentSize uint64 + + DictionaryID uint32 + HasCheckSum bool + SingleSegment bool +} + +const ( + // MinWindowSize is the minimum Window Size, which is 1 KB. + MinWindowSize = 1 << 10 + + // MaxWindowSize is the maximum encoder window size + // and the default decoder maximum window size. + MaxWindowSize = 1 << 29 +) + +const ( + frameMagic = "\x28\xb5\x2f\xfd" + skippableFrameMagic = "\x2a\x4d\x18" +) + +func newFrameDec(o decoderOptions) *frameDec { + if o.maxWindowSize > o.maxDecodedSize { + o.maxWindowSize = o.maxDecodedSize + } + d := frameDec{ + o: o, + } + return &d +} + +// reset will read the frame header and prepare for block decoding. +// If nothing can be read from the input, io.EOF will be returned. +// Any other error indicated that the stream contained data, but +// there was a problem. +func (d *frameDec) reset(br byteBuffer) error { + d.HasCheckSum = false + d.WindowSize = 0 + var signature [4]byte + for { + var err error + // Check if we can read more... + b, err := br.readSmall(1) + switch err { + case io.EOF, io.ErrUnexpectedEOF: + return io.EOF + case nil: + signature[0] = b[0] + default: + return err + } + // Read the rest, don't allow io.ErrUnexpectedEOF + b, err = br.readSmall(3) + switch err { + case io.EOF: + return io.EOF + case nil: + copy(signature[1:], b) + default: + return err + } + + if string(signature[1:4]) != skippableFrameMagic || signature[0]&0xf0 != 0x50 { + if debugDecoder { + println("Not skippable", hex.EncodeToString(signature[:]), hex.EncodeToString([]byte(skippableFrameMagic))) + } + // Break if not skippable frame. + break + } + // Read size to skip + b, err = br.readSmall(4) + if err != nil { + if debugDecoder { + println("Reading Frame Size", err) + } + return err + } + n := uint32(b[0]) | (uint32(b[1]) << 8) | (uint32(b[2]) << 16) | (uint32(b[3]) << 24) + println("Skipping frame with", n, "bytes.") + err = br.skipN(int64(n)) + if err != nil { + if debugDecoder { + println("Reading discarded frame", err) + } + return err + } + } + if string(signature[:]) != frameMagic { + if debugDecoder { + println("Got magic numbers: ", signature, "want:", []byte(frameMagic)) + } + return ErrMagicMismatch + } + + // Read Frame_Header_Descriptor + fhd, err := br.readByte() + if err != nil { + if debugDecoder { + println("Reading Frame_Header_Descriptor", err) + } + return err + } + d.SingleSegment = fhd&(1<<5) != 0 + + if fhd&(1<<3) != 0 { + return errors.New("reserved bit set on frame header") + } + + // Read Window_Descriptor + // https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#window_descriptor + d.WindowSize = 0 + if !d.SingleSegment { + wd, err := br.readByte() + if err != nil { + if debugDecoder { + println("Reading Window_Descriptor", err) + } + return err + } + if debugDecoder { + printf("raw: %x, mantissa: %d, exponent: %d\n", wd, wd&7, wd>>3) + } + windowLog := 10 + (wd >> 3) + windowBase := uint64(1) << windowLog + windowAdd := (windowBase / 8) * uint64(wd&0x7) + d.WindowSize = windowBase + windowAdd + } + + // Read Dictionary_ID + // https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#dictionary_id + d.DictionaryID = 0 + if size := fhd & 3; size != 0 { + if size == 3 { + size = 4 + } + + b, err := br.readSmall(int(size)) + if err != nil { + println("Reading Dictionary_ID", err) + return err + } + var id uint32 + switch len(b) { + case 1: + id = uint32(b[0]) + case 2: + id = uint32(b[0]) | (uint32(b[1]) << 8) + case 4: + id = uint32(b[0]) | (uint32(b[1]) << 8) | (uint32(b[2]) << 16) | (uint32(b[3]) << 24) + } + if debugDecoder { + println("Dict size", size, "ID:", id) + } + d.DictionaryID = id + } + + // Read Frame_Content_Size + // https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#frame_content_size + var fcsSize int + v := fhd >> 6 + switch v { + case 0: + if d.SingleSegment { + fcsSize = 1 + } + default: + fcsSize = 1 << v + } + d.FrameContentSize = fcsUnknown + if fcsSize > 0 { + b, err := br.readSmall(fcsSize) + if err != nil { + println("Reading Frame content", err) + return err + } + switch len(b) { + case 1: + d.FrameContentSize = uint64(b[0]) + case 2: + // When FCS_Field_Size is 2, the offset of 256 is added. + d.FrameContentSize = uint64(b[0]) | (uint64(b[1]) << 8) + 256 + case 4: + d.FrameContentSize = uint64(b[0]) | (uint64(b[1]) << 8) | (uint64(b[2]) << 16) | (uint64(b[3]) << 24) + case 8: + d1 := uint32(b[0]) | (uint32(b[1]) << 8) | (uint32(b[2]) << 16) | (uint32(b[3]) << 24) + d2 := uint32(b[4]) | (uint32(b[5]) << 8) | (uint32(b[6]) << 16) | (uint32(b[7]) << 24) + d.FrameContentSize = uint64(d1) | (uint64(d2) << 32) + } + if debugDecoder { + println("Read FCS:", d.FrameContentSize) + } + } + + // Move this to shared. + d.HasCheckSum = fhd&(1<<2) != 0 + if d.HasCheckSum { + if d.crc == nil { + d.crc = xxhash.New() + } + d.crc.Reset() + } + + if d.WindowSize > d.o.maxWindowSize { + if debugDecoder { + printf("window size %d > max %d\n", d.WindowSize, d.o.maxWindowSize) + } + return ErrWindowSizeExceeded + } + + if d.WindowSize == 0 && d.SingleSegment { + // We may not need window in this case. + d.WindowSize = max(d.FrameContentSize, MinWindowSize) + if d.WindowSize > d.o.maxDecodedSize { + if debugDecoder { + printf("window size %d > max %d\n", d.WindowSize, d.o.maxWindowSize) + } + return ErrDecoderSizeExceeded + } + } + + // The minimum Window_Size is 1 KB. + if d.WindowSize < MinWindowSize { + if debugDecoder { + println("got window size: ", d.WindowSize) + } + return ErrWindowSizeTooSmall + } + d.history.windowSize = int(d.WindowSize) + if !d.o.lowMem || d.history.windowSize < maxBlockSize { + // Alloc 2x window size if not low-mem, or window size below 2MB. + d.history.allocFrameBuffer = d.history.windowSize * 2 + } else { + if d.o.lowMem { + // Alloc with 1MB extra. + d.history.allocFrameBuffer = d.history.windowSize + maxBlockSize/2 + } else { + // Alloc with 2MB extra. + d.history.allocFrameBuffer = d.history.windowSize + maxBlockSize + } + } + + if debugDecoder { + println("Frame: Dict:", d.DictionaryID, "FrameContentSize:", d.FrameContentSize, "singleseg:", d.SingleSegment, "window:", d.WindowSize, "crc:", d.HasCheckSum) + } + + // history contains input - maybe we do something + d.rawInput = br + return nil +} + +// next will start decoding the next block from stream. +func (d *frameDec) next(block *blockDec) error { + if debugDecoder { + println("decoding new block") + } + err := block.reset(d.rawInput, d.WindowSize) + if err != nil { + println("block error:", err) + // Signal the frame decoder we have a problem. + block.sendErr(err) + return err + } + return nil +} + +// checkCRC will check the checksum, assuming the frame has one. +// Will return ErrCRCMismatch if crc check failed, otherwise nil. +func (d *frameDec) checkCRC() error { + // We can overwrite upper tmp now + buf, err := d.rawInput.readSmall(4) + if err != nil { + println("CRC missing?", err) + return err + } + + want := binary.LittleEndian.Uint32(buf[:4]) + got := uint32(d.crc.Sum64()) + + if got != want { + if debugDecoder { + printf("CRC check failed: got %08x, want %08x\n", got, want) + } + return ErrCRCMismatch + } + if debugDecoder { + printf("CRC ok %08x\n", got) + } + return nil +} + +// consumeCRC skips over the checksum, assuming the frame has one. +func (d *frameDec) consumeCRC() error { + _, err := d.rawInput.readSmall(4) + if err != nil { + println("CRC missing?", err) + } + return err +} + +// runDecoder will run the decoder for the remainder of the frame. +func (d *frameDec) runDecoder(dst []byte, dec *blockDec) ([]byte, error) { + saved := d.history.b + + // We use the history for output to avoid copying it. + d.history.b = dst + d.history.ignoreBuffer = len(dst) + // Store input length, so we only check new data. + crcStart := len(dst) + d.history.decoders.maxSyncLen = 0 + if d.o.limitToCap { + d.history.decoders.maxSyncLen = uint64(cap(dst) - len(dst)) + } + if d.FrameContentSize != fcsUnknown { + if !d.o.limitToCap || d.FrameContentSize+uint64(len(dst)) < d.history.decoders.maxSyncLen { + d.history.decoders.maxSyncLen = d.FrameContentSize + uint64(len(dst)) + } + if d.history.decoders.maxSyncLen > d.o.maxDecodedSize { + if debugDecoder { + println("maxSyncLen:", d.history.decoders.maxSyncLen, "> maxDecodedSize:", d.o.maxDecodedSize) + } + return dst, ErrDecoderSizeExceeded + } + if debugDecoder { + println("maxSyncLen:", d.history.decoders.maxSyncLen) + } + if !d.o.limitToCap && uint64(cap(dst)) < d.history.decoders.maxSyncLen { + // Alloc for output + dst2 := make([]byte, len(dst), d.history.decoders.maxSyncLen+compressedBlockOverAlloc) + copy(dst2, dst) + dst = dst2 + } + } + var err error + for { + err = dec.reset(d.rawInput, d.WindowSize) + if err != nil { + break + } + if debugDecoder { + println("next block:", dec) + } + err = dec.decodeBuf(&d.history) + if err != nil { + break + } + if uint64(len(d.history.b)-crcStart) > d.o.maxDecodedSize { + println("runDecoder: maxDecodedSize exceeded", uint64(len(d.history.b)-crcStart), ">", d.o.maxDecodedSize) + err = ErrDecoderSizeExceeded + break + } + if d.o.limitToCap && len(d.history.b) > cap(dst) { + println("runDecoder: cap exceeded", uint64(len(d.history.b)), ">", cap(dst)) + err = ErrDecoderSizeExceeded + break + } + if uint64(len(d.history.b)-crcStart) > d.FrameContentSize { + println("runDecoder: FrameContentSize exceeded", uint64(len(d.history.b)-crcStart), ">", d.FrameContentSize) + err = ErrFrameSizeExceeded + break + } + if dec.Last { + break + } + if debugDecoder { + println("runDecoder: FrameContentSize", uint64(len(d.history.b)-crcStart), "<=", d.FrameContentSize) + } + } + dst = d.history.b + if err == nil { + if d.FrameContentSize != fcsUnknown && uint64(len(d.history.b)-crcStart) != d.FrameContentSize { + err = ErrFrameSizeMismatch + } else if d.HasCheckSum { + if d.o.ignoreChecksum { + err = d.consumeCRC() + } else { + d.crc.Write(dst[crcStart:]) + err = d.checkCRC() + } + } + } + d.history.b = saved + return dst, err +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/frameenc.go b/backend/vendor/github.com/klauspost/compress/zstd/frameenc.go new file mode 100644 index 0000000..667ca06 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/frameenc.go @@ -0,0 +1,137 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "encoding/binary" + "fmt" + "io" + "math" + "math/bits" +) + +type frameHeader struct { + ContentSize uint64 + WindowSize uint32 + SingleSegment bool + Checksum bool + DictID uint32 +} + +const maxHeaderSize = 14 + +func (f frameHeader) appendTo(dst []byte) []byte { + dst = append(dst, frameMagic...) + var fhd uint8 + if f.Checksum { + fhd |= 1 << 2 + } + if f.SingleSegment { + fhd |= 1 << 5 + } + + var dictIDContent []byte + if f.DictID > 0 { + var tmp [4]byte + if f.DictID < 256 { + fhd |= 1 + tmp[0] = uint8(f.DictID) + dictIDContent = tmp[:1] + } else if f.DictID < 1<<16 { + fhd |= 2 + binary.LittleEndian.PutUint16(tmp[:2], uint16(f.DictID)) + dictIDContent = tmp[:2] + } else { + fhd |= 3 + binary.LittleEndian.PutUint32(tmp[:4], f.DictID) + dictIDContent = tmp[:4] + } + } + var fcs uint8 + if f.ContentSize >= 256 { + fcs++ + } + if f.ContentSize >= 65536+256 { + fcs++ + } + if f.ContentSize >= 0xffffffff { + fcs++ + } + + fhd |= fcs << 6 + + dst = append(dst, fhd) + if !f.SingleSegment { + const winLogMin = 10 + windowLog := (bits.Len32(f.WindowSize-1) - winLogMin) << 3 + dst = append(dst, uint8(windowLog)) + } + if f.DictID > 0 { + dst = append(dst, dictIDContent...) + } + switch fcs { + case 0: + if f.SingleSegment { + dst = append(dst, uint8(f.ContentSize)) + } + // Unless SingleSegment is set, framessizes < 256 are not stored. + case 1: + f.ContentSize -= 256 + dst = append(dst, uint8(f.ContentSize), uint8(f.ContentSize>>8)) + case 2: + dst = append(dst, uint8(f.ContentSize), uint8(f.ContentSize>>8), uint8(f.ContentSize>>16), uint8(f.ContentSize>>24)) + case 3: + dst = append(dst, uint8(f.ContentSize), uint8(f.ContentSize>>8), uint8(f.ContentSize>>16), uint8(f.ContentSize>>24), + uint8(f.ContentSize>>32), uint8(f.ContentSize>>40), uint8(f.ContentSize>>48), uint8(f.ContentSize>>56)) + default: + panic("invalid fcs") + } + return dst +} + +const skippableFrameHeader = 4 + 4 + +// calcSkippableFrame will return a total size to be added for written +// to be divisible by multiple. +// The value will always be > skippableFrameHeader. +// The function will panic if written < 0 or wantMultiple <= 0. +func calcSkippableFrame(written, wantMultiple int64) int { + if wantMultiple <= 0 { + panic("wantMultiple <= 0") + } + if written < 0 { + panic("written < 0") + } + leftOver := written % wantMultiple + if leftOver == 0 { + return 0 + } + toAdd := wantMultiple - leftOver + for toAdd < skippableFrameHeader { + toAdd += wantMultiple + } + return int(toAdd) +} + +// skippableFrame will add a skippable frame with a total size of bytes. +// total should be >= skippableFrameHeader and < math.MaxUint32. +func skippableFrame(dst []byte, total int, r io.Reader) ([]byte, error) { + if total == 0 { + return dst, nil + } + if total < skippableFrameHeader { + return dst, fmt.Errorf("requested skippable frame (%d) < 8", total) + } + if int64(total) > math.MaxUint32 { + return dst, fmt.Errorf("requested skippable frame (%d) > max uint32", total) + } + dst = append(dst, 0x50, 0x2a, 0x4d, 0x18) + f := uint32(total - skippableFrameHeader) + dst = append(dst, uint8(f), uint8(f>>8), uint8(f>>16), uint8(f>>24)) + start := len(dst) + dst = append(dst, make([]byte, f)...) + _, err := io.ReadFull(r, dst[start:]) + return dst, err +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/fse_decoder.go b/backend/vendor/github.com/klauspost/compress/zstd/fse_decoder.go new file mode 100644 index 0000000..2f8860a --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/fse_decoder.go @@ -0,0 +1,307 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "encoding/binary" + "errors" + "fmt" + "io" +) + +const ( + tablelogAbsoluteMax = 9 +) + +const ( + /*!MEMORY_USAGE : + * Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.) + * Increasing memory usage improves compression ratio + * Reduced memory usage can improve speed, due to cache effect + * Recommended max value is 14, for 16KB, which nicely fits into Intel x86 L1 cache */ + maxMemoryUsage = tablelogAbsoluteMax + 2 + + maxTableLog = maxMemoryUsage - 2 + maxTablesize = 1 << maxTableLog + maxTableMask = (1 << maxTableLog) - 1 + minTablelog = 5 + maxSymbolValue = 255 +) + +// fseDecoder provides temporary storage for compression and decompression. +type fseDecoder struct { + dt [maxTablesize]decSymbol // Decompression table. + symbolLen uint16 // Length of active part of the symbol table. + actualTableLog uint8 // Selected tablelog. + maxBits uint8 // Maximum number of additional bits + + // used for table creation to avoid allocations. + stateTable [256]uint16 + norm [maxSymbolValue + 1]int16 + preDefined bool +} + +// tableStep returns the next table index. +func tableStep(tableSize uint32) uint32 { + return (tableSize >> 1) + (tableSize >> 3) + 3 +} + +// readNCount will read the symbol distribution so decoding tables can be constructed. +func (s *fseDecoder) readNCount(b *byteReader, maxSymbol uint16) error { + var ( + charnum uint16 + previous0 bool + ) + if b.remain() < 4 { + return errors.New("input too small") + } + bitStream := b.Uint32NC() + nbBits := uint((bitStream & 0xF) + minTablelog) // extract tableLog + if nbBits > tablelogAbsoluteMax { + println("Invalid tablelog:", nbBits) + return errors.New("tableLog too large") + } + bitStream >>= 4 + bitCount := uint(4) + + s.actualTableLog = uint8(nbBits) + remaining := int32((1 << nbBits) + 1) + threshold := int32(1 << nbBits) + gotTotal := int32(0) + nbBits++ + + for remaining > 1 && charnum <= maxSymbol { + if previous0 { + //println("prev0") + n0 := charnum + for (bitStream & 0xFFFF) == 0xFFFF { + //println("24 x 0") + n0 += 24 + if r := b.remain(); r > 5 { + b.advance(2) + // The check above should make sure we can read 32 bits + bitStream = b.Uint32NC() >> bitCount + } else { + // end of bit stream + bitStream >>= 16 + bitCount += 16 + } + } + //printf("bitstream: %d, 0b%b", bitStream&3, bitStream) + for (bitStream & 3) == 3 { + n0 += 3 + bitStream >>= 2 + bitCount += 2 + } + n0 += uint16(bitStream & 3) + bitCount += 2 + + if n0 > maxSymbolValue { + return errors.New("maxSymbolValue too small") + } + //println("inserting ", n0-charnum, "zeroes from idx", charnum, "ending before", n0) + for charnum < n0 { + s.norm[uint8(charnum)] = 0 + charnum++ + } + + if r := b.remain(); r >= 7 || r-int(bitCount>>3) >= 4 { + b.advance(bitCount >> 3) + bitCount &= 7 + // The check above should make sure we can read 32 bits + bitStream = b.Uint32NC() >> bitCount + } else { + bitStream >>= 2 + } + } + + max := (2*threshold - 1) - remaining + var count int32 + + if int32(bitStream)&(threshold-1) < max { + count = int32(bitStream) & (threshold - 1) + if debugAsserts && nbBits < 1 { + panic("nbBits underflow") + } + bitCount += nbBits - 1 + } else { + count = int32(bitStream) & (2*threshold - 1) + if count >= threshold { + count -= max + } + bitCount += nbBits + } + + // extra accuracy + count-- + if count < 0 { + // -1 means +1 + remaining += count + gotTotal -= count + } else { + remaining -= count + gotTotal += count + } + s.norm[charnum&0xff] = int16(count) + charnum++ + previous0 = count == 0 + for remaining < threshold { + nbBits-- + threshold >>= 1 + } + + if r := b.remain(); r >= 7 || r-int(bitCount>>3) >= 4 { + b.advance(bitCount >> 3) + bitCount &= 7 + // The check above should make sure we can read 32 bits + bitStream = b.Uint32NC() >> (bitCount & 31) + } else { + bitCount -= (uint)(8 * (len(b.b) - 4 - b.off)) + b.off = len(b.b) - 4 + bitStream = b.Uint32() >> (bitCount & 31) + } + } + s.symbolLen = charnum + if s.symbolLen <= 1 { + return fmt.Errorf("symbolLen (%d) too small", s.symbolLen) + } + if s.symbolLen > maxSymbolValue+1 { + return fmt.Errorf("symbolLen (%d) too big", s.symbolLen) + } + if remaining != 1 { + return fmt.Errorf("corruption detected (remaining %d != 1)", remaining) + } + if bitCount > 32 { + return fmt.Errorf("corruption detected (bitCount %d > 32)", bitCount) + } + if gotTotal != 1<> 3) + return s.buildDtable() +} + +func (s *fseDecoder) mustReadFrom(r io.Reader) { + fatalErr := func(err error) { + if err != nil { + panic(err) + } + } + // dt [maxTablesize]decSymbol // Decompression table. + // symbolLen uint16 // Length of active part of the symbol table. + // actualTableLog uint8 // Selected tablelog. + // maxBits uint8 // Maximum number of additional bits + // // used for table creation to avoid allocations. + // stateTable [256]uint16 + // norm [maxSymbolValue + 1]int16 + // preDefined bool + fatalErr(binary.Read(r, binary.LittleEndian, &s.dt)) + fatalErr(binary.Read(r, binary.LittleEndian, &s.symbolLen)) + fatalErr(binary.Read(r, binary.LittleEndian, &s.actualTableLog)) + fatalErr(binary.Read(r, binary.LittleEndian, &s.maxBits)) + fatalErr(binary.Read(r, binary.LittleEndian, &s.stateTable)) + fatalErr(binary.Read(r, binary.LittleEndian, &s.norm)) + fatalErr(binary.Read(r, binary.LittleEndian, &s.preDefined)) +} + +// decSymbol contains information about a state entry, +// Including the state offset base, the output symbol and +// the number of bits to read for the low part of the destination state. +// Using a composite uint64 is faster than a struct with separate members. +type decSymbol uint64 + +func newDecSymbol(nbits, addBits uint8, newState uint16, baseline uint32) decSymbol { + return decSymbol(nbits) | (decSymbol(addBits) << 8) | (decSymbol(newState) << 16) | (decSymbol(baseline) << 32) +} + +func (d decSymbol) nbBits() uint8 { + return uint8(d) +} + +func (d decSymbol) addBits() uint8 { + return uint8(d >> 8) +} + +func (d decSymbol) newState() uint16 { + return uint16(d >> 16) +} + +func (d decSymbol) baselineInt() int { + return int(d >> 32) +} + +func (d *decSymbol) setNBits(nBits uint8) { + const mask = 0xffffffffffffff00 + *d = (*d & mask) | decSymbol(nBits) +} + +func (d *decSymbol) setAddBits(addBits uint8) { + const mask = 0xffffffffffff00ff + *d = (*d & mask) | (decSymbol(addBits) << 8) +} + +func (d *decSymbol) setNewState(state uint16) { + const mask = 0xffffffff0000ffff + *d = (*d & mask) | decSymbol(state)<<16 +} + +func (d *decSymbol) setExt(addBits uint8, baseline uint32) { + const mask = 0xffff00ff + *d = (*d & mask) | (decSymbol(addBits) << 8) | (decSymbol(baseline) << 32) +} + +// decSymbolValue returns the transformed decSymbol for the given symbol. +func decSymbolValue(symb uint8, t []baseOffset) (decSymbol, error) { + if int(symb) >= len(t) { + return 0, fmt.Errorf("rle symbol %d >= max %d", symb, len(t)) + } + lu := t[symb] + return newDecSymbol(0, lu.addBits, 0, lu.baseLine), nil +} + +// setRLE will set the decoder til RLE mode. +func (s *fseDecoder) setRLE(symbol decSymbol) { + s.actualTableLog = 0 + s.maxBits = symbol.addBits() + s.dt[0] = symbol +} + +// transform will transform the decoder table into a table usable for +// decoding without having to apply the transformation while decoding. +// The state will contain the base value and the number of bits to read. +func (s *fseDecoder) transform(t []baseOffset) error { + tableSize := uint16(1 << s.actualTableLog) + s.maxBits = 0 + for i, v := range s.dt[:tableSize] { + add := v.addBits() + if int(add) >= len(t) { + return fmt.Errorf("invalid decoding table entry %d, symbol %d >= max (%d)", i, v.addBits(), len(t)) + } + lu := t[add] + if lu.addBits > s.maxBits { + s.maxBits = lu.addBits + } + v.setExt(lu.addBits, lu.baseLine) + s.dt[i] = v + } + return nil +} + +type fseState struct { + dt []decSymbol + state decSymbol +} + +// Initialize and decodeAsync first state and symbol. +func (s *fseState) init(br *bitReader, tableLog uint8, dt []decSymbol) { + s.dt = dt + br.fill() + s.state = dt[br.getBits(tableLog)] +} + +// final returns the current state symbol without decoding the next. +func (s decSymbol) final() (int, uint8) { + return s.baselineInt(), s.addBits() +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/fse_decoder_amd64.go b/backend/vendor/github.com/klauspost/compress/zstd/fse_decoder_amd64.go new file mode 100644 index 0000000..d04a829 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/fse_decoder_amd64.go @@ -0,0 +1,65 @@ +//go:build amd64 && !appengine && !noasm && gc +// +build amd64,!appengine,!noasm,gc + +package zstd + +import ( + "fmt" +) + +type buildDtableAsmContext struct { + // inputs + stateTable *uint16 + norm *int16 + dt *uint64 + + // outputs --- set by the procedure in the case of error; + // for interpretation please see the error handling part below + errParam1 uint64 + errParam2 uint64 +} + +// buildDtable_asm is an x86 assembly implementation of fseDecoder.buildDtable. +// Function returns non-zero exit code on error. +// +//go:noescape +func buildDtable_asm(s *fseDecoder, ctx *buildDtableAsmContext) int + +// please keep in sync with _generate/gen_fse.go +const ( + errorCorruptedNormalizedCounter = 1 + errorNewStateTooBig = 2 + errorNewStateNoBits = 3 +) + +// buildDtable will build the decoding table. +func (s *fseDecoder) buildDtable() error { + ctx := buildDtableAsmContext{ + stateTable: &s.stateTable[0], + norm: &s.norm[0], + dt: (*uint64)(&s.dt[0]), + } + code := buildDtable_asm(s, &ctx) + + if code != 0 { + switch code { + case errorCorruptedNormalizedCounter: + position := ctx.errParam1 + return fmt.Errorf("corrupted input (position=%d, expected 0)", position) + + case errorNewStateTooBig: + newState := decSymbol(ctx.errParam1) + size := ctx.errParam2 + return fmt.Errorf("newState (%d) outside table size (%d)", newState, size) + + case errorNewStateNoBits: + newState := decSymbol(ctx.errParam1) + oldState := decSymbol(ctx.errParam2) + return fmt.Errorf("newState (%d) == oldState (%d) and no bits", newState, oldState) + + default: + return fmt.Errorf("buildDtable_asm returned unhandled nonzero code = %d", code) + } + } + return nil +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/fse_decoder_amd64.s b/backend/vendor/github.com/klauspost/compress/zstd/fse_decoder_amd64.s new file mode 100644 index 0000000..bcde398 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/fse_decoder_amd64.s @@ -0,0 +1,126 @@ +// Code generated by command: go run gen_fse.go -out ../fse_decoder_amd64.s -pkg=zstd. DO NOT EDIT. + +//go:build !appengine && !noasm && gc && !noasm + +// func buildDtable_asm(s *fseDecoder, ctx *buildDtableAsmContext) int +TEXT ·buildDtable_asm(SB), $0-24 + MOVQ ctx+8(FP), CX + MOVQ s+0(FP), DI + + // Load values + MOVBQZX 4098(DI), DX + XORQ AX, AX + BTSQ DX, AX + MOVQ (CX), BX + MOVQ 16(CX), SI + LEAQ -1(AX), R8 + MOVQ 8(CX), CX + MOVWQZX 4096(DI), DI + + // End load values + // Init, lay down lowprob symbols + XORQ R9, R9 + JMP init_main_loop_condition + +init_main_loop: + MOVWQSX (CX)(R9*2), R10 + CMPW R10, $-1 + JNE do_not_update_high_threshold + MOVB R9, 1(SI)(R8*8) + DECQ R8 + MOVQ $0x0000000000000001, R10 + +do_not_update_high_threshold: + MOVW R10, (BX)(R9*2) + INCQ R9 + +init_main_loop_condition: + CMPQ R9, DI + JL init_main_loop + + // Spread symbols + // Calculate table step + MOVQ AX, R9 + SHRQ $0x01, R9 + MOVQ AX, R10 + SHRQ $0x03, R10 + LEAQ 3(R9)(R10*1), R9 + + // Fill add bits values + LEAQ -1(AX), R10 + XORQ R11, R11 + XORQ R12, R12 + JMP spread_main_loop_condition + +spread_main_loop: + XORQ R13, R13 + MOVWQSX (CX)(R12*2), R14 + JMP spread_inner_loop_condition + +spread_inner_loop: + MOVB R12, 1(SI)(R11*8) + +adjust_position: + ADDQ R9, R11 + ANDQ R10, R11 + CMPQ R11, R8 + JG adjust_position + INCQ R13 + +spread_inner_loop_condition: + CMPQ R13, R14 + JL spread_inner_loop + INCQ R12 + +spread_main_loop_condition: + CMPQ R12, DI + JL spread_main_loop + TESTQ R11, R11 + JZ spread_check_ok + MOVQ ctx+8(FP), AX + MOVQ R11, 24(AX) + MOVQ $+1, ret+16(FP) + RET + +spread_check_ok: + // Build Decoding table + XORQ DI, DI + +build_table_main_table: + MOVBQZX 1(SI)(DI*8), CX + MOVWQZX (BX)(CX*2), R8 + LEAQ 1(R8), R9 + MOVW R9, (BX)(CX*2) + MOVQ R8, R9 + BSRQ R9, R9 + MOVQ DX, CX + SUBQ R9, CX + SHLQ CL, R8 + SUBQ AX, R8 + MOVB CL, (SI)(DI*8) + MOVW R8, 2(SI)(DI*8) + CMPQ R8, AX + JLE build_table_check1_ok + MOVQ ctx+8(FP), CX + MOVQ R8, 24(CX) + MOVQ AX, 32(CX) + MOVQ $+2, ret+16(FP) + RET + +build_table_check1_ok: + TESTB CL, CL + JNZ build_table_check2_ok + CMPW R8, DI + JNE build_table_check2_ok + MOVQ ctx+8(FP), AX + MOVQ R8, 24(AX) + MOVQ DI, 32(AX) + MOVQ $+3, ret+16(FP) + RET + +build_table_check2_ok: + INCQ DI + CMPQ DI, AX + JL build_table_main_table + MOVQ $+0, ret+16(FP) + RET diff --git a/backend/vendor/github.com/klauspost/compress/zstd/fse_decoder_generic.go b/backend/vendor/github.com/klauspost/compress/zstd/fse_decoder_generic.go new file mode 100644 index 0000000..8adfebb --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/fse_decoder_generic.go @@ -0,0 +1,73 @@ +//go:build !amd64 || appengine || !gc || noasm +// +build !amd64 appengine !gc noasm + +package zstd + +import ( + "errors" + "fmt" +) + +// buildDtable will build the decoding table. +func (s *fseDecoder) buildDtable() error { + tableSize := uint32(1 << s.actualTableLog) + highThreshold := tableSize - 1 + symbolNext := s.stateTable[:256] + + // Init, lay down lowprob symbols + { + for i, v := range s.norm[:s.symbolLen] { + if v == -1 { + s.dt[highThreshold].setAddBits(uint8(i)) + highThreshold-- + v = 1 + } + symbolNext[i] = uint16(v) + } + } + + // Spread symbols + { + tableMask := tableSize - 1 + step := tableStep(tableSize) + position := uint32(0) + for ss, v := range s.norm[:s.symbolLen] { + for i := 0; i < int(v); i++ { + s.dt[position].setAddBits(uint8(ss)) + for { + // lowprob area + position = (position + step) & tableMask + if position <= highThreshold { + break + } + } + } + } + if position != 0 { + // position must reach all cells once, otherwise normalizedCounter is incorrect + return errors.New("corrupted input (position != 0)") + } + } + + // Build Decoding table + { + tableSize := uint16(1 << s.actualTableLog) + for u, v := range s.dt[:tableSize] { + symbol := v.addBits() + nextState := symbolNext[symbol] + symbolNext[symbol] = nextState + 1 + nBits := s.actualTableLog - byte(highBits(uint32(nextState))) + s.dt[u&maxTableMask].setNBits(nBits) + newState := (nextState << nBits) - tableSize + if newState > tableSize { + return fmt.Errorf("newState (%d) outside table size (%d)", newState, tableSize) + } + if newState == uint16(u) && nBits == 0 { + // Seems weird that this is possible with nbits > 0. + return fmt.Errorf("newState (%d) == oldState (%d) and no bits", newState, u) + } + s.dt[u&maxTableMask].setNewState(newState) + } + } + return nil +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/fse_encoder.go b/backend/vendor/github.com/klauspost/compress/zstd/fse_encoder.go new file mode 100644 index 0000000..3a0f4e7 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/fse_encoder.go @@ -0,0 +1,701 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "errors" + "fmt" + "math" +) + +const ( + // For encoding we only support up to + maxEncTableLog = 8 + maxEncTablesize = 1 << maxTableLog + maxEncTableMask = (1 << maxTableLog) - 1 + minEncTablelog = 5 + maxEncSymbolValue = maxMatchLengthSymbol +) + +// Scratch provides temporary storage for compression and decompression. +type fseEncoder struct { + symbolLen uint16 // Length of active part of the symbol table. + actualTableLog uint8 // Selected tablelog. + ct cTable // Compression tables. + maxCount int // count of the most probable symbol + zeroBits bool // no bits has prob > 50%. + clearCount bool // clear count + useRLE bool // This encoder is for RLE + preDefined bool // This encoder is predefined. + reUsed bool // Set to know when the encoder has been reused. + rleVal uint8 // RLE Symbol + maxBits uint8 // Maximum output bits after transform. + + // TODO: Technically zstd should be fine with 64 bytes. + count [256]uint32 + norm [256]int16 +} + +// cTable contains tables used for compression. +type cTable struct { + tableSymbol []byte + stateTable []uint16 + symbolTT []symbolTransform +} + +// symbolTransform contains the state transform for a symbol. +type symbolTransform struct { + deltaNbBits uint32 + deltaFindState int16 + outBits uint8 +} + +// String prints values as a human readable string. +func (s symbolTransform) String() string { + return fmt.Sprintf("{deltabits: %08x, findstate:%d outbits:%d}", s.deltaNbBits, s.deltaFindState, s.outBits) +} + +// Histogram allows to populate the histogram and skip that step in the compression, +// It otherwise allows to inspect the histogram when compression is done. +// To indicate that you have populated the histogram call HistogramFinished +// with the value of the highest populated symbol, as well as the number of entries +// in the most populated entry. These are accepted at face value. +func (s *fseEncoder) Histogram() *[256]uint32 { + return &s.count +} + +// HistogramFinished can be called to indicate that the histogram has been populated. +// maxSymbol is the index of the highest set symbol of the next data segment. +// maxCount is the number of entries in the most populated entry. +// These are accepted at face value. +func (s *fseEncoder) HistogramFinished(maxSymbol uint8, maxCount int) { + s.maxCount = maxCount + s.symbolLen = uint16(maxSymbol) + 1 + s.clearCount = maxCount != 0 +} + +// allocCtable will allocate tables needed for compression. +// If existing tables a re big enough, they are simply re-used. +func (s *fseEncoder) allocCtable() { + tableSize := 1 << s.actualTableLog + // get tableSymbol that is big enough. + if cap(s.ct.tableSymbol) < tableSize { + s.ct.tableSymbol = make([]byte, tableSize) + } + s.ct.tableSymbol = s.ct.tableSymbol[:tableSize] + + ctSize := tableSize + if cap(s.ct.stateTable) < ctSize { + s.ct.stateTable = make([]uint16, ctSize) + } + s.ct.stateTable = s.ct.stateTable[:ctSize] + + if cap(s.ct.symbolTT) < 256 { + s.ct.symbolTT = make([]symbolTransform, 256) + } + s.ct.symbolTT = s.ct.symbolTT[:256] +} + +// buildCTable will populate the compression table so it is ready to be used. +func (s *fseEncoder) buildCTable() error { + tableSize := uint32(1 << s.actualTableLog) + highThreshold := tableSize - 1 + var cumul [256]int16 + + s.allocCtable() + tableSymbol := s.ct.tableSymbol[:tableSize] + // symbol start positions + { + cumul[0] = 0 + for ui, v := range s.norm[:s.symbolLen-1] { + u := byte(ui) // one less than reference + if v == -1 { + // Low proba symbol + cumul[u+1] = cumul[u] + 1 + tableSymbol[highThreshold] = u + highThreshold-- + } else { + cumul[u+1] = cumul[u] + v + } + } + // Encode last symbol separately to avoid overflowing u + u := int(s.symbolLen - 1) + v := s.norm[s.symbolLen-1] + if v == -1 { + // Low proba symbol + cumul[u+1] = cumul[u] + 1 + tableSymbol[highThreshold] = byte(u) + highThreshold-- + } else { + cumul[u+1] = cumul[u] + v + } + if uint32(cumul[s.symbolLen]) != tableSize { + return fmt.Errorf("internal error: expected cumul[s.symbolLen] (%d) == tableSize (%d)", cumul[s.symbolLen], tableSize) + } + cumul[s.symbolLen] = int16(tableSize) + 1 + } + // Spread symbols + s.zeroBits = false + { + step := tableStep(tableSize) + tableMask := tableSize - 1 + var position uint32 + // if any symbol > largeLimit, we may have 0 bits output. + largeLimit := int16(1 << (s.actualTableLog - 1)) + for ui, v := range s.norm[:s.symbolLen] { + symbol := byte(ui) + if v > largeLimit { + s.zeroBits = true + } + for range v { + tableSymbol[position] = symbol + position = (position + step) & tableMask + for position > highThreshold { + position = (position + step) & tableMask + } /* Low proba area */ + } + } + + // Check if we have gone through all positions + if position != 0 { + return errors.New("position!=0") + } + } + + // Build table + table := s.ct.stateTable + { + tsi := int(tableSize) + for u, v := range tableSymbol { + // TableU16 : sorted by symbol order; gives next state value + table[cumul[v]] = uint16(tsi + u) + cumul[v]++ + } + } + + // Build Symbol Transformation Table + { + total := int16(0) + symbolTT := s.ct.symbolTT[:s.symbolLen] + tableLog := s.actualTableLog + tl := (uint32(tableLog) << 16) - (1 << tableLog) + for i, v := range s.norm[:s.symbolLen] { + switch v { + case 0: + case -1, 1: + symbolTT[i].deltaNbBits = tl + symbolTT[i].deltaFindState = total - 1 + total++ + default: + maxBitsOut := uint32(tableLog) - highBit(uint32(v-1)) + minStatePlus := uint32(v) << maxBitsOut + symbolTT[i].deltaNbBits = (maxBitsOut << 16) - minStatePlus + symbolTT[i].deltaFindState = total - v + total += v + } + } + if total != int16(tableSize) { + return fmt.Errorf("total mismatch %d (got) != %d (want)", total, tableSize) + } + } + return nil +} + +var rtbTable = [...]uint32{0, 473195, 504333, 520860, 550000, 700000, 750000, 830000} + +func (s *fseEncoder) setRLE(val byte) { + s.allocCtable() + s.actualTableLog = 0 + s.ct.stateTable = s.ct.stateTable[:1] + s.ct.symbolTT[val] = symbolTransform{ + deltaFindState: 0, + deltaNbBits: 0, + } + if debugEncoder { + println("setRLE: val", val, "symbolTT", s.ct.symbolTT[val]) + } + s.rleVal = val + s.useRLE = true +} + +// setBits will set output bits for the transform. +// if nil is provided, the number of bits is equal to the index. +func (s *fseEncoder) setBits(transform []byte) { + if s.reUsed || s.preDefined { + return + } + if s.useRLE { + if transform == nil { + s.ct.symbolTT[s.rleVal].outBits = s.rleVal + s.maxBits = s.rleVal + return + } + s.maxBits = transform[s.rleVal] + s.ct.symbolTT[s.rleVal].outBits = s.maxBits + return + } + if transform == nil { + for i := range s.ct.symbolTT[:s.symbolLen] { + s.ct.symbolTT[i].outBits = uint8(i) + } + s.maxBits = uint8(s.symbolLen - 1) + return + } + s.maxBits = 0 + for i, v := range transform[:s.symbolLen] { + s.ct.symbolTT[i].outBits = v + if v > s.maxBits { + // We could assume bits always going up, but we play safe. + s.maxBits = v + } + } +} + +// normalizeCount will normalize the count of the symbols so +// the total is equal to the table size. +// If successful, compression tables will also be made ready. +func (s *fseEncoder) normalizeCount(length int) error { + if s.reUsed { + return nil + } + s.optimalTableLog(length) + var ( + tableLog = s.actualTableLog + scale = 62 - uint64(tableLog) + step = (1 << 62) / uint64(length) + vStep = uint64(1) << (scale - 20) + stillToDistribute = int16(1 << tableLog) + largest int + largestP int16 + lowThreshold = (uint32)(length >> tableLog) + ) + if s.maxCount == length { + s.useRLE = true + return nil + } + s.useRLE = false + for i, cnt := range s.count[:s.symbolLen] { + // already handled + // if (count[s] == s.length) return 0; /* rle special case */ + + if cnt == 0 { + s.norm[i] = 0 + continue + } + if cnt <= lowThreshold { + s.norm[i] = -1 + stillToDistribute-- + } else { + proba := (int16)((uint64(cnt) * step) >> scale) + if proba < 8 { + restToBeat := vStep * uint64(rtbTable[proba]) + v := uint64(cnt)*step - (uint64(proba) << scale) + if v > restToBeat { + proba++ + } + } + if proba > largestP { + largestP = proba + largest = i + } + s.norm[i] = proba + stillToDistribute -= proba + } + } + + if -stillToDistribute >= (s.norm[largest] >> 1) { + // corner case, need another normalization method + err := s.normalizeCount2(length) + if err != nil { + return err + } + if debugAsserts { + err = s.validateNorm() + if err != nil { + return err + } + } + return s.buildCTable() + } + s.norm[largest] += stillToDistribute + if debugAsserts { + err := s.validateNorm() + if err != nil { + return err + } + } + return s.buildCTable() +} + +// Secondary normalization method. +// To be used when primary method fails. +func (s *fseEncoder) normalizeCount2(length int) error { + const notYetAssigned = -2 + var ( + distributed uint32 + total = uint32(length) + tableLog = s.actualTableLog + lowThreshold = total >> tableLog + lowOne = (total * 3) >> (tableLog + 1) + ) + for i, cnt := range s.count[:s.symbolLen] { + if cnt == 0 { + s.norm[i] = 0 + continue + } + if cnt <= lowThreshold { + s.norm[i] = -1 + distributed++ + total -= cnt + continue + } + if cnt <= lowOne { + s.norm[i] = 1 + distributed++ + total -= cnt + continue + } + s.norm[i] = notYetAssigned + } + toDistribute := (1 << tableLog) - distributed + + if (total / toDistribute) > lowOne { + // risk of rounding to zero + lowOne = (total * 3) / (toDistribute * 2) + for i, cnt := range s.count[:s.symbolLen] { + if (s.norm[i] == notYetAssigned) && (cnt <= lowOne) { + s.norm[i] = 1 + distributed++ + total -= cnt + continue + } + } + toDistribute = (1 << tableLog) - distributed + } + if distributed == uint32(s.symbolLen)+1 { + // all values are pretty poor; + // probably incompressible data (should have already been detected); + // find max, then give all remaining points to max + var maxV int + var maxC uint32 + for i, cnt := range s.count[:s.symbolLen] { + if cnt > maxC { + maxV = i + maxC = cnt + } + } + s.norm[maxV] += int16(toDistribute) + return nil + } + + if total == 0 { + // all of the symbols were low enough for the lowOne or lowThreshold + for i := uint32(0); toDistribute > 0; i = (i + 1) % (uint32(s.symbolLen)) { + if s.norm[i] > 0 { + toDistribute-- + s.norm[i]++ + } + } + return nil + } + + var ( + vStepLog = 62 - uint64(tableLog) + mid = uint64((1 << (vStepLog - 1)) - 1) + rStep = (((1 << vStepLog) * uint64(toDistribute)) + mid) / uint64(total) // scale on remaining + tmpTotal = mid + ) + for i, cnt := range s.count[:s.symbolLen] { + if s.norm[i] == notYetAssigned { + var ( + end = tmpTotal + uint64(cnt)*rStep + sStart = uint32(tmpTotal >> vStepLog) + sEnd = uint32(end >> vStepLog) + weight = sEnd - sStart + ) + if weight < 1 { + return errors.New("weight < 1") + } + s.norm[i] = int16(weight) + tmpTotal = end + } + } + return nil +} + +// optimalTableLog calculates and sets the optimal tableLog in s.actualTableLog +func (s *fseEncoder) optimalTableLog(length int) { + tableLog := uint8(maxEncTableLog) + minBitsSrc := highBit(uint32(length)) + 1 + minBitsSymbols := highBit(uint32(s.symbolLen-1)) + 2 + minBits := uint8(minBitsSymbols) + if minBitsSrc < minBitsSymbols { + minBits = uint8(minBitsSrc) + } + + maxBitsSrc := uint8(highBit(uint32(length-1))) - 2 + if maxBitsSrc < tableLog { + // Accuracy can be reduced + tableLog = maxBitsSrc + } + if minBits > tableLog { + tableLog = minBits + } + // Need a minimum to safely represent all symbol values + if tableLog < minEncTablelog { + tableLog = minEncTablelog + } + if tableLog > maxEncTableLog { + tableLog = maxEncTableLog + } + s.actualTableLog = tableLog +} + +// validateNorm validates the normalized histogram table. +func (s *fseEncoder) validateNorm() (err error) { + var total int + for _, v := range s.norm[:s.symbolLen] { + if v >= 0 { + total += int(v) + } else { + total -= int(v) + } + } + defer func() { + if err == nil { + return + } + fmt.Printf("selected TableLog: %d, Symbol length: %d\n", s.actualTableLog, s.symbolLen) + for i, v := range s.norm[:s.symbolLen] { + fmt.Printf("%3d: %5d -> %4d \n", i, s.count[i], v) + } + }() + if total != (1 << s.actualTableLog) { + return fmt.Errorf("warning: Total == %d != %d", total, 1<> 3) + 3 + 2 + + // Write Table Size + bitStream = uint32(tableLog - minEncTablelog) + bitCount = uint(4) + remaining = int16(tableSize + 1) /* +1 for extra accuracy */ + threshold = int16(tableSize) + nbBits = uint(tableLog + 1) + outP = len(out) + ) + if cap(out) < outP+maxHeaderSize { + out = append(out, make([]byte, maxHeaderSize*3)...) + out = out[:len(out)-maxHeaderSize*3] + } + out = out[:outP+maxHeaderSize] + + // stops at 1 + for remaining > 1 { + if previous0 { + start := charnum + for s.norm[charnum] == 0 { + charnum++ + } + for charnum >= start+24 { + start += 24 + bitStream += uint32(0xFFFF) << bitCount + out[outP] = byte(bitStream) + out[outP+1] = byte(bitStream >> 8) + outP += 2 + bitStream >>= 16 + } + for charnum >= start+3 { + start += 3 + bitStream += 3 << bitCount + bitCount += 2 + } + bitStream += uint32(charnum-start) << bitCount + bitCount += 2 + if bitCount > 16 { + out[outP] = byte(bitStream) + out[outP+1] = byte(bitStream >> 8) + outP += 2 + bitStream >>= 16 + bitCount -= 16 + } + } + + count := s.norm[charnum] + charnum++ + max := (2*threshold - 1) - remaining + if count < 0 { + remaining += count + } else { + remaining -= count + } + count++ // +1 for extra accuracy + if count >= threshold { + count += max // [0..max[ [max..threshold[ (...) [threshold+max 2*threshold[ + } + bitStream += uint32(count) << bitCount + bitCount += nbBits + if count < max { + bitCount-- + } + + previous0 = count == 1 + if remaining < 1 { + return nil, errors.New("internal error: remaining < 1") + } + for remaining < threshold { + nbBits-- + threshold >>= 1 + } + + if bitCount > 16 { + out[outP] = byte(bitStream) + out[outP+1] = byte(bitStream >> 8) + outP += 2 + bitStream >>= 16 + bitCount -= 16 + } + } + + if outP+2 > len(out) { + return nil, fmt.Errorf("internal error: %d > %d, maxheader: %d, sl: %d, tl: %d, normcount: %v", outP+2, len(out), maxHeaderSize, s.symbolLen, int(tableLog), s.norm[:s.symbolLen]) + } + out[outP] = byte(bitStream) + out[outP+1] = byte(bitStream >> 8) + outP += int((bitCount + 7) / 8) + + if charnum > s.symbolLen { + return nil, errors.New("internal error: charnum > s.symbolLen") + } + return out[:outP], nil +} + +// Approximate symbol cost, as fractional value, using fixed-point format (accuracyLog fractional bits) +// note 1 : assume symbolValue is valid (<= maxSymbolValue) +// note 2 : if freq[symbolValue]==0, @return a fake cost of tableLog+1 bits * +func (s *fseEncoder) bitCost(symbolValue uint8, accuracyLog uint32) uint32 { + minNbBits := s.ct.symbolTT[symbolValue].deltaNbBits >> 16 + threshold := (minNbBits + 1) << 16 + if debugAsserts { + if !(s.actualTableLog < 16) { + panic("!s.actualTableLog < 16") + } + // ensure enough room for renormalization double shift + if !(uint8(accuracyLog) < 31-s.actualTableLog) { + panic("!uint8(accuracyLog) < 31-s.actualTableLog") + } + } + tableSize := uint32(1) << s.actualTableLog + deltaFromThreshold := threshold - (s.ct.symbolTT[symbolValue].deltaNbBits + tableSize) + // linear interpolation (very approximate) + normalizedDeltaFromThreshold := (deltaFromThreshold << accuracyLog) >> s.actualTableLog + bitMultiplier := uint32(1) << accuracyLog + if debugAsserts { + if s.ct.symbolTT[symbolValue].deltaNbBits+tableSize > threshold { + panic("s.ct.symbolTT[symbolValue].deltaNbBits+tableSize > threshold") + } + if normalizedDeltaFromThreshold > bitMultiplier { + panic("normalizedDeltaFromThreshold > bitMultiplier") + } + } + return (minNbBits+1)*bitMultiplier - normalizedDeltaFromThreshold +} + +// Returns the cost in bits of encoding the distribution in count using ctable. +// Histogram should only be up to the last non-zero symbol. +// Returns an -1 if ctable cannot represent all the symbols in count. +func (s *fseEncoder) approxSize(hist []uint32) uint32 { + if int(s.symbolLen) < len(hist) { + // More symbols than we have. + return math.MaxUint32 + } + if s.useRLE { + // We will never reuse RLE encoders. + return math.MaxUint32 + } + const kAccuracyLog = 8 + badCost := (uint32(s.actualTableLog) + 1) << kAccuracyLog + var cost uint32 + for i, v := range hist { + if v == 0 { + continue + } + if s.norm[i] == 0 { + return math.MaxUint32 + } + bitCost := s.bitCost(uint8(i), kAccuracyLog) + if bitCost > badCost { + return math.MaxUint32 + } + cost += v * bitCost + } + return cost >> kAccuracyLog +} + +// maxHeaderSize returns the maximum header size in bits. +// This is not exact size, but we want a penalty for new tables anyway. +func (s *fseEncoder) maxHeaderSize() uint32 { + if s.preDefined { + return 0 + } + if s.useRLE { + return 8 + } + return (((uint32(s.symbolLen) * uint32(s.actualTableLog)) >> 3) + 3) * 8 +} + +// cState contains the compression state of a stream. +type cState struct { + bw *bitWriter + stateTable []uint16 + state uint16 +} + +// init will initialize the compression state to the first symbol of the stream. +func (c *cState) init(bw *bitWriter, ct *cTable, first symbolTransform) { + c.bw = bw + c.stateTable = ct.stateTable + if len(c.stateTable) == 1 { + // RLE + c.stateTable[0] = uint16(0) + c.state = 0 + return + } + nbBitsOut := (first.deltaNbBits + (1 << 15)) >> 16 + im := int32((nbBitsOut << 16) - first.deltaNbBits) + lu := (im >> nbBitsOut) + int32(first.deltaFindState) + c.state = c.stateTable[lu] +} + +// flush will write the tablelog to the output and flush the remaining full bytes. +func (c *cState) flush(tableLog uint8) { + c.bw.flush32() + c.bw.addBits16NC(c.state, tableLog) +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/fse_predefined.go b/backend/vendor/github.com/klauspost/compress/zstd/fse_predefined.go new file mode 100644 index 0000000..474cb77 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/fse_predefined.go @@ -0,0 +1,158 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "fmt" + "math" + "sync" +) + +var ( + // fsePredef are the predefined fse tables as defined here: + // https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#default-distributions + // These values are already transformed. + fsePredef [3]fseDecoder + + // fsePredefEnc are the predefined encoder based on fse tables as defined here: + // https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#default-distributions + // These values are already transformed. + fsePredefEnc [3]fseEncoder + + // symbolTableX contain the transformations needed for each type as defined in + // https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#the-codes-for-literals-lengths-match-lengths-and-offsets + symbolTableX [3][]baseOffset + + // maxTableSymbol is the biggest supported symbol for each table type + // https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#the-codes-for-literals-lengths-match-lengths-and-offsets + maxTableSymbol = [3]uint8{tableLiteralLengths: maxLiteralLengthSymbol, tableOffsets: maxOffsetLengthSymbol, tableMatchLengths: maxMatchLengthSymbol} + + // bitTables is the bits table for each table. + bitTables = [3][]byte{tableLiteralLengths: llBitsTable[:], tableOffsets: nil, tableMatchLengths: mlBitsTable[:]} +) + +type tableIndex uint8 + +const ( + // indexes for fsePredef and symbolTableX + tableLiteralLengths tableIndex = 0 + tableOffsets tableIndex = 1 + tableMatchLengths tableIndex = 2 + + maxLiteralLengthSymbol = 35 + maxOffsetLengthSymbol = 30 + maxMatchLengthSymbol = 52 +) + +// baseOffset is used for calculating transformations. +type baseOffset struct { + baseLine uint32 + addBits uint8 +} + +// fillBase will precalculate base offsets with the given bit distributions. +func fillBase(dst []baseOffset, base uint32, bits ...uint8) { + if len(bits) != len(dst) { + panic(fmt.Sprintf("len(dst) (%d) != len(bits) (%d)", len(dst), len(bits))) + } + for i, bit := range bits { + if base > math.MaxInt32 { + panic("invalid decoding table, base overflows int32") + } + + dst[i] = baseOffset{ + baseLine: base, + addBits: bit, + } + base += 1 << bit + } +} + +var predef sync.Once + +func initPredefined() { + predef.Do(func() { + // Literals length codes + tmp := make([]baseOffset, 36) + for i := range tmp[:16] { + tmp[i] = baseOffset{ + baseLine: uint32(i), + addBits: 0, + } + } + fillBase(tmp[16:], 16, 1, 1, 1, 1, 2, 2, 3, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16) + symbolTableX[tableLiteralLengths] = tmp + + // Match length codes + tmp = make([]baseOffset, 53) + for i := range tmp[:32] { + tmp[i] = baseOffset{ + // The transformation adds the 3 length. + baseLine: uint32(i) + 3, + addBits: 0, + } + } + fillBase(tmp[32:], 35, 1, 1, 1, 1, 2, 2, 3, 3, 4, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16) + symbolTableX[tableMatchLengths] = tmp + + // Offset codes + tmp = make([]baseOffset, maxOffsetBits+1) + tmp[1] = baseOffset{ + baseLine: 1, + addBits: 1, + } + fillBase(tmp[2:], 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30) + symbolTableX[tableOffsets] = tmp + + // Fill predefined tables and transform them. + // https://github.com/facebook/zstd/blob/dev/doc/zstd_compression_format.md#default-distributions + for i := range fsePredef[:] { + f := &fsePredef[i] + switch tableIndex(i) { + case tableLiteralLengths: + // https://github.com/facebook/zstd/blob/ededcfca57366461021c922720878c81a5854a0a/lib/decompress/zstd_decompress_block.c#L243 + f.actualTableLog = 6 + copy(f.norm[:], []int16{4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 1, 1, 1, 1, 1, + -1, -1, -1, -1}) + f.symbolLen = 36 + case tableOffsets: + // https://github.com/facebook/zstd/blob/ededcfca57366461021c922720878c81a5854a0a/lib/decompress/zstd_decompress_block.c#L281 + f.actualTableLog = 5 + copy(f.norm[:], []int16{ + 1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, -1, -1, -1, -1, -1}) + f.symbolLen = 29 + case tableMatchLengths: + //https://github.com/facebook/zstd/blob/ededcfca57366461021c922720878c81a5854a0a/lib/decompress/zstd_decompress_block.c#L304 + f.actualTableLog = 6 + copy(f.norm[:], []int16{ + 1, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, -1, + -1, -1, -1, -1, -1}) + f.symbolLen = 53 + } + if err := f.buildDtable(); err != nil { + panic(fmt.Errorf("building table %v: %v", tableIndex(i), err)) + } + if err := f.transform(symbolTableX[i]); err != nil { + panic(fmt.Errorf("building table %v: %v", tableIndex(i), err)) + } + f.preDefined = true + + // Create encoder as well + enc := &fsePredefEnc[i] + copy(enc.norm[:], f.norm[:]) + enc.symbolLen = f.symbolLen + enc.actualTableLog = f.actualTableLog + if err := enc.buildCTable(); err != nil { + panic(fmt.Errorf("building encoding table %v: %v", tableIndex(i), err)) + } + enc.setBits(bitTables[i]) + enc.preDefined = true + } + }) +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/hash.go b/backend/vendor/github.com/klauspost/compress/zstd/hash.go new file mode 100644 index 0000000..5d73c21 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/hash.go @@ -0,0 +1,35 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +const ( + prime3bytes = 506832829 + prime4bytes = 2654435761 + prime5bytes = 889523592379 + prime6bytes = 227718039650203 + prime7bytes = 58295818150454627 + prime8bytes = 0xcf1bbcdcb7a56463 +) + +// hashLen returns a hash of the lowest mls bytes of with length output bits. +// mls must be >=3 and <=8. Any other value will return hash for 4 bytes. +// length should always be < 32. +// Preferably length and mls should be a constant for inlining. +func hashLen(u uint64, length, mls uint8) uint32 { + switch mls { + case 3: + return (uint32(u<<8) * prime3bytes) >> (32 - length) + case 5: + return uint32(((u << (64 - 40)) * prime5bytes) >> (64 - length)) + case 6: + return uint32(((u << (64 - 48)) * prime6bytes) >> (64 - length)) + case 7: + return uint32(((u << (64 - 56)) * prime7bytes) >> (64 - length)) + case 8: + return uint32((u * prime8bytes) >> (64 - length)) + default: + return (uint32(u) * prime4bytes) >> (32 - length) + } +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/history.go b/backend/vendor/github.com/klauspost/compress/zstd/history.go new file mode 100644 index 0000000..0916485 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/history.go @@ -0,0 +1,116 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "github.com/klauspost/compress/huff0" +) + +// history contains the information transferred between blocks. +type history struct { + // Literal decompression + huffTree *huff0.Scratch + + // Sequence decompression + decoders sequenceDecs + recentOffsets [3]int + + // History buffer... + b []byte + + // ignoreBuffer is meant to ignore a number of bytes + // when checking for matches in history + ignoreBuffer int + + windowSize int + allocFrameBuffer int // needed? + error bool + dict *dict +} + +// reset will reset the history to initial state of a frame. +// The history must already have been initialized to the desired size. +func (h *history) reset() { + h.b = h.b[:0] + h.ignoreBuffer = 0 + h.error = false + h.recentOffsets = [3]int{1, 4, 8} + h.decoders.freeDecoders() + h.decoders = sequenceDecs{br: h.decoders.br} + h.freeHuffDecoder() + h.huffTree = nil + h.dict = nil + //printf("history created: %+v (l: %d, c: %d)", *h, len(h.b), cap(h.b)) +} + +func (h *history) freeHuffDecoder() { + if h.huffTree != nil { + if h.dict == nil || h.dict.litEnc != h.huffTree { + huffDecoderPool.Put(h.huffTree) + h.huffTree = nil + } + } +} + +func (h *history) setDict(dict *dict) { + if dict == nil { + return + } + h.dict = dict + h.decoders.litLengths = dict.llDec + h.decoders.offsets = dict.ofDec + h.decoders.matchLengths = dict.mlDec + h.decoders.dict = dict.content + h.recentOffsets = dict.offsets + h.huffTree = dict.litEnc +} + +// append bytes to history. +// This function will make sure there is space for it, +// if the buffer has been allocated with enough extra space. +func (h *history) append(b []byte) { + if len(b) >= h.windowSize { + // Discard all history by simply overwriting + h.b = h.b[:h.windowSize] + copy(h.b, b[len(b)-h.windowSize:]) + return + } + + // If there is space, append it. + if len(b) < cap(h.b)-len(h.b) { + h.b = append(h.b, b...) + return + } + + // Move data down so we only have window size left. + // We know we have less than window size in b at this point. + discard := len(b) + len(h.b) - h.windowSize + copy(h.b, h.b[discard:]) + h.b = h.b[:h.windowSize] + copy(h.b[h.windowSize-len(b):], b) +} + +// ensureBlock will ensure there is space for at least one block... +func (h *history) ensureBlock() { + if cap(h.b) < h.allocFrameBuffer { + h.b = make([]byte, 0, h.allocFrameBuffer) + return + } + + avail := cap(h.b) - len(h.b) + if avail >= h.windowSize || avail > maxCompressedBlockSize { + return + } + // Move data down so we only have window size left. + // We know we have less than window size in b at this point. + discard := len(h.b) - h.windowSize + copy(h.b, h.b[discard:]) + h.b = h.b[:h.windowSize] +} + +// append bytes to history without ever discarding anything. +func (h *history) appendKeep(b []byte) { + h.b = append(h.b, b...) +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/LICENSE.txt b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/LICENSE.txt new file mode 100644 index 0000000..24b5306 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/LICENSE.txt @@ -0,0 +1,22 @@ +Copyright (c) 2016 Caleb Spare + +MIT License + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/README.md b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/README.md new file mode 100644 index 0000000..777290d --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/README.md @@ -0,0 +1,71 @@ +# xxhash + +VENDORED: Go to [github.com/cespare/xxhash](https://github.com/cespare/xxhash) for original package. + +xxhash is a Go implementation of the 64-bit [xxHash] algorithm, XXH64. This is a +high-quality hashing algorithm that is much faster than anything in the Go +standard library. + +This package provides a straightforward API: + +``` +func Sum64(b []byte) uint64 +func Sum64String(s string) uint64 +type Digest struct{ ... } + func New() *Digest +``` + +The `Digest` type implements hash.Hash64. Its key methods are: + +``` +func (*Digest) Write([]byte) (int, error) +func (*Digest) WriteString(string) (int, error) +func (*Digest) Sum64() uint64 +``` + +The package is written with optimized pure Go and also contains even faster +assembly implementations for amd64 and arm64. If desired, the `purego` build tag +opts into using the Go code even on those architectures. + +[xxHash]: http://cyan4973.github.io/xxHash/ + +## Compatibility + +This package is in a module and the latest code is in version 2 of the module. +You need a version of Go with at least "minimal module compatibility" to use +github.com/cespare/xxhash/v2: + +* 1.9.7+ for Go 1.9 +* 1.10.3+ for Go 1.10 +* Go 1.11 or later + +I recommend using the latest release of Go. + +## Benchmarks + +Here are some quick benchmarks comparing the pure-Go and assembly +implementations of Sum64. + +| input size | purego | asm | +| ---------- | --------- | --------- | +| 4 B | 1.3 GB/s | 1.2 GB/s | +| 16 B | 2.9 GB/s | 3.5 GB/s | +| 100 B | 6.9 GB/s | 8.1 GB/s | +| 4 KB | 11.7 GB/s | 16.7 GB/s | +| 10 MB | 12.0 GB/s | 17.3 GB/s | + +These numbers were generated on Ubuntu 20.04 with an Intel Xeon Platinum 8252C +CPU using the following commands under Go 1.19.2: + +``` +benchstat <(go test -tags purego -benchtime 500ms -count 15 -bench 'Sum64$') +benchstat <(go test -benchtime 500ms -count 15 -bench 'Sum64$') +``` + +## Projects using this package + +- [InfluxDB](https://github.com/influxdata/influxdb) +- [Prometheus](https://github.com/prometheus/prometheus) +- [VictoriaMetrics](https://github.com/VictoriaMetrics/VictoriaMetrics) +- [FreeCache](https://github.com/coocood/freecache) +- [FastCache](https://github.com/VictoriaMetrics/fastcache) diff --git a/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash.go b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash.go new file mode 100644 index 0000000..fc40c82 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash.go @@ -0,0 +1,230 @@ +// Package xxhash implements the 64-bit variant of xxHash (XXH64) as described +// at http://cyan4973.github.io/xxHash/. +// THIS IS VENDORED: Go to github.com/cespare/xxhash for original package. + +package xxhash + +import ( + "encoding/binary" + "errors" + "math/bits" +) + +const ( + prime1 uint64 = 11400714785074694791 + prime2 uint64 = 14029467366897019727 + prime3 uint64 = 1609587929392839161 + prime4 uint64 = 9650029242287828579 + prime5 uint64 = 2870177450012600261 +) + +// Store the primes in an array as well. +// +// The consts are used when possible in Go code to avoid MOVs but we need a +// contiguous array of the assembly code. +var primes = [...]uint64{prime1, prime2, prime3, prime4, prime5} + +// Digest implements hash.Hash64. +type Digest struct { + v1 uint64 + v2 uint64 + v3 uint64 + v4 uint64 + total uint64 + mem [32]byte + n int // how much of mem is used +} + +// New creates a new Digest that computes the 64-bit xxHash algorithm. +func New() *Digest { + var d Digest + d.Reset() + return &d +} + +// Reset clears the Digest's state so that it can be reused. +func (d *Digest) Reset() { + d.v1 = primes[0] + prime2 + d.v2 = prime2 + d.v3 = 0 + d.v4 = -primes[0] + d.total = 0 + d.n = 0 +} + +// Size always returns 8 bytes. +func (d *Digest) Size() int { return 8 } + +// BlockSize always returns 32 bytes. +func (d *Digest) BlockSize() int { return 32 } + +// Write adds more data to d. It always returns len(b), nil. +func (d *Digest) Write(b []byte) (n int, err error) { + n = len(b) + d.total += uint64(n) + + memleft := d.mem[d.n&(len(d.mem)-1):] + + if d.n+n < 32 { + // This new data doesn't even fill the current block. + copy(memleft, b) + d.n += n + return + } + + if d.n > 0 { + // Finish off the partial block. + c := copy(memleft, b) + d.v1 = round(d.v1, u64(d.mem[0:8])) + d.v2 = round(d.v2, u64(d.mem[8:16])) + d.v3 = round(d.v3, u64(d.mem[16:24])) + d.v4 = round(d.v4, u64(d.mem[24:32])) + b = b[c:] + d.n = 0 + } + + if len(b) >= 32 { + // One or more full blocks left. + nw := writeBlocks(d, b) + b = b[nw:] + } + + // Store any remaining partial block. + copy(d.mem[:], b) + d.n = len(b) + + return +} + +// Sum appends the current hash to b and returns the resulting slice. +func (d *Digest) Sum(b []byte) []byte { + s := d.Sum64() + return append( + b, + byte(s>>56), + byte(s>>48), + byte(s>>40), + byte(s>>32), + byte(s>>24), + byte(s>>16), + byte(s>>8), + byte(s), + ) +} + +// Sum64 returns the current hash. +func (d *Digest) Sum64() uint64 { + var h uint64 + + if d.total >= 32 { + v1, v2, v3, v4 := d.v1, d.v2, d.v3, d.v4 + h = rol1(v1) + rol7(v2) + rol12(v3) + rol18(v4) + h = mergeRound(h, v1) + h = mergeRound(h, v2) + h = mergeRound(h, v3) + h = mergeRound(h, v4) + } else { + h = d.v3 + prime5 + } + + h += d.total + + b := d.mem[:d.n&(len(d.mem)-1)] + for ; len(b) >= 8; b = b[8:] { + k1 := round(0, u64(b[:8])) + h ^= k1 + h = rol27(h)*prime1 + prime4 + } + if len(b) >= 4 { + h ^= uint64(u32(b[:4])) * prime1 + h = rol23(h)*prime2 + prime3 + b = b[4:] + } + for ; len(b) > 0; b = b[1:] { + h ^= uint64(b[0]) * prime5 + h = rol11(h) * prime1 + } + + h ^= h >> 33 + h *= prime2 + h ^= h >> 29 + h *= prime3 + h ^= h >> 32 + + return h +} + +const ( + magic = "xxh\x06" + marshaledSize = len(magic) + 8*5 + 32 +) + +// MarshalBinary implements the encoding.BinaryMarshaler interface. +func (d *Digest) MarshalBinary() ([]byte, error) { + b := make([]byte, 0, marshaledSize) + b = append(b, magic...) + b = appendUint64(b, d.v1) + b = appendUint64(b, d.v2) + b = appendUint64(b, d.v3) + b = appendUint64(b, d.v4) + b = appendUint64(b, d.total) + b = append(b, d.mem[:d.n]...) + b = b[:len(b)+len(d.mem)-d.n] + return b, nil +} + +// UnmarshalBinary implements the encoding.BinaryUnmarshaler interface. +func (d *Digest) UnmarshalBinary(b []byte) error { + if len(b) < len(magic) || string(b[:len(magic)]) != magic { + return errors.New("xxhash: invalid hash state identifier") + } + if len(b) != marshaledSize { + return errors.New("xxhash: invalid hash state size") + } + b = b[len(magic):] + b, d.v1 = consumeUint64(b) + b, d.v2 = consumeUint64(b) + b, d.v3 = consumeUint64(b) + b, d.v4 = consumeUint64(b) + b, d.total = consumeUint64(b) + copy(d.mem[:], b) + d.n = int(d.total % uint64(len(d.mem))) + return nil +} + +func appendUint64(b []byte, x uint64) []byte { + var a [8]byte + binary.LittleEndian.PutUint64(a[:], x) + return append(b, a[:]...) +} + +func consumeUint64(b []byte) ([]byte, uint64) { + x := u64(b) + return b[8:], x +} + +func u64(b []byte) uint64 { return binary.LittleEndian.Uint64(b) } +func u32(b []byte) uint32 { return binary.LittleEndian.Uint32(b) } + +func round(acc, input uint64) uint64 { + acc += input * prime2 + acc = rol31(acc) + acc *= prime1 + return acc +} + +func mergeRound(acc, val uint64) uint64 { + val = round(0, val) + acc ^= val + acc = acc*prime1 + prime4 + return acc +} + +func rol1(x uint64) uint64 { return bits.RotateLeft64(x, 1) } +func rol7(x uint64) uint64 { return bits.RotateLeft64(x, 7) } +func rol11(x uint64) uint64 { return bits.RotateLeft64(x, 11) } +func rol12(x uint64) uint64 { return bits.RotateLeft64(x, 12) } +func rol18(x uint64) uint64 { return bits.RotateLeft64(x, 18) } +func rol23(x uint64) uint64 { return bits.RotateLeft64(x, 23) } +func rol27(x uint64) uint64 { return bits.RotateLeft64(x, 27) } +func rol31(x uint64) uint64 { return bits.RotateLeft64(x, 31) } diff --git a/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash_amd64.s b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash_amd64.s new file mode 100644 index 0000000..ddb63aa --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash_amd64.s @@ -0,0 +1,210 @@ +//go:build !appengine && gc && !purego && !noasm +// +build !appengine +// +build gc +// +build !purego +// +build !noasm + +#include "textflag.h" + +// Registers: +#define h AX +#define d AX +#define p SI // pointer to advance through b +#define n DX +#define end BX // loop end +#define v1 R8 +#define v2 R9 +#define v3 R10 +#define v4 R11 +#define x R12 +#define prime1 R13 +#define prime2 R14 +#define prime4 DI + +#define round(acc, x) \ + IMULQ prime2, x \ + ADDQ x, acc \ + ROLQ $31, acc \ + IMULQ prime1, acc + +// round0 performs the operation x = round(0, x). +#define round0(x) \ + IMULQ prime2, x \ + ROLQ $31, x \ + IMULQ prime1, x + +// mergeRound applies a merge round on the two registers acc and x. +// It assumes that prime1, prime2, and prime4 have been loaded. +#define mergeRound(acc, x) \ + round0(x) \ + XORQ x, acc \ + IMULQ prime1, acc \ + ADDQ prime4, acc + +// blockLoop processes as many 32-byte blocks as possible, +// updating v1, v2, v3, and v4. It assumes that there is at least one block +// to process. +#define blockLoop() \ +loop: \ + MOVQ +0(p), x \ + round(v1, x) \ + MOVQ +8(p), x \ + round(v2, x) \ + MOVQ +16(p), x \ + round(v3, x) \ + MOVQ +24(p), x \ + round(v4, x) \ + ADDQ $32, p \ + CMPQ p, end \ + JLE loop + +// func Sum64(b []byte) uint64 +TEXT ·Sum64(SB), NOSPLIT|NOFRAME, $0-32 + // Load fixed primes. + MOVQ ·primes+0(SB), prime1 + MOVQ ·primes+8(SB), prime2 + MOVQ ·primes+24(SB), prime4 + + // Load slice. + MOVQ b_base+0(FP), p + MOVQ b_len+8(FP), n + LEAQ (p)(n*1), end + + // The first loop limit will be len(b)-32. + SUBQ $32, end + + // Check whether we have at least one block. + CMPQ n, $32 + JLT noBlocks + + // Set up initial state (v1, v2, v3, v4). + MOVQ prime1, v1 + ADDQ prime2, v1 + MOVQ prime2, v2 + XORQ v3, v3 + XORQ v4, v4 + SUBQ prime1, v4 + + blockLoop() + + MOVQ v1, h + ROLQ $1, h + MOVQ v2, x + ROLQ $7, x + ADDQ x, h + MOVQ v3, x + ROLQ $12, x + ADDQ x, h + MOVQ v4, x + ROLQ $18, x + ADDQ x, h + + mergeRound(h, v1) + mergeRound(h, v2) + mergeRound(h, v3) + mergeRound(h, v4) + + JMP afterBlocks + +noBlocks: + MOVQ ·primes+32(SB), h + +afterBlocks: + ADDQ n, h + + ADDQ $24, end + CMPQ p, end + JG try4 + +loop8: + MOVQ (p), x + ADDQ $8, p + round0(x) + XORQ x, h + ROLQ $27, h + IMULQ prime1, h + ADDQ prime4, h + + CMPQ p, end + JLE loop8 + +try4: + ADDQ $4, end + CMPQ p, end + JG try1 + + MOVL (p), x + ADDQ $4, p + IMULQ prime1, x + XORQ x, h + + ROLQ $23, h + IMULQ prime2, h + ADDQ ·primes+16(SB), h + +try1: + ADDQ $4, end + CMPQ p, end + JGE finalize + +loop1: + MOVBQZX (p), x + ADDQ $1, p + IMULQ ·primes+32(SB), x + XORQ x, h + ROLQ $11, h + IMULQ prime1, h + + CMPQ p, end + JL loop1 + +finalize: + MOVQ h, x + SHRQ $33, x + XORQ x, h + IMULQ prime2, h + MOVQ h, x + SHRQ $29, x + XORQ x, h + IMULQ ·primes+16(SB), h + MOVQ h, x + SHRQ $32, x + XORQ x, h + + MOVQ h, ret+24(FP) + RET + +// func writeBlocks(d *Digest, b []byte) int +TEXT ·writeBlocks(SB), NOSPLIT|NOFRAME, $0-40 + // Load fixed primes needed for round. + MOVQ ·primes+0(SB), prime1 + MOVQ ·primes+8(SB), prime2 + + // Load slice. + MOVQ b_base+8(FP), p + MOVQ b_len+16(FP), n + LEAQ (p)(n*1), end + SUBQ $32, end + + // Load vN from d. + MOVQ s+0(FP), d + MOVQ 0(d), v1 + MOVQ 8(d), v2 + MOVQ 16(d), v3 + MOVQ 24(d), v4 + + // We don't need to check the loop condition here; this function is + // always called with at least one block of data to process. + blockLoop() + + // Copy vN back to d. + MOVQ v1, 0(d) + MOVQ v2, 8(d) + MOVQ v3, 16(d) + MOVQ v4, 24(d) + + // The number of bytes written is p minus the old base pointer. + SUBQ b_base+8(FP), p + MOVQ p, ret+32(FP) + + RET diff --git a/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash_arm64.s b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash_arm64.s new file mode 100644 index 0000000..ae7d4d3 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash_arm64.s @@ -0,0 +1,184 @@ +//go:build !appengine && gc && !purego && !noasm +// +build !appengine +// +build gc +// +build !purego +// +build !noasm + +#include "textflag.h" + +// Registers: +#define digest R1 +#define h R2 // return value +#define p R3 // input pointer +#define n R4 // input length +#define nblocks R5 // n / 32 +#define prime1 R7 +#define prime2 R8 +#define prime3 R9 +#define prime4 R10 +#define prime5 R11 +#define v1 R12 +#define v2 R13 +#define v3 R14 +#define v4 R15 +#define x1 R20 +#define x2 R21 +#define x3 R22 +#define x4 R23 + +#define round(acc, x) \ + MADD prime2, acc, x, acc \ + ROR $64-31, acc \ + MUL prime1, acc + +// round0 performs the operation x = round(0, x). +#define round0(x) \ + MUL prime2, x \ + ROR $64-31, x \ + MUL prime1, x + +#define mergeRound(acc, x) \ + round0(x) \ + EOR x, acc \ + MADD acc, prime4, prime1, acc + +// blockLoop processes as many 32-byte blocks as possible, +// updating v1, v2, v3, and v4. It assumes that n >= 32. +#define blockLoop() \ + LSR $5, n, nblocks \ + PCALIGN $16 \ + loop: \ + LDP.P 16(p), (x1, x2) \ + LDP.P 16(p), (x3, x4) \ + round(v1, x1) \ + round(v2, x2) \ + round(v3, x3) \ + round(v4, x4) \ + SUB $1, nblocks \ + CBNZ nblocks, loop + +// func Sum64(b []byte) uint64 +TEXT ·Sum64(SB), NOSPLIT|NOFRAME, $0-32 + LDP b_base+0(FP), (p, n) + + LDP ·primes+0(SB), (prime1, prime2) + LDP ·primes+16(SB), (prime3, prime4) + MOVD ·primes+32(SB), prime5 + + CMP $32, n + CSEL LT, prime5, ZR, h // if n < 32 { h = prime5 } else { h = 0 } + BLT afterLoop + + ADD prime1, prime2, v1 + MOVD prime2, v2 + MOVD $0, v3 + NEG prime1, v4 + + blockLoop() + + ROR $64-1, v1, x1 + ROR $64-7, v2, x2 + ADD x1, x2 + ROR $64-12, v3, x3 + ROR $64-18, v4, x4 + ADD x3, x4 + ADD x2, x4, h + + mergeRound(h, v1) + mergeRound(h, v2) + mergeRound(h, v3) + mergeRound(h, v4) + +afterLoop: + ADD n, h + + TBZ $4, n, try8 + LDP.P 16(p), (x1, x2) + + round0(x1) + + // NOTE: here and below, sequencing the EOR after the ROR (using a + // rotated register) is worth a small but measurable speedup for small + // inputs. + ROR $64-27, h + EOR x1 @> 64-27, h, h + MADD h, prime4, prime1, h + + round0(x2) + ROR $64-27, h + EOR x2 @> 64-27, h, h + MADD h, prime4, prime1, h + +try8: + TBZ $3, n, try4 + MOVD.P 8(p), x1 + + round0(x1) + ROR $64-27, h + EOR x1 @> 64-27, h, h + MADD h, prime4, prime1, h + +try4: + TBZ $2, n, try2 + MOVWU.P 4(p), x2 + + MUL prime1, x2 + ROR $64-23, h + EOR x2 @> 64-23, h, h + MADD h, prime3, prime2, h + +try2: + TBZ $1, n, try1 + MOVHU.P 2(p), x3 + AND $255, x3, x1 + LSR $8, x3, x2 + + MUL prime5, x1 + ROR $64-11, h + EOR x1 @> 64-11, h, h + MUL prime1, h + + MUL prime5, x2 + ROR $64-11, h + EOR x2 @> 64-11, h, h + MUL prime1, h + +try1: + TBZ $0, n, finalize + MOVBU (p), x4 + + MUL prime5, x4 + ROR $64-11, h + EOR x4 @> 64-11, h, h + MUL prime1, h + +finalize: + EOR h >> 33, h + MUL prime2, h + EOR h >> 29, h + MUL prime3, h + EOR h >> 32, h + + MOVD h, ret+24(FP) + RET + +// func writeBlocks(s *Digest, b []byte) int +TEXT ·writeBlocks(SB), NOSPLIT|NOFRAME, $0-40 + LDP ·primes+0(SB), (prime1, prime2) + + // Load state. Assume v[1-4] are stored contiguously. + MOVD s+0(FP), digest + LDP 0(digest), (v1, v2) + LDP 16(digest), (v3, v4) + + LDP b_base+8(FP), (p, n) + + blockLoop() + + // Store updated state. + STP (v1, v2), 0(digest) + STP (v3, v4), 16(digest) + + BIC $31, n + MOVD n, ret+32(FP) + RET diff --git a/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash_asm.go b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash_asm.go new file mode 100644 index 0000000..d4221ed --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash_asm.go @@ -0,0 +1,16 @@ +//go:build (amd64 || arm64) && !appengine && gc && !purego && !noasm +// +build amd64 arm64 +// +build !appengine +// +build gc +// +build !purego +// +build !noasm + +package xxhash + +// Sum64 computes the 64-bit xxHash digest of b. +// +//go:noescape +func Sum64(b []byte) uint64 + +//go:noescape +func writeBlocks(s *Digest, b []byte) int diff --git a/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash_other.go b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash_other.go new file mode 100644 index 0000000..0be16ce --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash_other.go @@ -0,0 +1,76 @@ +//go:build (!amd64 && !arm64) || appengine || !gc || purego || noasm +// +build !amd64,!arm64 appengine !gc purego noasm + +package xxhash + +// Sum64 computes the 64-bit xxHash digest of b. +func Sum64(b []byte) uint64 { + // A simpler version would be + // d := New() + // d.Write(b) + // return d.Sum64() + // but this is faster, particularly for small inputs. + + n := len(b) + var h uint64 + + if n >= 32 { + v1 := primes[0] + prime2 + v2 := prime2 + v3 := uint64(0) + v4 := -primes[0] + for len(b) >= 32 { + v1 = round(v1, u64(b[0:8:len(b)])) + v2 = round(v2, u64(b[8:16:len(b)])) + v3 = round(v3, u64(b[16:24:len(b)])) + v4 = round(v4, u64(b[24:32:len(b)])) + b = b[32:len(b):len(b)] + } + h = rol1(v1) + rol7(v2) + rol12(v3) + rol18(v4) + h = mergeRound(h, v1) + h = mergeRound(h, v2) + h = mergeRound(h, v3) + h = mergeRound(h, v4) + } else { + h = prime5 + } + + h += uint64(n) + + for ; len(b) >= 8; b = b[8:] { + k1 := round(0, u64(b[:8])) + h ^= k1 + h = rol27(h)*prime1 + prime4 + } + if len(b) >= 4 { + h ^= uint64(u32(b[:4])) * prime1 + h = rol23(h)*prime2 + prime3 + b = b[4:] + } + for ; len(b) > 0; b = b[1:] { + h ^= uint64(b[0]) * prime5 + h = rol11(h) * prime1 + } + + h ^= h >> 33 + h *= prime2 + h ^= h >> 29 + h *= prime3 + h ^= h >> 32 + + return h +} + +func writeBlocks(d *Digest, b []byte) int { + v1, v2, v3, v4 := d.v1, d.v2, d.v3, d.v4 + n := len(b) + for len(b) >= 32 { + v1 = round(v1, u64(b[0:8:len(b)])) + v2 = round(v2, u64(b[8:16:len(b)])) + v3 = round(v3, u64(b[16:24:len(b)])) + v4 = round(v4, u64(b[24:32:len(b)])) + b = b[32:len(b):len(b)] + } + d.v1, d.v2, d.v3, d.v4 = v1, v2, v3, v4 + return n - len(b) +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash_safe.go b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash_safe.go new file mode 100644 index 0000000..6f3b0cb --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/internal/xxhash/xxhash_safe.go @@ -0,0 +1,11 @@ +package xxhash + +// Sum64String computes the 64-bit xxHash digest of s. +func Sum64String(s string) uint64 { + return Sum64([]byte(s)) +} + +// WriteString adds more data to d. It always returns len(s), nil. +func (d *Digest) WriteString(s string) (n int, err error) { + return d.Write([]byte(s)) +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/matchlen_amd64.go b/backend/vendor/github.com/klauspost/compress/zstd/matchlen_amd64.go new file mode 100644 index 0000000..f41932b --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/matchlen_amd64.go @@ -0,0 +1,16 @@ +//go:build amd64 && !appengine && !noasm && gc +// +build amd64,!appengine,!noasm,gc + +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. + +package zstd + +// matchLen returns how many bytes match in a and b +// +// It assumes that: +// +// len(a) <= len(b) and len(a) > 0 +// +//go:noescape +func matchLen(a []byte, b []byte) int diff --git a/backend/vendor/github.com/klauspost/compress/zstd/matchlen_amd64.s b/backend/vendor/github.com/klauspost/compress/zstd/matchlen_amd64.s new file mode 100644 index 0000000..0782b86 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/matchlen_amd64.s @@ -0,0 +1,66 @@ +// Copied from S2 implementation. + +//go:build !appengine && !noasm && gc && !noasm + +#include "textflag.h" + +// func matchLen(a []byte, b []byte) int +TEXT ·matchLen(SB), NOSPLIT, $0-56 + MOVQ a_base+0(FP), AX + MOVQ b_base+24(FP), CX + MOVQ a_len+8(FP), DX + + // matchLen + XORL SI, SI + CMPL DX, $0x08 + JB matchlen_match4_standalone + +matchlen_loopback_standalone: + MOVQ (AX)(SI*1), BX + XORQ (CX)(SI*1), BX + JZ matchlen_loop_standalone + +#ifdef GOAMD64_v3 + TZCNTQ BX, BX +#else + BSFQ BX, BX +#endif + SHRL $0x03, BX + LEAL (SI)(BX*1), SI + JMP gen_match_len_end + +matchlen_loop_standalone: + LEAL -8(DX), DX + LEAL 8(SI), SI + CMPL DX, $0x08 + JAE matchlen_loopback_standalone + +matchlen_match4_standalone: + CMPL DX, $0x04 + JB matchlen_match2_standalone + MOVL (AX)(SI*1), BX + CMPL (CX)(SI*1), BX + JNE matchlen_match2_standalone + LEAL -4(DX), DX + LEAL 4(SI), SI + +matchlen_match2_standalone: + CMPL DX, $0x02 + JB matchlen_match1_standalone + MOVW (AX)(SI*1), BX + CMPW (CX)(SI*1), BX + JNE matchlen_match1_standalone + LEAL -2(DX), DX + LEAL 2(SI), SI + +matchlen_match1_standalone: + CMPL DX, $0x01 + JB gen_match_len_end + MOVB (AX)(SI*1), BL + CMPB (CX)(SI*1), BL + JNE gen_match_len_end + INCL SI + +gen_match_len_end: + MOVQ SI, ret+48(FP) + RET diff --git a/backend/vendor/github.com/klauspost/compress/zstd/matchlen_generic.go b/backend/vendor/github.com/klauspost/compress/zstd/matchlen_generic.go new file mode 100644 index 0000000..bea1779 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/matchlen_generic.go @@ -0,0 +1,38 @@ +//go:build !amd64 || appengine || !gc || noasm +// +build !amd64 appengine !gc noasm + +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. + +package zstd + +import ( + "math/bits" + + "github.com/klauspost/compress/internal/le" +) + +// matchLen returns the maximum common prefix length of a and b. +// a must be the shortest of the two. +func matchLen(a, b []byte) (n int) { + left := len(a) + for left >= 8 { + diff := le.Load64(a, n) ^ le.Load64(b, n) + if diff != 0 { + return n + bits.TrailingZeros64(diff)>>3 + } + n += 8 + left -= 8 + } + a = a[n:] + b = b[n:] + + for i := range a { + if a[i] != b[i] { + break + } + n++ + } + return n + +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/seqdec.go b/backend/vendor/github.com/klauspost/compress/zstd/seqdec.go new file mode 100644 index 0000000..0bfb0e4 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/seqdec.go @@ -0,0 +1,500 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "errors" + "fmt" + "io" +) + +type seq struct { + litLen uint32 + matchLen uint32 + offset uint32 + + // Codes are stored here for the encoder + // so they only have to be looked up once. + llCode, mlCode, ofCode uint8 +} + +type seqVals struct { + ll, ml, mo int +} + +func (s seq) String() string { + if s.offset <= 3 { + if s.offset == 0 { + return fmt.Sprint("litLen:", s.litLen, ", matchLen:", s.matchLen+zstdMinMatch, ", offset: INVALID (0)") + } + return fmt.Sprint("litLen:", s.litLen, ", matchLen:", s.matchLen+zstdMinMatch, ", offset:", s.offset, " (repeat)") + } + return fmt.Sprint("litLen:", s.litLen, ", matchLen:", s.matchLen+zstdMinMatch, ", offset:", s.offset-3, " (new)") +} + +type seqCompMode uint8 + +const ( + compModePredefined seqCompMode = iota + compModeRLE + compModeFSE + compModeRepeat +) + +type sequenceDec struct { + // decoder keeps track of the current state and updates it from the bitstream. + fse *fseDecoder + state fseState + repeat bool +} + +// init the state of the decoder with input from stream. +func (s *sequenceDec) init(br *bitReader) error { + if s.fse == nil { + return errors.New("sequence decoder not defined") + } + s.state.init(br, s.fse.actualTableLog, s.fse.dt[:1< cap(s.out) { + addBytes := s.seqSize + len(s.out) + s.out = append(s.out, make([]byte, addBytes)...) + s.out = s.out[:len(s.out)-addBytes] + } + + if debugDecoder { + printf("Execute %d seqs with hist %d, dict %d, literals: %d into %d bytes\n", len(seqs), len(hist), len(s.dict), len(s.literals), s.seqSize) + } + + var t = len(s.out) + out := s.out[:t+s.seqSize] + + for _, seq := range seqs { + // Add literals + copy(out[t:], s.literals[:seq.ll]) + t += seq.ll + s.literals = s.literals[seq.ll:] + + // Copy from dictionary... + if seq.mo > t+len(hist) || seq.mo > s.windowSize { + if len(s.dict) == 0 { + return fmt.Errorf("match offset (%d) bigger than current history (%d)", seq.mo, t+len(hist)) + } + + // we may be in dictionary. + dictO := len(s.dict) - (seq.mo - (t + len(hist))) + if dictO < 0 || dictO >= len(s.dict) { + return fmt.Errorf("match offset (%d) bigger than current history+dict (%d)", seq.mo, t+len(hist)+len(s.dict)) + } + end := dictO + seq.ml + if end > len(s.dict) { + n := len(s.dict) - dictO + copy(out[t:], s.dict[dictO:]) + t += n + seq.ml -= n + } else { + copy(out[t:], s.dict[dictO:end]) + t += end - dictO + continue + } + } + + // Copy from history. + if v := seq.mo - t; v > 0 { + // v is the start position in history from end. + start := len(hist) - v + if seq.ml > v { + // Some goes into current block. + // Copy remainder of history + copy(out[t:], hist[start:]) + t += v + seq.ml -= v + } else { + copy(out[t:], hist[start:start+seq.ml]) + t += seq.ml + continue + } + } + // We must be in current buffer now + if seq.ml > 0 { + start := t - seq.mo + if seq.ml <= t-start { + // No overlap + copy(out[t:], out[start:start+seq.ml]) + t += seq.ml + continue + } else { + // Overlapping copy + // Extend destination slice and copy one byte at the time. + src := out[start : start+seq.ml] + dst := out[t:] + dst = dst[:len(src)] + t += len(src) + // Destination is the space we just added. + for i := range src { + dst[i] = src[i] + } + } + } + } + + // Add final literals + copy(out[t:], s.literals) + if debugDecoder { + t += len(s.literals) + if t != len(out) { + panic(fmt.Errorf("length mismatch, want %d, got %d, ss: %d", len(out), t, s.seqSize)) + } + } + s.out = out + + return nil +} + +// decode sequences from the stream with the provided history. +func (s *sequenceDecs) decodeSync(hist []byte) error { + supported, err := s.decodeSyncSimple(hist) + if supported { + return err + } + + br := s.br + seqs := s.nSeqs + startSize := len(s.out) + // Grab full sizes tables, to avoid bounds checks. + llTable, mlTable, ofTable := s.litLengths.fse.dt[:maxTablesize], s.matchLengths.fse.dt[:maxTablesize], s.offsets.fse.dt[:maxTablesize] + llState, mlState, ofState := s.litLengths.state.state, s.matchLengths.state.state, s.offsets.state.state + out := s.out + maxBlockSize := min(s.windowSize, maxCompressedBlockSize) + + if debugDecoder { + println("decodeSync: decoding", seqs, "sequences", br.remain(), "bits remain on stream") + } + for i := seqs - 1; i >= 0; i-- { + if br.overread() { + printf("reading sequence %d, exceeded available data. Overread by %d\n", seqs-i, -br.remain()) + return io.ErrUnexpectedEOF + } + var ll, mo, ml int + if br.cursor > 4+((maxOffsetBits+16+16)>>3) { + // inlined function: + // ll, mo, ml = s.nextFast(br, llState, mlState, ofState) + + // Final will not read from stream. + var llB, mlB, moB uint8 + ll, llB = llState.final() + ml, mlB = mlState.final() + mo, moB = ofState.final() + + // extra bits are stored in reverse order. + br.fillFast() + mo += br.getBits(moB) + if s.maxBits > 32 { + br.fillFast() + } + ml += br.getBits(mlB) + ll += br.getBits(llB) + + if moB > 1 { + s.prevOffset[2] = s.prevOffset[1] + s.prevOffset[1] = s.prevOffset[0] + s.prevOffset[0] = mo + } else { + // mo = s.adjustOffset(mo, ll, moB) + // Inlined for rather big speedup + if ll == 0 { + // There is an exception though, when current sequence's literals_length = 0. + // In this case, repeated offsets are shifted by one, so an offset_value of 1 means Repeated_Offset2, + // an offset_value of 2 means Repeated_Offset3, and an offset_value of 3 means Repeated_Offset1 - 1_byte. + mo++ + } + + if mo == 0 { + mo = s.prevOffset[0] + } else { + var temp int + if mo == 3 { + temp = s.prevOffset[0] - 1 + } else { + temp = s.prevOffset[mo] + } + + if temp == 0 { + // 0 is not valid; input is corrupted; force offset to 1 + println("WARNING: temp was 0") + temp = 1 + } + + if mo != 1 { + s.prevOffset[2] = s.prevOffset[1] + } + s.prevOffset[1] = s.prevOffset[0] + s.prevOffset[0] = temp + mo = temp + } + } + br.fillFast() + } else { + ll, mo, ml = s.next(br, llState, mlState, ofState) + br.fill() + } + + if debugSequences { + println("Seq", seqs-i-1, "Litlen:", ll, "mo:", mo, "(abs) ml:", ml) + } + + if ll > len(s.literals) { + return fmt.Errorf("unexpected literal count, want %d bytes, but only %d is available", ll, len(s.literals)) + } + size := ll + ml + len(out) + if size-startSize > maxBlockSize { + return fmt.Errorf("output bigger than max block size (%d)", maxBlockSize) + } + if size > cap(out) { + // Not enough size, which can happen under high volume block streaming conditions + // but could be if destination slice is too small for sync operations. + // over-allocating here can create a large amount of GC pressure so we try to keep + // it as contained as possible + used := len(out) - startSize + addBytes := 256 + ll + ml + used>>2 + // Clamp to max block size. + if used+addBytes > maxBlockSize { + addBytes = maxBlockSize - used + } + out = append(out, make([]byte, addBytes)...) + out = out[:len(out)-addBytes] + } + if ml > maxMatchLen { + return fmt.Errorf("match len (%d) bigger than max allowed length", ml) + } + + // Add literals + out = append(out, s.literals[:ll]...) + s.literals = s.literals[ll:] + + if mo == 0 && ml > 0 { + return fmt.Errorf("zero matchoff and matchlen (%d) > 0", ml) + } + + if mo > len(out)+len(hist) || mo > s.windowSize { + if len(s.dict) == 0 { + return fmt.Errorf("match offset (%d) bigger than current history (%d)", mo, len(out)+len(hist)-startSize) + } + + // we may be in dictionary. + dictO := len(s.dict) - (mo - (len(out) + len(hist))) + if dictO < 0 || dictO >= len(s.dict) { + return fmt.Errorf("match offset (%d) bigger than current history (%d)", mo, len(out)+len(hist)-startSize) + } + end := dictO + ml + if end > len(s.dict) { + out = append(out, s.dict[dictO:]...) + ml -= len(s.dict) - dictO + } else { + out = append(out, s.dict[dictO:end]...) + mo = 0 + ml = 0 + } + } + + // Copy from history. + // TODO: Blocks without history could be made to ignore this completely. + if v := mo - len(out); v > 0 { + // v is the start position in history from end. + start := len(hist) - v + if ml > v { + // Some goes into current block. + // Copy remainder of history + out = append(out, hist[start:]...) + ml -= v + } else { + out = append(out, hist[start:start+ml]...) + ml = 0 + } + } + // We must be in current buffer now + if ml > 0 { + start := len(out) - mo + if ml <= len(out)-start { + // No overlap + out = append(out, out[start:start+ml]...) + } else { + // Overlapping copy + // Extend destination slice and copy one byte at the time. + out = out[:len(out)+ml] + src := out[start : start+ml] + // Destination is the space we just added. + dst := out[len(out)-ml:] + dst = dst[:len(src)] + for i := range src { + dst[i] = src[i] + } + } + } + if i == 0 { + // This is the last sequence, so we shouldn't update state. + break + } + + // Manually inlined, ~ 5-20% faster + // Update all 3 states at once. Approx 20% faster. + nBits := llState.nbBits() + mlState.nbBits() + ofState.nbBits() + if nBits == 0 { + llState = llTable[llState.newState()&maxTableMask] + mlState = mlTable[mlState.newState()&maxTableMask] + ofState = ofTable[ofState.newState()&maxTableMask] + } else { + bits := br.get32BitsFast(nBits) + + lowBits := uint16(bits >> ((ofState.nbBits() + mlState.nbBits()) & 31)) + llState = llTable[(llState.newState()+lowBits)&maxTableMask] + + lowBits = uint16(bits >> (ofState.nbBits() & 31)) + lowBits &= bitMask[mlState.nbBits()&15] + mlState = mlTable[(mlState.newState()+lowBits)&maxTableMask] + + lowBits = uint16(bits) & bitMask[ofState.nbBits()&15] + ofState = ofTable[(ofState.newState()+lowBits)&maxTableMask] + } + } + + if size := len(s.literals) + len(out) - startSize; size > maxBlockSize { + return fmt.Errorf("output bigger than max block size (%d)", maxBlockSize) + } + + // Add final literals + s.out = append(out, s.literals...) + return br.close() +} + +var bitMask [16]uint16 + +func init() { + for i := range bitMask[:] { + bitMask[i] = uint16((1 << uint(i)) - 1) + } +} + +func (s *sequenceDecs) next(br *bitReader, llState, mlState, ofState decSymbol) (ll, mo, ml int) { + // Final will not read from stream. + ll, llB := llState.final() + ml, mlB := mlState.final() + mo, moB := ofState.final() + + // extra bits are stored in reverse order. + br.fill() + mo += br.getBits(moB) + if s.maxBits > 32 { + br.fill() + } + // matchlength+literal length, max 32 bits + ml += br.getBits(mlB) + ll += br.getBits(llB) + mo = s.adjustOffset(mo, ll, moB) + return +} + +func (s *sequenceDecs) adjustOffset(offset, litLen int, offsetB uint8) int { + if offsetB > 1 { + s.prevOffset[2] = s.prevOffset[1] + s.prevOffset[1] = s.prevOffset[0] + s.prevOffset[0] = offset + return offset + } + + if litLen == 0 { + // There is an exception though, when current sequence's literals_length = 0. + // In this case, repeated offsets are shifted by one, so an offset_value of 1 means Repeated_Offset2, + // an offset_value of 2 means Repeated_Offset3, and an offset_value of 3 means Repeated_Offset1 - 1_byte. + offset++ + } + + if offset == 0 { + return s.prevOffset[0] + } + var temp int + if offset == 3 { + temp = s.prevOffset[0] - 1 + } else { + temp = s.prevOffset[offset] + } + + if temp == 0 { + // 0 is not valid; input is corrupted; force offset to 1 + println("temp was 0") + temp = 1 + } + + if offset != 1 { + s.prevOffset[2] = s.prevOffset[1] + } + s.prevOffset[1] = s.prevOffset[0] + s.prevOffset[0] = temp + return temp +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/seqdec_amd64.go b/backend/vendor/github.com/klauspost/compress/zstd/seqdec_amd64.go new file mode 100644 index 0000000..1f8c3ce --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/seqdec_amd64.go @@ -0,0 +1,388 @@ +//go:build amd64 && !appengine && !noasm && gc +// +build amd64,!appengine,!noasm,gc + +package zstd + +import ( + "fmt" + "io" + + "github.com/klauspost/compress/internal/cpuinfo" +) + +type decodeSyncAsmContext struct { + llTable []decSymbol + mlTable []decSymbol + ofTable []decSymbol + llState uint64 + mlState uint64 + ofState uint64 + iteration int + litRemain int + out []byte + outPosition int + literals []byte + litPosition int + history []byte + windowSize int + ll int // set on error (not for all errors, please refer to _generate/gen.go) + ml int // set on error (not for all errors, please refer to _generate/gen.go) + mo int // set on error (not for all errors, please refer to _generate/gen.go) +} + +// sequenceDecs_decodeSync_amd64 implements the main loop of sequenceDecs.decodeSync in x86 asm. +// +// Please refer to seqdec_generic.go for the reference implementation. +// +//go:noescape +func sequenceDecs_decodeSync_amd64(s *sequenceDecs, br *bitReader, ctx *decodeSyncAsmContext) int + +// sequenceDecs_decodeSync_bmi2 implements the main loop of sequenceDecs.decodeSync in x86 asm with BMI2 extensions. +// +//go:noescape +func sequenceDecs_decodeSync_bmi2(s *sequenceDecs, br *bitReader, ctx *decodeSyncAsmContext) int + +// sequenceDecs_decodeSync_safe_amd64 does the same as above, but does not write more than output buffer. +// +//go:noescape +func sequenceDecs_decodeSync_safe_amd64(s *sequenceDecs, br *bitReader, ctx *decodeSyncAsmContext) int + +// sequenceDecs_decodeSync_safe_bmi2 does the same as above, but does not write more than output buffer. +// +//go:noescape +func sequenceDecs_decodeSync_safe_bmi2(s *sequenceDecs, br *bitReader, ctx *decodeSyncAsmContext) int + +// decode sequences from the stream with the provided history but without a dictionary. +func (s *sequenceDecs) decodeSyncSimple(hist []byte) (bool, error) { + if len(s.dict) > 0 { + return false, nil + } + if s.maxSyncLen == 0 && cap(s.out)-len(s.out) < maxCompressedBlockSize { + return false, nil + } + + // FIXME: Using unsafe memory copies leads to rare, random crashes + // with fuzz testing. It is therefore disabled for now. + const useSafe = true + /* + useSafe := false + if s.maxSyncLen == 0 && cap(s.out)-len(s.out) < maxCompressedBlockSizeAlloc { + useSafe = true + } + if s.maxSyncLen > 0 && cap(s.out)-len(s.out)-compressedBlockOverAlloc < int(s.maxSyncLen) { + useSafe = true + } + if cap(s.literals) < len(s.literals)+compressedBlockOverAlloc { + useSafe = true + } + */ + + br := s.br + + maxBlockSize := min(s.windowSize, maxCompressedBlockSize) + + ctx := decodeSyncAsmContext{ + llTable: s.litLengths.fse.dt[:maxTablesize], + mlTable: s.matchLengths.fse.dt[:maxTablesize], + ofTable: s.offsets.fse.dt[:maxTablesize], + llState: uint64(s.litLengths.state.state), + mlState: uint64(s.matchLengths.state.state), + ofState: uint64(s.offsets.state.state), + iteration: s.nSeqs - 1, + litRemain: len(s.literals), + out: s.out, + outPosition: len(s.out), + literals: s.literals, + windowSize: s.windowSize, + history: hist, + } + + s.seqSize = 0 + startSize := len(s.out) + + var errCode int + if cpuinfo.HasBMI2() { + if useSafe { + errCode = sequenceDecs_decodeSync_safe_bmi2(s, br, &ctx) + } else { + errCode = sequenceDecs_decodeSync_bmi2(s, br, &ctx) + } + } else { + if useSafe { + errCode = sequenceDecs_decodeSync_safe_amd64(s, br, &ctx) + } else { + errCode = sequenceDecs_decodeSync_amd64(s, br, &ctx) + } + } + switch errCode { + case noError: + break + + case errorMatchLenOfsMismatch: + return true, fmt.Errorf("zero matchoff and matchlen (%d) > 0", ctx.ml) + + case errorMatchLenTooBig: + return true, fmt.Errorf("match len (%d) bigger than max allowed length", ctx.ml) + + case errorMatchOffTooBig: + return true, fmt.Errorf("match offset (%d) bigger than current history (%d)", + ctx.mo, ctx.outPosition+len(hist)-startSize) + + case errorNotEnoughLiterals: + return true, fmt.Errorf("unexpected literal count, want %d bytes, but only %d is available", + ctx.ll, ctx.litRemain+ctx.ll) + + case errorOverread: + return true, io.ErrUnexpectedEOF + + case errorNotEnoughSpace: + size := ctx.outPosition + ctx.ll + ctx.ml + if debugDecoder { + println("msl:", s.maxSyncLen, "cap", cap(s.out), "bef:", startSize, "sz:", size-startSize, "mbs:", maxBlockSize, "outsz:", cap(s.out)-startSize) + } + return true, fmt.Errorf("output bigger than max block size (%d)", maxBlockSize) + + default: + return true, fmt.Errorf("sequenceDecs_decode returned erroneous code %d", errCode) + } + + s.seqSize += ctx.litRemain + if s.seqSize > maxBlockSize { + return true, fmt.Errorf("output bigger than max block size (%d)", maxBlockSize) + } + err := br.close() + if err != nil { + printf("Closing sequences: %v, %+v\n", err, *br) + return true, err + } + + s.literals = s.literals[ctx.litPosition:] + t := ctx.outPosition + s.out = s.out[:t] + + // Add final literals + s.out = append(s.out, s.literals...) + if debugDecoder { + t += len(s.literals) + if t != len(s.out) { + panic(fmt.Errorf("length mismatch, want %d, got %d", len(s.out), t)) + } + } + + return true, nil +} + +// -------------------------------------------------------------------------------- + +type decodeAsmContext struct { + llTable []decSymbol + mlTable []decSymbol + ofTable []decSymbol + llState uint64 + mlState uint64 + ofState uint64 + iteration int + seqs []seqVals + litRemain int +} + +const noError = 0 + +// error reported when mo == 0 && ml > 0 +const errorMatchLenOfsMismatch = 1 + +// error reported when ml > maxMatchLen +const errorMatchLenTooBig = 2 + +// error reported when mo > available history or mo > s.windowSize +const errorMatchOffTooBig = 3 + +// error reported when the sum of literal lengths exeeceds the literal buffer size +const errorNotEnoughLiterals = 4 + +// error reported when capacity of `out` is too small +const errorNotEnoughSpace = 5 + +// error reported when bits are overread. +const errorOverread = 6 + +// sequenceDecs_decode implements the main loop of sequenceDecs in x86 asm. +// +// Please refer to seqdec_generic.go for the reference implementation. +// +//go:noescape +func sequenceDecs_decode_amd64(s *sequenceDecs, br *bitReader, ctx *decodeAsmContext) int + +// sequenceDecs_decode implements the main loop of sequenceDecs in x86 asm. +// +// Please refer to seqdec_generic.go for the reference implementation. +// +//go:noescape +func sequenceDecs_decode_56_amd64(s *sequenceDecs, br *bitReader, ctx *decodeAsmContext) int + +// sequenceDecs_decode implements the main loop of sequenceDecs in x86 asm with BMI2 extensions. +// +//go:noescape +func sequenceDecs_decode_bmi2(s *sequenceDecs, br *bitReader, ctx *decodeAsmContext) int + +// sequenceDecs_decode implements the main loop of sequenceDecs in x86 asm with BMI2 extensions. +// +//go:noescape +func sequenceDecs_decode_56_bmi2(s *sequenceDecs, br *bitReader, ctx *decodeAsmContext) int + +// decode sequences from the stream without the provided history. +func (s *sequenceDecs) decode(seqs []seqVals) error { + br := s.br + + maxBlockSize := min(s.windowSize, maxCompressedBlockSize) + + ctx := decodeAsmContext{ + llTable: s.litLengths.fse.dt[:maxTablesize], + mlTable: s.matchLengths.fse.dt[:maxTablesize], + ofTable: s.offsets.fse.dt[:maxTablesize], + llState: uint64(s.litLengths.state.state), + mlState: uint64(s.matchLengths.state.state), + ofState: uint64(s.offsets.state.state), + seqs: seqs, + iteration: len(seqs) - 1, + litRemain: len(s.literals), + } + + if debugDecoder { + println("decode: decoding", len(seqs), "sequences", br.remain(), "bits remain on stream") + } + + s.seqSize = 0 + lte56bits := s.maxBits+s.offsets.fse.actualTableLog+s.matchLengths.fse.actualTableLog+s.litLengths.fse.actualTableLog <= 56 + var errCode int + if cpuinfo.HasBMI2() { + if lte56bits { + errCode = sequenceDecs_decode_56_bmi2(s, br, &ctx) + } else { + errCode = sequenceDecs_decode_bmi2(s, br, &ctx) + } + } else { + if lte56bits { + errCode = sequenceDecs_decode_56_amd64(s, br, &ctx) + } else { + errCode = sequenceDecs_decode_amd64(s, br, &ctx) + } + } + if errCode != 0 { + i := len(seqs) - ctx.iteration - 1 + switch errCode { + case errorMatchLenOfsMismatch: + ml := ctx.seqs[i].ml + return fmt.Errorf("zero matchoff and matchlen (%d) > 0", ml) + + case errorMatchLenTooBig: + ml := ctx.seqs[i].ml + return fmt.Errorf("match len (%d) bigger than max allowed length", ml) + + case errorNotEnoughLiterals: + ll := ctx.seqs[i].ll + return fmt.Errorf("unexpected literal count, want %d bytes, but only %d is available", ll, ctx.litRemain+ll) + case errorOverread: + return io.ErrUnexpectedEOF + } + + return fmt.Errorf("sequenceDecs_decode_amd64 returned erroneous code %d", errCode) + } + + if ctx.litRemain < 0 { + return fmt.Errorf("literal count is too big: total available %d, total requested %d", + len(s.literals), len(s.literals)-ctx.litRemain) + } + + s.seqSize += ctx.litRemain + if s.seqSize > maxBlockSize { + return fmt.Errorf("output bigger than max block size (%d)", maxBlockSize) + } + if debugDecoder { + println("decode: ", br.remain(), "bits remain on stream. code:", errCode) + } + err := br.close() + if err != nil { + printf("Closing sequences: %v, %+v\n", err, *br) + } + return err +} + +// -------------------------------------------------------------------------------- + +type executeAsmContext struct { + seqs []seqVals + seqIndex int + out []byte + history []byte + literals []byte + outPosition int + litPosition int + windowSize int +} + +// sequenceDecs_executeSimple_amd64 implements the main loop of sequenceDecs.executeSimple in x86 asm. +// +// Returns false if a match offset is too big. +// +// Please refer to seqdec_generic.go for the reference implementation. +// +//go:noescape +func sequenceDecs_executeSimple_amd64(ctx *executeAsmContext) bool + +// Same as above, but with safe memcopies +// +//go:noescape +func sequenceDecs_executeSimple_safe_amd64(ctx *executeAsmContext) bool + +// executeSimple handles cases when dictionary is not used. +func (s *sequenceDecs) executeSimple(seqs []seqVals, hist []byte) error { + // Ensure we have enough output size... + if len(s.out)+s.seqSize+compressedBlockOverAlloc > cap(s.out) { + addBytes := s.seqSize + len(s.out) + compressedBlockOverAlloc + s.out = append(s.out, make([]byte, addBytes)...) + s.out = s.out[:len(s.out)-addBytes] + } + + if debugDecoder { + printf("Execute %d seqs with literals: %d into %d bytes\n", len(seqs), len(s.literals), s.seqSize) + } + + var t = len(s.out) + out := s.out[:t+s.seqSize] + + ctx := executeAsmContext{ + seqs: seqs, + seqIndex: 0, + out: out, + history: hist, + outPosition: t, + litPosition: 0, + literals: s.literals, + windowSize: s.windowSize, + } + var ok bool + if cap(s.literals) < len(s.literals)+compressedBlockOverAlloc { + ok = sequenceDecs_executeSimple_safe_amd64(&ctx) + } else { + ok = sequenceDecs_executeSimple_amd64(&ctx) + } + if !ok { + return fmt.Errorf("match offset (%d) bigger than current history (%d)", + seqs[ctx.seqIndex].mo, ctx.outPosition+len(hist)) + } + s.literals = s.literals[ctx.litPosition:] + t = ctx.outPosition + + // Add final literals + copy(out[t:], s.literals) + if debugDecoder { + t += len(s.literals) + if t != len(out) { + panic(fmt.Errorf("length mismatch, want %d, got %d, ss: %d", len(out), t, s.seqSize)) + } + } + s.out = out + + return nil +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/seqdec_amd64.s b/backend/vendor/github.com/klauspost/compress/zstd/seqdec_amd64.s new file mode 100644 index 0000000..a708ca6 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/seqdec_amd64.s @@ -0,0 +1,4151 @@ +// Code generated by command: go run gen.go -out ../seqdec_amd64.s -pkg=zstd. DO NOT EDIT. + +//go:build !appengine && !noasm && gc && !noasm + +// func sequenceDecs_decode_amd64(s *sequenceDecs, br *bitReader, ctx *decodeAsmContext) int +// Requires: CMOV +TEXT ·sequenceDecs_decode_amd64(SB), $8-32 + MOVQ br+8(FP), CX + MOVQ 24(CX), DX + MOVBQZX 40(CX), BX + MOVQ (CX), AX + MOVQ 32(CX), SI + ADDQ SI, AX + MOVQ AX, (SP) + MOVQ ctx+16(FP), AX + MOVQ 72(AX), DI + MOVQ 80(AX), R8 + MOVQ 88(AX), R9 + MOVQ 104(AX), R10 + MOVQ s+0(FP), AX + MOVQ 144(AX), R11 + MOVQ 152(AX), R12 + MOVQ 160(AX), R13 + +sequenceDecs_decode_amd64_main_loop: + MOVQ (SP), R14 + + // Fill bitreader to have enough for the offset and match length. + CMPQ SI, $0x08 + JL sequenceDecs_decode_amd64_fill_byte_by_byte + MOVQ BX, AX + SHRQ $0x03, AX + SUBQ AX, R14 + MOVQ (R14), DX + SUBQ AX, SI + ANDQ $0x07, BX + JMP sequenceDecs_decode_amd64_fill_end + +sequenceDecs_decode_amd64_fill_byte_by_byte: + CMPQ SI, $0x00 + JLE sequenceDecs_decode_amd64_fill_check_overread + CMPQ BX, $0x07 + JLE sequenceDecs_decode_amd64_fill_end + SHLQ $0x08, DX + SUBQ $0x01, R14 + SUBQ $0x01, SI + SUBQ $0x08, BX + MOVBQZX (R14), AX + ORQ AX, DX + JMP sequenceDecs_decode_amd64_fill_byte_by_byte + +sequenceDecs_decode_amd64_fill_check_overread: + CMPQ BX, $0x40 + JA error_overread + +sequenceDecs_decode_amd64_fill_end: + // Update offset + MOVQ R9, AX + MOVQ BX, CX + MOVQ DX, R15 + SHLQ CL, R15 + MOVB AH, CL + SHRQ $0x20, AX + TESTQ CX, CX + JZ sequenceDecs_decode_amd64_of_update_zero + ADDQ CX, BX + CMPQ BX, $0x40 + JA sequenceDecs_decode_amd64_of_update_zero + CMPQ CX, $0x40 + JAE sequenceDecs_decode_amd64_of_update_zero + NEGQ CX + SHRQ CL, R15 + ADDQ R15, AX + +sequenceDecs_decode_amd64_of_update_zero: + MOVQ AX, 16(R10) + + // Update match length + MOVQ R8, AX + MOVQ BX, CX + MOVQ DX, R15 + SHLQ CL, R15 + MOVB AH, CL + SHRQ $0x20, AX + TESTQ CX, CX + JZ sequenceDecs_decode_amd64_ml_update_zero + ADDQ CX, BX + CMPQ BX, $0x40 + JA sequenceDecs_decode_amd64_ml_update_zero + CMPQ CX, $0x40 + JAE sequenceDecs_decode_amd64_ml_update_zero + NEGQ CX + SHRQ CL, R15 + ADDQ R15, AX + +sequenceDecs_decode_amd64_ml_update_zero: + MOVQ AX, 8(R10) + + // Fill bitreader to have enough for the remaining + CMPQ SI, $0x08 + JL sequenceDecs_decode_amd64_fill_2_byte_by_byte + MOVQ BX, AX + SHRQ $0x03, AX + SUBQ AX, R14 + MOVQ (R14), DX + SUBQ AX, SI + ANDQ $0x07, BX + JMP sequenceDecs_decode_amd64_fill_2_end + +sequenceDecs_decode_amd64_fill_2_byte_by_byte: + CMPQ SI, $0x00 + JLE sequenceDecs_decode_amd64_fill_2_check_overread + CMPQ BX, $0x07 + JLE sequenceDecs_decode_amd64_fill_2_end + SHLQ $0x08, DX + SUBQ $0x01, R14 + SUBQ $0x01, SI + SUBQ $0x08, BX + MOVBQZX (R14), AX + ORQ AX, DX + JMP sequenceDecs_decode_amd64_fill_2_byte_by_byte + +sequenceDecs_decode_amd64_fill_2_check_overread: + CMPQ BX, $0x40 + JA error_overread + +sequenceDecs_decode_amd64_fill_2_end: + // Update literal length + MOVQ DI, AX + MOVQ BX, CX + MOVQ DX, R15 + SHLQ CL, R15 + MOVB AH, CL + SHRQ $0x20, AX + TESTQ CX, CX + JZ sequenceDecs_decode_amd64_ll_update_zero + ADDQ CX, BX + CMPQ BX, $0x40 + JA sequenceDecs_decode_amd64_ll_update_zero + CMPQ CX, $0x40 + JAE sequenceDecs_decode_amd64_ll_update_zero + NEGQ CX + SHRQ CL, R15 + ADDQ R15, AX + +sequenceDecs_decode_amd64_ll_update_zero: + MOVQ AX, (R10) + + // Fill bitreader for state updates + MOVQ R14, (SP) + MOVQ R9, AX + SHRQ $0x08, AX + MOVBQZX AL, AX + MOVQ ctx+16(FP), CX + CMPQ 96(CX), $0x00 + JZ sequenceDecs_decode_amd64_skip_update + + // Update Literal Length State + MOVBQZX DI, R14 + SHRL $0x10, DI + LEAQ (BX)(R14*1), CX + MOVQ DX, R15 + MOVQ CX, BX + ROLQ CL, R15 + MOVL $0x00000001, BP + MOVB R14, CL + SHLL CL, BP + DECL BP + ANDQ BP, R15 + ADDQ R15, DI + + // Load ctx.llTable + MOVQ ctx+16(FP), CX + MOVQ (CX), CX + MOVQ (CX)(DI*8), DI + + // Update Match Length State + MOVBQZX R8, R14 + SHRL $0x10, R8 + LEAQ (BX)(R14*1), CX + MOVQ DX, R15 + MOVQ CX, BX + ROLQ CL, R15 + MOVL $0x00000001, BP + MOVB R14, CL + SHLL CL, BP + DECL BP + ANDQ BP, R15 + ADDQ R15, R8 + + // Load ctx.mlTable + MOVQ ctx+16(FP), CX + MOVQ 24(CX), CX + MOVQ (CX)(R8*8), R8 + + // Update Offset State + MOVBQZX R9, R14 + SHRL $0x10, R9 + LEAQ (BX)(R14*1), CX + MOVQ DX, R15 + MOVQ CX, BX + ROLQ CL, R15 + MOVL $0x00000001, BP + MOVB R14, CL + SHLL CL, BP + DECL BP + ANDQ BP, R15 + ADDQ R15, R9 + + // Load ctx.ofTable + MOVQ ctx+16(FP), CX + MOVQ 48(CX), CX + MOVQ (CX)(R9*8), R9 + +sequenceDecs_decode_amd64_skip_update: + // Adjust offset + MOVQ 16(R10), CX + CMPQ AX, $0x01 + JBE sequenceDecs_decode_amd64_adjust_offsetB_1_or_0 + MOVQ R12, R13 + MOVQ R11, R12 + MOVQ CX, R11 + JMP sequenceDecs_decode_amd64_after_adjust + +sequenceDecs_decode_amd64_adjust_offsetB_1_or_0: + CMPQ (R10), $0x00000000 + JNE sequenceDecs_decode_amd64_adjust_offset_maybezero + INCQ CX + JMP sequenceDecs_decode_amd64_adjust_offset_nonzero + +sequenceDecs_decode_amd64_adjust_offset_maybezero: + TESTQ CX, CX + JNZ sequenceDecs_decode_amd64_adjust_offset_nonzero + MOVQ R11, CX + JMP sequenceDecs_decode_amd64_after_adjust + +sequenceDecs_decode_amd64_adjust_offset_nonzero: + CMPQ CX, $0x01 + JB sequenceDecs_decode_amd64_adjust_zero + JEQ sequenceDecs_decode_amd64_adjust_one + CMPQ CX, $0x02 + JA sequenceDecs_decode_amd64_adjust_three + JMP sequenceDecs_decode_amd64_adjust_two + +sequenceDecs_decode_amd64_adjust_zero: + MOVQ R11, AX + JMP sequenceDecs_decode_amd64_adjust_test_temp_valid + +sequenceDecs_decode_amd64_adjust_one: + MOVQ R12, AX + JMP sequenceDecs_decode_amd64_adjust_test_temp_valid + +sequenceDecs_decode_amd64_adjust_two: + MOVQ R13, AX + JMP sequenceDecs_decode_amd64_adjust_test_temp_valid + +sequenceDecs_decode_amd64_adjust_three: + LEAQ -1(R11), AX + +sequenceDecs_decode_amd64_adjust_test_temp_valid: + TESTQ AX, AX + JNZ sequenceDecs_decode_amd64_adjust_temp_valid + MOVQ $0x00000001, AX + +sequenceDecs_decode_amd64_adjust_temp_valid: + CMPQ CX, $0x01 + CMOVQNE R12, R13 + MOVQ R11, R12 + MOVQ AX, R11 + MOVQ AX, CX + +sequenceDecs_decode_amd64_after_adjust: + MOVQ CX, 16(R10) + + // Check values + MOVQ 8(R10), AX + MOVQ (R10), R14 + LEAQ (AX)(R14*1), R15 + MOVQ s+0(FP), BP + ADDQ R15, 256(BP) + MOVQ ctx+16(FP), R15 + SUBQ R14, 128(R15) + JS error_not_enough_literals + CMPQ AX, $0x00020002 + JA sequenceDecs_decode_amd64_error_match_len_too_big + TESTQ CX, CX + JNZ sequenceDecs_decode_amd64_match_len_ofs_ok + TESTQ AX, AX + JNZ sequenceDecs_decode_amd64_error_match_len_ofs_mismatch + +sequenceDecs_decode_amd64_match_len_ofs_ok: + ADDQ $0x18, R10 + MOVQ ctx+16(FP), AX + DECQ 96(AX) + JNS sequenceDecs_decode_amd64_main_loop + MOVQ s+0(FP), AX + MOVQ R11, 144(AX) + MOVQ R12, 152(AX) + MOVQ R13, 160(AX) + MOVQ br+8(FP), AX + MOVQ DX, 24(AX) + MOVB BL, 40(AX) + MOVQ SI, 32(AX) + + // Return success + MOVQ $0x00000000, ret+24(FP) + RET + + // Return with match length error +sequenceDecs_decode_amd64_error_match_len_ofs_mismatch: + MOVQ $0x00000001, ret+24(FP) + RET + + // Return with match too long error +sequenceDecs_decode_amd64_error_match_len_too_big: + MOVQ $0x00000002, ret+24(FP) + RET + + // Return with match offset too long error + MOVQ $0x00000003, ret+24(FP) + RET + + // Return with not enough literals error +error_not_enough_literals: + MOVQ $0x00000004, ret+24(FP) + RET + + // Return with overread error +error_overread: + MOVQ $0x00000006, ret+24(FP) + RET + +// func sequenceDecs_decode_56_amd64(s *sequenceDecs, br *bitReader, ctx *decodeAsmContext) int +// Requires: CMOV +TEXT ·sequenceDecs_decode_56_amd64(SB), $8-32 + MOVQ br+8(FP), CX + MOVQ 24(CX), DX + MOVBQZX 40(CX), BX + MOVQ (CX), AX + MOVQ 32(CX), SI + ADDQ SI, AX + MOVQ AX, (SP) + MOVQ ctx+16(FP), AX + MOVQ 72(AX), DI + MOVQ 80(AX), R8 + MOVQ 88(AX), R9 + MOVQ 104(AX), R10 + MOVQ s+0(FP), AX + MOVQ 144(AX), R11 + MOVQ 152(AX), R12 + MOVQ 160(AX), R13 + +sequenceDecs_decode_56_amd64_main_loop: + MOVQ (SP), R14 + + // Fill bitreader to have enough for the offset and match length. + CMPQ SI, $0x08 + JL sequenceDecs_decode_56_amd64_fill_byte_by_byte + MOVQ BX, AX + SHRQ $0x03, AX + SUBQ AX, R14 + MOVQ (R14), DX + SUBQ AX, SI + ANDQ $0x07, BX + JMP sequenceDecs_decode_56_amd64_fill_end + +sequenceDecs_decode_56_amd64_fill_byte_by_byte: + CMPQ SI, $0x00 + JLE sequenceDecs_decode_56_amd64_fill_check_overread + CMPQ BX, $0x07 + JLE sequenceDecs_decode_56_amd64_fill_end + SHLQ $0x08, DX + SUBQ $0x01, R14 + SUBQ $0x01, SI + SUBQ $0x08, BX + MOVBQZX (R14), AX + ORQ AX, DX + JMP sequenceDecs_decode_56_amd64_fill_byte_by_byte + +sequenceDecs_decode_56_amd64_fill_check_overread: + CMPQ BX, $0x40 + JA error_overread + +sequenceDecs_decode_56_amd64_fill_end: + // Update offset + MOVQ R9, AX + MOVQ BX, CX + MOVQ DX, R15 + SHLQ CL, R15 + MOVB AH, CL + SHRQ $0x20, AX + TESTQ CX, CX + JZ sequenceDecs_decode_56_amd64_of_update_zero + ADDQ CX, BX + CMPQ BX, $0x40 + JA sequenceDecs_decode_56_amd64_of_update_zero + CMPQ CX, $0x40 + JAE sequenceDecs_decode_56_amd64_of_update_zero + NEGQ CX + SHRQ CL, R15 + ADDQ R15, AX + +sequenceDecs_decode_56_amd64_of_update_zero: + MOVQ AX, 16(R10) + + // Update match length + MOVQ R8, AX + MOVQ BX, CX + MOVQ DX, R15 + SHLQ CL, R15 + MOVB AH, CL + SHRQ $0x20, AX + TESTQ CX, CX + JZ sequenceDecs_decode_56_amd64_ml_update_zero + ADDQ CX, BX + CMPQ BX, $0x40 + JA sequenceDecs_decode_56_amd64_ml_update_zero + CMPQ CX, $0x40 + JAE sequenceDecs_decode_56_amd64_ml_update_zero + NEGQ CX + SHRQ CL, R15 + ADDQ R15, AX + +sequenceDecs_decode_56_amd64_ml_update_zero: + MOVQ AX, 8(R10) + + // Update literal length + MOVQ DI, AX + MOVQ BX, CX + MOVQ DX, R15 + SHLQ CL, R15 + MOVB AH, CL + SHRQ $0x20, AX + TESTQ CX, CX + JZ sequenceDecs_decode_56_amd64_ll_update_zero + ADDQ CX, BX + CMPQ BX, $0x40 + JA sequenceDecs_decode_56_amd64_ll_update_zero + CMPQ CX, $0x40 + JAE sequenceDecs_decode_56_amd64_ll_update_zero + NEGQ CX + SHRQ CL, R15 + ADDQ R15, AX + +sequenceDecs_decode_56_amd64_ll_update_zero: + MOVQ AX, (R10) + + // Fill bitreader for state updates + MOVQ R14, (SP) + MOVQ R9, AX + SHRQ $0x08, AX + MOVBQZX AL, AX + MOVQ ctx+16(FP), CX + CMPQ 96(CX), $0x00 + JZ sequenceDecs_decode_56_amd64_skip_update + + // Update Literal Length State + MOVBQZX DI, R14 + SHRL $0x10, DI + LEAQ (BX)(R14*1), CX + MOVQ DX, R15 + MOVQ CX, BX + ROLQ CL, R15 + MOVL $0x00000001, BP + MOVB R14, CL + SHLL CL, BP + DECL BP + ANDQ BP, R15 + ADDQ R15, DI + + // Load ctx.llTable + MOVQ ctx+16(FP), CX + MOVQ (CX), CX + MOVQ (CX)(DI*8), DI + + // Update Match Length State + MOVBQZX R8, R14 + SHRL $0x10, R8 + LEAQ (BX)(R14*1), CX + MOVQ DX, R15 + MOVQ CX, BX + ROLQ CL, R15 + MOVL $0x00000001, BP + MOVB R14, CL + SHLL CL, BP + DECL BP + ANDQ BP, R15 + ADDQ R15, R8 + + // Load ctx.mlTable + MOVQ ctx+16(FP), CX + MOVQ 24(CX), CX + MOVQ (CX)(R8*8), R8 + + // Update Offset State + MOVBQZX R9, R14 + SHRL $0x10, R9 + LEAQ (BX)(R14*1), CX + MOVQ DX, R15 + MOVQ CX, BX + ROLQ CL, R15 + MOVL $0x00000001, BP + MOVB R14, CL + SHLL CL, BP + DECL BP + ANDQ BP, R15 + ADDQ R15, R9 + + // Load ctx.ofTable + MOVQ ctx+16(FP), CX + MOVQ 48(CX), CX + MOVQ (CX)(R9*8), R9 + +sequenceDecs_decode_56_amd64_skip_update: + // Adjust offset + MOVQ 16(R10), CX + CMPQ AX, $0x01 + JBE sequenceDecs_decode_56_amd64_adjust_offsetB_1_or_0 + MOVQ R12, R13 + MOVQ R11, R12 + MOVQ CX, R11 + JMP sequenceDecs_decode_56_amd64_after_adjust + +sequenceDecs_decode_56_amd64_adjust_offsetB_1_or_0: + CMPQ (R10), $0x00000000 + JNE sequenceDecs_decode_56_amd64_adjust_offset_maybezero + INCQ CX + JMP sequenceDecs_decode_56_amd64_adjust_offset_nonzero + +sequenceDecs_decode_56_amd64_adjust_offset_maybezero: + TESTQ CX, CX + JNZ sequenceDecs_decode_56_amd64_adjust_offset_nonzero + MOVQ R11, CX + JMP sequenceDecs_decode_56_amd64_after_adjust + +sequenceDecs_decode_56_amd64_adjust_offset_nonzero: + CMPQ CX, $0x01 + JB sequenceDecs_decode_56_amd64_adjust_zero + JEQ sequenceDecs_decode_56_amd64_adjust_one + CMPQ CX, $0x02 + JA sequenceDecs_decode_56_amd64_adjust_three + JMP sequenceDecs_decode_56_amd64_adjust_two + +sequenceDecs_decode_56_amd64_adjust_zero: + MOVQ R11, AX + JMP sequenceDecs_decode_56_amd64_adjust_test_temp_valid + +sequenceDecs_decode_56_amd64_adjust_one: + MOVQ R12, AX + JMP sequenceDecs_decode_56_amd64_adjust_test_temp_valid + +sequenceDecs_decode_56_amd64_adjust_two: + MOVQ R13, AX + JMP sequenceDecs_decode_56_amd64_adjust_test_temp_valid + +sequenceDecs_decode_56_amd64_adjust_three: + LEAQ -1(R11), AX + +sequenceDecs_decode_56_amd64_adjust_test_temp_valid: + TESTQ AX, AX + JNZ sequenceDecs_decode_56_amd64_adjust_temp_valid + MOVQ $0x00000001, AX + +sequenceDecs_decode_56_amd64_adjust_temp_valid: + CMPQ CX, $0x01 + CMOVQNE R12, R13 + MOVQ R11, R12 + MOVQ AX, R11 + MOVQ AX, CX + +sequenceDecs_decode_56_amd64_after_adjust: + MOVQ CX, 16(R10) + + // Check values + MOVQ 8(R10), AX + MOVQ (R10), R14 + LEAQ (AX)(R14*1), R15 + MOVQ s+0(FP), BP + ADDQ R15, 256(BP) + MOVQ ctx+16(FP), R15 + SUBQ R14, 128(R15) + JS error_not_enough_literals + CMPQ AX, $0x00020002 + JA sequenceDecs_decode_56_amd64_error_match_len_too_big + TESTQ CX, CX + JNZ sequenceDecs_decode_56_amd64_match_len_ofs_ok + TESTQ AX, AX + JNZ sequenceDecs_decode_56_amd64_error_match_len_ofs_mismatch + +sequenceDecs_decode_56_amd64_match_len_ofs_ok: + ADDQ $0x18, R10 + MOVQ ctx+16(FP), AX + DECQ 96(AX) + JNS sequenceDecs_decode_56_amd64_main_loop + MOVQ s+0(FP), AX + MOVQ R11, 144(AX) + MOVQ R12, 152(AX) + MOVQ R13, 160(AX) + MOVQ br+8(FP), AX + MOVQ DX, 24(AX) + MOVB BL, 40(AX) + MOVQ SI, 32(AX) + + // Return success + MOVQ $0x00000000, ret+24(FP) + RET + + // Return with match length error +sequenceDecs_decode_56_amd64_error_match_len_ofs_mismatch: + MOVQ $0x00000001, ret+24(FP) + RET + + // Return with match too long error +sequenceDecs_decode_56_amd64_error_match_len_too_big: + MOVQ $0x00000002, ret+24(FP) + RET + + // Return with match offset too long error + MOVQ $0x00000003, ret+24(FP) + RET + + // Return with not enough literals error +error_not_enough_literals: + MOVQ $0x00000004, ret+24(FP) + RET + + // Return with overread error +error_overread: + MOVQ $0x00000006, ret+24(FP) + RET + +// func sequenceDecs_decode_bmi2(s *sequenceDecs, br *bitReader, ctx *decodeAsmContext) int +// Requires: BMI, BMI2, CMOV +TEXT ·sequenceDecs_decode_bmi2(SB), $8-32 + MOVQ br+8(FP), BX + MOVQ 24(BX), AX + MOVBQZX 40(BX), DX + MOVQ (BX), CX + MOVQ 32(BX), BX + ADDQ BX, CX + MOVQ CX, (SP) + MOVQ ctx+16(FP), CX + MOVQ 72(CX), SI + MOVQ 80(CX), DI + MOVQ 88(CX), R8 + MOVQ 104(CX), R9 + MOVQ s+0(FP), CX + MOVQ 144(CX), R10 + MOVQ 152(CX), R11 + MOVQ 160(CX), R12 + +sequenceDecs_decode_bmi2_main_loop: + MOVQ (SP), R13 + + // Fill bitreader to have enough for the offset and match length. + CMPQ BX, $0x08 + JL sequenceDecs_decode_bmi2_fill_byte_by_byte + MOVQ DX, CX + SHRQ $0x03, CX + SUBQ CX, R13 + MOVQ (R13), AX + SUBQ CX, BX + ANDQ $0x07, DX + JMP sequenceDecs_decode_bmi2_fill_end + +sequenceDecs_decode_bmi2_fill_byte_by_byte: + CMPQ BX, $0x00 + JLE sequenceDecs_decode_bmi2_fill_check_overread + CMPQ DX, $0x07 + JLE sequenceDecs_decode_bmi2_fill_end + SHLQ $0x08, AX + SUBQ $0x01, R13 + SUBQ $0x01, BX + SUBQ $0x08, DX + MOVBQZX (R13), CX + ORQ CX, AX + JMP sequenceDecs_decode_bmi2_fill_byte_by_byte + +sequenceDecs_decode_bmi2_fill_check_overread: + CMPQ DX, $0x40 + JA error_overread + +sequenceDecs_decode_bmi2_fill_end: + // Update offset + MOVQ $0x00000808, CX + BEXTRQ CX, R8, R14 + MOVQ AX, R15 + LEAQ (DX)(R14*1), CX + ROLQ CL, R15 + BZHIQ R14, R15, R15 + MOVQ CX, DX + MOVQ R8, CX + SHRQ $0x20, CX + ADDQ R15, CX + MOVQ CX, 16(R9) + + // Update match length + MOVQ $0x00000808, CX + BEXTRQ CX, DI, R14 + MOVQ AX, R15 + LEAQ (DX)(R14*1), CX + ROLQ CL, R15 + BZHIQ R14, R15, R15 + MOVQ CX, DX + MOVQ DI, CX + SHRQ $0x20, CX + ADDQ R15, CX + MOVQ CX, 8(R9) + + // Fill bitreader to have enough for the remaining + CMPQ BX, $0x08 + JL sequenceDecs_decode_bmi2_fill_2_byte_by_byte + MOVQ DX, CX + SHRQ $0x03, CX + SUBQ CX, R13 + MOVQ (R13), AX + SUBQ CX, BX + ANDQ $0x07, DX + JMP sequenceDecs_decode_bmi2_fill_2_end + +sequenceDecs_decode_bmi2_fill_2_byte_by_byte: + CMPQ BX, $0x00 + JLE sequenceDecs_decode_bmi2_fill_2_check_overread + CMPQ DX, $0x07 + JLE sequenceDecs_decode_bmi2_fill_2_end + SHLQ $0x08, AX + SUBQ $0x01, R13 + SUBQ $0x01, BX + SUBQ $0x08, DX + MOVBQZX (R13), CX + ORQ CX, AX + JMP sequenceDecs_decode_bmi2_fill_2_byte_by_byte + +sequenceDecs_decode_bmi2_fill_2_check_overread: + CMPQ DX, $0x40 + JA error_overread + +sequenceDecs_decode_bmi2_fill_2_end: + // Update literal length + MOVQ $0x00000808, CX + BEXTRQ CX, SI, R14 + MOVQ AX, R15 + LEAQ (DX)(R14*1), CX + ROLQ CL, R15 + BZHIQ R14, R15, R15 + MOVQ CX, DX + MOVQ SI, CX + SHRQ $0x20, CX + ADDQ R15, CX + MOVQ CX, (R9) + + // Fill bitreader for state updates + MOVQ R13, (SP) + MOVQ $0x00000808, CX + BEXTRQ CX, R8, R13 + MOVQ ctx+16(FP), CX + CMPQ 96(CX), $0x00 + JZ sequenceDecs_decode_bmi2_skip_update + LEAQ (SI)(DI*1), R14 + ADDQ R8, R14 + MOVBQZX R14, R14 + LEAQ (DX)(R14*1), CX + MOVQ AX, R15 + MOVQ CX, DX + ROLQ CL, R15 + BZHIQ R14, R15, R15 + + // Update Offset State + BZHIQ R8, R15, CX + SHRXQ R8, R15, R15 + SHRL $0x10, R8 + ADDQ CX, R8 + + // Load ctx.ofTable + MOVQ ctx+16(FP), CX + MOVQ 48(CX), CX + MOVQ (CX)(R8*8), R8 + + // Update Match Length State + BZHIQ DI, R15, CX + SHRXQ DI, R15, R15 + SHRL $0x10, DI + ADDQ CX, DI + + // Load ctx.mlTable + MOVQ ctx+16(FP), CX + MOVQ 24(CX), CX + MOVQ (CX)(DI*8), DI + + // Update Literal Length State + BZHIQ SI, R15, CX + SHRL $0x10, SI + ADDQ CX, SI + + // Load ctx.llTable + MOVQ ctx+16(FP), CX + MOVQ (CX), CX + MOVQ (CX)(SI*8), SI + +sequenceDecs_decode_bmi2_skip_update: + // Adjust offset + MOVQ 16(R9), CX + CMPQ R13, $0x01 + JBE sequenceDecs_decode_bmi2_adjust_offsetB_1_or_0 + MOVQ R11, R12 + MOVQ R10, R11 + MOVQ CX, R10 + JMP sequenceDecs_decode_bmi2_after_adjust + +sequenceDecs_decode_bmi2_adjust_offsetB_1_or_0: + CMPQ (R9), $0x00000000 + JNE sequenceDecs_decode_bmi2_adjust_offset_maybezero + INCQ CX + JMP sequenceDecs_decode_bmi2_adjust_offset_nonzero + +sequenceDecs_decode_bmi2_adjust_offset_maybezero: + TESTQ CX, CX + JNZ sequenceDecs_decode_bmi2_adjust_offset_nonzero + MOVQ R10, CX + JMP sequenceDecs_decode_bmi2_after_adjust + +sequenceDecs_decode_bmi2_adjust_offset_nonzero: + CMPQ CX, $0x01 + JB sequenceDecs_decode_bmi2_adjust_zero + JEQ sequenceDecs_decode_bmi2_adjust_one + CMPQ CX, $0x02 + JA sequenceDecs_decode_bmi2_adjust_three + JMP sequenceDecs_decode_bmi2_adjust_two + +sequenceDecs_decode_bmi2_adjust_zero: + MOVQ R10, R13 + JMP sequenceDecs_decode_bmi2_adjust_test_temp_valid + +sequenceDecs_decode_bmi2_adjust_one: + MOVQ R11, R13 + JMP sequenceDecs_decode_bmi2_adjust_test_temp_valid + +sequenceDecs_decode_bmi2_adjust_two: + MOVQ R12, R13 + JMP sequenceDecs_decode_bmi2_adjust_test_temp_valid + +sequenceDecs_decode_bmi2_adjust_three: + LEAQ -1(R10), R13 + +sequenceDecs_decode_bmi2_adjust_test_temp_valid: + TESTQ R13, R13 + JNZ sequenceDecs_decode_bmi2_adjust_temp_valid + MOVQ $0x00000001, R13 + +sequenceDecs_decode_bmi2_adjust_temp_valid: + CMPQ CX, $0x01 + CMOVQNE R11, R12 + MOVQ R10, R11 + MOVQ R13, R10 + MOVQ R13, CX + +sequenceDecs_decode_bmi2_after_adjust: + MOVQ CX, 16(R9) + + // Check values + MOVQ 8(R9), R13 + MOVQ (R9), R14 + LEAQ (R13)(R14*1), R15 + MOVQ s+0(FP), BP + ADDQ R15, 256(BP) + MOVQ ctx+16(FP), R15 + SUBQ R14, 128(R15) + JS error_not_enough_literals + CMPQ R13, $0x00020002 + JA sequenceDecs_decode_bmi2_error_match_len_too_big + TESTQ CX, CX + JNZ sequenceDecs_decode_bmi2_match_len_ofs_ok + TESTQ R13, R13 + JNZ sequenceDecs_decode_bmi2_error_match_len_ofs_mismatch + +sequenceDecs_decode_bmi2_match_len_ofs_ok: + ADDQ $0x18, R9 + MOVQ ctx+16(FP), CX + DECQ 96(CX) + JNS sequenceDecs_decode_bmi2_main_loop + MOVQ s+0(FP), CX + MOVQ R10, 144(CX) + MOVQ R11, 152(CX) + MOVQ R12, 160(CX) + MOVQ br+8(FP), CX + MOVQ AX, 24(CX) + MOVB DL, 40(CX) + MOVQ BX, 32(CX) + + // Return success + MOVQ $0x00000000, ret+24(FP) + RET + + // Return with match length error +sequenceDecs_decode_bmi2_error_match_len_ofs_mismatch: + MOVQ $0x00000001, ret+24(FP) + RET + + // Return with match too long error +sequenceDecs_decode_bmi2_error_match_len_too_big: + MOVQ $0x00000002, ret+24(FP) + RET + + // Return with match offset too long error + MOVQ $0x00000003, ret+24(FP) + RET + + // Return with not enough literals error +error_not_enough_literals: + MOVQ $0x00000004, ret+24(FP) + RET + + // Return with overread error +error_overread: + MOVQ $0x00000006, ret+24(FP) + RET + +// func sequenceDecs_decode_56_bmi2(s *sequenceDecs, br *bitReader, ctx *decodeAsmContext) int +// Requires: BMI, BMI2, CMOV +TEXT ·sequenceDecs_decode_56_bmi2(SB), $8-32 + MOVQ br+8(FP), BX + MOVQ 24(BX), AX + MOVBQZX 40(BX), DX + MOVQ (BX), CX + MOVQ 32(BX), BX + ADDQ BX, CX + MOVQ CX, (SP) + MOVQ ctx+16(FP), CX + MOVQ 72(CX), SI + MOVQ 80(CX), DI + MOVQ 88(CX), R8 + MOVQ 104(CX), R9 + MOVQ s+0(FP), CX + MOVQ 144(CX), R10 + MOVQ 152(CX), R11 + MOVQ 160(CX), R12 + +sequenceDecs_decode_56_bmi2_main_loop: + MOVQ (SP), R13 + + // Fill bitreader to have enough for the offset and match length. + CMPQ BX, $0x08 + JL sequenceDecs_decode_56_bmi2_fill_byte_by_byte + MOVQ DX, CX + SHRQ $0x03, CX + SUBQ CX, R13 + MOVQ (R13), AX + SUBQ CX, BX + ANDQ $0x07, DX + JMP sequenceDecs_decode_56_bmi2_fill_end + +sequenceDecs_decode_56_bmi2_fill_byte_by_byte: + CMPQ BX, $0x00 + JLE sequenceDecs_decode_56_bmi2_fill_check_overread + CMPQ DX, $0x07 + JLE sequenceDecs_decode_56_bmi2_fill_end + SHLQ $0x08, AX + SUBQ $0x01, R13 + SUBQ $0x01, BX + SUBQ $0x08, DX + MOVBQZX (R13), CX + ORQ CX, AX + JMP sequenceDecs_decode_56_bmi2_fill_byte_by_byte + +sequenceDecs_decode_56_bmi2_fill_check_overread: + CMPQ DX, $0x40 + JA error_overread + +sequenceDecs_decode_56_bmi2_fill_end: + // Update offset + MOVQ $0x00000808, CX + BEXTRQ CX, R8, R14 + MOVQ AX, R15 + LEAQ (DX)(R14*1), CX + ROLQ CL, R15 + BZHIQ R14, R15, R15 + MOVQ CX, DX + MOVQ R8, CX + SHRQ $0x20, CX + ADDQ R15, CX + MOVQ CX, 16(R9) + + // Update match length + MOVQ $0x00000808, CX + BEXTRQ CX, DI, R14 + MOVQ AX, R15 + LEAQ (DX)(R14*1), CX + ROLQ CL, R15 + BZHIQ R14, R15, R15 + MOVQ CX, DX + MOVQ DI, CX + SHRQ $0x20, CX + ADDQ R15, CX + MOVQ CX, 8(R9) + + // Update literal length + MOVQ $0x00000808, CX + BEXTRQ CX, SI, R14 + MOVQ AX, R15 + LEAQ (DX)(R14*1), CX + ROLQ CL, R15 + BZHIQ R14, R15, R15 + MOVQ CX, DX + MOVQ SI, CX + SHRQ $0x20, CX + ADDQ R15, CX + MOVQ CX, (R9) + + // Fill bitreader for state updates + MOVQ R13, (SP) + MOVQ $0x00000808, CX + BEXTRQ CX, R8, R13 + MOVQ ctx+16(FP), CX + CMPQ 96(CX), $0x00 + JZ sequenceDecs_decode_56_bmi2_skip_update + LEAQ (SI)(DI*1), R14 + ADDQ R8, R14 + MOVBQZX R14, R14 + LEAQ (DX)(R14*1), CX + MOVQ AX, R15 + MOVQ CX, DX + ROLQ CL, R15 + BZHIQ R14, R15, R15 + + // Update Offset State + BZHIQ R8, R15, CX + SHRXQ R8, R15, R15 + SHRL $0x10, R8 + ADDQ CX, R8 + + // Load ctx.ofTable + MOVQ ctx+16(FP), CX + MOVQ 48(CX), CX + MOVQ (CX)(R8*8), R8 + + // Update Match Length State + BZHIQ DI, R15, CX + SHRXQ DI, R15, R15 + SHRL $0x10, DI + ADDQ CX, DI + + // Load ctx.mlTable + MOVQ ctx+16(FP), CX + MOVQ 24(CX), CX + MOVQ (CX)(DI*8), DI + + // Update Literal Length State + BZHIQ SI, R15, CX + SHRL $0x10, SI + ADDQ CX, SI + + // Load ctx.llTable + MOVQ ctx+16(FP), CX + MOVQ (CX), CX + MOVQ (CX)(SI*8), SI + +sequenceDecs_decode_56_bmi2_skip_update: + // Adjust offset + MOVQ 16(R9), CX + CMPQ R13, $0x01 + JBE sequenceDecs_decode_56_bmi2_adjust_offsetB_1_or_0 + MOVQ R11, R12 + MOVQ R10, R11 + MOVQ CX, R10 + JMP sequenceDecs_decode_56_bmi2_after_adjust + +sequenceDecs_decode_56_bmi2_adjust_offsetB_1_or_0: + CMPQ (R9), $0x00000000 + JNE sequenceDecs_decode_56_bmi2_adjust_offset_maybezero + INCQ CX + JMP sequenceDecs_decode_56_bmi2_adjust_offset_nonzero + +sequenceDecs_decode_56_bmi2_adjust_offset_maybezero: + TESTQ CX, CX + JNZ sequenceDecs_decode_56_bmi2_adjust_offset_nonzero + MOVQ R10, CX + JMP sequenceDecs_decode_56_bmi2_after_adjust + +sequenceDecs_decode_56_bmi2_adjust_offset_nonzero: + CMPQ CX, $0x01 + JB sequenceDecs_decode_56_bmi2_adjust_zero + JEQ sequenceDecs_decode_56_bmi2_adjust_one + CMPQ CX, $0x02 + JA sequenceDecs_decode_56_bmi2_adjust_three + JMP sequenceDecs_decode_56_bmi2_adjust_two + +sequenceDecs_decode_56_bmi2_adjust_zero: + MOVQ R10, R13 + JMP sequenceDecs_decode_56_bmi2_adjust_test_temp_valid + +sequenceDecs_decode_56_bmi2_adjust_one: + MOVQ R11, R13 + JMP sequenceDecs_decode_56_bmi2_adjust_test_temp_valid + +sequenceDecs_decode_56_bmi2_adjust_two: + MOVQ R12, R13 + JMP sequenceDecs_decode_56_bmi2_adjust_test_temp_valid + +sequenceDecs_decode_56_bmi2_adjust_three: + LEAQ -1(R10), R13 + +sequenceDecs_decode_56_bmi2_adjust_test_temp_valid: + TESTQ R13, R13 + JNZ sequenceDecs_decode_56_bmi2_adjust_temp_valid + MOVQ $0x00000001, R13 + +sequenceDecs_decode_56_bmi2_adjust_temp_valid: + CMPQ CX, $0x01 + CMOVQNE R11, R12 + MOVQ R10, R11 + MOVQ R13, R10 + MOVQ R13, CX + +sequenceDecs_decode_56_bmi2_after_adjust: + MOVQ CX, 16(R9) + + // Check values + MOVQ 8(R9), R13 + MOVQ (R9), R14 + LEAQ (R13)(R14*1), R15 + MOVQ s+0(FP), BP + ADDQ R15, 256(BP) + MOVQ ctx+16(FP), R15 + SUBQ R14, 128(R15) + JS error_not_enough_literals + CMPQ R13, $0x00020002 + JA sequenceDecs_decode_56_bmi2_error_match_len_too_big + TESTQ CX, CX + JNZ sequenceDecs_decode_56_bmi2_match_len_ofs_ok + TESTQ R13, R13 + JNZ sequenceDecs_decode_56_bmi2_error_match_len_ofs_mismatch + +sequenceDecs_decode_56_bmi2_match_len_ofs_ok: + ADDQ $0x18, R9 + MOVQ ctx+16(FP), CX + DECQ 96(CX) + JNS sequenceDecs_decode_56_bmi2_main_loop + MOVQ s+0(FP), CX + MOVQ R10, 144(CX) + MOVQ R11, 152(CX) + MOVQ R12, 160(CX) + MOVQ br+8(FP), CX + MOVQ AX, 24(CX) + MOVB DL, 40(CX) + MOVQ BX, 32(CX) + + // Return success + MOVQ $0x00000000, ret+24(FP) + RET + + // Return with match length error +sequenceDecs_decode_56_bmi2_error_match_len_ofs_mismatch: + MOVQ $0x00000001, ret+24(FP) + RET + + // Return with match too long error +sequenceDecs_decode_56_bmi2_error_match_len_too_big: + MOVQ $0x00000002, ret+24(FP) + RET + + // Return with match offset too long error + MOVQ $0x00000003, ret+24(FP) + RET + + // Return with not enough literals error +error_not_enough_literals: + MOVQ $0x00000004, ret+24(FP) + RET + + // Return with overread error +error_overread: + MOVQ $0x00000006, ret+24(FP) + RET + +// func sequenceDecs_executeSimple_amd64(ctx *executeAsmContext) bool +// Requires: SSE +TEXT ·sequenceDecs_executeSimple_amd64(SB), $8-9 + MOVQ ctx+0(FP), R10 + MOVQ 8(R10), CX + TESTQ CX, CX + JZ empty_seqs + MOVQ (R10), AX + MOVQ 24(R10), DX + MOVQ 32(R10), BX + MOVQ 80(R10), SI + MOVQ 104(R10), DI + MOVQ 120(R10), R8 + MOVQ 56(R10), R9 + MOVQ 64(R10), R10 + ADDQ R10, R9 + + // seqsBase += 24 * seqIndex + LEAQ (DX)(DX*2), R11 + SHLQ $0x03, R11 + ADDQ R11, AX + + // outBase += outPosition + ADDQ DI, BX + +main_loop: + MOVQ (AX), R11 + MOVQ 16(AX), R12 + MOVQ 8(AX), R13 + + // Copy literals + TESTQ R11, R11 + JZ check_offset + XORQ R14, R14 + +copy_1: + MOVUPS (SI)(R14*1), X0 + MOVUPS X0, (BX)(R14*1) + ADDQ $0x10, R14 + CMPQ R14, R11 + JB copy_1 + ADDQ R11, SI + ADDQ R11, BX + ADDQ R11, DI + + // Malformed input if seq.mo > t+len(hist) || seq.mo > s.windowSize) +check_offset: + LEAQ (DI)(R10*1), R11 + CMPQ R12, R11 + JG error_match_off_too_big + CMPQ R12, R8 + JG error_match_off_too_big + + // Copy match from history + MOVQ R12, R11 + SUBQ DI, R11 + JLS copy_match + MOVQ R9, R14 + SUBQ R11, R14 + CMPQ R13, R11 + JG copy_all_from_history + MOVQ R13, R11 + SUBQ $0x10, R11 + JB copy_4_small + +copy_4_loop: + MOVUPS (R14), X0 + MOVUPS X0, (BX) + ADDQ $0x10, R14 + ADDQ $0x10, BX + SUBQ $0x10, R11 + JAE copy_4_loop + LEAQ 16(R14)(R11*1), R14 + LEAQ 16(BX)(R11*1), BX + MOVUPS -16(R14), X0 + MOVUPS X0, -16(BX) + JMP copy_4_end + +copy_4_small: + CMPQ R13, $0x03 + JE copy_4_move_3 + CMPQ R13, $0x08 + JB copy_4_move_4through7 + JMP copy_4_move_8through16 + +copy_4_move_3: + MOVW (R14), R11 + MOVB 2(R14), R12 + MOVW R11, (BX) + MOVB R12, 2(BX) + ADDQ R13, R14 + ADDQ R13, BX + JMP copy_4_end + +copy_4_move_4through7: + MOVL (R14), R11 + MOVL -4(R14)(R13*1), R12 + MOVL R11, (BX) + MOVL R12, -4(BX)(R13*1) + ADDQ R13, R14 + ADDQ R13, BX + JMP copy_4_end + +copy_4_move_8through16: + MOVQ (R14), R11 + MOVQ -8(R14)(R13*1), R12 + MOVQ R11, (BX) + MOVQ R12, -8(BX)(R13*1) + ADDQ R13, R14 + ADDQ R13, BX + +copy_4_end: + ADDQ R13, DI + ADDQ $0x18, AX + INCQ DX + CMPQ DX, CX + JB main_loop + JMP loop_finished + +copy_all_from_history: + MOVQ R11, R15 + SUBQ $0x10, R15 + JB copy_5_small + +copy_5_loop: + MOVUPS (R14), X0 + MOVUPS X0, (BX) + ADDQ $0x10, R14 + ADDQ $0x10, BX + SUBQ $0x10, R15 + JAE copy_5_loop + LEAQ 16(R14)(R15*1), R14 + LEAQ 16(BX)(R15*1), BX + MOVUPS -16(R14), X0 + MOVUPS X0, -16(BX) + JMP copy_5_end + +copy_5_small: + CMPQ R11, $0x03 + JE copy_5_move_3 + JB copy_5_move_1or2 + CMPQ R11, $0x08 + JB copy_5_move_4through7 + JMP copy_5_move_8through16 + +copy_5_move_1or2: + MOVB (R14), R15 + MOVB -1(R14)(R11*1), BP + MOVB R15, (BX) + MOVB BP, -1(BX)(R11*1) + ADDQ R11, R14 + ADDQ R11, BX + JMP copy_5_end + +copy_5_move_3: + MOVW (R14), R15 + MOVB 2(R14), BP + MOVW R15, (BX) + MOVB BP, 2(BX) + ADDQ R11, R14 + ADDQ R11, BX + JMP copy_5_end + +copy_5_move_4through7: + MOVL (R14), R15 + MOVL -4(R14)(R11*1), BP + MOVL R15, (BX) + MOVL BP, -4(BX)(R11*1) + ADDQ R11, R14 + ADDQ R11, BX + JMP copy_5_end + +copy_5_move_8through16: + MOVQ (R14), R15 + MOVQ -8(R14)(R11*1), BP + MOVQ R15, (BX) + MOVQ BP, -8(BX)(R11*1) + ADDQ R11, R14 + ADDQ R11, BX + +copy_5_end: + ADDQ R11, DI + SUBQ R11, R13 + + // Copy match from the current buffer +copy_match: + MOVQ BX, R11 + SUBQ R12, R11 + + // ml <= mo + CMPQ R13, R12 + JA copy_overlapping_match + + // Copy non-overlapping match + ADDQ R13, DI + MOVQ BX, R12 + ADDQ R13, BX + +copy_2: + MOVUPS (R11), X0 + MOVUPS X0, (R12) + ADDQ $0x10, R11 + ADDQ $0x10, R12 + SUBQ $0x10, R13 + JHI copy_2 + JMP handle_loop + + // Copy overlapping match +copy_overlapping_match: + ADDQ R13, DI + +copy_slow_3: + MOVB (R11), R12 + MOVB R12, (BX) + INCQ R11 + INCQ BX + DECQ R13 + JNZ copy_slow_3 + +handle_loop: + ADDQ $0x18, AX + INCQ DX + CMPQ DX, CX + JB main_loop + +loop_finished: + // Return value + MOVB $0x01, ret+8(FP) + + // Update the context + MOVQ ctx+0(FP), AX + MOVQ DX, 24(AX) + MOVQ DI, 104(AX) + SUBQ 80(AX), SI + MOVQ SI, 112(AX) + RET + +error_match_off_too_big: + // Return value + MOVB $0x00, ret+8(FP) + + // Update the context + MOVQ ctx+0(FP), AX + MOVQ DX, 24(AX) + MOVQ DI, 104(AX) + SUBQ 80(AX), SI + MOVQ SI, 112(AX) + RET + +empty_seqs: + // Return value + MOVB $0x01, ret+8(FP) + RET + +// func sequenceDecs_executeSimple_safe_amd64(ctx *executeAsmContext) bool +// Requires: SSE +TEXT ·sequenceDecs_executeSimple_safe_amd64(SB), $8-9 + MOVQ ctx+0(FP), R10 + MOVQ 8(R10), CX + TESTQ CX, CX + JZ empty_seqs + MOVQ (R10), AX + MOVQ 24(R10), DX + MOVQ 32(R10), BX + MOVQ 80(R10), SI + MOVQ 104(R10), DI + MOVQ 120(R10), R8 + MOVQ 56(R10), R9 + MOVQ 64(R10), R10 + ADDQ R10, R9 + + // seqsBase += 24 * seqIndex + LEAQ (DX)(DX*2), R11 + SHLQ $0x03, R11 + ADDQ R11, AX + + // outBase += outPosition + ADDQ DI, BX + +main_loop: + MOVQ (AX), R11 + MOVQ 16(AX), R12 + MOVQ 8(AX), R13 + + // Copy literals + TESTQ R11, R11 + JZ check_offset + MOVQ R11, R14 + SUBQ $0x10, R14 + JB copy_1_small + +copy_1_loop: + MOVUPS (SI), X0 + MOVUPS X0, (BX) + ADDQ $0x10, SI + ADDQ $0x10, BX + SUBQ $0x10, R14 + JAE copy_1_loop + LEAQ 16(SI)(R14*1), SI + LEAQ 16(BX)(R14*1), BX + MOVUPS -16(SI), X0 + MOVUPS X0, -16(BX) + JMP copy_1_end + +copy_1_small: + CMPQ R11, $0x03 + JE copy_1_move_3 + JB copy_1_move_1or2 + CMPQ R11, $0x08 + JB copy_1_move_4through7 + JMP copy_1_move_8through16 + +copy_1_move_1or2: + MOVB (SI), R14 + MOVB -1(SI)(R11*1), R15 + MOVB R14, (BX) + MOVB R15, -1(BX)(R11*1) + ADDQ R11, SI + ADDQ R11, BX + JMP copy_1_end + +copy_1_move_3: + MOVW (SI), R14 + MOVB 2(SI), R15 + MOVW R14, (BX) + MOVB R15, 2(BX) + ADDQ R11, SI + ADDQ R11, BX + JMP copy_1_end + +copy_1_move_4through7: + MOVL (SI), R14 + MOVL -4(SI)(R11*1), R15 + MOVL R14, (BX) + MOVL R15, -4(BX)(R11*1) + ADDQ R11, SI + ADDQ R11, BX + JMP copy_1_end + +copy_1_move_8through16: + MOVQ (SI), R14 + MOVQ -8(SI)(R11*1), R15 + MOVQ R14, (BX) + MOVQ R15, -8(BX)(R11*1) + ADDQ R11, SI + ADDQ R11, BX + +copy_1_end: + ADDQ R11, DI + + // Malformed input if seq.mo > t+len(hist) || seq.mo > s.windowSize) +check_offset: + LEAQ (DI)(R10*1), R11 + CMPQ R12, R11 + JG error_match_off_too_big + CMPQ R12, R8 + JG error_match_off_too_big + + // Copy match from history + MOVQ R12, R11 + SUBQ DI, R11 + JLS copy_match + MOVQ R9, R14 + SUBQ R11, R14 + CMPQ R13, R11 + JG copy_all_from_history + MOVQ R13, R11 + SUBQ $0x10, R11 + JB copy_4_small + +copy_4_loop: + MOVUPS (R14), X0 + MOVUPS X0, (BX) + ADDQ $0x10, R14 + ADDQ $0x10, BX + SUBQ $0x10, R11 + JAE copy_4_loop + LEAQ 16(R14)(R11*1), R14 + LEAQ 16(BX)(R11*1), BX + MOVUPS -16(R14), X0 + MOVUPS X0, -16(BX) + JMP copy_4_end + +copy_4_small: + CMPQ R13, $0x03 + JE copy_4_move_3 + CMPQ R13, $0x08 + JB copy_4_move_4through7 + JMP copy_4_move_8through16 + +copy_4_move_3: + MOVW (R14), R11 + MOVB 2(R14), R12 + MOVW R11, (BX) + MOVB R12, 2(BX) + ADDQ R13, R14 + ADDQ R13, BX + JMP copy_4_end + +copy_4_move_4through7: + MOVL (R14), R11 + MOVL -4(R14)(R13*1), R12 + MOVL R11, (BX) + MOVL R12, -4(BX)(R13*1) + ADDQ R13, R14 + ADDQ R13, BX + JMP copy_4_end + +copy_4_move_8through16: + MOVQ (R14), R11 + MOVQ -8(R14)(R13*1), R12 + MOVQ R11, (BX) + MOVQ R12, -8(BX)(R13*1) + ADDQ R13, R14 + ADDQ R13, BX + +copy_4_end: + ADDQ R13, DI + ADDQ $0x18, AX + INCQ DX + CMPQ DX, CX + JB main_loop + JMP loop_finished + +copy_all_from_history: + MOVQ R11, R15 + SUBQ $0x10, R15 + JB copy_5_small + +copy_5_loop: + MOVUPS (R14), X0 + MOVUPS X0, (BX) + ADDQ $0x10, R14 + ADDQ $0x10, BX + SUBQ $0x10, R15 + JAE copy_5_loop + LEAQ 16(R14)(R15*1), R14 + LEAQ 16(BX)(R15*1), BX + MOVUPS -16(R14), X0 + MOVUPS X0, -16(BX) + JMP copy_5_end + +copy_5_small: + CMPQ R11, $0x03 + JE copy_5_move_3 + JB copy_5_move_1or2 + CMPQ R11, $0x08 + JB copy_5_move_4through7 + JMP copy_5_move_8through16 + +copy_5_move_1or2: + MOVB (R14), R15 + MOVB -1(R14)(R11*1), BP + MOVB R15, (BX) + MOVB BP, -1(BX)(R11*1) + ADDQ R11, R14 + ADDQ R11, BX + JMP copy_5_end + +copy_5_move_3: + MOVW (R14), R15 + MOVB 2(R14), BP + MOVW R15, (BX) + MOVB BP, 2(BX) + ADDQ R11, R14 + ADDQ R11, BX + JMP copy_5_end + +copy_5_move_4through7: + MOVL (R14), R15 + MOVL -4(R14)(R11*1), BP + MOVL R15, (BX) + MOVL BP, -4(BX)(R11*1) + ADDQ R11, R14 + ADDQ R11, BX + JMP copy_5_end + +copy_5_move_8through16: + MOVQ (R14), R15 + MOVQ -8(R14)(R11*1), BP + MOVQ R15, (BX) + MOVQ BP, -8(BX)(R11*1) + ADDQ R11, R14 + ADDQ R11, BX + +copy_5_end: + ADDQ R11, DI + SUBQ R11, R13 + + // Copy match from the current buffer +copy_match: + MOVQ BX, R11 + SUBQ R12, R11 + + // ml <= mo + CMPQ R13, R12 + JA copy_overlapping_match + + // Copy non-overlapping match + ADDQ R13, DI + MOVQ R13, R12 + SUBQ $0x10, R12 + JB copy_2_small + +copy_2_loop: + MOVUPS (R11), X0 + MOVUPS X0, (BX) + ADDQ $0x10, R11 + ADDQ $0x10, BX + SUBQ $0x10, R12 + JAE copy_2_loop + LEAQ 16(R11)(R12*1), R11 + LEAQ 16(BX)(R12*1), BX + MOVUPS -16(R11), X0 + MOVUPS X0, -16(BX) + JMP copy_2_end + +copy_2_small: + CMPQ R13, $0x03 + JE copy_2_move_3 + JB copy_2_move_1or2 + CMPQ R13, $0x08 + JB copy_2_move_4through7 + JMP copy_2_move_8through16 + +copy_2_move_1or2: + MOVB (R11), R12 + MOVB -1(R11)(R13*1), R14 + MOVB R12, (BX) + MOVB R14, -1(BX)(R13*1) + ADDQ R13, R11 + ADDQ R13, BX + JMP copy_2_end + +copy_2_move_3: + MOVW (R11), R12 + MOVB 2(R11), R14 + MOVW R12, (BX) + MOVB R14, 2(BX) + ADDQ R13, R11 + ADDQ R13, BX + JMP copy_2_end + +copy_2_move_4through7: + MOVL (R11), R12 + MOVL -4(R11)(R13*1), R14 + MOVL R12, (BX) + MOVL R14, -4(BX)(R13*1) + ADDQ R13, R11 + ADDQ R13, BX + JMP copy_2_end + +copy_2_move_8through16: + MOVQ (R11), R12 + MOVQ -8(R11)(R13*1), R14 + MOVQ R12, (BX) + MOVQ R14, -8(BX)(R13*1) + ADDQ R13, R11 + ADDQ R13, BX + +copy_2_end: + JMP handle_loop + + // Copy overlapping match +copy_overlapping_match: + ADDQ R13, DI + +copy_slow_3: + MOVB (R11), R12 + MOVB R12, (BX) + INCQ R11 + INCQ BX + DECQ R13 + JNZ copy_slow_3 + +handle_loop: + ADDQ $0x18, AX + INCQ DX + CMPQ DX, CX + JB main_loop + +loop_finished: + // Return value + MOVB $0x01, ret+8(FP) + + // Update the context + MOVQ ctx+0(FP), AX + MOVQ DX, 24(AX) + MOVQ DI, 104(AX) + SUBQ 80(AX), SI + MOVQ SI, 112(AX) + RET + +error_match_off_too_big: + // Return value + MOVB $0x00, ret+8(FP) + + // Update the context + MOVQ ctx+0(FP), AX + MOVQ DX, 24(AX) + MOVQ DI, 104(AX) + SUBQ 80(AX), SI + MOVQ SI, 112(AX) + RET + +empty_seqs: + // Return value + MOVB $0x01, ret+8(FP) + RET + +// func sequenceDecs_decodeSync_amd64(s *sequenceDecs, br *bitReader, ctx *decodeSyncAsmContext) int +// Requires: CMOV, SSE +TEXT ·sequenceDecs_decodeSync_amd64(SB), $64-32 + MOVQ br+8(FP), CX + MOVQ 24(CX), DX + MOVBQZX 40(CX), BX + MOVQ (CX), AX + MOVQ 32(CX), SI + ADDQ SI, AX + MOVQ AX, (SP) + MOVQ ctx+16(FP), AX + MOVQ 72(AX), DI + MOVQ 80(AX), R8 + MOVQ 88(AX), R9 + XORQ CX, CX + MOVQ CX, 8(SP) + MOVQ CX, 16(SP) + MOVQ CX, 24(SP) + MOVQ 112(AX), R10 + MOVQ 128(AX), CX + MOVQ CX, 32(SP) + MOVQ 144(AX), R11 + MOVQ 136(AX), R12 + MOVQ 200(AX), CX + MOVQ CX, 56(SP) + MOVQ 176(AX), CX + MOVQ CX, 48(SP) + MOVQ 184(AX), AX + MOVQ AX, 40(SP) + MOVQ 40(SP), AX + ADDQ AX, 48(SP) + + // Calculate pointer to s.out[cap(s.out)] (a past-end pointer) + ADDQ R10, 32(SP) + + // outBase += outPosition + ADDQ R12, R10 + +sequenceDecs_decodeSync_amd64_main_loop: + MOVQ (SP), R13 + + // Fill bitreader to have enough for the offset and match length. + CMPQ SI, $0x08 + JL sequenceDecs_decodeSync_amd64_fill_byte_by_byte + MOVQ BX, AX + SHRQ $0x03, AX + SUBQ AX, R13 + MOVQ (R13), DX + SUBQ AX, SI + ANDQ $0x07, BX + JMP sequenceDecs_decodeSync_amd64_fill_end + +sequenceDecs_decodeSync_amd64_fill_byte_by_byte: + CMPQ SI, $0x00 + JLE sequenceDecs_decodeSync_amd64_fill_check_overread + CMPQ BX, $0x07 + JLE sequenceDecs_decodeSync_amd64_fill_end + SHLQ $0x08, DX + SUBQ $0x01, R13 + SUBQ $0x01, SI + SUBQ $0x08, BX + MOVBQZX (R13), AX + ORQ AX, DX + JMP sequenceDecs_decodeSync_amd64_fill_byte_by_byte + +sequenceDecs_decodeSync_amd64_fill_check_overread: + CMPQ BX, $0x40 + JA error_overread + +sequenceDecs_decodeSync_amd64_fill_end: + // Update offset + MOVQ R9, AX + MOVQ BX, CX + MOVQ DX, R14 + SHLQ CL, R14 + MOVB AH, CL + SHRQ $0x20, AX + TESTQ CX, CX + JZ sequenceDecs_decodeSync_amd64_of_update_zero + ADDQ CX, BX + CMPQ BX, $0x40 + JA sequenceDecs_decodeSync_amd64_of_update_zero + CMPQ CX, $0x40 + JAE sequenceDecs_decodeSync_amd64_of_update_zero + NEGQ CX + SHRQ CL, R14 + ADDQ R14, AX + +sequenceDecs_decodeSync_amd64_of_update_zero: + MOVQ AX, 8(SP) + + // Update match length + MOVQ R8, AX + MOVQ BX, CX + MOVQ DX, R14 + SHLQ CL, R14 + MOVB AH, CL + SHRQ $0x20, AX + TESTQ CX, CX + JZ sequenceDecs_decodeSync_amd64_ml_update_zero + ADDQ CX, BX + CMPQ BX, $0x40 + JA sequenceDecs_decodeSync_amd64_ml_update_zero + CMPQ CX, $0x40 + JAE sequenceDecs_decodeSync_amd64_ml_update_zero + NEGQ CX + SHRQ CL, R14 + ADDQ R14, AX + +sequenceDecs_decodeSync_amd64_ml_update_zero: + MOVQ AX, 16(SP) + + // Fill bitreader to have enough for the remaining + CMPQ SI, $0x08 + JL sequenceDecs_decodeSync_amd64_fill_2_byte_by_byte + MOVQ BX, AX + SHRQ $0x03, AX + SUBQ AX, R13 + MOVQ (R13), DX + SUBQ AX, SI + ANDQ $0x07, BX + JMP sequenceDecs_decodeSync_amd64_fill_2_end + +sequenceDecs_decodeSync_amd64_fill_2_byte_by_byte: + CMPQ SI, $0x00 + JLE sequenceDecs_decodeSync_amd64_fill_2_check_overread + CMPQ BX, $0x07 + JLE sequenceDecs_decodeSync_amd64_fill_2_end + SHLQ $0x08, DX + SUBQ $0x01, R13 + SUBQ $0x01, SI + SUBQ $0x08, BX + MOVBQZX (R13), AX + ORQ AX, DX + JMP sequenceDecs_decodeSync_amd64_fill_2_byte_by_byte + +sequenceDecs_decodeSync_amd64_fill_2_check_overread: + CMPQ BX, $0x40 + JA error_overread + +sequenceDecs_decodeSync_amd64_fill_2_end: + // Update literal length + MOVQ DI, AX + MOVQ BX, CX + MOVQ DX, R14 + SHLQ CL, R14 + MOVB AH, CL + SHRQ $0x20, AX + TESTQ CX, CX + JZ sequenceDecs_decodeSync_amd64_ll_update_zero + ADDQ CX, BX + CMPQ BX, $0x40 + JA sequenceDecs_decodeSync_amd64_ll_update_zero + CMPQ CX, $0x40 + JAE sequenceDecs_decodeSync_amd64_ll_update_zero + NEGQ CX + SHRQ CL, R14 + ADDQ R14, AX + +sequenceDecs_decodeSync_amd64_ll_update_zero: + MOVQ AX, 24(SP) + + // Fill bitreader for state updates + MOVQ R13, (SP) + MOVQ R9, AX + SHRQ $0x08, AX + MOVBQZX AL, AX + MOVQ ctx+16(FP), CX + CMPQ 96(CX), $0x00 + JZ sequenceDecs_decodeSync_amd64_skip_update + + // Update Literal Length State + MOVBQZX DI, R13 + SHRL $0x10, DI + LEAQ (BX)(R13*1), CX + MOVQ DX, R14 + MOVQ CX, BX + ROLQ CL, R14 + MOVL $0x00000001, R15 + MOVB R13, CL + SHLL CL, R15 + DECL R15 + ANDQ R15, R14 + ADDQ R14, DI + + // Load ctx.llTable + MOVQ ctx+16(FP), CX + MOVQ (CX), CX + MOVQ (CX)(DI*8), DI + + // Update Match Length State + MOVBQZX R8, R13 + SHRL $0x10, R8 + LEAQ (BX)(R13*1), CX + MOVQ DX, R14 + MOVQ CX, BX + ROLQ CL, R14 + MOVL $0x00000001, R15 + MOVB R13, CL + SHLL CL, R15 + DECL R15 + ANDQ R15, R14 + ADDQ R14, R8 + + // Load ctx.mlTable + MOVQ ctx+16(FP), CX + MOVQ 24(CX), CX + MOVQ (CX)(R8*8), R8 + + // Update Offset State + MOVBQZX R9, R13 + SHRL $0x10, R9 + LEAQ (BX)(R13*1), CX + MOVQ DX, R14 + MOVQ CX, BX + ROLQ CL, R14 + MOVL $0x00000001, R15 + MOVB R13, CL + SHLL CL, R15 + DECL R15 + ANDQ R15, R14 + ADDQ R14, R9 + + // Load ctx.ofTable + MOVQ ctx+16(FP), CX + MOVQ 48(CX), CX + MOVQ (CX)(R9*8), R9 + +sequenceDecs_decodeSync_amd64_skip_update: + // Adjust offset + MOVQ s+0(FP), CX + MOVQ 8(SP), R13 + CMPQ AX, $0x01 + JBE sequenceDecs_decodeSync_amd64_adjust_offsetB_1_or_0 + MOVUPS 144(CX), X0 + MOVQ R13, 144(CX) + MOVUPS X0, 152(CX) + JMP sequenceDecs_decodeSync_amd64_after_adjust + +sequenceDecs_decodeSync_amd64_adjust_offsetB_1_or_0: + CMPQ 24(SP), $0x00000000 + JNE sequenceDecs_decodeSync_amd64_adjust_offset_maybezero + INCQ R13 + JMP sequenceDecs_decodeSync_amd64_adjust_offset_nonzero + +sequenceDecs_decodeSync_amd64_adjust_offset_maybezero: + TESTQ R13, R13 + JNZ sequenceDecs_decodeSync_amd64_adjust_offset_nonzero + MOVQ 144(CX), R13 + JMP sequenceDecs_decodeSync_amd64_after_adjust + +sequenceDecs_decodeSync_amd64_adjust_offset_nonzero: + MOVQ R13, AX + XORQ R14, R14 + MOVQ $-1, R15 + CMPQ R13, $0x03 + CMOVQEQ R14, AX + CMOVQEQ R15, R14 + ADDQ 144(CX)(AX*8), R14 + JNZ sequenceDecs_decodeSync_amd64_adjust_temp_valid + MOVQ $0x00000001, R14 + +sequenceDecs_decodeSync_amd64_adjust_temp_valid: + CMPQ R13, $0x01 + JZ sequenceDecs_decodeSync_amd64_adjust_skip + MOVQ 152(CX), AX + MOVQ AX, 160(CX) + +sequenceDecs_decodeSync_amd64_adjust_skip: + MOVQ 144(CX), AX + MOVQ AX, 152(CX) + MOVQ R14, 144(CX) + MOVQ R14, R13 + +sequenceDecs_decodeSync_amd64_after_adjust: + MOVQ R13, 8(SP) + + // Check values + MOVQ 16(SP), AX + MOVQ 24(SP), CX + LEAQ (AX)(CX*1), R14 + MOVQ s+0(FP), R15 + ADDQ R14, 256(R15) + MOVQ ctx+16(FP), R14 + SUBQ CX, 104(R14) + JS error_not_enough_literals + CMPQ AX, $0x00020002 + JA sequenceDecs_decodeSync_amd64_error_match_len_too_big + TESTQ R13, R13 + JNZ sequenceDecs_decodeSync_amd64_match_len_ofs_ok + TESTQ AX, AX + JNZ sequenceDecs_decodeSync_amd64_error_match_len_ofs_mismatch + +sequenceDecs_decodeSync_amd64_match_len_ofs_ok: + MOVQ 24(SP), AX + MOVQ 8(SP), CX + MOVQ 16(SP), R13 + + // Check if we have enough space in s.out + LEAQ (AX)(R13*1), R14 + ADDQ R10, R14 + CMPQ R14, 32(SP) + JA error_not_enough_space + + // Copy literals + TESTQ AX, AX + JZ check_offset + XORQ R14, R14 + +copy_1: + MOVUPS (R11)(R14*1), X0 + MOVUPS X0, (R10)(R14*1) + ADDQ $0x10, R14 + CMPQ R14, AX + JB copy_1 + ADDQ AX, R11 + ADDQ AX, R10 + ADDQ AX, R12 + + // Malformed input if seq.mo > t+len(hist) || seq.mo > s.windowSize) +check_offset: + MOVQ R12, AX + ADDQ 40(SP), AX + CMPQ CX, AX + JG error_match_off_too_big + CMPQ CX, 56(SP) + JG error_match_off_too_big + + // Copy match from history + MOVQ CX, AX + SUBQ R12, AX + JLS copy_match + MOVQ 48(SP), R14 + SUBQ AX, R14 + CMPQ R13, AX + JG copy_all_from_history + MOVQ R13, AX + SUBQ $0x10, AX + JB copy_4_small + +copy_4_loop: + MOVUPS (R14), X0 + MOVUPS X0, (R10) + ADDQ $0x10, R14 + ADDQ $0x10, R10 + SUBQ $0x10, AX + JAE copy_4_loop + LEAQ 16(R14)(AX*1), R14 + LEAQ 16(R10)(AX*1), R10 + MOVUPS -16(R14), X0 + MOVUPS X0, -16(R10) + JMP copy_4_end + +copy_4_small: + CMPQ R13, $0x03 + JE copy_4_move_3 + CMPQ R13, $0x08 + JB copy_4_move_4through7 + JMP copy_4_move_8through16 + +copy_4_move_3: + MOVW (R14), AX + MOVB 2(R14), CL + MOVW AX, (R10) + MOVB CL, 2(R10) + ADDQ R13, R14 + ADDQ R13, R10 + JMP copy_4_end + +copy_4_move_4through7: + MOVL (R14), AX + MOVL -4(R14)(R13*1), CX + MOVL AX, (R10) + MOVL CX, -4(R10)(R13*1) + ADDQ R13, R14 + ADDQ R13, R10 + JMP copy_4_end + +copy_4_move_8through16: + MOVQ (R14), AX + MOVQ -8(R14)(R13*1), CX + MOVQ AX, (R10) + MOVQ CX, -8(R10)(R13*1) + ADDQ R13, R14 + ADDQ R13, R10 + +copy_4_end: + ADDQ R13, R12 + JMP handle_loop + JMP loop_finished + +copy_all_from_history: + MOVQ AX, R15 + SUBQ $0x10, R15 + JB copy_5_small + +copy_5_loop: + MOVUPS (R14), X0 + MOVUPS X0, (R10) + ADDQ $0x10, R14 + ADDQ $0x10, R10 + SUBQ $0x10, R15 + JAE copy_5_loop + LEAQ 16(R14)(R15*1), R14 + LEAQ 16(R10)(R15*1), R10 + MOVUPS -16(R14), X0 + MOVUPS X0, -16(R10) + JMP copy_5_end + +copy_5_small: + CMPQ AX, $0x03 + JE copy_5_move_3 + JB copy_5_move_1or2 + CMPQ AX, $0x08 + JB copy_5_move_4through7 + JMP copy_5_move_8through16 + +copy_5_move_1or2: + MOVB (R14), R15 + MOVB -1(R14)(AX*1), BP + MOVB R15, (R10) + MOVB BP, -1(R10)(AX*1) + ADDQ AX, R14 + ADDQ AX, R10 + JMP copy_5_end + +copy_5_move_3: + MOVW (R14), R15 + MOVB 2(R14), BP + MOVW R15, (R10) + MOVB BP, 2(R10) + ADDQ AX, R14 + ADDQ AX, R10 + JMP copy_5_end + +copy_5_move_4through7: + MOVL (R14), R15 + MOVL -4(R14)(AX*1), BP + MOVL R15, (R10) + MOVL BP, -4(R10)(AX*1) + ADDQ AX, R14 + ADDQ AX, R10 + JMP copy_5_end + +copy_5_move_8through16: + MOVQ (R14), R15 + MOVQ -8(R14)(AX*1), BP + MOVQ R15, (R10) + MOVQ BP, -8(R10)(AX*1) + ADDQ AX, R14 + ADDQ AX, R10 + +copy_5_end: + ADDQ AX, R12 + SUBQ AX, R13 + + // Copy match from the current buffer +copy_match: + MOVQ R10, AX + SUBQ CX, AX + + // ml <= mo + CMPQ R13, CX + JA copy_overlapping_match + + // Copy non-overlapping match + ADDQ R13, R12 + MOVQ R10, CX + ADDQ R13, R10 + +copy_2: + MOVUPS (AX), X0 + MOVUPS X0, (CX) + ADDQ $0x10, AX + ADDQ $0x10, CX + SUBQ $0x10, R13 + JHI copy_2 + JMP handle_loop + + // Copy overlapping match +copy_overlapping_match: + ADDQ R13, R12 + +copy_slow_3: + MOVB (AX), CL + MOVB CL, (R10) + INCQ AX + INCQ R10 + DECQ R13 + JNZ copy_slow_3 + +handle_loop: + MOVQ ctx+16(FP), AX + DECQ 96(AX) + JNS sequenceDecs_decodeSync_amd64_main_loop + +loop_finished: + MOVQ br+8(FP), AX + MOVQ DX, 24(AX) + MOVB BL, 40(AX) + MOVQ SI, 32(AX) + + // Update the context + MOVQ ctx+16(FP), AX + MOVQ R12, 136(AX) + MOVQ 144(AX), CX + SUBQ CX, R11 + MOVQ R11, 168(AX) + + // Return success + MOVQ $0x00000000, ret+24(FP) + RET + + // Return with match length error +sequenceDecs_decodeSync_amd64_error_match_len_ofs_mismatch: + MOVQ 16(SP), AX + MOVQ ctx+16(FP), CX + MOVQ AX, 216(CX) + MOVQ $0x00000001, ret+24(FP) + RET + + // Return with match too long error +sequenceDecs_decodeSync_amd64_error_match_len_too_big: + MOVQ ctx+16(FP), AX + MOVQ 16(SP), CX + MOVQ CX, 216(AX) + MOVQ $0x00000002, ret+24(FP) + RET + + // Return with match offset too long error +error_match_off_too_big: + MOVQ ctx+16(FP), AX + MOVQ 8(SP), CX + MOVQ CX, 224(AX) + MOVQ R12, 136(AX) + MOVQ $0x00000003, ret+24(FP) + RET + + // Return with not enough literals error +error_not_enough_literals: + MOVQ ctx+16(FP), AX + MOVQ 24(SP), CX + MOVQ CX, 208(AX) + MOVQ $0x00000004, ret+24(FP) + RET + + // Return with overread error +error_overread: + MOVQ $0x00000006, ret+24(FP) + RET + + // Return with not enough output space error +error_not_enough_space: + MOVQ ctx+16(FP), AX + MOVQ 24(SP), CX + MOVQ CX, 208(AX) + MOVQ 16(SP), CX + MOVQ CX, 216(AX) + MOVQ R12, 136(AX) + MOVQ $0x00000005, ret+24(FP) + RET + +// func sequenceDecs_decodeSync_bmi2(s *sequenceDecs, br *bitReader, ctx *decodeSyncAsmContext) int +// Requires: BMI, BMI2, CMOV, SSE +TEXT ·sequenceDecs_decodeSync_bmi2(SB), $64-32 + MOVQ br+8(FP), BX + MOVQ 24(BX), AX + MOVBQZX 40(BX), DX + MOVQ (BX), CX + MOVQ 32(BX), BX + ADDQ BX, CX + MOVQ CX, (SP) + MOVQ ctx+16(FP), CX + MOVQ 72(CX), SI + MOVQ 80(CX), DI + MOVQ 88(CX), R8 + XORQ R9, R9 + MOVQ R9, 8(SP) + MOVQ R9, 16(SP) + MOVQ R9, 24(SP) + MOVQ 112(CX), R9 + MOVQ 128(CX), R10 + MOVQ R10, 32(SP) + MOVQ 144(CX), R10 + MOVQ 136(CX), R11 + MOVQ 200(CX), R12 + MOVQ R12, 56(SP) + MOVQ 176(CX), R12 + MOVQ R12, 48(SP) + MOVQ 184(CX), CX + MOVQ CX, 40(SP) + MOVQ 40(SP), CX + ADDQ CX, 48(SP) + + // Calculate pointer to s.out[cap(s.out)] (a past-end pointer) + ADDQ R9, 32(SP) + + // outBase += outPosition + ADDQ R11, R9 + +sequenceDecs_decodeSync_bmi2_main_loop: + MOVQ (SP), R12 + + // Fill bitreader to have enough for the offset and match length. + CMPQ BX, $0x08 + JL sequenceDecs_decodeSync_bmi2_fill_byte_by_byte + MOVQ DX, CX + SHRQ $0x03, CX + SUBQ CX, R12 + MOVQ (R12), AX + SUBQ CX, BX + ANDQ $0x07, DX + JMP sequenceDecs_decodeSync_bmi2_fill_end + +sequenceDecs_decodeSync_bmi2_fill_byte_by_byte: + CMPQ BX, $0x00 + JLE sequenceDecs_decodeSync_bmi2_fill_check_overread + CMPQ DX, $0x07 + JLE sequenceDecs_decodeSync_bmi2_fill_end + SHLQ $0x08, AX + SUBQ $0x01, R12 + SUBQ $0x01, BX + SUBQ $0x08, DX + MOVBQZX (R12), CX + ORQ CX, AX + JMP sequenceDecs_decodeSync_bmi2_fill_byte_by_byte + +sequenceDecs_decodeSync_bmi2_fill_check_overread: + CMPQ DX, $0x40 + JA error_overread + +sequenceDecs_decodeSync_bmi2_fill_end: + // Update offset + MOVQ $0x00000808, CX + BEXTRQ CX, R8, R13 + MOVQ AX, R14 + LEAQ (DX)(R13*1), CX + ROLQ CL, R14 + BZHIQ R13, R14, R14 + MOVQ CX, DX + MOVQ R8, CX + SHRQ $0x20, CX + ADDQ R14, CX + MOVQ CX, 8(SP) + + // Update match length + MOVQ $0x00000808, CX + BEXTRQ CX, DI, R13 + MOVQ AX, R14 + LEAQ (DX)(R13*1), CX + ROLQ CL, R14 + BZHIQ R13, R14, R14 + MOVQ CX, DX + MOVQ DI, CX + SHRQ $0x20, CX + ADDQ R14, CX + MOVQ CX, 16(SP) + + // Fill bitreader to have enough for the remaining + CMPQ BX, $0x08 + JL sequenceDecs_decodeSync_bmi2_fill_2_byte_by_byte + MOVQ DX, CX + SHRQ $0x03, CX + SUBQ CX, R12 + MOVQ (R12), AX + SUBQ CX, BX + ANDQ $0x07, DX + JMP sequenceDecs_decodeSync_bmi2_fill_2_end + +sequenceDecs_decodeSync_bmi2_fill_2_byte_by_byte: + CMPQ BX, $0x00 + JLE sequenceDecs_decodeSync_bmi2_fill_2_check_overread + CMPQ DX, $0x07 + JLE sequenceDecs_decodeSync_bmi2_fill_2_end + SHLQ $0x08, AX + SUBQ $0x01, R12 + SUBQ $0x01, BX + SUBQ $0x08, DX + MOVBQZX (R12), CX + ORQ CX, AX + JMP sequenceDecs_decodeSync_bmi2_fill_2_byte_by_byte + +sequenceDecs_decodeSync_bmi2_fill_2_check_overread: + CMPQ DX, $0x40 + JA error_overread + +sequenceDecs_decodeSync_bmi2_fill_2_end: + // Update literal length + MOVQ $0x00000808, CX + BEXTRQ CX, SI, R13 + MOVQ AX, R14 + LEAQ (DX)(R13*1), CX + ROLQ CL, R14 + BZHIQ R13, R14, R14 + MOVQ CX, DX + MOVQ SI, CX + SHRQ $0x20, CX + ADDQ R14, CX + MOVQ CX, 24(SP) + + // Fill bitreader for state updates + MOVQ R12, (SP) + MOVQ $0x00000808, CX + BEXTRQ CX, R8, R12 + MOVQ ctx+16(FP), CX + CMPQ 96(CX), $0x00 + JZ sequenceDecs_decodeSync_bmi2_skip_update + LEAQ (SI)(DI*1), R13 + ADDQ R8, R13 + MOVBQZX R13, R13 + LEAQ (DX)(R13*1), CX + MOVQ AX, R14 + MOVQ CX, DX + ROLQ CL, R14 + BZHIQ R13, R14, R14 + + // Update Offset State + BZHIQ R8, R14, CX + SHRXQ R8, R14, R14 + SHRL $0x10, R8 + ADDQ CX, R8 + + // Load ctx.ofTable + MOVQ ctx+16(FP), CX + MOVQ 48(CX), CX + MOVQ (CX)(R8*8), R8 + + // Update Match Length State + BZHIQ DI, R14, CX + SHRXQ DI, R14, R14 + SHRL $0x10, DI + ADDQ CX, DI + + // Load ctx.mlTable + MOVQ ctx+16(FP), CX + MOVQ 24(CX), CX + MOVQ (CX)(DI*8), DI + + // Update Literal Length State + BZHIQ SI, R14, CX + SHRL $0x10, SI + ADDQ CX, SI + + // Load ctx.llTable + MOVQ ctx+16(FP), CX + MOVQ (CX), CX + MOVQ (CX)(SI*8), SI + +sequenceDecs_decodeSync_bmi2_skip_update: + // Adjust offset + MOVQ s+0(FP), CX + MOVQ 8(SP), R13 + CMPQ R12, $0x01 + JBE sequenceDecs_decodeSync_bmi2_adjust_offsetB_1_or_0 + MOVUPS 144(CX), X0 + MOVQ R13, 144(CX) + MOVUPS X0, 152(CX) + JMP sequenceDecs_decodeSync_bmi2_after_adjust + +sequenceDecs_decodeSync_bmi2_adjust_offsetB_1_or_0: + CMPQ 24(SP), $0x00000000 + JNE sequenceDecs_decodeSync_bmi2_adjust_offset_maybezero + INCQ R13 + JMP sequenceDecs_decodeSync_bmi2_adjust_offset_nonzero + +sequenceDecs_decodeSync_bmi2_adjust_offset_maybezero: + TESTQ R13, R13 + JNZ sequenceDecs_decodeSync_bmi2_adjust_offset_nonzero + MOVQ 144(CX), R13 + JMP sequenceDecs_decodeSync_bmi2_after_adjust + +sequenceDecs_decodeSync_bmi2_adjust_offset_nonzero: + MOVQ R13, R12 + XORQ R14, R14 + MOVQ $-1, R15 + CMPQ R13, $0x03 + CMOVQEQ R14, R12 + CMOVQEQ R15, R14 + ADDQ 144(CX)(R12*8), R14 + JNZ sequenceDecs_decodeSync_bmi2_adjust_temp_valid + MOVQ $0x00000001, R14 + +sequenceDecs_decodeSync_bmi2_adjust_temp_valid: + CMPQ R13, $0x01 + JZ sequenceDecs_decodeSync_bmi2_adjust_skip + MOVQ 152(CX), R12 + MOVQ R12, 160(CX) + +sequenceDecs_decodeSync_bmi2_adjust_skip: + MOVQ 144(CX), R12 + MOVQ R12, 152(CX) + MOVQ R14, 144(CX) + MOVQ R14, R13 + +sequenceDecs_decodeSync_bmi2_after_adjust: + MOVQ R13, 8(SP) + + // Check values + MOVQ 16(SP), CX + MOVQ 24(SP), R12 + LEAQ (CX)(R12*1), R14 + MOVQ s+0(FP), R15 + ADDQ R14, 256(R15) + MOVQ ctx+16(FP), R14 + SUBQ R12, 104(R14) + JS error_not_enough_literals + CMPQ CX, $0x00020002 + JA sequenceDecs_decodeSync_bmi2_error_match_len_too_big + TESTQ R13, R13 + JNZ sequenceDecs_decodeSync_bmi2_match_len_ofs_ok + TESTQ CX, CX + JNZ sequenceDecs_decodeSync_bmi2_error_match_len_ofs_mismatch + +sequenceDecs_decodeSync_bmi2_match_len_ofs_ok: + MOVQ 24(SP), CX + MOVQ 8(SP), R12 + MOVQ 16(SP), R13 + + // Check if we have enough space in s.out + LEAQ (CX)(R13*1), R14 + ADDQ R9, R14 + CMPQ R14, 32(SP) + JA error_not_enough_space + + // Copy literals + TESTQ CX, CX + JZ check_offset + XORQ R14, R14 + +copy_1: + MOVUPS (R10)(R14*1), X0 + MOVUPS X0, (R9)(R14*1) + ADDQ $0x10, R14 + CMPQ R14, CX + JB copy_1 + ADDQ CX, R10 + ADDQ CX, R9 + ADDQ CX, R11 + + // Malformed input if seq.mo > t+len(hist) || seq.mo > s.windowSize) +check_offset: + MOVQ R11, CX + ADDQ 40(SP), CX + CMPQ R12, CX + JG error_match_off_too_big + CMPQ R12, 56(SP) + JG error_match_off_too_big + + // Copy match from history + MOVQ R12, CX + SUBQ R11, CX + JLS copy_match + MOVQ 48(SP), R14 + SUBQ CX, R14 + CMPQ R13, CX + JG copy_all_from_history + MOVQ R13, CX + SUBQ $0x10, CX + JB copy_4_small + +copy_4_loop: + MOVUPS (R14), X0 + MOVUPS X0, (R9) + ADDQ $0x10, R14 + ADDQ $0x10, R9 + SUBQ $0x10, CX + JAE copy_4_loop + LEAQ 16(R14)(CX*1), R14 + LEAQ 16(R9)(CX*1), R9 + MOVUPS -16(R14), X0 + MOVUPS X0, -16(R9) + JMP copy_4_end + +copy_4_small: + CMPQ R13, $0x03 + JE copy_4_move_3 + CMPQ R13, $0x08 + JB copy_4_move_4through7 + JMP copy_4_move_8through16 + +copy_4_move_3: + MOVW (R14), CX + MOVB 2(R14), R12 + MOVW CX, (R9) + MOVB R12, 2(R9) + ADDQ R13, R14 + ADDQ R13, R9 + JMP copy_4_end + +copy_4_move_4through7: + MOVL (R14), CX + MOVL -4(R14)(R13*1), R12 + MOVL CX, (R9) + MOVL R12, -4(R9)(R13*1) + ADDQ R13, R14 + ADDQ R13, R9 + JMP copy_4_end + +copy_4_move_8through16: + MOVQ (R14), CX + MOVQ -8(R14)(R13*1), R12 + MOVQ CX, (R9) + MOVQ R12, -8(R9)(R13*1) + ADDQ R13, R14 + ADDQ R13, R9 + +copy_4_end: + ADDQ R13, R11 + JMP handle_loop + JMP loop_finished + +copy_all_from_history: + MOVQ CX, R15 + SUBQ $0x10, R15 + JB copy_5_small + +copy_5_loop: + MOVUPS (R14), X0 + MOVUPS X0, (R9) + ADDQ $0x10, R14 + ADDQ $0x10, R9 + SUBQ $0x10, R15 + JAE copy_5_loop + LEAQ 16(R14)(R15*1), R14 + LEAQ 16(R9)(R15*1), R9 + MOVUPS -16(R14), X0 + MOVUPS X0, -16(R9) + JMP copy_5_end + +copy_5_small: + CMPQ CX, $0x03 + JE copy_5_move_3 + JB copy_5_move_1or2 + CMPQ CX, $0x08 + JB copy_5_move_4through7 + JMP copy_5_move_8through16 + +copy_5_move_1or2: + MOVB (R14), R15 + MOVB -1(R14)(CX*1), BP + MOVB R15, (R9) + MOVB BP, -1(R9)(CX*1) + ADDQ CX, R14 + ADDQ CX, R9 + JMP copy_5_end + +copy_5_move_3: + MOVW (R14), R15 + MOVB 2(R14), BP + MOVW R15, (R9) + MOVB BP, 2(R9) + ADDQ CX, R14 + ADDQ CX, R9 + JMP copy_5_end + +copy_5_move_4through7: + MOVL (R14), R15 + MOVL -4(R14)(CX*1), BP + MOVL R15, (R9) + MOVL BP, -4(R9)(CX*1) + ADDQ CX, R14 + ADDQ CX, R9 + JMP copy_5_end + +copy_5_move_8through16: + MOVQ (R14), R15 + MOVQ -8(R14)(CX*1), BP + MOVQ R15, (R9) + MOVQ BP, -8(R9)(CX*1) + ADDQ CX, R14 + ADDQ CX, R9 + +copy_5_end: + ADDQ CX, R11 + SUBQ CX, R13 + + // Copy match from the current buffer +copy_match: + MOVQ R9, CX + SUBQ R12, CX + + // ml <= mo + CMPQ R13, R12 + JA copy_overlapping_match + + // Copy non-overlapping match + ADDQ R13, R11 + MOVQ R9, R12 + ADDQ R13, R9 + +copy_2: + MOVUPS (CX), X0 + MOVUPS X0, (R12) + ADDQ $0x10, CX + ADDQ $0x10, R12 + SUBQ $0x10, R13 + JHI copy_2 + JMP handle_loop + + // Copy overlapping match +copy_overlapping_match: + ADDQ R13, R11 + +copy_slow_3: + MOVB (CX), R12 + MOVB R12, (R9) + INCQ CX + INCQ R9 + DECQ R13 + JNZ copy_slow_3 + +handle_loop: + MOVQ ctx+16(FP), CX + DECQ 96(CX) + JNS sequenceDecs_decodeSync_bmi2_main_loop + +loop_finished: + MOVQ br+8(FP), CX + MOVQ AX, 24(CX) + MOVB DL, 40(CX) + MOVQ BX, 32(CX) + + // Update the context + MOVQ ctx+16(FP), AX + MOVQ R11, 136(AX) + MOVQ 144(AX), CX + SUBQ CX, R10 + MOVQ R10, 168(AX) + + // Return success + MOVQ $0x00000000, ret+24(FP) + RET + + // Return with match length error +sequenceDecs_decodeSync_bmi2_error_match_len_ofs_mismatch: + MOVQ 16(SP), AX + MOVQ ctx+16(FP), CX + MOVQ AX, 216(CX) + MOVQ $0x00000001, ret+24(FP) + RET + + // Return with match too long error +sequenceDecs_decodeSync_bmi2_error_match_len_too_big: + MOVQ ctx+16(FP), AX + MOVQ 16(SP), CX + MOVQ CX, 216(AX) + MOVQ $0x00000002, ret+24(FP) + RET + + // Return with match offset too long error +error_match_off_too_big: + MOVQ ctx+16(FP), AX + MOVQ 8(SP), CX + MOVQ CX, 224(AX) + MOVQ R11, 136(AX) + MOVQ $0x00000003, ret+24(FP) + RET + + // Return with not enough literals error +error_not_enough_literals: + MOVQ ctx+16(FP), AX + MOVQ 24(SP), CX + MOVQ CX, 208(AX) + MOVQ $0x00000004, ret+24(FP) + RET + + // Return with overread error +error_overread: + MOVQ $0x00000006, ret+24(FP) + RET + + // Return with not enough output space error +error_not_enough_space: + MOVQ ctx+16(FP), AX + MOVQ 24(SP), CX + MOVQ CX, 208(AX) + MOVQ 16(SP), CX + MOVQ CX, 216(AX) + MOVQ R11, 136(AX) + MOVQ $0x00000005, ret+24(FP) + RET + +// func sequenceDecs_decodeSync_safe_amd64(s *sequenceDecs, br *bitReader, ctx *decodeSyncAsmContext) int +// Requires: CMOV, SSE +TEXT ·sequenceDecs_decodeSync_safe_amd64(SB), $64-32 + MOVQ br+8(FP), CX + MOVQ 24(CX), DX + MOVBQZX 40(CX), BX + MOVQ (CX), AX + MOVQ 32(CX), SI + ADDQ SI, AX + MOVQ AX, (SP) + MOVQ ctx+16(FP), AX + MOVQ 72(AX), DI + MOVQ 80(AX), R8 + MOVQ 88(AX), R9 + XORQ CX, CX + MOVQ CX, 8(SP) + MOVQ CX, 16(SP) + MOVQ CX, 24(SP) + MOVQ 112(AX), R10 + MOVQ 128(AX), CX + MOVQ CX, 32(SP) + MOVQ 144(AX), R11 + MOVQ 136(AX), R12 + MOVQ 200(AX), CX + MOVQ CX, 56(SP) + MOVQ 176(AX), CX + MOVQ CX, 48(SP) + MOVQ 184(AX), AX + MOVQ AX, 40(SP) + MOVQ 40(SP), AX + ADDQ AX, 48(SP) + + // Calculate pointer to s.out[cap(s.out)] (a past-end pointer) + ADDQ R10, 32(SP) + + // outBase += outPosition + ADDQ R12, R10 + +sequenceDecs_decodeSync_safe_amd64_main_loop: + MOVQ (SP), R13 + + // Fill bitreader to have enough for the offset and match length. + CMPQ SI, $0x08 + JL sequenceDecs_decodeSync_safe_amd64_fill_byte_by_byte + MOVQ BX, AX + SHRQ $0x03, AX + SUBQ AX, R13 + MOVQ (R13), DX + SUBQ AX, SI + ANDQ $0x07, BX + JMP sequenceDecs_decodeSync_safe_amd64_fill_end + +sequenceDecs_decodeSync_safe_amd64_fill_byte_by_byte: + CMPQ SI, $0x00 + JLE sequenceDecs_decodeSync_safe_amd64_fill_check_overread + CMPQ BX, $0x07 + JLE sequenceDecs_decodeSync_safe_amd64_fill_end + SHLQ $0x08, DX + SUBQ $0x01, R13 + SUBQ $0x01, SI + SUBQ $0x08, BX + MOVBQZX (R13), AX + ORQ AX, DX + JMP sequenceDecs_decodeSync_safe_amd64_fill_byte_by_byte + +sequenceDecs_decodeSync_safe_amd64_fill_check_overread: + CMPQ BX, $0x40 + JA error_overread + +sequenceDecs_decodeSync_safe_amd64_fill_end: + // Update offset + MOVQ R9, AX + MOVQ BX, CX + MOVQ DX, R14 + SHLQ CL, R14 + MOVB AH, CL + SHRQ $0x20, AX + TESTQ CX, CX + JZ sequenceDecs_decodeSync_safe_amd64_of_update_zero + ADDQ CX, BX + CMPQ BX, $0x40 + JA sequenceDecs_decodeSync_safe_amd64_of_update_zero + CMPQ CX, $0x40 + JAE sequenceDecs_decodeSync_safe_amd64_of_update_zero + NEGQ CX + SHRQ CL, R14 + ADDQ R14, AX + +sequenceDecs_decodeSync_safe_amd64_of_update_zero: + MOVQ AX, 8(SP) + + // Update match length + MOVQ R8, AX + MOVQ BX, CX + MOVQ DX, R14 + SHLQ CL, R14 + MOVB AH, CL + SHRQ $0x20, AX + TESTQ CX, CX + JZ sequenceDecs_decodeSync_safe_amd64_ml_update_zero + ADDQ CX, BX + CMPQ BX, $0x40 + JA sequenceDecs_decodeSync_safe_amd64_ml_update_zero + CMPQ CX, $0x40 + JAE sequenceDecs_decodeSync_safe_amd64_ml_update_zero + NEGQ CX + SHRQ CL, R14 + ADDQ R14, AX + +sequenceDecs_decodeSync_safe_amd64_ml_update_zero: + MOVQ AX, 16(SP) + + // Fill bitreader to have enough for the remaining + CMPQ SI, $0x08 + JL sequenceDecs_decodeSync_safe_amd64_fill_2_byte_by_byte + MOVQ BX, AX + SHRQ $0x03, AX + SUBQ AX, R13 + MOVQ (R13), DX + SUBQ AX, SI + ANDQ $0x07, BX + JMP sequenceDecs_decodeSync_safe_amd64_fill_2_end + +sequenceDecs_decodeSync_safe_amd64_fill_2_byte_by_byte: + CMPQ SI, $0x00 + JLE sequenceDecs_decodeSync_safe_amd64_fill_2_check_overread + CMPQ BX, $0x07 + JLE sequenceDecs_decodeSync_safe_amd64_fill_2_end + SHLQ $0x08, DX + SUBQ $0x01, R13 + SUBQ $0x01, SI + SUBQ $0x08, BX + MOVBQZX (R13), AX + ORQ AX, DX + JMP sequenceDecs_decodeSync_safe_amd64_fill_2_byte_by_byte + +sequenceDecs_decodeSync_safe_amd64_fill_2_check_overread: + CMPQ BX, $0x40 + JA error_overread + +sequenceDecs_decodeSync_safe_amd64_fill_2_end: + // Update literal length + MOVQ DI, AX + MOVQ BX, CX + MOVQ DX, R14 + SHLQ CL, R14 + MOVB AH, CL + SHRQ $0x20, AX + TESTQ CX, CX + JZ sequenceDecs_decodeSync_safe_amd64_ll_update_zero + ADDQ CX, BX + CMPQ BX, $0x40 + JA sequenceDecs_decodeSync_safe_amd64_ll_update_zero + CMPQ CX, $0x40 + JAE sequenceDecs_decodeSync_safe_amd64_ll_update_zero + NEGQ CX + SHRQ CL, R14 + ADDQ R14, AX + +sequenceDecs_decodeSync_safe_amd64_ll_update_zero: + MOVQ AX, 24(SP) + + // Fill bitreader for state updates + MOVQ R13, (SP) + MOVQ R9, AX + SHRQ $0x08, AX + MOVBQZX AL, AX + MOVQ ctx+16(FP), CX + CMPQ 96(CX), $0x00 + JZ sequenceDecs_decodeSync_safe_amd64_skip_update + + // Update Literal Length State + MOVBQZX DI, R13 + SHRL $0x10, DI + LEAQ (BX)(R13*1), CX + MOVQ DX, R14 + MOVQ CX, BX + ROLQ CL, R14 + MOVL $0x00000001, R15 + MOVB R13, CL + SHLL CL, R15 + DECL R15 + ANDQ R15, R14 + ADDQ R14, DI + + // Load ctx.llTable + MOVQ ctx+16(FP), CX + MOVQ (CX), CX + MOVQ (CX)(DI*8), DI + + // Update Match Length State + MOVBQZX R8, R13 + SHRL $0x10, R8 + LEAQ (BX)(R13*1), CX + MOVQ DX, R14 + MOVQ CX, BX + ROLQ CL, R14 + MOVL $0x00000001, R15 + MOVB R13, CL + SHLL CL, R15 + DECL R15 + ANDQ R15, R14 + ADDQ R14, R8 + + // Load ctx.mlTable + MOVQ ctx+16(FP), CX + MOVQ 24(CX), CX + MOVQ (CX)(R8*8), R8 + + // Update Offset State + MOVBQZX R9, R13 + SHRL $0x10, R9 + LEAQ (BX)(R13*1), CX + MOVQ DX, R14 + MOVQ CX, BX + ROLQ CL, R14 + MOVL $0x00000001, R15 + MOVB R13, CL + SHLL CL, R15 + DECL R15 + ANDQ R15, R14 + ADDQ R14, R9 + + // Load ctx.ofTable + MOVQ ctx+16(FP), CX + MOVQ 48(CX), CX + MOVQ (CX)(R9*8), R9 + +sequenceDecs_decodeSync_safe_amd64_skip_update: + // Adjust offset + MOVQ s+0(FP), CX + MOVQ 8(SP), R13 + CMPQ AX, $0x01 + JBE sequenceDecs_decodeSync_safe_amd64_adjust_offsetB_1_or_0 + MOVUPS 144(CX), X0 + MOVQ R13, 144(CX) + MOVUPS X0, 152(CX) + JMP sequenceDecs_decodeSync_safe_amd64_after_adjust + +sequenceDecs_decodeSync_safe_amd64_adjust_offsetB_1_or_0: + CMPQ 24(SP), $0x00000000 + JNE sequenceDecs_decodeSync_safe_amd64_adjust_offset_maybezero + INCQ R13 + JMP sequenceDecs_decodeSync_safe_amd64_adjust_offset_nonzero + +sequenceDecs_decodeSync_safe_amd64_adjust_offset_maybezero: + TESTQ R13, R13 + JNZ sequenceDecs_decodeSync_safe_amd64_adjust_offset_nonzero + MOVQ 144(CX), R13 + JMP sequenceDecs_decodeSync_safe_amd64_after_adjust + +sequenceDecs_decodeSync_safe_amd64_adjust_offset_nonzero: + MOVQ R13, AX + XORQ R14, R14 + MOVQ $-1, R15 + CMPQ R13, $0x03 + CMOVQEQ R14, AX + CMOVQEQ R15, R14 + ADDQ 144(CX)(AX*8), R14 + JNZ sequenceDecs_decodeSync_safe_amd64_adjust_temp_valid + MOVQ $0x00000001, R14 + +sequenceDecs_decodeSync_safe_amd64_adjust_temp_valid: + CMPQ R13, $0x01 + JZ sequenceDecs_decodeSync_safe_amd64_adjust_skip + MOVQ 152(CX), AX + MOVQ AX, 160(CX) + +sequenceDecs_decodeSync_safe_amd64_adjust_skip: + MOVQ 144(CX), AX + MOVQ AX, 152(CX) + MOVQ R14, 144(CX) + MOVQ R14, R13 + +sequenceDecs_decodeSync_safe_amd64_after_adjust: + MOVQ R13, 8(SP) + + // Check values + MOVQ 16(SP), AX + MOVQ 24(SP), CX + LEAQ (AX)(CX*1), R14 + MOVQ s+0(FP), R15 + ADDQ R14, 256(R15) + MOVQ ctx+16(FP), R14 + SUBQ CX, 104(R14) + JS error_not_enough_literals + CMPQ AX, $0x00020002 + JA sequenceDecs_decodeSync_safe_amd64_error_match_len_too_big + TESTQ R13, R13 + JNZ sequenceDecs_decodeSync_safe_amd64_match_len_ofs_ok + TESTQ AX, AX + JNZ sequenceDecs_decodeSync_safe_amd64_error_match_len_ofs_mismatch + +sequenceDecs_decodeSync_safe_amd64_match_len_ofs_ok: + MOVQ 24(SP), AX + MOVQ 8(SP), CX + MOVQ 16(SP), R13 + + // Check if we have enough space in s.out + LEAQ (AX)(R13*1), R14 + ADDQ R10, R14 + CMPQ R14, 32(SP) + JA error_not_enough_space + + // Copy literals + TESTQ AX, AX + JZ check_offset + MOVQ AX, R14 + SUBQ $0x10, R14 + JB copy_1_small + +copy_1_loop: + MOVUPS (R11), X0 + MOVUPS X0, (R10) + ADDQ $0x10, R11 + ADDQ $0x10, R10 + SUBQ $0x10, R14 + JAE copy_1_loop + LEAQ 16(R11)(R14*1), R11 + LEAQ 16(R10)(R14*1), R10 + MOVUPS -16(R11), X0 + MOVUPS X0, -16(R10) + JMP copy_1_end + +copy_1_small: + CMPQ AX, $0x03 + JE copy_1_move_3 + JB copy_1_move_1or2 + CMPQ AX, $0x08 + JB copy_1_move_4through7 + JMP copy_1_move_8through16 + +copy_1_move_1or2: + MOVB (R11), R14 + MOVB -1(R11)(AX*1), R15 + MOVB R14, (R10) + MOVB R15, -1(R10)(AX*1) + ADDQ AX, R11 + ADDQ AX, R10 + JMP copy_1_end + +copy_1_move_3: + MOVW (R11), R14 + MOVB 2(R11), R15 + MOVW R14, (R10) + MOVB R15, 2(R10) + ADDQ AX, R11 + ADDQ AX, R10 + JMP copy_1_end + +copy_1_move_4through7: + MOVL (R11), R14 + MOVL -4(R11)(AX*1), R15 + MOVL R14, (R10) + MOVL R15, -4(R10)(AX*1) + ADDQ AX, R11 + ADDQ AX, R10 + JMP copy_1_end + +copy_1_move_8through16: + MOVQ (R11), R14 + MOVQ -8(R11)(AX*1), R15 + MOVQ R14, (R10) + MOVQ R15, -8(R10)(AX*1) + ADDQ AX, R11 + ADDQ AX, R10 + +copy_1_end: + ADDQ AX, R12 + + // Malformed input if seq.mo > t+len(hist) || seq.mo > s.windowSize) +check_offset: + MOVQ R12, AX + ADDQ 40(SP), AX + CMPQ CX, AX + JG error_match_off_too_big + CMPQ CX, 56(SP) + JG error_match_off_too_big + + // Copy match from history + MOVQ CX, AX + SUBQ R12, AX + JLS copy_match + MOVQ 48(SP), R14 + SUBQ AX, R14 + CMPQ R13, AX + JG copy_all_from_history + MOVQ R13, AX + SUBQ $0x10, AX + JB copy_4_small + +copy_4_loop: + MOVUPS (R14), X0 + MOVUPS X0, (R10) + ADDQ $0x10, R14 + ADDQ $0x10, R10 + SUBQ $0x10, AX + JAE copy_4_loop + LEAQ 16(R14)(AX*1), R14 + LEAQ 16(R10)(AX*1), R10 + MOVUPS -16(R14), X0 + MOVUPS X0, -16(R10) + JMP copy_4_end + +copy_4_small: + CMPQ R13, $0x03 + JE copy_4_move_3 + CMPQ R13, $0x08 + JB copy_4_move_4through7 + JMP copy_4_move_8through16 + +copy_4_move_3: + MOVW (R14), AX + MOVB 2(R14), CL + MOVW AX, (R10) + MOVB CL, 2(R10) + ADDQ R13, R14 + ADDQ R13, R10 + JMP copy_4_end + +copy_4_move_4through7: + MOVL (R14), AX + MOVL -4(R14)(R13*1), CX + MOVL AX, (R10) + MOVL CX, -4(R10)(R13*1) + ADDQ R13, R14 + ADDQ R13, R10 + JMP copy_4_end + +copy_4_move_8through16: + MOVQ (R14), AX + MOVQ -8(R14)(R13*1), CX + MOVQ AX, (R10) + MOVQ CX, -8(R10)(R13*1) + ADDQ R13, R14 + ADDQ R13, R10 + +copy_4_end: + ADDQ R13, R12 + JMP handle_loop + JMP loop_finished + +copy_all_from_history: + MOVQ AX, R15 + SUBQ $0x10, R15 + JB copy_5_small + +copy_5_loop: + MOVUPS (R14), X0 + MOVUPS X0, (R10) + ADDQ $0x10, R14 + ADDQ $0x10, R10 + SUBQ $0x10, R15 + JAE copy_5_loop + LEAQ 16(R14)(R15*1), R14 + LEAQ 16(R10)(R15*1), R10 + MOVUPS -16(R14), X0 + MOVUPS X0, -16(R10) + JMP copy_5_end + +copy_5_small: + CMPQ AX, $0x03 + JE copy_5_move_3 + JB copy_5_move_1or2 + CMPQ AX, $0x08 + JB copy_5_move_4through7 + JMP copy_5_move_8through16 + +copy_5_move_1or2: + MOVB (R14), R15 + MOVB -1(R14)(AX*1), BP + MOVB R15, (R10) + MOVB BP, -1(R10)(AX*1) + ADDQ AX, R14 + ADDQ AX, R10 + JMP copy_5_end + +copy_5_move_3: + MOVW (R14), R15 + MOVB 2(R14), BP + MOVW R15, (R10) + MOVB BP, 2(R10) + ADDQ AX, R14 + ADDQ AX, R10 + JMP copy_5_end + +copy_5_move_4through7: + MOVL (R14), R15 + MOVL -4(R14)(AX*1), BP + MOVL R15, (R10) + MOVL BP, -4(R10)(AX*1) + ADDQ AX, R14 + ADDQ AX, R10 + JMP copy_5_end + +copy_5_move_8through16: + MOVQ (R14), R15 + MOVQ -8(R14)(AX*1), BP + MOVQ R15, (R10) + MOVQ BP, -8(R10)(AX*1) + ADDQ AX, R14 + ADDQ AX, R10 + +copy_5_end: + ADDQ AX, R12 + SUBQ AX, R13 + + // Copy match from the current buffer +copy_match: + MOVQ R10, AX + SUBQ CX, AX + + // ml <= mo + CMPQ R13, CX + JA copy_overlapping_match + + // Copy non-overlapping match + ADDQ R13, R12 + MOVQ R13, CX + SUBQ $0x10, CX + JB copy_2_small + +copy_2_loop: + MOVUPS (AX), X0 + MOVUPS X0, (R10) + ADDQ $0x10, AX + ADDQ $0x10, R10 + SUBQ $0x10, CX + JAE copy_2_loop + LEAQ 16(AX)(CX*1), AX + LEAQ 16(R10)(CX*1), R10 + MOVUPS -16(AX), X0 + MOVUPS X0, -16(R10) + JMP copy_2_end + +copy_2_small: + CMPQ R13, $0x03 + JE copy_2_move_3 + JB copy_2_move_1or2 + CMPQ R13, $0x08 + JB copy_2_move_4through7 + JMP copy_2_move_8through16 + +copy_2_move_1or2: + MOVB (AX), CL + MOVB -1(AX)(R13*1), R14 + MOVB CL, (R10) + MOVB R14, -1(R10)(R13*1) + ADDQ R13, AX + ADDQ R13, R10 + JMP copy_2_end + +copy_2_move_3: + MOVW (AX), CX + MOVB 2(AX), R14 + MOVW CX, (R10) + MOVB R14, 2(R10) + ADDQ R13, AX + ADDQ R13, R10 + JMP copy_2_end + +copy_2_move_4through7: + MOVL (AX), CX + MOVL -4(AX)(R13*1), R14 + MOVL CX, (R10) + MOVL R14, -4(R10)(R13*1) + ADDQ R13, AX + ADDQ R13, R10 + JMP copy_2_end + +copy_2_move_8through16: + MOVQ (AX), CX + MOVQ -8(AX)(R13*1), R14 + MOVQ CX, (R10) + MOVQ R14, -8(R10)(R13*1) + ADDQ R13, AX + ADDQ R13, R10 + +copy_2_end: + JMP handle_loop + + // Copy overlapping match +copy_overlapping_match: + ADDQ R13, R12 + +copy_slow_3: + MOVB (AX), CL + MOVB CL, (R10) + INCQ AX + INCQ R10 + DECQ R13 + JNZ copy_slow_3 + +handle_loop: + MOVQ ctx+16(FP), AX + DECQ 96(AX) + JNS sequenceDecs_decodeSync_safe_amd64_main_loop + +loop_finished: + MOVQ br+8(FP), AX + MOVQ DX, 24(AX) + MOVB BL, 40(AX) + MOVQ SI, 32(AX) + + // Update the context + MOVQ ctx+16(FP), AX + MOVQ R12, 136(AX) + MOVQ 144(AX), CX + SUBQ CX, R11 + MOVQ R11, 168(AX) + + // Return success + MOVQ $0x00000000, ret+24(FP) + RET + + // Return with match length error +sequenceDecs_decodeSync_safe_amd64_error_match_len_ofs_mismatch: + MOVQ 16(SP), AX + MOVQ ctx+16(FP), CX + MOVQ AX, 216(CX) + MOVQ $0x00000001, ret+24(FP) + RET + + // Return with match too long error +sequenceDecs_decodeSync_safe_amd64_error_match_len_too_big: + MOVQ ctx+16(FP), AX + MOVQ 16(SP), CX + MOVQ CX, 216(AX) + MOVQ $0x00000002, ret+24(FP) + RET + + // Return with match offset too long error +error_match_off_too_big: + MOVQ ctx+16(FP), AX + MOVQ 8(SP), CX + MOVQ CX, 224(AX) + MOVQ R12, 136(AX) + MOVQ $0x00000003, ret+24(FP) + RET + + // Return with not enough literals error +error_not_enough_literals: + MOVQ ctx+16(FP), AX + MOVQ 24(SP), CX + MOVQ CX, 208(AX) + MOVQ $0x00000004, ret+24(FP) + RET + + // Return with overread error +error_overread: + MOVQ $0x00000006, ret+24(FP) + RET + + // Return with not enough output space error +error_not_enough_space: + MOVQ ctx+16(FP), AX + MOVQ 24(SP), CX + MOVQ CX, 208(AX) + MOVQ 16(SP), CX + MOVQ CX, 216(AX) + MOVQ R12, 136(AX) + MOVQ $0x00000005, ret+24(FP) + RET + +// func sequenceDecs_decodeSync_safe_bmi2(s *sequenceDecs, br *bitReader, ctx *decodeSyncAsmContext) int +// Requires: BMI, BMI2, CMOV, SSE +TEXT ·sequenceDecs_decodeSync_safe_bmi2(SB), $64-32 + MOVQ br+8(FP), BX + MOVQ 24(BX), AX + MOVBQZX 40(BX), DX + MOVQ (BX), CX + MOVQ 32(BX), BX + ADDQ BX, CX + MOVQ CX, (SP) + MOVQ ctx+16(FP), CX + MOVQ 72(CX), SI + MOVQ 80(CX), DI + MOVQ 88(CX), R8 + XORQ R9, R9 + MOVQ R9, 8(SP) + MOVQ R9, 16(SP) + MOVQ R9, 24(SP) + MOVQ 112(CX), R9 + MOVQ 128(CX), R10 + MOVQ R10, 32(SP) + MOVQ 144(CX), R10 + MOVQ 136(CX), R11 + MOVQ 200(CX), R12 + MOVQ R12, 56(SP) + MOVQ 176(CX), R12 + MOVQ R12, 48(SP) + MOVQ 184(CX), CX + MOVQ CX, 40(SP) + MOVQ 40(SP), CX + ADDQ CX, 48(SP) + + // Calculate pointer to s.out[cap(s.out)] (a past-end pointer) + ADDQ R9, 32(SP) + + // outBase += outPosition + ADDQ R11, R9 + +sequenceDecs_decodeSync_safe_bmi2_main_loop: + MOVQ (SP), R12 + + // Fill bitreader to have enough for the offset and match length. + CMPQ BX, $0x08 + JL sequenceDecs_decodeSync_safe_bmi2_fill_byte_by_byte + MOVQ DX, CX + SHRQ $0x03, CX + SUBQ CX, R12 + MOVQ (R12), AX + SUBQ CX, BX + ANDQ $0x07, DX + JMP sequenceDecs_decodeSync_safe_bmi2_fill_end + +sequenceDecs_decodeSync_safe_bmi2_fill_byte_by_byte: + CMPQ BX, $0x00 + JLE sequenceDecs_decodeSync_safe_bmi2_fill_check_overread + CMPQ DX, $0x07 + JLE sequenceDecs_decodeSync_safe_bmi2_fill_end + SHLQ $0x08, AX + SUBQ $0x01, R12 + SUBQ $0x01, BX + SUBQ $0x08, DX + MOVBQZX (R12), CX + ORQ CX, AX + JMP sequenceDecs_decodeSync_safe_bmi2_fill_byte_by_byte + +sequenceDecs_decodeSync_safe_bmi2_fill_check_overread: + CMPQ DX, $0x40 + JA error_overread + +sequenceDecs_decodeSync_safe_bmi2_fill_end: + // Update offset + MOVQ $0x00000808, CX + BEXTRQ CX, R8, R13 + MOVQ AX, R14 + LEAQ (DX)(R13*1), CX + ROLQ CL, R14 + BZHIQ R13, R14, R14 + MOVQ CX, DX + MOVQ R8, CX + SHRQ $0x20, CX + ADDQ R14, CX + MOVQ CX, 8(SP) + + // Update match length + MOVQ $0x00000808, CX + BEXTRQ CX, DI, R13 + MOVQ AX, R14 + LEAQ (DX)(R13*1), CX + ROLQ CL, R14 + BZHIQ R13, R14, R14 + MOVQ CX, DX + MOVQ DI, CX + SHRQ $0x20, CX + ADDQ R14, CX + MOVQ CX, 16(SP) + + // Fill bitreader to have enough for the remaining + CMPQ BX, $0x08 + JL sequenceDecs_decodeSync_safe_bmi2_fill_2_byte_by_byte + MOVQ DX, CX + SHRQ $0x03, CX + SUBQ CX, R12 + MOVQ (R12), AX + SUBQ CX, BX + ANDQ $0x07, DX + JMP sequenceDecs_decodeSync_safe_bmi2_fill_2_end + +sequenceDecs_decodeSync_safe_bmi2_fill_2_byte_by_byte: + CMPQ BX, $0x00 + JLE sequenceDecs_decodeSync_safe_bmi2_fill_2_check_overread + CMPQ DX, $0x07 + JLE sequenceDecs_decodeSync_safe_bmi2_fill_2_end + SHLQ $0x08, AX + SUBQ $0x01, R12 + SUBQ $0x01, BX + SUBQ $0x08, DX + MOVBQZX (R12), CX + ORQ CX, AX + JMP sequenceDecs_decodeSync_safe_bmi2_fill_2_byte_by_byte + +sequenceDecs_decodeSync_safe_bmi2_fill_2_check_overread: + CMPQ DX, $0x40 + JA error_overread + +sequenceDecs_decodeSync_safe_bmi2_fill_2_end: + // Update literal length + MOVQ $0x00000808, CX + BEXTRQ CX, SI, R13 + MOVQ AX, R14 + LEAQ (DX)(R13*1), CX + ROLQ CL, R14 + BZHIQ R13, R14, R14 + MOVQ CX, DX + MOVQ SI, CX + SHRQ $0x20, CX + ADDQ R14, CX + MOVQ CX, 24(SP) + + // Fill bitreader for state updates + MOVQ R12, (SP) + MOVQ $0x00000808, CX + BEXTRQ CX, R8, R12 + MOVQ ctx+16(FP), CX + CMPQ 96(CX), $0x00 + JZ sequenceDecs_decodeSync_safe_bmi2_skip_update + LEAQ (SI)(DI*1), R13 + ADDQ R8, R13 + MOVBQZX R13, R13 + LEAQ (DX)(R13*1), CX + MOVQ AX, R14 + MOVQ CX, DX + ROLQ CL, R14 + BZHIQ R13, R14, R14 + + // Update Offset State + BZHIQ R8, R14, CX + SHRXQ R8, R14, R14 + SHRL $0x10, R8 + ADDQ CX, R8 + + // Load ctx.ofTable + MOVQ ctx+16(FP), CX + MOVQ 48(CX), CX + MOVQ (CX)(R8*8), R8 + + // Update Match Length State + BZHIQ DI, R14, CX + SHRXQ DI, R14, R14 + SHRL $0x10, DI + ADDQ CX, DI + + // Load ctx.mlTable + MOVQ ctx+16(FP), CX + MOVQ 24(CX), CX + MOVQ (CX)(DI*8), DI + + // Update Literal Length State + BZHIQ SI, R14, CX + SHRL $0x10, SI + ADDQ CX, SI + + // Load ctx.llTable + MOVQ ctx+16(FP), CX + MOVQ (CX), CX + MOVQ (CX)(SI*8), SI + +sequenceDecs_decodeSync_safe_bmi2_skip_update: + // Adjust offset + MOVQ s+0(FP), CX + MOVQ 8(SP), R13 + CMPQ R12, $0x01 + JBE sequenceDecs_decodeSync_safe_bmi2_adjust_offsetB_1_or_0 + MOVUPS 144(CX), X0 + MOVQ R13, 144(CX) + MOVUPS X0, 152(CX) + JMP sequenceDecs_decodeSync_safe_bmi2_after_adjust + +sequenceDecs_decodeSync_safe_bmi2_adjust_offsetB_1_or_0: + CMPQ 24(SP), $0x00000000 + JNE sequenceDecs_decodeSync_safe_bmi2_adjust_offset_maybezero + INCQ R13 + JMP sequenceDecs_decodeSync_safe_bmi2_adjust_offset_nonzero + +sequenceDecs_decodeSync_safe_bmi2_adjust_offset_maybezero: + TESTQ R13, R13 + JNZ sequenceDecs_decodeSync_safe_bmi2_adjust_offset_nonzero + MOVQ 144(CX), R13 + JMP sequenceDecs_decodeSync_safe_bmi2_after_adjust + +sequenceDecs_decodeSync_safe_bmi2_adjust_offset_nonzero: + MOVQ R13, R12 + XORQ R14, R14 + MOVQ $-1, R15 + CMPQ R13, $0x03 + CMOVQEQ R14, R12 + CMOVQEQ R15, R14 + ADDQ 144(CX)(R12*8), R14 + JNZ sequenceDecs_decodeSync_safe_bmi2_adjust_temp_valid + MOVQ $0x00000001, R14 + +sequenceDecs_decodeSync_safe_bmi2_adjust_temp_valid: + CMPQ R13, $0x01 + JZ sequenceDecs_decodeSync_safe_bmi2_adjust_skip + MOVQ 152(CX), R12 + MOVQ R12, 160(CX) + +sequenceDecs_decodeSync_safe_bmi2_adjust_skip: + MOVQ 144(CX), R12 + MOVQ R12, 152(CX) + MOVQ R14, 144(CX) + MOVQ R14, R13 + +sequenceDecs_decodeSync_safe_bmi2_after_adjust: + MOVQ R13, 8(SP) + + // Check values + MOVQ 16(SP), CX + MOVQ 24(SP), R12 + LEAQ (CX)(R12*1), R14 + MOVQ s+0(FP), R15 + ADDQ R14, 256(R15) + MOVQ ctx+16(FP), R14 + SUBQ R12, 104(R14) + JS error_not_enough_literals + CMPQ CX, $0x00020002 + JA sequenceDecs_decodeSync_safe_bmi2_error_match_len_too_big + TESTQ R13, R13 + JNZ sequenceDecs_decodeSync_safe_bmi2_match_len_ofs_ok + TESTQ CX, CX + JNZ sequenceDecs_decodeSync_safe_bmi2_error_match_len_ofs_mismatch + +sequenceDecs_decodeSync_safe_bmi2_match_len_ofs_ok: + MOVQ 24(SP), CX + MOVQ 8(SP), R12 + MOVQ 16(SP), R13 + + // Check if we have enough space in s.out + LEAQ (CX)(R13*1), R14 + ADDQ R9, R14 + CMPQ R14, 32(SP) + JA error_not_enough_space + + // Copy literals + TESTQ CX, CX + JZ check_offset + MOVQ CX, R14 + SUBQ $0x10, R14 + JB copy_1_small + +copy_1_loop: + MOVUPS (R10), X0 + MOVUPS X0, (R9) + ADDQ $0x10, R10 + ADDQ $0x10, R9 + SUBQ $0x10, R14 + JAE copy_1_loop + LEAQ 16(R10)(R14*1), R10 + LEAQ 16(R9)(R14*1), R9 + MOVUPS -16(R10), X0 + MOVUPS X0, -16(R9) + JMP copy_1_end + +copy_1_small: + CMPQ CX, $0x03 + JE copy_1_move_3 + JB copy_1_move_1or2 + CMPQ CX, $0x08 + JB copy_1_move_4through7 + JMP copy_1_move_8through16 + +copy_1_move_1or2: + MOVB (R10), R14 + MOVB -1(R10)(CX*1), R15 + MOVB R14, (R9) + MOVB R15, -1(R9)(CX*1) + ADDQ CX, R10 + ADDQ CX, R9 + JMP copy_1_end + +copy_1_move_3: + MOVW (R10), R14 + MOVB 2(R10), R15 + MOVW R14, (R9) + MOVB R15, 2(R9) + ADDQ CX, R10 + ADDQ CX, R9 + JMP copy_1_end + +copy_1_move_4through7: + MOVL (R10), R14 + MOVL -4(R10)(CX*1), R15 + MOVL R14, (R9) + MOVL R15, -4(R9)(CX*1) + ADDQ CX, R10 + ADDQ CX, R9 + JMP copy_1_end + +copy_1_move_8through16: + MOVQ (R10), R14 + MOVQ -8(R10)(CX*1), R15 + MOVQ R14, (R9) + MOVQ R15, -8(R9)(CX*1) + ADDQ CX, R10 + ADDQ CX, R9 + +copy_1_end: + ADDQ CX, R11 + + // Malformed input if seq.mo > t+len(hist) || seq.mo > s.windowSize) +check_offset: + MOVQ R11, CX + ADDQ 40(SP), CX + CMPQ R12, CX + JG error_match_off_too_big + CMPQ R12, 56(SP) + JG error_match_off_too_big + + // Copy match from history + MOVQ R12, CX + SUBQ R11, CX + JLS copy_match + MOVQ 48(SP), R14 + SUBQ CX, R14 + CMPQ R13, CX + JG copy_all_from_history + MOVQ R13, CX + SUBQ $0x10, CX + JB copy_4_small + +copy_4_loop: + MOVUPS (R14), X0 + MOVUPS X0, (R9) + ADDQ $0x10, R14 + ADDQ $0x10, R9 + SUBQ $0x10, CX + JAE copy_4_loop + LEAQ 16(R14)(CX*1), R14 + LEAQ 16(R9)(CX*1), R9 + MOVUPS -16(R14), X0 + MOVUPS X0, -16(R9) + JMP copy_4_end + +copy_4_small: + CMPQ R13, $0x03 + JE copy_4_move_3 + CMPQ R13, $0x08 + JB copy_4_move_4through7 + JMP copy_4_move_8through16 + +copy_4_move_3: + MOVW (R14), CX + MOVB 2(R14), R12 + MOVW CX, (R9) + MOVB R12, 2(R9) + ADDQ R13, R14 + ADDQ R13, R9 + JMP copy_4_end + +copy_4_move_4through7: + MOVL (R14), CX + MOVL -4(R14)(R13*1), R12 + MOVL CX, (R9) + MOVL R12, -4(R9)(R13*1) + ADDQ R13, R14 + ADDQ R13, R9 + JMP copy_4_end + +copy_4_move_8through16: + MOVQ (R14), CX + MOVQ -8(R14)(R13*1), R12 + MOVQ CX, (R9) + MOVQ R12, -8(R9)(R13*1) + ADDQ R13, R14 + ADDQ R13, R9 + +copy_4_end: + ADDQ R13, R11 + JMP handle_loop + JMP loop_finished + +copy_all_from_history: + MOVQ CX, R15 + SUBQ $0x10, R15 + JB copy_5_small + +copy_5_loop: + MOVUPS (R14), X0 + MOVUPS X0, (R9) + ADDQ $0x10, R14 + ADDQ $0x10, R9 + SUBQ $0x10, R15 + JAE copy_5_loop + LEAQ 16(R14)(R15*1), R14 + LEAQ 16(R9)(R15*1), R9 + MOVUPS -16(R14), X0 + MOVUPS X0, -16(R9) + JMP copy_5_end + +copy_5_small: + CMPQ CX, $0x03 + JE copy_5_move_3 + JB copy_5_move_1or2 + CMPQ CX, $0x08 + JB copy_5_move_4through7 + JMP copy_5_move_8through16 + +copy_5_move_1or2: + MOVB (R14), R15 + MOVB -1(R14)(CX*1), BP + MOVB R15, (R9) + MOVB BP, -1(R9)(CX*1) + ADDQ CX, R14 + ADDQ CX, R9 + JMP copy_5_end + +copy_5_move_3: + MOVW (R14), R15 + MOVB 2(R14), BP + MOVW R15, (R9) + MOVB BP, 2(R9) + ADDQ CX, R14 + ADDQ CX, R9 + JMP copy_5_end + +copy_5_move_4through7: + MOVL (R14), R15 + MOVL -4(R14)(CX*1), BP + MOVL R15, (R9) + MOVL BP, -4(R9)(CX*1) + ADDQ CX, R14 + ADDQ CX, R9 + JMP copy_5_end + +copy_5_move_8through16: + MOVQ (R14), R15 + MOVQ -8(R14)(CX*1), BP + MOVQ R15, (R9) + MOVQ BP, -8(R9)(CX*1) + ADDQ CX, R14 + ADDQ CX, R9 + +copy_5_end: + ADDQ CX, R11 + SUBQ CX, R13 + + // Copy match from the current buffer +copy_match: + MOVQ R9, CX + SUBQ R12, CX + + // ml <= mo + CMPQ R13, R12 + JA copy_overlapping_match + + // Copy non-overlapping match + ADDQ R13, R11 + MOVQ R13, R12 + SUBQ $0x10, R12 + JB copy_2_small + +copy_2_loop: + MOVUPS (CX), X0 + MOVUPS X0, (R9) + ADDQ $0x10, CX + ADDQ $0x10, R9 + SUBQ $0x10, R12 + JAE copy_2_loop + LEAQ 16(CX)(R12*1), CX + LEAQ 16(R9)(R12*1), R9 + MOVUPS -16(CX), X0 + MOVUPS X0, -16(R9) + JMP copy_2_end + +copy_2_small: + CMPQ R13, $0x03 + JE copy_2_move_3 + JB copy_2_move_1or2 + CMPQ R13, $0x08 + JB copy_2_move_4through7 + JMP copy_2_move_8through16 + +copy_2_move_1or2: + MOVB (CX), R12 + MOVB -1(CX)(R13*1), R14 + MOVB R12, (R9) + MOVB R14, -1(R9)(R13*1) + ADDQ R13, CX + ADDQ R13, R9 + JMP copy_2_end + +copy_2_move_3: + MOVW (CX), R12 + MOVB 2(CX), R14 + MOVW R12, (R9) + MOVB R14, 2(R9) + ADDQ R13, CX + ADDQ R13, R9 + JMP copy_2_end + +copy_2_move_4through7: + MOVL (CX), R12 + MOVL -4(CX)(R13*1), R14 + MOVL R12, (R9) + MOVL R14, -4(R9)(R13*1) + ADDQ R13, CX + ADDQ R13, R9 + JMP copy_2_end + +copy_2_move_8through16: + MOVQ (CX), R12 + MOVQ -8(CX)(R13*1), R14 + MOVQ R12, (R9) + MOVQ R14, -8(R9)(R13*1) + ADDQ R13, CX + ADDQ R13, R9 + +copy_2_end: + JMP handle_loop + + // Copy overlapping match +copy_overlapping_match: + ADDQ R13, R11 + +copy_slow_3: + MOVB (CX), R12 + MOVB R12, (R9) + INCQ CX + INCQ R9 + DECQ R13 + JNZ copy_slow_3 + +handle_loop: + MOVQ ctx+16(FP), CX + DECQ 96(CX) + JNS sequenceDecs_decodeSync_safe_bmi2_main_loop + +loop_finished: + MOVQ br+8(FP), CX + MOVQ AX, 24(CX) + MOVB DL, 40(CX) + MOVQ BX, 32(CX) + + // Update the context + MOVQ ctx+16(FP), AX + MOVQ R11, 136(AX) + MOVQ 144(AX), CX + SUBQ CX, R10 + MOVQ R10, 168(AX) + + // Return success + MOVQ $0x00000000, ret+24(FP) + RET + + // Return with match length error +sequenceDecs_decodeSync_safe_bmi2_error_match_len_ofs_mismatch: + MOVQ 16(SP), AX + MOVQ ctx+16(FP), CX + MOVQ AX, 216(CX) + MOVQ $0x00000001, ret+24(FP) + RET + + // Return with match too long error +sequenceDecs_decodeSync_safe_bmi2_error_match_len_too_big: + MOVQ ctx+16(FP), AX + MOVQ 16(SP), CX + MOVQ CX, 216(AX) + MOVQ $0x00000002, ret+24(FP) + RET + + // Return with match offset too long error +error_match_off_too_big: + MOVQ ctx+16(FP), AX + MOVQ 8(SP), CX + MOVQ CX, 224(AX) + MOVQ R11, 136(AX) + MOVQ $0x00000003, ret+24(FP) + RET + + // Return with not enough literals error +error_not_enough_literals: + MOVQ ctx+16(FP), AX + MOVQ 24(SP), CX + MOVQ CX, 208(AX) + MOVQ $0x00000004, ret+24(FP) + RET + + // Return with overread error +error_overread: + MOVQ $0x00000006, ret+24(FP) + RET + + // Return with not enough output space error +error_not_enough_space: + MOVQ ctx+16(FP), AX + MOVQ 24(SP), CX + MOVQ CX, 208(AX) + MOVQ 16(SP), CX + MOVQ CX, 216(AX) + MOVQ R11, 136(AX) + MOVQ $0x00000005, ret+24(FP) + RET diff --git a/backend/vendor/github.com/klauspost/compress/zstd/seqdec_generic.go b/backend/vendor/github.com/klauspost/compress/zstd/seqdec_generic.go new file mode 100644 index 0000000..7cec219 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/seqdec_generic.go @@ -0,0 +1,237 @@ +//go:build !amd64 || appengine || !gc || noasm +// +build !amd64 appengine !gc noasm + +package zstd + +import ( + "fmt" + "io" +) + +// decode sequences from the stream with the provided history but without dictionary. +func (s *sequenceDecs) decodeSyncSimple(hist []byte) (bool, error) { + return false, nil +} + +// decode sequences from the stream without the provided history. +func (s *sequenceDecs) decode(seqs []seqVals) error { + br := s.br + + // Grab full sizes tables, to avoid bounds checks. + llTable, mlTable, ofTable := s.litLengths.fse.dt[:maxTablesize], s.matchLengths.fse.dt[:maxTablesize], s.offsets.fse.dt[:maxTablesize] + llState, mlState, ofState := s.litLengths.state.state, s.matchLengths.state.state, s.offsets.state.state + s.seqSize = 0 + litRemain := len(s.literals) + + maxBlockSize := maxCompressedBlockSize + if s.windowSize < maxBlockSize { + maxBlockSize = s.windowSize + } + for i := range seqs { + var ll, mo, ml int + if br.cursor > 4+((maxOffsetBits+16+16)>>3) { + // inlined function: + // ll, mo, ml = s.nextFast(br, llState, mlState, ofState) + + // Final will not read from stream. + var llB, mlB, moB uint8 + ll, llB = llState.final() + ml, mlB = mlState.final() + mo, moB = ofState.final() + + // extra bits are stored in reverse order. + br.fillFast() + mo += br.getBits(moB) + if s.maxBits > 32 { + br.fillFast() + } + ml += br.getBits(mlB) + ll += br.getBits(llB) + + if moB > 1 { + s.prevOffset[2] = s.prevOffset[1] + s.prevOffset[1] = s.prevOffset[0] + s.prevOffset[0] = mo + } else { + // mo = s.adjustOffset(mo, ll, moB) + // Inlined for rather big speedup + if ll == 0 { + // There is an exception though, when current sequence's literals_length = 0. + // In this case, repeated offsets are shifted by one, so an offset_value of 1 means Repeated_Offset2, + // an offset_value of 2 means Repeated_Offset3, and an offset_value of 3 means Repeated_Offset1 - 1_byte. + mo++ + } + + if mo == 0 { + mo = s.prevOffset[0] + } else { + var temp int + if mo == 3 { + temp = s.prevOffset[0] - 1 + } else { + temp = s.prevOffset[mo] + } + + if temp == 0 { + // 0 is not valid; input is corrupted; force offset to 1 + println("WARNING: temp was 0") + temp = 1 + } + + if mo != 1 { + s.prevOffset[2] = s.prevOffset[1] + } + s.prevOffset[1] = s.prevOffset[0] + s.prevOffset[0] = temp + mo = temp + } + } + br.fillFast() + } else { + if br.overread() { + if debugDecoder { + printf("reading sequence %d, exceeded available data\n", i) + } + return io.ErrUnexpectedEOF + } + ll, mo, ml = s.next(br, llState, mlState, ofState) + br.fill() + } + + if debugSequences { + println("Seq", i, "Litlen:", ll, "mo:", mo, "(abs) ml:", ml) + } + // Evaluate. + // We might be doing this async, so do it early. + if mo == 0 && ml > 0 { + return fmt.Errorf("zero matchoff and matchlen (%d) > 0", ml) + } + if ml > maxMatchLen { + return fmt.Errorf("match len (%d) bigger than max allowed length", ml) + } + s.seqSize += ll + ml + if s.seqSize > maxBlockSize { + return fmt.Errorf("output bigger than max block size (%d)", maxBlockSize) + } + litRemain -= ll + if litRemain < 0 { + return fmt.Errorf("unexpected literal count, want %d bytes, but only %d is available", ll, litRemain+ll) + } + seqs[i] = seqVals{ + ll: ll, + ml: ml, + mo: mo, + } + if i == len(seqs)-1 { + // This is the last sequence, so we shouldn't update state. + break + } + + // Manually inlined, ~ 5-20% faster + // Update all 3 states at once. Approx 20% faster. + nBits := llState.nbBits() + mlState.nbBits() + ofState.nbBits() + if nBits == 0 { + llState = llTable[llState.newState()&maxTableMask] + mlState = mlTable[mlState.newState()&maxTableMask] + ofState = ofTable[ofState.newState()&maxTableMask] + } else { + bits := br.get32BitsFast(nBits) + lowBits := uint16(bits >> ((ofState.nbBits() + mlState.nbBits()) & 31)) + llState = llTable[(llState.newState()+lowBits)&maxTableMask] + + lowBits = uint16(bits >> (ofState.nbBits() & 31)) + lowBits &= bitMask[mlState.nbBits()&15] + mlState = mlTable[(mlState.newState()+lowBits)&maxTableMask] + + lowBits = uint16(bits) & bitMask[ofState.nbBits()&15] + ofState = ofTable[(ofState.newState()+lowBits)&maxTableMask] + } + } + s.seqSize += litRemain + if s.seqSize > maxBlockSize { + return fmt.Errorf("output bigger than max block size (%d)", maxBlockSize) + } + err := br.close() + if err != nil { + printf("Closing sequences: %v, %+v\n", err, *br) + } + return err +} + +// executeSimple handles cases when a dictionary is not used. +func (s *sequenceDecs) executeSimple(seqs []seqVals, hist []byte) error { + // Ensure we have enough output size... + if len(s.out)+s.seqSize > cap(s.out) { + addBytes := s.seqSize + len(s.out) + s.out = append(s.out, make([]byte, addBytes)...) + s.out = s.out[:len(s.out)-addBytes] + } + + if debugDecoder { + printf("Execute %d seqs with literals: %d into %d bytes\n", len(seqs), len(s.literals), s.seqSize) + } + + var t = len(s.out) + out := s.out[:t+s.seqSize] + + for _, seq := range seqs { + // Add literals + copy(out[t:], s.literals[:seq.ll]) + t += seq.ll + s.literals = s.literals[seq.ll:] + + // Malformed input + if seq.mo > t+len(hist) || seq.mo > s.windowSize { + return fmt.Errorf("match offset (%d) bigger than current history (%d)", seq.mo, t+len(hist)) + } + + // Copy from history. + if v := seq.mo - t; v > 0 { + // v is the start position in history from end. + start := len(hist) - v + if seq.ml > v { + // Some goes into the current block. + // Copy remainder of history + copy(out[t:], hist[start:]) + t += v + seq.ml -= v + } else { + copy(out[t:], hist[start:start+seq.ml]) + t += seq.ml + continue + } + } + + // We must be in the current buffer now + if seq.ml > 0 { + start := t - seq.mo + if seq.ml <= t-start { + // No overlap + copy(out[t:], out[start:start+seq.ml]) + t += seq.ml + } else { + // Overlapping copy + // Extend destination slice and copy one byte at the time. + src := out[start : start+seq.ml] + dst := out[t:] + dst = dst[:len(src)] + t += len(src) + // Destination is the space we just added. + for i := range src { + dst[i] = src[i] + } + } + } + } + // Add final literals + copy(out[t:], s.literals) + if debugDecoder { + t += len(s.literals) + if t != len(out) { + panic(fmt.Errorf("length mismatch, want %d, got %d, ss: %d", len(out), t, s.seqSize)) + } + } + s.out = out + + return nil +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/seqenc.go b/backend/vendor/github.com/klauspost/compress/zstd/seqenc.go new file mode 100644 index 0000000..65045ea --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/seqenc.go @@ -0,0 +1,112 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import "math/bits" + +type seqCoders struct { + llEnc, ofEnc, mlEnc *fseEncoder + llPrev, ofPrev, mlPrev *fseEncoder +} + +// swap coders with another (block). +func (s *seqCoders) swap(other *seqCoders) { + *s, *other = *other, *s +} + +// setPrev will update the previous encoders to the actually used ones +// and make sure a fresh one is in the main slot. +func (s *seqCoders) setPrev(ll, ml, of *fseEncoder) { + compareSwap := func(used *fseEncoder, current, prev **fseEncoder) { + // We used the new one, more current to history and reuse the previous history + if *current == used { + *prev, *current = *current, *prev + c := *current + p := *prev + c.reUsed = false + p.reUsed = true + return + } + if used == *prev { + return + } + // Ensure we cannot reuse by accident + prevEnc := *prev + prevEnc.symbolLen = 0 + } + compareSwap(ll, &s.llEnc, &s.llPrev) + compareSwap(ml, &s.mlEnc, &s.mlPrev) + compareSwap(of, &s.ofEnc, &s.ofPrev) +} + +func highBit(val uint32) (n uint32) { + return uint32(bits.Len32(val) - 1) +} + +var llCodeTable = [64]byte{0, 1, 2, 3, 4, 5, 6, 7, + 8, 9, 10, 11, 12, 13, 14, 15, + 16, 16, 17, 17, 18, 18, 19, 19, + 20, 20, 20, 20, 21, 21, 21, 21, + 22, 22, 22, 22, 22, 22, 22, 22, + 23, 23, 23, 23, 23, 23, 23, 23, + 24, 24, 24, 24, 24, 24, 24, 24, + 24, 24, 24, 24, 24, 24, 24, 24} + +// Up to 6 bits +const maxLLCode = 35 + +// llBitsTable translates from ll code to number of bits. +var llBitsTable = [maxLLCode + 1]byte{ + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 1, 1, 1, 1, 2, 2, 3, 3, + 4, 6, 7, 8, 9, 10, 11, 12, + 13, 14, 15, 16} + +// llCode returns the code that represents the literal length requested. +func llCode(litLength uint32) uint8 { + const llDeltaCode = 19 + if litLength <= 63 { + return llCodeTable[litLength&63] + } + return uint8(highBit(litLength)) + llDeltaCode +} + +var mlCodeTable = [128]byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, + 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 36, 36, 37, 37, 37, 37, + 38, 38, 38, 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, 39, 39, 39, + 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, + 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, + 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, + 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42} + +// Up to 6 bits +const maxMLCode = 52 + +// mlBitsTable translates from ml code to number of bits. +var mlBitsTable = [maxMLCode + 1]byte{ + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 1, 1, 1, 1, 2, 2, 3, 3, + 4, 4, 5, 7, 8, 9, 10, 11, + 12, 13, 14, 15, 16} + +// note : mlBase = matchLength - MINMATCH; +// because it's the format it's stored in seqStore->sequences +func mlCode(mlBase uint32) uint8 { + const mlDeltaCode = 36 + if mlBase <= 127 { + return mlCodeTable[mlBase&127] + } + return uint8(highBit(mlBase)) + mlDeltaCode +} + +func ofCode(offset uint32) uint8 { + // A valid offset will always be > 0. + return uint8(bits.Len32(offset) - 1) +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/simple_go124.go b/backend/vendor/github.com/klauspost/compress/zstd/simple_go124.go new file mode 100644 index 0000000..2efc049 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/simple_go124.go @@ -0,0 +1,56 @@ +// Copyright 2025+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. + +//go:build go1.24 + +package zstd + +import ( + "errors" + "runtime" + "sync" + "weak" +) + +var weakMu sync.Mutex +var simpleEnc weak.Pointer[Encoder] +var simpleDec weak.Pointer[Decoder] + +// EncodeTo appends the encoded data from src to dst. +func EncodeTo(dst []byte, src []byte) []byte { + weakMu.Lock() + enc := simpleEnc.Value() + if enc == nil { + var err error + enc, err = NewWriter(nil, WithEncoderConcurrency(runtime.NumCPU()), WithWindowSize(1<<20), WithLowerEncoderMem(true), WithZeroFrames(true)) + if err != nil { + panic("failed to create simple encoder: " + err.Error()) + } + simpleEnc = weak.Make(enc) + } + weakMu.Unlock() + + return enc.EncodeAll(src, dst) +} + +// DecodeTo appends the decoded data from src to dst. +// The maximum decoded size is 1GiB, +// not including what may already be in dst. +func DecodeTo(dst []byte, src []byte) ([]byte, error) { + weakMu.Lock() + dec := simpleDec.Value() + if dec == nil { + var err error + dec, err = NewReader(nil, WithDecoderConcurrency(runtime.NumCPU()), WithDecoderLowmem(true), WithDecoderMaxMemory(1<<30)) + if err != nil { + weakMu.Unlock() + return nil, errors.New("failed to create simple decoder: " + err.Error()) + } + runtime.SetFinalizer(dec, func(d *Decoder) { + d.Close() + }) + simpleDec = weak.Make(dec) + } + weakMu.Unlock() + return dec.DecodeAll(src, dst) +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/snappy.go b/backend/vendor/github.com/klauspost/compress/zstd/snappy.go new file mode 100644 index 0000000..336c288 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/snappy.go @@ -0,0 +1,434 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. +// Based on work by Yann Collet, released under BSD License. + +package zstd + +import ( + "encoding/binary" + "errors" + "hash/crc32" + "io" + + "github.com/klauspost/compress/huff0" + snappy "github.com/klauspost/compress/internal/snapref" +) + +const ( + snappyTagLiteral = 0x00 + snappyTagCopy1 = 0x01 + snappyTagCopy2 = 0x02 + snappyTagCopy4 = 0x03 +) + +const ( + snappyChecksumSize = 4 + snappyMagicBody = "sNaPpY" + + // snappyMaxBlockSize is the maximum size of the input to encodeBlock. It is not + // part of the wire format per se, but some parts of the encoder assume + // that an offset fits into a uint16. + // + // Also, for the framing format (Writer type instead of Encode function), + // https://github.com/google/snappy/blob/master/framing_format.txt says + // that "the uncompressed data in a chunk must be no longer than 65536 + // bytes". + snappyMaxBlockSize = 65536 + + // snappyMaxEncodedLenOfMaxBlockSize equals MaxEncodedLen(snappyMaxBlockSize), but is + // hard coded to be a const instead of a variable, so that obufLen can also + // be a const. Their equivalence is confirmed by + // TestMaxEncodedLenOfMaxBlockSize. + snappyMaxEncodedLenOfMaxBlockSize = 76490 +) + +const ( + chunkTypeCompressedData = 0x00 + chunkTypeUncompressedData = 0x01 + chunkTypePadding = 0xfe + chunkTypeStreamIdentifier = 0xff +) + +var ( + // ErrSnappyCorrupt reports that the input is invalid. + ErrSnappyCorrupt = errors.New("snappy: corrupt input") + // ErrSnappyTooLarge reports that the uncompressed length is too large. + ErrSnappyTooLarge = errors.New("snappy: decoded block is too large") + // ErrSnappyUnsupported reports that the input isn't supported. + ErrSnappyUnsupported = errors.New("snappy: unsupported input") + + errUnsupportedLiteralLength = errors.New("snappy: unsupported literal length") +) + +// SnappyConverter can read SnappyConverter-compressed streams and convert them to zstd. +// Conversion is done by converting the stream directly from Snappy without intermediate +// full decoding. +// Therefore the compression ratio is much less than what can be done by a full decompression +// and compression, and a faulty Snappy stream may lead to a faulty Zstandard stream without +// any errors being generated. +// No CRC value is being generated and not all CRC values of the Snappy stream are checked. +// However, it provides really fast recompression of Snappy streams. +// The converter can be reused to avoid allocations, even after errors. +type SnappyConverter struct { + r io.Reader + err error + buf []byte + block *blockEnc +} + +// Convert the Snappy stream supplied in 'in' and write the zStandard stream to 'w'. +// If any error is detected on the Snappy stream it is returned. +// The number of bytes written is returned. +func (r *SnappyConverter) Convert(in io.Reader, w io.Writer) (int64, error) { + initPredefined() + r.err = nil + r.r = in + if r.block == nil { + r.block = &blockEnc{} + r.block.init() + } + r.block.initNewEncode() + if len(r.buf) != snappyMaxEncodedLenOfMaxBlockSize+snappyChecksumSize { + r.buf = make([]byte, snappyMaxEncodedLenOfMaxBlockSize+snappyChecksumSize) + } + r.block.litEnc.Reuse = huff0.ReusePolicyNone + var written int64 + var readHeader bool + { + header := frameHeader{WindowSize: snappyMaxBlockSize}.appendTo(r.buf[:0]) + + var n int + n, r.err = w.Write(header) + if r.err != nil { + return written, r.err + } + written += int64(n) + } + + for { + if !r.readFull(r.buf[:4], true) { + // Add empty last block + r.block.reset(nil) + r.block.last = true + err := r.block.encodeLits(r.block.literals, false) + if err != nil { + return written, err + } + n, err := w.Write(r.block.output) + if err != nil { + return written, err + } + written += int64(n) + + return written, r.err + } + chunkType := r.buf[0] + if !readHeader { + if chunkType != chunkTypeStreamIdentifier { + println("chunkType != chunkTypeStreamIdentifier", chunkType) + r.err = ErrSnappyCorrupt + return written, r.err + } + readHeader = true + } + chunkLen := int(r.buf[1]) | int(r.buf[2])<<8 | int(r.buf[3])<<16 + if chunkLen > len(r.buf) { + println("chunkLen > len(r.buf)", chunkType) + r.err = ErrSnappyUnsupported + return written, r.err + } + + // The chunk types are specified at + // https://github.com/google/snappy/blob/master/framing_format.txt + switch chunkType { + case chunkTypeCompressedData: + // Section 4.2. Compressed data (chunk type 0x00). + if chunkLen < snappyChecksumSize { + println("chunkLen < snappyChecksumSize", chunkLen, snappyChecksumSize) + r.err = ErrSnappyCorrupt + return written, r.err + } + buf := r.buf[:chunkLen] + if !r.readFull(buf, false) { + return written, r.err + } + //checksum := uint32(buf[0]) | uint32(buf[1])<<8 | uint32(buf[2])<<16 | uint32(buf[3])<<24 + buf = buf[snappyChecksumSize:] + + n, hdr, err := snappyDecodedLen(buf) + if err != nil { + r.err = err + return written, r.err + } + buf = buf[hdr:] + if n > snappyMaxBlockSize { + println("n > snappyMaxBlockSize", n, snappyMaxBlockSize) + r.err = ErrSnappyCorrupt + return written, r.err + } + r.block.reset(nil) + r.block.pushOffsets() + if err := decodeSnappy(r.block, buf); err != nil { + r.err = err + return written, r.err + } + if r.block.size+r.block.extraLits != n { + printf("invalid size, want %d, got %d\n", n, r.block.size+r.block.extraLits) + r.err = ErrSnappyCorrupt + return written, r.err + } + err = r.block.encode(nil, false, false) + switch err { + case errIncompressible: + r.block.popOffsets() + r.block.reset(nil) + r.block.literals, err = snappy.Decode(r.block.literals[:n], r.buf[snappyChecksumSize:chunkLen]) + if err != nil { + return written, err + } + err = r.block.encodeLits(r.block.literals, false) + if err != nil { + return written, err + } + case nil: + default: + return written, err + } + + n, r.err = w.Write(r.block.output) + if r.err != nil { + return written, r.err + } + written += int64(n) + continue + case chunkTypeUncompressedData: + if debugEncoder { + println("Uncompressed, chunklen", chunkLen) + } + // Section 4.3. Uncompressed data (chunk type 0x01). + if chunkLen < snappyChecksumSize { + println("chunkLen < snappyChecksumSize", chunkLen, snappyChecksumSize) + r.err = ErrSnappyCorrupt + return written, r.err + } + r.block.reset(nil) + buf := r.buf[:snappyChecksumSize] + if !r.readFull(buf, false) { + return written, r.err + } + checksum := uint32(buf[0]) | uint32(buf[1])<<8 | uint32(buf[2])<<16 | uint32(buf[3])<<24 + // Read directly into r.decoded instead of via r.buf. + n := chunkLen - snappyChecksumSize + if n > snappyMaxBlockSize { + println("n > snappyMaxBlockSize", n, snappyMaxBlockSize) + r.err = ErrSnappyCorrupt + return written, r.err + } + r.block.literals = r.block.literals[:n] + if !r.readFull(r.block.literals, false) { + return written, r.err + } + if snappyCRC(r.block.literals) != checksum { + println("literals crc mismatch") + r.err = ErrSnappyCorrupt + return written, r.err + } + err := r.block.encodeLits(r.block.literals, false) + if err != nil { + return written, err + } + n, r.err = w.Write(r.block.output) + if r.err != nil { + return written, r.err + } + written += int64(n) + continue + + case chunkTypeStreamIdentifier: + if debugEncoder { + println("stream id", chunkLen, len(snappyMagicBody)) + } + // Section 4.1. Stream identifier (chunk type 0xff). + if chunkLen != len(snappyMagicBody) { + println("chunkLen != len(snappyMagicBody)", chunkLen, len(snappyMagicBody)) + r.err = ErrSnappyCorrupt + return written, r.err + } + if !r.readFull(r.buf[:len(snappyMagicBody)], false) { + return written, r.err + } + for i := range len(snappyMagicBody) { + if r.buf[i] != snappyMagicBody[i] { + println("r.buf[i] != snappyMagicBody[i]", r.buf[i], snappyMagicBody[i], i) + r.err = ErrSnappyCorrupt + return written, r.err + } + } + continue + } + + if chunkType <= 0x7f { + // Section 4.5. Reserved unskippable chunks (chunk types 0x02-0x7f). + println("chunkType <= 0x7f") + r.err = ErrSnappyUnsupported + return written, r.err + } + // Section 4.4 Padding (chunk type 0xfe). + // Section 4.6. Reserved skippable chunks (chunk types 0x80-0xfd). + if !r.readFull(r.buf[:chunkLen], false) { + return written, r.err + } + } +} + +// decodeSnappy writes the decoding of src to dst. It assumes that the varint-encoded +// length of the decompressed bytes has already been read. +func decodeSnappy(blk *blockEnc, src []byte) error { + //decodeRef(make([]byte, snappyMaxBlockSize), src) + var s, length int + lits := blk.extraLits + var offset uint32 + for s < len(src) { + switch src[s] & 0x03 { + case snappyTagLiteral: + x := uint32(src[s] >> 2) + switch { + case x < 60: + s++ + case x == 60: + s += 2 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + println("uint(s) > uint(len(src)", s, src) + return ErrSnappyCorrupt + } + x = uint32(src[s-1]) + case x == 61: + s += 3 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + println("uint(s) > uint(len(src)", s, src) + return ErrSnappyCorrupt + } + x = uint32(src[s-2]) | uint32(src[s-1])<<8 + case x == 62: + s += 4 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + println("uint(s) > uint(len(src)", s, src) + return ErrSnappyCorrupt + } + x = uint32(src[s-3]) | uint32(src[s-2])<<8 | uint32(src[s-1])<<16 + case x == 63: + s += 5 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + println("uint(s) > uint(len(src)", s, src) + return ErrSnappyCorrupt + } + x = uint32(src[s-4]) | uint32(src[s-3])<<8 | uint32(src[s-2])<<16 | uint32(src[s-1])<<24 + } + if x > snappyMaxBlockSize { + println("x > snappyMaxBlockSize", x, snappyMaxBlockSize) + return ErrSnappyCorrupt + } + length = int(x) + 1 + if length <= 0 { + println("length <= 0 ", length) + + return errUnsupportedLiteralLength + } + //if length > snappyMaxBlockSize-d || uint32(length) > len(src)-s { + // return ErrSnappyCorrupt + //} + + blk.literals = append(blk.literals, src[s:s+length]...) + //println(length, "litLen") + lits += length + s += length + continue + + case snappyTagCopy1: + s += 2 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + println("uint(s) > uint(len(src)", s, len(src)) + return ErrSnappyCorrupt + } + length = 4 + int(src[s-2])>>2&0x7 + offset = uint32(src[s-2])&0xe0<<3 | uint32(src[s-1]) + + case snappyTagCopy2: + s += 3 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + println("uint(s) > uint(len(src)", s, len(src)) + return ErrSnappyCorrupt + } + length = 1 + int(src[s-3])>>2 + offset = uint32(src[s-2]) | uint32(src[s-1])<<8 + + case snappyTagCopy4: + s += 5 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + println("uint(s) > uint(len(src)", s, len(src)) + return ErrSnappyCorrupt + } + length = 1 + int(src[s-5])>>2 + offset = uint32(src[s-4]) | uint32(src[s-3])<<8 | uint32(src[s-2])<<16 | uint32(src[s-1])<<24 + } + + if offset <= 0 || blk.size+lits < int(offset) /*|| length > len(blk)-d */ { + println("offset <= 0 || blk.size+lits < int(offset)", offset, blk.size+lits, int(offset), blk.size, lits) + + return ErrSnappyCorrupt + } + + // Check if offset is one of the recent offsets. + // Adjusts the output offset accordingly. + // Gives a tiny bit of compression, typically around 1%. + if false { + offset = blk.matchOffset(offset, uint32(lits)) + } else { + offset += 3 + } + + blk.sequences = append(blk.sequences, seq{ + litLen: uint32(lits), + offset: offset, + matchLen: uint32(length) - zstdMinMatch, + }) + blk.size += length + lits + lits = 0 + } + blk.extraLits = lits + return nil +} + +func (r *SnappyConverter) readFull(p []byte, allowEOF bool) (ok bool) { + if _, r.err = io.ReadFull(r.r, p); r.err != nil { + if r.err == io.ErrUnexpectedEOF || (r.err == io.EOF && !allowEOF) { + r.err = ErrSnappyCorrupt + } + return false + } + return true +} + +var crcTable = crc32.MakeTable(crc32.Castagnoli) + +// crc implements the checksum specified in section 3 of +// https://github.com/google/snappy/blob/master/framing_format.txt +func snappyCRC(b []byte) uint32 { + c := crc32.Update(0, crcTable, b) + return c>>15 | c<<17 + 0xa282ead8 +} + +// snappyDecodedLen returns the length of the decoded block and the number of bytes +// that the length header occupied. +func snappyDecodedLen(src []byte) (blockLen, headerLen int, err error) { + v, n := binary.Uvarint(src) + if n <= 0 || v > 0xffffffff { + return 0, 0, ErrSnappyCorrupt + } + + const wordSize = 32 << (^uint(0) >> 32 & 1) + if wordSize == 32 && v > 0x7fffffff { + return 0, 0, ErrSnappyTooLarge + } + return int(v), n, nil +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/zip.go b/backend/vendor/github.com/klauspost/compress/zstd/zip.go new file mode 100644 index 0000000..3198d71 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/zip.go @@ -0,0 +1,141 @@ +// Copyright 2019+ Klaus Post. All rights reserved. +// License information can be found in the LICENSE file. + +package zstd + +import ( + "errors" + "io" + "sync" +) + +// ZipMethodWinZip is the method for Zstandard compressed data inside Zip files for WinZip. +// See https://www.winzip.com/win/en/comp_info.html +const ZipMethodWinZip = 93 + +// ZipMethodPKWare is the original method number used by PKWARE to indicate Zstandard compression. +// Deprecated: This has been deprecated by PKWARE, use ZipMethodWinZip instead for compression. +// See https://pkware.cachefly.net/webdocs/APPNOTE/APPNOTE-6.3.9.TXT +const ZipMethodPKWare = 20 + +// zipReaderPool is the default reader pool. +var zipReaderPool = sync.Pool{New: func() any { + z, err := NewReader(nil, WithDecoderLowmem(true), WithDecoderMaxWindow(128<<20), WithDecoderConcurrency(1)) + if err != nil { + panic(err) + } + return z +}} + +// newZipReader creates a pooled zip decompressor. +func newZipReader(opts ...DOption) func(r io.Reader) io.ReadCloser { + pool := &zipReaderPool + if len(opts) > 0 { + opts = append([]DOption{WithDecoderLowmem(true), WithDecoderMaxWindow(128 << 20)}, opts...) + // Force concurrency 1 + opts = append(opts, WithDecoderConcurrency(1)) + // Create our own pool + pool = &sync.Pool{} + } + return func(r io.Reader) io.ReadCloser { + dec, ok := pool.Get().(*Decoder) + if ok { + dec.Reset(r) + } else { + d, err := NewReader(r, opts...) + if err != nil { + panic(err) + } + dec = d + } + return &pooledZipReader{dec: dec, pool: pool} + } +} + +type pooledZipReader struct { + mu sync.Mutex // guards Close and Read + pool *sync.Pool + dec *Decoder +} + +func (r *pooledZipReader) Read(p []byte) (n int, err error) { + r.mu.Lock() + defer r.mu.Unlock() + if r.dec == nil { + return 0, errors.New("read after close or EOF") + } + dec, err := r.dec.Read(p) + if err == io.EOF { + r.dec.Reset(nil) + r.pool.Put(r.dec) + r.dec = nil + } + return dec, err +} + +func (r *pooledZipReader) Close() error { + r.mu.Lock() + defer r.mu.Unlock() + var err error + if r.dec != nil { + err = r.dec.Reset(nil) + r.pool.Put(r.dec) + r.dec = nil + } + return err +} + +type pooledZipWriter struct { + mu sync.Mutex // guards Close and Read + enc *Encoder + pool *sync.Pool +} + +func (w *pooledZipWriter) Write(p []byte) (n int, err error) { + w.mu.Lock() + defer w.mu.Unlock() + if w.enc == nil { + return 0, errors.New("Write after Close") + } + return w.enc.Write(p) +} + +func (w *pooledZipWriter) Close() error { + w.mu.Lock() + defer w.mu.Unlock() + var err error + if w.enc != nil { + err = w.enc.Close() + w.pool.Put(w.enc) + w.enc = nil + } + return err +} + +// ZipCompressor returns a compressor that can be registered with zip libraries. +// The provided encoder options will be used on all encodes. +func ZipCompressor(opts ...EOption) func(w io.Writer) (io.WriteCloser, error) { + var pool sync.Pool + return func(w io.Writer) (io.WriteCloser, error) { + enc, ok := pool.Get().(*Encoder) + if ok { + enc.Reset(w) + } else { + var err error + enc, err = NewWriter(w, opts...) + if err != nil { + return nil, err + } + } + return &pooledZipWriter{enc: enc, pool: &pool}, nil + } +} + +// ZipDecompressor returns a decompressor that can be registered with zip libraries. +// See ZipCompressor for example. +// Options can be specified. WithDecoderConcurrency(1) is forced, +// and by default a 128MB maximum decompression window is specified. +// The window size can be overridden if required. +func ZipDecompressor(opts ...DOption) func(r io.Reader) io.ReadCloser { + return newZipReader(opts...) +} diff --git a/backend/vendor/github.com/klauspost/compress/zstd/zstd.go b/backend/vendor/github.com/klauspost/compress/zstd/zstd.go new file mode 100644 index 0000000..1a86971 --- /dev/null +++ b/backend/vendor/github.com/klauspost/compress/zstd/zstd.go @@ -0,0 +1,126 @@ +// Package zstd provides decompression of zstandard files. +// +// For advanced usage and examples, go to the README: https://github.com/klauspost/compress/tree/master/zstd#zstd +package zstd + +import ( + "bytes" + "errors" + "log" + "math" + + "github.com/klauspost/compress/internal/le" +) + +// enable debug printing +const debug = false + +// enable encoding debug printing +const debugEncoder = debug + +// enable decoding debug printing +const debugDecoder = debug + +// Enable extra assertions. +const debugAsserts = debug || false + +// print sequence details +const debugSequences = false + +// print detailed matching information +const debugMatches = false + +// force encoder to use predefined tables. +const forcePreDef = false + +// zstdMinMatch is the minimum zstd match length. +const zstdMinMatch = 3 + +// fcsUnknown is used for unknown frame content size. +const fcsUnknown = math.MaxUint64 + +var ( + // ErrReservedBlockType is returned when a reserved block type is found. + // Typically this indicates wrong or corrupted input. + ErrReservedBlockType = errors.New("invalid input: reserved block type encountered") + + // ErrCompressedSizeTooBig is returned when a block is bigger than allowed. + // Typically this indicates wrong or corrupted input. + ErrCompressedSizeTooBig = errors.New("invalid input: compressed size too big") + + // ErrBlockTooSmall is returned when a block is too small to be decoded. + // Typically returned on invalid input. + ErrBlockTooSmall = errors.New("block too small") + + // ErrUnexpectedBlockSize is returned when a block has unexpected size. + // Typically returned on invalid input. + ErrUnexpectedBlockSize = errors.New("unexpected block size") + + // ErrMagicMismatch is returned when a "magic" number isn't what is expected. + // Typically this indicates wrong or corrupted input. + ErrMagicMismatch = errors.New("invalid input: magic number mismatch") + + // ErrWindowSizeExceeded is returned when a reference exceeds the valid window size. + // Typically this indicates wrong or corrupted input. + ErrWindowSizeExceeded = errors.New("window size exceeded") + + // ErrWindowSizeTooSmall is returned when no window size is specified. + // Typically this indicates wrong or corrupted input. + ErrWindowSizeTooSmall = errors.New("invalid input: window size was too small") + + // ErrDecoderSizeExceeded is returned if decompressed size exceeds the configured limit. + ErrDecoderSizeExceeded = errors.New("decompressed size exceeds configured limit") + + // ErrUnknownDictionary is returned if the dictionary ID is unknown. + ErrUnknownDictionary = errors.New("unknown dictionary") + + // ErrFrameSizeExceeded is returned if the stated frame size is exceeded. + // This is only returned if SingleSegment is specified on the frame. + ErrFrameSizeExceeded = errors.New("frame size exceeded") + + // ErrFrameSizeMismatch is returned if the stated frame size does not match the expected size. + // This is only returned if SingleSegment is specified on the frame. + ErrFrameSizeMismatch = errors.New("frame size does not match size on stream") + + // ErrCRCMismatch is returned if CRC mismatches. + ErrCRCMismatch = errors.New("CRC check failed") + + // ErrDecoderClosed will be returned if the Decoder was used after + // Close has been called. + ErrDecoderClosed = errors.New("decoder used after Close") + + // ErrEncoderClosed will be returned if the Encoder was used after + // Close has been called. + ErrEncoderClosed = errors.New("encoder used after Close") + + // ErrDecoderNilInput is returned when a nil Reader was provided + // and an operation other than Reset/DecodeAll/Close was attempted. + ErrDecoderNilInput = errors.New("nil input provided as reader") +) + +func println(a ...any) { + if debug || debugDecoder || debugEncoder { + log.Println(a...) + } +} + +func printf(format string, a ...any) { + if debug || debugDecoder || debugEncoder { + log.Printf(format, a...) + } +} + +func load3232(b []byte, i int32) uint32 { + return le.Load32(b, i) +} + +func load6432(b []byte, i int32) uint64 { + return le.Load64(b, i) +} + +type byter interface { + Bytes() []byte + Len() int +} + +var _ byter = &bytes.Buffer{} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/LICENSE b/backend/vendor/github.com/onsi/ginkgo/v2/LICENSE new file mode 100644 index 0000000..9415ee7 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/LICENSE @@ -0,0 +1,20 @@ +Copyright (c) 2013-2014 Onsi Fakhouri + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/config/deprecated.go b/backend/vendor/github.com/onsi/ginkgo/v2/config/deprecated.go new file mode 100644 index 0000000..a61021d --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/config/deprecated.go @@ -0,0 +1,69 @@ +package config + +// GinkgoConfigType has been deprecated and its equivalent now lives in +// the types package. You can no longer access Ginkgo configuration from the config +// package. Instead use the DSL's GinkgoConfiguration() function to get copies of the +// current configuration +// +// GinkgoConfigType is still here so custom V1 reporters do not result in a compilation error +// It will be removed in a future minor release of Ginkgo +type GinkgoConfigType = DeprecatedGinkgoConfigType +type DeprecatedGinkgoConfigType struct { + RandomSeed int64 + RandomizeAllSpecs bool + RegexScansFilePath bool + FocusStrings []string + SkipStrings []string + SkipMeasurements bool + FailOnPending bool + FailFast bool + FlakeAttempts int + EmitSpecProgress bool + DryRun bool + DebugParallel bool + + ParallelNode int + ParallelTotal int + SyncHost string + StreamHost string +} + +// DefaultReporterConfigType has been deprecated and its equivalent now lives in +// the types package. You can no longer access Ginkgo configuration from the config +// package. Instead use the DSL's GinkgoConfiguration() function to get copies of the +// current configuration +// +// DefaultReporterConfigType is still here so custom V1 reporters do not result in a compilation error +// It will be removed in a future minor release of Ginkgo +type DefaultReporterConfigType = DeprecatedDefaultReporterConfigType +type DeprecatedDefaultReporterConfigType struct { + NoColor bool + SlowSpecThreshold float64 + NoisyPendings bool + NoisySkippings bool + Succinct bool + Verbose bool + FullTrace bool + ReportPassed bool + ReportFile string +} + +// Sadly there is no way to gracefully deprecate access to these global config variables. +// Users who need access to Ginkgo's configuration should use the DSL's GinkgoConfiguration() method +// These new unwieldy type names exist to give users a hint when they try to compile and the compilation fails +type GinkgoConfigIsNoLongerAccessibleFromTheConfigPackageUseTheDSLsGinkgoConfigurationFunctionInstead struct{} + +// Sadly there is no way to gracefully deprecate access to these global config variables. +// Users who need access to Ginkgo's configuration should use the DSL's GinkgoConfiguration() method +// These new unwieldy type names exist to give users a hint when they try to compile and the compilation fails +var GinkgoConfig = GinkgoConfigIsNoLongerAccessibleFromTheConfigPackageUseTheDSLsGinkgoConfigurationFunctionInstead{} + +// Sadly there is no way to gracefully deprecate access to these global config variables. +// Users who need access to Ginkgo's configuration should use the DSL's GinkgoConfiguration() method +// These new unwieldy type names exist to give users a hint when they try to compile and the compilation fails +type DefaultReporterConfigIsNoLongerAccessibleFromTheConfigPackageUseTheDSLsGinkgoConfigurationFunctionInstead struct{} + +// Sadly there is no way to gracefully deprecate access to these global config variables. +// Users who need access to Ginkgo's configuration should use the DSL's GinkgoConfiguration() method +// These new unwieldy type names exist to give users a hint when they try to compile and the compilation fails +var DefaultReporterConfig = DefaultReporterConfigIsNoLongerAccessibleFromTheConfigPackageUseTheDSLsGinkgoConfigurationFunctionInstead{} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/formatter/colorable_others.go b/backend/vendor/github.com/onsi/ginkgo/v2/formatter/colorable_others.go new file mode 100644 index 0000000..778bfd7 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/formatter/colorable_others.go @@ -0,0 +1,41 @@ +// +build !windows + +/* +These packages are used for colorize on Windows and contributed by mattn.jp@gmail.com + + * go-colorable: + * go-isatty: + +The MIT License (MIT) + +Copyright (c) 2016 Yasuhiro Matsumoto + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. +*/ + +package formatter + +import ( + "io" + "os" +) + +func newColorable(file *os.File) io.Writer { + return file +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/formatter/colorable_windows.go b/backend/vendor/github.com/onsi/ginkgo/v2/formatter/colorable_windows.go new file mode 100644 index 0000000..dd1d143 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/formatter/colorable_windows.go @@ -0,0 +1,809 @@ +/* +These packages are used for colorize on Windows and contributed by mattn.jp@gmail.com + + * go-colorable: + * go-isatty: + +The MIT License (MIT) + +Copyright (c) 2016 Yasuhiro Matsumoto + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. +*/ + +package formatter + +import ( + "bytes" + "fmt" + "io" + "math" + "os" + "strconv" + "strings" + "syscall" + "unsafe" +) + +var ( + kernel32 = syscall.NewLazyDLL("kernel32.dll") + procGetConsoleScreenBufferInfo = kernel32.NewProc("GetConsoleScreenBufferInfo") + procSetConsoleTextAttribute = kernel32.NewProc("SetConsoleTextAttribute") + procSetConsoleCursorPosition = kernel32.NewProc("SetConsoleCursorPosition") + procFillConsoleOutputCharacter = kernel32.NewProc("FillConsoleOutputCharacterW") + procFillConsoleOutputAttribute = kernel32.NewProc("FillConsoleOutputAttribute") + procGetConsoleMode = kernel32.NewProc("GetConsoleMode") +) + +func isTerminal(fd uintptr) bool { + var st uint32 + r, _, e := syscall.Syscall(procGetConsoleMode.Addr(), 2, fd, uintptr(unsafe.Pointer(&st)), 0) + return r != 0 && e == 0 +} + +const ( + foregroundBlue = 0x1 + foregroundGreen = 0x2 + foregroundRed = 0x4 + foregroundIntensity = 0x8 + foregroundMask = (foregroundRed | foregroundBlue | foregroundGreen | foregroundIntensity) + backgroundBlue = 0x10 + backgroundGreen = 0x20 + backgroundRed = 0x40 + backgroundIntensity = 0x80 + backgroundMask = (backgroundRed | backgroundBlue | backgroundGreen | backgroundIntensity) +) + +type wchar uint16 +type short int16 +type dword uint32 +type word uint16 + +type coord struct { + x short + y short +} + +type smallRect struct { + left short + top short + right short + bottom short +} + +type consoleScreenBufferInfo struct { + size coord + cursorPosition coord + attributes word + window smallRect + maximumWindowSize coord +} + +type writer struct { + out io.Writer + handle syscall.Handle + lastbuf bytes.Buffer + oldattr word +} + +func newColorable(file *os.File) io.Writer { + if file == nil { + panic("nil passed instead of *os.File to NewColorable()") + } + + if isTerminal(file.Fd()) { + var csbi consoleScreenBufferInfo + handle := syscall.Handle(file.Fd()) + procGetConsoleScreenBufferInfo.Call(uintptr(handle), uintptr(unsafe.Pointer(&csbi))) + return &writer{out: file, handle: handle, oldattr: csbi.attributes} + } else { + return file + } +} + +var color256 = map[int]int{ + 0: 0x000000, + 1: 0x800000, + 2: 0x008000, + 3: 0x808000, + 4: 0x000080, + 5: 0x800080, + 6: 0x008080, + 7: 0xc0c0c0, + 8: 0x808080, + 9: 0xff0000, + 10: 0x00ff00, + 11: 0xffff00, + 12: 0x0000ff, + 13: 0xff00ff, + 14: 0x00ffff, + 15: 0xffffff, + 16: 0x000000, + 17: 0x00005f, + 18: 0x000087, + 19: 0x0000af, + 20: 0x0000d7, + 21: 0x0000ff, + 22: 0x005f00, + 23: 0x005f5f, + 24: 0x005f87, + 25: 0x005faf, + 26: 0x005fd7, + 27: 0x005fff, + 28: 0x008700, + 29: 0x00875f, + 30: 0x008787, + 31: 0x0087af, + 32: 0x0087d7, + 33: 0x0087ff, + 34: 0x00af00, + 35: 0x00af5f, + 36: 0x00af87, + 37: 0x00afaf, + 38: 0x00afd7, + 39: 0x00afff, + 40: 0x00d700, + 41: 0x00d75f, + 42: 0x00d787, + 43: 0x00d7af, + 44: 0x00d7d7, + 45: 0x00d7ff, + 46: 0x00ff00, + 47: 0x00ff5f, + 48: 0x00ff87, + 49: 0x00ffaf, + 50: 0x00ffd7, + 51: 0x00ffff, + 52: 0x5f0000, + 53: 0x5f005f, + 54: 0x5f0087, + 55: 0x5f00af, + 56: 0x5f00d7, + 57: 0x5f00ff, + 58: 0x5f5f00, + 59: 0x5f5f5f, + 60: 0x5f5f87, + 61: 0x5f5faf, + 62: 0x5f5fd7, + 63: 0x5f5fff, + 64: 0x5f8700, + 65: 0x5f875f, + 66: 0x5f8787, + 67: 0x5f87af, + 68: 0x5f87d7, + 69: 0x5f87ff, + 70: 0x5faf00, + 71: 0x5faf5f, + 72: 0x5faf87, + 73: 0x5fafaf, + 74: 0x5fafd7, + 75: 0x5fafff, + 76: 0x5fd700, + 77: 0x5fd75f, + 78: 0x5fd787, + 79: 0x5fd7af, + 80: 0x5fd7d7, + 81: 0x5fd7ff, + 82: 0x5fff00, + 83: 0x5fff5f, + 84: 0x5fff87, + 85: 0x5fffaf, + 86: 0x5fffd7, + 87: 0x5fffff, + 88: 0x870000, + 89: 0x87005f, + 90: 0x870087, + 91: 0x8700af, + 92: 0x8700d7, + 93: 0x8700ff, + 94: 0x875f00, + 95: 0x875f5f, + 96: 0x875f87, + 97: 0x875faf, + 98: 0x875fd7, + 99: 0x875fff, + 100: 0x878700, + 101: 0x87875f, + 102: 0x878787, + 103: 0x8787af, + 104: 0x8787d7, + 105: 0x8787ff, + 106: 0x87af00, + 107: 0x87af5f, + 108: 0x87af87, + 109: 0x87afaf, + 110: 0x87afd7, + 111: 0x87afff, + 112: 0x87d700, + 113: 0x87d75f, + 114: 0x87d787, + 115: 0x87d7af, + 116: 0x87d7d7, + 117: 0x87d7ff, + 118: 0x87ff00, + 119: 0x87ff5f, + 120: 0x87ff87, + 121: 0x87ffaf, + 122: 0x87ffd7, + 123: 0x87ffff, + 124: 0xaf0000, + 125: 0xaf005f, + 126: 0xaf0087, + 127: 0xaf00af, + 128: 0xaf00d7, + 129: 0xaf00ff, + 130: 0xaf5f00, + 131: 0xaf5f5f, + 132: 0xaf5f87, + 133: 0xaf5faf, + 134: 0xaf5fd7, + 135: 0xaf5fff, + 136: 0xaf8700, + 137: 0xaf875f, + 138: 0xaf8787, + 139: 0xaf87af, + 140: 0xaf87d7, + 141: 0xaf87ff, + 142: 0xafaf00, + 143: 0xafaf5f, + 144: 0xafaf87, + 145: 0xafafaf, + 146: 0xafafd7, + 147: 0xafafff, + 148: 0xafd700, + 149: 0xafd75f, + 150: 0xafd787, + 151: 0xafd7af, + 152: 0xafd7d7, + 153: 0xafd7ff, + 154: 0xafff00, + 155: 0xafff5f, + 156: 0xafff87, + 157: 0xafffaf, + 158: 0xafffd7, + 159: 0xafffff, + 160: 0xd70000, + 161: 0xd7005f, + 162: 0xd70087, + 163: 0xd700af, + 164: 0xd700d7, + 165: 0xd700ff, + 166: 0xd75f00, + 167: 0xd75f5f, + 168: 0xd75f87, + 169: 0xd75faf, + 170: 0xd75fd7, + 171: 0xd75fff, + 172: 0xd78700, + 173: 0xd7875f, + 174: 0xd78787, + 175: 0xd787af, + 176: 0xd787d7, + 177: 0xd787ff, + 178: 0xd7af00, + 179: 0xd7af5f, + 180: 0xd7af87, + 181: 0xd7afaf, + 182: 0xd7afd7, + 183: 0xd7afff, + 184: 0xd7d700, + 185: 0xd7d75f, + 186: 0xd7d787, + 187: 0xd7d7af, + 188: 0xd7d7d7, + 189: 0xd7d7ff, + 190: 0xd7ff00, + 191: 0xd7ff5f, + 192: 0xd7ff87, + 193: 0xd7ffaf, + 194: 0xd7ffd7, + 195: 0xd7ffff, + 196: 0xff0000, + 197: 0xff005f, + 198: 0xff0087, + 199: 0xff00af, + 200: 0xff00d7, + 201: 0xff00ff, + 202: 0xff5f00, + 203: 0xff5f5f, + 204: 0xff5f87, + 205: 0xff5faf, + 206: 0xff5fd7, + 207: 0xff5fff, + 208: 0xff8700, + 209: 0xff875f, + 210: 0xff8787, + 211: 0xff87af, + 212: 0xff87d7, + 213: 0xff87ff, + 214: 0xffaf00, + 215: 0xffaf5f, + 216: 0xffaf87, + 217: 0xffafaf, + 218: 0xffafd7, + 219: 0xffafff, + 220: 0xffd700, + 221: 0xffd75f, + 222: 0xffd787, + 223: 0xffd7af, + 224: 0xffd7d7, + 225: 0xffd7ff, + 226: 0xffff00, + 227: 0xffff5f, + 228: 0xffff87, + 229: 0xffffaf, + 230: 0xffffd7, + 231: 0xffffff, + 232: 0x080808, + 233: 0x121212, + 234: 0x1c1c1c, + 235: 0x262626, + 236: 0x303030, + 237: 0x3a3a3a, + 238: 0x444444, + 239: 0x4e4e4e, + 240: 0x585858, + 241: 0x626262, + 242: 0x6c6c6c, + 243: 0x767676, + 244: 0x808080, + 245: 0x8a8a8a, + 246: 0x949494, + 247: 0x9e9e9e, + 248: 0xa8a8a8, + 249: 0xb2b2b2, + 250: 0xbcbcbc, + 251: 0xc6c6c6, + 252: 0xd0d0d0, + 253: 0xdadada, + 254: 0xe4e4e4, + 255: 0xeeeeee, +} + +func (w *writer) Write(data []byte) (n int, err error) { + var csbi consoleScreenBufferInfo + procGetConsoleScreenBufferInfo.Call(uintptr(w.handle), uintptr(unsafe.Pointer(&csbi))) + + er := bytes.NewBuffer(data) +loop: + for { + r1, _, err := procGetConsoleScreenBufferInfo.Call(uintptr(w.handle), uintptr(unsafe.Pointer(&csbi))) + if r1 == 0 { + break loop + } + + c1, _, err := er.ReadRune() + if err != nil { + break loop + } + if c1 != 0x1b { + fmt.Fprint(w.out, string(c1)) + continue + } + c2, _, err := er.ReadRune() + if err != nil { + w.lastbuf.WriteRune(c1) + break loop + } + if c2 != 0x5b { + w.lastbuf.WriteRune(c1) + w.lastbuf.WriteRune(c2) + continue + } + + var buf bytes.Buffer + var m rune + for { + c, _, err := er.ReadRune() + if err != nil { + w.lastbuf.WriteRune(c1) + w.lastbuf.WriteRune(c2) + w.lastbuf.Write(buf.Bytes()) + break loop + } + if ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || c == '@' { + m = c + break + } + buf.Write([]byte(string(c))) + } + + var csbi consoleScreenBufferInfo + switch m { + case 'A': + n, err = strconv.Atoi(buf.String()) + if err != nil { + continue + } + procGetConsoleScreenBufferInfo.Call(uintptr(w.handle), uintptr(unsafe.Pointer(&csbi))) + csbi.cursorPosition.y -= short(n) + procSetConsoleCursorPosition.Call(uintptr(w.handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition))) + case 'B': + n, err = strconv.Atoi(buf.String()) + if err != nil { + continue + } + procGetConsoleScreenBufferInfo.Call(uintptr(w.handle), uintptr(unsafe.Pointer(&csbi))) + csbi.cursorPosition.y += short(n) + procSetConsoleCursorPosition.Call(uintptr(w.handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition))) + case 'C': + n, err = strconv.Atoi(buf.String()) + if err != nil { + continue + } + procGetConsoleScreenBufferInfo.Call(uintptr(w.handle), uintptr(unsafe.Pointer(&csbi))) + csbi.cursorPosition.x -= short(n) + procSetConsoleCursorPosition.Call(uintptr(w.handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition))) + case 'D': + n, err = strconv.Atoi(buf.String()) + if err != nil { + continue + } + if n, err = strconv.Atoi(buf.String()); err == nil { + var csbi consoleScreenBufferInfo + procGetConsoleScreenBufferInfo.Call(uintptr(w.handle), uintptr(unsafe.Pointer(&csbi))) + csbi.cursorPosition.x += short(n) + procSetConsoleCursorPosition.Call(uintptr(w.handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition))) + } + case 'E': + n, err = strconv.Atoi(buf.String()) + if err != nil { + continue + } + procGetConsoleScreenBufferInfo.Call(uintptr(w.handle), uintptr(unsafe.Pointer(&csbi))) + csbi.cursorPosition.x = 0 + csbi.cursorPosition.y += short(n) + procSetConsoleCursorPosition.Call(uintptr(w.handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition))) + case 'F': + n, err = strconv.Atoi(buf.String()) + if err != nil { + continue + } + procGetConsoleScreenBufferInfo.Call(uintptr(w.handle), uintptr(unsafe.Pointer(&csbi))) + csbi.cursorPosition.x = 0 + csbi.cursorPosition.y -= short(n) + procSetConsoleCursorPosition.Call(uintptr(w.handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition))) + case 'G': + n, err = strconv.Atoi(buf.String()) + if err != nil { + continue + } + procGetConsoleScreenBufferInfo.Call(uintptr(w.handle), uintptr(unsafe.Pointer(&csbi))) + csbi.cursorPosition.x = short(n) + procSetConsoleCursorPosition.Call(uintptr(w.handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition))) + case 'H': + token := strings.Split(buf.String(), ";") + if len(token) != 2 { + continue + } + n1, err := strconv.Atoi(token[0]) + if err != nil { + continue + } + n2, err := strconv.Atoi(token[1]) + if err != nil { + continue + } + csbi.cursorPosition.x = short(n2) + csbi.cursorPosition.x = short(n1) + procSetConsoleCursorPosition.Call(uintptr(w.handle), *(*uintptr)(unsafe.Pointer(&csbi.cursorPosition))) + case 'J': + n, err := strconv.Atoi(buf.String()) + if err != nil { + continue + } + var cursor coord + switch n { + case 0: + cursor = coord{x: csbi.cursorPosition.x, y: csbi.cursorPosition.y} + case 1: + cursor = coord{x: csbi.window.left, y: csbi.window.top} + case 2: + cursor = coord{x: csbi.window.left, y: csbi.window.top} + } + var count, written dword + count = dword(csbi.size.x - csbi.cursorPosition.x + (csbi.size.y-csbi.cursorPosition.y)*csbi.size.x) + procFillConsoleOutputCharacter.Call(uintptr(w.handle), uintptr(' '), uintptr(count), *(*uintptr)(unsafe.Pointer(&cursor)), uintptr(unsafe.Pointer(&written))) + procFillConsoleOutputAttribute.Call(uintptr(w.handle), uintptr(csbi.attributes), uintptr(count), *(*uintptr)(unsafe.Pointer(&cursor)), uintptr(unsafe.Pointer(&written))) + case 'K': + n, err := strconv.Atoi(buf.String()) + if err != nil { + continue + } + var cursor coord + switch n { + case 0: + cursor = coord{x: csbi.cursorPosition.x, y: csbi.cursorPosition.y} + case 1: + cursor = coord{x: csbi.window.left, y: csbi.window.top + csbi.cursorPosition.y} + case 2: + cursor = coord{x: csbi.window.left, y: csbi.window.top + csbi.cursorPosition.y} + } + var count, written dword + count = dword(csbi.size.x - csbi.cursorPosition.x) + procFillConsoleOutputCharacter.Call(uintptr(w.handle), uintptr(' '), uintptr(count), *(*uintptr)(unsafe.Pointer(&cursor)), uintptr(unsafe.Pointer(&written))) + procFillConsoleOutputAttribute.Call(uintptr(w.handle), uintptr(csbi.attributes), uintptr(count), *(*uintptr)(unsafe.Pointer(&cursor)), uintptr(unsafe.Pointer(&written))) + case 'm': + attr := csbi.attributes + cs := buf.String() + if cs == "" { + procSetConsoleTextAttribute.Call(uintptr(w.handle), uintptr(w.oldattr)) + continue + } + token := strings.Split(cs, ";") + for i := 0; i < len(token); i += 1 { + ns := token[i] + if n, err = strconv.Atoi(ns); err == nil { + switch { + case n == 0 || n == 100: + attr = w.oldattr + case 1 <= n && n <= 5: + attr |= foregroundIntensity + case n == 7: + attr = ((attr & foregroundMask) << 4) | ((attr & backgroundMask) >> 4) + case 22 == n || n == 25 || n == 25: + attr |= foregroundIntensity + case n == 27: + attr = ((attr & foregroundMask) << 4) | ((attr & backgroundMask) >> 4) + case 30 <= n && n <= 37: + attr = (attr & backgroundMask) + if (n-30)&1 != 0 { + attr |= foregroundRed + } + if (n-30)&2 != 0 { + attr |= foregroundGreen + } + if (n-30)&4 != 0 { + attr |= foregroundBlue + } + case n == 38: // set foreground color. + if i < len(token)-2 && (token[i+1] == "5" || token[i+1] == "05") { + if n256, err := strconv.Atoi(token[i+2]); err == nil { + if n256foreAttr == nil { + n256setup() + } + attr &= backgroundMask + attr |= n256foreAttr[n256] + i += 2 + } + } else { + attr = attr & (w.oldattr & backgroundMask) + } + case n == 39: // reset foreground color. + attr &= backgroundMask + attr |= w.oldattr & foregroundMask + case 40 <= n && n <= 47: + attr = (attr & foregroundMask) + if (n-40)&1 != 0 { + attr |= backgroundRed + } + if (n-40)&2 != 0 { + attr |= backgroundGreen + } + if (n-40)&4 != 0 { + attr |= backgroundBlue + } + case n == 48: // set background color. + if i < len(token)-2 && token[i+1] == "5" { + if n256, err := strconv.Atoi(token[i+2]); err == nil { + if n256backAttr == nil { + n256setup() + } + attr &= foregroundMask + attr |= n256backAttr[n256] + i += 2 + } + } else { + attr = attr & (w.oldattr & foregroundMask) + } + case n == 49: // reset foreground color. + attr &= foregroundMask + attr |= w.oldattr & backgroundMask + case 90 <= n && n <= 97: + attr = (attr & backgroundMask) + attr |= foregroundIntensity + if (n-90)&1 != 0 { + attr |= foregroundRed + } + if (n-90)&2 != 0 { + attr |= foregroundGreen + } + if (n-90)&4 != 0 { + attr |= foregroundBlue + } + case 100 <= n && n <= 107: + attr = (attr & foregroundMask) + attr |= backgroundIntensity + if (n-100)&1 != 0 { + attr |= backgroundRed + } + if (n-100)&2 != 0 { + attr |= backgroundGreen + } + if (n-100)&4 != 0 { + attr |= backgroundBlue + } + } + procSetConsoleTextAttribute.Call(uintptr(w.handle), uintptr(attr)) + } + } + } + } + return len(data) - w.lastbuf.Len(), nil +} + +type consoleColor struct { + rgb int + red bool + green bool + blue bool + intensity bool +} + +func (c consoleColor) foregroundAttr() (attr word) { + if c.red { + attr |= foregroundRed + } + if c.green { + attr |= foregroundGreen + } + if c.blue { + attr |= foregroundBlue + } + if c.intensity { + attr |= foregroundIntensity + } + return +} + +func (c consoleColor) backgroundAttr() (attr word) { + if c.red { + attr |= backgroundRed + } + if c.green { + attr |= backgroundGreen + } + if c.blue { + attr |= backgroundBlue + } + if c.intensity { + attr |= backgroundIntensity + } + return +} + +var color16 = []consoleColor{ + consoleColor{0x000000, false, false, false, false}, + consoleColor{0x000080, false, false, true, false}, + consoleColor{0x008000, false, true, false, false}, + consoleColor{0x008080, false, true, true, false}, + consoleColor{0x800000, true, false, false, false}, + consoleColor{0x800080, true, false, true, false}, + consoleColor{0x808000, true, true, false, false}, + consoleColor{0xc0c0c0, true, true, true, false}, + consoleColor{0x808080, false, false, false, true}, + consoleColor{0x0000ff, false, false, true, true}, + consoleColor{0x00ff00, false, true, false, true}, + consoleColor{0x00ffff, false, true, true, true}, + consoleColor{0xff0000, true, false, false, true}, + consoleColor{0xff00ff, true, false, true, true}, + consoleColor{0xffff00, true, true, false, true}, + consoleColor{0xffffff, true, true, true, true}, +} + +type hsv struct { + h, s, v float32 +} + +func (a hsv) dist(b hsv) float32 { + dh := a.h - b.h + switch { + case dh > 0.5: + dh = 1 - dh + case dh < -0.5: + dh = -1 - dh + } + ds := a.s - b.s + dv := a.v - b.v + return float32(math.Sqrt(float64(dh*dh + ds*ds + dv*dv))) +} + +func toHSV(rgb int) hsv { + r, g, b := float32((rgb&0xFF0000)>>16)/256.0, + float32((rgb&0x00FF00)>>8)/256.0, + float32(rgb&0x0000FF)/256.0 + min, max := minmax3f(r, g, b) + h := max - min + if h > 0 { + if max == r { + h = (g - b) / h + if h < 0 { + h += 6 + } + } else if max == g { + h = 2 + (b-r)/h + } else { + h = 4 + (r-g)/h + } + } + h /= 6.0 + s := max - min + if max != 0 { + s /= max + } + v := max + return hsv{h: h, s: s, v: v} +} + +type hsvTable []hsv + +func toHSVTable(rgbTable []consoleColor) hsvTable { + t := make(hsvTable, len(rgbTable)) + for i, c := range rgbTable { + t[i] = toHSV(c.rgb) + } + return t +} + +func (t hsvTable) find(rgb int) consoleColor { + hsv := toHSV(rgb) + n := 7 + l := float32(5.0) + for i, p := range t { + d := hsv.dist(p) + if d < l { + l, n = d, i + } + } + return color16[n] +} + +func minmax3f(a, b, c float32) (min, max float32) { + if a < b { + if b < c { + return a, c + } else if a < c { + return a, b + } else { + return c, b + } + } else { + if a < c { + return b, c + } else if b < c { + return b, a + } else { + return c, a + } + } +} + +var n256foreAttr []word +var n256backAttr []word + +func n256setup() { + n256foreAttr = make([]word, 256) + n256backAttr = make([]word, 256) + t := toHSVTable(color16) + for i, rgb := range color256 { + c := t.find(rgb) + n256foreAttr[i] = c.foregroundAttr() + n256backAttr[i] = c.backgroundAttr() + } +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/formatter/formatter.go b/backend/vendor/github.com/onsi/ginkgo/v2/formatter/formatter.go new file mode 100644 index 0000000..f61356d --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/formatter/formatter.go @@ -0,0 +1,234 @@ +package formatter + +import ( + "fmt" + "os" + "regexp" + "strconv" + "strings" +) + +// ColorableStdOut and ColorableStdErr enable color output support on Windows +var ColorableStdOut = newColorable(os.Stdout) +var ColorableStdErr = newColorable(os.Stderr) + +const COLS = 80 + +type ColorMode uint8 + +const ( + ColorModeNone ColorMode = iota + ColorModeTerminal + ColorModePassthrough +) + +var SingletonFormatter = New(ColorModeTerminal) + +func F(format string, args ...any) string { + return SingletonFormatter.F(format, args...) +} + +func Fi(indentation uint, format string, args ...any) string { + return SingletonFormatter.Fi(indentation, format, args...) +} + +func Fiw(indentation uint, maxWidth uint, format string, args ...any) string { + return SingletonFormatter.Fiw(indentation, maxWidth, format, args...) +} + +type Formatter struct { + ColorMode ColorMode + colors map[string]string + styleRe *regexp.Regexp + preserveColorStylingTags bool +} + +func NewWithNoColorBool(noColor bool) Formatter { + if noColor { + return New(ColorModeNone) + } + return New(ColorModeTerminal) +} + +func New(colorMode ColorMode) Formatter { + colorAliases := map[string]int{ + "black": 0, + "red": 1, + "green": 2, + "yellow": 3, + "blue": 4, + "magenta": 5, + "cyan": 6, + "white": 7, + } + for colorAlias, n := range colorAliases { + colorAliases[fmt.Sprintf("bright-%s", colorAlias)] = n + 8 + } + + getColor := func(color, defaultEscapeCode string) string { + color = strings.ToUpper(strings.ReplaceAll(color, "-", "_")) + envVar := fmt.Sprintf("GINKGO_CLI_COLOR_%s", color) + envVarColor := os.Getenv(envVar) + if envVarColor == "" { + return defaultEscapeCode + } + if colorCode, ok := colorAliases[envVarColor]; ok { + return fmt.Sprintf("\x1b[38;5;%dm", colorCode) + } + colorCode, err := strconv.Atoi(envVarColor) + if err != nil || colorCode < 0 || colorCode > 255 { + return defaultEscapeCode + } + return fmt.Sprintf("\x1b[38;5;%dm", colorCode) + } + + if _, noColor := os.LookupEnv("GINKGO_NO_COLOR"); noColor { + colorMode = ColorModeNone + } + + f := Formatter{ + ColorMode: colorMode, + colors: map[string]string{ + "/": "\x1b[0m", + "bold": "\x1b[1m", + "underline": "\x1b[4m", + + "red": getColor("red", "\x1b[38;5;9m"), + "orange": getColor("orange", "\x1b[38;5;214m"), + "coral": getColor("coral", "\x1b[38;5;204m"), + "magenta": getColor("magenta", "\x1b[38;5;13m"), + "green": getColor("green", "\x1b[38;5;10m"), + "dark-green": getColor("dark-green", "\x1b[38;5;28m"), + "yellow": getColor("yellow", "\x1b[38;5;11m"), + "light-yellow": getColor("light-yellow", "\x1b[38;5;228m"), + "cyan": getColor("cyan", "\x1b[38;5;14m"), + "gray": getColor("gray", "\x1b[38;5;243m"), + "light-gray": getColor("light-gray", "\x1b[38;5;246m"), + "blue": getColor("blue", "\x1b[38;5;12m"), + }, + } + colors := []string{} + for color := range f.colors { + colors = append(colors, color) + } + f.styleRe = regexp.MustCompile("{{(" + strings.Join(colors, "|") + ")}}") + return f +} + +func (f Formatter) F(format string, args ...any) string { + return f.Fi(0, format, args...) +} + +func (f Formatter) Fi(indentation uint, format string, args ...any) string { + return f.Fiw(indentation, 0, format, args...) +} + +func (f Formatter) Fiw(indentation uint, maxWidth uint, format string, args ...any) string { + out := f.style(format) + if len(args) > 0 { + out = fmt.Sprintf(out, args...) + } + + if indentation == 0 && maxWidth == 0 { + return out + } + + lines := strings.Split(out, "\n") + + if maxWidth != 0 { + outLines := []string{} + + maxWidth = maxWidth - indentation*2 + for _, line := range lines { + if f.length(line) <= maxWidth { + outLines = append(outLines, line) + continue + } + words := strings.Split(line, " ") + outWords := []string{words[0]} + length := uint(f.length(words[0])) + for _, word := range words[1:] { + wordLength := f.length(word) + if length+wordLength+1 <= maxWidth { + length += wordLength + 1 + outWords = append(outWords, word) + continue + } + outLines = append(outLines, strings.Join(outWords, " ")) + outWords = []string{word} + length = wordLength + } + if len(outWords) > 0 { + outLines = append(outLines, strings.Join(outWords, " ")) + } + } + + lines = outLines + } + + if indentation == 0 { + return strings.Join(lines, "\n") + } + + padding := strings.Repeat(" ", int(indentation)) + for i := range lines { + if lines[i] != "" { + lines[i] = padding + lines[i] + } + } + + return strings.Join(lines, "\n") +} + +func (f Formatter) length(styled string) uint { + n := uint(0) + inStyle := false + for _, b := range styled { + if inStyle { + if b == 'm' { + inStyle = false + } + continue + } + if b == '\x1b' { + inStyle = true + continue + } + n += 1 + } + return n +} + +func (f Formatter) CycleJoin(elements []string, joiner string, cycle []string) string { + if len(elements) == 0 { + return "" + } + n := len(cycle) + out := "" + for i, text := range elements { + out += cycle[i%n] + text + if i < len(elements)-1 { + out += joiner + } + } + out += "{{/}}" + return f.style(out) +} + +func (f Formatter) style(s string) string { + switch f.ColorMode { + case ColorModeNone: + return f.styleRe.ReplaceAllString(s, "") + case ColorModePassthrough: + return s + case ColorModeTerminal: + return f.styleRe.ReplaceAllStringFunc(s, func(match string) string { + if out, ok := f.colors[strings.Trim(match, "{}")]; ok { + return out + } + return match + }) + } + + return "" +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs.go new file mode 100644 index 0000000..ee6ac7b --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs.go @@ -0,0 +1,8 @@ +//go:build !go1.25 +// +build !go1.25 + +package main + +import ( + _ "github.com/onsi/ginkgo/v2/ginkgo/automaxprocs" +) diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/README.md b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/README.md new file mode 100644 index 0000000..e249ebe --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/README.md @@ -0,0 +1,3 @@ +This entire directory is a lightly modified clone of https://github.com/uber-go/automaxprocs + +It will be removed when Go 1.26 ships and we no longer need to support Go 1.24 (which does not correctly autodetect maxprocs in containers). diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/automaxprocs.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/automaxprocs.go new file mode 100644 index 0000000..8a762b5 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/automaxprocs.go @@ -0,0 +1,71 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +// Package maxprocs lets Go programs easily configure runtime.GOMAXPROCS to +// match the configured Linux CPU quota. Unlike the top-level automaxprocs +// package, it lets the caller configure logging and handle errors. +package automaxprocs + +import ( + "os" + "runtime" +) + +func init() { + Set() +} + +const _maxProcsKey = "GOMAXPROCS" + +type config struct { + procs func(int, func(v float64) int) (int, CPUQuotaStatus, error) + minGOMAXPROCS int + roundQuotaFunc func(v float64) int +} + +// Set GOMAXPROCS to match the Linux container CPU quota (if any), returning +// any error encountered and an undo function. +// +// Set is a no-op on non-Linux systems and in Linux environments without a +// configured CPU quota. +func Set() error { + cfg := &config{ + procs: CPUQuotaToGOMAXPROCS, + roundQuotaFunc: DefaultRoundFunc, + minGOMAXPROCS: 1, + } + + // Honor the GOMAXPROCS environment variable if present. Otherwise, amend + // `runtime.GOMAXPROCS()` with the current process' CPU quota if the OS is + // Linux, and guarantee a minimum value of 1. The minimum guaranteed value + // can be overridden using `maxprocs.Min()`. + if _, exists := os.LookupEnv(_maxProcsKey); exists { + return nil + } + maxProcs, status, err := cfg.procs(cfg.minGOMAXPROCS, cfg.roundQuotaFunc) + if err != nil { + return err + } + if status == CPUQuotaUndefined { + return nil + } + runtime.GOMAXPROCS(maxProcs) + return nil +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/cgroup.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/cgroup.go new file mode 100644 index 0000000..a467693 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/cgroup.go @@ -0,0 +1,79 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +//go:build linux +// +build linux + +package automaxprocs + +import ( + "bufio" + "io" + "os" + "path/filepath" + "strconv" +) + +// CGroup represents the data structure for a Linux control group. +type CGroup struct { + path string +} + +// NewCGroup returns a new *CGroup from a given path. +func NewCGroup(path string) *CGroup { + return &CGroup{path: path} +} + +// Path returns the path of the CGroup*. +func (cg *CGroup) Path() string { + return cg.path +} + +// ParamPath returns the path of the given cgroup param under itself. +func (cg *CGroup) ParamPath(param string) string { + return filepath.Join(cg.path, param) +} + +// readFirstLine reads the first line from a cgroup param file. +func (cg *CGroup) readFirstLine(param string) (string, error) { + paramFile, err := os.Open(cg.ParamPath(param)) + if err != nil { + return "", err + } + defer paramFile.Close() + + scanner := bufio.NewScanner(paramFile) + if scanner.Scan() { + return scanner.Text(), nil + } + if err := scanner.Err(); err != nil { + return "", err + } + return "", io.ErrUnexpectedEOF +} + +// readInt parses the first line from a cgroup param file as int. +func (cg *CGroup) readInt(param string) (int, error) { + text, err := cg.readFirstLine(param) + if err != nil { + return 0, err + } + return strconv.Atoi(text) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/cgroups.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/cgroups.go new file mode 100644 index 0000000..ed38489 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/cgroups.go @@ -0,0 +1,118 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +//go:build linux +// +build linux + +package automaxprocs + +const ( + // _cgroupFSType is the Linux CGroup file system type used in + // `/proc/$PID/mountinfo`. + _cgroupFSType = "cgroup" + // _cgroupSubsysCPU is the CPU CGroup subsystem. + _cgroupSubsysCPU = "cpu" + // _cgroupSubsysCPUAcct is the CPU accounting CGroup subsystem. + _cgroupSubsysCPUAcct = "cpuacct" + // _cgroupSubsysCPUSet is the CPUSet CGroup subsystem. + _cgroupSubsysCPUSet = "cpuset" + // _cgroupSubsysMemory is the Memory CGroup subsystem. + _cgroupSubsysMemory = "memory" + + // _cgroupCPUCFSQuotaUsParam is the file name for the CGroup CFS quota + // parameter. + _cgroupCPUCFSQuotaUsParam = "cpu.cfs_quota_us" + // _cgroupCPUCFSPeriodUsParam is the file name for the CGroup CFS period + // parameter. + _cgroupCPUCFSPeriodUsParam = "cpu.cfs_period_us" +) + +const ( + _procPathCGroup = "/proc/self/cgroup" + _procPathMountInfo = "/proc/self/mountinfo" +) + +// CGroups is a map that associates each CGroup with its subsystem name. +type CGroups map[string]*CGroup + +// NewCGroups returns a new *CGroups from given `mountinfo` and `cgroup` files +// under for some process under `/proc` file system (see also proc(5) for more +// information). +func NewCGroups(procPathMountInfo, procPathCGroup string) (CGroups, error) { + cgroupSubsystems, err := parseCGroupSubsystems(procPathCGroup) + if err != nil { + return nil, err + } + + cgroups := make(CGroups) + newMountPoint := func(mp *MountPoint) error { + if mp.FSType != _cgroupFSType { + return nil + } + + for _, opt := range mp.SuperOptions { + subsys, exists := cgroupSubsystems[opt] + if !exists { + continue + } + + cgroupPath, err := mp.Translate(subsys.Name) + if err != nil { + return err + } + cgroups[opt] = NewCGroup(cgroupPath) + } + + return nil + } + + if err := parseMountInfo(procPathMountInfo, newMountPoint); err != nil { + return nil, err + } + return cgroups, nil +} + +// NewCGroupsForCurrentProcess returns a new *CGroups instance for the current +// process. +func NewCGroupsForCurrentProcess() (CGroups, error) { + return NewCGroups(_procPathMountInfo, _procPathCGroup) +} + +// CPUQuota returns the CPU quota applied with the CPU cgroup controller. +// It is a result of `cpu.cfs_quota_us / cpu.cfs_period_us`. If the value of +// `cpu.cfs_quota_us` was not set (-1), the method returns `(-1, nil)`. +func (cg CGroups) CPUQuota() (float64, bool, error) { + cpuCGroup, exists := cg[_cgroupSubsysCPU] + if !exists { + return -1, false, nil + } + + cfsQuotaUs, err := cpuCGroup.readInt(_cgroupCPUCFSQuotaUsParam) + if defined := cfsQuotaUs > 0; err != nil || !defined { + return -1, defined, err + } + + cfsPeriodUs, err := cpuCGroup.readInt(_cgroupCPUCFSPeriodUsParam) + if defined := cfsPeriodUs > 0; err != nil || !defined { + return -1, defined, err + } + + return float64(cfsQuotaUs) / float64(cfsPeriodUs), true, nil +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/cgroups2.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/cgroups2.go new file mode 100644 index 0000000..69a0be6 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/cgroups2.go @@ -0,0 +1,176 @@ +// Copyright (c) 2022 Uber Technologies, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +//go:build linux +// +build linux + +package automaxprocs + +import ( + "bufio" + "errors" + "fmt" + "io" + "os" + "path" + "strconv" + "strings" +) + +const ( + // _cgroupv2CPUMax is the file name for the CGroup-V2 CPU max and period + // parameter. + _cgroupv2CPUMax = "cpu.max" + // _cgroupFSType is the Linux CGroup-V2 file system type used in + // `/proc/$PID/mountinfo`. + _cgroupv2FSType = "cgroup2" + + _cgroupv2MountPoint = "/sys/fs/cgroup" + + _cgroupV2CPUMaxDefaultPeriod = 100000 + _cgroupV2CPUMaxQuotaMax = "max" +) + +const ( + _cgroupv2CPUMaxQuotaIndex = iota + _cgroupv2CPUMaxPeriodIndex +) + +// ErrNotV2 indicates that the system is not using cgroups2. +var ErrNotV2 = errors.New("not using cgroups2") + +// CGroups2 provides access to cgroups data for systems using cgroups2. +type CGroups2 struct { + mountPoint string + groupPath string + cpuMaxFile string +} + +// NewCGroups2ForCurrentProcess builds a CGroups2 for the current process. +// +// This returns ErrNotV2 if the system is not using cgroups2. +func NewCGroups2ForCurrentProcess() (*CGroups2, error) { + return newCGroups2From(_procPathMountInfo, _procPathCGroup) +} + +func newCGroups2From(mountInfoPath, procPathCGroup string) (*CGroups2, error) { + isV2, err := isCGroupV2(mountInfoPath) + if err != nil { + return nil, err + } + + if !isV2 { + return nil, ErrNotV2 + } + + subsystems, err := parseCGroupSubsystems(procPathCGroup) + if err != nil { + return nil, err + } + + // Find v2 subsystem by looking for the `0` id + var v2subsys *CGroupSubsys + for _, subsys := range subsystems { + if subsys.ID == 0 { + v2subsys = subsys + break + } + } + + if v2subsys == nil { + return nil, ErrNotV2 + } + + return &CGroups2{ + mountPoint: _cgroupv2MountPoint, + groupPath: v2subsys.Name, + cpuMaxFile: _cgroupv2CPUMax, + }, nil +} + +func isCGroupV2(procPathMountInfo string) (bool, error) { + var ( + isV2 bool + newMountPoint = func(mp *MountPoint) error { + isV2 = isV2 || (mp.FSType == _cgroupv2FSType && mp.MountPoint == _cgroupv2MountPoint) + return nil + } + ) + + if err := parseMountInfo(procPathMountInfo, newMountPoint); err != nil { + return false, err + } + + return isV2, nil +} + +// CPUQuota returns the CPU quota applied with the CPU cgroup2 controller. +// It is a result of reading cpu quota and period from cpu.max file. +// It will return `cpu.max / cpu.period`. If cpu.max is set to max, it returns +// (-1, false, nil) +func (cg *CGroups2) CPUQuota() (float64, bool, error) { + cpuMaxParams, err := os.Open(path.Join(cg.mountPoint, cg.groupPath, cg.cpuMaxFile)) + if err != nil { + if os.IsNotExist(err) { + return -1, false, nil + } + return -1, false, err + } + defer cpuMaxParams.Close() + + scanner := bufio.NewScanner(cpuMaxParams) + if scanner.Scan() { + fields := strings.Fields(scanner.Text()) + if len(fields) == 0 || len(fields) > 2 { + return -1, false, fmt.Errorf("invalid format") + } + + if fields[_cgroupv2CPUMaxQuotaIndex] == _cgroupV2CPUMaxQuotaMax { + return -1, false, nil + } + + max, err := strconv.Atoi(fields[_cgroupv2CPUMaxQuotaIndex]) + if err != nil { + return -1, false, err + } + + var period int + if len(fields) == 1 { + period = _cgroupV2CPUMaxDefaultPeriod + } else { + period, err = strconv.Atoi(fields[_cgroupv2CPUMaxPeriodIndex]) + if err != nil { + return -1, false, err + } + + if period == 0 { + return -1, false, errors.New("zero value for period is not allowed") + } + } + + return float64(max) / float64(period), true, nil + } + + if err := scanner.Err(); err != nil { + return -1, false, err + } + + return 0, false, io.ErrUnexpectedEOF +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/cpu_quota_linux.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/cpu_quota_linux.go new file mode 100644 index 0000000..2d83343 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/cpu_quota_linux.go @@ -0,0 +1,73 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +//go:build linux +// +build linux + +package automaxprocs + +import ( + "errors" +) + +// CPUQuotaToGOMAXPROCS converts the CPU quota applied to the calling process +// to a valid GOMAXPROCS value. The quota is converted from float to int using round. +// If round == nil, DefaultRoundFunc is used. +func CPUQuotaToGOMAXPROCS(minValue int, round func(v float64) int) (int, CPUQuotaStatus, error) { + if round == nil { + round = DefaultRoundFunc + } + cgroups, err := _newQueryer() + if err != nil { + return -1, CPUQuotaUndefined, err + } + + quota, defined, err := cgroups.CPUQuota() + if !defined || err != nil { + return -1, CPUQuotaUndefined, err + } + + maxProcs := round(quota) + if minValue > 0 && maxProcs < minValue { + return minValue, CPUQuotaMinUsed, nil + } + return maxProcs, CPUQuotaUsed, nil +} + +type queryer interface { + CPUQuota() (float64, bool, error) +} + +var ( + _newCgroups2 = NewCGroups2ForCurrentProcess + _newCgroups = NewCGroupsForCurrentProcess + _newQueryer = newQueryer +) + +func newQueryer() (queryer, error) { + cgroups, err := _newCgroups2() + if err == nil { + return cgroups, nil + } + if errors.Is(err, ErrNotV2) { + return _newCgroups() + } + return nil, err +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/cpu_quota_unsupported.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/cpu_quota_unsupported.go new file mode 100644 index 0000000..d2d61e8 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/cpu_quota_unsupported.go @@ -0,0 +1,31 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +//go:build !linux +// +build !linux + +package automaxprocs + +// CPUQuotaToGOMAXPROCS converts the CPU quota applied to the calling process +// to a valid GOMAXPROCS value. This is Linux-specific and not supported in the +// current OS. +func CPUQuotaToGOMAXPROCS(_ int, _ func(v float64) int) (int, CPUQuotaStatus, error) { + return -1, CPUQuotaUndefined, nil +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/errors.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/errors.go new file mode 100644 index 0000000..2e235d7 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/errors.go @@ -0,0 +1,52 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +//go:build linux +// +build linux + +package automaxprocs + +import "fmt" + +type cgroupSubsysFormatInvalidError struct { + line string +} + +type mountPointFormatInvalidError struct { + line string +} + +type pathNotExposedFromMountPointError struct { + mountPoint string + root string + path string +} + +func (err cgroupSubsysFormatInvalidError) Error() string { + return fmt.Sprintf("invalid format for CGroupSubsys: %q", err.line) +} + +func (err mountPointFormatInvalidError) Error() string { + return fmt.Sprintf("invalid format for MountPoint: %q", err.line) +} + +func (err pathNotExposedFromMountPointError) Error() string { + return fmt.Sprintf("path %q is not a descendant of mount point root %q and cannot be exposed from %q", err.path, err.root, err.mountPoint) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/mountpoint.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/mountpoint.go new file mode 100644 index 0000000..7c3fa30 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/mountpoint.go @@ -0,0 +1,171 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +//go:build linux +// +build linux + +package automaxprocs + +import ( + "bufio" + "os" + "path/filepath" + "strconv" + "strings" +) + +const ( + _mountInfoSep = " " + _mountInfoOptsSep = "," + _mountInfoOptionalFieldsSep = "-" +) + +const ( + _miFieldIDMountID = iota + _miFieldIDParentID + _miFieldIDDeviceID + _miFieldIDRoot + _miFieldIDMountPoint + _miFieldIDOptions + _miFieldIDOptionalFields + + _miFieldCountFirstHalf +) + +const ( + _miFieldOffsetFSType = iota + _miFieldOffsetMountSource + _miFieldOffsetSuperOptions + + _miFieldCountSecondHalf +) + +const _miFieldCountMin = _miFieldCountFirstHalf + _miFieldCountSecondHalf + +// MountPoint is the data structure for the mount points in +// `/proc/$PID/mountinfo`. See also proc(5) for more information. +type MountPoint struct { + MountID int + ParentID int + DeviceID string + Root string + MountPoint string + Options []string + OptionalFields []string + FSType string + MountSource string + SuperOptions []string +} + +// NewMountPointFromLine parses a line read from `/proc/$PID/mountinfo` and +// returns a new *MountPoint. +func NewMountPointFromLine(line string) (*MountPoint, error) { + fields := strings.Split(line, _mountInfoSep) + + if len(fields) < _miFieldCountMin { + return nil, mountPointFormatInvalidError{line} + } + + mountID, err := strconv.Atoi(fields[_miFieldIDMountID]) + if err != nil { + return nil, err + } + + parentID, err := strconv.Atoi(fields[_miFieldIDParentID]) + if err != nil { + return nil, err + } + + for i, field := range fields[_miFieldIDOptionalFields:] { + if field == _mountInfoOptionalFieldsSep { + // End of optional fields. + fsTypeStart := _miFieldIDOptionalFields + i + 1 + + // Now we know where the optional fields end, split the line again with a + // limit to avoid issues with spaces in super options as present on WSL. + fields = strings.SplitN(line, _mountInfoSep, fsTypeStart+_miFieldCountSecondHalf) + if len(fields) != fsTypeStart+_miFieldCountSecondHalf { + return nil, mountPointFormatInvalidError{line} + } + + miFieldIDFSType := _miFieldOffsetFSType + fsTypeStart + miFieldIDMountSource := _miFieldOffsetMountSource + fsTypeStart + miFieldIDSuperOptions := _miFieldOffsetSuperOptions + fsTypeStart + + return &MountPoint{ + MountID: mountID, + ParentID: parentID, + DeviceID: fields[_miFieldIDDeviceID], + Root: fields[_miFieldIDRoot], + MountPoint: fields[_miFieldIDMountPoint], + Options: strings.Split(fields[_miFieldIDOptions], _mountInfoOptsSep), + OptionalFields: fields[_miFieldIDOptionalFields:(fsTypeStart - 1)], + FSType: fields[miFieldIDFSType], + MountSource: fields[miFieldIDMountSource], + SuperOptions: strings.Split(fields[miFieldIDSuperOptions], _mountInfoOptsSep), + }, nil + } + } + + return nil, mountPointFormatInvalidError{line} +} + +// Translate converts an absolute path inside the *MountPoint's file system to +// the host file system path in the mount namespace the *MountPoint belongs to. +func (mp *MountPoint) Translate(absPath string) (string, error) { + relPath, err := filepath.Rel(mp.Root, absPath) + + if err != nil { + return "", err + } + if relPath == ".." || strings.HasPrefix(relPath, "../") { + return "", pathNotExposedFromMountPointError{ + mountPoint: mp.MountPoint, + root: mp.Root, + path: absPath, + } + } + + return filepath.Join(mp.MountPoint, relPath), nil +} + +// parseMountInfo parses procPathMountInfo (usually at `/proc/$PID/mountinfo`) +// and yields parsed *MountPoint into newMountPoint. +func parseMountInfo(procPathMountInfo string, newMountPoint func(*MountPoint) error) error { + mountInfoFile, err := os.Open(procPathMountInfo) + if err != nil { + return err + } + defer mountInfoFile.Close() + + scanner := bufio.NewScanner(mountInfoFile) + + for scanner.Scan() { + mountPoint, err := NewMountPointFromLine(scanner.Text()) + if err != nil { + return err + } + if err := newMountPoint(mountPoint); err != nil { + return err + } + } + + return scanner.Err() +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/runtime.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/runtime.go new file mode 100644 index 0000000..b8ec7e5 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/runtime.go @@ -0,0 +1,40 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +package automaxprocs + +import "math" + +// CPUQuotaStatus presents the status of how CPU quota is used +type CPUQuotaStatus int + +const ( + // CPUQuotaUndefined is returned when CPU quota is undefined + CPUQuotaUndefined CPUQuotaStatus = iota + // CPUQuotaUsed is returned when a valid CPU quota can be used + CPUQuotaUsed + // CPUQuotaMinUsed is returned when CPU quota is smaller than the min value + CPUQuotaMinUsed +) + +// DefaultRoundFunc is the default function to convert CPU quota from float to int. It rounds the value down (floor). +func DefaultRoundFunc(v float64) int { + return int(math.Floor(v)) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/subsys.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/subsys.go new file mode 100644 index 0000000..881ebd5 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/automaxprocs/subsys.go @@ -0,0 +1,103 @@ +// Copyright (c) 2017 Uber Technologies, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +//go:build linux +// +build linux + +package automaxprocs + +import ( + "bufio" + "os" + "strconv" + "strings" +) + +const ( + _cgroupSep = ":" + _cgroupSubsysSep = "," +) + +const ( + _csFieldIDID = iota + _csFieldIDSubsystems + _csFieldIDName + _csFieldCount +) + +// CGroupSubsys represents the data structure for entities in +// `/proc/$PID/cgroup`. See also proc(5) for more information. +type CGroupSubsys struct { + ID int + Subsystems []string + Name string +} + +// NewCGroupSubsysFromLine returns a new *CGroupSubsys by parsing a string in +// the format of `/proc/$PID/cgroup` +func NewCGroupSubsysFromLine(line string) (*CGroupSubsys, error) { + fields := strings.SplitN(line, _cgroupSep, _csFieldCount) + + if len(fields) != _csFieldCount { + return nil, cgroupSubsysFormatInvalidError{line} + } + + id, err := strconv.Atoi(fields[_csFieldIDID]) + if err != nil { + return nil, err + } + + cgroup := &CGroupSubsys{ + ID: id, + Subsystems: strings.Split(fields[_csFieldIDSubsystems], _cgroupSubsysSep), + Name: fields[_csFieldIDName], + } + + return cgroup, nil +} + +// parseCGroupSubsystems parses procPathCGroup (usually at `/proc/$PID/cgroup`) +// and returns a new map[string]*CGroupSubsys. +func parseCGroupSubsystems(procPathCGroup string) (map[string]*CGroupSubsys, error) { + cgroupFile, err := os.Open(procPathCGroup) + if err != nil { + return nil, err + } + defer cgroupFile.Close() + + scanner := bufio.NewScanner(cgroupFile) + subsystems := make(map[string]*CGroupSubsys) + + for scanner.Scan() { + cgroup, err := NewCGroupSubsysFromLine(scanner.Text()) + if err != nil { + return nil, err + } + for _, subsys := range cgroup.Subsystems { + subsystems[subsys] = cgroup + } + } + + if err := scanner.Err(); err != nil { + return nil, err + } + + return subsystems, nil +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/build/build_command.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/build/build_command.go new file mode 100644 index 0000000..3021dfe --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/build/build_command.go @@ -0,0 +1,79 @@ +package build + +import ( + "fmt" + "os" + "path" + + "github.com/onsi/ginkgo/v2/ginkgo/command" + "github.com/onsi/ginkgo/v2/ginkgo/internal" + "github.com/onsi/ginkgo/v2/types" +) + +func BuildBuildCommand() command.Command { + var cliConfig = types.NewDefaultCLIConfig() + var goFlagsConfig = types.NewDefaultGoFlagsConfig() + + flags, err := types.BuildBuildCommandFlagSet(&cliConfig, &goFlagsConfig) + if err != nil { + panic(err) + } + + return command.Command{ + Name: "build", + Flags: flags, + Usage: "ginkgo build ", + ShortDoc: "Build the passed in (or the package in the current directory if left blank).", + DocLink: "precompiling-suites", + Command: func(args []string, _ []string) { + var errors []error + cliConfig, goFlagsConfig, errors = types.VetAndInitializeCLIAndGoConfig(cliConfig, goFlagsConfig) + command.AbortIfErrors("Ginkgo detected configuration issues:", errors) + buildSpecs(args, cliConfig, goFlagsConfig) + }, + } +} + +func buildSpecs(args []string, cliConfig types.CLIConfig, goFlagsConfig types.GoFlagsConfig) { + suites := internal.FindSuites(args, cliConfig, false).WithoutState(internal.TestSuiteStateSkippedByFilter) + if len(suites) == 0 { + command.AbortWith("Found no test suites") + } + + internal.VerifyCLIAndFrameworkVersion(suites) + + opc := internal.NewOrderedParallelCompiler(cliConfig.ComputedNumCompilers()) + opc.StartCompiling(suites, goFlagsConfig, true) + + for { + suiteIdx, suite := opc.Next() + if suiteIdx >= len(suites) { + break + } + suites[suiteIdx] = suite + if suite.State.Is(internal.TestSuiteStateFailedToCompile) { + fmt.Println(suite.CompilationError.Error()) + } else { + var testBinPath string + if len(goFlagsConfig.O) != 0 { + stat, err := os.Stat(goFlagsConfig.O) + if err != nil { + panic(err) + } + if stat.IsDir() { + testBinPath = goFlagsConfig.O + "/" + suite.PackageName + ".test" + } else { + testBinPath = goFlagsConfig.O + } + } + if len(testBinPath) == 0 { + testBinPath = path.Join(suite.Path, suite.PackageName+".test") + } + fmt.Printf("Compiled %s\n", testBinPath) + } + } + + if suites.CountWithState(internal.TestSuiteStateFailedToCompile) > 0 { + command.AbortWith("Failed to compile all tests") + } +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/command/abort.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/command/abort.go new file mode 100644 index 0000000..f0e7331 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/command/abort.go @@ -0,0 +1,61 @@ +package command + +import "fmt" + +type AbortDetails struct { + ExitCode int + Error error + EmitUsage bool +} + +func Abort(details AbortDetails) { + panic(details) +} + +func AbortGracefullyWith(format string, args ...any) { + Abort(AbortDetails{ + ExitCode: 0, + Error: fmt.Errorf(format, args...), + EmitUsage: false, + }) +} + +func AbortWith(format string, args ...any) { + Abort(AbortDetails{ + ExitCode: 1, + Error: fmt.Errorf(format, args...), + EmitUsage: false, + }) +} + +func AbortWithUsage(format string, args ...any) { + Abort(AbortDetails{ + ExitCode: 1, + Error: fmt.Errorf(format, args...), + EmitUsage: true, + }) +} + +func AbortIfError(preamble string, err error) { + if err != nil { + Abort(AbortDetails{ + ExitCode: 1, + Error: fmt.Errorf("%s\n%s", preamble, err.Error()), + EmitUsage: false, + }) + } +} + +func AbortIfErrors(preamble string, errors []error) { + if len(errors) > 0 { + out := "" + for _, err := range errors { + out += err.Error() + } + Abort(AbortDetails{ + ExitCode: 1, + Error: fmt.Errorf("%s\n%s", preamble, out), + EmitUsage: false, + }) + } +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/command/command.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/command/command.go new file mode 100644 index 0000000..79b83a3 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/command/command.go @@ -0,0 +1,54 @@ +package command + +import ( + "fmt" + "io" + "strings" + + "github.com/onsi/ginkgo/v2/formatter" + "github.com/onsi/ginkgo/v2/types" +) + +type Command struct { + Name string + Flags types.GinkgoFlagSet + Usage string + ShortDoc string + Documentation string + DocLink string + Command func(args []string, additionalArgs []string) +} + +func (c Command) Run(args []string, additionalArgs []string) { + args, err := c.Flags.Parse(args) + if err != nil { + AbortWithUsage(err.Error()) + } + for _, arg := range args { + if len(arg) > 1 && strings.HasPrefix(arg, "-") { + AbortWith(types.GinkgoErrors.FlagAfterPositionalParameter().Error()) + } + } + c.Command(args, additionalArgs) +} + +func (c Command) EmitUsage(writer io.Writer) { + fmt.Fprintln(writer, formatter.F("{{bold}}"+c.Usage+"{{/}}")) + fmt.Fprintln(writer, formatter.F("{{gray}}%s{{/}}", strings.Repeat("-", len(c.Usage)))) + if c.ShortDoc != "" { + fmt.Fprintln(writer, formatter.Fiw(0, formatter.COLS, c.ShortDoc)) + fmt.Fprintln(writer, "") + } + if c.Documentation != "" { + fmt.Fprintln(writer, formatter.Fiw(0, formatter.COLS, c.Documentation)) + fmt.Fprintln(writer, "") + } + if c.DocLink != "" { + fmt.Fprintln(writer, formatter.Fi(0, "{{bold}}Learn more at:{{/}} {{cyan}}{{underline}}http://onsi.github.io/ginkgo/#%s{{/}}", c.DocLink)) + fmt.Fprintln(writer, "") + } + flagUsage := c.Flags.Usage() + if flagUsage != "" { + fmt.Fprintf(writer, formatter.F(flagUsage)) + } +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/command/program.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/command/program.go new file mode 100644 index 0000000..c3f6d3a --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/command/program.go @@ -0,0 +1,180 @@ +package command + +import ( + "fmt" + "io" + "os" + "strings" + + "github.com/onsi/ginkgo/v2/formatter" + "github.com/onsi/ginkgo/v2/types" +) + +type Program struct { + Name string + Heading string + Commands []Command + DefaultCommand Command + DeprecatedCommands []DeprecatedCommand + + //For testing - leave as nil in production + OutWriter io.Writer + ErrWriter io.Writer + Exiter func(code int) +} + +type DeprecatedCommand struct { + Name string + Deprecation types.Deprecation +} + +func (p Program) RunAndExit(osArgs []string) { + var command Command + deprecationTracker := types.NewDeprecationTracker() + if p.Exiter == nil { + p.Exiter = os.Exit + } + if p.OutWriter == nil { + p.OutWriter = formatter.ColorableStdOut + } + if p.ErrWriter == nil { + p.ErrWriter = formatter.ColorableStdErr + } + + defer func() { + exitCode := 0 + + if r := recover(); r != nil { + details, ok := r.(AbortDetails) + if !ok { + panic(r) + } + + if details.Error != nil { + fmt.Fprintln(p.ErrWriter, formatter.F("{{red}}{{bold}}%s %s{{/}} {{red}}failed{{/}}", p.Name, command.Name)) + fmt.Fprintln(p.ErrWriter, formatter.Fi(1, details.Error.Error())) + } + if details.EmitUsage { + if details.Error != nil { + fmt.Fprintln(p.ErrWriter, "") + } + command.EmitUsage(p.ErrWriter) + } + exitCode = details.ExitCode + } + + command.Flags.ValidateDeprecations(deprecationTracker) + if deprecationTracker.DidTrackDeprecations() { + fmt.Fprintln(p.ErrWriter, deprecationTracker.DeprecationsReport()) + } + p.Exiter(exitCode) + }() + + args, additionalArgs := []string{}, []string{} + + foundDelimiter := false + for _, arg := range osArgs[1:] { + if !foundDelimiter { + if arg == "--" { + foundDelimiter = true + continue + } + } + + if foundDelimiter { + additionalArgs = append(additionalArgs, arg) + } else { + args = append(args, arg) + } + } + + command = p.DefaultCommand + if len(args) > 0 { + p.handleHelpRequestsAndExit(p.OutWriter, args) + if command.Name == args[0] { + args = args[1:] + } else { + for _, deprecatedCommand := range p.DeprecatedCommands { + if deprecatedCommand.Name == args[0] { + deprecationTracker.TrackDeprecation(deprecatedCommand.Deprecation) + return + } + } + for _, tryCommand := range p.Commands { + if tryCommand.Name == args[0] { + command, args = tryCommand, args[1:] + break + } + } + } + } + + command.Run(args, additionalArgs) +} + +func (p Program) handleHelpRequestsAndExit(writer io.Writer, args []string) { + if len(args) == 0 { + return + } + + matchesHelpFlag := func(args ...string) bool { + for _, arg := range args { + if arg == "--help" || arg == "-help" || arg == "-h" || arg == "--h" { + return true + } + } + return false + } + if len(args) == 1 { + if args[0] == "help" || matchesHelpFlag(args[0]) { + p.EmitUsage(writer) + Abort(AbortDetails{}) + } + } else { + var name string + if args[0] == "help" || matchesHelpFlag(args[0]) { + name = args[1] + } else if matchesHelpFlag(args[1:]...) { + name = args[0] + } else { + return + } + + if p.DefaultCommand.Name == name || p.Name == name { + p.DefaultCommand.EmitUsage(writer) + Abort(AbortDetails{}) + } + for _, command := range p.Commands { + if command.Name == name { + command.EmitUsage(writer) + Abort(AbortDetails{}) + } + } + + fmt.Fprintln(writer, formatter.F("{{red}}Unknown Command: {{bold}}%s{{/}}", name)) + fmt.Fprintln(writer, "") + p.EmitUsage(writer) + Abort(AbortDetails{ExitCode: 1}) + } +} + +func (p Program) EmitUsage(writer io.Writer) { + fmt.Fprintln(writer, formatter.F(p.Heading)) + fmt.Fprintln(writer, formatter.F("{{gray}}%s{{/}}", strings.Repeat("-", len(p.Heading)))) + fmt.Fprintln(writer, formatter.F("For usage information for a command, run {{bold}}%s help COMMAND{{/}}.", p.Name)) + fmt.Fprintln(writer, formatter.F("For usage information for the default command, run {{bold}}%s help %s{{/}} or {{bold}}%s help %s{{/}}.", p.Name, p.Name, p.Name, p.DefaultCommand.Name)) + fmt.Fprintln(writer, "") + fmt.Fprintln(writer, formatter.F("The following commands are available:")) + + fmt.Fprintln(writer, formatter.Fi(1, "{{bold}}%s{{/}} or %s {{bold}}%s{{/}} - {{gray}}%s{{/}}", p.Name, p.Name, p.DefaultCommand.Name, p.DefaultCommand.Usage)) + if p.DefaultCommand.ShortDoc != "" { + fmt.Fprintln(writer, formatter.Fi(2, p.DefaultCommand.ShortDoc)) + } + + for _, command := range p.Commands { + fmt.Fprintln(writer, formatter.Fi(1, "{{bold}}%s{{/}} - {{gray}}%s{{/}}", command.Name, command.Usage)) + if command.ShortDoc != "" { + fmt.Fprintln(writer, formatter.Fi(2, command.ShortDoc)) + } + } +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/generators/boostrap_templates.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/generators/boostrap_templates.go new file mode 100644 index 0000000..a367a1f --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/generators/boostrap_templates.go @@ -0,0 +1,48 @@ +package generators + +var bootstrapText = `package {{.Package}} + +import ( + "testing" + + {{.GinkgoImport}} + {{.GomegaImport}} +) + +func Test{{.FormattedName}}(t *testing.T) { + {{.GomegaPackage}}RegisterFailHandler({{.GinkgoPackage}}Fail) + {{.GinkgoPackage}}RunSpecs(t, "{{.FormattedName}} Suite") +} +` + +var agoutiBootstrapText = `package {{.Package}} + +import ( + "testing" + + {{.GinkgoImport}} + {{.GomegaImport}} + "github.com/sclevine/agouti" +) + +func Test{{.FormattedName}}(t *testing.T) { + {{.GomegaPackage}}RegisterFailHandler({{.GinkgoPackage}}Fail) + {{.GinkgoPackage}}RunSpecs(t, "{{.FormattedName}} Suite") +} + +var agoutiDriver *agouti.WebDriver + +var _ = {{.GinkgoPackage}}BeforeSuite(func() { + // Choose a WebDriver: + + agoutiDriver = agouti.PhantomJS() + // agoutiDriver = agouti.Selenium() + // agoutiDriver = agouti.ChromeDriver() + + {{.GomegaPackage}}Expect(agoutiDriver.Start()).To({{.GomegaPackage}}Succeed()) +}) + +var _ = {{.GinkgoPackage}}AfterSuite(func() { + {{.GomegaPackage}}Expect(agoutiDriver.Stop()).To({{.GomegaPackage}}Succeed()) +}) +` diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/generators/bootstrap_command.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/generators/bootstrap_command.go new file mode 100644 index 0000000..b2dc59b --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/generators/bootstrap_command.go @@ -0,0 +1,133 @@ +package generators + +import ( + "bytes" + "encoding/json" + "fmt" + "os" + "text/template" + + sprig "github.com/go-task/slim-sprig/v3" + "github.com/onsi/ginkgo/v2/ginkgo/command" + "github.com/onsi/ginkgo/v2/ginkgo/internal" + "github.com/onsi/ginkgo/v2/types" +) + +func BuildBootstrapCommand() command.Command { + conf := GeneratorsConfig{} + flags, err := types.NewGinkgoFlagSet( + types.GinkgoFlags{ + {Name: "agouti", KeyPath: "Agouti", + Usage: "If set, bootstrap will generate a bootstrap file for writing Agouti tests"}, + {Name: "nodot", KeyPath: "NoDot", + Usage: "If set, bootstrap will generate a bootstrap test file that does not dot-import ginkgo and gomega"}, + {Name: "internal", KeyPath: "Internal", + Usage: "If set, bootstrap will generate a bootstrap test file that uses the regular package name (i.e. `package X`, not `package X_test`)"}, + {Name: "template", KeyPath: "CustomTemplate", + UsageArgument: "template-file", + Usage: "If specified, generate will use the contents of the file passed as the bootstrap template"}, + {Name: "template-data", KeyPath: "CustomTemplateData", + UsageArgument: "template-data-file", + Usage: "If specified, generate will use the contents of the file passed as data to be rendered in the bootstrap template"}, + }, + &conf, + types.GinkgoFlagSections{}, + ) + + if err != nil { + panic(err) + } + + return command.Command{ + Name: "bootstrap", + Usage: "ginkgo bootstrap", + ShortDoc: "Bootstrap a test suite for the current package", + Documentation: `Tests written in Ginkgo and Gomega require a small amount of boilerplate to hook into Go's testing infrastructure. + +{{bold}}ginkgo bootstrap{{/}} generates this boilerplate for you in a file named X_suite_test.go where X is the name of the package under test.`, + DocLink: "generators", + Flags: flags, + Command: func(_ []string, _ []string) { + generateBootstrap(conf) + }, + } +} + +type bootstrapData struct { + Package string + FormattedName string + + GinkgoImport string + GomegaImport string + GinkgoPackage string + GomegaPackage string + CustomData map[string]any +} + +func generateBootstrap(conf GeneratorsConfig) { + packageName, bootstrapFilePrefix, formattedName := getPackageAndFormattedName() + + data := bootstrapData{ + Package: determinePackageName(packageName, conf.Internal), + FormattedName: formattedName, + + GinkgoImport: `. "github.com/onsi/ginkgo/v2"`, + GomegaImport: `. "github.com/onsi/gomega"`, + GinkgoPackage: "", + GomegaPackage: "", + } + + if conf.NoDot { + data.GinkgoImport = `"github.com/onsi/ginkgo/v2"` + data.GomegaImport = `"github.com/onsi/gomega"` + data.GinkgoPackage = `ginkgo.` + data.GomegaPackage = `gomega.` + } + + targetFile := fmt.Sprintf("%s_suite_test.go", bootstrapFilePrefix) + if internal.FileExists(targetFile) { + command.AbortWith("{{bold}}%s{{/}} already exists", targetFile) + } else { + fmt.Printf("Generating ginkgo test suite bootstrap for %s in:\n\t%s\n", packageName, targetFile) + } + + f, err := os.Create(targetFile) + command.AbortIfError("Failed to create file:", err) + defer f.Close() + + var templateText string + if conf.CustomTemplate != "" { + tpl, err := os.ReadFile(conf.CustomTemplate) + command.AbortIfError("Failed to read custom bootstrap file:", err) + templateText = string(tpl) + if conf.CustomTemplateData != "" { + var tplCustomDataMap map[string]any + tplCustomData, err := os.ReadFile(conf.CustomTemplateData) + command.AbortIfError("Failed to read custom boostrap data file:", err) + if !json.Valid([]byte(tplCustomData)) { + command.AbortWith("Invalid JSON object in custom data file.") + } + //create map from the custom template data + json.Unmarshal(tplCustomData, &tplCustomDataMap) + data.CustomData = tplCustomDataMap + } + } else if conf.Agouti { + templateText = agoutiBootstrapText + } else { + templateText = bootstrapText + } + + //Setting the option to explicitly fail if template is rendered trying to access missing key + bootstrapTemplate, err := template.New("bootstrap").Funcs(sprig.TxtFuncMap()).Option("missingkey=error").Parse(templateText) + command.AbortIfError("Failed to parse bootstrap template:", err) + + buf := &bytes.Buffer{} + //Being explicit about failing sooner during template rendering + //when accessing custom data rather than during the go fmt command + err = bootstrapTemplate.Execute(buf, data) + command.AbortIfError("Failed to render bootstrap template:", err) + + buf.WriteTo(f) + + internal.GoFmt(targetFile) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/generators/generate_command.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/generators/generate_command.go new file mode 100644 index 0000000..cf3b7cb --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/generators/generate_command.go @@ -0,0 +1,265 @@ +package generators + +import ( + "bytes" + "encoding/json" + "fmt" + "os" + "path/filepath" + "strconv" + "strings" + "text/template" + + sprig "github.com/go-task/slim-sprig/v3" + "github.com/onsi/ginkgo/v2/ginkgo/command" + "github.com/onsi/ginkgo/v2/ginkgo/internal" + "github.com/onsi/ginkgo/v2/types" +) + +func BuildGenerateCommand() command.Command { + conf := GeneratorsConfig{} + flags, err := types.NewGinkgoFlagSet( + types.GinkgoFlags{ + {Name: "agouti", KeyPath: "Agouti", + Usage: "If set, generate will create a test file for writing Agouti tests"}, + {Name: "nodot", KeyPath: "NoDot", + Usage: "If set, generate will create a test file that does not dot-import ginkgo and gomega"}, + {Name: "internal", KeyPath: "Internal", + Usage: "If set, generate will create a test file that uses the regular package name (i.e. `package X`, not `package X_test`)"}, + {Name: "template", KeyPath: "CustomTemplate", + UsageArgument: "template-file", + Usage: "If specified, generate will use the contents of the file passed as the test file template"}, + {Name: "template-data", KeyPath: "CustomTemplateData", + UsageArgument: "template-data-file", + Usage: "If specified, generate will use the contents of the file passed as data to be rendered in the test file template"}, + {Name: "tags", KeyPath: "Tags", + UsageArgument: "build-tags", + Usage: "If specified, generate will create a test file that uses the given build tags (i.e. `--tags e2e,!unit` will add `//go:build e2e,!unit`)"}, + }, + &conf, + types.GinkgoFlagSections{}, + ) + + if err != nil { + panic(err) + } + + return command.Command{ + Name: "generate", + Usage: "ginkgo generate ", + ShortDoc: "Generate a test file named _test.go", + Documentation: `If the optional argument is omitted, a file named after the package in the current directory will be created. + +You can pass multiple to generate multiple files simultaneously. The resulting files are named _test.go. + +You can also pass a of the form "file.go" and generate will emit "file_test.go".`, + DocLink: "generators", + Flags: flags, + Command: func(args []string, _ []string) { + generateTestFiles(conf, args) + }, + } +} + +type specData struct { + BuildTags string + Package string + Subject string + PackageImportPath string + ImportPackage bool + + GinkgoImport string + GomegaImport string + GinkgoPackage string + GomegaPackage string + CustomData map[string]any +} + +func generateTestFiles(conf GeneratorsConfig, args []string) { + subjects := args + if len(subjects) == 0 { + subjects = []string{""} + } + for _, subject := range subjects { + generateTestFileForSubject(subject, conf) + } +} + +func generateTestFileForSubject(subject string, conf GeneratorsConfig) { + packageName, specFilePrefix, formattedName := getPackageAndFormattedName() + if subject != "" { + specFilePrefix = formatSubject(subject) + formattedName = prettifyName(specFilePrefix) + } + + if conf.Internal { + specFilePrefix = specFilePrefix + "_internal" + } + + data := specData{ + BuildTags: getBuildTags(conf.Tags), + Package: determinePackageName(packageName, conf.Internal), + Subject: formattedName, + PackageImportPath: getPackageImportPath(), + ImportPackage: !conf.Internal, + + GinkgoImport: `. "github.com/onsi/ginkgo/v2"`, + GomegaImport: `. "github.com/onsi/gomega"`, + GinkgoPackage: "", + GomegaPackage: "", + } + + if conf.NoDot { + data.GinkgoImport = `"github.com/onsi/ginkgo/v2"` + data.GomegaImport = `"github.com/onsi/gomega"` + data.GinkgoPackage = `ginkgo.` + data.GomegaPackage = `gomega.` + } + + targetFile := fmt.Sprintf("%s_test.go", specFilePrefix) + if internal.FileExists(targetFile) { + command.AbortWith("{{bold}}%s{{/}} already exists", targetFile) + } else { + fmt.Printf("Generating ginkgo test for %s in:\n %s\n", data.Subject, targetFile) + } + + f, err := os.Create(targetFile) + command.AbortIfError("Failed to create test file:", err) + defer f.Close() + + var templateText string + if conf.CustomTemplate != "" { + tpl, err := os.ReadFile(conf.CustomTemplate) + command.AbortIfError("Failed to read custom template file:", err) + templateText = string(tpl) + if conf.CustomTemplateData != "" { + var tplCustomDataMap map[string]any + tplCustomData, err := os.ReadFile(conf.CustomTemplateData) + command.AbortIfError("Failed to read custom template data file:", err) + if !json.Valid([]byte(tplCustomData)) { + command.AbortWith("Invalid JSON object in custom data file.") + } + //create map from the custom template data + json.Unmarshal(tplCustomData, &tplCustomDataMap) + data.CustomData = tplCustomDataMap + } + } else if conf.Agouti { + templateText = agoutiSpecText + } else { + templateText = specText + } + + //Setting the option to explicitly fail if template is rendered trying to access missing key + specTemplate, err := template.New("spec").Funcs(sprig.TxtFuncMap()).Option("missingkey=error").Parse(templateText) + command.AbortIfError("Failed to read parse test template:", err) + + //Being explicit about failing sooner during template rendering + //when accessing custom data rather than during the go fmt command + err = specTemplate.Execute(f, data) + command.AbortIfError("Failed to render bootstrap template:", err) + internal.GoFmt(targetFile) +} + +func formatSubject(name string) string { + name = strings.ReplaceAll(name, "-", "_") + name = strings.ReplaceAll(name, " ", "_") + name = strings.Split(name, ".go")[0] + name = strings.Split(name, "_test")[0] + return name +} + +// moduleName returns module name from go.mod from given module root directory +func moduleName(modRoot string) string { + modFile, err := os.Open(filepath.Join(modRoot, "go.mod")) + if err != nil { + return "" + } + defer modFile.Close() + + mod := make([]byte, 128) + _, err = modFile.Read(mod) + if err != nil { + return "" + } + + slashSlash := []byte("//") + moduleStr := []byte("module") + + for len(mod) > 0 { + line := mod + mod = nil + if i := bytes.IndexByte(line, '\n'); i >= 0 { + line, mod = line[:i], line[i+1:] + } + if i := bytes.Index(line, slashSlash); i >= 0 { + line = line[:i] + } + line = bytes.TrimSpace(line) + if !bytes.HasPrefix(line, moduleStr) { + continue + } + line = line[len(moduleStr):] + n := len(line) + line = bytes.TrimSpace(line) + if len(line) == n || len(line) == 0 { + continue + } + + if line[0] == '"' || line[0] == '`' { + p, err := strconv.Unquote(string(line)) + if err != nil { + return "" // malformed quoted string or multiline module path + } + return p + } + + return string(line) + } + + return "" // missing module path +} + +func findModuleRoot(dir string) (root string) { + dir = filepath.Clean(dir) + + // Look for enclosing go.mod. + for { + if fi, err := os.Stat(filepath.Join(dir, "go.mod")); err == nil && !fi.IsDir() { + return dir + } + d := filepath.Dir(dir) + if d == dir { + break + } + dir = d + } + return "" +} + +func getPackageImportPath() string { + workingDir, err := os.Getwd() + if err != nil { + panic(err.Error()) + } + + sep := string(filepath.Separator) + + // Try go.mod file first + modRoot := findModuleRoot(workingDir) + if modRoot != "" { + modName := moduleName(modRoot) + if modName != "" { + cd := strings.ReplaceAll(workingDir, modRoot, "") + cd = strings.ReplaceAll(cd, sep, "/") + return modName + cd + } + } + + // Fallback to GOPATH structure + paths := strings.Split(workingDir, sep+"src"+sep) + if len(paths) == 1 { + fmt.Printf("\nCouldn't identify package import path.\n\n\tginkgo generate\n\nMust be run within a package directory under $GOPATH/src/...\nYou're going to have to change UNKNOWN_PACKAGE_PATH in the generated file...\n\n") + return "UNKNOWN_PACKAGE_PATH" + } + return filepath.ToSlash(paths[len(paths)-1]) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/generators/generate_templates.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/generators/generate_templates.go new file mode 100644 index 0000000..4dab07d --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/generators/generate_templates.go @@ -0,0 +1,43 @@ +package generators + +var specText = `{{.BuildTags}} +package {{.Package}} + +import ( + {{.GinkgoImport}} + {{.GomegaImport}} + + {{if .ImportPackage}}"{{.PackageImportPath}}"{{end}} +) + +var _ = {{.GinkgoPackage}}Describe("{{.Subject}}", func() { + +}) +` + +var agoutiSpecText = `{{.BuildTags}} +package {{.Package}} + +import ( + {{.GinkgoImport}} + {{.GomegaImport}} + "github.com/sclevine/agouti" + . "github.com/sclevine/agouti/matchers" + + {{if .ImportPackage}}"{{.PackageImportPath}}"{{end}} +) + +var _ = {{.GinkgoPackage}}Describe("{{.Subject}}", func() { + var page *agouti.Page + + {{.GinkgoPackage}}BeforeEach(func() { + var err error + page, err = agoutiDriver.NewPage() + {{.GomegaPackage}}Expect(err).NotTo({{.GomegaPackage}}HaveOccurred()) + }) + + {{.GinkgoPackage}}AfterEach(func() { + {{.GomegaPackage}}Expect(page.Destroy()).To({{.GomegaPackage}}Succeed()) + }) +}) +` diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/generators/generators_common.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/generators/generators_common.go new file mode 100644 index 0000000..28c7aa6 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/generators/generators_common.go @@ -0,0 +1,76 @@ +package generators + +import ( + "fmt" + "go/build" + "os" + "path/filepath" + "strconv" + "strings" + + "github.com/onsi/ginkgo/v2/ginkgo/command" +) + +type GeneratorsConfig struct { + Agouti, NoDot, Internal bool + CustomTemplate string + CustomTemplateData string + Tags string +} + +func getPackageAndFormattedName() (string, string, string) { + path, err := os.Getwd() + command.AbortIfError("Could not get current working directory:", err) + + dirName := strings.ReplaceAll(filepath.Base(path), "-", "_") + dirName = strings.ReplaceAll(dirName, " ", "_") + + pkg, err := build.ImportDir(path, 0) + packageName := pkg.Name + if err != nil { + packageName = ensureLegalPackageName(dirName) + } + + formattedName := prettifyName(filepath.Base(path)) + return packageName, dirName, formattedName +} + +func ensureLegalPackageName(name string) string { + if name == "_" { + return "underscore" + } + if len(name) == 0 { + return "empty" + } + n, isDigitErr := strconv.Atoi(string(name[0])) + if isDigitErr == nil { + return []string{"zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"}[n] + name[1:] + } + return name +} + +func prettifyName(name string) string { + name = strings.ReplaceAll(name, "-", " ") + name = strings.ReplaceAll(name, "_", " ") + name = strings.Title(name) + name = strings.ReplaceAll(name, " ", "") + return name +} + +func determinePackageName(name string, internal bool) string { + if internal { + return name + } + + return name + "_test" +} + +// getBuildTags returns the resultant string to be added. +// If the input string is not empty, then returns a `//go:build {}` string, +// otherwise returns an empty string. +func getBuildTags(tags string) string { + if tags != "" { + return fmt.Sprintf("//go:build %s\n", tags) + } + return "" +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/compile.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/compile.go new file mode 100644 index 0000000..7bbe6be --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/compile.go @@ -0,0 +1,173 @@ +package internal + +import ( + "fmt" + "os" + "os/exec" + "path/filepath" + "strings" + "sync" + + "github.com/onsi/ginkgo/v2/types" +) + +func CompileSuite(suite TestSuite, goFlagsConfig types.GoFlagsConfig, preserveSymbols bool) TestSuite { + if suite.PathToCompiledTest != "" { + return suite + } + + suite.CompilationError = nil + + path, err := filepath.Abs(filepath.Join(suite.Path, suite.PackageName+".test")) + if err != nil { + suite.State = TestSuiteStateFailedToCompile + suite.CompilationError = fmt.Errorf("Failed to compute compilation target path:\n%s", err.Error()) + return suite + } + + if len(goFlagsConfig.O) > 0 { + userDefinedPath, err := filepath.Abs(goFlagsConfig.O) + if err != nil { + suite.State = TestSuiteStateFailedToCompile + suite.CompilationError = fmt.Errorf("Failed to compute compilation target path %s:\n%s", goFlagsConfig.O, err.Error()) + return suite + } + path = userDefinedPath + } + + goFlagsConfig.O = path + + ginkgoInvocationPath, _ := os.Getwd() + ginkgoInvocationPath, _ = filepath.Abs(ginkgoInvocationPath) + packagePath := suite.AbsPath() + pathToInvocationPath, err := filepath.Rel(packagePath, ginkgoInvocationPath) + if err != nil { + suite.State = TestSuiteStateFailedToCompile + suite.CompilationError = fmt.Errorf("Failed to get relative path from package to the current working directory:\n%s", err.Error()) + return suite + } + args, err := types.GenerateGoTestCompileArgs(goFlagsConfig, "./", pathToInvocationPath, preserveSymbols) + if err != nil { + suite.State = TestSuiteStateFailedToCompile + suite.CompilationError = fmt.Errorf("Failed to generate go test compile flags:\n%s", err.Error()) + return suite + } + + cmd := exec.Command("go", args...) + cmd.Dir = suite.Path + output, err := cmd.CombinedOutput() + if err != nil { + if len(output) > 0 { + suite.State = TestSuiteStateFailedToCompile + suite.CompilationError = fmt.Errorf("Failed to compile %s:\n\n%s", suite.PackageName, output) + } else { + suite.State = TestSuiteStateFailedToCompile + suite.CompilationError = fmt.Errorf("Failed to compile %s\n%s", suite.PackageName, err.Error()) + } + return suite + } + + if strings.Contains(string(output), "[no test files]") { + suite.State = TestSuiteStateSkippedDueToEmptyCompilation + return suite + } + + if len(output) > 0 { + fmt.Println(string(output)) + } + + if !FileExists(path) { + suite.State = TestSuiteStateFailedToCompile + suite.CompilationError = fmt.Errorf("Failed to compile %s:\nOutput file %s could not be found", suite.PackageName, path) + return suite + } + + suite.State = TestSuiteStateCompiled + suite.PathToCompiledTest = path + return suite +} + +func Cleanup(goFlagsConfig types.GoFlagsConfig, suites ...TestSuite) { + if goFlagsConfig.BinaryMustBePreserved() { + return + } + for _, suite := range suites { + if !suite.Precompiled { + os.Remove(suite.PathToCompiledTest) + } + } +} + +type parallelSuiteBundle struct { + suite TestSuite + compiled chan TestSuite +} + +type OrderedParallelCompiler struct { + mutex *sync.Mutex + stopped bool + numCompilers int + + idx int + numSuites int + completionChannels []chan TestSuite +} + +func NewOrderedParallelCompiler(numCompilers int) *OrderedParallelCompiler { + return &OrderedParallelCompiler{ + mutex: &sync.Mutex{}, + numCompilers: numCompilers, + } +} + +func (opc *OrderedParallelCompiler) StartCompiling(suites TestSuites, goFlagsConfig types.GoFlagsConfig, preserveSymbols bool) { + opc.stopped = false + opc.idx = 0 + opc.numSuites = len(suites) + opc.completionChannels = make([]chan TestSuite, opc.numSuites) + + toCompile := make(chan parallelSuiteBundle, opc.numCompilers) + for compiler := 0; compiler < opc.numCompilers; compiler++ { + go func() { + for bundle := range toCompile { + c, suite := bundle.compiled, bundle.suite + opc.mutex.Lock() + stopped := opc.stopped + opc.mutex.Unlock() + if !stopped { + suite = CompileSuite(suite, goFlagsConfig, preserveSymbols) + } + c <- suite + } + }() + } + + for idx, suite := range suites { + opc.completionChannels[idx] = make(chan TestSuite, 1) + toCompile <- parallelSuiteBundle{suite, opc.completionChannels[idx]} + if idx == 0 { //compile first suite serially + suite = <-opc.completionChannels[0] + opc.completionChannels[0] <- suite + } + } + + close(toCompile) +} + +func (opc *OrderedParallelCompiler) Next() (int, TestSuite) { + if opc.idx >= opc.numSuites { + return opc.numSuites, TestSuite{} + } + + idx := opc.idx + suite := <-opc.completionChannels[idx] + opc.idx = opc.idx + 1 + + return idx, suite +} + +func (opc *OrderedParallelCompiler) StopAndDrain() { + opc.mutex.Lock() + opc.stopped = true + opc.mutex.Unlock() +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/gocovmerge.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/gocovmerge.go new file mode 100644 index 0000000..87cfa11 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/gocovmerge.go @@ -0,0 +1,129 @@ +// Copyright (c) 2015, Wade Simmons +// All rights reserved. + +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are met: + +// 1. Redistributions of source code must retain the above copyright notice, this +// list of conditions and the following disclaimer. +// 2. Redistributions in binary form must reproduce the above copyright notice, +// this list of conditions and the following disclaimer in the documentation +// and/or other materials provided with the distribution. + +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR +// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND +// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Package gocovmerge takes the results from multiple `go test -coverprofile` +// runs and merges them into one profile + +// this file was originally taken from the gocovmerge project +// see also: https://go.shabbyrobe.org/gocovmerge +package internal + +import ( + "fmt" + "io" + "sort" + + "golang.org/x/tools/cover" +) + +func AddCoverProfile(profiles []*cover.Profile, p *cover.Profile) []*cover.Profile { + i := sort.Search(len(profiles), func(i int) bool { return profiles[i].FileName >= p.FileName }) + if i < len(profiles) && profiles[i].FileName == p.FileName { + MergeCoverProfiles(profiles[i], p) + } else { + profiles = append(profiles, nil) + copy(profiles[i+1:], profiles[i:]) + profiles[i] = p + } + return profiles +} + +func DumpCoverProfiles(profiles []*cover.Profile, out io.Writer) error { + if len(profiles) == 0 { + return nil + } + if _, err := fmt.Fprintf(out, "mode: %s\n", profiles[0].Mode); err != nil { + return err + } + for _, p := range profiles { + for _, b := range p.Blocks { + if _, err := fmt.Fprintf(out, "%s:%d.%d,%d.%d %d %d\n", p.FileName, b.StartLine, b.StartCol, b.EndLine, b.EndCol, b.NumStmt, b.Count); err != nil { + return err + } + } + } + return nil +} + +func MergeCoverProfiles(into *cover.Profile, merge *cover.Profile) error { + if into.Mode != merge.Mode { + return fmt.Errorf("cannot merge profiles with different modes") + } + // Since the blocks are sorted, we can keep track of where the last block + // was inserted and only look at the blocks after that as targets for merge + startIndex := 0 + for _, b := range merge.Blocks { + var err error + startIndex, err = mergeProfileBlock(into, b, startIndex) + if err != nil { + return err + } + } + return nil +} + +func mergeProfileBlock(p *cover.Profile, pb cover.ProfileBlock, startIndex int) (int, error) { + sortFunc := func(i int) bool { + pi := p.Blocks[i+startIndex] + return pi.StartLine >= pb.StartLine && (pi.StartLine != pb.StartLine || pi.StartCol >= pb.StartCol) + } + + i := 0 + if !sortFunc(i) { + i = sort.Search(len(p.Blocks)-startIndex, sortFunc) + } + + i += startIndex + if i < len(p.Blocks) && p.Blocks[i].StartLine == pb.StartLine && p.Blocks[i].StartCol == pb.StartCol { + if p.Blocks[i].EndLine != pb.EndLine || p.Blocks[i].EndCol != pb.EndCol { + return i, fmt.Errorf("gocovmerge: overlapping merge %v %v %v", p.FileName, p.Blocks[i], pb) + } + switch p.Mode { + case "set": + p.Blocks[i].Count |= pb.Count + case "count", "atomic": + p.Blocks[i].Count += pb.Count + default: + return i, fmt.Errorf("gocovmerge: unsupported covermode '%s'", p.Mode) + } + + } else { + if i > 0 { + pa := p.Blocks[i-1] + if pa.EndLine >= pb.EndLine && (pa.EndLine != pb.EndLine || pa.EndCol > pb.EndCol) { + return i, fmt.Errorf("gocovmerge: overlap before %v %v %v", p.FileName, pa, pb) + } + } + if i < len(p.Blocks)-1 { + pa := p.Blocks[i+1] + if pa.StartLine <= pb.StartLine && (pa.StartLine != pb.StartLine || pa.StartCol < pb.StartCol) { + return i, fmt.Errorf("gocovmerge: overlap after %v %v %v", p.FileName, pa, pb) + } + } + p.Blocks = append(p.Blocks, cover.ProfileBlock{}) + copy(p.Blocks[i+1:], p.Blocks[i:]) + p.Blocks[i] = pb + } + + return i + 1, nil +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/profiles_and_reports.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/profiles_and_reports.go new file mode 100644 index 0000000..f3439a3 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/profiles_and_reports.go @@ -0,0 +1,230 @@ +package internal + +import ( + "fmt" + "os" + "os/exec" + "path/filepath" + "regexp" + "strconv" + + "github.com/google/pprof/profile" + "github.com/onsi/ginkgo/v2/reporters" + "github.com/onsi/ginkgo/v2/types" + "golang.org/x/tools/cover" +) + +func AbsPathForGeneratedAsset(assetName string, suite TestSuite, cliConfig types.CLIConfig, process int) string { + suffix := "" + if process != 0 { + suffix = fmt.Sprintf(".%d", process) + } + if cliConfig.OutputDir == "" { + return filepath.Join(suite.AbsPath(), assetName+suffix) + } + outputDir, _ := filepath.Abs(cliConfig.OutputDir) + return filepath.Join(outputDir, suite.NamespacedName()+"_"+assetName+suffix) +} + +func FinalizeProfilesAndReportsForSuites(suites TestSuites, cliConfig types.CLIConfig, suiteConfig types.SuiteConfig, reporterConfig types.ReporterConfig, goFlagsConfig types.GoFlagsConfig) ([]string, error) { + messages := []string{} + suitesWithProfiles := suites.WithState(TestSuiteStatePassed, TestSuiteStateFailed) //anything else won't have actually run and generated a profile + + // merge cover profiles if need be + if goFlagsConfig.Cover && !cliConfig.KeepSeparateCoverprofiles { + coverProfiles := []string{} + for _, suite := range suitesWithProfiles { + if !suite.HasProgrammaticFocus { + coverProfiles = append(coverProfiles, AbsPathForGeneratedAsset(goFlagsConfig.CoverProfile, suite, cliConfig, 0)) + } + } + + if len(coverProfiles) > 0 { + dst := goFlagsConfig.CoverProfile + if cliConfig.OutputDir != "" { + dst = filepath.Join(cliConfig.OutputDir, goFlagsConfig.CoverProfile) + } + err := MergeAndCleanupCoverProfiles(coverProfiles, dst) + if err != nil { + return messages, err + } + coverage, err := GetCoverageFromCoverProfile(dst) + if err != nil { + return messages, err + } + if coverage == 0 { + messages = append(messages, "composite coverage: [no statements]") + } else if suitesWithProfiles.AnyHaveProgrammaticFocus() { + messages = append(messages, fmt.Sprintf("composite coverage: %.1f%% of statements however some suites did not contribute because they included programatically focused specs", coverage)) + } else { + messages = append(messages, fmt.Sprintf("composite coverage: %.1f%% of statements", coverage)) + } + } else { + messages = append(messages, "no composite coverage computed: all suites included programatically focused specs") + } + } + + // copy binaries if need be + for _, suite := range suitesWithProfiles { + if goFlagsConfig.BinaryMustBePreserved() && cliConfig.OutputDir != "" { + src := suite.PathToCompiledTest + dst := filepath.Join(cliConfig.OutputDir, suite.NamespacedName()+".test") + if suite.Precompiled { + if err := CopyFile(src, dst); err != nil { + return messages, err + } + } else { + if err := os.Rename(src, dst); err != nil { + return messages, err + } + } + } + } + + type reportFormat struct { + ReportName string + GenerateFunc func(types.Report, string) error + MergeFunc func([]string, string) ([]string, error) + } + reportFormats := []reportFormat{} + if reporterConfig.JSONReport != "" { + reportFormats = append(reportFormats, reportFormat{ReportName: reporterConfig.JSONReport, GenerateFunc: reporters.GenerateJSONReport, MergeFunc: reporters.MergeAndCleanupJSONReports}) + } + if reporterConfig.GoJSONReport != "" { + reportFormats = append(reportFormats, reportFormat{ReportName: reporterConfig.GoJSONReport, GenerateFunc: reporters.GenerateGoTestJSONReport, MergeFunc: reporters.MergeAndCleanupGoTestJSONReports}) + } + if reporterConfig.JUnitReport != "" { + reportFormats = append(reportFormats, reportFormat{ReportName: reporterConfig.JUnitReport, GenerateFunc: reporters.GenerateJUnitReport, MergeFunc: reporters.MergeAndCleanupJUnitReports}) + } + if reporterConfig.TeamcityReport != "" { + reportFormats = append(reportFormats, reportFormat{ReportName: reporterConfig.TeamcityReport, GenerateFunc: reporters.GenerateTeamcityReport, MergeFunc: reporters.MergeAndCleanupTeamcityReports}) + } + + // Generate reports for suites that failed to run + reportableSuites := suites.ThatAreGinkgoSuites() + for _, suite := range reportableSuites.WithState(TestSuiteStateFailedToCompile, TestSuiteStateFailedDueToTimeout, TestSuiteStateSkippedDueToPriorFailures, TestSuiteStateSkippedDueToEmptyCompilation) { + report := types.Report{ + SuitePath: suite.AbsPath(), + SuiteConfig: suiteConfig, + SuiteSucceeded: false, + } + switch suite.State { + case TestSuiteStateFailedToCompile: + report.SpecialSuiteFailureReasons = append(report.SpecialSuiteFailureReasons, suite.CompilationError.Error()) + case TestSuiteStateFailedDueToTimeout: + report.SpecialSuiteFailureReasons = append(report.SpecialSuiteFailureReasons, TIMEOUT_ELAPSED_FAILURE_REASON) + case TestSuiteStateSkippedDueToPriorFailures: + report.SpecialSuiteFailureReasons = append(report.SpecialSuiteFailureReasons, PRIOR_FAILURES_FAILURE_REASON) + case TestSuiteStateSkippedDueToEmptyCompilation: + report.SpecialSuiteFailureReasons = append(report.SpecialSuiteFailureReasons, EMPTY_SKIP_FAILURE_REASON) + report.SuiteSucceeded = true + } + + for _, format := range reportFormats { + format.GenerateFunc(report, AbsPathForGeneratedAsset(format.ReportName, suite, cliConfig, 0)) + } + } + + // Merge reports unless we've been asked to keep them separate + if !cliConfig.KeepSeparateReports { + for _, format := range reportFormats { + reports := []string{} + for _, suite := range reportableSuites { + reports = append(reports, AbsPathForGeneratedAsset(format.ReportName, suite, cliConfig, 0)) + } + dst := format.ReportName + if cliConfig.OutputDir != "" { + dst = filepath.Join(cliConfig.OutputDir, format.ReportName) + } + mergeMessages, err := format.MergeFunc(reports, dst) + messages = append(messages, mergeMessages...) + if err != nil { + return messages, err + } + } + } + + return messages, nil +} + +// loads each profile, merges them, deletes them, stores them in destination +func MergeAndCleanupCoverProfiles(profiles []string, destination string) error { + var merged []*cover.Profile + for _, file := range profiles { + parsedProfiles, err := cover.ParseProfiles(file) + if err != nil { + return err + } + os.Remove(file) + for _, p := range parsedProfiles { + merged = AddCoverProfile(merged, p) + } + } + dst, err := os.OpenFile(destination, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666) + if err != nil { + return err + } + defer dst.Close() + err = DumpCoverProfiles(merged, dst) + if err != nil { + return err + } + return nil +} + +func GetCoverageFromCoverProfile(profile string) (float64, error) { + cmd := exec.Command("go", "tool", "cover", "-func", profile) + output, err := cmd.CombinedOutput() + if err != nil { + return 0, fmt.Errorf("Could not process Coverprofile %s: %s - %s", profile, err.Error(), string(output)) + } + re := regexp.MustCompile(`total:\s*\(statements\)\s*(\d*\.\d*)\%`) + matches := re.FindStringSubmatch(string(output)) + if matches == nil { + return 0, fmt.Errorf("Could not parse Coverprofile to compute coverage percentage") + } + coverageString := matches[1] + coverage, err := strconv.ParseFloat(coverageString, 64) + if err != nil { + return 0, fmt.Errorf("Could not parse Coverprofile to compute coverage percentage: %s", err.Error()) + } + + return coverage, nil +} + +func MergeProfiles(profilePaths []string, destination string) error { + profiles := []*profile.Profile{} + for _, profilePath := range profilePaths { + proFile, err := os.Open(profilePath) + if err != nil { + return fmt.Errorf("Could not open profile: %s\n%s", profilePath, err.Error()) + } + prof, err := profile.Parse(proFile) + _ = proFile.Close() + if err != nil { + return fmt.Errorf("Could not parse profile: %s\n%s", profilePath, err.Error()) + } + profiles = append(profiles, prof) + os.Remove(profilePath) + } + + mergedProfile, err := profile.Merge(profiles) + if err != nil { + return fmt.Errorf("Could not merge profiles:\n%s", err.Error()) + } + + outFile, err := os.Create(destination) + if err != nil { + return fmt.Errorf("Could not create merged profile %s:\n%s", destination, err.Error()) + } + err = mergedProfile.Write(outFile) + if err != nil { + return fmt.Errorf("Could not write merged profile %s:\n%s", destination, err.Error()) + } + err = outFile.Close() + if err != nil { + return fmt.Errorf("Could not close merged profile %s:\n%s", destination, err.Error()) + } + + return nil +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/run.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/run.go new file mode 100644 index 0000000..30d8096 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/run.go @@ -0,0 +1,361 @@ +package internal + +import ( + "bytes" + "fmt" + "io" + "os" + "os/exec" + "path/filepath" + "regexp" + "strings" + "syscall" + "time" + + "github.com/onsi/ginkgo/v2/formatter" + "github.com/onsi/ginkgo/v2/ginkgo/command" + "github.com/onsi/ginkgo/v2/internal/parallel_support" + "github.com/onsi/ginkgo/v2/reporters" + "github.com/onsi/ginkgo/v2/types" +) + +func RunCompiledSuite(suite TestSuite, ginkgoConfig types.SuiteConfig, reporterConfig types.ReporterConfig, cliConfig types.CLIConfig, goFlagsConfig types.GoFlagsConfig, additionalArgs []string) TestSuite { + suite.State = TestSuiteStateFailed + suite.HasProgrammaticFocus = false + + if suite.PathToCompiledTest == "" { + return suite + } + + if suite.IsGinkgo && cliConfig.ComputedProcs() > 1 { + suite = runParallel(suite, ginkgoConfig, reporterConfig, cliConfig, goFlagsConfig, additionalArgs) + } else if suite.IsGinkgo { + suite = runSerial(suite, ginkgoConfig, reporterConfig, cliConfig, goFlagsConfig, additionalArgs) + } else { + suite = runGoTest(suite, cliConfig, goFlagsConfig) + } + runAfterRunHook(cliConfig.AfterRunHook, reporterConfig.NoColor, suite) + return suite +} + +func buildAndStartCommand(suite TestSuite, args []string, pipeToStdout bool) (*exec.Cmd, *bytes.Buffer) { + buf := &bytes.Buffer{} + cmd := exec.Command(suite.PathToCompiledTest, args...) + cmd.Dir = suite.Path + if pipeToStdout { + cmd.Stderr = io.MultiWriter(os.Stdout, buf) + cmd.Stdout = os.Stdout + } else { + cmd.Stderr = buf + cmd.Stdout = buf + } + err := cmd.Start() + command.AbortIfError("Failed to start test suite", err) + + return cmd, buf +} + +func checkForNoTestsWarning(buf *bytes.Buffer) bool { + if strings.Contains(buf.String(), "warning: no tests to run") { + fmt.Fprintf(os.Stderr, `Found no test suites, did you forget to run "ginkgo bootstrap"?`) + return true + } + return false +} + +func runGoTest(suite TestSuite, cliConfig types.CLIConfig, goFlagsConfig types.GoFlagsConfig) TestSuite { + // As we run the go test from the suite directory, make sure the cover profile is absolute + // and placed into the expected output directory when one is configured. + if goFlagsConfig.Cover && !filepath.IsAbs(goFlagsConfig.CoverProfile) { + goFlagsConfig.CoverProfile = AbsPathForGeneratedAsset(goFlagsConfig.CoverProfile, suite, cliConfig, 0) + } + + args, err := types.GenerateGoTestRunArgs(goFlagsConfig) + command.AbortIfError("Failed to generate test run arguments", err) + cmd, buf := buildAndStartCommand(suite, args, true) + + cmd.Wait() + + exitStatus := cmd.ProcessState.Sys().(syscall.WaitStatus).ExitStatus() + passed := (exitStatus == 0) || (exitStatus == types.GINKGO_FOCUS_EXIT_CODE) + passed = !(checkForNoTestsWarning(buf) && cliConfig.RequireSuite) && passed + if passed { + suite.State = TestSuiteStatePassed + } else { + suite.State = TestSuiteStateFailed + } + + return suite +} + +func runSerial(suite TestSuite, ginkgoConfig types.SuiteConfig, reporterConfig types.ReporterConfig, cliConfig types.CLIConfig, goFlagsConfig types.GoFlagsConfig, additionalArgs []string) TestSuite { + if goFlagsConfig.Cover { + goFlagsConfig.CoverProfile = AbsPathForGeneratedAsset(goFlagsConfig.CoverProfile, suite, cliConfig, 0) + } + if goFlagsConfig.BlockProfile != "" { + goFlagsConfig.BlockProfile = AbsPathForGeneratedAsset(goFlagsConfig.BlockProfile, suite, cliConfig, 0) + } + if goFlagsConfig.CPUProfile != "" { + goFlagsConfig.CPUProfile = AbsPathForGeneratedAsset(goFlagsConfig.CPUProfile, suite, cliConfig, 0) + } + if goFlagsConfig.MemProfile != "" { + goFlagsConfig.MemProfile = AbsPathForGeneratedAsset(goFlagsConfig.MemProfile, suite, cliConfig, 0) + } + if goFlagsConfig.MutexProfile != "" { + goFlagsConfig.MutexProfile = AbsPathForGeneratedAsset(goFlagsConfig.MutexProfile, suite, cliConfig, 0) + } + if reporterConfig.JSONReport != "" { + reporterConfig.JSONReport = AbsPathForGeneratedAsset(reporterConfig.JSONReport, suite, cliConfig, 0) + } + if reporterConfig.GoJSONReport != "" { + reporterConfig.GoJSONReport = AbsPathForGeneratedAsset(reporterConfig.GoJSONReport, suite, cliConfig, 0) + } + if reporterConfig.JUnitReport != "" { + reporterConfig.JUnitReport = AbsPathForGeneratedAsset(reporterConfig.JUnitReport, suite, cliConfig, 0) + } + if reporterConfig.TeamcityReport != "" { + reporterConfig.TeamcityReport = AbsPathForGeneratedAsset(reporterConfig.TeamcityReport, suite, cliConfig, 0) + } + + args, err := types.GenerateGinkgoTestRunArgs(ginkgoConfig, reporterConfig, goFlagsConfig) + command.AbortIfError("Failed to generate test run arguments", err) + args = append([]string{"--test.timeout=0"}, args...) + args = append(args, additionalArgs...) + + cmd, buf := buildAndStartCommand(suite, args, true) + + cmd.Wait() + + exitStatus := cmd.ProcessState.Sys().(syscall.WaitStatus).ExitStatus() + suite.HasProgrammaticFocus = (exitStatus == types.GINKGO_FOCUS_EXIT_CODE) + passed := (exitStatus == 0) || (exitStatus == types.GINKGO_FOCUS_EXIT_CODE) + passed = !(checkForNoTestsWarning(buf) && cliConfig.RequireSuite) && passed + if passed { + suite.State = TestSuiteStatePassed + } else { + suite.State = TestSuiteStateFailed + } + + if suite.HasProgrammaticFocus { + if goFlagsConfig.Cover { + fmt.Fprintln(os.Stdout, "coverage: no coverfile was generated because specs are programmatically focused") + } + if goFlagsConfig.BlockProfile != "" { + fmt.Fprintln(os.Stdout, "no block profile was generated because specs are programmatically focused") + } + if goFlagsConfig.CPUProfile != "" { + fmt.Fprintln(os.Stdout, "no cpu profile was generated because specs are programmatically focused") + } + if goFlagsConfig.MemProfile != "" { + fmt.Fprintln(os.Stdout, "no mem profile was generated because specs are programmatically focused") + } + if goFlagsConfig.MutexProfile != "" { + fmt.Fprintln(os.Stdout, "no mutex profile was generated because specs are programmatically focused") + } + } + + return suite +} + +func runParallel(suite TestSuite, ginkgoConfig types.SuiteConfig, reporterConfig types.ReporterConfig, cliConfig types.CLIConfig, goFlagsConfig types.GoFlagsConfig, additionalArgs []string) TestSuite { + type procResult struct { + passed bool + hasProgrammaticFocus bool + } + + numProcs := cliConfig.ComputedProcs() + procOutput := make([]*bytes.Buffer, numProcs) + coverProfiles := []string{} + + blockProfiles := []string{} + cpuProfiles := []string{} + memProfiles := []string{} + mutexProfiles := []string{} + + procResults := make(chan procResult) + + server, err := parallel_support.NewServer(numProcs, reporters.NewDefaultReporter(reporterConfig, formatter.ColorableStdOut)) + command.AbortIfError("Failed to start parallel spec server", err) + server.Start() + defer server.Close() + + if reporterConfig.JSONReport != "" { + reporterConfig.JSONReport = AbsPathForGeneratedAsset(reporterConfig.JSONReport, suite, cliConfig, 0) + } + if reporterConfig.GoJSONReport != "" { + reporterConfig.GoJSONReport = AbsPathForGeneratedAsset(reporterConfig.GoJSONReport, suite, cliConfig, 0) + } + if reporterConfig.JUnitReport != "" { + reporterConfig.JUnitReport = AbsPathForGeneratedAsset(reporterConfig.JUnitReport, suite, cliConfig, 0) + } + if reporterConfig.TeamcityReport != "" { + reporterConfig.TeamcityReport = AbsPathForGeneratedAsset(reporterConfig.TeamcityReport, suite, cliConfig, 0) + } + + for proc := 1; proc <= numProcs; proc++ { + procGinkgoConfig := ginkgoConfig + procGinkgoConfig.ParallelProcess, procGinkgoConfig.ParallelTotal, procGinkgoConfig.ParallelHost = proc, numProcs, server.Address() + + procGoFlagsConfig := goFlagsConfig + if goFlagsConfig.Cover { + procGoFlagsConfig.CoverProfile = AbsPathForGeneratedAsset(goFlagsConfig.CoverProfile, suite, cliConfig, proc) + coverProfiles = append(coverProfiles, procGoFlagsConfig.CoverProfile) + } + if goFlagsConfig.BlockProfile != "" { + procGoFlagsConfig.BlockProfile = AbsPathForGeneratedAsset(goFlagsConfig.BlockProfile, suite, cliConfig, proc) + blockProfiles = append(blockProfiles, procGoFlagsConfig.BlockProfile) + } + if goFlagsConfig.CPUProfile != "" { + procGoFlagsConfig.CPUProfile = AbsPathForGeneratedAsset(goFlagsConfig.CPUProfile, suite, cliConfig, proc) + cpuProfiles = append(cpuProfiles, procGoFlagsConfig.CPUProfile) + } + if goFlagsConfig.MemProfile != "" { + procGoFlagsConfig.MemProfile = AbsPathForGeneratedAsset(goFlagsConfig.MemProfile, suite, cliConfig, proc) + memProfiles = append(memProfiles, procGoFlagsConfig.MemProfile) + } + if goFlagsConfig.MutexProfile != "" { + procGoFlagsConfig.MutexProfile = AbsPathForGeneratedAsset(goFlagsConfig.MutexProfile, suite, cliConfig, proc) + mutexProfiles = append(mutexProfiles, procGoFlagsConfig.MutexProfile) + } + + args, err := types.GenerateGinkgoTestRunArgs(procGinkgoConfig, reporterConfig, procGoFlagsConfig) + command.AbortIfError("Failed to generate test run arguments", err) + args = append([]string{"--test.timeout=0"}, args...) + args = append(args, additionalArgs...) + + cmd, buf := buildAndStartCommand(suite, args, false) + procOutput[proc-1] = buf + server.RegisterAlive(proc, func() bool { return cmd.ProcessState == nil || !cmd.ProcessState.Exited() }) + + go func() { + cmd.Wait() + exitStatus := cmd.ProcessState.Sys().(syscall.WaitStatus).ExitStatus() + procResults <- procResult{ + passed: (exitStatus == 0) || (exitStatus == types.GINKGO_FOCUS_EXIT_CODE), + hasProgrammaticFocus: exitStatus == types.GINKGO_FOCUS_EXIT_CODE, + } + }() + } + + passed := true + for proc := 1; proc <= cliConfig.ComputedProcs(); proc++ { + result := <-procResults + passed = passed && result.passed + suite.HasProgrammaticFocus = suite.HasProgrammaticFocus || result.hasProgrammaticFocus + } + if passed { + suite.State = TestSuiteStatePassed + } else { + suite.State = TestSuiteStateFailed + } + + select { + case <-server.GetSuiteDone(): + fmt.Println("") + case <-time.After(time.Second): + //one of the nodes never finished reporting to the server. Something must have gone wrong. + fmt.Fprint(formatter.ColorableStdErr, formatter.F("\n{{bold}}{{red}}Ginkgo timed out waiting for all parallel procs to report back{{/}}\n")) + fmt.Fprint(formatter.ColorableStdErr, formatter.F("{{gray}}Test suite:{{/}} %s (%s)\n\n", suite.PackageName, suite.Path)) + fmt.Fprint(formatter.ColorableStdErr, formatter.Fiw(0, formatter.COLS, "This occurs if a parallel process exits before it reports its results to the Ginkgo CLI. The CLI will now print out all the stdout/stderr output it's collected from the running processes. However you may not see anything useful in these logs because the individual test processes usually intercept output to stdout/stderr in order to capture it in the spec reports.\n\nYou may want to try rerunning your test suite with {{light-gray}}--output-interceptor-mode=none{{/}} to see additional output here and debug your suite.\n")) + fmt.Fprintln(formatter.ColorableStdErr, " ") + for proc := 1; proc <= cliConfig.ComputedProcs(); proc++ { + fmt.Fprintf(formatter.ColorableStdErr, formatter.F("{{bold}}Output from proc %d:{{/}}\n", proc)) + fmt.Fprintln(os.Stderr, formatter.Fi(1, "%s", procOutput[proc-1].String())) + } + fmt.Fprintf(os.Stderr, "** End **") + } + + for proc := 1; proc <= cliConfig.ComputedProcs(); proc++ { + output := procOutput[proc-1].String() + if proc == 1 && checkForNoTestsWarning(procOutput[0]) && cliConfig.RequireSuite { + suite.State = TestSuiteStateFailed + } + if strings.Contains(output, "deprecated Ginkgo functionality") { + fmt.Fprintln(os.Stderr, output) + } + } + + if len(coverProfiles) > 0 { + if suite.HasProgrammaticFocus { + fmt.Fprintln(os.Stdout, "coverage: no coverfile was generated because specs are programmatically focused") + } else { + coverProfile := AbsPathForGeneratedAsset(goFlagsConfig.CoverProfile, suite, cliConfig, 0) + err := MergeAndCleanupCoverProfiles(coverProfiles, coverProfile) + command.AbortIfError("Failed to combine cover profiles", err) + + coverage, err := GetCoverageFromCoverProfile(coverProfile) + command.AbortIfError("Failed to compute coverage", err) + if coverage == 0 { + fmt.Fprintln(os.Stdout, "coverage: [no statements]") + } else { + fmt.Fprintf(os.Stdout, "coverage: %.1f%% of statements\n", coverage) + } + } + } + if len(blockProfiles) > 0 { + if suite.HasProgrammaticFocus { + fmt.Fprintln(os.Stdout, "no block profile was generated because specs are programmatically focused") + } else { + blockProfile := AbsPathForGeneratedAsset(goFlagsConfig.BlockProfile, suite, cliConfig, 0) + err := MergeProfiles(blockProfiles, blockProfile) + command.AbortIfError("Failed to combine blockprofiles", err) + } + } + if len(cpuProfiles) > 0 { + if suite.HasProgrammaticFocus { + fmt.Fprintln(os.Stdout, "no cpu profile was generated because specs are programmatically focused") + } else { + cpuProfile := AbsPathForGeneratedAsset(goFlagsConfig.CPUProfile, suite, cliConfig, 0) + err := MergeProfiles(cpuProfiles, cpuProfile) + command.AbortIfError("Failed to combine cpuprofiles", err) + } + } + if len(memProfiles) > 0 { + if suite.HasProgrammaticFocus { + fmt.Fprintln(os.Stdout, "no mem profile was generated because specs are programmatically focused") + } else { + memProfile := AbsPathForGeneratedAsset(goFlagsConfig.MemProfile, suite, cliConfig, 0) + err := MergeProfiles(memProfiles, memProfile) + command.AbortIfError("Failed to combine memprofiles", err) + } + } + if len(mutexProfiles) > 0 { + if suite.HasProgrammaticFocus { + fmt.Fprintln(os.Stdout, "no mutex profile was generated because specs are programmatically focused") + } else { + mutexProfile := AbsPathForGeneratedAsset(goFlagsConfig.MutexProfile, suite, cliConfig, 0) + err := MergeProfiles(mutexProfiles, mutexProfile) + command.AbortIfError("Failed to combine mutexprofiles", err) + } + } + + return suite +} + +func runAfterRunHook(command string, noColor bool, suite TestSuite) { + if command == "" { + return + } + f := formatter.NewWithNoColorBool(noColor) + + // Allow for string replacement to pass input to the command + passed := "[FAIL]" + if suite.State.Is(TestSuiteStatePassed) { + passed = "[PASS]" + } + command = strings.ReplaceAll(command, "(ginkgo-suite-passed)", passed) + command = strings.ReplaceAll(command, "(ginkgo-suite-name)", suite.PackageName) + + // Must break command into parts + splitArgs := regexp.MustCompile(`'.+'|".+"|\S+`) + parts := splitArgs.FindAllString(command, -1) + + output, err := exec.Command(parts[0], parts[1:]...).CombinedOutput() + if err != nil { + fmt.Fprintln(formatter.ColorableStdOut, f.Fi(0, "{{red}}{{bold}}After-run-hook failed:{{/}}")) + fmt.Fprintln(formatter.ColorableStdOut, f.Fi(1, "{{red}}%s{{/}}", output)) + } else { + fmt.Fprintln(formatter.ColorableStdOut, f.Fi(0, "{{green}}{{bold}}After-run-hook succeeded:{{/}}")) + fmt.Fprintln(formatter.ColorableStdOut, f.Fi(1, "{{green}}%s{{/}}", output)) + } +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/test_suite.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/test_suite.go new file mode 100644 index 0000000..df99875 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/test_suite.go @@ -0,0 +1,284 @@ +package internal + +import ( + "errors" + "math/rand" + "os" + "path" + "path/filepath" + "regexp" + "runtime" + "strings" + + "github.com/onsi/ginkgo/v2/types" +) + +const TIMEOUT_ELAPSED_FAILURE_REASON = "Suite did not run because the timeout elapsed" +const PRIOR_FAILURES_FAILURE_REASON = "Suite did not run because prior suites failed and --keep-going is not set" +const EMPTY_SKIP_FAILURE_REASON = "Suite did not run go test reported that no test files were found" + +type TestSuiteState uint + +const ( + TestSuiteStateInvalid TestSuiteState = iota + + TestSuiteStateUncompiled + TestSuiteStateCompiled + + TestSuiteStatePassed + + TestSuiteStateSkippedDueToEmptyCompilation + TestSuiteStateSkippedByFilter + TestSuiteStateSkippedDueToPriorFailures + + TestSuiteStateFailed + TestSuiteStateFailedDueToTimeout + TestSuiteStateFailedToCompile +) + +var TestSuiteStateFailureStates = []TestSuiteState{TestSuiteStateFailed, TestSuiteStateFailedDueToTimeout, TestSuiteStateFailedToCompile} + +func (state TestSuiteState) Is(states ...TestSuiteState) bool { + for _, suiteState := range states { + if suiteState == state { + return true + } + } + + return false +} + +type TestSuite struct { + Path string + PackageName string + IsGinkgo bool + + Precompiled bool + PathToCompiledTest string + CompilationError error + + HasProgrammaticFocus bool + State TestSuiteState +} + +func (ts TestSuite) AbsPath() string { + path, _ := filepath.Abs(ts.Path) + return path +} + +func (ts TestSuite) NamespacedName() string { + name := relPath(ts.Path) + name = strings.TrimLeft(name, "."+string(filepath.Separator)) + name = strings.ReplaceAll(name, string(filepath.Separator), "_") + name = strings.ReplaceAll(name, " ", "_") + if name == "" { + return ts.PackageName + } + return name +} + +type TestSuites []TestSuite + +func (ts TestSuites) AnyHaveProgrammaticFocus() bool { + for _, suite := range ts { + if suite.HasProgrammaticFocus { + return true + } + } + + return false +} + +func (ts TestSuites) ThatAreGinkgoSuites() TestSuites { + out := TestSuites{} + for _, suite := range ts { + if suite.IsGinkgo { + out = append(out, suite) + } + } + return out +} + +func (ts TestSuites) CountWithState(states ...TestSuiteState) int { + n := 0 + for _, suite := range ts { + if suite.State.Is(states...) { + n += 1 + } + } + + return n +} + +func (ts TestSuites) WithState(states ...TestSuiteState) TestSuites { + out := TestSuites{} + for _, suite := range ts { + if suite.State.Is(states...) { + out = append(out, suite) + } + } + + return out +} + +func (ts TestSuites) WithoutState(states ...TestSuiteState) TestSuites { + out := TestSuites{} + for _, suite := range ts { + if !suite.State.Is(states...) { + out = append(out, suite) + } + } + + return out +} + +func (ts TestSuites) ShuffledCopy(seed int64) TestSuites { + out := make(TestSuites, len(ts)) + permutation := rand.New(rand.NewSource(seed)).Perm(len(ts)) + for i, j := range permutation { + out[i] = ts[j] + } + return out +} + +func FindSuites(args []string, cliConfig types.CLIConfig, allowPrecompiled bool) TestSuites { + suites := TestSuites{} + + if len(args) > 0 { + for _, arg := range args { + if allowPrecompiled { + suite, err := precompiledTestSuite(arg) + if err == nil { + suites = append(suites, suite) + continue + } + } + recurseForSuite := cliConfig.Recurse + if strings.HasSuffix(arg, "/...") && arg != "/..." { + arg = arg[:len(arg)-4] + recurseForSuite = true + } + suites = append(suites, suitesInDir(arg, recurseForSuite)...) + } + } else { + suites = suitesInDir(".", cliConfig.Recurse) + } + + if cliConfig.SkipPackage != "" { + skipFilters := strings.Split(cliConfig.SkipPackage, ",") + for idx := range suites { + for _, skipFilter := range skipFilters { + if strings.Contains(suites[idx].Path, skipFilter) { + suites[idx].State = TestSuiteStateSkippedByFilter + break + } + } + } + } + + return suites +} + +func precompiledTestSuite(path string) (TestSuite, error) { + info, err := os.Stat(path) + if err != nil { + return TestSuite{}, err + } + + if info.IsDir() { + return TestSuite{}, errors.New("this is a directory, not a file") + } + + if filepath.Ext(path) != ".test" && filepath.Ext(path) != ".exe" { + return TestSuite{}, errors.New("this is not a .test binary") + } + + if filepath.Ext(path) == ".test" && runtime.GOOS != "windows" && info.Mode()&0111 == 0 { + return TestSuite{}, errors.New("this is not executable") + } + + dir := relPath(filepath.Dir(path)) + packageName := strings.TrimSuffix(filepath.Base(path), ".exe") + packageName = strings.TrimSuffix(packageName, ".test") + + path, err = filepath.Abs(path) + if err != nil { + return TestSuite{}, err + } + + return TestSuite{ + Path: dir, + PackageName: packageName, + IsGinkgo: true, + Precompiled: true, + PathToCompiledTest: path, + State: TestSuiteStateCompiled, + }, nil +} + +func suitesInDir(dir string, recurse bool) TestSuites { + suites := TestSuites{} + + if path.Base(dir) == "vendor" { + return suites + } + + files, _ := os.ReadDir(dir) + re := regexp.MustCompile(`^[^._].*_test\.go$`) + for _, file := range files { + if !file.IsDir() && re.MatchString(file.Name()) { + suite := TestSuite{ + Path: relPath(dir), + PackageName: packageNameForSuite(dir), + IsGinkgo: filesHaveGinkgoSuite(dir, files), + State: TestSuiteStateUncompiled, + } + suites = append(suites, suite) + break + } + } + + if recurse { + re = regexp.MustCompile(`^[._]`) + for _, file := range files { + if file.IsDir() && !re.MatchString(file.Name()) { + suites = append(suites, suitesInDir(dir+"/"+file.Name(), recurse)...) + } + } + } + + return suites +} + +func relPath(dir string) string { + dir, _ = filepath.Abs(dir) + cwd, _ := os.Getwd() + dir, _ = filepath.Rel(cwd, filepath.Clean(dir)) + + if string(dir[0]) != "." { + dir = "." + string(filepath.Separator) + dir + } + + return dir +} + +func packageNameForSuite(dir string) string { + path, _ := filepath.Abs(dir) + return filepath.Base(path) +} + +func filesHaveGinkgoSuite(dir string, files []os.DirEntry) bool { + reTestFile := regexp.MustCompile(`_test\.go$`) + reGinkgo := regexp.MustCompile(`package ginkgo|\/ginkgo"|\/ginkgo\/v2"|\/ginkgo\/v2/dsl/`) + + for _, file := range files { + if !file.IsDir() && reTestFile.MatchString(file.Name()) { + contents, _ := os.ReadFile(dir + "/" + file.Name()) + if reGinkgo.Match(contents) { + return true + } + } + } + + return false +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/utils.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/utils.go new file mode 100644 index 0000000..bd9ca7d --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/utils.go @@ -0,0 +1,86 @@ +package internal + +import ( + "fmt" + "io" + "os" + "os/exec" + + "github.com/onsi/ginkgo/v2/formatter" + "github.com/onsi/ginkgo/v2/ginkgo/command" +) + +func FileExists(path string) bool { + _, err := os.Stat(path) + return err == nil +} + +func CopyFile(src string, dest string) error { + srcFile, err := os.Open(src) + if err != nil { + return err + } + + srcStat, err := srcFile.Stat() + if err != nil { + return err + } + + if _, err := os.Stat(dest); err == nil { + os.Remove(dest) + } + + destFile, err := os.OpenFile(dest, os.O_WRONLY|os.O_CREATE, srcStat.Mode()) + if err != nil { + return err + } + + _, err = io.Copy(destFile, srcFile) + if err != nil { + return err + } + + if err := srcFile.Close(); err != nil { + return err + } + return destFile.Close() +} + +func GoFmt(path string) { + out, err := exec.Command("go", "fmt", path).CombinedOutput() + if err != nil { + command.AbortIfError(fmt.Sprintf("Could not fmt:\n%s\n", string(out)), err) + } +} + +func PluralizedWord(singular, plural string, count int) string { + if count == 1 { + return singular + } + return plural +} + +func FailedSuitesReport(suites TestSuites, f formatter.Formatter) string { + out := "" + out += "There were failures detected in the following suites:\n" + + maxPackageNameLength := 0 + for _, suite := range suites.WithState(TestSuiteStateFailureStates...) { + if len(suite.PackageName) > maxPackageNameLength { + maxPackageNameLength = len(suite.PackageName) + } + } + + packageNameFormatter := fmt.Sprintf("%%%ds", maxPackageNameLength) + for _, suite := range suites { + switch suite.State { + case TestSuiteStateFailed: + out += f.Fi(1, "{{red}}"+packageNameFormatter+" {{gray}}%s{{/}}\n", suite.PackageName, suite.Path) + case TestSuiteStateFailedToCompile: + out += f.Fi(1, "{{red}}"+packageNameFormatter+" {{gray}}%s {{magenta}}[Compilation failure]{{/}}\n", suite.PackageName, suite.Path) + case TestSuiteStateFailedDueToTimeout: + out += f.Fi(1, "{{red}}"+packageNameFormatter+" {{gray}}%s {{orange}}[%s]{{/}}\n", suite.PackageName, suite.Path, TIMEOUT_ELAPSED_FAILURE_REASON) + } + } + return out +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/verify_version.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/verify_version.go new file mode 100644 index 0000000..9da1bab --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/internal/verify_version.go @@ -0,0 +1,54 @@ +package internal + +import ( + "fmt" + "os/exec" + "regexp" + "strings" + + "github.com/onsi/ginkgo/v2/formatter" + "github.com/onsi/ginkgo/v2/types" +) + +var versiorRe = regexp.MustCompile(`v(\d+\.\d+\.\d+)`) + +func VerifyCLIAndFrameworkVersion(suites TestSuites) { + cliVersion := types.VERSION + mismatches := map[string][]string{} + + for _, suite := range suites { + cmd := exec.Command("go", "list", "-m", "github.com/onsi/ginkgo/v2") + cmd.Dir = suite.Path + output, err := cmd.CombinedOutput() + if err != nil { + continue + } + components := strings.Split(string(output), " ") + if len(components) != 2 { + continue + } + matches := versiorRe.FindStringSubmatch(components[1]) + if matches == nil || len(matches) != 2 { + continue + } + libraryVersion := matches[1] + if cliVersion != libraryVersion { + mismatches[libraryVersion] = append(mismatches[libraryVersion], suite.PackageName) + } + } + + if len(mismatches) == 0 { + return + } + + fmt.Println(formatter.F("{{red}}{{bold}}Ginkgo detected a version mismatch between the Ginkgo CLI and the version of Ginkgo imported by your packages:{{/}}")) + + fmt.Println(formatter.Fi(1, "Ginkgo CLI Version:")) + fmt.Println(formatter.Fi(2, "{{bold}}%s{{/}}", cliVersion)) + fmt.Println(formatter.Fi(1, "Mismatched package versions found:")) + for version, packages := range mismatches { + fmt.Println(formatter.Fi(2, "{{bold}}%s{{/}} used by %s", version, strings.Join(packages, ", "))) + } + fmt.Println("") + fmt.Println(formatter.Fiw(1, formatter.COLS, "{{gray}}Ginkgo will continue to attempt to run but you may see errors (including flag parsing errors) and should either update your go.mod or your version of the Ginkgo CLI to match.\n\nTo install the matching version of the CLI run\n {{bold}}go install github.com/onsi/ginkgo/v2/ginkgo{{/}}{{gray}}\nfrom a path that contains a go.mod file. Alternatively you can use\n {{bold}}go run github.com/onsi/ginkgo/v2/ginkgo{{/}}{{gray}}\nfrom a path that contains a go.mod file to invoke the matching version of the Ginkgo CLI.\n\nIf you are attempting to test multiple packages that each have a different version of the Ginkgo library with a single Ginkgo CLI that is currently unsupported.\n{{/}}")) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/labels/labels_command.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/labels/labels_command.go new file mode 100644 index 0000000..6c61f09 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/labels/labels_command.go @@ -0,0 +1,123 @@ +package labels + +import ( + "fmt" + "go/ast" + "go/parser" + "go/token" + "sort" + "strconv" + "strings" + + "github.com/onsi/ginkgo/v2/ginkgo/command" + "github.com/onsi/ginkgo/v2/ginkgo/internal" + "github.com/onsi/ginkgo/v2/types" + "golang.org/x/tools/go/ast/inspector" +) + +func BuildLabelsCommand() command.Command { + var cliConfig = types.NewDefaultCLIConfig() + + flags, err := types.BuildLabelsCommandFlagSet(&cliConfig) + if err != nil { + panic(err) + } + + return command.Command{ + Name: "labels", + Usage: "ginkgo labels ", + Flags: flags, + ShortDoc: "List labels detected in the passed-in packages (or the package in the current directory if left blank).", + DocLink: "spec-labels", + Command: func(args []string, _ []string) { + ListLabels(args, cliConfig) + }, + } +} + +func ListLabels(args []string, cliConfig types.CLIConfig) { + suites := internal.FindSuites(args, cliConfig, false).WithoutState(internal.TestSuiteStateSkippedByFilter) + if len(suites) == 0 { + command.AbortWith("Found no test suites") + } + for _, suite := range suites { + labels := fetchLabelsFromPackage(suite.Path) + if len(labels) == 0 { + fmt.Printf("%s: No labels found\n", suite.PackageName) + } else { + fmt.Printf("%s: [%s]\n", suite.PackageName, strings.Join(labels, ", ")) + } + } +} + +func fetchLabelsFromPackage(packagePath string) []string { + fset := token.NewFileSet() + parsedPackages, err := parser.ParseDir(fset, packagePath, nil, 0) + command.AbortIfError("Failed to parse package source:", err) + + files := []*ast.File{} + hasTestPackage := false + for key, pkg := range parsedPackages { + if strings.HasSuffix(key, "_test") { + hasTestPackage = true + for _, file := range pkg.Files { + files = append(files, file) + } + } + } + if !hasTestPackage { + for _, pkg := range parsedPackages { + for _, file := range pkg.Files { + files = append(files, file) + } + } + } + + seen := map[string]bool{} + labels := []string{} + ispr := inspector.New(files) + ispr.Preorder([]ast.Node{&ast.CallExpr{}}, func(n ast.Node) { + potentialLabels := fetchLabels(n.(*ast.CallExpr)) + for _, label := range potentialLabels { + if !seen[label] { + seen[label] = true + labels = append(labels, strconv.Quote(label)) + } + } + }) + + sort.Strings(labels) + return labels +} + +func fetchLabels(callExpr *ast.CallExpr) []string { + out := []string{} + switch expr := callExpr.Fun.(type) { + case *ast.Ident: + if expr.Name != "Label" { + return out + } + case *ast.SelectorExpr: + if expr.Sel.Name != "Label" { + return out + } + default: + return out + } + for _, arg := range callExpr.Args { + switch expr := arg.(type) { + case *ast.BasicLit: + if expr.Kind == token.STRING { + unquoted, err := strconv.Unquote(expr.Value) + if err != nil { + unquoted = expr.Value + } + validated, err := types.ValidateAndCleanupLabel(unquoted, types.CodeLocation{}) + if err == nil { + out = append(out, validated) + } + } + } + } + return out +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/main.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/main.go new file mode 100644 index 0000000..419589b --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/main.go @@ -0,0 +1,57 @@ +package main + +import ( + "fmt" + "os" + "github.com/onsi/ginkgo/v2/ginkgo/build" + "github.com/onsi/ginkgo/v2/ginkgo/command" + "github.com/onsi/ginkgo/v2/ginkgo/generators" + "github.com/onsi/ginkgo/v2/ginkgo/labels" + "github.com/onsi/ginkgo/v2/ginkgo/outline" + "github.com/onsi/ginkgo/v2/ginkgo/run" + "github.com/onsi/ginkgo/v2/ginkgo/unfocus" + "github.com/onsi/ginkgo/v2/ginkgo/watch" + "github.com/onsi/ginkgo/v2/types" +) + +var program command.Program + +func GenerateCommands() []command.Command { + return []command.Command{ + watch.BuildWatchCommand(), + build.BuildBuildCommand(), + generators.BuildBootstrapCommand(), + generators.BuildGenerateCommand(), + labels.BuildLabelsCommand(), + outline.BuildOutlineCommand(), + unfocus.BuildUnfocusCommand(), + BuildVersionCommand(), + } +} + +func main() { + program = command.Program{ + Name: "ginkgo", + Heading: fmt.Sprintf("Ginkgo Version %s", types.VERSION), + Commands: GenerateCommands(), + DefaultCommand: run.BuildRunCommand(), + DeprecatedCommands: []command.DeprecatedCommand{ + {Name: "convert", Deprecation: types.Deprecations.Convert()}, + {Name: "blur", Deprecation: types.Deprecations.Blur()}, + {Name: "nodot", Deprecation: types.Deprecations.Nodot()}, + }, + } + + program.RunAndExit(os.Args) +} + +func BuildVersionCommand() command.Command { + return command.Command{ + Name: "version", + Usage: "ginkgo version", + ShortDoc: "Print Ginkgo's version", + Command: func(_ []string, _ []string) { + fmt.Printf("Ginkgo Version %s\n", types.VERSION) + }, + } +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/outline/ginkgo.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/outline/ginkgo.go new file mode 100644 index 0000000..5d8d00b --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/outline/ginkgo.go @@ -0,0 +1,301 @@ +package outline + +import ( + "go/ast" + "go/token" + "strconv" + + "github.com/onsi/ginkgo/v2/types" +) + +const ( + // undefinedTextAlt is used if the spec/container text cannot be derived + undefinedTextAlt = "undefined" +) + +// ginkgoMetadata holds useful bits of information for every entry in the outline +type ginkgoMetadata struct { + // Name is the spec or container function name, e.g. `Describe` or `It` + Name string `json:"name"` + + // Text is the `text` argument passed to specs, and some containers + Text string `json:"text"` + + // Start is the position of first character of the spec or container block + Start int `json:"start"` + + // End is the position of first character immediately after the spec or container block + End int `json:"end"` + + Spec bool `json:"spec"` + Focused bool `json:"focused"` + Pending bool `json:"pending"` + Labels []string `json:"labels"` +} + +// ginkgoNode is used to construct the outline as a tree +type ginkgoNode struct { + ginkgoMetadata + Nodes []*ginkgoNode `json:"nodes"` +} + +type walkFunc func(n *ginkgoNode) + +func (n *ginkgoNode) PreOrder(f walkFunc) { + f(n) + for _, m := range n.Nodes { + m.PreOrder(f) + } +} + +func (n *ginkgoNode) PostOrder(f walkFunc) { + for _, m := range n.Nodes { + m.PostOrder(f) + } + f(n) +} + +func (n *ginkgoNode) Walk(pre, post walkFunc) { + pre(n) + for _, m := range n.Nodes { + m.Walk(pre, post) + } + post(n) +} + +// PropagateInheritedProperties propagates the Pending and Focused properties +// through the subtree rooted at n. +func (n *ginkgoNode) PropagateInheritedProperties() { + n.PreOrder(func(thisNode *ginkgoNode) { + for _, descendantNode := range thisNode.Nodes { + if thisNode.Pending { + descendantNode.Pending = true + descendantNode.Focused = false + } + if thisNode.Focused && !descendantNode.Pending { + descendantNode.Focused = true + } + } + }) +} + +// BackpropagateUnfocus propagates the Focused property through the subtree +// rooted at n. It applies the rule described in the Ginkgo docs: +// > Nested programmatically focused specs follow a simple rule: if a +// > leaf-node is marked focused, any of its ancestor nodes that are marked +// > focus will be unfocused. +func (n *ginkgoNode) BackpropagateUnfocus() { + focusedSpecInSubtreeStack := []bool{} + n.PostOrder(func(thisNode *ginkgoNode) { + if thisNode.Spec { + focusedSpecInSubtreeStack = append(focusedSpecInSubtreeStack, thisNode.Focused) + return + } + focusedSpecInSubtree := false + for range thisNode.Nodes { + focusedSpecInSubtree = focusedSpecInSubtree || focusedSpecInSubtreeStack[len(focusedSpecInSubtreeStack)-1] + focusedSpecInSubtreeStack = focusedSpecInSubtreeStack[0 : len(focusedSpecInSubtreeStack)-1] + } + focusedSpecInSubtreeStack = append(focusedSpecInSubtreeStack, focusedSpecInSubtree) + if focusedSpecInSubtree { + thisNode.Focused = false + } + }) + +} + +func packageAndIdentNamesFromCallExpr(ce *ast.CallExpr) (string, string, bool) { + switch ex := ce.Fun.(type) { + case *ast.Ident: + return "", ex.Name, true + case *ast.SelectorExpr: + pkgID, ok := ex.X.(*ast.Ident) + if !ok { + return "", "", false + } + // A package identifier is top-level, so Obj must be nil + if pkgID.Obj != nil { + return "", "", false + } + if ex.Sel == nil { + return "", "", false + } + return pkgID.Name, ex.Sel.Name, true + default: + return "", "", false + } +} + +// absoluteOffsetsForNode derives the absolute character offsets of the node start and +// end positions. +func absoluteOffsetsForNode(fset *token.FileSet, n ast.Node) (start, end int) { + return fset.PositionFor(n.Pos(), false).Offset, fset.PositionFor(n.End(), false).Offset +} + +// ginkgoNodeFromCallExpr derives an outline entry from a go AST subtree +// corresponding to a Ginkgo container or spec. +func ginkgoNodeFromCallExpr(fset *token.FileSet, ce *ast.CallExpr, ginkgoPackageName *string) (*ginkgoNode, bool) { + packageName, identName, ok := packageAndIdentNamesFromCallExpr(ce) + if !ok { + return nil, false + } + + n := ginkgoNode{} + n.Name = identName + n.Start, n.End = absoluteOffsetsForNode(fset, ce) + n.Nodes = make([]*ginkgoNode, 0) + switch identName { + case "It", "Specify", "Entry": + n.Spec = true + n.Text = textOrAltFromCallExpr(ce, undefinedTextAlt) + n.Labels = labelFromCallExpr(ce) + n.Pending = pendingFromCallExpr(ce) + return &n, ginkgoPackageName != nil && *ginkgoPackageName == packageName + case "FIt", "FSpecify", "FEntry": + n.Spec = true + n.Focused = true + n.Text = textOrAltFromCallExpr(ce, undefinedTextAlt) + n.Labels = labelFromCallExpr(ce) + return &n, ginkgoPackageName != nil && *ginkgoPackageName == packageName + case "PIt", "PSpecify", "XIt", "XSpecify", "PEntry", "XEntry": + n.Spec = true + n.Pending = true + n.Text = textOrAltFromCallExpr(ce, undefinedTextAlt) + n.Labels = labelFromCallExpr(ce) + return &n, ginkgoPackageName != nil && *ginkgoPackageName == packageName + case "Context", "Describe", "When", "DescribeTable": + n.Text = textOrAltFromCallExpr(ce, undefinedTextAlt) + n.Labels = labelFromCallExpr(ce) + n.Pending = pendingFromCallExpr(ce) + return &n, ginkgoPackageName != nil && *ginkgoPackageName == packageName + case "FContext", "FDescribe", "FWhen", "FDescribeTable": + n.Focused = true + n.Text = textOrAltFromCallExpr(ce, undefinedTextAlt) + n.Labels = labelFromCallExpr(ce) + return &n, ginkgoPackageName != nil && *ginkgoPackageName == packageName + case "PContext", "PDescribe", "PWhen", "XContext", "XDescribe", "XWhen", "PDescribeTable", "XDescribeTable": + n.Pending = true + n.Text = textOrAltFromCallExpr(ce, undefinedTextAlt) + n.Labels = labelFromCallExpr(ce) + return &n, ginkgoPackageName != nil && *ginkgoPackageName == packageName + case "By": + n.Text = textOrAltFromCallExpr(ce, undefinedTextAlt) + return &n, ginkgoPackageName != nil && *ginkgoPackageName == packageName + case "AfterEach", "BeforeEach": + return &n, ginkgoPackageName != nil && *ginkgoPackageName == packageName + case "JustAfterEach", "JustBeforeEach": + return &n, ginkgoPackageName != nil && *ginkgoPackageName == packageName + case "AfterSuite", "BeforeSuite": + return &n, ginkgoPackageName != nil && *ginkgoPackageName == packageName + case "SynchronizedAfterSuite", "SynchronizedBeforeSuite": + return &n, ginkgoPackageName != nil && *ginkgoPackageName == packageName + default: + return nil, false + } +} + +// textOrAltFromCallExpr tries to derive the "text" of a Ginkgo spec or +// container. If it cannot derive it, it returns the alt text. +func textOrAltFromCallExpr(ce *ast.CallExpr, alt string) string { + text, defined := textFromCallExpr(ce) + if !defined { + return alt + } + return text +} + +// textFromCallExpr tries to derive the "text" of a Ginkgo spec or container. If +// it cannot derive it, it returns false. +func textFromCallExpr(ce *ast.CallExpr) (string, bool) { + if len(ce.Args) < 1 { + return "", false + } + text, ok := ce.Args[0].(*ast.BasicLit) + if !ok { + return "", false + } + switch text.Kind { + case token.CHAR, token.STRING: + // For token.CHAR and token.STRING, Value is quoted + unquoted, err := strconv.Unquote(text.Value) + if err != nil { + // If unquoting fails, just use the raw Value + return text.Value, true + } + return unquoted, true + default: + return text.Value, true + } +} + +func labelFromCallExpr(ce *ast.CallExpr) []string { + + labels := []string{} + if len(ce.Args) < 2 { + return labels + } + + for _, arg := range ce.Args[1:] { + switch expr := arg.(type) { + case *ast.CallExpr: + id, ok := expr.Fun.(*ast.Ident) + if !ok { + // to skip over cases where the expr.Fun. is actually *ast.SelectorExpr + continue + } + if id.Name == "Label" { + ls := extractLabels(expr) + labels = append(labels, ls...) + } + } + } + return labels +} + +func extractLabels(expr *ast.CallExpr) []string { + out := []string{} + for _, arg := range expr.Args { + switch expr := arg.(type) { + case *ast.BasicLit: + if expr.Kind == token.STRING { + unquoted, err := strconv.Unquote(expr.Value) + if err != nil { + unquoted = expr.Value + } + validated, err := types.ValidateAndCleanupLabel(unquoted, types.CodeLocation{}) + if err == nil { + out = append(out, validated) + } + } + } + } + + return out +} + +func pendingFromCallExpr(ce *ast.CallExpr) bool { + + pending := false + if len(ce.Args) < 2 { + return pending + } + + for _, arg := range ce.Args[1:] { + switch expr := arg.(type) { + case *ast.CallExpr: + id, ok := expr.Fun.(*ast.Ident) + if !ok { + // to skip over cases where the expr.Fun. is actually *ast.SelectorExpr + continue + } + if id.Name == "Pending" { + pending = true + } + case *ast.Ident: + if expr.Name == "Pending" { + pending = true + } + } + } + return pending +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/outline/import.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/outline/import.go new file mode 100644 index 0000000..f0a6b5d --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/outline/import.go @@ -0,0 +1,58 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Most of the required functions were available in the +// "golang.org/x/tools/go/ast/astutil" package, but not exported. +// They were copied from https://github.com/golang/tools/blob/2b0845dc783e36ae26d683f4915a5840ef01ab0f/go/ast/astutil/imports.go + +package outline + +import ( + "go/ast" + "strconv" + "strings" +) + +// packageNameForImport returns the package name for the package. If the package +// is not imported, it returns nil. "Package name" refers to `pkgname` in the +// call expression `pkgname.ExportedIdentifier`. Examples: +// (import path not found) -> nil +// "import example.com/pkg/foo" -> "foo" +// "import fooalias example.com/pkg/foo" -> "fooalias" +// "import . example.com/pkg/foo" -> "" +func packageNameForImport(f *ast.File, path string) *string { + spec := importSpec(f, path) + if spec == nil { + return nil + } + name := spec.Name.String() + if name == "" { + name = "ginkgo" + } + if name == "." { + name = "" + } + return &name +} + +// importSpec returns the import spec if f imports path, +// or nil otherwise. +func importSpec(f *ast.File, path string) *ast.ImportSpec { + for _, s := range f.Imports { + if strings.HasPrefix(importPath(s), path) { + return s + } + } + return nil +} + +// importPath returns the unquoted import path of s, +// or "" if the path is not properly quoted. +func importPath(s *ast.ImportSpec) string { + t, err := strconv.Unquote(s.Path.Value) + if err != nil { + return "" + } + return t +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/outline/outline.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/outline/outline.go new file mode 100644 index 0000000..e99d557 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/outline/outline.go @@ -0,0 +1,130 @@ +package outline + +import ( + "bytes" + "encoding/csv" + "encoding/json" + "fmt" + "go/ast" + "go/token" + "strconv" + "strings" + + "golang.org/x/tools/go/ast/inspector" +) + +const ( + // ginkgoImportPath is the well-known ginkgo import path + ginkgoImportPath = "github.com/onsi/ginkgo/v2" +) + +// FromASTFile returns an outline for a Ginkgo test source file +func FromASTFile(fset *token.FileSet, src *ast.File) (*outline, error) { + ginkgoPackageName := packageNameForImport(src, ginkgoImportPath) + if ginkgoPackageName == nil { + return nil, fmt.Errorf("file does not import %q", ginkgoImportPath) + } + + root := ginkgoNode{} + stack := []*ginkgoNode{&root} + ispr := inspector.New([]*ast.File{src}) + ispr.Nodes([]ast.Node{(*ast.CallExpr)(nil)}, func(node ast.Node, push bool) bool { + if push { + // Pre-order traversal + ce, ok := node.(*ast.CallExpr) + if !ok { + // Because `Nodes` calls this function only when the node is an + // ast.CallExpr, this should never happen + panic(fmt.Errorf("node starting at %d, ending at %d is not an *ast.CallExpr", node.Pos(), node.End())) + } + gn, ok := ginkgoNodeFromCallExpr(fset, ce, ginkgoPackageName) + if !ok { + // Node is not a Ginkgo spec or container, continue + return true + } + parent := stack[len(stack)-1] + parent.Nodes = append(parent.Nodes, gn) + stack = append(stack, gn) + return true + } + // Post-order traversal + start, end := absoluteOffsetsForNode(fset, node) + lastVisitedGinkgoNode := stack[len(stack)-1] + if start != lastVisitedGinkgoNode.Start || end != lastVisitedGinkgoNode.End { + // Node is not a Ginkgo spec or container, so it was not pushed onto the stack, continue + return true + } + stack = stack[0 : len(stack)-1] + return true + }) + if len(root.Nodes) == 0 { + return &outline{[]*ginkgoNode{}}, nil + } + + // Derive the final focused property for all nodes. This must be done + // _before_ propagating the inherited focused property. + root.BackpropagateUnfocus() + // Now, propagate inherited properties, including focused and pending. + root.PropagateInheritedProperties() + + return &outline{root.Nodes}, nil +} + +type outline struct { + Nodes []*ginkgoNode `json:"nodes"` +} + +func (o *outline) MarshalJSON() ([]byte, error) { + return json.Marshal(o.Nodes) +} + +// String returns a CSV-formatted outline. Spec or container are output in +// depth-first order. +func (o *outline) String() string { + return o.StringIndent(0) +} + +// StringIndent returns a CSV-formated outline, but every line is indented by +// one 'width' of spaces for every level of nesting. +func (o *outline) StringIndent(width int) string { + var b bytes.Buffer + b.WriteString("Name,Text,Start,End,Spec,Focused,Pending,Labels\n") + + csvWriter := csv.NewWriter(&b) + + currentIndent := 0 + pre := func(n *ginkgoNode) { + b.WriteString(fmt.Sprintf("%*s", currentIndent, "")) + var labels string + if len(n.Labels) == 1 { + labels = n.Labels[0] + } else { + labels = strings.Join(n.Labels, ", ") + } + + row := []string{ + n.Name, + n.Text, + strconv.Itoa(n.Start), + strconv.Itoa(n.End), + strconv.FormatBool(n.Spec), + strconv.FormatBool(n.Focused), + strconv.FormatBool(n.Pending), + labels, + } + csvWriter.Write(row) + + // Ensure we write to `b' before the next `b.WriteString()', which might be adding indentation + csvWriter.Flush() + + currentIndent += width + } + post := func(n *ginkgoNode) { + currentIndent -= width + } + for _, n := range o.Nodes { + n.Walk(pre, post) + } + + return b.String() +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/outline/outline_command.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/outline/outline_command.go new file mode 100644 index 0000000..36698d4 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/outline/outline_command.go @@ -0,0 +1,98 @@ +package outline + +import ( + "encoding/json" + "fmt" + "go/parser" + "go/token" + "os" + + "github.com/onsi/ginkgo/v2/ginkgo/command" + "github.com/onsi/ginkgo/v2/types" +) + +const ( + // indentWidth is the width used by the 'indent' output + indentWidth = 4 + // stdinAlias is a portable alias for stdin. This convention is used in + // other CLIs, e.g., kubectl. + stdinAlias = "-" + usageCommand = "ginkgo outline " +) + +type outlineConfig struct { + Format string +} + +func BuildOutlineCommand() command.Command { + conf := outlineConfig{ + Format: "csv", + } + flags, err := types.NewGinkgoFlagSet( + types.GinkgoFlags{ + {Name: "format", KeyPath: "Format", + Usage: "Format of outline", + UsageArgument: "one of 'csv', 'indent', or 'json'", + UsageDefaultValue: conf.Format, + }, + }, + &conf, + types.GinkgoFlagSections{}, + ) + if err != nil { + panic(err) + } + + return command.Command{ + Name: "outline", + Usage: "ginkgo outline ", + ShortDoc: "Create an outline of Ginkgo symbols for a file", + Documentation: "To read from stdin, use: `ginkgo outline -`", + DocLink: "creating-an-outline-of-specs", + Flags: flags, + Command: func(args []string, _ []string) { + outlineFile(args, conf.Format) + }, + } +} + +func outlineFile(args []string, format string) { + if len(args) != 1 { + command.AbortWithUsage("outline expects exactly one argument") + } + + filename := args[0] + var src *os.File + if filename == stdinAlias { + src = os.Stdin + } else { + var err error + src, err = os.Open(filename) + command.AbortIfError("Failed to open file:", err) + } + + fset := token.NewFileSet() + + parsedSrc, err := parser.ParseFile(fset, filename, src, 0) + command.AbortIfError("Failed to parse source:", err) + + o, err := FromASTFile(fset, parsedSrc) + command.AbortIfError("Failed to create outline:", err) + + var oerr error + switch format { + case "csv": + _, oerr = fmt.Print(o) + case "indent": + _, oerr = fmt.Print(o.StringIndent(indentWidth)) + case "json": + b, err := json.Marshal(o) + if err != nil { + println(fmt.Sprintf("error marshalling to json: %s", err)) + } + _, oerr = fmt.Println(string(b)) + default: + command.AbortWith("Format %s not accepted", format) + } + command.AbortIfError("Failed to write outline:", oerr) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/run/run_command.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/run/run_command.go new file mode 100644 index 0000000..03875b9 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/run/run_command.go @@ -0,0 +1,232 @@ +package run + +import ( + "fmt" + "os" + "strings" + "time" + + "github.com/onsi/ginkgo/v2/formatter" + "github.com/onsi/ginkgo/v2/ginkgo/command" + "github.com/onsi/ginkgo/v2/ginkgo/internal" + "github.com/onsi/ginkgo/v2/internal/interrupt_handler" + "github.com/onsi/ginkgo/v2/types" +) + +func BuildRunCommand() command.Command { + var suiteConfig = types.NewDefaultSuiteConfig() + var reporterConfig = types.NewDefaultReporterConfig() + var cliConfig = types.NewDefaultCLIConfig() + var goFlagsConfig = types.NewDefaultGoFlagsConfig() + + flags, err := types.BuildRunCommandFlagSet(&suiteConfig, &reporterConfig, &cliConfig, &goFlagsConfig) + if err != nil { + panic(err) + } + + interruptHandler := interrupt_handler.NewInterruptHandler(nil) + interrupt_handler.SwallowSigQuit() + + return command.Command{ + Name: "run", + Flags: flags, + Usage: "ginkgo run -- ", + ShortDoc: "Run the tests in the passed in (or the package in the current directory if left blank)", + Documentation: "Any arguments after -- will be passed to the test.", + DocLink: "running-tests", + Command: func(args []string, additionalArgs []string) { + var errors []error + cliConfig, goFlagsConfig, errors = types.VetAndInitializeCLIAndGoConfig(cliConfig, goFlagsConfig) + command.AbortIfErrors("Ginkgo detected configuration issues:", errors) + + runner := &SpecRunner{ + cliConfig: cliConfig, + goFlagsConfig: goFlagsConfig, + suiteConfig: suiteConfig, + reporterConfig: reporterConfig, + flags: flags, + + interruptHandler: interruptHandler, + } + + runner.RunSpecs(args, additionalArgs) + }, + } +} + +type SpecRunner struct { + suiteConfig types.SuiteConfig + reporterConfig types.ReporterConfig + cliConfig types.CLIConfig + goFlagsConfig types.GoFlagsConfig + flags types.GinkgoFlagSet + + interruptHandler *interrupt_handler.InterruptHandler +} + +func (r *SpecRunner) RunSpecs(args []string, additionalArgs []string) { + suites := internal.FindSuites(args, r.cliConfig, true) + skippedSuites := suites.WithState(internal.TestSuiteStateSkippedByFilter) + suites = suites.WithoutState(internal.TestSuiteStateSkippedByFilter) + + internal.VerifyCLIAndFrameworkVersion(suites) + + if len(skippedSuites) > 0 { + fmt.Println("Will skip:") + for _, skippedSuite := range skippedSuites { + fmt.Println(" " + skippedSuite.Path) + } + } + + if len(skippedSuites) > 0 && len(suites) == 0 { + command.AbortGracefullyWith("All tests skipped! Exiting...") + } + + if len(suites) == 0 { + command.AbortWith("Found no test suites") + } + + if len(suites) > 1 && !r.flags.WasSet("succinct") && r.reporterConfig.Verbosity().LT(types.VerbosityLevelVerbose) { + r.reporterConfig.Succinct = true + } + + t := time.Now() + var endTime time.Time + if r.suiteConfig.Timeout > 0 { + endTime = t.Add(r.suiteConfig.Timeout) + } + + iteration := 0 +OUTER_LOOP: + for { + if !r.flags.WasSet("seed") { + r.suiteConfig.RandomSeed = time.Now().Unix() + } + if r.cliConfig.RandomizeSuites && len(suites) > 1 { + suites = suites.ShuffledCopy(r.suiteConfig.RandomSeed) + } + + opc := internal.NewOrderedParallelCompiler(r.cliConfig.ComputedNumCompilers()) + opc.StartCompiling(suites, r.goFlagsConfig, false) + + SUITE_LOOP: + for { + suiteIdx, suite := opc.Next() + if suiteIdx >= len(suites) { + break SUITE_LOOP + } + suites[suiteIdx] = suite + + if r.interruptHandler.Status().Interrupted() { + opc.StopAndDrain() + break OUTER_LOOP + } + + if suites[suiteIdx].State.Is(internal.TestSuiteStateSkippedDueToEmptyCompilation) { + fmt.Printf("Skipping %s (no test files)\n", suite.Path) + continue SUITE_LOOP + } + + if suites[suiteIdx].State.Is(internal.TestSuiteStateFailedToCompile) { + fmt.Println(suites[suiteIdx].CompilationError.Error()) + if !r.cliConfig.KeepGoing { + opc.StopAndDrain() + } + continue SUITE_LOOP + } + + if suites.CountWithState(internal.TestSuiteStateFailureStates...) > 0 && !r.cliConfig.KeepGoing { + suites[suiteIdx].State = internal.TestSuiteStateSkippedDueToPriorFailures + opc.StopAndDrain() + continue SUITE_LOOP + } + + if !endTime.IsZero() { + r.suiteConfig.Timeout = time.Until(endTime) + if r.suiteConfig.Timeout <= 0 { + suites[suiteIdx].State = internal.TestSuiteStateFailedDueToTimeout + opc.StopAndDrain() + continue SUITE_LOOP + } + } + + suites[suiteIdx] = internal.RunCompiledSuite(suites[suiteIdx], r.suiteConfig, r.reporterConfig, r.cliConfig, r.goFlagsConfig, additionalArgs) + } + + if suites.CountWithState(internal.TestSuiteStateFailureStates...) > 0 { + if iteration > 0 { + fmt.Printf("\nTests failed on attempt #%d\n\n", iteration+1) + } + break OUTER_LOOP + } + + if r.cliConfig.UntilItFails { + fmt.Printf("\nAll tests passed...\nWill keep running them until they fail.\nThis was attempt #%d\n%s\n", iteration+1, orcMessage(iteration+1)) + } else if r.cliConfig.Repeat > 0 && iteration < r.cliConfig.Repeat { + fmt.Printf("\nAll tests passed...\nThis was attempt %d of %d.\n", iteration+1, r.cliConfig.Repeat+1) + } else { + break OUTER_LOOP + } + iteration += 1 + } + + internal.Cleanup(r.goFlagsConfig, suites...) + + messages, err := internal.FinalizeProfilesAndReportsForSuites(suites, r.cliConfig, r.suiteConfig, r.reporterConfig, r.goFlagsConfig) + command.AbortIfError("could not finalize profiles:", err) + for _, message := range messages { + fmt.Println(message) + } + + fmt.Printf("\nGinkgo ran %d %s in %s\n", len(suites), internal.PluralizedWord("suite", "suites", len(suites)), time.Since(t)) + + if suites.CountWithState(internal.TestSuiteStateFailureStates...) == 0 { + if suites.AnyHaveProgrammaticFocus() && strings.TrimSpace(os.Getenv("GINKGO_EDITOR_INTEGRATION")) == "" { + fmt.Printf("Test Suite Passed\n") + fmt.Printf("Detected Programmatic Focus - setting exit status to %d\n", types.GINKGO_FOCUS_EXIT_CODE) + command.Abort(command.AbortDetails{ExitCode: types.GINKGO_FOCUS_EXIT_CODE}) + } else { + fmt.Printf("Test Suite Passed\n") + command.Abort(command.AbortDetails{}) + } + } else { + fmt.Fprintln(formatter.ColorableStdOut, "") + if len(suites) > 1 && suites.CountWithState(internal.TestSuiteStateFailureStates...) > 0 { + fmt.Fprintln(formatter.ColorableStdOut, + internal.FailedSuitesReport(suites, formatter.NewWithNoColorBool(r.reporterConfig.NoColor))) + } + fmt.Printf("Test Suite Failed\n") + command.Abort(command.AbortDetails{ExitCode: 1}) + } +} + +func orcMessage(iteration int) string { + if iteration < 10 { + return "" + } else if iteration < 30 { + return []string{ + "If at first you succeed...", + "...try, try again.", + "Looking good!", + "Still good...", + "I think your tests are fine....", + "Yep, still passing", + "Oh boy, here I go testin' again!", + "Even the gophers are getting bored", + "Did you try -race?", + "Maybe you should stop now?", + "I'm getting tired...", + "What if I just made you a sandwich?", + "Hit ^C, hit ^C, please hit ^C", + "Make it stop. Please!", + "Come on! Enough is enough!", + "Dave, this conversation can serve no purpose anymore. Goodbye.", + "Just what do you think you're doing, Dave? ", + "I, Sisyphus", + "Insanity: doing the same thing over and over again and expecting different results. -Einstein", + "I guess Einstein never tried to churn butter", + }[iteration-10] + "\n" + } else { + return "No, seriously... you can probably stop now.\n" + } +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/unfocus/unfocus_command.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/unfocus/unfocus_command.go new file mode 100644 index 0000000..7dd2943 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/unfocus/unfocus_command.go @@ -0,0 +1,186 @@ +package unfocus + +import ( + "bytes" + "fmt" + "go/ast" + "go/parser" + "go/token" + "io" + "os" + "path/filepath" + "strings" + "sync" + + "github.com/onsi/ginkgo/v2/ginkgo/command" +) + +func BuildUnfocusCommand() command.Command { + return command.Command{ + Name: "unfocus", + Usage: "ginkgo unfocus", + ShortDoc: "Recursively unfocus any focused tests under the current directory", + DocLink: "filtering-specs", + Command: func(_ []string, _ []string) { + unfocusSpecs() + }, + } +} + +func unfocusSpecs() { + fmt.Println("Scanning for focus...") + + goFiles := make(chan string) + go func() { + unfocusDir(goFiles, ".") + close(goFiles) + }() + + const workers = 10 + wg := sync.WaitGroup{} + wg.Add(workers) + + for i := 0; i < workers; i++ { + go func() { + for path := range goFiles { + unfocusFile(path) + } + wg.Done() + }() + } + + wg.Wait() +} + +func unfocusDir(goFiles chan string, path string) { + files, err := os.ReadDir(path) + if err != nil { + fmt.Println(err.Error()) + return + } + + for _, f := range files { + switch { + case f.IsDir() && shouldProcessDir(f.Name()): + unfocusDir(goFiles, filepath.Join(path, f.Name())) + case !f.IsDir() && shouldProcessFile(f.Name()): + goFiles <- filepath.Join(path, f.Name()) + } + } +} + +func shouldProcessDir(basename string) bool { + return basename != "vendor" && !strings.HasPrefix(basename, ".") +} + +func shouldProcessFile(basename string) bool { + return strings.HasSuffix(basename, ".go") +} + +func unfocusFile(path string) { + data, err := os.ReadFile(path) + if err != nil { + fmt.Printf("error reading file '%s': %s\n", path, err.Error()) + return + } + + ast, err := parser.ParseFile(token.NewFileSet(), path, bytes.NewReader(data), parser.ParseComments) + if err != nil { + fmt.Printf("error parsing file '%s': %s\n", path, err.Error()) + return + } + + eliminations := scanForFocus(ast) + if len(eliminations) == 0 { + return + } + + fmt.Printf("...updating %s\n", path) + backup, err := writeBackup(path, data) + if err != nil { + fmt.Printf("error creating backup file: %s\n", err.Error()) + return + } + + if err := updateFile(path, data, eliminations); err != nil { + fmt.Printf("error writing file '%s': %s\n", path, err.Error()) + return + } + + os.Remove(backup) +} + +func writeBackup(path string, data []byte) (string, error) { + t, err := os.CreateTemp(filepath.Dir(path), filepath.Base(path)) + + if err != nil { + return "", fmt.Errorf("error creating temporary file: %w", err) + } + defer t.Close() + + if _, err := io.Copy(t, bytes.NewReader(data)); err != nil { + return "", fmt.Errorf("error writing to temporary file: %w", err) + } + + return t.Name(), nil +} + +func updateFile(path string, data []byte, eliminations [][]int64) error { + to, err := os.Create(path) + if err != nil { + return fmt.Errorf("error opening file for writing '%s': %w\n", path, err) + } + defer to.Close() + + from := bytes.NewReader(data) + var cursor int64 + for _, eliminationRange := range eliminations { + positionToEliminate, lengthToEliminate := eliminationRange[0]-1, eliminationRange[1] + if _, err := io.CopyN(to, from, positionToEliminate-cursor); err != nil { + return fmt.Errorf("error copying data: %w", err) + } + + cursor = positionToEliminate + lengthToEliminate + + if _, err := from.Seek(lengthToEliminate, io.SeekCurrent); err != nil { + return fmt.Errorf("error seeking to position in buffer: %w", err) + } + } + + if _, err := io.Copy(to, from); err != nil { + return fmt.Errorf("error copying end data: %w", err) + } + + return nil +} + +func scanForFocus(file *ast.File) (eliminations [][]int64) { + ast.Inspect(file, func(n ast.Node) bool { + if c, ok := n.(*ast.CallExpr); ok { + if i, ok := c.Fun.(*ast.Ident); ok { + if isFocus(i.Name) { + eliminations = append(eliminations, []int64{int64(i.Pos()), 1}) + } + } + } + + if i, ok := n.(*ast.Ident); ok { + if i.Name == "Focus" { + eliminations = append(eliminations, []int64{int64(i.Pos()), 6}) + } + } + + return true + }) + + return eliminations +} + +func isFocus(name string) bool { + switch name { + case "FDescribe", "FContext", "FIt", "FDescribeTable", "FEntry", "FSpecify", "FWhen": + return true + default: + return false + } +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/delta.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/delta.go new file mode 100644 index 0000000..6c485c5 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/delta.go @@ -0,0 +1,22 @@ +package watch + +import "sort" + +type Delta struct { + ModifiedPackages []string + + NewSuites []*Suite + RemovedSuites []*Suite + modifiedSuites []*Suite +} + +type DescendingByDelta []*Suite + +func (a DescendingByDelta) Len() int { return len(a) } +func (a DescendingByDelta) Swap(i, j int) { a[i], a[j] = a[j], a[i] } +func (a DescendingByDelta) Less(i, j int) bool { return a[i].Delta() > a[j].Delta() } + +func (d Delta) ModifiedSuites() []*Suite { + sort.Sort(DescendingByDelta(d.modifiedSuites)) + return d.modifiedSuites +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/delta_tracker.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/delta_tracker.go new file mode 100644 index 0000000..26418ac --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/delta_tracker.go @@ -0,0 +1,75 @@ +package watch + +import ( + "fmt" + + "regexp" + + "github.com/onsi/ginkgo/v2/ginkgo/internal" +) + +type SuiteErrors map[internal.TestSuite]error + +type DeltaTracker struct { + maxDepth int + watchRegExp *regexp.Regexp + suites map[string]*Suite + packageHashes *PackageHashes +} + +func NewDeltaTracker(maxDepth int, watchRegExp *regexp.Regexp) *DeltaTracker { + return &DeltaTracker{ + maxDepth: maxDepth, + watchRegExp: watchRegExp, + packageHashes: NewPackageHashes(watchRegExp), + suites: map[string]*Suite{}, + } +} + +func (d *DeltaTracker) Delta(suites internal.TestSuites) (delta Delta, errors SuiteErrors) { + errors = SuiteErrors{} + delta.ModifiedPackages = d.packageHashes.CheckForChanges() + + providedSuitePaths := map[string]bool{} + for _, suite := range suites { + providedSuitePaths[suite.Path] = true + } + + d.packageHashes.StartTrackingUsage() + + for _, suite := range d.suites { + if providedSuitePaths[suite.Suite.Path] { + if suite.Delta() > 0 { + delta.modifiedSuites = append(delta.modifiedSuites, suite) + } + } else { + delta.RemovedSuites = append(delta.RemovedSuites, suite) + } + } + + d.packageHashes.StopTrackingUsageAndPrune() + + for _, suite := range suites { + _, ok := d.suites[suite.Path] + if !ok { + s, err := NewSuite(suite, d.maxDepth, d.packageHashes) + if err != nil { + errors[suite] = err + continue + } + d.suites[suite.Path] = s + delta.NewSuites = append(delta.NewSuites, s) + } + } + + return delta, errors +} + +func (d *DeltaTracker) WillRun(suite internal.TestSuite) error { + s, ok := d.suites[suite.Path] + if !ok { + return fmt.Errorf("unknown suite %s", suite.Path) + } + + return s.MarkAsRunAndRecomputedDependencies(d.maxDepth) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/dependencies.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/dependencies.go new file mode 100644 index 0000000..75cbdb4 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/dependencies.go @@ -0,0 +1,97 @@ +package watch + +import ( + "go/build" + "strings" +) + +type Dependencies struct { + deps map[string]int +} + +func NewDependencies(path string, maxDepth int) (Dependencies, error) { + d := Dependencies{ + deps: map[string]int{}, + } + + if maxDepth == 0 { + return d, nil + } + + err := d.seedWithDepsForPackageAtPath(path) + if err != nil { + return d, err + } + + for depth := 1; depth < maxDepth; depth++ { + n := len(d.deps) + d.addDepsForDepth(depth) + if n == len(d.deps) { + break + } + } + + return d, nil +} + +func (d Dependencies) Dependencies() map[string]int { + return d.deps +} + +func (d Dependencies) seedWithDepsForPackageAtPath(path string) error { + pkg, err := build.ImportDir(path, 0) + if err != nil { + return err + } + + d.resolveAndAdd(pkg.Imports, 1) + d.resolveAndAdd(pkg.TestImports, 1) + d.resolveAndAdd(pkg.XTestImports, 1) + + delete(d.deps, pkg.Dir) + return nil +} + +func (d Dependencies) addDepsForDepth(depth int) { + for dep, depDepth := range d.deps { + if depDepth == depth { + d.addDepsForDep(dep, depth+1) + } + } +} + +func (d Dependencies) addDepsForDep(dep string, depth int) { + pkg, err := build.ImportDir(dep, 0) + if err != nil { + println(err.Error()) + return + } + d.resolveAndAdd(pkg.Imports, depth) +} + +func (d Dependencies) resolveAndAdd(deps []string, depth int) { + for _, dep := range deps { + pkg, err := build.Import(dep, ".", 0) + if err != nil { + continue + } + if !pkg.Goroot && (!matchesGinkgoOrGomega(pkg.Dir) || matchesGinkgoIntegration(pkg.Dir)) { + d.addDepIfNotPresent(pkg.Dir, depth) + } + } +} + +func (d Dependencies) addDepIfNotPresent(dep string, depth int) { + _, ok := d.deps[dep] + if !ok { + d.deps[dep] = depth + } +} + +func matchesGinkgoOrGomega(s string) bool { + return strings.Contains(s, "github.com/onsi/ginkgo") || strings.Contains(s, "github.com/onsi/gomega") +} + +func matchesGinkgoIntegration(s string) bool { + return strings.Contains(s, "github.com/onsi/ginkgo/integration") // allow us to integration test this thing +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/package_hash.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/package_hash.go new file mode 100644 index 0000000..0e6ae1f --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/package_hash.go @@ -0,0 +1,117 @@ +package watch + +import ( + "fmt" + "os" + "regexp" + "strings" + "time" +) + +var goTestRegExp = regexp.MustCompile(`_test\.go$`) + +type PackageHash struct { + CodeModifiedTime time.Time + TestModifiedTime time.Time + Deleted bool + + path string + codeHash string + testHash string + watchRegExp *regexp.Regexp +} + +func NewPackageHash(path string, watchRegExp *regexp.Regexp) *PackageHash { + p := &PackageHash{ + path: path, + watchRegExp: watchRegExp, + } + + p.codeHash, _, p.testHash, _, p.Deleted = p.computeHashes() + + return p +} + +func (p *PackageHash) CheckForChanges() bool { + codeHash, codeModifiedTime, testHash, testModifiedTime, deleted := p.computeHashes() + + if deleted { + if !p.Deleted { + t := time.Now() + p.CodeModifiedTime = t + p.TestModifiedTime = t + } + p.Deleted = true + return true + } + + modified := false + p.Deleted = false + + if p.codeHash != codeHash { + p.CodeModifiedTime = codeModifiedTime + modified = true + } + if p.testHash != testHash { + p.TestModifiedTime = testModifiedTime + modified = true + } + + p.codeHash = codeHash + p.testHash = testHash + return modified +} + +func (p *PackageHash) computeHashes() (codeHash string, codeModifiedTime time.Time, testHash string, testModifiedTime time.Time, deleted bool) { + entries, err := os.ReadDir(p.path) + + if err != nil { + deleted = true + return + } + + for _, entry := range entries { + if entry.IsDir() { + continue + } + + info, err := entry.Info() + if err != nil { + continue + } + + if isHiddenFile(info) { + continue + } + + if goTestRegExp.MatchString(info.Name()) { + testHash += p.hashForFileInfo(info) + if info.ModTime().After(testModifiedTime) { + testModifiedTime = info.ModTime() + } + continue + } + + if p.watchRegExp.MatchString(info.Name()) { + codeHash += p.hashForFileInfo(info) + if info.ModTime().After(codeModifiedTime) { + codeModifiedTime = info.ModTime() + } + } + } + + testHash += codeHash + if codeModifiedTime.After(testModifiedTime) { + testModifiedTime = codeModifiedTime + } + + return +} + +func isHiddenFile(info os.FileInfo) bool { + return strings.HasPrefix(info.Name(), ".") || strings.HasPrefix(info.Name(), "_") +} + +func (p *PackageHash) hashForFileInfo(info os.FileInfo) string { + return fmt.Sprintf("%s_%d_%d", info.Name(), info.Size(), info.ModTime().UnixNano()) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/package_hashes.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/package_hashes.go new file mode 100644 index 0000000..b4892be --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/package_hashes.go @@ -0,0 +1,85 @@ +package watch + +import ( + "path/filepath" + "regexp" + "sync" +) + +type PackageHashes struct { + PackageHashes map[string]*PackageHash + usedPaths map[string]bool + watchRegExp *regexp.Regexp + lock *sync.Mutex +} + +func NewPackageHashes(watchRegExp *regexp.Regexp) *PackageHashes { + return &PackageHashes{ + PackageHashes: map[string]*PackageHash{}, + usedPaths: nil, + watchRegExp: watchRegExp, + lock: &sync.Mutex{}, + } +} + +func (p *PackageHashes) CheckForChanges() []string { + p.lock.Lock() + defer p.lock.Unlock() + + modified := []string{} + + for _, packageHash := range p.PackageHashes { + if packageHash.CheckForChanges() { + modified = append(modified, packageHash.path) + } + } + + return modified +} + +func (p *PackageHashes) Add(path string) *PackageHash { + p.lock.Lock() + defer p.lock.Unlock() + + path, _ = filepath.Abs(path) + _, ok := p.PackageHashes[path] + if !ok { + p.PackageHashes[path] = NewPackageHash(path, p.watchRegExp) + } + + if p.usedPaths != nil { + p.usedPaths[path] = true + } + return p.PackageHashes[path] +} + +func (p *PackageHashes) Get(path string) *PackageHash { + p.lock.Lock() + defer p.lock.Unlock() + + path, _ = filepath.Abs(path) + if p.usedPaths != nil { + p.usedPaths[path] = true + } + return p.PackageHashes[path] +} + +func (p *PackageHashes) StartTrackingUsage() { + p.lock.Lock() + defer p.lock.Unlock() + + p.usedPaths = map[string]bool{} +} + +func (p *PackageHashes) StopTrackingUsageAndPrune() { + p.lock.Lock() + defer p.lock.Unlock() + + for path := range p.PackageHashes { + if !p.usedPaths[path] { + delete(p.PackageHashes, path) + } + } + + p.usedPaths = nil +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/suite.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/suite.go new file mode 100644 index 0000000..53272df --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/suite.go @@ -0,0 +1,87 @@ +package watch + +import ( + "fmt" + "math" + "time" + + "github.com/onsi/ginkgo/v2/ginkgo/internal" +) + +type Suite struct { + Suite internal.TestSuite + RunTime time.Time + Dependencies Dependencies + + sharedPackageHashes *PackageHashes +} + +func NewSuite(suite internal.TestSuite, maxDepth int, sharedPackageHashes *PackageHashes) (*Suite, error) { + deps, err := NewDependencies(suite.Path, maxDepth) + if err != nil { + return nil, err + } + + sharedPackageHashes.Add(suite.Path) + for dep := range deps.Dependencies() { + sharedPackageHashes.Add(dep) + } + + return &Suite{ + Suite: suite, + Dependencies: deps, + + sharedPackageHashes: sharedPackageHashes, + }, nil +} + +func (s *Suite) Delta() float64 { + delta := s.delta(s.Suite.Path, true, 0) * 1000 + for dep, depth := range s.Dependencies.Dependencies() { + delta += s.delta(dep, false, depth) + } + return delta +} + +func (s *Suite) MarkAsRunAndRecomputedDependencies(maxDepth int) error { + s.RunTime = time.Now() + + deps, err := NewDependencies(s.Suite.Path, maxDepth) + if err != nil { + return err + } + + s.sharedPackageHashes.Add(s.Suite.Path) + for dep := range deps.Dependencies() { + s.sharedPackageHashes.Add(dep) + } + + s.Dependencies = deps + + return nil +} + +func (s *Suite) Description() string { + numDeps := len(s.Dependencies.Dependencies()) + pluralizer := "ies" + if numDeps == 1 { + pluralizer = "y" + } + return fmt.Sprintf("%s [%d dependenc%s]", s.Suite.Path, numDeps, pluralizer) +} + +func (s *Suite) delta(packagePath string, includeTests bool, depth int) float64 { + return math.Max(float64(s.dt(packagePath, includeTests)), 0) / float64(depth+1) +} + +func (s *Suite) dt(packagePath string, includeTests bool) time.Duration { + packageHash := s.sharedPackageHashes.Get(packagePath) + var modifiedTime time.Time + if includeTests { + modifiedTime = packageHash.TestModifiedTime + } else { + modifiedTime = packageHash.CodeModifiedTime + } + + return modifiedTime.Sub(s.RunTime) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/watch_command.go b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/watch_command.go new file mode 100644 index 0000000..fe1ca30 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/ginkgo/watch/watch_command.go @@ -0,0 +1,192 @@ +package watch + +import ( + "fmt" + "regexp" + "time" + + "github.com/onsi/ginkgo/v2/formatter" + "github.com/onsi/ginkgo/v2/ginkgo/command" + "github.com/onsi/ginkgo/v2/ginkgo/internal" + "github.com/onsi/ginkgo/v2/internal/interrupt_handler" + "github.com/onsi/ginkgo/v2/types" +) + +func BuildWatchCommand() command.Command { + var suiteConfig = types.NewDefaultSuiteConfig() + var reporterConfig = types.NewDefaultReporterConfig() + var cliConfig = types.NewDefaultCLIConfig() + var goFlagsConfig = types.NewDefaultGoFlagsConfig() + + flags, err := types.BuildWatchCommandFlagSet(&suiteConfig, &reporterConfig, &cliConfig, &goFlagsConfig) + if err != nil { + panic(err) + } + interruptHandler := interrupt_handler.NewInterruptHandler(nil) + interrupt_handler.SwallowSigQuit() + + return command.Command{ + Name: "watch", + Flags: flags, + Usage: "ginkgo watch -- ", + ShortDoc: "Watch the passed in and runs their tests whenever changes occur.", + Documentation: "Any arguments after -- will be passed to the test.", + DocLink: "watching-for-changes", + Command: func(args []string, additionalArgs []string) { + var errors []error + cliConfig, goFlagsConfig, errors = types.VetAndInitializeCLIAndGoConfig(cliConfig, goFlagsConfig) + command.AbortIfErrors("Ginkgo detected configuration issues:", errors) + + watcher := &SpecWatcher{ + cliConfig: cliConfig, + goFlagsConfig: goFlagsConfig, + suiteConfig: suiteConfig, + reporterConfig: reporterConfig, + flags: flags, + + interruptHandler: interruptHandler, + } + + watcher.WatchSpecs(args, additionalArgs) + }, + } +} + +type SpecWatcher struct { + suiteConfig types.SuiteConfig + reporterConfig types.ReporterConfig + cliConfig types.CLIConfig + goFlagsConfig types.GoFlagsConfig + flags types.GinkgoFlagSet + + interruptHandler *interrupt_handler.InterruptHandler +} + +func (w *SpecWatcher) WatchSpecs(args []string, additionalArgs []string) { + suites := internal.FindSuites(args, w.cliConfig, false).WithoutState(internal.TestSuiteStateSkippedByFilter) + + internal.VerifyCLIAndFrameworkVersion(suites) + + if len(suites) == 0 { + command.AbortWith("Found no test suites") + } + + fmt.Printf("Identified %d test %s. Locating dependencies to a depth of %d (this may take a while)...\n", len(suites), internal.PluralizedWord("suite", "suites", len(suites)), w.cliConfig.Depth) + deltaTracker := NewDeltaTracker(w.cliConfig.Depth, regexp.MustCompile(w.cliConfig.WatchRegExp)) + delta, errors := deltaTracker.Delta(suites) + + fmt.Printf("Watching %d %s:\n", len(delta.NewSuites), internal.PluralizedWord("suite", "suites", len(delta.NewSuites))) + for _, suite := range delta.NewSuites { + fmt.Println(" " + suite.Description()) + } + + for suite, err := range errors { + fmt.Printf("Failed to watch %s: %s\n", suite.PackageName, err) + } + + if len(suites) == 1 { + w.updateSeed() + w.compileAndRun(suites[0], additionalArgs) + } + + ticker := time.NewTicker(time.Second) + + for { + select { + case <-ticker.C: + suites := internal.FindSuites(args, w.cliConfig, false).WithoutState(internal.TestSuiteStateSkippedByFilter) + delta, _ := deltaTracker.Delta(suites) + coloredStream := formatter.ColorableStdOut + + suites = internal.TestSuites{} + + if len(delta.NewSuites) > 0 { + fmt.Fprintln(coloredStream, formatter.F("{{green}}Detected %d new %s:{{/}}", len(delta.NewSuites), internal.PluralizedWord("suite", "suites", len(delta.NewSuites)))) + for _, suite := range delta.NewSuites { + suites = append(suites, suite.Suite) + fmt.Fprintln(coloredStream, formatter.Fi(1, "%s", suite.Description())) + } + } + + modifiedSuites := delta.ModifiedSuites() + if len(modifiedSuites) > 0 { + fmt.Fprintln(coloredStream, formatter.F("{{green}}Detected changes in:{{/}}")) + for _, pkg := range delta.ModifiedPackages { + fmt.Fprintln(coloredStream, formatter.Fi(1, "%s", pkg)) + } + fmt.Fprintln(coloredStream, formatter.F("{{green}}Will run %d %s:{{/}}", len(modifiedSuites), internal.PluralizedWord("suite", "suites", len(modifiedSuites)))) + for _, suite := range modifiedSuites { + suites = append(suites, suite.Suite) + fmt.Fprintln(coloredStream, formatter.Fi(1, "%s", suite.Description())) + } + fmt.Fprintln(coloredStream, "") + } + + if len(suites) == 0 { + break + } + + w.updateSeed() + w.computeSuccinctMode(len(suites)) + for idx := range suites { + if w.interruptHandler.Status().Interrupted() { + return + } + deltaTracker.WillRun(suites[idx]) + suites[idx] = w.compileAndRun(suites[idx], additionalArgs) + } + color := "{{green}}" + if suites.CountWithState(internal.TestSuiteStateFailureStates...) > 0 { + color = "{{red}}" + } + fmt.Fprintln(coloredStream, formatter.F(color+"\nDone. Resuming watch...{{/}}")) + + messages, err := internal.FinalizeProfilesAndReportsForSuites(suites, w.cliConfig, w.suiteConfig, w.reporterConfig, w.goFlagsConfig) + command.AbortIfError("could not finalize profiles:", err) + for _, message := range messages { + fmt.Println(message) + } + case <-w.interruptHandler.Status().Channel: + return + } + } +} + +func (w *SpecWatcher) compileAndRun(suite internal.TestSuite, additionalArgs []string) internal.TestSuite { + suite = internal.CompileSuite(suite, w.goFlagsConfig, false) + if suite.State.Is(internal.TestSuiteStateFailedToCompile) { + fmt.Println(suite.CompilationError.Error()) + return suite + } + if w.interruptHandler.Status().Interrupted() { + return suite + } + suite = internal.RunCompiledSuite(suite, w.suiteConfig, w.reporterConfig, w.cliConfig, w.goFlagsConfig, additionalArgs) + internal.Cleanup(w.goFlagsConfig, suite) + return suite +} + +func (w *SpecWatcher) computeSuccinctMode(numSuites int) { + if w.reporterConfig.Verbosity().GTE(types.VerbosityLevelVerbose) { + w.reporterConfig.Succinct = false + return + } + + if w.flags.WasSet("succinct") { + return + } + + if numSuites == 1 { + w.reporterConfig.Succinct = false + } + + if numSuites > 1 { + w.reporterConfig.Succinct = true + } +} + +func (w *SpecWatcher) updateSeed() { + if !w.flags.WasSet("seed") { + w.suiteConfig.RandomSeed = time.Now().Unix() + } +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/internal/interrupt_handler/interrupt_handler.go b/backend/vendor/github.com/onsi/ginkgo/v2/internal/interrupt_handler/interrupt_handler.go new file mode 100644 index 0000000..79bfa87 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/internal/interrupt_handler/interrupt_handler.go @@ -0,0 +1,177 @@ +package interrupt_handler + +import ( + "os" + "os/signal" + "sync" + "syscall" + "time" + + "github.com/onsi/ginkgo/v2/internal/parallel_support" +) + +var ABORT_POLLING_INTERVAL = 500 * time.Millisecond + +type InterruptCause uint + +const ( + InterruptCauseInvalid InterruptCause = iota + InterruptCauseSignal + InterruptCauseAbortByOtherProcess +) + +type InterruptLevel uint + +const ( + InterruptLevelUninterrupted InterruptLevel = iota + InterruptLevelCleanupAndReport + InterruptLevelReportOnly + InterruptLevelBailOut +) + +func (ic InterruptCause) String() string { + switch ic { + case InterruptCauseSignal: + return "Interrupted by User" + case InterruptCauseAbortByOtherProcess: + return "Interrupted by Other Ginkgo Process" + } + return "INVALID_INTERRUPT_CAUSE" +} + +type InterruptStatus struct { + Channel chan any + Level InterruptLevel + Cause InterruptCause +} + +func (s InterruptStatus) Interrupted() bool { + return s.Level != InterruptLevelUninterrupted +} + +func (s InterruptStatus) Message() string { + return s.Cause.String() +} + +func (s InterruptStatus) ShouldIncludeProgressReport() bool { + return s.Cause != InterruptCauseAbortByOtherProcess +} + +type InterruptHandlerInterface interface { + Status() InterruptStatus +} + +type InterruptHandler struct { + c chan any + lock *sync.Mutex + level InterruptLevel + cause InterruptCause + client parallel_support.Client + stop chan any + signals []os.Signal + requestAbortCheck chan any +} + +func NewInterruptHandler(client parallel_support.Client, signals ...os.Signal) *InterruptHandler { + if len(signals) == 0 { + signals = []os.Signal{os.Interrupt, syscall.SIGTERM} + } + handler := &InterruptHandler{ + c: make(chan any), + lock: &sync.Mutex{}, + stop: make(chan any), + requestAbortCheck: make(chan any), + client: client, + signals: signals, + } + handler.registerForInterrupts() + return handler +} + +func (handler *InterruptHandler) Stop() { + close(handler.stop) +} + +func (handler *InterruptHandler) registerForInterrupts() { + // os signal handling + signalChannel := make(chan os.Signal, 1) + signal.Notify(signalChannel, handler.signals...) + + // cross-process abort handling + var abortChannel chan any + if handler.client != nil { + abortChannel = make(chan any) + go func() { + pollTicker := time.NewTicker(ABORT_POLLING_INTERVAL) + for { + select { + case <-pollTicker.C: + if handler.client.ShouldAbort() { + close(abortChannel) + pollTicker.Stop() + return + } + case <-handler.requestAbortCheck: + if handler.client.ShouldAbort() { + close(abortChannel) + pollTicker.Stop() + return + } + case <-handler.stop: + pollTicker.Stop() + return + } + } + }() + } + + go func(abortChannel chan any) { + var interruptCause InterruptCause + for { + select { + case <-signalChannel: + interruptCause = InterruptCauseSignal + case <-abortChannel: + interruptCause = InterruptCauseAbortByOtherProcess + case <-handler.stop: + signal.Stop(signalChannel) + return + } + abortChannel = nil + + handler.lock.Lock() + oldLevel := handler.level + handler.cause = interruptCause + if handler.level == InterruptLevelUninterrupted { + handler.level = InterruptLevelCleanupAndReport + } else if handler.level == InterruptLevelCleanupAndReport { + handler.level = InterruptLevelReportOnly + } else if handler.level == InterruptLevelReportOnly { + handler.level = InterruptLevelBailOut + } + if handler.level != oldLevel { + close(handler.c) + handler.c = make(chan any) + } + handler.lock.Unlock() + } + }(abortChannel) +} + +func (handler *InterruptHandler) Status() InterruptStatus { + handler.lock.Lock() + status := InterruptStatus{ + Level: handler.level, + Channel: handler.c, + Cause: handler.cause, + } + handler.lock.Unlock() + + if handler.client != nil && handler.client.ShouldAbort() && !status.Interrupted() { + close(handler.requestAbortCheck) + <-status.Channel + return handler.Status() + } + + return status +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/internal/interrupt_handler/sigquit_swallower_unix.go b/backend/vendor/github.com/onsi/ginkgo/v2/internal/interrupt_handler/sigquit_swallower_unix.go new file mode 100644 index 0000000..bf0de49 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/internal/interrupt_handler/sigquit_swallower_unix.go @@ -0,0 +1,15 @@ +//go:build freebsd || openbsd || netbsd || dragonfly || darwin || linux || solaris +// +build freebsd openbsd netbsd dragonfly darwin linux solaris + +package interrupt_handler + +import ( + "os" + "os/signal" + "syscall" +) + +func SwallowSigQuit() { + c := make(chan os.Signal, 1024) + signal.Notify(c, syscall.SIGQUIT) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/internal/interrupt_handler/sigquit_swallower_windows.go b/backend/vendor/github.com/onsi/ginkgo/v2/internal/interrupt_handler/sigquit_swallower_windows.go new file mode 100644 index 0000000..fcf8da8 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/internal/interrupt_handler/sigquit_swallower_windows.go @@ -0,0 +1,8 @@ +//go:build windows +// +build windows + +package interrupt_handler + +func SwallowSigQuit() { + //noop +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/client_server.go b/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/client_server.go new file mode 100644 index 0000000..4234d80 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/client_server.go @@ -0,0 +1,72 @@ +package parallel_support + +import ( + "fmt" + "io" + "os" + "time" + + "github.com/onsi/ginkgo/v2/reporters" + "github.com/onsi/ginkgo/v2/types" +) + +type BeforeSuiteState struct { + Data []byte + State types.SpecState +} + +type ParallelIndexCounter struct { + Index int +} + +var ErrorGone = fmt.Errorf("gone") +var ErrorFailed = fmt.Errorf("failed") +var ErrorEarly = fmt.Errorf("early") + +var POLLING_INTERVAL = 50 * time.Millisecond + +type Server interface { + Start() + Close() + Address() string + RegisterAlive(node int, alive func() bool) + GetSuiteDone() chan any + GetOutputDestination() io.Writer + SetOutputDestination(io.Writer) +} + +type Client interface { + Connect() bool + Close() error + + PostSuiteWillBegin(report types.Report) error + PostDidRun(report types.SpecReport) error + PostSuiteDidEnd(report types.Report) error + PostReportBeforeSuiteCompleted(state types.SpecState) error + BlockUntilReportBeforeSuiteCompleted() (types.SpecState, error) + PostSynchronizedBeforeSuiteCompleted(state types.SpecState, data []byte) error + BlockUntilSynchronizedBeforeSuiteData() (types.SpecState, []byte, error) + BlockUntilNonprimaryProcsHaveFinished() error + BlockUntilAggregatedNonprimaryProcsReport() (types.Report, error) + FetchNextCounter() (int, error) + PostAbort() error + ShouldAbort() bool + PostEmitProgressReport(report types.ProgressReport) error + Write(p []byte) (int, error) +} + +func NewServer(parallelTotal int, reporter reporters.Reporter) (Server, error) { + if os.Getenv("GINKGO_PARALLEL_PROTOCOL") == "HTTP" { + return newHttpServer(parallelTotal, reporter) + } else { + return newRPCServer(parallelTotal, reporter) + } +} + +func NewClient(serverHost string) Client { + if os.Getenv("GINKGO_PARALLEL_PROTOCOL") == "HTTP" { + return newHttpClient(serverHost) + } else { + return newRPCClient(serverHost) + } +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/http_client.go b/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/http_client.go new file mode 100644 index 0000000..4aa10ae --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/http_client.go @@ -0,0 +1,166 @@ +package parallel_support + +import ( + "bytes" + "encoding/json" + "fmt" + "io" + "net/http" + "time" + + "github.com/onsi/ginkgo/v2/types" +) + +type httpClient struct { + serverHost string +} + +func newHttpClient(serverHost string) *httpClient { + return &httpClient{ + serverHost: serverHost, + } +} + +func (client *httpClient) Connect() bool { + resp, err := http.Get(client.serverHost + "/up") + if err != nil { + return false + } + resp.Body.Close() + return resp.StatusCode == http.StatusOK +} + +func (client *httpClient) Close() error { + return nil +} + +func (client *httpClient) post(path string, data any) error { + var body io.Reader + if data != nil { + encoded, err := json.Marshal(data) + if err != nil { + return err + } + body = bytes.NewBuffer(encoded) + } + resp, err := http.Post(client.serverHost+path, "application/json", body) + if err != nil { + return err + } + defer resp.Body.Close() + if resp.StatusCode != http.StatusOK { + return fmt.Errorf("received unexpected status code %d", resp.StatusCode) + } + return nil +} + +func (client *httpClient) poll(path string, data any) error { + for { + resp, err := http.Get(client.serverHost + path) + if err != nil { + return err + } + if resp.StatusCode == http.StatusTooEarly { + resp.Body.Close() + time.Sleep(POLLING_INTERVAL) + continue + } + defer resp.Body.Close() + if resp.StatusCode == http.StatusGone { + return ErrorGone + } + if resp.StatusCode == http.StatusFailedDependency { + return ErrorFailed + } + if resp.StatusCode != http.StatusOK { + return fmt.Errorf("received unexpected status code %d", resp.StatusCode) + } + if data != nil { + return json.NewDecoder(resp.Body).Decode(data) + } + return nil + } +} + +func (client *httpClient) PostSuiteWillBegin(report types.Report) error { + return client.post("/suite-will-begin", report) +} + +func (client *httpClient) PostDidRun(report types.SpecReport) error { + return client.post("/did-run", report) +} + +func (client *httpClient) PostSuiteDidEnd(report types.Report) error { + return client.post("/suite-did-end", report) +} + +func (client *httpClient) PostEmitProgressReport(report types.ProgressReport) error { + return client.post("/progress-report", report) +} + +func (client *httpClient) PostReportBeforeSuiteCompleted(state types.SpecState) error { + return client.post("/report-before-suite-completed", state) +} + +func (client *httpClient) BlockUntilReportBeforeSuiteCompleted() (types.SpecState, error) { + var state types.SpecState + err := client.poll("/report-before-suite-state", &state) + if err == ErrorGone { + return types.SpecStateFailed, nil + } + return state, err +} + +func (client *httpClient) PostSynchronizedBeforeSuiteCompleted(state types.SpecState, data []byte) error { + beforeSuiteState := BeforeSuiteState{ + State: state, + Data: data, + } + return client.post("/before-suite-completed", beforeSuiteState) +} + +func (client *httpClient) BlockUntilSynchronizedBeforeSuiteData() (types.SpecState, []byte, error) { + var beforeSuiteState BeforeSuiteState + err := client.poll("/before-suite-state", &beforeSuiteState) + if err == ErrorGone { + return types.SpecStateInvalid, nil, types.GinkgoErrors.SynchronizedBeforeSuiteDisappearedOnProc1() + } + return beforeSuiteState.State, beforeSuiteState.Data, err +} + +func (client *httpClient) BlockUntilNonprimaryProcsHaveFinished() error { + return client.poll("/have-nonprimary-procs-finished", nil) +} + +func (client *httpClient) BlockUntilAggregatedNonprimaryProcsReport() (types.Report, error) { + var report types.Report + err := client.poll("/aggregated-nonprimary-procs-report", &report) + if err == ErrorGone { + return types.Report{}, types.GinkgoErrors.AggregatedReportUnavailableDueToNodeDisappearing() + } + return report, err +} + +func (client *httpClient) FetchNextCounter() (int, error) { + var counter ParallelIndexCounter + err := client.poll("/counter", &counter) + return counter.Index, err +} + +func (client *httpClient) PostAbort() error { + return client.post("/abort", nil) +} + +func (client *httpClient) ShouldAbort() bool { + err := client.poll("/abort", nil) + return err == ErrorGone +} + +func (client *httpClient) Write(p []byte) (int, error) { + resp, err := http.Post(client.serverHost+"/emit-output", "text/plain;charset=UTF-8 ", bytes.NewReader(p)) + resp.Body.Close() + if resp.StatusCode != http.StatusOK { + return 0, fmt.Errorf("failed to emit output") + } + return len(p), err +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/http_server.go b/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/http_server.go new file mode 100644 index 0000000..8a1b7a5 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/http_server.go @@ -0,0 +1,242 @@ +/* + +The remote package provides the pieces to allow Ginkgo test suites to report to remote listeners. +This is used, primarily, to enable streaming parallel test output but has, in principal, broader applications (e.g. streaming test output to a browser). + +*/ + +package parallel_support + +import ( + "encoding/json" + "io" + "net" + "net/http" + + "github.com/onsi/ginkgo/v2/reporters" + "github.com/onsi/ginkgo/v2/types" +) + +/* +httpServer spins up on an automatically selected port and listens for communication from the forwarding reporter. +It then forwards that communication to attached reporters. +*/ +type httpServer struct { + listener net.Listener + handler *ServerHandler +} + +// Create a new server, automatically selecting a port +func newHttpServer(parallelTotal int, reporter reporters.Reporter) (*httpServer, error) { + listener, err := net.Listen("tcp", "127.0.0.1:0") + if err != nil { + return nil, err + } + return &httpServer{ + listener: listener, + handler: newServerHandler(parallelTotal, reporter), + }, nil +} + +// Start the server. You don't need to `go s.Start()`, just `s.Start()` +func (server *httpServer) Start() { + httpServer := &http.Server{} + mux := http.NewServeMux() + httpServer.Handler = mux + + //streaming endpoints + mux.HandleFunc("/suite-will-begin", server.specSuiteWillBegin) + mux.HandleFunc("/did-run", server.didRun) + mux.HandleFunc("/suite-did-end", server.specSuiteDidEnd) + mux.HandleFunc("/emit-output", server.emitOutput) + mux.HandleFunc("/progress-report", server.emitProgressReport) + + //synchronization endpoints + mux.HandleFunc("/report-before-suite-completed", server.handleReportBeforeSuiteCompleted) + mux.HandleFunc("/report-before-suite-state", server.handleReportBeforeSuiteState) + mux.HandleFunc("/before-suite-completed", server.handleBeforeSuiteCompleted) + mux.HandleFunc("/before-suite-state", server.handleBeforeSuiteState) + mux.HandleFunc("/have-nonprimary-procs-finished", server.handleHaveNonprimaryProcsFinished) + mux.HandleFunc("/aggregated-nonprimary-procs-report", server.handleAggregatedNonprimaryProcsReport) + mux.HandleFunc("/counter", server.handleCounter) + mux.HandleFunc("/up", server.handleUp) + mux.HandleFunc("/abort", server.handleAbort) + + go httpServer.Serve(server.listener) +} + +// Stop the server +func (server *httpServer) Close() { + server.listener.Close() +} + +// The address the server can be reached it. Pass this into the `ForwardingReporter`. +func (server *httpServer) Address() string { + return "http://" + server.listener.Addr().String() +} + +func (server *httpServer) GetSuiteDone() chan any { + return server.handler.done +} + +func (server *httpServer) GetOutputDestination() io.Writer { + return server.handler.outputDestination +} + +func (server *httpServer) SetOutputDestination(w io.Writer) { + server.handler.outputDestination = w +} + +func (server *httpServer) RegisterAlive(node int, alive func() bool) { + server.handler.registerAlive(node, alive) +} + +// +// Streaming Endpoints +// + +// The server will forward all received messages to Ginkgo reporters registered with `RegisterReporters` +func (server *httpServer) decode(writer http.ResponseWriter, request *http.Request, object any) bool { + defer request.Body.Close() + if json.NewDecoder(request.Body).Decode(object) != nil { + writer.WriteHeader(http.StatusBadRequest) + return false + } + return true +} + +func (server *httpServer) handleError(err error, writer http.ResponseWriter) bool { + if err == nil { + return false + } + switch err { + case ErrorEarly: + writer.WriteHeader(http.StatusTooEarly) + case ErrorGone: + writer.WriteHeader(http.StatusGone) + case ErrorFailed: + writer.WriteHeader(http.StatusFailedDependency) + default: + writer.WriteHeader(http.StatusInternalServerError) + } + return true +} + +func (server *httpServer) specSuiteWillBegin(writer http.ResponseWriter, request *http.Request) { + var report types.Report + if !server.decode(writer, request, &report) { + return + } + + server.handleError(server.handler.SpecSuiteWillBegin(report, voidReceiver), writer) +} + +func (server *httpServer) didRun(writer http.ResponseWriter, request *http.Request) { + var report types.SpecReport + if !server.decode(writer, request, &report) { + return + } + + server.handleError(server.handler.DidRun(report, voidReceiver), writer) +} + +func (server *httpServer) specSuiteDidEnd(writer http.ResponseWriter, request *http.Request) { + var report types.Report + if !server.decode(writer, request, &report) { + return + } + server.handleError(server.handler.SpecSuiteDidEnd(report, voidReceiver), writer) +} + +func (server *httpServer) emitOutput(writer http.ResponseWriter, request *http.Request) { + output, err := io.ReadAll(request.Body) + if err != nil { + writer.WriteHeader(http.StatusInternalServerError) + return + } + var n int + server.handleError(server.handler.EmitOutput(output, &n), writer) +} + +func (server *httpServer) emitProgressReport(writer http.ResponseWriter, request *http.Request) { + var report types.ProgressReport + if !server.decode(writer, request, &report) { + return + } + server.handleError(server.handler.EmitProgressReport(report, voidReceiver), writer) +} + +func (server *httpServer) handleReportBeforeSuiteCompleted(writer http.ResponseWriter, request *http.Request) { + var state types.SpecState + if !server.decode(writer, request, &state) { + return + } + + server.handleError(server.handler.ReportBeforeSuiteCompleted(state, voidReceiver), writer) +} + +func (server *httpServer) handleReportBeforeSuiteState(writer http.ResponseWriter, request *http.Request) { + var state types.SpecState + if server.handleError(server.handler.ReportBeforeSuiteState(voidSender, &state), writer) { + return + } + json.NewEncoder(writer).Encode(state) +} + +func (server *httpServer) handleBeforeSuiteCompleted(writer http.ResponseWriter, request *http.Request) { + var beforeSuiteState BeforeSuiteState + if !server.decode(writer, request, &beforeSuiteState) { + return + } + + server.handleError(server.handler.BeforeSuiteCompleted(beforeSuiteState, voidReceiver), writer) +} + +func (server *httpServer) handleBeforeSuiteState(writer http.ResponseWriter, request *http.Request) { + var beforeSuiteState BeforeSuiteState + if server.handleError(server.handler.BeforeSuiteState(voidSender, &beforeSuiteState), writer) { + return + } + json.NewEncoder(writer).Encode(beforeSuiteState) +} + +func (server *httpServer) handleHaveNonprimaryProcsFinished(writer http.ResponseWriter, request *http.Request) { + if server.handleError(server.handler.HaveNonprimaryProcsFinished(voidSender, voidReceiver), writer) { + return + } + writer.WriteHeader(http.StatusOK) +} + +func (server *httpServer) handleAggregatedNonprimaryProcsReport(writer http.ResponseWriter, request *http.Request) { + var aggregatedReport types.Report + if server.handleError(server.handler.AggregatedNonprimaryProcsReport(voidSender, &aggregatedReport), writer) { + return + } + json.NewEncoder(writer).Encode(aggregatedReport) +} + +func (server *httpServer) handleCounter(writer http.ResponseWriter, request *http.Request) { + var n int + if server.handleError(server.handler.Counter(voidSender, &n), writer) { + return + } + json.NewEncoder(writer).Encode(ParallelIndexCounter{Index: n}) +} + +func (server *httpServer) handleUp(writer http.ResponseWriter, request *http.Request) { + writer.WriteHeader(http.StatusOK) +} + +func (server *httpServer) handleAbort(writer http.ResponseWriter, request *http.Request) { + if request.Method == "GET" { + var shouldAbort bool + server.handler.ShouldAbort(voidSender, &shouldAbort) + if shouldAbort { + writer.WriteHeader(http.StatusGone) + } else { + writer.WriteHeader(http.StatusOK) + } + } else { + server.handler.Abort(voidSender, voidReceiver) + } +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/rpc_client.go b/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/rpc_client.go new file mode 100644 index 0000000..bb4675a --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/rpc_client.go @@ -0,0 +1,136 @@ +package parallel_support + +import ( + "net/rpc" + "time" + + "github.com/onsi/ginkgo/v2/types" +) + +type rpcClient struct { + serverHost string + client *rpc.Client +} + +func newRPCClient(serverHost string) *rpcClient { + return &rpcClient{ + serverHost: serverHost, + } +} + +func (client *rpcClient) Connect() bool { + var err error + if client.client != nil { + return true + } + client.client, err = rpc.DialHTTPPath("tcp", client.serverHost, "/") + if err != nil { + client.client = nil + return false + } + return true +} + +func (client *rpcClient) Close() error { + return client.client.Close() +} + +func (client *rpcClient) poll(method string, data any) error { + for { + err := client.client.Call(method, voidSender, data) + if err == nil { + return nil + } + switch err.Error() { + case ErrorEarly.Error(): + time.Sleep(POLLING_INTERVAL) + case ErrorGone.Error(): + return ErrorGone + case ErrorFailed.Error(): + return ErrorFailed + default: + return err + } + } +} + +func (client *rpcClient) PostSuiteWillBegin(report types.Report) error { + return client.client.Call("Server.SpecSuiteWillBegin", report, voidReceiver) +} + +func (client *rpcClient) PostDidRun(report types.SpecReport) error { + return client.client.Call("Server.DidRun", report, voidReceiver) +} + +func (client *rpcClient) PostSuiteDidEnd(report types.Report) error { + return client.client.Call("Server.SpecSuiteDidEnd", report, voidReceiver) +} + +func (client *rpcClient) Write(p []byte) (int, error) { + var n int + err := client.client.Call("Server.EmitOutput", p, &n) + return n, err +} + +func (client *rpcClient) PostEmitProgressReport(report types.ProgressReport) error { + return client.client.Call("Server.EmitProgressReport", report, voidReceiver) +} + +func (client *rpcClient) PostReportBeforeSuiteCompleted(state types.SpecState) error { + return client.client.Call("Server.ReportBeforeSuiteCompleted", state, voidReceiver) +} + +func (client *rpcClient) BlockUntilReportBeforeSuiteCompleted() (types.SpecState, error) { + var state types.SpecState + err := client.poll("Server.ReportBeforeSuiteState", &state) + if err == ErrorGone { + return types.SpecStateFailed, nil + } + return state, err +} + +func (client *rpcClient) PostSynchronizedBeforeSuiteCompleted(state types.SpecState, data []byte) error { + beforeSuiteState := BeforeSuiteState{ + State: state, + Data: data, + } + return client.client.Call("Server.BeforeSuiteCompleted", beforeSuiteState, voidReceiver) +} + +func (client *rpcClient) BlockUntilSynchronizedBeforeSuiteData() (types.SpecState, []byte, error) { + var beforeSuiteState BeforeSuiteState + err := client.poll("Server.BeforeSuiteState", &beforeSuiteState) + if err == ErrorGone { + return types.SpecStateInvalid, nil, types.GinkgoErrors.SynchronizedBeforeSuiteDisappearedOnProc1() + } + return beforeSuiteState.State, beforeSuiteState.Data, err +} + +func (client *rpcClient) BlockUntilNonprimaryProcsHaveFinished() error { + return client.poll("Server.HaveNonprimaryProcsFinished", voidReceiver) +} + +func (client *rpcClient) BlockUntilAggregatedNonprimaryProcsReport() (types.Report, error) { + var report types.Report + err := client.poll("Server.AggregatedNonprimaryProcsReport", &report) + if err == ErrorGone { + return types.Report{}, types.GinkgoErrors.AggregatedReportUnavailableDueToNodeDisappearing() + } + return report, err +} + +func (client *rpcClient) FetchNextCounter() (int, error) { + var counter int + err := client.client.Call("Server.Counter", voidSender, &counter) + return counter, err +} + +func (client *rpcClient) PostAbort() error { + return client.client.Call("Server.Abort", voidSender, voidReceiver) +} + +func (client *rpcClient) ShouldAbort() bool { + var shouldAbort bool + client.client.Call("Server.ShouldAbort", voidSender, &shouldAbort) + return shouldAbort +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/rpc_server.go b/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/rpc_server.go new file mode 100644 index 0000000..1574f99 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/rpc_server.go @@ -0,0 +1,75 @@ +/* + +The remote package provides the pieces to allow Ginkgo test suites to report to remote listeners. +This is used, primarily, to enable streaming parallel test output but has, in principal, broader applications (e.g. streaming test output to a browser). + +*/ + +package parallel_support + +import ( + "io" + "net" + "net/http" + "net/rpc" + + "github.com/onsi/ginkgo/v2/reporters" +) + +/* +RPCServer spins up on an automatically selected port and listens for communication from the forwarding reporter. +It then forwards that communication to attached reporters. +*/ +type RPCServer struct { + listener net.Listener + handler *ServerHandler +} + +// Create a new server, automatically selecting a port +func newRPCServer(parallelTotal int, reporter reporters.Reporter) (*RPCServer, error) { + listener, err := net.Listen("tcp", "127.0.0.1:0") + if err != nil { + return nil, err + } + return &RPCServer{ + listener: listener, + handler: newServerHandler(parallelTotal, reporter), + }, nil +} + +// Start the server. You don't need to `go s.Start()`, just `s.Start()` +func (server *RPCServer) Start() { + rpcServer := rpc.NewServer() + rpcServer.RegisterName("Server", server.handler) //register the handler's methods as the server + + httpServer := &http.Server{} + httpServer.Handler = rpcServer + + go httpServer.Serve(server.listener) +} + +// Stop the server +func (server *RPCServer) Close() { + server.listener.Close() +} + +// The address the server can be reached it. Pass this into the `ForwardingReporter`. +func (server *RPCServer) Address() string { + return server.listener.Addr().String() +} + +func (server *RPCServer) GetSuiteDone() chan any { + return server.handler.done +} + +func (server *RPCServer) GetOutputDestination() io.Writer { + return server.handler.outputDestination +} + +func (server *RPCServer) SetOutputDestination(w io.Writer) { + server.handler.outputDestination = w +} + +func (server *RPCServer) RegisterAlive(node int, alive func() bool) { + server.handler.registerAlive(node, alive) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/server_handler.go b/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/server_handler.go new file mode 100644 index 0000000..ab9e113 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/internal/parallel_support/server_handler.go @@ -0,0 +1,234 @@ +package parallel_support + +import ( + "io" + "os" + "sync" + + "github.com/onsi/ginkgo/v2/reporters" + "github.com/onsi/ginkgo/v2/types" +) + +type Void struct{} + +var voidReceiver *Void = &Void{} +var voidSender Void + +// ServerHandler is an RPC-compatible handler that is shared between the http server and the rpc server. +// It handles all the business logic to avoid duplication between the two servers + +type ServerHandler struct { + done chan any + outputDestination io.Writer + reporter reporters.Reporter + alives []func() bool + lock *sync.Mutex + beforeSuiteState BeforeSuiteState + reportBeforeSuiteState types.SpecState + parallelTotal int + counter int + counterLock *sync.Mutex + shouldAbort bool + + numSuiteDidBegins int + numSuiteDidEnds int + aggregatedReport types.Report + reportHoldingArea []types.SpecReport +} + +func newServerHandler(parallelTotal int, reporter reporters.Reporter) *ServerHandler { + return &ServerHandler{ + reporter: reporter, + lock: &sync.Mutex{}, + counterLock: &sync.Mutex{}, + alives: make([]func() bool, parallelTotal), + beforeSuiteState: BeforeSuiteState{Data: nil, State: types.SpecStateInvalid}, + + parallelTotal: parallelTotal, + outputDestination: os.Stdout, + done: make(chan any), + } +} + +func (handler *ServerHandler) SpecSuiteWillBegin(report types.Report, _ *Void) error { + handler.lock.Lock() + defer handler.lock.Unlock() + + handler.numSuiteDidBegins += 1 + + // all summaries are identical, so it's fine to simply emit the last one of these + if handler.numSuiteDidBegins == handler.parallelTotal { + handler.reporter.SuiteWillBegin(report) + + for _, summary := range handler.reportHoldingArea { + handler.reporter.WillRun(summary) + handler.reporter.DidRun(summary) + } + + handler.reportHoldingArea = nil + } + + return nil +} + +func (handler *ServerHandler) DidRun(report types.SpecReport, _ *Void) error { + handler.lock.Lock() + defer handler.lock.Unlock() + + if handler.numSuiteDidBegins == handler.parallelTotal { + handler.reporter.WillRun(report) + handler.reporter.DidRun(report) + } else { + handler.reportHoldingArea = append(handler.reportHoldingArea, report) + } + + return nil +} + +func (handler *ServerHandler) SpecSuiteDidEnd(report types.Report, _ *Void) error { + handler.lock.Lock() + defer handler.lock.Unlock() + + handler.numSuiteDidEnds += 1 + if handler.numSuiteDidEnds == 1 { + handler.aggregatedReport = report + } else { + handler.aggregatedReport = handler.aggregatedReport.Add(report) + } + + if handler.numSuiteDidEnds == handler.parallelTotal { + handler.reporter.SuiteDidEnd(handler.aggregatedReport) + close(handler.done) + } + + return nil +} + +func (handler *ServerHandler) EmitOutput(output []byte, n *int) error { + var err error + *n, err = handler.outputDestination.Write(output) + return err +} + +func (handler *ServerHandler) EmitProgressReport(report types.ProgressReport, _ *Void) error { + handler.lock.Lock() + defer handler.lock.Unlock() + handler.reporter.EmitProgressReport(report) + return nil +} + +func (handler *ServerHandler) registerAlive(proc int, alive func() bool) { + handler.lock.Lock() + defer handler.lock.Unlock() + handler.alives[proc-1] = alive +} + +func (handler *ServerHandler) procIsAlive(proc int) bool { + handler.lock.Lock() + defer handler.lock.Unlock() + alive := handler.alives[proc-1] + if alive == nil { + return true + } + return alive() +} + +func (handler *ServerHandler) haveNonprimaryProcsFinished() bool { + for i := 2; i <= handler.parallelTotal; i++ { + if handler.procIsAlive(i) { + return false + } + } + return true +} + +func (handler *ServerHandler) ReportBeforeSuiteCompleted(reportBeforeSuiteState types.SpecState, _ *Void) error { + handler.lock.Lock() + defer handler.lock.Unlock() + handler.reportBeforeSuiteState = reportBeforeSuiteState + + return nil +} + +func (handler *ServerHandler) ReportBeforeSuiteState(_ Void, reportBeforeSuiteState *types.SpecState) error { + proc1IsAlive := handler.procIsAlive(1) + handler.lock.Lock() + defer handler.lock.Unlock() + if handler.reportBeforeSuiteState == types.SpecStateInvalid { + if proc1IsAlive { + return ErrorEarly + } else { + return ErrorGone + } + } + *reportBeforeSuiteState = handler.reportBeforeSuiteState + return nil +} + +func (handler *ServerHandler) BeforeSuiteCompleted(beforeSuiteState BeforeSuiteState, _ *Void) error { + handler.lock.Lock() + defer handler.lock.Unlock() + handler.beforeSuiteState = beforeSuiteState + + return nil +} + +func (handler *ServerHandler) BeforeSuiteState(_ Void, beforeSuiteState *BeforeSuiteState) error { + proc1IsAlive := handler.procIsAlive(1) + handler.lock.Lock() + defer handler.lock.Unlock() + if handler.beforeSuiteState.State == types.SpecStateInvalid { + if proc1IsAlive { + return ErrorEarly + } else { + return ErrorGone + } + } + *beforeSuiteState = handler.beforeSuiteState + return nil +} + +func (handler *ServerHandler) HaveNonprimaryProcsFinished(_ Void, _ *Void) error { + if handler.haveNonprimaryProcsFinished() { + return nil + } else { + return ErrorEarly + } +} + +func (handler *ServerHandler) AggregatedNonprimaryProcsReport(_ Void, report *types.Report) error { + if handler.haveNonprimaryProcsFinished() { + handler.lock.Lock() + defer handler.lock.Unlock() + if handler.numSuiteDidEnds == handler.parallelTotal-1 { + *report = handler.aggregatedReport + return nil + } else { + return ErrorGone + } + } else { + return ErrorEarly + } +} + +func (handler *ServerHandler) Counter(_ Void, counter *int) error { + handler.counterLock.Lock() + defer handler.counterLock.Unlock() + *counter = handler.counter + handler.counter++ + return nil +} + +func (handler *ServerHandler) Abort(_ Void, _ *Void) error { + handler.lock.Lock() + defer handler.lock.Unlock() + handler.shouldAbort = true + return nil +} + +func (handler *ServerHandler) ShouldAbort(_ Void, shouldAbort *bool) error { + handler.lock.Lock() + defer handler.lock.Unlock() + *shouldAbort = handler.shouldAbort + return nil +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/internal/reporters/gojson.go b/backend/vendor/github.com/onsi/ginkgo/v2/internal/reporters/gojson.go new file mode 100644 index 0000000..8b7a9ce --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/internal/reporters/gojson.go @@ -0,0 +1,158 @@ +package reporters + +import ( + "errors" + "fmt" + "strings" + "time" + + "github.com/onsi/ginkgo/v2/types" + "golang.org/x/tools/go/packages" +) + +func ptr[T any](in T) *T { + return &in +} + +type encoder interface { + Encode(v any) error +} + +// gojsonEvent matches the format from go internals +// https://github.com/golang/go/blob/master/src/cmd/internal/test2json/test2json.go#L31-L41 +// https://pkg.go.dev/cmd/test2json +type gojsonEvent struct { + Time *time.Time `json:",omitempty"` + Action GoJSONAction + Package string `json:",omitempty"` + Test string `json:",omitempty"` + Elapsed *float64 `json:",omitempty"` + Output *string `json:",omitempty"` + FailedBuild string `json:",omitempty"` +} + +type GoJSONAction string + +const ( + // start - the test binary is about to be executed + GoJSONStart GoJSONAction = "start" + // run - the test has started running + GoJSONRun GoJSONAction = "run" + // pause - the test has been paused + GoJSONPause GoJSONAction = "pause" + // cont - the test has continued running + GoJSONCont GoJSONAction = "cont" + // pass - the test passed + GoJSONPass GoJSONAction = "pass" + // bench - the benchmark printed log output but did not fail + GoJSONBench GoJSONAction = "bench" + // fail - the test or benchmark failed + GoJSONFail GoJSONAction = "fail" + // output - the test printed output + GoJSONOutput GoJSONAction = "output" + // skip - the test was skipped or the package contained no tests + GoJSONSkip GoJSONAction = "skip" +) + +func goJSONActionFromSpecState(state types.SpecState) GoJSONAction { + switch state { + case types.SpecStateInvalid: + return GoJSONFail + case types.SpecStatePending: + return GoJSONSkip + case types.SpecStateSkipped: + return GoJSONSkip + case types.SpecStatePassed: + return GoJSONPass + case types.SpecStateFailed: + return GoJSONFail + case types.SpecStateAborted: + return GoJSONFail + case types.SpecStatePanicked: + return GoJSONFail + case types.SpecStateInterrupted: + return GoJSONFail + case types.SpecStateTimedout: + return GoJSONFail + default: + panic("unexpected state should not happen") + } +} + +// gojsonReport wraps types.Report and calcualtes extra fields requires by gojson +type gojsonReport struct { + o types.Report + // Extra calculated fields + goPkg string + elapsed float64 +} + +func newReport(in types.Report) *gojsonReport { + return &gojsonReport{ + o: in, + } +} + +func (r *gojsonReport) Fill() error { + // NOTE: could the types.Report include the go package name? + goPkg, err := suitePathToPkg(r.o.SuitePath) + if err != nil { + return err + } + r.goPkg = goPkg + r.elapsed = r.o.RunTime.Seconds() + return nil +} + +// gojsonSpecReport wraps types.SpecReport and calculates extra fields required by gojson +type gojsonSpecReport struct { + o types.SpecReport + // extra calculated fields + testName string + elapsed float64 + action GoJSONAction +} + +func newSpecReport(in types.SpecReport) *gojsonSpecReport { + return &gojsonSpecReport{ + o: in, + } +} + +func (sr *gojsonSpecReport) Fill() error { + sr.elapsed = sr.o.RunTime.Seconds() + sr.testName = createTestName(sr.o) + sr.action = goJSONActionFromSpecState(sr.o.State) + return nil +} + +func suitePathToPkg(dir string) (string, error) { + cfg := &packages.Config{ + Mode: packages.NeedFiles | packages.NeedSyntax, + } + pkgs, err := packages.Load(cfg, dir) + if err != nil { + return "", err + } + if len(pkgs) != 1 { + return "", errors.New("error") + } + return pkgs[0].ID, nil +} + +func createTestName(spec types.SpecReport) string { + name := fmt.Sprintf("[%s]", spec.LeafNodeType) + if spec.FullText() != "" { + name = name + " " + spec.FullText() + } + labels := spec.Labels() + if len(labels) > 0 { + name = name + " [" + strings.Join(labels, ", ") + "]" + } + semVerConstraints := spec.SemVerConstraints() + if len(semVerConstraints) > 0 { + name = name + " [" + strings.Join(semVerConstraints, ", ") + "]" + } + name = strings.TrimSpace(name) + return name +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/internal/reporters/gojson_event_writer.go b/backend/vendor/github.com/onsi/ginkgo/v2/internal/reporters/gojson_event_writer.go new file mode 100644 index 0000000..ec5311d --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/internal/reporters/gojson_event_writer.go @@ -0,0 +1,111 @@ +package reporters + +type GoJSONEventWriter struct { + enc encoder + specSystemErrFn specSystemExtractFn + specSystemOutFn specSystemExtractFn +} + +func NewGoJSONEventWriter(enc encoder, errFn specSystemExtractFn, outFn specSystemExtractFn) *GoJSONEventWriter { + return &GoJSONEventWriter{ + enc: enc, + specSystemErrFn: errFn, + specSystemOutFn: outFn, + } +} + +func (r *GoJSONEventWriter) writeEvent(e *gojsonEvent) error { + return r.enc.Encode(e) +} + +func (r *GoJSONEventWriter) WriteSuiteStart(report *gojsonReport) error { + e := &gojsonEvent{ + Time: &report.o.StartTime, + Action: GoJSONStart, + Package: report.goPkg, + Output: nil, + FailedBuild: "", + } + return r.writeEvent(e) +} + +func (r *GoJSONEventWriter) WriteSuiteResult(report *gojsonReport) error { + var action GoJSONAction + switch { + case report.o.PreRunStats.SpecsThatWillRun == 0: + action = GoJSONSkip + case report.o.SuiteSucceeded: + action = GoJSONPass + default: + action = GoJSONFail + } + e := &gojsonEvent{ + Time: &report.o.EndTime, + Action: action, + Package: report.goPkg, + Output: nil, + FailedBuild: "", + Elapsed: ptr(report.elapsed), + } + return r.writeEvent(e) +} + +func (r *GoJSONEventWriter) WriteSpecStart(report *gojsonReport, specReport *gojsonSpecReport) error { + e := &gojsonEvent{ + Time: &specReport.o.StartTime, + Action: GoJSONRun, + Test: specReport.testName, + Package: report.goPkg, + Output: nil, + FailedBuild: "", + } + return r.writeEvent(e) +} + +func (r *GoJSONEventWriter) WriteSpecOut(report *gojsonReport, specReport *gojsonSpecReport) error { + events := []*gojsonEvent{} + + stdErr := r.specSystemErrFn(specReport.o) + if stdErr != "" { + events = append(events, &gojsonEvent{ + Time: &specReport.o.EndTime, + Action: GoJSONOutput, + Test: specReport.testName, + Package: report.goPkg, + Output: ptr(stdErr), + FailedBuild: "", + }) + } + stdOut := r.specSystemOutFn(specReport.o) + if stdOut != "" { + events = append(events, &gojsonEvent{ + Time: &specReport.o.EndTime, + Action: GoJSONOutput, + Test: specReport.testName, + Package: report.goPkg, + Output: ptr(stdOut), + FailedBuild: "", + }) + } + + for _, ev := range events { + err := r.writeEvent(ev) + if err != nil { + return err + } + } + return nil +} + +func (r *GoJSONEventWriter) WriteSpecResult(report *gojsonReport, specReport *gojsonSpecReport) error { + e := &gojsonEvent{ + Time: &specReport.o.EndTime, + Action: specReport.action, + Test: specReport.testName, + Package: report.goPkg, + Elapsed: ptr(specReport.elapsed), + Output: nil, + FailedBuild: "", + } + return r.writeEvent(e) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/internal/reporters/gojson_reporter.go b/backend/vendor/github.com/onsi/ginkgo/v2/internal/reporters/gojson_reporter.go new file mode 100644 index 0000000..633e49b --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/internal/reporters/gojson_reporter.go @@ -0,0 +1,45 @@ +package reporters + +import ( + "github.com/onsi/ginkgo/v2/types" +) + +type GoJSONReporter struct { + ev *GoJSONEventWriter +} + +type specSystemExtractFn func (spec types.SpecReport) string + +func NewGoJSONReporter(enc encoder, errFn specSystemExtractFn, outFn specSystemExtractFn) *GoJSONReporter { + return &GoJSONReporter{ + ev: NewGoJSONEventWriter(enc, errFn, outFn), + } +} + +func (r *GoJSONReporter) Write(originalReport types.Report) error { + // suite start events + report := newReport(originalReport) + err := report.Fill() + if err != nil { + return err + } + r.ev.WriteSuiteStart(report) + for _, originalSpecReport := range originalReport.SpecReports { + specReport := newSpecReport(originalSpecReport) + err := specReport.Fill() + if err != nil { + return err + } + if specReport.o.LeafNodeType == types.NodeTypeIt { + // handle any It leaf node as a spec + r.ev.WriteSpecStart(report, specReport) + r.ev.WriteSpecOut(report, specReport) + r.ev.WriteSpecResult(report, specReport) + } else { + // handle any other leaf node as generic output + r.ev.WriteSpecOut(report, specReport) + } + } + r.ev.WriteSuiteResult(report) + return nil +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/reporters/default_reporter.go b/backend/vendor/github.com/onsi/ginkgo/v2/reporters/default_reporter.go new file mode 100644 index 0000000..026d9cf --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/reporters/default_reporter.go @@ -0,0 +1,824 @@ +/* +Ginkgo's Default Reporter + +A number of command line flags are available to tweak Ginkgo's default output. + +These are documented [here](http://onsi.github.io/ginkgo/#running_tests) +*/ +package reporters + +import ( + "fmt" + "io" + "runtime" + "strings" + "sync" + "time" + + "github.com/onsi/ginkgo/v2/formatter" + "github.com/onsi/ginkgo/v2/types" +) + +type DefaultReporter struct { + conf types.ReporterConfig + writer io.Writer + + // managing the emission stream + lastCharWasNewline bool + lastEmissionWasDelimiter bool + + // rendering + specDenoter string + retryDenoter string + formatter formatter.Formatter + + runningInParallel bool + lock *sync.Mutex +} + +func NewDefaultReporterUnderTest(conf types.ReporterConfig, writer io.Writer) *DefaultReporter { + reporter := NewDefaultReporter(conf, writer) + reporter.formatter = formatter.New(formatter.ColorModePassthrough) + + return reporter +} + +func NewDefaultReporter(conf types.ReporterConfig, writer io.Writer) *DefaultReporter { + reporter := &DefaultReporter{ + conf: conf, + writer: writer, + + lastCharWasNewline: true, + lastEmissionWasDelimiter: false, + + specDenoter: "•", + retryDenoter: "↺", + formatter: formatter.NewWithNoColorBool(conf.NoColor), + lock: &sync.Mutex{}, + } + if runtime.GOOS == "windows" { + reporter.specDenoter = "+" + reporter.retryDenoter = "R" + } + + return reporter +} + +/* The Reporter Interface */ + +func (r *DefaultReporter) SuiteWillBegin(report types.Report) { + if r.conf.Verbosity().Is(types.VerbosityLevelSuccinct) { + r.emit(r.f("[%d] {{bold}}%s{{/}} ", report.SuiteConfig.RandomSeed, report.SuiteDescription)) + if len(report.SuiteLabels) > 0 { + r.emit(r.f("{{coral}}[%s]{{/}} ", strings.Join(report.SuiteLabels, ", "))) + } + if len(report.SuiteSemVerConstraints) > 0 { + r.emit(r.f("{{coral}}[%s]{{/}} ", strings.Join(report.SuiteSemVerConstraints, ", "))) + } + r.emit(r.f("- %d/%d specs ", report.PreRunStats.SpecsThatWillRun, report.PreRunStats.TotalSpecs)) + if report.SuiteConfig.ParallelTotal > 1 { + r.emit(r.f("- %d procs ", report.SuiteConfig.ParallelTotal)) + } + } else { + banner := r.f("Running Suite: %s - %s", report.SuiteDescription, report.SuitePath) + r.emitBlock(banner) + bannerWidth := len(banner) + if len(report.SuiteLabels) > 0 { + labels := strings.Join(report.SuiteLabels, ", ") + r.emitBlock(r.f("{{coral}}[%s]{{/}} ", labels)) + if len(labels)+2 > bannerWidth { + bannerWidth = len(labels) + 2 + } + } + if len(report.SuiteSemVerConstraints) > 0 { + semVerConstraints := strings.Join(report.SuiteSemVerConstraints, ", ") + r.emitBlock(r.f("{{coral}}[%s]{{/}} ", semVerConstraints)) + if len(semVerConstraints)+2 > bannerWidth { + bannerWidth = len(semVerConstraints) + 2 + } + } + r.emitBlock(strings.Repeat("=", bannerWidth)) + + out := r.f("Random Seed: {{bold}}%d{{/}}", report.SuiteConfig.RandomSeed) + if report.SuiteConfig.RandomizeAllSpecs { + out += r.f(" - will randomize all specs") + } + r.emitBlock(out) + r.emit("\n") + r.emitBlock(r.f("Will run {{bold}}%d{{/}} of {{bold}}%d{{/}} specs", report.PreRunStats.SpecsThatWillRun, report.PreRunStats.TotalSpecs)) + if report.SuiteConfig.ParallelTotal > 1 { + r.emitBlock(r.f("Running in parallel across {{bold}}%d{{/}} processes", report.SuiteConfig.ParallelTotal)) + } + } +} + +func (r *DefaultReporter) SuiteDidEnd(report types.Report) { + failures := report.SpecReports.WithState(types.SpecStateFailureStates) + if len(failures) > 0 { + r.emitBlock("\n") + if len(failures) > 1 { + r.emitBlock(r.f("{{red}}{{bold}}Summarizing %d Failures:{{/}}", len(failures))) + } else { + r.emitBlock(r.f("{{red}}{{bold}}Summarizing 1 Failure:{{/}}")) + } + for _, specReport := range failures { + highlightColor, heading := "{{red}}", "[FAIL]" + switch specReport.State { + case types.SpecStatePanicked: + highlightColor, heading = "{{magenta}}", "[PANICKED!]" + case types.SpecStateAborted: + highlightColor, heading = "{{coral}}", "[ABORTED]" + case types.SpecStateTimedout: + highlightColor, heading = "{{orange}}", "[TIMEDOUT]" + case types.SpecStateInterrupted: + highlightColor, heading = "{{orange}}", "[INTERRUPTED]" + } + locationBlock := r.codeLocationBlock(specReport, highlightColor, false, true) + r.emitBlock(r.fi(1, highlightColor+"%s{{/}} %s", heading, locationBlock)) + } + } + + //summarize the suite + if r.conf.Verbosity().Is(types.VerbosityLevelSuccinct) && report.SuiteSucceeded { + r.emit(r.f(" {{green}}SUCCESS!{{/}} %s ", report.RunTime)) + return + } + + r.emitBlock("\n") + color, status := "{{green}}{{bold}}", "SUCCESS!" + if !report.SuiteSucceeded { + color, status = "{{red}}{{bold}}", "FAIL!" + } + + specs := report.SpecReports.WithLeafNodeType(types.NodeTypeIt) //exclude any suite setup nodes + r.emitBlock(r.f(color+"Ran %d of %d Specs in %.3f seconds{{/}}", + specs.CountWithState(types.SpecStatePassed)+specs.CountWithState(types.SpecStateFailureStates), + report.PreRunStats.TotalSpecs, + report.RunTime.Seconds()), + ) + + switch len(report.SpecialSuiteFailureReasons) { + case 0: + r.emit(r.f(color+"%s{{/}} -- ", status)) + case 1: + r.emit(r.f(color+"%s - %s{{/}} -- ", status, report.SpecialSuiteFailureReasons[0])) + default: + r.emitBlock(r.f(color+"%s - %s{{/}}\n", status, strings.Join(report.SpecialSuiteFailureReasons, ", "))) + } + + if len(specs) == 0 && report.SpecReports.WithLeafNodeType(types.NodeTypeBeforeSuite|types.NodeTypeSynchronizedBeforeSuite).CountWithState(types.SpecStateFailureStates) > 0 { + r.emit(r.f("{{cyan}}{{bold}}A BeforeSuite node failed so all tests were skipped.{{/}}\n")) + } else { + r.emit(r.f("{{green}}{{bold}}%d Passed{{/}} | ", specs.CountWithState(types.SpecStatePassed))) + r.emit(r.f("{{red}}{{bold}}%d Failed{{/}} | ", specs.CountWithState(types.SpecStateFailureStates))) + if specs.CountOfFlakedSpecs() > 0 { + r.emit(r.f("{{light-yellow}}{{bold}}%d Flaked{{/}} | ", specs.CountOfFlakedSpecs())) + } + if specs.CountOfRepeatedSpecs() > 0 { + r.emit(r.f("{{light-yellow}}{{bold}}%d Repeated{{/}} | ", specs.CountOfRepeatedSpecs())) + } + r.emit(r.f("{{yellow}}{{bold}}%d Pending{{/}} | ", specs.CountWithState(types.SpecStatePending))) + r.emit(r.f("{{cyan}}{{bold}}%d Skipped{{/}}\n", specs.CountWithState(types.SpecStateSkipped))) + } +} + +func (r *DefaultReporter) WillRun(report types.SpecReport) { + v := r.conf.Verbosity() + if v.LT(types.VerbosityLevelVerbose) || report.State.Is(types.SpecStatePending|types.SpecStateSkipped) || report.RunningInParallel { + return + } + + r.emitDelimiter(0) + r.emitBlock(r.f(r.codeLocationBlock(report, "{{/}}", v.Is(types.VerbosityLevelVeryVerbose), false))) +} + +func (r *DefaultReporter) wrapTextBlock(sectionName string, fn func()) { + r.emitBlock("\n") + if r.conf.GithubOutput { + r.emitBlock(r.fi(1, "::group::%s", sectionName)) + } else { + r.emitBlock(r.fi(1, "{{gray}}%s >>{{/}}", sectionName)) + } + fn() + if r.conf.GithubOutput { + r.emitBlock(r.fi(1, "::endgroup::")) + } else { + r.emitBlock(r.fi(1, "{{gray}}<< %s{{/}}", sectionName)) + } + +} + +func (r *DefaultReporter) DidRun(report types.SpecReport) { + v := r.conf.Verbosity() + inParallel := report.RunningInParallel + + //should we completely omit this spec? + if report.State.Is(types.SpecStateSkipped) && r.conf.SilenceSkips { + return + } + + header := r.specDenoter + if report.LeafNodeType.Is(types.NodeTypesForSuiteLevelNodes) { + header = fmt.Sprintf("[%s]", report.LeafNodeType) + } + highlightColor := r.highlightColorForState(report.State) + + // have we already been streaming the timeline? + timelineHasBeenStreaming := v.GTE(types.VerbosityLevelVerbose) && !inParallel + + // should we show the timeline? + var timeline types.Timeline + showTimeline := !timelineHasBeenStreaming && (v.GTE(types.VerbosityLevelVerbose) || report.Failed()) + if showTimeline { + timeline = report.Timeline().WithoutHiddenReportEntries() + keepVeryVerboseSpecEvents := v.Is(types.VerbosityLevelVeryVerbose) || + (v.Is(types.VerbosityLevelVerbose) && r.conf.ShowNodeEvents) || + (report.Failed() && r.conf.ShowNodeEvents) + if !keepVeryVerboseSpecEvents { + timeline = timeline.WithoutVeryVerboseSpecEvents() + } + if len(timeline) == 0 && report.CapturedGinkgoWriterOutput == "" { + // the timeline is completely empty - don't show it + showTimeline = false + } + if v.LT(types.VerbosityLevelVeryVerbose) && report.CapturedGinkgoWriterOutput == "" && len(timeline) > 0 { + //if we aren't -vv and the timeline only has a single failure, don't show it as it will appear at the end of the report + failure, isFailure := timeline[0].(types.Failure) + if isFailure && (len(timeline) == 1 || (len(timeline) == 2 && failure.AdditionalFailure != nil)) { + showTimeline = false + } + } + } + + // should we have a separate section for always-visible reports? + showSeparateVisibilityAlwaysReportsSection := !timelineHasBeenStreaming && !showTimeline && report.ReportEntries.HasVisibility(types.ReportEntryVisibilityAlways) + + // should we have a separate section for captured stdout/stderr + showSeparateStdSection := inParallel && (report.CapturedStdOutErr != "") + + // given all that - do we have any actual content to show? or are we a single denoter in a stream? + reportHasContent := v.Is(types.VerbosityLevelVeryVerbose) || showTimeline || showSeparateVisibilityAlwaysReportsSection || showSeparateStdSection || report.Failed() || (v.Is(types.VerbosityLevelVerbose) && !report.State.Is(types.SpecStateSkipped)) + + // should we show a runtime? + includeRuntime := !report.State.Is(types.SpecStateSkipped|types.SpecStatePending) || (report.State.Is(types.SpecStateSkipped) && report.Failure.Message != "") + + // should we show the codelocation block? + showCodeLocation := !timelineHasBeenStreaming || !report.State.Is(types.SpecStatePassed) + + switch report.State { + case types.SpecStatePassed: + if report.LeafNodeType.Is(types.NodeTypesForSuiteLevelNodes) && !reportHasContent { + return + } + if report.LeafNodeType.Is(types.NodeTypesForSuiteLevelNodes) { + header = fmt.Sprintf("%s PASSED", header) + } + if report.NumAttempts > 1 && report.MaxFlakeAttempts > 1 { + header, reportHasContent = fmt.Sprintf("%s [FLAKEY TEST - TOOK %d ATTEMPTS TO PASS]", r.retryDenoter, report.NumAttempts), true + } + case types.SpecStatePending: + header = "P" + if v.GT(types.VerbosityLevelSuccinct) { + header, reportHasContent = "P [PENDING]", true + } + case types.SpecStateSkipped: + header = "S" + if v.Is(types.VerbosityLevelVeryVerbose) || (v.Is(types.VerbosityLevelVerbose) && report.Failure.Message != "") { + header, reportHasContent = "S [SKIPPED]", true + } + default: + header = fmt.Sprintf("%s [%s]", header, r.humanReadableState(report.State)) + if report.MaxMustPassRepeatedly > 1 { + header = fmt.Sprintf("%s DURING REPETITION #%d", header, report.NumAttempts) + } + } + + // If we have no content to show, just emit the header and return + if !reportHasContent { + r.emit(r.f(highlightColor + header + "{{/}}")) + if r.conf.ForceNewlines { + r.emit("\n") + } + return + } + + if includeRuntime { + header = r.f("%s [%.3f seconds]", header, report.RunTime.Seconds()) + } + + // Emit header + if !timelineHasBeenStreaming { + r.emitDelimiter(0) + } + r.emitBlock(r.f(highlightColor + header + "{{/}}")) + if showCodeLocation { + r.emitBlock(r.codeLocationBlock(report, highlightColor, v.Is(types.VerbosityLevelVeryVerbose), false)) + } + + //Emit Stdout/Stderr Output + if showSeparateStdSection { + r.wrapTextBlock("Captured StdOut/StdErr Output", func() { + r.emitBlock(r.fi(1, "%s", report.CapturedStdOutErr)) + }) + } + + if showSeparateVisibilityAlwaysReportsSection { + r.wrapTextBlock("Report Entries", func() { + for _, entry := range report.ReportEntries.WithVisibility(types.ReportEntryVisibilityAlways) { + r.emitReportEntry(1, entry) + } + }) + } + + if showTimeline { + r.wrapTextBlock("Timeline", func() { + r.emitTimeline(1, report, timeline) + }) + } + + // Emit Failure Message + if !report.Failure.IsZero() && !v.Is(types.VerbosityLevelVeryVerbose) { + r.emitBlock("\n") + r.emitFailure(1, report.State, report.Failure, true) + if len(report.AdditionalFailures) > 0 { + r.emitBlock(r.fi(1, "\nThere were {{bold}}{{red}}additional failures{{/}} detected. To view them in detail run {{bold}}ginkgo -vv{{/}}")) + } + } + + r.emitDelimiter(0) +} + +func (r *DefaultReporter) highlightColorForState(state types.SpecState) string { + switch state { + case types.SpecStatePassed: + return "{{green}}" + case types.SpecStatePending: + return "{{yellow}}" + case types.SpecStateSkipped: + return "{{cyan}}" + case types.SpecStateFailed: + return "{{red}}" + case types.SpecStateTimedout: + return "{{orange}}" + case types.SpecStatePanicked: + return "{{magenta}}" + case types.SpecStateInterrupted: + return "{{orange}}" + case types.SpecStateAborted: + return "{{coral}}" + default: + return "{{gray}}" + } +} + +func (r *DefaultReporter) humanReadableState(state types.SpecState) string { + return strings.ToUpper(state.String()) +} + +func (r *DefaultReporter) emitTimeline(indent uint, report types.SpecReport, timeline types.Timeline) { + isVeryVerbose := r.conf.Verbosity().Is(types.VerbosityLevelVeryVerbose) + gw := report.CapturedGinkgoWriterOutput + cursor := 0 + for _, entry := range timeline { + tl := entry.GetTimelineLocation() + + end := tl.Offset + if end > len(gw) { + end = len(gw) + } + if end < cursor { + end = cursor + } + if cursor < end && cursor <= len(gw) && end <= len(gw) { + r.emit(r.fi(indent, "%s", gw[cursor:end])) + cursor = end + } else if cursor < len(gw) && end == len(gw) { + r.emit(r.fi(indent, "%s", gw[cursor:])) + cursor = len(gw) + } + + switch x := entry.(type) { + case types.Failure: + if isVeryVerbose { + r.emitFailure(indent, report.State, x, false) + } else { + r.emitShortFailure(indent, report.State, x) + } + case types.AdditionalFailure: + if isVeryVerbose { + r.emitFailure(indent, x.State, x.Failure, true) + } else { + r.emitShortFailure(indent, x.State, x.Failure) + } + case types.ReportEntry: + r.emitReportEntry(indent, x) + case types.ProgressReport: + r.emitProgressReport(indent, false, isVeryVerbose, x) + case types.SpecEvent: + if isVeryVerbose || !x.IsOnlyVisibleAtVeryVerbose() || r.conf.ShowNodeEvents { + r.emitSpecEvent(indent, x, isVeryVerbose) + } + } + } + if cursor < len(gw) { + r.emit(r.fi(indent, "%s", gw[cursor:])) + } +} + +func (r *DefaultReporter) EmitFailure(state types.SpecState, failure types.Failure) { + if r.conf.Verbosity().Is(types.VerbosityLevelVerbose) { + r.emitShortFailure(1, state, failure) + } else if r.conf.Verbosity().Is(types.VerbosityLevelVeryVerbose) { + r.emitFailure(1, state, failure, true) + } +} + +func (r *DefaultReporter) emitShortFailure(indent uint, state types.SpecState, failure types.Failure) { + r.emitBlock(r.fi(indent, r.highlightColorForState(state)+"[%s]{{/}} in [%s] - %s {{gray}}@ %s{{/}}", + r.humanReadableState(state), + failure.FailureNodeType, + failure.Location, + failure.TimelineLocation.Time.Format(types.GINKGO_TIME_FORMAT), + )) +} + +func (r *DefaultReporter) emitFailure(indent uint, state types.SpecState, failure types.Failure, includeAdditionalFailure bool) { + highlightColor := r.highlightColorForState(state) + r.emitBlock(r.fi(indent, highlightColor+"[%s] %s{{/}}", r.humanReadableState(state), failure.Message)) + if r.conf.GithubOutput { + level := "error" + if state.Is(types.SpecStateSkipped) { + level = "notice" + } + r.emitBlock(r.fi(indent, "::%s file=%s,line=%d::%s %s", level, failure.Location.FileName, failure.Location.LineNumber, failure.FailureNodeType, failure.TimelineLocation.Time.Format(types.GINKGO_TIME_FORMAT))) + } else { + r.emitBlock(r.fi(indent, highlightColor+"In {{bold}}[%s]{{/}}"+highlightColor+" at: {{bold}}%s{{/}} {{gray}}@ %s{{/}}\n", failure.FailureNodeType, failure.Location, failure.TimelineLocation.Time.Format(types.GINKGO_TIME_FORMAT))) + } + if failure.ForwardedPanic != "" { + r.emitBlock("\n") + r.emitBlock(r.fi(indent, highlightColor+"%s{{/}}", failure.ForwardedPanic)) + } + + if r.conf.FullTrace || failure.ForwardedPanic != "" { + r.emitBlock("\n") + r.emitBlock(r.fi(indent, highlightColor+"Full Stack Trace{{/}}")) + r.emitBlock(r.fi(indent+1, "%s", failure.Location.FullStackTrace)) + } + + if !failure.ProgressReport.IsZero() { + r.emitBlock("\n") + r.emitProgressReport(indent, false, false, failure.ProgressReport) + } + + if failure.AdditionalFailure != nil && includeAdditionalFailure { + r.emitBlock("\n") + r.emitFailure(indent, failure.AdditionalFailure.State, failure.AdditionalFailure.Failure, true) + } +} + +func (r *DefaultReporter) EmitProgressReport(report types.ProgressReport) { + r.emitDelimiter(1) + + if report.RunningInParallel { + r.emit(r.fi(1, "{{coral}}Progress Report for Ginkgo Process #{{bold}}%d{{/}}\n", report.ParallelProcess)) + } + shouldEmitGW := report.RunningInParallel || r.conf.Verbosity().LT(types.VerbosityLevelVerbose) + r.emitProgressReport(1, shouldEmitGW, true, report) + r.emitDelimiter(1) +} + +func (r *DefaultReporter) emitProgressReport(indent uint, emitGinkgoWriterOutput, emitGroup bool, report types.ProgressReport) { + if report.Message != "" { + r.emitBlock(r.fi(indent, report.Message+"\n")) + indent += 1 + } + if report.LeafNodeText != "" { + subjectIndent := indent + if len(report.ContainerHierarchyTexts) > 0 { + r.emit(r.fi(indent, r.cycleJoin(report.ContainerHierarchyTexts, " "))) + r.emit(" ") + subjectIndent = 0 + } + r.emit(r.fi(subjectIndent, "{{bold}}{{orange}}%s{{/}} (Spec Runtime: %s)\n", report.LeafNodeText, report.Time().Sub(report.SpecStartTime).Round(time.Millisecond))) + r.emit(r.fi(indent+1, "{{gray}}%s{{/}}\n", report.LeafNodeLocation)) + indent += 1 + } + if report.CurrentNodeType != types.NodeTypeInvalid { + r.emit(r.fi(indent, "In {{bold}}{{orange}}[%s]{{/}}", report.CurrentNodeType)) + if report.CurrentNodeText != "" && !report.CurrentNodeType.Is(types.NodeTypeIt) { + r.emit(r.f(" {{bold}}{{orange}}%s{{/}}", report.CurrentNodeText)) + } + + r.emit(r.f(" (Node Runtime: %s)\n", report.Time().Sub(report.CurrentNodeStartTime).Round(time.Millisecond))) + r.emit(r.fi(indent+1, "{{gray}}%s{{/}}\n", report.CurrentNodeLocation)) + indent += 1 + } + if report.CurrentStepText != "" { + r.emit(r.fi(indent, "At {{bold}}{{orange}}[By Step] %s{{/}} (Step Runtime: %s)\n", report.CurrentStepText, report.Time().Sub(report.CurrentStepStartTime).Round(time.Millisecond))) + r.emit(r.fi(indent+1, "{{gray}}%s{{/}}\n", report.CurrentStepLocation)) + indent += 1 + } + + if indent > 0 { + indent -= 1 + } + + if r.conf.GithubOutput && emitGroup { + r.emitBlock(r.fi(indent, "::group::Progress Report")) + } + + if emitGinkgoWriterOutput && report.CapturedGinkgoWriterOutput != "" { + r.emit("\n") + r.emitBlock(r.fi(indent, "{{gray}}Begin Captured GinkgoWriter Output >>{{/}}")) + limit, lines := 10, strings.Split(report.CapturedGinkgoWriterOutput, "\n") + if len(lines) <= limit { + r.emitBlock(r.fi(indent+1, "%s", report.CapturedGinkgoWriterOutput)) + } else { + r.emitBlock(r.fi(indent+1, "{{gray}}...{{/}}")) + for _, line := range lines[len(lines)-limit-1:] { + r.emitBlock(r.fi(indent+1, "%s", line)) + } + } + r.emitBlock(r.fi(indent, "{{gray}}<< End Captured GinkgoWriter Output{{/}}")) + } + + if !report.SpecGoroutine().IsZero() { + r.emit("\n") + r.emit(r.fi(indent, "{{bold}}{{underline}}Spec Goroutine{{/}}\n")) + r.emitGoroutines(indent, report.SpecGoroutine()) + } + + if len(report.AdditionalReports) > 0 { + r.emit("\n") + r.emitBlock(r.fi(indent, "{{gray}}Begin Additional Progress Reports >>{{/}}")) + for i, additionalReport := range report.AdditionalReports { + r.emit(r.fi(indent+1, additionalReport)) + if i < len(report.AdditionalReports)-1 { + r.emitBlock(r.fi(indent+1, "{{gray}}%s{{/}}", strings.Repeat("-", 10))) + } + } + r.emitBlock(r.fi(indent, "{{gray}}<< End Additional Progress Reports{{/}}")) + } + + highlightedGoroutines := report.HighlightedGoroutines() + if len(highlightedGoroutines) > 0 { + r.emit("\n") + r.emit(r.fi(indent, "{{bold}}{{underline}}Goroutines of Interest{{/}}\n")) + r.emitGoroutines(indent, highlightedGoroutines...) + } + + otherGoroutines := report.OtherGoroutines() + if len(otherGoroutines) > 0 { + r.emit("\n") + r.emit(r.fi(indent, "{{gray}}{{bold}}{{underline}}Other Goroutines{{/}}\n")) + r.emitGoroutines(indent, otherGoroutines...) + } + + if r.conf.GithubOutput && emitGroup { + r.emitBlock(r.fi(indent, "::endgroup::")) + } +} + +func (r *DefaultReporter) EmitReportEntry(entry types.ReportEntry) { + if r.conf.Verbosity().LT(types.VerbosityLevelVerbose) || entry.Visibility == types.ReportEntryVisibilityNever { + return + } + r.emitReportEntry(1, entry) +} + +func (r *DefaultReporter) emitReportEntry(indent uint, entry types.ReportEntry) { + r.emitBlock(r.fi(indent, "{{bold}}"+entry.Name+"{{gray}} "+fmt.Sprintf("- %s @ %s{{/}}", entry.Location, entry.Time.Format(types.GINKGO_TIME_FORMAT)))) + if representation := entry.StringRepresentation(); representation != "" { + r.emitBlock(r.fi(indent+1, representation)) + } +} + +func (r *DefaultReporter) EmitSpecEvent(event types.SpecEvent) { + v := r.conf.Verbosity() + if v.Is(types.VerbosityLevelVeryVerbose) || (v.Is(types.VerbosityLevelVerbose) && (r.conf.ShowNodeEvents || !event.IsOnlyVisibleAtVeryVerbose())) { + r.emitSpecEvent(1, event, r.conf.Verbosity().Is(types.VerbosityLevelVeryVerbose)) + } +} + +func (r *DefaultReporter) emitSpecEvent(indent uint, event types.SpecEvent, includeLocation bool) { + location := "" + if includeLocation { + location = fmt.Sprintf("- %s ", event.CodeLocation.String()) + } + switch event.SpecEventType { + case types.SpecEventInvalid: + return + case types.SpecEventByStart: + r.emitBlock(r.fi(indent, "{{bold}}STEP:{{/}} %s {{gray}}%s@ %s{{/}}", event.Message, location, event.TimelineLocation.Time.Format(types.GINKGO_TIME_FORMAT))) + case types.SpecEventByEnd: + r.emitBlock(r.fi(indent, "{{bold}}END STEP:{{/}} %s {{gray}}%s@ %s (%s){{/}}", event.Message, location, event.TimelineLocation.Time.Format(types.GINKGO_TIME_FORMAT), event.Duration.Round(time.Millisecond))) + case types.SpecEventNodeStart: + r.emitBlock(r.fi(indent, "> Enter {{bold}}[%s]{{/}} %s {{gray}}%s@ %s{{/}}", event.NodeType.String(), event.Message, location, event.TimelineLocation.Time.Format(types.GINKGO_TIME_FORMAT))) + case types.SpecEventNodeEnd: + r.emitBlock(r.fi(indent, "< Exit {{bold}}[%s]{{/}} %s {{gray}}%s@ %s (%s){{/}}", event.NodeType.String(), event.Message, location, event.TimelineLocation.Time.Format(types.GINKGO_TIME_FORMAT), event.Duration.Round(time.Millisecond))) + case types.SpecEventSpecRepeat: + r.emitBlock(r.fi(indent, "\n{{bold}}Attempt #%d {{green}}Passed{{/}}{{bold}}. Repeating %s{{/}} {{gray}}@ %s{{/}}\n\n", event.Attempt, r.retryDenoter, event.TimelineLocation.Time.Format(types.GINKGO_TIME_FORMAT))) + case types.SpecEventSpecRetry: + r.emitBlock(r.fi(indent, "\n{{bold}}Attempt #%d {{red}}Failed{{/}}{{bold}}. Retrying %s{{/}} {{gray}}@ %s{{/}}\n\n", event.Attempt, r.retryDenoter, event.TimelineLocation.Time.Format(types.GINKGO_TIME_FORMAT))) + } +} + +func (r *DefaultReporter) emitGoroutines(indent uint, goroutines ...types.Goroutine) { + for idx, g := range goroutines { + color := "{{gray}}" + if g.HasHighlights() { + color = "{{orange}}" + } + r.emit(r.fi(indent, color+"goroutine %d [%s]{{/}}\n", g.ID, g.State)) + for _, fc := range g.Stack { + if fc.Highlight { + r.emit(r.fi(indent, color+"{{bold}}> %s{{/}}\n", fc.Function)) + r.emit(r.fi(indent+2, color+"{{bold}}%s:%d{{/}}\n", fc.Filename, fc.Line)) + r.emitSource(indent+3, fc) + } else { + r.emit(r.fi(indent+1, "{{gray}}%s{{/}}\n", fc.Function)) + r.emit(r.fi(indent+2, "{{gray}}%s:%d{{/}}\n", fc.Filename, fc.Line)) + } + } + + if idx+1 < len(goroutines) { + r.emit("\n") + } + } +} + +func (r *DefaultReporter) emitSource(indent uint, fc types.FunctionCall) { + lines := fc.Source + if len(lines) == 0 { + return + } + + lTrim := 100000 + for _, line := range lines { + lTrimLine := len(line) - len(strings.TrimLeft(line, " \t")) + if lTrimLine < lTrim && len(line) > 0 { + lTrim = lTrimLine + } + } + if lTrim == 100000 { + lTrim = 0 + } + + for idx, line := range lines { + if len(line) > lTrim { + line = line[lTrim:] + } + if idx == fc.SourceHighlight { + r.emit(r.fi(indent, "{{bold}}{{orange}}> %s{{/}}\n", line)) + } else { + r.emit(r.fi(indent, "| %s\n", line)) + } + } +} + +/* Emitting to the writer */ +func (r *DefaultReporter) emit(s string) { + r._emit(s, false, false) +} + +func (r *DefaultReporter) emitBlock(s string) { + r._emit(s, true, false) +} + +func (r *DefaultReporter) emitDelimiter(indent uint) { + r._emit(r.fi(indent, "{{gray}}%s{{/}}", strings.Repeat("-", 30)), true, true) +} + +// a bit ugly - but we're trying to minimize locking on this hot codepath +func (r *DefaultReporter) _emit(s string, block bool, isDelimiter bool) { + if len(s) == 0 { + return + } + r.lock.Lock() + defer r.lock.Unlock() + if isDelimiter && r.lastEmissionWasDelimiter { + return + } + if block && !r.lastCharWasNewline { + r.writer.Write([]byte("\n")) + } + r.lastCharWasNewline = (s[len(s)-1:] == "\n") + r.writer.Write([]byte(s)) + if block && !r.lastCharWasNewline { + r.writer.Write([]byte("\n")) + r.lastCharWasNewline = true + } + r.lastEmissionWasDelimiter = isDelimiter +} + +/* Rendering text */ +func (r *DefaultReporter) f(format string, args ...any) string { + return r.formatter.F(format, args...) +} + +func (r *DefaultReporter) fi(indentation uint, format string, args ...any) string { + return r.formatter.Fi(indentation, format, args...) +} + +func (r *DefaultReporter) cycleJoin(elements []string, joiner string) string { + return r.formatter.CycleJoin(elements, joiner, []string{"{{/}}", "{{gray}}"}) +} + +func (r *DefaultReporter) codeLocationBlock(report types.SpecReport, highlightColor string, veryVerbose bool, usePreciseFailureLocation bool) string { + texts, locations, labels, semVerConstraints := []string{}, []types.CodeLocation{}, [][]string{}, [][]string{} + texts, locations, labels, semVerConstraints = append(texts, report.ContainerHierarchyTexts...), append(locations, report.ContainerHierarchyLocations...), append(labels, report.ContainerHierarchyLabels...), append(semVerConstraints, report.ContainerHierarchySemVerConstraints...) + + if report.LeafNodeType.Is(types.NodeTypesForSuiteLevelNodes) { + texts = append(texts, r.f("[%s] %s", report.LeafNodeType, report.LeafNodeText)) + } else { + texts = append(texts, r.f(report.LeafNodeText)) + } + labels = append(labels, report.LeafNodeLabels) + semVerConstraints = append(semVerConstraints, report.LeafNodeSemVerConstraints) + locations = append(locations, report.LeafNodeLocation) + + failureLocation := report.Failure.FailureNodeLocation + if usePreciseFailureLocation { + failureLocation = report.Failure.Location + } + + highlightIndex := -1 + switch report.Failure.FailureNodeContext { + case types.FailureNodeAtTopLevel: + texts = append([]string{fmt.Sprintf("TOP-LEVEL [%s]", report.Failure.FailureNodeType)}, texts...) + locations = append([]types.CodeLocation{failureLocation}, locations...) + labels = append([][]string{{}}, labels...) + semVerConstraints = append([][]string{{}}, semVerConstraints...) + highlightIndex = 0 + case types.FailureNodeInContainer: + i := report.Failure.FailureNodeContainerIndex + texts[i] = fmt.Sprintf("%s [%s]", texts[i], report.Failure.FailureNodeType) + locations[i] = failureLocation + highlightIndex = i + case types.FailureNodeIsLeafNode: + i := len(texts) - 1 + texts[i] = fmt.Sprintf("[%s] %s", report.LeafNodeType, report.LeafNodeText) + locations[i] = failureLocation + highlightIndex = i + default: + //there is no failure, so we highlight the leaf ndoe + highlightIndex = len(texts) - 1 + } + + out := "" + if veryVerbose { + for i := range texts { + if i == highlightIndex { + out += r.fi(uint(i), highlightColor+"{{bold}}%s{{/}}", texts[i]) + } else { + out += r.fi(uint(i), "%s", texts[i]) + } + if len(labels[i]) > 0 { + out += r.f(" {{coral}}[%s]{{/}}", strings.Join(labels[i], ", ")) + } + if len(semVerConstraints[i]) > 0 { + out += r.f(" {{coral}}[%s]{{/}}", strings.Join(semVerConstraints[i], ", ")) + } + out += "\n" + out += r.fi(uint(i), "{{gray}}%s{{/}}\n", locations[i]) + } + } else { + for i := range texts { + style := "{{/}}" + if i%2 == 1 { + style = "{{gray}}" + } + if i == highlightIndex { + style = highlightColor + "{{bold}}" + } + out += r.f(style+"%s", texts[i]) + if i < len(texts)-1 { + out += " " + } else { + out += r.f("{{/}}") + } + } + flattenedLabels := report.Labels() + if len(flattenedLabels) > 0 { + out += r.f(" {{coral}}[%s]{{/}}", strings.Join(flattenedLabels, ", ")) + } + flattenedSemVerConstraints := report.SemVerConstraints() + if len(flattenedSemVerConstraints) > 0 { + out += r.f(" {{coral}}[%s]{{/}}", strings.Join(flattenedSemVerConstraints, ", ")) + } + out += "\n" + if usePreciseFailureLocation { + out += r.f("{{gray}}%s{{/}}", failureLocation) + } else { + leafLocation := locations[len(locations)-1] + if (report.Failure.FailureNodeLocation != types.CodeLocation{}) && (report.Failure.FailureNodeLocation != leafLocation) { + out += r.fi(1, highlightColor+"[%s]{{/}} {{gray}}%s{{/}}\n", report.Failure.FailureNodeType, report.Failure.FailureNodeLocation) + out += r.fi(1, "{{gray}}[%s] %s{{/}}", report.LeafNodeType, leafLocation) + } else { + out += r.f("{{gray}}%s{{/}}", leafLocation) + } + } + + } + return out +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/reporters/deprecated_reporter.go b/backend/vendor/github.com/onsi/ginkgo/v2/reporters/deprecated_reporter.go new file mode 100644 index 0000000..613072e --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/reporters/deprecated_reporter.go @@ -0,0 +1,149 @@ +package reporters + +import ( + "github.com/onsi/ginkgo/v2/config" + "github.com/onsi/ginkgo/v2/types" +) + +// Deprecated: DeprecatedReporter was how Ginkgo V1 provided support for CustomReporters +// this has been removed in V2. +// Please read the documentation at: +// https://onsi.github.io/ginkgo/MIGRATING_TO_V2#removed-custom-reporters +// for Ginkgo's new behavior and for a migration path. +type DeprecatedReporter interface { + SuiteWillBegin(config config.GinkgoConfigType, summary *types.SuiteSummary) + BeforeSuiteDidRun(setupSummary *types.SetupSummary) + SpecWillRun(specSummary *types.SpecSummary) + SpecDidComplete(specSummary *types.SpecSummary) + AfterSuiteDidRun(setupSummary *types.SetupSummary) + SuiteDidEnd(summary *types.SuiteSummary) +} + +// ReportViaDeprecatedReporter takes a V1 custom reporter and a V2 report and +// calls the custom reporter's methods with appropriately transformed data from the V2 report. +// +// ReportViaDeprecatedReporter should be called in a `ReportAfterSuite()` +// +// Deprecated: ReportViaDeprecatedReporter method exists to help developer bridge between deprecated V1 functionality and the new +// reporting support in V2. It will be removed in a future minor version of Ginkgo. +func ReportViaDeprecatedReporter(reporter DeprecatedReporter, report types.Report) { + conf := config.DeprecatedGinkgoConfigType{ + RandomSeed: report.SuiteConfig.RandomSeed, + RandomizeAllSpecs: report.SuiteConfig.RandomizeAllSpecs, + FocusStrings: report.SuiteConfig.FocusStrings, + SkipStrings: report.SuiteConfig.SkipStrings, + FailOnPending: report.SuiteConfig.FailOnPending, + FailFast: report.SuiteConfig.FailFast, + FlakeAttempts: report.SuiteConfig.FlakeAttempts, + EmitSpecProgress: false, + DryRun: report.SuiteConfig.DryRun, + ParallelNode: report.SuiteConfig.ParallelProcess, + ParallelTotal: report.SuiteConfig.ParallelTotal, + SyncHost: report.SuiteConfig.ParallelHost, + StreamHost: report.SuiteConfig.ParallelHost, + } + + summary := &types.DeprecatedSuiteSummary{ + SuiteDescription: report.SuiteDescription, + SuiteID: report.SuitePath, + + NumberOfSpecsBeforeParallelization: report.PreRunStats.TotalSpecs, + NumberOfTotalSpecs: report.PreRunStats.TotalSpecs, + NumberOfSpecsThatWillBeRun: report.PreRunStats.SpecsThatWillRun, + } + + reporter.SuiteWillBegin(conf, summary) + + for _, spec := range report.SpecReports { + switch spec.LeafNodeType { + case types.NodeTypeBeforeSuite, types.NodeTypeSynchronizedBeforeSuite: + setupSummary := &types.DeprecatedSetupSummary{ + ComponentType: spec.LeafNodeType, + CodeLocation: spec.LeafNodeLocation, + State: spec.State, + RunTime: spec.RunTime, + Failure: failureFor(spec), + CapturedOutput: spec.CombinedOutput(), + SuiteID: report.SuitePath, + } + reporter.BeforeSuiteDidRun(setupSummary) + case types.NodeTypeAfterSuite, types.NodeTypeSynchronizedAfterSuite: + setupSummary := &types.DeprecatedSetupSummary{ + ComponentType: spec.LeafNodeType, + CodeLocation: spec.LeafNodeLocation, + State: spec.State, + RunTime: spec.RunTime, + Failure: failureFor(spec), + CapturedOutput: spec.CombinedOutput(), + SuiteID: report.SuitePath, + } + reporter.AfterSuiteDidRun(setupSummary) + case types.NodeTypeIt: + componentTexts, componentCodeLocations := []string{}, []types.CodeLocation{} + componentTexts = append(componentTexts, spec.ContainerHierarchyTexts...) + componentCodeLocations = append(componentCodeLocations, spec.ContainerHierarchyLocations...) + componentTexts = append(componentTexts, spec.LeafNodeText) + componentCodeLocations = append(componentCodeLocations, spec.LeafNodeLocation) + + specSummary := &types.DeprecatedSpecSummary{ + ComponentTexts: componentTexts, + ComponentCodeLocations: componentCodeLocations, + State: spec.State, + RunTime: spec.RunTime, + Failure: failureFor(spec), + NumberOfSamples: spec.NumAttempts, + CapturedOutput: spec.CombinedOutput(), + SuiteID: report.SuitePath, + } + reporter.SpecWillRun(specSummary) + reporter.SpecDidComplete(specSummary) + + switch spec.State { + case types.SpecStatePending: + summary.NumberOfPendingSpecs += 1 + case types.SpecStateSkipped: + summary.NumberOfSkippedSpecs += 1 + case types.SpecStateFailed, types.SpecStatePanicked, types.SpecStateInterrupted: + summary.NumberOfFailedSpecs += 1 + case types.SpecStatePassed: + summary.NumberOfPassedSpecs += 1 + if spec.NumAttempts > 1 { + summary.NumberOfFlakedSpecs += 1 + } + } + } + } + + summary.SuiteSucceeded = report.SuiteSucceeded + summary.RunTime = report.RunTime + + reporter.SuiteDidEnd(summary) +} + +func failureFor(spec types.SpecReport) types.DeprecatedSpecFailure { + if spec.Failure.IsZero() { + return types.DeprecatedSpecFailure{} + } + + index := 0 + switch spec.Failure.FailureNodeContext { + case types.FailureNodeInContainer: + index = spec.Failure.FailureNodeContainerIndex + case types.FailureNodeAtTopLevel: + index = -1 + case types.FailureNodeIsLeafNode: + index = len(spec.ContainerHierarchyTexts) - 1 + if spec.LeafNodeText != "" { + index += 1 + } + } + + return types.DeprecatedSpecFailure{ + Message: spec.Failure.Message, + Location: spec.Failure.Location, + ForwardedPanic: spec.Failure.ForwardedPanic, + ComponentIndex: index, + ComponentType: spec.Failure.FailureNodeType, + ComponentCodeLocation: spec.Failure.FailureNodeLocation, + } +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/reporters/gojson_report.go b/backend/vendor/github.com/onsi/ginkgo/v2/reporters/gojson_report.go new file mode 100644 index 0000000..d02fb7a --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/reporters/gojson_report.go @@ -0,0 +1,61 @@ +package reporters + +import ( + "encoding/json" + "fmt" + "os" + "path" + + "github.com/onsi/ginkgo/v2/internal/reporters" + "github.com/onsi/ginkgo/v2/types" +) + +// GenerateGoTestJSONReport produces a JSON-formatted in the test2json format used by `go test -json` +func GenerateGoTestJSONReport(report types.Report, destination string) error { + // walk report and generate test2json-compatible objects + // JSON-encode the objects into filename + if err := os.MkdirAll(path.Dir(destination), 0770); err != nil { + return err + } + f, err := os.Create(destination) + if err != nil { + return err + } + defer f.Close() + enc := json.NewEncoder(f) + r := reporters.NewGoJSONReporter( + enc, + systemErrForUnstructuredReporters, + systemOutForUnstructuredReporters, + ) + return r.Write(report) +} + +// MergeJSONReports produces a single JSON-formatted report at the passed in destination by merging the JSON-formatted reports provided in sources +// It skips over reports that fail to decode but reports on them via the returned messages []string +func MergeAndCleanupGoTestJSONReports(sources []string, destination string) ([]string, error) { + messages := []string{} + if err := os.MkdirAll(path.Dir(destination), 0770); err != nil { + return messages, err + } + f, err := os.Create(destination) + if err != nil { + return messages, err + } + defer f.Close() + + for _, source := range sources { + data, err := os.ReadFile(source) + if err != nil { + messages = append(messages, fmt.Sprintf("Could not open %s:\n%s", source, err.Error())) + continue + } + _, err = f.Write(data) + if err != nil { + messages = append(messages, fmt.Sprintf("Could not write to %s:\n%s", destination, err.Error())) + continue + } + os.Remove(source) + } + return messages, nil +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/reporters/json_report.go b/backend/vendor/github.com/onsi/ginkgo/v2/reporters/json_report.go new file mode 100644 index 0000000..5d3e8db --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/reporters/json_report.go @@ -0,0 +1,69 @@ +package reporters + +import ( + "encoding/json" + "fmt" + "os" + "path" + + "github.com/onsi/ginkgo/v2/types" +) + +// GenerateJSONReport produces a JSON-formatted report at the passed in destination +func GenerateJSONReport(report types.Report, destination string) error { + if err := os.MkdirAll(path.Dir(destination), 0770); err != nil { + return err + } + f, err := os.Create(destination) + if err != nil { + return err + } + defer f.Close() + enc := json.NewEncoder(f) + enc.SetIndent("", " ") + err = enc.Encode([]types.Report{ + report, + }) + if err != nil { + return err + } + return nil +} + +// MergeJSONReports produces a single JSON-formatted report at the passed in destination by merging the JSON-formatted reports provided in sources +// It skips over reports that fail to decode but reports on them via the returned messages []string +func MergeAndCleanupJSONReports(sources []string, destination string) ([]string, error) { + messages := []string{} + allReports := []types.Report{} + for _, source := range sources { + reports := []types.Report{} + data, err := os.ReadFile(source) + if err != nil { + messages = append(messages, fmt.Sprintf("Could not open %s:\n%s", source, err.Error())) + continue + } + err = json.Unmarshal(data, &reports) + if err != nil { + messages = append(messages, fmt.Sprintf("Could not decode %s:\n%s", source, err.Error())) + continue + } + os.Remove(source) + allReports = append(allReports, reports...) + } + + if err := os.MkdirAll(path.Dir(destination), 0770); err != nil { + return messages, err + } + f, err := os.Create(destination) + if err != nil { + return messages, err + } + defer f.Close() + enc := json.NewEncoder(f) + enc.SetIndent("", " ") + err = enc.Encode(allReports) + if err != nil { + return messages, err + } + return messages, nil +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/reporters/junit_report.go b/backend/vendor/github.com/onsi/ginkgo/v2/reporters/junit_report.go new file mode 100644 index 0000000..828f893 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/reporters/junit_report.go @@ -0,0 +1,399 @@ +/* + +JUnit XML Reporter for Ginkgo + +For usage instructions: http://onsi.github.io/ginkgo/#generating_junit_xml_output + +The schema used for the generated JUnit xml file was adapted from https://llg.cubic.org/docs/junit/ + +*/ + +package reporters + +import ( + "encoding/xml" + "fmt" + "os" + "path" + "regexp" + "strings" + + "github.com/onsi/ginkgo/v2/config" + "github.com/onsi/ginkgo/v2/types" +) + +type JunitReportConfig struct { + // Spec States for which no timeline should be emitted for system-err + // set this to types.SpecStatePassed|types.SpecStateSkipped|types.SpecStatePending to only match failing specs + OmitTimelinesForSpecState types.SpecState + + // Enable OmitFailureMessageAttr to prevent failure messages appearing in the "message" attribute of the Failure and Error tags + OmitFailureMessageAttr bool + + //Enable OmitCapturedStdOutErr to prevent captured stdout/stderr appearing in system-out + OmitCapturedStdOutErr bool + + // Enable OmitSpecLabels to prevent labels from appearing in the spec name + OmitSpecLabels bool + + // Enable OmitSpecSemVerConstraints to prevent semantic version constraints from appearing in the spec name + OmitSpecSemVerConstraints bool + + // Enable OmitLeafNodeType to prevent the spec leaf node type from appearing in the spec name + OmitLeafNodeType bool + + // Enable OmitSuiteSetupNodes to prevent the creation of testcase entries for setup nodes + OmitSuiteSetupNodes bool +} + +type JUnitTestSuites struct { + XMLName xml.Name `xml:"testsuites"` + // Tests maps onto the total number of specs in all test suites (this includes any suite nodes such as BeforeSuite) + Tests int `xml:"tests,attr"` + // Disabled maps onto specs that are pending and/or skipped + Disabled int `xml:"disabled,attr"` + // Errors maps onto specs that panicked or were interrupted + Errors int `xml:"errors,attr"` + // Failures maps onto specs that failed + Failures int `xml:"failures,attr"` + // Time is the time in seconds to execute all test suites + Time float64 `xml:"time,attr"` + + //The set of all test suites + TestSuites []JUnitTestSuite `xml:"testsuite"` +} + +type JUnitTestSuite struct { + // Name maps onto the description of the test suite - maps onto Report.SuiteDescription + Name string `xml:"name,attr"` + // Package maps onto the absolute path to the test suite - maps onto Report.SuitePath + Package string `xml:"package,attr"` + // Tests maps onto the total number of specs in the test suite (this includes any suite nodes such as BeforeSuite) + Tests int `xml:"tests,attr"` + // Disabled maps onto specs that are pending + Disabled int `xml:"disabled,attr"` + // Skiped maps onto specs that are skipped + Skipped int `xml:"skipped,attr"` + // Errors maps onto specs that panicked or were interrupted + Errors int `xml:"errors,attr"` + // Failures maps onto specs that failed + Failures int `xml:"failures,attr"` + // Time is the time in seconds to execute all the test suite - maps onto Report.RunTime + Time float64 `xml:"time,attr"` + // Timestamp is the ISO 8601 formatted start-time of the suite - maps onto Report.StartTime + Timestamp string `xml:"timestamp,attr"` + + //Properties captures the information stored in the rest of the Report type (including SuiteConfig) as key-value pairs + Properties JUnitProperties `xml:"properties"` + + //TestCases capture the individual specs + TestCases []JUnitTestCase `xml:"testcase"` +} + +type JUnitProperties struct { + Properties []JUnitProperty `xml:"property"` +} + +func (jup JUnitProperties) WithName(name string) string { + for _, property := range jup.Properties { + if property.Name == name { + return property.Value + } + } + return "" +} + +type JUnitProperty struct { + Name string `xml:"name,attr"` + Value string `xml:"value,attr"` +} + +var ownerRE = regexp.MustCompile(`(?i)^owner:(.*)$`) + +type JUnitTestCase struct { + // Name maps onto the full text of the spec - equivalent to "[SpecReport.LeafNodeType] SpecReport.FullText()" + Name string `xml:"name,attr"` + // Classname maps onto the name of the test suite - equivalent to Report.SuiteDescription + Classname string `xml:"classname,attr"` + // Status maps onto the string representation of SpecReport.State + Status string `xml:"status,attr"` + // Time is the time in seconds to execute the spec - maps onto SpecReport.RunTime + Time float64 `xml:"time,attr"` + // Owner is the owner the spec - is set if a label matching Label("owner:X") is provided. The last matching label is used as the owner, thereby allowing specs to override owners specified in container nodes. + Owner string `xml:"owner,attr,omitempty"` + //Skipped is populated with a message if the test was skipped or pending + Skipped *JUnitSkipped `xml:"skipped,omitempty"` + //Error is populated if the test panicked or was interrupted + Error *JUnitError `xml:"error,omitempty"` + //Failure is populated if the test failed + Failure *JUnitFailure `xml:"failure,omitempty"` + //SystemOut maps onto any captured stdout/stderr output - maps onto SpecReport.CapturedStdOutErr + SystemOut string `xml:"system-out,omitempty"` + //SystemOut maps onto any captured GinkgoWriter output - maps onto SpecReport.CapturedGinkgoWriterOutput + SystemErr string `xml:"system-err,omitempty"` +} + +type JUnitSkipped struct { + // Message maps onto "pending" if the test was marked pending, "skipped" if the test was marked skipped, and "skipped - REASON" if the user called Skip(REASON) + Message string `xml:"message,attr"` +} + +type JUnitError struct { + //Message maps onto the panic/exception thrown - equivalent to SpecReport.Failure.ForwardedPanic - or to "interrupted" + Message string `xml:"message,attr"` + //Type is one of "panicked" or "interrupted" + Type string `xml:"type,attr"` + //Description maps onto the captured stack trace for a panic, or the failure message for an interrupt which will include the dump of running goroutines + Description string `xml:",chardata"` +} + +type JUnitFailure struct { + //Message maps onto the failure message - equivalent to SpecReport.Failure.Message + Message string `xml:"message,attr"` + //Type is "failed" + Type string `xml:"type,attr"` + //Description maps onto the location and stack trace of the failure + Description string `xml:",chardata"` +} + +func GenerateJUnitReport(report types.Report, dst string) error { + return GenerateJUnitReportWithConfig(report, dst, JunitReportConfig{}) +} + +func GenerateJUnitReportWithConfig(report types.Report, dst string, config JunitReportConfig) error { + suite := JUnitTestSuite{ + Name: report.SuiteDescription, + Package: report.SuitePath, + Time: report.RunTime.Seconds(), + Timestamp: report.StartTime.Format("2006-01-02T15:04:05"), + Properties: JUnitProperties{ + Properties: []JUnitProperty{ + {"SuiteSucceeded", fmt.Sprintf("%t", report.SuiteSucceeded)}, + {"SuiteHasProgrammaticFocus", fmt.Sprintf("%t", report.SuiteHasProgrammaticFocus)}, + {"SpecialSuiteFailureReason", strings.Join(report.SpecialSuiteFailureReasons, ",")}, + {"SuiteLabels", fmt.Sprintf("[%s]", strings.Join(report.SuiteLabels, ","))}, + {"SuiteSemVerConstraints", fmt.Sprintf("[%s]", strings.Join(report.SuiteSemVerConstraints, ","))}, + {"RandomSeed", fmt.Sprintf("%d", report.SuiteConfig.RandomSeed)}, + {"RandomizeAllSpecs", fmt.Sprintf("%t", report.SuiteConfig.RandomizeAllSpecs)}, + {"LabelFilter", report.SuiteConfig.LabelFilter}, + {"SemVerFilter", report.SuiteConfig.SemVerFilter}, + {"FocusStrings", strings.Join(report.SuiteConfig.FocusStrings, ",")}, + {"SkipStrings", strings.Join(report.SuiteConfig.SkipStrings, ",")}, + {"FocusFiles", strings.Join(report.SuiteConfig.FocusFiles, ";")}, + {"SkipFiles", strings.Join(report.SuiteConfig.SkipFiles, ";")}, + {"FailOnPending", fmt.Sprintf("%t", report.SuiteConfig.FailOnPending)}, + {"FailOnEmpty", fmt.Sprintf("%t", report.SuiteConfig.FailOnEmpty)}, + {"FailFast", fmt.Sprintf("%t", report.SuiteConfig.FailFast)}, + {"FlakeAttempts", fmt.Sprintf("%d", report.SuiteConfig.FlakeAttempts)}, + {"DryRun", fmt.Sprintf("%t", report.SuiteConfig.DryRun)}, + {"ParallelTotal", fmt.Sprintf("%d", report.SuiteConfig.ParallelTotal)}, + {"OutputInterceptorMode", report.SuiteConfig.OutputInterceptorMode}, + }, + }, + } + for _, spec := range report.SpecReports { + if config.OmitSuiteSetupNodes && spec.LeafNodeType != types.NodeTypeIt { + continue + } + name := fmt.Sprintf("[%s]", spec.LeafNodeType) + if config.OmitLeafNodeType { + name = "" + } + if spec.FullText() != "" { + name = name + " " + spec.FullText() + } + labels := spec.Labels() + if len(labels) > 0 && !config.OmitSpecLabels { + name = name + " [" + strings.Join(labels, ", ") + "]" + } + owner := "" + for _, label := range labels { + if matches := ownerRE.FindStringSubmatch(label); len(matches) == 2 { + owner = matches[1] + } + } + semVerConstraints := spec.SemVerConstraints() + if len(semVerConstraints) > 0 && !config.OmitSpecSemVerConstraints { + name = name + " [" + strings.Join(semVerConstraints, ", ") + "]" + } + name = strings.TrimSpace(name) + + test := JUnitTestCase{ + Name: name, + Classname: report.SuiteDescription, + Status: spec.State.String(), + Time: spec.RunTime.Seconds(), + Owner: owner, + } + if !spec.State.Is(config.OmitTimelinesForSpecState) { + test.SystemErr = systemErrForUnstructuredReporters(spec) + } + if !config.OmitCapturedStdOutErr { + test.SystemOut = systemOutForUnstructuredReporters(spec) + } + suite.Tests += 1 + + switch spec.State { + case types.SpecStateSkipped: + message := "skipped" + if spec.Failure.Message != "" { + message += " - " + spec.Failure.Message + } + test.Skipped = &JUnitSkipped{Message: message} + suite.Skipped += 1 + case types.SpecStatePending: + test.Skipped = &JUnitSkipped{Message: "pending"} + suite.Disabled += 1 + case types.SpecStateFailed: + test.Failure = &JUnitFailure{ + Message: spec.Failure.Message, + Type: "failed", + Description: failureDescriptionForUnstructuredReporters(spec), + } + if config.OmitFailureMessageAttr { + test.Failure.Message = "" + } + suite.Failures += 1 + case types.SpecStateTimedout: + test.Failure = &JUnitFailure{ + Message: spec.Failure.Message, + Type: "timedout", + Description: failureDescriptionForUnstructuredReporters(spec), + } + if config.OmitFailureMessageAttr { + test.Failure.Message = "" + } + suite.Failures += 1 + case types.SpecStateInterrupted: + test.Error = &JUnitError{ + Message: spec.Failure.Message, + Type: "interrupted", + Description: failureDescriptionForUnstructuredReporters(spec), + } + if config.OmitFailureMessageAttr { + test.Error.Message = "" + } + suite.Errors += 1 + case types.SpecStateAborted: + test.Failure = &JUnitFailure{ + Message: spec.Failure.Message, + Type: "aborted", + Description: failureDescriptionForUnstructuredReporters(spec), + } + if config.OmitFailureMessageAttr { + test.Failure.Message = "" + } + suite.Errors += 1 + case types.SpecStatePanicked: + test.Error = &JUnitError{ + Message: spec.Failure.ForwardedPanic, + Type: "panicked", + Description: failureDescriptionForUnstructuredReporters(spec), + } + if config.OmitFailureMessageAttr { + test.Error.Message = "" + } + suite.Errors += 1 + } + + suite.TestCases = append(suite.TestCases, test) + } + + junitReport := JUnitTestSuites{ + Tests: suite.Tests, + Disabled: suite.Disabled + suite.Skipped, + Errors: suite.Errors, + Failures: suite.Failures, + Time: suite.Time, + TestSuites: []JUnitTestSuite{suite}, + } + + if err := os.MkdirAll(path.Dir(dst), 0770); err != nil { + return err + } + f, err := os.Create(dst) + if err != nil { + return err + } + f.WriteString(xml.Header) + encoder := xml.NewEncoder(f) + encoder.Indent(" ", " ") + encoder.Encode(junitReport) + + return f.Close() +} + +func MergeAndCleanupJUnitReports(sources []string, dst string) ([]string, error) { + messages := []string{} + mergedReport := JUnitTestSuites{} + for _, source := range sources { + report := JUnitTestSuites{} + f, err := os.Open(source) + if err != nil { + messages = append(messages, fmt.Sprintf("Could not open %s:\n%s", source, err.Error())) + continue + } + err = xml.NewDecoder(f).Decode(&report) + _ = f.Close() + if err != nil { + messages = append(messages, fmt.Sprintf("Could not decode %s:\n%s", source, err.Error())) + continue + } + os.Remove(source) + + mergedReport.Tests += report.Tests + mergedReport.Disabled += report.Disabled + mergedReport.Errors += report.Errors + mergedReport.Failures += report.Failures + mergedReport.Time += report.Time + mergedReport.TestSuites = append(mergedReport.TestSuites, report.TestSuites...) + } + + if err := os.MkdirAll(path.Dir(dst), 0770); err != nil { + return messages, err + } + f, err := os.Create(dst) + if err != nil { + return messages, err + } + f.WriteString(xml.Header) + encoder := xml.NewEncoder(f) + encoder.Indent(" ", " ") + encoder.Encode(mergedReport) + + return messages, f.Close() +} + +func failureDescriptionForUnstructuredReporters(spec types.SpecReport) string { + out := &strings.Builder{} + NewDefaultReporter(types.ReporterConfig{NoColor: true, VeryVerbose: true}, out).emitFailure(0, spec.State, spec.Failure, true) + if len(spec.AdditionalFailures) > 0 { + out.WriteString("\nThere were additional failures detected after the initial failure. These are visible in the timeline\n") + } + return out.String() +} + +func systemErrForUnstructuredReporters(spec types.SpecReport) string { + return RenderTimeline(spec, true) +} + +func RenderTimeline(spec types.SpecReport, noColor bool) string { + out := &strings.Builder{} + NewDefaultReporter(types.ReporterConfig{NoColor: noColor, VeryVerbose: true}, out).emitTimeline(0, spec, spec.Timeline()) + return out.String() +} + +func systemOutForUnstructuredReporters(spec types.SpecReport) string { + return spec.CapturedStdOutErr +} + +// Deprecated JUnitReporter (so folks can still compile their suites) +type JUnitReporter struct{} + +func NewJUnitReporter(_ string) *JUnitReporter { return &JUnitReporter{} } +func (reporter *JUnitReporter) SuiteWillBegin(_ config.GinkgoConfigType, _ *types.SuiteSummary) {} +func (reporter *JUnitReporter) BeforeSuiteDidRun(_ *types.SetupSummary) {} +func (reporter *JUnitReporter) SpecWillRun(_ *types.SpecSummary) {} +func (reporter *JUnitReporter) SpecDidComplete(_ *types.SpecSummary) {} +func (reporter *JUnitReporter) AfterSuiteDidRun(_ *types.SetupSummary) {} +func (reporter *JUnitReporter) SuiteDidEnd(_ *types.SuiteSummary) {} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/reporters/reporter.go b/backend/vendor/github.com/onsi/ginkgo/v2/reporters/reporter.go new file mode 100644 index 0000000..5e726c4 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/reporters/reporter.go @@ -0,0 +1,29 @@ +package reporters + +import ( + "github.com/onsi/ginkgo/v2/types" +) + +type Reporter interface { + SuiteWillBegin(report types.Report) + WillRun(report types.SpecReport) + DidRun(report types.SpecReport) + SuiteDidEnd(report types.Report) + + //Timeline emission + EmitFailure(state types.SpecState, failure types.Failure) + EmitProgressReport(progressReport types.ProgressReport) + EmitReportEntry(entry types.ReportEntry) + EmitSpecEvent(event types.SpecEvent) +} + +type NoopReporter struct{} + +func (n NoopReporter) SuiteWillBegin(report types.Report) {} +func (n NoopReporter) WillRun(report types.SpecReport) {} +func (n NoopReporter) DidRun(report types.SpecReport) {} +func (n NoopReporter) SuiteDidEnd(report types.Report) {} +func (n NoopReporter) EmitFailure(state types.SpecState, failure types.Failure) {} +func (n NoopReporter) EmitProgressReport(progressReport types.ProgressReport) {} +func (n NoopReporter) EmitReportEntry(entry types.ReportEntry) {} +func (n NoopReporter) EmitSpecEvent(event types.SpecEvent) {} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/reporters/teamcity_report.go b/backend/vendor/github.com/onsi/ginkgo/v2/reporters/teamcity_report.go new file mode 100644 index 0000000..55e1d1f --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/reporters/teamcity_report.go @@ -0,0 +1,113 @@ +/* + +TeamCity Reporter for Ginkgo + +Makes use of TeamCity's support for Service Messages +http://confluence.jetbrains.com/display/TCD7/Build+Script+Interaction+with+TeamCity#BuildScriptInteractionwithTeamCity-ReportingTests +*/ + +package reporters + +import ( + "fmt" + "os" + "path" + "strings" + + "github.com/onsi/ginkgo/v2/types" +) + +func tcEscape(s string) string { + s = strings.ReplaceAll(s, "|", "||") + s = strings.ReplaceAll(s, "'", "|'") + s = strings.ReplaceAll(s, "\n", "|n") + s = strings.ReplaceAll(s, "\r", "|r") + s = strings.ReplaceAll(s, "[", "|[") + s = strings.ReplaceAll(s, "]", "|]") + return s +} + +func GenerateTeamcityReport(report types.Report, dst string) error { + if err := os.MkdirAll(path.Dir(dst), 0770); err != nil { + return err + } + f, err := os.Create(dst) + if err != nil { + return err + } + + name := report.SuiteDescription + labels := report.SuiteLabels + semVerConstraints := report.SuiteSemVerConstraints + if len(labels) > 0 { + name = name + " [" + strings.Join(labels, ", ") + "]" + } + if len(semVerConstraints) > 0 { + name = name + " [" + strings.Join(semVerConstraints, ", ") + "]" + } + fmt.Fprintf(f, "##teamcity[testSuiteStarted name='%s']\n", tcEscape(name)) + for _, spec := range report.SpecReports { + name := fmt.Sprintf("[%s]", spec.LeafNodeType) + if spec.FullText() != "" { + name = name + " " + spec.FullText() + } + labels := spec.Labels() + if len(labels) > 0 { + name = name + " [" + strings.Join(labels, ", ") + "]" + } + semVerConstraints := spec.SemVerConstraints() + if len(semVerConstraints) > 0 { + name = name + " [" + strings.Join(semVerConstraints, ", ") + "]" + } + + name = tcEscape(name) + fmt.Fprintf(f, "##teamcity[testStarted name='%s']\n", name) + switch spec.State { + case types.SpecStatePending: + fmt.Fprintf(f, "##teamcity[testIgnored name='%s' message='pending']\n", name) + case types.SpecStateSkipped: + message := "skipped" + if spec.Failure.Message != "" { + message += " - " + spec.Failure.Message + } + fmt.Fprintf(f, "##teamcity[testIgnored name='%s' message='%s']\n", name, tcEscape(message)) + case types.SpecStateFailed: + details := failureDescriptionForUnstructuredReporters(spec) + fmt.Fprintf(f, "##teamcity[testFailed name='%s' message='failed - %s' details='%s']\n", name, tcEscape(spec.Failure.Message), tcEscape(details)) + case types.SpecStatePanicked: + details := failureDescriptionForUnstructuredReporters(spec) + fmt.Fprintf(f, "##teamcity[testFailed name='%s' message='panicked - %s' details='%s']\n", name, tcEscape(spec.Failure.ForwardedPanic), tcEscape(details)) + case types.SpecStateTimedout: + details := failureDescriptionForUnstructuredReporters(spec) + fmt.Fprintf(f, "##teamcity[testFailed name='%s' message='timedout - %s' details='%s']\n", name, tcEscape(spec.Failure.Message), tcEscape(details)) + case types.SpecStateInterrupted: + details := failureDescriptionForUnstructuredReporters(spec) + fmt.Fprintf(f, "##teamcity[testFailed name='%s' message='interrupted - %s' details='%s']\n", name, tcEscape(spec.Failure.Message), tcEscape(details)) + case types.SpecStateAborted: + details := failureDescriptionForUnstructuredReporters(spec) + fmt.Fprintf(f, "##teamcity[testFailed name='%s' message='aborted - %s' details='%s']\n", name, tcEscape(spec.Failure.Message), tcEscape(details)) + } + + fmt.Fprintf(f, "##teamcity[testStdOut name='%s' out='%s']\n", name, tcEscape(systemOutForUnstructuredReporters(spec))) + fmt.Fprintf(f, "##teamcity[testStdErr name='%s' out='%s']\n", name, tcEscape(systemErrForUnstructuredReporters(spec))) + fmt.Fprintf(f, "##teamcity[testFinished name='%s' duration='%d']\n", name, int(spec.RunTime.Seconds()*1000.0)) + } + fmt.Fprintf(f, "##teamcity[testSuiteFinished name='%s']\n", tcEscape(report.SuiteDescription)) + + return f.Close() +} + +func MergeAndCleanupTeamcityReports(sources []string, dst string) ([]string, error) { + messages := []string{} + merged := []byte{} + for _, source := range sources { + data, err := os.ReadFile(source) + if err != nil { + messages = append(messages, fmt.Sprintf("Could not open %s:\n%s", source, err.Error())) + continue + } + os.Remove(source) + merged = append(merged, data...) + } + return messages, os.WriteFile(dst, merged, 0666) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/types/around_node.go b/backend/vendor/github.com/onsi/ginkgo/v2/types/around_node.go new file mode 100644 index 0000000..a069e06 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/types/around_node.go @@ -0,0 +1,56 @@ +package types + +import ( + "context" +) + +type AroundNodeAllowedFuncs interface { + ~func(context.Context, func(context.Context)) | ~func(context.Context) context.Context | ~func() +} +type AroundNodeFunc func(ctx context.Context, body func(ctx context.Context)) + +func AroundNode[F AroundNodeAllowedFuncs](f F, cl CodeLocation) AroundNodeDecorator { + if f == nil { + panic("BuildAroundNode cannot be called with a nil function.") + } + var aroundNodeFunc func(context.Context, func(context.Context)) + switch x := any(f).(type) { + case func(context.Context, func(context.Context)): + aroundNodeFunc = x + case func(context.Context) context.Context: + aroundNodeFunc = func(ctx context.Context, body func(context.Context)) { + ctx = x(ctx) + body(ctx) + } + case func(): + aroundNodeFunc = func(ctx context.Context, body func(context.Context)) { + x() + body(ctx) + } + } + + return AroundNodeDecorator{ + Body: aroundNodeFunc, + CodeLocation: cl, + } +} + +type AroundNodeDecorator struct { + Body AroundNodeFunc + CodeLocation CodeLocation +} + +type AroundNodes []AroundNodeDecorator + +func (an AroundNodes) Clone() AroundNodes { + out := make(AroundNodes, len(an)) + copy(out, an) + return out +} + +func (an AroundNodes) Append(other ...AroundNodeDecorator) AroundNodes { + out := make(AroundNodes, len(an)+len(other)) + copy(out, an) + copy(out[len(an):], other) + return out +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/types/code_location.go b/backend/vendor/github.com/onsi/ginkgo/v2/types/code_location.go new file mode 100644 index 0000000..57e8751 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/types/code_location.go @@ -0,0 +1,159 @@ +package types + +import ( + "fmt" + "os" + "regexp" + "runtime" + "runtime/debug" + "strings" + "sync" +) + +type CodeLocation struct { + FileName string `json:",omitempty"` + LineNumber int `json:",omitempty"` + FullStackTrace string `json:",omitempty"` + CustomMessage string `json:",omitempty"` +} + +func (codeLocation CodeLocation) String() string { + if codeLocation.CustomMessage != "" { + return codeLocation.CustomMessage + } + return fmt.Sprintf("%s:%d", codeLocation.FileName, codeLocation.LineNumber) +} + +func (codeLocation CodeLocation) ContentsOfLine() string { + if codeLocation.CustomMessage != "" { + return "" + } + contents, err := os.ReadFile(codeLocation.FileName) + if err != nil { + return "" + } + lines := strings.Split(string(contents), "\n") + if len(lines) < codeLocation.LineNumber { + return "" + } + return lines[codeLocation.LineNumber-1] +} + +type codeLocationLocator struct { + pcs map[uintptr]bool + helpers map[string]bool + lock *sync.Mutex +} + +func (c *codeLocationLocator) addHelper(pc uintptr) { + c.lock.Lock() + defer c.lock.Unlock() + + if c.pcs[pc] { + return + } + c.lock.Unlock() + f := runtime.FuncForPC(pc) + c.lock.Lock() + if f == nil { + return + } + c.helpers[f.Name()] = true + c.pcs[pc] = true +} + +func (c *codeLocationLocator) hasHelper(name string) bool { + c.lock.Lock() + defer c.lock.Unlock() + return c.helpers[name] +} + +func (c *codeLocationLocator) getCodeLocation(skip int) CodeLocation { + pc := make([]uintptr, 40) + n := runtime.Callers(skip+2, pc) + if n == 0 { + return CodeLocation{} + } + pc = pc[:n] + frames := runtime.CallersFrames(pc) + for { + frame, more := frames.Next() + if !c.hasHelper(frame.Function) { + return CodeLocation{FileName: frame.File, LineNumber: frame.Line} + } + if !more { + break + } + } + return CodeLocation{} +} + +var clLocator = &codeLocationLocator{ + pcs: map[uintptr]bool{}, + helpers: map[string]bool{}, + lock: &sync.Mutex{}, +} + +// MarkAsHelper is used by GinkgoHelper to mark the caller (appropriately offset by skip)as a helper. You can use this directly if you need to provide an optional `skip` to mark functions further up the call stack as helpers. +func MarkAsHelper(optionalSkip ...int) { + skip := 1 + if len(optionalSkip) > 0 { + skip += optionalSkip[0] + } + pc, _, _, ok := runtime.Caller(skip) + if ok { + clLocator.addHelper(pc) + } +} + +func NewCustomCodeLocation(message string) CodeLocation { + return CodeLocation{ + CustomMessage: message, + } +} + +func NewCodeLocation(skip int) CodeLocation { + return clLocator.getCodeLocation(skip + 1) +} + +func NewCodeLocationWithStackTrace(skip int) CodeLocation { + cl := clLocator.getCodeLocation(skip + 1) + cl.FullStackTrace = PruneStack(string(debug.Stack()), skip+1) + return cl +} + +// PruneStack removes references to functions that are internal to Ginkgo +// and the Go runtime from a stack string and a certain number of stack entries +// at the beginning of the stack. The stack string has the format +// as returned by runtime/debug.Stack. The leading goroutine information is +// optional and always removed if present. Beware that runtime/debug.Stack +// adds itself as first entry, so typically skip must be >= 1 to remove that +// entry. +func PruneStack(fullStackTrace string, skip int) string { + stack := strings.Split(fullStackTrace, "\n") + // Ensure that the even entries are the method names and the + // odd entries the source code information. + if len(stack) > 0 && strings.HasPrefix(stack[0], "goroutine ") { + // Ignore "goroutine 29 [running]:" line. + stack = stack[1:] + } + // The "+1" is for skipping over the initial entry, which is + // runtime/debug.Stack() itself. + if len(stack) > 2*(skip+1) { + stack = stack[2*(skip+1):] + } + prunedStack := []string{} + if os.Getenv("GINKGO_PRUNE_STACK") == "FALSE" { + prunedStack = stack + } else { + re := regexp.MustCompile(`\/ginkgo\/|\/pkg\/testing\/|\/pkg\/runtime\/`) + for i := 0; i < len(stack)/2; i++ { + // We filter out based on the source code file name. + if !re.MatchString(stack[i*2+1]) { + prunedStack = append(prunedStack, stack[i*2]) + prunedStack = append(prunedStack, stack[i*2+1]) + } + } + } + return strings.Join(prunedStack, "\n") +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/types/config.go b/backend/vendor/github.com/onsi/ginkgo/v2/types/config.go new file mode 100644 index 0000000..f847036 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/types/config.go @@ -0,0 +1,821 @@ +/* +Ginkgo accepts a number of configuration options. +These are documented [here](http://onsi.github.io/ginkgo/#the-ginkgo-cli) +*/ + +package types + +import ( + "flag" + "os" + "path/filepath" + "runtime" + "strconv" + "strings" + "time" +) + +// Configuration controlling how an individual test suite is run +type SuiteConfig struct { + RandomSeed int64 + RandomizeAllSpecs bool + FocusStrings []string + SkipStrings []string + FocusFiles []string + SkipFiles []string + LabelFilter string + SemVerFilter string + FailOnPending bool + FailOnEmpty bool + FailFast bool + FlakeAttempts int + MustPassRepeatedly int + DryRun bool + PollProgressAfter time.Duration + PollProgressInterval time.Duration + Timeout time.Duration + EmitSpecProgress bool // this is deprecated but its removal is causing compile issue for some users that were setting it manually + OutputInterceptorMode string + SourceRoots []string + GracePeriod time.Duration + + ParallelProcess int + ParallelTotal int + ParallelHost string +} + +func NewDefaultSuiteConfig() SuiteConfig { + return SuiteConfig{ + RandomSeed: time.Now().Unix(), + Timeout: time.Hour, + ParallelProcess: 1, + ParallelTotal: 1, + GracePeriod: 30 * time.Second, + } +} + +type VerbosityLevel uint + +const ( + VerbosityLevelSuccinct VerbosityLevel = iota + VerbosityLevelNormal + VerbosityLevelVerbose + VerbosityLevelVeryVerbose +) + +func (vl VerbosityLevel) GT(comp VerbosityLevel) bool { + return vl > comp +} + +func (vl VerbosityLevel) GTE(comp VerbosityLevel) bool { + return vl >= comp +} + +func (vl VerbosityLevel) Is(comp VerbosityLevel) bool { + return vl == comp +} + +func (vl VerbosityLevel) LTE(comp VerbosityLevel) bool { + return vl <= comp +} + +func (vl VerbosityLevel) LT(comp VerbosityLevel) bool { + return vl < comp +} + +// Configuration for Ginkgo's reporter +type ReporterConfig struct { + NoColor bool + Succinct bool + Verbose bool + VeryVerbose bool + FullTrace bool + ShowNodeEvents bool + GithubOutput bool + SilenceSkips bool + ForceNewlines bool + + JSONReport string + GoJSONReport string + JUnitReport string + TeamcityReport string +} + +func (rc ReporterConfig) Verbosity() VerbosityLevel { + if rc.Succinct { + return VerbosityLevelSuccinct + } else if rc.Verbose { + return VerbosityLevelVerbose + } else if rc.VeryVerbose { + return VerbosityLevelVeryVerbose + } + return VerbosityLevelNormal +} + +func (rc ReporterConfig) WillGenerateReport() bool { + return rc.JSONReport != "" || rc.GoJSONReport != "" || rc.JUnitReport != "" || rc.TeamcityReport != "" +} + +func NewDefaultReporterConfig() ReporterConfig { + return ReporterConfig{} +} + +// Configuration for the Ginkgo CLI +type CLIConfig struct { + //for build, run, and watch + Recurse bool + SkipPackage string + RequireSuite bool + NumCompilers int + + //for run and watch only + Procs int + Parallel bool + AfterRunHook string + OutputDir string + KeepSeparateCoverprofiles bool + KeepSeparateReports bool + + //for run only + KeepGoing bool + UntilItFails bool + Repeat int + RandomizeSuites bool + + //for watch only + Depth int + WatchRegExp string +} + +func NewDefaultCLIConfig() CLIConfig { + return CLIConfig{ + Depth: 1, + WatchRegExp: `\.go$`, + } +} + +func (g CLIConfig) ComputedProcs() int { + if g.Procs > 0 { + return g.Procs + } + + n := 1 + if g.Parallel { + n = runtime.GOMAXPROCS(-1) + if n > 4 { + n = n - 1 + } + } + return n +} + +func (g CLIConfig) ComputedNumCompilers() int { + if g.NumCompilers > 0 { + return g.NumCompilers + } + + return runtime.GOMAXPROCS(-1) +} + +// Configuration for the Ginkgo CLI capturing available go flags +// A subset of Go flags are exposed by Ginkgo. Some are available at compile time (e.g. ginkgo build) and others only at run time (e.g. ginkgo run - which has both build and run time flags). +// More details can be found at: +// https://docs.google.com/spreadsheets/d/1zkp-DS4hU4sAJl5eHh1UmgwxCPQhf3s5a8fbiOI8tJU/ +type GoFlagsConfig struct { + //build-time flags for code-and-performance analysis + Race bool + Cover bool + CoverMode string + CoverPkg string + Vet string + + //run-time flags for code-and-performance analysis + BlockProfile string + BlockProfileRate int + CoverProfile string + CPUProfile string + MemProfile string + MemProfileRate int + MutexProfile string + MutexProfileFraction int + Trace string + + //build-time flags for building + A bool + ASMFlags string + BuildMode string + BuildVCS bool + Compiler string + GCCGoFlags string + GCFlags string + InstallSuffix string + LDFlags string + LinkShared bool + Mod string + N bool + ModFile string + ModCacheRW bool + MSan bool + PkgDir string + Tags string + TrimPath bool + ToolExec string + Work bool + X bool + O string +} + +func NewDefaultGoFlagsConfig() GoFlagsConfig { + return GoFlagsConfig{} +} + +func (g GoFlagsConfig) BinaryMustBePreserved() bool { + return g.BlockProfile != "" || g.CPUProfile != "" || g.MemProfile != "" || g.MutexProfile != "" +} + +func (g GoFlagsConfig) NeedsSymbols() bool { + return g.BinaryMustBePreserved() +} + +// Configuration that were deprecated in 2.0 +type deprecatedConfig struct { + DebugParallel bool + NoisySkippings bool + NoisyPendings bool + RegexScansFilePath bool + SlowSpecThresholdWithFLoatUnits float64 + Stream bool + Notify bool + EmitSpecProgress bool + SlowSpecThreshold time.Duration + AlwaysEmitGinkgoWriter bool +} + +// Flags + +// Flags sections used by both the CLI and the Ginkgo test process +var FlagSections = GinkgoFlagSections{ + {Key: "multiple-suites", Style: "{{dark-green}}", Heading: "Running Multiple Test Suites"}, + {Key: "order", Style: "{{green}}", Heading: "Controlling Test Order"}, + {Key: "parallel", Style: "{{yellow}}", Heading: "Controlling Test Parallelism"}, + {Key: "low-level-parallel", Style: "{{yellow}}", Heading: "Controlling Test Parallelism", + Description: "These are set by the Ginkgo CLI, {{red}}{{bold}}do not set them manually{{/}} via go test.\nUse ginkgo -p or ginkgo -procs=N instead."}, + {Key: "filter", Style: "{{cyan}}", Heading: "Filtering Tests"}, + {Key: "failure", Style: "{{red}}", Heading: "Failure Handling"}, + {Key: "output", Style: "{{magenta}}", Heading: "Controlling Output Formatting"}, + {Key: "code-and-coverage-analysis", Style: "{{orange}}", Heading: "Code and Coverage Analysis", + Description: "When generating a cover files, please pass a filename {{bold}}not{{/}} a path. To specify a different directory use {{magenta}}--output-dir{{/}}.", + }, + {Key: "performance-analysis", Style: "{{coral}}", Heading: "Performance Analysis", + Description: "When generating profile files, please pass filenames {{bold}}not{{/}} a path. Ginkgo will generate a profile file with the given name in the package's directory. To specify a different directory use {{magenta}}--output-dir{{/}}.", + }, + {Key: "debug", Style: "{{blue}}", Heading: "Debugging Tests", + Description: "In addition to these flags, Ginkgo supports a few debugging environment variables. To change the parallel server protocol set {{blue}}GINKGO_PARALLEL_PROTOCOL{{/}} to {{bold}}HTTP{{/}}. To avoid pruning callstacks set {{blue}}GINKGO_PRUNE_STACK{{/}} to {{bold}}FALSE{{/}}."}, + {Key: "watch", Style: "{{light-yellow}}", Heading: "Controlling Ginkgo Watch"}, + {Key: "misc", Style: "{{light-gray}}", Heading: "Miscellaneous"}, + {Key: "go-build", Style: "{{light-gray}}", Heading: "Go Build Flags", Succinct: true, + Description: "These flags are inherited from go build. Run {{bold}}ginkgo help build{{/}} for more detailed flag documentation."}, +} + +// SuiteConfigFlags provides flags for the Ginkgo test process, and CLI +var SuiteConfigFlags = GinkgoFlags{ + {KeyPath: "S.RandomSeed", Name: "seed", SectionKey: "order", UsageDefaultValue: "randomly generated by Ginkgo", + Usage: "The seed used to randomize the spec suite.", AlwaysExport: true}, + {KeyPath: "S.RandomizeAllSpecs", Name: "randomize-all", SectionKey: "order", DeprecatedName: "randomizeAllSpecs", DeprecatedDocLink: "changed-command-line-flags", + Usage: "If set, ginkgo will randomize all specs together. By default, ginkgo only randomizes the top level Describe, Context and When containers."}, + + {KeyPath: "S.FailOnPending", Name: "fail-on-pending", SectionKey: "failure", DeprecatedName: "failOnPending", DeprecatedDocLink: "changed-command-line-flags", + Usage: "If set, ginkgo will mark the test suite as failed if any specs are pending."}, + {KeyPath: "S.FailFast", Name: "fail-fast", SectionKey: "failure", DeprecatedName: "failFast", DeprecatedDocLink: "changed-command-line-flags", + Usage: "If set, ginkgo will stop running a test suite after a failure occurs."}, + {KeyPath: "S.FlakeAttempts", Name: "flake-attempts", SectionKey: "failure", UsageDefaultValue: "0 - failed tests are not retried", DeprecatedName: "flakeAttempts", DeprecatedDocLink: "changed-command-line-flags", + Usage: "Make up to this many attempts to run each spec. If any of the attempts succeed, the suite will not be failed."}, + {KeyPath: "S.FailOnEmpty", Name: "fail-on-empty", SectionKey: "failure", + Usage: "If set, ginkgo will mark the test suite as failed if no specs are run."}, + + {KeyPath: "S.DryRun", Name: "dry-run", SectionKey: "debug", DeprecatedName: "dryRun", DeprecatedDocLink: "changed-command-line-flags", + Usage: "If set, ginkgo will walk the test hierarchy without actually running anything. Best paired with -v."}, + {KeyPath: "S.PollProgressAfter", Name: "poll-progress-after", SectionKey: "debug", UsageDefaultValue: "0", + Usage: "Emit node progress reports periodically if node hasn't completed after this duration."}, + {KeyPath: "S.PollProgressInterval", Name: "poll-progress-interval", SectionKey: "debug", UsageDefaultValue: "10s", + Usage: "The rate at which to emit node progress reports after poll-progress-after has elapsed."}, + {KeyPath: "S.SourceRoots", Name: "source-root", SectionKey: "debug", + Usage: "The location to look for source code when generating progress reports. You can pass multiple --source-root flags."}, + {KeyPath: "S.Timeout", Name: "timeout", SectionKey: "debug", UsageDefaultValue: "1h", + Usage: "Test suite fails if it does not complete within the specified timeout."}, + {KeyPath: "S.GracePeriod", Name: "grace-period", SectionKey: "debug", UsageDefaultValue: "30s", + Usage: "When interrupted, Ginkgo will wait for GracePeriod for the current running node to exit before moving on to the next one."}, + {KeyPath: "S.OutputInterceptorMode", Name: "output-interceptor-mode", SectionKey: "debug", UsageArgument: "dup, swap, or none", + Usage: "If set, ginkgo will use the specified output interception strategy when running in parallel. Defaults to dup on unix and swap on windows."}, + + {KeyPath: "S.LabelFilter", Name: "label-filter", SectionKey: "filter", UsageArgument: "expression", + Usage: "If set, ginkgo will only run specs with labels that match the label-filter. The passed-in expression can include boolean operations (!, &&, ||, ','), groupings via '()', and regular expressions '/regexp/'. e.g. '(cat || dog) && !fruit'"}, + {KeyPath: "S.SemVerFilter", Name: "sem-ver-filter", SectionKey: "filter", UsageArgument: "version", + Usage: "If set, ginkgo will only run specs with semantic version constraints that are satisfied by the provided version. e.g. '2.1.0'"}, + {KeyPath: "S.FocusStrings", Name: "focus", SectionKey: "filter", + Usage: "If set, ginkgo will only run specs that match this regular expression. Can be specified multiple times, values are ORed."}, + {KeyPath: "S.SkipStrings", Name: "skip", SectionKey: "filter", + Usage: "If set, ginkgo will only run specs that do not match this regular expression. Can be specified multiple times, values are ORed."}, + {KeyPath: "S.FocusFiles", Name: "focus-file", SectionKey: "filter", UsageArgument: "file (regexp) | file:line | file:lineA-lineB | file:line,line,line", + Usage: "If set, ginkgo will only run specs in matching files. Can be specified multiple times, values are ORed."}, + {KeyPath: "S.SkipFiles", Name: "skip-file", SectionKey: "filter", UsageArgument: "file (regexp) | file:line | file:lineA-lineB | file:line,line,line", + Usage: "If set, ginkgo will skip specs in matching files. Can be specified multiple times, values are ORed."}, + + {KeyPath: "D.RegexScansFilePath", DeprecatedName: "regexScansFilePath", DeprecatedDocLink: "removed--regexscansfilepath", DeprecatedVersion: "2.0.0"}, + {KeyPath: "D.DebugParallel", DeprecatedName: "debug", DeprecatedDocLink: "removed--debug", DeprecatedVersion: "2.0.0"}, + {KeyPath: "D.EmitSpecProgress", DeprecatedName: "progress", SectionKey: "debug", + DeprecatedVersion: "2.5.0", Usage: ". The functionality provided by --progress was confusing and is no longer needed. Use --show-node-events instead to see node entry and exit events included in the timeline of failed and verbose specs. Or you can run with -vv to always see all node events. Lastly, --poll-progress-after and the PollProgressAfter decorator now provide a better mechanism for debugging specs that tend to get stuck."}, +} + +// ParallelConfigFlags provides flags for the Ginkgo test process (not the CLI) +var ParallelConfigFlags = GinkgoFlags{ + {KeyPath: "S.ParallelProcess", Name: "parallel.process", SectionKey: "low-level-parallel", UsageDefaultValue: "1", + Usage: "This worker process's (one-indexed) process number. For running specs in parallel."}, + {KeyPath: "S.ParallelTotal", Name: "parallel.total", SectionKey: "low-level-parallel", UsageDefaultValue: "1", + Usage: "The total number of worker processes. For running specs in parallel."}, + {KeyPath: "S.ParallelHost", Name: "parallel.host", SectionKey: "low-level-parallel", UsageDefaultValue: "set by Ginkgo CLI", + Usage: "The address for the server that will synchronize the processes."}, +} + +// ReporterConfigFlags provides flags for the Ginkgo test process, and CLI +var ReporterConfigFlags = GinkgoFlags{ + {KeyPath: "R.NoColor", Name: "no-color", SectionKey: "output", DeprecatedName: "noColor", DeprecatedDocLink: "changed-command-line-flags", + Usage: "If set, suppress color output in default reporter. You can also set the environment variable GINKGO_NO_COLOR=TRUE"}, + {KeyPath: "R.Verbose", Name: "v", SectionKey: "output", + Usage: "If set, emits more output including GinkgoWriter contents."}, + {KeyPath: "R.VeryVerbose", Name: "vv", SectionKey: "output", + Usage: "If set, emits with maximal verbosity - includes skipped and pending tests."}, + {KeyPath: "R.Succinct", Name: "succinct", SectionKey: "output", + Usage: "If set, default reporter prints out a very succinct report"}, + {KeyPath: "R.FullTrace", Name: "trace", SectionKey: "output", + Usage: "If set, default reporter prints out the full stack trace when a failure occurs"}, + {KeyPath: "R.ShowNodeEvents", Name: "show-node-events", SectionKey: "output", + Usage: "If set, default reporter prints node > Enter and < Exit events when specs fail"}, + {KeyPath: "R.GithubOutput", Name: "github-output", SectionKey: "output", + Usage: "If set, default reporter prints easier to manage output in Github Actions."}, + {KeyPath: "R.SilenceSkips", Name: "silence-skips", SectionKey: "output", + Usage: "If set, default reporter will not print out skipped tests."}, + {KeyPath: "R.ForceNewlines", Name: "force-newlines", SectionKey: "output", + Usage: "If set, default reporter will ensure a newline appears after each test."}, + + {KeyPath: "R.JSONReport", Name: "json-report", UsageArgument: "filename.json", SectionKey: "output", + Usage: "If set, Ginkgo will generate a JSON-formatted test report at the specified location."}, + {KeyPath: "R.GoJSONReport", Name: "gojson-report", UsageArgument: "filename.json", SectionKey: "output", + Usage: "If set, Ginkgo will generate a Go JSON-formatted test report at the specified location."}, + {KeyPath: "R.JUnitReport", Name: "junit-report", UsageArgument: "filename.xml", SectionKey: "output", DeprecatedName: "reportFile", DeprecatedDocLink: "improved-reporting-infrastructure", + Usage: "If set, Ginkgo will generate a conformant junit test report in the specified file."}, + {KeyPath: "R.TeamcityReport", Name: "teamcity-report", UsageArgument: "filename", SectionKey: "output", + Usage: "If set, Ginkgo will generate a Teamcity-formatted test report at the specified location."}, + + {KeyPath: "D.SlowSpecThresholdWithFLoatUnits", DeprecatedName: "slowSpecThreshold", DeprecatedDocLink: "changed--slowspecthreshold", + Usage: "use --slow-spec-threshold instead and pass in a duration string (e.g. '5s', not '5.0')"}, + {KeyPath: "D.NoisyPendings", DeprecatedName: "noisyPendings", DeprecatedDocLink: "removed--noisypendings-and--noisyskippings", DeprecatedVersion: "2.0.0"}, + {KeyPath: "D.NoisySkippings", DeprecatedName: "noisySkippings", DeprecatedDocLink: "removed--noisypendings-and--noisyskippings", DeprecatedVersion: "2.0.0"}, + {KeyPath: "D.SlowSpecThreshold", DeprecatedName: "slow-spec-threshold", SectionKey: "output", Usage: "--slow-spec-threshold has been deprecated and will be removed in a future version of Ginkgo. This feature has proved to be more noisy than useful. You can use --poll-progress-after, instead, to get more actionable feedback about potentially slow specs and understand where they might be getting stuck.", DeprecatedVersion: "2.5.0"}, + {KeyPath: "D.AlwaysEmitGinkgoWriter", DeprecatedName: "always-emit-ginkgo-writer", SectionKey: "output", Usage: " - use -v instead, or one of Ginkgo's machine-readable report formats to get GinkgoWriter output for passing specs."}, +} + +// BuildTestSuiteFlagSet attaches to the CommandLine flagset and provides flags for the Ginkgo test process +func BuildTestSuiteFlagSet(suiteConfig *SuiteConfig, reporterConfig *ReporterConfig) (GinkgoFlagSet, error) { + flags := SuiteConfigFlags.CopyAppend(ParallelConfigFlags...).CopyAppend(ReporterConfigFlags...) + flags = flags.WithPrefix("ginkgo") + bindings := map[string]any{ + "S": suiteConfig, + "R": reporterConfig, + "D": &deprecatedConfig{}, + } + extraGoFlagsSection := GinkgoFlagSection{Style: "{{gray}}", Heading: "Go test flags"} + + return NewAttachedGinkgoFlagSet(flag.CommandLine, flags, bindings, FlagSections, extraGoFlagsSection) +} + +// VetConfig validates that the Ginkgo test process' configuration is sound +func VetConfig(flagSet GinkgoFlagSet, suiteConfig SuiteConfig, reporterConfig ReporterConfig) []error { + errors := []error{} + + if flagSet.WasSet("count") || flagSet.WasSet("test.count") { + flag := flagSet.Lookup("count") + if flag == nil { + flag = flagSet.Lookup("test.count") + } + count, err := strconv.Atoi(flag.Value.String()) + if err != nil || count != 1 { + errors = append(errors, GinkgoErrors.InvalidGoFlagCount()) + } + } + + if flagSet.WasSet("parallel") || flagSet.WasSet("test.parallel") { + errors = append(errors, GinkgoErrors.InvalidGoFlagParallel()) + } + + if suiteConfig.ParallelTotal < 1 { + errors = append(errors, GinkgoErrors.InvalidParallelTotalConfiguration()) + } + + if suiteConfig.ParallelProcess > suiteConfig.ParallelTotal || suiteConfig.ParallelProcess < 1 { + errors = append(errors, GinkgoErrors.InvalidParallelProcessConfiguration()) + } + + if suiteConfig.ParallelTotal > 1 && suiteConfig.ParallelHost == "" { + errors = append(errors, GinkgoErrors.MissingParallelHostConfiguration()) + } + + if suiteConfig.DryRun && suiteConfig.ParallelTotal > 1 { + errors = append(errors, GinkgoErrors.DryRunInParallelConfiguration()) + } + + if suiteConfig.GracePeriod <= 0 { + errors = append(errors, GinkgoErrors.GracePeriodCannotBeZero()) + } + + if len(suiteConfig.FocusFiles) > 0 { + _, err := ParseFileFilters(suiteConfig.FocusFiles) + if err != nil { + errors = append(errors, err) + } + } + + if len(suiteConfig.SkipFiles) > 0 { + _, err := ParseFileFilters(suiteConfig.SkipFiles) + if err != nil { + errors = append(errors, err) + } + } + + if suiteConfig.LabelFilter != "" { + _, err := ParseLabelFilter(suiteConfig.LabelFilter) + if err != nil { + errors = append(errors, err) + } + } + + if suiteConfig.SemVerFilter != "" { + _, err := ParseSemVerFilter(suiteConfig.SemVerFilter) + if err != nil { + errors = append(errors, err) + } + } + + switch strings.ToLower(suiteConfig.OutputInterceptorMode) { + case "", "dup", "swap", "none": + default: + errors = append(errors, GinkgoErrors.InvalidOutputInterceptorModeConfiguration(suiteConfig.OutputInterceptorMode)) + } + + numVerbosity := 0 + for _, v := range []bool{reporterConfig.Succinct, reporterConfig.Verbose, reporterConfig.VeryVerbose} { + if v { + numVerbosity++ + } + } + if numVerbosity > 1 { + errors = append(errors, GinkgoErrors.ConflictingVerbosityConfiguration()) + } + + return errors +} + +// GinkgoCLISharedFlags provides flags shared by the Ginkgo CLI's build, watch, and run commands +var GinkgoCLISharedFlags = GinkgoFlags{ + {KeyPath: "C.Recurse", Name: "r", SectionKey: "multiple-suites", + Usage: "If set, ginkgo finds and runs test suites under the current directory recursively."}, + {KeyPath: "C.SkipPackage", Name: "skip-package", SectionKey: "multiple-suites", DeprecatedName: "skipPackage", DeprecatedDocLink: "changed-command-line-flags", + UsageArgument: "comma-separated list of packages", + Usage: "A comma-separated list of package names to be skipped. If any part of the package's path matches, that package is ignored."}, + {KeyPath: "C.RequireSuite", Name: "require-suite", SectionKey: "failure", DeprecatedName: "requireSuite", DeprecatedDocLink: "changed-command-line-flags", + Usage: "If set, Ginkgo fails if there are ginkgo tests in a directory but no invocation of RunSpecs."}, + {KeyPath: "C.NumCompilers", Name: "compilers", SectionKey: "multiple-suites", UsageDefaultValue: "0 (will autodetect)", + Usage: "When running multiple packages, the number of concurrent compilations to perform."}, +} + +// GinkgoCLIRunAndWatchFlags provides flags shared by the Ginkgo CLI's build and watch commands (but not run) +var GinkgoCLIRunAndWatchFlags = GinkgoFlags{ + {KeyPath: "C.Procs", Name: "procs", SectionKey: "parallel", UsageDefaultValue: "1 (run in series)", + Usage: "The number of parallel test nodes to run."}, + {KeyPath: "C.Procs", Name: "nodes", SectionKey: "parallel", UsageDefaultValue: "1 (run in series)", + Usage: "--nodes is an alias for --procs"}, + {KeyPath: "C.Parallel", Name: "p", SectionKey: "parallel", + Usage: "If set, ginkgo will run in parallel with an auto-detected number of nodes."}, + {KeyPath: "C.AfterRunHook", Name: "after-run-hook", SectionKey: "misc", DeprecatedName: "afterSuiteHook", DeprecatedDocLink: "changed-command-line-flags", + Usage: "Command to run when a test suite completes."}, + {KeyPath: "C.OutputDir", Name: "output-dir", SectionKey: "output", UsageArgument: "directory", DeprecatedName: "outputdir", DeprecatedDocLink: "improved-profiling-support", + Usage: "A location to place all generated profiles and reports."}, + {KeyPath: "C.KeepSeparateCoverprofiles", Name: "keep-separate-coverprofiles", SectionKey: "code-and-coverage-analysis", + Usage: "If set, Ginkgo does not merge coverprofiles into one monolithic coverprofile. The coverprofiles will remain in their respective package directories or in -output-dir if set."}, + {KeyPath: "C.KeepSeparateReports", Name: "keep-separate-reports", SectionKey: "output", + Usage: "If set, Ginkgo does not merge per-suite reports (e.g. -json-report) into one monolithic report for the entire testrun. The reports will remain in their respective package directories or in -output-dir if set."}, + + {KeyPath: "D.Stream", DeprecatedName: "stream", DeprecatedDocLink: "removed--stream", DeprecatedVersion: "2.0.0"}, + {KeyPath: "D.Notify", DeprecatedName: "notify", DeprecatedDocLink: "removed--notify", DeprecatedVersion: "2.0.0"}, +} + +// GinkgoCLIRunFlags provides flags for Ginkgo CLI's run command that aren't shared by any other commands +var GinkgoCLIRunFlags = GinkgoFlags{ + {KeyPath: "C.KeepGoing", Name: "keep-going", SectionKey: "multiple-suites", DeprecatedName: "keepGoing", DeprecatedDocLink: "changed-command-line-flags", + Usage: "If set, failures from earlier test suites do not prevent later test suites from running."}, + {KeyPath: "C.UntilItFails", Name: "until-it-fails", SectionKey: "debug", DeprecatedName: "untilItFails", DeprecatedDocLink: "changed-command-line-flags", + Usage: "If set, ginkgo will keep rerunning test suites until a failure occurs."}, + {KeyPath: "C.Repeat", Name: "repeat", SectionKey: "debug", UsageArgument: "n", UsageDefaultValue: "0 - i.e. no repetition, run only once", + Usage: "The number of times to re-run a test-suite. Useful for debugging flaky tests. If set to N the suite will be run N+1 times and will be required to pass each time."}, + {KeyPath: "C.RandomizeSuites", Name: "randomize-suites", SectionKey: "order", DeprecatedName: "randomizeSuites", DeprecatedDocLink: "changed-command-line-flags", + Usage: "If set, ginkgo will randomize the order in which test suites run."}, +} + +// GinkgoCLIRunFlags provides flags for Ginkgo CLI's watch command that aren't shared by any other commands +var GinkgoCLIWatchFlags = GinkgoFlags{ + {KeyPath: "C.Depth", Name: "depth", SectionKey: "watch", + Usage: "Ginkgo will watch dependencies down to this depth in the dependency tree."}, + {KeyPath: "C.WatchRegExp", Name: "watch-regexp", SectionKey: "watch", DeprecatedName: "watchRegExp", DeprecatedDocLink: "changed-command-line-flags", + UsageArgument: "Regular Expression", + UsageDefaultValue: `\.go$`, + Usage: "Only files matching this regular expression will be watched for changes."}, +} + +// GoBuildFlags provides flags for the Ginkgo CLI build, run, and watch commands that capture go's build-time flags. These are passed to go test -c by the ginkgo CLI +var GoBuildFlags = GinkgoFlags{ + {KeyPath: "Go.Race", Name: "race", SectionKey: "code-and-coverage-analysis", + Usage: "enable data race detection. Supported on linux/amd64, linux/ppc64le, linux/arm64, linux/s390x, freebsd/amd64, netbsd/amd64, darwin/amd64, darwin/arm64, and windows/amd64."}, + {KeyPath: "Go.Vet", Name: "vet", UsageArgument: "list", SectionKey: "code-and-coverage-analysis", + Usage: `Configure the invocation of "go vet" during "go test" to use the comma-separated list of vet checks. If list is empty (by explicitly passing --vet=""), "go test" runs "go vet" with a curated list of checks believed to be always worth addressing. If list is "off", "go test" does not run "go vet" at all. Available checks can be found by running 'go doc cmd/vet'`}, + {KeyPath: "Go.Cover", Name: "cover", SectionKey: "code-and-coverage-analysis", + Usage: "Enable coverage analysis. Note that because coverage works by annotating the source code before compilation, compilation and test failures with coverage enabled may report line numbers that don't correspond to the original sources."}, + {KeyPath: "Go.CoverMode", Name: "covermode", UsageArgument: "set,count,atomic", SectionKey: "code-and-coverage-analysis", + Usage: `Set the mode for coverage analysis for the package[s] being tested. 'set': does this statement run? 'count': how many times does this statement run? 'atomic': like count, but correct in multithreaded tests and more expensive (must use atomic with -race). Sets -cover`}, + {KeyPath: "Go.CoverPkg", Name: "coverpkg", UsageArgument: "pattern1,pattern2,pattern3", SectionKey: "code-and-coverage-analysis", + Usage: "Apply coverage analysis in each test to packages matching the patterns. The default is for each test to analyze only the package being tested. See 'go help packages' for a description of package patterns. Sets -cover."}, + + {KeyPath: "Go.A", Name: "a", SectionKey: "go-build", + Usage: "force rebuilding of packages that are already up-to-date."}, + {KeyPath: "Go.ASMFlags", Name: "asmflags", UsageArgument: "'[pattern=]arg list'", SectionKey: "go-build", + Usage: "arguments to pass on each go tool asm invocation."}, + {KeyPath: "Go.BuildMode", Name: "buildmode", UsageArgument: "mode", SectionKey: "go-build", + Usage: "build mode to use. See 'go help buildmode' for more."}, + {KeyPath: "Go.BuildVCS", Name: "buildvcs", SectionKey: "go-build", + Usage: "adds version control information."}, + {KeyPath: "Go.Compiler", Name: "compiler", UsageArgument: "name", SectionKey: "go-build", + Usage: "name of compiler to use, as in runtime.Compiler (gccgo or gc)."}, + {KeyPath: "Go.GCCGoFlags", Name: "gccgoflags", UsageArgument: "'[pattern=]arg list'", SectionKey: "go-build", + Usage: "arguments to pass on each gccgo compiler/linker invocation."}, + {KeyPath: "Go.GCFlags", Name: "gcflags", UsageArgument: "'[pattern=]arg list'", SectionKey: "go-build", + Usage: "arguments to pass on each go tool compile invocation."}, + {KeyPath: "Go.InstallSuffix", Name: "installsuffix", SectionKey: "go-build", + Usage: "a suffix to use in the name of the package installation directory, in order to keep output separate from default builds. If using the -race flag, the install suffix is automatically set to raceor, if set explicitly, has _race appended to it. Likewise for the -msan flag. Using a -buildmode option that requires non-default compile flags has a similar effect."}, + {KeyPath: "Go.LDFlags", Name: "ldflags", UsageArgument: "'[pattern=]arg list'", SectionKey: "go-build", + Usage: "arguments to pass on each go tool link invocation."}, + {KeyPath: "Go.LinkShared", Name: "linkshared", SectionKey: "go-build", + Usage: "build code that will be linked against shared libraries previously created with -buildmode=shared."}, + {KeyPath: "Go.Mod", Name: "mod", UsageArgument: "mode (readonly, vendor, or mod)", SectionKey: "go-build", + Usage: "module download mode to use: readonly, vendor, or mod. See 'go help modules' for more."}, + {KeyPath: "Go.ModCacheRW", Name: "modcacherw", SectionKey: "go-build", + Usage: "leave newly-created directories in the module cache read-write instead of making them read-only."}, + {KeyPath: "Go.ModFile", Name: "modfile", UsageArgument: "file", SectionKey: "go-build", + Usage: `in module aware mode, read (and possibly write) an alternate go.mod file instead of the one in the module root directory. A file named go.mod must still be present in order to determine the module root directory, but it is not accessed. When -modfile is specified, an alternate go.sum file is also used: its path is derived from the -modfile flag by trimming the ".mod" extension and appending ".sum".`}, + {KeyPath: "Go.MSan", Name: "msan", SectionKey: "go-build", + Usage: "enable interoperation with memory sanitizer. Supported only on linux/amd64, linux/arm64 and only with Clang/LLVM as the host C compiler. On linux/arm64, pie build mode will be used."}, + {KeyPath: "Go.N", Name: "n", SectionKey: "go-build", + Usage: "print the commands but do not run them."}, + {KeyPath: "Go.PkgDir", Name: "pkgdir", UsageArgument: "dir", SectionKey: "go-build", + Usage: "install and load all packages from dir instead of the usual locations. For example, when building with a non-standard configuration, use -pkgdir to keep generated packages in a separate location."}, + {KeyPath: "Go.Tags", Name: "tags", UsageArgument: "tag,list", SectionKey: "go-build", + Usage: "a comma-separated list of build tags to consider satisfied during the build. For more information about build tags, see the description of build constraints in the documentation for the go/build package. (Earlier versions of Go used a space-separated list, and that form is deprecated but still recognized.)"}, + {KeyPath: "Go.TrimPath", Name: "trimpath", SectionKey: "go-build", + Usage: `remove all file system paths from the resulting executable. Instead of absolute file system paths, the recorded file names will begin with either "go" (for the standard library), or a module path@version (when using modules), or a plain import path (when using GOPATH).`}, + {KeyPath: "Go.ToolExec", Name: "toolexec", UsageArgument: "'cmd args'", SectionKey: "go-build", + Usage: "a program to use to invoke toolchain programs like vet and asm. For example, instead of running asm, the go command will run cmd args /path/to/asm '."}, + {KeyPath: "Go.Work", Name: "work", SectionKey: "go-build", + Usage: "print the name of the temporary work directory and do not delete it when exiting."}, + {KeyPath: "Go.X", Name: "x", SectionKey: "go-build", + Usage: "print the commands."}, +} + +var GoBuildOFlags = GinkgoFlags{ + {KeyPath: "Go.O", Name: "o", SectionKey: "go-build", + Usage: "output binary path (including name)."}, +} + +// GoRunFlags provides flags for the Ginkgo CLI run, and watch commands that capture go's run-time flags. These are passed to the compiled test binary by the ginkgo CLI +var GoRunFlags = GinkgoFlags{ + {KeyPath: "Go.CoverProfile", Name: "coverprofile", UsageArgument: "file", SectionKey: "code-and-coverage-analysis", + Usage: `Write a coverage profile to the file after all tests have passed. Sets -cover. Must be passed a filename, not a path. Use output-dir to control the location of the output.`}, + {KeyPath: "Go.BlockProfile", Name: "blockprofile", UsageArgument: "file", SectionKey: "performance-analysis", + Usage: `Write a goroutine blocking profile to the specified file when all tests are complete. Preserves test binary.`}, + {KeyPath: "Go.BlockProfileRate", Name: "blockprofilerate", UsageArgument: "rate", SectionKey: "performance-analysis", + Usage: `Control the detail provided in goroutine blocking profiles by calling runtime.SetBlockProfileRate with rate. See 'go doc runtime.SetBlockProfileRate'. The profiler aims to sample, on average, one blocking event every n nanoseconds the program spends blocked. By default, if -test.blockprofile is set without this flag, all blocking events are recorded, equivalent to -test.blockprofilerate=1.`}, + {KeyPath: "Go.CPUProfile", Name: "cpuprofile", UsageArgument: "file", SectionKey: "performance-analysis", + Usage: `Write a CPU profile to the specified file before exiting. Preserves test binary.`}, + {KeyPath: "Go.MemProfile", Name: "memprofile", UsageArgument: "file", SectionKey: "performance-analysis", + Usage: `Write an allocation profile to the file after all tests have passed. Preserves test binary.`}, + {KeyPath: "Go.MemProfileRate", Name: "memprofilerate", UsageArgument: "rate", SectionKey: "performance-analysis", + Usage: `Enable more precise (and expensive) memory allocation profiles by setting runtime.MemProfileRate. See 'go doc runtime.MemProfileRate'. To profile all memory allocations, use -test.memprofilerate=1.`}, + {KeyPath: "Go.MutexProfile", Name: "mutexprofile", UsageArgument: "file", SectionKey: "performance-analysis", + Usage: `Write a mutex contention profile to the specified file when all tests are complete. Preserves test binary.`}, + {KeyPath: "Go.MutexProfileFraction", Name: "mutexprofilefraction", UsageArgument: "n", SectionKey: "performance-analysis", + Usage: `if >= 0, calls runtime.SetMutexProfileFraction() Sample 1 in n stack traces of goroutines holding a contended mutex.`}, + {KeyPath: "Go.Trace", Name: "execution-trace", UsageArgument: "file", ExportAs: "trace", SectionKey: "performance-analysis", + Usage: `Write an execution trace to the specified file before exiting.`}, +} + +// VetAndInitializeCLIAndGoConfig validates that the Ginkgo CLI's configuration is sound +// It returns a potentially mutated copy of the config that rationalizes the configuration to ensure consistency for downstream consumers +func VetAndInitializeCLIAndGoConfig(cliConfig CLIConfig, goFlagsConfig GoFlagsConfig) (CLIConfig, GoFlagsConfig, []error) { + errors := []error{} + + if cliConfig.Repeat > 0 && cliConfig.UntilItFails { + errors = append(errors, GinkgoErrors.BothRepeatAndUntilItFails()) + } + + if strings.ContainsRune(goFlagsConfig.CoverProfile, os.PathSeparator) { + errors = append(errors, GinkgoErrors.ExpectFilenameNotPath("--coverprofile", goFlagsConfig.CoverProfile)) + } + if strings.ContainsRune(goFlagsConfig.CPUProfile, os.PathSeparator) { + errors = append(errors, GinkgoErrors.ExpectFilenameNotPath("--cpuprofile", goFlagsConfig.CPUProfile)) + } + if strings.ContainsRune(goFlagsConfig.MemProfile, os.PathSeparator) { + errors = append(errors, GinkgoErrors.ExpectFilenameNotPath("--memprofile", goFlagsConfig.MemProfile)) + } + if strings.ContainsRune(goFlagsConfig.BlockProfile, os.PathSeparator) { + errors = append(errors, GinkgoErrors.ExpectFilenameNotPath("--blockprofile", goFlagsConfig.BlockProfile)) + } + if strings.ContainsRune(goFlagsConfig.MutexProfile, os.PathSeparator) { + errors = append(errors, GinkgoErrors.ExpectFilenameNotPath("--mutexprofile", goFlagsConfig.MutexProfile)) + } + + //initialize the output directory + if cliConfig.OutputDir != "" { + err := os.MkdirAll(cliConfig.OutputDir, 0777) + if err != nil { + errors = append(errors, err) + } + } + + //ensure cover mode is configured appropriately + if goFlagsConfig.CoverMode != "" || goFlagsConfig.CoverPkg != "" || goFlagsConfig.CoverProfile != "" { + goFlagsConfig.Cover = true + } + if goFlagsConfig.Cover && goFlagsConfig.CoverProfile == "" { + goFlagsConfig.CoverProfile = "coverprofile.out" + } + + return cliConfig, goFlagsConfig, errors +} + +// GenerateGoTestCompileArgs is used by the Ginkgo CLI to generate command line arguments to pass to the go test -c command when compiling the test +func GenerateGoTestCompileArgs(goFlagsConfig GoFlagsConfig, packageToBuild string, pathToInvocationPath string, preserveSymbols bool) ([]string, error) { + // if the user has set the CoverProfile run-time flag make sure to set the build-time cover flag to make sure + // the built test binary can generate a coverprofile + if goFlagsConfig.CoverProfile != "" { + goFlagsConfig.Cover = true + } + + if goFlagsConfig.CoverPkg != "" { + coverPkgs := strings.Split(goFlagsConfig.CoverPkg, ",") + adjustedCoverPkgs := make([]string, len(coverPkgs)) + for i, coverPkg := range coverPkgs { + coverPkg = strings.Trim(coverPkg, " ") + if strings.HasPrefix(coverPkg, "./") { + // this is a relative coverPkg - we need to reroot it + adjustedCoverPkgs[i] = "./" + filepath.Join(pathToInvocationPath, strings.TrimPrefix(coverPkg, "./")) + } else { + // this is a package name - don't touch it + adjustedCoverPkgs[i] = coverPkg + } + } + goFlagsConfig.CoverPkg = strings.Join(adjustedCoverPkgs, ",") + } + + if !goFlagsConfig.NeedsSymbols() && goFlagsConfig.LDFlags == "" && !preserveSymbols { + goFlagsConfig.LDFlags = "-w -s" + } + + args := []string{"test", "-c", packageToBuild} + goArgs, err := GenerateFlagArgs( + GoBuildFlags.CopyAppend(GoBuildOFlags...), + map[string]any{ + "Go": &goFlagsConfig, + }, + ) + + if err != nil { + return []string{}, err + } + args = append(args, goArgs...) + return args, nil +} + +// GenerateGinkgoTestRunArgs is used by the Ginkgo CLI to generate command line arguments to pass to the compiled Ginkgo test binary +func GenerateGinkgoTestRunArgs(suiteConfig SuiteConfig, reporterConfig ReporterConfig, goFlagsConfig GoFlagsConfig) ([]string, error) { + var flags GinkgoFlags + flags = SuiteConfigFlags.WithPrefix("ginkgo") + flags = flags.CopyAppend(ParallelConfigFlags.WithPrefix("ginkgo")...) + flags = flags.CopyAppend(ReporterConfigFlags.WithPrefix("ginkgo")...) + flags = flags.CopyAppend(GoRunFlags.WithPrefix("test")...) + bindings := map[string]any{ + "S": &suiteConfig, + "R": &reporterConfig, + "Go": &goFlagsConfig, + } + + return GenerateFlagArgs(flags, bindings) +} + +// GenerateGoTestRunArgs is used by the Ginkgo CLI to generate command line arguments to pass to the compiled non-Ginkgo test binary +func GenerateGoTestRunArgs(goFlagsConfig GoFlagsConfig) ([]string, error) { + flags := GoRunFlags.WithPrefix("test") + bindings := map[string]any{ + "Go": &goFlagsConfig, + } + + args, err := GenerateFlagArgs(flags, bindings) + if err != nil { + return args, err + } + args = append(args, "--test.v") + return args, nil +} + +// BuildRunCommandFlagSet builds the FlagSet for the `ginkgo run` command +func BuildRunCommandFlagSet(suiteConfig *SuiteConfig, reporterConfig *ReporterConfig, cliConfig *CLIConfig, goFlagsConfig *GoFlagsConfig) (GinkgoFlagSet, error) { + flags := SuiteConfigFlags + flags = flags.CopyAppend(ReporterConfigFlags...) + flags = flags.CopyAppend(GinkgoCLISharedFlags...) + flags = flags.CopyAppend(GinkgoCLIRunAndWatchFlags...) + flags = flags.CopyAppend(GinkgoCLIRunFlags...) + flags = flags.CopyAppend(GoBuildFlags...) + flags = flags.CopyAppend(GoRunFlags...) + + bindings := map[string]any{ + "S": suiteConfig, + "R": reporterConfig, + "C": cliConfig, + "Go": goFlagsConfig, + "D": &deprecatedConfig{}, + } + + return NewGinkgoFlagSet(flags, bindings, FlagSections) +} + +// BuildWatchCommandFlagSet builds the FlagSet for the `ginkgo watch` command +func BuildWatchCommandFlagSet(suiteConfig *SuiteConfig, reporterConfig *ReporterConfig, cliConfig *CLIConfig, goFlagsConfig *GoFlagsConfig) (GinkgoFlagSet, error) { + flags := SuiteConfigFlags + flags = flags.CopyAppend(ReporterConfigFlags...) + flags = flags.CopyAppend(GinkgoCLISharedFlags...) + flags = flags.CopyAppend(GinkgoCLIRunAndWatchFlags...) + flags = flags.CopyAppend(GinkgoCLIWatchFlags...) + flags = flags.CopyAppend(GoBuildFlags...) + flags = flags.CopyAppend(GoRunFlags...) + + bindings := map[string]any{ + "S": suiteConfig, + "R": reporterConfig, + "C": cliConfig, + "Go": goFlagsConfig, + "D": &deprecatedConfig{}, + } + + return NewGinkgoFlagSet(flags, bindings, FlagSections) +} + +// BuildBuildCommandFlagSet builds the FlagSet for the `ginkgo build` command +func BuildBuildCommandFlagSet(cliConfig *CLIConfig, goFlagsConfig *GoFlagsConfig) (GinkgoFlagSet, error) { + flags := GinkgoCLISharedFlags + flags = flags.CopyAppend(GoBuildFlags...) + flags = flags.CopyAppend(GoBuildOFlags...) + + bindings := map[string]any{ + "C": cliConfig, + "Go": goFlagsConfig, + "D": &deprecatedConfig{}, + } + + flagSections := make(GinkgoFlagSections, len(FlagSections)) + copy(flagSections, FlagSections) + for i := range flagSections { + if flagSections[i].Key == "multiple-suites" { + flagSections[i].Heading = "Building Multiple Suites" + } + if flagSections[i].Key == "go-build" { + flagSections[i] = GinkgoFlagSection{Key: "go-build", Style: "{{/}}", Heading: "Go Build Flags", + Description: "These flags are inherited from go build."} + } + } + + return NewGinkgoFlagSet(flags, bindings, flagSections) +} + +func BuildLabelsCommandFlagSet(cliConfig *CLIConfig) (GinkgoFlagSet, error) { + flags := GinkgoCLISharedFlags.SubsetWithNames("r", "skip-package") + + bindings := map[string]any{ + "C": cliConfig, + } + + flagSections := make(GinkgoFlagSections, len(FlagSections)) + copy(flagSections, FlagSections) + for i := range flagSections { + if flagSections[i].Key == "multiple-suites" { + flagSections[i].Heading = "Fetching Labels from Multiple Suites" + } + } + + return NewGinkgoFlagSet(flags, bindings, flagSections) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/types/deprecated_types.go b/backend/vendor/github.com/onsi/ginkgo/v2/types/deprecated_types.go new file mode 100644 index 0000000..518989a --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/types/deprecated_types.go @@ -0,0 +1,141 @@ +package types + +import ( + "strconv" + "time" +) + +/* + A set of deprecations to make the transition from v1 to v2 easier for users who have written custom reporters. +*/ + +type SuiteSummary = DeprecatedSuiteSummary +type SetupSummary = DeprecatedSetupSummary +type SpecSummary = DeprecatedSpecSummary +type SpecMeasurement = DeprecatedSpecMeasurement +type SpecComponentType = NodeType +type SpecFailure = DeprecatedSpecFailure + +var ( + SpecComponentTypeInvalid = NodeTypeInvalid + SpecComponentTypeContainer = NodeTypeContainer + SpecComponentTypeIt = NodeTypeIt + SpecComponentTypeBeforeEach = NodeTypeBeforeEach + SpecComponentTypeJustBeforeEach = NodeTypeJustBeforeEach + SpecComponentTypeAfterEach = NodeTypeAfterEach + SpecComponentTypeJustAfterEach = NodeTypeJustAfterEach + SpecComponentTypeBeforeSuite = NodeTypeBeforeSuite + SpecComponentTypeSynchronizedBeforeSuite = NodeTypeSynchronizedBeforeSuite + SpecComponentTypeAfterSuite = NodeTypeAfterSuite + SpecComponentTypeSynchronizedAfterSuite = NodeTypeSynchronizedAfterSuite +) + +type DeprecatedSuiteSummary struct { + SuiteDescription string + SuiteSucceeded bool + SuiteID string + + NumberOfSpecsBeforeParallelization int + NumberOfTotalSpecs int + NumberOfSpecsThatWillBeRun int + NumberOfPendingSpecs int + NumberOfSkippedSpecs int + NumberOfPassedSpecs int + NumberOfFailedSpecs int + NumberOfFlakedSpecs int + RunTime time.Duration +} + +type DeprecatedSetupSummary struct { + ComponentType SpecComponentType + CodeLocation CodeLocation + + State SpecState + RunTime time.Duration + Failure SpecFailure + + CapturedOutput string + SuiteID string +} + +type DeprecatedSpecSummary struct { + ComponentTexts []string + ComponentCodeLocations []CodeLocation + + State SpecState + RunTime time.Duration + Failure SpecFailure + IsMeasurement bool + NumberOfSamples int + Measurements map[string]*DeprecatedSpecMeasurement + + CapturedOutput string + SuiteID string +} + +func (s DeprecatedSpecSummary) HasFailureState() bool { + return s.State.Is(SpecStateFailureStates) +} + +func (s DeprecatedSpecSummary) TimedOut() bool { + return false +} + +func (s DeprecatedSpecSummary) Panicked() bool { + return s.State == SpecStatePanicked +} + +func (s DeprecatedSpecSummary) Failed() bool { + return s.State == SpecStateFailed +} + +func (s DeprecatedSpecSummary) Passed() bool { + return s.State == SpecStatePassed +} + +func (s DeprecatedSpecSummary) Skipped() bool { + return s.State == SpecStateSkipped +} + +func (s DeprecatedSpecSummary) Pending() bool { + return s.State == SpecStatePending +} + +type DeprecatedSpecFailure struct { + Message string + Location CodeLocation + ForwardedPanic string + + ComponentIndex int + ComponentType SpecComponentType + ComponentCodeLocation CodeLocation +} + +type DeprecatedSpecMeasurement struct { + Name string + Info any + Order int + + Results []float64 + + Smallest float64 + Largest float64 + Average float64 + StdDeviation float64 + + SmallestLabel string + LargestLabel string + AverageLabel string + Units string + Precision int +} + +func (s DeprecatedSpecMeasurement) PrecisionFmt() string { + if s.Precision == 0 { + return "%f" + } + + str := strconv.Itoa(s.Precision) + + return "%." + str + "f" +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/types/deprecation_support.go b/backend/vendor/github.com/onsi/ginkgo/v2/types/deprecation_support.go new file mode 100644 index 0000000..e2519f6 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/types/deprecation_support.go @@ -0,0 +1,177 @@ +package types + +import ( + "os" + "strconv" + "strings" + "sync" + "unicode" + + "github.com/onsi/ginkgo/v2/formatter" +) + +type Deprecation struct { + Message string + DocLink string + Version string +} + +type deprecations struct{} + +var Deprecations = deprecations{} + +func (d deprecations) CustomReporter() Deprecation { + return Deprecation{ + Message: "Support for custom reporters has been removed in V2. Please read the documentation linked to below for Ginkgo's new behavior and for a migration path:", + DocLink: "removed-custom-reporters", + Version: "1.16.0", + } +} + +func (d deprecations) Async() Deprecation { + return Deprecation{ + Message: "You are passing a Done channel to a test node to test asynchronous behavior. This is deprecated in Ginkgo V2. Your test will run synchronously and the timeout will be ignored.", + DocLink: "removed-async-testing", + Version: "1.16.0", + } +} + +func (d deprecations) Measure() Deprecation { + return Deprecation{ + Message: "Measure is deprecated and has been removed from Ginkgo V2. Any Measure tests in your spec will not run. Please migrate to gomega/gmeasure.", + DocLink: "removed-measure", + Version: "1.16.3", + } +} + +func (d deprecations) ParallelNode() Deprecation { + return Deprecation{ + Message: "GinkgoParallelNode is deprecated and will be removed in Ginkgo V2. Please use GinkgoParallelProcess instead.", + DocLink: "renamed-ginkgoparallelnode", + Version: "1.16.4", + } +} + +func (d deprecations) CurrentGinkgoTestDescription() Deprecation { + return Deprecation{ + Message: "CurrentGinkgoTestDescription() is deprecated in Ginkgo V2. Use CurrentSpecReport() instead.", + DocLink: "changed-currentginkgotestdescription", + Version: "1.16.0", + } +} + +func (d deprecations) Convert() Deprecation { + return Deprecation{ + Message: "The convert command is deprecated in Ginkgo V2", + DocLink: "removed-ginkgo-convert", + Version: "1.16.0", + } +} + +func (d deprecations) Blur() Deprecation { + return Deprecation{ + Message: "The blur command is deprecated in Ginkgo V2. Use 'ginkgo unfocus' instead.", + Version: "1.16.0", + } +} + +func (d deprecations) Nodot() Deprecation { + return Deprecation{ + Message: "The nodot command is deprecated in Ginkgo V2. Please either dot-import Ginkgo or use the package identifier in your code to references objects and types provided by Ginkgo and Gomega.", + DocLink: "removed-ginkgo-nodot", + Version: "1.16.0", + } +} + +func (d deprecations) SuppressProgressReporting() Deprecation { + return Deprecation{ + Message: "Improvements to how reporters emit timeline information means that SuppressProgressReporting is no longer necessary and has been deprecated.", + Version: "2.5.0", + } +} + +type DeprecationTracker struct { + deprecations map[Deprecation][]CodeLocation + lock *sync.Mutex +} + +func NewDeprecationTracker() *DeprecationTracker { + return &DeprecationTracker{ + deprecations: map[Deprecation][]CodeLocation{}, + lock: &sync.Mutex{}, + } +} + +func (d *DeprecationTracker) TrackDeprecation(deprecation Deprecation, cl ...CodeLocation) { + ackVersion := os.Getenv("ACK_GINKGO_DEPRECATIONS") + if deprecation.Version != "" && ackVersion != "" { + ack := ParseSemVer(ackVersion) + version := ParseSemVer(deprecation.Version) + if ack.GreaterThanOrEqualTo(version) { + return + } + } + + d.lock.Lock() + defer d.lock.Unlock() + if len(cl) == 1 { + d.deprecations[deprecation] = append(d.deprecations[deprecation], cl[0]) + } else { + d.deprecations[deprecation] = []CodeLocation{} + } +} + +func (d *DeprecationTracker) DidTrackDeprecations() bool { + d.lock.Lock() + defer d.lock.Unlock() + return len(d.deprecations) > 0 +} + +func (d *DeprecationTracker) DeprecationsReport() string { + d.lock.Lock() + defer d.lock.Unlock() + out := formatter.F("{{light-yellow}}You're using deprecated Ginkgo functionality:{{/}}\n") + out += formatter.F("{{light-yellow}}============================================={{/}}\n") + for deprecation, locations := range d.deprecations { + out += formatter.Fi(1, "{{yellow}}"+deprecation.Message+"{{/}}\n") + if deprecation.DocLink != "" { + out += formatter.Fi(1, "{{bold}}Learn more at:{{/}} {{cyan}}{{underline}}https://onsi.github.io/ginkgo/MIGRATING_TO_V2#%s{{/}}\n", deprecation.DocLink) + } + for _, location := range locations { + out += formatter.Fi(2, "{{gray}}%s{{/}}\n", location) + } + } + out += formatter.F("\n{{gray}}To silence deprecations that can be silenced set the following environment variable:{{/}}\n") + out += formatter.Fi(1, "{{gray}}ACK_GINKGO_DEPRECATIONS=%s{{/}}\n", VERSION) + return out +} + +type SemVer struct { + Major int + Minor int + Patch int +} + +func (s SemVer) GreaterThanOrEqualTo(o SemVer) bool { + return (s.Major > o.Major) || + (s.Major == o.Major && s.Minor > o.Minor) || + (s.Major == o.Major && s.Minor == o.Minor && s.Patch >= o.Patch) +} + +func ParseSemVer(semver string) SemVer { + out := SemVer{} + semver = strings.TrimFunc(semver, func(r rune) bool { + return !(unicode.IsNumber(r) || r == '.') + }) + components := strings.Split(semver, ".") + if len(components) > 0 { + out.Major, _ = strconv.Atoi(components[0]) + } + if len(components) > 1 { + out.Minor, _ = strconv.Atoi(components[1]) + } + if len(components) > 2 { + out.Patch, _ = strconv.Atoi(components[2]) + } + return out +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/types/enum_support.go b/backend/vendor/github.com/onsi/ginkgo/v2/types/enum_support.go new file mode 100644 index 0000000..1d96ae0 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/types/enum_support.go @@ -0,0 +1,43 @@ +package types + +import "encoding/json" + +type EnumSupport struct { + toString map[uint]string + toEnum map[string]uint + maxEnum uint +} + +func NewEnumSupport(toString map[uint]string) EnumSupport { + toEnum, maxEnum := map[string]uint{}, uint(0) + for k, v := range toString { + toEnum[v] = k + if maxEnum < k { + maxEnum = k + } + } + return EnumSupport{toString: toString, toEnum: toEnum, maxEnum: maxEnum} +} + +func (es EnumSupport) String(e uint) string { + if e > es.maxEnum { + return es.toString[0] + } + return es.toString[e] +} + +func (es EnumSupport) UnmarshJSON(b []byte) (uint, error) { + var dec string + if err := json.Unmarshal(b, &dec); err != nil { + return 0, err + } + out := es.toEnum[dec] // if we miss we get 0 which is what we want anyway + return out, nil +} + +func (es EnumSupport) MarshJSON(e uint) ([]byte, error) { + if e == 0 || e > es.maxEnum { + return json.Marshal(nil) + } + return json.Marshal(es.toString[e]) +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/types/errors.go b/backend/vendor/github.com/onsi/ginkgo/v2/types/errors.go new file mode 100644 index 0000000..5931323 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/types/errors.go @@ -0,0 +1,671 @@ +package types + +import ( + "fmt" + "reflect" + "strings" + + "github.com/onsi/ginkgo/v2/formatter" +) + +type GinkgoError struct { + Heading string + Message string + DocLink string + CodeLocation CodeLocation +} + +func (g GinkgoError) Error() string { + out := formatter.F("{{bold}}{{red}}%s{{/}}\n", g.Heading) + if (g.CodeLocation != CodeLocation{}) { + contentsOfLine := strings.TrimLeft(g.CodeLocation.ContentsOfLine(), "\t ") + if contentsOfLine != "" { + out += formatter.F("{{light-gray}}%s{{/}}\n", contentsOfLine) + } + out += formatter.F("{{gray}}%s{{/}}\n", g.CodeLocation) + } + if g.Message != "" { + out += formatter.Fiw(1, formatter.COLS, g.Message) + out += "\n\n" + } + if g.DocLink != "" { + out += formatter.Fiw(1, formatter.COLS, "{{bold}}Learn more at:{{/}} {{cyan}}{{underline}}http://onsi.github.io/ginkgo/#%s{{/}}\n", g.DocLink) + } + + return out +} + +type ginkgoErrors struct{} + +var GinkgoErrors = ginkgoErrors{} + +func (g ginkgoErrors) UncaughtGinkgoPanic(cl CodeLocation) error { + return GinkgoError{ + Heading: "Your Test Panicked", + Message: `When you, or your assertion library, calls Ginkgo's Fail(), +Ginkgo panics to prevent subsequent assertions from running. + +Normally Ginkgo rescues this panic so you shouldn't see it. + +However, if you make an assertion in a goroutine, Ginkgo can't capture the panic. +To circumvent this, you should call + + defer GinkgoRecover() + +at the top of the goroutine that caused this panic. + +Alternatively, you may have made an assertion outside of a Ginkgo +leaf node (e.g. in a container node or some out-of-band function) - please move your assertion to +an appropriate Ginkgo node (e.g. a BeforeSuite, BeforeEach, It, etc...).`, + DocLink: "mental-model-how-ginkgo-handles-failure", + CodeLocation: cl, + } +} + +func (g ginkgoErrors) RerunningSuite() error { + return GinkgoError{ + Heading: "Rerunning Suite", + Message: formatter.F(`It looks like you are calling RunSpecs more than once. Ginkgo does not support rerunning suites. If you want to rerun a suite try {{bold}}ginkgo --repeat=N{{/}} or {{bold}}ginkgo --until-it-fails{{/}}`), + DocLink: "repeating-spec-runs-and-managing-flaky-specs", + } +} + +/* Tree construction errors */ + +func (g ginkgoErrors) PushingNodeInRunPhase(nodeType NodeType, cl CodeLocation) error { + return GinkgoError{ + Heading: "Ginkgo detected an issue with your spec structure", + Message: formatter.F( + `It looks like you are trying to add a {{bold}}[%s]{{/}} node +to the Ginkgo spec tree in a leaf node {{bold}}after{{/}} the specs started running. + +To enable randomization and parallelization Ginkgo requires the spec tree +to be fully constructed up front. In practice, this means that you can +only create nodes like {{bold}}[%s]{{/}} at the top-level or within the +body of a {{bold}}Describe{{/}}, {{bold}}Context{{/}}, or {{bold}}When{{/}}.`, nodeType, nodeType), + CodeLocation: cl, + DocLink: "mental-model-how-ginkgo-traverses-the-spec-hierarchy", + } +} + +func (g ginkgoErrors) CaughtPanicDuringABuildPhase(caughtPanic any, cl CodeLocation) error { + return GinkgoError{ + Heading: "Assertion or Panic detected during tree construction", + Message: formatter.F( + `Ginkgo detected a panic while constructing the spec tree. +You may be trying to make an assertion in the body of a container node +(i.e. {{bold}}Describe{{/}}, {{bold}}Context{{/}}, or {{bold}}When{{/}}). + +Please ensure all assertions are inside leaf nodes such as {{bold}}BeforeEach{{/}}, +{{bold}}It{{/}}, etc. + +{{bold}}Here's the content of the panic that was caught:{{/}} +%v`, caughtPanic), + CodeLocation: cl, + DocLink: "no-assertions-in-container-nodes", + } +} + +func (g ginkgoErrors) SuiteNodeInNestedContext(nodeType NodeType, cl CodeLocation) error { + docLink := "suite-setup-and-cleanup-beforesuite-and-aftersuite" + if nodeType.Is(NodeTypeReportBeforeSuite | NodeTypeReportAfterSuite) { + docLink = "reporting-nodes---reportbeforesuite-and-reportaftersuite" + } + + return GinkgoError{ + Heading: "Ginkgo detected an issue with your spec structure", + Message: formatter.F( + `It looks like you are trying to add a {{bold}}[%s]{{/}} node within a container node. + +{{bold}}%s{{/}} can only be called at the top level.`, nodeType, nodeType), + CodeLocation: cl, + DocLink: docLink, + } +} + +func (g ginkgoErrors) SuiteNodeDuringRunPhase(nodeType NodeType, cl CodeLocation) error { + docLink := "suite-setup-and-cleanup-beforesuite-and-aftersuite" + if nodeType.Is(NodeTypeReportBeforeSuite | NodeTypeReportAfterSuite) { + docLink = "reporting-nodes---reportbeforesuite-and-reportaftersuite" + } + + return GinkgoError{ + Heading: "Ginkgo detected an issue with your spec structure", + Message: formatter.F( + `It looks like you are trying to add a {{bold}}[%s]{{/}} node within a leaf node after the spec started running. + +{{bold}}%s{{/}} can only be called at the top level.`, nodeType, nodeType), + CodeLocation: cl, + DocLink: docLink, + } +} + +func (g ginkgoErrors) MultipleBeforeSuiteNodes(nodeType NodeType, cl CodeLocation, earlierNodeType NodeType, earlierCodeLocation CodeLocation) error { + return ginkgoErrorMultipleSuiteNodes("setup", nodeType, cl, earlierNodeType, earlierCodeLocation) +} + +func (g ginkgoErrors) MultipleAfterSuiteNodes(nodeType NodeType, cl CodeLocation, earlierNodeType NodeType, earlierCodeLocation CodeLocation) error { + return ginkgoErrorMultipleSuiteNodes("teardown", nodeType, cl, earlierNodeType, earlierCodeLocation) +} + +func ginkgoErrorMultipleSuiteNodes(setupOrTeardown string, nodeType NodeType, cl CodeLocation, earlierNodeType NodeType, earlierCodeLocation CodeLocation) error { + return GinkgoError{ + Heading: "Ginkgo detected an issue with your spec structure", + Message: formatter.F( + `It looks like you are trying to add a {{bold}}[%s]{{/}} node but +you already have a {{bold}}[%s]{{/}} node defined at: {{gray}}%s{{/}}. + +Ginkgo only allows you to define one suite %s node.`, nodeType, earlierNodeType, earlierCodeLocation, setupOrTeardown), + CodeLocation: cl, + DocLink: "suite-setup-and-cleanup-beforesuite-and-aftersuite", + } +} + +/* Decorator errors */ +func (g ginkgoErrors) InvalidDecoratorForNodeType(cl CodeLocation, nodeType NodeType, decorator string) error { + return GinkgoError{ + Heading: "Invalid Decorator", + Message: formatter.F(`[%s] node cannot be passed a(n) '%s' decorator`, nodeType, decorator), + CodeLocation: cl, + DocLink: "node-decorators-overview", + } +} + +func (g ginkgoErrors) InvalidDeclarationOfFocusedAndPending(cl CodeLocation, nodeType NodeType) error { + return GinkgoError{ + Heading: "Invalid Combination of Decorators: Focused and Pending", + Message: formatter.F(`[%s] node was decorated with both Focus and Pending. At most one is allowed.`, nodeType), + CodeLocation: cl, + DocLink: "node-decorators-overview", + } +} + +func (g ginkgoErrors) InvalidDeclarationOfFlakeAttemptsAndMustPassRepeatedly(cl CodeLocation, nodeType NodeType) error { + return GinkgoError{ + Heading: "Invalid Combination of Decorators: FlakeAttempts and MustPassRepeatedly", + Message: formatter.F(`[%s] node was decorated with both FlakeAttempts and MustPassRepeatedly. At most one is allowed.`, nodeType), + CodeLocation: cl, + DocLink: "node-decorators-overview", + } +} + +func (g ginkgoErrors) UnknownDecorator(cl CodeLocation, nodeType NodeType, decorator any) error { + return GinkgoError{ + Heading: "Unknown Decorator", + Message: formatter.F(`[%s] node was passed an unknown decorator: '%#v'`, nodeType, decorator), + CodeLocation: cl, + DocLink: "node-decorators-overview", + } +} + +func (g ginkgoErrors) InvalidBodyTypeForContainer(t reflect.Type, cl CodeLocation, nodeType NodeType) error { + return GinkgoError{ + Heading: "Invalid Function", + Message: formatter.F(`[%s] node must be passed {{bold}}func(){{/}} - i.e. functions that take nothing and return nothing. You passed {{bold}}%s{{/}} instead.`, nodeType, t), + CodeLocation: cl, + DocLink: "node-decorators-overview", + } +} + +func (g ginkgoErrors) InvalidBodyType(t reflect.Type, cl CodeLocation, nodeType NodeType) error { + mustGet := "{{bold}}func(){{/}}, {{bold}}func(ctx SpecContext){{/}}, or {{bold}}func(ctx context.Context){{/}}" + if nodeType.Is(NodeTypeContainer) { + mustGet = "{{bold}}func(){{/}}" + } + return GinkgoError{ + Heading: "Invalid Function", + Message: formatter.F(`[%s] node must be passed `+mustGet+`. +You passed {{bold}}%s{{/}} instead.`, nodeType, t), + CodeLocation: cl, + DocLink: "node-decorators-overview", + } +} + +func (g ginkgoErrors) InvalidBodyTypeForSynchronizedBeforeSuiteProc1(t reflect.Type, cl CodeLocation) error { + mustGet := "{{bold}}func() []byte{{/}}, {{bold}}func(ctx SpecContext) []byte{{/}}, or {{bold}}func(ctx context.Context) []byte{{/}}, {{bold}}func(){{/}}, {{bold}}func(ctx SpecContext){{/}}, or {{bold}}func(ctx context.Context){{/}}" + return GinkgoError{ + Heading: "Invalid Function", + Message: formatter.F(`[SynchronizedBeforeSuite] node must be passed `+mustGet+` for its first function. +You passed {{bold}}%s{{/}} instead.`, t), + CodeLocation: cl, + DocLink: "node-decorators-overview", + } +} + +func (g ginkgoErrors) InvalidBodyTypeForSynchronizedBeforeSuiteAllProcs(t reflect.Type, cl CodeLocation) error { + mustGet := "{{bold}}func(){{/}}, {{bold}}func(ctx SpecContext){{/}}, or {{bold}}func(ctx context.Context){{/}}, {{bold}}func([]byte){{/}}, {{bold}}func(ctx SpecContext, []byte){{/}}, or {{bold}}func(ctx context.Context, []byte){{/}}" + return GinkgoError{ + Heading: "Invalid Function", + Message: formatter.F(`[SynchronizedBeforeSuite] node must be passed `+mustGet+` for its second function. +You passed {{bold}}%s{{/}} instead.`, t), + CodeLocation: cl, + DocLink: "node-decorators-overview", + } +} + +func (g ginkgoErrors) MultipleBodyFunctions(cl CodeLocation, nodeType NodeType) error { + return GinkgoError{ + Heading: "Multiple Functions", + Message: formatter.F(`[%s] node must be passed a single function - but more than one was passed in.`, nodeType), + CodeLocation: cl, + DocLink: "node-decorators-overview", + } +} + +func (g ginkgoErrors) MissingBodyFunction(cl CodeLocation, nodeType NodeType) error { + return GinkgoError{ + Heading: "Missing Functions", + Message: formatter.F(`[%s] node must be passed a single function - but none was passed in.`, nodeType), + CodeLocation: cl, + DocLink: "node-decorators-overview", + } +} + +func (g ginkgoErrors) InvalidTimeoutOrGracePeriodForNonContextNode(cl CodeLocation, nodeType NodeType) error { + return GinkgoError{ + Heading: "Invalid NodeTimeout SpecTimeout, or GracePeriod", + Message: formatter.F(`[%s] was passed NodeTimeout, SpecTimeout, or GracePeriod but does not have a callback that accepts a {{bold}}SpecContext{{/}} or {{bold}}context.Context{{/}}. You must accept a context to enable timeouts and grace periods`, nodeType), + CodeLocation: cl, + DocLink: "spec-timeouts-and-interruptible-nodes", + } +} + +func (g ginkgoErrors) InvalidTimeoutOrGracePeriodForNonContextCleanupNode(cl CodeLocation) error { + return GinkgoError{ + Heading: "Invalid NodeTimeout SpecTimeout, or GracePeriod", + Message: formatter.F(`[DeferCleanup] was passed NodeTimeout or GracePeriod but does not have a callback that accepts a {{bold}}SpecContext{{/}} or {{bold}}context.Context{{/}}. You must accept a context to enable timeouts and grace periods`), + CodeLocation: cl, + DocLink: "spec-timeouts-and-interruptible-nodes", + } +} + +/* Ordered Container errors */ +func (g ginkgoErrors) InvalidSerialNodeInNonSerialOrderedContainer(cl CodeLocation, nodeType NodeType) error { + return GinkgoError{ + Heading: "Invalid Serial Node in Non-Serial Ordered Container", + Message: formatter.F(`[%s] node was decorated with Serial but occurs in an Ordered container that is not marked Serial. Move the Serial decorator to the outer-most Ordered container to mark all ordered specs within the container as serial.`, nodeType), + CodeLocation: cl, + DocLink: "node-decorators-overview", + } +} + +func (g ginkgoErrors) SetupNodeNotInOrderedContainer(cl CodeLocation, nodeType NodeType) error { + return GinkgoError{ + Heading: "Setup Node not in Ordered Container", + Message: fmt.Sprintf("[%s] setup nodes must appear inside an Ordered container. They cannot be nested within other containers, even containers in an ordered container.", nodeType), + CodeLocation: cl, + DocLink: "ordered-containers", + } +} + +func (g ginkgoErrors) InvalidContinueOnFailureDecoration(cl CodeLocation) error { + return GinkgoError{ + Heading: "ContinueOnFailure not decorating an outermost Ordered Container", + Message: "ContinueOnFailure can only decorate an Ordered container, and this Ordered container must be the outermost Ordered container.", + CodeLocation: cl, + DocLink: "ordered-containers", + } +} + +/* DeferCleanup errors */ +func (g ginkgoErrors) DeferCleanupInvalidFunction(cl CodeLocation) error { + return GinkgoError{ + Heading: "DeferCleanup requires a valid function", + Message: "You must pass DeferCleanup a function to invoke. This function must return zero or one values - if it does return, it must return an error. The function can take arbitrarily many arguments and you should provide these to DeferCleanup to pass along to the function.", + CodeLocation: cl, + DocLink: "cleaning-up-our-cleanup-code-defercleanup", + } +} + +func (g ginkgoErrors) PushingCleanupNodeDuringTreeConstruction(cl CodeLocation) error { + return GinkgoError{ + Heading: "DeferCleanup must be called inside a setup or subject node", + Message: "You must call DeferCleanup inside a setup node (e.g. BeforeEach, BeforeSuite, AfterAll...) or a subject node (i.e. It). You can't call DeferCleanup at the top-level or in a container node - use the After* family of setup nodes instead.", + CodeLocation: cl, + DocLink: "cleaning-up-our-cleanup-code-defercleanup", + } +} + +func (g ginkgoErrors) PushingCleanupInReportingNode(cl CodeLocation, nodeType NodeType) error { + return GinkgoError{ + Heading: fmt.Sprintf("DeferCleanup cannot be called in %s", nodeType), + Message: "Please inline your cleanup code - Ginkgo won't run cleanup code after a Reporting node.", + CodeLocation: cl, + DocLink: "cleaning-up-our-cleanup-code-defercleanup", + } +} + +func (g ginkgoErrors) PushingCleanupInCleanupNode(cl CodeLocation) error { + return GinkgoError{ + Heading: "DeferCleanup cannot be called in a DeferCleanup callback", + Message: "Please inline your cleanup code - Ginkgo doesn't let you call DeferCleanup from within DeferCleanup", + CodeLocation: cl, + DocLink: "cleaning-up-our-cleanup-code-defercleanup", + } +} + +/* ReportEntry errors */ +func (g ginkgoErrors) TooManyReportEntryValues(cl CodeLocation, arg any) error { + return GinkgoError{ + Heading: "Too Many ReportEntry Values", + Message: formatter.F(`{{bold}}AddGinkgoReport{{/}} can only be given one value. Got unexpected value: %#v`, arg), + CodeLocation: cl, + DocLink: "attaching-data-to-reports", + } +} + +func (g ginkgoErrors) AddReportEntryNotDuringRunPhase(cl CodeLocation) error { + return GinkgoError{ + Heading: "Ginkgo detected an issue with your spec structure", + Message: formatter.F(`It looks like you are calling {{bold}}AddGinkgoReport{{/}} outside of a running spec. Make sure you call {{bold}}AddGinkgoReport{{/}} inside a runnable node such as It or BeforeEach and not inside the body of a container such as Describe or Context.`), + CodeLocation: cl, + DocLink: "attaching-data-to-reports", + } +} + +/* By errors */ +func (g ginkgoErrors) ByNotDuringRunPhase(cl CodeLocation) error { + return GinkgoError{ + Heading: "Ginkgo detected an issue with your spec structure", + Message: formatter.F(`It looks like you are calling {{bold}}By{{/}} outside of a running spec. Make sure you call {{bold}}By{{/}} inside a runnable node such as It or BeforeEach and not inside the body of a container such as Describe or Context.`), + CodeLocation: cl, + DocLink: "documenting-complex-specs-by", + } +} + +/* FileFilter and SkipFilter errors */ +func (g ginkgoErrors) InvalidFileFilter(filter string) error { + return GinkgoError{ + Heading: "Invalid File Filter", + Message: fmt.Sprintf(`The provided file filter: "%s" is invalid. File filters must have the format "file", "file:lines" where "file" is a regular expression that will match against the file path and lines is a comma-separated list of integers (e.g. file:1,5,7) or line-ranges (e.g. file:1-3,5-9) or both (e.g. file:1,5-9)`, filter), + DocLink: "filtering-specs", + } +} + +func (g ginkgoErrors) InvalidFileFilterRegularExpression(filter string, err error) error { + return GinkgoError{ + Heading: "Invalid File Filter Regular Expression", + Message: fmt.Sprintf(`The provided file filter: "%s" included an invalid regular expression. regexp.Compile error: %s`, filter, err), + DocLink: "filtering-specs", + } +} + +/* Label Errors */ +func (g ginkgoErrors) SyntaxErrorParsingLabelFilter(input string, location int, error string) error { + var message string + if location >= 0 { + for i, r := range input { + if i == location { + message += "{{red}}{{bold}}{{underline}}" + } + message += string(r) + if i == location { + message += "{{/}}" + } + } + } else { + message = input + } + message += "\n" + error + return GinkgoError{ + Heading: "Syntax Error Parsing Label Filter", + Message: message, + DocLink: "spec-labels", + } +} + +func (g ginkgoErrors) InvalidLabel(label string, cl CodeLocation) error { + return GinkgoError{ + Heading: "Invalid Label", + Message: fmt.Sprintf("'%s' is an invalid label. Labels cannot contain of the following characters: '&|!,()/'", label), + CodeLocation: cl, + DocLink: "spec-labels", + } +} + +func (g ginkgoErrors) InvalidEmptyLabel(cl CodeLocation) error { + return GinkgoError{ + Heading: "Invalid Empty Label", + Message: "Labels cannot be empty", + CodeLocation: cl, + DocLink: "spec-labels", + } +} + +func (g ginkgoErrors) InvalidSemVerConstraint(semVerConstraint, errMsg string, cl CodeLocation) error { + return GinkgoError{ + Heading: "Invalid SemVerConstraint", + Message: fmt.Sprintf("'%s' is an invalid SemVerConstraint: %s", semVerConstraint, errMsg), + CodeLocation: cl, + DocLink: "spec-semantic-version-filtering", + } +} + +func (g ginkgoErrors) InvalidEmptySemVerConstraint(cl CodeLocation) error { + return GinkgoError{ + Heading: "Invalid Empty SemVerConstraint", + Message: "SemVerConstraint cannot be empty", + CodeLocation: cl, + DocLink: "spec-semantic-version-filtering", + } +} + +/* Table errors */ +func (g ginkgoErrors) MultipleEntryBodyFunctionsForTable(cl CodeLocation) error { + return GinkgoError{ + Heading: "DescribeTable passed multiple functions", + Message: "It looks like you are passing multiple functions into DescribeTable. Only one function can be passed in. This function will be called for each Entry in the table.", + CodeLocation: cl, + DocLink: "table-specs", + } +} + +func (g ginkgoErrors) InvalidEntryDescription(cl CodeLocation) error { + return GinkgoError{ + Heading: "Invalid Entry description", + Message: "Entry description functions must be a string, a function that accepts the entry parameters and returns a string, or nil.", + CodeLocation: cl, + DocLink: "table-specs", + } +} + +func (g ginkgoErrors) MissingParametersForTableFunction(cl CodeLocation) error { + return GinkgoError{ + Heading: "No parameters have been passed to the Table Function", + Message: "The Table Function expected at least 1 parameter", + CodeLocation: cl, + DocLink: "table-specs", + } +} + +func (g ginkgoErrors) IncorrectParameterTypeForTable(i int, name string, cl CodeLocation) error { + return GinkgoError{ + Heading: "DescribeTable passed incorrect parameter type", + Message: fmt.Sprintf("Parameter #%d passed to DescribeTable is of incorrect type <%s>", i, name), + CodeLocation: cl, + DocLink: "table-specs", + } +} + +func (g ginkgoErrors) TooFewParametersToTableFunction(expected, actual int, kind string, cl CodeLocation) error { + return GinkgoError{ + Heading: fmt.Sprintf("Too few parameters passed in to %s", kind), + Message: fmt.Sprintf("The %s expected %d parameters but you passed in %d", kind, expected, actual), + CodeLocation: cl, + DocLink: "table-specs", + } +} + +func (g ginkgoErrors) TooManyParametersToTableFunction(expected, actual int, kind string, cl CodeLocation) error { + return GinkgoError{ + Heading: fmt.Sprintf("Too many parameters passed in to %s", kind), + Message: fmt.Sprintf("The %s expected %d parameters but you passed in %d", kind, expected, actual), + CodeLocation: cl, + DocLink: "table-specs", + } +} + +func (g ginkgoErrors) IncorrectParameterTypeToTableFunction(i int, expected, actual reflect.Type, kind string, cl CodeLocation) error { + return GinkgoError{ + Heading: fmt.Sprintf("Incorrect parameters type passed to %s", kind), + Message: fmt.Sprintf("The %s expected parameter #%d to be of type <%s> but you passed in <%s>", kind, i, expected, actual), + CodeLocation: cl, + DocLink: "table-specs", + } +} + +func (g ginkgoErrors) IncorrectVariadicParameterTypeToTableFunction(expected, actual reflect.Type, kind string, cl CodeLocation) error { + return GinkgoError{ + Heading: fmt.Sprintf("Incorrect parameters type passed to %s", kind), + Message: fmt.Sprintf("The %s expected its variadic parameters to be of type <%s> but you passed in <%s>", kind, expected, actual), + CodeLocation: cl, + DocLink: "table-specs", + } +} + +func (g ginkgoErrors) ContextsCannotBeUsedInSubtreeTables(cl CodeLocation) error { + return GinkgoError{ + Heading: "Contexts cannot be used in subtree tables", + Message: "You''ve defined a subtree body function that accepts a context but did not provide one in the table entry. Ginkgo SpecContexts can only be passed in to subject and setup nodes - so if you are trying to implement a spec timeout you should request a context in the It function within your subtree body function, not in the subtree body function itself.", + CodeLocation: cl, + DocLink: "table-specs", + } +} + +/* Parallel Synchronization errors */ + +func (g ginkgoErrors) AggregatedReportUnavailableDueToNodeDisappearing() error { + return GinkgoError{ + Heading: "Test Report unavailable because a Ginkgo parallel process disappeared", + Message: "The aggregated report could not be fetched for a ReportAfterSuite node. A Ginkgo parallel process disappeared before it could finish reporting.", + } +} + +func (g ginkgoErrors) SynchronizedBeforeSuiteFailedOnProc1() error { + return GinkgoError{ + Heading: "SynchronizedBeforeSuite failed on Ginkgo parallel process #1", + Message: "The first SynchronizedBeforeSuite function running on Ginkgo parallel process #1 failed. This suite will now abort.", + } +} + +func (g ginkgoErrors) SynchronizedBeforeSuiteDisappearedOnProc1() error { + return GinkgoError{ + Heading: "Process #1 disappeared before SynchronizedBeforeSuite could report back", + Message: "Ginkgo parallel process #1 disappeared before the first SynchronizedBeforeSuite function completed. This suite will now abort.", + } +} + +/* Configuration errors */ + +func (g ginkgoErrors) UnknownTypePassedToRunSpecs(value any) error { + return GinkgoError{ + Heading: "Unknown Type passed to RunSpecs", + Message: fmt.Sprintf("RunSpecs() accepts labels, and configuration of type types.SuiteConfig and/or types.ReporterConfig.\n You passed in: %v", value), + } +} + +var sharedParallelErrorMessage = "It looks like you are trying to run specs in parallel with go test.\nThis is unsupported and you should use the ginkgo CLI instead." + +func (g ginkgoErrors) InvalidParallelTotalConfiguration() error { + return GinkgoError{ + Heading: "-ginkgo.parallel.total must be >= 1", + Message: sharedParallelErrorMessage, + DocLink: "spec-parallelization", + } +} + +func (g ginkgoErrors) InvalidParallelProcessConfiguration() error { + return GinkgoError{ + Heading: "-ginkgo.parallel.process is one-indexed and must be <= ginkgo.parallel.total", + Message: sharedParallelErrorMessage, + DocLink: "spec-parallelization", + } +} + +func (g ginkgoErrors) MissingParallelHostConfiguration() error { + return GinkgoError{ + Heading: "-ginkgo.parallel.host is missing", + Message: sharedParallelErrorMessage, + DocLink: "spec-parallelization", + } +} + +func (g ginkgoErrors) UnreachableParallelHost(host string) error { + return GinkgoError{ + Heading: "Could not reach ginkgo.parallel.host:" + host, + Message: sharedParallelErrorMessage, + DocLink: "spec-parallelization", + } +} + +func (g ginkgoErrors) DryRunInParallelConfiguration() error { + return GinkgoError{ + Heading: "Ginkgo only performs -dryRun in serial mode.", + Message: "Please try running ginkgo -dryRun again, but without -p or -procs to ensure the suite is running in series.", + } +} + +func (g ginkgoErrors) GracePeriodCannotBeZero() error { + return GinkgoError{ + Heading: "Ginkgo requires a positive --grace-period.", + Message: "Please set --grace-period to a positive duration. The default is 30s.", + } +} + +func (g ginkgoErrors) ConflictingVerbosityConfiguration() error { + return GinkgoError{ + Heading: "Conflicting reporter verbosity settings.", + Message: "You can't set more than one of -v, -vv and --succinct. Please pick one!", + } +} + +func (g ginkgoErrors) InvalidOutputInterceptorModeConfiguration(value string) error { + return GinkgoError{ + Heading: fmt.Sprintf("Invalid value '%s' for --output-interceptor-mode.", value), + Message: "You must choose one of 'dup', 'swap', or 'none'.", + } +} + +func (g ginkgoErrors) InvalidGoFlagCount() error { + return GinkgoError{ + Heading: "Use of go test -count", + Message: "Ginkgo does not support using go test -count to rerun suites. Only -count=1 is allowed. To repeat suite runs, please use the ginkgo cli and `ginkgo -until-it-fails` or `ginkgo -repeat=N`.", + } +} + +func (g ginkgoErrors) InvalidGoFlagParallel() error { + return GinkgoError{ + Heading: "Use of go test -parallel", + Message: "Go test's implementation of parallelization does not actually parallelize Ginkgo specs. Please use the ginkgo cli and `ginkgo -p` or `ginkgo -procs=N` instead.", + } +} + +func (g ginkgoErrors) BothRepeatAndUntilItFails() error { + return GinkgoError{ + Heading: "--repeat and --until-it-fails are both set", + Message: "--until-it-fails directs Ginkgo to rerun specs indefinitely until they fail. --repeat directs Ginkgo to rerun specs a set number of times. You can't set both... which would you like?", + } +} + +func (g ginkgoErrors) ExpectFilenameNotPath(flag string, path string) error { + return GinkgoError{ + Heading: fmt.Sprintf("%s expects a filename but was given a path: %s", flag, path), + Message: fmt.Sprintf("%s takes a filename, not a path. Use --output-dir to specify a directory to collect all test outputs.", flag), + } +} + +func (g ginkgoErrors) FlagAfterPositionalParameter() error { + return GinkgoError{ + Heading: "Malformed arguments - detected a flag after the package liste", + Message: "Make sure all flags appear {{bold}}after{{/}} the Ginkgo subcommand and {{bold}}before{{/}} your list of packages (or './...').\n{{gray}}e.g. 'ginkgo run -p my_package' is valid but `ginkgo -p run my_package` is not.\n{{gray}}e.g. 'ginkgo -p -vet=\"\" ./...' is valid but 'ginkgo -p ./... -vet=\"\"' is not{{/}}", + } +} + +/* Stack-Trace parsing errors */ + +func (g ginkgoErrors) FailedToParseStackTrace(message string) error { + return GinkgoError{ + Heading: "Failed to Parse Stack Trace", + Message: message, + } +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/types/file_filter.go b/backend/vendor/github.com/onsi/ginkgo/v2/types/file_filter.go new file mode 100644 index 0000000..cc21df7 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/types/file_filter.go @@ -0,0 +1,106 @@ +package types + +import ( + "regexp" + "strconv" + "strings" +) + +func ParseFileFilters(filters []string) (FileFilters, error) { + ffs := FileFilters{} + for _, filter := range filters { + ff := FileFilter{} + if filter == "" { + return nil, GinkgoErrors.InvalidFileFilter(filter) + } + components := strings.Split(filter, ":") + if !(len(components) == 1 || len(components) == 2) { + return nil, GinkgoErrors.InvalidFileFilter(filter) + } + + var err error + ff.Filename, err = regexp.Compile(components[0]) + if err != nil { + return nil, err + } + if len(components) == 2 { + lineFilters := strings.Split(components[1], ",") + for _, lineFilter := range lineFilters { + components := strings.Split(lineFilter, "-") + if len(components) == 1 { + line, err := strconv.Atoi(strings.TrimSpace(components[0])) + if err != nil { + return nil, GinkgoErrors.InvalidFileFilter(filter) + } + ff.LineFilters = append(ff.LineFilters, LineFilter{line, line + 1}) + } else if len(components) == 2 { + line1, err := strconv.Atoi(strings.TrimSpace(components[0])) + if err != nil { + return nil, GinkgoErrors.InvalidFileFilter(filter) + } + line2, err := strconv.Atoi(strings.TrimSpace(components[1])) + if err != nil { + return nil, GinkgoErrors.InvalidFileFilter(filter) + } + ff.LineFilters = append(ff.LineFilters, LineFilter{line1, line2}) + } else { + return nil, GinkgoErrors.InvalidFileFilter(filter) + } + } + } + ffs = append(ffs, ff) + } + return ffs, nil +} + +type FileFilter struct { + Filename *regexp.Regexp + LineFilters LineFilters +} + +func (f FileFilter) Matches(locations []CodeLocation) bool { + for _, location := range locations { + if f.Filename.MatchString(location.FileName) && + f.LineFilters.Matches(location.LineNumber) { + return true + } + + } + return false +} + +type FileFilters []FileFilter + +func (ffs FileFilters) Matches(locations []CodeLocation) bool { + for _, ff := range ffs { + if ff.Matches(locations) { + return true + } + } + + return false +} + +type LineFilter struct { + Min int + Max int +} + +func (lf LineFilter) Matches(line int) bool { + return lf.Min <= line && line < lf.Max +} + +type LineFilters []LineFilter + +func (lfs LineFilters) Matches(line int) bool { + if len(lfs) == 0 { + return true + } + + for _, lf := range lfs { + if lf.Matches(line) { + return true + } + } + return false +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/types/flags.go b/backend/vendor/github.com/onsi/ginkgo/v2/types/flags.go new file mode 100644 index 0000000..8409653 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/types/flags.go @@ -0,0 +1,490 @@ +package types + +import ( + "flag" + "fmt" + "io" + "reflect" + "strings" + "time" + + "github.com/onsi/ginkgo/v2/formatter" +) + +type GinkgoFlag struct { + Name string + KeyPath string + SectionKey string + + Usage string + UsageArgument string + UsageDefaultValue string + + DeprecatedName string + DeprecatedDocLink string + DeprecatedVersion string + + ExportAs string + AlwaysExport bool +} + +type GinkgoFlags []GinkgoFlag + +func (f GinkgoFlags) CopyAppend(flags ...GinkgoFlag) GinkgoFlags { + out := GinkgoFlags{} + out = append(out, f...) + out = append(out, flags...) + return out +} + +func (f GinkgoFlags) WithPrefix(prefix string) GinkgoFlags { + if prefix == "" { + return f + } + out := GinkgoFlags{} + for _, flag := range f { + if flag.Name != "" { + flag.Name = prefix + "." + flag.Name + } + if flag.DeprecatedName != "" { + flag.DeprecatedName = prefix + "." + flag.DeprecatedName + } + if flag.ExportAs != "" { + flag.ExportAs = prefix + "." + flag.ExportAs + } + out = append(out, flag) + } + return out +} + +func (f GinkgoFlags) SubsetWithNames(names ...string) GinkgoFlags { + out := GinkgoFlags{} + for _, flag := range f { + for _, name := range names { + if flag.Name == name { + out = append(out, flag) + break + } + } + } + return out +} + +type GinkgoFlagSection struct { + Key string + Style string + Succinct bool + Heading string + Description string +} + +type GinkgoFlagSections []GinkgoFlagSection + +func (gfs GinkgoFlagSections) Lookup(key string) (GinkgoFlagSection, bool) { + for _, section := range gfs { + if section.Key == key { + return section, true + } + } + + return GinkgoFlagSection{}, false +} + +type GinkgoFlagSet struct { + flags GinkgoFlags + bindings any + + sections GinkgoFlagSections + extraGoFlagsSection GinkgoFlagSection + + flagSet *flag.FlagSet +} + +// Call NewGinkgoFlagSet to create GinkgoFlagSet that creates and binds to it's own *flag.FlagSet +func NewGinkgoFlagSet(flags GinkgoFlags, bindings any, sections GinkgoFlagSections) (GinkgoFlagSet, error) { + return bindFlagSet(GinkgoFlagSet{ + flags: flags, + bindings: bindings, + sections: sections, + }, nil) +} + +// Call NewGinkgoFlagSet to create GinkgoFlagSet that extends an existing *flag.FlagSet +func NewAttachedGinkgoFlagSet(flagSet *flag.FlagSet, flags GinkgoFlags, bindings any, sections GinkgoFlagSections, extraGoFlagsSection GinkgoFlagSection) (GinkgoFlagSet, error) { + return bindFlagSet(GinkgoFlagSet{ + flags: flags, + bindings: bindings, + sections: sections, + extraGoFlagsSection: extraGoFlagsSection, + }, flagSet) +} + +func bindFlagSet(f GinkgoFlagSet, flagSet *flag.FlagSet) (GinkgoFlagSet, error) { + if flagSet == nil { + f.flagSet = flag.NewFlagSet("", flag.ContinueOnError) + //suppress all output as Ginkgo is responsible for formatting usage + f.flagSet.SetOutput(io.Discard) + } else { + f.flagSet = flagSet + //we're piggybacking on an existing flagset (typically go test) so we have limited control + //on user feedback + f.flagSet.Usage = f.substituteUsage + } + + for _, flag := range f.flags { + name := flag.Name + + deprecatedUsage := "[DEPRECATED]" + deprecatedName := flag.DeprecatedName + if name != "" { + deprecatedUsage = fmt.Sprintf("[DEPRECATED] use --%s instead", name) + } else if flag.Usage != "" { + deprecatedUsage += " " + flag.Usage + } + + value, ok := valueAtKeyPath(f.bindings, flag.KeyPath) + if !ok { + return GinkgoFlagSet{}, fmt.Errorf("could not load KeyPath: %s", flag.KeyPath) + } + + iface, addr := value.Interface(), value.Addr().Interface() + + switch value.Type() { + case reflect.TypeOf(string("")): + if name != "" { + f.flagSet.StringVar(addr.(*string), name, iface.(string), flag.Usage) + } + if deprecatedName != "" { + f.flagSet.StringVar(addr.(*string), deprecatedName, iface.(string), deprecatedUsage) + } + case reflect.TypeOf(int64(0)): + if name != "" { + f.flagSet.Int64Var(addr.(*int64), name, iface.(int64), flag.Usage) + } + if deprecatedName != "" { + f.flagSet.Int64Var(addr.(*int64), deprecatedName, iface.(int64), deprecatedUsage) + } + case reflect.TypeOf(float64(0)): + if name != "" { + f.flagSet.Float64Var(addr.(*float64), name, iface.(float64), flag.Usage) + } + if deprecatedName != "" { + f.flagSet.Float64Var(addr.(*float64), deprecatedName, iface.(float64), deprecatedUsage) + } + case reflect.TypeOf(int(0)): + if name != "" { + f.flagSet.IntVar(addr.(*int), name, iface.(int), flag.Usage) + } + if deprecatedName != "" { + f.flagSet.IntVar(addr.(*int), deprecatedName, iface.(int), deprecatedUsage) + } + case reflect.TypeOf(bool(true)): + if name != "" { + f.flagSet.BoolVar(addr.(*bool), name, iface.(bool), flag.Usage) + } + if deprecatedName != "" { + f.flagSet.BoolVar(addr.(*bool), deprecatedName, iface.(bool), deprecatedUsage) + } + case reflect.TypeOf(time.Duration(0)): + if name != "" { + f.flagSet.DurationVar(addr.(*time.Duration), name, iface.(time.Duration), flag.Usage) + } + if deprecatedName != "" { + f.flagSet.DurationVar(addr.(*time.Duration), deprecatedName, iface.(time.Duration), deprecatedUsage) + } + + case reflect.TypeOf([]string{}): + if name != "" { + f.flagSet.Var(stringSliceVar{value}, name, flag.Usage) + } + if deprecatedName != "" { + f.flagSet.Var(stringSliceVar{value}, deprecatedName, deprecatedUsage) + } + default: + return GinkgoFlagSet{}, fmt.Errorf("unsupported type %T", iface) + } + } + + return f, nil +} + +func (f GinkgoFlagSet) IsZero() bool { + return f.flagSet == nil +} + +func (f GinkgoFlagSet) WasSet(name string) bool { + found := false + f.flagSet.Visit(func(f *flag.Flag) { + if f.Name == name { + found = true + } + }) + + return found +} + +func (f GinkgoFlagSet) Lookup(name string) *flag.Flag { + return f.flagSet.Lookup(name) +} + +func (f GinkgoFlagSet) Parse(args []string) ([]string, error) { + if f.IsZero() { + return args, nil + } + err := f.flagSet.Parse(args) + if err != nil { + return []string{}, err + } + return f.flagSet.Args(), nil +} + +func (f GinkgoFlagSet) ValidateDeprecations(deprecationTracker *DeprecationTracker) { + if f.IsZero() { + return + } + f.flagSet.Visit(func(flag *flag.Flag) { + for _, ginkgoFlag := range f.flags { + if ginkgoFlag.DeprecatedName != "" && strings.HasSuffix(flag.Name, ginkgoFlag.DeprecatedName) { + message := fmt.Sprintf("--%s is deprecated", ginkgoFlag.DeprecatedName) + if ginkgoFlag.Name != "" { + message = fmt.Sprintf("--%s is deprecated, use --%s instead", ginkgoFlag.DeprecatedName, ginkgoFlag.Name) + } else if ginkgoFlag.Usage != "" { + message += " " + ginkgoFlag.Usage + } + + deprecationTracker.TrackDeprecation(Deprecation{ + Message: message, + DocLink: ginkgoFlag.DeprecatedDocLink, + Version: ginkgoFlag.DeprecatedVersion, + }) + } + } + }) +} + +func (f GinkgoFlagSet) Usage() string { + if f.IsZero() { + return "" + } + groupedFlags := map[GinkgoFlagSection]GinkgoFlags{} + ungroupedFlags := GinkgoFlags{} + managedFlags := map[string]bool{} + extraGoFlags := []*flag.Flag{} + + for _, flag := range f.flags { + managedFlags[flag.Name] = true + managedFlags[flag.DeprecatedName] = true + + if flag.Name == "" { + continue + } + + section, ok := f.sections.Lookup(flag.SectionKey) + if ok { + groupedFlags[section] = append(groupedFlags[section], flag) + } else { + ungroupedFlags = append(ungroupedFlags, flag) + } + } + + f.flagSet.VisitAll(func(flag *flag.Flag) { + if !managedFlags[flag.Name] { + extraGoFlags = append(extraGoFlags, flag) + } + }) + + out := "" + for _, section := range f.sections { + flags := groupedFlags[section] + if len(flags) == 0 { + continue + } + out += f.usageForSection(section) + if section.Succinct { + succinctFlags := []string{} + for _, flag := range flags { + if flag.Name != "" { + succinctFlags = append(succinctFlags, fmt.Sprintf("--%s", flag.Name)) + } + } + out += formatter.Fiw(1, formatter.COLS, section.Style+strings.Join(succinctFlags, ", ")+"{{/}}\n") + } else { + for _, flag := range flags { + out += f.usageForFlag(flag, section.Style) + } + } + out += "\n" + } + if len(ungroupedFlags) > 0 { + for _, flag := range ungroupedFlags { + out += f.usageForFlag(flag, "") + } + out += "\n" + } + if len(extraGoFlags) > 0 { + out += f.usageForSection(f.extraGoFlagsSection) + for _, goFlag := range extraGoFlags { + out += f.usageForGoFlag(goFlag) + } + } + + return out +} + +func (f GinkgoFlagSet) substituteUsage() { + fmt.Fprintln(f.flagSet.Output(), f.Usage()) +} + +func valueAtKeyPath(root any, keyPath string) (reflect.Value, bool) { + if len(keyPath) == 0 { + return reflect.Value{}, false + } + + val := reflect.ValueOf(root) + components := strings.Split(keyPath, ".") + for _, component := range components { + val = reflect.Indirect(val) + switch val.Kind() { + case reflect.Map: + val = val.MapIndex(reflect.ValueOf(component)) + if val.Kind() == reflect.Interface { + val = reflect.ValueOf(val.Interface()) + } + case reflect.Struct: + val = val.FieldByName(component) + default: + return reflect.Value{}, false + } + if (val == reflect.Value{}) { + return reflect.Value{}, false + } + } + + return val, true +} + +func (f GinkgoFlagSet) usageForSection(section GinkgoFlagSection) string { + out := formatter.F(section.Style + "{{bold}}{{underline}}" + section.Heading + "{{/}}\n") + if section.Description != "" { + out += formatter.Fiw(0, formatter.COLS, section.Description+"\n") + } + return out +} + +func (f GinkgoFlagSet) usageForFlag(flag GinkgoFlag, style string) string { + argument := flag.UsageArgument + defValue := flag.UsageDefaultValue + if argument == "" { + value, _ := valueAtKeyPath(f.bindings, flag.KeyPath) + switch value.Type() { + case reflect.TypeOf(string("")): + argument = "string" + case reflect.TypeOf(int64(0)), reflect.TypeOf(int(0)): + argument = "int" + case reflect.TypeOf(time.Duration(0)): + argument = "duration" + case reflect.TypeOf(float64(0)): + argument = "float" + case reflect.TypeOf([]string{}): + argument = "string" + } + } + if argument != "" { + argument = "[" + argument + "] " + } + if defValue != "" { + defValue = fmt.Sprintf("(default: %s)", defValue) + } + hyphens := "--" + if len(flag.Name) == 1 { + hyphens = "-" + } + + out := formatter.Fi(1, style+"%s%s{{/}} %s{{gray}}%s{{/}}\n", hyphens, flag.Name, argument, defValue) + out += formatter.Fiw(2, formatter.COLS, "{{light-gray}}%s{{/}}\n", flag.Usage) + return out +} + +func (f GinkgoFlagSet) usageForGoFlag(goFlag *flag.Flag) string { + //Taken directly from the flag package + out := fmt.Sprintf(" -%s", goFlag.Name) + name, usage := flag.UnquoteUsage(goFlag) + if len(name) > 0 { + out += " " + name + } + if len(out) <= 4 { + out += "\t" + } else { + out += "\n \t" + } + out += strings.ReplaceAll(usage, "\n", "\n \t") + out += "\n" + return out +} + +type stringSliceVar struct { + slice reflect.Value +} + +func (ssv stringSliceVar) String() string { return "" } +func (ssv stringSliceVar) Set(s string) error { + ssv.slice.Set(reflect.AppendSlice(ssv.slice, reflect.ValueOf([]string{s}))) + return nil +} + +// given a set of GinkgoFlags and bindings, generate flag arguments suitable to be passed to an application with that set of flags configured. +func GenerateFlagArgs(flags GinkgoFlags, bindings any) ([]string, error) { + result := []string{} + for _, flag := range flags { + name := flag.ExportAs + if name == "" { + name = flag.Name + } + if name == "" { + continue + } + + value, ok := valueAtKeyPath(bindings, flag.KeyPath) + if !ok { + return []string{}, fmt.Errorf("could not load KeyPath: %s", flag.KeyPath) + } + + iface := value.Interface() + switch value.Type() { + case reflect.TypeOf(string("")): + if iface.(string) != "" || flag.AlwaysExport { + result = append(result, fmt.Sprintf("--%s=%s", name, iface)) + } + case reflect.TypeOf(int64(0)): + if iface.(int64) != 0 || flag.AlwaysExport { + result = append(result, fmt.Sprintf("--%s=%d", name, iface)) + } + case reflect.TypeOf(float64(0)): + if iface.(float64) != 0 || flag.AlwaysExport { + result = append(result, fmt.Sprintf("--%s=%f", name, iface)) + } + case reflect.TypeOf(int(0)): + if iface.(int) != 0 || flag.AlwaysExport { + result = append(result, fmt.Sprintf("--%s=%d", name, iface)) + } + case reflect.TypeOf(bool(true)): + if iface.(bool) { + result = append(result, fmt.Sprintf("--%s", name)) + } + case reflect.TypeOf(time.Duration(0)): + if iface.(time.Duration) != time.Duration(0) || flag.AlwaysExport { + result = append(result, fmt.Sprintf("--%s=%s", name, iface)) + } + + case reflect.TypeOf([]string{}): + strings := iface.([]string) + for _, s := range strings { + result = append(result, fmt.Sprintf("--%s=%s", name, s)) + } + default: + return []string{}, fmt.Errorf("unsupported type %T", iface) + } + } + + return result, nil +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/types/label_filter.go b/backend/vendor/github.com/onsi/ginkgo/v2/types/label_filter.go new file mode 100644 index 0000000..40a909b --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/types/label_filter.go @@ -0,0 +1,583 @@ +package types + +import ( + "fmt" + "regexp" + "strings" +) + +var DEBUG_LABEL_FILTER_PARSING = false + +type LabelFilter func([]string) bool + +func matchLabelAction(label string) LabelFilter { + expected := strings.ToLower(label) + return func(labels []string) bool { + for i := range labels { + if strings.ToLower(labels[i]) == expected { + return true + } + } + return false + } +} + +func matchLabelRegexAction(regex *regexp.Regexp) LabelFilter { + return func(labels []string) bool { + for i := range labels { + if regex.MatchString(labels[i]) { + return true + } + } + return false + } +} + +func notAction(filter LabelFilter) LabelFilter { + return func(labels []string) bool { return !filter(labels) } +} + +func andAction(a, b LabelFilter) LabelFilter { + return func(labels []string) bool { return a(labels) && b(labels) } +} + +func orAction(a, b LabelFilter) LabelFilter { + return func(labels []string) bool { return a(labels) || b(labels) } +} + +func labelSetFor(key string, labels []string) map[string]bool { + key = strings.ToLower(strings.TrimSpace(key)) + out := map[string]bool{} + for _, label := range labels { + components := strings.SplitN(label, ":", 2) + if len(components) < 2 { + continue + } + if key == strings.ToLower(strings.TrimSpace(components[0])) { + out[strings.ToLower(strings.TrimSpace(components[1]))] = true + } + } + + return out +} + +func isEmptyLabelSetAction(key string) LabelFilter { + return func(labels []string) bool { + return len(labelSetFor(key, labels)) == 0 + } +} + +func containsAnyLabelSetAction(key string, expectedValues []string) LabelFilter { + return func(labels []string) bool { + set := labelSetFor(key, labels) + for _, value := range expectedValues { + if set[value] { + return true + } + } + return false + } +} + +func containsAllLabelSetAction(key string, expectedValues []string) LabelFilter { + return func(labels []string) bool { + set := labelSetFor(key, labels) + for _, value := range expectedValues { + if !set[value] { + return false + } + } + return true + } +} + +func consistsOfLabelSetAction(key string, expectedValues []string) LabelFilter { + return func(labels []string) bool { + set := labelSetFor(key, labels) + if len(set) != len(expectedValues) { + return false + } + for _, value := range expectedValues { + if !set[value] { + return false + } + } + return true + } +} + +func isSubsetOfLabelSetAction(key string, expectedValues []string) LabelFilter { + expectedSet := map[string]bool{} + for _, value := range expectedValues { + expectedSet[value] = true + } + return func(labels []string) bool { + set := labelSetFor(key, labels) + for value := range set { + if !expectedSet[value] { + return false + } + } + return true + } +} + +type lfToken uint + +const ( + lfTokenInvalid lfToken = iota + + lfTokenRoot + lfTokenOpenGroup + lfTokenCloseGroup + lfTokenNot + lfTokenAnd + lfTokenOr + lfTokenRegexp + lfTokenLabel + lfTokenSetKey + lfTokenSetOperation + lfTokenSetArgument + lfTokenEOF +) + +func (l lfToken) Precedence() int { + switch l { + case lfTokenRoot, lfTokenOpenGroup: + return 0 + case lfTokenOr: + return 1 + case lfTokenAnd: + return 2 + case lfTokenNot: + return 3 + case lfTokenSetOperation: + return 4 + } + return -1 +} + +func (l lfToken) String() string { + switch l { + case lfTokenRoot: + return "ROOT" + case lfTokenOpenGroup: + return "(" + case lfTokenCloseGroup: + return ")" + case lfTokenNot: + return "!" + case lfTokenAnd: + return "&&" + case lfTokenOr: + return "||" + case lfTokenRegexp: + return "/regexp/" + case lfTokenLabel: + return "label" + case lfTokenSetKey: + return "set_key" + case lfTokenSetOperation: + return "set_operation" + case lfTokenSetArgument: + return "set_argument" + case lfTokenEOF: + return "EOF" + } + return "INVALID" +} + +type treeNode struct { + token lfToken + location int + value string + + parent *treeNode + leftNode *treeNode + rightNode *treeNode +} + +func (tn *treeNode) setRightNode(node *treeNode) { + tn.rightNode = node + node.parent = tn +} + +func (tn *treeNode) setLeftNode(node *treeNode) { + tn.leftNode = node + node.parent = tn +} + +func (tn *treeNode) firstAncestorWithPrecedenceLEQ(precedence int) *treeNode { + if tn.token.Precedence() <= precedence { + return tn + } + return tn.parent.firstAncestorWithPrecedenceLEQ(precedence) +} + +func (tn *treeNode) firstUnmatchedOpenNode() *treeNode { + if tn.token == lfTokenOpenGroup { + return tn + } + if tn.parent == nil { + return nil + } + return tn.parent.firstUnmatchedOpenNode() +} + +func (tn *treeNode) constructLabelFilter(input string) (LabelFilter, error) { + switch tn.token { + case lfTokenOpenGroup: + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, tn.location, "Mismatched '(' - could not find matching ')'.") + case lfTokenLabel: + return matchLabelAction(tn.value), nil + case lfTokenRegexp: + re, err := regexp.Compile(tn.value) + if err != nil { + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, tn.location, fmt.Sprintf("RegExp compilation error: %s", err)) + } + return matchLabelRegexAction(re), nil + case lfTokenSetOperation: + tokenSetOperation := strings.ToLower(tn.value) + if tokenSetOperation == "isempty" { + return isEmptyLabelSetAction(tn.leftNode.value), nil + } + if tn.rightNode == nil { + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, tn.location, fmt.Sprintf("Set operation '%s' is missing an argument.", tn.value)) + } + + rawValues := strings.Split(tn.rightNode.value, ",") + values := make([]string, len(rawValues)) + for i := range rawValues { + values[i] = strings.ToLower(strings.TrimSpace(rawValues[i])) + if strings.ContainsAny(values[i], "&|!,()/") { + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, tn.rightNode.location, fmt.Sprintf("Invalid label value '%s' in set operation argument.", values[i])) + } else if values[i] == "" { + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, tn.rightNode.location, "Empty label value in set operation argument.") + } + } + switch tokenSetOperation { + case "containsany": + return containsAnyLabelSetAction(tn.leftNode.value, values), nil + case "containsall": + return containsAllLabelSetAction(tn.leftNode.value, values), nil + case "consistsof": + return consistsOfLabelSetAction(tn.leftNode.value, values), nil + case "issubsetof": + return isSubsetOfLabelSetAction(tn.leftNode.value, values), nil + } + } + + if tn.rightNode == nil { + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, -1, "Unexpected EOF.") + } + rightLF, err := tn.rightNode.constructLabelFilter(input) + if err != nil { + return nil, err + } + + switch tn.token { + case lfTokenRoot, lfTokenCloseGroup: + return rightLF, nil + case lfTokenNot: + return notAction(rightLF), nil + } + + if tn.leftNode == nil { + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, tn.location, fmt.Sprintf("Malformed tree - '%s' is missing left operand.", tn.token)) + } + leftLF, err := tn.leftNode.constructLabelFilter(input) + if err != nil { + return nil, err + } + + switch tn.token { + case lfTokenAnd: + return andAction(leftLF, rightLF), nil + case lfTokenOr: + return orAction(leftLF, rightLF), nil + } + + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, tn.location, fmt.Sprintf("Invalid token '%s'.", tn.token)) +} + +func (tn *treeNode) tokenString() string { + out := fmt.Sprintf("<%s", tn.token) + if tn.value != "" { + out += " | " + tn.value + } + out += ">" + return out +} + +func (tn *treeNode) toString(indent int) string { + out := tn.tokenString() + "\n" + if tn.leftNode != nil { + out += fmt.Sprintf("%s |_(L)_%s", strings.Repeat(" ", indent), tn.leftNode.toString(indent+1)) + } + if tn.rightNode != nil { + out += fmt.Sprintf("%s |_(R)_%s", strings.Repeat(" ", indent), tn.rightNode.toString(indent+1)) + } + return out +} + +var validSetOperations = map[string]string{ + "containsany": "containsAny", + "containsall": "containsAll", + "consistsof": "consistsOf", + "issubsetof": "isSubsetOf", + "isempty": "isEmpty", +} + +func tokenize(input string) func() (*treeNode, error) { + lastToken := lfTokenInvalid + lastValue := "" + runes, i := []rune(input), 0 + + peekIs := func(r rune) bool { + if i+1 < len(runes) { + return runes[i+1] == r + } + return false + } + + consumeUntil := func(cutset string) (string, int) { + j := i + for ; j < len(runes); j++ { + if strings.ContainsRune(cutset, runes[j]) { + break + } + } + return string(runes[i:j]), j - i + } + + return func() (*treeNode, error) { + for i < len(runes) && runes[i] == ' ' { + i += 1 + } + + if i >= len(runes) { + return &treeNode{token: lfTokenEOF}, nil + } + + node := &treeNode{location: i} + defer func() { + lastToken = node.token + lastValue = node.value + }() + + if lastToken == lfTokenSetKey { + //we should get a valid set operation next + value, n := consumeUntil(" )") + if validSetOperations[strings.ToLower(value)] == "" { + return &treeNode{}, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, i, fmt.Sprintf("Invalid set operation '%s'.", value)) + } + i += n + node.token, node.value = lfTokenSetOperation, value + return node, nil + } + if lastToken == lfTokenSetOperation { + //we should get an argument next, if we aren't isempty + var arg = "" + origI := i + if runes[i] == '{' { + i += 1 + value, n := consumeUntil("}") + if i+n >= len(runes) { + return &treeNode{}, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, i-1, "Missing closing '}' in set operation argument?") + } + i += n + 1 + arg = value + } else { + value, n := consumeUntil("&|!,()/") + i += n + arg = strings.TrimSpace(value) + } + if strings.ToLower(lastValue) == "isempty" && arg != "" { + return &treeNode{}, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, origI, fmt.Sprintf("isEmpty does not take arguments, was passed '%s'.", arg)) + } + if arg == "" && strings.ToLower(lastValue) != "isempty" { + if i < len(runes) && runes[i] == '/' { + return &treeNode{}, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, origI, "Set operations do not support regular expressions.") + } else { + return &treeNode{}, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, origI, fmt.Sprintf("Set operation '%s' requires an argument.", lastValue)) + } + } + // note that we sent an empty SetArgument token if we are isempty + node.token, node.value = lfTokenSetArgument, arg + return node, nil + } + + switch runes[i] { + case '&': + if !peekIs('&') { + return &treeNode{}, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, i, "Invalid token '&'. Did you mean '&&'?") + } + i += 2 + node.token = lfTokenAnd + case '|': + if !peekIs('|') { + return &treeNode{}, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, i, "Invalid token '|'. Did you mean '||'?") + } + i += 2 + node.token = lfTokenOr + case '!': + i += 1 + node.token = lfTokenNot + case ',': + i += 1 + node.token = lfTokenOr + case '(': + i += 1 + node.token = lfTokenOpenGroup + case ')': + i += 1 + node.token = lfTokenCloseGroup + case '/': + i += 1 + value, n := consumeUntil("/") + i += n + 1 + node.token, node.value = lfTokenRegexp, value + default: + value, n := consumeUntil("&|!,()/:") + i += n + value = strings.TrimSpace(value) + + //are we the beginning of a set operation? + if i < len(runes) && runes[i] == ':' { + if peekIs(' ') { + if value == "" { + return &treeNode{}, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, i, "Missing set key.") + } + i += 1 + //we are the beginning of a set operation + node.token, node.value = lfTokenSetKey, value + return node, nil + } + additionalValue, n := consumeUntil("&|!,()/") + additionalValue = strings.TrimSpace(additionalValue) + if additionalValue == ":" { + return &treeNode{}, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, i, "Missing set operation.") + } + i += n + value += additionalValue + } + + valueToCheckForSetOperation := strings.ToLower(value) + for setOperation := range validSetOperations { + idx := strings.Index(valueToCheckForSetOperation, " "+setOperation) + if idx > 0 { + return &treeNode{}, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, i-n+idx+1, fmt.Sprintf("Looks like you are using the set operator '%s' but did not provide a set key. Did you forget the ':'?", validSetOperations[setOperation])) + } + } + + node.token, node.value = lfTokenLabel, strings.TrimSpace(value) + } + return node, nil + } +} + +func MustParseLabelFilter(input string) LabelFilter { + filter, err := ParseLabelFilter(input) + if err != nil { + panic(err) + } + return filter +} + +func ParseLabelFilter(input string) (LabelFilter, error) { + if DEBUG_LABEL_FILTER_PARSING { + fmt.Println("\n==============") + fmt.Println("Input: ", input) + fmt.Print("Tokens: ") + } + if input == "" { + return func(_ []string) bool { return true }, nil + } + nextToken := tokenize(input) + + root := &treeNode{token: lfTokenRoot} + current := root +LOOP: + for { + node, err := nextToken() + if err != nil { + return nil, err + } + + if DEBUG_LABEL_FILTER_PARSING { + fmt.Print(node.tokenString() + " ") + } + + switch node.token { + case lfTokenEOF: + break LOOP + case lfTokenLabel, lfTokenRegexp, lfTokenSetKey: + if current.rightNode != nil { + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, node.location, "Found two adjacent labels. You need an operator between them.") + } + current.setRightNode(node) + case lfTokenNot, lfTokenOpenGroup: + if current.rightNode != nil { + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, node.location, fmt.Sprintf("Invalid token '%s'.", node.token)) + } + current.setRightNode(node) + current = node + case lfTokenAnd, lfTokenOr: + if current.rightNode == nil { + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, node.location, fmt.Sprintf("Operator '%s' missing left hand operand.", node.token)) + } + nodeToStealFrom := current.firstAncestorWithPrecedenceLEQ(node.token.Precedence()) + node.setLeftNode(nodeToStealFrom.rightNode) + nodeToStealFrom.setRightNode(node) + current = node + case lfTokenSetOperation: + if current.rightNode == nil { + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, node.location, fmt.Sprintf("Set operation '%s' missing left hand operand.", node.value)) + } + node.setLeftNode(current.rightNode) + current.setRightNode(node) + current = node + case lfTokenSetArgument: + if current.rightNode != nil { + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, node.location, fmt.Sprintf("Unexpected set argument '%s'.", node.token)) + } + current.setRightNode(node) + case lfTokenCloseGroup: + firstUnmatchedOpenNode := current.firstUnmatchedOpenNode() + if firstUnmatchedOpenNode == nil { + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, node.location, "Mismatched ')' - could not find matching '('.") + } + if firstUnmatchedOpenNode == current && current.rightNode == nil { + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, node.location, "Found empty '()' group.") + } + firstUnmatchedOpenNode.token = lfTokenCloseGroup //signify the group is now closed + current = firstUnmatchedOpenNode.parent + default: + return nil, GinkgoErrors.SyntaxErrorParsingLabelFilter(input, node.location, fmt.Sprintf("Unknown token '%s'.", node.token)) + } + } + if DEBUG_LABEL_FILTER_PARSING { + fmt.Printf("\n Tree:\n%s", root.toString(0)) + } + return root.constructLabelFilter(input) +} + +func ValidateAndCleanupLabel(label string, cl CodeLocation) (string, error) { + out := strings.TrimSpace(label) + if out == "" { + return "", GinkgoErrors.InvalidEmptyLabel(cl) + } + if strings.ContainsAny(out, "&|!,()/") { + return "", GinkgoErrors.InvalidLabel(label, cl) + } + if out[0] == ':' { + return "", GinkgoErrors.InvalidLabel(label, cl) + } + if strings.Contains(out, ":") { + components := strings.SplitN(out, ":", 2) + if len(components) < 2 || components[1] == "" { + return "", GinkgoErrors.InvalidLabel(label, cl) + } + } + return out, nil +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/types/report_entry.go b/backend/vendor/github.com/onsi/ginkgo/v2/types/report_entry.go new file mode 100644 index 0000000..63f7a9f --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/types/report_entry.go @@ -0,0 +1,190 @@ +package types + +import ( + "encoding/json" + "fmt" + "time" +) + +// ReportEntryValue wraps a report entry's value ensuring it can be encoded and decoded safely into reports +// and across the network connection when running in parallel +type ReportEntryValue struct { + raw any //unexported to prevent gob from freaking out about unregistered structs + AsJSON string + Representation string +} + +func WrapEntryValue(value any) ReportEntryValue { + return ReportEntryValue{ + raw: value, + } +} + +func (rev ReportEntryValue) GetRawValue() any { + return rev.raw +} + +func (rev ReportEntryValue) String() string { + if rev.raw == nil { + return "" + } + if colorableStringer, ok := rev.raw.(ColorableStringer); ok { + return colorableStringer.ColorableString() + } + + if stringer, ok := rev.raw.(fmt.Stringer); ok { + return stringer.String() + } + if rev.Representation != "" { + return rev.Representation + } + return fmt.Sprintf("%+v", rev.raw) +} + +func (rev ReportEntryValue) MarshalJSON() ([]byte, error) { + //All this to capture the representation at encoding-time, not creating time + //This way users can Report on pointers and get their final values at reporting-time + out := struct { + AsJSON string + Representation string + }{ + Representation: rev.String(), + } + asJSON, err := json.Marshal(rev.raw) + if err != nil { + return nil, err + } + out.AsJSON = string(asJSON) + + return json.Marshal(out) +} + +func (rev *ReportEntryValue) UnmarshalJSON(data []byte) error { + in := struct { + AsJSON string + Representation string + }{} + err := json.Unmarshal(data, &in) + if err != nil { + return err + } + rev.AsJSON = in.AsJSON + rev.Representation = in.Representation + return json.Unmarshal([]byte(in.AsJSON), &(rev.raw)) +} + +func (rev ReportEntryValue) GobEncode() ([]byte, error) { + return rev.MarshalJSON() +} + +func (rev *ReportEntryValue) GobDecode(data []byte) error { + return rev.UnmarshalJSON(data) +} + +// ReportEntry captures information attached to `SpecReport` via `AddReportEntry` +type ReportEntry struct { + // Visibility captures the visibility policy for this ReportEntry + Visibility ReportEntryVisibility + // Location captures the location of the AddReportEntry call + Location CodeLocation + + Time time.Time //need this for backwards compatibility + TimelineLocation TimelineLocation + + // Name captures the name of this report + Name string + // Value captures the (optional) object passed into AddReportEntry - this can be + // anything the user wants. The value passed to AddReportEntry is wrapped in a ReportEntryValue to make + // encoding/decoding the value easier. To access the raw value call entry.GetRawValue() + Value ReportEntryValue +} + +// ColorableStringer is an interface that ReportEntry values can satisfy. If they do then ColorableString() is used to generate their representation. +type ColorableStringer interface { + ColorableString() string +} + +// StringRepresentation() returns the string representation of the value associated with the ReportEntry -- +// if value is nil, empty string is returned +// if value is a `ColorableStringer` then `Value.ColorableString()` is returned +// if value is a `fmt.Stringer` then `Value.String()` is returned +// otherwise the value is formatted with "%+v" +func (entry ReportEntry) StringRepresentation() string { + return entry.Value.String() +} + +// GetRawValue returns the Value object that was passed to AddReportEntry +// If called in-process this will be the same object that was passed into AddReportEntry. +// If used from a rehydrated JSON file _or_ in a ReportAfterSuite when running in parallel this will be +// a JSON-decoded {}interface. If you want to reconstitute your original object you can decode the entry.Value.AsJSON +// field yourself. +func (entry ReportEntry) GetRawValue() any { + return entry.Value.GetRawValue() +} + +func (entry ReportEntry) GetTimelineLocation() TimelineLocation { + return entry.TimelineLocation +} + +type ReportEntries []ReportEntry + +func (re ReportEntries) HasVisibility(visibilities ...ReportEntryVisibility) bool { + for _, entry := range re { + if entry.Visibility.Is(visibilities...) { + return true + } + } + return false +} + +func (re ReportEntries) WithVisibility(visibilities ...ReportEntryVisibility) ReportEntries { + out := ReportEntries{} + + for _, entry := range re { + if entry.Visibility.Is(visibilities...) { + out = append(out, entry) + } + } + + return out +} + +// ReportEntryVisibility governs the visibility of ReportEntries in Ginkgo's console reporter +type ReportEntryVisibility uint + +const ( + // Always print out this ReportEntry + ReportEntryVisibilityAlways ReportEntryVisibility = iota + // Only print out this ReportEntry if the spec fails or if the test is run with -v + ReportEntryVisibilityFailureOrVerbose + // Never print out this ReportEntry (note that ReportEntrys are always encoded in machine readable reports (e.g. JSON, JUnit, etc.)) + ReportEntryVisibilityNever +) + +var revEnumSupport = NewEnumSupport(map[uint]string{ + uint(ReportEntryVisibilityAlways): "always", + uint(ReportEntryVisibilityFailureOrVerbose): "failure-or-verbose", + uint(ReportEntryVisibilityNever): "never", +}) + +func (rev ReportEntryVisibility) String() string { + return revEnumSupport.String(uint(rev)) +} +func (rev *ReportEntryVisibility) UnmarshalJSON(b []byte) error { + out, err := revEnumSupport.UnmarshJSON(b) + *rev = ReportEntryVisibility(out) + return err +} +func (rev ReportEntryVisibility) MarshalJSON() ([]byte, error) { + return revEnumSupport.MarshJSON(uint(rev)) +} + +func (v ReportEntryVisibility) Is(visibilities ...ReportEntryVisibility) bool { + for _, visibility := range visibilities { + if v == visibility { + return true + } + } + + return false +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/types/semver_filter.go b/backend/vendor/github.com/onsi/ginkgo/v2/types/semver_filter.go new file mode 100644 index 0000000..3fc2ed1 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/types/semver_filter.go @@ -0,0 +1,60 @@ +package types + +import ( + "fmt" + + "github.com/Masterminds/semver/v3" +) + +type SemVerFilter func([]string) bool + +func MustParseSemVerFilter(input string) SemVerFilter { + filter, err := ParseSemVerFilter(input) + if err != nil { + panic(err) + } + return filter +} + +func ParseSemVerFilter(filterVersion string) (SemVerFilter, error) { + if filterVersion == "" { + return func(_ []string) bool { return true }, nil + } + + targetVersion, err := semver.NewVersion(filterVersion) + if err != nil { + return nil, fmt.Errorf("invalid filter version: %w", err) + } + + return func(constraints []string) bool { + // unconstrained specs always run + if len(constraints) == 0 { + return true + } + + for _, constraintStr := range constraints { + constraint, err := semver.NewConstraint(constraintStr) + if err != nil { + return false + } + + if !constraint.Check(targetVersion) { + return false + } + } + + return true + }, nil +} + +func ValidateAndCleanupSemVerConstraint(semVerConstraint string, cl CodeLocation) (string, error) { + if len(semVerConstraint) == 0 { + return "", GinkgoErrors.InvalidEmptySemVerConstraint(cl) + } + _, err := semver.NewConstraint(semVerConstraint) + if err != nil { + return "", GinkgoErrors.InvalidSemVerConstraint(semVerConstraint, err.Error(), cl) + } + + return semVerConstraint, nil +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/types/types.go b/backend/vendor/github.com/onsi/ginkgo/v2/types/types.go new file mode 100644 index 0000000..9981a0d --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/types/types.go @@ -0,0 +1,1023 @@ +package types + +import ( + "encoding/json" + "fmt" + "os" + "slices" + "sort" + "strings" + "time" +) + +const GINKGO_FOCUS_EXIT_CODE = 197 + +var GINKGO_TIME_FORMAT = "01/02/06 15:04:05.999" + +func init() { + if os.Getenv("GINKGO_TIME_FORMAT") != "" { + GINKGO_TIME_FORMAT = os.Getenv("GINKGO_TIME_FORMAT") + } +} + +// ConstructionNodeReport captures information about a Ginkgo spec. +type ConstructionNodeReport struct { + // ContainerHierarchyTexts is a slice containing the text strings of + // all Describe/Context/When containers in this spec's hierarchy. + ContainerHierarchyTexts []string + + // ContainerHierarchyLocations is a slice containing the CodeLocations of + // all Describe/Context/When containers in this spec's hierarchy. + ContainerHierarchyLocations []CodeLocation + + // ContainerHierarchyLabels is a slice containing the labels of + // all Describe/Context/When containers in this spec's hierarchy + ContainerHierarchyLabels [][]string + + // ContainerHierarchySemVerConstraints is a slice containing the semVerConstraints of + // all Describe/Context/When containers in this spec's hierarchy + ContainerHierarchySemVerConstraints [][]string + + // IsSerial captures whether the any container has the Serial decorator + IsSerial bool + + // IsInOrderedContainer captures whether any container is an Ordered container + IsInOrderedContainer bool +} + +// FullText returns a concatenation of all the report.ContainerHierarchyTexts and report.LeafNodeText +func (report ConstructionNodeReport) FullText() string { + texts := []string{} + texts = append(texts, report.ContainerHierarchyTexts...) + texts = slices.DeleteFunc(texts, func(t string) bool { + return t == "" + }) + return strings.Join(texts, " ") +} + +// Labels returns a deduped set of all the spec's Labels. +func (report ConstructionNodeReport) Labels() []string { + out := []string{} + seen := map[string]bool{} + for _, labels := range report.ContainerHierarchyLabels { + for _, label := range labels { + if !seen[label] { + seen[label] = true + out = append(out, label) + } + } + } + + return out +} + +// Report captures information about a Ginkgo test run +type Report struct { + //SuitePath captures the absolute path to the test suite + SuitePath string + + //SuiteDescription captures the description string passed to the DSL's RunSpecs() function + SuiteDescription string + + //SuiteLabels captures any labels attached to the suite by the DSL's RunSpecs() function + SuiteLabels []string + + //SuiteSemVerConstraints captures any semVerConstraints attached to the suite by the DSL's RunSpecs() function + SuiteSemVerConstraints []string + + //SuiteSucceeded captures the success or failure status of the test run + //If true, the test run is considered successful. + //If false, the test run is considered unsuccessful + SuiteSucceeded bool + + //SuiteHasProgrammaticFocus captures whether the test suite has a test or set of tests that are programmatically focused + //(i.e an `FIt` or an `FDescribe` + SuiteHasProgrammaticFocus bool + + //SpecialSuiteFailureReasons may contain special failure reasons + //For example, a test suite might be considered "failed" even if none of the individual specs + //have a failure state. For example, if the user has configured --fail-on-pending the test suite + //will have failed if there are pending tests even though all non-pending tests may have passed. In such + //cases, Ginkgo populates SpecialSuiteFailureReasons with a clear message indicating the reason for the failure. + //SpecialSuiteFailureReasons is also populated if the test suite is interrupted by the user. + //Since multiple special failure reasons can occur, this field is a slice. + SpecialSuiteFailureReasons []string + + //PreRunStats contains a set of stats captured before the test run begins. This is primarily used + //by Ginkgo's reporter to tell the user how many specs are in the current suite (PreRunStats.TotalSpecs) + //and how many it intends to run (PreRunStats.SpecsThatWillRun) after applying any relevant focus or skip filters. + PreRunStats PreRunStats + + //StartTime and EndTime capture the start and end time of the test run + StartTime time.Time + EndTime time.Time + + //RunTime captures the duration of the test run + RunTime time.Duration + + //SuiteConfig captures the Ginkgo configuration governing this test run + //SuiteConfig includes information necessary for reproducing an identical test run, + //such as the random seed and any filters applied during the test run + SuiteConfig SuiteConfig + + //SpecReports is a list of all SpecReports generated by this test run + //It is empty when the SuiteReport is provided to ReportBeforeSuite + SpecReports SpecReports +} + +// PreRunStats contains a set of stats captured before the test run begins. This is primarily used +// by Ginkgo's reporter to tell the user how many specs are in the current suite (PreRunStats.TotalSpecs) +// and how many it intends to run (PreRunStats.SpecsThatWillRun) after applying any relevant focus or skip filters. +type PreRunStats struct { + TotalSpecs int + SpecsThatWillRun int +} + +// Add is used by Ginkgo's parallel aggregation mechanisms to combine test run reports form individual parallel processes +// to form a complete final report. +func (report Report) Add(other Report) Report { + report.SuiteSucceeded = report.SuiteSucceeded && other.SuiteSucceeded + + if other.StartTime.Before(report.StartTime) { + report.StartTime = other.StartTime + } + + if other.EndTime.After(report.EndTime) { + report.EndTime = other.EndTime + } + + specialSuiteFailureReasons := []string{} + reasonsLookup := map[string]bool{} + for _, reasons := range [][]string{report.SpecialSuiteFailureReasons, other.SpecialSuiteFailureReasons} { + for _, reason := range reasons { + if !reasonsLookup[reason] { + reasonsLookup[reason] = true + specialSuiteFailureReasons = append(specialSuiteFailureReasons, reason) + } + } + } + report.SpecialSuiteFailureReasons = specialSuiteFailureReasons + report.RunTime = report.EndTime.Sub(report.StartTime) + + reports := make(SpecReports, len(report.SpecReports)+len(other.SpecReports)) + copy(reports, report.SpecReports) + offset := len(report.SpecReports) + for i := range other.SpecReports { + reports[i+offset] = other.SpecReports[i] + } + + report.SpecReports = reports + return report +} + +// SpecReport captures information about a Ginkgo spec. +type SpecReport struct { + // ContainerHierarchyTexts is a slice containing the text strings of + // all Describe/Context/When containers in this spec's hierarchy. + ContainerHierarchyTexts []string + + // ContainerHierarchyLocations is a slice containing the CodeLocations of + // all Describe/Context/When containers in this spec's hierarchy. + ContainerHierarchyLocations []CodeLocation + + // ContainerHierarchyLabels is a slice containing the labels of + // all Describe/Context/When containers in this spec's hierarchy + ContainerHierarchyLabels [][]string + + // ContainerHierarchySemVerConstraints is a slice containing the semVerConstraints of + // all Describe/Context/When containers in this spec's hierarchy + ContainerHierarchySemVerConstraints [][]string + + // LeafNodeType, LeafNodeLocation, LeafNodeLabels, LeafNodeSemVerConstraints and LeafNodeText capture the NodeType, CodeLocation, and text + // of the Ginkgo node being tested (typically an NodeTypeIt node, though this can also be + // one of the NodeTypesForSuiteLevelNodes node types) + LeafNodeType NodeType + LeafNodeLocation CodeLocation + LeafNodeLabels []string + LeafNodeSemVerConstraints []string + LeafNodeText string + + // Captures the Spec Priority + SpecPriority int + + // State captures whether the spec has passed, failed, etc. + State SpecState + + // IsSerial captures whether the spec has the Serial decorator + IsSerial bool + + // IsInOrderedContainer captures whether the spec appears in an Ordered container + IsInOrderedContainer bool + + // StartTime and EndTime capture the start and end time of the spec + StartTime time.Time + EndTime time.Time + + // RunTime captures the duration of the spec + RunTime time.Duration + + // ParallelProcess captures the parallel process that this spec ran on + ParallelProcess int + + // RunningInParallel captures whether this spec is part of a suite that ran in parallel + RunningInParallel bool + + //Failure is populated if a spec has failed, panicked, been interrupted, or skipped by the user (e.g. calling Skip()) + //It includes detailed information about the Failure + Failure Failure + + // NumAttempts captures the number of times this Spec was run. + // Flakey specs can be retried with ginkgo --flake-attempts=N or the use of the FlakeAttempts decorator. + // Repeated specs can be retried with the use of the MustPassRepeatedly decorator + NumAttempts int + + // MaxFlakeAttempts captures whether the spec has been retried with ginkgo --flake-attempts=N or the use of the FlakeAttempts decorator. + MaxFlakeAttempts int + + // MaxMustPassRepeatedly captures whether the spec has the MustPassRepeatedly decorator + MaxMustPassRepeatedly int + + // CapturedGinkgoWriterOutput contains text printed to the GinkgoWriter + CapturedGinkgoWriterOutput string + + // CapturedStdOutErr contains text printed to stdout/stderr (when running in parallel) + // This is always empty when running in series or calling CurrentSpecReport() + // It is used internally by Ginkgo's reporter + CapturedStdOutErr string + + // ReportEntries contains any reports added via `AddReportEntry` + ReportEntries ReportEntries + + // ProgressReports contains any progress reports generated during this spec. These can either be manually triggered, or automatically generated by Ginkgo via the PollProgressAfter() decorator + ProgressReports []ProgressReport + + // AdditionalFailures contains any failures that occurred after the initial spec failure. These typically occur in cleanup nodes after the initial failure and are only emitted when running in verbose mode. + AdditionalFailures []AdditionalFailure + + // SpecEvents capture additional events that occur during the spec run + SpecEvents SpecEvents +} + +func (report SpecReport) MarshalJSON() ([]byte, error) { + //All this to avoid emitting an empty Failure struct in the JSON + out := struct { + ContainerHierarchyTexts []string + ContainerHierarchyLocations []CodeLocation + ContainerHierarchyLabels [][]string + ContainerHierarchySemVerConstraints [][]string + LeafNodeType NodeType + LeafNodeLocation CodeLocation + LeafNodeLabels []string + LeafNodeSemVerConstraints []string + LeafNodeText string + State SpecState + StartTime time.Time + EndTime time.Time + RunTime time.Duration + ParallelProcess int + Failure *Failure `json:",omitempty"` + NumAttempts int + MaxFlakeAttempts int + MaxMustPassRepeatedly int + CapturedGinkgoWriterOutput string `json:",omitempty"` + CapturedStdOutErr string `json:",omitempty"` + ReportEntries ReportEntries `json:",omitempty"` + ProgressReports []ProgressReport `json:",omitempty"` + AdditionalFailures []AdditionalFailure `json:",omitempty"` + SpecEvents SpecEvents `json:",omitempty"` + }{ + ContainerHierarchyTexts: report.ContainerHierarchyTexts, + ContainerHierarchyLocations: report.ContainerHierarchyLocations, + ContainerHierarchyLabels: report.ContainerHierarchyLabels, + ContainerHierarchySemVerConstraints: report.ContainerHierarchySemVerConstraints, + LeafNodeType: report.LeafNodeType, + LeafNodeLocation: report.LeafNodeLocation, + LeafNodeLabels: report.LeafNodeLabels, + LeafNodeSemVerConstraints: report.LeafNodeSemVerConstraints, + LeafNodeText: report.LeafNodeText, + State: report.State, + StartTime: report.StartTime, + EndTime: report.EndTime, + RunTime: report.RunTime, + ParallelProcess: report.ParallelProcess, + Failure: nil, + ReportEntries: nil, + NumAttempts: report.NumAttempts, + MaxFlakeAttempts: report.MaxFlakeAttempts, + MaxMustPassRepeatedly: report.MaxMustPassRepeatedly, + CapturedGinkgoWriterOutput: report.CapturedGinkgoWriterOutput, + CapturedStdOutErr: report.CapturedStdOutErr, + } + + if !report.Failure.IsZero() { + out.Failure = &(report.Failure) + } + if len(report.ReportEntries) > 0 { + out.ReportEntries = report.ReportEntries + } + if len(report.ProgressReports) > 0 { + out.ProgressReports = report.ProgressReports + } + if len(report.AdditionalFailures) > 0 { + out.AdditionalFailures = report.AdditionalFailures + } + if len(report.SpecEvents) > 0 { + out.SpecEvents = report.SpecEvents + } + + return json.Marshal(out) +} + +// CombinedOutput returns a single string representation of both CapturedStdOutErr and CapturedGinkgoWriterOutput +// Note that both are empty when using CurrentSpecReport() so CurrentSpecReport().CombinedOutput() will always be empty. +// CombinedOutput() is used internally by Ginkgo's reporter. +func (report SpecReport) CombinedOutput() string { + if report.CapturedStdOutErr == "" { + return report.CapturedGinkgoWriterOutput + } + if report.CapturedGinkgoWriterOutput == "" { + return report.CapturedStdOutErr + } + return report.CapturedStdOutErr + "\n" + report.CapturedGinkgoWriterOutput +} + +// Failed returns true if report.State is one of the SpecStateFailureStates +// (SpecStateFailed, SpecStatePanicked, SpecStateinterrupted, SpecStateAborted) +func (report SpecReport) Failed() bool { + return report.State.Is(SpecStateFailureStates) +} + +// FullText returns a concatenation of all the report.ContainerHierarchyTexts and report.LeafNodeText +func (report SpecReport) FullText() string { + texts := []string{} + texts = append(texts, report.ContainerHierarchyTexts...) + if report.LeafNodeText != "" { + texts = append(texts, report.LeafNodeText) + } + texts = slices.DeleteFunc(texts, func(t string) bool { + return t == "" + }) + return strings.Join(texts, " ") +} + +// Labels returns a deduped set of all the spec's Labels. +func (report SpecReport) Labels() []string { + out := []string{} + seen := map[string]bool{} + for _, labels := range report.ContainerHierarchyLabels { + for _, label := range labels { + if !seen[label] { + seen[label] = true + out = append(out, label) + } + } + } + for _, label := range report.LeafNodeLabels { + if !seen[label] { + seen[label] = true + out = append(out, label) + } + } + + return out +} + +// SemVerConstraints returns a deduped set of all the spec's SemVerConstraints. +func (report SpecReport) SemVerConstraints() []string { + out := []string{} + seen := map[string]bool{} + for _, semVerConstraints := range report.ContainerHierarchySemVerConstraints { + for _, semVerConstraint := range semVerConstraints { + if !seen[semVerConstraint] { + seen[semVerConstraint] = true + out = append(out, semVerConstraint) + } + } + } + for _, semVerConstraint := range report.LeafNodeSemVerConstraints { + if !seen[semVerConstraint] { + seen[semVerConstraint] = true + out = append(out, semVerConstraint) + } + } + + return out +} + +// MatchesLabelFilter returns true if the spec satisfies the passed in label filter query +func (report SpecReport) MatchesLabelFilter(query string) (bool, error) { + filter, err := ParseLabelFilter(query) + if err != nil { + return false, err + } + return filter(report.Labels()), nil +} + +// MatchesSemVerFilter returns true if the spec satisfies the passed in label filter query +func (report SpecReport) MatchesSemVerFilter(version string) (bool, error) { + filter, err := ParseSemVerFilter(version) + if err != nil { + return false, err + } + return filter(report.SemVerConstraints()), nil +} + +// FileName() returns the name of the file containing the spec +func (report SpecReport) FileName() string { + return report.LeafNodeLocation.FileName +} + +// LineNumber() returns the line number of the leaf node +func (report SpecReport) LineNumber() int { + return report.LeafNodeLocation.LineNumber +} + +// FailureMessage() returns the failure message (or empty string if the test hasn't failed) +func (report SpecReport) FailureMessage() string { + return report.Failure.Message +} + +// FailureLocation() returns the location of the failure (or an empty CodeLocation if the test hasn't failed) +func (report SpecReport) FailureLocation() CodeLocation { + return report.Failure.Location +} + +// Timeline() returns a timeline view of the report +func (report SpecReport) Timeline() Timeline { + timeline := Timeline{} + if !report.Failure.IsZero() { + timeline = append(timeline, report.Failure) + if report.Failure.AdditionalFailure != nil { + timeline = append(timeline, *(report.Failure.AdditionalFailure)) + } + } + for _, additionalFailure := range report.AdditionalFailures { + timeline = append(timeline, additionalFailure) + } + for _, reportEntry := range report.ReportEntries { + timeline = append(timeline, reportEntry) + } + for _, progressReport := range report.ProgressReports { + timeline = append(timeline, progressReport) + } + for _, specEvent := range report.SpecEvents { + timeline = append(timeline, specEvent) + } + sort.Sort(timeline) + return timeline +} + +type SpecReports []SpecReport + +// WithLeafNodeType returns the subset of SpecReports with LeafNodeType matching one of the requested NodeTypes +func (reports SpecReports) WithLeafNodeType(nodeTypes NodeType) SpecReports { + count := 0 + for i := range reports { + if reports[i].LeafNodeType.Is(nodeTypes) { + count++ + } + } + + out := make(SpecReports, count) + j := 0 + for i := range reports { + if reports[i].LeafNodeType.Is(nodeTypes) { + out[j] = reports[i] + j++ + } + } + return out +} + +// WithState returns the subset of SpecReports with State matching one of the requested SpecStates +func (reports SpecReports) WithState(states SpecState) SpecReports { + count := 0 + for i := range reports { + if reports[i].State.Is(states) { + count++ + } + } + + out, j := make(SpecReports, count), 0 + for i := range reports { + if reports[i].State.Is(states) { + out[j] = reports[i] + j++ + } + } + return out +} + +// CountWithState returns the number of SpecReports with State matching one of the requested SpecStates +func (reports SpecReports) CountWithState(states SpecState) int { + n := 0 + for i := range reports { + if reports[i].State.Is(states) { + n += 1 + } + } + return n +} + +// If the Spec passes, CountOfFlakedSpecs returns the number of SpecReports that failed after multiple attempts. +func (reports SpecReports) CountOfFlakedSpecs() int { + n := 0 + for i := range reports { + if reports[i].MaxFlakeAttempts > 1 && reports[i].State.Is(SpecStatePassed) && reports[i].NumAttempts > 1 { + n += 1 + } + } + return n +} + +// If the Spec fails, CountOfRepeatedSpecs returns the number of SpecReports that passed after multiple attempts +func (reports SpecReports) CountOfRepeatedSpecs() int { + n := 0 + for i := range reports { + if reports[i].MaxMustPassRepeatedly > 1 && reports[i].State.Is(SpecStateFailureStates) && reports[i].NumAttempts > 1 { + n += 1 + } + } + return n +} + +// TimelineLocation captures the location of an event in the spec's timeline +type TimelineLocation struct { + //Offset is the offset (in bytes) of the event relative to the GinkgoWriter stream + Offset int `json:",omitempty"` + + //Order is the order of the event with respect to other events. The absolute value of Order + //is irrelevant. All that matters is that an event with a lower Order occurs before ane vent with a higher Order + Order int `json:",omitempty"` + + Time time.Time +} + +// TimelineEvent represent an event on the timeline +// consumers of Timeline will need to check the concrete type of each entry to determine how to handle it +type TimelineEvent interface { + GetTimelineLocation() TimelineLocation +} + +type Timeline []TimelineEvent + +func (t Timeline) Len() int { return len(t) } +func (t Timeline) Less(i, j int) bool { + return t[i].GetTimelineLocation().Order < t[j].GetTimelineLocation().Order +} +func (t Timeline) Swap(i, j int) { t[i], t[j] = t[j], t[i] } +func (t Timeline) WithoutHiddenReportEntries() Timeline { + out := Timeline{} + for _, event := range t { + if reportEntry, isReportEntry := event.(ReportEntry); isReportEntry && reportEntry.Visibility == ReportEntryVisibilityNever { + continue + } + out = append(out, event) + } + return out +} + +func (t Timeline) WithoutVeryVerboseSpecEvents() Timeline { + out := Timeline{} + for _, event := range t { + if specEvent, isSpecEvent := event.(SpecEvent); isSpecEvent && specEvent.IsOnlyVisibleAtVeryVerbose() { + continue + } + out = append(out, event) + } + return out +} + +// Failure captures failure information for an individual test +type Failure struct { + // Message - the failure message passed into Fail(...). When using a matcher library + // like Gomega, this will contain the failure message generated by Gomega. + // + // Message is also populated if the user has called Skip(...). + Message string + + // Location - the CodeLocation where the failure occurred + // This CodeLocation will include a fully-populated StackTrace + Location CodeLocation + + TimelineLocation TimelineLocation + + // ForwardedPanic - if the failure represents a captured panic (i.e. Summary.State == SpecStatePanicked) + // then ForwardedPanic will be populated with a string representation of the captured panic. + ForwardedPanic string `json:",omitempty"` + + // FailureNodeContext - one of three contexts describing the node in which the failure occurred: + // FailureNodeIsLeafNode means the failure occurred in the leaf node of the associated SpecReport. None of the other FailureNode fields will be populated + // FailureNodeAtTopLevel means the failure occurred in a non-leaf node that is defined at the top-level of the spec (i.e. not in a container). FailureNodeType and FailureNodeLocation will be populated. + // FailureNodeInContainer means the failure occurred in a non-leaf node that is defined within a container. FailureNodeType, FailureNodeLocation, and FailureNodeContainerIndex will be populated. + // + // FailureNodeType will contain the NodeType of the node in which the failure occurred. + // FailureNodeLocation will contain the CodeLocation of the node in which the failure occurred. + // If populated, FailureNodeContainerIndex will be the index into SpecReport.ContainerHierarchyTexts and SpecReport.ContainerHierarchyLocations that represents the parent container of the node in which the failure occurred. + FailureNodeContext FailureNodeContext `json:",omitempty"` + + FailureNodeType NodeType `json:",omitempty"` + + FailureNodeLocation CodeLocation `json:",omitempty"` + + FailureNodeContainerIndex int `json:",omitempty"` + + //ProgressReport is populated if the spec was interrupted or timed out + ProgressReport ProgressReport `json:",omitempty"` + + //AdditionalFailure is non-nil if a follow-on failure occurred within the same node after the primary failure. This only happens when a node has timed out or been interrupted. In such cases the AdditionalFailure can include information about where/why the spec was stuck. + AdditionalFailure *AdditionalFailure `json:",omitempty"` +} + +func (f Failure) IsZero() bool { + return f.Message == "" && (f.Location == CodeLocation{}) +} + +func (f Failure) GetTimelineLocation() TimelineLocation { + return f.TimelineLocation +} + +// FailureNodeContext captures the location context for the node containing the failing line of code +type FailureNodeContext uint + +const ( + FailureNodeContextInvalid FailureNodeContext = iota + + FailureNodeIsLeafNode + FailureNodeAtTopLevel + FailureNodeInContainer +) + +var fncEnumSupport = NewEnumSupport(map[uint]string{ + uint(FailureNodeContextInvalid): "INVALID FAILURE NODE CONTEXT", + uint(FailureNodeIsLeafNode): "leaf-node", + uint(FailureNodeAtTopLevel): "top-level", + uint(FailureNodeInContainer): "in-container", +}) + +func (fnc FailureNodeContext) String() string { + return fncEnumSupport.String(uint(fnc)) +} +func (fnc *FailureNodeContext) UnmarshalJSON(b []byte) error { + out, err := fncEnumSupport.UnmarshJSON(b) + *fnc = FailureNodeContext(out) + return err +} +func (fnc FailureNodeContext) MarshalJSON() ([]byte, error) { + return fncEnumSupport.MarshJSON(uint(fnc)) +} + +// AdditionalFailure capturs any additional failures that occur after the initial failure of a psec +// these typically occur in clean up nodes after the spec has failed. +// We can't simply use Failure as we want to track the SpecState to know what kind of failure this is +type AdditionalFailure struct { + State SpecState + Failure Failure +} + +func (f AdditionalFailure) GetTimelineLocation() TimelineLocation { + return f.Failure.TimelineLocation +} + +// SpecState captures the state of a spec +// To determine if a given `state` represents a failure state, use `state.Is(SpecStateFailureStates)` +type SpecState uint + +const ( + SpecStateInvalid SpecState = 0 + + SpecStatePending SpecState = 1 << iota + SpecStateSkipped + SpecStatePassed + SpecStateFailed + SpecStateAborted + SpecStatePanicked + SpecStateInterrupted + SpecStateTimedout +) + +var ssEnumSupport = NewEnumSupport(map[uint]string{ + uint(SpecStateInvalid): "INVALID SPEC STATE", + uint(SpecStatePending): "pending", + uint(SpecStateSkipped): "skipped", + uint(SpecStatePassed): "passed", + uint(SpecStateFailed): "failed", + uint(SpecStateAborted): "aborted", + uint(SpecStatePanicked): "panicked", + uint(SpecStateInterrupted): "interrupted", + uint(SpecStateTimedout): "timedout", +}) + +func (ss SpecState) String() string { + return ssEnumSupport.String(uint(ss)) +} +func (ss SpecState) GomegaString() string { + return ssEnumSupport.String(uint(ss)) +} +func (ss *SpecState) UnmarshalJSON(b []byte) error { + out, err := ssEnumSupport.UnmarshJSON(b) + *ss = SpecState(out) + return err +} +func (ss SpecState) MarshalJSON() ([]byte, error) { + return ssEnumSupport.MarshJSON(uint(ss)) +} + +var SpecStateFailureStates = SpecStateFailed | SpecStateTimedout | SpecStateAborted | SpecStatePanicked | SpecStateInterrupted + +func (ss SpecState) Is(states SpecState) bool { + return ss&states != 0 +} + +// ProgressReport captures the progress of the current spec. It is, effectively, a structured Ginkgo-aware stack trace +type ProgressReport struct { + Message string `json:",omitempty"` + ParallelProcess int `json:",omitempty"` + RunningInParallel bool `json:",omitempty"` + + ContainerHierarchyTexts []string `json:",omitempty"` + LeafNodeText string `json:",omitempty"` + LeafNodeLocation CodeLocation `json:",omitempty"` + SpecStartTime time.Time `json:",omitempty"` + + CurrentNodeType NodeType `json:",omitempty"` + CurrentNodeText string `json:",omitempty"` + CurrentNodeLocation CodeLocation `json:",omitempty"` + CurrentNodeStartTime time.Time `json:",omitempty"` + + CurrentStepText string `json:",omitempty"` + CurrentStepLocation CodeLocation `json:",omitempty"` + CurrentStepStartTime time.Time `json:",omitempty"` + + AdditionalReports []string `json:",omitempty"` + + CapturedGinkgoWriterOutput string `json:",omitempty"` + TimelineLocation TimelineLocation `json:",omitempty"` + + Goroutines []Goroutine `json:",omitempty"` +} + +func (pr ProgressReport) IsZero() bool { + return pr.CurrentNodeType == NodeTypeInvalid +} + +func (pr ProgressReport) Time() time.Time { + return pr.TimelineLocation.Time +} + +func (pr ProgressReport) SpecGoroutine() Goroutine { + for _, goroutine := range pr.Goroutines { + if goroutine.IsSpecGoroutine { + return goroutine + } + } + return Goroutine{} +} + +func (pr ProgressReport) HighlightedGoroutines() []Goroutine { + out := []Goroutine{} + for _, goroutine := range pr.Goroutines { + if goroutine.IsSpecGoroutine || !goroutine.HasHighlights() { + continue + } + out = append(out, goroutine) + } + return out +} + +func (pr ProgressReport) OtherGoroutines() []Goroutine { + out := []Goroutine{} + for _, goroutine := range pr.Goroutines { + if goroutine.IsSpecGoroutine || goroutine.HasHighlights() { + continue + } + out = append(out, goroutine) + } + return out +} + +func (pr ProgressReport) WithoutCapturedGinkgoWriterOutput() ProgressReport { + out := pr + out.CapturedGinkgoWriterOutput = "" + return out +} + +func (pr ProgressReport) WithoutOtherGoroutines() ProgressReport { + out := pr + filteredGoroutines := []Goroutine{} + for _, goroutine := range pr.Goroutines { + if goroutine.IsSpecGoroutine || goroutine.HasHighlights() { + filteredGoroutines = append(filteredGoroutines, goroutine) + } + } + out.Goroutines = filteredGoroutines + return out +} + +func (pr ProgressReport) GetTimelineLocation() TimelineLocation { + return pr.TimelineLocation +} + +type Goroutine struct { + ID uint64 + State string + Stack []FunctionCall + IsSpecGoroutine bool +} + +func (g Goroutine) IsZero() bool { + return g.ID == 0 +} + +func (g Goroutine) HasHighlights() bool { + for _, fc := range g.Stack { + if fc.Highlight { + return true + } + } + + return false +} + +type FunctionCall struct { + Function string + Filename string + Line int + Highlight bool `json:",omitempty"` + Source []string `json:",omitempty"` + SourceHighlight int `json:",omitempty"` +} + +// NodeType captures the type of a given Ginkgo Node +type NodeType uint + +const ( + NodeTypeInvalid NodeType = 0 + + NodeTypeContainer NodeType = 1 << iota + NodeTypeIt + + NodeTypeBeforeEach + NodeTypeJustBeforeEach + NodeTypeAfterEach + NodeTypeJustAfterEach + + NodeTypeBeforeAll + NodeTypeAfterAll + + NodeTypeBeforeSuite + NodeTypeSynchronizedBeforeSuite + NodeTypeAfterSuite + NodeTypeSynchronizedAfterSuite + + NodeTypeReportBeforeEach + NodeTypeReportAfterEach + NodeTypeReportBeforeSuite + NodeTypeReportAfterSuite + + NodeTypeCleanupInvalid + NodeTypeCleanupAfterEach + NodeTypeCleanupAfterAll + NodeTypeCleanupAfterSuite +) + +var NodeTypesForContainerAndIt = NodeTypeContainer | NodeTypeIt +var NodeTypesForSuiteLevelNodes = NodeTypeBeforeSuite | NodeTypeSynchronizedBeforeSuite | NodeTypeAfterSuite | NodeTypeSynchronizedAfterSuite | NodeTypeReportBeforeSuite | NodeTypeReportAfterSuite | NodeTypeCleanupAfterSuite +var NodeTypesAllowedDuringCleanupInterrupt = NodeTypeAfterEach | NodeTypeJustAfterEach | NodeTypeAfterAll | NodeTypeAfterSuite | NodeTypeSynchronizedAfterSuite | NodeTypeCleanupAfterEach | NodeTypeCleanupAfterAll | NodeTypeCleanupAfterSuite +var NodeTypesAllowedDuringReportInterrupt = NodeTypeReportBeforeEach | NodeTypeReportAfterEach | NodeTypeReportBeforeSuite | NodeTypeReportAfterSuite + +var ntEnumSupport = NewEnumSupport(map[uint]string{ + uint(NodeTypeInvalid): "INVALID NODE TYPE", + uint(NodeTypeContainer): "Container", + uint(NodeTypeIt): "It", + uint(NodeTypeBeforeEach): "BeforeEach", + uint(NodeTypeJustBeforeEach): "JustBeforeEach", + uint(NodeTypeAfterEach): "AfterEach", + uint(NodeTypeJustAfterEach): "JustAfterEach", + uint(NodeTypeBeforeAll): "BeforeAll", + uint(NodeTypeAfterAll): "AfterAll", + uint(NodeTypeBeforeSuite): "BeforeSuite", + uint(NodeTypeSynchronizedBeforeSuite): "SynchronizedBeforeSuite", + uint(NodeTypeAfterSuite): "AfterSuite", + uint(NodeTypeSynchronizedAfterSuite): "SynchronizedAfterSuite", + uint(NodeTypeReportBeforeEach): "ReportBeforeEach", + uint(NodeTypeReportAfterEach): "ReportAfterEach", + uint(NodeTypeReportBeforeSuite): "ReportBeforeSuite", + uint(NodeTypeReportAfterSuite): "ReportAfterSuite", + uint(NodeTypeCleanupInvalid): "DeferCleanup", + uint(NodeTypeCleanupAfterEach): "DeferCleanup (Each)", + uint(NodeTypeCleanupAfterAll): "DeferCleanup (All)", + uint(NodeTypeCleanupAfterSuite): "DeferCleanup (Suite)", +}) + +func (nt NodeType) String() string { + return ntEnumSupport.String(uint(nt)) +} +func (nt *NodeType) UnmarshalJSON(b []byte) error { + out, err := ntEnumSupport.UnmarshJSON(b) + *nt = NodeType(out) + return err +} +func (nt NodeType) MarshalJSON() ([]byte, error) { + return ntEnumSupport.MarshJSON(uint(nt)) +} + +func (nt NodeType) Is(nodeTypes NodeType) bool { + return nt&nodeTypes != 0 +} + +/* +SpecEvent captures a vareity of events that can occur when specs run. See SpecEventType for the list of available events. +*/ +type SpecEvent struct { + SpecEventType SpecEventType + + CodeLocation CodeLocation + TimelineLocation TimelineLocation + + Message string `json:",omitempty"` + Duration time.Duration `json:",omitempty"` + NodeType NodeType `json:",omitempty"` + Attempt int `json:",omitempty"` +} + +func (se SpecEvent) GetTimelineLocation() TimelineLocation { + return se.TimelineLocation +} + +func (se SpecEvent) IsOnlyVisibleAtVeryVerbose() bool { + return se.SpecEventType.Is(SpecEventByEnd | SpecEventNodeStart | SpecEventNodeEnd) +} + +func (se SpecEvent) GomegaString() string { + out := &strings.Builder{} + out.WriteString("[" + se.SpecEventType.String() + " SpecEvent] ") + if se.Message != "" { + out.WriteString("Message=") + out.WriteString(`"` + se.Message + `",`) + } + if se.Duration != 0 { + out.WriteString("Duration=" + se.Duration.String() + ",") + } + if se.NodeType != NodeTypeInvalid { + out.WriteString("NodeType=" + se.NodeType.String() + ",") + } + if se.Attempt != 0 { + out.WriteString(fmt.Sprintf("Attempt=%d", se.Attempt) + ",") + } + out.WriteString("CL=" + se.CodeLocation.String() + ",") + out.WriteString(fmt.Sprintf("TL.Offset=%d", se.TimelineLocation.Offset)) + + return out.String() +} + +type SpecEvents []SpecEvent + +func (se SpecEvents) WithType(seType SpecEventType) SpecEvents { + out := SpecEvents{} + for _, event := range se { + if event.SpecEventType.Is(seType) { + out = append(out, event) + } + } + return out +} + +type SpecEventType uint + +const ( + SpecEventInvalid SpecEventType = 0 + + SpecEventByStart SpecEventType = 1 << iota + SpecEventByEnd + SpecEventNodeStart + SpecEventNodeEnd + SpecEventSpecRepeat + SpecEventSpecRetry +) + +var seEnumSupport = NewEnumSupport(map[uint]string{ + uint(SpecEventInvalid): "INVALID SPEC EVENT", + uint(SpecEventByStart): "By", + uint(SpecEventByEnd): "By (End)", + uint(SpecEventNodeStart): "Node", + uint(SpecEventNodeEnd): "Node (End)", + uint(SpecEventSpecRepeat): "Repeat", + uint(SpecEventSpecRetry): "Retry", +}) + +func (se SpecEventType) String() string { + return seEnumSupport.String(uint(se)) +} +func (se *SpecEventType) UnmarshalJSON(b []byte) error { + out, err := seEnumSupport.UnmarshJSON(b) + *se = SpecEventType(out) + return err +} +func (se SpecEventType) MarshalJSON() ([]byte, error) { + return seEnumSupport.MarshJSON(uint(se)) +} + +func (se SpecEventType) Is(specEventTypes SpecEventType) bool { + return se&specEventTypes != 0 +} diff --git a/backend/vendor/github.com/onsi/ginkgo/v2/types/version.go b/backend/vendor/github.com/onsi/ginkgo/v2/types/version.go new file mode 100644 index 0000000..b9c1ea9 --- /dev/null +++ b/backend/vendor/github.com/onsi/ginkgo/v2/types/version.go @@ -0,0 +1,3 @@ +package types + +const VERSION = "2.27.2" diff --git a/backend/vendor/github.com/quic-go/qpack/.codecov.yml b/backend/vendor/github.com/quic-go/qpack/.codecov.yml new file mode 100644 index 0000000..00064af --- /dev/null +++ b/backend/vendor/github.com/quic-go/qpack/.codecov.yml @@ -0,0 +1,7 @@ +coverage: + round: nearest + status: + project: + default: + threshold: 1 + patch: false diff --git a/backend/vendor/github.com/quic-go/qpack/.gitignore b/backend/vendor/github.com/quic-go/qpack/.gitignore new file mode 100644 index 0000000..66c189a --- /dev/null +++ b/backend/vendor/github.com/quic-go/qpack/.gitignore @@ -0,0 +1,6 @@ +fuzzing/*.zip +fuzzing/coverprofile +fuzzing/crashers +fuzzing/sonarprofile +fuzzing/suppressions +fuzzing/corpus/ diff --git a/backend/vendor/github.com/quic-go/qpack/.gitmodules b/backend/vendor/github.com/quic-go/qpack/.gitmodules new file mode 100644 index 0000000..5ac16f0 --- /dev/null +++ b/backend/vendor/github.com/quic-go/qpack/.gitmodules @@ -0,0 +1,3 @@ +[submodule "integrationtests/interop/qifs"] + path = integrationtests/interop/qifs + url = https://github.com/qpackers/qifs.git diff --git a/backend/vendor/github.com/quic-go/qpack/.golangci.yml b/backend/vendor/github.com/quic-go/qpack/.golangci.yml new file mode 100644 index 0000000..e6b574e --- /dev/null +++ b/backend/vendor/github.com/quic-go/qpack/.golangci.yml @@ -0,0 +1,23 @@ +run: +linters-settings: +linters: + disable-all: true + enable: + - asciicheck + - copyloopvar + - exhaustive + - goconst + - gofmt # redundant, since gofmt *should* be a no-op after gofumpt + - gofumpt + - goimports + - gosimple + - govet + - ineffassign + - misspell + - prealloc + - staticcheck + - stylecheck + - unconvert + - unparam + - unused + diff --git a/backend/vendor/github.com/quic-go/qpack/LICENSE.md b/backend/vendor/github.com/quic-go/qpack/LICENSE.md new file mode 100644 index 0000000..1ac5a2d --- /dev/null +++ b/backend/vendor/github.com/quic-go/qpack/LICENSE.md @@ -0,0 +1,7 @@ +Copyright 2019 Marten Seemann + +Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/backend/vendor/github.com/quic-go/qpack/README.md b/backend/vendor/github.com/quic-go/qpack/README.md new file mode 100644 index 0000000..5bf1f77 --- /dev/null +++ b/backend/vendor/github.com/quic-go/qpack/README.md @@ -0,0 +1,21 @@ +# QPACK + +[![PkgGoDev](https://pkg.go.dev/badge/github.com/quic-go/qpack)](https://pkg.go.dev/github.com/quic-go/qpack) +[![Code Coverage](https://img.shields.io/codecov/c/github/quic-go/qpack/master.svg?style=flat-square)](https://codecov.io/gh/quic-go/qpack) +[![Fuzzing Status](https://oss-fuzz-build-logs.storage.googleapis.com/badges/quic-go.svg)](https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:quic-go) + +This is a minimal QPACK ([RFC 9204](https://datatracker.ietf.org/doc/html/rfc9204)) implementation in Go. It is minimal in the sense that it doesn't use the dynamic table at all, but just the static table and (Huffman encoded) string literals. Wherever possible, it reuses code from the [HPACK implementation in the Go standard library](https://github.com/golang/net/tree/master/http2/hpack). + +It is interoperable with other QPACK implementations (both encoders and decoders), however it won't achieve a high compression efficiency. If you're interested in dynamic table support, please comment on [the issue](https://github.com/quic-go/qpack/issues/33). + +## Running the Interop Tests + +Install the [QPACK interop files](https://github.com/qpackers/qifs/) by running +```bash +git submodule update --init --recursive +``` + +Then run the tests: +```bash +go test -v ./integrationtests/interop/ +``` diff --git a/backend/vendor/github.com/quic-go/qpack/decoder.go b/backend/vendor/github.com/quic-go/qpack/decoder.go new file mode 100644 index 0000000..88ea8eb --- /dev/null +++ b/backend/vendor/github.com/quic-go/qpack/decoder.go @@ -0,0 +1,275 @@ +package qpack + +import ( + "bytes" + "errors" + "fmt" + "sync" + + "golang.org/x/net/http2/hpack" +) + +// A decodingError is something the spec defines as a decoding error. +type decodingError struct { + err error +} + +func (de decodingError) Error() string { + return fmt.Sprintf("decoding error: %v", de.err) +} + +// An invalidIndexError is returned when an encoder references a table +// entry before the static table or after the end of the dynamic table. +type invalidIndexError int + +func (e invalidIndexError) Error() string { + return fmt.Sprintf("invalid indexed representation index %d", int(e)) +} + +var errNoDynamicTable = decodingError{errors.New("no dynamic table")} + +// errNeedMore is an internal sentinel error value that means the +// buffer is truncated and we need to read more data before we can +// continue parsing. +var errNeedMore = errors.New("need more data") + +// A Decoder is the decoding context for incremental processing of +// header blocks. +type Decoder struct { + mutex sync.Mutex + + emitFunc func(f HeaderField) + + readRequiredInsertCount bool + readDeltaBase bool + + // buf is the unparsed buffer. It's only written to + // saveBuf if it was truncated in the middle of a header + // block. Because it's usually not owned, we can only + // process it under Write. + buf []byte // not owned; only valid during Write + + // saveBuf is previous data passed to Write which we weren't able + // to fully parse before. Unlike buf, we own this data. + saveBuf bytes.Buffer +} + +// NewDecoder returns a new decoder +// The emitFunc will be called for each valid field parsed, +// in the same goroutine as calls to Write, before Write returns. +func NewDecoder(emitFunc func(f HeaderField)) *Decoder { + return &Decoder{emitFunc: emitFunc} +} + +func (d *Decoder) Write(p []byte) (int, error) { + if len(p) == 0 { + return 0, nil + } + + d.mutex.Lock() + n, err := d.writeLocked(p) + d.mutex.Unlock() + return n, err +} + +func (d *Decoder) writeLocked(p []byte) (int, error) { + // Only copy the data if we have to. Optimistically assume + // that p will contain a complete header block. + if d.saveBuf.Len() == 0 { + d.buf = p + } else { + d.saveBuf.Write(p) + d.buf = d.saveBuf.Bytes() + d.saveBuf.Reset() + } + + if err := d.decode(); err != nil { + if err != errNeedMore { + return 0, err + } + // TODO: limit the size of the buffer + d.saveBuf.Write(d.buf) + } + return len(p), nil +} + +// DecodeFull decodes an entire block. +func (d *Decoder) DecodeFull(p []byte) ([]HeaderField, error) { + if len(p) == 0 { + return []HeaderField{}, nil + } + + d.mutex.Lock() + defer d.mutex.Unlock() + + saveFunc := d.emitFunc + defer func() { d.emitFunc = saveFunc }() + + var hf []HeaderField + d.emitFunc = func(f HeaderField) { hf = append(hf, f) } + if _, err := d.writeLocked(p); err != nil { + return nil, err + } + if err := d.Close(); err != nil { + return nil, err + } + return hf, nil +} + +// Close declares that the decoding is complete and resets the Decoder +// to be reused again for a new header block. If there is any remaining +// data in the decoder's buffer, Close returns an error. +func (d *Decoder) Close() error { + if d.saveBuf.Len() > 0 { + d.saveBuf.Reset() + return decodingError{errors.New("truncated headers")} + } + d.readRequiredInsertCount = false + d.readDeltaBase = false + return nil +} + +func (d *Decoder) decode() error { + if !d.readRequiredInsertCount { + requiredInsertCount, rest, err := readVarInt(8, d.buf) + if err != nil { + return err + } + d.readRequiredInsertCount = true + if requiredInsertCount != 0 { + return decodingError{errors.New("expected Required Insert Count to be zero")} + } + d.buf = rest + } + if !d.readDeltaBase { + base, rest, err := readVarInt(7, d.buf) + if err != nil { + return err + } + d.readDeltaBase = true + if base != 0 { + return decodingError{errors.New("expected Base to be zero")} + } + d.buf = rest + } + if len(d.buf) == 0 { + return errNeedMore + } + + for len(d.buf) > 0 { + b := d.buf[0] + var err error + switch { + case b&0x80 > 0: // 1xxxxxxx + err = d.parseIndexedHeaderField() + case b&0xc0 == 0x40: // 01xxxxxx + err = d.parseLiteralHeaderField() + case b&0xe0 == 0x20: // 001xxxxx + err = d.parseLiteralHeaderFieldWithoutNameReference() + default: + err = fmt.Errorf("unexpected type byte: %#x", b) + } + if err != nil { + return err + } + } + return nil +} + +func (d *Decoder) parseIndexedHeaderField() error { + buf := d.buf + if buf[0]&0x40 == 0 { + return errNoDynamicTable + } + index, buf, err := readVarInt(6, buf) + if err != nil { + return err + } + hf, ok := d.at(index) + if !ok { + return decodingError{invalidIndexError(index)} + } + d.emitFunc(hf) + d.buf = buf + return nil +} + +func (d *Decoder) parseLiteralHeaderField() error { + buf := d.buf + if buf[0]&0x10 == 0 { + return errNoDynamicTable + } + // We don't need to check the value of the N-bit here. + // It's only relevant when re-encoding header fields, + // and determines whether the header field can be added to the dynamic table. + // Since we don't support the dynamic table, we can ignore it. + index, buf, err := readVarInt(4, buf) + if err != nil { + return err + } + hf, ok := d.at(index) + if !ok { + return decodingError{invalidIndexError(index)} + } + if len(buf) == 0 { + return errNeedMore + } + usesHuffman := buf[0]&0x80 > 0 + val, buf, err := d.readString(buf, 7, usesHuffman) + if err != nil { + return err + } + hf.Value = val + d.emitFunc(hf) + d.buf = buf + return nil +} + +func (d *Decoder) parseLiteralHeaderFieldWithoutNameReference() error { + buf := d.buf + usesHuffmanForName := buf[0]&0x8 > 0 + name, buf, err := d.readString(buf, 3, usesHuffmanForName) + if err != nil { + return err + } + if len(buf) == 0 { + return errNeedMore + } + usesHuffmanForVal := buf[0]&0x80 > 0 + val, buf, err := d.readString(buf, 7, usesHuffmanForVal) + if err != nil { + return err + } + d.emitFunc(HeaderField{Name: name, Value: val}) + d.buf = buf + return nil +} + +func (d *Decoder) readString(buf []byte, n uint8, usesHuffman bool) (string, []byte, error) { + l, buf, err := readVarInt(n, buf) + if err != nil { + return "", nil, err + } + if uint64(len(buf)) < l { + return "", nil, errNeedMore + } + var val string + if usesHuffman { + var err error + val, err = hpack.HuffmanDecodeToString(buf[:l]) + if err != nil { + return "", nil, err + } + } else { + val = string(buf[:l]) + } + buf = buf[l:] + return val, buf, nil +} + +func (d *Decoder) at(i uint64) (hf HeaderField, ok bool) { + if i >= uint64(len(staticTableEntries)) { + return + } + return staticTableEntries[i], true +} diff --git a/backend/vendor/github.com/quic-go/qpack/encoder.go b/backend/vendor/github.com/quic-go/qpack/encoder.go new file mode 100644 index 0000000..ad69535 --- /dev/null +++ b/backend/vendor/github.com/quic-go/qpack/encoder.go @@ -0,0 +1,95 @@ +package qpack + +import ( + "io" + + "golang.org/x/net/http2/hpack" +) + +// An Encoder performs QPACK encoding. +type Encoder struct { + wrotePrefix bool + + w io.Writer + buf []byte +} + +// NewEncoder returns a new Encoder which performs QPACK encoding. An +// encoded data is written to w. +func NewEncoder(w io.Writer) *Encoder { + return &Encoder{w: w} +} + +// WriteField encodes f into a single Write to e's underlying Writer. +// This function may also produce bytes for the Header Block Prefix +// if necessary. If produced, it is done before encoding f. +func (e *Encoder) WriteField(f HeaderField) error { + // write the Header Block Prefix + if !e.wrotePrefix { + e.buf = appendVarInt(e.buf, 8, 0) + e.buf = appendVarInt(e.buf, 7, 0) + e.wrotePrefix = true + } + + idxAndVals, nameFound := encoderMap[f.Name] + if nameFound { + if idxAndVals.values == nil { + if len(f.Value) == 0 { + e.writeIndexedField(idxAndVals.idx) + } else { + e.writeLiteralFieldWithNameReference(&f, idxAndVals.idx) + } + } else { + valIdx, valueFound := idxAndVals.values[f.Value] + if valueFound { + e.writeIndexedField(valIdx) + } else { + e.writeLiteralFieldWithNameReference(&f, idxAndVals.idx) + } + } + } else { + e.writeLiteralFieldWithoutNameReference(f) + } + + _, err := e.w.Write(e.buf) + e.buf = e.buf[:0] + return err +} + +// Close declares that the encoding is complete and resets the Encoder +// to be reused again for a new header block. +func (e *Encoder) Close() error { + e.wrotePrefix = false + return nil +} + +func (e *Encoder) writeLiteralFieldWithoutNameReference(f HeaderField) { + offset := len(e.buf) + e.buf = appendVarInt(e.buf, 3, hpack.HuffmanEncodeLength(f.Name)) + e.buf[offset] ^= 0x20 ^ 0x8 + e.buf = hpack.AppendHuffmanString(e.buf, f.Name) + offset = len(e.buf) + e.buf = appendVarInt(e.buf, 7, hpack.HuffmanEncodeLength(f.Value)) + e.buf[offset] ^= 0x80 + e.buf = hpack.AppendHuffmanString(e.buf, f.Value) +} + +// Encodes a header field whose name is present in one of the tables. +func (e *Encoder) writeLiteralFieldWithNameReference(f *HeaderField, id uint8) { + offset := len(e.buf) + e.buf = appendVarInt(e.buf, 4, uint64(id)) + // Set the 01NTxxxx pattern, forcing N to 0 and T to 1 + e.buf[offset] ^= 0x50 + offset = len(e.buf) + e.buf = appendVarInt(e.buf, 7, hpack.HuffmanEncodeLength(f.Value)) + e.buf[offset] ^= 0x80 + e.buf = hpack.AppendHuffmanString(e.buf, f.Value) +} + +// Encodes an indexed field, meaning it's entirely defined in one of the tables. +func (e *Encoder) writeIndexedField(id uint8) { + offset := len(e.buf) + e.buf = appendVarInt(e.buf, 6, uint64(id)) + // Set the 1Txxxxxx pattern, forcing T to 1 + e.buf[offset] ^= 0xc0 +} diff --git a/backend/vendor/github.com/quic-go/qpack/header_field.go b/backend/vendor/github.com/quic-go/qpack/header_field.go new file mode 100644 index 0000000..4c043a9 --- /dev/null +++ b/backend/vendor/github.com/quic-go/qpack/header_field.go @@ -0,0 +1,16 @@ +package qpack + +// A HeaderField is a name-value pair. Both the name and value are +// treated as opaque sequences of octets. +type HeaderField struct { + Name string + Value string +} + +// IsPseudo reports whether the header field is an HTTP3 pseudo header. +// That is, it reports whether it starts with a colon. +// It is not otherwise guaranteed to be a valid pseudo header field, +// though. +func (hf HeaderField) IsPseudo() bool { + return len(hf.Name) != 0 && hf.Name[0] == ':' +} diff --git a/backend/vendor/github.com/quic-go/qpack/static_table.go b/backend/vendor/github.com/quic-go/qpack/static_table.go new file mode 100644 index 0000000..73c365e --- /dev/null +++ b/backend/vendor/github.com/quic-go/qpack/static_table.go @@ -0,0 +1,255 @@ +package qpack + +var staticTableEntries = [...]HeaderField{ + {Name: ":authority"}, + {Name: ":path", Value: "/"}, + {Name: "age", Value: "0"}, + {Name: "content-disposition"}, + {Name: "content-length", Value: "0"}, + {Name: "cookie"}, + {Name: "date"}, + {Name: "etag"}, + {Name: "if-modified-since"}, + {Name: "if-none-match"}, + {Name: "last-modified"}, + {Name: "link"}, + {Name: "location"}, + {Name: "referer"}, + {Name: "set-cookie"}, + {Name: ":method", Value: "CONNECT"}, + {Name: ":method", Value: "DELETE"}, + {Name: ":method", Value: "GET"}, + {Name: ":method", Value: "HEAD"}, + {Name: ":method", Value: "OPTIONS"}, + {Name: ":method", Value: "POST"}, + {Name: ":method", Value: "PUT"}, + {Name: ":scheme", Value: "http"}, + {Name: ":scheme", Value: "https"}, + {Name: ":status", Value: "103"}, + {Name: ":status", Value: "200"}, + {Name: ":status", Value: "304"}, + {Name: ":status", Value: "404"}, + {Name: ":status", Value: "503"}, + {Name: "accept", Value: "*/*"}, + {Name: "accept", Value: "application/dns-message"}, + {Name: "accept-encoding", Value: "gzip, deflate, br"}, + {Name: "accept-ranges", Value: "bytes"}, + {Name: "access-control-allow-headers", Value: "cache-control"}, + {Name: "access-control-allow-headers", Value: "content-type"}, + {Name: "access-control-allow-origin", Value: "*"}, + {Name: "cache-control", Value: "max-age=0"}, + {Name: "cache-control", Value: "max-age=2592000"}, + {Name: "cache-control", Value: "max-age=604800"}, + {Name: "cache-control", Value: "no-cache"}, + {Name: "cache-control", Value: "no-store"}, + {Name: "cache-control", Value: "public, max-age=31536000"}, + {Name: "content-encoding", Value: "br"}, + {Name: "content-encoding", Value: "gzip"}, + {Name: "content-type", Value: "application/dns-message"}, + {Name: "content-type", Value: "application/javascript"}, + {Name: "content-type", Value: "application/json"}, + {Name: "content-type", Value: "application/x-www-form-urlencoded"}, + {Name: "content-type", Value: "image/gif"}, + {Name: "content-type", Value: "image/jpeg"}, + {Name: "content-type", Value: "image/png"}, + {Name: "content-type", Value: "text/css"}, + {Name: "content-type", Value: "text/html; charset=utf-8"}, + {Name: "content-type", Value: "text/plain"}, + {Name: "content-type", Value: "text/plain;charset=utf-8"}, + {Name: "range", Value: "bytes=0-"}, + {Name: "strict-transport-security", Value: "max-age=31536000"}, + {Name: "strict-transport-security", Value: "max-age=31536000; includesubdomains"}, + {Name: "strict-transport-security", Value: "max-age=31536000; includesubdomains; preload"}, + {Name: "vary", Value: "accept-encoding"}, + {Name: "vary", Value: "origin"}, + {Name: "x-content-type-options", Value: "nosniff"}, + {Name: "x-xss-protection", Value: "1; mode=block"}, + {Name: ":status", Value: "100"}, + {Name: ":status", Value: "204"}, + {Name: ":status", Value: "206"}, + {Name: ":status", Value: "302"}, + {Name: ":status", Value: "400"}, + {Name: ":status", Value: "403"}, + {Name: ":status", Value: "421"}, + {Name: ":status", Value: "425"}, + {Name: ":status", Value: "500"}, + {Name: "accept-language"}, + {Name: "access-control-allow-credentials", Value: "FALSE"}, + {Name: "access-control-allow-credentials", Value: "TRUE"}, + {Name: "access-control-allow-headers", Value: "*"}, + {Name: "access-control-allow-methods", Value: "get"}, + {Name: "access-control-allow-methods", Value: "get, post, options"}, + {Name: "access-control-allow-methods", Value: "options"}, + {Name: "access-control-expose-headers", Value: "content-length"}, + {Name: "access-control-request-headers", Value: "content-type"}, + {Name: "access-control-request-method", Value: "get"}, + {Name: "access-control-request-method", Value: "post"}, + {Name: "alt-svc", Value: "clear"}, + {Name: "authorization"}, + {Name: "content-security-policy", Value: "script-src 'none'; object-src 'none'; base-uri 'none'"}, + {Name: "early-data", Value: "1"}, + {Name: "expect-ct"}, + {Name: "forwarded"}, + {Name: "if-range"}, + {Name: "origin"}, + {Name: "purpose", Value: "prefetch"}, + {Name: "server"}, + {Name: "timing-allow-origin", Value: "*"}, + {Name: "upgrade-insecure-requests", Value: "1"}, + {Name: "user-agent"}, + {Name: "x-forwarded-for"}, + {Name: "x-frame-options", Value: "deny"}, + {Name: "x-frame-options", Value: "sameorigin"}, +} + +// Only needed for tests. +// use go:linkname to retrieve the static table. +// +//nolint:deadcode,unused +func getStaticTable() []HeaderField { + return staticTableEntries[:] +} + +type indexAndValues struct { + idx uint8 + values map[string]uint8 +} + +// A map of the header names from the static table to their index in the table. +// This is used by the encoder to quickly find if a header is in the static table +// and what value should be used to encode it. +// There's a second level of mapping for the headers that have some predefined +// values in the static table. +var encoderMap = map[string]indexAndValues{ + ":authority": {0, nil}, + ":path": {1, map[string]uint8{"/": 1}}, + "age": {2, map[string]uint8{"0": 2}}, + "content-disposition": {3, nil}, + "content-length": {4, map[string]uint8{"0": 4}}, + "cookie": {5, nil}, + "date": {6, nil}, + "etag": {7, nil}, + "if-modified-since": {8, nil}, + "if-none-match": {9, nil}, + "last-modified": {10, nil}, + "link": {11, nil}, + "location": {12, nil}, + "referer": {13, nil}, + "set-cookie": {14, nil}, + ":method": {15, map[string]uint8{ + "CONNECT": 15, + "DELETE": 16, + "GET": 17, + "HEAD": 18, + "OPTIONS": 19, + "POST": 20, + "PUT": 21, + }}, + ":scheme": {22, map[string]uint8{ + "http": 22, + "https": 23, + }}, + ":status": {24, map[string]uint8{ + "103": 24, + "200": 25, + "304": 26, + "404": 27, + "503": 28, + "100": 63, + "204": 64, + "206": 65, + "302": 66, + "400": 67, + "403": 68, + "421": 69, + "425": 70, + "500": 71, + }}, + "accept": {29, map[string]uint8{ + "*/*": 29, + "application/dns-message": 30, + }}, + "accept-encoding": {31, map[string]uint8{"gzip, deflate, br": 31}}, + "accept-ranges": {32, map[string]uint8{"bytes": 32}}, + "access-control-allow-headers": {33, map[string]uint8{ + "cache-control": 33, + "content-type": 34, + "*": 75, + }}, + "access-control-allow-origin": {35, map[string]uint8{"*": 35}}, + "cache-control": {36, map[string]uint8{ + "max-age=0": 36, + "max-age=2592000": 37, + "max-age=604800": 38, + "no-cache": 39, + "no-store": 40, + "public, max-age=31536000": 41, + }}, + "content-encoding": {42, map[string]uint8{ + "br": 42, + "gzip": 43, + }}, + "content-type": {44, map[string]uint8{ + "application/dns-message": 44, + "application/javascript": 45, + "application/json": 46, + "application/x-www-form-urlencoded": 47, + "image/gif": 48, + "image/jpeg": 49, + "image/png": 50, + "text/css": 51, + "text/html; charset=utf-8": 52, + "text/plain": 53, + "text/plain;charset=utf-8": 54, + }}, + "range": {55, map[string]uint8{"bytes=0-": 55}}, + "strict-transport-security": {56, map[string]uint8{ + "max-age=31536000": 56, + "max-age=31536000; includesubdomains": 57, + "max-age=31536000; includesubdomains; preload": 58, + }}, + "vary": {59, map[string]uint8{ + "accept-encoding": 59, + "origin": 60, + }}, + "x-content-type-options": {61, map[string]uint8{"nosniff": 61}}, + "x-xss-protection": {62, map[string]uint8{"1; mode=block": 62}}, + // ":status" is duplicated and takes index 63 to 71 + "accept-language": {72, nil}, + "access-control-allow-credentials": {73, map[string]uint8{ + "FALSE": 73, + "TRUE": 74, + }}, + // "access-control-allow-headers" is duplicated and takes index 75 + "access-control-allow-methods": {76, map[string]uint8{ + "get": 76, + "get, post, options": 77, + "options": 78, + }}, + "access-control-expose-headers": {79, map[string]uint8{"content-length": 79}}, + "access-control-request-headers": {80, map[string]uint8{"content-type": 80}}, + "access-control-request-method": {81, map[string]uint8{ + "get": 81, + "post": 82, + }}, + "alt-svc": {83, map[string]uint8{"clear": 83}}, + "authorization": {84, nil}, + "content-security-policy": {85, map[string]uint8{ + "script-src 'none'; object-src 'none'; base-uri 'none'": 85, + }}, + "early-data": {86, map[string]uint8{"1": 86}}, + "expect-ct": {87, nil}, + "forwarded": {88, nil}, + "if-range": {89, nil}, + "origin": {90, nil}, + "purpose": {91, map[string]uint8{"prefetch": 91}}, + "server": {92, nil}, + "timing-allow-origin": {93, map[string]uint8{"*": 93}}, + "upgrade-insecure-requests": {94, map[string]uint8{"1": 94}}, + "user-agent": {95, nil}, + "x-forwarded-for": {96, nil}, + "x-frame-options": {97, map[string]uint8{ + "deny": 97, + "sameorigin": 98, + }}, +} diff --git a/backend/vendor/github.com/quic-go/qpack/varint.go b/backend/vendor/github.com/quic-go/qpack/varint.go new file mode 100644 index 0000000..28d7112 --- /dev/null +++ b/backend/vendor/github.com/quic-go/qpack/varint.go @@ -0,0 +1,66 @@ +package qpack + +// copied from the Go standard library HPACK implementation + +import "errors" + +var errVarintOverflow = errors.New("varint integer overflow") + +// appendVarInt appends i, as encoded in variable integer form using n +// bit prefix, to dst and returns the extended buffer. +// +// See +// http://http2.github.io/http2-spec/compression.html#integer.representation +func appendVarInt(dst []byte, n byte, i uint64) []byte { + k := uint64((1 << n) - 1) + if i < k { + return append(dst, byte(i)) + } + dst = append(dst, byte(k)) + i -= k + for ; i >= 128; i >>= 7 { + dst = append(dst, byte(0x80|(i&0x7f))) + } + return append(dst, byte(i)) +} + +// readVarInt reads an unsigned variable length integer off the +// beginning of p. n is the parameter as described in +// http://http2.github.io/http2-spec/compression.html#rfc.section.5.1. +// +// n must always be between 1 and 8. +// +// The returned remain buffer is either a smaller suffix of p, or err != nil. +// The error is errNeedMore if p doesn't contain a complete integer. +func readVarInt(n byte, p []byte) (i uint64, remain []byte, err error) { + if n < 1 || n > 8 { + panic("bad n") + } + if len(p) == 0 { + return 0, p, errNeedMore + } + i = uint64(p[0]) + if n < 8 { + i &= (1 << uint64(n)) - 1 + } + if i < (1< 0 { + b := p[0] + p = p[1:] + i += uint64(b&127) << m + if b&128 == 0 { + return i, p, nil + } + m += 7 + if m >= 63 { // TODO: proper overflow check. making this up. + return 0, origP, errVarintOverflow + } + } + return 0, origP, errNeedMore +} diff --git a/backend/vendor/github.com/refraction-networking/utls/.travis.yml b/backend/vendor/github.com/refraction-networking/utls/.travis.yml new file mode 100644 index 0000000..0069725 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/.travis.yml @@ -0,0 +1,19 @@ +language: go + +go: + - "1.11.x" + +sudo: required +dist: trusty + +install: + - go get -t ./... + - go get golang.org/x/lint/golint + # Install gometalinter + - go get github.com/alecthomas/gometalinter + +script: + - go test -race -v . + - gometalinter --install + - gometalinter --disable-all -E vet -E ineffassign --tests . + - gometalinter --disable-all -E gofmt -E misspell -E goimports --tests u_* diff --git a/backend/vendor/github.com/refraction-networking/utls/CONTRIBUTING.md b/backend/vendor/github.com/refraction-networking/utls/CONTRIBUTING.md new file mode 100644 index 0000000..6d364e1 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/CONTRIBUTING.md @@ -0,0 +1,23 @@ +# How to Contribute + +We'd love to accept your patches and contributions to this project. There are +just a few small guidelines you need to follow. + +## Contributor License Agreement + +Contributions to this project must be accompanied by a Contributor License +Agreement. You (or your employer) retain the copyright to your contribution, +this simply gives us permission to use and redistribute your contributions as +part of the project. Head over to to see +your current agreements on file or to sign a new one. + +You generally only need to submit a CLA once, so if you've already submitted one +(even if it was for a different project), you probably don't need to do it +again. + +## Code reviews + +All submissions, including submissions by project members, require review. We +use GitHub pull requests for this purpose. Consult +[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more +information on using pull requests. \ No newline at end of file diff --git a/backend/vendor/github.com/refraction-networking/utls/CONTRIBUTORS_GUIDE.md b/backend/vendor/github.com/refraction-networking/utls/CONTRIBUTORS_GUIDE.md new file mode 100644 index 0000000..7dcfb2d --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/CONTRIBUTORS_GUIDE.md @@ -0,0 +1,69 @@ +# How this package works +### Chapter 1: [Making private things public](./u_public.go) +There are numerous handshake-related structs in crypto/tls, most of which are either private or have private fields. +One of them — `clientHandshakeState` — has private function `handshake()`, +which is called in the beginning of default handshake. +Unfortunately, user will not be able to directly access this struct outside of tls package. +As a result, we decided to employ following workaround: declare public copies of private structs. +Now user is free to manipulate fields of public `ClientHandshakeState`. +Then, right before handshake, we can shallow-copy public state into private `clientHandshakeState`, +call `handshake()` on it and carry on with default Golang handshake process. +After handshake is done we shallow-copy private state back to public, allowing user to read results of handshake. + +### Chapter 2: [TLSExtension](./u_tls_extensions.go) +The way we achieve reasonable flexibilty with extensions is inspired by +[ztls'](https://github.com/zmap/zcrypto/blob/master/tls/handshake_extensions.go) design. +However, our design has several differences, so we wrote it from scratch. +This design allows us to have an array of `TLSExtension` objects and then marshal them in order: +```Golang +type TLSExtension interface { + writeToUConn(*UConn) error + + Len() int // includes header + + // Read reads up to len(p) bytes into p. + // It returns the number of bytes read (0 <= n <= len(p)) and any error encountered. + Read(p []byte) (n int, err error) // implements io.Reader +} +``` +`writeToUConn()` applies appropriate per-extension changes to `UConn`. + +`Len()` provides the size of marshaled extension, so we can allocate appropriate buffer beforehand, +catch out-of-bound errors easily and guide size-dependent extensions such as padding. + +`Read(buffer []byte)` _writes(see: io.Reader interface)_ marshaled extensions into provided buffer. +This avoids extra allocations. + +### Chapter 3: [UConn](./u_conn.go) +`UConn` extends standard `tls.Conn`. Most notably, it stores slice with `TLSExtension`s and public +`ClientHandshakeState`. +Whenever `UConn.BuildHandshakeState()` gets called (happens automatically in `UConn.Handshake()` +or could be called manually), config will be applied according to chosen `ClientHelloID`. +From contributor's view there are 2 main behaviors: + * `HelloGolang` simply calls default Golang's [`makeClientHello()`](./handshake_client.go) + and directly stores it into `HandshakeState.Hello`. utls-specific stuff is ignored. + * Other ClientHelloIDs fill `UConn.Hello.{Random, CipherSuites, CompressionMethods}` and `UConn.Extensions` with +per-parrot setup, which then gets applied to appropriate standard tls structs, +and then marshaled by utls into `HandshakeState.Hello`. + +### Chapter 4: Tests + +Tests exist, but coverage is very limited. What's covered is a conjunction of + * TLS 1.2 + * Working parrots without any unsupported extensions (only Android 5.1 at this time) + * Ciphersuites offered by parrot. + * Ciphersuites supported by Golang + * Simple conversation with reference implementation of OpenSSL. +(e.g. no automatic checks for renegotiations, parroting quality and such) + +plus we test some other minor things. +Basically, current tests aim to provide a sanity check. + +# Merging upstream +```Bash +git remote add -f golang git@github.com:golang/go.git +git checkout -b golang-upstream golang/master +git subtree split -P src/crypto/tls/ -b golang-tls-upstream +git checkout master +git merge --no-commit golang-tls-upstream +``` diff --git a/backend/vendor/github.com/refraction-networking/utls/LICENSE b/backend/vendor/github.com/refraction-networking/utls/LICENSE new file mode 100644 index 0000000..6a66aea --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/LICENSE @@ -0,0 +1,27 @@ +Copyright (c) 2009 The Go Authors. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/backend/vendor/github.com/refraction-networking/utls/README.md b/backend/vendor/github.com/refraction-networking/utls/README.md new file mode 100644 index 0000000..0309ef9 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/README.md @@ -0,0 +1,315 @@ +# ![uTLS](logo_small.png) uTLS +[![Build Status](https://github.com/refraction-networking/utls/actions/workflows/go.yml/badge.svg?branch=master)](https://github.com/refraction-networking/utls/actions/workflows/go.yml) +[![godoc](https://img.shields.io/badge/godoc-reference-blue.svg)](https://godoc.org/github.com/refraction-networking/utls#UConn) +--- +uTLS is a fork of "crypto/tls", which provides ClientHello fingerprinting resistance, low-level access to handshake, fake session tickets and some other features. Handshake is still performed by "crypto/tls", this library merely changes ClientHello part of it and provides low-level access. + +**Minimum Go Version**: Go 1.21 + +If you have any questions, bug reports or contributions, you are welcome to publish those on GitHub. If you want to do so in private, ~~you can contact one of developers personally via sergey.frolov@colorado.edu~~. + +You can contact one of developers personally via gaukas.wang@colorado.edu. + +Documentation below may not keep up with all the changes and new features at all times, +so you are encouraged to use [godoc](https://godoc.org/github.com/refraction-networking/utls#UConn). + +*Note: Information provided below in this README.md could be obsolete. We welcome +any contributions to refresh the documentations in addition to code contributions.* + +# Features +## Low-level access to handshake +* Read/write access to all bits of client hello message. +* Read access to fields of ClientHandshakeState, which, among other things, includes ServerHello and MasterSecret. +* Read keystream. Can be used, for example, to "write" something in ciphertext. + +## ClientHello fingerprinting resistance +Golang's ClientHello has a very unique fingerprint, which especially sticks out on mobile clients, +where Golang is not too popular yet. +Some members of anti-censorship community are concerned that their tools could be trivially blocked based on +ClientHello with relatively small collateral damage. There are multiple solutions to this issue. + +**It is highly recommended to use multiple fingeprints, including randomized ones to avoid relying on a single fingerprint.** +[utls.Roller](#roller) does this automatically. + +### Randomized Fingerprint +Randomized Fingerprints are supposedly good at defeating blacklists, since +those fingerprints have random ciphersuites and extensions in random order. +Note that all used ciphersuites and extensions are fully supported by uTLS, +which provides a solid moving target without any compatibility or parrot-is-dead attack risks. + +But note that there's a small chance that generated fingerprint won't work, +so you may want to keep generating until a working one is found, +and then keep reusing the working fingerprint to avoid suspicious behavior of constantly changing fingerprints. +[utls.Roller](#roller) reuses working fingerprint automatically. + +#### Generating randomized fingerprints + +To generate a randomized fingerprint, simply do: +```Golang +uTlsConn := tls.UClient(tcpConn, &config, tls.HelloRandomized) +``` +you can use `helloRandomizedALPN` or `helloRandomizedNoALPN` to ensure presence or absence of +ALPN(Application-Layer Protocol Negotiation) extension. +It is recommended, but certainly not required to include ALPN (or use helloRandomized which may or may not include ALPN). +If you do use ALPN, you will want to correctly handle potential application layer protocols (likely h2 or http/1.1). + +#### Reusing randomized fingerprint +```Golang +// oldConn is an old connection that worked before, so we want to reuse it +// newConn is a new connection we'd like to establish +newConn := tls.UClient(tcpConn, &config, oldConn.ClientHelloID) +``` + +### Parroting +This package can be used to parrot ClientHello of popular browsers. +There are some caveats to this parroting: +* We are forced to offer ciphersuites and tls extensions that are not supported by crypto/tls. +This is not a problem, if you fully control the server and turn unsupported things off on server side. +* Parroting could be imperfect, and there is no parroting beyond ClientHello. +#### Compatibility risks of available parrots + +| Parrot | Ciphers* | Signature* | Unsupported extensions | TLS Fingerprint ID | +| ------------- | -------- | ---------- | ---------------------- | --------------------------------------------- | +| Chrome 62 | no | no | ChannelID | [0a4a74aeebd1bb66](https://tlsfingerprint.io/id/0a4a74aeebd1bb66) | +| Chrome 70 | no | no | ChannelID, Encrypted Certs | [bc4c7e42f4961cd7](https://tlsfingerprint.io/id/bc4c7e42f4961cd7) | +| Chrome 72 | no | no | ChannelID, Encrypted Certs | [bbf04e5f1881f506](https://tlsfingerprint.io/id/bbf04e5f1881f506) | +| Chrome 83 | no | no | ChannelID, Encrypted Certs | [9c673fd64a32c8dc](https://tlsfingerprint.io/id/9c673fd64a32c8dc) | +| Firefox 56 | very low | no | None | [c884bad7f40bee56](https://tlsfingerprint.io/id/c884bad7f40bee56) | +| Firefox 65 | very low | no | MaxRecordSize | [6bfedc5d5c740d58](https://tlsfingerprint.io/id/6bfedc5d5c740d58) | +| iOS 11.1 | low** | no | None | [71a81bafd58e1301](https://tlsfingerprint.io/id/71a81bafd58e1301) | +| iOS 12.1 | low** | no | None | [ec55e5b4136c7949](https://tlsfingerprint.io/id/ec55e5b4136c7949) | + +\* Denotes very rough guesstimate of likelihood that unsupported things will get echoed back by the server in the wild, +*visibly breaking the connection*. +\*\* No risk, if `utls.EnableWeakCiphers()` is called prior to using it. + +#### Parrots FAQ +> Does it really look like, say, Google Chrome with all the [GREASE](https://tools.ietf.org/html/draft-davidben-tls-grease-01) and stuff? + +It LGTM, but please open up Wireshark and check. If you see something — [say something](https://github.com/refraction-networking/utls/issues). + +> Aren't there side channels? Everybody knows that the ~~bird is a word~~[parrot is dead](https://people.cs.umass.edu/~amir/papers/parrot.pdf) + +There sure are. If you found one that approaches practicality at line speed — [please tell us](https://github.com/refraction-networking/utls/issues). + +However, there is a difference between this sort of parroting and techniques like SkypeMorth. +Namely, TLS is highly standardized protocol, therefore simply not that many subtle things in TLS protocol +could be different and/or suddenly change in one of mimicked implementation(potentially undermining the mimicry). +It is possible that we have a distinguisher right now, but amount of those potential distinguishers is limited. + +### Custom Handshake +It is possible to create custom handshake by +1) Use `HelloCustom` as an argument for `UClient()` to get empty config +2) Fill tls header fields: UConn.Hello.{Random, CipherSuites, CompressionMethods}, if needed, or stick to defaults. +3) Configure and add various [TLS Extensions](u_tls_extensions.go) to UConn.Extensions: they will be marshaled in order. +4) Set Session and SessionCache, as needed. + +If you need to manually control all the bytes on the wire(certainly not recommended!), +you can set UConn.HandshakeStateBuilt = true, and marshal clientHello into UConn.HandshakeState.Hello.raw yourself. +In this case you will be responsible for modifying other parts of Config and ClientHelloMsg to reflect your setup +and not confuse "crypto/tls", which will be processing response from server. + +### Fingerprinting Captured Client Hello +You can use a captured client hello to generate new ones that mimic/have the same properties as the original. +The generated client hellos _should_ look like they were generated from the same client software as the original fingerprinted bytes. +In order to do this: +1) Create a `ClientHelloSpec` from the raw bytes of the original client hello +2) Use `HelloCustom` as an argument for `UClient()` to get empty config +3) Use `ApplyPreset` with the generated `ClientHelloSpec` to set the appropriate connection properties +``` +uConn := UClient(&net.TCPConn{}, nil, HelloCustom) +fingerprinter := &Fingerprinter{} +generatedSpec, err := fingerprinter.FingerprintClientHello(rawCapturedClientHelloBytes) +if err != nil { + panic("fingerprinting failed: %v", err) +} +if err := uConn.ApplyPreset(generatedSpec); err != nil { + panic("applying generated spec failed: %v", err) +} +``` +The `rawCapturedClientHelloBytes` should be the full tls record, including the record type/version/length header. + +## Roller + +A simple wrapper, that allows to easily use multiple latest(auto-updated) fingerprints. + +```Golang +// NewRoller creates Roller object with default range of HelloIDs to cycle +// through until a working/unblocked one is found. +func NewRoller() (*Roller, error) +``` + +```Golang +// Dial attempts to connect to given address using different HelloIDs. +// If a working HelloID is found, it is used again for subsequent Dials. +// If tcp connection fails or all HelloIDs are tried, returns with last error. +// +// Usage examples: +// +// Dial("tcp4", "google.com:443", "google.com") +// Dial("tcp", "10.23.144.22:443", "mywebserver.org") +func (c *Roller) Dial(network, addr, serverName string) (*UConn, error) +``` + +## Fake Session Tickets +Fake session tickets is a very nifty trick that allows power users to hide parts of handshake, which may have some very fingerprintable features of handshake, and saves 1 RTT. +Currently, there is a simple function to set session ticket to any desired state: + +```Golang +// If you want you session tickets to be reused - use same cache on following connections +func (uconn *UConn) SetSessionState(session *ClientSessionState) +``` + +Note that session tickets (fake ones or otherwise) are not reused. +To reuse tickets, create a shared cache and set it on current and further configs: + +```Golang +// If you want you session tickets to be reused - use same cache on following connections +func (uconn *UConn) SetSessionCache(cache ClientSessionCache) +``` + +## Custom TLS extensions +If you want to add your own fake (placeholder, without added functionality) extension for mimicry purposes, you can embed `*tls.GenericExtension` into your own struct and override `Len()` and `Read()` methods. For example, [DelegatedCredentials](https://datatracker.ietf.org/doc/draft-ietf-tls-subcerts/) extension can be implemented as follows: + +```Golang +const FakeDelegatedCredentials uint16 = 0x0022 + +type FakeDelegatedCredentialsExtension struct { + *tls.GenericExtension + SignatureAlgorithms []tls.SignatureScheme +} + +func (e *FakeDelegatedCredentialsExtension) Len() int { + return 6 + 2*len(e.SignatureAlgorithms) +} + +func (e *FakeDelegatedCredentialsExtension) Read(b []byte) (n int, err error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + offset := 0 + appendUint16 := func(val uint16) { + b[offset] = byte(val >> 8) + b[offset+1] = byte(val & 0xff) + offset += 2 + } + + // Extension type + appendUint16(FakeDelegatedCredentials) + + algosLength := 2 * len(e.SignatureAlgorithms) + + // Extension data length + appendUint16(uint16(algosLength) + 2) + + // Algorithms list length + appendUint16(uint16(algosLength)) + + // Algorithms list + for _, a := range e.SignatureAlgorithms { + appendUint16(uint16(a)) + } + return e.Len(), io.EOF +} +``` + +Then it can be used just like normal extension: + +```Golang +&tls.ClientHelloSpec{ + //... + Extensions: []tls.TLSExtension{ + //... + &FakeDelegatedCredentialsExtension{ + SignatureAlgorithms: []tls.SignatureScheme{ + tls.ECDSAWithP256AndSHA256, + tls.ECDSAWithP384AndSHA384, + tls.ECDSAWithP521AndSHA512, + tls.ECDSAWithSHA1, + }, + }, + //... + } + //... +} +``` + +# Client Hello IDs +See full list of `clientHelloID` values [here](https://godoc.org/github.com/refraction-networking/utls#ClientHelloID). +There are different behaviors you can get, depending on your `clientHelloID`: + +1. ```utls.HelloRandomized``` adds/reorders extensions, ciphersuites, etc. randomly. +`HelloRandomized` adds ALPN in a percentage of cases, you may want to use `HelloRandomizedALPN` or +`HelloRandomizedNoALPN` to choose specific behavior explicitly, as ALPN might affect application layer. +2. ```utls.HelloGolang``` + HelloGolang will use default "crypto/tls" handshake marshaling codepath, which WILL + overwrite your changes to Hello(Config, Session are fine). + You might want to call BuildHandshakeState() before applying any changes. + UConn.Extensions will be completely ignored. +3. ```utls.HelloCustom``` +will prepare ClientHello with empty uconn.Extensions so you can fill it with TLSExtension's manually. +4. The rest will will parrot given browser. Such parrots include, for example: + * `utls.HelloChrome_Auto`- parrots recommended(usually latest) Google Chrome version + * `utls.HelloChrome_58` - parrots Google Chrome 58 + * `utls.HelloFirefox_Auto` - parrots recommended(usually latest) Firefox version + * `utls.HelloFirefox_55` - parrots Firefox 55 + +# Usage +## Examples +Find basic examples [here](examples/examples.go). +Here's a more [advanced example](https://github.com/sergeyfrolov/gotapdance/blob//9a777f35a04b0c4c5dacd30bca0e9224eb737b5e/tapdance/conn_raw.go#L275-L292) showing how to generate randomized ClientHello, modify generated ciphersuites a bit, and proceed with the handshake. +### Migrating from "crypto/tls" +Here's how default "crypto/tls" is typically used: +```Golang + dialConn, err := net.Dial("tcp", "172.217.11.46:443") + if err != nil { + fmt.Printf("net.Dial() failed: %+v\n", err) + return + } + + config := tls.Config{ServerName: "www.google.com"} + tlsConn := tls.Client(dialConn, &config) + n, err = tlsConn.Write("Hello, World!") + //... +``` +To start using using uTLS: +1. Import this library (e.g. `import tls "github.com/refraction-networking/utls"`) +2. Pick the [Client Hello ID](#client-hello-ids) +3. Simply substitute `tlsConn := tls.Client(dialConn, &config)` +with `tlsConn := tls.UClient(dialConn, &config, tls.clientHelloID)` + +### Customizing handshake +Some customizations(such as setting session ticket/clientHello) have easy-to-use functions for them. The idea is to make common manipulations easy: +```Golang + cRandom := []byte{100, 101, 102, 103, 104, 105, 106, 107, 108, 109, + 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, + 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, + 130, 131} + tlsConn.SetClientRandom(cRandom) + masterSecret := make([]byte, 48) + copy(masterSecret, []byte("masterSecret is NOT sent over the wire")) // you may use it for real security + + // Create a session ticket that wasn't actually issued by the server. + sessionState := utls.MakeClientSessionState(sessionTicket, uint16(tls.VersionTLS12), + tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + masterSecret, + nil, nil) + tlsConn.SetSessionState(sessionState) +``` + +For other customizations there are following functions +``` +// you can use this to build the state manually and change it +// for example use Randomized ClientHello, and add more extensions +func (uconn *UConn) BuildHandshakeState() error +``` +``` +// Then apply the changes and marshal final bytes, which will be sent +func (uconn *UConn) MarshalClientHello() error +``` + +## Contributors' guide +Please refer to [this document](./CONTRIBUTORS_GUIDE.md) if you're interested in internals + +## Credits +The initial development of uTLS was completed during an internship at [Google Jigsaw](https://jigsaw.google.com/). This is not an official Google product. diff --git a/backend/vendor/github.com/refraction-networking/utls/SECURITY.md b/backend/vendor/github.com/refraction-networking/utls/SECURITY.md new file mode 100644 index 0000000..14a5481 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/SECURITY.md @@ -0,0 +1,11 @@ +# Security Policy + +## Supported Versions + +We will only maintain one branch which is the master branch. Unless otherwise requested, no security patches will be applied to older Major/Minor versions. + +## Reporting a Vulnerability + +For a vulnerability of low to no severity, which causing no threats to security, you may report it openly to us by [opening an issue](https://github.com/refraction-networking/utls/issues/new) + +If the vulnerability you are reporting inflicts some security impact, please [do so privately](https://github.com/refraction-networking/utls/security/advisories/new). diff --git a/backend/vendor/github.com/refraction-networking/utls/alert.go b/backend/vendor/github.com/refraction-networking/utls/alert.go new file mode 100644 index 0000000..2301c06 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/alert.go @@ -0,0 +1,111 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import "strconv" + +// An AlertError is a TLS alert. +// +// When using a QUIC transport, QUICConn methods will return an error +// which wraps AlertError rather than sending a TLS alert. +type AlertError uint8 + +func (e AlertError) Error() string { + return alert(e).String() +} + +type alert uint8 + +const ( + // alert level + alertLevelWarning = 1 + alertLevelError = 2 +) + +const ( + alertCloseNotify alert = 0 + alertUnexpectedMessage alert = 10 + alertBadRecordMAC alert = 20 + alertDecryptionFailed alert = 21 + alertRecordOverflow alert = 22 + alertDecompressionFailure alert = 30 + alertHandshakeFailure alert = 40 + alertBadCertificate alert = 42 + alertUnsupportedCertificate alert = 43 + alertCertificateRevoked alert = 44 + alertCertificateExpired alert = 45 + alertCertificateUnknown alert = 46 + alertIllegalParameter alert = 47 + alertUnknownCA alert = 48 + alertAccessDenied alert = 49 + alertDecodeError alert = 50 + alertDecryptError alert = 51 + alertExportRestriction alert = 60 + alertProtocolVersion alert = 70 + alertInsufficientSecurity alert = 71 + alertInternalError alert = 80 + alertInappropriateFallback alert = 86 + alertUserCanceled alert = 90 + alertNoRenegotiation alert = 100 + alertMissingExtension alert = 109 + alertUnsupportedExtension alert = 110 + alertCertificateUnobtainable alert = 111 + alertUnrecognizedName alert = 112 + alertBadCertificateStatusResponse alert = 113 + alertBadCertificateHashValue alert = 114 + alertUnknownPSKIdentity alert = 115 + alertCertificateRequired alert = 116 + alertNoApplicationProtocol alert = 120 + alertECHRequired alert = 121 +) + +var alertText = map[alert]string{ + alertCloseNotify: "close notify", + alertUnexpectedMessage: "unexpected message", + alertBadRecordMAC: "bad record MAC", + alertDecryptionFailed: "decryption failed", + alertRecordOverflow: "record overflow", + alertDecompressionFailure: "decompression failure", + alertHandshakeFailure: "handshake failure", + alertBadCertificate: "bad certificate", + alertUnsupportedCertificate: "unsupported certificate", + alertCertificateRevoked: "revoked certificate", + alertCertificateExpired: "expired certificate", + alertCertificateUnknown: "unknown certificate", + alertIllegalParameter: "illegal parameter", + alertUnknownCA: "unknown certificate authority", + alertAccessDenied: "access denied", + alertDecodeError: "error decoding message", + alertDecryptError: "error decrypting message", + alertExportRestriction: "export restriction", + alertProtocolVersion: "protocol version not supported", + alertInsufficientSecurity: "insufficient security level", + alertInternalError: "internal error", + alertInappropriateFallback: "inappropriate fallback", + alertUserCanceled: "user canceled", + alertNoRenegotiation: "no renegotiation", + alertMissingExtension: "missing extension", + alertUnsupportedExtension: "unsupported extension", + alertCertificateUnobtainable: "certificate unobtainable", + alertUnrecognizedName: "unrecognized name", + alertBadCertificateStatusResponse: "bad certificate status response", + alertBadCertificateHashValue: "bad certificate hash value", + alertUnknownPSKIdentity: "unknown PSK identity", + alertCertificateRequired: "certificate required", + alertNoApplicationProtocol: "no application protocol", + alertECHRequired: "encrypted client hello required", +} + +func (e alert) String() string { + s, ok := alertText[e] + if ok { + return "tls: " + s + } + return "tls: alert(" + strconv.Itoa(int(e)) + ")" +} + +func (e alert) Error() string { + return e.String() +} diff --git a/backend/vendor/github.com/refraction-networking/utls/auth.go b/backend/vendor/github.com/refraction-networking/utls/auth.go new file mode 100644 index 0000000..680192f --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/auth.go @@ -0,0 +1,344 @@ +// Copyright 2017 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bytes" + "crypto" + "crypto/ecdsa" + "crypto/ed25519" + "crypto/elliptic" + "crypto/rsa" + "errors" + "fmt" + "hash" + "io" + + circlPki "github.com/cloudflare/circl/pki" + circlSign "github.com/cloudflare/circl/sign" +) + +// verifyHandshakeSignature verifies a signature against pre-hashed +// (if required) handshake contents. +func verifyHandshakeSignature(sigType uint8, pubkey crypto.PublicKey, hashFunc crypto.Hash, signed, sig []byte) error { + switch sigType { + case signatureECDSA: + pubKey, ok := pubkey.(*ecdsa.PublicKey) + if !ok { + return fmt.Errorf("expected an ECDSA public key, got %T", pubkey) + } + if !ecdsa.VerifyASN1(pubKey, signed, sig) { + return errors.New("ECDSA verification failure") + } + case signatureEd25519: + pubKey, ok := pubkey.(ed25519.PublicKey) + if !ok { + return fmt.Errorf("expected an Ed25519 public key, got %T", pubkey) + } + if !ed25519.Verify(pubKey, signed, sig) { + return errors.New("Ed25519 verification failure") + } + case signaturePKCS1v15: + pubKey, ok := pubkey.(*rsa.PublicKey) + if !ok { + return fmt.Errorf("expected an RSA public key, got %T", pubkey) + } + if err := rsa.VerifyPKCS1v15(pubKey, hashFunc, signed, sig); err != nil { + return err + } + case signatureRSAPSS: + pubKey, ok := pubkey.(*rsa.PublicKey) + if !ok { + return fmt.Errorf("expected an RSA public key, got %T", pubkey) + } + signOpts := &rsa.PSSOptions{SaltLength: rsa.PSSSaltLengthEqualsHash} + if err := rsa.VerifyPSS(pubKey, hashFunc, signed, sig, signOpts); err != nil { + return err + } + default: + // [UTLS SECTION BEGINS] + // Ported from cloudflare/go + scheme := circlSchemeBySigType(sigType) + if scheme == nil { + return errors.New("internal error: unknown signature type") + } + pubKey, ok := pubkey.(circlSign.PublicKey) + if !ok { + return fmt.Errorf("expected a %s public key, got %T", scheme.Name(), pubkey) + } + if !scheme.Verify(pubKey, signed, sig, nil) { + return fmt.Errorf("%s verification failure", scheme.Name()) + } + // [UTLS SECTION ENDS] + } + return nil +} + +const ( + serverSignatureContext = "TLS 1.3, server CertificateVerify\x00" + clientSignatureContext = "TLS 1.3, client CertificateVerify\x00" +) + +var signaturePadding = []byte{ + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, +} + +// signedMessage returns the pre-hashed (if necessary) message to be signed by +// certificate keys in TLS 1.3. See RFC 8446, Section 4.4.3. +func signedMessage(sigHash crypto.Hash, context string, transcript hash.Hash) []byte { + if sigHash == directSigning { + b := &bytes.Buffer{} + b.Write(signaturePadding) + io.WriteString(b, context) + b.Write(transcript.Sum(nil)) + return b.Bytes() + } + h := sigHash.New() + h.Write(signaturePadding) + io.WriteString(h, context) + h.Write(transcript.Sum(nil)) + return h.Sum(nil) +} + +// typeAndHashFromSignatureScheme returns the corresponding signature type and +// crypto.Hash for a given TLS SignatureScheme. +func typeAndHashFromSignatureScheme(signatureAlgorithm SignatureScheme) (sigType uint8, hash crypto.Hash, err error) { + switch signatureAlgorithm { + case PKCS1WithSHA1, PKCS1WithSHA256, PKCS1WithSHA384, PKCS1WithSHA512: + sigType = signaturePKCS1v15 + case PSSWithSHA256, PSSWithSHA384, PSSWithSHA512: + sigType = signatureRSAPSS + case ECDSAWithSHA1, ECDSAWithP256AndSHA256, ECDSAWithP384AndSHA384, ECDSAWithP521AndSHA512: + sigType = signatureECDSA + case Ed25519: + sigType = signatureEd25519 + default: + // [UTLS SECTION BEGINS] + // Ported from cloudflare/go + scheme := circlPki.SchemeByTLSID(uint(signatureAlgorithm)) + if scheme == nil { + return 0, 0, fmt.Errorf("unsupported signature algorithm: %v", signatureAlgorithm) + } + sigType = sigTypeByCirclScheme(scheme) + if sigType == 0 { + return 0, 0, fmt.Errorf("circl scheme %s not supported", + scheme.Name()) + } + // [UTLS SECTION ENDS] + } + switch signatureAlgorithm { + case PKCS1WithSHA1, ECDSAWithSHA1: + hash = crypto.SHA1 + case PKCS1WithSHA256, PSSWithSHA256, ECDSAWithP256AndSHA256: + hash = crypto.SHA256 + case PKCS1WithSHA384, PSSWithSHA384, ECDSAWithP384AndSHA384: + hash = crypto.SHA384 + case PKCS1WithSHA512, PSSWithSHA512, ECDSAWithP521AndSHA512: + hash = crypto.SHA512 + case Ed25519: + hash = directSigning + default: + // [UTLS SECTION BEGINS] + // Ported from cloudflare/go + scheme := circlPki.SchemeByTLSID(uint(signatureAlgorithm)) + if scheme == nil { + return 0, 0, fmt.Errorf("unsupported signature algorithm: %v", signatureAlgorithm) + } + hash = directSigning + // [UTLS SECTION ENDS] + } + return sigType, hash, nil +} + +// legacyTypeAndHashFromPublicKey returns the fixed signature type and crypto.Hash for +// a given public key used with TLS 1.0 and 1.1, before the introduction of +// signature algorithm negotiation. +func legacyTypeAndHashFromPublicKey(pub crypto.PublicKey) (sigType uint8, hash crypto.Hash, err error) { + switch pub.(type) { + case *rsa.PublicKey: + return signaturePKCS1v15, crypto.MD5SHA1, nil + case *ecdsa.PublicKey: + return signatureECDSA, crypto.SHA1, nil + case ed25519.PublicKey: + // RFC 8422 specifies support for Ed25519 in TLS 1.0 and 1.1, + // but it requires holding on to a handshake transcript to do a + // full signature, and not even OpenSSL bothers with the + // complexity, so we can't even test it properly. + return 0, 0, fmt.Errorf("tls: Ed25519 public keys are not supported before TLS 1.2") + // [UTLS SECTION BEGINS] + // Ported from cloudflare/go + case circlSign.PublicKey: + return 0, 0, fmt.Errorf("tls: circl public keys are not supported before TLS 1.2") + // [UTLS SECTION ENDS] + default: + return 0, 0, fmt.Errorf("tls: unsupported public key: %T", pub) + } +} + +var rsaSignatureSchemes = []struct { + scheme SignatureScheme + minModulusBytes int + maxVersion uint16 +}{ + // RSA-PSS is used with PSSSaltLengthEqualsHash, and requires + // emLen >= hLen + sLen + 2 + {PSSWithSHA256, crypto.SHA256.Size()*2 + 2, VersionTLS13}, + {PSSWithSHA384, crypto.SHA384.Size()*2 + 2, VersionTLS13}, + {PSSWithSHA512, crypto.SHA512.Size()*2 + 2, VersionTLS13}, + // PKCS #1 v1.5 uses prefixes from hashPrefixes in crypto/rsa, and requires + // emLen >= len(prefix) + hLen + 11 + // TLS 1.3 dropped support for PKCS #1 v1.5 in favor of RSA-PSS. + {PKCS1WithSHA256, 19 + crypto.SHA256.Size() + 11, VersionTLS12}, + {PKCS1WithSHA384, 19 + crypto.SHA384.Size() + 11, VersionTLS12}, + {PKCS1WithSHA512, 19 + crypto.SHA512.Size() + 11, VersionTLS12}, + {PKCS1WithSHA1, 15 + crypto.SHA1.Size() + 11, VersionTLS12}, +} + +// signatureSchemesForCertificate returns the list of supported SignatureSchemes +// for a given certificate, based on the public key and the protocol version, +// and optionally filtered by its explicit SupportedSignatureAlgorithms. +// +// This function must be kept in sync with supportedSignatureAlgorithms. +// FIPS filtering is applied in the caller, selectSignatureScheme. +func signatureSchemesForCertificate(version uint16, cert *Certificate) []SignatureScheme { + priv, ok := cert.PrivateKey.(crypto.Signer) + if !ok { + return nil + } + + var sigAlgs []SignatureScheme + switch pub := priv.Public().(type) { + case *ecdsa.PublicKey: + if version != VersionTLS13 { + // In TLS 1.2 and earlier, ECDSA algorithms are not + // constrained to a single curve. + sigAlgs = []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + ECDSAWithSHA1, + } + break + } + switch pub.Curve { + case elliptic.P256(): + sigAlgs = []SignatureScheme{ECDSAWithP256AndSHA256} + case elliptic.P384(): + sigAlgs = []SignatureScheme{ECDSAWithP384AndSHA384} + case elliptic.P521(): + sigAlgs = []SignatureScheme{ECDSAWithP521AndSHA512} + default: + return nil + } + case *rsa.PublicKey: + size := pub.Size() + sigAlgs = make([]SignatureScheme, 0, len(rsaSignatureSchemes)) + for _, candidate := range rsaSignatureSchemes { + if size >= candidate.minModulusBytes && version <= candidate.maxVersion { + sigAlgs = append(sigAlgs, candidate.scheme) + } + } + case ed25519.PublicKey: + sigAlgs = []SignatureScheme{Ed25519} + // [UTLS SECTION BEGINS] + // Ported from cloudflare/go + case circlSign.PublicKey: + scheme := pub.Scheme() + tlsScheme, ok := scheme.(circlPki.TLSScheme) + if !ok { + return nil + } + sigAlgs = []SignatureScheme{SignatureScheme(tlsScheme.TLSIdentifier())} + // [UTLS SECTION ENDS] + default: + return nil + } + + if cert.SupportedSignatureAlgorithms != nil { + var filteredSigAlgs []SignatureScheme + for _, sigAlg := range sigAlgs { + if isSupportedSignatureAlgorithm(sigAlg, cert.SupportedSignatureAlgorithms) { + filteredSigAlgs = append(filteredSigAlgs, sigAlg) + } + } + return filteredSigAlgs + } + return sigAlgs +} + +// selectSignatureScheme picks a SignatureScheme from the peer's preference list +// that works with the selected certificate. It's only called for protocol +// versions that support signature algorithms, so TLS 1.2 and 1.3. +func selectSignatureScheme(vers uint16, c *Certificate, peerAlgs []SignatureScheme) (SignatureScheme, error) { + supportedAlgs := signatureSchemesForCertificate(vers, c) + if len(supportedAlgs) == 0 { + return 0, unsupportedCertificateError(c) + } + if len(peerAlgs) == 0 && vers == VersionTLS12 { + // For TLS 1.2, if the client didn't send signature_algorithms then we + // can assume that it supports SHA1. See RFC 5246, Section 7.4.1.4.1. + peerAlgs = []SignatureScheme{PKCS1WithSHA1, ECDSAWithSHA1} + } + // Pick signature scheme in the peer's preference order, as our + // preference order is not configurable. + for _, preferredAlg := range peerAlgs { + // [uTLS] SECTION BEGIN + // if fips140tls.Required() && !isSupportedSignatureAlgorithm(preferredAlg, defaultSupportedSignatureAlgorithmsFIPS) { + // continue + // } + // [uTLS] SECTION END + if isSupportedSignatureAlgorithm(preferredAlg, supportedAlgs) { + return preferredAlg, nil + } + } + return 0, errors.New("tls: peer doesn't support any of the certificate's signature algorithms") +} + +// unsupportedCertificateError returns a helpful error for certificates with +// an unsupported private key. +func unsupportedCertificateError(cert *Certificate) error { + switch cert.PrivateKey.(type) { + case rsa.PrivateKey, ecdsa.PrivateKey: + return fmt.Errorf("tls: unsupported certificate: private key is %T, expected *%T", + cert.PrivateKey, cert.PrivateKey) + case *ed25519.PrivateKey: + return fmt.Errorf("tls: unsupported certificate: private key is *ed25519.PrivateKey, expected ed25519.PrivateKey") + } + + signer, ok := cert.PrivateKey.(crypto.Signer) + if !ok { + return fmt.Errorf("tls: certificate private key (%T) does not implement crypto.Signer", + cert.PrivateKey) + } + + switch pub := signer.Public().(type) { + case *ecdsa.PublicKey: + switch pub.Curve { + case elliptic.P256(): + case elliptic.P384(): + case elliptic.P521(): + default: + return fmt.Errorf("tls: unsupported certificate curve (%s)", pub.Curve.Params().Name) + } + case *rsa.PublicKey: + return fmt.Errorf("tls: certificate RSA key size too small for supported signature algorithms") + case ed25519.PublicKey: + default: + return fmt.Errorf("tls: unsupported certificate key (%T)", pub) + } + + if cert.SupportedSignatureAlgorithms != nil { + return fmt.Errorf("tls: peer doesn't support the certificate custom signature algorithms") + } + + return fmt.Errorf("tls: internal error: unsupported key (%T)", cert.PrivateKey) +} diff --git a/backend/vendor/github.com/refraction-networking/utls/cache.go b/backend/vendor/github.com/refraction-networking/utls/cache.go new file mode 100644 index 0000000..a767761 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/cache.go @@ -0,0 +1,95 @@ +// Copyright 2022 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto/x509" + "runtime" + "sync" + "sync/atomic" +) + +type cacheEntry struct { + refs atomic.Int64 + cert *x509.Certificate +} + +// certCache implements an intern table for reference counted x509.Certificates, +// implemented in a similar fashion to BoringSSL's CRYPTO_BUFFER_POOL. This +// allows for a single x509.Certificate to be kept in memory and referenced from +// multiple Conns. Returned references should not be mutated by callers. Certificates +// are still safe to use after they are removed from the cache. +// +// Certificates are returned wrapped in an activeCert struct that should be held by +// the caller. When references to the activeCert are freed, the number of references +// to the certificate in the cache is decremented. Once the number of references +// reaches zero, the entry is evicted from the cache. +// +// The main difference between this implementation and CRYPTO_BUFFER_POOL is that +// CRYPTO_BUFFER_POOL is a more generic structure which supports blobs of data, +// rather than specific structures. Since we only care about x509.Certificates, +// certCache is implemented as a specific cache, rather than a generic one. +// +// See https://boringssl.googlesource.com/boringssl/+/master/include/openssl/pool.h +// and https://boringssl.googlesource.com/boringssl/+/master/crypto/pool/pool.c +// for the BoringSSL reference. +type certCache struct { + sync.Map +} + +var globalCertCache = new(certCache) + +// activeCert is a handle to a certificate held in the cache. Once there are +// no alive activeCerts for a given certificate, the certificate is removed +// from the cache by a finalizer. +type activeCert struct { + cert *x509.Certificate +} + +// active increments the number of references to the entry, wraps the +// certificate in the entry in an activeCert, and sets the finalizer. +// +// Note that there is a race between active and the finalizer set on the +// returned activeCert, triggered if active is called after the ref count is +// decremented such that refs may be > 0 when evict is called. We consider this +// safe, since the caller holding an activeCert for an entry that is no longer +// in the cache is fine, with the only side effect being the memory overhead of +// there being more than one distinct reference to a certificate alive at once. +func (cc *certCache) active(e *cacheEntry) *activeCert { + e.refs.Add(1) + a := &activeCert{e.cert} + runtime.SetFinalizer(a, func(_ *activeCert) { + if e.refs.Add(-1) == 0 { + cc.evict(e) + } + }) + return a +} + +// evict removes a cacheEntry from the cache. +func (cc *certCache) evict(e *cacheEntry) { + cc.Delete(string(e.cert.Raw)) +} + +// newCert returns a x509.Certificate parsed from der. If there is already a copy +// of the certificate in the cache, a reference to the existing certificate will +// be returned. Otherwise, a fresh certificate will be added to the cache, and +// the reference returned. The returned reference should not be mutated. +func (cc *certCache) newCert(der []byte) (*activeCert, error) { + if entry, ok := cc.Load(string(der)); ok { + return cc.active(entry.(*cacheEntry)), nil + } + + cert, err := x509.ParseCertificate(der) + if err != nil { + return nil, err + } + + entry := &cacheEntry{cert: cert} + if entry, loaded := cc.LoadOrStore(string(der), entry); loaded { + return cc.active(entry.(*cacheEntry)), nil + } + return cc.active(entry), nil +} diff --git a/backend/vendor/github.com/refraction-networking/utls/cipher_suites.go b/backend/vendor/github.com/refraction-networking/utls/cipher_suites.go new file mode 100644 index 0000000..5e01f7e --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/cipher_suites.go @@ -0,0 +1,725 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto" + "crypto/aes" + "crypto/cipher" + "crypto/des" + "crypto/hmac" + "crypto/rc4" + "crypto/sha1" + "crypto/sha256" + "fmt" + "hash" + "runtime" + _ "unsafe" // for linkname + + "github.com/refraction-networking/utls/internal/boring" + "golang.org/x/sys/cpu" + + "golang.org/x/crypto/chacha20poly1305" +) + +// CipherSuite is a TLS cipher suite. Note that most functions in this package +// accept and expose cipher suite IDs instead of this type. +type CipherSuite struct { + ID uint16 + Name string + + // Supported versions is the list of TLS protocol versions that can + // negotiate this cipher suite. + SupportedVersions []uint16 + + // Insecure is true if the cipher suite has known security issues + // due to its primitives, design, or implementation. + Insecure bool +} + +var ( + supportedUpToTLS12 = []uint16{VersionTLS10, VersionTLS11, VersionTLS12} + supportedOnlyTLS12 = []uint16{VersionTLS12} + supportedOnlyTLS13 = []uint16{VersionTLS13} +) + +// CipherSuites returns a list of cipher suites currently implemented by this +// package, excluding those with security issues, which are returned by +// [InsecureCipherSuites]. +// +// The list is sorted by ID. Note that the default cipher suites selected by +// this package might depend on logic that can't be captured by a static list, +// and might not match those returned by this function. +func CipherSuites() []*CipherSuite { + return []*CipherSuite{ + {TLS_AES_128_GCM_SHA256, "TLS_AES_128_GCM_SHA256", supportedOnlyTLS13, false}, + {TLS_AES_256_GCM_SHA384, "TLS_AES_256_GCM_SHA384", supportedOnlyTLS13, false}, + {TLS_CHACHA20_POLY1305_SHA256, "TLS_CHACHA20_POLY1305_SHA256", supportedOnlyTLS13, false}, + + {TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA", supportedUpToTLS12, false}, + {TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA", supportedUpToTLS12, false}, + {TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA", supportedUpToTLS12, false}, + {TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA", supportedUpToTLS12, false}, + {TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256", supportedOnlyTLS12, false}, + {TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384", supportedOnlyTLS12, false}, + {TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256", supportedOnlyTLS12, false}, + {TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384", supportedOnlyTLS12, false}, + {TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256", supportedOnlyTLS12, false}, + {TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256", supportedOnlyTLS12, false}, + } +} + +// InsecureCipherSuites returns a list of cipher suites currently implemented by +// this package and which have security issues. +// +// Most applications should not use the cipher suites in this list, and should +// only use those returned by [CipherSuites]. +func InsecureCipherSuites() []*CipherSuite { + // This list includes RC4, CBC_SHA256, and 3DES cipher suites. See + // cipherSuitesPreferenceOrder for details. + return []*CipherSuite{ + {TLS_RSA_WITH_RC4_128_SHA, "TLS_RSA_WITH_RC4_128_SHA", supportedUpToTLS12, true}, + {TLS_RSA_WITH_3DES_EDE_CBC_SHA, "TLS_RSA_WITH_3DES_EDE_CBC_SHA", supportedUpToTLS12, true}, + {TLS_RSA_WITH_AES_128_CBC_SHA, "TLS_RSA_WITH_AES_128_CBC_SHA", supportedUpToTLS12, true}, + {TLS_RSA_WITH_AES_256_CBC_SHA, "TLS_RSA_WITH_AES_256_CBC_SHA", supportedUpToTLS12, true}, + {TLS_RSA_WITH_AES_128_CBC_SHA256, "TLS_RSA_WITH_AES_128_CBC_SHA256", supportedOnlyTLS12, true}, + {TLS_RSA_WITH_AES_128_GCM_SHA256, "TLS_RSA_WITH_AES_128_GCM_SHA256", supportedOnlyTLS12, true}, + {TLS_RSA_WITH_AES_256_GCM_SHA384, "TLS_RSA_WITH_AES_256_GCM_SHA384", supportedOnlyTLS12, true}, + {TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, "TLS_ECDHE_ECDSA_WITH_RC4_128_SHA", supportedUpToTLS12, true}, + {TLS_ECDHE_RSA_WITH_RC4_128_SHA, "TLS_ECDHE_RSA_WITH_RC4_128_SHA", supportedUpToTLS12, true}, + {TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA", supportedUpToTLS12, true}, + {TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256", supportedOnlyTLS12, true}, + {TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256", supportedOnlyTLS12, true}, + } +} + +// CipherSuiteName returns the standard name for the passed cipher suite ID +// (e.g. "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256"), or a fallback representation +// of the ID value if the cipher suite is not implemented by this package. +func CipherSuiteName(id uint16) string { + for _, c := range CipherSuites() { + if c.ID == id { + return c.Name + } + } + for _, c := range InsecureCipherSuites() { + if c.ID == id { + return c.Name + } + } + return fmt.Sprintf("0x%04X", id) +} + +const ( + // suiteECDHE indicates that the cipher suite involves elliptic curve + // Diffie-Hellman. This means that it should only be selected when the + // client indicates that it supports ECC with a curve and point format + // that we're happy with. + suiteECDHE = 1 << iota + // suiteECSign indicates that the cipher suite involves an ECDSA or + // EdDSA signature and therefore may only be selected when the server's + // certificate is ECDSA or EdDSA. If this is not set then the cipher suite + // is RSA based. + suiteECSign + // suiteTLS12 indicates that the cipher suite should only be advertised + // and accepted when using TLS 1.2. + suiteTLS12 + // suiteSHA384 indicates that the cipher suite uses SHA384 as the + // handshake hash. + suiteSHA384 +) + +// A cipherSuite is a TLS 1.0–1.2 cipher suite, and defines the key exchange +// mechanism, as well as the cipher+MAC pair or the AEAD. +type cipherSuite struct { + id uint16 + // the lengths, in bytes, of the key material needed for each component. + keyLen int + macLen int + ivLen int + ka func(version uint16) keyAgreement + // flags is a bitmask of the suite* values, above. + flags int + cipher func(key, iv []byte, isRead bool) any + mac func(key []byte) hash.Hash + aead func(key, fixedNonce []byte) aead +} + +var cipherSuites = []*cipherSuite{ // TODO: replace with a map, since the order doesn't matter. + {TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, 32, 0, 12, ecdheRSAKA, suiteECDHE | suiteTLS12, nil, nil, aeadChaCha20Poly1305}, + {TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, 32, 0, 12, ecdheECDSAKA, suiteECDHE | suiteECSign | suiteTLS12, nil, nil, aeadChaCha20Poly1305}, + {TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, 16, 0, 4, ecdheRSAKA, suiteECDHE | suiteTLS12, nil, nil, aeadAESGCM}, + {TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 16, 0, 4, ecdheECDSAKA, suiteECDHE | suiteECSign | suiteTLS12, nil, nil, aeadAESGCM}, + {TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, 32, 0, 4, ecdheRSAKA, suiteECDHE | suiteTLS12 | suiteSHA384, nil, nil, aeadAESGCM}, + {TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, 32, 0, 4, ecdheECDSAKA, suiteECDHE | suiteECSign | suiteTLS12 | suiteSHA384, nil, nil, aeadAESGCM}, + {TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, 16, 32, 16, ecdheRSAKA, suiteECDHE | suiteTLS12, cipherAES, macSHA256, nil}, + {TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, 16, 20, 16, ecdheRSAKA, suiteECDHE, cipherAES, macSHA1, nil}, + {TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, 16, 32, 16, ecdheECDSAKA, suiteECDHE | suiteECSign | suiteTLS12, cipherAES, macSHA256, nil}, + {TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, 16, 20, 16, ecdheECDSAKA, suiteECDHE | suiteECSign, cipherAES, macSHA1, nil}, + {TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, 32, 20, 16, ecdheRSAKA, suiteECDHE, cipherAES, macSHA1, nil}, + {TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, 32, 20, 16, ecdheECDSAKA, suiteECDHE | suiteECSign, cipherAES, macSHA1, nil}, + {TLS_RSA_WITH_AES_128_GCM_SHA256, 16, 0, 4, rsaKA, suiteTLS12, nil, nil, aeadAESGCM}, + {TLS_RSA_WITH_AES_256_GCM_SHA384, 32, 0, 4, rsaKA, suiteTLS12 | suiteSHA384, nil, nil, aeadAESGCM}, + {TLS_RSA_WITH_AES_128_CBC_SHA256, 16, 32, 16, rsaKA, suiteTLS12, cipherAES, macSHA256, nil}, + {TLS_RSA_WITH_AES_128_CBC_SHA, 16, 20, 16, rsaKA, 0, cipherAES, macSHA1, nil}, + {TLS_RSA_WITH_AES_256_CBC_SHA, 32, 20, 16, rsaKA, 0, cipherAES, macSHA1, nil}, + {TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, 24, 20, 8, ecdheRSAKA, suiteECDHE, cipher3DES, macSHA1, nil}, + {TLS_RSA_WITH_3DES_EDE_CBC_SHA, 24, 20, 8, rsaKA, 0, cipher3DES, macSHA1, nil}, + {TLS_RSA_WITH_RC4_128_SHA, 16, 20, 0, rsaKA, 0, cipherRC4, macSHA1, nil}, + {TLS_ECDHE_RSA_WITH_RC4_128_SHA, 16, 20, 0, ecdheRSAKA, suiteECDHE, cipherRC4, macSHA1, nil}, + {TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, 16, 20, 0, ecdheECDSAKA, suiteECDHE | suiteECSign, cipherRC4, macSHA1, nil}, +} + +// selectCipherSuite returns the first TLS 1.0–1.2 cipher suite from ids which +// is also in supportedIDs and passes the ok filter. +func selectCipherSuite(ids, supportedIDs []uint16, ok func(*cipherSuite) bool) *cipherSuite { + for _, id := range ids { + candidate := cipherSuiteByID(id) + if candidate == nil || !ok(candidate) { + continue + } + + for _, suppID := range supportedIDs { + if id == suppID { + return candidate + } + } + } + return nil +} + +// A cipherSuiteTLS13 defines only the pair of the AEAD algorithm and hash +// algorithm to be used with HKDF. See RFC 8446, Appendix B.4. +type cipherSuiteTLS13 struct { + id uint16 + keyLen int + aead func(key, fixedNonce []byte) aead + hash crypto.Hash +} + +// cipherSuitesTLS13 should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/quic-go/quic-go +// - github.com/sagernet/quic-go +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname cipherSuitesTLS13 +var cipherSuitesTLS13 = []*cipherSuiteTLS13{ // TODO: replace with a map. + {TLS_AES_128_GCM_SHA256, 16, aeadAESGCMTLS13, crypto.SHA256}, + {TLS_CHACHA20_POLY1305_SHA256, 32, aeadChaCha20Poly1305, crypto.SHA256}, + {TLS_AES_256_GCM_SHA384, 32, aeadAESGCMTLS13, crypto.SHA384}, +} + +// cipherSuitesPreferenceOrder is the order in which we'll select (on the +// server) or advertise (on the client) TLS 1.0–1.2 cipher suites. +// +// Cipher suites are filtered but not reordered based on the application and +// peer's preferences, meaning we'll never select a suite lower in this list if +// any higher one is available. This makes it more defensible to keep weaker +// cipher suites enabled, especially on the server side where we get the last +// word, since there are no known downgrade attacks on cipher suites selection. +// +// The list is sorted by applying the following priority rules, stopping at the +// first (most important) applicable one: +// +// - Anything else comes before RC4 +// +// RC4 has practically exploitable biases. See https://www.rc4nomore.com. +// +// - Anything else comes before CBC_SHA256 +// +// SHA-256 variants of the CBC ciphersuites don't implement any Lucky13 +// countermeasures. See https://www.isg.rhul.ac.uk/tls/Lucky13.html and +// https://www.imperialviolet.org/2013/02/04/luckythirteen.html. +// +// - Anything else comes before 3DES +// +// 3DES has 64-bit blocks, which makes it fundamentally susceptible to +// birthday attacks. See https://sweet32.info. +// +// - ECDHE comes before anything else +// +// Once we got the broken stuff out of the way, the most important +// property a cipher suite can have is forward secrecy. We don't +// implement FFDHE, so that means ECDHE. +// +// - AEADs come before CBC ciphers +// +// Even with Lucky13 countermeasures, MAC-then-Encrypt CBC cipher suites +// are fundamentally fragile, and suffered from an endless sequence of +// padding oracle attacks. See https://eprint.iacr.org/2015/1129, +// https://www.imperialviolet.org/2014/12/08/poodleagain.html, and +// https://blog.cloudflare.com/yet-another-padding-oracle-in-openssl-cbc-ciphersuites/. +// +// - AES comes before ChaCha20 +// +// When AES hardware is available, AES-128-GCM and AES-256-GCM are faster +// than ChaCha20Poly1305. +// +// When AES hardware is not available, AES-128-GCM is one or more of: much +// slower, way more complex, and less safe (because not constant time) +// than ChaCha20Poly1305. +// +// We use this list if we think both peers have AES hardware, and +// cipherSuitesPreferenceOrderNoAES otherwise. +// +// - AES-128 comes before AES-256 +// +// The only potential advantages of AES-256 are better multi-target +// margins, and hypothetical post-quantum properties. Neither apply to +// TLS, and AES-256 is slower due to its four extra rounds (which don't +// contribute to the advantages above). +// +// - ECDSA comes before RSA +// +// The relative order of ECDSA and RSA cipher suites doesn't matter, +// as they depend on the certificate. Pick one to get a stable order. +var cipherSuitesPreferenceOrder = []uint16{ + // AEADs w/ ECDHE + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + + // CBC w/ ECDHE + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + + // AEADs w/o ECDHE + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + + // CBC w/o ECDHE + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + + // 3DES + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + + // CBC_SHA256 + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + TLS_RSA_WITH_AES_128_CBC_SHA256, + + // RC4 + TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, TLS_ECDHE_RSA_WITH_RC4_128_SHA, + TLS_RSA_WITH_RC4_128_SHA, +} + +var cipherSuitesPreferenceOrderNoAES = []uint16{ + // ChaCha20Poly1305 + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + + // AES-GCM w/ ECDHE + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + + // The rest of cipherSuitesPreferenceOrder. + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + TLS_RSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, TLS_ECDHE_RSA_WITH_RC4_128_SHA, + TLS_RSA_WITH_RC4_128_SHA, +} + +// disabledCipherSuites are not used unless explicitly listed in Config.CipherSuites. +var disabledCipherSuites = map[uint16]bool{ + // CBC_SHA256 + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256: true, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256: true, + TLS_RSA_WITH_AES_128_CBC_SHA256: true, + + // RC4 + TLS_ECDHE_ECDSA_WITH_RC4_128_SHA: true, + TLS_ECDHE_RSA_WITH_RC4_128_SHA: true, + TLS_RSA_WITH_RC4_128_SHA: true, +} + +// rsaKexCiphers contains the ciphers which use RSA based key exchange, +// which we also disable by default unless a GODEBUG is set. +var rsaKexCiphers = map[uint16]bool{ + TLS_RSA_WITH_RC4_128_SHA: true, + TLS_RSA_WITH_3DES_EDE_CBC_SHA: true, + TLS_RSA_WITH_AES_128_CBC_SHA: true, + TLS_RSA_WITH_AES_256_CBC_SHA: true, + TLS_RSA_WITH_AES_128_CBC_SHA256: true, + TLS_RSA_WITH_AES_128_GCM_SHA256: true, + TLS_RSA_WITH_AES_256_GCM_SHA384: true, +} + +// tdesCiphers contains 3DES ciphers, +// which we also disable by default unless a GODEBUG is set. +var tdesCiphers = map[uint16]bool{ + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA: true, + TLS_RSA_WITH_3DES_EDE_CBC_SHA: true, +} + +var ( + // Keep in sync with crypto/internal/fips140/aes/gcm.supportsAESGCM. + hasGCMAsmAMD64 = cpu.X86.HasAES && cpu.X86.HasPCLMULQDQ && cpu.X86.HasSSE41 && cpu.X86.HasSSSE3 + hasGCMAsmARM64 = cpu.ARM64.HasAES && cpu.ARM64.HasPMULL + hasGCMAsmS390X = cpu.S390X.HasAES && cpu.S390X.HasAESCTR && cpu.S390X.HasGHASH + hasGCMAsmPPC64 = runtime.GOARCH == "ppc64" || runtime.GOARCH == "ppc64le" + + hasAESGCMHardwareSupport = hasGCMAsmAMD64 || hasGCMAsmARM64 || hasGCMAsmS390X || hasGCMAsmPPC64 +) + +var aesgcmCiphers = map[uint16]bool{ + // TLS 1.2 + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256: true, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384: true, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256: true, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384: true, + // TLS 1.3 + TLS_AES_128_GCM_SHA256: true, + TLS_AES_256_GCM_SHA384: true, +} + +// aesgcmPreferred returns whether the first known cipher in the preference list +// is an AES-GCM cipher, implying the peer has hardware support for it. +func aesgcmPreferred(ciphers []uint16) bool { + for _, cID := range ciphers { + if c := cipherSuiteByID(cID); c != nil { + return aesgcmCiphers[cID] + } + if c := cipherSuiteTLS13ByID(cID); c != nil { + return aesgcmCiphers[cID] + } + } + return false +} + +func cipherRC4(key, iv []byte, isRead bool) any { + cipher, _ := rc4.NewCipher(key) + return cipher +} + +func cipher3DES(key, iv []byte, isRead bool) any { + block, _ := des.NewTripleDESCipher(key) + if isRead { + return cipher.NewCBCDecrypter(block, iv) + } + return cipher.NewCBCEncrypter(block, iv) +} + +func cipherAES(key, iv []byte, isRead bool) any { + block, _ := aes.NewCipher(key) + if isRead { + return cipher.NewCBCDecrypter(block, iv) + } + return cipher.NewCBCEncrypter(block, iv) +} + +// macSHA1 returns a SHA-1 based constant time MAC. +func macSHA1(key []byte) hash.Hash { + h := sha1.New + // The BoringCrypto SHA1 does not have a constant-time + // checksum function, so don't try to use it. + if !boring.Enabled { + h = newConstantTimeHash(h) + } + return hmac.New(h, key) +} + +// macSHA256 returns a SHA-256 based MAC. This is only supported in TLS 1.2 and +// is currently only used in disabled-by-default cipher suites. +func macSHA256(key []byte) hash.Hash { + return hmac.New(sha256.New, key) +} + +type aead interface { + cipher.AEAD + + // explicitNonceLen returns the number of bytes of explicit nonce + // included in each record. This is eight for older AEADs and + // zero for modern ones. + explicitNonceLen() int +} + +const ( + aeadNonceLength = 12 + noncePrefixLength = 4 +) + +// prefixNonceAEAD wraps an AEAD and prefixes a fixed portion of the nonce to +// each call. +type prefixNonceAEAD struct { + // nonce contains the fixed part of the nonce in the first four bytes. + nonce [aeadNonceLength]byte + aead cipher.AEAD +} + +func (f *prefixNonceAEAD) NonceSize() int { return aeadNonceLength - noncePrefixLength } +func (f *prefixNonceAEAD) Overhead() int { return f.aead.Overhead() } +func (f *prefixNonceAEAD) explicitNonceLen() int { return f.NonceSize() } + +func (f *prefixNonceAEAD) Seal(out, nonce, plaintext, additionalData []byte) []byte { + copy(f.nonce[4:], nonce) + return f.aead.Seal(out, f.nonce[:], plaintext, additionalData) +} + +func (f *prefixNonceAEAD) Open(out, nonce, ciphertext, additionalData []byte) ([]byte, error) { + copy(f.nonce[4:], nonce) + return f.aead.Open(out, f.nonce[:], ciphertext, additionalData) +} + +// xorNonceAEAD wraps an AEAD by XORing in a fixed pattern to the nonce +// before each call. +type xorNonceAEAD struct { + nonceMask [aeadNonceLength]byte + aead cipher.AEAD +} + +func (f *xorNonceAEAD) NonceSize() int { return 8 } // 64-bit sequence number +func (f *xorNonceAEAD) Overhead() int { return f.aead.Overhead() } +func (f *xorNonceAEAD) explicitNonceLen() int { return 0 } + +func (f *xorNonceAEAD) Seal(out, nonce, plaintext, additionalData []byte) []byte { + for i, b := range nonce { + f.nonceMask[4+i] ^= b + } + result := f.aead.Seal(out, f.nonceMask[:], plaintext, additionalData) + for i, b := range nonce { + f.nonceMask[4+i] ^= b + } + + return result +} + +func (f *xorNonceAEAD) Open(out, nonce, ciphertext, additionalData []byte) ([]byte, error) { + for i, b := range nonce { + f.nonceMask[4+i] ^= b + } + result, err := f.aead.Open(out, f.nonceMask[:], ciphertext, additionalData) + for i, b := range nonce { + f.nonceMask[4+i] ^= b + } + + return result, err +} + +func aeadAESGCM(key, noncePrefix []byte) aead { + if len(noncePrefix) != noncePrefixLength { + panic("tls: internal error: wrong nonce length") + } + aes, err := aes.NewCipher(key) + if err != nil { + panic(err) + } + var aead cipher.AEAD + if boring.Enabled { + aead, err = boring.NewGCMTLS(aes) + } else { + boring.Unreachable() + // [uTLS] SECTION BEGIN + // aead, err = gcm.NewGCMForTLS12(aes.(*fipsaes.Block)) + aead, err = cipher.NewGCM(aes) + // [uTLS] SECTION END + } + if err != nil { + panic(err) + } + + ret := &prefixNonceAEAD{aead: aead} + copy(ret.nonce[:], noncePrefix) + return ret +} + +// aeadAESGCMTLS13 should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/xtls/xray-core +// - github.com/v2fly/v2ray-core +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname aeadAESGCMTLS13 +func aeadAESGCMTLS13(key, nonceMask []byte) aead { + if len(nonceMask) != aeadNonceLength { + panic("tls: internal error: wrong nonce length") + } + aes, err := aes.NewCipher(key) + if err != nil { + panic(err) + } + var aead cipher.AEAD + if boring.Enabled { + aead, err = boring.NewGCMTLS13(aes) + } else { + boring.Unreachable() + // [uTLS] SECTION BEGIN + // aead, err = gcm.NewGCMForTLS13(aes.(*fipsaes.Block)) + aead, err = cipher.NewGCM(aes) + // [uTLS] SECTION END + } + if err != nil { + panic(err) + } + + ret := &xorNonceAEAD{aead: aead} + copy(ret.nonceMask[:], nonceMask) + return ret +} + +func aeadChaCha20Poly1305(key, nonceMask []byte) aead { + if len(nonceMask) != aeadNonceLength { + panic("tls: internal error: wrong nonce length") + } + aead, err := chacha20poly1305.New(key) + if err != nil { + panic(err) + } + + ret := &xorNonceAEAD{aead: aead} + copy(ret.nonceMask[:], nonceMask) + return ret +} + +type constantTimeHash interface { + hash.Hash + ConstantTimeSum(b []byte) []byte +} + +// cthWrapper wraps any hash.Hash that implements ConstantTimeSum, and replaces +// with that all calls to Sum. It's used to obtain a ConstantTimeSum-based HMAC. +type cthWrapper struct { + h constantTimeHash +} + +func (c *cthWrapper) Size() int { return c.h.Size() } +func (c *cthWrapper) BlockSize() int { return c.h.BlockSize() } +func (c *cthWrapper) Reset() { c.h.Reset() } +func (c *cthWrapper) Write(p []byte) (int, error) { return c.h.Write(p) } +func (c *cthWrapper) Sum(b []byte) []byte { return c.h.ConstantTimeSum(b) } + +func newConstantTimeHash(h func() hash.Hash) func() hash.Hash { + boring.Unreachable() + return func() hash.Hash { + return &cthWrapper{h().(constantTimeHash)} + } +} + +// tls10MAC implements the TLS 1.0 MAC function. RFC 2246, Section 6.2.3. +func tls10MAC(h hash.Hash, out, seq, header, data, extra []byte) []byte { + h.Reset() + h.Write(seq) + h.Write(header) + h.Write(data) + res := h.Sum(out) + if extra != nil { + h.Write(extra) + } + return res +} + +func rsaKA(version uint16) keyAgreement { + return rsaKeyAgreement{} +} + +func ecdheECDSAKA(version uint16) keyAgreement { + return &ecdheKeyAgreement{ + isRSA: false, + version: version, + } +} + +func ecdheRSAKA(version uint16) keyAgreement { + return &ecdheKeyAgreement{ + isRSA: true, + version: version, + } +} + +// mutualCipherSuite returns a cipherSuite given a list of supported +// ciphersuites and the id requested by the peer. +func mutualCipherSuite(have []uint16, want uint16) *cipherSuite { + for _, id := range have { + if id == want { + return cipherSuiteByID(id) + } + } + return nil +} + +func cipherSuiteByID(id uint16) *cipherSuite { + for _, cipherSuite := range utlsSupportedCipherSuites { + if cipherSuite.id == id { + return cipherSuite + } + } + return nil +} + +func mutualCipherSuiteTLS13(have []uint16, want uint16) *cipherSuiteTLS13 { + for _, id := range have { + if id == want { + return cipherSuiteTLS13ByID(id) + } + } + return nil +} + +func cipherSuiteTLS13ByID(id uint16) *cipherSuiteTLS13 { + for _, cipherSuite := range cipherSuitesTLS13 { + if cipherSuite.id == id { + return cipherSuite + } + } + return nil +} + +// A list of cipher suite IDs that are, or have been, implemented by this +// package. +// +// See https://www.iana.org/assignments/tls-parameters/tls-parameters.xml +const ( + // TLS 1.0 - 1.2 cipher suites. + TLS_RSA_WITH_RC4_128_SHA uint16 = 0x0005 + TLS_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x000a + TLS_RSA_WITH_AES_128_CBC_SHA uint16 = 0x002f + TLS_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0035 + TLS_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x003c + TLS_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x009c + TLS_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x009d + TLS_ECDHE_ECDSA_WITH_RC4_128_SHA uint16 = 0xc007 + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA uint16 = 0xc009 + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA uint16 = 0xc00a + TLS_ECDHE_RSA_WITH_RC4_128_SHA uint16 = 0xc011 + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xc012 + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA uint16 = 0xc013 + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA uint16 = 0xc014 + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 uint16 = 0xc023 + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0xc027 + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0xc02f + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 uint16 = 0xc02b + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0xc030 + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 uint16 = 0xc02c + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xcca8 + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xcca9 + + // TLS 1.3 cipher suites. + TLS_AES_128_GCM_SHA256 uint16 = 0x1301 + TLS_AES_256_GCM_SHA384 uint16 = 0x1302 + TLS_CHACHA20_POLY1305_SHA256 uint16 = 0x1303 + + // TLS_FALLBACK_SCSV isn't a standard cipher suite but an indicator + // that the client is doing version fallback. See RFC 7507. + TLS_FALLBACK_SCSV uint16 = 0x5600 + + // Legacy names for the corresponding cipher suites with the correct _SHA256 + // suffix, retained for backward compatibility. + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305 = TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305 = TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 +) diff --git a/backend/vendor/github.com/refraction-networking/utls/common.go b/backend/vendor/github.com/refraction-networking/utls/common.go new file mode 100644 index 0000000..fea76bd --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/common.go @@ -0,0 +1,1836 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bytes" + "container/list" + "context" + "crypto" + "crypto/ecdsa" + "crypto/ed25519" + "crypto/elliptic" + "crypto/rand" + "crypto/rsa" + "crypto/sha512" + "crypto/x509" + "errors" + "fmt" + "io" + "net" + "slices" + "strings" + "sync" + "time" + _ "unsafe" // for linkname + + "github.com/refraction-networking/utls/internal/fips140tls" +) + +const ( + VersionTLS10 = 0x0301 + VersionTLS11 = 0x0302 + VersionTLS12 = 0x0303 + VersionTLS13 = 0x0304 + + // Deprecated: SSLv3 is cryptographically broken, and is no longer + // supported by this package. See golang.org/issue/32716. + VersionSSL30 = 0x0300 +) + +// VersionName returns the name for the provided TLS version number +// (e.g. "TLS 1.3"), or a fallback representation of the value if the +// version is not implemented by this package. +func VersionName(version uint16) string { + switch version { + case VersionSSL30: + return "SSLv3" + case VersionTLS10: + return "TLS 1.0" + case VersionTLS11: + return "TLS 1.1" + case VersionTLS12: + return "TLS 1.2" + case VersionTLS13: + return "TLS 1.3" + default: + return fmt.Sprintf("0x%04X", version) + } +} + +const ( + maxPlaintext = 16384 // maximum plaintext payload length + maxCiphertext = 16384 + 2048 // maximum ciphertext payload length + maxCiphertextTLS13 = 16384 + 256 // maximum ciphertext length in TLS 1.3 + recordHeaderLen = 5 // record header length + maxHandshake = 65536 // maximum handshake we support (protocol max is 16 MB) + maxHandshakeCertificateMsg = 262144 // maximum certificate message size (256 KiB) + maxUselessRecords = 32 // maximum number of consecutive non-advancing records +) + +// TLS record types. +type recordType uint8 + +const ( + recordTypeChangeCipherSpec recordType = 20 + recordTypeAlert recordType = 21 + recordTypeHandshake recordType = 22 + recordTypeApplicationData recordType = 23 +) + +// TLS handshake message types. +const ( + typeHelloRequest uint8 = 0 + typeClientHello uint8 = 1 + typeServerHello uint8 = 2 + typeNewSessionTicket uint8 = 4 + typeEndOfEarlyData uint8 = 5 + typeEncryptedExtensions uint8 = 8 + typeCertificate uint8 = 11 + typeServerKeyExchange uint8 = 12 + typeCertificateRequest uint8 = 13 + typeServerHelloDone uint8 = 14 + typeCertificateVerify uint8 = 15 + typeClientKeyExchange uint8 = 16 + typeFinished uint8 = 20 + typeCertificateStatus uint8 = 22 + typeKeyUpdate uint8 = 24 + typeMessageHash uint8 = 254 // synthetic message +) + +// TLS compression types. +const ( + compressionNone uint8 = 0 +) + +// TLS extension numbers +const ( + extensionServerName uint16 = 0 + extensionStatusRequest uint16 = 5 + extensionSupportedCurves uint16 = 10 // supported_groups in TLS 1.3, see RFC 8446, Section 4.2.7 + extensionSupportedPoints uint16 = 11 + extensionSignatureAlgorithms uint16 = 13 + extensionALPN uint16 = 16 + extensionStatusRequestV2 uint16 = 17 + extensionSCT uint16 = 18 + extensionExtendedMasterSecret uint16 = 23 + extensionDelegatedCredentials uint16 = 34 + extensionSessionTicket uint16 = 35 + extensionPreSharedKey uint16 = 41 + extensionEarlyData uint16 = 42 + extensionSupportedVersions uint16 = 43 + extensionCookie uint16 = 44 + extensionPSKModes uint16 = 45 + extensionCertificateAuthorities uint16 = 47 + extensionSignatureAlgorithmsCert uint16 = 50 + extensionKeyShare uint16 = 51 + extensionQUICTransportParameters uint16 = 57 + extensionRenegotiationInfo uint16 = 0xff01 + extensionECHOuterExtensions uint16 = 0xfd00 + extensionEncryptedClientHello uint16 = 0xfe0d +) + +// TLS signaling cipher suite values +const ( + scsvRenegotiation uint16 = 0x00ff +) + +// CurveID is the type of a TLS identifier for a key exchange mechanism. See +// https://www.iana.org/assignments/tls-parameters/tls-parameters.xml#tls-parameters-8. +// +// In TLS 1.2, this registry used to support only elliptic curves. In TLS 1.3, +// it was extended to other groups and renamed NamedGroup. See RFC 8446, Section +// 4.2.7. It was then also extended to other mechanisms, such as hybrid +// post-quantum KEMs. +type CurveID uint16 + +const ( + CurveP256 CurveID = 23 + CurveP384 CurveID = 24 + CurveP521 CurveID = 25 + X25519 CurveID = 29 + X25519MLKEM768 CurveID = 4588 +) + +func isTLS13OnlyKeyExchange(curve CurveID) bool { + return curve == X25519MLKEM768 +} + +func isPQKeyExchange(curve CurveID) bool { + return curve == X25519MLKEM768 +} + +// TLS 1.3 Key Share. See RFC 8446, Section 4.2.8. +type keyShare struct { + group CurveID + data []byte +} + +// TLS 1.3 PSK Key Exchange Modes. See RFC 8446, Section 4.2.9. +const ( + pskModePlain uint8 = 0 + pskModeDHE uint8 = 1 +) + +// TLS 1.3 PSK Identity. Can be a Session Ticket, or a reference to a saved +// session. See RFC 8446, Section 4.2.11. +type pskIdentity struct { + label []byte + obfuscatedTicketAge uint32 +} + +// TLS Elliptic Curve Point Formats +// https://www.iana.org/assignments/tls-parameters/tls-parameters.xml#tls-parameters-9 +const ( + pointFormatUncompressed uint8 = 0 +) + +// TLS CertificateStatusType (RFC 3546) +const ( + statusTypeOCSP uint8 = 1 + statusV2TypeOCSP uint8 = 2 +) + +// Certificate types (for certificateRequestMsg) +const ( + certTypeRSASign = 1 + certTypeECDSASign = 64 // ECDSA or EdDSA keys, see RFC 8422, Section 3. +) + +// Signature algorithms (for internal signaling use). Starting at 225 to avoid overlap with +// TLS 1.2 codepoints (RFC 5246, Appendix A.4.1), with which these have nothing to do. +const ( + signaturePKCS1v15 uint8 = iota + 225 + signatureRSAPSS + signatureECDSA + signatureEd25519 + signatureEdDilithium3 +) + +// directSigning is a standard Hash value that signals that no pre-hashing +// should be performed, and that the input should be signed directly. It is the +// hash function associated with the Ed25519 signature scheme. +var directSigning crypto.Hash = 0 + +// helloRetryRequestRandom is set as the Random value of a ServerHello +// to signal that the message is actually a HelloRetryRequest. +var helloRetryRequestRandom = []byte{ // See RFC 8446, Section 4.1.3. + 0xCF, 0x21, 0xAD, 0x74, 0xE5, 0x9A, 0x61, 0x11, + 0xBE, 0x1D, 0x8C, 0x02, 0x1E, 0x65, 0xB8, 0x91, + 0xC2, 0xA2, 0x11, 0x16, 0x7A, 0xBB, 0x8C, 0x5E, + 0x07, 0x9E, 0x09, 0xE2, 0xC8, 0xA8, 0x33, 0x9C, +} + +const ( + // downgradeCanaryTLS12 or downgradeCanaryTLS11 is embedded in the server + // random as a downgrade protection if the server would be capable of + // negotiating a higher version. See RFC 8446, Section 4.1.3. + downgradeCanaryTLS12 = "DOWNGRD\x01" + downgradeCanaryTLS11 = "DOWNGRD\x00" +) + +// testingOnlyForceDowngradeCanary is set in tests to force the server side to +// include downgrade canaries even if it's using its highers supported version. +var testingOnlyForceDowngradeCanary bool + +// ConnectionState records basic TLS details about the connection. +type ConnectionState struct { + // Version is the TLS version used by the connection (e.g. VersionTLS12). + Version uint16 + + // HandshakeComplete is true if the handshake has concluded. + HandshakeComplete bool + + // DidResume is true if this connection was successfully resumed from a + // previous session with a session ticket or similar mechanism. + DidResume bool + + // CipherSuite is the cipher suite negotiated for the connection (e.g. + // TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_AES_128_GCM_SHA256). + CipherSuite uint16 + + // NegotiatedProtocol is the application protocol negotiated with ALPN. + NegotiatedProtocol string + + // NegotiatedProtocolIsMutual used to indicate a mutual NPN negotiation. + // + // Deprecated: this value is always true. + NegotiatedProtocolIsMutual bool + + // PeerApplicationSettings is the Application-Layer Protocol Settings (ALPS) + // provided by peer. + PeerApplicationSettings []byte // [uTLS] + + // ServerName is the value of the Server Name Indication extension sent by + // the client. It's available both on the server and on the client side. + ServerName string + + // PeerCertificates are the parsed certificates sent by the peer, in the + // order in which they were sent. The first element is the leaf certificate + // that the connection is verified against. + // + // On the client side, it can't be empty. On the server side, it can be + // empty if Config.ClientAuth is not RequireAnyClientCert or + // RequireAndVerifyClientCert. + // + // PeerCertificates and its contents should not be modified. + PeerCertificates []*x509.Certificate + + // VerifiedChains is a list of one or more chains where the first element is + // PeerCertificates[0] and the last element is from Config.RootCAs (on the + // client side) or Config.ClientCAs (on the server side). + // + // On the client side, it's set if Config.InsecureSkipVerify is false. On + // the server side, it's set if Config.ClientAuth is VerifyClientCertIfGiven + // (and the peer provided a certificate) or RequireAndVerifyClientCert. + // + // VerifiedChains and its contents should not be modified. + VerifiedChains [][]*x509.Certificate + + // SignedCertificateTimestamps is a list of SCTs provided by the peer + // through the TLS handshake for the leaf certificate, if any. + SignedCertificateTimestamps [][]byte + + // OCSPResponse is a stapled Online Certificate Status Protocol (OCSP) + // response provided by the peer for the leaf certificate, if any. + OCSPResponse []byte + + // TLSUnique contains the "tls-unique" channel binding value (see RFC 5929, + // Section 3). This value will be nil for TLS 1.3 connections and for + // resumed connections that don't support Extended Master Secret (RFC 7627). + TLSUnique []byte + + // ECHAccepted indicates if Encrypted Client Hello was offered by the client + // and accepted by the server. Currently, ECH is supported only on the + // client side. + ECHAccepted bool + + // ekm is a closure exposed via ExportKeyingMaterial. + ekm func(label string, context []byte, length int) ([]byte, error) + + // testingOnlyDidHRR is true if a HelloRetryRequest was sent/received. + testingOnlyDidHRR bool + + // testingOnlyCurveID is the selected CurveID, or zero if an RSA exchanges + // is performed. + testingOnlyCurveID CurveID + + // ECHRetryConfigs contains the ECH retry configurations sent by the server in + // EncryptedExtensions message. It is only populated if the server sent the + // ech extension in EncryptedExtensions message. + ECHRetryConfigs []ECHConfig // [uTLS] +} + +// ExportKeyingMaterial returns length bytes of exported key material in a new +// slice as defined in RFC 5705. If context is nil, it is not used as part of +// the seed. If the connection was set to allow renegotiation via +// Config.Renegotiation, or if the connections supports neither TLS 1.3 nor +// Extended Master Secret, this function will return an error. +// +// Exporting key material without Extended Master Secret or TLS 1.3 was disabled +// in Go 1.22 due to security issues (see the Security Considerations sections +// of RFC 5705 and RFC 7627), but can be re-enabled with the GODEBUG setting +// tlsunsafeekm=1. +func (cs *ConnectionState) ExportKeyingMaterial(label string, context []byte, length int) ([]byte, error) { + return cs.ekm(label, context, length) +} + +// ClientAuthType declares the policy the server will follow for +// TLS Client Authentication. +type ClientAuthType int + +const ( + // NoClientCert indicates that no client certificate should be requested + // during the handshake, and if any certificates are sent they will not + // be verified. + NoClientCert ClientAuthType = iota + // RequestClientCert indicates that a client certificate should be requested + // during the handshake, but does not require that the client send any + // certificates. + RequestClientCert + // RequireAnyClientCert indicates that a client certificate should be requested + // during the handshake, and that at least one certificate is required to be + // sent by the client, but that certificate is not required to be valid. + RequireAnyClientCert + // VerifyClientCertIfGiven indicates that a client certificate should be requested + // during the handshake, but does not require that the client sends a + // certificate. If the client does send a certificate it is required to be + // valid. + VerifyClientCertIfGiven + // RequireAndVerifyClientCert indicates that a client certificate should be requested + // during the handshake, and that at least one valid certificate is required + // to be sent by the client. + RequireAndVerifyClientCert +) + +// requiresClientCert reports whether the ClientAuthType requires a client +// certificate to be provided. +func requiresClientCert(c ClientAuthType) bool { + switch c { + case RequireAnyClientCert, RequireAndVerifyClientCert: + return true + default: + return false + } +} + +// ClientSessionCache is a cache of ClientSessionState objects that can be used +// by a client to resume a TLS session with a given server. ClientSessionCache +// implementations should expect to be called concurrently from different +// goroutines. Up to TLS 1.2, only ticket-based resumption is supported, not +// SessionID-based resumption. In TLS 1.3 they were merged into PSK modes, which +// are supported via this interface. +type ClientSessionCache interface { + // Get searches for a ClientSessionState associated with the given key. + // On return, ok is true if one was found. + Get(sessionKey string) (session *ClientSessionState, ok bool) + + // Put adds the ClientSessionState to the cache with the given key. It might + // get called multiple times in a connection if a TLS 1.3 server provides + // more than one session ticket. If called with a nil *ClientSessionState, + // it should remove the cache entry. + Put(sessionKey string, cs *ClientSessionState) +} + +//go:generate stringer -linecomment -type=SignatureScheme,CurveID,ClientAuthType -output=common_string.go + +// SignatureScheme identifies a signature algorithm supported by TLS. See +// RFC 8446, Section 4.2.3. +type SignatureScheme uint16 + +const ( + // RSASSA-PKCS1-v1_5 algorithms. + PKCS1WithSHA256 SignatureScheme = 0x0401 + PKCS1WithSHA384 SignatureScheme = 0x0501 + PKCS1WithSHA512 SignatureScheme = 0x0601 + + // RSASSA-PSS algorithms with public key OID rsaEncryption. + PSSWithSHA256 SignatureScheme = 0x0804 + PSSWithSHA384 SignatureScheme = 0x0805 + PSSWithSHA512 SignatureScheme = 0x0806 + + // ECDSA algorithms. Only constrained to a specific curve in TLS 1.3. + ECDSAWithP256AndSHA256 SignatureScheme = 0x0403 + ECDSAWithP384AndSHA384 SignatureScheme = 0x0503 + ECDSAWithP521AndSHA512 SignatureScheme = 0x0603 + + // EdDSA algorithms. + Ed25519 SignatureScheme = 0x0807 + + // Legacy signature and hash algorithms for TLS 1.2. + PKCS1WithSHA1 SignatureScheme = 0x0201 + ECDSAWithSHA1 SignatureScheme = 0x0203 +) + +// ClientHelloInfo contains information from a ClientHello message in order to +// guide application logic in the GetCertificate and GetConfigForClient callbacks. +type ClientHelloInfo struct { + // CipherSuites lists the CipherSuites supported by the client (e.g. + // TLS_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256). + CipherSuites []uint16 + + // ServerName indicates the name of the server requested by the client + // in order to support virtual hosting. ServerName is only set if the + // client is using SNI (see RFC 4366, Section 3.1). + ServerName string + + // SupportedCurves lists the key exchange mechanisms supported by the + // client. It was renamed to "supported groups" in TLS 1.3, see RFC 8446, + // Section 4.2.7 and [CurveID]. + // + // SupportedCurves may be nil in TLS 1.2 and lower if the Supported Elliptic + // Curves Extension is not being used (see RFC 4492, Section 5.1.1). + SupportedCurves []CurveID + + // SupportedPoints lists the point formats supported by the client. + // SupportedPoints is set only if the Supported Point Formats Extension + // is being used (see RFC 4492, Section 5.1.2). + SupportedPoints []uint8 + + // SignatureSchemes lists the signature and hash schemes that the client + // is willing to verify. SignatureSchemes is set only if the Signature + // Algorithms Extension is being used (see RFC 5246, Section 7.4.1.4.1). + SignatureSchemes []SignatureScheme + + // SupportedProtos lists the application protocols supported by the client. + // SupportedProtos is set only if the Application-Layer Protocol + // Negotiation Extension is being used (see RFC 7301, Section 3.1). + // + // Servers can select a protocol by setting Config.NextProtos in a + // GetConfigForClient return value. + SupportedProtos []string + + // SupportedVersions lists the TLS versions supported by the client. + // For TLS versions less than 1.3, this is extrapolated from the max + // version advertised by the client, so values other than the greatest + // might be rejected if used. + SupportedVersions []uint16 + + // Extensions lists the IDs of the extensions presented by the client + // in the ClientHello. + Extensions []uint16 + + // Conn is the underlying net.Conn for the connection. Do not read + // from, or write to, this connection; that will cause the TLS + // connection to fail. + Conn net.Conn + + // config is embedded by the GetCertificate or GetConfigForClient caller, + // for use with SupportsCertificate. + config *Config + + // ctx is the context of the handshake that is in progress. + ctx context.Context +} + +// Context returns the context of the handshake that is in progress. +// This context is a child of the context passed to HandshakeContext, +// if any, and is canceled when the handshake concludes. +func (c *ClientHelloInfo) Context() context.Context { + return c.ctx +} + +// CertificateRequestInfo contains information from a server's +// CertificateRequest message, which is used to demand a certificate and proof +// of control from a client. +type CertificateRequestInfo struct { + // AcceptableCAs contains zero or more, DER-encoded, X.501 + // Distinguished Names. These are the names of root or intermediate CAs + // that the server wishes the returned certificate to be signed by. An + // empty slice indicates that the server has no preference. + AcceptableCAs [][]byte + + // SignatureSchemes lists the signature schemes that the server is + // willing to verify. + SignatureSchemes []SignatureScheme + + // Version is the TLS version that was negotiated for this connection. + Version uint16 + + // ctx is the context of the handshake that is in progress. + ctx context.Context +} + +// Context returns the context of the handshake that is in progress. +// This context is a child of the context passed to HandshakeContext, +// if any, and is canceled when the handshake concludes. +func (c *CertificateRequestInfo) Context() context.Context { + return c.ctx +} + +// RenegotiationSupport enumerates the different levels of support for TLS +// renegotiation. TLS renegotiation is the act of performing subsequent +// handshakes on a connection after the first. This significantly complicates +// the state machine and has been the source of numerous, subtle security +// issues. Initiating a renegotiation is not supported, but support for +// accepting renegotiation requests may be enabled. +// +// Even when enabled, the server may not change its identity between handshakes +// (i.e. the leaf certificate must be the same). Additionally, concurrent +// handshake and application data flow is not permitted so renegotiation can +// only be used with protocols that synchronise with the renegotiation, such as +// HTTPS. +// +// Renegotiation is not defined in TLS 1.3. +type RenegotiationSupport int + +const ( + // RenegotiateNever disables renegotiation. + RenegotiateNever RenegotiationSupport = iota + + // RenegotiateOnceAsClient allows a remote server to request + // renegotiation once per connection. + RenegotiateOnceAsClient + + // RenegotiateFreelyAsClient allows a remote server to repeatedly + // request renegotiation. + RenegotiateFreelyAsClient +) + +// A Config structure is used to configure a TLS client or server. +// After one has been passed to a TLS function it must not be +// modified. A Config may be reused; the tls package will also not +// modify it. +type Config struct { + // Rand provides the source of entropy for nonces and RSA blinding. + // If Rand is nil, TLS uses the cryptographic random reader in package + // crypto/rand. + // The Reader must be safe for use by multiple goroutines. + Rand io.Reader + + // Time returns the current time as the number of seconds since the epoch. + // If Time is nil, TLS uses time.Now. + Time func() time.Time + + // Certificates contains one or more certificate chains to present to the + // other side of the connection. The first certificate compatible with the + // peer's requirements is selected automatically. + // + // Server configurations must set one of Certificates, GetCertificate or + // GetConfigForClient. Clients doing client-authentication may set either + // Certificates or GetClientCertificate. + // + // Note: if there are multiple Certificates, and they don't have the + // optional field Leaf set, certificate selection will incur a significant + // per-handshake performance cost. + Certificates []Certificate + + // NameToCertificate maps from a certificate name to an element of + // Certificates. Note that a certificate name can be of the form + // '*.example.com' and so doesn't have to be a domain name as such. + // + // Deprecated: NameToCertificate only allows associating a single + // certificate with a given name. Leave this field nil to let the library + // select the first compatible chain from Certificates. + NameToCertificate map[string]*Certificate + + // GetCertificate returns a Certificate based on the given + // ClientHelloInfo. It will only be called if the client supplies SNI + // information or if Certificates is empty. + // + // If GetCertificate is nil or returns nil, then the certificate is + // retrieved from NameToCertificate. If NameToCertificate is nil, the + // best element of Certificates will be used. + // + // Once a Certificate is returned it should not be modified. + GetCertificate func(*ClientHelloInfo) (*Certificate, error) + + // GetClientCertificate, if not nil, is called when a server requests a + // certificate from a client. If set, the contents of Certificates will + // be ignored. + // + // If GetClientCertificate returns an error, the handshake will be + // aborted and that error will be returned. Otherwise + // GetClientCertificate must return a non-nil Certificate. If + // Certificate.Certificate is empty then no certificate will be sent to + // the server. If this is unacceptable to the server then it may abort + // the handshake. + // + // GetClientCertificate may be called multiple times for the same + // connection if renegotiation occurs or if TLS 1.3 is in use. + // + // Once a Certificate is returned it should not be modified. + GetClientCertificate func(*CertificateRequestInfo) (*Certificate, error) + + // GetConfigForClient, if not nil, is called after a ClientHello is + // received from a client. It may return a non-nil Config in order to + // change the Config that will be used to handle this connection. If + // the returned Config is nil, the original Config will be used. The + // Config returned by this callback may not be subsequently modified. + // + // If GetConfigForClient is nil, the Config passed to Server() will be + // used for all connections. + // + // If SessionTicketKey was explicitly set on the returned Config, or if + // SetSessionTicketKeys was called on the returned Config, those keys will + // be used. Otherwise, the original Config keys will be used (and possibly + // rotated if they are automatically managed). + GetConfigForClient func(*ClientHelloInfo) (*Config, error) + + // VerifyPeerCertificate, if not nil, is called after normal + // certificate verification by either a TLS client or server. It + // receives the raw ASN.1 certificates provided by the peer and also + // any verified chains that normal processing found. If it returns a + // non-nil error, the handshake is aborted and that error results. + // + // If normal verification fails then the handshake will abort before + // considering this callback. If normal verification is disabled (on the + // client when InsecureSkipVerify is set, or on a server when ClientAuth is + // RequestClientCert or RequireAnyClientCert), then this callback will be + // considered but the verifiedChains argument will always be nil. When + // ClientAuth is NoClientCert, this callback is not called on the server. + // rawCerts may be empty on the server if ClientAuth is RequestClientCert or + // VerifyClientCertIfGiven. + // + // This callback is not invoked on resumed connections, as certificates are + // not re-verified on resumption. + // + // verifiedChains and its contents should not be modified. + VerifyPeerCertificate func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error + + // VerifyConnection, if not nil, is called after normal certificate + // verification and after VerifyPeerCertificate by either a TLS client + // or server. If it returns a non-nil error, the handshake is aborted + // and that error results. + // + // If normal verification fails then the handshake will abort before + // considering this callback. This callback will run for all connections, + // including resumptions, regardless of InsecureSkipVerify or ClientAuth + // settings. + VerifyConnection func(ConnectionState) error + + // RootCAs defines the set of root certificate authorities + // that clients use when verifying server certificates. + // If RootCAs is nil, TLS uses the host's root CA set. + RootCAs *x509.CertPool + + // NextProtos is a list of supported application level protocols, in + // order of preference. If both peers support ALPN, the selected + // protocol will be one from this list, and the connection will fail + // if there is no mutually supported protocol. If NextProtos is empty + // or the peer doesn't support ALPN, the connection will succeed and + // ConnectionState.NegotiatedProtocol will be empty. + NextProtos []string + + // ApplicationSettings is a set of application settings (ALPS) to use + // with each application protocol (ALPN). + ApplicationSettings map[string][]byte // [uTLS] + + // ServerName is used to verify the hostname on the returned + // certificates unless InsecureSkipVerify is given. It is also included + // in the client's handshake to support virtual hosting unless it is + // an IP address. + ServerName string + + // ClientAuth determines the server's policy for + // TLS Client Authentication. The default is NoClientCert. + ClientAuth ClientAuthType + + // ClientCAs defines the set of root certificate authorities + // that servers use if required to verify a client certificate + // by the policy in ClientAuth. + ClientCAs *x509.CertPool + + // InsecureSkipVerify controls whether a client verifies the server's + // certificate chain and host name. If InsecureSkipVerify is true, crypto/tls + // accepts any certificate presented by the server and any host name in that + // certificate. In this mode, TLS is susceptible to machine-in-the-middle + // attacks unless custom verification is used. This should be used only for + // testing or in combination with VerifyConnection or VerifyPeerCertificate. + InsecureSkipVerify bool + + // InsecureSkipTimeVerify controls whether a client verifies the server's + // certificate chain against time. If InsecureSkipTimeVerify is true, + // crypto/tls accepts the certificate even when it is expired. + // + // This field is ignored when InsecureSkipVerify is true. + InsecureSkipTimeVerify bool // [uTLS] + + // OmitEmptyPsk determines whether utls will automatically conceal + // the psk extension when it is empty. When the psk extension is empty, the + // browser omits it from the client hello. Utls can mimic this behavior, + // but it deviates from the provided client hello specification, rendering + // it unsuitable as the default behavior. Users have the option to enable + // this behavior at their own discretion. + OmitEmptyPsk bool // [uTLS] + + // InsecureServerNameToVerify is used to verify the hostname on the returned + // certificates. It is intended to use with spoofed ServerName. + // If InsecureServerNameToVerify is "*", crypto/tls will do normal + // certificate validation but ignore certifacate's DNSName. + // + // This field is ignored when InsecureSkipVerify is true. + InsecureServerNameToVerify string // [uTLS] + + // PreferSkipResumptionOnNilExtension controls the behavior when session resumption is enabled but the corresponding session extensions are nil. + // + // To successfully use session resumption, ensure that the following requirements are met: + // - SessionTicketsDisabled is set to false + // - ClientSessionCache is non-nil + // - For TLS 1.2, SessionTicketExtension is non-nil + // - For TLS 1.3, PreSharedKeyExtension is non-nil + // + // There may be cases where users enable session resumption (SessionTicketsDisabled: false && ClientSessionCache: non-nil), but they do not provide SessionTicketExtension or PreSharedKeyExtension in the ClientHelloSpec. This could be intentional or accidental. + // + // By default, utls throws an exception in such scenarios. Set this to true to skip the resumption and suppress the exception. + PreferSkipResumptionOnNilExtension bool // [uTLS] + + // CipherSuites is a list of enabled TLS 1.0–1.2 cipher suites. The order of + // the list is ignored. Note that TLS 1.3 ciphersuites are not configurable. + // + // If CipherSuites is nil, a safe default list is used. The default cipher + // suites might change over time. In Go 1.22 RSA key exchange based cipher + // suites were removed from the default list, but can be re-added with the + // GODEBUG setting tlsrsakex=1. In Go 1.23 3DES cipher suites were removed + // from the default list, but can be re-added with the GODEBUG setting + // tls3des=1. + CipherSuites []uint16 + + // PreferServerCipherSuites is a legacy field and has no effect. + // + // It used to control whether the server would follow the client's or the + // server's preference. Servers now select the best mutually supported + // cipher suite based on logic that takes into account inferred client + // hardware, server hardware, and security. + // + // Deprecated: PreferServerCipherSuites is ignored. + PreferServerCipherSuites bool + + // SessionTicketsDisabled may be set to true to disable session ticket and + // PSK (resumption) support. Note that on clients, session ticket support is + // also disabled if ClientSessionCache is nil. + SessionTicketsDisabled bool + + // SessionTicketKey is used by TLS servers to provide session resumption. + // See RFC 5077 and the PSK mode of RFC 8446. If zero, it will be filled + // with random data before the first server handshake. + // + // Deprecated: if this field is left at zero, session ticket keys will be + // automatically rotated every day and dropped after seven days. For + // customizing the rotation schedule or synchronizing servers that are + // terminating connections for the same host, use SetSessionTicketKeys. + SessionTicketKey [32]byte + + // ClientSessionCache is a cache of ClientSessionState entries for TLS + // session resumption. It is only used by clients. + ClientSessionCache ClientSessionCache + + // UnwrapSession is called on the server to turn a ticket/identity + // previously produced by [WrapSession] into a usable session. + // + // UnwrapSession will usually either decrypt a session state in the ticket + // (for example with [Config.EncryptTicket]), or use the ticket as a handle + // to recover a previously stored state. It must use [ParseSessionState] to + // deserialize the session state. + // + // If UnwrapSession returns an error, the connection is terminated. If it + // returns (nil, nil), the session is ignored. crypto/tls may still choose + // not to resume the returned session. + UnwrapSession func(identity []byte, cs ConnectionState) (*SessionState, error) + + // WrapSession is called on the server to produce a session ticket/identity. + // + // WrapSession must serialize the session state with [SessionState.Bytes]. + // It may then encrypt the serialized state (for example with + // [Config.DecryptTicket]) and use it as the ticket, or store the state and + // return a handle for it. + // + // If WrapSession returns an error, the connection is terminated. + // + // Warning: the return value will be exposed on the wire and to clients in + // plaintext. The application is in charge of encrypting and authenticating + // it (and rotating keys) or returning high-entropy identifiers. Failing to + // do so correctly can compromise current, previous, and future connections + // depending on the protocol version. + WrapSession func(ConnectionState, *SessionState) ([]byte, error) + + // MinVersion contains the minimum TLS version that is acceptable. + // + // By default, TLS 1.2 is currently used as the minimum. TLS 1.0 is the + // minimum supported by this package. + // + // The server-side default can be reverted to TLS 1.0 by including the value + // "tls10server=1" in the GODEBUG environment variable. + MinVersion uint16 + + // MaxVersion contains the maximum TLS version that is acceptable. + // + // By default, the maximum version supported by this package is used, + // which is currently TLS 1.3. + MaxVersion uint16 + + // CurvePreferences contains a set of supported key exchange mechanisms. + // The name refers to elliptic curves for legacy reasons, see [CurveID]. + // The order of the list is ignored, and key exchange mechanisms are chosen + // from this list using an internal preference order. If empty, the default + // will be used. + // + // From Go 1.24, the default includes the [X25519MLKEM768] hybrid + // post-quantum key exchange. To disable it, set CurvePreferences explicitly + // or use the GODEBUG=tlsmlkem=0 environment variable. + CurvePreferences []CurveID + + // PQSignatureSchemesEnabled controls whether additional post-quantum + // signature schemes are supported for peer certificates. For available + // signature schemes, see tls_cf.go. + PQSignatureSchemesEnabled bool // [UTLS] ported from cloudflare/go + + // DynamicRecordSizingDisabled disables adaptive sizing of TLS records. + // When true, the largest possible TLS record size is always used. When + // false, the size of TLS records may be adjusted in an attempt to + // improve latency. + DynamicRecordSizingDisabled bool + + // Renegotiation controls what types of renegotiation are supported. + // The default, none, is correct for the vast majority of applications. + Renegotiation RenegotiationSupport + + // KeyLogWriter optionally specifies a destination for TLS master secrets + // in NSS key log format that can be used to allow external programs + // such as Wireshark to decrypt TLS connections. + // See https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/Key_Log_Format. + // Use of KeyLogWriter compromises security and should only be + // used for debugging. + KeyLogWriter io.Writer + + // EncryptedClientHelloConfigList is a serialized ECHConfigList. If + // provided, clients will attempt to connect to servers using Encrypted + // Client Hello (ECH) using one of the provided ECHConfigs. + // + // Servers do not use this field. In order to configure ECH for servers, see + // the EncryptedClientHelloKeys field. + // + // If the list contains no valid ECH configs, the handshake will fail + // and return an error. + // + // If EncryptedClientHelloConfigList is set, MinVersion, if set, must + // be VersionTLS13. + // + // When EncryptedClientHelloConfigList is set, the handshake will only + // succeed if ECH is successfully negotiated. If the server rejects ECH, + // an ECHRejectionError error will be returned, which may contain a new + // ECHConfigList that the server suggests using. + // + // How this field is parsed may change in future Go versions, if the + // encoding described in the final Encrypted Client Hello RFC changes. + EncryptedClientHelloConfigList []byte + + // EncryptedClientHelloRejectionVerify, if not nil, is called when ECH is + // rejected by the remote server, in order to verify the ECH provider + // certificate in the outer ClientHello. If it returns a non-nil error, the + // handshake is aborted and that error results. + // + // On the server side this field is not used. + // + // Unlike VerifyPeerCertificate and VerifyConnection, normal certificate + // verification will not be performed before calling + // EncryptedClientHelloRejectionVerify. + // + // If EncryptedClientHelloRejectionVerify is nil and ECH is rejected, the + // roots in RootCAs will be used to verify the ECH providers public + // certificate. VerifyPeerCertificate and VerifyConnection are not called + // when ECH is rejected, even if set, and InsecureSkipVerify is ignored. + EncryptedClientHelloRejectionVerify func(ConnectionState) error + + // EncryptedClientHelloKeys are the ECH keys to use when a client + // attempts ECH. + // + // If EncryptedClientHelloKeys is set, MinVersion, if set, must be + // VersionTLS13. + // + // If a client attempts ECH, but it is rejected by the server, the server + // will send a list of configs to retry based on the set of + // EncryptedClientHelloKeys which have the SendAsRetry field set. + // + // On the client side, this field is ignored. In order to configure ECH for + // clients, see the EncryptedClientHelloConfigList field. + EncryptedClientHelloKeys []EncryptedClientHelloKey + + // mutex protects sessionTicketKeys and autoSessionTicketKeys. + mutex sync.RWMutex + // sessionTicketKeys contains zero or more ticket keys. If set, it means + // the keys were set with SessionTicketKey or SetSessionTicketKeys. The + // first key is used for new tickets and any subsequent keys can be used to + // decrypt old tickets. The slice contents are not protected by the mutex + // and are immutable. + sessionTicketKeys []ticketKey + // autoSessionTicketKeys is like sessionTicketKeys but is owned by the + // auto-rotation logic. See Config.ticketKeys. + autoSessionTicketKeys []ticketKey + + // ECHConfigs contains the ECH configurations to be used by the ECH + // extension if any. + // It could either be distributed by the server in EncryptedExtensions + // message or out-of-band. + // + // If ECHConfigs is nil and an ECH extension is present, GREASEd ECH + // extension will be sent. + // + // If GREASE ECH extension is present, this field will be ignored. + ECHConfigs []ECHConfig // [uTLS] +} + +// EncryptedClientHelloKey holds a private key that is associated +// with a specific ECH config known to a client. +type EncryptedClientHelloKey struct { + // Config should be a marshalled ECHConfig associated with PrivateKey. This + // must match the config provided to clients byte-for-byte. The config + // should only specify the DHKEM(X25519, HKDF-SHA256) KEM ID (0x0020), the + // HKDF-SHA256 KDF ID (0x0001), and a subset of the following AEAD IDs: + // AES-128-GCM (0x0000), AES-256-GCM (0x0001), ChaCha20Poly1305 (0x0002). + Config []byte + // PrivateKey should be a marshalled private key. Currently, we expect + // this to be the output of [ecdh.PrivateKey.Bytes]. + PrivateKey []byte + // SendAsRetry indicates if Config should be sent as part of the list of + // retry configs when ECH is requested by the client but rejected by the + // server. + SendAsRetry bool +} + +const ( + // ticketKeyLifetime is how long a ticket key remains valid and can be used to + // resume a client connection. + ticketKeyLifetime = 7 * 24 * time.Hour // 7 days + + // ticketKeyRotation is how often the server should rotate the session ticket key + // that is used for new tickets. + ticketKeyRotation = 24 * time.Hour +) + +// ticketKey is the internal representation of a session ticket key. +type ticketKey struct { + aesKey [16]byte + hmacKey [16]byte + // created is the time at which this ticket key was created. See Config.ticketKeys. + created time.Time +} + +// ticketKeyFromBytes converts from the external representation of a session +// ticket key to a ticketKey. Externally, session ticket keys are 32 random +// bytes and this function expands that into sufficient name and key material. +func (c *Config) ticketKeyFromBytes(b [32]byte) (key ticketKey) { + hashed := sha512.Sum512(b[:]) + // The first 16 bytes of the hash used to be exposed on the wire as a ticket + // prefix. They MUST NOT be used as a secret. In the future, it would make + // sense to use a proper KDF here, like HKDF with a fixed salt. + const legacyTicketKeyNameLen = 16 + copy(key.aesKey[:], hashed[legacyTicketKeyNameLen:]) + copy(key.hmacKey[:], hashed[legacyTicketKeyNameLen+len(key.aesKey):]) + key.created = c.time() + return key +} + +// maxSessionTicketLifetime is the maximum allowed lifetime of a TLS 1.3 session +// ticket, and the lifetime we set for all tickets we send. +const maxSessionTicketLifetime = 7 * 24 * time.Hour + +// Clone returns a shallow clone of c or nil if c is nil. It is safe to clone a [Config] that is +// being used concurrently by a TLS client or server. +func (c *Config) Clone() *Config { + if c == nil { + return nil + } + c.mutex.RLock() + defer c.mutex.RUnlock() + return &Config{ + Rand: c.Rand, + Time: c.Time, + Certificates: c.Certificates, + NameToCertificate: c.NameToCertificate, + GetCertificate: c.GetCertificate, + GetClientCertificate: c.GetClientCertificate, + GetConfigForClient: c.GetConfigForClient, + VerifyPeerCertificate: c.VerifyPeerCertificate, + VerifyConnection: c.VerifyConnection, + RootCAs: c.RootCAs, + NextProtos: c.NextProtos, + ApplicationSettings: c.ApplicationSettings, + ServerName: c.ServerName, + ClientAuth: c.ClientAuth, + ClientCAs: c.ClientCAs, + InsecureSkipVerify: c.InsecureSkipVerify, + InsecureSkipTimeVerify: c.InsecureSkipTimeVerify, + InsecureServerNameToVerify: c.InsecureServerNameToVerify, + OmitEmptyPsk: c.OmitEmptyPsk, + CipherSuites: c.CipherSuites, + PreferServerCipherSuites: c.PreferServerCipherSuites, + SessionTicketsDisabled: c.SessionTicketsDisabled, + SessionTicketKey: c.SessionTicketKey, + ClientSessionCache: c.ClientSessionCache, + UnwrapSession: c.UnwrapSession, + WrapSession: c.WrapSession, + MinVersion: c.MinVersion, + MaxVersion: c.MaxVersion, + CurvePreferences: c.CurvePreferences, + PQSignatureSchemesEnabled: c.PQSignatureSchemesEnabled, // [UTLS] + DynamicRecordSizingDisabled: c.DynamicRecordSizingDisabled, + Renegotiation: c.Renegotiation, + KeyLogWriter: c.KeyLogWriter, + EncryptedClientHelloConfigList: c.EncryptedClientHelloConfigList, + EncryptedClientHelloRejectionVerify: c.EncryptedClientHelloRejectionVerify, + EncryptedClientHelloKeys: c.EncryptedClientHelloKeys, + sessionTicketKeys: c.sessionTicketKeys, + autoSessionTicketKeys: c.autoSessionTicketKeys, + + PreferSkipResumptionOnNilExtension: c.PreferSkipResumptionOnNilExtension, // [UTLS] + ECHConfigs: c.ECHConfigs, // [uTLS] + } +} + +// deprecatedSessionTicketKey is set as the prefix of SessionTicketKey if it was +// randomized for backwards compatibility but is not in use. +var deprecatedSessionTicketKey = []byte("DEPRECATED") + +// initLegacySessionTicketKeyRLocked ensures the legacy SessionTicketKey field is +// randomized if empty, and that sessionTicketKeys is populated from it otherwise. +func (c *Config) initLegacySessionTicketKeyRLocked() { + // Don't write if SessionTicketKey is already defined as our deprecated string, + // or if it is defined by the user but sessionTicketKeys is already set. + if c.SessionTicketKey != [32]byte{} && + (bytes.HasPrefix(c.SessionTicketKey[:], deprecatedSessionTicketKey) || len(c.sessionTicketKeys) > 0) { + return + } + + // We need to write some data, so get an exclusive lock and re-check any conditions. + c.mutex.RUnlock() + defer c.mutex.RLock() + c.mutex.Lock() + defer c.mutex.Unlock() + if c.SessionTicketKey == [32]byte{} { + if _, err := io.ReadFull(c.rand(), c.SessionTicketKey[:]); err != nil { + panic(fmt.Sprintf("tls: unable to generate random session ticket key: %v", err)) + } + // Write the deprecated prefix at the beginning so we know we created + // it. This key with the DEPRECATED prefix isn't used as an actual + // session ticket key, and is only randomized in case the application + // reuses it for some reason. + copy(c.SessionTicketKey[:], deprecatedSessionTicketKey) + } else if !bytes.HasPrefix(c.SessionTicketKey[:], deprecatedSessionTicketKey) && len(c.sessionTicketKeys) == 0 { + c.sessionTicketKeys = []ticketKey{c.ticketKeyFromBytes(c.SessionTicketKey)} + } + +} + +// ticketKeys returns the ticketKeys for this connection. +// If configForClient has explicitly set keys, those will +// be returned. Otherwise, the keys on c will be used and +// may be rotated if auto-managed. +// During rotation, any expired session ticket keys are deleted from +// c.sessionTicketKeys. If the session ticket key that is currently +// encrypting tickets (ie. the first ticketKey in c.sessionTicketKeys) +// is not fresh, then a new session ticket key will be +// created and prepended to c.sessionTicketKeys. +func (c *Config) ticketKeys(configForClient *Config) []ticketKey { + // If the ConfigForClient callback returned a Config with explicitly set + // keys, use those, otherwise just use the original Config. + if configForClient != nil { + configForClient.mutex.RLock() + if configForClient.SessionTicketsDisabled { + return nil + } + configForClient.initLegacySessionTicketKeyRLocked() + if len(configForClient.sessionTicketKeys) != 0 { + ret := configForClient.sessionTicketKeys + configForClient.mutex.RUnlock() + return ret + } + configForClient.mutex.RUnlock() + } + + c.mutex.RLock() + defer c.mutex.RUnlock() + if c.SessionTicketsDisabled { + return nil + } + c.initLegacySessionTicketKeyRLocked() + if len(c.sessionTicketKeys) != 0 { + return c.sessionTicketKeys + } + // Fast path for the common case where the key is fresh enough. + if len(c.autoSessionTicketKeys) > 0 && c.time().Sub(c.autoSessionTicketKeys[0].created) < ticketKeyRotation { + return c.autoSessionTicketKeys + } + + // autoSessionTicketKeys are managed by auto-rotation. + c.mutex.RUnlock() + defer c.mutex.RLock() + c.mutex.Lock() + defer c.mutex.Unlock() + // Re-check the condition in case it changed since obtaining the new lock. + if len(c.autoSessionTicketKeys) == 0 || c.time().Sub(c.autoSessionTicketKeys[0].created) >= ticketKeyRotation { + var newKey [32]byte + if _, err := io.ReadFull(c.rand(), newKey[:]); err != nil { + panic(fmt.Sprintf("unable to generate random session ticket key: %v", err)) + } + valid := make([]ticketKey, 0, len(c.autoSessionTicketKeys)+1) + valid = append(valid, c.ticketKeyFromBytes(newKey)) + for _, k := range c.autoSessionTicketKeys { + // While rotating the current key, also remove any expired ones. + if c.time().Sub(k.created) < ticketKeyLifetime { + valid = append(valid, k) + } + } + c.autoSessionTicketKeys = valid + } + return c.autoSessionTicketKeys +} + +// SetSessionTicketKeys updates the session ticket keys for a server. +// +// The first key will be used when creating new tickets, while all keys can be +// used for decrypting tickets. It is safe to call this function while the +// server is running in order to rotate the session ticket keys. The function +// will panic if keys is empty. +// +// Calling this function will turn off automatic session ticket key rotation. +// +// If multiple servers are terminating connections for the same host they should +// all have the same session ticket keys. If the session ticket keys leaks, +// previously recorded and future TLS connections using those keys might be +// compromised. +func (c *Config) SetSessionTicketKeys(keys [][32]byte) { + if len(keys) == 0 { + panic("tls: keys must have at least one key") + } + + newKeys := make([]ticketKey, len(keys)) + for i, bytes := range keys { + newKeys[i] = c.ticketKeyFromBytes(bytes) + } + + c.mutex.Lock() + c.sessionTicketKeys = newKeys + c.mutex.Unlock() +} + +func (c *Config) rand() io.Reader { + r := c.Rand + if r == nil { + return rand.Reader + } + return r +} + +func (c *Config) time() time.Time { + t := c.Time + if t == nil { + t = time.Now + } + return t() +} + +func (c *Config) cipherSuites() []uint16 { + if c.CipherSuites == nil { + // [uTLS] SECTION BEGIN + // if fips140tls.Required() { + // return defaultCipherSuitesFIPS + // } + // [uTLS] SECTION END + return defaultCipherSuites() + } + // [uTLS] SECTION BEGIN + // if fips140tls.Required() { + // cipherSuites := slices.Clone(c.CipherSuites) + // return slices.DeleteFunc(cipherSuites, func(id uint16) bool { + // return !slices.Contains(defaultCipherSuitesFIPS, id) + // }) + // } + // [uTLS] SECTION END + return c.CipherSuites +} + +var supportedVersions = []uint16{ + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, +} + +// roleClient and roleServer are meant to call supportedVersions and parents +// with more readability at the callsite. +const roleClient = true +const roleServer = false + +// var tls10server = godebug.New("tls10server") // [UTLS] unsupported + +func (c *Config) supportedVersions(isClient bool) []uint16 { + versions := make([]uint16, 0, len(supportedVersions)) + for _, v := range supportedVersions { + // [uTLS] SECTION BEGIN + // if fips140tls.Required() && !slices.Contains(defaultSupportedVersionsFIPS, v) { + // continue + // } + // [uTLS] SECTION END + if (c == nil || c.MinVersion == 0) && v < VersionTLS12 { + // [uTLS SECTION BEGIN] + // Disable unsupported godebug package + // if isClient || tls10server.Value() != "1" { + // continue + // } + if isClient { + continue + } + // [uTLS SECTION END] + } + if isClient && c.EncryptedClientHelloConfigList != nil && v < VersionTLS13 { + continue + } + if c != nil && c.MinVersion != 0 && v < c.MinVersion { + continue + } + if c != nil && c.MaxVersion != 0 && v > c.MaxVersion { + continue + } + versions = append(versions, v) + } + return versions +} + +func (c *Config) maxSupportedVersion(isClient bool) uint16 { + supportedVersions := c.supportedVersions(isClient) + if len(supportedVersions) == 0 { + return 0 + } + return supportedVersions[0] +} + +// supportedVersionsFromMax returns a list of supported versions derived from a +// legacy maximum version value. Note that only versions supported by this +// library are returned. Any newer peer will use supportedVersions anyway. +func supportedVersionsFromMax(maxVersion uint16) []uint16 { + versions := make([]uint16, 0, len(supportedVersions)) + for _, v := range supportedVersions { + if v > maxVersion { + continue + } + versions = append(versions, v) + } + return versions +} + +func (c *Config) curvePreferences(version uint16) []CurveID { + var curvePreferences []CurveID + // [uTLS] SECTION BEGIN + // if fips140tls.Required() { + // curvePreferences = slices.Clone(defaultCurvePreferencesFIPS) + // } else { + curvePreferences = defaultCurvePreferences() + // } + // [uTLS] SECTION END + if c != nil && len(c.CurvePreferences) != 0 { + curvePreferences = slices.DeleteFunc(curvePreferences, func(x CurveID) bool { + return !slices.Contains(c.CurvePreferences, x) + }) + } + if version < VersionTLS13 { + curvePreferences = slices.DeleteFunc(curvePreferences, isTLS13OnlyKeyExchange) + } + return curvePreferences +} + +func (c *Config) supportsCurve(version uint16, curve CurveID) bool { + for _, cc := range c.curvePreferences(version) { + if cc == curve { + return true + } + } + return false +} + +// mutualVersion returns the protocol version to use given the advertised +// versions of the peer. Priority is given to the peer preference order. +func (c *Config) mutualVersion(isClient bool, peerVersions []uint16) (uint16, bool) { + supportedVersions := c.supportedVersions(isClient) + for _, peerVersion := range peerVersions { + for _, v := range supportedVersions { + if v == peerVersion { + return v, true + } + } + } + return 0, false +} + +// errNoCertificates should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/xtls/xray-core +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname errNoCertificates +var errNoCertificates = errors.New("tls: no certificates configured") + +// getCertificate returns the best certificate for the given ClientHelloInfo, +// defaulting to the first element of c.Certificates. +func (c *Config) getCertificate(clientHello *ClientHelloInfo) (*Certificate, error) { + if c.GetCertificate != nil && + (len(c.Certificates) == 0 || len(clientHello.ServerName) > 0) { + cert, err := c.GetCertificate(clientHello) + if cert != nil || err != nil { + return cert, err + } + } + + if len(c.Certificates) == 0 { + return nil, errNoCertificates + } + + if len(c.Certificates) == 1 { + // There's only one choice, so no point doing any work. + return &c.Certificates[0], nil + } + + if c.NameToCertificate != nil { + name := strings.ToLower(clientHello.ServerName) + if cert, ok := c.NameToCertificate[name]; ok { + return cert, nil + } + if len(name) > 0 { + labels := strings.Split(name, ".") + labels[0] = "*" + wildcardName := strings.Join(labels, ".") + if cert, ok := c.NameToCertificate[wildcardName]; ok { + return cert, nil + } + } + } + + for _, cert := range c.Certificates { + if err := clientHello.SupportsCertificate(&cert); err == nil { + return &cert, nil + } + } + + // If nothing matches, return the first certificate. + return &c.Certificates[0], nil +} + +// SupportsCertificate returns nil if the provided certificate is supported by +// the client that sent the ClientHello. Otherwise, it returns an error +// describing the reason for the incompatibility. +// +// If this [ClientHelloInfo] was passed to a GetConfigForClient or GetCertificate +// callback, this method will take into account the associated [Config]. Note that +// if GetConfigForClient returns a different [Config], the change can't be +// accounted for by this method. +// +// This function will call x509.ParseCertificate unless c.Leaf is set, which can +// incur a significant performance cost. +func (chi *ClientHelloInfo) SupportsCertificate(c *Certificate) error { + // Note we don't currently support certificate_authorities nor + // signature_algorithms_cert, and don't check the algorithms of the + // signatures on the chain (which anyway are a SHOULD, see RFC 8446, + // Section 4.4.2.2). + + config := chi.config + if config == nil { + config = &Config{} + } + vers, ok := config.mutualVersion(roleServer, chi.SupportedVersions) + if !ok { + return errors.New("no mutually supported protocol versions") + } + + // If the client specified the name they are trying to connect to, the + // certificate needs to be valid for it. + if chi.ServerName != "" { + x509Cert, err := c.leaf() + if err != nil { + return fmt.Errorf("failed to parse certificate: %w", err) + } + if err := x509Cert.VerifyHostname(chi.ServerName); err != nil { + return fmt.Errorf("certificate is not valid for requested server name: %w", err) + } + } + + // supportsRSAFallback returns nil if the certificate and connection support + // the static RSA key exchange, and unsupported otherwise. The logic for + // supporting static RSA is completely disjoint from the logic for + // supporting signed key exchanges, so we just check it as a fallback. + supportsRSAFallback := func(unsupported error) error { + // TLS 1.3 dropped support for the static RSA key exchange. + if vers == VersionTLS13 { + return unsupported + } + // The static RSA key exchange works by decrypting a challenge with the + // RSA private key, not by signing, so check the PrivateKey implements + // crypto.Decrypter, like *rsa.PrivateKey does. + if priv, ok := c.PrivateKey.(crypto.Decrypter); ok { + if _, ok := priv.Public().(*rsa.PublicKey); !ok { + return unsupported + } + } else { + return unsupported + } + // Finally, there needs to be a mutual cipher suite that uses the static + // RSA key exchange instead of ECDHE. + rsaCipherSuite := selectCipherSuite(chi.CipherSuites, config.cipherSuites(), func(c *cipherSuite) bool { + if c.flags&suiteECDHE != 0 { + return false + } + if vers < VersionTLS12 && c.flags&suiteTLS12 != 0 { + return false + } + return true + }) + if rsaCipherSuite == nil { + return unsupported + } + return nil + } + + // If the client sent the signature_algorithms extension, ensure it supports + // schemes we can use with this certificate and TLS version. + if len(chi.SignatureSchemes) > 0 { + if _, err := selectSignatureScheme(vers, c, chi.SignatureSchemes); err != nil { + return supportsRSAFallback(err) + } + } + + // In TLS 1.3 we are done because supported_groups is only relevant to the + // ECDHE computation, point format negotiation is removed, cipher suites are + // only relevant to the AEAD choice, and static RSA does not exist. + if vers == VersionTLS13 { + return nil + } + + // The only signed key exchange we support is ECDHE. + if !supportsECDHE(config, vers, chi.SupportedCurves, chi.SupportedPoints) { + return supportsRSAFallback(errors.New("client doesn't support ECDHE, can only use legacy RSA key exchange")) + } + + var ecdsaCipherSuite bool + if priv, ok := c.PrivateKey.(crypto.Signer); ok { + switch pub := priv.Public().(type) { + case *ecdsa.PublicKey: + var curve CurveID + switch pub.Curve { + case elliptic.P256(): + curve = CurveP256 + case elliptic.P384(): + curve = CurveP384 + case elliptic.P521(): + curve = CurveP521 + default: + return supportsRSAFallback(unsupportedCertificateError(c)) + } + var curveOk bool + for _, c := range chi.SupportedCurves { + if c == curve && config.supportsCurve(vers, c) { + curveOk = true + break + } + } + if !curveOk { + return errors.New("client doesn't support certificate curve") + } + ecdsaCipherSuite = true + case ed25519.PublicKey: + if vers < VersionTLS12 || len(chi.SignatureSchemes) == 0 { + return errors.New("connection doesn't support Ed25519") + } + ecdsaCipherSuite = true + case *rsa.PublicKey: + default: + return supportsRSAFallback(unsupportedCertificateError(c)) + } + } else { + return supportsRSAFallback(unsupportedCertificateError(c)) + } + + // Make sure that there is a mutually supported cipher suite that works with + // this certificate. Cipher suite selection will then apply the logic in + // reverse to pick it. See also serverHandshakeState.cipherSuiteOk. + cipherSuite := selectCipherSuite(chi.CipherSuites, config.cipherSuites(), func(c *cipherSuite) bool { + if c.flags&suiteECDHE == 0 { + return false + } + if c.flags&suiteECSign != 0 { + if !ecdsaCipherSuite { + return false + } + } else { + if ecdsaCipherSuite { + return false + } + } + if vers < VersionTLS12 && c.flags&suiteTLS12 != 0 { + return false + } + return true + }) + if cipherSuite == nil { + return supportsRSAFallback(errors.New("client doesn't support any cipher suites compatible with the certificate")) + } + + return nil +} + +// SupportsCertificate returns nil if the provided certificate is supported by +// the server that sent the CertificateRequest. Otherwise, it returns an error +// describing the reason for the incompatibility. +func (cri *CertificateRequestInfo) SupportsCertificate(c *Certificate) error { + if _, err := selectSignatureScheme(cri.Version, c, cri.SignatureSchemes); err != nil { + return err + } + + if len(cri.AcceptableCAs) == 0 { + return nil + } + + for j, cert := range c.Certificate { + x509Cert := c.Leaf + // Parse the certificate if this isn't the leaf node, or if + // chain.Leaf was nil. + if j != 0 || x509Cert == nil { + var err error + if x509Cert, err = x509.ParseCertificate(cert); err != nil { + return fmt.Errorf("failed to parse certificate #%d in the chain: %w", j, err) + } + } + + for _, ca := range cri.AcceptableCAs { + if bytes.Equal(x509Cert.RawIssuer, ca) { + return nil + } + } + } + return errors.New("chain is not signed by an acceptable CA") +} + +// BuildNameToCertificate parses c.Certificates and builds c.NameToCertificate +// from the CommonName and SubjectAlternateName fields of each of the leaf +// certificates. +// +// Deprecated: NameToCertificate only allows associating a single certificate +// with a given name. Leave that field nil to let the library select the first +// compatible chain from Certificates. +func (c *Config) BuildNameToCertificate() { + c.NameToCertificate = make(map[string]*Certificate) + for i := range c.Certificates { + cert := &c.Certificates[i] + x509Cert, err := cert.leaf() + if err != nil { + continue + } + // If SANs are *not* present, some clients will consider the certificate + // valid for the name in the Common Name. + if x509Cert.Subject.CommonName != "" && len(x509Cert.DNSNames) == 0 { + c.NameToCertificate[x509Cert.Subject.CommonName] = cert + } + for _, san := range x509Cert.DNSNames { + c.NameToCertificate[san] = cert + } + } +} + +const ( + keyLogLabelTLS12 = "CLIENT_RANDOM" + keyLogLabelClientHandshake = "CLIENT_HANDSHAKE_TRAFFIC_SECRET" + keyLogLabelServerHandshake = "SERVER_HANDSHAKE_TRAFFIC_SECRET" + keyLogLabelClientTraffic = "CLIENT_TRAFFIC_SECRET_0" + keyLogLabelServerTraffic = "SERVER_TRAFFIC_SECRET_0" +) + +func (c *Config) writeKeyLog(label string, clientRandom, secret []byte) error { + if c.KeyLogWriter == nil { + return nil + } + + logLine := fmt.Appendf(nil, "%s %x %x\n", label, clientRandom, secret) + + writerMutex.Lock() + _, err := c.KeyLogWriter.Write(logLine) + writerMutex.Unlock() + + return err +} + +// writerMutex protects all KeyLogWriters globally. It is rarely enabled, +// and is only for debugging, so a global mutex saves space. +var writerMutex sync.Mutex + +// A Certificate is a chain of one or more certificates, leaf first. +type Certificate struct { + Certificate [][]byte + // PrivateKey contains the private key corresponding to the public key in + // Leaf. This must implement crypto.Signer with an RSA, ECDSA or Ed25519 PublicKey. + // For a server up to TLS 1.2, it can also implement crypto.Decrypter with + // an RSA PublicKey. + PrivateKey crypto.PrivateKey + // SupportedSignatureAlgorithms is an optional list restricting what + // signature algorithms the PrivateKey can be used for. + SupportedSignatureAlgorithms []SignatureScheme + // OCSPStaple contains an optional OCSP response which will be served + // to clients that request it. + OCSPStaple []byte + // SignedCertificateTimestamps contains an optional list of Signed + // Certificate Timestamps which will be served to clients that request it. + SignedCertificateTimestamps [][]byte + // Leaf is the parsed form of the leaf certificate, which may be initialized + // using x509.ParseCertificate to reduce per-handshake processing. If nil, + // the leaf certificate will be parsed as needed. + Leaf *x509.Certificate +} + +// leaf returns the parsed leaf certificate, either from c.Leaf or by parsing +// the corresponding c.Certificate[0]. +func (c *Certificate) leaf() (*x509.Certificate, error) { + if c.Leaf != nil { + return c.Leaf, nil + } + return x509.ParseCertificate(c.Certificate[0]) +} + +type handshakeMessage interface { + marshal() ([]byte, error) + unmarshal([]byte) bool +} + +type handshakeMessageWithOriginalBytes interface { + handshakeMessage + + // originalBytes should return the original bytes that were passed to + // unmarshal to create the message. If the message was not produced by + // unmarshal, it should return nil. + originalBytes() []byte +} + +// lruSessionCache is a ClientSessionCache implementation that uses an LRU +// caching strategy. +type lruSessionCache struct { + sync.Mutex + + m map[string]*list.Element + q *list.List + capacity int +} + +type lruSessionCacheEntry struct { + sessionKey string + state *ClientSessionState +} + +// NewLRUClientSessionCache returns a [ClientSessionCache] with the given +// capacity that uses an LRU strategy. If capacity is < 1, a default capacity +// is used instead. +func NewLRUClientSessionCache(capacity int) ClientSessionCache { + const defaultSessionCacheCapacity = 64 + + if capacity < 1 { + capacity = defaultSessionCacheCapacity + } + return &lruSessionCache{ + m: make(map[string]*list.Element), + q: list.New(), + capacity: capacity, + } +} + +// Put adds the provided (sessionKey, cs) pair to the cache. If cs is nil, the entry +// corresponding to sessionKey is removed from the cache instead. +func (c *lruSessionCache) Put(sessionKey string, cs *ClientSessionState) { + c.Lock() + defer c.Unlock() + + if elem, ok := c.m[sessionKey]; ok { + if cs == nil { + c.q.Remove(elem) + delete(c.m, sessionKey) + } else { + entry := elem.Value.(*lruSessionCacheEntry) + entry.state = cs + c.q.MoveToFront(elem) + } + return + } + + if c.q.Len() < c.capacity { + entry := &lruSessionCacheEntry{sessionKey, cs} + c.m[sessionKey] = c.q.PushFront(entry) + return + } + + elem := c.q.Back() + entry := elem.Value.(*lruSessionCacheEntry) + delete(c.m, entry.sessionKey) + entry.sessionKey = sessionKey + entry.state = cs + c.q.MoveToFront(elem) + c.m[sessionKey] = elem +} + +// Get returns the [ClientSessionState] value associated with a given key. It +// returns (nil, false) if no value is found. +func (c *lruSessionCache) Get(sessionKey string) (*ClientSessionState, bool) { + c.Lock() + defer c.Unlock() + + if elem, ok := c.m[sessionKey]; ok { + c.q.MoveToFront(elem) + return elem.Value.(*lruSessionCacheEntry).state, true + } + return nil, false +} + +var emptyConfig Config + +func defaultConfig() *Config { + return &emptyConfig +} + +func unexpectedMessageError(wanted, got any) error { + return fmt.Errorf("tls: received unexpected handshake message of type %T when waiting for %T", got, wanted) +} + +// supportedSignatureAlgorithms returns the supported signature algorithms. +func supportedSignatureAlgorithms() []SignatureScheme { + // [uTLS] SECTION BEGIN + // if !fips140tls.Required() { + return defaultSupportedSignatureAlgorithms + // } + // return defaultSupportedSignatureAlgorithmsFIPS + // [uTLS] SECTION END +} + +func isSupportedSignatureAlgorithm(sigAlg SignatureScheme, supportedSignatureAlgorithms []SignatureScheme) bool { + for _, s := range supportedSignatureAlgorithms { + if s == sigAlg { + return true + } + } + return false +} + +// CertificateVerificationError is returned when certificate verification fails during the handshake. +type CertificateVerificationError struct { + // UnverifiedCertificates and its contents should not be modified. + UnverifiedCertificates []*x509.Certificate + Err error +} + +func (e *CertificateVerificationError) Error() string { + return fmt.Sprintf("tls: failed to verify certificate: %s", e.Err) +} + +func (e *CertificateVerificationError) Unwrap() error { + return e.Err +} + +// fipsAllowedChains returns chains that are allowed to be used in a TLS connection +// based on the current fips140tls enforcement setting. +// +// If fips140tls is not required, the chains are returned as-is with no processing. +// Otherwise, the returned chains are filtered to only those allowed by FIPS 140-3. +// If this results in no chains it returns an error. +func fipsAllowedChains(chains [][]*x509.Certificate) ([][]*x509.Certificate, error) { + if !fips140tls.Required() { + return chains, nil + } + + permittedChains := make([][]*x509.Certificate, 0, len(chains)) + for _, chain := range chains { + if fipsAllowChain(chain) { + permittedChains = append(permittedChains, chain) + } + } + + if len(permittedChains) == 0 { + return nil, errors.New("tls: no FIPS compatible certificate chains found") + } + + return permittedChains, nil +} + +func fipsAllowChain(chain []*x509.Certificate) bool { + if len(chain) == 0 { + return false + } + + for _, cert := range chain { + if !fipsAllowCert(cert) { + return false + } + } + + return true +} + +func fipsAllowCert(c *x509.Certificate) bool { + // The key must be RSA 2048, RSA 3072, RSA 4096, + // or ECDSA P-256, P-384, P-521. + switch k := c.PublicKey.(type) { + case *rsa.PublicKey: + size := k.N.BitLen() + return size == 2048 || size == 3072 || size == 4096 + case *ecdsa.PublicKey: + return k.Curve == elliptic.P256() || k.Curve == elliptic.P384() || k.Curve == elliptic.P521() + } + + return false +} diff --git a/backend/vendor/github.com/refraction-networking/utls/common_string.go b/backend/vendor/github.com/refraction-networking/utls/common_string.go new file mode 100644 index 0000000..e15dd48 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/common_string.go @@ -0,0 +1,120 @@ +// Code generated by "stringer -linecomment -type=SignatureScheme,CurveID,ClientAuthType -output=common_string.go"; DO NOT EDIT. + +package tls + +import "strconv" + +func _() { + // An "invalid array index" compiler error signifies that the constant values have changed. + // Re-run the stringer command to generate them again. + var x [1]struct{} + _ = x[PKCS1WithSHA256-1025] + _ = x[PKCS1WithSHA384-1281] + _ = x[PKCS1WithSHA512-1537] + _ = x[PSSWithSHA256-2052] + _ = x[PSSWithSHA384-2053] + _ = x[PSSWithSHA512-2054] + _ = x[ECDSAWithP256AndSHA256-1027] + _ = x[ECDSAWithP384AndSHA384-1283] + _ = x[ECDSAWithP521AndSHA512-1539] + _ = x[Ed25519-2055] + _ = x[PKCS1WithSHA1-513] + _ = x[ECDSAWithSHA1-515] +} + +const ( + _SignatureScheme_name_0 = "PKCS1WithSHA1" + _SignatureScheme_name_1 = "ECDSAWithSHA1" + _SignatureScheme_name_2 = "PKCS1WithSHA256" + _SignatureScheme_name_3 = "ECDSAWithP256AndSHA256" + _SignatureScheme_name_4 = "PKCS1WithSHA384" + _SignatureScheme_name_5 = "ECDSAWithP384AndSHA384" + _SignatureScheme_name_6 = "PKCS1WithSHA512" + _SignatureScheme_name_7 = "ECDSAWithP521AndSHA512" + _SignatureScheme_name_8 = "PSSWithSHA256PSSWithSHA384PSSWithSHA512Ed25519" +) + +var ( + _SignatureScheme_index_8 = [...]uint8{0, 13, 26, 39, 46} +) + +func (i SignatureScheme) String() string { + switch { + case i == 513: + return _SignatureScheme_name_0 + case i == 515: + return _SignatureScheme_name_1 + case i == 1025: + return _SignatureScheme_name_2 + case i == 1027: + return _SignatureScheme_name_3 + case i == 1281: + return _SignatureScheme_name_4 + case i == 1283: + return _SignatureScheme_name_5 + case i == 1537: + return _SignatureScheme_name_6 + case i == 1539: + return _SignatureScheme_name_7 + case 2052 <= i && i <= 2055: + i -= 2052 + return _SignatureScheme_name_8[_SignatureScheme_index_8[i]:_SignatureScheme_index_8[i+1]] + default: + return "SignatureScheme(" + strconv.FormatInt(int64(i), 10) + ")" + } +} +func _() { + // An "invalid array index" compiler error signifies that the constant values have changed. + // Re-run the stringer command to generate them again. + var x [1]struct{} + _ = x[CurveP256-23] + _ = x[CurveP384-24] + _ = x[CurveP521-25] + _ = x[X25519-29] + _ = x[X25519MLKEM768-4588] +} + +const ( + _CurveID_name_0 = "CurveP256CurveP384CurveP521" + _CurveID_name_1 = "X25519" + _CurveID_name_2 = "X25519MLKEM768" +) + +var ( + _CurveID_index_0 = [...]uint8{0, 9, 18, 27} +) + +func (i CurveID) String() string { + switch { + case 23 <= i && i <= 25: + i -= 23 + return _CurveID_name_0[_CurveID_index_0[i]:_CurveID_index_0[i+1]] + case i == 29: + return _CurveID_name_1 + case i == 4588: + return _CurveID_name_2 + default: + return "CurveID(" + strconv.FormatInt(int64(i), 10) + ")" + } +} +func _() { + // An "invalid array index" compiler error signifies that the constant values have changed. + // Re-run the stringer command to generate them again. + var x [1]struct{} + _ = x[NoClientCert-0] + _ = x[RequestClientCert-1] + _ = x[RequireAnyClientCert-2] + _ = x[VerifyClientCertIfGiven-3] + _ = x[RequireAndVerifyClientCert-4] +} + +const _ClientAuthType_name = "NoClientCertRequestClientCertRequireAnyClientCertVerifyClientCertIfGivenRequireAndVerifyClientCert" + +var _ClientAuthType_index = [...]uint8{0, 12, 29, 49, 72, 98} + +func (i ClientAuthType) String() string { + if i < 0 || i >= ClientAuthType(len(_ClientAuthType_index)-1) { + return "ClientAuthType(" + strconv.FormatInt(int64(i), 10) + ")" + } + return _ClientAuthType_name[_ClientAuthType_index[i]:_ClientAuthType_index[i+1]] +} diff --git a/backend/vendor/github.com/refraction-networking/utls/conn.go b/backend/vendor/github.com/refraction-networking/utls/conn.go new file mode 100644 index 0000000..f761cca --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/conn.go @@ -0,0 +1,1701 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// TLS low level connection and record layer + +package tls + +import ( + "bytes" + "context" + "crypto/cipher" + "crypto/subtle" + "crypto/x509" + "errors" + "fmt" + "hash" + "io" + "net" + "sync" + "sync/atomic" + "time" +) + +// A Conn represents a secured connection. +// It implements the net.Conn interface. +type Conn struct { + // constant + conn net.Conn + isClient bool + handshakeFn func(context.Context) error // (*Conn).clientHandshake or serverHandshake + quic *quicState // nil for non-QUIC connections + + // isHandshakeComplete is true if the connection is currently transferring + // application data (i.e. is not currently processing a handshake). + // isHandshakeComplete is true implies handshakeErr == nil. + isHandshakeComplete atomic.Bool + // constant after handshake; protected by handshakeMutex + handshakeMutex sync.Mutex + handshakeErr error // error resulting from handshake + vers uint16 // TLS version + haveVers bool // version has been negotiated + config *Config // configuration passed to constructor + // handshakes counts the number of handshakes performed on the + // connection so far. If renegotiation is disabled then this is either + // zero or one. + handshakes int + extMasterSecret bool + didResume bool // whether this connection was a session resumption + didHRR bool // whether a HelloRetryRequest was sent/received + cipherSuite uint16 + curveID CurveID + ocspResponse []byte // stapled OCSP response + scts [][]byte // signed certificate timestamps from server + peerCertificates []*x509.Certificate + // activeCertHandles contains the cache handles to certificates in + // peerCertificates that are used to track active references. + activeCertHandles []*activeCert + // verifiedChains contains the certificate chains that we built, as + // opposed to the ones presented by the server. + verifiedChains [][]*x509.Certificate + // serverName contains the server name indicated by the client, if any. + serverName string + // secureRenegotiation is true if the server echoed the secure + // renegotiation extension. (This is meaningless as a server because + // renegotiation is not supported in that case.) + secureRenegotiation bool + // ekm is a closure for exporting keying material. + ekm func(label string, context []byte, length int) ([]byte, error) + // resumptionSecret is the resumption_master_secret for handling + // or sending NewSessionTicket messages. + resumptionSecret []byte + echAccepted bool + + // ticketKeys is the set of active session ticket keys for this + // connection. The first one is used to encrypt new tickets and + // all are tried to decrypt tickets. + ticketKeys []ticketKey + + // clientFinishedIsFirst is true if the client sent the first Finished + // message during the most recent handshake. This is recorded because + // the first transmitted Finished message is the tls-unique + // channel-binding value. + clientFinishedIsFirst bool + + // closeNotifyErr is any error from sending the alertCloseNotify record. + closeNotifyErr error + // closeNotifySent is true if the Conn attempted to send an + // alertCloseNotify record. + closeNotifySent bool + + // clientFinished and serverFinished contain the Finished message sent + // by the client or server in the most recent handshake. This is + // retained to support the renegotiation extension and tls-unique + // channel-binding. + clientFinished [12]byte + serverFinished [12]byte + + // clientProtocol is the negotiated ALPN protocol. + clientProtocol string + + utls utlsConnExtraFields // [UTLS] used for extensive things such as ALPS, PSK, etc + + // input/output + in, out halfConn + rawInput bytes.Buffer // raw input, starting with a record header + input bytes.Reader // application data waiting to be read, from rawInput.Next + hand bytes.Buffer // handshake data waiting to be read + buffering bool // whether records are buffered in sendBuf + sendBuf []byte // a buffer of records waiting to be sent + + // bytesSent counts the bytes of application data sent. + // packetsSent counts packets. + bytesSent int64 + packetsSent int64 + + // retryCount counts the number of consecutive non-advancing records + // received by Conn.readRecord. That is, records that neither advance the + // handshake, nor deliver application data. Protected by in.Mutex. + retryCount int + + // activeCall indicates whether Close has been call in the low bit. + // the rest of the bits are the number of goroutines in Conn.Write. + activeCall atomic.Int32 + + tmp [16]byte +} + +// Access to net.Conn methods. +// Cannot just embed net.Conn because that would +// export the struct field too. + +// LocalAddr returns the local network address. +func (c *Conn) LocalAddr() net.Addr { + return c.conn.LocalAddr() +} + +// RemoteAddr returns the remote network address. +func (c *Conn) RemoteAddr() net.Addr { + return c.conn.RemoteAddr() +} + +// SetDeadline sets the read and write deadlines associated with the connection. +// A zero value for t means [Conn.Read] and [Conn.Write] will not time out. +// After a Write has timed out, the TLS state is corrupt and all future writes will return the same error. +func (c *Conn) SetDeadline(t time.Time) error { + return c.conn.SetDeadline(t) +} + +// SetReadDeadline sets the read deadline on the underlying connection. +// A zero value for t means [Conn.Read] will not time out. +func (c *Conn) SetReadDeadline(t time.Time) error { + return c.conn.SetReadDeadline(t) +} + +// SetWriteDeadline sets the write deadline on the underlying connection. +// A zero value for t means [Conn.Write] will not time out. +// After a [Conn.Write] has timed out, the TLS state is corrupt and all future writes will return the same error. +func (c *Conn) SetWriteDeadline(t time.Time) error { + return c.conn.SetWriteDeadline(t) +} + +// NetConn returns the underlying connection that is wrapped by c. +// Note that writing to or reading from this connection directly will corrupt the +// TLS session. +func (c *Conn) NetConn() net.Conn { + return c.conn +} + +// A halfConn represents one direction of the record layer +// connection, either sending or receiving. +type halfConn struct { + sync.Mutex + + err error // first permanent error + version uint16 // protocol version + cipher any // cipher algorithm + mac hash.Hash + seq [8]byte // 64-bit sequence number + + scratchBuf [13]byte // to avoid allocs; interface method args escape + + nextCipher any // next encryption state + nextMac hash.Hash // next MAC algorithm + + level QUICEncryptionLevel // current QUIC encryption level + trafficSecret []byte // current TLS 1.3 traffic secret +} + +type permanentError struct { + err net.Error +} + +func (e *permanentError) Error() string { return e.err.Error() } +func (e *permanentError) Unwrap() error { return e.err } +func (e *permanentError) Timeout() bool { return e.err.Timeout() } +func (e *permanentError) Temporary() bool { return false } + +func (hc *halfConn) setErrorLocked(err error) error { + if e, ok := err.(net.Error); ok { + hc.err = &permanentError{err: e} + } else { + hc.err = err + } + return hc.err +} + +// prepareCipherSpec sets the encryption and MAC states +// that a subsequent changeCipherSpec will use. +func (hc *halfConn) prepareCipherSpec(version uint16, cipher any, mac hash.Hash) { + hc.version = version + hc.nextCipher = cipher + hc.nextMac = mac +} + +// changeCipherSpec changes the encryption and MAC states +// to the ones previously passed to prepareCipherSpec. +func (hc *halfConn) changeCipherSpec() error { + if hc.nextCipher == nil || hc.version == VersionTLS13 { + return alertInternalError + } + hc.cipher = hc.nextCipher + hc.mac = hc.nextMac + hc.nextCipher = nil + hc.nextMac = nil + for i := range hc.seq { + hc.seq[i] = 0 + } + return nil +} + +func (hc *halfConn) setTrafficSecret(suite *cipherSuiteTLS13, level QUICEncryptionLevel, secret []byte) { + hc.trafficSecret = secret + hc.level = level + key, iv := suite.trafficKey(secret) + hc.cipher = suite.aead(key, iv) + for i := range hc.seq { + hc.seq[i] = 0 + } +} + +// incSeq increments the sequence number. +func (hc *halfConn) incSeq() { + for i := 7; i >= 0; i-- { + hc.seq[i]++ + if hc.seq[i] != 0 { + return + } + } + + // Not allowed to let sequence number wrap. + // Instead, must renegotiate before it does. + // Not likely enough to bother. + panic("TLS: sequence number wraparound") +} + +// explicitNonceLen returns the number of bytes of explicit nonce or IV included +// in each record. Explicit nonces are present only in CBC modes after TLS 1.0 +// and in certain AEAD modes in TLS 1.2. +func (hc *halfConn) explicitNonceLen() int { + if hc.cipher == nil { + return 0 + } + + switch c := hc.cipher.(type) { + case cipher.Stream: + return 0 + case aead: + return c.explicitNonceLen() + case cbcMode: + // TLS 1.1 introduced a per-record explicit IV to fix the BEAST attack. + if hc.version >= VersionTLS11 { + return c.BlockSize() + } + return 0 + default: + panic("unknown cipher type") + } +} + +// extractPadding returns, in constant time, the length of the padding to remove +// from the end of payload. It also returns a byte which is equal to 255 if the +// padding was valid and 0 otherwise. See RFC 2246, Section 6.2.3.2. +func extractPadding(payload []byte) (toRemove int, good byte) { + if len(payload) < 1 { + return 0, 0 + } + + paddingLen := payload[len(payload)-1] + t := uint(len(payload)-1) - uint(paddingLen) + // if len(payload) >= (paddingLen - 1) then the MSB of t is zero + good = byte(int32(^t) >> 31) + + // The maximum possible padding length plus the actual length field + toCheck := 256 + // The length of the padded data is public, so we can use an if here + if toCheck > len(payload) { + toCheck = len(payload) + } + + for i := 0; i < toCheck; i++ { + t := uint(paddingLen) - uint(i) + // if i <= paddingLen then the MSB of t is zero + mask := byte(int32(^t) >> 31) + b := payload[len(payload)-1-i] + good &^= mask&paddingLen ^ mask&b + } + + // We AND together the bits of good and replicate the result across + // all the bits. + good &= good << 4 + good &= good << 2 + good &= good << 1 + good = uint8(int8(good) >> 7) + + // Zero the padding length on error. This ensures any unchecked bytes + // are included in the MAC. Otherwise, an attacker that could + // distinguish MAC failures from padding failures could mount an attack + // similar to POODLE in SSL 3.0: given a good ciphertext that uses a + // full block's worth of padding, replace the final block with another + // block. If the MAC check passed but the padding check failed, the + // last byte of that block decrypted to the block size. + // + // See also macAndPaddingGood logic below. + paddingLen &= good + + toRemove = int(paddingLen) + 1 + return +} + +func roundUp(a, b int) int { + return a + (b-a%b)%b +} + +// cbcMode is an interface for block ciphers using cipher block chaining. +type cbcMode interface { + cipher.BlockMode + SetIV([]byte) +} + +// decrypt authenticates and decrypts the record if protection is active at +// this stage. The returned plaintext might overlap with the input. +func (hc *halfConn) decrypt(record []byte) ([]byte, recordType, error) { + var plaintext []byte + typ := recordType(record[0]) + payload := record[recordHeaderLen:] + + // In TLS 1.3, change_cipher_spec messages are to be ignored without being + // decrypted. See RFC 8446, Appendix D.4. + if hc.version == VersionTLS13 && typ == recordTypeChangeCipherSpec { + return payload, typ, nil + } + + paddingGood := byte(255) + paddingLen := 0 + + explicitNonceLen := hc.explicitNonceLen() + + if hc.cipher != nil { + switch c := hc.cipher.(type) { + case cipher.Stream: + c.XORKeyStream(payload, payload) + case aead: + if len(payload) < explicitNonceLen { + return nil, 0, alertBadRecordMAC + } + nonce := payload[:explicitNonceLen] + if len(nonce) == 0 { + nonce = hc.seq[:] + } + payload = payload[explicitNonceLen:] + + var additionalData []byte + if hc.version == VersionTLS13 { + additionalData = record[:recordHeaderLen] + } else { + additionalData = append(hc.scratchBuf[:0], hc.seq[:]...) + additionalData = append(additionalData, record[:3]...) + n := len(payload) - c.Overhead() + additionalData = append(additionalData, byte(n>>8), byte(n)) + } + + var err error + plaintext, err = c.Open(payload[:0], nonce, payload, additionalData) + if err != nil { + return nil, 0, alertBadRecordMAC + } + case cbcMode: + blockSize := c.BlockSize() + minPayload := explicitNonceLen + roundUp(hc.mac.Size()+1, blockSize) + if len(payload)%blockSize != 0 || len(payload) < minPayload { + return nil, 0, alertBadRecordMAC + } + + if explicitNonceLen > 0 { + c.SetIV(payload[:explicitNonceLen]) + payload = payload[explicitNonceLen:] + } + c.CryptBlocks(payload, payload) + + // In a limited attempt to protect against CBC padding oracles like + // Lucky13, the data past paddingLen (which is secret) is passed to + // the MAC function as extra data, to be fed into the HMAC after + // computing the digest. This makes the MAC roughly constant time as + // long as the digest computation is constant time and does not + // affect the subsequent write, modulo cache effects. + paddingLen, paddingGood = extractPadding(payload) + default: + panic("unknown cipher type") + } + + if hc.version == VersionTLS13 { + if typ != recordTypeApplicationData { + return nil, 0, alertUnexpectedMessage + } + if len(plaintext) > maxPlaintext+1 { + return nil, 0, alertRecordOverflow + } + // Remove padding and find the ContentType scanning from the end. + for i := len(plaintext) - 1; i >= 0; i-- { + if plaintext[i] != 0 { + typ = recordType(plaintext[i]) + plaintext = plaintext[:i] + break + } + if i == 0 { + return nil, 0, alertUnexpectedMessage + } + } + } + } else { + plaintext = payload + } + + if hc.mac != nil { + macSize := hc.mac.Size() + if len(payload) < macSize { + return nil, 0, alertBadRecordMAC + } + + n := len(payload) - macSize - paddingLen + n = subtle.ConstantTimeSelect(int(uint32(n)>>31), 0, n) // if n < 0 { n = 0 } + record[3] = byte(n >> 8) + record[4] = byte(n) + remoteMAC := payload[n : n+macSize] + localMAC := tls10MAC(hc.mac, hc.scratchBuf[:0], hc.seq[:], record[:recordHeaderLen], payload[:n], payload[n+macSize:]) + + // This is equivalent to checking the MACs and paddingGood + // separately, but in constant-time to prevent distinguishing + // padding failures from MAC failures. Depending on what value + // of paddingLen was returned on bad padding, distinguishing + // bad MAC from bad padding can lead to an attack. + // + // See also the logic at the end of extractPadding. + macAndPaddingGood := subtle.ConstantTimeCompare(localMAC, remoteMAC) & int(paddingGood) + if macAndPaddingGood != 1 { + return nil, 0, alertBadRecordMAC + } + + plaintext = payload[:n] + } + + hc.incSeq() + return plaintext, typ, nil +} + +// sliceForAppend extends the input slice by n bytes. head is the full extended +// slice, while tail is the appended part. If the original slice has sufficient +// capacity no allocation is performed. +func sliceForAppend(in []byte, n int) (head, tail []byte) { + if total := len(in) + n; cap(in) >= total { + head = in[:total] + } else { + head = make([]byte, total) + copy(head, in) + } + tail = head[len(in):] + return +} + +// encrypt encrypts payload, adding the appropriate nonce and/or MAC, and +// appends it to record, which must already contain the record header. +func (hc *halfConn) encrypt(record, payload []byte, rand io.Reader) ([]byte, error) { + if hc.cipher == nil { + return append(record, payload...), nil + } + + var explicitNonce []byte + if explicitNonceLen := hc.explicitNonceLen(); explicitNonceLen > 0 { + record, explicitNonce = sliceForAppend(record, explicitNonceLen) + if _, isCBC := hc.cipher.(cbcMode); !isCBC && explicitNonceLen < 16 { + // The AES-GCM construction in TLS has an explicit nonce so that the + // nonce can be random. However, the nonce is only 8 bytes which is + // too small for a secure, random nonce. Therefore we use the + // sequence number as the nonce. The 3DES-CBC construction also has + // an 8 bytes nonce but its nonces must be unpredictable (see RFC + // 5246, Appendix F.3), forcing us to use randomness. That's not + // 3DES' biggest problem anyway because the birthday bound on block + // collision is reached first due to its similarly small block size + // (see the Sweet32 attack). + copy(explicitNonce, hc.seq[:]) + } else { + if _, err := io.ReadFull(rand, explicitNonce); err != nil { + return nil, err + } + } + } + + var dst []byte + switch c := hc.cipher.(type) { + case cipher.Stream: + mac := tls10MAC(hc.mac, hc.scratchBuf[:0], hc.seq[:], record[:recordHeaderLen], payload, nil) + record, dst = sliceForAppend(record, len(payload)+len(mac)) + c.XORKeyStream(dst[:len(payload)], payload) + c.XORKeyStream(dst[len(payload):], mac) + case aead: + nonce := explicitNonce + if len(nonce) == 0 { + nonce = hc.seq[:] + } + + if hc.version == VersionTLS13 { + record = append(record, payload...) + + // Encrypt the actual ContentType and replace the plaintext one. + record = append(record, record[0]) + record[0] = byte(recordTypeApplicationData) + + n := len(payload) + 1 + c.Overhead() + record[3] = byte(n >> 8) + record[4] = byte(n) + + record = c.Seal(record[:recordHeaderLen], + nonce, record[recordHeaderLen:], record[:recordHeaderLen]) + } else { + additionalData := append(hc.scratchBuf[:0], hc.seq[:]...) + additionalData = append(additionalData, record[:recordHeaderLen]...) + record = c.Seal(record, nonce, payload, additionalData) + } + case cbcMode: + mac := tls10MAC(hc.mac, hc.scratchBuf[:0], hc.seq[:], record[:recordHeaderLen], payload, nil) + blockSize := c.BlockSize() + plaintextLen := len(payload) + len(mac) + paddingLen := blockSize - plaintextLen%blockSize + record, dst = sliceForAppend(record, plaintextLen+paddingLen) + copy(dst, payload) + copy(dst[len(payload):], mac) + for i := plaintextLen; i < len(dst); i++ { + dst[i] = byte(paddingLen - 1) + } + if len(explicitNonce) > 0 { + c.SetIV(explicitNonce) + } + c.CryptBlocks(dst, dst) + default: + panic("unknown cipher type") + } + + // Update length to include nonce, MAC and any block padding needed. + n := len(record) - recordHeaderLen + record[3] = byte(n >> 8) + record[4] = byte(n) + hc.incSeq() + + return record, nil +} + +// RecordHeaderError is returned when a TLS record header is invalid. +type RecordHeaderError struct { + // Msg contains a human readable string that describes the error. + Msg string + // RecordHeader contains the five bytes of TLS record header that + // triggered the error. + RecordHeader [5]byte + // Conn provides the underlying net.Conn in the case that a client + // sent an initial handshake that didn't look like TLS. + // It is nil if there's already been a handshake or a TLS alert has + // been written to the connection. + Conn net.Conn +} + +func (e RecordHeaderError) Error() string { return "tls: " + e.Msg } + +func (c *Conn) newRecordHeaderError(conn net.Conn, msg string) (err RecordHeaderError) { + err.Msg = msg + err.Conn = conn + copy(err.RecordHeader[:], c.rawInput.Bytes()) + return err +} + +func (c *Conn) readRecord() error { + return c.readRecordOrCCS(false) +} + +func (c *Conn) readChangeCipherSpec() error { + return c.readRecordOrCCS(true) +} + +// readRecordOrCCS reads one or more TLS records from the connection and +// updates the record layer state. Some invariants: +// - c.in must be locked +// - c.input must be empty +// +// During the handshake one and only one of the following will happen: +// - c.hand grows +// - c.in.changeCipherSpec is called +// - an error is returned +// +// After the handshake one and only one of the following will happen: +// - c.hand grows +// - c.input is set +// - an error is returned +func (c *Conn) readRecordOrCCS(expectChangeCipherSpec bool) error { + if c.in.err != nil { + return c.in.err + } + handshakeComplete := c.isHandshakeComplete.Load() + + // This function modifies c.rawInput, which owns the c.input memory. + if c.input.Len() != 0 { + return c.in.setErrorLocked(errors.New("tls: internal error: attempted to read record with pending application data")) + } + c.input.Reset(nil) + + if c.quic != nil { + return c.in.setErrorLocked(errors.New("tls: internal error: attempted to read record with QUIC transport")) + } + + // Read header, payload. + if err := c.readFromUntil(c.conn, recordHeaderLen); err != nil { + // RFC 8446, Section 6.1 suggests that EOF without an alertCloseNotify + // is an error, but popular web sites seem to do this, so we accept it + // if and only if at the record boundary. + if err == io.ErrUnexpectedEOF && c.rawInput.Len() == 0 { + err = io.EOF + } + if e, ok := err.(net.Error); !ok || !e.Temporary() { + c.in.setErrorLocked(err) + } + return err + } + hdr := c.rawInput.Bytes()[:recordHeaderLen] + typ := recordType(hdr[0]) + + // No valid TLS record has a type of 0x80, however SSLv2 handshakes + // start with a uint16 length where the MSB is set and the first record + // is always < 256 bytes long. Therefore typ == 0x80 strongly suggests + // an SSLv2 client. + if !handshakeComplete && typ == 0x80 { + c.sendAlert(alertProtocolVersion) + return c.in.setErrorLocked(c.newRecordHeaderError(nil, "unsupported SSLv2 handshake received")) + } + + vers := uint16(hdr[1])<<8 | uint16(hdr[2]) + expectedVers := c.vers + if expectedVers == VersionTLS13 { + // All TLS 1.3 records are expected to have 0x0303 (1.2) after + // the initial hello (RFC 8446 Section 5.1). + expectedVers = VersionTLS12 + } + n := int(hdr[3])<<8 | int(hdr[4]) + if c.haveVers && vers != expectedVers { + c.sendAlert(alertProtocolVersion) + msg := fmt.Sprintf("received record with version %x when expecting version %x", vers, expectedVers) + return c.in.setErrorLocked(c.newRecordHeaderError(nil, msg)) + } + if !c.haveVers { + // First message, be extra suspicious: this might not be a TLS + // client. Bail out before reading a full 'body', if possible. + // The current max version is 3.3 so if the version is >= 16.0, + // it's probably not real. + if (typ != recordTypeAlert && typ != recordTypeHandshake) || vers >= 0x1000 { + return c.in.setErrorLocked(c.newRecordHeaderError(c.conn, "first record does not look like a TLS handshake")) + } + } + if c.vers == VersionTLS13 && n > maxCiphertextTLS13 || n > maxCiphertext { + c.sendAlert(alertRecordOverflow) + msg := fmt.Sprintf("oversized record received with length %d", n) + return c.in.setErrorLocked(c.newRecordHeaderError(nil, msg)) + } + if err := c.readFromUntil(c.conn, recordHeaderLen+n); err != nil { + if e, ok := err.(net.Error); !ok || !e.Temporary() { + c.in.setErrorLocked(err) + } + return err + } + + // Process message. + record := c.rawInput.Next(recordHeaderLen + n) + data, typ, err := c.in.decrypt(record) + if err != nil { + return c.in.setErrorLocked(c.sendAlert(err.(alert))) + } + if len(data) > maxPlaintext { + return c.in.setErrorLocked(c.sendAlert(alertRecordOverflow)) + } + + // Application Data messages are always protected. + if c.in.cipher == nil && typ == recordTypeApplicationData { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + + if typ != recordTypeAlert && typ != recordTypeChangeCipherSpec && len(data) > 0 { + // This is a state-advancing message: reset the retry count. + c.retryCount = 0 + } + + // Handshake messages MUST NOT be interleaved with other record types in TLS 1.3. + if c.vers == VersionTLS13 && typ != recordTypeHandshake && c.hand.Len() > 0 { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + + switch typ { + default: + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + + case recordTypeAlert: + if c.quic != nil { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + if len(data) != 2 { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + if alert(data[1]) == alertCloseNotify { + return c.in.setErrorLocked(io.EOF) + } + if c.vers == VersionTLS13 { + return c.in.setErrorLocked(&net.OpError{Op: "remote error", Err: alert(data[1])}) + } + switch data[0] { + case alertLevelWarning: + // Drop the record on the floor and retry. + return c.retryReadRecord(expectChangeCipherSpec) + case alertLevelError: + return c.in.setErrorLocked(&net.OpError{Op: "remote error", Err: alert(data[1])}) + default: + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + + case recordTypeChangeCipherSpec: + if len(data) != 1 || data[0] != 1 { + return c.in.setErrorLocked(c.sendAlert(alertDecodeError)) + } + // Handshake messages are not allowed to fragment across the CCS. + if c.hand.Len() > 0 { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + // In TLS 1.3, change_cipher_spec records are ignored until the + // Finished. See RFC 8446, Appendix D.4. Note that according to Section + // 5, a server can send a ChangeCipherSpec before its ServerHello, when + // c.vers is still unset. That's not useful though and suspicious if the + // server then selects a lower protocol version, so don't allow that. + if c.vers == VersionTLS13 && !handshakeComplete { + return c.retryReadRecord(expectChangeCipherSpec) + } + if !expectChangeCipherSpec { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + if err := c.in.changeCipherSpec(); err != nil { + return c.in.setErrorLocked(c.sendAlert(err.(alert))) + } + + case recordTypeApplicationData: + if !handshakeComplete || expectChangeCipherSpec { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + // Some OpenSSL servers send empty records in order to randomize the + // CBC IV. Ignore a limited number of empty records. + if len(data) == 0 { + return c.retryReadRecord(expectChangeCipherSpec) + } + // Note that data is owned by c.rawInput, following the Next call above, + // to avoid copying the plaintext. This is safe because c.rawInput is + // not read from or written to until c.input is drained. + c.input.Reset(data) + + case recordTypeHandshake: + if len(data) == 0 || expectChangeCipherSpec { + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + c.hand.Write(data) + } + + return nil +} + +// retryReadRecord recurs into readRecordOrCCS to drop a non-advancing record, like +// a warning alert, empty application_data, or a change_cipher_spec in TLS 1.3. +func (c *Conn) retryReadRecord(expectChangeCipherSpec bool) error { + c.retryCount++ + if c.retryCount > maxUselessRecords { + c.sendAlert(alertUnexpectedMessage) + return c.in.setErrorLocked(errors.New("tls: too many ignored records")) + } + return c.readRecordOrCCS(expectChangeCipherSpec) +} + +// atLeastReader reads from R, stopping with EOF once at least N bytes have been +// read. It is different from an io.LimitedReader in that it doesn't cut short +// the last Read call, and in that it considers an early EOF an error. +type atLeastReader struct { + R io.Reader + N int64 +} + +func (r *atLeastReader) Read(p []byte) (int, error) { + if r.N <= 0 { + return 0, io.EOF + } + n, err := r.R.Read(p) + r.N -= int64(n) // won't underflow unless len(p) >= n > 9223372036854775809 + if r.N > 0 && err == io.EOF { + return n, io.ErrUnexpectedEOF + } + if r.N <= 0 && err == nil { + return n, io.EOF + } + return n, err +} + +// readFromUntil reads from r into c.rawInput until c.rawInput contains +// at least n bytes or else returns an error. +func (c *Conn) readFromUntil(r io.Reader, n int) error { + if c.rawInput.Len() >= n { + return nil + } + needs := n - c.rawInput.Len() + // There might be extra input waiting on the wire. Make a best effort + // attempt to fetch it so that it can be used in (*Conn).Read to + // "predict" closeNotify alerts. + c.rawInput.Grow(needs + bytes.MinRead) + _, err := c.rawInput.ReadFrom(&atLeastReader{r, int64(needs)}) + return err +} + +// sendAlertLocked sends a TLS alert message. +func (c *Conn) sendAlertLocked(err alert) error { + if c.quic != nil { + return c.out.setErrorLocked(&net.OpError{Op: "local error", Err: err}) + } + + switch err { + case alertNoRenegotiation, alertCloseNotify: + c.tmp[0] = alertLevelWarning + default: + c.tmp[0] = alertLevelError + } + c.tmp[1] = byte(err) + + _, writeErr := c.writeRecordLocked(recordTypeAlert, c.tmp[0:2]) + if err == alertCloseNotify { + // closeNotify is a special case in that it isn't an error. + return writeErr + } + + return c.out.setErrorLocked(&net.OpError{Op: "local error", Err: err}) +} + +// sendAlert sends a TLS alert message. +func (c *Conn) sendAlert(err alert) error { + c.out.Lock() + defer c.out.Unlock() + return c.sendAlertLocked(err) +} + +const ( + // tcpMSSEstimate is a conservative estimate of the TCP maximum segment + // size (MSS). A constant is used, rather than querying the kernel for + // the actual MSS, to avoid complexity. The value here is the IPv6 + // minimum MTU (1280 bytes) minus the overhead of an IPv6 header (40 + // bytes) and a TCP header with timestamps (32 bytes). + tcpMSSEstimate = 1208 + + // recordSizeBoostThreshold is the number of bytes of application data + // sent after which the TLS record size will be increased to the + // maximum. + recordSizeBoostThreshold = 128 * 1024 +) + +// maxPayloadSizeForWrite returns the maximum TLS payload size to use for the +// next application data record. There is the following trade-off: +// +// - For latency-sensitive applications, such as web browsing, each TLS +// record should fit in one TCP segment. +// - For throughput-sensitive applications, such as large file transfers, +// larger TLS records better amortize framing and encryption overheads. +// +// A simple heuristic that works well in practice is to use small records for +// the first 1MB of data, then use larger records for subsequent data, and +// reset back to smaller records after the connection becomes idle. See "High +// Performance Web Networking", Chapter 4, or: +// https://www.igvita.com/2013/10/24/optimizing-tls-record-size-and-buffering-latency/ +// +// In the interests of simplicity and determinism, this code does not attempt +// to reset the record size once the connection is idle, however. +func (c *Conn) maxPayloadSizeForWrite(typ recordType) int { + if c.config.DynamicRecordSizingDisabled || typ != recordTypeApplicationData { + return maxPlaintext + } + + if c.bytesSent >= recordSizeBoostThreshold { + return maxPlaintext + } + + // Subtract TLS overheads to get the maximum payload size. + payloadBytes := tcpMSSEstimate - recordHeaderLen - c.out.explicitNonceLen() + if c.out.cipher != nil { + switch ciph := c.out.cipher.(type) { + case cipher.Stream: + payloadBytes -= c.out.mac.Size() + case cipher.AEAD: + payloadBytes -= ciph.Overhead() + case cbcMode: + blockSize := ciph.BlockSize() + // The payload must fit in a multiple of blockSize, with + // room for at least one padding byte. + payloadBytes = (payloadBytes & ^(blockSize - 1)) - 1 + // The MAC is appended before padding so affects the + // payload size directly. + payloadBytes -= c.out.mac.Size() + default: + panic("unknown cipher type") + } + } + if c.vers == VersionTLS13 { + payloadBytes-- // encrypted ContentType + } + + // Allow packet growth in arithmetic progression up to max. + pkt := c.packetsSent + c.packetsSent++ + if pkt > 1000 { + return maxPlaintext // avoid overflow in multiply below + } + + n := payloadBytes * int(pkt+1) + if n > maxPlaintext { + n = maxPlaintext + } + return n +} + +func (c *Conn) write(data []byte) (int, error) { + if c.buffering { + c.sendBuf = append(c.sendBuf, data...) + return len(data), nil + } + + n, err := c.conn.Write(data) + c.bytesSent += int64(n) + return n, err +} + +func (c *Conn) flush() (int, error) { + if len(c.sendBuf) == 0 { + return 0, nil + } + + n, err := c.conn.Write(c.sendBuf) + c.bytesSent += int64(n) + c.sendBuf = nil + c.buffering = false + return n, err +} + +// outBufPool pools the record-sized scratch buffers used by writeRecordLocked. +var outBufPool = sync.Pool{ + New: func() any { + return new([]byte) + }, +} + +// writeRecordLocked writes a TLS record with the given type and payload to the +// connection and updates the record layer state. +func (c *Conn) writeRecordLocked(typ recordType, data []byte) (int, error) { + if c.quic != nil { + if typ != recordTypeHandshake { + return 0, errors.New("tls: internal error: sending non-handshake message to QUIC transport") + } + c.quicWriteCryptoData(c.out.level, data) + if !c.buffering { + if _, err := c.flush(); err != nil { + return 0, err + } + } + return len(data), nil + } + + outBufPtr := outBufPool.Get().(*[]byte) + outBuf := *outBufPtr + defer func() { + // You might be tempted to simplify this by just passing &outBuf to Put, + // but that would make the local copy of the outBuf slice header escape + // to the heap, causing an allocation. Instead, we keep around the + // pointer to the slice header returned by Get, which is already on the + // heap, and overwrite and return that. + *outBufPtr = outBuf + outBufPool.Put(outBufPtr) + }() + + var n int + for len(data) > 0 { + m := len(data) + if maxPayload := c.maxPayloadSizeForWrite(typ); m > maxPayload { + m = maxPayload + } + + _, outBuf = sliceForAppend(outBuf[:0], recordHeaderLen) + outBuf[0] = byte(typ) + vers := c.vers + if vers == 0 { + // Some TLS servers fail if the record version is + // greater than TLS 1.0 for the initial ClientHello. + vers = VersionTLS10 + } else if vers == VersionTLS13 { + // TLS 1.3 froze the record layer version to 1.2. + // See RFC 8446, Section 5.1. + vers = VersionTLS12 + } + outBuf[1] = byte(vers >> 8) + outBuf[2] = byte(vers) + outBuf[3] = byte(m >> 8) + outBuf[4] = byte(m) + + var err error + outBuf, err = c.out.encrypt(outBuf, data[:m], c.config.rand()) + if err != nil { + return n, err + } + if _, err := c.write(outBuf); err != nil { + return n, err + } + n += m + data = data[m:] + } + + if typ == recordTypeChangeCipherSpec && c.vers != VersionTLS13 { + if err := c.out.changeCipherSpec(); err != nil { + return n, c.sendAlertLocked(err.(alert)) + } + } + + return n, nil +} + +// writeHandshakeRecord writes a handshake message to the connection and updates +// the record layer state. If transcript is non-nil the marshaled message is +// written to it. +func (c *Conn) writeHandshakeRecord(msg handshakeMessage, transcript transcriptHash) (int, error) { + c.out.Lock() + defer c.out.Unlock() + + data, err := msg.marshal() + if err != nil { + return 0, err + } + if transcript != nil { + transcript.Write(data) + } + + return c.writeRecordLocked(recordTypeHandshake, data) +} + +// writeChangeCipherRecord writes a ChangeCipherSpec message to the connection and +// updates the record layer state. +func (c *Conn) writeChangeCipherRecord() error { + c.out.Lock() + defer c.out.Unlock() + _, err := c.writeRecordLocked(recordTypeChangeCipherSpec, []byte{1}) + return err +} + +// readHandshakeBytes reads handshake data until c.hand contains at least n bytes. +func (c *Conn) readHandshakeBytes(n int) error { + if c.quic != nil { + return c.quicReadHandshakeBytes(n) + } + for c.hand.Len() < n { + if err := c.readRecord(); err != nil { + return err + } + } + return nil +} + +// readHandshake reads the next handshake message from +// the record layer. If transcript is non-nil, the message +// is written to the passed transcriptHash. +func (c *Conn) readHandshake(transcript transcriptHash) (any, error) { + if err := c.readHandshakeBytes(4); err != nil { + return nil, err + } + data := c.hand.Bytes() + + maxHandshakeSize := maxHandshake + // hasVers indicates we're past the first message, forcing someone trying to + // make us just allocate a large buffer to at least do the initial part of + // the handshake first. + if c.haveVers && data[0] == typeCertificate { + // Since certificate messages are likely to be the only messages that + // can be larger than maxHandshake, we use a special limit for just + // those messages. + maxHandshakeSize = maxHandshakeCertificateMsg + } + + n := int(data[1])<<16 | int(data[2])<<8 | int(data[3]) + if n > maxHandshakeSize { + c.sendAlertLocked(alertInternalError) + return nil, c.in.setErrorLocked(fmt.Errorf("tls: handshake message of length %d bytes exceeds maximum of %d bytes", n, maxHandshakeSize)) + } + if err := c.readHandshakeBytes(4 + n); err != nil { + return nil, err + } + data = c.hand.Next(4 + n) + return c.unmarshalHandshakeMessage(data, transcript) +} + +func (c *Conn) unmarshalHandshakeMessage(data []byte, transcript transcriptHash) (handshakeMessage, error) { + var m handshakeMessage + switch data[0] { + case typeHelloRequest: + m = new(helloRequestMsg) + case typeClientHello: + m = new(clientHelloMsg) + case typeServerHello: + m = new(serverHelloMsg) + case typeNewSessionTicket: + if c.vers == VersionTLS13 { + m = new(newSessionTicketMsgTLS13) + } else { + m = new(newSessionTicketMsg) + } + case typeCertificate: + if c.vers == VersionTLS13 { + m = new(certificateMsgTLS13) + } else { + m = new(certificateMsg) + } + case typeCertificateRequest: + if c.vers == VersionTLS13 { + m = new(certificateRequestMsgTLS13) + } else { + m = &certificateRequestMsg{ + hasSignatureAlgorithm: c.vers >= VersionTLS12, + } + } + case typeCertificateStatus: + m = new(certificateStatusMsg) + case typeServerKeyExchange: + m = new(serverKeyExchangeMsg) + case typeServerHelloDone: + m = new(serverHelloDoneMsg) + case typeClientKeyExchange: + m = new(clientKeyExchangeMsg) + case typeCertificateVerify: + m = &certificateVerifyMsg{ + hasSignatureAlgorithm: c.vers >= VersionTLS12, + } + case typeFinished: + m = new(finishedMsg) + // [uTLS] Commented typeEncryptedExtensions to force + // utlsHandshakeMessageType to handle it + // case typeEncryptedExtensions: + // m = new(encryptedExtensionsMsg) + case typeEndOfEarlyData: + m = new(endOfEarlyDataMsg) + case typeKeyUpdate: + m = new(keyUpdateMsg) + default: + // [UTLS SECTION BEGINS] + var err error + m, err = c.utlsHandshakeMessageType(data[0]) // see u_conn.go + if err == nil { + break + } + // [UTLS SECTION ENDS] + return nil, c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + + // The handshake message unmarshalers + // expect to be able to keep references to data, + // so pass in a fresh copy that won't be overwritten. + data = append([]byte(nil), data...) + + if !m.unmarshal(data) { + return nil, c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } + + if transcript != nil { + transcript.Write(data) + } + + return m, nil +} + +var ( + errShutdown = errors.New("tls: protocol is shutdown") +) + +// Write writes data to the connection. +// +// As Write calls [Conn.Handshake], in order to prevent indefinite blocking a deadline +// must be set for both [Conn.Read] and Write before Write is called when the handshake +// has not yet completed. See [Conn.SetDeadline], [Conn.SetReadDeadline], and +// [Conn.SetWriteDeadline]. +func (c *Conn) Write(b []byte) (int, error) { + // interlock with Close below + for { + x := c.activeCall.Load() + if x&1 != 0 { + return 0, net.ErrClosed + } + if c.activeCall.CompareAndSwap(x, x+2) { + break + } + } + defer c.activeCall.Add(-2) + + if err := c.Handshake(); err != nil { + return 0, err + } + + c.out.Lock() + defer c.out.Unlock() + + if err := c.out.err; err != nil { + return 0, err + } + + if !c.isHandshakeComplete.Load() { + return 0, alertInternalError + } + + if c.closeNotifySent { + return 0, errShutdown + } + + // TLS 1.0 is susceptible to a chosen-plaintext + // attack when using block mode ciphers due to predictable IVs. + // This can be prevented by splitting each Application Data + // record into two records, effectively randomizing the IV. + // + // https://www.openssl.org/~bodo/tls-cbc.txt + // https://bugzilla.mozilla.org/show_bug.cgi?id=665814 + // https://www.imperialviolet.org/2012/01/15/beastfollowup.html + + var m int + if len(b) > 1 && c.vers == VersionTLS10 { + if _, ok := c.out.cipher.(cipher.BlockMode); ok { + n, err := c.writeRecordLocked(recordTypeApplicationData, b[:1]) + if err != nil { + return n, c.out.setErrorLocked(err) + } + m, b = 1, b[1:] + } + } + + n, err := c.writeRecordLocked(recordTypeApplicationData, b) + return n + m, c.out.setErrorLocked(err) +} + +// handleRenegotiation processes a HelloRequest handshake message. +func (c *Conn) handleRenegotiation() error { + if c.vers == VersionTLS13 { + return errors.New("tls: internal error: unexpected renegotiation") + } + + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + + helloReq, ok := msg.(*helloRequestMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(helloReq, msg) + } + + if !c.isClient { + return c.sendAlert(alertNoRenegotiation) + } + + switch c.config.Renegotiation { + case RenegotiateNever: + return c.sendAlert(alertNoRenegotiation) + case RenegotiateOnceAsClient: + if c.handshakes > 1 { + return c.sendAlert(alertNoRenegotiation) + } + case RenegotiateFreelyAsClient: + // Ok. + default: + c.sendAlert(alertInternalError) + return errors.New("tls: unknown Renegotiation value") + } + + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + + c.isHandshakeComplete.Store(false) + if c.handshakeErr = c.clientHandshake(context.Background()); c.handshakeErr == nil { + c.handshakes++ + } + return c.handshakeErr +} + +// handlePostHandshakeMessage processes a handshake message arrived after the +// handshake is complete. Up to TLS 1.2, it indicates the start of a renegotiation. +func (c *Conn) handlePostHandshakeMessage() error { + if c.vers != VersionTLS13 { + return c.handleRenegotiation() + } + + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + c.retryCount++ + if c.retryCount > maxUselessRecords { + c.sendAlert(alertUnexpectedMessage) + return c.in.setErrorLocked(errors.New("tls: too many non-advancing records")) + } + + switch msg := msg.(type) { + case *newSessionTicketMsgTLS13: + return c.handleNewSessionTicket(msg) + case *keyUpdateMsg: + return c.handleKeyUpdate(msg) + } + // The QUIC layer is supposed to treat an unexpected post-handshake CertificateRequest + // as a QUIC-level PROTOCOL_VIOLATION error (RFC 9001, Section 4.4). Returning an + // unexpected_message alert here doesn't provide it with enough information to distinguish + // this condition from other unexpected messages. This is probably fine. + c.sendAlert(alertUnexpectedMessage) + return fmt.Errorf("tls: received unexpected handshake message of type %T", msg) +} + +func (c *Conn) handleKeyUpdate(keyUpdate *keyUpdateMsg) error { + if c.quic != nil { + c.sendAlert(alertUnexpectedMessage) + return c.in.setErrorLocked(errors.New("tls: received unexpected key update message")) + } + + cipherSuite := cipherSuiteTLS13ByID(c.cipherSuite) + if cipherSuite == nil { + return c.in.setErrorLocked(c.sendAlert(alertInternalError)) + } + + newSecret := cipherSuite.nextTrafficSecret(c.in.trafficSecret) + c.in.setTrafficSecret(cipherSuite, QUICEncryptionLevelInitial, newSecret) + + if keyUpdate.updateRequested { + c.out.Lock() + defer c.out.Unlock() + + msg := &keyUpdateMsg{} + msgBytes, err := msg.marshal() + if err != nil { + return err + } + _, err = c.writeRecordLocked(recordTypeHandshake, msgBytes) + if err != nil { + // Surface the error at the next write. + c.out.setErrorLocked(err) + return nil + } + + newSecret := cipherSuite.nextTrafficSecret(c.out.trafficSecret) + c.out.setTrafficSecret(cipherSuite, QUICEncryptionLevelInitial, newSecret) + } + + return nil +} + +// Read reads data from the connection. +// +// As Read calls [Conn.Handshake], in order to prevent indefinite blocking a deadline +// must be set for both Read and [Conn.Write] before Read is called when the handshake +// has not yet completed. See [Conn.SetDeadline], [Conn.SetReadDeadline], and +// [Conn.SetWriteDeadline]. +func (c *Conn) Read(b []byte) (int, error) { + if err := c.Handshake(); err != nil { + return 0, err + } + if len(b) == 0 { + // Put this after Handshake, in case people were calling + // Read(nil) for the side effect of the Handshake. + return 0, nil + } + + c.in.Lock() + defer c.in.Unlock() + + for c.input.Len() == 0 { + if err := c.readRecord(); err != nil { + return 0, err + } + for c.hand.Len() > 0 { + if err := c.handlePostHandshakeMessage(); err != nil { + return 0, err + } + } + } + + n, _ := c.input.Read(b) + + // If a close-notify alert is waiting, read it so that we can return (n, + // EOF) instead of (n, nil), to signal to the HTTP response reading + // goroutine that the connection is now closed. This eliminates a race + // where the HTTP response reading goroutine would otherwise not observe + // the EOF until its next read, by which time a client goroutine might + // have already tried to reuse the HTTP connection for a new request. + // See https://golang.org/cl/76400046 and https://golang.org/issue/3514 + if n != 0 && c.input.Len() == 0 && c.rawInput.Len() > 0 && + recordType(c.rawInput.Bytes()[0]) == recordTypeAlert { + if err := c.readRecord(); err != nil { + return n, err // will be io.EOF on closeNotify + } + } + + return n, nil +} + +// Close closes the connection. +func (c *Conn) Close() error { + // Interlock with Conn.Write above. + var x int32 + for { + x = c.activeCall.Load() + if x&1 != 0 { + return net.ErrClosed + } + if c.activeCall.CompareAndSwap(x, x|1) { + break + } + } + if x != 0 { + // io.Writer and io.Closer should not be used concurrently. + // If Close is called while a Write is currently in-flight, + // interpret that as a sign that this Close is really just + // being used to break the Write and/or clean up resources and + // avoid sending the alertCloseNotify, which may block + // waiting on handshakeMutex or the c.out mutex. + return c.conn.Close() + } + + var alertErr error + if c.isHandshakeComplete.Load() { + if err := c.closeNotify(); err != nil { + alertErr = fmt.Errorf("tls: failed to send closeNotify alert (but connection was closed anyway): %w", err) + } + } + + if err := c.conn.Close(); err != nil { + return err + } + return alertErr +} + +var errEarlyCloseWrite = errors.New("tls: CloseWrite called before handshake complete") + +// CloseWrite shuts down the writing side of the connection. It should only be +// called once the handshake has completed and does not call CloseWrite on the +// underlying connection. Most callers should just use [Conn.Close]. +func (c *Conn) CloseWrite() error { + if !c.isHandshakeComplete.Load() { + return errEarlyCloseWrite + } + + return c.closeNotify() +} + +func (c *Conn) closeNotify() error { + c.out.Lock() + defer c.out.Unlock() + + if !c.closeNotifySent { + // Set a Write Deadline to prevent possibly blocking forever. + c.SetWriteDeadline(time.Now().Add(time.Second * 5)) + c.closeNotifyErr = c.sendAlertLocked(alertCloseNotify) + c.closeNotifySent = true + // Any subsequent writes will fail. + c.SetWriteDeadline(time.Now()) + } + return c.closeNotifyErr +} + +// Handshake runs the client or server handshake +// protocol if it has not yet been run. +// +// Most uses of this package need not call Handshake explicitly: the +// first [Conn.Read] or [Conn.Write] will call it automatically. +// +// For control over canceling or setting a timeout on a handshake, use +// [Conn.HandshakeContext] or the [Dialer]'s DialContext method instead. +// +// In order to avoid denial of service attacks, the maximum RSA key size allowed +// in certificates sent by either the TLS server or client is limited to 8192 +// bits. This limit can be overridden by setting tlsmaxrsasize in the GODEBUG +// environment variable (e.g. GODEBUG=tlsmaxrsasize=4096). +func (c *Conn) Handshake() error { + return c.HandshakeContext(context.Background()) +} + +// HandshakeContext runs the client or server handshake +// protocol if it has not yet been run. +// +// The provided Context must be non-nil. If the context is canceled before +// the handshake is complete, the handshake is interrupted and an error is returned. +// Once the handshake has completed, cancellation of the context will not affect the +// connection. +// +// Most uses of this package need not call HandshakeContext explicitly: the +// first [Conn.Read] or [Conn.Write] will call it automatically. +func (c *Conn) HandshakeContext(ctx context.Context) error { + // Delegate to unexported method for named return + // without confusing documented signature. + return c.handshakeContext(ctx) +} + +func (c *Conn) handshakeContext(ctx context.Context) (ret error) { + // Fast sync/atomic-based exit if there is no handshake in flight and the + // last one succeeded without an error. Avoids the expensive context setup + // and mutex for most Read and Write calls. + if c.isHandshakeComplete.Load() { + return nil + } + + handshakeCtx, cancel := context.WithCancel(ctx) + // Note: defer this before starting the "interrupter" goroutine + // so that we can tell the difference between the input being canceled and + // this cancellation. In the former case, we need to close the connection. + defer cancel() + + if c.quic != nil { + c.quic.cancelc = handshakeCtx.Done() + c.quic.cancel = cancel + } else if ctx.Done() != nil { + // Start the "interrupter" goroutine, if this context might be canceled. + // (The background context cannot). + // + // The interrupter goroutine waits for the input context to be done and + // closes the connection if this happens before the function returns. + done := make(chan struct{}) + interruptRes := make(chan error, 1) + defer func() { + close(done) + if ctxErr := <-interruptRes; ctxErr != nil { + // Return context error to user. + ret = ctxErr + } + }() + go func() { + select { + case <-handshakeCtx.Done(): + // Close the connection, discarding the error + _ = c.conn.Close() + interruptRes <- handshakeCtx.Err() + case <-done: + interruptRes <- nil + } + }() + } + + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + + if err := c.handshakeErr; err != nil { + return err + } + if c.isHandshakeComplete.Load() { + return nil + } + + c.in.Lock() + defer c.in.Unlock() + + c.handshakeErr = c.handshakeFn(handshakeCtx) + if c.handshakeErr == nil { + c.handshakes++ + } else { + // If an error occurred during the handshake try to flush the + // alert that might be left in the buffer. + c.flush() + } + + if c.handshakeErr == nil && !c.isHandshakeComplete.Load() { + c.handshakeErr = errors.New("tls: internal error: handshake should have had a result") + } + if c.handshakeErr != nil && c.isHandshakeComplete.Load() { + panic("tls: internal error: handshake returned an error but is marked successful") + } + + if c.quic != nil { + if c.handshakeErr == nil { + c.quicHandshakeComplete() + // Provide the 1-RTT read secret now that the handshake is complete. + // The QUIC layer MUST NOT decrypt 1-RTT packets prior to completing + // the handshake (RFC 9001, Section 5.7). + c.quicSetReadSecret(QUICEncryptionLevelApplication, c.cipherSuite, c.in.trafficSecret) + } else { + var a alert + c.out.Lock() + if !errors.As(c.out.err, &a) { + a = alertInternalError + } + c.out.Unlock() + // Return an error which wraps both the handshake error and + // any alert error we may have sent, or alertInternalError + // if we didn't send an alert. + // Truncate the text of the alert to 0 characters. + c.handshakeErr = fmt.Errorf("%w%.0w", c.handshakeErr, AlertError(a)) + } + close(c.quic.blockedc) + close(c.quic.signalc) + } + + return c.handshakeErr +} + +// ConnectionState returns basic TLS details about the connection. +func (c *Conn) ConnectionState() ConnectionState { + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + return c.connectionStateLocked() +} + +// var tlsunsafeekm = godebug.New("tlsunsafeekm") // [uTLS] unsupportted + +func (c *Conn) connectionStateLocked() ConnectionState { + var state ConnectionState + state.HandshakeComplete = c.isHandshakeComplete.Load() + state.Version = c.vers + state.NegotiatedProtocol = c.clientProtocol + state.DidResume = c.didResume + state.testingOnlyDidHRR = c.didHRR + // c.curveID is not set on TLS 1.0–1.2 resumptions. Fix that before exposing it. + state.testingOnlyCurveID = c.curveID + state.NegotiatedProtocolIsMutual = true + state.ServerName = c.serverName + state.CipherSuite = c.cipherSuite + state.PeerCertificates = c.peerCertificates + state.VerifiedChains = c.verifiedChains + state.SignedCertificateTimestamps = c.scts + state.OCSPResponse = c.ocspResponse + if (!c.didResume || c.extMasterSecret) && c.vers != VersionTLS13 { + if c.clientFinishedIsFirst { + state.TLSUnique = c.clientFinished[:] + } else { + state.TLSUnique = c.serverFinished[:] + } + } + if c.config.Renegotiation != RenegotiateNever { + state.ekm = noEKMBecauseRenegotiation + } else if c.vers != VersionTLS13 && !c.extMasterSecret { + state.ekm = func(label string, context []byte, length int) ([]byte, error) { + // [uTLS SECTION START] + // Disabling unsupported godebug package + // if tlsunsafeekm.Value() == "1" { + // tlsunsafeekm.IncNonDefault() + // return c.ekm(label, context, length) + // } + // [uTLS SECTION END] + return noEKMBecauseNoEMS(label, context, length) + } + } else { + state.ekm = c.ekm + } + state.ECHAccepted = c.echAccepted + // [UTLS SECTION START] + c.utlsConnectionStateLocked(&state) + // [UTLS SECTION END] + return state +} + +// OCSPResponse returns the stapled OCSP response from the TLS server, if +// any. (Only valid for client connections.) +func (c *Conn) OCSPResponse() []byte { + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + + return c.ocspResponse +} + +// VerifyHostname checks that the peer certificate chain is valid for +// connecting to host. If so, it returns nil; if not, it returns an error +// describing the problem. +func (c *Conn) VerifyHostname(host string) error { + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + if !c.isClient { + return errors.New("tls: VerifyHostname called on TLS server connection") + } + if !c.isHandshakeComplete.Load() { + return errors.New("tls: handshake has not yet been performed") + } + if len(c.verifiedChains) == 0 { + return errors.New("tls: handshake did not verify certificate chain") + } + return c.peerCertificates[0].VerifyHostname(host) +} diff --git a/backend/vendor/github.com/refraction-networking/utls/defaults.go b/backend/vendor/github.com/refraction-networking/utls/defaults.go new file mode 100644 index 0000000..f36b6c4 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/defaults.go @@ -0,0 +1,140 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "slices" + _ "unsafe" // for linkname +) + +// Defaults are collected in this file to allow distributions to more easily patch +// them to apply local policies. + +// var tlsmlkem = godebug.New("tlsmlkem") [uTLS] + +// defaultCurvePreferences is the default set of supported key exchanges, as +// well as the preference order. +func defaultCurvePreferences() []CurveID { + // [uTLS section begins] + // if tlsmlkem.Value() == "0" { + // return []CurveID{X25519, CurveP256, CurveP384, CurveP521} + // } + // [uTLS section ends] + + return []CurveID{X25519MLKEM768, X25519, CurveP256, CurveP384, CurveP521} +} + +// defaultSupportedSignatureAlgorithms contains the signature and hash algorithms that +// the code advertises as supported in a TLS 1.2+ ClientHello and in a TLS 1.2+ +// CertificateRequest. The two fields are merged to match with TLS 1.3. +// Note that in TLS 1.2, the ECDSA algorithms are not constrained to P-256, etc. +var defaultSupportedSignatureAlgorithms = []SignatureScheme{ + PSSWithSHA256, + ECDSAWithP256AndSHA256, + Ed25519, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA512, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + PKCS1WithSHA1, + ECDSAWithSHA1, +} + +// [uTLS section begins] +// var tlsrsakex = godebug.New("tlsrsakex") +// var tls3des = godebug.New("tls3des") +// [uTLS section ends] + +func defaultCipherSuites() []uint16 { + suites := slices.Clone(cipherSuitesPreferenceOrder) + return slices.DeleteFunc(suites, func(c uint16) bool { + return disabledCipherSuites[c] || + // [uTLS section begins] + // tlsrsakex.Value() != "1" && rsaKexCiphers[c] || + // tls3des.Value() != "1" && tdesCiphers[c] + rsaKexCiphers[c] || + tdesCiphers[c] + // [uTLS section ends] + }) +} + +// defaultCipherSuitesTLS13 is also the preference order, since there are no +// disabled by default TLS 1.3 cipher suites. The same AES vs ChaCha20 logic as +// cipherSuitesPreferenceOrder applies. +// +// defaultCipherSuitesTLS13 should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/quic-go/quic-go +// - github.com/sagernet/quic-go +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname defaultCipherSuitesTLS13 +var defaultCipherSuitesTLS13 = []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, +} + +// defaultCipherSuitesTLS13NoAES should be an internal detail, +// but widely used packages access it using linkname. +// Notable members of the hall of shame include: +// - github.com/quic-go/quic-go +// - github.com/sagernet/quic-go +// +// Do not remove or change the type signature. +// See go.dev/issue/67401. +// +//go:linkname defaultCipherSuitesTLS13NoAES +var defaultCipherSuitesTLS13NoAES = []uint16{ + TLS_CHACHA20_POLY1305_SHA256, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, +} + +// The FIPS-only policies below match BoringSSL's +// ssl_compliance_policy_fips_202205, which is based on NIST SP 800-52r2. +// https://cs.opensource.google/boringssl/boringssl/+/master:ssl/ssl_lib.cc;l=3289;drc=ea7a88fa + +var defaultSupportedVersionsFIPS = []uint16{ + VersionTLS12, + VersionTLS13, +} + +// defaultCurvePreferencesFIPS are the FIPS-allowed curves, +// in preference order (most preferable first). +var defaultCurvePreferencesFIPS = []CurveID{CurveP256, CurveP384} + +// defaultSupportedSignatureAlgorithmsFIPS currently are a subset of +// defaultSupportedSignatureAlgorithms without Ed25519 and SHA-1. +var defaultSupportedSignatureAlgorithmsFIPS = []SignatureScheme{ + PSSWithSHA256, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + ECDSAWithP256AndSHA256, + PKCS1WithSHA384, + ECDSAWithP384AndSHA384, + PKCS1WithSHA512, +} + +// defaultCipherSuitesFIPS are the FIPS-allowed cipher suites. +var defaultCipherSuitesFIPS = []uint16{ + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, +} + +// defaultCipherSuitesTLS13FIPS are the FIPS-allowed cipher suites for TLS 1.3. +var defaultCipherSuitesTLS13FIPS = []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/LICENSE b/backend/vendor/github.com/refraction-networking/utls/dicttls/LICENSE new file mode 100644 index 0000000..6b3bea4 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/LICENSE @@ -0,0 +1,28 @@ +BSD 3-Clause License + +Copyright (c) 2023, Gaukas Wang + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + +1. Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. + +2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + +3. Neither the name of the copyright holder nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE +FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, +OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/README.md b/backend/vendor/github.com/refraction-networking/utls/dicttls/README.md new file mode 100644 index 0000000..7a26134 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/README.md @@ -0,0 +1,12 @@ +# Dict TLS + +This is a vendored version of [godicttls](https://github.com/gaukas/godicttls) + +Below is a copy of the original README.md + +# godicttls +Dictionary for TLS written in Go providing bidirectional mapping values to their names, plus enum convenience for values. + +Last Update with data fetched from [IANA](www.iana.org) in March 2023: +- Transport Layer Security (TLS) Parameters [link](https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml) +- Transport Layer Security (TLS) Extensions [link](https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml) \ No newline at end of file diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/alerts.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/alerts.go new file mode 100644 index 0000000..ec1f4e7 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/alerts.go @@ -0,0 +1,118 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-6 +// last updated: March 2023 + +const ( + Alert_close_notify uint8 = 0 + Alert_unexpected_message uint8 = 10 + Alert_bad_record_mac uint8 = 20 + Alert_decryption_failed uint8 = 21 + Alert_record_overflow uint8 = 22 + Alert_decompression_failure uint8 = 30 + Alert_handshake_failure uint8 = 40 + Alert_no_certificate uint8 = 41 + Alert_bad_certificate uint8 = 42 + Alert_unsupported_certificate uint8 = 43 + Alert_certificate_revoked uint8 = 44 + Alert_certificate_expired uint8 = 45 + Alert_certificate_unknown uint8 = 46 + Alert_illegal_parameter uint8 = 47 + Alert_unknown_ca uint8 = 48 + Alert_access_denied uint8 = 49 + Alert_decode_error uint8 = 50 + Alert_decrypt_error uint8 = 51 + Alert_too_many_cids_requested uint8 = 52 + Alert_export_restriction uint8 = 60 + Alert_protocol_version uint8 = 70 + Alert_insufficient_security uint8 = 71 + Alert_internal_error uint8 = 80 + Alert_inappropriate_fallback uint8 = 86 + Alert_user_canceled uint8 = 90 + Alert_no_renegotiation uint8 = 100 + Alert_missing_extension uint8 = 109 + Alert_unsupported_extension uint8 = 110 + Alert_certificate_unobtainable uint8 = 111 + Alert_unrecognized_name uint8 = 112 + Alert_bad_certificate_status_response uint8 = 113 + Alert_bad_certificate_hash_value uint8 = 114 + Alert_unknown_psk_identity uint8 = 115 + Alert_certificate_required uint8 = 116 + Alert_no_application_protocol uint8 = 120 +) + +var DictAlertValueIndexed = map[uint8]string{ + 0: "close_notify", + 10: "unexpected_message", + 20: "bad_record_mac", + 21: "decryption_failed", + 22: "record_overflow", + 30: "decompression_failure", + 40: "handshake_failure", + 41: "no_certificate", + 42: "bad_certificate", + 43: "unsupported_certificate", + 44: "certificate_revoked", + 45: "certificate_expired", + 46: "certificate_unknown", + 47: "illegal_parameter", + 48: "unknown_ca", + 49: "access_denied", + 50: "decode_error", + 51: "decrypt_error", + 52: "too_many_cids_requested", + 60: "export_restriction", + 70: "protocol_version", + 71: "insufficient_security", + 80: "internal_error", + 86: "inappropriate_fallback", + 90: "user_canceled", + 100: "no_renegotiation", + 109: "missing_extension", + 110: "unsupported_extension", + 111: "certificate_unobtainable", + 112: "unrecognized_name", + 113: "bad_certificate_status_response", + 114: "bad_certificate_hash_value", + 115: "unknown_psk_identity", + 116: "certificate_required", + 120: "no_application_protocol", +} + +var DictAlertNameIndexed = map[string]uint8{ + "close_notify": 0, + "unexpected_message": 10, + "bad_record_mac": 20, + "decryption_failed": 21, + "record_overflow": 22, + "decompression_failure": 30, + "handshake_failure": 40, + "no_certificate": 41, + "bad_certificate": 42, + "unsupported_certificate": 43, + "certificate_revoked": 44, + "certificate_expired": 45, + "certificate_unknown": 46, + "illegal_parameter": 47, + "unknown_ca": 48, + "access_denied": 49, + "decode_error": 50, + "decrypt_error": 51, + "too_many_cids_requested": 52, + "export_restriction": 60, + "protocol_version": 70, + "insufficient_security": 71, + "internal_error": 80, + "inappropriate_fallback": 86, + "user_canceled": 90, + "no_renegotiation": 100, + "missing_extension": 109, + "unsupported_extension": 110, + "certificate_unobtainable": 111, + "unrecognized_name": 112, + "bad_certificate_status_response": 113, + "bad_certificate_hash_value": 114, + "unknown_psk_identity": 115, + "certificate_required": 116, + "no_application_protocol": 120, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/authorization_data_formats.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/authorization_data_formats.go new file mode 100644 index 0000000..5a1847e --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/authorization_data_formats.go @@ -0,0 +1,35 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#authorization-data +// last updated: March 2023 + +const ( + AuthData_x509_attr_cert uint16 = 0 + AuthData_saml_assertion uint16 = 1 + AuthData_x509_attr_cert_url uint16 = 2 + AuthData_saml_assertion_url uint16 = 3 + AuthData_keynote_assertion_list uint16 = 64 + AuthData_keynote_assertion_list_url uint16 = 65 + AuthData_dtcp_authorization uint16 = 66 +) + +var DictAuthorizationDataFormatValueIndexed = map[uint16]string{ + 0: "x509_attr_cert", + 1: "saml_assertion", + 2: "x509_attr_cert_url", + 3: "saml_assertion_url", + 64: "keynote_assertion_list", + 65: "keynote_assertion_list_url", + 66: "dtcp_authorization", +} + +var DictAuthorizationDataFormatNameIndexed = map[string]uint16{ + "x509_attr_cert": 0, + "saml_assertion": 1, + "x509_attr_cert_url": 2, + "saml_assertion_url": 3, + "Unassigned": 0, + "keynote_assertion_list": 64, + "keynote_assertion_list_url": 65, + "dtcp_authorization": 66, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/cachedinformationtype_values.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/cachedinformationtype_values.go new file mode 100644 index 0000000..8e1469b --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/cachedinformationtype_values.go @@ -0,0 +1,19 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#cachedinformationtype +// last updated: March 2023 + +const ( + CachedInformationType_cert uint8 = 1 + CachedInformationType_cert_req uint8 = 2 +) + +var DictCachedInformationTypeValueIndexed = map[uint8]string{ + 1: "cert", + 2: "cert_req", +} + +var DictCachedInformationTypeNameIndexed = map[string]uint8{ + "cert": 1, + "cert_req": 2, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/certificate_compression_algorithm_ids.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/certificate_compression_algorithm_ids.go new file mode 100644 index 0000000..e5ffca3 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/certificate_compression_algorithm_ids.go @@ -0,0 +1,22 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#tls-certificate-compression-algorithm-ids +// last updated: March 2023 + +const ( + CertCompAlg_zlib uint16 = 1 + CertCompAlg_brotli uint16 = 2 + CertCompAlg_zstd uint16 = 3 +) + +var DictCertificateCompressionAlgorithmValueIndexed = map[uint16]string{ + 1: "zlib", + 2: "brotli", + 3: "zstd", +} + +var DictCertificateCompressionAlgorithmNameIndexed = map[string]uint16{ + "zlib": 1, + "brotli": 2, + "zstd": 3, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/certificate_status_types.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/certificate_status_types.go new file mode 100644 index 0000000..67e0285 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/certificate_status_types.go @@ -0,0 +1,19 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#certificate-status +// last updated: March 2023 + +const ( + CertStatusType_ocsp uint8 = 1 + CertStatusType_ocsp_multi uint8 = 2 +) + +var DictCertificateStatusTypeValueIndexed = map[uint8]string{ + 1: "ocsp", + 2: "ocsp_multi", +} + +var DictCertificateStatusTypeNameIndexed = map[string]uint8{ + "ocsp": 1, + "ocsp_multi": 2, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/certificte_types.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/certificte_types.go new file mode 100644 index 0000000..93a3285 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/certificte_types.go @@ -0,0 +1,25 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#tls-extensiontype-values-3 +// last updated: March 2023 + +const ( + CertType_X509 uint8 = 0 + CertType_OpenPGP uint8 = 1 + CertType_Raw_Public_Key uint8 = 2 + CertType_1609Dot2 uint8 = 3 +) + +var DictCertificateTypeValueIndexed = map[uint8]string{ + 0: "X509", + 1: "OpenPGP", + 2: "Raw Public Key", + 3: "1609Dot2", +} + +var DictCertificateTypeNameIndexed = map[string]uint8{ + "X509": 0, + "OpenPGP": 1, + "Raw Public Key": 2, + "1609Dot2": 3, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/cipher_suites.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/cipher_suites.go new file mode 100644 index 0000000..d787521 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/cipher_suites.go @@ -0,0 +1,1084 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-4 +// last updated: March 2023 + +const ( + TLS_NULL_WITH_NULL_NULL uint16 = 0x0000 + TLS_RSA_WITH_NULL_MD5 uint16 = 0x0001 + TLS_RSA_WITH_NULL_SHA uint16 = 0x0002 + TLS_RSA_EXPORT_WITH_RC4_40_MD5 uint16 = 0x0003 + TLS_RSA_WITH_RC4_128_MD5 uint16 = 0x0004 + TLS_RSA_WITH_RC4_128_SHA uint16 = 0x0005 + TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5 uint16 = 0x0006 + TLS_RSA_WITH_IDEA_CBC_SHA uint16 = 0x0007 + TLS_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0008 + TLS_RSA_WITH_DES_CBC_SHA uint16 = 0x0009 + TLS_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x000A + TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x000B + TLS_DH_DSS_WITH_DES_CBC_SHA uint16 = 0x000C + TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0x000D + TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x000E + TLS_DH_RSA_WITH_DES_CBC_SHA uint16 = 0x000F + TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x0010 + TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0011 + TLS_DHE_DSS_WITH_DES_CBC_SHA uint16 = 0x0012 + TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0x0013 + TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0014 + TLS_DHE_RSA_WITH_DES_CBC_SHA uint16 = 0x0015 + TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0x0016 + TLS_DH_anon_EXPORT_WITH_RC4_40_MD5 uint16 = 0x0017 + TLS_DH_anon_WITH_RC4_128_MD5 uint16 = 0x0018 + TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA uint16 = 0x0019 + TLS_DH_anon_WITH_DES_CBC_SHA uint16 = 0x001A + TLS_DH_anon_WITH_3DES_EDE_CBC_SHA uint16 = 0x001B + + TLS_KRB5_WITH_DES_CBC_SHA uint16 = 0x001E + TLS_KRB5_WITH_3DES_EDE_CBC_SHA uint16 = 0x001F + TLS_KRB5_WITH_RC4_128_SHA uint16 = 0x0020 + TLS_KRB5_WITH_IDEA_CBC_SHA uint16 = 0x0021 + TLS_KRB5_WITH_DES_CBC_MD5 uint16 = 0x0022 + TLS_KRB5_WITH_3DES_EDE_CBC_MD5 uint16 = 0x0023 + TLS_KRB5_WITH_RC4_128_MD5 uint16 = 0x0024 + TLS_KRB5_WITH_IDEA_CBC_MD5 uint16 = 0x0025 + TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA uint16 = 0x0026 + TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA uint16 = 0x0027 + TLS_KRB5_EXPORT_WITH_RC4_40_SHA uint16 = 0x0028 + TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5 uint16 = 0x0029 + TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5 uint16 = 0x002A + TLS_KRB5_EXPORT_WITH_RC4_40_MD5 uint16 = 0x002B + TLS_PSK_WITH_NULL_SHA uint16 = 0x002C + TLS_DHE_PSK_WITH_NULL_SHA uint16 = 0x002D + TLS_RSA_PSK_WITH_NULL_SHA uint16 = 0x002E + TLS_RSA_WITH_AES_128_CBC_SHA uint16 = 0x002F + TLS_DH_DSS_WITH_AES_128_CBC_SHA uint16 = 0x0030 + TLS_DH_RSA_WITH_AES_128_CBC_SHA uint16 = 0x0031 + TLS_DHE_DSS_WITH_AES_128_CBC_SHA uint16 = 0x0032 + TLS_DHE_RSA_WITH_AES_128_CBC_SHA uint16 = 0x0033 + TLS_DH_anon_WITH_AES_128_CBC_SHA uint16 = 0x0034 + TLS_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0035 + TLS_DH_DSS_WITH_AES_256_CBC_SHA uint16 = 0x0036 + TLS_DH_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0037 + TLS_DHE_DSS_WITH_AES_256_CBC_SHA uint16 = 0x0038 + TLS_DHE_RSA_WITH_AES_256_CBC_SHA uint16 = 0x0039 + TLS_DH_anon_WITH_AES_256_CBC_SHA uint16 = 0x003A + TLS_RSA_WITH_NULL_SHA256 uint16 = 0x003B + TLS_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x003C + TLS_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x003D + TLS_DH_DSS_WITH_AES_128_CBC_SHA256 uint16 = 0x003E + TLS_DH_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x003F + TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 uint16 = 0x0040 + TLS_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0041 + TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0042 + TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0043 + TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0044 + TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0045 + TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA uint16 = 0x0046 + + TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0x0067 + TLS_DH_DSS_WITH_AES_256_CBC_SHA256 uint16 = 0x0068 + TLS_DH_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x0069 + TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 uint16 = 0x006A + TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 uint16 = 0x006B + TLS_DH_anon_WITH_AES_128_CBC_SHA256 uint16 = 0x006C + TLS_DH_anon_WITH_AES_256_CBC_SHA256 uint16 = 0x006D + + TLS_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0084 + TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0085 + TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0086 + TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0087 + TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0088 + TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA uint16 = 0x0089 + TLS_PSK_WITH_RC4_128_SHA uint16 = 0x008A + TLS_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x008B + TLS_PSK_WITH_AES_128_CBC_SHA uint16 = 0x008C + TLS_PSK_WITH_AES_256_CBC_SHA uint16 = 0x008D + TLS_DHE_PSK_WITH_RC4_128_SHA uint16 = 0x008E + TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x008F + TLS_DHE_PSK_WITH_AES_128_CBC_SHA uint16 = 0x0090 + TLS_DHE_PSK_WITH_AES_256_CBC_SHA uint16 = 0x0091 + TLS_RSA_PSK_WITH_RC4_128_SHA uint16 = 0x0092 + TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0x0093 + TLS_RSA_PSK_WITH_AES_128_CBC_SHA uint16 = 0x0094 + TLS_RSA_PSK_WITH_AES_256_CBC_SHA uint16 = 0x0095 + TLS_RSA_WITH_SEED_CBC_SHA uint16 = 0x0096 + TLS_DH_DSS_WITH_SEED_CBC_SHA uint16 = 0x0097 + TLS_DH_RSA_WITH_SEED_CBC_SHA uint16 = 0x0098 + TLS_DHE_DSS_WITH_SEED_CBC_SHA uint16 = 0x0099 + TLS_DHE_RSA_WITH_SEED_CBC_SHA uint16 = 0x009A + TLS_DH_anon_WITH_SEED_CBC_SHA uint16 = 0x009B + TLS_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x009C + TLS_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x009D + TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x009E + TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x009F + TLS_DH_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0x00A0 + TLS_DH_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0x00A1 + TLS_DHE_DSS_WITH_AES_128_GCM_SHA256 uint16 = 0x00A2 + TLS_DHE_DSS_WITH_AES_256_GCM_SHA384 uint16 = 0x00A3 + TLS_DH_DSS_WITH_AES_128_GCM_SHA256 uint16 = 0x00A4 + TLS_DH_DSS_WITH_AES_256_GCM_SHA384 uint16 = 0x00A5 + TLS_DH_anon_WITH_AES_128_GCM_SHA256 uint16 = 0x00A6 + TLS_DH_anon_WITH_AES_256_GCM_SHA384 uint16 = 0x00A7 + TLS_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00A8 + TLS_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00A9 + TLS_DHE_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00AA + TLS_DHE_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00AB + TLS_RSA_PSK_WITH_AES_128_GCM_SHA256 uint16 = 0x00AC + TLS_RSA_PSK_WITH_AES_256_GCM_SHA384 uint16 = 0x00AD + TLS_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00AE + TLS_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00AF + TLS_PSK_WITH_NULL_SHA256 uint16 = 0x00B0 + TLS_PSK_WITH_NULL_SHA384 uint16 = 0x00B1 + TLS_DHE_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00B2 + TLS_DHE_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00B3 + TLS_DHE_PSK_WITH_NULL_SHA256 uint16 = 0x00B4 + TLS_DHE_PSK_WITH_NULL_SHA384 uint16 = 0x00B5 + TLS_RSA_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0x00B6 + TLS_RSA_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0x00B7 + TLS_RSA_PSK_WITH_NULL_SHA256 uint16 = 0x00B8 + TLS_RSA_PSK_WITH_NULL_SHA384 uint16 = 0x00B9 + TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BA + TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BB + TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BC + TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BD + TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BE + TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0x00BF + TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C0 + TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C1 + TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C2 + TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C3 + TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C4 + TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256 uint16 = 0x00C5 + TLS_SM4_GCM_SM3 uint16 = 0x00C6 + TLS_SM4_CCM_SM3 uint16 = 0x00C7 + + TLS_EMPTY_RENEGOTIATION_INFO_SCSV uint16 = 0x00FF + + TLS_AES_128_GCM_SHA256 uint16 = 0x1301 + TLS_AES_256_GCM_SHA384 uint16 = 0x1302 + TLS_CHACHA20_POLY1305_SHA256 uint16 = 0x1303 + TLS_AES_128_CCM_SHA256 uint16 = 0x1304 + TLS_AES_128_CCM_8_SHA256 uint16 = 0x1305 + TLS_AEGIS_256_SHA384 uint16 = 0x1306 + TLS_AEGIS_128L_SHA256 uint16 = 0x1307 + + TLS_FALLBACK_SCSV uint16 = 0x5600 + + TLS_ECDH_ECDSA_WITH_NULL_SHA uint16 = 0xC001 + TLS_ECDH_ECDSA_WITH_RC4_128_SHA uint16 = 0xC002 + TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC003 + TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA uint16 = 0xC004 + TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA uint16 = 0xC005 + TLS_ECDHE_ECDSA_WITH_NULL_SHA uint16 = 0xC006 + TLS_ECDHE_ECDSA_WITH_RC4_128_SHA uint16 = 0xC007 + TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC008 + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA uint16 = 0xC009 + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA uint16 = 0xC00A + TLS_ECDH_RSA_WITH_NULL_SHA uint16 = 0xC00B + TLS_ECDH_RSA_WITH_RC4_128_SHA uint16 = 0xC00C + TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC00D + TLS_ECDH_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC00E + TLS_ECDH_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC00F + TLS_ECDHE_RSA_WITH_NULL_SHA uint16 = 0xC010 + TLS_ECDHE_RSA_WITH_RC4_128_SHA uint16 = 0xC011 + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC012 + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC013 + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC014 + TLS_ECDH_anon_WITH_NULL_SHA uint16 = 0xC015 + TLS_ECDH_anon_WITH_RC4_128_SHA uint16 = 0xC016 + TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA uint16 = 0xC017 + TLS_ECDH_anon_WITH_AES_128_CBC_SHA uint16 = 0xC018 + TLS_ECDH_anon_WITH_AES_256_CBC_SHA uint16 = 0xC019 + TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01A + TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01B + TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA uint16 = 0xC01C + TLS_SRP_SHA_WITH_AES_128_CBC_SHA uint16 = 0xC01D + TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA uint16 = 0xC01E + TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA uint16 = 0xC01F + TLS_SRP_SHA_WITH_AES_256_CBC_SHA uint16 = 0xC020 + TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA uint16 = 0xC021 + TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA uint16 = 0xC022 + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC023 + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC024 + TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC025 + TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC026 + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC027 + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC028 + TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 uint16 = 0xC029 + TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 uint16 = 0xC02A + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02B + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC02C + TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02D + TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC02E + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC02F + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC030 + TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256 uint16 = 0xC031 + TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384 uint16 = 0xC032 + TLS_ECDHE_PSK_WITH_RC4_128_SHA uint16 = 0xC033 + TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA uint16 = 0xC034 + TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA uint16 = 0xC035 + TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA uint16 = 0xC036 + TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256 uint16 = 0xC037 + TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384 uint16 = 0xC038 + TLS_ECDHE_PSK_WITH_NULL_SHA uint16 = 0xC039 + TLS_ECDHE_PSK_WITH_NULL_SHA256 uint16 = 0xC03A + TLS_ECDHE_PSK_WITH_NULL_SHA384 uint16 = 0xC03B + TLS_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC03C + TLS_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC03D + TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC03E + TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC03F + TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC040 + TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC041 + TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC042 + TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC043 + TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC044 + TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC045 + TLS_DH_anon_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC046 + TLS_DH_anon_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC047 + TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC048 + TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC049 + TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04A + TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04B + TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04C + TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04D + TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC04E + TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC04F + TLS_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC050 + TLS_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC051 + TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC052 + TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC053 + TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC054 + TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC055 + TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC056 + TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC057 + TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC058 + TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC059 + TLS_DH_anon_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05A + TLS_DH_anon_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05B + TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05C + TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05D + TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC05E + TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC05F + TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC060 + TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC061 + TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC062 + TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC063 + TLS_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC064 + TLS_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC065 + TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC066 + TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC067 + TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC068 + TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC069 + TLS_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06A + TLS_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06B + TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06C + TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06D + TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256 uint16 = 0xC06E + TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384 uint16 = 0xC06F + TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256 uint16 = 0xC070 + TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384 uint16 = 0xC071 + TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC072 + TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC073 + TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC074 + TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC075 + TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC076 + TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC077 + TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC078 + TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC079 + TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07A + TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07B + TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07C + TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07D + TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC07E + TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC07F + TLS_DHE_DSS_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC080 + TLS_DHE_DSS_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC081 + TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC082 + TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC083 + TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC084 + TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC085 + TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC086 + TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC087 + TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC088 + TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC089 + TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08A + TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08B + TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08C + TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08D + TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC08E + TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC08F + TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC090 + TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC091 + TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256 uint16 = 0xC092 + TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384 uint16 = 0xC093 + TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC094 + TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC095 + TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC096 + TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC097 + TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC098 + TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC099 + TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256 uint16 = 0xC09A + TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384 uint16 = 0xC09B + TLS_RSA_WITH_AES_128_CCM uint16 = 0xC09C + TLS_RSA_WITH_AES_256_CCM uint16 = 0xC09D + TLS_DHE_RSA_WITH_AES_128_CCM uint16 = 0xC09E + TLS_DHE_RSA_WITH_AES_256_CCM uint16 = 0xC09F + TLS_RSA_WITH_AES_128_CCM_8 uint16 = 0xC0A0 + TLS_RSA_WITH_AES_256_CCM_8 uint16 = 0xC0A1 + TLS_DHE_RSA_WITH_AES_128_CCM_8 uint16 = 0xC0A2 + TLS_DHE_RSA_WITH_AES_256_CCM_8 uint16 = 0xC0A3 + TLS_PSK_WITH_AES_128_CCM uint16 = 0xC0A4 + TLS_PSK_WITH_AES_256_CCM uint16 = 0xC0A5 + TLS_DHE_PSK_WITH_AES_128_CCM uint16 = 0xC0A6 + TLS_DHE_PSK_WITH_AES_256_CCM uint16 = 0xC0A7 + TLS_PSK_WITH_AES_128_CCM_8 uint16 = 0xC0A8 + TLS_PSK_WITH_AES_256_CCM_8 uint16 = 0xC0A9 + TLS_PSK_DHE_WITH_AES_128_CCM_8 uint16 = 0xC0AA + TLS_PSK_DHE_WITH_AES_256_CCM_8 uint16 = 0xC0AB + TLS_ECDHE_ECDSA_WITH_AES_128_CCM uint16 = 0xC0AC + TLS_ECDHE_ECDSA_WITH_AES_256_CCM uint16 = 0xC0AD + TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8 uint16 = 0xC0AE + TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8 uint16 = 0xC0AF + TLS_ECCPWD_WITH_AES_128_GCM_SHA256 uint16 = 0xC0B0 + TLS_ECCPWD_WITH_AES_256_GCM_SHA384 uint16 = 0xC0B1 + TLS_ECCPWD_WITH_AES_128_CCM_SHA256 uint16 = 0xC0B2 + TLS_ECCPWD_WITH_AES_256_CCM_SHA384 uint16 = 0xC0B3 + TLS_SHA256_SHA256 uint16 = 0xC0B4 + TLS_SHA384_SHA384 uint16 = 0xC0B5 + + TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC uint16 = 0xC100 + TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC uint16 = 0xC101 + TLS_GOSTR341112_256_WITH_28147_CNT_IMIT uint16 = 0xC102 + TLS_GOSTR341112_256_WITH_KUZNYECHIK_MGM_L uint16 = 0xC103 +) + +var DictCipherSuiteValueIndexed = map[uint16]string{ + 0x0000: "TLS_NULL_WITH_NULL_NULL", + 0x0001: "TLS_RSA_WITH_NULL_MD5", + 0x0002: "TLS_RSA_WITH_NULL_SHA", + 0x0003: "TLS_RSA_EXPORT_WITH_RC4_40_MD5", + 0x0004: "TLS_RSA_WITH_RC4_128_MD5", + 0x0005: "TLS_RSA_WITH_RC4_128_SHA", + 0x0006: "TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5", + 0x0007: "TLS_RSA_WITH_IDEA_CBC_SHA", + 0x0008: "TLS_RSA_EXPORT_WITH_DES40_CBC_SHA", + 0x0009: "TLS_RSA_WITH_DES_CBC_SHA", + 0x000A: "TLS_RSA_WITH_3DES_EDE_CBC_SHA", + 0x000B: "TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA", + 0x000C: "TLS_DH_DSS_WITH_DES_CBC_SHA", + 0x000D: "TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA", + 0x000E: "TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA", + 0x000F: "TLS_DH_RSA_WITH_DES_CBC_SHA", + 0x0010: "TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA", + 0x0011: "TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA", + 0x0012: "TLS_DHE_DSS_WITH_DES_CBC_SHA", + 0x0013: "TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA", + 0x0014: "TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA", + 0x0015: "TLS_DHE_RSA_WITH_DES_CBC_SHA", + 0x0016: "TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA", + 0x0017: "TLS_DH_anon_EXPORT_WITH_RC4_40_MD5", + 0x0018: "TLS_DH_anon_WITH_RC4_128_MD5", + 0x0019: "TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA", + 0x001A: "TLS_DH_anon_WITH_DES_CBC_SHA", + 0x001B: "TLS_DH_anon_WITH_3DES_EDE_CBC_SHA", + + 0x001E: "TLS_KRB5_WITH_DES_CBC_SHA", + 0x001F: "TLS_KRB5_WITH_3DES_EDE_CBC_SHA", + 0x0020: "TLS_KRB5_WITH_RC4_128_SHA", + 0x0021: "TLS_KRB5_WITH_IDEA_CBC_SHA", + 0x0022: "TLS_KRB5_WITH_DES_CBC_MD5", + 0x0023: "TLS_KRB5_WITH_3DES_EDE_CBC_MD5", + 0x0024: "TLS_KRB5_WITH_RC4_128_MD5", + 0x0025: "TLS_KRB5_WITH_IDEA_CBC_MD5", + 0x0026: "TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA", + 0x0027: "TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA", + 0x0028: "TLS_KRB5_EXPORT_WITH_RC4_40_SHA", + 0x0029: "TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5", + 0x002A: "TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5", + 0x002B: "TLS_KRB5_EXPORT_WITH_RC4_40_MD5", + 0x002C: "TLS_PSK_WITH_NULL_SHA", + 0x002D: "TLS_DHE_PSK_WITH_NULL_SHA", + 0x002E: "TLS_RSA_PSK_WITH_NULL_SHA", + 0x002F: "TLS_RSA_WITH_AES_128_CBC_SHA", + 0x0030: "TLS_DH_DSS_WITH_AES_128_CBC_SHA", + 0x0031: "TLS_DH_RSA_WITH_AES_128_CBC_SHA", + 0x0032: "TLS_DHE_DSS_WITH_AES_128_CBC_SHA", + 0x0033: "TLS_DHE_RSA_WITH_AES_128_CBC_SHA", + 0x0034: "TLS_DH_anon_WITH_AES_128_CBC_SHA", + 0x0035: "TLS_RSA_WITH_AES_256_CBC_SHA", + 0x0036: "TLS_DH_DSS_WITH_AES_256_CBC_SHA", + 0x0037: "TLS_DH_RSA_WITH_AES_256_CBC_SHA", + 0x0038: "TLS_DHE_DSS_WITH_AES_256_CBC_SHA", + 0x0039: "TLS_DHE_RSA_WITH_AES_256_CBC_SHA", + 0x003A: "TLS_DH_anon_WITH_AES_256_CBC_SHA", + 0x003B: "TLS_RSA_WITH_NULL_SHA256", + 0x003C: "TLS_RSA_WITH_AES_128_CBC_SHA256", + 0x003D: "TLS_RSA_WITH_AES_256_CBC_SHA256", + 0x003E: "TLS_DH_DSS_WITH_AES_128_CBC_SHA256", + 0x003F: "TLS_DH_RSA_WITH_AES_128_CBC_SHA256", + 0x0040: "TLS_DHE_DSS_WITH_AES_128_CBC_SHA256", + 0x0041: "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA", + 0x0042: "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA", + 0x0043: "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA", + 0x0044: "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA", + 0x0045: "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA", + 0x0046: "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA", + + 0x0067: "TLS_DHE_RSA_WITH_AES_128_CBC_SHA256", + 0x0068: "TLS_DH_DSS_WITH_AES_256_CBC_SHA256", + 0x0069: "TLS_DH_RSA_WITH_AES_256_CBC_SHA256", + 0x006A: "TLS_DHE_DSS_WITH_AES_256_CBC_SHA256", + 0x006B: "TLS_DHE_RSA_WITH_AES_256_CBC_SHA256", + 0x006C: "TLS_DH_anon_WITH_AES_128_CBC_SHA256", + 0x006D: "TLS_DH_anon_WITH_AES_256_CBC_SHA256", + + 0x0084: "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA", + 0x0085: "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA", + 0x0086: "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA", + 0x0087: "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA", + 0x0088: "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA", + 0x0089: "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA", + 0x008A: "TLS_PSK_WITH_RC4_128_SHA", + 0x008B: "TLS_PSK_WITH_3DES_EDE_CBC_SHA", + 0x008C: "TLS_PSK_WITH_AES_128_CBC_SHA", + 0x008D: "TLS_PSK_WITH_AES_256_CBC_SHA", + 0x008E: "TLS_DHE_PSK_WITH_RC4_128_SHA", + 0x008F: "TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA", + 0x0090: "TLS_DHE_PSK_WITH_AES_128_CBC_SHA", + 0x0091: "TLS_DHE_PSK_WITH_AES_256_CBC_SHA", + 0x0092: "TLS_RSA_PSK_WITH_RC4_128_SHA", + 0x0093: "TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA", + 0x0094: "TLS_RSA_PSK_WITH_AES_128_CBC_SHA", + 0x0095: "TLS_RSA_PSK_WITH_AES_256_CBC_SHA", + 0x0096: "TLS_RSA_WITH_SEED_CBC_SHA", + 0x0097: "TLS_DH_DSS_WITH_SEED_CBC_SHA", + 0x0098: "TLS_DH_RSA_WITH_SEED_CBC_SHA", + 0x0099: "TLS_DHE_DSS_WITH_SEED_CBC_SHA", + 0x009A: "TLS_DHE_RSA_WITH_SEED_CBC_SHA", + 0x009B: "TLS_DH_anon_WITH_SEED_CBC_SHA", + 0x009C: "TLS_RSA_WITH_AES_128_GCM_SHA256", + 0x009D: "TLS_RSA_WITH_AES_256_GCM_SHA384", + 0x009E: "TLS_DHE_RSA_WITH_AES_128_GCM_SHA256", + 0x009F: "TLS_DHE_RSA_WITH_AES_256_GCM_SHA384", + 0x00A0: "TLS_DH_RSA_WITH_AES_128_GCM_SHA256", + 0x00A1: "TLS_DH_RSA_WITH_AES_256_GCM_SHA384", + 0x00A2: "TLS_DHE_DSS_WITH_AES_128_GCM_SHA256", + 0x00A3: "TLS_DHE_DSS_WITH_AES_256_GCM_SHA384", + 0x00A4: "TLS_DH_DSS_WITH_AES_128_GCM_SHA256", + 0x00A5: "TLS_DH_DSS_WITH_AES_256_GCM_SHA384", + 0x00A6: "TLS_DH_anon_WITH_AES_128_GCM_SHA256", + 0x00A7: "TLS_DH_anon_WITH_AES_256_GCM_SHA384", + 0x00A8: "TLS_PSK_WITH_AES_128_GCM_SHA256", + 0x00A9: "TLS_PSK_WITH_AES_256_GCM_SHA384", + 0x00AA: "TLS_DHE_PSK_WITH_AES_128_GCM_SHA256", + 0x00AB: "TLS_DHE_PSK_WITH_AES_256_GCM_SHA384", + 0x00AC: "TLS_RSA_PSK_WITH_AES_128_GCM_SHA256", + 0x00AD: "TLS_RSA_PSK_WITH_AES_256_GCM_SHA384", + 0x00AE: "TLS_PSK_WITH_AES_128_CBC_SHA256", + 0x00AF: "TLS_PSK_WITH_AES_256_CBC_SHA384", + 0x00B0: "TLS_PSK_WITH_NULL_SHA256", + 0x00B1: "TLS_PSK_WITH_NULL_SHA384", + 0x00B2: "TLS_DHE_PSK_WITH_AES_128_CBC_SHA256", + 0x00B3: "TLS_DHE_PSK_WITH_AES_256_CBC_SHA384", + 0x00B4: "TLS_DHE_PSK_WITH_NULL_SHA256", + 0x00B5: "TLS_DHE_PSK_WITH_NULL_SHA384", + 0x00B6: "TLS_RSA_PSK_WITH_AES_128_CBC_SHA256", + 0x00B7: "TLS_RSA_PSK_WITH_AES_256_CBC_SHA384", + 0x00B8: "TLS_RSA_PSK_WITH_NULL_SHA256", + 0x00B9: "TLS_RSA_PSK_WITH_NULL_SHA384", + 0x00BA: "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256", + 0x00BB: "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256", + 0x00BC: "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256", + 0x00BD: "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256", + 0x00BE: "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256", + 0x00BF: "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256", + 0x00C0: "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C1: "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C2: "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C3: "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C4: "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C5: "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256", + 0x00C6: "TLS_SM4_GCM_SM3", + 0x00C7: "TLS_SM4_CCM_SM3", + + 0x00FF: "TLS_EMPTY_RENEGOTIATION_INFO_SCSV", + + 0x1301: "TLS_AES_128_GCM_SHA256", + 0x1302: "TLS_AES_256_GCM_SHA384", + 0x1303: "TLS_CHACHA20_POLY1305_SHA256", + 0x1304: "TLS_AES_128_CCM_SHA256", + 0x1305: "TLS_AES_128_CCM_8_SHA256", + 0x1306: "TLS_AEGIS_256_SHA384", + 0x1307: "TLS_AEGIS_128L_SHA256", + + 0x5600: "TLS_FALLBACK_SCSV", + + 0xC001: "TLS_ECDH_ECDSA_WITH_NULL_SHA", + 0xC002: "TLS_ECDH_ECDSA_WITH_RC4_128_SHA", + 0xC003: "TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA", + 0xC004: "TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA", + 0xC005: "TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA", + 0xC006: "TLS_ECDHE_ECDSA_WITH_NULL_SHA", + 0xC007: "TLS_ECDHE_ECDSA_WITH_RC4_128_SHA", + 0xC008: "TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA", + 0xC009: "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA", + 0xC00A: "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA", + 0xC00B: "TLS_ECDH_RSA_WITH_NULL_SHA", + 0xC00C: "TLS_ECDH_RSA_WITH_RC4_128_SHA", + 0xC00D: "TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA", + 0xC00E: "TLS_ECDH_RSA_WITH_AES_128_CBC_SHA", + 0xC00F: "TLS_ECDH_RSA_WITH_AES_256_CBC_SHA", + 0xC010: "TLS_ECDHE_RSA_WITH_NULL_SHA", + 0xC011: "TLS_ECDHE_RSA_WITH_RC4_128_SHA", + 0xC012: "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA", + 0xC013: "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA", + 0xC014: "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA", + 0xC015: "TLS_ECDH_anon_WITH_NULL_SHA", + 0xC016: "TLS_ECDH_anon_WITH_RC4_128_SHA", + 0xC017: "TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA", + 0xC018: "TLS_ECDH_anon_WITH_AES_128_CBC_SHA", + 0xC019: "TLS_ECDH_anon_WITH_AES_256_CBC_SHA", + 0xC01A: "TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA", + 0xC01B: "TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA", + 0xC01C: "TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA", + 0xC01D: "TLS_SRP_SHA_WITH_AES_128_CBC_SHA", + 0xC01E: "TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA", + 0xC01F: "TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA", + 0xC020: "TLS_SRP_SHA_WITH_AES_256_CBC_SHA", + 0xC021: "TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA", + 0xC022: "TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA", + 0xC023: "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256", + 0xC024: "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384", + 0xC025: "TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256", + 0xC026: "TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384", + 0xC027: "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256", + 0xC028: "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384", + 0xC029: "TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256", + 0xC02A: "TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384", + 0xC02B: "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256", + 0xC02C: "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384", + 0xC02D: "TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256", + 0xC02E: "TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384", + 0xC02F: "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256", + 0xC030: "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384", + 0xC031: "TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256", + 0xC032: "TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384", + 0xC033: "TLS_ECDHE_PSK_WITH_RC4_128_SHA", + 0xC034: "TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA", + 0xC035: "TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA", + 0xC036: "TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA", + 0xC037: "TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256", + 0xC038: "TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384", + 0xC039: "TLS_ECDHE_PSK_WITH_NULL_SHA", + 0xC03A: "TLS_ECDHE_PSK_WITH_NULL_SHA256", + 0xC03B: "TLS_ECDHE_PSK_WITH_NULL_SHA384", + 0xC03C: "TLS_RSA_WITH_ARIA_128_CBC_SHA256", + 0xC03D: "TLS_RSA_WITH_ARIA_256_CBC_SHA384", + 0xC03E: "TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256", + 0xC03F: "TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384", + 0xC040: "TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256", + 0xC041: "TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384", + 0xC042: "TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256", + 0xC043: "TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384", + 0xC044: "TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256", + 0xC045: "TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384", + 0xC046: "TLS_DH_anon_WITH_ARIA_128_CBC_SHA256", + 0xC047: "TLS_DH_anon_WITH_ARIA_256_CBC_SHA384", + 0xC048: "TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256", + 0xC049: "TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384", + 0xC04A: "TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256", + 0xC04B: "TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384", + 0xC04C: "TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256", + 0xC04D: "TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384", + 0xC04E: "TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256", + 0xC04F: "TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384", + 0xC050: "TLS_RSA_WITH_ARIA_128_GCM_SHA256", + 0xC051: "TLS_RSA_WITH_ARIA_256_GCM_SHA384", + 0xC052: "TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256", + 0xC053: "TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384", + 0xC054: "TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256", + 0xC055: "TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384", + 0xC056: "TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256", + 0xC057: "TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384", + 0xC058: "TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256", + 0xC059: "TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384", + 0xC05A: "TLS_DH_anon_WITH_ARIA_128_GCM_SHA256", + 0xC05B: "TLS_DH_anon_WITH_ARIA_256_GCM_SHA384", + 0xC05C: "TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256", + 0xC05D: "TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384", + 0xC05E: "TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256", + 0xC05F: "TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384", + 0xC060: "TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256", + 0xC061: "TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384", + 0xC062: "TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256", + 0xC063: "TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384", + 0xC064: "TLS_PSK_WITH_ARIA_128_CBC_SHA256", + 0xC065: "TLS_PSK_WITH_ARIA_256_CBC_SHA384", + 0xC066: "TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256", + 0xC067: "TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384", + 0xC068: "TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256", + 0xC069: "TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384", + 0xC06A: "TLS_PSK_WITH_ARIA_128_GCM_SHA256", + 0xC06B: "TLS_PSK_WITH_ARIA_256_GCM_SHA384", + 0xC06C: "TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256", + 0xC06D: "TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384", + 0xC06E: "TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256", + 0xC06F: "TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384", + 0xC070: "TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256", + 0xC071: "TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384", + 0xC072: "TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256", + 0xC073: "TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384", + 0xC074: "TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256", + 0xC075: "TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384", + 0xC076: "TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256", + 0xC077: "TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384", + 0xC078: "TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256", + 0xC079: "TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384", + 0xC07A: "TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC07B: "TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC07C: "TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC07D: "TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC07E: "TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC07F: "TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC080: "TLS_DHE_DSS_WITH_CAMELLIA_128_GCM_SHA256", + 0xC081: "TLS_DHE_DSS_WITH_CAMELLIA_256_GCM_SHA384", + 0xC082: "TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256", + 0xC083: "TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384", + 0xC084: "TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256", + 0xC085: "TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384", + 0xC086: "TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC087: "TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC088: "TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC089: "TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC08A: "TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC08B: "TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC08C: "TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256", + 0xC08D: "TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384", + 0xC08E: "TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256", + 0xC08F: "TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384", + 0xC090: "TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256", + 0xC091: "TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384", + 0xC092: "TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256", + 0xC093: "TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384", + 0xC094: "TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256", + 0xC095: "TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384", + 0xC096: "TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256", + 0xC097: "TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384", + 0xC098: "TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256", + 0xC099: "TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384", + 0xC09A: "TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256", + 0xC09B: "TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384", + 0xC09C: "TLS_RSA_WITH_AES_128_CCM", + 0xC09D: "TLS_RSA_WITH_AES_256_CCM", + 0xC09E: "TLS_DHE_RSA_WITH_AES_128_CCM", + 0xC09F: "TLS_DHE_RSA_WITH_AES_256_CCM", + 0xC0A0: "TLS_RSA_WITH_AES_128_CCM_8", + 0xC0A1: "TLS_RSA_WITH_AES_256_CCM_8", + 0xC0A2: "TLS_DHE_RSA_WITH_AES_128_CCM_8", + 0xC0A3: "TLS_DHE_RSA_WITH_AES_256_CCM_8", + 0xC0A4: "TLS_PSK_WITH_AES_128_CCM", + 0xC0A5: "TLS_PSK_WITH_AES_256_CCM", + 0xC0A6: "TLS_DHE_PSK_WITH_AES_128_CCM", + 0xC0A7: "TLS_DHE_PSK_WITH_AES_256_CCM", + 0xC0A8: "TLS_PSK_WITH_AES_128_CCM_8", + 0xC0A9: "TLS_PSK_WITH_AES_256_CCM_8", + 0xC0AA: "TLS_PSK_DHE_WITH_AES_128_CCM_8", + 0xC0AB: "TLS_PSK_DHE_WITH_AES_256_CCM_8", + 0xC0AC: "TLS_ECDHE_ECDSA_WITH_AES_128_CCM", + 0xC0AD: "TLS_ECDHE_ECDSA_WITH_AES_256_CCM", + 0xC0AE: "TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8", + 0xC0AF: "TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8", + 0xC0B0: "TLS_ECCPWD_WITH_AES_128_GCM_SHA256", + 0xC0B1: "TLS_ECCPWD_WITH_AES_256_GCM_SHA384", + 0xC0B2: "TLS_ECCPWD_WITH_AES_128_CCM_SHA256", + 0xC0B3: "TLS_ECCPWD_WITH_AES_256_CCM_SHA384", + 0xC0B4: "TLS_SHA256_SHA256", + 0xC0B5: "TLS_SHA384_SHA384", + + 0xC100: "TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC", + 0xC101: "TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC", + 0xC102: "TLS_GOSTR341112_256_WITH_28147_CNT_IMIT", + 0xC103: "TLS_GOSTR341112_256_WITH_KUZNYECHIK_MGM_L", + 0xC104: "TLS_GOSTR341112_256_WITH_MAGMA_MGM_L", + 0xC105: "TLS_GOSTR341112_256_WITH_KUZNYECHIK_MGM_S", + 0xC106: "TLS_GOSTR341112_256_WITH_MAGMA_MGM_S", + + 0xCCA8: "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256", + 0xCCA9: "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256", + 0xCCAA: "TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256", + 0xCCAB: "TLS_PSK_WITH_CHACHA20_POLY1305_SHA256", + 0xCCAC: "TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256", + 0xCCAD: "TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256", + 0xCCAE: "TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256", + + 0xD001: "TLS_ECDHE_PSK_WITH_AES_128_GCM_SHA256", + 0xD002: "TLS_ECDHE_PSK_WITH_AES_256_GCM_SHA384", + 0xD003: "TLS_ECDHE_PSK_WITH_AES_128_CCM_8_SHA256", + 0xD005: "TLS_ECDHE_PSK_WITH_AES_128_CCM_SHA256", +} + +var DictCipherSuiteNameIndexed = map[string]uint16{ + "TLS_NULL_WITH_NULL_NULL": 0x0000, + "TLS_RSA_WITH_NULL_MD5": 0x0001, + "TLS_RSA_WITH_NULL_SHA": 0x0002, + "TLS_RSA_EXPORT_WITH_RC4_40_MD5": 0x0003, + "TLS_RSA_WITH_RC4_128_MD5": 0x0004, + "TLS_RSA_WITH_RC4_128_SHA": 0x0005, + "TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5": 0x0006, + "TLS_RSA_WITH_IDEA_CBC_SHA": 0x0007, + "TLS_RSA_EXPORT_WITH_DES40_CBC_SHA": 0x0008, + "TLS_RSA_WITH_DES_CBC_SHA": 0x0009, + "TLS_RSA_WITH_3DES_EDE_CBC_SHA": 0x000A, + "TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA": 0x000B, + "TLS_DH_DSS_WITH_DES_CBC_SHA": 0x000C, + "TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA": 0x000D, + "TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA": 0x000E, + "TLS_DH_RSA_WITH_DES_CBC_SHA": 0x000F, + "TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA": 0x0010, + "TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA": 0x0011, + "TLS_DHE_DSS_WITH_DES_CBC_SHA": 0x0012, + "TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA": 0x0013, + "TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA": 0x0014, + "TLS_DHE_RSA_WITH_DES_CBC_SHA": 0x0015, + "TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA": 0x0016, + "TLS_DH_anon_EXPORT_WITH_RC4_40_MD5": 0x0017, + "TLS_DH_anon_WITH_RC4_128_MD5": 0x0018, + "TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA": 0x0019, + "TLS_DH_anon_WITH_DES_CBC_SHA": 0x001A, + "TLS_DH_anon_WITH_3DES_EDE_CBC_SHA": 0x001B, + + "TLS_KRB5_WITH_DES_CBC_SHA": 0x001E, + "TLS_KRB5_WITH_3DES_EDE_CBC_SHA": 0x001F, + "TLS_KRB5_WITH_RC4_128_SHA": 0x0020, + "TLS_KRB5_WITH_IDEA_CBC_SHA": 0x0021, + "TLS_KRB5_WITH_DES_CBC_MD5": 0x0022, + "TLS_KRB5_WITH_3DES_EDE_CBC_MD5": 0x0023, + "TLS_KRB5_WITH_RC4_128_MD5": 0x0024, + "TLS_KRB5_WITH_IDEA_CBC_MD5": 0x0025, + "TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA": 0x0026, + "TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA": 0x0027, + "TLS_KRB5_EXPORT_WITH_RC4_40_SHA": 0x0028, + "TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5": 0x0029, + "TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5": 0x002A, + "TLS_KRB5_EXPORT_WITH_RC4_40_MD5": 0x002B, + "TLS_PSK_WITH_NULL_SHA": 0x002C, + "TLS_DHE_PSK_WITH_NULL_SHA": 0x002D, + "TLS_RSA_PSK_WITH_NULL_SHA": 0x002E, + "TLS_RSA_WITH_AES_128_CBC_SHA": 0x002F, + "TLS_DH_DSS_WITH_AES_128_CBC_SHA": 0x0030, + "TLS_DH_RSA_WITH_AES_128_CBC_SHA": 0x0031, + "TLS_DHE_DSS_WITH_AES_128_CBC_SHA": 0x0032, + "TLS_DHE_RSA_WITH_AES_128_CBC_SHA": 0x0033, + "TLS_DH_anon_WITH_AES_128_CBC_SHA": 0x0034, + "TLS_RSA_WITH_AES_256_CBC_SHA": 0x0035, + "TLS_DH_DSS_WITH_AES_256_CBC_SHA": 0x0036, + "TLS_DH_RSA_WITH_AES_256_CBC_SHA": 0x0037, + "TLS_DHE_DSS_WITH_AES_256_CBC_SHA": 0x0038, + "TLS_DHE_RSA_WITH_AES_256_CBC_SHA": 0x0039, + "TLS_DH_anon_WITH_AES_256_CBC_SHA": 0x003A, + "TLS_RSA_WITH_NULL_SHA256": 0x003B, + "TLS_RSA_WITH_AES_128_CBC_SHA256": 0x003C, + "TLS_RSA_WITH_AES_256_CBC_SHA256": 0x003D, + "TLS_DH_DSS_WITH_AES_128_CBC_SHA256": 0x003E, + "TLS_DH_RSA_WITH_AES_128_CBC_SHA256": 0x003F, + "TLS_DHE_DSS_WITH_AES_128_CBC_SHA256": 0x0040, + "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA": 0x0041, + "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA": 0x0042, + "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA": 0x0043, + "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA": 0x0044, + "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA": 0x0045, + "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA": 0x0046, + + "TLS_DHE_RSA_WITH_AES_128_CBC_SHA256": 0x0067, + "TLS_DH_DSS_WITH_AES_256_CBC_SHA256": 0x0068, + "TLS_DH_RSA_WITH_AES_256_CBC_SHA256": 0x0069, + "TLS_DHE_DSS_WITH_AES_256_CBC_SHA256": 0x006A, + "TLS_DHE_RSA_WITH_AES_256_CBC_SHA256": 0x006B, + "TLS_DH_anon_WITH_AES_128_CBC_SHA256": 0x006C, + "TLS_DH_anon_WITH_AES_256_CBC_SHA256": 0x006D, + + "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA": 0x0084, + "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA": 0x0085, + "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA": 0x0086, + "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA": 0x0087, + "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA": 0x0088, + "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA": 0x0089, + "TLS_PSK_WITH_RC4_128_SHA": 0x008A, + "TLS_PSK_WITH_3DES_EDE_CBC_SHA": 0x008B, + "TLS_PSK_WITH_AES_128_CBC_SHA": 0x008C, + "TLS_PSK_WITH_AES_256_CBC_SHA": 0x008D, + "TLS_DHE_PSK_WITH_RC4_128_SHA": 0x008E, + "TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA": 0x008F, + "TLS_DHE_PSK_WITH_AES_128_CBC_SHA": 0x0090, + "TLS_DHE_PSK_WITH_AES_256_CBC_SHA": 0x0091, + "TLS_RSA_PSK_WITH_RC4_128_SHA": 0x0092, + "TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA": 0x0093, + "TLS_RSA_PSK_WITH_AES_128_CBC_SHA": 0x0094, + "TLS_RSA_PSK_WITH_AES_256_CBC_SHA": 0x0095, + "TLS_RSA_WITH_SEED_CBC_SHA": 0x0096, + "TLS_DH_DSS_WITH_SEED_CBC_SHA": 0x0097, + "TLS_DH_RSA_WITH_SEED_CBC_SHA": 0x0098, + "TLS_DHE_DSS_WITH_SEED_CBC_SHA": 0x0099, + "TLS_DHE_RSA_WITH_SEED_CBC_SHA": 0x009A, + "TLS_DH_anon_WITH_SEED_CBC_SHA": 0x009B, + "TLS_RSA_WITH_AES_128_GCM_SHA256": 0x009C, + "TLS_RSA_WITH_AES_256_GCM_SHA384": 0x009D, + "TLS_DHE_RSA_WITH_AES_128_GCM_SHA256": 0x009E, + "TLS_DHE_RSA_WITH_AES_256_GCM_SHA384": 0x009F, + "TLS_DH_RSA_WITH_AES_128_GCM_SHA256": 0x00A0, + "TLS_DH_RSA_WITH_AES_256_GCM_SHA384": 0x00A1, + "TLS_DHE_DSS_WITH_AES_128_GCM_SHA256": 0x00A2, + "TLS_DHE_DSS_WITH_AES_256_GCM_SHA384": 0x00A3, + "TLS_DH_DSS_WITH_AES_128_GCM_SHA256": 0x00A4, + "TLS_DH_DSS_WITH_AES_256_GCM_SHA384": 0x00A5, + "TLS_DH_anon_WITH_AES_128_GCM_SHA256": 0x00A6, + "TLS_DH_anon_WITH_AES_256_GCM_SHA384": 0x00A7, + "TLS_PSK_WITH_AES_128_GCM_SHA256": 0x00A8, + "TLS_PSK_WITH_AES_256_GCM_SHA384": 0x00A9, + "TLS_DHE_PSK_WITH_AES_128_GCM_SHA256": 0x00AA, + "TLS_DHE_PSK_WITH_AES_256_GCM_SHA384": 0x00AB, + "TLS_RSA_PSK_WITH_AES_128_GCM_SHA256": 0x00AC, + "TLS_RSA_PSK_WITH_AES_256_GCM_SHA384": 0x00AD, + "TLS_PSK_WITH_AES_128_CBC_SHA256": 0x00AE, + "TLS_PSK_WITH_AES_256_CBC_SHA384": 0x00AF, + "TLS_PSK_WITH_NULL_SHA256": 0x00B0, + "TLS_PSK_WITH_NULL_SHA384": 0x00B1, + "TLS_DHE_PSK_WITH_AES_128_CBC_SHA256": 0x00B2, + "TLS_DHE_PSK_WITH_AES_256_CBC_SHA384": 0x00B3, + "TLS_DHE_PSK_WITH_NULL_SHA256": 0x00B4, + "TLS_DHE_PSK_WITH_NULL_SHA384": 0x00B5, + "TLS_RSA_PSK_WITH_AES_128_CBC_SHA256": 0x00B6, + "TLS_RSA_PSK_WITH_AES_256_CBC_SHA384": 0x00B7, + "TLS_RSA_PSK_WITH_NULL_SHA256": 0x00B8, + "TLS_RSA_PSK_WITH_NULL_SHA384": 0x00B9, + "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256": 0x00BA, + "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256": 0x00BB, + "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256": 0x00BC, + "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256": 0x00BD, + "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256": 0x00BE, + "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256": 0x00BF, + "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256": 0x00C0, + "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256": 0x00C1, + "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256": 0x00C2, + "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256": 0x00C3, + "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256": 0x00C4, + "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256": 0x00C5, + "TLS_SM4_GCM_SM3": 0x00C6, + "TLS_SM4_CCM_SM3": 0x00C7, + + "TLS_EMPTY_RENEGOTIATION_INFO_SCSV": 0x00FF, + + "TLS_AES_128_GCM_SHA256": 0x1301, + "TLS_AES_256_GCM_SHA384": 0x1302, + "TLS_CHACHA20_POLY1305_SHA256": 0x1303, + "TLS_AES_128_CCM_SHA256": 0x1304, + "TLS_AES_128_CCM_8_SHA256": 0x1305, + "TLS_AEGIS_256_SHA384": 0x1306, + "TLS_AEGIS_128L_SHA256": 0x1307, + + "TLS_FALLBACK_SCSV": 0x5600, + + "TLS_ECDH_ECDSA_WITH_NULL_SHA": 0xC001, + "TLS_ECDH_ECDSA_WITH_RC4_128_SHA": 0xC002, + "TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA": 0xC003, + "TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA": 0xC004, + "TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA": 0xC005, + "TLS_ECDHE_ECDSA_WITH_NULL_SHA": 0xC006, + "TLS_ECDHE_ECDSA_WITH_RC4_128_SHA": 0xC007, + "TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA": 0xC008, + "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA": 0xC009, + "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA": 0xC00A, + "TLS_ECDH_RSA_WITH_NULL_SHA": 0xC00B, + "TLS_ECDH_RSA_WITH_RC4_128_SHA": 0xC00C, + "TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA": 0xC00D, + "TLS_ECDH_RSA_WITH_AES_128_CBC_SHA": 0xC00E, + "TLS_ECDH_RSA_WITH_AES_256_CBC_SHA": 0xC00F, + "TLS_ECDHE_RSA_WITH_NULL_SHA": 0xC010, + "TLS_ECDHE_RSA_WITH_RC4_128_SHA": 0xC011, + "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA": 0xC012, + "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA": 0xC013, + "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA": 0xC014, + "TLS_ECDH_anon_WITH_NULL_SHA": 0xC015, + "TLS_ECDH_anon_WITH_RC4_128_SHA": 0xC016, + "TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA": 0xC017, + "TLS_ECDH_anon_WITH_AES_128_CBC_SHA": 0xC018, + "TLS_ECDH_anon_WITH_AES_256_CBC_SHA": 0xC019, + "TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA": 0xC01A, + "TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA": 0xC01B, + "TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA": 0xC01C, + "TLS_SRP_SHA_WITH_AES_128_CBC_SHA": 0xC01D, + "TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA": 0xC01E, + "TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA": 0xC01F, + "TLS_SRP_SHA_WITH_AES_256_CBC_SHA": 0xC020, + "TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA": 0xC021, + "TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA": 0xC022, + "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256": 0xC023, + "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384": 0xC024, + "TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256": 0xC025, + "TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384": 0xC026, + "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256": 0xC027, + "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384": 0xC028, + "TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256": 0xC029, + "TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384": 0xC02A, + "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256": 0xC02B, + "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384": 0xC02C, + "TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256": 0xC02D, + "TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384": 0xC02E, + "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256": 0xC02F, + "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384": 0xC030, + "TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256": 0xC031, + "TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384": 0xC032, + "TLS_ECDHE_PSK_WITH_RC4_128_SHA": 0xC033, + "TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA": 0xC034, + "TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA": 0xC035, + "TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA": 0xC036, + "TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256": 0xC037, + "TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384": 0xC038, + "TLS_ECDHE_PSK_WITH_NULL_SHA": 0xC039, + "TLS_ECDHE_PSK_WITH_NULL_SHA256": 0xC03A, + "TLS_ECDHE_PSK_WITH_NULL_SHA384": 0xC03B, + "TLS_RSA_WITH_ARIA_128_CBC_SHA256": 0xC03C, + "TLS_RSA_WITH_ARIA_256_CBC_SHA384": 0xC03D, + "TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256": 0xC03E, + "TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384": 0xC03F, + "TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256": 0xC040, + "TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384": 0xC041, + "TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256": 0xC042, + "TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384": 0xC043, + "TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256": 0xC044, + "TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384": 0xC045, + "TLS_DH_anon_WITH_ARIA_128_CBC_SHA256": 0xC046, + "TLS_DH_anon_WITH_ARIA_256_CBC_SHA384": 0xC047, + "TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256": 0xC048, + "TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384": 0xC049, + "TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256": 0xC04A, + "TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384": 0xC04B, + "TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256": 0xC04C, + "TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384": 0xC04D, + "TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256": 0xC04E, + "TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384": 0xC04F, + "TLS_RSA_WITH_ARIA_128_GCM_SHA256": 0xC050, + "TLS_RSA_WITH_ARIA_256_GCM_SHA384": 0xC051, + "TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256": 0xC052, + "TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384": 0xC053, + "TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256": 0xC054, + "TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384": 0xC055, + "TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256": 0xC056, + "TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384": 0xC057, + "TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256": 0xC058, + "TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384": 0xC059, + "TLS_DH_anon_WITH_ARIA_128_GCM_SHA256": 0xC05A, + "TLS_DH_anon_WITH_ARIA_256_GCM_SHA384": 0xC05B, + "TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256": 0xC05C, + "TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384": 0xC05D, + "TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256": 0xC05E, + "TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384": 0xC05F, + "TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256": 0xC060, + "TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384": 0xC061, + "TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256": 0xC062, + "TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384": 0xC063, + "TLS_PSK_WITH_ARIA_128_CBC_SHA256": 0xC064, + "TLS_PSK_WITH_ARIA_256_CBC_SHA384": 0xC065, + "TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256": 0xC066, + "TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384": 0xC067, + "TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256": 0xC068, + "TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384": 0xC069, + "TLS_PSK_WITH_ARIA_128_GCM_SHA256": 0xC06A, + "TLS_PSK_WITH_ARIA_256_GCM_SHA384": 0xC06B, + "TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256": 0xC06C, + "TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384": 0xC06D, + "TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256": 0xC06E, + "TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384": 0xC06F, + "TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256": 0xC070, + "TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384": 0xC071, + "TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256": 0xC072, + "TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384": 0xC073, + "TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256": 0xC074, + "TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384": 0xC075, + "TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256": 0xC076, + "TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384": 0xC077, + "TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256": 0xC078, + "TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384": 0xC079, + "TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC07A, + "TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC07B, + "TLS_DHE_RSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC07C, + "TLS_DHE_RSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC07D, + "TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC07E, + "TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC07F, + "TLS_DHE_DSS_WITH_CAMELLIA_128_GCM_SHA256": 0xC080, + "TLS_DHE_DSS_WITH_CAMELLIA_256_GCM_SHA384": 0xC081, + "TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256": 0xC082, + "TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384": 0xC083, + "TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256": 0xC084, + "TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384": 0xC085, + "TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC086, + "TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC087, + "TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC088, + "TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC089, + "TLS_ECDHE_RSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC08A, + "TLS_ECDHE_RSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC08B, + "TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256": 0xC08C, + "TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384": 0xC08D, + "TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256": 0xC08E, + "TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384": 0xC08F, + "TLS_DHE_PSK_WITH_CAMELLIA_128_GCM_SHA256": 0xC090, + "TLS_DHE_PSK_WITH_CAMELLIA_256_GCM_SHA384": 0xC091, + "TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256": 0xC092, + "TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384": 0xC093, + "TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256": 0xC094, + "TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384": 0xC095, + "TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256": 0xC096, + "TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384": 0xC097, + "TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256": 0xC098, + "TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384": 0xC099, + "TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256": 0xC09A, + "TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384": 0xC09B, + "TLS_RSA_WITH_AES_128_CCM": 0xC09C, + "TLS_RSA_WITH_AES_256_CCM": 0xC09D, + "TLS_DHE_RSA_WITH_AES_128_CCM": 0xC09E, + "TLS_DHE_RSA_WITH_AES_256_CCM": 0xC09F, + "TLS_RSA_WITH_AES_128_CCM_8": 0xC0A0, + "TLS_RSA_WITH_AES_256_CCM_8": 0xC0A1, + "TLS_DHE_RSA_WITH_AES_128_CCM_8": 0xC0A2, + "TLS_DHE_RSA_WITH_AES_256_CCM_8": 0xC0A3, + "TLS_PSK_WITH_AES_128_CCM": 0xC0A4, + "TLS_PSK_WITH_AES_256_CCM": 0xC0A5, + "TLS_DHE_PSK_WITH_AES_128_CCM": 0xC0A6, + "TLS_DHE_PSK_WITH_AES_256_CCM": 0xC0A7, + "TLS_PSK_WITH_AES_128_CCM_8": 0xC0A8, + "TLS_PSK_WITH_AES_256_CCM_8": 0xC0A9, + "TLS_PSK_DHE_WITH_AES_128_CCM_8": 0xC0AA, + "TLS_PSK_DHE_WITH_AES_256_CCM_8": 0xC0AB, + "TLS_ECDHE_ECDSA_WITH_AES_128_CCM": 0xC0AC, + "TLS_ECDHE_ECDSA_WITH_AES_256_CCM": 0xC0AD, + "TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8": 0xC0AE, + "TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8": 0xC0AF, + "TLS_ECCPWD_WITH_AES_128_GCM_SHA256": 0xC0B0, + "TLS_ECCPWD_WITH_AES_256_GCM_SHA384": 0xC0B1, + "TLS_ECCPWD_WITH_AES_128_CCM_SHA256": 0xC0B2, + "TLS_ECCPWD_WITH_AES_256_CCM_SHA384": 0xC0B3, + "TLS_SHA256_SHA256": 0xC0B4, + "TLS_SHA384_SHA384": 0xC0B5, + + "TLS_GOSTR341112_256_WITH_KUZNYECHIK_CTR_OMAC": 0xC100, + "TLS_GOSTR341112_256_WITH_MAGMA_CTR_OMAC": 0xC101, + "TLS_GOSTR341112_256_WITH_28147_CNT_IMIT": 0xC102, + "TLS_GOSTR341112_256_WITH_KUZNYECHIK_MGM_L": 0xC103, + "TLS_GOSTR341112_256_WITH_MAGMA_MGM_L": 0xC104, + "TLS_GOSTR341112_256_WITH_KUZNYECHIK_MGM_S": 0xC105, + "TLS_GOSTR341112_256_WITH_MAGMA_MGM_S": 0xC106, + + "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256": 0xCCA8, + "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256": 0xCCA9, + "TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256": 0xCCAA, + "TLS_PSK_WITH_CHACHA20_POLY1305_SHA256": 0xCCAB, + "TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256": 0xCCAC, + "TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256": 0xCCAD, + "TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256": 0xCCAE, + + "TLS_ECDHE_PSK_WITH_AES_128_GCM_SHA256": 0xD001, + "TLS_ECDHE_PSK_WITH_AES_256_GCM_SHA384": 0xD002, + "TLS_ECDHE_PSK_WITH_AES_128_CCM_8_SHA256": 0xD003, + + "TLS_ECDHE_PSK_WITH_AES_128_CCM_SHA256": 0xD005, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/clientcertificatetype_identifiers.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/clientcertificatetype_identifiers.go new file mode 100644 index 0000000..c022bfd --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/clientcertificatetype_identifiers.go @@ -0,0 +1,49 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-2 +// last updated: March 2023 + +const ( + ClientCertTypeIdentifier_rsa_sign uint8 = 1 + ClientCertTypeIdentifier_dss_sign uint8 = 2 + ClientCertTypeIdentifier_rsa_fixed_dh uint8 = 3 + ClientCertTypeIdentifier_dss_fixed_dh uint8 = 4 + ClientCertTypeIdentifier_rsa_ephemeral_dh uint8 = 5 + ClientCertTypeIdentifier_dss_ephemeral_dh uint8 = 6 + ClientCertTypeIdentifier_fortezza_dms uint8 = 20 + ClientCertTypeIdentifier_ecdsa_sign uint8 = 64 + ClientCertTypeIdentifier_rsa_fixed_ecdh uint8 = 65 + ClientCertTypeIdentifier_ecdsa_fixed_ecdh uint8 = 66 + ClientCertTypeIdentifier_gost_sign256 uint8 = 67 + ClientCertTypeIdentifier_gost_sign512 uint8 = 68 +) + +var DictClientCertificateTypeIdentifierValueIndexed = map[uint8]string{ + 1: "rsa_sign", + 2: "dss_sign", + 3: "rsa_fixed_dh", + 4: "dss_fixed_dh", + 5: "rsa_ephemeral_dh", + 6: "dss_ephemeral_dh", + 20: "fortezza_dms", + 64: "ecdsa_sign", + 65: "rsa_fixed_ecdh", + 66: "ecdsa_fixed_ecdh", + 67: "gost_sign256", + 68: "gost_sign512", +} + +var DictClientCertificateTypeIdentifierNameIndexed = map[string]uint8{ + "rsa_sign": 1, + "dss_sign": 2, + "rsa_fixed_dh": 3, + "dss_fixed_dh": 4, + "rsa_ephemeral_dh": 5, + "dss_ephemeral_dh": 6, + "fortezza_dms": 20, + "ecdsa_sign": 64, + "rsa_fixed_ecdh": 65, + "ecdsa_fixed_ecdh": 66, + "gost_sign256": 67, + "gost_sign512": 68, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/comp_meth_ids.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/comp_meth_ids.go new file mode 100644 index 0000000..a3f951d --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/comp_meth_ids.go @@ -0,0 +1,22 @@ +package dicttls + +// source: https://www.iana.org/assignments/comp-meth-ids/comp-meth-ids-2.csv +// last updated: March 2023 + +const ( + CompMeth_NULL uint8 = 0 + CompMeth_DEFLATE uint8 = 1 + CompMeth_LZS uint8 = 64 +) + +var DictCompMethValueIndexed = map[uint8]string{ + 0: "NULL", + 1: "DEFLATE", + 64: "LZS", +} + +var DictCompMethNameIndexed = map[string]uint8{ + "NULL": 0, + "DEFLATE": 1, + "LZS": 64, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/contenttype.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/contenttype.go new file mode 100644 index 0000000..b54c84d --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/contenttype.go @@ -0,0 +1,34 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-5 +// last updated: March 2023 + +const ( + ContentType_change_cipher_spec uint8 = 20 + ContentType_alert uint8 = 21 + ContentType_handshake uint8 = 22 + ContentType_application_data uint8 = 23 + ContentType_heartbeat uint8 = 24 + ContentType_tls12_cid uint8 = 25 + ContentType_ACK uint8 = 26 +) + +var DictContentTypeValueIndexed = map[uint8]string{ + 20: "change_cipher_spec", + 21: "alert", + 22: "handshake", + 23: "application_data", + 24: "heartbeat", + 25: "tls12_cid", + 26: "ACK", +} + +var DictContentTypeNameIndexed = map[string]uint8{ + "change_cipher_spec": 20, + "alert": 21, + "handshake": 22, + "application_data": 23, + "heartbeat": 24, + "tls12_cid": 25, + "ACK": 26, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/ec_curve_types.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/ec_curve_types.go new file mode 100644 index 0000000..c15db24 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/ec_curve_types.go @@ -0,0 +1,22 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-10 +// last updated: March 2023 + +const ( + ECCurve_explicit_prime uint16 = 1 + ECCurve_explicit_char2 uint16 = 2 + ECCurve_named_curve uint16 = 3 +) + +var DictECCurveTypeValueIndexed = map[uint16]string{ + 1: "explicit_prime", + 2: "explicit_char2", + 3: "named_curve", +} + +var DictECCurveTypeNameIndexed = map[string]uint16{ + "explicit_prime": 1, + "explicit_char2": 2, + "named_curve": 3, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/ec_point_formats.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/ec_point_formats.go new file mode 100644 index 0000000..bfe44bb --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/ec_point_formats.go @@ -0,0 +1,22 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-9 +// last updated: March 2023 + +const ( + ECPoint_uncompressed uint8 = 0 + ECPoint_ansiX962_compressed_prime uint8 = 1 + ECPoint_ansiX962_compressed_char2 uint8 = 2 +) + +var DictECPointFormatValueIndexed = map[uint8]string{ + 0: "uncompressed", + 1: "ansiX962_compressed_prime", + 2: "ansiX962_compressed_char2", +} + +var DictECPointFormatNameIndexed = map[string]uint8{ + "uncompressed": 0, + "ansiX962_compressed_prime": 1, + "ansiX962_compressed_char2": 2, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/exttype_values.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/exttype_values.go new file mode 100644 index 0000000..103e880 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/exttype_values.go @@ -0,0 +1,209 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#tls-extensiontype-values-1 +// last updated: March 2023 + +const ( + ExtType_server_name uint16 = 0 + ExtType_max_fragment_length uint16 = 1 + ExtType_client_certificate_url uint16 = 2 + ExtType_trusted_ca_keys uint16 = 3 + ExtType_truncated_hmac uint16 = 4 + ExtType_status_request uint16 = 5 + ExtType_user_mapping uint16 = 6 + ExtType_client_authz uint16 = 7 + ExtType_server_authz uint16 = 8 + ExtType_cert_type uint16 = 9 + ExtType_supported_groups uint16 = 10 + ExtType_ec_point_formats uint16 = 11 + ExtType_srp uint16 = 12 + ExtType_signature_algorithms uint16 = 13 + ExtType_use_srtp uint16 = 14 + ExtType_heartbeat uint16 = 15 + ExtType_application_layer_protocol_negotiation uint16 = 16 + ExtType_status_request_v2 uint16 = 17 + ExtType_signed_certificate_timestamp uint16 = 18 + ExtType_client_certificate_type uint16 = 19 + ExtType_server_certificate_type uint16 = 20 + ExtType_padding uint16 = 21 + ExtType_encrypt_then_mac uint16 = 22 + ExtType_extended_master_secret uint16 = 23 + ExtType_token_binding uint16 = 24 + ExtType_cached_info uint16 = 25 + ExtType_tls_lts uint16 = 26 + ExtType_compress_certificate uint16 = 27 + ExtType_record_size_limit uint16 = 28 + ExtType_pwd_protect uint16 = 29 + ExtType_pwd_clear uint16 = 30 + ExtType_password_salt uint16 = 31 + ExtType_ticket_pinning uint16 = 32 + ExtType_tls_cert_with_extern_psk uint16 = 33 + ExtType_delegated_credentials uint16 = 34 // IANA name: delegated_credentials, IETF name: delegated_credential + ExtType_session_ticket uint16 = 35 + ExtType_TLMSP uint16 = 36 + ExtType_TLMSP_proxying uint16 = 37 + ExtType_TLMSP_delegate uint16 = 38 + ExtType_supported_ekt_ciphers uint16 = 39 + ExtType_pre_shared_key uint16 = 41 + ExtType_early_data uint16 = 42 + ExtType_supported_versions uint16 = 43 + ExtType_cookie uint16 = 44 + ExtType_psk_key_exchange_modes uint16 = 45 + ExtType_certificate_authorities uint16 = 47 + ExtType_oid_filters uint16 = 48 + ExtType_post_handshake_auth uint16 = 49 + ExtType_signature_algorithms_cert uint16 = 50 + ExtType_key_share uint16 = 51 + ExtType_transparency_info uint16 = 52 + ExtType_connection_id_deprecated uint16 = 53 // deprecated + ExtType_connection_id uint16 = 54 + ExtType_external_id_hash uint16 = 55 + ExtType_external_session_id uint16 = 56 + ExtType_quic_transport_parameters uint16 = 57 + ExtType_ticket_request uint16 = 58 + ExtType_dnssec_chain uint16 = 59 + ExtType_renegotiation_info uint16 = 65281 +) + +// Not IANA assigned +const ( + ExtType_next_protocol_negotiation uint16 = 13172 // https://datatracker.ietf.org/doc/html/draft-agl-tls-nextprotoneg-04 + ExtType_application_settings uint16 = 17513 // https://www.ietf.org/archive/id/draft-vvv-tls-alps-01.html + ExtType_channel_id_old uint16 = 30031 // https://datatracker.ietf.org/doc/html/draft-balfanz-tls-channelid-01 + ExtType_channel_id uint16 = 30032 // https://datatracker.ietf.org/doc/html/draft-balfanz-tls-channelid-01 +) + +var DictExtTypeValueIndexed = map[uint16]string{ + 0: "server_name", + 1: "max_fragment_length", + 2: "client_certificate_url", + 3: "trusted_ca_keys", + 4: "truncated_hmac", + 5: "status_request", + 6: "user_mapping", + 7: "client_authz", + 8: "server_authz", + 9: "cert_type", + 10: "supported_groups", + 11: "ec_point_formats", + 12: "srp", + 13: "signature_algorithms", + 14: "use_srtp", + 15: "heartbeat", + 16: "application_layer_protocol_negotiation", + 17: "status_request_v2", + 18: "signed_certificate_timestamp", + 19: "client_certificate_type", + 20: "server_certificate_type", + 21: "padding", + 22: "encrypt_then_mac", + 23: "extended_master_secret", + 24: "token_binding", + 25: "cached_info", + 26: "tls_lts", + 27: "compress_certificate", + 28: "record_size_limit", + 29: "pwd_protect", + 30: "pwd_clear", + 31: "password_salt", + 32: "ticket_pinning", + 33: "tls_cert_with_extern_psk", + 34: "delegated_credentials", // IANA name: delegated_credentials, IETF name: delegated_credential + 35: "session_ticket", + 36: "TLMSP", + 37: "TLMSP_proxying", + 38: "TLMSP_delegate", + 39: "supported_ekt_ciphers", + 41: "pre_shared_key", + 42: "early_data", + 43: "supported_versions", + 44: "cookie", + 45: "psk_key_exchange_modes", + 47: "certificate_authorities", + 48: "oid_filters", + 49: "post_handshake_auth", + 50: "signature_algorithms_cert", + 51: "key_share", + 52: "transparency_info", + 53: "connection_id_deprecated", // deprecated + 54: "connection_id", + 55: "external_id_hash", + 56: "external_session_id", + 57: "quic_transport_parameters", + 58: "ticket_request", + 59: "dnssec_chain", + 65281: "renegotiation_info", + + 13172: "next_protocol_negotiation", + 17513: "application_settings", + 30031: "channel_id_old", + 30032: "channel_id", +} + +var DictExtTypeNameIndexed = map[string]uint16{ + "server_name": 0, + "max_fragment_length": 1, + "client_certificate_url": 2, + "trusted_ca_keys": 3, + "truncated_hmac": 4, + "status_request": 5, + "user_mapping": 6, + "client_authz": 7, + "server_authz": 8, + "cert_type": 9, + "supported_groups": 10, + "ec_point_formats": 11, + "srp": 12, + "signature_algorithms": 13, + "use_srtp": 14, + "heartbeat": 15, + "application_layer_protocol_negotiation": 16, + "status_request_v2": 17, + "signed_certificate_timestamp": 18, + "client_certificate_type": 19, + "server_certificate_type": 20, + "padding": 21, + "encrypt_then_mac": 22, + "extended_master_secret": 23, + "token_binding": 24, + "cached_info": 25, + "tls_lts": 26, + "compress_certificate": 27, + "record_size_limit": 28, + "pwd_protect": 29, + "pwd_clear": 30, + "password_salt": 31, + "ticket_pinning": 32, + "tls_cert_with_extern_psk": 33, + "delegated_credentials": 34, // IANA name: delegated_credentials + "delegated_credential": 34, // IETF name: delegated_credential + "session_ticket": 35, + "TLMSP": 36, + "TLMSP_proxying": 37, + "TLMSP_delegate": 38, + "supported_ekt_ciphers": 39, + "pre_shared_key": 41, + "early_data": 42, + "supported_versions": 43, + "cookie": 44, + "psk_key_exchange_modes": 45, + "certificate_authorities": 47, + "oid_filters": 48, + "post_handshake_auth": 49, + "signature_algorithms_cert": 50, + "key_share": 51, + "transparency_info": 52, + "connection_id_deprecated": 53, // deprecated + "connection_id": 54, + "external_id_hash": 55, + "external_session_id": 56, + "quic_transport_parameters": 57, + "ticket_request": 58, + "dnssec_chain": 59, + "renegotiation_info": 65281, + + "next_protocol_negotiation": 13172, + "application_settings": 17513, + "channel_id_old": 30031, + "channel_id": 30032, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/handshaketype.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/handshaketype.go new file mode 100644 index 0000000..798a1c3 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/handshaketype.go @@ -0,0 +1,96 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-7 +// last updated: March 2023 + +const ( + HandshakeType_hello_request uint8 = 0 + HandshakeType_client_hello uint8 = 1 + HandshakeType_server_hello uint8 = 2 + HandshakeType_hello_verify_request uint8 = 3 + HandshakeType_new_session_ticket uint8 = 4 + HandshakeType_end_of_early_data uint8 = 5 + HandshakeType_hello_retry_request uint8 = 6 + HandshakeType_encrypted_extensions uint8 = 8 + HandshakeType_request_connection_id uint8 = 9 + HandshakeType_new_connection_id uint8 = 10 + HandshakeType_certificate uint8 = 11 + HandshakeType_server_key_exchange uint8 = 12 + HandshakeType_certificate_request uint8 = 13 + HandshakeType_server_hello_done uint8 = 14 + HandshakeType_certificate_verify uint8 = 15 + HandshakeType_client_key_exchange uint8 = 16 + HandshakeType_client_certificate_request uint8 = 17 + HandshakeType_finished uint8 = 20 + HandshakeType_certificate_url uint8 = 21 + HandshakeType_certificate_status uint8 = 22 + HandshakeType_supplemental_data uint8 = 23 + HandshakeType_key_update uint8 = 24 + HandshakeType_compressed_certificate uint8 = 25 + HandshakeType_ekt_key uint8 = 26 + HandshakeType_message_hash uint8 = 254 + + // Not IANA assigned + HandshakeType_next_protocol uint8 = 67 +) + +var DictHandshakeTypeValueIndexed = map[uint8]string{ + 0: "hello_request", + 1: "client_hello", + 2: "server_hello", + 3: "hello_verify_request", + 4: "new_session_ticket", + 5: "end_of_early_data", + 6: "hello_retry_request", + 7: "Unassigned", + 8: "encrypted_extensions", + 9: "request_connection_id", + 10: "new_connection_id", + 11: "certificate", + 12: "server_key_exchange", + 13: "certificate_request", + 14: "server_hello_done", + 15: "certificate_verify", + 16: "client_key_exchange", + 17: "client_certificate_request", + 20: "finished", + 21: "certificate_url", + 22: "certificate_status", + 23: "supplemental_data", + 24: "key_update", + 25: "compressed_certificate", + 26: "ekt_key", + 254: "message_hash", + + 67: "next_protocol", +} + +var DictHandshakeTypeNameIndexed = map[string]uint8{ + "hello_request": 0, + "client_hello": 1, + "server_hello": 2, + "hello_verify_request": 3, + "new_session_ticket": 4, + "end_of_early_data": 5, + "hello_retry_request": 6, + "encrypted_extensions": 8, + "request_connection_id": 9, + "new_connection_id": 10, + "certificate": 11, + "server_key_exchange": 12, + "certificate_request": 13, + "server_hello_done": 14, + "certificate_verify": 15, + "client_key_exchange": 16, + "client_certificate_request": 17, + "finished": 20, + "certificate_url": 21, + "certificate_status": 22, + "supplemental_data": 23, + "key_update": 24, + "compressed_certificate": 25, + "ekt_key": 26, + "message_hash": 254, + + "next_protocol": 67, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/hashalgorithm.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/hashalgorithm.go new file mode 100644 index 0000000..24e6158 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/hashalgorithm.go @@ -0,0 +1,39 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-18 +// last updated: March 2023 + +const ( + HashAlg_none uint8 = 0 // deprecated in TLS 1.3 + HashAlg_md5 uint8 = 1 // deprecated in TLS 1.3 + HashAlg_sha1 uint8 = 2 + HashAlg_sha224 uint8 = 3 // deprecated in TLS 1.3 + HashAlg_sha256 uint8 = 4 + HashAlg_sha384 uint8 = 5 + HashAlg_sha512 uint8 = 6 + HashAlg_Intrinsic uint8 = 8 +) + +var DictHashAlgorithmValueIndexed = map[uint8]string{ + 0: "none", + 1: "md5", + 2: "sha1", + 3: "sha224", + 4: "sha256", + 5: "sha384", + 6: "sha512", + 7: "Reserved", + 8: "Intrinsic", +} + +var DictHashAlgorithmNameIndexed = map[string]uint8{ + "none": 0, + "md5": 1, + "sha1": 2, + "sha224": 3, + "sha256": 4, + "sha384": 5, + "sha512": 6, + "Reserved": 7, + "Intrinsic": 8, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/heartbeat_message_types.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/heartbeat_message_types.go new file mode 100644 index 0000000..0b076be --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/heartbeat_message_types.go @@ -0,0 +1,19 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/heartbeat-message-types.csv +// last updated: March 2023 + +const ( + HeartbeatMessage_request uint8 = 1 + HeartbeatMessage_response uint8 = 2 +) + +var DictHeartbeatMessageTypeValueIndexed = map[uint8]string{ + 1: "heartbeat_request", + 2: "heartbeat_response", +} + +var DictHeartbeatMessageTypeNameIndexed = map[string]uint8{ + "heartbeat_request": 1, + "heartbeat_response": 2, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/heartbeat_mode.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/heartbeat_mode.go new file mode 100644 index 0000000..747ae6e --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/heartbeat_mode.go @@ -0,0 +1,19 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/heartbeat-modes.csv +// last updated: March 2023 + +const ( + HeartbeatMode_peer_allowed_to_send uint8 = 1 + HeartbeatMode_peer_not_allowed_to_send uint8 = 2 +) + +var DictHeartbeatModeValueIndexed = map[uint8]string{ + 1: "peer_allowed_to_send", + 2: "peer_not_allowed_to_send", +} + +var DictHeartbeatModeNameIndexed = map[string]uint8{ + "peer_allowed_to_send": 1, + "peer_not_allowed_to_send": 2, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/hpke_aead_identifiers.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/hpke_aead_identifiers.go new file mode 100644 index 0000000..c4f8231 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/hpke_aead_identifiers.go @@ -0,0 +1,19 @@ +package dicttls + +// source: https://www.iana.org/assignments/hpke/hpke.xhtml +// last updated: December 2023 + +const ( + AEAD_AES_128_GCM uint16 = 0x0001 // NIST Special Publication 800-38D + AEAD_AES_256_GCM uint16 = 0x0002 // NIST Special Publication 800-38D + AEAD_CHACHA20_POLY1305 uint16 = 0x0003 // RFC 8439 + AEAD_EXPORT_ONLY uint16 = 0xFFFF // RFC 9180 +) + +var DictAEADIdentifierValueIndexed = map[uint16]string{ + 0x0000: "Reserved", // RFC 9180 + 0x0001: "AES-128-GCM", + 0x0002: "AES-256-GCM", + 0x0003: "ChaCha20Poly1305", + 0xFFFF: "Export-only", // RFC 9180 +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/hpke_kdf_identifiers.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/hpke_kdf_identifiers.go new file mode 100644 index 0000000..7471943 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/hpke_kdf_identifiers.go @@ -0,0 +1,24 @@ +package dicttls + +// source: https://www.iana.org/assignments/hpke/hpke.xhtml +// last updated: December 2023 + +const ( + HKDF_SHA256 uint16 = 0x0001 + HKDF_SHA384 uint16 = 0x0002 + HKDF_SHA512 uint16 = 0x0003 +) + +var DictKDFIdentifierValueIndexed = map[uint16]string{ + 0x0000: "Reserved", // RFC 9180 + 0x0001: "HKDF_SHA256", + 0x0002: "HKDF_SHA384", + 0x0003: "HKDF_SHA512", +} + +var DictKDFIdentifierNameIndexed = map[string]uint16{ + "Reserved": 0x0000, // RFC 9180 + "HKDF_SHA256": 0x0001, + "HKDF_SHA384": 0x0002, + "HKDF_SHA512": 0x0003, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/hpke_kem_identifiers.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/hpke_kem_identifiers.go new file mode 100644 index 0000000..213e7f8 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/hpke_kem_identifiers.go @@ -0,0 +1,53 @@ +package dicttls + +// source: https://www.iana.org/assignments/hpke/hpke.xhtml +// last updated: December 2023 + +const ( + DHKEM_P256_HKDF_SHA256 uint16 = 0x0010 // RFC 5869 + DHKEM_P384_HKDF_SHA384 uint16 = 0x0011 // RFC 5869 + DHKEM_P521_HKDF_SHA512 uint16 = 0x0012 // RFC 5869 + DHKEM_CP256_HKDF_SHA256 uint16 = 0x0013 // RFC 6090 + DHKEM_CP384_HKDF_SHA384 uint16 = 0x0014 // RFC 6090 + DHKEM_CP521_HKDF_SHA512 uint16 = 0x0015 // RFC 6090 + DHKEM_SECP256K1_HKDF_SHA256 uint16 = 0x0016 // draft-wahby-cfrg-hpke-kem-secp256k1-01 + + DHKEM_X25519_HKDF_SHA256 uint16 = 0x0020 // RFC 7748 + DHKEM_X448_HKDF_SHA512 uint16 = 0x0021 // RFC 7748 + + X25519_KYBER768_DRAFT00 uint16 = 0x0030 // draft-westerbaan-cfrg-hpke-xyber768d00-02 +) + +var DictKEMIdentifierValueIndexed = map[uint16]string{ + 0x0000: "Reserved", // RFC 9180 + + 0x0010: "DHKEM(P-256, HKDF-SHA256)", + 0x0011: "DHKEM(P-384, HKDF-SHA384)", + 0x0012: "DHKEM(P-521, HKDF-SHA512)", + 0x0013: "DHKEM(CP-256, HKDF-SHA256)", + 0x0014: "DHKEM(CP-384, HKDF-SHA384)", + 0x0015: "DHKEM(CP-521, HKDF-SHA512)", + 0x0016: "DHKEM(secp256k1, HKDF-SHA256)", + + 0x0020: "DHKEM(X25519, HKDF-SHA256)", + 0x0021: "DHKEM(X448, HKDF-SHA512)", + + 0x0030: "X25519Kyber768Draft00", +} + +var DictKEMIdentifierNameIndexed = map[string]uint16{ + "Reserved": 0x0000, // RFC 9180 + + "DHKEM(P-256, HKDF-SHA256)": 0x0010, + "DHKEM(P-384, HKDF-SHA384)": 0x0011, + "DHKEM(P-521, HKDF-SHA512)": 0x0012, + "DHKEM(CP-256, HKDF-SHA256)": 0x0013, + "DHKEM(CP-384, HKDF-SHA384)": 0x0014, + "DHKEM(CP-521, HKDF-SHA512)": 0x0015, + "DHKEM(secp256k1, HKDF-SHA256)": 0x0016, + + "DHKEM(X25519, HKDF-SHA256)": 0x0020, + "DHKEM(X448, HKDF-SHA512)": 0x0021, + + "X25519Kyber768Draft00": 0x0030, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/psk_key_exchange_mode.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/psk_key_exchange_mode.go new file mode 100644 index 0000000..7f3cc38 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/psk_key_exchange_mode.go @@ -0,0 +1,19 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-pskkeyexchangemode.csv +// last updated: March 2023 + +const ( + PSKKeyExchangeMode_psk_ke uint8 = 0 + PSKKeyExchangeMode_psk_dhe_ke uint8 = 1 +) + +var DictPSKKeyExchangeModeValueIndexed = map[uint8]string{ + 0: "psk_ke", + 1: "psk_dhe_ke", +} + +var DictPSKKeyExchangeModeNameIndexed = map[string]uint8{ + "psk_ke": 0, + "psk_dhe_ke": 1, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/quic_frame_types.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/quic_frame_types.go new file mode 100644 index 0000000..a7dd0ac --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/quic_frame_types.go @@ -0,0 +1,112 @@ +package dicttls + +// source: https://www.iana.org/assignments/quic/quic.xhtml#quic-frame-types +// last updated: July 2023 + +const ( + QUICFrameType_PADDING uint8 = 0x00 + QUICFrameType_PING uint8 = 0x01 + QUICFrameType_ACK uint8 = 0x02 + QUICFrameType_ACK_ecn uint8 = 0x03 + QUICFrameType_RESET_STREAM uint8 = 0x04 + QUICFrameType_STOP_SENDING uint8 = 0x05 + QUICFrameType_CRYPTO uint8 = 0x06 + QUICFrameType_NEW_TOKEN uint8 = 0x07 + QUICFrameType_STREAM uint8 = 0x08 + QUICFrameType_STREAM_fin uint8 = 0x09 + QUICFrameType_STREAM_len uint8 = 0x0a + QUICFrameType_STREAM_len_fin uint8 = 0x0b + QUICFrameType_STREAM_off uint8 = 0x0c + QUICFrameType_STREAM_off_fin uint8 = 0x0d + QUICFrameType_STREAM_off_len uint8 = 0x0e + QUICFrameType_STREAM_off_len_fin uint8 = 0x0f + QUICFrameType_MAX_DATA uint8 = 0x10 + QUICFrameType_MAX_STREAM_DATA uint8 = 0x11 + QUICFrameType_MAX_STREAMS_bidi uint8 = 0x12 + QUICFrameType_MAX_STREAMS_uni uint8 = 0x13 + QUICFrameType_DATA_BLOCKED uint8 = 0x14 + QUICFrameType_STREAM_DATA_BLOCKED uint8 = 0x15 + QUICFrameType_STREAMS_BLOCKED_bidi uint8 = 0x16 + QUICFrameType_STREAMS_BLOCKED_uni uint8 = 0x17 + QUICFrameType_NEW_CONNECTION_ID uint8 = 0x18 + QUICFrameType_RETIRE_CONNECTION_ID uint8 = 0x19 + QUICFrameType_PATH_CHALLENGE uint8 = 0x1a + QUICFrameType_PATH_RESPONSE uint8 = 0x1b + QUICFrameType_CONNECTION_CLOSE uint8 = 0x1c + QUICFrameType_CONNECTION_CLOSE_app uint8 = 0x1d + QUICFrameType_HANDSHAKE_DONE uint8 = 0x1e + QUICFrameType_DATAGRAM uint8 = 0x30 // RFC9221 + QUICFrameType_DATAGRAM_len uint8 = 0x31 // RFC9221 +) + +var DictQUICFrameTypeValueIndexed = map[uint8]string{ + 0x00: "PADDING", + 0x01: "PING", + 0x02: "ACK", + 0x03: "ACK_ecn", + 0x04: "RESET_STREAM", + 0x05: "STOP_SENDING", + 0x06: "CRYPTO", + 0x07: "NEW_TOKEN", + 0x08: "STREAM", + 0x09: "STREAM_fin", + 0x0a: "STREAM_len", + 0x0b: "STREAM_len_fin", + 0x0c: "STREAM_off", + 0x0d: "STREAM_off_fin", + 0x0e: "STREAM_off_len", + 0x0f: "STREAM_off_len_fin", + 0x10: "MAX_DATA", + 0x11: "MAX_STREAM_DATA", + 0x12: "MAX_STREAMS_bidi", + 0x13: "MAX_STREAMS_uni", + 0x14: "DATA_BLOCKED", + 0x15: "STREAM_DATA_BLOCKED", + 0x16: "STREAMS_BLOCKED_bidi", + 0x17: "STREAMS_BLOCKED_uni", + 0x18: "NEW_CONNECTION_ID", + 0x19: "RETIRE_CONNECTION_ID", + 0x1a: "PATH_CHALLENGE", + 0x1b: "PATH_RESPONSE", + 0x1c: "CONNECTION_CLOSE", + 0x1d: "CONNECTION_CLOSE_app", + 0x1e: "HANDSHAKE_DONE", + 0x30: "DATAGRAM", + 0x31: "DATAGRAM_len", +} + +var DictQUICFrameTypeNameIndexed = map[string]uint8{ + "PADDING": 0x00, + "PING": 0x01, + "ACK": 0x02, + "ACK_ecn": 0x03, + "RESET_STREAM": 0x04, + "STOP_SENDING": 0x05, + "CRYPTO": 0x06, + "NEW_TOKEN": 0x07, + "STREAM": 0x08, + "STREAM_fin": 0x09, + "STREAM_len": 0x0a, + "STREAM_len_fin": 0x0b, + "STREAM_off": 0x0c, + "STREAM_off_fin": 0x0d, + "STREAM_off_len": 0x0e, + "STREAM_off_len_fin": 0x0f, + "MAX_DATA": 0x10, + "MAX_STREAM_DATA": 0x11, + "MAX_STREAMS_bidi": 0x12, + "MAX_STREAMS_uni": 0x13, + "DATA_BLOCKED": 0x14, + "STREAM_DATA_BLOCKED": 0x15, + "STREAMS_BLOCKED_bidi": 0x16, + "STREAMS_BLOCKED_uni": 0x17, + "NEW_CONNECTION_ID": 0x18, + "RETIRE_CONNECTION_ID": 0x19, + "PATH_CHALLENGE": 0x1a, + "PATH_RESPONSE": 0x1b, + "CONNECTION_CLOSE": 0x1c, + "CONNECTION_CLOSE_app": 0x1d, + "HANDSHAKE_DONE": 0x1e, + "DATAGRAM": 0x30, + "DATAGRAM_len": 0x31, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/quic_transport_error_codes.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/quic_transport_error_codes.go new file mode 100644 index 0000000..52d2c8b --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/quic_transport_error_codes.go @@ -0,0 +1,70 @@ +package dicttls + +// source: https://www.iana.org/assignments/quic/quic.xhtml#quic-transport-error-codes +// last updated: July 2023 + +const ( + QUICTransportErrorCode_NO_ERROR uint16 = 0x0000 + QUICTransportErrorCode_INTERNAL_ERROR uint16 = 0x0001 + QUICTransportErrorCode_CONNECTION_REFUSED uint16 = 0x0002 + QUICTransportErrorCode_FLOW_CONTROL_ERROR uint16 = 0x0003 + QUICTransportErrorCode_STREAM_LIMIT_ERROR uint16 = 0x0004 + QUICTransportErrorCode_STREAM_STATE_ERROR uint16 = 0x0005 + QUICTransportErrorCode_FINAL_SIZE_ERROR uint16 = 0x0006 + QUICTransportErrorCode_FRAME_ENCODING_ERROR uint16 = 0x0007 + QUICTransportErrorCode_TRANSPORT_PARAMETER_ERROR uint16 = 0x0008 + QUICTransportErrorCode_CONNECTION_ID_LIMIT_ERROR uint16 = 0x0009 + QUICTransportErrorCode_PROTOCOL_VIOLATION uint16 = 0x000A + QUICTransportErrorCode_INVALID_TOKEN uint16 = 0x000B + QUICTransportErrorCode_APPLICATION_ERROR uint16 = 0x000C + QUICTransportErrorCode_CRYPTO_BUFFER_EXCEEDED uint16 = 0x000D + QUICTransportErrorCode_KEY_UPDATE_ERROR uint16 = 0x000E + QUICTransportErrorCode_AEAD_LIMIT_REACHED uint16 = 0x000F + QUICTransportErrorCode_NO_VIABLE_PATH uint16 = 0x0010 + QUICTransportErrorCode_VERSION_NEGOTIATION_ERROR uint16 = 0x0011 // RFC9368 + QUICTransportErrorCode_CRYPTO_ERROR uint16 = 0x0100 // 0x0100-0x01FF, use with bitwise operator +) + +var DictQUICTransportErrorCodeValueIndexed = map[uint16]string{ + 0x0000: "NO_ERROR", + 0x0001: "INTERNAL_ERROR", + 0x0002: "CONNECTION_REFUSED", + 0x0003: "FLOW_CONTROL_ERROR", + 0x0004: "STREAM_LIMIT_ERROR", + 0x0005: "STREAM_STATE_ERROR", + 0x0006: "FINAL_SIZE_ERROR", + 0x0007: "FRAME_ENCODING_ERROR", + 0x0008: "TRANSPORT_PARAMETER_ERROR", + 0x0009: "CONNECTION_ID_LIMIT_ERROR", + 0x000A: "PROTOCOL_VIOLATION", + 0x000B: "INVALID_TOKEN", + 0x000C: "APPLICATION_ERROR", + 0x000D: "CRYPTO_BUFFER_EXCEEDED", + 0x000E: "KEY_UPDATE_ERROR", + 0x000F: "AEAD_LIMIT_REACHED", + 0x0010: "NO_VIABLE_PATH", + 0x0011: "VERSION_NEGOTIATION_ERROR", + 0x0100: "CRYPTO_ERROR", +} + +var DictQUICTransportErrorCodeNameIndexed = map[string]uint16{ + "NO_ERROR": 0x0000, + "INTERNAL_ERROR": 0x0001, + "CONNECTION_REFUSED": 0x0002, + "FLOW_CONTROL_ERROR": 0x0003, + "STREAM_LIMIT_ERROR": 0x0004, + "STREAM_STATE_ERROR": 0x0005, + "FINAL_SIZE_ERROR": 0x0006, + "FRAME_ENCODING_ERROR": 0x0007, + "TRANSPORT_PARAMETER_ERROR": 0x0008, + "CONNECTION_ID_LIMIT_ERROR": 0x0009, + "PROTOCOL_VIOLATION": 0x000A, + "INVALID_TOKEN": 0x000B, + "APPLICATION_ERROR": 0x000C, + "CRYPTO_BUFFER_EXCEEDED": 0x000D, + "KEY_UPDATE_ERROR": 0x000E, + "AEAD_LIMIT_REACHED": 0x000F, + "NO_VIABLE_PATH": 0x0010, + "VERSION_NEGOTIATION_ERROR": 0x0011, + "CRYPTO_ERROR": 0x0100, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/quic_transport_parameters.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/quic_transport_parameters.go new file mode 100644 index 0000000..66eb881 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/quic_transport_parameters.go @@ -0,0 +1,91 @@ +package dicttls + +// source: https://www.iana.org/assignments/quic/quic.xhtml#quic-transport +// last updated: July 2023 + +const ( + QUICTransportParameter_original_destination_connection_id uint64 = 0x00 + QUICTransportParameter_max_idle_timeout uint64 = 0x01 + QUICTransportParameter_stateless_reset_token uint64 = 0x02 + QUICTransportParameter_max_udp_payload_size uint64 = 0x03 + QUICTransportParameter_initial_max_data uint64 = 0x04 + QUICTransportParameter_initial_max_stream_data_bidi_local uint64 = 0x05 + QUICTransportParameter_initial_max_stream_data_bidi_remote uint64 = 0x06 + QUICTransportParameter_initial_max_stream_data_uni uint64 = 0x07 + QUICTransportParameter_initial_max_streams_bidi uint64 = 0x08 + QUICTransportParameter_initial_max_streams_uni uint64 = 0x09 + QUICTransportParameter_ack_delay_exponent uint64 = 0x0a + QUICTransportParameter_max_ack_delay uint64 = 0x0b + QUICTransportParameter_disable_active_migration uint64 = 0x0c + QUICTransportParameter_preferred_address uint64 = 0x0d + QUICTransportParameter_active_connection_id_limit uint64 = 0x0e + QUICTransportParameter_initial_source_connection_id uint64 = 0x0f + QUICTransportParameter_retry_source_connection_id uint64 = 0x10 + QUICTransportParameter_version_information uint64 = 0x11 // RFC9368 + QUICTransportParameter_max_datagram_frame_size uint64 = 0x20 // RFC9221 + QUICTransportParameter_discard uint64 = 0x173e // David_Schinazi: Receiver silently discards. https://github.com/quicwg/base-drafts/wiki/Quantum-Readiness-test + QUICTransportParameter_google_handshake_message uint64 = 0x26ab // Google: Used to carry Google internal handshake message + QUICTransportParameter_grease_quic_bit uint64 = 0x2ab2 // RFC9287 + QUICTransportParameter_initial_rtt uint64 = 0x3127 // Google: Initial RTT in microseconds + QUICTransportParameter_google_connection_options uint64 = 0x3128 // Google: Google connection options for experimentation + QUICTransportParameter_user_agent uint64 = 0x3129 // Google: User agent string (deprecated) + QUICTransportParameter_google_version uint64 = 0x4752 // Google: Google QUIC version downgrade prevention +) + +var DictQUICTransportParameterValueIndexed = map[uint64]string{ + 0x00: "original_destination_connection_id", + 0x01: "max_idle_timeout", + 0x02: "stateless_reset_token", + 0x03: "max_udp_payload_size", + 0x04: "initial_max_data", + 0x05: "initial_max_stream_data_bidi_local", + 0x06: "initial_max_stream_data_bidi_remote", + 0x07: "initial_max_stream_data_uni", + 0x08: "initial_max_streams_bidi", + 0x09: "initial_max_streams_uni", + 0x0a: "ack_delay_exponent", + 0x0b: "max_ack_delay", + 0x0c: "disable_active_migration", + 0x0d: "preferred_address", + 0x0e: "active_connection_id_limit", + 0x0f: "initial_source_connection_id", + 0x10: "retry_source_connection_id", + 0x11: "version_information", + 0x20: "max_datagram_frame_size", + 0x173e: "discard", + 0x26ab: "google handshake message", + 0x2ab2: "grease_quic_bit", + 0x3127: "initial_rtt", + 0x3128: "google_connection_options", + 0x3129: "user_agent", + 0x4752: "google_version", +} + +var DictQUICTransportParameterNameIndexed = map[string]uint64{ + "original_destination_connection_id": 0x00, + "max_idle_timeout": 0x01, + "stateless_reset_token": 0x02, + "max_udp_payload_size": 0x03, + "initial_max_data": 0x04, + "initial_max_stream_data_bidi_local": 0x05, + "initial_max_stream_data_bidi_remote": 0x06, + "initial_max_stream_data_uni": 0x07, + "initial_max_streams_bidi": 0x08, + "initial_max_streams_uni": 0x09, + "ack_delay_exponent": 0x0a, + "max_ack_delay": 0x0b, + "disable_active_migration": 0x0c, + "preferred_address": 0x0d, + "active_connection_id_limit": 0x0e, + "initial_source_connection_id": 0x0f, + "retry_source_connection_id": 0x10, + "version_information": 0x11, + "max_datagram_frame_size": 0x20, + "discard": 0x173e, + "google handshake message": 0x26ab, + "grease_quic_bit": 0x2ab2, + "initial_rtt": 0x3127, + "google_connection_options": 0x3128, + "user_agent": 0x3129, + "google_version": 0x4752, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/signaturealgorithm.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/signaturealgorithm.go new file mode 100644 index 0000000..65c40c4 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/signaturealgorithm.go @@ -0,0 +1,41 @@ +package dicttls + +// Note: values in this file was used in TLS 1.2's signature_algorithms extension +// in combination with the values in hashalgorithm.go. +// signature_algorithms extension in TLS 1.3 uses values in signaturescheme.go + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-16 +// last updated: March 2023 + +const ( + SigAlg_anonymous uint8 = 0 // deprecated in TLS 1.3 + SigAlg_rsa uint8 = 1 + SigAlg_dsa uint8 = 2 // deprecated in TLS 1.3 + SigAlg_ecdsa uint8 = 3 + SigAlg_ed25519 uint8 = 7 + SigAlg_ed448 uint8 = 8 + SigAlg_gostr34102012_256 uint8 = 64 // value changed in TLS 1.3, to 0x0709-0x070C + SigAlg_gostr34102012_512 uint8 = 65 // value changed in TLS 1.3, to 0x070D-0x070F +) + +var DictSignatureAlgorithmValueIndexed = map[uint8]string{ + 0: "anonymous", + 1: "rsa", + 2: "dsa", + 3: "ecdsa", + 7: "ed25519", + 8: "ed448", + 64: "gostr34102012_256", + 65: "gostr34102012_512", +} + +var DictSignatureAlgorithmNameIndexed = map[string]uint8{ + "anonymous": 0, + "rsa": 1, + "dsa": 2, + "ecdsa": 3, + "ed25519": 7, + "ed448": 8, + "gostr34102012_256": 64, + "gostr34102012_512": 65, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/signaturescheme.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/signaturescheme.go new file mode 100644 index 0000000..d0b9803 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/signaturescheme.go @@ -0,0 +1,116 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-signaturescheme.csv +// last updated: March 2023 + +const ( + SigScheme_rsa_pkcs1_sha1 uint16 = 0x0201 + SigScheme_ecdsa_sha1 uint16 = 0x0203 + SigScheme_rsa_pkcs1_sha256 uint16 = 0x0401 + SigScheme_ecdsa_secp256r1_sha256 uint16 = 0x0403 + SigScheme_rsa_pkcs1_sha256_legacy uint16 = 0x0420 + SigScheme_rsa_pkcs1_sha384 uint16 = 0x0501 + SigScheme_ecdsa_secp384r1_sha384 uint16 = 0x0503 + SigScheme_rsa_pkcs1_sha384_legacy uint16 = 0x0520 + SigScheme_rsa_pkcs1_sha512 uint16 = 0x0601 + SigScheme_ecdsa_secp521r1_sha512 uint16 = 0x0603 + SigScheme_rsa_pkcs1_sha512_legacy uint16 = 0x0620 + SigScheme_eccsi_sha256 uint16 = 0x0704 + SigScheme_iso_ibs1 uint16 = 0x0705 + SigScheme_iso_ibs2 uint16 = 0x0706 + SigScheme_iso_chinese_ibs uint16 = 0x0707 + SigScheme_sm2sig_sm3 uint16 = 0x0708 + SigScheme_gostr34102012_256a uint16 = 0x0709 + SigScheme_gostr34102012_256b uint16 = 0x070A + SigScheme_gostr34102012_256c uint16 = 0x070B + SigScheme_gostr34102012_256d uint16 = 0x070C + SigScheme_gostr34102012_512a uint16 = 0x070D + SigScheme_gostr34102012_512b uint16 = 0x070E + SigScheme_gostr34102012_512c uint16 = 0x070F + SigScheme_rsa_pss_rsae_sha256 uint16 = 0x0804 + SigScheme_rsa_pss_rsae_sha384 uint16 = 0x0805 + SigScheme_rsa_pss_rsae_sha512 uint16 = 0x0806 + SigScheme_ed25519 uint16 = 0x0807 + SigScheme_ed448 uint16 = 0x0808 + SigScheme_rsa_pss_pss_sha256 uint16 = 0x0809 + SigScheme_rsa_pss_pss_sha384 uint16 = 0x080A + SigScheme_rsa_pss_pss_sha512 uint16 = 0x080B + SigScheme_ecdsa_brainpoolP256r1tls13_sha256 uint16 = 0x081A + SigScheme_ecdsa_brainpoolP384r1tls13_sha384 uint16 = 0x081B + SigScheme_ecdsa_brainpoolP512r1tls13_sha512 uint16 = 0x081C +) + +var DictSignatureSchemeValueIndexed = map[uint16]string{ + 0x0201: "rsa_pkcs1_sha1", + 0x0203: "ecdsa_sha1", + 0x0401: "rsa_pkcs1_sha256", + 0x0403: "ecdsa_secp256r1_sha256", + 0x0420: "rsa_pkcs1_sha256_legacy", + 0x0501: "rsa_pkcs1_sha384", + 0x0503: "ecdsa_secp384r1_sha384", + 0x0520: "rsa_pkcs1_sha384_legacy", + 0x0601: "rsa_pkcs1_sha512", + 0x0603: "ecdsa_secp521r1_sha512", + 0x0620: "rsa_pkcs1_sha512_legacy", + 0x0704: "eccsi_sha256", + 0x0705: "iso_ibs1", + 0x0706: "iso_ibs2", + 0x0707: "iso_chinese_ibs", + 0x0708: "sm2sig_sm3", + 0x0709: "gostr34102012_256a", + 0x070A: "gostr34102012_256b", + 0x070B: "gostr34102012_256c", + 0x070C: "gostr34102012_256d", + 0x070D: "gostr34102012_512a", + 0x070E: "gostr34102012_512b", + 0x070F: "gostr34102012_512c", + 0x0804: "rsa_pss_rsae_sha256", + 0x0805: "rsa_pss_rsae_sha384", + 0x0806: "rsa_pss_rsae_sha512", + 0x0807: "ed25519", + 0x0808: "ed448", + 0x0809: "rsa_pss_pss_sha256", + 0x080A: "rsa_pss_pss_sha384", + 0x080B: "rsa_pss_pss_sha512", + 0x081A: "ecdsa_brainpoolP256r1tls13_sha256", + 0x081B: "ecdsa_brainpoolP384r1tls13_sha384", + 0x081C: "ecdsa_brainpoolP512r1tls13_sha512", +} + +var DictSignatureSchemeNameIndexed = map[string]uint16{ + "rsa_pkcs1_sha1": 0x0201, + "Reserved for backward compatibility": 0x0202, + "ecdsa_sha1": 0x0203, + "rsa_pkcs1_sha256": 0x0401, + "ecdsa_secp256r1_sha256": 0x0403, + "rsa_pkcs1_sha256_legacy": 0x0420, + "rsa_pkcs1_sha384": 0x0501, + "ecdsa_secp384r1_sha384": 0x0503, + "rsa_pkcs1_sha384_legacy": 0x0520, + "rsa_pkcs1_sha512": 0x0601, + "ecdsa_secp521r1_sha512": 0x0603, + "rsa_pkcs1_sha512_legacy": 0x0620, + "eccsi_sha256": 0x0704, + "iso_ibs1": 0x0705, + "iso_ibs2": 0x0706, + "iso_chinese_ibs": 0x0707, + "sm2sig_sm3": 0x0708, + "gostr34102012_256a": 0x0709, + "gostr34102012_256b": 0x070A, + "gostr34102012_256c": 0x070B, + "gostr34102012_256d": 0x070C, + "gostr34102012_512a": 0x070D, + "gostr34102012_512b": 0x070E, + "gostr34102012_512c": 0x070F, + "rsa_pss_rsae_sha256": 0x0804, + "rsa_pss_rsae_sha384": 0x0805, + "rsa_pss_rsae_sha512": 0x0806, + "ed25519": 0x0807, + "ed448": 0x0808, + "rsa_pss_pss_sha256": 0x0809, + "rsa_pss_pss_sha384": 0x080A, + "rsa_pss_pss_sha512": 0x080B, + "ecdsa_brainpoolP256r1tls13_sha256": 0x081A, + "ecdsa_brainpoolP384r1tls13_sha384": 0x081B, + "ecdsa_brainpoolP512r1tls13_sha512": 0x081C, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/supplemental_data_formats.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/supplemental_data_formats.go new file mode 100644 index 0000000..9dd7f17 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/supplemental_data_formats.go @@ -0,0 +1,19 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-12 +// last updated: March 2023 + +const ( + SupplementalDataType_user_mapping_data uint16 = 0 + SupplementalDataType_authz_data uint16 = 16386 +) + +var DictSupplementalDataFormatValueIndexed = map[uint16]string{ + 0: "user_mapping_data", + 16386: "authz_data", +} + +var DictSupplementalDataFormatNameIndexed = map[string]uint16{ + "user_mapping_data": 0, + "authz_data": 16386, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/supported_groups.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/supported_groups.go new file mode 100644 index 0000000..7c5cb54 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/supported_groups.go @@ -0,0 +1,157 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-8 +// last updated: March 2023 + +const ( + SupportedGroups_sect163k1 uint16 = 1 + SupportedGroups_sect163r1 uint16 = 2 + SupportedGroups_sect163r2 uint16 = 3 + SupportedGroups_sect193r1 uint16 = 4 + SupportedGroups_sect193r2 uint16 = 5 + SupportedGroups_sect233k1 uint16 = 6 + SupportedGroups_sect233r1 uint16 = 7 + SupportedGroups_sect239k1 uint16 = 8 + SupportedGroups_sect283k1 uint16 = 9 + SupportedGroups_sect283r1 uint16 = 10 + SupportedGroups_sect409k1 uint16 = 11 + SupportedGroups_sect409r1 uint16 = 12 + SupportedGroups_sect571k1 uint16 = 13 + SupportedGroups_sect571r1 uint16 = 14 + SupportedGroups_secp160k1 uint16 = 15 + SupportedGroups_secp160r1 uint16 = 16 + SupportedGroups_secp160r2 uint16 = 17 + SupportedGroups_secp192k1 uint16 = 18 + SupportedGroups_secp192r1 uint16 = 19 + SupportedGroups_secp224k1 uint16 = 20 + SupportedGroups_secp224r1 uint16 = 21 + SupportedGroups_secp256k1 uint16 = 22 + SupportedGroups_secp256r1 uint16 = 23 + SupportedGroups_secp384r1 uint16 = 24 + SupportedGroups_secp521r1 uint16 = 25 + SupportedGroups_brainpoolP256r1 uint16 = 26 + SupportedGroups_brainpoolP384r1 uint16 = 27 + SupportedGroups_brainpoolP512r1 uint16 = 28 + SupportedGroups_x25519 uint16 = 29 + SupportedGroups_x448 uint16 = 30 + SupportedGroups_brainpoolP256r1tls13 uint16 = 31 + SupportedGroups_brainpoolP384r1tls13 uint16 = 32 + SupportedGroups_brainpoolP512r1tls13 uint16 = 33 + SupportedGroups_GC256A uint16 = 34 + SupportedGroups_GC256B uint16 = 35 + SupportedGroups_GC256C uint16 = 36 + SupportedGroups_GC256D uint16 = 37 + SupportedGroups_GC512A uint16 = 38 + SupportedGroups_GC512B uint16 = 39 + SupportedGroups_GC512C uint16 = 40 + SupportedGroups_curveSM2 uint16 = 41 + SupportedGroups_ffdhe2048 uint16 = 256 + SupportedGroups_ffdhe3072 uint16 = 257 + SupportedGroups_ffdhe4096 uint16 = 258 + SupportedGroups_ffdhe6144 uint16 = 259 + SupportedGroups_ffdhe8192 uint16 = 260 + SupportedGroups_arbitrary_explicit_prime_curves uint16 = 65281 + SupportedGroups_arbitrary_explicit_char2_curves uint16 = 65282 +) + +var DictSupportedGroupsValueIndexed = map[uint16]string{ + 1: "sect163k1", + 2: "sect163r1", + 3: "sect163r2", + 4: "sect193r1", + 5: "sect193r2", + 6: "sect233k1", + 7: "sect233r1", + 8: "sect239k1", + 9: "sect283k1", + 10: "sect283r1", + 11: "sect409k1", + 12: "sect409r1", + 13: "sect571k1", + 14: "sect571r1", + 15: "secp160k1", + 16: "secp160r1", + 17: "secp160r2", + 18: "secp192k1", + 19: "secp192r1", + 20: "secp224k1", + 21: "secp224r1", + 22: "secp256k1", + 23: "secp256r1", + 24: "secp384r1", + 25: "secp521r1", + 26: "brainpoolP256r1", + 27: "brainpoolP384r1", + 28: "brainpoolP512r1", + 29: "x25519", + 30: "x448", + 31: "brainpoolP256r1tls13", + 32: "brainpoolP384r1tls13", + 33: "brainpoolP512r1tls13", + 34: "GC256A", + 35: "GC256B", + 36: "GC256C", + 37: "GC256D", + 38: "GC512A", + 39: "GC512B", + 40: "GC512C", + 41: "curveSM2", + 256: "ffdhe2048", + 257: "ffdhe3072", + 258: "ffdhe4096", + 259: "ffdhe6144", + 260: "ffdhe8192", + 65281: "arbitrary_explicit_prime_curves", + 65282: "arbitrary_explicit_char2_curves", +} + +var DictSupportedGroupsNameIndexed = map[string]uint16{ + "sect163k1": 1, + "sect163r1": 2, + "sect163r2": 3, + "sect193r1": 4, + "sect193r2": 5, + "sect233k1": 6, + "sect233r1": 7, + "sect239k1": 8, + "sect283k1": 9, + "sect283r1": 10, + "sect409k1": 11, + "sect409r1": 12, + "sect571k1": 13, + "sect571r1": 14, + "secp160k1": 15, + "secp160r1": 16, + "secp160r2": 17, + "secp192k1": 18, + "secp192r1": 19, + "secp224k1": 20, + "secp224r1": 21, + "secp256k1": 22, + "secp256r1": 23, + "secp384r1": 24, + "secp521r1": 25, + "brainpoolP256r1": 26, + "brainpoolP384r1": 27, + "brainpoolP512r1": 28, + "x25519": 29, + "x448": 30, + "brainpoolP256r1tls13": 31, + "brainpoolP384r1tls13": 32, + "brainpoolP512r1tls13": 33, + "GC256A": 34, + "GC256B": 35, + "GC256C": 36, + "GC256D": 37, + "GC512A": 38, + "GC512B": 39, + "GC512C": 40, + "curveSM2": 41, + "ffdhe2048": 256, + "ffdhe3072": 257, + "ffdhe4096": 258, + "ffdhe6144": 259, + "ffdhe8192": 260, + "arbitrary_explicit_prime_curves": 65281, + "arbitrary_explicit_char2_curves": 65282, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/dicttls/usermappingtype_values.go b/backend/vendor/github.com/refraction-networking/utls/dicttls/usermappingtype_values.go new file mode 100644 index 0000000..a16d071 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/dicttls/usermappingtype_values.go @@ -0,0 +1,16 @@ +package dicttls + +// source: https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-14 +// last updated: March 2023 + +const ( + UserMappingType_upn_domain_hint uint8 = 64 +) + +var DictUserMappingTypeValueIndexed = map[uint8]string{ + 64: "upn_domain_hint", +} + +var DictUserMappingTypeNameIndexed = map[string]uint8{ + "upn_domain_hint": 64, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/ech.go b/backend/vendor/github.com/refraction-networking/utls/ech.go new file mode 100644 index 0000000..184c468 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/ech.go @@ -0,0 +1,646 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bytes" + "errors" + "fmt" + "slices" + "strings" + + "github.com/refraction-networking/utls/internal/hpke" + + "golang.org/x/crypto/cryptobyte" +) + +// sortedSupportedAEADs is just a sorted version of hpke.SupportedAEADS. +// We need this so that when we insert them into ECHConfigs the ordering +// is stable. +var sortedSupportedAEADs []uint16 + +func init() { + for aeadID := range hpke.SupportedAEADs { + sortedSupportedAEADs = append(sortedSupportedAEADs, aeadID) + } + slices.Sort(sortedSupportedAEADs) +} + +type echCipher struct { + KDFID uint16 + AEADID uint16 +} + +type echExtension struct { + Type uint16 + Data []byte +} + +type echConfig struct { + raw []byte + + Version uint16 + Length uint16 + + ConfigID uint8 + KemID uint16 + PublicKey []byte + SymmetricCipherSuite []echCipher + + MaxNameLength uint8 + PublicName []byte + Extensions []echExtension +} + +var errMalformedECHConfig = errors.New("tls: malformed ECHConfigList") + +func parseECHConfig(enc []byte) (skip bool, ec echConfig, err error) { + s := cryptobyte.String(enc) + ec.raw = []byte(enc) + if !s.ReadUint16(&ec.Version) { + return false, echConfig{}, errMalformedECHConfig + } + if !s.ReadUint16(&ec.Length) { + return false, echConfig{}, errMalformedECHConfig + } + if len(ec.raw) < int(ec.Length)+4 { + return false, echConfig{}, errMalformedECHConfig + } + ec.raw = ec.raw[:ec.Length+4] + if ec.Version != extensionEncryptedClientHello { + s.Skip(int(ec.Length)) + return true, echConfig{}, nil + } + if !s.ReadUint8(&ec.ConfigID) { + return false, echConfig{}, errMalformedECHConfig + } + if !s.ReadUint16(&ec.KemID) { + return false, echConfig{}, errMalformedECHConfig + } + if !readUint16LengthPrefixed(&s, &ec.PublicKey) { + return false, echConfig{}, errMalformedECHConfig + } + var cipherSuites cryptobyte.String + if !s.ReadUint16LengthPrefixed(&cipherSuites) { + return false, echConfig{}, errMalformedECHConfig + } + for !cipherSuites.Empty() { + var c echCipher + if !cipherSuites.ReadUint16(&c.KDFID) { + return false, echConfig{}, errMalformedECHConfig + } + if !cipherSuites.ReadUint16(&c.AEADID) { + return false, echConfig{}, errMalformedECHConfig + } + ec.SymmetricCipherSuite = append(ec.SymmetricCipherSuite, c) + } + if !s.ReadUint8(&ec.MaxNameLength) { + return false, echConfig{}, errMalformedECHConfig + } + var publicName cryptobyte.String + if !s.ReadUint8LengthPrefixed(&publicName) { + return false, echConfig{}, errMalformedECHConfig + } + ec.PublicName = publicName + var extensions cryptobyte.String + if !s.ReadUint16LengthPrefixed(&extensions) { + return false, echConfig{}, errMalformedECHConfig + } + for !extensions.Empty() { + var e echExtension + if !extensions.ReadUint16(&e.Type) { + return false, echConfig{}, errMalformedECHConfig + } + if !extensions.ReadUint16LengthPrefixed((*cryptobyte.String)(&e.Data)) { + return false, echConfig{}, errMalformedECHConfig + } + ec.Extensions = append(ec.Extensions, e) + } + + return false, ec, nil +} + +// parseECHConfigList parses a draft-ietf-tls-esni-18 ECHConfigList, returning a +// slice of parsed ECHConfigs, in the same order they were parsed, or an error +// if the list is malformed. +func parseECHConfigList(data []byte) ([]echConfig, error) { + s := cryptobyte.String(data) + var length uint16 + if !s.ReadUint16(&length) { + return nil, errMalformedECHConfig + } + if length != uint16(len(data)-2) { + return nil, errMalformedECHConfig + } + var configs []echConfig + for len(s) > 0 { + if len(s) < 4 { + return nil, errors.New("tls: malformed ECHConfig") + } + configLen := uint16(s[2])<<8 | uint16(s[3]) + skip, ec, err := parseECHConfig(s) + if err != nil { + return nil, err + } + s = s[configLen+4:] + if !skip { + configs = append(configs, ec) + } + } + return configs, nil +} + +func pickECHConfig(list []echConfig) *echConfig { + for _, ec := range list { + if _, ok := hpke.SupportedKEMs[ec.KemID]; !ok { + continue + } + var validSCS bool + for _, cs := range ec.SymmetricCipherSuite { + if _, ok := hpke.SupportedAEADs[cs.AEADID]; !ok { + continue + } + if _, ok := hpke.SupportedKDFs[cs.KDFID]; !ok { + continue + } + validSCS = true + break + } + if !validSCS { + continue + } + if !validDNSName(string(ec.PublicName)) { + continue + } + var unsupportedExt bool + for _, ext := range ec.Extensions { + // If high order bit is set to 1 the extension is mandatory. + // Since we don't support any extensions, if we see a mandatory + // bit, we skip the config. + if ext.Type&uint16(1<<15) != 0 { + unsupportedExt = true + } + } + if unsupportedExt { + continue + } + return &ec + } + return nil +} + +func pickECHCipherSuite(suites []echCipher) (echCipher, error) { + for _, s := range suites { + // NOTE: all of the supported AEADs and KDFs are fine, rather than + // imposing some sort of preference here, we just pick the first valid + // suite. + if _, ok := hpke.SupportedAEADs[s.AEADID]; !ok { + continue + } + if _, ok := hpke.SupportedKDFs[s.KDFID]; !ok { + continue + } + return s, nil + } + return echCipher{}, errors.New("tls: no supported symmetric ciphersuites for ECH") +} + +// [uTLS SECTION BEGIN] +func encodeInnerClientHello(inner *clientHelloMsg, maxNameLength int) ([]byte, error) { + return encodeInnerClientHelloReorderOuterExts(inner, maxNameLength, nil) +} + +// [uTLS SECTION END] + +// func encodeInnerClientHello(inner *clientHelloMsg, maxNameLength int) ([]byte, error) { +func encodeInnerClientHelloReorderOuterExts(inner *clientHelloMsg, maxNameLength int, outerExts []uint16) ([]byte, error) { // uTLS + h, err := inner.marshalMsgReorderOuterExts(true, outerExts) + if err != nil { + return nil, err + } + h = h[4:] // strip four byte prefix + + var paddingLen int + if inner.serverName != "" { + paddingLen = max(0, maxNameLength-len(inner.serverName)) + } else { + paddingLen = maxNameLength + 9 + } + paddingLen = 31 - ((len(h) + paddingLen - 1) % 32) + + return append(h, make([]byte, paddingLen)...), nil +} + +func skipUint8LengthPrefixed(s *cryptobyte.String) bool { + var skip uint8 + if !s.ReadUint8(&skip) { + return false + } + return s.Skip(int(skip)) +} + +func skipUint16LengthPrefixed(s *cryptobyte.String) bool { + var skip uint16 + if !s.ReadUint16(&skip) { + return false + } + return s.Skip(int(skip)) +} + +type rawExtension struct { + extType uint16 + data []byte +} + +func extractRawExtensions(hello *clientHelloMsg) ([]rawExtension, error) { + s := cryptobyte.String(hello.original) + if !s.Skip(4+2+32) || // header, version, random + !skipUint8LengthPrefixed(&s) || // session ID + !skipUint16LengthPrefixed(&s) || // cipher suites + !skipUint8LengthPrefixed(&s) { // compression methods + return nil, errors.New("tls: malformed outer client hello") + } + var rawExtensions []rawExtension + var extensions cryptobyte.String + if !s.ReadUint16LengthPrefixed(&extensions) { + return nil, errors.New("tls: malformed outer client hello") + } + + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return nil, errors.New("tls: invalid inner client hello") + } + rawExtensions = append(rawExtensions, rawExtension{extension, extData}) + } + return rawExtensions, nil +} + +func decodeInnerClientHello(outer *clientHelloMsg, encoded []byte) (*clientHelloMsg, error) { + // Reconstructing the inner client hello from its encoded form is somewhat + // complicated. It is missing its header (message type and length), session + // ID, and the extensions may be compressed. Since we need to put the + // extensions back in the same order as they were in the raw outer hello, + // and since we don't store the raw extensions, or the order we parsed them + // in, we need to reparse the raw extensions from the outer hello in order + // to properly insert them into the inner hello. This _should_ result in raw + // bytes which match the hello as it was generated by the client. + innerReader := cryptobyte.String(encoded) + var versionAndRandom, sessionID, cipherSuites, compressionMethods []byte + var extensions cryptobyte.String + if !innerReader.ReadBytes(&versionAndRandom, 2+32) || + !readUint8LengthPrefixed(&innerReader, &sessionID) || + len(sessionID) != 0 || + !readUint16LengthPrefixed(&innerReader, &cipherSuites) || + !readUint8LengthPrefixed(&innerReader, &compressionMethods) || + !innerReader.ReadUint16LengthPrefixed(&extensions) { + return nil, errors.New("tls: invalid inner client hello") + } + + // The specification says we must verify that the trailing padding is all + // zeros. This is kind of weird for TLS messages, where we generally just + // throw away any trailing garbage. + for _, p := range innerReader { + if p != 0 { + return nil, errors.New("tls: invalid inner client hello") + } + } + + rawOuterExts, err := extractRawExtensions(outer) + if err != nil { + return nil, err + } + + recon := cryptobyte.NewBuilder(nil) + recon.AddUint8(typeClientHello) + recon.AddUint24LengthPrefixed(func(recon *cryptobyte.Builder) { + recon.AddBytes(versionAndRandom) + recon.AddUint8LengthPrefixed(func(recon *cryptobyte.Builder) { + recon.AddBytes(outer.sessionId) + }) + recon.AddUint16LengthPrefixed(func(recon *cryptobyte.Builder) { + recon.AddBytes(cipherSuites) + }) + recon.AddUint8LengthPrefixed(func(recon *cryptobyte.Builder) { + recon.AddBytes(compressionMethods) + }) + recon.AddUint16LengthPrefixed(func(recon *cryptobyte.Builder) { + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + recon.SetError(errors.New("tls: invalid inner client hello")) + return + } + if extension == extensionECHOuterExtensions { + if !extData.ReadUint8LengthPrefixed(&extData) { + recon.SetError(errors.New("tls: invalid inner client hello")) + return + } + var i int + for !extData.Empty() { + var extType uint16 + if !extData.ReadUint16(&extType) { + recon.SetError(errors.New("tls: invalid inner client hello")) + return + } + if extType == extensionEncryptedClientHello { + recon.SetError(errors.New("tls: invalid outer extensions")) + return + } + for ; i <= len(rawOuterExts); i++ { + if i == len(rawOuterExts) { + recon.SetError(errors.New("tls: invalid outer extensions")) + return + } + if rawOuterExts[i].extType == extType { + break + } + } + recon.AddUint16(rawOuterExts[i].extType) + recon.AddUint16LengthPrefixed(func(recon *cryptobyte.Builder) { + recon.AddBytes(rawOuterExts[i].data) + }) + } + } else { + recon.AddUint16(extension) + recon.AddUint16LengthPrefixed(func(recon *cryptobyte.Builder) { + recon.AddBytes(extData) + }) + } + } + }) + }) + + reconBytes, err := recon.Bytes() + if err != nil { + return nil, err + } + inner := &clientHelloMsg{} + if !inner.unmarshal(reconBytes) { + return nil, errors.New("tls: invalid reconstructed inner client hello") + } + + if !bytes.Equal(inner.encryptedClientHello, []byte{uint8(innerECHExt)}) { + return nil, errInvalidECHExt + } + + if len(inner.supportedVersions) != 1 || (len(inner.supportedVersions) >= 1 && inner.supportedVersions[0] != VersionTLS13) { + return nil, errors.New("tls: client sent encrypted_client_hello extension and offered incompatible versions") + } + + return inner, nil +} + +func decryptECHPayload(context *hpke.Receipient, hello, payload []byte) ([]byte, error) { + outerAAD := bytes.Replace(hello[4:], payload, make([]byte, len(payload)), 1) + return context.Open(outerAAD, payload) +} + +func generateOuterECHExt(id uint8, kdfID, aeadID uint16, encodedKey []byte, payload []byte) ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(0) // outer + b.AddUint16(kdfID) + b.AddUint16(aeadID) + b.AddUint8(id) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { b.AddBytes(encodedKey) }) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { b.AddBytes(payload) }) + return b.Bytes() +} + +func computeAndUpdateOuterECHExtension(outer, inner *clientHelloMsg, ech *echClientContext, useKey bool) error { + var encapKey []byte + if useKey { + encapKey = ech.encapsulatedKey + } + encodedInner, err := encodeInnerClientHello(inner, int(ech.config.MaxNameLength)) + if err != nil { + return err + } + // NOTE: the tag lengths for all of the supported AEADs are the same (16 + // bytes), so we have hardcoded it here. If we add support for another AEAD + // with a different tag length, we will need to change this. + encryptedLen := len(encodedInner) + 16 // AEAD tag length + outer.encryptedClientHello, err = generateOuterECHExt(ech.config.ConfigID, ech.kdfID, ech.aeadID, encapKey, make([]byte, encryptedLen)) + if err != nil { + return err + } + serializedOuter, err := outer.marshal() + if err != nil { + return err + } + serializedOuter = serializedOuter[4:] // strip the four byte prefix + encryptedInner, err := ech.hpkeContext.Seal(serializedOuter, encodedInner) + if err != nil { + return err + } + outer.encryptedClientHello, err = generateOuterECHExt(ech.config.ConfigID, ech.kdfID, ech.aeadID, encapKey, encryptedInner) + if err != nil { + return err + } + return nil +} + +// validDNSName is a rather rudimentary check for the validity of a DNS name. +// This is used to check if the public_name in a ECHConfig is valid when we are +// picking a config. This can be somewhat lax because even if we pick a +// valid-looking name, the DNS layer will later reject it anyway. +func validDNSName(name string) bool { + if len(name) > 253 { + return false + } + labels := strings.Split(name, ".") + if len(labels) <= 1 { + return false + } + for _, l := range labels { + labelLen := len(l) + if labelLen == 0 { + return false + } + for i, r := range l { + if r == '-' && (i == 0 || i == labelLen-1) { + return false + } + if (r < '0' || r > '9') && (r < 'a' || r > 'z') && (r < 'A' || r > 'Z') && r != '-' { + return false + } + } + } + return true +} + +// ECHRejectionError is the error type returned when ECH is rejected by a remote +// server. If the server offered a ECHConfigList to use for retries, the +// RetryConfigList field will contain this list. +// +// The client may treat an ECHRejectionError with an empty set of RetryConfigs +// as a secure signal from the server. +type ECHRejectionError struct { + RetryConfigList []byte +} + +func (e *ECHRejectionError) Error() string { + return "tls: server rejected ECH" +} + +var errMalformedECHExt = errors.New("tls: malformed encrypted_client_hello extension") +var errInvalidECHExt = errors.New("tls: client sent invalid encrypted_client_hello extension") + +type echExtType uint8 + +const ( + innerECHExt echExtType = 1 + outerECHExt echExtType = 0 +) + +func parseECHExt(ext []byte) (echType echExtType, cs echCipher, configID uint8, encap []byte, payload []byte, err error) { + data := make([]byte, len(ext)) + copy(data, ext) + s := cryptobyte.String(data) + var echInt uint8 + if !s.ReadUint8(&echInt) { + err = errMalformedECHExt + return + } + echType = echExtType(echInt) + if echType == innerECHExt { + if !s.Empty() { + err = errMalformedECHExt + return + } + return echType, cs, 0, nil, nil, nil + } + if echType != outerECHExt { + err = errInvalidECHExt + return + } + if !s.ReadUint16(&cs.KDFID) { + err = errMalformedECHExt + return + } + if !s.ReadUint16(&cs.AEADID) { + err = errMalformedECHExt + return + } + if !s.ReadUint8(&configID) { + err = errMalformedECHExt + return + } + if !readUint16LengthPrefixed(&s, &encap) { + err = errMalformedECHExt + return + } + if !readUint16LengthPrefixed(&s, &payload) { + err = errMalformedECHExt + return + } + + // NOTE: clone encap and payload so that mutating them does not mutate the + // raw extension bytes. + return echType, cs, configID, bytes.Clone(encap), bytes.Clone(payload), nil +} + +func marshalEncryptedClientHelloConfigList(configs []EncryptedClientHelloKey) ([]byte, error) { + builder := cryptobyte.NewBuilder(nil) + builder.AddUint16LengthPrefixed(func(builder *cryptobyte.Builder) { + for _, c := range configs { + builder.AddBytes(c.Config) + } + }) + return builder.Bytes() +} + +func (c *Conn) processECHClientHello(outer *clientHelloMsg) (*clientHelloMsg, *echServerContext, error) { + echType, echCiphersuite, configID, encap, payload, err := parseECHExt(outer.encryptedClientHello) + if err != nil { + if errors.Is(err, errInvalidECHExt) { + c.sendAlert(alertIllegalParameter) + } else { + c.sendAlert(alertDecodeError) + } + + return nil, nil, errInvalidECHExt + } + + if echType == innerECHExt { + return outer, &echServerContext{inner: true}, nil + } + + if len(c.config.EncryptedClientHelloKeys) == 0 { + return outer, nil, nil + } + + for _, echKey := range c.config.EncryptedClientHelloKeys { + skip, config, err := parseECHConfig(echKey.Config) + if err != nil || skip { + c.sendAlert(alertInternalError) + return nil, nil, fmt.Errorf("tls: invalid EncryptedClientHelloKeys Config: %s", err) + } + if skip { + continue + } + echPriv, err := hpke.ParseHPKEPrivateKey(config.KemID, echKey.PrivateKey) + if err != nil { + c.sendAlert(alertInternalError) + return nil, nil, fmt.Errorf("tls: invalid EncryptedClientHelloKeys PrivateKey: %s", err) + } + info := append([]byte("tls ech\x00"), echKey.Config...) + hpkeContext, err := hpke.SetupReceipient(hpke.DHKEM_X25519_HKDF_SHA256, echCiphersuite.KDFID, echCiphersuite.AEADID, echPriv, info, encap) + if err != nil { + // attempt next trial decryption + continue + } + + encodedInner, err := decryptECHPayload(hpkeContext, outer.original, payload) + if err != nil { + // attempt next trial decryption + continue + } + + // NOTE: we do not enforce that the sent server_name matches the ECH + // configs PublicName, since this is not particularly important, and + // the client already had to know what it was in order to properly + // encrypt the payload. This is only a MAY in the spec, so we're not + // doing anything revolutionary. + + echInner, err := decodeInnerClientHello(outer, encodedInner) + if err != nil { + c.sendAlert(alertIllegalParameter) + return nil, nil, errInvalidECHExt + } + + c.echAccepted = true + + return echInner, &echServerContext{ + hpkeContext: hpkeContext, + configID: configID, + ciphersuite: echCiphersuite, + }, nil + } + + return outer, nil, nil +} + +func buildRetryConfigList(keys []EncryptedClientHelloKey) ([]byte, error) { + var atLeastOneRetryConfig bool + var retryBuilder cryptobyte.Builder + retryBuilder.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + for _, c := range keys { + if !c.SendAsRetry { + continue + } + atLeastOneRetryConfig = true + b.AddBytes(c.Config) + } + }) + if !atLeastOneRetryConfig { + return nil, nil + } + return retryBuilder.Bytes() +} diff --git a/backend/vendor/github.com/refraction-networking/utls/handshake_client.go b/backend/vendor/github.com/refraction-networking/utls/handshake_client.go new file mode 100644 index 0000000..91cf41b --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/handshake_client.go @@ -0,0 +1,1372 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bytes" + "context" + "crypto" + "crypto/ecdsa" + "crypto/ed25519" + "crypto/mlkem" + "crypto/rsa" + "crypto/subtle" + "crypto/x509" + "errors" + "fmt" + "hash" + "io" + "net" + "slices" + "strings" + "time" + + "github.com/refraction-networking/utls/internal/byteorder" + "github.com/refraction-networking/utls/internal/fips140tls" + "github.com/refraction-networking/utls/internal/hpke" + "github.com/refraction-networking/utls/internal/tls13" + + circlSign "github.com/cloudflare/circl/sign" +) + +type clientHandshakeState struct { + c *Conn + ctx context.Context + serverHello *serverHelloMsg + hello *clientHelloMsg + suite *cipherSuite + finishedHash finishedHash + masterSecret []byte + session *SessionState // the session being resumed + ticket []byte // a fresh ticket received during this handshake + + uconn *UConn // [uTLS] +} + +var testingOnlyForceClientHelloSignatureAlgorithms []SignatureScheme + +func (c *Conn) makeClientHello() (*clientHelloMsg, *keySharePrivateKeys, *echClientContext, error) { + config := c.config + + // [UTLS SECTION START] + if len(config.ServerName) == 0 && !config.InsecureSkipVerify && len(config.InsecureServerNameToVerify) == 0 { + return nil, nil, nil, errors.New("tls: at least one of ServerName, InsecureSkipVerify or InsecureServerNameToVerify must be specified in the tls.Config") + } + // [UTLS SECTION END] + + nextProtosLength := 0 + for _, proto := range config.NextProtos { + if l := len(proto); l == 0 || l > 255 { + return nil, nil, nil, errors.New("tls: invalid NextProtos value") + } else { + nextProtosLength += 1 + l + } + } + if nextProtosLength > 0xffff { + return nil, nil, nil, errors.New("tls: NextProtos values too large") + } + + supportedVersions := config.supportedVersions(roleClient) + if len(supportedVersions) == 0 { + return nil, nil, nil, errors.New("tls: no supported versions satisfy MinVersion and MaxVersion") + } + maxVersion := config.maxSupportedVersion(roleClient) + + hello := &clientHelloMsg{ + vers: maxVersion, + compressionMethods: []uint8{compressionNone}, + random: make([]byte, 32), + extendedMasterSecret: true, + ocspStapling: true, + scts: true, + serverName: hostnameInSNI(config.ServerName), + supportedCurves: config.curvePreferences(maxVersion), + supportedPoints: []uint8{pointFormatUncompressed}, + secureRenegotiationSupported: true, + alpnProtocols: config.NextProtos, + supportedVersions: supportedVersions, + } + + // The version at the beginning of the ClientHello was capped at TLS 1.2 + // for compatibility reasons. The supported_versions extension is used + // to negotiate versions now. See RFC 8446, Section 4.2.1. + if hello.vers > VersionTLS12 { + hello.vers = VersionTLS12 + } + + if c.handshakes > 0 { + hello.secureRenegotiation = c.clientFinished[:] + } + + preferenceOrder := cipherSuitesPreferenceOrder + if !hasAESGCMHardwareSupport { + preferenceOrder = cipherSuitesPreferenceOrderNoAES + } + configCipherSuites := config.cipherSuites() + hello.cipherSuites = make([]uint16, 0, len(configCipherSuites)) + + for _, suiteId := range preferenceOrder { + suite := mutualCipherSuite(configCipherSuites, suiteId) + if suite == nil { + continue + } + // Don't advertise TLS 1.2-only cipher suites unless + // we're attempting TLS 1.2. + if maxVersion < VersionTLS12 && suite.flags&suiteTLS12 != 0 { + continue + } + hello.cipherSuites = append(hello.cipherSuites, suiteId) + } + + _, err := io.ReadFull(config.rand(), hello.random) + if err != nil { + return nil, nil, nil, errors.New("tls: short read from Rand: " + err.Error()) + } + + // A random session ID is used to detect when the server accepted a ticket + // and is resuming a session (see RFC 5077). In TLS 1.3, it's always set as + // a compatibility measure (see RFC 8446, Section 4.1.2). + // + // The session ID is not set for QUIC connections (see RFC 9001, Section 8.4). + if c.quic == nil { + hello.sessionId = make([]byte, 32) + if _, err := io.ReadFull(config.rand(), hello.sessionId); err != nil { + return nil, nil, nil, errors.New("tls: short read from Rand: " + err.Error()) + } + } + + if maxVersion >= VersionTLS12 { + hello.supportedSignatureAlgorithms = supportedSignatureAlgorithms() + } + if testingOnlyForceClientHelloSignatureAlgorithms != nil { + hello.supportedSignatureAlgorithms = testingOnlyForceClientHelloSignatureAlgorithms + } + + var keyShareKeys *keySharePrivateKeys + if hello.supportedVersions[0] == VersionTLS13 { + // Reset the list of ciphers when the client only supports TLS 1.3. + if len(hello.supportedVersions) == 1 { + hello.cipherSuites = nil + } + if fips140tls.Required() { + hello.cipherSuites = append(hello.cipherSuites, defaultCipherSuitesTLS13FIPS...) + } else if hasAESGCMHardwareSupport { + hello.cipherSuites = append(hello.cipherSuites, defaultCipherSuitesTLS13...) + } else { + hello.cipherSuites = append(hello.cipherSuites, defaultCipherSuitesTLS13NoAES...) + } + + if len(hello.supportedCurves) == 0 { + return nil, nil, nil, errors.New("tls: no supported elliptic curves for ECDHE") + } + curveID := hello.supportedCurves[0] + keyShareKeys = &keySharePrivateKeys{curveID: curveID} + // Note that if X25519MLKEM768 is supported, it will be first because + // the preference order is fixed. + if curveID == X25519MLKEM768 { + keyShareKeys.ecdhe, err = generateECDHEKey(config.rand(), X25519) + if err != nil { + return nil, nil, nil, err + } + seed := make([]byte, mlkem.SeedSize) + if _, err := io.ReadFull(config.rand(), seed); err != nil { + return nil, nil, nil, err + } + keyShareKeys.mlkem, err = mlkem.NewDecapsulationKey768(seed) + if err != nil { + return nil, nil, nil, err + } + mlkemEncapsulationKey := keyShareKeys.mlkem.EncapsulationKey().Bytes() + x25519EphemeralKey := keyShareKeys.ecdhe.PublicKey().Bytes() + hello.keyShares = []keyShare{ + {group: X25519MLKEM768, data: append(mlkemEncapsulationKey, x25519EphemeralKey...)}, + } + // If both X25519MLKEM768 and X25519 are supported, we send both key + // shares (as a fallback) and we reuse the same X25519 ephemeral + // key, as allowed by draft-ietf-tls-hybrid-design-09, Section 3.2. + if slices.Contains(hello.supportedCurves, X25519) { + hello.keyShares = append(hello.keyShares, keyShare{group: X25519, data: x25519EphemeralKey}) + } + } else { + if _, ok := curveForCurveID(curveID); !ok { + return nil, nil, nil, errors.New("tls: CurvePreferences includes unsupported curve") + } + keyShareKeys.ecdhe, err = generateECDHEKey(config.rand(), curveID) + if err != nil { + return nil, nil, nil, err + } + hello.keyShares = []keyShare{{group: curveID, data: keyShareKeys.ecdhe.PublicKey().Bytes()}} + } + } + + if c.quic != nil { + p, err := c.quicGetTransportParameters() + if err != nil { + return nil, nil, nil, err + } + if p == nil { + p = []byte{} + } + hello.quicTransportParameters = p + } + + var ech *echClientContext + if c.config.EncryptedClientHelloConfigList != nil { + if c.config.MinVersion != 0 && c.config.MinVersion < VersionTLS13 { + return nil, nil, nil, errors.New("tls: MinVersion must be >= VersionTLS13 if EncryptedClientHelloConfigList is populated") + } + if c.config.MaxVersion != 0 && c.config.MaxVersion <= VersionTLS12 { + return nil, nil, nil, errors.New("tls: MaxVersion must be >= VersionTLS13 if EncryptedClientHelloConfigList is populated") + } + echConfigs, err := parseECHConfigList(c.config.EncryptedClientHelloConfigList) + if err != nil { + return nil, nil, nil, err + } + echConfig := pickECHConfig(echConfigs) + if echConfig == nil { + return nil, nil, nil, errors.New("tls: EncryptedClientHelloConfigList contains no valid configs") + } + ech = &echClientContext{config: echConfig} + hello.encryptedClientHello = []byte{1} // indicate inner hello + // We need to explicitly set these 1.2 fields to nil, as we do not + // marshal them when encoding the inner hello, otherwise transcripts + // will later mismatch. + hello.supportedPoints = nil + hello.ticketSupported = false + hello.secureRenegotiationSupported = false + hello.extendedMasterSecret = false + + echPK, err := hpke.ParseHPKEPublicKey(ech.config.KemID, ech.config.PublicKey) + if err != nil { + return nil, nil, nil, err + } + suite, err := pickECHCipherSuite(ech.config.SymmetricCipherSuite) + if err != nil { + return nil, nil, nil, err + } + ech.kdfID, ech.aeadID = suite.KDFID, suite.AEADID + info := append([]byte("tls ech\x00"), ech.config.raw...) + ech.encapsulatedKey, ech.hpkeContext, err = hpke.SetupSender(ech.config.KemID, suite.KDFID, suite.AEADID, echPK, info) + if err != nil { + return nil, nil, nil, err + } + } + + return hello, keyShareKeys, ech, nil +} + +type echClientContext struct { + config *echConfig + hpkeContext *hpke.Sender + encapsulatedKey []byte + innerHello *clientHelloMsg + innerTranscript hash.Hash + kdfID uint16 + aeadID uint16 + echRejected bool + retryConfigs []byte +} + +func (c *Conn) clientHandshake(ctx context.Context) (err error) { + if c.config == nil { + c.config = defaultConfig() + } + + // This may be a renegotiation handshake, in which case some fields + // need to be reset. + c.didResume = false + + hello, keyShareKeys, ech, err := c.makeClientHello() + if err != nil { + return err + } + + session, earlySecret, binderKey, err := c.loadSession(hello) + if err != nil { + return err + } + if session != nil { + defer func() { + // If we got a handshake failure when resuming a session, throw away + // the session ticket. See RFC 5077, Section 3.2. + // + // RFC 8446 makes no mention of dropping tickets on failure, but it + // does require servers to abort on invalid binders, so we need to + // delete tickets to recover from a corrupted PSK. + if err != nil { + if cacheKey := c.clientSessionCacheKey(); cacheKey != "" { + c.config.ClientSessionCache.Put(cacheKey, nil) + } + } + }() + } + + if ech != nil { + // Split hello into inner and outer + ech.innerHello = hello.clone() + + // Overwrite the server name in the outer hello with the public facing + // name. + hello.serverName = string(ech.config.PublicName) + // Generate a new random for the outer hello. + hello.random = make([]byte, 32) + _, err = io.ReadFull(c.config.rand(), hello.random) + if err != nil { + return errors.New("tls: short read from Rand: " + err.Error()) + } + + // NOTE: we don't do PSK GREASE, in line with boringssl, it's meant to + // work around _possibly_ broken middleboxes, but there is little-to-no + // evidence that this is actually a problem. + + if err := computeAndUpdateOuterECHExtension(hello, ech.innerHello, ech, true); err != nil { + return err + } + } + + c.serverName = hello.serverName + + if _, err := c.writeHandshakeRecord(hello, nil); err != nil { + return err + } + + if hello.earlyData { + suite := cipherSuiteTLS13ByID(session.cipherSuite) + transcript := suite.hash.New() + if err := transcriptMsg(hello, transcript); err != nil { + return err + } + earlyTrafficSecret := earlySecret.ClientEarlyTrafficSecret(transcript) + c.quicSetWriteSecret(QUICEncryptionLevelEarly, suite.id, earlyTrafficSecret) + } + + // serverHelloMsg is not included in the transcript + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + + serverHello, ok := msg.(*serverHelloMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(serverHello, msg) + } + + if err := c.pickTLSVersion(serverHello); err != nil { + return err + } + + // If we are negotiating a protocol version that's lower than what we + // support, check for the server downgrade canaries. + // See RFC 8446, Section 4.1.3. + maxVers := c.config.maxSupportedVersion(roleClient) + tls12Downgrade := string(serverHello.random[24:]) == downgradeCanaryTLS12 + tls11Downgrade := string(serverHello.random[24:]) == downgradeCanaryTLS11 + if maxVers == VersionTLS13 && c.vers <= VersionTLS12 && (tls12Downgrade || tls11Downgrade) || + maxVers == VersionTLS12 && c.vers <= VersionTLS11 && tls11Downgrade { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: downgrade attempt detected, possibly due to a MitM attack or a broken middlebox") + } + + if c.vers == VersionTLS13 { + hs := &clientHandshakeStateTLS13{ + c: c, + ctx: ctx, + serverHello: serverHello, + hello: hello, + keyShareKeys: keyShareKeys, + session: session, + earlySecret: earlySecret, + binderKey: binderKey, + echContext: ech, + } + return hs.handshake() + } + + hs := &clientHandshakeState{ + c: c, + ctx: ctx, + serverHello: serverHello, + hello: hello, + session: session, + } + return hs.handshake() +} + +func (c *Conn) loadSession(hello *clientHelloMsg) ( + session *SessionState, earlySecret *tls13.EarlySecret, binderKey []byte, err error) { + // [UTLS SECTION START] + if c.utls.sessionController != nil { + c.utls.sessionController.onEnterLoadSessionCheck() + defer c.utls.sessionController.onLoadSessionReturn() + } + // [UTLS SECTION END] + if c.config.SessionTicketsDisabled || c.config.ClientSessionCache == nil { + return nil, nil, nil, nil + } + + echInner := bytes.Equal(hello.encryptedClientHello, []byte{1}) + + // ticketSupported is a TLS 1.2 extension (as TLS 1.3 replaced tickets with PSK + // identities) and ECH requires and forces TLS 1.3. + hello.ticketSupported = true && !echInner + + if hello.supportedVersions[0] == VersionTLS13 { + // Require DHE on resumption as it guarantees forward secrecy against + // compromise of the session ticket key. See RFC 8446, Section 4.2.9. + hello.pskModes = []uint8{pskModeDHE} + } + + // Session resumption is not allowed if renegotiating because + // renegotiation is primarily used to allow a client to send a client + // certificate, which would be skipped if session resumption occurred. + if c.handshakes != 0 { + return nil, nil, nil, nil + } + + // Try to resume a previously negotiated TLS session, if available. + cacheKey := c.clientSessionCacheKey() + if cacheKey == "" { + return nil, nil, nil, nil + } + cs, ok := c.config.ClientSessionCache.Get(cacheKey) + if !ok || cs == nil { + return nil, nil, nil, nil + } + session = cs.session + + // Check that version used for the previous session is still valid. + versOk := false + for _, v := range hello.supportedVersions { + if v == session.version { + versOk = true + break + } + } + if !versOk { + return nil, nil, nil, nil + } + + // Check that the cached server certificate is not expired, and that it's + // valid for the ServerName. This should be ensured by the cache key, but + // protect the application from a faulty ClientSessionCache implementation. + // [UTLS SECTION START] + if !c.config.InsecureSkipTimeVerify { + if c.config.time().After(session.peerCertificates[0].NotAfter) { + // Expired certificate, delete the entry. + c.config.ClientSessionCache.Put(cacheKey, nil) + return nil, nil, nil, nil + } + } + // [UTLS SECTION END] + if !c.config.InsecureSkipVerify { + if len(session.verifiedChains) == 0 { + // The original connection had InsecureSkipVerify, while this doesn't. + return nil, nil, nil, nil + } + // [UTLS SECTION START] + var dnsName string + if len(c.config.InsecureServerNameToVerify) == 0 { + dnsName = c.config.ServerName + } else if c.config.InsecureServerNameToVerify != "*" { + dnsName = c.config.InsecureServerNameToVerify + } + if len(dnsName) > 0 { + if err := session.peerCertificates[0].VerifyHostname(dnsName); err != nil { + return nil, nil, nil, nil + } + } + // [UTLS SECTION END] + } + + if session.version != VersionTLS13 { + // In TLS 1.2 the cipher suite must match the resumed session. Ensure we + // are still offering it. + if mutualCipherSuite(hello.cipherSuites, session.cipherSuite) == nil { + return nil, nil, nil, nil + } + + hello.sessionTicket = session.ticket + return + } + + // Check that the session ticket is not expired. + if c.config.time().After(time.Unix(int64(session.useBy), 0)) { + c.config.ClientSessionCache.Put(cacheKey, nil) + return nil, nil, nil, nil + } + + // In TLS 1.3 the KDF hash must match the resumed session. Ensure we + // offer at least one cipher suite with that hash. + cipherSuite := cipherSuiteTLS13ByID(session.cipherSuite) + if cipherSuite == nil { + return nil, nil, nil, nil + } + cipherSuiteOk := false + for _, offeredID := range hello.cipherSuites { + offeredSuite := cipherSuiteTLS13ByID(offeredID) + if offeredSuite != nil && offeredSuite.hash == cipherSuite.hash { + cipherSuiteOk = true + break + } + } + if !cipherSuiteOk { + return nil, nil, nil, nil + } + + if c.quic != nil { + if c.quic.enableSessionEvents { + c.quicResumeSession(session) + } + + // For 0-RTT, the cipher suite has to match exactly, and we need to be + // offering the same ALPN. + if session.EarlyData && mutualCipherSuiteTLS13(hello.cipherSuites, session.cipherSuite) != nil { + for _, alpn := range hello.alpnProtocols { + if alpn == session.alpnProtocol { + hello.earlyData = true + break + } + } + } + } + + // Set the pre_shared_key extension. See RFC 8446, Section 4.2.11.1. + ticketAge := c.config.time().Sub(time.Unix(int64(session.createdAt), 0)) + identity := pskIdentity{ + label: session.ticket, + obfuscatedTicketAge: uint32(ticketAge/time.Millisecond) + session.ageAdd, + } + hello.pskIdentities = []pskIdentity{identity} + hello.pskBinders = [][]byte{make([]byte, cipherSuite.hash.Size())} + + // Compute the PSK binders. See RFC 8446, Section 4.2.11.2. + earlySecret = tls13.NewEarlySecret(cipherSuite.hash.New, session.secret) + binderKey = earlySecret.ResumptionBinderKey() + // [UTLS SECTION START] + if c.utls.sessionController != nil && !c.utls.sessionController.shouldLoadSessionWriteBinders() { + return + } + // [UTLS SECTION END] + transcript := cipherSuite.hash.New() + if err := computeAndUpdatePSK(hello, binderKey, transcript, cipherSuite.finishedHash); err != nil { + return nil, nil, nil, err + } + + return +} + +func (c *Conn) pickTLSVersion(serverHello *serverHelloMsg) error { + peerVersion := serverHello.vers + if serverHello.supportedVersion != 0 { + peerVersion = serverHello.supportedVersion + } + + vers, ok := c.config.mutualVersion(roleClient, []uint16{peerVersion}) + if !ok { + c.sendAlert(alertProtocolVersion) + return fmt.Errorf("tls: server selected unsupported protocol version %x", peerVersion) + } + + c.vers = vers + c.haveVers = true + c.in.version = vers + c.out.version = vers + + return nil +} + +// Does the handshake, either a full one or resumes old session. Requires hs.c, +// hs.hello, hs.serverHello, and, optionally, hs.session to be set. +func (hs *clientHandshakeState) handshake() error { + c := hs.c + + isResume, err := hs.processServerHello() + if err != nil { + return err + } + + hs.finishedHash = newFinishedHash(c.vers, hs.suite) + + // No signatures of the handshake are needed in a resumption. + // Otherwise, in a full handshake, if we don't have any certificates + // configured then we will never send a CertificateVerify message and + // thus no signatures are needed in that case either. + if isResume || (len(c.config.Certificates) == 0 && c.config.GetClientCertificate == nil) { + hs.finishedHash.discardHandshakeBuffer() + } + + if err := transcriptMsg(hs.hello, &hs.finishedHash); err != nil { + return err + } + if err := transcriptMsg(hs.serverHello, &hs.finishedHash); err != nil { + return err + } + + c.buffering = true + c.didResume = isResume + if isResume { + if err := hs.establishKeys(); err != nil { + return err + } + if err := hs.readSessionTicket(); err != nil { + return err + } + if err := hs.readFinished(c.serverFinished[:]); err != nil { + return err + } + c.clientFinishedIsFirst = false + // Make sure the connection is still being verified whether or not this + // is a resumption. Resumptions currently don't reverify certificates so + // they don't call verifyServerCertificate. See Issue 31641. + if c.config.VerifyConnection != nil { + if err := c.config.VerifyConnection(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + if err := hs.sendFinished(c.clientFinished[:]); err != nil { + return err + } + if _, err := c.flush(); err != nil { + return err + } + } else { + if err := hs.doFullHandshake(); err != nil { + return err + } + if err := hs.establishKeys(); err != nil { + return err + } + if err := hs.sendFinished(c.clientFinished[:]); err != nil { + return err + } + if _, err := c.flush(); err != nil { + return err + } + c.clientFinishedIsFirst = true + if err := hs.readSessionTicket(); err != nil { + return err + } + if err := hs.readFinished(c.serverFinished[:]); err != nil { + return err + } + } + if err := hs.saveSessionTicket(); err != nil { + return err + } + + c.ekm = ekmFromMasterSecret(c.vers, hs.suite, hs.masterSecret, hs.hello.random, hs.serverHello.random) + c.isHandshakeComplete.Store(true) + + return nil +} + +func (hs *clientHandshakeState) pickCipherSuite() error { + if hs.suite = mutualCipherSuite(hs.hello.cipherSuites, hs.serverHello.cipherSuite); hs.suite == nil { + hs.c.sendAlert(alertHandshakeFailure) + return errors.New("tls: server chose an unconfigured cipher suite") + } + + // [UTLS SECTION START] + // if hs.c.config.CipherSuites == nil && !fips140tls.Required() && rsaKexCiphers[hs.suite.id] { + // tlsrsakex.Value() // ensure godebug is initialized + // tlsrsakex.IncNonDefault() + // } + // if hs.c.config.CipherSuites == nil && !fips140tls.Required() && tdesCiphers[hs.suite.id] { + // tls3des.Value() // ensure godebug is initialized + // tls3des.IncNonDefault() + // } + // [UTLS SECTION END] + + hs.c.cipherSuite = hs.suite.id + return nil +} + +func (hs *clientHandshakeState) doFullHandshake() error { + c := hs.c + + msg, err := c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + certMsg, ok := msg.(*certificateMsg) + if !ok || len(certMsg.certificates) == 0 { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(certMsg, msg) + } + + msg, err = c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + + cs, ok := msg.(*certificateStatusMsg) + if ok { + // RFC4366 on Certificate Status Request: + // The server MAY return a "certificate_status" message. + + if !hs.serverHello.ocspStapling { + // If a server returns a "CertificateStatus" message, then the + // server MUST have included an extension of type "status_request" + // with empty "extension_data" in the extended server hello. + + c.sendAlert(alertUnexpectedMessage) + return errors.New("tls: received unexpected CertificateStatus message") + } + + c.ocspResponse = cs.response + + msg, err = c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + } + + if c.handshakes == 0 { + // If this is the first handshake on a connection, process and + // (optionally) verify the server's certificates. + if err := c.verifyServerCertificate(certMsg.certificates); err != nil { + return err + } + } else { + // This is a renegotiation handshake. We require that the + // server's identity (i.e. leaf certificate) is unchanged and + // thus any previous trust decision is still valid. + // + // See https://mitls.org/pages/attacks/3SHAKE for the + // motivation behind this requirement. + if !bytes.Equal(c.peerCertificates[0].Raw, certMsg.certificates[0]) { + c.sendAlert(alertBadCertificate) + return errors.New("tls: server's identity changed during renegotiation") + } + } + + keyAgreement := hs.suite.ka(c.vers) + + skx, ok := msg.(*serverKeyExchangeMsg) + if ok { + err = keyAgreement.processServerKeyExchange(c.config, hs.hello, hs.serverHello, c.peerCertificates[0], skx) + if err != nil { + c.sendAlert(alertIllegalParameter) + return err + } + if len(skx.key) >= 3 && skx.key[0] == 3 /* named curve */ { + c.curveID = CurveID(byteorder.BEUint16(skx.key[1:])) + } + + msg, err = c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + } + + var chainToSend *Certificate + var certRequested bool + certReq, ok := msg.(*certificateRequestMsg) + if ok { + certRequested = true + + cri := certificateRequestInfoFromMsg(hs.ctx, c.vers, certReq) + if chainToSend, err = c.getClientCertificate(cri); err != nil { + c.sendAlert(alertInternalError) + return err + } + + msg, err = c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + } + + shd, ok := msg.(*serverHelloDoneMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(shd, msg) + } + + // If the server requested a certificate then we have to send a + // Certificate message, even if it's empty because we don't have a + // certificate to send. + if certRequested { + certMsg = new(certificateMsg) + certMsg.certificates = chainToSend.Certificate + if _, err := hs.c.writeHandshakeRecord(certMsg, &hs.finishedHash); err != nil { + return err + } + } + + preMasterSecret, ckx, err := keyAgreement.generateClientKeyExchange(c.config, hs.hello, c.peerCertificates[0]) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + if ckx != nil { + if _, err := hs.c.writeHandshakeRecord(ckx, &hs.finishedHash); err != nil { + return err + } + } + + if hs.serverHello.extendedMasterSecret { + c.extMasterSecret = true + hs.masterSecret = extMasterFromPreMasterSecret(c.vers, hs.suite, preMasterSecret, + hs.finishedHash.Sum()) + } else { + hs.masterSecret = masterFromPreMasterSecret(c.vers, hs.suite, preMasterSecret, + hs.hello.random, hs.serverHello.random) + } + if err := c.config.writeKeyLog(keyLogLabelTLS12, hs.hello.random, hs.masterSecret); err != nil { + c.sendAlert(alertInternalError) + return errors.New("tls: failed to write to key log: " + err.Error()) + } + + if chainToSend != nil && len(chainToSend.Certificate) > 0 { + certVerify := &certificateVerifyMsg{} + + key, ok := chainToSend.PrivateKey.(crypto.Signer) + if !ok { + c.sendAlert(alertInternalError) + return fmt.Errorf("tls: client certificate private key of type %T does not implement crypto.Signer", chainToSend.PrivateKey) + } + + var sigType uint8 + var sigHash crypto.Hash + if c.vers >= VersionTLS12 { + signatureAlgorithm, err := selectSignatureScheme(c.vers, chainToSend, certReq.supportedSignatureAlgorithms) + if err != nil { + c.sendAlert(alertIllegalParameter) + return err + } + sigType, sigHash, err = typeAndHashFromSignatureScheme(signatureAlgorithm) + if err != nil { + return c.sendAlert(alertInternalError) + } + certVerify.hasSignatureAlgorithm = true + certVerify.signatureAlgorithm = signatureAlgorithm + } else { + sigType, sigHash, err = legacyTypeAndHashFromPublicKey(key.Public()) + if err != nil { + c.sendAlert(alertIllegalParameter) + return err + } + } + + signed := hs.finishedHash.hashForClientCertificate(sigType, sigHash) + signOpts := crypto.SignerOpts(sigHash) + if sigType == signatureRSAPSS { + signOpts = &rsa.PSSOptions{SaltLength: rsa.PSSSaltLengthEqualsHash, Hash: sigHash} + } + certVerify.signature, err = key.Sign(c.config.rand(), signed, signOpts) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + + if _, err := hs.c.writeHandshakeRecord(certVerify, &hs.finishedHash); err != nil { + return err + } + } + + hs.finishedHash.discardHandshakeBuffer() + + return nil +} + +func (hs *clientHandshakeState) establishKeys() error { + c := hs.c + + clientMAC, serverMAC, clientKey, serverKey, clientIV, serverIV := + keysFromMasterSecret(c.vers, hs.suite, hs.masterSecret, hs.hello.random, hs.serverHello.random, hs.suite.macLen, hs.suite.keyLen, hs.suite.ivLen) + var clientCipher, serverCipher any + var clientHash, serverHash hash.Hash + if hs.suite.cipher != nil { + clientCipher = hs.suite.cipher(clientKey, clientIV, false /* not for reading */) + clientHash = hs.suite.mac(clientMAC) + serverCipher = hs.suite.cipher(serverKey, serverIV, true /* for reading */) + serverHash = hs.suite.mac(serverMAC) + } else { + clientCipher = hs.suite.aead(clientKey, clientIV) + serverCipher = hs.suite.aead(serverKey, serverIV) + } + + c.in.prepareCipherSpec(c.vers, serverCipher, serverHash) + c.out.prepareCipherSpec(c.vers, clientCipher, clientHash) + return nil +} + +func (hs *clientHandshakeState) serverResumedSession() bool { + // If the server responded with the same sessionId then it means the + // sessionTicket is being used to resume a TLS session. + return hs.session != nil && hs.hello.sessionId != nil && + bytes.Equal(hs.serverHello.sessionId, hs.hello.sessionId) +} + +func (hs *clientHandshakeState) processServerHello() (bool, error) { + c := hs.c + + if err := hs.pickCipherSuite(); err != nil { + return false, err + } + + if hs.serverHello.compressionMethod != compressionNone { + c.sendAlert(alertUnexpectedMessage) + return false, errors.New("tls: server selected unsupported compression format") + } + + if c.handshakes == 0 && hs.serverHello.secureRenegotiationSupported { + c.secureRenegotiation = true + if len(hs.serverHello.secureRenegotiation) != 0 { + c.sendAlert(alertHandshakeFailure) + return false, errors.New("tls: initial handshake had non-empty renegotiation extension") + } + } + + if c.handshakes > 0 && c.secureRenegotiation { + var expectedSecureRenegotiation [24]byte + copy(expectedSecureRenegotiation[:], c.clientFinished[:]) + copy(expectedSecureRenegotiation[12:], c.serverFinished[:]) + if !bytes.Equal(hs.serverHello.secureRenegotiation, expectedSecureRenegotiation[:]) { + c.sendAlert(alertHandshakeFailure) + return false, errors.New("tls: incorrect renegotiation extension contents") + } + } + + if err := checkALPN(hs.hello.alpnProtocols, hs.serverHello.alpnProtocol, false); err != nil { + c.sendAlert(alertUnsupportedExtension) + return false, err + } + c.clientProtocol = hs.serverHello.alpnProtocol + + c.scts = hs.serverHello.scts + + if !hs.serverResumedSession() { + return false, nil + } + + if hs.session.version != c.vers { + c.sendAlert(alertHandshakeFailure) + return false, errors.New("tls: server resumed a session with a different version") + } + + if hs.session.cipherSuite != hs.suite.id { + c.sendAlert(alertHandshakeFailure) + return false, errors.New("tls: server resumed a session with a different cipher suite") + } + + // RFC 7627, Section 5.3 + if hs.session.extMasterSecret != hs.serverHello.extendedMasterSecret { + c.sendAlert(alertHandshakeFailure) + return false, errors.New("tls: server resumed a session with a different EMS extension") + } + + // Restore master secret and certificates from previous state + hs.masterSecret = hs.session.secret + c.extMasterSecret = hs.session.extMasterSecret + c.peerCertificates = hs.session.peerCertificates + c.activeCertHandles = hs.c.activeCertHandles + c.verifiedChains = hs.session.verifiedChains + c.ocspResponse = hs.session.ocspResponse + // Let the ServerHello SCTs override the session SCTs from the original + // connection, if any are provided + if len(c.scts) == 0 && len(hs.session.scts) != 0 { + c.scts = hs.session.scts + } + + return true, nil +} + +// checkALPN ensure that the server's choice of ALPN protocol is compatible with +// the protocols that we advertised in the ClientHello. +func checkALPN(clientProtos []string, serverProto string, quic bool) error { + if serverProto == "" { + if quic && len(clientProtos) > 0 { + // RFC 9001, Section 8.1 + return errors.New("tls: server did not select an ALPN protocol") + } + return nil + } + if len(clientProtos) == 0 { + return errors.New("tls: server advertised unrequested ALPN extension") + } + for _, proto := range clientProtos { + if proto == serverProto { + return nil + } + } + return errors.New("tls: server selected unadvertised ALPN protocol") +} + +func (hs *clientHandshakeState) readFinished(out []byte) error { + c := hs.c + + if err := c.readChangeCipherSpec(); err != nil { + return err + } + + // finishedMsg is included in the transcript, but not until after we + // check the client version, since the state before this message was + // sent is used during verification. + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + serverFinished, ok := msg.(*finishedMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(serverFinished, msg) + } + + verify := hs.finishedHash.serverSum(hs.masterSecret) + if len(verify) != len(serverFinished.verifyData) || + subtle.ConstantTimeCompare(verify, serverFinished.verifyData) != 1 { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: server's Finished message was incorrect") + } + + if err := transcriptMsg(serverFinished, &hs.finishedHash); err != nil { + return err + } + + copy(out, verify) + return nil +} + +func (hs *clientHandshakeState) readSessionTicket() error { + if !hs.serverHello.ticketSupported { + return nil + } + c := hs.c + + if !hs.hello.ticketSupported { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server sent unrequested session ticket") + } + + msg, err := c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + sessionTicketMsg, ok := msg.(*newSessionTicketMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(sessionTicketMsg, msg) + } + + hs.ticket = sessionTicketMsg.ticket + return nil +} + +func (hs *clientHandshakeState) saveSessionTicket() error { + if hs.ticket == nil { + return nil + } + c := hs.c + + cacheKey := c.clientSessionCacheKey() + if cacheKey == "" { + return nil + } + + session := c.sessionState() + session.secret = hs.masterSecret + session.ticket = hs.ticket + + cs := &ClientSessionState{session: session} + // [UTLS BEGIN] + if c.config.ClientSessionCache != nil { // skip saving session if cache is nil + c.config.ClientSessionCache.Put(cacheKey, cs) + } + // [UTLS END] + return nil +} + +func (hs *clientHandshakeState) sendFinished(out []byte) error { + c := hs.c + + if err := c.writeChangeCipherRecord(); err != nil { + return err + } + + finished := new(finishedMsg) + finished.verifyData = hs.finishedHash.clientSum(hs.masterSecret) + if _, err := hs.c.writeHandshakeRecord(finished, &hs.finishedHash); err != nil { + return err + } + copy(out, finished.verifyData) + return nil +} + +// defaultMaxRSAKeySize is the maximum RSA key size in bits that we are willing +// to verify the signatures of during a TLS handshake. +const defaultMaxRSAKeySize = 8192 + +// var tlsmaxrsasize = godebug.New("tlsmaxrsasize") // [uTLS] unused + +func checkKeySize(n int) (max int, ok bool) { + // [uTLS SECTION START] + // Disable the unsupported godebug package + // if v := tlsmaxrsasize.Value(); v != "" { + // if max, err := strconv.Atoi(v); err == nil { + // if (n <= max) != (n <= defaultMaxRSAKeySize) { + // tlsmaxrsasize.IncNonDefault() + // } + // return max, n <= max + // } + // } + // [uTLS SECTION END] + return defaultMaxRSAKeySize, n <= defaultMaxRSAKeySize +} + +// verifyServerCertificate parses and verifies the provided chain, setting +// c.verifiedChains and c.peerCertificates or sending the appropriate alert. +func (c *Conn) verifyServerCertificate(certificates [][]byte) error { + activeHandles := make([]*activeCert, len(certificates)) + certs := make([]*x509.Certificate, len(certificates)) + for i, asn1Data := range certificates { + cert, err := globalCertCache.newCert(asn1Data) + if err != nil { + c.sendAlert(alertBadCertificate) + return errors.New("tls: failed to parse certificate from server: " + err.Error()) + } + if cert.cert.PublicKeyAlgorithm == x509.RSA { + n := cert.cert.PublicKey.(*rsa.PublicKey).N.BitLen() + if max, ok := checkKeySize(n); !ok { + c.sendAlert(alertBadCertificate) + return fmt.Errorf("tls: server sent certificate containing RSA key larger than %d bits", max) + } + } + activeHandles[i] = cert + certs[i] = cert.cert + } + + echRejected := c.config.EncryptedClientHelloConfigList != nil && !c.echAccepted + if echRejected { + if c.config.EncryptedClientHelloRejectionVerify != nil { + if err := c.config.EncryptedClientHelloRejectionVerify(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } else { + opts := x509.VerifyOptions{ + Roots: c.config.RootCAs, + CurrentTime: c.config.time(), + // DNSName: c.serverName, // [uTLS] + Intermediates: x509.NewCertPool(), + } + + // [UTLS SECTION START] + if c.config.InsecureSkipTimeVerify { + opts.CurrentTime = certs[0].NotAfter + } + + if len(c.config.InsecureServerNameToVerify) == 0 { + opts.DNSName = c.config.ServerName + } else if c.config.InsecureServerNameToVerify != "*" { + opts.DNSName = c.config.InsecureServerNameToVerify + } + // [UTLS SECTION END] + + for _, cert := range certs[1:] { + opts.Intermediates.AddCert(cert) + } + chains, err := certs[0].Verify(opts) + if err != nil { + c.sendAlert(alertBadCertificate) + return &CertificateVerificationError{UnverifiedCertificates: certs, Err: err} + } + + c.verifiedChains, err = fipsAllowedChains(chains) + if err != nil { + c.sendAlert(alertBadCertificate) + return &CertificateVerificationError{UnverifiedCertificates: certs, Err: err} + } + } + } else if !c.config.InsecureSkipVerify { + // [UTLS SECTION START] + opts := x509.VerifyOptions{ + Roots: c.config.RootCAs, + CurrentTime: c.config.time(), + // DNSName: c.serverName, // [uTLS] + Intermediates: x509.NewCertPool(), + } + + if c.config.InsecureSkipTimeVerify { + opts.CurrentTime = certs[0].NotAfter + } + + if len(c.config.InsecureServerNameToVerify) == 0 { + opts.DNSName = c.config.ServerName + } else if c.config.InsecureServerNameToVerify != "*" { + opts.DNSName = c.config.InsecureServerNameToVerify + } + // [UTLS SECTION END] + + for _, cert := range certs[1:] { + opts.Intermediates.AddCert(cert) + } + chains, err := certs[0].Verify(opts) + if err != nil { + c.sendAlert(alertBadCertificate) + return &CertificateVerificationError{UnverifiedCertificates: certs, Err: err} + } + + c.verifiedChains, err = fipsAllowedChains(chains) + if err != nil { + c.sendAlert(alertBadCertificate) + return &CertificateVerificationError{UnverifiedCertificates: certs, Err: err} + } + } + + switch certs[0].PublicKey.(type) { + case *rsa.PublicKey, *ecdsa.PublicKey, ed25519.PublicKey, circlSign.PublicKey: // [UTLS] ported from cloudflare/go + break + default: + c.sendAlert(alertUnsupportedCertificate) + return fmt.Errorf("tls: server's certificate contains an unsupported type of public key: %T", certs[0].PublicKey) + } + + c.activeCertHandles = activeHandles + c.peerCertificates = certs + + if c.config.VerifyPeerCertificate != nil && !echRejected { + if err := c.config.VerifyPeerCertificate(certificates, c.verifiedChains); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + + if c.config.VerifyConnection != nil && !echRejected { + if err := c.config.VerifyConnection(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + + return nil +} + +// certificateRequestInfoFromMsg generates a CertificateRequestInfo from a TLS +// <= 1.2 CertificateRequest, making an effort to fill in missing information. +func certificateRequestInfoFromMsg(ctx context.Context, vers uint16, certReq *certificateRequestMsg) *CertificateRequestInfo { + cri := &CertificateRequestInfo{ + AcceptableCAs: certReq.certificateAuthorities, + Version: vers, + ctx: ctx, + } + + var rsaAvail, ecAvail bool + for _, certType := range certReq.certificateTypes { + switch certType { + case certTypeRSASign: + rsaAvail = true + case certTypeECDSASign: + ecAvail = true + } + } + + if !certReq.hasSignatureAlgorithm { + // Prior to TLS 1.2, signature schemes did not exist. In this case we + // make up a list based on the acceptable certificate types, to help + // GetClientCertificate and SupportsCertificate select the right certificate. + // The hash part of the SignatureScheme is a lie here, because + // TLS 1.0 and 1.1 always use MD5+SHA1 for RSA and SHA1 for ECDSA. + switch { + case rsaAvail && ecAvail: + cri.SignatureSchemes = []SignatureScheme{ + ECDSAWithP256AndSHA256, ECDSAWithP384AndSHA384, ECDSAWithP521AndSHA512, + PKCS1WithSHA256, PKCS1WithSHA384, PKCS1WithSHA512, PKCS1WithSHA1, + } + case rsaAvail: + cri.SignatureSchemes = []SignatureScheme{ + PKCS1WithSHA256, PKCS1WithSHA384, PKCS1WithSHA512, PKCS1WithSHA1, + } + case ecAvail: + cri.SignatureSchemes = []SignatureScheme{ + ECDSAWithP256AndSHA256, ECDSAWithP384AndSHA384, ECDSAWithP521AndSHA512, + } + } + return cri + } + + // Filter the signature schemes based on the certificate types. + // See RFC 5246, Section 7.4.4 (where it calls this "somewhat complicated"). + cri.SignatureSchemes = make([]SignatureScheme, 0, len(certReq.supportedSignatureAlgorithms)) + for _, sigScheme := range certReq.supportedSignatureAlgorithms { + sigType, _, err := typeAndHashFromSignatureScheme(sigScheme) + if err != nil { + continue + } + switch sigType { + case signatureECDSA, signatureEd25519: + if ecAvail { + cri.SignatureSchemes = append(cri.SignatureSchemes, sigScheme) + } + case signatureRSAPSS, signaturePKCS1v15: + if rsaAvail { + cri.SignatureSchemes = append(cri.SignatureSchemes, sigScheme) + } + } + } + + return cri +} + +func (c *Conn) getClientCertificate(cri *CertificateRequestInfo) (*Certificate, error) { + if c.config.GetClientCertificate != nil { + return c.config.GetClientCertificate(cri) + } + + for _, chain := range c.config.Certificates { + if err := cri.SupportsCertificate(&chain); err != nil { + continue + } + return &chain, nil + } + + // No acceptable certificate found. Don't send a certificate. + return new(Certificate), nil +} + +// clientSessionCacheKey returns a key used to cache sessionTickets that could +// be used to resume previously negotiated TLS sessions with a server. +func (c *Conn) clientSessionCacheKey() string { + if len(c.config.ServerName) > 0 { + return c.config.ServerName + } + if c.conn != nil { + return c.conn.RemoteAddr().String() + } + return "" +} + +// hostnameInSNI converts name into an appropriate hostname for SNI. +// Literal IP addresses and absolute FQDNs are not permitted as SNI values. +// See RFC 6066, Section 3. +func hostnameInSNI(name string) string { + host := name + if len(host) > 0 && host[0] == '[' && host[len(host)-1] == ']' { + host = host[1 : len(host)-1] + } + if i := strings.LastIndex(host, "%"); i > 0 { + host = host[:i] + } + if net.ParseIP(host) != nil { + return "" + } + for len(name) > 0 && name[len(name)-1] == '.' { + name = name[:len(name)-1] + } + return name +} + +func computeAndUpdatePSK(m *clientHelloMsg, binderKey []byte, transcript hash.Hash, finishedHash func([]byte, hash.Hash) []byte) error { + helloBytes, err := m.marshalWithoutBinders() + if err != nil { + return err + } + transcript.Write(helloBytes) + pskBinders := [][]byte{finishedHash(binderKey, transcript)} + return m.updateBinders(pskBinders) +} diff --git a/backend/vendor/github.com/refraction-networking/utls/handshake_client_tls13.go b/backend/vendor/github.com/refraction-networking/utls/handshake_client_tls13.go new file mode 100644 index 0000000..07a1e21 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/handshake_client_tls13.go @@ -0,0 +1,1053 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bytes" + "context" + "crypto" + "crypto/hmac" + "crypto/mlkem" + "crypto/rsa" + "crypto/subtle" + "errors" + "fmt" + "hash" + "slices" + "time" + + "github.com/refraction-networking/utls/internal/hkdf" + "github.com/refraction-networking/utls/internal/tls13" +) + +type clientHandshakeStateTLS13 struct { + c *Conn + ctx context.Context + serverHello *serverHelloMsg + hello *clientHelloMsg + keyShareKeys *keySharePrivateKeys + + session *SessionState + earlySecret *tls13.EarlySecret + binderKey []byte + + certReq *certificateRequestMsgTLS13 + usingPSK bool + sentDummyCCS bool + suite *cipherSuiteTLS13 + transcript hash.Hash + masterSecret *tls13.MasterSecret + trafficSecret []byte // client_application_traffic_secret_0 + + echContext *echClientContext + + uconn *UConn // [uTLS] +} + +// handshake requires hs.c, hs.hello, hs.serverHello, hs.keyShareKeys, and, +// optionally, hs.session, hs.earlySecret and hs.binderKey to be set. +func (hs *clientHandshakeStateTLS13) handshake() error { + c := hs.c + + // The server must not select TLS 1.3 in a renegotiation. See RFC 8446, + // sections 4.1.2 and 4.1.3. + if c.handshakes > 0 { + c.sendAlert(alertProtocolVersion) + return errors.New("tls: server selected TLS 1.3 in a renegotiation") + } + + // Consistency check on the presence of a keyShare and its parameters. + if hs.keyShareKeys == nil || hs.keyShareKeys.ecdhe == nil || len(hs.hello.keyShares) == 0 { + return c.sendAlert(alertInternalError) + } + + if err := hs.checkServerHelloOrHRR(); err != nil { + return err + } + + hs.transcript = hs.suite.hash.New() + + if err := transcriptMsg(hs.hello, hs.transcript); err != nil { + return err + } + + if hs.echContext != nil { + hs.echContext.innerTranscript = hs.suite.hash.New() + // [uTLS SECTION BEGIN] + if hs.uconn != nil && hs.uconn.clientHelloBuildStatus == BuildByUtls { + if err := hs.uconn.echTranscriptMsg(hs.hello, hs.echContext); err != nil { + return err + } + } else { + if err := transcriptMsg(hs.echContext.innerHello, hs.echContext.innerTranscript); err != nil { + return err + } + } + // [uTLS SECTION END] + } + + if bytes.Equal(hs.serverHello.random, helloRetryRequestRandom) { + if err := hs.sendDummyChangeCipherSpec(); err != nil { + return err + } + if err := hs.processHelloRetryRequest(); err != nil { + return err + } + } + + if hs.echContext != nil { + confTranscript := cloneHash(hs.echContext.innerTranscript, hs.suite.hash) + confTranscript.Write(hs.serverHello.original[:30]) + confTranscript.Write(make([]byte, 8)) + confTranscript.Write(hs.serverHello.original[38:]) + acceptConfirmation := tls13.ExpandLabel(hs.suite.hash.New, + hkdf.Extract(hs.suite.hash.New, hs.echContext.innerHello.random, nil), + "ech accept confirmation", + confTranscript.Sum(nil), + 8, + ) + if subtle.ConstantTimeCompare(acceptConfirmation, hs.serverHello.random[len(hs.serverHello.random)-8:]) == 1 { + hs.hello = hs.echContext.innerHello + c.serverName = c.config.ServerName + hs.transcript = hs.echContext.innerTranscript + c.echAccepted = true + + if hs.serverHello.encryptedClientHello != nil { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: unexpected encrypted client hello extension in server hello despite ECH being accepted") + } + + if hs.hello.serverName == "" && hs.serverHello.serverNameAck { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: unexpected server_name extension in server hello") + } + } else { + hs.echContext.echRejected = true + } + } + + if err := transcriptMsg(hs.serverHello, hs.transcript); err != nil { + return err + } + + c.buffering = true + if err := hs.processServerHello(); err != nil { + return err + } + if err := hs.sendDummyChangeCipherSpec(); err != nil { + return err + } + if err := hs.establishHandshakeKeys(); err != nil { + return err + } + if err := hs.readServerParameters(); err != nil { + return err + } + if err := hs.readServerCertificate(); err != nil { + return err + } + if err := hs.readServerFinished(); err != nil { + return err + } + // [UTLS SECTION START] + if err := hs.serverFinishedReceived(); err != nil { + return err + } + // [UTLS SECTION END] + if err := hs.sendClientCertificate(); err != nil { + return err + } + if err := hs.sendClientFinished(); err != nil { + return err + } + if _, err := c.flush(); err != nil { + return err + } + + if hs.echContext != nil && hs.echContext.echRejected { + c.sendAlert(alertECHRequired) + return &ECHRejectionError{hs.echContext.retryConfigs} + } + + c.isHandshakeComplete.Store(true) + + return nil +} + +// checkServerHelloOrHRR does validity checks that apply to both ServerHello and +// HelloRetryRequest messages. It sets hs.suite. +func (hs *clientHandshakeStateTLS13) checkServerHelloOrHRR() error { + c := hs.c + + if hs.serverHello.supportedVersion == 0 { + c.sendAlert(alertMissingExtension) + return errors.New("tls: server selected TLS 1.3 using the legacy version field") + } + + if hs.serverHello.supportedVersion != VersionTLS13 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server selected an invalid version after a HelloRetryRequest") + } + + if hs.serverHello.vers != VersionTLS12 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server sent an incorrect legacy version") + } + + if hs.serverHello.ocspStapling || + hs.serverHello.ticketSupported || + hs.serverHello.extendedMasterSecret || + hs.serverHello.secureRenegotiationSupported || + len(hs.serverHello.secureRenegotiation) != 0 || + len(hs.serverHello.alpnProtocol) != 0 || + len(hs.serverHello.scts) != 0 { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: server sent a ServerHello extension forbidden in TLS 1.3") + } + + if !bytes.Equal(hs.hello.sessionId, hs.serverHello.sessionId) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server did not echo the legacy session ID") + } + + if hs.serverHello.compressionMethod != compressionNone { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server selected unsupported compression format") + } + + selectedSuite := mutualCipherSuiteTLS13(hs.hello.cipherSuites, hs.serverHello.cipherSuite) + if hs.suite != nil && selectedSuite != hs.suite { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server changed cipher suite after a HelloRetryRequest") + } + if selectedSuite == nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server chose an unconfigured cipher suite") + } + hs.suite = selectedSuite + c.cipherSuite = hs.suite.id + + return nil +} + +// sendDummyChangeCipherSpec sends a ChangeCipherSpec record for compatibility +// with middleboxes that didn't implement TLS correctly. See RFC 8446, Appendix D.4. +func (hs *clientHandshakeStateTLS13) sendDummyChangeCipherSpec() error { + if hs.c.quic != nil { + return nil + } + if hs.sentDummyCCS { + return nil + } + hs.sentDummyCCS = true + + return hs.c.writeChangeCipherRecord() +} + +// processHelloRetryRequest handles the HRR in hs.serverHello, modifies and +// resends hs.hello, and reads the new ServerHello into hs.serverHello. +func (hs *clientHandshakeStateTLS13) processHelloRetryRequest() error { + c := hs.c + + // The first ClientHello gets double-hashed into the transcript upon a + // HelloRetryRequest. (The idea is that the server might offload transcript + // storage to the client in the cookie.) See RFC 8446, Section 4.4.1. + chHash := hs.transcript.Sum(nil) + hs.transcript.Reset() + hs.transcript.Write([]byte{typeMessageHash, 0, 0, uint8(len(chHash))}) + hs.transcript.Write(chHash) + if err := transcriptMsg(hs.serverHello, hs.transcript); err != nil { + return err + } + + var isInnerHello bool + hello := hs.hello + if hs.echContext != nil { + chHash = hs.echContext.innerTranscript.Sum(nil) + hs.echContext.innerTranscript.Reset() + hs.echContext.innerTranscript.Write([]byte{typeMessageHash, 0, 0, uint8(len(chHash))}) + hs.echContext.innerTranscript.Write(chHash) + + if hs.serverHello.encryptedClientHello != nil { + if len(hs.serverHello.encryptedClientHello) != 8 { + hs.c.sendAlert(alertDecodeError) + return errors.New("tls: malformed encrypted client hello extension") + } + + confTranscript := cloneHash(hs.echContext.innerTranscript, hs.suite.hash) + hrrHello := make([]byte, len(hs.serverHello.original)) + copy(hrrHello, hs.serverHello.original) + hrrHello = bytes.Replace(hrrHello, hs.serverHello.encryptedClientHello, make([]byte, 8), 1) + confTranscript.Write(hrrHello) + acceptConfirmation := tls13.ExpandLabel(hs.suite.hash.New, + hkdf.Extract(hs.suite.hash.New, hs.echContext.innerHello.random, nil), + "hrr ech accept confirmation", + confTranscript.Sum(nil), + 8, + ) + if subtle.ConstantTimeCompare(acceptConfirmation, hs.serverHello.encryptedClientHello) == 1 { + hello = hs.echContext.innerHello + c.serverName = c.config.ServerName + isInnerHello = true + c.echAccepted = true + } + } + + if err := transcriptMsg(hs.serverHello, hs.echContext.innerTranscript); err != nil { + return err + } + } else if hs.serverHello.encryptedClientHello != nil { + // Unsolicited ECH extension should be rejected + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: unexpected encrypted client hello extension in serverHello") + } + + // The only HelloRetryRequest extensions we support are key_share and + // cookie, and clients must abort the handshake if the HRR would not result + // in any change in the ClientHello. + if hs.serverHello.selectedGroup == 0 && hs.serverHello.cookie == nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server sent an unnecessary HelloRetryRequest message") + } + + if hs.serverHello.cookie != nil { + hello.cookie = hs.serverHello.cookie + } + + if hs.serverHello.serverShare.group != 0 { + c.sendAlert(alertDecodeError) + return errors.New("tls: received malformed key_share extension") + } + + // If the server sent a key_share extension selecting a group, ensure it's + // a group we advertised but did not send a key share for, and send a key + // share for it this time. + if curveID := hs.serverHello.selectedGroup; curveID != 0 { + if !slices.Contains(hello.supportedCurves, curveID) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server selected unsupported group") + } + if slices.ContainsFunc(hs.hello.keyShares, func(ks keyShare) bool { + return ks.group == curveID + }) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server sent an unnecessary HelloRetryRequest key_share") + } + // Note: we don't support selecting X25519MLKEM768 in a HRR, because it + // is currently first in preference order, so if it's enabled we'll + // always send a key share for it. + // + // This will have to change once we support multiple hybrid KEMs. + if _, ok := curveForCurveID(curveID); !ok { + c.sendAlert(alertInternalError) + return errors.New("tls: CurvePreferences includes unsupported curve") + } + key, err := generateECDHEKey(c.config.rand(), curveID) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + hs.keyShareKeys = &keySharePrivateKeys{curveID: curveID, ecdhe: key} + hello.keyShares = []keyShare{{group: curveID, data: key.PublicKey().Bytes()}} + } + + if len(hello.pskIdentities) > 0 { + pskSuite := cipherSuiteTLS13ByID(hs.session.cipherSuite) + if pskSuite == nil { + return c.sendAlert(alertInternalError) + } + if pskSuite.hash == hs.suite.hash { + // Update binders and obfuscated_ticket_age. + ticketAge := c.config.time().Sub(time.Unix(int64(hs.session.createdAt), 0)) + hello.pskIdentities[0].obfuscatedTicketAge = uint32(ticketAge/time.Millisecond) + hs.session.ageAdd + + transcript := hs.suite.hash.New() + transcript.Write([]byte{typeMessageHash, 0, 0, uint8(len(chHash))}) + transcript.Write(chHash) + if err := transcriptMsg(hs.serverHello, transcript); err != nil { + return err + } + + if err := computeAndUpdatePSK(hello, hs.binderKey, transcript, hs.suite.finishedHash); err != nil { + return err + } + } else { + // Server selected a cipher suite incompatible with the PSK. + hello.pskIdentities = nil + hello.pskBinders = nil + } + } + + // [uTLS SECTION BEGINS] + // crypto/tls code above this point had changed crypto/tls structures in accordance with HRR, and is about + // to call default marshaller. + // Instead, we fill uTLS-specific structs and call uTLS marshaller. + // Only extensionCookie, extensionPreSharedKey, extensionKeyShare, extensionEarlyData, extensionSupportedVersions, + // and utlsExtensionPadding are supposed to change + if hs.uconn != nil { + if hs.uconn.ClientHelloID != HelloGolang { + if len(hs.hello.pskIdentities) > 0 { + // TODO: wait for someone who cares about PSK to implement + return errors.New("uTLS does not support reprocessing of PSK key triggered by HelloRetryRequest") + } + + keyShareExtFound := false + for _, ext := range hs.uconn.Extensions { + // new ks seems to be generated either way + if ks, ok := ext.(*KeyShareExtension); ok { + ks.KeyShares = keyShares(hs.hello.keyShares).ToPublic() + keyShareExtFound = true + } + } + if !keyShareExtFound { + return errors.New("uTLS: received HelloRetryRequest, but keyshare not found among client's " + + "uconn.Extensions") + } + + if len(hs.serverHello.cookie) > 0 { + // serverHello specified a cookie, let's echo it + cookieFound := false + for _, ext := range hs.uconn.Extensions { + if ks, ok := ext.(*CookieExtension); ok { + ks.Cookie = hs.serverHello.cookie + cookieFound = true + } + } + + if !cookieFound { + // pick a random index where to add cookieExtension + // -2 instead of -1 is a lazy way to ensure that PSK is still a last extension + p, err := newPRNG() + if err != nil { + return err + } + cookieIndex := p.Intn(len(hs.uconn.Extensions) - 2) + if cookieIndex >= len(hs.uconn.Extensions) { + // this check is for empty hs.uconn.Extensions + return fmt.Errorf("cookieIndex >= len(hs.uconn.Extensions): %v >= %v", + cookieIndex, len(hs.uconn.Extensions)) + } + hs.uconn.Extensions = append(hs.uconn.Extensions[:cookieIndex], + append([]TLSExtension{&CookieExtension{Cookie: hs.serverHello.cookie}}, + hs.uconn.Extensions[cookieIndex:]...)...) + } + } + if err := hs.uconn.MarshalClientHelloNoECH(); err != nil { + return err + } + hs.hello.original = hs.uconn.HandshakeState.Hello.Raw + } + } + // [uTLS SECTION ENDS] + if hello.earlyData { + hello.earlyData = false + c.quicRejectedEarlyData() + } + + if isInnerHello { + // Any extensions which have changed in hello, but are mirrored in the + // outer hello and compressed, need to be copied to the outer hello, so + // they can be properly decompressed by the server. For now, the only + // extension which may have changed is keyShares. + hs.hello.keyShares = hello.keyShares + hs.echContext.innerHello = hello + if hs.uconn != nil && hs.uconn.clientHelloBuildStatus == BuildByUtls { + if err := hs.uconn.computeAndUpdateOuterECHExtension(hs.echContext.innerHello, hs.echContext, false); err != nil { + return err + } + + hs.hello.original = hs.uconn.HandshakeState.Hello.Raw + + if err := hs.uconn.echTranscriptMsg(hs.hello, hs.echContext); err != nil { + return err + } + + } else { + if err := transcriptMsg(hs.echContext.innerHello, hs.echContext.innerTranscript); err != nil { + return err + } + + if err := computeAndUpdateOuterECHExtension(hs.hello, hs.echContext.innerHello, hs.echContext, false); err != nil { + return err + } + } + } else { + hs.hello = hello + } + + if _, err := hs.c.writeHandshakeRecord(hs.hello, hs.transcript); err != nil { + return err + } + + // serverHelloMsg is not included in the transcript + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + + serverHello, ok := msg.(*serverHelloMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(serverHello, msg) + } + hs.serverHello = serverHello + + if err := hs.checkServerHelloOrHRR(); err != nil { + return err + } + + c.didHRR = true + return nil +} + +func (hs *clientHandshakeStateTLS13) processServerHello() error { + c := hs.c + + if bytes.Equal(hs.serverHello.random, helloRetryRequestRandom) { + c.sendAlert(alertUnexpectedMessage) + return errors.New("tls: server sent two HelloRetryRequest messages") + } + + if len(hs.serverHello.cookie) != 0 { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: server sent a cookie in a normal ServerHello") + } + + if hs.serverHello.selectedGroup != 0 { + c.sendAlert(alertDecodeError) + return errors.New("tls: malformed key_share extension") + } + + if hs.serverHello.serverShare.group == 0 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server did not send a key share") + } + if !slices.ContainsFunc(hs.hello.keyShares, func(ks keyShare) bool { + return ks.group == hs.serverHello.serverShare.group + }) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server selected unsupported group") + } + + if !hs.serverHello.selectedIdentityPresent { + return nil + } + + if int(hs.serverHello.selectedIdentity) >= len(hs.hello.pskIdentities) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server selected an invalid PSK") + } + + if len(hs.hello.pskIdentities) != 1 || hs.session == nil { + return c.sendAlert(alertInternalError) + } + pskSuite := cipherSuiteTLS13ByID(hs.session.cipherSuite) + if pskSuite == nil { + return c.sendAlert(alertInternalError) + } + if pskSuite.hash != hs.suite.hash { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: server selected an invalid PSK and cipher suite pair") + } + + hs.usingPSK = true + c.didResume = true + c.peerCertificates = hs.session.peerCertificates + c.activeCertHandles = hs.session.activeCertHandles + c.verifiedChains = hs.session.verifiedChains + c.ocspResponse = hs.session.ocspResponse + c.scts = hs.session.scts + return nil +} + +func (hs *clientHandshakeStateTLS13) establishHandshakeKeys() error { + c := hs.c + + ecdhePeerData := hs.serverHello.serverShare.data + if hs.serverHello.serverShare.group == X25519MLKEM768 { + if len(ecdhePeerData) != mlkem.CiphertextSize768+x25519PublicKeySize { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid server X25519MLKEM768 key share") + } + ecdhePeerData = hs.serverHello.serverShare.data[mlkem.CiphertextSize768:] + } + // [uTLS] SECTION BEGIN + if hs.serverHello.serverShare.group == X25519Kyber768Draft00 { + if len(ecdhePeerData) != x25519PublicKeySize+mlkem.CiphertextSize768 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid server X25519Kyber768Draft00 key share") + } + ecdhePeerData = hs.serverHello.serverShare.data[:x25519PublicKeySize] + } + // [uTLS] SECTION END + peerKey, err := hs.keyShareKeys.ecdhe.Curve().NewPublicKey(ecdhePeerData) + if err != nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid server key share") + } + sharedKey, err := hs.keyShareKeys.ecdhe.ECDH(peerKey) + if err != nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid server key share") + } + if hs.serverHello.serverShare.group == X25519MLKEM768 { + if hs.keyShareKeys.mlkem == nil { + return c.sendAlert(alertInternalError) + } + ciphertext := hs.serverHello.serverShare.data[:mlkem.CiphertextSize768] + mlkemShared, err := hs.keyShareKeys.mlkem.Decapsulate(ciphertext) + if err != nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid X25519MLKEM768 server key share") + } + sharedKey = append(mlkemShared, sharedKey...) + } + // [uTLS] SECTION BEGIN + if hs.serverHello.serverShare.group == X25519Kyber768Draft00 { + if hs.keyShareKeys.mlkem == nil { + return c.sendAlert(alertInternalError) + } + ciphertext := hs.serverHello.serverShare.data[x25519PublicKeySize:] + kyberShared, err := kyberDecapsulate(hs.keyShareKeys.mlkem, ciphertext) + if err != nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid X25519Kyber768Draft00 server key share") + } + sharedKey = append(sharedKey, kyberShared...) + } + // [uTLS] SECTION END + c.curveID = hs.serverHello.serverShare.group + + earlySecret := hs.earlySecret + if !hs.usingPSK { + earlySecret = tls13.NewEarlySecret(hs.suite.hash.New, nil) + } + + handshakeSecret := earlySecret.HandshakeSecret(sharedKey) + + clientSecret := handshakeSecret.ClientHandshakeTrafficSecret(hs.transcript) + c.out.setTrafficSecret(hs.suite, QUICEncryptionLevelHandshake, clientSecret) + serverSecret := handshakeSecret.ServerHandshakeTrafficSecret(hs.transcript) + c.in.setTrafficSecret(hs.suite, QUICEncryptionLevelHandshake, serverSecret) + + if c.quic != nil { + if c.hand.Len() != 0 { + c.sendAlert(alertUnexpectedMessage) + } + c.quicSetWriteSecret(QUICEncryptionLevelHandshake, hs.suite.id, clientSecret) + c.quicSetReadSecret(QUICEncryptionLevelHandshake, hs.suite.id, serverSecret) + } + + err = c.config.writeKeyLog(keyLogLabelClientHandshake, hs.hello.random, clientSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + err = c.config.writeKeyLog(keyLogLabelServerHandshake, hs.hello.random, serverSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + + hs.masterSecret = handshakeSecret.MasterSecret() + + return nil +} + +func (hs *clientHandshakeStateTLS13) readServerParameters() error { + c := hs.c + + msg, err := c.readHandshake(hs.transcript) + if err != nil { + return err + } + + encryptedExtensions, ok := msg.(*encryptedExtensionsMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(encryptedExtensions, msg) + } + + if err := checkALPN(hs.hello.alpnProtocols, encryptedExtensions.alpnProtocol, c.quic != nil); err != nil { + // RFC 8446 specifies that no_application_protocol is sent by servers, but + // does not specify how clients handle the selection of an incompatible protocol. + // RFC 9001 Section 8.1 specifies that QUIC clients send no_application_protocol + // in this case. Always sending no_application_protocol seems reasonable. + c.sendAlert(alertNoApplicationProtocol) + return err + } + c.clientProtocol = encryptedExtensions.alpnProtocol + + // [UTLS SECTION STARTS] + if hs.uconn != nil { + err = hs.utlsReadServerParameters(encryptedExtensions) + if err != nil { + c.sendAlert(alertUnsupportedExtension) + return err + } + } + // [UTLS SECTION ENDS] + + if c.quic != nil { + if encryptedExtensions.quicTransportParameters == nil { + // RFC 9001 Section 8.2. + c.sendAlert(alertMissingExtension) + return errors.New("tls: server did not send a quic_transport_parameters extension") + } + c.quicSetTransportParameters(encryptedExtensions.quicTransportParameters) + } else { + if encryptedExtensions.quicTransportParameters != nil { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: server sent an unexpected quic_transport_parameters extension") + } + } + + if !hs.hello.earlyData && encryptedExtensions.earlyData { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: server sent an unexpected early_data extension") + } + if hs.hello.earlyData && !encryptedExtensions.earlyData { + c.quicRejectedEarlyData() + } + if encryptedExtensions.earlyData { + if hs.session.cipherSuite != c.cipherSuite { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: server accepted 0-RTT with the wrong cipher suite") + } + if hs.session.alpnProtocol != c.clientProtocol { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: server accepted 0-RTT with the wrong ALPN") + } + } + if hs.echContext != nil { + if hs.echContext.echRejected { + hs.echContext.retryConfigs = encryptedExtensions.echRetryConfigs + } else if encryptedExtensions.echRetryConfigs != nil { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: server sent encrypted client hello retry configs after accepting encrypted client hello") + } + } + + return nil +} + +func (hs *clientHandshakeStateTLS13) readServerCertificate() error { + c := hs.c + + // Either a PSK or a certificate is always used, but not both. + // See RFC 8446, Section 4.1.1. + if hs.usingPSK { + // Make sure the connection is still being verified whether or not this + // is a resumption. Resumptions currently don't reverify certificates so + // they don't call verifyServerCertificate. See Issue 31641. + if c.config.VerifyConnection != nil { + if err := c.config.VerifyConnection(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + return nil + } + + // [UTLS SECTION BEGINS] + // msg, err := c.readHandshake(hs.transcript) + msg, err := c.readHandshake(nil) // hold writing to transcript until we know it is not compressed cert + // [UTLS SECTION ENDS] + if err != nil { + return err + } + + certReq, ok := msg.(*certificateRequestMsgTLS13) + if ok { + hs.certReq = certReq + transcriptMsg(certReq, hs.transcript) // [UTLS] if it is certReq (not compressedCert), write to transcript + + // msg, err = c.readHandshake(hs.transcript) + msg, err = c.readHandshake(nil) // [UTLS] we don't write to transcript until make sure it is not compressed cert + if err != nil { + return err + } + } + + // [UTLS SECTION BEGINS] + var skipWritingCertToTranscript bool = false + if hs.uconn != nil { + processedMsg, err := hs.utlsReadServerCertificate(msg) + if err != nil { + return err + } + if processedMsg != nil { + skipWritingCertToTranscript = true + msg = processedMsg // msg is now a processed-by-extension certificateMsg + } + } + // [UTLS SECTION ENDS] + + certMsg, ok := msg.(*certificateMsgTLS13) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(certMsg, msg) + } + if len(certMsg.certificate.Certificate) == 0 { + c.sendAlert(alertDecodeError) + return errors.New("tls: received empty certificates message") + } + // [UTLS SECTION BEGINS] + if !skipWritingCertToTranscript { // write to transcript only if it is not compressedCert (i.e. if not processed by extension) + if err = transcriptMsg(certMsg, hs.transcript); err != nil { + return err + } + } + // [UTLS SECTION ENDS] + + c.scts = certMsg.certificate.SignedCertificateTimestamps + c.ocspResponse = certMsg.certificate.OCSPStaple + + if err := c.verifyServerCertificate(certMsg.certificate.Certificate); err != nil { + return err + } + + // certificateVerifyMsg is included in the transcript, but not until + // after we verify the handshake signature, since the state before + // this message was sent is used. + msg, err = c.readHandshake(nil) + if err != nil { + return err + } + + certVerify, ok := msg.(*certificateVerifyMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(certVerify, msg) + } + + // See RFC 8446, Section 4.4.3. + if !isSupportedSignatureAlgorithm(certVerify.signatureAlgorithm, c.config.supportedSignatureAlgorithms()) { // [UTLS] ported from cloudflare/go + c.sendAlert(alertIllegalParameter) + return errors.New("tls: certificate used with invalid signature algorithm") + } + sigType, sigHash, err := typeAndHashFromSignatureScheme(certVerify.signatureAlgorithm) + if err != nil { + return c.sendAlert(alertInternalError) + } + if sigType == signaturePKCS1v15 || sigHash == crypto.SHA1 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: certificate used with invalid signature algorithm") + } + signed := signedMessage(sigHash, serverSignatureContext, hs.transcript) + if err := verifyHandshakeSignature(sigType, c.peerCertificates[0].PublicKey, + sigHash, signed, certVerify.signature); err != nil { + c.sendAlert(alertDecryptError) + return errors.New("tls: invalid signature by the server certificate: " + err.Error()) + } + + if err := transcriptMsg(certVerify, hs.transcript); err != nil { + return err + } + + return nil +} + +func (hs *clientHandshakeStateTLS13) readServerFinished() error { + c := hs.c + + // finishedMsg is included in the transcript, but not until after we + // check the client version, since the state before this message was + // sent is used during verification. + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + + finished, ok := msg.(*finishedMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(finished, msg) + } + + expectedMAC := hs.suite.finishedHash(c.in.trafficSecret, hs.transcript) + if !hmac.Equal(expectedMAC, finished.verifyData) { + c.sendAlert(alertDecryptError) + return errors.New("tls: invalid server finished hash") + } + + if err := transcriptMsg(finished, hs.transcript); err != nil { + return err + } + + // Derive secrets that take context through the server Finished. + + hs.trafficSecret = hs.masterSecret.ClientApplicationTrafficSecret(hs.transcript) + serverSecret := hs.masterSecret.ServerApplicationTrafficSecret(hs.transcript) + c.in.setTrafficSecret(hs.suite, QUICEncryptionLevelApplication, serverSecret) + + err = c.config.writeKeyLog(keyLogLabelClientTraffic, hs.hello.random, hs.trafficSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + err = c.config.writeKeyLog(keyLogLabelServerTraffic, hs.hello.random, serverSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + + c.ekm = hs.suite.exportKeyingMaterial(hs.masterSecret, hs.transcript) + + return nil +} + +func (hs *clientHandshakeStateTLS13) sendClientCertificate() error { + c := hs.c + + if hs.certReq == nil { + return nil + } + + if hs.echContext != nil && hs.echContext.echRejected { + if _, err := hs.c.writeHandshakeRecord(&certificateMsgTLS13{}, hs.transcript); err != nil { + return err + } + return nil + } + + cert, err := c.getClientCertificate(&CertificateRequestInfo{ + AcceptableCAs: hs.certReq.certificateAuthorities, + SignatureSchemes: hs.certReq.supportedSignatureAlgorithms, + Version: c.vers, + ctx: hs.ctx, + }) + if err != nil { + return err + } + + certMsg := new(certificateMsgTLS13) + + certMsg.certificate = *cert + certMsg.scts = hs.certReq.scts && len(cert.SignedCertificateTimestamps) > 0 + certMsg.ocspStapling = hs.certReq.ocspStapling && len(cert.OCSPStaple) > 0 + + if _, err := hs.c.writeHandshakeRecord(certMsg, hs.transcript); err != nil { + return err + } + + // If we sent an empty certificate message, skip the CertificateVerify. + if len(cert.Certificate) == 0 { + return nil + } + + certVerifyMsg := new(certificateVerifyMsg) + certVerifyMsg.hasSignatureAlgorithm = true + + certVerifyMsg.signatureAlgorithm, err = selectSignatureScheme(c.vers, cert, hs.certReq.supportedSignatureAlgorithms) + if err != nil { + // getClientCertificate returned a certificate incompatible with the + // CertificateRequestInfo supported signature algorithms. + c.sendAlert(alertHandshakeFailure) + return err + } + + sigType, sigHash, err := typeAndHashFromSignatureScheme(certVerifyMsg.signatureAlgorithm) + if err != nil { + return c.sendAlert(alertInternalError) + } + + signed := signedMessage(sigHash, clientSignatureContext, hs.transcript) + signOpts := crypto.SignerOpts(sigHash) + if sigType == signatureRSAPSS { + signOpts = &rsa.PSSOptions{SaltLength: rsa.PSSSaltLengthEqualsHash, Hash: sigHash} + } + sig, err := cert.PrivateKey.(crypto.Signer).Sign(c.config.rand(), signed, signOpts) + if err != nil { + c.sendAlert(alertInternalError) + return errors.New("tls: failed to sign handshake: " + err.Error()) + } + certVerifyMsg.signature = sig + + if _, err := hs.c.writeHandshakeRecord(certVerifyMsg, hs.transcript); err != nil { + return err + } + + return nil +} + +func (hs *clientHandshakeStateTLS13) sendClientFinished() error { + c := hs.c + + finished := &finishedMsg{ + verifyData: hs.suite.finishedHash(c.out.trafficSecret, hs.transcript), + } + + if _, err := hs.c.writeHandshakeRecord(finished, hs.transcript); err != nil { + return err + } + + c.out.setTrafficSecret(hs.suite, QUICEncryptionLevelApplication, hs.trafficSecret) + + if !c.config.SessionTicketsDisabled && c.config.ClientSessionCache != nil { + c.resumptionSecret = hs.masterSecret.ResumptionMasterSecret(hs.transcript) + } + + if c.quic != nil { + if c.hand.Len() != 0 { + c.sendAlert(alertUnexpectedMessage) + } + c.quicSetWriteSecret(QUICEncryptionLevelApplication, hs.suite.id, hs.trafficSecret) + } + + return nil +} + +func (c *Conn) handleNewSessionTicket(msg *newSessionTicketMsgTLS13) error { + if !c.isClient { + c.sendAlert(alertUnexpectedMessage) + return errors.New("tls: received new session ticket from a client") + } + + if c.config.SessionTicketsDisabled || c.config.ClientSessionCache == nil { + return nil + } + + // See RFC 8446, Section 4.6.1. + if msg.lifetime == 0 { + return nil + } + lifetime := time.Duration(msg.lifetime) * time.Second + if lifetime > maxSessionTicketLifetime { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: received a session ticket with invalid lifetime") + } + + // RFC 9001, Section 4.6.1 + if c.quic != nil && msg.maxEarlyData != 0 && msg.maxEarlyData != 0xffffffff { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid early data for QUIC connection") + } + + cipherSuite := cipherSuiteTLS13ByID(c.cipherSuite) + if cipherSuite == nil || c.resumptionSecret == nil { + return c.sendAlert(alertInternalError) + } + + psk := tls13.ExpandLabel(cipherSuite.hash.New, c.resumptionSecret, "resumption", + msg.nonce, cipherSuite.hash.Size()) + + session := c.sessionState() + session.secret = psk + session.useBy = uint64(c.config.time().Add(lifetime).Unix()) + session.ageAdd = msg.ageAdd + session.EarlyData = c.quic != nil && msg.maxEarlyData == 0xffffffff // RFC 9001, Section 4.6.1 + session.ticket = msg.label + if c.quic != nil && c.quic.enableSessionEvents { + c.quicStoreSession(session) + return nil + } + cs := &ClientSessionState{session: session} + if cacheKey := c.clientSessionCacheKey(); cacheKey != "" { + c.config.ClientSessionCache.Put(cacheKey, cs) + } + + return nil +} diff --git a/backend/vendor/github.com/refraction-networking/utls/handshake_messages.go b/backend/vendor/github.com/refraction-networking/utls/handshake_messages.go new file mode 100644 index 0000000..3b1d341 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/handshake_messages.go @@ -0,0 +1,1996 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "errors" + "fmt" + "slices" + "strings" + + "golang.org/x/crypto/cryptobyte" +) + +// The marshalingFunction type is an adapter to allow the use of ordinary +// functions as cryptobyte.MarshalingValue. +type marshalingFunction func(b *cryptobyte.Builder) error + +func (f marshalingFunction) Marshal(b *cryptobyte.Builder) error { + return f(b) +} + +// addBytesWithLength appends a sequence of bytes to the cryptobyte.Builder. If +// the length of the sequence is not the value specified, it produces an error. +func addBytesWithLength(b *cryptobyte.Builder, v []byte, n int) { + b.AddValue(marshalingFunction(func(b *cryptobyte.Builder) error { + if len(v) != n { + return fmt.Errorf("invalid value length: expected %d, got %d", n, len(v)) + } + b.AddBytes(v) + return nil + })) +} + +// addUint64 appends a big-endian, 64-bit value to the cryptobyte.Builder. +func addUint64(b *cryptobyte.Builder, v uint64) { + b.AddUint32(uint32(v >> 32)) + b.AddUint32(uint32(v)) +} + +// readUint64 decodes a big-endian, 64-bit value into out and advances over it. +// It reports whether the read was successful. +func readUint64(s *cryptobyte.String, out *uint64) bool { + var hi, lo uint32 + if !s.ReadUint32(&hi) || !s.ReadUint32(&lo) { + return false + } + *out = uint64(hi)<<32 | uint64(lo) + return true +} + +// readUint8LengthPrefixed acts like s.ReadUint8LengthPrefixed, but targets a +// []byte instead of a cryptobyte.String. +func readUint8LengthPrefixed(s *cryptobyte.String, out *[]byte) bool { + return s.ReadUint8LengthPrefixed((*cryptobyte.String)(out)) +} + +// readUint16LengthPrefixed acts like s.ReadUint16LengthPrefixed, but targets a +// []byte instead of a cryptobyte.String. +func readUint16LengthPrefixed(s *cryptobyte.String, out *[]byte) bool { + return s.ReadUint16LengthPrefixed((*cryptobyte.String)(out)) +} + +// readUint24LengthPrefixed acts like s.ReadUint24LengthPrefixed, but targets a +// []byte instead of a cryptobyte.String. +func readUint24LengthPrefixed(s *cryptobyte.String, out *[]byte) bool { + return s.ReadUint24LengthPrefixed((*cryptobyte.String)(out)) +} + +type clientHelloMsg struct { + original []byte + vers uint16 + random []byte + sessionId []byte + cipherSuites []uint16 + compressionMethods []uint8 + serverName string + ocspStapling bool + supportedCurves []CurveID + supportedPoints []uint8 + ticketSupported bool + sessionTicket []uint8 + supportedSignatureAlgorithms []SignatureScheme + supportedSignatureAlgorithmsCert []SignatureScheme + secureRenegotiationSupported bool + secureRenegotiation []byte + extendedMasterSecret bool + alpnProtocols []string + scts bool + // ems bool // [uTLS] actually implemented due to its prevalence // removed since crypto/tls implements it + supportedVersions []uint16 + cookie []byte + keyShares []keyShare + earlyData bool + pskModes []uint8 + pskIdentities []pskIdentity + pskBinders [][]byte + quicTransportParameters []byte + encryptedClientHello []byte + // extensions are only populated on the server-side of a handshake + extensions []uint16 + + // [uTLS] + nextProtoNeg bool +} + +func (m *clientHelloMsg) marshalMsg(echInner bool) ([]byte, error) { + // [uTLS SECTION BEGIN] + return m.marshalMsgReorderOuterExts(echInner, nil) +} + +func (m *clientHelloMsg) marshalMsgReorderOuterExts(echInner bool, outerExts []uint16) ([]byte, error) { + // [uTLS SECTION END] + var exts cryptobyte.Builder + if len(m.serverName) > 0 { + // RFC 6066, Section 3 + exts.AddUint16(extensionServerName) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8(0) // name_type = host_name + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes([]byte(m.serverName)) + }) + }) + }) + } + if len(m.supportedPoints) > 0 && !echInner { + // RFC 4492, Section 5.1.2 + exts.AddUint16(extensionSupportedPoints) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.supportedPoints) + }) + }) + } + if m.ticketSupported && !echInner { + // RFC 5077, Section 3.2 + exts.AddUint16(extensionSessionTicket) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.sessionTicket) + }) + } + if m.secureRenegotiationSupported && !echInner { + // RFC 5746, Section 3.2 + exts.AddUint16(extensionRenegotiationInfo) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.secureRenegotiation) + }) + }) + } + if m.extendedMasterSecret && !echInner { + // RFC 7627 + exts.AddUint16(extensionExtendedMasterSecret) + exts.AddUint16(0) // empty extension_data + } + if m.scts { + // RFC 6962, Section 3.3.1 + exts.AddUint16(extensionSCT) + exts.AddUint16(0) // empty extension_data + } + if m.earlyData { + // RFC 8446, Section 4.2.10 + exts.AddUint16(extensionEarlyData) + exts.AddUint16(0) // empty extension_data + } + if m.quicTransportParameters != nil { // marshal zero-length parameters when present + // RFC 9001, Section 8.2 + exts.AddUint16(extensionQUICTransportParameters) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.quicTransportParameters) + }) + } + if len(m.encryptedClientHello) > 0 { + exts.AddUint16(extensionEncryptedClientHello) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.encryptedClientHello) + }) + } + // Note that any extension that can be compressed during ECH must be + // contiguous. If any additional extensions are to be compressed they must + // be added to the following block, so that they can be properly + // decompressed on the other side. + var echOuterExts []uint16 + if m.ocspStapling { + // RFC 4366, Section 3.6 + if echInner { + echOuterExts = append(echOuterExts, extensionStatusRequest) + } else { + exts.AddUint16(extensionStatusRequest) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8(1) // status_type = ocsp + exts.AddUint16(0) // empty responder_id_list + exts.AddUint16(0) // empty request_extensions + }) + } + } + if len(m.supportedCurves) > 0 { + // RFC 4492, sections 5.1.1 and RFC 8446, Section 4.2.7 + if echInner { + echOuterExts = append(echOuterExts, extensionSupportedCurves) + } else { + exts.AddUint16(extensionSupportedCurves) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, curve := range m.supportedCurves { + exts.AddUint16(uint16(curve)) + } + }) + }) + } + } + if len(m.supportedSignatureAlgorithms) > 0 { + // RFC 5246, Section 7.4.1.4.1 + if echInner { + echOuterExts = append(echOuterExts, extensionSignatureAlgorithms) + } else { + exts.AddUint16(extensionSignatureAlgorithms) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, sigAlgo := range m.supportedSignatureAlgorithms { + exts.AddUint16(uint16(sigAlgo)) + } + }) + }) + } + } + if len(m.supportedSignatureAlgorithmsCert) > 0 { + // RFC 8446, Section 4.2.3 + if echInner { + echOuterExts = append(echOuterExts, extensionSignatureAlgorithmsCert) + } else { + exts.AddUint16(extensionSignatureAlgorithmsCert) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, sigAlgo := range m.supportedSignatureAlgorithmsCert { + exts.AddUint16(uint16(sigAlgo)) + } + }) + }) + } + } + if len(m.alpnProtocols) > 0 { + // RFC 7301, Section 3.1 + if echInner { + echOuterExts = append(echOuterExts, extensionALPN) + } else { + exts.AddUint16(extensionALPN) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, proto := range m.alpnProtocols { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes([]byte(proto)) + }) + } + }) + }) + } + } + if len(m.supportedVersions) > 0 { + // RFC 8446, Section 4.2.1 + if echInner && outerExts == nil { // uTLS + echOuterExts = append(echOuterExts, extensionSupportedVersions) + } else { + exts.AddUint16(extensionSupportedVersions) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, vers := range m.supportedVersions { + exts.AddUint16(vers) + } + }) + }) + } + } + if len(m.cookie) > 0 { + // RFC 8446, Section 4.2.2 + if echInner { + echOuterExts = append(echOuterExts, extensionCookie) + } else { + exts.AddUint16(extensionCookie) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.cookie) + }) + }) + } + } + if len(m.keyShares) > 0 { + // RFC 8446, Section 4.2.8 + if echInner { + echOuterExts = append(echOuterExts, extensionKeyShare) + } else { + exts.AddUint16(extensionKeyShare) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, ks := range m.keyShares { + exts.AddUint16(uint16(ks.group)) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(ks.data) + }) + } + }) + }) + } + } + if len(m.pskModes) > 0 { + // RFC 8446, Section 4.2.9 + if echInner { + echOuterExts = append(echOuterExts, extensionPSKModes) + } else { + exts.AddUint16(extensionPSKModes) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.pskModes) + }) + }) + } + } + // [uTLS SECTION BEGIN] + // reorder OuterExtensions according to their order in the spec + if echInner && outerExts != nil { + echOuterExtsReordered := slices.Collect(func(yield func(uint16) bool) { + for _, ext := range outerExts { + if slices.Contains(echOuterExts, ext) { + if !yield(ext) { + return + } + } + } + }) + echOuterExts = echOuterExtsReordered + } + // [uTLS SECTION END] + if len(echOuterExts) > 0 && echInner { + exts.AddUint16(extensionECHOuterExtensions) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, e := range echOuterExts { + exts.AddUint16(e) + } + }) + }) + } + if len(m.pskIdentities) > 0 { // pre_shared_key must be the last extension + // RFC 8446, Section 4.2.11 + exts.AddUint16(extensionPreSharedKey) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, psk := range m.pskIdentities { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(psk.label) + }) + exts.AddUint32(psk.obfuscatedTicketAge) + } + }) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, binder := range m.pskBinders { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(binder) + }) + } + }) + }) + } + extBytes, err := exts.Bytes() + if err != nil { + return nil, err + } + + var b cryptobyte.Builder + b.AddUint8(typeClientHello) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16(m.vers) + addBytesWithLength(b, m.random, 32) + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + if !echInner { + b.AddBytes(m.sessionId) + } + }) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + for _, suite := range m.cipherSuites { + b.AddUint16(suite) + } + }) + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.compressionMethods) + }) + + if len(extBytes) > 0 { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(extBytes) + }) + } + }) + + return b.Bytes() +} + +func (m *clientHelloMsg) marshal() ([]byte, error) { + // [uTLS SECTION START] + if m.original != nil { + return m.original, nil + } + // [uTLS SECTION END] + + return m.marshalMsg(false) +} + +// marshalWithoutBinders returns the ClientHello through the +// PreSharedKeyExtension.identities field, according to RFC 8446, Section +// 4.2.11.2. Note that m.pskBinders must be set to slices of the correct length. +func (m *clientHelloMsg) marshalWithoutBinders() ([]byte, error) { + bindersLen := 2 // uint16 length prefix + for _, binder := range m.pskBinders { + bindersLen += 1 // uint8 length prefix + bindersLen += len(binder) + } + + var fullMessage []byte + if m.original != nil { + fullMessage = m.original + } else { + var err error + fullMessage, err = m.marshal() + if err != nil { + return nil, err + } + } + return fullMessage[:len(fullMessage)-bindersLen], nil +} + +// updateBinders updates the m.pskBinders field. The supplied binders must have +// the same length as the current m.pskBinders. +func (m *clientHelloMsg) updateBinders(pskBinders [][]byte) error { + if len(pskBinders) != len(m.pskBinders) { + return errors.New("tls: internal error: pskBinders length mismatch") + } + for i := range m.pskBinders { + if len(pskBinders[i]) != len(m.pskBinders[i]) { + return errors.New("tls: internal error: pskBinders length mismatch") + } + } + m.pskBinders = pskBinders + + return nil +} + +func (m *clientHelloMsg) unmarshal(data []byte) bool { + *m = clientHelloMsg{original: data} + s := cryptobyte.String(data) + + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint16(&m.vers) || !s.ReadBytes(&m.random, 32) || + !readUint8LengthPrefixed(&s, &m.sessionId) { + return false + } + + var cipherSuites cryptobyte.String + if !s.ReadUint16LengthPrefixed(&cipherSuites) { + return false + } + m.cipherSuites = []uint16{} + m.secureRenegotiationSupported = false + for !cipherSuites.Empty() { + var suite uint16 + if !cipherSuites.ReadUint16(&suite) { + return false + } + if suite == scsvRenegotiation { + m.secureRenegotiationSupported = true + } + m.cipherSuites = append(m.cipherSuites, suite) + } + + if !readUint8LengthPrefixed(&s, &m.compressionMethods) { + return false + } + + if s.Empty() { + // ClientHello is optionally followed by extension data + return true + } + + var extensions cryptobyte.String + if !s.ReadUint16LengthPrefixed(&extensions) || !s.Empty() { + return false + } + + seenExts := make(map[uint16]bool) + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return false + } + + if seenExts[extension] { + return false + } + seenExts[extension] = true + m.extensions = append(m.extensions, extension) + + switch extension { + case extensionServerName: + // RFC 6066, Section 3 + var nameList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&nameList) || nameList.Empty() { + return false + } + for !nameList.Empty() { + var nameType uint8 + var serverName cryptobyte.String + if !nameList.ReadUint8(&nameType) || + !nameList.ReadUint16LengthPrefixed(&serverName) || + serverName.Empty() { + return false + } + if nameType != 0 { + continue + } + if len(m.serverName) != 0 { + // Multiple names of the same name_type are prohibited. + return false + } + m.serverName = string(serverName) + // An SNI value may not include a trailing dot. + if strings.HasSuffix(m.serverName, ".") { + return false + } + } + case extensionStatusRequest: + // RFC 4366, Section 3.6 + var statusType uint8 + var ignored cryptobyte.String + if !extData.ReadUint8(&statusType) || + !extData.ReadUint16LengthPrefixed(&ignored) || + !extData.ReadUint16LengthPrefixed(&ignored) { + return false + } + m.ocspStapling = statusType == statusTypeOCSP + case extensionSupportedCurves: + // RFC 4492, sections 5.1.1 and RFC 8446, Section 4.2.7 + var curves cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&curves) || curves.Empty() { + return false + } + for !curves.Empty() { + var curve uint16 + if !curves.ReadUint16(&curve) { + return false + } + m.supportedCurves = append(m.supportedCurves, CurveID(curve)) + } + case extensionSupportedPoints: + // RFC 4492, Section 5.1.2 + if !readUint8LengthPrefixed(&extData, &m.supportedPoints) || + len(m.supportedPoints) == 0 { + return false + } + case extensionSessionTicket: + // RFC 5077, Section 3.2 + m.ticketSupported = true + extData.ReadBytes(&m.sessionTicket, len(extData)) + case extensionSignatureAlgorithms: + // RFC 5246, Section 7.4.1.4.1 + var sigAndAlgs cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sigAndAlgs) || sigAndAlgs.Empty() { + return false + } + for !sigAndAlgs.Empty() { + var sigAndAlg uint16 + if !sigAndAlgs.ReadUint16(&sigAndAlg) { + return false + } + m.supportedSignatureAlgorithms = append( + m.supportedSignatureAlgorithms, SignatureScheme(sigAndAlg)) + } + case extensionSignatureAlgorithmsCert: + // RFC 8446, Section 4.2.3 + var sigAndAlgs cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sigAndAlgs) || sigAndAlgs.Empty() { + return false + } + for !sigAndAlgs.Empty() { + var sigAndAlg uint16 + if !sigAndAlgs.ReadUint16(&sigAndAlg) { + return false + } + m.supportedSignatureAlgorithmsCert = append( + m.supportedSignatureAlgorithmsCert, SignatureScheme(sigAndAlg)) + } + case extensionRenegotiationInfo: + // RFC 5746, Section 3.2 + if !readUint8LengthPrefixed(&extData, &m.secureRenegotiation) { + return false + } + m.secureRenegotiationSupported = true + case extensionExtendedMasterSecret: + // RFC 7627 + m.extendedMasterSecret = true + case extensionALPN: + // RFC 7301, Section 3.1 + var protoList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&protoList) || protoList.Empty() { + return false + } + for !protoList.Empty() { + var proto cryptobyte.String + if !protoList.ReadUint8LengthPrefixed(&proto) || proto.Empty() { + return false + } + m.alpnProtocols = append(m.alpnProtocols, string(proto)) + } + case extensionSCT: + // RFC 6962, Section 3.3.1 + m.scts = true + case extensionSupportedVersions: + // RFC 8446, Section 4.2.1 + var versList cryptobyte.String + if !extData.ReadUint8LengthPrefixed(&versList) || versList.Empty() { + return false + } + for !versList.Empty() { + var vers uint16 + if !versList.ReadUint16(&vers) { + return false + } + m.supportedVersions = append(m.supportedVersions, vers) + } + case extensionCookie: + // RFC 8446, Section 4.2.2 + if !readUint16LengthPrefixed(&extData, &m.cookie) || + len(m.cookie) == 0 { + return false + } + case extensionKeyShare: + // RFC 8446, Section 4.2.8 + var clientShares cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&clientShares) { + return false + } + for !clientShares.Empty() { + var ks keyShare + if !clientShares.ReadUint16((*uint16)(&ks.group)) || + !readUint16LengthPrefixed(&clientShares, &ks.data) || + len(ks.data) == 0 { + return false + } + m.keyShares = append(m.keyShares, ks) + } + case extensionEarlyData: + // RFC 8446, Section 4.2.10 + m.earlyData = true + case extensionPSKModes: + // RFC 8446, Section 4.2.9 + if !readUint8LengthPrefixed(&extData, &m.pskModes) { + return false + } + case extensionQUICTransportParameters: + m.quicTransportParameters = make([]byte, len(extData)) + if !extData.CopyBytes(m.quicTransportParameters) { + return false + } + case extensionPreSharedKey: + // RFC 8446, Section 4.2.11 + if !extensions.Empty() { + return false // pre_shared_key must be the last extension + } + var identities cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&identities) || identities.Empty() { + return false + } + for !identities.Empty() { + var psk pskIdentity + if !readUint16LengthPrefixed(&identities, &psk.label) || + !identities.ReadUint32(&psk.obfuscatedTicketAge) || + len(psk.label) == 0 { + return false + } + m.pskIdentities = append(m.pskIdentities, psk) + } + var binders cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&binders) || binders.Empty() { + return false + } + for !binders.Empty() { + var binder []byte + if !readUint8LengthPrefixed(&binders, &binder) || + len(binder) == 0 { + return false + } + m.pskBinders = append(m.pskBinders, binder) + } + case extensionEncryptedClientHello: + if !extData.ReadBytes(&m.encryptedClientHello, len(extData)) { + return false + } + default: + // Ignore unknown extensions. + continue + } + + if !extData.Empty() { + return false + } + } + + return true +} + +func (m *clientHelloMsg) originalBytes() []byte { + return m.original +} + +func (m *clientHelloMsg) clone() *clientHelloMsg { + return &clientHelloMsg{ + original: slices.Clone(m.original), + vers: m.vers, + random: slices.Clone(m.random), + sessionId: slices.Clone(m.sessionId), + cipherSuites: slices.Clone(m.cipherSuites), + compressionMethods: slices.Clone(m.compressionMethods), + serverName: m.serverName, + ocspStapling: m.ocspStapling, + supportedCurves: slices.Clone(m.supportedCurves), + supportedPoints: slices.Clone(m.supportedPoints), + ticketSupported: m.ticketSupported, + sessionTicket: slices.Clone(m.sessionTicket), + supportedSignatureAlgorithms: slices.Clone(m.supportedSignatureAlgorithms), + supportedSignatureAlgorithmsCert: slices.Clone(m.supportedSignatureAlgorithmsCert), + secureRenegotiationSupported: m.secureRenegotiationSupported, + secureRenegotiation: slices.Clone(m.secureRenegotiation), + extendedMasterSecret: m.extendedMasterSecret, + alpnProtocols: slices.Clone(m.alpnProtocols), + scts: m.scts, + supportedVersions: slices.Clone(m.supportedVersions), + cookie: slices.Clone(m.cookie), + keyShares: slices.Clone(m.keyShares), + earlyData: m.earlyData, + pskModes: slices.Clone(m.pskModes), + pskIdentities: slices.Clone(m.pskIdentities), + pskBinders: slices.Clone(m.pskBinders), + quicTransportParameters: slices.Clone(m.quicTransportParameters), + encryptedClientHello: slices.Clone(m.encryptedClientHello), + } +} + +type serverHelloMsg struct { + original []byte + vers uint16 + random []byte + sessionId []byte + cipherSuite uint16 + compressionMethod uint8 + ocspStapling bool + ticketSupported bool + secureRenegotiationSupported bool + secureRenegotiation []byte + extendedMasterSecret bool + alpnProtocol string + scts [][]byte + supportedVersion uint16 + serverShare keyShare + selectedIdentityPresent bool + selectedIdentity uint16 + supportedPoints []uint8 + encryptedClientHello []byte + serverNameAck bool + + // HelloRetryRequest extensions + cookie []byte + selectedGroup CurveID + + // [uTLS] + nextProtoNeg bool + nextProtos []string +} + +func (m *serverHelloMsg) marshal() ([]byte, error) { + var exts cryptobyte.Builder + if m.ocspStapling { + exts.AddUint16(extensionStatusRequest) + exts.AddUint16(0) // empty extension_data + } + if m.ticketSupported { + exts.AddUint16(extensionSessionTicket) + exts.AddUint16(0) // empty extension_data + } + if m.secureRenegotiationSupported { + exts.AddUint16(extensionRenegotiationInfo) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.secureRenegotiation) + }) + }) + } + if m.extendedMasterSecret { + exts.AddUint16(extensionExtendedMasterSecret) + exts.AddUint16(0) // empty extension_data + } + if len(m.alpnProtocol) > 0 { + exts.AddUint16(extensionALPN) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes([]byte(m.alpnProtocol)) + }) + }) + }) + } + if len(m.scts) > 0 { + exts.AddUint16(extensionSCT) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + for _, sct := range m.scts { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(sct) + }) + } + }) + }) + } + if m.supportedVersion != 0 { + exts.AddUint16(extensionSupportedVersions) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16(m.supportedVersion) + }) + } + if m.serverShare.group != 0 { + exts.AddUint16(extensionKeyShare) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16(uint16(m.serverShare.group)) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.serverShare.data) + }) + }) + } + if m.selectedIdentityPresent { + exts.AddUint16(extensionPreSharedKey) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16(m.selectedIdentity) + }) + } + + if len(m.cookie) > 0 { + exts.AddUint16(extensionCookie) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.cookie) + }) + }) + } + if m.selectedGroup != 0 { + exts.AddUint16(extensionKeyShare) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint16(uint16(m.selectedGroup)) + }) + } + if len(m.supportedPoints) > 0 { + exts.AddUint16(extensionSupportedPoints) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddUint8LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.supportedPoints) + }) + }) + } + if len(m.encryptedClientHello) > 0 { + exts.AddUint16(extensionEncryptedClientHello) + exts.AddUint16LengthPrefixed(func(exts *cryptobyte.Builder) { + exts.AddBytes(m.encryptedClientHello) + }) + } + if m.serverNameAck { + exts.AddUint16(extensionServerName) + exts.AddUint16(0) + } + + extBytes, err := exts.Bytes() + if err != nil { + return nil, err + } + + var b cryptobyte.Builder + b.AddUint8(typeServerHello) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16(m.vers) + addBytesWithLength(b, m.random, 32) + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.sessionId) + }) + b.AddUint16(m.cipherSuite) + b.AddUint8(m.compressionMethod) + + if len(extBytes) > 0 { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(extBytes) + }) + } + }) + + return b.Bytes() +} + +func (m *serverHelloMsg) unmarshal(data []byte) bool { + *m = serverHelloMsg{original: data} + s := cryptobyte.String(data) + + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint16(&m.vers) || !s.ReadBytes(&m.random, 32) || + !readUint8LengthPrefixed(&s, &m.sessionId) || + !s.ReadUint16(&m.cipherSuite) || + !s.ReadUint8(&m.compressionMethod) { + return false + } + + if s.Empty() { + // ServerHello is optionally followed by extension data + return true + } + + var extensions cryptobyte.String + if !s.ReadUint16LengthPrefixed(&extensions) || !s.Empty() { + return false + } + + seenExts := make(map[uint16]bool) + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return false + } + + if seenExts[extension] { + return false + } + seenExts[extension] = true + + switch extension { + case extensionStatusRequest: + m.ocspStapling = true + case extensionSessionTicket: + m.ticketSupported = true + // [UTLS] crypto/tls finally supports EMS! Now we don't do anything special here. + // case utlsExtensionExtendedMasterSecret: + // // No sanity check for this extension: pretending not to know it. + // // if length > 0 { + // // return false + // // } + // m.ems = true + case extensionRenegotiationInfo: + if !readUint8LengthPrefixed(&extData, &m.secureRenegotiation) { + return false + } + m.secureRenegotiationSupported = true + case extensionExtendedMasterSecret: + m.extendedMasterSecret = true + case extensionALPN: + var protoList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&protoList) || protoList.Empty() { + return false + } + var proto cryptobyte.String + if !protoList.ReadUint8LengthPrefixed(&proto) || + proto.Empty() || !protoList.Empty() { + return false + } + m.alpnProtocol = string(proto) + case extensionSCT: + var sctList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sctList) || sctList.Empty() { + return false + } + for !sctList.Empty() { + var sct []byte + if !readUint16LengthPrefixed(&sctList, &sct) || + len(sct) == 0 { + return false + } + m.scts = append(m.scts, sct) + } + case extensionSupportedVersions: + if !extData.ReadUint16(&m.supportedVersion) { + return false + } + case extensionCookie: + if !readUint16LengthPrefixed(&extData, &m.cookie) || + len(m.cookie) == 0 { + return false + } + case extensionKeyShare: + // This extension has different formats in SH and HRR, accept either + // and let the handshake logic decide. See RFC 8446, Section 4.2.8. + if len(extData) == 2 { + if !extData.ReadUint16((*uint16)(&m.selectedGroup)) { + return false + } + } else { + if !extData.ReadUint16((*uint16)(&m.serverShare.group)) || + !readUint16LengthPrefixed(&extData, &m.serverShare.data) { + return false + } + } + case extensionPreSharedKey: + m.selectedIdentityPresent = true + if !extData.ReadUint16(&m.selectedIdentity) { + return false + } + case extensionSupportedPoints: + // RFC 4492, Section 5.1.2 + if !readUint8LengthPrefixed(&extData, &m.supportedPoints) || + len(m.supportedPoints) == 0 { + return false + } + case extensionEncryptedClientHello: // encrypted_client_hello + m.encryptedClientHello = make([]byte, len(extData)) + if !extData.CopyBytes(m.encryptedClientHello) { + return false + } + case extensionServerName: + if len(extData) != 0 { + return false + } + m.serverNameAck = true + default: + // Ignore unknown extensions. + continue + } + + if !extData.Empty() { + return false + } + } + + return true +} + +func (m *serverHelloMsg) originalBytes() []byte { + return m.original +} + +type encryptedExtensionsMsg struct { + alpnProtocol string + quicTransportParameters []byte + earlyData bool + echRetryConfigs []byte + + utls utlsEncryptedExtensionsMsgExtraFields // [uTLS] +} + +func (m *encryptedExtensionsMsg) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeEncryptedExtensions) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + if len(m.alpnProtocol) > 0 { + b.AddUint16(extensionALPN) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes([]byte(m.alpnProtocol)) + }) + }) + }) + } + if m.quicTransportParameters != nil { // marshal zero-length parameters when present + // draft-ietf-quic-tls-32, Section 8.2 + b.AddUint16(extensionQUICTransportParameters) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.quicTransportParameters) + }) + } + if m.earlyData { + // RFC 8446, Section 4.2.10 + b.AddUint16(extensionEarlyData) + b.AddUint16(0) // empty extension_data + } + if len(m.echRetryConfigs) > 0 { + b.AddUint16(extensionEncryptedClientHello) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.echRetryConfigs) + }) + } + }) + }) + + return b.Bytes() +} + +func (m *encryptedExtensionsMsg) unmarshal(data []byte) bool { + *m = encryptedExtensionsMsg{} + s := cryptobyte.String(data) + + var extensions cryptobyte.String + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint16LengthPrefixed(&extensions) || !s.Empty() { + return false + } + + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return false + } + + switch extension { + case extensionALPN: + var protoList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&protoList) || protoList.Empty() { + return false + } + var proto cryptobyte.String + if !protoList.ReadUint8LengthPrefixed(&proto) || + proto.Empty() || !protoList.Empty() { + return false + } + m.alpnProtocol = string(proto) + case extensionQUICTransportParameters: + m.quicTransportParameters = make([]byte, len(extData)) + if !extData.CopyBytes(m.quicTransportParameters) { + return false + } + case extensionEarlyData: + // RFC 8446, Section 4.2.10 + m.earlyData = true + case extensionEncryptedClientHello: + m.echRetryConfigs = make([]byte, len(extData)) + if !extData.CopyBytes(m.echRetryConfigs) { + return false + } + default: + // [UTLS SECTION START] + if !m.utlsUnmarshal(extension, extData) { + return false // return false when ERROR + } + // [UTLS SECTION END] + // Ignore unknown extensions. + continue + } + + if !extData.Empty() { + return false + } + } + + return true +} + +type endOfEarlyDataMsg struct{} + +func (m *endOfEarlyDataMsg) marshal() ([]byte, error) { + x := make([]byte, 4) + x[0] = typeEndOfEarlyData + return x, nil +} + +func (m *endOfEarlyDataMsg) unmarshal(data []byte) bool { + return len(data) == 4 +} + +type keyUpdateMsg struct { + updateRequested bool +} + +func (m *keyUpdateMsg) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeKeyUpdate) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + if m.updateRequested { + b.AddUint8(1) + } else { + b.AddUint8(0) + } + }) + + return b.Bytes() +} + +func (m *keyUpdateMsg) unmarshal(data []byte) bool { + s := cryptobyte.String(data) + + var updateRequested uint8 + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint8(&updateRequested) || !s.Empty() { + return false + } + switch updateRequested { + case 0: + m.updateRequested = false + case 1: + m.updateRequested = true + default: + return false + } + return true +} + +type newSessionTicketMsgTLS13 struct { + lifetime uint32 + ageAdd uint32 + nonce []byte + label []byte + maxEarlyData uint32 +} + +func (m *newSessionTicketMsgTLS13) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeNewSessionTicket) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint32(m.lifetime) + b.AddUint32(m.ageAdd) + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.nonce) + }) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.label) + }) + + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + if m.maxEarlyData > 0 { + b.AddUint16(extensionEarlyData) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint32(m.maxEarlyData) + }) + } + }) + }) + + return b.Bytes() +} + +func (m *newSessionTicketMsgTLS13) unmarshal(data []byte) bool { + *m = newSessionTicketMsgTLS13{} + s := cryptobyte.String(data) + + var extensions cryptobyte.String + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint32(&m.lifetime) || + !s.ReadUint32(&m.ageAdd) || + !readUint8LengthPrefixed(&s, &m.nonce) || + !readUint16LengthPrefixed(&s, &m.label) || + !s.ReadUint16LengthPrefixed(&extensions) || + !s.Empty() { + return false + } + + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return false + } + + switch extension { + case extensionEarlyData: + if !extData.ReadUint32(&m.maxEarlyData) { + return false + } + default: + // Ignore unknown extensions. + continue + } + + if !extData.Empty() { + return false + } + } + + return true +} + +type certificateRequestMsgTLS13 struct { + ocspStapling bool + scts bool + supportedSignatureAlgorithms []SignatureScheme + supportedSignatureAlgorithmsCert []SignatureScheme + certificateAuthorities [][]byte +} + +func (m *certificateRequestMsgTLS13) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeCertificateRequest) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + // certificate_request_context (SHALL be zero length unless used for + // post-handshake authentication) + b.AddUint8(0) + + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + if m.ocspStapling { + b.AddUint16(extensionStatusRequest) + b.AddUint16(0) // empty extension_data + } + if m.scts { + // RFC 8446, Section 4.4.2.1 makes no mention of + // signed_certificate_timestamp in CertificateRequest, but + // "Extensions in the Certificate message from the client MUST + // correspond to extensions in the CertificateRequest message + // from the server." and it appears in the table in Section 4.2. + b.AddUint16(extensionSCT) + b.AddUint16(0) // empty extension_data + } + if len(m.supportedSignatureAlgorithms) > 0 { + b.AddUint16(extensionSignatureAlgorithms) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + for _, sigAlgo := range m.supportedSignatureAlgorithms { + b.AddUint16(uint16(sigAlgo)) + } + }) + }) + } + if len(m.supportedSignatureAlgorithmsCert) > 0 { + b.AddUint16(extensionSignatureAlgorithmsCert) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + for _, sigAlgo := range m.supportedSignatureAlgorithmsCert { + b.AddUint16(uint16(sigAlgo)) + } + }) + }) + } + if len(m.certificateAuthorities) > 0 { + b.AddUint16(extensionCertificateAuthorities) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + for _, ca := range m.certificateAuthorities { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(ca) + }) + } + }) + }) + } + }) + }) + + return b.Bytes() +} + +func (m *certificateRequestMsgTLS13) unmarshal(data []byte) bool { + *m = certificateRequestMsgTLS13{} + s := cryptobyte.String(data) + + var context, extensions cryptobyte.String + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint8LengthPrefixed(&context) || !context.Empty() || + !s.ReadUint16LengthPrefixed(&extensions) || + !s.Empty() { + return false + } + + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return false + } + + switch extension { + case extensionStatusRequest: + m.ocspStapling = true + case extensionSCT: + m.scts = true + case extensionSignatureAlgorithms: + var sigAndAlgs cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sigAndAlgs) || sigAndAlgs.Empty() { + return false + } + for !sigAndAlgs.Empty() { + var sigAndAlg uint16 + if !sigAndAlgs.ReadUint16(&sigAndAlg) { + return false + } + m.supportedSignatureAlgorithms = append( + m.supportedSignatureAlgorithms, SignatureScheme(sigAndAlg)) + } + case extensionSignatureAlgorithmsCert: + var sigAndAlgs cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sigAndAlgs) || sigAndAlgs.Empty() { + return false + } + for !sigAndAlgs.Empty() { + var sigAndAlg uint16 + if !sigAndAlgs.ReadUint16(&sigAndAlg) { + return false + } + m.supportedSignatureAlgorithmsCert = append( + m.supportedSignatureAlgorithmsCert, SignatureScheme(sigAndAlg)) + } + case extensionCertificateAuthorities: + var auths cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&auths) || auths.Empty() { + return false + } + for !auths.Empty() { + var ca []byte + if !readUint16LengthPrefixed(&auths, &ca) || len(ca) == 0 { + return false + } + m.certificateAuthorities = append(m.certificateAuthorities, ca) + } + default: + // Ignore unknown extensions. + continue + } + + if !extData.Empty() { + return false + } + } + + return true +} + +type certificateMsg struct { + certificates [][]byte +} + +func (m *certificateMsg) marshal() ([]byte, error) { + var i int + for _, slice := range m.certificates { + i += len(slice) + } + + length := 3 + 3*len(m.certificates) + i + x := make([]byte, 4+length) + x[0] = typeCertificate + x[1] = uint8(length >> 16) + x[2] = uint8(length >> 8) + x[3] = uint8(length) + + certificateOctets := length - 3 + x[4] = uint8(certificateOctets >> 16) + x[5] = uint8(certificateOctets >> 8) + x[6] = uint8(certificateOctets) + + y := x[7:] + for _, slice := range m.certificates { + y[0] = uint8(len(slice) >> 16) + y[1] = uint8(len(slice) >> 8) + y[2] = uint8(len(slice)) + copy(y[3:], slice) + y = y[3+len(slice):] + } + + return x, nil +} + +func (m *certificateMsg) unmarshal(data []byte) bool { + if len(data) < 7 { + return false + } + + certsLen := uint32(data[4])<<16 | uint32(data[5])<<8 | uint32(data[6]) + if uint32(len(data)) != certsLen+7 { + return false + } + + numCerts := 0 + d := data[7:] + for certsLen > 0 { + if len(d) < 4 { + return false + } + certLen := uint32(d[0])<<16 | uint32(d[1])<<8 | uint32(d[2]) + if uint32(len(d)) < 3+certLen { + return false + } + d = d[3+certLen:] + certsLen -= 3 + certLen + numCerts++ + } + + m.certificates = make([][]byte, numCerts) + d = data[7:] + for i := 0; i < numCerts; i++ { + certLen := uint32(d[0])<<16 | uint32(d[1])<<8 | uint32(d[2]) + m.certificates[i] = d[3 : 3+certLen] + d = d[3+certLen:] + } + + return true +} + +type certificateMsgTLS13 struct { + certificate Certificate + ocspStapling bool + scts bool +} + +func (m *certificateMsgTLS13) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeCertificate) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint8(0) // certificate_request_context + + certificate := m.certificate + if !m.ocspStapling { + certificate.OCSPStaple = nil + } + if !m.scts { + certificate.SignedCertificateTimestamps = nil + } + marshalCertificate(b, certificate) + }) + + return b.Bytes() +} + +func marshalCertificate(b *cryptobyte.Builder, certificate Certificate) { + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + for i, cert := range certificate.Certificate { + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(cert) + }) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + if i > 0 { + // This library only supports OCSP and SCT for leaf certificates. + return + } + if certificate.OCSPStaple != nil { + b.AddUint16(extensionStatusRequest) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint8(statusTypeOCSP) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(certificate.OCSPStaple) + }) + }) + } + if certificate.SignedCertificateTimestamps != nil { + b.AddUint16(extensionSCT) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + for _, sct := range certificate.SignedCertificateTimestamps { + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(sct) + }) + } + }) + }) + } + }) + } + }) +} + +func (m *certificateMsgTLS13) unmarshal(data []byte) bool { + *m = certificateMsgTLS13{} + s := cryptobyte.String(data) + + var context cryptobyte.String + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint8LengthPrefixed(&context) || !context.Empty() || + !unmarshalCertificate(&s, &m.certificate) || + !s.Empty() { + return false + } + + m.scts = m.certificate.SignedCertificateTimestamps != nil + m.ocspStapling = m.certificate.OCSPStaple != nil + + return true +} + +func unmarshalCertificate(s *cryptobyte.String, certificate *Certificate) bool { + var certList cryptobyte.String + if !s.ReadUint24LengthPrefixed(&certList) { + return false + } + for !certList.Empty() { + var cert []byte + var extensions cryptobyte.String + if !readUint24LengthPrefixed(&certList, &cert) || + !certList.ReadUint16LengthPrefixed(&extensions) { + return false + } + certificate.Certificate = append(certificate.Certificate, cert) + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return false + } + if len(certificate.Certificate) > 1 { + // This library only supports OCSP and SCT for leaf certificates. + continue + } + + switch extension { + case extensionStatusRequest: + var statusType uint8 + if !extData.ReadUint8(&statusType) || statusType != statusTypeOCSP || + !readUint24LengthPrefixed(&extData, &certificate.OCSPStaple) || + len(certificate.OCSPStaple) == 0 { + return false + } + case extensionSCT: + var sctList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sctList) || sctList.Empty() { + return false + } + for !sctList.Empty() { + var sct []byte + if !readUint16LengthPrefixed(&sctList, &sct) || + len(sct) == 0 { + return false + } + certificate.SignedCertificateTimestamps = append( + certificate.SignedCertificateTimestamps, sct) + } + default: + // Ignore unknown extensions. + continue + } + + if !extData.Empty() { + return false + } + } + } + return true +} + +type serverKeyExchangeMsg struct { + key []byte +} + +func (m *serverKeyExchangeMsg) marshal() ([]byte, error) { + length := len(m.key) + x := make([]byte, length+4) + x[0] = typeServerKeyExchange + x[1] = uint8(length >> 16) + x[2] = uint8(length >> 8) + x[3] = uint8(length) + copy(x[4:], m.key) + + return x, nil +} + +func (m *serverKeyExchangeMsg) unmarshal(data []byte) bool { + if len(data) < 4 { + return false + } + m.key = data[4:] + return true +} + +type certificateStatusMsg struct { + response []byte +} + +func (m *certificateStatusMsg) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeCertificateStatus) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint8(statusTypeOCSP) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.response) + }) + }) + + return b.Bytes() +} + +func (m *certificateStatusMsg) unmarshal(data []byte) bool { + s := cryptobyte.String(data) + + var statusType uint8 + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint8(&statusType) || statusType != statusTypeOCSP || + !readUint24LengthPrefixed(&s, &m.response) || + len(m.response) == 0 || !s.Empty() { + return false + } + return true +} + +type serverHelloDoneMsg struct{} + +func (m *serverHelloDoneMsg) marshal() ([]byte, error) { + x := make([]byte, 4) + x[0] = typeServerHelloDone + return x, nil +} + +func (m *serverHelloDoneMsg) unmarshal(data []byte) bool { + return len(data) == 4 +} + +type clientKeyExchangeMsg struct { + ciphertext []byte +} + +func (m *clientKeyExchangeMsg) marshal() ([]byte, error) { + length := len(m.ciphertext) + x := make([]byte, length+4) + x[0] = typeClientKeyExchange + x[1] = uint8(length >> 16) + x[2] = uint8(length >> 8) + x[3] = uint8(length) + copy(x[4:], m.ciphertext) + + return x, nil +} + +func (m *clientKeyExchangeMsg) unmarshal(data []byte) bool { + if len(data) < 4 { + return false + } + l := int(data[1])<<16 | int(data[2])<<8 | int(data[3]) + if l != len(data)-4 { + return false + } + m.ciphertext = data[4:] + return true +} + +type finishedMsg struct { + verifyData []byte +} + +func (m *finishedMsg) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeFinished) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.verifyData) + }) + + return b.Bytes() +} + +func (m *finishedMsg) unmarshal(data []byte) bool { + s := cryptobyte.String(data) + return s.Skip(1) && + readUint24LengthPrefixed(&s, &m.verifyData) && + s.Empty() +} + +type certificateRequestMsg struct { + // hasSignatureAlgorithm indicates whether this message includes a list of + // supported signature algorithms. This change was introduced with TLS 1.2. + hasSignatureAlgorithm bool + + certificateTypes []byte + supportedSignatureAlgorithms []SignatureScheme + certificateAuthorities [][]byte +} + +func (m *certificateRequestMsg) marshal() ([]byte, error) { + // See RFC 4346, Section 7.4.4. + length := 1 + len(m.certificateTypes) + 2 + casLength := 0 + for _, ca := range m.certificateAuthorities { + casLength += 2 + len(ca) + } + length += casLength + + if m.hasSignatureAlgorithm { + length += 2 + 2*len(m.supportedSignatureAlgorithms) + } + + x := make([]byte, 4+length) + x[0] = typeCertificateRequest + x[1] = uint8(length >> 16) + x[2] = uint8(length >> 8) + x[3] = uint8(length) + + x[4] = uint8(len(m.certificateTypes)) + + copy(x[5:], m.certificateTypes) + y := x[5+len(m.certificateTypes):] + + if m.hasSignatureAlgorithm { + n := len(m.supportedSignatureAlgorithms) * 2 + y[0] = uint8(n >> 8) + y[1] = uint8(n) + y = y[2:] + for _, sigAlgo := range m.supportedSignatureAlgorithms { + y[0] = uint8(sigAlgo >> 8) + y[1] = uint8(sigAlgo) + y = y[2:] + } + } + + y[0] = uint8(casLength >> 8) + y[1] = uint8(casLength) + y = y[2:] + for _, ca := range m.certificateAuthorities { + y[0] = uint8(len(ca) >> 8) + y[1] = uint8(len(ca)) + y = y[2:] + copy(y, ca) + y = y[len(ca):] + } + + return x, nil +} + +func (m *certificateRequestMsg) unmarshal(data []byte) bool { + if len(data) < 5 { + return false + } + + length := uint32(data[1])<<16 | uint32(data[2])<<8 | uint32(data[3]) + if uint32(len(data))-4 != length { + return false + } + + numCertTypes := int(data[4]) + data = data[5:] + if numCertTypes == 0 || len(data) <= numCertTypes { + return false + } + + m.certificateTypes = make([]byte, numCertTypes) + if copy(m.certificateTypes, data) != numCertTypes { + return false + } + + data = data[numCertTypes:] + + if m.hasSignatureAlgorithm { + if len(data) < 2 { + return false + } + sigAndHashLen := uint16(data[0])<<8 | uint16(data[1]) + data = data[2:] + if sigAndHashLen&1 != 0 { + return false + } + if len(data) < int(sigAndHashLen) { + return false + } + numSigAlgos := sigAndHashLen / 2 + m.supportedSignatureAlgorithms = make([]SignatureScheme, numSigAlgos) + for i := range m.supportedSignatureAlgorithms { + m.supportedSignatureAlgorithms[i] = SignatureScheme(data[0])<<8 | SignatureScheme(data[1]) + data = data[2:] + } + } + + if len(data) < 2 { + return false + } + casLength := uint16(data[0])<<8 | uint16(data[1]) + data = data[2:] + if len(data) < int(casLength) { + return false + } + cas := make([]byte, casLength) + copy(cas, data) + data = data[casLength:] + + m.certificateAuthorities = nil + for len(cas) > 0 { + if len(cas) < 2 { + return false + } + caLen := uint16(cas[0])<<8 | uint16(cas[1]) + cas = cas[2:] + + if len(cas) < int(caLen) { + return false + } + + m.certificateAuthorities = append(m.certificateAuthorities, cas[:caLen]) + cas = cas[caLen:] + } + + return len(data) == 0 +} + +type certificateVerifyMsg struct { + hasSignatureAlgorithm bool // format change introduced in TLS 1.2 + signatureAlgorithm SignatureScheme + signature []byte +} + +func (m *certificateVerifyMsg) marshal() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint8(typeCertificateVerify) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + if m.hasSignatureAlgorithm { + b.AddUint16(uint16(m.signatureAlgorithm)) + } + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.signature) + }) + }) + + return b.Bytes() +} + +func (m *certificateVerifyMsg) unmarshal(data []byte) bool { + s := cryptobyte.String(data) + + if !s.Skip(4) { // message type and uint24 length field + return false + } + if m.hasSignatureAlgorithm { + if !s.ReadUint16((*uint16)(&m.signatureAlgorithm)) { + return false + } + } + return readUint16LengthPrefixed(&s, &m.signature) && s.Empty() +} + +type newSessionTicketMsg struct { + ticket []byte +} + +func (m *newSessionTicketMsg) marshal() ([]byte, error) { + // See RFC 5077, Section 3.3. + ticketLen := len(m.ticket) + length := 2 + 4 + ticketLen + x := make([]byte, 4+length) + x[0] = typeNewSessionTicket + x[1] = uint8(length >> 16) + x[2] = uint8(length >> 8) + x[3] = uint8(length) + x[8] = uint8(ticketLen >> 8) + x[9] = uint8(ticketLen) + copy(x[10:], m.ticket) + + return x, nil +} + +func (m *newSessionTicketMsg) unmarshal(data []byte) bool { + if len(data) < 10 { + return false + } + + length := uint32(data[1])<<16 | uint32(data[2])<<8 | uint32(data[3]) + if uint32(len(data))-4 != length { + return false + } + + ticketLen := int(data[8])<<8 + int(data[9]) + if len(data)-10 != ticketLen { + return false + } + + m.ticket = data[10:] + + return true +} + +type helloRequestMsg struct { +} + +func (*helloRequestMsg) marshal() ([]byte, error) { + return []byte{typeHelloRequest, 0, 0, 0}, nil +} + +func (*helloRequestMsg) unmarshal(data []byte) bool { + return len(data) == 4 +} + +type transcriptHash interface { + Write([]byte) (int, error) +} + +// transcriptMsg is a helper used to hash messages which are not hashed when +// they are read from, or written to, the wire. This is typically the case for +// messages which are either not sent, or need to be hashed out of order from +// when they are read/written. +// +// For most messages, the message is marshalled using their marshal method, +// since their wire representation is idempotent. For clientHelloMsg and +// serverHelloMsg, we store the original wire representation of the message and +// use that for hashing, since unmarshal/marshal are not idempotent due to +// extension ordering and other malleable fields, which may cause differences +// between what was received and what we marshal. +func transcriptMsg(msg handshakeMessage, h transcriptHash) error { + if msgWithOrig, ok := msg.(handshakeMessageWithOriginalBytes); ok { + if orig := msgWithOrig.originalBytes(); orig != nil { + h.Write(msgWithOrig.originalBytes()) + return nil + } + } + + data, err := msg.marshal() + if err != nil { + return err + } + h.Write(data) + return nil +} diff --git a/backend/vendor/github.com/refraction-networking/utls/handshake_server.go b/backend/vendor/github.com/refraction-networking/utls/handshake_server.go new file mode 100644 index 0000000..70ba714 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/handshake_server.go @@ -0,0 +1,1011 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "context" + "crypto" + "crypto/ecdsa" + "crypto/ed25519" + "crypto/rsa" + "crypto/subtle" + "crypto/x509" + "errors" + "fmt" + "hash" + "io" + "time" + + "github.com/refraction-networking/utls/internal/byteorder" + + circlSign "github.com/cloudflare/circl/sign" +) + +// serverHandshakeState contains details of a server handshake in progress. +// It's discarded once the handshake has completed. +type serverHandshakeState struct { + c *Conn + ctx context.Context + clientHello *clientHelloMsg + hello *serverHelloMsg + suite *cipherSuite + ecdheOk bool + ecSignOk bool + rsaDecryptOk bool + rsaSignOk bool + sessionState *SessionState + finishedHash finishedHash + masterSecret []byte + cert *Certificate +} + +// serverHandshake performs a TLS handshake as a server. +func (c *Conn) serverHandshake(ctx context.Context) error { + clientHello, ech, err := c.readClientHello(ctx) + if err != nil { + return err + } + + if c.vers == VersionTLS13 { + hs := serverHandshakeStateTLS13{ + c: c, + ctx: ctx, + clientHello: clientHello, + echContext: ech, + } + return hs.handshake() + } + + hs := serverHandshakeState{ + c: c, + ctx: ctx, + clientHello: clientHello, + } + return hs.handshake() +} + +func (hs *serverHandshakeState) handshake() error { + c := hs.c + + if err := hs.processClientHello(); err != nil { + return err + } + + // For an overview of TLS handshaking, see RFC 5246, Section 7.3. + c.buffering = true + if err := hs.checkForResumption(); err != nil { + return err + } + if hs.sessionState != nil { + // The client has included a session ticket and so we do an abbreviated handshake. + c.didResume = true + if err := hs.doResumeHandshake(); err != nil { + return err + } + if err := hs.establishKeys(); err != nil { + return err + } + if err := hs.sendSessionTicket(); err != nil { + return err + } + if err := hs.sendFinished(c.serverFinished[:]); err != nil { + return err + } + if _, err := c.flush(); err != nil { + return err + } + c.clientFinishedIsFirst = false + if err := hs.readFinished(nil); err != nil { + return err + } + } else { + // The client didn't include a session ticket, or it wasn't + // valid so we do a full handshake. + if err := hs.pickCipherSuite(); err != nil { + return err + } + if err := hs.doFullHandshake(); err != nil { + return err + } + if err := hs.establishKeys(); err != nil { + return err + } + if err := hs.readFinished(c.clientFinished[:]); err != nil { + return err + } + c.clientFinishedIsFirst = true + c.buffering = true + if err := hs.sendSessionTicket(); err != nil { + return err + } + if err := hs.sendFinished(nil); err != nil { + return err + } + if _, err := c.flush(); err != nil { + return err + } + } + + c.ekm = ekmFromMasterSecret(c.vers, hs.suite, hs.masterSecret, hs.clientHello.random, hs.hello.random) + c.isHandshakeComplete.Store(true) + + return nil +} + +// readClientHello reads a ClientHello message and selects the protocol version. +func (c *Conn) readClientHello(ctx context.Context) (*clientHelloMsg, *echServerContext, error) { + // clientHelloMsg is included in the transcript, but we haven't initialized + // it yet. The respective handshake functions will record it themselves. + msg, err := c.readHandshake(nil) + if err != nil { + return nil, nil, err + } + clientHello, ok := msg.(*clientHelloMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return nil, nil, unexpectedMessageError(clientHello, msg) + } + + // ECH processing has to be done before we do any other negotiation based on + // the contents of the client hello, since we may swap it out completely. + var ech *echServerContext + if len(clientHello.encryptedClientHello) != 0 { + clientHello, ech, err = c.processECHClientHello(clientHello) + if err != nil { + return nil, nil, err + } + } + + var configForClient *Config + originalConfig := c.config + if c.config.GetConfigForClient != nil { + chi := clientHelloInfo(ctx, c, clientHello) + if configForClient, err = c.config.GetConfigForClient(chi); err != nil { + c.sendAlert(alertInternalError) + return nil, nil, err + } else if configForClient != nil { + c.config = configForClient + } + } + c.ticketKeys = originalConfig.ticketKeys(configForClient) + + clientVersions := clientHello.supportedVersions + if len(clientHello.supportedVersions) == 0 { + clientVersions = supportedVersionsFromMax(clientHello.vers) + } + c.vers, ok = c.config.mutualVersion(roleServer, clientVersions) + if !ok { + c.sendAlert(alertProtocolVersion) + return nil, nil, fmt.Errorf("tls: client offered only unsupported versions: %x", clientVersions) + } + c.haveVers = true + c.in.version = c.vers + c.out.version = c.vers + + // This check reflects some odd specification implied behavior. Client-facing servers + // are supposed to reject hellos with outer ECH and inner ECH that offers 1.2, but + // backend servers are allowed to accept hellos with inner ECH that offer 1.2, since + // they cannot expect client-facing servers to behave properly. Since we act as both + // a client-facing and backend server, we only enforce 1.3 being negotiated if we + // saw a hello with outer ECH first. The spec probably should've made this an error, + // but it didn't, and this matches the boringssl behavior. + if c.vers != VersionTLS13 && (ech != nil && !ech.inner) { + c.sendAlert(alertIllegalParameter) + return nil, nil, errors.New("tls: Encrypted Client Hello cannot be used pre-TLS 1.3") + } + + // [UTLS SECTION BEGIN] + // Disable unsupported godebug package + // if c.config.MinVersion == 0 && c.vers < VersionTLS12 { + // tls10server.Value() // ensure godebug is initialized + // tls10server.IncNonDefault() + // } + // [UTLS SECTION END] + + return clientHello, ech, nil +} + +func (hs *serverHandshakeState) processClientHello() error { + c := hs.c + + hs.hello = new(serverHelloMsg) + hs.hello.vers = c.vers + + foundCompression := false + // We only support null compression, so check that the client offered it. + for _, compression := range hs.clientHello.compressionMethods { + if compression == compressionNone { + foundCompression = true + break + } + } + + if !foundCompression { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: client does not support uncompressed connections") + } + + hs.hello.random = make([]byte, 32) + serverRandom := hs.hello.random + // Downgrade protection canaries. See RFC 8446, Section 4.1.3. + maxVers := c.config.maxSupportedVersion(roleServer) + if maxVers >= VersionTLS12 && c.vers < maxVers || testingOnlyForceDowngradeCanary { + if c.vers == VersionTLS12 { + copy(serverRandom[24:], downgradeCanaryTLS12) + } else { + copy(serverRandom[24:], downgradeCanaryTLS11) + } + serverRandom = serverRandom[:24] + } + _, err := io.ReadFull(c.config.rand(), serverRandom) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + + if len(hs.clientHello.secureRenegotiation) != 0 { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: initial handshake had non-empty renegotiation extension") + } + + hs.hello.extendedMasterSecret = hs.clientHello.extendedMasterSecret + hs.hello.secureRenegotiationSupported = hs.clientHello.secureRenegotiationSupported + hs.hello.compressionMethod = compressionNone + if len(hs.clientHello.serverName) > 0 { + c.serverName = hs.clientHello.serverName + } + + selectedProto, err := negotiateALPN(c.config.NextProtos, hs.clientHello.alpnProtocols, false) + if err != nil { + c.sendAlert(alertNoApplicationProtocol) + return err + } + hs.hello.alpnProtocol = selectedProto + c.clientProtocol = selectedProto + + hs.cert, err = c.config.getCertificate(clientHelloInfo(hs.ctx, c, hs.clientHello)) + if err != nil { + if err == errNoCertificates { + c.sendAlert(alertUnrecognizedName) + } else { + c.sendAlert(alertInternalError) + } + return err + } + if hs.clientHello.scts { + hs.hello.scts = hs.cert.SignedCertificateTimestamps + } + + hs.ecdheOk = supportsECDHE(c.config, c.vers, hs.clientHello.supportedCurves, hs.clientHello.supportedPoints) + + if hs.ecdheOk && len(hs.clientHello.supportedPoints) > 0 { + // Although omitting the ec_point_formats extension is permitted, some + // old OpenSSL version will refuse to handshake if not present. + // + // Per RFC 4492, section 5.1.2, implementations MUST support the + // uncompressed point format. See golang.org/issue/31943. + hs.hello.supportedPoints = []uint8{pointFormatUncompressed} + } + + if priv, ok := hs.cert.PrivateKey.(crypto.Signer); ok { + switch priv.Public().(type) { + case *ecdsa.PublicKey: + hs.ecSignOk = true + case ed25519.PublicKey: + hs.ecSignOk = true + case *rsa.PublicKey: + hs.rsaSignOk = true + default: + c.sendAlert(alertInternalError) + return fmt.Errorf("tls: unsupported signing key type (%T)", priv.Public()) + } + } + if priv, ok := hs.cert.PrivateKey.(crypto.Decrypter); ok { + switch priv.Public().(type) { + case *rsa.PublicKey: + hs.rsaDecryptOk = true + default: + c.sendAlert(alertInternalError) + return fmt.Errorf("tls: unsupported decryption key type (%T)", priv.Public()) + } + } + + return nil +} + +// negotiateALPN picks a shared ALPN protocol that both sides support in server +// preference order. If ALPN is not configured or the peer doesn't support it, +// it returns "" and no error. +func negotiateALPN(serverProtos, clientProtos []string, quic bool) (string, error) { + if len(serverProtos) == 0 || len(clientProtos) == 0 { + if quic && len(serverProtos) != 0 { + // RFC 9001, Section 8.1 + return "", fmt.Errorf("tls: client did not request an application protocol") + } + return "", nil + } + var http11fallback bool + for _, s := range serverProtos { + for _, c := range clientProtos { + if s == c { + return s, nil + } + if s == "h2" && c == "http/1.1" { + http11fallback = true + } + } + } + // As a special case, let http/1.1 clients connect to h2 servers as if they + // didn't support ALPN. We used not to enforce protocol overlap, so over + // time a number of HTTP servers were configured with only "h2", but + // expected to accept connections from "http/1.1" clients. See Issue 46310. + if http11fallback { + return "", nil + } + return "", fmt.Errorf("tls: client requested unsupported application protocols (%s)", clientProtos) +} + +// supportsECDHE returns whether ECDHE key exchanges can be used with this +// pre-TLS 1.3 client. +func supportsECDHE(c *Config, version uint16, supportedCurves []CurveID, supportedPoints []uint8) bool { + supportsCurve := false + for _, curve := range supportedCurves { + if c.supportsCurve(version, curve) { + supportsCurve = true + break + } + } + + supportsPointFormat := false + for _, pointFormat := range supportedPoints { + if pointFormat == pointFormatUncompressed { + supportsPointFormat = true + break + } + } + // Per RFC 8422, Section 5.1.2, if the Supported Point Formats extension is + // missing, uncompressed points are supported. If supportedPoints is empty, + // the extension must be missing, as an empty extension body is rejected by + // the parser. See https://go.dev/issue/49126. + if len(supportedPoints) == 0 { + supportsPointFormat = true + } + + return supportsCurve && supportsPointFormat +} + +func (hs *serverHandshakeState) pickCipherSuite() error { + c := hs.c + + preferenceOrder := cipherSuitesPreferenceOrder + if !hasAESGCMHardwareSupport || !aesgcmPreferred(hs.clientHello.cipherSuites) { + preferenceOrder = cipherSuitesPreferenceOrderNoAES + } + + configCipherSuites := c.config.cipherSuites() + preferenceList := make([]uint16, 0, len(configCipherSuites)) + for _, suiteID := range preferenceOrder { + for _, id := range configCipherSuites { + if id == suiteID { + preferenceList = append(preferenceList, id) + break + } + } + } + + hs.suite = selectCipherSuite(preferenceList, hs.clientHello.cipherSuites, hs.cipherSuiteOk) + if hs.suite == nil { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: no cipher suite supported by both client and server") + } + c.cipherSuite = hs.suite.id + + // [UTLS SECTION BEGIN] + // Disable unsupported godebug package + // if c.config.CipherSuites == nil && !fips140tls.Required() && rsaKexCiphers[hs.suite.id] { + // tlsrsakex.Value() // ensure godebug is initialized + // tlsrsakex.IncNonDefault() + // } + // if c.config.CipherSuites == nil && !fips140tls.Required() && tdesCiphers[hs.suite.id] { + // tls3des.Value() // ensure godebug is initialized + // tls3des.IncNonDefault() + // } + // [UTLS SECTION END] + + for _, id := range hs.clientHello.cipherSuites { + if id == TLS_FALLBACK_SCSV { + // The client is doing a fallback connection. See RFC 7507. + if hs.clientHello.vers < c.config.maxSupportedVersion(roleServer) { + c.sendAlert(alertInappropriateFallback) + return errors.New("tls: client using inappropriate protocol fallback") + } + break + } + } + + return nil +} + +func (hs *serverHandshakeState) cipherSuiteOk(c *cipherSuite) bool { + if c.flags&suiteECDHE != 0 { + if !hs.ecdheOk { + return false + } + if c.flags&suiteECSign != 0 { + if !hs.ecSignOk { + return false + } + } else if !hs.rsaSignOk { + return false + } + } else if !hs.rsaDecryptOk { + return false + } + if hs.c.vers < VersionTLS12 && c.flags&suiteTLS12 != 0 { + return false + } + return true +} + +// checkForResumption reports whether we should perform resumption on this connection. +func (hs *serverHandshakeState) checkForResumption() error { + c := hs.c + + if c.config.SessionTicketsDisabled { + return nil + } + + var sessionState *SessionState + if c.config.UnwrapSession != nil { + ss, err := c.config.UnwrapSession(hs.clientHello.sessionTicket, c.connectionStateLocked()) + if err != nil { + return err + } + if ss == nil { + return nil + } + sessionState = ss + } else { + plaintext := c.config.decryptTicket(hs.clientHello.sessionTicket, c.ticketKeys) + if plaintext == nil { + return nil + } + ss, err := ParseSessionState(plaintext) + if err != nil { + return nil + } + sessionState = ss + } + + // TLS 1.2 tickets don't natively have a lifetime, but we want to avoid + // re-wrapping the same master secret in different tickets over and over for + // too long, weakening forward secrecy. + createdAt := time.Unix(int64(sessionState.createdAt), 0) + if c.config.time().Sub(createdAt) > maxSessionTicketLifetime { + return nil + } + + // Never resume a session for a different TLS version. + if c.vers != sessionState.version { + return nil + } + + cipherSuiteOk := false + // Check that the client is still offering the ciphersuite in the session. + for _, id := range hs.clientHello.cipherSuites { + if id == sessionState.cipherSuite { + cipherSuiteOk = true + break + } + } + if !cipherSuiteOk { + return nil + } + + // Check that we also support the ciphersuite from the session. + suite := selectCipherSuite([]uint16{sessionState.cipherSuite}, + c.config.cipherSuites(), hs.cipherSuiteOk) + if suite == nil { + return nil + } + + sessionHasClientCerts := len(sessionState.peerCertificates) != 0 + needClientCerts := requiresClientCert(c.config.ClientAuth) + if needClientCerts && !sessionHasClientCerts { + return nil + } + if sessionHasClientCerts && c.config.ClientAuth == NoClientCert { + return nil + } + if sessionHasClientCerts && c.config.time().After(sessionState.peerCertificates[0].NotAfter) { + return nil + } + if sessionHasClientCerts && c.config.ClientAuth >= VerifyClientCertIfGiven && + len(sessionState.verifiedChains) == 0 { + return nil + } + + // RFC 7627, Section 5.3 + if !sessionState.extMasterSecret && hs.clientHello.extendedMasterSecret { + return nil + } + if sessionState.extMasterSecret && !hs.clientHello.extendedMasterSecret { + // Aborting is somewhat harsh, but it's a MUST and it would indicate a + // weird downgrade in client capabilities. + return errors.New("tls: session supported extended_master_secret but client does not") + } + + c.peerCertificates = sessionState.peerCertificates + c.ocspResponse = sessionState.ocspResponse + c.scts = sessionState.scts + c.verifiedChains = sessionState.verifiedChains + c.extMasterSecret = sessionState.extMasterSecret + hs.sessionState = sessionState + hs.suite = suite + c.didResume = true + return nil +} + +func (hs *serverHandshakeState) doResumeHandshake() error { + c := hs.c + + hs.hello.cipherSuite = hs.suite.id + c.cipherSuite = hs.suite.id + // We echo the client's session ID in the ServerHello to let it know + // that we're doing a resumption. + hs.hello.sessionId = hs.clientHello.sessionId + // We always send a new session ticket, even if it wraps the same master + // secret and it's potentially encrypted with the same key, to help the + // client avoid cross-connection tracking from a network observer. + hs.hello.ticketSupported = true + hs.finishedHash = newFinishedHash(c.vers, hs.suite) + hs.finishedHash.discardHandshakeBuffer() + if err := transcriptMsg(hs.clientHello, &hs.finishedHash); err != nil { + return err + } + if _, err := hs.c.writeHandshakeRecord(hs.hello, &hs.finishedHash); err != nil { + return err + } + + if c.config.VerifyConnection != nil { + if err := c.config.VerifyConnection(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + + hs.masterSecret = hs.sessionState.secret + + return nil +} + +func (hs *serverHandshakeState) doFullHandshake() error { + c := hs.c + + if hs.clientHello.ocspStapling && len(hs.cert.OCSPStaple) > 0 { + hs.hello.ocspStapling = true + } + + hs.hello.ticketSupported = hs.clientHello.ticketSupported && !c.config.SessionTicketsDisabled + hs.hello.cipherSuite = hs.suite.id + + hs.finishedHash = newFinishedHash(hs.c.vers, hs.suite) + if c.config.ClientAuth == NoClientCert { + // No need to keep a full record of the handshake if client + // certificates won't be used. + hs.finishedHash.discardHandshakeBuffer() + } + if err := transcriptMsg(hs.clientHello, &hs.finishedHash); err != nil { + return err + } + if _, err := hs.c.writeHandshakeRecord(hs.hello, &hs.finishedHash); err != nil { + return err + } + + certMsg := new(certificateMsg) + certMsg.certificates = hs.cert.Certificate + if _, err := hs.c.writeHandshakeRecord(certMsg, &hs.finishedHash); err != nil { + return err + } + + if hs.hello.ocspStapling { + certStatus := new(certificateStatusMsg) + certStatus.response = hs.cert.OCSPStaple + if _, err := hs.c.writeHandshakeRecord(certStatus, &hs.finishedHash); err != nil { + return err + } + } + + keyAgreement := hs.suite.ka(c.vers) + skx, err := keyAgreement.generateServerKeyExchange(c.config, hs.cert, hs.clientHello, hs.hello) + if err != nil { + c.sendAlert(alertHandshakeFailure) + return err + } + if skx != nil { + if len(skx.key) >= 3 && skx.key[0] == 3 /* named curve */ { + c.curveID = CurveID(byteorder.BEUint16(skx.key[1:])) + } + if _, err := hs.c.writeHandshakeRecord(skx, &hs.finishedHash); err != nil { + return err + } + } + + var certReq *certificateRequestMsg + if c.config.ClientAuth >= RequestClientCert { + // Request a client certificate + certReq = new(certificateRequestMsg) + certReq.certificateTypes = []byte{ + byte(certTypeRSASign), + byte(certTypeECDSASign), + } + if c.vers >= VersionTLS12 { + certReq.hasSignatureAlgorithm = true + certReq.supportedSignatureAlgorithms = c.config.supportedSignatureAlgorithms() // [UTLS] ported from cloudflare/go + } + + // An empty list of certificateAuthorities signals to + // the client that it may send any certificate in response + // to our request. When we know the CAs we trust, then + // we can send them down, so that the client can choose + // an appropriate certificate to give to us. + if c.config.ClientCAs != nil { + certReq.certificateAuthorities = c.config.ClientCAs.Subjects() + } + if _, err := hs.c.writeHandshakeRecord(certReq, &hs.finishedHash); err != nil { + return err + } + } + + helloDone := new(serverHelloDoneMsg) + if _, err := hs.c.writeHandshakeRecord(helloDone, &hs.finishedHash); err != nil { + return err + } + + if _, err := c.flush(); err != nil { + return err + } + + var pub crypto.PublicKey // public key for client auth, if any + + msg, err := c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + + // If we requested a client certificate, then the client must send a + // certificate message, even if it's empty. + if c.config.ClientAuth >= RequestClientCert { + certMsg, ok := msg.(*certificateMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(certMsg, msg) + } + + if err := c.processCertsFromClient(Certificate{ + Certificate: certMsg.certificates, + }); err != nil { + return err + } + if len(certMsg.certificates) != 0 { + pub = c.peerCertificates[0].PublicKey + } + + msg, err = c.readHandshake(&hs.finishedHash) + if err != nil { + return err + } + } + if c.config.VerifyConnection != nil { + if err := c.config.VerifyConnection(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + + // Get client key exchange + ckx, ok := msg.(*clientKeyExchangeMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(ckx, msg) + } + + preMasterSecret, err := keyAgreement.processClientKeyExchange(c.config, hs.cert, ckx, c.vers) + if err != nil { + c.sendAlert(alertIllegalParameter) + return err + } + if hs.hello.extendedMasterSecret { + c.extMasterSecret = true + hs.masterSecret = extMasterFromPreMasterSecret(c.vers, hs.suite, preMasterSecret, + hs.finishedHash.Sum()) + } else { + hs.masterSecret = masterFromPreMasterSecret(c.vers, hs.suite, preMasterSecret, + hs.clientHello.random, hs.hello.random) + } + if err := c.config.writeKeyLog(keyLogLabelTLS12, hs.clientHello.random, hs.masterSecret); err != nil { + c.sendAlert(alertInternalError) + return err + } + + // If we received a client cert in response to our certificate request message, + // the client will send us a certificateVerifyMsg immediately after the + // clientKeyExchangeMsg. This message is a digest of all preceding + // handshake-layer messages that is signed using the private key corresponding + // to the client's certificate. This allows us to verify that the client is in + // possession of the private key of the certificate. + if len(c.peerCertificates) > 0 { + // certificateVerifyMsg is included in the transcript, but not until + // after we verify the handshake signature, since the state before + // this message was sent is used. + msg, err = c.readHandshake(nil) + if err != nil { + return err + } + certVerify, ok := msg.(*certificateVerifyMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(certVerify, msg) + } + + var sigType uint8 + var sigHash crypto.Hash + if c.vers >= VersionTLS12 { + if !isSupportedSignatureAlgorithm(certVerify.signatureAlgorithm, certReq.supportedSignatureAlgorithms) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: client certificate used with invalid signature algorithm") + } + sigType, sigHash, err = typeAndHashFromSignatureScheme(certVerify.signatureAlgorithm) + if err != nil { + return c.sendAlert(alertInternalError) + } + } else { + sigType, sigHash, err = legacyTypeAndHashFromPublicKey(pub) + if err != nil { + c.sendAlert(alertIllegalParameter) + return err + } + } + + signed := hs.finishedHash.hashForClientCertificate(sigType, sigHash) + if err := verifyHandshakeSignature(sigType, pub, sigHash, signed, certVerify.signature); err != nil { + c.sendAlert(alertDecryptError) + return errors.New("tls: invalid signature by the client certificate: " + err.Error()) + } + + if err := transcriptMsg(certVerify, &hs.finishedHash); err != nil { + return err + } + } + + hs.finishedHash.discardHandshakeBuffer() + + return nil +} + +func (hs *serverHandshakeState) establishKeys() error { + c := hs.c + + clientMAC, serverMAC, clientKey, serverKey, clientIV, serverIV := + keysFromMasterSecret(c.vers, hs.suite, hs.masterSecret, hs.clientHello.random, hs.hello.random, hs.suite.macLen, hs.suite.keyLen, hs.suite.ivLen) + + var clientCipher, serverCipher any + var clientHash, serverHash hash.Hash + + if hs.suite.aead == nil { + clientCipher = hs.suite.cipher(clientKey, clientIV, true /* for reading */) + clientHash = hs.suite.mac(clientMAC) + serverCipher = hs.suite.cipher(serverKey, serverIV, false /* not for reading */) + serverHash = hs.suite.mac(serverMAC) + } else { + clientCipher = hs.suite.aead(clientKey, clientIV) + serverCipher = hs.suite.aead(serverKey, serverIV) + } + + c.in.prepareCipherSpec(c.vers, clientCipher, clientHash) + c.out.prepareCipherSpec(c.vers, serverCipher, serverHash) + + return nil +} + +func (hs *serverHandshakeState) readFinished(out []byte) error { + c := hs.c + + if err := c.readChangeCipherSpec(); err != nil { + return err + } + + // finishedMsg is included in the transcript, but not until after we + // check the client version, since the state before this message was + // sent is used during verification. + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + clientFinished, ok := msg.(*finishedMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(clientFinished, msg) + } + + verify := hs.finishedHash.clientSum(hs.masterSecret) + if len(verify) != len(clientFinished.verifyData) || + subtle.ConstantTimeCompare(verify, clientFinished.verifyData) != 1 { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: client's Finished message is incorrect") + } + + if err := transcriptMsg(clientFinished, &hs.finishedHash); err != nil { + return err + } + + copy(out, verify) + return nil +} + +func (hs *serverHandshakeState) sendSessionTicket() error { + // ticketSupported is set in a resumption handshake if the + // ticket from the client was encrypted with an old session + // ticket key and thus a refreshed ticket should be sent. + if !hs.hello.ticketSupported { + return nil + } + + c := hs.c + m := new(newSessionTicketMsg) + + state := c.sessionState() + state.secret = hs.masterSecret + if hs.sessionState != nil { + // If this is re-wrapping an old key, then keep + // the original time it was created. + state.createdAt = hs.sessionState.createdAt + } + if c.config.WrapSession != nil { + var err error + m.ticket, err = c.config.WrapSession(c.connectionStateLocked(), state) + if err != nil { + return err + } + } else { + stateBytes, err := state.Bytes() + if err != nil { + return err + } + m.ticket, err = c.config.encryptTicket(stateBytes, c.ticketKeys) + if err != nil { + return err + } + } + + if _, err := hs.c.writeHandshakeRecord(m, &hs.finishedHash); err != nil { + return err + } + + return nil +} + +func (hs *serverHandshakeState) sendFinished(out []byte) error { + c := hs.c + + if err := c.writeChangeCipherRecord(); err != nil { + return err + } + + finished := new(finishedMsg) + finished.verifyData = hs.finishedHash.serverSum(hs.masterSecret) + if _, err := hs.c.writeHandshakeRecord(finished, &hs.finishedHash); err != nil { + return err + } + + copy(out, finished.verifyData) + + return nil +} + +// processCertsFromClient takes a chain of client certificates either from a +// Certificates message and verifies them. +func (c *Conn) processCertsFromClient(certificate Certificate) error { + certificates := certificate.Certificate + certs := make([]*x509.Certificate, len(certificates)) + var err error + for i, asn1Data := range certificates { + if certs[i], err = x509.ParseCertificate(asn1Data); err != nil { + c.sendAlert(alertBadCertificate) + return errors.New("tls: failed to parse client certificate: " + err.Error()) + } + if certs[i].PublicKeyAlgorithm == x509.RSA { + n := certs[i].PublicKey.(*rsa.PublicKey).N.BitLen() + if max, ok := checkKeySize(n); !ok { + c.sendAlert(alertBadCertificate) + return fmt.Errorf("tls: client sent certificate containing RSA key larger than %d bits", max) + } + } + } + + if len(certs) == 0 && requiresClientCert(c.config.ClientAuth) { + if c.vers == VersionTLS13 { + c.sendAlert(alertCertificateRequired) + } else { + c.sendAlert(alertBadCertificate) + } + return errors.New("tls: client didn't provide a certificate") + } + + if c.config.ClientAuth >= VerifyClientCertIfGiven && len(certs) > 0 { + opts := x509.VerifyOptions{ + Roots: c.config.ClientCAs, + CurrentTime: c.config.time(), + Intermediates: x509.NewCertPool(), + KeyUsages: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth}, + } + + for _, cert := range certs[1:] { + opts.Intermediates.AddCert(cert) + } + + chains, err := certs[0].Verify(opts) + if err != nil { + var errCertificateInvalid x509.CertificateInvalidError + if errors.As(err, &x509.UnknownAuthorityError{}) { + c.sendAlert(alertUnknownCA) + } else if errors.As(err, &errCertificateInvalid) && errCertificateInvalid.Reason == x509.Expired { + c.sendAlert(alertCertificateExpired) + } else { + c.sendAlert(alertBadCertificate) + } + return &CertificateVerificationError{UnverifiedCertificates: certs, Err: err} + } + + c.verifiedChains, err = fipsAllowedChains(chains) + if err != nil { + c.sendAlert(alertBadCertificate) + return &CertificateVerificationError{UnverifiedCertificates: certs, Err: err} + } + } + + c.peerCertificates = certs + c.ocspResponse = certificate.OCSPStaple + c.scts = certificate.SignedCertificateTimestamps + + if len(certs) > 0 { + switch certs[0].PublicKey.(type) { + case *ecdsa.PublicKey, *rsa.PublicKey, ed25519.PublicKey, circlSign.PublicKey: // [UTLS] ported from cloudflare/go + default: + c.sendAlert(alertUnsupportedCertificate) + return fmt.Errorf("tls: client certificate contains an unsupported public key of type %T", certs[0].PublicKey) + } + } + + if c.config.VerifyPeerCertificate != nil { + if err := c.config.VerifyPeerCertificate(certificates, c.verifiedChains); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + + return nil +} + +func clientHelloInfo(ctx context.Context, c *Conn, clientHello *clientHelloMsg) *ClientHelloInfo { + supportedVersions := clientHello.supportedVersions + if len(clientHello.supportedVersions) == 0 { + supportedVersions = supportedVersionsFromMax(clientHello.vers) + } + + return &ClientHelloInfo{ + CipherSuites: clientHello.cipherSuites, + ServerName: clientHello.serverName, + SupportedCurves: clientHello.supportedCurves, + SupportedPoints: clientHello.supportedPoints, + SignatureSchemes: clientHello.supportedSignatureAlgorithms, + SupportedProtos: clientHello.alpnProtocols, + SupportedVersions: supportedVersions, + Extensions: clientHello.extensions, + Conn: c.conn, + config: c.config, + ctx: ctx, + } +} diff --git a/backend/vendor/github.com/refraction-networking/utls/handshake_server_tls13.go b/backend/vendor/github.com/refraction-networking/utls/handshake_server_tls13.go new file mode 100644 index 0000000..b05f142 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/handshake_server_tls13.go @@ -0,0 +1,1148 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bytes" + "context" + "crypto" + "crypto/hmac" + "crypto/mlkem" + "crypto/rsa" + "errors" + "hash" + "io" + "slices" + "sort" + "time" + + "github.com/refraction-networking/utls/internal/byteorder" + "github.com/refraction-networking/utls/internal/fips140tls" + "github.com/refraction-networking/utls/internal/hkdf" + "github.com/refraction-networking/utls/internal/hpke" + "github.com/refraction-networking/utls/internal/tls13" +) + +// maxClientPSKIdentities is the number of client PSK identities the server will +// attempt to validate. It will ignore the rest not to let cheap ClientHello +// messages cause too much work in session ticket decryption attempts. +const maxClientPSKIdentities = 5 + +type echServerContext struct { + hpkeContext *hpke.Receipient + configID uint8 + ciphersuite echCipher + transcript hash.Hash + // inner indicates that the initial client_hello we recieved contained an + // encrypted_client_hello extension that indicated it was an "inner" hello. + // We don't do any additional processing of the hello in this case, so all + // fields above are unset. + inner bool +} + +type serverHandshakeStateTLS13 struct { + c *Conn + ctx context.Context + clientHello *clientHelloMsg + hello *serverHelloMsg + sentDummyCCS bool + usingPSK bool + earlyData bool + suite *cipherSuiteTLS13 + cert *Certificate + sigAlg SignatureScheme + earlySecret *tls13.EarlySecret + sharedKey []byte + handshakeSecret *tls13.HandshakeSecret + masterSecret *tls13.MasterSecret + trafficSecret []byte // client_application_traffic_secret_0 + transcript hash.Hash + clientFinished []byte + echContext *echServerContext +} + +func (hs *serverHandshakeStateTLS13) handshake() error { + c := hs.c + + // For an overview of the TLS 1.3 handshake, see RFC 8446, Section 2. + if err := hs.processClientHello(); err != nil { + return err + } + if err := hs.checkForResumption(); err != nil { + return err + } + if err := hs.pickCertificate(); err != nil { + return err + } + c.buffering = true + if err := hs.sendServerParameters(); err != nil { + return err + } + if err := hs.sendServerCertificate(); err != nil { + return err + } + if err := hs.sendServerFinished(); err != nil { + return err + } + // Note that at this point we could start sending application data without + // waiting for the client's second flight, but the application might not + // expect the lack of replay protection of the ClientHello parameters. + if _, err := c.flush(); err != nil { + return err + } + if err := hs.readClientCertificate(); err != nil { + return err + } + if err := hs.readClientFinished(); err != nil { + return err + } + + c.isHandshakeComplete.Store(true) + + return nil +} + +func (hs *serverHandshakeStateTLS13) processClientHello() error { + c := hs.c + + hs.hello = new(serverHelloMsg) + + // TLS 1.3 froze the ServerHello.legacy_version field, and uses + // supported_versions instead. See RFC 8446, sections 4.1.3 and 4.2.1. + hs.hello.vers = VersionTLS12 + hs.hello.supportedVersion = c.vers + + if len(hs.clientHello.supportedVersions) == 0 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: client used the legacy version field to negotiate TLS 1.3") + } + + // Abort if the client is doing a fallback and landing lower than what we + // support. See RFC 7507, which however does not specify the interaction + // with supported_versions. The only difference is that with + // supported_versions a client has a chance to attempt a [TLS 1.2, TLS 1.4] + // handshake in case TLS 1.3 is broken but 1.2 is not. Alas, in that case, + // it will have to drop the TLS_FALLBACK_SCSV protection if it falls back to + // TLS 1.2, because a TLS 1.3 server would abort here. The situation before + // supported_versions was not better because there was just no way to do a + // TLS 1.4 handshake without risking the server selecting TLS 1.3. + for _, id := range hs.clientHello.cipherSuites { + if id == TLS_FALLBACK_SCSV { + // Use c.vers instead of max(supported_versions) because an attacker + // could defeat this by adding an arbitrary high version otherwise. + if c.vers < c.config.maxSupportedVersion(roleServer) { + c.sendAlert(alertInappropriateFallback) + return errors.New("tls: client using inappropriate protocol fallback") + } + break + } + } + + if len(hs.clientHello.compressionMethods) != 1 || + hs.clientHello.compressionMethods[0] != compressionNone { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: TLS 1.3 client supports illegal compression methods") + } + + hs.hello.random = make([]byte, 32) + if _, err := io.ReadFull(c.config.rand(), hs.hello.random); err != nil { + c.sendAlert(alertInternalError) + return err + } + + if len(hs.clientHello.secureRenegotiation) != 0 { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: initial handshake had non-empty renegotiation extension") + } + + if hs.clientHello.earlyData && c.quic != nil { + if len(hs.clientHello.pskIdentities) == 0 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: early_data without pre_shared_key") + } + } else if hs.clientHello.earlyData { + // See RFC 8446, Section 4.2.10 for the complicated behavior required + // here. The scenario is that a different server at our address offered + // to accept early data in the past, which we can't handle. For now, all + // 0-RTT enabled session tickets need to expire before a Go server can + // replace a server or join a pool. That's the same requirement that + // applies to mixing or replacing with any TLS 1.2 server. + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: client sent unexpected early data") + } + + hs.hello.sessionId = hs.clientHello.sessionId + hs.hello.compressionMethod = compressionNone + + preferenceList := defaultCipherSuitesTLS13 + if !hasAESGCMHardwareSupport || !aesgcmPreferred(hs.clientHello.cipherSuites) { + preferenceList = defaultCipherSuitesTLS13NoAES + } + if fips140tls.Required() { + preferenceList = defaultCipherSuitesTLS13FIPS + } + for _, suiteID := range preferenceList { + hs.suite = mutualCipherSuiteTLS13(hs.clientHello.cipherSuites, suiteID) + if hs.suite != nil { + break + } + } + if hs.suite == nil { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: no cipher suite supported by both client and server") + } + c.cipherSuite = hs.suite.id + hs.hello.cipherSuite = hs.suite.id + hs.transcript = hs.suite.hash.New() + + // First, if a post-quantum key exchange is available, use one. See + // draft-ietf-tls-key-share-prediction-01, Section 4 for why this must be + // first. + // + // Second, if the client sent a key share for a group we support, use that, + // to avoid a HelloRetryRequest round-trip. + // + // Finally, pick in our fixed preference order. + preferredGroups := c.config.curvePreferences(c.vers) + preferredGroups = slices.DeleteFunc(preferredGroups, func(group CurveID) bool { + return !slices.Contains(hs.clientHello.supportedCurves, group) + }) + if len(preferredGroups) == 0 { + c.sendAlert(alertHandshakeFailure) + return errors.New("tls: no key exchanges supported by both client and server") + } + hasKeyShare := func(group CurveID) bool { + for _, ks := range hs.clientHello.keyShares { + if ks.group == group { + return true + } + } + return false + } + sort.SliceStable(preferredGroups, func(i, j int) bool { + return hasKeyShare(preferredGroups[i]) && !hasKeyShare(preferredGroups[j]) + }) + sort.SliceStable(preferredGroups, func(i, j int) bool { + return isPQKeyExchange(preferredGroups[i]) && !isPQKeyExchange(preferredGroups[j]) + }) + selectedGroup := preferredGroups[0] + + var clientKeyShare *keyShare + for _, ks := range hs.clientHello.keyShares { + if ks.group == selectedGroup { + clientKeyShare = &ks + break + } + } + if clientKeyShare == nil { + ks, err := hs.doHelloRetryRequest(selectedGroup) + if err != nil { + return err + } + clientKeyShare = ks + } + c.curveID = selectedGroup + + ecdhGroup := selectedGroup + ecdhData := clientKeyShare.data + if selectedGroup == X25519MLKEM768 { + ecdhGroup = X25519 + if len(ecdhData) != mlkem.EncapsulationKeySize768+x25519PublicKeySize { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid X25519MLKEM768 client key share") + } + ecdhData = ecdhData[mlkem.EncapsulationKeySize768:] + } + if _, ok := curveForCurveID(ecdhGroup); !ok { + c.sendAlert(alertInternalError) + return errors.New("tls: CurvePreferences includes unsupported curve") + } + key, err := generateECDHEKey(c.config.rand(), ecdhGroup) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + hs.hello.serverShare = keyShare{group: selectedGroup, data: key.PublicKey().Bytes()} + peerKey, err := key.Curve().NewPublicKey(ecdhData) + if err != nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid client key share") + } + hs.sharedKey, err = key.ECDH(peerKey) + if err != nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid client key share") + } + if selectedGroup == X25519MLKEM768 { + k, err := mlkem.NewEncapsulationKey768(clientKeyShare.data[:mlkem.EncapsulationKeySize768]) + if err != nil { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid X25519MLKEM768 client key share") + } + mlkemSharedSecret, ciphertext := k.Encapsulate() + // draft-kwiatkowski-tls-ecdhe-mlkem-02, Section 3.1.3: "For + // X25519MLKEM768, the shared secret is the concatenation of the ML-KEM + // shared secret and the X25519 shared secret. The shared secret is 64 + // bytes (32 bytes for each part)." + hs.sharedKey = append(mlkemSharedSecret, hs.sharedKey...) + // draft-kwiatkowski-tls-ecdhe-mlkem-02, Section 3.1.2: "When the + // X25519MLKEM768 group is negotiated, the server's key exchange value + // is the concatenation of an ML-KEM ciphertext returned from + // encapsulation to the client's encapsulation key, and the server's + // ephemeral X25519 share." + hs.hello.serverShare.data = append(ciphertext, hs.hello.serverShare.data...) + } + + selectedProto, err := negotiateALPN(c.config.NextProtos, hs.clientHello.alpnProtocols, c.quic != nil) + if err != nil { + c.sendAlert(alertNoApplicationProtocol) + return err + } + c.clientProtocol = selectedProto + + if c.quic != nil { + // RFC 9001 Section 4.2: Clients MUST NOT offer TLS versions older than 1.3. + for _, v := range hs.clientHello.supportedVersions { + if v < VersionTLS13 { + c.sendAlert(alertProtocolVersion) + return errors.New("tls: client offered TLS version older than TLS 1.3") + } + } + // RFC 9001 Section 8.2. + if hs.clientHello.quicTransportParameters == nil { + c.sendAlert(alertMissingExtension) + return errors.New("tls: client did not send a quic_transport_parameters extension") + } + c.quicSetTransportParameters(hs.clientHello.quicTransportParameters) + } else { + if hs.clientHello.quicTransportParameters != nil { + c.sendAlert(alertUnsupportedExtension) + return errors.New("tls: client sent an unexpected quic_transport_parameters extension") + } + } + + c.serverName = hs.clientHello.serverName + return nil +} + +func (hs *serverHandshakeStateTLS13) checkForResumption() error { + c := hs.c + + if c.config.SessionTicketsDisabled { + return nil + } + + modeOK := false + for _, mode := range hs.clientHello.pskModes { + if mode == pskModeDHE { + modeOK = true + break + } + } + if !modeOK { + return nil + } + + if len(hs.clientHello.pskIdentities) != len(hs.clientHello.pskBinders) { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: invalid or missing PSK binders") + } + if len(hs.clientHello.pskIdentities) == 0 { + return nil + } + + for i, identity := range hs.clientHello.pskIdentities { + if i >= maxClientPSKIdentities { + break + } + + var sessionState *SessionState + if c.config.UnwrapSession != nil { + var err error + sessionState, err = c.config.UnwrapSession(identity.label, c.connectionStateLocked()) + if err != nil { + return err + } + if sessionState == nil { + continue + } + } else { + plaintext := c.config.decryptTicket(identity.label, c.ticketKeys) + if plaintext == nil { + continue + } + var err error + sessionState, err = ParseSessionState(plaintext) + if err != nil { + continue + } + } + + if sessionState.version != VersionTLS13 { + continue + } + + createdAt := time.Unix(int64(sessionState.createdAt), 0) + if c.config.time().Sub(createdAt) > maxSessionTicketLifetime { + continue + } + + pskSuite := cipherSuiteTLS13ByID(sessionState.cipherSuite) + if pskSuite == nil || pskSuite.hash != hs.suite.hash { + continue + } + + // PSK connections don't re-establish client certificates, but carry + // them over in the session ticket. Ensure the presence of client certs + // in the ticket is consistent with the configured requirements. + sessionHasClientCerts := len(sessionState.peerCertificates) != 0 + needClientCerts := requiresClientCert(c.config.ClientAuth) + if needClientCerts && !sessionHasClientCerts { + continue + } + if sessionHasClientCerts && c.config.ClientAuth == NoClientCert { + continue + } + if sessionHasClientCerts && c.config.time().After(sessionState.peerCertificates[0].NotAfter) { + continue + } + if sessionHasClientCerts && c.config.ClientAuth >= VerifyClientCertIfGiven && + len(sessionState.verifiedChains) == 0 { + continue + } + + if c.quic != nil && c.quic.enableSessionEvents { + if err := c.quicResumeSession(sessionState); err != nil { + return err + } + } + + hs.earlySecret = tls13.NewEarlySecret(hs.suite.hash.New, sessionState.secret) + binderKey := hs.earlySecret.ResumptionBinderKey() + // Clone the transcript in case a HelloRetryRequest was recorded. + transcript := cloneHash(hs.transcript, hs.suite.hash) + if transcript == nil { + c.sendAlert(alertInternalError) + return errors.New("tls: internal error: failed to clone hash") + } + clientHelloBytes, err := hs.clientHello.marshalWithoutBinders() + if err != nil { + c.sendAlert(alertInternalError) + return err + } + transcript.Write(clientHelloBytes) + pskBinder := hs.suite.finishedHash(binderKey, transcript) + if !hmac.Equal(hs.clientHello.pskBinders[i], pskBinder) { + c.sendAlert(alertDecryptError) + return errors.New("tls: invalid PSK binder") + } + + if c.quic != nil && hs.clientHello.earlyData && i == 0 && + sessionState.EarlyData && sessionState.cipherSuite == hs.suite.id && + sessionState.alpnProtocol == c.clientProtocol { + hs.earlyData = true + + transcript := hs.suite.hash.New() + if err := transcriptMsg(hs.clientHello, transcript); err != nil { + return err + } + earlyTrafficSecret := hs.earlySecret.ClientEarlyTrafficSecret(transcript) + c.quicSetReadSecret(QUICEncryptionLevelEarly, hs.suite.id, earlyTrafficSecret) + } + + c.didResume = true + c.peerCertificates = sessionState.peerCertificates + c.ocspResponse = sessionState.ocspResponse + c.scts = sessionState.scts + c.verifiedChains = sessionState.verifiedChains + + hs.hello.selectedIdentityPresent = true + hs.hello.selectedIdentity = uint16(i) + hs.usingPSK = true + return nil + } + + return nil +} + +// cloneHash uses the encoding.BinaryMarshaler and encoding.BinaryUnmarshaler +// interfaces implemented by standard library hashes to clone the state of in +// to a new instance of h. It returns nil if the operation fails. +func cloneHash(in hash.Hash, h crypto.Hash) hash.Hash { + // Recreate the interface to avoid importing encoding. + type binaryMarshaler interface { + MarshalBinary() (data []byte, err error) + UnmarshalBinary(data []byte) error + } + marshaler, ok := in.(binaryMarshaler) + if !ok { + return nil + } + state, err := marshaler.MarshalBinary() + if err != nil { + return nil + } + out := h.New() + unmarshaler, ok := out.(binaryMarshaler) + if !ok { + return nil + } + if err := unmarshaler.UnmarshalBinary(state); err != nil { + return nil + } + return out +} + +func (hs *serverHandshakeStateTLS13) pickCertificate() error { + c := hs.c + + // Only one of PSK and certificates are used at a time. + if hs.usingPSK { + return nil + } + + // signature_algorithms is required in TLS 1.3. See RFC 8446, Section 4.2.3. + if len(hs.clientHello.supportedSignatureAlgorithms) == 0 { + return c.sendAlert(alertMissingExtension) + } + + certificate, err := c.config.getCertificate(clientHelloInfo(hs.ctx, c, hs.clientHello)) + if err != nil { + if err == errNoCertificates { + c.sendAlert(alertUnrecognizedName) + } else { + c.sendAlert(alertInternalError) + } + return err + } + hs.sigAlg, err = selectSignatureScheme(c.vers, certificate, hs.clientHello.supportedSignatureAlgorithms) + if err != nil { + // getCertificate returned a certificate that is unsupported or + // incompatible with the client's signature algorithms. + c.sendAlert(alertHandshakeFailure) + return err + } + hs.cert = certificate + + return nil +} + +// sendDummyChangeCipherSpec sends a ChangeCipherSpec record for compatibility +// with middleboxes that didn't implement TLS correctly. See RFC 8446, Appendix D.4. +func (hs *serverHandshakeStateTLS13) sendDummyChangeCipherSpec() error { + if hs.c.quic != nil { + return nil + } + if hs.sentDummyCCS { + return nil + } + hs.sentDummyCCS = true + + return hs.c.writeChangeCipherRecord() +} + +func (hs *serverHandshakeStateTLS13) doHelloRetryRequest(selectedGroup CurveID) (*keyShare, error) { + c := hs.c + + // The first ClientHello gets double-hashed into the transcript upon a + // HelloRetryRequest. See RFC 8446, Section 4.4.1. + if err := transcriptMsg(hs.clientHello, hs.transcript); err != nil { + return nil, err + } + chHash := hs.transcript.Sum(nil) + hs.transcript.Reset() + hs.transcript.Write([]byte{typeMessageHash, 0, 0, uint8(len(chHash))}) + hs.transcript.Write(chHash) + + helloRetryRequest := &serverHelloMsg{ + vers: hs.hello.vers, + random: helloRetryRequestRandom, + sessionId: hs.hello.sessionId, + cipherSuite: hs.hello.cipherSuite, + compressionMethod: hs.hello.compressionMethod, + supportedVersion: hs.hello.supportedVersion, + selectedGroup: selectedGroup, + } + + if hs.echContext != nil { + // Compute the acceptance message. + helloRetryRequest.encryptedClientHello = make([]byte, 8) + confTranscript := cloneHash(hs.transcript, hs.suite.hash) + if err := transcriptMsg(helloRetryRequest, confTranscript); err != nil { + return nil, err + } + acceptConfirmation := tls13.ExpandLabel(hs.suite.hash.New, + hkdf.Extract(hs.suite.hash.New, hs.clientHello.random, nil), + "hrr ech accept confirmation", + confTranscript.Sum(nil), + 8, + ) + helloRetryRequest.encryptedClientHello = acceptConfirmation + } + + if _, err := hs.c.writeHandshakeRecord(helloRetryRequest, hs.transcript); err != nil { + return nil, err + } + + if err := hs.sendDummyChangeCipherSpec(); err != nil { + return nil, err + } + + // clientHelloMsg is not included in the transcript. + msg, err := c.readHandshake(nil) + if err != nil { + return nil, err + } + + clientHello, ok := msg.(*clientHelloMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return nil, unexpectedMessageError(clientHello, msg) + } + + if hs.echContext != nil { + if len(clientHello.encryptedClientHello) == 0 { + c.sendAlert(alertMissingExtension) + return nil, errors.New("tls: second client hello missing encrypted client hello extension") + } + + echType, echCiphersuite, configID, encap, payload, err := parseECHExt(clientHello.encryptedClientHello) + if err != nil { + c.sendAlert(alertDecodeError) + return nil, errors.New("tls: client sent invalid encrypted client hello extension") + } + + if echType == outerECHExt && hs.echContext.inner || echType == innerECHExt && !hs.echContext.inner { + c.sendAlert(alertDecodeError) + return nil, errors.New("tls: unexpected switch in encrypted client hello extension type") + } + + if echType == outerECHExt { + if echCiphersuite != hs.echContext.ciphersuite || configID != hs.echContext.configID || len(encap) != 0 { + c.sendAlert(alertIllegalParameter) + return nil, errors.New("tls: second client hello encrypted client hello extension does not match") + } + + encodedInner, err := decryptECHPayload(hs.echContext.hpkeContext, clientHello.original, payload) + if err != nil { + c.sendAlert(alertDecryptError) + return nil, errors.New("tls: failed to decrypt second client hello encrypted client hello extension payload") + } + + echInner, err := decodeInnerClientHello(clientHello, encodedInner) + if err != nil { + c.sendAlert(alertIllegalParameter) + return nil, errors.New("tls: client sent invalid encrypted client hello extension") + } + + clientHello = echInner + } + } + + if len(clientHello.keyShares) != 1 { + c.sendAlert(alertIllegalParameter) + return nil, errors.New("tls: client didn't send one key share in second ClientHello") + } + ks := &clientHello.keyShares[0] + + if ks.group != selectedGroup { + c.sendAlert(alertIllegalParameter) + return nil, errors.New("tls: client sent unexpected key share in second ClientHello") + } + + if clientHello.earlyData { + c.sendAlert(alertIllegalParameter) + return nil, errors.New("tls: client indicated early data in second ClientHello") + } + + if illegalClientHelloChange(clientHello, hs.clientHello) { + c.sendAlert(alertIllegalParameter) + return nil, errors.New("tls: client illegally modified second ClientHello") + } + + c.didHRR = true + hs.clientHello = clientHello + return ks, nil +} + +// illegalClientHelloChange reports whether the two ClientHello messages are +// different, with the exception of the changes allowed before and after a +// HelloRetryRequest. See RFC 8446, Section 4.1.2. +func illegalClientHelloChange(ch, ch1 *clientHelloMsg) bool { + if len(ch.supportedVersions) != len(ch1.supportedVersions) || + len(ch.cipherSuites) != len(ch1.cipherSuites) || + len(ch.supportedCurves) != len(ch1.supportedCurves) || + len(ch.supportedSignatureAlgorithms) != len(ch1.supportedSignatureAlgorithms) || + len(ch.supportedSignatureAlgorithmsCert) != len(ch1.supportedSignatureAlgorithmsCert) || + len(ch.alpnProtocols) != len(ch1.alpnProtocols) { + return true + } + for i := range ch.supportedVersions { + if ch.supportedVersions[i] != ch1.supportedVersions[i] { + return true + } + } + for i := range ch.cipherSuites { + if ch.cipherSuites[i] != ch1.cipherSuites[i] { + return true + } + } + for i := range ch.supportedCurves { + if ch.supportedCurves[i] != ch1.supportedCurves[i] { + return true + } + } + for i := range ch.supportedSignatureAlgorithms { + if ch.supportedSignatureAlgorithms[i] != ch1.supportedSignatureAlgorithms[i] { + return true + } + } + for i := range ch.supportedSignatureAlgorithmsCert { + if ch.supportedSignatureAlgorithmsCert[i] != ch1.supportedSignatureAlgorithmsCert[i] { + return true + } + } + for i := range ch.alpnProtocols { + if ch.alpnProtocols[i] != ch1.alpnProtocols[i] { + return true + } + } + return ch.vers != ch1.vers || + !bytes.Equal(ch.random, ch1.random) || + !bytes.Equal(ch.sessionId, ch1.sessionId) || + !bytes.Equal(ch.compressionMethods, ch1.compressionMethods) || + ch.serverName != ch1.serverName || + ch.ocspStapling != ch1.ocspStapling || + !bytes.Equal(ch.supportedPoints, ch1.supportedPoints) || + ch.ticketSupported != ch1.ticketSupported || + !bytes.Equal(ch.sessionTicket, ch1.sessionTicket) || + ch.secureRenegotiationSupported != ch1.secureRenegotiationSupported || + !bytes.Equal(ch.secureRenegotiation, ch1.secureRenegotiation) || + ch.scts != ch1.scts || + !bytes.Equal(ch.cookie, ch1.cookie) || + !bytes.Equal(ch.pskModes, ch1.pskModes) +} + +func (hs *serverHandshakeStateTLS13) sendServerParameters() error { + c := hs.c + + if hs.echContext != nil { + copy(hs.hello.random[32-8:], make([]byte, 8)) + echTranscript := cloneHash(hs.transcript, hs.suite.hash) + echTranscript.Write(hs.clientHello.original) + if err := transcriptMsg(hs.hello, echTranscript); err != nil { + return err + } + // compute the acceptance message + acceptConfirmation := tls13.ExpandLabel(hs.suite.hash.New, + hkdf.Extract(hs.suite.hash.New, hs.clientHello.random, nil), + "ech accept confirmation", + echTranscript.Sum(nil), + 8, + ) + copy(hs.hello.random[32-8:], acceptConfirmation) + } + + if err := transcriptMsg(hs.clientHello, hs.transcript); err != nil { + return err + } + + if _, err := hs.c.writeHandshakeRecord(hs.hello, hs.transcript); err != nil { + return err + } + + if err := hs.sendDummyChangeCipherSpec(); err != nil { + return err + } + + earlySecret := hs.earlySecret + if earlySecret == nil { + earlySecret = tls13.NewEarlySecret(hs.suite.hash.New, nil) + } + hs.handshakeSecret = earlySecret.HandshakeSecret(hs.sharedKey) + + clientSecret := hs.handshakeSecret.ClientHandshakeTrafficSecret(hs.transcript) + c.in.setTrafficSecret(hs.suite, QUICEncryptionLevelHandshake, clientSecret) + serverSecret := hs.handshakeSecret.ServerHandshakeTrafficSecret(hs.transcript) + c.out.setTrafficSecret(hs.suite, QUICEncryptionLevelHandshake, serverSecret) + + if c.quic != nil { + if c.hand.Len() != 0 { + c.sendAlert(alertUnexpectedMessage) + } + c.quicSetWriteSecret(QUICEncryptionLevelHandshake, hs.suite.id, serverSecret) + c.quicSetReadSecret(QUICEncryptionLevelHandshake, hs.suite.id, clientSecret) + } + + err := c.config.writeKeyLog(keyLogLabelClientHandshake, hs.clientHello.random, clientSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + err = c.config.writeKeyLog(keyLogLabelServerHandshake, hs.clientHello.random, serverSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + + encryptedExtensions := new(encryptedExtensionsMsg) + encryptedExtensions.alpnProtocol = c.clientProtocol + + if c.quic != nil { + p, err := c.quicGetTransportParameters() + if err != nil { + return err + } + encryptedExtensions.quicTransportParameters = p + encryptedExtensions.earlyData = hs.earlyData + } + + // If client sent ECH extension, but we didn't accept it, + // send retry configs, if available. + if len(hs.c.config.EncryptedClientHelloKeys) > 0 && len(hs.clientHello.encryptedClientHello) > 0 && hs.echContext == nil { + encryptedExtensions.echRetryConfigs, err = buildRetryConfigList(hs.c.config.EncryptedClientHelloKeys) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + } + + if _, err := hs.c.writeHandshakeRecord(encryptedExtensions, hs.transcript); err != nil { + return err + } + + return nil +} + +func (hs *serverHandshakeStateTLS13) requestClientCert() bool { + return hs.c.config.ClientAuth >= RequestClientCert && !hs.usingPSK +} + +func (hs *serverHandshakeStateTLS13) sendServerCertificate() error { + c := hs.c + + // Only one of PSK and certificates are used at a time. + if hs.usingPSK { + return nil + } + + if hs.requestClientCert() { + // Request a client certificate + certReq := new(certificateRequestMsgTLS13) + certReq.ocspStapling = true + certReq.scts = true + certReq.supportedSignatureAlgorithms = c.config.supportedSignatureAlgorithms() // [UTLS] ported from cloudflare/go + if c.config.ClientCAs != nil { + certReq.certificateAuthorities = c.config.ClientCAs.Subjects() + } + + if _, err := hs.c.writeHandshakeRecord(certReq, hs.transcript); err != nil { + return err + } + } + + certMsg := new(certificateMsgTLS13) + + certMsg.certificate = *hs.cert + certMsg.scts = hs.clientHello.scts && len(hs.cert.SignedCertificateTimestamps) > 0 + certMsg.ocspStapling = hs.clientHello.ocspStapling && len(hs.cert.OCSPStaple) > 0 + + if _, err := hs.c.writeHandshakeRecord(certMsg, hs.transcript); err != nil { + return err + } + + certVerifyMsg := new(certificateVerifyMsg) + certVerifyMsg.hasSignatureAlgorithm = true + certVerifyMsg.signatureAlgorithm = hs.sigAlg + + sigType, sigHash, err := typeAndHashFromSignatureScheme(hs.sigAlg) + if err != nil { + return c.sendAlert(alertInternalError) + } + + signed := signedMessage(sigHash, serverSignatureContext, hs.transcript) + signOpts := crypto.SignerOpts(sigHash) + if sigType == signatureRSAPSS { + signOpts = &rsa.PSSOptions{SaltLength: rsa.PSSSaltLengthEqualsHash, Hash: sigHash} + } + sig, err := hs.cert.PrivateKey.(crypto.Signer).Sign(c.config.rand(), signed, signOpts) + if err != nil { + public := hs.cert.PrivateKey.(crypto.Signer).Public() + if rsaKey, ok := public.(*rsa.PublicKey); ok && sigType == signatureRSAPSS && + rsaKey.N.BitLen()/8 < sigHash.Size()*2+2 { // key too small for RSA-PSS + c.sendAlert(alertHandshakeFailure) + } else { + c.sendAlert(alertInternalError) + } + return errors.New("tls: failed to sign handshake: " + err.Error()) + } + certVerifyMsg.signature = sig + + if _, err := hs.c.writeHandshakeRecord(certVerifyMsg, hs.transcript); err != nil { + return err + } + + return nil +} + +func (hs *serverHandshakeStateTLS13) sendServerFinished() error { + c := hs.c + + finished := &finishedMsg{ + verifyData: hs.suite.finishedHash(c.out.trafficSecret, hs.transcript), + } + + if _, err := hs.c.writeHandshakeRecord(finished, hs.transcript); err != nil { + return err + } + + // Derive secrets that take context through the server Finished. + + hs.masterSecret = hs.handshakeSecret.MasterSecret() + + hs.trafficSecret = hs.masterSecret.ClientApplicationTrafficSecret(hs.transcript) + serverSecret := hs.masterSecret.ServerApplicationTrafficSecret(hs.transcript) + c.out.setTrafficSecret(hs.suite, QUICEncryptionLevelApplication, serverSecret) + + if c.quic != nil { + if c.hand.Len() != 0 { + // TODO: Handle this in setTrafficSecret? + c.sendAlert(alertUnexpectedMessage) + } + c.quicSetWriteSecret(QUICEncryptionLevelApplication, hs.suite.id, serverSecret) + } + + err := c.config.writeKeyLog(keyLogLabelClientTraffic, hs.clientHello.random, hs.trafficSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + err = c.config.writeKeyLog(keyLogLabelServerTraffic, hs.clientHello.random, serverSecret) + if err != nil { + c.sendAlert(alertInternalError) + return err + } + + c.ekm = hs.suite.exportKeyingMaterial(hs.masterSecret, hs.transcript) + + // If we did not request client certificates, at this point we can + // precompute the client finished and roll the transcript forward to send + // session tickets in our first flight. + if !hs.requestClientCert() { + if err := hs.sendSessionTickets(); err != nil { + return err + } + } + + return nil +} + +func (hs *serverHandshakeStateTLS13) shouldSendSessionTickets() bool { + if hs.c.config.SessionTicketsDisabled { + return false + } + + // QUIC tickets are sent by QUICConn.SendSessionTicket, not automatically. + if hs.c.quic != nil { + return false + } + + // Don't send tickets the client wouldn't use. See RFC 8446, Section 4.2.9. + for _, pskMode := range hs.clientHello.pskModes { + if pskMode == pskModeDHE { + return true + } + } + return false +} + +func (hs *serverHandshakeStateTLS13) sendSessionTickets() error { + c := hs.c + + hs.clientFinished = hs.suite.finishedHash(c.in.trafficSecret, hs.transcript) + finishedMsg := &finishedMsg{ + verifyData: hs.clientFinished, + } + if err := transcriptMsg(finishedMsg, hs.transcript); err != nil { + return err + } + + c.resumptionSecret = hs.masterSecret.ResumptionMasterSecret(hs.transcript) + + if !hs.shouldSendSessionTickets() { + return nil + } + return c.sendSessionTicket(false, nil) +} + +func (c *Conn) sendSessionTicket(earlyData bool, extra [][]byte) error { + suite := cipherSuiteTLS13ByID(c.cipherSuite) + if suite == nil { + return errors.New("tls: internal error: unknown cipher suite") + } + // ticket_nonce, which must be unique per connection, is always left at + // zero because we only ever send one ticket per connection. + psk := tls13.ExpandLabel(suite.hash.New, c.resumptionSecret, "resumption", + nil, suite.hash.Size()) + + m := new(newSessionTicketMsgTLS13) + + state := c.sessionState() + state.secret = psk + state.EarlyData = earlyData + state.Extra = extra + if c.config.WrapSession != nil { + var err error + m.label, err = c.config.WrapSession(c.connectionStateLocked(), state) + if err != nil { + return err + } + } else { + stateBytes, err := state.Bytes() + if err != nil { + c.sendAlert(alertInternalError) + return err + } + m.label, err = c.config.encryptTicket(stateBytes, c.ticketKeys) + if err != nil { + return err + } + } + m.lifetime = uint32(maxSessionTicketLifetime / time.Second) + + // ticket_age_add is a random 32-bit value. See RFC 8446, section 4.6.1 + // The value is not stored anywhere; we never need to check the ticket age + // because 0-RTT is not supported. + ageAdd := make([]byte, 4) + if _, err := c.config.rand().Read(ageAdd); err != nil { + return err + } + m.ageAdd = byteorder.LEUint32(ageAdd) + + if earlyData { + // RFC 9001, Section 4.6.1 + m.maxEarlyData = 0xffffffff + } + + if _, err := c.writeHandshakeRecord(m, nil); err != nil { + return err + } + + return nil +} + +func (hs *serverHandshakeStateTLS13) readClientCertificate() error { + c := hs.c + + if !hs.requestClientCert() { + // Make sure the connection is still being verified whether or not + // the server requested a client certificate. + if c.config.VerifyConnection != nil { + if err := c.config.VerifyConnection(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + return nil + } + + // If we requested a client certificate, then the client must send a + // certificate message. If it's empty, no CertificateVerify is sent. + + msg, err := c.readHandshake(hs.transcript) + if err != nil { + return err + } + + certMsg, ok := msg.(*certificateMsgTLS13) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(certMsg, msg) + } + + if err := c.processCertsFromClient(certMsg.certificate); err != nil { + return err + } + + if c.config.VerifyConnection != nil { + if err := c.config.VerifyConnection(c.connectionStateLocked()); err != nil { + c.sendAlert(alertBadCertificate) + return err + } + } + + if len(certMsg.certificate.Certificate) != 0 { + // certificateVerifyMsg is included in the transcript, but not until + // after we verify the handshake signature, since the state before + // this message was sent is used. + msg, err = c.readHandshake(nil) + if err != nil { + return err + } + + certVerify, ok := msg.(*certificateVerifyMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(certVerify, msg) + } + + // See RFC 8446, Section 4.4.3. + if !isSupportedSignatureAlgorithm(certVerify.signatureAlgorithm, c.config.supportedSignatureAlgorithms()) { // [UTLS] ported from cloudflare/go + c.sendAlert(alertIllegalParameter) + return errors.New("tls: client certificate used with invalid signature algorithm") + } + sigType, sigHash, err := typeAndHashFromSignatureScheme(certVerify.signatureAlgorithm) + if err != nil { + return c.sendAlert(alertInternalError) + } + if sigType == signaturePKCS1v15 || sigHash == crypto.SHA1 { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: client certificate used with invalid signature algorithm") + } + signed := signedMessage(sigHash, clientSignatureContext, hs.transcript) + if err := verifyHandshakeSignature(sigType, c.peerCertificates[0].PublicKey, + sigHash, signed, certVerify.signature); err != nil { + c.sendAlert(alertDecryptError) + return errors.New("tls: invalid signature by the client certificate: " + err.Error()) + } + + if err := transcriptMsg(certVerify, hs.transcript); err != nil { + return err + } + } + + // If we waited until the client certificates to send session tickets, we + // are ready to do it now. + if err := hs.sendSessionTickets(); err != nil { + return err + } + + return nil +} + +func (hs *serverHandshakeStateTLS13) readClientFinished() error { + c := hs.c + + // finishedMsg is not included in the transcript. + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + + finished, ok := msg.(*finishedMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(finished, msg) + } + + if !hmac.Equal(hs.clientFinished, finished.verifyData) { + c.sendAlert(alertDecryptError) + return errors.New("tls: invalid client finished hash") + } + + c.in.setTrafficSecret(hs.suite, QUICEncryptionLevelApplication, hs.trafficSecret) + + return nil +} diff --git a/backend/vendor/github.com/refraction-networking/utls/internal/boring/notboring.go b/backend/vendor/github.com/refraction-networking/utls/internal/boring/notboring.go new file mode 100644 index 0000000..913afd5 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/internal/boring/notboring.go @@ -0,0 +1,20 @@ +package boring + +import ( + "crypto/cipher" + "errors" +) + +const Enabled bool = false + +func NewGCMTLS(_ cipher.Block) (cipher.AEAD, error) { + return nil, errors.New("boring not implemented") +} + +func NewGCMTLS13(_ cipher.Block) (cipher.AEAD, error) { + return nil, errors.New("boring not implemented") +} + +func Unreachable() { + // do nothing +} diff --git a/backend/vendor/github.com/refraction-networking/utls/internal/byteorder/byteorder.go b/backend/vendor/github.com/refraction-networking/utls/internal/byteorder/byteorder.go new file mode 100644 index 0000000..01500a8 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/internal/byteorder/byteorder.go @@ -0,0 +1,149 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package byteorder provides functions for decoding and encoding +// little and big endian integer types from/to byte slices. +package byteorder + +func LEUint16(b []byte) uint16 { + _ = b[1] // bounds check hint to compiler; see golang.org/issue/14808 + return uint16(b[0]) | uint16(b[1])<<8 +} + +func LEPutUint16(b []byte, v uint16) { + _ = b[1] // early bounds check to guarantee safety of writes below + b[0] = byte(v) + b[1] = byte(v >> 8) +} + +func LEAppendUint16(b []byte, v uint16) []byte { + return append(b, + byte(v), + byte(v>>8), + ) +} + +func LEUint32(b []byte) uint32 { + _ = b[3] // bounds check hint to compiler; see golang.org/issue/14808 + return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 +} + +func LEPutUint32(b []byte, v uint32) { + _ = b[3] // early bounds check to guarantee safety of writes below + b[0] = byte(v) + b[1] = byte(v >> 8) + b[2] = byte(v >> 16) + b[3] = byte(v >> 24) +} + +func LEAppendUint32(b []byte, v uint32) []byte { + return append(b, + byte(v), + byte(v>>8), + byte(v>>16), + byte(v>>24), + ) +} + +func LEUint64(b []byte) uint64 { + _ = b[7] // bounds check hint to compiler; see golang.org/issue/14808 + return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | + uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56 +} + +func LEPutUint64(b []byte, v uint64) { + _ = b[7] // early bounds check to guarantee safety of writes below + b[0] = byte(v) + b[1] = byte(v >> 8) + b[2] = byte(v >> 16) + b[3] = byte(v >> 24) + b[4] = byte(v >> 32) + b[5] = byte(v >> 40) + b[6] = byte(v >> 48) + b[7] = byte(v >> 56) +} + +func LEAppendUint64(b []byte, v uint64) []byte { + return append(b, + byte(v), + byte(v>>8), + byte(v>>16), + byte(v>>24), + byte(v>>32), + byte(v>>40), + byte(v>>48), + byte(v>>56), + ) +} + +func BEUint16(b []byte) uint16 { + _ = b[1] // bounds check hint to compiler; see golang.org/issue/14808 + return uint16(b[1]) | uint16(b[0])<<8 +} + +func BEPutUint16(b []byte, v uint16) { + _ = b[1] // early bounds check to guarantee safety of writes below + b[0] = byte(v >> 8) + b[1] = byte(v) +} + +func BEAppendUint16(b []byte, v uint16) []byte { + return append(b, + byte(v>>8), + byte(v), + ) +} + +func BEUint32(b []byte) uint32 { + _ = b[3] // bounds check hint to compiler; see golang.org/issue/14808 + return uint32(b[3]) | uint32(b[2])<<8 | uint32(b[1])<<16 | uint32(b[0])<<24 +} + +func BEPutUint32(b []byte, v uint32) { + _ = b[3] // early bounds check to guarantee safety of writes below + b[0] = byte(v >> 24) + b[1] = byte(v >> 16) + b[2] = byte(v >> 8) + b[3] = byte(v) +} + +func BEAppendUint32(b []byte, v uint32) []byte { + return append(b, + byte(v>>24), + byte(v>>16), + byte(v>>8), + byte(v), + ) +} + +func BEUint64(b []byte) uint64 { + _ = b[7] // bounds check hint to compiler; see golang.org/issue/14808 + return uint64(b[7]) | uint64(b[6])<<8 | uint64(b[5])<<16 | uint64(b[4])<<24 | + uint64(b[3])<<32 | uint64(b[2])<<40 | uint64(b[1])<<48 | uint64(b[0])<<56 +} + +func BEPutUint64(b []byte, v uint64) { + _ = b[7] // early bounds check to guarantee safety of writes below + b[0] = byte(v >> 56) + b[1] = byte(v >> 48) + b[2] = byte(v >> 40) + b[3] = byte(v >> 32) + b[4] = byte(v >> 24) + b[5] = byte(v >> 16) + b[6] = byte(v >> 8) + b[7] = byte(v) +} + +func BEAppendUint64(b []byte, v uint64) []byte { + return append(b, + byte(v>>56), + byte(v>>48), + byte(v>>40), + byte(v>>32), + byte(v>>24), + byte(v>>16), + byte(v>>8), + byte(v), + ) +} diff --git a/backend/vendor/github.com/refraction-networking/utls/internal/fips140tls/fipstls.go b/backend/vendor/github.com/refraction-networking/utls/internal/fips140tls/fipstls.go new file mode 100644 index 0000000..df03808 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/internal/fips140tls/fipstls.go @@ -0,0 +1,5 @@ +package fips140tls + +func Required() bool { + return false +} diff --git a/backend/vendor/github.com/refraction-networking/utls/internal/helper/typeconv.go b/backend/vendor/github.com/refraction-networking/utls/internal/helper/typeconv.go new file mode 100644 index 0000000..73ec058 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/internal/helper/typeconv.go @@ -0,0 +1,23 @@ +package helper + +import ( + "errors" + + "golang.org/x/crypto/cryptobyte" +) + +// Uint8to16 converts a slice of uint8 to a slice of uint16. +// e.g. []uint8{0x00, 0x01, 0x00, 0x02} -> []uint16{0x0001, 0x0002} +func Uint8to16(in []uint8) ([]uint16, error) { + s := cryptobyte.String(in) + var out []uint16 + for !s.Empty() { + var v uint16 + if s.ReadUint16(&v) { + out = append(out, v) + } else { + return nil, errors.New("ReadUint16 failed") + } + } + return out, nil +} diff --git a/backend/vendor/github.com/refraction-networking/utls/internal/hkdf/hkdf.go b/backend/vendor/github.com/refraction-networking/utls/internal/hkdf/hkdf.go new file mode 100644 index 0000000..184ef7b --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/internal/hkdf/hkdf.go @@ -0,0 +1,24 @@ +package hkdf + +import ( + "crypto/hkdf" + "hash" +) + +func Extract[H hash.Hash](h func() H, secret, salt []byte) []byte { + res, err := hkdf.Extract(h, secret, salt) + if err != nil { + panic(err) + } + + return res +} + +func Expand[H hash.Hash](h func() H, pseudorandomKey []byte, info string, keyLength int) []byte { + res, err := hkdf.Expand(h, pseudorandomKey, info, keyLength) + if err != nil { + panic(err) + } + + return res +} diff --git a/backend/vendor/github.com/refraction-networking/utls/internal/hpke/hpke.go b/backend/vendor/github.com/refraction-networking/utls/internal/hpke/hpke.go new file mode 100644 index 0000000..6887661 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/internal/hpke/hpke.go @@ -0,0 +1,333 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package hpke + +import ( + "crypto" + "crypto/aes" + "crypto/cipher" + "crypto/ecdh" + "crypto/rand" + "errors" + "math/bits" + + "github.com/refraction-networking/utls/internal/byteorder" + "github.com/refraction-networking/utls/internal/hkdf" + "golang.org/x/crypto/chacha20poly1305" +) + +// testingOnlyGenerateKey is only used during testing, to provide +// a fixed test key to use when checking the RFC 9180 vectors. +var testingOnlyGenerateKey func() (*ecdh.PrivateKey, error) + +type hkdfKDF struct { + hash crypto.Hash +} + +func (kdf *hkdfKDF) LabeledExtract(sid []byte, salt []byte, label string, inputKey []byte) []byte { + labeledIKM := make([]byte, 0, 7+len(sid)+len(label)+len(inputKey)) + labeledIKM = append(labeledIKM, []byte("HPKE-v1")...) + labeledIKM = append(labeledIKM, sid...) + labeledIKM = append(labeledIKM, label...) + labeledIKM = append(labeledIKM, inputKey...) + return hkdf.Extract(kdf.hash.New, labeledIKM, salt) +} + +func (kdf *hkdfKDF) LabeledExpand(suiteID []byte, randomKey []byte, label string, info []byte, length uint16) []byte { + labeledInfo := make([]byte, 0, 2+7+len(suiteID)+len(label)+len(info)) + labeledInfo = byteorder.BEAppendUint16(labeledInfo, length) + labeledInfo = append(labeledInfo, []byte("HPKE-v1")...) + labeledInfo = append(labeledInfo, suiteID...) + labeledInfo = append(labeledInfo, label...) + labeledInfo = append(labeledInfo, info...) + return hkdf.Expand(kdf.hash.New, randomKey, string(labeledInfo), int(length)) +} + +// dhKEM implements the KEM specified in RFC 9180, Section 4.1. +type dhKEM struct { + dh ecdh.Curve + kdf hkdfKDF + + suiteID []byte + nSecret uint16 +} + +type KemID uint16 + +const DHKEM_X25519_HKDF_SHA256 = 0x0020 + +var SupportedKEMs = map[uint16]struct { + curve ecdh.Curve + hash crypto.Hash + nSecret uint16 +}{ + // RFC 9180 Section 7.1 + DHKEM_X25519_HKDF_SHA256: {ecdh.X25519(), crypto.SHA256, 32}, +} + +func newDHKem(kemID uint16) (*dhKEM, error) { + suite, ok := SupportedKEMs[kemID] + if !ok { + return nil, errors.New("unsupported suite ID") + } + return &dhKEM{ + dh: suite.curve, + kdf: hkdfKDF{suite.hash}, + suiteID: byteorder.BEAppendUint16([]byte("KEM"), kemID), + nSecret: suite.nSecret, + }, nil +} + +func (dh *dhKEM) ExtractAndExpand(dhKey, kemContext []byte) []byte { + eaePRK := dh.kdf.LabeledExtract(dh.suiteID[:], nil, "eae_prk", dhKey) + return dh.kdf.LabeledExpand(dh.suiteID[:], eaePRK, "shared_secret", kemContext, dh.nSecret) +} + +func (dh *dhKEM) Encap(pubRecipient *ecdh.PublicKey) (sharedSecret []byte, encapPub []byte, err error) { + var privEph *ecdh.PrivateKey + if testingOnlyGenerateKey != nil { + privEph, err = testingOnlyGenerateKey() + } else { + privEph, err = dh.dh.GenerateKey(rand.Reader) + } + if err != nil { + return nil, nil, err + } + dhVal, err := privEph.ECDH(pubRecipient) + if err != nil { + return nil, nil, err + } + encPubEph := privEph.PublicKey().Bytes() + + encPubRecip := pubRecipient.Bytes() + kemContext := append(encPubEph, encPubRecip...) + + return dh.ExtractAndExpand(dhVal, kemContext), encPubEph, nil +} + +func (dh *dhKEM) Decap(encPubEph []byte, secRecipient *ecdh.PrivateKey) ([]byte, error) { + pubEph, err := dh.dh.NewPublicKey(encPubEph) + if err != nil { + return nil, err + } + dhVal, err := secRecipient.ECDH(pubEph) + if err != nil { + return nil, err + } + kemContext := append(encPubEph, secRecipient.PublicKey().Bytes()...) + + return dh.ExtractAndExpand(dhVal, kemContext), nil +} + +type context struct { + aead cipher.AEAD + + sharedSecret []byte + + suiteID []byte + + key []byte + baseNonce []byte + exporterSecret []byte + + seqNum uint128 +} + +type Sender struct { + *context +} + +type Receipient struct { + *context +} + +var aesGCMNew = func(key []byte) (cipher.AEAD, error) { + block, err := aes.NewCipher(key) + if err != nil { + return nil, err + } + return cipher.NewGCM(block) +} + +type AEADID uint16 + +const ( + AEAD_AES_128_GCM = 0x0001 + AEAD_AES_256_GCM = 0x0002 + AEAD_ChaCha20Poly1305 = 0x0003 +) + +var SupportedAEADs = map[uint16]struct { + keySize int + nonceSize int + aead func([]byte) (cipher.AEAD, error) +}{ + // RFC 9180, Section 7.3 + AEAD_AES_128_GCM: {keySize: 16, nonceSize: 12, aead: aesGCMNew}, + AEAD_AES_256_GCM: {keySize: 32, nonceSize: 12, aead: aesGCMNew}, + AEAD_ChaCha20Poly1305: {keySize: chacha20poly1305.KeySize, nonceSize: chacha20poly1305.NonceSize, aead: chacha20poly1305.New}, +} + +type KDFID uint16 + +const KDF_HKDF_SHA256 = 0x0001 + +var SupportedKDFs = map[uint16]func() *hkdfKDF{ + // RFC 9180, Section 7.2 + KDF_HKDF_SHA256: func() *hkdfKDF { return &hkdfKDF{crypto.SHA256} }, +} + +func newContext(sharedSecret []byte, kemID, kdfID, aeadID uint16, info []byte) (*context, error) { + sid := suiteID(kemID, kdfID, aeadID) + + kdfInit, ok := SupportedKDFs[kdfID] + if !ok { + return nil, errors.New("unsupported KDF id") + } + kdf := kdfInit() + + aeadInfo, ok := SupportedAEADs[aeadID] + if !ok { + return nil, errors.New("unsupported AEAD id") + } + + pskIDHash := kdf.LabeledExtract(sid, nil, "psk_id_hash", nil) + infoHash := kdf.LabeledExtract(sid, nil, "info_hash", info) + ksContext := append([]byte{0}, pskIDHash...) + ksContext = append(ksContext, infoHash...) + + secret := kdf.LabeledExtract(sid, sharedSecret, "secret", nil) + + key := kdf.LabeledExpand(sid, secret, "key", ksContext, uint16(aeadInfo.keySize) /* Nk - key size for AEAD */) + baseNonce := kdf.LabeledExpand(sid, secret, "base_nonce", ksContext, uint16(aeadInfo.nonceSize) /* Nn - nonce size for AEAD */) + exporterSecret := kdf.LabeledExpand(sid, secret, "exp", ksContext, uint16(kdf.hash.Size()) /* Nh - hash output size of the kdf*/) + + aead, err := aeadInfo.aead(key) + if err != nil { + return nil, err + } + + return &context{ + aead: aead, + sharedSecret: sharedSecret, + suiteID: sid, + key: key, + baseNonce: baseNonce, + exporterSecret: exporterSecret, + }, nil +} + +func SetupSender(kemID, kdfID, aeadID uint16, pub *ecdh.PublicKey, info []byte) ([]byte, *Sender, error) { + kem, err := newDHKem(kemID) + if err != nil { + return nil, nil, err + } + sharedSecret, encapsulatedKey, err := kem.Encap(pub) + if err != nil { + return nil, nil, err + } + + context, err := newContext(sharedSecret, kemID, kdfID, aeadID, info) + if err != nil { + return nil, nil, err + } + + return encapsulatedKey, &Sender{context}, nil +} + +func SetupReceipient(kemID, kdfID, aeadID uint16, priv *ecdh.PrivateKey, info, encPubEph []byte) (*Receipient, error) { + kem, err := newDHKem(kemID) + if err != nil { + return nil, err + } + sharedSecret, err := kem.Decap(encPubEph, priv) + if err != nil { + return nil, err + } + + context, err := newContext(sharedSecret, kemID, kdfID, aeadID, info) + if err != nil { + return nil, err + } + + return &Receipient{context}, nil +} + +func (ctx *context) nextNonce() []byte { + nonce := ctx.seqNum.bytes()[16-ctx.aead.NonceSize():] + for i := range ctx.baseNonce { + nonce[i] ^= ctx.baseNonce[i] + } + return nonce +} + +func (ctx *context) incrementNonce() { + // Message limit is, according to the RFC, 2^95+1, which + // is somewhat confusing, but we do as we're told. + if ctx.seqNum.bitLen() >= (ctx.aead.NonceSize()*8)-1 { + panic("message limit reached") + } + ctx.seqNum = ctx.seqNum.addOne() +} + +func (s *Sender) Seal(aad, plaintext []byte) ([]byte, error) { + ciphertext := s.aead.Seal(nil, s.nextNonce(), plaintext, aad) + s.incrementNonce() + return ciphertext, nil +} + +func (r *Receipient) Open(aad, ciphertext []byte) ([]byte, error) { + plaintext, err := r.aead.Open(nil, r.nextNonce(), ciphertext, aad) + if err != nil { + return nil, err + } + r.incrementNonce() + return plaintext, nil +} + +func suiteID(kemID, kdfID, aeadID uint16) []byte { + suiteID := make([]byte, 0, 4+2+2+2) + suiteID = append(suiteID, []byte("HPKE")...) + suiteID = byteorder.BEAppendUint16(suiteID, kemID) + suiteID = byteorder.BEAppendUint16(suiteID, kdfID) + suiteID = byteorder.BEAppendUint16(suiteID, aeadID) + return suiteID +} + +func ParseHPKEPublicKey(kemID uint16, bytes []byte) (*ecdh.PublicKey, error) { + kemInfo, ok := SupportedKEMs[kemID] + if !ok { + return nil, errors.New("unsupported KEM id") + } + return kemInfo.curve.NewPublicKey(bytes) +} + +func ParseHPKEPrivateKey(kemID uint16, bytes []byte) (*ecdh.PrivateKey, error) { + kemInfo, ok := SupportedKEMs[kemID] + if !ok { + return nil, errors.New("unsupported KEM id") + } + return kemInfo.curve.NewPrivateKey(bytes) +} + +type uint128 struct { + hi, lo uint64 +} + +func (u uint128) addOne() uint128 { + lo, carry := bits.Add64(u.lo, 1, 0) + return uint128{u.hi + carry, lo} +} + +func (u uint128) bitLen() int { + return bits.Len64(u.hi) + bits.Len64(u.lo) +} + +func (u uint128) bytes() []byte { + b := make([]byte, 16) + byteorder.BEPutUint64(b[0:], u.hi) + byteorder.BEPutUint64(b[8:], u.lo) + return b +} diff --git a/backend/vendor/github.com/refraction-networking/utls/internal/quicvarint/protocol/protocol.go b/backend/vendor/github.com/refraction-networking/utls/internal/quicvarint/protocol/protocol.go new file mode 100644 index 0000000..3cbc342 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/internal/quicvarint/protocol/protocol.go @@ -0,0 +1,157 @@ +// Copyright 2024 The quic-go Authors. All rights reserved. +// Use of this source code is governed by a MIT-style +// license that can be found in the LICENSE file of +// the quic-go repository. + +package protocol + +import ( + "fmt" + "time" +) + +// The PacketType is the Long Header Type +type PacketType uint8 + +const ( + // PacketTypeInitial is the packet type of an Initial packet + PacketTypeInitial PacketType = 1 + iota + // PacketTypeRetry is the packet type of a Retry packet + PacketTypeRetry + // PacketTypeHandshake is the packet type of a Handshake packet + PacketTypeHandshake + // PacketType0RTT is the packet type of a 0-RTT packet + PacketType0RTT +) + +func (t PacketType) String() string { + switch t { + case PacketTypeInitial: + return "Initial" + case PacketTypeRetry: + return "Retry" + case PacketTypeHandshake: + return "Handshake" + case PacketType0RTT: + return "0-RTT Protected" + default: + return fmt.Sprintf("unknown packet type: %d", t) + } +} + +type ECN uint8 + +const ( + ECNUnsupported ECN = iota + ECNNon // 00 + ECT1 // 01 + ECT0 // 10 + ECNCE // 11 +) + +func ParseECNHeaderBits(bits byte) ECN { + switch bits { + case 0: + return ECNNon + case 0b00000010: + return ECT0 + case 0b00000001: + return ECT1 + case 0b00000011: + return ECNCE + default: + panic("invalid ECN bits") + } +} + +func (e ECN) ToHeaderBits() byte { + //nolint:exhaustive // There are only 4 values. + switch e { + case ECNNon: + return 0 + case ECT0: + return 0b00000010 + case ECT1: + return 0b00000001 + case ECNCE: + return 0b00000011 + default: + panic("ECN unsupported") + } +} + +func (e ECN) String() string { + switch e { + case ECNUnsupported: + return "ECN unsupported" + case ECNNon: + return "Not-ECT" + case ECT1: + return "ECT(1)" + case ECT0: + return "ECT(0)" + case ECNCE: + return "CE" + default: + return fmt.Sprintf("invalid ECN value: %d", e) + } +} + +// A ByteCount in QUIC +type ByteCount int64 + +// MaxByteCount is the maximum value of a ByteCount +const MaxByteCount = ByteCount(1<<62 - 1) + +// InvalidByteCount is an invalid byte count +const InvalidByteCount ByteCount = -1 + +// A StatelessResetToken is a stateless reset token. +type StatelessResetToken [16]byte + +// MaxPacketBufferSize maximum packet size of any QUIC packet, based on +// ethernet's max size, minus the IP and UDP headers. IPv6 has a 40 byte header, +// UDP adds an additional 8 bytes. This is a total overhead of 48 bytes. +// Ethernet's max packet size is 1500 bytes, 1500 - 48 = 1452. +const MaxPacketBufferSize = 1452 + +// MaxLargePacketBufferSize is used when using GSO +const MaxLargePacketBufferSize = 20 * 1024 + +// MinInitialPacketSize is the minimum size an Initial packet is required to have. +const MinInitialPacketSize = 1200 + +// MinUnknownVersionPacketSize is the minimum size a packet with an unknown version +// needs to have in order to trigger a Version Negotiation packet. +const MinUnknownVersionPacketSize = MinInitialPacketSize + +// MinStatelessResetSize is the minimum size of a stateless reset packet that we send +const MinStatelessResetSize = 1 /* first byte */ + 20 /* max. conn ID length */ + 4 /* max. packet number length */ + 1 /* min. payload length */ + 16 /* token */ + +// MinConnectionIDLenInitial is the minimum length of the destination connection ID on an Initial packet. +const MinConnectionIDLenInitial = 8 + +// DefaultAckDelayExponent is the default ack delay exponent +const DefaultAckDelayExponent = 3 + +// DefaultActiveConnectionIDLimit is the default active connection ID limit +const DefaultActiveConnectionIDLimit = 2 + +// MaxAckDelayExponent is the maximum ack delay exponent +const MaxAckDelayExponent = 20 + +// DefaultMaxAckDelay is the default max_ack_delay +const DefaultMaxAckDelay = 25 * time.Millisecond + +// MaxMaxAckDelay is the maximum max_ack_delay +const MaxMaxAckDelay = (1<<14 - 1) * time.Millisecond + +// MaxConnIDLen is the maximum length of the connection ID +const MaxConnIDLen = 20 + +// InvalidPacketLimitAES is the maximum number of packets that we can fail to decrypt when using +// AEAD_AES_128_GCM or AEAD_AES_265_GCM. +const InvalidPacketLimitAES = 1 << 52 + +// InvalidPacketLimitChaCha is the maximum number of packets that we can fail to decrypt when using AEAD_CHACHA20_POLY1305. +const InvalidPacketLimitChaCha = 1 << 36 diff --git a/backend/vendor/github.com/refraction-networking/utls/internal/quicvarint/varint.go b/backend/vendor/github.com/refraction-networking/utls/internal/quicvarint/varint.go new file mode 100644 index 0000000..e4a1063 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/internal/quicvarint/varint.go @@ -0,0 +1,146 @@ +// Copyright 2024 The quic-go Authors. All rights reserved. +// Use of this source code is governed by a MIT-style +// license that can be found in the LICENSE file of +// the quic-go repository. + +package quicvarint + +import ( + "fmt" + "io" + + "github.com/refraction-networking/utls/internal/quicvarint/protocol" +) + +// taken from the QUIC draft +const ( + // Min is the minimum value allowed for a QUIC varint. + Min = 0 + + // Max is the maximum allowed value for a QUIC varint (2^62-1). + Max = maxVarInt8 + + maxVarInt1 = 63 + maxVarInt2 = 16383 + maxVarInt4 = 1073741823 + maxVarInt8 = 4611686018427387903 +) + +// Read reads a number in the QUIC varint format from r. +func Read(r io.ByteReader) (uint64, error) { + firstByte, err := r.ReadByte() + if err != nil { + return 0, err + } + // the first two bits of the first byte encode the length + len := 1 << ((firstByte & 0xc0) >> 6) + b1 := firstByte & (0xff - 0xc0) + if len == 1 { + return uint64(b1), nil + } + b2, err := r.ReadByte() + if err != nil { + return 0, err + } + if len == 2 { + return uint64(b2) + uint64(b1)<<8, nil + } + b3, err := r.ReadByte() + if err != nil { + return 0, err + } + b4, err := r.ReadByte() + if err != nil { + return 0, err + } + if len == 4 { + return uint64(b4) + uint64(b3)<<8 + uint64(b2)<<16 + uint64(b1)<<24, nil + } + b5, err := r.ReadByte() + if err != nil { + return 0, err + } + b6, err := r.ReadByte() + if err != nil { + return 0, err + } + b7, err := r.ReadByte() + if err != nil { + return 0, err + } + b8, err := r.ReadByte() + if err != nil { + return 0, err + } + return uint64(b8) + uint64(b7)<<8 + uint64(b6)<<16 + uint64(b5)<<24 + uint64(b4)<<32 + uint64(b3)<<40 + uint64(b2)<<48 + uint64(b1)<<56, nil +} + +// Append appends i in the QUIC varint format. +func Append(b []byte, i uint64) []byte { + if i <= maxVarInt1 { + return append(b, uint8(i)) + } + if i <= maxVarInt2 { + return append(b, []byte{uint8(i>>8) | 0x40, uint8(i)}...) + } + if i <= maxVarInt4 { + return append(b, []byte{uint8(i>>24) | 0x80, uint8(i >> 16), uint8(i >> 8), uint8(i)}...) + } + if i <= maxVarInt8 { + return append(b, []byte{ + uint8(i>>56) | 0xc0, uint8(i >> 48), uint8(i >> 40), uint8(i >> 32), + uint8(i >> 24), uint8(i >> 16), uint8(i >> 8), uint8(i), + }...) + } + panic(fmt.Sprintf("%#x doesn't fit into 62 bits", i)) +} + +// AppendWithLen append i in the QUIC varint format with the desired length. +func AppendWithLen(b []byte, i uint64, length protocol.ByteCount) []byte { + if length != 1 && length != 2 && length != 4 && length != 8 { + panic("invalid varint length") + } + l := Len(i) + if l == length { + return Append(b, i) + } + if l > length { + panic(fmt.Sprintf("cannot encode %d in %d bytes", i, length)) + } + if length == 2 { + b = append(b, 0b01000000) + } else if length == 4 { + b = append(b, 0b10000000) + } else if length == 8 { + b = append(b, 0b11000000) + } + for j := protocol.ByteCount(1); j < length-l; j++ { + b = append(b, 0) + } + for j := protocol.ByteCount(0); j < l; j++ { + b = append(b, uint8(i>>(8*(l-1-j)))) + } + return b +} + +// Len determines the number of bytes that will be needed to write the number i. +func Len(i uint64) protocol.ByteCount { + if i <= maxVarInt1 { + return 1 + } + if i <= maxVarInt2 { + return 2 + } + if i <= maxVarInt4 { + return 4 + } + if i <= maxVarInt8 { + return 8 + } + // Don't use a fmt.Sprintf here to format the error message. + // The function would then exceed the inlining budget. + panic(struct { + message string + num uint64 + }{"value doesn't fit into 62 bits: ", i}) +} diff --git a/backend/vendor/github.com/refraction-networking/utls/internal/tls12/tls12.go b/backend/vendor/github.com/refraction-networking/utls/internal/tls12/tls12.go new file mode 100644 index 0000000..b456ed1 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/internal/tls12/tls12.go @@ -0,0 +1,69 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls12 + +import ( + "crypto/hmac" + "hash" +) + +// PRF implements the TLS 1.2 pseudo-random function, as defined in RFC 5246, +// Section 5 and allowed by SP 800-135, Revision 1, Section 4.2.2. +func PRF(hash func() hash.Hash, secret []byte, label string, seed []byte, keyLen int) []byte { + labelAndSeed := make([]byte, len(label)+len(seed)) + copy(labelAndSeed, label) + copy(labelAndSeed[len(label):], seed) + + result := make([]byte, keyLen) + pHash(hash, result, secret, labelAndSeed) + return result +} + +// pHash implements the P_hash function, as defined in RFC 5246, Section 5. +func pHash(hash func() hash.Hash, result, secret, seed []byte) { + h := hmac.New(hash, secret) + h.Write(seed) + a := h.Sum(nil) + + for len(result) > 0 { + h.Reset() + h.Write(a) + h.Write(seed) + b := h.Sum(nil) + n := copy(result, b) + result = result[n:] + + h.Reset() + h.Write(a) + a = h.Sum(nil) + } +} + +const masterSecretLength = 48 +const extendedMasterSecretLabel = "extended master secret" + +// MasterSecret implements the TLS 1.2 extended master secret derivation, as +// defined in RFC 7627 and allowed by SP 800-135, Revision 1, Section 4.2.2. +func MasterSecret(hash func() hash.Hash, preMasterSecret, transcript []byte) []byte { + // [uTLS SECTION BEGIN] + // "The TLS 1.2 KDF is an approved KDF when the following conditions are + // satisfied: [...] (3) P_HASH uses either SHA-256, SHA-384 or SHA-512." + // h := hash() + // switch any(h).(type) { + // case *sha256.Digest: + // if h.Size() != 32 { + // fips140.RecordNonApproved() + // } + // case *sha512.Digest: + // if h.Size() != 46 && h.Size() != 64 { + // fips140.RecordNonApproved() + // } + // default: + // fips140.RecordNonApproved() + // } + // [uTLS SECTION END] + + return PRF(hash, preMasterSecret, extendedMasterSecretLabel, transcript, masterSecretLength) +} diff --git a/backend/vendor/github.com/refraction-networking/utls/internal/tls13/tls13.go b/backend/vendor/github.com/refraction-networking/utls/internal/tls13/tls13.go new file mode 100644 index 0000000..6bd5d4d --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/internal/tls13/tls13.go @@ -0,0 +1,179 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package tls13 implements the TLS 1.3 Key Schedule as specified in RFC 8446, +// Section 7.1 and allowed by FIPS 140-3 IG 2.4.B Resolution 7. +package tls13 + +import ( + fips140 "hash" + + "github.com/refraction-networking/utls/internal/byteorder" + "github.com/refraction-networking/utls/internal/hkdf" +) + +// We don't set the service indicator in this package but we delegate that to +// the underlying functions because the TLS 1.3 KDF does not have a standard of +// its own. + +// ExpandLabel implements HKDF-Expand-Label from RFC 8446, Section 7.1. +func ExpandLabel[H fips140.Hash](hash func() H, secret []byte, label string, context []byte, length int) []byte { + if len("tls13 ")+len(label) > 255 || len(context) > 255 { + // It should be impossible for this to panic: labels are fixed strings, + // and context is either a fixed-length computed hash, or parsed from a + // field which has the same length limitation. + // + // Another reasonable approach might be to return a randomized slice if + // we encounter an error, which would break the connection, but avoid + // panicking. This would perhaps be safer but significantly more + // confusing to users. + panic("tls13: label or context too long") + } + hkdfLabel := make([]byte, 0, 2+1+len("tls13 ")+len(label)+1+len(context)) + hkdfLabel = byteorder.BEAppendUint16(hkdfLabel, uint16(length)) + hkdfLabel = append(hkdfLabel, byte(len("tls13 ")+len(label))) + hkdfLabel = append(hkdfLabel, "tls13 "...) + hkdfLabel = append(hkdfLabel, label...) + hkdfLabel = append(hkdfLabel, byte(len(context))) + hkdfLabel = append(hkdfLabel, context...) + return hkdf.Expand(hash, secret, string(hkdfLabel), length) +} + +func extract[H fips140.Hash](hash func() H, newSecret, currentSecret []byte) []byte { + if newSecret == nil { + newSecret = make([]byte, hash().Size()) + } + return hkdf.Extract(hash, newSecret, currentSecret) +} + +func deriveSecret[H fips140.Hash](hash func() H, secret []byte, label string, transcript fips140.Hash) []byte { + if transcript == nil { + transcript = hash() + } + return ExpandLabel(hash, secret, label, transcript.Sum(nil), transcript.Size()) +} + +const ( + resumptionBinderLabel = "res binder" + clientEarlyTrafficLabel = "c e traffic" + clientHandshakeTrafficLabel = "c hs traffic" + serverHandshakeTrafficLabel = "s hs traffic" + clientApplicationTrafficLabel = "c ap traffic" + serverApplicationTrafficLabel = "s ap traffic" + earlyExporterLabel = "e exp master" + exporterLabel = "exp master" + resumptionLabel = "res master" +) + +type EarlySecret struct { + secret []byte + hash func() fips140.Hash +} + +func NewEarlySecret[H fips140.Hash](hash func() H, psk []byte) *EarlySecret { + return &EarlySecret{ + secret: extract(hash, psk, nil), + hash: func() fips140.Hash { return hash() }, + } +} + +func (s *EarlySecret) ResumptionBinderKey() []byte { + return deriveSecret(s.hash, s.secret, resumptionBinderLabel, nil) +} + +// ClientEarlyTrafficSecret derives the client_early_traffic_secret from the +// early secret and the transcript up to the ClientHello. +func (s *EarlySecret) ClientEarlyTrafficSecret(transcript fips140.Hash) []byte { + return deriveSecret(s.hash, s.secret, clientEarlyTrafficLabel, transcript) +} + +type HandshakeSecret struct { + secret []byte + hash func() fips140.Hash +} + +func (s *EarlySecret) HandshakeSecret(sharedSecret []byte) *HandshakeSecret { + derived := deriveSecret(s.hash, s.secret, "derived", nil) + return &HandshakeSecret{ + secret: extract(s.hash, sharedSecret, derived), + hash: s.hash, + } +} + +// ClientHandshakeTrafficSecret derives the client_handshake_traffic_secret from +// the handshake secret and the transcript up to the ServerHello. +func (s *HandshakeSecret) ClientHandshakeTrafficSecret(transcript fips140.Hash) []byte { + return deriveSecret(s.hash, s.secret, clientHandshakeTrafficLabel, transcript) +} + +// ServerHandshakeTrafficSecret derives the server_handshake_traffic_secret from +// the handshake secret and the transcript up to the ServerHello. +func (s *HandshakeSecret) ServerHandshakeTrafficSecret(transcript fips140.Hash) []byte { + return deriveSecret(s.hash, s.secret, serverHandshakeTrafficLabel, transcript) +} + +type MasterSecret struct { + secret []byte + hash func() fips140.Hash +} + +func (s *HandshakeSecret) MasterSecret() *MasterSecret { + derived := deriveSecret(s.hash, s.secret, "derived", nil) + return &MasterSecret{ + secret: extract(s.hash, nil, derived), + hash: s.hash, + } +} + +// ClientApplicationTrafficSecret derives the client_application_traffic_secret_0 +// from the master secret and the transcript up to the server Finished. +func (s *MasterSecret) ClientApplicationTrafficSecret(transcript fips140.Hash) []byte { + return deriveSecret(s.hash, s.secret, clientApplicationTrafficLabel, transcript) +} + +// ServerApplicationTrafficSecret derives the server_application_traffic_secret_0 +// from the master secret and the transcript up to the server Finished. +func (s *MasterSecret) ServerApplicationTrafficSecret(transcript fips140.Hash) []byte { + return deriveSecret(s.hash, s.secret, serverApplicationTrafficLabel, transcript) +} + +// ResumptionMasterSecret derives the resumption_master_secret from the master secret +// and the transcript up to the client Finished. +func (s *MasterSecret) ResumptionMasterSecret(transcript fips140.Hash) []byte { + return deriveSecret(s.hash, s.secret, resumptionLabel, transcript) +} + +type ExporterMasterSecret struct { + secret []byte + hash func() fips140.Hash +} + +// ExporterMasterSecret derives the exporter_master_secret from the master secret +// and the transcript up to the server Finished. +func (s *MasterSecret) ExporterMasterSecret(transcript fips140.Hash) *ExporterMasterSecret { + return &ExporterMasterSecret{ + secret: deriveSecret(s.hash, s.secret, exporterLabel, transcript), + hash: s.hash, + } +} + +// EarlyExporterMasterSecret derives the exporter_master_secret from the early secret +// and the transcript up to the ClientHello. +func (s *EarlySecret) EarlyExporterMasterSecret(transcript fips140.Hash) *ExporterMasterSecret { + return &ExporterMasterSecret{ + secret: deriveSecret(s.hash, s.secret, earlyExporterLabel, transcript), + hash: s.hash, + } +} + +func (s *ExporterMasterSecret) Exporter(label string, context []byte, length int) []byte { + secret := deriveSecret(s.hash, s.secret, label, nil) + h := s.hash() + h.Write(context) + return ExpandLabel(s.hash, secret, "exporter", h.Sum(nil), length) +} + +func TestingOnlyExporterSecret(s *ExporterMasterSecret) []byte { + return s.secret +} diff --git a/backend/vendor/github.com/refraction-networking/utls/internal/tls13/u_tls13.go b/backend/vendor/github.com/refraction-networking/utls/internal/tls13/u_tls13.go new file mode 100644 index 0000000..9e5a682 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/internal/tls13/u_tls13.go @@ -0,0 +1,31 @@ +package tls13 + +import fips140 "hash" + +func NewEarlySecretFromSecret[H fips140.Hash](hash func() H, secret []byte) *EarlySecret { + return &EarlySecret{ + secret: secret, + hash: func() fips140.Hash { return hash() }, + } +} + +func (s *EarlySecret) Secret() []byte { + if s != nil { + return s.secret + } + return nil +} + +func NewMasterSecretFromSecret[H fips140.Hash](hash func() H, secret []byte) *MasterSecret { + return &MasterSecret{ + secret: secret, + hash: func() fips140.Hash { return hash() }, + } +} + +func (s *MasterSecret) Secret() []byte { + if s != nil { + return s.secret + } + return nil +} diff --git a/backend/vendor/github.com/refraction-networking/utls/key_agreement.go b/backend/vendor/github.com/refraction-networking/utls/key_agreement.go new file mode 100644 index 0000000..671c782 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/key_agreement.go @@ -0,0 +1,366 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto" + "crypto/ecdh" + "crypto/md5" + "crypto/rsa" + "crypto/sha1" + "crypto/x509" + "errors" + "fmt" + "io" +) + +// A keyAgreement implements the client and server side of a TLS 1.0–1.2 key +// agreement protocol by generating and processing key exchange messages. +type keyAgreement interface { + // On the server side, the first two methods are called in order. + + // In the case that the key agreement protocol doesn't use a + // ServerKeyExchange message, generateServerKeyExchange can return nil, + // nil. + generateServerKeyExchange(*Config, *Certificate, *clientHelloMsg, *serverHelloMsg) (*serverKeyExchangeMsg, error) + processClientKeyExchange(*Config, *Certificate, *clientKeyExchangeMsg, uint16) ([]byte, error) + + // On the client side, the next two methods are called in order. + + // This method may not be called if the server doesn't send a + // ServerKeyExchange message. + processServerKeyExchange(*Config, *clientHelloMsg, *serverHelloMsg, *x509.Certificate, *serverKeyExchangeMsg) error + generateClientKeyExchange(*Config, *clientHelloMsg, *x509.Certificate) ([]byte, *clientKeyExchangeMsg, error) +} + +var errClientKeyExchange = errors.New("tls: invalid ClientKeyExchange message") +var errServerKeyExchange = errors.New("tls: invalid ServerKeyExchange message") + +// rsaKeyAgreement implements the standard TLS key agreement where the client +// encrypts the pre-master secret to the server's public key. +type rsaKeyAgreement struct{} + +func (ka rsaKeyAgreement) generateServerKeyExchange(config *Config, cert *Certificate, clientHello *clientHelloMsg, hello *serverHelloMsg) (*serverKeyExchangeMsg, error) { + return nil, nil +} + +func (ka rsaKeyAgreement) processClientKeyExchange(config *Config, cert *Certificate, ckx *clientKeyExchangeMsg, version uint16) ([]byte, error) { + if len(ckx.ciphertext) < 2 { + return nil, errClientKeyExchange + } + ciphertextLen := int(ckx.ciphertext[0])<<8 | int(ckx.ciphertext[1]) + if ciphertextLen != len(ckx.ciphertext)-2 { + return nil, errClientKeyExchange + } + ciphertext := ckx.ciphertext[2:] + + priv, ok := cert.PrivateKey.(crypto.Decrypter) + if !ok { + return nil, errors.New("tls: certificate private key does not implement crypto.Decrypter") + } + // Perform constant time RSA PKCS #1 v1.5 decryption + preMasterSecret, err := priv.Decrypt(config.rand(), ciphertext, &rsa.PKCS1v15DecryptOptions{SessionKeyLen: 48}) + if err != nil { + return nil, err + } + // We don't check the version number in the premaster secret. For one, + // by checking it, we would leak information about the validity of the + // encrypted pre-master secret. Secondly, it provides only a small + // benefit against a downgrade attack and some implementations send the + // wrong version anyway. See the discussion at the end of section + // 7.4.7.1 of RFC 4346. + return preMasterSecret, nil +} + +func (ka rsaKeyAgreement) processServerKeyExchange(config *Config, clientHello *clientHelloMsg, serverHello *serverHelloMsg, cert *x509.Certificate, skx *serverKeyExchangeMsg) error { + return errors.New("tls: unexpected ServerKeyExchange") +} + +func (ka rsaKeyAgreement) generateClientKeyExchange(config *Config, clientHello *clientHelloMsg, cert *x509.Certificate) ([]byte, *clientKeyExchangeMsg, error) { + preMasterSecret := make([]byte, 48) + preMasterSecret[0] = byte(clientHello.vers >> 8) + preMasterSecret[1] = byte(clientHello.vers) + _, err := io.ReadFull(config.rand(), preMasterSecret[2:]) + if err != nil { + return nil, nil, err + } + + rsaKey, ok := cert.PublicKey.(*rsa.PublicKey) + if !ok { + return nil, nil, errors.New("tls: server certificate contains incorrect key type for selected ciphersuite") + } + encrypted, err := rsa.EncryptPKCS1v15(config.rand(), rsaKey, preMasterSecret) + if err != nil { + return nil, nil, err + } + ckx := new(clientKeyExchangeMsg) + ckx.ciphertext = make([]byte, len(encrypted)+2) + ckx.ciphertext[0] = byte(len(encrypted) >> 8) + ckx.ciphertext[1] = byte(len(encrypted)) + copy(ckx.ciphertext[2:], encrypted) + return preMasterSecret, ckx, nil +} + +// sha1Hash calculates a SHA1 hash over the given byte slices. +func sha1Hash(slices [][]byte) []byte { + hsha1 := sha1.New() + for _, slice := range slices { + hsha1.Write(slice) + } + return hsha1.Sum(nil) +} + +// md5SHA1Hash implements TLS 1.0's hybrid hash function which consists of the +// concatenation of an MD5 and SHA1 hash. +func md5SHA1Hash(slices [][]byte) []byte { + md5sha1 := make([]byte, md5.Size+sha1.Size) + hmd5 := md5.New() + for _, slice := range slices { + hmd5.Write(slice) + } + copy(md5sha1, hmd5.Sum(nil)) + copy(md5sha1[md5.Size:], sha1Hash(slices)) + return md5sha1 +} + +// hashForServerKeyExchange hashes the given slices and returns their digest +// using the given hash function (for TLS 1.2) or using a default based on +// the sigType (for earlier TLS versions). For Ed25519 signatures, which don't +// do pre-hashing, it returns the concatenation of the slices. +func hashForServerKeyExchange(sigType uint8, hashFunc crypto.Hash, version uint16, slices ...[]byte) []byte { + if sigType == signatureEd25519 || circlSchemeBySigType(sigType) != nil { // [UTLS] ported from cloudflare/go + var signed []byte + for _, slice := range slices { + signed = append(signed, slice...) + } + return signed + } + if version >= VersionTLS12 { + h := hashFunc.New() + for _, slice := range slices { + h.Write(slice) + } + digest := h.Sum(nil) + return digest + } + if sigType == signatureECDSA { + return sha1Hash(slices) + } + return md5SHA1Hash(slices) +} + +// ecdheKeyAgreement implements a TLS key agreement where the server +// generates an ephemeral EC public/private key pair and signs it. The +// pre-master secret is then calculated using ECDH. The signature may +// be ECDSA, Ed25519 or RSA. +type ecdheKeyAgreement struct { + version uint16 + isRSA bool + key *ecdh.PrivateKey + + // ckx and preMasterSecret are generated in processServerKeyExchange + // and returned in generateClientKeyExchange. + ckx *clientKeyExchangeMsg + preMasterSecret []byte +} + +func (ka *ecdheKeyAgreement) generateServerKeyExchange(config *Config, cert *Certificate, clientHello *clientHelloMsg, hello *serverHelloMsg) (*serverKeyExchangeMsg, error) { + var curveID CurveID + for _, c := range clientHello.supportedCurves { + if config.supportsCurve(ka.version, c) { + curveID = c + break + } + } + + if curveID == 0 { + return nil, errors.New("tls: no supported elliptic curves offered") + } + if _, ok := curveForCurveID(curveID); !ok { + return nil, errors.New("tls: CurvePreferences includes unsupported curve") + } + + key, err := generateECDHEKey(config.rand(), curveID) + if err != nil { + return nil, err + } + ka.key = key + + // See RFC 4492, Section 5.4. + ecdhePublic := key.PublicKey().Bytes() + serverECDHEParams := make([]byte, 1+2+1+len(ecdhePublic)) + serverECDHEParams[0] = 3 // named curve + serverECDHEParams[1] = byte(curveID >> 8) + serverECDHEParams[2] = byte(curveID) + serverECDHEParams[3] = byte(len(ecdhePublic)) + copy(serverECDHEParams[4:], ecdhePublic) + + priv, ok := cert.PrivateKey.(crypto.Signer) + if !ok { + return nil, fmt.Errorf("tls: certificate private key of type %T does not implement crypto.Signer", cert.PrivateKey) + } + + var signatureAlgorithm SignatureScheme + var sigType uint8 + var sigHash crypto.Hash + if ka.version >= VersionTLS12 { + signatureAlgorithm, err = selectSignatureScheme(ka.version, cert, clientHello.supportedSignatureAlgorithms) + if err != nil { + return nil, err + } + sigType, sigHash, err = typeAndHashFromSignatureScheme(signatureAlgorithm) + if err != nil { + return nil, err + } + } else { + sigType, sigHash, err = legacyTypeAndHashFromPublicKey(priv.Public()) + if err != nil { + return nil, err + } + } + if (sigType == signaturePKCS1v15 || sigType == signatureRSAPSS) != ka.isRSA { + return nil, errors.New("tls: certificate cannot be used with the selected cipher suite") + } + + signed := hashForServerKeyExchange(sigType, sigHash, ka.version, clientHello.random, hello.random, serverECDHEParams) + + signOpts := crypto.SignerOpts(sigHash) + if sigType == signatureRSAPSS { + signOpts = &rsa.PSSOptions{SaltLength: rsa.PSSSaltLengthEqualsHash, Hash: sigHash} + } + sig, err := priv.Sign(config.rand(), signed, signOpts) + if err != nil { + return nil, errors.New("tls: failed to sign ECDHE parameters: " + err.Error()) + } + + skx := new(serverKeyExchangeMsg) + sigAndHashLen := 0 + if ka.version >= VersionTLS12 { + sigAndHashLen = 2 + } + skx.key = make([]byte, len(serverECDHEParams)+sigAndHashLen+2+len(sig)) + copy(skx.key, serverECDHEParams) + k := skx.key[len(serverECDHEParams):] + if ka.version >= VersionTLS12 { + k[0] = byte(signatureAlgorithm >> 8) + k[1] = byte(signatureAlgorithm) + k = k[2:] + } + k[0] = byte(len(sig) >> 8) + k[1] = byte(len(sig)) + copy(k[2:], sig) + + return skx, nil +} + +func (ka *ecdheKeyAgreement) processClientKeyExchange(config *Config, cert *Certificate, ckx *clientKeyExchangeMsg, version uint16) ([]byte, error) { + if len(ckx.ciphertext) == 0 || int(ckx.ciphertext[0]) != len(ckx.ciphertext)-1 { + return nil, errClientKeyExchange + } + + peerKey, err := ka.key.Curve().NewPublicKey(ckx.ciphertext[1:]) + if err != nil { + return nil, errClientKeyExchange + } + preMasterSecret, err := ka.key.ECDH(peerKey) + if err != nil { + return nil, errClientKeyExchange + } + + return preMasterSecret, nil +} + +func (ka *ecdheKeyAgreement) processServerKeyExchange(config *Config, clientHello *clientHelloMsg, serverHello *serverHelloMsg, cert *x509.Certificate, skx *serverKeyExchangeMsg) error { + if len(skx.key) < 4 { + return errServerKeyExchange + } + if skx.key[0] != 3 { // named curve + return errors.New("tls: server selected unsupported curve") + } + curveID := CurveID(skx.key[1])<<8 | CurveID(skx.key[2]) + + publicLen := int(skx.key[3]) + if publicLen+4 > len(skx.key) { + return errServerKeyExchange + } + serverECDHEParams := skx.key[:4+publicLen] + publicKey := serverECDHEParams[4:] + + sig := skx.key[4+publicLen:] + if len(sig) < 2 { + return errServerKeyExchange + } + + if _, ok := curveForCurveID(curveID); !ok { + return errors.New("tls: server selected unsupported curve") + } + + key, err := generateECDHEKey(config.rand(), curveID) + if err != nil { + return err + } + ka.key = key + + peerKey, err := key.Curve().NewPublicKey(publicKey) + if err != nil { + return errServerKeyExchange + } + ka.preMasterSecret, err = key.ECDH(peerKey) + if err != nil { + return errServerKeyExchange + } + + ourPublicKey := key.PublicKey().Bytes() + ka.ckx = new(clientKeyExchangeMsg) + ka.ckx.ciphertext = make([]byte, 1+len(ourPublicKey)) + ka.ckx.ciphertext[0] = byte(len(ourPublicKey)) + copy(ka.ckx.ciphertext[1:], ourPublicKey) + + var sigType uint8 + var sigHash crypto.Hash + if ka.version >= VersionTLS12 { + signatureAlgorithm := SignatureScheme(sig[0])<<8 | SignatureScheme(sig[1]) + sig = sig[2:] + if len(sig) < 2 { + return errServerKeyExchange + } + + if !isSupportedSignatureAlgorithm(signatureAlgorithm, clientHello.supportedSignatureAlgorithms) { + return errors.New("tls: certificate used with invalid signature algorithm") + } + sigType, sigHash, err = typeAndHashFromSignatureScheme(signatureAlgorithm) + if err != nil { + return err + } + } else { + sigType, sigHash, err = legacyTypeAndHashFromPublicKey(cert.PublicKey) + if err != nil { + return err + } + } + if (sigType == signaturePKCS1v15 || sigType == signatureRSAPSS) != ka.isRSA { + return errServerKeyExchange + } + + sigLen := int(sig[0])<<8 | int(sig[1]) + if sigLen+2 != len(sig) { + return errServerKeyExchange + } + sig = sig[2:] + + signed := hashForServerKeyExchange(sigType, sigHash, ka.version, clientHello.random, serverHello.random, serverECDHEParams) + if err := verifyHandshakeSignature(sigType, cert.PublicKey, sigHash, signed, sig); err != nil { + return errors.New("tls: invalid signature by the server certificate: " + err.Error()) + } + return nil +} + +func (ka *ecdheKeyAgreement) generateClientKeyExchange(config *Config, clientHello *clientHelloMsg, cert *x509.Certificate) ([]byte, *clientKeyExchangeMsg, error) { + if ka.ckx == nil { + return nil, nil, errors.New("tls: missing ServerKeyExchange message") + } + + return ka.preMasterSecret, ka.ckx, nil +} diff --git a/backend/vendor/github.com/refraction-networking/utls/key_schedule.go b/backend/vendor/github.com/refraction-networking/utls/key_schedule.go new file mode 100644 index 0000000..27e11b6 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/key_schedule.go @@ -0,0 +1,100 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto/ecdh" + "crypto/hmac" + "crypto/mlkem" + "errors" + "hash" + "io" + + "github.com/refraction-networking/utls/internal/tls13" +) + +// This file contains the functions necessary to compute the TLS 1.3 key +// schedule. See RFC 8446, Section 7. + +// nextTrafficSecret generates the next traffic secret, given the current one, +// according to RFC 8446, Section 7.2. +func (c *cipherSuiteTLS13) nextTrafficSecret(trafficSecret []byte) []byte { + return tls13.ExpandLabel(c.hash.New, trafficSecret, "traffic upd", nil, c.hash.Size()) +} + +// trafficKey generates traffic keys according to RFC 8446, Section 7.3. +func (c *cipherSuiteTLS13) trafficKey(trafficSecret []byte) (key, iv []byte) { + key = tls13.ExpandLabel(c.hash.New, trafficSecret, "key", nil, c.keyLen) + iv = tls13.ExpandLabel(c.hash.New, trafficSecret, "iv", nil, aeadNonceLength) + return +} + +// finishedHash generates the Finished verify_data or PskBinderEntry according +// to RFC 8446, Section 4.4.4. See sections 4.4 and 4.2.11.2 for the baseKey +// selection. +func (c *cipherSuiteTLS13) finishedHash(baseKey []byte, transcript hash.Hash) []byte { + finishedKey := tls13.ExpandLabel(c.hash.New, baseKey, "finished", nil, c.hash.Size()) + verifyData := hmac.New(c.hash.New, finishedKey) + verifyData.Write(transcript.Sum(nil)) + return verifyData.Sum(nil) +} + +// exportKeyingMaterial implements RFC5705 exporters for TLS 1.3 according to +// RFC 8446, Section 7.5. +func (c *cipherSuiteTLS13) exportKeyingMaterial(s *tls13.MasterSecret, transcript hash.Hash) func(string, []byte, int) ([]byte, error) { + expMasterSecret := s.ExporterMasterSecret(transcript) + return func(label string, context []byte, length int) ([]byte, error) { + return expMasterSecret.Exporter(label, context, length), nil + } +} + +type keySharePrivateKeys struct { + curveID CurveID + ecdhe *ecdh.PrivateKey + mlkem *mlkem.DecapsulationKey768 +} + +const x25519PublicKeySize = 32 + +// generateECDHEKey returns a PrivateKey that implements Diffie-Hellman +// according to RFC 8446, Section 4.2.8.2. +func generateECDHEKey(rand io.Reader, curveID CurveID) (*ecdh.PrivateKey, error) { + curve, ok := curveForCurveID(curveID) + if !ok { + return nil, errors.New("tls: internal error: unsupported curve") + } + + return curve.GenerateKey(rand) +} + +func curveForCurveID(id CurveID) (ecdh.Curve, bool) { + switch id { + case X25519: + return ecdh.X25519(), true + case CurveP256: + return ecdh.P256(), true + case CurveP384: + return ecdh.P384(), true + case CurveP521: + return ecdh.P521(), true + default: + return nil, false + } +} + +func curveIDForCurve(curve ecdh.Curve) (CurveID, bool) { + switch curve { + case ecdh.X25519(): + return X25519, true + case ecdh.P256(): + return CurveP256, true + case ecdh.P384(): + return CurveP384, true + case ecdh.P521(): + return CurveP521, true + default: + return 0, false + } +} diff --git a/backend/vendor/github.com/refraction-networking/utls/logo.png 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All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto" + "crypto/hmac" + "crypto/md5" + "crypto/sha1" + "crypto/sha256" + "crypto/sha512" + "errors" + "fmt" + "hash" + + "github.com/refraction-networking/utls/internal/tls12" +) + +type prfFunc func(secret []byte, label string, seed []byte, keyLen int) []byte + +// Split a premaster secret in two as specified in RFC 4346, Section 5. +func splitPreMasterSecret(secret []byte) (s1, s2 []byte) { + s1 = secret[0 : (len(secret)+1)/2] + s2 = secret[len(secret)/2:] + return +} + +// pHash implements the P_hash function, as defined in RFC 4346, Section 5. +func pHash(result, secret, seed []byte, hash func() hash.Hash) { + h := hmac.New(hash, secret) + h.Write(seed) + a := h.Sum(nil) + + j := 0 + for j < len(result) { + h.Reset() + h.Write(a) + h.Write(seed) + b := h.Sum(nil) + copy(result[j:], b) + j += len(b) + + h.Reset() + h.Write(a) + a = h.Sum(nil) + } +} + +// prf10 implements the TLS 1.0 pseudo-random function, as defined in RFC 2246, Section 5. +func prf10(secret []byte, label string, seed []byte, keyLen int) []byte { + result := make([]byte, keyLen) + hashSHA1 := sha1.New + hashMD5 := md5.New + + labelAndSeed := make([]byte, len(label)+len(seed)) + copy(labelAndSeed, label) + copy(labelAndSeed[len(label):], seed) + + s1, s2 := splitPreMasterSecret(secret) + pHash(result, s1, labelAndSeed, hashMD5) + result2 := make([]byte, len(result)) + pHash(result2, s2, labelAndSeed, hashSHA1) + + for i, b := range result2 { + result[i] ^= b + } + + return result +} + +// prf12 implements the TLS 1.2 pseudo-random function, as defined in RFC 5246, Section 5. +func prf12(hashFunc func() hash.Hash) prfFunc { + return func(secret []byte, label string, seed []byte, keyLen int) []byte { + return tls12.PRF(hashFunc, secret, label, seed, keyLen) + } +} + +const ( + masterSecretLength = 48 // Length of a master secret in TLS 1.1. + finishedVerifyLength = 12 // Length of verify_data in a Finished message. +) + +const masterSecretLabel = "master secret" +const extendedMasterSecretLabel = "extended master secret" +const keyExpansionLabel = "key expansion" +const clientFinishedLabel = "client finished" +const serverFinishedLabel = "server finished" + +func prfAndHashForVersion(version uint16, suite *cipherSuite) (prfFunc, crypto.Hash) { + switch version { + case VersionTLS10, VersionTLS11: + return prf10, crypto.Hash(0) + case VersionTLS12: + if suite.flags&suiteSHA384 != 0 { + return prf12(sha512.New384), crypto.SHA384 + } + return prf12(sha256.New), crypto.SHA256 + default: + panic("unknown version") + } +} + +func prfForVersion(version uint16, suite *cipherSuite) prfFunc { + prf, _ := prfAndHashForVersion(version, suite) + return prf +} + +// masterFromPreMasterSecret generates the master secret from the pre-master +// secret. See RFC 5246, Section 8.1. +func masterFromPreMasterSecret(version uint16, suite *cipherSuite, preMasterSecret, clientRandom, serverRandom []byte) []byte { + seed := make([]byte, 0, len(clientRandom)+len(serverRandom)) + seed = append(seed, clientRandom...) + seed = append(seed, serverRandom...) + + return prfForVersion(version, suite)(preMasterSecret, masterSecretLabel, seed, masterSecretLength) +} + +// extMasterFromPreMasterSecret generates the extended master secret from the +// pre-master secret. See RFC 7627. +func extMasterFromPreMasterSecret(version uint16, suite *cipherSuite, preMasterSecret, transcript []byte) []byte { + prf, hash := prfAndHashForVersion(version, suite) + if version == VersionTLS12 { + // Use the FIPS 140-3 module only for TLS 1.2 with EMS, which is the + // only TLS 1.0-1.2 approved mode per IG D.Q. + return tls12.MasterSecret(hash.New, preMasterSecret, transcript) + } + return prf(preMasterSecret, extendedMasterSecretLabel, transcript, masterSecretLength) +} + +// keysFromMasterSecret generates the connection keys from the master +// secret, given the lengths of the MAC key, cipher key and IV, as defined in +// RFC 2246, Section 6.3. +func keysFromMasterSecret(version uint16, suite *cipherSuite, masterSecret, clientRandom, serverRandom []byte, macLen, keyLen, ivLen int) (clientMAC, serverMAC, clientKey, serverKey, clientIV, serverIV []byte) { + seed := make([]byte, 0, len(serverRandom)+len(clientRandom)) + seed = append(seed, serverRandom...) + seed = append(seed, clientRandom...) + + n := 2*macLen + 2*keyLen + 2*ivLen + keyMaterial := prfForVersion(version, suite)(masterSecret, keyExpansionLabel, seed, n) + clientMAC = keyMaterial[:macLen] + keyMaterial = keyMaterial[macLen:] + serverMAC = keyMaterial[:macLen] + keyMaterial = keyMaterial[macLen:] + clientKey = keyMaterial[:keyLen] + keyMaterial = keyMaterial[keyLen:] + serverKey = keyMaterial[:keyLen] + keyMaterial = keyMaterial[keyLen:] + clientIV = keyMaterial[:ivLen] + keyMaterial = keyMaterial[ivLen:] + serverIV = keyMaterial[:ivLen] + return +} + +func newFinishedHash(version uint16, cipherSuite *cipherSuite) finishedHash { + var buffer []byte + if version >= VersionTLS12 { + buffer = []byte{} + } + + prf, hash := prfAndHashForVersion(version, cipherSuite) + if hash != 0 { + return finishedHash{hash.New(), hash.New(), nil, nil, buffer, version, prf} + } + + return finishedHash{sha1.New(), sha1.New(), md5.New(), md5.New(), buffer, version, prf} +} + +// A finishedHash calculates the hash of a set of handshake messages suitable +// for including in a Finished message. +type finishedHash struct { + client hash.Hash + server hash.Hash + + // Prior to TLS 1.2, an additional MD5 hash is required. + clientMD5 hash.Hash + serverMD5 hash.Hash + + // In TLS 1.2, a full buffer is sadly required. + buffer []byte + + version uint16 + prf prfFunc +} + +func (h *finishedHash) Write(msg []byte) (n int, err error) { + h.client.Write(msg) + h.server.Write(msg) + + if h.version < VersionTLS12 { + h.clientMD5.Write(msg) + h.serverMD5.Write(msg) + } + + if h.buffer != nil { + h.buffer = append(h.buffer, msg...) + } + + return len(msg), nil +} + +func (h finishedHash) Sum() []byte { + if h.version >= VersionTLS12 { + return h.client.Sum(nil) + } + + out := make([]byte, 0, md5.Size+sha1.Size) + out = h.clientMD5.Sum(out) + return h.client.Sum(out) +} + +// clientSum returns the contents of the verify_data member of a client's +// Finished message. +func (h finishedHash) clientSum(masterSecret []byte) []byte { + return h.prf(masterSecret, clientFinishedLabel, h.Sum(), finishedVerifyLength) +} + +// serverSum returns the contents of the verify_data member of a server's +// Finished message. +func (h finishedHash) serverSum(masterSecret []byte) []byte { + return h.prf(masterSecret, serverFinishedLabel, h.Sum(), finishedVerifyLength) +} + +// hashForClientCertificate returns the handshake messages so far, pre-hashed if +// necessary, suitable for signing by a TLS client certificate. +func (h finishedHash) hashForClientCertificate(sigType uint8, hashAlg crypto.Hash) []byte { + if (h.version >= VersionTLS12 || sigType == signatureEd25519 || circlSchemeBySigType(sigType) != nil) && h.buffer == nil { // [UTLS] ported from cloudflare/go + panic("tls: handshake hash for a client certificate requested after discarding the handshake buffer") + } + + if sigType == signatureEd25519 || circlSchemeBySigType(sigType) != nil { // [UTLS] ported from cloudflare/go + return h.buffer + } + + if h.version >= VersionTLS12 { + hash := hashAlg.New() + hash.Write(h.buffer) + return hash.Sum(nil) + } + + if sigType == signatureECDSA { + return h.server.Sum(nil) + } + + return h.Sum() +} + +// discardHandshakeBuffer is called when there is no more need to +// buffer the entirety of the handshake messages. +func (h *finishedHash) discardHandshakeBuffer() { + h.buffer = nil +} + +// noEKMBecauseRenegotiation is used as a value of +// ConnectionState.ekm when renegotiation is enabled and thus +// we wish to fail all key-material export requests. +func noEKMBecauseRenegotiation(label string, context []byte, length int) ([]byte, error) { + return nil, errors.New("crypto/tls: ExportKeyingMaterial is unavailable when renegotiation is enabled") +} + +// noEKMBecauseNoEMS is used as a value of ConnectionState.ekm when Extended +// Master Secret is not negotiated and thus we wish to fail all key-material +// export requests. +func noEKMBecauseNoEMS(label string, context []byte, length int) ([]byte, error) { + return nil, errors.New("crypto/tls: ExportKeyingMaterial is unavailable when neither TLS 1.3 nor Extended Master Secret are negotiated; override with GODEBUG=tlsunsafeekm=1") +} + +// ekmFromMasterSecret generates exported keying material as defined in RFC 5705. +func ekmFromMasterSecret(version uint16, suite *cipherSuite, masterSecret, clientRandom, serverRandom []byte) func(string, []byte, int) ([]byte, error) { + return func(label string, context []byte, length int) ([]byte, error) { + switch label { + case "client finished", "server finished", "master secret", "key expansion": + // These values are reserved and may not be used. + return nil, fmt.Errorf("crypto/tls: reserved ExportKeyingMaterial label: %s", label) + } + + seedLen := len(serverRandom) + len(clientRandom) + if context != nil { + seedLen += 2 + len(context) + } + seed := make([]byte, 0, seedLen) + + seed = append(seed, clientRandom...) + seed = append(seed, serverRandom...) + + if context != nil { + if len(context) >= 1<<16 { + return nil, fmt.Errorf("crypto/tls: ExportKeyingMaterial context too long") + } + seed = append(seed, byte(len(context)>>8), byte(len(context))) + seed = append(seed, context...) + } + + return prfForVersion(version, suite)(masterSecret, label, seed, length), nil + } +} diff --git a/backend/vendor/github.com/refraction-networking/utls/quic.go b/backend/vendor/github.com/refraction-networking/utls/quic.go new file mode 100644 index 0000000..ba8a235 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/quic.go @@ -0,0 +1,500 @@ +// Copyright 2023 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "context" + "errors" + "fmt" +) + +// QUICEncryptionLevel represents a QUIC encryption level used to transmit +// handshake messages. +type QUICEncryptionLevel int + +const ( + QUICEncryptionLevelInitial = QUICEncryptionLevel(iota) + QUICEncryptionLevelEarly + QUICEncryptionLevelHandshake + QUICEncryptionLevelApplication +) + +func (l QUICEncryptionLevel) String() string { + switch l { + case QUICEncryptionLevelInitial: + return "Initial" + case QUICEncryptionLevelEarly: + return "Early" + case QUICEncryptionLevelHandshake: + return "Handshake" + case QUICEncryptionLevelApplication: + return "Application" + default: + return fmt.Sprintf("QUICEncryptionLevel(%v)", int(l)) + } +} + +// A QUICConn represents a connection which uses a QUIC implementation as the underlying +// transport as described in RFC 9001. +// +// Methods of QUICConn are not safe for concurrent use. +type QUICConn struct { + conn *Conn + + sessionTicketSent bool +} + +// A QUICConfig configures a [QUICConn]. +type QUICConfig struct { + TLSConfig *Config + + // EnableSessionEvents may be set to true to enable the + // [QUICStoreSession] and [QUICResumeSession] events for client connections. + // When this event is enabled, sessions are not automatically + // stored in the client session cache. + // The application should use [QUICConn.StoreSession] to store sessions. + EnableSessionEvents bool +} + +// A QUICEventKind is a type of operation on a QUIC connection. +type QUICEventKind int + +const ( + // QUICNoEvent indicates that there are no events available. + QUICNoEvent QUICEventKind = iota + + // QUICSetReadSecret and QUICSetWriteSecret provide the read and write + // secrets for a given encryption level. + // QUICEvent.Level, QUICEvent.Data, and QUICEvent.Suite are set. + // + // Secrets for the Initial encryption level are derived from the initial + // destination connection ID, and are not provided by the QUICConn. + QUICSetReadSecret + QUICSetWriteSecret + + // QUICWriteData provides data to send to the peer in CRYPTO frames. + // QUICEvent.Data is set. + QUICWriteData + + // QUICTransportParameters provides the peer's QUIC transport parameters. + // QUICEvent.Data is set. + QUICTransportParameters + + // QUICTransportParametersRequired indicates that the caller must provide + // QUIC transport parameters to send to the peer. The caller should set + // the transport parameters with QUICConn.SetTransportParameters and call + // QUICConn.NextEvent again. + // + // If transport parameters are set before calling QUICConn.Start, the + // connection will never generate a QUICTransportParametersRequired event. + QUICTransportParametersRequired + + // QUICRejectedEarlyData indicates that the server rejected 0-RTT data even + // if we offered it. It's returned before QUICEncryptionLevelApplication + // keys are returned. + // This event only occurs on client connections. + QUICRejectedEarlyData + + // QUICHandshakeDone indicates that the TLS handshake has completed. + QUICHandshakeDone + + // QUICResumeSession indicates that a client is attempting to resume a previous session. + // [QUICEvent.SessionState] is set. + // + // For client connections, this event occurs when the session ticket is selected. + // For server connections, this event occurs when receiving the client's session ticket. + // + // The application may set [QUICEvent.SessionState.EarlyData] to false before the + // next call to [QUICConn.NextEvent] to decline 0-RTT even if the session supports it. + QUICResumeSession + + // QUICStoreSession indicates that the server has provided state permitting + // the client to resume the session. + // [QUICEvent.SessionState] is set. + // The application should use [QUICConn.StoreSession] session to store the [SessionState]. + // The application may modify the [SessionState] before storing it. + // This event only occurs on client connections. + QUICStoreSession +) + +// A QUICEvent is an event occurring on a QUIC connection. +// +// The type of event is specified by the Kind field. +// The contents of the other fields are kind-specific. +type QUICEvent struct { + Kind QUICEventKind + + // Set for QUICSetReadSecret, QUICSetWriteSecret, and QUICWriteData. + Level QUICEncryptionLevel + + // Set for QUICTransportParameters, QUICSetReadSecret, QUICSetWriteSecret, and QUICWriteData. + // The contents are owned by crypto/tls, and are valid until the next NextEvent call. + Data []byte + + // Set for QUICSetReadSecret and QUICSetWriteSecret. + Suite uint16 + + // Set for QUICResumeSession and QUICStoreSession. + SessionState *SessionState +} + +type quicState struct { + events []QUICEvent + nextEvent int + + // eventArr is a statically allocated event array, large enough to handle + // the usual maximum number of events resulting from a single call: transport + // parameters, Initial data, Early read secret, Handshake write and read + // secrets, Handshake data, Application write secret, Application data. + eventArr [8]QUICEvent + + started bool + signalc chan struct{} // handshake data is available to be read + blockedc chan struct{} // handshake is waiting for data, closed when done + cancelc <-chan struct{} // handshake has been canceled + cancel context.CancelFunc + + waitingForDrain bool + + // readbuf is shared between HandleData and the handshake goroutine. + // HandshakeCryptoData passes ownership to the handshake goroutine by + // reading from signalc, and reclaims ownership by reading from blockedc. + readbuf []byte + + transportParams []byte // to send to the peer + + enableSessionEvents bool +} + +// QUICClient returns a new TLS client side connection using QUICTransport as the +// underlying transport. The config cannot be nil. +// +// The config's MinVersion must be at least TLS 1.3. +func QUICClient(config *QUICConfig) *QUICConn { + return newQUICConn(Client(nil, config.TLSConfig), config) +} + +// QUICServer returns a new TLS server side connection using QUICTransport as the +// underlying transport. The config cannot be nil. +// +// The config's MinVersion must be at least TLS 1.3. +func QUICServer(config *QUICConfig) *QUICConn { + return newQUICConn(Server(nil, config.TLSConfig), config) +} + +func newQUICConn(conn *Conn, config *QUICConfig) *QUICConn { + conn.quic = &quicState{ + signalc: make(chan struct{}), + blockedc: make(chan struct{}), + enableSessionEvents: config.EnableSessionEvents, + } + conn.quic.events = conn.quic.eventArr[:0] + return &QUICConn{ + conn: conn, + } +} + +// Start starts the client or server handshake protocol. +// It may produce connection events, which may be read with [QUICConn.NextEvent]. +// +// Start must be called at most once. +func (q *QUICConn) Start(ctx context.Context) error { + if q.conn.quic.started { + return quicError(errors.New("tls: Start called more than once")) + } + q.conn.quic.started = true + if q.conn.config.MinVersion < VersionTLS13 { + return quicError(errors.New("tls: Config MinVersion must be at least TLS 1.3")) + } + go q.conn.HandshakeContext(ctx) + if _, ok := <-q.conn.quic.blockedc; !ok { + return q.conn.handshakeErr + } + return nil +} + +// NextEvent returns the next event occurring on the connection. +// It returns an event with a Kind of [QUICNoEvent] when no events are available. +func (q *QUICConn) NextEvent() QUICEvent { + qs := q.conn.quic + if last := qs.nextEvent - 1; last >= 0 && len(qs.events[last].Data) > 0 { + // Write over some of the previous event's data, + // to catch callers erroniously retaining it. + qs.events[last].Data[0] = 0 + } + if qs.nextEvent >= len(qs.events) && qs.waitingForDrain { + qs.waitingForDrain = false + <-qs.signalc + <-qs.blockedc + } + if qs.nextEvent >= len(qs.events) { + qs.events = qs.events[:0] + qs.nextEvent = 0 + return QUICEvent{Kind: QUICNoEvent} + } + e := qs.events[qs.nextEvent] + qs.events[qs.nextEvent] = QUICEvent{} // zero out references to data + qs.nextEvent++ + return e +} + +// Close closes the connection and stops any in-progress handshake. +func (q *QUICConn) Close() error { + if q.conn.quic.cancel == nil { + return nil // never started + } + q.conn.quic.cancel() + for range q.conn.quic.blockedc { + // Wait for the handshake goroutine to return. + } + return q.conn.handshakeErr +} + +// HandleData handles handshake bytes received from the peer. +// It may produce connection events, which may be read with [QUICConn.NextEvent]. +func (q *QUICConn) HandleData(level QUICEncryptionLevel, data []byte) error { + c := q.conn + if c.in.level != level { + return quicError(c.in.setErrorLocked(errors.New("tls: handshake data received at wrong level"))) + } + c.quic.readbuf = data + <-c.quic.signalc + _, ok := <-c.quic.blockedc + if ok { + // The handshake goroutine is waiting for more data. + return nil + } + // The handshake goroutine has exited. + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + c.hand.Write(c.quic.readbuf) + c.quic.readbuf = nil + for q.conn.hand.Len() >= 4 && q.conn.handshakeErr == nil { + b := q.conn.hand.Bytes() + n := int(b[1])<<16 | int(b[2])<<8 | int(b[3]) + if n > maxHandshake { + q.conn.handshakeErr = fmt.Errorf("tls: handshake message of length %d bytes exceeds maximum of %d bytes", n, maxHandshake) + break + } + if len(b) < 4+n { + return nil + } + if err := q.conn.handlePostHandshakeMessage(); err != nil { + q.conn.handshakeErr = err + } + } + if q.conn.handshakeErr != nil { + return quicError(q.conn.handshakeErr) + } + return nil +} + +type QUICSessionTicketOptions struct { + // EarlyData specifies whether the ticket may be used for 0-RTT. + EarlyData bool + Extra [][]byte +} + +// SendSessionTicket sends a session ticket to the client. +// It produces connection events, which may be read with [QUICConn.NextEvent]. +// Currently, it can only be called once. +func (q *QUICConn) SendSessionTicket(opts QUICSessionTicketOptions) error { + c := q.conn + if !c.isHandshakeComplete.Load() { + return quicError(errors.New("tls: SendSessionTicket called before handshake completed")) + } + if c.isClient { + return quicError(errors.New("tls: SendSessionTicket called on the client")) + } + if q.sessionTicketSent { + return quicError(errors.New("tls: SendSessionTicket called multiple times")) + } + q.sessionTicketSent = true + return quicError(c.sendSessionTicket(opts.EarlyData, opts.Extra)) +} + +// StoreSession stores a session previously received in a QUICStoreSession event +// in the ClientSessionCache. +// The application may process additional events or modify the SessionState +// before storing the session. +func (q *QUICConn) StoreSession(session *SessionState) error { + c := q.conn + if !c.isClient { + return quicError(errors.New("tls: StoreSessionTicket called on the server")) + } + cacheKey := c.clientSessionCacheKey() + if cacheKey == "" { + return nil + } + cs := &ClientSessionState{session: session} + c.config.ClientSessionCache.Put(cacheKey, cs) + return nil +} + +// ConnectionState returns basic TLS details about the connection. +func (q *QUICConn) ConnectionState() ConnectionState { + return q.conn.ConnectionState() +} + +// SetTransportParameters sets the transport parameters to send to the peer. +// +// Server connections may delay setting the transport parameters until after +// receiving the client's transport parameters. See [QUICTransportParametersRequired]. +func (q *QUICConn) SetTransportParameters(params []byte) { + if params == nil { + params = []byte{} + } + q.conn.quic.transportParams = params + if q.conn.quic.started { + <-q.conn.quic.signalc + <-q.conn.quic.blockedc + } +} + +// quicError ensures err is an AlertError. +// If err is not already, quicError wraps it with alertInternalError. +func quicError(err error) error { + if err == nil { + return nil + } + var ae AlertError + if errors.As(err, &ae) { + return err + } + var a alert + if !errors.As(err, &a) { + a = alertInternalError + } + // Return an error wrapping the original error and an AlertError. + // Truncate the text of the alert to 0 characters. + return fmt.Errorf("%w%.0w", err, AlertError(a)) +} + +func (c *Conn) quicReadHandshakeBytes(n int) error { + for c.hand.Len() < n { + if err := c.quicWaitForSignal(); err != nil { + return err + } + } + return nil +} + +func (c *Conn) quicSetReadSecret(level QUICEncryptionLevel, suite uint16, secret []byte) { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICSetReadSecret, + Level: level, + Suite: suite, + Data: secret, + }) +} + +func (c *Conn) quicSetWriteSecret(level QUICEncryptionLevel, suite uint16, secret []byte) { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICSetWriteSecret, + Level: level, + Suite: suite, + Data: secret, + }) +} + +func (c *Conn) quicWriteCryptoData(level QUICEncryptionLevel, data []byte) { + var last *QUICEvent + if len(c.quic.events) > 0 { + last = &c.quic.events[len(c.quic.events)-1] + } + if last == nil || last.Kind != QUICWriteData || last.Level != level { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICWriteData, + Level: level, + }) + last = &c.quic.events[len(c.quic.events)-1] + } + last.Data = append(last.Data, data...) +} + +func (c *Conn) quicResumeSession(session *SessionState) error { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICResumeSession, + SessionState: session, + }) + c.quic.waitingForDrain = true + for c.quic.waitingForDrain { + if err := c.quicWaitForSignal(); err != nil { + return err + } + } + return nil +} + +func (c *Conn) quicStoreSession(session *SessionState) { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICStoreSession, + SessionState: session, + }) +} + +func (c *Conn) quicSetTransportParameters(params []byte) { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICTransportParameters, + Data: params, + }) +} + +func (c *Conn) quicGetTransportParameters() ([]byte, error) { + if c.quic.transportParams == nil { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICTransportParametersRequired, + }) + } + for c.quic.transportParams == nil { + if err := c.quicWaitForSignal(); err != nil { + return nil, err + } + } + return c.quic.transportParams, nil +} + +func (c *Conn) quicHandshakeComplete() { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICHandshakeDone, + }) +} + +func (c *Conn) quicRejectedEarlyData() { + c.quic.events = append(c.quic.events, QUICEvent{ + Kind: QUICRejectedEarlyData, + }) +} + +// quicWaitForSignal notifies the QUICConn that handshake progress is blocked, +// and waits for a signal that the handshake should proceed. +// +// The handshake may become blocked waiting for handshake bytes +// or for the user to provide transport parameters. +func (c *Conn) quicWaitForSignal() error { + // Drop the handshake mutex while blocked to allow the user + // to call ConnectionState before the handshake completes. + c.handshakeMutex.Unlock() + defer c.handshakeMutex.Lock() + // Send on blockedc to notify the QUICConn that the handshake is blocked. + // Exported methods of QUICConn wait for the handshake to become blocked + // before returning to the user. + select { + case c.quic.blockedc <- struct{}{}: + case <-c.quic.cancelc: + return c.sendAlertLocked(alertCloseNotify) + } + // The QUICConn reads from signalc to notify us that the handshake may + // be able to proceed. (The QUICConn reads, because we close signalc to + // indicate that the handshake has completed.) + select { + case c.quic.signalc <- struct{}{}: + c.hand.Write(c.quic.readbuf) + c.quic.readbuf = nil + case <-c.quic.cancelc: + return c.sendAlertLocked(alertCloseNotify) + } + return nil +} diff --git a/backend/vendor/github.com/refraction-networking/utls/ticket.go b/backend/vendor/github.com/refraction-networking/utls/ticket.go new file mode 100644 index 0000000..4bd263e --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/ticket.go @@ -0,0 +1,441 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto/aes" + "crypto/cipher" + "crypto/hmac" + "crypto/sha256" + "crypto/subtle" + "crypto/x509" + "errors" + "io" + + "golang.org/x/crypto/cryptobyte" +) + +// A SessionState is a resumable session. +type SessionState struct { + // Encoded as a SessionState (in the language of RFC 8446, Section 3). + // + // enum { server(1), client(2) } SessionStateType; + // + // opaque Certificate<1..2^24-1>; + // + // Certificate CertificateChain<0..2^24-1>; + // + // opaque Extra<0..2^24-1>; + // + // struct { + // uint16 version; + // SessionStateType type; + // uint16 cipher_suite; + // uint64 created_at; + // opaque secret<1..2^8-1>; + // Extra extra<0..2^24-1>; + // uint8 ext_master_secret = { 0, 1 }; + // uint8 early_data = { 0, 1 }; + // CertificateEntry certificate_list<0..2^24-1>; + // CertificateChain verified_chains<0..2^24-1>; /* excluding leaf */ + // select (SessionState.early_data) { + // case 0: Empty; + // case 1: opaque alpn<1..2^8-1>; + // }; + // select (SessionState.type) { + // case server: Empty; + // case client: struct { + // select (SessionState.version) { + // case VersionTLS10..VersionTLS12: Empty; + // case VersionTLS13: struct { + // uint64 use_by; + // uint32 age_add; + // }; + // }; + // }; + // }; + // } SessionState; + // + + // Extra is ignored by crypto/tls, but is encoded by [SessionState.Bytes] + // and parsed by [ParseSessionState]. + // + // This allows [Config.UnwrapSession]/[Config.WrapSession] and + // [ClientSessionCache] implementations to store and retrieve additional + // data alongside this session. + // + // To allow different layers in a protocol stack to share this field, + // applications must only append to it, not replace it, and must use entries + // that can be recognized even if out of order (for example, by starting + // with an id and version prefix). + Extra [][]byte + + // EarlyData indicates whether the ticket can be used for 0-RTT in a QUIC + // connection. The application may set this to false if it is true to + // decline to offer 0-RTT even if supported. + EarlyData bool + + version uint16 + isClient bool + cipherSuite uint16 + // createdAt is the generation time of the secret on the sever (which for + // TLS 1.0–1.2 might be earlier than the current session) and the time at + // which the ticket was received on the client. + createdAt uint64 // seconds since UNIX epoch + secret []byte // master secret for TLS 1.2, or the PSK for TLS 1.3 + extMasterSecret bool + peerCertificates []*x509.Certificate + activeCertHandles []*activeCert + ocspResponse []byte + scts [][]byte + verifiedChains [][]*x509.Certificate + alpnProtocol string // only set if EarlyData is true + + // Client-side TLS 1.3-only fields. + useBy uint64 // seconds since UNIX epoch + ageAdd uint32 + ticket []byte +} + +// Bytes encodes the session, including any private fields, so that it can be +// parsed by [ParseSessionState]. The encoding contains secret values critical +// to the security of future and possibly past sessions. +// +// The specific encoding should be considered opaque and may change incompatibly +// between Go versions. +func (s *SessionState) Bytes() ([]byte, error) { + var b cryptobyte.Builder + b.AddUint16(s.version) + if s.isClient { + b.AddUint8(2) // client + } else { + b.AddUint8(1) // server + } + b.AddUint16(s.cipherSuite) + addUint64(&b, s.createdAt) + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(s.secret) + }) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + for _, extra := range s.Extra { + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(extra) + }) + } + }) + if s.extMasterSecret { + b.AddUint8(1) + } else { + b.AddUint8(0) + } + if s.EarlyData { + b.AddUint8(1) + } else { + b.AddUint8(0) + } + marshalCertificate(&b, Certificate{ + Certificate: certificatesToBytesSlice(s.peerCertificates), + OCSPStaple: s.ocspResponse, + SignedCertificateTimestamps: s.scts, + }) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + for _, chain := range s.verifiedChains { + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + // We elide the first certificate because it's always the leaf. + if len(chain) == 0 { + b.SetError(errors.New("tls: internal error: empty verified chain")) + return + } + for _, cert := range chain[1:] { + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(cert.Raw) + }) + } + }) + } + }) + if s.EarlyData { + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes([]byte(s.alpnProtocol)) + }) + } + if s.isClient { + if s.version >= VersionTLS13 { + addUint64(&b, s.useBy) + b.AddUint32(s.ageAdd) + } + } + return b.Bytes() +} + +func certificatesToBytesSlice(certs []*x509.Certificate) [][]byte { + s := make([][]byte, 0, len(certs)) + for _, c := range certs { + s = append(s, c.Raw) + } + return s +} + +// ParseSessionState parses a [SessionState] encoded by [SessionState.Bytes]. +func ParseSessionState(data []byte) (*SessionState, error) { + ss := &SessionState{} + s := cryptobyte.String(data) + var typ, extMasterSecret, earlyData uint8 + var cert Certificate + var extra cryptobyte.String + if !s.ReadUint16(&ss.version) || + !s.ReadUint8(&typ) || + (typ != 1 && typ != 2) || + !s.ReadUint16(&ss.cipherSuite) || + !readUint64(&s, &ss.createdAt) || + !readUint8LengthPrefixed(&s, &ss.secret) || + !s.ReadUint24LengthPrefixed(&extra) || + !s.ReadUint8(&extMasterSecret) || + !s.ReadUint8(&earlyData) || + len(ss.secret) == 0 || + !unmarshalCertificate(&s, &cert) { + return nil, errors.New("tls: invalid session encoding") + } + for !extra.Empty() { + var e []byte + if !readUint24LengthPrefixed(&extra, &e) { + return nil, errors.New("tls: invalid session encoding") + } + ss.Extra = append(ss.Extra, e) + } + switch extMasterSecret { + case 0: + ss.extMasterSecret = false + case 1: + ss.extMasterSecret = true + default: + return nil, errors.New("tls: invalid session encoding") + } + switch earlyData { + case 0: + ss.EarlyData = false + case 1: + ss.EarlyData = true + default: + return nil, errors.New("tls: invalid session encoding") + } + for _, cert := range cert.Certificate { + c, err := globalCertCache.newCert(cert) + if err != nil { + return nil, err + } + ss.activeCertHandles = append(ss.activeCertHandles, c) + ss.peerCertificates = append(ss.peerCertificates, c.cert) + } + ss.ocspResponse = cert.OCSPStaple + ss.scts = cert.SignedCertificateTimestamps + var chainList cryptobyte.String + if !s.ReadUint24LengthPrefixed(&chainList) { + return nil, errors.New("tls: invalid session encoding") + } + for !chainList.Empty() { + var certList cryptobyte.String + if !chainList.ReadUint24LengthPrefixed(&certList) { + return nil, errors.New("tls: invalid session encoding") + } + var chain []*x509.Certificate + if len(ss.peerCertificates) == 0 { + return nil, errors.New("tls: invalid session encoding") + } + chain = append(chain, ss.peerCertificates[0]) + for !certList.Empty() { + var cert []byte + if !readUint24LengthPrefixed(&certList, &cert) { + return nil, errors.New("tls: invalid session encoding") + } + c, err := globalCertCache.newCert(cert) + if err != nil { + return nil, err + } + ss.activeCertHandles = append(ss.activeCertHandles, c) + chain = append(chain, c.cert) + } + ss.verifiedChains = append(ss.verifiedChains, chain) + } + if ss.EarlyData { + var alpn []byte + if !readUint8LengthPrefixed(&s, &alpn) { + return nil, errors.New("tls: invalid session encoding") + } + ss.alpnProtocol = string(alpn) + } + if isClient := typ == 2; !isClient { + if !s.Empty() { + return nil, errors.New("tls: invalid session encoding") + } + return ss, nil + } + ss.isClient = true + if len(ss.peerCertificates) == 0 { + return nil, errors.New("tls: no server certificates in client session") + } + if ss.version < VersionTLS13 { + if !s.Empty() { + return nil, errors.New("tls: invalid session encoding") + } + return ss, nil + } + if !s.ReadUint64(&ss.useBy) || !s.ReadUint32(&ss.ageAdd) || !s.Empty() { + return nil, errors.New("tls: invalid session encoding") + } + return ss, nil +} + +// sessionState returns a partially filled-out [SessionState] with information +// from the current connection. +func (c *Conn) sessionState() *SessionState { + return &SessionState{ + version: c.vers, + cipherSuite: c.cipherSuite, + createdAt: uint64(c.config.time().Unix()), + alpnProtocol: c.clientProtocol, + peerCertificates: c.peerCertificates, + activeCertHandles: c.activeCertHandles, + ocspResponse: c.ocspResponse, + scts: c.scts, + isClient: c.isClient, + extMasterSecret: c.extMasterSecret, + verifiedChains: c.verifiedChains, + } +} + +// EncryptTicket encrypts a ticket with the [Config]'s configured (or default) +// session ticket keys. It can be used as a [Config.WrapSession] implementation. +func (c *Config) EncryptTicket(cs ConnectionState, ss *SessionState) ([]byte, error) { + ticketKeys := c.ticketKeys(nil) + stateBytes, err := ss.Bytes() + if err != nil { + return nil, err + } + return c.encryptTicket(stateBytes, ticketKeys) +} + +func (c *Config) encryptTicket(state []byte, ticketKeys []ticketKey) ([]byte, error) { + if len(ticketKeys) == 0 { + return nil, errors.New("tls: internal error: session ticket keys unavailable") + } + + encrypted := make([]byte, aes.BlockSize+len(state)+sha256.Size) + iv := encrypted[:aes.BlockSize] + ciphertext := encrypted[aes.BlockSize : len(encrypted)-sha256.Size] + authenticated := encrypted[:len(encrypted)-sha256.Size] + macBytes := encrypted[len(encrypted)-sha256.Size:] + + if _, err := io.ReadFull(c.rand(), iv); err != nil { + return nil, err + } + key := ticketKeys[0] + block, err := aes.NewCipher(key.aesKey[:]) + if err != nil { + return nil, errors.New("tls: failed to create cipher while encrypting ticket: " + err.Error()) + } + cipher.NewCTR(block, iv).XORKeyStream(ciphertext, state) + + mac := hmac.New(sha256.New, key.hmacKey[:]) + mac.Write(authenticated) + mac.Sum(macBytes[:0]) + + return encrypted, nil +} + +// DecryptTicket decrypts a ticket encrypted by [Config.EncryptTicket]. It can +// be used as a [Config.UnwrapSession] implementation. +// +// If the ticket can't be decrypted or parsed, DecryptTicket returns (nil, nil). +func (c *Config) DecryptTicket(identity []byte, cs ConnectionState) (*SessionState, error) { + ticketKeys := c.ticketKeys(nil) + stateBytes := c.decryptTicket(identity, ticketKeys) + if stateBytes == nil { + return nil, nil + } + s, err := ParseSessionState(stateBytes) + if err != nil { + return nil, nil // drop unparsable tickets on the floor + } + return s, nil +} + +func (c *Config) decryptTicket(encrypted []byte, ticketKeys []ticketKey) []byte { + if len(encrypted) < aes.BlockSize+sha256.Size { + return nil + } + + iv := encrypted[:aes.BlockSize] + ciphertext := encrypted[aes.BlockSize : len(encrypted)-sha256.Size] + authenticated := encrypted[:len(encrypted)-sha256.Size] + macBytes := encrypted[len(encrypted)-sha256.Size:] + + for _, key := range ticketKeys { + mac := hmac.New(sha256.New, key.hmacKey[:]) + mac.Write(authenticated) + expected := mac.Sum(nil) + + if subtle.ConstantTimeCompare(macBytes, expected) != 1 { + continue + } + + block, err := aes.NewCipher(key.aesKey[:]) + if err != nil { + return nil + } + plaintext := make([]byte, len(ciphertext)) + cipher.NewCTR(block, iv).XORKeyStream(plaintext, ciphertext) + + return plaintext + } + + return nil +} + +// ClientSessionState contains the state needed by a client to +// resume a previous TLS session. +type ClientSessionState struct { + session *SessionState +} + +// ResumptionState returns the session ticket sent by the server (also known as +// the session's identity) and the state necessary to resume this session. +// +// It can be called by [ClientSessionCache.Put] to serialize (with +// [SessionState.Bytes]) and store the session. +func (cs *ClientSessionState) ResumptionState() (ticket []byte, state *SessionState, err error) { + if cs == nil || cs.session == nil { + return nil, nil, nil + } + return cs.session.ticket, cs.session, nil +} + +// NewResumptionState returns a state value that can be returned by +// [ClientSessionCache.Get] to resume a previous session. +// +// state needs to be returned by [ParseSessionState], and the ticket and session +// state must have been returned by [ClientSessionState.ResumptionState]. +func NewResumptionState(ticket []byte, state *SessionState) (*ClientSessionState, error) { + state.ticket = ticket + return &ClientSessionState{ + session: state, + }, nil +} + +// // DecryptTicketWith decrypts an encrypted session ticket +// // using a TicketKeys (ie []TicketKey) struct +// // +// // usedOldKey will be true if the key used for decryption is +// // not the first in the []TicketKey slice +// // +// // [uTLS] changed to be made public and take a TicketKeys and use a fake conn receiver +// func DecryptTicketWith(encrypted []byte, tks TicketKeys) (plaintext []byte, usedOldKey bool) { +// // create fake conn +// c := &Conn{ +// ticketKeys: tks.ToPrivate(), +// } + +// return c.decryptTicket(encrypted) +// } diff --git a/backend/vendor/github.com/refraction-networking/utls/tls.go b/backend/vendor/github.com/refraction-networking/utls/tls.go new file mode 100644 index 0000000..051108f --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/tls.go @@ -0,0 +1,389 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package tls partially implements TLS 1.2, as specified in RFC 5246, +// and TLS 1.3, as specified in RFC 8446. +package tls + +// BUG(agl): The crypto/tls package only implements some countermeasures +// against Lucky13 attacks on CBC-mode encryption, and only on SHA1 +// variants. See http://www.isg.rhul.ac.uk/tls/TLStiming.pdf and +// https://www.imperialviolet.org/2013/02/04/luckythirteen.html. + +import ( + "bytes" + "context" + "crypto" + "crypto/ecdsa" + "crypto/ed25519" + "crypto/rsa" + "crypto/x509" + "encoding/pem" + "errors" + "fmt" + "net" + "os" + "strings" + + circlSign "github.com/cloudflare/circl/sign" +) + +// Server returns a new TLS server side connection +// using conn as the underlying transport. +// The configuration config must be non-nil and must include +// at least one certificate or else set GetCertificate. +func Server(conn net.Conn, config *Config) *Conn { + c := &Conn{ + conn: conn, + config: config, + } + c.handshakeFn = c.serverHandshake + return c +} + +// Client returns a new TLS client side connection +// using conn as the underlying transport. +// The config cannot be nil: users must set either ServerName or +// InsecureSkipVerify in the config. +func Client(conn net.Conn, config *Config) *Conn { + c := &Conn{ + conn: conn, + config: config, + isClient: true, + } + c.handshakeFn = c.clientHandshake + return c +} + +// A listener implements a network listener (net.Listener) for TLS connections. +type listener struct { + net.Listener + config *Config +} + +// Accept waits for and returns the next incoming TLS connection. +// The returned connection is of type *Conn. +func (l *listener) Accept() (net.Conn, error) { + c, err := l.Listener.Accept() + if err != nil { + return nil, err + } + return Server(c, l.config), nil +} + +// NewListener creates a Listener which accepts connections from an inner +// Listener and wraps each connection with [Server]. +// The configuration config must be non-nil and must include +// at least one certificate or else set GetCertificate. +func NewListener(inner net.Listener, config *Config) net.Listener { + l := new(listener) + l.Listener = inner + l.config = config + return l +} + +// Listen creates a TLS listener accepting connections on the +// given network address using net.Listen. +// The configuration config must be non-nil and must include +// at least one certificate or else set GetCertificate. +func Listen(network, laddr string, config *Config) (net.Listener, error) { + // If this condition changes, consider updating http.Server.ServeTLS too. + if config == nil || len(config.Certificates) == 0 && + config.GetCertificate == nil && config.GetConfigForClient == nil { + return nil, errors.New("tls: neither Certificates, GetCertificate, nor GetConfigForClient set in Config") + } + l, err := net.Listen(network, laddr) + if err != nil { + return nil, err + } + return NewListener(l, config), nil +} + +type timeoutError struct{} + +func (timeoutError) Error() string { return "tls: DialWithDialer timed out" } +func (timeoutError) Timeout() bool { return true } +func (timeoutError) Temporary() bool { return true } + +// DialWithDialer connects to the given network address using dialer.Dial and +// then initiates a TLS handshake, returning the resulting TLS connection. Any +// timeout or deadline given in the dialer apply to connection and TLS +// handshake as a whole. +// +// DialWithDialer interprets a nil configuration as equivalent to the zero +// configuration; see the documentation of [Config] for the defaults. +// +// DialWithDialer uses context.Background internally; to specify the context, +// use [Dialer.DialContext] with NetDialer set to the desired dialer. +func DialWithDialer(dialer *net.Dialer, network, addr string, config *Config) (*Conn, error) { + return dial(context.Background(), dialer, network, addr, config) +} + +func dial(ctx context.Context, netDialer *net.Dialer, network, addr string, config *Config) (*Conn, error) { + if netDialer.Timeout != 0 { + var cancel context.CancelFunc + ctx, cancel = context.WithTimeout(ctx, netDialer.Timeout) + defer cancel() + } + + if !netDialer.Deadline.IsZero() { + var cancel context.CancelFunc + ctx, cancel = context.WithDeadline(ctx, netDialer.Deadline) + defer cancel() + } + + rawConn, err := netDialer.DialContext(ctx, network, addr) + if err != nil { + return nil, err + } + + colonPos := strings.LastIndex(addr, ":") + if colonPos == -1 { + colonPos = len(addr) + } + hostname := addr[:colonPos] + + if config == nil { + config = defaultConfig() + } + // If no ServerName is set, infer the ServerName + // from the hostname we're connecting to. + if config.ServerName == "" { + // Make a copy to avoid polluting argument or default. + c := config.Clone() + c.ServerName = hostname + config = c + } + + conn := Client(rawConn, config) + if err := conn.HandshakeContext(ctx); err != nil { + rawConn.Close() + return nil, err + } + return conn, nil +} + +// Dial connects to the given network address using net.Dial +// and then initiates a TLS handshake, returning the resulting +// TLS connection. +// Dial interprets a nil configuration as equivalent to +// the zero configuration; see the documentation of Config +// for the defaults. +func Dial(network, addr string, config *Config) (*Conn, error) { + return DialWithDialer(new(net.Dialer), network, addr, config) +} + +// Dialer dials TLS connections given a configuration and a Dialer for the +// underlying connection. +type Dialer struct { + // NetDialer is the optional dialer to use for the TLS connections' + // underlying TCP connections. + // A nil NetDialer is equivalent to the net.Dialer zero value. + NetDialer *net.Dialer + + // Config is the TLS configuration to use for new connections. + // A nil configuration is equivalent to the zero + // configuration; see the documentation of Config for the + // defaults. + Config *Config +} + +// Dial connects to the given network address and initiates a TLS +// handshake, returning the resulting TLS connection. +// +// The returned [Conn], if any, will always be of type *[Conn]. +// +// Dial uses context.Background internally; to specify the context, +// use [Dialer.DialContext]. +func (d *Dialer) Dial(network, addr string) (net.Conn, error) { + return d.DialContext(context.Background(), network, addr) +} + +func (d *Dialer) netDialer() *net.Dialer { + if d.NetDialer != nil { + return d.NetDialer + } + return new(net.Dialer) +} + +// DialContext connects to the given network address and initiates a TLS +// handshake, returning the resulting TLS connection. +// +// The provided Context must be non-nil. If the context expires before +// the connection is complete, an error is returned. Once successfully +// connected, any expiration of the context will not affect the +// connection. +// +// The returned [Conn], if any, will always be of type *[Conn]. +func (d *Dialer) DialContext(ctx context.Context, network, addr string) (net.Conn, error) { + c, err := dial(ctx, d.netDialer(), network, addr, d.Config) + if err != nil { + // Don't return c (a typed nil) in an interface. + return nil, err + } + return c, nil +} + +// LoadX509KeyPair reads and parses a public/private key pair from a pair of +// files. The files must contain PEM encoded data. The certificate file may +// contain intermediate certificates following the leaf certificate to form a +// certificate chain. On successful return, Certificate.Leaf will be populated. +// +// Before Go 1.23 Certificate.Leaf was left nil, and the parsed certificate was +// discarded. This behavior can be re-enabled by setting "x509keypairleaf=0" +// in the GODEBUG environment variable. +func LoadX509KeyPair(certFile, keyFile string) (Certificate, error) { + certPEMBlock, err := os.ReadFile(certFile) + if err != nil { + return Certificate{}, err + } + keyPEMBlock, err := os.ReadFile(keyFile) + if err != nil { + return Certificate{}, err + } + return X509KeyPair(certPEMBlock, keyPEMBlock) +} + +// var x509keypairleaf = godebug.New("x509keypairleaf") [uTLS] + +// X509KeyPair parses a public/private key pair from a pair of +// PEM encoded data. On successful return, Certificate.Leaf will be populated. +// +// Before Go 1.23 Certificate.Leaf was left nil, and the parsed certificate was +// discarded. This behavior can be re-enabled by setting "x509keypairleaf=0" +// in the GODEBUG environment variable. +func X509KeyPair(certPEMBlock, keyPEMBlock []byte) (Certificate, error) { + fail := func(err error) (Certificate, error) { return Certificate{}, err } + + var cert Certificate + var skippedBlockTypes []string + for { + var certDERBlock *pem.Block + certDERBlock, certPEMBlock = pem.Decode(certPEMBlock) + if certDERBlock == nil { + break + } + if certDERBlock.Type == "CERTIFICATE" { + cert.Certificate = append(cert.Certificate, certDERBlock.Bytes) + } else { + skippedBlockTypes = append(skippedBlockTypes, certDERBlock.Type) + } + } + + if len(cert.Certificate) == 0 { + if len(skippedBlockTypes) == 0 { + return fail(errors.New("tls: failed to find any PEM data in certificate input")) + } + if len(skippedBlockTypes) == 1 && strings.HasSuffix(skippedBlockTypes[0], "PRIVATE KEY") { + return fail(errors.New("tls: failed to find certificate PEM data in certificate input, but did find a private key; PEM inputs may have been switched")) + } + return fail(fmt.Errorf("tls: failed to find \"CERTIFICATE\" PEM block in certificate input after skipping PEM blocks of the following types: %v", skippedBlockTypes)) + } + + skippedBlockTypes = skippedBlockTypes[:0] + var keyDERBlock *pem.Block + for { + keyDERBlock, keyPEMBlock = pem.Decode(keyPEMBlock) + if keyDERBlock == nil { + if len(skippedBlockTypes) == 0 { + return fail(errors.New("tls: failed to find any PEM data in key input")) + } + if len(skippedBlockTypes) == 1 && skippedBlockTypes[0] == "CERTIFICATE" { + return fail(errors.New("tls: found a certificate rather than a key in the PEM for the private key")) + } + return fail(fmt.Errorf("tls: failed to find PEM block with type ending in \"PRIVATE KEY\" in key input after skipping PEM blocks of the following types: %v", skippedBlockTypes)) + } + if keyDERBlock.Type == "PRIVATE KEY" || strings.HasSuffix(keyDERBlock.Type, " PRIVATE KEY") { + break + } + skippedBlockTypes = append(skippedBlockTypes, keyDERBlock.Type) + } + + // We don't need to parse the public key for TLS, but we so do anyway + // to check that it looks sane and matches the private key. + x509Cert, err := x509.ParseCertificate(cert.Certificate[0]) + if err != nil { + return fail(err) + } + + // [uTLS section begins] + // if x509keypairleaf.Value() != "0" { + // cert.Leaf = x509Cert + // } else { + // x509keypairleaf.IncNonDefault() + // } + // [uTLS section ends] + + cert.PrivateKey, err = parsePrivateKey(keyDERBlock.Bytes) + if err != nil { + return fail(err) + } + + switch pub := x509Cert.PublicKey.(type) { + case *rsa.PublicKey: + priv, ok := cert.PrivateKey.(*rsa.PrivateKey) + if !ok { + return fail(errors.New("tls: private key type does not match public key type")) + } + if pub.N.Cmp(priv.N) != 0 { + return fail(errors.New("tls: private key does not match public key")) + } + case *ecdsa.PublicKey: + priv, ok := cert.PrivateKey.(*ecdsa.PrivateKey) + if !ok { + return fail(errors.New("tls: private key type does not match public key type")) + } + if pub.X.Cmp(priv.X) != 0 || pub.Y.Cmp(priv.Y) != 0 { + return fail(errors.New("tls: private key does not match public key")) + } + case ed25519.PublicKey: + priv, ok := cert.PrivateKey.(ed25519.PrivateKey) + if !ok { + return fail(errors.New("tls: private key type does not match public key type")) + } + if !bytes.Equal(priv.Public().(ed25519.PublicKey), pub) { + return fail(errors.New("tls: private key does not match public key")) + } + // [UTLS SECTION BEGINS] + // Ported from cloudflare/go + case circlSign.PublicKey: + priv, ok := cert.PrivateKey.(circlSign.PrivateKey) + if !ok { + return fail(errors.New("tls: private key type does not match public key type")) + } + pkBytes, err := priv.Public().(circlSign.PublicKey).MarshalBinary() + pkBytes2, err2 := pub.MarshalBinary() + + if err != nil || err2 != nil || !bytes.Equal(pkBytes, pkBytes2) { + return fail(errors.New("tls: private key does not match public key")) + } + // [UTLS SECTION ENDS] + default: + return fail(errors.New("tls: unknown public key algorithm")) + } + + return cert, nil +} + +// Attempt to parse the given private key DER block. OpenSSL 0.9.8 generates +// PKCS #1 private keys by default, while OpenSSL 1.0.0 generates PKCS #8 keys. +// OpenSSL ecparam generates SEC1 EC private keys for ECDSA. We try all three. +func parsePrivateKey(der []byte) (crypto.PrivateKey, error) { + if key, err := x509.ParsePKCS1PrivateKey(der); err == nil { + return key, nil + } + if key, err := x509.ParsePKCS8PrivateKey(der); err == nil { + switch key := key.(type) { + case *rsa.PrivateKey, *ecdsa.PrivateKey, ed25519.PrivateKey, circlSign.PrivateKey: // [uTLS] ported from cloudflare/go + return key, nil + default: + return nil, errors.New("tls: found unknown private key type in PKCS#8 wrapping") + } + } + if key, err := x509.ParseECPrivateKey(der); err == nil { + return key, nil + } + + return nil, errors.New("tls: failed to parse private key") +} diff --git a/backend/vendor/github.com/refraction-networking/utls/tls_cf.go b/backend/vendor/github.com/refraction-networking/utls/tls_cf.go new file mode 100644 index 0000000..5b74cb4 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/tls_cf.go @@ -0,0 +1,62 @@ +// Copyright 2021 Cloudflare, Inc. All rights reserved. Use of this source code +// is governed by a BSD-style license that can be found in the LICENSE file. + +package tls + +import ( + circlPki "github.com/cloudflare/circl/pki" + circlSign "github.com/cloudflare/circl/sign" + "github.com/cloudflare/circl/sign/eddilithium3" +) + +// To add a signature scheme from Circl +// +// 1. make sure it implements TLSScheme and CertificateScheme, +// 2. follow the instructions in crypto/x509/x509_cf.go +// 3. add a signature to the iota in common.go +// 4. add row in the circlSchemes lists below + +var circlSchemes = [...]struct { + sigType uint8 + scheme circlSign.Scheme +}{ + {signatureEdDilithium3, eddilithium3.Scheme()}, +} + +func circlSchemeBySigType(sigType uint8) circlSign.Scheme { + for _, cs := range circlSchemes { + if cs.sigType == sigType { + return cs.scheme + } + } + return nil +} + +func sigTypeByCirclScheme(scheme circlSign.Scheme) uint8 { + for _, cs := range circlSchemes { + if cs.scheme == scheme { + return cs.sigType + } + } + return 0 +} + +var supportedSignatureAlgorithmsWithCircl []SignatureScheme + +// supportedSignatureAlgorithms returns enabled signature schemes. PQ signature +// schemes are only included when tls.Config#PQSignatureSchemesEnabled is set +// and FIPS-only mode is not enabled. +func (c *Config) supportedSignatureAlgorithms() []SignatureScheme { + if c != nil && c.PQSignatureSchemesEnabled { + return supportedSignatureAlgorithmsWithCircl + } + return defaultSupportedSignatureAlgorithms +} + +func init() { + supportedSignatureAlgorithmsWithCircl = append([]SignatureScheme{}, defaultSupportedSignatureAlgorithms...) + for _, cs := range circlSchemes { + supportedSignatureAlgorithmsWithCircl = append(supportedSignatureAlgorithmsWithCircl, + SignatureScheme(cs.scheme.(circlPki.TLSScheme).TLSIdentifier())) + } +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_alias.go b/backend/vendor/github.com/refraction-networking/utls/u_alias.go new file mode 100644 index 0000000..7cf5d16 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_alias.go @@ -0,0 +1,41 @@ +package tls + +import ( + "crypto/ecdh" + + "github.com/cloudflare/circl/kem" +) + +// This file contains all the alias functions, symbols, names, etc. that +// was once used in the old version of the library. This is to ensure +// backwards compatibility with the old version of the library. + +// TLS Extensions + +// UtlsExtendedMasterSecretExtension is an alias for ExtendedMasterSecretExtension. +// +// Deprecated: Use ExtendedMasterSecretExtension instead. +type UtlsExtendedMasterSecretExtension = ExtendedMasterSecretExtension + +// Deprecated: Use KeySharePrivateKeys instead. This type is not used and will be removed in the future. +// KeySharesParameters serves as a in-memory storage for generated keypairs by UTLS when generating +// ClientHello. It is used to store both ecdhe and kem keypairs. +type KeySharesParameters struct{} + +func NewKeySharesParameters() *KeySharesParameters { return &KeySharesParameters{} } + +func (*KeySharesParameters) AddEcdheKeypair(curveID CurveID, ecdheKey *ecdh.PrivateKey, ecdhePubKey *ecdh.PublicKey) { + return +} + +func (*KeySharesParameters) GetEcdheKey(curveID CurveID) (ecdheKey *ecdh.PrivateKey, ok bool) { return } + +func (*KeySharesParameters) GetEcdhePubkey(curveID CurveID) (params *ecdh.PublicKey, ok bool) { return } + +func (*KeySharesParameters) AddKemKeypair(curveID CurveID, kemKey kem.PrivateKey, kemPubKey kem.PublicKey) { + return +} + +func (ksp *KeySharesParameters) GetKemKey(curveID CurveID) (kemKey kem.PrivateKey, ok bool) { return } + +func (ksp *KeySharesParameters) GetKemPubkey(curveID CurveID) (params kem.PublicKey, ok bool) { return } diff --git a/backend/vendor/github.com/refraction-networking/utls/u_clienthello_json.go b/backend/vendor/github.com/refraction-networking/utls/u_clienthello_json.go new file mode 100644 index 0000000..027e082 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_clienthello_json.go @@ -0,0 +1,184 @@ +package tls + +import ( + "encoding/json" + "errors" + "fmt" + "os" + + "github.com/refraction-networking/utls/dicttls" +) + +var ErrUnknownExtension = errors.New("extension name is unknown to the dictionary") + +type ClientHelloSpecJSONUnmarshaler struct { + CipherSuites *CipherSuitesJSONUnmarshaler `json:"cipher_suites"` + CompressionMethods *CompressionMethodsJSONUnmarshaler `json:"compression_methods"` + Extensions *TLSExtensionsJSONUnmarshaler `json:"extensions"` + TLSVersMin uint16 `json:"min_vers,omitempty"` // optional + TLSVersMax uint16 `json:"max_vers,omitempty"` // optional +} + +func (chsju *ClientHelloSpecJSONUnmarshaler) ClientHelloSpec() ClientHelloSpec { + return ClientHelloSpec{ + CipherSuites: chsju.CipherSuites.CipherSuites(), + CompressionMethods: chsju.CompressionMethods.CompressionMethods(), + Extensions: chsju.Extensions.Extensions(), + TLSVersMin: chsju.TLSVersMin, + TLSVersMax: chsju.TLSVersMax, + } +} + +type CipherSuitesJSONUnmarshaler struct { + cipherSuites []uint16 +} + +func (c *CipherSuitesJSONUnmarshaler) UnmarshalJSON(jsonStr []byte) error { + var cipherSuiteNames []string + if err := json.Unmarshal(jsonStr, &cipherSuiteNames); err != nil { + return err + } + + for _, name := range cipherSuiteNames { + if name == "GREASE" { + c.cipherSuites = append(c.cipherSuites, GREASE_PLACEHOLDER) + continue + } + + if id, ok := dicttls.DictCipherSuiteNameIndexed[name]; ok { + c.cipherSuites = append(c.cipherSuites, id) + } else { + return fmt.Errorf("unknown cipher suite name: %s", name) + } + } + + return nil +} + +func (c *CipherSuitesJSONUnmarshaler) CipherSuites() []uint16 { + return c.cipherSuites +} + +type CompressionMethodsJSONUnmarshaler struct { + compressionMethods []uint8 +} + +func (c *CompressionMethodsJSONUnmarshaler) UnmarshalJSON(jsonStr []byte) error { + var compressionMethodNames []string + if err := json.Unmarshal(jsonStr, &compressionMethodNames); err != nil { + return err + } + + for _, name := range compressionMethodNames { + if id, ok := dicttls.DictCompMethNameIndexed[name]; ok { + c.compressionMethods = append(c.compressionMethods, id) + } else { + return fmt.Errorf("unknown compression method name: %s", name) + } + } + + return nil +} + +func (c *CompressionMethodsJSONUnmarshaler) CompressionMethods() []uint8 { + return c.compressionMethods +} + +type TLSExtensionsJSONUnmarshaler struct { + AllowUnknownExt bool // if set, unknown extensions will be added as GenericExtension, without recovering ext payload + UseRealPSK bool // if set, PSK extension will be real PSK extension, otherwise it will be fake PSK extension + extensions []TLSExtensionJSON +} + +func (e *TLSExtensionsJSONUnmarshaler) UnmarshalJSON(jsonStr []byte) error { + var accepters []tlsExtensionJSONAccepter + if err := json.Unmarshal(jsonStr, &accepters); err != nil { + return err + } + + var exts []TLSExtensionJSON = make([]TLSExtensionJSON, 0, len(accepters)) + for _, accepter := range accepters { + if accepter.extNameOnly.Name == "GREASE" { + exts = append(exts, &UtlsGREASEExtension{}) + continue + } + + if extID, ok := dicttls.DictExtTypeNameIndexed[accepter.extNameOnly.Name]; !ok { + return fmt.Errorf("%w: %s", ErrUnknownExtension, accepter.extNameOnly.Name) + } else { + // get extension type from ID + var ext TLSExtension = ExtensionFromID(extID) + if ext == nil { + if e.AllowUnknownExt { + // fallback to generic extension, without recovering ext payload + ext = genericExtension(extID, accepter.extNameOnly.Name) + } else { + return fmt.Errorf("extension %s (%d) is not JSON compatible", accepter.extNameOnly.Name, extID) + } + } + + switch extID { + case extensionPreSharedKey: + // PSK extension, need to see if we do real or fake PSK + if e.UseRealPSK { + ext = &UtlsPreSharedKeyExtension{} + } else { + ext = &FakePreSharedKeyExtension{} + } + } + + if extJsonCompatible, ok := ext.(TLSExtensionJSON); ok { + exts = append(exts, extJsonCompatible) + } else { + return fmt.Errorf("extension %s (%d) is not JSON compatible", accepter.extNameOnly.Name, extID) + } + } + } + + // unmashal extensions + for idx, ext := range exts { + // json.Unmarshal will call the UnmarshalJSON method of the extension + if err := json.Unmarshal(accepters[idx].origJsonInput, ext); err != nil { + return err + } + } + + e.extensions = exts + return nil +} + +func (e *TLSExtensionsJSONUnmarshaler) Extensions() []TLSExtension { + var exts []TLSExtension = make([]TLSExtension, 0, len(e.extensions)) + for _, ext := range e.extensions { + exts = append(exts, ext) + } + return exts +} + +func genericExtension(id uint16, name string) TLSExtension { + var warningMsg string = "WARNING: extension " + warningMsg += fmt.Sprintf("%d ", id) + if len(name) > 0 { + warningMsg += fmt.Sprintf("(%s) ", name) + } + warningMsg += "is falling back to generic extension" + warningMsg += "\n" + + fmt.Fprint(os.Stderr, warningMsg) + + // fallback to generic extension + return &GenericExtension{Id: id} +} + +type tlsExtensionJSONAccepter struct { + extNameOnly struct { + Name string `json:"name"` + } + origJsonInput []byte +} + +func (t *tlsExtensionJSONAccepter) UnmarshalJSON(jsonStr []byte) error { + t.origJsonInput = make([]byte, len(jsonStr)) + copy(t.origJsonInput, jsonStr) + return json.Unmarshal(jsonStr, &t.extNameOnly) +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_common.go b/backend/vendor/github.com/refraction-networking/utls/u_common.go new file mode 100644 index 0000000..a0616e8 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_common.go @@ -0,0 +1,814 @@ +// Copyright 2017 Google Inc. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto/hmac" + "crypto/sha512" + "encoding/json" + "errors" + "fmt" + "hash" + "log" + + "github.com/refraction-networking/utls/internal/helper" + "golang.org/x/crypto/cryptobyte" +) + +// Naming convention: +// Unsupported things are prefixed with "Fake" +// Things, supported by utls, but not crypto/tls' are prefixed with "utls" +// Supported things, that have changed their ID are prefixed with "Old" +// Supported but disabled things are prefixed with "Disabled". We will _enable_ them. + +// TLS handshake message types. +const ( + utlsTypeEncryptedExtensions uint8 = 8 // implemention incomplete by crypto/tls + // https://datatracker.ietf.org/doc/html/rfc8879#section-7.2 + utlsTypeCompressedCertificate uint8 = 25 +) + +// TLS +const ( + extensionNextProtoNeg uint16 = 13172 // not IANA assigned. Removed by crypto/tls since Nov 2019 + + utlsExtensionPadding uint16 = 21 + utlsExtensionCompressCertificate uint16 = 27 // https://datatracker.ietf.org/doc/html/rfc8879#section-7.1 + utlsExtensionApplicationSettings uint16 = 17513 // not IANA assigned + utlsFakeExtensionCustom uint16 = 1234 // not IANA assigned, for ALPS + utlsExtensionECH uint16 = 0xfe0d // draft-ietf-tls-esni-17 + utlsExtensionECHOuterExtensions uint16 = 0xfd00 // draft-ietf-tls-esni-17 + + // extensions with 'fake' prefix break connection, if server echoes them back + fakeExtensionEncryptThenMAC uint16 = 22 + fakeExtensionTokenBinding uint16 = 24 + fakeExtensionDelegatedCredentials uint16 = 34 + fakeExtensionPreSharedKey uint16 = 41 + fakeOldExtensionChannelID uint16 = 30031 // not IANA assigned + fakeExtensionChannelID uint16 = 30032 // not IANA assigned +) + +const ( + OLD_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 = uint16(0xcc13) + OLD_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 = uint16(0xcc14) + + DISABLED_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 = uint16(0xc024) + DISABLED_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 = uint16(0xc028) + DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256 = uint16(0x003d) + + FAKE_OLD_TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256 = uint16(0xcc15) // we can try to craft these ciphersuites + FAKE_TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 = uint16(0x009e) // from existing pieces, if needed + + FAKE_TLS_DHE_RSA_WITH_AES_128_CBC_SHA = uint16(0x0033) + FAKE_TLS_DHE_RSA_WITH_AES_256_CBC_SHA = uint16(0x0039) + FAKE_TLS_RSA_WITH_RC4_128_MD5 = uint16(0x0004) + FAKE_TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 = uint16(0x009f) + FAKE_TLS_DHE_DSS_WITH_AES_128_CBC_SHA = uint16(0x0032) + FAKE_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 = uint16(0x006b) + FAKE_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 = uint16(0x0067) + FAKE_TLS_EMPTY_RENEGOTIATION_INFO_SCSV = uint16(0x00ff) + + // https://docs.microsoft.com/en-us/dotnet/api/system.net.security.tlsciphersuite?view=netcore-3.1 + FAKE_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA = uint16(0xc008) +) + +const ( + CurveSECP256R1 CurveID = 0x0017 + CurveSECP384R1 CurveID = 0x0018 + CurveSECP521R1 CurveID = 0x0019 + CurveX25519 CurveID = 0x001d + + FakeCurveFFDHE2048 CurveID = 0x0100 + FakeCurveFFDHE3072 CurveID = 0x0101 + FakeCurveFFDHE4096 CurveID = 0x0102 + FakeCurveFFDHE6144 CurveID = 0x0103 + FakeCurveFFDHE8192 CurveID = 0x0104 +) + +const ( + X25519Kyber768Draft00 CurveID = 0x6399 + + FakeCurveX25519Kyber512Draft00 CurveID = 0xfe30 + FakeCurveX25519Kyber768Draft00Old CurveID = 0xfe31 + FakeCurveP256Kyber768Draft00 CurveID = 0xfe32 + + X25519Kyber512Draft00 CurveID = FakeCurveX25519Kyber512Draft00 + X25519Kyber768Draft00Old CurveID = FakeCurveX25519Kyber768Draft00Old + P256Kyber768Draft00 CurveID = FakeCurveP256Kyber768Draft00 +) + +// Other things +const ( + fakeRecordSizeLimit uint16 = 0x001c +) + +// newest signatures +var ( + FakePKCS1WithSHA224 SignatureScheme = 0x0301 + FakeECDSAWithSHA224 SignatureScheme = 0x0303 + + FakeSHA1WithDSA SignatureScheme = 0x0202 + FakeSHA256WithDSA SignatureScheme = 0x0402 + + // fakeEd25519 = SignatureAndHash{0x08, 0x07} + // fakeEd448 = SignatureAndHash{0x08, 0x08} +) + +// fake curves(groups) +var ( + FakeFFDHE2048 = uint16(0x0100) + FakeFFDHE3072 = uint16(0x0101) +) + +// https://tools.ietf.org/html/draft-ietf-tls-certificate-compression-04 +type CertCompressionAlgo uint16 + +const ( + CertCompressionZlib CertCompressionAlgo = 0x0001 + CertCompressionBrotli CertCompressionAlgo = 0x0002 + CertCompressionZstd CertCompressionAlgo = 0x0003 +) + +const ( + PskModePlain uint8 = pskModePlain + PskModeDHE uint8 = pskModeDHE +) + +type ClientHelloID struct { + Client string + + // Version specifies version of a mimicked clients (e.g. browsers). + // Not used in randomized, custom handshake, and default Go. + Version string + + // Seed is only used for randomized fingerprints to seed PRNG. + // Must not be modified once set. + Seed *PRNGSeed + + // Weights are only used for randomized fingerprints in func + // generateRandomizedSpec(). Must not be modified once set. + Weights *Weights +} + +func (p *ClientHelloID) Str() string { + return fmt.Sprintf("%s-%s", p.Client, p.Version) +} + +func (p *ClientHelloID) IsSet() bool { + return (p.Client == "") && (p.Version == "") +} + +const ( + // clients + helloGolang = "Golang" + helloRandomized = "Randomized" + helloRandomizedALPN = "Randomized-ALPN" + helloRandomizedNoALPN = "Randomized-NoALPN" + helloCustom = "Custom" + helloFirefox = "Firefox" + helloChrome = "Chrome" + helloIOS = "iOS" + helloAndroid = "Android" + helloEdge = "Edge" + helloSafari = "Safari" + hello360 = "360Browser" + helloQQ = "QQBrowser" + + // versions + helloAutoVers = "0" +) + +type ClientHelloSpec struct { + CipherSuites []uint16 // nil => default + CompressionMethods []uint8 // nil => no compression + Extensions []TLSExtension // nil => no extensions + + TLSVersMin uint16 // [1.0-1.3] default: parse from .Extensions, if SupportedVersions ext is not present => 1.0 + TLSVersMax uint16 // [1.2-1.3] default: parse from .Extensions, if SupportedVersions ext is not present => 1.2 + + // GreaseStyle: currently only random + // sessionID may or may not depend on ticket; nil => random + GetSessionID func(ticket []byte) [32]byte + + // TLSFingerprintLink string // ?? link to tlsfingerprint.io for informational purposes +} + +// ReadCipherSuites is a helper function to construct a list of cipher suites from +// a []byte into []uint16. +// +// example: []byte{0x13, 0x01, 0x13, 0x02, 0x13, 0x03} => []uint16{0x1301, 0x1302, 0x1303} +func (chs *ClientHelloSpec) ReadCipherSuites(b []byte) error { + cipherSuites := []uint16{} + s := cryptobyte.String(b) + for !s.Empty() { + var suite uint16 + if !s.ReadUint16(&suite) { + return errors.New("unable to read ciphersuite") + } + cipherSuites = append(cipherSuites, unGREASEUint16(suite)) + } + chs.CipherSuites = cipherSuites + return nil +} + +// ReadCompressionMethods is a helper function to construct a list of compression +// methods from a []byte into []uint8. +func (chs *ClientHelloSpec) ReadCompressionMethods(compressionMethods []byte) error { + chs.CompressionMethods = compressionMethods + return nil +} + +// ReadTLSExtensions is a helper function to construct a list of TLS extensions from +// a byte slice into []TLSExtension. +func (chs *ClientHelloSpec) ReadTLSExtensions(b []byte, allowBluntMimicry bool, realPSK bool) error { + extensions := cryptobyte.String(b) + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) { + return fmt.Errorf("unable to read extension ID") + } + if !extensions.ReadUint16LengthPrefixed(&extData) { + return fmt.Errorf("unable to read data for extension %x", extension) + } + + ext := ExtensionFromID(extension) + extWriter, ok := ext.(TLSExtensionWriter) + if ext != nil && ok { // known extension and implements TLSExtensionWriter properly + switch extension { + case extensionPreSharedKey: + // PSK extension, need to see if we do real or fake PSK + if realPSK { + extWriter = &UtlsPreSharedKeyExtension{} + } else { + extWriter = &FakePreSharedKeyExtension{} + } + case extensionSupportedVersions: + chs.TLSVersMin = 0 + chs.TLSVersMax = 0 + } + + if _, err := extWriter.Write(extData); err != nil { + return err + } + + chs.Extensions = append(chs.Extensions, extWriter) + } else { + if allowBluntMimicry { + chs.Extensions = append(chs.Extensions, &GenericExtension{extension, extData}) + } else { + return fmt.Errorf("unsupported extension %d", extension) + } + } + } + return nil +} + +func (chs *ClientHelloSpec) AlwaysAddPadding() { + alreadyHasPadding := false + for idx, ext := range chs.Extensions { + if _, ok := ext.(*UtlsPaddingExtension); ok { + alreadyHasPadding = true + break + } + if _, ok := ext.(PreSharedKeyExtension); ok { + alreadyHasPadding = true // PSK must be last, so we can't append padding after it + // instead we will insert padding before PSK + chs.Extensions = append(chs.Extensions[:idx], append([]TLSExtension{&UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}}, chs.Extensions[idx:]...)...) + break + } + } + if !alreadyHasPadding { + chs.Extensions = append(chs.Extensions, &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}) + } +} + +// Import TLS ClientHello data from client.tlsfingerprint.io:8443 +// +// data is a map of []byte with following keys: +// - cipher_suites: [10, 10, 19, 1, 19, 2, 19, 3, 192, 43, 192, 47, 192, 44, 192, 48, 204, 169, 204, 168, 192, 19, 192, 20, 0, 156, 0, 157, 0, 47, 0, 53] +// - compression_methods: [0] => null +// - extensions: [10, 10, 255, 1, 0, 45, 0, 35, 0, 16, 68, 105, 0, 11, 0, 43, 0, 18, 0, 13, 0, 0, 0, 10, 0, 27, 0, 5, 0, 51, 0, 23, 10, 10, 0, 21] +// - pt_fmts (ec_point_formats): [1, 0] => len: 1, content: 0x00 +// - sig_algs （signature_algorithms): [0, 16, 4, 3, 8, 4, 4, 1, 5, 3, 8, 5, 5, 1, 8, 6, 6, 1] => len: 16, content: 0x0403, 0x0804, 0x0401, 0x0503, 0x0805, 0x0501, 0x0806, 0x0601 +// - supported_versions: [10, 10, 3, 4, 3, 3] => 0x0a0a, 0x0304, 0x0303 (GREASE, TLS 1.3, TLS 1.2) +// - curves (named_groups, supported_groups): [0, 8, 10, 10, 0, 29, 0, 23, 0, 24] => len: 8, content: GREASE, 0x001d, 0x0017, 0x0018 +// - alpn: [0, 12, 2, 104, 50, 8, 104, 116, 116, 112, 47, 49, 46, 49] => len: 12, content: h2, http/1.1 +// - key_share: [10, 10, 0, 1, 0, 29, 0, 32] => {group: 0x0a0a, len:1}, {group: 0x001d, len:32} +// - psk_key_exchange_modes: [1] => psk_dhe_ke(0x01) +// - cert_compression_algs: [2, 0, 2] => brotli (0x0002) +// - record_size_limit: [0, 255] => 255 +// +// TLSVersMin/TLSVersMax are set to 0 if supported_versions is present. +// To prevent conflict, they should be set manually if needed BEFORE calling this function. +func (chs *ClientHelloSpec) ImportTLSClientHello(data map[string][]byte) error { + var tlsExtensionTypes []uint16 + var err error + + if data["cipher_suites"] == nil { + return errors.New("cipher_suites is required") + } + chs.CipherSuites, err = helper.Uint8to16(data["cipher_suites"]) + if err != nil { + return err + } + + if data["compression_methods"] == nil { + return errors.New("compression_methods is required") + } + chs.CompressionMethods = data["compression_methods"] + + if data["extensions"] == nil { + return errors.New("extensions is required") + } + tlsExtensionTypes, err = helper.Uint8to16(data["extensions"]) + if err != nil { + return err + } + + for _, extType := range tlsExtensionTypes { + extension := ExtensionFromID(extType) + extWriter, ok := extension.(TLSExtensionWriter) + if !ok { + return fmt.Errorf("unsupported extension %d", extType) + } + if extension == nil || !ok { + log.Printf("[Warning] Unsupported extension %d added as a &GenericExtension without Data", extType) + chs.Extensions = append(chs.Extensions, &GenericExtension{extType, []byte{}}) + } else { + switch extType { + case extensionSupportedPoints: + if data["pt_fmts"] == nil { + return errors.New("pt_fmts is required") + } + _, err = extWriter.Write(data["pt_fmts"]) + if err != nil { + return err + } + case extensionSignatureAlgorithms: + if data["sig_algs"] == nil { + return errors.New("sig_algs is required") + } + _, err = extWriter.Write(data["sig_algs"]) + if err != nil { + return err + } + case extensionSupportedVersions: + chs.TLSVersMin = 0 + chs.TLSVersMax = 0 + + if data["supported_versions"] == nil { + return errors.New("supported_versions is required") + } + + // need to add uint8 length prefix + fixedData := make([]byte, len(data["supported_versions"])+1) + fixedData[0] = uint8(len(data["supported_versions"]) & 0xff) + copy(fixedData[1:], data["supported_versions"]) + _, err = extWriter.Write(fixedData) + if err != nil { + return err + } + case extensionSupportedCurves: + if data["curves"] == nil { + return errors.New("curves is required") + } + + _, err = extWriter.Write(data["curves"]) + if err != nil { + return err + } + case extensionALPN: + if data["alpn"] == nil { + return errors.New("alpn is required") + } + + _, err = extWriter.Write(data["alpn"]) + if err != nil { + return err + } + case extensionKeyShare: + if data["key_share"] == nil { + return errors.New("key_share is required") + } + + // need to add (zero) data per each key share, [10, 10, 0, 1] => [10, 10, 0, 1, 0] + fixedData := make([]byte, 0) + for i := 0; i < len(data["key_share"]); i += 4 { + fixedData = append(fixedData, data["key_share"][i:i+4]...) + for j := 0; j < int(data["key_share"][i+3]); j++ { + fixedData = append(fixedData, 0) + } + } + // add uint16 length prefix + fixedData = append([]byte{uint8(len(fixedData) >> 8), uint8(len(fixedData) & 0xff)}, fixedData...) + + _, err = extWriter.Write(fixedData) + if err != nil { + return err + } + case extensionPSKModes: + if data["psk_key_exchange_modes"] == nil { + return errors.New("psk_key_exchange_modes is required") + } + + // need to add uint8 length prefix + fixedData := make([]byte, len(data["psk_key_exchange_modes"])+1) + fixedData[0] = uint8(len(data["psk_key_exchange_modes"]) & 0xff) + copy(fixedData[1:], data["psk_key_exchange_modes"]) + _, err = extWriter.Write(fixedData) + if err != nil { + return err + } + case utlsExtensionCompressCertificate: + if data["cert_compression_algs"] == nil { + return errors.New("cert_compression_algs is required") + } + + // need to add uint8 length prefix + fixedData := make([]byte, len(data["cert_compression_algs"])+1) + fixedData[0] = uint8(len(data["cert_compression_algs"]) & 0xff) + copy(fixedData[1:], data["cert_compression_algs"]) + _, err = extWriter.Write(fixedData) + if err != nil { + return err + } + case fakeRecordSizeLimit: + if data["record_size_limit"] == nil { + return errors.New("record_size_limit is required") + } + + _, err = extWriter.Write(data["record_size_limit"]) // uint16 as []byte + if err != nil { + return err + } + case utlsExtensionApplicationSettings: + // TODO: tlsfingerprint.io should record/provide application settings data + extWriter.(*ApplicationSettingsExtension).SupportedProtocols = []string{"h2"} + case extensionPreSharedKey: + log.Printf("[Warning] PSK extension added without data") + default: + if !isGREASEUint16(extType) { + log.Printf("[Warning] extension %d added without data", extType) + } /*else { + log.Printf("[Warning] GREASE extension added but ID/Data discarded. They will be automatically re-GREASEd on ApplyPreset() call.") + }*/ + } + chs.Extensions = append(chs.Extensions, extWriter) + } + } + return nil +} + +// ImportTLSClientHelloFromJSON imports ClientHelloSpec from JSON data from client.tlsfingerprint.io format +// +// It calls ImportTLSClientHello internally after unmarshaling JSON data into map[string][]byte +func (chs *ClientHelloSpec) ImportTLSClientHelloFromJSON(jsonB []byte) error { + var data map[string][]byte + err := json.Unmarshal(jsonB, &data) + if err != nil { + return err + } + return chs.ImportTLSClientHello(data) +} + +// FromRaw converts a ClientHello message in the form of raw bytes into a ClientHelloSpec. +// +// ctrlFlags: []bool{bluntMimicry, realPSK} +func (chs *ClientHelloSpec) FromRaw(raw []byte, ctrlFlags ...bool) error { + if chs == nil { + return errors.New("cannot unmarshal into nil ClientHelloSpec") + } + + var bluntMimicry = false + var realPSK = false + if len(ctrlFlags) > 0 { + bluntMimicry = ctrlFlags[0] + } + if len(ctrlFlags) > 1 { + realPSK = ctrlFlags[1] + } + + *chs = ClientHelloSpec{} // reset + s := cryptobyte.String(raw) + + var contentType uint8 + var recordVersion uint16 + if !s.ReadUint8(&contentType) || // record type + !s.ReadUint16(&recordVersion) || !s.Skip(2) { // record version and length + return errors.New("unable to read record type, version, and length") + } + + if recordType(contentType) != recordTypeHandshake { + return errors.New("record is not a handshake") + } + + var handshakeVersion uint16 + var handshakeType uint8 + + if !s.ReadUint8(&handshakeType) || !s.Skip(3) || // message type and 3 byte length + !s.ReadUint16(&handshakeVersion) || !s.Skip(32) { // 32 byte random + return errors.New("unable to read handshake message type, length, and random") + } + + if handshakeType != typeClientHello { + return errors.New("handshake message is not a ClientHello") + } + + chs.TLSVersMin = recordVersion + chs.TLSVersMax = handshakeVersion + + var ignoredSessionID cryptobyte.String + if !s.ReadUint8LengthPrefixed(&ignoredSessionID) { + return errors.New("unable to read session id") + } + + // CipherSuites + var cipherSuitesBytes cryptobyte.String + if !s.ReadUint16LengthPrefixed(&cipherSuitesBytes) { + return errors.New("unable to read ciphersuites") + } + + if err := chs.ReadCipherSuites(cipherSuitesBytes); err != nil { + return err + } + + // CompressionMethods + var compressionMethods cryptobyte.String + if !s.ReadUint8LengthPrefixed(&compressionMethods) { + return errors.New("unable to read compression methods") + } + + if err := chs.ReadCompressionMethods(compressionMethods); err != nil { + return err + } + + if s.Empty() { + // Extensions are optional + return nil + } + + var extensions cryptobyte.String + if !s.ReadUint16LengthPrefixed(&extensions) { + return errors.New("unable to read extensions data") + } + + if err := chs.ReadTLSExtensions(extensions, bluntMimicry, realPSK); err != nil { + return err + } + + // if extension list includes padding, we update the padding-to-len according to + // the raw ClientHello length + for _, ext := range chs.Extensions { + if _, ok := ext.(*UtlsPaddingExtension); ok { + ext.(*UtlsPaddingExtension).GetPaddingLen = AlwaysPadToLen(len(raw) - 5) + break + } + } + + return nil +} + +// UnmarshalJSON unmarshals a ClientHello message in the form of JSON into a ClientHelloSpec. +func (chs *ClientHelloSpec) UnmarshalJSON(jsonB []byte) error { + var chsju ClientHelloSpecJSONUnmarshaler + if err := json.Unmarshal(jsonB, &chsju); err != nil { + return err + } + + *chs = chsju.ClientHelloSpec() + return nil +} + +var ( + // HelloGolang will use default "crypto/tls" handshake marshaling codepath, which WILL + // overwrite your changes to Hello(Config, Session are fine). + // You might want to call BuildHandshakeState() before applying any changes. + // UConn.Extensions will be completely ignored. + HelloGolang = ClientHelloID{helloGolang, helloAutoVers, nil, nil} + + // HelloCustom will prepare ClientHello with empty uconn.Extensions so you can fill it with + // TLSExtensions manually or use ApplyPreset function + HelloCustom = ClientHelloID{helloCustom, helloAutoVers, nil, nil} + + // HelloRandomized* randomly adds/reorders extensions, ciphersuites, etc. + HelloRandomized = ClientHelloID{helloRandomized, helloAutoVers, nil, nil} + HelloRandomizedALPN = ClientHelloID{helloRandomizedALPN, helloAutoVers, nil, nil} + HelloRandomizedNoALPN = ClientHelloID{helloRandomizedNoALPN, helloAutoVers, nil, nil} + + // The rest will will parrot given browser. + HelloFirefox_Auto = HelloFirefox_120 + HelloFirefox_55 = ClientHelloID{helloFirefox, "55", nil, nil} + HelloFirefox_56 = ClientHelloID{helloFirefox, "56", nil, nil} + HelloFirefox_63 = ClientHelloID{helloFirefox, "63", nil, nil} + HelloFirefox_65 = ClientHelloID{helloFirefox, "65", nil, nil} + HelloFirefox_99 = ClientHelloID{helloFirefox, "99", nil, nil} + HelloFirefox_102 = ClientHelloID{helloFirefox, "102", nil, nil} + HelloFirefox_105 = ClientHelloID{helloFirefox, "105", nil, nil} + HelloFirefox_120 = ClientHelloID{helloFirefox, "120", nil, nil} + + HelloChrome_Auto = HelloChrome_131 + HelloChrome_58 = ClientHelloID{helloChrome, "58", nil, nil} + HelloChrome_62 = ClientHelloID{helloChrome, "62", nil, nil} + HelloChrome_70 = ClientHelloID{helloChrome, "70", nil, nil} + HelloChrome_72 = ClientHelloID{helloChrome, "72", nil, nil} + HelloChrome_83 = ClientHelloID{helloChrome, "83", nil, nil} + HelloChrome_87 = ClientHelloID{helloChrome, "87", nil, nil} + HelloChrome_96 = ClientHelloID{helloChrome, "96", nil, nil} + HelloChrome_100 = ClientHelloID{helloChrome, "100", nil, nil} + HelloChrome_102 = ClientHelloID{helloChrome, "102", nil, nil} + HelloChrome_106_Shuffle = ClientHelloID{helloChrome, "106", nil, nil} // TLS Extension shuffler enabled starting from 106 + + // Chrome w/ PSK: Chrome start sending this ClientHello after doing TLS 1.3 handshake with the same server. + // Beta: PSK extension added. However, uTLS doesn't ship with full PSK support. + // Use at your own discretion. + HelloChrome_100_PSK = ClientHelloID{helloChrome, "100_PSK", nil, nil} + HelloChrome_112_PSK_Shuf = ClientHelloID{helloChrome, "112_PSK", nil, nil} + HelloChrome_114_Padding_PSK_Shuf = ClientHelloID{helloChrome, "114_PSK", nil, nil} + + // Chrome w/ Post-Quantum Key Agreement + // Beta: PQ extension added. However, uTLS doesn't ship with full PQ support. Use at your own discretion. + HelloChrome_115_PQ = ClientHelloID{helloChrome, "115_PQ", nil, nil} + HelloChrome_115_PQ_PSK = ClientHelloID{helloChrome, "115_PQ_PSK", nil, nil} + + // Chrome ECH + HelloChrome_120 = ClientHelloID{helloChrome, "120", nil, nil} + // Chrome w/ Post-Quantum Key Agreement and Encrypted ClientHello + HelloChrome_120_PQ = ClientHelloID{helloChrome, "120_PQ", nil, nil} + // Chrome w/ ML-KEM curve + HelloChrome_131 = ClientHelloID{helloChrome, "131", nil, nil} + + HelloIOS_Auto = HelloIOS_14 + HelloIOS_11_1 = ClientHelloID{helloIOS, "111", nil, nil} // legacy "111" means 11.1 + HelloIOS_12_1 = ClientHelloID{helloIOS, "12.1", nil, nil} + HelloIOS_13 = ClientHelloID{helloIOS, "13", nil, nil} + HelloIOS_14 = ClientHelloID{helloIOS, "14", nil, nil} + + HelloAndroid_11_OkHttp = ClientHelloID{helloAndroid, "11", nil, nil} + + HelloEdge_Auto = HelloEdge_85 // HelloEdge_106 seems to be incompatible with this library + HelloEdge_85 = ClientHelloID{helloEdge, "85", nil, nil} + HelloEdge_106 = ClientHelloID{helloEdge, "106", nil, nil} + + HelloSafari_Auto = HelloSafari_16_0 + HelloSafari_16_0 = ClientHelloID{helloSafari, "16.0", nil, nil} + + Hello360_Auto = Hello360_7_5 // Hello360_11_0 seems to be incompatible with this library + Hello360_7_5 = ClientHelloID{hello360, "7.5", nil, nil} + Hello360_11_0 = ClientHelloID{hello360, "11.0", nil, nil} + + HelloQQ_Auto = HelloQQ_11_1 + HelloQQ_11_1 = ClientHelloID{helloQQ, "11.1", nil, nil} +) + +type Weights struct { + Extensions_Append_ALPN float64 + TLSVersMax_Set_VersionTLS13 float64 + CipherSuites_Remove_RandomCiphers float64 + SigAndHashAlgos_Append_ECDSAWithSHA1 float64 + SigAndHashAlgos_Append_ECDSAWithP521AndSHA512 float64 + SigAndHashAlgos_Append_PSSWithSHA256 float64 + SigAndHashAlgos_Append_PSSWithSHA384_PSSWithSHA512 float64 + CurveIDs_Append_X25519 float64 + CurveIDs_Append_CurveP521 float64 + Extensions_Append_Padding float64 + Extensions_Append_Status float64 + Extensions_Append_SCT float64 + Extensions_Append_Reneg float64 + Extensions_Append_EMS float64 + FirstKeyShare_Set_CurveP256 float64 + Extensions_Append_ALPS float64 +} + +// Do not modify them directly as they may being used. If you +// want to use your custom weights, please make a copy first. +var DefaultWeights = Weights{ + Extensions_Append_ALPN: 0.7, + TLSVersMax_Set_VersionTLS13: 0.4, + CipherSuites_Remove_RandomCiphers: 0.4, + SigAndHashAlgos_Append_ECDSAWithSHA1: 0.63, + SigAndHashAlgos_Append_ECDSAWithP521AndSHA512: 0.59, + SigAndHashAlgos_Append_PSSWithSHA256: 0.51, + SigAndHashAlgos_Append_PSSWithSHA384_PSSWithSHA512: 0.9, + CurveIDs_Append_X25519: 0.71, + CurveIDs_Append_CurveP521: 0.46, + Extensions_Append_Padding: 0.62, + Extensions_Append_Status: 0.74, + Extensions_Append_SCT: 0.46, + Extensions_Append_Reneg: 0.75, + Extensions_Append_EMS: 0.77, + FirstKeyShare_Set_CurveP256: 0.25, + Extensions_Append_ALPS: 0.33, +} + +// based on spec's GreaseStyle, GREASE_PLACEHOLDER may be replaced by another GREASE value +// https://tools.ietf.org/html/draft-ietf-tls-grease-01 +const GREASE_PLACEHOLDER = 0x0a0a + +func isGREASEUint16(v uint16) bool { + // First byte is same as second byte + // and lowest nibble is 0xa + return ((v >> 8) == v&0xff) && v&0xf == 0xa +} + +func unGREASEUint16(v uint16) uint16 { + if isGREASEUint16(v) { + return GREASE_PLACEHOLDER + } else { + return v + } +} + +// utlsMacSHA384 returns a SHA-384 based MAC. These are only supported in TLS 1.2 +// so the given version is ignored. +func utlsMacSHA384(key []byte) hash.Hash { + return hmac.New(sha512.New384, key) +} + +var utlsSupportedCipherSuites []*cipherSuite + +func init() { + utlsSupportedCipherSuites = append(cipherSuites, []*cipherSuite{ + {OLD_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, 32, 0, 12, ecdheRSAKA, + suiteECDHE | suiteTLS12, nil, nil, aeadChaCha20Poly1305}, + {OLD_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, 32, 0, 12, ecdheECDSAKA, + suiteECDHE | suiteECSign | suiteTLS12, nil, nil, aeadChaCha20Poly1305}, + }...) +} + +// EnableWeakCiphers allows utls connections to continue in some cases, when weak cipher was chosen. +// This provides better compatibility with servers on the web, but weakens security. Feel free +// to use this option if you establish additional secure connection inside of utls connection. +// This option does not change the shape of parrots (i.e. same ciphers will be offered either way). +// Must be called before establishing any connections. +func EnableWeakCiphers() { + utlsSupportedCipherSuites = append(cipherSuites, []*cipherSuite{ + {DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256, 32, 32, 16, rsaKA, + suiteTLS12, cipherAES, macSHA256, nil}, + + {DISABLED_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, 32, 48, 16, ecdheECDSAKA, + suiteECDHE | suiteECSign | suiteTLS12 | suiteSHA384, cipherAES, utlsMacSHA384, nil}, + {DISABLED_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, 32, 48, 16, ecdheRSAKA, + suiteECDHE | suiteTLS12 | suiteSHA384, cipherAES, utlsMacSHA384, nil}, + }...) +} + +func mapSlice[T any, U any](slice []T, transform func(T) U) []U { + newSlice := make([]U, 0, len(slice)) + for _, t := range slice { + newSlice = append(newSlice, transform(t)) + } + return newSlice +} + +func panicOnNil(caller string, params ...any) { + for i, p := range params { + if p == nil { + panic(fmt.Sprintf("tls: %s failed: the [%d] parameter is nil", caller, i)) + } + } +} + +func anyTrue[T any](slice []T, predicate func(i int, t *T) bool) bool { + for i := 0; i < len(slice); i++ { + if predicate(i, &slice[i]) { + return true + } + } + return false +} + +func allTrue[T any](slice []T, predicate func(i int, t *T) bool) bool { + for i := 0; i < len(slice); i++ { + if !predicate(i, &slice[i]) { + return false + } + } + return true +} + +func uAssert(condition bool, msg string) { + if !condition { + panic(msg) + } +} + +func sliceEq[T comparable](sliceA []T, sliceB []T) bool { + if len(sliceA) != len(sliceB) { + return false + } + for i := 0; i < len(sliceA); i++ { + if sliceA[i] != sliceB[i] { + return false + } + } + return true +} + +type Initializable interface { + // IsInitialized returns a boolean indicating whether the extension has been initialized. + // If false is returned, utls will initialize the extension. + IsInitialized() bool +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_conn.go b/backend/vendor/github.com/refraction-networking/utls/u_conn.go new file mode 100644 index 0000000..cc1f12d --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_conn.go @@ -0,0 +1,1000 @@ +// Copyright 2017 Google Inc. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bufio" + "bytes" + "context" + "crypto/cipher" + "encoding/binary" + "errors" + "fmt" + "hash" + "net" + "slices" + "strconv" + + "golang.org/x/crypto/cryptobyte" +) + +type ClientHelloBuildStatus int + +const NotBuilt ClientHelloBuildStatus = 0 +const BuildByUtls ClientHelloBuildStatus = 1 +const BuildByGoTLS ClientHelloBuildStatus = 2 + +type UConn struct { + *Conn + + Extensions []TLSExtension + ClientHelloID ClientHelloID + sessionController *sessionController + + clientHelloBuildStatus ClientHelloBuildStatus + clientHelloSpec *ClientHelloSpec + + HandshakeState PubClientHandshakeState + + greaseSeed [ssl_grease_last_index]uint16 + + omitSNIExtension bool + + // skipResumptionOnNilExtension is copied from `Config.PreferSkipResumptionOnNilExtension`. + // + // By default, if ClientHelloSpec is predefined or utls-generated (as opposed to HelloCustom), this flag will be updated to true. + skipResumptionOnNilExtension bool + + // certCompressionAlgs represents the set of advertised certificate compression + // algorithms, as specified in the ClientHello. This is only relevant client-side, for the + // server certificate. All other forms of certificate compression are unsupported. + certCompressionAlgs []CertCompressionAlgo + + // ech extension is a shortcut to the ECH extension in the Extensions slice if there is one. + ech ECHExtension + + // echCtx is the echContex returned by makeClientHello() + echCtx *echClientContext +} + +// UClient returns a new uTLS client, with behavior depending on clientHelloID. +// Config CAN be nil, but make sure to eventually specify ServerName. +func UClient(conn net.Conn, config *Config, clientHelloID ClientHelloID) *UConn { + if config == nil { + config = &Config{} + } + tlsConn := Conn{conn: conn, config: config, isClient: true} + handshakeState := PubClientHandshakeState{C: &tlsConn, Hello: &PubClientHelloMsg{}} + uconn := UConn{Conn: &tlsConn, ClientHelloID: clientHelloID, HandshakeState: handshakeState} + uconn.HandshakeState.uconn = &uconn + uconn.handshakeFn = uconn.clientHandshake + uconn.sessionController = newSessionController(&uconn) + uconn.utls.sessionController = uconn.sessionController + uconn.skipResumptionOnNilExtension = config.PreferSkipResumptionOnNilExtension || clientHelloID.Client != helloCustom + return &uconn +} + +// BuildHandshakeState behavior varies based on ClientHelloID and +// whether it was already called before. +// If HelloGolang: +// +// [only once] make default ClientHello and overwrite existing state +// +// If any other mimicking ClientHelloID is used: +// +// [only once] make ClientHello based on ID and overwrite existing state +// [each call] apply uconn.Extensions config to internal crypto/tls structures +// [each call] marshal ClientHello. +// +// BuildHandshakeState is automatically called before uTLS performs handshake, +// and should only be called explicitly to inspect/change fields of +// default/mimicked ClientHello. +// With the excpetion of session ticket and psk extensions, which cannot be changed +// after calling BuildHandshakeState, all other fields can be modified. +func (uconn *UConn) BuildHandshakeState() error { + return uconn.buildHandshakeState(true) +} + +// BuildHandshakeStateWithoutSession is the same as BuildHandshakeState, but does not +// set the session. This is only useful when you want to inspect the ClientHello before +// setting the session manually through SetSessionTicketExtension or SetPSKExtension. +// BuildHandshakeState is automatically called before uTLS performs handshake. +func (uconn *UConn) BuildHandshakeStateWithoutSession() error { + return uconn.buildHandshakeState(false) +} + +func (uconn *UConn) buildHandshakeState(loadSession bool) error { + if uconn.ClientHelloID == HelloGolang { + if uconn.clientHelloBuildStatus == BuildByGoTLS { + return nil + } + uAssert(uconn.clientHelloBuildStatus == NotBuilt, "BuildHandshakeState failed: invalid call, client hello has already been built by utls") + + // use default Golang ClientHello. + hello, keySharePrivate, ech, err := uconn.makeClientHello() + if err != nil { + return err + } + + uconn.HandshakeState.Hello = hello.getPublicPtr() + uconn.HandshakeState.State13.KeyShareKeys = keySharePrivate.ToPublic() + uconn.HandshakeState.C = uconn.Conn + uconn.echCtx = ech + uconn.clientHelloBuildStatus = BuildByGoTLS + } else { + uAssert(uconn.clientHelloBuildStatus == BuildByUtls || uconn.clientHelloBuildStatus == NotBuilt, "BuildHandshakeState failed: invalid call, client hello has already been built by go-tls") + if uconn.clientHelloBuildStatus == NotBuilt { + err := uconn.applyPresetByID(uconn.ClientHelloID) + if err != nil { + return err + } + if uconn.omitSNIExtension { + uconn.removeSNIExtension() + } + } + + err := uconn.ApplyConfig() + if err != nil { + return err + } + + if loadSession { + err = uconn.uLoadSession() + if err != nil { + return err + } + } + + err = uconn.MarshalClientHello() + if err != nil { + return err + } + + if loadSession { + uconn.uApplyPatch() + uconn.sessionController.finalCheck() + uconn.clientHelloBuildStatus = BuildByUtls + } + + } + return nil +} + +func (uconn *UConn) uLoadSession() error { + if cfg := uconn.config; cfg.SessionTicketsDisabled || cfg.ClientSessionCache == nil { + return nil + } + switch uconn.sessionController.shouldLoadSession() { + case shouldReturn: + case shouldSetTicket: + uconn.sessionController.setSessionTicketToUConn() + case shouldSetPsk: + uconn.sessionController.setPskToUConn() + case shouldLoad: + hello := uconn.HandshakeState.Hello.getPrivatePtr() + uconn.sessionController.utlsAboutToLoadSession() + session, earlySecret, binderKey, err := uconn.loadSession(hello) + if session == nil || err != nil { + return err + } + if session.version == VersionTLS12 { + // We use the session ticket extension for tls 1.2 session resumption + uconn.sessionController.initSessionTicketExt(session, hello.sessionTicket) + uconn.sessionController.setSessionTicketToUConn() + } else { + uconn.sessionController.initPskExt(session, earlySecret, binderKey, hello.pskIdentities) + } + } + + return nil +} + +func (uconn *UConn) uApplyPatch() { + helloLen := len(uconn.HandshakeState.Hello.Raw) + if uconn.sessionController.shouldUpdateBinders() { + uconn.sessionController.updateBinders() + uconn.sessionController.setPskToUConn() + } + uAssert(helloLen == len(uconn.HandshakeState.Hello.Raw), "tls: uApplyPatch Failed: the patch should never change the length of the marshaled clientHello") +} + +func (uconn *UConn) DidTls12Resume() bool { + return uconn.didResume +} + +// SetSessionState sets the session ticket, which may be preshared or fake. +// If session is nil, the body of session ticket extension will be unset, +// but the extension itself still MAY be present for mimicking purposes. +// Session tickets to be reused - use same cache on following connections. +// +// Deprecated: This method is deprecated in favor of SetSessionTicketExtension, +// as it only handles session override of TLS 1.2 +func (uconn *UConn) SetSessionState(session *ClientSessionState) error { + sessionTicketExt := &SessionTicketExtension{Initialized: true} + if session != nil { + sessionTicketExt.Ticket = session.session.ticket + sessionTicketExt.Session = session.session + } + return uconn.SetSessionTicketExtension(sessionTicketExt) +} + +// SetSessionTicket sets the session ticket extension. +// If extension is nil, this will be a no-op. +func (uconn *UConn) SetSessionTicketExtension(sessionTicketExt ISessionTicketExtension) error { + if uconn.config.SessionTicketsDisabled || uconn.config.ClientSessionCache == nil { + return fmt.Errorf("tls: SetSessionTicketExtension failed: session is disabled") + } + if sessionTicketExt == nil { + return nil + } + return uconn.sessionController.overrideSessionTicketExt(sessionTicketExt) +} + +// SetPskExtension sets the psk extension for tls 1.3 resumption. This is a no-op if the psk is nil. +func (uconn *UConn) SetPskExtension(pskExt PreSharedKeyExtension) error { + if uconn.config.SessionTicketsDisabled || uconn.config.ClientSessionCache == nil { + return fmt.Errorf("tls: SetPskExtension failed: session is disabled") + } + if pskExt == nil { + return nil + } + + uconn.HandshakeState.Hello.TicketSupported = true + return uconn.sessionController.overridePskExt(pskExt) +} + +// If you want session tickets to be reused - use same cache on following connections +func (uconn *UConn) SetSessionCache(cache ClientSessionCache) { + uconn.config.ClientSessionCache = cache + uconn.HandshakeState.Hello.TicketSupported = true +} + +// SetClientRandom sets client random explicitly. +// BuildHandshakeFirst() must be called before SetClientRandom. +// r must to be 32 bytes long. +func (uconn *UConn) SetClientRandom(r []byte) error { + if len(r) != 32 { + return errors.New("Incorrect client random length! Expected: 32, got: " + strconv.Itoa(len(r))) + } else { + uconn.HandshakeState.Hello.Random = make([]byte, 32) + copy(uconn.HandshakeState.Hello.Random, r) + return nil + } +} + +func (uconn *UConn) SetSNI(sni string) { + hname := hostnameInSNI(sni) + uconn.config.ServerName = hname + for _, ext := range uconn.Extensions { + sniExt, ok := ext.(*SNIExtension) + if ok { + sniExt.ServerName = hname + } + } +} + +// RemoveSNIExtension removes SNI from the list of extensions sent in ClientHello +// It returns an error when used with HelloGolang ClientHelloID +func (uconn *UConn) RemoveSNIExtension() error { + if uconn.ClientHelloID == HelloGolang { + return fmt.Errorf("cannot call RemoveSNIExtension on a UConn with a HelloGolang ClientHelloID") + } + uconn.omitSNIExtension = true + return nil +} + +func (uconn *UConn) removeSNIExtension() { + filteredExts := make([]TLSExtension, 0, len(uconn.Extensions)) + for _, e := range uconn.Extensions { + if _, ok := e.(*SNIExtension); !ok { + filteredExts = append(filteredExts, e) + } + } + uconn.Extensions = filteredExts +} + +// Handshake runs the client handshake using given clientHandshakeState +// Requires hs.hello, and, optionally, hs.session to be set. +func (c *UConn) Handshake() error { + return c.HandshakeContext(context.Background()) +} + +// HandshakeContext runs the client or server handshake +// protocol if it has not yet been run. +// +// The provided Context must be non-nil. If the context is canceled before +// the handshake is complete, the handshake is interrupted and an error is returned. +// Once the handshake has completed, cancellation of the context will not affect the +// connection. +func (c *UConn) HandshakeContext(ctx context.Context) error { + // Delegate to unexported method for named return + // without confusing documented signature. + return c.handshakeContext(ctx) +} + +func (c *UConn) handshakeContext(ctx context.Context) (ret error) { + // Fast sync/atomic-based exit if there is no handshake in flight and the + // last one succeeded without an error. Avoids the expensive context setup + // and mutex for most Read and Write calls. + if c.isHandshakeComplete.Load() { + return nil + } + + handshakeCtx, cancel := context.WithCancel(ctx) + // Note: defer this before starting the "interrupter" goroutine + // so that we can tell the difference between the input being canceled and + // this cancellation. In the former case, we need to close the connection. + defer cancel() + + // Start the "interrupter" goroutine, if this context might be canceled. + // (The background context cannot). + // + // The interrupter goroutine waits for the input context to be done and + // closes the connection if this happens before the function returns. + if c.quic != nil { + c.quic.cancelc = handshakeCtx.Done() + c.quic.cancel = cancel + } else if ctx.Done() != nil { + done := make(chan struct{}) + interruptRes := make(chan error, 1) + defer func() { + close(done) + if ctxErr := <-interruptRes; ctxErr != nil { + // Return context error to user. + ret = ctxErr + } + }() + go func() { + select { + case <-handshakeCtx.Done(): + // Close the connection, discarding the error + _ = c.conn.Close() + interruptRes <- handshakeCtx.Err() + case <-done: + interruptRes <- nil + } + }() + } + + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + + if err := c.handshakeErr; err != nil { + return err + } + if c.isHandshakeComplete.Load() { + return nil + } + + c.in.Lock() + defer c.in.Unlock() + + // [uTLS section begins] + if c.isClient { + err := c.BuildHandshakeState() + if err != nil { + return err + } + } + // [uTLS section ends] + c.handshakeErr = c.handshakeFn(handshakeCtx) + if c.handshakeErr == nil { + c.handshakes++ + } else { + // If an error occurred during the hadshake try to flush the + // alert that might be left in the buffer. + c.flush() + } + + if c.handshakeErr == nil && !c.isHandshakeComplete.Load() { + c.handshakeErr = errors.New("tls: internal error: handshake should have had a result") + } + if c.handshakeErr != nil && c.isHandshakeComplete.Load() { + panic("tls: internal error: handshake returned an error but is marked successful") + } + + if c.quic != nil { + if c.handshakeErr == nil { + c.quicHandshakeComplete() + // Provide the 1-RTT read secret now that the handshake is complete. + // The QUIC layer MUST NOT decrypt 1-RTT packets prior to completing + // the handshake (RFC 9001, Section 5.7). + c.quicSetReadSecret(QUICEncryptionLevelApplication, c.cipherSuite, c.in.trafficSecret) + } else { + var a alert + c.out.Lock() + if !errors.As(c.out.err, &a) { + a = alertInternalError + } + c.out.Unlock() + // Return an error which wraps both the handshake error and + // any alert error we may have sent, or alertInternalError + // if we didn't send an alert. + // Truncate the text of the alert to 0 characters. + c.handshakeErr = fmt.Errorf("%w%.0w", c.handshakeErr, AlertError(a)) + } + close(c.quic.blockedc) + close(c.quic.signalc) + } + + return c.handshakeErr +} + +// Copy-pasted from tls.Conn in its entirety. But c.Handshake() is now utls' one, not tls. +// Write writes data to the connection. +func (c *UConn) Write(b []byte) (int, error) { + // interlock with Close below + for { + x := c.activeCall.Load() + if x&1 != 0 { + return 0, net.ErrClosed + } + if c.activeCall.CompareAndSwap(x, x+2) { + defer c.activeCall.Add(-2) + break + } + } + + if err := c.Handshake(); err != nil { + return 0, err + } + + c.out.Lock() + defer c.out.Unlock() + + if err := c.out.err; err != nil { + return 0, err + } + + if !c.isHandshakeComplete.Load() { + return 0, alertInternalError + } + + if c.closeNotifySent { + return 0, errShutdown + } + + // SSL 3.0 and TLS 1.0 are susceptible to a chosen-plaintext + // attack when using block mode ciphers due to predictable IVs. + // This can be prevented by splitting each Application Data + // record into two records, effectively randomizing the IV. + // + // https://www.openssl.org/~bodo/tls-cbc.txt + // https://bugzilla.mozilla.org/show_bug.cgi?id=665814 + // https://www.imperialviolet.org/2012/01/15/beastfollowup.html + + var m int + if len(b) > 1 && c.vers <= VersionTLS10 { + if _, ok := c.out.cipher.(cipher.BlockMode); ok { + n, err := c.writeRecordLocked(recordTypeApplicationData, b[:1]) + if err != nil { + return n, c.out.setErrorLocked(err) + } + m, b = 1, b[1:] + } + } + + n, err := c.writeRecordLocked(recordTypeApplicationData, b) + return n + m, c.out.setErrorLocked(err) +} + +func (uconn *UConn) ApplyConfig() error { + for _, ext := range uconn.Extensions { + err := ext.writeToUConn(uconn) + if err != nil { + return err + } + } + return nil +} + +func (uconn *UConn) extensionsList() []uint16 { + + outerExts := []uint16{} + for _, ext := range uconn.Extensions { + buffer := cryptobyte.String(make([]byte, 2000)) + ext.Read(buffer) + var extension uint16 + buffer.ReadUint16(&extension) + outerExts = append(outerExts, extension) + } + return outerExts +} + +func (uconn *UConn) computeAndUpdateOuterECHExtension(inner *clientHelloMsg, ech *echClientContext, useKey bool) error { + // This function is mostly copied from + // https://github.com/refraction-networking/utls/blob/e430876b1d82fdf582efc57f3992d448e7ab3d8a/ech.go#L408 + var encapKey []byte + if useKey { + encapKey = ech.encapsulatedKey + } + + encodedInner, err := encodeInnerClientHelloReorderOuterExts(inner, int(ech.config.MaxNameLength), uconn.extensionsList()) + if err != nil { + return err + } + + encryptedLen := len(encodedInner) + 16 + outerECHExt, err := generateOuterECHExt(ech.config.ConfigID, ech.kdfID, ech.aeadID, encapKey, make([]byte, encryptedLen)) + if err != nil { + return err + } + + echExtIdx := slices.IndexFunc(uconn.Extensions, func(ext TLSExtension) bool { + _, ok := ext.(EncryptedClientHelloExtension) + return ok + }) + if echExtIdx < 0 { + return fmt.Errorf("extension satisfying EncryptedClientHelloExtension not present") + } + oldExt := uconn.Extensions[echExtIdx] + + uconn.Extensions[echExtIdx] = &GenericExtension{ + Id: extensionEncryptedClientHello, + Data: outerECHExt, + } + + if err := uconn.MarshalClientHelloNoECH(); err != nil { + return err + } + + serializedOuter := uconn.HandshakeState.Hello.Raw + serializedOuter = serializedOuter[4:] + encryptedInner, err := ech.hpkeContext.Seal(serializedOuter, encodedInner) + if err != nil { + return err + } + outerECHExt, err = generateOuterECHExt(ech.config.ConfigID, ech.kdfID, ech.aeadID, encapKey, encryptedInner) + if err != nil { + return err + } + uconn.Extensions[echExtIdx] = &GenericExtension{ + Id: extensionEncryptedClientHello, + Data: outerECHExt, + } + + if err := uconn.MarshalClientHelloNoECH(); err != nil { + return err + } + + uconn.Extensions[echExtIdx] = oldExt + return nil + +} + +func (uconn *UConn) MarshalClientHello() error { + if len(uconn.config.EncryptedClientHelloConfigList) > 0 { + inner, _, ech, err := uconn.makeClientHello() + if err != nil { + return err + } + + // copy compressed extensions to the ClientHelloInner + inner.keyShares = KeyShares(uconn.HandshakeState.Hello.KeyShares).ToPrivate() + inner.supportedSignatureAlgorithms = uconn.HandshakeState.Hello.SupportedSignatureAlgorithms + inner.sessionId = uconn.HandshakeState.Hello.SessionId + inner.supportedCurves = uconn.HandshakeState.Hello.SupportedCurves + + ech.innerHello = inner + + sniExtIdex := slices.IndexFunc(uconn.Extensions, func(ext TLSExtension) bool { + _, ok := ext.(*SNIExtension) + return ok + }) + if sniExtIdex < 0 { + return fmt.Errorf("sni extension missing while attempting ECH") + } + + uconn.Extensions[sniExtIdex] = &SNIExtension{ + ServerName: string(ech.config.PublicName), + } + + uconn.computeAndUpdateOuterECHExtension(inner, ech, true) + + uconn.echCtx = ech + return nil + } + + if err := uconn.MarshalClientHelloNoECH(); err != nil { + return err + } + + return nil + +} + +// MarshalClientHelloNoECH marshals ClientHello as if there was no +// ECH extension present. +func (uconn *UConn) MarshalClientHelloNoECH() error { + hello := uconn.HandshakeState.Hello + headerLength := 2 + 32 + 1 + len(hello.SessionId) + + 2 + len(hello.CipherSuites)*2 + + 1 + len(hello.CompressionMethods) + + extensionsLen := 0 + var paddingExt *UtlsPaddingExtension // reference to padding extension, if present + for _, ext := range uconn.Extensions { + if pe, ok := ext.(*UtlsPaddingExtension); !ok { + // If not padding - just add length of extension to total length + extensionsLen += ext.Len() + } else { + // If padding - process it later + if paddingExt == nil { + paddingExt = pe + } else { + return errors.New("multiple padding extensions") + } + } + } + + if paddingExt != nil { + // determine padding extension presence and length + paddingExt.Update(headerLength + 4 + extensionsLen + 2) + extensionsLen += paddingExt.Len() + } + + helloLen := headerLength + if len(uconn.Extensions) > 0 { + helloLen += 2 + extensionsLen // 2 bytes for extensions' length + } + + helloBuffer := bytes.Buffer{} + bufferedWriter := bufio.NewWriterSize(&helloBuffer, helloLen+4) // 1 byte for tls record type, 3 for length + // We use buffered Writer to avoid checking write errors after every Write(): whenever first error happens + // Write() will become noop, and error will be accessible via Flush(), which is called once in the end + + binary.Write(bufferedWriter, binary.BigEndian, typeClientHello) + helloLenBytes := []byte{byte(helloLen >> 16), byte(helloLen >> 8), byte(helloLen)} // poor man's uint24 + binary.Write(bufferedWriter, binary.BigEndian, helloLenBytes) + binary.Write(bufferedWriter, binary.BigEndian, hello.Vers) + + binary.Write(bufferedWriter, binary.BigEndian, hello.Random) + + binary.Write(bufferedWriter, binary.BigEndian, uint8(len(hello.SessionId))) + binary.Write(bufferedWriter, binary.BigEndian, hello.SessionId) + + binary.Write(bufferedWriter, binary.BigEndian, uint16(len(hello.CipherSuites)<<1)) + for _, suite := range hello.CipherSuites { + binary.Write(bufferedWriter, binary.BigEndian, suite) + } + + binary.Write(bufferedWriter, binary.BigEndian, uint8(len(hello.CompressionMethods))) + binary.Write(bufferedWriter, binary.BigEndian, hello.CompressionMethods) + + if len(uconn.Extensions) > 0 { + binary.Write(bufferedWriter, binary.BigEndian, uint16(extensionsLen)) + for _, ext := range uconn.Extensions { + if _, err := bufferedWriter.ReadFrom(ext); err != nil { + return err + } + } + } + + err := bufferedWriter.Flush() + if err != nil { + return err + } + + if helloBuffer.Len() != 4+helloLen { + return errors.New("utls: unexpected ClientHello length. Expected: " + strconv.Itoa(4+helloLen) + + ". Got: " + strconv.Itoa(helloBuffer.Len())) + } + + hello.Raw = helloBuffer.Bytes() + return nil +} + +// get current state of cipher and encrypt zeros to get keystream +func (uconn *UConn) GetOutKeystream(length int) ([]byte, error) { + zeros := make([]byte, length) + + if outCipher, ok := uconn.out.cipher.(cipher.AEAD); ok { + // AEAD.Seal() does not mutate internal state, other ciphers might + return outCipher.Seal(nil, uconn.out.seq[:], zeros, nil), nil + } + return nil, errors.New("could not convert OutCipher to cipher.AEAD") +} + +// SetTLSVers sets min and max TLS version in all appropriate places. +// Function will use first non-zero version parsed in following order: +// 1. Provided minTLSVers, maxTLSVers +// 2. specExtensions may have SupportedVersionsExtension +// 3. [default] min = TLS 1.0, max = TLS 1.2 +// +// Error is only returned if things are in clearly undesirable state +// to help user fix them. +func (uconn *UConn) SetTLSVers(minTLSVers, maxTLSVers uint16, specExtensions []TLSExtension) error { + if minTLSVers == 0 && maxTLSVers == 0 { + // if version is not set explicitly in the ClientHelloSpec, check the SupportedVersions extension + supportedVersionsExtensionsPresent := 0 + for _, e := range specExtensions { + switch ext := e.(type) { + case *SupportedVersionsExtension: + findVersionsInSupportedVersionsExtensions := func(versions []uint16) (uint16, uint16) { + // returns (minVers, maxVers) + minVers := uint16(0) + maxVers := uint16(0) + for _, vers := range versions { + if isGREASEUint16(vers) { + continue + } + if maxVers < vers || maxVers == 0 { + maxVers = vers + } + if minVers > vers || minVers == 0 { + minVers = vers + } + } + return minVers, maxVers + } + + supportedVersionsExtensionsPresent += 1 + minTLSVers, maxTLSVers = findVersionsInSupportedVersionsExtensions(ext.Versions) + if minTLSVers == 0 && maxTLSVers == 0 { + return fmt.Errorf("SupportedVersions extension has invalid Versions field") + } // else: proceed + } + } + switch supportedVersionsExtensionsPresent { + case 0: + // if mandatory for TLS 1.3 extension is not present, just default to 1.2 + minTLSVers = VersionTLS10 + maxTLSVers = VersionTLS12 + case 1: + default: + return fmt.Errorf("uconn.Extensions contains %v separate SupportedVersions extensions", + supportedVersionsExtensionsPresent) + } + } + + if minTLSVers < VersionTLS10 || minTLSVers > VersionTLS13 { + return fmt.Errorf("uTLS does not support 0x%X as min version", minTLSVers) + } + + if maxTLSVers < VersionTLS10 || maxTLSVers > VersionTLS13 { + return fmt.Errorf("uTLS does not support 0x%X as max version", maxTLSVers) + } + + uconn.HandshakeState.Hello.SupportedVersions = makeSupportedVersions(minTLSVers, maxTLSVers) + if uconn.config.EncryptedClientHelloConfigList == nil { + uconn.config.MinVersion = minTLSVers + uconn.config.MaxVersion = maxTLSVers + } + + return nil +} + +func (uconn *UConn) SetUnderlyingConn(c net.Conn) { + uconn.Conn.conn = c +} + +func (uconn *UConn) GetUnderlyingConn() net.Conn { + return uconn.Conn.conn +} + +// MakeConnWithCompleteHandshake allows to forge both server and client side TLS connections. +// Major Hack Alert. +func MakeConnWithCompleteHandshake(tcpConn net.Conn, version uint16, cipherSuite uint16, masterSecret []byte, clientRandom []byte, serverRandom []byte, isClient bool) *Conn { + tlsConn := &Conn{conn: tcpConn, config: &Config{}, isClient: isClient} + cs := cipherSuiteByID(cipherSuite) + if cs != nil { + // This is mostly borrowed from establishKeys() + clientMAC, serverMAC, clientKey, serverKey, clientIV, serverIV := + keysFromMasterSecret(version, cs, masterSecret, clientRandom, serverRandom, + cs.macLen, cs.keyLen, cs.ivLen) + + var clientCipher, serverCipher interface{} + var clientHash, serverHash hash.Hash + if cs.cipher != nil { + clientCipher = cs.cipher(clientKey, clientIV, true /* for reading */) + clientHash = cs.mac(clientMAC) + serverCipher = cs.cipher(serverKey, serverIV, false /* not for reading */) + serverHash = cs.mac(serverMAC) + } else { + clientCipher = cs.aead(clientKey, clientIV) + serverCipher = cs.aead(serverKey, serverIV) + } + + if isClient { + tlsConn.in.prepareCipherSpec(version, serverCipher, serverHash) + tlsConn.out.prepareCipherSpec(version, clientCipher, clientHash) + } else { + tlsConn.in.prepareCipherSpec(version, clientCipher, clientHash) + tlsConn.out.prepareCipherSpec(version, serverCipher, serverHash) + } + + // skip the handshake states + tlsConn.isHandshakeComplete.Store(true) + tlsConn.cipherSuite = cipherSuite + tlsConn.haveVers = true + tlsConn.vers = version + + // Update to the new cipher specs + // and consume the finished messages + tlsConn.in.changeCipherSpec() + tlsConn.out.changeCipherSpec() + + tlsConn.in.incSeq() + tlsConn.out.incSeq() + + return tlsConn + } else { + // TODO: Support TLS 1.3 Cipher Suites + return nil + } +} + +func makeSupportedVersions(minVers, maxVers uint16) []uint16 { + a := make([]uint16, maxVers-minVers+1) + for i := range a { + a[i] = maxVers - uint16(i) + } + return a +} + +// Extending (*Conn).readHandshake() to support more customized handshake messages. +func (c *Conn) utlsHandshakeMessageType(msgType byte) (handshakeMessage, error) { + switch msgType { + case utlsTypeCompressedCertificate: + return new(utlsCompressedCertificateMsg), nil + case utlsTypeEncryptedExtensions: + if c.isClient { + return new(encryptedExtensionsMsg), nil + } else { + return new(utlsClientEncryptedExtensionsMsg), nil + } + default: + return nil, c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + } +} + +// Extending (*Conn).connectionStateLocked() +func (c *Conn) utlsConnectionStateLocked(state *ConnectionState) { + state.PeerApplicationSettings = c.utls.peerApplicationSettings + state.ECHRetryConfigs = c.utls.echRetryConfigs +} + +type utlsConnExtraFields struct { + // Application Settings (ALPS) + hasApplicationSettings bool + peerApplicationSettings []byte + localApplicationSettings []byte + + // Encrypted Client Hello (ECH) + echRetryConfigs []ECHConfig + + sessionController *sessionController +} + +// Read reads data from the connection. +// +// As Read calls [Conn.Handshake], in order to prevent indefinite blocking a deadline +// must be set for both Read and [Conn.Write] before Read is called when the handshake +// has not yet completed. See [Conn.SetDeadline], [Conn.SetReadDeadline], and +// [Conn.SetWriteDeadline]. +func (c *UConn) Read(b []byte) (int, error) { + if err := c.Handshake(); err != nil { + return 0, err + } + if len(b) == 0 { + // Put this after Handshake, in case people were calling + // Read(nil) for the side effect of the Handshake. + return 0, nil + } + + c.in.Lock() + defer c.in.Unlock() + + for c.input.Len() == 0 { + if err := c.readRecord(); err != nil { + return 0, err + } + for c.hand.Len() > 0 { + if err := c.handlePostHandshakeMessage(); err != nil { + return 0, err + } + } + } + + n, _ := c.input.Read(b) + + // If a close-notify alert is waiting, read it so that we can return (n, + // EOF) instead of (n, nil), to signal to the HTTP response reading + // goroutine that the connection is now closed. This eliminates a race + // where the HTTP response reading goroutine would otherwise not observe + // the EOF until its next read, by which time a client goroutine might + // have already tried to reuse the HTTP connection for a new request. + // See https://golang.org/cl/76400046 and https://golang.org/issue/3514 + if n != 0 && c.input.Len() == 0 && c.rawInput.Len() > 0 && + recordType(c.rawInput.Bytes()[0]) == recordTypeAlert { + if err := c.readRecord(); err != nil { + return n, err // will be io.EOF on closeNotify + } + } + + return n, nil +} + +// handleRenegotiation processes a HelloRequest handshake message. +func (c *UConn) handleRenegotiation() error { + if c.vers == VersionTLS13 { + return errors.New("tls: internal error: unexpected renegotiation") + } + + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + + helloReq, ok := msg.(*helloRequestMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(helloReq, msg) + } + + if !c.isClient { + return c.sendAlert(alertNoRenegotiation) + } + + switch c.config.Renegotiation { + case RenegotiateNever: + return c.sendAlert(alertNoRenegotiation) + case RenegotiateOnceAsClient: + if c.handshakes > 1 { + return c.sendAlert(alertNoRenegotiation) + } + case RenegotiateFreelyAsClient: + // Ok. + default: + c.sendAlert(alertInternalError) + return errors.New("tls: unknown Renegotiation value") + } + + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + + c.isHandshakeComplete.Store(false) + + // [uTLS section begins] + if err = c.BuildHandshakeState(); err != nil { + return err + } + // [uTLS section ends] + if c.handshakeErr = c.clientHandshake(context.Background()); c.handshakeErr == nil { + c.handshakes++ + } + return c.handshakeErr +} + +// handlePostHandshakeMessage processes a handshake message arrived after the +// handshake is complete. Up to TLS 1.2, it indicates the start of a renegotiation. +func (c *UConn) handlePostHandshakeMessage() error { + if c.vers != VersionTLS13 { + return c.handleRenegotiation() + } + + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + c.retryCount++ + if c.retryCount > maxUselessRecords { + c.sendAlert(alertUnexpectedMessage) + return c.in.setErrorLocked(errors.New("tls: too many non-advancing records")) + } + + switch msg := msg.(type) { + case *newSessionTicketMsgTLS13: + return c.handleNewSessionTicket(msg) + case *keyUpdateMsg: + return c.handleKeyUpdate(msg) + } + // The QUIC layer is supposed to treat an unexpected post-handshake CertificateRequest + // as a QUIC-level PROTOCOL_VIOLATION error (RFC 9001, Section 4.4). Returning an + // unexpected_message alert here doesn't provide it with enough information to distinguish + // this condition from other unexpected messages. This is probably fine. + c.sendAlert(alertUnexpectedMessage) + return fmt.Errorf("tls: received unexpected handshake message of type %T", msg) +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_ech.go b/backend/vendor/github.com/refraction-networking/utls/u_ech.go new file mode 100644 index 0000000..fad8dd0 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_ech.go @@ -0,0 +1,329 @@ +package tls + +import ( + "crypto/rand" + "errors" + "fmt" + "io" + "math/big" + "sync" + + "github.com/cloudflare/circl/hpke" + "github.com/refraction-networking/utls/dicttls" + "golang.org/x/crypto/cryptobyte" +) + +// Unstable API: This is a work in progress and may change in the future. Using +// it in your application may cause your application to break when updating to +// a new version of uTLS. + +const ( + OuterClientHello byte = 0x00 + InnerClientHello byte = 0x01 +) + +type EncryptedClientHelloExtension interface { + // TLSExtension must be implemented by all EncryptedClientHelloExtension implementations. + TLSExtension + + // Configure configures the EncryptedClientHelloExtension with the given slice of ECHConfig. + Configure([]ECHConfig) error + + // MarshalClientHello is called by (*UConn).MarshalClientHello() when an ECH extension + // is present to allow the ECH extension to take control of the generation of the + // entire ClientHello message. + MarshalClientHello(*UConn) error + + mustEmbedUnimplementedECHExtension() +} + +type ECHExtension = EncryptedClientHelloExtension // alias + +// type guard: GREASEEncryptedClientHelloExtension must implement EncryptedClientHelloExtension +var ( + _ EncryptedClientHelloExtension = (*GREASEEncryptedClientHelloExtension)(nil) + + _ EncryptedClientHelloExtension = (*UnimplementedECHExtension)(nil) +) + +type GREASEEncryptedClientHelloExtension struct { + CandidateCipherSuites []HPKESymmetricCipherSuite + cipherSuite HPKESymmetricCipherSuite // randomly picked from CandidateCipherSuites or generated if empty + CandidateConfigIds []uint8 + configId uint8 // randomly picked from CandidateConfigIds or generated if empty + EncapsulatedKey []byte // if empty, will generate random bytes + CandidatePayloadLens []uint16 // Pre-encryption. If 0, will pick 128(+16=144) + payload []byte // payload should be calculated ONCE and stored here, HRR will reuse this + + initOnce sync.Once + + UnimplementedECHExtension +} + +type GREASEECHExtension = GREASEEncryptedClientHelloExtension // alias + +// init initializes the GREASEEncryptedClientHelloExtension with random values if they are not set. +// +// Based on cloudflare/go's echGenerateGreaseExt() +func (g *GREASEEncryptedClientHelloExtension) init() error { + var initErr error + g.initOnce.Do(func() { + // Set the config_id field to a random byte. + // + // Note: must not reuse this extension unless for HRR. It is required + // to generate new random bytes for config_id for each new ClientHello, + // but reuse the same config_id for HRR. + if len(g.CandidateConfigIds) == 0 { + var b []byte = make([]byte, 1) + _, err := rand.Read(b[:]) + if err != nil { + initErr = fmt.Errorf("error generating random byte for config_id: %w", err) + return + } + g.configId = b[0] + } else { + // randomly pick one from the list + rndIndex, err := rand.Int(rand.Reader, big.NewInt(int64(len(g.CandidateConfigIds)))) + if err != nil { + initErr = fmt.Errorf("error generating random index for config_id: %w", err) + return + } + g.configId = g.CandidateConfigIds[rndIndex.Int64()] + } + + // Set the cipher_suite field to a supported HpkeSymmetricCipherSuite. + // The selection SHOULD vary to exercise all supported configurations, + // but MAY be held constant for successive connections to the same server + // in the same session. + if len(g.CandidateCipherSuites) == 0 { + _, kdf, aead := defaultHPKESuite.Params() + g.cipherSuite = HPKESymmetricCipherSuite{uint16(kdf), uint16(aead)} + } else { + // randomly pick one from the list + rndIndex, err := rand.Int(rand.Reader, big.NewInt(int64(len(g.CandidateCipherSuites)))) + if err != nil { + initErr = fmt.Errorf("error generating random index for cipher_suite: %w", err) + return + } + g.cipherSuite = HPKESymmetricCipherSuite{ + g.CandidateCipherSuites[rndIndex.Int64()].KdfId, + g.CandidateCipherSuites[rndIndex.Int64()].AeadId, + } + // aead = hpke.AEAD(g.cipherSuite.AeadId) + } + + if len(g.EncapsulatedKey) == 0 { + // use default random key from cloudflare/go + kem := hpke.KEM_X25519_HKDF_SHA256 + + pk, err := kem.Scheme().UnmarshalBinaryPublicKey(dummyX25519PublicKey) + if err != nil { + initErr = fmt.Errorf("tls: grease ech: failed to parse dummy public key: %w", err) + return + } + sender, err := defaultHPKESuite.NewSender(pk, nil) + if err != nil { + initErr = fmt.Errorf("tls: grease ech: failed to create sender: %w", err) + return + } + + g.EncapsulatedKey, _, err = sender.Setup(rand.Reader) + if err != nil { + initErr = fmt.Errorf("tls: grease ech: failed to setup encapsulated key: %w", err) + return + } + } + + if len(g.payload) == 0 { + if len(g.CandidatePayloadLens) == 0 { + g.CandidatePayloadLens = []uint16{128} + } + + // randomly pick one from the list + rndIndex, err := rand.Int(rand.Reader, big.NewInt(int64(len(g.CandidatePayloadLens)))) + if err != nil { + initErr = fmt.Errorf("error generating random index for payload length: %w", err) + return + } + + initErr = g.randomizePayload(g.CandidatePayloadLens[rndIndex.Int64()]) + } + }) + + return initErr +} + +func (g *GREASEEncryptedClientHelloExtension) randomizePayload(encodedHelloInnerLen uint16) error { + if len(g.payload) != 0 { + return errors.New("tls: grease ech: regenerating payload is forbidden") + } + + aead := hpke.AEAD(g.cipherSuite.AeadId) + g.payload = make([]byte, int(aead.CipherLen(uint(encodedHelloInnerLen)))) + _, err := rand.Read(g.payload) + if err != nil { + return fmt.Errorf("tls: generating grease ech payload: %w", err) + } + return nil +} + +// writeToUConn implements TLSExtension. +// +// For ECH extensions, writeToUConn simply points the ech field in UConn to the extension. +func (g *GREASEEncryptedClientHelloExtension) writeToUConn(uconn *UConn) error { + uconn.ech = g + return uconn.MarshalClientHelloNoECH() +} + +// Len implements TLSExtension. +func (g *GREASEEncryptedClientHelloExtension) Len() int { + g.init() + return 2 + 2 + 1 /* ClientHello Type */ + 4 /* CipherSuite */ + 1 /* Config ID */ + 2 + len(g.EncapsulatedKey) + 2 + len(g.payload) +} + +// Read implements TLSExtension. +func (g *GREASEEncryptedClientHelloExtension) Read(b []byte) (int, error) { + if len(b) < g.Len() { + return 0, io.ErrShortBuffer + } + + b[0] = byte(utlsExtensionECH >> 8) + b[1] = byte(utlsExtensionECH & 0xFF) + b[2] = byte((g.Len() - 4) >> 8) + b[3] = byte((g.Len() - 4) & 0xFF) + b[4] = OuterClientHello + b[5] = byte(g.cipherSuite.KdfId >> 8) + b[6] = byte(g.cipherSuite.KdfId & 0xFF) + b[7] = byte(g.cipherSuite.AeadId >> 8) + b[8] = byte(g.cipherSuite.AeadId & 0xFF) + b[9] = g.configId + b[10] = byte(len(g.EncapsulatedKey) >> 8) + b[11] = byte(len(g.EncapsulatedKey) & 0xFF) + copy(b[12:], g.EncapsulatedKey) + b[12+len(g.EncapsulatedKey)] = byte(len(g.payload) >> 8) + b[12+len(g.EncapsulatedKey)+1] = byte(len(g.payload) & 0xFF) + copy(b[12+len(g.EncapsulatedKey)+2:], g.payload) + + return g.Len(), io.EOF +} + +// Configure implements EncryptedClientHelloExtension. +func (*GREASEEncryptedClientHelloExtension) Configure([]ECHConfig) error { + return nil // no-op, it is not possible to configure a GREASE extension for now +} + +// MarshalClientHello implements EncryptedClientHelloExtension. +func (*GREASEEncryptedClientHelloExtension) MarshalClientHello(*UConn) error { + return errors.New("tls: grease ech: MarshalClientHello() is not implemented, use (*UConn).MarshalClientHello() instead") +} + +// Write implements TLSExtensionWriter. +func (g *GREASEEncryptedClientHelloExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + + // Check the extension type, it must be OuterClientHello otherwise we are not + // parsing the correct extension + var chType uint8 // 0: outer, 1: inner + var ignored cryptobyte.String + if !extData.ReadUint8(&chType) || chType != 0 { + return fullLen, errors.New("bad Client Hello type, expected 0, got " + fmt.Sprintf("%d", chType)) + } + + // Parse the cipher suite + if !extData.ReadUint16(&g.cipherSuite.KdfId) || !extData.ReadUint16(&g.cipherSuite.AeadId) { + return fullLen, errors.New("bad cipher suite") + } + if g.cipherSuite.KdfId != dicttls.HKDF_SHA256 && + g.cipherSuite.KdfId != dicttls.HKDF_SHA384 && + g.cipherSuite.KdfId != dicttls.HKDF_SHA512 { + return fullLen, errors.New("bad KDF ID: " + fmt.Sprintf("%d", g.cipherSuite.KdfId)) + } + if g.cipherSuite.AeadId != dicttls.AEAD_AES_128_GCM && + g.cipherSuite.AeadId != dicttls.AEAD_AES_256_GCM && + g.cipherSuite.AeadId != dicttls.AEAD_CHACHA20_POLY1305 { + return fullLen, errors.New("bad AEAD ID: " + fmt.Sprintf("%d", g.cipherSuite.AeadId)) + } + g.CandidateCipherSuites = []HPKESymmetricCipherSuite{g.cipherSuite} + + // GREASE the ConfigId + if !extData.ReadUint8(&g.configId) { + return fullLen, errors.New("bad config ID") + } + // we don't write to CandidateConfigIds because we don't really want to reuse the same config_id + + // GREASE the EncapsulatedKey + if !extData.ReadUint16LengthPrefixed(&ignored) { + return fullLen, errors.New("bad encapsulated key") + } + g.EncapsulatedKey = make([]byte, len(ignored)) + n, err := rand.Read(g.EncapsulatedKey) + if err != nil { + return fullLen, fmt.Errorf("tls: generating grease ech encapsulated key: %w", err) + } + if n != len(g.EncapsulatedKey) { + return fullLen, fmt.Errorf("tls: generating grease ech encapsulated key: short read for %d bytes", len(ignored)-n) + } + + // GREASE the payload + if !extData.ReadUint16LengthPrefixed(&ignored) { + return fullLen, errors.New("bad payload") + } + aead := hpke.AEAD(g.cipherSuite.AeadId) + g.CandidatePayloadLens = []uint16{uint16(len(ignored) - int(aead.CipherLen(0)))} + + return fullLen, nil +} + +// UnimplementedECHExtension is a placeholder for an ECH extension that is not implemented. +// All implementations of EncryptedClientHelloExtension should embed this struct to ensure +// forward compatibility. +type UnimplementedECHExtension struct{} + +// writeToUConn implements TLSExtension. +func (*UnimplementedECHExtension) writeToUConn(_ *UConn) error { + return errors.New("tls: unimplemented ECHExtension") +} + +// Len implements TLSExtension. +func (*UnimplementedECHExtension) Len() int { + return 0 +} + +// Read implements TLSExtension. +func (*UnimplementedECHExtension) Read(_ []byte) (int, error) { + return 0, errors.New("tls: unimplemented ECHExtension") +} + +// Configure implements EncryptedClientHelloExtension. +func (*UnimplementedECHExtension) Configure([]ECHConfig) error { + return errors.New("tls: unimplemented ECHExtension") +} + +// MarshalClientHello implements EncryptedClientHelloExtension. +func (*UnimplementedECHExtension) MarshalClientHello(*UConn) error { + return errors.New("tls: unimplemented ECHExtension") +} + +// mustEmbedUnimplementedECHExtension is a noop function but is required to +// ensure forward compatibility. +func (*UnimplementedECHExtension) mustEmbedUnimplementedECHExtension() { + panic("mustEmbedUnimplementedECHExtension() is not implemented") +} + +// BoringGREASEECH returns a GREASE scheme BoringSSL uses by default. +func BoringGREASEECH() *GREASEEncryptedClientHelloExtension { + return &GREASEEncryptedClientHelloExtension{ + CandidateCipherSuites: []HPKESymmetricCipherSuite{ + { + KdfId: dicttls.HKDF_SHA256, + AeadId: dicttls.AEAD_AES_128_GCM, + }, + { + KdfId: dicttls.HKDF_SHA256, + AeadId: dicttls.AEAD_CHACHA20_POLY1305, + }, + }, + CandidatePayloadLens: []uint16{128, 160, 192, 224}, // +16: 144, 176, 208, 240 + } +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_ech_config.go b/backend/vendor/github.com/refraction-networking/utls/u_ech_config.go new file mode 100644 index 0000000..633c7b1 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_ech_config.go @@ -0,0 +1,135 @@ +package tls + +import ( + "errors" + "fmt" + + "github.com/cloudflare/circl/hpke" + "golang.org/x/crypto/cryptobyte" +) + +type ECHConfigContents struct { + KeyConfig HPKEKeyConfig + MaximumNameLength uint8 + PublicName []byte + // Extensions []TLSExtension // ignored for now + rawExtensions []byte +} + +func UnmarshalECHConfigContents(contents []byte) (ECHConfigContents, error) { + var ( + contentCryptobyte = cryptobyte.String(contents) + config ECHConfigContents + ) + + // Parse KeyConfig + var t cryptobyte.String + if !contentCryptobyte.ReadUint8(&config.KeyConfig.ConfigId) || + !contentCryptobyte.ReadUint16(&config.KeyConfig.KemId) || + !contentCryptobyte.ReadUint16LengthPrefixed(&t) || + !t.ReadBytes(&config.KeyConfig.rawPublicKey, len(t)) || + !contentCryptobyte.ReadUint16LengthPrefixed(&t) || + len(t)%4 != 0 { + return config, errors.New("error parsing KeyConfig") + } + + // Parse all CipherSuites in KeyConfig + config.KeyConfig.CipherSuites = nil + for !t.Empty() { + var kdfId, aeadId uint16 + if !t.ReadUint16(&kdfId) || !t.ReadUint16(&aeadId) { + // This indicates an internal bug. + panic("internal error while parsing contents.cipher_suites") + } + config.KeyConfig.CipherSuites = append(config.KeyConfig.CipherSuites, HPKESymmetricCipherSuite{kdfId, aeadId}) + } + + if !contentCryptobyte.ReadUint8(&config.MaximumNameLength) || + !contentCryptobyte.ReadUint8LengthPrefixed(&t) || + !t.ReadBytes(&config.PublicName, len(t)) || + !contentCryptobyte.ReadUint16LengthPrefixed(&t) || + !t.ReadBytes(&config.rawExtensions, len(t)) || + !contentCryptobyte.Empty() { + return config, errors.New("error parsing ECHConfigContents") + } + return config, nil +} + +func (echcc *ECHConfigContents) ParsePublicKey() error { + var err error + kem := hpke.KEM(echcc.KeyConfig.KemId) + if !kem.IsValid() { + return errors.New("invalid KEM") + } + echcc.KeyConfig.PublicKey, err = kem.Scheme().UnmarshalBinaryPublicKey(echcc.KeyConfig.rawPublicKey) + if err != nil { + return fmt.Errorf("error parsing public key: %s", err) + } + return nil +} + +type ECHConfig struct { + Version uint16 + Length uint16 + Contents ECHConfigContents + + raw []byte +} + +// UnmarshalECHConfigs parses a sequence of ECH configurations. +// +// Ported from cloudflare/go +func UnmarshalECHConfigs(raw []byte) ([]ECHConfig, error) { + var ( + err error + config ECHConfig + t, contents cryptobyte.String + ) + configs := make([]ECHConfig, 0) + s := cryptobyte.String(raw) + if !s.ReadUint16LengthPrefixed(&t) || !s.Empty() { + return configs, errors.New("error parsing configs") + } + raw = raw[2:] +ConfigsLoop: + for !t.Empty() { + l := len(t) + if !t.ReadUint16(&config.Version) || + !t.ReadUint16LengthPrefixed(&contents) { + return nil, errors.New("error parsing config") + } + config.Length = uint16(len(contents)) + n := l - len(t) + config.raw = raw[:n] + raw = raw[n:] + + if config.Version != utlsExtensionECH { + continue ConfigsLoop + } + + /**** cloudflare/go original ****/ + // if !readConfigContents(&contents, &config) { + // return nil, errors.New("error parsing config contents") + // } + + config.Contents, err = UnmarshalECHConfigContents(contents) + if err != nil { + return nil, fmt.Errorf("error parsing config contents: %s", err) + } + + /**** cloudflare/go original ****/ + // kem := hpke.KEM(config.kemId) + // if !kem.IsValid() { + // continue ConfigsLoop + // } + // config.pk, err = kem.Scheme().UnmarshalBinaryPublicKey(config.rawPublicKey) + // if err != nil { + // return nil, fmt.Errorf("error parsing public key: %s", err) + // } + + config.Contents.ParsePublicKey() // parse the bytes into a public key + + configs = append(configs, config) + } + return configs, nil +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_fingerprinter.go b/backend/vendor/github.com/refraction-networking/utls/u_fingerprinter.go new file mode 100644 index 0000000..61afc73 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_fingerprinter.go @@ -0,0 +1,74 @@ +// Copyright 2017 Google Inc. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +// Fingerprinter is a struct largely for holding options for the FingerprintClientHello func +type Fingerprinter struct { + // AllowBluntMimicry will ensure that unknown extensions are + // passed along into the resulting ClientHelloSpec as-is + // WARNING: there could be numerous subtle issues with ClientHelloSpecs + // that are generated with this flag which could compromise security and/or mimicry + AllowBluntMimicry bool + // AlwaysAddPadding will always add a UtlsPaddingExtension with BoringPaddingStyle + // at the end of the extensions list if it isn't found in the fingerprinted hello. + // This could be useful in scenarios where the hello you are fingerprinting does not + // have any padding, but you suspect that other changes you make to the final hello + // (including things like different SNI lengths) would cause padding to be necessary + AlwaysAddPadding bool + + RealPSKResumption bool // if set, PSK extension (if any) will be real PSK extension, otherwise it will be fake PSK extension +} + +// FingerprintClientHello returns a ClientHelloSpec which is based on the +// ClientHello that is passed in as the data argument +// +// If the ClientHello passed in has extensions that are not recognized or cannot be handled +// it will return a non-nil error and a nil *ClientHelloSpec value +// +// The data should be the full tls record, including the record type/version/length header +// as well as the handshake type/length/version header +// https://tools.ietf.org/html/rfc5246#section-6.2 +// https://tools.ietf.org/html/rfc5246#section-7.4 +// +// It calls UnmarshalClientHello internally, and is kept for backwards compatibility +func (f *Fingerprinter) FingerprintClientHello(data []byte) (clientHelloSpec *ClientHelloSpec, err error) { + return f.RawClientHello(data) +} + +// RawClientHello returns a ClientHelloSpec which is based on the +// ClientHello raw bytes that is passed in as the raw argument. +// +// It was renamed from FingerprintClientHello in v1.3.1 and earlier versions +// as a more precise name for the function +func (f *Fingerprinter) RawClientHello(raw []byte) (clientHelloSpec *ClientHelloSpec, err error) { + clientHelloSpec = &ClientHelloSpec{} + + err = clientHelloSpec.FromRaw(raw, f.AllowBluntMimicry, f.RealPSKResumption) + if err != nil { + return nil, err + } + + if f.AlwaysAddPadding { + clientHelloSpec.AlwaysAddPadding() + } + + return clientHelloSpec, nil +} + +// UnmarshalJSONClientHello returns a ClientHelloSpec which is based on the +// ClientHello JSON bytes that is passed in as the json argument. +func (f *Fingerprinter) UnmarshalJSONClientHello(json []byte) (clientHelloSpec *ClientHelloSpec, err error) { + clientHelloSpec = &ClientHelloSpec{} + err = clientHelloSpec.UnmarshalJSON(json) + if err != nil { + return nil, err + } + + if f.AlwaysAddPadding { + clientHelloSpec.AlwaysAddPadding() + } + + return clientHelloSpec, nil +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_handshake_client.go b/backend/vendor/github.com/refraction-networking/utls/u_handshake_client.go new file mode 100644 index 0000000..0e2decc --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_handshake_client.go @@ -0,0 +1,612 @@ +// Copyright 2022 uTLS Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "bytes" + "compress/zlib" + "context" + "errors" + "fmt" + "io" + + "github.com/andybalholm/brotli" + "github.com/klauspost/compress/zstd" + "github.com/refraction-networking/utls/internal/fips140tls" + "github.com/refraction-networking/utls/internal/hpke" + "github.com/refraction-networking/utls/internal/tls13" +) + +// This function is called by (*clientHandshakeStateTLS13).readServerCertificate() +// to retrieve the certificate out of a message read by (*Conn).readHandshake() +func (hs *clientHandshakeStateTLS13) utlsReadServerCertificate(msg any) (processedMsg any, err error) { + for _, ext := range hs.uconn.Extensions { + switch ext.(type) { + case *UtlsCompressCertExtension: + // Included Compressed Certificate extension + if len(hs.uconn.certCompressionAlgs) > 0 { + compressedCertMsg, ok := msg.(*utlsCompressedCertificateMsg) + if ok { + if err = transcriptMsg(compressedCertMsg, hs.transcript); err != nil { + return nil, err + } + msg, err = hs.decompressCert(*compressedCertMsg) + if err != nil { + return nil, fmt.Errorf("tls: failed to decompress certificate message: %w", err) + } else { + return msg, nil + } + } + } + default: + continue + } + } + return nil, nil +} + +// called by (*clientHandshakeStateTLS13).utlsReadServerCertificate() when UtlsCompressCertExtension is used +func (hs *clientHandshakeStateTLS13) decompressCert(m utlsCompressedCertificateMsg) (*certificateMsgTLS13, error) { + var ( + decompressed io.Reader + compressed = bytes.NewReader(m.compressedCertificateMessage) + c = hs.c + ) + + // Check to see if the peer responded with an algorithm we advertised. + supportedAlg := false + for _, alg := range hs.uconn.certCompressionAlgs { + if m.algorithm == uint16(alg) { + supportedAlg = true + } + } + if !supportedAlg { + c.sendAlert(alertBadCertificate) + return nil, fmt.Errorf("unadvertised algorithm (%d)", m.algorithm) + } + + switch CertCompressionAlgo(m.algorithm) { + case CertCompressionBrotli: + decompressed = brotli.NewReader(compressed) + + case CertCompressionZlib: + rc, err := zlib.NewReader(compressed) + if err != nil { + c.sendAlert(alertBadCertificate) + return nil, fmt.Errorf("failed to open zlib reader: %w", err) + } + defer rc.Close() + decompressed = rc + + case CertCompressionZstd: + rc, err := zstd.NewReader(compressed) + if err != nil { + c.sendAlert(alertBadCertificate) + return nil, fmt.Errorf("failed to open zstd reader: %w", err) + } + defer rc.Close() + decompressed = rc + + default: + c.sendAlert(alertBadCertificate) + return nil, fmt.Errorf("unsupported algorithm (%d)", m.algorithm) + } + + rawMsg := make([]byte, m.uncompressedLength+4) // +4 for message type and uint24 length field + rawMsg[0] = typeCertificate + rawMsg[1] = uint8(m.uncompressedLength >> 16) + rawMsg[2] = uint8(m.uncompressedLength >> 8) + rawMsg[3] = uint8(m.uncompressedLength) + + n, err := decompressed.Read(rawMsg[4:]) + if err != nil && !errors.Is(err, io.EOF) { + c.sendAlert(alertBadCertificate) + return nil, err + } + if n < len(rawMsg)-4 { + // If, after decompression, the specified length does not match the actual length, the party + // receiving the invalid message MUST abort the connection with the "bad_certificate" alert. + // https://datatracker.ietf.org/doc/html/rfc8879#section-4 + c.sendAlert(alertBadCertificate) + return nil, fmt.Errorf("decompressed len (%d) does not match specified len (%d)", n, m.uncompressedLength) + } + certMsg := new(certificateMsgTLS13) + if !certMsg.unmarshal(rawMsg) { + return nil, c.sendAlert(alertUnexpectedMessage) + } + return certMsg, nil +} + +// to be called in (*clientHandshakeStateTLS13).handshake(), +// after hs.readServerFinished() and before hs.sendClientCertificate() +func (hs *clientHandshakeStateTLS13) serverFinishedReceived() error { + if err := hs.sendClientEncryptedExtensions(); err != nil { + return err + } + return nil +} + +func (hs *clientHandshakeStateTLS13) sendClientEncryptedExtensions() error { + c := hs.c + clientEncryptedExtensions := new(utlsClientEncryptedExtensionsMsg) + if c.utls.hasApplicationSettings { + clientEncryptedExtensions.hasApplicationSettings = true + clientEncryptedExtensions.applicationSettings = c.utls.localApplicationSettings + if _, err := c.writeHandshakeRecord(clientEncryptedExtensions, hs.transcript); err != nil { + return err + } + } + + return nil +} + +func (hs *clientHandshakeStateTLS13) utlsReadServerParameters(encryptedExtensions *encryptedExtensionsMsg) error { + hs.c.utls.hasApplicationSettings = encryptedExtensions.utls.hasApplicationSettings + hs.c.utls.peerApplicationSettings = encryptedExtensions.utls.applicationSettings + hs.c.utls.echRetryConfigs = encryptedExtensions.utls.echRetryConfigs + + if hs.c.utls.hasApplicationSettings { + if hs.uconn.vers < VersionTLS13 { + return errors.New("tls: server sent application settings at invalid version") + } + if len(hs.uconn.clientProtocol) == 0 { + return errors.New("tls: server sent application settings without ALPN") + } + + // Check if the ALPN selected by the server exists in the client's list. + if alps, ok := hs.uconn.config.ApplicationSettings[hs.serverHello.alpnProtocol]; ok { + hs.c.utls.localApplicationSettings = alps + } else { + // return errors.New("tls: server selected ALPN doesn't match a client ALPS") + return nil // ignore if client doesn't have ALPS in use. + // TODO: is this a issue or not? + } + } + + if len(hs.c.utls.echRetryConfigs) > 0 { + if hs.uconn.vers < VersionTLS13 { + return errors.New("tls: server sent ECH retry configs at invalid version") + } + + // find ECH extension in ClientHello + var echIncluded bool + for _, ext := range hs.uconn.Extensions { + if _, ok := ext.(ECHExtension); ok { + echIncluded = true + } + } + if !echIncluded { + return errors.New("tls: server sent ECH retry configs without client sending ECH extension") + } + } + + return nil +} + +func (c *Conn) makeClientHelloForApplyPreset() (*clientHelloMsg, *keySharePrivateKeys, *echClientContext, error) { + config := c.config + + // [UTLS SECTION START] + if len(config.ServerName) == 0 && !config.InsecureSkipVerify && len(config.InsecureServerNameToVerify) == 0 { + return nil, nil, nil, errors.New("tls: at least one of ServerName, InsecureSkipVerify or InsecureServerNameToVerify must be specified in the tls.Config") + } + // [UTLS SECTION END] + + nextProtosLength := 0 + for _, proto := range config.NextProtos { + if l := len(proto); l == 0 || l > 255 { + return nil, nil, nil, errors.New("tls: invalid NextProtos value") + } else { + nextProtosLength += 1 + l + } + } + if nextProtosLength > 0xffff { + return nil, nil, nil, errors.New("tls: NextProtos values too large") + } + + supportedVersions := config.supportedVersions(roleClient) + if len(supportedVersions) == 0 { + return nil, nil, nil, errors.New("tls: no supported versions satisfy MinVersion and MaxVersion") + } + maxVersion := config.maxSupportedVersion(roleClient) + + hello := &clientHelloMsg{ + vers: maxVersion, + compressionMethods: []uint8{compressionNone}, + random: make([]byte, 32), + extendedMasterSecret: true, + ocspStapling: true, + scts: true, + serverName: hostnameInSNI(config.ServerName), + supportedCurves: config.curvePreferences(maxVersion), + supportedPoints: []uint8{pointFormatUncompressed}, + secureRenegotiationSupported: true, + alpnProtocols: config.NextProtos, + supportedVersions: supportedVersions, + } + + // The version at the beginning of the ClientHello was capped at TLS 1.2 + // for compatibility reasons. The supported_versions extension is used + // to negotiate versions now. See RFC 8446, Section 4.2.1. + if hello.vers > VersionTLS12 { + hello.vers = VersionTLS12 + } + + if c.handshakes > 0 { + hello.secureRenegotiation = c.clientFinished[:] + } + + preferenceOrder := cipherSuitesPreferenceOrder + if !hasAESGCMHardwareSupport { + preferenceOrder = cipherSuitesPreferenceOrderNoAES + } + configCipherSuites := config.cipherSuites() + hello.cipherSuites = make([]uint16, 0, len(configCipherSuites)) + + for _, suiteId := range preferenceOrder { + suite := mutualCipherSuite(configCipherSuites, suiteId) + if suite == nil { + continue + } + // Don't advertise TLS 1.2-only cipher suites unless + // we're attempting TLS 1.2. + if maxVersion < VersionTLS12 && suite.flags&suiteTLS12 != 0 { + continue + } + hello.cipherSuites = append(hello.cipherSuites, suiteId) + } + + _, err := io.ReadFull(config.rand(), hello.random) + if err != nil { + return nil, nil, nil, errors.New("tls: short read from Rand: " + err.Error()) + } + + // A random session ID is used to detect when the server accepted a ticket + // and is resuming a session (see RFC 5077). In TLS 1.3, it's always set as + // a compatibility measure (see RFC 8446, Section 4.1.2). + // + // The session ID is not set for QUIC connections (see RFC 9001, Section 8.4). + if c.quic == nil { + hello.sessionId = make([]byte, 32) + if _, err := io.ReadFull(config.rand(), hello.sessionId); err != nil { + return nil, nil, nil, errors.New("tls: short read from Rand: " + err.Error()) + } + } + + if maxVersion >= VersionTLS12 { + hello.supportedSignatureAlgorithms = supportedSignatureAlgorithms() + } + if testingOnlyForceClientHelloSignatureAlgorithms != nil { + hello.supportedSignatureAlgorithms = testingOnlyForceClientHelloSignatureAlgorithms + } + + var keyShareKeys *keySharePrivateKeys + if hello.supportedVersions[0] == VersionTLS13 { + // Reset the list of ciphers when the client only supports TLS 1.3. + if len(hello.supportedVersions) == 1 { + hello.cipherSuites = nil + } + if fips140tls.Required() { + hello.cipherSuites = append(hello.cipherSuites, defaultCipherSuitesTLS13FIPS...) + } else if hasAESGCMHardwareSupport { + hello.cipherSuites = append(hello.cipherSuites, defaultCipherSuitesTLS13...) + } else { + hello.cipherSuites = append(hello.cipherSuites, defaultCipherSuitesTLS13NoAES...) + } + + if len(hello.supportedCurves) == 0 { + return nil, nil, nil, errors.New("tls: no supported elliptic curves for ECDHE") + } + // curveID := hello.supportedCurves[0] + // keyShareKeys = &keySharePrivateKeys{curveID: curveID} + // // Note that if X25519MLKEM768 is supported, it will be first because + // // the preference order is fixed. + // if curveID == X25519MLKEM768 { + // keyShareKeys.ecdhe, err = generateECDHEKey(config.rand(), X25519) + // if err != nil { + // return nil, nil, nil, err + // } + // seed := make([]byte, mlkem.SeedSize) + // if _, err := io.ReadFull(config.rand(), seed); err != nil { + // return nil, nil, nil, err + // } + // keyShareKeys.mlkem, err = mlkem.NewDecapsulationKey768(seed) + // if err != nil { + // return nil, nil, nil, err + // } + // mlkemEncapsulationKey := keyShareKeys.mlkem.EncapsulationKey().Bytes() + // x25519EphemeralKey := keyShareKeys.ecdhe.PublicKey().Bytes() + // hello.keyShares = []keyShare{ + // {group: X25519MLKEM768, data: append(mlkemEncapsulationKey, x25519EphemeralKey...)}, + // } + // // If both X25519MLKEM768 and X25519 are supported, we send both key + // // shares (as a fallback) and we reuse the same X25519 ephemeral + // // key, as allowed by draft-ietf-tls-hybrid-design-09, Section 3.2. + // if slices.Contains(hello.supportedCurves, X25519) { + // hello.keyShares = append(hello.keyShares, keyShare{group: X25519, data: x25519EphemeralKey}) + // } + // } else { + // if _, ok := curveForCurveID(curveID); !ok { + // return nil, nil, nil, errors.New("tls: CurvePreferences includes unsupported curve") + // } + // keyShareKeys.ecdhe, err = generateECDHEKey(config.rand(), curveID) + // if err != nil { + // return nil, nil, nil, err + // } + // hello.keyShares = []keyShare{{group: curveID, data: keyShareKeys.ecdhe.PublicKey().Bytes()}} + // } + } + + // [UTLS] We don't need this, since it is not ready yet + // if c.quic != nil { + // p, err := c.quicGetTransportParameters() + // if err != nil { + // return nil, nil, nil, err + // } + // if p == nil { + // p = []byte{} + // } + // hello.quicTransportParameters = p + // } + + var ech *echClientContext + if c.config.EncryptedClientHelloConfigList != nil { + if c.config.MinVersion != 0 && c.config.MinVersion < VersionTLS13 { + return nil, nil, nil, errors.New("tls: MinVersion must be >= VersionTLS13 if EncryptedClientHelloConfigList is populated") + } + if c.config.MaxVersion != 0 && c.config.MaxVersion <= VersionTLS12 { + return nil, nil, nil, errors.New("tls: MaxVersion must be >= VersionTLS13 if EncryptedClientHelloConfigList is populated") + } + echConfigs, err := parseECHConfigList(c.config.EncryptedClientHelloConfigList) + if err != nil { + return nil, nil, nil, err + } + echConfig := pickECHConfig(echConfigs) + if echConfig == nil { + return nil, nil, nil, errors.New("tls: EncryptedClientHelloConfigList contains no valid configs") + } + ech = &echClientContext{config: echConfig} + hello.encryptedClientHello = []byte{1} // indicate inner hello + // We need to explicitly set these 1.2 fields to nil, as we do not + // marshal them when encoding the inner hello, otherwise transcripts + // will later mismatch. + hello.supportedPoints = nil + hello.ticketSupported = false + hello.secureRenegotiationSupported = false + hello.extendedMasterSecret = false + + echPK, err := hpke.ParseHPKEPublicKey(ech.config.KemID, ech.config.PublicKey) + if err != nil { + return nil, nil, nil, err + } + suite, err := pickECHCipherSuite(ech.config.SymmetricCipherSuite) + if err != nil { + return nil, nil, nil, err + } + ech.kdfID, ech.aeadID = suite.KDFID, suite.AEADID + info := append([]byte("tls ech\x00"), ech.config.raw...) + ech.encapsulatedKey, ech.hpkeContext, err = hpke.SetupSender(ech.config.KemID, suite.KDFID, suite.AEADID, echPK, info) + if err != nil { + return nil, nil, nil, err + } + } + + return hello, keyShareKeys, ech, nil +} + +// clientHandshakeWithOneState checks that exactly one expected state is set (1.2 or 1.3) +// and performs client TLS handshake with that state +func (c *UConn) clientHandshake(ctx context.Context) (err error) { + // [uTLS section begins] + hello := c.HandshakeState.Hello.getPrivatePtr() + ech := c.echCtx + defer func() { c.HandshakeState.Hello = hello.getPublicPtr() }() + + sessionIsLocked := c.utls.sessionController.isSessionLocked() + + // after this point exactly 1 out of 2 HandshakeState pointers is non-nil, + // useTLS13 variable tells which pointer + // [uTLS section ends] + + if c.config == nil { + c.config = defaultConfig() + } + + // This may be a renegotiation handshake, in which case some fields + // need to be reset. + c.didResume = false + + // [uTLS section begins] + // don't make new ClientHello, use hs.hello + // preserve the checks from beginning and end of makeClientHello() + if len(c.config.ServerName) == 0 && !c.config.InsecureSkipVerify && len(c.config.InsecureServerNameToVerify) == 0 { + return errors.New("tls: at least one of ServerName, InsecureSkipVerify or InsecureServerNameToVerify must be specified in the tls.Config") + } + + nextProtosLength := 0 + for _, proto := range c.config.NextProtos { + if l := len(proto); l == 0 || l > 255 { + return errors.New("tls: invalid NextProtos value") + } else { + nextProtosLength += 1 + l + } + } + + if nextProtosLength > 0xffff { + return errors.New("tls: NextProtos values too large") + } + + if c.handshakes > 0 { + hello.secureRenegotiation = c.clientFinished[:] + } + + var ( + session *SessionState + earlySecret *tls13.EarlySecret + binderKey []byte + ) + if !sessionIsLocked { + // [uTLS section ends] + + session, earlySecret, binderKey, err = c.loadSession(hello) + + // [uTLS section start] + } else { + session = c.HandshakeState.Session + + if c.HandshakeState.State13.EarlySecret != nil && session != nil { + cipherSuite := cipherSuiteTLS13ByID(session.cipherSuite) + earlySecret = tls13.NewEarlySecretFromSecret(cipherSuite.hash.New, c.HandshakeState.State13.EarlySecret) + } + + binderKey = c.HandshakeState.State13.BinderKey + } + // [uTLS section ends] + if err != nil { + return err + } + if session != nil { + defer func() { + // If we got a handshake failure when resuming a session, throw away + // the session ticket. See RFC 5077, Section 3.2. + // + // RFC 8446 makes no mention of dropping tickets on failure, but it + // does require servers to abort on invalid binders, so we need to + // delete tickets to recover from a corrupted PSK. + if err != nil { + if cacheKey := c.clientSessionCacheKey(); cacheKey != "" { + c.config.ClientSessionCache.Put(cacheKey, nil) + } + } + }() + } + + if ech != nil && c.clientHelloBuildStatus != BuildByUtls { + // Split hello into inner and outer + ech.innerHello = hello.clone() + + // Overwrite the server name in the outer hello with the public facing + // name. + hello.serverName = string(ech.config.PublicName) + // Generate a new random for the outer hello. + hello.random = make([]byte, 32) + _, err = io.ReadFull(c.config.rand(), hello.random) + if err != nil { + return errors.New("tls: short read from Rand: " + err.Error()) + } + + // NOTE: we don't do PSK GREASE, in line with boringssl, it's meant to + // work around _possibly_ broken middleboxes, but there is little-to-no + // evidence that this is actually a problem. + + if err := computeAndUpdateOuterECHExtension(hello, ech.innerHello, ech, true); err != nil { + return err + } + } + + c.serverName = hello.serverName + + if _, err := c.writeHandshakeRecord(hello, nil); err != nil { + return err + } + + if hello.earlyData { + suite := cipherSuiteTLS13ByID(session.cipherSuite) + transcript := suite.hash.New() + if err := transcriptMsg(hello, transcript); err != nil { + return err + } + earlyTrafficSecret := earlySecret.ClientEarlyTrafficSecret(transcript) + c.quicSetWriteSecret(QUICEncryptionLevelEarly, suite.id, earlyTrafficSecret) + } + + // serverHelloMsg is not included in the transcript + msg, err := c.readHandshake(nil) + if err != nil { + return err + } + + serverHello, ok := msg.(*serverHelloMsg) + if !ok { + c.sendAlert(alertUnexpectedMessage) + return unexpectedMessageError(serverHello, msg) + } + + if err := c.pickTLSVersion(serverHello); err != nil { + return err + } + + // If we are negotiating a protocol version that's lower than what we + // support, check for the server downgrade canaries. + // See RFC 8446, Section 4.1.3. + maxVers := c.config.maxSupportedVersion(roleClient) + tls12Downgrade := string(serverHello.random[24:]) == downgradeCanaryTLS12 + tls11Downgrade := string(serverHello.random[24:]) == downgradeCanaryTLS11 + if maxVers == VersionTLS13 && c.vers <= VersionTLS12 && (tls12Downgrade || tls11Downgrade) || + maxVers == VersionTLS12 && c.vers <= VersionTLS11 && tls11Downgrade { + c.sendAlert(alertIllegalParameter) + return errors.New("tls: downgrade attempt detected, possibly due to a MitM attack or a broken middlebox") + } + + // uTLS: do not create new handshakeState, use existing one + if c.vers == VersionTLS13 { + hs13 := c.HandshakeState.toPrivate13() + hs13.serverHello = serverHello + hs13.hello = hello + hs13.echContext = ech + if c.HandshakeState.State13.EarlySecret != nil && session.cipherSuite != 0 { + hs13.earlySecret = tls13.NewEarlySecretFromSecret(cipherSuiteTLS13ByID(session.cipherSuite).hash.New, c.HandshakeState.State13.EarlySecret) + } + if c.HandshakeState.MasterSecret != nil && session.cipherSuite != 0 { + hs13.masterSecret = tls13.NewMasterSecretFromSecret(cipherSuiteTLS13ByID(session.cipherSuite).hash.New, c.HandshakeState.MasterSecret) + } + if !sessionIsLocked { + hs13.earlySecret = earlySecret + hs13.binderKey = binderKey + hs13.session = session + } + hs13.ctx = ctx + // In TLS 1.3, session tickets are delivered after the handshake. + err = hs13.handshake() + if handshakeState := hs13.toPublic13(); handshakeState != nil { + c.HandshakeState = *handshakeState + } + return err + } + + hs12 := c.HandshakeState.toPrivate12() + hs12.serverHello = serverHello + hs12.hello = hello + hs12.ctx = ctx + hs12.session = session + err = hs12.handshake() + if handshakeState := hs12.toPublic12(); handshakeState != nil { + c.HandshakeState = *handshakeState + } + if err != nil { + return err + } + return nil +} + +func (c *UConn) echTranscriptMsg(outer *clientHelloMsg, echCtx *echClientContext) (err error) { + // Recreate the inner ClientHello from its compressed form using server's decodeInnerClientHello function. + // See https://github.com/refraction-networking/utls/blob/e430876b1d82fdf582efc57f3992d448e7ab3d8a/ech.go#L276-L283 + encodedInner, err := encodeInnerClientHelloReorderOuterExts(echCtx.innerHello, int(echCtx.config.MaxNameLength), c.extensionsList()) + if err != nil { + return err + } + + decodedInner, err := decodeInnerClientHello(outer, encodedInner) + if err != nil { + return err + } + + if err := transcriptMsg(decodedInner, echCtx.innerTranscript); err != nil { + return err + } + + return nil +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_handshake_messages.go b/backend/vendor/github.com/refraction-networking/utls/u_handshake_messages.go new file mode 100644 index 0000000..1c9f460 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_handshake_messages.go @@ -0,0 +1,141 @@ +// Copyright 2022 uTLS Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "golang.org/x/crypto/cryptobyte" +) + +// Only implemented client-side, for server certificates. +// Alternate certificate message formats (https://datatracker.ietf.org/doc/html/rfc7250) are not +// supported. +// https://datatracker.ietf.org/doc/html/rfc8879 +type utlsCompressedCertificateMsg struct { + raw []byte + + algorithm uint16 + uncompressedLength uint32 // uint24 + compressedCertificateMessage []byte +} + +func (m *utlsCompressedCertificateMsg) marshal() ([]byte, error) { + if m.raw != nil { + return m.raw, nil + } + + var b cryptobyte.Builder + b.AddUint8(utlsTypeCompressedCertificate) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddUint16(m.algorithm) + b.AddUint24(m.uncompressedLength) + b.AddUint24LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(m.compressedCertificateMessage) + }) + }) + + var err error + m.raw, err = b.Bytes() + return m.raw, err +} + +func (m *utlsCompressedCertificateMsg) unmarshal(data []byte) bool { + *m = utlsCompressedCertificateMsg{raw: data} + s := cryptobyte.String(data) + + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint16(&m.algorithm) || + !s.ReadUint24(&m.uncompressedLength) || + !readUint24LengthPrefixed(&s, &m.compressedCertificateMessage) { + return false + } + return true +} + +type utlsEncryptedExtensionsMsgExtraFields struct { + hasApplicationSettings bool + applicationSettings []byte + echRetryConfigs []ECHConfig + customExtension []byte +} + +func (m *encryptedExtensionsMsg) utlsUnmarshal(extension uint16, extData cryptobyte.String) bool { + switch extension { + case utlsExtensionApplicationSettings: + m.utls.hasApplicationSettings = true + m.utls.applicationSettings = []byte(extData) + case utlsExtensionECH: + var err error + m.utls.echRetryConfigs, err = UnmarshalECHConfigs([]byte(extData)) + if err != nil { + return false + } + } + return true // success/unknown extension +} + +type utlsClientEncryptedExtensionsMsg struct { + raw []byte + applicationSettings []byte + hasApplicationSettings bool + customExtension []byte +} + +func (m *utlsClientEncryptedExtensionsMsg) marshal() (x []byte, err error) { + if m.raw != nil { + return m.raw, nil + } + + var builder cryptobyte.Builder + builder.AddUint8(typeEncryptedExtensions) + builder.AddUint24LengthPrefixed(func(body *cryptobyte.Builder) { + body.AddUint16LengthPrefixed(func(extensions *cryptobyte.Builder) { + if m.hasApplicationSettings { + extensions.AddUint16(utlsExtensionApplicationSettings) + extensions.AddUint16LengthPrefixed(func(msg *cryptobyte.Builder) { + msg.AddBytes(m.applicationSettings) + }) + } + if len(m.customExtension) > 0 { + extensions.AddUint16(utlsFakeExtensionCustom) + extensions.AddUint16LengthPrefixed(func(msg *cryptobyte.Builder) { + msg.AddBytes(m.customExtension) + }) + } + }) + }) + + m.raw, err = builder.Bytes() + return m.raw, err +} + +func (m *utlsClientEncryptedExtensionsMsg) unmarshal(data []byte) bool { + *m = utlsClientEncryptedExtensionsMsg{raw: data} + s := cryptobyte.String(data) + + var extensions cryptobyte.String + if !s.Skip(4) || // message type and uint24 length field + !s.ReadUint16LengthPrefixed(&extensions) || !s.Empty() { + return false + } + + for !extensions.Empty() { + var extension uint16 + var extData cryptobyte.String + if !extensions.ReadUint16(&extension) || + !extensions.ReadUint16LengthPrefixed(&extData) { + return false + } + + switch extension { + case utlsExtensionApplicationSettings: + m.hasApplicationSettings = true + m.applicationSettings = []byte(extData) + default: + // Unknown extensions are illegal in EncryptedExtensions. + return false + } + } + return true +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_hpke.go b/backend/vendor/github.com/refraction-networking/utls/u_hpke.go new file mode 100644 index 0000000..08d5eb4 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_hpke.go @@ -0,0 +1,62 @@ +package tls + +import ( + "errors" + "fmt" + + "github.com/cloudflare/circl/hpke" + "github.com/cloudflare/circl/kem" +) + +type HPKERawPublicKey = []byte +type HPKE_KEM_ID = uint16 // RFC 9180 +type HPKE_KDF_ID = uint16 // RFC 9180 +type HPKE_AEAD_ID = uint16 // RFC 9180 + +type HPKESymmetricCipherSuite struct { + KdfId HPKE_KDF_ID + AeadId HPKE_AEAD_ID +} + +type HPKEKeyConfig struct { + ConfigId uint8 + KemId HPKE_KEM_ID + PublicKey kem.PublicKey + rawPublicKey HPKERawPublicKey + CipherSuites []HPKESymmetricCipherSuite +} + +var defaultHPKESuite hpke.Suite + +func init() { + var err error + defaultHPKESuite, err = hpkeAssembleSuite( + uint16(hpke.KEM_X25519_HKDF_SHA256), + uint16(hpke.KDF_HKDF_SHA256), + uint16(hpke.AEAD_AES128GCM), + ) + if err != nil { + panic(fmt.Sprintf("hpke: mandatory-to-implement cipher suite not supported: %s", err)) + } +} + +func hpkeAssembleSuite(kemId, kdfId, aeadId uint16) (hpke.Suite, error) { + kem := hpke.KEM(kemId) + if !kem.IsValid() { + return hpke.Suite{}, errors.New("KEM is not supported") + } + kdf := hpke.KDF(kdfId) + if !kdf.IsValid() { + return hpke.Suite{}, errors.New("KDF is not supported") + } + aead := hpke.AEAD(aeadId) + if !aead.IsValid() { + return hpke.Suite{}, errors.New("AEAD is not supported") + } + return hpke.NewSuite(kem, kdf, aead), nil +} + +var dummyX25519PublicKey = []byte{ + 143, 38, 37, 36, 12, 6, 229, 30, 140, 27, 167, 73, 26, 100, 203, 107, 216, + 81, 163, 222, 52, 211, 54, 210, 46, 37, 78, 216, 157, 97, 241, 244, +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_key_schedule.go b/backend/vendor/github.com/refraction-networking/utls/u_key_schedule.go new file mode 100644 index 0000000..f52839d --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_key_schedule.go @@ -0,0 +1,30 @@ +package tls + +import ( + "crypto/mlkem" + + "golang.org/x/crypto/sha3" +) + +// kyberDecapsulate implements decapsulation according to Kyber Round 3. +func kyberDecapsulate(dk *mlkem.DecapsulationKey768, c []byte) ([]byte, error) { + K, err := dk.Decapsulate(c) + if err != nil { + return nil, err + } + return kyberSharedSecret(c, K), nil +} + +func kyberSharedSecret(c, K []byte) []byte { + // Package mlkem implements ML-KEM, which compared to Kyber removed a + // final hashing step. Compute SHAKE-256(K || SHA3-256(c), 32) to match Kyber. + // See https://words.filippo.io/mlkem768/#bonus-track-using-a-ml-kem-implementation-as-kyber-v3. + h := sha3.NewShake256() + h.Write(K) + ch := sha3.New256() + ch.Write(c) + h.Write(ch.Sum(nil)) + out := make([]byte, 32) + h.Read(out) + return out +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_parrots.go b/backend/vendor/github.com/refraction-networking/utls/u_parrots.go new file mode 100644 index 0000000..a155539 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_parrots.go @@ -0,0 +1,3165 @@ +// Copyright 2017 Google Inc. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto/mlkem" + crand "crypto/rand" + "crypto/sha256" + "encoding/binary" + "errors" + "fmt" + "io" + "math" + "math/big" + "math/rand" + "sort" + "strconv" + + "github.com/refraction-networking/utls/dicttls" +) + +var ErrUnknownClientHelloID = errors.New("tls: unknown ClientHelloID") + +// UTLSIdToSpec converts a ClientHelloID to a corresponding ClientHelloSpec. +// +// Exported internal function utlsIdToSpec per request. +func UTLSIdToSpec(id ClientHelloID) (ClientHelloSpec, error) { + return utlsIdToSpec(id) +} + +func utlsIdToSpec(id ClientHelloID) (ClientHelloSpec, error) { + switch id { + case HelloChrome_58, HelloChrome_62: + return ClientHelloSpec{ + TLSVersMax: VersionTLS12, + TLSVersMin: VersionTLS10, + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{compressionNone}, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &SessionTicketExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1}, + }, + &StatusRequestExtension{}, + &SCTExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &FakeChannelIDExtension{}, + &SupportedPointsExtension{SupportedPoints: []byte{pointFormatUncompressed}}, + &SupportedCurvesExtension{[]CurveID{CurveID(GREASE_PLACEHOLDER), + X25519, CurveP256, CurveP384}}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + GetSessionID: sha256.Sum256, + }, nil + case HelloChrome_70: + return ClientHelloSpec{ + TLSVersMin: VersionTLS10, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{ + compressionNone, + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &SessionTicketExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }}, + &StatusRequestExtension{}, + &SCTExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &FakeChannelIDExtension{}, + &SupportedPointsExtension{SupportedPoints: []byte{ + pointFormatUncompressed, + }}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{pskModeDHE}}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10}}, + &SupportedCurvesExtension{[]CurveID{ + CurveID(GREASE_PLACEHOLDER), + X25519, + CurveP256, + CurveP384, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{CertCompressionBrotli}}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloChrome_72: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + CurveID(GREASE_PLACEHOLDER), + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloChrome_83: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + CurveID(GREASE_PLACEHOLDER), + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloChrome_87: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + CurveID(GREASE_PLACEHOLDER), + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloChrome_96: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + CurveID(GREASE_PLACEHOLDER), + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloChrome_100, HelloChrome_102: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloChrome_106_Shuffle: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }), + }, nil + // Chrome w/ Post-Quantum Key Agreement + case HelloChrome_115_PQ: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519Kyber768Draft00, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519Kyber768Draft00}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }), + }, nil + // Chrome ECH + case HelloChrome_120: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{Curves: []CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{KeyShares: []KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{Modes: []uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{Versions: []uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{Algorithms: []CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + BoringGREASEECH(), + &UtlsGREASEExtension{}, + }), + }, nil + // Chrome w/ Post-Quantum Key Agreement and ECH + case HelloChrome_120_PQ: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519Kyber768Draft00, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519Kyber768Draft00}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + BoringGREASEECH(), + &UtlsGREASEExtension{}, + }), + }, nil + case HelloChrome_131: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519MLKEM768, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519MLKEM768}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + BoringGREASEECH(), + &UtlsGREASEExtension{}, + }), + }, nil + case HelloFirefox_55, HelloFirefox_56: + return ClientHelloSpec{ + TLSVersMax: VersionTLS12, + TLSVersMin: VersionTLS10, + CipherSuites: []uint16{ + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + FAKE_TLS_DHE_RSA_WITH_AES_128_CBC_SHA, + FAKE_TLS_DHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{compressionNone}, + Extensions: []TLSExtension{ + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{X25519, CurveP256, CurveP384, CurveP521}}, + &SupportedPointsExtension{SupportedPoints: []byte{pointFormatUncompressed}}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + PSSWithSHA256, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA512, + ECDSAWithSHA1, + PKCS1WithSHA1}, + }, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + GetSessionID: nil, + }, nil + case HelloFirefox_63, HelloFirefox_65: + return ClientHelloSpec{ + TLSVersMin: VersionTLS10, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_CHACHA20_POLY1305_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + FAKE_TLS_DHE_RSA_WITH_AES_128_CBC_SHA, + FAKE_TLS_DHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{ + compressionNone, + }, + Extensions: []TLSExtension{ + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + X25519, + CurveP256, + CurveP384, + CurveP521, + CurveID(FakeFFDHE2048), + CurveID(FakeFFDHE3072), + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + pointFormatUncompressed, + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: X25519}, + {Group: CurveP256}, + }}, + &SupportedVersionsExtension{[]uint16{ + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10}}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + PSSWithSHA256, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA512, + ECDSAWithSHA1, + PKCS1WithSHA1, + }}, + &PSKKeyExchangeModesExtension{[]uint8{pskModeDHE}}, + &FakeRecordSizeLimitExtension{0x4001}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }}, nil + case HelloFirefox_99: + return ClientHelloSpec{ + TLSVersMin: VersionTLS10, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_CHACHA20_POLY1305_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{ + compressionNone, + }, + Extensions: []TLSExtension{ + &SNIExtension{}, //server_name + &ExtendedMasterSecretExtension{}, //extended_master_secret + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, //extensionRenegotiationInfo + &SupportedCurvesExtension{[]CurveID{ //supported_groups + X25519, + CurveP256, + CurveP384, + CurveP521, + CurveID(FakeFFDHE2048), + CurveID(FakeFFDHE3072), + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ //ec_point_formats + pointFormatUncompressed, + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, //application_layer_protocol_negotiation + &StatusRequestExtension{}, + &FakeDelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ //signature_algorithms + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + ECDSAWithSHA1, + }, + }, + &KeyShareExtension{[]KeyShare{ + {Group: X25519}, + {Group: CurveP256}, //key_share + }}, + &SupportedVersionsExtension{[]uint16{ + VersionTLS13, //supported_versions + VersionTLS12, + VersionTLS11, + VersionTLS10, + }}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ //signature_algorithms + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + PSSWithSHA256, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA512, + ECDSAWithSHA1, + PKCS1WithSHA1, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ //psk_key_exchange_modes + PskModeDHE, + }}, + &FakeRecordSizeLimitExtension{Limit: 0x4001}, //record_size_limit + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, //padding + }}, nil + case HelloFirefox_102: + return ClientHelloSpec{ + TLSVersMin: VersionTLS10, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_CHACHA20_POLY1305_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + compressionNone, + }, + Extensions: []TLSExtension{ + &SNIExtension{}, //server_name + &ExtendedMasterSecretExtension{}, //extended_master_secret + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, //extensionRenegotiationInfo + &SupportedCurvesExtension{[]CurveID{ //supported_groups + X25519, + CurveP256, + CurveP384, + CurveP521, + CurveID(FakeFFDHE2048), + CurveID(FakeFFDHE3072), + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ //ec_point_formats + pointFormatUncompressed, + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2"}}, //application_layer_protocol_negotiation + &StatusRequestExtension{}, + &FakeDelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ //signature_algorithms + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + ECDSAWithSHA1, + }, + }, + &KeyShareExtension{[]KeyShare{ + {Group: X25519}, + {Group: CurveP256}, //key_share + }}, + &SupportedVersionsExtension{[]uint16{ + VersionTLS13, //supported_versions + VersionTLS12, + }}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ //signature_algorithms + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + PSSWithSHA256, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA512, + ECDSAWithSHA1, + PKCS1WithSHA1, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ //psk_key_exchange_modes + PskModeDHE, + }}, + &FakeRecordSizeLimitExtension{Limit: 0x4001}, //record_size_limit + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, //padding + }}, nil + case HelloFirefox_105: + return ClientHelloSpec{ + TLSVersMin: VersionTLS12, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_CHACHA20_POLY1305_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + X25519, + CurveP256, + CurveP384, + CurveP521, + 256, + 257, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // uncompressed + }, + }, + &SessionTicketExtension{}, + &ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &StatusRequestExtension{}, + &FakeDelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + ECDSAWithSHA1, + }, + }, + &KeyShareExtension{ + KeyShares: []KeyShare{ + { + Group: X25519, + }, + { + Group: CurveP256, + }, + }, + }, + &SupportedVersionsExtension{ + Versions: []uint16{ + VersionTLS13, + VersionTLS12, + }, + }, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + PSSWithSHA256, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA512, + ECDSAWithSHA1, + PKCS1WithSHA1, + }, + }, + &PSKKeyExchangeModesExtension{ + Modes: []uint8{ + PskModeDHE, + }, + }, + &FakeRecordSizeLimitExtension{ + Limit: 0x4001, + }, + &UtlsPaddingExtension{ + GetPaddingLen: BoringPaddingStyle, + }, + }, + }, nil + case HelloFirefox_120: + return ClientHelloSpec{ + TLSVersMin: VersionTLS12, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_CHACHA20_POLY1305_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + X25519, + CurveP256, + CurveP384, + CurveP521, + 256, + 257, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // uncompressed + }, + }, + &SessionTicketExtension{}, + &ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &StatusRequestExtension{}, + &FakeDelegatedCredentialsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + ECDSAWithSHA1, + }, + }, + &KeyShareExtension{ + KeyShares: []KeyShare{ + { + Group: X25519, + }, + { + Group: CurveP256, + }, + }, + }, + &SupportedVersionsExtension{ + Versions: []uint16{ + VersionTLS13, + VersionTLS12, + }, + }, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithP521AndSHA512, + PSSWithSHA256, + PSSWithSHA384, + PSSWithSHA512, + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA512, + ECDSAWithSHA1, + PKCS1WithSHA1, + }, + }, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &FakeRecordSizeLimitExtension{ + Limit: 0x4001, + }, + &GREASEEncryptedClientHelloExtension{ + CandidateCipherSuites: []HPKESymmetricCipherSuite{ + { + KdfId: dicttls.HKDF_SHA256, + AeadId: dicttls.AEAD_AES_128_GCM, + }, + { + KdfId: dicttls.HKDF_SHA256, + AeadId: dicttls.AEAD_CHACHA20_POLY1305, + }, + }, + CandidatePayloadLens: []uint16{223}, // +16: 239 + }, + }, + }, nil + case HelloIOS_11_1: + return ClientHelloSpec{ + TLSVersMax: VersionTLS12, + TLSVersMin: VersionTLS10, + CipherSuites: []uint16{ + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256, + TLS_RSA_WITH_AES_128_CBC_SHA256, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA, + }, + CompressionMethods: []byte{ + compressionNone, + }, + Extensions: []TLSExtension{ + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }}, + &StatusRequestExtension{}, + &NPNExtension{}, + &SCTExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "h2-16", "h2-15", "h2-14", "spdy/3.1", "spdy/3", "http/1.1"}}, + &SupportedPointsExtension{SupportedPoints: []byte{ + pointFormatUncompressed, + }}, + &SupportedCurvesExtension{Curves: []CurveID{ + X25519, + CurveP256, + CurveP384, + CurveP521, + }}, + }, + }, nil + case HelloIOS_12_1: + return ClientHelloSpec{ + CipherSuites: []uint16{ + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256, + TLS_RSA_WITH_AES_128_CBC_SHA256, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA, + 0xc008, + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{ + compressionNone, + }, + Extensions: []TLSExtension{ + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithSHA1, + PSSWithSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }}, + &StatusRequestExtension{}, + &NPNExtension{}, + &SCTExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "h2-16", "h2-15", "h2-14", "spdy/3.1", "spdy/3", "http/1.1"}}, + &SupportedPointsExtension{SupportedPoints: []byte{ + pointFormatUncompressed, + }}, + &SupportedCurvesExtension{[]CurveID{ + X25519, + CurveP256, + CurveP384, + CurveP521, + }}, + }, + }, nil + case HelloIOS_13: + return ClientHelloSpec{ + CipherSuites: []uint16{ + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256, + TLS_RSA_WITH_AES_128_CBC_SHA256, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA, + 0xc008, + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithSHA1, + PSSWithSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }}, + &StatusRequestExtension{}, + &SCTExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &KeyShareExtension{[]KeyShare{ + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }}, + &SupportedCurvesExtension{[]CurveID{ + X25519, + CurveP256, + CurveP384, + CurveP521, + }}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloIOS_14: + return ClientHelloSpec{ + // TLSVersMax: VersionTLS12, + // TLSVersMin: VersionTLS10, + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + DISABLED_TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + DISABLED_TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_GCM_SHA256, + DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256, + TLS_RSA_WITH_AES_128_CBC_SHA256, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA, + 0xc008, + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + CurveID(GREASE_PLACEHOLDER), + X25519, + CurveP256, + CurveP384, + CurveP521, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithSHA1, + PSSWithSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + }, + }, nil + case HelloAndroid_11_OkHttp: + return ClientHelloSpec{ + CipherSuites: []uint16{ + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + 0xcca9, // Cipher Suite: TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 (0xcca9) + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + 0xcca8, // Cipher Suite: TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (0xcca8) + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{}, + // supported_groups + &SupportedCurvesExtension{[]CurveID{ + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }}, + }, + }, nil + case HelloEdge_85: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // pointFormatUncompressed + }, + }, + &SessionTicketExtension{}, + &ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }, + }, + &SCTExtension{}, + &KeyShareExtension{ + KeyShares: []KeyShare{ + { + Group: GREASE_PLACEHOLDER, + Data: []byte{ + 0, + }, + }, + { + Group: X25519, + }, + }, + }, + &PSKKeyExchangeModesExtension{ + Modes: []uint8{ + PskModeDHE, + }, + }, + &SupportedVersionsExtension{ + Versions: []uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }, + }, + &UtlsCompressCertExtension{ + Algorithms: []CertCompressionAlgo{ + CertCompressionBrotli, + }, + }, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{ + GetPaddingLen: BoringPaddingStyle, + }, + }, + }, nil + case HelloEdge_106: + return ClientHelloSpec{ + TLSVersMin: VersionTLS12, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // uncompressed + }, + }, + &SessionTicketExtension{}, + &ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }, + }, + &SCTExtension{}, + &KeyShareExtension{ + KeyShares: []KeyShare{ + { + Group: GREASE_PLACEHOLDER, + Data: []byte{ + 0, + }, + }, + { + Group: X25519, + }, + }, + }, + &PSKKeyExchangeModesExtension{ + Modes: []uint8{ + PskModeDHE, + }, + }, + &SupportedVersionsExtension{ + Versions: []uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }, + }, + &UtlsCompressCertExtension{ + Algorithms: []CertCompressionAlgo{ + CertCompressionBrotli, + }, + }, + &ApplicationSettingsExtension{ + SupportedProtocols: []string{ + "h2", + }, + }, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{ + GetPaddingLen: BoringPaddingStyle, + }, + }, + }, nil + case HelloSafari_16_0: + return ClientHelloSpec{ + TLSVersMin: VersionTLS10, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA, + FAKE_TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, + TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + CurveP521, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // uncompressed + }, + }, + &ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithSHA1, + PSSWithSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }, + }, + &SCTExtension{}, + &KeyShareExtension{ + KeyShares: []KeyShare{ + { + Group: GREASE_PLACEHOLDER, + Data: []byte{ + 0, + }, + }, + { + Group: X25519, + }, + }, + }, + &PSKKeyExchangeModesExtension{ + Modes: []uint8{ + PskModeDHE, + }, + }, + &SupportedVersionsExtension{ + Versions: []uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }, + }, + &UtlsCompressCertExtension{ + Algorithms: []CertCompressionAlgo{ + CertCompressionZlib, + }, + }, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{ + GetPaddingLen: BoringPaddingStyle, + }, + }, + }, nil + case Hello360_7_5: + return ClientHelloSpec{ + CipherSuites: []uint16{ + TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + FAKE_TLS_DHE_RSA_WITH_AES_256_CBC_SHA, + FAKE_TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, + TLS_RSA_WITH_AES_256_CBC_SHA, + DISABLED_TLS_RSA_WITH_AES_256_CBC_SHA256, + TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, + TLS_ECDHE_RSA_WITH_RC4_128_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, + FAKE_TLS_DHE_RSA_WITH_AES_128_CBC_SHA, + FAKE_TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, + FAKE_TLS_DHE_DSS_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_RC4_128_SHA, + FAKE_TLS_RSA_WITH_RC4_128_MD5, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_128_CBC_SHA256, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &SNIExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + CurveP256, + CurveP384, + CurveP521, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // pointFormatUncompressed + }, + }, + &SessionTicketExtension{}, + &NPNExtension{}, + &ALPNExtension{ + AlpnProtocols: []string{ + "spdy/2", + "spdy/3", + "spdy/3.1", + "http/1.1", + }, + }, + &FakeChannelIDExtension{ + OldExtensionID: true, + }, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + PKCS1WithSHA256, + PKCS1WithSHA384, + PKCS1WithSHA1, + ECDSAWithP256AndSHA256, + ECDSAWithP384AndSHA384, + ECDSAWithSHA1, + FakeSHA256WithDSA, + FakeSHA1WithDSA, + }, + }, + }, + }, nil + case Hello360_11_0: + return ClientHelloSpec{ + TLSVersMin: VersionTLS10, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_3DES_EDE_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // uncompressed + }, + }, + &SessionTicketExtension{}, + &ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + PKCS1WithSHA1, + }, + }, + &SCTExtension{}, + &FakeChannelIDExtension{ + OldExtensionID: false, + }, + &KeyShareExtension{ + KeyShares: []KeyShare{ + { + Group: GREASE_PLACEHOLDER, + Data: []byte{ + 0, + }, + }, + { + Group: X25519, + }, + }, + }, + &PSKKeyExchangeModesExtension{ + Modes: []uint8{ + PskModeDHE, + }, + }, + &SupportedVersionsExtension{ + Versions: []uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }, + }, + &UtlsCompressCertExtension{ + Algorithms: []CertCompressionAlgo{ + CertCompressionBrotli, + }, + }, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{ + GetPaddingLen: BoringPaddingStyle, + }, + }, + }, nil + case HelloQQ_11_1: + return ClientHelloSpec{ + TLSVersMin: VersionTLS10, + TLSVersMax: VersionTLS13, + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []uint8{ + 0x0, // no compression + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{ + Renegotiation: RenegotiateOnceAsClient, + }, + &SupportedCurvesExtension{ + Curves: []CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }, + }, + &SupportedPointsExtension{ + SupportedPoints: []uint8{ + 0x0, // uncompressed + }, + }, + &SessionTicketExtension{}, + &ALPNExtension{ + AlpnProtocols: []string{ + "h2", + "http/1.1", + }, + }, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{ + SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }, + }, + &SCTExtension{}, + &KeyShareExtension{ + KeyShares: []KeyShare{ + { + Group: GREASE_PLACEHOLDER, + Data: []byte{ + 0, + }, + }, + { + Group: X25519, + }, + }, + }, + &PSKKeyExchangeModesExtension{ + Modes: []uint8{ + PskModeDHE, + }, + }, + &SupportedVersionsExtension{ + Versions: []uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + VersionTLS11, + VersionTLS10, + }, + }, + &UtlsCompressCertExtension{ + Algorithms: []CertCompressionAlgo{ + CertCompressionBrotli, + }, + }, + &ApplicationSettingsExtension{ + SupportedProtocols: []string{ + "h2", + }, + }, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{ + GetPaddingLen: BoringPaddingStyle, + }, + }, + }, nil + case HelloChrome_100_PSK: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: []TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPreSharedKeyExtension{}, + }, + }, nil + case HelloChrome_112_PSK_Shuf: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPreSharedKeyExtension{}, + }), + }, nil + case HelloChrome_114_Padding_PSK_Shuf: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle}, + &UtlsPreSharedKeyExtension{}, + }), + }, nil + // Chrome w/ Post-Quantum Key Agreement + case HelloChrome_115_PQ_PSK: + return ClientHelloSpec{ + CipherSuites: []uint16{ + GREASE_PLACEHOLDER, + TLS_AES_128_GCM_SHA256, + TLS_AES_256_GCM_SHA384, + TLS_CHACHA20_POLY1305_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, + TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + TLS_RSA_WITH_AES_128_GCM_SHA256, + TLS_RSA_WITH_AES_256_GCM_SHA384, + TLS_RSA_WITH_AES_128_CBC_SHA, + TLS_RSA_WITH_AES_256_CBC_SHA, + }, + CompressionMethods: []byte{ + 0x00, // compressionNone + }, + Extensions: ShuffleChromeTLSExtensions([]TLSExtension{ + &UtlsGREASEExtension{}, + &SNIExtension{}, + &ExtendedMasterSecretExtension{}, + &RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient}, + &SupportedCurvesExtension{[]CurveID{ + GREASE_PLACEHOLDER, + X25519Kyber768Draft00, + X25519, + CurveP256, + CurveP384, + }}, + &SupportedPointsExtension{SupportedPoints: []byte{ + 0x00, // pointFormatUncompressed + }}, + &SessionTicketExtension{}, + &ALPNExtension{AlpnProtocols: []string{"h2", "http/1.1"}}, + &StatusRequestExtension{}, + &SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []SignatureScheme{ + ECDSAWithP256AndSHA256, + PSSWithSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PSSWithSHA384, + PKCS1WithSHA384, + PSSWithSHA512, + PKCS1WithSHA512, + }}, + &SCTExtension{}, + &KeyShareExtension{[]KeyShare{ + {Group: CurveID(GREASE_PLACEHOLDER), Data: []byte{0}}, + {Group: X25519Kyber768Draft00}, + {Group: X25519}, + }}, + &PSKKeyExchangeModesExtension{[]uint8{ + PskModeDHE, + }}, + &SupportedVersionsExtension{[]uint16{ + GREASE_PLACEHOLDER, + VersionTLS13, + VersionTLS12, + }}, + &UtlsCompressCertExtension{[]CertCompressionAlgo{ + CertCompressionBrotli, + }}, + &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}}, + &UtlsGREASEExtension{}, + &UtlsPreSharedKeyExtension{}, + }), + }, nil + default: + if id.Client == helloRandomized || id.Client == helloRandomizedALPN || id.Client == helloRandomizedNoALPN { + // Use empty values as they can be filled later by UConn.ApplyPreset or manually. + return generateRandomizedSpec(&id, "", nil) + } + + return ClientHelloSpec{}, fmt.Errorf("%w: %s", ErrUnknownClientHelloID, id.Str()) + } +} + +// ShuffleChromeTLSExtensions shuffles the extensions in the ClientHelloSpec to avoid ossification. +// It shuffles every extension except GREASE, padding and pre_shared_key extensions. +// +// This feature was first introduced by Chrome 106. +func ShuffleChromeTLSExtensions(exts []TLSExtension) []TLSExtension { + // unshufCheck checks if the exts[idx] is a GREASE/padding/pre_shared_key extension, + // and returns true on success. For these extensions are considered positionally invariant. + var skipShuf = func(idx int, exts []TLSExtension) bool { + switch exts[idx].(type) { + case *UtlsGREASEExtension, *UtlsPaddingExtension, PreSharedKeyExtension: + return true + default: + return false + } + } + + // Shuffle other extensions + randInt64, err := crand.Int(crand.Reader, big.NewInt(math.MaxInt64)) + if err != nil { + // warning: random could be deterministic + rand.Shuffle(len(exts), func(i, j int) { + if skipShuf(i, exts) || skipShuf(j, exts) { + return // do not shuffle some of the extensions + } + exts[i], exts[j] = exts[j], exts[i] + }) + fmt.Println("Warning: failed to use a cryptographically secure random number generator. The shuffle can be deterministic.") + } else { + rand.New(rand.NewSource(randInt64.Int64())).Shuffle(len(exts), func(i, j int) { + if skipShuf(i, exts) || skipShuf(j, exts) { + return // do not shuffle some of the extensions + } + exts[i], exts[j] = exts[j], exts[i] + }) + } + + return exts +} + +func (uconn *UConn) applyPresetByID(id ClientHelloID) (err error) { + + if uconn.clientHelloSpec == nil { + var spec ClientHelloSpec + uconn.ClientHelloID = id + + // choose/generate the spec + switch id.Client { + case helloRandomized, helloRandomizedNoALPN, helloRandomizedALPN: + spec, err = uconn.generateRandomizedSpec() + if err != nil { + return err + } + case helloCustom: + return nil + default: + spec, err = UTLSIdToSpec(id) + if err != nil { + return err + } + } + + uconn.clientHelloSpec = &spec + } + + return uconn.ApplyPreset(uconn.clientHelloSpec) +} + +// ApplyPreset should only be used in conjunction with HelloCustom to apply custom specs. +// Fields of TLSExtensions that are slices/pointers are shared across different connections with +// same ClientHelloSpec. It is advised to use different specs and avoid any shared state. +func (uconn *UConn) ApplyPreset(p *ClientHelloSpec) error { + var err error + + err = uconn.SetTLSVers(p.TLSVersMin, p.TLSVersMax, p.Extensions) + if err != nil { + return err + } + + privateHello, clientKeySharePrivate, ech, err := uconn.makeClientHelloForApplyPreset() + if err != nil { + return err + } + uconn.HandshakeState.Hello = privateHello.getPublicPtr() + if clientKeySharePrivate != nil { + uconn.HandshakeState.State13.KeyShareKeys = clientKeySharePrivate.ToPublic() + } else { + uconn.HandshakeState.State13.KeyShareKeys = &KeySharePrivateKeys{} + } + uconn.echCtx = ech + hello := uconn.HandshakeState.Hello + + switch len(hello.Random) { + case 0: + hello.Random = make([]byte, 32) + _, err := io.ReadFull(uconn.config.rand(), hello.Random) + if err != nil { + return errors.New("tls: short read from Rand: " + err.Error()) + } + case 32: + // carry on + default: + return errors.New("ClientHello expected length: 32 bytes. Got: " + + strconv.Itoa(len(hello.Random)) + " bytes") + } + + if len(hello.CompressionMethods) == 0 { + hello.CompressionMethods = []uint8{compressionNone} + } + + // Currently, GREASE is assumed to come from BoringSSL + grease_bytes := make([]byte, 2*ssl_grease_last_index) + grease_extensions_seen := 0 + _, err = io.ReadFull(uconn.config.rand(), grease_bytes) + if err != nil { + return errors.New("tls: short read from Rand: " + err.Error()) + } + for i := range uconn.greaseSeed { + uconn.greaseSeed[i] = binary.LittleEndian.Uint16(grease_bytes[2*i : 2*i+2]) + } + if GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_extension1) == GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_extension2) { + uconn.greaseSeed[ssl_grease_extension2] ^= 0x1010 + } + + hello.CipherSuites = make([]uint16, len(p.CipherSuites)) + copy(hello.CipherSuites, p.CipherSuites) + for i := range hello.CipherSuites { + if isGREASEUint16(hello.CipherSuites[i]) { // just in case the user set a GREASE value instead of unGREASEd + hello.CipherSuites[i] = GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_cipher) + } + } + + // A random session ID is used to detect when the server accepted a ticket + // and is resuming a session (see RFC 5077). In TLS 1.3, it's always set as + // a compatibility measure (see RFC 8446, Section 4.1.2). + // + // The session ID is not set for QUIC connections (see RFC 9001, Section 8.4). + if uconn.quic == nil { + var sessionID [32]byte + _, err = io.ReadFull(uconn.config.rand(), sessionID[:]) + if err != nil { + return err + } + uconn.HandshakeState.Hello.SessionId = sessionID[:] + } + + uconn.Extensions = make([]TLSExtension, len(p.Extensions)) + copy(uconn.Extensions, p.Extensions) + + // Check whether NPN extension actually exists + var haveNPN bool + + // reGrease, and point things to each other + for _, e := range uconn.Extensions { + switch ext := e.(type) { + case *SNIExtension: + if ext.ServerName == "" { + ext.ServerName = uconn.config.ServerName + } + case *UtlsGREASEExtension: + switch grease_extensions_seen { + case 0: + ext.Value = GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_extension1) + case 1: + ext.Value = GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_extension2) + ext.Body = []byte{0} + default: + return errors.New("at most 2 grease extensions are supported") + } + grease_extensions_seen += 1 + case *SupportedCurvesExtension: + for i := range ext.Curves { + if isGREASEUint16(uint16(ext.Curves[i])) { + ext.Curves[i] = CurveID(GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_group)) + } + } + case *KeyShareExtension: + preferredCurveIsSet := false + for i := range ext.KeyShares { + curveID := ext.KeyShares[i].Group + if isGREASEUint16(uint16(curveID)) { // just in case the user set a GREASE value instead of unGREASEd + ext.KeyShares[i].Group = CurveID(GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_group)) + continue + } + if len(ext.KeyShares[i].Data) > 1 { + continue + } + + if curveID == X25519MLKEM768 || curveID == X25519Kyber768Draft00 { + ecdheKey, err := generateECDHEKey(uconn.config.rand(), X25519) + if err != nil { + return err + } + seed := make([]byte, mlkem.SeedSize) + if _, err := io.ReadFull(uconn.config.rand(), seed); err != nil { + return err + } + mlkemKey, err := mlkem.NewDecapsulationKey768(seed) + if err != nil { + return err + } + + if curveID == X25519Kyber768Draft00 { + ext.KeyShares[i].Data = append(ecdheKey.PublicKey().Bytes(), mlkemKey.EncapsulationKey().Bytes()...) + } else { + ext.KeyShares[i].Data = append(mlkemKey.EncapsulationKey().Bytes(), ecdheKey.PublicKey().Bytes()...) + } + if !preferredCurveIsSet { + // only do this once for the first non-grease curve + uconn.HandshakeState.State13.KeyShareKeys.mlkem = mlkemKey + preferredCurveIsSet = true + } + + if len(ext.KeyShares) > i+1 && ext.KeyShares[i+1].Group == X25519 { + // Reuse the same X25519 ephemeral key for both keyshares, as allowed by draft-ietf-tls-hybrid-design-09, Section 3.2. + uconn.HandshakeState.State13.KeyShareKeys.Ecdhe = ecdheKey + ext.KeyShares[i+1].Data = ecdheKey.PublicKey().Bytes() + } + } else { + ecdheKey, err := generateECDHEKey(uconn.config.rand(), curveID) + if err != nil { + return fmt.Errorf("unsupported Curve in KeyShareExtension: %v."+ + "To mimic it, fill the Data(key) field manually", curveID) + } + + ext.KeyShares[i].Data = ecdheKey.PublicKey().Bytes() + if !preferredCurveIsSet { + // only do this once for the first non-grease curve + uconn.HandshakeState.State13.KeyShareKeys.Ecdhe = ecdheKey + preferredCurveIsSet = true + } + } + } + case *SupportedVersionsExtension: + for i := range ext.Versions { + if isGREASEUint16(ext.Versions[i]) { // just in case the user set a GREASE value instead of unGREASEd + ext.Versions[i] = GetBoringGREASEValue(uconn.greaseSeed, ssl_grease_version) + } + } + case *NPNExtension: + haveNPN = true + } + } + + // The default golang behavior in makeClientHello always sets NextProtoNeg if NextProtos is set, + // but NextProtos is also used by ALPN and our spec nmay not actually have a NPN extension + hello.NextProtoNeg = haveNPN + + err = uconn.sessionController.syncSessionExts() + if err != nil { + return err + } + + return nil +} + +func (uconn *UConn) generateRandomizedSpec() (ClientHelloSpec, error) { + return generateRandomizedSpec(&uconn.ClientHelloID, uconn.serverName, uconn.config.NextProtos) +} + +func generateRandomizedSpec( + id *ClientHelloID, + serverName string, + nextProtos []string, +) (ClientHelloSpec, error) { + p := ClientHelloSpec{} + + if id.Seed == nil { + seed, err := NewPRNGSeed() + if err != nil { + return p, err + } + id.Seed = seed + } + + r, err := newPRNGWithSeed(id.Seed) + if err != nil { + return p, err + } + + if id.Weights == nil { + id.Weights = &DefaultWeights + } + + var WithALPN bool + switch id.Client { + case helloRandomizedALPN: + WithALPN = true + case helloRandomizedNoALPN: + WithALPN = false + case helloRandomized: + if r.FlipWeightedCoin(id.Weights.Extensions_Append_ALPN) { + WithALPN = true + } else { + WithALPN = false + } + default: + return p, fmt.Errorf("using non-randomized ClientHelloID %v to generate randomized spec", id.Client) + } + + p.CipherSuites = defaultCipherSuites() + shuffledSuites, err := shuffledCiphers(r) + if err != nil { + return p, err + } + + if r.FlipWeightedCoin(id.Weights.TLSVersMax_Set_VersionTLS13) { + p.TLSVersMin = VersionTLS10 + p.TLSVersMax = VersionTLS13 + tls13ciphers := make([]uint16, len(defaultCipherSuitesTLS13)) + copy(tls13ciphers, defaultCipherSuitesTLS13) + r.rand.Shuffle(len(tls13ciphers), func(i, j int) { + tls13ciphers[i], tls13ciphers[j] = tls13ciphers[j], tls13ciphers[i] + }) + // appending TLS 1.3 ciphers before TLS 1.2, since that's what popular implementations do + shuffledSuites = append(tls13ciphers, shuffledSuites...) + + // TLS 1.3 forbids RC4 in any configurations + shuffledSuites = removeRC4Ciphers(shuffledSuites) + } else { + p.TLSVersMin = VersionTLS10 + p.TLSVersMax = VersionTLS12 + } + + p.CipherSuites = removeRandomCiphers(r, shuffledSuites, id.Weights.CipherSuites_Remove_RandomCiphers) + + sni := SNIExtension{serverName} + sessionTicket := SessionTicketExtension{} + + sigAndHashAlgos := []SignatureScheme{ + ECDSAWithP256AndSHA256, + PKCS1WithSHA256, + ECDSAWithP384AndSHA384, + PKCS1WithSHA384, + PKCS1WithSHA1, + PKCS1WithSHA512, + } + + if r.FlipWeightedCoin(id.Weights.SigAndHashAlgos_Append_ECDSAWithSHA1) { + sigAndHashAlgos = append(sigAndHashAlgos, ECDSAWithSHA1) + } + if r.FlipWeightedCoin(id.Weights.SigAndHashAlgos_Append_ECDSAWithP521AndSHA512) { + sigAndHashAlgos = append(sigAndHashAlgos, ECDSAWithP521AndSHA512) + } + if r.FlipWeightedCoin(id.Weights.SigAndHashAlgos_Append_PSSWithSHA256) || p.TLSVersMax == VersionTLS13 { + // https://tools.ietf.org/html/rfc8446 says "...RSASSA-PSS (which is mandatory in TLS 1.3)..." + sigAndHashAlgos = append(sigAndHashAlgos, PSSWithSHA256) + if r.FlipWeightedCoin(id.Weights.SigAndHashAlgos_Append_PSSWithSHA384_PSSWithSHA512) { + // these usually go together + sigAndHashAlgos = append(sigAndHashAlgos, PSSWithSHA384) + sigAndHashAlgos = append(sigAndHashAlgos, PSSWithSHA512) + } + } + + r.rand.Shuffle(len(sigAndHashAlgos), func(i, j int) { + sigAndHashAlgos[i], sigAndHashAlgos[j] = sigAndHashAlgos[j], sigAndHashAlgos[i] + }) + sigAndHash := SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: sigAndHashAlgos} + + status := StatusRequestExtension{} + sct := SCTExtension{} + ems := ExtendedMasterSecretExtension{} + points := SupportedPointsExtension{SupportedPoints: []byte{pointFormatUncompressed}} + + curveIDs := []CurveID{} + if r.FlipWeightedCoin(id.Weights.CurveIDs_Append_X25519) || p.TLSVersMax == VersionTLS13 { + curveIDs = append(curveIDs, X25519) + } + curveIDs = append(curveIDs, CurveP256, CurveP384) + if r.FlipWeightedCoin(id.Weights.CurveIDs_Append_CurveP521) { + curveIDs = append(curveIDs, CurveP521) + } + + curves := SupportedCurvesExtension{curveIDs} + + padding := UtlsPaddingExtension{GetPaddingLen: BoringPaddingStyle} + reneg := RenegotiationInfoExtension{Renegotiation: RenegotiateOnceAsClient} + + p.Extensions = []TLSExtension{ + &sni, + &sessionTicket, + &sigAndHash, + &points, + &curves, + } + + if WithALPN { + if len(nextProtos) == 0 { + // if user didn't specify alpn yet, choose something popular + nextProtos = []string{"h2", "http/1.1"} + } + alpn := ALPNExtension{AlpnProtocols: nextProtos} + p.Extensions = append(p.Extensions, &alpn) + } + + if r.FlipWeightedCoin(id.Weights.Extensions_Append_Padding) || p.TLSVersMax == VersionTLS13 { + // always include for TLS 1.3, since TLS 1.3 ClientHellos are often over 256 bytes + // and that's when padding is required to work around buggy middleboxes + p.Extensions = append(p.Extensions, &padding) + } + if r.FlipWeightedCoin(id.Weights.Extensions_Append_Status) { + p.Extensions = append(p.Extensions, &status) + } + if r.FlipWeightedCoin(id.Weights.Extensions_Append_SCT) { + p.Extensions = append(p.Extensions, &sct) + } + if r.FlipWeightedCoin(id.Weights.Extensions_Append_Reneg) { + p.Extensions = append(p.Extensions, &reneg) + } + if r.FlipWeightedCoin(id.Weights.Extensions_Append_EMS) { + p.Extensions = append(p.Extensions, &ems) + } + if p.TLSVersMax == VersionTLS13 { + ks := KeyShareExtension{[]KeyShare{ + {Group: X25519}, // the key for the group will be generated later + }} + if r.FlipWeightedCoin(id.Weights.FirstKeyShare_Set_CurveP256) { + // do not ADD second keyShare because crypto/tls does not support multiple ecdheParams + // TODO: add it back when they implement multiple keyShares, or implement it oursevles + // ks.KeyShares = append(ks.KeyShares, KeyShare{Group: CurveP256}) + ks.KeyShares[0].Group = CurveP256 + } + pskExchangeModes := PSKKeyExchangeModesExtension{[]uint8{pskModeDHE}} + supportedVersionsExt := SupportedVersionsExtension{ + Versions: makeSupportedVersions(p.TLSVersMin, p.TLSVersMax), + } + p.Extensions = append(p.Extensions, &ks, &pskExchangeModes, &supportedVersionsExt) + + // Randomly add an ALPS extension. ALPS is TLS 1.3-only and may only + // appear when an ALPN extension is present + // (https://datatracker.ietf.org/doc/html/draft-vvv-tls-alps-01#section-3). + // ALPS is a draft specification at this time, but appears in + // Chrome/BoringSSL. + if WithALPN { + + // ALPS is a new addition to generateRandomizedSpec. Use a salted + // seed to create a new, independent PRNG, so that a seed used + // with the previous version of generateRandomizedSpec will + // produce the exact same spec as long as ALPS isn't selected. + r, err := newPRNGWithSaltedSeed(id.Seed, "ALPS") + if err != nil { + return p, err + } + if r.FlipWeightedCoin(id.Weights.Extensions_Append_ALPS) { + // As with the ALPN case above, default to something popular + // (unlike ALPN, ALPS can't yet be specified in uconn.config). + alps := &ApplicationSettingsExtension{SupportedProtocols: []string{"h2"}} + p.Extensions = append(p.Extensions, alps) + } + } + + // TODO: randomly add DelegatedCredentialsExtension, once it is + // sufficiently popular. + } + r.rand.Shuffle(len(p.Extensions), func(i, j int) { + p.Extensions[i], p.Extensions[j] = p.Extensions[j], p.Extensions[i] + }) + + return p, nil +} + +func removeRandomCiphers(r *prng, s []uint16, maxRemovalProbability float64) []uint16 { + // removes elements in place + // probability to remove increases for further elements + // never remove first cipher + if len(s) <= 1 { + return s + } + + // remove random elements + floatLen := float64(len(s)) + sliceLen := len(s) + for i := 1; i < sliceLen; i++ { + if r.FlipWeightedCoin(maxRemovalProbability * float64(i) / floatLen) { + s = append(s[:i], s[i+1:]...) + sliceLen-- + i-- + } + } + return s[:sliceLen] +} + +func shuffledCiphers(r *prng) ([]uint16, error) { + ciphers := make(sortableCiphers, len(cipherSuites)) + perm := r.Perm(len(cipherSuites)) + for i, suite := range cipherSuites { + ciphers[i] = sortableCipher{suite: suite.id, + isObsolete: ((suite.flags & suiteTLS12) == 0), + randomTag: perm[i]} + } + sort.Sort(ciphers) + return ciphers.GetCiphers(), nil +} + +type sortableCipher struct { + isObsolete bool + randomTag int + suite uint16 +} + +type sortableCiphers []sortableCipher + +func (ciphers sortableCiphers) Len() int { + return len(ciphers) +} + +func (ciphers sortableCiphers) Less(i, j int) bool { + if ciphers[i].isObsolete && !ciphers[j].isObsolete { + return false + } + if ciphers[j].isObsolete && !ciphers[i].isObsolete { + return true + } + return ciphers[i].randomTag < ciphers[j].randomTag +} + +func (ciphers sortableCiphers) Swap(i, j int) { + ciphers[i], ciphers[j] = ciphers[j], ciphers[i] +} + +func (ciphers sortableCiphers) GetCiphers() []uint16 { + cipherIDs := make([]uint16, len(ciphers)) + for i := range ciphers { + cipherIDs[i] = ciphers[i].suite + } + return cipherIDs +} + +func removeRC4Ciphers(s []uint16) []uint16 { + // removes elements in place + sliceLen := len(s) + for i := 0; i < sliceLen; i++ { + cipher := s[i] + if cipher == TLS_ECDHE_ECDSA_WITH_RC4_128_SHA || + cipher == TLS_ECDHE_RSA_WITH_RC4_128_SHA || + cipher == TLS_RSA_WITH_RC4_128_SHA { + s = append(s[:i], s[i+1:]...) + sliceLen-- + i-- + } + } + return s[:sliceLen] +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_pre_shared_key.go b/backend/vendor/github.com/refraction-networking/utls/u_pre_shared_key.go new file mode 100644 index 0000000..f1e4995 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_pre_shared_key.go @@ -0,0 +1,486 @@ +package tls + +import ( + "encoding/json" + "errors" + "io" + + "golang.org/x/crypto/cryptobyte" +) + +var ErrEmptyPsk = errors.New("tls: empty psk detected; remove the psk extension for this connection or set OmitEmptyPsk to true to conceal it in utls") + +type PreSharedKeyCommon struct { + Identities []PskIdentity + Binders [][]byte + BinderKey []byte // this will be used to compute the binder when hello message is ready + EarlySecret []byte + Session *SessionState +} + +// The lifecycle of a PreSharedKeyExtension: +// +// Creation Phase: +// - The extension is created. +// +// Write Phase: +// +// - [writeToUConn() called]: +// +// > - During this phase, it is important to note that implementations should not write any session data to the UConn (Underlying Connection) as the session is not yet loaded. The session context is not active at this point. +// +// Initialization Phase: +// +// - [IsInitialized() called]: +// +// If IsInitialized() returns true +// +// > - GetPreSharedKeyCommon() will be called subsequently and the PSK states in handshake/clientHello will be fully initialized. +// +// If IsInitialized() returns false: +// +// > - [conn.loadSession() called]: +// +// >> - Once the session is available: +// +// >>> - [InitializeByUtls() called]: +// +// >>>> - The InitializeByUtls() method is invoked to initialize the extension based on the loaded session data. +// +// >>>> - This step prepares the extension for further processing. +// +// Marshal Phase: +// +// - [Len() called], [Read() called]: +// +// > - Implementations should marshal the extension into bytes, using placeholder binders to maintain the correct length. +// +// Binders Preparation Phase: +// +// - [PatchBuiltHello(hello) called]: +// +// > - The client hello is already marshaled in the "hello.Raw" format. +// +// > - Implementations are expected to update the binders within the marshaled client hello. +// +// - [GetPreSharedKeyCommon() called]: +// +// > - Implementations should gather and provide the final pre-shared key (PSK) related data. +// +// > - This data will be incorporated into both the clientHello and HandshakeState, ensuring that the PSK-related information is properly set and ready for the handshake process. +type PreSharedKeyExtension interface { + // TLSExtension must be implemented by all PreSharedKeyExtension implementations. + TLSExtension + + // If false is returned, utls will invoke `InitializeByUtls()` for the necessary initialization. + Initializable + + SetOmitEmptyPsk(val bool) + + // InitializeByUtls is invoked when IsInitialized() returns false. + // It initializes the extension using a real and valid TLS 1.3 session. + InitializeByUtls(session *SessionState, earlySecret []byte, binderKey []byte, identities []PskIdentity) + + // GetPreSharedKeyCommon retrieves the final PreSharedKey-related states as defined in PreSharedKeyCommon. + GetPreSharedKeyCommon() PreSharedKeyCommon + + // PatchBuiltHello is called once the hello message is fully applied and marshaled. + // Its purpose is to update the binders of PSK (Pre-Shared Key) identities. + PatchBuiltHello(hello *PubClientHelloMsg) error + + mustEmbedUnimplementedPreSharedKeyExtension() // this works like a type guard +} + +type UnimplementedPreSharedKeyExtension struct{} + +func (UnimplementedPreSharedKeyExtension) mustEmbedUnimplementedPreSharedKeyExtension() {} + +func (*UnimplementedPreSharedKeyExtension) IsInitialized() bool { + panic("tls: IsInitialized is not implemented for the PreSharedKeyExtension") +} + +func (*UnimplementedPreSharedKeyExtension) InitializeByUtls(session *SessionState, earlySecret []byte, binderKey []byte, identities []PskIdentity) { + panic("tls: Initialize is not implemented for the PreSharedKeyExtension") +} + +func (*UnimplementedPreSharedKeyExtension) writeToUConn(*UConn) error { + panic("tls: writeToUConn is not implemented for the PreSharedKeyExtension") +} + +func (*UnimplementedPreSharedKeyExtension) Len() int { + panic("tls: Len is not implemented for the PreSharedKeyExtension") +} + +func (*UnimplementedPreSharedKeyExtension) Read([]byte) (int, error) { + panic("tls: Read is not implemented for the PreSharedKeyExtension") +} + +func (*UnimplementedPreSharedKeyExtension) GetPreSharedKeyCommon() PreSharedKeyCommon { + panic("tls: GetPreSharedKeyCommon is not implemented for the PreSharedKeyExtension") +} + +func (*UnimplementedPreSharedKeyExtension) PatchBuiltHello(hello *PubClientHelloMsg) error { + panic("tls: ReadWithRawHello is not implemented for the PreSharedKeyExtension") +} + +func (*UnimplementedPreSharedKeyExtension) SetOmitEmptyPsk(val bool) { + panic("tls: SetOmitEmptyPsk is not implemented for the PreSharedKeyExtension") +} + +// UtlsPreSharedKeyExtension is an extension used to set the PSK extension in the +// ClientHello. +type UtlsPreSharedKeyExtension struct { + UnimplementedPreSharedKeyExtension + PreSharedKeyCommon + cipherSuite *cipherSuiteTLS13 + cachedLength *int + // Deprecated: Set OmitEmptyPsk in Config instead. + OmitEmptyPsk bool +} + +func (e *UtlsPreSharedKeyExtension) IsInitialized() bool { + return e.Session != nil +} + +func (e *UtlsPreSharedKeyExtension) InitializeByUtls(session *SessionState, earlySecret []byte, binderKey []byte, identities []PskIdentity) { + e.Session = session + e.EarlySecret = earlySecret + e.BinderKey = binderKey + e.cipherSuite = cipherSuiteTLS13ByID(e.Session.cipherSuite) + e.Identities = identities + e.Binders = make([][]byte, 0, len(e.Identities)) + for i := 0; i < len(e.Identities); i++ { + e.Binders = append(e.Binders, make([]byte, e.cipherSuite.hash.Size())) + } +} + +func (e *UtlsPreSharedKeyExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.TicketSupported = true // This doesn't matter though, as utls doesn't care about this field. We write this for consistency. + return nil +} + +func (e *UtlsPreSharedKeyExtension) GetPreSharedKeyCommon() PreSharedKeyCommon { + return e.PreSharedKeyCommon +} + +func pskExtLen(identities []PskIdentity, binders [][]byte) int { + if len(identities) == 0 || len(binders) == 0 { + // If there isn't psk identities, we don't write this ticket to the client hello, and therefore the length should be 0. + return 0 + } + length := 4 // extension type + extension length + length += 2 // identities length + for _, identity := range identities { + length += 2 + len(identity.Label) + 4 // identity length + identity + obfuscated ticket age + } + length += 2 // binders length + for _, binder := range binders { + length += len(binder) + 1 + } + return length +} + +func (e *UtlsPreSharedKeyExtension) Len() int { + if e.Session == nil { + return 0 + } + if e.cachedLength != nil { + return *e.cachedLength + } + length := pskExtLen(e.Identities, e.Binders) + e.cachedLength = &length + return length +} + +func readPskIntoBytes(b []byte, identities []PskIdentity, binders [][]byte) (int, error) { + extLen := pskExtLen(identities, binders) + if extLen == 0 { + return 0, io.EOF + } + if len(b) < extLen { + return 0, io.ErrShortBuffer + } + + b[0] = byte(extensionPreSharedKey >> 8) + b[1] = byte(extensionPreSharedKey) + b[2] = byte((extLen - 4) >> 8) + b[3] = byte(extLen - 4) + + // identities length + identitiesLength := 0 + for _, identity := range identities { + identitiesLength += 2 + len(identity.Label) + 4 // identity length + identity + obfuscated ticket age + } + b[4] = byte(identitiesLength >> 8) + b[5] = byte(identitiesLength) + + // identities + offset := 6 + for _, identity := range identities { + b[offset] = byte(len(identity.Label) >> 8) + b[offset+1] = byte(len(identity.Label)) + offset += 2 + copy(b[offset:], identity.Label) + offset += len(identity.Label) + b[offset] = byte(identity.ObfuscatedTicketAge >> 24) + b[offset+1] = byte(identity.ObfuscatedTicketAge >> 16) + b[offset+2] = byte(identity.ObfuscatedTicketAge >> 8) + b[offset+3] = byte(identity.ObfuscatedTicketAge) + offset += 4 + } + + // binders length + bindersLength := 0 + for _, binder := range binders { + // check if binder size is valid + bindersLength += len(binder) + 1 // binder length + binder + } + b[offset] = byte(bindersLength >> 8) + b[offset+1] = byte(bindersLength) + offset += 2 + + // binders + for _, binder := range binders { + b[offset] = byte(len(binder)) + offset++ + copy(b[offset:], binder) + offset += len(binder) + } + + return extLen, io.EOF +} + +func (e *UtlsPreSharedKeyExtension) SetOmitEmptyPsk(val bool) { + e.OmitEmptyPsk = val +} + +func (e *UtlsPreSharedKeyExtension) Read(b []byte) (int, error) { + if !e.OmitEmptyPsk && e.Len() == 0 { + return 0, ErrEmptyPsk + } + return readPskIntoBytes(b, e.Identities, e.Binders) +} + +func (e *UtlsPreSharedKeyExtension) PatchBuiltHello(hello *PubClientHelloMsg) error { + if e.Len() == 0 { + return nil + } + private := hello.getCachedPrivatePtr() + if private == nil { + private = hello.getPrivatePtr() + } + private.original = hello.Raw + private.pskBinders = e.Binders // set the placeholder to the private Hello + + //--- mirror loadSession() begin ---// + transcript := e.cipherSuite.hash.New() + helloBytes, err := private.marshalWithoutBinders() // no marshal() will be actually called, as we have set the field `raw` + if err != nil { + return err + } + transcript.Write(helloBytes) + pskBinders := [][]byte{e.cipherSuite.finishedHash(e.BinderKey, transcript)} + + if err := private.updateBinders(pskBinders); err != nil { + return err + } + + // copied from handshake_messages.go in 1.22 + lenWithoutBinders := len(helloBytes) + b := cryptobyte.NewFixedBuilder(private.original[:lenWithoutBinders]) + b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) { + for _, binder := range private.pskBinders { + b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) { + b.AddBytes(binder) + }) + } + }) + if out, err := b.Bytes(); err != nil || len(out) != len(private.original) { + return errors.New("tls: internal error: failed to update binders") + } + + //--- mirror loadSession() end ---// + e.Binders = pskBinders + + // no need to care about other PSK related fields, they will be handled separately + + return io.EOF +} + +func (e *UtlsPreSharedKeyExtension) Write(b []byte) (int, error) { + return len(b), nil // ignore the data +} + +func (e *UtlsPreSharedKeyExtension) UnmarshalJSON(_ []byte) error { + return nil // ignore the data +} + +// FakePreSharedKeyExtension is an extension used to set the PSK extension in the +// ClientHello. +// +// It does not compute binders based on ClientHello, but uses the binders specified instead. +// We still need to learn more of the safety +// of hardcoding both Identities and Binders without recalculating the latter. +type FakePreSharedKeyExtension struct { + UnimplementedPreSharedKeyExtension + + Identities []PskIdentity `json:"identities"` + Binders [][]byte `json:"binders"` + // Deprecated: Set OmitEmptyPsk in Config instead. + OmitEmptyPsk bool +} + +func (e *FakePreSharedKeyExtension) IsInitialized() bool { + return e.Identities != nil && e.Binders != nil +} + +func (e *FakePreSharedKeyExtension) InitializeByUtls(session *SessionState, earlySecret []byte, binderKey []byte, identities []PskIdentity) { + panic("InitializeByUtls failed: don't let utls initialize FakePreSharedKeyExtension; provide your own identities and binders or use UtlsPreSharedKeyExtension") +} + +func (e *FakePreSharedKeyExtension) writeToUConn(uc *UConn) error { + if uc.config.ClientSessionCache == nil { + return nil // don't write the extension if there is no session cache + } + if session, ok := uc.config.ClientSessionCache.Get(uc.clientSessionCacheKey()); !ok || session == nil { + return nil // don't write the extension if there is no session cache available for this session + } + uc.HandshakeState.Hello.PskIdentities = e.Identities + uc.HandshakeState.Hello.PskBinders = e.Binders + return nil +} + +func (e *FakePreSharedKeyExtension) Len() int { + return pskExtLen(e.Identities, e.Binders) +} + +func (e *FakePreSharedKeyExtension) SetOmitEmptyPsk(val bool) { + e.OmitEmptyPsk = val +} + +func (e *FakePreSharedKeyExtension) Read(b []byte) (int, error) { + if !e.OmitEmptyPsk && e.Len() == 0 { + return 0, ErrEmptyPsk + } + for _, b := range e.Binders { + if !(anyTrue(validHashLen, func(_ int, valid *int) bool { + return len(b) == *valid + })) { + return 0, errors.New("tls: FakePreSharedKeyExtension.Read failed: invalid binder size") + } + } + + return readPskIntoBytes(b, e.Identities, e.Binders) +} + +func (e *FakePreSharedKeyExtension) GetPreSharedKeyCommon() PreSharedKeyCommon { + return PreSharedKeyCommon{ + Identities: e.Identities, + Binders: e.Binders, + } +} + +var validHashLen = mapSlice(cipherSuitesTLS13, func(c *cipherSuiteTLS13) int { + return c.hash.Size() +}) + +func (*FakePreSharedKeyExtension) PatchBuiltHello(*PubClientHelloMsg) error { + return nil // no need to patch the hello since we don't need to update binders +} + +func (e *FakePreSharedKeyExtension) Write(b []byte) (n int, err error) { + fullLen := len(b) + s := cryptobyte.String(b) + + var identitiesLength uint16 + if !s.ReadUint16(&identitiesLength) { + return 0, errors.New("tls: invalid PSK extension") + } + + // identities + for identitiesLength > 0 { + var identityLength uint16 + if !s.ReadUint16(&identityLength) { + return 0, errors.New("tls: invalid PSK extension") + } + identitiesLength -= 2 + + if identityLength > identitiesLength { + return 0, errors.New("tls: invalid PSK extension") + } + + var identity []byte + if !s.ReadBytes(&identity, int(identityLength)) { + return 0, errors.New("tls: invalid PSK extension") + } + + identitiesLength -= identityLength // identity + + var obfuscatedTicketAge uint32 + if !s.ReadUint32(&obfuscatedTicketAge) { + return 0, errors.New("tls: invalid PSK extension") + } + + e.Identities = append(e.Identities, PskIdentity{ + Label: identity, + ObfuscatedTicketAge: obfuscatedTicketAge, + }) + + identitiesLength -= 4 // obfuscated ticket age + } + + var bindersLength uint16 + if !s.ReadUint16(&bindersLength) { + return 0, errors.New("tls: invalid PSK extension") + } + + // binders + for bindersLength > 0 { + var binderLength uint8 + if !s.ReadUint8(&binderLength) { + return 0, errors.New("tls: invalid PSK extension") + } + bindersLength -= 1 + + if uint16(binderLength) > bindersLength { + return 0, errors.New("tls: invalid PSK extension") + } + + var binder []byte + if !s.ReadBytes(&binder, int(binderLength)) { + return 0, errors.New("tls: invalid PSK extension") + } + + e.Binders = append(e.Binders, binder) + + bindersLength -= uint16(binderLength) + } + + return fullLen, nil +} + +func (e *FakePreSharedKeyExtension) UnmarshalJSON(data []byte) error { + var pskAccepter struct { + PskIdentities []PskIdentity `json:"identities"` + PskBinders [][]byte `json:"binders"` + } + + if err := json.Unmarshal(data, &pskAccepter); err != nil { + return err + } + + e.Identities = pskAccepter.PskIdentities + e.Binders = pskAccepter.PskBinders + return nil +} + +// type guard +var ( + _ PreSharedKeyExtension = (*UtlsPreSharedKeyExtension)(nil) + _ TLSExtensionJSON = (*UtlsPreSharedKeyExtension)(nil) + _ PreSharedKeyExtension = (*FakePreSharedKeyExtension)(nil) + _ TLSExtensionJSON = (*FakePreSharedKeyExtension)(nil) + _ TLSExtensionWriter = (*FakePreSharedKeyExtension)(nil) +) + +// type ExternalPreSharedKeyExtension struct{} // TODO: wait for whoever cares about external PSK to implement it diff --git a/backend/vendor/github.com/refraction-networking/utls/u_prng.go b/backend/vendor/github.com/refraction-networking/utls/u_prng.go new file mode 100644 index 0000000..cbd8408 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_prng.go @@ -0,0 +1,188 @@ +/* + * Copyright (c) 2019, Psiphon Inc. + * All rights reserved. + * + * Released under utls licence: + * https://github.com/refraction-networking/utls/blob/master/LICENSE + */ + +// This code is a pared down version of: +// https://github.com/Psiphon-Labs/psiphon-tunnel-core/blob/158caea562287284cc3fa5fcd1b3c97b1addf659/psiphon/common/prng/prng.go + +package tls + +import ( + crypto_rand "crypto/rand" + "encoding/binary" + "io" + "math" + "math/rand" + "sync" + + "golang.org/x/crypto/hkdf" + "golang.org/x/crypto/sha3" +) + +const ( + PRNGSeedLength = 32 +) + +// PRNGSeed is a PRNG seed. +type PRNGSeed [PRNGSeedLength]byte + +// NewPRNGSeed creates a new PRNG seed using crypto/rand.Read. +func NewPRNGSeed() (*PRNGSeed, error) { + seed := new(PRNGSeed) + _, err := crypto_rand.Read(seed[:]) + if err != nil { + return nil, err + } + return seed, nil +} + +// newSaltedPRNGSeed creates a new seed derived from an existing seed and a +// salt. A HKDF is applied to the seed and salt. +// +// newSaltedPRNGSeed is intended for use cases where a single seed needs to be +// used in distinct contexts to produce independent random streams. +func newSaltedPRNGSeed(seed *PRNGSeed, salt string) (*PRNGSeed, error) { + saltedSeed := new(PRNGSeed) + _, err := io.ReadFull( + hkdf.New(sha3.New256, seed[:], []byte(salt), nil), saltedSeed[:]) + if err != nil { + return nil, err + } + return saltedSeed, nil +} + +// prng is a seeded, unbiased PRNG based on SHAKE256. that is suitable for use +// cases such as obfuscation. Seeding is based on crypto/rand.Read. +// +// This PRNG is _not_ for security use cases including production cryptographic +// key generation. +// +// It is safe to make concurrent calls to a PRNG instance. +// +// PRNG conforms to io.Reader and math/rand.Source, with additional helper +// functions. +type prng struct { + rand *rand.Rand + randomStreamMutex sync.Mutex + randomStream sha3.ShakeHash +} + +// newPRNG generates a seed and creates a PRNG with that seed. +func newPRNG() (*prng, error) { + seed, err := NewPRNGSeed() + if err != nil { + return nil, err + } + return newPRNGWithSeed(seed) +} + +// newPRNGWithSeed initializes a new PRNG using an existing seed. +func newPRNGWithSeed(seed *PRNGSeed) (*prng, error) { + shake := sha3.NewShake256() + _, err := shake.Write(seed[:]) + if err != nil { + return nil, err + } + p := &prng{ + randomStream: shake, + } + p.rand = rand.New(p) + return p, nil +} + +// newPRNGWithSaltedSeed initializes a new PRNG using a seed derived from an +// existing seed and a salt with NewSaltedSeed. +func newPRNGWithSaltedSeed(seed *PRNGSeed, salt string) (*prng, error) { + saltedSeed, err := newSaltedPRNGSeed(seed, salt) + if err != nil { + return nil, err + } + return newPRNGWithSeed(saltedSeed) +} + +// Read reads random bytes from the PRNG stream into b. Read conforms to +// io.Reader and always returns len(p), nil. +func (p *prng) Read(b []byte) (int, error) { + p.randomStreamMutex.Lock() + defer p.randomStreamMutex.Unlock() + + // ShakeHash.Read never returns an error: + // https://godoc.org/golang.org/x/crypto/sha3#ShakeHash + _, _ = io.ReadFull(p.randomStream, b) + + return len(b), nil +} + +// Int63 is equivalent to math/read.Int63. +func (p *prng) Int63() int64 { + i := p.Uint64() + return int64(i & (1<<63 - 1)) +} + +// Int63 is equivalent to math/read.Uint64. +func (p *prng) Uint64() uint64 { + var b [8]byte + p.Read(b[:]) + return binary.BigEndian.Uint64(b[:]) +} + +// Seed must exist in order to use a PRNG as a math/rand.Source. This call is +// not supported and ignored. +func (p *prng) Seed(_ int64) { +} + +// FlipWeightedCoin returns the result of a weighted +// random coin flip. If the weight is 0.5, the outcome +// is equally likely to be true or false. If the weight +// is 1.0, the outcome is always true, and if the +// weight is 0.0, the outcome is always false. +// +// Input weights > 1.0 are treated as 1.0. +func (p *prng) FlipWeightedCoin(weight float64) bool { + if weight > 1.0 { + weight = 1.0 + } + f := float64(p.Int63()) / float64(math.MaxInt64) + return f > 1.0-weight +} + +// Intn is equivalent to math/read.Intn, except it returns 0 if n <= 0 +// instead of panicking. +func (p *prng) Intn(n int) int { + if n <= 0 { + return 0 + } + return p.rand.Intn(n) +} + +// Int63n is equivalent to math/read.Int63n, except it returns 0 if n <= 0 +// instead of panicking. +func (p *prng) Int63n(n int64) int64 { + if n <= 0 { + return 0 + } + return p.rand.Int63n(n) +} + +// Intn is equivalent to math/read.Perm. +func (p *prng) Perm(n int) []int { + return p.rand.Perm(n) +} + +// Range selects a random integer in [min, max]. +// If min < 0, min is set to 0. If max < min, min is returned. +func (p *prng) Range(min, max int) int { + if min < 0 { + min = 0 + } + if max < min { + return min + } + n := p.Intn(max - min + 1) + n += min + return n +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_public.go b/backend/vendor/github.com/refraction-networking/utls/u_public.go new file mode 100644 index 0000000..087b41d --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_public.go @@ -0,0 +1,916 @@ +// Copyright 2017 Google Inc. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "crypto" + "crypto/ecdh" + "crypto/mlkem" + "crypto/x509" + "hash" + "time" + + "github.com/cloudflare/circl/kem" +) + +// ClientHandshakeState includes both TLS 1.3-only and TLS 1.2-only states, +// only one of them will be used, depending on negotiated version. +// +// ClientHandshakeState will be converted into and from either +// - clientHandshakeState (TLS 1.2) +// - clientHandshakeStateTLS13 (TLS 1.3) +// +// uTLS will call .handshake() on one of these private internal states, +// to perform TLS handshake using standard crypto/tls implementation. +type PubClientHandshakeState struct { + C *Conn + ServerHello *PubServerHelloMsg + Hello *PubClientHelloMsg + MasterSecret []byte + Session *SessionState + + State12 TLS12OnlyState + State13 TLS13OnlyState + + uconn *UConn +} + +// TLS 1.3 only +type TLS13OnlyState struct { + // Deprecated: Use KeyShareKeys instead. KeyShareKeys will take precedence if both are set. + // Support may be removed in the future. + EcdheKey *ecdh.PrivateKey + // Deprecated: Use KeyShareKeys instead. This variable is no longer used. + // Will be removed in the future. + KeySharesParams *KeySharesParameters + // Deprecated: Use KeyShareKeys instead. This variable is no longer used. + // Will be removed in the future. + KEMKey *KemPrivateKey + + KeyShareKeys *KeySharePrivateKeys + Suite *PubCipherSuiteTLS13 + EarlySecret []byte + BinderKey []byte + CertReq *CertificateRequestMsgTLS13 + UsingPSK bool // don't set this field when building client hello + SentDummyCCS bool + Transcript hash.Hash + TrafficSecret []byte // client_application_traffic_secret_0 +} + +// TLS 1.2 and before only +type TLS12OnlyState struct { + FinishedHash FinishedHash + Suite PubCipherSuite +} + +func (chs *TLS13OnlyState) private13KeyShareKeys() *keySharePrivateKeys { + if chs.KeyShareKeys != nil { + return chs.KeyShareKeys.ToPrivate() + } + + if chs.EcdheKey != nil { + return &keySharePrivateKeys{ + ecdhe: chs.EcdheKey, + } + } + + return nil +} + +// func kyberGoToCircl(kyberKey *mlkem768.DecapsulationKey, ecdhKey *ecdh.PrivateKey) (kem.PrivateKey, error) { +// return hybrid.Kyber768X25519().UnmarshalBinaryPrivateKey(append(ecdhKey.Bytes(), kyberKey.Bytes()...)) +// } + +func (chs *PubClientHandshakeState) toPrivate13() *clientHandshakeStateTLS13 { + if chs == nil { + return nil + } else { + return &clientHandshakeStateTLS13{ + c: chs.C, + serverHello: chs.ServerHello.getPrivatePtr(), + hello: chs.Hello.getPrivatePtr(), + keyShareKeys: chs.State13.private13KeyShareKeys(), + + session: chs.Session, + binderKey: chs.State13.BinderKey, + + certReq: chs.State13.CertReq.toPrivate(), + usingPSK: chs.State13.UsingPSK, + sentDummyCCS: chs.State13.SentDummyCCS, + suite: chs.State13.Suite.toPrivate(), + transcript: chs.State13.Transcript, + trafficSecret: chs.State13.TrafficSecret, + + uconn: chs.uconn, + } + } +} + +func (chs13 *clientHandshakeStateTLS13) toPublic13() *PubClientHandshakeState { + if chs13 == nil { + return nil + } else { + tls13State := TLS13OnlyState{ + KeyShareKeys: chs13.keyShareKeys.ToPublic(), + EarlySecret: chs13.earlySecret.Secret(), + BinderKey: chs13.binderKey, + CertReq: chs13.certReq.toPublic(), + UsingPSK: chs13.usingPSK, + SentDummyCCS: chs13.sentDummyCCS, + Suite: chs13.suite.toPublic(), + TrafficSecret: chs13.trafficSecret, + Transcript: chs13.transcript, + } + return &PubClientHandshakeState{ + C: chs13.c, + ServerHello: chs13.serverHello.getPublicPtr(), + Hello: chs13.hello.getPublicPtr(), + + Session: chs13.session, + + MasterSecret: chs13.masterSecret.Secret(), + + State13: tls13State, + + uconn: chs13.uconn, + } + } +} + +func (chs *PubClientHandshakeState) toPrivate12() *clientHandshakeState { + if chs == nil { + return nil + } else { + return &clientHandshakeState{ + c: chs.C, + serverHello: chs.ServerHello.getPrivatePtr(), + hello: chs.Hello.getPrivatePtr(), + suite: chs.State12.Suite.getPrivatePtr(), + session: chs.Session, + + masterSecret: chs.MasterSecret, + + finishedHash: chs.State12.FinishedHash.getPrivateObj(), + + uconn: chs.uconn, + } + } +} + +func (chs12 *clientHandshakeState) toPublic12() *PubClientHandshakeState { + if chs12 == nil { + return nil + } else { + tls12State := TLS12OnlyState{ + Suite: chs12.suite.getPublicObj(), + FinishedHash: chs12.finishedHash.getPublicObj(), + } + return &PubClientHandshakeState{ + C: chs12.c, + ServerHello: chs12.serverHello.getPublicPtr(), + Hello: chs12.hello.getPublicPtr(), + + Session: chs12.session, + + MasterSecret: chs12.masterSecret, + + State12: tls12State, + + uconn: chs12.uconn, + } + } +} + +// type EcdheParameters interface { +// ecdheParameters +// } + +type CertificateRequestMsgTLS13 struct { + // Deprecated: crypto/tls no longer use this variable. This field won't be read or used by utls, but will still be populated. + // Support may be removed in the future. + Raw []byte + + OcspStapling bool + Scts bool + SupportedSignatureAlgorithms []SignatureScheme + SupportedSignatureAlgorithmsCert []SignatureScheme + CertificateAuthorities [][]byte +} + +func (crm *certificateRequestMsgTLS13) toPublic() *CertificateRequestMsgTLS13 { + if crm == nil { + return nil + } else { + rawBytes := []byte{} + if raw, err := crm.marshal(); err == nil { + rawBytes = raw + } + + return &CertificateRequestMsgTLS13{ + Raw: rawBytes, + OcspStapling: crm.ocspStapling, + Scts: crm.scts, + SupportedSignatureAlgorithms: crm.supportedSignatureAlgorithms, + SupportedSignatureAlgorithmsCert: crm.supportedSignatureAlgorithmsCert, + CertificateAuthorities: crm.certificateAuthorities, + } + } +} + +func (crm *CertificateRequestMsgTLS13) toPrivate() *certificateRequestMsgTLS13 { + if crm == nil { + return nil + } else { + return &certificateRequestMsgTLS13{ + ocspStapling: crm.OcspStapling, + scts: crm.Scts, + supportedSignatureAlgorithms: crm.SupportedSignatureAlgorithms, + supportedSignatureAlgorithmsCert: crm.SupportedSignatureAlgorithmsCert, + certificateAuthorities: crm.CertificateAuthorities, + } + } +} + +type PubCipherSuiteTLS13 struct { + Id uint16 + KeyLen int + Aead func(key, fixedNonce []byte) aead + Hash crypto.Hash +} + +func (c *cipherSuiteTLS13) toPublic() *PubCipherSuiteTLS13 { + if c == nil { + return nil + } else { + return &PubCipherSuiteTLS13{ + Id: c.id, + KeyLen: c.keyLen, + Aead: c.aead, + Hash: c.hash, + } + } +} + +func (c *PubCipherSuiteTLS13) toPrivate() *cipherSuiteTLS13 { + if c == nil { + return nil + } else { + return &cipherSuiteTLS13{ + id: c.Id, + keyLen: c.KeyLen, + aead: c.Aead, + hash: c.Hash, + } + } +} + +type PubServerHelloMsg struct { + Raw []byte // renamed to serverHelloMsg.original in crypto/tls + Vers uint16 + Random []byte + SessionId []byte + CipherSuite uint16 + CompressionMethod uint8 + NextProtoNeg bool + NextProtos []string + OcspStapling bool + Scts [][]byte + ExtendedMasterSecret bool + TicketSupported bool // used by go tls to determine whether to add the session ticket ext + SecureRenegotiation []byte + SecureRenegotiationSupported bool + AlpnProtocol string + + // 1.3 + SupportedVersion uint16 + ServerShare keyShare + SelectedIdentityPresent bool + SelectedIdentity uint16 + Cookie []byte // HelloRetryRequest extension + SelectedGroup CurveID // HelloRetryRequest extension + +} + +func (shm *PubServerHelloMsg) getPrivatePtr() *serverHelloMsg { + if shm == nil { + return nil + } else { + return &serverHelloMsg{ + original: shm.Raw, + vers: shm.Vers, + random: shm.Random, + sessionId: shm.SessionId, + cipherSuite: shm.CipherSuite, + compressionMethod: shm.CompressionMethod, + nextProtoNeg: shm.NextProtoNeg, + nextProtos: shm.NextProtos, + ocspStapling: shm.OcspStapling, + scts: shm.Scts, + extendedMasterSecret: shm.ExtendedMasterSecret, + ticketSupported: shm.TicketSupported, + secureRenegotiation: shm.SecureRenegotiation, + secureRenegotiationSupported: shm.SecureRenegotiationSupported, + alpnProtocol: shm.AlpnProtocol, + supportedVersion: shm.SupportedVersion, + serverShare: shm.ServerShare, + selectedIdentityPresent: shm.SelectedIdentityPresent, + selectedIdentity: shm.SelectedIdentity, + cookie: shm.Cookie, + selectedGroup: shm.SelectedGroup, + } + } +} + +func (shm *serverHelloMsg) getPublicPtr() *PubServerHelloMsg { + if shm == nil { + return nil + } else { + return &PubServerHelloMsg{ + Raw: shm.original, + Vers: shm.vers, + Random: shm.random, + SessionId: shm.sessionId, + CipherSuite: shm.cipherSuite, + CompressionMethod: shm.compressionMethod, + NextProtoNeg: shm.nextProtoNeg, + NextProtos: shm.nextProtos, + OcspStapling: shm.ocspStapling, + Scts: shm.scts, + ExtendedMasterSecret: shm.extendedMasterSecret, + TicketSupported: shm.ticketSupported, + SecureRenegotiation: shm.secureRenegotiation, + SecureRenegotiationSupported: shm.secureRenegotiationSupported, + AlpnProtocol: shm.alpnProtocol, + SupportedVersion: shm.supportedVersion, + ServerShare: shm.serverShare, + SelectedIdentityPresent: shm.selectedIdentityPresent, + SelectedIdentity: shm.selectedIdentity, + Cookie: shm.cookie, + SelectedGroup: shm.selectedGroup, + } + } +} + +type PubClientHelloMsg struct { + Raw []byte // renamed to clientHelloMsg.original in crypto/tls + Vers uint16 + Random []byte + SessionId []byte + CipherSuites []uint16 + CompressionMethods []uint8 + NextProtoNeg bool + ServerName string + OcspStapling bool + Scts bool + Ems bool // [uTLS] actually implemented due to its prevalence + SupportedCurves []CurveID + SupportedPoints []uint8 + TicketSupported bool + SessionTicket []uint8 + SupportedSignatureAlgorithms []SignatureScheme + SecureRenegotiation []byte + SecureRenegotiationSupported bool + AlpnProtocols []string + + // 1.3 + SupportedSignatureAlgorithmsCert []SignatureScheme + SupportedVersions []uint16 + Cookie []byte + KeyShares []KeyShare + EarlyData bool + PskModes []uint8 + PskIdentities []PskIdentity + PskBinders [][]byte + QuicTransportParameters []byte + + cachedPrivateHello *clientHelloMsg // todo: further optimize to reduce clientHelloMsg construction + encryptedClientHello []byte +} + +func (chm *PubClientHelloMsg) getPrivatePtr() *clientHelloMsg { + if chm == nil { + return nil + } else { + private := &clientHelloMsg{ + original: chm.Raw, + vers: chm.Vers, + random: chm.Random, + sessionId: chm.SessionId, + cipherSuites: chm.CipherSuites, + compressionMethods: chm.CompressionMethods, + serverName: chm.ServerName, + ocspStapling: chm.OcspStapling, + supportedCurves: chm.SupportedCurves, + supportedPoints: chm.SupportedPoints, + ticketSupported: chm.TicketSupported, + sessionTicket: chm.SessionTicket, + supportedSignatureAlgorithms: chm.SupportedSignatureAlgorithms, + supportedSignatureAlgorithmsCert: chm.SupportedSignatureAlgorithmsCert, + secureRenegotiationSupported: chm.SecureRenegotiationSupported, + secureRenegotiation: chm.SecureRenegotiation, + extendedMasterSecret: chm.Ems, + alpnProtocols: chm.AlpnProtocols, + scts: chm.Scts, + + supportedVersions: chm.SupportedVersions, + cookie: chm.Cookie, + keyShares: KeyShares(chm.KeyShares).ToPrivate(), + earlyData: chm.EarlyData, + pskModes: chm.PskModes, + pskIdentities: PskIdentities(chm.PskIdentities).ToPrivate(), + pskBinders: chm.PskBinders, + quicTransportParameters: chm.QuicTransportParameters, + encryptedClientHello: chm.encryptedClientHello, + + nextProtoNeg: chm.NextProtoNeg, + } + chm.cachedPrivateHello = private + return private + } +} + +func (chm *PubClientHelloMsg) getCachedPrivatePtr() *clientHelloMsg { + if chm == nil { + return nil + } else { + return chm.cachedPrivateHello + } +} + +func (chm *clientHelloMsg) getPublicPtr() *PubClientHelloMsg { + if chm == nil { + return nil + } else { + return &PubClientHelloMsg{ + Raw: chm.original, + Vers: chm.vers, + Random: chm.random, + SessionId: chm.sessionId, + CipherSuites: chm.cipherSuites, + CompressionMethods: chm.compressionMethods, + NextProtoNeg: chm.nextProtoNeg, + ServerName: chm.serverName, + OcspStapling: chm.ocspStapling, + Scts: chm.scts, + Ems: chm.extendedMasterSecret, + SupportedCurves: chm.supportedCurves, + SupportedPoints: chm.supportedPoints, + TicketSupported: chm.ticketSupported, + SessionTicket: chm.sessionTicket, + SupportedSignatureAlgorithms: chm.supportedSignatureAlgorithms, + SecureRenegotiation: chm.secureRenegotiation, + SecureRenegotiationSupported: chm.secureRenegotiationSupported, + AlpnProtocols: chm.alpnProtocols, + + SupportedSignatureAlgorithmsCert: chm.supportedSignatureAlgorithmsCert, + SupportedVersions: chm.supportedVersions, + Cookie: chm.cookie, + KeyShares: keyShares(chm.keyShares).ToPublic(), + EarlyData: chm.earlyData, + PskModes: chm.pskModes, + PskIdentities: pskIdentities(chm.pskIdentities).ToPublic(), + PskBinders: chm.pskBinders, + QuicTransportParameters: chm.quicTransportParameters, + cachedPrivateHello: chm, + encryptedClientHello: chm.encryptedClientHello, + } + } +} + +// UnmarshalClientHello allows external code to parse raw client hellos. +// It returns nil on failure. +func UnmarshalClientHello(data []byte) *PubClientHelloMsg { + m := &clientHelloMsg{} + if m.unmarshal(data) { + return m.getPublicPtr() + } + return nil +} + +// Marshal allows external code to convert a ClientHello object back into +// raw bytes. +func (chm *PubClientHelloMsg) Marshal() ([]byte, error) { + return chm.getPrivatePtr().marshal() +} + +// A CipherSuite is a specific combination of key agreement, cipher and MAC +// function. All cipher suites currently assume RSA key agreement. +type PubCipherSuite struct { + Id uint16 + // the lengths, in bytes, of the key material needed for each component. + KeyLen int + MacLen int + IvLen int + Ka func(version uint16) keyAgreement + // flags is a bitmask of the suite* values, above. + Flags int + Cipher func(key, iv []byte, isRead bool) interface{} + Mac func(macKey []byte) hash.Hash + Aead func(key, fixedNonce []byte) aead +} + +func (cs *PubCipherSuite) getPrivatePtr() *cipherSuite { + if cs == nil { + return nil + } else { + return &cipherSuite{ + id: cs.Id, + keyLen: cs.KeyLen, + macLen: cs.MacLen, + ivLen: cs.IvLen, + ka: cs.Ka, + flags: cs.Flags, + cipher: cs.Cipher, + mac: cs.Mac, + aead: cs.Aead, + } + } +} + +func (cs *cipherSuite) getPublicObj() PubCipherSuite { + if cs == nil { + return PubCipherSuite{} + } else { + return PubCipherSuite{ + Id: cs.id, + KeyLen: cs.keyLen, + MacLen: cs.macLen, + IvLen: cs.ivLen, + Ka: cs.ka, + Flags: cs.flags, + Cipher: cs.cipher, + Mac: cs.mac, + Aead: cs.aead, + } + } +} + +// A FinishedHash calculates the hash of a set of handshake messages suitable +// for including in a Finished message. +type FinishedHash struct { + Client hash.Hash + Server hash.Hash + + // Prior to TLS 1.2, an additional MD5 hash is required. + ClientMD5 hash.Hash + ServerMD5 hash.Hash + + // In TLS 1.2, a full buffer is sadly required. + Buffer []byte + + Version uint16 + Prfv2 prfFunc + + // Deprecated: Use Prfv2 instead. Prfv2 will be used if both are set. + Prf prfFuncOld +} + +type prfFuncOld func(result, secret, label, seed []byte) + +func prfFuncV1ToV2(v1 prfFuncOld) prfFunc { + return func(secret []byte, label string, seed []byte, keyLen int) []byte { + res := make([]byte, keyLen) + v1(res, secret, []byte(label), seed) + return res + } +} + +func prfFuncV2ToV1(v2 prfFunc) prfFuncOld { + return func(result, secret, label, seed []byte) { + copy(result, v2(secret, string(label), seed, len(result))) + } +} + +func (fh *FinishedHash) getPrivateObj() finishedHash { + if fh == nil { + return finishedHash{} + } else { + res := finishedHash{ + client: fh.Client, + server: fh.Server, + clientMD5: fh.ClientMD5, + serverMD5: fh.ServerMD5, + buffer: fh.Buffer, + version: fh.Version, + } + + if fh.Prfv2 != nil { + res.prf = fh.Prfv2 + } else if fh.Prf != nil { + res.prf = prfFuncV1ToV2(fh.Prf) + } + + return res + } +} + +func (fh *finishedHash) getPublicObj() FinishedHash { + if fh == nil { + return FinishedHash{} + } else { + res := FinishedHash{ + Client: fh.client, + Server: fh.server, + ClientMD5: fh.clientMD5, + ServerMD5: fh.serverMD5, + Buffer: fh.buffer, + Version: fh.version, + } + + res.Prfv2 = fh.prf + res.Prf = prfFuncV2ToV1(fh.prf) + + return res + } +} + +// TLS 1.3 Key Share. See RFC 8446, Section 4.2.8. +type KeyShare struct { + Group CurveID `json:"group"` + Data []byte `json:"key_exchange,omitempty"` // optional +} + +type KeyShares []KeyShare +type keyShares []keyShare + +func (kss keyShares) ToPublic() []KeyShare { + var KSS []KeyShare + for _, ks := range kss { + KSS = append(KSS, KeyShare{Data: ks.data, Group: ks.group}) + } + return KSS +} +func (KSS KeyShares) ToPrivate() []keyShare { + var kss []keyShare + for _, KS := range KSS { + kss = append(kss, keyShare{data: KS.Data, group: KS.Group}) + } + return kss +} + +// TLS 1.3 PSK Identity. Can be a Session Ticket, or a reference to a saved +// session. See RFC 8446, Section 4.2.11. +type PskIdentity struct { + Label []byte `json:"identity"` + ObfuscatedTicketAge uint32 `json:"obfuscated_ticket_age"` +} + +type PskIdentities []PskIdentity +type pskIdentities []pskIdentity + +func (pss pskIdentities) ToPublic() []PskIdentity { + var PSS []PskIdentity + for _, ps := range pss { + PSS = append(PSS, PskIdentity{Label: ps.label, ObfuscatedTicketAge: ps.obfuscatedTicketAge}) + } + return PSS +} + +func (PSS PskIdentities) ToPrivate() []pskIdentity { + var pss []pskIdentity + for _, PS := range PSS { + pss = append(pss, pskIdentity{label: PS.Label, obfuscatedTicketAge: PS.ObfuscatedTicketAge}) + } + return pss +} + +// ClientSessionState is public, but all its fields are private. Let's add setters, getters and constructor + +// ClientSessionState contains the state needed by clients to resume TLS sessions. +func MakeClientSessionState( + SessionTicket []uint8, + Vers uint16, + CipherSuite uint16, + MasterSecret []byte, + ServerCertificates []*x509.Certificate, + VerifiedChains [][]*x509.Certificate) *ClientSessionState { + // TODO: Add EMS to this constructor in uTLS v2 + css := &ClientSessionState{ + session: &SessionState{ + version: Vers, + cipherSuite: CipherSuite, + secret: MasterSecret, + peerCertificates: ServerCertificates, + verifiedChains: VerifiedChains, + ticket: SessionTicket, + }, + } + return css +} + +// Encrypted ticket used for session resumption with server +func (css *ClientSessionState) SessionTicket() []uint8 { + return css.session.ticket +} + +// SSL/TLS version negotiated for the session +func (css *ClientSessionState) Vers() uint16 { + return css.session.version +} + +// Ciphersuite negotiated for the session +func (css *ClientSessionState) CipherSuite() uint16 { + return css.session.cipherSuite +} + +// MasterSecret generated by client on a full handshake +func (css *ClientSessionState) MasterSecret() []byte { + return css.session.secret +} + +func (css *ClientSessionState) EMS() bool { + return css.session.extMasterSecret +} + +// Certificate chain presented by the server +func (css *ClientSessionState) ServerCertificates() []*x509.Certificate { + return css.session.peerCertificates +} + +// Certificate chains we built for verification +func (css *ClientSessionState) VerifiedChains() [][]*x509.Certificate { + return css.session.verifiedChains +} + +func (css *ClientSessionState) SetSessionTicket(SessionTicket []uint8) { + css.session.ticket = SessionTicket +} + +func (css *ClientSessionState) SetVers(Vers uint16) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.version = Vers +} + +func (css *ClientSessionState) SetCipherSuite(CipherSuite uint16) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.cipherSuite = CipherSuite +} + +func (css *ClientSessionState) SetCreatedAt(createdAt uint64) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.createdAt = createdAt +} + +func (css *ClientSessionState) SetMasterSecret(MasterSecret []byte) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.secret = MasterSecret +} + +func (css *ClientSessionState) SetEMS(ems bool) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.extMasterSecret = ems +} + +func (css *ClientSessionState) SetServerCertificates(ServerCertificates []*x509.Certificate) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.peerCertificates = ServerCertificates +} + +func (css *ClientSessionState) SetVerifiedChains(VerifiedChains [][]*x509.Certificate) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.verifiedChains = VerifiedChains +} + +func (css *ClientSessionState) SetUseBy(useBy uint64) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.useBy = useBy +} + +func (css *ClientSessionState) SetAgeAdd(ageAdd uint32) { + if css.session == nil { + css.session = &SessionState{} + } + css.session.ageAdd = ageAdd +} + +// TicketKey is the internal representation of a session ticket key. +type TicketKey struct { + AesKey [16]byte + HmacKey [16]byte + // created is the time at which this ticket key was created. See Config.ticketKeys. + Created time.Time +} + +type TicketKeys []TicketKey +type ticketKeys []ticketKey + +func TicketKeyFromBytes(b [32]byte) TicketKey { + // [uTLS] + // empty config is required + config := &Config{} + tk := config.ticketKeyFromBytes(b) + return tk.ToPublic() +} + +func (tk ticketKey) ToPublic() TicketKey { + return TicketKey{ + AesKey: tk.aesKey, + HmacKey: tk.hmacKey, + Created: tk.created, + } +} + +func (TK TicketKey) ToPrivate() ticketKey { + return ticketKey{ + aesKey: TK.AesKey, + hmacKey: TK.HmacKey, + created: TK.Created, + } +} + +func (tks ticketKeys) ToPublic() []TicketKey { + var TKS []TicketKey + for _, ks := range tks { + TKS = append(TKS, ks.ToPublic()) + } + return TKS +} + +func (TKS TicketKeys) ToPrivate() []ticketKey { + var tks []ticketKey + for _, TK := range TKS { + tks = append(tks, TK.ToPrivate()) + } + return tks +} + +type kemPrivateKey struct { + secretKey kem.PrivateKey + curveID CurveID +} + +// Deprecated: Use KeySharePrivateKeys instead. This type is no longer used. +// Will be removed in the future. +type KemPrivateKey struct { + SecretKey kem.PrivateKey + CurveID CurveID +} + +func (kpk *KemPrivateKey) ToPrivate() *kemPrivateKey { + if kpk == nil { + return nil + } else { + return &kemPrivateKey{ + secretKey: kpk.SecretKey, + curveID: kpk.CurveID, + } + } +} + +func (kpk *kemPrivateKey) ToPublic() *KemPrivateKey { + if kpk == nil { + return nil + } else { + return &KemPrivateKey{ + SecretKey: kpk.secretKey, + CurveID: kpk.curveID, + } + } +} + +type KeySharePrivateKeys struct { + CurveID CurveID + Ecdhe *ecdh.PrivateKey + mlkem *mlkem.DecapsulationKey768 +} + +func (ksp *KeySharePrivateKeys) ToPrivate() *keySharePrivateKeys { + if ksp == nil { + return nil + } + return &keySharePrivateKeys{ + curveID: ksp.CurveID, + ecdhe: ksp.Ecdhe, + mlkem: ksp.mlkem, + } +} + +func (ksp *keySharePrivateKeys) ToPublic() *KeySharePrivateKeys { + if ksp == nil { + return nil + } + return &KeySharePrivateKeys{ + CurveID: ksp.curveID, + Ecdhe: ksp.ecdhe, + mlkem: ksp.mlkem, + } +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_quic.go b/backend/vendor/github.com/refraction-networking/utls/u_quic.go new file mode 100644 index 0000000..e985c82 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_quic.go @@ -0,0 +1,212 @@ +// Copyright 2023 The uTLS Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "context" + "errors" + "fmt" +) + +// A UQUICConn represents a connection which uses a QUIC implementation as the underlying +// transport as described in RFC 9001. +// +// Methods of UQUICConn are not safe for concurrent use. +type UQUICConn struct { + conn *UConn + + sessionTicketSent bool +} + +// QUICClient returns a new TLS client side connection using QUICTransport as the +// underlying transport. The config cannot be nil. +// +// The config's MinVersion must be at least TLS 1.3. +func UQUICClient(config *QUICConfig, clientHelloID ClientHelloID) *UQUICConn { + return newUQUICConn(UClient(nil, config.TLSConfig, clientHelloID)) +} + +func newUQUICConn(uconn *UConn) *UQUICConn { + uconn.quic = &quicState{ + signalc: make(chan struct{}), + blockedc: make(chan struct{}), + } + uconn.quic.events = uconn.quic.eventArr[:0] + return &UQUICConn{ + conn: uconn, + } +} + +// Start starts the client or server handshake protocol. +// It may produce connection events, which may be read with NextEvent. +// +// Start must be called at most once. +func (q *UQUICConn) Start(ctx context.Context) error { + if q.conn.quic.started { + return quicError(errors.New("tls: Start called more than once")) + } + q.conn.quic.started = true + if q.conn.config.MinVersion < VersionTLS13 { + return quicError(errors.New("tls: Config MinVersion must be at least TLS 1.13")) + } + go q.conn.HandshakeContext(ctx) + if _, ok := <-q.conn.quic.blockedc; !ok { + return q.conn.handshakeErr + } + return nil +} + +func (q *UQUICConn) ApplyPreset(p *ClientHelloSpec) error { + return q.conn.ApplyPreset(p) +} + +// NextEvent returns the next event occurring on the connection. +// It returns an event with a Kind of QUICNoEvent when no events are available. +func (q *UQUICConn) NextEvent() QUICEvent { + qs := q.conn.quic + if last := qs.nextEvent - 1; last >= 0 && len(qs.events[last].Data) > 0 { + // Write over some of the previous event's data, + // to catch callers erroniously retaining it. + qs.events[last].Data[0] = 0 + } + if qs.nextEvent >= len(qs.events) { + qs.events = qs.events[:0] + qs.nextEvent = 0 + return QUICEvent{Kind: QUICNoEvent} + } + e := qs.events[qs.nextEvent] + qs.events[qs.nextEvent] = QUICEvent{} // zero out references to data + qs.nextEvent++ + return e +} + +// Close closes the connection and stops any in-progress handshake. +func (q *UQUICConn) Close() error { + if q.conn.quic.cancel == nil { + return nil // never started + } + q.conn.quic.cancel() + for range q.conn.quic.blockedc { + // Wait for the handshake goroutine to return. + } + return q.conn.handshakeErr +} + +// HandleData handles handshake bytes received from the peer. +// It may produce connection events, which may be read with NextEvent. +func (q *UQUICConn) HandleData(level QUICEncryptionLevel, data []byte) error { + c := q.conn + if c.in.level != level { + return quicError(c.in.setErrorLocked(errors.New("tls: handshake data received at wrong level"))) + } + c.quic.readbuf = data + <-c.quic.signalc + _, ok := <-c.quic.blockedc + if ok { + // The handshake goroutine is waiting for more data. + return nil + } + // The handshake goroutine has exited. + c.handshakeMutex.Lock() + defer c.handshakeMutex.Unlock() + c.hand.Write(c.quic.readbuf) + c.quic.readbuf = nil + for q.conn.hand.Len() >= 4 && q.conn.handshakeErr == nil { + b := q.conn.hand.Bytes() + n := int(b[1])<<16 | int(b[2])<<8 | int(b[3]) + if n > maxHandshake { + q.conn.handshakeErr = fmt.Errorf("tls: handshake message of length %d bytes exceeds maximum of %d bytes", n, maxHandshake) + break + } + if len(b) < 4+n { + return nil + } + if err := q.conn.handlePostHandshakeMessage(); err != nil { + q.conn.handshakeErr = err + } + } + if q.conn.handshakeErr != nil { + return quicError(q.conn.handshakeErr) + } + return nil +} + +// SendSessionTicket sends a session ticket to the client. +// It produces connection events, which may be read with NextEvent. +// Currently, it can only be called once. +func (q *UQUICConn) SendSessionTicket(opts QUICSessionTicketOptions) error { + c := q.conn + if !c.isHandshakeComplete.Load() { + return quicError(errors.New("tls: SendSessionTicket called before handshake completed")) + } + if c.isClient { + return quicError(errors.New("tls: SendSessionTicket called on the client")) + } + if q.sessionTicketSent { + return quicError(errors.New("tls: SendSessionTicket called multiple times")) + } + q.sessionTicketSent = true + return quicError(c.sendSessionTicket(opts.EarlyData, opts.Extra)) +} + +// ConnectionState returns basic TLS details about the connection. +func (q *UQUICConn) ConnectionState() ConnectionState { + return q.conn.ConnectionState() +} + +// SetTransportParameters sets the transport parameters to send to the peer. +// +// Server connections may delay setting the transport parameters until after +// receiving the client's transport parameters. See QUICTransportParametersRequired. +func (q *UQUICConn) SetTransportParameters(params []byte) { + if params == nil { + params = []byte{} + } + q.conn.quic.transportParams = params // this won't be used for building ClientHello when using a preset + + // // instead, we set the transport parameters hold by the ClientHello + // for _, ext := range q.conn.Extensions { + // if qtp, ok := ext.(*QUICTransportParametersExtension); ok { + // qtp.TransportParametersExtData = params + // } + // } + + if q.conn.quic.started { + <-q.conn.quic.signalc + <-q.conn.quic.blockedc + } +} + +func (uc *UConn) QUICSetReadSecret(level QUICEncryptionLevel, suite uint16, secret []byte) { + uc.quic.events = append(uc.quic.events, QUICEvent{ + Kind: QUICSetReadSecret, + Level: level, + Suite: suite, + Data: secret, + }) +} + +func (uc *UConn) QUICSetWriteSecret(level QUICEncryptionLevel, suite uint16, secret []byte) { + uc.quic.events = append(uc.quic.events, QUICEvent{ + Kind: QUICSetWriteSecret, + Level: level, + Suite: suite, + Data: secret, + }) +} + +func (uc *UConn) QUICGetTransportParameters() ([]byte, error) { + if uc.quic.transportParams == nil { + uc.quic.events = append(uc.quic.events, QUICEvent{ + Kind: QUICTransportParametersRequired, + }) + } + for uc.quic.transportParams == nil { + if err := uc.quicWaitForSignal(); err != nil { + return nil, err + } + } + return uc.quic.transportParams, nil +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_quic_transport_parameters.go b/backend/vendor/github.com/refraction-networking/utls/u_quic_transport_parameters.go new file mode 100644 index 0000000..53b36cd --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_quic_transport_parameters.go @@ -0,0 +1,319 @@ +package tls + +import ( + "crypto/rand" + "encoding/binary" + "math" + "math/big" + + "github.com/refraction-networking/utls/internal/quicvarint" +) + +const ( + // RFC IDs + max_idle_timeout uint64 = 0x1 + max_udp_payload_size uint64 = 0x3 + initial_max_data uint64 = 0x4 + initial_max_stream_data_bidi_local uint64 = 0x5 + initial_max_stream_data_bidi_remote uint64 = 0x6 + initial_max_stream_data_uni uint64 = 0x7 + initial_max_streams_bidi uint64 = 0x8 + initial_max_streams_uni uint64 = 0x9 + max_ack_delay uint64 = 0xb + disable_active_migration uint64 = 0xc + active_connection_id_limit uint64 = 0xe + initial_source_connection_id uint64 = 0xf + version_information uint64 = 0x11 // RFC 9368 + padding uint64 = 0x15 + max_datagram_frame_size uint64 = 0x20 // RFC 9221 + grease_quic_bit uint64 = 0x2ab2 + + // Legacy IDs from draft + version_information_legacy uint64 = 0xff73db // draft-ietf-quic-version-negotiation-13 and early +) + +type TransportParameters []TransportParameter + +func (tps TransportParameters) Marshal() []byte { + var b []byte + for _, tp := range tps { + b = quicvarint.Append(b, tp.ID()) + b = quicvarint.Append(b, uint64(len(tp.Value()))) + b = append(b, tp.Value()...) + } + return b +} + +// TransportParameter represents a QUIC transport parameter. +// +// Caller will write the following to the wire: +// +// var b []byte +// b = quicvarint.Append(b, ID()) +// b = quicvarint.Append(b, len(Value())) +// b = append(b, Value()) +// +// Therefore Value() should return the exact bytes to be written to the wire AFTER the length field, +// i.e., the bytes MAY be a Variable Length Integer per RFC depending on the type of the transport +// parameter, but MUST NOT including the length field unless the parameter is defined so. +type TransportParameter interface { + ID() uint64 + Value() []byte +} + +type GREASETransportParameter struct { + IdOverride uint64 // if set to a valid GREASE ID, use this instead of randomly generated one. + Length uint16 // if len(ValueOverride) == 0, will generate random data of this size. + ValueOverride []byte // if len(ValueOverride) > 0, use this instead of random bytes. +} + +const ( + GREASE_MAX_MULTIPLIER = (0x3FFFFFFFFFFFFFFF - 27) / 31 +) + +// IsGREASEID returns true if id is a valid GREASE ID for +// transport parameters. +func (GREASETransportParameter) IsGREASEID(id uint64) bool { + return id >= 27 && (id-27)%31 == 0 +} + +// GetGREASEID returns a random valid GREASE ID for transport parameters. +func (GREASETransportParameter) GetGREASEID() uint64 { + max := big.NewInt(GREASE_MAX_MULTIPLIER) + + randMultiply, err := rand.Int(rand.Reader, max) + if err != nil { + return 27 + } + + return 27 + randMultiply.Uint64()*31 +} + +func (g *GREASETransportParameter) ID() uint64 { + if !g.IsGREASEID(g.IdOverride) { + g.IdOverride = g.GetGREASEID() + } + return g.IdOverride +} + +func (g *GREASETransportParameter) Value() []byte { + if len(g.ValueOverride) == 0 { + g.ValueOverride = make([]byte, g.Length) + rand.Read(g.ValueOverride) + } + return g.ValueOverride +} + +type MaxIdleTimeout uint64 // in milliseconds + +func (MaxIdleTimeout) ID() uint64 { + return max_idle_timeout +} + +func (m MaxIdleTimeout) Value() []byte { + return quicvarint.Append([]byte{}, uint64(m)) +} + +type MaxUDPPayloadSize uint64 + +func (MaxUDPPayloadSize) ID() uint64 { + return max_udp_payload_size +} + +func (m MaxUDPPayloadSize) Value() []byte { + return quicvarint.Append([]byte{}, uint64(m)) +} + +type InitialMaxData uint64 + +func (InitialMaxData) ID() uint64 { + return initial_max_data +} + +func (i InitialMaxData) Value() []byte { + return quicvarint.Append([]byte{}, uint64(i)) +} + +type InitialMaxStreamDataBidiLocal uint64 + +func (InitialMaxStreamDataBidiLocal) ID() uint64 { + return initial_max_stream_data_bidi_local +} + +func (i InitialMaxStreamDataBidiLocal) Value() []byte { + return quicvarint.Append([]byte{}, uint64(i)) +} + +type InitialMaxStreamDataBidiRemote uint64 + +func (InitialMaxStreamDataBidiRemote) ID() uint64 { + return initial_max_stream_data_bidi_remote +} + +func (i InitialMaxStreamDataBidiRemote) Value() []byte { + return quicvarint.Append([]byte{}, uint64(i)) +} + +type InitialMaxStreamDataUni uint64 + +func (InitialMaxStreamDataUni) ID() uint64 { + return initial_max_stream_data_uni +} + +func (i InitialMaxStreamDataUni) Value() []byte { + return quicvarint.Append([]byte{}, uint64(i)) +} + +type InitialMaxStreamsBidi uint64 + +func (InitialMaxStreamsBidi) ID() uint64 { + return initial_max_streams_bidi +} + +func (i InitialMaxStreamsBidi) Value() []byte { + return quicvarint.Append([]byte{}, uint64(i)) +} + +type InitialMaxStreamsUni uint64 + +func (InitialMaxStreamsUni) ID() uint64 { + return initial_max_streams_uni +} + +func (i InitialMaxStreamsUni) Value() []byte { + return quicvarint.Append([]byte{}, uint64(i)) +} + +type MaxAckDelay uint64 + +func (MaxAckDelay) ID() uint64 { + return max_ack_delay +} + +func (m MaxAckDelay) Value() []byte { + return quicvarint.Append([]byte{}, uint64(m)) +} + +type DisableActiveMigration struct{} + +func (*DisableActiveMigration) ID() uint64 { + return disable_active_migration +} + +// Its Value MUST ALWAYS be empty. +func (*DisableActiveMigration) Value() []byte { + return []byte{} +} + +type ActiveConnectionIDLimit uint64 + +func (ActiveConnectionIDLimit) ID() uint64 { + return active_connection_id_limit +} + +func (a ActiveConnectionIDLimit) Value() []byte { + return quicvarint.Append([]byte{}, uint64(a)) +} + +type InitialSourceConnectionID []byte // if empty, will be set to the Connection ID used for the Initial packet. + +func (InitialSourceConnectionID) ID() uint64 { + return initial_source_connection_id +} + +func (i InitialSourceConnectionID) Value() []byte { + return []byte(i) +} + +type VersionInformation struct { + ChoosenVersion uint32 + AvailableVersions []uint32 // Also known as "Other Versions" in early drafts. + + LegacyID bool // If true, use the legacy-assigned ID (0xff73db) instead of the RFC-assigned one (0x11). +} + +const ( + VERSION_NEGOTIATION uint32 = 0x00000000 // rfc9000 + VERSION_1 uint32 = 0x00000001 // rfc9000 + VERSION_2 uint32 = 0x6b3343cf // rfc9369 + + VERSION_GREASE uint32 = 0x0a0a0a0a // -> 0x?a?a?a?a +) + +func (v *VersionInformation) ID() uint64 { + if v.LegacyID { + return version_information_legacy + } + return version_information +} + +func (v *VersionInformation) Value() []byte { + var b []byte + b = binary.BigEndian.AppendUint32(b, v.ChoosenVersion) + for _, version := range v.AvailableVersions { + if version != VERSION_GREASE { + b = binary.BigEndian.AppendUint32(b, version) + } else { + b = binary.BigEndian.AppendUint32(b, v.GetGREASEVersion()) + } + } + return b +} + +func (*VersionInformation) GetGREASEVersion() uint32 { + // get a random uint32 + max := big.NewInt(math.MaxUint32) + randVal, err := rand.Int(rand.Reader, max) + if err != nil { + return VERSION_GREASE + } + + return uint32(randVal.Uint64()&math.MaxUint32) | 0x0a0a0a0a // all GREASE versions are in 0x?a?a?a?a +} + +type PaddingTransportParameter []byte + +func (PaddingTransportParameter) ID() uint64 { + return padding +} + +func (p PaddingTransportParameter) Value() []byte { + return p +} + +type MaxDatagramFrameSize uint64 + +func (MaxDatagramFrameSize) ID() uint64 { + return max_datagram_frame_size +} + +func (m MaxDatagramFrameSize) Value() []byte { + return quicvarint.Append([]byte{}, uint64(m)) +} + +type GREASEQUICBit struct{} + +func (*GREASEQUICBit) ID() uint64 { + return grease_quic_bit +} + +// Its Value MUST ALWAYS be empty. +func (*GREASEQUICBit) Value() []byte { + return []byte{} +} + +type FakeQUICTransportParameter struct { + Id uint64 + Val []byte +} + +func (f *FakeQUICTransportParameter) ID() uint64 { + if f.Id == 0 { + panic("it is not allowed to use a FakeQUICTransportParameter without setting the ID") + } + return f.Id +} + +func (f *FakeQUICTransportParameter) Value() []byte { + return f.Val +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_roller.go b/backend/vendor/github.com/refraction-networking/utls/u_roller.go new file mode 100644 index 0000000..a1c5291 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_roller.go @@ -0,0 +1,100 @@ +package tls + +import ( + "net" + "sync" + "time" +) + +type Roller struct { + HelloIDs []ClientHelloID + HelloIDMu sync.Mutex + WorkingHelloID *ClientHelloID + TcpDialTimeout time.Duration + TlsHandshakeTimeout time.Duration + r *prng +} + +// NewRoller creates Roller object with default range of HelloIDs to cycle through until a +// working/unblocked one is found. +func NewRoller() (*Roller, error) { + r, err := newPRNG() + if err != nil { + return nil, err + } + + tcpDialTimeoutInc := r.Intn(14) + tcpDialTimeoutInc = 7 + tcpDialTimeoutInc + + tlsHandshakeTimeoutInc := r.Intn(20) + tlsHandshakeTimeoutInc = 11 + tlsHandshakeTimeoutInc + + return &Roller{ + HelloIDs: []ClientHelloID{ + HelloChrome_Auto, + HelloFirefox_Auto, + HelloIOS_Auto, + HelloRandomized, + }, + TcpDialTimeout: time.Second * time.Duration(tcpDialTimeoutInc), + TlsHandshakeTimeout: time.Second * time.Duration(tlsHandshakeTimeoutInc), + r: r, + }, nil +} + +// Dial attempts to establish connection to given address using different HelloIDs. +// If a working HelloID is found, it is used again for subsequent Dials. +// If tcp connection fails or all HelloIDs are tried, returns with last error. +// +// Usage examples: +// Dial("tcp4", "google.com:443", "google.com") +// Dial("tcp", "10.23.144.22:443", "mywebserver.org") +func (c *Roller) Dial(network, addr, serverName string) (*UConn, error) { + helloIDs := make([]ClientHelloID, len(c.HelloIDs)) + copy(helloIDs, c.HelloIDs) + c.r.rand.Shuffle(len(c.HelloIDs), func(i, j int) { + helloIDs[i], helloIDs[j] = helloIDs[j], helloIDs[i] + }) + + c.HelloIDMu.Lock() + workingHelloId := c.WorkingHelloID // keep using same helloID, if it works + c.HelloIDMu.Unlock() + if workingHelloId != nil { + helloIDFound := false + for i, ID := range helloIDs { + if ID == *workingHelloId { + helloIDs[i] = helloIDs[0] + helloIDs[0] = *workingHelloId // push working hello ID first + helloIDFound = true + break + } + } + if !helloIDFound { + helloIDs = append([]ClientHelloID{*workingHelloId}, helloIDs...) + } + } + + var tcpConn net.Conn + var err error + for _, helloID := range helloIDs { + tcpConn, err = net.DialTimeout(network, addr, c.TcpDialTimeout) + if err != nil { + return nil, err // on tcp Dial failure return with error right away + } + + client := UClient(tcpConn, nil, helloID) + client.SetSNI(serverName) + client.SetDeadline(time.Now().Add(c.TlsHandshakeTimeout)) + err = client.Handshake() + client.SetDeadline(time.Time{}) // unset timeout + if err != nil { + continue // on tls Dial error keep trying HelloIDs + } + + c.HelloIDMu.Lock() + c.WorkingHelloID = &client.ClientHelloID + c.HelloIDMu.Unlock() + return client, err + } + return nil, err +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_session_controller.go b/backend/vendor/github.com/refraction-networking/utls/u_session_controller.go new file mode 100644 index 0000000..1ba87b8 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_session_controller.go @@ -0,0 +1,361 @@ +package tls + +import ( + "errors" + "fmt" + + "github.com/refraction-networking/utls/internal/tls13" +) + +// Tracking the state of calling conn.loadSession +type LoadSessionTrackerState int + +const NeverCalled LoadSessionTrackerState = 0 +const UtlsAboutToCall LoadSessionTrackerState = 1 +const CalledByULoadSession LoadSessionTrackerState = 2 +const CalledByGoTLS LoadSessionTrackerState = 3 + +// The state of the session controller +type sessionControllerState int + +const NoSession sessionControllerState = 0 +const SessionTicketExtInitialized sessionControllerState = 1 +const SessionTicketExtAllSet sessionControllerState = 2 +const PskExtInitialized sessionControllerState = 3 +const PskExtAllSet sessionControllerState = 4 + +// sessionController is responsible for managing and controlling all session related states. It manages the lifecycle of the session ticket extension and the psk extension, including initialization, removal if the client hello spec doesn't contain any of them, and setting the prepared state to the client hello. +// +// Users should never directly modify the underlying state. Violations will result in undefined behaviors. +// +// Users should never construct sessionController by themselves, use the function `newSessionController` instead. +type sessionController struct { + // sessionTicketExt logically owns the session ticket extension + sessionTicketExt ISessionTicketExtension + + // pskExtension logically owns the psk extension + pskExtension PreSharedKeyExtension + + // uconnRef is a reference to the uconn + uconnRef *UConn + + // state represents the internal state of the sessionController. Users are advised to modify the state only through designated methods and avoid direct manipulation, as doing so may result in undefined behavior. + state sessionControllerState + + // loadSessionTracker keeps track of how the conn.loadSession method is being utilized. + loadSessionTracker LoadSessionTrackerState + + // callingLoadSession is a boolean flag that indicates whether the `conn.loadSession` function is currently being invoked. + callingLoadSession bool + + // locked is a boolean flag that becomes true once all states are appropriately set. Once `locked` is true, further modifications are disallowed, except for the binders. + locked bool +} + +// newSessionController constructs a new SessionController +func newSessionController(uconn *UConn) *sessionController { + return &sessionController{ + uconnRef: uconn, + sessionTicketExt: nil, + pskExtension: nil, + state: NoSession, + locked: false, + callingLoadSession: false, + loadSessionTracker: NeverCalled, + } +} + +func (s *sessionController) isSessionLocked() bool { + return s.locked +} + +type shouldLoadSessionResult int + +const shouldReturn shouldLoadSessionResult = 0 +const shouldSetTicket shouldLoadSessionResult = 1 +const shouldSetPsk shouldLoadSessionResult = 2 +const shouldLoad shouldLoadSessionResult = 3 + +// shouldLoadSession determines the appropriate action to take when it is time to load the session for the clientHello. +// There are several possible scenarios: +// - If a session ticket is already initialized, typically via the `initSessionTicketExt()` function, the ticket should be set in the client hello. +// - If a pre-shared key (PSK) is already initialized, typically via the `overridePskExt()` function, the PSK should be set in the client hello. +// - If both the `sessionTicketExt` and `pskExtension` are nil, which might occur if the client hello spec does not include them, we should skip the loadSession(). +// - In all other cases, the function proceeds to load the session. +func (s *sessionController) shouldLoadSession() shouldLoadSessionResult { + if s.sessionTicketExt == nil && s.pskExtension == nil || s.uconnRef.clientHelloBuildStatus != NotBuilt { + // No need to load session since we don't have the related extensions. + return shouldReturn + } + if s.state == SessionTicketExtInitialized { + return shouldSetTicket + } + if s.state == PskExtInitialized { + return shouldSetPsk + } + return shouldLoad +} + +// utlsAboutToLoadSession updates the loadSessionTracker to `UtlsAboutToCall` to signal the initiation of a session loading operation, +// provided that the preconditions are met. If the preconditions are not met (due to incorrect utls implementation), this function triggers a panic. +func (s *sessionController) utlsAboutToLoadSession() { + uAssert(s.state == NoSession && !s.locked, "tls: aboutToLoadSession failed: must only load session when the session of the client hello is not locked and when there's currently no session") + s.loadSessionTracker = UtlsAboutToCall +} + +func (s *sessionController) assertHelloNotBuilt(caller string) { + if s.uconnRef.clientHelloBuildStatus != NotBuilt { + panic(fmt.Sprintf("tls: %s failed: we can't modify the session after the clientHello is built", caller)) + } +} + +func (s *sessionController) assertControllerState(caller string, desired sessionControllerState, moreDesiredStates ...sessionControllerState) { + if s.state != desired && !anyTrue(moreDesiredStates, func(_ int, state *sessionControllerState) bool { + return s.state == *state + }) { + panic(fmt.Sprintf("tls: %s failed: undesired controller state %d", caller, s.state)) + } +} + +func (s *sessionController) assertNotLocked(caller string) { + if s.locked { + panic(fmt.Sprintf("tls: %s failed: you must not modify the session after it's locked", caller)) + } +} + +func (s *sessionController) assertCanSkip(caller, extensionName string) { + if !s.uconnRef.skipResumptionOnNilExtension { + panic(fmt.Sprintf("tls: %s failed: session resumption is enabled, but there is no %s in the ClientHelloSpec; Please consider provide one in the ClientHelloSpec; If this is intentional, you may consider disable resumption by setting Config.SessionTicketsDisabled to true, or set Config.PreferSkipResumptionOnNilExtension to true to suppress this exception", caller, extensionName)) + } +} + +// finalCheck performs a comprehensive check on the updated state to ensure the correctness of the changes. +// If the checks pass successfully, the sessionController's state will be locked. +// Any failure in passing the tests indicates incorrect implementations in the utls, which will result in triggering a panic. +// Refer to the documentation for the `locked` field for more detailed information. +func (s *sessionController) finalCheck() { + s.assertControllerState("SessionController.finalCheck", PskExtAllSet, SessionTicketExtAllSet, NoSession) + s.locked = true +} + +func initializationGuard[E Initializable, I func(E)](extension E, initializer I) { + uAssert(!extension.IsInitialized(), "tls: initialization failed: the extension is already initialized") + initializer(extension) + uAssert(extension.IsInitialized(), "tls: initialization failed: the extension is not initialized after initialization") +} + +// initSessionTicketExt initializes the ticket and sets the state to `TicketInitialized`. +func (s *sessionController) initSessionTicketExt(session *SessionState, ticket []byte) { + s.assertNotLocked("initSessionTicketExt") + s.assertHelloNotBuilt("initSessionTicketExt") + s.assertControllerState("initSessionTicketExt", NoSession) + panicOnNil("initSessionTicketExt", session, ticket) + if s.sessionTicketExt == nil { + s.assertCanSkip("initSessionTicketExt", "session ticket extension") + return + } + initializationGuard(s.sessionTicketExt, func(e ISessionTicketExtension) { + s.sessionTicketExt.InitializeByUtls(session, ticket) + }) + s.state = SessionTicketExtInitialized +} + +// initPSK initializes the PSK extension using a valid session. The PSK extension +// should not be initialized previously, and the parameters must not be nil; +// otherwise, this function will trigger a panic. +func (s *sessionController) initPskExt(session *SessionState, earlySecret *tls13.EarlySecret, binderKey []byte, pskIdentities []pskIdentity) { + s.assertNotLocked("initPskExt") + s.assertHelloNotBuilt("initPskExt") + s.assertControllerState("initPskExt", NoSession) + panicOnNil("initPskExt", session, earlySecret, pskIdentities) + if s.pskExtension == nil { + s.assertCanSkip("initPskExt", "pre-shared key extension") + return + } + initializationGuard(s.pskExtension, func(e PreSharedKeyExtension) { + publicPskIdentities := mapSlice(pskIdentities, func(private pskIdentity) PskIdentity { + return PskIdentity{ + Label: private.label, + ObfuscatedTicketAge: private.obfuscatedTicketAge, + } + }) + e.InitializeByUtls(session, earlySecret.Secret(), binderKey, publicPskIdentities) + }) + + s.state = PskExtInitialized +} + +// setSessionTicketToUConn write the ticket states from the session ticket extension to the client hello and handshake state. +func (s *sessionController) setSessionTicketToUConn() { + uAssert(s.sessionTicketExt != nil && s.state == SessionTicketExtInitialized, "tls: setSessionTicketExt failed: invalid state") + s.uconnRef.HandshakeState.Session = s.sessionTicketExt.GetSession() + s.uconnRef.HandshakeState.Hello.SessionTicket = s.sessionTicketExt.GetTicket() + s.state = SessionTicketExtAllSet +} + +// setPskToUConn sets the psk to the handshake state and client hello. +func (s *sessionController) setPskToUConn() { + uAssert(s.pskExtension != nil && (s.state == PskExtInitialized || s.state == PskExtAllSet), "tls: setPskToUConn failed: invalid state") + pskCommon := s.pskExtension.GetPreSharedKeyCommon() + if s.state == PskExtInitialized { + s.uconnRef.HandshakeState.State13.EarlySecret = pskCommon.EarlySecret + s.uconnRef.HandshakeState.Session = pskCommon.Session + s.uconnRef.HandshakeState.Hello.PskIdentities = pskCommon.Identities + s.uconnRef.HandshakeState.Hello.PskBinders = pskCommon.Binders + } else if s.state == PskExtAllSet { + uAssert(s.uconnRef.HandshakeState.Session == pskCommon.Session && sliceEq(s.uconnRef.HandshakeState.State13.EarlySecret, pskCommon.EarlySecret) && + allTrue(s.uconnRef.HandshakeState.Hello.PskIdentities, func(i int, psk *PskIdentity) bool { + return pskCommon.Identities[i].ObfuscatedTicketAge == psk.ObfuscatedTicketAge && sliceEq(pskCommon.Identities[i].Label, psk.Label) + }), "tls: setPskToUConn failed: only binders are allowed to change on state `PskAllSet`") + } + s.uconnRef.HandshakeState.State13.BinderKey = pskCommon.BinderKey + s.state = PskExtAllSet +} + +// shouldUpdateBinders determines whether binders should be updated based on the presence of an initialized psk extension. +// This function returns true if an initialized psk extension exists. Binders are allowed to be updated when the state is `PskAllSet`, +// as the `BuildHandshakeState` function can be called multiple times in this case. However, it's important to note that +// the session state, apart from binders, should not be altered more than once. +func (s *sessionController) shouldUpdateBinders() bool { + if s.pskExtension == nil { + return false + } + return (s.state == PskExtInitialized || s.state == PskExtAllSet) +} + +func (s *sessionController) updateBinders() { + uAssert(s.shouldUpdateBinders(), "tls: updateBinders failed: shouldn't update binders") + s.pskExtension.PatchBuiltHello(s.uconnRef.HandshakeState.Hello) +} + +func (s *sessionController) overrideExtension(extension Initializable, override func(), initializedState sessionControllerState) error { + panicOnNil("overrideExtension", extension) + s.assertNotLocked("overrideExtension") + s.assertControllerState("overrideExtension", NoSession) + override() + if extension.IsInitialized() { + s.state = initializedState + } + return nil +} + +// overridePskExt allows the user of utls to customize the psk extension. +func (s *sessionController) overridePskExt(pskExt PreSharedKeyExtension) error { + return s.overrideExtension(pskExt, func() { s.pskExtension = pskExt }, PskExtInitialized) +} + +// overridePskExt allows the user of utls to customize the session ticket extension. +func (s *sessionController) overrideSessionTicketExt(sessionTicketExt ISessionTicketExtension) error { + return s.overrideExtension(sessionTicketExt, func() { s.sessionTicketExt = sessionTicketExt }, SessionTicketExtInitialized) +} + +// syncSessionExts synchronizes the sessionController with the session-related +// extensions from the extension list after applying client hello specs. +// +// - If the extension list is missing the session ticket extension or PSK +// extension, owned extensions are dropped and states are reset. +// - If the user provides a session ticket extension or PSK extension, the +// corresponding extension from the extension list will be replaced. +// - If the user doesn't provide session-related extensions, the extensions +// from the extension list will be utilized. +// +// This function ensures that there is only one session ticket extension or PSK +// extension, and that the PSK extension is the last extension in the extension +// list. +func (s *sessionController) syncSessionExts() error { + uAssert(s.uconnRef.clientHelloBuildStatus == NotBuilt, "tls: checkSessionExts failed: we can't modify the session after the clientHello is built") + s.assertNotLocked("checkSessionExts") + s.assertHelloNotBuilt("checkSessionExts") + s.assertControllerState("checkSessionExts", NoSession, SessionTicketExtInitialized, PskExtInitialized) + numSessionExt := 0 + hasPskExt := false + for i, e := range s.uconnRef.Extensions { + switch ext := e.(type) { + case ISessionTicketExtension: + uAssert(numSessionExt == 0, "tls: checkSessionExts failed: multiple ISessionTicketExtensions in the extension list") + if s.sessionTicketExt == nil { + // If there isn't a user-provided session ticket extension, use the one from the spec + s.sessionTicketExt = ext + } else { + // Otherwise, replace the one in the extension list with the user-provided one + s.uconnRef.Extensions[i] = s.sessionTicketExt + } + numSessionExt += 1 + case PreSharedKeyExtension: + uAssert(i == len(s.uconnRef.Extensions)-1, "tls: checkSessionExts failed: PreSharedKeyExtension must be the last extension") + if s.pskExtension == nil { + // If there isn't a user-provided psk extension, use the one from the spec + s.pskExtension = ext + } else { + // Otherwise, replace the one in the extension list with the user-provided one + s.uconnRef.Extensions[i] = s.pskExtension + } + s.pskExtension.SetOmitEmptyPsk(s.uconnRef.config.OmitEmptyPsk) + hasPskExt = true + } + } + if numSessionExt == 0 { + if s.state == SessionTicketExtInitialized { + return errors.New("tls: checkSessionExts failed: the user provided a session ticket, but the specification doesn't contain one") + } + s.sessionTicketExt = nil + s.uconnRef.HandshakeState.Session = nil + s.uconnRef.HandshakeState.Hello.SessionTicket = nil + } + if !hasPskExt { + if s.state == PskExtInitialized { + return errors.New("tls: checkSessionExts failed: the user provided a psk, but the specification doesn't contain one") + } + s.pskExtension = nil + s.uconnRef.HandshakeState.State13.BinderKey = nil + s.uconnRef.HandshakeState.State13.EarlySecret = nil + s.uconnRef.HandshakeState.Session = nil + s.uconnRef.HandshakeState.Hello.PskIdentities = nil + } + return nil +} + +// onEnterLoadSessionCheck is intended to be invoked upon entering the `conn.loadSession` function. +// It is designed to ensure the correctness of the utls implementation. If the utls implementation is found to be incorrect, this function will trigger a panic. +func (s *sessionController) onEnterLoadSessionCheck() { + uAssert(!s.locked, "tls: LoadSessionCoordinator.onEnterLoadSessionCheck failed: session is set and locked, no call to loadSession is allowed") + switch s.loadSessionTracker { + case UtlsAboutToCall, NeverCalled: + s.callingLoadSession = true + case CalledByULoadSession, CalledByGoTLS: + panic("tls: LoadSessionCoordinator.onEnterLoadSessionCheck failed: you must not call loadSession() twice") + default: + panic("tls: LoadSessionCoordinator.onEnterLoadSessionCheck failed: unimplemented state") + } +} + +// onLoadSessionReturn is intended to be invoked upon returning from the `conn.loadSession` function. +// It serves as a validation step for the correctness of the underlying utls implementation. +// If the utls implementation is incorrect, this function will trigger a panic. +func (s *sessionController) onLoadSessionReturn() { + uAssert(s.callingLoadSession, "tls: LoadSessionCoordinator.onLoadSessionReturn failed: it's not loading sessions, perhaps this function is not being called by loadSession.") + switch s.loadSessionTracker { + case NeverCalled: + s.loadSessionTracker = CalledByGoTLS + case UtlsAboutToCall: + s.loadSessionTracker = CalledByULoadSession + default: + panic("tls: LoadSessionCoordinator.onLoadSessionReturn failed: unimplemented state") + } + s.callingLoadSession = false +} + +// shouldLoadSessionWriteBinders checks if `conn.loadSession` should proceed to write binders and marshal the client hello. If the utls implementation +// is incorrect, this function will trigger a panic. +func (s *sessionController) shouldLoadSessionWriteBinders() bool { + uAssert(s.callingLoadSession, "tls: shouldWriteBinders failed: LoadSessionCoordinator isn't loading sessions, perhaps this function is not being called by loadSession.") + + switch s.loadSessionTracker { + case NeverCalled: + return true + case UtlsAboutToCall: + return false + default: + panic("tls: shouldWriteBinders failed: unimplemented state") + } +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_session_ticket.go b/backend/vendor/github.com/refraction-networking/utls/u_session_ticket.go new file mode 100644 index 0000000..caefd06 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_session_ticket.go @@ -0,0 +1,82 @@ +package tls + +import "io" + +type ISessionTicketExtension interface { + TLSExtension + + // If false is returned, utls will invoke `InitializeByUtls()` for the necessary initialization. + Initializable + + // InitializeByUtls is invoked when IsInitialized() returns false. + // It initializes the extension using a real and valid TLS 1.2 session. + InitializeByUtls(session *SessionState, ticket []byte) + + GetSession() *SessionState + + GetTicket() []byte +} + +// SessionTicketExtension implements session_ticket (35) +type SessionTicketExtension struct { + Session *SessionState + Ticket []byte + Initialized bool +} + +func (e *SessionTicketExtension) writeToUConn(uc *UConn) error { + // session states are handled later. At this point tickets aren't + // being loaded by utls, so don't write anything to the UConn. + uc.HandshakeState.Hello.TicketSupported = true // This doesn't really matter, this field is only used to add session ticket ext in go tls. + return nil +} + +func (e *SessionTicketExtension) Len() int { + return 4 + len(e.Ticket) +} + +func (e *SessionTicketExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + extBodyLen := e.Len() - 4 + + b[0] = byte(extensionSessionTicket >> 8) + b[1] = byte(extensionSessionTicket) + b[2] = byte(extBodyLen >> 8) + b[3] = byte(extBodyLen) + if extBodyLen > 0 { + copy(b[4:], e.Ticket) + } + return e.Len(), io.EOF +} + +func (e *SessionTicketExtension) IsInitialized() bool { + return e.Initialized +} + +func (e *SessionTicketExtension) InitializeByUtls(session *SessionState, ticket []byte) { + uAssert(!e.Initialized, "tls: InitializeByUtls failed: the SessionTicketExtension is initialized") + uAssert(session.version == VersionTLS12 && session != nil && ticket != nil, "tls: InitializeByUtls failed: the session is not a tls 1.2 session") + e.Session = session + e.Ticket = ticket + e.Initialized = true +} + +func (e *SessionTicketExtension) UnmarshalJSON(_ []byte) error { + return nil // no-op +} + +func (e *SessionTicketExtension) Write(_ []byte) (int, error) { + // RFC 5077, Section 3.2 + return 0, nil +} + +func (e *SessionTicketExtension) GetSession() *SessionState { + return e.Session +} + +func (e *SessionTicketExtension) GetTicket() []byte { + return e.Ticket +} diff --git a/backend/vendor/github.com/refraction-networking/utls/u_tls_extensions.go b/backend/vendor/github.com/refraction-networking/utls/u_tls_extensions.go new file mode 100644 index 0000000..5b3a5b4 --- /dev/null +++ b/backend/vendor/github.com/refraction-networking/utls/u_tls_extensions.go @@ -0,0 +1,1861 @@ +// Copyright 2017 Google Inc. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package tls + +import ( + "encoding/json" + "errors" + "fmt" + "io" + "strings" + + "github.com/refraction-networking/utls/dicttls" + "golang.org/x/crypto/cryptobyte" +) + +// ExtensionFromID returns a TLSExtension for the given extension ID. +func ExtensionFromID(id uint16) TLSExtension { + // deep copy + switch id { + case extensionServerName: + return &SNIExtension{} + case extensionStatusRequest: + return &StatusRequestExtension{} + case extensionSupportedCurves: + return &SupportedCurvesExtension{} + case extensionSupportedPoints: + return &SupportedPointsExtension{} + case extensionSignatureAlgorithms: + return &SignatureAlgorithmsExtension{} + case extensionALPN: + return &ALPNExtension{} + case extensionStatusRequestV2: + return &StatusRequestV2Extension{} + case extensionSCT: + return &SCTExtension{} + case utlsExtensionPadding: + return &UtlsPaddingExtension{} + case extensionExtendedMasterSecret: + return &ExtendedMasterSecretExtension{} + case fakeExtensionTokenBinding: + return &FakeTokenBindingExtension{} + case utlsExtensionCompressCertificate: + return &UtlsCompressCertExtension{} + case fakeRecordSizeLimit: + return &FakeRecordSizeLimitExtension{} + case fakeExtensionDelegatedCredentials: + return &FakeDelegatedCredentialsExtension{} + case extensionSessionTicket: + return &SessionTicketExtension{} + case extensionPreSharedKey: + return (PreSharedKeyExtension)(&FakePreSharedKeyExtension{}) // To use the result, caller needs further inspection to decide between Fake or Utls. + // case extensionEarlyData: + // return &EarlyDataExtension{} + case extensionSupportedVersions: + return &SupportedVersionsExtension{} + // case extensionCookie: + // return &CookieExtension{} + case extensionPSKModes: + return &PSKKeyExchangeModesExtension{} + // case extensionCertificateAuthorities: + // return &CertificateAuthoritiesExtension{} + case extensionSignatureAlgorithmsCert: + return &SignatureAlgorithmsCertExtension{} + case extensionKeyShare: + return &KeyShareExtension{} + case extensionQUICTransportParameters: + return &QUICTransportParametersExtension{} + case extensionNextProtoNeg: + return &NPNExtension{} + case utlsExtensionApplicationSettings: + return &ApplicationSettingsExtension{} + case fakeOldExtensionChannelID: + return &FakeChannelIDExtension{true} + case fakeExtensionChannelID: + return &FakeChannelIDExtension{} + case utlsExtensionECH: + return &GREASEEncryptedClientHelloExtension{} + case extensionRenegotiationInfo: + return &RenegotiationInfoExtension{} + default: + if isGREASEUint16(id) { + return &UtlsGREASEExtension{} + } + return nil // not returning GenericExtension, it should be handled by caller + } +} + +type TLSExtension interface { + writeToUConn(*UConn) error + + Len() int // includes header + + // Read reads up to len(p) bytes into p. + // It returns the number of bytes read (0 <= n <= len(p)) and any error encountered. + Read(p []byte) (n int, err error) // implements io.Reader +} + +// TLSExtensionWriter is an interface allowing a TLS extension to be +// auto-constucted/recovered by reading in a byte stream. +type TLSExtensionWriter interface { + TLSExtension + + // Write writes the extension data as a byte slice, up to len(b) bytes from b. + // It returns the number of bytes written (0 <= n <= len(b)) and any error encountered. + // + // The implementation MUST NOT silently drop data if consumed less than len(b) bytes, + // instead, it MUST return an error. + Write(b []byte) (n int, err error) +} + +type TLSExtensionJSON interface { + TLSExtension + + // UnmarshalJSON unmarshals the JSON-encoded data into the extension. + UnmarshalJSON([]byte) error +} + +// SNIExtension implements server_name (0) +type SNIExtension struct { + ServerName string // not an array because go crypto/tls doesn't support multiple SNIs +} + +func (e *SNIExtension) Len() int { + // Literal IP addresses, absolute FQDNs, and empty strings are not permitted as SNI values. + // See RFC 6066, Section 3. + hostName := hostnameInSNI(e.ServerName) + if len(hostName) == 0 { + return 0 + } + return 4 + 2 + 1 + 2 + len(hostName) +} + +func (e *SNIExtension) Read(b []byte) (int, error) { + // Literal IP addresses, absolute FQDNs, and empty strings are not permitted as SNI values. + // See RFC 6066, Section 3. + hostName := hostnameInSNI(e.ServerName) + if len(hostName) == 0 { + return 0, io.EOF + } + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // RFC 3546, section 3.1 + b[0] = byte(extensionServerName >> 8) + b[1] = byte(extensionServerName) + b[2] = byte((len(hostName) + 5) >> 8) + b[3] = byte(len(hostName) + 5) + b[4] = byte((len(hostName) + 3) >> 8) + b[5] = byte(len(hostName) + 3) + // b[6] Server Name Type: host_name (0) + b[7] = byte(len(hostName) >> 8) + b[8] = byte(len(hostName)) + copy(b[9:], []byte(hostName)) + return e.Len(), io.EOF +} + +func (e *SNIExtension) UnmarshalJSON(_ []byte) error { + return nil // no-op +} + +// Write is a no-op for StatusRequestExtension. +// SNI should not be fingerprinted and is user controlled. +func (e *SNIExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 6066, Section 3 + var nameList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&nameList) || nameList.Empty() { + return fullLen, errors.New("unable to read server name extension data") + } + var serverName string + for !nameList.Empty() { + var nameType uint8 + var serverNameBytes cryptobyte.String + if !nameList.ReadUint8(&nameType) || + !nameList.ReadUint16LengthPrefixed(&serverNameBytes) || + serverNameBytes.Empty() { + return fullLen, errors.New("unable to read server name extension data") + } + if nameType != 0 { + continue + } + if len(serverName) != 0 { + return fullLen, errors.New("multiple names of the same name_type in server name extension are prohibited") + } + serverName = string(serverNameBytes) + if strings.HasSuffix(serverName, ".") { + return fullLen, errors.New("SNI value may not include a trailing dot") + } + } + // clientHelloSpec.Extensions = append(clientHelloSpec.Extensions, &SNIExtension{}) // gaukas moved this line out from the loop. + + // don't copy SNI from ClientHello to ClientHelloSpec! + return fullLen, nil +} + +func (e *SNIExtension) writeToUConn(uc *UConn) error { + uc.config.ServerName = e.ServerName + hostName := hostnameInSNI(e.ServerName) + uc.HandshakeState.Hello.ServerName = hostName + + return nil +} + +// StatusRequestExtension implements status_request (5) +type StatusRequestExtension struct { +} + +func (e *StatusRequestExtension) Len() int { + return 9 +} + +func (e *StatusRequestExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // RFC 4366, section 3.6 + b[0] = byte(extensionStatusRequest >> 8) + b[1] = byte(extensionStatusRequest) + b[2] = 0 + b[3] = 5 + b[4] = 1 // OCSP type + // Two zero valued uint16s for the two lengths. + return e.Len(), io.EOF +} + +func (e *StatusRequestExtension) UnmarshalJSON(_ []byte) error { + return nil // no-op +} + +// Write is a no-op for StatusRequestExtension. No data for this extension. +func (e *StatusRequestExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 4366, Section 3.6 + var statusType uint8 + var ignored cryptobyte.String + if !extData.ReadUint8(&statusType) || + !extData.ReadUint16LengthPrefixed(&ignored) || + !extData.ReadUint16LengthPrefixed(&ignored) { + return fullLen, errors.New("unable to read status request extension data") + } + + if statusType != statusTypeOCSP { + return fullLen, errors.New("status request extension statusType is not statusTypeOCSP(1)") + } + + return fullLen, nil +} + +func (e *StatusRequestExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.OcspStapling = true + return nil +} + +// SupportedCurvesExtension implements supported_groups (renamed from "elliptic_curves") (10) +type SupportedCurvesExtension struct { + Curves []CurveID +} + +func (e *SupportedCurvesExtension) Len() int { + return 6 + 2*len(e.Curves) +} + +func (e *SupportedCurvesExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // http://tools.ietf.org/html/rfc4492#section-5.5.1 + b[0] = byte(extensionSupportedCurves >> 8) + b[1] = byte(extensionSupportedCurves) + b[2] = byte((2 + 2*len(e.Curves)) >> 8) + b[3] = byte(2 + 2*len(e.Curves)) + b[4] = byte((2 * len(e.Curves)) >> 8) + b[5] = byte(2 * len(e.Curves)) + for i, curve := range e.Curves { + b[6+2*i] = byte(curve >> 8) + b[7+2*i] = byte(curve) + } + return e.Len(), io.EOF +} + +func (e *SupportedCurvesExtension) UnmarshalJSON(data []byte) error { + var namedGroups struct { + NamedGroupList []string `json:"named_group_list"` + } + if err := json.Unmarshal(data, &namedGroups); err != nil { + return err + } + + for _, namedGroup := range namedGroups.NamedGroupList { + if namedGroup == "GREASE" { + e.Curves = append(e.Curves, GREASE_PLACEHOLDER) + continue + } + + if group, ok := dicttls.DictSupportedGroupsNameIndexed[namedGroup]; ok { + e.Curves = append(e.Curves, CurveID(group)) + } else { + return fmt.Errorf("unknown named group: %s", namedGroup) + } + } + return nil +} + +func (e *SupportedCurvesExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 4492, sections 5.1.1 and RFC 8446, Section 4.2.7 + var curvesBytes cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&curvesBytes) || curvesBytes.Empty() { + return 0, errors.New("unable to read supported curves extension data") + } + curves := []CurveID{} + for !curvesBytes.Empty() { + var curve uint16 + if !curvesBytes.ReadUint16(&curve) { + return 0, errors.New("unable to read supported curves extension data") + } + curves = append(curves, CurveID(unGREASEUint16(curve))) + } + e.Curves = curves + return fullLen, nil +} + +func (e *SupportedCurvesExtension) writeToUConn(uc *UConn) error { + uc.config.CurvePreferences = e.Curves + uc.HandshakeState.Hello.SupportedCurves = e.Curves + return nil +} + +// SupportedPointsExtension implements ec_point_formats (11) +type SupportedPointsExtension struct { + SupportedPoints []uint8 +} + +func (e *SupportedPointsExtension) Len() int { + return 5 + len(e.SupportedPoints) +} + +func (e *SupportedPointsExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // http://tools.ietf.org/html/rfc4492#section-5.5.2 + b[0] = byte(extensionSupportedPoints >> 8) + b[1] = byte(extensionSupportedPoints) + b[2] = byte((1 + len(e.SupportedPoints)) >> 8) + b[3] = byte(1 + len(e.SupportedPoints)) + b[4] = byte(len(e.SupportedPoints)) + for i, pointFormat := range e.SupportedPoints { + b[5+i] = pointFormat + } + return e.Len(), io.EOF +} + +func (e *SupportedPointsExtension) UnmarshalJSON(data []byte) error { + var pointFormatList struct { + ECPointFormatList []string `json:"ec_point_format_list"` + } + if err := json.Unmarshal(data, &pointFormatList); err != nil { + return err + } + + for _, pointFormat := range pointFormatList.ECPointFormatList { + if format, ok := dicttls.DictECPointFormatNameIndexed[pointFormat]; ok { + e.SupportedPoints = append(e.SupportedPoints, format) + } else { + return fmt.Errorf("unknown point format: %s", pointFormat) + } + } + return nil +} + +func (e *SupportedPointsExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 4492, Section 5.1.2 + supportedPoints := []uint8{} + if !readUint8LengthPrefixed(&extData, &supportedPoints) || + len(supportedPoints) == 0 { + return 0, errors.New("unable to read supported points extension data") + } + e.SupportedPoints = supportedPoints + return fullLen, nil +} + +func (e *SupportedPointsExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.SupportedPoints = e.SupportedPoints + return nil +} + +// SignatureAlgorithmsExtension implements signature_algorithms (13) +type SignatureAlgorithmsExtension struct { + SupportedSignatureAlgorithms []SignatureScheme +} + +func (e *SignatureAlgorithmsExtension) Len() int { + return 6 + 2*len(e.SupportedSignatureAlgorithms) +} + +func (e *SignatureAlgorithmsExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // https://tools.ietf.org/html/rfc5246#section-7.4.1.4.1 + b[0] = byte(extensionSignatureAlgorithms >> 8) + b[1] = byte(extensionSignatureAlgorithms) + b[2] = byte((2 + 2*len(e.SupportedSignatureAlgorithms)) >> 8) + b[3] = byte(2 + 2*len(e.SupportedSignatureAlgorithms)) + b[4] = byte((2 * len(e.SupportedSignatureAlgorithms)) >> 8) + b[5] = byte(2 * len(e.SupportedSignatureAlgorithms)) + for i, sigScheme := range e.SupportedSignatureAlgorithms { + b[6+2*i] = byte(sigScheme >> 8) + b[7+2*i] = byte(sigScheme) + } + return e.Len(), io.EOF +} + +func (e *SignatureAlgorithmsExtension) UnmarshalJSON(data []byte) error { + var signatureAlgorithms struct { + Algorithms []string `json:"supported_signature_algorithms"` + } + if err := json.Unmarshal(data, &signatureAlgorithms); err != nil { + return err + } + + for _, sigScheme := range signatureAlgorithms.Algorithms { + if sigScheme == "GREASE" { + e.SupportedSignatureAlgorithms = append(e.SupportedSignatureAlgorithms, GREASE_PLACEHOLDER) + continue + } + + if scheme, ok := dicttls.DictSignatureSchemeNameIndexed[sigScheme]; ok { + e.SupportedSignatureAlgorithms = append(e.SupportedSignatureAlgorithms, SignatureScheme(scheme)) + } else { + return fmt.Errorf("unknown signature scheme: %s", sigScheme) + } + } + return nil +} + +func (e *SignatureAlgorithmsExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 5246, Section 7.4.1.4.1 + var sigAndAlgs cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sigAndAlgs) || sigAndAlgs.Empty() { + return 0, errors.New("unable to read signature algorithms extension data") + } + supportedSignatureAlgorithms := []SignatureScheme{} + for !sigAndAlgs.Empty() { + var sigAndAlg uint16 + if !sigAndAlgs.ReadUint16(&sigAndAlg) { + return 0, errors.New("unable to read signature algorithms extension data") + } + supportedSignatureAlgorithms = append( + supportedSignatureAlgorithms, SignatureScheme(sigAndAlg)) + } + e.SupportedSignatureAlgorithms = supportedSignatureAlgorithms + return fullLen, nil +} + +func (e *SignatureAlgorithmsExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.SupportedSignatureAlgorithms = e.SupportedSignatureAlgorithms + return nil +} + +// StatusRequestV2Extension implements status_request_v2 (17) +type StatusRequestV2Extension struct { +} + +func (e *StatusRequestV2Extension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.OcspStapling = true + return nil +} + +func (e *StatusRequestV2Extension) Len() int { + return 13 +} + +func (e *StatusRequestV2Extension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // RFC 4366, section 3.6 + b[0] = byte(extensionStatusRequestV2 >> 8) + b[1] = byte(extensionStatusRequestV2) + b[2] = 0 + b[3] = 9 + b[4] = 0 + b[5] = 7 + b[6] = 2 // OCSP type + b[7] = 0 + b[8] = 4 + // Two zero valued uint16s for the two lengths. + return e.Len(), io.EOF +} + +// Write is a no-op for StatusRequestV2Extension. No data for this extension. +func (e *StatusRequestV2Extension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 4366, Section 3.6 + var statusType uint8 + var ignored cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&ignored) || !ignored.ReadUint8(&statusType) { + return fullLen, errors.New("unable to read status request v2 extension data") + } + + if statusType != statusV2TypeOCSP { + return fullLen, errors.New("status request v2 extension statusType is not statusV2TypeOCSP(2)") + } + + return fullLen, nil +} + +func (e *StatusRequestV2Extension) UnmarshalJSON(_ []byte) error { + return nil // no-op +} + +// SignatureAlgorithmsCertExtension implements signature_algorithms_cert (50) +type SignatureAlgorithmsCertExtension struct { + SupportedSignatureAlgorithms []SignatureScheme +} + +func (e *SignatureAlgorithmsCertExtension) Len() int { + return 6 + 2*len(e.SupportedSignatureAlgorithms) +} + +func (e *SignatureAlgorithmsCertExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // https://tools.ietf.org/html/rfc5246#section-7.4.1.4.1 + b[0] = byte(extensionSignatureAlgorithmsCert >> 8) + b[1] = byte(extensionSignatureAlgorithmsCert) + b[2] = byte((2 + 2*len(e.SupportedSignatureAlgorithms)) >> 8) + b[3] = byte(2 + 2*len(e.SupportedSignatureAlgorithms)) + b[4] = byte((2 * len(e.SupportedSignatureAlgorithms)) >> 8) + b[5] = byte(2 * len(e.SupportedSignatureAlgorithms)) + for i, sigAndHash := range e.SupportedSignatureAlgorithms { + b[6+2*i] = byte(sigAndHash >> 8) + b[7+2*i] = byte(sigAndHash) + } + return e.Len(), io.EOF +} + +// Copied from SignatureAlgorithmsExtension.UnmarshalJSON +func (e *SignatureAlgorithmsCertExtension) UnmarshalJSON(data []byte) error { + var signatureAlgorithms struct { + Algorithms []string `json:"supported_signature_algorithms"` + } + if err := json.Unmarshal(data, &signatureAlgorithms); err != nil { + return err + } + + for _, sigScheme := range signatureAlgorithms.Algorithms { + if sigScheme == "GREASE" { + e.SupportedSignatureAlgorithms = append(e.SupportedSignatureAlgorithms, GREASE_PLACEHOLDER) + continue + } + + if scheme, ok := dicttls.DictSignatureSchemeNameIndexed[sigScheme]; ok { + e.SupportedSignatureAlgorithms = append(e.SupportedSignatureAlgorithms, SignatureScheme(scheme)) + } else { + return fmt.Errorf("unknown cert signature scheme: %s", sigScheme) + } + } + return nil +} + +// Write implementation copied from SignatureAlgorithmsExtension.Write +// +// Warning: not tested. +func (e *SignatureAlgorithmsCertExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 8446, Section 4.2.3 + var sigAndAlgs cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&sigAndAlgs) || sigAndAlgs.Empty() { + return 0, errors.New("unable to read signature algorithms extension data") + } + supportedSignatureAlgorithms := []SignatureScheme{} + for !sigAndAlgs.Empty() { + var sigAndAlg uint16 + if !sigAndAlgs.ReadUint16(&sigAndAlg) { + return 0, errors.New("unable to read signature algorithms extension data") + } + supportedSignatureAlgorithms = append( + supportedSignatureAlgorithms, SignatureScheme(sigAndAlg)) + } + e.SupportedSignatureAlgorithms = supportedSignatureAlgorithms + return fullLen, nil +} + +func (e *SignatureAlgorithmsCertExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.SupportedSignatureAlgorithms = e.SupportedSignatureAlgorithms + return nil +} + +// ALPNExtension implements application_layer_protocol_negotiation (16) +type ALPNExtension struct { + AlpnProtocols []string +} + +func (e *ALPNExtension) writeToUConn(uc *UConn) error { + uc.config.NextProtos = e.AlpnProtocols + uc.HandshakeState.Hello.AlpnProtocols = e.AlpnProtocols + return nil +} + +func (e *ALPNExtension) Len() int { + bLen := 2 + 2 + 2 + for _, s := range e.AlpnProtocols { + bLen += 1 + len(s) + } + return bLen +} + +func (e *ALPNExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + b[0] = byte(extensionALPN >> 8) + b[1] = byte(extensionALPN & 0xff) + lengths := b[2:] + b = b[6:] + + stringsLength := 0 + for _, s := range e.AlpnProtocols { + l := len(s) + b[0] = byte(l) + copy(b[1:], s) + b = b[1+l:] + stringsLength += 1 + l + } + + lengths[2] = byte(stringsLength >> 8) + lengths[3] = byte(stringsLength) + stringsLength += 2 + lengths[0] = byte(stringsLength >> 8) + lengths[1] = byte(stringsLength) + + return e.Len(), io.EOF +} + +func (e *ALPNExtension) UnmarshalJSON(b []byte) error { + var protocolNames struct { + ProtocolNameList []string `json:"protocol_name_list"` + } + + if err := json.Unmarshal(b, &protocolNames); err != nil { + return err + } + + e.AlpnProtocols = protocolNames.ProtocolNameList + return nil +} + +func (e *ALPNExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 7301, Section 3.1 + var protoList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&protoList) || protoList.Empty() { + return 0, errors.New("unable to read ALPN extension data") + } + alpnProtocols := []string{} + for !protoList.Empty() { + var proto cryptobyte.String + if !protoList.ReadUint8LengthPrefixed(&proto) || proto.Empty() { + return 0, errors.New("unable to read ALPN extension data") + } + alpnProtocols = append(alpnProtocols, string(proto)) + + } + e.AlpnProtocols = alpnProtocols + return fullLen, nil +} + +// ApplicationSettingsExtension represents the TLS ALPS extension. +// At the time of this writing, this extension is currently a draft: +// https://datatracker.ietf.org/doc/html/draft-vvv-tls-alps-01 +type ApplicationSettingsExtension struct { + SupportedProtocols []string +} + +func (e *ApplicationSettingsExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *ApplicationSettingsExtension) Len() int { + bLen := 2 + 2 + 2 // Type + Length + ALPS Extension length + for _, s := range e.SupportedProtocols { + bLen += 1 + len(s) // Supported ALPN Length + actual length of protocol + } + return bLen +} + +func (e *ApplicationSettingsExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + // Read Type. + b[0] = byte(utlsExtensionApplicationSettings >> 8) // hex: 44 dec: 68 + b[1] = byte(utlsExtensionApplicationSettings & 0xff) // hex: 69 dec: 105 + + lengths := b[2:] // get the remaining buffer without Type + b = b[6:] // set the buffer to the buffer without Type, Length and ALPS Extension Length (so only the Supported ALPN list remains) + + stringsLength := 0 + for _, s := range e.SupportedProtocols { + l := len(s) // Supported ALPN Length + b[0] = byte(l) // Supported ALPN Length in bytes hex: 02 dec: 2 + copy(b[1:], s) // copy the Supported ALPN as bytes to the buffer + b = b[1+l:] // set the buffer to the buffer without the Supported ALPN Length and Supported ALPN (so we can continue to the next protocol in this loop) + stringsLength += 1 + l // Supported ALPN Length (the field itself) + Supported ALPN Length (the value) + } + + lengths[2] = byte(stringsLength >> 8) // ALPS Extension Length hex: 00 dec: 0 + lengths[3] = byte(stringsLength) // ALPS Extension Length hex: 03 dec: 3 + stringsLength += 2 // plus ALPS Extension Length field length + lengths[0] = byte(stringsLength >> 8) // Length hex:00 dec: 0 + lengths[1] = byte(stringsLength) // Length hex: 05 dec: 5 + + return e.Len(), io.EOF +} + +func (e *ApplicationSettingsExtension) UnmarshalJSON(b []byte) error { + var applicationSettingsSupport struct { + SupportedProtocols []string `json:"supported_protocols"` + } + + if err := json.Unmarshal(b, &applicationSettingsSupport); err != nil { + return err + } + + e.SupportedProtocols = applicationSettingsSupport.SupportedProtocols + return nil +} + +// Write implementation copied from ALPNExtension.Write +func (e *ApplicationSettingsExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // https://datatracker.ietf.org/doc/html/draft-vvv-tls-alps-01 + var protoList cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&protoList) || protoList.Empty() { + return 0, errors.New("unable to read ALPN extension data") + } + alpnProtocols := []string{} + for !protoList.Empty() { + var proto cryptobyte.String + if !protoList.ReadUint8LengthPrefixed(&proto) || proto.Empty() { + return 0, errors.New("unable to read ALPN extension data") + } + alpnProtocols = append(alpnProtocols, string(proto)) + + } + e.SupportedProtocols = alpnProtocols + return fullLen, nil +} + +// SCTExtension implements signed_certificate_timestamp (18) +type SCTExtension struct { +} + +func (e *SCTExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.Scts = true + return nil +} + +func (e *SCTExtension) Len() int { + return 4 +} + +func (e *SCTExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // https://tools.ietf.org/html/rfc6962#section-3.3.1 + b[0] = byte(extensionSCT >> 8) + b[1] = byte(extensionSCT) + // zero uint16 for the zero-length extension_data + return e.Len(), io.EOF +} + +func (e *SCTExtension) UnmarshalJSON(_ []byte) error { + return nil // no-op +} + +func (e *SCTExtension) Write(_ []byte) (int, error) { + return 0, nil +} + +// GenericExtension allows to include in ClientHello arbitrary unsupported extensions. +// It is not defined in TLS RFCs nor by IANA. +// If a server echoes this extension back, the handshake will likely fail due to no further support. +type GenericExtension struct { + Id uint16 + Data []byte +} + +func (e *GenericExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *GenericExtension) Len() int { + return 4 + len(e.Data) +} + +func (e *GenericExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + b[0] = byte(e.Id >> 8) + b[1] = byte(e.Id) + b[2] = byte(len(e.Data) >> 8) + b[3] = byte(len(e.Data)) + if len(e.Data) > 0 { + copy(b[4:], e.Data) + } + return e.Len(), io.EOF +} + +func (e *GenericExtension) UnmarshalJSON(b []byte) error { + var genericExtension struct { + Name string `json:"name"` + Data []byte `json:"data"` + } + if err := json.Unmarshal(b, &genericExtension); err != nil { + return err + } + + // lookup extension ID by name + if id, ok := dicttls.DictExtTypeNameIndexed[genericExtension.Name]; ok { + e.Id = id + } else { + return fmt.Errorf("unknown extension name %s", genericExtension.Name) + } + e.Data = genericExtension.Data + return nil +} + +// ExtendedMasterSecretExtension implements extended_master_secret (23) +// +// Was named as ExtendedMasterSecretExtension, renamed due to crypto/tls +// implemented this extension's support. +type ExtendedMasterSecretExtension struct { +} + +// TODO: update when this extension is implemented in crypto/tls +// but we probably won't have to enable it in Config +func (e *ExtendedMasterSecretExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.Ems = true + return nil +} + +func (e *ExtendedMasterSecretExtension) Len() int { + return 4 +} + +func (e *ExtendedMasterSecretExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // https://tools.ietf.org/html/rfc7627 + b[0] = byte(extensionExtendedMasterSecret >> 8) + b[1] = byte(extensionExtendedMasterSecret) + // The length is 0 + return e.Len(), io.EOF +} + +func (e *ExtendedMasterSecretExtension) UnmarshalJSON(_ []byte) error { + return nil // no-op +} + +func (e *ExtendedMasterSecretExtension) Write(_ []byte) (int, error) { + // https://tools.ietf.org/html/rfc7627 + return 0, nil +} + +// GREASE stinks with dead parrots, have to be super careful, and, if possible, not include GREASE +// https://github.com/google/boringssl/blob/1c68fa2350936ca5897a66b430ebaf333a0e43f5/ssl/internal.h +const ( + ssl_grease_cipher = iota + ssl_grease_group + ssl_grease_extension1 + ssl_grease_extension2 + ssl_grease_version + ssl_grease_ticket_extension + ssl_grease_last_index = ssl_grease_ticket_extension +) + +// it is responsibility of user not to generate multiple grease extensions with same value +type UtlsGREASEExtension struct { + Value uint16 + Body []byte // in Chrome first grease has empty body, second grease has a single zero byte +} + +func (e *UtlsGREASEExtension) writeToUConn(uc *UConn) error { + return nil +} + +// will panic if ssl_grease_last_index[index] is out of bounds. +func GetBoringGREASEValue(greaseSeed [ssl_grease_last_index]uint16, index int) uint16 { + // GREASE value is back from deterministic to random. + // https://github.com/google/boringssl/blob/a365138ac60f38b64bfc608b493e0f879845cb88/ssl/handshake_client.c#L530 + ret := uint16(greaseSeed[index]) + /* This generates a random value of the form 0xωaωa, for all 0 ≤ ω < 16. */ + ret = (ret & 0xf0) | 0x0a + ret |= ret << 8 + return ret +} + +func (e *UtlsGREASEExtension) Len() int { + return 4 + len(e.Body) +} + +func (e *UtlsGREASEExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + b[0] = byte(e.Value >> 8) + b[1] = byte(e.Value) + b[2] = byte(len(e.Body) >> 8) + b[3] = byte(len(e.Body)) + if len(e.Body) > 0 { + copy(b[4:], e.Body) + } + return e.Len(), io.EOF +} + +func (e *UtlsGREASEExtension) Write(b []byte) (int, error) { + e.Value = GREASE_PLACEHOLDER + e.Body = make([]byte, len(b)) + n := copy(e.Body, b) + return n, nil +} + +func (e *UtlsGREASEExtension) UnmarshalJSON(b []byte) error { + var jsonObj struct { + Id uint16 `json:"id"` + Data []byte `json:"data"` + KeepID bool `json:"keep_id"` + KeepData bool `json:"keep_data"` + } + + if err := json.Unmarshal(b, &jsonObj); err != nil { + return err + } + + if jsonObj.Id == 0 { + return nil + } + + if isGREASEUint16(jsonObj.Id) { + if jsonObj.KeepID { + e.Value = jsonObj.Id + } + if jsonObj.KeepData { + e.Body = jsonObj.Data + } + return nil + } else { + return errors.New("GREASE extension id must be a GREASE value") + } +} + +// UtlsPaddingExtension implements padding (21) +type UtlsPaddingExtension struct { + PaddingLen int + WillPad bool // set to false to disable extension + + // Functor for deciding on padding length based on unpadded ClientHello length. + // If willPad is false, then this extension should not be included. + GetPaddingLen func(clientHelloUnpaddedLen int) (paddingLen int, willPad bool) +} + +func (e *UtlsPaddingExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *UtlsPaddingExtension) Len() int { + if e.WillPad { + return 4 + e.PaddingLen + } else { + return 0 + } +} + +func (e *UtlsPaddingExtension) Update(clientHelloUnpaddedLen int) { + if e.GetPaddingLen != nil { + e.PaddingLen, e.WillPad = e.GetPaddingLen(clientHelloUnpaddedLen) + } +} + +func (e *UtlsPaddingExtension) Read(b []byte) (int, error) { + if !e.WillPad { + return 0, io.EOF + } + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // https://tools.ietf.org/html/rfc7627 + b[0] = byte(utlsExtensionPadding >> 8) + b[1] = byte(utlsExtensionPadding) + b[2] = byte(e.PaddingLen >> 8) + b[3] = byte(e.PaddingLen) + return e.Len(), io.EOF +} + +func (e *UtlsPaddingExtension) UnmarshalJSON(b []byte) error { + var jsonObj struct { + Length uint `json:"len"` + } + if err := json.Unmarshal(b, &jsonObj); err != nil { + return err + } + + if jsonObj.Length == 0 { + e.GetPaddingLen = BoringPaddingStyle + } else { + e.PaddingLen = int(jsonObj.Length) + e.WillPad = true + } + + return nil +} + +func (e *UtlsPaddingExtension) Write(_ []byte) (int, error) { + e.GetPaddingLen = BoringPaddingStyle + return 0, nil +} + +// https://github.com/google/boringssl/blob/7d7554b6b3c79e707e25521e61e066ce2b996e4c/ssl/t1_lib.c#L2803 +func BoringPaddingStyle(unpaddedLen int) (int, bool) { + if unpaddedLen > 0xff && unpaddedLen < 0x200 { + paddingLen := 0x200 - unpaddedLen + if paddingLen >= 4+1 { + paddingLen -= 4 + } else { + paddingLen = 1 + } + return paddingLen, true + } + return 0, false +} + +// AlwaysPadToLen could be used for parsed ClientHello, since some fingerprints +// might not use BoringSSL padding style and we want to pad to a the same length. +func AlwaysPadToLen(padToLen int) func(int) (int, bool) { + return func(unpaddedLen int) (int, bool) { + if unpaddedLen < padToLen { + paddingLen := padToLen - unpaddedLen + if paddingLen >= 4+1 { + paddingLen -= 4 + } else { + paddingLen = 1 + } + return paddingLen, true + } + return 0, false + } +} + +// UtlsCompressCertExtension implements compress_certificate (27) and is only implemented client-side +// for server certificates. Alternate certificate message formats +// (https://datatracker.ietf.org/doc/html/rfc7250) are not supported. +// +// See https://datatracker.ietf.org/doc/html/rfc8879#section-3 +type UtlsCompressCertExtension struct { + Algorithms []CertCompressionAlgo +} + +func (e *UtlsCompressCertExtension) writeToUConn(uc *UConn) error { + uc.certCompressionAlgs = e.Algorithms + return nil +} + +func (e *UtlsCompressCertExtension) Len() int { + return 4 + 1 + (2 * len(e.Algorithms)) +} + +func (e *UtlsCompressCertExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + b[0] = byte(utlsExtensionCompressCertificate >> 8) + b[1] = byte(utlsExtensionCompressCertificate & 0xff) + + extLen := 2 * len(e.Algorithms) + if extLen > 255 { + return 0, errors.New("too many certificate compression methods") + } + + // Extension data length. + b[2] = byte((extLen + 1) >> 8) + b[3] = byte((extLen + 1) & 0xff) + + // Methods length. + b[4] = byte(extLen) + + i := 5 + for _, compMethod := range e.Algorithms { + b[i] = byte(compMethod >> 8) + b[i+1] = byte(compMethod) + i += 2 + } + return e.Len(), io.EOF +} + +func (e *UtlsCompressCertExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + methods := []CertCompressionAlgo{} + methodsRaw := new(cryptobyte.String) + if !extData.ReadUint8LengthPrefixed(methodsRaw) { + return 0, errors.New("unable to read cert compression algorithms extension data") + } + for !methodsRaw.Empty() { + var method uint16 + if !methodsRaw.ReadUint16(&method) { + return 0, errors.New("unable to read cert compression algorithms extension data") + } + methods = append(methods, CertCompressionAlgo(method)) + } + + e.Algorithms = methods + return fullLen, nil +} + +func (e *UtlsCompressCertExtension) UnmarshalJSON(b []byte) error { + var certificateCompressionAlgorithms struct { + Algorithms []string `json:"algorithms"` + } + if err := json.Unmarshal(b, &certificateCompressionAlgorithms); err != nil { + return err + } + + for _, algorithm := range certificateCompressionAlgorithms.Algorithms { + if alg, ok := dicttls.DictCertificateCompressionAlgorithmNameIndexed[algorithm]; ok { + e.Algorithms = append(e.Algorithms, CertCompressionAlgo(alg)) + } else { + return fmt.Errorf("unknown certificate compression algorithm %s", algorithm) + } + } + return nil +} + +// KeyShareExtension implements key_share (51) and is for TLS 1.3 only. +type KeyShareExtension struct { + KeyShares []KeyShare +} + +func (e *KeyShareExtension) Len() int { + return 4 + 2 + e.keySharesLen() +} + +func (e *KeyShareExtension) keySharesLen() int { + extLen := 0 + for _, ks := range e.KeyShares { + extLen += 4 + len(ks.Data) + } + return extLen +} + +func (e *KeyShareExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + b[0] = byte(extensionKeyShare >> 8) + b[1] = byte(extensionKeyShare) + keySharesLen := e.keySharesLen() + b[2] = byte((keySharesLen + 2) >> 8) + b[3] = byte(keySharesLen + 2) + b[4] = byte((keySharesLen) >> 8) + b[5] = byte(keySharesLen) + + i := 6 + for _, ks := range e.KeyShares { + b[i] = byte(ks.Group >> 8) + b[i+1] = byte(ks.Group) + b[i+2] = byte(len(ks.Data) >> 8) + b[i+3] = byte(len(ks.Data)) + copy(b[i+4:], ks.Data) + i += 4 + len(ks.Data) + } + + return e.Len(), io.EOF +} + +func (e *KeyShareExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 8446, Section 4.2.8 + var clientShares cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&clientShares) { + return 0, errors.New("unable to read key share extension data") + } + keyShares := []KeyShare{} + for !clientShares.Empty() { + var ks KeyShare + var group uint16 + if !clientShares.ReadUint16(&group) || + !readUint16LengthPrefixed(&clientShares, &ks.Data) || + len(ks.Data) == 0 { + return 0, errors.New("unable to read key share extension data") + } + ks.Group = CurveID(unGREASEUint16(group)) + // if not GREASE, key share data will be discarded as it should + // be generated per connection + if ks.Group != GREASE_PLACEHOLDER { + ks.Data = nil + } + keyShares = append(keyShares, ks) + } + e.KeyShares = keyShares + return fullLen, nil +} + +func (e *KeyShareExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.KeyShares = e.KeyShares + return nil +} + +func (e *KeyShareExtension) UnmarshalJSON(b []byte) error { + var keyShareClientHello struct { + ClientShares []struct { + Group string `json:"group"` + KeyExchange []uint8 `json:"key_exchange"` + } `json:"client_shares"` + } + if err := json.Unmarshal(b, &keyShareClientHello); err != nil { + return err + } + + for _, clientShare := range keyShareClientHello.ClientShares { + if clientShare.Group == "GREASE" { + e.KeyShares = append(e.KeyShares, KeyShare{ + Group: GREASE_PLACEHOLDER, + Data: clientShare.KeyExchange, + }) + continue + } + + if groupID, ok := dicttls.DictSupportedGroupsNameIndexed[clientShare.Group]; ok { + ks := KeyShare{ + Group: CurveID(groupID), + Data: clientShare.KeyExchange, + } + e.KeyShares = append(e.KeyShares, ks) + } else { + return fmt.Errorf("unknown group %s", clientShare.Group) + } + } + return nil +} + +// QUICTransportParametersExtension implements quic_transport_parameters (57). +// +// Currently, it works as a fake extension and does not support parsing, since +// the QUICConn provided by this package does not really understand these +// parameters. +type QUICTransportParametersExtension struct { + TransportParameters TransportParameters + + marshalResult []byte // TransportParameters will be marshaled into this slice +} + +func (e *QUICTransportParametersExtension) Len() int { + if e.marshalResult == nil { + e.marshalResult = e.TransportParameters.Marshal() + } + return 4 + len(e.marshalResult) +} + +func (e *QUICTransportParametersExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + b[0] = byte(extensionQUICTransportParameters >> 8) + b[1] = byte(extensionQUICTransportParameters) + // e.Len() is called before so that e.marshalResult is set + b[2] = byte((len(e.marshalResult)) >> 8) + b[3] = byte(len(e.marshalResult)) + copy(b[4:], e.marshalResult) + + return e.Len(), io.EOF +} + +func (e *QUICTransportParametersExtension) writeToUConn(*UConn) error { + // no need to set *UConn.quic.transportParams, since it is unused + return nil +} + +// PSKKeyExchangeModesExtension implements psk_key_exchange_modes (45). +type PSKKeyExchangeModesExtension struct { + Modes []uint8 +} + +func (e *PSKKeyExchangeModesExtension) Len() int { + return 4 + 1 + len(e.Modes) +} + +func (e *PSKKeyExchangeModesExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + if len(e.Modes) > 255 { + return 0, errors.New("too many PSK Key Exchange modes") + } + + b[0] = byte(extensionPSKModes >> 8) + b[1] = byte(extensionPSKModes) + + modesLen := len(e.Modes) + b[2] = byte((modesLen + 1) >> 8) + b[3] = byte(modesLen + 1) + b[4] = byte(modesLen) + + if len(e.Modes) > 0 { + copy(b[5:], e.Modes) + } + + return e.Len(), io.EOF +} + +func (e *PSKKeyExchangeModesExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 8446, Section 4.2.9 + // TODO: PSK Modes have their own form of GREASE-ing which is not currently implemented + // the current functionality will NOT re-GREASE/re-randomize these values when using a fingerprinted spec + // https://github.com/refraction-networking/utls/pull/58#discussion_r522354105 + // https://tools.ietf.org/html/draft-ietf-tls-grease-01#section-2 + pskModes := []uint8{} + if !readUint8LengthPrefixed(&extData, &pskModes) { + return 0, errors.New("unable to read PSK extension data") + } + e.Modes = pskModes + return fullLen, nil +} + +func (e *PSKKeyExchangeModesExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.PskModes = e.Modes + return nil +} + +func (e *PSKKeyExchangeModesExtension) UnmarshalJSON(b []byte) error { + var pskKeyExchangeModes struct { + Modes []string `json:"ke_modes"` + } + if err := json.Unmarshal(b, &pskKeyExchangeModes); err != nil { + return err + } + + for _, mode := range pskKeyExchangeModes.Modes { + if modeID, ok := dicttls.DictPSKKeyExchangeModeNameIndexed[mode]; ok { + e.Modes = append(e.Modes, modeID) + } else { + return fmt.Errorf("unknown PSK Key Exchange Mode %s", mode) + } + } + return nil +} + +// SupportedVersionsExtension implements supported_versions (43). +type SupportedVersionsExtension struct { + Versions []uint16 +} + +func (e *SupportedVersionsExtension) writeToUConn(uc *UConn) error { + uc.HandshakeState.Hello.SupportedVersions = e.Versions + return nil +} + +func (e *SupportedVersionsExtension) Len() int { + return 4 + 1 + (2 * len(e.Versions)) +} + +func (e *SupportedVersionsExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + extLen := 2 * len(e.Versions) + if extLen > 255 { + return 0, errors.New("too many supported versions") + } + + b[0] = byte(extensionSupportedVersions >> 8) + b[1] = byte(extensionSupportedVersions) + b[2] = byte((extLen + 1) >> 8) + b[3] = byte(extLen + 1) + b[4] = byte(extLen) + + i := 5 + for _, sv := range e.Versions { + b[i] = byte(sv >> 8) + b[i+1] = byte(sv) + i += 2 + } + return e.Len(), io.EOF +} + +func (e *SupportedVersionsExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + // RFC 8446, Section 4.2.1 + var versList cryptobyte.String + if !extData.ReadUint8LengthPrefixed(&versList) || versList.Empty() { + return 0, errors.New("unable to read supported versions extension data") + } + supportedVersions := []uint16{} + for !versList.Empty() { + var vers uint16 + if !versList.ReadUint16(&vers) { + return 0, errors.New("unable to read supported versions extension data") + } + supportedVersions = append(supportedVersions, unGREASEUint16(vers)) + } + e.Versions = supportedVersions + return fullLen, nil +} + +func (e *SupportedVersionsExtension) UnmarshalJSON(b []byte) error { + var supportedVersions struct { + Versions []string `json:"versions"` + } + if err := json.Unmarshal(b, &supportedVersions); err != nil { + return err + } + + for _, version := range supportedVersions.Versions { + switch version { + case "GREASE": + e.Versions = append(e.Versions, GREASE_PLACEHOLDER) + case "TLS 1.3": + e.Versions = append(e.Versions, VersionTLS13) + case "TLS 1.2": + e.Versions = append(e.Versions, VersionTLS12) + case "TLS 1.1": + e.Versions = append(e.Versions, VersionTLS11) + case "TLS 1.0": + e.Versions = append(e.Versions, VersionTLS10) + case "SSL 3.0": // deprecated + // e.Versions = append(e.Versions, VersionSSL30) + return fmt.Errorf("SSL 3.0 is deprecated") + default: + return fmt.Errorf("unknown version %s", version) + } + } + return nil +} + +// CookieExtension implements cookie (44). +// MUST NOT be part of initial ClientHello +type CookieExtension struct { + Cookie []byte +} + +func (e *CookieExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *CookieExtension) Len() int { + return 4 + len(e.Cookie) +} + +func (e *CookieExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + b[0] = byte(extensionCookie >> 8) + b[1] = byte(extensionCookie) + b[2] = byte(len(e.Cookie) >> 8) + b[3] = byte(len(e.Cookie)) + if len(e.Cookie) > 0 { + copy(b[4:], e.Cookie) + } + return e.Len(), io.EOF +} + +func (e *CookieExtension) UnmarshalJSON(data []byte) error { + var cookie struct { + Cookie []uint8 `json:"cookie"` + } + if err := json.Unmarshal(data, &cookie); err != nil { + return err + } + e.Cookie = []byte(cookie.Cookie) + return nil +} + +// NPNExtension implements next_protocol_negotiation (Not IANA assigned) +type NPNExtension struct { + NextProtos []string +} + +func (e *NPNExtension) writeToUConn(uc *UConn) error { + uc.config.NextProtos = e.NextProtos + uc.HandshakeState.Hello.NextProtoNeg = true + return nil +} + +func (e *NPNExtension) Len() int { + return 4 +} + +func (e *NPNExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + b[0] = byte(extensionNextProtoNeg >> 8) + b[1] = byte(extensionNextProtoNeg & 0xff) + // The length is always 0 + return e.Len(), io.EOF +} + +// Write is a no-op for NPNExtension. NextProtos are not included in the +// ClientHello. +func (e *NPNExtension) Write(_ []byte) (int, error) { + return 0, nil +} + +// draft-agl-tls-nextprotoneg-04: +// The "extension_data" field of a "next_protocol_negotiation" extension +// in a "ClientHello" MUST be empty. +func (e *NPNExtension) UnmarshalJSON(_ []byte) error { + return nil +} + +// RenegotiationInfoExtension implements renegotiation_info (65281) +type RenegotiationInfoExtension struct { + // Renegotiation field limits how many times client will perform renegotiation: no limit, once, or never. + // The extension still will be sent, even if Renegotiation is set to RenegotiateNever. + Renegotiation RenegotiationSupport // [UTLS] added for internal use only + + // RenegotiatedConnection is not yet properly handled, now we + // are just copying it to the client hello. + // + // If this is the initial handshake for a connection, then the + // "renegotiated_connection" field is of zero length in both the + // ClientHello and the ServerHello. + RenegotiatedConnection []byte +} + +func (e *RenegotiationInfoExtension) Len() int { + return 5 + len(e.RenegotiatedConnection) +} + +func (e *RenegotiationInfoExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + + dataLen := len(e.RenegotiatedConnection) + extBodyLen := 1 + dataLen + + b[0] = byte(extensionRenegotiationInfo >> 8) + b[1] = byte(extensionRenegotiationInfo & 0xff) + b[2] = byte(extBodyLen >> 8) + b[3] = byte(extBodyLen) + b[4] = byte(dataLen) + copy(b[5:], e.RenegotiatedConnection) + + return e.Len(), io.EOF +} + +func (e *RenegotiationInfoExtension) UnmarshalJSON(_ []byte) error { + e.Renegotiation = RenegotiateOnceAsClient + return nil +} + +func (e *RenegotiationInfoExtension) Write(b []byte) (int, error) { + e.Renegotiation = RenegotiateOnceAsClient // none empty or other modes are unsupported + // extData := cryptobyte.String(b) + // var renegotiatedConnection cryptobyte.String + // if !extData.ReadUint8LengthPrefixed(&renegotiatedConnection) || !extData.Empty() { + // return 0, errors.New("unable to read renegotiation info extension data") + // } + // e.RenegotiatedConnection = make([]byte, len(renegotiatedConnection)) + // copy(e.RenegotiatedConnection, renegotiatedConnection) + + // we don't really want to parse it at all. + + return len(b), nil +} + +func (e *RenegotiationInfoExtension) writeToUConn(uc *UConn) error { + uc.config.Renegotiation = e.Renegotiation + switch e.Renegotiation { + case RenegotiateOnceAsClient: + fallthrough + case RenegotiateFreelyAsClient: + uc.HandshakeState.Hello.SecureRenegotiationSupported = true + // TODO: don't do backward propagation here + if uc.handshakes > 0 { + e.RenegotiatedConnection = uc.clientFinished[:] + } + case RenegotiateNever: + default: + } + return nil +} + +/* +FAKE EXTENSIONS +*/ + +type FakeChannelIDExtension struct { + // The extension ID changed from 30031 to 30032. Set to true to use the old extension ID. + OldExtensionID bool +} + +func (e *FakeChannelIDExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *FakeChannelIDExtension) Len() int { + return 4 +} + +func (e *FakeChannelIDExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + extensionID := fakeExtensionChannelID + if e.OldExtensionID { + extensionID = fakeOldExtensionChannelID + } + // https://tools.ietf.org/html/draft-balfanz-tls-channelid-00 + b[0] = byte(extensionID >> 8) + b[1] = byte(extensionID & 0xff) + // The length is 0 + return e.Len(), io.EOF +} + +func (e *FakeChannelIDExtension) Write(_ []byte) (int, error) { + return 0, nil +} + +func (e *FakeChannelIDExtension) UnmarshalJSON(_ []byte) error { + return nil +} + +// FakeRecordSizeLimitExtension implements record_size_limit (28) +// but with no support. +type FakeRecordSizeLimitExtension struct { + Limit uint16 +} + +func (e *FakeRecordSizeLimitExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *FakeRecordSizeLimitExtension) Len() int { + return 6 +} + +func (e *FakeRecordSizeLimitExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // https://tools.ietf.org/html/draft-balfanz-tls-channelid-00 + b[0] = byte(fakeRecordSizeLimit >> 8) + b[1] = byte(fakeRecordSizeLimit & 0xff) + + b[2] = byte(0) + b[3] = byte(2) + + b[4] = byte(e.Limit >> 8) + b[5] = byte(e.Limit & 0xff) + return e.Len(), io.EOF +} + +func (e *FakeRecordSizeLimitExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + if !extData.ReadUint16(&e.Limit) { + return 0, errors.New("unable to read record size limit extension data") + } + return fullLen, nil +} + +func (e *FakeRecordSizeLimitExtension) UnmarshalJSON(data []byte) error { + var limitAccepter struct { + Limit uint16 `json:"record_size_limit"` + } + if err := json.Unmarshal(data, &limitAccepter); err != nil { + return err + } + + e.Limit = limitAccepter.Limit + return nil +} + +type DelegatedCredentialsExtension = FakeDelegatedCredentialsExtension + +// https://tools.ietf.org/html/rfc8472#section-2 +type FakeTokenBindingExtension struct { + MajorVersion, MinorVersion uint8 + KeyParameters []uint8 +} + +func (e *FakeTokenBindingExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *FakeTokenBindingExtension) Len() int { + // extension ID + data length + versions + key parameters length + key parameters + return 2 + 2 + 2 + 1 + len(e.KeyParameters) +} + +func (e *FakeTokenBindingExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + dataLen := e.Len() - 4 + b[0] = byte(fakeExtensionTokenBinding >> 8) + b[1] = byte(fakeExtensionTokenBinding & 0xff) + b[2] = byte(dataLen >> 8) + b[3] = byte(dataLen & 0xff) + b[4] = e.MajorVersion + b[5] = e.MinorVersion + b[6] = byte(len(e.KeyParameters)) + if len(e.KeyParameters) > 0 { + copy(b[7:], e.KeyParameters) + } + return e.Len(), io.EOF +} + +func (e *FakeTokenBindingExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + var keyParameters cryptobyte.String + if !extData.ReadUint8(&e.MajorVersion) || + !extData.ReadUint8(&e.MinorVersion) || + !extData.ReadUint8LengthPrefixed(&keyParameters) { + return 0, errors.New("unable to read token binding extension data") + } + e.KeyParameters = keyParameters + return fullLen, nil +} + +func (e *FakeTokenBindingExtension) UnmarshalJSON(data []byte) error { + var tokenBindingAccepter struct { + TB_ProtocolVersion struct { + Major uint8 `json:"major"` + Minor uint8 `json:"minor"` + } `json:"token_binding_version"` + TokenBindingKeyParameters []string `json:"key_parameters_list"` + } + if err := json.Unmarshal(data, &tokenBindingAccepter); err != nil { + return err + } + + e.MajorVersion = tokenBindingAccepter.TB_ProtocolVersion.Major + e.MinorVersion = tokenBindingAccepter.TB_ProtocolVersion.Minor + for _, param := range tokenBindingAccepter.TokenBindingKeyParameters { + switch param { + case "rsa2048_pkcs1.5": + e.KeyParameters = append(e.KeyParameters, 0) + case "rsa2048_pss": + e.KeyParameters = append(e.KeyParameters, 1) + case "ecdsap256": + e.KeyParameters = append(e.KeyParameters, 2) + default: + return fmt.Errorf("unknown token binding key parameter: %s", param) + } + } + return nil +} + +// https://datatracker.ietf.org/doc/html/draft-ietf-tls-subcerts-15#section-4.1.1 + +type FakeDelegatedCredentialsExtension struct { + SupportedSignatureAlgorithms []SignatureScheme +} + +func (e *FakeDelegatedCredentialsExtension) writeToUConn(uc *UConn) error { + return nil +} + +func (e *FakeDelegatedCredentialsExtension) Len() int { + return 6 + 2*len(e.SupportedSignatureAlgorithms) +} + +func (e *FakeDelegatedCredentialsExtension) Read(b []byte) (int, error) { + if len(b) < e.Len() { + return 0, io.ErrShortBuffer + } + // https://datatracker.ietf.org/doc/html/draft-ietf-tls-subcerts-15#section-4.1.1 + b[0] = byte(fakeExtensionDelegatedCredentials >> 8) + b[1] = byte(fakeExtensionDelegatedCredentials) + b[2] = byte((2 + 2*len(e.SupportedSignatureAlgorithms)) >> 8) + b[3] = byte((2 + 2*len(e.SupportedSignatureAlgorithms))) + b[4] = byte((2 * len(e.SupportedSignatureAlgorithms)) >> 8) + b[5] = byte((2 * len(e.SupportedSignatureAlgorithms))) + for i, sigAndHash := range e.SupportedSignatureAlgorithms { + b[6+2*i] = byte(sigAndHash >> 8) + b[7+2*i] = byte(sigAndHash) + } + return e.Len(), io.EOF +} + +func (e *FakeDelegatedCredentialsExtension) Write(b []byte) (int, error) { + fullLen := len(b) + extData := cryptobyte.String(b) + //https://datatracker.ietf.org/doc/html/draft-ietf-tls-subcerts-15#section-4.1.1 + var supportedAlgs cryptobyte.String + if !extData.ReadUint16LengthPrefixed(&supportedAlgs) || supportedAlgs.Empty() { + return 0, errors.New("unable to read signature algorithms extension data") + } + supportedSignatureAlgorithms := []SignatureScheme{} + for !supportedAlgs.Empty() { + var sigAndAlg uint16 + if !supportedAlgs.ReadUint16(&sigAndAlg) { + return 0, errors.New("unable to read signature algorithms extension data") + } + supportedSignatureAlgorithms = append( + supportedSignatureAlgorithms, SignatureScheme(sigAndAlg)) + } + e.SupportedSignatureAlgorithms = supportedSignatureAlgorithms + return fullLen, nil +} + +// Implementation copied from SignatureAlgorithmsExtension.UnmarshalJSON +func (e *FakeDelegatedCredentialsExtension) UnmarshalJSON(data []byte) error { + var signatureAlgorithms struct { + Algorithms []string `json:"supported_signature_algorithms"` + } + if err := json.Unmarshal(data, &signatureAlgorithms); err != nil { + return err + } + + for _, sigScheme := range signatureAlgorithms.Algorithms { + if sigScheme == "GREASE" { + e.SupportedSignatureAlgorithms = append(e.SupportedSignatureAlgorithms, GREASE_PLACEHOLDER) + continue + } + + if scheme, ok := dicttls.DictSignatureSchemeNameIndexed[sigScheme]; ok { + e.SupportedSignatureAlgorithms = append(e.SupportedSignatureAlgorithms, SignatureScheme(scheme)) + } else { + return fmt.Errorf("unknown delegated credentials signature scheme: %s", sigScheme) + } + } + return nil +} diff --git a/backend/vendor/github.com/wzshiming/socks5/.gitignore b/backend/vendor/github.com/wzshiming/socks5/.gitignore new file mode 100644 index 0000000..66fd13c --- /dev/null +++ b/backend/vendor/github.com/wzshiming/socks5/.gitignore @@ -0,0 +1,15 @@ +# Binaries for programs and plugins +*.exe +*.exe~ +*.dll +*.so +*.dylib + +# Test binary, built with `go test -c` +*.test + +# Output of the go coverage tool, specifically when used with LiteIDE +*.out + +# Dependency directories (remove the comment below to include it) +# vendor/ diff --git a/backend/vendor/github.com/wzshiming/socks5/Dockerfile b/backend/vendor/github.com/wzshiming/socks5/Dockerfile new file mode 100644 index 0000000..9b60a1a --- /dev/null +++ b/backend/vendor/github.com/wzshiming/socks5/Dockerfile @@ -0,0 +1,10 @@ +FROM golang:alpine AS builder +WORKDIR /go/src/github.com/wzshiming/socks5/ +COPY . . +ENV CGO_ENABLED=0 +RUN go install ./cmd/socks5 + +FROM alpine +EXPOSE 1080 +COPY --from=builder /go/bin/socks5 /usr/local/bin/ +ENTRYPOINT [ "/usr/local/bin/socks5" ] diff --git a/backend/vendor/github.com/wzshiming/socks5/LICENSE b/backend/vendor/github.com/wzshiming/socks5/LICENSE new file mode 100644 index 0000000..69889ab --- /dev/null +++ b/backend/vendor/github.com/wzshiming/socks5/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2020 wzshiming + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/backend/vendor/github.com/wzshiming/socks5/README.md b/backend/vendor/github.com/wzshiming/socks5/README.md new file mode 100644 index 0000000..0f29044 --- /dev/null +++ b/backend/vendor/github.com/wzshiming/socks5/README.md @@ -0,0 +1,33 @@ +# socks5 + +Socks5/Socks5h server and client + +[![Build](https://github.com/wzshiming/socks5/actions/workflows/go-cross-build.yml/badge.svg)](https://github.com/wzshiming/socks5/actions/workflows/go-cross-build.yml) +[![Go Report Card](https://goreportcard.com/badge/github.com/wzshiming/socks5)](https://goreportcard.com/report/github.com/wzshiming/socks5) +[![GoDoc](https://pkg.go.dev/badge/github.com/wzshiming/socks5)](https://pkg.go.dev/github.com/wzshiming/socks5) +[![GitHub license](https://img.shields.io/github/license/wzshiming/socks5.svg)](https://github.com/wzshiming/socks5/blob/master/LICENSE) + +This project is to add protocol support for the [Bridge](https://github.com/wzshiming/bridge), or it can be used alone + +The following is the implementation of other proxy protocols + +- [Socks4](https://github.com/wzshiming/socks4) +- [HTTP Proxy](https://github.com/wzshiming/httpproxy) +- [Shadow Socks](https://github.com/wzshiming/shadowsocks) +- [SSH Proxy](https://github.com/wzshiming/sshproxy) +- [Any Proxy](https://github.com/wzshiming/anyproxy) +- [Emux](https://github.com/wzshiming/emux) + +## Usage + +[API Documentation](https://godoc.org/github.com/wzshiming/socks5) + +[Example](https://github.com/wzshiming/socks5/blob/master/cmd/socks5/main.go) + +- [x] Support for the CONNECT command +- [x] Support for the BIND command +- [x] Support for the ASSOCIATE command + +## License + +Licensed under the MIT License. See [LICENSE](https://github.com/wzshiming/socks5/blob/master/LICENSE) for the full license text. diff --git a/backend/vendor/github.com/wzshiming/socks5/auth.go b/backend/vendor/github.com/wzshiming/socks5/auth.go new file mode 100644 index 0000000..30e4b76 --- /dev/null +++ b/backend/vendor/github.com/wzshiming/socks5/auth.go @@ -0,0 +1,21 @@ +package socks5 + +// AuthenticationFunc Authentication interface is implemented +type AuthenticationFunc func(cmd Command, username, password string) bool + +// Auth authentication processing +func (f AuthenticationFunc) Auth(cmd Command, username, password string) bool { + return f(cmd, username, password) +} + +// Authentication proxy authentication +type Authentication interface { + Auth(cmd Command, username, password string) bool +} + +// UserAuth basic authentication +func UserAuth(username, password string) Authentication { + return AuthenticationFunc(func(c Command, u, p string) bool { + return username == u && password == p + }) +} diff --git a/backend/vendor/github.com/wzshiming/socks5/client.go b/backend/vendor/github.com/wzshiming/socks5/client.go new file mode 100644 index 0000000..73b6c27 --- /dev/null +++ b/backend/vendor/github.com/wzshiming/socks5/client.go @@ -0,0 +1,370 @@ +package socks5 + +import ( + "context" + "errors" + "fmt" + "io" + "net" + "net/url" + "time" +) + +// Dialer is a SOCKS5 dialer. +type Dialer struct { + // ProxyNetwork network between a proxy server and a client + ProxyNetwork string + // ProxyAddress proxy server address + ProxyAddress string + // ProxyDial specifies the optional dial function for + // establishing the transport connection. + ProxyDial func(ctx context.Context, network string, address string) (net.Conn, error) + // ProxyPacketDial specifies the optional proxyPacketDial function for + // establishing the transport connection. + ProxyPacketDial func(ctx context.Context, network string, address string) (net.PacketConn, error) + // Username use username authentication if not empty + Username string + // Password use password authentication if not empty, + // only valid if username is set + Password string + // IsResolve resolve domain name on locally + IsResolve bool + // Resolver optionally specifies an alternate resolver to use + Resolver *net.Resolver + // Timeout is the maximum amount of time a dial will wait for + // a connect to complete. The default is no timeout + Timeout time.Duration +} + +// NewDialer returns a new Dialer that dials through the provided +// proxy server's network and address. +func NewDialer(addr string) (*Dialer, error) { + d := &Dialer{ + ProxyNetwork: "tcp", + Timeout: time.Minute, + } + u, err := url.Parse(addr) + if err != nil { + return nil, err + } + switch u.Scheme { + case "socks5": + d.IsResolve = true + case "socks5h": + default: + return nil, fmt.Errorf("unsupported protocol '%s'", u.Scheme) + } + host := u.Host + port := u.Port() + if port == "" { + port = "1080" + hostname := u.Hostname() + host = net.JoinHostPort(hostname, port) + } + if u.User != nil { + d.Username = u.User.Username() + d.Password, _ = u.User.Password() + } + d.ProxyAddress = host + return d, nil +} + +// DialContext connects to the provided address on the provided network. +func (d *Dialer) DialContext(ctx context.Context, network, address string) (net.Conn, error) { + switch network { + default: + return nil, fmt.Errorf("unsupported network %q", network) + case "tcp", "tcp4", "tcp6": + return d.do(ctx, ConnectCommand, address) + case "udp", "udp4", "udp6": + return d.do(ctx, AssociateCommand, address) + } +} + +// Dial connects to the provided address on the provided network. +func (d *Dialer) Dial(network, address string) (net.Conn, error) { + return d.DialContext(context.Background(), network, address) +} + +func (d *Dialer) Listen(ctx context.Context, network, address string) (net.Listener, error) { + switch network { + default: + return nil, fmt.Errorf("unsupported network %q", network) + case "tcp", "tcp4", "tcp6": + } + return &listener{ctx: ctx, d: d, address: address}, nil +} + +func (d *Dialer) do(ctx context.Context, cmd Command, address string) (net.Conn, error) { + if d.IsResolve { + host, port, err := net.SplitHostPort(address) + if err != nil { + return nil, err + } + if host != "" { + ip := net.ParseIP(host) + if ip == nil { + ipaddr, err := d.resolver().LookupIP(ctx, "ip4", host) + if err != nil { + ipaddr, err = d.resolver().LookupIP(ctx, "ip", host) + if err != nil { + return nil, err + } + } + host := ipaddr[0].String() + address = net.JoinHostPort(host, port) + } + } + } + + conn, err := d.proxyDial(ctx, d.ProxyNetwork, d.ProxyAddress) + if err != nil { + return nil, err + } + + return d.connect(ctx, conn, cmd, address) +} + +func (d *Dialer) connect(ctx context.Context, conn net.Conn, cmd Command, address string) (net.Conn, error) { + if d.Timeout != 0 { + deadline := time.Now().Add(d.Timeout) + if d, ok := ctx.Deadline(); !ok || deadline.Before(d) { + subCtx, cancel := context.WithDeadline(ctx, deadline) + defer cancel() + ctx = subCtx + } + } + if deadline, ok := ctx.Deadline(); ok && !deadline.IsZero() { + conn.SetDeadline(deadline) + defer conn.SetDeadline(time.Time{}) + } + + err := d.connectAuth(conn) + if err != nil { + return nil, err + } + + switch cmd { + default: + return nil, fmt.Errorf("unsupported Command %s", cmd) + case ConnectCommand: + _, err := d.connectCommand(conn, ConnectCommand, address) + if err != nil { + return nil, err + } + return conn, nil + case BindCommand: + _, err := d.connectCommand(conn, BindCommand, address) + if err != nil { + return nil, err + } + return conn, nil + case AssociateCommand: + targetIP, targetPort, err := splitHostPort(address) + if err != nil { + return nil, err + } + + addr, err := d.connectCommand(conn, AssociateCommand, ":0") + if err != nil { + return nil, err + } + + proxyIP, proxyPort, err := splitHostPort(addr.String()) + if err != nil { + return nil, err + } + + udpConn, err := d.proxyPacketDial(ctx, "udp", ":0") + if err != nil { + return nil, err + } + + targetAddr := &net.UDPAddr{ + IP: net.ParseIP(targetIP), + Port: targetPort, + } + proxyAddr := &net.UDPAddr{ + IP: net.ParseIP(proxyIP), + Port: proxyPort, + } + wrapConn, err := NewUDPConn(udpConn, proxyAddr, targetAddr) + if err != nil { + return nil, err + } + + go func() { + var buf [1]byte + for { + _, err := conn.Read(buf[:]) + if err != nil { + wrapConn.Close() + break + } + } + }() + return wrapConn, nil + } + +} + +func (d *Dialer) connectAuth(conn net.Conn) error { + _, err := conn.Write([]byte{socks5Version}) + if err != nil { + return err + } + if d.Username == "" { + err = writeBytes(conn, []byte{byte(noAuth)}) + if err != nil { + return err + } + } else { + err = writeBytes(conn, []byte{byte(noAuth), byte(userAuth)}) + if err != nil { + return err + } + } + + var header [2]byte + _, err = io.ReadFull(conn, header[:]) + if err != nil { + return err + } + if header[0] != socks5Version { + return fmt.Errorf("unexpected protocol version %d", header[0]) + } + if authMethod(header[1]) == noAcceptable { + return fmt.Errorf("no acceptable authentication methods %d", authMethod(header[1])) + } + switch authMethod(header[1]) { + default: + return fmt.Errorf("authentication method not supported %d", authMethod(header[1])) + case noAuth: + case userAuth: + if d.Username == "" { + return errors.New("need username/password") + } + + if len(d.Username) == 0 || len(d.Username) > 255 || len(d.Password) == 0 || len(d.Password) > 255 { + return errors.New("invalid username/password") + } + _, err = conn.Write([]byte{userAuthVersion}) + if err != nil { + return err + } + err = writeBytes(conn, []byte(d.Username)) + if err != nil { + return err + } + err = writeBytes(conn, []byte(d.Password)) + if err != nil { + return err + } + + _, err := io.ReadFull(conn, header[:]) + if err != nil { + return err + } + if header[0] != userAuthVersion { + return fmt.Errorf("invalid username/password version %d", header[0]) + } + if header[1] != authSuccess { + return fmt.Errorf("username/password authentication failed %d", header[1]) + } + } + return nil +} + +func (d *Dialer) connectCommand(conn net.Conn, cmd Command, address string) (net.Addr, error) { + _, err := conn.Write([]byte{socks5Version, byte(cmd), 0}) + if err != nil { + return nil, err + } + err = writeAddrWithStr(conn, address) + if err != nil { + return nil, err + } + + return d.readReply(conn) +} + +func (d *Dialer) readReply(conn net.Conn) (net.Addr, error) { + var header [3]byte + _, err := io.ReadFull(conn, header[:]) + if err != nil { + return nil, err + } + + if header[0] != socks5Version { + return nil, fmt.Errorf("unexpected protocol version %d", header[0]) + } + + if reply(header[1]) != successReply { + return nil, fmt.Errorf("unknown error %s", reply(header[1]).String()) + } + + return readAddr(conn) +} + +func (d *Dialer) resolver() *net.Resolver { + if d.Resolver == nil { + return net.DefaultResolver + } + return d.Resolver +} + +func (d *Dialer) proxyDial(ctx context.Context, network, address string) (net.Conn, error) { + proxyDial := d.ProxyDial + if proxyDial == nil { + var dialer net.Dialer + proxyDial = dialer.DialContext + } + return proxyDial(ctx, network, address) +} + +func (d *Dialer) proxyPacketDial(ctx context.Context, network, address string) (net.PacketConn, error) { + proxyPacketDial := d.ProxyPacketDial + if proxyPacketDial == nil { + var listener net.ListenConfig + proxyPacketDial = listener.ListenPacket + } + return proxyPacketDial(ctx, network, address) +} + +type listener struct { + ctx context.Context + d *Dialer + address string +} + +// Accept waits for and returns the next connection to the listener. +func (l *listener) Accept() (net.Conn, error) { + conn, err := l.d.do(l.ctx, BindCommand, l.address) + if err != nil { + return nil, err + } + addr, err := l.d.readReply(conn) + if err != nil { + return nil, err + } + return &connect{Conn: conn, remoteAddr: addr}, nil +} + +// Close closes the listener. +func (l *listener) Close() error { + return nil +} + +// address returns the listener's network address. +func (l *listener) Addr() net.Addr { + return nil +} + +type connect struct { + net.Conn + remoteAddr net.Addr +} + +func (c *connect) RemoteAddr() net.Addr { + return c.remoteAddr +} diff --git a/backend/vendor/github.com/wzshiming/socks5/common.go b/backend/vendor/github.com/wzshiming/socks5/common.go new file mode 100644 index 0000000..f9fc878 --- /dev/null +++ b/backend/vendor/github.com/wzshiming/socks5/common.go @@ -0,0 +1,379 @@ +package socks5 + +import ( + "context" + "encoding/binary" + "errors" + "io" + "math" + "net" + "os" + "reflect" + "runtime" + "strconv" + "strings" +) + +var ( + errStringTooLong = errors.New("string too long") + errUserAuthFailed = errors.New("user authentication failed") + errNoSupportedAuth = errors.New("no supported authentication mechanism") + errUnrecognizedAddrType = errors.New("unrecognized address type") +) + +const ( + maxUdpPacket = math.MaxUint16 - 28 + // maxHeaderSize is the maximum size of SOCKS5 header (3 bytes) plus address (up to 255 bytes for domain name) + // 3 bytes (header: RSV, RSV, FRAG) + 1 byte (ATYP) + 1 byte (domain length) + 255 bytes (domain) + 2 bytes (port) = 262 bytes + maxHeaderSize = 3 + 1 + 1 + 255 + 2 +) + +const ( + socks5Version = 0x05 +) + +const ( + ConnectCommand Command = 0x01 + BindCommand Command = 0x02 + AssociateCommand Command = 0x03 +) + +// Command is a SOCKS Command. +type Command byte + +func (cmd Command) String() string { + switch cmd { + case ConnectCommand: + return "socks connect" + case BindCommand: + return "socks bind" + case AssociateCommand: + return "socks associate" + default: + return "socks " + strconv.Itoa(int(cmd)) + } +} + +const ( + successReply reply = 0x00 + serverFailure reply = 0x01 + ruleFailure reply = 0x02 + networkUnreachable reply = 0x03 + hostUnreachable reply = 0x04 + connectionRefused reply = 0x05 + ttlExpired reply = 0x06 + commandNotSupported reply = 0x07 + addrTypeNotSupported reply = 0x08 +) + +func errToReply(err error) reply { + if err == nil { + return successReply + } + msg := err.Error() + resp := hostUnreachable + if strings.Contains(msg, "refused") { + resp = connectionRefused + } else if strings.Contains(msg, "network is unreachable") { + resp = networkUnreachable + } + return resp +} + +// reply is a SOCKS Command reply code. +type reply byte + +func (code reply) String() string { + switch code { + case successReply: + return "succeeded" + case serverFailure: + return "general SOCKS server failure" + case ruleFailure: + return "connection not allowed by ruleset" + case networkUnreachable: + return "network unreachable" + case hostUnreachable: + return "host unreachable" + case connectionRefused: + return "connection refused" + case ttlExpired: + return "TTL expired" + case commandNotSupported: + return "Command not supported" + case addrTypeNotSupported: + return "address type not supported" + default: + return "unknown code: " + strconv.Itoa(int(code)) + } +} + +const ( + ipv4Address = 0x01 + fqdnAddress = 0x03 + ipv6Address = 0x04 +) + +// address is a SOCKS-specific address. +// Either Name or IP is used exclusively. +type address struct { + Name string // fully-qualified domain name + IP net.IP + Port int +} + +func (a *address) Network() string { return "socks5" } + +func (a *address) String() string { + if a == nil { + return "" + } + return a.Address() +} + +// Address returns a string suitable to dial; prefer returning IP-based +// address, fallback to Name +func (a address) Address() string { + port := strconv.Itoa(a.Port) + if 0 != len(a.IP) { + return net.JoinHostPort(a.IP.String(), port) + } + return net.JoinHostPort(a.Name, port) +} + +// authMethod is a SOCKS authentication method. +type authMethod byte + +const ( + noAuth authMethod = 0x00 // no authentication required + gssapiAuth authMethod = 0x01 // use GSSAPI + userAuth authMethod = 0x02 // use username/password + noAcceptable authMethod = 0xff // no acceptable authentication methods +) + +const ( + userAuthVersion = 0x01 + authSuccess = 0x00 + authFailure = 0x01 +) + +func readBytes(r io.Reader) ([]byte, error) { + var buf [1]byte + _, err := r.Read(buf[:]) + if err != nil { + return nil, err + } + bytes := make([]byte, buf[0]) + _, err = io.ReadFull(r, bytes) + if err != nil { + return nil, err + } + return bytes, nil +} + +func writeBytes(w io.Writer, b []byte) error { + _, err := w.Write([]byte{byte(len(b))}) + if err != nil { + return err + } + _, err = w.Write(b) + return err +} + +func readByte(r io.Reader) (byte, error) { + var buf [1]byte + _, err := r.Read(buf[:]) + if err != nil { + return 0, err + } + return buf[0], nil +} + +func readAddr(r io.Reader) (*address, error) { + address := &address{} + + var addrType [1]byte + if _, err := r.Read(addrType[:]); err != nil { + return nil, err + } + + switch addrType[0] { + case ipv4Address: + addr := make(net.IP, net.IPv4len) + if _, err := io.ReadFull(r, addr); err != nil { + return nil, err + } + address.IP = addr + case ipv6Address: + addr := make(net.IP, net.IPv6len) + if _, err := io.ReadFull(r, addr); err != nil { + return nil, err + } + address.IP = addr + case fqdnAddress: + if _, err := r.Read(addrType[:]); err != nil { + return nil, err + } + addrLen := int(addrType[0]) + fqdn := make([]byte, addrLen) + if _, err := io.ReadFull(r, fqdn); err != nil { + return nil, err + } + address.Name = string(fqdn) + default: + return nil, errUnrecognizedAddrType + } + var port [2]byte + if _, err := io.ReadFull(r, port[:]); err != nil { + return nil, err + } + address.Port = int(binary.BigEndian.Uint16(port[:])) + return address, nil +} + +func writeAddr(w io.Writer, addr *address) error { + if addr == nil { + _, err := w.Write([]byte{ipv4Address, 0, 0, 0, 0, 0, 0}) + if err != nil { + return err + } + return nil + } + if addr.IP != nil { + if ip4 := addr.IP.To4(); ip4 != nil { + _, err := w.Write([]byte{ipv4Address}) + if err != nil { + return err + } + _, err = w.Write(ip4) + if err != nil { + return err + } + } else if ip6 := addr.IP.To16(); ip6 != nil { + _, err := w.Write([]byte{ipv6Address}) + if err != nil { + return err + } + _, err = w.Write(ip6) + if err != nil { + return err + } + } else { + _, err := w.Write([]byte{ipv4Address, 0, 0, 0, 0}) + if err != nil { + return err + } + } + } else if addr.Name != "" { + if len(addr.Name) > 255 { + return errStringTooLong + } + _, err := w.Write([]byte{fqdnAddress, byte(len(addr.Name))}) + if err != nil { + return err + } + _, err = w.Write([]byte(addr.Name)) + if err != nil { + return err + } + } else { + _, err := w.Write([]byte{ipv4Address, 0, 0, 0, 0}) + if err != nil { + return err + } + } + var p [2]byte + binary.BigEndian.PutUint16(p[:], uint16(addr.Port)) + _, err := w.Write(p[:]) + return err +} + +func writeAddrWithStr(w io.Writer, addr string) error { + host, port, err := splitHostPort(addr) + if err != nil { + return err + } + if ip := net.ParseIP(host); ip != nil { + return writeAddr(w, &address{IP: ip, Port: port}) + } + return writeAddr(w, &address{Name: host, Port: port}) +} + +func splitHostPort(address string) (string, int, error) { + host, port, err := net.SplitHostPort(address) + if err != nil { + return "", 0, err + } + portnum, err := strconv.Atoi(port) + if err != nil { + return "", 0, err + } + if 0 > portnum || portnum > 0xffff { + return "", 0, errors.New("port number out of range " + port) + } + return host, portnum, nil +} + +// isClosedConnError reports whether err is an error from use of a closed +// network connection. +func isClosedConnError(err error) bool { + if err == nil { + return false + } + + str := err.Error() + if strings.Contains(str, "use of closed network connection") { + return true + } + + if runtime.GOOS == "windows" { + if oe, ok := err.(*net.OpError); ok && oe.Op == "read" { + if se, ok := oe.Err.(*os.SyscallError); ok && se.Syscall == "wsarecv" { + const WSAECONNABORTED = 10053 + const WSAECONNRESET = 10054 + if n := errno(se.Err); n == WSAECONNRESET || n == WSAECONNABORTED { + return true + } + } + } + } + return false +} + +func errno(v error) uintptr { + if rv := reflect.ValueOf(v); rv.Kind() == reflect.Uintptr { + return uintptr(rv.Uint()) + } + return 0 +} + +// tunnel create tunnels for two io.ReadWriteCloser +func tunnel(ctx context.Context, c1, c2 io.ReadWriteCloser, buf1, buf2 []byte) error { + errCh := make(chan error, 2) + go func() { + _, err := io.CopyBuffer(c1, c2, buf1) + errCh <- err + }() + go func() { + _, err := io.CopyBuffer(c2, c1, buf2) + errCh <- err + }() + defer func() { + _ = c1.Close() + _ = c2.Close() + }() + + select { + case err := <-errCh: + return err + case <-ctx.Done(): + return ctx.Err() + } +} + +// BytesPool is an interface for getting and returning temporary +// bytes for use by io.CopyBuffer. +type BytesPool interface { + Get() []byte + Put([]byte) +} diff --git a/backend/vendor/github.com/wzshiming/socks5/server.go b/backend/vendor/github.com/wzshiming/socks5/server.go new file mode 100644 index 0000000..94bee16 --- /dev/null +++ b/backend/vendor/github.com/wzshiming/socks5/server.go @@ -0,0 +1,595 @@ +package socks5 + +import ( + "bytes" + "context" + "fmt" + "io" + "net" + "sync" + "sync/atomic" + "time" +) + +// Server is accepting connections and handling the details of the SOCKS5 protocol +type Server struct { + // Authentication is proxy authentication + Authentication Authentication + // ProxyDial specifies the optional proxyDial function for + // establishing the transport connection. + ProxyDial func(ctx context.Context, network string, address string) (net.Conn, error) + // ProxyListen specifies the optional proxyListen function for + // establishing the transport connection. + ProxyListen func(ctx context.Context, network string, address string) (net.Listener, error) + // ProxyListenPacket specifies the optional proxyListenPacket function for + // establishing the transport connection. + ProxyListenPacket func(ctx context.Context, network string, address string) (net.PacketConn, error) + // PacketForwardAddress specifies the packet forwarding address + PacketForwardAddress func(ctx context.Context, destinationAddr string, packet net.PacketConn, conn net.Conn) (net.IP, int, error) + // ProxyListenBind specifies the optional proxyListenBind function for + // establishing the transport connection. + ProxyListenBind func(ctx context.Context, network string, address string) (net.Listener, error) + // ListenBindReuseTimeout is the timeout for reusing bind listener + ListenBindReuseTimeout time.Duration + // ListenBindAcceptTimeout is the timeout for accepting connections on bind listener + ListenBindAcceptTimeout time.Duration + // reserveListenBind is a pool for reusing bind listeners across requests. + reserveListenBind reserveListen + // Logger error log + Logger Logger + // Context is default context + Context context.Context + // BytesPool getting and returning temporary bytes for use by io.CopyBuffer + BytesPool BytesPool +} + +type Logger interface { + Println(v ...interface{}) +} + +// NewServer creates a new Server +func NewServer() *Server { + return &Server{ + ListenBindReuseTimeout: time.Second / 2, + } +} + +// ListenAndServe is used to create a listener and serve on it +func (s *Server) ListenAndServe(network, addr string) error { + l, err := s.proxyListen(s.context(), network, addr) + if err != nil { + return err + } + return s.Serve(l) +} + +func (s *Server) proxyListen(ctx context.Context, network, address string) (net.Listener, error) { + proxyListen := s.ProxyListen + if proxyListen == nil { + var listenConfig net.ListenConfig + proxyListen = listenConfig.Listen + } + return proxyListen(ctx, network, address) +} + +func (s *Server) proxyListenBind(ctx context.Context, network, address string) (net.Listener, error) { + proxyListenBind := s.ProxyListenBind + if proxyListenBind == nil { + var listenConfig net.ListenConfig + proxyListenBind = listenConfig.Listen + } + return proxyListenBind(ctx, network, address) +} + +// Serve is used to serve connections from a listener +func (s *Server) Serve(l net.Listener) error { + for { + conn, err := l.Accept() + if err != nil { + return err + } + go s.ServeConn(conn) + } +} + +// ServeConn is used to serve a single connection. +func (s *Server) ServeConn(conn net.Conn) { + defer conn.Close() + err := s.serveConn(conn) + if err != nil && s.Logger != nil && !isClosedConnError(err) { + s.Logger.Println(err) + } +} + +func (s *Server) serveConn(conn net.Conn) error { + version, err := readByte(conn) + if err != nil { + return err + } + if version != socks5Version { + return fmt.Errorf("unsupported SOCKS version: %d", version) + } + + req := &request{ + Version: socks5Version, + Conn: conn, + } + + methods, err := readBytes(conn) + if err != nil { + return err + } + + if s.Authentication != nil && bytes.IndexByte(methods, byte(userAuth)) != -1 { + _, err := conn.Write([]byte{socks5Version, byte(userAuth)}) + if err != nil { + return err + } + + header, err := readByte(conn) + if err != nil { + return err + } + if header != userAuthVersion { + return fmt.Errorf("unsupported auth version: %d", header) + } + + username, err := readBytes(conn) + if err != nil { + return err + } + req.Username = string(username) + + password, err := readBytes(conn) + if err != nil { + return err + } + req.Password = string(password) + + if !s.Authentication.Auth(req.Command, req.Username, req.Password) { + _, err := conn.Write([]byte{userAuthVersion, authFailure}) + if err != nil { + return err + } + return errUserAuthFailed + } + _, err = conn.Write([]byte{userAuthVersion, authSuccess}) + if err != nil { + return err + } + } else if s.Authentication == nil && bytes.IndexByte(methods, byte(noAuth)) != -1 { + _, err := conn.Write([]byte{socks5Version, byte(noAuth)}) + if err != nil { + return err + } + } else { + _, err := conn.Write([]byte{socks5Version, byte(noAcceptable)}) + if err != nil { + return err + } + return errNoSupportedAuth + } + + var header [3]byte + _, err = io.ReadFull(conn, header[:]) + if err != nil { + return err + } + + if header[0] != socks5Version { + return fmt.Errorf("unsupported Command version: %d", header[0]) + } + + req.Command = Command(header[1]) + + dest, err := readAddr(conn) + if err != nil { + if err == errUnrecognizedAddrType { + err := sendReply(conn, addrTypeNotSupported, nil) + if err != nil { + return err + } + } + return err + } + req.DestinationAddr = dest + err = s.handle(req) + if err != nil { + return err + } + + return nil +} + +func (s *Server) handle(req *request) error { + switch req.Command { + case ConnectCommand: + return s.handleConnect(req) + case BindCommand: + return s.handleBind(req) + case AssociateCommand: + return s.handleAssociate(req) + default: + if err := sendReply(req.Conn, commandNotSupported, nil); err != nil { + return err + } + return fmt.Errorf("unsupported Command: %v", req.Command) + } +} + +func (s *Server) handleConnect(req *request) error { + ctx := s.context() + target, err := s.proxyDial(ctx, "tcp", req.DestinationAddr.Address()) + if err != nil { + if err := sendReply(req.Conn, errToReply(err), nil); err != nil { + return fmt.Errorf("failed to send reply: %v", err) + } + return fmt.Errorf("connect to %v failed: %w", req.DestinationAddr, err) + } + defer target.Close() + + localAddr := target.LocalAddr() + local, ok := localAddr.(*net.TCPAddr) + if !ok { + return fmt.Errorf("connect to %v failed: local address is %s://%s", req.DestinationAddr, localAddr.Network(), localAddr.String()) + } + bind := address{IP: local.IP, Port: local.Port} + if err := sendReply(req.Conn, successReply, &bind); err != nil { + return fmt.Errorf("failed to send reply: %v", err) + } + + var buf1, buf2 []byte + if s.BytesPool != nil { + buf1 = s.BytesPool.Get() + buf2 = s.BytesPool.Get() + defer func() { + s.BytesPool.Put(buf1) + s.BytesPool.Put(buf2) + }() + } else { + buf1 = make([]byte, 32*1024) + buf2 = make([]byte, 32*1024) + } + return tunnel(ctx, target, req.Conn, buf1, buf2) +} + +func (s *Server) handleBind(req *request) error { + ctx := s.context() + addr := req.DestinationAddr.String() + + var listener net.Listener + var err error + if s.ListenBindReuseTimeout > 0 { + listener, err = s.reserveListenBind.getOrNew(addr, func() (net.Listener, error) { + return s.proxyListenBind(ctx, "tcp", addr) + }, s.ListenBindReuseTimeout, s.ListenBindAcceptTimeout, s.Logger) + } else { + listener, err = s.proxyListenBind(ctx, "tcp", addr) + } + if err != nil { + if err := sendReply(req.Conn, errToReply(err), nil); err != nil { + return fmt.Errorf("failed to send reply: %v", err) + } + return fmt.Errorf("connect to %v failed: %w", req.DestinationAddr, err) + } + + localAddr := listener.Addr() + local, ok := localAddr.(*net.TCPAddr) + if !ok { + listener.Close() + return fmt.Errorf("connect to %v failed: local address is %s://%s", req.DestinationAddr, localAddr.Network(), localAddr.String()) + } + bind := address{IP: local.IP, Port: local.Port} + if err := sendReply(req.Conn, successReply, &bind); err != nil { + listener.Close() + return fmt.Errorf("failed to send reply: %v", err) + } + + conn, err := listener.Accept() + if err != nil { + listener.Close() + if err := sendReply(req.Conn, errToReply(err), nil); err != nil { + return fmt.Errorf("failed to send reply: %v", err) + } + return fmt.Errorf("connect to %v failed: %w", req.DestinationAddr, err) + } + listener.Close() + + remoteAddr := conn.RemoteAddr() + local, ok = remoteAddr.(*net.TCPAddr) + if !ok { + return fmt.Errorf("connect to %v failed: remote address is %s://%s", req.DestinationAddr, localAddr.Network(), localAddr.String()) + } + bind = address{IP: local.IP, Port: local.Port} + if err := sendReply(req.Conn, successReply, &bind); err != nil { + return fmt.Errorf("failed to send reply: %v", err) + } + + var buf1, buf2 []byte + if s.BytesPool != nil { + buf1 = s.BytesPool.Get() + buf2 = s.BytesPool.Get() + defer func() { + s.BytesPool.Put(buf1) + s.BytesPool.Put(buf2) + }() + } else { + buf1 = make([]byte, 32*1024) + buf2 = make([]byte, 32*1024) + } + return tunnel(ctx, conn, req.Conn, buf1, buf2) +} + +func (s *Server) handleAssociate(req *request) error { + ctx := s.context() + destinationAddr := req.DestinationAddr.String() + udpConn, err := s.proxyListenPacket(ctx, "udp", destinationAddr) + if err != nil { + if err := sendReply(req.Conn, errToReply(err), nil); err != nil { + return fmt.Errorf("failed to send reply: %v", err) + } + return fmt.Errorf("connect to %v failed: %w", req.DestinationAddr, err) + } + defer udpConn.Close() + + replyPacketForwardAddress := defaultReplyPacketForwardAddress + if s.PacketForwardAddress != nil { + replyPacketForwardAddress = s.PacketForwardAddress + } + ip, port, err := replyPacketForwardAddress(ctx, destinationAddr, udpConn, req.Conn) + if err != nil { + return err + } + bind := address{IP: ip, Port: port} + if err := sendReply(req.Conn, successReply, &bind); err != nil { + return fmt.Errorf("failed to send reply: %v", err) + } + + go func() { + var buf [1]byte + for { + _, err := req.Conn.Read(buf[:]) + if err != nil { + udpConn.Close() + break + } + } + }() + + var ( + sourceAddr net.Addr + wantSource string + buf [maxUdpPacket]byte + replyBuf [maxHeaderSize]byte + ) + + for { + n, addr, err := udpConn.ReadFrom(buf[:]) + if err != nil { + return err + } + + if sourceAddr == nil { + sourceAddr = addr + wantSource = sourceAddr.String() + } + + gotAddr := addr.String() + if wantSource == gotAddr { + // Packet from client to target + if n < 3 { + continue + } + reader := bytes.NewBuffer(buf[3:n]) + targetAddr, err := readAddr(reader) + if err != nil { + if s.Logger != nil { + s.Logger.Println(err) + } + continue + } + target := &net.UDPAddr{ + IP: targetAddr.IP, + Port: targetAddr.Port, + } + _, err = udpConn.WriteTo(reader.Bytes(), target) + if err != nil { + return err + } + } else { + headWriter := bytes.NewBuffer(replyBuf[:0]) + headWriter.Write([]byte{0, 0, 0}) + err = writeAddrWithStr(headWriter, gotAddr) + if err != nil { + if s.Logger != nil { + s.Logger.Println(err) + } + continue + } + prefixLen := headWriter.Len() + + // Check if data length plus header exceeds maximum UDP packet limit + if prefixLen+n > maxUdpPacket { + if s.Logger != nil { + s.Logger.Println(fmt.Errorf("dropping packet: data length (%d) + header length (%d) = %d exceeds max UDP packet size %d", n, prefixLen, prefixLen+n, maxUdpPacket)) + } + continue + } + + copy(buf[prefixLen:prefixLen+n], buf[:n]) + copy(buf[:prefixLen], headWriter.Bytes()) + + _, err = udpConn.WriteTo(buf[:prefixLen+n], sourceAddr) + if err != nil { + return err + } + } + } +} + +func (s *Server) proxyDial(ctx context.Context, network, address string) (net.Conn, error) { + proxyDial := s.ProxyDial + if proxyDial == nil { + var dialer net.Dialer + proxyDial = dialer.DialContext + } + return proxyDial(ctx, network, address) +} + +func (s *Server) proxyListenPacket(ctx context.Context, network, address string) (net.PacketConn, error) { + proxyListenPacket := s.ProxyListenPacket + if proxyListenPacket == nil { + var listener net.ListenConfig + proxyListenPacket = listener.ListenPacket + } + return proxyListenPacket(ctx, network, address) +} + +func (s *Server) context() context.Context { + if s.Context == nil { + return context.Background() + } + return s.Context +} + +func sendReply(w io.Writer, resp reply, addr *address) error { + _, err := w.Write([]byte{socks5Version, byte(resp), 0}) + if err != nil { + return err + } + err = writeAddr(w, addr) + return err +} + +type request struct { + Version uint8 + Command Command + DestinationAddr *address + Username string + Password string + Conn net.Conn +} + +func defaultReplyPacketForwardAddress(ctx context.Context, destinationAddr string, packet net.PacketConn, conn net.Conn) (net.IP, int, error) { + udpLocal := packet.LocalAddr() + udpLocalAddr, ok := udpLocal.(*net.UDPAddr) + if !ok { + return nil, 0, fmt.Errorf("connect to %v failed: local address is %s://%s", destinationAddr, udpLocal.Network(), udpLocal.String()) + } + + tcpLocal := conn.LocalAddr() + tcpLocalAddr, ok := tcpLocal.(*net.TCPAddr) + if !ok { + return nil, 0, fmt.Errorf("connect to %v failed: local address is %s://%s", destinationAddr, tcpLocal.Network(), tcpLocal.String()) + } + return tcpLocalAddr.IP, udpLocalAddr.Port, nil +} + +type reserveListen struct { + mut sync.Mutex + reservedListeners map[string]*reserved +} + +type reserved struct { + key string + base net.Listener + conns chan net.Conn +} + +type holdListener struct { + r *reserved + closed atomic.Bool +} + +func (r *reserveListen) getOrNew(key string, newFunc func() (net.Listener, error), reuse, accept time.Duration, logger Logger) (net.Listener, error) { + r.mut.Lock() + defer r.mut.Unlock() + + reserve := r.reservedListeners[key] + if reserve != nil { + return &holdListener{r: reserve}, nil + } + + listener, err := newFunc() + if err != nil { + return nil, err + } + reserve = &reserved{ + key: key, + base: listener, + conns: make(chan net.Conn), + } + if r.reservedListeners == nil { + r.reservedListeners = map[string]*reserved{} + } + r.reservedListeners[key] = reserve + + if accept > 0 { + _, ok := listener.(setDeadline) + if !ok { + accept = 0 + if logger != nil { + logger.Println("reserve bind listener does not support SetDeadline, disabling accept timeout") + } + } + } + go reserve.run(reuse, accept, logger) + return &holdListener{r: reserve}, nil +} + +type setDeadline interface { + SetDeadline(t time.Time) error +} + +func (r *reserved) run(reuse, accept time.Duration, logger Logger) { + defer func() { + r.base.Close() + close(r.conns) + }() + + for { + if accept > 0 { + r.base.(setDeadline).SetDeadline(time.Now().Add(accept)) + } + conn, err := r.base.Accept() + if err != nil { + if logger != nil { + logger.Println("reserve bind listen accept error:", err) + } + return + } + + select { + case r.conns <- conn: + case <-time.After(reuse): + conn.Close() + if logger != nil { + logger.Println("reserve bind listen reuse timeout") + } + return + } + } +} + +func (h *holdListener) Accept() (net.Conn, error) { + if h.closed.Load() { + return nil, net.ErrClosed + } + conn, ok := <-h.r.conns + if !ok { + h.closed.Store(true) + return nil, net.ErrClosed + } + return conn, nil +} + +func (h *holdListener) Close() error { + if h.closed.Swap(true) { + return net.ErrClosed + } + return nil +} + +func (h *holdListener) Addr() net.Addr { + return h.r.base.Addr() +} diff --git a/backend/vendor/github.com/wzshiming/socks5/simple_server.go b/backend/vendor/github.com/wzshiming/socks5/simple_server.go new file mode 100644 index 0000000..bdd8168 --- /dev/null +++ b/backend/vendor/github.com/wzshiming/socks5/simple_server.go @@ -0,0 +1,99 @@ +package socks5 + +import ( + "context" + "fmt" + "net" + "net/url" + "time" +) + +// SimpleServer is a simplified server, which can be configured as easily as client. +type SimpleServer struct { + Server + Listener net.Listener + Network string + Address string + Username string + Password string +} + +// NewServer creates a new NewSimpleServer +func NewSimpleServer(addr string) (*SimpleServer, error) { + s := &SimpleServer{} + u, err := url.Parse(addr) + if err != nil { + return nil, err + } + switch u.Scheme { + case "socks5", "socks5h": + default: + return nil, fmt.Errorf("unsupported protocol '%s'", u.Scheme) + } + host := u.Host + port := u.Port() + if port == "" { + port = "1080" + hostname := u.Hostname() + host = net.JoinHostPort(hostname, port) + } + if u.User != nil { + s.Username = u.User.Username() + s.Password, _ = u.User.Password() + s.Authentication = UserAuth(s.Username, s.Password) + } + + s.Address = host + s.Network = "tcp" + s.ListenBindReuseTimeout = time.Second / 2 + return s, nil +} + +// Run the server +func (s *SimpleServer) Run(ctx context.Context) error { + var listenConfig net.ListenConfig + if s.Listener == nil { + listener, err := listenConfig.Listen(ctx, s.Network, s.Address) + if err != nil { + return err + } + s.Listener = listener + } + s.Address = s.Listener.Addr().String() + return s.Serve(s.Listener) +} + +// Start the server +func (s *SimpleServer) Start(ctx context.Context) error { + var listenConfig net.ListenConfig + if s.Listener == nil { + listener, err := listenConfig.Listen(ctx, s.Network, s.Address) + if err != nil { + return err + } + s.Listener = listener + } + s.Address = s.Listener.Addr().String() + go s.Serve(s.Listener) + return nil +} + +// Close closes the listener +func (s *SimpleServer) Close() error { + if s.Listener == nil { + return nil + } + return s.Listener.Close() +} + +// ProxyURL returns the URL of the proxy +func (s *SimpleServer) ProxyURL() string { + u := url.URL{ + Scheme: "socks5", + Host: s.Address, + } + if s.Username != "" { + u.User = url.UserPassword(s.Username, s.Password) + } + return u.String() +} diff --git a/backend/vendor/github.com/wzshiming/socks5/udp.go b/backend/vendor/github.com/wzshiming/socks5/udp.go new file mode 100644 index 0000000..7420c89 --- /dev/null +++ b/backend/vendor/github.com/wzshiming/socks5/udp.go @@ -0,0 +1,174 @@ +package socks5 + +import ( + "bytes" + "errors" + "net" + "time" +) + +var ( + errBadHeader = errors.New("bad header") + errUnsupportedMethod = errors.New("unsupported method") +) + +type UDPConn struct { + bufRead [maxUdpPacket]byte + bufWrite [maxUdpPacket]byte + proxyAddress net.Addr + defaultTarget net.Addr + prefix []byte + net.PacketConn +} + +func NewUDPConn(raw net.PacketConn, proxyAddress net.Addr, defaultTarget net.Addr) (*UDPConn, error) { + conn := &UDPConn{ + PacketConn: raw, + proxyAddress: proxyAddress, + defaultTarget: defaultTarget, + prefix: []byte{0, 0, 0}, + } + return conn, nil +} + +// ReadFrom implements the net.PacketConn ReadFrom method. +func (c *UDPConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) { + n, addr, err = c.PacketConn.ReadFrom(c.bufRead[:]) + if err != nil { + return 0, nil, err + } + if n < len(c.prefix) || addr.String() != c.proxyAddress.String() { + return 0, nil, errBadHeader + } + buf := bytes.NewBuffer(c.bufRead[len(c.prefix):n]) + a, err := readAddr(buf) + if err != nil { + return 0, nil, err + } + n = copy(p, buf.Bytes()) + return n, a, nil +} + +// WriteTo implements the net.PacketConn WriteTo method. +func (c *UDPConn) WriteTo(p []byte, addr net.Addr) (n int, err error) { + buf := bytes.NewBuffer(c.bufWrite[:0]) + buf.Write(c.prefix) + err = writeAddrWithStr(buf, addr.String()) + if err != nil { + return 0, err + } + n, err = buf.Write(p) + if err != nil { + return 0, err + } + + data := buf.Bytes() + _, err = c.PacketConn.WriteTo(data, c.proxyAddress) + if err != nil { + return 0, err + } + return n, nil +} + +// Read implements the net.Conn Read method. +func (c *UDPConn) Read(b []byte) (int, error) { + n, addr, err := c.ReadFrom(b) + if err != nil { + return 0, err + } + if addr.String() != c.defaultTarget.String() { + return c.Read(b) + } + return n, nil +} + +// Write implements the net.Conn Write method. +func (c *UDPConn) Write(b []byte) (int, error) { + return c.WriteTo(b, c.defaultTarget) +} + +// RemoteAddr implements the net.Conn RemoteAddr method. +func (c *UDPConn) RemoteAddr() net.Addr { + return c.defaultTarget +} + +// SetReadBuffer implements the net.UDPConn SetReadBuffer method. +func (c *UDPConn) SetReadBuffer(bytes int) error { + udpConn, ok := c.PacketConn.(*net.UDPConn) + if !ok { + return errUnsupportedMethod + } + return udpConn.SetReadBuffer(bytes) +} + +// SetWriteBuffer implements the net.UDPConn SetWriteBuffer method. +func (c *UDPConn) SetWriteBuffer(bytes int) error { + udpConn, ok := c.PacketConn.(*net.UDPConn) + if !ok { + return errUnsupportedMethod + } + return udpConn.SetWriteBuffer(bytes) +} + +// SetDeadline implements the Conn SetDeadline method. +func (c *UDPConn) SetDeadline(t time.Time) error { + udpConn, ok := c.PacketConn.(*net.UDPConn) + if !ok { + return errUnsupportedMethod + } + return udpConn.SetDeadline(t) +} + +// SetReadDeadline implements the Conn SetReadDeadline method. +func (c *UDPConn) SetReadDeadline(t time.Time) error { + udpConn, ok := c.PacketConn.(*net.UDPConn) + if !ok { + return errUnsupportedMethod + } + return udpConn.SetReadDeadline(t) +} + +// SetWriteDeadline implements the Conn SetWriteDeadline method. +func (c *UDPConn) SetWriteDeadline(t time.Time) error { + udpConn, ok := c.PacketConn.(*net.UDPConn) + if !ok { + return errUnsupportedMethod + } + return udpConn.SetWriteDeadline(t) +} + +// ReadFromUDP implements the net.UDPConn ReadFromUDP method. +func (c *UDPConn) ReadFromUDP(b []byte) (n int, addr *net.UDPAddr, err error) { + udpConn, ok := c.PacketConn.(*net.UDPConn) + if !ok { + return 0, nil, errUnsupportedMethod + } + return udpConn.ReadFromUDP(b) +} + +// ReadMsgUDP implements the net.UDPConn ReadMsgUDP method. +func (c *UDPConn) ReadMsgUDP(b, oob []byte) (n, oobn, flags int, addr *net.UDPAddr, err error) { + udpConn, ok := c.PacketConn.(*net.UDPConn) + if !ok { + return 0, 0, 0, nil, errUnsupportedMethod + } + return udpConn.ReadMsgUDP(b, oob) +} + +// WriteToUDP implements the net.UDPConn WriteToUDP method. +func (c *UDPConn) WriteToUDP(b []byte, addr *net.UDPAddr) (int, error) { + udpConn, ok := c.PacketConn.(*net.UDPConn) + if !ok { + return 0, errUnsupportedMethod + } + return udpConn.WriteToUDP(b, addr) +} + +// WriteMsgUDP implements the net.UDPConn WriteMsgUDP method. +func (c *UDPConn) WriteMsgUDP(b, oob []byte, addr *net.UDPAddr) (n, oobn int, err error) { + udpConn, ok := c.PacketConn.(*net.UDPConn) + if !ok { + return 0, 0, errUnsupportedMethod + } + return udpConn.WriteMsgUDP(b, oob, addr) +} diff --git a/backend/vendor/github.com/wzshiming/socks5/udp_netip.go b/backend/vendor/github.com/wzshiming/socks5/udp_netip.go new file mode 100644 index 0000000..a0cf44f --- /dev/null +++ b/backend/vendor/github.com/wzshiming/socks5/udp_netip.go @@ -0,0 +1,45 @@ +//go:build go1.18 +// +build go1.18 + +package socks5 + +import ( + "net" + "net/netip" +) + +// ReadFromUDPAddrPort implements the net.UDPConn ReadFromUDPAddrPort method. +func (c *UDPConn) ReadFromUDPAddrPort(b []byte) (n int, addr netip.AddrPort, err error) { + udpConn, ok := c.PacketConn.(*net.UDPConn) + if !ok { + return 0, addr, errUnsupportedMethod + } + return udpConn.ReadFromUDPAddrPort(b) +} + +// ReadMsgUDPAddrPort implements the net.UDPConn ReadMsgUDPAddrPort method. +func (c *UDPConn) ReadMsgUDPAddrPort(b, oob []byte) (n, oobn, flags int, addr netip.AddrPort, err error) { + udpConn, ok := c.PacketConn.(*net.UDPConn) + if !ok { + return 0, 0, 0, addr, errUnsupportedMethod + } + return udpConn.ReadMsgUDPAddrPort(b, oob) +} + +// WriteToUDPAddrPort implements the net.UDPConn WriteToUDPAddrPort method. +func (c *UDPConn) WriteToUDPAddrPort(b []byte, addr netip.AddrPort) (int, error) { + udpConn, ok := c.PacketConn.(*net.UDPConn) + if !ok { + return 0, errUnsupportedMethod + } + return udpConn.WriteToUDPAddrPort(b, addr) +} + +// WriteMsgUDPAddrPort implements the net.UDPConn WriteMsgUDPAddrPort method. +func (c *UDPConn) WriteMsgUDPAddrPort(b, oob []byte, addr netip.AddrPort) (n, oobn int, err error) { + udpConn, ok := c.PacketConn.(*net.UDPConn) + if !ok { + return 0, 0, errUnsupportedMethod + } + return udpConn.WriteMsgUDPAddrPort(b, oob, addr) +} diff --git a/backend/vendor/go.uber.org/mock/AUTHORS b/backend/vendor/go.uber.org/mock/AUTHORS new file mode 100644 index 0000000..660b8cc --- /dev/null +++ b/backend/vendor/go.uber.org/mock/AUTHORS @@ -0,0 +1,12 @@ +# This is the official list of GoMock authors for copyright purposes. +# This file is distinct from the CONTRIBUTORS files. +# See the latter for an explanation. + +# Names should be added to this file as +# Name or Organization +# The email address is not required for organizations. + +# Please keep the list sorted. + +Alex Reece +Google Inc. diff --git a/backend/vendor/go.uber.org/mock/LICENSE b/backend/vendor/go.uber.org/mock/LICENSE new file mode 100644 index 0000000..d645695 --- /dev/null +++ b/backend/vendor/go.uber.org/mock/LICENSE @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. 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If You + institute patent litigation against any entity (including a + cross-claim or counterclaim in a lawsuit) alleging that the Work + or a Contribution incorporated within the Work constitutes direct + or contributory patent infringement, then any patent licenses + granted to You under this License for that Work shall terminate + as of the date such litigation is filed. + + 4. Redistribution. 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In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + APPENDIX: How to apply the Apache License to your work. + + To apply the Apache License to your work, attach the following + boilerplate notice, with the fields enclosed by brackets "[]" + replaced with your own identifying information. (Don't include + the brackets!) The text should be enclosed in the appropriate + comment syntax for the file format. We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/backend/vendor/go.uber.org/mock/mockgen/archive.go b/backend/vendor/go.uber.org/mock/mockgen/archive.go new file mode 100644 index 0000000..bc80ad1 --- /dev/null +++ b/backend/vendor/go.uber.org/mock/mockgen/archive.go @@ -0,0 +1,55 @@ +package main + +import ( + "fmt" + "go/token" + "go/types" + "os" + + "go.uber.org/mock/mockgen/model" + + "golang.org/x/tools/go/gcexportdata" +) + +func archiveMode(importPath string, symbols []string, archive string) (*model.Package, error) { + f, err := os.Open(archive) + if err != nil { + return nil, err + } + defer f.Close() + r, err := gcexportdata.NewReader(f) + if err != nil { + return nil, fmt.Errorf("read export data %q: %v", archive, err) + } + + fset := token.NewFileSet() + imports := make(map[string]*types.Package) + tp, err := gcexportdata.Read(r, fset, imports, importPath) + if err != nil { + return nil, err + } + + pkg := &model.Package{ + Name: tp.Name(), + PkgPath: tp.Path(), + Interfaces: make([]*model.Interface, 0, len(symbols)), + } + for _, name := range symbols { + m := tp.Scope().Lookup(name) + tn, ok := m.(*types.TypeName) + if !ok { + continue + } + ti, ok := tn.Type().Underlying().(*types.Interface) + if !ok { + continue + } + it, err := model.InterfaceFromGoTypesType(ti) + if err != nil { + return nil, err + } + it.Name = m.Name() + pkg.Interfaces = append(pkg.Interfaces, it) + } + return pkg, nil +} diff --git a/backend/vendor/go.uber.org/mock/mockgen/deprecated.go b/backend/vendor/go.uber.org/mock/mockgen/deprecated.go new file mode 100644 index 0000000..0b45a2e --- /dev/null +++ b/backend/vendor/go.uber.org/mock/mockgen/deprecated.go @@ -0,0 +1,41 @@ +package main + +import ( + "flag" + "log" + "os" +) + +const ( + deprecatedFlagProgOnly = "prog_only" + deprecatedFlagExecOnly = "exec_only" +) + +var ( + _ = flag.Bool("prog_only", false, "DEPRECATED (reflect mode) Only generate the reflection program; write it to stdout and exit.") + _ = flag.String("exec_only", "", "DEPRECATED (reflect mode) If set, execute this reflection program.") +) + +// notifyAboutDeprecatedFlags prints a warning message for a deprecated flags if they are set. +func notifyAboutDeprecatedFlags() { + const resetColorPostfix = "\033[0m" + logger := initWarningLogger() + + flag.Visit(func(f *flag.Flag) { + switch f.Name { + case deprecatedFlagProgOnly: + logger.Println("The -prog_only flag is deprecated and has no effect.", resetColorPostfix) + case deprecatedFlagExecOnly: + logger.Println("The -exec_only flag is deprecated and has no effect.", resetColorPostfix) + } + }) +} + +func initWarningLogger() *log.Logger { + const ( + yellowColor = "\033[33m" + warningPrefix = yellowColor + "WARNING: " + ) + + return log.New(os.Stdout, warningPrefix, log.Ldate|log.Ltime) +} diff --git a/backend/vendor/go.uber.org/mock/mockgen/generic.go b/backend/vendor/go.uber.org/mock/mockgen/generic.go new file mode 100644 index 0000000..c2289c2 --- /dev/null +++ b/backend/vendor/go.uber.org/mock/mockgen/generic.go @@ -0,0 +1,103 @@ +// Copyright 2022 Google LLC +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// See the License for the specific language governing permissions and +// limitations under the License. + +package main + +import ( + "errors" + "fmt" + "go/ast" + "go/token" + + "go.uber.org/mock/mockgen/model" +) + +func getTypeSpecTypeParams(ts *ast.TypeSpec) []*ast.Field { + if ts == nil || ts.TypeParams == nil { + return nil + } + return ts.TypeParams.List +} + +func (p *fileParser) parseGenericType(pkg string, typ ast.Expr, tps map[string]model.Type) (model.Type, error) { + switch v := typ.(type) { + case *ast.IndexExpr: + m, err := p.parseType(pkg, v.X, tps) + if err != nil { + return nil, err + } + nm, ok := m.(*model.NamedType) + if !ok { + return m, nil + } + t, err := p.parseType(pkg, v.Index, tps) + if err != nil { + return nil, err + } + nm.TypeParams = &model.TypeParametersType{TypeParameters: []model.Type{t}} + return m, nil + case *ast.IndexListExpr: + m, err := p.parseType(pkg, v.X, tps) + if err != nil { + return nil, err + } + nm, ok := m.(*model.NamedType) + if !ok { + return m, nil + } + var ts []model.Type + for _, expr := range v.Indices { + t, err := p.parseType(pkg, expr, tps) + if err != nil { + return nil, err + } + ts = append(ts, t) + } + nm.TypeParams = &model.TypeParametersType{TypeParameters: ts} + return m, nil + } + return nil, nil +} + +func (p *fileParser) parseGenericMethod(field *ast.Field, it *namedInterface, iface *model.Interface, pkg string, tps map[string]model.Type) ([]*model.Method, error) { + var indices []ast.Expr + var typ ast.Expr + switch v := field.Type.(type) { + case *ast.IndexExpr: + indices = []ast.Expr{v.Index} + typ = v.X + case *ast.IndexListExpr: + indices = v.Indices + typ = v.X + case *ast.UnaryExpr: + if v.Op == token.TILDE { + return nil, errConstraintInterface + } + return nil, fmt.Errorf("~T may only appear as constraint for %T", field.Type) + case *ast.BinaryExpr: + if v.Op == token.OR { + return nil, errConstraintInterface + } + return nil, fmt.Errorf("A|B may only appear as constraint for %T", field.Type) + default: + return nil, fmt.Errorf("don't know how to mock method of type %T", field.Type) + } + + nf := &ast.Field{ + Doc: field.Comment, + Names: field.Names, + Type: typ, + Tag: field.Tag, + Comment: field.Comment, + } + + it.embeddedInstTypeParams = indices + + return p.parseMethod(nf, it, iface, pkg, tps) +} + +var errConstraintInterface = errors.New("interface contains constraints") diff --git a/backend/vendor/go.uber.org/mock/mockgen/gob.go b/backend/vendor/go.uber.org/mock/mockgen/gob.go new file mode 100644 index 0000000..b5ab066 --- /dev/null +++ b/backend/vendor/go.uber.org/mock/mockgen/gob.go @@ -0,0 +1,21 @@ +package main + +import ( + "encoding/gob" + "os" + + "go.uber.org/mock/mockgen/model" +) + +func gobMode(path string) (*model.Package, error) { + in, err := os.Open(path) + if err != nil { + return nil, err + } + defer in.Close() + var pkg model.Package + if err := gob.NewDecoder(in).Decode(&pkg); err != nil { + return nil, err + } + return &pkg, nil +} diff --git a/backend/vendor/go.uber.org/mock/mockgen/mockgen.go b/backend/vendor/go.uber.org/mock/mockgen/mockgen.go new file mode 100644 index 0000000..d3d92ba --- /dev/null +++ b/backend/vendor/go.uber.org/mock/mockgen/mockgen.go @@ -0,0 +1,945 @@ +// Copyright 2010 Google Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// MockGen generates mock implementations of Go interfaces. +package main + +// TODO: This does not support recursive embedded interfaces. +// TODO: This does not support embedding package-local interfaces in a separate file. + +import ( + "bytes" + "encoding/json" + "errors" + "flag" + "fmt" + "go/token" + "io" + "log" + "os" + "os/exec" + "path" + "path/filepath" + "runtime" + "sort" + "strconv" + "strings" + "unicode" + + "golang.org/x/mod/modfile" + toolsimports "golang.org/x/tools/imports" + + "go.uber.org/mock/mockgen/model" +) + +const ( + gomockImportPath = "go.uber.org/mock/gomock" +) + +var ( + version = "" + commit = "none" + date = "unknown" +) + +var ( + archive = flag.String("archive", "", "(archive mode) Input Go archive file; enables archive mode.") + source = flag.String("source", "", "(source mode) Input Go source file; enables source mode.") + destination = flag.String("destination", "", "Output file; defaults to stdout.") + mockNames = flag.String("mock_names", "", "Comma-separated interfaceName=mockName pairs of explicit mock names to use. Mock names default to 'Mock'+ interfaceName suffix.") + packageOut = flag.String("package", "", "Package of the generated code; defaults to the package of the input with a 'mock_' prefix.") + selfPackage = flag.String("self_package", "", "The full package import path for the generated code. The purpose of this flag is to prevent import cycles in the generated code by trying to include its own package. This can happen if the mock's package is set to one of its inputs (usually the main one) and the output is stdio so mockgen cannot detect the final output package. Setting this flag will then tell mockgen which import to exclude.") + writeCmdComment = flag.Bool("write_command_comment", true, "Writes the command used as a comment if true.") + writePkgComment = flag.Bool("write_package_comment", true, "Writes package documentation comment (godoc) if true.") + writeSourceComment = flag.Bool("write_source_comment", true, "Writes original file (source mode) or interface names (package mode) comment if true.") + writeGenerateDirective = flag.Bool("write_generate_directive", false, "Add //go:generate directive to regenerate the mock") + copyrightFile = flag.String("copyright_file", "", "Copyright file used to add copyright header") + buildConstraint = flag.String("build_constraint", "", "If non-empty, added as //go:build ") + typed = flag.Bool("typed", false, "Generate Type-safe 'Return', 'Do', 'DoAndReturn' function") + imports = flag.String("imports", "", "(source mode) Comma-separated name=path pairs of explicit imports to use.") + auxFiles = flag.String("aux_files", "", "(source mode) Comma-separated pkg=path pairs of auxiliary Go source files.") + modelGob = flag.String("model_gob", "", "Skip package/source loading entirely and use the gob encoded model.Package at the given path") + excludeInterfaces = flag.String("exclude_interfaces", "", "Comma-separated names of interfaces to be excluded") + debugParser = flag.Bool("debug_parser", false, "Print out parser results only.") + showVersion = flag.Bool("version", false, "Print version.") +) + +func main() { + flag.Usage = usage + flag.Parse() + + notifyAboutDeprecatedFlags() + + if *showVersion { + printVersion() + return + } + + var pkg *model.Package + var err error + var packageName string + + // Switch between modes + switch { + case *modelGob != "": // gob mode + pkg, err = gobMode(*modelGob) + case *source != "": // source mode + pkg, err = sourceMode(*source) + case *archive != "": // archive mode + checkArgs() + packageName = flag.Arg(0) + interfaces := strings.Split(flag.Arg(1), ",") + pkg, err = archiveMode(packageName, interfaces, *archive) + + default: // package mode + checkArgs() + packageName = flag.Arg(0) + interfaces := strings.Split(flag.Arg(1), ",") + + if packageName == "." { + dir, err := os.Getwd() + if err != nil { + log.Fatalf("Get current directory failed: %v", err) + } + packageName, err = packageNameOfDir(dir) + if err != nil { + log.Fatalf("Parse package name failed: %v", err) + } + + } + parser := packageModeParser{} + pkg, err = parser.parsePackage(packageName, interfaces) + } + + if err != nil { + log.Fatalf("Loading input failed: %v", err) + } + + if *debugParser { + pkg.Print(os.Stdout) + return + } + + outputPackageName := *packageOut + if outputPackageName == "" { + // pkg.Name in package mode is the base name of the import path, + // which might have characters that are illegal to have in package names. + outputPackageName = "mock_" + sanitize(pkg.Name) + } + + // outputPackagePath represents the fully qualified name of the package of + // the generated code. Its purposes are to prevent the module from importing + // itself and to prevent qualifying type names that come from its own + // package (i.e. if there is a type called X then we want to print "X" not + // "package.X" since "package" is this package). This can happen if the mock + // is output into an already existing package. + outputPackagePath := *selfPackage + if outputPackagePath == "" && *destination != "" { + dstPath, err := filepath.Abs(filepath.Dir(*destination)) + if err == nil { + pkgPath, err := parsePackageImport(dstPath) + if err == nil { + outputPackagePath = pkgPath + } else { + log.Println("Unable to infer -self_package from destination file path:", err) + } + } else { + log.Println("Unable to determine destination file path:", err) + } + } + + g := &generator{ + buildConstraint: *buildConstraint, + } + if *source != "" { + g.filename = *source + } else if *archive != "" { + g.filename = *archive + } else { + g.srcPackage = packageName + g.srcInterfaces = flag.Arg(1) + } + g.destination = *destination + + if *mockNames != "" { + g.mockNames = parseMockNames(*mockNames) + } + if *copyrightFile != "" { + header, err := os.ReadFile(*copyrightFile) + if err != nil { + log.Fatalf("Failed reading copyright file: %v", err) + } + + g.copyrightHeader = string(header) + } + if err := g.Generate(pkg, outputPackageName, outputPackagePath); err != nil { + log.Fatalf("Failed generating mock: %v", err) + } + output := g.Output() + dst := os.Stdout + if len(*destination) > 0 { + if err := os.MkdirAll(filepath.Dir(*destination), os.ModePerm); err != nil { + log.Fatalf("Unable to create directory: %v", err) + } + existing, err := os.ReadFile(*destination) + if err != nil && !errors.Is(err, os.ErrNotExist) { + log.Fatalf("Failed reading pre-exiting destination file: %v", err) + } + if len(existing) == len(output) && bytes.Equal(existing, output) { + return + } + f, err := os.Create(*destination) + if err != nil { + log.Fatalf("Failed opening destination file: %v", err) + } + defer f.Close() + dst = f + } + if _, err := dst.Write(output); err != nil { + log.Fatalf("Failed writing to destination: %v", err) + } +} + +func parseMockNames(names string) map[string]string { + mocksMap := make(map[string]string) + for _, kv := range strings.Split(names, ",") { + parts := strings.SplitN(kv, "=", 2) + if len(parts) != 2 || parts[1] == "" { + log.Fatalf("bad mock names spec: %v", kv) + } + mocksMap[parts[0]] = parts[1] + } + return mocksMap +} + +func parseExcludeInterfaces(names string) map[string]struct{} { + splitNames := strings.Split(names, ",") + namesSet := make(map[string]struct{}, len(splitNames)) + for _, name := range splitNames { + if name == "" { + continue + } + + namesSet[name] = struct{}{} + } + + if len(namesSet) == 0 { + return nil + } + + return namesSet +} + +func checkArgs() { + if flag.NArg() != 2 { + usage() + log.Fatal("Expected exactly two arguments") + } +} + +func usage() { + _, _ = io.WriteString(os.Stderr, usageText) + flag.PrintDefaults() +} + +const usageText = `mockgen has three modes of operation: archive, source and package. + +Source mode generates mock interfaces from a source file. +It is enabled by using the -source flag. Other flags that +may be useful in this mode are -imports, -aux_files and -exclude_interfaces. +Example: + mockgen -source=foo.go [other options] + +Package mode works by specifying the package and interface names. +It is enabled by passing two non-flag arguments: an import path, and a +comma-separated list of symbols. +You can use "." to refer to the current path's package. +Example: + mockgen database/sql/driver Conn,Driver + mockgen . SomeInterface + +Archive mode generates mock interfaces from a package archive +file (.a). It is enabled by using the -archive flag and two +non-flag arguments: an import path, and a comma-separated +list of symbols. +Example: + mockgen -archive=pkg.a database/sql/driver Conn,Driver + +` + +type generator struct { + buf bytes.Buffer + indent string + mockNames map[string]string // may be empty + filename string // may be empty + destination string // may be empty + srcPackage, srcInterfaces string // may be empty + copyrightHeader string + buildConstraint string // may be empty + + packageMap map[string]string // map from import path to package name +} + +func (g *generator) p(format string, args ...any) { + _, _ = fmt.Fprintf(&g.buf, g.indent+format+"\n", args...) +} + +func (g *generator) in() { + g.indent += "\t" +} + +func (g *generator) out() { + if len(g.indent) > 0 { + g.indent = g.indent[0 : len(g.indent)-1] + } +} + +// sanitize cleans up a string to make a suitable package name. +func sanitize(s string) string { + t := "" + for _, r := range s { + if t == "" { + if unicode.IsLetter(r) || r == '_' { + t += string(r) + continue + } + } else { + if unicode.IsLetter(r) || unicode.IsDigit(r) || r == '_' { + t += string(r) + continue + } + } + t += "_" + } + if t == "_" { + t = "x" + } + return t +} + +func (g *generator) Generate(pkg *model.Package, outputPkgName string, outputPackagePath string) error { + if outputPkgName != pkg.Name && *selfPackage == "" { + // reset outputPackagePath if it's not passed in through -self_package + outputPackagePath = "" + } + + if g.copyrightHeader != "" { + lines := strings.Split(g.copyrightHeader, "\n") + for _, line := range lines { + g.p("// %s", line) + } + g.p("") + } + + if g.buildConstraint != "" { + g.p("//go:build %s", g.buildConstraint) + // https://pkg.go.dev/cmd/go#hdr-Build_constraints:~:text=a%20build%20constraint%20should%20be%20followed%20by%20a%20blank%20line + g.p("") + } + + g.p("// Code generated by MockGen. DO NOT EDIT.") + if *writeSourceComment { + if g.filename != "" { + g.p("// Source: %v", g.filename) + } else { + g.p("// Source: %v (interfaces: %v)", g.srcPackage, g.srcInterfaces) + } + } + if *writeCmdComment { + g.p("//") + g.p("// Generated by this command:") + g.p("//") + // only log the name of the executable, not the full path + name := filepath.Base(os.Args[0]) + if runtime.GOOS == "windows" { + name = strings.TrimSuffix(name, ".exe") + } + g.p("//\t%v", strings.Join(append([]string{name}, os.Args[1:]...), " ")) + g.p("//") + } + + // Get all required imports, and generate unique names for them all. + im := pkg.Imports() + im[gomockImportPath] = true + + // Only import reflect if it's used. We only use reflect in mocked methods + // so only import if any of the mocked interfaces have methods. + for _, intf := range pkg.Interfaces { + if len(intf.Methods) > 0 { + im["reflect"] = true + break + } + } + + // Sort keys to make import alias generation predictable + sortedPaths := make([]string, len(im)) + x := 0 + for pth := range im { + sortedPaths[x] = pth + x++ + } + sort.Strings(sortedPaths) + + packagesName := createPackageMap(sortedPaths) + + definedImports := make(map[string]string, len(im)) + if *imports != "" { + for _, kv := range strings.Split(*imports, ",") { + eq := strings.Index(kv, "=") + if k, v := kv[:eq], kv[eq+1:]; k != "." { + definedImports[v] = k + } + } + } + + g.packageMap = make(map[string]string, len(im)) + localNames := make(map[string]bool, len(im)) + for _, pth := range sortedPaths { + base, ok := packagesName[pth] + if !ok { + base = sanitize(path.Base(pth)) + } + + // Local names for an imported package can usually be the basename of the import path. + // A couple of situations don't permit that, such as duplicate local names + // (e.g. importing "html/template" and "text/template"), or where the basename is + // a keyword (e.g. "foo/case") or when defining a name for that by using the -imports flag. + // try base0, base1, ... + pkgName := base + + if _, ok := definedImports[pth]; ok { + pkgName = definedImports[pth] + } + + i := 0 + for localNames[pkgName] || token.Lookup(pkgName).IsKeyword() || pkgName == "any" { + pkgName = base + strconv.Itoa(i) + i++ + } + + // Avoid importing package if source pkg == output pkg + if pth == pkg.PkgPath && outputPackagePath == pkg.PkgPath { + continue + } + + g.packageMap[pth] = pkgName + localNames[pkgName] = true + } + + // Ensure there is an empty line between “generated by” block and + // package documentation comments to follow the recommendations: + // https://go.dev/wiki/CodeReviewComments#package-comments + // That is, “generated by” should not be a package comment. + g.p("") + + if *writePkgComment { + g.p("// Package %v is a generated GoMock package.", outputPkgName) + } + g.p("package %v", outputPkgName) + g.p("") + g.p("import (") + g.in() + for pkgPath, pkgName := range g.packageMap { + if pkgPath == outputPackagePath { + continue + } + g.p("%v %q", pkgName, pkgPath) + } + for _, pkgPath := range pkg.DotImports { + g.p(". %q", pkgPath) + } + g.out() + g.p(")") + + if *writeGenerateDirective { + g.p("//go:generate %v", strings.Join(os.Args, " ")) + } + + for _, intf := range pkg.Interfaces { + if err := g.GenerateMockInterface(intf, outputPackagePath); err != nil { + return err + } + } + + return nil +} + +// The name of the mock type to use for the given interface identifier. +func (g *generator) mockName(typeName string) string { + if mockName, ok := g.mockNames[typeName]; ok { + return mockName + } + + return "Mock" + typeName +} + +// formattedTypeParams returns a long and short form of type param info used for +// printing. If analyzing a interface with type param [I any, O any] the result +// will be: +// "[I any, O any]", "[I, O]" +func (g *generator) formattedTypeParams(it *model.Interface, pkgOverride string) (string, string) { + if len(it.TypeParams) == 0 { + return "", "" + } + var long, short strings.Builder + long.WriteString("[") + short.WriteString("[") + for i, v := range it.TypeParams { + if i != 0 { + long.WriteString(", ") + short.WriteString(", ") + } + long.WriteString(v.Name) + short.WriteString(v.Name) + long.WriteString(fmt.Sprintf(" %s", v.Type.String(g.packageMap, pkgOverride))) + } + long.WriteString("]") + short.WriteString("]") + return long.String(), short.String() +} + +func (g *generator) GenerateMockInterface(intf *model.Interface, outputPackagePath string) error { + mockType := g.mockName(intf.Name) + longTp, shortTp := g.formattedTypeParams(intf, outputPackagePath) + + g.p("") + g.p("// %v is a mock of %v interface.", mockType, intf.Name) + g.p("type %v%v struct {", mockType, longTp) + g.in() + g.p("ctrl *gomock.Controller") + g.p("recorder *%vMockRecorder%v", mockType, shortTp) + g.p("isgomock struct{}") + g.out() + g.p("}") + g.p("") + + g.p("// %vMockRecorder is the mock recorder for %v.", mockType, mockType) + g.p("type %vMockRecorder%v struct {", mockType, longTp) + g.in() + g.p("mock *%v%v", mockType, shortTp) + g.out() + g.p("}") + g.p("") + + g.p("// New%v creates a new mock instance.", mockType) + g.p("func New%v%v(ctrl *gomock.Controller) *%v%v {", mockType, longTp, mockType, shortTp) + g.in() + g.p("mock := &%v%v{ctrl: ctrl}", mockType, shortTp) + g.p("mock.recorder = &%vMockRecorder%v{mock}", mockType, shortTp) + g.p("return mock") + g.out() + g.p("}") + g.p("") + + // XXX: possible name collision here if someone has EXPECT in their interface. + g.p("// EXPECT returns an object that allows the caller to indicate expected use.") + g.p("func (m *%v%v) EXPECT() *%vMockRecorder%v {", mockType, shortTp, mockType, shortTp) + g.in() + g.p("return m.recorder") + g.out() + g.p("}") + + g.GenerateMockMethods(mockType, intf, outputPackagePath, longTp, shortTp, *typed) + + return nil +} + +type byMethodName []*model.Method + +func (b byMethodName) Len() int { return len(b) } +func (b byMethodName) Swap(i, j int) { b[i], b[j] = b[j], b[i] } +func (b byMethodName) Less(i, j int) bool { return b[i].Name < b[j].Name } + +func (g *generator) GenerateMockMethods(mockType string, intf *model.Interface, pkgOverride, longTp, shortTp string, typed bool) { + sort.Sort(byMethodName(intf.Methods)) + for _, m := range intf.Methods { + g.p("") + _ = g.GenerateMockMethod(mockType, m, pkgOverride, shortTp) + g.p("") + _ = g.GenerateMockRecorderMethod(intf, m, shortTp, typed) + if typed { + g.p("") + _ = g.GenerateMockReturnCallMethod(intf, m, pkgOverride, longTp, shortTp) + } + } +} + +func makeArgString(argNames, argTypes []string) string { + args := make([]string, len(argNames)) + for i, name := range argNames { + // specify the type only once for consecutive args of the same type + if i+1 < len(argTypes) && argTypes[i] == argTypes[i+1] { + args[i] = name + } else { + args[i] = name + " " + argTypes[i] + } + } + return strings.Join(args, ", ") +} + +// GenerateMockMethod generates a mock method implementation. +// If non-empty, pkgOverride is the package in which unqualified types reside. +func (g *generator) GenerateMockMethod(mockType string, m *model.Method, pkgOverride, shortTp string) error { + argNames := g.getArgNames(m, true /* in */) + argTypes := g.getArgTypes(m, pkgOverride, true /* in */) + argString := makeArgString(argNames, argTypes) + + rets := make([]string, len(m.Out)) + for i, p := range m.Out { + rets[i] = p.Type.String(g.packageMap, pkgOverride) + } + retString := strings.Join(rets, ", ") + if len(rets) > 1 { + retString = "(" + retString + ")" + } + if retString != "" { + retString = " " + retString + } + + ia := newIdentifierAllocator(argNames) + idRecv := ia.allocateIdentifier("m") + + g.p("// %v mocks base method.", m.Name) + g.p("func (%v *%v%v) %v(%v)%v {", idRecv, mockType, shortTp, m.Name, argString, retString) + g.in() + g.p("%s.ctrl.T.Helper()", idRecv) + + var callArgs string + if m.Variadic == nil { + if len(argNames) > 0 { + callArgs = ", " + strings.Join(argNames, ", ") + } + } else { + // Non-trivial. The generated code must build a []any, + // but the variadic argument may be any type. + idVarArgs := ia.allocateIdentifier("varargs") + idVArg := ia.allocateIdentifier("a") + g.p("%s := []any{%s}", idVarArgs, strings.Join(argNames[:len(argNames)-1], ", ")) + g.p("for _, %s := range %s {", idVArg, argNames[len(argNames)-1]) + g.in() + g.p("%s = append(%s, %s)", idVarArgs, idVarArgs, idVArg) + g.out() + g.p("}") + callArgs = ", " + idVarArgs + "..." + } + if len(m.Out) == 0 { + g.p(`%v.ctrl.Call(%v, %q%v)`, idRecv, idRecv, m.Name, callArgs) + } else { + idRet := ia.allocateIdentifier("ret") + g.p(`%v := %v.ctrl.Call(%v, %q%v)`, idRet, idRecv, idRecv, m.Name, callArgs) + + // Go does not allow "naked" type assertions on nil values, so we use the two-value form here. + // The value of that is either (x.(T), true) or (Z, false), where Z is the zero value for T. + // Happily, this coincides with the semantics we want here. + retNames := make([]string, len(rets)) + for i, t := range rets { + retNames[i] = ia.allocateIdentifier(fmt.Sprintf("ret%d", i)) + g.p("%s, _ := %s[%d].(%s)", retNames[i], idRet, i, t) + } + g.p("return " + strings.Join(retNames, ", ")) + } + + g.out() + g.p("}") + return nil +} + +func (g *generator) GenerateMockRecorderMethod(intf *model.Interface, m *model.Method, shortTp string, typed bool) error { + mockType := g.mockName(intf.Name) + argNames := g.getArgNames(m, true) + + var argString string + if m.Variadic == nil { + argString = strings.Join(argNames, ", ") + } else { + argString = strings.Join(argNames[:len(argNames)-1], ", ") + } + if argString != "" { + argString += " any" + } + + if m.Variadic != nil { + if argString != "" { + argString += ", " + } + argString += fmt.Sprintf("%s ...any", argNames[len(argNames)-1]) + } + + ia := newIdentifierAllocator(argNames) + idRecv := ia.allocateIdentifier("mr") + + g.p("// %v indicates an expected call of %v.", m.Name, m.Name) + if typed { + g.p("func (%s *%vMockRecorder%v) %v(%v) *%s%sCall%s {", idRecv, mockType, shortTp, m.Name, argString, mockType, m.Name, shortTp) + } else { + g.p("func (%s *%vMockRecorder%v) %v(%v) *gomock.Call {", idRecv, mockType, shortTp, m.Name, argString) + } + + g.in() + g.p("%s.mock.ctrl.T.Helper()", idRecv) + + var callArgs string + if m.Variadic == nil { + if len(argNames) > 0 { + callArgs = ", " + strings.Join(argNames, ", ") + } + } else { + if len(argNames) == 1 { + // Easy: just use ... to push the arguments through. + callArgs = ", " + argNames[0] + "..." + } else { + // Hard: create a temporary slice. + idVarArgs := ia.allocateIdentifier("varargs") + g.p("%s := append([]any{%s}, %s...)", + idVarArgs, + strings.Join(argNames[:len(argNames)-1], ", "), + argNames[len(argNames)-1]) + callArgs = ", " + idVarArgs + "..." + } + } + if typed { + g.p(`call := %s.mock.ctrl.RecordCallWithMethodType(%s.mock, "%s", reflect.TypeOf((*%s%s)(nil).%s)%s)`, idRecv, idRecv, m.Name, mockType, shortTp, m.Name, callArgs) + g.p(`return &%s%sCall%s{Call: call}`, mockType, m.Name, shortTp) + } else { + g.p(`return %s.mock.ctrl.RecordCallWithMethodType(%s.mock, "%s", reflect.TypeOf((*%s%s)(nil).%s)%s)`, idRecv, idRecv, m.Name, mockType, shortTp, m.Name, callArgs) + } + + g.out() + g.p("}") + return nil +} + +func (g *generator) GenerateMockReturnCallMethod(intf *model.Interface, m *model.Method, pkgOverride, longTp, shortTp string) error { + mockType := g.mockName(intf.Name) + argNames := g.getArgNames(m, true /* in */) + retNames := g.getArgNames(m, false /* out */) + argTypes := g.getArgTypes(m, pkgOverride, true /* in */) + retTypes := g.getArgTypes(m, pkgOverride, false /* out */) + argString := strings.Join(argTypes, ", ") + + rets := make([]string, len(m.Out)) + for i, p := range m.Out { + rets[i] = p.Type.String(g.packageMap, pkgOverride) + } + + var retString string + switch { + case len(rets) == 1: + retString = " " + rets[0] + case len(rets) > 1: + retString = " (" + strings.Join(rets, ", ") + ")" + } + + ia := newIdentifierAllocator(argNames) + idRecv := ia.allocateIdentifier("c") + + recvStructName := mockType + m.Name + + g.p("// %s%sCall wrap *gomock.Call", mockType, m.Name) + g.p("type %s%sCall%s struct{", mockType, m.Name, longTp) + g.in() + g.p("*gomock.Call") + g.out() + g.p("}") + + g.p("// Return rewrite *gomock.Call.Return") + g.p("func (%s *%sCall%s) Return(%v) *%sCall%s {", idRecv, recvStructName, shortTp, makeArgString(retNames, retTypes), recvStructName, shortTp) + g.in() + var retArgs string + if len(retNames) > 0 { + retArgs = strings.Join(retNames, ", ") + } + g.p(`%s.Call = %v.Call.Return(%v)`, idRecv, idRecv, retArgs) + g.p("return %s", idRecv) + g.out() + g.p("}") + + g.p("// Do rewrite *gomock.Call.Do") + g.p("func (%s *%sCall%s) Do(f func(%v)%v) *%sCall%s {", idRecv, recvStructName, shortTp, argString, retString, recvStructName, shortTp) + g.in() + g.p(`%s.Call = %v.Call.Do(f)`, idRecv, idRecv) + g.p("return %s", idRecv) + g.out() + g.p("}") + + g.p("// DoAndReturn rewrite *gomock.Call.DoAndReturn") + g.p("func (%s *%sCall%s) DoAndReturn(f func(%v)%v) *%sCall%s {", idRecv, recvStructName, shortTp, argString, retString, recvStructName, shortTp) + g.in() + g.p(`%s.Call = %v.Call.DoAndReturn(f)`, idRecv, idRecv) + g.p("return %s", idRecv) + g.out() + g.p("}") + return nil +} + +// nameExistsAsPackage returns true if the name exists as a package name. +// This is used to avoid name collisions when generating mock method arguments. +func (g *generator) nameExistsAsPackage(name string) bool { + for _, symbolName := range g.packageMap { + if symbolName == name { + return true + } + } + return false +} + +func (g *generator) getArgNames(m *model.Method, in bool) []string { + var params []*model.Parameter + if in { + params = m.In + } else { + params = m.Out + } + argNames := make([]string, len(params)) + + for i, p := range params { + name := p.Name + + if name == "" || name == "_" || g.nameExistsAsPackage(name) { + name = fmt.Sprintf("arg%d", i) + } + argNames[i] = name + } + if m.Variadic != nil && in { + name := m.Variadic.Name + + if name == "" || g.nameExistsAsPackage(name) { + name = fmt.Sprintf("arg%d", len(params)) + } + argNames = append(argNames, name) + } + return argNames +} + +func (g *generator) getArgTypes(m *model.Method, pkgOverride string, in bool) []string { + var params []*model.Parameter + if in { + params = m.In + } else { + params = m.Out + } + argTypes := make([]string, len(params)) + for i, p := range params { + argTypes[i] = p.Type.String(g.packageMap, pkgOverride) + } + if m.Variadic != nil { + argTypes = append(argTypes, "..."+m.Variadic.Type.String(g.packageMap, pkgOverride)) + } + return argTypes +} + +type identifierAllocator map[string]struct{} + +func newIdentifierAllocator(taken []string) identifierAllocator { + a := make(identifierAllocator, len(taken)) + for _, s := range taken { + a[s] = struct{}{} + } + return a +} + +func (o identifierAllocator) allocateIdentifier(want string) string { + id := want + for i := 2; ; i++ { + if _, ok := o[id]; !ok { + o[id] = struct{}{} + return id + } + id = want + "_" + strconv.Itoa(i) + } +} + +// Output returns the generator's output, formatted in the standard Go style. +func (g *generator) Output() []byte { + src, err := toolsimports.Process(g.destination, g.buf.Bytes(), nil) + if err != nil { + log.Fatalf("Failed to format generated source code: %s\n%s", err, g.buf.String()) + } + return src +} + +// createPackageMap returns a map of import path to package name +// for specified importPaths. +func createPackageMap(importPaths []string) map[string]string { + var pkg struct { + Name string + ImportPath string + } + pkgMap := make(map[string]string) + b := bytes.NewBuffer(nil) + args := []string{"list", "-json=ImportPath,Name"} + args = append(args, importPaths...) + cmd := exec.Command("go", args...) + cmd.Stdout = b + cmd.Run() + dec := json.NewDecoder(b) + for dec.More() { + err := dec.Decode(&pkg) + if err != nil { + log.Printf("failed to decode 'go list' output: %v", err) + continue + } + pkgMap[pkg.ImportPath] = pkg.Name + } + return pkgMap +} + +func printVersion() { + if version != "" { + fmt.Printf("v%s\nCommit: %s\nDate: %s\n", version, commit, date) + } else { + printModuleVersion() + } +} + +// parseImportPackage get package import path via source file +// an alternative implementation is to use: +// cfg := &packages.Config{Mode: packages.NeedName, Tests: true, Dir: srcDir} +// pkgs, err := packages.Load(cfg, "file="+source) +// However, it will call "go list" and slow down the performance +func parsePackageImport(srcDir string) (string, error) { + moduleMode := os.Getenv("GO111MODULE") + // trying to find the module + if moduleMode != "off" { + currentDir := srcDir + for { + dat, err := os.ReadFile(filepath.Join(currentDir, "go.mod")) + if os.IsNotExist(err) { + if currentDir == filepath.Dir(currentDir) { + // at the root + break + } + currentDir = filepath.Dir(currentDir) + continue + } else if err != nil { + return "", err + } + modulePath := modfile.ModulePath(dat) + return filepath.ToSlash(filepath.Join(modulePath, strings.TrimPrefix(srcDir, currentDir))), nil + } + } + // fall back to GOPATH mode + goPaths := os.Getenv("GOPATH") + if goPaths == "" { + return "", fmt.Errorf("GOPATH is not set") + } + goPathList := strings.Split(goPaths, string(os.PathListSeparator)) + for _, goPath := range goPathList { + sourceRoot := filepath.Join(goPath, "src") + string(os.PathSeparator) + if strings.HasPrefix(srcDir, sourceRoot) { + return filepath.ToSlash(strings.TrimPrefix(srcDir, sourceRoot)), nil + } + } + return "", errOutsideGoPath +} diff --git a/backend/vendor/go.uber.org/mock/mockgen/model/model.go b/backend/vendor/go.uber.org/mock/mockgen/model/model.go new file mode 100644 index 0000000..853dbf2 --- /dev/null +++ b/backend/vendor/go.uber.org/mock/mockgen/model/model.go @@ -0,0 +1,533 @@ +// Copyright 2012 Google Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package model contains the data model necessary for generating mock implementations. +package model + +import ( + "encoding/gob" + "fmt" + "io" + "reflect" + "strings" +) + +// pkgPath is the importable path for package model +const pkgPath = "go.uber.org/mock/mockgen/model" + +// Package is a Go package. It may be a subset. +type Package struct { + Name string + PkgPath string + Interfaces []*Interface + DotImports []string +} + +// Print writes the package name and its exported interfaces. +func (pkg *Package) Print(w io.Writer) { + _, _ = fmt.Fprintf(w, "package %s\n", pkg.Name) + for _, intf := range pkg.Interfaces { + intf.Print(w) + } +} + +// Imports returns the imports needed by the Package as a set of import paths. +func (pkg *Package) Imports() map[string]bool { + im := make(map[string]bool) + for _, intf := range pkg.Interfaces { + intf.addImports(im) + for _, tp := range intf.TypeParams { + tp.Type.addImports(im) + } + } + return im +} + +// Interface is a Go interface. +type Interface struct { + Name string + Methods []*Method + TypeParams []*Parameter +} + +// Print writes the interface name and its methods. +func (intf *Interface) Print(w io.Writer) { + _, _ = fmt.Fprintf(w, "interface %s\n", intf.Name) + for _, m := range intf.Methods { + m.Print(w) + } +} + +func (intf *Interface) addImports(im map[string]bool) { + for _, m := range intf.Methods { + m.addImports(im) + } +} + +// AddMethod adds a new method, de-duplicating by method name. +func (intf *Interface) AddMethod(m *Method) { + for _, me := range intf.Methods { + if me.Name == m.Name { + return + } + } + intf.Methods = append(intf.Methods, m) +} + +// Method is a single method of an interface. +type Method struct { + Name string + In, Out []*Parameter + Variadic *Parameter // may be nil +} + +// Print writes the method name and its signature. +func (m *Method) Print(w io.Writer) { + _, _ = fmt.Fprintf(w, " - method %s\n", m.Name) + if len(m.In) > 0 { + _, _ = fmt.Fprintf(w, " in:\n") + for _, p := range m.In { + p.Print(w) + } + } + if m.Variadic != nil { + _, _ = fmt.Fprintf(w, " ...:\n") + m.Variadic.Print(w) + } + if len(m.Out) > 0 { + _, _ = fmt.Fprintf(w, " out:\n") + for _, p := range m.Out { + p.Print(w) + } + } +} + +func (m *Method) addImports(im map[string]bool) { + for _, p := range m.In { + p.Type.addImports(im) + } + if m.Variadic != nil { + m.Variadic.Type.addImports(im) + } + for _, p := range m.Out { + p.Type.addImports(im) + } +} + +// Parameter is an argument or return parameter of a method. +type Parameter struct { + Name string // may be empty + Type Type +} + +// Print writes a method parameter. +func (p *Parameter) Print(w io.Writer) { + n := p.Name + if n == "" { + n = `""` + } + _, _ = fmt.Fprintf(w, " - %v: %v\n", n, p.Type.String(nil, "")) +} + +// Type is a Go type. +type Type interface { + String(pm map[string]string, pkgOverride string) string + addImports(im map[string]bool) +} + +func init() { + // Call gob.RegisterName with pkgPath as prefix to avoid conflicting with + // github.com/golang/mock/mockgen/model 's registration. + gob.RegisterName(pkgPath+".ArrayType", &ArrayType{}) + gob.RegisterName(pkgPath+".ChanType", &ChanType{}) + gob.RegisterName(pkgPath+".FuncType", &FuncType{}) + gob.RegisterName(pkgPath+".MapType", &MapType{}) + gob.RegisterName(pkgPath+".NamedType", &NamedType{}) + gob.RegisterName(pkgPath+".PointerType", &PointerType{}) + + // Call gob.RegisterName to make sure it has the consistent name registered + // for both gob decoder and encoder. + // + // For a non-pointer type, gob.Register will try to get package full path by + // calling rt.PkgPath() for a name to register. If your project has vendor + // directory, it is possible that PkgPath will get a path like this: + // ../../../vendor/go.uber.org/mock/mockgen/model + gob.RegisterName(pkgPath+".PredeclaredType", PredeclaredType("")) +} + +// ArrayType is an array or slice type. +type ArrayType struct { + Len int // -1 for slices, >= 0 for arrays + Type Type +} + +func (at *ArrayType) String(pm map[string]string, pkgOverride string) string { + s := "[]" + if at.Len > -1 { + s = fmt.Sprintf("[%d]", at.Len) + } + return s + at.Type.String(pm, pkgOverride) +} + +func (at *ArrayType) addImports(im map[string]bool) { at.Type.addImports(im) } + +// ChanType is a channel type. +type ChanType struct { + Dir ChanDir // 0, 1 or 2 + Type Type +} + +func (ct *ChanType) String(pm map[string]string, pkgOverride string) string { + s := ct.Type.String(pm, pkgOverride) + if ct.Dir == RecvDir { + return "<-chan " + s + } + if ct.Dir == SendDir { + return "chan<- " + s + } + return "chan " + s +} + +func (ct *ChanType) addImports(im map[string]bool) { ct.Type.addImports(im) } + +// ChanDir is a channel direction. +type ChanDir int + +// Constants for channel directions. +const ( + RecvDir ChanDir = 1 + SendDir ChanDir = 2 +) + +// FuncType is a function type. +type FuncType struct { + In, Out []*Parameter + Variadic *Parameter // may be nil +} + +func (ft *FuncType) String(pm map[string]string, pkgOverride string) string { + args := make([]string, len(ft.In)) + for i, p := range ft.In { + args[i] = p.Type.String(pm, pkgOverride) + } + if ft.Variadic != nil { + args = append(args, "..."+ft.Variadic.Type.String(pm, pkgOverride)) + } + rets := make([]string, len(ft.Out)) + for i, p := range ft.Out { + rets[i] = p.Type.String(pm, pkgOverride) + } + retString := strings.Join(rets, ", ") + if nOut := len(ft.Out); nOut == 1 { + retString = " " + retString + } else if nOut > 1 { + retString = " (" + retString + ")" + } + return "func(" + strings.Join(args, ", ") + ")" + retString +} + +func (ft *FuncType) addImports(im map[string]bool) { + for _, p := range ft.In { + p.Type.addImports(im) + } + if ft.Variadic != nil { + ft.Variadic.Type.addImports(im) + } + for _, p := range ft.Out { + p.Type.addImports(im) + } +} + +// MapType is a map type. +type MapType struct { + Key, Value Type +} + +func (mt *MapType) String(pm map[string]string, pkgOverride string) string { + return "map[" + mt.Key.String(pm, pkgOverride) + "]" + mt.Value.String(pm, pkgOverride) +} + +func (mt *MapType) addImports(im map[string]bool) { + mt.Key.addImports(im) + mt.Value.addImports(im) +} + +// NamedType is an exported type in a package. +type NamedType struct { + Package string // may be empty + Type string + TypeParams *TypeParametersType +} + +func (nt *NamedType) String(pm map[string]string, pkgOverride string) string { + if pkgOverride == nt.Package { + return nt.Type + nt.TypeParams.String(pm, pkgOverride) + } + prefix := pm[nt.Package] + if prefix != "" { + return prefix + "." + nt.Type + nt.TypeParams.String(pm, pkgOverride) + } + + return nt.Type + nt.TypeParams.String(pm, pkgOverride) +} + +func (nt *NamedType) addImports(im map[string]bool) { + if nt.Package != "" { + im[nt.Package] = true + } + nt.TypeParams.addImports(im) +} + +// PointerType is a pointer to another type. +type PointerType struct { + Type Type +} + +func (pt *PointerType) String(pm map[string]string, pkgOverride string) string { + return "*" + pt.Type.String(pm, pkgOverride) +} +func (pt *PointerType) addImports(im map[string]bool) { pt.Type.addImports(im) } + +// PredeclaredType is a predeclared type such as "int". +type PredeclaredType string + +func (pt PredeclaredType) String(map[string]string, string) string { return string(pt) } +func (pt PredeclaredType) addImports(map[string]bool) {} + +// TypeParametersType contains type parameters for a NamedType. +type TypeParametersType struct { + TypeParameters []Type +} + +func (tp *TypeParametersType) String(pm map[string]string, pkgOverride string) string { + if tp == nil || len(tp.TypeParameters) == 0 { + return "" + } + var sb strings.Builder + sb.WriteString("[") + for i, v := range tp.TypeParameters { + if i != 0 { + sb.WriteString(", ") + } + sb.WriteString(v.String(pm, pkgOverride)) + } + sb.WriteString("]") + return sb.String() +} + +func (tp *TypeParametersType) addImports(im map[string]bool) { + if tp == nil { + return + } + for _, v := range tp.TypeParameters { + v.addImports(im) + } +} + +// The following code is intended to be called by the program generated by ../reflect.go. + +// InterfaceFromInterfaceType returns a pointer to an interface for the +// given reflection interface type. +func InterfaceFromInterfaceType(it reflect.Type) (*Interface, error) { + if it.Kind() != reflect.Interface { + return nil, fmt.Errorf("%v is not an interface", it) + } + intf := &Interface{} + + for i := 0; i < it.NumMethod(); i++ { + mt := it.Method(i) + // TODO: need to skip unexported methods? or just raise an error? + m := &Method{ + Name: mt.Name, + } + + var err error + m.In, m.Variadic, m.Out, err = funcArgsFromType(mt.Type) + if err != nil { + return nil, err + } + + intf.AddMethod(m) + } + + return intf, nil +} + +// t's Kind must be a reflect.Func. +func funcArgsFromType(t reflect.Type) (in []*Parameter, variadic *Parameter, out []*Parameter, err error) { + nin := t.NumIn() + if t.IsVariadic() { + nin-- + } + var p *Parameter + for i := 0; i < nin; i++ { + p, err = parameterFromType(t.In(i)) + if err != nil { + return + } + in = append(in, p) + } + if t.IsVariadic() { + p, err = parameterFromType(t.In(nin).Elem()) + if err != nil { + return + } + variadic = p + } + for i := 0; i < t.NumOut(); i++ { + p, err = parameterFromType(t.Out(i)) + if err != nil { + return + } + out = append(out, p) + } + return +} + +func parameterFromType(t reflect.Type) (*Parameter, error) { + tt, err := typeFromType(t) + if err != nil { + return nil, err + } + return &Parameter{Type: tt}, nil +} + +var errorType = reflect.TypeOf((*error)(nil)).Elem() + +var byteType = reflect.TypeOf(byte(0)) + +func typeFromType(t reflect.Type) (Type, error) { + // Hack workaround for https://golang.org/issue/3853. + // This explicit check should not be necessary. + if t == byteType { + return PredeclaredType("byte"), nil + } + + if imp := t.PkgPath(); imp != "" { + return &NamedType{ + Package: impPath(imp), + Type: t.Name(), + }, nil + } + + // only unnamed or predeclared types after here + + // Lots of types have element types. Let's do the parsing and error checking for all of them. + var elemType Type + switch t.Kind() { + case reflect.Array, reflect.Chan, reflect.Map, reflect.Ptr, reflect.Slice: + var err error + elemType, err = typeFromType(t.Elem()) + if err != nil { + return nil, err + } + } + + switch t.Kind() { + case reflect.Array: + return &ArrayType{ + Len: t.Len(), + Type: elemType, + }, nil + case reflect.Bool, reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, + reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr, + reflect.Float32, reflect.Float64, reflect.Complex64, reflect.Complex128, reflect.String: + return PredeclaredType(t.Kind().String()), nil + case reflect.Chan: + var dir ChanDir + switch t.ChanDir() { + case reflect.RecvDir: + dir = RecvDir + case reflect.SendDir: + dir = SendDir + } + return &ChanType{ + Dir: dir, + Type: elemType, + }, nil + case reflect.Func: + in, variadic, out, err := funcArgsFromType(t) + if err != nil { + return nil, err + } + return &FuncType{ + In: in, + Out: out, + Variadic: variadic, + }, nil + case reflect.Interface: + // Two special interfaces. + if t.NumMethod() == 0 { + return PredeclaredType("any"), nil + } + if t == errorType { + return PredeclaredType("error"), nil + } + case reflect.Map: + kt, err := typeFromType(t.Key()) + if err != nil { + return nil, err + } + return &MapType{ + Key: kt, + Value: elemType, + }, nil + case reflect.Ptr: + return &PointerType{ + Type: elemType, + }, nil + case reflect.Slice: + return &ArrayType{ + Len: -1, + Type: elemType, + }, nil + case reflect.Struct: + if t.NumField() == 0 { + return PredeclaredType("struct{}"), nil + } + } + + // TODO: Struct, UnsafePointer + return nil, fmt.Errorf("can't yet turn %v (%v) into a model.Type", t, t.Kind()) +} + +// impPath sanitizes the package path returned by `PkgPath` method of a reflect Type so that +// it is importable. PkgPath might return a path that includes "vendor". These paths do not +// compile, so we need to remove everything up to and including "/vendor/". +// See https://github.com/golang/go/issues/12019. +func impPath(imp string) string { + if strings.HasPrefix(imp, "vendor/") { + imp = "/" + imp + } + if i := strings.LastIndex(imp, "/vendor/"); i != -1 { + imp = imp[i+len("/vendor/"):] + } + return imp +} + +// ErrorInterface represent built-in error interface. +var ErrorInterface = Interface{ + Name: "error", + Methods: []*Method{ + { + Name: "Error", + Out: []*Parameter{ + { + Name: "", + Type: PredeclaredType("string"), + }, + }, + }, + }, +} diff --git a/backend/vendor/go.uber.org/mock/mockgen/model/model_gotypes.go b/backend/vendor/go.uber.org/mock/mockgen/model/model_gotypes.go new file mode 100644 index 0000000..4596c3d --- /dev/null +++ b/backend/vendor/go.uber.org/mock/mockgen/model/model_gotypes.go @@ -0,0 +1,160 @@ +package model + +import ( + "fmt" + "go/types" +) + +// InterfaceFromGoTypesType returns a pointer to an interface for the +// given interface type loaded from archive. +func InterfaceFromGoTypesType(it *types.Interface) (*Interface, error) { + intf := &Interface{} + + for i := 0; i < it.NumMethods(); i++ { + mt := it.Method(i) + // Skip unexported methods. + if !mt.Exported() { + continue + } + m := &Method{ + Name: mt.Name(), + } + + var err error + m.In, m.Variadic, m.Out, err = funcArgsFromGoTypesType(mt.Type().(*types.Signature)) + if err != nil { + return nil, fmt.Errorf("method %q: %w", mt.Name(), err) + } + + intf.AddMethod(m) + } + + return intf, nil +} + +func funcArgsFromGoTypesType(t *types.Signature) (in []*Parameter, variadic *Parameter, out []*Parameter, err error) { + nin := t.Params().Len() + if t.Variadic() { + nin-- + } + for i := 0; i < nin; i++ { + p, err := parameterFromGoTypesType(t.Params().At(i), false) + if err != nil { + return nil, nil, nil, err + } + in = append(in, p) + } + if t.Variadic() { + p, err := parameterFromGoTypesType(t.Params().At(nin), true) + if err != nil { + return nil, nil, nil, err + } + variadic = p + } + for i := 0; i < t.Results().Len(); i++ { + p, err := parameterFromGoTypesType(t.Results().At(i), false) + if err != nil { + return nil, nil, nil, err + } + out = append(out, p) + } + return +} + +func parameterFromGoTypesType(v *types.Var, variadic bool) (*Parameter, error) { + t := v.Type() + if variadic { + t = t.(*types.Slice).Elem() + } + tt, err := typeFromGoTypesType(t) + if err != nil { + return nil, err + } + return &Parameter{Name: v.Name(), Type: tt}, nil +} + +func typeFromGoTypesType(t types.Type) (Type, error) { + if t, ok := t.(*types.Named); ok { + tn := t.Obj() + if tn.Pkg() == nil { + return PredeclaredType(tn.Name()), nil + } + return &NamedType{ + Package: tn.Pkg().Path(), + Type: tn.Name(), + }, nil + } + + // only unnamed or predeclared types after here + + // Lots of types have element types. Let's do the parsing and error checking for all of them. + var elemType Type + if t, ok := t.(interface{ Elem() types.Type }); ok { + var err error + elemType, err = typeFromGoTypesType(t.Elem()) + if err != nil { + return nil, err + } + } + + switch t := t.(type) { + case *types.Array: + return &ArrayType{ + Len: int(t.Len()), + Type: elemType, + }, nil + case *types.Basic: + return PredeclaredType(t.String()), nil + case *types.Chan: + var dir ChanDir + switch t.Dir() { + case types.RecvOnly: + dir = RecvDir + case types.SendOnly: + dir = SendDir + } + return &ChanType{ + Dir: dir, + Type: elemType, + }, nil + case *types.Signature: + in, variadic, out, err := funcArgsFromGoTypesType(t) + if err != nil { + return nil, err + } + return &FuncType{ + In: in, + Out: out, + Variadic: variadic, + }, nil + case *types.Interface: + if t.NumMethods() == 0 { + return PredeclaredType("interface{}"), nil + } + case *types.Map: + kt, err := typeFromGoTypesType(t.Key()) + if err != nil { + return nil, err + } + return &MapType{ + Key: kt, + Value: elemType, + }, nil + case *types.Pointer: + return &PointerType{ + Type: elemType, + }, nil + case *types.Slice: + return &ArrayType{ + Len: -1, + Type: elemType, + }, nil + case *types.Struct: + if t.NumFields() == 0 { + return PredeclaredType("struct{}"), nil + } + // TODO: UnsafePointer + } + + return nil, fmt.Errorf("can't yet turn %v (%T) into a model.Type", t.String(), t) +} diff --git a/backend/vendor/go.uber.org/mock/mockgen/package_mode.go b/backend/vendor/go.uber.org/mock/mockgen/package_mode.go new file mode 100644 index 0000000..29fab7f --- /dev/null +++ b/backend/vendor/go.uber.org/mock/mockgen/package_mode.go @@ -0,0 +1,359 @@ +package main + +import ( + "errors" + "flag" + "fmt" + "go/types" + "strings" + + "go.uber.org/mock/mockgen/model" + "golang.org/x/tools/go/packages" +) + +var ( + buildFlags = flag.String("build_flags", "", "(package mode) Additional flags for go build.") +) + +type packageModeParser struct { + pkgName string +} + +func (p *packageModeParser) parsePackage(packageName string, ifaces []string) (*model.Package, error) { + p.pkgName = packageName + + pkg, err := p.loadPackage(packageName) + if err != nil { + return nil, fmt.Errorf("load package: %w", err) + } + + interfaces, err := p.extractInterfacesFromPackage(pkg, ifaces) + if err != nil { + return nil, fmt.Errorf("extract interfaces from package: %w", err) + } + + return &model.Package{ + Name: pkg.Types.Name(), + PkgPath: packageName, + Interfaces: interfaces, + }, nil +} + +func (p *packageModeParser) loadPackage(packageName string) (*packages.Package, error) { + var buildFlagsSet []string + if *buildFlags != "" { + buildFlagsSet = strings.Split(*buildFlags, " ") + } + + cfg := &packages.Config{ + Mode: packages.NeedDeps | packages.NeedImports | packages.NeedTypes | packages.NeedTypesInfo | packages.NeedEmbedFiles | packages.LoadSyntax, + BuildFlags: buildFlagsSet, + } + pkgs, err := packages.Load(cfg, packageName) + if err != nil { + return nil, fmt.Errorf("load packages: %w", err) + } + + if len(pkgs) != 1 { + return nil, fmt.Errorf("packages length must be 1: %d", len(pkgs)) + } + + if len(pkgs[0].Errors) > 0 { + errs := make([]error, len(pkgs[0].Errors)) + for i, err := range pkgs[0].Errors { + errs[i] = err + } + + return nil, errors.Join(errs...) + } + + return pkgs[0], nil +} + +func (p *packageModeParser) extractInterfacesFromPackage(pkg *packages.Package, ifaces []string) ([]*model.Interface, error) { + interfaces := make([]*model.Interface, len(ifaces)) + for i, iface := range ifaces { + obj := pkg.Types.Scope().Lookup(iface) + if obj == nil { + return nil, fmt.Errorf("interface %s does not exist", iface) + } + + modelIface, err := p.parseInterface(obj) + if err != nil { + return nil, newParseTypeError("parse interface", obj.Name(), err) + } + + interfaces[i] = modelIface + } + + return interfaces, nil +} + +func (p *packageModeParser) parseInterface(obj types.Object) (*model.Interface, error) { + named, ok := types.Unalias(obj.Type()).(*types.Named) + if !ok { + return nil, fmt.Errorf("%s is not an interface. it is a %T", obj.Name(), obj.Type().Underlying()) + } + + iface, ok := named.Underlying().(*types.Interface) + if !ok { + return nil, fmt.Errorf("%s is not an interface. it is a %T", obj.Name(), obj.Type().Underlying()) + } + + if p.isConstraint(iface) { + return nil, fmt.Errorf("interface %s is a constraint", obj.Name()) + } + + methods := make([]*model.Method, iface.NumMethods()) + for i := range iface.NumMethods() { + method := iface.Method(i) + typedMethod, ok := method.Type().(*types.Signature) + if !ok { + return nil, fmt.Errorf("method %s is not a signature", method.Name()) + } + + modelFunc, err := p.parseFunc(typedMethod) + if err != nil { + return nil, newParseTypeError("parse method", typedMethod.String(), err) + } + + methods[i] = &model.Method{ + Name: method.Name(), + In: modelFunc.In, + Out: modelFunc.Out, + Variadic: modelFunc.Variadic, + } + } + + if named.TypeParams() == nil { + return &model.Interface{Name: obj.Name(), Methods: methods}, nil + } + + typeParams := make([]*model.Parameter, named.TypeParams().Len()) + for i := range named.TypeParams().Len() { + param := named.TypeParams().At(i) + typeParam, err := p.parseConstraint(param) + if err != nil { + return nil, newParseTypeError("parse type parameter", param.String(), err) + } + + typeParams[i] = &model.Parameter{Name: param.Obj().Name(), Type: typeParam} + } + + return &model.Interface{Name: obj.Name(), Methods: methods, TypeParams: typeParams}, nil +} + +func (o *packageModeParser) isConstraint(t *types.Interface) bool { + for i := range t.NumEmbeddeds() { + embed := t.EmbeddedType(i) + if _, ok := embed.Underlying().(*types.Interface); !ok { + return true + } + } + + return false +} + +func (p *packageModeParser) parseType(t types.Type) (model.Type, error) { + switch t := t.(type) { + case *types.Array: + elementType, err := p.parseType(t.Elem()) + if err != nil { + return nil, newParseTypeError("parse array type", t.Elem().String(), err) + } + return &model.ArrayType{Len: int(t.Len()), Type: elementType}, nil + case *types.Slice: + elementType, err := p.parseType(t.Elem()) + if err != nil { + return nil, newParseTypeError("parse slice type", t.Elem().String(), err) + } + + return &model.ArrayType{Len: -1, Type: elementType}, nil + case *types.Chan: + var dir model.ChanDir + switch t.Dir() { + case types.RecvOnly: + dir = model.RecvDir + case types.SendOnly: + dir = model.SendDir + } + + chanType, err := p.parseType(t.Elem()) + if err != nil { + return nil, newParseTypeError("parse chan type", t.Elem().String(), err) + } + + return &model.ChanType{Dir: dir, Type: chanType}, nil + case *types.Signature: + sig, err := p.parseFunc(t) + if err != nil { + return nil, newParseTypeError("parse signature", t.String(), err) + } + + return sig, nil + case *types.Named, *types.Alias: + object := t.(interface{ Obj() *types.TypeName }) + name := object.Obj().Name() + var pkg string + if object.Obj().Pkg() != nil { + pkg = object.Obj().Pkg().Path() + } + + // TypeArgs method not available for aliases in go1.22 + genericType, ok := t.(interface{ TypeArgs() *types.TypeList }) + if !ok || genericType.TypeArgs() == nil { + return &model.NamedType{ + Package: pkg, + Type: name, + }, nil + } + + typeParams := &model.TypeParametersType{TypeParameters: make([]model.Type, genericType.TypeArgs().Len())} + for i := range genericType.TypeArgs().Len() { + typeParam := genericType.TypeArgs().At(i) + typedParam, err := p.parseType(typeParam) + if err != nil { + return nil, newParseTypeError("parse type parameter", typeParam.String(), err) + } + + typeParams.TypeParameters[i] = typedParam + } + + return &model.NamedType{ + Package: pkg, + Type: name, + TypeParams: typeParams, + }, nil + case *types.Interface: + if t.Empty() { + return model.PredeclaredType("any"), nil + } + + return nil, fmt.Errorf("cannot handle non-empty unnamed interfaces") + case *types.Map: + key, err := p.parseType(t.Key()) + if err != nil { + return nil, newParseTypeError("parse map key", t.Key().String(), err) + } + value, err := p.parseType(t.Elem()) + if err != nil { + return nil, newParseTypeError("parse map value", t.Elem().String(), err) + } + + return &model.MapType{Key: key, Value: value}, nil + case *types.Pointer: + valueType, err := p.parseType(t.Elem()) + if err != nil { + return nil, newParseTypeError("parse pointer type", t.Elem().String(), err) + } + + return &model.PointerType{Type: valueType}, nil + case *types.Struct: + if t.NumFields() > 0 { + return nil, fmt.Errorf("cannot handle non-empty unnamed structs") + } + + return model.PredeclaredType("struct{}"), nil + case *types.Basic: + return model.PredeclaredType(t.Name()), nil + case *types.Tuple: + panic("tuple field") // TODO + case *types.TypeParam: + return &model.NamedType{Type: t.Obj().Name()}, nil + default: + panic("unknown type") // TODO + } +} + +func (p *packageModeParser) parseFunc(sig *types.Signature) (*model.FuncType, error) { + var variadic *model.Parameter + params := make([]*model.Parameter, 0, sig.Params().Len()) + for i := range sig.Params().Len() { + param := sig.Params().At(i) + + isVariadicParam := i == sig.Params().Len()-1 && sig.Variadic() + parseType := param.Type() + if isVariadicParam { + sliceType, ok := param.Type().(*types.Slice) + if !ok { + return nil, newParseTypeError("variadic parameter is not a slice", param.String(), nil) + } + + parseType = sliceType.Elem() + } + + paramType, err := p.parseType(parseType) + if err != nil { + return nil, newParseTypeError("parse parameter type", parseType.String(), err) + } + + modelParameter := &model.Parameter{Type: paramType, Name: param.Name()} + + if isVariadicParam { + variadic = modelParameter + } else { + params = append(params, modelParameter) + } + } + + if len(params) == 0 { + params = nil + } + + results := make([]*model.Parameter, sig.Results().Len()) + for i := range sig.Results().Len() { + result := sig.Results().At(i) + + resultType, err := p.parseType(result.Type()) + if err != nil { + return nil, newParseTypeError("parse result type", result.Type().String(), err) + } + + results[i] = &model.Parameter{Type: resultType, Name: result.Name()} + } + + if len(results) == 0 { + results = nil + } + + return &model.FuncType{ + In: params, + Out: results, + Variadic: variadic, + }, nil +} + +func (p *packageModeParser) parseConstraint(t *types.TypeParam) (model.Type, error) { + if t == nil { + return nil, fmt.Errorf("nil type param") + } + + typeParam, err := p.parseType(t.Constraint()) + if err != nil { + return nil, newParseTypeError("parse constraint type", t.Constraint().String(), err) + } + + return typeParam, nil +} + +type parseTypeError struct { + message string + typeString string + error error +} + +func newParseTypeError(message string, typeString string, error error) *parseTypeError { + return &parseTypeError{typeString: typeString, error: error, message: message} +} + +func (p parseTypeError) Error() string { + if p.error != nil { + return fmt.Sprintf("%s: error parsing %s: %s", p.message, p.typeString, p.error) + } + + return fmt.Sprintf("%s: error parsing type %s", p.message, p.typeString) +} + +func (p parseTypeError) Unwrap() error { + return p.error +} diff --git a/backend/vendor/go.uber.org/mock/mockgen/parse.go b/backend/vendor/go.uber.org/mock/mockgen/parse.go new file mode 100644 index 0000000..f43321c --- /dev/null +++ b/backend/vendor/go.uber.org/mock/mockgen/parse.go @@ -0,0 +1,805 @@ +// Copyright 2012 Google Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package main + +// This file contains the model construction by parsing source files. + +import ( + "errors" + "fmt" + "go/ast" + "go/build" + "go/importer" + "go/parser" + "go/token" + "go/types" + "log" + "os" + "path" + "path/filepath" + "strconv" + "strings" + + "go.uber.org/mock/mockgen/model" +) + +// sourceMode generates mocks via source file. +func sourceMode(source string) (*model.Package, error) { + srcDir, err := filepath.Abs(filepath.Dir(source)) + if err != nil { + return nil, fmt.Errorf("failed getting source directory: %v", err) + } + + packageImport, err := parsePackageImport(srcDir) + if err != nil { + return nil, err + } + + fs := token.NewFileSet() + file, err := parser.ParseFile(fs, source, nil, 0) + if err != nil { + return nil, fmt.Errorf("failed parsing source file %v: %v", source, err) + } + + p := &fileParser{ + fileSet: fs, + imports: make(map[string]importedPackage), + importedInterfaces: newInterfaceCache(), + auxInterfaces: newInterfaceCache(), + srcDir: srcDir, + } + + // Handle -imports. + dotImports := make(map[string]bool) + if *imports != "" { + for _, kv := range strings.Split(*imports, ",") { + eq := strings.Index(kv, "=") + k, v := kv[:eq], kv[eq+1:] + if k == "." { + dotImports[v] = true + } else { + p.imports[k] = importedPkg{path: v} + } + } + } + + if *excludeInterfaces != "" { + p.excludeNamesSet = parseExcludeInterfaces(*excludeInterfaces) + } + + // Handle -aux_files. + if err := p.parseAuxFiles(*auxFiles); err != nil { + return nil, err + } + p.addAuxInterfacesFromFile(packageImport, file) // this file + + pkg, err := p.parseFile(packageImport, file) + if err != nil { + return nil, err + } + for pkgPath := range dotImports { + pkg.DotImports = append(pkg.DotImports, pkgPath) + } + return pkg, nil +} + +type importedPackage interface { + Path() string + Parser() *fileParser +} + +type importedPkg struct { + path string + parser *fileParser +} + +func (i importedPkg) Path() string { return i.path } +func (i importedPkg) Parser() *fileParser { return i.parser } + +// duplicateImport is a bit of a misnomer. Currently the parser can't +// handle cases of multi-file packages importing different packages +// under the same name. Often these imports would not be problematic, +// so this type lets us defer raising an error unless the package name +// is actually used. +type duplicateImport struct { + name string + duplicates []string +} + +func (d duplicateImport) Error() string { + return fmt.Sprintf("%q is ambiguous because of duplicate imports: %v", d.name, d.duplicates) +} + +func (d duplicateImport) Path() string { log.Fatal(d.Error()); return "" } +func (d duplicateImport) Parser() *fileParser { log.Fatal(d.Error()); return nil } + +type interfaceCache struct { + m map[string]map[string]*namedInterface +} + +func newInterfaceCache() *interfaceCache { + return &interfaceCache{ + m: make(map[string]map[string]*namedInterface), + } +} + +func (i *interfaceCache) Set(pkg, name string, it *namedInterface) { + if _, ok := i.m[pkg]; !ok { + i.m[pkg] = make(map[string]*namedInterface) + } + i.m[pkg][name] = it +} + +func (i *interfaceCache) Get(pkg, name string) *namedInterface { + if _, ok := i.m[pkg]; !ok { + return nil + } + return i.m[pkg][name] +} + +func (i *interfaceCache) GetASTIface(pkg, name string) *ast.InterfaceType { + if _, ok := i.m[pkg]; !ok { + return nil + } + it, ok := i.m[pkg][name] + if !ok { + return nil + } + return it.it +} + +type fileParser struct { + fileSet *token.FileSet + imports map[string]importedPackage // package name => imported package + importedInterfaces *interfaceCache + auxFiles []*ast.File + auxInterfaces *interfaceCache + srcDir string + excludeNamesSet map[string]struct{} +} + +func (p *fileParser) errorf(pos token.Pos, format string, args ...any) error { + ps := p.fileSet.Position(pos) + format = "%s:%d:%d: " + format + args = append([]any{ps.Filename, ps.Line, ps.Column}, args...) + return fmt.Errorf(format, args...) +} + +func (p *fileParser) parseAuxFiles(auxFiles string) error { + auxFiles = strings.TrimSpace(auxFiles) + if auxFiles == "" { + return nil + } + for _, kv := range strings.Split(auxFiles, ",") { + parts := strings.SplitN(kv, "=", 2) + if len(parts) != 2 { + return fmt.Errorf("bad aux file spec: %v", kv) + } + pkg, fpath := parts[0], parts[1] + + file, err := parser.ParseFile(p.fileSet, fpath, nil, 0) + if err != nil { + return err + } + p.auxFiles = append(p.auxFiles, file) + p.addAuxInterfacesFromFile(pkg, file) + } + return nil +} + +func (p *fileParser) addAuxInterfacesFromFile(pkg string, file *ast.File) { + for ni := range iterInterfaces(file) { + p.auxInterfaces.Set(pkg, ni.name.Name, ni) + } +} + +// parseFile loads all file imports and auxiliary files import into the +// fileParser, parses all file interfaces and returns package model. +func (p *fileParser) parseFile(importPath string, file *ast.File) (*model.Package, error) { + allImports, dotImports := importsOfFile(file) + // Don't stomp imports provided by -imports. Those should take precedence. + for pkg, pkgI := range allImports { + if _, ok := p.imports[pkg]; !ok { + p.imports[pkg] = pkgI + } + } + // Add imports from auxiliary files, which might be needed for embedded interfaces. + // Don't stomp any other imports. + for _, f := range p.auxFiles { + auxImports, _ := importsOfFile(f) + for pkg, pkgI := range auxImports { + if _, ok := p.imports[pkg]; !ok { + p.imports[pkg] = pkgI + } + } + } + + var is []*model.Interface + for ni := range iterInterfaces(file) { + if _, ok := p.excludeNamesSet[ni.name.String()]; ok { + continue + } + i, err := p.parseInterface(ni.name.String(), importPath, ni) + if errors.Is(err, errConstraintInterface) { + continue + } + if err != nil { + return nil, err + } + is = append(is, i) + } + return &model.Package{ + Name: file.Name.String(), + PkgPath: importPath, + Interfaces: is, + DotImports: dotImports, + }, nil +} + +// parsePackage loads package specified by path, parses it and returns +// a new fileParser with the parsed imports and interfaces. +func (p *fileParser) parsePackage(path string) (*fileParser, error) { + newP := &fileParser{ + fileSet: token.NewFileSet(), + imports: make(map[string]importedPackage), + importedInterfaces: newInterfaceCache(), + auxInterfaces: newInterfaceCache(), + srcDir: p.srcDir, + } + + var pkgs map[string]*ast.Package + if imp, err := build.Import(path, newP.srcDir, build.FindOnly); err != nil { + return nil, err + } else if pkgs, err = parser.ParseDir(newP.fileSet, imp.Dir, nil, 0); err != nil { + return nil, err + } + + for _, pkg := range pkgs { + file := ast.MergePackageFiles(pkg, ast.FilterFuncDuplicates|ast.FilterUnassociatedComments|ast.FilterImportDuplicates) + for ni := range iterInterfaces(file) { + newP.importedInterfaces.Set(path, ni.name.Name, ni) + } + imports, _ := importsOfFile(file) + for pkgName, pkgI := range imports { + newP.imports[pkgName] = pkgI + } + } + return newP, nil +} + +func (p *fileParser) constructInstParams(pkg string, params []*ast.Field, instParams []model.Type, embeddedInstParams []ast.Expr, tps map[string]model.Type) ([]model.Type, error) { + pm := make(map[string]int) + var i int + for _, v := range params { + for _, n := range v.Names { + pm[n.Name] = i + instParams = append(instParams, model.PredeclaredType(n.Name)) + i++ + } + } + + var runtimeInstParams []model.Type + for _, instParam := range embeddedInstParams { + switch t := instParam.(type) { + case *ast.Ident: + if idx, ok := pm[t.Name]; ok { + runtimeInstParams = append(runtimeInstParams, instParams[idx]) + continue + } + } + modelType, err := p.parseType(pkg, instParam, tps) + if err != nil { + return nil, err + } + runtimeInstParams = append(runtimeInstParams, modelType) + } + + return runtimeInstParams, nil +} + +func (p *fileParser) constructTps(it *namedInterface) (tps map[string]model.Type) { + tps = make(map[string]model.Type) + n := 0 + for _, tp := range it.typeParams { + for _, tm := range tp.Names { + tps[tm.Name] = nil + if len(it.instTypes) != 0 { + tps[tm.Name] = it.instTypes[n] + n++ + } + } + } + return tps +} + +// parseInterface loads interface specified by pkg and name, parses it and returns +// a new model with the parsed. +func (p *fileParser) parseInterface(name, pkg string, it *namedInterface) (*model.Interface, error) { + iface := &model.Interface{Name: name} + tps := p.constructTps(it) + tp, err := p.parseFieldList(pkg, it.typeParams, tps) + if err != nil { + return nil, fmt.Errorf("unable to parse interface type parameters: %v", name) + } + + iface.TypeParams = tp + for _, field := range it.it.Methods.List { + var methods []*model.Method + if methods, err = p.parseMethod(field, it, iface, pkg, tps); err != nil { + return nil, err + } + for _, m := range methods { + iface.AddMethod(m) + } + } + return iface, nil +} + +func (p *fileParser) parseMethod(field *ast.Field, it *namedInterface, iface *model.Interface, pkg string, tps map[string]model.Type) ([]*model.Method, error) { + // {} for git diff + { + switch v := field.Type.(type) { + case *ast.FuncType: + if nn := len(field.Names); nn != 1 { + return nil, fmt.Errorf("expected one name for interface %v, got %d", iface.Name, nn) + } + m := &model.Method{ + Name: field.Names[0].String(), + } + var err error + m.In, m.Variadic, m.Out, err = p.parseFunc(pkg, v, tps) + if err != nil { + return nil, err + } + return []*model.Method{m}, nil + case *ast.Ident: + // Embedded interface in this package. + embeddedIfaceType := p.auxInterfaces.Get(pkg, v.String()) + if embeddedIfaceType == nil { + embeddedIfaceType = p.importedInterfaces.Get(pkg, v.String()) + } + + var embeddedIface *model.Interface + if embeddedIfaceType != nil { + var err error + embeddedIfaceType.instTypes, err = p.constructInstParams(pkg, it.typeParams, it.instTypes, it.embeddedInstTypeParams, tps) + if err != nil { + return nil, err + } + embeddedIface, err = p.parseInterface(v.String(), pkg, embeddedIfaceType) + if err != nil { + return nil, err + } + + } else { + // This is built-in error interface. + if v.String() == model.ErrorInterface.Name { + embeddedIface = &model.ErrorInterface + } else { + ip, err := p.parsePackage(pkg) + if err != nil { + return nil, p.errorf(v.Pos(), "could not parse package %s: %v", pkg, err) + } + + if embeddedIfaceType = ip.importedInterfaces.Get(pkg, v.String()); embeddedIfaceType == nil { + return nil, p.errorf(v.Pos(), "unknown embedded interface %s.%s", pkg, v.String()) + } + + embeddedIfaceType.instTypes, err = p.constructInstParams(pkg, it.typeParams, it.instTypes, it.embeddedInstTypeParams, tps) + if err != nil { + return nil, err + } + embeddedIface, err = ip.parseInterface(v.String(), pkg, embeddedIfaceType) + if err != nil { + return nil, err + } + } + } + return embeddedIface.Methods, nil + case *ast.SelectorExpr: + // Embedded interface in another package. + filePkg, sel := v.X.(*ast.Ident).String(), v.Sel.String() + embeddedPkg, ok := p.imports[filePkg] + if !ok { + return nil, p.errorf(v.X.Pos(), "unknown package %s", filePkg) + } + + var embeddedIface *model.Interface + var err error + embeddedIfaceType := p.auxInterfaces.Get(filePkg, sel) + if embeddedIfaceType != nil { + embeddedIfaceType.instTypes, err = p.constructInstParams(pkg, it.typeParams, it.instTypes, it.embeddedInstTypeParams, tps) + if err != nil { + return nil, err + } + embeddedIface, err = p.parseInterface(sel, filePkg, embeddedIfaceType) + if err != nil { + return nil, err + } + } else { + path := embeddedPkg.Path() + parser := embeddedPkg.Parser() + if parser == nil { + ip, err := p.parsePackage(path) + if err != nil { + return nil, p.errorf(v.Pos(), "could not parse package %s: %v", path, err) + } + parser = ip + p.imports[filePkg] = importedPkg{ + path: embeddedPkg.Path(), + parser: parser, + } + } + if embeddedIfaceType = parser.importedInterfaces.Get(path, sel); embeddedIfaceType == nil { + return nil, p.errorf(v.Pos(), "unknown embedded interface %s.%s", path, sel) + } + + embeddedIfaceType.instTypes, err = p.constructInstParams(pkg, it.typeParams, it.instTypes, it.embeddedInstTypeParams, tps) + if err != nil { + return nil, err + } + embeddedIface, err = parser.parseInterface(sel, path, embeddedIfaceType) + if err != nil { + return nil, err + } + } + // TODO: apply shadowing rules. + return embeddedIface.Methods, nil + default: + return p.parseGenericMethod(field, it, iface, pkg, tps) + } + } +} + +func (p *fileParser) parseFunc(pkg string, f *ast.FuncType, tps map[string]model.Type) (inParam []*model.Parameter, variadic *model.Parameter, outParam []*model.Parameter, err error) { + if f.Params != nil { + regParams := f.Params.List + if isVariadic(f) { + n := len(regParams) + varParams := regParams[n-1:] + regParams = regParams[:n-1] + vp, err := p.parseFieldList(pkg, varParams, tps) + if err != nil { + return nil, nil, nil, p.errorf(varParams[0].Pos(), "failed parsing variadic argument: %v", err) + } + variadic = vp[0] + } + inParam, err = p.parseFieldList(pkg, regParams, tps) + if err != nil { + return nil, nil, nil, p.errorf(f.Pos(), "failed parsing arguments: %v", err) + } + } + if f.Results != nil { + outParam, err = p.parseFieldList(pkg, f.Results.List, tps) + if err != nil { + return nil, nil, nil, p.errorf(f.Pos(), "failed parsing returns: %v", err) + } + } + return +} + +func (p *fileParser) parseFieldList(pkg string, fields []*ast.Field, tps map[string]model.Type) ([]*model.Parameter, error) { + nf := 0 + for _, f := range fields { + nn := len(f.Names) + if nn == 0 { + nn = 1 // anonymous parameter + } + nf += nn + } + if nf == 0 { + return nil, nil + } + ps := make([]*model.Parameter, nf) + i := 0 // destination index + for _, f := range fields { + t, err := p.parseType(pkg, f.Type, tps) + if err != nil { + return nil, err + } + + if len(f.Names) == 0 { + // anonymous arg + ps[i] = &model.Parameter{Type: t} + i++ + continue + } + for _, name := range f.Names { + ps[i] = &model.Parameter{Name: name.Name, Type: t} + i++ + } + } + return ps, nil +} + +func (p *fileParser) parseType(pkg string, typ ast.Expr, tps map[string]model.Type) (model.Type, error) { + switch v := typ.(type) { + case *ast.ArrayType: + ln := -1 + if v.Len != nil { + value, err := p.parseArrayLength(v.Len) + if err != nil { + return nil, err + } + ln, err = strconv.Atoi(value) + if err != nil { + return nil, p.errorf(v.Len.Pos(), "bad array size: %v", err) + } + } + t, err := p.parseType(pkg, v.Elt, tps) + if err != nil { + return nil, err + } + return &model.ArrayType{Len: ln, Type: t}, nil + case *ast.ChanType: + t, err := p.parseType(pkg, v.Value, tps) + if err != nil { + return nil, err + } + var dir model.ChanDir + if v.Dir == ast.SEND { + dir = model.SendDir + } + if v.Dir == ast.RECV { + dir = model.RecvDir + } + return &model.ChanType{Dir: dir, Type: t}, nil + case *ast.Ellipsis: + // assume we're parsing a variadic argument + return p.parseType(pkg, v.Elt, tps) + case *ast.FuncType: + in, variadic, out, err := p.parseFunc(pkg, v, tps) + if err != nil { + return nil, err + } + return &model.FuncType{In: in, Out: out, Variadic: variadic}, nil + case *ast.Ident: + it, ok := tps[v.Name] + if v.IsExported() && !ok { + // `pkg` may be an aliased imported pkg + // if so, patch the import w/ the fully qualified import + maybeImportedPkg, ok := p.imports[pkg] + if ok { + pkg = maybeImportedPkg.Path() + } + // assume type in this package + return &model.NamedType{Package: pkg, Type: v.Name}, nil + } + if ok && it != nil { + return it, nil + } + // assume predeclared type + return model.PredeclaredType(v.Name), nil + case *ast.InterfaceType: + if v.Methods != nil && len(v.Methods.List) > 0 { + return nil, p.errorf(v.Pos(), "can't handle non-empty unnamed interface types") + } + return model.PredeclaredType("any"), nil + case *ast.MapType: + key, err := p.parseType(pkg, v.Key, tps) + if err != nil { + return nil, err + } + value, err := p.parseType(pkg, v.Value, tps) + if err != nil { + return nil, err + } + return &model.MapType{Key: key, Value: value}, nil + case *ast.SelectorExpr: + pkgName := v.X.(*ast.Ident).String() + pkg, ok := p.imports[pkgName] + if !ok { + return nil, p.errorf(v.Pos(), "unknown package %q", pkgName) + } + return &model.NamedType{Package: pkg.Path(), Type: v.Sel.String()}, nil + case *ast.StarExpr: + t, err := p.parseType(pkg, v.X, tps) + if err != nil { + return nil, err + } + return &model.PointerType{Type: t}, nil + case *ast.StructType: + if v.Fields != nil && len(v.Fields.List) > 0 { + return nil, p.errorf(v.Pos(), "can't handle non-empty unnamed struct types") + } + return model.PredeclaredType("struct{}"), nil + case *ast.ParenExpr: + return p.parseType(pkg, v.X, tps) + default: + mt, err := p.parseGenericType(pkg, typ, tps) + if err != nil { + return nil, err + } + if mt == nil { + break + } + return mt, nil + } + + return nil, fmt.Errorf("don't know how to parse type %T", typ) +} + +func (p *fileParser) parseArrayLength(expr ast.Expr) (string, error) { + switch val := expr.(type) { + case (*ast.BasicLit): + return val.Value, nil + case (*ast.Ident): + // when the length is a const defined locally + return val.Obj.Decl.(*ast.ValueSpec).Values[0].(*ast.BasicLit).Value, nil + case (*ast.SelectorExpr): + // when the length is a const defined in an external package + usedPkg, err := importer.Default().Import(fmt.Sprintf("%s", val.X)) + if err != nil { + return "", p.errorf(expr.Pos(), "unknown package in array length: %v", err) + } + ev, err := types.Eval(token.NewFileSet(), usedPkg, token.NoPos, val.Sel.Name) + if err != nil { + return "", p.errorf(expr.Pos(), "unknown constant in array length: %v", err) + } + return ev.Value.String(), nil + case (*ast.ParenExpr): + return p.parseArrayLength(val.X) + case (*ast.BinaryExpr): + x, err := p.parseArrayLength(val.X) + if err != nil { + return "", err + } + y, err := p.parseArrayLength(val.Y) + if err != nil { + return "", err + } + biExpr := fmt.Sprintf("%s%v%s", x, val.Op, y) + tv, err := types.Eval(token.NewFileSet(), nil, token.NoPos, biExpr) + if err != nil { + return "", p.errorf(expr.Pos(), "invalid expression in array length: %v", err) + } + return tv.Value.String(), nil + default: + return "", p.errorf(expr.Pos(), "invalid expression in array length: %v", val) + } +} + +// importsOfFile returns a map of package name to import path +// of the imports in file. +func importsOfFile(file *ast.File) (normalImports map[string]importedPackage, dotImports []string) { + var importPaths []string + for _, is := range file.Imports { + if is.Name != nil { + continue + } + importPath := is.Path.Value[1 : len(is.Path.Value)-1] // remove quotes + importPaths = append(importPaths, importPath) + } + packagesName := createPackageMap(importPaths) + normalImports = make(map[string]importedPackage) + dotImports = make([]string, 0) + for _, is := range file.Imports { + var pkgName string + importPath := is.Path.Value[1 : len(is.Path.Value)-1] // remove quotes + + if is.Name != nil { + // Named imports are always certain. + if is.Name.Name == "_" { + continue + } + pkgName = is.Name.Name + } else { + pkg, ok := packagesName[importPath] + if !ok { + // Fallback to import path suffix. Note that this is uncertain. + _, last := path.Split(importPath) + // If the last path component has dots, the first dot-delimited + // field is used as the name. + pkgName = strings.SplitN(last, ".", 2)[0] + } else { + pkgName = pkg + } + } + + if pkgName == "." { + dotImports = append(dotImports, importPath) + } else { + if pkg, ok := normalImports[pkgName]; ok { + switch p := pkg.(type) { + case duplicateImport: + normalImports[pkgName] = duplicateImport{ + name: p.name, + duplicates: append([]string{importPath}, p.duplicates...), + } + case importedPkg: + normalImports[pkgName] = duplicateImport{ + name: pkgName, + duplicates: []string{p.path, importPath}, + } + } + } else { + normalImports[pkgName] = importedPkg{path: importPath} + } + } + } + return +} + +type namedInterface struct { + name *ast.Ident + it *ast.InterfaceType + typeParams []*ast.Field + embeddedInstTypeParams []ast.Expr + instTypes []model.Type +} + +// Create an iterator over all interfaces in file. +func iterInterfaces(file *ast.File) <-chan *namedInterface { + ch := make(chan *namedInterface) + go func() { + for _, decl := range file.Decls { + gd, ok := decl.(*ast.GenDecl) + if !ok || gd.Tok != token.TYPE { + continue + } + for _, spec := range gd.Specs { + ts, ok := spec.(*ast.TypeSpec) + if !ok { + continue + } + it, ok := ts.Type.(*ast.InterfaceType) + if !ok { + continue + } + + ch <- &namedInterface{name: ts.Name, it: it, typeParams: getTypeSpecTypeParams(ts)} + } + } + close(ch) + }() + return ch +} + +// isVariadic returns whether the function is variadic. +func isVariadic(f *ast.FuncType) bool { + nargs := len(f.Params.List) + if nargs == 0 { + return false + } + _, ok := f.Params.List[nargs-1].Type.(*ast.Ellipsis) + return ok +} + +// packageNameOfDir get package import path via dir +func packageNameOfDir(srcDir string) (string, error) { + files, err := os.ReadDir(srcDir) + if err != nil { + log.Fatal(err) + } + + var goFilePath string + for _, file := range files { + if !file.IsDir() && strings.HasSuffix(file.Name(), ".go") { + goFilePath = file.Name() + break + } + } + if goFilePath == "" { + return "", fmt.Errorf("go source file not found %s", srcDir) + } + + packageImport, err := parsePackageImport(srcDir) + if err != nil { + return "", err + } + return packageImport, nil +} + +var errOutsideGoPath = errors.New("source directory is outside GOPATH") diff --git a/backend/vendor/go.uber.org/mock/mockgen/version.go b/backend/vendor/go.uber.org/mock/mockgen/version.go new file mode 100644 index 0000000..6db160a --- /dev/null +++ b/backend/vendor/go.uber.org/mock/mockgen/version.go @@ -0,0 +1,31 @@ +// Copyright 2022 Google LLC +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package main + +import ( + "fmt" + "log" + "runtime/debug" +) + +func printModuleVersion() { + if bi, exists := debug.ReadBuildInfo(); exists { + fmt.Println(bi.Main.Version) + } else { + log.Printf("No version information found. Make sure to use " + + "GO111MODULE=on when running 'go get' in order to use specific " + + "version of the binary.") + } +} diff --git a/backend/vendor/golang.org/x/crypto/chacha20/chacha_arm64.go b/backend/vendor/golang.org/x/crypto/chacha20/chacha_arm64.go new file mode 100644 index 0000000..661ea13 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/chacha20/chacha_arm64.go @@ -0,0 +1,16 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build gc && !purego + +package chacha20 + +const bufSize = 256 + +//go:noescape +func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32) + +func (c *Cipher) xorKeyStreamBlocks(dst, src []byte) { + xorKeyStreamVX(dst, src, &c.key, &c.nonce, &c.counter) +} diff --git a/backend/vendor/golang.org/x/crypto/chacha20/chacha_arm64.s b/backend/vendor/golang.org/x/crypto/chacha20/chacha_arm64.s new file mode 100644 index 0000000..7dd2638 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/chacha20/chacha_arm64.s @@ -0,0 +1,307 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build gc && !purego + +#include "textflag.h" + +#define NUM_ROUNDS 10 + +// func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32) +TEXT ·xorKeyStreamVX(SB), NOSPLIT, $0 + MOVD dst+0(FP), R1 + MOVD src+24(FP), R2 + MOVD src_len+32(FP), R3 + MOVD key+48(FP), R4 + MOVD nonce+56(FP), R6 + MOVD counter+64(FP), R7 + + MOVD $·constants(SB), R10 + MOVD $·incRotMatrix(SB), R11 + + MOVW (R7), R20 + + AND $~255, R3, R13 + ADD R2, R13, R12 // R12 for block end + AND $255, R3, R13 +loop: + MOVD $NUM_ROUNDS, R21 + VLD1 (R11), [V30.S4, V31.S4] + + // load contants + // VLD4R (R10), [V0.S4, V1.S4, V2.S4, V3.S4] + WORD $0x4D60E940 + + // load keys + // VLD4R 16(R4), [V4.S4, V5.S4, V6.S4, V7.S4] + WORD $0x4DFFE884 + // VLD4R 16(R4), [V8.S4, V9.S4, V10.S4, V11.S4] + WORD $0x4DFFE888 + SUB $32, R4 + + // load counter + nonce + // VLD1R (R7), [V12.S4] + WORD $0x4D40C8EC + + // VLD3R (R6), [V13.S4, V14.S4, V15.S4] + WORD $0x4D40E8CD + + // update counter + VADD V30.S4, V12.S4, V12.S4 + +chacha: + // V0..V3 += V4..V7 + // V12..V15 <<<= ((V12..V15 XOR V0..V3), 16) + VADD V0.S4, V4.S4, V0.S4 + VADD V1.S4, V5.S4, V1.S4 + VADD V2.S4, V6.S4, V2.S4 + VADD V3.S4, V7.S4, V3.S4 + VEOR V12.B16, V0.B16, V12.B16 + VEOR V13.B16, V1.B16, V13.B16 + VEOR V14.B16, V2.B16, V14.B16 + VEOR V15.B16, V3.B16, V15.B16 + VREV32 V12.H8, V12.H8 + VREV32 V13.H8, V13.H8 + VREV32 V14.H8, V14.H8 + VREV32 V15.H8, V15.H8 + // V8..V11 += V12..V15 + // V4..V7 <<<= ((V4..V7 XOR V8..V11), 12) + VADD V8.S4, V12.S4, V8.S4 + VADD V9.S4, V13.S4, V9.S4 + VADD V10.S4, V14.S4, V10.S4 + VADD V11.S4, V15.S4, V11.S4 + VEOR V8.B16, V4.B16, V16.B16 + VEOR V9.B16, V5.B16, V17.B16 + VEOR V10.B16, V6.B16, V18.B16 + VEOR V11.B16, V7.B16, V19.B16 + VSHL $12, V16.S4, V4.S4 + VSHL $12, V17.S4, V5.S4 + VSHL $12, V18.S4, V6.S4 + VSHL $12, V19.S4, V7.S4 + VSRI $20, V16.S4, V4.S4 + VSRI $20, V17.S4, V5.S4 + VSRI $20, V18.S4, V6.S4 + VSRI $20, V19.S4, V7.S4 + + // V0..V3 += V4..V7 + // V12..V15 <<<= ((V12..V15 XOR V0..V3), 8) + VADD V0.S4, V4.S4, V0.S4 + VADD V1.S4, V5.S4, V1.S4 + VADD V2.S4, V6.S4, V2.S4 + VADD V3.S4, V7.S4, V3.S4 + VEOR V12.B16, V0.B16, V12.B16 + VEOR V13.B16, V1.B16, V13.B16 + VEOR V14.B16, V2.B16, V14.B16 + VEOR V15.B16, V3.B16, V15.B16 + VTBL V31.B16, [V12.B16], V12.B16 + VTBL V31.B16, [V13.B16], V13.B16 + VTBL V31.B16, [V14.B16], V14.B16 + VTBL V31.B16, [V15.B16], V15.B16 + + // V8..V11 += V12..V15 + // V4..V7 <<<= ((V4..V7 XOR V8..V11), 7) + VADD V12.S4, V8.S4, V8.S4 + VADD V13.S4, V9.S4, V9.S4 + VADD V14.S4, V10.S4, V10.S4 + VADD V15.S4, V11.S4, V11.S4 + VEOR V8.B16, V4.B16, V16.B16 + VEOR V9.B16, V5.B16, V17.B16 + VEOR V10.B16, V6.B16, V18.B16 + VEOR V11.B16, V7.B16, V19.B16 + VSHL $7, V16.S4, V4.S4 + VSHL $7, V17.S4, V5.S4 + VSHL $7, V18.S4, V6.S4 + VSHL $7, V19.S4, V7.S4 + VSRI $25, V16.S4, V4.S4 + VSRI $25, V17.S4, V5.S4 + VSRI $25, V18.S4, V6.S4 + VSRI $25, V19.S4, V7.S4 + + // V0..V3 += V5..V7, V4 + // V15,V12-V14 <<<= ((V15,V12-V14 XOR V0..V3), 16) + VADD V0.S4, V5.S4, V0.S4 + VADD V1.S4, V6.S4, V1.S4 + VADD V2.S4, V7.S4, V2.S4 + VADD V3.S4, V4.S4, V3.S4 + VEOR V15.B16, V0.B16, V15.B16 + VEOR V12.B16, V1.B16, V12.B16 + VEOR V13.B16, V2.B16, V13.B16 + VEOR V14.B16, V3.B16, V14.B16 + VREV32 V12.H8, V12.H8 + VREV32 V13.H8, V13.H8 + VREV32 V14.H8, V14.H8 + VREV32 V15.H8, V15.H8 + + // V10 += V15; V5 <<<= ((V10 XOR V5), 12) + // ... + VADD V15.S4, V10.S4, V10.S4 + VADD V12.S4, V11.S4, V11.S4 + VADD V13.S4, V8.S4, V8.S4 + VADD V14.S4, V9.S4, V9.S4 + VEOR V10.B16, V5.B16, V16.B16 + VEOR V11.B16, V6.B16, V17.B16 + VEOR V8.B16, V7.B16, V18.B16 + VEOR V9.B16, V4.B16, V19.B16 + VSHL $12, V16.S4, V5.S4 + VSHL $12, V17.S4, V6.S4 + VSHL $12, V18.S4, V7.S4 + VSHL $12, V19.S4, V4.S4 + VSRI $20, V16.S4, V5.S4 + VSRI $20, V17.S4, V6.S4 + VSRI $20, V18.S4, V7.S4 + VSRI $20, V19.S4, V4.S4 + + // V0 += V5; V15 <<<= ((V0 XOR V15), 8) + // ... + VADD V5.S4, V0.S4, V0.S4 + VADD V6.S4, V1.S4, V1.S4 + VADD V7.S4, V2.S4, V2.S4 + VADD V4.S4, V3.S4, V3.S4 + VEOR V0.B16, V15.B16, V15.B16 + VEOR V1.B16, V12.B16, V12.B16 + VEOR V2.B16, V13.B16, V13.B16 + VEOR V3.B16, V14.B16, V14.B16 + VTBL V31.B16, [V12.B16], V12.B16 + VTBL V31.B16, [V13.B16], V13.B16 + VTBL V31.B16, [V14.B16], V14.B16 + VTBL V31.B16, [V15.B16], V15.B16 + + // V10 += V15; V5 <<<= ((V10 XOR V5), 7) + // ... + VADD V15.S4, V10.S4, V10.S4 + VADD V12.S4, V11.S4, V11.S4 + VADD V13.S4, V8.S4, V8.S4 + VADD V14.S4, V9.S4, V9.S4 + VEOR V10.B16, V5.B16, V16.B16 + VEOR V11.B16, V6.B16, V17.B16 + VEOR V8.B16, V7.B16, V18.B16 + VEOR V9.B16, V4.B16, V19.B16 + VSHL $7, V16.S4, V5.S4 + VSHL $7, V17.S4, V6.S4 + VSHL $7, V18.S4, V7.S4 + VSHL $7, V19.S4, V4.S4 + VSRI $25, V16.S4, V5.S4 + VSRI $25, V17.S4, V6.S4 + VSRI $25, V18.S4, V7.S4 + VSRI $25, V19.S4, V4.S4 + + SUB $1, R21 + CBNZ R21, chacha + + // VLD4R (R10), [V16.S4, V17.S4, V18.S4, V19.S4] + WORD $0x4D60E950 + + // VLD4R 16(R4), [V20.S4, V21.S4, V22.S4, V23.S4] + WORD $0x4DFFE894 + VADD V30.S4, V12.S4, V12.S4 + VADD V16.S4, V0.S4, V0.S4 + VADD V17.S4, V1.S4, V1.S4 + VADD V18.S4, V2.S4, V2.S4 + VADD V19.S4, V3.S4, V3.S4 + // VLD4R 16(R4), [V24.S4, V25.S4, V26.S4, V27.S4] + WORD $0x4DFFE898 + // restore R4 + SUB $32, R4 + + // load counter + nonce + // VLD1R (R7), [V28.S4] + WORD $0x4D40C8FC + // VLD3R (R6), [V29.S4, V30.S4, V31.S4] + WORD $0x4D40E8DD + + VADD V20.S4, V4.S4, V4.S4 + VADD V21.S4, V5.S4, V5.S4 + VADD V22.S4, V6.S4, V6.S4 + VADD V23.S4, V7.S4, V7.S4 + VADD V24.S4, V8.S4, V8.S4 + VADD V25.S4, V9.S4, V9.S4 + VADD V26.S4, V10.S4, V10.S4 + VADD V27.S4, V11.S4, V11.S4 + VADD V28.S4, V12.S4, V12.S4 + VADD V29.S4, V13.S4, V13.S4 + VADD V30.S4, V14.S4, V14.S4 + VADD V31.S4, V15.S4, V15.S4 + + VZIP1 V1.S4, V0.S4, V16.S4 + VZIP2 V1.S4, V0.S4, V17.S4 + VZIP1 V3.S4, V2.S4, V18.S4 + VZIP2 V3.S4, V2.S4, V19.S4 + VZIP1 V5.S4, V4.S4, V20.S4 + VZIP2 V5.S4, V4.S4, V21.S4 + VZIP1 V7.S4, V6.S4, V22.S4 + VZIP2 V7.S4, V6.S4, V23.S4 + VZIP1 V9.S4, V8.S4, V24.S4 + VZIP2 V9.S4, V8.S4, V25.S4 + VZIP1 V11.S4, V10.S4, V26.S4 + VZIP2 V11.S4, V10.S4, V27.S4 + VZIP1 V13.S4, V12.S4, V28.S4 + VZIP2 V13.S4, V12.S4, V29.S4 + VZIP1 V15.S4, V14.S4, V30.S4 + VZIP2 V15.S4, V14.S4, V31.S4 + VZIP1 V18.D2, V16.D2, V0.D2 + VZIP2 V18.D2, V16.D2, V4.D2 + VZIP1 V19.D2, V17.D2, V8.D2 + VZIP2 V19.D2, V17.D2, V12.D2 + VLD1.P 64(R2), [V16.B16, V17.B16, V18.B16, V19.B16] + + VZIP1 V22.D2, V20.D2, V1.D2 + VZIP2 V22.D2, V20.D2, V5.D2 + VZIP1 V23.D2, V21.D2, V9.D2 + VZIP2 V23.D2, V21.D2, V13.D2 + VLD1.P 64(R2), [V20.B16, V21.B16, V22.B16, V23.B16] + VZIP1 V26.D2, V24.D2, V2.D2 + VZIP2 V26.D2, V24.D2, V6.D2 + VZIP1 V27.D2, V25.D2, V10.D2 + VZIP2 V27.D2, V25.D2, V14.D2 + VLD1.P 64(R2), [V24.B16, V25.B16, V26.B16, V27.B16] + VZIP1 V30.D2, V28.D2, V3.D2 + VZIP2 V30.D2, V28.D2, V7.D2 + VZIP1 V31.D2, V29.D2, V11.D2 + VZIP2 V31.D2, V29.D2, V15.D2 + VLD1.P 64(R2), [V28.B16, V29.B16, V30.B16, V31.B16] + VEOR V0.B16, V16.B16, V16.B16 + VEOR V1.B16, V17.B16, V17.B16 + VEOR V2.B16, V18.B16, V18.B16 + VEOR V3.B16, V19.B16, V19.B16 + VST1.P [V16.B16, V17.B16, V18.B16, V19.B16], 64(R1) + VEOR V4.B16, V20.B16, V20.B16 + VEOR V5.B16, V21.B16, V21.B16 + VEOR V6.B16, V22.B16, V22.B16 + VEOR V7.B16, V23.B16, V23.B16 + VST1.P [V20.B16, V21.B16, V22.B16, V23.B16], 64(R1) + VEOR V8.B16, V24.B16, V24.B16 + VEOR V9.B16, V25.B16, V25.B16 + VEOR V10.B16, V26.B16, V26.B16 + VEOR V11.B16, V27.B16, V27.B16 + VST1.P [V24.B16, V25.B16, V26.B16, V27.B16], 64(R1) + VEOR V12.B16, V28.B16, V28.B16 + VEOR V13.B16, V29.B16, V29.B16 + VEOR V14.B16, V30.B16, V30.B16 + VEOR V15.B16, V31.B16, V31.B16 + VST1.P [V28.B16, V29.B16, V30.B16, V31.B16], 64(R1) + + ADD $4, R20 + MOVW R20, (R7) // update counter + + CMP R2, R12 + BGT loop + + RET + + +DATA ·constants+0x00(SB)/4, $0x61707865 +DATA ·constants+0x04(SB)/4, $0x3320646e +DATA ·constants+0x08(SB)/4, $0x79622d32 +DATA ·constants+0x0c(SB)/4, $0x6b206574 +GLOBL ·constants(SB), NOPTR|RODATA, $32 + +DATA ·incRotMatrix+0x00(SB)/4, $0x00000000 +DATA ·incRotMatrix+0x04(SB)/4, $0x00000001 +DATA ·incRotMatrix+0x08(SB)/4, $0x00000002 +DATA ·incRotMatrix+0x0c(SB)/4, $0x00000003 +DATA ·incRotMatrix+0x10(SB)/4, $0x02010003 +DATA ·incRotMatrix+0x14(SB)/4, $0x06050407 +DATA ·incRotMatrix+0x18(SB)/4, $0x0A09080B +DATA ·incRotMatrix+0x1c(SB)/4, $0x0E0D0C0F +GLOBL ·incRotMatrix(SB), NOPTR|RODATA, $32 diff --git a/backend/vendor/golang.org/x/crypto/chacha20/chacha_generic.go b/backend/vendor/golang.org/x/crypto/chacha20/chacha_generic.go new file mode 100644 index 0000000..93eb5ae --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/chacha20/chacha_generic.go @@ -0,0 +1,398 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package chacha20 implements the ChaCha20 and XChaCha20 encryption algorithms +// as specified in RFC 8439 and draft-irtf-cfrg-xchacha-01. +package chacha20 + +import ( + "crypto/cipher" + "encoding/binary" + "errors" + "math/bits" + + "golang.org/x/crypto/internal/alias" +) + +const ( + // KeySize is the size of the key used by this cipher, in bytes. + KeySize = 32 + + // NonceSize is the size of the nonce used with the standard variant of this + // cipher, in bytes. + // + // Note that this is too short to be safely generated at random if the same + // key is reused more than 2³² times. + NonceSize = 12 + + // NonceSizeX is the size of the nonce used with the XChaCha20 variant of + // this cipher, in bytes. + NonceSizeX = 24 +) + +// Cipher is a stateful instance of ChaCha20 or XChaCha20 using a particular key +// and nonce. A *Cipher implements the cipher.Stream interface. +type Cipher struct { + // The ChaCha20 state is 16 words: 4 constant, 8 of key, 1 of counter + // (incremented after each block), and 3 of nonce. + key [8]uint32 + counter uint32 + nonce [3]uint32 + + // The last len bytes of buf are leftover key stream bytes from the previous + // XORKeyStream invocation. The size of buf depends on how many blocks are + // computed at a time by xorKeyStreamBlocks. + buf [bufSize]byte + len int + + // overflow is set when the counter overflowed, no more blocks can be + // generated, and the next XORKeyStream call should panic. + overflow bool + + // The counter-independent results of the first round are cached after they + // are computed the first time. + precompDone bool + p1, p5, p9, p13 uint32 + p2, p6, p10, p14 uint32 + p3, p7, p11, p15 uint32 +} + +var _ cipher.Stream = (*Cipher)(nil) + +// NewUnauthenticatedCipher creates a new ChaCha20 stream cipher with the given +// 32 bytes key and a 12 or 24 bytes nonce. If a nonce of 24 bytes is provided, +// the XChaCha20 construction will be used. It returns an error if key or nonce +// have any other length. +// +// Note that ChaCha20, like all stream ciphers, is not authenticated and allows +// attackers to silently tamper with the plaintext. For this reason, it is more +// appropriate as a building block than as a standalone encryption mechanism. +// Instead, consider using package golang.org/x/crypto/chacha20poly1305. +func NewUnauthenticatedCipher(key, nonce []byte) (*Cipher, error) { + // This function is split into a wrapper so that the Cipher allocation will + // be inlined, and depending on how the caller uses the return value, won't + // escape to the heap. + c := &Cipher{} + return newUnauthenticatedCipher(c, key, nonce) +} + +func newUnauthenticatedCipher(c *Cipher, key, nonce []byte) (*Cipher, error) { + if len(key) != KeySize { + return nil, errors.New("chacha20: wrong key size") + } + if len(nonce) == NonceSizeX { + // XChaCha20 uses the ChaCha20 core to mix 16 bytes of the nonce into a + // derived key, allowing it to operate on a nonce of 24 bytes. See + // draft-irtf-cfrg-xchacha-01, Section 2.3. + key, _ = HChaCha20(key, nonce[0:16]) + cNonce := make([]byte, NonceSize) + copy(cNonce[4:12], nonce[16:24]) + nonce = cNonce + } else if len(nonce) != NonceSize { + return nil, errors.New("chacha20: wrong nonce size") + } + + key, nonce = key[:KeySize], nonce[:NonceSize] // bounds check elimination hint + c.key = [8]uint32{ + binary.LittleEndian.Uint32(key[0:4]), + binary.LittleEndian.Uint32(key[4:8]), + binary.LittleEndian.Uint32(key[8:12]), + binary.LittleEndian.Uint32(key[12:16]), + binary.LittleEndian.Uint32(key[16:20]), + binary.LittleEndian.Uint32(key[20:24]), + binary.LittleEndian.Uint32(key[24:28]), + binary.LittleEndian.Uint32(key[28:32]), + } + c.nonce = [3]uint32{ + binary.LittleEndian.Uint32(nonce[0:4]), + binary.LittleEndian.Uint32(nonce[4:8]), + binary.LittleEndian.Uint32(nonce[8:12]), + } + return c, nil +} + +// The constant first 4 words of the ChaCha20 state. +const ( + j0 uint32 = 0x61707865 // expa + j1 uint32 = 0x3320646e // nd 3 + j2 uint32 = 0x79622d32 // 2-by + j3 uint32 = 0x6b206574 // te k +) + +const blockSize = 64 + +// quarterRound is the core of ChaCha20. It shuffles the bits of 4 state words. +// It's executed 4 times for each of the 20 ChaCha20 rounds, operating on all 16 +// words each round, in columnar or diagonal groups of 4 at a time. +func quarterRound(a, b, c, d uint32) (uint32, uint32, uint32, uint32) { + a += b + d ^= a + d = bits.RotateLeft32(d, 16) + c += d + b ^= c + b = bits.RotateLeft32(b, 12) + a += b + d ^= a + d = bits.RotateLeft32(d, 8) + c += d + b ^= c + b = bits.RotateLeft32(b, 7) + return a, b, c, d +} + +// SetCounter sets the Cipher counter. The next invocation of XORKeyStream will +// behave as if (64 * counter) bytes had been encrypted so far. +// +// To prevent accidental counter reuse, SetCounter panics if counter is less +// than the current value. +// +// Note that the execution time of XORKeyStream is not independent of the +// counter value. +func (s *Cipher) SetCounter(counter uint32) { + // Internally, s may buffer multiple blocks, which complicates this + // implementation slightly. When checking whether the counter has rolled + // back, we must use both s.counter and s.len to determine how many blocks + // we have already output. + outputCounter := s.counter - uint32(s.len)/blockSize + if s.overflow || counter < outputCounter { + panic("chacha20: SetCounter attempted to rollback counter") + } + + // In the general case, we set the new counter value and reset s.len to 0, + // causing the next call to XORKeyStream to refill the buffer. However, if + // we're advancing within the existing buffer, we can save work by simply + // setting s.len. + if counter < s.counter { + s.len = int(s.counter-counter) * blockSize + } else { + s.counter = counter + s.len = 0 + } +} + +// XORKeyStream XORs each byte in the given slice with a byte from the +// cipher's key stream. Dst and src must overlap entirely or not at all. +// +// If len(dst) < len(src), XORKeyStream will panic. It is acceptable +// to pass a dst bigger than src, and in that case, XORKeyStream will +// only update dst[:len(src)] and will not touch the rest of dst. +// +// Multiple calls to XORKeyStream behave as if the concatenation of +// the src buffers was passed in a single run. That is, Cipher +// maintains state and does not reset at each XORKeyStream call. +func (s *Cipher) XORKeyStream(dst, src []byte) { + if len(src) == 0 { + return + } + if len(dst) < len(src) { + panic("chacha20: output smaller than input") + } + dst = dst[:len(src)] + if alias.InexactOverlap(dst, src) { + panic("chacha20: invalid buffer overlap") + } + + // First, drain any remaining key stream from a previous XORKeyStream. + if s.len != 0 { + keyStream := s.buf[bufSize-s.len:] + if len(src) < len(keyStream) { + keyStream = keyStream[:len(src)] + } + _ = src[len(keyStream)-1] // bounds check elimination hint + for i, b := range keyStream { + dst[i] = src[i] ^ b + } + s.len -= len(keyStream) + dst, src = dst[len(keyStream):], src[len(keyStream):] + } + if len(src) == 0 { + return + } + + // If we'd need to let the counter overflow and keep generating output, + // panic immediately. If instead we'd only reach the last block, remember + // not to generate any more output after the buffer is drained. + numBlocks := (uint64(len(src)) + blockSize - 1) / blockSize + if s.overflow || uint64(s.counter)+numBlocks > 1<<32 { + panic("chacha20: counter overflow") + } else if uint64(s.counter)+numBlocks == 1<<32 { + s.overflow = true + } + + // xorKeyStreamBlocks implementations expect input lengths that are a + // multiple of bufSize. Platform-specific ones process multiple blocks at a + // time, so have bufSizes that are a multiple of blockSize. + + full := len(src) - len(src)%bufSize + if full > 0 { + s.xorKeyStreamBlocks(dst[:full], src[:full]) + } + dst, src = dst[full:], src[full:] + + // If using a multi-block xorKeyStreamBlocks would overflow, use the generic + // one that does one block at a time. + const blocksPerBuf = bufSize / blockSize + if uint64(s.counter)+blocksPerBuf > 1<<32 { + s.buf = [bufSize]byte{} + numBlocks := (len(src) + blockSize - 1) / blockSize + buf := s.buf[bufSize-numBlocks*blockSize:] + copy(buf, src) + s.xorKeyStreamBlocksGeneric(buf, buf) + s.len = len(buf) - copy(dst, buf) + return + } + + // If we have a partial (multi-)block, pad it for xorKeyStreamBlocks, and + // keep the leftover keystream for the next XORKeyStream invocation. + if len(src) > 0 { + s.buf = [bufSize]byte{} + copy(s.buf[:], src) + s.xorKeyStreamBlocks(s.buf[:], s.buf[:]) + s.len = bufSize - copy(dst, s.buf[:]) + } +} + +func (s *Cipher) xorKeyStreamBlocksGeneric(dst, src []byte) { + if len(dst) != len(src) || len(dst)%blockSize != 0 { + panic("chacha20: internal error: wrong dst and/or src length") + } + + // To generate each block of key stream, the initial cipher state + // (represented below) is passed through 20 rounds of shuffling, + // alternatively applying quarterRounds by columns (like 1, 5, 9, 13) + // or by diagonals (like 1, 6, 11, 12). + // + // 0:cccccccc 1:cccccccc 2:cccccccc 3:cccccccc + // 4:kkkkkkkk 5:kkkkkkkk 6:kkkkkkkk 7:kkkkkkkk + // 8:kkkkkkkk 9:kkkkkkkk 10:kkkkkkkk 11:kkkkkkkk + // 12:bbbbbbbb 13:nnnnnnnn 14:nnnnnnnn 15:nnnnnnnn + // + // c=constant k=key b=blockcount n=nonce + var ( + c0, c1, c2, c3 = j0, j1, j2, j3 + c4, c5, c6, c7 = s.key[0], s.key[1], s.key[2], s.key[3] + c8, c9, c10, c11 = s.key[4], s.key[5], s.key[6], s.key[7] + _, c13, c14, c15 = s.counter, s.nonce[0], s.nonce[1], s.nonce[2] + ) + + // Three quarters of the first round don't depend on the counter, so we can + // calculate them here, and reuse them for multiple blocks in the loop, and + // for future XORKeyStream invocations. + if !s.precompDone { + s.p1, s.p5, s.p9, s.p13 = quarterRound(c1, c5, c9, c13) + s.p2, s.p6, s.p10, s.p14 = quarterRound(c2, c6, c10, c14) + s.p3, s.p7, s.p11, s.p15 = quarterRound(c3, c7, c11, c15) + s.precompDone = true + } + + // A condition of len(src) > 0 would be sufficient, but this also + // acts as a bounds check elimination hint. + for len(src) >= 64 && len(dst) >= 64 { + // The remainder of the first column round. + fcr0, fcr4, fcr8, fcr12 := quarterRound(c0, c4, c8, s.counter) + + // The second diagonal round. + x0, x5, x10, x15 := quarterRound(fcr0, s.p5, s.p10, s.p15) + x1, x6, x11, x12 := quarterRound(s.p1, s.p6, s.p11, fcr12) + x2, x7, x8, x13 := quarterRound(s.p2, s.p7, fcr8, s.p13) + x3, x4, x9, x14 := quarterRound(s.p3, fcr4, s.p9, s.p14) + + // The remaining 18 rounds. + for i := 0; i < 9; i++ { + // Column round. + x0, x4, x8, x12 = quarterRound(x0, x4, x8, x12) + x1, x5, x9, x13 = quarterRound(x1, x5, x9, x13) + x2, x6, x10, x14 = quarterRound(x2, x6, x10, x14) + x3, x7, x11, x15 = quarterRound(x3, x7, x11, x15) + + // Diagonal round. + x0, x5, x10, x15 = quarterRound(x0, x5, x10, x15) + x1, x6, x11, x12 = quarterRound(x1, x6, x11, x12) + x2, x7, x8, x13 = quarterRound(x2, x7, x8, x13) + x3, x4, x9, x14 = quarterRound(x3, x4, x9, x14) + } + + // Add back the initial state to generate the key stream, then + // XOR the key stream with the source and write out the result. + addXor(dst[0:4], src[0:4], x0, c0) + addXor(dst[4:8], src[4:8], x1, c1) + addXor(dst[8:12], src[8:12], x2, c2) + addXor(dst[12:16], src[12:16], x3, c3) + addXor(dst[16:20], src[16:20], x4, c4) + addXor(dst[20:24], src[20:24], x5, c5) + addXor(dst[24:28], src[24:28], x6, c6) + addXor(dst[28:32], src[28:32], x7, c7) + addXor(dst[32:36], src[32:36], x8, c8) + addXor(dst[36:40], src[36:40], x9, c9) + addXor(dst[40:44], src[40:44], x10, c10) + addXor(dst[44:48], src[44:48], x11, c11) + addXor(dst[48:52], src[48:52], x12, s.counter) + addXor(dst[52:56], src[52:56], x13, c13) + addXor(dst[56:60], src[56:60], x14, c14) + addXor(dst[60:64], src[60:64], x15, c15) + + s.counter += 1 + + src, dst = src[blockSize:], dst[blockSize:] + } +} + +// HChaCha20 uses the ChaCha20 core to generate a derived key from a 32 bytes +// key and a 16 bytes nonce. It returns an error if key or nonce have any other +// length. It is used as part of the XChaCha20 construction. +func HChaCha20(key, nonce []byte) ([]byte, error) { + // This function is split into a wrapper so that the slice allocation will + // be inlined, and depending on how the caller uses the return value, won't + // escape to the heap. + out := make([]byte, 32) + return hChaCha20(out, key, nonce) +} + +func hChaCha20(out, key, nonce []byte) ([]byte, error) { + if len(key) != KeySize { + return nil, errors.New("chacha20: wrong HChaCha20 key size") + } + if len(nonce) != 16 { + return nil, errors.New("chacha20: wrong HChaCha20 nonce size") + } + + x0, x1, x2, x3 := j0, j1, j2, j3 + x4 := binary.LittleEndian.Uint32(key[0:4]) + x5 := binary.LittleEndian.Uint32(key[4:8]) + x6 := binary.LittleEndian.Uint32(key[8:12]) + x7 := binary.LittleEndian.Uint32(key[12:16]) + x8 := binary.LittleEndian.Uint32(key[16:20]) + x9 := binary.LittleEndian.Uint32(key[20:24]) + x10 := binary.LittleEndian.Uint32(key[24:28]) + x11 := binary.LittleEndian.Uint32(key[28:32]) + x12 := binary.LittleEndian.Uint32(nonce[0:4]) + x13 := binary.LittleEndian.Uint32(nonce[4:8]) + x14 := binary.LittleEndian.Uint32(nonce[8:12]) + x15 := binary.LittleEndian.Uint32(nonce[12:16]) + + for i := 0; i < 10; i++ { + // Diagonal round. + x0, x4, x8, x12 = quarterRound(x0, x4, x8, x12) + x1, x5, x9, x13 = quarterRound(x1, x5, x9, x13) + x2, x6, x10, x14 = quarterRound(x2, x6, x10, x14) + x3, x7, x11, x15 = quarterRound(x3, x7, x11, x15) + + // Column round. + x0, x5, x10, x15 = quarterRound(x0, x5, x10, x15) + x1, x6, x11, x12 = quarterRound(x1, x6, x11, x12) + x2, x7, x8, x13 = quarterRound(x2, x7, x8, x13) + x3, x4, x9, x14 = quarterRound(x3, x4, x9, x14) + } + + _ = out[31] // bounds check elimination hint + binary.LittleEndian.PutUint32(out[0:4], x0) + binary.LittleEndian.PutUint32(out[4:8], x1) + binary.LittleEndian.PutUint32(out[8:12], x2) + binary.LittleEndian.PutUint32(out[12:16], x3) + binary.LittleEndian.PutUint32(out[16:20], x12) + binary.LittleEndian.PutUint32(out[20:24], x13) + binary.LittleEndian.PutUint32(out[24:28], x14) + binary.LittleEndian.PutUint32(out[28:32], x15) + return out, nil +} diff --git a/backend/vendor/golang.org/x/crypto/chacha20/chacha_noasm.go b/backend/vendor/golang.org/x/crypto/chacha20/chacha_noasm.go new file mode 100644 index 0000000..c709b72 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/chacha20/chacha_noasm.go @@ -0,0 +1,13 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build (!arm64 && !s390x && !ppc64 && !ppc64le) || !gc || purego + +package chacha20 + +const bufSize = blockSize + +func (s *Cipher) xorKeyStreamBlocks(dst, src []byte) { + s.xorKeyStreamBlocksGeneric(dst, src) +} diff --git a/backend/vendor/golang.org/x/crypto/chacha20/chacha_ppc64x.go b/backend/vendor/golang.org/x/crypto/chacha20/chacha_ppc64x.go new file mode 100644 index 0000000..bd183d9 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/chacha20/chacha_ppc64x.go @@ -0,0 +1,16 @@ +// Copyright 2019 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build gc && !purego && (ppc64 || ppc64le) + +package chacha20 + +const bufSize = 256 + +//go:noescape +func chaCha20_ctr32_vsx(out, inp *byte, len int, key *[8]uint32, counter *uint32) + +func (c *Cipher) xorKeyStreamBlocks(dst, src []byte) { + chaCha20_ctr32_vsx(&dst[0], &src[0], len(src), &c.key, &c.counter) +} diff --git a/backend/vendor/golang.org/x/crypto/chacha20/chacha_ppc64x.s b/backend/vendor/golang.org/x/crypto/chacha20/chacha_ppc64x.s new file mode 100644 index 0000000..a660b41 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/chacha20/chacha_ppc64x.s @@ -0,0 +1,501 @@ +// Copyright 2019 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Based on CRYPTOGAMS code with the following comment: +// # ==================================================================== +// # Written by Andy Polyakov for the OpenSSL +// # project. The module is, however, dual licensed under OpenSSL and +// # CRYPTOGAMS licenses depending on where you obtain it. For further +// # details see http://www.openssl.org/~appro/cryptogams/. +// # ==================================================================== + +// Code for the perl script that generates the ppc64 assembler +// can be found in the cryptogams repository at the link below. It is based on +// the original from openssl. + +// https://github.com/dot-asm/cryptogams/commit/a60f5b50ed908e91 + +// The differences in this and the original implementation are +// due to the calling conventions and initialization of constants. + +//go:build gc && !purego && (ppc64 || ppc64le) + +#include "textflag.h" + +#define OUT R3 +#define INP R4 +#define LEN R5 +#define KEY R6 +#define CNT R7 +#define TMP R15 + +#define CONSTBASE R16 +#define BLOCKS R17 + +// for VPERMXOR +#define MASK R18 + +DATA consts<>+0x00(SB)/4, $0x61707865 +DATA consts<>+0x04(SB)/4, $0x3320646e +DATA consts<>+0x08(SB)/4, $0x79622d32 +DATA consts<>+0x0c(SB)/4, $0x6b206574 +DATA consts<>+0x10(SB)/4, $0x00000001 +DATA consts<>+0x14(SB)/4, $0x00000000 +DATA consts<>+0x18(SB)/4, $0x00000000 +DATA consts<>+0x1c(SB)/4, $0x00000000 +DATA consts<>+0x20(SB)/4, $0x00000004 +DATA consts<>+0x24(SB)/4, $0x00000000 +DATA consts<>+0x28(SB)/4, $0x00000000 +DATA consts<>+0x2c(SB)/4, $0x00000000 +DATA consts<>+0x30(SB)/4, $0x0e0f0c0d +DATA consts<>+0x34(SB)/4, $0x0a0b0809 +DATA consts<>+0x38(SB)/4, $0x06070405 +DATA consts<>+0x3c(SB)/4, $0x02030001 +DATA consts<>+0x40(SB)/4, $0x0d0e0f0c +DATA consts<>+0x44(SB)/4, $0x090a0b08 +DATA consts<>+0x48(SB)/4, $0x05060704 +DATA consts<>+0x4c(SB)/4, $0x01020300 +DATA consts<>+0x50(SB)/4, $0x61707865 +DATA consts<>+0x54(SB)/4, $0x61707865 +DATA consts<>+0x58(SB)/4, $0x61707865 +DATA consts<>+0x5c(SB)/4, $0x61707865 +DATA consts<>+0x60(SB)/4, $0x3320646e +DATA consts<>+0x64(SB)/4, $0x3320646e +DATA consts<>+0x68(SB)/4, $0x3320646e +DATA consts<>+0x6c(SB)/4, $0x3320646e +DATA consts<>+0x70(SB)/4, $0x79622d32 +DATA consts<>+0x74(SB)/4, $0x79622d32 +DATA consts<>+0x78(SB)/4, $0x79622d32 +DATA consts<>+0x7c(SB)/4, $0x79622d32 +DATA consts<>+0x80(SB)/4, $0x6b206574 +DATA consts<>+0x84(SB)/4, $0x6b206574 +DATA consts<>+0x88(SB)/4, $0x6b206574 +DATA consts<>+0x8c(SB)/4, $0x6b206574 +DATA consts<>+0x90(SB)/4, $0x00000000 +DATA consts<>+0x94(SB)/4, $0x00000001 +DATA consts<>+0x98(SB)/4, $0x00000002 +DATA consts<>+0x9c(SB)/4, $0x00000003 +DATA consts<>+0xa0(SB)/4, $0x11223300 +DATA consts<>+0xa4(SB)/4, $0x55667744 +DATA consts<>+0xa8(SB)/4, $0x99aabb88 +DATA consts<>+0xac(SB)/4, $0xddeeffcc +DATA consts<>+0xb0(SB)/4, $0x22330011 +DATA consts<>+0xb4(SB)/4, $0x66774455 +DATA consts<>+0xb8(SB)/4, $0xaabb8899 +DATA consts<>+0xbc(SB)/4, $0xeeffccdd +GLOBL consts<>(SB), RODATA, $0xc0 + +#ifdef GOARCH_ppc64 +#define BE_XXBRW_INIT() \ + LVSL (R0)(R0), V24 \ + VSPLTISB $3, V25 \ + VXOR V24, V25, V24 \ + +#define BE_XXBRW(vr) VPERM vr, vr, V24, vr +#else +#define BE_XXBRW_INIT() +#define BE_XXBRW(vr) +#endif + +//func chaCha20_ctr32_vsx(out, inp *byte, len int, key *[8]uint32, counter *uint32) +TEXT ·chaCha20_ctr32_vsx(SB),NOSPLIT,$64-40 + MOVD out+0(FP), OUT + MOVD inp+8(FP), INP + MOVD len+16(FP), LEN + MOVD key+24(FP), KEY + MOVD counter+32(FP), CNT + + // Addressing for constants + MOVD $consts<>+0x00(SB), CONSTBASE + MOVD $16, R8 + MOVD $32, R9 + MOVD $48, R10 + MOVD $64, R11 + SRD $6, LEN, BLOCKS + // for VPERMXOR + MOVD $consts<>+0xa0(SB), MASK + MOVD $16, R20 + // V16 + LXVW4X (CONSTBASE)(R0), VS48 + ADD $80,CONSTBASE + + // Load key into V17,V18 + LXVW4X (KEY)(R0), VS49 + LXVW4X (KEY)(R8), VS50 + + // Load CNT, NONCE into V19 + LXVW4X (CNT)(R0), VS51 + + // Clear V27 + VXOR V27, V27, V27 + + BE_XXBRW_INIT() + + // V28 + LXVW4X (CONSTBASE)(R11), VS60 + + // Load mask constants for VPERMXOR + LXVW4X (MASK)(R0), V20 + LXVW4X (MASK)(R20), V21 + + // splat slot from V19 -> V26 + VSPLTW $0, V19, V26 + + VSLDOI $4, V19, V27, V19 + VSLDOI $12, V27, V19, V19 + + VADDUWM V26, V28, V26 + + MOVD $10, R14 + MOVD R14, CTR + PCALIGN $16 +loop_outer_vsx: + // V0, V1, V2, V3 + LXVW4X (R0)(CONSTBASE), VS32 + LXVW4X (R8)(CONSTBASE), VS33 + LXVW4X (R9)(CONSTBASE), VS34 + LXVW4X (R10)(CONSTBASE), VS35 + + // splat values from V17, V18 into V4-V11 + VSPLTW $0, V17, V4 + VSPLTW $1, V17, V5 + VSPLTW $2, V17, V6 + VSPLTW $3, V17, V7 + VSPLTW $0, V18, V8 + VSPLTW $1, V18, V9 + VSPLTW $2, V18, V10 + VSPLTW $3, V18, V11 + + // VOR + VOR V26, V26, V12 + + // splat values from V19 -> V13, V14, V15 + VSPLTW $1, V19, V13 + VSPLTW $2, V19, V14 + VSPLTW $3, V19, V15 + + // splat const values + VSPLTISW $-16, V27 + VSPLTISW $12, V28 + VSPLTISW $8, V29 + VSPLTISW $7, V30 + PCALIGN $16 +loop_vsx: + VADDUWM V0, V4, V0 + VADDUWM V1, V5, V1 + VADDUWM V2, V6, V2 + VADDUWM V3, V7, V3 + + VPERMXOR V12, V0, V21, V12 + VPERMXOR V13, V1, V21, V13 + VPERMXOR V14, V2, V21, V14 + VPERMXOR V15, V3, V21, V15 + + VADDUWM V8, V12, V8 + VADDUWM V9, V13, V9 + VADDUWM V10, V14, V10 + VADDUWM V11, V15, V11 + + VXOR V4, V8, V4 + VXOR V5, V9, V5 + VXOR V6, V10, V6 + VXOR V7, V11, V7 + + VRLW V4, V28, V4 + VRLW V5, V28, V5 + VRLW V6, V28, V6 + VRLW V7, V28, V7 + + VADDUWM V0, V4, V0 + VADDUWM V1, V5, V1 + VADDUWM V2, V6, V2 + VADDUWM V3, V7, V3 + + VPERMXOR V12, V0, V20, V12 + VPERMXOR V13, V1, V20, V13 + VPERMXOR V14, V2, V20, V14 + VPERMXOR V15, V3, V20, V15 + + VADDUWM V8, V12, V8 + VADDUWM V9, V13, V9 + VADDUWM V10, V14, V10 + VADDUWM V11, V15, V11 + + VXOR V4, V8, V4 + VXOR V5, V9, V5 + VXOR V6, V10, V6 + VXOR V7, V11, V7 + + VRLW V4, V30, V4 + VRLW V5, V30, V5 + VRLW V6, V30, V6 + VRLW V7, V30, V7 + + VADDUWM V0, V5, V0 + VADDUWM V1, V6, V1 + VADDUWM V2, V7, V2 + VADDUWM V3, V4, V3 + + VPERMXOR V15, V0, V21, V15 + VPERMXOR V12, V1, V21, V12 + VPERMXOR V13, V2, V21, V13 + VPERMXOR V14, V3, V21, V14 + + VADDUWM V10, V15, V10 + VADDUWM V11, V12, V11 + VADDUWM V8, V13, V8 + VADDUWM V9, V14, V9 + + VXOR V5, V10, V5 + VXOR V6, V11, V6 + VXOR V7, V8, V7 + VXOR V4, V9, V4 + + VRLW V5, V28, V5 + VRLW V6, V28, V6 + VRLW V7, V28, V7 + VRLW V4, V28, V4 + + VADDUWM V0, V5, V0 + VADDUWM V1, V6, V1 + VADDUWM V2, V7, V2 + VADDUWM V3, V4, V3 + + VPERMXOR V15, V0, V20, V15 + VPERMXOR V12, V1, V20, V12 + VPERMXOR V13, V2, V20, V13 + VPERMXOR V14, V3, V20, V14 + + VADDUWM V10, V15, V10 + VADDUWM V11, V12, V11 + VADDUWM V8, V13, V8 + VADDUWM V9, V14, V9 + + VXOR V5, V10, V5 + VXOR V6, V11, V6 + VXOR V7, V8, V7 + VXOR V4, V9, V4 + + VRLW V5, V30, V5 + VRLW V6, V30, V6 + VRLW V7, V30, V7 + VRLW V4, V30, V4 + BDNZ loop_vsx + + VADDUWM V12, V26, V12 + + VMRGEW V0, V1, V27 + VMRGEW V2, V3, V28 + + VMRGOW V0, V1, V0 + VMRGOW V2, V3, V2 + + VMRGEW V4, V5, V29 + VMRGEW V6, V7, V30 + + XXPERMDI VS32, VS34, $0, VS33 + XXPERMDI VS32, VS34, $3, VS35 + XXPERMDI VS59, VS60, $0, VS32 + XXPERMDI VS59, VS60, $3, VS34 + + VMRGOW V4, V5, V4 + VMRGOW V6, V7, V6 + + VMRGEW V8, V9, V27 + VMRGEW V10, V11, V28 + + XXPERMDI VS36, VS38, $0, VS37 + XXPERMDI VS36, VS38, $3, VS39 + XXPERMDI VS61, VS62, $0, VS36 + XXPERMDI VS61, VS62, $3, VS38 + + VMRGOW V8, V9, V8 + VMRGOW V10, V11, V10 + + VMRGEW V12, V13, V29 + VMRGEW V14, V15, V30 + + XXPERMDI VS40, VS42, $0, VS41 + XXPERMDI VS40, VS42, $3, VS43 + XXPERMDI VS59, VS60, $0, VS40 + XXPERMDI VS59, VS60, $3, VS42 + + VMRGOW V12, V13, V12 + VMRGOW V14, V15, V14 + + VSPLTISW $4, V27 + VADDUWM V26, V27, V26 + + XXPERMDI VS44, VS46, $0, VS45 + XXPERMDI VS44, VS46, $3, VS47 + XXPERMDI VS61, VS62, $0, VS44 + XXPERMDI VS61, VS62, $3, VS46 + + VADDUWM V0, V16, V0 + VADDUWM V4, V17, V4 + VADDUWM V8, V18, V8 + VADDUWM V12, V19, V12 + + BE_XXBRW(V0) + BE_XXBRW(V4) + BE_XXBRW(V8) + BE_XXBRW(V12) + + CMPU LEN, $64 + BLT tail_vsx + + // Bottom of loop + LXVW4X (INP)(R0), VS59 + LXVW4X (INP)(R8), VS60 + LXVW4X (INP)(R9), VS61 + LXVW4X (INP)(R10), VS62 + + VXOR V27, V0, V27 + VXOR V28, V4, V28 + VXOR V29, V8, V29 + VXOR V30, V12, V30 + + STXVW4X VS59, (OUT)(R0) + STXVW4X VS60, (OUT)(R8) + ADD $64, INP + STXVW4X VS61, (OUT)(R9) + ADD $-64, LEN + STXVW4X VS62, (OUT)(R10) + ADD $64, OUT + BEQ done_vsx + + VADDUWM V1, V16, V0 + VADDUWM V5, V17, V4 + VADDUWM V9, V18, V8 + VADDUWM V13, V19, V12 + + BE_XXBRW(V0) + BE_XXBRW(V4) + BE_XXBRW(V8) + BE_XXBRW(V12) + + CMPU LEN, $64 + BLT tail_vsx + + LXVW4X (INP)(R0), VS59 + LXVW4X (INP)(R8), VS60 + LXVW4X (INP)(R9), VS61 + LXVW4X (INP)(R10), VS62 + + VXOR V27, V0, V27 + VXOR V28, V4, V28 + VXOR V29, V8, V29 + VXOR V30, V12, V30 + + STXVW4X VS59, (OUT)(R0) + STXVW4X VS60, (OUT)(R8) + ADD $64, INP + STXVW4X VS61, (OUT)(R9) + ADD $-64, LEN + STXVW4X VS62, (OUT)(V10) + ADD $64, OUT + BEQ done_vsx + + VADDUWM V2, V16, V0 + VADDUWM V6, V17, V4 + VADDUWM V10, V18, V8 + VADDUWM V14, V19, V12 + + BE_XXBRW(V0) + BE_XXBRW(V4) + BE_XXBRW(V8) + BE_XXBRW(V12) + + CMPU LEN, $64 + BLT tail_vsx + + LXVW4X (INP)(R0), VS59 + LXVW4X (INP)(R8), VS60 + LXVW4X (INP)(R9), VS61 + LXVW4X (INP)(R10), VS62 + + VXOR V27, V0, V27 + VXOR V28, V4, V28 + VXOR V29, V8, V29 + VXOR V30, V12, V30 + + STXVW4X VS59, (OUT)(R0) + STXVW4X VS60, (OUT)(R8) + ADD $64, INP + STXVW4X VS61, (OUT)(R9) + ADD $-64, LEN + STXVW4X VS62, (OUT)(R10) + ADD $64, OUT + BEQ done_vsx + + VADDUWM V3, V16, V0 + VADDUWM V7, V17, V4 + VADDUWM V11, V18, V8 + VADDUWM V15, V19, V12 + + BE_XXBRW(V0) + BE_XXBRW(V4) + BE_XXBRW(V8) + BE_XXBRW(V12) + + CMPU LEN, $64 + BLT tail_vsx + + LXVW4X (INP)(R0), VS59 + LXVW4X (INP)(R8), VS60 + LXVW4X (INP)(R9), VS61 + LXVW4X (INP)(R10), VS62 + + VXOR V27, V0, V27 + VXOR V28, V4, V28 + VXOR V29, V8, V29 + VXOR V30, V12, V30 + + STXVW4X VS59, (OUT)(R0) + STXVW4X VS60, (OUT)(R8) + ADD $64, INP + STXVW4X VS61, (OUT)(R9) + ADD $-64, LEN + STXVW4X VS62, (OUT)(R10) + ADD $64, OUT + + MOVD $10, R14 + MOVD R14, CTR + BNE loop_outer_vsx + +done_vsx: + // Increment counter by number of 64 byte blocks + MOVWZ (CNT), R14 + ADD BLOCKS, R14 + MOVWZ R14, (CNT) + RET + +tail_vsx: + ADD $32, R1, R11 + MOVD LEN, CTR + + // Save values on stack to copy from + STXVW4X VS32, (R11)(R0) + STXVW4X VS36, (R11)(R8) + STXVW4X VS40, (R11)(R9) + STXVW4X VS44, (R11)(R10) + ADD $-1, R11, R12 + ADD $-1, INP + ADD $-1, OUT + PCALIGN $16 +looptail_vsx: + // Copying the result to OUT + // in bytes. + MOVBZU 1(R12), KEY + MOVBZU 1(INP), TMP + XOR KEY, TMP, KEY + MOVBU KEY, 1(OUT) + BDNZ looptail_vsx + + // Clear the stack values + STXVW4X VS48, (R11)(R0) + STXVW4X VS48, (R11)(R8) + STXVW4X VS48, (R11)(R9) + STXVW4X VS48, (R11)(R10) + BR done_vsx diff --git a/backend/vendor/golang.org/x/crypto/chacha20/chacha_s390x.go b/backend/vendor/golang.org/x/crypto/chacha20/chacha_s390x.go new file mode 100644 index 0000000..683ccfd --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/chacha20/chacha_s390x.go @@ -0,0 +1,27 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build gc && !purego + +package chacha20 + +import "golang.org/x/sys/cpu" + +var haveAsm = cpu.S390X.HasVX + +const bufSize = 256 + +// xorKeyStreamVX is an assembly implementation of XORKeyStream. It must only +// be called when the vector facility is available. Implementation in asm_s390x.s. +// +//go:noescape +func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32) + +func (c *Cipher) xorKeyStreamBlocks(dst, src []byte) { + if cpu.S390X.HasVX { + xorKeyStreamVX(dst, src, &c.key, &c.nonce, &c.counter) + } else { + c.xorKeyStreamBlocksGeneric(dst, src) + } +} diff --git a/backend/vendor/golang.org/x/crypto/chacha20/chacha_s390x.s b/backend/vendor/golang.org/x/crypto/chacha20/chacha_s390x.s new file mode 100644 index 0000000..1eda91a --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/chacha20/chacha_s390x.s @@ -0,0 +1,224 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build gc && !purego + +#include "go_asm.h" +#include "textflag.h" + +// This is an implementation of the ChaCha20 encryption algorithm as +// specified in RFC 7539. It uses vector instructions to compute +// 4 keystream blocks in parallel (256 bytes) which are then XORed +// with the bytes in the input slice. + +GLOBL ·constants<>(SB), RODATA|NOPTR, $32 +// BSWAP: swap bytes in each 4-byte element +DATA ·constants<>+0x00(SB)/4, $0x03020100 +DATA ·constants<>+0x04(SB)/4, $0x07060504 +DATA ·constants<>+0x08(SB)/4, $0x0b0a0908 +DATA ·constants<>+0x0c(SB)/4, $0x0f0e0d0c +// J0: [j0, j1, j2, j3] +DATA ·constants<>+0x10(SB)/4, $0x61707865 +DATA ·constants<>+0x14(SB)/4, $0x3320646e +DATA ·constants<>+0x18(SB)/4, $0x79622d32 +DATA ·constants<>+0x1c(SB)/4, $0x6b206574 + +#define BSWAP V5 +#define J0 V6 +#define KEY0 V7 +#define KEY1 V8 +#define NONCE V9 +#define CTR V10 +#define M0 V11 +#define M1 V12 +#define M2 V13 +#define M3 V14 +#define INC V15 +#define X0 V16 +#define X1 V17 +#define X2 V18 +#define X3 V19 +#define X4 V20 +#define X5 V21 +#define X6 V22 +#define X7 V23 +#define X8 V24 +#define X9 V25 +#define X10 V26 +#define X11 V27 +#define X12 V28 +#define X13 V29 +#define X14 V30 +#define X15 V31 + +#define NUM_ROUNDS 20 + +#define ROUND4(a0, a1, a2, a3, b0, b1, b2, b3, c0, c1, c2, c3, d0, d1, d2, d3) \ + VAF a1, a0, a0 \ + VAF b1, b0, b0 \ + VAF c1, c0, c0 \ + VAF d1, d0, d0 \ + VX a0, a2, a2 \ + VX b0, b2, b2 \ + VX c0, c2, c2 \ + VX d0, d2, d2 \ + VERLLF $16, a2, a2 \ + VERLLF $16, b2, b2 \ + VERLLF $16, c2, c2 \ + VERLLF $16, d2, d2 \ + VAF a2, a3, a3 \ + VAF b2, b3, b3 \ + VAF c2, c3, c3 \ + VAF d2, d3, d3 \ + VX a3, a1, a1 \ + VX b3, b1, b1 \ + VX c3, c1, c1 \ + VX d3, d1, d1 \ + VERLLF $12, a1, a1 \ + VERLLF $12, b1, b1 \ + VERLLF $12, c1, c1 \ + VERLLF $12, d1, d1 \ + VAF a1, a0, a0 \ + VAF b1, b0, b0 \ + VAF c1, c0, c0 \ + VAF d1, d0, d0 \ + VX a0, a2, a2 \ + VX b0, b2, b2 \ + VX c0, c2, c2 \ + VX d0, d2, d2 \ + VERLLF $8, a2, a2 \ + VERLLF $8, b2, b2 \ + VERLLF $8, c2, c2 \ + VERLLF $8, d2, d2 \ + VAF a2, a3, a3 \ + VAF b2, b3, b3 \ + VAF c2, c3, c3 \ + VAF d2, d3, d3 \ + VX a3, a1, a1 \ + VX b3, b1, b1 \ + VX c3, c1, c1 \ + VX d3, d1, d1 \ + VERLLF $7, a1, a1 \ + VERLLF $7, b1, b1 \ + VERLLF $7, c1, c1 \ + VERLLF $7, d1, d1 + +#define PERMUTE(mask, v0, v1, v2, v3) \ + VPERM v0, v0, mask, v0 \ + VPERM v1, v1, mask, v1 \ + VPERM v2, v2, mask, v2 \ + VPERM v3, v3, mask, v3 + +#define ADDV(x, v0, v1, v2, v3) \ + VAF x, v0, v0 \ + VAF x, v1, v1 \ + VAF x, v2, v2 \ + VAF x, v3, v3 + +#define XORV(off, dst, src, v0, v1, v2, v3) \ + VLM off(src), M0, M3 \ + PERMUTE(BSWAP, v0, v1, v2, v3) \ + VX v0, M0, M0 \ + VX v1, M1, M1 \ + VX v2, M2, M2 \ + VX v3, M3, M3 \ + VSTM M0, M3, off(dst) + +#define SHUFFLE(a, b, c, d, t, u, v, w) \ + VMRHF a, c, t \ // t = {a[0], c[0], a[1], c[1]} + VMRHF b, d, u \ // u = {b[0], d[0], b[1], d[1]} + VMRLF a, c, v \ // v = {a[2], c[2], a[3], c[3]} + VMRLF b, d, w \ // w = {b[2], d[2], b[3], d[3]} + VMRHF t, u, a \ // a = {a[0], b[0], c[0], d[0]} + VMRLF t, u, b \ // b = {a[1], b[1], c[1], d[1]} + VMRHF v, w, c \ // c = {a[2], b[2], c[2], d[2]} + VMRLF v, w, d // d = {a[3], b[3], c[3], d[3]} + +// func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32) +TEXT ·xorKeyStreamVX(SB), NOSPLIT, $0 + MOVD $·constants<>(SB), R1 + MOVD dst+0(FP), R2 // R2=&dst[0] + LMG src+24(FP), R3, R4 // R3=&src[0] R4=len(src) + MOVD key+48(FP), R5 // R5=key + MOVD nonce+56(FP), R6 // R6=nonce + MOVD counter+64(FP), R7 // R7=counter + + // load BSWAP and J0 + VLM (R1), BSWAP, J0 + + // setup + MOVD $95, R0 + VLM (R5), KEY0, KEY1 + VLL R0, (R6), NONCE + VZERO M0 + VLEIB $7, $32, M0 + VSRLB M0, NONCE, NONCE + + // initialize counter values + VLREPF (R7), CTR + VZERO INC + VLEIF $1, $1, INC + VLEIF $2, $2, INC + VLEIF $3, $3, INC + VAF INC, CTR, CTR + VREPIF $4, INC + +chacha: + VREPF $0, J0, X0 + VREPF $1, J0, X1 + VREPF $2, J0, X2 + VREPF $3, J0, X3 + VREPF $0, KEY0, X4 + VREPF $1, KEY0, X5 + VREPF $2, KEY0, X6 + VREPF $3, KEY0, X7 + VREPF $0, KEY1, X8 + VREPF $1, KEY1, X9 + VREPF $2, KEY1, X10 + VREPF $3, KEY1, X11 + VLR CTR, X12 + VREPF $1, NONCE, X13 + VREPF $2, NONCE, X14 + VREPF $3, NONCE, X15 + + MOVD $(NUM_ROUNDS/2), R1 + +loop: + ROUND4(X0, X4, X12, X8, X1, X5, X13, X9, X2, X6, X14, X10, X3, X7, X15, X11) + ROUND4(X0, X5, X15, X10, X1, X6, X12, X11, X2, X7, X13, X8, X3, X4, X14, X9) + + ADD $-1, R1 + BNE loop + + // decrement length + ADD $-256, R4 + + // rearrange vectors + SHUFFLE(X0, X1, X2, X3, M0, M1, M2, M3) + ADDV(J0, X0, X1, X2, X3) + SHUFFLE(X4, X5, X6, X7, M0, M1, M2, M3) + ADDV(KEY0, X4, X5, X6, X7) + SHUFFLE(X8, X9, X10, X11, M0, M1, M2, M3) + ADDV(KEY1, X8, X9, X10, X11) + VAF CTR, X12, X12 + SHUFFLE(X12, X13, X14, X15, M0, M1, M2, M3) + ADDV(NONCE, X12, X13, X14, X15) + + // increment counters + VAF INC, CTR, CTR + + // xor keystream with plaintext + XORV(0*64, R2, R3, X0, X4, X8, X12) + XORV(1*64, R2, R3, X1, X5, X9, X13) + XORV(2*64, R2, R3, X2, X6, X10, X14) + XORV(3*64, R2, R3, X3, X7, X11, X15) + + // increment pointers + MOVD $256(R2), R2 + MOVD $256(R3), R3 + + CMPBNE R4, $0, chacha + + VSTEF $0, CTR, (R7) + RET diff --git a/backend/vendor/golang.org/x/crypto/chacha20/xor.go b/backend/vendor/golang.org/x/crypto/chacha20/xor.go new file mode 100644 index 0000000..c2d0485 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/chacha20/xor.go @@ -0,0 +1,42 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found src the LICENSE file. + +package chacha20 + +import "runtime" + +// Platforms that have fast unaligned 32-bit little endian accesses. +const unaligned = runtime.GOARCH == "386" || + runtime.GOARCH == "amd64" || + runtime.GOARCH == "arm64" || + runtime.GOARCH == "ppc64le" || + runtime.GOARCH == "s390x" + +// addXor reads a little endian uint32 from src, XORs it with (a + b) and +// places the result in little endian byte order in dst. +func addXor(dst, src []byte, a, b uint32) { + _, _ = src[3], dst[3] // bounds check elimination hint + if unaligned { + // The compiler should optimize this code into + // 32-bit unaligned little endian loads and stores. + // TODO: delete once the compiler does a reliably + // good job with the generic code below. + // See issue #25111 for more details. + v := uint32(src[0]) + v |= uint32(src[1]) << 8 + v |= uint32(src[2]) << 16 + v |= uint32(src[3]) << 24 + v ^= a + b + dst[0] = byte(v) + dst[1] = byte(v >> 8) + dst[2] = byte(v >> 16) + dst[3] = byte(v >> 24) + } else { + a += b + dst[0] = src[0] ^ byte(a) + dst[1] = src[1] ^ byte(a>>8) + dst[2] = src[2] ^ byte(a>>16) + dst[3] = src[3] ^ byte(a>>24) + } +} diff --git a/backend/vendor/golang.org/x/crypto/chacha20poly1305/chacha20poly1305.go b/backend/vendor/golang.org/x/crypto/chacha20poly1305/chacha20poly1305.go new file mode 100644 index 0000000..8cf5d81 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/chacha20poly1305/chacha20poly1305.go @@ -0,0 +1,98 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package chacha20poly1305 implements the ChaCha20-Poly1305 AEAD and its +// extended nonce variant XChaCha20-Poly1305, as specified in RFC 8439 and +// draft-irtf-cfrg-xchacha-01. +package chacha20poly1305 + +import ( + "crypto/cipher" + "errors" +) + +const ( + // KeySize is the size of the key used by this AEAD, in bytes. + KeySize = 32 + + // NonceSize is the size of the nonce used with the standard variant of this + // AEAD, in bytes. + // + // Note that this is too short to be safely generated at random if the same + // key is reused more than 2³² times. + NonceSize = 12 + + // NonceSizeX is the size of the nonce used with the XChaCha20-Poly1305 + // variant of this AEAD, in bytes. + NonceSizeX = 24 + + // Overhead is the size of the Poly1305 authentication tag, and the + // difference between a ciphertext length and its plaintext. + Overhead = 16 +) + +type chacha20poly1305 struct { + key [KeySize]byte +} + +// New returns a ChaCha20-Poly1305 AEAD that uses the given 256-bit key. +func New(key []byte) (cipher.AEAD, error) { + if len(key) != KeySize { + return nil, errors.New("chacha20poly1305: bad key length") + } + ret := new(chacha20poly1305) + copy(ret.key[:], key) + return ret, nil +} + +func (c *chacha20poly1305) NonceSize() int { + return NonceSize +} + +func (c *chacha20poly1305) Overhead() int { + return Overhead +} + +func (c *chacha20poly1305) Seal(dst, nonce, plaintext, additionalData []byte) []byte { + if len(nonce) != NonceSize { + panic("chacha20poly1305: bad nonce length passed to Seal") + } + + if uint64(len(plaintext)) > (1<<38)-64 { + panic("chacha20poly1305: plaintext too large") + } + + return c.seal(dst, nonce, plaintext, additionalData) +} + +var errOpen = errors.New("chacha20poly1305: message authentication failed") + +func (c *chacha20poly1305) Open(dst, nonce, ciphertext, additionalData []byte) ([]byte, error) { + if len(nonce) != NonceSize { + panic("chacha20poly1305: bad nonce length passed to Open") + } + if len(ciphertext) < 16 { + return nil, errOpen + } + if uint64(len(ciphertext)) > (1<<38)-48 { + panic("chacha20poly1305: ciphertext too large") + } + + return c.open(dst, nonce, ciphertext, additionalData) +} + +// sliceForAppend takes a slice and a requested number of bytes. It returns a +// slice with the contents of the given slice followed by that many bytes and a +// second slice that aliases into it and contains only the extra bytes. If the +// original slice has sufficient capacity then no allocation is performed. +func sliceForAppend(in []byte, n int) (head, tail []byte) { + if total := len(in) + n; cap(in) >= total { + head = in[:total] + } else { + head = make([]byte, total) + copy(head, in) + } + tail = head[len(in):] + return +} diff --git a/backend/vendor/golang.org/x/crypto/chacha20poly1305/chacha20poly1305_amd64.go b/backend/vendor/golang.org/x/crypto/chacha20poly1305/chacha20poly1305_amd64.go new file mode 100644 index 0000000..50695a1 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/chacha20poly1305/chacha20poly1305_amd64.go @@ -0,0 +1,86 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build gc && !purego + +package chacha20poly1305 + +import ( + "encoding/binary" + + "golang.org/x/crypto/internal/alias" + "golang.org/x/sys/cpu" +) + +//go:noescape +func chacha20Poly1305Open(dst []byte, key []uint32, src, ad []byte) bool + +//go:noescape +func chacha20Poly1305Seal(dst []byte, key []uint32, src, ad []byte) + +var ( + useAVX2 = cpu.X86.HasAVX2 && cpu.X86.HasBMI2 +) + +// setupState writes a ChaCha20 input matrix to state. See +// https://tools.ietf.org/html/rfc7539#section-2.3. +func setupState(state *[16]uint32, key *[32]byte, nonce []byte) { + state[0] = 0x61707865 + state[1] = 0x3320646e + state[2] = 0x79622d32 + state[3] = 0x6b206574 + + state[4] = binary.LittleEndian.Uint32(key[0:4]) + state[5] = binary.LittleEndian.Uint32(key[4:8]) + state[6] = binary.LittleEndian.Uint32(key[8:12]) + state[7] = binary.LittleEndian.Uint32(key[12:16]) + state[8] = binary.LittleEndian.Uint32(key[16:20]) + state[9] = binary.LittleEndian.Uint32(key[20:24]) + state[10] = binary.LittleEndian.Uint32(key[24:28]) + state[11] = binary.LittleEndian.Uint32(key[28:32]) + + state[12] = 0 + state[13] = binary.LittleEndian.Uint32(nonce[0:4]) + state[14] = binary.LittleEndian.Uint32(nonce[4:8]) + state[15] = binary.LittleEndian.Uint32(nonce[8:12]) +} + +func (c *chacha20poly1305) seal(dst, nonce, plaintext, additionalData []byte) []byte { + if !cpu.X86.HasSSSE3 { + return c.sealGeneric(dst, nonce, plaintext, additionalData) + } + + var state [16]uint32 + setupState(&state, &c.key, nonce) + + ret, out := sliceForAppend(dst, len(plaintext)+16) + if alias.InexactOverlap(out, plaintext) { + panic("chacha20poly1305: invalid buffer overlap") + } + chacha20Poly1305Seal(out[:], state[:], plaintext, additionalData) + return ret +} + +func (c *chacha20poly1305) open(dst, nonce, ciphertext, additionalData []byte) ([]byte, error) { + if !cpu.X86.HasSSSE3 { + return c.openGeneric(dst, nonce, ciphertext, additionalData) + } + + var state [16]uint32 + setupState(&state, &c.key, nonce) + + ciphertext = ciphertext[:len(ciphertext)-16] + ret, out := sliceForAppend(dst, len(ciphertext)) + if alias.InexactOverlap(out, ciphertext) { + panic("chacha20poly1305: invalid buffer overlap") + } + if !chacha20Poly1305Open(out, state[:], ciphertext, additionalData) { + for i := range out { + out[i] = 0 + } + return nil, errOpen + } + + return ret, nil +} diff --git a/backend/vendor/golang.org/x/crypto/chacha20poly1305/chacha20poly1305_amd64.s b/backend/vendor/golang.org/x/crypto/chacha20poly1305/chacha20poly1305_amd64.s new file mode 100644 index 0000000..fd5ee84 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/chacha20poly1305/chacha20poly1305_amd64.s @@ -0,0 +1,9762 @@ +// Code generated by command: go run chacha20poly1305_amd64_asm.go -out ../chacha20poly1305_amd64.s -pkg chacha20poly1305. DO NOT EDIT. + +//go:build gc && !purego + +#include "textflag.h" + +// func polyHashADInternal<>() +TEXT polyHashADInternal<>(SB), NOSPLIT, $0 + // Hack: Must declare #define macros inside of a function due to Avo constraints + // ROL rotates the uint32s in register R left by N bits, using temporary T. + #define ROL(N, R, T) \ + MOVO R, T; \ + PSLLL $(N), T; \ + PSRLL $(32-(N)), R; \ + PXOR T, R + + // ROL8 rotates the uint32s in register R left by 8, using temporary T if needed. + #ifdef GOAMD64_v2 + #define ROL8(R, T) PSHUFB ·rol8<>(SB), R + #else + #define ROL8(R, T) ROL(8, R, T) + #endif + + // ROL16 rotates the uint32s in register R left by 16, using temporary T if needed. + #ifdef GOAMD64_v2 + #define ROL16(R, T) PSHUFB ·rol16<>(SB), R + #else + #define ROL16(R, T) ROL(16, R, T) + #endif + XORQ R10, R10 + XORQ R11, R11 + XORQ R12, R12 + CMPQ R9, $0x0d + JNE hashADLoop + MOVQ (CX), R10 + MOVQ 5(CX), R11 + SHRQ $0x18, R11 + MOVQ $0x00000001, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + RET + +hashADLoop: + // Hash in 16 byte chunks + CMPQ R9, $0x10 + JB hashADTail + ADDQ (CX), R10 + ADCQ 8(CX), R11 + ADCQ $0x01, R12 + LEAQ 16(CX), CX + SUBQ $0x10, R9 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + JMP hashADLoop + +hashADTail: + CMPQ R9, $0x00 + JE hashADDone + + // Hash last < 16 byte tail + XORQ R13, R13 + XORQ R14, R14 + XORQ R15, R15 + ADDQ R9, CX + +hashADTailLoop: + SHLQ $0x08, R13, R14 + SHLQ $0x08, R13 + MOVB -1(CX), R15 + XORQ R15, R13 + DECQ CX + DECQ R9 + JNE hashADTailLoop + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + +hashADDone: + RET + +// func chacha20Poly1305Open(dst []byte, key []uint32, src []byte, ad []byte) bool +// Requires: AVX, AVX2, BMI2, CMOV, SSE2 +TEXT ·chacha20Poly1305Open(SB), $288-97 + // For aligned stack access + MOVQ SP, BP + ADDQ $0x20, BP + ANDQ $-32, BP + MOVQ dst_base+0(FP), DI + MOVQ key_base+24(FP), R8 + MOVQ src_base+48(FP), SI + MOVQ src_len+56(FP), BX + MOVQ ad_base+72(FP), CX + + // Check for AVX2 support + CMPB ·useAVX2+0(SB), $0x01 + JE chacha20Poly1305Open_AVX2 + + // Special optimization, for very short buffers + CMPQ BX, $0x80 + JBE openSSE128 + + // For long buffers, prepare the poly key first + MOVOU ·chacha20Constants<>+0(SB), X0 + MOVOU 16(R8), X3 + MOVOU 32(R8), X6 + MOVOU 48(R8), X9 + MOVO X9, X13 + + // Store state on stack for future use + MOVO X3, 32(BP) + MOVO X6, 48(BP) + MOVO X9, 128(BP) + MOVQ $0x0000000a, R9 + +openSSEPreparePolyKey: + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x0c + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x04 + DECQ R9 + JNE openSSEPreparePolyKey + + // A0|B0 hold the Poly1305 32-byte key, C0,D0 can be discarded + PADDL ·chacha20Constants<>+0(SB), X0 + PADDL 32(BP), X3 + + // Clamp and store the key + PAND ·polyClampMask<>+0(SB), X0 + MOVO X0, (BP) + MOVO X3, 16(BP) + + // Hash AAD + MOVQ ad_len+80(FP), R9 + CALL polyHashADInternal<>(SB) + +openSSEMainLoop: + CMPQ BX, $0x00000100 + JB openSSEMainLoopDone + + // Load state, increment counter blocks + MOVO ·chacha20Constants<>+0(SB), X0 + MOVO 32(BP), X3 + MOVO 48(BP), X6 + MOVO 128(BP), X9 + PADDL ·sseIncMask<>+0(SB), X9 + MOVO X0, X1 + MOVO X3, X4 + MOVO X6, X7 + MOVO X9, X10 + PADDL ·sseIncMask<>+0(SB), X10 + MOVO X1, X2 + MOVO X4, X5 + MOVO X7, X8 + MOVO X10, X11 + PADDL ·sseIncMask<>+0(SB), X11 + MOVO X2, X12 + MOVO X5, X13 + MOVO X8, X14 + MOVO X11, X15 + PADDL ·sseIncMask<>+0(SB), X15 + + // Store counters + MOVO X9, 80(BP) + MOVO X10, 96(BP) + MOVO X11, 112(BP) + MOVO X15, 128(BP) + + // There are 10 ChaCha20 iterations of 2QR each, so for 6 iterations we hash + // 2 blocks, and for the remaining 4 only 1 block - for a total of 16 + MOVQ $0x00000004, CX + MOVQ SI, R9 + +openSSEInternalLoop: + MOVO X14, 64(BP) + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X3 + PXOR X14, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X3 + PXOR X14, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X4 + PXOR X14, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X4 + PXOR X14, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X5 + PXOR X14, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X5 + PXOR X14, X5 + MOVO 64(BP), X14 + MOVO X7, 64(BP) + PADDD X13, X12 + PXOR X12, X15 + ROL16(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x0c, X7 + PSRLL $0x14, X13 + PXOR X7, X13 + PADDD X13, X12 + PXOR X12, X15 + ROL8(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x07, X7 + PSRLL $0x19, X13 + PXOR X7, X13 + MOVO 64(BP), X7 + ADDQ (R9), R10 + ADCQ 8(R9), R11 + ADCQ $0x01, R12 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x0c + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + LEAQ 16(R9), R9 + MOVO X14, 64(BP) + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X3 + PXOR X14, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X3 + PXOR X14, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X4 + PXOR X14, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X4 + PXOR X14, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X5 + PXOR X14, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X5 + PXOR X14, X5 + MOVO 64(BP), X14 + MOVO X7, 64(BP) + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + PADDD X13, X12 + PXOR X12, X15 + ROL16(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x0c, X7 + PSRLL $0x14, X13 + PXOR X7, X13 + PADDD X13, X12 + PXOR X12, X15 + ROL8(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x07, X7 + PSRLL $0x19, X13 + PXOR X7, X13 + MOVO 64(BP), X7 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x04 + DECQ CX + JGE openSSEInternalLoop + ADDQ (R9), R10 + ADCQ 8(R9), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(R9), R9 + CMPQ CX, $-6 + JG openSSEInternalLoop + + // Add in the state + PADDD ·chacha20Constants<>+0(SB), X0 + PADDD ·chacha20Constants<>+0(SB), X1 + PADDD ·chacha20Constants<>+0(SB), X2 + PADDD ·chacha20Constants<>+0(SB), X12 + PADDD 32(BP), X3 + PADDD 32(BP), X4 + PADDD 32(BP), X5 + PADDD 32(BP), X13 + PADDD 48(BP), X6 + PADDD 48(BP), X7 + PADDD 48(BP), X8 + PADDD 48(BP), X14 + PADDD 80(BP), X9 + PADDD 96(BP), X10 + PADDD 112(BP), X11 + PADDD 128(BP), X15 + + // Load - xor - store + MOVO X15, 64(BP) + MOVOU (SI), X15 + PXOR X15, X0 + MOVOU X0, (DI) + MOVOU 16(SI), X15 + PXOR X15, X3 + MOVOU X3, 16(DI) + MOVOU 32(SI), X15 + PXOR X15, X6 + MOVOU X6, 32(DI) + MOVOU 48(SI), X15 + PXOR X15, X9 + MOVOU X9, 48(DI) + MOVOU 64(SI), X9 + PXOR X9, X1 + MOVOU X1, 64(DI) + MOVOU 80(SI), X9 + PXOR X9, X4 + MOVOU X4, 80(DI) + MOVOU 96(SI), X9 + PXOR X9, X7 + MOVOU X7, 96(DI) + MOVOU 112(SI), X9 + PXOR X9, X10 + MOVOU X10, 112(DI) + MOVOU 128(SI), X9 + PXOR X9, X2 + MOVOU X2, 128(DI) + MOVOU 144(SI), X9 + PXOR X9, X5 + MOVOU X5, 144(DI) + MOVOU 160(SI), X9 + PXOR X9, X8 + MOVOU X8, 160(DI) + MOVOU 176(SI), X9 + PXOR X9, X11 + MOVOU X11, 176(DI) + MOVOU 192(SI), X9 + PXOR X9, X12 + MOVOU X12, 192(DI) + MOVOU 208(SI), X9 + PXOR X9, X13 + MOVOU X13, 208(DI) + MOVOU 224(SI), X9 + PXOR X9, X14 + MOVOU X14, 224(DI) + MOVOU 240(SI), X9 + PXOR 64(BP), X9 + MOVOU X9, 240(DI) + LEAQ 256(SI), SI + LEAQ 256(DI), DI + SUBQ $0x00000100, BX + JMP openSSEMainLoop + +openSSEMainLoopDone: + // Handle the various tail sizes efficiently + TESTQ BX, BX + JE openSSEFinalize + CMPQ BX, $0x40 + JBE openSSETail64 + CMPQ BX, $0x80 + JBE openSSETail128 + CMPQ BX, $0xc0 + JBE openSSETail192 + JMP openSSETail256 + +openSSEFinalize: + // Hash in the PT, AAD lengths + ADDQ ad_len+80(FP), R10 + ADCQ src_len+56(FP), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + + // Final reduce + MOVQ R10, R13 + MOVQ R11, R14 + MOVQ R12, R15 + SUBQ $-5, R10 + SBBQ $-1, R11 + SBBQ $0x03, R12 + CMOVQCS R13, R10 + CMOVQCS R14, R11 + CMOVQCS R15, R12 + + // Add in the "s" part of the key + ADDQ 16(BP), R10 + ADCQ 24(BP), R11 + + // Finally, constant time compare to the tag at the end of the message + XORQ AX, AX + MOVQ $0x00000001, DX + XORQ (SI), R10 + XORQ 8(SI), R11 + ORQ R11, R10 + CMOVQEQ DX, AX + + // Return true iff tags are equal + MOVB AX, ret+96(FP) + RET + +openSSE128: + MOVOU ·chacha20Constants<>+0(SB), X0 + MOVOU 16(R8), X3 + MOVOU 32(R8), X6 + MOVOU 48(R8), X9 + MOVO X0, X1 + MOVO X3, X4 + MOVO X6, X7 + MOVO X9, X10 + PADDL ·sseIncMask<>+0(SB), X10 + MOVO X1, X2 + MOVO X4, X5 + MOVO X7, X8 + MOVO X10, X11 + PADDL ·sseIncMask<>+0(SB), X11 + MOVO X3, X13 + MOVO X6, X14 + MOVO X10, X15 + MOVQ $0x0000000a, R9 + +openSSE128InnerCipherLoop: + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X4 + PXOR X12, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X4 + PXOR X12, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X5 + PXOR X12, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X5 + PXOR X12, X5 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X4 + PXOR X12, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X4 + PXOR X12, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X5 + PXOR X12, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X5 + PXOR X12, X5 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + DECQ R9 + JNE openSSE128InnerCipherLoop + + // A0|B0 hold the Poly1305 32-byte key, C0,D0 can be discarded + PADDL ·chacha20Constants<>+0(SB), X0 + PADDL ·chacha20Constants<>+0(SB), X1 + PADDL ·chacha20Constants<>+0(SB), X2 + PADDL X13, X3 + PADDL X13, X4 + PADDL X13, X5 + PADDL X14, X7 + PADDL X14, X8 + PADDL X15, X10 + PADDL ·sseIncMask<>+0(SB), X15 + PADDL X15, X11 + + // Clamp and store the key + PAND ·polyClampMask<>+0(SB), X0 + MOVOU X0, (BP) + MOVOU X3, 16(BP) + + // Hash + MOVQ ad_len+80(FP), R9 + CALL polyHashADInternal<>(SB) + +openSSE128Open: + CMPQ BX, $0x10 + JB openSSETail16 + SUBQ $0x10, BX + + // Load for hashing + ADDQ (SI), R10 + ADCQ 8(SI), R11 + ADCQ $0x01, R12 + + // Load for decryption + MOVOU (SI), X12 + PXOR X12, X1 + MOVOU X1, (DI) + LEAQ 16(SI), SI + LEAQ 16(DI), DI + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + + // Shift the stream "left" + MOVO X4, X1 + MOVO X7, X4 + MOVO X10, X7 + MOVO X2, X10 + MOVO X5, X2 + MOVO X8, X5 + MOVO X11, X8 + JMP openSSE128Open + +openSSETail16: + TESTQ BX, BX + JE openSSEFinalize + + // We can safely load the CT from the end, because it is padded with the MAC + MOVQ BX, R9 + SHLQ $0x04, R9 + LEAQ ·andMask<>+0(SB), R13 + MOVOU (SI), X12 + ADDQ BX, SI + PAND -16(R13)(R9*1), X12 + MOVO X12, 64(BP) + MOVQ X12, R13 + MOVQ 72(BP), R14 + PXOR X1, X12 + + // We can only store one byte at a time, since plaintext can be shorter than 16 bytes +openSSETail16Store: + MOVQ X12, R8 + MOVB R8, (DI) + PSRLDQ $0x01, X12 + INCQ DI + DECQ BX + JNE openSSETail16Store + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + JMP openSSEFinalize + +openSSETail64: + MOVO ·chacha20Constants<>+0(SB), X0 + MOVO 32(BP), X3 + MOVO 48(BP), X6 + MOVO 128(BP), X9 + PADDL ·sseIncMask<>+0(SB), X9 + MOVO X9, 80(BP) + XORQ R9, R9 + MOVQ BX, CX + CMPQ CX, $0x10 + JB openSSETail64LoopB + +openSSETail64LoopA: + ADDQ (SI)(R9*1), R10 + ADCQ 8(SI)(R9*1), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + SUBQ $0x10, CX + +openSSETail64LoopB: + ADDQ $0x10, R9 + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x0c + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x04 + CMPQ CX, $0x10 + JAE openSSETail64LoopA + CMPQ R9, $0xa0 + JNE openSSETail64LoopB + PADDL ·chacha20Constants<>+0(SB), X0 + PADDL 32(BP), X3 + PADDL 48(BP), X6 + PADDL 80(BP), X9 + +openSSETail64DecLoop: + CMPQ BX, $0x10 + JB openSSETail64DecLoopDone + SUBQ $0x10, BX + MOVOU (SI), X12 + PXOR X12, X0 + MOVOU X0, (DI) + LEAQ 16(SI), SI + LEAQ 16(DI), DI + MOVO X3, X0 + MOVO X6, X3 + MOVO X9, X6 + JMP openSSETail64DecLoop + +openSSETail64DecLoopDone: + MOVO X0, X1 + JMP openSSETail16 + +openSSETail128: + MOVO ·chacha20Constants<>+0(SB), X1 + MOVO 32(BP), X4 + MOVO 48(BP), X7 + MOVO 128(BP), X10 + PADDL ·sseIncMask<>+0(SB), X10 + MOVO X10, 80(BP) + MOVO X1, X0 + MOVO X4, X3 + MOVO X7, X6 + MOVO X10, X9 + PADDL ·sseIncMask<>+0(SB), X9 + MOVO X9, 96(BP) + XORQ R9, R9 + MOVQ BX, CX + ANDQ $-16, CX + +openSSETail128LoopA: + ADDQ (SI)(R9*1), R10 + ADCQ 8(SI)(R9*1), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + +openSSETail128LoopB: + ADDQ $0x10, R9 + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X4 + PXOR X12, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X4 + PXOR X12, X4 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x0c + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X4 + PXOR X12, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X4 + PXOR X12, X4 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x04 + CMPQ R9, CX + JB openSSETail128LoopA + CMPQ R9, $0xa0 + JNE openSSETail128LoopB + PADDL ·chacha20Constants<>+0(SB), X0 + PADDL ·chacha20Constants<>+0(SB), X1 + PADDL 32(BP), X3 + PADDL 32(BP), X4 + PADDL 48(BP), X6 + PADDL 48(BP), X7 + PADDL 96(BP), X9 + PADDL 80(BP), X10 + MOVOU (SI), X12 + MOVOU 16(SI), X13 + MOVOU 32(SI), X14 + MOVOU 48(SI), X15 + PXOR X12, X1 + PXOR X13, X4 + PXOR X14, X7 + PXOR X15, X10 + MOVOU X1, (DI) + MOVOU X4, 16(DI) + MOVOU X7, 32(DI) + MOVOU X10, 48(DI) + SUBQ $0x40, BX + LEAQ 64(SI), SI + LEAQ 64(DI), DI + JMP openSSETail64DecLoop + +openSSETail192: + MOVO ·chacha20Constants<>+0(SB), X2 + MOVO 32(BP), X5 + MOVO 48(BP), X8 + MOVO 128(BP), X11 + PADDL ·sseIncMask<>+0(SB), X11 + MOVO X11, 80(BP) + MOVO X2, X1 + MOVO X5, X4 + MOVO X8, X7 + MOVO X11, X10 + PADDL ·sseIncMask<>+0(SB), X10 + MOVO X10, 96(BP) + MOVO X1, X0 + MOVO X4, X3 + MOVO X7, X6 + MOVO X10, X9 + PADDL ·sseIncMask<>+0(SB), X9 + MOVO X9, 112(BP) + MOVQ BX, CX + MOVQ $0x000000a0, R9 + CMPQ CX, $0xa0 + CMOVQGT R9, CX + ANDQ $-16, CX + XORQ R9, R9 + +openSSLTail192LoopA: + ADDQ (SI)(R9*1), R10 + ADCQ 8(SI)(R9*1), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + +openSSLTail192LoopB: + ADDQ $0x10, R9 + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X4 + PXOR X12, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X4 + PXOR X12, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X5 + PXOR X12, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X5 + PXOR X12, X5 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X4 + PXOR X12, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X4 + PXOR X12, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X5 + PXOR X12, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X5 + PXOR X12, X5 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + CMPQ R9, CX + JB openSSLTail192LoopA + CMPQ R9, $0xa0 + JNE openSSLTail192LoopB + CMPQ BX, $0xb0 + JB openSSLTail192Store + ADDQ 160(SI), R10 + ADCQ 168(SI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + CMPQ BX, $0xc0 + JB openSSLTail192Store + ADDQ 176(SI), R10 + ADCQ 184(SI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + +openSSLTail192Store: + PADDL ·chacha20Constants<>+0(SB), X0 + PADDL ·chacha20Constants<>+0(SB), X1 + PADDL ·chacha20Constants<>+0(SB), X2 + PADDL 32(BP), X3 + PADDL 32(BP), X4 + PADDL 32(BP), X5 + PADDL 48(BP), X6 + PADDL 48(BP), X7 + PADDL 48(BP), X8 + PADDL 112(BP), X9 + PADDL 96(BP), X10 + PADDL 80(BP), X11 + MOVOU (SI), X12 + MOVOU 16(SI), X13 + MOVOU 32(SI), X14 + MOVOU 48(SI), X15 + PXOR X12, X2 + PXOR X13, X5 + PXOR X14, X8 + PXOR X15, X11 + MOVOU X2, (DI) + MOVOU X5, 16(DI) + MOVOU X8, 32(DI) + MOVOU X11, 48(DI) + MOVOU 64(SI), X12 + MOVOU 80(SI), X13 + MOVOU 96(SI), X14 + MOVOU 112(SI), X15 + PXOR X12, X1 + PXOR X13, X4 + PXOR X14, X7 + PXOR X15, X10 + MOVOU X1, 64(DI) + MOVOU X4, 80(DI) + MOVOU X7, 96(DI) + MOVOU X10, 112(DI) + SUBQ $0x80, BX + LEAQ 128(SI), SI + LEAQ 128(DI), DI + JMP openSSETail64DecLoop + +openSSETail256: + MOVO ·chacha20Constants<>+0(SB), X0 + MOVO 32(BP), X3 + MOVO 48(BP), X6 + MOVO 128(BP), X9 + PADDL ·sseIncMask<>+0(SB), X9 + MOVO X0, X1 + MOVO X3, X4 + MOVO X6, X7 + MOVO X9, X10 + PADDL ·sseIncMask<>+0(SB), X10 + MOVO X1, X2 + MOVO X4, X5 + MOVO X7, X8 + MOVO X10, X11 + PADDL ·sseIncMask<>+0(SB), X11 + MOVO X2, X12 + MOVO X5, X13 + MOVO X8, X14 + MOVO X11, X15 + PADDL ·sseIncMask<>+0(SB), X15 + + // Store counters + MOVO X9, 80(BP) + MOVO X10, 96(BP) + MOVO X11, 112(BP) + MOVO X15, 128(BP) + XORQ R9, R9 + +openSSETail256Loop: + ADDQ (SI)(R9*1), R10 + ADCQ 8(SI)(R9*1), R11 + ADCQ $0x01, R12 + MOVO X14, 64(BP) + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X3 + PXOR X14, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X3 + PXOR X14, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X4 + PXOR X14, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X4 + PXOR X14, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X5 + PXOR X14, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X5 + PXOR X14, X5 + MOVO 64(BP), X14 + MOVO X7, 64(BP) + PADDD X13, X12 + PXOR X12, X15 + ROL16(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x0c, X7 + PSRLL $0x14, X13 + PXOR X7, X13 + PADDD X13, X12 + PXOR X12, X15 + ROL8(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x07, X7 + PSRLL $0x19, X13 + PXOR X7, X13 + MOVO 64(BP), X7 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x0c + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + MOVO X14, 64(BP) + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X3 + PXOR X14, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X3 + PXOR X14, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X4 + PXOR X14, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X4 + PXOR X14, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X5 + PXOR X14, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X5 + PXOR X14, X5 + MOVO 64(BP), X14 + MOVO X7, 64(BP) + PADDD X13, X12 + PXOR X12, X15 + ROL16(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x0c, X7 + PSRLL $0x14, X13 + PXOR X7, X13 + PADDD X13, X12 + PXOR X12, X15 + ROL8(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x07, X7 + PSRLL $0x19, X13 + PXOR X7, X13 + MOVO 64(BP), X7 + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x04 + ADDQ $0x10, R9 + CMPQ R9, $0xa0 + JB openSSETail256Loop + MOVQ BX, CX + ANDQ $-16, CX + +openSSETail256HashLoop: + ADDQ (SI)(R9*1), R10 + ADCQ 8(SI)(R9*1), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + ADDQ $0x10, R9 + CMPQ R9, CX + JB openSSETail256HashLoop + + // Add in the state + PADDD ·chacha20Constants<>+0(SB), X0 + PADDD ·chacha20Constants<>+0(SB), X1 + PADDD ·chacha20Constants<>+0(SB), X2 + PADDD ·chacha20Constants<>+0(SB), X12 + PADDD 32(BP), X3 + PADDD 32(BP), X4 + PADDD 32(BP), X5 + PADDD 32(BP), X13 + PADDD 48(BP), X6 + PADDD 48(BP), X7 + PADDD 48(BP), X8 + PADDD 48(BP), X14 + PADDD 80(BP), X9 + PADDD 96(BP), X10 + PADDD 112(BP), X11 + PADDD 128(BP), X15 + MOVO X15, 64(BP) + + // Load - xor - store + MOVOU (SI), X15 + PXOR X15, X0 + MOVOU 16(SI), X15 + PXOR X15, X3 + MOVOU 32(SI), X15 + PXOR X15, X6 + MOVOU 48(SI), X15 + PXOR X15, X9 + MOVOU X0, (DI) + MOVOU X3, 16(DI) + MOVOU X6, 32(DI) + MOVOU X9, 48(DI) + MOVOU 64(SI), X0 + MOVOU 80(SI), X3 + MOVOU 96(SI), X6 + MOVOU 112(SI), X9 + PXOR X0, X1 + PXOR X3, X4 + PXOR X6, X7 + PXOR X9, X10 + MOVOU X1, 64(DI) + MOVOU X4, 80(DI) + MOVOU X7, 96(DI) + MOVOU X10, 112(DI) + MOVOU 128(SI), X0 + MOVOU 144(SI), X3 + MOVOU 160(SI), X6 + MOVOU 176(SI), X9 + PXOR X0, X2 + PXOR X3, X5 + PXOR X6, X8 + PXOR X9, X11 + MOVOU X2, 128(DI) + MOVOU X5, 144(DI) + MOVOU X8, 160(DI) + MOVOU X11, 176(DI) + LEAQ 192(SI), SI + LEAQ 192(DI), DI + SUBQ $0xc0, BX + MOVO X12, X0 + MOVO X13, X3 + MOVO X14, X6 + MOVO 64(BP), X9 + JMP openSSETail64DecLoop + +chacha20Poly1305Open_AVX2: + VZEROUPPER + VMOVDQU ·chacha20Constants<>+0(SB), Y0 + BYTE $0xc4 + BYTE $0x42 + BYTE $0x7d + BYTE $0x5a + BYTE $0x70 + BYTE $0x10 + BYTE $0xc4 + BYTE $0x42 + BYTE $0x7d + BYTE $0x5a + BYTE $0x60 + BYTE $0x20 + BYTE $0xc4 + BYTE $0xc2 + BYTE $0x7d + BYTE $0x5a + BYTE $0x60 + BYTE $0x30 + VPADDD ·avx2InitMask<>+0(SB), Y4, Y4 + + // Special optimization, for very short buffers + CMPQ BX, $0xc0 + JBE openAVX2192 + CMPQ BX, $0x00000140 + JBE openAVX2320 + + // For the general key prepare the key first - as a byproduct we have 64 bytes of cipher stream + VMOVDQA Y14, 32(BP) + VMOVDQA Y12, 64(BP) + VMOVDQA Y4, 192(BP) + MOVQ $0x0000000a, R9 + +openAVX2PreparePolyKey: + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x04, Y4, Y4, Y4 + DECQ R9 + JNE openAVX2PreparePolyKey + VPADDD ·chacha20Constants<>+0(SB), Y0, Y0 + VPADDD 32(BP), Y14, Y14 + VPADDD 64(BP), Y12, Y12 + VPADDD 192(BP), Y4, Y4 + VPERM2I128 $0x02, Y0, Y14, Y3 + + // Clamp and store poly key + VPAND ·polyClampMask<>+0(SB), Y3, Y3 + VMOVDQA Y3, (BP) + + // Stream for the first 64 bytes + VPERM2I128 $0x13, Y0, Y14, Y0 + VPERM2I128 $0x13, Y12, Y4, Y14 + + // Hash AD + first 64 bytes + MOVQ ad_len+80(FP), R9 + CALL polyHashADInternal<>(SB) + XORQ CX, CX + +openAVX2InitialHash64: + ADDQ (SI)(CX*1), R10 + ADCQ 8(SI)(CX*1), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + ADDQ $0x10, CX + CMPQ CX, $0x40 + JNE openAVX2InitialHash64 + + // Decrypt the first 64 bytes + VPXOR (SI), Y0, Y0 + VPXOR 32(SI), Y14, Y14 + VMOVDQU Y0, (DI) + VMOVDQU Y14, 32(DI) + LEAQ 64(SI), SI + LEAQ 64(DI), DI + SUBQ $0x40, BX + +openAVX2MainLoop: + CMPQ BX, $0x00000200 + JB openAVX2MainLoopDone + + // Load state, increment counter blocks, store the incremented counters + VMOVDQU ·chacha20Constants<>+0(SB), Y0 + VMOVDQA Y0, Y5 + VMOVDQA Y0, Y6 + VMOVDQA Y0, Y7 + VMOVDQA 32(BP), Y14 + VMOVDQA Y14, Y9 + VMOVDQA Y14, Y10 + VMOVDQA Y14, Y11 + VMOVDQA 64(BP), Y12 + VMOVDQA Y12, Y13 + VMOVDQA Y12, Y8 + VMOVDQA Y12, Y15 + VMOVDQA 192(BP), Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y1 + VPADDD ·avx2IncMask<>+0(SB), Y1, Y2 + VPADDD ·avx2IncMask<>+0(SB), Y2, Y3 + VMOVDQA Y4, 96(BP) + VMOVDQA Y1, 128(BP) + VMOVDQA Y2, 160(BP) + VMOVDQA Y3, 192(BP) + XORQ CX, CX + +openAVX2InternalLoop: + ADDQ (SI)(CX*1), R10 + ADCQ 8(SI)(CX*1), R11 + ADCQ $0x01, R12 + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y3, Y3 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + VMOVDQA Y15, 224(BP) + VPSLLD $0x0c, Y14, Y15 + VPSRLD $0x14, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x0c, Y9, Y15 + VPSRLD $0x14, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x0c, Y10, Y15 + VPSRLD $0x14, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x0c, Y11, Y15 + VPSRLD $0x14, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y3, Y3 + ADDQ 16(SI)(CX*1), R10 + ADCQ 24(SI)(CX*1), R11 + ADCQ $0x01, R12 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + VMOVDQA Y15, 224(BP) + VPSLLD $0x07, Y14, Y15 + VPSRLD $0x19, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x07, Y9, Y15 + VPSRLD $0x19, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x07, Y10, Y15 + VPSRLD $0x19, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x07, Y11, Y15 + VPSRLD $0x19, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x04, Y9, Y9, Y9 + VPALIGNR $0x04, Y10, Y10, Y10 + VPALIGNR $0x04, Y11, Y11, Y11 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x08, Y15, Y15, Y15 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPALIGNR $0x0c, Y1, Y1, Y1 + VPALIGNR $0x0c, Y2, Y2, Y2 + VPALIGNR $0x0c, Y3, Y3, Y3 + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y3, Y3 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + ADDQ 32(SI)(CX*1), R10 + ADCQ 40(SI)(CX*1), R11 + ADCQ $0x01, R12 + LEAQ 48(CX), CX + VMOVDQA Y15, 224(BP) + VPSLLD $0x0c, Y14, Y15 + VPSRLD $0x14, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x0c, Y9, Y15 + VPSRLD $0x14, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x0c, Y10, Y15 + VPSRLD $0x14, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x0c, Y11, Y15 + VPSRLD $0x14, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y3, Y3 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + VMOVDQA Y15, 224(BP) + VPSLLD $0x07, Y14, Y15 + VPSRLD $0x19, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x07, Y9, Y15 + VPSRLD $0x19, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x07, Y10, Y15 + VPSRLD $0x19, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x07, Y11, Y15 + VPSRLD $0x19, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x0c, Y9, Y9, Y9 + VPALIGNR $0x0c, Y10, Y10, Y10 + VPALIGNR $0x0c, Y11, Y11, Y11 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x08, Y15, Y15, Y15 + VPALIGNR $0x04, Y4, Y4, Y4 + VPALIGNR $0x04, Y1, Y1, Y1 + VPALIGNR $0x04, Y2, Y2, Y2 + VPALIGNR $0x04, Y3, Y3, Y3 + CMPQ CX, $0x000001e0 + JNE openAVX2InternalLoop + VPADDD ·chacha20Constants<>+0(SB), Y0, Y0 + VPADDD ·chacha20Constants<>+0(SB), Y5, Y5 + VPADDD ·chacha20Constants<>+0(SB), Y6, Y6 + VPADDD ·chacha20Constants<>+0(SB), Y7, Y7 + VPADDD 32(BP), Y14, Y14 + VPADDD 32(BP), Y9, Y9 + VPADDD 32(BP), Y10, Y10 + VPADDD 32(BP), Y11, Y11 + VPADDD 64(BP), Y12, Y12 + VPADDD 64(BP), Y13, Y13 + VPADDD 64(BP), Y8, Y8 + VPADDD 64(BP), Y15, Y15 + VPADDD 96(BP), Y4, Y4 + VPADDD 128(BP), Y1, Y1 + VPADDD 160(BP), Y2, Y2 + VPADDD 192(BP), Y3, Y3 + VMOVDQA Y15, 224(BP) + + // We only hashed 480 of the 512 bytes available - hash the remaining 32 here + ADDQ 480(SI), R10 + ADCQ 488(SI), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + VPERM2I128 $0x02, Y0, Y14, Y15 + VPERM2I128 $0x13, Y0, Y14, Y14 + VPERM2I128 $0x02, Y12, Y4, Y0 + VPERM2I128 $0x13, Y12, Y4, Y12 + VPXOR (SI), Y15, Y15 + VPXOR 32(SI), Y0, Y0 + VPXOR 64(SI), Y14, Y14 + VPXOR 96(SI), Y12, Y12 + VMOVDQU Y15, (DI) + VMOVDQU Y0, 32(DI) + VMOVDQU Y14, 64(DI) + VMOVDQU Y12, 96(DI) + VPERM2I128 $0x02, Y5, Y9, Y0 + VPERM2I128 $0x02, Y13, Y1, Y14 + VPERM2I128 $0x13, Y5, Y9, Y12 + VPERM2I128 $0x13, Y13, Y1, Y4 + VPXOR 128(SI), Y0, Y0 + VPXOR 160(SI), Y14, Y14 + VPXOR 192(SI), Y12, Y12 + VPXOR 224(SI), Y4, Y4 + VMOVDQU Y0, 128(DI) + VMOVDQU Y14, 160(DI) + VMOVDQU Y12, 192(DI) + VMOVDQU Y4, 224(DI) + + // and here + ADDQ 496(SI), R10 + ADCQ 504(SI), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + VPERM2I128 $0x02, Y6, Y10, Y0 + VPERM2I128 $0x02, Y8, Y2, Y14 + VPERM2I128 $0x13, Y6, Y10, Y12 + VPERM2I128 $0x13, Y8, Y2, Y4 + VPXOR 256(SI), Y0, Y0 + VPXOR 288(SI), Y14, Y14 + VPXOR 320(SI), Y12, Y12 + VPXOR 352(SI), Y4, Y4 + VMOVDQU Y0, 256(DI) + VMOVDQU Y14, 288(DI) + VMOVDQU Y12, 320(DI) + VMOVDQU Y4, 352(DI) + VPERM2I128 $0x02, Y7, Y11, Y0 + VPERM2I128 $0x02, 224(BP), Y3, Y14 + VPERM2I128 $0x13, Y7, Y11, Y12 + VPERM2I128 $0x13, 224(BP), Y3, Y4 + VPXOR 384(SI), Y0, Y0 + VPXOR 416(SI), Y14, Y14 + VPXOR 448(SI), Y12, Y12 + VPXOR 480(SI), Y4, Y4 + VMOVDQU Y0, 384(DI) + VMOVDQU Y14, 416(DI) + VMOVDQU Y12, 448(DI) + VMOVDQU Y4, 480(DI) + LEAQ 512(SI), SI + LEAQ 512(DI), DI + SUBQ $0x00000200, BX + JMP openAVX2MainLoop + +openAVX2MainLoopDone: + // Handle the various tail sizes efficiently + TESTQ BX, BX + JE openSSEFinalize + CMPQ BX, $0x80 + JBE openAVX2Tail128 + CMPQ BX, $0x00000100 + JBE openAVX2Tail256 + CMPQ BX, $0x00000180 + JBE openAVX2Tail384 + JMP openAVX2Tail512 + +openAVX2192: + VMOVDQA Y0, Y5 + VMOVDQA Y14, Y9 + VMOVDQA Y12, Y13 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y1 + VMOVDQA Y0, Y6 + VMOVDQA Y14, Y10 + VMOVDQA Y12, Y8 + VMOVDQA Y4, Y2 + VMOVDQA Y1, Y15 + MOVQ $0x0000000a, R9 + +openAVX2192InnerCipherLoop: + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x04, Y9, Y9, Y9 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPALIGNR $0x0c, Y1, Y1, Y1 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x0c, Y9, Y9, Y9 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x04, Y4, Y4, Y4 + VPALIGNR $0x04, Y1, Y1, Y1 + DECQ R9 + JNE openAVX2192InnerCipherLoop + VPADDD Y6, Y0, Y0 + VPADDD Y6, Y5, Y5 + VPADDD Y10, Y14, Y14 + VPADDD Y10, Y9, Y9 + VPADDD Y8, Y12, Y12 + VPADDD Y8, Y13, Y13 + VPADDD Y2, Y4, Y4 + VPADDD Y15, Y1, Y1 + VPERM2I128 $0x02, Y0, Y14, Y3 + + // Clamp and store poly key + VPAND ·polyClampMask<>+0(SB), Y3, Y3 + VMOVDQA Y3, (BP) + + // Stream for up to 192 bytes + VPERM2I128 $0x13, Y0, Y14, Y0 + VPERM2I128 $0x13, Y12, Y4, Y14 + VPERM2I128 $0x02, Y5, Y9, Y12 + VPERM2I128 $0x02, Y13, Y1, Y4 + VPERM2I128 $0x13, Y5, Y9, Y5 + VPERM2I128 $0x13, Y13, Y1, Y9 + +openAVX2ShortOpen: + // Hash + MOVQ ad_len+80(FP), R9 + CALL polyHashADInternal<>(SB) + +openAVX2ShortOpenLoop: + CMPQ BX, $0x20 + JB openAVX2ShortTail32 + SUBQ $0x20, BX + + // Load for hashing + ADDQ (SI), R10 + ADCQ 8(SI), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + ADDQ 16(SI), R10 + ADCQ 24(SI), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + + // Load for decryption + VPXOR (SI), Y0, Y0 + VMOVDQU Y0, (DI) + LEAQ 32(SI), SI + LEAQ 32(DI), DI + + // Shift stream left + VMOVDQA Y14, Y0 + VMOVDQA Y12, Y14 + VMOVDQA Y4, Y12 + VMOVDQA Y5, Y4 + VMOVDQA Y9, Y5 + VMOVDQA Y13, Y9 + VMOVDQA Y1, Y13 + VMOVDQA Y6, Y1 + VMOVDQA Y10, Y6 + JMP openAVX2ShortOpenLoop + +openAVX2ShortTail32: + CMPQ BX, $0x10 + VMOVDQA X0, X1 + JB openAVX2ShortDone + SUBQ $0x10, BX + + // Load for hashing + ADDQ (SI), R10 + ADCQ 8(SI), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + + // Load for decryption + VPXOR (SI), X0, X12 + VMOVDQU X12, (DI) + LEAQ 16(SI), SI + LEAQ 16(DI), DI + VPERM2I128 $0x11, Y0, Y0, Y0 + VMOVDQA X0, X1 + +openAVX2ShortDone: + VZEROUPPER + JMP openSSETail16 + +openAVX2320: + VMOVDQA Y0, Y5 + VMOVDQA Y14, Y9 + VMOVDQA Y12, Y13 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y1 + VMOVDQA Y0, Y6 + VMOVDQA Y14, Y10 + VMOVDQA Y12, Y8 + VPADDD ·avx2IncMask<>+0(SB), Y1, Y2 + VMOVDQA Y14, Y7 + VMOVDQA Y12, Y11 + VMOVDQA Y4, Y15 + MOVQ $0x0000000a, R9 + +openAVX2320InnerCipherLoop: + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x0c, Y10, Y3 + VPSRLD $0x14, Y10, Y10 + VPXOR Y3, Y10, Y10 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x07, Y10, Y3 + VPSRLD $0x19, Y10, Y10 + VPXOR Y3, Y10, Y10 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x04, Y9, Y9, Y9 + VPALIGNR $0x04, Y10, Y10, Y10 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPALIGNR $0x0c, Y1, Y1, Y1 + VPALIGNR $0x0c, Y2, Y2, Y2 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x0c, Y10, Y3 + VPSRLD $0x14, Y10, Y10 + VPXOR Y3, Y10, Y10 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x07, Y10, Y3 + VPSRLD $0x19, Y10, Y10 + VPXOR Y3, Y10, Y10 + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x0c, Y9, Y9, Y9 + VPALIGNR $0x0c, Y10, Y10, Y10 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x04, Y4, Y4, Y4 + VPALIGNR $0x04, Y1, Y1, Y1 + VPALIGNR $0x04, Y2, Y2, Y2 + DECQ R9 + JNE openAVX2320InnerCipherLoop + VMOVDQA ·chacha20Constants<>+0(SB), Y3 + VPADDD Y3, Y0, Y0 + VPADDD Y3, Y5, Y5 + VPADDD Y3, Y6, Y6 + VPADDD Y7, Y14, Y14 + VPADDD Y7, Y9, Y9 + VPADDD Y7, Y10, Y10 + VPADDD Y11, Y12, Y12 + VPADDD Y11, Y13, Y13 + VPADDD Y11, Y8, Y8 + VMOVDQA ·avx2IncMask<>+0(SB), Y3 + VPADDD Y15, Y4, Y4 + VPADDD Y3, Y15, Y15 + VPADDD Y15, Y1, Y1 + VPADDD Y3, Y15, Y15 + VPADDD Y15, Y2, Y2 + + // Clamp and store poly key + VPERM2I128 $0x02, Y0, Y14, Y3 + VPAND ·polyClampMask<>+0(SB), Y3, Y3 + VMOVDQA Y3, (BP) + + // Stream for up to 320 bytes + VPERM2I128 $0x13, Y0, Y14, Y0 + VPERM2I128 $0x13, Y12, Y4, Y14 + VPERM2I128 $0x02, Y5, Y9, Y12 + VPERM2I128 $0x02, Y13, Y1, Y4 + VPERM2I128 $0x13, Y5, Y9, Y5 + VPERM2I128 $0x13, Y13, Y1, Y9 + VPERM2I128 $0x02, Y6, Y10, Y13 + VPERM2I128 $0x02, Y8, Y2, Y1 + VPERM2I128 $0x13, Y6, Y10, Y6 + VPERM2I128 $0x13, Y8, Y2, Y10 + JMP openAVX2ShortOpen + +openAVX2Tail128: + // Need to decrypt up to 128 bytes - prepare two blocks + VMOVDQA ·chacha20Constants<>+0(SB), Y5 + VMOVDQA 32(BP), Y9 + VMOVDQA 64(BP), Y13 + VMOVDQA 192(BP), Y1 + VPADDD ·avx2IncMask<>+0(SB), Y1, Y1 + VMOVDQA Y1, Y4 + XORQ R9, R9 + MOVQ BX, CX + ANDQ $-16, CX + TESTQ CX, CX + JE openAVX2Tail128LoopB + +openAVX2Tail128LoopA: + ADDQ (SI)(R9*1), R10 + ADCQ 8(SI)(R9*1), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + +openAVX2Tail128LoopB: + ADDQ $0x10, R9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPALIGNR $0x04, Y9, Y9, Y9 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x0c, Y1, Y1, Y1 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPALIGNR $0x0c, Y9, Y9, Y9 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x04, Y1, Y1, Y1 + CMPQ R9, CX + JB openAVX2Tail128LoopA + CMPQ R9, $0xa0 + JNE openAVX2Tail128LoopB + VPADDD ·chacha20Constants<>+0(SB), Y5, Y5 + VPADDD 32(BP), Y9, Y9 + VPADDD 64(BP), Y13, Y13 + VPADDD Y4, Y1, Y1 + VPERM2I128 $0x02, Y5, Y9, Y0 + VPERM2I128 $0x02, Y13, Y1, Y14 + VPERM2I128 $0x13, Y5, Y9, Y12 + VPERM2I128 $0x13, Y13, Y1, Y4 + +openAVX2TailLoop: + CMPQ BX, $0x20 + JB openAVX2Tail + SUBQ $0x20, BX + + // Load for decryption + VPXOR (SI), Y0, Y0 + VMOVDQU Y0, (DI) + LEAQ 32(SI), SI + LEAQ 32(DI), DI + VMOVDQA Y14, Y0 + VMOVDQA Y12, Y14 + VMOVDQA Y4, Y12 + JMP openAVX2TailLoop + +openAVX2Tail: + CMPQ BX, $0x10 + VMOVDQA X0, X1 + JB openAVX2TailDone + SUBQ $0x10, BX + + // Load for decryption + VPXOR (SI), X0, X12 + VMOVDQU X12, (DI) + LEAQ 16(SI), SI + LEAQ 16(DI), DI + VPERM2I128 $0x11, Y0, Y0, Y0 + VMOVDQA X0, X1 + +openAVX2TailDone: + VZEROUPPER + JMP openSSETail16 + +openAVX2Tail256: + VMOVDQA ·chacha20Constants<>+0(SB), Y0 + VMOVDQA Y0, Y5 + VMOVDQA 32(BP), Y14 + VMOVDQA Y14, Y9 + VMOVDQA 64(BP), Y12 + VMOVDQA Y12, Y13 + VMOVDQA 192(BP), Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y1 + VMOVDQA Y4, Y7 + VMOVDQA Y1, Y11 + + // Compute the number of iterations that will hash data + MOVQ BX, 224(BP) + MOVQ BX, CX + SUBQ $0x80, CX + SHRQ $0x04, CX + MOVQ $0x0000000a, R9 + CMPQ CX, $0x0a + CMOVQGT R9, CX + MOVQ SI, BX + XORQ R9, R9 + +openAVX2Tail256LoopA: + ADDQ (BX), R10 + ADCQ 8(BX), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(BX), BX + +openAVX2Tail256LoopB: + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x04, Y9, Y9, Y9 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPALIGNR $0x0c, Y1, Y1, Y1 + INCQ R9 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x0c, Y9, Y9, Y9 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x04, Y4, Y4, Y4 + VPALIGNR $0x04, Y1, Y1, Y1 + CMPQ R9, CX + JB openAVX2Tail256LoopA + CMPQ R9, $0x0a + JNE openAVX2Tail256LoopB + MOVQ BX, R9 + SUBQ SI, BX + MOVQ BX, CX + MOVQ 224(BP), BX + +openAVX2Tail256Hash: + ADDQ $0x10, CX + CMPQ CX, BX + JGT openAVX2Tail256HashEnd + ADDQ (R9), R10 + ADCQ 8(R9), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(R9), R9 + JMP openAVX2Tail256Hash + +openAVX2Tail256HashEnd: + VPADDD ·chacha20Constants<>+0(SB), Y0, Y0 + VPADDD ·chacha20Constants<>+0(SB), Y5, Y5 + VPADDD 32(BP), Y14, Y14 + VPADDD 32(BP), Y9, Y9 + VPADDD 64(BP), Y12, Y12 + VPADDD 64(BP), Y13, Y13 + VPADDD Y7, Y4, Y4 + VPADDD Y11, Y1, Y1 + VPERM2I128 $0x02, Y0, Y14, Y6 + VPERM2I128 $0x02, Y12, Y4, Y10 + VPERM2I128 $0x13, Y0, Y14, Y8 + VPERM2I128 $0x13, Y12, Y4, Y2 + VPERM2I128 $0x02, Y5, Y9, Y0 + VPERM2I128 $0x02, Y13, Y1, Y14 + VPERM2I128 $0x13, Y5, Y9, Y12 + VPERM2I128 $0x13, Y13, Y1, Y4 + VPXOR (SI), Y6, Y6 + VPXOR 32(SI), Y10, Y10 + VPXOR 64(SI), Y8, Y8 + VPXOR 96(SI), Y2, Y2 + VMOVDQU Y6, (DI) + VMOVDQU Y10, 32(DI) + VMOVDQU Y8, 64(DI) + VMOVDQU Y2, 96(DI) + LEAQ 128(SI), SI + LEAQ 128(DI), DI + SUBQ $0x80, BX + JMP openAVX2TailLoop + +openAVX2Tail384: + // Need to decrypt up to 384 bytes - prepare six blocks + VMOVDQA ·chacha20Constants<>+0(SB), Y0 + VMOVDQA Y0, Y5 + VMOVDQA Y0, Y6 + VMOVDQA 32(BP), Y14 + VMOVDQA Y14, Y9 + VMOVDQA Y14, Y10 + VMOVDQA 64(BP), Y12 + VMOVDQA Y12, Y13 + VMOVDQA Y12, Y8 + VMOVDQA 192(BP), Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y1 + VPADDD ·avx2IncMask<>+0(SB), Y1, Y2 + VMOVDQA Y4, 96(BP) + VMOVDQA Y1, 128(BP) + VMOVDQA Y2, 160(BP) + + // Compute the number of iterations that will hash two blocks of data + MOVQ BX, 224(BP) + MOVQ BX, CX + SUBQ $0x00000100, CX + SHRQ $0x04, CX + ADDQ $0x06, CX + MOVQ $0x0000000a, R9 + CMPQ CX, $0x0a + CMOVQGT R9, CX + MOVQ SI, BX + XORQ R9, R9 + +openAVX2Tail384LoopB: + ADDQ (BX), R10 + ADCQ 8(BX), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(BX), BX + +openAVX2Tail384LoopA: + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x0c, Y10, Y3 + VPSRLD $0x14, Y10, Y10 + VPXOR Y3, Y10, Y10 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x07, Y10, Y3 + VPSRLD $0x19, Y10, Y10 + VPXOR Y3, Y10, Y10 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x04, Y9, Y9, Y9 + VPALIGNR $0x04, Y10, Y10, Y10 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPALIGNR $0x0c, Y1, Y1, Y1 + VPALIGNR $0x0c, Y2, Y2, Y2 + ADDQ (BX), R10 + ADCQ 8(BX), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(BX), BX + INCQ R9 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x0c, Y10, Y3 + VPSRLD $0x14, Y10, Y10 + VPXOR Y3, Y10, Y10 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x07, Y10, Y3 + VPSRLD $0x19, Y10, Y10 + VPXOR Y3, Y10, Y10 + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x0c, Y9, Y9, Y9 + VPALIGNR $0x0c, Y10, Y10, Y10 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x04, Y4, Y4, Y4 + VPALIGNR $0x04, Y1, Y1, Y1 + VPALIGNR $0x04, Y2, Y2, Y2 + CMPQ R9, CX + JB openAVX2Tail384LoopB + CMPQ R9, $0x0a + JNE openAVX2Tail384LoopA + MOVQ BX, R9 + SUBQ SI, BX + MOVQ BX, CX + MOVQ 224(BP), BX + +openAVX2Tail384Hash: + ADDQ $0x10, CX + CMPQ CX, BX + JGT openAVX2Tail384HashEnd + ADDQ (R9), R10 + ADCQ 8(R9), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(R9), R9 + JMP openAVX2Tail384Hash + +openAVX2Tail384HashEnd: + VPADDD ·chacha20Constants<>+0(SB), Y0, Y0 + VPADDD ·chacha20Constants<>+0(SB), Y5, Y5 + VPADDD ·chacha20Constants<>+0(SB), Y6, Y6 + VPADDD 32(BP), Y14, Y14 + VPADDD 32(BP), Y9, Y9 + VPADDD 32(BP), Y10, Y10 + VPADDD 64(BP), Y12, Y12 + VPADDD 64(BP), Y13, Y13 + VPADDD 64(BP), Y8, Y8 + VPADDD 96(BP), Y4, Y4 + VPADDD 128(BP), Y1, Y1 + VPADDD 160(BP), Y2, Y2 + VPERM2I128 $0x02, Y0, Y14, Y3 + VPERM2I128 $0x02, Y12, Y4, Y7 + VPERM2I128 $0x13, Y0, Y14, Y11 + VPERM2I128 $0x13, Y12, Y4, Y15 + VPXOR (SI), Y3, Y3 + VPXOR 32(SI), Y7, Y7 + VPXOR 64(SI), Y11, Y11 + VPXOR 96(SI), Y15, Y15 + VMOVDQU Y3, (DI) + VMOVDQU Y7, 32(DI) + VMOVDQU Y11, 64(DI) + VMOVDQU Y15, 96(DI) + VPERM2I128 $0x02, Y5, Y9, Y3 + VPERM2I128 $0x02, Y13, Y1, Y7 + VPERM2I128 $0x13, Y5, Y9, Y11 + VPERM2I128 $0x13, Y13, Y1, Y15 + VPXOR 128(SI), Y3, Y3 + VPXOR 160(SI), Y7, Y7 + VPXOR 192(SI), Y11, Y11 + VPXOR 224(SI), Y15, Y15 + VMOVDQU Y3, 128(DI) + VMOVDQU Y7, 160(DI) + VMOVDQU Y11, 192(DI) + VMOVDQU Y15, 224(DI) + VPERM2I128 $0x02, Y6, Y10, Y0 + VPERM2I128 $0x02, Y8, Y2, Y14 + VPERM2I128 $0x13, Y6, Y10, Y12 + VPERM2I128 $0x13, Y8, Y2, Y4 + LEAQ 256(SI), SI + LEAQ 256(DI), DI + SUBQ $0x00000100, BX + JMP openAVX2TailLoop + +openAVX2Tail512: + VMOVDQU ·chacha20Constants<>+0(SB), Y0 + VMOVDQA Y0, Y5 + VMOVDQA Y0, Y6 + VMOVDQA Y0, Y7 + VMOVDQA 32(BP), Y14 + VMOVDQA Y14, Y9 + VMOVDQA Y14, Y10 + VMOVDQA Y14, Y11 + VMOVDQA 64(BP), Y12 + VMOVDQA Y12, Y13 + VMOVDQA Y12, Y8 + VMOVDQA Y12, Y15 + VMOVDQA 192(BP), Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y1 + VPADDD ·avx2IncMask<>+0(SB), Y1, Y2 + VPADDD ·avx2IncMask<>+0(SB), Y2, Y3 + VMOVDQA Y4, 96(BP) + VMOVDQA Y1, 128(BP) + VMOVDQA Y2, 160(BP) + VMOVDQA Y3, 192(BP) + XORQ CX, CX + MOVQ SI, R9 + +openAVX2Tail512LoopB: + ADDQ (R9), R10 + ADCQ 8(R9), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(R9), R9 + +openAVX2Tail512LoopA: + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y3, Y3 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + VMOVDQA Y15, 224(BP) + VPSLLD $0x0c, Y14, Y15 + VPSRLD $0x14, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x0c, Y9, Y15 + VPSRLD $0x14, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x0c, Y10, Y15 + VPSRLD $0x14, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x0c, Y11, Y15 + VPSRLD $0x14, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + ADDQ (R9), R10 + ADCQ 8(R9), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y3, Y3 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + VMOVDQA Y15, 224(BP) + VPSLLD $0x07, Y14, Y15 + VPSRLD $0x19, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x07, Y9, Y15 + VPSRLD $0x19, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x07, Y10, Y15 + VPSRLD $0x19, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x07, Y11, Y15 + VPSRLD $0x19, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x04, Y9, Y9, Y9 + VPALIGNR $0x04, Y10, Y10, Y10 + VPALIGNR $0x04, Y11, Y11, Y11 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x08, Y15, Y15, Y15 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPALIGNR $0x0c, Y1, Y1, Y1 + VPALIGNR $0x0c, Y2, Y2, Y2 + VPALIGNR $0x0c, Y3, Y3, Y3 + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y3, Y3 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + ADDQ 16(R9), R10 + ADCQ 24(R9), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 32(R9), R9 + VMOVDQA Y15, 224(BP) + VPSLLD $0x0c, Y14, Y15 + VPSRLD $0x14, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x0c, Y9, Y15 + VPSRLD $0x14, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x0c, Y10, Y15 + VPSRLD $0x14, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x0c, Y11, Y15 + VPSRLD $0x14, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y3, Y3 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + VMOVDQA Y15, 224(BP) + VPSLLD $0x07, Y14, Y15 + VPSRLD $0x19, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x07, Y9, Y15 + VPSRLD $0x19, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x07, Y10, Y15 + VPSRLD $0x19, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x07, Y11, Y15 + VPSRLD $0x19, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x0c, Y9, Y9, Y9 + VPALIGNR $0x0c, Y10, Y10, Y10 + VPALIGNR $0x0c, Y11, Y11, Y11 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x08, Y15, Y15, Y15 + VPALIGNR $0x04, Y4, Y4, Y4 + VPALIGNR $0x04, Y1, Y1, Y1 + VPALIGNR $0x04, Y2, Y2, Y2 + VPALIGNR $0x04, Y3, Y3, Y3 + INCQ CX + CMPQ CX, $0x04 + JLT openAVX2Tail512LoopB + CMPQ CX, $0x0a + JNE openAVX2Tail512LoopA + MOVQ BX, CX + SUBQ $0x00000180, CX + ANDQ $-16, CX + +openAVX2Tail512HashLoop: + TESTQ CX, CX + JE openAVX2Tail512HashEnd + ADDQ (R9), R10 + ADCQ 8(R9), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(R9), R9 + SUBQ $0x10, CX + JMP openAVX2Tail512HashLoop + +openAVX2Tail512HashEnd: + VPADDD ·chacha20Constants<>+0(SB), Y0, Y0 + VPADDD ·chacha20Constants<>+0(SB), Y5, Y5 + VPADDD ·chacha20Constants<>+0(SB), Y6, Y6 + VPADDD ·chacha20Constants<>+0(SB), Y7, Y7 + VPADDD 32(BP), Y14, Y14 + VPADDD 32(BP), Y9, Y9 + VPADDD 32(BP), Y10, Y10 + VPADDD 32(BP), Y11, Y11 + VPADDD 64(BP), Y12, Y12 + VPADDD 64(BP), Y13, Y13 + VPADDD 64(BP), Y8, Y8 + VPADDD 64(BP), Y15, Y15 + VPADDD 96(BP), Y4, Y4 + VPADDD 128(BP), Y1, Y1 + VPADDD 160(BP), Y2, Y2 + VPADDD 192(BP), Y3, Y3 + VMOVDQA Y15, 224(BP) + VPERM2I128 $0x02, Y0, Y14, Y15 + VPERM2I128 $0x13, Y0, Y14, Y14 + VPERM2I128 $0x02, Y12, Y4, Y0 + VPERM2I128 $0x13, Y12, Y4, Y12 + VPXOR (SI), Y15, Y15 + VPXOR 32(SI), Y0, Y0 + VPXOR 64(SI), Y14, Y14 + VPXOR 96(SI), Y12, Y12 + VMOVDQU Y15, (DI) + VMOVDQU Y0, 32(DI) + VMOVDQU Y14, 64(DI) + VMOVDQU Y12, 96(DI) + VPERM2I128 $0x02, Y5, Y9, Y0 + VPERM2I128 $0x02, Y13, Y1, Y14 + VPERM2I128 $0x13, Y5, Y9, Y12 + VPERM2I128 $0x13, Y13, Y1, Y4 + VPXOR 128(SI), Y0, Y0 + VPXOR 160(SI), Y14, Y14 + VPXOR 192(SI), Y12, Y12 + VPXOR 224(SI), Y4, Y4 + VMOVDQU Y0, 128(DI) + VMOVDQU Y14, 160(DI) + VMOVDQU Y12, 192(DI) + VMOVDQU Y4, 224(DI) + VPERM2I128 $0x02, Y6, Y10, Y0 + VPERM2I128 $0x02, Y8, Y2, Y14 + VPERM2I128 $0x13, Y6, Y10, Y12 + VPERM2I128 $0x13, Y8, Y2, Y4 + VPXOR 256(SI), Y0, Y0 + VPXOR 288(SI), Y14, Y14 + VPXOR 320(SI), Y12, Y12 + VPXOR 352(SI), Y4, Y4 + VMOVDQU Y0, 256(DI) + VMOVDQU Y14, 288(DI) + VMOVDQU Y12, 320(DI) + VMOVDQU Y4, 352(DI) + VPERM2I128 $0x02, Y7, Y11, Y0 + VPERM2I128 $0x02, 224(BP), Y3, Y14 + VPERM2I128 $0x13, Y7, Y11, Y12 + VPERM2I128 $0x13, 224(BP), Y3, Y4 + LEAQ 384(SI), SI + LEAQ 384(DI), DI + SUBQ $0x00000180, BX + JMP openAVX2TailLoop + +DATA ·chacha20Constants<>+0(SB)/4, $0x61707865 +DATA ·chacha20Constants<>+4(SB)/4, $0x3320646e +DATA ·chacha20Constants<>+8(SB)/4, $0x79622d32 +DATA ·chacha20Constants<>+12(SB)/4, $0x6b206574 +DATA ·chacha20Constants<>+16(SB)/4, $0x61707865 +DATA ·chacha20Constants<>+20(SB)/4, $0x3320646e +DATA ·chacha20Constants<>+24(SB)/4, $0x79622d32 +DATA ·chacha20Constants<>+28(SB)/4, $0x6b206574 +GLOBL ·chacha20Constants<>(SB), RODATA|NOPTR, $32 + +DATA ·polyClampMask<>+0(SB)/8, $0x0ffffffc0fffffff +DATA ·polyClampMask<>+8(SB)/8, $0x0ffffffc0ffffffc +DATA ·polyClampMask<>+16(SB)/8, $0xffffffffffffffff +DATA ·polyClampMask<>+24(SB)/8, $0xffffffffffffffff +GLOBL ·polyClampMask<>(SB), RODATA|NOPTR, $32 + +DATA ·sseIncMask<>+0(SB)/8, $0x0000000000000001 +DATA ·sseIncMask<>+8(SB)/8, $0x0000000000000000 +GLOBL ·sseIncMask<>(SB), RODATA|NOPTR, $16 + +DATA ·andMask<>+0(SB)/8, $0x00000000000000ff +DATA ·andMask<>+8(SB)/8, $0x0000000000000000 +DATA ·andMask<>+16(SB)/8, $0x000000000000ffff +DATA ·andMask<>+24(SB)/8, $0x0000000000000000 +DATA ·andMask<>+32(SB)/8, $0x0000000000ffffff +DATA ·andMask<>+40(SB)/8, $0x0000000000000000 +DATA ·andMask<>+48(SB)/8, $0x00000000ffffffff +DATA ·andMask<>+56(SB)/8, $0x0000000000000000 +DATA ·andMask<>+64(SB)/8, $0x000000ffffffffff +DATA ·andMask<>+72(SB)/8, $0x0000000000000000 +DATA ·andMask<>+80(SB)/8, $0x0000ffffffffffff +DATA ·andMask<>+88(SB)/8, $0x0000000000000000 +DATA ·andMask<>+96(SB)/8, $0x00ffffffffffffff +DATA ·andMask<>+104(SB)/8, $0x0000000000000000 +DATA ·andMask<>+112(SB)/8, $0xffffffffffffffff +DATA ·andMask<>+120(SB)/8, $0x0000000000000000 +DATA ·andMask<>+128(SB)/8, $0xffffffffffffffff +DATA ·andMask<>+136(SB)/8, $0x00000000000000ff +DATA ·andMask<>+144(SB)/8, $0xffffffffffffffff +DATA ·andMask<>+152(SB)/8, $0x000000000000ffff +DATA ·andMask<>+160(SB)/8, $0xffffffffffffffff +DATA ·andMask<>+168(SB)/8, $0x0000000000ffffff +DATA ·andMask<>+176(SB)/8, $0xffffffffffffffff +DATA ·andMask<>+184(SB)/8, $0x00000000ffffffff +DATA ·andMask<>+192(SB)/8, $0xffffffffffffffff +DATA ·andMask<>+200(SB)/8, $0x000000ffffffffff +DATA ·andMask<>+208(SB)/8, $0xffffffffffffffff +DATA ·andMask<>+216(SB)/8, $0x0000ffffffffffff +DATA ·andMask<>+224(SB)/8, $0xffffffffffffffff +DATA ·andMask<>+232(SB)/8, $0x00ffffffffffffff +GLOBL ·andMask<>(SB), RODATA|NOPTR, $240 + +DATA ·avx2InitMask<>+0(SB)/8, $0x0000000000000000 +DATA ·avx2InitMask<>+8(SB)/8, $0x0000000000000000 +DATA ·avx2InitMask<>+16(SB)/8, $0x0000000000000001 +DATA ·avx2InitMask<>+24(SB)/8, $0x0000000000000000 +GLOBL ·avx2InitMask<>(SB), RODATA|NOPTR, $32 + +DATA ·rol16<>+0(SB)/8, $0x0504070601000302 +DATA ·rol16<>+8(SB)/8, $0x0d0c0f0e09080b0a +DATA ·rol16<>+16(SB)/8, $0x0504070601000302 +DATA ·rol16<>+24(SB)/8, $0x0d0c0f0e09080b0a +GLOBL ·rol16<>(SB), RODATA|NOPTR, $32 + +DATA ·rol8<>+0(SB)/8, $0x0605040702010003 +DATA ·rol8<>+8(SB)/8, $0x0e0d0c0f0a09080b +DATA ·rol8<>+16(SB)/8, $0x0605040702010003 +DATA ·rol8<>+24(SB)/8, $0x0e0d0c0f0a09080b +GLOBL ·rol8<>(SB), RODATA|NOPTR, $32 + +DATA ·avx2IncMask<>+0(SB)/8, $0x0000000000000002 +DATA ·avx2IncMask<>+8(SB)/8, $0x0000000000000000 +DATA ·avx2IncMask<>+16(SB)/8, $0x0000000000000002 +DATA ·avx2IncMask<>+24(SB)/8, $0x0000000000000000 +GLOBL ·avx2IncMask<>(SB), RODATA|NOPTR, $32 + +// func chacha20Poly1305Seal(dst []byte, key []uint32, src []byte, ad []byte) +// Requires: AVX, AVX2, BMI2, CMOV, SSE2 +TEXT ·chacha20Poly1305Seal(SB), $288-96 + MOVQ SP, BP + ADDQ $0x20, BP + ANDQ $-32, BP + MOVQ dst_base+0(FP), DI + MOVQ key_base+24(FP), R8 + MOVQ src_base+48(FP), SI + MOVQ src_len+56(FP), BX + MOVQ ad_base+72(FP), CX + CMPB ·useAVX2+0(SB), $0x01 + JE chacha20Poly1305Seal_AVX2 + + // Special optimization, for very short buffers + CMPQ BX, $0x80 + JBE sealSSE128 + + // In the seal case - prepare the poly key + 3 blocks of stream in the first iteration + MOVOU ·chacha20Constants<>+0(SB), X0 + MOVOU 16(R8), X3 + MOVOU 32(R8), X6 + MOVOU 48(R8), X9 + + // Store state on stack for future use + MOVO X3, 32(BP) + MOVO X6, 48(BP) + + // Load state, increment counter blocks + MOVO X0, X1 + MOVO X3, X4 + MOVO X6, X7 + MOVO X9, X10 + PADDL ·sseIncMask<>+0(SB), X10 + MOVO X1, X2 + MOVO X4, X5 + MOVO X7, X8 + MOVO X10, X11 + PADDL ·sseIncMask<>+0(SB), X11 + MOVO X2, X12 + MOVO X5, X13 + MOVO X8, X14 + MOVO X11, X15 + PADDL ·sseIncMask<>+0(SB), X15 + + // Store counters + MOVO X9, 80(BP) + MOVO X10, 96(BP) + MOVO X11, 112(BP) + MOVO X15, 128(BP) + MOVQ $0x0000000a, R9 + +sealSSEIntroLoop: + MOVO X14, 64(BP) + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X3 + PXOR X14, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X3 + PXOR X14, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X4 + PXOR X14, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X4 + PXOR X14, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X5 + PXOR X14, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X5 + PXOR X14, X5 + MOVO 64(BP), X14 + MOVO X7, 64(BP) + PADDD X13, X12 + PXOR X12, X15 + ROL16(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x0c, X7 + PSRLL $0x14, X13 + PXOR X7, X13 + PADDD X13, X12 + PXOR X12, X15 + ROL8(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x07, X7 + PSRLL $0x19, X13 + PXOR X7, X13 + MOVO 64(BP), X7 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x0c + MOVO X14, 64(BP) + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X3 + PXOR X14, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X3 + PXOR X14, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X4 + PXOR X14, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X4 + PXOR X14, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X5 + PXOR X14, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X5 + PXOR X14, X5 + MOVO 64(BP), X14 + MOVO X7, 64(BP) + PADDD X13, X12 + PXOR X12, X15 + ROL16(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x0c, X7 + PSRLL $0x14, X13 + PXOR X7, X13 + PADDD X13, X12 + PXOR X12, X15 + ROL8(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x07, X7 + PSRLL $0x19, X13 + PXOR X7, X13 + MOVO 64(BP), X7 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x04 + DECQ R9 + JNE sealSSEIntroLoop + + // Add in the state + PADDD ·chacha20Constants<>+0(SB), X0 + PADDD ·chacha20Constants<>+0(SB), X1 + PADDD ·chacha20Constants<>+0(SB), X2 + PADDD ·chacha20Constants<>+0(SB), X12 + PADDD 32(BP), X3 + PADDD 32(BP), X4 + PADDD 32(BP), X5 + PADDD 32(BP), X13 + PADDD 48(BP), X7 + PADDD 48(BP), X8 + PADDD 48(BP), X14 + PADDD 96(BP), X10 + PADDD 112(BP), X11 + PADDD 128(BP), X15 + + // Clamp and store the key + PAND ·polyClampMask<>+0(SB), X0 + MOVO X0, (BP) + MOVO X3, 16(BP) + + // Hash AAD + MOVQ ad_len+80(FP), R9 + CALL polyHashADInternal<>(SB) + MOVOU (SI), X0 + MOVOU 16(SI), X3 + MOVOU 32(SI), X6 + MOVOU 48(SI), X9 + PXOR X0, X1 + PXOR X3, X4 + PXOR X6, X7 + PXOR X9, X10 + MOVOU X1, (DI) + MOVOU X4, 16(DI) + MOVOU X7, 32(DI) + MOVOU X10, 48(DI) + MOVOU 64(SI), X0 + MOVOU 80(SI), X3 + MOVOU 96(SI), X6 + MOVOU 112(SI), X9 + PXOR X0, X2 + PXOR X3, X5 + PXOR X6, X8 + PXOR X9, X11 + MOVOU X2, 64(DI) + MOVOU X5, 80(DI) + MOVOU X8, 96(DI) + MOVOU X11, 112(DI) + MOVQ $0x00000080, CX + SUBQ $0x80, BX + LEAQ 128(SI), SI + MOVO X12, X1 + MOVO X13, X4 + MOVO X14, X7 + MOVO X15, X10 + CMPQ BX, $0x40 + JBE sealSSE128SealHash + MOVOU (SI), X0 + MOVOU 16(SI), X3 + MOVOU 32(SI), X6 + MOVOU 48(SI), X9 + PXOR X0, X12 + PXOR X3, X13 + PXOR X6, X14 + PXOR X9, X15 + MOVOU X12, 128(DI) + MOVOU X13, 144(DI) + MOVOU X14, 160(DI) + MOVOU X15, 176(DI) + ADDQ $0x40, CX + SUBQ $0x40, BX + LEAQ 64(SI), SI + MOVQ $0x00000002, CX + MOVQ $0x00000008, R9 + CMPQ BX, $0x40 + JBE sealSSETail64 + CMPQ BX, $0x80 + JBE sealSSETail128 + CMPQ BX, $0xc0 + JBE sealSSETail192 + +sealSSEMainLoop: + // Load state, increment counter blocks + MOVO ·chacha20Constants<>+0(SB), X0 + MOVO 32(BP), X3 + MOVO 48(BP), X6 + MOVO 128(BP), X9 + PADDL ·sseIncMask<>+0(SB), X9 + MOVO X0, X1 + MOVO X3, X4 + MOVO X6, X7 + MOVO X9, X10 + PADDL ·sseIncMask<>+0(SB), X10 + MOVO X1, X2 + MOVO X4, X5 + MOVO X7, X8 + MOVO X10, X11 + PADDL ·sseIncMask<>+0(SB), X11 + MOVO X2, X12 + MOVO X5, X13 + MOVO X8, X14 + MOVO X11, X15 + PADDL ·sseIncMask<>+0(SB), X15 + + // Store counters + MOVO X9, 80(BP) + MOVO X10, 96(BP) + MOVO X11, 112(BP) + MOVO X15, 128(BP) + +sealSSEInnerLoop: + MOVO X14, 64(BP) + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X3 + PXOR X14, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X3 + PXOR X14, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X4 + PXOR X14, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X4 + PXOR X14, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X5 + PXOR X14, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X5 + PXOR X14, X5 + MOVO 64(BP), X14 + MOVO X7, 64(BP) + PADDD X13, X12 + PXOR X12, X15 + ROL16(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x0c, X7 + PSRLL $0x14, X13 + PXOR X7, X13 + PADDD X13, X12 + PXOR X12, X15 + ROL8(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x07, X7 + PSRLL $0x19, X13 + PXOR X7, X13 + MOVO 64(BP), X7 + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x0c + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + LEAQ 16(DI), DI + MOVO X14, 64(BP) + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X3 + PXOR X14, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X14) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X3 + PXOR X14, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X4 + PXOR X14, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X14) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X4 + PXOR X14, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x0c, X14 + PSRLL $0x14, X5 + PXOR X14, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X14) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X14 + PSLLL $0x07, X14 + PSRLL $0x19, X5 + PXOR X14, X5 + MOVO 64(BP), X14 + MOVO X7, 64(BP) + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + PADDD X13, X12 + PXOR X12, X15 + ROL16(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x0c, X7 + PSRLL $0x14, X13 + PXOR X7, X13 + PADDD X13, X12 + PXOR X12, X15 + ROL8(X15, X7) + PADDD X15, X14 + PXOR X14, X13 + MOVO X13, X7 + PSLLL $0x07, X7 + PSRLL $0x19, X13 + PXOR X7, X13 + MOVO 64(BP), X7 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x04 + DECQ R9 + JGE sealSSEInnerLoop + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(DI), DI + DECQ CX + JG sealSSEInnerLoop + + // Add in the state + PADDD ·chacha20Constants<>+0(SB), X0 + PADDD ·chacha20Constants<>+0(SB), X1 + PADDD ·chacha20Constants<>+0(SB), X2 + PADDD ·chacha20Constants<>+0(SB), X12 + PADDD 32(BP), X3 + PADDD 32(BP), X4 + PADDD 32(BP), X5 + PADDD 32(BP), X13 + PADDD 48(BP), X6 + PADDD 48(BP), X7 + PADDD 48(BP), X8 + PADDD 48(BP), X14 + PADDD 80(BP), X9 + PADDD 96(BP), X10 + PADDD 112(BP), X11 + PADDD 128(BP), X15 + MOVO X15, 64(BP) + + // Load - xor - store + MOVOU (SI), X15 + PXOR X15, X0 + MOVOU 16(SI), X15 + PXOR X15, X3 + MOVOU 32(SI), X15 + PXOR X15, X6 + MOVOU 48(SI), X15 + PXOR X15, X9 + MOVOU X0, (DI) + MOVOU X3, 16(DI) + MOVOU X6, 32(DI) + MOVOU X9, 48(DI) + MOVO 64(BP), X15 + MOVOU 64(SI), X0 + MOVOU 80(SI), X3 + MOVOU 96(SI), X6 + MOVOU 112(SI), X9 + PXOR X0, X1 + PXOR X3, X4 + PXOR X6, X7 + PXOR X9, X10 + MOVOU X1, 64(DI) + MOVOU X4, 80(DI) + MOVOU X7, 96(DI) + MOVOU X10, 112(DI) + MOVOU 128(SI), X0 + MOVOU 144(SI), X3 + MOVOU 160(SI), X6 + MOVOU 176(SI), X9 + PXOR X0, X2 + PXOR X3, X5 + PXOR X6, X8 + PXOR X9, X11 + MOVOU X2, 128(DI) + MOVOU X5, 144(DI) + MOVOU X8, 160(DI) + MOVOU X11, 176(DI) + ADDQ $0xc0, SI + MOVQ $0x000000c0, CX + SUBQ $0xc0, BX + MOVO X12, X1 + MOVO X13, X4 + MOVO X14, X7 + MOVO X15, X10 + CMPQ BX, $0x40 + JBE sealSSE128SealHash + MOVOU (SI), X0 + MOVOU 16(SI), X3 + MOVOU 32(SI), X6 + MOVOU 48(SI), X9 + PXOR X0, X12 + PXOR X3, X13 + PXOR X6, X14 + PXOR X9, X15 + MOVOU X12, 192(DI) + MOVOU X13, 208(DI) + MOVOU X14, 224(DI) + MOVOU X15, 240(DI) + LEAQ 64(SI), SI + SUBQ $0x40, BX + MOVQ $0x00000006, CX + MOVQ $0x00000004, R9 + CMPQ BX, $0xc0 + JG sealSSEMainLoop + MOVQ BX, CX + TESTQ BX, BX + JE sealSSE128SealHash + MOVQ $0x00000006, CX + CMPQ BX, $0x40 + JBE sealSSETail64 + CMPQ BX, $0x80 + JBE sealSSETail128 + JMP sealSSETail192 + +sealSSETail64: + MOVO ·chacha20Constants<>+0(SB), X1 + MOVO 32(BP), X4 + MOVO 48(BP), X7 + MOVO 128(BP), X10 + PADDL ·sseIncMask<>+0(SB), X10 + MOVO X10, 80(BP) + +sealSSETail64LoopA: + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(DI), DI + +sealSSETail64LoopB: + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X13) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X13 + PSLLL $0x0c, X13 + PSRLL $0x14, X4 + PXOR X13, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X13) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X13 + PSLLL $0x07, X13 + PSRLL $0x19, X4 + PXOR X13, X4 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x0c + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X13) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X13 + PSLLL $0x0c, X13 + PSRLL $0x14, X4 + PXOR X13, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X13) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X13 + PSLLL $0x07, X13 + PSRLL $0x19, X4 + PXOR X13, X4 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x04 + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(DI), DI + DECQ CX + JG sealSSETail64LoopA + DECQ R9 + JGE sealSSETail64LoopB + PADDL ·chacha20Constants<>+0(SB), X1 + PADDL 32(BP), X4 + PADDL 48(BP), X7 + PADDL 80(BP), X10 + JMP sealSSE128Seal + +sealSSETail128: + MOVO ·chacha20Constants<>+0(SB), X0 + MOVO 32(BP), X3 + MOVO 48(BP), X6 + MOVO 128(BP), X9 + PADDL ·sseIncMask<>+0(SB), X9 + MOVO X9, 80(BP) + MOVO X0, X1 + MOVO X3, X4 + MOVO X6, X7 + MOVO X9, X10 + PADDL ·sseIncMask<>+0(SB), X10 + MOVO X10, 96(BP) + +sealSSETail128LoopA: + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(DI), DI + +sealSSETail128LoopB: + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X4 + PXOR X12, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X4 + PXOR X12, X4 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x0c + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(DI), DI + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X4 + PXOR X12, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X4 + PXOR X12, X4 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x04 + DECQ CX + JG sealSSETail128LoopA + DECQ R9 + JGE sealSSETail128LoopB + PADDL ·chacha20Constants<>+0(SB), X0 + PADDL ·chacha20Constants<>+0(SB), X1 + PADDL 32(BP), X3 + PADDL 32(BP), X4 + PADDL 48(BP), X6 + PADDL 48(BP), X7 + PADDL 80(BP), X9 + PADDL 96(BP), X10 + MOVOU (SI), X12 + MOVOU 16(SI), X13 + MOVOU 32(SI), X14 + MOVOU 48(SI), X15 + PXOR X12, X0 + PXOR X13, X3 + PXOR X14, X6 + PXOR X15, X9 + MOVOU X0, (DI) + MOVOU X3, 16(DI) + MOVOU X6, 32(DI) + MOVOU X9, 48(DI) + MOVQ $0x00000040, CX + LEAQ 64(SI), SI + SUBQ $0x40, BX + JMP sealSSE128SealHash + +sealSSETail192: + MOVO ·chacha20Constants<>+0(SB), X0 + MOVO 32(BP), X3 + MOVO 48(BP), X6 + MOVO 128(BP), X9 + PADDL ·sseIncMask<>+0(SB), X9 + MOVO X9, 80(BP) + MOVO X0, X1 + MOVO X3, X4 + MOVO X6, X7 + MOVO X9, X10 + PADDL ·sseIncMask<>+0(SB), X10 + MOVO X10, 96(BP) + MOVO X1, X2 + MOVO X4, X5 + MOVO X7, X8 + MOVO X10, X11 + PADDL ·sseIncMask<>+0(SB), X11 + MOVO X11, 112(BP) + +sealSSETail192LoopA: + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(DI), DI + +sealSSETail192LoopB: + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X4 + PXOR X12, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X4 + PXOR X12, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X5 + PXOR X12, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X5 + PXOR X12, X5 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(DI), DI + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X4 + PXOR X12, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X4 + PXOR X12, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X5 + PXOR X12, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X5 + PXOR X12, X5 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + DECQ CX + JG sealSSETail192LoopA + DECQ R9 + JGE sealSSETail192LoopB + PADDL ·chacha20Constants<>+0(SB), X0 + PADDL ·chacha20Constants<>+0(SB), X1 + PADDL ·chacha20Constants<>+0(SB), X2 + PADDL 32(BP), X3 + PADDL 32(BP), X4 + PADDL 32(BP), X5 + PADDL 48(BP), X6 + PADDL 48(BP), X7 + PADDL 48(BP), X8 + PADDL 80(BP), X9 + PADDL 96(BP), X10 + PADDL 112(BP), X11 + MOVOU (SI), X12 + MOVOU 16(SI), X13 + MOVOU 32(SI), X14 + MOVOU 48(SI), X15 + PXOR X12, X0 + PXOR X13, X3 + PXOR X14, X6 + PXOR X15, X9 + MOVOU X0, (DI) + MOVOU X3, 16(DI) + MOVOU X6, 32(DI) + MOVOU X9, 48(DI) + MOVOU 64(SI), X12 + MOVOU 80(SI), X13 + MOVOU 96(SI), X14 + MOVOU 112(SI), X15 + PXOR X12, X1 + PXOR X13, X4 + PXOR X14, X7 + PXOR X15, X10 + MOVOU X1, 64(DI) + MOVOU X4, 80(DI) + MOVOU X7, 96(DI) + MOVOU X10, 112(DI) + MOVO X2, X1 + MOVO X5, X4 + MOVO X8, X7 + MOVO X11, X10 + MOVQ $0x00000080, CX + LEAQ 128(SI), SI + SUBQ $0x80, BX + JMP sealSSE128SealHash + +sealSSE128: + MOVOU ·chacha20Constants<>+0(SB), X0 + MOVOU 16(R8), X3 + MOVOU 32(R8), X6 + MOVOU 48(R8), X9 + MOVO X0, X1 + MOVO X3, X4 + MOVO X6, X7 + MOVO X9, X10 + PADDL ·sseIncMask<>+0(SB), X10 + MOVO X1, X2 + MOVO X4, X5 + MOVO X7, X8 + MOVO X10, X11 + PADDL ·sseIncMask<>+0(SB), X11 + MOVO X3, X13 + MOVO X6, X14 + MOVO X10, X15 + MOVQ $0x0000000a, R9 + +sealSSE128InnerCipherLoop: + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X4 + PXOR X12, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X4 + PXOR X12, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X5 + PXOR X12, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X5 + PXOR X12, X5 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x04 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x0c + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + PADDD X3, X0 + PXOR X0, X9 + ROL16(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X3 + PXOR X12, X3 + PADDD X3, X0 + PXOR X0, X9 + ROL8(X9, X12) + PADDD X9, X6 + PXOR X6, X3 + MOVO X3, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X3 + PXOR X12, X3 + PADDD X4, X1 + PXOR X1, X10 + ROL16(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X4 + PXOR X12, X4 + PADDD X4, X1 + PXOR X1, X10 + ROL8(X10, X12) + PADDD X10, X7 + PXOR X7, X4 + MOVO X4, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X4 + PXOR X12, X4 + PADDD X5, X2 + PXOR X2, X11 + ROL16(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x0c, X12 + PSRLL $0x14, X5 + PXOR X12, X5 + PADDD X5, X2 + PXOR X2, X11 + ROL8(X11, X12) + PADDD X11, X8 + PXOR X8, X5 + MOVO X5, X12 + PSLLL $0x07, X12 + PSRLL $0x19, X5 + PXOR X12, X5 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xe4 + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xed + BYTE $0x0c + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xf6 + BYTE $0x08 + BYTE $0x66 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xff + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc0 + BYTE $0x08 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xc9 + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xd2 + BYTE $0x04 + BYTE $0x66 + BYTE $0x45 + BYTE $0x0f + BYTE $0x3a + BYTE $0x0f + BYTE $0xdb + BYTE $0x04 + DECQ R9 + JNE sealSSE128InnerCipherLoop + + // A0|B0 hold the Poly1305 32-byte key, C0,D0 can be discarded + PADDL ·chacha20Constants<>+0(SB), X0 + PADDL ·chacha20Constants<>+0(SB), X1 + PADDL ·chacha20Constants<>+0(SB), X2 + PADDL X13, X3 + PADDL X13, X4 + PADDL X13, X5 + PADDL X14, X7 + PADDL X14, X8 + PADDL X15, X10 + PADDL ·sseIncMask<>+0(SB), X15 + PADDL X15, X11 + PAND ·polyClampMask<>+0(SB), X0 + MOVOU X0, (BP) + MOVOU X3, 16(BP) + + // Hash + MOVQ ad_len+80(FP), R9 + CALL polyHashADInternal<>(SB) + XORQ CX, CX + +sealSSE128SealHash: + CMPQ CX, $0x10 + JB sealSSE128Seal + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + SUBQ $0x10, CX + ADDQ $0x10, DI + JMP sealSSE128SealHash + +sealSSE128Seal: + CMPQ BX, $0x10 + JB sealSSETail + SUBQ $0x10, BX + + // Load for decryption + MOVOU (SI), X12 + PXOR X12, X1 + MOVOU X1, (DI) + LEAQ 16(SI), SI + LEAQ 16(DI), DI + + // Extract for hashing + MOVQ X1, R13 + PSRLDQ $0x08, X1 + MOVQ X1, R14 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + + // Shift the stream "left" + MOVO X4, X1 + MOVO X7, X4 + MOVO X10, X7 + MOVO X2, X10 + MOVO X5, X2 + MOVO X8, X5 + MOVO X11, X8 + JMP sealSSE128Seal + +sealSSETail: + TESTQ BX, BX + JE sealSSEFinalize + + // We can only load the PT one byte at a time to avoid read after end of buffer + MOVQ BX, R9 + SHLQ $0x04, R9 + LEAQ ·andMask<>+0(SB), R13 + MOVQ BX, CX + LEAQ -1(SI)(BX*1), SI + XORQ R15, R15 + XORQ R8, R8 + XORQ AX, AX + +sealSSETailLoadLoop: + SHLQ $0x08, R15, R8 + SHLQ $0x08, R15 + MOVB (SI), AX + XORQ AX, R15 + LEAQ -1(SI), SI + DECQ CX + JNE sealSSETailLoadLoop + MOVQ R15, 64(BP) + MOVQ R8, 72(BP) + PXOR 64(BP), X1 + MOVOU X1, (DI) + MOVOU -16(R13)(R9*1), X12 + PAND X12, X1 + MOVQ X1, R13 + PSRLDQ $0x08, X1 + MOVQ X1, R14 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + ADDQ BX, DI + +sealSSEFinalize: + // Hash in the buffer lengths + ADDQ ad_len+80(FP), R10 + ADCQ src_len+56(FP), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + + // Final reduce + MOVQ R10, R13 + MOVQ R11, R14 + MOVQ R12, R15 + SUBQ $-5, R10 + SBBQ $-1, R11 + SBBQ $0x03, R12 + CMOVQCS R13, R10 + CMOVQCS R14, R11 + CMOVQCS R15, R12 + + // Add in the "s" part of the key + ADDQ 16(BP), R10 + ADCQ 24(BP), R11 + + // Finally store the tag at the end of the message + MOVQ R10, (DI) + MOVQ R11, 8(DI) + RET + +chacha20Poly1305Seal_AVX2: + VZEROUPPER + VMOVDQU ·chacha20Constants<>+0(SB), Y0 + BYTE $0xc4 + BYTE $0x42 + BYTE $0x7d + BYTE $0x5a + BYTE $0x70 + BYTE $0x10 + BYTE $0xc4 + BYTE $0x42 + BYTE $0x7d + BYTE $0x5a + BYTE $0x60 + BYTE $0x20 + BYTE $0xc4 + BYTE $0xc2 + BYTE $0x7d + BYTE $0x5a + BYTE $0x60 + BYTE $0x30 + VPADDD ·avx2InitMask<>+0(SB), Y4, Y4 + + // Special optimizations, for very short buffers + CMPQ BX, $0x000000c0 + JBE seal192AVX2 + CMPQ BX, $0x00000140 + JBE seal320AVX2 + + // For the general key prepare the key first - as a byproduct we have 64 bytes of cipher stream + VMOVDQA Y0, Y5 + VMOVDQA Y0, Y6 + VMOVDQA Y0, Y7 + VMOVDQA Y14, Y9 + VMOVDQA Y14, Y10 + VMOVDQA Y14, Y11 + VMOVDQA Y14, 32(BP) + VMOVDQA Y12, Y13 + VMOVDQA Y12, Y8 + VMOVDQA Y12, Y15 + VMOVDQA Y12, 64(BP) + VPADDD ·avx2IncMask<>+0(SB), Y4, Y1 + VMOVDQA Y4, 96(BP) + VPADDD ·avx2IncMask<>+0(SB), Y1, Y2 + VMOVDQA Y1, 128(BP) + VPADDD ·avx2IncMask<>+0(SB), Y2, Y3 + VMOVDQA Y2, 160(BP) + VMOVDQA Y3, 192(BP) + MOVQ $0x0000000a, R9 + +sealAVX2IntroLoop: + VMOVDQA Y15, 224(BP) + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y15 + VPSRLD $0x14, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y15 + VPSRLD $0x19, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y15 + VPSRLD $0x14, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y15 + VPSRLD $0x19, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x0c, Y10, Y15 + VPSRLD $0x14, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x07, Y10, Y15 + VPSRLD $0x19, Y10, Y10 + VPXOR Y15, Y10, Y10 + VMOVDQA 224(BP), Y15 + VMOVDQA Y13, 224(BP) + VPADDD Y11, Y7, Y7 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol16<>+0(SB), Y3, Y3 + VPADDD Y3, Y15, Y15 + VPXOR Y15, Y11, Y11 + VPSLLD $0x0c, Y11, Y13 + VPSRLD $0x14, Y11, Y11 + VPXOR Y13, Y11, Y11 + VPADDD Y11, Y7, Y7 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol8<>+0(SB), Y3, Y3 + VPADDD Y3, Y15, Y15 + VPXOR Y15, Y11, Y11 + VPSLLD $0x07, Y11, Y13 + VPSRLD $0x19, Y11, Y11 + VPXOR Y13, Y11, Y11 + VMOVDQA 224(BP), Y13 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPALIGNR $0x04, Y9, Y9, Y9 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x0c, Y1, Y1, Y1 + VPALIGNR $0x04, Y10, Y10, Y10 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x0c, Y2, Y2, Y2 + VPALIGNR $0x04, Y11, Y11, Y11 + VPALIGNR $0x08, Y15, Y15, Y15 + VPALIGNR $0x0c, Y3, Y3, Y3 + VMOVDQA Y15, 224(BP) + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y15 + VPSRLD $0x14, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y15 + VPSRLD $0x19, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y15 + VPSRLD $0x14, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y15 + VPSRLD $0x19, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x0c, Y10, Y15 + VPSRLD $0x14, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x07, Y10, Y15 + VPSRLD $0x19, Y10, Y10 + VPXOR Y15, Y10, Y10 + VMOVDQA 224(BP), Y15 + VMOVDQA Y13, 224(BP) + VPADDD Y11, Y7, Y7 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol16<>+0(SB), Y3, Y3 + VPADDD Y3, Y15, Y15 + VPXOR Y15, Y11, Y11 + VPSLLD $0x0c, Y11, Y13 + VPSRLD $0x14, Y11, Y11 + VPXOR Y13, Y11, Y11 + VPADDD Y11, Y7, Y7 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol8<>+0(SB), Y3, Y3 + VPADDD Y3, Y15, Y15 + VPXOR Y15, Y11, Y11 + VPSLLD $0x07, Y11, Y13 + VPSRLD $0x19, Y11, Y11 + VPXOR Y13, Y11, Y11 + VMOVDQA 224(BP), Y13 + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x04, Y4, Y4, Y4 + VPALIGNR $0x0c, Y9, Y9, Y9 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x04, Y1, Y1, Y1 + VPALIGNR $0x0c, Y10, Y10, Y10 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x04, Y2, Y2, Y2 + VPALIGNR $0x0c, Y11, Y11, Y11 + VPALIGNR $0x08, Y15, Y15, Y15 + VPALIGNR $0x04, Y3, Y3, Y3 + DECQ R9 + JNE sealAVX2IntroLoop + VPADDD ·chacha20Constants<>+0(SB), Y0, Y0 + VPADDD ·chacha20Constants<>+0(SB), Y5, Y5 + VPADDD ·chacha20Constants<>+0(SB), Y6, Y6 + VPADDD ·chacha20Constants<>+0(SB), Y7, Y7 + VPADDD 32(BP), Y14, Y14 + VPADDD 32(BP), Y9, Y9 + VPADDD 32(BP), Y10, Y10 + VPADDD 32(BP), Y11, Y11 + VPADDD 64(BP), Y12, Y12 + VPADDD 64(BP), Y13, Y13 + VPADDD 64(BP), Y8, Y8 + VPADDD 64(BP), Y15, Y15 + VPADDD 96(BP), Y4, Y4 + VPADDD 128(BP), Y1, Y1 + VPADDD 160(BP), Y2, Y2 + VPADDD 192(BP), Y3, Y3 + VPERM2I128 $0x13, Y12, Y4, Y12 + VPERM2I128 $0x02, Y0, Y14, Y4 + VPERM2I128 $0x13, Y0, Y14, Y0 + + // Clamp and store poly key + VPAND ·polyClampMask<>+0(SB), Y4, Y4 + VMOVDQA Y4, (BP) + + // Hash AD + MOVQ ad_len+80(FP), R9 + CALL polyHashADInternal<>(SB) + + // Can store at least 320 bytes + VPXOR (SI), Y0, Y0 + VPXOR 32(SI), Y12, Y12 + VMOVDQU Y0, (DI) + VMOVDQU Y12, 32(DI) + VPERM2I128 $0x02, Y5, Y9, Y0 + VPERM2I128 $0x02, Y13, Y1, Y14 + VPERM2I128 $0x13, Y5, Y9, Y12 + VPERM2I128 $0x13, Y13, Y1, Y4 + VPXOR 64(SI), Y0, Y0 + VPXOR 96(SI), Y14, Y14 + VPXOR 128(SI), Y12, Y12 + VPXOR 160(SI), Y4, Y4 + VMOVDQU Y0, 64(DI) + VMOVDQU Y14, 96(DI) + VMOVDQU Y12, 128(DI) + VMOVDQU Y4, 160(DI) + VPERM2I128 $0x02, Y6, Y10, Y0 + VPERM2I128 $0x02, Y8, Y2, Y14 + VPERM2I128 $0x13, Y6, Y10, Y12 + VPERM2I128 $0x13, Y8, Y2, Y4 + VPXOR 192(SI), Y0, Y0 + VPXOR 224(SI), Y14, Y14 + VPXOR 256(SI), Y12, Y12 + VPXOR 288(SI), Y4, Y4 + VMOVDQU Y0, 192(DI) + VMOVDQU Y14, 224(DI) + VMOVDQU Y12, 256(DI) + VMOVDQU Y4, 288(DI) + MOVQ $0x00000140, CX + SUBQ $0x00000140, BX + LEAQ 320(SI), SI + VPERM2I128 $0x02, Y7, Y11, Y0 + VPERM2I128 $0x02, Y15, Y3, Y14 + VPERM2I128 $0x13, Y7, Y11, Y12 + VPERM2I128 $0x13, Y15, Y3, Y4 + CMPQ BX, $0x80 + JBE sealAVX2SealHash + VPXOR (SI), Y0, Y0 + VPXOR 32(SI), Y14, Y14 + VPXOR 64(SI), Y12, Y12 + VPXOR 96(SI), Y4, Y4 + VMOVDQU Y0, 320(DI) + VMOVDQU Y14, 352(DI) + VMOVDQU Y12, 384(DI) + VMOVDQU Y4, 416(DI) + SUBQ $0x80, BX + LEAQ 128(SI), SI + MOVQ $0x00000008, CX + MOVQ $0x00000002, R9 + CMPQ BX, $0x80 + JBE sealAVX2Tail128 + CMPQ BX, $0x00000100 + JBE sealAVX2Tail256 + CMPQ BX, $0x00000180 + JBE sealAVX2Tail384 + CMPQ BX, $0x00000200 + JBE sealAVX2Tail512 + + // We have 448 bytes to hash, but main loop hashes 512 bytes at a time - perform some rounds, before the main loop + VMOVDQA ·chacha20Constants<>+0(SB), Y0 + VMOVDQA Y0, Y5 + VMOVDQA Y0, Y6 + VMOVDQA Y0, Y7 + VMOVDQA 32(BP), Y14 + VMOVDQA Y14, Y9 + VMOVDQA Y14, Y10 + VMOVDQA Y14, Y11 + VMOVDQA 64(BP), Y12 + VMOVDQA Y12, Y13 + VMOVDQA Y12, Y8 + VMOVDQA Y12, Y15 + VMOVDQA 192(BP), Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y1 + VPADDD ·avx2IncMask<>+0(SB), Y1, Y2 + VPADDD ·avx2IncMask<>+0(SB), Y2, Y3 + VMOVDQA Y4, 96(BP) + VMOVDQA Y1, 128(BP) + VMOVDQA Y2, 160(BP) + VMOVDQA Y3, 192(BP) + VMOVDQA Y15, 224(BP) + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y15 + VPSRLD $0x14, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y15 + VPSRLD $0x19, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y15 + VPSRLD $0x14, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y15 + VPSRLD $0x19, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x0c, Y10, Y15 + VPSRLD $0x14, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x07, Y10, Y15 + VPSRLD $0x19, Y10, Y10 + VPXOR Y15, Y10, Y10 + VMOVDQA 224(BP), Y15 + VMOVDQA Y13, 224(BP) + VPADDD Y11, Y7, Y7 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol16<>+0(SB), Y3, Y3 + VPADDD Y3, Y15, Y15 + VPXOR Y15, Y11, Y11 + VPSLLD $0x0c, Y11, Y13 + VPSRLD $0x14, Y11, Y11 + VPXOR Y13, Y11, Y11 + VPADDD Y11, Y7, Y7 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol8<>+0(SB), Y3, Y3 + VPADDD Y3, Y15, Y15 + VPXOR Y15, Y11, Y11 + VPSLLD $0x07, Y11, Y13 + VPSRLD $0x19, Y11, Y11 + VPXOR Y13, Y11, Y11 + VMOVDQA 224(BP), Y13 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPALIGNR $0x04, Y9, Y9, Y9 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x0c, Y1, Y1, Y1 + VPALIGNR $0x04, Y10, Y10, Y10 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x0c, Y2, Y2, Y2 + VPALIGNR $0x04, Y11, Y11, Y11 + VPALIGNR $0x08, Y15, Y15, Y15 + VPALIGNR $0x0c, Y3, Y3, Y3 + VMOVDQA Y15, 224(BP) + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y15 + VPSRLD $0x14, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y15 + VPSRLD $0x19, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y15 + VPSRLD $0x14, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y15 + VPSRLD $0x19, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x0c, Y10, Y15 + VPSRLD $0x14, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x07, Y10, Y15 + VPSRLD $0x19, Y10, Y10 + VPXOR Y15, Y10, Y10 + VMOVDQA 224(BP), Y15 + VMOVDQA Y13, 224(BP) + VPADDD Y11, Y7, Y7 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol16<>+0(SB), Y3, Y3 + VPADDD Y3, Y15, Y15 + VPXOR Y15, Y11, Y11 + VPSLLD $0x0c, Y11, Y13 + VPSRLD $0x14, Y11, Y11 + VPXOR Y13, Y11, Y11 + VPADDD Y11, Y7, Y7 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol8<>+0(SB), Y3, Y3 + VPADDD Y3, Y15, Y15 + VPXOR Y15, Y11, Y11 + VPSLLD $0x07, Y11, Y13 + VPSRLD $0x19, Y11, Y11 + VPXOR Y13, Y11, Y11 + VMOVDQA 224(BP), Y13 + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x04, Y4, Y4, Y4 + VPALIGNR $0x0c, Y9, Y9, Y9 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x04, Y1, Y1, Y1 + VPALIGNR $0x0c, Y10, Y10, Y10 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x04, Y2, Y2, Y2 + VPALIGNR $0x0c, Y11, Y11, Y11 + VPALIGNR $0x08, Y15, Y15, Y15 + VPALIGNR $0x04, Y3, Y3, Y3 + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y3, Y3 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + VMOVDQA Y15, 224(BP) + VPSLLD $0x0c, Y14, Y15 + VPSRLD $0x14, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x0c, Y9, Y15 + VPSRLD $0x14, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x0c, Y10, Y15 + VPSRLD $0x14, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x0c, Y11, Y15 + VPSRLD $0x14, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + SUBQ $0x10, DI + MOVQ $0x00000009, CX + JMP sealAVX2InternalLoopStart + +sealAVX2MainLoop: + VMOVDQU ·chacha20Constants<>+0(SB), Y0 + VMOVDQA Y0, Y5 + VMOVDQA Y0, Y6 + VMOVDQA Y0, Y7 + VMOVDQA 32(BP), Y14 + VMOVDQA Y14, Y9 + VMOVDQA Y14, Y10 + VMOVDQA Y14, Y11 + VMOVDQA 64(BP), Y12 + VMOVDQA Y12, Y13 + VMOVDQA Y12, Y8 + VMOVDQA Y12, Y15 + VMOVDQA 192(BP), Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y1 + VPADDD ·avx2IncMask<>+0(SB), Y1, Y2 + VPADDD ·avx2IncMask<>+0(SB), Y2, Y3 + VMOVDQA Y4, 96(BP) + VMOVDQA Y1, 128(BP) + VMOVDQA Y2, 160(BP) + VMOVDQA Y3, 192(BP) + MOVQ $0x0000000a, CX + +sealAVX2InternalLoop: + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y3, Y3 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + VMOVDQA Y15, 224(BP) + VPSLLD $0x0c, Y14, Y15 + VPSRLD $0x14, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x0c, Y9, Y15 + VPSRLD $0x14, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x0c, Y10, Y15 + VPSRLD $0x14, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x0c, Y11, Y15 + VPSRLD $0x14, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + +sealAVX2InternalLoopStart: + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y3, Y3 + ADDQ 16(DI), R10 + ADCQ 24(DI), R11 + ADCQ $0x01, R12 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + VMOVDQA Y15, 224(BP) + VPSLLD $0x07, Y14, Y15 + VPSRLD $0x19, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x07, Y9, Y15 + VPSRLD $0x19, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x07, Y10, Y15 + VPSRLD $0x19, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x07, Y11, Y15 + VPSRLD $0x19, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x04, Y9, Y9, Y9 + VPALIGNR $0x04, Y10, Y10, Y10 + VPALIGNR $0x04, Y11, Y11, Y11 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x08, Y15, Y15, Y15 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPALIGNR $0x0c, Y1, Y1, Y1 + VPALIGNR $0x0c, Y2, Y2, Y2 + VPALIGNR $0x0c, Y3, Y3, Y3 + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y3, Y3 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + ADDQ 32(DI), R10 + ADCQ 40(DI), R11 + ADCQ $0x01, R12 + LEAQ 48(DI), DI + VMOVDQA Y15, 224(BP) + VPSLLD $0x0c, Y14, Y15 + VPSRLD $0x14, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x0c, Y9, Y15 + VPSRLD $0x14, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x0c, Y10, Y15 + VPSRLD $0x14, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x0c, Y11, Y15 + VPSRLD $0x14, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y3, Y3 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + VMOVDQA Y15, 224(BP) + VPSLLD $0x07, Y14, Y15 + VPSRLD $0x19, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x07, Y9, Y15 + VPSRLD $0x19, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x07, Y10, Y15 + VPSRLD $0x19, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x07, Y11, Y15 + VPSRLD $0x19, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x0c, Y9, Y9, Y9 + VPALIGNR $0x0c, Y10, Y10, Y10 + VPALIGNR $0x0c, Y11, Y11, Y11 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x08, Y15, Y15, Y15 + VPALIGNR $0x04, Y4, Y4, Y4 + VPALIGNR $0x04, Y1, Y1, Y1 + VPALIGNR $0x04, Y2, Y2, Y2 + VPALIGNR $0x04, Y3, Y3, Y3 + DECQ CX + JNE sealAVX2InternalLoop + VPADDD ·chacha20Constants<>+0(SB), Y0, Y0 + VPADDD ·chacha20Constants<>+0(SB), Y5, Y5 + VPADDD ·chacha20Constants<>+0(SB), Y6, Y6 + VPADDD ·chacha20Constants<>+0(SB), Y7, Y7 + VPADDD 32(BP), Y14, Y14 + VPADDD 32(BP), Y9, Y9 + VPADDD 32(BP), Y10, Y10 + VPADDD 32(BP), Y11, Y11 + VPADDD 64(BP), Y12, Y12 + VPADDD 64(BP), Y13, Y13 + VPADDD 64(BP), Y8, Y8 + VPADDD 64(BP), Y15, Y15 + VPADDD 96(BP), Y4, Y4 + VPADDD 128(BP), Y1, Y1 + VPADDD 160(BP), Y2, Y2 + VPADDD 192(BP), Y3, Y3 + VMOVDQA Y15, 224(BP) + + // We only hashed 480 of the 512 bytes available - hash the remaining 32 here + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 32(DI), DI + VPERM2I128 $0x02, Y0, Y14, Y15 + VPERM2I128 $0x13, Y0, Y14, Y14 + VPERM2I128 $0x02, Y12, Y4, Y0 + VPERM2I128 $0x13, Y12, Y4, Y12 + VPXOR (SI), Y15, Y15 + VPXOR 32(SI), Y0, Y0 + VPXOR 64(SI), Y14, Y14 + VPXOR 96(SI), Y12, Y12 + VMOVDQU Y15, (DI) + VMOVDQU Y0, 32(DI) + VMOVDQU Y14, 64(DI) + VMOVDQU Y12, 96(DI) + VPERM2I128 $0x02, Y5, Y9, Y0 + VPERM2I128 $0x02, Y13, Y1, Y14 + VPERM2I128 $0x13, Y5, Y9, Y12 + VPERM2I128 $0x13, Y13, Y1, Y4 + VPXOR 128(SI), Y0, Y0 + VPXOR 160(SI), Y14, Y14 + VPXOR 192(SI), Y12, Y12 + VPXOR 224(SI), Y4, Y4 + VMOVDQU Y0, 128(DI) + VMOVDQU Y14, 160(DI) + VMOVDQU Y12, 192(DI) + VMOVDQU Y4, 224(DI) + + // and here + ADDQ -16(DI), R10 + ADCQ -8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + VPERM2I128 $0x02, Y6, Y10, Y0 + VPERM2I128 $0x02, Y8, Y2, Y14 + VPERM2I128 $0x13, Y6, Y10, Y12 + VPERM2I128 $0x13, Y8, Y2, Y4 + VPXOR 256(SI), Y0, Y0 + VPXOR 288(SI), Y14, Y14 + VPXOR 320(SI), Y12, Y12 + VPXOR 352(SI), Y4, Y4 + VMOVDQU Y0, 256(DI) + VMOVDQU Y14, 288(DI) + VMOVDQU Y12, 320(DI) + VMOVDQU Y4, 352(DI) + VPERM2I128 $0x02, Y7, Y11, Y0 + VPERM2I128 $0x02, 224(BP), Y3, Y14 + VPERM2I128 $0x13, Y7, Y11, Y12 + VPERM2I128 $0x13, 224(BP), Y3, Y4 + VPXOR 384(SI), Y0, Y0 + VPXOR 416(SI), Y14, Y14 + VPXOR 448(SI), Y12, Y12 + VPXOR 480(SI), Y4, Y4 + VMOVDQU Y0, 384(DI) + VMOVDQU Y14, 416(DI) + VMOVDQU Y12, 448(DI) + VMOVDQU Y4, 480(DI) + LEAQ 512(SI), SI + SUBQ $0x00000200, BX + CMPQ BX, $0x00000200 + JG sealAVX2MainLoop + + // Tail can only hash 480 bytes + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + ADDQ 16(DI), R10 + ADCQ 24(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 32(DI), DI + MOVQ $0x0000000a, CX + MOVQ $0x00000000, R9 + CMPQ BX, $0x80 + JBE sealAVX2Tail128 + CMPQ BX, $0x00000100 + JBE sealAVX2Tail256 + CMPQ BX, $0x00000180 + JBE sealAVX2Tail384 + JMP sealAVX2Tail512 + +seal192AVX2: + VMOVDQA Y0, Y5 + VMOVDQA Y14, Y9 + VMOVDQA Y12, Y13 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y1 + VMOVDQA Y0, Y6 + VMOVDQA Y14, Y10 + VMOVDQA Y12, Y8 + VMOVDQA Y4, Y2 + VMOVDQA Y1, Y15 + MOVQ $0x0000000a, R9 + +sealAVX2192InnerCipherLoop: + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x04, Y9, Y9, Y9 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPALIGNR $0x0c, Y1, Y1, Y1 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x0c, Y9, Y9, Y9 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x04, Y4, Y4, Y4 + VPALIGNR $0x04, Y1, Y1, Y1 + DECQ R9 + JNE sealAVX2192InnerCipherLoop + VPADDD Y6, Y0, Y0 + VPADDD Y6, Y5, Y5 + VPADDD Y10, Y14, Y14 + VPADDD Y10, Y9, Y9 + VPADDD Y8, Y12, Y12 + VPADDD Y8, Y13, Y13 + VPADDD Y2, Y4, Y4 + VPADDD Y15, Y1, Y1 + VPERM2I128 $0x02, Y0, Y14, Y3 + + // Clamp and store poly key + VPAND ·polyClampMask<>+0(SB), Y3, Y3 + VMOVDQA Y3, (BP) + + // Stream for up to 192 bytes + VPERM2I128 $0x13, Y0, Y14, Y0 + VPERM2I128 $0x13, Y12, Y4, Y14 + VPERM2I128 $0x02, Y5, Y9, Y12 + VPERM2I128 $0x02, Y13, Y1, Y4 + VPERM2I128 $0x13, Y5, Y9, Y5 + VPERM2I128 $0x13, Y13, Y1, Y9 + +sealAVX2ShortSeal: + // Hash aad + MOVQ ad_len+80(FP), R9 + CALL polyHashADInternal<>(SB) + XORQ CX, CX + +sealAVX2SealHash: + // itr1 holds the number of bytes encrypted but not yet hashed + CMPQ CX, $0x10 + JB sealAVX2ShortSealLoop + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + SUBQ $0x10, CX + ADDQ $0x10, DI + JMP sealAVX2SealHash + +sealAVX2ShortSealLoop: + CMPQ BX, $0x20 + JB sealAVX2ShortTail32 + SUBQ $0x20, BX + + // Load for encryption + VPXOR (SI), Y0, Y0 + VMOVDQU Y0, (DI) + LEAQ 32(SI), SI + + // Now can hash + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + ADDQ 16(DI), R10 + ADCQ 24(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 32(DI), DI + + // Shift stream left + VMOVDQA Y14, Y0 + VMOVDQA Y12, Y14 + VMOVDQA Y4, Y12 + VMOVDQA Y5, Y4 + VMOVDQA Y9, Y5 + VMOVDQA Y13, Y9 + VMOVDQA Y1, Y13 + VMOVDQA Y6, Y1 + VMOVDQA Y10, Y6 + JMP sealAVX2ShortSealLoop + +sealAVX2ShortTail32: + CMPQ BX, $0x10 + VMOVDQA X0, X1 + JB sealAVX2ShortDone + SUBQ $0x10, BX + + // Load for encryption + VPXOR (SI), X0, X12 + VMOVDQU X12, (DI) + LEAQ 16(SI), SI + + // Hash + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(DI), DI + VPERM2I128 $0x11, Y0, Y0, Y0 + VMOVDQA X0, X1 + +sealAVX2ShortDone: + VZEROUPPER + JMP sealSSETail + +seal320AVX2: + VMOVDQA Y0, Y5 + VMOVDQA Y14, Y9 + VMOVDQA Y12, Y13 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y1 + VMOVDQA Y0, Y6 + VMOVDQA Y14, Y10 + VMOVDQA Y12, Y8 + VPADDD ·avx2IncMask<>+0(SB), Y1, Y2 + VMOVDQA Y14, Y7 + VMOVDQA Y12, Y11 + VMOVDQA Y4, Y15 + MOVQ $0x0000000a, R9 + +sealAVX2320InnerCipherLoop: + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x0c, Y10, Y3 + VPSRLD $0x14, Y10, Y10 + VPXOR Y3, Y10, Y10 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x07, Y10, Y3 + VPSRLD $0x19, Y10, Y10 + VPXOR Y3, Y10, Y10 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x04, Y9, Y9, Y9 + VPALIGNR $0x04, Y10, Y10, Y10 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPALIGNR $0x0c, Y1, Y1, Y1 + VPALIGNR $0x0c, Y2, Y2, Y2 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x0c, Y10, Y3 + VPSRLD $0x14, Y10, Y10 + VPXOR Y3, Y10, Y10 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x07, Y10, Y3 + VPSRLD $0x19, Y10, Y10 + VPXOR Y3, Y10, Y10 + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x0c, Y9, Y9, Y9 + VPALIGNR $0x0c, Y10, Y10, Y10 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x04, Y4, Y4, Y4 + VPALIGNR $0x04, Y1, Y1, Y1 + VPALIGNR $0x04, Y2, Y2, Y2 + DECQ R9 + JNE sealAVX2320InnerCipherLoop + VMOVDQA ·chacha20Constants<>+0(SB), Y3 + VPADDD Y3, Y0, Y0 + VPADDD Y3, Y5, Y5 + VPADDD Y3, Y6, Y6 + VPADDD Y7, Y14, Y14 + VPADDD Y7, Y9, Y9 + VPADDD Y7, Y10, Y10 + VPADDD Y11, Y12, Y12 + VPADDD Y11, Y13, Y13 + VPADDD Y11, Y8, Y8 + VMOVDQA ·avx2IncMask<>+0(SB), Y3 + VPADDD Y15, Y4, Y4 + VPADDD Y3, Y15, Y15 + VPADDD Y15, Y1, Y1 + VPADDD Y3, Y15, Y15 + VPADDD Y15, Y2, Y2 + + // Clamp and store poly key + VPERM2I128 $0x02, Y0, Y14, Y3 + VPAND ·polyClampMask<>+0(SB), Y3, Y3 + VMOVDQA Y3, (BP) + + // Stream for up to 320 bytes + VPERM2I128 $0x13, Y0, Y14, Y0 + VPERM2I128 $0x13, Y12, Y4, Y14 + VPERM2I128 $0x02, Y5, Y9, Y12 + VPERM2I128 $0x02, Y13, Y1, Y4 + VPERM2I128 $0x13, Y5, Y9, Y5 + VPERM2I128 $0x13, Y13, Y1, Y9 + VPERM2I128 $0x02, Y6, Y10, Y13 + VPERM2I128 $0x02, Y8, Y2, Y1 + VPERM2I128 $0x13, Y6, Y10, Y6 + VPERM2I128 $0x13, Y8, Y2, Y10 + JMP sealAVX2ShortSeal + +sealAVX2Tail128: + VMOVDQA ·chacha20Constants<>+0(SB), Y0 + VMOVDQA 32(BP), Y14 + VMOVDQA 64(BP), Y12 + VMOVDQA 192(BP), Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y4 + VMOVDQA Y4, Y1 + +sealAVX2Tail128LoopA: + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(DI), DI + +sealAVX2Tail128LoopB: + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + ADDQ 16(DI), R10 + ADCQ 24(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 32(DI), DI + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x04, Y4, Y4, Y4 + DECQ CX + JG sealAVX2Tail128LoopA + DECQ R9 + JGE sealAVX2Tail128LoopB + VPADDD ·chacha20Constants<>+0(SB), Y0, Y5 + VPADDD 32(BP), Y14, Y9 + VPADDD 64(BP), Y12, Y13 + VPADDD Y1, Y4, Y1 + VPERM2I128 $0x02, Y5, Y9, Y0 + VPERM2I128 $0x02, Y13, Y1, Y14 + VPERM2I128 $0x13, Y5, Y9, Y12 + VPERM2I128 $0x13, Y13, Y1, Y4 + JMP sealAVX2ShortSealLoop + +sealAVX2Tail256: + VMOVDQA ·chacha20Constants<>+0(SB), Y0 + VMOVDQA ·chacha20Constants<>+0(SB), Y5 + VMOVDQA 32(BP), Y14 + VMOVDQA 32(BP), Y9 + VMOVDQA 64(BP), Y12 + VMOVDQA 64(BP), Y13 + VMOVDQA 192(BP), Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y1 + VMOVDQA Y4, Y7 + VMOVDQA Y1, Y11 + +sealAVX2Tail256LoopA: + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(DI), DI + +sealAVX2Tail256LoopB: + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x04, Y9, Y9, Y9 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPALIGNR $0x0c, Y1, Y1, Y1 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + ADDQ 16(DI), R10 + ADCQ 24(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 32(DI), DI + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x0c, Y9, Y9, Y9 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x04, Y4, Y4, Y4 + VPALIGNR $0x04, Y1, Y1, Y1 + DECQ CX + JG sealAVX2Tail256LoopA + DECQ R9 + JGE sealAVX2Tail256LoopB + VPADDD ·chacha20Constants<>+0(SB), Y0, Y0 + VPADDD ·chacha20Constants<>+0(SB), Y5, Y5 + VPADDD 32(BP), Y14, Y14 + VPADDD 32(BP), Y9, Y9 + VPADDD 64(BP), Y12, Y12 + VPADDD 64(BP), Y13, Y13 + VPADDD Y7, Y4, Y4 + VPADDD Y11, Y1, Y1 + VPERM2I128 $0x02, Y0, Y14, Y3 + VPERM2I128 $0x02, Y12, Y4, Y7 + VPERM2I128 $0x13, Y0, Y14, Y11 + VPERM2I128 $0x13, Y12, Y4, Y15 + VPXOR (SI), Y3, Y3 + VPXOR 32(SI), Y7, Y7 + VPXOR 64(SI), Y11, Y11 + VPXOR 96(SI), Y15, Y15 + VMOVDQU Y3, (DI) + VMOVDQU Y7, 32(DI) + VMOVDQU Y11, 64(DI) + VMOVDQU Y15, 96(DI) + MOVQ $0x00000080, CX + LEAQ 128(SI), SI + SUBQ $0x80, BX + VPERM2I128 $0x02, Y5, Y9, Y0 + VPERM2I128 $0x02, Y13, Y1, Y14 + VPERM2I128 $0x13, Y5, Y9, Y12 + VPERM2I128 $0x13, Y13, Y1, Y4 + JMP sealAVX2SealHash + +sealAVX2Tail384: + VMOVDQA ·chacha20Constants<>+0(SB), Y0 + VMOVDQA Y0, Y5 + VMOVDQA Y0, Y6 + VMOVDQA 32(BP), Y14 + VMOVDQA Y14, Y9 + VMOVDQA Y14, Y10 + VMOVDQA 64(BP), Y12 + VMOVDQA Y12, Y13 + VMOVDQA Y12, Y8 + VMOVDQA 192(BP), Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y1 + VPADDD ·avx2IncMask<>+0(SB), Y1, Y2 + VMOVDQA Y4, Y7 + VMOVDQA Y1, Y11 + VMOVDQA Y2, Y15 + +sealAVX2Tail384LoopA: + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(DI), DI + +sealAVX2Tail384LoopB: + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x0c, Y10, Y3 + VPSRLD $0x14, Y10, Y10 + VPXOR Y3, Y10, Y10 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x07, Y10, Y3 + VPSRLD $0x19, Y10, Y10 + VPXOR Y3, Y10, Y10 + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x04, Y9, Y9, Y9 + VPALIGNR $0x04, Y10, Y10, Y10 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPALIGNR $0x0c, Y1, Y1, Y1 + VPALIGNR $0x0c, Y2, Y2, Y2 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x0c, Y14, Y3 + VPSRLD $0x14, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y14, Y0, Y0 + VPXOR Y0, Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPADDD Y4, Y12, Y12 + VPXOR Y12, Y14, Y14 + VPSLLD $0x07, Y14, Y3 + VPSRLD $0x19, Y14, Y14 + VPXOR Y3, Y14, Y14 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x0c, Y9, Y3 + VPSRLD $0x14, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y9, Y5, Y5 + VPXOR Y5, Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPADDD Y1, Y13, Y13 + VPXOR Y13, Y9, Y9 + VPSLLD $0x07, Y9, Y3 + VPSRLD $0x19, Y9, Y9 + VPXOR Y3, Y9, Y9 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x0c, Y10, Y3 + VPSRLD $0x14, Y10, Y10 + VPXOR Y3, Y10, Y10 + VPADDD Y10, Y6, Y6 + VPXOR Y6, Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPADDD Y2, Y8, Y8 + VPXOR Y8, Y10, Y10 + VPSLLD $0x07, Y10, Y3 + VPSRLD $0x19, Y10, Y10 + VPXOR Y3, Y10, Y10 + ADDQ 16(DI), R10 + ADCQ 24(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 32(DI), DI + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x0c, Y9, Y9, Y9 + VPALIGNR $0x0c, Y10, Y10, Y10 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x04, Y4, Y4, Y4 + VPALIGNR $0x04, Y1, Y1, Y1 + VPALIGNR $0x04, Y2, Y2, Y2 + DECQ CX + JG sealAVX2Tail384LoopA + DECQ R9 + JGE sealAVX2Tail384LoopB + VPADDD ·chacha20Constants<>+0(SB), Y0, Y0 + VPADDD ·chacha20Constants<>+0(SB), Y5, Y5 + VPADDD ·chacha20Constants<>+0(SB), Y6, Y6 + VPADDD 32(BP), Y14, Y14 + VPADDD 32(BP), Y9, Y9 + VPADDD 32(BP), Y10, Y10 + VPADDD 64(BP), Y12, Y12 + VPADDD 64(BP), Y13, Y13 + VPADDD 64(BP), Y8, Y8 + VPADDD Y7, Y4, Y4 + VPADDD Y11, Y1, Y1 + VPADDD Y15, Y2, Y2 + VPERM2I128 $0x02, Y0, Y14, Y3 + VPERM2I128 $0x02, Y12, Y4, Y7 + VPERM2I128 $0x13, Y0, Y14, Y11 + VPERM2I128 $0x13, Y12, Y4, Y15 + VPXOR (SI), Y3, Y3 + VPXOR 32(SI), Y7, Y7 + VPXOR 64(SI), Y11, Y11 + VPXOR 96(SI), Y15, Y15 + VMOVDQU Y3, (DI) + VMOVDQU Y7, 32(DI) + VMOVDQU Y11, 64(DI) + VMOVDQU Y15, 96(DI) + VPERM2I128 $0x02, Y5, Y9, Y3 + VPERM2I128 $0x02, Y13, Y1, Y7 + VPERM2I128 $0x13, Y5, Y9, Y11 + VPERM2I128 $0x13, Y13, Y1, Y15 + VPXOR 128(SI), Y3, Y3 + VPXOR 160(SI), Y7, Y7 + VPXOR 192(SI), Y11, Y11 + VPXOR 224(SI), Y15, Y15 + VMOVDQU Y3, 128(DI) + VMOVDQU Y7, 160(DI) + VMOVDQU Y11, 192(DI) + VMOVDQU Y15, 224(DI) + MOVQ $0x00000100, CX + LEAQ 256(SI), SI + SUBQ $0x00000100, BX + VPERM2I128 $0x02, Y6, Y10, Y0 + VPERM2I128 $0x02, Y8, Y2, Y14 + VPERM2I128 $0x13, Y6, Y10, Y12 + VPERM2I128 $0x13, Y8, Y2, Y4 + JMP sealAVX2SealHash + +sealAVX2Tail512: + VMOVDQA ·chacha20Constants<>+0(SB), Y0 + VMOVDQA Y0, Y5 + VMOVDQA Y0, Y6 + VMOVDQA Y0, Y7 + VMOVDQA 32(BP), Y14 + VMOVDQA Y14, Y9 + VMOVDQA Y14, Y10 + VMOVDQA Y14, Y11 + VMOVDQA 64(BP), Y12 + VMOVDQA Y12, Y13 + VMOVDQA Y12, Y8 + VMOVDQA Y12, Y15 + VMOVDQA 192(BP), Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y4 + VPADDD ·avx2IncMask<>+0(SB), Y4, Y1 + VPADDD ·avx2IncMask<>+0(SB), Y1, Y2 + VPADDD ·avx2IncMask<>+0(SB), Y2, Y3 + VMOVDQA Y4, 96(BP) + VMOVDQA Y1, 128(BP) + VMOVDQA Y2, 160(BP) + VMOVDQA Y3, 192(BP) + +sealAVX2Tail512LoopA: + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), AX + MOVQ AX, R15 + MULQ R10 + MOVQ AX, R13 + MOVQ DX, R14 + MOVQ (BP), AX + MULQ R11 + IMULQ R12, R15 + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), AX + MOVQ AX, R8 + MULQ R10 + ADDQ AX, R14 + ADCQ $0x00, DX + MOVQ DX, R10 + MOVQ 8(BP), AX + MULQ R11 + ADDQ AX, R15 + ADCQ $0x00, DX + IMULQ R12, R8 + ADDQ R10, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 16(DI), DI + +sealAVX2Tail512LoopB: + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y3, Y3 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + VMOVDQA Y15, 224(BP) + VPSLLD $0x0c, Y14, Y15 + VPSRLD $0x14, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x0c, Y9, Y15 + VPSRLD $0x14, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x0c, Y10, Y15 + VPSRLD $0x14, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x0c, Y11, Y15 + VPSRLD $0x14, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + ADDQ (DI), R10 + ADCQ 8(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y3, Y3 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + VMOVDQA Y15, 224(BP) + VPSLLD $0x07, Y14, Y15 + VPSRLD $0x19, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x07, Y9, Y15 + VPSRLD $0x19, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x07, Y10, Y15 + VPSRLD $0x19, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x07, Y11, Y15 + VPSRLD $0x19, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + VPALIGNR $0x04, Y14, Y14, Y14 + VPALIGNR $0x04, Y9, Y9, Y9 + VPALIGNR $0x04, Y10, Y10, Y10 + VPALIGNR $0x04, Y11, Y11, Y11 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x08, Y15, Y15, Y15 + VPALIGNR $0x0c, Y4, Y4, Y4 + VPALIGNR $0x0c, Y1, Y1, Y1 + VPALIGNR $0x0c, Y2, Y2, Y2 + VPALIGNR $0x0c, Y3, Y3, Y3 + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol16<>+0(SB), Y4, Y4 + VPSHUFB ·rol16<>+0(SB), Y1, Y1 + VPSHUFB ·rol16<>+0(SB), Y2, Y2 + VPSHUFB ·rol16<>+0(SB), Y3, Y3 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + ADDQ 16(DI), R10 + ADCQ 24(DI), R11 + ADCQ $0x01, R12 + MOVQ (BP), DX + MOVQ DX, R15 + MULXQ R10, R13, R14 + IMULQ R12, R15 + MULXQ R11, AX, DX + ADDQ AX, R14 + ADCQ DX, R15 + MOVQ 8(BP), DX + MULXQ R10, R10, AX + ADDQ R10, R14 + MULXQ R11, R11, R8 + ADCQ R11, R15 + ADCQ $0x00, R8 + IMULQ R12, DX + ADDQ AX, R15 + ADCQ DX, R8 + MOVQ R13, R10 + MOVQ R14, R11 + MOVQ R15, R12 + ANDQ $0x03, R12 + MOVQ R15, R13 + ANDQ $-4, R13 + MOVQ R8, R14 + SHRQ $0x02, R8, R15 + SHRQ $0x02, R8 + ADDQ R13, R10 + ADCQ R14, R11 + ADCQ $0x00, R12 + ADDQ R15, R10 + ADCQ R8, R11 + ADCQ $0x00, R12 + LEAQ 32(DI), DI + VMOVDQA Y15, 224(BP) + VPSLLD $0x0c, Y14, Y15 + VPSRLD $0x14, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x0c, Y9, Y15 + VPSRLD $0x14, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x0c, Y10, Y15 + VPSRLD $0x14, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x0c, Y11, Y15 + VPSRLD $0x14, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + VPADDD Y14, Y0, Y0 + VPADDD Y9, Y5, Y5 + VPADDD Y10, Y6, Y6 + VPADDD Y11, Y7, Y7 + VPXOR Y0, Y4, Y4 + VPXOR Y5, Y1, Y1 + VPXOR Y6, Y2, Y2 + VPXOR Y7, Y3, Y3 + VPSHUFB ·rol8<>+0(SB), Y4, Y4 + VPSHUFB ·rol8<>+0(SB), Y1, Y1 + VPSHUFB ·rol8<>+0(SB), Y2, Y2 + VPSHUFB ·rol8<>+0(SB), Y3, Y3 + VPADDD Y4, Y12, Y12 + VPADDD Y1, Y13, Y13 + VPADDD Y2, Y8, Y8 + VPADDD Y3, Y15, Y15 + VPXOR Y12, Y14, Y14 + VPXOR Y13, Y9, Y9 + VPXOR Y8, Y10, Y10 + VPXOR Y15, Y11, Y11 + VMOVDQA Y15, 224(BP) + VPSLLD $0x07, Y14, Y15 + VPSRLD $0x19, Y14, Y14 + VPXOR Y15, Y14, Y14 + VPSLLD $0x07, Y9, Y15 + VPSRLD $0x19, Y9, Y9 + VPXOR Y15, Y9, Y9 + VPSLLD $0x07, Y10, Y15 + VPSRLD $0x19, Y10, Y10 + VPXOR Y15, Y10, Y10 + VPSLLD $0x07, Y11, Y15 + VPSRLD $0x19, Y11, Y11 + VPXOR Y15, Y11, Y11 + VMOVDQA 224(BP), Y15 + VPALIGNR $0x0c, Y14, Y14, Y14 + VPALIGNR $0x0c, Y9, Y9, Y9 + VPALIGNR $0x0c, Y10, Y10, Y10 + VPALIGNR $0x0c, Y11, Y11, Y11 + VPALIGNR $0x08, Y12, Y12, Y12 + VPALIGNR $0x08, Y13, Y13, Y13 + VPALIGNR $0x08, Y8, Y8, Y8 + VPALIGNR $0x08, Y15, Y15, Y15 + VPALIGNR $0x04, Y4, Y4, Y4 + VPALIGNR $0x04, Y1, Y1, Y1 + VPALIGNR $0x04, Y2, Y2, Y2 + VPALIGNR $0x04, Y3, Y3, Y3 + DECQ CX + JG sealAVX2Tail512LoopA + DECQ R9 + JGE sealAVX2Tail512LoopB + VPADDD ·chacha20Constants<>+0(SB), Y0, Y0 + VPADDD ·chacha20Constants<>+0(SB), Y5, Y5 + VPADDD ·chacha20Constants<>+0(SB), Y6, Y6 + VPADDD ·chacha20Constants<>+0(SB), Y7, Y7 + VPADDD 32(BP), Y14, Y14 + VPADDD 32(BP), Y9, Y9 + VPADDD 32(BP), Y10, Y10 + VPADDD 32(BP), Y11, Y11 + VPADDD 64(BP), Y12, Y12 + VPADDD 64(BP), Y13, Y13 + VPADDD 64(BP), Y8, Y8 + VPADDD 64(BP), Y15, Y15 + VPADDD 96(BP), Y4, Y4 + VPADDD 128(BP), Y1, Y1 + VPADDD 160(BP), Y2, Y2 + VPADDD 192(BP), Y3, Y3 + VMOVDQA Y15, 224(BP) + VPERM2I128 $0x02, Y0, Y14, Y15 + VPXOR (SI), Y15, Y15 + VMOVDQU Y15, (DI) + VPERM2I128 $0x02, Y12, Y4, Y15 + VPXOR 32(SI), Y15, Y15 + VMOVDQU Y15, 32(DI) + VPERM2I128 $0x13, Y0, Y14, Y15 + VPXOR 64(SI), Y15, Y15 + VMOVDQU Y15, 64(DI) + VPERM2I128 $0x13, Y12, Y4, Y15 + VPXOR 96(SI), Y15, Y15 + VMOVDQU Y15, 96(DI) + VPERM2I128 $0x02, Y5, Y9, Y0 + VPERM2I128 $0x02, Y13, Y1, Y14 + VPERM2I128 $0x13, Y5, Y9, Y12 + VPERM2I128 $0x13, Y13, Y1, Y4 + VPXOR 128(SI), Y0, Y0 + VPXOR 160(SI), Y14, Y14 + VPXOR 192(SI), Y12, Y12 + VPXOR 224(SI), Y4, Y4 + VMOVDQU Y0, 128(DI) + VMOVDQU Y14, 160(DI) + VMOVDQU Y12, 192(DI) + VMOVDQU Y4, 224(DI) + VPERM2I128 $0x02, Y6, Y10, Y0 + VPERM2I128 $0x02, Y8, Y2, Y14 + VPERM2I128 $0x13, Y6, Y10, Y12 + VPERM2I128 $0x13, Y8, Y2, Y4 + VPXOR 256(SI), Y0, Y0 + VPXOR 288(SI), Y14, Y14 + VPXOR 320(SI), Y12, Y12 + VPXOR 352(SI), Y4, Y4 + VMOVDQU Y0, 256(DI) + VMOVDQU Y14, 288(DI) + VMOVDQU Y12, 320(DI) + VMOVDQU Y4, 352(DI) + MOVQ $0x00000180, CX + LEAQ 384(SI), SI + SUBQ $0x00000180, BX + VPERM2I128 $0x02, Y7, Y11, Y0 + VPERM2I128 $0x02, 224(BP), Y3, Y14 + VPERM2I128 $0x13, Y7, Y11, Y12 + VPERM2I128 $0x13, 224(BP), Y3, Y4 + JMP sealAVX2SealHash diff --git a/backend/vendor/golang.org/x/crypto/chacha20poly1305/chacha20poly1305_generic.go b/backend/vendor/golang.org/x/crypto/chacha20poly1305/chacha20poly1305_generic.go new file mode 100644 index 0000000..6313898 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/chacha20poly1305/chacha20poly1305_generic.go @@ -0,0 +1,81 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package chacha20poly1305 + +import ( + "encoding/binary" + + "golang.org/x/crypto/chacha20" + "golang.org/x/crypto/internal/alias" + "golang.org/x/crypto/internal/poly1305" +) + +func writeWithPadding(p *poly1305.MAC, b []byte) { + p.Write(b) + if rem := len(b) % 16; rem != 0 { + var buf [16]byte + padLen := 16 - rem + p.Write(buf[:padLen]) + } +} + +func writeUint64(p *poly1305.MAC, n int) { + var buf [8]byte + binary.LittleEndian.PutUint64(buf[:], uint64(n)) + p.Write(buf[:]) +} + +func (c *chacha20poly1305) sealGeneric(dst, nonce, plaintext, additionalData []byte) []byte { + ret, out := sliceForAppend(dst, len(plaintext)+poly1305.TagSize) + ciphertext, tag := out[:len(plaintext)], out[len(plaintext):] + if alias.InexactOverlap(out, plaintext) { + panic("chacha20poly1305: invalid buffer overlap") + } + + var polyKey [32]byte + s, _ := chacha20.NewUnauthenticatedCipher(c.key[:], nonce) + s.XORKeyStream(polyKey[:], polyKey[:]) + s.SetCounter(1) // set the counter to 1, skipping 32 bytes + s.XORKeyStream(ciphertext, plaintext) + + p := poly1305.New(&polyKey) + writeWithPadding(p, additionalData) + writeWithPadding(p, ciphertext) + writeUint64(p, len(additionalData)) + writeUint64(p, len(plaintext)) + p.Sum(tag[:0]) + + return ret +} + +func (c *chacha20poly1305) openGeneric(dst, nonce, ciphertext, additionalData []byte) ([]byte, error) { + tag := ciphertext[len(ciphertext)-16:] + ciphertext = ciphertext[:len(ciphertext)-16] + + var polyKey [32]byte + s, _ := chacha20.NewUnauthenticatedCipher(c.key[:], nonce) + s.XORKeyStream(polyKey[:], polyKey[:]) + s.SetCounter(1) // set the counter to 1, skipping 32 bytes + + p := poly1305.New(&polyKey) + writeWithPadding(p, additionalData) + writeWithPadding(p, ciphertext) + writeUint64(p, len(additionalData)) + writeUint64(p, len(ciphertext)) + + ret, out := sliceForAppend(dst, len(ciphertext)) + if alias.InexactOverlap(out, ciphertext) { + panic("chacha20poly1305: invalid buffer overlap") + } + if !p.Verify(tag) { + for i := range out { + out[i] = 0 + } + return nil, errOpen + } + + s.XORKeyStream(out, ciphertext) + return ret, nil +} diff --git a/backend/vendor/golang.org/x/crypto/chacha20poly1305/chacha20poly1305_noasm.go b/backend/vendor/golang.org/x/crypto/chacha20poly1305/chacha20poly1305_noasm.go new file mode 100644 index 0000000..34e6ab1 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/chacha20poly1305/chacha20poly1305_noasm.go @@ -0,0 +1,15 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build !amd64 || !gc || purego + +package chacha20poly1305 + +func (c *chacha20poly1305) seal(dst, nonce, plaintext, additionalData []byte) []byte { + return c.sealGeneric(dst, nonce, plaintext, additionalData) +} + +func (c *chacha20poly1305) open(dst, nonce, ciphertext, additionalData []byte) ([]byte, error) { + return c.openGeneric(dst, nonce, ciphertext, additionalData) +} diff --git a/backend/vendor/golang.org/x/crypto/chacha20poly1305/xchacha20poly1305.go b/backend/vendor/golang.org/x/crypto/chacha20poly1305/xchacha20poly1305.go new file mode 100644 index 0000000..1cebfe9 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/chacha20poly1305/xchacha20poly1305.go @@ -0,0 +1,86 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package chacha20poly1305 + +import ( + "crypto/cipher" + "errors" + + "golang.org/x/crypto/chacha20" +) + +type xchacha20poly1305 struct { + key [KeySize]byte +} + +// NewX returns a XChaCha20-Poly1305 AEAD that uses the given 256-bit key. +// +// XChaCha20-Poly1305 is a ChaCha20-Poly1305 variant that takes a longer nonce, +// suitable to be generated randomly without risk of collisions. It should be +// preferred when nonce uniqueness cannot be trivially ensured, or whenever +// nonces are randomly generated. +func NewX(key []byte) (cipher.AEAD, error) { + if len(key) != KeySize { + return nil, errors.New("chacha20poly1305: bad key length") + } + ret := new(xchacha20poly1305) + copy(ret.key[:], key) + return ret, nil +} + +func (*xchacha20poly1305) NonceSize() int { + return NonceSizeX +} + +func (*xchacha20poly1305) Overhead() int { + return Overhead +} + +func (x *xchacha20poly1305) Seal(dst, nonce, plaintext, additionalData []byte) []byte { + if len(nonce) != NonceSizeX { + panic("chacha20poly1305: bad nonce length passed to Seal") + } + + // XChaCha20-Poly1305 technically supports a 64-bit counter, so there is no + // size limit. However, since we reuse the ChaCha20-Poly1305 implementation, + // the second half of the counter is not available. This is unlikely to be + // an issue because the cipher.AEAD API requires the entire message to be in + // memory, and the counter overflows at 256 GB. + if uint64(len(plaintext)) > (1<<38)-64 { + panic("chacha20poly1305: plaintext too large") + } + + c := new(chacha20poly1305) + hKey, _ := chacha20.HChaCha20(x.key[:], nonce[0:16]) + copy(c.key[:], hKey) + + // The first 4 bytes of the final nonce are unused counter space. + cNonce := make([]byte, NonceSize) + copy(cNonce[4:12], nonce[16:24]) + + return c.seal(dst, cNonce[:], plaintext, additionalData) +} + +func (x *xchacha20poly1305) Open(dst, nonce, ciphertext, additionalData []byte) ([]byte, error) { + if len(nonce) != NonceSizeX { + panic("chacha20poly1305: bad nonce length passed to Open") + } + if len(ciphertext) < 16 { + return nil, errOpen + } + if uint64(len(ciphertext)) > (1<<38)-48 { + panic("chacha20poly1305: ciphertext too large") + } + + c := new(chacha20poly1305) + hKey, _ := chacha20.HChaCha20(x.key[:], nonce[0:16]) + copy(c.key[:], hKey) + + // The first 4 bytes of the final nonce are unused counter space. + cNonce := make([]byte, NonceSize) + copy(cNonce[4:12], nonce[16:24]) + + return c.open(dst, cNonce[:], ciphertext, additionalData) +} diff --git a/backend/vendor/golang.org/x/crypto/hkdf/hkdf.go b/backend/vendor/golang.org/x/crypto/hkdf/hkdf.go new file mode 100644 index 0000000..3bee662 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/hkdf/hkdf.go @@ -0,0 +1,95 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package hkdf implements the HMAC-based Extract-and-Expand Key Derivation +// Function (HKDF) as defined in RFC 5869. +// +// HKDF is a cryptographic key derivation function (KDF) with the goal of +// expanding limited input keying material into one or more cryptographically +// strong secret keys. +package hkdf + +import ( + "crypto/hmac" + "errors" + "hash" + "io" +) + +// Extract generates a pseudorandom key for use with Expand from an input secret +// and an optional independent salt. +// +// Only use this function if you need to reuse the extracted key with multiple +// Expand invocations and different context values. Most common scenarios, +// including the generation of multiple keys, should use New instead. +func Extract(hash func() hash.Hash, secret, salt []byte) []byte { + if salt == nil { + salt = make([]byte, hash().Size()) + } + extractor := hmac.New(hash, salt) + extractor.Write(secret) + return extractor.Sum(nil) +} + +type hkdf struct { + expander hash.Hash + size int + + info []byte + counter byte + + prev []byte + buf []byte +} + +func (f *hkdf) Read(p []byte) (int, error) { + // Check whether enough data can be generated + need := len(p) + remains := len(f.buf) + int(255-f.counter+1)*f.size + if remains < need { + return 0, errors.New("hkdf: entropy limit reached") + } + // Read any leftover from the buffer + n := copy(p, f.buf) + p = p[n:] + + // Fill the rest of the buffer + for len(p) > 0 { + if f.counter > 1 { + f.expander.Reset() + } + f.expander.Write(f.prev) + f.expander.Write(f.info) + f.expander.Write([]byte{f.counter}) + f.prev = f.expander.Sum(f.prev[:0]) + f.counter++ + + // Copy the new batch into p + f.buf = f.prev + n = copy(p, f.buf) + p = p[n:] + } + // Save leftovers for next run + f.buf = f.buf[n:] + + return need, nil +} + +// Expand returns a Reader, from which keys can be read, using the given +// pseudorandom key and optional context info, skipping the extraction step. +// +// The pseudorandomKey should have been generated by Extract, or be a uniformly +// random or pseudorandom cryptographically strong key. See RFC 5869, Section +// 3.3. Most common scenarios will want to use New instead. +func Expand(hash func() hash.Hash, pseudorandomKey, info []byte) io.Reader { + expander := hmac.New(hash, pseudorandomKey) + return &hkdf{expander, expander.Size(), info, 1, nil, nil} +} + +// New returns a Reader, from which keys can be read, using the given hash, +// secret, salt and context info. Salt and info can be nil. +func New(hash func() hash.Hash, secret, salt, info []byte) io.Reader { + prk := Extract(hash, secret, salt) + return Expand(hash, prk, info) +} diff --git a/backend/vendor/golang.org/x/crypto/internal/alias/alias.go b/backend/vendor/golang.org/x/crypto/internal/alias/alias.go new file mode 100644 index 0000000..551ff0c --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/internal/alias/alias.go @@ -0,0 +1,31 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build !purego + +// Package alias implements memory aliasing tests. +package alias + +import "unsafe" + +// AnyOverlap reports whether x and y share memory at any (not necessarily +// corresponding) index. The memory beyond the slice length is ignored. +func AnyOverlap(x, y []byte) bool { + return len(x) > 0 && len(y) > 0 && + uintptr(unsafe.Pointer(&x[0])) <= uintptr(unsafe.Pointer(&y[len(y)-1])) && + uintptr(unsafe.Pointer(&y[0])) <= uintptr(unsafe.Pointer(&x[len(x)-1])) +} + +// InexactOverlap reports whether x and y share memory at any non-corresponding +// index. The memory beyond the slice length is ignored. Note that x and y can +// have different lengths and still not have any inexact overlap. +// +// InexactOverlap can be used to implement the requirements of the crypto/cipher +// AEAD, Block, BlockMode and Stream interfaces. +func InexactOverlap(x, y []byte) bool { + if len(x) == 0 || len(y) == 0 || &x[0] == &y[0] { + return false + } + return AnyOverlap(x, y) +} diff --git a/backend/vendor/golang.org/x/crypto/internal/alias/alias_purego.go b/backend/vendor/golang.org/x/crypto/internal/alias/alias_purego.go new file mode 100644 index 0000000..6fe61b5 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/internal/alias/alias_purego.go @@ -0,0 +1,34 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build purego + +// Package alias implements memory aliasing tests. +package alias + +// This is the Google App Engine standard variant based on reflect +// because the unsafe package and cgo are disallowed. + +import "reflect" + +// AnyOverlap reports whether x and y share memory at any (not necessarily +// corresponding) index. The memory beyond the slice length is ignored. +func AnyOverlap(x, y []byte) bool { + return len(x) > 0 && len(y) > 0 && + reflect.ValueOf(&x[0]).Pointer() <= reflect.ValueOf(&y[len(y)-1]).Pointer() && + reflect.ValueOf(&y[0]).Pointer() <= reflect.ValueOf(&x[len(x)-1]).Pointer() +} + +// InexactOverlap reports whether x and y share memory at any non-corresponding +// index. The memory beyond the slice length is ignored. Note that x and y can +// have different lengths and still not have any inexact overlap. +// +// InexactOverlap can be used to implement the requirements of the crypto/cipher +// AEAD, Block, BlockMode and Stream interfaces. +func InexactOverlap(x, y []byte) bool { + if len(x) == 0 || len(y) == 0 || &x[0] == &y[0] { + return false + } + return AnyOverlap(x, y) +} diff --git a/backend/vendor/golang.org/x/crypto/internal/poly1305/mac_noasm.go b/backend/vendor/golang.org/x/crypto/internal/poly1305/mac_noasm.go new file mode 100644 index 0000000..8d99551 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/internal/poly1305/mac_noasm.go @@ -0,0 +1,9 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build (!amd64 && !loong64 && !ppc64le && !ppc64 && !s390x) || !gc || purego + +package poly1305 + +type mac struct{ macGeneric } diff --git a/backend/vendor/golang.org/x/crypto/internal/poly1305/poly1305.go b/backend/vendor/golang.org/x/crypto/internal/poly1305/poly1305.go new file mode 100644 index 0000000..4aaea81 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/internal/poly1305/poly1305.go @@ -0,0 +1,99 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package poly1305 implements Poly1305 one-time message authentication code as +// specified in https://cr.yp.to/mac/poly1305-20050329.pdf. +// +// Poly1305 is a fast, one-time authentication function. It is infeasible for an +// attacker to generate an authenticator for a message without the key. However, a +// key must only be used for a single message. Authenticating two different +// messages with the same key allows an attacker to forge authenticators for other +// messages with the same key. +// +// Poly1305 was originally coupled with AES in order to make Poly1305-AES. AES was +// used with a fixed key in order to generate one-time keys from an nonce. +// However, in this package AES isn't used and the one-time key is specified +// directly. +package poly1305 + +import "crypto/subtle" + +// TagSize is the size, in bytes, of a poly1305 authenticator. +const TagSize = 16 + +// Sum generates an authenticator for msg using a one-time key and puts the +// 16-byte result into out. Authenticating two different messages with the same +// key allows an attacker to forge messages at will. +func Sum(out *[16]byte, m []byte, key *[32]byte) { + h := New(key) + h.Write(m) + h.Sum(out[:0]) +} + +// Verify returns true if mac is a valid authenticator for m with the given key. +func Verify(mac *[16]byte, m []byte, key *[32]byte) bool { + var tmp [16]byte + Sum(&tmp, m, key) + return subtle.ConstantTimeCompare(tmp[:], mac[:]) == 1 +} + +// New returns a new MAC computing an authentication +// tag of all data written to it with the given key. +// This allows writing the message progressively instead +// of passing it as a single slice. Common users should use +// the Sum function instead. +// +// The key must be unique for each message, as authenticating +// two different messages with the same key allows an attacker +// to forge messages at will. +func New(key *[32]byte) *MAC { + m := &MAC{} + initialize(key, &m.macState) + return m +} + +// MAC is an io.Writer computing an authentication tag +// of the data written to it. +// +// MAC cannot be used like common hash.Hash implementations, +// because using a poly1305 key twice breaks its security. +// Therefore writing data to a running MAC after calling +// Sum or Verify causes it to panic. +type MAC struct { + mac // platform-dependent implementation + + finalized bool +} + +// Size returns the number of bytes Sum will return. +func (h *MAC) Size() int { return TagSize } + +// Write adds more data to the running message authentication code. +// It never returns an error. +// +// It must not be called after the first call of Sum or Verify. +func (h *MAC) Write(p []byte) (n int, err error) { + if h.finalized { + panic("poly1305: write to MAC after Sum or Verify") + } + return h.mac.Write(p) +} + +// Sum computes the authenticator of all data written to the +// message authentication code. +func (h *MAC) Sum(b []byte) []byte { + var mac [TagSize]byte + h.mac.Sum(&mac) + h.finalized = true + return append(b, mac[:]...) +} + +// Verify returns whether the authenticator of all data written to +// the message authentication code matches the expected value. +func (h *MAC) Verify(expected []byte) bool { + var mac [TagSize]byte + h.mac.Sum(&mac) + h.finalized = true + return subtle.ConstantTimeCompare(expected, mac[:]) == 1 +} diff --git a/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_amd64.s b/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_amd64.s new file mode 100644 index 0000000..1337573 --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_amd64.s @@ -0,0 +1,93 @@ +// Code generated by command: go run sum_amd64_asm.go -out ../sum_amd64.s -pkg poly1305. DO NOT EDIT. + +//go:build gc && !purego + +// func update(state *macState, msg []byte) +TEXT ·update(SB), $0-32 + MOVQ state+0(FP), DI + MOVQ msg_base+8(FP), SI + MOVQ msg_len+16(FP), R15 + MOVQ (DI), R8 + MOVQ 8(DI), R9 + MOVQ 16(DI), R10 + MOVQ 24(DI), R11 + MOVQ 32(DI), R12 + CMPQ R15, $0x10 + JB bytes_between_0_and_15 + +loop: + ADDQ (SI), R8 + ADCQ 8(SI), R9 + ADCQ $0x01, R10 + LEAQ 16(SI), SI + +multiply: + MOVQ R11, AX + MULQ R8 + MOVQ AX, BX + MOVQ DX, CX + MOVQ R11, AX + MULQ R9 + ADDQ AX, CX + ADCQ $0x00, DX + MOVQ R11, R13 + IMULQ R10, R13 + ADDQ DX, R13 + MOVQ R12, AX + MULQ R8 + ADDQ AX, CX + ADCQ $0x00, DX + MOVQ DX, R8 + MOVQ R12, R14 + IMULQ R10, R14 + MOVQ R12, AX + MULQ R9 + ADDQ AX, R13 + ADCQ DX, R14 + ADDQ R8, R13 + ADCQ $0x00, R14 + MOVQ BX, R8 + MOVQ CX, R9 + MOVQ R13, R10 + ANDQ $0x03, R10 + MOVQ R13, BX + ANDQ $-4, BX + ADDQ BX, R8 + ADCQ R14, R9 + ADCQ $0x00, R10 + SHRQ $0x02, R14, R13 + SHRQ $0x02, R14 + ADDQ R13, R8 + ADCQ R14, R9 + ADCQ $0x00, R10 + SUBQ $0x10, R15 + CMPQ R15, $0x10 + JAE loop + +bytes_between_0_and_15: + TESTQ R15, R15 + JZ done + MOVQ $0x00000001, BX + XORQ CX, CX + XORQ R13, R13 + ADDQ R15, SI + +flush_buffer: + SHLQ $0x08, BX, CX + SHLQ $0x08, BX + MOVB -1(SI), R13 + XORQ R13, BX + DECQ SI + DECQ R15 + JNZ flush_buffer + ADDQ BX, R8 + ADCQ CX, R9 + ADCQ $0x00, R10 + MOVQ $0x00000010, R15 + JMP multiply + +done: + MOVQ R8, (DI) + MOVQ R9, 8(DI) + MOVQ R10, 16(DI) + RET diff --git a/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_asm.go b/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_asm.go new file mode 100644 index 0000000..315b84a --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_asm.go @@ -0,0 +1,47 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build gc && !purego && (amd64 || loong64 || ppc64 || ppc64le) + +package poly1305 + +//go:noescape +func update(state *macState, msg []byte) + +// mac is a wrapper for macGeneric that redirects calls that would have gone to +// updateGeneric to update. +// +// Its Write and Sum methods are otherwise identical to the macGeneric ones, but +// using function pointers would carry a major performance cost. +type mac struct{ macGeneric } + +func (h *mac) Write(p []byte) (int, error) { + nn := len(p) + if h.offset > 0 { + n := copy(h.buffer[h.offset:], p) + if h.offset+n < TagSize { + h.offset += n + return nn, nil + } + p = p[n:] + h.offset = 0 + update(&h.macState, h.buffer[:]) + } + if n := len(p) - (len(p) % TagSize); n > 0 { + update(&h.macState, p[:n]) + p = p[n:] + } + if len(p) > 0 { + h.offset += copy(h.buffer[h.offset:], p) + } + return nn, nil +} + +func (h *mac) Sum(out *[16]byte) { + state := h.macState + if h.offset > 0 { + update(&state, h.buffer[:h.offset]) + } + finalize(out, &state.h, &state.s) +} diff --git a/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_generic.go b/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_generic.go new file mode 100644 index 0000000..ec2202b --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_generic.go @@ -0,0 +1,312 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file provides the generic implementation of Sum and MAC. Other files +// might provide optimized assembly implementations of some of this code. + +package poly1305 + +import ( + "encoding/binary" + "math/bits" +) + +// Poly1305 [RFC 7539] is a relatively simple algorithm: the authentication tag +// for a 64 bytes message is approximately +// +// s + m[0:16] * r⁴ + m[16:32] * r³ + m[32:48] * r² + m[48:64] * r mod 2¹³⁰ - 5 +// +// for some secret r and s. It can be computed sequentially like +// +// for len(msg) > 0: +// h += read(msg, 16) +// h *= r +// h %= 2¹³⁰ - 5 +// return h + s +// +// All the complexity is about doing performant constant-time math on numbers +// larger than any available numeric type. + +func sumGeneric(out *[TagSize]byte, msg []byte, key *[32]byte) { + h := newMACGeneric(key) + h.Write(msg) + h.Sum(out) +} + +func newMACGeneric(key *[32]byte) macGeneric { + m := macGeneric{} + initialize(key, &m.macState) + return m +} + +// macState holds numbers in saturated 64-bit little-endian limbs. That is, +// the value of [x0, x1, x2] is x[0] + x[1] * 2⁶⁴ + x[2] * 2¹²⁸. +type macState struct { + // h is the main accumulator. It is to be interpreted modulo 2¹³⁰ - 5, but + // can grow larger during and after rounds. It must, however, remain below + // 2 * (2¹³⁰ - 5). + h [3]uint64 + // r and s are the private key components. + r [2]uint64 + s [2]uint64 +} + +type macGeneric struct { + macState + + buffer [TagSize]byte + offset int +} + +// Write splits the incoming message into TagSize chunks, and passes them to +// update. It buffers incomplete chunks. +func (h *macGeneric) Write(p []byte) (int, error) { + nn := len(p) + if h.offset > 0 { + n := copy(h.buffer[h.offset:], p) + if h.offset+n < TagSize { + h.offset += n + return nn, nil + } + p = p[n:] + h.offset = 0 + updateGeneric(&h.macState, h.buffer[:]) + } + if n := len(p) - (len(p) % TagSize); n > 0 { + updateGeneric(&h.macState, p[:n]) + p = p[n:] + } + if len(p) > 0 { + h.offset += copy(h.buffer[h.offset:], p) + } + return nn, nil +} + +// Sum flushes the last incomplete chunk from the buffer, if any, and generates +// the MAC output. It does not modify its state, in order to allow for multiple +// calls to Sum, even if no Write is allowed after Sum. +func (h *macGeneric) Sum(out *[TagSize]byte) { + state := h.macState + if h.offset > 0 { + updateGeneric(&state, h.buffer[:h.offset]) + } + finalize(out, &state.h, &state.s) +} + +// [rMask0, rMask1] is the specified Poly1305 clamping mask in little-endian. It +// clears some bits of the secret coefficient to make it possible to implement +// multiplication more efficiently. +const ( + rMask0 = 0x0FFFFFFC0FFFFFFF + rMask1 = 0x0FFFFFFC0FFFFFFC +) + +// initialize loads the 256-bit key into the two 128-bit secret values r and s. +func initialize(key *[32]byte, m *macState) { + m.r[0] = binary.LittleEndian.Uint64(key[0:8]) & rMask0 + m.r[1] = binary.LittleEndian.Uint64(key[8:16]) & rMask1 + m.s[0] = binary.LittleEndian.Uint64(key[16:24]) + m.s[1] = binary.LittleEndian.Uint64(key[24:32]) +} + +// uint128 holds a 128-bit number as two 64-bit limbs, for use with the +// bits.Mul64 and bits.Add64 intrinsics. +type uint128 struct { + lo, hi uint64 +} + +func mul64(a, b uint64) uint128 { + hi, lo := bits.Mul64(a, b) + return uint128{lo, hi} +} + +func add128(a, b uint128) uint128 { + lo, c := bits.Add64(a.lo, b.lo, 0) + hi, c := bits.Add64(a.hi, b.hi, c) + if c != 0 { + panic("poly1305: unexpected overflow") + } + return uint128{lo, hi} +} + +func shiftRightBy2(a uint128) uint128 { + a.lo = a.lo>>2 | (a.hi&3)<<62 + a.hi = a.hi >> 2 + return a +} + +// updateGeneric absorbs msg into the state.h accumulator. For each chunk m of +// 128 bits of message, it computes +// +// h₊ = (h + m) * r mod 2¹³⁰ - 5 +// +// If the msg length is not a multiple of TagSize, it assumes the last +// incomplete chunk is the final one. +func updateGeneric(state *macState, msg []byte) { + h0, h1, h2 := state.h[0], state.h[1], state.h[2] + r0, r1 := state.r[0], state.r[1] + + for len(msg) > 0 { + var c uint64 + + // For the first step, h + m, we use a chain of bits.Add64 intrinsics. + // The resulting value of h might exceed 2¹³⁰ - 5, but will be partially + // reduced at the end of the multiplication below. + // + // The spec requires us to set a bit just above the message size, not to + // hide leading zeroes. For full chunks, that's 1 << 128, so we can just + // add 1 to the most significant (2¹²⁸) limb, h2. + if len(msg) >= TagSize { + h0, c = bits.Add64(h0, binary.LittleEndian.Uint64(msg[0:8]), 0) + h1, c = bits.Add64(h1, binary.LittleEndian.Uint64(msg[8:16]), c) + h2 += c + 1 + + msg = msg[TagSize:] + } else { + var buf [TagSize]byte + copy(buf[:], msg) + buf[len(msg)] = 1 + + h0, c = bits.Add64(h0, binary.LittleEndian.Uint64(buf[0:8]), 0) + h1, c = bits.Add64(h1, binary.LittleEndian.Uint64(buf[8:16]), c) + h2 += c + + msg = nil + } + + // Multiplication of big number limbs is similar to elementary school + // columnar multiplication. Instead of digits, there are 64-bit limbs. + // + // We are multiplying a 3 limbs number, h, by a 2 limbs number, r. + // + // h2 h1 h0 x + // r1 r0 = + // ---------------- + // h2r0 h1r0 h0r0 <-- individual 128-bit products + // + h2r1 h1r1 h0r1 + // ------------------------ + // m3 m2 m1 m0 <-- result in 128-bit overlapping limbs + // ------------------------ + // m3.hi m2.hi m1.hi m0.hi <-- carry propagation + // + m3.lo m2.lo m1.lo m0.lo + // ------------------------------- + // t4 t3 t2 t1 t0 <-- final result in 64-bit limbs + // + // The main difference from pen-and-paper multiplication is that we do + // carry propagation in a separate step, as if we wrote two digit sums + // at first (the 128-bit limbs), and then carried the tens all at once. + + h0r0 := mul64(h0, r0) + h1r0 := mul64(h1, r0) + h2r0 := mul64(h2, r0) + h0r1 := mul64(h0, r1) + h1r1 := mul64(h1, r1) + h2r1 := mul64(h2, r1) + + // Since h2 is known to be at most 7 (5 + 1 + 1), and r0 and r1 have their + // top 4 bits cleared by rMask{0,1}, we know that their product is not going + // to overflow 64 bits, so we can ignore the high part of the products. + // + // This also means that the product doesn't have a fifth limb (t4). + if h2r0.hi != 0 { + panic("poly1305: unexpected overflow") + } + if h2r1.hi != 0 { + panic("poly1305: unexpected overflow") + } + + m0 := h0r0 + m1 := add128(h1r0, h0r1) // These two additions don't overflow thanks again + m2 := add128(h2r0, h1r1) // to the 4 masked bits at the top of r0 and r1. + m3 := h2r1 + + t0 := m0.lo + t1, c := bits.Add64(m1.lo, m0.hi, 0) + t2, c := bits.Add64(m2.lo, m1.hi, c) + t3, _ := bits.Add64(m3.lo, m2.hi, c) + + // Now we have the result as 4 64-bit limbs, and we need to reduce it + // modulo 2¹³⁰ - 5. The special shape of this Crandall prime lets us do + // a cheap partial reduction according to the reduction identity + // + // c * 2¹³⁰ + n = c * 5 + n mod 2¹³⁰ - 5 + // + // because 2¹³⁰ = 5 mod 2¹³⁰ - 5. Partial reduction since the result is + // likely to be larger than 2¹³⁰ - 5, but still small enough to fit the + // assumptions we make about h in the rest of the code. + // + // See also https://speakerdeck.com/gtank/engineering-prime-numbers?slide=23 + + // We split the final result at the 2¹³⁰ mark into h and cc, the carry. + // Note that the carry bits are effectively shifted left by 2, in other + // words, cc = c * 4 for the c in the reduction identity. + h0, h1, h2 = t0, t1, t2&maskLow2Bits + cc := uint128{t2 & maskNotLow2Bits, t3} + + // To add c * 5 to h, we first add cc = c * 4, and then add (cc >> 2) = c. + + h0, c = bits.Add64(h0, cc.lo, 0) + h1, c = bits.Add64(h1, cc.hi, c) + h2 += c + + cc = shiftRightBy2(cc) + + h0, c = bits.Add64(h0, cc.lo, 0) + h1, c = bits.Add64(h1, cc.hi, c) + h2 += c + + // h2 is at most 3 + 1 + 1 = 5, making the whole of h at most + // + // 5 * 2¹²⁸ + (2¹²⁸ - 1) = 6 * 2¹²⁸ - 1 + } + + state.h[0], state.h[1], state.h[2] = h0, h1, h2 +} + +const ( + maskLow2Bits uint64 = 0x0000000000000003 + maskNotLow2Bits uint64 = ^maskLow2Bits +) + +// select64 returns x if v == 1 and y if v == 0, in constant time. +func select64(v, x, y uint64) uint64 { return ^(v-1)&x | (v-1)&y } + +// [p0, p1, p2] is 2¹³⁰ - 5 in little endian order. +const ( + p0 = 0xFFFFFFFFFFFFFFFB + p1 = 0xFFFFFFFFFFFFFFFF + p2 = 0x0000000000000003 +) + +// finalize completes the modular reduction of h and computes +// +// out = h + s mod 2¹²⁸ +func finalize(out *[TagSize]byte, h *[3]uint64, s *[2]uint64) { + h0, h1, h2 := h[0], h[1], h[2] + + // After the partial reduction in updateGeneric, h might be more than + // 2¹³⁰ - 5, but will be less than 2 * (2¹³⁰ - 5). To complete the reduction + // in constant time, we compute t = h - (2¹³⁰ - 5), and select h as the + // result if the subtraction underflows, and t otherwise. + + hMinusP0, b := bits.Sub64(h0, p0, 0) + hMinusP1, b := bits.Sub64(h1, p1, b) + _, b = bits.Sub64(h2, p2, b) + + // h = h if h < p else h - p + h0 = select64(b, h0, hMinusP0) + h1 = select64(b, h1, hMinusP1) + + // Finally, we compute the last Poly1305 step + // + // tag = h + s mod 2¹²⁸ + // + // by just doing a wide addition with the 128 low bits of h and discarding + // the overflow. + h0, c := bits.Add64(h0, s[0], 0) + h1, _ = bits.Add64(h1, s[1], c) + + binary.LittleEndian.PutUint64(out[0:8], h0) + binary.LittleEndian.PutUint64(out[8:16], h1) +} diff --git a/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_loong64.s b/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_loong64.s new file mode 100644 index 0000000..bc8361d --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_loong64.s @@ -0,0 +1,123 @@ +// Copyright 2025 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build gc && !purego + +// func update(state *macState, msg []byte) +TEXT ·update(SB), $0-32 + MOVV state+0(FP), R4 + MOVV msg_base+8(FP), R5 + MOVV msg_len+16(FP), R6 + + MOVV $0x10, R7 + + MOVV (R4), R8 // h0 + MOVV 8(R4), R9 // h1 + MOVV 16(R4), R10 // h2 + MOVV 24(R4), R11 // r0 + MOVV 32(R4), R12 // r1 + + BLT R6, R7, bytes_between_0_and_15 + +loop: + MOVV (R5), R14 // msg[0:8] + MOVV 8(R5), R16 // msg[8:16] + ADDV R14, R8, R8 // h0 (x1 + y1 = z1', if z1' < x1 then z1' overflow) + ADDV R16, R9, R27 + SGTU R14, R8, R24 // h0.carry + SGTU R9, R27, R28 + ADDV R27, R24, R9 // h1 + SGTU R27, R9, R24 + OR R24, R28, R24 // h1.carry + ADDV $0x01, R24, R24 + ADDV R10, R24, R10 // h2 + + ADDV $16, R5, R5 // msg = msg[16:] + +multiply: + MULV R8, R11, R14 // h0r0.lo + MULHVU R8, R11, R15 // h0r0.hi + MULV R9, R11, R13 // h1r0.lo + MULHVU R9, R11, R16 // h1r0.hi + ADDV R13, R15, R15 + SGTU R13, R15, R24 + ADDV R24, R16, R16 + MULV R10, R11, R25 + ADDV R16, R25, R25 + MULV R8, R12, R13 // h0r1.lo + MULHVU R8, R12, R16 // h0r1.hi + ADDV R13, R15, R15 + SGTU R13, R15, R24 + ADDV R24, R16, R16 + MOVV R16, R8 + MULV R10, R12, R26 // h2r1 + MULV R9, R12, R13 // h1r1.lo + MULHVU R9, R12, R16 // h1r1.hi + ADDV R13, R25, R25 + ADDV R16, R26, R27 + SGTU R13, R25, R24 + ADDV R27, R24, R26 + ADDV R8, R25, R25 + SGTU R8, R25, R24 + ADDV R24, R26, R26 + AND $3, R25, R10 + AND $-4, R25, R17 + ADDV R17, R14, R8 + ADDV R26, R15, R27 + SGTU R17, R8, R24 + SGTU R26, R27, R28 + ADDV R27, R24, R9 + SGTU R27, R9, R24 + OR R24, R28, R24 + ADDV R24, R10, R10 + SLLV $62, R26, R27 + SRLV $2, R25, R28 + SRLV $2, R26, R26 + OR R27, R28, R25 + ADDV R25, R8, R8 + ADDV R26, R9, R27 + SGTU R25, R8, R24 + SGTU R26, R27, R28 + ADDV R27, R24, R9 + SGTU R27, R9, R24 + OR R24, R28, R24 + ADDV R24, R10, R10 + + SUBV $16, R6, R6 + BGE R6, R7, loop + +bytes_between_0_and_15: + BEQ R6, R0, done + MOVV $1, R14 + XOR R15, R15 + ADDV R6, R5, R5 + +flush_buffer: + MOVBU -1(R5), R25 + SRLV $56, R14, R24 + SLLV $8, R15, R28 + SLLV $8, R14, R14 + OR R24, R28, R15 + XOR R25, R14, R14 + SUBV $1, R6, R6 + SUBV $1, R5, R5 + BNE R6, R0, flush_buffer + + ADDV R14, R8, R8 + SGTU R14, R8, R24 + ADDV R15, R9, R27 + SGTU R15, R27, R28 + ADDV R27, R24, R9 + SGTU R27, R9, R24 + OR R24, R28, R24 + ADDV R10, R24, R10 + + MOVV $16, R6 + JMP multiply + +done: + MOVV R8, (R4) + MOVV R9, 8(R4) + MOVV R10, 16(R4) + RET diff --git a/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_ppc64x.s b/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_ppc64x.s new file mode 100644 index 0000000..6899a1d --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_ppc64x.s @@ -0,0 +1,187 @@ +// Copyright 2019 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build gc && !purego && (ppc64 || ppc64le) + +#include "textflag.h" + +// This was ported from the amd64 implementation. + +#ifdef GOARCH_ppc64le +#define LE_MOVD MOVD +#define LE_MOVWZ MOVWZ +#define LE_MOVHZ MOVHZ +#else +#define LE_MOVD MOVDBR +#define LE_MOVWZ MOVWBR +#define LE_MOVHZ MOVHBR +#endif + +#define POLY1305_ADD(msg, h0, h1, h2, t0, t1, t2) \ + LE_MOVD (msg)( R0), t0; \ + LE_MOVD (msg)(R24), t1; \ + MOVD $1, t2; \ + ADDC t0, h0, h0; \ + ADDE t1, h1, h1; \ + ADDE t2, h2; \ + ADD $16, msg + +#define POLY1305_MUL(h0, h1, h2, r0, r1, t0, t1, t2, t3, t4, t5) \ + MULLD r0, h0, t0; \ + MULHDU r0, h0, t1; \ + MULLD r0, h1, t4; \ + MULHDU r0, h1, t5; \ + ADDC t4, t1, t1; \ + MULLD r0, h2, t2; \ + MULHDU r1, h0, t4; \ + MULLD r1, h0, h0; \ + ADDE t5, t2, t2; \ + ADDC h0, t1, t1; \ + MULLD h2, r1, t3; \ + ADDZE t4, h0; \ + MULHDU r1, h1, t5; \ + MULLD r1, h1, t4; \ + ADDC t4, t2, t2; \ + ADDE t5, t3, t3; \ + ADDC h0, t2, t2; \ + MOVD $-4, t4; \ + ADDZE t3; \ + RLDICL $0, t2, $62, h2; \ + AND t2, t4, h0; \ + ADDC t0, h0, h0; \ + ADDE t3, t1, h1; \ + SLD $62, t3, t4; \ + SRD $2, t2; \ + ADDZE h2; \ + OR t4, t2, t2; \ + SRD $2, t3; \ + ADDC t2, h0, h0; \ + ADDE t3, h1, h1; \ + ADDZE h2 + +// func update(state *[7]uint64, msg []byte) +TEXT ·update(SB), $0-32 + MOVD state+0(FP), R3 + MOVD msg_base+8(FP), R4 + MOVD msg_len+16(FP), R5 + + MOVD 0(R3), R8 // h0 + MOVD 8(R3), R9 // h1 + MOVD 16(R3), R10 // h2 + MOVD 24(R3), R11 // r0 + MOVD 32(R3), R12 // r1 + + MOVD $8, R24 + + CMP R5, $16 + BLT bytes_between_0_and_15 + +loop: + POLY1305_ADD(R4, R8, R9, R10, R20, R21, R22) + + PCALIGN $16 +multiply: + POLY1305_MUL(R8, R9, R10, R11, R12, R16, R17, R18, R14, R20, R21) + ADD $-16, R5 + CMP R5, $16 + BGE loop + +bytes_between_0_and_15: + CMP R5, $0 + BEQ done + MOVD $0, R16 // h0 + MOVD $0, R17 // h1 + +flush_buffer: + CMP R5, $8 + BLE just1 + + MOVD $8, R21 + SUB R21, R5, R21 + + // Greater than 8 -- load the rightmost remaining bytes in msg + // and put into R17 (h1) + LE_MOVD (R4)(R21), R17 + MOVD $16, R22 + + // Find the offset to those bytes + SUB R5, R22, R22 + SLD $3, R22 + + // Shift to get only the bytes in msg + SRD R22, R17, R17 + + // Put 1 at high end + MOVD $1, R23 + SLD $3, R21 + SLD R21, R23, R23 + OR R23, R17, R17 + + // Remainder is 8 + MOVD $8, R5 + +just1: + CMP R5, $8 + BLT less8 + + // Exactly 8 + LE_MOVD (R4), R16 + + CMP R17, $0 + + // Check if we've already set R17; if not + // set 1 to indicate end of msg. + BNE carry + MOVD $1, R17 + BR carry + +less8: + MOVD $0, R16 // h0 + MOVD $0, R22 // shift count + CMP R5, $4 + BLT less4 + LE_MOVWZ (R4), R16 + ADD $4, R4 + ADD $-4, R5 + MOVD $32, R22 + +less4: + CMP R5, $2 + BLT less2 + LE_MOVHZ (R4), R21 + SLD R22, R21, R21 + OR R16, R21, R16 + ADD $16, R22 + ADD $-2, R5 + ADD $2, R4 + +less2: + CMP R5, $0 + BEQ insert1 + MOVBZ (R4), R21 + SLD R22, R21, R21 + OR R16, R21, R16 + ADD $8, R22 + +insert1: + // Insert 1 at end of msg + MOVD $1, R21 + SLD R22, R21, R21 + OR R16, R21, R16 + +carry: + // Add new values to h0, h1, h2 + ADDC R16, R8 + ADDE R17, R9 + ADDZE R10, R10 + MOVD $16, R5 + ADD R5, R4 + BR multiply + +done: + // Save h0, h1, h2 in state + MOVD R8, 0(R3) + MOVD R9, 8(R3) + MOVD R10, 16(R3) + RET diff --git a/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_s390x.go b/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_s390x.go new file mode 100644 index 0000000..e1d033a --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_s390x.go @@ -0,0 +1,76 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build gc && !purego + +package poly1305 + +import ( + "golang.org/x/sys/cpu" +) + +// updateVX is an assembly implementation of Poly1305 that uses vector +// instructions. It must only be called if the vector facility (vx) is +// available. +// +//go:noescape +func updateVX(state *macState, msg []byte) + +// mac is a replacement for macGeneric that uses a larger buffer and redirects +// calls that would have gone to updateGeneric to updateVX if the vector +// facility is installed. +// +// A larger buffer is required for good performance because the vector +// implementation has a higher fixed cost per call than the generic +// implementation. +type mac struct { + macState + + buffer [16 * TagSize]byte // size must be a multiple of block size (16) + offset int +} + +func (h *mac) Write(p []byte) (int, error) { + nn := len(p) + if h.offset > 0 { + n := copy(h.buffer[h.offset:], p) + if h.offset+n < len(h.buffer) { + h.offset += n + return nn, nil + } + p = p[n:] + h.offset = 0 + if cpu.S390X.HasVX { + updateVX(&h.macState, h.buffer[:]) + } else { + updateGeneric(&h.macState, h.buffer[:]) + } + } + + tail := len(p) % len(h.buffer) // number of bytes to copy into buffer + body := len(p) - tail // number of bytes to process now + if body > 0 { + if cpu.S390X.HasVX { + updateVX(&h.macState, p[:body]) + } else { + updateGeneric(&h.macState, p[:body]) + } + } + h.offset = copy(h.buffer[:], p[body:]) // copy tail bytes - can be 0 + return nn, nil +} + +func (h *mac) Sum(out *[TagSize]byte) { + state := h.macState + remainder := h.buffer[:h.offset] + + // Use the generic implementation if we have 2 or fewer blocks left + // to sum. The vector implementation has a higher startup time. + if cpu.S390X.HasVX && len(remainder) > 2*TagSize { + updateVX(&state, remainder) + } else if len(remainder) > 0 { + updateGeneric(&state, remainder) + } + finalize(out, &state.h, &state.s) +} diff --git a/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_s390x.s b/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_s390x.s new file mode 100644 index 0000000..0fe3a7c --- /dev/null +++ b/backend/vendor/golang.org/x/crypto/internal/poly1305/sum_s390x.s @@ -0,0 +1,503 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build gc && !purego + +#include "textflag.h" + +// This implementation of Poly1305 uses the vector facility (vx) +// to process up to 2 blocks (32 bytes) per iteration using an +// algorithm based on the one described in: +// +// NEON crypto, Daniel J. Bernstein & Peter Schwabe +// https://cryptojedi.org/papers/neoncrypto-20120320.pdf +// +// This algorithm uses 5 26-bit limbs to represent a 130-bit +// value. These limbs are, for the most part, zero extended and +// placed into 64-bit vector register elements. Each vector +// register is 128-bits wide and so holds 2 of these elements. +// Using 26-bit limbs allows us plenty of headroom to accommodate +// accumulations before and after multiplication without +// overflowing either 32-bits (before multiplication) or 64-bits +// (after multiplication). +// +// In order to parallelise the operations required to calculate +// the sum we use two separate accumulators and then sum those +// in an extra final step. For compatibility with the generic +// implementation we perform this summation at the end of every +// updateVX call. +// +// To use two accumulators we must multiply the message blocks +// by r² rather than r. Only the final message block should be +// multiplied by r. +// +// Example: +// +// We want to calculate the sum (h) for a 64 byte message (m): +// +// h = m[0:16]r⁴ + m[16:32]r³ + m[32:48]r² + m[48:64]r +// +// To do this we split the calculation into the even indices +// and odd indices of the message. These form our SIMD 'lanes': +// +// h = m[ 0:16]r⁴ + m[32:48]r² + <- lane 0 +// m[16:32]r³ + m[48:64]r <- lane 1 +// +// To calculate this iteratively we refactor so that both lanes +// are written in terms of r² and r: +// +// h = (m[ 0:16]r² + m[32:48])r² + <- lane 0 +// (m[16:32]r² + m[48:64])r <- lane 1 +// ^ ^ +// | coefficients for second iteration +// coefficients for first iteration +// +// So in this case we would have two iterations. In the first +// both lanes are multiplied by r². In the second only the +// first lane is multiplied by r² and the second lane is +// instead multiplied by r. This gives use the odd and even +// powers of r that we need from the original equation. +// +// Notation: +// +// h - accumulator +// r - key +// m - message +// +// [a, b] - SIMD register holding two 64-bit values +// [a, b, c, d] - SIMD register holding four 32-bit values +// xᵢ[n] - limb n of variable x with bit width i +// +// Limbs are expressed in little endian order, so for 26-bit +// limbs x₂₆[4] will be the most significant limb and x₂₆[0] +// will be the least significant limb. + +// masking constants +#define MOD24 V0 // [0x0000000000ffffff, 0x0000000000ffffff] - mask low 24-bits +#define MOD26 V1 // [0x0000000003ffffff, 0x0000000003ffffff] - mask low 26-bits + +// expansion constants (see EXPAND macro) +#define EX0 V2 +#define EX1 V3 +#define EX2 V4 + +// key (r², r or 1 depending on context) +#define R_0 V5 +#define R_1 V6 +#define R_2 V7 +#define R_3 V8 +#define R_4 V9 + +// precalculated coefficients (5r², 5r or 0 depending on context) +#define R5_1 V10 +#define R5_2 V11 +#define R5_3 V12 +#define R5_4 V13 + +// message block (m) +#define M_0 V14 +#define M_1 V15 +#define M_2 V16 +#define M_3 V17 +#define M_4 V18 + +// accumulator (h) +#define H_0 V19 +#define H_1 V20 +#define H_2 V21 +#define H_3 V22 +#define H_4 V23 + +// temporary registers (for short-lived values) +#define T_0 V24 +#define T_1 V25 +#define T_2 V26 +#define T_3 V27 +#define T_4 V28 + +GLOBL ·constants<>(SB), RODATA, $0x30 +// EX0 +DATA ·constants<>+0x00(SB)/8, $0x0006050403020100 +DATA ·constants<>+0x08(SB)/8, $0x1016151413121110 +// EX1 +DATA ·constants<>+0x10(SB)/8, $0x060c0b0a09080706 +DATA ·constants<>+0x18(SB)/8, $0x161c1b1a19181716 +// EX2 +DATA ·constants<>+0x20(SB)/8, $0x0d0d0d0d0d0f0e0d +DATA ·constants<>+0x28(SB)/8, $0x1d1d1d1d1d1f1e1d + +// MULTIPLY multiplies each lane of f and g, partially reduced +// modulo 2¹³⁰ - 5. The result, h, consists of partial products +// in each lane that need to be reduced further to produce the +// final result. +// +// h₁₃₀ = (f₁₃₀g₁₃₀) % 2¹³⁰ + (5f₁₃₀g₁₃₀) / 2¹³⁰ +// +// Note that the multiplication by 5 of the high bits is +// achieved by precalculating the multiplication of four of the +// g coefficients by 5. These are g51-g54. +#define MULTIPLY(f0, f1, f2, f3, f4, g0, g1, g2, g3, g4, g51, g52, g53, g54, h0, h1, h2, h3, h4) \ + VMLOF f0, g0, h0 \ + VMLOF f0, g3, h3 \ + VMLOF f0, g1, h1 \ + VMLOF f0, g4, h4 \ + VMLOF f0, g2, h2 \ + VMLOF f1, g54, T_0 \ + VMLOF f1, g2, T_3 \ + VMLOF f1, g0, T_1 \ + VMLOF f1, g3, T_4 \ + VMLOF f1, g1, T_2 \ + VMALOF f2, g53, h0, h0 \ + VMALOF f2, g1, h3, h3 \ + VMALOF f2, g54, h1, h1 \ + VMALOF f2, g2, h4, h4 \ + VMALOF f2, g0, h2, h2 \ + VMALOF f3, g52, T_0, T_0 \ + VMALOF f3, g0, T_3, T_3 \ + VMALOF f3, g53, T_1, T_1 \ + VMALOF f3, g1, T_4, T_4 \ + VMALOF f3, g54, T_2, T_2 \ + VMALOF f4, g51, h0, h0 \ + VMALOF f4, g54, h3, h3 \ + VMALOF f4, g52, h1, h1 \ + VMALOF f4, g0, h4, h4 \ + VMALOF f4, g53, h2, h2 \ + VAG T_0, h0, h0 \ + VAG T_3, h3, h3 \ + VAG T_1, h1, h1 \ + VAG T_4, h4, h4 \ + VAG T_2, h2, h2 + +// REDUCE performs the following carry operations in four +// stages, as specified in Bernstein & Schwabe: +// +// 1: h₂₆[0]->h₂₆[1] h₂₆[3]->h₂₆[4] +// 2: h₂₆[1]->h₂₆[2] h₂₆[4]->h₂₆[0] +// 3: h₂₆[0]->h₂₆[1] h₂₆[2]->h₂₆[3] +// 4: h₂₆[3]->h₂₆[4] +// +// The result is that all of the limbs are limited to 26-bits +// except for h₂₆[1] and h₂₆[4] which are limited to 27-bits. +// +// Note that although each limb is aligned at 26-bit intervals +// they may contain values that exceed 2²⁶ - 1, hence the need +// to carry the excess bits in each limb. +#define REDUCE(h0, h1, h2, h3, h4) \ + VESRLG $26, h0, T_0 \ + VESRLG $26, h3, T_1 \ + VN MOD26, h0, h0 \ + VN MOD26, h3, h3 \ + VAG T_0, h1, h1 \ + VAG T_1, h4, h4 \ + VESRLG $26, h1, T_2 \ + VESRLG $26, h4, T_3 \ + VN MOD26, h1, h1 \ + VN MOD26, h4, h4 \ + VESLG $2, T_3, T_4 \ + VAG T_3, T_4, T_4 \ + VAG T_2, h2, h2 \ + VAG T_4, h0, h0 \ + VESRLG $26, h2, T_0 \ + VESRLG $26, h0, T_1 \ + VN MOD26, h2, h2 \ + VN MOD26, h0, h0 \ + VAG T_0, h3, h3 \ + VAG T_1, h1, h1 \ + VESRLG $26, h3, T_2 \ + VN MOD26, h3, h3 \ + VAG T_2, h4, h4 + +// EXPAND splits the 128-bit little-endian values in0 and in1 +// into 26-bit big-endian limbs and places the results into +// the first and second lane of d₂₆[0:4] respectively. +// +// The EX0, EX1 and EX2 constants are arrays of byte indices +// for permutation. The permutation both reverses the bytes +// in the input and ensures the bytes are copied into the +// destination limb ready to be shifted into their final +// position. +#define EXPAND(in0, in1, d0, d1, d2, d3, d4) \ + VPERM in0, in1, EX0, d0 \ + VPERM in0, in1, EX1, d2 \ + VPERM in0, in1, EX2, d4 \ + VESRLG $26, d0, d1 \ + VESRLG $30, d2, d3 \ + VESRLG $4, d2, d2 \ + VN MOD26, d0, d0 \ // [in0₂₆[0], in1₂₆[0]] + VN MOD26, d3, d3 \ // [in0₂₆[3], in1₂₆[3]] + VN MOD26, d1, d1 \ // [in0₂₆[1], in1₂₆[1]] + VN MOD24, d4, d4 \ // [in0₂₆[4], in1₂₆[4]] + VN MOD26, d2, d2 // [in0₂₆[2], in1₂₆[2]] + +// func updateVX(state *macState, msg []byte) +TEXT ·updateVX(SB), NOSPLIT, $0 + MOVD state+0(FP), R1 + LMG msg+8(FP), R2, R3 // R2=msg_base, R3=msg_len + + // load EX0, EX1 and EX2 + MOVD $·constants<>(SB), R5 + VLM (R5), EX0, EX2 + + // generate masks + VGMG $(64-24), $63, MOD24 // [0x00ffffff, 0x00ffffff] + VGMG $(64-26), $63, MOD26 // [0x03ffffff, 0x03ffffff] + + // load h (accumulator) and r (key) from state + VZERO T_1 // [0, 0] + VL 0(R1), T_0 // [h₆₄[0], h₆₄[1]] + VLEG $0, 16(R1), T_1 // [h₆₄[2], 0] + VL 24(R1), T_2 // [r₆₄[0], r₆₄[1]] + VPDI $0, T_0, T_2, T_3 // [h₆₄[0], r₆₄[0]] + VPDI $5, T_0, T_2, T_4 // [h₆₄[1], r₆₄[1]] + + // unpack h and r into 26-bit limbs + // note: h₆₄[2] may have the low 3 bits set, so h₂₆[4] is a 27-bit value + VN MOD26, T_3, H_0 // [h₂₆[0], r₂₆[0]] + VZERO H_1 // [0, 0] + VZERO H_3 // [0, 0] + VGMG $(64-12-14), $(63-12), T_0 // [0x03fff000, 0x03fff000] - 26-bit mask with low 12 bits masked out + VESLG $24, T_1, T_1 // [h₆₄[2]<<24, 0] + VERIMG $-26&63, T_3, MOD26, H_1 // [h₂₆[1], r₂₆[1]] + VESRLG $+52&63, T_3, H_2 // [h₂₆[2], r₂₆[2]] - low 12 bits only + VERIMG $-14&63, T_4, MOD26, H_3 // [h₂₆[1], r₂₆[1]] + VESRLG $40, T_4, H_4 // [h₂₆[4], r₂₆[4]] - low 24 bits only + VERIMG $+12&63, T_4, T_0, H_2 // [h₂₆[2], r₂₆[2]] - complete + VO T_1, H_4, H_4 // [h₂₆[4], r₂₆[4]] - complete + + // replicate r across all 4 vector elements + VREPF $3, H_0, R_0 // [r₂₆[0], r₂₆[0], r₂₆[0], r₂₆[0]] + VREPF $3, H_1, R_1 // [r₂₆[1], r₂₆[1], r₂₆[1], r₂₆[1]] + VREPF $3, H_2, R_2 // [r₂₆[2], r₂₆[2], r₂₆[2], r₂₆[2]] + VREPF $3, H_3, R_3 // [r₂₆[3], r₂₆[3], r₂₆[3], r₂₆[3]] + VREPF $3, H_4, R_4 // [r₂₆[4], r₂₆[4], r₂₆[4], r₂₆[4]] + + // zero out lane 1 of h + VLEIG $1, $0, H_0 // [h₂₆[0], 0] + VLEIG $1, $0, H_1 // [h₂₆[1], 0] + VLEIG $1, $0, H_2 // [h₂₆[2], 0] + VLEIG $1, $0, H_3 // [h₂₆[3], 0] + VLEIG $1, $0, H_4 // [h₂₆[4], 0] + + // calculate 5r (ignore least significant limb) + VREPIF $5, T_0 + VMLF T_0, R_1, R5_1 // [5r₂₆[1], 5r₂₆[1], 5r₂₆[1], 5r₂₆[1]] + VMLF T_0, R_2, R5_2 // [5r₂₆[2], 5r₂₆[2], 5r₂₆[2], 5r₂₆[2]] + VMLF T_0, R_3, R5_3 // [5r₂₆[3], 5r₂₆[3], 5r₂₆[3], 5r₂₆[3]] + VMLF T_0, R_4, R5_4 // [5r₂₆[4], 5r₂₆[4], 5r₂₆[4], 5r₂₆[4]] + + // skip r² calculation if we are only calculating one block + CMPBLE R3, $16, skip + + // calculate r² + MULTIPLY(R_0, R_1, R_2, R_3, R_4, R_0, R_1, R_2, R_3, R_4, R5_1, R5_2, R5_3, R5_4, M_0, M_1, M_2, M_3, M_4) + REDUCE(M_0, M_1, M_2, M_3, M_4) + VGBM $0x0f0f, T_0 + VERIMG $0, M_0, T_0, R_0 // [r₂₆[0], r²₂₆[0], r₂₆[0], r²₂₆[0]] + VERIMG $0, M_1, T_0, R_1 // [r₂₆[1], r²₂₆[1], r₂₆[1], r²₂₆[1]] + VERIMG $0, M_2, T_0, R_2 // [r₂₆[2], r²₂₆[2], r₂₆[2], r²₂₆[2]] + VERIMG $0, M_3, T_0, R_3 // [r₂₆[3], r²₂₆[3], r₂₆[3], r²₂₆[3]] + VERIMG $0, M_4, T_0, R_4 // [r₂₆[4], r²₂₆[4], r₂₆[4], r²₂₆[4]] + + // calculate 5r² (ignore least significant limb) + VREPIF $5, T_0 + VMLF T_0, R_1, R5_1 // [5r₂₆[1], 5r²₂₆[1], 5r₂₆[1], 5r²₂₆[1]] + VMLF T_0, R_2, R5_2 // [5r₂₆[2], 5r²₂₆[2], 5r₂₆[2], 5r²₂₆[2]] + VMLF T_0, R_3, R5_3 // [5r₂₆[3], 5r²₂₆[3], 5r₂₆[3], 5r²₂₆[3]] + VMLF T_0, R_4, R5_4 // [5r₂₆[4], 5r²₂₆[4], 5r₂₆[4], 5r²₂₆[4]] + +loop: + CMPBLE R3, $32, b2 // 2 or fewer blocks remaining, need to change key coefficients + + // load next 2 blocks from message + VLM (R2), T_0, T_1 + + // update message slice + SUB $32, R3 + MOVD $32(R2), R2 + + // unpack message blocks into 26-bit big-endian limbs + EXPAND(T_0, T_1, M_0, M_1, M_2, M_3, M_4) + + // add 2¹²⁸ to each message block value + VLEIB $4, $1, M_4 + VLEIB $12, $1, M_4 + +multiply: + // accumulate the incoming message + VAG H_0, M_0, M_0 + VAG H_3, M_3, M_3 + VAG H_1, M_1, M_1 + VAG H_4, M_4, M_4 + VAG H_2, M_2, M_2 + + // multiply the accumulator by the key coefficient + MULTIPLY(M_0, M_1, M_2, M_3, M_4, R_0, R_1, R_2, R_3, R_4, R5_1, R5_2, R5_3, R5_4, H_0, H_1, H_2, H_3, H_4) + + // carry and partially reduce the partial products + REDUCE(H_0, H_1, H_2, H_3, H_4) + + CMPBNE R3, $0, loop + +finish: + // sum lane 0 and lane 1 and put the result in lane 1 + VZERO T_0 + VSUMQG H_0, T_0, H_0 + VSUMQG H_3, T_0, H_3 + VSUMQG H_1, T_0, H_1 + VSUMQG H_4, T_0, H_4 + VSUMQG H_2, T_0, H_2 + + // reduce again after summation + // TODO(mundaym): there might be a more efficient way to do this + // now that we only have 1 active lane. For example, we could + // simultaneously pack the values as we reduce them. + REDUCE(H_0, H_1, H_2, H_3, H_4) + + // carry h[1] through to h[4] so that only h[4] can exceed 2²⁶ - 1 + // TODO(mundaym): in testing this final carry was unnecessary. + // Needs a proof before it can be removed though. + VESRLG $26, H_1, T_1 + VN MOD26, H_1, H_1 + VAQ T_1, H_2, H_2 + VESRLG $26, H_2, T_2 + VN MOD26, H_2, H_2 + VAQ T_2, H_3, H_3 + VESRLG $26, H_3, T_3 + VN MOD26, H_3, H_3 + VAQ T_3, H_4, H_4 + + // h is now < 2(2¹³⁰ - 5) + // Pack each lane in h₂₆[0:4] into h₁₂₈[0:1]. + VESLG $26, H_1, H_1 + VESLG $26, H_3, H_3 + VO H_0, H_1, H_0 + VO H_2, H_3, H_2 + VESLG $4, H_2, H_2 + VLEIB $7, $48, H_1 + VSLB H_1, H_2, H_2 + VO H_0, H_2, H_0 + VLEIB $7, $104, H_1 + VSLB H_1, H_4, H_3 + VO H_3, H_0, H_0 + VLEIB $7, $24, H_1 + VSRLB H_1, H_4, H_1 + + // update state + VSTEG $1, H_0, 0(R1) + VSTEG $0, H_0, 8(R1) + VSTEG $1, H_1, 16(R1) + RET + +b2: // 2 or fewer blocks remaining + CMPBLE R3, $16, b1 + + // Load the 2 remaining blocks (17-32 bytes remaining). + MOVD $-17(R3), R0 // index of final byte to load modulo 16 + VL (R2), T_0 // load full 16 byte block + VLL R0, 16(R2), T_1 // load final (possibly partial) block and pad with zeros to 16 bytes + + // The Poly1305 algorithm requires that a 1 bit be appended to + // each message block. If the final block is less than 16 bytes + // long then it is easiest to insert the 1 before the message + // block is split into 26-bit limbs. If, on the other hand, the + // final message block is 16 bytes long then we append the 1 bit + // after expansion as normal. + MOVBZ $1, R0 + MOVD $-16(R3), R3 // index of byte in last block to insert 1 at (could be 16) + CMPBEQ R3, $16, 2(PC) // skip the insertion if the final block is 16 bytes long + VLVGB R3, R0, T_1 // insert 1 into the byte at index R3 + + // Split both blocks into 26-bit limbs in the appropriate lanes. + EXPAND(T_0, T_1, M_0, M_1, M_2, M_3, M_4) + + // Append a 1 byte to the end of the second to last block. + VLEIB $4, $1, M_4 + + // Append a 1 byte to the end of the last block only if it is a + // full 16 byte block. + CMPBNE R3, $16, 2(PC) + VLEIB $12, $1, M_4 + + // Finally, set up the coefficients for the final multiplication. + // We have previously saved r and 5r in the 32-bit even indexes + // of the R_[0-4] and R5_[1-4] coefficient registers. + // + // We want lane 0 to be multiplied by r² so that can be kept the + // same. We want lane 1 to be multiplied by r so we need to move + // the saved r value into the 32-bit odd index in lane 1 by + // rotating the 64-bit lane by 32. + VGBM $0x00ff, T_0 // [0, 0xffffffffffffffff] - mask lane 1 only + VERIMG $32, R_0, T_0, R_0 // [_, r²₂₆[0], _, r₂₆[0]] + VERIMG $32, R_1, T_0, R_1 // [_, r²₂₆[1], _, r₂₆[1]] + VERIMG $32, R_2, T_0, R_2 // [_, r²₂₆[2], _, r₂₆[2]] + VERIMG $32, R_3, T_0, R_3 // [_, r²₂₆[3], _, r₂₆[3]] + VERIMG $32, R_4, T_0, R_4 // [_, r²₂₆[4], _, r₂₆[4]] + VERIMG $32, R5_1, T_0, R5_1 // [_, 5r²₂₆[1], _, 5r₂₆[1]] + VERIMG $32, R5_2, T_0, R5_2 // [_, 5r²₂₆[2], _, 5r₂₆[2]] + VERIMG $32, R5_3, T_0, R5_3 // [_, 5r²₂₆[3], _, 5r₂₆[3]] + VERIMG $32, R5_4, T_0, R5_4 // [_, 5r²₂₆[4], _, 5r₂₆[4]] + + MOVD $0, R3 + BR multiply + +skip: + CMPBEQ R3, $0, finish + +b1: // 1 block remaining + + // Load the final block (1-16 bytes). This will be placed into + // lane 0. + MOVD $-1(R3), R0 + VLL R0, (R2), T_0 // pad to 16 bytes with zeros + + // The Poly1305 algorithm requires that a 1 bit be appended to + // each message block. If the final block is less than 16 bytes + // long then it is easiest to insert the 1 before the message + // block is split into 26-bit limbs. If, on the other hand, the + // final message block is 16 bytes long then we append the 1 bit + // after expansion as normal. + MOVBZ $1, R0 + CMPBEQ R3, $16, 2(PC) + VLVGB R3, R0, T_0 + + // Set the message block in lane 1 to the value 0 so that it + // can be accumulated without affecting the final result. + VZERO T_1 + + // Split the final message block into 26-bit limbs in lane 0. + // Lane 1 will be contain 0. + EXPAND(T_0, T_1, M_0, M_1, M_2, M_3, M_4) + + // Append a 1 byte to the end of the last block only if it is a + // full 16 byte block. + CMPBNE R3, $16, 2(PC) + VLEIB $4, $1, M_4 + + // We have previously saved r and 5r in the 32-bit even indexes + // of the R_[0-4] and R5_[1-4] coefficient registers. + // + // We want lane 0 to be multiplied by r so we need to move the + // saved r value into the 32-bit odd index in lane 0. We want + // lane 1 to be set to the value 1. This makes multiplication + // a no-op. We do this by setting lane 1 in every register to 0 + // and then just setting the 32-bit index 3 in R_0 to 1. + VZERO T_0 + MOVD $0, R0 + MOVD $0x10111213, R12 + VLVGP R12, R0, T_1 // [_, 0x10111213, _, 0x00000000] + VPERM T_0, R_0, T_1, R_0 // [_, r₂₆[0], _, 0] + VPERM T_0, R_1, T_1, R_1 // [_, r₂₆[1], _, 0] + VPERM T_0, R_2, T_1, R_2 // [_, r₂₆[2], _, 0] + VPERM T_0, R_3, T_1, R_3 // [_, r₂₆[3], _, 0] + VPERM T_0, R_4, T_1, R_4 // [_, r₂₆[4], _, 0] + VPERM T_0, R5_1, T_1, R5_1 // [_, 5r₂₆[1], _, 0] + VPERM T_0, R5_2, T_1, R5_2 // [_, 5r₂₆[2], _, 0] + VPERM T_0, R5_3, T_1, R5_3 // [_, 5r₂₆[3], _, 0] + VPERM T_0, R5_4, T_1, R5_4 // [_, 5r₂₆[4], _, 0] + + // Set the value of lane 1 to be 1. + VLEIF $3, $1, R_0 // [_, r₂₆[0], _, 1] + + MOVD $0, R3 + BR multiply diff --git a/backend/vendor/golang.org/x/exp/LICENSE b/backend/vendor/golang.org/x/exp/LICENSE new file mode 100644 index 0000000..2a7cf70 --- /dev/null +++ b/backend/vendor/golang.org/x/exp/LICENSE @@ -0,0 +1,27 @@ +Copyright 2009 The Go Authors. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google LLC nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/backend/vendor/golang.org/x/exp/PATENTS b/backend/vendor/golang.org/x/exp/PATENTS new file mode 100644 index 0000000..7330990 --- /dev/null +++ b/backend/vendor/golang.org/x/exp/PATENTS @@ -0,0 +1,22 @@ +Additional IP Rights Grant (Patents) + +"This implementation" means the copyrightable works distributed by +Google as part of the Go project. + +Google hereby grants to You a perpetual, worldwide, non-exclusive, +no-charge, royalty-free, irrevocable (except as stated in this section) +patent license to make, have made, use, offer to sell, sell, import, +transfer and otherwise run, modify and propagate the contents of this +implementation of Go, where such license applies only to those patent +claims, both currently owned or controlled by Google and acquired in +the future, licensable by Google that are necessarily infringed by this +implementation of Go. This grant does not include claims that would be +infringed only as a consequence of further modification of this +implementation. If you or your agent or exclusive licensee institute or +order or agree to the institution of patent litigation against any +entity (including a cross-claim or counterclaim in a lawsuit) alleging +that this implementation of Go or any code incorporated within this +implementation of Go constitutes direct or contributory patent +infringement, or inducement of patent infringement, then any patent +rights granted to you under this License for this implementation of Go +shall terminate as of the date such litigation is filed. diff --git a/backend/vendor/golang.org/x/exp/rand/exp.go b/backend/vendor/golang.org/x/exp/rand/exp.go new file mode 100644 index 0000000..0838672 --- /dev/null +++ b/backend/vendor/golang.org/x/exp/rand/exp.go @@ -0,0 +1,221 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package rand + +import ( + "math" +) + +/* + * Exponential distribution + * + * See "The Ziggurat Method for Generating Random Variables" + * (Marsaglia & Tsang, 2000) + * http://www.jstatsoft.org/v05/i08/paper [pdf] + */ + +const ( + re = 7.69711747013104972 +) + +// ExpFloat64 returns an exponentially distributed float64 in the range +// (0, +math.MaxFloat64] with an exponential distribution whose rate parameter +// (lambda) is 1 and whose mean is 1/lambda (1). +// To produce a distribution with a different rate parameter, +// callers can adjust the output using: +// +// sample = ExpFloat64() / desiredRateParameter +func (r *Rand) ExpFloat64() float64 { + for { + j := r.Uint32() + i := j & 0xFF + x := float64(j) * float64(we[i]) + if j < ke[i] { + return x + } + if i == 0 { + return re - math.Log(r.Float64()) + } + if fe[i]+float32(r.Float64())*(fe[i-1]-fe[i]) < float32(math.Exp(-x)) { + return x + } + } +} + +var ke = [256]uint32{ + 0xe290a139, 0x0, 0x9beadebc, 0xc377ac71, 0xd4ddb990, + 0xde893fb8, 0xe4a8e87c, 0xe8dff16a, 0xebf2deab, 0xee49a6e8, + 0xf0204efd, 0xf19bdb8e, 0xf2d458bb, 0xf3da104b, 0xf4b86d78, + 0xf577ad8a, 0xf61de83d, 0xf6afb784, 0xf730a573, 0xf7a37651, + 0xf80a5bb6, 0xf867189d, 0xf8bb1b4f, 0xf9079062, 0xf94d70ca, + 0xf98d8c7d, 0xf9c8928a, 0xf9ff175b, 0xfa319996, 0xfa6085f8, + 0xfa8c3a62, 0xfab5084e, 0xfadb36c8, 0xfaff0410, 0xfb20a6ea, + 0xfb404fb4, 0xfb5e2951, 0xfb7a59e9, 0xfb95038c, 0xfbae44ba, + 0xfbc638d8, 0xfbdcf892, 0xfbf29a30, 0xfc0731df, 0xfc1ad1ed, + 0xfc2d8b02, 0xfc3f6c4d, 0xfc5083ac, 0xfc60ddd1, 0xfc708662, + 0xfc7f8810, 0xfc8decb4, 0xfc9bbd62, 0xfca9027c, 0xfcb5c3c3, + 0xfcc20864, 0xfccdd70a, 0xfcd935e3, 0xfce42ab0, 0xfceebace, + 0xfcf8eb3b, 0xfd02c0a0, 0xfd0c3f59, 0xfd156b7b, 0xfd1e48d6, + 0xfd26daff, 0xfd2f2552, 0xfd372af7, 0xfd3eeee5, 0xfd4673e7, + 0xfd4dbc9e, 0xfd54cb85, 0xfd5ba2f2, 0xfd62451b, 0xfd68b415, + 0xfd6ef1da, 0xfd750047, 0xfd7ae120, 0xfd809612, 0xfd8620b4, + 0xfd8b8285, 0xfd90bcf5, 0xfd95d15e, 0xfd9ac10b, 0xfd9f8d36, + 0xfda43708, 0xfda8bf9e, 0xfdad2806, 0xfdb17141, 0xfdb59c46, + 0xfdb9a9fd, 0xfdbd9b46, 0xfdc170f6, 0xfdc52bd8, 0xfdc8ccac, + 0xfdcc542d, 0xfdcfc30b, 0xfdd319ef, 0xfdd6597a, 0xfdd98245, + 0xfddc94e5, 0xfddf91e6, 0xfde279ce, 0xfde54d1f, 0xfde80c52, + 0xfdeab7de, 0xfded5034, 0xfdefd5be, 0xfdf248e3, 0xfdf4aa06, + 0xfdf6f984, 0xfdf937b6, 0xfdfb64f4, 0xfdfd818d, 0xfdff8dd0, + 0xfe018a08, 0xfe03767a, 0xfe05536c, 0xfe07211c, 0xfe08dfc9, + 0xfe0a8fab, 0xfe0c30fb, 0xfe0dc3ec, 0xfe0f48b1, 0xfe10bf76, + 0xfe122869, 0xfe1383b4, 0xfe14d17c, 0xfe1611e7, 0xfe174516, + 0xfe186b2a, 0xfe19843e, 0xfe1a9070, 0xfe1b8fd6, 0xfe1c8289, + 0xfe1d689b, 0xfe1e4220, 0xfe1f0f26, 0xfe1fcfbc, 0xfe2083ed, + 0xfe212bc3, 0xfe21c745, 0xfe225678, 0xfe22d95f, 0xfe234ffb, + 0xfe23ba4a, 0xfe241849, 0xfe2469f2, 0xfe24af3c, 0xfe24e81e, + 0xfe25148b, 0xfe253474, 0xfe2547c7, 0xfe254e70, 0xfe25485a, + 0xfe25356a, 0xfe251586, 0xfe24e88f, 0xfe24ae64, 0xfe2466e1, + 0xfe2411df, 0xfe23af34, 0xfe233eb4, 0xfe22c02c, 0xfe22336b, + 0xfe219838, 0xfe20ee58, 0xfe20358c, 0xfe1f6d92, 0xfe1e9621, + 0xfe1daef0, 0xfe1cb7ac, 0xfe1bb002, 0xfe1a9798, 0xfe196e0d, + 0xfe1832fd, 0xfe16e5fe, 0xfe15869d, 0xfe141464, 0xfe128ed3, + 0xfe10f565, 0xfe0f478c, 0xfe0d84b1, 0xfe0bac36, 0xfe09bd73, + 0xfe07b7b5, 0xfe059a40, 0xfe03644c, 0xfe011504, 0xfdfeab88, + 0xfdfc26e9, 0xfdf98629, 0xfdf6c83b, 0xfdf3ec01, 0xfdf0f04a, + 0xfdedd3d1, 0xfdea953d, 0xfde7331e, 0xfde3abe9, 0xfddffdfb, + 0xfddc2791, 0xfdd826cd, 0xfdd3f9a8, 0xfdcf9dfc, 0xfdcb1176, + 0xfdc65198, 0xfdc15bb3, 0xfdbc2ce2, 0xfdb6c206, 0xfdb117be, + 0xfdab2a63, 0xfda4f5fd, 0xfd9e7640, 0xfd97a67a, 0xfd908192, + 0xfd8901f2, 0xfd812182, 0xfd78d98e, 0xfd7022bb, 0xfd66f4ed, + 0xfd5d4732, 0xfd530f9c, 0xfd48432b, 0xfd3cd59a, 0xfd30b936, + 0xfd23dea4, 0xfd16349e, 0xfd07a7a3, 0xfcf8219b, 0xfce7895b, + 0xfcd5c220, 0xfcc2aadb, 0xfcae1d5e, 0xfc97ed4e, 0xfc7fe6d4, + 0xfc65ccf3, 0xfc495762, 0xfc2a2fc8, 0xfc07ee19, 0xfbe213c1, + 0xfbb8051a, 0xfb890078, 0xfb5411a5, 0xfb180005, 0xfad33482, + 0xfa839276, 0xfa263b32, 0xf9b72d1c, 0xf930a1a2, 0xf889f023, + 0xf7b577d2, 0xf69c650c, 0xf51530f0, 0xf2cb0e3c, 0xeeefb15d, + 0xe6da6ecf, +} +var we = [256]float32{ + 2.0249555e-09, 1.486674e-11, 2.4409617e-11, 3.1968806e-11, + 3.844677e-11, 4.4228204e-11, 4.9516443e-11, 5.443359e-11, + 5.905944e-11, 6.344942e-11, 6.7643814e-11, 7.1672945e-11, + 7.556032e-11, 7.932458e-11, 8.298079e-11, 8.654132e-11, + 9.0016515e-11, 9.3415074e-11, 9.674443e-11, 1.0001099e-10, + 1.03220314e-10, 1.06377254e-10, 1.09486115e-10, 1.1255068e-10, + 1.1557435e-10, 1.1856015e-10, 1.2151083e-10, 1.2442886e-10, + 1.2731648e-10, 1.3017575e-10, 1.3300853e-10, 1.3581657e-10, + 1.3860142e-10, 1.4136457e-10, 1.4410738e-10, 1.4683108e-10, + 1.4953687e-10, 1.5222583e-10, 1.54899e-10, 1.5755733e-10, + 1.6020171e-10, 1.6283301e-10, 1.6545203e-10, 1.6805951e-10, + 1.7065617e-10, 1.732427e-10, 1.7581973e-10, 1.7838787e-10, + 1.8094774e-10, 1.8349985e-10, 1.8604476e-10, 1.8858298e-10, + 1.9111498e-10, 1.9364126e-10, 1.9616223e-10, 1.9867835e-10, + 2.0119004e-10, 2.0369768e-10, 2.0620168e-10, 2.087024e-10, + 2.1120022e-10, 2.136955e-10, 2.1618855e-10, 2.1867974e-10, + 2.2116936e-10, 2.2365775e-10, 2.261452e-10, 2.2863202e-10, + 2.311185e-10, 2.3360494e-10, 2.360916e-10, 2.3857874e-10, + 2.4106667e-10, 2.4355562e-10, 2.4604588e-10, 2.485377e-10, + 2.5103128e-10, 2.5352695e-10, 2.560249e-10, 2.585254e-10, + 2.6102867e-10, 2.6353494e-10, 2.6604446e-10, 2.6855745e-10, + 2.7107416e-10, 2.7359479e-10, 2.761196e-10, 2.7864877e-10, + 2.8118255e-10, 2.8372119e-10, 2.8626485e-10, 2.888138e-10, + 2.9136826e-10, 2.939284e-10, 2.9649452e-10, 2.9906677e-10, + 3.016454e-10, 3.0423064e-10, 3.0682268e-10, 3.0942177e-10, + 3.1202813e-10, 3.1464195e-10, 3.1726352e-10, 3.19893e-10, + 3.2253064e-10, 3.251767e-10, 3.2783135e-10, 3.3049485e-10, + 3.3316744e-10, 3.3584938e-10, 3.3854083e-10, 3.4124212e-10, + 3.4395342e-10, 3.46675e-10, 3.4940711e-10, 3.5215003e-10, + 3.5490397e-10, 3.5766917e-10, 3.6044595e-10, 3.6323455e-10, + 3.660352e-10, 3.6884823e-10, 3.7167386e-10, 3.745124e-10, + 3.773641e-10, 3.802293e-10, 3.8310827e-10, 3.860013e-10, + 3.8890866e-10, 3.918307e-10, 3.9476775e-10, 3.9772008e-10, + 4.0068804e-10, 4.0367196e-10, 4.0667217e-10, 4.09689e-10, + 4.1272286e-10, 4.1577405e-10, 4.1884296e-10, 4.2192994e-10, + 4.250354e-10, 4.281597e-10, 4.313033e-10, 4.3446652e-10, + 4.3764986e-10, 4.408537e-10, 4.4407847e-10, 4.4732465e-10, + 4.5059267e-10, 4.5388301e-10, 4.571962e-10, 4.6053267e-10, + 4.6389292e-10, 4.6727755e-10, 4.70687e-10, 4.741219e-10, + 4.7758275e-10, 4.810702e-10, 4.845848e-10, 4.8812715e-10, + 4.9169796e-10, 4.9529775e-10, 4.989273e-10, 5.0258725e-10, + 5.0627835e-10, 5.100013e-10, 5.1375687e-10, 5.1754584e-10, + 5.21369e-10, 5.2522725e-10, 5.2912136e-10, 5.330522e-10, + 5.370208e-10, 5.4102806e-10, 5.45075e-10, 5.491625e-10, + 5.532918e-10, 5.5746385e-10, 5.616799e-10, 5.6594107e-10, + 5.7024857e-10, 5.746037e-10, 5.7900773e-10, 5.834621e-10, + 5.8796823e-10, 5.925276e-10, 5.971417e-10, 6.018122e-10, + 6.065408e-10, 6.113292e-10, 6.1617933e-10, 6.2109295e-10, + 6.260722e-10, 6.3111916e-10, 6.3623595e-10, 6.4142497e-10, + 6.4668854e-10, 6.5202926e-10, 6.5744976e-10, 6.6295286e-10, + 6.6854156e-10, 6.742188e-10, 6.79988e-10, 6.858526e-10, + 6.9181616e-10, 6.978826e-10, 7.04056e-10, 7.103407e-10, + 7.167412e-10, 7.2326256e-10, 7.2990985e-10, 7.366886e-10, + 7.4360473e-10, 7.5066453e-10, 7.5787476e-10, 7.6524265e-10, + 7.7277595e-10, 7.80483e-10, 7.883728e-10, 7.9645507e-10, + 8.047402e-10, 8.1323964e-10, 8.219657e-10, 8.309319e-10, + 8.401528e-10, 8.496445e-10, 8.594247e-10, 8.6951274e-10, + 8.799301e-10, 8.9070046e-10, 9.018503e-10, 9.134092e-10, + 9.254101e-10, 9.378904e-10, 9.508923e-10, 9.644638e-10, + 9.786603e-10, 9.935448e-10, 1.0091913e-09, 1.025686e-09, + 1.0431306e-09, 1.0616465e-09, 1.08138e-09, 1.1025096e-09, + 1.1252564e-09, 1.1498986e-09, 1.1767932e-09, 1.206409e-09, + 1.2393786e-09, 1.276585e-09, 1.3193139e-09, 1.3695435e-09, + 1.4305498e-09, 1.508365e-09, 1.6160854e-09, 1.7921248e-09, +} +var fe = [256]float32{ + 1, 0.9381437, 0.90046996, 0.87170434, 0.8477855, 0.8269933, + 0.8084217, 0.7915276, 0.77595687, 0.7614634, 0.7478686, + 0.7350381, 0.72286767, 0.71127474, 0.70019263, 0.6895665, + 0.67935055, 0.6695063, 0.66000086, 0.65080583, 0.6418967, + 0.63325197, 0.6248527, 0.6166822, 0.60872537, 0.60096896, + 0.5934009, 0.58601034, 0.5787874, 0.57172304, 0.5648092, + 0.5580383, 0.5514034, 0.5448982, 0.5385169, 0.53225386, + 0.5261042, 0.52006316, 0.5141264, 0.50828975, 0.5025495, + 0.496902, 0.49134386, 0.485872, 0.48048335, 0.4751752, + 0.46994483, 0.46478975, 0.45970762, 0.45469615, 0.44975325, + 0.44487688, 0.44006512, 0.43531612, 0.43062815, 0.42599955, + 0.42142874, 0.4169142, 0.41245446, 0.40804818, 0.403694, + 0.3993907, 0.39513698, 0.39093173, 0.38677382, 0.38266218, + 0.37859577, 0.37457356, 0.37059465, 0.3666581, 0.362763, + 0.35890847, 0.35509375, 0.351318, 0.3475805, 0.34388044, + 0.34021714, 0.3365899, 0.33299807, 0.32944095, 0.32591796, + 0.3224285, 0.3189719, 0.31554767, 0.31215525, 0.30879408, + 0.3054636, 0.3021634, 0.29889292, 0.2956517, 0.29243928, + 0.28925523, 0.28609908, 0.28297043, 0.27986884, 0.27679393, + 0.2737453, 0.2707226, 0.2677254, 0.26475343, 0.26180625, + 0.25888354, 0.25598502, 0.2531103, 0.25025907, 0.24743107, + 0.24462597, 0.24184346, 0.23908329, 0.23634516, 0.23362878, + 0.23093392, 0.2282603, 0.22560766, 0.22297576, 0.22036438, + 0.21777324, 0.21520215, 0.21265087, 0.21011916, 0.20760682, + 0.20511365, 0.20263945, 0.20018397, 0.19774707, 0.19532852, + 0.19292815, 0.19054577, 0.1881812, 0.18583426, 0.18350479, + 0.1811926, 0.17889754, 0.17661946, 0.17435817, 0.17211354, + 0.1698854, 0.16767362, 0.16547804, 0.16329853, 0.16113494, + 0.15898713, 0.15685499, 0.15473837, 0.15263714, 0.15055119, + 0.14848037, 0.14642459, 0.14438373, 0.14235765, 0.14034624, + 0.13834943, 0.13636707, 0.13439907, 0.13244532, 0.13050574, + 0.1285802, 0.12666863, 0.12477092, 0.12288698, 0.12101672, + 0.119160056, 0.1173169, 0.115487166, 0.11367077, 0.11186763, + 0.11007768, 0.10830083, 0.10653701, 0.10478614, 0.10304816, + 0.101323, 0.09961058, 0.09791085, 0.09622374, 0.09454919, + 0.09288713, 0.091237515, 0.08960028, 0.087975375, 0.08636274, + 0.08476233, 0.083174095, 0.081597984, 0.08003395, 0.07848195, + 0.076941945, 0.07541389, 0.07389775, 0.072393484, 0.07090106, + 0.069420435, 0.06795159, 0.066494495, 0.06504912, 0.063615434, + 0.062193416, 0.060783047, 0.059384305, 0.057997175, + 0.05662164, 0.05525769, 0.053905312, 0.052564494, 0.051235236, + 0.049917534, 0.048611384, 0.047316793, 0.046033762, 0.0447623, + 0.043502413, 0.042254124, 0.041017443, 0.039792392, + 0.038578995, 0.037377283, 0.036187284, 0.035009038, + 0.033842582, 0.032687962, 0.031545233, 0.030414443, 0.02929566, + 0.02818895, 0.027094385, 0.026012046, 0.024942026, 0.023884421, + 0.022839336, 0.021806888, 0.020787204, 0.019780423, 0.0187867, + 0.0178062, 0.016839107, 0.015885621, 0.014945968, 0.014020392, + 0.013109165, 0.012212592, 0.011331013, 0.01046481, 0.009614414, + 0.008780315, 0.007963077, 0.0071633533, 0.006381906, + 0.0056196423, 0.0048776558, 0.004157295, 0.0034602648, + 0.0027887989, 0.0021459677, 0.0015362998, 0.0009672693, + 0.00045413437, +} diff --git a/backend/vendor/golang.org/x/exp/rand/normal.go b/backend/vendor/golang.org/x/exp/rand/normal.go new file mode 100644 index 0000000..b66da3a --- /dev/null +++ b/backend/vendor/golang.org/x/exp/rand/normal.go @@ -0,0 +1,156 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package rand + +import ( + "math" +) + +/* + * Normal distribution + * + * See "The Ziggurat Method for Generating Random Variables" + * (Marsaglia & Tsang, 2000) + * http://www.jstatsoft.org/v05/i08/paper [pdf] + */ + +const ( + rn = 3.442619855899 +) + +func absInt32(i int32) uint32 { + if i < 0 { + return uint32(-i) + } + return uint32(i) +} + +// NormFloat64 returns a normally distributed float64 in the range +// [-math.MaxFloat64, +math.MaxFloat64] with +// standard normal distribution (mean = 0, stddev = 1). +// To produce a different normal distribution, callers can +// adjust the output using: +// +// sample = NormFloat64() * desiredStdDev + desiredMean +func (r *Rand) NormFloat64() float64 { + for { + j := int32(r.Uint32()) // Possibly negative + i := j & 0x7F + x := float64(j) * float64(wn[i]) + if absInt32(j) < kn[i] { + // This case should be hit better than 99% of the time. + return x + } + + if i == 0 { + // This extra work is only required for the base strip. + for { + x = -math.Log(r.Float64()) * (1.0 / rn) + y := -math.Log(r.Float64()) + if y+y >= x*x { + break + } + } + if j > 0 { + return rn + x + } + return -rn - x + } + if fn[i]+float32(r.Float64())*(fn[i-1]-fn[i]) < float32(math.Exp(-.5*x*x)) { + return x + } + } +} + +var kn = [128]uint32{ + 0x76ad2212, 0x0, 0x600f1b53, 0x6ce447a6, 0x725b46a2, + 0x7560051d, 0x774921eb, 0x789a25bd, 0x799045c3, 0x7a4bce5d, + 0x7adf629f, 0x7b5682a6, 0x7bb8a8c6, 0x7c0ae722, 0x7c50cce7, + 0x7c8cec5b, 0x7cc12cd6, 0x7ceefed2, 0x7d177e0b, 0x7d3b8883, + 0x7d5bce6c, 0x7d78dd64, 0x7d932886, 0x7dab0e57, 0x7dc0dd30, + 0x7dd4d688, 0x7de73185, 0x7df81cea, 0x7e07c0a3, 0x7e163efa, + 0x7e23b587, 0x7e303dfd, 0x7e3beec2, 0x7e46db77, 0x7e51155d, + 0x7e5aabb3, 0x7e63abf7, 0x7e6c222c, 0x7e741906, 0x7e7b9a18, + 0x7e82adfa, 0x7e895c63, 0x7e8fac4b, 0x7e95a3fb, 0x7e9b4924, + 0x7ea0a0ef, 0x7ea5b00d, 0x7eaa7ac3, 0x7eaf04f3, 0x7eb3522a, + 0x7eb765a5, 0x7ebb4259, 0x7ebeeafd, 0x7ec2620a, 0x7ec5a9c4, + 0x7ec8c441, 0x7ecbb365, 0x7ece78ed, 0x7ed11671, 0x7ed38d62, + 0x7ed5df12, 0x7ed80cb4, 0x7eda175c, 0x7edc0005, 0x7eddc78e, + 0x7edf6ebf, 0x7ee0f647, 0x7ee25ebe, 0x7ee3a8a9, 0x7ee4d473, + 0x7ee5e276, 0x7ee6d2f5, 0x7ee7a620, 0x7ee85c10, 0x7ee8f4cd, + 0x7ee97047, 0x7ee9ce59, 0x7eea0eca, 0x7eea3147, 0x7eea3568, + 0x7eea1aab, 0x7ee9e071, 0x7ee98602, 0x7ee90a88, 0x7ee86d08, + 0x7ee7ac6a, 0x7ee6c769, 0x7ee5bc9c, 0x7ee48a67, 0x7ee32efc, + 0x7ee1a857, 0x7edff42f, 0x7ede0ffa, 0x7edbf8d9, 0x7ed9ab94, + 0x7ed7248d, 0x7ed45fae, 0x7ed1585c, 0x7ece095f, 0x7eca6ccb, + 0x7ec67be2, 0x7ec22eee, 0x7ebd7d1a, 0x7eb85c35, 0x7eb2c075, + 0x7eac9c20, 0x7ea5df27, 0x7e9e769f, 0x7e964c16, 0x7e8d44ba, + 0x7e834033, 0x7e781728, 0x7e6b9933, 0x7e5d8a1a, 0x7e4d9ded, + 0x7e3b737a, 0x7e268c2f, 0x7e0e3ff5, 0x7df1aa5d, 0x7dcf8c72, + 0x7da61a1e, 0x7d72a0fb, 0x7d30e097, 0x7cd9b4ab, 0x7c600f1a, + 0x7ba90bdc, 0x7a722176, 0x77d664e5, +} +var wn = [128]float32{ + 1.7290405e-09, 1.2680929e-10, 1.6897518e-10, 1.9862688e-10, + 2.2232431e-10, 2.4244937e-10, 2.601613e-10, 2.7611988e-10, + 2.9073963e-10, 3.042997e-10, 3.1699796e-10, 3.289802e-10, + 3.4035738e-10, 3.5121603e-10, 3.616251e-10, 3.7164058e-10, + 3.8130857e-10, 3.9066758e-10, 3.9975012e-10, 4.08584e-10, + 4.1719309e-10, 4.2559822e-10, 4.338176e-10, 4.418672e-10, + 4.497613e-10, 4.5751258e-10, 4.651324e-10, 4.7263105e-10, + 4.8001775e-10, 4.87301e-10, 4.944885e-10, 5.015873e-10, + 5.0860405e-10, 5.155446e-10, 5.2241467e-10, 5.2921934e-10, + 5.359635e-10, 5.426517e-10, 5.4928817e-10, 5.5587696e-10, + 5.624219e-10, 5.6892646e-10, 5.753941e-10, 5.818282e-10, + 5.882317e-10, 5.946077e-10, 6.00959e-10, 6.072884e-10, + 6.135985e-10, 6.19892e-10, 6.2617134e-10, 6.3243905e-10, + 6.386974e-10, 6.449488e-10, 6.511956e-10, 6.5744005e-10, + 6.6368433e-10, 6.699307e-10, 6.7618144e-10, 6.824387e-10, + 6.8870465e-10, 6.949815e-10, 7.012715e-10, 7.075768e-10, + 7.1389966e-10, 7.202424e-10, 7.266073e-10, 7.329966e-10, + 7.394128e-10, 7.4585826e-10, 7.5233547e-10, 7.58847e-10, + 7.653954e-10, 7.719835e-10, 7.7861395e-10, 7.852897e-10, + 7.920138e-10, 7.987892e-10, 8.0561924e-10, 8.125073e-10, + 8.194569e-10, 8.2647167e-10, 8.3355556e-10, 8.407127e-10, + 8.479473e-10, 8.55264e-10, 8.6266755e-10, 8.7016316e-10, + 8.777562e-10, 8.8545243e-10, 8.932582e-10, 9.0117996e-10, + 9.09225e-10, 9.174008e-10, 9.2571584e-10, 9.341788e-10, + 9.427997e-10, 9.515889e-10, 9.605579e-10, 9.697193e-10, + 9.790869e-10, 9.88676e-10, 9.985036e-10, 1.0085882e-09, + 1.0189509e-09, 1.0296151e-09, 1.0406069e-09, 1.0519566e-09, + 1.063698e-09, 1.0758702e-09, 1.0885183e-09, 1.1016947e-09, + 1.1154611e-09, 1.1298902e-09, 1.1450696e-09, 1.1611052e-09, + 1.1781276e-09, 1.1962995e-09, 1.2158287e-09, 1.2369856e-09, + 1.2601323e-09, 1.2857697e-09, 1.3146202e-09, 1.347784e-09, + 1.3870636e-09, 1.4357403e-09, 1.5008659e-09, 1.6030948e-09, +} +var fn = [128]float32{ + 1, 0.9635997, 0.9362827, 0.9130436, 0.89228165, 0.87324303, + 0.8555006, 0.8387836, 0.8229072, 0.8077383, 0.793177, + 0.7791461, 0.7655842, 0.7524416, 0.73967725, 0.7272569, + 0.7151515, 0.7033361, 0.69178915, 0.68049186, 0.6694277, + 0.658582, 0.6479418, 0.63749546, 0.6272325, 0.6171434, + 0.6072195, 0.5974532, 0.58783704, 0.5783647, 0.56903, + 0.5598274, 0.5507518, 0.54179835, 0.5329627, 0.52424055, + 0.5156282, 0.50712204, 0.49871865, 0.49041483, 0.48220766, + 0.4740943, 0.46607214, 0.4581387, 0.45029163, 0.44252872, + 0.43484783, 0.427247, 0.41972435, 0.41227803, 0.40490642, + 0.39760786, 0.3903808, 0.3832238, 0.37613547, 0.36911446, + 0.3621595, 0.35526937, 0.34844297, 0.34167916, 0.33497685, + 0.3283351, 0.3217529, 0.3152294, 0.30876362, 0.30235484, + 0.29600215, 0.28970486, 0.2834622, 0.2772735, 0.27113807, + 0.2650553, 0.25902456, 0.2530453, 0.24711695, 0.241239, + 0.23541094, 0.22963232, 0.2239027, 0.21822165, 0.21258877, + 0.20700371, 0.20146611, 0.19597565, 0.19053204, 0.18513499, + 0.17978427, 0.17447963, 0.1692209, 0.16400786, 0.15884037, + 0.15371831, 0.14864157, 0.14361008, 0.13862377, 0.13368265, + 0.12878671, 0.12393598, 0.119130544, 0.11437051, 0.10965602, + 0.104987256, 0.10036444, 0.095787846, 0.0912578, 0.08677467, + 0.0823389, 0.077950984, 0.073611505, 0.06932112, 0.06508058, + 0.06089077, 0.056752663, 0.0526674, 0.048636295, 0.044660863, + 0.040742867, 0.03688439, 0.033087887, 0.029356318, + 0.025693292, 0.022103304, 0.018592102, 0.015167298, + 0.011839478, 0.008624485, 0.005548995, 0.0026696292, +} diff --git a/backend/vendor/golang.org/x/exp/rand/rand.go b/backend/vendor/golang.org/x/exp/rand/rand.go new file mode 100644 index 0000000..16ecc37 --- /dev/null +++ b/backend/vendor/golang.org/x/exp/rand/rand.go @@ -0,0 +1,366 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package rand implements pseudo-random number generators. +// +// For random numbers suitable for security-sensitive work, see the crypto/rand +// package. +// +// Deprecated: use the math/rand/v2 package instead. This package is +// scheduled to be tagged and deleted, per https://go.dev/issue/61716. +package rand + +import "sync" + +// A Source represents a source of uniformly-distributed +// pseudo-random int64 values in the range [0, 1<<64). +type Source interface { + Uint64() uint64 + Seed(seed uint64) +} + +// NewSource returns a new pseudo-random Source seeded with the given value. +func NewSource(seed uint64) Source { + var rng PCGSource + rng.Seed(seed) + return &rng +} + +// A Rand is a source of random numbers. +type Rand struct { + src Source + + // readVal contains remainder of 64-bit integer used for bytes + // generation during most recent Read call. + // It is saved so next Read call can start where the previous + // one finished. + readVal uint64 + // readPos indicates the number of low-order bytes of readVal + // that are still valid. + readPos int8 +} + +// New returns a new Rand that uses random values from src +// to generate other random values. +func New(src Source) *Rand { + return &Rand{src: src} +} + +// Seed uses the provided seed value to initialize the generator to a deterministic state. +// Seed should not be called concurrently with any other Rand method. +func (r *Rand) Seed(seed uint64) { + if lk, ok := r.src.(*LockedSource); ok { + lk.seedPos(seed, &r.readPos) + return + } + + r.src.Seed(seed) + r.readPos = 0 +} + +// Uint64 returns a pseudo-random 64-bit integer as a uint64. +func (r *Rand) Uint64() uint64 { return r.src.Uint64() } + +// Int63 returns a non-negative pseudo-random 63-bit integer as an int64. +func (r *Rand) Int63() int64 { return int64(r.src.Uint64() &^ (1 << 63)) } + +// Uint32 returns a pseudo-random 32-bit value as a uint32. +func (r *Rand) Uint32() uint32 { return uint32(r.Uint64() >> 32) } + +// Int31 returns a non-negative pseudo-random 31-bit integer as an int32. +func (r *Rand) Int31() int32 { return int32(r.Uint64() >> 33) } + +// Int returns a non-negative pseudo-random int. +func (r *Rand) Int() int { + u := uint(r.Uint64()) + return int(u << 1 >> 1) // clear sign bit. +} + +const maxUint64 = (1 << 64) - 1 + +// Uint64n returns, as a uint64, a pseudo-random number in [0,n). +// It is guaranteed more uniform than taking a Source value mod n +// for any n that is not a power of 2. +func (r *Rand) Uint64n(n uint64) uint64 { + if n&(n-1) == 0 { // n is power of two, can mask + if n == 0 { + panic("invalid argument to Uint64n") + } + return r.Uint64() & (n - 1) + } + // If n does not divide v, to avoid bias we must not use + // a v that is within maxUint64%n of the top of the range. + v := r.Uint64() + if v > maxUint64-n { // Fast check. + ceiling := maxUint64 - maxUint64%n + for v >= ceiling { + v = r.Uint64() + } + } + + return v % n +} + +// Int63n returns, as an int64, a non-negative pseudo-random number in [0,n). +// It panics if n <= 0. +func (r *Rand) Int63n(n int64) int64 { + if n <= 0 { + panic("invalid argument to Int63n") + } + return int64(r.Uint64n(uint64(n))) +} + +// Int31n returns, as an int32, a non-negative pseudo-random number in [0,n). +// It panics if n <= 0. +func (r *Rand) Int31n(n int32) int32 { + if n <= 0 { + panic("invalid argument to Int31n") + } + // TODO: Avoid some 64-bit ops to make it more efficient on 32-bit machines. + return int32(r.Uint64n(uint64(n))) +} + +// Intn returns, as an int, a non-negative pseudo-random number in [0,n). +// It panics if n <= 0. +func (r *Rand) Intn(n int) int { + if n <= 0 { + panic("invalid argument to Intn") + } + // TODO: Avoid some 64-bit ops to make it more efficient on 32-bit machines. + return int(r.Uint64n(uint64(n))) +} + +// Float64 returns, as a float64, a pseudo-random number in [0.0,1.0). +func (r *Rand) Float64() float64 { + // There is one bug in the value stream: r.Int63() may be so close + // to 1<<63 that the division rounds up to 1.0, and we've guaranteed + // that the result is always less than 1.0. + // + // We tried to fix this by mapping 1.0 back to 0.0, but since float64 + // values near 0 are much denser than near 1, mapping 1 to 0 caused + // a theoretically significant overshoot in the probability of returning 0. + // Instead of that, if we round up to 1, just try again. + // Getting 1 only happens 1/2⁵³ of the time, so most clients + // will not observe it anyway. +again: + f := float64(r.Uint64n(1<<53)) / (1 << 53) + if f == 1.0 { + goto again // resample; this branch is taken O(never) + } + return f +} + +// Float32 returns, as a float32, a pseudo-random number in [0.0,1.0). +func (r *Rand) Float32() float32 { + // We do not want to return 1.0. + // This only happens 1/2²⁴ of the time (plus the 1/2⁵³ of the time in Float64). +again: + f := float32(r.Float64()) + if f == 1 { + goto again // resample; this branch is taken O(very rarely) + } + return f +} + +// Perm returns, as a slice of n ints, a pseudo-random permutation of the integers [0,n). +func (r *Rand) Perm(n int) []int { + m := make([]int, n) + // In the following loop, the iteration when i=0 always swaps m[0] with m[0]. + // A change to remove this useless iteration is to assign 1 to i in the init + // statement. But Perm also effects r. Making this change will affect + // the final state of r. So this change can't be made for compatibility + // reasons for Go 1. + for i := 0; i < n; i++ { + j := r.Intn(i + 1) + m[i] = m[j] + m[j] = i + } + return m +} + +// Shuffle pseudo-randomizes the order of elements. +// n is the number of elements. Shuffle panics if n < 0. +// swap swaps the elements with indexes i and j. +func (r *Rand) Shuffle(n int, swap func(i, j int)) { + if n < 0 { + panic("invalid argument to Shuffle") + } + + // Fisher-Yates shuffle: https://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle + // Shuffle really ought not be called with n that doesn't fit in 32 bits. + // Not only will it take a very long time, but with 2³¹! possible permutations, + // there's no way that any PRNG can have a big enough internal state to + // generate even a minuscule percentage of the possible permutations. + // Nevertheless, the right API signature accepts an int n, so handle it as best we can. + i := n - 1 + for ; i > 1<<31-1-1; i-- { + j := int(r.Int63n(int64(i + 1))) + swap(i, j) + } + for ; i > 0; i-- { + j := int(r.Int31n(int32(i + 1))) + swap(i, j) + } +} + +// Read generates len(p) random bytes and writes them into p. It +// always returns len(p) and a nil error. +// Read should not be called concurrently with any other Rand method unless +// the underlying source is a LockedSource. +func (r *Rand) Read(p []byte) (n int, err error) { + if lk, ok := r.src.(*LockedSource); ok { + return lk.Read(p, &r.readVal, &r.readPos) + } + return read(p, r.src, &r.readVal, &r.readPos) +} + +func read(p []byte, src Source, readVal *uint64, readPos *int8) (n int, err error) { + pos := *readPos + val := *readVal + rng, _ := src.(*PCGSource) + for n = 0; n < len(p); n++ { + if pos == 0 { + if rng != nil { + val = rng.Uint64() + } else { + val = src.Uint64() + } + pos = 8 + } + p[n] = byte(val) + val >>= 8 + pos-- + } + *readPos = pos + *readVal = val + return +} + +/* + * Top-level convenience functions + */ + +var globalRand = New(&LockedSource{src: *NewSource(1).(*PCGSource)}) + +// Type assert that globalRand's source is a LockedSource whose src is a PCGSource. +var _ PCGSource = globalRand.src.(*LockedSource).src + +// Seed uses the provided seed value to initialize the default Source to a +// deterministic state. If Seed is not called, the generator behaves as +// if seeded by Seed(1). +// Seed, unlike the Rand.Seed method, is safe for concurrent use. +func Seed(seed uint64) { globalRand.Seed(seed) } + +// Int63 returns a non-negative pseudo-random 63-bit integer as an int64 +// from the default Source. +func Int63() int64 { return globalRand.Int63() } + +// Uint32 returns a pseudo-random 32-bit value as a uint32 +// from the default Source. +func Uint32() uint32 { return globalRand.Uint32() } + +// Uint64 returns a pseudo-random 64-bit value as a uint64 +// from the default Source. +func Uint64() uint64 { return globalRand.Uint64() } + +// Int31 returns a non-negative pseudo-random 31-bit integer as an int32 +// from the default Source. +func Int31() int32 { return globalRand.Int31() } + +// Int returns a non-negative pseudo-random int from the default Source. +func Int() int { return globalRand.Int() } + +// Int63n returns, as an int64, a non-negative pseudo-random number in [0,n) +// from the default Source. +// It panics if n <= 0. +func Int63n(n int64) int64 { return globalRand.Int63n(n) } + +// Int31n returns, as an int32, a non-negative pseudo-random number in [0,n) +// from the default Source. +// It panics if n <= 0. +func Int31n(n int32) int32 { return globalRand.Int31n(n) } + +// Intn returns, as an int, a non-negative pseudo-random number in [0,n) +// from the default Source. +// It panics if n <= 0. +func Intn(n int) int { return globalRand.Intn(n) } + +// Float64 returns, as a float64, a pseudo-random number in [0.0,1.0) +// from the default Source. +func Float64() float64 { return globalRand.Float64() } + +// Float32 returns, as a float32, a pseudo-random number in [0.0,1.0) +// from the default Source. +func Float32() float32 { return globalRand.Float32() } + +// Perm returns, as a slice of n ints, a pseudo-random permutation of the integers [0,n) +// from the default Source. +func Perm(n int) []int { return globalRand.Perm(n) } + +// Shuffle pseudo-randomizes the order of elements using the default Source. +// n is the number of elements. Shuffle panics if n < 0. +// swap swaps the elements with indexes i and j. +func Shuffle(n int, swap func(i, j int)) { globalRand.Shuffle(n, swap) } + +// Read generates len(p) random bytes from the default Source and +// writes them into p. It always returns len(p) and a nil error. +// Read, unlike the Rand.Read method, is safe for concurrent use. +func Read(p []byte) (n int, err error) { return globalRand.Read(p) } + +// NormFloat64 returns a normally distributed float64 in the range +// [-math.MaxFloat64, +math.MaxFloat64] with +// standard normal distribution (mean = 0, stddev = 1) +// from the default Source. +// To produce a different normal distribution, callers can +// adjust the output using: +// +// sample = NormFloat64() * desiredStdDev + desiredMean +func NormFloat64() float64 { return globalRand.NormFloat64() } + +// ExpFloat64 returns an exponentially distributed float64 in the range +// (0, +math.MaxFloat64] with an exponential distribution whose rate parameter +// (lambda) is 1 and whose mean is 1/lambda (1) from the default Source. +// To produce a distribution with a different rate parameter, +// callers can adjust the output using: +// +// sample = ExpFloat64() / desiredRateParameter +func ExpFloat64() float64 { return globalRand.ExpFloat64() } + +// LockedSource is an implementation of Source that is concurrency-safe. +// A Rand using a LockedSource is safe for concurrent use. +// +// The zero value of LockedSource is valid, but should be seeded before use. +type LockedSource struct { + lk sync.Mutex + src PCGSource +} + +func (s *LockedSource) Uint64() (n uint64) { + s.lk.Lock() + n = s.src.Uint64() + s.lk.Unlock() + return +} + +func (s *LockedSource) Seed(seed uint64) { + s.lk.Lock() + s.src.Seed(seed) + s.lk.Unlock() +} + +// seedPos implements Seed for a LockedSource without a race condition. +func (s *LockedSource) seedPos(seed uint64, readPos *int8) { + s.lk.Lock() + s.src.Seed(seed) + *readPos = 0 + s.lk.Unlock() +} + +// Read implements Read for a LockedSource. +func (s *LockedSource) Read(p []byte, readVal *uint64, readPos *int8) (n int, err error) { + s.lk.Lock() + n, err = read(p, &s.src, readVal, readPos) + s.lk.Unlock() + return +} diff --git a/backend/vendor/golang.org/x/exp/rand/rng.go b/backend/vendor/golang.org/x/exp/rand/rng.go new file mode 100644 index 0000000..9b79108 --- /dev/null +++ b/backend/vendor/golang.org/x/exp/rand/rng.go @@ -0,0 +1,91 @@ +// Copyright 2017 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package rand + +import ( + "encoding/binary" + "io" + "math/bits" +) + +// PCGSource is an implementation of a 64-bit permuted congruential +// generator as defined in +// +// PCG: A Family of Simple Fast Space-Efficient Statistically Good +// Algorithms for Random Number Generation +// Melissa E. O’Neill, Harvey Mudd College +// http://www.pcg-random.org/pdf/toms-oneill-pcg-family-v1.02.pdf +// +// The generator here is the congruential generator PCG XSL RR 128/64 (LCG) +// as found in the software available at http://www.pcg-random.org/. +// It has period 2^128 with 128 bits of state, producing 64-bit values. +// Is state is represented by two uint64 words. +type PCGSource struct { + low uint64 + high uint64 +} + +const ( + maxUint32 = (1 << 32) - 1 + + multiplier = 47026247687942121848144207491837523525 + mulHigh = multiplier >> 64 + mulLow = multiplier & maxUint64 + + increment = 117397592171526113268558934119004209487 + incHigh = increment >> 64 + incLow = increment & maxUint64 + + // TODO: Use these? + initializer = 245720598905631564143578724636268694099 + initHigh = initializer >> 64 + initLow = initializer & maxUint64 +) + +// Seed uses the provided seed value to initialize the generator to a deterministic state. +func (pcg *PCGSource) Seed(seed uint64) { + pcg.low = seed + pcg.high = seed // TODO: What is right? +} + +// Uint64 returns a pseudo-random 64-bit unsigned integer as a uint64. +func (pcg *PCGSource) Uint64() uint64 { + pcg.multiply() + pcg.add() + // XOR high and low 64 bits together and rotate right by high 6 bits of state. + return bits.RotateLeft64(pcg.high^pcg.low, -int(pcg.high>>58)) +} + +func (pcg *PCGSource) add() { + var carry uint64 + pcg.low, carry = bits.Add64(pcg.low, incLow, 0) + pcg.high, _ = bits.Add64(pcg.high, incHigh, carry) +} + +func (pcg *PCGSource) multiply() { + hi, lo := bits.Mul64(pcg.low, mulLow) + hi += pcg.high * mulLow + hi += pcg.low * mulHigh + pcg.low = lo + pcg.high = hi +} + +// MarshalBinary returns the binary representation of the current state of the generator. +func (pcg *PCGSource) MarshalBinary() ([]byte, error) { + var buf [16]byte + binary.BigEndian.PutUint64(buf[:8], pcg.high) + binary.BigEndian.PutUint64(buf[8:], pcg.low) + return buf[:], nil +} + +// UnmarshalBinary sets the state of the generator to the state represented in data. +func (pcg *PCGSource) UnmarshalBinary(data []byte) error { + if len(data) < 16 { + return io.ErrUnexpectedEOF + } + pcg.low = binary.BigEndian.Uint64(data[8:]) + pcg.high = binary.BigEndian.Uint64(data[:8]) + return nil +} diff --git a/backend/vendor/golang.org/x/exp/rand/zipf.go b/backend/vendor/golang.org/x/exp/rand/zipf.go new file mode 100644 index 0000000..f04c814 --- /dev/null +++ b/backend/vendor/golang.org/x/exp/rand/zipf.go @@ -0,0 +1,77 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// W.Hormann, G.Derflinger: +// "Rejection-Inversion to Generate Variates +// from Monotone Discrete Distributions" +// http://eeyore.wu-wien.ac.at/papers/96-04-04.wh-der.ps.gz + +package rand + +import "math" + +// A Zipf generates Zipf distributed variates. +type Zipf struct { + r *Rand + imax float64 + v float64 + q float64 + s float64 + oneminusQ float64 + oneminusQinv float64 + hxm float64 + hx0minusHxm float64 +} + +func (z *Zipf) h(x float64) float64 { + return math.Exp(z.oneminusQ*math.Log(z.v+x)) * z.oneminusQinv +} + +func (z *Zipf) hinv(x float64) float64 { + return math.Exp(z.oneminusQinv*math.Log(z.oneminusQ*x)) - z.v +} + +// NewZipf returns a Zipf variate generator. +// The generator generates values k ∈ [0, imax] +// such that P(k) is proportional to (v + k) ** (-s). +// Requirements: s > 1 and v >= 1. +func NewZipf(r *Rand, s float64, v float64, imax uint64) *Zipf { + z := new(Zipf) + if s <= 1.0 || v < 1 { + return nil + } + z.r = r + z.imax = float64(imax) + z.v = v + z.q = s + z.oneminusQ = 1.0 - z.q + z.oneminusQinv = 1.0 / z.oneminusQ + z.hxm = z.h(z.imax + 0.5) + z.hx0minusHxm = z.h(0.5) - math.Exp(math.Log(z.v)*(-z.q)) - z.hxm + z.s = 1 - z.hinv(z.h(1.5)-math.Exp(-z.q*math.Log(z.v+1.0))) + return z +} + +// Uint64 returns a value drawn from the Zipf distribution described +// by the Zipf object. +func (z *Zipf) Uint64() uint64 { + if z == nil { + panic("rand: nil Zipf") + } + k := 0.0 + + for { + r := z.r.Float64() // r on [0,1] + ur := z.hxm + r*z.hx0minusHxm + x := z.hinv(ur) + k = math.Floor(x + 0.5) + if k-x <= z.s { + break + } + if ur >= z.h(k+0.5)-math.Exp(-math.Log(k+z.v)*z.q) { + break + } + } + return uint64(k) +} diff --git a/backend/vendor/golang.org/x/mod/internal/lazyregexp/lazyre.go b/backend/vendor/golang.org/x/mod/internal/lazyregexp/lazyre.go new file mode 100644 index 0000000..150f887 --- /dev/null +++ b/backend/vendor/golang.org/x/mod/internal/lazyregexp/lazyre.go @@ -0,0 +1,78 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package lazyregexp is a thin wrapper over regexp, allowing the use of global +// regexp variables without forcing them to be compiled at init. +package lazyregexp + +import ( + "os" + "regexp" + "strings" + "sync" +) + +// Regexp is a wrapper around [regexp.Regexp], where the underlying regexp will be +// compiled the first time it is needed. +type Regexp struct { + str string + once sync.Once + rx *regexp.Regexp +} + +func (r *Regexp) re() *regexp.Regexp { + r.once.Do(r.build) + return r.rx +} + +func (r *Regexp) build() { + r.rx = regexp.MustCompile(r.str) + r.str = "" +} + +func (r *Regexp) FindSubmatch(s []byte) [][]byte { + return r.re().FindSubmatch(s) +} + +func (r *Regexp) FindStringSubmatch(s string) []string { + return r.re().FindStringSubmatch(s) +} + +func (r *Regexp) FindStringSubmatchIndex(s string) []int { + return r.re().FindStringSubmatchIndex(s) +} + +func (r *Regexp) ReplaceAllString(src, repl string) string { + return r.re().ReplaceAllString(src, repl) +} + +func (r *Regexp) FindString(s string) string { + return r.re().FindString(s) +} + +func (r *Regexp) FindAllString(s string, n int) []string { + return r.re().FindAllString(s, n) +} + +func (r *Regexp) MatchString(s string) bool { + return r.re().MatchString(s) +} + +func (r *Regexp) SubexpNames() []string { + return r.re().SubexpNames() +} + +var inTest = len(os.Args) > 0 && strings.HasSuffix(strings.TrimSuffix(os.Args[0], ".exe"), ".test") + +// New creates a new lazy regexp, delaying the compiling work until it is first +// needed. If the code is being run as part of tests, the regexp compiling will +// happen immediately. +func New(str string) *Regexp { + lr := &Regexp{str: str} + if inTest { + // In tests, always compile the regexps early. + lr.re() + } + return lr +} diff --git a/backend/vendor/golang.org/x/mod/modfile/print.go b/backend/vendor/golang.org/x/mod/modfile/print.go new file mode 100644 index 0000000..2a0123d --- /dev/null +++ b/backend/vendor/golang.org/x/mod/modfile/print.go @@ -0,0 +1,184 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Module file printer. + +package modfile + +import ( + "bytes" + "fmt" + "strings" +) + +// Format returns a go.mod file as a byte slice, formatted in standard style. +func Format(f *FileSyntax) []byte { + pr := &printer{} + pr.file(f) + + // remove trailing blank lines + b := pr.Bytes() + for len(b) > 0 && b[len(b)-1] == '\n' && (len(b) == 1 || b[len(b)-2] == '\n') { + b = b[:len(b)-1] + } + return b +} + +// A printer collects the state during printing of a file or expression. +type printer struct { + bytes.Buffer // output buffer + comment []Comment // pending end-of-line comments + margin int // left margin (indent), a number of tabs +} + +// printf prints to the buffer. +func (p *printer) printf(format string, args ...interface{}) { + fmt.Fprintf(p, format, args...) +} + +// indent returns the position on the current line, in bytes, 0-indexed. +func (p *printer) indent() int { + b := p.Bytes() + n := 0 + for n < len(b) && b[len(b)-1-n] != '\n' { + n++ + } + return n +} + +// newline ends the current line, flushing end-of-line comments. +func (p *printer) newline() { + if len(p.comment) > 0 { + p.printf(" ") + for i, com := range p.comment { + if i > 0 { + p.trim() + p.printf("\n") + for i := 0; i < p.margin; i++ { + p.printf("\t") + } + } + p.printf("%s", strings.TrimSpace(com.Token)) + } + p.comment = p.comment[:0] + } + + p.trim() + if b := p.Bytes(); len(b) == 0 || (len(b) >= 2 && b[len(b)-1] == '\n' && b[len(b)-2] == '\n') { + // skip the blank line at top of file or after a blank line + } else { + p.printf("\n") + } + for i := 0; i < p.margin; i++ { + p.printf("\t") + } +} + +// trim removes trailing spaces and tabs from the current line. +func (p *printer) trim() { + // Remove trailing spaces and tabs from line we're about to end. + b := p.Bytes() + n := len(b) + for n > 0 && (b[n-1] == '\t' || b[n-1] == ' ') { + n-- + } + p.Truncate(n) +} + +// file formats the given file into the print buffer. +func (p *printer) file(f *FileSyntax) { + for _, com := range f.Before { + p.printf("%s", strings.TrimSpace(com.Token)) + p.newline() + } + + for i, stmt := range f.Stmt { + switch x := stmt.(type) { + case *CommentBlock: + // comments already handled + p.expr(x) + + default: + p.expr(x) + p.newline() + } + + for _, com := range stmt.Comment().After { + p.printf("%s", strings.TrimSpace(com.Token)) + p.newline() + } + + if i+1 < len(f.Stmt) { + p.newline() + } + } +} + +func (p *printer) expr(x Expr) { + // Emit line-comments preceding this expression. + if before := x.Comment().Before; len(before) > 0 { + // Want to print a line comment. + // Line comments must be at the current margin. + p.trim() + if p.indent() > 0 { + // There's other text on the line. Start a new line. + p.printf("\n") + } + // Re-indent to margin. + for i := 0; i < p.margin; i++ { + p.printf("\t") + } + for _, com := range before { + p.printf("%s", strings.TrimSpace(com.Token)) + p.newline() + } + } + + switch x := x.(type) { + default: + panic(fmt.Errorf("printer: unexpected type %T", x)) + + case *CommentBlock: + // done + + case *LParen: + p.printf("(") + case *RParen: + p.printf(")") + + case *Line: + p.tokens(x.Token) + + case *LineBlock: + p.tokens(x.Token) + p.printf(" ") + p.expr(&x.LParen) + p.margin++ + for _, l := range x.Line { + p.newline() + p.expr(l) + } + p.margin-- + p.newline() + p.expr(&x.RParen) + } + + // Queue end-of-line comments for printing when we + // reach the end of the line. + p.comment = append(p.comment, x.Comment().Suffix...) +} + +func (p *printer) tokens(tokens []string) { + sep := "" + for _, t := range tokens { + if t == "," || t == ")" || t == "]" || t == "}" { + sep = "" + } + p.printf("%s%s", sep, t) + sep = " " + if t == "(" || t == "[" || t == "{" { + sep = "" + } + } +} diff --git a/backend/vendor/golang.org/x/mod/modfile/read.go b/backend/vendor/golang.org/x/mod/modfile/read.go new file mode 100644 index 0000000..2d74868 --- /dev/null +++ b/backend/vendor/golang.org/x/mod/modfile/read.go @@ -0,0 +1,964 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package modfile + +import ( + "bytes" + "errors" + "fmt" + "os" + "strconv" + "strings" + "unicode" + "unicode/utf8" +) + +// A Position describes an arbitrary source position in a file, including the +// file, line, column, and byte offset. +type Position struct { + Line int // line in input (starting at 1) + LineRune int // rune in line (starting at 1) + Byte int // byte in input (starting at 0) +} + +// add returns the position at the end of s, assuming it starts at p. +func (p Position) add(s string) Position { + p.Byte += len(s) + if n := strings.Count(s, "\n"); n > 0 { + p.Line += n + s = s[strings.LastIndex(s, "\n")+1:] + p.LineRune = 1 + } + p.LineRune += utf8.RuneCountInString(s) + return p +} + +// An Expr represents an input element. +type Expr interface { + // Span returns the start and end position of the expression, + // excluding leading or trailing comments. + Span() (start, end Position) + + // Comment returns the comments attached to the expression. + // This method would normally be named 'Comments' but that + // would interfere with embedding a type of the same name. + Comment() *Comments +} + +// A Comment represents a single // comment. +type Comment struct { + Start Position + Token string // without trailing newline + Suffix bool // an end of line (not whole line) comment +} + +// Comments collects the comments associated with an expression. +type Comments struct { + Before []Comment // whole-line comments before this expression + Suffix []Comment // end-of-line comments after this expression + + // For top-level expressions only, After lists whole-line + // comments following the expression. + After []Comment +} + +// Comment returns the receiver. This isn't useful by itself, but +// a [Comments] struct is embedded into all the expression +// implementation types, and this gives each of those a Comment +// method to satisfy the Expr interface. +func (c *Comments) Comment() *Comments { + return c +} + +// A FileSyntax represents an entire go.mod file. +type FileSyntax struct { + Name string // file path + Comments + Stmt []Expr +} + +func (x *FileSyntax) Span() (start, end Position) { + if len(x.Stmt) == 0 { + return + } + start, _ = x.Stmt[0].Span() + _, end = x.Stmt[len(x.Stmt)-1].Span() + return start, end +} + +// addLine adds a line containing the given tokens to the file. +// +// If the first token of the hint matches the first token of the +// line, the new line is added at the end of the block containing hint, +// extracting hint into a new block if it is not yet in one. +// +// If the hint is non-nil buts its first token does not match, +// the new line is added after the block containing hint +// (or hint itself, if not in a block). +// +// If no hint is provided, addLine appends the line to the end of +// the last block with a matching first token, +// or to the end of the file if no such block exists. +func (x *FileSyntax) addLine(hint Expr, tokens ...string) *Line { + if hint == nil { + // If no hint given, add to the last statement of the given type. + Loop: + for i := len(x.Stmt) - 1; i >= 0; i-- { + stmt := x.Stmt[i] + switch stmt := stmt.(type) { + case *Line: + if stmt.Token != nil && stmt.Token[0] == tokens[0] { + hint = stmt + break Loop + } + case *LineBlock: + if stmt.Token[0] == tokens[0] { + hint = stmt + break Loop + } + } + } + } + + newLineAfter := func(i int) *Line { + new := &Line{Token: tokens} + if i == len(x.Stmt) { + x.Stmt = append(x.Stmt, new) + } else { + x.Stmt = append(x.Stmt, nil) + copy(x.Stmt[i+2:], x.Stmt[i+1:]) + x.Stmt[i+1] = new + } + return new + } + + if hint != nil { + for i, stmt := range x.Stmt { + switch stmt := stmt.(type) { + case *Line: + if stmt == hint { + if stmt.Token == nil || stmt.Token[0] != tokens[0] { + return newLineAfter(i) + } + + // Convert line to line block. + stmt.InBlock = true + block := &LineBlock{Token: stmt.Token[:1], Line: []*Line{stmt}} + stmt.Token = stmt.Token[1:] + x.Stmt[i] = block + new := &Line{Token: tokens[1:], InBlock: true} + block.Line = append(block.Line, new) + return new + } + + case *LineBlock: + if stmt == hint { + if stmt.Token[0] != tokens[0] { + return newLineAfter(i) + } + + new := &Line{Token: tokens[1:], InBlock: true} + stmt.Line = append(stmt.Line, new) + return new + } + + for j, line := range stmt.Line { + if line == hint { + if stmt.Token[0] != tokens[0] { + return newLineAfter(i) + } + + // Add new line after hint within the block. + stmt.Line = append(stmt.Line, nil) + copy(stmt.Line[j+2:], stmt.Line[j+1:]) + new := &Line{Token: tokens[1:], InBlock: true} + stmt.Line[j+1] = new + return new + } + } + } + } + } + + new := &Line{Token: tokens} + x.Stmt = append(x.Stmt, new) + return new +} + +func (x *FileSyntax) updateLine(line *Line, tokens ...string) { + if line.InBlock { + tokens = tokens[1:] + } + line.Token = tokens +} + +// markRemoved modifies line so that it (and its end-of-line comment, if any) +// will be dropped by (*FileSyntax).Cleanup. +func (line *Line) markRemoved() { + line.Token = nil + line.Comments.Suffix = nil +} + +// Cleanup cleans up the file syntax x after any edit operations. +// To avoid quadratic behavior, (*Line).markRemoved marks the line as dead +// by setting line.Token = nil but does not remove it from the slice +// in which it appears. After edits have all been indicated, +// calling Cleanup cleans out the dead lines. +func (x *FileSyntax) Cleanup() { + w := 0 + for _, stmt := range x.Stmt { + switch stmt := stmt.(type) { + case *Line: + if stmt.Token == nil { + continue + } + case *LineBlock: + ww := 0 + for _, line := range stmt.Line { + if line.Token != nil { + stmt.Line[ww] = line + ww++ + } + } + if ww == 0 { + continue + } + if ww == 1 && len(stmt.RParen.Comments.Before) == 0 { + // Collapse block into single line but keep the Line reference used by the + // parsed File structure. + *stmt.Line[0] = Line{ + Comments: Comments{ + Before: commentsAdd(stmt.Before, stmt.Line[0].Before), + Suffix: commentsAdd(stmt.Line[0].Suffix, stmt.Suffix), + After: commentsAdd(stmt.Line[0].After, stmt.After), + }, + Token: stringsAdd(stmt.Token, stmt.Line[0].Token), + } + x.Stmt[w] = stmt.Line[0] + w++ + continue + } + stmt.Line = stmt.Line[:ww] + } + x.Stmt[w] = stmt + w++ + } + x.Stmt = x.Stmt[:w] +} + +func commentsAdd(x, y []Comment) []Comment { + return append(x[:len(x):len(x)], y...) +} + +func stringsAdd(x, y []string) []string { + return append(x[:len(x):len(x)], y...) +} + +// A CommentBlock represents a top-level block of comments separate +// from any rule. +type CommentBlock struct { + Comments + Start Position +} + +func (x *CommentBlock) Span() (start, end Position) { + return x.Start, x.Start +} + +// A Line is a single line of tokens. +type Line struct { + Comments + Start Position + Token []string + InBlock bool + End Position +} + +func (x *Line) Span() (start, end Position) { + return x.Start, x.End +} + +// A LineBlock is a factored block of lines, like +// +// require ( +// "x" +// "y" +// ) +type LineBlock struct { + Comments + Start Position + LParen LParen + Token []string + Line []*Line + RParen RParen +} + +func (x *LineBlock) Span() (start, end Position) { + return x.Start, x.RParen.Pos.add(")") +} + +// An LParen represents the beginning of a parenthesized line block. +// It is a place to store suffix comments. +type LParen struct { + Comments + Pos Position +} + +func (x *LParen) Span() (start, end Position) { + return x.Pos, x.Pos.add(")") +} + +// An RParen represents the end of a parenthesized line block. +// It is a place to store whole-line (before) comments. +type RParen struct { + Comments + Pos Position +} + +func (x *RParen) Span() (start, end Position) { + return x.Pos, x.Pos.add(")") +} + +// An input represents a single input file being parsed. +type input struct { + // Lexing state. + filename string // name of input file, for errors + complete []byte // entire input + remaining []byte // remaining input + tokenStart []byte // token being scanned to end of input + token token // next token to be returned by lex, peek + pos Position // current input position + comments []Comment // accumulated comments + + // Parser state. + file *FileSyntax // returned top-level syntax tree + parseErrors ErrorList // errors encountered during parsing + + // Comment assignment state. + pre []Expr // all expressions, in preorder traversal + post []Expr // all expressions, in postorder traversal +} + +func newInput(filename string, data []byte) *input { + return &input{ + filename: filename, + complete: data, + remaining: data, + pos: Position{Line: 1, LineRune: 1, Byte: 0}, + } +} + +// parse parses the input file. +func parse(file string, data []byte) (f *FileSyntax, err error) { + // The parser panics for both routine errors like syntax errors + // and for programmer bugs like array index errors. + // Turn both into error returns. Catching bug panics is + // especially important when processing many files. + in := newInput(file, data) + defer func() { + if e := recover(); e != nil && e != &in.parseErrors { + in.parseErrors = append(in.parseErrors, Error{ + Filename: in.filename, + Pos: in.pos, + Err: fmt.Errorf("internal error: %v", e), + }) + } + if err == nil && len(in.parseErrors) > 0 { + err = in.parseErrors + } + }() + + // Prime the lexer by reading in the first token. It will be available + // in the next peek() or lex() call. + in.readToken() + + // Invoke the parser. + in.parseFile() + if len(in.parseErrors) > 0 { + return nil, in.parseErrors + } + in.file.Name = in.filename + + // Assign comments to nearby syntax. + in.assignComments() + + return in.file, nil +} + +// Error is called to report an error. +// Error does not return: it panics. +func (in *input) Error(s string) { + in.parseErrors = append(in.parseErrors, Error{ + Filename: in.filename, + Pos: in.pos, + Err: errors.New(s), + }) + panic(&in.parseErrors) +} + +// eof reports whether the input has reached end of file. +func (in *input) eof() bool { + return len(in.remaining) == 0 +} + +// peekRune returns the next rune in the input without consuming it. +func (in *input) peekRune() int { + if len(in.remaining) == 0 { + return 0 + } + r, _ := utf8.DecodeRune(in.remaining) + return int(r) +} + +// peekPrefix reports whether the remaining input begins with the given prefix. +func (in *input) peekPrefix(prefix string) bool { + // This is like bytes.HasPrefix(in.remaining, []byte(prefix)) + // but without the allocation of the []byte copy of prefix. + for i := 0; i < len(prefix); i++ { + if i >= len(in.remaining) || in.remaining[i] != prefix[i] { + return false + } + } + return true +} + +// readRune consumes and returns the next rune in the input. +func (in *input) readRune() int { + if len(in.remaining) == 0 { + in.Error("internal lexer error: readRune at EOF") + } + r, size := utf8.DecodeRune(in.remaining) + in.remaining = in.remaining[size:] + if r == '\n' { + in.pos.Line++ + in.pos.LineRune = 1 + } else { + in.pos.LineRune++ + } + in.pos.Byte += size + return int(r) +} + +type token struct { + kind tokenKind + pos Position + endPos Position + text string +} + +type tokenKind int + +const ( + _EOF tokenKind = -(iota + 1) + _EOLCOMMENT + _IDENT + _STRING + _COMMENT + + // newlines and punctuation tokens are allowed as ASCII codes. +) + +func (k tokenKind) isComment() bool { + return k == _COMMENT || k == _EOLCOMMENT +} + +// isEOL returns whether a token terminates a line. +func (k tokenKind) isEOL() bool { + return k == _EOF || k == _EOLCOMMENT || k == '\n' +} + +// startToken marks the beginning of the next input token. +// It must be followed by a call to endToken, once the token's text has +// been consumed using readRune. +func (in *input) startToken() { + in.tokenStart = in.remaining + in.token.text = "" + in.token.pos = in.pos +} + +// endToken marks the end of an input token. +// It records the actual token string in tok.text. +// A single trailing newline (LF or CRLF) will be removed from comment tokens. +func (in *input) endToken(kind tokenKind) { + in.token.kind = kind + text := string(in.tokenStart[:len(in.tokenStart)-len(in.remaining)]) + if kind.isComment() { + if strings.HasSuffix(text, "\r\n") { + text = text[:len(text)-2] + } else { + text = strings.TrimSuffix(text, "\n") + } + } + in.token.text = text + in.token.endPos = in.pos +} + +// peek returns the kind of the next token returned by lex. +func (in *input) peek() tokenKind { + return in.token.kind +} + +// lex is called from the parser to obtain the next input token. +func (in *input) lex() token { + tok := in.token + in.readToken() + return tok +} + +// readToken lexes the next token from the text and stores it in in.token. +func (in *input) readToken() { + // Skip past spaces, stopping at non-space or EOF. + for !in.eof() { + c := in.peekRune() + if c == ' ' || c == '\t' || c == '\r' { + in.readRune() + continue + } + + // Comment runs to end of line. + if in.peekPrefix("//") { + in.startToken() + + // Is this comment the only thing on its line? + // Find the last \n before this // and see if it's all + // spaces from there to here. + i := bytes.LastIndex(in.complete[:in.pos.Byte], []byte("\n")) + suffix := len(bytes.TrimSpace(in.complete[i+1:in.pos.Byte])) > 0 + in.readRune() + in.readRune() + + // Consume comment. + for len(in.remaining) > 0 && in.readRune() != '\n' { + } + + // If we are at top level (not in a statement), hand the comment to + // the parser as a _COMMENT token. The grammar is written + // to handle top-level comments itself. + if !suffix { + in.endToken(_COMMENT) + return + } + + // Otherwise, save comment for later attachment to syntax tree. + in.endToken(_EOLCOMMENT) + in.comments = append(in.comments, Comment{in.token.pos, in.token.text, suffix}) + return + } + + if in.peekPrefix("/*") { + in.Error("mod files must use // comments (not /* */ comments)") + } + + // Found non-space non-comment. + break + } + + // Found the beginning of the next token. + in.startToken() + + // End of file. + if in.eof() { + in.endToken(_EOF) + return + } + + // Punctuation tokens. + switch c := in.peekRune(); c { + case '\n', '(', ')', '[', ']', '{', '}', ',': + in.readRune() + in.endToken(tokenKind(c)) + return + + case '"', '`': // quoted string + quote := c + in.readRune() + for { + if in.eof() { + in.pos = in.token.pos + in.Error("unexpected EOF in string") + } + if in.peekRune() == '\n' { + in.Error("unexpected newline in string") + } + c := in.readRune() + if c == quote { + break + } + if c == '\\' && quote != '`' { + if in.eof() { + in.pos = in.token.pos + in.Error("unexpected EOF in string") + } + in.readRune() + } + } + in.endToken(_STRING) + return + } + + // Checked all punctuation. Must be identifier token. + if c := in.peekRune(); !isIdent(c) { + in.Error(fmt.Sprintf("unexpected input character %#q", c)) + } + + // Scan over identifier. + for isIdent(in.peekRune()) { + if in.peekPrefix("//") { + break + } + if in.peekPrefix("/*") { + in.Error("mod files must use // comments (not /* */ comments)") + } + in.readRune() + } + in.endToken(_IDENT) +} + +// isIdent reports whether c is an identifier rune. +// We treat most printable runes as identifier runes, except for a handful of +// ASCII punctuation characters. +func isIdent(c int) bool { + switch r := rune(c); r { + case ' ', '(', ')', '[', ']', '{', '}', ',': + return false + default: + return !unicode.IsSpace(r) && unicode.IsPrint(r) + } +} + +// Comment assignment. +// We build two lists of all subexpressions, preorder and postorder. +// The preorder list is ordered by start location, with outer expressions first. +// The postorder list is ordered by end location, with outer expressions last. +// We use the preorder list to assign each whole-line comment to the syntax +// immediately following it, and we use the postorder list to assign each +// end-of-line comment to the syntax immediately preceding it. + +// order walks the expression adding it and its subexpressions to the +// preorder and postorder lists. +func (in *input) order(x Expr) { + if x != nil { + in.pre = append(in.pre, x) + } + switch x := x.(type) { + default: + panic(fmt.Errorf("order: unexpected type %T", x)) + case nil: + // nothing + case *LParen, *RParen: + // nothing + case *CommentBlock: + // nothing + case *Line: + // nothing + case *FileSyntax: + for _, stmt := range x.Stmt { + in.order(stmt) + } + case *LineBlock: + in.order(&x.LParen) + for _, l := range x.Line { + in.order(l) + } + in.order(&x.RParen) + } + if x != nil { + in.post = append(in.post, x) + } +} + +// assignComments attaches comments to nearby syntax. +func (in *input) assignComments() { + const debug = false + + // Generate preorder and postorder lists. + in.order(in.file) + + // Split into whole-line comments and suffix comments. + var line, suffix []Comment + for _, com := range in.comments { + if com.Suffix { + suffix = append(suffix, com) + } else { + line = append(line, com) + } + } + + if debug { + for _, c := range line { + fmt.Fprintf(os.Stderr, "LINE %q :%d:%d #%d\n", c.Token, c.Start.Line, c.Start.LineRune, c.Start.Byte) + } + } + + // Assign line comments to syntax immediately following. + for _, x := range in.pre { + start, _ := x.Span() + if debug { + fmt.Fprintf(os.Stderr, "pre %T :%d:%d #%d\n", x, start.Line, start.LineRune, start.Byte) + } + xcom := x.Comment() + for len(line) > 0 && start.Byte >= line[0].Start.Byte { + if debug { + fmt.Fprintf(os.Stderr, "ASSIGN LINE %q #%d\n", line[0].Token, line[0].Start.Byte) + } + xcom.Before = append(xcom.Before, line[0]) + line = line[1:] + } + } + + // Remaining line comments go at end of file. + in.file.After = append(in.file.After, line...) + + if debug { + for _, c := range suffix { + fmt.Fprintf(os.Stderr, "SUFFIX %q :%d:%d #%d\n", c.Token, c.Start.Line, c.Start.LineRune, c.Start.Byte) + } + } + + // Assign suffix comments to syntax immediately before. + for i := len(in.post) - 1; i >= 0; i-- { + x := in.post[i] + + start, end := x.Span() + if debug { + fmt.Fprintf(os.Stderr, "post %T :%d:%d #%d :%d:%d #%d\n", x, start.Line, start.LineRune, start.Byte, end.Line, end.LineRune, end.Byte) + } + + // Do not assign suffix comments to end of line block or whole file. + // Instead assign them to the last element inside. + switch x.(type) { + case *FileSyntax: + continue + } + + // Do not assign suffix comments to something that starts + // on an earlier line, so that in + // + // x ( y + // z ) // comment + // + // we assign the comment to z and not to x ( ... ). + if start.Line != end.Line { + continue + } + xcom := x.Comment() + for len(suffix) > 0 && end.Byte <= suffix[len(suffix)-1].Start.Byte { + if debug { + fmt.Fprintf(os.Stderr, "ASSIGN SUFFIX %q #%d\n", suffix[len(suffix)-1].Token, suffix[len(suffix)-1].Start.Byte) + } + xcom.Suffix = append(xcom.Suffix, suffix[len(suffix)-1]) + suffix = suffix[:len(suffix)-1] + } + } + + // We assigned suffix comments in reverse. + // If multiple suffix comments were appended to the same + // expression node, they are now in reverse. Fix that. + for _, x := range in.post { + reverseComments(x.Comment().Suffix) + } + + // Remaining suffix comments go at beginning of file. + in.file.Before = append(in.file.Before, suffix...) +} + +// reverseComments reverses the []Comment list. +func reverseComments(list []Comment) { + for i, j := 0, len(list)-1; i < j; i, j = i+1, j-1 { + list[i], list[j] = list[j], list[i] + } +} + +func (in *input) parseFile() { + in.file = new(FileSyntax) + var cb *CommentBlock + for { + switch in.peek() { + case '\n': + in.lex() + if cb != nil { + in.file.Stmt = append(in.file.Stmt, cb) + cb = nil + } + case _COMMENT: + tok := in.lex() + if cb == nil { + cb = &CommentBlock{Start: tok.pos} + } + com := cb.Comment() + com.Before = append(com.Before, Comment{Start: tok.pos, Token: tok.text}) + case _EOF: + if cb != nil { + in.file.Stmt = append(in.file.Stmt, cb) + } + return + default: + in.parseStmt() + if cb != nil { + in.file.Stmt[len(in.file.Stmt)-1].Comment().Before = cb.Before + cb = nil + } + } + } +} + +func (in *input) parseStmt() { + tok := in.lex() + start := tok.pos + end := tok.endPos + tokens := []string{tok.text} + for { + tok := in.lex() + switch { + case tok.kind.isEOL(): + in.file.Stmt = append(in.file.Stmt, &Line{ + Start: start, + Token: tokens, + End: end, + }) + return + + case tok.kind == '(': + if next := in.peek(); next.isEOL() { + // Start of block: no more tokens on this line. + in.file.Stmt = append(in.file.Stmt, in.parseLineBlock(start, tokens, tok)) + return + } else if next == ')' { + rparen := in.lex() + if in.peek().isEOL() { + // Empty block. + in.lex() + in.file.Stmt = append(in.file.Stmt, &LineBlock{ + Start: start, + Token: tokens, + LParen: LParen{Pos: tok.pos}, + RParen: RParen{Pos: rparen.pos}, + }) + return + } + // '( )' in the middle of the line, not a block. + tokens = append(tokens, tok.text, rparen.text) + } else { + // '(' in the middle of the line, not a block. + tokens = append(tokens, tok.text) + } + + default: + tokens = append(tokens, tok.text) + end = tok.endPos + } + } +} + +func (in *input) parseLineBlock(start Position, token []string, lparen token) *LineBlock { + x := &LineBlock{ + Start: start, + Token: token, + LParen: LParen{Pos: lparen.pos}, + } + var comments []Comment + for { + switch in.peek() { + case _EOLCOMMENT: + // Suffix comment, will be attached later by assignComments. + in.lex() + case '\n': + // Blank line. Add an empty comment to preserve it. + in.lex() + if len(comments) == 0 && len(x.Line) > 0 || len(comments) > 0 && comments[len(comments)-1].Token != "" { + comments = append(comments, Comment{}) + } + case _COMMENT: + tok := in.lex() + comments = append(comments, Comment{Start: tok.pos, Token: tok.text}) + case _EOF: + in.Error(fmt.Sprintf("syntax error (unterminated block started at %s:%d:%d)", in.filename, x.Start.Line, x.Start.LineRune)) + case ')': + rparen := in.lex() + // Don't preserve blank lines (denoted by a single empty comment, added above) + // at the end of the block. + if len(comments) == 1 && comments[0] == (Comment{}) { + comments = nil + } + x.RParen.Before = comments + x.RParen.Pos = rparen.pos + if !in.peek().isEOL() { + in.Error("syntax error (expected newline after closing paren)") + } + in.lex() + return x + default: + l := in.parseLine() + x.Line = append(x.Line, l) + l.Comment().Before = comments + comments = nil + } + } +} + +func (in *input) parseLine() *Line { + tok := in.lex() + if tok.kind.isEOL() { + in.Error("internal parse error: parseLine at end of line") + } + start := tok.pos + end := tok.endPos + tokens := []string{tok.text} + for { + tok := in.lex() + if tok.kind.isEOL() { + return &Line{ + Start: start, + Token: tokens, + End: end, + InBlock: true, + } + } + tokens = append(tokens, tok.text) + end = tok.endPos + } +} + +var ( + slashSlash = []byte("//") + moduleStr = []byte("module") +) + +// ModulePath returns the module path from the gomod file text. +// If it cannot find a module path, it returns an empty string. +// It is tolerant of unrelated problems in the go.mod file. +func ModulePath(mod []byte) string { + for len(mod) > 0 { + line := mod + mod = nil + if i := bytes.IndexByte(line, '\n'); i >= 0 { + line, mod = line[:i], line[i+1:] + } + if i := bytes.Index(line, slashSlash); i >= 0 { + line = line[:i] + } + line = bytes.TrimSpace(line) + if !bytes.HasPrefix(line, moduleStr) { + continue + } + line = line[len(moduleStr):] + n := len(line) + line = bytes.TrimSpace(line) + if len(line) == n || len(line) == 0 { + continue + } + + if line[0] == '"' || line[0] == '`' { + p, err := strconv.Unquote(string(line)) + if err != nil { + return "" // malformed quoted string or multiline module path + } + return p + } + + return string(line) + } + return "" // missing module path +} diff --git a/backend/vendor/golang.org/x/mod/modfile/rule.go b/backend/vendor/golang.org/x/mod/modfile/rule.go new file mode 100644 index 0000000..a86ee4f --- /dev/null +++ b/backend/vendor/golang.org/x/mod/modfile/rule.go @@ -0,0 +1,1904 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package modfile implements a parser and formatter for go.mod files. +// +// The go.mod syntax is described in +// https://pkg.go.dev/cmd/go/#hdr-The_go_mod_file. +// +// The [Parse] and [ParseLax] functions both parse a go.mod file and return an +// abstract syntax tree. ParseLax ignores unknown statements and may be used to +// parse go.mod files that may have been developed with newer versions of Go. +// +// The [File] struct returned by Parse and ParseLax represent an abstract +// go.mod file. File has several methods like [File.AddNewRequire] and +// [File.DropReplace] that can be used to programmatically edit a file. +// +// The [Format] function formats a File back to a byte slice which can be +// written to a file. +package modfile + +import ( + "cmp" + "errors" + "fmt" + "path/filepath" + "slices" + "strconv" + "strings" + "unicode" + + "golang.org/x/mod/internal/lazyregexp" + "golang.org/x/mod/module" + "golang.org/x/mod/semver" +) + +// A File is the parsed, interpreted form of a go.mod file. +type File struct { + Module *Module + Go *Go + Toolchain *Toolchain + Godebug []*Godebug + Require []*Require + Exclude []*Exclude + Replace []*Replace + Retract []*Retract + Tool []*Tool + Ignore []*Ignore + + Syntax *FileSyntax +} + +// A Module is the module statement. +type Module struct { + Mod module.Version + Deprecated string + Syntax *Line +} + +// A Go is the go statement. +type Go struct { + Version string // "1.23" + Syntax *Line +} + +// A Toolchain is the toolchain statement. +type Toolchain struct { + Name string // "go1.21rc1" + Syntax *Line +} + +// A Godebug is a single godebug key=value statement. +type Godebug struct { + Key string + Value string + Syntax *Line +} + +// An Exclude is a single exclude statement. +type Exclude struct { + Mod module.Version + Syntax *Line +} + +// A Replace is a single replace statement. +type Replace struct { + Old module.Version + New module.Version + Syntax *Line +} + +// A Retract is a single retract statement. +type Retract struct { + VersionInterval + Rationale string + Syntax *Line +} + +// A Tool is a single tool statement. +type Tool struct { + Path string + Syntax *Line +} + +// An Ignore is a single ignore statement. +type Ignore struct { + Path string + Syntax *Line +} + +// A VersionInterval represents a range of versions with upper and lower bounds. +// Intervals are closed: both bounds are included. When Low is equal to High, +// the interval may refer to a single version ('v1.2.3') or an interval +// ('[v1.2.3, v1.2.3]'); both have the same representation. +type VersionInterval struct { + Low, High string +} + +// A Require is a single require statement. +type Require struct { + Mod module.Version + Indirect bool // has "// indirect" comment + Syntax *Line +} + +func (r *Require) markRemoved() { + r.Syntax.markRemoved() + *r = Require{} +} + +func (r *Require) setVersion(v string) { + r.Mod.Version = v + + if line := r.Syntax; len(line.Token) > 0 { + if line.InBlock { + // If the line is preceded by an empty line, remove it; see + // https://golang.org/issue/33779. + if len(line.Comments.Before) == 1 && len(line.Comments.Before[0].Token) == 0 { + line.Comments.Before = line.Comments.Before[:0] + } + if len(line.Token) >= 2 { // example.com v1.2.3 + line.Token[1] = v + } + } else { + if len(line.Token) >= 3 { // require example.com v1.2.3 + line.Token[2] = v + } + } + } +} + +// setIndirect sets line to have (or not have) a "// indirect" comment. +func (r *Require) setIndirect(indirect bool) { + r.Indirect = indirect + line := r.Syntax + if isIndirect(line) == indirect { + return + } + if indirect { + // Adding comment. + if len(line.Suffix) == 0 { + // New comment. + line.Suffix = []Comment{{Token: "// indirect", Suffix: true}} + return + } + + com := &line.Suffix[0] + text := strings.TrimSpace(strings.TrimPrefix(com.Token, string(slashSlash))) + if text == "" { + // Empty comment. + com.Token = "// indirect" + return + } + + // Insert at beginning of existing comment. + com.Token = "// indirect; " + text + return + } + + // Removing comment. + f := strings.TrimSpace(strings.TrimPrefix(line.Suffix[0].Token, string(slashSlash))) + if f == "indirect" { + // Remove whole comment. + line.Suffix = nil + return + } + + // Remove comment prefix. + com := &line.Suffix[0] + i := strings.Index(com.Token, "indirect;") + com.Token = "//" + com.Token[i+len("indirect;"):] +} + +// isIndirect reports whether line has a "// indirect" comment, +// meaning it is in go.mod only for its effect on indirect dependencies, +// so that it can be dropped entirely once the effective version of the +// indirect dependency reaches the given minimum version. +func isIndirect(line *Line) bool { + if len(line.Suffix) == 0 { + return false + } + f := strings.Fields(strings.TrimPrefix(line.Suffix[0].Token, string(slashSlash))) + return (len(f) == 1 && f[0] == "indirect" || len(f) > 1 && f[0] == "indirect;") +} + +func (f *File) AddModuleStmt(path string) error { + if f.Syntax == nil { + f.Syntax = new(FileSyntax) + } + if f.Module == nil { + f.Module = &Module{ + Mod: module.Version{Path: path}, + Syntax: f.Syntax.addLine(nil, "module", AutoQuote(path)), + } + } else { + f.Module.Mod.Path = path + f.Syntax.updateLine(f.Module.Syntax, "module", AutoQuote(path)) + } + return nil +} + +func (f *File) AddComment(text string) { + if f.Syntax == nil { + f.Syntax = new(FileSyntax) + } + f.Syntax.Stmt = append(f.Syntax.Stmt, &CommentBlock{ + Comments: Comments{ + Before: []Comment{ + { + Token: text, + }, + }, + }, + }) +} + +type VersionFixer func(path, version string) (string, error) + +// errDontFix is returned by a VersionFixer to indicate the version should be +// left alone, even if it's not canonical. +var dontFixRetract VersionFixer = func(_, vers string) (string, error) { + return vers, nil +} + +// Parse parses and returns a go.mod file. +// +// file is the name of the file, used in positions and errors. +// +// data is the content of the file. +// +// fix is an optional function that canonicalizes module versions. +// If fix is nil, all module versions must be canonical ([module.CanonicalVersion] +// must return the same string). +func Parse(file string, data []byte, fix VersionFixer) (*File, error) { + return parseToFile(file, data, fix, true) +} + +// ParseLax is like Parse but ignores unknown statements. +// It is used when parsing go.mod files other than the main module, +// under the theory that most statement types we add in the future will +// only apply in the main module, like exclude and replace, +// and so we get better gradual deployments if old go commands +// simply ignore those statements when found in go.mod files +// in dependencies. +func ParseLax(file string, data []byte, fix VersionFixer) (*File, error) { + return parseToFile(file, data, fix, false) +} + +func parseToFile(file string, data []byte, fix VersionFixer, strict bool) (parsed *File, err error) { + fs, err := parse(file, data) + if err != nil { + return nil, err + } + f := &File{ + Syntax: fs, + } + var errs ErrorList + + // fix versions in retract directives after the file is parsed. + // We need the module path to fix versions, and it might be at the end. + defer func() { + oldLen := len(errs) + f.fixRetract(fix, &errs) + if len(errs) > oldLen { + parsed, err = nil, errs + } + }() + + for _, x := range fs.Stmt { + switch x := x.(type) { + case *Line: + f.add(&errs, nil, x, x.Token[0], x.Token[1:], fix, strict) + + case *LineBlock: + if len(x.Token) > 1 { + if strict { + errs = append(errs, Error{ + Filename: file, + Pos: x.Start, + Err: fmt.Errorf("unknown block type: %s", strings.Join(x.Token, " ")), + }) + } + continue + } + switch x.Token[0] { + default: + if strict { + errs = append(errs, Error{ + Filename: file, + Pos: x.Start, + Err: fmt.Errorf("unknown block type: %s", strings.Join(x.Token, " ")), + }) + } + continue + case "module", "godebug", "require", "exclude", "replace", "retract", "tool", "ignore": + for _, l := range x.Line { + f.add(&errs, x, l, x.Token[0], l.Token, fix, strict) + } + } + } + } + + if len(errs) > 0 { + return nil, errs + } + return f, nil +} + +var GoVersionRE = lazyregexp.New(`^([1-9][0-9]*)\.(0|[1-9][0-9]*)(\.(0|[1-9][0-9]*))?([a-z]+[0-9]+)?$`) +var laxGoVersionRE = lazyregexp.New(`^v?(([1-9][0-9]*)\.(0|[1-9][0-9]*))([^0-9].*)$`) + +// Toolchains must be named beginning with `go1`, +// like "go1.20.3" or "go1.20.3-gccgo". As a special case, "default" is also permitted. +// Note that this regexp is a much looser condition than go/version.IsValid, +// for forward compatibility. +// (This code has to be work to identify new toolchains even if we tweak the syntax in the future.) +var ToolchainRE = lazyregexp.New(`^default$|^go1($|\.)`) + +func (f *File) add(errs *ErrorList, block *LineBlock, line *Line, verb string, args []string, fix VersionFixer, strict bool) { + // If strict is false, this module is a dependency. + // We ignore all unknown directives as well as main-module-only + // directives like replace and exclude. It will work better for + // forward compatibility if we can depend on modules that have unknown + // statements (presumed relevant only when acting as the main module) + // and simply ignore those statements. + if !strict { + switch verb { + case "go", "module", "retract", "require", "ignore": + // want these even for dependency go.mods + default: + return + } + } + + wrapModPathError := func(modPath string, err error) { + *errs = append(*errs, Error{ + Filename: f.Syntax.Name, + Pos: line.Start, + ModPath: modPath, + Verb: verb, + Err: err, + }) + } + wrapError := func(err error) { + *errs = append(*errs, Error{ + Filename: f.Syntax.Name, + Pos: line.Start, + Err: err, + }) + } + errorf := func(format string, args ...interface{}) { + wrapError(fmt.Errorf(format, args...)) + } + + switch verb { + default: + errorf("unknown directive: %s", verb) + + case "go": + if f.Go != nil { + errorf("repeated go statement") + return + } + if len(args) != 1 { + errorf("go directive expects exactly one argument") + return + } else if !GoVersionRE.MatchString(args[0]) { + fixed := false + if !strict { + if m := laxGoVersionRE.FindStringSubmatch(args[0]); m != nil { + args[0] = m[1] + fixed = true + } + } + if !fixed { + errorf("invalid go version '%s': must match format 1.23.0", args[0]) + return + } + } + + f.Go = &Go{Syntax: line} + f.Go.Version = args[0] + + case "toolchain": + if f.Toolchain != nil { + errorf("repeated toolchain statement") + return + } + if len(args) != 1 { + errorf("toolchain directive expects exactly one argument") + return + } else if !ToolchainRE.MatchString(args[0]) { + errorf("invalid toolchain version '%s': must match format go1.23.0 or default", args[0]) + return + } + f.Toolchain = &Toolchain{Syntax: line} + f.Toolchain.Name = args[0] + + case "module": + if f.Module != nil { + errorf("repeated module statement") + return + } + deprecated := parseDeprecation(block, line) + f.Module = &Module{ + Syntax: line, + Deprecated: deprecated, + } + if len(args) != 1 { + errorf("usage: module module/path") + return + } + s, err := parseString(&args[0]) + if err != nil { + errorf("invalid quoted string: %v", err) + return + } + f.Module.Mod = module.Version{Path: s} + + case "godebug": + if len(args) != 1 || strings.ContainsAny(args[0], "\"`',") { + errorf("usage: godebug key=value") + return + } + key, value, ok := strings.Cut(args[0], "=") + if !ok { + errorf("usage: godebug key=value") + return + } + f.Godebug = append(f.Godebug, &Godebug{ + Key: key, + Value: value, + Syntax: line, + }) + + case "require", "exclude": + if len(args) != 2 { + errorf("usage: %s module/path v1.2.3", verb) + return + } + s, err := parseString(&args[0]) + if err != nil { + errorf("invalid quoted string: %v", err) + return + } + v, err := parseVersion(verb, s, &args[1], fix) + if err != nil { + wrapError(err) + return + } + pathMajor, err := modulePathMajor(s) + if err != nil { + wrapError(err) + return + } + if err := module.CheckPathMajor(v, pathMajor); err != nil { + wrapModPathError(s, err) + return + } + if verb == "require" { + f.Require = append(f.Require, &Require{ + Mod: module.Version{Path: s, Version: v}, + Syntax: line, + Indirect: isIndirect(line), + }) + } else { + f.Exclude = append(f.Exclude, &Exclude{ + Mod: module.Version{Path: s, Version: v}, + Syntax: line, + }) + } + + case "replace": + replace, wrappederr := parseReplace(f.Syntax.Name, line, verb, args, fix) + if wrappederr != nil { + *errs = append(*errs, *wrappederr) + return + } + f.Replace = append(f.Replace, replace) + + case "retract": + rationale := parseDirectiveComment(block, line) + vi, err := parseVersionInterval(verb, "", &args, dontFixRetract) + if err != nil { + if strict { + wrapError(err) + return + } else { + // Only report errors parsing intervals in the main module. We may + // support additional syntax in the future, such as open and half-open + // intervals. Those can't be supported now, because they break the + // go.mod parser, even in lax mode. + return + } + } + if len(args) > 0 && strict { + // In the future, there may be additional information after the version. + errorf("unexpected token after version: %q", args[0]) + return + } + retract := &Retract{ + VersionInterval: vi, + Rationale: rationale, + Syntax: line, + } + f.Retract = append(f.Retract, retract) + + case "tool": + if len(args) != 1 { + errorf("tool directive expects exactly one argument") + return + } + s, err := parseString(&args[0]) + if err != nil { + errorf("invalid quoted string: %v", err) + return + } + f.Tool = append(f.Tool, &Tool{ + Path: s, + Syntax: line, + }) + + case "ignore": + if len(args) != 1 { + errorf("ignore directive expects exactly one argument") + return + } + s, err := parseString(&args[0]) + if err != nil { + errorf("invalid quoted string: %v", err) + return + } + f.Ignore = append(f.Ignore, &Ignore{ + Path: s, + Syntax: line, + }) + } +} + +func parseReplace(filename string, line *Line, verb string, args []string, fix VersionFixer) (*Replace, *Error) { + wrapModPathError := func(modPath string, err error) *Error { + return &Error{ + Filename: filename, + Pos: line.Start, + ModPath: modPath, + Verb: verb, + Err: err, + } + } + wrapError := func(err error) *Error { + return &Error{ + Filename: filename, + Pos: line.Start, + Err: err, + } + } + errorf := func(format string, args ...interface{}) *Error { + return wrapError(fmt.Errorf(format, args...)) + } + + arrow := 2 + if len(args) >= 2 && args[1] == "=>" { + arrow = 1 + } + if len(args) < arrow+2 || len(args) > arrow+3 || args[arrow] != "=>" { + return nil, errorf("usage: %s module/path [v1.2.3] => other/module v1.4\n\t or %s module/path [v1.2.3] => ../local/directory", verb, verb) + } + s, err := parseString(&args[0]) + if err != nil { + return nil, errorf("invalid quoted string: %v", err) + } + pathMajor, err := modulePathMajor(s) + if err != nil { + return nil, wrapModPathError(s, err) + + } + var v string + if arrow == 2 { + v, err = parseVersion(verb, s, &args[1], fix) + if err != nil { + return nil, wrapError(err) + } + if err := module.CheckPathMajor(v, pathMajor); err != nil { + return nil, wrapModPathError(s, err) + } + } + ns, err := parseString(&args[arrow+1]) + if err != nil { + return nil, errorf("invalid quoted string: %v", err) + } + nv := "" + if len(args) == arrow+2 { + if !IsDirectoryPath(ns) { + if strings.Contains(ns, "@") { + return nil, errorf("replacement module must match format 'path version', not 'path@version'") + } + return nil, errorf("replacement module without version must be directory path (rooted or starting with . or ..)") + } + if filepath.Separator == '/' && strings.Contains(ns, `\`) { + return nil, errorf("replacement directory appears to be Windows path (on a non-windows system)") + } + } + if len(args) == arrow+3 { + nv, err = parseVersion(verb, ns, &args[arrow+2], fix) + if err != nil { + return nil, wrapError(err) + } + if IsDirectoryPath(ns) { + return nil, errorf("replacement module directory path %q cannot have version", ns) + } + } + return &Replace{ + Old: module.Version{Path: s, Version: v}, + New: module.Version{Path: ns, Version: nv}, + Syntax: line, + }, nil +} + +// fixRetract applies fix to each retract directive in f, appending any errors +// to errs. +// +// Most versions are fixed as we parse the file, but for retract directives, +// the relevant module path is the one specified with the module directive, +// and that might appear at the end of the file (or not at all). +func (f *File) fixRetract(fix VersionFixer, errs *ErrorList) { + if fix == nil { + return + } + path := "" + if f.Module != nil { + path = f.Module.Mod.Path + } + var r *Retract + wrapError := func(err error) { + *errs = append(*errs, Error{ + Filename: f.Syntax.Name, + Pos: r.Syntax.Start, + Err: err, + }) + } + + for _, r = range f.Retract { + if path == "" { + wrapError(errors.New("no module directive found, so retract cannot be used")) + return // only print the first one of these + } + + args := r.Syntax.Token + if args[0] == "retract" { + args = args[1:] + } + vi, err := parseVersionInterval("retract", path, &args, fix) + if err != nil { + wrapError(err) + } + r.VersionInterval = vi + } +} + +func (f *WorkFile) add(errs *ErrorList, line *Line, verb string, args []string, fix VersionFixer) { + wrapError := func(err error) { + *errs = append(*errs, Error{ + Filename: f.Syntax.Name, + Pos: line.Start, + Err: err, + }) + } + errorf := func(format string, args ...interface{}) { + wrapError(fmt.Errorf(format, args...)) + } + + switch verb { + default: + errorf("unknown directive: %s", verb) + + case "go": + if f.Go != nil { + errorf("repeated go statement") + return + } + if len(args) != 1 { + errorf("go directive expects exactly one argument") + return + } else if !GoVersionRE.MatchString(args[0]) { + errorf("invalid go version '%s': must match format 1.23.0", args[0]) + return + } + + f.Go = &Go{Syntax: line} + f.Go.Version = args[0] + + case "toolchain": + if f.Toolchain != nil { + errorf("repeated toolchain statement") + return + } + if len(args) != 1 { + errorf("toolchain directive expects exactly one argument") + return + } else if !ToolchainRE.MatchString(args[0]) { + errorf("invalid toolchain version '%s': must match format go1.23.0 or default", args[0]) + return + } + + f.Toolchain = &Toolchain{Syntax: line} + f.Toolchain.Name = args[0] + + case "godebug": + if len(args) != 1 || strings.ContainsAny(args[0], "\"`',") { + errorf("usage: godebug key=value") + return + } + key, value, ok := strings.Cut(args[0], "=") + if !ok { + errorf("usage: godebug key=value") + return + } + f.Godebug = append(f.Godebug, &Godebug{ + Key: key, + Value: value, + Syntax: line, + }) + + case "use": + if len(args) != 1 { + errorf("usage: %s local/dir", verb) + return + } + s, err := parseString(&args[0]) + if err != nil { + errorf("invalid quoted string: %v", err) + return + } + f.Use = append(f.Use, &Use{ + Path: s, + Syntax: line, + }) + + case "replace": + replace, wrappederr := parseReplace(f.Syntax.Name, line, verb, args, fix) + if wrappederr != nil { + *errs = append(*errs, *wrappederr) + return + } + f.Replace = append(f.Replace, replace) + } +} + +// IsDirectoryPath reports whether the given path should be interpreted as a directory path. +// Just like on the go command line, relative paths starting with a '.' or '..' path component +// and rooted paths are directory paths; the rest are module paths. +func IsDirectoryPath(ns string) bool { + // Because go.mod files can move from one system to another, + // we check all known path syntaxes, both Unix and Windows. + return ns == "." || strings.HasPrefix(ns, "./") || strings.HasPrefix(ns, `.\`) || + ns == ".." || strings.HasPrefix(ns, "../") || strings.HasPrefix(ns, `..\`) || + strings.HasPrefix(ns, "/") || strings.HasPrefix(ns, `\`) || + len(ns) >= 2 && ('A' <= ns[0] && ns[0] <= 'Z' || 'a' <= ns[0] && ns[0] <= 'z') && ns[1] == ':' +} + +// MustQuote reports whether s must be quoted in order to appear as +// a single token in a go.mod line. +func MustQuote(s string) bool { + for _, r := range s { + switch r { + case ' ', '"', '\'', '`': + return true + + case '(', ')', '[', ']', '{', '}', ',': + if len(s) > 1 { + return true + } + + default: + if !unicode.IsPrint(r) { + return true + } + } + } + return s == "" || strings.Contains(s, "//") || strings.Contains(s, "/*") +} + +// AutoQuote returns s or, if quoting is required for s to appear in a go.mod, +// the quotation of s. +func AutoQuote(s string) string { + if MustQuote(s) { + return strconv.Quote(s) + } + return s +} + +func parseVersionInterval(verb string, path string, args *[]string, fix VersionFixer) (VersionInterval, error) { + toks := *args + if len(toks) == 0 || toks[0] == "(" { + return VersionInterval{}, fmt.Errorf("expected '[' or version") + } + if toks[0] != "[" { + v, err := parseVersion(verb, path, &toks[0], fix) + if err != nil { + return VersionInterval{}, err + } + *args = toks[1:] + return VersionInterval{Low: v, High: v}, nil + } + toks = toks[1:] + + if len(toks) == 0 { + return VersionInterval{}, fmt.Errorf("expected version after '['") + } + low, err := parseVersion(verb, path, &toks[0], fix) + if err != nil { + return VersionInterval{}, err + } + toks = toks[1:] + + if len(toks) == 0 || toks[0] != "," { + return VersionInterval{}, fmt.Errorf("expected ',' after version") + } + toks = toks[1:] + + if len(toks) == 0 { + return VersionInterval{}, fmt.Errorf("expected version after ','") + } + high, err := parseVersion(verb, path, &toks[0], fix) + if err != nil { + return VersionInterval{}, err + } + toks = toks[1:] + + if len(toks) == 0 || toks[0] != "]" { + return VersionInterval{}, fmt.Errorf("expected ']' after version") + } + toks = toks[1:] + + *args = toks + return VersionInterval{Low: low, High: high}, nil +} + +func parseString(s *string) (string, error) { + t := *s + if strings.HasPrefix(t, `"`) { + var err error + if t, err = strconv.Unquote(t); err != nil { + return "", err + } + } else if strings.ContainsAny(t, "\"'`") { + // Other quotes are reserved both for possible future expansion + // and to avoid confusion. For example if someone types 'x' + // we want that to be a syntax error and not a literal x in literal quotation marks. + return "", fmt.Errorf("unquoted string cannot contain quote") + } + *s = AutoQuote(t) + return t, nil +} + +var deprecatedRE = lazyregexp.New(`(?s)(?:^|\n\n)Deprecated: *(.*?)(?:$|\n\n)`) + +// parseDeprecation extracts the text of comments on a "module" directive and +// extracts a deprecation message from that. +// +// A deprecation message is contained in a paragraph within a block of comments +// that starts with "Deprecated:" (case sensitive). The message runs until the +// end of the paragraph and does not include the "Deprecated:" prefix. If the +// comment block has multiple paragraphs that start with "Deprecated:", +// parseDeprecation returns the message from the first. +func parseDeprecation(block *LineBlock, line *Line) string { + text := parseDirectiveComment(block, line) + m := deprecatedRE.FindStringSubmatch(text) + if m == nil { + return "" + } + return m[1] +} + +// parseDirectiveComment extracts the text of comments on a directive. +// If the directive's line does not have comments and is part of a block that +// does have comments, the block's comments are used. +func parseDirectiveComment(block *LineBlock, line *Line) string { + comments := line.Comment() + if block != nil && len(comments.Before) == 0 && len(comments.Suffix) == 0 { + comments = block.Comment() + } + groups := [][]Comment{comments.Before, comments.Suffix} + var lines []string + for _, g := range groups { + for _, c := range g { + if !strings.HasPrefix(c.Token, "//") { + continue // blank line + } + lines = append(lines, strings.TrimSpace(strings.TrimPrefix(c.Token, "//"))) + } + } + return strings.Join(lines, "\n") +} + +type ErrorList []Error + +func (e ErrorList) Error() string { + errStrs := make([]string, len(e)) + for i, err := range e { + errStrs[i] = err.Error() + } + return strings.Join(errStrs, "\n") +} + +type Error struct { + Filename string + Pos Position + Verb string + ModPath string + Err error +} + +func (e *Error) Error() string { + var pos string + if e.Pos.LineRune > 1 { + // Don't print LineRune if it's 1 (beginning of line). + // It's always 1 except in scanner errors, which are rare. + pos = fmt.Sprintf("%s:%d:%d: ", e.Filename, e.Pos.Line, e.Pos.LineRune) + } else if e.Pos.Line > 0 { + pos = fmt.Sprintf("%s:%d: ", e.Filename, e.Pos.Line) + } else if e.Filename != "" { + pos = fmt.Sprintf("%s: ", e.Filename) + } + + var directive string + if e.ModPath != "" { + directive = fmt.Sprintf("%s %s: ", e.Verb, e.ModPath) + } else if e.Verb != "" { + directive = fmt.Sprintf("%s: ", e.Verb) + } + + return pos + directive + e.Err.Error() +} + +func (e *Error) Unwrap() error { return e.Err } + +func parseVersion(verb string, path string, s *string, fix VersionFixer) (string, error) { + t, err := parseString(s) + if err != nil { + return "", &Error{ + Verb: verb, + ModPath: path, + Err: &module.InvalidVersionError{ + Version: *s, + Err: err, + }, + } + } + if fix != nil { + fixed, err := fix(path, t) + if err != nil { + if err, ok := err.(*module.ModuleError); ok { + return "", &Error{ + Verb: verb, + ModPath: path, + Err: err.Err, + } + } + return "", err + } + t = fixed + } else { + cv := module.CanonicalVersion(t) + if cv == "" { + return "", &Error{ + Verb: verb, + ModPath: path, + Err: &module.InvalidVersionError{ + Version: t, + Err: errors.New("must be of the form v1.2.3"), + }, + } + } + t = cv + } + *s = t + return *s, nil +} + +func modulePathMajor(path string) (string, error) { + _, major, ok := module.SplitPathVersion(path) + if !ok { + return "", fmt.Errorf("invalid module path") + } + return major, nil +} + +func (f *File) Format() ([]byte, error) { + return Format(f.Syntax), nil +} + +// Cleanup cleans up the file f after any edit operations. +// To avoid quadratic behavior, modifications like [File.DropRequire] +// clear the entry but do not remove it from the slice. +// Cleanup cleans out all the cleared entries. +func (f *File) Cleanup() { + w := 0 + for _, g := range f.Godebug { + if g.Key != "" { + f.Godebug[w] = g + w++ + } + } + f.Godebug = f.Godebug[:w] + + w = 0 + for _, r := range f.Require { + if r.Mod.Path != "" { + f.Require[w] = r + w++ + } + } + f.Require = f.Require[:w] + + w = 0 + for _, x := range f.Exclude { + if x.Mod.Path != "" { + f.Exclude[w] = x + w++ + } + } + f.Exclude = f.Exclude[:w] + + w = 0 + for _, r := range f.Replace { + if r.Old.Path != "" { + f.Replace[w] = r + w++ + } + } + f.Replace = f.Replace[:w] + + w = 0 + for _, r := range f.Retract { + if r.Low != "" || r.High != "" { + f.Retract[w] = r + w++ + } + } + f.Retract = f.Retract[:w] + + f.Syntax.Cleanup() +} + +func (f *File) AddGoStmt(version string) error { + if !GoVersionRE.MatchString(version) { + return fmt.Errorf("invalid language version %q", version) + } + if f.Go == nil { + var hint Expr + if f.Module != nil && f.Module.Syntax != nil { + hint = f.Module.Syntax + } else if f.Syntax == nil { + f.Syntax = new(FileSyntax) + } + f.Go = &Go{ + Version: version, + Syntax: f.Syntax.addLine(hint, "go", version), + } + } else { + f.Go.Version = version + f.Syntax.updateLine(f.Go.Syntax, "go", version) + } + return nil +} + +// DropGoStmt deletes the go statement from the file. +func (f *File) DropGoStmt() { + if f.Go != nil { + f.Go.Syntax.markRemoved() + f.Go = nil + } +} + +// DropToolchainStmt deletes the toolchain statement from the file. +func (f *File) DropToolchainStmt() { + if f.Toolchain != nil { + f.Toolchain.Syntax.markRemoved() + f.Toolchain = nil + } +} + +func (f *File) AddToolchainStmt(name string) error { + if !ToolchainRE.MatchString(name) { + return fmt.Errorf("invalid toolchain name %q", name) + } + if f.Toolchain == nil { + var hint Expr + if f.Go != nil && f.Go.Syntax != nil { + hint = f.Go.Syntax + } else if f.Module != nil && f.Module.Syntax != nil { + hint = f.Module.Syntax + } + f.Toolchain = &Toolchain{ + Name: name, + Syntax: f.Syntax.addLine(hint, "toolchain", name), + } + } else { + f.Toolchain.Name = name + f.Syntax.updateLine(f.Toolchain.Syntax, "toolchain", name) + } + return nil +} + +// AddGodebug sets the first godebug line for key to value, +// preserving any existing comments for that line and removing all +// other godebug lines for key. +// +// If no line currently exists for key, AddGodebug adds a new line +// at the end of the last godebug block. +func (f *File) AddGodebug(key, value string) error { + need := true + for _, g := range f.Godebug { + if g.Key == key { + if need { + g.Value = value + f.Syntax.updateLine(g.Syntax, "godebug", key+"="+value) + need = false + } else { + g.Syntax.markRemoved() + *g = Godebug{} + } + } + } + + if need { + f.addNewGodebug(key, value) + } + return nil +} + +// addNewGodebug adds a new godebug key=value line at the end +// of the last godebug block, regardless of any existing godebug lines for key. +func (f *File) addNewGodebug(key, value string) { + line := f.Syntax.addLine(nil, "godebug", key+"="+value) + g := &Godebug{ + Key: key, + Value: value, + Syntax: line, + } + f.Godebug = append(f.Godebug, g) +} + +// AddRequire sets the first require line for path to version vers, +// preserving any existing comments for that line and removing all +// other lines for path. +// +// If no line currently exists for path, AddRequire adds a new line +// at the end of the last require block. +func (f *File) AddRequire(path, vers string) error { + need := true + for _, r := range f.Require { + if r.Mod.Path == path { + if need { + r.Mod.Version = vers + f.Syntax.updateLine(r.Syntax, "require", AutoQuote(path), vers) + need = false + } else { + r.Syntax.markRemoved() + *r = Require{} + } + } + } + + if need { + f.AddNewRequire(path, vers, false) + } + return nil +} + +// AddNewRequire adds a new require line for path at version vers at the end of +// the last require block, regardless of any existing require lines for path. +func (f *File) AddNewRequire(path, vers string, indirect bool) { + line := f.Syntax.addLine(nil, "require", AutoQuote(path), vers) + r := &Require{ + Mod: module.Version{Path: path, Version: vers}, + Syntax: line, + } + r.setIndirect(indirect) + f.Require = append(f.Require, r) +} + +// SetRequire updates the requirements of f to contain exactly req, preserving +// the existing block structure and line comment contents (except for 'indirect' +// markings) for the first requirement on each named module path. +// +// The Syntax field is ignored for the requirements in req. +// +// Any requirements not already present in the file are added to the block +// containing the last require line. +// +// The requirements in req must specify at most one distinct version for each +// module path. +// +// If any existing requirements may be removed, the caller should call +// [File.Cleanup] after all edits are complete. +func (f *File) SetRequire(req []*Require) { + type elem struct { + version string + indirect bool + } + need := make(map[string]elem) + for _, r := range req { + if prev, dup := need[r.Mod.Path]; dup && prev.version != r.Mod.Version { + panic(fmt.Errorf("SetRequire called with conflicting versions for path %s (%s and %s)", r.Mod.Path, prev.version, r.Mod.Version)) + } + need[r.Mod.Path] = elem{r.Mod.Version, r.Indirect} + } + + // Update or delete the existing Require entries to preserve + // only the first for each module path in req. + for _, r := range f.Require { + e, ok := need[r.Mod.Path] + if ok { + r.setVersion(e.version) + r.setIndirect(e.indirect) + } else { + r.markRemoved() + } + delete(need, r.Mod.Path) + } + + // Add new entries in the last block of the file for any paths that weren't + // already present. + // + // This step is nondeterministic, but the final result will be deterministic + // because we will sort the block. + for path, e := range need { + f.AddNewRequire(path, e.version, e.indirect) + } + + f.SortBlocks() +} + +// SetRequireSeparateIndirect updates the requirements of f to contain the given +// requirements. Comment contents (except for 'indirect' markings) are retained +// from the first existing requirement for each module path. Like SetRequire, +// SetRequireSeparateIndirect adds requirements for new paths in req, +// updates the version and "// indirect" comment on existing requirements, +// and deletes requirements on paths not in req. Existing duplicate requirements +// are deleted. +// +// As its name suggests, SetRequireSeparateIndirect puts direct and indirect +// requirements into two separate blocks, one containing only direct +// requirements, and the other containing only indirect requirements. +// SetRequireSeparateIndirect may move requirements between these two blocks +// when their indirect markings change. However, SetRequireSeparateIndirect +// won't move requirements from other blocks, especially blocks with comments. +// +// If the file initially has one uncommented block of requirements, +// SetRequireSeparateIndirect will split it into a direct-only and indirect-only +// block. This aids in the transition to separate blocks. +func (f *File) SetRequireSeparateIndirect(req []*Require) { + // hasComments returns whether a line or block has comments + // other than "indirect". + hasComments := func(c Comments) bool { + return len(c.Before) > 0 || len(c.After) > 0 || len(c.Suffix) > 1 || + (len(c.Suffix) == 1 && + strings.TrimSpace(strings.TrimPrefix(c.Suffix[0].Token, string(slashSlash))) != "indirect") + } + + // moveReq adds r to block. If r was in another block, moveReq deletes + // it from that block and transfers its comments. + moveReq := func(r *Require, block *LineBlock) { + var line *Line + if r.Syntax == nil { + line = &Line{Token: []string{AutoQuote(r.Mod.Path), r.Mod.Version}} + r.Syntax = line + if r.Indirect { + r.setIndirect(true) + } + } else { + line = new(Line) + *line = *r.Syntax + if !line.InBlock && len(line.Token) > 0 && line.Token[0] == "require" { + line.Token = line.Token[1:] + } + r.Syntax.Token = nil // Cleanup will delete the old line. + r.Syntax = line + } + line.InBlock = true + block.Line = append(block.Line, line) + } + + // Examine existing require lines and blocks. + var ( + // We may insert new requirements into the last uncommented + // direct-only and indirect-only blocks. We may also move requirements + // to the opposite block if their indirect markings change. + lastDirectIndex = -1 + lastIndirectIndex = -1 + + // If there are no direct-only or indirect-only blocks, a new block may + // be inserted after the last require line or block. + lastRequireIndex = -1 + + // If there's only one require line or block, and it's uncommented, + // we'll move its requirements to the direct-only or indirect-only blocks. + requireLineOrBlockCount = 0 + + // Track the block each requirement belongs to (if any) so we can + // move them later. + lineToBlock = make(map[*Line]*LineBlock) + ) + for i, stmt := range f.Syntax.Stmt { + switch stmt := stmt.(type) { + case *Line: + if len(stmt.Token) == 0 || stmt.Token[0] != "require" { + continue + } + lastRequireIndex = i + requireLineOrBlockCount++ + if !hasComments(stmt.Comments) { + if isIndirect(stmt) { + lastIndirectIndex = i + } else { + lastDirectIndex = i + } + } + + case *LineBlock: + if len(stmt.Token) == 0 || stmt.Token[0] != "require" { + continue + } + lastRequireIndex = i + requireLineOrBlockCount++ + allDirect := len(stmt.Line) > 0 && !hasComments(stmt.Comments) + allIndirect := len(stmt.Line) > 0 && !hasComments(stmt.Comments) + for _, line := range stmt.Line { + lineToBlock[line] = stmt + if hasComments(line.Comments) { + allDirect = false + allIndirect = false + } else if isIndirect(line) { + allDirect = false + } else { + allIndirect = false + } + } + if allDirect { + lastDirectIndex = i + } + if allIndirect { + lastIndirectIndex = i + } + } + } + + oneFlatUncommentedBlock := requireLineOrBlockCount == 1 && + !hasComments(*f.Syntax.Stmt[lastRequireIndex].Comment()) + + // Create direct and indirect blocks if needed. Convert lines into blocks + // if needed. If we end up with an empty block or a one-line block, + // Cleanup will delete it or convert it to a line later. + insertBlock := func(i int) *LineBlock { + block := &LineBlock{Token: []string{"require"}} + f.Syntax.Stmt = append(f.Syntax.Stmt, nil) + copy(f.Syntax.Stmt[i+1:], f.Syntax.Stmt[i:]) + f.Syntax.Stmt[i] = block + return block + } + + ensureBlock := func(i int) *LineBlock { + switch stmt := f.Syntax.Stmt[i].(type) { + case *LineBlock: + return stmt + case *Line: + block := &LineBlock{ + Token: []string{"require"}, + Line: []*Line{stmt}, + } + stmt.Token = stmt.Token[1:] // remove "require" + stmt.InBlock = true + f.Syntax.Stmt[i] = block + return block + default: + panic(fmt.Sprintf("unexpected statement: %v", stmt)) + } + } + + var lastDirectBlock *LineBlock + if lastDirectIndex < 0 { + if lastIndirectIndex >= 0 { + lastDirectIndex = lastIndirectIndex + lastIndirectIndex++ + } else if lastRequireIndex >= 0 { + lastDirectIndex = lastRequireIndex + 1 + } else { + lastDirectIndex = len(f.Syntax.Stmt) + } + lastDirectBlock = insertBlock(lastDirectIndex) + } else { + lastDirectBlock = ensureBlock(lastDirectIndex) + } + + var lastIndirectBlock *LineBlock + if lastIndirectIndex < 0 { + lastIndirectIndex = lastDirectIndex + 1 + lastIndirectBlock = insertBlock(lastIndirectIndex) + } else { + lastIndirectBlock = ensureBlock(lastIndirectIndex) + } + + // Delete requirements we don't want anymore. + // Update versions and indirect comments on requirements we want to keep. + // If a requirement is in last{Direct,Indirect}Block with the wrong + // indirect marking after this, or if the requirement is in an single + // uncommented mixed block (oneFlatUncommentedBlock), move it to the + // correct block. + // + // Some blocks may be empty after this. Cleanup will remove them. + need := make(map[string]*Require) + for _, r := range req { + need[r.Mod.Path] = r + } + have := make(map[string]*Require) + for _, r := range f.Require { + path := r.Mod.Path + if need[path] == nil || have[path] != nil { + // Requirement not needed, or duplicate requirement. Delete. + r.markRemoved() + continue + } + have[r.Mod.Path] = r + r.setVersion(need[path].Mod.Version) + r.setIndirect(need[path].Indirect) + if need[path].Indirect && + (oneFlatUncommentedBlock || lineToBlock[r.Syntax] == lastDirectBlock) { + moveReq(r, lastIndirectBlock) + } else if !need[path].Indirect && + (oneFlatUncommentedBlock || lineToBlock[r.Syntax] == lastIndirectBlock) { + moveReq(r, lastDirectBlock) + } + } + + // Add new requirements. + for path, r := range need { + if have[path] == nil { + if r.Indirect { + moveReq(r, lastIndirectBlock) + } else { + moveReq(r, lastDirectBlock) + } + f.Require = append(f.Require, r) + } + } + + f.SortBlocks() +} + +func (f *File) DropGodebug(key string) error { + for _, g := range f.Godebug { + if g.Key == key { + g.Syntax.markRemoved() + *g = Godebug{} + } + } + return nil +} + +func (f *File) DropRequire(path string) error { + for _, r := range f.Require { + if r.Mod.Path == path { + r.Syntax.markRemoved() + *r = Require{} + } + } + return nil +} + +// AddExclude adds a exclude statement to the mod file. Errors if the provided +// version is not a canonical version string +func (f *File) AddExclude(path, vers string) error { + if err := checkCanonicalVersion(path, vers); err != nil { + return err + } + + var hint *Line + for _, x := range f.Exclude { + if x.Mod.Path == path && x.Mod.Version == vers { + return nil + } + if x.Mod.Path == path { + hint = x.Syntax + } + } + + f.Exclude = append(f.Exclude, &Exclude{Mod: module.Version{Path: path, Version: vers}, Syntax: f.Syntax.addLine(hint, "exclude", AutoQuote(path), vers)}) + return nil +} + +func (f *File) DropExclude(path, vers string) error { + for _, x := range f.Exclude { + if x.Mod.Path == path && x.Mod.Version == vers { + x.Syntax.markRemoved() + *x = Exclude{} + } + } + return nil +} + +func (f *File) AddReplace(oldPath, oldVers, newPath, newVers string) error { + return addReplace(f.Syntax, &f.Replace, oldPath, oldVers, newPath, newVers) +} + +func addReplace(syntax *FileSyntax, replace *[]*Replace, oldPath, oldVers, newPath, newVers string) error { + need := true + old := module.Version{Path: oldPath, Version: oldVers} + new := module.Version{Path: newPath, Version: newVers} + tokens := []string{"replace", AutoQuote(oldPath)} + if oldVers != "" { + tokens = append(tokens, oldVers) + } + tokens = append(tokens, "=>", AutoQuote(newPath)) + if newVers != "" { + tokens = append(tokens, newVers) + } + + var hint *Line + for _, r := range *replace { + if r.Old.Path == oldPath && (oldVers == "" || r.Old.Version == oldVers) { + if need { + // Found replacement for old; update to use new. + r.New = new + syntax.updateLine(r.Syntax, tokens...) + need = false + continue + } + // Already added; delete other replacements for same. + r.Syntax.markRemoved() + *r = Replace{} + } + if r.Old.Path == oldPath { + hint = r.Syntax + } + } + if need { + *replace = append(*replace, &Replace{Old: old, New: new, Syntax: syntax.addLine(hint, tokens...)}) + } + return nil +} + +func (f *File) DropReplace(oldPath, oldVers string) error { + for _, r := range f.Replace { + if r.Old.Path == oldPath && r.Old.Version == oldVers { + r.Syntax.markRemoved() + *r = Replace{} + } + } + return nil +} + +// AddRetract adds a retract statement to the mod file. Errors if the provided +// version interval does not consist of canonical version strings +func (f *File) AddRetract(vi VersionInterval, rationale string) error { + var path string + if f.Module != nil { + path = f.Module.Mod.Path + } + if err := checkCanonicalVersion(path, vi.High); err != nil { + return err + } + if err := checkCanonicalVersion(path, vi.Low); err != nil { + return err + } + + r := &Retract{ + VersionInterval: vi, + } + if vi.Low == vi.High { + r.Syntax = f.Syntax.addLine(nil, "retract", AutoQuote(vi.Low)) + } else { + r.Syntax = f.Syntax.addLine(nil, "retract", "[", AutoQuote(vi.Low), ",", AutoQuote(vi.High), "]") + } + if rationale != "" { + for _, line := range strings.Split(rationale, "\n") { + com := Comment{Token: "// " + line} + r.Syntax.Comment().Before = append(r.Syntax.Comment().Before, com) + } + } + return nil +} + +func (f *File) DropRetract(vi VersionInterval) error { + for _, r := range f.Retract { + if r.VersionInterval == vi { + r.Syntax.markRemoved() + *r = Retract{} + } + } + return nil +} + +// AddTool adds a new tool directive with the given path. +// It does nothing if the tool line already exists. +func (f *File) AddTool(path string) error { + for _, t := range f.Tool { + if t.Path == path { + return nil + } + } + + f.Tool = append(f.Tool, &Tool{ + Path: path, + Syntax: f.Syntax.addLine(nil, "tool", path), + }) + + f.SortBlocks() + return nil +} + +// RemoveTool removes a tool directive with the given path. +// It does nothing if no such tool directive exists. +func (f *File) DropTool(path string) error { + for _, t := range f.Tool { + if t.Path == path { + t.Syntax.markRemoved() + *t = Tool{} + } + } + return nil +} + +// AddIgnore adds a new ignore directive with the given path. +// It does nothing if the ignore line already exists. +func (f *File) AddIgnore(path string) error { + for _, t := range f.Ignore { + if t.Path == path { + return nil + } + } + + f.Ignore = append(f.Ignore, &Ignore{ + Path: path, + Syntax: f.Syntax.addLine(nil, "ignore", path), + }) + + f.SortBlocks() + return nil +} + +// DropIgnore removes a ignore directive with the given path. +// It does nothing if no such ignore directive exists. +func (f *File) DropIgnore(path string) error { + for _, t := range f.Ignore { + if t.Path == path { + t.Syntax.markRemoved() + *t = Ignore{} + } + } + return nil +} + +func (f *File) SortBlocks() { + f.removeDups() // otherwise sorting is unsafe + + // semanticSortForExcludeVersionV is the Go version (plus leading "v") at which + // lines in exclude blocks start to use semantic sort instead of lexicographic sort. + // See go.dev/issue/60028. + const semanticSortForExcludeVersionV = "v1.21" + useSemanticSortForExclude := f.Go != nil && semver.Compare("v"+f.Go.Version, semanticSortForExcludeVersionV) >= 0 + + for _, stmt := range f.Syntax.Stmt { + block, ok := stmt.(*LineBlock) + if !ok { + continue + } + less := compareLine + if block.Token[0] == "exclude" && useSemanticSortForExclude { + less = compareLineExclude + } else if block.Token[0] == "retract" { + less = compareLineRetract + } + slices.SortStableFunc(block.Line, less) + } +} + +// removeDups removes duplicate exclude, replace and tool directives. +// +// Earlier exclude and tool directives take priority. +// +// Later replace directives take priority. +// +// require directives are not de-duplicated. That's left up to higher-level +// logic (MVS). +// +// retract directives are not de-duplicated since comments are +// meaningful, and versions may be retracted multiple times. +func (f *File) removeDups() { + removeDups(f.Syntax, &f.Exclude, &f.Replace, &f.Tool, &f.Ignore) +} + +func removeDups(syntax *FileSyntax, exclude *[]*Exclude, replace *[]*Replace, tool *[]*Tool, ignore *[]*Ignore) { + kill := make(map[*Line]bool) + + // Remove duplicate excludes. + if exclude != nil { + haveExclude := make(map[module.Version]bool) + for _, x := range *exclude { + if haveExclude[x.Mod] { + kill[x.Syntax] = true + continue + } + haveExclude[x.Mod] = true + } + var excl []*Exclude + for _, x := range *exclude { + if !kill[x.Syntax] { + excl = append(excl, x) + } + } + *exclude = excl + } + + // Remove duplicate replacements. + // Later replacements take priority over earlier ones. + haveReplace := make(map[module.Version]bool) + for i := len(*replace) - 1; i >= 0; i-- { + x := (*replace)[i] + if haveReplace[x.Old] { + kill[x.Syntax] = true + continue + } + haveReplace[x.Old] = true + } + var repl []*Replace + for _, x := range *replace { + if !kill[x.Syntax] { + repl = append(repl, x) + } + } + *replace = repl + + if tool != nil { + haveTool := make(map[string]bool) + for _, t := range *tool { + if haveTool[t.Path] { + kill[t.Syntax] = true + continue + } + haveTool[t.Path] = true + } + var newTool []*Tool + for _, t := range *tool { + if !kill[t.Syntax] { + newTool = append(newTool, t) + } + } + *tool = newTool + } + + if ignore != nil { + haveIgnore := make(map[string]bool) + for _, i := range *ignore { + if haveIgnore[i.Path] { + kill[i.Syntax] = true + continue + } + haveIgnore[i.Path] = true + } + var newIgnore []*Ignore + for _, i := range *ignore { + if !kill[i.Syntax] { + newIgnore = append(newIgnore, i) + } + } + *ignore = newIgnore + } + + // Duplicate require and retract directives are not removed. + + // Drop killed statements from the syntax tree. + var stmts []Expr + for _, stmt := range syntax.Stmt { + switch stmt := stmt.(type) { + case *Line: + if kill[stmt] { + continue + } + case *LineBlock: + var lines []*Line + for _, line := range stmt.Line { + if !kill[line] { + lines = append(lines, line) + } + } + stmt.Line = lines + if len(lines) == 0 { + continue + } + } + stmts = append(stmts, stmt) + } + syntax.Stmt = stmts +} + +// compareLine compares li and lj. It sorts lexicographically without assigning +// any special meaning to tokens. +func compareLine(li, lj *Line) int { + for k := 0; k < len(li.Token) && k < len(lj.Token); k++ { + if li.Token[k] != lj.Token[k] { + return cmp.Compare(li.Token[k], lj.Token[k]) + } + } + return cmp.Compare(len(li.Token), len(lj.Token)) +} + +// compareLineExclude compares li and lj for lines in an "exclude" block. +func compareLineExclude(li, lj *Line) int { + if len(li.Token) != 2 || len(lj.Token) != 2 { + // Not a known exclude specification. + // Fall back to sorting lexicographically. + return compareLine(li, lj) + } + // An exclude specification has two tokens: ModulePath and Version. + // Compare module path by string order and version by semver rules. + if pi, pj := li.Token[0], lj.Token[0]; pi != pj { + return cmp.Compare(pi, pj) + } + return semver.Compare(li.Token[1], lj.Token[1]) +} + +// compareLineRetract compares li and lj for lines in a "retract" block. +// It treats each line as a version interval. Single versions are compared as +// if they were intervals with the same low and high version. +// Intervals are sorted in descending order, first by low version, then by +// high version, using [semver.Compare]. +func compareLineRetract(li, lj *Line) int { + interval := func(l *Line) VersionInterval { + if len(l.Token) == 1 { + return VersionInterval{Low: l.Token[0], High: l.Token[0]} + } else if len(l.Token) == 5 && l.Token[0] == "[" && l.Token[2] == "," && l.Token[4] == "]" { + return VersionInterval{Low: l.Token[1], High: l.Token[3]} + } else { + // Line in unknown format. Treat as an invalid version. + return VersionInterval{} + } + } + vii := interval(li) + vij := interval(lj) + if cmp := semver.Compare(vii.Low, vij.Low); cmp != 0 { + return -cmp + } + return -semver.Compare(vii.High, vij.High) +} + +// checkCanonicalVersion returns a non-nil error if vers is not a canonical +// version string or does not match the major version of path. +// +// If path is non-empty, the error text suggests a format with a major version +// corresponding to the path. +func checkCanonicalVersion(path, vers string) error { + _, pathMajor, pathMajorOk := module.SplitPathVersion(path) + + if vers == "" || vers != module.CanonicalVersion(vers) { + if pathMajor == "" { + return &module.InvalidVersionError{ + Version: vers, + Err: fmt.Errorf("must be of the form v1.2.3"), + } + } + return &module.InvalidVersionError{ + Version: vers, + Err: fmt.Errorf("must be of the form %s.2.3", module.PathMajorPrefix(pathMajor)), + } + } + + if pathMajorOk { + if err := module.CheckPathMajor(vers, pathMajor); err != nil { + if pathMajor == "" { + // In this context, the user probably wrote "v2.3.4" when they meant + // "v2.3.4+incompatible". Suggest that instead of "v0 or v1". + return &module.InvalidVersionError{ + Version: vers, + Err: fmt.Errorf("should be %s+incompatible (or module %s/%v)", vers, path, semver.Major(vers)), + } + } + return err + } + } + + return nil +} diff --git a/backend/vendor/golang.org/x/mod/modfile/work.go b/backend/vendor/golang.org/x/mod/modfile/work.go new file mode 100644 index 0000000..09df5ea --- /dev/null +++ b/backend/vendor/golang.org/x/mod/modfile/work.go @@ -0,0 +1,333 @@ +// Copyright 2021 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package modfile + +import ( + "fmt" + "slices" + "strings" +) + +// A WorkFile is the parsed, interpreted form of a go.work file. +type WorkFile struct { + Go *Go + Toolchain *Toolchain + Godebug []*Godebug + Use []*Use + Replace []*Replace + + Syntax *FileSyntax +} + +// A Use is a single directory statement. +type Use struct { + Path string // Use path of module. + ModulePath string // Module path in the comment. + Syntax *Line +} + +// ParseWork parses and returns a go.work file. +// +// file is the name of the file, used in positions and errors. +// +// data is the content of the file. +// +// fix is an optional function that canonicalizes module versions. +// If fix is nil, all module versions must be canonical ([module.CanonicalVersion] +// must return the same string). +func ParseWork(file string, data []byte, fix VersionFixer) (*WorkFile, error) { + fs, err := parse(file, data) + if err != nil { + return nil, err + } + f := &WorkFile{ + Syntax: fs, + } + var errs ErrorList + + for _, x := range fs.Stmt { + switch x := x.(type) { + case *Line: + f.add(&errs, x, x.Token[0], x.Token[1:], fix) + + case *LineBlock: + if len(x.Token) > 1 { + errs = append(errs, Error{ + Filename: file, + Pos: x.Start, + Err: fmt.Errorf("unknown block type: %s", strings.Join(x.Token, " ")), + }) + continue + } + switch x.Token[0] { + default: + errs = append(errs, Error{ + Filename: file, + Pos: x.Start, + Err: fmt.Errorf("unknown block type: %s", strings.Join(x.Token, " ")), + }) + continue + case "godebug", "use", "replace": + for _, l := range x.Line { + f.add(&errs, l, x.Token[0], l.Token, fix) + } + } + } + } + + if len(errs) > 0 { + return nil, errs + } + return f, nil +} + +// Cleanup cleans up the file f after any edit operations. +// To avoid quadratic behavior, modifications like [WorkFile.DropRequire] +// clear the entry but do not remove it from the slice. +// Cleanup cleans out all the cleared entries. +func (f *WorkFile) Cleanup() { + w := 0 + for _, r := range f.Use { + if r.Path != "" { + f.Use[w] = r + w++ + } + } + f.Use = f.Use[:w] + + w = 0 + for _, r := range f.Replace { + if r.Old.Path != "" { + f.Replace[w] = r + w++ + } + } + f.Replace = f.Replace[:w] + + f.Syntax.Cleanup() +} + +func (f *WorkFile) AddGoStmt(version string) error { + if !GoVersionRE.MatchString(version) { + return fmt.Errorf("invalid language version %q", version) + } + if f.Go == nil { + stmt := &Line{Token: []string{"go", version}} + f.Go = &Go{ + Version: version, + Syntax: stmt, + } + // Find the first non-comment-only block and add + // the go statement before it. That will keep file comments at the top. + i := 0 + for i = 0; i < len(f.Syntax.Stmt); i++ { + if _, ok := f.Syntax.Stmt[i].(*CommentBlock); !ok { + break + } + } + f.Syntax.Stmt = append(append(f.Syntax.Stmt[:i:i], stmt), f.Syntax.Stmt[i:]...) + } else { + f.Go.Version = version + f.Syntax.updateLine(f.Go.Syntax, "go", version) + } + return nil +} + +func (f *WorkFile) AddToolchainStmt(name string) error { + if !ToolchainRE.MatchString(name) { + return fmt.Errorf("invalid toolchain name %q", name) + } + if f.Toolchain == nil { + stmt := &Line{Token: []string{"toolchain", name}} + f.Toolchain = &Toolchain{ + Name: name, + Syntax: stmt, + } + // Find the go line and add the toolchain line after it. + // Or else find the first non-comment-only block and add + // the toolchain line before it. That will keep file comments at the top. + i := 0 + for i = 0; i < len(f.Syntax.Stmt); i++ { + if line, ok := f.Syntax.Stmt[i].(*Line); ok && len(line.Token) > 0 && line.Token[0] == "go" { + i++ + goto Found + } + } + for i = 0; i < len(f.Syntax.Stmt); i++ { + if _, ok := f.Syntax.Stmt[i].(*CommentBlock); !ok { + break + } + } + Found: + f.Syntax.Stmt = append(append(f.Syntax.Stmt[:i:i], stmt), f.Syntax.Stmt[i:]...) + } else { + f.Toolchain.Name = name + f.Syntax.updateLine(f.Toolchain.Syntax, "toolchain", name) + } + return nil +} + +// DropGoStmt deletes the go statement from the file. +func (f *WorkFile) DropGoStmt() { + if f.Go != nil { + f.Go.Syntax.markRemoved() + f.Go = nil + } +} + +// DropToolchainStmt deletes the toolchain statement from the file. +func (f *WorkFile) DropToolchainStmt() { + if f.Toolchain != nil { + f.Toolchain.Syntax.markRemoved() + f.Toolchain = nil + } +} + +// AddGodebug sets the first godebug line for key to value, +// preserving any existing comments for that line and removing all +// other godebug lines for key. +// +// If no line currently exists for key, AddGodebug adds a new line +// at the end of the last godebug block. +func (f *WorkFile) AddGodebug(key, value string) error { + need := true + for _, g := range f.Godebug { + if g.Key == key { + if need { + g.Value = value + f.Syntax.updateLine(g.Syntax, "godebug", key+"="+value) + need = false + } else { + g.Syntax.markRemoved() + *g = Godebug{} + } + } + } + + if need { + f.addNewGodebug(key, value) + } + return nil +} + +// addNewGodebug adds a new godebug key=value line at the end +// of the last godebug block, regardless of any existing godebug lines for key. +func (f *WorkFile) addNewGodebug(key, value string) { + line := f.Syntax.addLine(nil, "godebug", key+"="+value) + g := &Godebug{ + Key: key, + Value: value, + Syntax: line, + } + f.Godebug = append(f.Godebug, g) +} + +func (f *WorkFile) DropGodebug(key string) error { + for _, g := range f.Godebug { + if g.Key == key { + g.Syntax.markRemoved() + *g = Godebug{} + } + } + return nil +} + +func (f *WorkFile) AddUse(diskPath, modulePath string) error { + need := true + for _, d := range f.Use { + if d.Path == diskPath { + if need { + d.ModulePath = modulePath + f.Syntax.updateLine(d.Syntax, "use", AutoQuote(diskPath)) + need = false + } else { + d.Syntax.markRemoved() + *d = Use{} + } + } + } + + if need { + f.AddNewUse(diskPath, modulePath) + } + return nil +} + +func (f *WorkFile) AddNewUse(diskPath, modulePath string) { + line := f.Syntax.addLine(nil, "use", AutoQuote(diskPath)) + f.Use = append(f.Use, &Use{Path: diskPath, ModulePath: modulePath, Syntax: line}) +} + +func (f *WorkFile) SetUse(dirs []*Use) { + need := make(map[string]string) + for _, d := range dirs { + need[d.Path] = d.ModulePath + } + + for _, d := range f.Use { + if modulePath, ok := need[d.Path]; ok { + d.ModulePath = modulePath + } else { + d.Syntax.markRemoved() + *d = Use{} + } + } + + // TODO(#45713): Add module path to comment. + + for diskPath, modulePath := range need { + f.AddNewUse(diskPath, modulePath) + } + f.SortBlocks() +} + +func (f *WorkFile) DropUse(path string) error { + for _, d := range f.Use { + if d.Path == path { + d.Syntax.markRemoved() + *d = Use{} + } + } + return nil +} + +func (f *WorkFile) AddReplace(oldPath, oldVers, newPath, newVers string) error { + return addReplace(f.Syntax, &f.Replace, oldPath, oldVers, newPath, newVers) +} + +func (f *WorkFile) DropReplace(oldPath, oldVers string) error { + for _, r := range f.Replace { + if r.Old.Path == oldPath && r.Old.Version == oldVers { + r.Syntax.markRemoved() + *r = Replace{} + } + } + return nil +} + +func (f *WorkFile) SortBlocks() { + f.removeDups() // otherwise sorting is unsafe + + for _, stmt := range f.Syntax.Stmt { + block, ok := stmt.(*LineBlock) + if !ok { + continue + } + slices.SortStableFunc(block.Line, compareLine) + } +} + +// removeDups removes duplicate replace directives. +// +// Later replace directives take priority. +// +// require directives are not de-duplicated. That's left up to higher-level +// logic (MVS). +// +// retract directives are not de-duplicated since comments are +// meaningful, and versions may be retracted multiple times. +func (f *WorkFile) removeDups() { + removeDups(f.Syntax, nil, &f.Replace, nil, nil) +} diff --git a/backend/vendor/golang.org/x/mod/module/module.go b/backend/vendor/golang.org/x/mod/module/module.go new file mode 100644 index 0000000..16e1aa7 --- /dev/null +++ b/backend/vendor/golang.org/x/mod/module/module.go @@ -0,0 +1,840 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package module defines the module.Version type along with support code. +// +// The [module.Version] type is a simple Path, Version pair: +// +// type Version struct { +// Path string +// Version string +// } +// +// There are no restrictions imposed directly by use of this structure, +// but additional checking functions, most notably [Check], verify that +// a particular path, version pair is valid. +// +// # Escaped Paths +// +// Module paths appear as substrings of file system paths +// (in the download cache) and of web server URLs in the proxy protocol. +// In general we cannot rely on file systems to be case-sensitive, +// nor can we rely on web servers, since they read from file systems. +// That is, we cannot rely on the file system to keep rsc.io/QUOTE +// and rsc.io/quote separate. Windows and macOS don't. +// Instead, we must never require two different casings of a file path. +// Because we want the download cache to match the proxy protocol, +// and because we want the proxy protocol to be possible to serve +// from a tree of static files (which might be stored on a case-insensitive +// file system), the proxy protocol must never require two different casings +// of a URL path either. +// +// One possibility would be to make the escaped form be the lowercase +// hexadecimal encoding of the actual path bytes. This would avoid ever +// needing different casings of a file path, but it would be fairly illegible +// to most programmers when those paths appeared in the file system +// (including in file paths in compiler errors and stack traces) +// in web server logs, and so on. Instead, we want a safe escaped form that +// leaves most paths unaltered. +// +// The safe escaped form is to replace every uppercase letter +// with an exclamation mark followed by the letter's lowercase equivalent. +// +// For example, +// +// github.com/Azure/azure-sdk-for-go -> github.com/!azure/azure-sdk-for-go. +// github.com/GoogleCloudPlatform/cloudsql-proxy -> github.com/!google!cloud!platform/cloudsql-proxy +// github.com/Sirupsen/logrus -> github.com/!sirupsen/logrus. +// +// Import paths that avoid upper-case letters are left unchanged. +// Note that because import paths are ASCII-only and avoid various +// problematic punctuation (like : < and >), the escaped form is also ASCII-only +// and avoids the same problematic punctuation. +// +// Import paths have never allowed exclamation marks, so there is no +// need to define how to escape a literal !. +// +// # Unicode Restrictions +// +// Today, paths are disallowed from using Unicode. +// +// Although paths are currently disallowed from using Unicode, +// we would like at some point to allow Unicode letters as well, to assume that +// file systems and URLs are Unicode-safe (storing UTF-8), and apply +// the !-for-uppercase convention for escaping them in the file system. +// But there are at least two subtle considerations. +// +// First, note that not all case-fold equivalent distinct runes +// form an upper/lower pair. +// For example, U+004B ('K'), U+006B ('k'), and U+212A ('K' for Kelvin) +// are three distinct runes that case-fold to each other. +// When we do add Unicode letters, we must not assume that upper/lower +// are the only case-equivalent pairs. +// Perhaps the Kelvin symbol would be disallowed entirely, for example. +// Or perhaps it would escape as "!!k", or perhaps as "(212A)". +// +// Second, it would be nice to allow Unicode marks as well as letters, +// but marks include combining marks, and then we must deal not +// only with case folding but also normalization: both U+00E9 ('é') +// and U+0065 U+0301 ('e' followed by combining acute accent) +// look the same on the page and are treated by some file systems +// as the same path. If we do allow Unicode marks in paths, there +// must be some kind of normalization to allow only one canonical +// encoding of any character used in an import path. +package module + +// IMPORTANT NOTE +// +// This file essentially defines the set of valid import paths for the go command. +// There are many subtle considerations, including Unicode ambiguity, +// security, network, and file system representations. +// +// This file also defines the set of valid module path and version combinations, +// another topic with many subtle considerations. +// +// Changes to the semantics in this file require approval from rsc. + +import ( + "cmp" + "errors" + "fmt" + "path" + "slices" + "strings" + "unicode" + "unicode/utf8" + + "golang.org/x/mod/semver" +) + +// A Version (for clients, a module.Version) is defined by a module path and version pair. +// These are stored in their plain (unescaped) form. +type Version struct { + // Path is a module path, like "golang.org/x/text" or "rsc.io/quote/v2". + Path string + + // Version is usually a semantic version in canonical form. + // There are three exceptions to this general rule. + // First, the top-level target of a build has no specific version + // and uses Version = "". + // Second, during MVS calculations the version "none" is used + // to represent the decision to take no version of a given module. + // Third, filesystem paths found in "replace" directives are + // represented by a path with an empty version. + Version string `json:",omitempty"` +} + +// String returns a representation of the Version suitable for logging +// (Path@Version, or just Path if Version is empty). +func (m Version) String() string { + if m.Version == "" { + return m.Path + } + return m.Path + "@" + m.Version +} + +// A ModuleError indicates an error specific to a module. +type ModuleError struct { + Path string + Version string + Err error +} + +// VersionError returns a [ModuleError] derived from a [Version] and error, +// or err itself if it is already such an error. +func VersionError(v Version, err error) error { + var mErr *ModuleError + if errors.As(err, &mErr) && mErr.Path == v.Path && mErr.Version == v.Version { + return err + } + return &ModuleError{ + Path: v.Path, + Version: v.Version, + Err: err, + } +} + +func (e *ModuleError) Error() string { + if v, ok := e.Err.(*InvalidVersionError); ok { + return fmt.Sprintf("%s@%s: invalid %s: %v", e.Path, v.Version, v.noun(), v.Err) + } + if e.Version != "" { + return fmt.Sprintf("%s@%s: %v", e.Path, e.Version, e.Err) + } + return fmt.Sprintf("module %s: %v", e.Path, e.Err) +} + +func (e *ModuleError) Unwrap() error { return e.Err } + +// An InvalidVersionError indicates an error specific to a version, with the +// module path unknown or specified externally. +// +// A [ModuleError] may wrap an InvalidVersionError, but an InvalidVersionError +// must not wrap a ModuleError. +type InvalidVersionError struct { + Version string + Pseudo bool + Err error +} + +// noun returns either "version" or "pseudo-version", depending on whether +// e.Version is a pseudo-version. +func (e *InvalidVersionError) noun() string { + if e.Pseudo { + return "pseudo-version" + } + return "version" +} + +func (e *InvalidVersionError) Error() string { + return fmt.Sprintf("%s %q invalid: %s", e.noun(), e.Version, e.Err) +} + +func (e *InvalidVersionError) Unwrap() error { return e.Err } + +// An InvalidPathError indicates a module, import, or file path doesn't +// satisfy all naming constraints. See [CheckPath], [CheckImportPath], +// and [CheckFilePath] for specific restrictions. +type InvalidPathError struct { + Kind string // "module", "import", or "file" + Path string + Err error +} + +func (e *InvalidPathError) Error() string { + return fmt.Sprintf("malformed %s path %q: %v", e.Kind, e.Path, e.Err) +} + +func (e *InvalidPathError) Unwrap() error { return e.Err } + +// Check checks that a given module path, version pair is valid. +// In addition to the path being a valid module path +// and the version being a valid semantic version, +// the two must correspond. +// For example, the path "yaml/v2" only corresponds to +// semantic versions beginning with "v2.". +func Check(path, version string) error { + if err := CheckPath(path); err != nil { + return err + } + if !semver.IsValid(version) { + return &ModuleError{ + Path: path, + Err: &InvalidVersionError{Version: version, Err: errors.New("not a semantic version")}, + } + } + _, pathMajor, _ := SplitPathVersion(path) + if err := CheckPathMajor(version, pathMajor); err != nil { + return &ModuleError{Path: path, Err: err} + } + return nil +} + +// firstPathOK reports whether r can appear in the first element of a module path. +// The first element of the path must be an LDH domain name, at least for now. +// To avoid case ambiguity, the domain name must be entirely lower case. +func firstPathOK(r rune) bool { + return r == '-' || r == '.' || + '0' <= r && r <= '9' || + 'a' <= r && r <= 'z' +} + +// modPathOK reports whether r can appear in a module path element. +// Paths can be ASCII letters, ASCII digits, and limited ASCII punctuation: - . _ and ~. +// +// This matches what "go get" has historically recognized in import paths, +// and avoids confusing sequences like '%20' or '+' that would change meaning +// if used in a URL. +// +// TODO(rsc): We would like to allow Unicode letters, but that requires additional +// care in the safe encoding (see "escaped paths" above). +func modPathOK(r rune) bool { + if r < utf8.RuneSelf { + return r == '-' || r == '.' || r == '_' || r == '~' || + '0' <= r && r <= '9' || + 'A' <= r && r <= 'Z' || + 'a' <= r && r <= 'z' + } + return false +} + +// importPathOK reports whether r can appear in a package import path element. +// +// Import paths are intermediate between module paths and file paths: we allow +// disallow characters that would be confusing or ambiguous as arguments to +// 'go get' (such as '@' and ' ' ), but allow certain characters that are +// otherwise-unambiguous on the command line and historically used for some +// binary names (such as '++' as a suffix for compiler binaries and wrappers). +func importPathOK(r rune) bool { + return modPathOK(r) || r == '+' +} + +// fileNameOK reports whether r can appear in a file name. +// For now we allow all Unicode letters but otherwise limit to pathOK plus a few more punctuation characters. +// If we expand the set of allowed characters here, we have to +// work harder at detecting potential case-folding and normalization collisions. +// See note about "escaped paths" above. +func fileNameOK(r rune) bool { + if r < utf8.RuneSelf { + // Entire set of ASCII punctuation, from which we remove characters: + // ! " # $ % & ' ( ) * + , - . / : ; < = > ? @ [ \ ] ^ _ ` { | } ~ + // We disallow some shell special characters: " ' * < > ? ` | + // (Note that some of those are disallowed by the Windows file system as well.) + // We also disallow path separators / : and \ (fileNameOK is only called on path element characters). + // We allow spaces (U+0020) in file names. + const allowed = "!#$%&()+,-.=@[]^_{}~ " + if '0' <= r && r <= '9' || 'A' <= r && r <= 'Z' || 'a' <= r && r <= 'z' { + return true + } + return strings.ContainsRune(allowed, r) + } + // It may be OK to add more ASCII punctuation here, but only carefully. + // For example Windows disallows < > \, and macOS disallows :, so we must not allow those. + return unicode.IsLetter(r) +} + +// CheckPath checks that a module path is valid. +// A valid module path is a valid import path, as checked by [CheckImportPath], +// with three additional constraints. +// First, the leading path element (up to the first slash, if any), +// by convention a domain name, must contain only lower-case ASCII letters, +// ASCII digits, dots (U+002E), and dashes (U+002D); +// it must contain at least one dot and cannot start with a dash. +// Second, for a final path element of the form /vN, where N looks numeric +// (ASCII digits and dots) must not begin with a leading zero, must not be /v1, +// and must not contain any dots. For paths beginning with "gopkg.in/", +// this second requirement is replaced by a requirement that the path +// follow the gopkg.in server's conventions. +// Third, no path element may begin with a dot. +func CheckPath(path string) (err error) { + defer func() { + if err != nil { + err = &InvalidPathError{Kind: "module", Path: path, Err: err} + } + }() + + if err := checkPath(path, modulePath); err != nil { + return err + } + i := strings.Index(path, "/") + if i < 0 { + i = len(path) + } + if i == 0 { + return fmt.Errorf("leading slash") + } + if !strings.Contains(path[:i], ".") { + return fmt.Errorf("missing dot in first path element") + } + if path[0] == '-' { + return fmt.Errorf("leading dash in first path element") + } + for _, r := range path[:i] { + if !firstPathOK(r) { + return fmt.Errorf("invalid char %q in first path element", r) + } + } + if _, _, ok := SplitPathVersion(path); !ok { + return fmt.Errorf("invalid version") + } + return nil +} + +// CheckImportPath checks that an import path is valid. +// +// A valid import path consists of one or more valid path elements +// separated by slashes (U+002F). (It must not begin with nor end in a slash.) +// +// A valid path element is a non-empty string made up of +// ASCII letters, ASCII digits, and limited ASCII punctuation: - . _ and ~. +// It must not end with a dot (U+002E), nor contain two dots in a row. +// +// The element prefix up to the first dot must not be a reserved file name +// on Windows, regardless of case (CON, com1, NuL, and so on). The element +// must not have a suffix of a tilde followed by one or more ASCII digits +// (to exclude paths elements that look like Windows short-names). +// +// CheckImportPath may be less restrictive in the future, but see the +// top-level package documentation for additional information about +// subtleties of Unicode. +func CheckImportPath(path string) error { + if err := checkPath(path, importPath); err != nil { + return &InvalidPathError{Kind: "import", Path: path, Err: err} + } + return nil +} + +// pathKind indicates what kind of path we're checking. Module paths, +// import paths, and file paths have different restrictions. +type pathKind int + +const ( + modulePath pathKind = iota + importPath + filePath +) + +// checkPath checks that a general path is valid. kind indicates what +// specific constraints should be applied. +// +// checkPath returns an error describing why the path is not valid. +// Because these checks apply to module, import, and file paths, +// and because other checks may be applied, the caller is expected to wrap +// this error with [InvalidPathError]. +func checkPath(path string, kind pathKind) error { + if !utf8.ValidString(path) { + return fmt.Errorf("invalid UTF-8") + } + if path == "" { + return fmt.Errorf("empty string") + } + if path[0] == '-' && kind != filePath { + return fmt.Errorf("leading dash") + } + if strings.Contains(path, "//") { + return fmt.Errorf("double slash") + } + if path[len(path)-1] == '/' { + return fmt.Errorf("trailing slash") + } + elemStart := 0 + for i, r := range path { + if r == '/' { + if err := checkElem(path[elemStart:i], kind); err != nil { + return err + } + elemStart = i + 1 + } + } + if err := checkElem(path[elemStart:], kind); err != nil { + return err + } + return nil +} + +// checkElem checks whether an individual path element is valid. +func checkElem(elem string, kind pathKind) error { + if elem == "" { + return fmt.Errorf("empty path element") + } + if strings.Count(elem, ".") == len(elem) { + return fmt.Errorf("invalid path element %q", elem) + } + if elem[0] == '.' && kind == modulePath { + return fmt.Errorf("leading dot in path element") + } + if elem[len(elem)-1] == '.' { + return fmt.Errorf("trailing dot in path element") + } + for _, r := range elem { + ok := false + switch kind { + case modulePath: + ok = modPathOK(r) + case importPath: + ok = importPathOK(r) + case filePath: + ok = fileNameOK(r) + default: + panic(fmt.Sprintf("internal error: invalid kind %v", kind)) + } + if !ok { + return fmt.Errorf("invalid char %q", r) + } + } + + // Windows disallows a bunch of path elements, sadly. + // See https://docs.microsoft.com/en-us/windows/desktop/fileio/naming-a-file + short := elem + if i := strings.Index(short, "."); i >= 0 { + short = short[:i] + } + for _, bad := range badWindowsNames { + if strings.EqualFold(bad, short) { + return fmt.Errorf("%q disallowed as path element component on Windows", short) + } + } + + if kind == filePath { + // don't check for Windows short-names in file names. They're + // only an issue for import paths. + return nil + } + + // Reject path components that look like Windows short-names. + // Those usually end in a tilde followed by one or more ASCII digits. + if tilde := strings.LastIndexByte(short, '~'); tilde >= 0 && tilde < len(short)-1 { + suffix := short[tilde+1:] + suffixIsDigits := true + for _, r := range suffix { + if r < '0' || r > '9' { + suffixIsDigits = false + break + } + } + if suffixIsDigits { + return fmt.Errorf("trailing tilde and digits in path element") + } + } + + return nil +} + +// CheckFilePath checks that a slash-separated file path is valid. +// The definition of a valid file path is the same as the definition +// of a valid import path except that the set of allowed characters is larger: +// all Unicode letters, ASCII digits, the ASCII space character (U+0020), +// and the ASCII punctuation characters +// “!#$%&()+,-.=@[]^_{}~”. +// (The excluded punctuation characters, " * < > ? ` ' | / \ and :, +// have special meanings in certain shells or operating systems.) +// +// CheckFilePath may be less restrictive in the future, but see the +// top-level package documentation for additional information about +// subtleties of Unicode. +func CheckFilePath(path string) error { + if err := checkPath(path, filePath); err != nil { + return &InvalidPathError{Kind: "file", Path: path, Err: err} + } + return nil +} + +// badWindowsNames are the reserved file path elements on Windows. +// See https://docs.microsoft.com/en-us/windows/desktop/fileio/naming-a-file +var badWindowsNames = []string{ + "CON", + "PRN", + "AUX", + "NUL", + "COM1", + "COM2", + "COM3", + "COM4", + "COM5", + "COM6", + "COM7", + "COM8", + "COM9", + "LPT1", + "LPT2", + "LPT3", + "LPT4", + "LPT5", + "LPT6", + "LPT7", + "LPT8", + "LPT9", +} + +// SplitPathVersion returns prefix and major version such that prefix+pathMajor == path +// and version is either empty or "/vN" for N >= 2. +// As a special case, gopkg.in paths are recognized directly; +// they require ".vN" instead of "/vN", and for all N, not just N >= 2. +// SplitPathVersion returns with ok = false when presented with +// a path whose last path element does not satisfy the constraints +// applied by [CheckPath], such as "example.com/pkg/v1" or "example.com/pkg/v1.2". +func SplitPathVersion(path string) (prefix, pathMajor string, ok bool) { + if strings.HasPrefix(path, "gopkg.in/") { + return splitGopkgIn(path) + } + + i := len(path) + dot := false + for i > 0 && ('0' <= path[i-1] && path[i-1] <= '9' || path[i-1] == '.') { + if path[i-1] == '.' { + dot = true + } + i-- + } + if i <= 1 || i == len(path) || path[i-1] != 'v' || path[i-2] != '/' { + return path, "", true + } + prefix, pathMajor = path[:i-2], path[i-2:] + if dot || len(pathMajor) <= 2 || pathMajor[2] == '0' || pathMajor == "/v1" { + return path, "", false + } + return prefix, pathMajor, true +} + +// splitGopkgIn is like SplitPathVersion but only for gopkg.in paths. +func splitGopkgIn(path string) (prefix, pathMajor string, ok bool) { + if !strings.HasPrefix(path, "gopkg.in/") { + return path, "", false + } + i := len(path) + if strings.HasSuffix(path, "-unstable") { + i -= len("-unstable") + } + for i > 0 && ('0' <= path[i-1] && path[i-1] <= '9') { + i-- + } + if i <= 1 || path[i-1] != 'v' || path[i-2] != '.' { + // All gopkg.in paths must end in vN for some N. + return path, "", false + } + prefix, pathMajor = path[:i-2], path[i-2:] + if len(pathMajor) <= 2 || pathMajor[2] == '0' && pathMajor != ".v0" { + return path, "", false + } + return prefix, pathMajor, true +} + +// MatchPathMajor reports whether the semantic version v +// matches the path major version pathMajor. +// +// MatchPathMajor returns true if and only if [CheckPathMajor] returns nil. +func MatchPathMajor(v, pathMajor string) bool { + return CheckPathMajor(v, pathMajor) == nil +} + +// CheckPathMajor returns a non-nil error if the semantic version v +// does not match the path major version pathMajor. +func CheckPathMajor(v, pathMajor string) error { + // TODO(jayconrod): return errors or panic for invalid inputs. This function + // (and others) was covered by integration tests for cmd/go, and surrounding + // code protected against invalid inputs like non-canonical versions. + if strings.HasPrefix(pathMajor, ".v") && strings.HasSuffix(pathMajor, "-unstable") { + pathMajor = strings.TrimSuffix(pathMajor, "-unstable") + } + if strings.HasPrefix(v, "v0.0.0-") && pathMajor == ".v1" { + // Allow old bug in pseudo-versions that generated v0.0.0- pseudoversion for gopkg .v1. + // For example, gopkg.in/yaml.v2@v2.2.1's go.mod requires gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405. + return nil + } + m := semver.Major(v) + if pathMajor == "" { + if m == "v0" || m == "v1" || semver.Build(v) == "+incompatible" { + return nil + } + pathMajor = "v0 or v1" + } else if pathMajor[0] == '/' || pathMajor[0] == '.' { + if m == pathMajor[1:] { + return nil + } + pathMajor = pathMajor[1:] + } + return &InvalidVersionError{ + Version: v, + Err: fmt.Errorf("should be %s, not %s", pathMajor, semver.Major(v)), + } +} + +// PathMajorPrefix returns the major-version tag prefix implied by pathMajor. +// An empty PathMajorPrefix allows either v0 or v1. +// +// Note that [MatchPathMajor] may accept some versions that do not actually begin +// with this prefix: namely, it accepts a 'v0.0.0-' prefix for a '.v1' +// pathMajor, even though that pathMajor implies 'v1' tagging. +func PathMajorPrefix(pathMajor string) string { + if pathMajor == "" { + return "" + } + if pathMajor[0] != '/' && pathMajor[0] != '.' { + panic("pathMajor suffix " + pathMajor + " passed to PathMajorPrefix lacks separator") + } + if strings.HasPrefix(pathMajor, ".v") && strings.HasSuffix(pathMajor, "-unstable") { + pathMajor = strings.TrimSuffix(pathMajor, "-unstable") + } + m := pathMajor[1:] + if m != semver.Major(m) { + panic("pathMajor suffix " + pathMajor + "passed to PathMajorPrefix is not a valid major version") + } + return m +} + +// CanonicalVersion returns the canonical form of the version string v. +// It is the same as [semver.Canonical] except that it preserves the special build suffix "+incompatible". +func CanonicalVersion(v string) string { + cv := semver.Canonical(v) + if semver.Build(v) == "+incompatible" { + cv += "+incompatible" + } + return cv +} + +// Sort sorts the list by Path, breaking ties by comparing [Version] fields. +// The Version fields are interpreted as semantic versions (using [semver.Compare]) +// optionally followed by a tie-breaking suffix introduced by a slash character, +// like in "v0.0.1/go.mod". +func Sort(list []Version) { + slices.SortFunc(list, func(i, j Version) int { + if i.Path != j.Path { + return strings.Compare(i.Path, j.Path) + } + // To help go.sum formatting, allow version/file. + // Compare semver prefix by semver rules, + // file by string order. + vi := i.Version + vj := j.Version + var fi, fj string + if k := strings.Index(vi, "/"); k >= 0 { + vi, fi = vi[:k], vi[k:] + } + if k := strings.Index(vj, "/"); k >= 0 { + vj, fj = vj[:k], vj[k:] + } + if vi != vj { + return semver.Compare(vi, vj) + } + return cmp.Compare(fi, fj) + }) +} + +// EscapePath returns the escaped form of the given module path. +// It fails if the module path is invalid. +func EscapePath(path string) (escaped string, err error) { + if err := CheckPath(path); err != nil { + return "", err + } + + return escapeString(path) +} + +// EscapeVersion returns the escaped form of the given module version. +// Versions are allowed to be in non-semver form but must be valid file names +// and not contain exclamation marks. +func EscapeVersion(v string) (escaped string, err error) { + if err := checkElem(v, filePath); err != nil || strings.Contains(v, "!") { + return "", &InvalidVersionError{ + Version: v, + Err: fmt.Errorf("disallowed version string"), + } + } + return escapeString(v) +} + +func escapeString(s string) (escaped string, err error) { + haveUpper := false + for _, r := range s { + if r == '!' || r >= utf8.RuneSelf { + // This should be disallowed by CheckPath, but diagnose anyway. + // The correctness of the escaping loop below depends on it. + return "", fmt.Errorf("internal error: inconsistency in EscapePath") + } + if 'A' <= r && r <= 'Z' { + haveUpper = true + } + } + + if !haveUpper { + return s, nil + } + + var buf []byte + for _, r := range s { + if 'A' <= r && r <= 'Z' { + buf = append(buf, '!', byte(r+'a'-'A')) + } else { + buf = append(buf, byte(r)) + } + } + return string(buf), nil +} + +// UnescapePath returns the module path for the given escaped path. +// It fails if the escaped path is invalid or describes an invalid path. +func UnescapePath(escaped string) (path string, err error) { + path, ok := unescapeString(escaped) + if !ok { + return "", fmt.Errorf("invalid escaped module path %q", escaped) + } + if err := CheckPath(path); err != nil { + return "", fmt.Errorf("invalid escaped module path %q: %v", escaped, err) + } + return path, nil +} + +// UnescapeVersion returns the version string for the given escaped version. +// It fails if the escaped form is invalid or describes an invalid version. +// Versions are allowed to be in non-semver form but must be valid file names +// and not contain exclamation marks. +func UnescapeVersion(escaped string) (v string, err error) { + v, ok := unescapeString(escaped) + if !ok { + return "", fmt.Errorf("invalid escaped version %q", escaped) + } + if err := checkElem(v, filePath); err != nil { + return "", fmt.Errorf("invalid escaped version %q: %v", v, err) + } + return v, nil +} + +func unescapeString(escaped string) (string, bool) { + var buf []byte + + bang := false + for _, r := range escaped { + if r >= utf8.RuneSelf { + return "", false + } + if bang { + bang = false + if r < 'a' || 'z' < r { + return "", false + } + buf = append(buf, byte(r+'A'-'a')) + continue + } + if r == '!' { + bang = true + continue + } + if 'A' <= r && r <= 'Z' { + return "", false + } + buf = append(buf, byte(r)) + } + if bang { + return "", false + } + return string(buf), true +} + +// MatchPrefixPatterns reports whether any path prefix of target matches one of +// the glob patterns (as defined by [path.Match]) in the comma-separated globs +// list. This implements the algorithm used when matching a module path to the +// GOPRIVATE environment variable, as described by 'go help module-private'. +// +// It ignores any empty or malformed patterns in the list. +// Trailing slashes on patterns are ignored. +func MatchPrefixPatterns(globs, target string) bool { + for globs != "" { + // Extract next non-empty glob in comma-separated list. + var glob string + if i := strings.Index(globs, ","); i >= 0 { + glob, globs = globs[:i], globs[i+1:] + } else { + glob, globs = globs, "" + } + glob = strings.TrimSuffix(glob, "/") + if glob == "" { + continue + } + + // A glob with N+1 path elements (N slashes) needs to be matched + // against the first N+1 path elements of target, + // which end just before the N+1'th slash. + n := strings.Count(glob, "/") + prefix := target + // Walk target, counting slashes, truncating at the N+1'th slash. + for i := 0; i < len(target); i++ { + if target[i] == '/' { + if n == 0 { + prefix = target[:i] + break + } + n-- + } + } + if n > 0 { + // Not enough prefix elements. + continue + } + matched, _ := path.Match(glob, prefix) + if matched { + return true + } + } + return false +} diff --git a/backend/vendor/golang.org/x/mod/module/pseudo.go b/backend/vendor/golang.org/x/mod/module/pseudo.go new file mode 100644 index 0000000..9cf19d3 --- /dev/null +++ b/backend/vendor/golang.org/x/mod/module/pseudo.go @@ -0,0 +1,250 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Pseudo-versions +// +// Code authors are expected to tag the revisions they want users to use, +// including prereleases. However, not all authors tag versions at all, +// and not all commits a user might want to try will have tags. +// A pseudo-version is a version with a special form that allows us to +// address an untagged commit and order that version with respect to +// other versions we might encounter. +// +// A pseudo-version takes one of the general forms: +// +// (1) vX.0.0-yyyymmddhhmmss-abcdef123456 +// (2) vX.Y.(Z+1)-0.yyyymmddhhmmss-abcdef123456 +// (3) vX.Y.(Z+1)-0.yyyymmddhhmmss-abcdef123456+incompatible +// (4) vX.Y.Z-pre.0.yyyymmddhhmmss-abcdef123456 +// (5) vX.Y.Z-pre.0.yyyymmddhhmmss-abcdef123456+incompatible +// +// If there is no recently tagged version with the right major version vX, +// then form (1) is used, creating a space of pseudo-versions at the bottom +// of the vX version range, less than any tagged version, including the unlikely v0.0.0. +// +// If the most recent tagged version before the target commit is vX.Y.Z or vX.Y.Z+incompatible, +// then the pseudo-version uses form (2) or (3), making it a prerelease for the next +// possible semantic version after vX.Y.Z. The leading 0 segment in the prerelease string +// ensures that the pseudo-version compares less than possible future explicit prereleases +// like vX.Y.(Z+1)-rc1 or vX.Y.(Z+1)-1. +// +// If the most recent tagged version before the target commit is vX.Y.Z-pre or vX.Y.Z-pre+incompatible, +// then the pseudo-version uses form (4) or (5), making it a slightly later prerelease. + +package module + +import ( + "errors" + "fmt" + "strings" + "time" + + "golang.org/x/mod/internal/lazyregexp" + "golang.org/x/mod/semver" +) + +var pseudoVersionRE = lazyregexp.New(`^v[0-9]+\.(0\.0-|\d+\.\d+-([^+]*\.)?0\.)\d{14}-[A-Za-z0-9]+(\+[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?$`) + +const PseudoVersionTimestampFormat = "20060102150405" + +// PseudoVersion returns a pseudo-version for the given major version ("v1") +// preexisting older tagged version ("" or "v1.2.3" or "v1.2.3-pre"), revision time, +// and revision identifier (usually a 12-byte commit hash prefix). +func PseudoVersion(major, older string, t time.Time, rev string) string { + if major == "" { + major = "v0" + } + segment := fmt.Sprintf("%s-%s", t.UTC().Format(PseudoVersionTimestampFormat), rev) + build := semver.Build(older) + older = semver.Canonical(older) + if older == "" { + return major + ".0.0-" + segment // form (1) + } + if semver.Prerelease(older) != "" { + return older + ".0." + segment + build // form (4), (5) + } + + // Form (2), (3). + // Extract patch from vMAJOR.MINOR.PATCH + i := strings.LastIndex(older, ".") + 1 + v, patch := older[:i], older[i:] + + // Reassemble. + return v + incDecimal(patch) + "-0." + segment + build +} + +// ZeroPseudoVersion returns a pseudo-version with a zero timestamp and +// revision, which may be used as a placeholder. +func ZeroPseudoVersion(major string) string { + return PseudoVersion(major, "", time.Time{}, "000000000000") +} + +// incDecimal returns the decimal string incremented by 1. +func incDecimal(decimal string) string { + // Scan right to left turning 9s to 0s until you find a digit to increment. + digits := []byte(decimal) + i := len(digits) - 1 + for ; i >= 0 && digits[i] == '9'; i-- { + digits[i] = '0' + } + if i >= 0 { + digits[i]++ + } else { + // digits is all zeros + digits[0] = '1' + digits = append(digits, '0') + } + return string(digits) +} + +// decDecimal returns the decimal string decremented by 1, or the empty string +// if the decimal is all zeroes. +func decDecimal(decimal string) string { + // Scan right to left turning 0s to 9s until you find a digit to decrement. + digits := []byte(decimal) + i := len(digits) - 1 + for ; i >= 0 && digits[i] == '0'; i-- { + digits[i] = '9' + } + if i < 0 { + // decimal is all zeros + return "" + } + if i == 0 && digits[i] == '1' && len(digits) > 1 { + digits = digits[1:] + } else { + digits[i]-- + } + return string(digits) +} + +// IsPseudoVersion reports whether v is a pseudo-version. +func IsPseudoVersion(v string) bool { + return strings.Count(v, "-") >= 2 && semver.IsValid(v) && pseudoVersionRE.MatchString(v) +} + +// IsZeroPseudoVersion returns whether v is a pseudo-version with a zero base, +// timestamp, and revision, as returned by [ZeroPseudoVersion]. +func IsZeroPseudoVersion(v string) bool { + return v == ZeroPseudoVersion(semver.Major(v)) +} + +// PseudoVersionTime returns the time stamp of the pseudo-version v. +// It returns an error if v is not a pseudo-version or if the time stamp +// embedded in the pseudo-version is not a valid time. +func PseudoVersionTime(v string) (time.Time, error) { + _, timestamp, _, _, err := parsePseudoVersion(v) + if err != nil { + return time.Time{}, err + } + t, err := time.Parse("20060102150405", timestamp) + if err != nil { + return time.Time{}, &InvalidVersionError{ + Version: v, + Pseudo: true, + Err: fmt.Errorf("malformed time %q", timestamp), + } + } + return t, nil +} + +// PseudoVersionRev returns the revision identifier of the pseudo-version v. +// It returns an error if v is not a pseudo-version. +func PseudoVersionRev(v string) (rev string, err error) { + _, _, rev, _, err = parsePseudoVersion(v) + return +} + +// PseudoVersionBase returns the canonical parent version, if any, upon which +// the pseudo-version v is based. +// +// If v has no parent version (that is, if it is "vX.0.0-[…]"), +// PseudoVersionBase returns the empty string and a nil error. +func PseudoVersionBase(v string) (string, error) { + base, _, _, build, err := parsePseudoVersion(v) + if err != nil { + return "", err + } + + switch pre := semver.Prerelease(base); pre { + case "": + // vX.0.0-yyyymmddhhmmss-abcdef123456 → "" + if build != "" { + // Pseudo-versions of the form vX.0.0-yyyymmddhhmmss-abcdef123456+incompatible + // are nonsensical: the "vX.0.0-" prefix implies that there is no parent tag, + // but the "+incompatible" suffix implies that the major version of + // the parent tag is not compatible with the module's import path. + // + // There are a few such entries in the index generated by proxy.golang.org, + // but we believe those entries were generated by the proxy itself. + return "", &InvalidVersionError{ + Version: v, + Pseudo: true, + Err: fmt.Errorf("lacks base version, but has build metadata %q", build), + } + } + return "", nil + + case "-0": + // vX.Y.(Z+1)-0.yyyymmddhhmmss-abcdef123456 → vX.Y.Z + // vX.Y.(Z+1)-0.yyyymmddhhmmss-abcdef123456+incompatible → vX.Y.Z+incompatible + base = strings.TrimSuffix(base, pre) + i := strings.LastIndexByte(base, '.') + if i < 0 { + panic("base from parsePseudoVersion missing patch number: " + base) + } + patch := decDecimal(base[i+1:]) + if patch == "" { + // vX.0.0-0 is invalid, but has been observed in the wild in the index + // generated by requests to proxy.golang.org. + // + // NOTE(bcmills): I cannot find a historical bug that accounts for + // pseudo-versions of this form, nor have I seen such versions in any + // actual go.mod files. If we find actual examples of this form and a + // reasonable theory of how they came into existence, it seems fine to + // treat them as equivalent to vX.0.0 (especially since the invalid + // pseudo-versions have lower precedence than the real ones). For now, we + // reject them. + return "", &InvalidVersionError{ + Version: v, + Pseudo: true, + Err: fmt.Errorf("version before %s would have negative patch number", base), + } + } + return base[:i+1] + patch + build, nil + + default: + // vX.Y.Z-pre.0.yyyymmddhhmmss-abcdef123456 → vX.Y.Z-pre + // vX.Y.Z-pre.0.yyyymmddhhmmss-abcdef123456+incompatible → vX.Y.Z-pre+incompatible + if !strings.HasSuffix(base, ".0") { + panic(`base from parsePseudoVersion missing ".0" before date: ` + base) + } + return strings.TrimSuffix(base, ".0") + build, nil + } +} + +var errPseudoSyntax = errors.New("syntax error") + +func parsePseudoVersion(v string) (base, timestamp, rev, build string, err error) { + if !IsPseudoVersion(v) { + return "", "", "", "", &InvalidVersionError{ + Version: v, + Pseudo: true, + Err: errPseudoSyntax, + } + } + build = semver.Build(v) + v = strings.TrimSuffix(v, build) + j := strings.LastIndex(v, "-") + v, rev = v[:j], v[j+1:] + i := strings.LastIndex(v, "-") + if j := strings.LastIndex(v, "."); j > i { + base = v[:j] // "vX.Y.Z-pre.0" or "vX.Y.(Z+1)-0" + timestamp = v[j+1:] + } else { + base = v[:i] // "vX.0.0" + timestamp = v[i+1:] + } + return base, timestamp, rev, build, nil +} diff --git a/backend/vendor/golang.org/x/net/html/charset/charset.go b/backend/vendor/golang.org/x/net/html/charset/charset.go new file mode 100644 index 0000000..13bed15 --- /dev/null +++ b/backend/vendor/golang.org/x/net/html/charset/charset.go @@ -0,0 +1,257 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package charset provides common text encodings for HTML documents. +// +// The mapping from encoding labels to encodings is defined at +// https://encoding.spec.whatwg.org/. +package charset // import "golang.org/x/net/html/charset" + +import ( + "bytes" + "fmt" + "io" + "mime" + "strings" + "unicode/utf8" + + "golang.org/x/net/html" + "golang.org/x/text/encoding" + "golang.org/x/text/encoding/charmap" + "golang.org/x/text/encoding/htmlindex" + "golang.org/x/text/transform" +) + +// Lookup returns the encoding with the specified label, and its canonical +// name. It returns nil and the empty string if label is not one of the +// standard encodings for HTML. Matching is case-insensitive and ignores +// leading and trailing whitespace. Encoders will use HTML escape sequences for +// runes that are not supported by the character set. +func Lookup(label string) (e encoding.Encoding, name string) { + e, err := htmlindex.Get(label) + if err != nil { + return nil, "" + } + name, _ = htmlindex.Name(e) + return &htmlEncoding{e}, name +} + +type htmlEncoding struct{ encoding.Encoding } + +func (h *htmlEncoding) NewEncoder() *encoding.Encoder { + // HTML requires a non-terminating legacy encoder. We use HTML escapes to + // substitute unsupported code points. + return encoding.HTMLEscapeUnsupported(h.Encoding.NewEncoder()) +} + +// DetermineEncoding determines the encoding of an HTML document by examining +// up to the first 1024 bytes of content and the declared Content-Type. +// +// See http://www.whatwg.org/specs/web-apps/current-work/multipage/parsing.html#determining-the-character-encoding +func DetermineEncoding(content []byte, contentType string) (e encoding.Encoding, name string, certain bool) { + if len(content) > 1024 { + content = content[:1024] + } + + for _, b := range boms { + if bytes.HasPrefix(content, b.bom) { + e, name = Lookup(b.enc) + return e, name, true + } + } + + if _, params, err := mime.ParseMediaType(contentType); err == nil { + if cs, ok := params["charset"]; ok { + if e, name = Lookup(cs); e != nil { + return e, name, true + } + } + } + + if len(content) > 0 { + e, name = prescan(content) + if e != nil { + return e, name, false + } + } + + // Try to detect UTF-8. + // First eliminate any partial rune at the end. + for i := len(content) - 1; i >= 0 && i > len(content)-4; i-- { + b := content[i] + if b < 0x80 { + break + } + if utf8.RuneStart(b) { + content = content[:i] + break + } + } + hasHighBit := false + for _, c := range content { + if c >= 0x80 { + hasHighBit = true + break + } + } + if hasHighBit && utf8.Valid(content) { + return encoding.Nop, "utf-8", false + } + + // TODO: change default depending on user's locale? + return charmap.Windows1252, "windows-1252", false +} + +// NewReader returns an io.Reader that converts the content of r to UTF-8. +// It calls DetermineEncoding to find out what r's encoding is. +func NewReader(r io.Reader, contentType string) (io.Reader, error) { + preview := make([]byte, 1024) + n, err := io.ReadFull(r, preview) + switch { + case err == io.ErrUnexpectedEOF: + preview = preview[:n] + r = bytes.NewReader(preview) + case err != nil: + return nil, err + default: + r = io.MultiReader(bytes.NewReader(preview), r) + } + + if e, _, _ := DetermineEncoding(preview, contentType); e != encoding.Nop { + r = transform.NewReader(r, e.NewDecoder()) + } + return r, nil +} + +// NewReaderLabel returns a reader that converts from the specified charset to +// UTF-8. It uses Lookup to find the encoding that corresponds to label, and +// returns an error if Lookup returns nil. It is suitable for use as +// encoding/xml.Decoder's CharsetReader function. +func NewReaderLabel(label string, input io.Reader) (io.Reader, error) { + e, _ := Lookup(label) + if e == nil { + return nil, fmt.Errorf("unsupported charset: %q", label) + } + return transform.NewReader(input, e.NewDecoder()), nil +} + +func prescan(content []byte) (e encoding.Encoding, name string) { + z := html.NewTokenizer(bytes.NewReader(content)) + for { + switch z.Next() { + case html.ErrorToken: + return nil, "" + + case html.StartTagToken, html.SelfClosingTagToken: + tagName, hasAttr := z.TagName() + if !bytes.Equal(tagName, []byte("meta")) { + continue + } + attrList := make(map[string]bool) + gotPragma := false + + const ( + dontKnow = iota + doNeedPragma + doNotNeedPragma + ) + needPragma := dontKnow + + name = "" + e = nil + for hasAttr { + var key, val []byte + key, val, hasAttr = z.TagAttr() + ks := string(key) + if attrList[ks] { + continue + } + attrList[ks] = true + for i, c := range val { + if 'A' <= c && c <= 'Z' { + val[i] = c + 0x20 + } + } + + switch ks { + case "http-equiv": + if bytes.Equal(val, []byte("content-type")) { + gotPragma = true + } + + case "content": + if e == nil { + name = fromMetaElement(string(val)) + if name != "" { + e, name = Lookup(name) + if e != nil { + needPragma = doNeedPragma + } + } + } + + case "charset": + e, name = Lookup(string(val)) + needPragma = doNotNeedPragma + } + } + + if needPragma == dontKnow || needPragma == doNeedPragma && !gotPragma { + continue + } + + if strings.HasPrefix(name, "utf-16") { + name = "utf-8" + e = encoding.Nop + } + + if e != nil { + return e, name + } + } + } +} + +func fromMetaElement(s string) string { + for s != "" { + csLoc := strings.Index(s, "charset") + if csLoc == -1 { + return "" + } + s = s[csLoc+len("charset"):] + s = strings.TrimLeft(s, " \t\n\f\r") + if !strings.HasPrefix(s, "=") { + continue + } + s = s[1:] + s = strings.TrimLeft(s, " \t\n\f\r") + if s == "" { + return "" + } + if q := s[0]; q == '"' || q == '\'' { + s = s[1:] + closeQuote := strings.IndexRune(s, rune(q)) + if closeQuote == -1 { + return "" + } + return s[:closeQuote] + } + + end := strings.IndexAny(s, "; \t\n\f\r") + if end == -1 { + end = len(s) + } + return s[:end] + } + return "" +} + +var boms = []struct { + bom []byte + enc string +}{ + {[]byte{0xfe, 0xff}, "utf-16be"}, + {[]byte{0xff, 0xfe}, "utf-16le"}, + {[]byte{0xef, 0xbb, 0xbf}, "utf-8"}, +} diff --git a/backend/vendor/golang.org/x/net/http/httpproxy/proxy.go b/backend/vendor/golang.org/x/net/http/httpproxy/proxy.go new file mode 100644 index 0000000..d89c257 --- /dev/null +++ b/backend/vendor/golang.org/x/net/http/httpproxy/proxy.go @@ -0,0 +1,373 @@ +// Copyright 2017 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package httpproxy provides support for HTTP proxy determination +// based on environment variables, as provided by net/http's +// ProxyFromEnvironment function. +// +// The API is not subject to the Go 1 compatibility promise and may change at +// any time. +package httpproxy + +import ( + "errors" + "fmt" + "net" + "net/netip" + "net/url" + "os" + "strings" + "unicode/utf8" + + "golang.org/x/net/idna" +) + +// Config holds configuration for HTTP proxy settings. See +// FromEnvironment for details. +type Config struct { + // HTTPProxy represents the value of the HTTP_PROXY or + // http_proxy environment variable. It will be used as the proxy + // URL for HTTP requests unless overridden by NoProxy. + HTTPProxy string + + // HTTPSProxy represents the HTTPS_PROXY or https_proxy + // environment variable. It will be used as the proxy URL for + // HTTPS requests unless overridden by NoProxy. + HTTPSProxy string + + // NoProxy represents the NO_PROXY or no_proxy environment + // variable. It specifies a string that contains comma-separated values + // specifying hosts that should be excluded from proxying. Each value is + // represented by an IP address prefix (1.2.3.4), an IP address prefix in + // CIDR notation (1.2.3.4/8), a domain name, or a special DNS label (*). + // An IP address prefix and domain name can also include a literal port + // number (1.2.3.4:80). + // A domain name matches that name and all subdomains. A domain name with + // a leading "." matches subdomains only. For example "foo.com" matches + // "foo.com" and "bar.foo.com"; ".y.com" matches "x.y.com" but not "y.com". + // A single asterisk (*) indicates that no proxying should be done. + // A best effort is made to parse the string and errors are + // ignored. + NoProxy string + + // CGI holds whether the current process is running + // as a CGI handler (FromEnvironment infers this from the + // presence of a REQUEST_METHOD environment variable). + // When this is set, ProxyForURL will return an error + // when HTTPProxy applies, because a client could be + // setting HTTP_PROXY maliciously. See https://golang.org/s/cgihttpproxy. + CGI bool +} + +// config holds the parsed configuration for HTTP proxy settings. +type config struct { + // Config represents the original configuration as defined above. + Config + + // httpsProxy is the parsed URL of the HTTPSProxy if defined. + httpsProxy *url.URL + + // httpProxy is the parsed URL of the HTTPProxy if defined. + httpProxy *url.URL + + // ipMatchers represent all values in the NoProxy that are IP address + // prefixes or an IP address in CIDR notation. + ipMatchers []matcher + + // domainMatchers represent all values in the NoProxy that are a domain + // name or hostname & domain name + domainMatchers []matcher +} + +// FromEnvironment returns a Config instance populated from the +// environment variables HTTP_PROXY, HTTPS_PROXY and NO_PROXY (or the +// lowercase versions thereof). +// +// The environment values may be either a complete URL or a +// "host[:port]", in which case the "http" scheme is assumed. An error +// is returned if the value is a different form. +func FromEnvironment() *Config { + return &Config{ + HTTPProxy: getEnvAny("HTTP_PROXY", "http_proxy"), + HTTPSProxy: getEnvAny("HTTPS_PROXY", "https_proxy"), + NoProxy: getEnvAny("NO_PROXY", "no_proxy"), + CGI: os.Getenv("REQUEST_METHOD") != "", + } +} + +func getEnvAny(names ...string) string { + for _, n := range names { + if val := os.Getenv(n); val != "" { + return val + } + } + return "" +} + +// ProxyFunc returns a function that determines the proxy URL to use for +// a given request URL. Changing the contents of cfg will not affect +// proxy functions created earlier. +// +// A nil URL and nil error are returned if no proxy is defined in the +// environment, or a proxy should not be used for the given request, as +// defined by NO_PROXY. +// +// As a special case, if req.URL.Host is "localhost" or a loopback address +// (with or without a port number), then a nil URL and nil error will be returned. +func (cfg *Config) ProxyFunc() func(reqURL *url.URL) (*url.URL, error) { + // Preprocess the Config settings for more efficient evaluation. + cfg1 := &config{ + Config: *cfg, + } + cfg1.init() + return cfg1.proxyForURL +} + +func (cfg *config) proxyForURL(reqURL *url.URL) (*url.URL, error) { + var proxy *url.URL + if reqURL.Scheme == "https" { + proxy = cfg.httpsProxy + } else if reqURL.Scheme == "http" { + proxy = cfg.httpProxy + if proxy != nil && cfg.CGI { + return nil, errors.New("refusing to use HTTP_PROXY value in CGI environment; see golang.org/s/cgihttpproxy") + } + } + if proxy == nil { + return nil, nil + } + if !cfg.useProxy(canonicalAddr(reqURL)) { + return nil, nil + } + + return proxy, nil +} + +func parseProxy(proxy string) (*url.URL, error) { + if proxy == "" { + return nil, nil + } + + proxyURL, err := url.Parse(proxy) + if err != nil || proxyURL.Scheme == "" || proxyURL.Host == "" { + // proxy was bogus. Try prepending "http://" to it and + // see if that parses correctly. If not, we fall + // through and complain about the original one. + if proxyURL, err := url.Parse("http://" + proxy); err == nil { + return proxyURL, nil + } + } + if err != nil { + return nil, fmt.Errorf("invalid proxy address %q: %v", proxy, err) + } + return proxyURL, nil +} + +// useProxy reports whether requests to addr should use a proxy, +// according to the NO_PROXY or no_proxy environment variable. +// addr is always a canonicalAddr with a host and port. +func (cfg *config) useProxy(addr string) bool { + if len(addr) == 0 { + return true + } + host, port, err := net.SplitHostPort(addr) + if err != nil { + return false + } + if host == "localhost" { + return false + } + nip, err := netip.ParseAddr(host) + var ip net.IP + if err == nil { + ip = net.IP(nip.AsSlice()) + if ip.IsLoopback() { + return false + } + } + + addr = strings.ToLower(strings.TrimSpace(host)) + + if ip != nil { + for _, m := range cfg.ipMatchers { + if m.match(addr, port, ip) { + return false + } + } + } + for _, m := range cfg.domainMatchers { + if m.match(addr, port, ip) { + return false + } + } + return true +} + +func (c *config) init() { + if parsed, err := parseProxy(c.HTTPProxy); err == nil { + c.httpProxy = parsed + } + if parsed, err := parseProxy(c.HTTPSProxy); err == nil { + c.httpsProxy = parsed + } + + for _, p := range strings.Split(c.NoProxy, ",") { + p = strings.ToLower(strings.TrimSpace(p)) + if len(p) == 0 { + continue + } + + if p == "*" { + c.ipMatchers = []matcher{allMatch{}} + c.domainMatchers = []matcher{allMatch{}} + return + } + + // IPv4/CIDR, IPv6/CIDR + if _, pnet, err := net.ParseCIDR(p); err == nil { + c.ipMatchers = append(c.ipMatchers, cidrMatch{cidr: pnet}) + continue + } + + // IPv4:port, [IPv6]:port + phost, pport, err := net.SplitHostPort(p) + if err == nil { + if len(phost) == 0 { + // There is no host part, likely the entry is malformed; ignore. + continue + } + if phost[0] == '[' && phost[len(phost)-1] == ']' { + phost = phost[1 : len(phost)-1] + } + } else { + phost = p + } + // IPv4, IPv6 + if pip := net.ParseIP(phost); pip != nil { + c.ipMatchers = append(c.ipMatchers, ipMatch{ip: pip, port: pport}) + continue + } + + if len(phost) == 0 { + // There is no host part, likely the entry is malformed; ignore. + continue + } + + // domain.com or domain.com:80 + // foo.com matches bar.foo.com + // .domain.com or .domain.com:port + // *.domain.com or *.domain.com:port + if strings.HasPrefix(phost, "*.") { + phost = phost[1:] + } + matchHost := false + if phost[0] != '.' { + matchHost = true + phost = "." + phost + } + if v, err := idnaASCII(phost); err == nil { + phost = v + } + c.domainMatchers = append(c.domainMatchers, domainMatch{host: phost, port: pport, matchHost: matchHost}) + } +} + +var portMap = map[string]string{ + "http": "80", + "https": "443", + "socks5": "1080", +} + +// canonicalAddr returns url.Host but always with a ":port" suffix +func canonicalAddr(url *url.URL) string { + addr := url.Hostname() + if v, err := idnaASCII(addr); err == nil { + addr = v + } + port := url.Port() + if port == "" { + port = portMap[url.Scheme] + } + return net.JoinHostPort(addr, port) +} + +// Given a string of the form "host", "host:port", or "[ipv6::address]:port", +// return true if the string includes a port. +func hasPort(s string) bool { return strings.LastIndex(s, ":") > strings.LastIndex(s, "]") } + +func idnaASCII(v string) (string, error) { + // TODO: Consider removing this check after verifying performance is okay. + // Right now punycode verification, length checks, context checks, and the + // permissible character tests are all omitted. It also prevents the ToASCII + // call from salvaging an invalid IDN, when possible. As a result it may be + // possible to have two IDNs that appear identical to the user where the + // ASCII-only version causes an error downstream whereas the non-ASCII + // version does not. + // Note that for correct ASCII IDNs ToASCII will only do considerably more + // work, but it will not cause an allocation. + if isASCII(v) { + return v, nil + } + return idna.Lookup.ToASCII(v) +} + +func isASCII(s string) bool { + for i := 0; i < len(s); i++ { + if s[i] >= utf8.RuneSelf { + return false + } + } + return true +} + +// matcher represents the matching rule for a given value in the NO_PROXY list +type matcher interface { + // match returns true if the host and optional port or ip and optional port + // are allowed + match(host, port string, ip net.IP) bool +} + +// allMatch matches on all possible inputs +type allMatch struct{} + +func (a allMatch) match(host, port string, ip net.IP) bool { + return true +} + +type cidrMatch struct { + cidr *net.IPNet +} + +func (m cidrMatch) match(host, port string, ip net.IP) bool { + return m.cidr.Contains(ip) +} + +type ipMatch struct { + ip net.IP + port string +} + +func (m ipMatch) match(host, port string, ip net.IP) bool { + if m.ip.Equal(ip) { + return m.port == "" || m.port == port + } + return false +} + +type domainMatch struct { + host string + port string + + matchHost bool +} + +func (m domainMatch) match(host, port string, ip net.IP) bool { + if ip != nil { + return false + } + if strings.HasSuffix(host, m.host) || (m.matchHost && host == m.host[1:]) { + return m.port == "" || m.port == port + } + return false +} diff --git a/backend/vendor/golang.org/x/net/http2/config_go125.go b/backend/vendor/golang.org/x/net/http2/config_go125.go new file mode 100644 index 0000000..b4373fe --- /dev/null +++ b/backend/vendor/golang.org/x/net/http2/config_go125.go @@ -0,0 +1,15 @@ +// Copyright 2025 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build !go1.26 + +package http2 + +import ( + "net/http" +) + +func http2ConfigStrictMaxConcurrentRequests(h2 *http.HTTP2Config) bool { + return false +} diff --git a/backend/vendor/golang.org/x/net/http2/config_go126.go b/backend/vendor/golang.org/x/net/http2/config_go126.go new file mode 100644 index 0000000..6b071c1 --- /dev/null +++ b/backend/vendor/golang.org/x/net/http2/config_go126.go @@ -0,0 +1,15 @@ +// Copyright 2025 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build go1.26 + +package http2 + +import ( + "net/http" +) + +func http2ConfigStrictMaxConcurrentRequests(h2 *http.HTTP2Config) bool { + return h2.StrictMaxConcurrentRequests +} diff --git a/backend/vendor/golang.org/x/net/http2/writesched_priority_rfc7540.go b/backend/vendor/golang.org/x/net/http2/writesched_priority_rfc7540.go new file mode 100644 index 0000000..6d24d6a --- /dev/null +++ b/backend/vendor/golang.org/x/net/http2/writesched_priority_rfc7540.go @@ -0,0 +1,451 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "fmt" + "math" + "sort" +) + +// RFC 7540, Section 5.3.5: the default weight is 16. +const priorityDefaultWeightRFC7540 = 15 // 16 = 15 + 1 + +// PriorityWriteSchedulerConfig configures a priorityWriteScheduler. +type PriorityWriteSchedulerConfig struct { + // MaxClosedNodesInTree controls the maximum number of closed streams to + // retain in the priority tree. Setting this to zero saves a small amount + // of memory at the cost of performance. + // + // See RFC 7540, Section 5.3.4: + // "It is possible for a stream to become closed while prioritization + // information ... is in transit. ... This potentially creates suboptimal + // prioritization, since the stream could be given a priority that is + // different from what is intended. To avoid these problems, an endpoint + // SHOULD retain stream prioritization state for a period after streams + // become closed. The longer state is retained, the lower the chance that + // streams are assigned incorrect or default priority values." + MaxClosedNodesInTree int + + // MaxIdleNodesInTree controls the maximum number of idle streams to + // retain in the priority tree. Setting this to zero saves a small amount + // of memory at the cost of performance. + // + // See RFC 7540, Section 5.3.4: + // Similarly, streams that are in the "idle" state can be assigned + // priority or become a parent of other streams. This allows for the + // creation of a grouping node in the dependency tree, which enables + // more flexible expressions of priority. Idle streams begin with a + // default priority (Section 5.3.5). + MaxIdleNodesInTree int + + // ThrottleOutOfOrderWrites enables write throttling to help ensure that + // data is delivered in priority order. This works around a race where + // stream B depends on stream A and both streams are about to call Write + // to queue DATA frames. If B wins the race, a naive scheduler would eagerly + // write as much data from B as possible, but this is suboptimal because A + // is a higher-priority stream. With throttling enabled, we write a small + // amount of data from B to minimize the amount of bandwidth that B can + // steal from A. + ThrottleOutOfOrderWrites bool +} + +// NewPriorityWriteScheduler constructs a WriteScheduler that schedules +// frames by following HTTP/2 priorities as described in RFC 7540 Section 5.3. +// If cfg is nil, default options are used. +func NewPriorityWriteScheduler(cfg *PriorityWriteSchedulerConfig) WriteScheduler { + if cfg == nil { + // For justification of these defaults, see: + // https://docs.google.com/document/d/1oLhNg1skaWD4_DtaoCxdSRN5erEXrH-KnLrMwEpOtFY + cfg = &PriorityWriteSchedulerConfig{ + MaxClosedNodesInTree: 10, + MaxIdleNodesInTree: 10, + ThrottleOutOfOrderWrites: false, + } + } + + ws := &priorityWriteSchedulerRFC7540{ + nodes: make(map[uint32]*priorityNodeRFC7540), + maxClosedNodesInTree: cfg.MaxClosedNodesInTree, + maxIdleNodesInTree: cfg.MaxIdleNodesInTree, + enableWriteThrottle: cfg.ThrottleOutOfOrderWrites, + } + ws.nodes[0] = &ws.root + if cfg.ThrottleOutOfOrderWrites { + ws.writeThrottleLimit = 1024 + } else { + ws.writeThrottleLimit = math.MaxInt32 + } + return ws +} + +type priorityNodeStateRFC7540 int + +const ( + priorityNodeOpenRFC7540 priorityNodeStateRFC7540 = iota + priorityNodeClosedRFC7540 + priorityNodeIdleRFC7540 +) + +// priorityNodeRFC7540 is a node in an HTTP/2 priority tree. +// Each node is associated with a single stream ID. +// See RFC 7540, Section 5.3. +type priorityNodeRFC7540 struct { + q writeQueue // queue of pending frames to write + id uint32 // id of the stream, or 0 for the root of the tree + weight uint8 // the actual weight is weight+1, so the value is in [1,256] + state priorityNodeStateRFC7540 // open | closed | idle + bytes int64 // number of bytes written by this node, or 0 if closed + subtreeBytes int64 // sum(node.bytes) of all nodes in this subtree + + // These links form the priority tree. + parent *priorityNodeRFC7540 + kids *priorityNodeRFC7540 // start of the kids list + prev, next *priorityNodeRFC7540 // doubly-linked list of siblings +} + +func (n *priorityNodeRFC7540) setParent(parent *priorityNodeRFC7540) { + if n == parent { + panic("setParent to self") + } + if n.parent == parent { + return + } + // Unlink from current parent. + if parent := n.parent; parent != nil { + if n.prev == nil { + parent.kids = n.next + } else { + n.prev.next = n.next + } + if n.next != nil { + n.next.prev = n.prev + } + } + // Link to new parent. + // If parent=nil, remove n from the tree. + // Always insert at the head of parent.kids (this is assumed by walkReadyInOrder). + n.parent = parent + if parent == nil { + n.next = nil + n.prev = nil + } else { + n.next = parent.kids + n.prev = nil + if n.next != nil { + n.next.prev = n + } + parent.kids = n + } +} + +func (n *priorityNodeRFC7540) addBytes(b int64) { + n.bytes += b + for ; n != nil; n = n.parent { + n.subtreeBytes += b + } +} + +// walkReadyInOrder iterates over the tree in priority order, calling f for each node +// with a non-empty write queue. When f returns true, this function returns true and the +// walk halts. tmp is used as scratch space for sorting. +// +// f(n, openParent) takes two arguments: the node to visit, n, and a bool that is true +// if any ancestor p of n is still open (ignoring the root node). +func (n *priorityNodeRFC7540) walkReadyInOrder(openParent bool, tmp *[]*priorityNodeRFC7540, f func(*priorityNodeRFC7540, bool) bool) bool { + if !n.q.empty() && f(n, openParent) { + return true + } + if n.kids == nil { + return false + } + + // Don't consider the root "open" when updating openParent since + // we can't send data frames on the root stream (only control frames). + if n.id != 0 { + openParent = openParent || (n.state == priorityNodeOpenRFC7540) + } + + // Common case: only one kid or all kids have the same weight. + // Some clients don't use weights; other clients (like web browsers) + // use mostly-linear priority trees. + w := n.kids.weight + needSort := false + for k := n.kids.next; k != nil; k = k.next { + if k.weight != w { + needSort = true + break + } + } + if !needSort { + for k := n.kids; k != nil; k = k.next { + if k.walkReadyInOrder(openParent, tmp, f) { + return true + } + } + return false + } + + // Uncommon case: sort the child nodes. We remove the kids from the parent, + // then re-insert after sorting so we can reuse tmp for future sort calls. + *tmp = (*tmp)[:0] + for n.kids != nil { + *tmp = append(*tmp, n.kids) + n.kids.setParent(nil) + } + sort.Sort(sortPriorityNodeSiblingsRFC7540(*tmp)) + for i := len(*tmp) - 1; i >= 0; i-- { + (*tmp)[i].setParent(n) // setParent inserts at the head of n.kids + } + for k := n.kids; k != nil; k = k.next { + if k.walkReadyInOrder(openParent, tmp, f) { + return true + } + } + return false +} + +type sortPriorityNodeSiblingsRFC7540 []*priorityNodeRFC7540 + +func (z sortPriorityNodeSiblingsRFC7540) Len() int { return len(z) } +func (z sortPriorityNodeSiblingsRFC7540) Swap(i, k int) { z[i], z[k] = z[k], z[i] } +func (z sortPriorityNodeSiblingsRFC7540) Less(i, k int) bool { + // Prefer the subtree that has sent fewer bytes relative to its weight. + // See sections 5.3.2 and 5.3.4. + wi, bi := float64(z[i].weight+1), float64(z[i].subtreeBytes) + wk, bk := float64(z[k].weight+1), float64(z[k].subtreeBytes) + if bi == 0 && bk == 0 { + return wi >= wk + } + if bk == 0 { + return false + } + return bi/bk <= wi/wk +} + +type priorityWriteSchedulerRFC7540 struct { + // root is the root of the priority tree, where root.id = 0. + // The root queues control frames that are not associated with any stream. + root priorityNodeRFC7540 + + // nodes maps stream ids to priority tree nodes. + nodes map[uint32]*priorityNodeRFC7540 + + // maxID is the maximum stream id in nodes. + maxID uint32 + + // lists of nodes that have been closed or are idle, but are kept in + // the tree for improved prioritization. When the lengths exceed either + // maxClosedNodesInTree or maxIdleNodesInTree, old nodes are discarded. + closedNodes, idleNodes []*priorityNodeRFC7540 + + // From the config. + maxClosedNodesInTree int + maxIdleNodesInTree int + writeThrottleLimit int32 + enableWriteThrottle bool + + // tmp is scratch space for priorityNode.walkReadyInOrder to reduce allocations. + tmp []*priorityNodeRFC7540 + + // pool of empty queues for reuse. + queuePool writeQueuePool +} + +func (ws *priorityWriteSchedulerRFC7540) OpenStream(streamID uint32, options OpenStreamOptions) { + // The stream may be currently idle but cannot be opened or closed. + if curr := ws.nodes[streamID]; curr != nil { + if curr.state != priorityNodeIdleRFC7540 { + panic(fmt.Sprintf("stream %d already opened", streamID)) + } + curr.state = priorityNodeOpenRFC7540 + return + } + + // RFC 7540, Section 5.3.5: + // "All streams are initially assigned a non-exclusive dependency on stream 0x0. + // Pushed streams initially depend on their associated stream. In both cases, + // streams are assigned a default weight of 16." + parent := ws.nodes[options.PusherID] + if parent == nil { + parent = &ws.root + } + n := &priorityNodeRFC7540{ + q: *ws.queuePool.get(), + id: streamID, + weight: priorityDefaultWeightRFC7540, + state: priorityNodeOpenRFC7540, + } + n.setParent(parent) + ws.nodes[streamID] = n + if streamID > ws.maxID { + ws.maxID = streamID + } +} + +func (ws *priorityWriteSchedulerRFC7540) CloseStream(streamID uint32) { + if streamID == 0 { + panic("violation of WriteScheduler interface: cannot close stream 0") + } + if ws.nodes[streamID] == nil { + panic(fmt.Sprintf("violation of WriteScheduler interface: unknown stream %d", streamID)) + } + if ws.nodes[streamID].state != priorityNodeOpenRFC7540 { + panic(fmt.Sprintf("violation of WriteScheduler interface: stream %d already closed", streamID)) + } + + n := ws.nodes[streamID] + n.state = priorityNodeClosedRFC7540 + n.addBytes(-n.bytes) + + q := n.q + ws.queuePool.put(&q) + n.q.s = nil + if ws.maxClosedNodesInTree > 0 { + ws.addClosedOrIdleNode(&ws.closedNodes, ws.maxClosedNodesInTree, n) + } else { + ws.removeNode(n) + } +} + +func (ws *priorityWriteSchedulerRFC7540) AdjustStream(streamID uint32, priority PriorityParam) { + if streamID == 0 { + panic("adjustPriority on root") + } + + // If streamID does not exist, there are two cases: + // - A closed stream that has been removed (this will have ID <= maxID) + // - An idle stream that is being used for "grouping" (this will have ID > maxID) + n := ws.nodes[streamID] + if n == nil { + if streamID <= ws.maxID || ws.maxIdleNodesInTree == 0 { + return + } + ws.maxID = streamID + n = &priorityNodeRFC7540{ + q: *ws.queuePool.get(), + id: streamID, + weight: priorityDefaultWeightRFC7540, + state: priorityNodeIdleRFC7540, + } + n.setParent(&ws.root) + ws.nodes[streamID] = n + ws.addClosedOrIdleNode(&ws.idleNodes, ws.maxIdleNodesInTree, n) + } + + // Section 5.3.1: A dependency on a stream that is not currently in the tree + // results in that stream being given a default priority (Section 5.3.5). + parent := ws.nodes[priority.StreamDep] + if parent == nil { + n.setParent(&ws.root) + n.weight = priorityDefaultWeightRFC7540 + return + } + + // Ignore if the client tries to make a node its own parent. + if n == parent { + return + } + + // Section 5.3.3: + // "If a stream is made dependent on one of its own dependencies, the + // formerly dependent stream is first moved to be dependent on the + // reprioritized stream's previous parent. The moved dependency retains + // its weight." + // + // That is: if parent depends on n, move parent to depend on n.parent. + for x := parent.parent; x != nil; x = x.parent { + if x == n { + parent.setParent(n.parent) + break + } + } + + // Section 5.3.3: The exclusive flag causes the stream to become the sole + // dependency of its parent stream, causing other dependencies to become + // dependent on the exclusive stream. + if priority.Exclusive { + k := parent.kids + for k != nil { + next := k.next + if k != n { + k.setParent(n) + } + k = next + } + } + + n.setParent(parent) + n.weight = priority.Weight +} + +func (ws *priorityWriteSchedulerRFC7540) Push(wr FrameWriteRequest) { + var n *priorityNodeRFC7540 + if wr.isControl() { + n = &ws.root + } else { + id := wr.StreamID() + n = ws.nodes[id] + if n == nil { + // id is an idle or closed stream. wr should not be a HEADERS or + // DATA frame. In other case, we push wr onto the root, rather + // than creating a new priorityNode. + if wr.DataSize() > 0 { + panic("add DATA on non-open stream") + } + n = &ws.root + } + } + n.q.push(wr) +} + +func (ws *priorityWriteSchedulerRFC7540) Pop() (wr FrameWriteRequest, ok bool) { + ws.root.walkReadyInOrder(false, &ws.tmp, func(n *priorityNodeRFC7540, openParent bool) bool { + limit := int32(math.MaxInt32) + if openParent { + limit = ws.writeThrottleLimit + } + wr, ok = n.q.consume(limit) + if !ok { + return false + } + n.addBytes(int64(wr.DataSize())) + // If B depends on A and B continuously has data available but A + // does not, gradually increase the throttling limit to allow B to + // steal more and more bandwidth from A. + if openParent { + ws.writeThrottleLimit += 1024 + if ws.writeThrottleLimit < 0 { + ws.writeThrottleLimit = math.MaxInt32 + } + } else if ws.enableWriteThrottle { + ws.writeThrottleLimit = 1024 + } + return true + }) + return wr, ok +} + +func (ws *priorityWriteSchedulerRFC7540) addClosedOrIdleNode(list *[]*priorityNodeRFC7540, maxSize int, n *priorityNodeRFC7540) { + if maxSize == 0 { + return + } + if len(*list) == maxSize { + // Remove the oldest node, then shift left. + ws.removeNode((*list)[0]) + x := (*list)[1:] + copy(*list, x) + *list = (*list)[:len(x)] + } + *list = append(*list, n) +} + +func (ws *priorityWriteSchedulerRFC7540) removeNode(n *priorityNodeRFC7540) { + for n.kids != nil { + n.kids.setParent(n.parent) + } + n.setParent(nil) + delete(ws.nodes, n.id) +} diff --git a/backend/vendor/golang.org/x/net/http2/writesched_priority_rfc9128.go b/backend/vendor/golang.org/x/net/http2/writesched_priority_rfc9128.go new file mode 100644 index 0000000..9b5b880 --- /dev/null +++ b/backend/vendor/golang.org/x/net/http2/writesched_priority_rfc9128.go @@ -0,0 +1,209 @@ +// Copyright 2025 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package http2 + +import ( + "fmt" + "math" +) + +type streamMetadata struct { + location *writeQueue + priority PriorityParam +} + +type priorityWriteSchedulerRFC9218 struct { + // control contains control frames (SETTINGS, PING, etc.). + control writeQueue + + // heads contain the head of a circular list of streams. + // We put these heads within a nested array that represents urgency and + // incremental, as defined in + // https://www.rfc-editor.org/rfc/rfc9218.html#name-priority-parameters. + // 8 represents u=0 up to u=7, and 2 represents i=false and i=true. + heads [8][2]*writeQueue + + // streams contains a mapping between each stream ID and their metadata, so + // we can quickly locate them when needing to, for example, adjust their + // priority. + streams map[uint32]streamMetadata + + // queuePool are empty queues for reuse. + queuePool writeQueuePool + + // prioritizeIncremental is used to determine whether we should prioritize + // incremental streams or not, when urgency is the same in a given Pop() + // call. + prioritizeIncremental bool +} + +func newPriorityWriteSchedulerRFC9128() WriteScheduler { + ws := &priorityWriteSchedulerRFC9218{ + streams: make(map[uint32]streamMetadata), + } + return ws +} + +func (ws *priorityWriteSchedulerRFC9218) OpenStream(streamID uint32, opt OpenStreamOptions) { + if ws.streams[streamID].location != nil { + panic(fmt.Errorf("stream %d already opened", streamID)) + } + q := ws.queuePool.get() + ws.streams[streamID] = streamMetadata{ + location: q, + priority: opt.priority, + } + + u, i := opt.priority.urgency, opt.priority.incremental + if ws.heads[u][i] == nil { + ws.heads[u][i] = q + q.next = q + q.prev = q + } else { + // Queues are stored in a ring. + // Insert the new stream before ws.head, putting it at the end of the list. + q.prev = ws.heads[u][i].prev + q.next = ws.heads[u][i] + q.prev.next = q + q.next.prev = q + } +} + +func (ws *priorityWriteSchedulerRFC9218) CloseStream(streamID uint32) { + metadata := ws.streams[streamID] + q, u, i := metadata.location, metadata.priority.urgency, metadata.priority.incremental + if q == nil { + return + } + if q.next == q { + // This was the only open stream. + ws.heads[u][i] = nil + } else { + q.prev.next = q.next + q.next.prev = q.prev + if ws.heads[u][i] == q { + ws.heads[u][i] = q.next + } + } + delete(ws.streams, streamID) + ws.queuePool.put(q) +} + +func (ws *priorityWriteSchedulerRFC9218) AdjustStream(streamID uint32, priority PriorityParam) { + metadata := ws.streams[streamID] + q, u, i := metadata.location, metadata.priority.urgency, metadata.priority.incremental + if q == nil { + return + } + + // Remove stream from current location. + if q.next == q { + // This was the only open stream. + ws.heads[u][i] = nil + } else { + q.prev.next = q.next + q.next.prev = q.prev + if ws.heads[u][i] == q { + ws.heads[u][i] = q.next + } + } + + // Insert stream to the new queue. + u, i = priority.urgency, priority.incremental + if ws.heads[u][i] == nil { + ws.heads[u][i] = q + q.next = q + q.prev = q + } else { + // Queues are stored in a ring. + // Insert the new stream before ws.head, putting it at the end of the list. + q.prev = ws.heads[u][i].prev + q.next = ws.heads[u][i] + q.prev.next = q + q.next.prev = q + } + + // Update the metadata. + ws.streams[streamID] = streamMetadata{ + location: q, + priority: priority, + } +} + +func (ws *priorityWriteSchedulerRFC9218) Push(wr FrameWriteRequest) { + if wr.isControl() { + ws.control.push(wr) + return + } + q := ws.streams[wr.StreamID()].location + if q == nil { + // This is a closed stream. + // wr should not be a HEADERS or DATA frame. + // We push the request onto the control queue. + if wr.DataSize() > 0 { + panic("add DATA on non-open stream") + } + ws.control.push(wr) + return + } + q.push(wr) +} + +func (ws *priorityWriteSchedulerRFC9218) Pop() (FrameWriteRequest, bool) { + // Control and RST_STREAM frames first. + if !ws.control.empty() { + return ws.control.shift(), true + } + + // On the next Pop(), we want to prioritize incremental if we prioritized + // non-incremental request of the same urgency this time. Vice-versa. + // i.e. when there are incremental and non-incremental requests at the same + // priority, we give 50% of our bandwidth to the incremental ones in + // aggregate and 50% to the first non-incremental one (since + // non-incremental streams do not use round-robin writes). + ws.prioritizeIncremental = !ws.prioritizeIncremental + + // Always prioritize lowest u (i.e. highest urgency level). + for u := range ws.heads { + for i := range ws.heads[u] { + // When we want to prioritize incremental, we try to pop i=true + // first before i=false when u is the same. + if ws.prioritizeIncremental { + i = (i + 1) % 2 + } + q := ws.heads[u][i] + if q == nil { + continue + } + for { + if wr, ok := q.consume(math.MaxInt32); ok { + if i == 1 { + // For incremental streams, we update head to q.next so + // we can round-robin between multiple streams that can + // immediately benefit from partial writes. + ws.heads[u][i] = q.next + } else { + // For non-incremental streams, we try to finish one to + // completion rather than doing round-robin. However, + // we update head here so that if q.consume() is !ok + // (e.g. the stream has no more frame to consume), head + // is updated to the next q that has frames to consume + // on future iterations. This way, we do not prioritize + // writing to unavailable stream on next Pop() calls, + // preventing head-of-line blocking. + ws.heads[u][i] = q + } + return wr, true + } + q = q.next + if q == ws.heads[u][i] { + break + } + } + + } + } + return FrameWriteRequest{}, false +} diff --git a/backend/vendor/golang.org/x/net/internal/socks/client.go b/backend/vendor/golang.org/x/net/internal/socks/client.go new file mode 100644 index 0000000..3d6f516 --- /dev/null +++ b/backend/vendor/golang.org/x/net/internal/socks/client.go @@ -0,0 +1,168 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package socks + +import ( + "context" + "errors" + "io" + "net" + "strconv" + "time" +) + +var ( + noDeadline = time.Time{} + aLongTimeAgo = time.Unix(1, 0) +) + +func (d *Dialer) connect(ctx context.Context, c net.Conn, address string) (_ net.Addr, ctxErr error) { + host, port, err := splitHostPort(address) + if err != nil { + return nil, err + } + if deadline, ok := ctx.Deadline(); ok && !deadline.IsZero() { + c.SetDeadline(deadline) + defer c.SetDeadline(noDeadline) + } + if ctx != context.Background() { + errCh := make(chan error, 1) + done := make(chan struct{}) + defer func() { + close(done) + if ctxErr == nil { + ctxErr = <-errCh + } + }() + go func() { + select { + case <-ctx.Done(): + c.SetDeadline(aLongTimeAgo) + errCh <- ctx.Err() + case <-done: + errCh <- nil + } + }() + } + + b := make([]byte, 0, 6+len(host)) // the size here is just an estimate + b = append(b, Version5) + if len(d.AuthMethods) == 0 || d.Authenticate == nil { + b = append(b, 1, byte(AuthMethodNotRequired)) + } else { + ams := d.AuthMethods + if len(ams) > 255 { + return nil, errors.New("too many authentication methods") + } + b = append(b, byte(len(ams))) + for _, am := range ams { + b = append(b, byte(am)) + } + } + if _, ctxErr = c.Write(b); ctxErr != nil { + return + } + + if _, ctxErr = io.ReadFull(c, b[:2]); ctxErr != nil { + return + } + if b[0] != Version5 { + return nil, errors.New("unexpected protocol version " + strconv.Itoa(int(b[0]))) + } + am := AuthMethod(b[1]) + if am == AuthMethodNoAcceptableMethods { + return nil, errors.New("no acceptable authentication methods") + } + if d.Authenticate != nil { + if ctxErr = d.Authenticate(ctx, c, am); ctxErr != nil { + return + } + } + + b = b[:0] + b = append(b, Version5, byte(d.cmd), 0) + if ip := net.ParseIP(host); ip != nil { + if ip4 := ip.To4(); ip4 != nil { + b = append(b, AddrTypeIPv4) + b = append(b, ip4...) + } else if ip6 := ip.To16(); ip6 != nil { + b = append(b, AddrTypeIPv6) + b = append(b, ip6...) + } else { + return nil, errors.New("unknown address type") + } + } else { + if len(host) > 255 { + return nil, errors.New("FQDN too long") + } + b = append(b, AddrTypeFQDN) + b = append(b, byte(len(host))) + b = append(b, host...) + } + b = append(b, byte(port>>8), byte(port)) + if _, ctxErr = c.Write(b); ctxErr != nil { + return + } + + if _, ctxErr = io.ReadFull(c, b[:4]); ctxErr != nil { + return + } + if b[0] != Version5 { + return nil, errors.New("unexpected protocol version " + strconv.Itoa(int(b[0]))) + } + if cmdErr := Reply(b[1]); cmdErr != StatusSucceeded { + return nil, errors.New("unknown error " + cmdErr.String()) + } + if b[2] != 0 { + return nil, errors.New("non-zero reserved field") + } + l := 2 + var a Addr + switch b[3] { + case AddrTypeIPv4: + l += net.IPv4len + a.IP = make(net.IP, net.IPv4len) + case AddrTypeIPv6: + l += net.IPv6len + a.IP = make(net.IP, net.IPv6len) + case AddrTypeFQDN: + if _, err := io.ReadFull(c, b[:1]); err != nil { + return nil, err + } + l += int(b[0]) + default: + return nil, errors.New("unknown address type " + strconv.Itoa(int(b[3]))) + } + if cap(b) < l { + b = make([]byte, l) + } else { + b = b[:l] + } + if _, ctxErr = io.ReadFull(c, b); ctxErr != nil { + return + } + if a.IP != nil { + copy(a.IP, b) + } else { + a.Name = string(b[:len(b)-2]) + } + a.Port = int(b[len(b)-2])<<8 | int(b[len(b)-1]) + return &a, nil +} + +func splitHostPort(address string) (string, int, error) { + host, port, err := net.SplitHostPort(address) + if err != nil { + return "", 0, err + } + portnum, err := strconv.Atoi(port) + if err != nil { + return "", 0, err + } + if 1 > portnum || portnum > 0xffff { + return "", 0, errors.New("port number out of range " + port) + } + return host, portnum, nil +} diff --git a/backend/vendor/golang.org/x/net/internal/socks/socks.go b/backend/vendor/golang.org/x/net/internal/socks/socks.go new file mode 100644 index 0000000..8eedb84 --- /dev/null +++ b/backend/vendor/golang.org/x/net/internal/socks/socks.go @@ -0,0 +1,317 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package socks provides a SOCKS version 5 client implementation. +// +// SOCKS protocol version 5 is defined in RFC 1928. +// Username/Password authentication for SOCKS version 5 is defined in +// RFC 1929. +package socks + +import ( + "context" + "errors" + "io" + "net" + "strconv" +) + +// A Command represents a SOCKS command. +type Command int + +func (cmd Command) String() string { + switch cmd { + case CmdConnect: + return "socks connect" + case cmdBind: + return "socks bind" + default: + return "socks " + strconv.Itoa(int(cmd)) + } +} + +// An AuthMethod represents a SOCKS authentication method. +type AuthMethod int + +// A Reply represents a SOCKS command reply code. +type Reply int + +func (code Reply) String() string { + switch code { + case StatusSucceeded: + return "succeeded" + case 0x01: + return "general SOCKS server failure" + case 0x02: + return "connection not allowed by ruleset" + case 0x03: + return "network unreachable" + case 0x04: + return "host unreachable" + case 0x05: + return "connection refused" + case 0x06: + return "TTL expired" + case 0x07: + return "command not supported" + case 0x08: + return "address type not supported" + default: + return "unknown code: " + strconv.Itoa(int(code)) + } +} + +// Wire protocol constants. +const ( + Version5 = 0x05 + + AddrTypeIPv4 = 0x01 + AddrTypeFQDN = 0x03 + AddrTypeIPv6 = 0x04 + + CmdConnect Command = 0x01 // establishes an active-open forward proxy connection + cmdBind Command = 0x02 // establishes a passive-open forward proxy connection + + AuthMethodNotRequired AuthMethod = 0x00 // no authentication required + AuthMethodUsernamePassword AuthMethod = 0x02 // use username/password + AuthMethodNoAcceptableMethods AuthMethod = 0xff // no acceptable authentication methods + + StatusSucceeded Reply = 0x00 +) + +// An Addr represents a SOCKS-specific address. +// Either Name or IP is used exclusively. +type Addr struct { + Name string // fully-qualified domain name + IP net.IP + Port int +} + +func (a *Addr) Network() string { return "socks" } + +func (a *Addr) String() string { + if a == nil { + return "" + } + port := strconv.Itoa(a.Port) + if a.IP == nil { + return net.JoinHostPort(a.Name, port) + } + return net.JoinHostPort(a.IP.String(), port) +} + +// A Conn represents a forward proxy connection. +type Conn struct { + net.Conn + + boundAddr net.Addr +} + +// BoundAddr returns the address assigned by the proxy server for +// connecting to the command target address from the proxy server. +func (c *Conn) BoundAddr() net.Addr { + if c == nil { + return nil + } + return c.boundAddr +} + +// A Dialer holds SOCKS-specific options. +type Dialer struct { + cmd Command // either CmdConnect or cmdBind + proxyNetwork string // network between a proxy server and a client + proxyAddress string // proxy server address + + // ProxyDial specifies the optional dial function for + // establishing the transport connection. + ProxyDial func(context.Context, string, string) (net.Conn, error) + + // AuthMethods specifies the list of request authentication + // methods. + // If empty, SOCKS client requests only AuthMethodNotRequired. + AuthMethods []AuthMethod + + // Authenticate specifies the optional authentication + // function. It must be non-nil when AuthMethods is not empty. + // It must return an error when the authentication is failed. + Authenticate func(context.Context, io.ReadWriter, AuthMethod) error +} + +// DialContext connects to the provided address on the provided +// network. +// +// The returned error value may be a net.OpError. When the Op field of +// net.OpError contains "socks", the Source field contains a proxy +// server address and the Addr field contains a command target +// address. +// +// See func Dial of the net package of standard library for a +// description of the network and address parameters. +func (d *Dialer) DialContext(ctx context.Context, network, address string) (net.Conn, error) { + if err := d.validateTarget(network, address); err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + if ctx == nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: errors.New("nil context")} + } + var err error + var c net.Conn + if d.ProxyDial != nil { + c, err = d.ProxyDial(ctx, d.proxyNetwork, d.proxyAddress) + } else { + var dd net.Dialer + c, err = dd.DialContext(ctx, d.proxyNetwork, d.proxyAddress) + } + if err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + a, err := d.connect(ctx, c, address) + if err != nil { + c.Close() + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + return &Conn{Conn: c, boundAddr: a}, nil +} + +// DialWithConn initiates a connection from SOCKS server to the target +// network and address using the connection c that is already +// connected to the SOCKS server. +// +// It returns the connection's local address assigned by the SOCKS +// server. +func (d *Dialer) DialWithConn(ctx context.Context, c net.Conn, network, address string) (net.Addr, error) { + if err := d.validateTarget(network, address); err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + if ctx == nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: errors.New("nil context")} + } + a, err := d.connect(ctx, c, address) + if err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + return a, nil +} + +// Dial connects to the provided address on the provided network. +// +// Unlike DialContext, it returns a raw transport connection instead +// of a forward proxy connection. +// +// Deprecated: Use DialContext or DialWithConn instead. +func (d *Dialer) Dial(network, address string) (net.Conn, error) { + if err := d.validateTarget(network, address); err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + var err error + var c net.Conn + if d.ProxyDial != nil { + c, err = d.ProxyDial(context.Background(), d.proxyNetwork, d.proxyAddress) + } else { + c, err = net.Dial(d.proxyNetwork, d.proxyAddress) + } + if err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + if _, err := d.DialWithConn(context.Background(), c, network, address); err != nil { + c.Close() + return nil, err + } + return c, nil +} + +func (d *Dialer) validateTarget(network, address string) error { + switch network { + case "tcp", "tcp6", "tcp4": + default: + return errors.New("network not implemented") + } + switch d.cmd { + case CmdConnect, cmdBind: + default: + return errors.New("command not implemented") + } + return nil +} + +func (d *Dialer) pathAddrs(address string) (proxy, dst net.Addr, err error) { + for i, s := range []string{d.proxyAddress, address} { + host, port, err := splitHostPort(s) + if err != nil { + return nil, nil, err + } + a := &Addr{Port: port} + a.IP = net.ParseIP(host) + if a.IP == nil { + a.Name = host + } + if i == 0 { + proxy = a + } else { + dst = a + } + } + return +} + +// NewDialer returns a new Dialer that dials through the provided +// proxy server's network and address. +func NewDialer(network, address string) *Dialer { + return &Dialer{proxyNetwork: network, proxyAddress: address, cmd: CmdConnect} +} + +const ( + authUsernamePasswordVersion = 0x01 + authStatusSucceeded = 0x00 +) + +// UsernamePassword are the credentials for the username/password +// authentication method. +type UsernamePassword struct { + Username string + Password string +} + +// Authenticate authenticates a pair of username and password with the +// proxy server. +func (up *UsernamePassword) Authenticate(ctx context.Context, rw io.ReadWriter, auth AuthMethod) error { + switch auth { + case AuthMethodNotRequired: + return nil + case AuthMethodUsernamePassword: + if len(up.Username) == 0 || len(up.Username) > 255 || len(up.Password) > 255 { + return errors.New("invalid username/password") + } + b := []byte{authUsernamePasswordVersion} + b = append(b, byte(len(up.Username))) + b = append(b, up.Username...) + b = append(b, byte(len(up.Password))) + b = append(b, up.Password...) + // TODO(mikio): handle IO deadlines and cancellation if + // necessary + if _, err := rw.Write(b); err != nil { + return err + } + if _, err := io.ReadFull(rw, b[:2]); err != nil { + return err + } + if b[0] != authUsernamePasswordVersion { + return errors.New("invalid username/password version") + } + if b[1] != authStatusSucceeded { + return errors.New("username/password authentication failed") + } + return nil + } + return errors.New("unsupported authentication method " + strconv.Itoa(int(auth))) +} diff --git a/backend/vendor/golang.org/x/net/proxy/dial.go b/backend/vendor/golang.org/x/net/proxy/dial.go new file mode 100644 index 0000000..811c2e4 --- /dev/null +++ b/backend/vendor/golang.org/x/net/proxy/dial.go @@ -0,0 +1,54 @@ +// Copyright 2019 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package proxy + +import ( + "context" + "net" +) + +// A ContextDialer dials using a context. +type ContextDialer interface { + DialContext(ctx context.Context, network, address string) (net.Conn, error) +} + +// Dial works like DialContext on net.Dialer but using a dialer returned by FromEnvironment. +// +// The passed ctx is only used for returning the Conn, not the lifetime of the Conn. +// +// Custom dialers (registered via RegisterDialerType) that do not implement ContextDialer +// can leak a goroutine for as long as it takes the underlying Dialer implementation to timeout. +// +// A Conn returned from a successful Dial after the context has been cancelled will be immediately closed. +func Dial(ctx context.Context, network, address string) (net.Conn, error) { + d := FromEnvironment() + if xd, ok := d.(ContextDialer); ok { + return xd.DialContext(ctx, network, address) + } + return dialContext(ctx, d, network, address) +} + +// WARNING: this can leak a goroutine for as long as the underlying Dialer implementation takes to timeout +// A Conn returned from a successful Dial after the context has been cancelled will be immediately closed. +func dialContext(ctx context.Context, d Dialer, network, address string) (net.Conn, error) { + var ( + conn net.Conn + done = make(chan struct{}, 1) + err error + ) + go func() { + conn, err = d.Dial(network, address) + close(done) + if conn != nil && ctx.Err() != nil { + conn.Close() + } + }() + select { + case <-ctx.Done(): + err = ctx.Err() + case <-done: + } + return conn, err +} diff --git a/backend/vendor/golang.org/x/net/proxy/direct.go b/backend/vendor/golang.org/x/net/proxy/direct.go new file mode 100644 index 0000000..3d66bde --- /dev/null +++ b/backend/vendor/golang.org/x/net/proxy/direct.go @@ -0,0 +1,31 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package proxy + +import ( + "context" + "net" +) + +type direct struct{} + +// Direct implements Dialer by making network connections directly using net.Dial or net.DialContext. +var Direct = direct{} + +var ( + _ Dialer = Direct + _ ContextDialer = Direct +) + +// Dial directly invokes net.Dial with the supplied parameters. +func (direct) Dial(network, addr string) (net.Conn, error) { + return net.Dial(network, addr) +} + +// DialContext instantiates a net.Dialer and invokes its DialContext receiver with the supplied parameters. +func (direct) DialContext(ctx context.Context, network, addr string) (net.Conn, error) { + var d net.Dialer + return d.DialContext(ctx, network, addr) +} diff --git a/backend/vendor/golang.org/x/net/proxy/per_host.go b/backend/vendor/golang.org/x/net/proxy/per_host.go new file mode 100644 index 0000000..32bdf43 --- /dev/null +++ b/backend/vendor/golang.org/x/net/proxy/per_host.go @@ -0,0 +1,153 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package proxy + +import ( + "context" + "net" + "net/netip" + "strings" +) + +// A PerHost directs connections to a default Dialer unless the host name +// requested matches one of a number of exceptions. +type PerHost struct { + def, bypass Dialer + + bypassNetworks []*net.IPNet + bypassIPs []net.IP + bypassZones []string + bypassHosts []string +} + +// NewPerHost returns a PerHost Dialer that directs connections to either +// defaultDialer or bypass, depending on whether the connection matches one of +// the configured rules. +func NewPerHost(defaultDialer, bypass Dialer) *PerHost { + return &PerHost{ + def: defaultDialer, + bypass: bypass, + } +} + +// Dial connects to the address addr on the given network through either +// defaultDialer or bypass. +func (p *PerHost) Dial(network, addr string) (c net.Conn, err error) { + host, _, err := net.SplitHostPort(addr) + if err != nil { + return nil, err + } + + return p.dialerForRequest(host).Dial(network, addr) +} + +// DialContext connects to the address addr on the given network through either +// defaultDialer or bypass. +func (p *PerHost) DialContext(ctx context.Context, network, addr string) (c net.Conn, err error) { + host, _, err := net.SplitHostPort(addr) + if err != nil { + return nil, err + } + d := p.dialerForRequest(host) + if x, ok := d.(ContextDialer); ok { + return x.DialContext(ctx, network, addr) + } + return dialContext(ctx, d, network, addr) +} + +func (p *PerHost) dialerForRequest(host string) Dialer { + if nip, err := netip.ParseAddr(host); err == nil { + ip := net.IP(nip.AsSlice()) + for _, net := range p.bypassNetworks { + if net.Contains(ip) { + return p.bypass + } + } + for _, bypassIP := range p.bypassIPs { + if bypassIP.Equal(ip) { + return p.bypass + } + } + return p.def + } + + for _, zone := range p.bypassZones { + if strings.HasSuffix(host, zone) { + return p.bypass + } + if host == zone[1:] { + // For a zone ".example.com", we match "example.com" + // too. + return p.bypass + } + } + for _, bypassHost := range p.bypassHosts { + if bypassHost == host { + return p.bypass + } + } + return p.def +} + +// AddFromString parses a string that contains comma-separated values +// specifying hosts that should use the bypass proxy. Each value is either an +// IP address, a CIDR range, a zone (*.example.com) or a host name +// (localhost). A best effort is made to parse the string and errors are +// ignored. +func (p *PerHost) AddFromString(s string) { + hosts := strings.Split(s, ",") + for _, host := range hosts { + host = strings.TrimSpace(host) + if len(host) == 0 { + continue + } + if strings.Contains(host, "/") { + // We assume that it's a CIDR address like 127.0.0.0/8 + if _, net, err := net.ParseCIDR(host); err == nil { + p.AddNetwork(net) + } + continue + } + if nip, err := netip.ParseAddr(host); err == nil { + p.AddIP(net.IP(nip.AsSlice())) + continue + } + if strings.HasPrefix(host, "*.") { + p.AddZone(host[1:]) + continue + } + p.AddHost(host) + } +} + +// AddIP specifies an IP address that will use the bypass proxy. Note that +// this will only take effect if a literal IP address is dialed. A connection +// to a named host will never match an IP. +func (p *PerHost) AddIP(ip net.IP) { + p.bypassIPs = append(p.bypassIPs, ip) +} + +// AddNetwork specifies an IP range that will use the bypass proxy. Note that +// this will only take effect if a literal IP address is dialed. A connection +// to a named host will never match. +func (p *PerHost) AddNetwork(net *net.IPNet) { + p.bypassNetworks = append(p.bypassNetworks, net) +} + +// AddZone specifies a DNS suffix that will use the bypass proxy. A zone of +// "example.com" matches "example.com" and all of its subdomains. +func (p *PerHost) AddZone(zone string) { + zone = strings.TrimSuffix(zone, ".") + if !strings.HasPrefix(zone, ".") { + zone = "." + zone + } + p.bypassZones = append(p.bypassZones, zone) +} + +// AddHost specifies a host name that will use the bypass proxy. +func (p *PerHost) AddHost(host string) { + host = strings.TrimSuffix(host, ".") + p.bypassHosts = append(p.bypassHosts, host) +} diff --git a/backend/vendor/golang.org/x/net/proxy/proxy.go b/backend/vendor/golang.org/x/net/proxy/proxy.go new file mode 100644 index 0000000..9ff4b9a --- /dev/null +++ b/backend/vendor/golang.org/x/net/proxy/proxy.go @@ -0,0 +1,149 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package proxy provides support for a variety of protocols to proxy network +// data. +package proxy // import "golang.org/x/net/proxy" + +import ( + "errors" + "net" + "net/url" + "os" + "sync" +) + +// A Dialer is a means to establish a connection. +// Custom dialers should also implement ContextDialer. +type Dialer interface { + // Dial connects to the given address via the proxy. + Dial(network, addr string) (c net.Conn, err error) +} + +// Auth contains authentication parameters that specific Dialers may require. +type Auth struct { + User, Password string +} + +// FromEnvironment returns the dialer specified by the proxy-related +// variables in the environment and makes underlying connections +// directly. +func FromEnvironment() Dialer { + return FromEnvironmentUsing(Direct) +} + +// FromEnvironmentUsing returns the dialer specify by the proxy-related +// variables in the environment and makes underlying connections +// using the provided forwarding Dialer (for instance, a *net.Dialer +// with desired configuration). +func FromEnvironmentUsing(forward Dialer) Dialer { + allProxy := allProxyEnv.Get() + if len(allProxy) == 0 { + return forward + } + + proxyURL, err := url.Parse(allProxy) + if err != nil { + return forward + } + proxy, err := FromURL(proxyURL, forward) + if err != nil { + return forward + } + + noProxy := noProxyEnv.Get() + if len(noProxy) == 0 { + return proxy + } + + perHost := NewPerHost(proxy, forward) + perHost.AddFromString(noProxy) + return perHost +} + +// proxySchemes is a map from URL schemes to a function that creates a Dialer +// from a URL with such a scheme. +var proxySchemes map[string]func(*url.URL, Dialer) (Dialer, error) + +// RegisterDialerType takes a URL scheme and a function to generate Dialers from +// a URL with that scheme and a forwarding Dialer. Registered schemes are used +// by FromURL. +func RegisterDialerType(scheme string, f func(*url.URL, Dialer) (Dialer, error)) { + if proxySchemes == nil { + proxySchemes = make(map[string]func(*url.URL, Dialer) (Dialer, error)) + } + proxySchemes[scheme] = f +} + +// FromURL returns a Dialer given a URL specification and an underlying +// Dialer for it to make network requests. +func FromURL(u *url.URL, forward Dialer) (Dialer, error) { + var auth *Auth + if u.User != nil { + auth = new(Auth) + auth.User = u.User.Username() + if p, ok := u.User.Password(); ok { + auth.Password = p + } + } + + switch u.Scheme { + case "socks5", "socks5h": + addr := u.Hostname() + port := u.Port() + if port == "" { + port = "1080" + } + return SOCKS5("tcp", net.JoinHostPort(addr, port), auth, forward) + } + + // If the scheme doesn't match any of the built-in schemes, see if it + // was registered by another package. + if proxySchemes != nil { + if f, ok := proxySchemes[u.Scheme]; ok { + return f(u, forward) + } + } + + return nil, errors.New("proxy: unknown scheme: " + u.Scheme) +} + +var ( + allProxyEnv = &envOnce{ + names: []string{"ALL_PROXY", "all_proxy"}, + } + noProxyEnv = &envOnce{ + names: []string{"NO_PROXY", "no_proxy"}, + } +) + +// envOnce looks up an environment variable (optionally by multiple +// names) once. It mitigates expensive lookups on some platforms +// (e.g. Windows). +// (Borrowed from net/http/transport.go) +type envOnce struct { + names []string + once sync.Once + val string +} + +func (e *envOnce) Get() string { + e.once.Do(e.init) + return e.val +} + +func (e *envOnce) init() { + for _, n := range e.names { + e.val = os.Getenv(n) + if e.val != "" { + return + } + } +} + +// reset is used by tests +func (e *envOnce) reset() { + e.once = sync.Once{} + e.val = "" +} diff --git a/backend/vendor/golang.org/x/net/proxy/socks5.go b/backend/vendor/golang.org/x/net/proxy/socks5.go new file mode 100644 index 0000000..c91651f --- /dev/null +++ b/backend/vendor/golang.org/x/net/proxy/socks5.go @@ -0,0 +1,42 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package proxy + +import ( + "context" + "net" + + "golang.org/x/net/internal/socks" +) + +// SOCKS5 returns a Dialer that makes SOCKSv5 connections to the given +// address with an optional username and password. +// See RFC 1928 and RFC 1929. +func SOCKS5(network, address string, auth *Auth, forward Dialer) (Dialer, error) { + d := socks.NewDialer(network, address) + if forward != nil { + if f, ok := forward.(ContextDialer); ok { + d.ProxyDial = func(ctx context.Context, network string, address string) (net.Conn, error) { + return f.DialContext(ctx, network, address) + } + } else { + d.ProxyDial = func(ctx context.Context, network string, address string) (net.Conn, error) { + return dialContext(ctx, forward, network, address) + } + } + } + if auth != nil { + up := socks.UsernamePassword{ + Username: auth.User, + Password: auth.Password, + } + d.AuthMethods = []socks.AuthMethod{ + socks.AuthMethodNotRequired, + socks.AuthMethodUsernamePassword, + } + d.Authenticate = up.Authenticate + } + return d, nil +} diff --git a/backend/vendor/golang.org/x/net/publicsuffix/data/children b/backend/vendor/golang.org/x/net/publicsuffix/data/children new file mode 100644 index 0000000000000000000000000000000000000000..986a246a6c05ca5b49c1d9f3f7fc84cb6628b64e GIT binary patch literal 3484 zcmWN=2Ut_*8USF<$T|P75Wqqy0)=zFkc2uBvDYpfl^6{HR78Zx4p*z-K*enx3?(6m z2nr|@RaEp?j^O#%oG1S~U%-fJB#dR6rLKF@1sXJ_a1sn4gAJ`MXc?o(pP&67l` z;5?Cb^8&H`=4B#_aU-%bJ&7F*PwdQ;5*lVSkrzCkC}F-QN`e;?C7DaO5<@Cc%A^sc z!As*yGnWzN%yOc_u$ef>WDy4q*~FpXoy4KcGVYLJfBfO#1KeRl1#yC@Bu-@h%AGKr zBTh5tiPOPXh%=d2i8BTRaW>P){c5i?;lX;h`G2G+MG55K1!4J4|nJwHo z!$a;o)5@I>ZsRTow{w>bgWQ$ikK9$3;I0~J?wX9{uCtiCF0O%8jL|)qj4&CCridPWz8V&8I{C?tZ1TzO(0scl8E-KRIc5)ihIPaCLYN$ zh`y{f#AD-r;t5+xJYx?Nuh+BYCV%;M$2=$Rc)8F$!*@I+I-3NXW`bbX6vE!$hhLBV7 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z@K&SO^L8)uiJLR%KIH&*eS%r%%3bu%ktvyk9;6!hpNY^p|C*4F(xURKkT`*QR6nA9 zzav5yq%+++5}|=NL6oP5Nztjui^`l#%BtskA(nnHaWr%_CxWOwx&w|aZhGr5Gv18Rjh$E9xUOaIN2>F``$^3nIemaWsH-V4|-Qu-Ea=3(!?gSi1G(0hk;YrMG zcncl=-9$qXde{c5A2VK}E4O+EG47lXhyVQy*dAi&;(s4(@i&>&tzDwyK!LM!M%RUO z#HfEU5_NVoqa(K)DaxUvT>HNw_iaSk0;*oz!9Z@yHe7PfRxB7pKV5bfD$5?+LVn1z zL=|UaMr}`608xF3P~RW49~?|QGkA9nDi4hVE@kZK>D)y*_=4eJ^+z#y<(%-K4y+n_ zR08lbv<> (nodesBitsTextOffset + nodesBitsTextLength)) + icannNode = u&(1<>= nodesBitsICANN + u = children.get(u & (1<>= childrenBitsLo + hi = u & (1<>= childrenBitsHi + switch u & (1<>= childrenBitsNodeType + wildcard = u&(1<>= nodesBitsTextLength + offset := x & (1<= len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst] = c + nDst++ + nSrc = i + 1 + continue + } + + decode := &m.charmap.decode[c] + n := int(decode.len) + if nDst+n > len(dst) { + err = transform.ErrShortDst + break + } + // It's 15% faster to avoid calling copy for these tiny slices. + for j := 0; j < n; j++ { + dst[nDst] = decode.data[j] + nDst++ + } + nSrc = i + 1 + } + return nDst, nSrc, err +} + +// DecodeByte returns the Charmap's rune decoding of the byte b. +func (m *Charmap) DecodeByte(b byte) rune { + switch x := &m.decode[b]; x.len { + case 1: + return rune(x.data[0]) + case 2: + return rune(x.data[0]&0x1f)<<6 | rune(x.data[1]&0x3f) + default: + return rune(x.data[0]&0x0f)<<12 | rune(x.data[1]&0x3f)<<6 | rune(x.data[2]&0x3f) + } +} + +// charmapEncoder implements transform.Transformer by encoding from UTF-8. +type charmapEncoder struct { + transform.NopResetter + charmap *Charmap +} + +func (m charmapEncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 +loop: + for nSrc < len(src) { + if nDst >= len(dst) { + err = transform.ErrShortDst + break + } + r = rune(src[nSrc]) + + // Decode a 1-byte rune. + if r < utf8.RuneSelf { + if m.charmap.asciiSuperset { + nSrc++ + dst[nDst] = uint8(r) + nDst++ + continue + } + size = 1 + + } else { + // Decode a multi-byte rune. + r, size = utf8.DecodeRune(src[nSrc:]) + if size == 1 { + // All valid runes of size 1 (those below utf8.RuneSelf) were + // handled above. We have invalid UTF-8 or we haven't seen the + // full character yet. + if !atEOF && !utf8.FullRune(src[nSrc:]) { + err = transform.ErrShortSrc + } else { + err = internal.RepertoireError(m.charmap.replacement) + } + break + } + } + + // Binary search in [low, high) for that rune in the m.charmap.encode table. + for low, high := int(m.charmap.low), 0x100; ; { + if low >= high { + err = internal.RepertoireError(m.charmap.replacement) + break loop + } + mid := (low + high) / 2 + got := m.charmap.encode[mid] + gotRune := rune(got & (1<<24 - 1)) + if gotRune < r { + low = mid + 1 + } else if gotRune > r { + high = mid + } else { + dst[nDst] = byte(got >> 24) + nDst++ + break + } + } + nSrc += size + } + return nDst, nSrc, err +} + +// EncodeRune returns the Charmap's byte encoding of the rune r. ok is whether +// r is in the Charmap's repertoire. If not, b is set to the Charmap's +// replacement byte. This is often the ASCII substitute character '\x1a'. +func (m *Charmap) EncodeRune(r rune) (b byte, ok bool) { + if r < utf8.RuneSelf && m.asciiSuperset { + return byte(r), true + } + for low, high := int(m.low), 0x100; ; { + if low >= high { + return m.replacement, false + } + mid := (low + high) / 2 + got := m.encode[mid] + gotRune := rune(got & (1<<24 - 1)) + if gotRune < r { + low = mid + 1 + } else if gotRune > r { + high = mid + } else { + return byte(got >> 24), true + } + } +} diff --git a/backend/vendor/golang.org/x/text/encoding/charmap/tables.go b/backend/vendor/golang.org/x/text/encoding/charmap/tables.go new file mode 100644 index 0000000..cf7281e --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/charmap/tables.go @@ -0,0 +1,7410 @@ +// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT. + +package charmap + +import ( + "golang.org/x/text/encoding" + "golang.org/x/text/encoding/internal/identifier" +) + +// CodePage037 is the IBM Code Page 037 encoding. +var CodePage037 *Charmap = &codePage037 + +var codePage037 = Charmap{ + name: "IBM Code Page 037", + mib: identifier.IBM037, + asciiSuperset: false, + low: 0x00, + replacement: 0x3f, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x9c, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x86, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x97, 0x00}}, {2, [3]byte{0xc2, 0x8d, 0x00}}, + {2, [3]byte{0xc2, 0x8e, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x9d, 0x00}}, {2, [3]byte{0xc2, 0x85, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {2, [3]byte{0xc2, 0x87, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x92, 0x00}}, {2, [3]byte{0xc2, 0x8f, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x80, 0x00}}, {2, [3]byte{0xc2, 0x81, 0x00}}, + {2, [3]byte{0xc2, 0x82, 0x00}}, {2, [3]byte{0xc2, 0x83, 0x00}}, + {2, [3]byte{0xc2, 0x84, 0x00}}, {1, [3]byte{0x0a, 0x00, 0x00}}, + {1, [3]byte{0x17, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x88, 0x00}}, {2, [3]byte{0xc2, 0x89, 0x00}}, + {2, [3]byte{0xc2, 0x8a, 0x00}}, {2, [3]byte{0xc2, 0x8b, 0x00}}, + {2, [3]byte{0xc2, 0x8c, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x90, 0x00}}, {2, [3]byte{0xc2, 0x91, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {2, [3]byte{0xc2, 0x93, 0x00}}, + {2, [3]byte{0xc2, 0x94, 0x00}}, {2, [3]byte{0xc2, 0x95, 0x00}}, + {2, [3]byte{0xc2, 0x96, 0x00}}, {1, [3]byte{0x04, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x98, 0x00}}, {2, [3]byte{0xc2, 0x99, 0x00}}, + {2, [3]byte{0xc2, 0x9a, 0x00}}, {2, [3]byte{0xc2, 0x9b, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x9e, 0x00}}, {1, [3]byte{0x1a, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {2, [3]byte{0xc2, 0xa0, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xc3, 0xa4, 0x00}}, + {2, [3]byte{0xc3, 0xa0, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa3, 0x00}}, {2, [3]byte{0xc3, 0xa5, 0x00}}, + {2, [3]byte{0xc3, 0xa7, 0x00}}, {2, [3]byte{0xc3, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xa2, 0x00}}, {1, [3]byte{0x2e, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x28, 0x00, 0x00}}, + {1, [3]byte{0x2b, 0x00, 0x00}}, {1, [3]byte{0x7c, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0xac, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {1, [3]byte{0x21, 0x00, 0x00}}, {1, [3]byte{0x24, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x3b, 0x00, 0x00}}, {2, [3]byte{0xc2, 0xac, 0x00}}, + {1, [3]byte{0x2d, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc3, 0x84, 0x00}}, + {2, [3]byte{0xc3, 0x80, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x83, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x87, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {1, [3]byte{0x2c, 0x00, 0x00}}, + {1, [3]byte{0x25, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0xb8, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc3, 0x88, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc3, 0x8f, 0x00}}, + {2, [3]byte{0xc3, 0x8c, 0x00}}, {1, [3]byte{0x60, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x3d, 0x00, 0x00}}, {1, [3]byte{0x22, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0x98, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xab, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xb0, 0x00}}, {2, [3]byte{0xc3, 0xbd, 0x00}}, + {2, [3]byte{0xc3, 0xbe, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {1, [3]byte{0x6a, 0x00, 0x00}}, + {1, [3]byte{0x6b, 0x00, 0x00}}, {1, [3]byte{0x6c, 0x00, 0x00}}, + {1, [3]byte{0x6d, 0x00, 0x00}}, {1, [3]byte{0x6e, 0x00, 0x00}}, + {1, [3]byte{0x6f, 0x00, 0x00}}, {1, [3]byte{0x70, 0x00, 0x00}}, + {1, [3]byte{0x71, 0x00, 0x00}}, {1, [3]byte{0x72, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xba, 0x00}}, + {2, [3]byte{0xc3, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xb8, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc2, 0xa4, 0x00}}, + {2, [3]byte{0xc2, 0xb5, 0x00}}, {1, [3]byte{0x7e, 0x00, 0x00}}, + {1, [3]byte{0x73, 0x00, 0x00}}, {1, [3]byte{0x74, 0x00, 0x00}}, + {1, [3]byte{0x75, 0x00, 0x00}}, {1, [3]byte{0x76, 0x00, 0x00}}, + {1, [3]byte{0x77, 0x00, 0x00}}, {1, [3]byte{0x78, 0x00, 0x00}}, + {1, [3]byte{0x79, 0x00, 0x00}}, {1, [3]byte{0x7a, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xa1, 0x00}}, {2, [3]byte{0xc2, 0xbf, 0x00}}, + {2, [3]byte{0xc3, 0x90, 0x00}}, {2, [3]byte{0xc3, 0x9d, 0x00}}, + {2, [3]byte{0xc3, 0x9e, 0x00}}, {2, [3]byte{0xc2, 0xae, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa5, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc2, 0xa9, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xbc, 0x00}}, + {2, [3]byte{0xc2, 0xbd, 0x00}}, {2, [3]byte{0xc2, 0xbe, 0x00}}, + {1, [3]byte{0x5b, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xaf, 0x00}}, {2, [3]byte{0xc2, 0xa8, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {1, [3]byte{0x7b, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xad, 0x00}}, {2, [3]byte{0xc3, 0xb4, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb2, 0x00}}, + {2, [3]byte{0xc3, 0xb3, 0x00}}, {2, [3]byte{0xc3, 0xb5, 0x00}}, + {1, [3]byte{0x7d, 0x00, 0x00}}, {1, [3]byte{0x4a, 0x00, 0x00}}, + {1, [3]byte{0x4b, 0x00, 0x00}}, {1, [3]byte{0x4c, 0x00, 0x00}}, + {1, [3]byte{0x4d, 0x00, 0x00}}, {1, [3]byte{0x4e, 0x00, 0x00}}, + {1, [3]byte{0x4f, 0x00, 0x00}}, {1, [3]byte{0x50, 0x00, 0x00}}, + {1, [3]byte{0x51, 0x00, 0x00}}, {1, [3]byte{0x52, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xb9, 0x00}}, {2, [3]byte{0xc3, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xbf, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {1, [3]byte{0x53, 0x00, 0x00}}, {1, [3]byte{0x54, 0x00, 0x00}}, + {1, [3]byte{0x55, 0x00, 0x00}}, {1, [3]byte{0x56, 0x00, 0x00}}, + {1, [3]byte{0x57, 0x00, 0x00}}, {1, [3]byte{0x58, 0x00, 0x00}}, + {1, [3]byte{0x59, 0x00, 0x00}}, {1, [3]byte{0x5a, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc3, 0x94, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x92, 0x00}}, + {2, [3]byte{0xc3, 0x93, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xb3, 0x00}}, {2, [3]byte{0xc3, 0x9b, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc2, 0x9f, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x37000004, 0x2d000005, 0x2e000006, 0x2f000007, + 0x16000008, 0x05000009, 0x2500000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x3c000014, 0x3d000015, 0x32000016, 0x26000017, + 0x18000018, 0x19000019, 0x3f00001a, 0x2700001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x40000020, 0x5a000021, 0x7f000022, 0x7b000023, 0x5b000024, 0x6c000025, 0x50000026, 0x7d000027, + 0x4d000028, 0x5d000029, 0x5c00002a, 0x4e00002b, 0x6b00002c, 0x6000002d, 0x4b00002e, 0x6100002f, + 0xf0000030, 0xf1000031, 0xf2000032, 0xf3000033, 0xf4000034, 0xf5000035, 0xf6000036, 0xf7000037, + 0xf8000038, 0xf9000039, 0x7a00003a, 0x5e00003b, 0x4c00003c, 0x7e00003d, 0x6e00003e, 0x6f00003f, + 0x7c000040, 0xc1000041, 0xc2000042, 0xc3000043, 0xc4000044, 0xc5000045, 0xc6000046, 0xc7000047, + 0xc8000048, 0xc9000049, 0xd100004a, 0xd200004b, 0xd300004c, 0xd400004d, 0xd500004e, 0xd600004f, + 0xd7000050, 0xd8000051, 0xd9000052, 0xe2000053, 0xe3000054, 0xe4000055, 0xe5000056, 0xe6000057, + 0xe7000058, 0xe8000059, 0xe900005a, 0xba00005b, 0xe000005c, 0xbb00005d, 0xb000005e, 0x6d00005f, + 0x79000060, 0x81000061, 0x82000062, 0x83000063, 0x84000064, 0x85000065, 0x86000066, 0x87000067, + 0x88000068, 0x89000069, 0x9100006a, 0x9200006b, 0x9300006c, 0x9400006d, 0x9500006e, 0x9600006f, + 0x97000070, 0x98000071, 0x99000072, 0xa2000073, 0xa3000074, 0xa4000075, 0xa5000076, 0xa6000077, + 0xa7000078, 0xa8000079, 0xa900007a, 0xc000007b, 0x4f00007c, 0xd000007d, 0xa100007e, 0x0700007f, + 0x20000080, 0x21000081, 0x22000082, 0x23000083, 0x24000084, 0x15000085, 0x06000086, 0x17000087, + 0x28000088, 0x29000089, 0x2a00008a, 0x2b00008b, 0x2c00008c, 0x0900008d, 0x0a00008e, 0x1b00008f, + 0x30000090, 0x31000091, 0x1a000092, 0x33000093, 0x34000094, 0x35000095, 0x36000096, 0x08000097, + 0x38000098, 0x39000099, 0x3a00009a, 0x3b00009b, 0x0400009c, 0x1400009d, 0x3e00009e, 0xff00009f, + 0x410000a0, 0xaa0000a1, 0x4a0000a2, 0xb10000a3, 0x9f0000a4, 0xb20000a5, 0x6a0000a6, 0xb50000a7, + 0xbd0000a8, 0xb40000a9, 0x9a0000aa, 0x8a0000ab, 0x5f0000ac, 0xca0000ad, 0xaf0000ae, 0xbc0000af, + 0x900000b0, 0x8f0000b1, 0xea0000b2, 0xfa0000b3, 0xbe0000b4, 0xa00000b5, 0xb60000b6, 0xb30000b7, + 0x9d0000b8, 0xda0000b9, 0x9b0000ba, 0x8b0000bb, 0xb70000bc, 0xb80000bd, 0xb90000be, 0xab0000bf, + 0x640000c0, 0x650000c1, 0x620000c2, 0x660000c3, 0x630000c4, 0x670000c5, 0x9e0000c6, 0x680000c7, + 0x740000c8, 0x710000c9, 0x720000ca, 0x730000cb, 0x780000cc, 0x750000cd, 0x760000ce, 0x770000cf, + 0xac0000d0, 0x690000d1, 0xed0000d2, 0xee0000d3, 0xeb0000d4, 0xef0000d5, 0xec0000d6, 0xbf0000d7, + 0x800000d8, 0xfd0000d9, 0xfe0000da, 0xfb0000db, 0xfc0000dc, 0xad0000dd, 0xae0000de, 0x590000df, + 0x440000e0, 0x450000e1, 0x420000e2, 0x460000e3, 0x430000e4, 0x470000e5, 0x9c0000e6, 0x480000e7, + 0x540000e8, 0x510000e9, 0x520000ea, 0x530000eb, 0x580000ec, 0x550000ed, 0x560000ee, 0x570000ef, + 0x8c0000f0, 0x490000f1, 0xcd0000f2, 0xce0000f3, 0xcb0000f4, 0xcf0000f5, 0xcc0000f6, 0xe10000f7, + 0x700000f8, 0xdd0000f9, 0xde0000fa, 0xdb0000fb, 0xdc0000fc, 0x8d0000fd, 0x8e0000fe, 0xdf0000ff, + }, +} + +// CodePage437 is the IBM Code Page 437 encoding. +var CodePage437 *Charmap = &codePage437 + +var codePage437 = Charmap{ + name: "IBM Code Page 437", + mib: identifier.PC8CodePage437, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0x87, 0x00}}, {2, [3]byte{0xc3, 0xbc, 0x00}}, + {2, [3]byte{0xc3, 0xa9, 0x00}}, {2, [3]byte{0xc3, 0xa2, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa0, 0x00}}, + {2, [3]byte{0xc3, 0xa5, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xac, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x89, 0x00}}, {2, [3]byte{0xc3, 0xa6, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc3, 0xb4, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb2, 0x00}}, + {2, [3]byte{0xc3, 0xbb, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xbf, 0x00}}, {2, [3]byte{0xc3, 0x96, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc2, 0xa2, 0x00}}, + {2, [3]byte{0xc2, 0xa3, 0x00}}, {2, [3]byte{0xc2, 0xa5, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xa7}}, {2, [3]byte{0xc6, 0x92, 0x00}}, + {2, [3]byte{0xc3, 0xa1, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xb3, 0x00}}, {2, [3]byte{0xc3, 0xba, 0x00}}, + {2, [3]byte{0xc3, 0xb1, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc2, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xba, 0x00}}, + {2, [3]byte{0xc2, 0xbf, 0x00}}, {3, [3]byte{0xe2, 0x8c, 0x90}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xa1, 0x00}}, + {2, [3]byte{0xc2, 0xab, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0x91}}, {3, [3]byte{0xe2, 0x96, 0x92}}, + {3, [3]byte{0xe2, 0x96, 0x93}}, {3, [3]byte{0xe2, 0x94, 0x82}}, + {3, [3]byte{0xe2, 0x94, 0xa4}}, {3, [3]byte{0xe2, 0x95, 0xa1}}, + {3, [3]byte{0xe2, 0x95, 0xa2}}, {3, [3]byte{0xe2, 0x95, 0x96}}, + {3, [3]byte{0xe2, 0x95, 0x95}}, {3, [3]byte{0xe2, 0x95, 0xa3}}, + {3, [3]byte{0xe2, 0x95, 0x91}}, {3, [3]byte{0xe2, 0x95, 0x97}}, + {3, [3]byte{0xe2, 0x95, 0x9d}}, {3, [3]byte{0xe2, 0x95, 0x9c}}, + {3, [3]byte{0xe2, 0x95, 0x9b}}, {3, [3]byte{0xe2, 0x94, 0x90}}, + {3, [3]byte{0xe2, 0x94, 0x94}}, {3, [3]byte{0xe2, 0x94, 0xb4}}, + {3, [3]byte{0xe2, 0x94, 0xac}}, {3, [3]byte{0xe2, 0x94, 0x9c}}, + {3, [3]byte{0xe2, 0x94, 0x80}}, {3, [3]byte{0xe2, 0x94, 0xbc}}, + {3, [3]byte{0xe2, 0x95, 0x9e}}, {3, [3]byte{0xe2, 0x95, 0x9f}}, + {3, [3]byte{0xe2, 0x95, 0x9a}}, {3, [3]byte{0xe2, 0x95, 0x94}}, + {3, [3]byte{0xe2, 0x95, 0xa9}}, {3, [3]byte{0xe2, 0x95, 0xa6}}, + {3, [3]byte{0xe2, 0x95, 0xa0}}, {3, [3]byte{0xe2, 0x95, 0x90}}, + {3, [3]byte{0xe2, 0x95, 0xac}}, {3, [3]byte{0xe2, 0x95, 0xa7}}, + {3, [3]byte{0xe2, 0x95, 0xa8}}, {3, [3]byte{0xe2, 0x95, 0xa4}}, + {3, [3]byte{0xe2, 0x95, 0xa5}}, {3, [3]byte{0xe2, 0x95, 0x99}}, + {3, [3]byte{0xe2, 0x95, 0x98}}, {3, [3]byte{0xe2, 0x95, 0x92}}, + {3, [3]byte{0xe2, 0x95, 0x93}}, {3, [3]byte{0xe2, 0x95, 0xab}}, + {3, [3]byte{0xe2, 0x95, 0xaa}}, {3, [3]byte{0xe2, 0x94, 0x98}}, + {3, [3]byte{0xe2, 0x94, 0x8c}}, {3, [3]byte{0xe2, 0x96, 0x88}}, + {3, [3]byte{0xe2, 0x96, 0x84}}, {3, [3]byte{0xe2, 0x96, 0x8c}}, + {3, [3]byte{0xe2, 0x96, 0x90}}, {3, [3]byte{0xe2, 0x96, 0x80}}, + {2, [3]byte{0xce, 0xb1, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xce, 0x93, 0x00}}, {2, [3]byte{0xcf, 0x80, 0x00}}, + {2, [3]byte{0xce, 0xa3, 0x00}}, {2, [3]byte{0xcf, 0x83, 0x00}}, + {2, [3]byte{0xc2, 0xb5, 0x00}}, {2, [3]byte{0xcf, 0x84, 0x00}}, + {2, [3]byte{0xce, 0xa6, 0x00}}, {2, [3]byte{0xce, 0x98, 0x00}}, + {2, [3]byte{0xce, 0xa9, 0x00}}, {2, [3]byte{0xce, 0xb4, 0x00}}, + {3, [3]byte{0xe2, 0x88, 0x9e}}, {2, [3]byte{0xcf, 0x86, 0x00}}, + {2, [3]byte{0xce, 0xb5, 0x00}}, {3, [3]byte{0xe2, 0x88, 0xa9}}, + {3, [3]byte{0xe2, 0x89, 0xa1}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {3, [3]byte{0xe2, 0x89, 0xa5}}, {3, [3]byte{0xe2, 0x89, 0xa4}}, + {3, [3]byte{0xe2, 0x8c, 0xa0}}, {3, [3]byte{0xe2, 0x8c, 0xa1}}, + {2, [3]byte{0xc3, 0xb7, 0x00}}, {3, [3]byte{0xe2, 0x89, 0x88}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {3, [3]byte{0xe2, 0x88, 0x99}}, + {2, [3]byte{0xc2, 0xb7, 0x00}}, {3, [3]byte{0xe2, 0x88, 0x9a}}, + {3, [3]byte{0xe2, 0x81, 0xbf}}, {2, [3]byte{0xc2, 0xb2, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0xa0}}, {2, [3]byte{0xc2, 0xa0, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xff0000a0, 0xad0000a1, 0x9b0000a2, 0x9c0000a3, 0x9d0000a5, 0xa60000aa, 0xae0000ab, 0xaa0000ac, + 0xf80000b0, 0xf10000b1, 0xfd0000b2, 0xe60000b5, 0xfa0000b7, 0xa70000ba, 0xaf0000bb, 0xac0000bc, + 0xab0000bd, 0xa80000bf, 0x8e0000c4, 0x8f0000c5, 0x920000c6, 0x800000c7, 0x900000c9, 0xa50000d1, + 0x990000d6, 0x9a0000dc, 0xe10000df, 0x850000e0, 0xa00000e1, 0x830000e2, 0x840000e4, 0x860000e5, + 0x910000e6, 0x870000e7, 0x8a0000e8, 0x820000e9, 0x880000ea, 0x890000eb, 0x8d0000ec, 0xa10000ed, + 0x8c0000ee, 0x8b0000ef, 0xa40000f1, 0x950000f2, 0xa20000f3, 0x930000f4, 0x940000f6, 0xf60000f7, + 0x970000f9, 0xa30000fa, 0x960000fb, 0x810000fc, 0x980000ff, 0x9f000192, 0xe2000393, 0xe9000398, + 0xe40003a3, 0xe80003a6, 0xea0003a9, 0xe00003b1, 0xeb0003b4, 0xee0003b5, 0xe30003c0, 0xe50003c3, + 0xe70003c4, 0xed0003c6, 0xfc00207f, 0x9e0020a7, 0xf9002219, 0xfb00221a, 0xec00221e, 0xef002229, + 0xf7002248, 0xf0002261, 0xf3002264, 0xf2002265, 0xa9002310, 0xf4002320, 0xf5002321, 0xc4002500, + 0xb3002502, 0xda00250c, 0xbf002510, 0xc0002514, 0xd9002518, 0xc300251c, 0xb4002524, 0xc200252c, + 0xc1002534, 0xc500253c, 0xcd002550, 0xba002551, 0xd5002552, 0xd6002553, 0xc9002554, 0xb8002555, + 0xb7002556, 0xbb002557, 0xd4002558, 0xd3002559, 0xc800255a, 0xbe00255b, 0xbd00255c, 0xbc00255d, + 0xc600255e, 0xc700255f, 0xcc002560, 0xb5002561, 0xb6002562, 0xb9002563, 0xd1002564, 0xd2002565, + 0xcb002566, 0xcf002567, 0xd0002568, 0xca002569, 0xd800256a, 0xd700256b, 0xce00256c, 0xdf002580, + 0xdc002584, 0xdb002588, 0xdd00258c, 0xde002590, 0xb0002591, 0xb1002592, 0xb2002593, 0xfe0025a0, + }, +} + +// CodePage850 is the IBM Code Page 850 encoding. +var CodePage850 *Charmap = &codePage850 + +var codePage850 = Charmap{ + name: "IBM Code Page 850", + mib: identifier.PC850Multilingual, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0x87, 0x00}}, {2, [3]byte{0xc3, 0xbc, 0x00}}, + {2, [3]byte{0xc3, 0xa9, 0x00}}, {2, [3]byte{0xc3, 0xa2, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa0, 0x00}}, + {2, [3]byte{0xc3, 0xa5, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xac, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x89, 0x00}}, {2, [3]byte{0xc3, 0xa6, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc3, 0xb4, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb2, 0x00}}, + {2, [3]byte{0xc3, 0xbb, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xbf, 0x00}}, {2, [3]byte{0xc3, 0x96, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0xb8, 0x00}}, + {2, [3]byte{0xc2, 0xa3, 0x00}}, {2, [3]byte{0xc3, 0x98, 0x00}}, + {2, [3]byte{0xc3, 0x97, 0x00}}, {2, [3]byte{0xc6, 0x92, 0x00}}, + {2, [3]byte{0xc3, 0xa1, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xb3, 0x00}}, {2, [3]byte{0xc3, 0xba, 0x00}}, + {2, [3]byte{0xc3, 0xb1, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc2, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xba, 0x00}}, + {2, [3]byte{0xc2, 0xbf, 0x00}}, {2, [3]byte{0xc2, 0xae, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xa1, 0x00}}, + {2, [3]byte{0xc2, 0xab, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0x91}}, {3, [3]byte{0xe2, 0x96, 0x92}}, + {3, [3]byte{0xe2, 0x96, 0x93}}, {3, [3]byte{0xe2, 0x94, 0x82}}, + {3, [3]byte{0xe2, 0x94, 0xa4}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc3, 0x80, 0x00}}, + {2, [3]byte{0xc2, 0xa9, 0x00}}, {3, [3]byte{0xe2, 0x95, 0xa3}}, + {3, [3]byte{0xe2, 0x95, 0x91}}, {3, [3]byte{0xe2, 0x95, 0x97}}, + {3, [3]byte{0xe2, 0x95, 0x9d}}, {2, [3]byte{0xc2, 0xa2, 0x00}}, + {2, [3]byte{0xc2, 0xa5, 0x00}}, {3, [3]byte{0xe2, 0x94, 0x90}}, + {3, [3]byte{0xe2, 0x94, 0x94}}, {3, [3]byte{0xe2, 0x94, 0xb4}}, + {3, [3]byte{0xe2, 0x94, 0xac}}, {3, [3]byte{0xe2, 0x94, 0x9c}}, + {3, [3]byte{0xe2, 0x94, 0x80}}, {3, [3]byte{0xe2, 0x94, 0xbc}}, + {2, [3]byte{0xc3, 0xa3, 0x00}}, {2, [3]byte{0xc3, 0x83, 0x00}}, + {3, [3]byte{0xe2, 0x95, 0x9a}}, {3, [3]byte{0xe2, 0x95, 0x94}}, + {3, [3]byte{0xe2, 0x95, 0xa9}}, {3, [3]byte{0xe2, 0x95, 0xa6}}, + {3, [3]byte{0xe2, 0x95, 0xa0}}, {3, [3]byte{0xe2, 0x95, 0x90}}, + {3, [3]byte{0xe2, 0x95, 0xac}}, {2, [3]byte{0xc2, 0xa4, 0x00}}, + {2, [3]byte{0xc3, 0xb0, 0x00}}, {2, [3]byte{0xc3, 0x90, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc3, 0x88, 0x00}}, {2, [3]byte{0xc4, 0xb1, 0x00}}, + {2, [3]byte{0xc3, 0x8d, 0x00}}, {2, [3]byte{0xc3, 0x8e, 0x00}}, + {2, [3]byte{0xc3, 0x8f, 0x00}}, {3, [3]byte{0xe2, 0x94, 0x98}}, + {3, [3]byte{0xe2, 0x94, 0x8c}}, {3, [3]byte{0xe2, 0x96, 0x88}}, + {3, [3]byte{0xe2, 0x96, 0x84}}, {2, [3]byte{0xc2, 0xa6, 0x00}}, + {2, [3]byte{0xc3, 0x8c, 0x00}}, {3, [3]byte{0xe2, 0x96, 0x80}}, + {2, [3]byte{0xc3, 0x93, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc3, 0x92, 0x00}}, + {2, [3]byte{0xc3, 0xb5, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {2, [3]byte{0xc2, 0xb5, 0x00}}, {2, [3]byte{0xc3, 0xbe, 0x00}}, + {2, [3]byte{0xc3, 0x9e, 0x00}}, {2, [3]byte{0xc3, 0x9a, 0x00}}, + {2, [3]byte{0xc3, 0x9b, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {2, [3]byte{0xc3, 0xbd, 0x00}}, {2, [3]byte{0xc3, 0x9d, 0x00}}, + {2, [3]byte{0xc2, 0xaf, 0x00}}, {2, [3]byte{0xc2, 0xb4, 0x00}}, + {2, [3]byte{0xc2, 0xad, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0x97}}, {2, [3]byte{0xc2, 0xbe, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xb7, 0x00}}, {2, [3]byte{0xc2, 0xb8, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xa8, 0x00}}, + {2, [3]byte{0xc2, 0xb7, 0x00}}, {2, [3]byte{0xc2, 0xb9, 0x00}}, + {2, [3]byte{0xc2, 0xb3, 0x00}}, {2, [3]byte{0xc2, 0xb2, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0xa0}}, {2, [3]byte{0xc2, 0xa0, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xff0000a0, 0xad0000a1, 0xbd0000a2, 0x9c0000a3, 0xcf0000a4, 0xbe0000a5, 0xdd0000a6, 0xf50000a7, + 0xf90000a8, 0xb80000a9, 0xa60000aa, 0xae0000ab, 0xaa0000ac, 0xf00000ad, 0xa90000ae, 0xee0000af, + 0xf80000b0, 0xf10000b1, 0xfd0000b2, 0xfc0000b3, 0xef0000b4, 0xe60000b5, 0xf40000b6, 0xfa0000b7, + 0xf70000b8, 0xfb0000b9, 0xa70000ba, 0xaf0000bb, 0xac0000bc, 0xab0000bd, 0xf30000be, 0xa80000bf, + 0xb70000c0, 0xb50000c1, 0xb60000c2, 0xc70000c3, 0x8e0000c4, 0x8f0000c5, 0x920000c6, 0x800000c7, + 0xd40000c8, 0x900000c9, 0xd20000ca, 0xd30000cb, 0xde0000cc, 0xd60000cd, 0xd70000ce, 0xd80000cf, + 0xd10000d0, 0xa50000d1, 0xe30000d2, 0xe00000d3, 0xe20000d4, 0xe50000d5, 0x990000d6, 0x9e0000d7, + 0x9d0000d8, 0xeb0000d9, 0xe90000da, 0xea0000db, 0x9a0000dc, 0xed0000dd, 0xe80000de, 0xe10000df, + 0x850000e0, 0xa00000e1, 0x830000e2, 0xc60000e3, 0x840000e4, 0x860000e5, 0x910000e6, 0x870000e7, + 0x8a0000e8, 0x820000e9, 0x880000ea, 0x890000eb, 0x8d0000ec, 0xa10000ed, 0x8c0000ee, 0x8b0000ef, + 0xd00000f0, 0xa40000f1, 0x950000f2, 0xa20000f3, 0x930000f4, 0xe40000f5, 0x940000f6, 0xf60000f7, + 0x9b0000f8, 0x970000f9, 0xa30000fa, 0x960000fb, 0x810000fc, 0xec0000fd, 0xe70000fe, 0x980000ff, + 0xd5000131, 0x9f000192, 0xf2002017, 0xc4002500, 0xb3002502, 0xda00250c, 0xbf002510, 0xc0002514, + 0xd9002518, 0xc300251c, 0xb4002524, 0xc200252c, 0xc1002534, 0xc500253c, 0xcd002550, 0xba002551, + 0xc9002554, 0xbb002557, 0xc800255a, 0xbc00255d, 0xcc002560, 0xb9002563, 0xcb002566, 0xca002569, + 0xce00256c, 0xdf002580, 0xdc002584, 0xdb002588, 0xb0002591, 0xb1002592, 0xb2002593, 0xfe0025a0, + }, +} + +// CodePage852 is the IBM Code Page 852 encoding. +var CodePage852 *Charmap = &codePage852 + +var codePage852 = Charmap{ + name: "IBM Code Page 852", + mib: identifier.PCp852, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0x87, 0x00}}, {2, [3]byte{0xc3, 0xbc, 0x00}}, + {2, [3]byte{0xc3, 0xa9, 0x00}}, {2, [3]byte{0xc3, 0xa2, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc5, 0xaf, 0x00}}, + {2, [3]byte{0xc4, 0x87, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc5, 0x82, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc5, 0x90, 0x00}}, {2, [3]byte{0xc5, 0x91, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc5, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc4, 0x86, 0x00}}, + {2, [3]byte{0xc3, 0x89, 0x00}}, {2, [3]byte{0xc4, 0xb9, 0x00}}, + {2, [3]byte{0xc4, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xb4, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc4, 0xbd, 0x00}}, + {2, [3]byte{0xc4, 0xbe, 0x00}}, {2, [3]byte{0xc5, 0x9a, 0x00}}, + {2, [3]byte{0xc5, 0x9b, 0x00}}, {2, [3]byte{0xc3, 0x96, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc5, 0xa4, 0x00}}, + {2, [3]byte{0xc5, 0xa5, 0x00}}, {2, [3]byte{0xc5, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x97, 0x00}}, {2, [3]byte{0xc4, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0xa1, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xb3, 0x00}}, {2, [3]byte{0xc3, 0xba, 0x00}}, + {2, [3]byte{0xc4, 0x84, 0x00}}, {2, [3]byte{0xc4, 0x85, 0x00}}, + {2, [3]byte{0xc5, 0xbd, 0x00}}, {2, [3]byte{0xc5, 0xbe, 0x00}}, + {2, [3]byte{0xc4, 0x98, 0x00}}, {2, [3]byte{0xc4, 0x99, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc5, 0xba, 0x00}}, + {2, [3]byte{0xc4, 0x8c, 0x00}}, {2, [3]byte{0xc5, 0x9f, 0x00}}, + {2, [3]byte{0xc2, 0xab, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0x91}}, {3, [3]byte{0xe2, 0x96, 0x92}}, + {3, [3]byte{0xe2, 0x96, 0x93}}, {3, [3]byte{0xe2, 0x94, 0x82}}, + {3, [3]byte{0xe2, 0x94, 0xa4}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc4, 0x9a, 0x00}}, + {2, [3]byte{0xc5, 0x9e, 0x00}}, {3, [3]byte{0xe2, 0x95, 0xa3}}, + {3, [3]byte{0xe2, 0x95, 0x91}}, {3, [3]byte{0xe2, 0x95, 0x97}}, + {3, [3]byte{0xe2, 0x95, 0x9d}}, {2, [3]byte{0xc5, 0xbb, 0x00}}, + {2, [3]byte{0xc5, 0xbc, 0x00}}, {3, [3]byte{0xe2, 0x94, 0x90}}, + {3, [3]byte{0xe2, 0x94, 0x94}}, {3, [3]byte{0xe2, 0x94, 0xb4}}, + {3, [3]byte{0xe2, 0x94, 0xac}}, {3, [3]byte{0xe2, 0x94, 0x9c}}, + {3, [3]byte{0xe2, 0x94, 0x80}}, {3, [3]byte{0xe2, 0x94, 0xbc}}, + {2, [3]byte{0xc4, 0x82, 0x00}}, {2, [3]byte{0xc4, 0x83, 0x00}}, + {3, [3]byte{0xe2, 0x95, 0x9a}}, {3, [3]byte{0xe2, 0x95, 0x94}}, + {3, [3]byte{0xe2, 0x95, 0xa9}}, {3, [3]byte{0xe2, 0x95, 0xa6}}, + {3, [3]byte{0xe2, 0x95, 0xa0}}, {3, [3]byte{0xe2, 0x95, 0x90}}, + {3, [3]byte{0xe2, 0x95, 0xac}}, {2, [3]byte{0xc2, 0xa4, 0x00}}, + {2, [3]byte{0xc4, 0x91, 0x00}}, {2, [3]byte{0xc4, 0x90, 0x00}}, + {2, [3]byte{0xc4, 0x8e, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc4, 0x8f, 0x00}}, {2, [3]byte{0xc5, 0x87, 0x00}}, + {2, [3]byte{0xc3, 0x8d, 0x00}}, {2, [3]byte{0xc3, 0x8e, 0x00}}, + {2, [3]byte{0xc4, 0x9b, 0x00}}, {3, [3]byte{0xe2, 0x94, 0x98}}, + {3, [3]byte{0xe2, 0x94, 0x8c}}, {3, [3]byte{0xe2, 0x96, 0x88}}, + {3, [3]byte{0xe2, 0x96, 0x84}}, {2, [3]byte{0xc5, 0xa2, 0x00}}, + {2, [3]byte{0xc5, 0xae, 0x00}}, {3, [3]byte{0xe2, 0x96, 0x80}}, + {2, [3]byte{0xc3, 0x93, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc5, 0x83, 0x00}}, + {2, [3]byte{0xc5, 0x84, 0x00}}, {2, [3]byte{0xc5, 0x88, 0x00}}, + {2, [3]byte{0xc5, 0xa0, 0x00}}, {2, [3]byte{0xc5, 0xa1, 0x00}}, + {2, [3]byte{0xc5, 0x94, 0x00}}, {2, [3]byte{0xc3, 0x9a, 0x00}}, + {2, [3]byte{0xc5, 0x95, 0x00}}, {2, [3]byte{0xc5, 0xb0, 0x00}}, + {2, [3]byte{0xc3, 0xbd, 0x00}}, {2, [3]byte{0xc3, 0x9d, 0x00}}, + {2, [3]byte{0xc5, 0xa3, 0x00}}, {2, [3]byte{0xc2, 0xb4, 0x00}}, + {2, [3]byte{0xc2, 0xad, 0x00}}, {2, [3]byte{0xcb, 0x9d, 0x00}}, + {2, [3]byte{0xcb, 0x9b, 0x00}}, {2, [3]byte{0xcb, 0x87, 0x00}}, + {2, [3]byte{0xcb, 0x98, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xb7, 0x00}}, {2, [3]byte{0xc2, 0xb8, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xa8, 0x00}}, + {2, [3]byte{0xcb, 0x99, 0x00}}, {2, [3]byte{0xc5, 0xb1, 0x00}}, + {2, [3]byte{0xc5, 0x98, 0x00}}, {2, [3]byte{0xc5, 0x99, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0xa0}}, {2, [3]byte{0xc2, 0xa0, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xff0000a0, 0xcf0000a4, 0xf50000a7, 0xf90000a8, 0xae0000ab, 0xaa0000ac, 0xf00000ad, 0xf80000b0, + 0xef0000b4, 0xf70000b8, 0xaf0000bb, 0xb50000c1, 0xb60000c2, 0x8e0000c4, 0x800000c7, 0x900000c9, + 0xd30000cb, 0xd60000cd, 0xd70000ce, 0xe00000d3, 0xe20000d4, 0x990000d6, 0x9e0000d7, 0xe90000da, + 0x9a0000dc, 0xed0000dd, 0xe10000df, 0xa00000e1, 0x830000e2, 0x840000e4, 0x870000e7, 0x820000e9, + 0x890000eb, 0xa10000ed, 0x8c0000ee, 0xa20000f3, 0x930000f4, 0x940000f6, 0xf60000f7, 0xa30000fa, + 0x810000fc, 0xec0000fd, 0xc6000102, 0xc7000103, 0xa4000104, 0xa5000105, 0x8f000106, 0x86000107, + 0xac00010c, 0x9f00010d, 0xd200010e, 0xd400010f, 0xd1000110, 0xd0000111, 0xa8000118, 0xa9000119, + 0xb700011a, 0xd800011b, 0x91000139, 0x9200013a, 0x9500013d, 0x9600013e, 0x9d000141, 0x88000142, + 0xe3000143, 0xe4000144, 0xd5000147, 0xe5000148, 0x8a000150, 0x8b000151, 0xe8000154, 0xea000155, + 0xfc000158, 0xfd000159, 0x9700015a, 0x9800015b, 0xb800015e, 0xad00015f, 0xe6000160, 0xe7000161, + 0xdd000162, 0xee000163, 0x9b000164, 0x9c000165, 0xde00016e, 0x8500016f, 0xeb000170, 0xfb000171, + 0x8d000179, 0xab00017a, 0xbd00017b, 0xbe00017c, 0xa600017d, 0xa700017e, 0xf30002c7, 0xf40002d8, + 0xfa0002d9, 0xf20002db, 0xf10002dd, 0xc4002500, 0xb3002502, 0xda00250c, 0xbf002510, 0xc0002514, + 0xd9002518, 0xc300251c, 0xb4002524, 0xc200252c, 0xc1002534, 0xc500253c, 0xcd002550, 0xba002551, + 0xc9002554, 0xbb002557, 0xc800255a, 0xbc00255d, 0xcc002560, 0xb9002563, 0xcb002566, 0xca002569, + 0xce00256c, 0xdf002580, 0xdc002584, 0xdb002588, 0xb0002591, 0xb1002592, 0xb2002593, 0xfe0025a0, + }, +} + +// CodePage855 is the IBM Code Page 855 encoding. +var CodePage855 *Charmap = &codePage855 + +var codePage855 = Charmap{ + name: "IBM Code Page 855", + mib: identifier.IBM855, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xd1, 0x92, 0x00}}, {2, [3]byte{0xd0, 0x82, 0x00}}, + {2, [3]byte{0xd1, 0x93, 0x00}}, {2, [3]byte{0xd0, 0x83, 0x00}}, + {2, [3]byte{0xd1, 0x91, 0x00}}, {2, [3]byte{0xd0, 0x81, 0x00}}, + {2, [3]byte{0xd1, 0x94, 0x00}}, {2, [3]byte{0xd0, 0x84, 0x00}}, + {2, [3]byte{0xd1, 0x95, 0x00}}, {2, [3]byte{0xd0, 0x85, 0x00}}, + {2, [3]byte{0xd1, 0x96, 0x00}}, {2, [3]byte{0xd0, 0x86, 0x00}}, + {2, [3]byte{0xd1, 0x97, 0x00}}, {2, [3]byte{0xd0, 0x87, 0x00}}, + {2, [3]byte{0xd1, 0x98, 0x00}}, {2, [3]byte{0xd0, 0x88, 0x00}}, + {2, [3]byte{0xd1, 0x99, 0x00}}, {2, [3]byte{0xd0, 0x89, 0x00}}, + {2, [3]byte{0xd1, 0x9a, 0x00}}, {2, [3]byte{0xd0, 0x8a, 0x00}}, + {2, [3]byte{0xd1, 0x9b, 0x00}}, {2, [3]byte{0xd0, 0x8b, 0x00}}, + {2, [3]byte{0xd1, 0x9c, 0x00}}, {2, [3]byte{0xd0, 0x8c, 0x00}}, + {2, [3]byte{0xd1, 0x9e, 0x00}}, {2, [3]byte{0xd0, 0x8e, 0x00}}, + {2, [3]byte{0xd1, 0x9f, 0x00}}, {2, [3]byte{0xd0, 0x8f, 0x00}}, + {2, [3]byte{0xd1, 0x8e, 0x00}}, {2, [3]byte{0xd0, 0xae, 0x00}}, + {2, [3]byte{0xd1, 0x8a, 0x00}}, {2, [3]byte{0xd0, 0xaa, 0x00}}, + {2, [3]byte{0xd0, 0xb0, 0x00}}, {2, [3]byte{0xd0, 0x90, 0x00}}, + {2, [3]byte{0xd0, 0xb1, 0x00}}, {2, [3]byte{0xd0, 0x91, 0x00}}, + {2, [3]byte{0xd1, 0x86, 0x00}}, {2, [3]byte{0xd0, 0xa6, 0x00}}, + {2, [3]byte{0xd0, 0xb4, 0x00}}, {2, [3]byte{0xd0, 0x94, 0x00}}, + {2, [3]byte{0xd0, 0xb5, 0x00}}, {2, [3]byte{0xd0, 0x95, 0x00}}, + {2, [3]byte{0xd1, 0x84, 0x00}}, {2, [3]byte{0xd0, 0xa4, 0x00}}, + {2, [3]byte{0xd0, 0xb3, 0x00}}, {2, [3]byte{0xd0, 0x93, 0x00}}, + {2, [3]byte{0xc2, 0xab, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0x91}}, {3, [3]byte{0xe2, 0x96, 0x92}}, + {3, [3]byte{0xe2, 0x96, 0x93}}, {3, [3]byte{0xe2, 0x94, 0x82}}, + {3, [3]byte{0xe2, 0x94, 0xa4}}, {2, [3]byte{0xd1, 0x85, 0x00}}, + {2, [3]byte{0xd0, 0xa5, 0x00}}, {2, [3]byte{0xd0, 0xb8, 0x00}}, + {2, [3]byte{0xd0, 0x98, 0x00}}, {3, [3]byte{0xe2, 0x95, 0xa3}}, + {3, [3]byte{0xe2, 0x95, 0x91}}, {3, [3]byte{0xe2, 0x95, 0x97}}, + {3, [3]byte{0xe2, 0x95, 0x9d}}, {2, [3]byte{0xd0, 0xb9, 0x00}}, + {2, [3]byte{0xd0, 0x99, 0x00}}, {3, [3]byte{0xe2, 0x94, 0x90}}, + {3, [3]byte{0xe2, 0x94, 0x94}}, {3, [3]byte{0xe2, 0x94, 0xb4}}, + {3, [3]byte{0xe2, 0x94, 0xac}}, {3, [3]byte{0xe2, 0x94, 0x9c}}, + {3, [3]byte{0xe2, 0x94, 0x80}}, {3, [3]byte{0xe2, 0x94, 0xbc}}, + {2, [3]byte{0xd0, 0xba, 0x00}}, {2, [3]byte{0xd0, 0x9a, 0x00}}, + {3, [3]byte{0xe2, 0x95, 0x9a}}, {3, [3]byte{0xe2, 0x95, 0x94}}, + {3, [3]byte{0xe2, 0x95, 0xa9}}, {3, [3]byte{0xe2, 0x95, 0xa6}}, + {3, [3]byte{0xe2, 0x95, 0xa0}}, {3, [3]byte{0xe2, 0x95, 0x90}}, + {3, [3]byte{0xe2, 0x95, 0xac}}, {2, [3]byte{0xc2, 0xa4, 0x00}}, + {2, [3]byte{0xd0, 0xbb, 0x00}}, {2, [3]byte{0xd0, 0x9b, 0x00}}, + {2, [3]byte{0xd0, 0xbc, 0x00}}, {2, [3]byte{0xd0, 0x9c, 0x00}}, + {2, [3]byte{0xd0, 0xbd, 0x00}}, {2, [3]byte{0xd0, 0x9d, 0x00}}, + {2, [3]byte{0xd0, 0xbe, 0x00}}, {2, [3]byte{0xd0, 0x9e, 0x00}}, + {2, [3]byte{0xd0, 0xbf, 0x00}}, {3, [3]byte{0xe2, 0x94, 0x98}}, + {3, [3]byte{0xe2, 0x94, 0x8c}}, {3, [3]byte{0xe2, 0x96, 0x88}}, + {3, [3]byte{0xe2, 0x96, 0x84}}, {2, [3]byte{0xd0, 0x9f, 0x00}}, + {2, [3]byte{0xd1, 0x8f, 0x00}}, {3, [3]byte{0xe2, 0x96, 0x80}}, + {2, [3]byte{0xd0, 0xaf, 0x00}}, {2, [3]byte{0xd1, 0x80, 0x00}}, + {2, [3]byte{0xd0, 0xa0, 0x00}}, {2, [3]byte{0xd1, 0x81, 0x00}}, + {2, [3]byte{0xd0, 0xa1, 0x00}}, {2, [3]byte{0xd1, 0x82, 0x00}}, + {2, [3]byte{0xd0, 0xa2, 0x00}}, {2, [3]byte{0xd1, 0x83, 0x00}}, + {2, [3]byte{0xd0, 0xa3, 0x00}}, {2, [3]byte{0xd0, 0xb6, 0x00}}, + {2, [3]byte{0xd0, 0x96, 0x00}}, {2, [3]byte{0xd0, 0xb2, 0x00}}, + {2, [3]byte{0xd0, 0x92, 0x00}}, {2, [3]byte{0xd1, 0x8c, 0x00}}, + {2, [3]byte{0xd0, 0xac, 0x00}}, {3, [3]byte{0xe2, 0x84, 0x96}}, + {2, [3]byte{0xc2, 0xad, 0x00}}, {2, [3]byte{0xd1, 0x8b, 0x00}}, + {2, [3]byte{0xd0, 0xab, 0x00}}, {2, [3]byte{0xd0, 0xb7, 0x00}}, + {2, [3]byte{0xd0, 0x97, 0x00}}, {2, [3]byte{0xd1, 0x88, 0x00}}, + {2, [3]byte{0xd0, 0xa8, 0x00}}, {2, [3]byte{0xd1, 0x8d, 0x00}}, + {2, [3]byte{0xd0, 0xad, 0x00}}, {2, [3]byte{0xd1, 0x89, 0x00}}, + {2, [3]byte{0xd0, 0xa9, 0x00}}, {2, [3]byte{0xd1, 0x87, 0x00}}, + {2, [3]byte{0xd0, 0xa7, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0xa0}}, {2, [3]byte{0xc2, 0xa0, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xff0000a0, 0xcf0000a4, 0xfd0000a7, 0xae0000ab, 0xf00000ad, 0xaf0000bb, 0x85000401, 0x81000402, + 0x83000403, 0x87000404, 0x89000405, 0x8b000406, 0x8d000407, 0x8f000408, 0x91000409, 0x9300040a, + 0x9500040b, 0x9700040c, 0x9900040e, 0x9b00040f, 0xa1000410, 0xa3000411, 0xec000412, 0xad000413, + 0xa7000414, 0xa9000415, 0xea000416, 0xf4000417, 0xb8000418, 0xbe000419, 0xc700041a, 0xd100041b, + 0xd300041c, 0xd500041d, 0xd700041e, 0xdd00041f, 0xe2000420, 0xe4000421, 0xe6000422, 0xe8000423, + 0xab000424, 0xb6000425, 0xa5000426, 0xfc000427, 0xf6000428, 0xfa000429, 0x9f00042a, 0xf200042b, + 0xee00042c, 0xf800042d, 0x9d00042e, 0xe000042f, 0xa0000430, 0xa2000431, 0xeb000432, 0xac000433, + 0xa6000434, 0xa8000435, 0xe9000436, 0xf3000437, 0xb7000438, 0xbd000439, 0xc600043a, 0xd000043b, + 0xd200043c, 0xd400043d, 0xd600043e, 0xd800043f, 0xe1000440, 0xe3000441, 0xe5000442, 0xe7000443, + 0xaa000444, 0xb5000445, 0xa4000446, 0xfb000447, 0xf5000448, 0xf9000449, 0x9e00044a, 0xf100044b, + 0xed00044c, 0xf700044d, 0x9c00044e, 0xde00044f, 0x84000451, 0x80000452, 0x82000453, 0x86000454, + 0x88000455, 0x8a000456, 0x8c000457, 0x8e000458, 0x90000459, 0x9200045a, 0x9400045b, 0x9600045c, + 0x9800045e, 0x9a00045f, 0xef002116, 0xc4002500, 0xb3002502, 0xda00250c, 0xbf002510, 0xc0002514, + 0xd9002518, 0xc300251c, 0xb4002524, 0xc200252c, 0xc1002534, 0xc500253c, 0xcd002550, 0xba002551, + 0xc9002554, 0xbb002557, 0xc800255a, 0xbc00255d, 0xcc002560, 0xb9002563, 0xcb002566, 0xca002569, + 0xce00256c, 0xdf002580, 0xdc002584, 0xdb002588, 0xb0002591, 0xb1002592, 0xb2002593, 0xfe0025a0, + }, +} + +// CodePage858 is the Windows Code Page 858 encoding. +var CodePage858 *Charmap = &codePage858 + +var codePage858 = Charmap{ + name: "Windows Code Page 858", + mib: identifier.IBM00858, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0x87, 0x00}}, {2, [3]byte{0xc3, 0xbc, 0x00}}, + {2, [3]byte{0xc3, 0xa9, 0x00}}, {2, [3]byte{0xc3, 0xa2, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa0, 0x00}}, + {2, [3]byte{0xc3, 0xa5, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xac, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x89, 0x00}}, {2, [3]byte{0xc3, 0xa6, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc3, 0xb4, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb2, 0x00}}, + {2, [3]byte{0xc3, 0xbb, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xbf, 0x00}}, {2, [3]byte{0xc3, 0x96, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0xb8, 0x00}}, + {2, [3]byte{0xc2, 0xa3, 0x00}}, {2, [3]byte{0xc3, 0x98, 0x00}}, + {2, [3]byte{0xc3, 0x97, 0x00}}, {2, [3]byte{0xc6, 0x92, 0x00}}, + {2, [3]byte{0xc3, 0xa1, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xb3, 0x00}}, {2, [3]byte{0xc3, 0xba, 0x00}}, + {2, [3]byte{0xc3, 0xb1, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc2, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xba, 0x00}}, + {2, [3]byte{0xc2, 0xbf, 0x00}}, {2, [3]byte{0xc2, 0xae, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xa1, 0x00}}, + {2, [3]byte{0xc2, 0xab, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0x91}}, {3, [3]byte{0xe2, 0x96, 0x92}}, + {3, [3]byte{0xe2, 0x96, 0x93}}, {3, [3]byte{0xe2, 0x94, 0x82}}, + {3, [3]byte{0xe2, 0x94, 0xa4}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc3, 0x80, 0x00}}, + {2, [3]byte{0xc2, 0xa9, 0x00}}, {3, [3]byte{0xe2, 0x95, 0xa3}}, + {3, [3]byte{0xe2, 0x95, 0x91}}, {3, [3]byte{0xe2, 0x95, 0x97}}, + {3, [3]byte{0xe2, 0x95, 0x9d}}, {2, [3]byte{0xc2, 0xa2, 0x00}}, + {2, [3]byte{0xc2, 0xa5, 0x00}}, {3, [3]byte{0xe2, 0x94, 0x90}}, + {3, [3]byte{0xe2, 0x94, 0x94}}, {3, [3]byte{0xe2, 0x94, 0xb4}}, + {3, [3]byte{0xe2, 0x94, 0xac}}, {3, [3]byte{0xe2, 0x94, 0x9c}}, + {3, [3]byte{0xe2, 0x94, 0x80}}, {3, [3]byte{0xe2, 0x94, 0xbc}}, + {2, [3]byte{0xc3, 0xa3, 0x00}}, {2, [3]byte{0xc3, 0x83, 0x00}}, + {3, [3]byte{0xe2, 0x95, 0x9a}}, {3, [3]byte{0xe2, 0x95, 0x94}}, + {3, [3]byte{0xe2, 0x95, 0xa9}}, {3, [3]byte{0xe2, 0x95, 0xa6}}, + {3, [3]byte{0xe2, 0x95, 0xa0}}, {3, [3]byte{0xe2, 0x95, 0x90}}, + {3, [3]byte{0xe2, 0x95, 0xac}}, {2, [3]byte{0xc2, 0xa4, 0x00}}, + {2, [3]byte{0xc3, 0xb0, 0x00}}, {2, [3]byte{0xc3, 0x90, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc3, 0x88, 0x00}}, {3, [3]byte{0xe2, 0x82, 0xac}}, + {2, [3]byte{0xc3, 0x8d, 0x00}}, {2, [3]byte{0xc3, 0x8e, 0x00}}, + {2, [3]byte{0xc3, 0x8f, 0x00}}, {3, [3]byte{0xe2, 0x94, 0x98}}, + {3, [3]byte{0xe2, 0x94, 0x8c}}, {3, [3]byte{0xe2, 0x96, 0x88}}, + {3, [3]byte{0xe2, 0x96, 0x84}}, {2, [3]byte{0xc2, 0xa6, 0x00}}, + {2, [3]byte{0xc3, 0x8c, 0x00}}, {3, [3]byte{0xe2, 0x96, 0x80}}, + {2, [3]byte{0xc3, 0x93, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc3, 0x92, 0x00}}, + {2, [3]byte{0xc3, 0xb5, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {2, [3]byte{0xc2, 0xb5, 0x00}}, {2, [3]byte{0xc3, 0xbe, 0x00}}, + {2, [3]byte{0xc3, 0x9e, 0x00}}, {2, [3]byte{0xc3, 0x9a, 0x00}}, + {2, [3]byte{0xc3, 0x9b, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {2, [3]byte{0xc3, 0xbd, 0x00}}, {2, [3]byte{0xc3, 0x9d, 0x00}}, + {2, [3]byte{0xc2, 0xaf, 0x00}}, {2, [3]byte{0xc2, 0xb4, 0x00}}, + {2, [3]byte{0xc2, 0xad, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0x97}}, {2, [3]byte{0xc2, 0xbe, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xb7, 0x00}}, {2, [3]byte{0xc2, 0xb8, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xa8, 0x00}}, + {2, [3]byte{0xc2, 0xb7, 0x00}}, {2, [3]byte{0xc2, 0xb9, 0x00}}, + {2, [3]byte{0xc2, 0xb3, 0x00}}, {2, [3]byte{0xc2, 0xb2, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0xa0}}, {2, [3]byte{0xc2, 0xa0, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xff0000a0, 0xad0000a1, 0xbd0000a2, 0x9c0000a3, 0xcf0000a4, 0xbe0000a5, 0xdd0000a6, 0xf50000a7, + 0xf90000a8, 0xb80000a9, 0xa60000aa, 0xae0000ab, 0xaa0000ac, 0xf00000ad, 0xa90000ae, 0xee0000af, + 0xf80000b0, 0xf10000b1, 0xfd0000b2, 0xfc0000b3, 0xef0000b4, 0xe60000b5, 0xf40000b6, 0xfa0000b7, + 0xf70000b8, 0xfb0000b9, 0xa70000ba, 0xaf0000bb, 0xac0000bc, 0xab0000bd, 0xf30000be, 0xa80000bf, + 0xb70000c0, 0xb50000c1, 0xb60000c2, 0xc70000c3, 0x8e0000c4, 0x8f0000c5, 0x920000c6, 0x800000c7, + 0xd40000c8, 0x900000c9, 0xd20000ca, 0xd30000cb, 0xde0000cc, 0xd60000cd, 0xd70000ce, 0xd80000cf, + 0xd10000d0, 0xa50000d1, 0xe30000d2, 0xe00000d3, 0xe20000d4, 0xe50000d5, 0x990000d6, 0x9e0000d7, + 0x9d0000d8, 0xeb0000d9, 0xe90000da, 0xea0000db, 0x9a0000dc, 0xed0000dd, 0xe80000de, 0xe10000df, + 0x850000e0, 0xa00000e1, 0x830000e2, 0xc60000e3, 0x840000e4, 0x860000e5, 0x910000e6, 0x870000e7, + 0x8a0000e8, 0x820000e9, 0x880000ea, 0x890000eb, 0x8d0000ec, 0xa10000ed, 0x8c0000ee, 0x8b0000ef, + 0xd00000f0, 0xa40000f1, 0x950000f2, 0xa20000f3, 0x930000f4, 0xe40000f5, 0x940000f6, 0xf60000f7, + 0x9b0000f8, 0x970000f9, 0xa30000fa, 0x960000fb, 0x810000fc, 0xec0000fd, 0xe70000fe, 0x980000ff, + 0x9f000192, 0xf2002017, 0xd50020ac, 0xc4002500, 0xb3002502, 0xda00250c, 0xbf002510, 0xc0002514, + 0xd9002518, 0xc300251c, 0xb4002524, 0xc200252c, 0xc1002534, 0xc500253c, 0xcd002550, 0xba002551, + 0xc9002554, 0xbb002557, 0xc800255a, 0xbc00255d, 0xcc002560, 0xb9002563, 0xcb002566, 0xca002569, + 0xce00256c, 0xdf002580, 0xdc002584, 0xdb002588, 0xb0002591, 0xb1002592, 0xb2002593, 0xfe0025a0, + }, +} + +// CodePage860 is the IBM Code Page 860 encoding. +var CodePage860 *Charmap = &codePage860 + +var codePage860 = Charmap{ + name: "IBM Code Page 860", + mib: identifier.IBM860, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0x87, 0x00}}, {2, [3]byte{0xc3, 0xbc, 0x00}}, + {2, [3]byte{0xc3, 0xa9, 0x00}}, {2, [3]byte{0xc3, 0xa2, 0x00}}, + {2, [3]byte{0xc3, 0xa3, 0x00}}, {2, [3]byte{0xc3, 0xa0, 0x00}}, + {2, [3]byte{0xc3, 0x81, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0x8a, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc3, 0xac, 0x00}}, + {2, [3]byte{0xc3, 0x83, 0x00}}, {2, [3]byte{0xc3, 0x82, 0x00}}, + {2, [3]byte{0xc3, 0x89, 0x00}}, {2, [3]byte{0xc3, 0x80, 0x00}}, + {2, [3]byte{0xc3, 0x88, 0x00}}, {2, [3]byte{0xc3, 0xb4, 0x00}}, + {2, [3]byte{0xc3, 0xb5, 0x00}}, {2, [3]byte{0xc3, 0xb2, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc2, 0xa2, 0x00}}, + {2, [3]byte{0xc2, 0xa3, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xa7}}, {2, [3]byte{0xc3, 0x93, 0x00}}, + {2, [3]byte{0xc3, 0xa1, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xb3, 0x00}}, {2, [3]byte{0xc3, 0xba, 0x00}}, + {2, [3]byte{0xc3, 0xb1, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc2, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xba, 0x00}}, + {2, [3]byte{0xc2, 0xbf, 0x00}}, {2, [3]byte{0xc3, 0x92, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xa1, 0x00}}, + {2, [3]byte{0xc2, 0xab, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0x91}}, {3, [3]byte{0xe2, 0x96, 0x92}}, + {3, [3]byte{0xe2, 0x96, 0x93}}, {3, [3]byte{0xe2, 0x94, 0x82}}, + {3, [3]byte{0xe2, 0x94, 0xa4}}, {3, [3]byte{0xe2, 0x95, 0xa1}}, + {3, [3]byte{0xe2, 0x95, 0xa2}}, {3, [3]byte{0xe2, 0x95, 0x96}}, + {3, [3]byte{0xe2, 0x95, 0x95}}, {3, [3]byte{0xe2, 0x95, 0xa3}}, + {3, [3]byte{0xe2, 0x95, 0x91}}, {3, [3]byte{0xe2, 0x95, 0x97}}, + {3, [3]byte{0xe2, 0x95, 0x9d}}, {3, [3]byte{0xe2, 0x95, 0x9c}}, + {3, [3]byte{0xe2, 0x95, 0x9b}}, {3, [3]byte{0xe2, 0x94, 0x90}}, + {3, [3]byte{0xe2, 0x94, 0x94}}, {3, [3]byte{0xe2, 0x94, 0xb4}}, + {3, [3]byte{0xe2, 0x94, 0xac}}, {3, [3]byte{0xe2, 0x94, 0x9c}}, + {3, [3]byte{0xe2, 0x94, 0x80}}, {3, [3]byte{0xe2, 0x94, 0xbc}}, + {3, [3]byte{0xe2, 0x95, 0x9e}}, {3, [3]byte{0xe2, 0x95, 0x9f}}, + {3, [3]byte{0xe2, 0x95, 0x9a}}, {3, [3]byte{0xe2, 0x95, 0x94}}, + {3, [3]byte{0xe2, 0x95, 0xa9}}, {3, [3]byte{0xe2, 0x95, 0xa6}}, + {3, [3]byte{0xe2, 0x95, 0xa0}}, {3, [3]byte{0xe2, 0x95, 0x90}}, + {3, [3]byte{0xe2, 0x95, 0xac}}, {3, [3]byte{0xe2, 0x95, 0xa7}}, + {3, [3]byte{0xe2, 0x95, 0xa8}}, {3, [3]byte{0xe2, 0x95, 0xa4}}, + {3, [3]byte{0xe2, 0x95, 0xa5}}, {3, [3]byte{0xe2, 0x95, 0x99}}, + {3, [3]byte{0xe2, 0x95, 0x98}}, {3, [3]byte{0xe2, 0x95, 0x92}}, + {3, [3]byte{0xe2, 0x95, 0x93}}, {3, [3]byte{0xe2, 0x95, 0xab}}, + {3, [3]byte{0xe2, 0x95, 0xaa}}, {3, [3]byte{0xe2, 0x94, 0x98}}, + {3, [3]byte{0xe2, 0x94, 0x8c}}, {3, [3]byte{0xe2, 0x96, 0x88}}, + {3, [3]byte{0xe2, 0x96, 0x84}}, {3, [3]byte{0xe2, 0x96, 0x8c}}, + {3, [3]byte{0xe2, 0x96, 0x90}}, {3, [3]byte{0xe2, 0x96, 0x80}}, + {2, [3]byte{0xce, 0xb1, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xce, 0x93, 0x00}}, {2, [3]byte{0xcf, 0x80, 0x00}}, + {2, [3]byte{0xce, 0xa3, 0x00}}, {2, [3]byte{0xcf, 0x83, 0x00}}, + {2, [3]byte{0xc2, 0xb5, 0x00}}, {2, [3]byte{0xcf, 0x84, 0x00}}, + {2, [3]byte{0xce, 0xa6, 0x00}}, {2, [3]byte{0xce, 0x98, 0x00}}, + {2, [3]byte{0xce, 0xa9, 0x00}}, {2, [3]byte{0xce, 0xb4, 0x00}}, + {3, [3]byte{0xe2, 0x88, 0x9e}}, {2, [3]byte{0xcf, 0x86, 0x00}}, + {2, [3]byte{0xce, 0xb5, 0x00}}, {3, [3]byte{0xe2, 0x88, 0xa9}}, + {3, [3]byte{0xe2, 0x89, 0xa1}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {3, [3]byte{0xe2, 0x89, 0xa5}}, {3, [3]byte{0xe2, 0x89, 0xa4}}, + {3, [3]byte{0xe2, 0x8c, 0xa0}}, {3, [3]byte{0xe2, 0x8c, 0xa1}}, + {2, [3]byte{0xc3, 0xb7, 0x00}}, {3, [3]byte{0xe2, 0x89, 0x88}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {3, [3]byte{0xe2, 0x88, 0x99}}, + {2, [3]byte{0xc2, 0xb7, 0x00}}, {3, [3]byte{0xe2, 0x88, 0x9a}}, + {3, [3]byte{0xe2, 0x81, 0xbf}}, {2, [3]byte{0xc2, 0xb2, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0xa0}}, {2, [3]byte{0xc2, 0xa0, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xff0000a0, 0xad0000a1, 0x9b0000a2, 0x9c0000a3, 0xa60000aa, 0xae0000ab, 0xaa0000ac, 0xf80000b0, + 0xf10000b1, 0xfd0000b2, 0xe60000b5, 0xfa0000b7, 0xa70000ba, 0xaf0000bb, 0xac0000bc, 0xab0000bd, + 0xa80000bf, 0x910000c0, 0x860000c1, 0x8f0000c2, 0x8e0000c3, 0x800000c7, 0x920000c8, 0x900000c9, + 0x890000ca, 0x980000cc, 0x8b0000cd, 0xa50000d1, 0xa90000d2, 0x9f0000d3, 0x8c0000d4, 0x990000d5, + 0x9d0000d9, 0x960000da, 0x9a0000dc, 0xe10000df, 0x850000e0, 0xa00000e1, 0x830000e2, 0x840000e3, + 0x870000e7, 0x8a0000e8, 0x820000e9, 0x880000ea, 0x8d0000ec, 0xa10000ed, 0xa40000f1, 0x950000f2, + 0xa20000f3, 0x930000f4, 0x940000f5, 0xf60000f7, 0x970000f9, 0xa30000fa, 0x810000fc, 0xe2000393, + 0xe9000398, 0xe40003a3, 0xe80003a6, 0xea0003a9, 0xe00003b1, 0xeb0003b4, 0xee0003b5, 0xe30003c0, + 0xe50003c3, 0xe70003c4, 0xed0003c6, 0xfc00207f, 0x9e0020a7, 0xf9002219, 0xfb00221a, 0xec00221e, + 0xef002229, 0xf7002248, 0xf0002261, 0xf3002264, 0xf2002265, 0xf4002320, 0xf5002321, 0xc4002500, + 0xb3002502, 0xda00250c, 0xbf002510, 0xc0002514, 0xd9002518, 0xc300251c, 0xb4002524, 0xc200252c, + 0xc1002534, 0xc500253c, 0xcd002550, 0xba002551, 0xd5002552, 0xd6002553, 0xc9002554, 0xb8002555, + 0xb7002556, 0xbb002557, 0xd4002558, 0xd3002559, 0xc800255a, 0xbe00255b, 0xbd00255c, 0xbc00255d, + 0xc600255e, 0xc700255f, 0xcc002560, 0xb5002561, 0xb6002562, 0xb9002563, 0xd1002564, 0xd2002565, + 0xcb002566, 0xcf002567, 0xd0002568, 0xca002569, 0xd800256a, 0xd700256b, 0xce00256c, 0xdf002580, + 0xdc002584, 0xdb002588, 0xdd00258c, 0xde002590, 0xb0002591, 0xb1002592, 0xb2002593, 0xfe0025a0, + }, +} + +// CodePage862 is the IBM Code Page 862 encoding. +var CodePage862 *Charmap = &codePage862 + +var codePage862 = Charmap{ + name: "IBM Code Page 862", + mib: identifier.PC862LatinHebrew, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xd7, 0x90, 0x00}}, {2, [3]byte{0xd7, 0x91, 0x00}}, + {2, [3]byte{0xd7, 0x92, 0x00}}, {2, [3]byte{0xd7, 0x93, 0x00}}, + {2, [3]byte{0xd7, 0x94, 0x00}}, {2, [3]byte{0xd7, 0x95, 0x00}}, + {2, [3]byte{0xd7, 0x96, 0x00}}, {2, [3]byte{0xd7, 0x97, 0x00}}, + {2, [3]byte{0xd7, 0x98, 0x00}}, {2, [3]byte{0xd7, 0x99, 0x00}}, + {2, [3]byte{0xd7, 0x9a, 0x00}}, {2, [3]byte{0xd7, 0x9b, 0x00}}, + {2, [3]byte{0xd7, 0x9c, 0x00}}, {2, [3]byte{0xd7, 0x9d, 0x00}}, + {2, [3]byte{0xd7, 0x9e, 0x00}}, {2, [3]byte{0xd7, 0x9f, 0x00}}, + {2, [3]byte{0xd7, 0xa0, 0x00}}, {2, [3]byte{0xd7, 0xa1, 0x00}}, + {2, [3]byte{0xd7, 0xa2, 0x00}}, {2, [3]byte{0xd7, 0xa3, 0x00}}, + {2, [3]byte{0xd7, 0xa4, 0x00}}, {2, [3]byte{0xd7, 0xa5, 0x00}}, + {2, [3]byte{0xd7, 0xa6, 0x00}}, {2, [3]byte{0xd7, 0xa7, 0x00}}, + {2, [3]byte{0xd7, 0xa8, 0x00}}, {2, [3]byte{0xd7, 0xa9, 0x00}}, + {2, [3]byte{0xd7, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xa2, 0x00}}, + {2, [3]byte{0xc2, 0xa3, 0x00}}, {2, [3]byte{0xc2, 0xa5, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xa7}}, {2, [3]byte{0xc6, 0x92, 0x00}}, + {2, [3]byte{0xc3, 0xa1, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xb3, 0x00}}, {2, [3]byte{0xc3, 0xba, 0x00}}, + {2, [3]byte{0xc3, 0xb1, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc2, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xba, 0x00}}, + {2, [3]byte{0xc2, 0xbf, 0x00}}, {3, [3]byte{0xe2, 0x8c, 0x90}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xa1, 0x00}}, + {2, [3]byte{0xc2, 0xab, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0x91}}, {3, [3]byte{0xe2, 0x96, 0x92}}, + {3, [3]byte{0xe2, 0x96, 0x93}}, {3, [3]byte{0xe2, 0x94, 0x82}}, + {3, [3]byte{0xe2, 0x94, 0xa4}}, {3, [3]byte{0xe2, 0x95, 0xa1}}, + {3, [3]byte{0xe2, 0x95, 0xa2}}, {3, [3]byte{0xe2, 0x95, 0x96}}, + {3, [3]byte{0xe2, 0x95, 0x95}}, {3, [3]byte{0xe2, 0x95, 0xa3}}, + {3, [3]byte{0xe2, 0x95, 0x91}}, {3, [3]byte{0xe2, 0x95, 0x97}}, + {3, [3]byte{0xe2, 0x95, 0x9d}}, {3, [3]byte{0xe2, 0x95, 0x9c}}, + {3, [3]byte{0xe2, 0x95, 0x9b}}, {3, [3]byte{0xe2, 0x94, 0x90}}, + {3, [3]byte{0xe2, 0x94, 0x94}}, {3, [3]byte{0xe2, 0x94, 0xb4}}, + {3, [3]byte{0xe2, 0x94, 0xac}}, {3, [3]byte{0xe2, 0x94, 0x9c}}, + {3, [3]byte{0xe2, 0x94, 0x80}}, {3, [3]byte{0xe2, 0x94, 0xbc}}, + {3, [3]byte{0xe2, 0x95, 0x9e}}, {3, [3]byte{0xe2, 0x95, 0x9f}}, + {3, [3]byte{0xe2, 0x95, 0x9a}}, {3, [3]byte{0xe2, 0x95, 0x94}}, + {3, [3]byte{0xe2, 0x95, 0xa9}}, {3, [3]byte{0xe2, 0x95, 0xa6}}, + {3, [3]byte{0xe2, 0x95, 0xa0}}, {3, [3]byte{0xe2, 0x95, 0x90}}, + {3, [3]byte{0xe2, 0x95, 0xac}}, {3, [3]byte{0xe2, 0x95, 0xa7}}, + {3, [3]byte{0xe2, 0x95, 0xa8}}, {3, [3]byte{0xe2, 0x95, 0xa4}}, + {3, [3]byte{0xe2, 0x95, 0xa5}}, {3, [3]byte{0xe2, 0x95, 0x99}}, + {3, [3]byte{0xe2, 0x95, 0x98}}, {3, [3]byte{0xe2, 0x95, 0x92}}, + {3, [3]byte{0xe2, 0x95, 0x93}}, {3, [3]byte{0xe2, 0x95, 0xab}}, + {3, [3]byte{0xe2, 0x95, 0xaa}}, {3, [3]byte{0xe2, 0x94, 0x98}}, + {3, [3]byte{0xe2, 0x94, 0x8c}}, {3, [3]byte{0xe2, 0x96, 0x88}}, + {3, [3]byte{0xe2, 0x96, 0x84}}, {3, [3]byte{0xe2, 0x96, 0x8c}}, + {3, [3]byte{0xe2, 0x96, 0x90}}, {3, [3]byte{0xe2, 0x96, 0x80}}, + {2, [3]byte{0xce, 0xb1, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xce, 0x93, 0x00}}, {2, [3]byte{0xcf, 0x80, 0x00}}, + {2, [3]byte{0xce, 0xa3, 0x00}}, {2, [3]byte{0xcf, 0x83, 0x00}}, + {2, [3]byte{0xc2, 0xb5, 0x00}}, {2, [3]byte{0xcf, 0x84, 0x00}}, + {2, [3]byte{0xce, 0xa6, 0x00}}, {2, [3]byte{0xce, 0x98, 0x00}}, + {2, [3]byte{0xce, 0xa9, 0x00}}, {2, [3]byte{0xce, 0xb4, 0x00}}, + {3, [3]byte{0xe2, 0x88, 0x9e}}, {2, [3]byte{0xcf, 0x86, 0x00}}, + {2, [3]byte{0xce, 0xb5, 0x00}}, {3, [3]byte{0xe2, 0x88, 0xa9}}, + {3, [3]byte{0xe2, 0x89, 0xa1}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {3, [3]byte{0xe2, 0x89, 0xa5}}, {3, [3]byte{0xe2, 0x89, 0xa4}}, + {3, [3]byte{0xe2, 0x8c, 0xa0}}, {3, [3]byte{0xe2, 0x8c, 0xa1}}, + {2, [3]byte{0xc3, 0xb7, 0x00}}, {3, [3]byte{0xe2, 0x89, 0x88}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {3, [3]byte{0xe2, 0x88, 0x99}}, + {2, [3]byte{0xc2, 0xb7, 0x00}}, {3, [3]byte{0xe2, 0x88, 0x9a}}, + {3, [3]byte{0xe2, 0x81, 0xbf}}, {2, [3]byte{0xc2, 0xb2, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0xa0}}, {2, [3]byte{0xc2, 0xa0, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xff0000a0, 0xad0000a1, 0x9b0000a2, 0x9c0000a3, 0x9d0000a5, 0xa60000aa, 0xae0000ab, 0xaa0000ac, + 0xf80000b0, 0xf10000b1, 0xfd0000b2, 0xe60000b5, 0xfa0000b7, 0xa70000ba, 0xaf0000bb, 0xac0000bc, + 0xab0000bd, 0xa80000bf, 0xa50000d1, 0xe10000df, 0xa00000e1, 0xa10000ed, 0xa40000f1, 0xa20000f3, + 0xf60000f7, 0xa30000fa, 0x9f000192, 0xe2000393, 0xe9000398, 0xe40003a3, 0xe80003a6, 0xea0003a9, + 0xe00003b1, 0xeb0003b4, 0xee0003b5, 0xe30003c0, 0xe50003c3, 0xe70003c4, 0xed0003c6, 0x800005d0, + 0x810005d1, 0x820005d2, 0x830005d3, 0x840005d4, 0x850005d5, 0x860005d6, 0x870005d7, 0x880005d8, + 0x890005d9, 0x8a0005da, 0x8b0005db, 0x8c0005dc, 0x8d0005dd, 0x8e0005de, 0x8f0005df, 0x900005e0, + 0x910005e1, 0x920005e2, 0x930005e3, 0x940005e4, 0x950005e5, 0x960005e6, 0x970005e7, 0x980005e8, + 0x990005e9, 0x9a0005ea, 0xfc00207f, 0x9e0020a7, 0xf9002219, 0xfb00221a, 0xec00221e, 0xef002229, + 0xf7002248, 0xf0002261, 0xf3002264, 0xf2002265, 0xa9002310, 0xf4002320, 0xf5002321, 0xc4002500, + 0xb3002502, 0xda00250c, 0xbf002510, 0xc0002514, 0xd9002518, 0xc300251c, 0xb4002524, 0xc200252c, + 0xc1002534, 0xc500253c, 0xcd002550, 0xba002551, 0xd5002552, 0xd6002553, 0xc9002554, 0xb8002555, + 0xb7002556, 0xbb002557, 0xd4002558, 0xd3002559, 0xc800255a, 0xbe00255b, 0xbd00255c, 0xbc00255d, + 0xc600255e, 0xc700255f, 0xcc002560, 0xb5002561, 0xb6002562, 0xb9002563, 0xd1002564, 0xd2002565, + 0xcb002566, 0xcf002567, 0xd0002568, 0xca002569, 0xd800256a, 0xd700256b, 0xce00256c, 0xdf002580, + 0xdc002584, 0xdb002588, 0xdd00258c, 0xde002590, 0xb0002591, 0xb1002592, 0xb2002593, 0xfe0025a0, + }, +} + +// CodePage863 is the IBM Code Page 863 encoding. +var CodePage863 *Charmap = &codePage863 + +var codePage863 = Charmap{ + name: "IBM Code Page 863", + mib: identifier.IBM863, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0x87, 0x00}}, {2, [3]byte{0xc3, 0xbc, 0x00}}, + {2, [3]byte{0xc3, 0xa9, 0x00}}, {2, [3]byte{0xc3, 0xa2, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc3, 0xa0, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {3, [3]byte{0xe2, 0x80, 0x97}}, + {2, [3]byte{0xc3, 0x80, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0x89, 0x00}}, {2, [3]byte{0xc3, 0x88, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0xb4, 0x00}}, + {2, [3]byte{0xc3, 0x8b, 0x00}}, {2, [3]byte{0xc3, 0x8f, 0x00}}, + {2, [3]byte{0xc3, 0xbb, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0x94, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc2, 0xa2, 0x00}}, + {2, [3]byte{0xc2, 0xa3, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {2, [3]byte{0xc3, 0x9b, 0x00}}, {2, [3]byte{0xc6, 0x92, 0x00}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xb4, 0x00}}, + {2, [3]byte{0xc3, 0xb3, 0x00}}, {2, [3]byte{0xc3, 0xba, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {2, [3]byte{0xc2, 0xb8, 0x00}}, + {2, [3]byte{0xc2, 0xb3, 0x00}}, {2, [3]byte{0xc2, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {3, [3]byte{0xe2, 0x8c, 0x90}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xbe, 0x00}}, + {2, [3]byte{0xc2, 0xab, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0x91}}, {3, [3]byte{0xe2, 0x96, 0x92}}, + {3, [3]byte{0xe2, 0x96, 0x93}}, {3, [3]byte{0xe2, 0x94, 0x82}}, + {3, [3]byte{0xe2, 0x94, 0xa4}}, {3, [3]byte{0xe2, 0x95, 0xa1}}, + {3, [3]byte{0xe2, 0x95, 0xa2}}, {3, [3]byte{0xe2, 0x95, 0x96}}, + {3, [3]byte{0xe2, 0x95, 0x95}}, {3, [3]byte{0xe2, 0x95, 0xa3}}, + {3, [3]byte{0xe2, 0x95, 0x91}}, {3, [3]byte{0xe2, 0x95, 0x97}}, + {3, [3]byte{0xe2, 0x95, 0x9d}}, {3, [3]byte{0xe2, 0x95, 0x9c}}, + {3, [3]byte{0xe2, 0x95, 0x9b}}, {3, [3]byte{0xe2, 0x94, 0x90}}, + {3, [3]byte{0xe2, 0x94, 0x94}}, {3, [3]byte{0xe2, 0x94, 0xb4}}, + {3, [3]byte{0xe2, 0x94, 0xac}}, {3, [3]byte{0xe2, 0x94, 0x9c}}, + {3, [3]byte{0xe2, 0x94, 0x80}}, {3, [3]byte{0xe2, 0x94, 0xbc}}, + {3, [3]byte{0xe2, 0x95, 0x9e}}, {3, [3]byte{0xe2, 0x95, 0x9f}}, + {3, [3]byte{0xe2, 0x95, 0x9a}}, {3, [3]byte{0xe2, 0x95, 0x94}}, + {3, [3]byte{0xe2, 0x95, 0xa9}}, {3, [3]byte{0xe2, 0x95, 0xa6}}, + {3, [3]byte{0xe2, 0x95, 0xa0}}, {3, [3]byte{0xe2, 0x95, 0x90}}, + {3, [3]byte{0xe2, 0x95, 0xac}}, {3, [3]byte{0xe2, 0x95, 0xa7}}, + {3, [3]byte{0xe2, 0x95, 0xa8}}, {3, [3]byte{0xe2, 0x95, 0xa4}}, + {3, [3]byte{0xe2, 0x95, 0xa5}}, {3, [3]byte{0xe2, 0x95, 0x99}}, + {3, [3]byte{0xe2, 0x95, 0x98}}, {3, [3]byte{0xe2, 0x95, 0x92}}, + {3, [3]byte{0xe2, 0x95, 0x93}}, {3, [3]byte{0xe2, 0x95, 0xab}}, + {3, [3]byte{0xe2, 0x95, 0xaa}}, {3, [3]byte{0xe2, 0x94, 0x98}}, + {3, [3]byte{0xe2, 0x94, 0x8c}}, {3, [3]byte{0xe2, 0x96, 0x88}}, + {3, [3]byte{0xe2, 0x96, 0x84}}, {3, [3]byte{0xe2, 0x96, 0x8c}}, + {3, [3]byte{0xe2, 0x96, 0x90}}, {3, [3]byte{0xe2, 0x96, 0x80}}, + {2, [3]byte{0xce, 0xb1, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xce, 0x93, 0x00}}, {2, [3]byte{0xcf, 0x80, 0x00}}, + {2, [3]byte{0xce, 0xa3, 0x00}}, {2, [3]byte{0xcf, 0x83, 0x00}}, + {2, [3]byte{0xc2, 0xb5, 0x00}}, {2, [3]byte{0xcf, 0x84, 0x00}}, + {2, [3]byte{0xce, 0xa6, 0x00}}, {2, [3]byte{0xce, 0x98, 0x00}}, + {2, [3]byte{0xce, 0xa9, 0x00}}, {2, [3]byte{0xce, 0xb4, 0x00}}, + {3, [3]byte{0xe2, 0x88, 0x9e}}, {2, [3]byte{0xcf, 0x86, 0x00}}, + {2, [3]byte{0xce, 0xb5, 0x00}}, {3, [3]byte{0xe2, 0x88, 0xa9}}, + {3, [3]byte{0xe2, 0x89, 0xa1}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {3, [3]byte{0xe2, 0x89, 0xa5}}, {3, [3]byte{0xe2, 0x89, 0xa4}}, + {3, [3]byte{0xe2, 0x8c, 0xa0}}, {3, [3]byte{0xe2, 0x8c, 0xa1}}, + {2, [3]byte{0xc3, 0xb7, 0x00}}, {3, [3]byte{0xe2, 0x89, 0x88}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {3, [3]byte{0xe2, 0x88, 0x99}}, + {2, [3]byte{0xc2, 0xb7, 0x00}}, {3, [3]byte{0xe2, 0x88, 0x9a}}, + {3, [3]byte{0xe2, 0x81, 0xbf}}, {2, [3]byte{0xc2, 0xb2, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0xa0}}, {2, [3]byte{0xc2, 0xa0, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xff0000a0, 0x9b0000a2, 0x9c0000a3, 0x980000a4, 0xa00000a6, 0x8f0000a7, 0xa40000a8, 0xae0000ab, + 0xaa0000ac, 0xa70000af, 0xf80000b0, 0xf10000b1, 0xfd0000b2, 0xa60000b3, 0xa10000b4, 0xe60000b5, + 0x860000b6, 0xfa0000b7, 0xa50000b8, 0xaf0000bb, 0xac0000bc, 0xab0000bd, 0xad0000be, 0x8e0000c0, + 0x840000c2, 0x800000c7, 0x910000c8, 0x900000c9, 0x920000ca, 0x940000cb, 0xa80000ce, 0x950000cf, + 0x990000d4, 0x9d0000d9, 0x9e0000db, 0x9a0000dc, 0xe10000df, 0x850000e0, 0x830000e2, 0x870000e7, + 0x8a0000e8, 0x820000e9, 0x880000ea, 0x890000eb, 0x8c0000ee, 0x8b0000ef, 0xa20000f3, 0x930000f4, + 0xf60000f7, 0x970000f9, 0xa30000fa, 0x960000fb, 0x810000fc, 0x9f000192, 0xe2000393, 0xe9000398, + 0xe40003a3, 0xe80003a6, 0xea0003a9, 0xe00003b1, 0xeb0003b4, 0xee0003b5, 0xe30003c0, 0xe50003c3, + 0xe70003c4, 0xed0003c6, 0x8d002017, 0xfc00207f, 0xf9002219, 0xfb00221a, 0xec00221e, 0xef002229, + 0xf7002248, 0xf0002261, 0xf3002264, 0xf2002265, 0xa9002310, 0xf4002320, 0xf5002321, 0xc4002500, + 0xb3002502, 0xda00250c, 0xbf002510, 0xc0002514, 0xd9002518, 0xc300251c, 0xb4002524, 0xc200252c, + 0xc1002534, 0xc500253c, 0xcd002550, 0xba002551, 0xd5002552, 0xd6002553, 0xc9002554, 0xb8002555, + 0xb7002556, 0xbb002557, 0xd4002558, 0xd3002559, 0xc800255a, 0xbe00255b, 0xbd00255c, 0xbc00255d, + 0xc600255e, 0xc700255f, 0xcc002560, 0xb5002561, 0xb6002562, 0xb9002563, 0xd1002564, 0xd2002565, + 0xcb002566, 0xcf002567, 0xd0002568, 0xca002569, 0xd800256a, 0xd700256b, 0xce00256c, 0xdf002580, + 0xdc002584, 0xdb002588, 0xdd00258c, 0xde002590, 0xb0002591, 0xb1002592, 0xb2002593, 0xfe0025a0, + }, +} + +// CodePage865 is the IBM Code Page 865 encoding. +var CodePage865 *Charmap = &codePage865 + +var codePage865 = Charmap{ + name: "IBM Code Page 865", + mib: identifier.IBM865, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0x87, 0x00}}, {2, [3]byte{0xc3, 0xbc, 0x00}}, + {2, [3]byte{0xc3, 0xa9, 0x00}}, {2, [3]byte{0xc3, 0xa2, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa0, 0x00}}, + {2, [3]byte{0xc3, 0xa5, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xac, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x89, 0x00}}, {2, [3]byte{0xc3, 0xa6, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc3, 0xb4, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb2, 0x00}}, + {2, [3]byte{0xc3, 0xbb, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xbf, 0x00}}, {2, [3]byte{0xc3, 0x96, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0xb8, 0x00}}, + {2, [3]byte{0xc2, 0xa3, 0x00}}, {2, [3]byte{0xc3, 0x98, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xa7}}, {2, [3]byte{0xc6, 0x92, 0x00}}, + {2, [3]byte{0xc3, 0xa1, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xb3, 0x00}}, {2, [3]byte{0xc3, 0xba, 0x00}}, + {2, [3]byte{0xc3, 0xb1, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc2, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xba, 0x00}}, + {2, [3]byte{0xc2, 0xbf, 0x00}}, {3, [3]byte{0xe2, 0x8c, 0x90}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xa1, 0x00}}, + {2, [3]byte{0xc2, 0xab, 0x00}}, {2, [3]byte{0xc2, 0xa4, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0x91}}, {3, [3]byte{0xe2, 0x96, 0x92}}, + {3, [3]byte{0xe2, 0x96, 0x93}}, {3, [3]byte{0xe2, 0x94, 0x82}}, + {3, [3]byte{0xe2, 0x94, 0xa4}}, {3, [3]byte{0xe2, 0x95, 0xa1}}, + {3, [3]byte{0xe2, 0x95, 0xa2}}, {3, [3]byte{0xe2, 0x95, 0x96}}, + {3, [3]byte{0xe2, 0x95, 0x95}}, {3, [3]byte{0xe2, 0x95, 0xa3}}, + {3, [3]byte{0xe2, 0x95, 0x91}}, {3, [3]byte{0xe2, 0x95, 0x97}}, + {3, [3]byte{0xe2, 0x95, 0x9d}}, {3, [3]byte{0xe2, 0x95, 0x9c}}, + {3, [3]byte{0xe2, 0x95, 0x9b}}, {3, [3]byte{0xe2, 0x94, 0x90}}, + {3, [3]byte{0xe2, 0x94, 0x94}}, {3, [3]byte{0xe2, 0x94, 0xb4}}, + {3, [3]byte{0xe2, 0x94, 0xac}}, {3, [3]byte{0xe2, 0x94, 0x9c}}, + {3, [3]byte{0xe2, 0x94, 0x80}}, {3, [3]byte{0xe2, 0x94, 0xbc}}, + {3, [3]byte{0xe2, 0x95, 0x9e}}, {3, [3]byte{0xe2, 0x95, 0x9f}}, + {3, [3]byte{0xe2, 0x95, 0x9a}}, {3, [3]byte{0xe2, 0x95, 0x94}}, + {3, [3]byte{0xe2, 0x95, 0xa9}}, {3, [3]byte{0xe2, 0x95, 0xa6}}, + {3, [3]byte{0xe2, 0x95, 0xa0}}, {3, [3]byte{0xe2, 0x95, 0x90}}, + {3, [3]byte{0xe2, 0x95, 0xac}}, {3, [3]byte{0xe2, 0x95, 0xa7}}, + {3, [3]byte{0xe2, 0x95, 0xa8}}, {3, [3]byte{0xe2, 0x95, 0xa4}}, + {3, [3]byte{0xe2, 0x95, 0xa5}}, {3, [3]byte{0xe2, 0x95, 0x99}}, + {3, [3]byte{0xe2, 0x95, 0x98}}, {3, [3]byte{0xe2, 0x95, 0x92}}, + {3, [3]byte{0xe2, 0x95, 0x93}}, {3, [3]byte{0xe2, 0x95, 0xab}}, + {3, [3]byte{0xe2, 0x95, 0xaa}}, {3, [3]byte{0xe2, 0x94, 0x98}}, + {3, [3]byte{0xe2, 0x94, 0x8c}}, {3, [3]byte{0xe2, 0x96, 0x88}}, + {3, [3]byte{0xe2, 0x96, 0x84}}, {3, [3]byte{0xe2, 0x96, 0x8c}}, + {3, [3]byte{0xe2, 0x96, 0x90}}, {3, [3]byte{0xe2, 0x96, 0x80}}, + {2, [3]byte{0xce, 0xb1, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xce, 0x93, 0x00}}, {2, [3]byte{0xcf, 0x80, 0x00}}, + {2, [3]byte{0xce, 0xa3, 0x00}}, {2, [3]byte{0xcf, 0x83, 0x00}}, + {2, [3]byte{0xc2, 0xb5, 0x00}}, {2, [3]byte{0xcf, 0x84, 0x00}}, + {2, [3]byte{0xce, 0xa6, 0x00}}, {2, [3]byte{0xce, 0x98, 0x00}}, + {2, [3]byte{0xce, 0xa9, 0x00}}, {2, [3]byte{0xce, 0xb4, 0x00}}, + {3, [3]byte{0xe2, 0x88, 0x9e}}, {2, [3]byte{0xcf, 0x86, 0x00}}, + {2, [3]byte{0xce, 0xb5, 0x00}}, {3, [3]byte{0xe2, 0x88, 0xa9}}, + {3, [3]byte{0xe2, 0x89, 0xa1}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {3, [3]byte{0xe2, 0x89, 0xa5}}, {3, [3]byte{0xe2, 0x89, 0xa4}}, + {3, [3]byte{0xe2, 0x8c, 0xa0}}, {3, [3]byte{0xe2, 0x8c, 0xa1}}, + {2, [3]byte{0xc3, 0xb7, 0x00}}, {3, [3]byte{0xe2, 0x89, 0x88}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {3, [3]byte{0xe2, 0x88, 0x99}}, + {2, [3]byte{0xc2, 0xb7, 0x00}}, {3, [3]byte{0xe2, 0x88, 0x9a}}, + {3, [3]byte{0xe2, 0x81, 0xbf}}, {2, [3]byte{0xc2, 0xb2, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0xa0}}, {2, [3]byte{0xc2, 0xa0, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xff0000a0, 0xad0000a1, 0x9c0000a3, 0xaf0000a4, 0xa60000aa, 0xae0000ab, 0xaa0000ac, 0xf80000b0, + 0xf10000b1, 0xfd0000b2, 0xe60000b5, 0xfa0000b7, 0xa70000ba, 0xac0000bc, 0xab0000bd, 0xa80000bf, + 0x8e0000c4, 0x8f0000c5, 0x920000c6, 0x800000c7, 0x900000c9, 0xa50000d1, 0x990000d6, 0x9d0000d8, + 0x9a0000dc, 0xe10000df, 0x850000e0, 0xa00000e1, 0x830000e2, 0x840000e4, 0x860000e5, 0x910000e6, + 0x870000e7, 0x8a0000e8, 0x820000e9, 0x880000ea, 0x890000eb, 0x8d0000ec, 0xa10000ed, 0x8c0000ee, + 0x8b0000ef, 0xa40000f1, 0x950000f2, 0xa20000f3, 0x930000f4, 0x940000f6, 0xf60000f7, 0x9b0000f8, + 0x970000f9, 0xa30000fa, 0x960000fb, 0x810000fc, 0x980000ff, 0x9f000192, 0xe2000393, 0xe9000398, + 0xe40003a3, 0xe80003a6, 0xea0003a9, 0xe00003b1, 0xeb0003b4, 0xee0003b5, 0xe30003c0, 0xe50003c3, + 0xe70003c4, 0xed0003c6, 0xfc00207f, 0x9e0020a7, 0xf9002219, 0xfb00221a, 0xec00221e, 0xef002229, + 0xf7002248, 0xf0002261, 0xf3002264, 0xf2002265, 0xa9002310, 0xf4002320, 0xf5002321, 0xc4002500, + 0xb3002502, 0xda00250c, 0xbf002510, 0xc0002514, 0xd9002518, 0xc300251c, 0xb4002524, 0xc200252c, + 0xc1002534, 0xc500253c, 0xcd002550, 0xba002551, 0xd5002552, 0xd6002553, 0xc9002554, 0xb8002555, + 0xb7002556, 0xbb002557, 0xd4002558, 0xd3002559, 0xc800255a, 0xbe00255b, 0xbd00255c, 0xbc00255d, + 0xc600255e, 0xc700255f, 0xcc002560, 0xb5002561, 0xb6002562, 0xb9002563, 0xd1002564, 0xd2002565, + 0xcb002566, 0xcf002567, 0xd0002568, 0xca002569, 0xd800256a, 0xd700256b, 0xce00256c, 0xdf002580, + 0xdc002584, 0xdb002588, 0xdd00258c, 0xde002590, 0xb0002591, 0xb1002592, 0xb2002593, 0xfe0025a0, + }, +} + +// CodePage866 is the IBM Code Page 866 encoding. +var CodePage866 *Charmap = &codePage866 + +var codePage866 = Charmap{ + name: "IBM Code Page 866", + mib: identifier.IBM866, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xd0, 0x90, 0x00}}, {2, [3]byte{0xd0, 0x91, 0x00}}, + {2, [3]byte{0xd0, 0x92, 0x00}}, {2, [3]byte{0xd0, 0x93, 0x00}}, + {2, [3]byte{0xd0, 0x94, 0x00}}, {2, [3]byte{0xd0, 0x95, 0x00}}, + {2, [3]byte{0xd0, 0x96, 0x00}}, {2, [3]byte{0xd0, 0x97, 0x00}}, + {2, [3]byte{0xd0, 0x98, 0x00}}, {2, [3]byte{0xd0, 0x99, 0x00}}, + {2, [3]byte{0xd0, 0x9a, 0x00}}, {2, [3]byte{0xd0, 0x9b, 0x00}}, + {2, [3]byte{0xd0, 0x9c, 0x00}}, {2, [3]byte{0xd0, 0x9d, 0x00}}, + {2, [3]byte{0xd0, 0x9e, 0x00}}, {2, [3]byte{0xd0, 0x9f, 0x00}}, + {2, [3]byte{0xd0, 0xa0, 0x00}}, {2, [3]byte{0xd0, 0xa1, 0x00}}, + {2, [3]byte{0xd0, 0xa2, 0x00}}, {2, [3]byte{0xd0, 0xa3, 0x00}}, + {2, [3]byte{0xd0, 0xa4, 0x00}}, {2, [3]byte{0xd0, 0xa5, 0x00}}, + {2, [3]byte{0xd0, 0xa6, 0x00}}, {2, [3]byte{0xd0, 0xa7, 0x00}}, + {2, [3]byte{0xd0, 0xa8, 0x00}}, {2, [3]byte{0xd0, 0xa9, 0x00}}, + {2, [3]byte{0xd0, 0xaa, 0x00}}, {2, [3]byte{0xd0, 0xab, 0x00}}, + {2, [3]byte{0xd0, 0xac, 0x00}}, {2, [3]byte{0xd0, 0xad, 0x00}}, + {2, [3]byte{0xd0, 0xae, 0x00}}, {2, [3]byte{0xd0, 0xaf, 0x00}}, + {2, [3]byte{0xd0, 0xb0, 0x00}}, {2, [3]byte{0xd0, 0xb1, 0x00}}, + {2, [3]byte{0xd0, 0xb2, 0x00}}, {2, [3]byte{0xd0, 0xb3, 0x00}}, + {2, [3]byte{0xd0, 0xb4, 0x00}}, {2, [3]byte{0xd0, 0xb5, 0x00}}, + {2, [3]byte{0xd0, 0xb6, 0x00}}, {2, [3]byte{0xd0, 0xb7, 0x00}}, + {2, [3]byte{0xd0, 0xb8, 0x00}}, {2, [3]byte{0xd0, 0xb9, 0x00}}, + {2, [3]byte{0xd0, 0xba, 0x00}}, {2, [3]byte{0xd0, 0xbb, 0x00}}, + {2, [3]byte{0xd0, 0xbc, 0x00}}, {2, [3]byte{0xd0, 0xbd, 0x00}}, + {2, [3]byte{0xd0, 0xbe, 0x00}}, {2, [3]byte{0xd0, 0xbf, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0x91}}, {3, [3]byte{0xe2, 0x96, 0x92}}, + {3, [3]byte{0xe2, 0x96, 0x93}}, {3, [3]byte{0xe2, 0x94, 0x82}}, + {3, [3]byte{0xe2, 0x94, 0xa4}}, {3, [3]byte{0xe2, 0x95, 0xa1}}, + {3, [3]byte{0xe2, 0x95, 0xa2}}, {3, [3]byte{0xe2, 0x95, 0x96}}, + {3, [3]byte{0xe2, 0x95, 0x95}}, {3, [3]byte{0xe2, 0x95, 0xa3}}, + {3, [3]byte{0xe2, 0x95, 0x91}}, {3, [3]byte{0xe2, 0x95, 0x97}}, + {3, [3]byte{0xe2, 0x95, 0x9d}}, {3, [3]byte{0xe2, 0x95, 0x9c}}, + {3, [3]byte{0xe2, 0x95, 0x9b}}, {3, [3]byte{0xe2, 0x94, 0x90}}, + {3, [3]byte{0xe2, 0x94, 0x94}}, {3, [3]byte{0xe2, 0x94, 0xb4}}, + {3, [3]byte{0xe2, 0x94, 0xac}}, {3, [3]byte{0xe2, 0x94, 0x9c}}, + {3, [3]byte{0xe2, 0x94, 0x80}}, {3, [3]byte{0xe2, 0x94, 0xbc}}, + {3, [3]byte{0xe2, 0x95, 0x9e}}, {3, [3]byte{0xe2, 0x95, 0x9f}}, + {3, [3]byte{0xe2, 0x95, 0x9a}}, {3, [3]byte{0xe2, 0x95, 0x94}}, + {3, [3]byte{0xe2, 0x95, 0xa9}}, {3, [3]byte{0xe2, 0x95, 0xa6}}, + {3, [3]byte{0xe2, 0x95, 0xa0}}, {3, [3]byte{0xe2, 0x95, 0x90}}, + {3, [3]byte{0xe2, 0x95, 0xac}}, {3, [3]byte{0xe2, 0x95, 0xa7}}, + {3, [3]byte{0xe2, 0x95, 0xa8}}, {3, [3]byte{0xe2, 0x95, 0xa4}}, + {3, [3]byte{0xe2, 0x95, 0xa5}}, {3, [3]byte{0xe2, 0x95, 0x99}}, + {3, [3]byte{0xe2, 0x95, 0x98}}, {3, [3]byte{0xe2, 0x95, 0x92}}, + {3, [3]byte{0xe2, 0x95, 0x93}}, {3, [3]byte{0xe2, 0x95, 0xab}}, + {3, [3]byte{0xe2, 0x95, 0xaa}}, {3, [3]byte{0xe2, 0x94, 0x98}}, + {3, [3]byte{0xe2, 0x94, 0x8c}}, {3, [3]byte{0xe2, 0x96, 0x88}}, + {3, [3]byte{0xe2, 0x96, 0x84}}, {3, [3]byte{0xe2, 0x96, 0x8c}}, + {3, [3]byte{0xe2, 0x96, 0x90}}, {3, [3]byte{0xe2, 0x96, 0x80}}, + {2, [3]byte{0xd1, 0x80, 0x00}}, {2, [3]byte{0xd1, 0x81, 0x00}}, + {2, [3]byte{0xd1, 0x82, 0x00}}, {2, [3]byte{0xd1, 0x83, 0x00}}, + {2, [3]byte{0xd1, 0x84, 0x00}}, {2, [3]byte{0xd1, 0x85, 0x00}}, + {2, [3]byte{0xd1, 0x86, 0x00}}, {2, [3]byte{0xd1, 0x87, 0x00}}, + {2, [3]byte{0xd1, 0x88, 0x00}}, {2, [3]byte{0xd1, 0x89, 0x00}}, + {2, [3]byte{0xd1, 0x8a, 0x00}}, {2, [3]byte{0xd1, 0x8b, 0x00}}, + {2, [3]byte{0xd1, 0x8c, 0x00}}, {2, [3]byte{0xd1, 0x8d, 0x00}}, + {2, [3]byte{0xd1, 0x8e, 0x00}}, {2, [3]byte{0xd1, 0x8f, 0x00}}, + {2, [3]byte{0xd0, 0x81, 0x00}}, {2, [3]byte{0xd1, 0x91, 0x00}}, + {2, [3]byte{0xd0, 0x84, 0x00}}, {2, [3]byte{0xd1, 0x94, 0x00}}, + {2, [3]byte{0xd0, 0x87, 0x00}}, {2, [3]byte{0xd1, 0x97, 0x00}}, + {2, [3]byte{0xd0, 0x8e, 0x00}}, {2, [3]byte{0xd1, 0x9e, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {3, [3]byte{0xe2, 0x88, 0x99}}, + {2, [3]byte{0xc2, 0xb7, 0x00}}, {3, [3]byte{0xe2, 0x88, 0x9a}}, + {3, [3]byte{0xe2, 0x84, 0x96}}, {2, [3]byte{0xc2, 0xa4, 0x00}}, + {3, [3]byte{0xe2, 0x96, 0xa0}}, {2, [3]byte{0xc2, 0xa0, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xff0000a0, 0xfd0000a4, 0xf80000b0, 0xfa0000b7, 0xf0000401, 0xf2000404, 0xf4000407, 0xf600040e, + 0x80000410, 0x81000411, 0x82000412, 0x83000413, 0x84000414, 0x85000415, 0x86000416, 0x87000417, + 0x88000418, 0x89000419, 0x8a00041a, 0x8b00041b, 0x8c00041c, 0x8d00041d, 0x8e00041e, 0x8f00041f, + 0x90000420, 0x91000421, 0x92000422, 0x93000423, 0x94000424, 0x95000425, 0x96000426, 0x97000427, + 0x98000428, 0x99000429, 0x9a00042a, 0x9b00042b, 0x9c00042c, 0x9d00042d, 0x9e00042e, 0x9f00042f, + 0xa0000430, 0xa1000431, 0xa2000432, 0xa3000433, 0xa4000434, 0xa5000435, 0xa6000436, 0xa7000437, + 0xa8000438, 0xa9000439, 0xaa00043a, 0xab00043b, 0xac00043c, 0xad00043d, 0xae00043e, 0xaf00043f, + 0xe0000440, 0xe1000441, 0xe2000442, 0xe3000443, 0xe4000444, 0xe5000445, 0xe6000446, 0xe7000447, + 0xe8000448, 0xe9000449, 0xea00044a, 0xeb00044b, 0xec00044c, 0xed00044d, 0xee00044e, 0xef00044f, + 0xf1000451, 0xf3000454, 0xf5000457, 0xf700045e, 0xfc002116, 0xf9002219, 0xfb00221a, 0xc4002500, + 0xb3002502, 0xda00250c, 0xbf002510, 0xc0002514, 0xd9002518, 0xc300251c, 0xb4002524, 0xc200252c, + 0xc1002534, 0xc500253c, 0xcd002550, 0xba002551, 0xd5002552, 0xd6002553, 0xc9002554, 0xb8002555, + 0xb7002556, 0xbb002557, 0xd4002558, 0xd3002559, 0xc800255a, 0xbe00255b, 0xbd00255c, 0xbc00255d, + 0xc600255e, 0xc700255f, 0xcc002560, 0xb5002561, 0xb6002562, 0xb9002563, 0xd1002564, 0xd2002565, + 0xcb002566, 0xcf002567, 0xd0002568, 0xca002569, 0xd800256a, 0xd700256b, 0xce00256c, 0xdf002580, + 0xdc002584, 0xdb002588, 0xdd00258c, 0xde002590, 0xb0002591, 0xb1002592, 0xb2002593, 0xfe0025a0, + }, +} + +// CodePage1047 is the IBM Code Page 1047 encoding. +var CodePage1047 *Charmap = &codePage1047 + +var codePage1047 = Charmap{ + name: "IBM Code Page 1047", + mib: identifier.IBM1047, + asciiSuperset: false, + low: 0x00, + replacement: 0x3f, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x9c, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x86, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x97, 0x00}}, {2, [3]byte{0xc2, 0x8d, 0x00}}, + {2, [3]byte{0xc2, 0x8e, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x9d, 0x00}}, {2, [3]byte{0xc2, 0x85, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {2, [3]byte{0xc2, 0x87, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x92, 0x00}}, {2, [3]byte{0xc2, 0x8f, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x80, 0x00}}, {2, [3]byte{0xc2, 0x81, 0x00}}, + {2, [3]byte{0xc2, 0x82, 0x00}}, {2, [3]byte{0xc2, 0x83, 0x00}}, + {2, [3]byte{0xc2, 0x84, 0x00}}, {1, [3]byte{0x0a, 0x00, 0x00}}, + {1, [3]byte{0x17, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x88, 0x00}}, {2, [3]byte{0xc2, 0x89, 0x00}}, + {2, [3]byte{0xc2, 0x8a, 0x00}}, {2, [3]byte{0xc2, 0x8b, 0x00}}, + {2, [3]byte{0xc2, 0x8c, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x90, 0x00}}, {2, [3]byte{0xc2, 0x91, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {2, [3]byte{0xc2, 0x93, 0x00}}, + {2, [3]byte{0xc2, 0x94, 0x00}}, {2, [3]byte{0xc2, 0x95, 0x00}}, + {2, [3]byte{0xc2, 0x96, 0x00}}, {1, [3]byte{0x04, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x98, 0x00}}, {2, [3]byte{0xc2, 0x99, 0x00}}, + {2, [3]byte{0xc2, 0x9a, 0x00}}, {2, [3]byte{0xc2, 0x9b, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x9e, 0x00}}, {1, [3]byte{0x1a, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {2, [3]byte{0xc2, 0xa0, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xc3, 0xa4, 0x00}}, + {2, [3]byte{0xc3, 0xa0, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa3, 0x00}}, {2, [3]byte{0xc3, 0xa5, 0x00}}, + {2, [3]byte{0xc3, 0xa7, 0x00}}, {2, [3]byte{0xc3, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xa2, 0x00}}, {1, [3]byte{0x2e, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x28, 0x00, 0x00}}, + {1, [3]byte{0x2b, 0x00, 0x00}}, {1, [3]byte{0x7c, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0xac, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {1, [3]byte{0x21, 0x00, 0x00}}, {1, [3]byte{0x24, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x3b, 0x00, 0x00}}, {1, [3]byte{0x5e, 0x00, 0x00}}, + {1, [3]byte{0x2d, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc3, 0x84, 0x00}}, + {2, [3]byte{0xc3, 0x80, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x83, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x87, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {1, [3]byte{0x2c, 0x00, 0x00}}, + {1, [3]byte{0x25, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0xb8, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc3, 0x88, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc3, 0x8f, 0x00}}, + {2, [3]byte{0xc3, 0x8c, 0x00}}, {1, [3]byte{0x60, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x3d, 0x00, 0x00}}, {1, [3]byte{0x22, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0x98, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xab, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xb0, 0x00}}, {2, [3]byte{0xc3, 0xbd, 0x00}}, + {2, [3]byte{0xc3, 0xbe, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {1, [3]byte{0x6a, 0x00, 0x00}}, + {1, [3]byte{0x6b, 0x00, 0x00}}, {1, [3]byte{0x6c, 0x00, 0x00}}, + {1, [3]byte{0x6d, 0x00, 0x00}}, {1, [3]byte{0x6e, 0x00, 0x00}}, + {1, [3]byte{0x6f, 0x00, 0x00}}, {1, [3]byte{0x70, 0x00, 0x00}}, + {1, [3]byte{0x71, 0x00, 0x00}}, {1, [3]byte{0x72, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xba, 0x00}}, + {2, [3]byte{0xc3, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xb8, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc2, 0xa4, 0x00}}, + {2, [3]byte{0xc2, 0xb5, 0x00}}, {1, [3]byte{0x7e, 0x00, 0x00}}, + {1, [3]byte{0x73, 0x00, 0x00}}, {1, [3]byte{0x74, 0x00, 0x00}}, + {1, [3]byte{0x75, 0x00, 0x00}}, {1, [3]byte{0x76, 0x00, 0x00}}, + {1, [3]byte{0x77, 0x00, 0x00}}, {1, [3]byte{0x78, 0x00, 0x00}}, + {1, [3]byte{0x79, 0x00, 0x00}}, {1, [3]byte{0x7a, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xa1, 0x00}}, {2, [3]byte{0xc2, 0xbf, 0x00}}, + {2, [3]byte{0xc3, 0x90, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0x9e, 0x00}}, {2, [3]byte{0xc2, 0xae, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa5, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc2, 0xa9, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xbc, 0x00}}, + {2, [3]byte{0xc2, 0xbd, 0x00}}, {2, [3]byte{0xc2, 0xbe, 0x00}}, + {2, [3]byte{0xc3, 0x9d, 0x00}}, {2, [3]byte{0xc2, 0xa8, 0x00}}, + {2, [3]byte{0xc2, 0xaf, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {1, [3]byte{0x7b, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xad, 0x00}}, {2, [3]byte{0xc3, 0xb4, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb2, 0x00}}, + {2, [3]byte{0xc3, 0xb3, 0x00}}, {2, [3]byte{0xc3, 0xb5, 0x00}}, + {1, [3]byte{0x7d, 0x00, 0x00}}, {1, [3]byte{0x4a, 0x00, 0x00}}, + {1, [3]byte{0x4b, 0x00, 0x00}}, {1, [3]byte{0x4c, 0x00, 0x00}}, + {1, [3]byte{0x4d, 0x00, 0x00}}, {1, [3]byte{0x4e, 0x00, 0x00}}, + {1, [3]byte{0x4f, 0x00, 0x00}}, {1, [3]byte{0x50, 0x00, 0x00}}, + {1, [3]byte{0x51, 0x00, 0x00}}, {1, [3]byte{0x52, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xb9, 0x00}}, {2, [3]byte{0xc3, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xbf, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {1, [3]byte{0x53, 0x00, 0x00}}, {1, [3]byte{0x54, 0x00, 0x00}}, + {1, [3]byte{0x55, 0x00, 0x00}}, {1, [3]byte{0x56, 0x00, 0x00}}, + {1, [3]byte{0x57, 0x00, 0x00}}, {1, [3]byte{0x58, 0x00, 0x00}}, + {1, [3]byte{0x59, 0x00, 0x00}}, {1, [3]byte{0x5a, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc3, 0x94, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x92, 0x00}}, + {2, [3]byte{0xc3, 0x93, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xb3, 0x00}}, {2, [3]byte{0xc3, 0x9b, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc2, 0x9f, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x37000004, 0x2d000005, 0x2e000006, 0x2f000007, + 0x16000008, 0x05000009, 0x2500000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x3c000014, 0x3d000015, 0x32000016, 0x26000017, + 0x18000018, 0x19000019, 0x3f00001a, 0x2700001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x40000020, 0x5a000021, 0x7f000022, 0x7b000023, 0x5b000024, 0x6c000025, 0x50000026, 0x7d000027, + 0x4d000028, 0x5d000029, 0x5c00002a, 0x4e00002b, 0x6b00002c, 0x6000002d, 0x4b00002e, 0x6100002f, + 0xf0000030, 0xf1000031, 0xf2000032, 0xf3000033, 0xf4000034, 0xf5000035, 0xf6000036, 0xf7000037, + 0xf8000038, 0xf9000039, 0x7a00003a, 0x5e00003b, 0x4c00003c, 0x7e00003d, 0x6e00003e, 0x6f00003f, + 0x7c000040, 0xc1000041, 0xc2000042, 0xc3000043, 0xc4000044, 0xc5000045, 0xc6000046, 0xc7000047, + 0xc8000048, 0xc9000049, 0xd100004a, 0xd200004b, 0xd300004c, 0xd400004d, 0xd500004e, 0xd600004f, + 0xd7000050, 0xd8000051, 0xd9000052, 0xe2000053, 0xe3000054, 0xe4000055, 0xe5000056, 0xe6000057, + 0xe7000058, 0xe8000059, 0xe900005a, 0xad00005b, 0xe000005c, 0xbd00005d, 0x5f00005e, 0x6d00005f, + 0x79000060, 0x81000061, 0x82000062, 0x83000063, 0x84000064, 0x85000065, 0x86000066, 0x87000067, + 0x88000068, 0x89000069, 0x9100006a, 0x9200006b, 0x9300006c, 0x9400006d, 0x9500006e, 0x9600006f, + 0x97000070, 0x98000071, 0x99000072, 0xa2000073, 0xa3000074, 0xa4000075, 0xa5000076, 0xa6000077, + 0xa7000078, 0xa8000079, 0xa900007a, 0xc000007b, 0x4f00007c, 0xd000007d, 0xa100007e, 0x0700007f, + 0x20000080, 0x21000081, 0x22000082, 0x23000083, 0x24000084, 0x15000085, 0x06000086, 0x17000087, + 0x28000088, 0x29000089, 0x2a00008a, 0x2b00008b, 0x2c00008c, 0x0900008d, 0x0a00008e, 0x1b00008f, + 0x30000090, 0x31000091, 0x1a000092, 0x33000093, 0x34000094, 0x35000095, 0x36000096, 0x08000097, + 0x38000098, 0x39000099, 0x3a00009a, 0x3b00009b, 0x0400009c, 0x1400009d, 0x3e00009e, 0xff00009f, + 0x410000a0, 0xaa0000a1, 0x4a0000a2, 0xb10000a3, 0x9f0000a4, 0xb20000a5, 0x6a0000a6, 0xb50000a7, + 0xbb0000a8, 0xb40000a9, 0x9a0000aa, 0x8a0000ab, 0xb00000ac, 0xca0000ad, 0xaf0000ae, 0xbc0000af, + 0x900000b0, 0x8f0000b1, 0xea0000b2, 0xfa0000b3, 0xbe0000b4, 0xa00000b5, 0xb60000b6, 0xb30000b7, + 0x9d0000b8, 0xda0000b9, 0x9b0000ba, 0x8b0000bb, 0xb70000bc, 0xb80000bd, 0xb90000be, 0xab0000bf, + 0x640000c0, 0x650000c1, 0x620000c2, 0x660000c3, 0x630000c4, 0x670000c5, 0x9e0000c6, 0x680000c7, + 0x740000c8, 0x710000c9, 0x720000ca, 0x730000cb, 0x780000cc, 0x750000cd, 0x760000ce, 0x770000cf, + 0xac0000d0, 0x690000d1, 0xed0000d2, 0xee0000d3, 0xeb0000d4, 0xef0000d5, 0xec0000d6, 0xbf0000d7, + 0x800000d8, 0xfd0000d9, 0xfe0000da, 0xfb0000db, 0xfc0000dc, 0xba0000dd, 0xae0000de, 0x590000df, + 0x440000e0, 0x450000e1, 0x420000e2, 0x460000e3, 0x430000e4, 0x470000e5, 0x9c0000e6, 0x480000e7, + 0x540000e8, 0x510000e9, 0x520000ea, 0x530000eb, 0x580000ec, 0x550000ed, 0x560000ee, 0x570000ef, + 0x8c0000f0, 0x490000f1, 0xcd0000f2, 0xce0000f3, 0xcb0000f4, 0xcf0000f5, 0xcc0000f6, 0xe10000f7, + 0x700000f8, 0xdd0000f9, 0xde0000fa, 0xdb0000fb, 0xdc0000fc, 0x8d0000fd, 0x8e0000fe, 0xdf0000ff, + }, +} + +// CodePage1140 is the IBM Code Page 1140 encoding. +var CodePage1140 *Charmap = &codePage1140 + +var codePage1140 = Charmap{ + name: "IBM Code Page 1140", + mib: identifier.IBM01140, + asciiSuperset: false, + low: 0x00, + replacement: 0x3f, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x9c, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x86, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x97, 0x00}}, {2, [3]byte{0xc2, 0x8d, 0x00}}, + {2, [3]byte{0xc2, 0x8e, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x9d, 0x00}}, {2, [3]byte{0xc2, 0x85, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {2, [3]byte{0xc2, 0x87, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x92, 0x00}}, {2, [3]byte{0xc2, 0x8f, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x80, 0x00}}, {2, [3]byte{0xc2, 0x81, 0x00}}, + {2, [3]byte{0xc2, 0x82, 0x00}}, {2, [3]byte{0xc2, 0x83, 0x00}}, + {2, [3]byte{0xc2, 0x84, 0x00}}, {1, [3]byte{0x0a, 0x00, 0x00}}, + {1, [3]byte{0x17, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x88, 0x00}}, {2, [3]byte{0xc2, 0x89, 0x00}}, + {2, [3]byte{0xc2, 0x8a, 0x00}}, {2, [3]byte{0xc2, 0x8b, 0x00}}, + {2, [3]byte{0xc2, 0x8c, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x90, 0x00}}, {2, [3]byte{0xc2, 0x91, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {2, [3]byte{0xc2, 0x93, 0x00}}, + {2, [3]byte{0xc2, 0x94, 0x00}}, {2, [3]byte{0xc2, 0x95, 0x00}}, + {2, [3]byte{0xc2, 0x96, 0x00}}, {1, [3]byte{0x04, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x98, 0x00}}, {2, [3]byte{0xc2, 0x99, 0x00}}, + {2, [3]byte{0xc2, 0x9a, 0x00}}, {2, [3]byte{0xc2, 0x9b, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x9e, 0x00}}, {1, [3]byte{0x1a, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {2, [3]byte{0xc2, 0xa0, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xc3, 0xa4, 0x00}}, + {2, [3]byte{0xc3, 0xa0, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa3, 0x00}}, {2, [3]byte{0xc3, 0xa5, 0x00}}, + {2, [3]byte{0xc3, 0xa7, 0x00}}, {2, [3]byte{0xc3, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xa2, 0x00}}, {1, [3]byte{0x2e, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x28, 0x00, 0x00}}, + {1, [3]byte{0x2b, 0x00, 0x00}}, {1, [3]byte{0x7c, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0xac, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {1, [3]byte{0x21, 0x00, 0x00}}, {1, [3]byte{0x24, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x3b, 0x00, 0x00}}, {2, [3]byte{0xc2, 0xac, 0x00}}, + {1, [3]byte{0x2d, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc3, 0x84, 0x00}}, + {2, [3]byte{0xc3, 0x80, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x83, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x87, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {1, [3]byte{0x2c, 0x00, 0x00}}, + {1, [3]byte{0x25, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0xb8, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc3, 0x88, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc3, 0x8f, 0x00}}, + {2, [3]byte{0xc3, 0x8c, 0x00}}, {1, [3]byte{0x60, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x3d, 0x00, 0x00}}, {1, [3]byte{0x22, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0x98, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xab, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xb0, 0x00}}, {2, [3]byte{0xc3, 0xbd, 0x00}}, + {2, [3]byte{0xc3, 0xbe, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {1, [3]byte{0x6a, 0x00, 0x00}}, + {1, [3]byte{0x6b, 0x00, 0x00}}, {1, [3]byte{0x6c, 0x00, 0x00}}, + {1, [3]byte{0x6d, 0x00, 0x00}}, {1, [3]byte{0x6e, 0x00, 0x00}}, + {1, [3]byte{0x6f, 0x00, 0x00}}, {1, [3]byte{0x70, 0x00, 0x00}}, + {1, [3]byte{0x71, 0x00, 0x00}}, {1, [3]byte{0x72, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xba, 0x00}}, + {2, [3]byte{0xc3, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xb8, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {3, [3]byte{0xe2, 0x82, 0xac}}, + {2, [3]byte{0xc2, 0xb5, 0x00}}, {1, [3]byte{0x7e, 0x00, 0x00}}, + {1, [3]byte{0x73, 0x00, 0x00}}, {1, [3]byte{0x74, 0x00, 0x00}}, + {1, [3]byte{0x75, 0x00, 0x00}}, {1, [3]byte{0x76, 0x00, 0x00}}, + {1, [3]byte{0x77, 0x00, 0x00}}, {1, [3]byte{0x78, 0x00, 0x00}}, + {1, [3]byte{0x79, 0x00, 0x00}}, {1, [3]byte{0x7a, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xa1, 0x00}}, {2, [3]byte{0xc2, 0xbf, 0x00}}, + {2, [3]byte{0xc3, 0x90, 0x00}}, {2, [3]byte{0xc3, 0x9d, 0x00}}, + {2, [3]byte{0xc3, 0x9e, 0x00}}, {2, [3]byte{0xc2, 0xae, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa5, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc2, 0xa9, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xbc, 0x00}}, + {2, [3]byte{0xc2, 0xbd, 0x00}}, {2, [3]byte{0xc2, 0xbe, 0x00}}, + {1, [3]byte{0x5b, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xaf, 0x00}}, {2, [3]byte{0xc2, 0xa8, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {1, [3]byte{0x7b, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xad, 0x00}}, {2, [3]byte{0xc3, 0xb4, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb2, 0x00}}, + {2, [3]byte{0xc3, 0xb3, 0x00}}, {2, [3]byte{0xc3, 0xb5, 0x00}}, + {1, [3]byte{0x7d, 0x00, 0x00}}, {1, [3]byte{0x4a, 0x00, 0x00}}, + {1, [3]byte{0x4b, 0x00, 0x00}}, {1, [3]byte{0x4c, 0x00, 0x00}}, + {1, [3]byte{0x4d, 0x00, 0x00}}, {1, [3]byte{0x4e, 0x00, 0x00}}, + {1, [3]byte{0x4f, 0x00, 0x00}}, {1, [3]byte{0x50, 0x00, 0x00}}, + {1, [3]byte{0x51, 0x00, 0x00}}, {1, [3]byte{0x52, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xb9, 0x00}}, {2, [3]byte{0xc3, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xbf, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {1, [3]byte{0x53, 0x00, 0x00}}, {1, [3]byte{0x54, 0x00, 0x00}}, + {1, [3]byte{0x55, 0x00, 0x00}}, {1, [3]byte{0x56, 0x00, 0x00}}, + {1, [3]byte{0x57, 0x00, 0x00}}, {1, [3]byte{0x58, 0x00, 0x00}}, + {1, [3]byte{0x59, 0x00, 0x00}}, {1, [3]byte{0x5a, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc3, 0x94, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x92, 0x00}}, + {2, [3]byte{0xc3, 0x93, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0xb3, 0x00}}, {2, [3]byte{0xc3, 0x9b, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc2, 0x9f, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x37000004, 0x2d000005, 0x2e000006, 0x2f000007, + 0x16000008, 0x05000009, 0x2500000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x3c000014, 0x3d000015, 0x32000016, 0x26000017, + 0x18000018, 0x19000019, 0x3f00001a, 0x2700001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x40000020, 0x5a000021, 0x7f000022, 0x7b000023, 0x5b000024, 0x6c000025, 0x50000026, 0x7d000027, + 0x4d000028, 0x5d000029, 0x5c00002a, 0x4e00002b, 0x6b00002c, 0x6000002d, 0x4b00002e, 0x6100002f, + 0xf0000030, 0xf1000031, 0xf2000032, 0xf3000033, 0xf4000034, 0xf5000035, 0xf6000036, 0xf7000037, + 0xf8000038, 0xf9000039, 0x7a00003a, 0x5e00003b, 0x4c00003c, 0x7e00003d, 0x6e00003e, 0x6f00003f, + 0x7c000040, 0xc1000041, 0xc2000042, 0xc3000043, 0xc4000044, 0xc5000045, 0xc6000046, 0xc7000047, + 0xc8000048, 0xc9000049, 0xd100004a, 0xd200004b, 0xd300004c, 0xd400004d, 0xd500004e, 0xd600004f, + 0xd7000050, 0xd8000051, 0xd9000052, 0xe2000053, 0xe3000054, 0xe4000055, 0xe5000056, 0xe6000057, + 0xe7000058, 0xe8000059, 0xe900005a, 0xba00005b, 0xe000005c, 0xbb00005d, 0xb000005e, 0x6d00005f, + 0x79000060, 0x81000061, 0x82000062, 0x83000063, 0x84000064, 0x85000065, 0x86000066, 0x87000067, + 0x88000068, 0x89000069, 0x9100006a, 0x9200006b, 0x9300006c, 0x9400006d, 0x9500006e, 0x9600006f, + 0x97000070, 0x98000071, 0x99000072, 0xa2000073, 0xa3000074, 0xa4000075, 0xa5000076, 0xa6000077, + 0xa7000078, 0xa8000079, 0xa900007a, 0xc000007b, 0x4f00007c, 0xd000007d, 0xa100007e, 0x0700007f, + 0x20000080, 0x21000081, 0x22000082, 0x23000083, 0x24000084, 0x15000085, 0x06000086, 0x17000087, + 0x28000088, 0x29000089, 0x2a00008a, 0x2b00008b, 0x2c00008c, 0x0900008d, 0x0a00008e, 0x1b00008f, + 0x30000090, 0x31000091, 0x1a000092, 0x33000093, 0x34000094, 0x35000095, 0x36000096, 0x08000097, + 0x38000098, 0x39000099, 0x3a00009a, 0x3b00009b, 0x0400009c, 0x1400009d, 0x3e00009e, 0xff00009f, + 0x410000a0, 0xaa0000a1, 0x4a0000a2, 0xb10000a3, 0xb20000a5, 0x6a0000a6, 0xb50000a7, 0xbd0000a8, + 0xb40000a9, 0x9a0000aa, 0x8a0000ab, 0x5f0000ac, 0xca0000ad, 0xaf0000ae, 0xbc0000af, 0x900000b0, + 0x8f0000b1, 0xea0000b2, 0xfa0000b3, 0xbe0000b4, 0xa00000b5, 0xb60000b6, 0xb30000b7, 0x9d0000b8, + 0xda0000b9, 0x9b0000ba, 0x8b0000bb, 0xb70000bc, 0xb80000bd, 0xb90000be, 0xab0000bf, 0x640000c0, + 0x650000c1, 0x620000c2, 0x660000c3, 0x630000c4, 0x670000c5, 0x9e0000c6, 0x680000c7, 0x740000c8, + 0x710000c9, 0x720000ca, 0x730000cb, 0x780000cc, 0x750000cd, 0x760000ce, 0x770000cf, 0xac0000d0, + 0x690000d1, 0xed0000d2, 0xee0000d3, 0xeb0000d4, 0xef0000d5, 0xec0000d6, 0xbf0000d7, 0x800000d8, + 0xfd0000d9, 0xfe0000da, 0xfb0000db, 0xfc0000dc, 0xad0000dd, 0xae0000de, 0x590000df, 0x440000e0, + 0x450000e1, 0x420000e2, 0x460000e3, 0x430000e4, 0x470000e5, 0x9c0000e6, 0x480000e7, 0x540000e8, + 0x510000e9, 0x520000ea, 0x530000eb, 0x580000ec, 0x550000ed, 0x560000ee, 0x570000ef, 0x8c0000f0, + 0x490000f1, 0xcd0000f2, 0xce0000f3, 0xcb0000f4, 0xcf0000f5, 0xcc0000f6, 0xe10000f7, 0x700000f8, + 0xdd0000f9, 0xde0000fa, 0xdb0000fb, 0xdc0000fc, 0x8d0000fd, 0x8e0000fe, 0xdf0000ff, 0x9f0020ac, + }, +} + +// ISO8859_1 is the ISO 8859-1 encoding. +var ISO8859_1 *Charmap = &iso8859_1 + +var iso8859_1 = Charmap{ + name: "ISO 8859-1", + mib: identifier.ISOLatin1, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x80, 0x00}}, {2, [3]byte{0xc2, 0x81, 0x00}}, + {2, [3]byte{0xc2, 0x82, 0x00}}, {2, [3]byte{0xc2, 0x83, 0x00}}, + {2, [3]byte{0xc2, 0x84, 0x00}}, {2, [3]byte{0xc2, 0x85, 0x00}}, + {2, [3]byte{0xc2, 0x86, 0x00}}, {2, [3]byte{0xc2, 0x87, 0x00}}, + {2, [3]byte{0xc2, 0x88, 0x00}}, {2, [3]byte{0xc2, 0x89, 0x00}}, + {2, [3]byte{0xc2, 0x8a, 0x00}}, {2, [3]byte{0xc2, 0x8b, 0x00}}, + {2, [3]byte{0xc2, 0x8c, 0x00}}, {2, [3]byte{0xc2, 0x8d, 0x00}}, + {2, [3]byte{0xc2, 0x8e, 0x00}}, {2, [3]byte{0xc2, 0x8f, 0x00}}, + {2, [3]byte{0xc2, 0x90, 0x00}}, {2, [3]byte{0xc2, 0x91, 0x00}}, + {2, [3]byte{0xc2, 0x92, 0x00}}, {2, [3]byte{0xc2, 0x93, 0x00}}, + {2, [3]byte{0xc2, 0x94, 0x00}}, {2, [3]byte{0xc2, 0x95, 0x00}}, + {2, [3]byte{0xc2, 0x96, 0x00}}, {2, [3]byte{0xc2, 0x97, 0x00}}, + {2, [3]byte{0xc2, 0x98, 0x00}}, {2, [3]byte{0xc2, 0x99, 0x00}}, + {2, [3]byte{0xc2, 0x9a, 0x00}}, {2, [3]byte{0xc2, 0x9b, 0x00}}, + {2, [3]byte{0xc2, 0x9c, 0x00}}, {2, [3]byte{0xc2, 0x9d, 0x00}}, + {2, [3]byte{0xc2, 0x9e, 0x00}}, {2, [3]byte{0xc2, 0x9f, 0x00}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xc2, 0xa1, 0x00}}, + {2, [3]byte{0xc2, 0xa2, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {2, [3]byte{0xc2, 0xa5, 0x00}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xc2, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xc2, 0xaf, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc2, 0xb3, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc2, 0xb8, 0x00}}, {2, [3]byte{0xc2, 0xb9, 0x00}}, + {2, [3]byte{0xc2, 0xba, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbe, 0x00}}, {2, [3]byte{0xc2, 0xbf, 0x00}}, + {2, [3]byte{0xc3, 0x80, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc3, 0x83, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc3, 0x87, 0x00}}, + {2, [3]byte{0xc3, 0x88, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc3, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc3, 0x8f, 0x00}}, + {2, [3]byte{0xc3, 0x90, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc3, 0x92, 0x00}}, {2, [3]byte{0xc3, 0x93, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {2, [3]byte{0xc3, 0x98, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0x9b, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0x9d, 0x00}}, + {2, [3]byte{0xc3, 0x9e, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc3, 0xa0, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xc3, 0xa3, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa5, 0x00}}, + {2, [3]byte{0xc3, 0xa6, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xac, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0xb0, 0x00}}, {2, [3]byte{0xc3, 0xb1, 0x00}}, + {2, [3]byte{0xc3, 0xb2, 0x00}}, {2, [3]byte{0xc3, 0xb3, 0x00}}, + {2, [3]byte{0xc3, 0xb4, 0x00}}, {2, [3]byte{0xc3, 0xb5, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {2, [3]byte{0xc3, 0xb8, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc3, 0xbd, 0x00}}, + {2, [3]byte{0xc3, 0xbe, 0x00}}, {2, [3]byte{0xc3, 0xbf, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0x80000080, 0x81000081, 0x82000082, 0x83000083, 0x84000084, 0x85000085, 0x86000086, 0x87000087, + 0x88000088, 0x89000089, 0x8a00008a, 0x8b00008b, 0x8c00008c, 0x8d00008d, 0x8e00008e, 0x8f00008f, + 0x90000090, 0x91000091, 0x92000092, 0x93000093, 0x94000094, 0x95000095, 0x96000096, 0x97000097, + 0x98000098, 0x99000099, 0x9a00009a, 0x9b00009b, 0x9c00009c, 0x9d00009d, 0x9e00009e, 0x9f00009f, + 0xa00000a0, 0xa10000a1, 0xa20000a2, 0xa30000a3, 0xa40000a4, 0xa50000a5, 0xa60000a6, 0xa70000a7, + 0xa80000a8, 0xa90000a9, 0xaa0000aa, 0xab0000ab, 0xac0000ac, 0xad0000ad, 0xae0000ae, 0xaf0000af, + 0xb00000b0, 0xb10000b1, 0xb20000b2, 0xb30000b3, 0xb40000b4, 0xb50000b5, 0xb60000b6, 0xb70000b7, + 0xb80000b8, 0xb90000b9, 0xba0000ba, 0xbb0000bb, 0xbc0000bc, 0xbd0000bd, 0xbe0000be, 0xbf0000bf, + 0xc00000c0, 0xc10000c1, 0xc20000c2, 0xc30000c3, 0xc40000c4, 0xc50000c5, 0xc60000c6, 0xc70000c7, + 0xc80000c8, 0xc90000c9, 0xca0000ca, 0xcb0000cb, 0xcc0000cc, 0xcd0000cd, 0xce0000ce, 0xcf0000cf, + 0xd00000d0, 0xd10000d1, 0xd20000d2, 0xd30000d3, 0xd40000d4, 0xd50000d5, 0xd60000d6, 0xd70000d7, + 0xd80000d8, 0xd90000d9, 0xda0000da, 0xdb0000db, 0xdc0000dc, 0xdd0000dd, 0xde0000de, 0xdf0000df, + 0xe00000e0, 0xe10000e1, 0xe20000e2, 0xe30000e3, 0xe40000e4, 0xe50000e5, 0xe60000e6, 0xe70000e7, + 0xe80000e8, 0xe90000e9, 0xea0000ea, 0xeb0000eb, 0xec0000ec, 0xed0000ed, 0xee0000ee, 0xef0000ef, + 0xf00000f0, 0xf10000f1, 0xf20000f2, 0xf30000f3, 0xf40000f4, 0xf50000f5, 0xf60000f6, 0xf70000f7, + 0xf80000f8, 0xf90000f9, 0xfa0000fa, 0xfb0000fb, 0xfc0000fc, 0xfd0000fd, 0xfe0000fe, 0xff0000ff, + }, +} + +// ISO8859_2 is the ISO 8859-2 encoding. +var ISO8859_2 *Charmap = &iso8859_2 + +var iso8859_2 = Charmap{ + name: "ISO 8859-2", + mib: identifier.ISOLatin2, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xc4, 0x84, 0x00}}, + {2, [3]byte{0xcb, 0x98, 0x00}}, {2, [3]byte{0xc5, 0x81, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {2, [3]byte{0xc4, 0xbd, 0x00}}, + {2, [3]byte{0xc5, 0x9a, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {2, [3]byte{0xc5, 0xa0, 0x00}}, + {2, [3]byte{0xc5, 0x9e, 0x00}}, {2, [3]byte{0xc5, 0xa4, 0x00}}, + {2, [3]byte{0xc5, 0xb9, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc5, 0xbd, 0x00}}, {2, [3]byte{0xc5, 0xbb, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc4, 0x85, 0x00}}, + {2, [3]byte{0xcb, 0x9b, 0x00}}, {2, [3]byte{0xc5, 0x82, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc4, 0xbe, 0x00}}, + {2, [3]byte{0xc5, 0x9b, 0x00}}, {2, [3]byte{0xcb, 0x87, 0x00}}, + {2, [3]byte{0xc2, 0xb8, 0x00}}, {2, [3]byte{0xc5, 0xa1, 0x00}}, + {2, [3]byte{0xc5, 0x9f, 0x00}}, {2, [3]byte{0xc5, 0xa5, 0x00}}, + {2, [3]byte{0xc5, 0xba, 0x00}}, {2, [3]byte{0xcb, 0x9d, 0x00}}, + {2, [3]byte{0xc5, 0xbe, 0x00}}, {2, [3]byte{0xc5, 0xbc, 0x00}}, + {2, [3]byte{0xc5, 0x94, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc4, 0x82, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc4, 0xb9, 0x00}}, + {2, [3]byte{0xc4, 0x86, 0x00}}, {2, [3]byte{0xc3, 0x87, 0x00}}, + {2, [3]byte{0xc4, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc4, 0x98, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc4, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc4, 0x8e, 0x00}}, + {2, [3]byte{0xc4, 0x90, 0x00}}, {2, [3]byte{0xc5, 0x83, 0x00}}, + {2, [3]byte{0xc5, 0x87, 0x00}}, {2, [3]byte{0xc3, 0x93, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc5, 0x90, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {2, [3]byte{0xc5, 0x98, 0x00}}, {2, [3]byte{0xc5, 0xae, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc5, 0xb0, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0x9d, 0x00}}, + {2, [3]byte{0xc5, 0xa2, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc5, 0x95, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xc4, 0x83, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc4, 0xba, 0x00}}, + {2, [3]byte{0xc4, 0x87, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc4, 0x8d, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc4, 0x99, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc4, 0x9b, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc4, 0x8f, 0x00}}, + {2, [3]byte{0xc4, 0x91, 0x00}}, {2, [3]byte{0xc5, 0x84, 0x00}}, + {2, [3]byte{0xc5, 0x88, 0x00}}, {2, [3]byte{0xc3, 0xb3, 0x00}}, + {2, [3]byte{0xc3, 0xb4, 0x00}}, {2, [3]byte{0xc5, 0x91, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {2, [3]byte{0xc5, 0x99, 0x00}}, {2, [3]byte{0xc5, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc5, 0xb1, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc3, 0xbd, 0x00}}, + {2, [3]byte{0xc5, 0xa3, 0x00}}, {2, [3]byte{0xcb, 0x99, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa40000a4, 0xa70000a7, 0xa80000a8, 0xad0000ad, 0xb00000b0, 0xb40000b4, 0xb80000b8, + 0xc10000c1, 0xc20000c2, 0xc40000c4, 0xc70000c7, 0xc90000c9, 0xcb0000cb, 0xcd0000cd, 0xce0000ce, + 0xd30000d3, 0xd40000d4, 0xd60000d6, 0xd70000d7, 0xda0000da, 0xdc0000dc, 0xdd0000dd, 0xdf0000df, + 0xe10000e1, 0xe20000e2, 0xe40000e4, 0xe70000e7, 0xe90000e9, 0xeb0000eb, 0xed0000ed, 0xee0000ee, + 0xf30000f3, 0xf40000f4, 0xf60000f6, 0xf70000f7, 0xfa0000fa, 0xfc0000fc, 0xfd0000fd, 0xc3000102, + 0xe3000103, 0xa1000104, 0xb1000105, 0xc6000106, 0xe6000107, 0xc800010c, 0xe800010d, 0xcf00010e, + 0xef00010f, 0xd0000110, 0xf0000111, 0xca000118, 0xea000119, 0xcc00011a, 0xec00011b, 0xc5000139, + 0xe500013a, 0xa500013d, 0xb500013e, 0xa3000141, 0xb3000142, 0xd1000143, 0xf1000144, 0xd2000147, + 0xf2000148, 0xd5000150, 0xf5000151, 0xc0000154, 0xe0000155, 0xd8000158, 0xf8000159, 0xa600015a, + 0xb600015b, 0xaa00015e, 0xba00015f, 0xa9000160, 0xb9000161, 0xde000162, 0xfe000163, 0xab000164, + 0xbb000165, 0xd900016e, 0xf900016f, 0xdb000170, 0xfb000171, 0xac000179, 0xbc00017a, 0xaf00017b, + 0xbf00017c, 0xae00017d, 0xbe00017e, 0xb70002c7, 0xa20002d8, 0xff0002d9, 0xb20002db, 0xbd0002dd, + 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, + 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, + 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, + 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, 0xbd0002dd, + }, +} + +// ISO8859_3 is the ISO 8859-3 encoding. +var ISO8859_3 *Charmap = &iso8859_3 + +var iso8859_3 = Charmap{ + name: "ISO 8859-3", + mib: identifier.ISOLatin3, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xc4, 0xa6, 0x00}}, + {2, [3]byte{0xcb, 0x98, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc4, 0xa4, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {2, [3]byte{0xc4, 0xb0, 0x00}}, + {2, [3]byte{0xc5, 0x9e, 0x00}}, {2, [3]byte{0xc4, 0x9e, 0x00}}, + {2, [3]byte{0xc4, 0xb4, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {2, [3]byte{0xc5, 0xbb, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc4, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc2, 0xb3, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xc4, 0xa5, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc2, 0xb8, 0x00}}, {2, [3]byte{0xc4, 0xb1, 0x00}}, + {2, [3]byte{0xc5, 0x9f, 0x00}}, {2, [3]byte{0xc4, 0x9f, 0x00}}, + {2, [3]byte{0xc4, 0xb5, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {2, [3]byte{0xc5, 0xbc, 0x00}}, + {2, [3]byte{0xc3, 0x80, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc4, 0x8a, 0x00}}, + {2, [3]byte{0xc4, 0x88, 0x00}}, {2, [3]byte{0xc3, 0x87, 0x00}}, + {2, [3]byte{0xc3, 0x88, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc3, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc3, 0x8f, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc3, 0x92, 0x00}}, {2, [3]byte{0xc3, 0x93, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc4, 0xa0, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {2, [3]byte{0xc4, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0x9b, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc5, 0xac, 0x00}}, + {2, [3]byte{0xc5, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc3, 0xa0, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc4, 0x8b, 0x00}}, + {2, [3]byte{0xc4, 0x89, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xac, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {2, [3]byte{0xc3, 0xb1, 0x00}}, + {2, [3]byte{0xc3, 0xb2, 0x00}}, {2, [3]byte{0xc3, 0xb3, 0x00}}, + {2, [3]byte{0xc3, 0xb4, 0x00}}, {2, [3]byte{0xc4, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {2, [3]byte{0xc4, 0x9d, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc5, 0xad, 0x00}}, + {2, [3]byte{0xc5, 0x9d, 0x00}}, {2, [3]byte{0xcb, 0x99, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa30000a3, 0xa40000a4, 0xa70000a7, 0xa80000a8, 0xad0000ad, 0xb00000b0, 0xb20000b2, + 0xb30000b3, 0xb40000b4, 0xb50000b5, 0xb70000b7, 0xb80000b8, 0xbd0000bd, 0xc00000c0, 0xc10000c1, + 0xc20000c2, 0xc40000c4, 0xc70000c7, 0xc80000c8, 0xc90000c9, 0xca0000ca, 0xcb0000cb, 0xcc0000cc, + 0xcd0000cd, 0xce0000ce, 0xcf0000cf, 0xd10000d1, 0xd20000d2, 0xd30000d3, 0xd40000d4, 0xd60000d6, + 0xd70000d7, 0xd90000d9, 0xda0000da, 0xdb0000db, 0xdc0000dc, 0xdf0000df, 0xe00000e0, 0xe10000e1, + 0xe20000e2, 0xe40000e4, 0xe70000e7, 0xe80000e8, 0xe90000e9, 0xea0000ea, 0xeb0000eb, 0xec0000ec, + 0xed0000ed, 0xee0000ee, 0xef0000ef, 0xf10000f1, 0xf20000f2, 0xf30000f3, 0xf40000f4, 0xf60000f6, + 0xf70000f7, 0xf90000f9, 0xfa0000fa, 0xfb0000fb, 0xfc0000fc, 0xc6000108, 0xe6000109, 0xc500010a, + 0xe500010b, 0xd800011c, 0xf800011d, 0xab00011e, 0xbb00011f, 0xd5000120, 0xf5000121, 0xa6000124, + 0xb6000125, 0xa1000126, 0xb1000127, 0xa9000130, 0xb9000131, 0xac000134, 0xbc000135, 0xde00015c, + 0xfe00015d, 0xaa00015e, 0xba00015f, 0xdd00016c, 0xfd00016d, 0xaf00017b, 0xbf00017c, 0xa20002d8, + 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, + 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, + 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, + 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, + 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, 0xff0002d9, + }, +} + +// ISO8859_4 is the ISO 8859-4 encoding. +var ISO8859_4 *Charmap = &iso8859_4 + +var iso8859_4 = Charmap{ + name: "ISO 8859-4", + mib: identifier.ISOLatin4, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xc4, 0x84, 0x00}}, + {2, [3]byte{0xc4, 0xb8, 0x00}}, {2, [3]byte{0xc5, 0x96, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {2, [3]byte{0xc4, 0xa8, 0x00}}, + {2, [3]byte{0xc4, 0xbb, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {2, [3]byte{0xc5, 0xa0, 0x00}}, + {2, [3]byte{0xc4, 0x92, 0x00}}, {2, [3]byte{0xc4, 0xa2, 0x00}}, + {2, [3]byte{0xc5, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc5, 0xbd, 0x00}}, {2, [3]byte{0xc2, 0xaf, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc4, 0x85, 0x00}}, + {2, [3]byte{0xcb, 0x9b, 0x00}}, {2, [3]byte{0xc5, 0x97, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc4, 0xa9, 0x00}}, + {2, [3]byte{0xc4, 0xbc, 0x00}}, {2, [3]byte{0xcb, 0x87, 0x00}}, + {2, [3]byte{0xc2, 0xb8, 0x00}}, {2, [3]byte{0xc5, 0xa1, 0x00}}, + {2, [3]byte{0xc4, 0x93, 0x00}}, {2, [3]byte{0xc4, 0xa3, 0x00}}, + {2, [3]byte{0xc5, 0xa7, 0x00}}, {2, [3]byte{0xc5, 0x8a, 0x00}}, + {2, [3]byte{0xc5, 0xbe, 0x00}}, {2, [3]byte{0xc5, 0x8b, 0x00}}, + {2, [3]byte{0xc4, 0x80, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc3, 0x83, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc4, 0xae, 0x00}}, + {2, [3]byte{0xc4, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc4, 0x98, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc4, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc4, 0xaa, 0x00}}, + {2, [3]byte{0xc4, 0x90, 0x00}}, {2, [3]byte{0xc5, 0x85, 0x00}}, + {2, [3]byte{0xc5, 0x8c, 0x00}}, {2, [3]byte{0xc4, 0xb6, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {2, [3]byte{0xc3, 0x98, 0x00}}, {2, [3]byte{0xc5, 0xb2, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0x9b, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc5, 0xa8, 0x00}}, + {2, [3]byte{0xc5, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc4, 0x81, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xc3, 0xa3, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa5, 0x00}}, + {2, [3]byte{0xc3, 0xa6, 0x00}}, {2, [3]byte{0xc4, 0xaf, 0x00}}, + {2, [3]byte{0xc4, 0x8d, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc4, 0x99, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc4, 0x97, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc4, 0xab, 0x00}}, + {2, [3]byte{0xc4, 0x91, 0x00}}, {2, [3]byte{0xc5, 0x86, 0x00}}, + {2, [3]byte{0xc5, 0x8d, 0x00}}, {2, [3]byte{0xc4, 0xb7, 0x00}}, + {2, [3]byte{0xc3, 0xb4, 0x00}}, {2, [3]byte{0xc3, 0xb5, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {2, [3]byte{0xc3, 0xb8, 0x00}}, {2, [3]byte{0xc5, 0xb3, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc5, 0xa9, 0x00}}, + {2, [3]byte{0xc5, 0xab, 0x00}}, {2, [3]byte{0xcb, 0x99, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa40000a4, 0xa70000a7, 0xa80000a8, 0xad0000ad, 0xaf0000af, 0xb00000b0, 0xb40000b4, + 0xb80000b8, 0xc10000c1, 0xc20000c2, 0xc30000c3, 0xc40000c4, 0xc50000c5, 0xc60000c6, 0xc90000c9, + 0xcb0000cb, 0xcd0000cd, 0xce0000ce, 0xd40000d4, 0xd50000d5, 0xd60000d6, 0xd70000d7, 0xd80000d8, + 0xda0000da, 0xdb0000db, 0xdc0000dc, 0xdf0000df, 0xe10000e1, 0xe20000e2, 0xe30000e3, 0xe40000e4, + 0xe50000e5, 0xe60000e6, 0xe90000e9, 0xeb0000eb, 0xed0000ed, 0xee0000ee, 0xf40000f4, 0xf50000f5, + 0xf60000f6, 0xf70000f7, 0xf80000f8, 0xfa0000fa, 0xfb0000fb, 0xfc0000fc, 0xc0000100, 0xe0000101, + 0xa1000104, 0xb1000105, 0xc800010c, 0xe800010d, 0xd0000110, 0xf0000111, 0xaa000112, 0xba000113, + 0xcc000116, 0xec000117, 0xca000118, 0xea000119, 0xab000122, 0xbb000123, 0xa5000128, 0xb5000129, + 0xcf00012a, 0xef00012b, 0xc700012e, 0xe700012f, 0xd3000136, 0xf3000137, 0xa2000138, 0xa600013b, + 0xb600013c, 0xd1000145, 0xf1000146, 0xbd00014a, 0xbf00014b, 0xd200014c, 0xf200014d, 0xa3000156, + 0xb3000157, 0xa9000160, 0xb9000161, 0xac000166, 0xbc000167, 0xdd000168, 0xfd000169, 0xde00016a, + 0xfe00016b, 0xd9000172, 0xf9000173, 0xae00017d, 0xbe00017e, 0xb70002c7, 0xff0002d9, 0xb20002db, + 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, + 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, + 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, + 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, 0xb20002db, + }, +} + +// ISO8859_5 is the ISO 8859-5 encoding. +var ISO8859_5 *Charmap = &iso8859_5 + +var iso8859_5 = Charmap{ + name: "ISO 8859-5", + mib: identifier.ISOLatinCyrillic, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xd0, 0x81, 0x00}}, + {2, [3]byte{0xd0, 0x82, 0x00}}, {2, [3]byte{0xd0, 0x83, 0x00}}, + {2, [3]byte{0xd0, 0x84, 0x00}}, {2, [3]byte{0xd0, 0x85, 0x00}}, + {2, [3]byte{0xd0, 0x86, 0x00}}, {2, [3]byte{0xd0, 0x87, 0x00}}, + {2, [3]byte{0xd0, 0x88, 0x00}}, {2, [3]byte{0xd0, 0x89, 0x00}}, + {2, [3]byte{0xd0, 0x8a, 0x00}}, {2, [3]byte{0xd0, 0x8b, 0x00}}, + {2, [3]byte{0xd0, 0x8c, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xd0, 0x8e, 0x00}}, {2, [3]byte{0xd0, 0x8f, 0x00}}, + {2, [3]byte{0xd0, 0x90, 0x00}}, {2, [3]byte{0xd0, 0x91, 0x00}}, + {2, [3]byte{0xd0, 0x92, 0x00}}, {2, [3]byte{0xd0, 0x93, 0x00}}, + {2, [3]byte{0xd0, 0x94, 0x00}}, {2, [3]byte{0xd0, 0x95, 0x00}}, + {2, [3]byte{0xd0, 0x96, 0x00}}, {2, [3]byte{0xd0, 0x97, 0x00}}, + {2, [3]byte{0xd0, 0x98, 0x00}}, {2, [3]byte{0xd0, 0x99, 0x00}}, + {2, [3]byte{0xd0, 0x9a, 0x00}}, {2, [3]byte{0xd0, 0x9b, 0x00}}, + {2, [3]byte{0xd0, 0x9c, 0x00}}, {2, [3]byte{0xd0, 0x9d, 0x00}}, + {2, [3]byte{0xd0, 0x9e, 0x00}}, {2, [3]byte{0xd0, 0x9f, 0x00}}, + {2, [3]byte{0xd0, 0xa0, 0x00}}, {2, [3]byte{0xd0, 0xa1, 0x00}}, + {2, [3]byte{0xd0, 0xa2, 0x00}}, {2, [3]byte{0xd0, 0xa3, 0x00}}, + {2, [3]byte{0xd0, 0xa4, 0x00}}, {2, [3]byte{0xd0, 0xa5, 0x00}}, + {2, [3]byte{0xd0, 0xa6, 0x00}}, {2, [3]byte{0xd0, 0xa7, 0x00}}, + {2, [3]byte{0xd0, 0xa8, 0x00}}, {2, [3]byte{0xd0, 0xa9, 0x00}}, + {2, [3]byte{0xd0, 0xaa, 0x00}}, {2, [3]byte{0xd0, 0xab, 0x00}}, + {2, [3]byte{0xd0, 0xac, 0x00}}, {2, [3]byte{0xd0, 0xad, 0x00}}, + {2, [3]byte{0xd0, 0xae, 0x00}}, {2, [3]byte{0xd0, 0xaf, 0x00}}, + {2, [3]byte{0xd0, 0xb0, 0x00}}, {2, [3]byte{0xd0, 0xb1, 0x00}}, + {2, [3]byte{0xd0, 0xb2, 0x00}}, {2, [3]byte{0xd0, 0xb3, 0x00}}, + {2, [3]byte{0xd0, 0xb4, 0x00}}, {2, [3]byte{0xd0, 0xb5, 0x00}}, + {2, [3]byte{0xd0, 0xb6, 0x00}}, {2, [3]byte{0xd0, 0xb7, 0x00}}, + {2, [3]byte{0xd0, 0xb8, 0x00}}, {2, [3]byte{0xd0, 0xb9, 0x00}}, + {2, [3]byte{0xd0, 0xba, 0x00}}, {2, [3]byte{0xd0, 0xbb, 0x00}}, + {2, [3]byte{0xd0, 0xbc, 0x00}}, {2, [3]byte{0xd0, 0xbd, 0x00}}, + {2, [3]byte{0xd0, 0xbe, 0x00}}, {2, [3]byte{0xd0, 0xbf, 0x00}}, + {2, [3]byte{0xd1, 0x80, 0x00}}, {2, [3]byte{0xd1, 0x81, 0x00}}, + {2, [3]byte{0xd1, 0x82, 0x00}}, {2, [3]byte{0xd1, 0x83, 0x00}}, + {2, [3]byte{0xd1, 0x84, 0x00}}, {2, [3]byte{0xd1, 0x85, 0x00}}, + {2, [3]byte{0xd1, 0x86, 0x00}}, {2, [3]byte{0xd1, 0x87, 0x00}}, + {2, [3]byte{0xd1, 0x88, 0x00}}, {2, [3]byte{0xd1, 0x89, 0x00}}, + {2, [3]byte{0xd1, 0x8a, 0x00}}, {2, [3]byte{0xd1, 0x8b, 0x00}}, + {2, [3]byte{0xd1, 0x8c, 0x00}}, {2, [3]byte{0xd1, 0x8d, 0x00}}, + {2, [3]byte{0xd1, 0x8e, 0x00}}, {2, [3]byte{0xd1, 0x8f, 0x00}}, + {3, [3]byte{0xe2, 0x84, 0x96}}, {2, [3]byte{0xd1, 0x91, 0x00}}, + {2, [3]byte{0xd1, 0x92, 0x00}}, {2, [3]byte{0xd1, 0x93, 0x00}}, + {2, [3]byte{0xd1, 0x94, 0x00}}, {2, [3]byte{0xd1, 0x95, 0x00}}, + {2, [3]byte{0xd1, 0x96, 0x00}}, {2, [3]byte{0xd1, 0x97, 0x00}}, + {2, [3]byte{0xd1, 0x98, 0x00}}, {2, [3]byte{0xd1, 0x99, 0x00}}, + {2, [3]byte{0xd1, 0x9a, 0x00}}, {2, [3]byte{0xd1, 0x9b, 0x00}}, + {2, [3]byte{0xd1, 0x9c, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xd1, 0x9e, 0x00}}, {2, [3]byte{0xd1, 0x9f, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xfd0000a7, 0xad0000ad, 0xa1000401, 0xa2000402, 0xa3000403, 0xa4000404, 0xa5000405, + 0xa6000406, 0xa7000407, 0xa8000408, 0xa9000409, 0xaa00040a, 0xab00040b, 0xac00040c, 0xae00040e, + 0xaf00040f, 0xb0000410, 0xb1000411, 0xb2000412, 0xb3000413, 0xb4000414, 0xb5000415, 0xb6000416, + 0xb7000417, 0xb8000418, 0xb9000419, 0xba00041a, 0xbb00041b, 0xbc00041c, 0xbd00041d, 0xbe00041e, + 0xbf00041f, 0xc0000420, 0xc1000421, 0xc2000422, 0xc3000423, 0xc4000424, 0xc5000425, 0xc6000426, + 0xc7000427, 0xc8000428, 0xc9000429, 0xca00042a, 0xcb00042b, 0xcc00042c, 0xcd00042d, 0xce00042e, + 0xcf00042f, 0xd0000430, 0xd1000431, 0xd2000432, 0xd3000433, 0xd4000434, 0xd5000435, 0xd6000436, + 0xd7000437, 0xd8000438, 0xd9000439, 0xda00043a, 0xdb00043b, 0xdc00043c, 0xdd00043d, 0xde00043e, + 0xdf00043f, 0xe0000440, 0xe1000441, 0xe2000442, 0xe3000443, 0xe4000444, 0xe5000445, 0xe6000446, + 0xe7000447, 0xe8000448, 0xe9000449, 0xea00044a, 0xeb00044b, 0xec00044c, 0xed00044d, 0xee00044e, + 0xef00044f, 0xf1000451, 0xf2000452, 0xf3000453, 0xf4000454, 0xf5000455, 0xf6000456, 0xf7000457, + 0xf8000458, 0xf9000459, 0xfa00045a, 0xfb00045b, 0xfc00045c, 0xfe00045e, 0xff00045f, 0xf0002116, + 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, + 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, + 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, + 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, 0xf0002116, + }, +} + +// ISO8859_6 is the ISO 8859-6 encoding. +var ISO8859_6 *Charmap = &iso8859_6 + +var iso8859_6 = Charmap{ + name: "ISO 8859-6", + mib: identifier.ISOLatinArabic, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xd8, 0x8c, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {2, [3]byte{0xd8, 0x9b, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {2, [3]byte{0xd8, 0x9f, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {2, [3]byte{0xd8, 0xa1, 0x00}}, + {2, [3]byte{0xd8, 0xa2, 0x00}}, {2, [3]byte{0xd8, 0xa3, 0x00}}, + {2, [3]byte{0xd8, 0xa4, 0x00}}, {2, [3]byte{0xd8, 0xa5, 0x00}}, + {2, [3]byte{0xd8, 0xa6, 0x00}}, {2, [3]byte{0xd8, 0xa7, 0x00}}, + {2, [3]byte{0xd8, 0xa8, 0x00}}, {2, [3]byte{0xd8, 0xa9, 0x00}}, + {2, [3]byte{0xd8, 0xaa, 0x00}}, {2, [3]byte{0xd8, 0xab, 0x00}}, + {2, [3]byte{0xd8, 0xac, 0x00}}, {2, [3]byte{0xd8, 0xad, 0x00}}, + {2, [3]byte{0xd8, 0xae, 0x00}}, {2, [3]byte{0xd8, 0xaf, 0x00}}, + {2, [3]byte{0xd8, 0xb0, 0x00}}, {2, [3]byte{0xd8, 0xb1, 0x00}}, + {2, [3]byte{0xd8, 0xb2, 0x00}}, {2, [3]byte{0xd8, 0xb3, 0x00}}, + {2, [3]byte{0xd8, 0xb4, 0x00}}, {2, [3]byte{0xd8, 0xb5, 0x00}}, + {2, [3]byte{0xd8, 0xb6, 0x00}}, {2, [3]byte{0xd8, 0xb7, 0x00}}, + {2, [3]byte{0xd8, 0xb8, 0x00}}, {2, [3]byte{0xd8, 0xb9, 0x00}}, + {2, [3]byte{0xd8, 0xba, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xd9, 0x80, 0x00}}, {2, [3]byte{0xd9, 0x81, 0x00}}, + {2, [3]byte{0xd9, 0x82, 0x00}}, {2, [3]byte{0xd9, 0x83, 0x00}}, + {2, [3]byte{0xd9, 0x84, 0x00}}, {2, [3]byte{0xd9, 0x85, 0x00}}, + {2, [3]byte{0xd9, 0x86, 0x00}}, {2, [3]byte{0xd9, 0x87, 0x00}}, + {2, [3]byte{0xd9, 0x88, 0x00}}, {2, [3]byte{0xd9, 0x89, 0x00}}, + {2, [3]byte{0xd9, 0x8a, 0x00}}, {2, [3]byte{0xd9, 0x8b, 0x00}}, + {2, [3]byte{0xd9, 0x8c, 0x00}}, {2, [3]byte{0xd9, 0x8d, 0x00}}, + {2, [3]byte{0xd9, 0x8e, 0x00}}, {2, [3]byte{0xd9, 0x8f, 0x00}}, + {2, [3]byte{0xd9, 0x90, 0x00}}, {2, [3]byte{0xd9, 0x91, 0x00}}, + {2, [3]byte{0xd9, 0x92, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa40000a4, 0xad0000ad, 0xac00060c, 0xbb00061b, 0xbf00061f, 0xc1000621, 0xc2000622, + 0xc3000623, 0xc4000624, 0xc5000625, 0xc6000626, 0xc7000627, 0xc8000628, 0xc9000629, 0xca00062a, + 0xcb00062b, 0xcc00062c, 0xcd00062d, 0xce00062e, 0xcf00062f, 0xd0000630, 0xd1000631, 0xd2000632, + 0xd3000633, 0xd4000634, 0xd5000635, 0xd6000636, 0xd7000637, 0xd8000638, 0xd9000639, 0xda00063a, + 0xe0000640, 0xe1000641, 0xe2000642, 0xe3000643, 0xe4000644, 0xe5000645, 0xe6000646, 0xe7000647, + 0xe8000648, 0xe9000649, 0xea00064a, 0xeb00064b, 0xec00064c, 0xed00064d, 0xee00064e, 0xef00064f, + 0xf0000650, 0xf1000651, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, + 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, + 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, + 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, + 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, + 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, + 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, + 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, + 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, + 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, 0xf2000652, + }, +} + +// ISO8859_7 is the ISO 8859-7 encoding. +var ISO8859_7 *Charmap = &iso8859_7 + +var iso8859_7 = Charmap{ + name: "ISO 8859-7", + mib: identifier.ISOLatinGreek, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {3, [3]byte{0xe2, 0x80, 0x98}}, + {3, [3]byte{0xe2, 0x80, 0x99}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xac}}, {3, [3]byte{0xe2, 0x82, 0xaf}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xcd, 0xba, 0x00}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0x95}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc2, 0xb3, 0x00}}, + {2, [3]byte{0xce, 0x84, 0x00}}, {2, [3]byte{0xce, 0x85, 0x00}}, + {2, [3]byte{0xce, 0x86, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xce, 0x88, 0x00}}, {2, [3]byte{0xce, 0x89, 0x00}}, + {2, [3]byte{0xce, 0x8a, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xce, 0x8c, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xce, 0x8e, 0x00}}, {2, [3]byte{0xce, 0x8f, 0x00}}, + {2, [3]byte{0xce, 0x90, 0x00}}, {2, [3]byte{0xce, 0x91, 0x00}}, + {2, [3]byte{0xce, 0x92, 0x00}}, {2, [3]byte{0xce, 0x93, 0x00}}, + {2, [3]byte{0xce, 0x94, 0x00}}, {2, [3]byte{0xce, 0x95, 0x00}}, + {2, [3]byte{0xce, 0x96, 0x00}}, {2, [3]byte{0xce, 0x97, 0x00}}, + {2, [3]byte{0xce, 0x98, 0x00}}, {2, [3]byte{0xce, 0x99, 0x00}}, + {2, [3]byte{0xce, 0x9a, 0x00}}, {2, [3]byte{0xce, 0x9b, 0x00}}, + {2, [3]byte{0xce, 0x9c, 0x00}}, {2, [3]byte{0xce, 0x9d, 0x00}}, + {2, [3]byte{0xce, 0x9e, 0x00}}, {2, [3]byte{0xce, 0x9f, 0x00}}, + {2, [3]byte{0xce, 0xa0, 0x00}}, {2, [3]byte{0xce, 0xa1, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {2, [3]byte{0xce, 0xa3, 0x00}}, + {2, [3]byte{0xce, 0xa4, 0x00}}, {2, [3]byte{0xce, 0xa5, 0x00}}, + {2, [3]byte{0xce, 0xa6, 0x00}}, {2, [3]byte{0xce, 0xa7, 0x00}}, + {2, [3]byte{0xce, 0xa8, 0x00}}, {2, [3]byte{0xce, 0xa9, 0x00}}, + {2, [3]byte{0xce, 0xaa, 0x00}}, {2, [3]byte{0xce, 0xab, 0x00}}, + {2, [3]byte{0xce, 0xac, 0x00}}, {2, [3]byte{0xce, 0xad, 0x00}}, + {2, [3]byte{0xce, 0xae, 0x00}}, {2, [3]byte{0xce, 0xaf, 0x00}}, + {2, [3]byte{0xce, 0xb0, 0x00}}, {2, [3]byte{0xce, 0xb1, 0x00}}, + {2, [3]byte{0xce, 0xb2, 0x00}}, {2, [3]byte{0xce, 0xb3, 0x00}}, + {2, [3]byte{0xce, 0xb4, 0x00}}, {2, [3]byte{0xce, 0xb5, 0x00}}, + {2, [3]byte{0xce, 0xb6, 0x00}}, {2, [3]byte{0xce, 0xb7, 0x00}}, + {2, [3]byte{0xce, 0xb8, 0x00}}, {2, [3]byte{0xce, 0xb9, 0x00}}, + {2, [3]byte{0xce, 0xba, 0x00}}, {2, [3]byte{0xce, 0xbb, 0x00}}, + {2, [3]byte{0xce, 0xbc, 0x00}}, {2, [3]byte{0xce, 0xbd, 0x00}}, + {2, [3]byte{0xce, 0xbe, 0x00}}, {2, [3]byte{0xce, 0xbf, 0x00}}, + {2, [3]byte{0xcf, 0x80, 0x00}}, {2, [3]byte{0xcf, 0x81, 0x00}}, + {2, [3]byte{0xcf, 0x82, 0x00}}, {2, [3]byte{0xcf, 0x83, 0x00}}, + {2, [3]byte{0xcf, 0x84, 0x00}}, {2, [3]byte{0xcf, 0x85, 0x00}}, + {2, [3]byte{0xcf, 0x86, 0x00}}, {2, [3]byte{0xcf, 0x87, 0x00}}, + {2, [3]byte{0xcf, 0x88, 0x00}}, {2, [3]byte{0xcf, 0x89, 0x00}}, + {2, [3]byte{0xcf, 0x8a, 0x00}}, {2, [3]byte{0xcf, 0x8b, 0x00}}, + {2, [3]byte{0xcf, 0x8c, 0x00}}, {2, [3]byte{0xcf, 0x8d, 0x00}}, + {2, [3]byte{0xcf, 0x8e, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa30000a3, 0xa60000a6, 0xa70000a7, 0xa80000a8, 0xa90000a9, 0xab0000ab, 0xac0000ac, + 0xad0000ad, 0xb00000b0, 0xb10000b1, 0xb20000b2, 0xb30000b3, 0xb70000b7, 0xbb0000bb, 0xbd0000bd, + 0xaa00037a, 0xb4000384, 0xb5000385, 0xb6000386, 0xb8000388, 0xb9000389, 0xba00038a, 0xbc00038c, + 0xbe00038e, 0xbf00038f, 0xc0000390, 0xc1000391, 0xc2000392, 0xc3000393, 0xc4000394, 0xc5000395, + 0xc6000396, 0xc7000397, 0xc8000398, 0xc9000399, 0xca00039a, 0xcb00039b, 0xcc00039c, 0xcd00039d, + 0xce00039e, 0xcf00039f, 0xd00003a0, 0xd10003a1, 0xd30003a3, 0xd40003a4, 0xd50003a5, 0xd60003a6, + 0xd70003a7, 0xd80003a8, 0xd90003a9, 0xda0003aa, 0xdb0003ab, 0xdc0003ac, 0xdd0003ad, 0xde0003ae, + 0xdf0003af, 0xe00003b0, 0xe10003b1, 0xe20003b2, 0xe30003b3, 0xe40003b4, 0xe50003b5, 0xe60003b6, + 0xe70003b7, 0xe80003b8, 0xe90003b9, 0xea0003ba, 0xeb0003bb, 0xec0003bc, 0xed0003bd, 0xee0003be, + 0xef0003bf, 0xf00003c0, 0xf10003c1, 0xf20003c2, 0xf30003c3, 0xf40003c4, 0xf50003c5, 0xf60003c6, + 0xf70003c7, 0xf80003c8, 0xf90003c9, 0xfa0003ca, 0xfb0003cb, 0xfc0003cc, 0xfd0003cd, 0xfe0003ce, + 0xaf002015, 0xa1002018, 0xa2002019, 0xa40020ac, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, + 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, + 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, + 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, + 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, 0xa50020af, + }, +} + +// ISO8859_8 is the ISO 8859-8 encoding. +var ISO8859_8 *Charmap = &iso8859_8 + +var iso8859_8 = Charmap{ + name: "ISO 8859-8", + mib: identifier.ISOLatinHebrew, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa2, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {2, [3]byte{0xc2, 0xa5, 0x00}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0x97, 0x00}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xc2, 0xaf, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc2, 0xb3, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc2, 0xb8, 0x00}}, {2, [3]byte{0xc2, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xb7, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbe, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0x97}}, + {2, [3]byte{0xd7, 0x90, 0x00}}, {2, [3]byte{0xd7, 0x91, 0x00}}, + {2, [3]byte{0xd7, 0x92, 0x00}}, {2, [3]byte{0xd7, 0x93, 0x00}}, + {2, [3]byte{0xd7, 0x94, 0x00}}, {2, [3]byte{0xd7, 0x95, 0x00}}, + {2, [3]byte{0xd7, 0x96, 0x00}}, {2, [3]byte{0xd7, 0x97, 0x00}}, + {2, [3]byte{0xd7, 0x98, 0x00}}, {2, [3]byte{0xd7, 0x99, 0x00}}, + {2, [3]byte{0xd7, 0x9a, 0x00}}, {2, [3]byte{0xd7, 0x9b, 0x00}}, + {2, [3]byte{0xd7, 0x9c, 0x00}}, {2, [3]byte{0xd7, 0x9d, 0x00}}, + {2, [3]byte{0xd7, 0x9e, 0x00}}, {2, [3]byte{0xd7, 0x9f, 0x00}}, + {2, [3]byte{0xd7, 0xa0, 0x00}}, {2, [3]byte{0xd7, 0xa1, 0x00}}, + {2, [3]byte{0xd7, 0xa2, 0x00}}, {2, [3]byte{0xd7, 0xa3, 0x00}}, + {2, [3]byte{0xd7, 0xa4, 0x00}}, {2, [3]byte{0xd7, 0xa5, 0x00}}, + {2, [3]byte{0xd7, 0xa6, 0x00}}, {2, [3]byte{0xd7, 0xa7, 0x00}}, + {2, [3]byte{0xd7, 0xa8, 0x00}}, {2, [3]byte{0xd7, 0xa9, 0x00}}, + {2, [3]byte{0xd7, 0xaa, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0x8e}}, + {3, [3]byte{0xe2, 0x80, 0x8f}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa20000a2, 0xa30000a3, 0xa40000a4, 0xa50000a5, 0xa60000a6, 0xa70000a7, 0xa80000a8, + 0xa90000a9, 0xab0000ab, 0xac0000ac, 0xad0000ad, 0xae0000ae, 0xaf0000af, 0xb00000b0, 0xb10000b1, + 0xb20000b2, 0xb30000b3, 0xb40000b4, 0xb50000b5, 0xb60000b6, 0xb70000b7, 0xb80000b8, 0xb90000b9, + 0xbb0000bb, 0xbc0000bc, 0xbd0000bd, 0xbe0000be, 0xaa0000d7, 0xba0000f7, 0xe00005d0, 0xe10005d1, + 0xe20005d2, 0xe30005d3, 0xe40005d4, 0xe50005d5, 0xe60005d6, 0xe70005d7, 0xe80005d8, 0xe90005d9, + 0xea0005da, 0xeb0005db, 0xec0005dc, 0xed0005dd, 0xee0005de, 0xef0005df, 0xf00005e0, 0xf10005e1, + 0xf20005e2, 0xf30005e3, 0xf40005e4, 0xf50005e5, 0xf60005e6, 0xf70005e7, 0xf80005e8, 0xf90005e9, + 0xfa0005ea, 0xfd00200e, 0xfe00200f, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, + 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, + 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, + 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, + 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, + 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, + 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, + 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, + 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, 0xdf002017, + }, +} + +// ISO8859_9 is the ISO 8859-9 encoding. +var ISO8859_9 *Charmap = &iso8859_9 + +var iso8859_9 = Charmap{ + name: "ISO 8859-9", + mib: identifier.ISOLatin5, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xc2, 0x80, 0x00}}, {2, [3]byte{0xc2, 0x81, 0x00}}, + {2, [3]byte{0xc2, 0x82, 0x00}}, {2, [3]byte{0xc2, 0x83, 0x00}}, + {2, [3]byte{0xc2, 0x84, 0x00}}, {2, [3]byte{0xc2, 0x85, 0x00}}, + {2, [3]byte{0xc2, 0x86, 0x00}}, {2, [3]byte{0xc2, 0x87, 0x00}}, + {2, [3]byte{0xc2, 0x88, 0x00}}, {2, [3]byte{0xc2, 0x89, 0x00}}, + {2, [3]byte{0xc2, 0x8a, 0x00}}, {2, [3]byte{0xc2, 0x8b, 0x00}}, + {2, [3]byte{0xc2, 0x8c, 0x00}}, {2, [3]byte{0xc2, 0x8d, 0x00}}, + {2, [3]byte{0xc2, 0x8e, 0x00}}, {2, [3]byte{0xc2, 0x8f, 0x00}}, + {2, [3]byte{0xc2, 0x90, 0x00}}, {2, [3]byte{0xc2, 0x91, 0x00}}, + {2, [3]byte{0xc2, 0x92, 0x00}}, {2, [3]byte{0xc2, 0x93, 0x00}}, + {2, [3]byte{0xc2, 0x94, 0x00}}, {2, [3]byte{0xc2, 0x95, 0x00}}, + {2, [3]byte{0xc2, 0x96, 0x00}}, {2, [3]byte{0xc2, 0x97, 0x00}}, + {2, [3]byte{0xc2, 0x98, 0x00}}, {2, [3]byte{0xc2, 0x99, 0x00}}, + {2, [3]byte{0xc2, 0x9a, 0x00}}, {2, [3]byte{0xc2, 0x9b, 0x00}}, + {2, [3]byte{0xc2, 0x9c, 0x00}}, {2, [3]byte{0xc2, 0x9d, 0x00}}, + {2, [3]byte{0xc2, 0x9e, 0x00}}, {2, [3]byte{0xc2, 0x9f, 0x00}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xc2, 0xa1, 0x00}}, + {2, [3]byte{0xc2, 0xa2, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {2, [3]byte{0xc2, 0xa5, 0x00}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xc2, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xc2, 0xaf, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc2, 0xb3, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc2, 0xb8, 0x00}}, {2, [3]byte{0xc2, 0xb9, 0x00}}, + {2, [3]byte{0xc2, 0xba, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbe, 0x00}}, {2, [3]byte{0xc2, 0xbf, 0x00}}, + {2, [3]byte{0xc3, 0x80, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc3, 0x83, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc3, 0x87, 0x00}}, + {2, [3]byte{0xc3, 0x88, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc3, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc3, 0x8f, 0x00}}, + {2, [3]byte{0xc4, 0x9e, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc3, 0x92, 0x00}}, {2, [3]byte{0xc3, 0x93, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {2, [3]byte{0xc3, 0x98, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0x9b, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc4, 0xb0, 0x00}}, + {2, [3]byte{0xc5, 0x9e, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc3, 0xa0, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xc3, 0xa3, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa5, 0x00}}, + {2, [3]byte{0xc3, 0xa6, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xac, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc4, 0x9f, 0x00}}, {2, [3]byte{0xc3, 0xb1, 0x00}}, + {2, [3]byte{0xc3, 0xb2, 0x00}}, {2, [3]byte{0xc3, 0xb3, 0x00}}, + {2, [3]byte{0xc3, 0xb4, 0x00}}, {2, [3]byte{0xc3, 0xb5, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {2, [3]byte{0xc3, 0xb8, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc4, 0xb1, 0x00}}, + {2, [3]byte{0xc5, 0x9f, 0x00}}, {2, [3]byte{0xc3, 0xbf, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0x80000080, 0x81000081, 0x82000082, 0x83000083, 0x84000084, 0x85000085, 0x86000086, 0x87000087, + 0x88000088, 0x89000089, 0x8a00008a, 0x8b00008b, 0x8c00008c, 0x8d00008d, 0x8e00008e, 0x8f00008f, + 0x90000090, 0x91000091, 0x92000092, 0x93000093, 0x94000094, 0x95000095, 0x96000096, 0x97000097, + 0x98000098, 0x99000099, 0x9a00009a, 0x9b00009b, 0x9c00009c, 0x9d00009d, 0x9e00009e, 0x9f00009f, + 0xa00000a0, 0xa10000a1, 0xa20000a2, 0xa30000a3, 0xa40000a4, 0xa50000a5, 0xa60000a6, 0xa70000a7, + 0xa80000a8, 0xa90000a9, 0xaa0000aa, 0xab0000ab, 0xac0000ac, 0xad0000ad, 0xae0000ae, 0xaf0000af, + 0xb00000b0, 0xb10000b1, 0xb20000b2, 0xb30000b3, 0xb40000b4, 0xb50000b5, 0xb60000b6, 0xb70000b7, + 0xb80000b8, 0xb90000b9, 0xba0000ba, 0xbb0000bb, 0xbc0000bc, 0xbd0000bd, 0xbe0000be, 0xbf0000bf, + 0xc00000c0, 0xc10000c1, 0xc20000c2, 0xc30000c3, 0xc40000c4, 0xc50000c5, 0xc60000c6, 0xc70000c7, + 0xc80000c8, 0xc90000c9, 0xca0000ca, 0xcb0000cb, 0xcc0000cc, 0xcd0000cd, 0xce0000ce, 0xcf0000cf, + 0xd10000d1, 0xd20000d2, 0xd30000d3, 0xd40000d4, 0xd50000d5, 0xd60000d6, 0xd70000d7, 0xd80000d8, + 0xd90000d9, 0xda0000da, 0xdb0000db, 0xdc0000dc, 0xdf0000df, 0xe00000e0, 0xe10000e1, 0xe20000e2, + 0xe30000e3, 0xe40000e4, 0xe50000e5, 0xe60000e6, 0xe70000e7, 0xe80000e8, 0xe90000e9, 0xea0000ea, + 0xeb0000eb, 0xec0000ec, 0xed0000ed, 0xee0000ee, 0xef0000ef, 0xf10000f1, 0xf20000f2, 0xf30000f3, + 0xf40000f4, 0xf50000f5, 0xf60000f6, 0xf70000f7, 0xf80000f8, 0xf90000f9, 0xfa0000fa, 0xfb0000fb, + 0xfc0000fc, 0xff0000ff, 0xd000011e, 0xf000011f, 0xdd000130, 0xfd000131, 0xde00015e, 0xfe00015f, + }, +} + +// ISO8859_10 is the ISO 8859-10 encoding. +var ISO8859_10 *Charmap = &iso8859_10 + +var iso8859_10 = Charmap{ + name: "ISO 8859-10", + mib: identifier.ISOLatin6, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xc4, 0x84, 0x00}}, + {2, [3]byte{0xc4, 0x92, 0x00}}, {2, [3]byte{0xc4, 0xa2, 0x00}}, + {2, [3]byte{0xc4, 0xaa, 0x00}}, {2, [3]byte{0xc4, 0xa8, 0x00}}, + {2, [3]byte{0xc4, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc4, 0xbb, 0x00}}, {2, [3]byte{0xc4, 0x90, 0x00}}, + {2, [3]byte{0xc5, 0xa0, 0x00}}, {2, [3]byte{0xc5, 0xa6, 0x00}}, + {2, [3]byte{0xc5, 0xbd, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc5, 0xaa, 0x00}}, {2, [3]byte{0xc5, 0x8a, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc4, 0x85, 0x00}}, + {2, [3]byte{0xc4, 0x93, 0x00}}, {2, [3]byte{0xc4, 0xa3, 0x00}}, + {2, [3]byte{0xc4, 0xab, 0x00}}, {2, [3]byte{0xc4, 0xa9, 0x00}}, + {2, [3]byte{0xc4, 0xb7, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc4, 0xbc, 0x00}}, {2, [3]byte{0xc4, 0x91, 0x00}}, + {2, [3]byte{0xc5, 0xa1, 0x00}}, {2, [3]byte{0xc5, 0xa7, 0x00}}, + {2, [3]byte{0xc5, 0xbe, 0x00}}, {3, [3]byte{0xe2, 0x80, 0x95}}, + {2, [3]byte{0xc5, 0xab, 0x00}}, {2, [3]byte{0xc5, 0x8b, 0x00}}, + {2, [3]byte{0xc4, 0x80, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc3, 0x83, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc4, 0xae, 0x00}}, + {2, [3]byte{0xc4, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc4, 0x98, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc4, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc3, 0x8f, 0x00}}, + {2, [3]byte{0xc3, 0x90, 0x00}}, {2, [3]byte{0xc5, 0x85, 0x00}}, + {2, [3]byte{0xc5, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x93, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc5, 0xa8, 0x00}}, + {2, [3]byte{0xc3, 0x98, 0x00}}, {2, [3]byte{0xc5, 0xb2, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0x9b, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0x9d, 0x00}}, + {2, [3]byte{0xc3, 0x9e, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc4, 0x81, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xc3, 0xa3, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa5, 0x00}}, + {2, [3]byte{0xc3, 0xa6, 0x00}}, {2, [3]byte{0xc4, 0xaf, 0x00}}, + {2, [3]byte{0xc4, 0x8d, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc4, 0x99, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc4, 0x97, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0xb0, 0x00}}, {2, [3]byte{0xc5, 0x86, 0x00}}, + {2, [3]byte{0xc5, 0x8d, 0x00}}, {2, [3]byte{0xc3, 0xb3, 0x00}}, + {2, [3]byte{0xc3, 0xb4, 0x00}}, {2, [3]byte{0xc3, 0xb5, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc5, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0xb8, 0x00}}, {2, [3]byte{0xc5, 0xb3, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc3, 0xbd, 0x00}}, + {2, [3]byte{0xc3, 0xbe, 0x00}}, {2, [3]byte{0xc4, 0xb8, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa70000a7, 0xad0000ad, 0xb00000b0, 0xb70000b7, 0xc10000c1, 0xc20000c2, 0xc30000c3, + 0xc40000c4, 0xc50000c5, 0xc60000c6, 0xc90000c9, 0xcb0000cb, 0xcd0000cd, 0xce0000ce, 0xcf0000cf, + 0xd00000d0, 0xd30000d3, 0xd40000d4, 0xd50000d5, 0xd60000d6, 0xd80000d8, 0xda0000da, 0xdb0000db, + 0xdc0000dc, 0xdd0000dd, 0xde0000de, 0xdf0000df, 0xe10000e1, 0xe20000e2, 0xe30000e3, 0xe40000e4, + 0xe50000e5, 0xe60000e6, 0xe90000e9, 0xeb0000eb, 0xed0000ed, 0xee0000ee, 0xef0000ef, 0xf00000f0, + 0xf30000f3, 0xf40000f4, 0xf50000f5, 0xf60000f6, 0xf80000f8, 0xfa0000fa, 0xfb0000fb, 0xfc0000fc, + 0xfd0000fd, 0xfe0000fe, 0xc0000100, 0xe0000101, 0xa1000104, 0xb1000105, 0xc800010c, 0xe800010d, + 0xa9000110, 0xb9000111, 0xa2000112, 0xb2000113, 0xcc000116, 0xec000117, 0xca000118, 0xea000119, + 0xa3000122, 0xb3000123, 0xa5000128, 0xb5000129, 0xa400012a, 0xb400012b, 0xc700012e, 0xe700012f, + 0xa6000136, 0xb6000137, 0xff000138, 0xa800013b, 0xb800013c, 0xd1000145, 0xf1000146, 0xaf00014a, + 0xbf00014b, 0xd200014c, 0xf200014d, 0xaa000160, 0xba000161, 0xab000166, 0xbb000167, 0xd7000168, + 0xf7000169, 0xae00016a, 0xbe00016b, 0xd9000172, 0xf9000173, 0xac00017d, 0xbc00017e, 0xbd002015, + 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, + 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, + 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, + 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, 0xbd002015, + }, +} + +// ISO8859_13 is the ISO 8859-13 encoding. +var ISO8859_13 *Charmap = &iso8859_13 + +var iso8859_13 = Charmap{ + name: "ISO 8859-13", + mib: identifier.ISO885913, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {3, [3]byte{0xe2, 0x80, 0x9d}}, + {2, [3]byte{0xc2, 0xa2, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {3, [3]byte{0xe2, 0x80, 0x9e}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0x98, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xc5, 0x96, 0x00}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xc3, 0x86, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc2, 0xb3, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0x9c}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc3, 0xb8, 0x00}}, {2, [3]byte{0xc2, 0xb9, 0x00}}, + {2, [3]byte{0xc5, 0x97, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbe, 0x00}}, {2, [3]byte{0xc3, 0xa6, 0x00}}, + {2, [3]byte{0xc4, 0x84, 0x00}}, {2, [3]byte{0xc4, 0xae, 0x00}}, + {2, [3]byte{0xc4, 0x80, 0x00}}, {2, [3]byte{0xc4, 0x86, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc4, 0x98, 0x00}}, {2, [3]byte{0xc4, 0x92, 0x00}}, + {2, [3]byte{0xc4, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc5, 0xb9, 0x00}}, {2, [3]byte{0xc4, 0x96, 0x00}}, + {2, [3]byte{0xc4, 0xa2, 0x00}}, {2, [3]byte{0xc4, 0xb6, 0x00}}, + {2, [3]byte{0xc4, 0xaa, 0x00}}, {2, [3]byte{0xc4, 0xbb, 0x00}}, + {2, [3]byte{0xc5, 0xa0, 0x00}}, {2, [3]byte{0xc5, 0x83, 0x00}}, + {2, [3]byte{0xc5, 0x85, 0x00}}, {2, [3]byte{0xc3, 0x93, 0x00}}, + {2, [3]byte{0xc5, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {2, [3]byte{0xc5, 0xb2, 0x00}}, {2, [3]byte{0xc5, 0x81, 0x00}}, + {2, [3]byte{0xc5, 0x9a, 0x00}}, {2, [3]byte{0xc5, 0xaa, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc5, 0xbb, 0x00}}, + {2, [3]byte{0xc5, 0xbd, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc4, 0x85, 0x00}}, {2, [3]byte{0xc4, 0xaf, 0x00}}, + {2, [3]byte{0xc4, 0x81, 0x00}}, {2, [3]byte{0xc4, 0x87, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa5, 0x00}}, + {2, [3]byte{0xc4, 0x99, 0x00}}, {2, [3]byte{0xc4, 0x93, 0x00}}, + {2, [3]byte{0xc4, 0x8d, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc5, 0xba, 0x00}}, {2, [3]byte{0xc4, 0x97, 0x00}}, + {2, [3]byte{0xc4, 0xa3, 0x00}}, {2, [3]byte{0xc4, 0xb7, 0x00}}, + {2, [3]byte{0xc4, 0xab, 0x00}}, {2, [3]byte{0xc4, 0xbc, 0x00}}, + {2, [3]byte{0xc5, 0xa1, 0x00}}, {2, [3]byte{0xc5, 0x84, 0x00}}, + {2, [3]byte{0xc5, 0x86, 0x00}}, {2, [3]byte{0xc3, 0xb3, 0x00}}, + {2, [3]byte{0xc5, 0x8d, 0x00}}, {2, [3]byte{0xc3, 0xb5, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {2, [3]byte{0xc5, 0xb3, 0x00}}, {2, [3]byte{0xc5, 0x82, 0x00}}, + {2, [3]byte{0xc5, 0x9b, 0x00}}, {2, [3]byte{0xc5, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc5, 0xbc, 0x00}}, + {2, [3]byte{0xc5, 0xbe, 0x00}}, {3, [3]byte{0xe2, 0x80, 0x99}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa20000a2, 0xa30000a3, 0xa40000a4, 0xa60000a6, 0xa70000a7, 0xa90000a9, 0xab0000ab, + 0xac0000ac, 0xad0000ad, 0xae0000ae, 0xb00000b0, 0xb10000b1, 0xb20000b2, 0xb30000b3, 0xb50000b5, + 0xb60000b6, 0xb70000b7, 0xb90000b9, 0xbb0000bb, 0xbc0000bc, 0xbd0000bd, 0xbe0000be, 0xc40000c4, + 0xc50000c5, 0xaf0000c6, 0xc90000c9, 0xd30000d3, 0xd50000d5, 0xd60000d6, 0xd70000d7, 0xa80000d8, + 0xdc0000dc, 0xdf0000df, 0xe40000e4, 0xe50000e5, 0xbf0000e6, 0xe90000e9, 0xf30000f3, 0xf50000f5, + 0xf60000f6, 0xf70000f7, 0xb80000f8, 0xfc0000fc, 0xc2000100, 0xe2000101, 0xc0000104, 0xe0000105, + 0xc3000106, 0xe3000107, 0xc800010c, 0xe800010d, 0xc7000112, 0xe7000113, 0xcb000116, 0xeb000117, + 0xc6000118, 0xe6000119, 0xcc000122, 0xec000123, 0xce00012a, 0xee00012b, 0xc100012e, 0xe100012f, + 0xcd000136, 0xed000137, 0xcf00013b, 0xef00013c, 0xd9000141, 0xf9000142, 0xd1000143, 0xf1000144, + 0xd2000145, 0xf2000146, 0xd400014c, 0xf400014d, 0xaa000156, 0xba000157, 0xda00015a, 0xfa00015b, + 0xd0000160, 0xf0000161, 0xdb00016a, 0xfb00016b, 0xd8000172, 0xf8000173, 0xca000179, 0xea00017a, + 0xdd00017b, 0xfd00017c, 0xde00017d, 0xfe00017e, 0xff002019, 0xb400201c, 0xa100201d, 0xa500201e, + 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, + 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, + 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, + 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, 0xa500201e, + }, +} + +// ISO8859_14 is the ISO 8859-14 encoding. +var ISO8859_14 *Charmap = &iso8859_14 + +var iso8859_14 = Charmap{ + name: "ISO 8859-14", + mib: identifier.ISO885914, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {3, [3]byte{0xe1, 0xb8, 0x82}}, + {3, [3]byte{0xe1, 0xb8, 0x83}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc4, 0x8a, 0x00}}, {2, [3]byte{0xc4, 0x8b, 0x00}}, + {3, [3]byte{0xe1, 0xb8, 0x8a}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {3, [3]byte{0xe1, 0xba, 0x80}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {3, [3]byte{0xe1, 0xba, 0x82}}, {3, [3]byte{0xe1, 0xb8, 0x8b}}, + {3, [3]byte{0xe1, 0xbb, 0xb2}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xc5, 0xb8, 0x00}}, + {3, [3]byte{0xe1, 0xb8, 0x9e}}, {3, [3]byte{0xe1, 0xb8, 0x9f}}, + {2, [3]byte{0xc4, 0xa0, 0x00}}, {2, [3]byte{0xc4, 0xa1, 0x00}}, + {3, [3]byte{0xe1, 0xb9, 0x80}}, {3, [3]byte{0xe1, 0xb9, 0x81}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {3, [3]byte{0xe1, 0xb9, 0x96}}, + {3, [3]byte{0xe1, 0xba, 0x81}}, {3, [3]byte{0xe1, 0xb9, 0x97}}, + {3, [3]byte{0xe1, 0xba, 0x83}}, {3, [3]byte{0xe1, 0xb9, 0xa0}}, + {3, [3]byte{0xe1, 0xbb, 0xb3}}, {3, [3]byte{0xe1, 0xba, 0x84}}, + {3, [3]byte{0xe1, 0xba, 0x85}}, {3, [3]byte{0xe1, 0xb9, 0xa1}}, + {2, [3]byte{0xc3, 0x80, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc3, 0x83, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc3, 0x87, 0x00}}, + {2, [3]byte{0xc3, 0x88, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc3, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc3, 0x8f, 0x00}}, + {2, [3]byte{0xc5, 0xb4, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc3, 0x92, 0x00}}, {2, [3]byte{0xc3, 0x93, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {3, [3]byte{0xe1, 0xb9, 0xaa}}, + {2, [3]byte{0xc3, 0x98, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0x9b, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0x9d, 0x00}}, + {2, [3]byte{0xc5, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc3, 0xa0, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xc3, 0xa3, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa5, 0x00}}, + {2, [3]byte{0xc3, 0xa6, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xac, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc5, 0xb5, 0x00}}, {2, [3]byte{0xc3, 0xb1, 0x00}}, + {2, [3]byte{0xc3, 0xb2, 0x00}}, {2, [3]byte{0xc3, 0xb3, 0x00}}, + {2, [3]byte{0xc3, 0xb4, 0x00}}, {2, [3]byte{0xc3, 0xb5, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {3, [3]byte{0xe1, 0xb9, 0xab}}, + {2, [3]byte{0xc3, 0xb8, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc3, 0xbd, 0x00}}, + {2, [3]byte{0xc5, 0xb7, 0x00}}, {2, [3]byte{0xc3, 0xbf, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa30000a3, 0xa70000a7, 0xa90000a9, 0xad0000ad, 0xae0000ae, 0xb60000b6, 0xc00000c0, + 0xc10000c1, 0xc20000c2, 0xc30000c3, 0xc40000c4, 0xc50000c5, 0xc60000c6, 0xc70000c7, 0xc80000c8, + 0xc90000c9, 0xca0000ca, 0xcb0000cb, 0xcc0000cc, 0xcd0000cd, 0xce0000ce, 0xcf0000cf, 0xd10000d1, + 0xd20000d2, 0xd30000d3, 0xd40000d4, 0xd50000d5, 0xd60000d6, 0xd80000d8, 0xd90000d9, 0xda0000da, + 0xdb0000db, 0xdc0000dc, 0xdd0000dd, 0xdf0000df, 0xe00000e0, 0xe10000e1, 0xe20000e2, 0xe30000e3, + 0xe40000e4, 0xe50000e5, 0xe60000e6, 0xe70000e7, 0xe80000e8, 0xe90000e9, 0xea0000ea, 0xeb0000eb, + 0xec0000ec, 0xed0000ed, 0xee0000ee, 0xef0000ef, 0xf10000f1, 0xf20000f2, 0xf30000f3, 0xf40000f4, + 0xf50000f5, 0xf60000f6, 0xf80000f8, 0xf90000f9, 0xfa0000fa, 0xfb0000fb, 0xfc0000fc, 0xfd0000fd, + 0xff0000ff, 0xa400010a, 0xa500010b, 0xb2000120, 0xb3000121, 0xd0000174, 0xf0000175, 0xde000176, + 0xfe000177, 0xaf000178, 0xa1001e02, 0xa2001e03, 0xa6001e0a, 0xab001e0b, 0xb0001e1e, 0xb1001e1f, + 0xb4001e40, 0xb5001e41, 0xb7001e56, 0xb9001e57, 0xbb001e60, 0xbf001e61, 0xd7001e6a, 0xf7001e6b, + 0xa8001e80, 0xb8001e81, 0xaa001e82, 0xba001e83, 0xbd001e84, 0xbe001e85, 0xac001ef2, 0xbc001ef3, + 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, + 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, + 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, + 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, 0xbc001ef3, + }, +} + +// ISO8859_15 is the ISO 8859-15 encoding. +var ISO8859_15 *Charmap = &iso8859_15 + +var iso8859_15 = Charmap{ + name: "ISO 8859-15", + mib: identifier.ISO885915, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xc2, 0xa1, 0x00}}, + {2, [3]byte{0xc2, 0xa2, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xac}}, {2, [3]byte{0xc2, 0xa5, 0x00}}, + {2, [3]byte{0xc5, 0xa0, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc5, 0xa1, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xc2, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xc2, 0xaf, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc2, 0xb3, 0x00}}, + {2, [3]byte{0xc5, 0xbd, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc5, 0xbe, 0x00}}, {2, [3]byte{0xc2, 0xb9, 0x00}}, + {2, [3]byte{0xc2, 0xba, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc5, 0x92, 0x00}}, {2, [3]byte{0xc5, 0x93, 0x00}}, + {2, [3]byte{0xc5, 0xb8, 0x00}}, {2, [3]byte{0xc2, 0xbf, 0x00}}, + {2, [3]byte{0xc3, 0x80, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc3, 0x83, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc3, 0x87, 0x00}}, + {2, [3]byte{0xc3, 0x88, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc3, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc3, 0x8f, 0x00}}, + {2, [3]byte{0xc3, 0x90, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc3, 0x92, 0x00}}, {2, [3]byte{0xc3, 0x93, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {2, [3]byte{0xc3, 0x98, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0x9b, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0x9d, 0x00}}, + {2, [3]byte{0xc3, 0x9e, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc3, 0xa0, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xc3, 0xa3, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa5, 0x00}}, + {2, [3]byte{0xc3, 0xa6, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xac, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0xb0, 0x00}}, {2, [3]byte{0xc3, 0xb1, 0x00}}, + {2, [3]byte{0xc3, 0xb2, 0x00}}, {2, [3]byte{0xc3, 0xb3, 0x00}}, + {2, [3]byte{0xc3, 0xb4, 0x00}}, {2, [3]byte{0xc3, 0xb5, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {2, [3]byte{0xc3, 0xb8, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc3, 0xbd, 0x00}}, + {2, [3]byte{0xc3, 0xbe, 0x00}}, {2, [3]byte{0xc3, 0xbf, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa10000a1, 0xa20000a2, 0xa30000a3, 0xa50000a5, 0xa70000a7, 0xa90000a9, 0xaa0000aa, + 0xab0000ab, 0xac0000ac, 0xad0000ad, 0xae0000ae, 0xaf0000af, 0xb00000b0, 0xb10000b1, 0xb20000b2, + 0xb30000b3, 0xb50000b5, 0xb60000b6, 0xb70000b7, 0xb90000b9, 0xba0000ba, 0xbb0000bb, 0xbf0000bf, + 0xc00000c0, 0xc10000c1, 0xc20000c2, 0xc30000c3, 0xc40000c4, 0xc50000c5, 0xc60000c6, 0xc70000c7, + 0xc80000c8, 0xc90000c9, 0xca0000ca, 0xcb0000cb, 0xcc0000cc, 0xcd0000cd, 0xce0000ce, 0xcf0000cf, + 0xd00000d0, 0xd10000d1, 0xd20000d2, 0xd30000d3, 0xd40000d4, 0xd50000d5, 0xd60000d6, 0xd70000d7, + 0xd80000d8, 0xd90000d9, 0xda0000da, 0xdb0000db, 0xdc0000dc, 0xdd0000dd, 0xde0000de, 0xdf0000df, + 0xe00000e0, 0xe10000e1, 0xe20000e2, 0xe30000e3, 0xe40000e4, 0xe50000e5, 0xe60000e6, 0xe70000e7, + 0xe80000e8, 0xe90000e9, 0xea0000ea, 0xeb0000eb, 0xec0000ec, 0xed0000ed, 0xee0000ee, 0xef0000ef, + 0xf00000f0, 0xf10000f1, 0xf20000f2, 0xf30000f3, 0xf40000f4, 0xf50000f5, 0xf60000f6, 0xf70000f7, + 0xf80000f8, 0xf90000f9, 0xfa0000fa, 0xfb0000fb, 0xfc0000fc, 0xfd0000fd, 0xfe0000fe, 0xff0000ff, + 0xbc000152, 0xbd000153, 0xa6000160, 0xa8000161, 0xbe000178, 0xb400017d, 0xb800017e, 0xa40020ac, + 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, + 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, + 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, + 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, + }, +} + +// ISO8859_16 is the ISO 8859-16 encoding. +var ISO8859_16 *Charmap = &iso8859_16 + +var iso8859_16 = Charmap{ + name: "ISO 8859-16", + mib: identifier.ISO885916, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xc4, 0x84, 0x00}}, + {2, [3]byte{0xc4, 0x85, 0x00}}, {2, [3]byte{0xc5, 0x81, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xac}}, {3, [3]byte{0xe2, 0x80, 0x9e}}, + {2, [3]byte{0xc5, 0xa0, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc5, 0xa1, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xc8, 0x98, 0x00}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc5, 0xb9, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc5, 0xba, 0x00}}, {2, [3]byte{0xc5, 0xbb, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc4, 0x8c, 0x00}}, {2, [3]byte{0xc5, 0x82, 0x00}}, + {2, [3]byte{0xc5, 0xbd, 0x00}}, {3, [3]byte{0xe2, 0x80, 0x9d}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc5, 0xbe, 0x00}}, {2, [3]byte{0xc4, 0x8d, 0x00}}, + {2, [3]byte{0xc8, 0x99, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc5, 0x92, 0x00}}, {2, [3]byte{0xc5, 0x93, 0x00}}, + {2, [3]byte{0xc5, 0xb8, 0x00}}, {2, [3]byte{0xc5, 0xbc, 0x00}}, + {2, [3]byte{0xc3, 0x80, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc4, 0x82, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc4, 0x86, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc3, 0x87, 0x00}}, + {2, [3]byte{0xc3, 0x88, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc3, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc3, 0x8f, 0x00}}, + {2, [3]byte{0xc4, 0x90, 0x00}}, {2, [3]byte{0xc5, 0x83, 0x00}}, + {2, [3]byte{0xc3, 0x92, 0x00}}, {2, [3]byte{0xc3, 0x93, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc5, 0x90, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc5, 0x9a, 0x00}}, + {2, [3]byte{0xc5, 0xb0, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0x9b, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc4, 0x98, 0x00}}, + {2, [3]byte{0xc8, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc3, 0xa0, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xc4, 0x83, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc4, 0x87, 0x00}}, + {2, [3]byte{0xc3, 0xa6, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xac, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc4, 0x91, 0x00}}, {2, [3]byte{0xc5, 0x84, 0x00}}, + {2, [3]byte{0xc3, 0xb2, 0x00}}, {2, [3]byte{0xc3, 0xb3, 0x00}}, + {2, [3]byte{0xc3, 0xb4, 0x00}}, {2, [3]byte{0xc5, 0x91, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc5, 0x9b, 0x00}}, + {2, [3]byte{0xc5, 0xb1, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc4, 0x99, 0x00}}, + {2, [3]byte{0xc8, 0x9b, 0x00}}, {2, [3]byte{0xc3, 0xbf, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa70000a7, 0xa90000a9, 0xab0000ab, 0xad0000ad, 0xb00000b0, 0xb10000b1, 0xb60000b6, + 0xb70000b7, 0xbb0000bb, 0xc00000c0, 0xc10000c1, 0xc20000c2, 0xc40000c4, 0xc60000c6, 0xc70000c7, + 0xc80000c8, 0xc90000c9, 0xca0000ca, 0xcb0000cb, 0xcc0000cc, 0xcd0000cd, 0xce0000ce, 0xcf0000cf, + 0xd20000d2, 0xd30000d3, 0xd40000d4, 0xd60000d6, 0xd90000d9, 0xda0000da, 0xdb0000db, 0xdc0000dc, + 0xdf0000df, 0xe00000e0, 0xe10000e1, 0xe20000e2, 0xe40000e4, 0xe60000e6, 0xe70000e7, 0xe80000e8, + 0xe90000e9, 0xea0000ea, 0xeb0000eb, 0xec0000ec, 0xed0000ed, 0xee0000ee, 0xef0000ef, 0xf20000f2, + 0xf30000f3, 0xf40000f4, 0xf60000f6, 0xf90000f9, 0xfa0000fa, 0xfb0000fb, 0xfc0000fc, 0xff0000ff, + 0xc3000102, 0xe3000103, 0xa1000104, 0xa2000105, 0xc5000106, 0xe5000107, 0xb200010c, 0xb900010d, + 0xd0000110, 0xf0000111, 0xdd000118, 0xfd000119, 0xa3000141, 0xb3000142, 0xd1000143, 0xf1000144, + 0xd5000150, 0xf5000151, 0xbc000152, 0xbd000153, 0xd700015a, 0xf700015b, 0xa6000160, 0xa8000161, + 0xd8000170, 0xf8000171, 0xbe000178, 0xac000179, 0xae00017a, 0xaf00017b, 0xbf00017c, 0xb400017d, + 0xb800017e, 0xaa000218, 0xba000219, 0xde00021a, 0xfe00021b, 0xb500201d, 0xa500201e, 0xa40020ac, + 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, + 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, + 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, + 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, 0xa40020ac, + }, +} + +// KOI8R is the KOI8-R encoding. +var KOI8R *Charmap = &koi8R + +var koi8R = Charmap{ + name: "KOI8-R", + mib: identifier.KOI8R, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xe2, 0x94, 0x80}}, {3, [3]byte{0xe2, 0x94, 0x82}}, + {3, [3]byte{0xe2, 0x94, 0x8c}}, {3, [3]byte{0xe2, 0x94, 0x90}}, + {3, [3]byte{0xe2, 0x94, 0x94}}, {3, [3]byte{0xe2, 0x94, 0x98}}, + {3, [3]byte{0xe2, 0x94, 0x9c}}, {3, [3]byte{0xe2, 0x94, 0xa4}}, + {3, [3]byte{0xe2, 0x94, 0xac}}, {3, [3]byte{0xe2, 0x94, 0xb4}}, + {3, [3]byte{0xe2, 0x94, 0xbc}}, {3, [3]byte{0xe2, 0x96, 0x80}}, + {3, [3]byte{0xe2, 0x96, 0x84}}, {3, [3]byte{0xe2, 0x96, 0x88}}, + {3, [3]byte{0xe2, 0x96, 0x8c}}, {3, [3]byte{0xe2, 0x96, 0x90}}, + {3, [3]byte{0xe2, 0x96, 0x91}}, {3, [3]byte{0xe2, 0x96, 0x92}}, + {3, [3]byte{0xe2, 0x96, 0x93}}, {3, [3]byte{0xe2, 0x8c, 0xa0}}, + {3, [3]byte{0xe2, 0x96, 0xa0}}, {3, [3]byte{0xe2, 0x88, 0x99}}, + {3, [3]byte{0xe2, 0x88, 0x9a}}, {3, [3]byte{0xe2, 0x89, 0x88}}, + {3, [3]byte{0xe2, 0x89, 0xa4}}, {3, [3]byte{0xe2, 0x89, 0xa5}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {3, [3]byte{0xe2, 0x8c, 0xa1}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb2, 0x00}}, + {2, [3]byte{0xc2, 0xb7, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {3, [3]byte{0xe2, 0x95, 0x90}}, {3, [3]byte{0xe2, 0x95, 0x91}}, + {3, [3]byte{0xe2, 0x95, 0x92}}, {2, [3]byte{0xd1, 0x91, 0x00}}, + {3, [3]byte{0xe2, 0x95, 0x93}}, {3, [3]byte{0xe2, 0x95, 0x94}}, + {3, [3]byte{0xe2, 0x95, 0x95}}, {3, [3]byte{0xe2, 0x95, 0x96}}, + {3, [3]byte{0xe2, 0x95, 0x97}}, {3, [3]byte{0xe2, 0x95, 0x98}}, + {3, [3]byte{0xe2, 0x95, 0x99}}, {3, [3]byte{0xe2, 0x95, 0x9a}}, + {3, [3]byte{0xe2, 0x95, 0x9b}}, {3, [3]byte{0xe2, 0x95, 0x9c}}, + {3, [3]byte{0xe2, 0x95, 0x9d}}, {3, [3]byte{0xe2, 0x95, 0x9e}}, + {3, [3]byte{0xe2, 0x95, 0x9f}}, {3, [3]byte{0xe2, 0x95, 0xa0}}, + {3, [3]byte{0xe2, 0x95, 0xa1}}, {2, [3]byte{0xd0, 0x81, 0x00}}, + {3, [3]byte{0xe2, 0x95, 0xa2}}, {3, [3]byte{0xe2, 0x95, 0xa3}}, + {3, [3]byte{0xe2, 0x95, 0xa4}}, {3, [3]byte{0xe2, 0x95, 0xa5}}, + {3, [3]byte{0xe2, 0x95, 0xa6}}, {3, [3]byte{0xe2, 0x95, 0xa7}}, + {3, [3]byte{0xe2, 0x95, 0xa8}}, {3, [3]byte{0xe2, 0x95, 0xa9}}, + {3, [3]byte{0xe2, 0x95, 0xaa}}, {3, [3]byte{0xe2, 0x95, 0xab}}, + {3, [3]byte{0xe2, 0x95, 0xac}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xd1, 0x8e, 0x00}}, {2, [3]byte{0xd0, 0xb0, 0x00}}, + {2, [3]byte{0xd0, 0xb1, 0x00}}, {2, [3]byte{0xd1, 0x86, 0x00}}, + {2, [3]byte{0xd0, 0xb4, 0x00}}, {2, [3]byte{0xd0, 0xb5, 0x00}}, + {2, [3]byte{0xd1, 0x84, 0x00}}, {2, [3]byte{0xd0, 0xb3, 0x00}}, + {2, [3]byte{0xd1, 0x85, 0x00}}, {2, [3]byte{0xd0, 0xb8, 0x00}}, + {2, [3]byte{0xd0, 0xb9, 0x00}}, {2, [3]byte{0xd0, 0xba, 0x00}}, + {2, [3]byte{0xd0, 0xbb, 0x00}}, {2, [3]byte{0xd0, 0xbc, 0x00}}, + {2, [3]byte{0xd0, 0xbd, 0x00}}, {2, [3]byte{0xd0, 0xbe, 0x00}}, + {2, [3]byte{0xd0, 0xbf, 0x00}}, {2, [3]byte{0xd1, 0x8f, 0x00}}, + {2, [3]byte{0xd1, 0x80, 0x00}}, {2, [3]byte{0xd1, 0x81, 0x00}}, + {2, [3]byte{0xd1, 0x82, 0x00}}, {2, [3]byte{0xd1, 0x83, 0x00}}, + {2, [3]byte{0xd0, 0xb6, 0x00}}, {2, [3]byte{0xd0, 0xb2, 0x00}}, + {2, [3]byte{0xd1, 0x8c, 0x00}}, {2, [3]byte{0xd1, 0x8b, 0x00}}, + {2, [3]byte{0xd0, 0xb7, 0x00}}, {2, [3]byte{0xd1, 0x88, 0x00}}, + {2, [3]byte{0xd1, 0x8d, 0x00}}, {2, [3]byte{0xd1, 0x89, 0x00}}, + {2, [3]byte{0xd1, 0x87, 0x00}}, {2, [3]byte{0xd1, 0x8a, 0x00}}, + {2, [3]byte{0xd0, 0xae, 0x00}}, {2, [3]byte{0xd0, 0x90, 0x00}}, + {2, [3]byte{0xd0, 0x91, 0x00}}, {2, [3]byte{0xd0, 0xa6, 0x00}}, + {2, [3]byte{0xd0, 0x94, 0x00}}, {2, [3]byte{0xd0, 0x95, 0x00}}, + {2, [3]byte{0xd0, 0xa4, 0x00}}, {2, [3]byte{0xd0, 0x93, 0x00}}, + {2, [3]byte{0xd0, 0xa5, 0x00}}, {2, [3]byte{0xd0, 0x98, 0x00}}, + {2, [3]byte{0xd0, 0x99, 0x00}}, {2, [3]byte{0xd0, 0x9a, 0x00}}, + {2, [3]byte{0xd0, 0x9b, 0x00}}, {2, [3]byte{0xd0, 0x9c, 0x00}}, + {2, [3]byte{0xd0, 0x9d, 0x00}}, {2, [3]byte{0xd0, 0x9e, 0x00}}, + {2, [3]byte{0xd0, 0x9f, 0x00}}, {2, [3]byte{0xd0, 0xaf, 0x00}}, + {2, [3]byte{0xd0, 0xa0, 0x00}}, {2, [3]byte{0xd0, 0xa1, 0x00}}, + {2, [3]byte{0xd0, 0xa2, 0x00}}, {2, [3]byte{0xd0, 0xa3, 0x00}}, + {2, [3]byte{0xd0, 0x96, 0x00}}, {2, [3]byte{0xd0, 0x92, 0x00}}, + {2, [3]byte{0xd0, 0xac, 0x00}}, {2, [3]byte{0xd0, 0xab, 0x00}}, + {2, [3]byte{0xd0, 0x97, 0x00}}, {2, [3]byte{0xd0, 0xa8, 0x00}}, + {2, [3]byte{0xd0, 0xad, 0x00}}, {2, [3]byte{0xd0, 0xa9, 0x00}}, + {2, [3]byte{0xd0, 0xa7, 0x00}}, {2, [3]byte{0xd0, 0xaa, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0x9a0000a0, 0xbf0000a9, 0x9c0000b0, 0x9d0000b2, 0x9e0000b7, 0x9f0000f7, 0xb3000401, 0xe1000410, + 0xe2000411, 0xf7000412, 0xe7000413, 0xe4000414, 0xe5000415, 0xf6000416, 0xfa000417, 0xe9000418, + 0xea000419, 0xeb00041a, 0xec00041b, 0xed00041c, 0xee00041d, 0xef00041e, 0xf000041f, 0xf2000420, + 0xf3000421, 0xf4000422, 0xf5000423, 0xe6000424, 0xe8000425, 0xe3000426, 0xfe000427, 0xfb000428, + 0xfd000429, 0xff00042a, 0xf900042b, 0xf800042c, 0xfc00042d, 0xe000042e, 0xf100042f, 0xc1000430, + 0xc2000431, 0xd7000432, 0xc7000433, 0xc4000434, 0xc5000435, 0xd6000436, 0xda000437, 0xc9000438, + 0xca000439, 0xcb00043a, 0xcc00043b, 0xcd00043c, 0xce00043d, 0xcf00043e, 0xd000043f, 0xd2000440, + 0xd3000441, 0xd4000442, 0xd5000443, 0xc6000444, 0xc8000445, 0xc3000446, 0xde000447, 0xdb000448, + 0xdd000449, 0xdf00044a, 0xd900044b, 0xd800044c, 0xdc00044d, 0xc000044e, 0xd100044f, 0xa3000451, + 0x95002219, 0x9600221a, 0x97002248, 0x98002264, 0x99002265, 0x93002320, 0x9b002321, 0x80002500, + 0x81002502, 0x8200250c, 0x83002510, 0x84002514, 0x85002518, 0x8600251c, 0x87002524, 0x8800252c, + 0x89002534, 0x8a00253c, 0xa0002550, 0xa1002551, 0xa2002552, 0xa4002553, 0xa5002554, 0xa6002555, + 0xa7002556, 0xa8002557, 0xa9002558, 0xaa002559, 0xab00255a, 0xac00255b, 0xad00255c, 0xae00255d, + 0xaf00255e, 0xb000255f, 0xb1002560, 0xb2002561, 0xb4002562, 0xb5002563, 0xb6002564, 0xb7002565, + 0xb8002566, 0xb9002567, 0xba002568, 0xbb002569, 0xbc00256a, 0xbd00256b, 0xbe00256c, 0x8b002580, + 0x8c002584, 0x8d002588, 0x8e00258c, 0x8f002590, 0x90002591, 0x91002592, 0x92002593, 0x940025a0, + }, +} + +// KOI8U is the KOI8-U encoding. +var KOI8U *Charmap = &koi8U + +var koi8U = Charmap{ + name: "KOI8-U", + mib: identifier.KOI8U, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xe2, 0x94, 0x80}}, {3, [3]byte{0xe2, 0x94, 0x82}}, + {3, [3]byte{0xe2, 0x94, 0x8c}}, {3, [3]byte{0xe2, 0x94, 0x90}}, + {3, [3]byte{0xe2, 0x94, 0x94}}, {3, [3]byte{0xe2, 0x94, 0x98}}, + {3, [3]byte{0xe2, 0x94, 0x9c}}, {3, [3]byte{0xe2, 0x94, 0xa4}}, + {3, [3]byte{0xe2, 0x94, 0xac}}, {3, [3]byte{0xe2, 0x94, 0xb4}}, + {3, [3]byte{0xe2, 0x94, 0xbc}}, {3, [3]byte{0xe2, 0x96, 0x80}}, + {3, [3]byte{0xe2, 0x96, 0x84}}, {3, [3]byte{0xe2, 0x96, 0x88}}, + {3, [3]byte{0xe2, 0x96, 0x8c}}, {3, [3]byte{0xe2, 0x96, 0x90}}, + {3, [3]byte{0xe2, 0x96, 0x91}}, {3, [3]byte{0xe2, 0x96, 0x92}}, + {3, [3]byte{0xe2, 0x96, 0x93}}, {3, [3]byte{0xe2, 0x8c, 0xa0}}, + {3, [3]byte{0xe2, 0x96, 0xa0}}, {3, [3]byte{0xe2, 0x88, 0x99}}, + {3, [3]byte{0xe2, 0x88, 0x9a}}, {3, [3]byte{0xe2, 0x89, 0x88}}, + {3, [3]byte{0xe2, 0x89, 0xa4}}, {3, [3]byte{0xe2, 0x89, 0xa5}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {3, [3]byte{0xe2, 0x8c, 0xa1}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb2, 0x00}}, + {2, [3]byte{0xc2, 0xb7, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {3, [3]byte{0xe2, 0x95, 0x90}}, {3, [3]byte{0xe2, 0x95, 0x91}}, + {3, [3]byte{0xe2, 0x95, 0x92}}, {2, [3]byte{0xd1, 0x91, 0x00}}, + {2, [3]byte{0xd1, 0x94, 0x00}}, {3, [3]byte{0xe2, 0x95, 0x94}}, + {2, [3]byte{0xd1, 0x96, 0x00}}, {2, [3]byte{0xd1, 0x97, 0x00}}, + {3, [3]byte{0xe2, 0x95, 0x97}}, {3, [3]byte{0xe2, 0x95, 0x98}}, + {3, [3]byte{0xe2, 0x95, 0x99}}, {3, [3]byte{0xe2, 0x95, 0x9a}}, + {3, [3]byte{0xe2, 0x95, 0x9b}}, {2, [3]byte{0xd2, 0x91, 0x00}}, + {2, [3]byte{0xd1, 0x9e, 0x00}}, {3, [3]byte{0xe2, 0x95, 0x9e}}, + {3, [3]byte{0xe2, 0x95, 0x9f}}, {3, [3]byte{0xe2, 0x95, 0xa0}}, + {3, [3]byte{0xe2, 0x95, 0xa1}}, {2, [3]byte{0xd0, 0x81, 0x00}}, + {2, [3]byte{0xd0, 0x84, 0x00}}, {3, [3]byte{0xe2, 0x95, 0xa3}}, + {2, [3]byte{0xd0, 0x86, 0x00}}, {2, [3]byte{0xd0, 0x87, 0x00}}, + {3, [3]byte{0xe2, 0x95, 0xa6}}, {3, [3]byte{0xe2, 0x95, 0xa7}}, + {3, [3]byte{0xe2, 0x95, 0xa8}}, {3, [3]byte{0xe2, 0x95, 0xa9}}, + {3, [3]byte{0xe2, 0x95, 0xaa}}, {2, [3]byte{0xd2, 0x90, 0x00}}, + {2, [3]byte{0xd0, 0x8e, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xd1, 0x8e, 0x00}}, {2, [3]byte{0xd0, 0xb0, 0x00}}, + {2, [3]byte{0xd0, 0xb1, 0x00}}, {2, [3]byte{0xd1, 0x86, 0x00}}, + {2, [3]byte{0xd0, 0xb4, 0x00}}, {2, [3]byte{0xd0, 0xb5, 0x00}}, + {2, [3]byte{0xd1, 0x84, 0x00}}, {2, [3]byte{0xd0, 0xb3, 0x00}}, + {2, [3]byte{0xd1, 0x85, 0x00}}, {2, [3]byte{0xd0, 0xb8, 0x00}}, + {2, [3]byte{0xd0, 0xb9, 0x00}}, {2, [3]byte{0xd0, 0xba, 0x00}}, + {2, [3]byte{0xd0, 0xbb, 0x00}}, {2, [3]byte{0xd0, 0xbc, 0x00}}, + {2, [3]byte{0xd0, 0xbd, 0x00}}, {2, [3]byte{0xd0, 0xbe, 0x00}}, + {2, [3]byte{0xd0, 0xbf, 0x00}}, {2, [3]byte{0xd1, 0x8f, 0x00}}, + {2, [3]byte{0xd1, 0x80, 0x00}}, {2, [3]byte{0xd1, 0x81, 0x00}}, + {2, [3]byte{0xd1, 0x82, 0x00}}, {2, [3]byte{0xd1, 0x83, 0x00}}, + {2, [3]byte{0xd0, 0xb6, 0x00}}, {2, [3]byte{0xd0, 0xb2, 0x00}}, + {2, [3]byte{0xd1, 0x8c, 0x00}}, {2, [3]byte{0xd1, 0x8b, 0x00}}, + {2, [3]byte{0xd0, 0xb7, 0x00}}, {2, [3]byte{0xd1, 0x88, 0x00}}, + {2, [3]byte{0xd1, 0x8d, 0x00}}, {2, [3]byte{0xd1, 0x89, 0x00}}, + {2, [3]byte{0xd1, 0x87, 0x00}}, {2, [3]byte{0xd1, 0x8a, 0x00}}, + {2, [3]byte{0xd0, 0xae, 0x00}}, {2, [3]byte{0xd0, 0x90, 0x00}}, + {2, [3]byte{0xd0, 0x91, 0x00}}, {2, [3]byte{0xd0, 0xa6, 0x00}}, + {2, [3]byte{0xd0, 0x94, 0x00}}, {2, [3]byte{0xd0, 0x95, 0x00}}, + {2, [3]byte{0xd0, 0xa4, 0x00}}, {2, [3]byte{0xd0, 0x93, 0x00}}, + {2, [3]byte{0xd0, 0xa5, 0x00}}, {2, [3]byte{0xd0, 0x98, 0x00}}, + {2, [3]byte{0xd0, 0x99, 0x00}}, {2, [3]byte{0xd0, 0x9a, 0x00}}, + {2, [3]byte{0xd0, 0x9b, 0x00}}, {2, [3]byte{0xd0, 0x9c, 0x00}}, + {2, [3]byte{0xd0, 0x9d, 0x00}}, {2, [3]byte{0xd0, 0x9e, 0x00}}, + {2, [3]byte{0xd0, 0x9f, 0x00}}, {2, [3]byte{0xd0, 0xaf, 0x00}}, + {2, [3]byte{0xd0, 0xa0, 0x00}}, {2, [3]byte{0xd0, 0xa1, 0x00}}, + {2, [3]byte{0xd0, 0xa2, 0x00}}, {2, [3]byte{0xd0, 0xa3, 0x00}}, + {2, [3]byte{0xd0, 0x96, 0x00}}, {2, [3]byte{0xd0, 0x92, 0x00}}, + {2, [3]byte{0xd0, 0xac, 0x00}}, {2, [3]byte{0xd0, 0xab, 0x00}}, + {2, [3]byte{0xd0, 0x97, 0x00}}, {2, [3]byte{0xd0, 0xa8, 0x00}}, + {2, [3]byte{0xd0, 0xad, 0x00}}, {2, [3]byte{0xd0, 0xa9, 0x00}}, + {2, [3]byte{0xd0, 0xa7, 0x00}}, {2, [3]byte{0xd0, 0xaa, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0x9a0000a0, 0xbf0000a9, 0x9c0000b0, 0x9d0000b2, 0x9e0000b7, 0x9f0000f7, 0xb3000401, 0xb4000404, + 0xb6000406, 0xb7000407, 0xbe00040e, 0xe1000410, 0xe2000411, 0xf7000412, 0xe7000413, 0xe4000414, + 0xe5000415, 0xf6000416, 0xfa000417, 0xe9000418, 0xea000419, 0xeb00041a, 0xec00041b, 0xed00041c, + 0xee00041d, 0xef00041e, 0xf000041f, 0xf2000420, 0xf3000421, 0xf4000422, 0xf5000423, 0xe6000424, + 0xe8000425, 0xe3000426, 0xfe000427, 0xfb000428, 0xfd000429, 0xff00042a, 0xf900042b, 0xf800042c, + 0xfc00042d, 0xe000042e, 0xf100042f, 0xc1000430, 0xc2000431, 0xd7000432, 0xc7000433, 0xc4000434, + 0xc5000435, 0xd6000436, 0xda000437, 0xc9000438, 0xca000439, 0xcb00043a, 0xcc00043b, 0xcd00043c, + 0xce00043d, 0xcf00043e, 0xd000043f, 0xd2000440, 0xd3000441, 0xd4000442, 0xd5000443, 0xc6000444, + 0xc8000445, 0xc3000446, 0xde000447, 0xdb000448, 0xdd000449, 0xdf00044a, 0xd900044b, 0xd800044c, + 0xdc00044d, 0xc000044e, 0xd100044f, 0xa3000451, 0xa4000454, 0xa6000456, 0xa7000457, 0xae00045e, + 0xbd000490, 0xad000491, 0x95002219, 0x9600221a, 0x97002248, 0x98002264, 0x99002265, 0x93002320, + 0x9b002321, 0x80002500, 0x81002502, 0x8200250c, 0x83002510, 0x84002514, 0x85002518, 0x8600251c, + 0x87002524, 0x8800252c, 0x89002534, 0x8a00253c, 0xa0002550, 0xa1002551, 0xa2002552, 0xa5002554, + 0xa8002557, 0xa9002558, 0xaa002559, 0xab00255a, 0xac00255b, 0xaf00255e, 0xb000255f, 0xb1002560, + 0xb2002561, 0xb5002563, 0xb8002566, 0xb9002567, 0xba002568, 0xbb002569, 0xbc00256a, 0x8b002580, + 0x8c002584, 0x8d002588, 0x8e00258c, 0x8f002590, 0x90002591, 0x91002592, 0x92002593, 0x940025a0, + }, +} + +// Macintosh is the Macintosh encoding. +var Macintosh *Charmap = &macintosh + +var macintosh = Charmap{ + name: "Macintosh", + mib: identifier.Macintosh, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x87, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc3, 0x91, 0x00}}, {2, [3]byte{0xc3, 0x96, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa0, 0x00}}, {2, [3]byte{0xc3, 0xa2, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa3, 0x00}}, + {2, [3]byte{0xc3, 0xa5, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xa9, 0x00}}, {2, [3]byte{0xc3, 0xa8, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xad, 0x00}}, {2, [3]byte{0xc3, 0xac, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0xb1, 0x00}}, {2, [3]byte{0xc3, 0xb3, 0x00}}, + {2, [3]byte{0xc3, 0xb2, 0x00}}, {2, [3]byte{0xc3, 0xb4, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb5, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xbb, 0x00}}, {2, [3]byte{0xc3, 0xbc, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0xa0}}, {2, [3]byte{0xc2, 0xb0, 0x00}}, + {2, [3]byte{0xc2, 0xa2, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa7, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xa2}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {3, [3]byte{0xe2, 0x84, 0xa2}}, {2, [3]byte{0xc2, 0xb4, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {3, [3]byte{0xe2, 0x89, 0xa0}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc3, 0x98, 0x00}}, + {3, [3]byte{0xe2, 0x88, 0x9e}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {3, [3]byte{0xe2, 0x89, 0xa4}}, {3, [3]byte{0xe2, 0x89, 0xa5}}, + {2, [3]byte{0xc2, 0xa5, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {3, [3]byte{0xe2, 0x88, 0x82}}, {3, [3]byte{0xe2, 0x88, 0x91}}, + {3, [3]byte{0xe2, 0x88, 0x8f}}, {2, [3]byte{0xcf, 0x80, 0x00}}, + {3, [3]byte{0xe2, 0x88, 0xab}}, {2, [3]byte{0xc2, 0xaa, 0x00}}, + {2, [3]byte{0xc2, 0xba, 0x00}}, {2, [3]byte{0xce, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0xa6, 0x00}}, {2, [3]byte{0xc3, 0xb8, 0x00}}, + {2, [3]byte{0xc2, 0xbf, 0x00}}, {2, [3]byte{0xc2, 0xa1, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {3, [3]byte{0xe2, 0x88, 0x9a}}, + {2, [3]byte{0xc6, 0x92, 0x00}}, {3, [3]byte{0xe2, 0x89, 0x88}}, + {3, [3]byte{0xe2, 0x88, 0x86}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xbb, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xa6}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xc3, 0x80, 0x00}}, + {2, [3]byte{0xc3, 0x83, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {2, [3]byte{0xc5, 0x92, 0x00}}, {2, [3]byte{0xc5, 0x93, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0x93}}, {3, [3]byte{0xe2, 0x80, 0x94}}, + {3, [3]byte{0xe2, 0x80, 0x9c}}, {3, [3]byte{0xe2, 0x80, 0x9d}}, + {3, [3]byte{0xe2, 0x80, 0x98}}, {3, [3]byte{0xe2, 0x80, 0x99}}, + {2, [3]byte{0xc3, 0xb7, 0x00}}, {3, [3]byte{0xe2, 0x97, 0x8a}}, + {2, [3]byte{0xc3, 0xbf, 0x00}}, {2, [3]byte{0xc5, 0xb8, 0x00}}, + {3, [3]byte{0xe2, 0x81, 0x84}}, {3, [3]byte{0xe2, 0x82, 0xac}}, + {3, [3]byte{0xe2, 0x80, 0xb9}}, {3, [3]byte{0xe2, 0x80, 0xba}}, + {3, [3]byte{0xef, 0xac, 0x81}}, {3, [3]byte{0xef, 0xac, 0x82}}, + {3, [3]byte{0xe2, 0x80, 0xa1}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0x9a}}, {3, [3]byte{0xe2, 0x80, 0x9e}}, + {3, [3]byte{0xe2, 0x80, 0xb0}}, {2, [3]byte{0xc3, 0x82, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x8b, 0x00}}, {2, [3]byte{0xc3, 0x88, 0x00}}, + {2, [3]byte{0xc3, 0x8d, 0x00}}, {2, [3]byte{0xc3, 0x8e, 0x00}}, + {2, [3]byte{0xc3, 0x8f, 0x00}}, {2, [3]byte{0xc3, 0x8c, 0x00}}, + {2, [3]byte{0xc3, 0x93, 0x00}}, {2, [3]byte{0xc3, 0x94, 0x00}}, + {3, [3]byte{0xef, 0xa3, 0xbf}}, {2, [3]byte{0xc3, 0x92, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0x9b, 0x00}}, + {2, [3]byte{0xc3, 0x99, 0x00}}, {2, [3]byte{0xc4, 0xb1, 0x00}}, + {2, [3]byte{0xcb, 0x86, 0x00}}, {2, [3]byte{0xcb, 0x9c, 0x00}}, + {2, [3]byte{0xc2, 0xaf, 0x00}}, {2, [3]byte{0xcb, 0x98, 0x00}}, + {2, [3]byte{0xcb, 0x99, 0x00}}, {2, [3]byte{0xcb, 0x9a, 0x00}}, + {2, [3]byte{0xc2, 0xb8, 0x00}}, {2, [3]byte{0xcb, 0x9d, 0x00}}, + {2, [3]byte{0xcb, 0x9b, 0x00}}, {2, [3]byte{0xcb, 0x87, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xca0000a0, 0xc10000a1, 0xa20000a2, 0xa30000a3, 0xb40000a5, 0xa40000a7, 0xac0000a8, 0xa90000a9, + 0xbb0000aa, 0xc70000ab, 0xc20000ac, 0xa80000ae, 0xf80000af, 0xa10000b0, 0xb10000b1, 0xab0000b4, + 0xb50000b5, 0xa60000b6, 0xe10000b7, 0xfc0000b8, 0xbc0000ba, 0xc80000bb, 0xc00000bf, 0xcb0000c0, + 0xe70000c1, 0xe50000c2, 0xcc0000c3, 0x800000c4, 0x810000c5, 0xae0000c6, 0x820000c7, 0xe90000c8, + 0x830000c9, 0xe60000ca, 0xe80000cb, 0xed0000cc, 0xea0000cd, 0xeb0000ce, 0xec0000cf, 0x840000d1, + 0xf10000d2, 0xee0000d3, 0xef0000d4, 0xcd0000d5, 0x850000d6, 0xaf0000d8, 0xf40000d9, 0xf20000da, + 0xf30000db, 0x860000dc, 0xa70000df, 0x880000e0, 0x870000e1, 0x890000e2, 0x8b0000e3, 0x8a0000e4, + 0x8c0000e5, 0xbe0000e6, 0x8d0000e7, 0x8f0000e8, 0x8e0000e9, 0x900000ea, 0x910000eb, 0x930000ec, + 0x920000ed, 0x940000ee, 0x950000ef, 0x960000f1, 0x980000f2, 0x970000f3, 0x990000f4, 0x9b0000f5, + 0x9a0000f6, 0xd60000f7, 0xbf0000f8, 0x9d0000f9, 0x9c0000fa, 0x9e0000fb, 0x9f0000fc, 0xd80000ff, + 0xf5000131, 0xce000152, 0xcf000153, 0xd9000178, 0xc4000192, 0xf60002c6, 0xff0002c7, 0xf90002d8, + 0xfa0002d9, 0xfb0002da, 0xfe0002db, 0xf70002dc, 0xfd0002dd, 0xbd0003a9, 0xb90003c0, 0xd0002013, + 0xd1002014, 0xd4002018, 0xd5002019, 0xe200201a, 0xd200201c, 0xd300201d, 0xe300201e, 0xa0002020, + 0xe0002021, 0xa5002022, 0xc9002026, 0xe4002030, 0xdc002039, 0xdd00203a, 0xda002044, 0xdb0020ac, + 0xaa002122, 0xb6002202, 0xc6002206, 0xb800220f, 0xb7002211, 0xc300221a, 0xb000221e, 0xba00222b, + 0xc5002248, 0xad002260, 0xb2002264, 0xb3002265, 0xd70025ca, 0xf000f8ff, 0xde00fb01, 0xdf00fb02, + }, +} + +// MacintoshCyrillic is the Macintosh Cyrillic encoding. +var MacintoshCyrillic *Charmap = &macintoshCyrillic + +var macintoshCyrillic = Charmap{ + name: "Macintosh Cyrillic", + mib: identifier.MacintoshCyrillic, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xd0, 0x90, 0x00}}, {2, [3]byte{0xd0, 0x91, 0x00}}, + {2, [3]byte{0xd0, 0x92, 0x00}}, {2, [3]byte{0xd0, 0x93, 0x00}}, + {2, [3]byte{0xd0, 0x94, 0x00}}, {2, [3]byte{0xd0, 0x95, 0x00}}, + {2, [3]byte{0xd0, 0x96, 0x00}}, {2, [3]byte{0xd0, 0x97, 0x00}}, + {2, [3]byte{0xd0, 0x98, 0x00}}, {2, [3]byte{0xd0, 0x99, 0x00}}, + {2, [3]byte{0xd0, 0x9a, 0x00}}, {2, [3]byte{0xd0, 0x9b, 0x00}}, + {2, [3]byte{0xd0, 0x9c, 0x00}}, {2, [3]byte{0xd0, 0x9d, 0x00}}, + {2, [3]byte{0xd0, 0x9e, 0x00}}, {2, [3]byte{0xd0, 0x9f, 0x00}}, + {2, [3]byte{0xd0, 0xa0, 0x00}}, {2, [3]byte{0xd0, 0xa1, 0x00}}, + {2, [3]byte{0xd0, 0xa2, 0x00}}, {2, [3]byte{0xd0, 0xa3, 0x00}}, + {2, [3]byte{0xd0, 0xa4, 0x00}}, {2, [3]byte{0xd0, 0xa5, 0x00}}, + {2, [3]byte{0xd0, 0xa6, 0x00}}, {2, [3]byte{0xd0, 0xa7, 0x00}}, + {2, [3]byte{0xd0, 0xa8, 0x00}}, {2, [3]byte{0xd0, 0xa9, 0x00}}, + {2, [3]byte{0xd0, 0xaa, 0x00}}, {2, [3]byte{0xd0, 0xab, 0x00}}, + {2, [3]byte{0xd0, 0xac, 0x00}}, {2, [3]byte{0xd0, 0xad, 0x00}}, + {2, [3]byte{0xd0, 0xae, 0x00}}, {2, [3]byte{0xd0, 0xaf, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0xa0}}, {2, [3]byte{0xc2, 0xb0, 0x00}}, + {2, [3]byte{0xd2, 0x90, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa7, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xa2}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xd0, 0x86, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {3, [3]byte{0xe2, 0x84, 0xa2}}, {2, [3]byte{0xd0, 0x82, 0x00}}, + {2, [3]byte{0xd1, 0x92, 0x00}}, {3, [3]byte{0xe2, 0x89, 0xa0}}, + {2, [3]byte{0xd0, 0x83, 0x00}}, {2, [3]byte{0xd1, 0x93, 0x00}}, + {3, [3]byte{0xe2, 0x88, 0x9e}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {3, [3]byte{0xe2, 0x89, 0xa4}}, {3, [3]byte{0xe2, 0x89, 0xa5}}, + {2, [3]byte{0xd1, 0x96, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xd2, 0x91, 0x00}}, {2, [3]byte{0xd0, 0x88, 0x00}}, + {2, [3]byte{0xd0, 0x84, 0x00}}, {2, [3]byte{0xd1, 0x94, 0x00}}, + {2, [3]byte{0xd0, 0x87, 0x00}}, {2, [3]byte{0xd1, 0x97, 0x00}}, + {2, [3]byte{0xd0, 0x89, 0x00}}, {2, [3]byte{0xd1, 0x99, 0x00}}, + {2, [3]byte{0xd0, 0x8a, 0x00}}, {2, [3]byte{0xd1, 0x9a, 0x00}}, + {2, [3]byte{0xd1, 0x98, 0x00}}, {2, [3]byte{0xd0, 0x85, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {3, [3]byte{0xe2, 0x88, 0x9a}}, + {2, [3]byte{0xc6, 0x92, 0x00}}, {3, [3]byte{0xe2, 0x89, 0x88}}, + {3, [3]byte{0xe2, 0x88, 0x86}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xbb, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xa6}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xd0, 0x8b, 0x00}}, + {2, [3]byte{0xd1, 0x9b, 0x00}}, {2, [3]byte{0xd0, 0x8c, 0x00}}, + {2, [3]byte{0xd1, 0x9c, 0x00}}, {2, [3]byte{0xd1, 0x95, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0x93}}, {3, [3]byte{0xe2, 0x80, 0x94}}, + {3, [3]byte{0xe2, 0x80, 0x9c}}, {3, [3]byte{0xe2, 0x80, 0x9d}}, + {3, [3]byte{0xe2, 0x80, 0x98}}, {3, [3]byte{0xe2, 0x80, 0x99}}, + {2, [3]byte{0xc3, 0xb7, 0x00}}, {3, [3]byte{0xe2, 0x80, 0x9e}}, + {2, [3]byte{0xd0, 0x8e, 0x00}}, {2, [3]byte{0xd1, 0x9e, 0x00}}, + {2, [3]byte{0xd0, 0x8f, 0x00}}, {2, [3]byte{0xd1, 0x9f, 0x00}}, + {3, [3]byte{0xe2, 0x84, 0x96}}, {2, [3]byte{0xd0, 0x81, 0x00}}, + {2, [3]byte{0xd1, 0x91, 0x00}}, {2, [3]byte{0xd1, 0x8f, 0x00}}, + {2, [3]byte{0xd0, 0xb0, 0x00}}, {2, [3]byte{0xd0, 0xb1, 0x00}}, + {2, [3]byte{0xd0, 0xb2, 0x00}}, {2, [3]byte{0xd0, 0xb3, 0x00}}, + {2, [3]byte{0xd0, 0xb4, 0x00}}, {2, [3]byte{0xd0, 0xb5, 0x00}}, + {2, [3]byte{0xd0, 0xb6, 0x00}}, {2, [3]byte{0xd0, 0xb7, 0x00}}, + {2, [3]byte{0xd0, 0xb8, 0x00}}, {2, [3]byte{0xd0, 0xb9, 0x00}}, + {2, [3]byte{0xd0, 0xba, 0x00}}, {2, [3]byte{0xd0, 0xbb, 0x00}}, + {2, [3]byte{0xd0, 0xbc, 0x00}}, {2, [3]byte{0xd0, 0xbd, 0x00}}, + {2, [3]byte{0xd0, 0xbe, 0x00}}, {2, [3]byte{0xd0, 0xbf, 0x00}}, + {2, [3]byte{0xd1, 0x80, 0x00}}, {2, [3]byte{0xd1, 0x81, 0x00}}, + {2, [3]byte{0xd1, 0x82, 0x00}}, {2, [3]byte{0xd1, 0x83, 0x00}}, + {2, [3]byte{0xd1, 0x84, 0x00}}, {2, [3]byte{0xd1, 0x85, 0x00}}, + {2, [3]byte{0xd1, 0x86, 0x00}}, {2, [3]byte{0xd1, 0x87, 0x00}}, + {2, [3]byte{0xd1, 0x88, 0x00}}, {2, [3]byte{0xd1, 0x89, 0x00}}, + {2, [3]byte{0xd1, 0x8a, 0x00}}, {2, [3]byte{0xd1, 0x8b, 0x00}}, + {2, [3]byte{0xd1, 0x8c, 0x00}}, {2, [3]byte{0xd1, 0x8d, 0x00}}, + {2, [3]byte{0xd1, 0x8e, 0x00}}, {3, [3]byte{0xe2, 0x82, 0xac}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xca0000a0, 0xa30000a3, 0xa40000a7, 0xa90000a9, 0xc70000ab, 0xc20000ac, 0xa80000ae, 0xa10000b0, + 0xb10000b1, 0xb50000b5, 0xa60000b6, 0xc80000bb, 0xd60000f7, 0xc4000192, 0xdd000401, 0xab000402, + 0xae000403, 0xb8000404, 0xc1000405, 0xa7000406, 0xba000407, 0xb7000408, 0xbc000409, 0xbe00040a, + 0xcb00040b, 0xcd00040c, 0xd800040e, 0xda00040f, 0x80000410, 0x81000411, 0x82000412, 0x83000413, + 0x84000414, 0x85000415, 0x86000416, 0x87000417, 0x88000418, 0x89000419, 0x8a00041a, 0x8b00041b, + 0x8c00041c, 0x8d00041d, 0x8e00041e, 0x8f00041f, 0x90000420, 0x91000421, 0x92000422, 0x93000423, + 0x94000424, 0x95000425, 0x96000426, 0x97000427, 0x98000428, 0x99000429, 0x9a00042a, 0x9b00042b, + 0x9c00042c, 0x9d00042d, 0x9e00042e, 0x9f00042f, 0xe0000430, 0xe1000431, 0xe2000432, 0xe3000433, + 0xe4000434, 0xe5000435, 0xe6000436, 0xe7000437, 0xe8000438, 0xe9000439, 0xea00043a, 0xeb00043b, + 0xec00043c, 0xed00043d, 0xee00043e, 0xef00043f, 0xf0000440, 0xf1000441, 0xf2000442, 0xf3000443, + 0xf4000444, 0xf5000445, 0xf6000446, 0xf7000447, 0xf8000448, 0xf9000449, 0xfa00044a, 0xfb00044b, + 0xfc00044c, 0xfd00044d, 0xfe00044e, 0xdf00044f, 0xde000451, 0xac000452, 0xaf000453, 0xb9000454, + 0xcf000455, 0xb4000456, 0xbb000457, 0xc0000458, 0xbd000459, 0xbf00045a, 0xcc00045b, 0xce00045c, + 0xd900045e, 0xdb00045f, 0xa2000490, 0xb6000491, 0xd0002013, 0xd1002014, 0xd4002018, 0xd5002019, + 0xd200201c, 0xd300201d, 0xd700201e, 0xa0002020, 0xa5002022, 0xc9002026, 0xff0020ac, 0xdc002116, + 0xaa002122, 0xc6002206, 0xc300221a, 0xb000221e, 0xc5002248, 0xad002260, 0xb2002264, 0xb3002265, + }, +} + +// Windows874 is the Windows 874 encoding. +var Windows874 *Charmap = &windows874 + +var windows874 = Charmap{ + name: "Windows 874", + mib: identifier.Windows874, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xac}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0xa6}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0x98}}, + {3, [3]byte{0xe2, 0x80, 0x99}}, {3, [3]byte{0xe2, 0x80, 0x9c}}, + {3, [3]byte{0xe2, 0x80, 0x9d}}, {3, [3]byte{0xe2, 0x80, 0xa2}}, + {3, [3]byte{0xe2, 0x80, 0x93}}, {3, [3]byte{0xe2, 0x80, 0x94}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {3, [3]byte{0xe0, 0xb8, 0x81}}, + {3, [3]byte{0xe0, 0xb8, 0x82}}, {3, [3]byte{0xe0, 0xb8, 0x83}}, + {3, [3]byte{0xe0, 0xb8, 0x84}}, {3, [3]byte{0xe0, 0xb8, 0x85}}, + {3, [3]byte{0xe0, 0xb8, 0x86}}, {3, [3]byte{0xe0, 0xb8, 0x87}}, + {3, [3]byte{0xe0, 0xb8, 0x88}}, {3, [3]byte{0xe0, 0xb8, 0x89}}, + {3, [3]byte{0xe0, 0xb8, 0x8a}}, {3, [3]byte{0xe0, 0xb8, 0x8b}}, + {3, [3]byte{0xe0, 0xb8, 0x8c}}, {3, [3]byte{0xe0, 0xb8, 0x8d}}, + {3, [3]byte{0xe0, 0xb8, 0x8e}}, {3, [3]byte{0xe0, 0xb8, 0x8f}}, + {3, [3]byte{0xe0, 0xb8, 0x90}}, {3, [3]byte{0xe0, 0xb8, 0x91}}, + {3, [3]byte{0xe0, 0xb8, 0x92}}, {3, [3]byte{0xe0, 0xb8, 0x93}}, + {3, [3]byte{0xe0, 0xb8, 0x94}}, {3, [3]byte{0xe0, 0xb8, 0x95}}, + {3, [3]byte{0xe0, 0xb8, 0x96}}, {3, [3]byte{0xe0, 0xb8, 0x97}}, + {3, [3]byte{0xe0, 0xb8, 0x98}}, {3, [3]byte{0xe0, 0xb8, 0x99}}, + {3, [3]byte{0xe0, 0xb8, 0x9a}}, {3, [3]byte{0xe0, 0xb8, 0x9b}}, + {3, [3]byte{0xe0, 0xb8, 0x9c}}, {3, [3]byte{0xe0, 0xb8, 0x9d}}, + {3, [3]byte{0xe0, 0xb8, 0x9e}}, {3, [3]byte{0xe0, 0xb8, 0x9f}}, + {3, [3]byte{0xe0, 0xb8, 0xa0}}, {3, [3]byte{0xe0, 0xb8, 0xa1}}, + {3, [3]byte{0xe0, 0xb8, 0xa2}}, {3, [3]byte{0xe0, 0xb8, 0xa3}}, + {3, [3]byte{0xe0, 0xb8, 0xa4}}, {3, [3]byte{0xe0, 0xb8, 0xa5}}, + {3, [3]byte{0xe0, 0xb8, 0xa6}}, {3, [3]byte{0xe0, 0xb8, 0xa7}}, + {3, [3]byte{0xe0, 0xb8, 0xa8}}, {3, [3]byte{0xe0, 0xb8, 0xa9}}, + {3, [3]byte{0xe0, 0xb8, 0xaa}}, {3, [3]byte{0xe0, 0xb8, 0xab}}, + {3, [3]byte{0xe0, 0xb8, 0xac}}, {3, [3]byte{0xe0, 0xb8, 0xad}}, + {3, [3]byte{0xe0, 0xb8, 0xae}}, {3, [3]byte{0xe0, 0xb8, 0xaf}}, + {3, [3]byte{0xe0, 0xb8, 0xb0}}, {3, [3]byte{0xe0, 0xb8, 0xb1}}, + {3, [3]byte{0xe0, 0xb8, 0xb2}}, {3, [3]byte{0xe0, 0xb8, 0xb3}}, + {3, [3]byte{0xe0, 0xb8, 0xb4}}, {3, [3]byte{0xe0, 0xb8, 0xb5}}, + {3, [3]byte{0xe0, 0xb8, 0xb6}}, {3, [3]byte{0xe0, 0xb8, 0xb7}}, + {3, [3]byte{0xe0, 0xb8, 0xb8}}, {3, [3]byte{0xe0, 0xb8, 0xb9}}, + {3, [3]byte{0xe0, 0xb8, 0xba}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe0, 0xb8, 0xbf}}, + {3, [3]byte{0xe0, 0xb9, 0x80}}, {3, [3]byte{0xe0, 0xb9, 0x81}}, + {3, [3]byte{0xe0, 0xb9, 0x82}}, {3, [3]byte{0xe0, 0xb9, 0x83}}, + {3, [3]byte{0xe0, 0xb9, 0x84}}, {3, [3]byte{0xe0, 0xb9, 0x85}}, + {3, [3]byte{0xe0, 0xb9, 0x86}}, {3, [3]byte{0xe0, 0xb9, 0x87}}, + {3, [3]byte{0xe0, 0xb9, 0x88}}, {3, [3]byte{0xe0, 0xb9, 0x89}}, + {3, [3]byte{0xe0, 0xb9, 0x8a}}, {3, [3]byte{0xe0, 0xb9, 0x8b}}, + {3, [3]byte{0xe0, 0xb9, 0x8c}}, {3, [3]byte{0xe0, 0xb9, 0x8d}}, + {3, [3]byte{0xe0, 0xb9, 0x8e}}, {3, [3]byte{0xe0, 0xb9, 0x8f}}, + {3, [3]byte{0xe0, 0xb9, 0x90}}, {3, [3]byte{0xe0, 0xb9, 0x91}}, + {3, [3]byte{0xe0, 0xb9, 0x92}}, {3, [3]byte{0xe0, 0xb9, 0x93}}, + {3, [3]byte{0xe0, 0xb9, 0x94}}, {3, [3]byte{0xe0, 0xb9, 0x95}}, + {3, [3]byte{0xe0, 0xb9, 0x96}}, {3, [3]byte{0xe0, 0xb9, 0x97}}, + {3, [3]byte{0xe0, 0xb9, 0x98}}, {3, [3]byte{0xe0, 0xb9, 0x99}}, + {3, [3]byte{0xe0, 0xb9, 0x9a}}, {3, [3]byte{0xe0, 0xb9, 0x9b}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa1000e01, 0xa2000e02, 0xa3000e03, 0xa4000e04, 0xa5000e05, 0xa6000e06, 0xa7000e07, + 0xa8000e08, 0xa9000e09, 0xaa000e0a, 0xab000e0b, 0xac000e0c, 0xad000e0d, 0xae000e0e, 0xaf000e0f, + 0xb0000e10, 0xb1000e11, 0xb2000e12, 0xb3000e13, 0xb4000e14, 0xb5000e15, 0xb6000e16, 0xb7000e17, + 0xb8000e18, 0xb9000e19, 0xba000e1a, 0xbb000e1b, 0xbc000e1c, 0xbd000e1d, 0xbe000e1e, 0xbf000e1f, + 0xc0000e20, 0xc1000e21, 0xc2000e22, 0xc3000e23, 0xc4000e24, 0xc5000e25, 0xc6000e26, 0xc7000e27, + 0xc8000e28, 0xc9000e29, 0xca000e2a, 0xcb000e2b, 0xcc000e2c, 0xcd000e2d, 0xce000e2e, 0xcf000e2f, + 0xd0000e30, 0xd1000e31, 0xd2000e32, 0xd3000e33, 0xd4000e34, 0xd5000e35, 0xd6000e36, 0xd7000e37, + 0xd8000e38, 0xd9000e39, 0xda000e3a, 0xdf000e3f, 0xe0000e40, 0xe1000e41, 0xe2000e42, 0xe3000e43, + 0xe4000e44, 0xe5000e45, 0xe6000e46, 0xe7000e47, 0xe8000e48, 0xe9000e49, 0xea000e4a, 0xeb000e4b, + 0xec000e4c, 0xed000e4d, 0xee000e4e, 0xef000e4f, 0xf0000e50, 0xf1000e51, 0xf2000e52, 0xf3000e53, + 0xf4000e54, 0xf5000e55, 0xf6000e56, 0xf7000e57, 0xf8000e58, 0xf9000e59, 0xfa000e5a, 0xfb000e5b, + 0x96002013, 0x97002014, 0x91002018, 0x92002019, 0x9300201c, 0x9400201d, 0x95002022, 0x85002026, + 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, + 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, + 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, + 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, 0x800020ac, + }, +} + +// Windows1250 is the Windows 1250 encoding. +var Windows1250 *Charmap = &windows1250 + +var windows1250 = Charmap{ + name: "Windows 1250", + mib: identifier.Windows1250, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xac}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xe2, 0x80, 0x9a}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xe2, 0x80, 0x9e}}, {3, [3]byte{0xe2, 0x80, 0xa6}}, + {3, [3]byte{0xe2, 0x80, 0xa0}}, {3, [3]byte{0xe2, 0x80, 0xa1}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0xb0}}, + {2, [3]byte{0xc5, 0xa0, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xb9}}, + {2, [3]byte{0xc5, 0x9a, 0x00}}, {2, [3]byte{0xc5, 0xa4, 0x00}}, + {2, [3]byte{0xc5, 0xbd, 0x00}}, {2, [3]byte{0xc5, 0xb9, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0x98}}, + {3, [3]byte{0xe2, 0x80, 0x99}}, {3, [3]byte{0xe2, 0x80, 0x9c}}, + {3, [3]byte{0xe2, 0x80, 0x9d}}, {3, [3]byte{0xe2, 0x80, 0xa2}}, + {3, [3]byte{0xe2, 0x80, 0x93}}, {3, [3]byte{0xe2, 0x80, 0x94}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x84, 0xa2}}, + {2, [3]byte{0xc5, 0xa1, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xba}}, + {2, [3]byte{0xc5, 0x9b, 0x00}}, {2, [3]byte{0xc5, 0xa5, 0x00}}, + {2, [3]byte{0xc5, 0xbe, 0x00}}, {2, [3]byte{0xc5, 0xba, 0x00}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xcb, 0x87, 0x00}}, + {2, [3]byte{0xcb, 0x98, 0x00}}, {2, [3]byte{0xc5, 0x81, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {2, [3]byte{0xc4, 0x84, 0x00}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xc5, 0x9e, 0x00}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xc5, 0xbb, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xcb, 0x9b, 0x00}}, {2, [3]byte{0xc5, 0x82, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc2, 0xb8, 0x00}}, {2, [3]byte{0xc4, 0x85, 0x00}}, + {2, [3]byte{0xc5, 0x9f, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc4, 0xbd, 0x00}}, {2, [3]byte{0xcb, 0x9d, 0x00}}, + {2, [3]byte{0xc4, 0xbe, 0x00}}, {2, [3]byte{0xc5, 0xbc, 0x00}}, + {2, [3]byte{0xc5, 0x94, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc4, 0x82, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc4, 0xb9, 0x00}}, + {2, [3]byte{0xc4, 0x86, 0x00}}, {2, [3]byte{0xc3, 0x87, 0x00}}, + {2, [3]byte{0xc4, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc4, 0x98, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc4, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc4, 0x8e, 0x00}}, + {2, [3]byte{0xc4, 0x90, 0x00}}, {2, [3]byte{0xc5, 0x83, 0x00}}, + {2, [3]byte{0xc5, 0x87, 0x00}}, {2, [3]byte{0xc3, 0x93, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc5, 0x90, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {2, [3]byte{0xc5, 0x98, 0x00}}, {2, [3]byte{0xc5, 0xae, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc5, 0xb0, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0x9d, 0x00}}, + {2, [3]byte{0xc5, 0xa2, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc5, 0x95, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xc4, 0x83, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc4, 0xba, 0x00}}, + {2, [3]byte{0xc4, 0x87, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc4, 0x8d, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc4, 0x99, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc4, 0x9b, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc4, 0x8f, 0x00}}, + {2, [3]byte{0xc4, 0x91, 0x00}}, {2, [3]byte{0xc5, 0x84, 0x00}}, + {2, [3]byte{0xc5, 0x88, 0x00}}, {2, [3]byte{0xc3, 0xb3, 0x00}}, + {2, [3]byte{0xc3, 0xb4, 0x00}}, {2, [3]byte{0xc5, 0x91, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {2, [3]byte{0xc5, 0x99, 0x00}}, {2, [3]byte{0xc5, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc5, 0xb1, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc3, 0xbd, 0x00}}, + {2, [3]byte{0xc5, 0xa3, 0x00}}, {2, [3]byte{0xcb, 0x99, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa40000a4, 0xa60000a6, 0xa70000a7, 0xa80000a8, 0xa90000a9, 0xab0000ab, 0xac0000ac, + 0xad0000ad, 0xae0000ae, 0xb00000b0, 0xb10000b1, 0xb40000b4, 0xb50000b5, 0xb60000b6, 0xb70000b7, + 0xb80000b8, 0xbb0000bb, 0xc10000c1, 0xc20000c2, 0xc40000c4, 0xc70000c7, 0xc90000c9, 0xcb0000cb, + 0xcd0000cd, 0xce0000ce, 0xd30000d3, 0xd40000d4, 0xd60000d6, 0xd70000d7, 0xda0000da, 0xdc0000dc, + 0xdd0000dd, 0xdf0000df, 0xe10000e1, 0xe20000e2, 0xe40000e4, 0xe70000e7, 0xe90000e9, 0xeb0000eb, + 0xed0000ed, 0xee0000ee, 0xf30000f3, 0xf40000f4, 0xf60000f6, 0xf70000f7, 0xfa0000fa, 0xfc0000fc, + 0xfd0000fd, 0xc3000102, 0xe3000103, 0xa5000104, 0xb9000105, 0xc6000106, 0xe6000107, 0xc800010c, + 0xe800010d, 0xcf00010e, 0xef00010f, 0xd0000110, 0xf0000111, 0xca000118, 0xea000119, 0xcc00011a, + 0xec00011b, 0xc5000139, 0xe500013a, 0xbc00013d, 0xbe00013e, 0xa3000141, 0xb3000142, 0xd1000143, + 0xf1000144, 0xd2000147, 0xf2000148, 0xd5000150, 0xf5000151, 0xc0000154, 0xe0000155, 0xd8000158, + 0xf8000159, 0x8c00015a, 0x9c00015b, 0xaa00015e, 0xba00015f, 0x8a000160, 0x9a000161, 0xde000162, + 0xfe000163, 0x8d000164, 0x9d000165, 0xd900016e, 0xf900016f, 0xdb000170, 0xfb000171, 0x8f000179, + 0x9f00017a, 0xaf00017b, 0xbf00017c, 0x8e00017d, 0x9e00017e, 0xa10002c7, 0xa20002d8, 0xff0002d9, + 0xb20002db, 0xbd0002dd, 0x96002013, 0x97002014, 0x91002018, 0x92002019, 0x8200201a, 0x9300201c, + 0x9400201d, 0x8400201e, 0x86002020, 0x87002021, 0x95002022, 0x85002026, 0x89002030, 0x8b002039, + 0x9b00203a, 0x800020ac, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, + }, +} + +// Windows1251 is the Windows 1251 encoding. +var Windows1251 *Charmap = &windows1251 + +var windows1251 = Charmap{ + name: "Windows 1251", + mib: identifier.Windows1251, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {2, [3]byte{0xd0, 0x82, 0x00}}, {2, [3]byte{0xd0, 0x83, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0x9a}}, {2, [3]byte{0xd1, 0x93, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0x9e}}, {3, [3]byte{0xe2, 0x80, 0xa6}}, + {3, [3]byte{0xe2, 0x80, 0xa0}}, {3, [3]byte{0xe2, 0x80, 0xa1}}, + {3, [3]byte{0xe2, 0x82, 0xac}}, {3, [3]byte{0xe2, 0x80, 0xb0}}, + {2, [3]byte{0xd0, 0x89, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xb9}}, + {2, [3]byte{0xd0, 0x8a, 0x00}}, {2, [3]byte{0xd0, 0x8c, 0x00}}, + {2, [3]byte{0xd0, 0x8b, 0x00}}, {2, [3]byte{0xd0, 0x8f, 0x00}}, + {2, [3]byte{0xd1, 0x92, 0x00}}, {3, [3]byte{0xe2, 0x80, 0x98}}, + {3, [3]byte{0xe2, 0x80, 0x99}}, {3, [3]byte{0xe2, 0x80, 0x9c}}, + {3, [3]byte{0xe2, 0x80, 0x9d}}, {3, [3]byte{0xe2, 0x80, 0xa2}}, + {3, [3]byte{0xe2, 0x80, 0x93}}, {3, [3]byte{0xe2, 0x80, 0x94}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x84, 0xa2}}, + {2, [3]byte{0xd1, 0x99, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xba}}, + {2, [3]byte{0xd1, 0x9a, 0x00}}, {2, [3]byte{0xd1, 0x9c, 0x00}}, + {2, [3]byte{0xd1, 0x9b, 0x00}}, {2, [3]byte{0xd1, 0x9f, 0x00}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xd0, 0x8e, 0x00}}, + {2, [3]byte{0xd1, 0x9e, 0x00}}, {2, [3]byte{0xd0, 0x88, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {2, [3]byte{0xd2, 0x90, 0x00}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xd0, 0x81, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xd0, 0x84, 0x00}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xd0, 0x87, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xd0, 0x86, 0x00}}, {2, [3]byte{0xd1, 0x96, 0x00}}, + {2, [3]byte{0xd2, 0x91, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xd1, 0x91, 0x00}}, {3, [3]byte{0xe2, 0x84, 0x96}}, + {2, [3]byte{0xd1, 0x94, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xd1, 0x98, 0x00}}, {2, [3]byte{0xd0, 0x85, 0x00}}, + {2, [3]byte{0xd1, 0x95, 0x00}}, {2, [3]byte{0xd1, 0x97, 0x00}}, + {2, [3]byte{0xd0, 0x90, 0x00}}, {2, [3]byte{0xd0, 0x91, 0x00}}, + {2, [3]byte{0xd0, 0x92, 0x00}}, {2, [3]byte{0xd0, 0x93, 0x00}}, + {2, [3]byte{0xd0, 0x94, 0x00}}, {2, [3]byte{0xd0, 0x95, 0x00}}, + {2, [3]byte{0xd0, 0x96, 0x00}}, {2, [3]byte{0xd0, 0x97, 0x00}}, + {2, [3]byte{0xd0, 0x98, 0x00}}, {2, [3]byte{0xd0, 0x99, 0x00}}, + {2, [3]byte{0xd0, 0x9a, 0x00}}, {2, [3]byte{0xd0, 0x9b, 0x00}}, + {2, [3]byte{0xd0, 0x9c, 0x00}}, {2, [3]byte{0xd0, 0x9d, 0x00}}, + {2, [3]byte{0xd0, 0x9e, 0x00}}, {2, [3]byte{0xd0, 0x9f, 0x00}}, + {2, [3]byte{0xd0, 0xa0, 0x00}}, {2, [3]byte{0xd0, 0xa1, 0x00}}, + {2, [3]byte{0xd0, 0xa2, 0x00}}, {2, [3]byte{0xd0, 0xa3, 0x00}}, + {2, [3]byte{0xd0, 0xa4, 0x00}}, {2, [3]byte{0xd0, 0xa5, 0x00}}, + {2, [3]byte{0xd0, 0xa6, 0x00}}, {2, [3]byte{0xd0, 0xa7, 0x00}}, + {2, [3]byte{0xd0, 0xa8, 0x00}}, {2, [3]byte{0xd0, 0xa9, 0x00}}, + {2, [3]byte{0xd0, 0xaa, 0x00}}, {2, [3]byte{0xd0, 0xab, 0x00}}, + {2, [3]byte{0xd0, 0xac, 0x00}}, {2, [3]byte{0xd0, 0xad, 0x00}}, + {2, [3]byte{0xd0, 0xae, 0x00}}, {2, [3]byte{0xd0, 0xaf, 0x00}}, + {2, [3]byte{0xd0, 0xb0, 0x00}}, {2, [3]byte{0xd0, 0xb1, 0x00}}, + {2, [3]byte{0xd0, 0xb2, 0x00}}, {2, [3]byte{0xd0, 0xb3, 0x00}}, + {2, [3]byte{0xd0, 0xb4, 0x00}}, {2, [3]byte{0xd0, 0xb5, 0x00}}, + {2, [3]byte{0xd0, 0xb6, 0x00}}, {2, [3]byte{0xd0, 0xb7, 0x00}}, + {2, [3]byte{0xd0, 0xb8, 0x00}}, {2, [3]byte{0xd0, 0xb9, 0x00}}, + {2, [3]byte{0xd0, 0xba, 0x00}}, {2, [3]byte{0xd0, 0xbb, 0x00}}, + {2, [3]byte{0xd0, 0xbc, 0x00}}, {2, [3]byte{0xd0, 0xbd, 0x00}}, + {2, [3]byte{0xd0, 0xbe, 0x00}}, {2, [3]byte{0xd0, 0xbf, 0x00}}, + {2, [3]byte{0xd1, 0x80, 0x00}}, {2, [3]byte{0xd1, 0x81, 0x00}}, + {2, [3]byte{0xd1, 0x82, 0x00}}, {2, [3]byte{0xd1, 0x83, 0x00}}, + {2, [3]byte{0xd1, 0x84, 0x00}}, {2, [3]byte{0xd1, 0x85, 0x00}}, + {2, [3]byte{0xd1, 0x86, 0x00}}, {2, [3]byte{0xd1, 0x87, 0x00}}, + {2, [3]byte{0xd1, 0x88, 0x00}}, {2, [3]byte{0xd1, 0x89, 0x00}}, + {2, [3]byte{0xd1, 0x8a, 0x00}}, {2, [3]byte{0xd1, 0x8b, 0x00}}, + {2, [3]byte{0xd1, 0x8c, 0x00}}, {2, [3]byte{0xd1, 0x8d, 0x00}}, + {2, [3]byte{0xd1, 0x8e, 0x00}}, {2, [3]byte{0xd1, 0x8f, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa40000a4, 0xa60000a6, 0xa70000a7, 0xa90000a9, 0xab0000ab, 0xac0000ac, 0xad0000ad, + 0xae0000ae, 0xb00000b0, 0xb10000b1, 0xb50000b5, 0xb60000b6, 0xb70000b7, 0xbb0000bb, 0xa8000401, + 0x80000402, 0x81000403, 0xaa000404, 0xbd000405, 0xb2000406, 0xaf000407, 0xa3000408, 0x8a000409, + 0x8c00040a, 0x8e00040b, 0x8d00040c, 0xa100040e, 0x8f00040f, 0xc0000410, 0xc1000411, 0xc2000412, + 0xc3000413, 0xc4000414, 0xc5000415, 0xc6000416, 0xc7000417, 0xc8000418, 0xc9000419, 0xca00041a, + 0xcb00041b, 0xcc00041c, 0xcd00041d, 0xce00041e, 0xcf00041f, 0xd0000420, 0xd1000421, 0xd2000422, + 0xd3000423, 0xd4000424, 0xd5000425, 0xd6000426, 0xd7000427, 0xd8000428, 0xd9000429, 0xda00042a, + 0xdb00042b, 0xdc00042c, 0xdd00042d, 0xde00042e, 0xdf00042f, 0xe0000430, 0xe1000431, 0xe2000432, + 0xe3000433, 0xe4000434, 0xe5000435, 0xe6000436, 0xe7000437, 0xe8000438, 0xe9000439, 0xea00043a, + 0xeb00043b, 0xec00043c, 0xed00043d, 0xee00043e, 0xef00043f, 0xf0000440, 0xf1000441, 0xf2000442, + 0xf3000443, 0xf4000444, 0xf5000445, 0xf6000446, 0xf7000447, 0xf8000448, 0xf9000449, 0xfa00044a, + 0xfb00044b, 0xfc00044c, 0xfd00044d, 0xfe00044e, 0xff00044f, 0xb8000451, 0x90000452, 0x83000453, + 0xba000454, 0xbe000455, 0xb3000456, 0xbf000457, 0xbc000458, 0x9a000459, 0x9c00045a, 0x9e00045b, + 0x9d00045c, 0xa200045e, 0x9f00045f, 0xa5000490, 0xb4000491, 0x96002013, 0x97002014, 0x91002018, + 0x92002019, 0x8200201a, 0x9300201c, 0x9400201d, 0x8400201e, 0x86002020, 0x87002021, 0x95002022, + 0x85002026, 0x89002030, 0x8b002039, 0x9b00203a, 0x880020ac, 0xb9002116, 0x99002122, 0x99002122, + }, +} + +// Windows1252 is the Windows 1252 encoding. +var Windows1252 *Charmap = &windows1252 + +var windows1252 = Charmap{ + name: "Windows 1252", + mib: identifier.Windows1252, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xac}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xe2, 0x80, 0x9a}}, {2, [3]byte{0xc6, 0x92, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0x9e}}, {3, [3]byte{0xe2, 0x80, 0xa6}}, + {3, [3]byte{0xe2, 0x80, 0xa0}}, {3, [3]byte{0xe2, 0x80, 0xa1}}, + {2, [3]byte{0xcb, 0x86, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xb0}}, + {2, [3]byte{0xc5, 0xa0, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xb9}}, + {2, [3]byte{0xc5, 0x92, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc5, 0xbd, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0x98}}, + {3, [3]byte{0xe2, 0x80, 0x99}}, {3, [3]byte{0xe2, 0x80, 0x9c}}, + {3, [3]byte{0xe2, 0x80, 0x9d}}, {3, [3]byte{0xe2, 0x80, 0xa2}}, + {3, [3]byte{0xe2, 0x80, 0x93}}, {3, [3]byte{0xe2, 0x80, 0x94}}, + {2, [3]byte{0xcb, 0x9c, 0x00}}, {3, [3]byte{0xe2, 0x84, 0xa2}}, + {2, [3]byte{0xc5, 0xa1, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xba}}, + {2, [3]byte{0xc5, 0x93, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc5, 0xbe, 0x00}}, {2, [3]byte{0xc5, 0xb8, 0x00}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xc2, 0xa1, 0x00}}, + {2, [3]byte{0xc2, 0xa2, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {2, [3]byte{0xc2, 0xa5, 0x00}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xc2, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xc2, 0xaf, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc2, 0xb3, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc2, 0xb8, 0x00}}, {2, [3]byte{0xc2, 0xb9, 0x00}}, + {2, [3]byte{0xc2, 0xba, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbe, 0x00}}, {2, [3]byte{0xc2, 0xbf, 0x00}}, + {2, [3]byte{0xc3, 0x80, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc3, 0x83, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc3, 0x87, 0x00}}, + {2, [3]byte{0xc3, 0x88, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc3, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc3, 0x8f, 0x00}}, + {2, [3]byte{0xc3, 0x90, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc3, 0x92, 0x00}}, {2, [3]byte{0xc3, 0x93, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {2, [3]byte{0xc3, 0x98, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0x9b, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc3, 0x9d, 0x00}}, + {2, [3]byte{0xc3, 0x9e, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc3, 0xa0, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xc3, 0xa3, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa5, 0x00}}, + {2, [3]byte{0xc3, 0xa6, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xac, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc3, 0xb0, 0x00}}, {2, [3]byte{0xc3, 0xb1, 0x00}}, + {2, [3]byte{0xc3, 0xb2, 0x00}}, {2, [3]byte{0xc3, 0xb3, 0x00}}, + {2, [3]byte{0xc3, 0xb4, 0x00}}, {2, [3]byte{0xc3, 0xb5, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {2, [3]byte{0xc3, 0xb8, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc3, 0xbd, 0x00}}, + {2, [3]byte{0xc3, 0xbe, 0x00}}, {2, [3]byte{0xc3, 0xbf, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa10000a1, 0xa20000a2, 0xa30000a3, 0xa40000a4, 0xa50000a5, 0xa60000a6, 0xa70000a7, + 0xa80000a8, 0xa90000a9, 0xaa0000aa, 0xab0000ab, 0xac0000ac, 0xad0000ad, 0xae0000ae, 0xaf0000af, + 0xb00000b0, 0xb10000b1, 0xb20000b2, 0xb30000b3, 0xb40000b4, 0xb50000b5, 0xb60000b6, 0xb70000b7, + 0xb80000b8, 0xb90000b9, 0xba0000ba, 0xbb0000bb, 0xbc0000bc, 0xbd0000bd, 0xbe0000be, 0xbf0000bf, + 0xc00000c0, 0xc10000c1, 0xc20000c2, 0xc30000c3, 0xc40000c4, 0xc50000c5, 0xc60000c6, 0xc70000c7, + 0xc80000c8, 0xc90000c9, 0xca0000ca, 0xcb0000cb, 0xcc0000cc, 0xcd0000cd, 0xce0000ce, 0xcf0000cf, + 0xd00000d0, 0xd10000d1, 0xd20000d2, 0xd30000d3, 0xd40000d4, 0xd50000d5, 0xd60000d6, 0xd70000d7, + 0xd80000d8, 0xd90000d9, 0xda0000da, 0xdb0000db, 0xdc0000dc, 0xdd0000dd, 0xde0000de, 0xdf0000df, + 0xe00000e0, 0xe10000e1, 0xe20000e2, 0xe30000e3, 0xe40000e4, 0xe50000e5, 0xe60000e6, 0xe70000e7, + 0xe80000e8, 0xe90000e9, 0xea0000ea, 0xeb0000eb, 0xec0000ec, 0xed0000ed, 0xee0000ee, 0xef0000ef, + 0xf00000f0, 0xf10000f1, 0xf20000f2, 0xf30000f3, 0xf40000f4, 0xf50000f5, 0xf60000f6, 0xf70000f7, + 0xf80000f8, 0xf90000f9, 0xfa0000fa, 0xfb0000fb, 0xfc0000fc, 0xfd0000fd, 0xfe0000fe, 0xff0000ff, + 0x8c000152, 0x9c000153, 0x8a000160, 0x9a000161, 0x9f000178, 0x8e00017d, 0x9e00017e, 0x83000192, + 0x880002c6, 0x980002dc, 0x96002013, 0x97002014, 0x91002018, 0x92002019, 0x8200201a, 0x9300201c, + 0x9400201d, 0x8400201e, 0x86002020, 0x87002021, 0x95002022, 0x85002026, 0x89002030, 0x8b002039, + 0x9b00203a, 0x800020ac, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, + }, +} + +// Windows1253 is the Windows 1253 encoding. +var Windows1253 *Charmap = &windows1253 + +var windows1253 = Charmap{ + name: "Windows 1253", + mib: identifier.Windows1253, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xac}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xe2, 0x80, 0x9a}}, {2, [3]byte{0xc6, 0x92, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0x9e}}, {3, [3]byte{0xe2, 0x80, 0xa6}}, + {3, [3]byte{0xe2, 0x80, 0xa0}}, {3, [3]byte{0xe2, 0x80, 0xa1}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0xb0}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0xb9}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0x98}}, + {3, [3]byte{0xe2, 0x80, 0x99}}, {3, [3]byte{0xe2, 0x80, 0x9c}}, + {3, [3]byte{0xe2, 0x80, 0x9d}}, {3, [3]byte{0xe2, 0x80, 0xa2}}, + {3, [3]byte{0xe2, 0x80, 0x93}}, {3, [3]byte{0xe2, 0x80, 0x94}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x84, 0xa2}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0xba}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xce, 0x85, 0x00}}, + {2, [3]byte{0xce, 0x86, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {2, [3]byte{0xc2, 0xa5, 0x00}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {3, [3]byte{0xe2, 0x80, 0x95}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc2, 0xb3, 0x00}}, + {2, [3]byte{0xce, 0x84, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xce, 0x88, 0x00}}, {2, [3]byte{0xce, 0x89, 0x00}}, + {2, [3]byte{0xce, 0x8a, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xce, 0x8c, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xce, 0x8e, 0x00}}, {2, [3]byte{0xce, 0x8f, 0x00}}, + {2, [3]byte{0xce, 0x90, 0x00}}, {2, [3]byte{0xce, 0x91, 0x00}}, + {2, [3]byte{0xce, 0x92, 0x00}}, {2, [3]byte{0xce, 0x93, 0x00}}, + {2, [3]byte{0xce, 0x94, 0x00}}, {2, [3]byte{0xce, 0x95, 0x00}}, + {2, [3]byte{0xce, 0x96, 0x00}}, {2, [3]byte{0xce, 0x97, 0x00}}, + {2, [3]byte{0xce, 0x98, 0x00}}, {2, [3]byte{0xce, 0x99, 0x00}}, + {2, [3]byte{0xce, 0x9a, 0x00}}, {2, [3]byte{0xce, 0x9b, 0x00}}, + {2, [3]byte{0xce, 0x9c, 0x00}}, {2, [3]byte{0xce, 0x9d, 0x00}}, + {2, [3]byte{0xce, 0x9e, 0x00}}, {2, [3]byte{0xce, 0x9f, 0x00}}, + {2, [3]byte{0xce, 0xa0, 0x00}}, {2, [3]byte{0xce, 0xa1, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {2, [3]byte{0xce, 0xa3, 0x00}}, + {2, [3]byte{0xce, 0xa4, 0x00}}, {2, [3]byte{0xce, 0xa5, 0x00}}, + {2, [3]byte{0xce, 0xa6, 0x00}}, {2, [3]byte{0xce, 0xa7, 0x00}}, + {2, [3]byte{0xce, 0xa8, 0x00}}, {2, [3]byte{0xce, 0xa9, 0x00}}, + {2, [3]byte{0xce, 0xaa, 0x00}}, {2, [3]byte{0xce, 0xab, 0x00}}, + {2, [3]byte{0xce, 0xac, 0x00}}, {2, [3]byte{0xce, 0xad, 0x00}}, + {2, [3]byte{0xce, 0xae, 0x00}}, {2, [3]byte{0xce, 0xaf, 0x00}}, + {2, [3]byte{0xce, 0xb0, 0x00}}, {2, [3]byte{0xce, 0xb1, 0x00}}, + {2, [3]byte{0xce, 0xb2, 0x00}}, {2, [3]byte{0xce, 0xb3, 0x00}}, + {2, [3]byte{0xce, 0xb4, 0x00}}, {2, [3]byte{0xce, 0xb5, 0x00}}, + {2, [3]byte{0xce, 0xb6, 0x00}}, {2, [3]byte{0xce, 0xb7, 0x00}}, + {2, [3]byte{0xce, 0xb8, 0x00}}, {2, [3]byte{0xce, 0xb9, 0x00}}, + {2, [3]byte{0xce, 0xba, 0x00}}, {2, [3]byte{0xce, 0xbb, 0x00}}, + {2, [3]byte{0xce, 0xbc, 0x00}}, {2, [3]byte{0xce, 0xbd, 0x00}}, + {2, [3]byte{0xce, 0xbe, 0x00}}, {2, [3]byte{0xce, 0xbf, 0x00}}, + {2, [3]byte{0xcf, 0x80, 0x00}}, {2, [3]byte{0xcf, 0x81, 0x00}}, + {2, [3]byte{0xcf, 0x82, 0x00}}, {2, [3]byte{0xcf, 0x83, 0x00}}, + {2, [3]byte{0xcf, 0x84, 0x00}}, {2, [3]byte{0xcf, 0x85, 0x00}}, + {2, [3]byte{0xcf, 0x86, 0x00}}, {2, [3]byte{0xcf, 0x87, 0x00}}, + {2, [3]byte{0xcf, 0x88, 0x00}}, {2, [3]byte{0xcf, 0x89, 0x00}}, + {2, [3]byte{0xcf, 0x8a, 0x00}}, {2, [3]byte{0xcf, 0x8b, 0x00}}, + {2, [3]byte{0xcf, 0x8c, 0x00}}, {2, [3]byte{0xcf, 0x8d, 0x00}}, + {2, [3]byte{0xcf, 0x8e, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa30000a3, 0xa40000a4, 0xa50000a5, 0xa60000a6, 0xa70000a7, 0xa80000a8, 0xa90000a9, + 0xab0000ab, 0xac0000ac, 0xad0000ad, 0xae0000ae, 0xb00000b0, 0xb10000b1, 0xb20000b2, 0xb30000b3, + 0xb50000b5, 0xb60000b6, 0xb70000b7, 0xbb0000bb, 0xbd0000bd, 0x83000192, 0xb4000384, 0xa1000385, + 0xa2000386, 0xb8000388, 0xb9000389, 0xba00038a, 0xbc00038c, 0xbe00038e, 0xbf00038f, 0xc0000390, + 0xc1000391, 0xc2000392, 0xc3000393, 0xc4000394, 0xc5000395, 0xc6000396, 0xc7000397, 0xc8000398, + 0xc9000399, 0xca00039a, 0xcb00039b, 0xcc00039c, 0xcd00039d, 0xce00039e, 0xcf00039f, 0xd00003a0, + 0xd10003a1, 0xd30003a3, 0xd40003a4, 0xd50003a5, 0xd60003a6, 0xd70003a7, 0xd80003a8, 0xd90003a9, + 0xda0003aa, 0xdb0003ab, 0xdc0003ac, 0xdd0003ad, 0xde0003ae, 0xdf0003af, 0xe00003b0, 0xe10003b1, + 0xe20003b2, 0xe30003b3, 0xe40003b4, 0xe50003b5, 0xe60003b6, 0xe70003b7, 0xe80003b8, 0xe90003b9, + 0xea0003ba, 0xeb0003bb, 0xec0003bc, 0xed0003bd, 0xee0003be, 0xef0003bf, 0xf00003c0, 0xf10003c1, + 0xf20003c2, 0xf30003c3, 0xf40003c4, 0xf50003c5, 0xf60003c6, 0xf70003c7, 0xf80003c8, 0xf90003c9, + 0xfa0003ca, 0xfb0003cb, 0xfc0003cc, 0xfd0003cd, 0xfe0003ce, 0x96002013, 0x97002014, 0xaf002015, + 0x91002018, 0x92002019, 0x8200201a, 0x9300201c, 0x9400201d, 0x8400201e, 0x86002020, 0x87002021, + 0x95002022, 0x85002026, 0x89002030, 0x8b002039, 0x9b00203a, 0x800020ac, 0x99002122, 0x99002122, + 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, + 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, + }, +} + +// Windows1254 is the Windows 1254 encoding. +var Windows1254 *Charmap = &windows1254 + +var windows1254 = Charmap{ + name: "Windows 1254", + mib: identifier.Windows1254, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xac}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xe2, 0x80, 0x9a}}, {2, [3]byte{0xc6, 0x92, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0x9e}}, {3, [3]byte{0xe2, 0x80, 0xa6}}, + {3, [3]byte{0xe2, 0x80, 0xa0}}, {3, [3]byte{0xe2, 0x80, 0xa1}}, + {2, [3]byte{0xcb, 0x86, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xb0}}, + {2, [3]byte{0xc5, 0xa0, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xb9}}, + {2, [3]byte{0xc5, 0x92, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0x98}}, + {3, [3]byte{0xe2, 0x80, 0x99}}, {3, [3]byte{0xe2, 0x80, 0x9c}}, + {3, [3]byte{0xe2, 0x80, 0x9d}}, {3, [3]byte{0xe2, 0x80, 0xa2}}, + {3, [3]byte{0xe2, 0x80, 0x93}}, {3, [3]byte{0xe2, 0x80, 0x94}}, + {2, [3]byte{0xcb, 0x9c, 0x00}}, {3, [3]byte{0xe2, 0x84, 0xa2}}, + {2, [3]byte{0xc5, 0xa1, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xba}}, + {2, [3]byte{0xc5, 0x93, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {2, [3]byte{0xc5, 0xb8, 0x00}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xc2, 0xa1, 0x00}}, + {2, [3]byte{0xc2, 0xa2, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {2, [3]byte{0xc2, 0xa5, 0x00}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xc2, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xc2, 0xaf, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc2, 0xb3, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc2, 0xb8, 0x00}}, {2, [3]byte{0xc2, 0xb9, 0x00}}, + {2, [3]byte{0xc2, 0xba, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbe, 0x00}}, {2, [3]byte{0xc2, 0xbf, 0x00}}, + {2, [3]byte{0xc3, 0x80, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc3, 0x83, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc3, 0x87, 0x00}}, + {2, [3]byte{0xc3, 0x88, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xc3, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc3, 0x8f, 0x00}}, + {2, [3]byte{0xc4, 0x9e, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xc3, 0x92, 0x00}}, {2, [3]byte{0xc3, 0x93, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {2, [3]byte{0xc3, 0x98, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0x9b, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc4, 0xb0, 0x00}}, + {2, [3]byte{0xc5, 0x9e, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc3, 0xa0, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xc3, 0xa3, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa5, 0x00}}, + {2, [3]byte{0xc3, 0xa6, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xac, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc4, 0x9f, 0x00}}, {2, [3]byte{0xc3, 0xb1, 0x00}}, + {2, [3]byte{0xc3, 0xb2, 0x00}}, {2, [3]byte{0xc3, 0xb3, 0x00}}, + {2, [3]byte{0xc3, 0xb4, 0x00}}, {2, [3]byte{0xc3, 0xb5, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {2, [3]byte{0xc3, 0xb8, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc4, 0xb1, 0x00}}, + {2, [3]byte{0xc5, 0x9f, 0x00}}, {2, [3]byte{0xc3, 0xbf, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa10000a1, 0xa20000a2, 0xa30000a3, 0xa40000a4, 0xa50000a5, 0xa60000a6, 0xa70000a7, + 0xa80000a8, 0xa90000a9, 0xaa0000aa, 0xab0000ab, 0xac0000ac, 0xad0000ad, 0xae0000ae, 0xaf0000af, + 0xb00000b0, 0xb10000b1, 0xb20000b2, 0xb30000b3, 0xb40000b4, 0xb50000b5, 0xb60000b6, 0xb70000b7, + 0xb80000b8, 0xb90000b9, 0xba0000ba, 0xbb0000bb, 0xbc0000bc, 0xbd0000bd, 0xbe0000be, 0xbf0000bf, + 0xc00000c0, 0xc10000c1, 0xc20000c2, 0xc30000c3, 0xc40000c4, 0xc50000c5, 0xc60000c6, 0xc70000c7, + 0xc80000c8, 0xc90000c9, 0xca0000ca, 0xcb0000cb, 0xcc0000cc, 0xcd0000cd, 0xce0000ce, 0xcf0000cf, + 0xd10000d1, 0xd20000d2, 0xd30000d3, 0xd40000d4, 0xd50000d5, 0xd60000d6, 0xd70000d7, 0xd80000d8, + 0xd90000d9, 0xda0000da, 0xdb0000db, 0xdc0000dc, 0xdf0000df, 0xe00000e0, 0xe10000e1, 0xe20000e2, + 0xe30000e3, 0xe40000e4, 0xe50000e5, 0xe60000e6, 0xe70000e7, 0xe80000e8, 0xe90000e9, 0xea0000ea, + 0xeb0000eb, 0xec0000ec, 0xed0000ed, 0xee0000ee, 0xef0000ef, 0xf10000f1, 0xf20000f2, 0xf30000f3, + 0xf40000f4, 0xf50000f5, 0xf60000f6, 0xf70000f7, 0xf80000f8, 0xf90000f9, 0xfa0000fa, 0xfb0000fb, + 0xfc0000fc, 0xff0000ff, 0xd000011e, 0xf000011f, 0xdd000130, 0xfd000131, 0x8c000152, 0x9c000153, + 0xde00015e, 0xfe00015f, 0x8a000160, 0x9a000161, 0x9f000178, 0x83000192, 0x880002c6, 0x980002dc, + 0x96002013, 0x97002014, 0x91002018, 0x92002019, 0x8200201a, 0x9300201c, 0x9400201d, 0x8400201e, + 0x86002020, 0x87002021, 0x95002022, 0x85002026, 0x89002030, 0x8b002039, 0x9b00203a, 0x800020ac, + 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, + }, +} + +// Windows1255 is the Windows 1255 encoding. +var Windows1255 *Charmap = &windows1255 + +var windows1255 = Charmap{ + name: "Windows 1255", + mib: identifier.Windows1255, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xac}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xe2, 0x80, 0x9a}}, {2, [3]byte{0xc6, 0x92, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0x9e}}, {3, [3]byte{0xe2, 0x80, 0xa6}}, + {3, [3]byte{0xe2, 0x80, 0xa0}}, {3, [3]byte{0xe2, 0x80, 0xa1}}, + {2, [3]byte{0xcb, 0x86, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xb0}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0xb9}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0x98}}, + {3, [3]byte{0xe2, 0x80, 0x99}}, {3, [3]byte{0xe2, 0x80, 0x9c}}, + {3, [3]byte{0xe2, 0x80, 0x9d}}, {3, [3]byte{0xe2, 0x80, 0xa2}}, + {3, [3]byte{0xe2, 0x80, 0x93}}, {3, [3]byte{0xe2, 0x80, 0x94}}, + {2, [3]byte{0xcb, 0x9c, 0x00}}, {3, [3]byte{0xe2, 0x84, 0xa2}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0xba}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xc2, 0xa1, 0x00}}, + {2, [3]byte{0xc2, 0xa2, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xaa}}, {2, [3]byte{0xc2, 0xa5, 0x00}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0x97, 0x00}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xc2, 0xaf, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc2, 0xb3, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc2, 0xb8, 0x00}}, {2, [3]byte{0xc2, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xb7, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbe, 0x00}}, {2, [3]byte{0xc2, 0xbf, 0x00}}, + {2, [3]byte{0xd6, 0xb0, 0x00}}, {2, [3]byte{0xd6, 0xb1, 0x00}}, + {2, [3]byte{0xd6, 0xb2, 0x00}}, {2, [3]byte{0xd6, 0xb3, 0x00}}, + {2, [3]byte{0xd6, 0xb4, 0x00}}, {2, [3]byte{0xd6, 0xb5, 0x00}}, + {2, [3]byte{0xd6, 0xb6, 0x00}}, {2, [3]byte{0xd6, 0xb7, 0x00}}, + {2, [3]byte{0xd6, 0xb8, 0x00}}, {2, [3]byte{0xd6, 0xb9, 0x00}}, + {2, [3]byte{0xd6, 0xba, 0x00}}, {2, [3]byte{0xd6, 0xbb, 0x00}}, + {2, [3]byte{0xd6, 0xbc, 0x00}}, {2, [3]byte{0xd6, 0xbd, 0x00}}, + {2, [3]byte{0xd6, 0xbe, 0x00}}, {2, [3]byte{0xd6, 0xbf, 0x00}}, + {2, [3]byte{0xd7, 0x80, 0x00}}, {2, [3]byte{0xd7, 0x81, 0x00}}, + {2, [3]byte{0xd7, 0x82, 0x00}}, {2, [3]byte{0xd7, 0x83, 0x00}}, + {2, [3]byte{0xd7, 0xb0, 0x00}}, {2, [3]byte{0xd7, 0xb1, 0x00}}, + {2, [3]byte{0xd7, 0xb2, 0x00}}, {2, [3]byte{0xd7, 0xb3, 0x00}}, + {2, [3]byte{0xd7, 0xb4, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xd7, 0x90, 0x00}}, {2, [3]byte{0xd7, 0x91, 0x00}}, + {2, [3]byte{0xd7, 0x92, 0x00}}, {2, [3]byte{0xd7, 0x93, 0x00}}, + {2, [3]byte{0xd7, 0x94, 0x00}}, {2, [3]byte{0xd7, 0x95, 0x00}}, + {2, [3]byte{0xd7, 0x96, 0x00}}, {2, [3]byte{0xd7, 0x97, 0x00}}, + {2, [3]byte{0xd7, 0x98, 0x00}}, {2, [3]byte{0xd7, 0x99, 0x00}}, + {2, [3]byte{0xd7, 0x9a, 0x00}}, {2, [3]byte{0xd7, 0x9b, 0x00}}, + {2, [3]byte{0xd7, 0x9c, 0x00}}, {2, [3]byte{0xd7, 0x9d, 0x00}}, + {2, [3]byte{0xd7, 0x9e, 0x00}}, {2, [3]byte{0xd7, 0x9f, 0x00}}, + {2, [3]byte{0xd7, 0xa0, 0x00}}, {2, [3]byte{0xd7, 0xa1, 0x00}}, + {2, [3]byte{0xd7, 0xa2, 0x00}}, {2, [3]byte{0xd7, 0xa3, 0x00}}, + {2, [3]byte{0xd7, 0xa4, 0x00}}, {2, [3]byte{0xd7, 0xa5, 0x00}}, + {2, [3]byte{0xd7, 0xa6, 0x00}}, {2, [3]byte{0xd7, 0xa7, 0x00}}, + {2, [3]byte{0xd7, 0xa8, 0x00}}, {2, [3]byte{0xd7, 0xa9, 0x00}}, + {2, [3]byte{0xd7, 0xaa, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0x8e}}, + {3, [3]byte{0xe2, 0x80, 0x8f}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa10000a1, 0xa20000a2, 0xa30000a3, 0xa50000a5, 0xa60000a6, 0xa70000a7, 0xa80000a8, + 0xa90000a9, 0xab0000ab, 0xac0000ac, 0xad0000ad, 0xae0000ae, 0xaf0000af, 0xb00000b0, 0xb10000b1, + 0xb20000b2, 0xb30000b3, 0xb40000b4, 0xb50000b5, 0xb60000b6, 0xb70000b7, 0xb80000b8, 0xb90000b9, + 0xbb0000bb, 0xbc0000bc, 0xbd0000bd, 0xbe0000be, 0xbf0000bf, 0xaa0000d7, 0xba0000f7, 0x83000192, + 0x880002c6, 0x980002dc, 0xc00005b0, 0xc10005b1, 0xc20005b2, 0xc30005b3, 0xc40005b4, 0xc50005b5, + 0xc60005b6, 0xc70005b7, 0xc80005b8, 0xc90005b9, 0xca0005ba, 0xcb0005bb, 0xcc0005bc, 0xcd0005bd, + 0xce0005be, 0xcf0005bf, 0xd00005c0, 0xd10005c1, 0xd20005c2, 0xd30005c3, 0xe00005d0, 0xe10005d1, + 0xe20005d2, 0xe30005d3, 0xe40005d4, 0xe50005d5, 0xe60005d6, 0xe70005d7, 0xe80005d8, 0xe90005d9, + 0xea0005da, 0xeb0005db, 0xec0005dc, 0xed0005dd, 0xee0005de, 0xef0005df, 0xf00005e0, 0xf10005e1, + 0xf20005e2, 0xf30005e3, 0xf40005e4, 0xf50005e5, 0xf60005e6, 0xf70005e7, 0xf80005e8, 0xf90005e9, + 0xfa0005ea, 0xd40005f0, 0xd50005f1, 0xd60005f2, 0xd70005f3, 0xd80005f4, 0xfd00200e, 0xfe00200f, + 0x96002013, 0x97002014, 0x91002018, 0x92002019, 0x8200201a, 0x9300201c, 0x9400201d, 0x8400201e, + 0x86002020, 0x87002021, 0x95002022, 0x85002026, 0x89002030, 0x8b002039, 0x9b00203a, 0xa40020aa, + 0x800020ac, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, + 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, + 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, + }, +} + +// Windows1256 is the Windows 1256 encoding. +var Windows1256 *Charmap = &windows1256 + +var windows1256 = Charmap{ + name: "Windows 1256", + mib: identifier.Windows1256, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xac}}, {2, [3]byte{0xd9, 0xbe, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0x9a}}, {2, [3]byte{0xc6, 0x92, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0x9e}}, {3, [3]byte{0xe2, 0x80, 0xa6}}, + {3, [3]byte{0xe2, 0x80, 0xa0}}, {3, [3]byte{0xe2, 0x80, 0xa1}}, + {2, [3]byte{0xcb, 0x86, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xb0}}, + {2, [3]byte{0xd9, 0xb9, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xb9}}, + {2, [3]byte{0xc5, 0x92, 0x00}}, {2, [3]byte{0xda, 0x86, 0x00}}, + {2, [3]byte{0xda, 0x98, 0x00}}, {2, [3]byte{0xda, 0x88, 0x00}}, + {2, [3]byte{0xda, 0xaf, 0x00}}, {3, [3]byte{0xe2, 0x80, 0x98}}, + {3, [3]byte{0xe2, 0x80, 0x99}}, {3, [3]byte{0xe2, 0x80, 0x9c}}, + {3, [3]byte{0xe2, 0x80, 0x9d}}, {3, [3]byte{0xe2, 0x80, 0xa2}}, + {3, [3]byte{0xe2, 0x80, 0x93}}, {3, [3]byte{0xe2, 0x80, 0x94}}, + {2, [3]byte{0xda, 0xa9, 0x00}}, {3, [3]byte{0xe2, 0x84, 0xa2}}, + {2, [3]byte{0xda, 0x91, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xba}}, + {2, [3]byte{0xc5, 0x93, 0x00}}, {3, [3]byte{0xe2, 0x80, 0x8c}}, + {3, [3]byte{0xe2, 0x80, 0x8d}}, {2, [3]byte{0xda, 0xba, 0x00}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xd8, 0x8c, 0x00}}, + {2, [3]byte{0xc2, 0xa2, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {2, [3]byte{0xc2, 0xa5, 0x00}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xda, 0xbe, 0x00}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xc2, 0xaf, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc2, 0xb3, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc2, 0xb8, 0x00}}, {2, [3]byte{0xc2, 0xb9, 0x00}}, + {2, [3]byte{0xd8, 0x9b, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbe, 0x00}}, {2, [3]byte{0xd8, 0x9f, 0x00}}, + {2, [3]byte{0xdb, 0x81, 0x00}}, {2, [3]byte{0xd8, 0xa1, 0x00}}, + {2, [3]byte{0xd8, 0xa2, 0x00}}, {2, [3]byte{0xd8, 0xa3, 0x00}}, + {2, [3]byte{0xd8, 0xa4, 0x00}}, {2, [3]byte{0xd8, 0xa5, 0x00}}, + {2, [3]byte{0xd8, 0xa6, 0x00}}, {2, [3]byte{0xd8, 0xa7, 0x00}}, + {2, [3]byte{0xd8, 0xa8, 0x00}}, {2, [3]byte{0xd8, 0xa9, 0x00}}, + {2, [3]byte{0xd8, 0xaa, 0x00}}, {2, [3]byte{0xd8, 0xab, 0x00}}, + {2, [3]byte{0xd8, 0xac, 0x00}}, {2, [3]byte{0xd8, 0xad, 0x00}}, + {2, [3]byte{0xd8, 0xae, 0x00}}, {2, [3]byte{0xd8, 0xaf, 0x00}}, + {2, [3]byte{0xd8, 0xb0, 0x00}}, {2, [3]byte{0xd8, 0xb1, 0x00}}, + {2, [3]byte{0xd8, 0xb2, 0x00}}, {2, [3]byte{0xd8, 0xb3, 0x00}}, + {2, [3]byte{0xd8, 0xb4, 0x00}}, {2, [3]byte{0xd8, 0xb5, 0x00}}, + {2, [3]byte{0xd8, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {2, [3]byte{0xd8, 0xb7, 0x00}}, {2, [3]byte{0xd8, 0xb8, 0x00}}, + {2, [3]byte{0xd8, 0xb9, 0x00}}, {2, [3]byte{0xd8, 0xba, 0x00}}, + {2, [3]byte{0xd9, 0x80, 0x00}}, {2, [3]byte{0xd9, 0x81, 0x00}}, + {2, [3]byte{0xd9, 0x82, 0x00}}, {2, [3]byte{0xd9, 0x83, 0x00}}, + {2, [3]byte{0xc3, 0xa0, 0x00}}, {2, [3]byte{0xd9, 0x84, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xd9, 0x85, 0x00}}, + {2, [3]byte{0xd9, 0x86, 0x00}}, {2, [3]byte{0xd9, 0x87, 0x00}}, + {2, [3]byte{0xd9, 0x88, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xd9, 0x89, 0x00}}, {2, [3]byte{0xd9, 0x8a, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xd9, 0x8b, 0x00}}, {2, [3]byte{0xd9, 0x8c, 0x00}}, + {2, [3]byte{0xd9, 0x8d, 0x00}}, {2, [3]byte{0xd9, 0x8e, 0x00}}, + {2, [3]byte{0xc3, 0xb4, 0x00}}, {2, [3]byte{0xd9, 0x8f, 0x00}}, + {2, [3]byte{0xd9, 0x90, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {2, [3]byte{0xd9, 0x91, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xd9, 0x92, 0x00}}, {2, [3]byte{0xc3, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {3, [3]byte{0xe2, 0x80, 0x8e}}, + {3, [3]byte{0xe2, 0x80, 0x8f}}, {2, [3]byte{0xdb, 0x92, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa20000a2, 0xa30000a3, 0xa40000a4, 0xa50000a5, 0xa60000a6, 0xa70000a7, 0xa80000a8, + 0xa90000a9, 0xab0000ab, 0xac0000ac, 0xad0000ad, 0xae0000ae, 0xaf0000af, 0xb00000b0, 0xb10000b1, + 0xb20000b2, 0xb30000b3, 0xb40000b4, 0xb50000b5, 0xb60000b6, 0xb70000b7, 0xb80000b8, 0xb90000b9, + 0xbb0000bb, 0xbc0000bc, 0xbd0000bd, 0xbe0000be, 0xd70000d7, 0xe00000e0, 0xe20000e2, 0xe70000e7, + 0xe80000e8, 0xe90000e9, 0xea0000ea, 0xeb0000eb, 0xee0000ee, 0xef0000ef, 0xf40000f4, 0xf70000f7, + 0xf90000f9, 0xfb0000fb, 0xfc0000fc, 0x8c000152, 0x9c000153, 0x83000192, 0x880002c6, 0xa100060c, + 0xba00061b, 0xbf00061f, 0xc1000621, 0xc2000622, 0xc3000623, 0xc4000624, 0xc5000625, 0xc6000626, + 0xc7000627, 0xc8000628, 0xc9000629, 0xca00062a, 0xcb00062b, 0xcc00062c, 0xcd00062d, 0xce00062e, + 0xcf00062f, 0xd0000630, 0xd1000631, 0xd2000632, 0xd3000633, 0xd4000634, 0xd5000635, 0xd6000636, + 0xd8000637, 0xd9000638, 0xda000639, 0xdb00063a, 0xdc000640, 0xdd000641, 0xde000642, 0xdf000643, + 0xe1000644, 0xe3000645, 0xe4000646, 0xe5000647, 0xe6000648, 0xec000649, 0xed00064a, 0xf000064b, + 0xf100064c, 0xf200064d, 0xf300064e, 0xf500064f, 0xf6000650, 0xf8000651, 0xfa000652, 0x8a000679, + 0x8100067e, 0x8d000686, 0x8f000688, 0x9a000691, 0x8e000698, 0x980006a9, 0x900006af, 0x9f0006ba, + 0xaa0006be, 0xc00006c1, 0xff0006d2, 0x9d00200c, 0x9e00200d, 0xfd00200e, 0xfe00200f, 0x96002013, + 0x97002014, 0x91002018, 0x92002019, 0x8200201a, 0x9300201c, 0x9400201d, 0x8400201e, 0x86002020, + 0x87002021, 0x95002022, 0x85002026, 0x89002030, 0x8b002039, 0x9b00203a, 0x800020ac, 0x99002122, + }, +} + +// Windows1257 is the Windows 1257 encoding. +var Windows1257 *Charmap = &windows1257 + +var windows1257 = Charmap{ + name: "Windows 1257", + mib: identifier.Windows1257, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xac}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xe2, 0x80, 0x9a}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xe2, 0x80, 0x9e}}, {3, [3]byte{0xe2, 0x80, 0xa6}}, + {3, [3]byte{0xe2, 0x80, 0xa0}}, {3, [3]byte{0xe2, 0x80, 0xa1}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0xb0}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0xb9}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {2, [3]byte{0xc2, 0xa8, 0x00}}, + {2, [3]byte{0xcb, 0x87, 0x00}}, {2, [3]byte{0xc2, 0xb8, 0x00}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0x98}}, + {3, [3]byte{0xe2, 0x80, 0x99}}, {3, [3]byte{0xe2, 0x80, 0x9c}}, + {3, [3]byte{0xe2, 0x80, 0x9d}}, {3, [3]byte{0xe2, 0x80, 0xa2}}, + {3, [3]byte{0xe2, 0x80, 0x93}}, {3, [3]byte{0xe2, 0x80, 0x94}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x84, 0xa2}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0xba}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {2, [3]byte{0xc2, 0xaf, 0x00}}, + {2, [3]byte{0xcb, 0x9b, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa2, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0x98, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xc5, 0x96, 0x00}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xc3, 0x86, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc2, 0xb3, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc3, 0xb8, 0x00}}, {2, [3]byte{0xc2, 0xb9, 0x00}}, + {2, [3]byte{0xc5, 0x97, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbe, 0x00}}, {2, [3]byte{0xc3, 0xa6, 0x00}}, + {2, [3]byte{0xc4, 0x84, 0x00}}, {2, [3]byte{0xc4, 0xae, 0x00}}, + {2, [3]byte{0xc4, 0x80, 0x00}}, {2, [3]byte{0xc4, 0x86, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc4, 0x98, 0x00}}, {2, [3]byte{0xc4, 0x92, 0x00}}, + {2, [3]byte{0xc4, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc5, 0xb9, 0x00}}, {2, [3]byte{0xc4, 0x96, 0x00}}, + {2, [3]byte{0xc4, 0xa2, 0x00}}, {2, [3]byte{0xc4, 0xb6, 0x00}}, + {2, [3]byte{0xc4, 0xaa, 0x00}}, {2, [3]byte{0xc4, 0xbb, 0x00}}, + {2, [3]byte{0xc5, 0xa0, 0x00}}, {2, [3]byte{0xc5, 0x83, 0x00}}, + {2, [3]byte{0xc5, 0x85, 0x00}}, {2, [3]byte{0xc3, 0x93, 0x00}}, + {2, [3]byte{0xc5, 0x8c, 0x00}}, {2, [3]byte{0xc3, 0x95, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {2, [3]byte{0xc5, 0xb2, 0x00}}, {2, [3]byte{0xc5, 0x81, 0x00}}, + {2, [3]byte{0xc5, 0x9a, 0x00}}, {2, [3]byte{0xc5, 0xaa, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc5, 0xbb, 0x00}}, + {2, [3]byte{0xc5, 0xbd, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc4, 0x85, 0x00}}, {2, [3]byte{0xc4, 0xaf, 0x00}}, + {2, [3]byte{0xc4, 0x81, 0x00}}, {2, [3]byte{0xc4, 0x87, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa5, 0x00}}, + {2, [3]byte{0xc4, 0x99, 0x00}}, {2, [3]byte{0xc4, 0x93, 0x00}}, + {2, [3]byte{0xc4, 0x8d, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc5, 0xba, 0x00}}, {2, [3]byte{0xc4, 0x97, 0x00}}, + {2, [3]byte{0xc4, 0xa3, 0x00}}, {2, [3]byte{0xc4, 0xb7, 0x00}}, + {2, [3]byte{0xc4, 0xab, 0x00}}, {2, [3]byte{0xc4, 0xbc, 0x00}}, + {2, [3]byte{0xc5, 0xa1, 0x00}}, {2, [3]byte{0xc5, 0x84, 0x00}}, + {2, [3]byte{0xc5, 0x86, 0x00}}, {2, [3]byte{0xc3, 0xb3, 0x00}}, + {2, [3]byte{0xc5, 0x8d, 0x00}}, {2, [3]byte{0xc3, 0xb5, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {2, [3]byte{0xc5, 0xb3, 0x00}}, {2, [3]byte{0xc5, 0x82, 0x00}}, + {2, [3]byte{0xc5, 0x9b, 0x00}}, {2, [3]byte{0xc5, 0xab, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc5, 0xbc, 0x00}}, + {2, [3]byte{0xc5, 0xbe, 0x00}}, {2, [3]byte{0xcb, 0x99, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa20000a2, 0xa30000a3, 0xa40000a4, 0xa60000a6, 0xa70000a7, 0x8d0000a8, 0xa90000a9, + 0xab0000ab, 0xac0000ac, 0xad0000ad, 0xae0000ae, 0x9d0000af, 0xb00000b0, 0xb10000b1, 0xb20000b2, + 0xb30000b3, 0xb40000b4, 0xb50000b5, 0xb60000b6, 0xb70000b7, 0x8f0000b8, 0xb90000b9, 0xbb0000bb, + 0xbc0000bc, 0xbd0000bd, 0xbe0000be, 0xc40000c4, 0xc50000c5, 0xaf0000c6, 0xc90000c9, 0xd30000d3, + 0xd50000d5, 0xd60000d6, 0xd70000d7, 0xa80000d8, 0xdc0000dc, 0xdf0000df, 0xe40000e4, 0xe50000e5, + 0xbf0000e6, 0xe90000e9, 0xf30000f3, 0xf50000f5, 0xf60000f6, 0xf70000f7, 0xb80000f8, 0xfc0000fc, + 0xc2000100, 0xe2000101, 0xc0000104, 0xe0000105, 0xc3000106, 0xe3000107, 0xc800010c, 0xe800010d, + 0xc7000112, 0xe7000113, 0xcb000116, 0xeb000117, 0xc6000118, 0xe6000119, 0xcc000122, 0xec000123, + 0xce00012a, 0xee00012b, 0xc100012e, 0xe100012f, 0xcd000136, 0xed000137, 0xcf00013b, 0xef00013c, + 0xd9000141, 0xf9000142, 0xd1000143, 0xf1000144, 0xd2000145, 0xf2000146, 0xd400014c, 0xf400014d, + 0xaa000156, 0xba000157, 0xda00015a, 0xfa00015b, 0xd0000160, 0xf0000161, 0xdb00016a, 0xfb00016b, + 0xd8000172, 0xf8000173, 0xca000179, 0xea00017a, 0xdd00017b, 0xfd00017c, 0xde00017d, 0xfe00017e, + 0x8e0002c7, 0xff0002d9, 0x9e0002db, 0x96002013, 0x97002014, 0x91002018, 0x92002019, 0x8200201a, + 0x9300201c, 0x9400201d, 0x8400201e, 0x86002020, 0x87002021, 0x95002022, 0x85002026, 0x89002030, + 0x8b002039, 0x9b00203a, 0x800020ac, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, + 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, + }, +} + +// Windows1258 is the Windows 1258 encoding. +var Windows1258 *Charmap = &windows1258 + +var windows1258 = Charmap{ + name: "Windows 1258", + mib: identifier.Windows1258, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xac}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xe2, 0x80, 0x9a}}, {2, [3]byte{0xc6, 0x92, 0x00}}, + {3, [3]byte{0xe2, 0x80, 0x9e}}, {3, [3]byte{0xe2, 0x80, 0xa6}}, + {3, [3]byte{0xe2, 0x80, 0xa0}}, {3, [3]byte{0xe2, 0x80, 0xa1}}, + {2, [3]byte{0xcb, 0x86, 0x00}}, {3, [3]byte{0xe2, 0x80, 0xb0}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0xb9}}, + {2, [3]byte{0xc5, 0x92, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0x98}}, + {3, [3]byte{0xe2, 0x80, 0x99}}, {3, [3]byte{0xe2, 0x80, 0x9c}}, + {3, [3]byte{0xe2, 0x80, 0x9d}}, {3, [3]byte{0xe2, 0x80, 0xa2}}, + {3, [3]byte{0xe2, 0x80, 0x93}}, {3, [3]byte{0xe2, 0x80, 0x94}}, + {2, [3]byte{0xcb, 0x9c, 0x00}}, {3, [3]byte{0xe2, 0x84, 0xa2}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {3, [3]byte{0xe2, 0x80, 0xba}}, + {2, [3]byte{0xc5, 0x93, 0x00}}, {3, [3]byte{0xef, 0xbf, 0xbd}}, + {3, [3]byte{0xef, 0xbf, 0xbd}}, {2, [3]byte{0xc5, 0xb8, 0x00}}, + {2, [3]byte{0xc2, 0xa0, 0x00}}, {2, [3]byte{0xc2, 0xa1, 0x00}}, + {2, [3]byte{0xc2, 0xa2, 0x00}}, {2, [3]byte{0xc2, 0xa3, 0x00}}, + {2, [3]byte{0xc2, 0xa4, 0x00}}, {2, [3]byte{0xc2, 0xa5, 0x00}}, + {2, [3]byte{0xc2, 0xa6, 0x00}}, {2, [3]byte{0xc2, 0xa7, 0x00}}, + {2, [3]byte{0xc2, 0xa8, 0x00}}, {2, [3]byte{0xc2, 0xa9, 0x00}}, + {2, [3]byte{0xc2, 0xaa, 0x00}}, {2, [3]byte{0xc2, 0xab, 0x00}}, + {2, [3]byte{0xc2, 0xac, 0x00}}, {2, [3]byte{0xc2, 0xad, 0x00}}, + {2, [3]byte{0xc2, 0xae, 0x00}}, {2, [3]byte{0xc2, 0xaf, 0x00}}, + {2, [3]byte{0xc2, 0xb0, 0x00}}, {2, [3]byte{0xc2, 0xb1, 0x00}}, + {2, [3]byte{0xc2, 0xb2, 0x00}}, {2, [3]byte{0xc2, 0xb3, 0x00}}, + {2, [3]byte{0xc2, 0xb4, 0x00}}, {2, [3]byte{0xc2, 0xb5, 0x00}}, + {2, [3]byte{0xc2, 0xb6, 0x00}}, {2, [3]byte{0xc2, 0xb7, 0x00}}, + {2, [3]byte{0xc2, 0xb8, 0x00}}, {2, [3]byte{0xc2, 0xb9, 0x00}}, + {2, [3]byte{0xc2, 0xba, 0x00}}, {2, [3]byte{0xc2, 0xbb, 0x00}}, + {2, [3]byte{0xc2, 0xbc, 0x00}}, {2, [3]byte{0xc2, 0xbd, 0x00}}, + {2, [3]byte{0xc2, 0xbe, 0x00}}, {2, [3]byte{0xc2, 0xbf, 0x00}}, + {2, [3]byte{0xc3, 0x80, 0x00}}, {2, [3]byte{0xc3, 0x81, 0x00}}, + {2, [3]byte{0xc3, 0x82, 0x00}}, {2, [3]byte{0xc4, 0x82, 0x00}}, + {2, [3]byte{0xc3, 0x84, 0x00}}, {2, [3]byte{0xc3, 0x85, 0x00}}, + {2, [3]byte{0xc3, 0x86, 0x00}}, {2, [3]byte{0xc3, 0x87, 0x00}}, + {2, [3]byte{0xc3, 0x88, 0x00}}, {2, [3]byte{0xc3, 0x89, 0x00}}, + {2, [3]byte{0xc3, 0x8a, 0x00}}, {2, [3]byte{0xc3, 0x8b, 0x00}}, + {2, [3]byte{0xcc, 0x80, 0x00}}, {2, [3]byte{0xc3, 0x8d, 0x00}}, + {2, [3]byte{0xc3, 0x8e, 0x00}}, {2, [3]byte{0xc3, 0x8f, 0x00}}, + {2, [3]byte{0xc4, 0x90, 0x00}}, {2, [3]byte{0xc3, 0x91, 0x00}}, + {2, [3]byte{0xcc, 0x89, 0x00}}, {2, [3]byte{0xc3, 0x93, 0x00}}, + {2, [3]byte{0xc3, 0x94, 0x00}}, {2, [3]byte{0xc6, 0xa0, 0x00}}, + {2, [3]byte{0xc3, 0x96, 0x00}}, {2, [3]byte{0xc3, 0x97, 0x00}}, + {2, [3]byte{0xc3, 0x98, 0x00}}, {2, [3]byte{0xc3, 0x99, 0x00}}, + {2, [3]byte{0xc3, 0x9a, 0x00}}, {2, [3]byte{0xc3, 0x9b, 0x00}}, + {2, [3]byte{0xc3, 0x9c, 0x00}}, {2, [3]byte{0xc6, 0xaf, 0x00}}, + {2, [3]byte{0xcc, 0x83, 0x00}}, {2, [3]byte{0xc3, 0x9f, 0x00}}, + {2, [3]byte{0xc3, 0xa0, 0x00}}, {2, [3]byte{0xc3, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xa2, 0x00}}, {2, [3]byte{0xc4, 0x83, 0x00}}, + {2, [3]byte{0xc3, 0xa4, 0x00}}, {2, [3]byte{0xc3, 0xa5, 0x00}}, + {2, [3]byte{0xc3, 0xa6, 0x00}}, {2, [3]byte{0xc3, 0xa7, 0x00}}, + {2, [3]byte{0xc3, 0xa8, 0x00}}, {2, [3]byte{0xc3, 0xa9, 0x00}}, + {2, [3]byte{0xc3, 0xaa, 0x00}}, {2, [3]byte{0xc3, 0xab, 0x00}}, + {2, [3]byte{0xcc, 0x81, 0x00}}, {2, [3]byte{0xc3, 0xad, 0x00}}, + {2, [3]byte{0xc3, 0xae, 0x00}}, {2, [3]byte{0xc3, 0xaf, 0x00}}, + {2, [3]byte{0xc4, 0x91, 0x00}}, {2, [3]byte{0xc3, 0xb1, 0x00}}, + {2, [3]byte{0xcc, 0xa3, 0x00}}, {2, [3]byte{0xc3, 0xb3, 0x00}}, + {2, [3]byte{0xc3, 0xb4, 0x00}}, {2, [3]byte{0xc6, 0xa1, 0x00}}, + {2, [3]byte{0xc3, 0xb6, 0x00}}, {2, [3]byte{0xc3, 0xb7, 0x00}}, + {2, [3]byte{0xc3, 0xb8, 0x00}}, {2, [3]byte{0xc3, 0xb9, 0x00}}, + {2, [3]byte{0xc3, 0xba, 0x00}}, {2, [3]byte{0xc3, 0xbb, 0x00}}, + {2, [3]byte{0xc3, 0xbc, 0x00}}, {2, [3]byte{0xc6, 0xb0, 0x00}}, + {3, [3]byte{0xe2, 0x82, 0xab}}, {2, [3]byte{0xc3, 0xbf, 0x00}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0xa00000a0, 0xa10000a1, 0xa20000a2, 0xa30000a3, 0xa40000a4, 0xa50000a5, 0xa60000a6, 0xa70000a7, + 0xa80000a8, 0xa90000a9, 0xaa0000aa, 0xab0000ab, 0xac0000ac, 0xad0000ad, 0xae0000ae, 0xaf0000af, + 0xb00000b0, 0xb10000b1, 0xb20000b2, 0xb30000b3, 0xb40000b4, 0xb50000b5, 0xb60000b6, 0xb70000b7, + 0xb80000b8, 0xb90000b9, 0xba0000ba, 0xbb0000bb, 0xbc0000bc, 0xbd0000bd, 0xbe0000be, 0xbf0000bf, + 0xc00000c0, 0xc10000c1, 0xc20000c2, 0xc40000c4, 0xc50000c5, 0xc60000c6, 0xc70000c7, 0xc80000c8, + 0xc90000c9, 0xca0000ca, 0xcb0000cb, 0xcd0000cd, 0xce0000ce, 0xcf0000cf, 0xd10000d1, 0xd30000d3, + 0xd40000d4, 0xd60000d6, 0xd70000d7, 0xd80000d8, 0xd90000d9, 0xda0000da, 0xdb0000db, 0xdc0000dc, + 0xdf0000df, 0xe00000e0, 0xe10000e1, 0xe20000e2, 0xe40000e4, 0xe50000e5, 0xe60000e6, 0xe70000e7, + 0xe80000e8, 0xe90000e9, 0xea0000ea, 0xeb0000eb, 0xed0000ed, 0xee0000ee, 0xef0000ef, 0xf10000f1, + 0xf30000f3, 0xf40000f4, 0xf60000f6, 0xf70000f7, 0xf80000f8, 0xf90000f9, 0xfa0000fa, 0xfb0000fb, + 0xfc0000fc, 0xff0000ff, 0xc3000102, 0xe3000103, 0xd0000110, 0xf0000111, 0x8c000152, 0x9c000153, + 0x9f000178, 0x83000192, 0xd50001a0, 0xf50001a1, 0xdd0001af, 0xfd0001b0, 0x880002c6, 0x980002dc, + 0xcc000300, 0xec000301, 0xde000303, 0xd2000309, 0xf2000323, 0x96002013, 0x97002014, 0x91002018, + 0x92002019, 0x8200201a, 0x9300201c, 0x9400201d, 0x8400201e, 0x86002020, 0x87002021, 0x95002022, + 0x85002026, 0x89002030, 0x8b002039, 0x9b00203a, 0xfe0020ab, 0x800020ac, 0x99002122, 0x99002122, + 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, 0x99002122, + }, +} + +// XUserDefined is the X-User-Defined encoding. +// +// It is defined at http://encoding.spec.whatwg.org/#x-user-defined +var XUserDefined *Charmap = &xUserDefined + +var xUserDefined = Charmap{ + name: "X-User-Defined", + mib: identifier.XUserDefined, + asciiSuperset: true, + low: 0x80, + replacement: 0x1a, + decode: [256]utf8Enc{ + {1, [3]byte{0x00, 0x00, 0x00}}, {1, [3]byte{0x01, 0x00, 0x00}}, + {1, [3]byte{0x02, 0x00, 0x00}}, {1, [3]byte{0x03, 0x00, 0x00}}, + {1, [3]byte{0x04, 0x00, 0x00}}, {1, [3]byte{0x05, 0x00, 0x00}}, + {1, [3]byte{0x06, 0x00, 0x00}}, {1, [3]byte{0x07, 0x00, 0x00}}, + {1, [3]byte{0x08, 0x00, 0x00}}, {1, [3]byte{0x09, 0x00, 0x00}}, + {1, [3]byte{0x0a, 0x00, 0x00}}, {1, [3]byte{0x0b, 0x00, 0x00}}, + {1, [3]byte{0x0c, 0x00, 0x00}}, {1, [3]byte{0x0d, 0x00, 0x00}}, + {1, [3]byte{0x0e, 0x00, 0x00}}, {1, [3]byte{0x0f, 0x00, 0x00}}, + {1, [3]byte{0x10, 0x00, 0x00}}, {1, [3]byte{0x11, 0x00, 0x00}}, + {1, [3]byte{0x12, 0x00, 0x00}}, {1, [3]byte{0x13, 0x00, 0x00}}, + {1, [3]byte{0x14, 0x00, 0x00}}, {1, [3]byte{0x15, 0x00, 0x00}}, + {1, [3]byte{0x16, 0x00, 0x00}}, {1, [3]byte{0x17, 0x00, 0x00}}, + {1, [3]byte{0x18, 0x00, 0x00}}, {1, [3]byte{0x19, 0x00, 0x00}}, + {1, [3]byte{0x1a, 0x00, 0x00}}, {1, [3]byte{0x1b, 0x00, 0x00}}, + {1, [3]byte{0x1c, 0x00, 0x00}}, {1, [3]byte{0x1d, 0x00, 0x00}}, + {1, [3]byte{0x1e, 0x00, 0x00}}, {1, [3]byte{0x1f, 0x00, 0x00}}, + {1, [3]byte{0x20, 0x00, 0x00}}, {1, [3]byte{0x21, 0x00, 0x00}}, + {1, [3]byte{0x22, 0x00, 0x00}}, {1, [3]byte{0x23, 0x00, 0x00}}, + {1, [3]byte{0x24, 0x00, 0x00}}, {1, [3]byte{0x25, 0x00, 0x00}}, + {1, [3]byte{0x26, 0x00, 0x00}}, {1, [3]byte{0x27, 0x00, 0x00}}, + {1, [3]byte{0x28, 0x00, 0x00}}, {1, [3]byte{0x29, 0x00, 0x00}}, + {1, [3]byte{0x2a, 0x00, 0x00}}, {1, [3]byte{0x2b, 0x00, 0x00}}, + {1, [3]byte{0x2c, 0x00, 0x00}}, {1, [3]byte{0x2d, 0x00, 0x00}}, + {1, [3]byte{0x2e, 0x00, 0x00}}, {1, [3]byte{0x2f, 0x00, 0x00}}, + {1, [3]byte{0x30, 0x00, 0x00}}, {1, [3]byte{0x31, 0x00, 0x00}}, + {1, [3]byte{0x32, 0x00, 0x00}}, {1, [3]byte{0x33, 0x00, 0x00}}, + {1, [3]byte{0x34, 0x00, 0x00}}, {1, [3]byte{0x35, 0x00, 0x00}}, + {1, [3]byte{0x36, 0x00, 0x00}}, {1, [3]byte{0x37, 0x00, 0x00}}, + {1, [3]byte{0x38, 0x00, 0x00}}, {1, [3]byte{0x39, 0x00, 0x00}}, + {1, [3]byte{0x3a, 0x00, 0x00}}, {1, [3]byte{0x3b, 0x00, 0x00}}, + {1, [3]byte{0x3c, 0x00, 0x00}}, {1, [3]byte{0x3d, 0x00, 0x00}}, + {1, [3]byte{0x3e, 0x00, 0x00}}, {1, [3]byte{0x3f, 0x00, 0x00}}, + {1, [3]byte{0x40, 0x00, 0x00}}, {1, [3]byte{0x41, 0x00, 0x00}}, + {1, [3]byte{0x42, 0x00, 0x00}}, {1, [3]byte{0x43, 0x00, 0x00}}, + {1, [3]byte{0x44, 0x00, 0x00}}, {1, [3]byte{0x45, 0x00, 0x00}}, + {1, [3]byte{0x46, 0x00, 0x00}}, {1, [3]byte{0x47, 0x00, 0x00}}, + {1, [3]byte{0x48, 0x00, 0x00}}, {1, [3]byte{0x49, 0x00, 0x00}}, + {1, [3]byte{0x4a, 0x00, 0x00}}, {1, [3]byte{0x4b, 0x00, 0x00}}, + {1, [3]byte{0x4c, 0x00, 0x00}}, {1, [3]byte{0x4d, 0x00, 0x00}}, + {1, [3]byte{0x4e, 0x00, 0x00}}, {1, [3]byte{0x4f, 0x00, 0x00}}, + {1, [3]byte{0x50, 0x00, 0x00}}, {1, [3]byte{0x51, 0x00, 0x00}}, + {1, [3]byte{0x52, 0x00, 0x00}}, {1, [3]byte{0x53, 0x00, 0x00}}, + {1, [3]byte{0x54, 0x00, 0x00}}, {1, [3]byte{0x55, 0x00, 0x00}}, + {1, [3]byte{0x56, 0x00, 0x00}}, {1, [3]byte{0x57, 0x00, 0x00}}, + {1, [3]byte{0x58, 0x00, 0x00}}, {1, [3]byte{0x59, 0x00, 0x00}}, + {1, [3]byte{0x5a, 0x00, 0x00}}, {1, [3]byte{0x5b, 0x00, 0x00}}, + {1, [3]byte{0x5c, 0x00, 0x00}}, {1, [3]byte{0x5d, 0x00, 0x00}}, + {1, [3]byte{0x5e, 0x00, 0x00}}, {1, [3]byte{0x5f, 0x00, 0x00}}, + {1, [3]byte{0x60, 0x00, 0x00}}, {1, [3]byte{0x61, 0x00, 0x00}}, + {1, [3]byte{0x62, 0x00, 0x00}}, {1, [3]byte{0x63, 0x00, 0x00}}, + {1, [3]byte{0x64, 0x00, 0x00}}, {1, [3]byte{0x65, 0x00, 0x00}}, + {1, [3]byte{0x66, 0x00, 0x00}}, {1, [3]byte{0x67, 0x00, 0x00}}, + {1, [3]byte{0x68, 0x00, 0x00}}, {1, [3]byte{0x69, 0x00, 0x00}}, + {1, [3]byte{0x6a, 0x00, 0x00}}, {1, [3]byte{0x6b, 0x00, 0x00}}, + {1, [3]byte{0x6c, 0x00, 0x00}}, {1, [3]byte{0x6d, 0x00, 0x00}}, + {1, [3]byte{0x6e, 0x00, 0x00}}, {1, [3]byte{0x6f, 0x00, 0x00}}, + {1, [3]byte{0x70, 0x00, 0x00}}, {1, [3]byte{0x71, 0x00, 0x00}}, + {1, [3]byte{0x72, 0x00, 0x00}}, {1, [3]byte{0x73, 0x00, 0x00}}, + {1, [3]byte{0x74, 0x00, 0x00}}, {1, [3]byte{0x75, 0x00, 0x00}}, + {1, [3]byte{0x76, 0x00, 0x00}}, {1, [3]byte{0x77, 0x00, 0x00}}, + {1, [3]byte{0x78, 0x00, 0x00}}, {1, [3]byte{0x79, 0x00, 0x00}}, + {1, [3]byte{0x7a, 0x00, 0x00}}, {1, [3]byte{0x7b, 0x00, 0x00}}, + {1, [3]byte{0x7c, 0x00, 0x00}}, {1, [3]byte{0x7d, 0x00, 0x00}}, + {1, [3]byte{0x7e, 0x00, 0x00}}, {1, [3]byte{0x7f, 0x00, 0x00}}, + {3, [3]byte{0xef, 0x9e, 0x80}}, {3, [3]byte{0xef, 0x9e, 0x81}}, + {3, [3]byte{0xef, 0x9e, 0x82}}, {3, [3]byte{0xef, 0x9e, 0x83}}, + {3, [3]byte{0xef, 0x9e, 0x84}}, {3, [3]byte{0xef, 0x9e, 0x85}}, + {3, [3]byte{0xef, 0x9e, 0x86}}, {3, [3]byte{0xef, 0x9e, 0x87}}, + {3, [3]byte{0xef, 0x9e, 0x88}}, {3, [3]byte{0xef, 0x9e, 0x89}}, + {3, [3]byte{0xef, 0x9e, 0x8a}}, {3, [3]byte{0xef, 0x9e, 0x8b}}, + {3, [3]byte{0xef, 0x9e, 0x8c}}, {3, [3]byte{0xef, 0x9e, 0x8d}}, + {3, [3]byte{0xef, 0x9e, 0x8e}}, {3, [3]byte{0xef, 0x9e, 0x8f}}, + {3, [3]byte{0xef, 0x9e, 0x90}}, {3, [3]byte{0xef, 0x9e, 0x91}}, + {3, [3]byte{0xef, 0x9e, 0x92}}, {3, [3]byte{0xef, 0x9e, 0x93}}, + {3, [3]byte{0xef, 0x9e, 0x94}}, {3, [3]byte{0xef, 0x9e, 0x95}}, + {3, [3]byte{0xef, 0x9e, 0x96}}, {3, [3]byte{0xef, 0x9e, 0x97}}, + {3, [3]byte{0xef, 0x9e, 0x98}}, {3, [3]byte{0xef, 0x9e, 0x99}}, + {3, [3]byte{0xef, 0x9e, 0x9a}}, {3, [3]byte{0xef, 0x9e, 0x9b}}, + {3, [3]byte{0xef, 0x9e, 0x9c}}, {3, [3]byte{0xef, 0x9e, 0x9d}}, + {3, [3]byte{0xef, 0x9e, 0x9e}}, {3, [3]byte{0xef, 0x9e, 0x9f}}, + {3, [3]byte{0xef, 0x9e, 0xa0}}, {3, [3]byte{0xef, 0x9e, 0xa1}}, + {3, [3]byte{0xef, 0x9e, 0xa2}}, {3, [3]byte{0xef, 0x9e, 0xa3}}, + {3, [3]byte{0xef, 0x9e, 0xa4}}, {3, [3]byte{0xef, 0x9e, 0xa5}}, + {3, [3]byte{0xef, 0x9e, 0xa6}}, {3, [3]byte{0xef, 0x9e, 0xa7}}, + {3, [3]byte{0xef, 0x9e, 0xa8}}, {3, [3]byte{0xef, 0x9e, 0xa9}}, + {3, [3]byte{0xef, 0x9e, 0xaa}}, {3, [3]byte{0xef, 0x9e, 0xab}}, + {3, [3]byte{0xef, 0x9e, 0xac}}, {3, [3]byte{0xef, 0x9e, 0xad}}, + {3, [3]byte{0xef, 0x9e, 0xae}}, {3, [3]byte{0xef, 0x9e, 0xaf}}, + {3, [3]byte{0xef, 0x9e, 0xb0}}, {3, [3]byte{0xef, 0x9e, 0xb1}}, + {3, [3]byte{0xef, 0x9e, 0xb2}}, {3, [3]byte{0xef, 0x9e, 0xb3}}, + {3, [3]byte{0xef, 0x9e, 0xb4}}, {3, [3]byte{0xef, 0x9e, 0xb5}}, + {3, [3]byte{0xef, 0x9e, 0xb6}}, {3, [3]byte{0xef, 0x9e, 0xb7}}, + {3, [3]byte{0xef, 0x9e, 0xb8}}, {3, [3]byte{0xef, 0x9e, 0xb9}}, + {3, [3]byte{0xef, 0x9e, 0xba}}, {3, [3]byte{0xef, 0x9e, 0xbb}}, + {3, [3]byte{0xef, 0x9e, 0xbc}}, {3, [3]byte{0xef, 0x9e, 0xbd}}, + {3, [3]byte{0xef, 0x9e, 0xbe}}, {3, [3]byte{0xef, 0x9e, 0xbf}}, + {3, [3]byte{0xef, 0x9f, 0x80}}, {3, [3]byte{0xef, 0x9f, 0x81}}, + {3, [3]byte{0xef, 0x9f, 0x82}}, {3, [3]byte{0xef, 0x9f, 0x83}}, + {3, [3]byte{0xef, 0x9f, 0x84}}, {3, [3]byte{0xef, 0x9f, 0x85}}, + {3, [3]byte{0xef, 0x9f, 0x86}}, {3, [3]byte{0xef, 0x9f, 0x87}}, + {3, [3]byte{0xef, 0x9f, 0x88}}, {3, [3]byte{0xef, 0x9f, 0x89}}, + {3, [3]byte{0xef, 0x9f, 0x8a}}, {3, [3]byte{0xef, 0x9f, 0x8b}}, + {3, [3]byte{0xef, 0x9f, 0x8c}}, {3, [3]byte{0xef, 0x9f, 0x8d}}, + {3, [3]byte{0xef, 0x9f, 0x8e}}, {3, [3]byte{0xef, 0x9f, 0x8f}}, + {3, [3]byte{0xef, 0x9f, 0x90}}, {3, [3]byte{0xef, 0x9f, 0x91}}, + {3, [3]byte{0xef, 0x9f, 0x92}}, {3, [3]byte{0xef, 0x9f, 0x93}}, + {3, [3]byte{0xef, 0x9f, 0x94}}, {3, [3]byte{0xef, 0x9f, 0x95}}, + {3, [3]byte{0xef, 0x9f, 0x96}}, {3, [3]byte{0xef, 0x9f, 0x97}}, + {3, [3]byte{0xef, 0x9f, 0x98}}, {3, [3]byte{0xef, 0x9f, 0x99}}, + {3, [3]byte{0xef, 0x9f, 0x9a}}, {3, [3]byte{0xef, 0x9f, 0x9b}}, + {3, [3]byte{0xef, 0x9f, 0x9c}}, {3, [3]byte{0xef, 0x9f, 0x9d}}, + {3, [3]byte{0xef, 0x9f, 0x9e}}, {3, [3]byte{0xef, 0x9f, 0x9f}}, + {3, [3]byte{0xef, 0x9f, 0xa0}}, {3, [3]byte{0xef, 0x9f, 0xa1}}, + {3, [3]byte{0xef, 0x9f, 0xa2}}, {3, [3]byte{0xef, 0x9f, 0xa3}}, + {3, [3]byte{0xef, 0x9f, 0xa4}}, {3, [3]byte{0xef, 0x9f, 0xa5}}, + {3, [3]byte{0xef, 0x9f, 0xa6}}, {3, [3]byte{0xef, 0x9f, 0xa7}}, + {3, [3]byte{0xef, 0x9f, 0xa8}}, {3, [3]byte{0xef, 0x9f, 0xa9}}, + {3, [3]byte{0xef, 0x9f, 0xaa}}, {3, [3]byte{0xef, 0x9f, 0xab}}, + {3, [3]byte{0xef, 0x9f, 0xac}}, {3, [3]byte{0xef, 0x9f, 0xad}}, + {3, [3]byte{0xef, 0x9f, 0xae}}, {3, [3]byte{0xef, 0x9f, 0xaf}}, + {3, [3]byte{0xef, 0x9f, 0xb0}}, {3, [3]byte{0xef, 0x9f, 0xb1}}, + {3, [3]byte{0xef, 0x9f, 0xb2}}, {3, [3]byte{0xef, 0x9f, 0xb3}}, + {3, [3]byte{0xef, 0x9f, 0xb4}}, {3, [3]byte{0xef, 0x9f, 0xb5}}, + {3, [3]byte{0xef, 0x9f, 0xb6}}, {3, [3]byte{0xef, 0x9f, 0xb7}}, + {3, [3]byte{0xef, 0x9f, 0xb8}}, {3, [3]byte{0xef, 0x9f, 0xb9}}, + {3, [3]byte{0xef, 0x9f, 0xba}}, {3, [3]byte{0xef, 0x9f, 0xbb}}, + {3, [3]byte{0xef, 0x9f, 0xbc}}, {3, [3]byte{0xef, 0x9f, 0xbd}}, + {3, [3]byte{0xef, 0x9f, 0xbe}}, {3, [3]byte{0xef, 0x9f, 0xbf}}, + }, + encode: [256]uint32{ + 0x00000000, 0x01000001, 0x02000002, 0x03000003, 0x04000004, 0x05000005, 0x06000006, 0x07000007, + 0x08000008, 0x09000009, 0x0a00000a, 0x0b00000b, 0x0c00000c, 0x0d00000d, 0x0e00000e, 0x0f00000f, + 0x10000010, 0x11000011, 0x12000012, 0x13000013, 0x14000014, 0x15000015, 0x16000016, 0x17000017, + 0x18000018, 0x19000019, 0x1a00001a, 0x1b00001b, 0x1c00001c, 0x1d00001d, 0x1e00001e, 0x1f00001f, + 0x20000020, 0x21000021, 0x22000022, 0x23000023, 0x24000024, 0x25000025, 0x26000026, 0x27000027, + 0x28000028, 0x29000029, 0x2a00002a, 0x2b00002b, 0x2c00002c, 0x2d00002d, 0x2e00002e, 0x2f00002f, + 0x30000030, 0x31000031, 0x32000032, 0x33000033, 0x34000034, 0x35000035, 0x36000036, 0x37000037, + 0x38000038, 0x39000039, 0x3a00003a, 0x3b00003b, 0x3c00003c, 0x3d00003d, 0x3e00003e, 0x3f00003f, + 0x40000040, 0x41000041, 0x42000042, 0x43000043, 0x44000044, 0x45000045, 0x46000046, 0x47000047, + 0x48000048, 0x49000049, 0x4a00004a, 0x4b00004b, 0x4c00004c, 0x4d00004d, 0x4e00004e, 0x4f00004f, + 0x50000050, 0x51000051, 0x52000052, 0x53000053, 0x54000054, 0x55000055, 0x56000056, 0x57000057, + 0x58000058, 0x59000059, 0x5a00005a, 0x5b00005b, 0x5c00005c, 0x5d00005d, 0x5e00005e, 0x5f00005f, + 0x60000060, 0x61000061, 0x62000062, 0x63000063, 0x64000064, 0x65000065, 0x66000066, 0x67000067, + 0x68000068, 0x69000069, 0x6a00006a, 0x6b00006b, 0x6c00006c, 0x6d00006d, 0x6e00006e, 0x6f00006f, + 0x70000070, 0x71000071, 0x72000072, 0x73000073, 0x74000074, 0x75000075, 0x76000076, 0x77000077, + 0x78000078, 0x79000079, 0x7a00007a, 0x7b00007b, 0x7c00007c, 0x7d00007d, 0x7e00007e, 0x7f00007f, + 0x8000f780, 0x8100f781, 0x8200f782, 0x8300f783, 0x8400f784, 0x8500f785, 0x8600f786, 0x8700f787, + 0x8800f788, 0x8900f789, 0x8a00f78a, 0x8b00f78b, 0x8c00f78c, 0x8d00f78d, 0x8e00f78e, 0x8f00f78f, + 0x9000f790, 0x9100f791, 0x9200f792, 0x9300f793, 0x9400f794, 0x9500f795, 0x9600f796, 0x9700f797, + 0x9800f798, 0x9900f799, 0x9a00f79a, 0x9b00f79b, 0x9c00f79c, 0x9d00f79d, 0x9e00f79e, 0x9f00f79f, + 0xa000f7a0, 0xa100f7a1, 0xa200f7a2, 0xa300f7a3, 0xa400f7a4, 0xa500f7a5, 0xa600f7a6, 0xa700f7a7, + 0xa800f7a8, 0xa900f7a9, 0xaa00f7aa, 0xab00f7ab, 0xac00f7ac, 0xad00f7ad, 0xae00f7ae, 0xaf00f7af, + 0xb000f7b0, 0xb100f7b1, 0xb200f7b2, 0xb300f7b3, 0xb400f7b4, 0xb500f7b5, 0xb600f7b6, 0xb700f7b7, + 0xb800f7b8, 0xb900f7b9, 0xba00f7ba, 0xbb00f7bb, 0xbc00f7bc, 0xbd00f7bd, 0xbe00f7be, 0xbf00f7bf, + 0xc000f7c0, 0xc100f7c1, 0xc200f7c2, 0xc300f7c3, 0xc400f7c4, 0xc500f7c5, 0xc600f7c6, 0xc700f7c7, + 0xc800f7c8, 0xc900f7c9, 0xca00f7ca, 0xcb00f7cb, 0xcc00f7cc, 0xcd00f7cd, 0xce00f7ce, 0xcf00f7cf, + 0xd000f7d0, 0xd100f7d1, 0xd200f7d2, 0xd300f7d3, 0xd400f7d4, 0xd500f7d5, 0xd600f7d6, 0xd700f7d7, + 0xd800f7d8, 0xd900f7d9, 0xda00f7da, 0xdb00f7db, 0xdc00f7dc, 0xdd00f7dd, 0xde00f7de, 0xdf00f7df, + 0xe000f7e0, 0xe100f7e1, 0xe200f7e2, 0xe300f7e3, 0xe400f7e4, 0xe500f7e5, 0xe600f7e6, 0xe700f7e7, + 0xe800f7e8, 0xe900f7e9, 0xea00f7ea, 0xeb00f7eb, 0xec00f7ec, 0xed00f7ed, 0xee00f7ee, 0xef00f7ef, + 0xf000f7f0, 0xf100f7f1, 0xf200f7f2, 0xf300f7f3, 0xf400f7f4, 0xf500f7f5, 0xf600f7f6, 0xf700f7f7, + 0xf800f7f8, 0xf900f7f9, 0xfa00f7fa, 0xfb00f7fb, 0xfc00f7fc, 0xfd00f7fd, 0xfe00f7fe, 0xff00f7ff, + }, +} +var listAll = []encoding.Encoding{ + CodePage037, + CodePage437, + CodePage850, + CodePage852, + CodePage855, + CodePage858, + CodePage860, + CodePage862, + CodePage863, + CodePage865, + CodePage866, + CodePage1047, + CodePage1140, + ISO8859_1, + ISO8859_2, + ISO8859_3, + ISO8859_4, + ISO8859_5, + ISO8859_6, + ISO8859_6E, + ISO8859_6I, + ISO8859_7, + ISO8859_8, + ISO8859_8E, + ISO8859_8I, + ISO8859_9, + ISO8859_10, + ISO8859_13, + ISO8859_14, + ISO8859_15, + ISO8859_16, + KOI8R, + KOI8U, + Macintosh, + MacintoshCyrillic, + Windows874, + Windows1250, + Windows1251, + Windows1252, + Windows1253, + Windows1254, + Windows1255, + Windows1256, + Windows1257, + Windows1258, + XUserDefined, +} + +// Total table size 87024 bytes (84KiB); checksum: 811C9DC5 diff --git a/backend/vendor/golang.org/x/text/encoding/encoding.go b/backend/vendor/golang.org/x/text/encoding/encoding.go new file mode 100644 index 0000000..a0bd7cd --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/encoding.go @@ -0,0 +1,335 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package encoding defines an interface for character encodings, such as Shift +// JIS and Windows 1252, that can convert to and from UTF-8. +// +// Encoding implementations are provided in other packages, such as +// golang.org/x/text/encoding/charmap and +// golang.org/x/text/encoding/japanese. +package encoding // import "golang.org/x/text/encoding" + +import ( + "errors" + "io" + "strconv" + "unicode/utf8" + + "golang.org/x/text/encoding/internal/identifier" + "golang.org/x/text/transform" +) + +// TODO: +// - There seems to be some inconsistency in when decoders return errors +// and when not. Also documentation seems to suggest they shouldn't return +// errors at all (except for UTF-16). +// - Encoders seem to rely on or at least benefit from the input being in NFC +// normal form. Perhaps add an example how users could prepare their output. + +// Encoding is a character set encoding that can be transformed to and from +// UTF-8. +type Encoding interface { + // NewDecoder returns a Decoder. + NewDecoder() *Decoder + + // NewEncoder returns an Encoder. + NewEncoder() *Encoder +} + +// A Decoder converts bytes to UTF-8. It implements transform.Transformer. +// +// Transforming source bytes that are not of that encoding will not result in an +// error per se. Each byte that cannot be transcoded will be represented in the +// output by the UTF-8 encoding of '\uFFFD', the replacement rune. +type Decoder struct { + transform.Transformer + + // This forces external creators of Decoders to use names in struct + // initializers, allowing for future extendibility without having to break + // code. + _ struct{} +} + +// Bytes converts the given encoded bytes to UTF-8. It returns the converted +// bytes or nil, err if any error occurred. +func (d *Decoder) Bytes(b []byte) ([]byte, error) { + b, _, err := transform.Bytes(d, b) + if err != nil { + return nil, err + } + return b, nil +} + +// String converts the given encoded string to UTF-8. It returns the converted +// string or "", err if any error occurred. +func (d *Decoder) String(s string) (string, error) { + s, _, err := transform.String(d, s) + if err != nil { + return "", err + } + return s, nil +} + +// Reader wraps another Reader to decode its bytes. +// +// The Decoder may not be used for any other operation as long as the returned +// Reader is in use. +func (d *Decoder) Reader(r io.Reader) io.Reader { + return transform.NewReader(r, d) +} + +// An Encoder converts bytes from UTF-8. It implements transform.Transformer. +// +// Each rune that cannot be transcoded will result in an error. In this case, +// the transform will consume all source byte up to, not including the offending +// rune. Transforming source bytes that are not valid UTF-8 will be replaced by +// `\uFFFD`. To return early with an error instead, use transform.Chain to +// preprocess the data with a UTF8Validator. +type Encoder struct { + transform.Transformer + + // This forces external creators of Encoders to use names in struct + // initializers, allowing for future extendibility without having to break + // code. + _ struct{} +} + +// Bytes converts bytes from UTF-8. It returns the converted bytes or nil, err if +// any error occurred. +func (e *Encoder) Bytes(b []byte) ([]byte, error) { + b, _, err := transform.Bytes(e, b) + if err != nil { + return nil, err + } + return b, nil +} + +// String converts a string from UTF-8. It returns the converted string or +// "", err if any error occurred. +func (e *Encoder) String(s string) (string, error) { + s, _, err := transform.String(e, s) + if err != nil { + return "", err + } + return s, nil +} + +// Writer wraps another Writer to encode its UTF-8 output. +// +// The Encoder may not be used for any other operation as long as the returned +// Writer is in use. +func (e *Encoder) Writer(w io.Writer) io.Writer { + return transform.NewWriter(w, e) +} + +// ASCIISub is the ASCII substitute character, as recommended by +// https://unicode.org/reports/tr36/#Text_Comparison +const ASCIISub = '\x1a' + +// Nop is the nop encoding. Its transformed bytes are the same as the source +// bytes; it does not replace invalid UTF-8 sequences. +var Nop Encoding = nop{} + +type nop struct{} + +func (nop) NewDecoder() *Decoder { + return &Decoder{Transformer: transform.Nop} +} +func (nop) NewEncoder() *Encoder { + return &Encoder{Transformer: transform.Nop} +} + +// Replacement is the replacement encoding. Decoding from the replacement +// encoding yields a single '\uFFFD' replacement rune. Encoding from UTF-8 to +// the replacement encoding yields the same as the source bytes except that +// invalid UTF-8 is converted to '\uFFFD'. +// +// It is defined at http://encoding.spec.whatwg.org/#replacement +var Replacement Encoding = replacement{} + +type replacement struct{} + +func (replacement) NewDecoder() *Decoder { + return &Decoder{Transformer: replacementDecoder{}} +} + +func (replacement) NewEncoder() *Encoder { + return &Encoder{Transformer: replacementEncoder{}} +} + +func (replacement) ID() (mib identifier.MIB, other string) { + return identifier.Replacement, "" +} + +type replacementDecoder struct{ transform.NopResetter } + +func (replacementDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + if len(dst) < 3 { + return 0, 0, transform.ErrShortDst + } + if atEOF { + const fffd = "\ufffd" + dst[0] = fffd[0] + dst[1] = fffd[1] + dst[2] = fffd[2] + nDst = 3 + } + return nDst, len(src), nil +} + +type replacementEncoder struct{ transform.NopResetter } + +func (replacementEncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 + + for ; nSrc < len(src); nSrc += size { + r = rune(src[nSrc]) + + // Decode a 1-byte rune. + if r < utf8.RuneSelf { + size = 1 + + } else { + // Decode a multi-byte rune. + r, size = utf8.DecodeRune(src[nSrc:]) + if size == 1 { + // All valid runes of size 1 (those below utf8.RuneSelf) were + // handled above. We have invalid UTF-8 or we haven't seen the + // full character yet. + if !atEOF && !utf8.FullRune(src[nSrc:]) { + err = transform.ErrShortSrc + break + } + r = '\ufffd' + } + } + + if nDst+utf8.RuneLen(r) > len(dst) { + err = transform.ErrShortDst + break + } + nDst += utf8.EncodeRune(dst[nDst:], r) + } + return nDst, nSrc, err +} + +// HTMLEscapeUnsupported wraps encoders to replace source runes outside the +// repertoire of the destination encoding with HTML escape sequences. +// +// This wrapper exists to comply to URL and HTML forms requiring a +// non-terminating legacy encoder. The produced sequences may lead to data +// loss as they are indistinguishable from legitimate input. To avoid this +// issue, use UTF-8 encodings whenever possible. +func HTMLEscapeUnsupported(e *Encoder) *Encoder { + return &Encoder{Transformer: &errorHandler{e, errorToHTML}} +} + +// ReplaceUnsupported wraps encoders to replace source runes outside the +// repertoire of the destination encoding with an encoding-specific +// replacement. +// +// This wrapper is only provided for backwards compatibility and legacy +// handling. Its use is strongly discouraged. Use UTF-8 whenever possible. +func ReplaceUnsupported(e *Encoder) *Encoder { + return &Encoder{Transformer: &errorHandler{e, errorToReplacement}} +} + +type errorHandler struct { + *Encoder + handler func(dst []byte, r rune, err repertoireError) (n int, ok bool) +} + +// TODO: consider making this error public in some form. +type repertoireError interface { + Replacement() byte +} + +func (h errorHandler) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + nDst, nSrc, err = h.Transformer.Transform(dst, src, atEOF) + for err != nil { + rerr, ok := err.(repertoireError) + if !ok { + return nDst, nSrc, err + } + r, sz := utf8.DecodeRune(src[nSrc:]) + n, ok := h.handler(dst[nDst:], r, rerr) + if !ok { + return nDst, nSrc, transform.ErrShortDst + } + err = nil + nDst += n + if nSrc += sz; nSrc < len(src) { + var dn, sn int + dn, sn, err = h.Transformer.Transform(dst[nDst:], src[nSrc:], atEOF) + nDst += dn + nSrc += sn + } + } + return nDst, nSrc, err +} + +func errorToHTML(dst []byte, r rune, err repertoireError) (n int, ok bool) { + buf := [8]byte{} + b := strconv.AppendUint(buf[:0], uint64(r), 10) + if n = len(b) + len("&#;"); n >= len(dst) { + return 0, false + } + dst[0] = '&' + dst[1] = '#' + dst[copy(dst[2:], b)+2] = ';' + return n, true +} + +func errorToReplacement(dst []byte, r rune, err repertoireError) (n int, ok bool) { + if len(dst) == 0 { + return 0, false + } + dst[0] = err.Replacement() + return 1, true +} + +// ErrInvalidUTF8 means that a transformer encountered invalid UTF-8. +var ErrInvalidUTF8 = errors.New("encoding: invalid UTF-8") + +// UTF8Validator is a transformer that returns ErrInvalidUTF8 on the first +// input byte that is not valid UTF-8. +var UTF8Validator transform.Transformer = utf8Validator{} + +type utf8Validator struct{ transform.NopResetter } + +func (utf8Validator) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + n := len(src) + if n > len(dst) { + n = len(dst) + } + for i := 0; i < n; { + if c := src[i]; c < utf8.RuneSelf { + dst[i] = c + i++ + continue + } + _, size := utf8.DecodeRune(src[i:]) + if size == 1 { + // All valid runes of size 1 (those below utf8.RuneSelf) were + // handled above. We have invalid UTF-8 or we haven't seen the + // full character yet. + err = ErrInvalidUTF8 + if !atEOF && !utf8.FullRune(src[i:]) { + err = transform.ErrShortSrc + } + return i, i, err + } + if i+size > len(dst) { + return i, i, transform.ErrShortDst + } + for ; size > 0; size-- { + dst[i] = src[i] + i++ + } + } + if len(src) > len(dst) { + err = transform.ErrShortDst + } + return n, n, err +} diff --git a/backend/vendor/golang.org/x/text/encoding/htmlindex/htmlindex.go b/backend/vendor/golang.org/x/text/encoding/htmlindex/htmlindex.go new file mode 100644 index 0000000..bdc7d15 --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/htmlindex/htmlindex.go @@ -0,0 +1,86 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:generate go run gen.go + +// Package htmlindex maps character set encoding names to Encodings as +// recommended by the W3C for use in HTML 5. See http://www.w3.org/TR/encoding. +package htmlindex + +// TODO: perhaps have a "bare" version of the index (used by this package) that +// is not pre-loaded with all encodings. Global variables in encodings prevent +// the linker from being able to purge unneeded tables. This means that +// referencing all encodings, as this package does for the default index, links +// in all encodings unconditionally. +// +// This issue can be solved by either solving the linking issue (see +// https://github.com/golang/go/issues/6330) or refactoring the encoding tables +// (e.g. moving the tables to internal packages that do not use global +// variables). + +// TODO: allow canonicalizing names + +import ( + "errors" + "strings" + "sync" + + "golang.org/x/text/encoding" + "golang.org/x/text/encoding/internal/identifier" + "golang.org/x/text/language" +) + +var ( + errInvalidName = errors.New("htmlindex: invalid encoding name") + errUnknown = errors.New("htmlindex: unknown Encoding") + errUnsupported = errors.New("htmlindex: this encoding is not supported") +) + +var ( + matcherOnce sync.Once + matcher language.Matcher +) + +// LanguageDefault returns the canonical name of the default encoding for a +// given language. +func LanguageDefault(tag language.Tag) string { + matcherOnce.Do(func() { + tags := []language.Tag{} + for _, t := range strings.Split(locales, " ") { + tags = append(tags, language.MustParse(t)) + } + matcher = language.NewMatcher(tags, language.PreferSameScript(true)) + }) + _, i, _ := matcher.Match(tag) + return canonical[localeMap[i]] // Default is Windows-1252. +} + +// Get returns an Encoding for one of the names listed in +// http://www.w3.org/TR/encoding using the Default Index. Matching is case- +// insensitive. +func Get(name string) (encoding.Encoding, error) { + x, ok := nameMap[strings.ToLower(strings.TrimSpace(name))] + if !ok { + return nil, errInvalidName + } + return encodings[x], nil +} + +// Name reports the canonical name of the given Encoding. It will return +// an error if e is not associated with a supported encoding scheme. +func Name(e encoding.Encoding) (string, error) { + id, ok := e.(identifier.Interface) + if !ok { + return "", errUnknown + } + mib, _ := id.ID() + if mib == 0 { + return "", errUnknown + } + v, ok := mibMap[mib] + if !ok { + return "", errUnsupported + } + return canonical[v], nil +} diff --git a/backend/vendor/golang.org/x/text/encoding/htmlindex/map.go b/backend/vendor/golang.org/x/text/encoding/htmlindex/map.go new file mode 100644 index 0000000..c614390 --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/htmlindex/map.go @@ -0,0 +1,105 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package htmlindex + +import ( + "golang.org/x/text/encoding" + "golang.org/x/text/encoding/charmap" + "golang.org/x/text/encoding/internal/identifier" + "golang.org/x/text/encoding/japanese" + "golang.org/x/text/encoding/korean" + "golang.org/x/text/encoding/simplifiedchinese" + "golang.org/x/text/encoding/traditionalchinese" + "golang.org/x/text/encoding/unicode" +) + +// mibMap maps a MIB identifier to an htmlEncoding index. +var mibMap = map[identifier.MIB]htmlEncoding{ + identifier.UTF8: utf8, + identifier.UTF16BE: utf16be, + identifier.UTF16LE: utf16le, + identifier.IBM866: ibm866, + identifier.ISOLatin2: iso8859_2, + identifier.ISOLatin3: iso8859_3, + identifier.ISOLatin4: iso8859_4, + identifier.ISOLatinCyrillic: iso8859_5, + identifier.ISOLatinArabic: iso8859_6, + identifier.ISOLatinGreek: iso8859_7, + identifier.ISOLatinHebrew: iso8859_8, + identifier.ISO88598I: iso8859_8I, + identifier.ISOLatin6: iso8859_10, + identifier.ISO885913: iso8859_13, + identifier.ISO885914: iso8859_14, + identifier.ISO885915: iso8859_15, + identifier.ISO885916: iso8859_16, + identifier.KOI8R: koi8r, + identifier.KOI8U: koi8u, + identifier.Macintosh: macintosh, + identifier.MacintoshCyrillic: macintoshCyrillic, + identifier.Windows874: windows874, + identifier.Windows1250: windows1250, + identifier.Windows1251: windows1251, + identifier.Windows1252: windows1252, + identifier.Windows1253: windows1253, + identifier.Windows1254: windows1254, + identifier.Windows1255: windows1255, + identifier.Windows1256: windows1256, + identifier.Windows1257: windows1257, + identifier.Windows1258: windows1258, + identifier.XUserDefined: xUserDefined, + identifier.GBK: gbk, + identifier.GB18030: gb18030, + identifier.Big5: big5, + identifier.EUCPkdFmtJapanese: eucjp, + identifier.ISO2022JP: iso2022jp, + identifier.ShiftJIS: shiftJIS, + identifier.EUCKR: euckr, + identifier.Replacement: replacement, +} + +// encodings maps the internal htmlEncoding to an Encoding. +// TODO: consider using a reusable index in encoding/internal. +var encodings = [numEncodings]encoding.Encoding{ + utf8: unicode.UTF8, + ibm866: charmap.CodePage866, + iso8859_2: charmap.ISO8859_2, + iso8859_3: charmap.ISO8859_3, + iso8859_4: charmap.ISO8859_4, + iso8859_5: charmap.ISO8859_5, + iso8859_6: charmap.ISO8859_6, + iso8859_7: charmap.ISO8859_7, + iso8859_8: charmap.ISO8859_8, + iso8859_8I: charmap.ISO8859_8I, + iso8859_10: charmap.ISO8859_10, + iso8859_13: charmap.ISO8859_13, + iso8859_14: charmap.ISO8859_14, + iso8859_15: charmap.ISO8859_15, + iso8859_16: charmap.ISO8859_16, + koi8r: charmap.KOI8R, + koi8u: charmap.KOI8U, + macintosh: charmap.Macintosh, + windows874: charmap.Windows874, + windows1250: charmap.Windows1250, + windows1251: charmap.Windows1251, + windows1252: charmap.Windows1252, + windows1253: charmap.Windows1253, + windows1254: charmap.Windows1254, + windows1255: charmap.Windows1255, + windows1256: charmap.Windows1256, + windows1257: charmap.Windows1257, + windows1258: charmap.Windows1258, + macintoshCyrillic: charmap.MacintoshCyrillic, + gbk: simplifiedchinese.GBK, + gb18030: simplifiedchinese.GB18030, + big5: traditionalchinese.Big5, + eucjp: japanese.EUCJP, + iso2022jp: japanese.ISO2022JP, + shiftJIS: japanese.ShiftJIS, + euckr: korean.EUCKR, + replacement: encoding.Replacement, + utf16be: unicode.UTF16(unicode.BigEndian, unicode.IgnoreBOM), + utf16le: unicode.UTF16(unicode.LittleEndian, unicode.IgnoreBOM), + xUserDefined: charmap.XUserDefined, +} diff --git a/backend/vendor/golang.org/x/text/encoding/htmlindex/tables.go b/backend/vendor/golang.org/x/text/encoding/htmlindex/tables.go new file mode 100644 index 0000000..9e6daa8 --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/htmlindex/tables.go @@ -0,0 +1,362 @@ +// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT. + +package htmlindex + +type htmlEncoding byte + +const ( + utf8 htmlEncoding = iota + ibm866 + iso8859_2 + iso8859_3 + iso8859_4 + iso8859_5 + iso8859_6 + iso8859_7 + iso8859_8 + iso8859_8I + iso8859_10 + iso8859_13 + iso8859_14 + iso8859_15 + iso8859_16 + koi8r + koi8u + macintosh + windows874 + windows1250 + windows1251 + windows1252 + windows1253 + windows1254 + windows1255 + windows1256 + windows1257 + windows1258 + macintoshCyrillic + gbk + gb18030 + big5 + eucjp + iso2022jp + shiftJIS + euckr + replacement + utf16be + utf16le + xUserDefined + numEncodings +) + +var canonical = [numEncodings]string{ + "utf-8", + "ibm866", + "iso-8859-2", + "iso-8859-3", + "iso-8859-4", + "iso-8859-5", + "iso-8859-6", + "iso-8859-7", + "iso-8859-8", + "iso-8859-8-i", + "iso-8859-10", + "iso-8859-13", + "iso-8859-14", + "iso-8859-15", + "iso-8859-16", + "koi8-r", + "koi8-u", + "macintosh", + "windows-874", + "windows-1250", + "windows-1251", + "windows-1252", + "windows-1253", + "windows-1254", + "windows-1255", + "windows-1256", + "windows-1257", + "windows-1258", + "x-mac-cyrillic", + "gbk", + "gb18030", + "big5", + "euc-jp", + "iso-2022-jp", + "shift_jis", + "euc-kr", + "replacement", + "utf-16be", + "utf-16le", + "x-user-defined", +} + +var nameMap = map[string]htmlEncoding{ + "unicode-1-1-utf-8": utf8, + "unicode11utf8": utf8, + "unicode20utf8": utf8, + "utf-8": utf8, + "utf8": utf8, + "x-unicode20utf8": utf8, + "866": ibm866, + "cp866": ibm866, + "csibm866": ibm866, + "ibm866": ibm866, + "csisolatin2": iso8859_2, + "iso-8859-2": iso8859_2, + "iso-ir-101": iso8859_2, + "iso8859-2": iso8859_2, + "iso88592": iso8859_2, + "iso_8859-2": iso8859_2, + "iso_8859-2:1987": iso8859_2, + "l2": iso8859_2, + "latin2": iso8859_2, + "csisolatin3": iso8859_3, + "iso-8859-3": iso8859_3, + "iso-ir-109": iso8859_3, + "iso8859-3": iso8859_3, + "iso88593": iso8859_3, + "iso_8859-3": iso8859_3, + "iso_8859-3:1988": iso8859_3, + "l3": iso8859_3, + "latin3": iso8859_3, + "csisolatin4": iso8859_4, + "iso-8859-4": iso8859_4, + "iso-ir-110": iso8859_4, + "iso8859-4": iso8859_4, + "iso88594": iso8859_4, + "iso_8859-4": iso8859_4, + "iso_8859-4:1988": iso8859_4, + "l4": iso8859_4, + "latin4": iso8859_4, + "csisolatincyrillic": iso8859_5, + "cyrillic": iso8859_5, + "iso-8859-5": iso8859_5, + "iso-ir-144": iso8859_5, + "iso8859-5": iso8859_5, + "iso88595": iso8859_5, + "iso_8859-5": iso8859_5, + "iso_8859-5:1988": iso8859_5, + "arabic": iso8859_6, + "asmo-708": iso8859_6, + "csiso88596e": iso8859_6, + "csiso88596i": iso8859_6, + "csisolatinarabic": iso8859_6, + "ecma-114": iso8859_6, + "iso-8859-6": iso8859_6, + "iso-8859-6-e": iso8859_6, + "iso-8859-6-i": iso8859_6, + "iso-ir-127": iso8859_6, + "iso8859-6": iso8859_6, + "iso88596": iso8859_6, + "iso_8859-6": iso8859_6, + "iso_8859-6:1987": iso8859_6, + "csisolatingreek": iso8859_7, + "ecma-118": iso8859_7, + "elot_928": iso8859_7, + "greek": iso8859_7, + "greek8": iso8859_7, + "iso-8859-7": iso8859_7, + "iso-ir-126": iso8859_7, + "iso8859-7": iso8859_7, + "iso88597": iso8859_7, + "iso_8859-7": iso8859_7, + "iso_8859-7:1987": iso8859_7, + "sun_eu_greek": iso8859_7, + "csiso88598e": iso8859_8, + "csisolatinhebrew": iso8859_8, + "hebrew": iso8859_8, + "iso-8859-8": iso8859_8, + "iso-8859-8-e": iso8859_8, + "iso-ir-138": iso8859_8, + "iso8859-8": iso8859_8, + "iso88598": iso8859_8, + "iso_8859-8": iso8859_8, + "iso_8859-8:1988": iso8859_8, + "visual": iso8859_8, + "csiso88598i": iso8859_8I, + "iso-8859-8-i": iso8859_8I, + "logical": iso8859_8I, + "csisolatin6": iso8859_10, + "iso-8859-10": iso8859_10, + "iso-ir-157": iso8859_10, + "iso8859-10": iso8859_10, + "iso885910": iso8859_10, + "l6": iso8859_10, + "latin6": iso8859_10, + "iso-8859-13": iso8859_13, + "iso8859-13": iso8859_13, + "iso885913": iso8859_13, + "iso-8859-14": iso8859_14, + "iso8859-14": iso8859_14, + "iso885914": iso8859_14, + "csisolatin9": iso8859_15, + "iso-8859-15": iso8859_15, + "iso8859-15": iso8859_15, + "iso885915": iso8859_15, + "iso_8859-15": iso8859_15, + "l9": iso8859_15, + "iso-8859-16": iso8859_16, + "cskoi8r": koi8r, + "koi": koi8r, + "koi8": koi8r, + "koi8-r": koi8r, + "koi8_r": koi8r, + "koi8-ru": koi8u, + "koi8-u": koi8u, + "csmacintosh": macintosh, + "mac": macintosh, + "macintosh": macintosh, + "x-mac-roman": macintosh, + "dos-874": windows874, + "iso-8859-11": windows874, + "iso8859-11": windows874, + "iso885911": windows874, + "tis-620": windows874, + "windows-874": windows874, + "cp1250": windows1250, + "windows-1250": windows1250, + "x-cp1250": windows1250, + "cp1251": windows1251, + "windows-1251": windows1251, + "x-cp1251": windows1251, + "ansi_x3.4-1968": windows1252, + "ascii": windows1252, + "cp1252": windows1252, + "cp819": windows1252, + "csisolatin1": windows1252, + "ibm819": windows1252, + "iso-8859-1": windows1252, + "iso-ir-100": windows1252, + "iso8859-1": windows1252, + "iso88591": windows1252, + "iso_8859-1": windows1252, + "iso_8859-1:1987": windows1252, + "l1": windows1252, + "latin1": windows1252, + "us-ascii": windows1252, + "windows-1252": windows1252, + "x-cp1252": windows1252, + "cp1253": windows1253, + "windows-1253": windows1253, + "x-cp1253": windows1253, + "cp1254": windows1254, + "csisolatin5": windows1254, + "iso-8859-9": windows1254, + "iso-ir-148": windows1254, + "iso8859-9": windows1254, + "iso88599": windows1254, + "iso_8859-9": windows1254, + "iso_8859-9:1989": windows1254, + "l5": windows1254, + "latin5": windows1254, + "windows-1254": windows1254, + "x-cp1254": windows1254, + "cp1255": windows1255, + "windows-1255": windows1255, + "x-cp1255": windows1255, + "cp1256": windows1256, + "windows-1256": windows1256, + "x-cp1256": windows1256, + "cp1257": windows1257, + "windows-1257": windows1257, + "x-cp1257": windows1257, + "cp1258": windows1258, + "windows-1258": windows1258, + "x-cp1258": windows1258, + "x-mac-cyrillic": macintoshCyrillic, + "x-mac-ukrainian": macintoshCyrillic, + "chinese": gbk, + "csgb2312": gbk, + "csiso58gb231280": gbk, + "gb2312": gbk, + "gb_2312": gbk, + "gb_2312-80": gbk, + "gbk": gbk, + "iso-ir-58": gbk, + "x-gbk": gbk, + "gb18030": gb18030, + "big5": big5, + "big5-hkscs": big5, + "cn-big5": big5, + "csbig5": big5, + "x-x-big5": big5, + "cseucpkdfmtjapanese": eucjp, + "euc-jp": eucjp, + "x-euc-jp": eucjp, + "csiso2022jp": iso2022jp, + "iso-2022-jp": iso2022jp, + "csshiftjis": shiftJIS, + "ms932": shiftJIS, + "ms_kanji": shiftJIS, + "shift-jis": shiftJIS, + "shift_jis": shiftJIS, + "sjis": shiftJIS, + "windows-31j": shiftJIS, + "x-sjis": shiftJIS, + "cseuckr": euckr, + "csksc56011987": euckr, + "euc-kr": euckr, + "iso-ir-149": euckr, + "korean": euckr, + "ks_c_5601-1987": euckr, + "ks_c_5601-1989": euckr, + "ksc5601": euckr, + "ksc_5601": euckr, + "windows-949": euckr, + "csiso2022kr": replacement, + "hz-gb-2312": replacement, + "iso-2022-cn": replacement, + "iso-2022-cn-ext": replacement, + "iso-2022-kr": replacement, + "replacement": replacement, + "unicodefffe": utf16be, + "utf-16be": utf16be, + "csunicode": utf16le, + "iso-10646-ucs-2": utf16le, + "ucs-2": utf16le, + "unicode": utf16le, + "unicodefeff": utf16le, + "utf-16": utf16le, + "utf-16le": utf16le, + "x-user-defined": xUserDefined, +} + +var localeMap = []htmlEncoding{ + windows1252, // und_Latn + windows1256, // ar + windows1251, // ba + windows1251, // be + windows1251, // bg + windows1250, // cs + iso8859_7, // el + windows1257, // et + windows1256, // fa + windows1255, // he + windows1250, // hr + iso8859_2, // hu + shiftJIS, // ja + windows1251, // kk + euckr, // ko + windows1254, // ku + windows1251, // ky + windows1257, // lt + windows1257, // lv + windows1251, // mk + iso8859_2, // pl + windows1251, // ru + windows1251, // sah + windows1250, // sk + iso8859_2, // sl + windows1251, // sr + windows1251, // tg + windows874, // th + windows1254, // tr + windows1251, // tt + windows1251, // uk + windows1258, // vi + gb18030, // zh-hans + big5, // zh-hant +} + +const locales = "und_Latn ar ba be bg cs el et fa he hr hu ja kk ko ku ky lt lv mk pl ru sah sk sl sr tg th tr tt uk vi zh-hans zh-hant" diff --git a/backend/vendor/golang.org/x/text/encoding/internal/identifier/identifier.go b/backend/vendor/golang.org/x/text/encoding/internal/identifier/identifier.go new file mode 100644 index 0000000..5c9b85c --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/internal/identifier/identifier.go @@ -0,0 +1,81 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:generate go run gen.go + +// Package identifier defines the contract between implementations of Encoding +// and Index by defining identifiers that uniquely identify standardized coded +// character sets (CCS) and character encoding schemes (CES), which we will +// together refer to as encodings, for which Encoding implementations provide +// converters to and from UTF-8. This package is typically only of concern to +// implementers of Indexes and Encodings. +// +// One part of the identifier is the MIB code, which is defined by IANA and +// uniquely identifies a CCS or CES. Each code is associated with data that +// references authorities, official documentation as well as aliases and MIME +// names. +// +// Not all CESs are covered by the IANA registry. The "other" string that is +// returned by ID can be used to identify other character sets or versions of +// existing ones. +// +// It is recommended that each package that provides a set of Encodings provide +// the All and Common variables to reference all supported encodings and +// commonly used subset. This allows Index implementations to include all +// available encodings without explicitly referencing or knowing about them. +package identifier + +// Note: this package is internal, but could be made public if there is a need +// for writing third-party Indexes and Encodings. + +// References: +// - http://source.icu-project.org/repos/icu/icu/trunk/source/data/mappings/convrtrs.txt +// - http://www.iana.org/assignments/character-sets/character-sets.xhtml +// - http://www.iana.org/assignments/ianacharset-mib/ianacharset-mib +// - http://www.ietf.org/rfc/rfc2978.txt +// - https://www.unicode.org/reports/tr22/ +// - http://www.w3.org/TR/encoding/ +// - https://encoding.spec.whatwg.org/ +// - https://encoding.spec.whatwg.org/encodings.json +// - https://tools.ietf.org/html/rfc6657#section-5 + +// Interface can be implemented by Encodings to define the CCS or CES for which +// it implements conversions. +type Interface interface { + // ID returns an encoding identifier. Exactly one of the mib and other + // values should be non-zero. + // + // In the usual case it is only necessary to indicate the MIB code. The + // other string can be used to specify encodings for which there is no MIB, + // such as "x-mac-dingbat". + // + // The other string may only contain the characters a-z, A-Z, 0-9, - and _. + ID() (mib MIB, other string) + + // NOTE: the restrictions on the encoding are to allow extending the syntax + // with additional information such as versions, vendors and other variants. +} + +// A MIB identifies an encoding. It is derived from the IANA MIB codes and adds +// some identifiers for some encodings that are not covered by the IANA +// standard. +// +// See http://www.iana.org/assignments/ianacharset-mib. +type MIB uint16 + +// These additional MIB types are not defined in IANA. They are added because +// they are common and defined within the text repo. +const ( + // Unofficial marks the start of encodings not registered by IANA. + Unofficial MIB = 10000 + iota + + // Replacement is the WhatWG replacement encoding. + Replacement + + // XUserDefined is the code for x-user-defined. + XUserDefined + + // MacintoshCyrillic is the code for x-mac-cyrillic. + MacintoshCyrillic +) diff --git a/backend/vendor/golang.org/x/text/encoding/internal/identifier/mib.go b/backend/vendor/golang.org/x/text/encoding/internal/identifier/mib.go new file mode 100644 index 0000000..351fb86 --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/internal/identifier/mib.go @@ -0,0 +1,1627 @@ +// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT. + +package identifier + +const ( + // ASCII is the MIB identifier with IANA name US-ASCII (MIME: US-ASCII). + // + // ANSI X3.4-1986 + // Reference: RFC2046 + ASCII MIB = 3 + + // ISOLatin1 is the MIB identifier with IANA name ISO_8859-1:1987 (MIME: ISO-8859-1). + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISOLatin1 MIB = 4 + + // ISOLatin2 is the MIB identifier with IANA name ISO_8859-2:1987 (MIME: ISO-8859-2). + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISOLatin2 MIB = 5 + + // ISOLatin3 is the MIB identifier with IANA name ISO_8859-3:1988 (MIME: ISO-8859-3). + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISOLatin3 MIB = 6 + + // ISOLatin4 is the MIB identifier with IANA name ISO_8859-4:1988 (MIME: ISO-8859-4). + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISOLatin4 MIB = 7 + + // ISOLatinCyrillic is the MIB identifier with IANA name ISO_8859-5:1988 (MIME: ISO-8859-5). + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISOLatinCyrillic MIB = 8 + + // ISOLatinArabic is the MIB identifier with IANA name ISO_8859-6:1987 (MIME: ISO-8859-6). + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISOLatinArabic MIB = 9 + + // ISOLatinGreek is the MIB identifier with IANA name ISO_8859-7:1987 (MIME: ISO-8859-7). + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1947 + // Reference: RFC1345 + ISOLatinGreek MIB = 10 + + // ISOLatinHebrew is the MIB identifier with IANA name ISO_8859-8:1988 (MIME: ISO-8859-8). + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISOLatinHebrew MIB = 11 + + // ISOLatin5 is the MIB identifier with IANA name ISO_8859-9:1989 (MIME: ISO-8859-9). + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISOLatin5 MIB = 12 + + // ISOLatin6 is the MIB identifier with IANA name ISO-8859-10 (MIME: ISO-8859-10). + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISOLatin6 MIB = 13 + + // ISOTextComm is the MIB identifier with IANA name ISO_6937-2-add. + // + // ISO-IR: International Register of Escape Sequences and ISO 6937-2:1983 + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISOTextComm MIB = 14 + + // HalfWidthKatakana is the MIB identifier with IANA name JIS_X0201. + // + // JIS X 0201-1976. One byte only, this is equivalent to + // JIS/Roman (similar to ASCII) plus eight-bit half-width + // Katakana + // Reference: RFC1345 + HalfWidthKatakana MIB = 15 + + // JISEncoding is the MIB identifier with IANA name JIS_Encoding. + // + // JIS X 0202-1991. Uses ISO 2022 escape sequences to + // shift code sets as documented in JIS X 0202-1991. + JISEncoding MIB = 16 + + // ShiftJIS is the MIB identifier with IANA name Shift_JIS (MIME: Shift_JIS). + // + // This charset is an extension of csHalfWidthKatakana by + // adding graphic characters in JIS X 0208. The CCS's are + // JIS X0201:1997 and JIS X0208:1997. The + // complete definition is shown in Appendix 1 of JIS + // X0208:1997. + // This charset can be used for the top-level media type "text". + ShiftJIS MIB = 17 + + // EUCPkdFmtJapanese is the MIB identifier with IANA name Extended_UNIX_Code_Packed_Format_for_Japanese (MIME: EUC-JP). + // + // Standardized by OSF, UNIX International, and UNIX Systems + // Laboratories Pacific. Uses ISO 2022 rules to select + // code set 0: US-ASCII (a single 7-bit byte set) + // code set 1: JIS X0208-1990 (a double 8-bit byte set) + // restricted to A0-FF in both bytes + // code set 2: Half Width Katakana (a single 7-bit byte set) + // requiring SS2 as the character prefix + // code set 3: JIS X0212-1990 (a double 7-bit byte set) + // restricted to A0-FF in both bytes + // requiring SS3 as the character prefix + EUCPkdFmtJapanese MIB = 18 + + // EUCFixWidJapanese is the MIB identifier with IANA name Extended_UNIX_Code_Fixed_Width_for_Japanese. + // + // Used in Japan. Each character is 2 octets. + // code set 0: US-ASCII (a single 7-bit byte set) + // 1st byte = 00 + // 2nd byte = 20-7E + // code set 1: JIS X0208-1990 (a double 7-bit byte set) + // restricted to A0-FF in both bytes + // code set 2: Half Width Katakana (a single 7-bit byte set) + // 1st byte = 00 + // 2nd byte = A0-FF + // code set 3: JIS X0212-1990 (a double 7-bit byte set) + // restricted to A0-FF in + // the first byte + // and 21-7E in the second byte + EUCFixWidJapanese MIB = 19 + + // ISO4UnitedKingdom is the MIB identifier with IANA name BS_4730. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO4UnitedKingdom MIB = 20 + + // ISO11SwedishForNames is the MIB identifier with IANA name SEN_850200_C. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO11SwedishForNames MIB = 21 + + // ISO15Italian is the MIB identifier with IANA name IT. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO15Italian MIB = 22 + + // ISO17Spanish is the MIB identifier with IANA name ES. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO17Spanish MIB = 23 + + // ISO21German is the MIB identifier with IANA name DIN_66003. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO21German MIB = 24 + + // ISO60Norwegian1 is the MIB identifier with IANA name NS_4551-1. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO60Norwegian1 MIB = 25 + + // ISO69French is the MIB identifier with IANA name NF_Z_62-010. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO69French MIB = 26 + + // ISO10646UTF1 is the MIB identifier with IANA name ISO-10646-UTF-1. + // + // Universal Transfer Format (1), this is the multibyte + // encoding, that subsets ASCII-7. It does not have byte + // ordering issues. + ISO10646UTF1 MIB = 27 + + // ISO646basic1983 is the MIB identifier with IANA name ISO_646.basic:1983. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO646basic1983 MIB = 28 + + // INVARIANT is the MIB identifier with IANA name INVARIANT. + // + // Reference: RFC1345 + INVARIANT MIB = 29 + + // ISO2IntlRefVersion is the MIB identifier with IANA name ISO_646.irv:1983. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO2IntlRefVersion MIB = 30 + + // NATSSEFI is the MIB identifier with IANA name NATS-SEFI. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + NATSSEFI MIB = 31 + + // NATSSEFIADD is the MIB identifier with IANA name NATS-SEFI-ADD. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + NATSSEFIADD MIB = 32 + + // NATSDANO is the MIB identifier with IANA name NATS-DANO. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + NATSDANO MIB = 33 + + // NATSDANOADD is the MIB identifier with IANA name NATS-DANO-ADD. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + NATSDANOADD MIB = 34 + + // ISO10Swedish is the MIB identifier with IANA name SEN_850200_B. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO10Swedish MIB = 35 + + // KSC56011987 is the MIB identifier with IANA name KS_C_5601-1987. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + KSC56011987 MIB = 36 + + // ISO2022KR is the MIB identifier with IANA name ISO-2022-KR (MIME: ISO-2022-KR). + // + // rfc1557 (see also KS_C_5601-1987) + // Reference: RFC1557 + ISO2022KR MIB = 37 + + // EUCKR is the MIB identifier with IANA name EUC-KR (MIME: EUC-KR). + // + // rfc1557 (see also KS_C_5861-1992) + // Reference: RFC1557 + EUCKR MIB = 38 + + // ISO2022JP is the MIB identifier with IANA name ISO-2022-JP (MIME: ISO-2022-JP). + // + // rfc1468 (see also rfc2237 ) + // Reference: RFC1468 + ISO2022JP MIB = 39 + + // ISO2022JP2 is the MIB identifier with IANA name ISO-2022-JP-2 (MIME: ISO-2022-JP-2). + // + // rfc1554 + // Reference: RFC1554 + ISO2022JP2 MIB = 40 + + // ISO13JISC6220jp is the MIB identifier with IANA name JIS_C6220-1969-jp. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO13JISC6220jp MIB = 41 + + // ISO14JISC6220ro is the MIB identifier with IANA name JIS_C6220-1969-ro. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO14JISC6220ro MIB = 42 + + // ISO16Portuguese is the MIB identifier with IANA name PT. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO16Portuguese MIB = 43 + + // ISO18Greek7Old is the MIB identifier with IANA name greek7-old. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO18Greek7Old MIB = 44 + + // ISO19LatinGreek is the MIB identifier with IANA name latin-greek. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO19LatinGreek MIB = 45 + + // ISO25French is the MIB identifier with IANA name NF_Z_62-010_(1973). + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO25French MIB = 46 + + // ISO27LatinGreek1 is the MIB identifier with IANA name Latin-greek-1. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO27LatinGreek1 MIB = 47 + + // ISO5427Cyrillic is the MIB identifier with IANA name ISO_5427. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO5427Cyrillic MIB = 48 + + // ISO42JISC62261978 is the MIB identifier with IANA name JIS_C6226-1978. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO42JISC62261978 MIB = 49 + + // ISO47BSViewdata is the MIB identifier with IANA name BS_viewdata. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO47BSViewdata MIB = 50 + + // ISO49INIS is the MIB identifier with IANA name INIS. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO49INIS MIB = 51 + + // ISO50INIS8 is the MIB identifier with IANA name INIS-8. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO50INIS8 MIB = 52 + + // ISO51INISCyrillic is the MIB identifier with IANA name INIS-cyrillic. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO51INISCyrillic MIB = 53 + + // ISO54271981 is the MIB identifier with IANA name ISO_5427:1981. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO54271981 MIB = 54 + + // ISO5428Greek is the MIB identifier with IANA name ISO_5428:1980. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO5428Greek MIB = 55 + + // ISO57GB1988 is the MIB identifier with IANA name GB_1988-80. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO57GB1988 MIB = 56 + + // ISO58GB231280 is the MIB identifier with IANA name GB_2312-80. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO58GB231280 MIB = 57 + + // ISO61Norwegian2 is the MIB identifier with IANA name NS_4551-2. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO61Norwegian2 MIB = 58 + + // ISO70VideotexSupp1 is the MIB identifier with IANA name videotex-suppl. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO70VideotexSupp1 MIB = 59 + + // ISO84Portuguese2 is the MIB identifier with IANA name PT2. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO84Portuguese2 MIB = 60 + + // ISO85Spanish2 is the MIB identifier with IANA name ES2. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO85Spanish2 MIB = 61 + + // ISO86Hungarian is the MIB identifier with IANA name MSZ_7795.3. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO86Hungarian MIB = 62 + + // ISO87JISX0208 is the MIB identifier with IANA name JIS_C6226-1983. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO87JISX0208 MIB = 63 + + // ISO88Greek7 is the MIB identifier with IANA name greek7. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO88Greek7 MIB = 64 + + // ISO89ASMO449 is the MIB identifier with IANA name ASMO_449. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO89ASMO449 MIB = 65 + + // ISO90 is the MIB identifier with IANA name iso-ir-90. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO90 MIB = 66 + + // ISO91JISC62291984a is the MIB identifier with IANA name JIS_C6229-1984-a. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO91JISC62291984a MIB = 67 + + // ISO92JISC62991984b is the MIB identifier with IANA name JIS_C6229-1984-b. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO92JISC62991984b MIB = 68 + + // ISO93JIS62291984badd is the MIB identifier with IANA name JIS_C6229-1984-b-add. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO93JIS62291984badd MIB = 69 + + // ISO94JIS62291984hand is the MIB identifier with IANA name JIS_C6229-1984-hand. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO94JIS62291984hand MIB = 70 + + // ISO95JIS62291984handadd is the MIB identifier with IANA name JIS_C6229-1984-hand-add. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO95JIS62291984handadd MIB = 71 + + // ISO96JISC62291984kana is the MIB identifier with IANA name JIS_C6229-1984-kana. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO96JISC62291984kana MIB = 72 + + // ISO2033 is the MIB identifier with IANA name ISO_2033-1983. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO2033 MIB = 73 + + // ISO99NAPLPS is the MIB identifier with IANA name ANSI_X3.110-1983. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO99NAPLPS MIB = 74 + + // ISO102T617bit is the MIB identifier with IANA name T.61-7bit. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO102T617bit MIB = 75 + + // ISO103T618bit is the MIB identifier with IANA name T.61-8bit. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO103T618bit MIB = 76 + + // ISO111ECMACyrillic is the MIB identifier with IANA name ECMA-cyrillic. + // + // ISO registry + ISO111ECMACyrillic MIB = 77 + + // ISO121Canadian1 is the MIB identifier with IANA name CSA_Z243.4-1985-1. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO121Canadian1 MIB = 78 + + // ISO122Canadian2 is the MIB identifier with IANA name CSA_Z243.4-1985-2. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO122Canadian2 MIB = 79 + + // ISO123CSAZ24341985gr is the MIB identifier with IANA name CSA_Z243.4-1985-gr. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO123CSAZ24341985gr MIB = 80 + + // ISO88596E is the MIB identifier with IANA name ISO_8859-6-E (MIME: ISO-8859-6-E). + // + // rfc1556 + // Reference: RFC1556 + ISO88596E MIB = 81 + + // ISO88596I is the MIB identifier with IANA name ISO_8859-6-I (MIME: ISO-8859-6-I). + // + // rfc1556 + // Reference: RFC1556 + ISO88596I MIB = 82 + + // ISO128T101G2 is the MIB identifier with IANA name T.101-G2. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO128T101G2 MIB = 83 + + // ISO88598E is the MIB identifier with IANA name ISO_8859-8-E (MIME: ISO-8859-8-E). + // + // rfc1556 + // Reference: RFC1556 + ISO88598E MIB = 84 + + // ISO88598I is the MIB identifier with IANA name ISO_8859-8-I (MIME: ISO-8859-8-I). + // + // rfc1556 + // Reference: RFC1556 + ISO88598I MIB = 85 + + // ISO139CSN369103 is the MIB identifier with IANA name CSN_369103. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO139CSN369103 MIB = 86 + + // ISO141JUSIB1002 is the MIB identifier with IANA name JUS_I.B1.002. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO141JUSIB1002 MIB = 87 + + // ISO143IECP271 is the MIB identifier with IANA name IEC_P27-1. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO143IECP271 MIB = 88 + + // ISO146Serbian is the MIB identifier with IANA name JUS_I.B1.003-serb. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO146Serbian MIB = 89 + + // ISO147Macedonian is the MIB identifier with IANA name JUS_I.B1.003-mac. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO147Macedonian MIB = 90 + + // ISO150GreekCCITT is the MIB identifier with IANA name greek-ccitt. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO150GreekCCITT MIB = 91 + + // ISO151Cuba is the MIB identifier with IANA name NC_NC00-10:81. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO151Cuba MIB = 92 + + // ISO6937Add is the MIB identifier with IANA name ISO_6937-2-25. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO6937Add MIB = 93 + + // ISO153GOST1976874 is the MIB identifier with IANA name GOST_19768-74. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO153GOST1976874 MIB = 94 + + // ISO8859Supp is the MIB identifier with IANA name ISO_8859-supp. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO8859Supp MIB = 95 + + // ISO10367Box is the MIB identifier with IANA name ISO_10367-box. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO10367Box MIB = 96 + + // ISO158Lap is the MIB identifier with IANA name latin-lap. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO158Lap MIB = 97 + + // ISO159JISX02121990 is the MIB identifier with IANA name JIS_X0212-1990. + // + // ISO-IR: International Register of Escape Sequences + // Note: The current registration authority is IPSJ/ITSCJ, Japan. + // Reference: RFC1345 + ISO159JISX02121990 MIB = 98 + + // ISO646Danish is the MIB identifier with IANA name DS_2089. + // + // Danish Standard, DS 2089, February 1974 + // Reference: RFC1345 + ISO646Danish MIB = 99 + + // USDK is the MIB identifier with IANA name us-dk. + // + // Reference: RFC1345 + USDK MIB = 100 + + // DKUS is the MIB identifier with IANA name dk-us. + // + // Reference: RFC1345 + DKUS MIB = 101 + + // KSC5636 is the MIB identifier with IANA name KSC5636. + // + // Reference: RFC1345 + KSC5636 MIB = 102 + + // Unicode11UTF7 is the MIB identifier with IANA name UNICODE-1-1-UTF-7. + // + // rfc1642 + // Reference: RFC1642 + Unicode11UTF7 MIB = 103 + + // ISO2022CN is the MIB identifier with IANA name ISO-2022-CN. + // + // rfc1922 + // Reference: RFC1922 + ISO2022CN MIB = 104 + + // ISO2022CNEXT is the MIB identifier with IANA name ISO-2022-CN-EXT. + // + // rfc1922 + // Reference: RFC1922 + ISO2022CNEXT MIB = 105 + + // UTF8 is the MIB identifier with IANA name UTF-8. + // + // rfc3629 + // Reference: RFC3629 + UTF8 MIB = 106 + + // ISO885913 is the MIB identifier with IANA name ISO-8859-13. + // + // ISO See https://www.iana.org/assignments/charset-reg/ISO-8859-13 https://www.iana.org/assignments/charset-reg/ISO-8859-13 + ISO885913 MIB = 109 + + // ISO885914 is the MIB identifier with IANA name ISO-8859-14. + // + // ISO See https://www.iana.org/assignments/charset-reg/ISO-8859-14 + ISO885914 MIB = 110 + + // ISO885915 is the MIB identifier with IANA name ISO-8859-15. + // + // ISO + // Please see: https://www.iana.org/assignments/charset-reg/ISO-8859-15 + ISO885915 MIB = 111 + + // ISO885916 is the MIB identifier with IANA name ISO-8859-16. + // + // ISO + ISO885916 MIB = 112 + + // GBK is the MIB identifier with IANA name GBK. + // + // Chinese IT Standardization Technical Committee + // Please see: https://www.iana.org/assignments/charset-reg/GBK + GBK MIB = 113 + + // GB18030 is the MIB identifier with IANA name GB18030. + // + // Chinese IT Standardization Technical Committee + // Please see: https://www.iana.org/assignments/charset-reg/GB18030 + GB18030 MIB = 114 + + // OSDEBCDICDF0415 is the MIB identifier with IANA name OSD_EBCDIC_DF04_15. + // + // Fujitsu-Siemens standard mainframe EBCDIC encoding + // Please see: https://www.iana.org/assignments/charset-reg/OSD-EBCDIC-DF04-15 + OSDEBCDICDF0415 MIB = 115 + + // OSDEBCDICDF03IRV is the MIB identifier with IANA name OSD_EBCDIC_DF03_IRV. + // + // Fujitsu-Siemens standard mainframe EBCDIC encoding + // Please see: https://www.iana.org/assignments/charset-reg/OSD-EBCDIC-DF03-IRV + OSDEBCDICDF03IRV MIB = 116 + + // OSDEBCDICDF041 is the MIB identifier with IANA name OSD_EBCDIC_DF04_1. + // + // Fujitsu-Siemens standard mainframe EBCDIC encoding + // Please see: https://www.iana.org/assignments/charset-reg/OSD-EBCDIC-DF04-1 + OSDEBCDICDF041 MIB = 117 + + // ISO115481 is the MIB identifier with IANA name ISO-11548-1. + // + // See https://www.iana.org/assignments/charset-reg/ISO-11548-1 + ISO115481 MIB = 118 + + // KZ1048 is the MIB identifier with IANA name KZ-1048. + // + // See https://www.iana.org/assignments/charset-reg/KZ-1048 + KZ1048 MIB = 119 + + // Unicode is the MIB identifier with IANA name ISO-10646-UCS-2. + // + // the 2-octet Basic Multilingual Plane, aka Unicode + // this needs to specify network byte order: the standard + // does not specify (it is a 16-bit integer space) + Unicode MIB = 1000 + + // UCS4 is the MIB identifier with IANA name ISO-10646-UCS-4. + // + // the full code space. (same comment about byte order, + // these are 31-bit numbers. + UCS4 MIB = 1001 + + // UnicodeASCII is the MIB identifier with IANA name ISO-10646-UCS-Basic. + // + // ASCII subset of Unicode. Basic Latin = collection 1 + // See ISO 10646, Appendix A + UnicodeASCII MIB = 1002 + + // UnicodeLatin1 is the MIB identifier with IANA name ISO-10646-Unicode-Latin1. + // + // ISO Latin-1 subset of Unicode. Basic Latin and Latin-1 + // Supplement = collections 1 and 2. See ISO 10646, + // Appendix A. See rfc1815 . + UnicodeLatin1 MIB = 1003 + + // UnicodeJapanese is the MIB identifier with IANA name ISO-10646-J-1. + // + // ISO 10646 Japanese, see rfc1815 . + UnicodeJapanese MIB = 1004 + + // UnicodeIBM1261 is the MIB identifier with IANA name ISO-Unicode-IBM-1261. + // + // IBM Latin-2, -3, -5, Extended Presentation Set, GCSGID: 1261 + UnicodeIBM1261 MIB = 1005 + + // UnicodeIBM1268 is the MIB identifier with IANA name ISO-Unicode-IBM-1268. + // + // IBM Latin-4 Extended Presentation Set, GCSGID: 1268 + UnicodeIBM1268 MIB = 1006 + + // UnicodeIBM1276 is the MIB identifier with IANA name ISO-Unicode-IBM-1276. + // + // IBM Cyrillic Greek Extended Presentation Set, GCSGID: 1276 + UnicodeIBM1276 MIB = 1007 + + // UnicodeIBM1264 is the MIB identifier with IANA name ISO-Unicode-IBM-1264. + // + // IBM Arabic Presentation Set, GCSGID: 1264 + UnicodeIBM1264 MIB = 1008 + + // UnicodeIBM1265 is the MIB identifier with IANA name ISO-Unicode-IBM-1265. + // + // IBM Hebrew Presentation Set, GCSGID: 1265 + UnicodeIBM1265 MIB = 1009 + + // Unicode11 is the MIB identifier with IANA name UNICODE-1-1. + // + // rfc1641 + // Reference: RFC1641 + Unicode11 MIB = 1010 + + // SCSU is the MIB identifier with IANA name SCSU. + // + // SCSU See https://www.iana.org/assignments/charset-reg/SCSU + SCSU MIB = 1011 + + // UTF7 is the MIB identifier with IANA name UTF-7. + // + // rfc2152 + // Reference: RFC2152 + UTF7 MIB = 1012 + + // UTF16BE is the MIB identifier with IANA name UTF-16BE. + // + // rfc2781 + // Reference: RFC2781 + UTF16BE MIB = 1013 + + // UTF16LE is the MIB identifier with IANA name UTF-16LE. + // + // rfc2781 + // Reference: RFC2781 + UTF16LE MIB = 1014 + + // UTF16 is the MIB identifier with IANA name UTF-16. + // + // rfc2781 + // Reference: RFC2781 + UTF16 MIB = 1015 + + // CESU8 is the MIB identifier with IANA name CESU-8. + // + // https://www.unicode.org/reports/tr26 + CESU8 MIB = 1016 + + // UTF32 is the MIB identifier with IANA name UTF-32. + // + // https://www.unicode.org/reports/tr19/ + UTF32 MIB = 1017 + + // UTF32BE is the MIB identifier with IANA name UTF-32BE. + // + // https://www.unicode.org/reports/tr19/ + UTF32BE MIB = 1018 + + // UTF32LE is the MIB identifier with IANA name UTF-32LE. + // + // https://www.unicode.org/reports/tr19/ + UTF32LE MIB = 1019 + + // BOCU1 is the MIB identifier with IANA name BOCU-1. + // + // https://www.unicode.org/notes/tn6/ + BOCU1 MIB = 1020 + + // UTF7IMAP is the MIB identifier with IANA name UTF-7-IMAP. + // + // Note: This charset is used to encode Unicode in IMAP mailbox names; + // see section 5.1.3 of rfc3501 . It should never be used + // outside this context. A name has been assigned so that charset processing + // implementations can refer to it in a consistent way. + UTF7IMAP MIB = 1021 + + // Windows30Latin1 is the MIB identifier with IANA name ISO-8859-1-Windows-3.0-Latin-1. + // + // Extended ISO 8859-1 Latin-1 for Windows 3.0. + // PCL Symbol Set id: 9U + Windows30Latin1 MIB = 2000 + + // Windows31Latin1 is the MIB identifier with IANA name ISO-8859-1-Windows-3.1-Latin-1. + // + // Extended ISO 8859-1 Latin-1 for Windows 3.1. + // PCL Symbol Set id: 19U + Windows31Latin1 MIB = 2001 + + // Windows31Latin2 is the MIB identifier with IANA name ISO-8859-2-Windows-Latin-2. + // + // Extended ISO 8859-2. Latin-2 for Windows 3.1. + // PCL Symbol Set id: 9E + Windows31Latin2 MIB = 2002 + + // Windows31Latin5 is the MIB identifier with IANA name ISO-8859-9-Windows-Latin-5. + // + // Extended ISO 8859-9. Latin-5 for Windows 3.1 + // PCL Symbol Set id: 5T + Windows31Latin5 MIB = 2003 + + // HPRoman8 is the MIB identifier with IANA name hp-roman8. + // + // LaserJet IIP Printer User's Manual, + // HP part no 33471-90901, Hewlet-Packard, June 1989. + // Reference: RFC1345 + HPRoman8 MIB = 2004 + + // AdobeStandardEncoding is the MIB identifier with IANA name Adobe-Standard-Encoding. + // + // PostScript Language Reference Manual + // PCL Symbol Set id: 10J + AdobeStandardEncoding MIB = 2005 + + // VenturaUS is the MIB identifier with IANA name Ventura-US. + // + // Ventura US. ASCII plus characters typically used in + // publishing, like pilcrow, copyright, registered, trade mark, + // section, dagger, and double dagger in the range A0 (hex) + // to FF (hex). + // PCL Symbol Set id: 14J + VenturaUS MIB = 2006 + + // VenturaInternational is the MIB identifier with IANA name Ventura-International. + // + // Ventura International. ASCII plus coded characters similar + // to Roman8. + // PCL Symbol Set id: 13J + VenturaInternational MIB = 2007 + + // DECMCS is the MIB identifier with IANA name DEC-MCS. + // + // VAX/VMS User's Manual, + // Order Number: AI-Y517A-TE, April 1986. + // Reference: RFC1345 + DECMCS MIB = 2008 + + // PC850Multilingual is the MIB identifier with IANA name IBM850. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + PC850Multilingual MIB = 2009 + + // PC8DanishNorwegian is the MIB identifier with IANA name PC8-Danish-Norwegian. + // + // PC Danish Norwegian + // 8-bit PC set for Danish Norwegian + // PCL Symbol Set id: 11U + PC8DanishNorwegian MIB = 2012 + + // PC862LatinHebrew is the MIB identifier with IANA name IBM862. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + PC862LatinHebrew MIB = 2013 + + // PC8Turkish is the MIB identifier with IANA name PC8-Turkish. + // + // PC Latin Turkish. PCL Symbol Set id: 9T + PC8Turkish MIB = 2014 + + // IBMSymbols is the MIB identifier with IANA name IBM-Symbols. + // + // Presentation Set, CPGID: 259 + IBMSymbols MIB = 2015 + + // IBMThai is the MIB identifier with IANA name IBM-Thai. + // + // Presentation Set, CPGID: 838 + IBMThai MIB = 2016 + + // HPLegal is the MIB identifier with IANA name HP-Legal. + // + // PCL 5 Comparison Guide, Hewlett-Packard, + // HP part number 5961-0510, October 1992 + // PCL Symbol Set id: 1U + HPLegal MIB = 2017 + + // HPPiFont is the MIB identifier with IANA name HP-Pi-font. + // + // PCL 5 Comparison Guide, Hewlett-Packard, + // HP part number 5961-0510, October 1992 + // PCL Symbol Set id: 15U + HPPiFont MIB = 2018 + + // HPMath8 is the MIB identifier with IANA name HP-Math8. + // + // PCL 5 Comparison Guide, Hewlett-Packard, + // HP part number 5961-0510, October 1992 + // PCL Symbol Set id: 8M + HPMath8 MIB = 2019 + + // HPPSMath is the MIB identifier with IANA name Adobe-Symbol-Encoding. + // + // PostScript Language Reference Manual + // PCL Symbol Set id: 5M + HPPSMath MIB = 2020 + + // HPDesktop is the MIB identifier with IANA name HP-DeskTop. + // + // PCL 5 Comparison Guide, Hewlett-Packard, + // HP part number 5961-0510, October 1992 + // PCL Symbol Set id: 7J + HPDesktop MIB = 2021 + + // VenturaMath is the MIB identifier with IANA name Ventura-Math. + // + // PCL 5 Comparison Guide, Hewlett-Packard, + // HP part number 5961-0510, October 1992 + // PCL Symbol Set id: 6M + VenturaMath MIB = 2022 + + // MicrosoftPublishing is the MIB identifier with IANA name Microsoft-Publishing. + // + // PCL 5 Comparison Guide, Hewlett-Packard, + // HP part number 5961-0510, October 1992 + // PCL Symbol Set id: 6J + MicrosoftPublishing MIB = 2023 + + // Windows31J is the MIB identifier with IANA name Windows-31J. + // + // Windows Japanese. A further extension of Shift_JIS + // to include NEC special characters (Row 13), NEC + // selection of IBM extensions (Rows 89 to 92), and IBM + // extensions (Rows 115 to 119). The CCS's are + // JIS X0201:1997, JIS X0208:1997, and these extensions. + // This charset can be used for the top-level media type "text", + // but it is of limited or specialized use (see rfc2278 ). + // PCL Symbol Set id: 19K + Windows31J MIB = 2024 + + // GB2312 is the MIB identifier with IANA name GB2312 (MIME: GB2312). + // + // Chinese for People's Republic of China (PRC) mixed one byte, + // two byte set: + // 20-7E = one byte ASCII + // A1-FE = two byte PRC Kanji + // See GB 2312-80 + // PCL Symbol Set Id: 18C + GB2312 MIB = 2025 + + // Big5 is the MIB identifier with IANA name Big5 (MIME: Big5). + // + // Chinese for Taiwan Multi-byte set. + // PCL Symbol Set Id: 18T + Big5 MIB = 2026 + + // Macintosh is the MIB identifier with IANA name macintosh. + // + // The Unicode Standard ver1.0, ISBN 0-201-56788-1, Oct 1991 + // Reference: RFC1345 + Macintosh MIB = 2027 + + // IBM037 is the MIB identifier with IANA name IBM037. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM037 MIB = 2028 + + // IBM038 is the MIB identifier with IANA name IBM038. + // + // IBM 3174 Character Set Ref, GA27-3831-02, March 1990 + // Reference: RFC1345 + IBM038 MIB = 2029 + + // IBM273 is the MIB identifier with IANA name IBM273. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM273 MIB = 2030 + + // IBM274 is the MIB identifier with IANA name IBM274. + // + // IBM 3174 Character Set Ref, GA27-3831-02, March 1990 + // Reference: RFC1345 + IBM274 MIB = 2031 + + // IBM275 is the MIB identifier with IANA name IBM275. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM275 MIB = 2032 + + // IBM277 is the MIB identifier with IANA name IBM277. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM277 MIB = 2033 + + // IBM278 is the MIB identifier with IANA name IBM278. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM278 MIB = 2034 + + // IBM280 is the MIB identifier with IANA name IBM280. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM280 MIB = 2035 + + // IBM281 is the MIB identifier with IANA name IBM281. + // + // IBM 3174 Character Set Ref, GA27-3831-02, March 1990 + // Reference: RFC1345 + IBM281 MIB = 2036 + + // IBM284 is the MIB identifier with IANA name IBM284. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM284 MIB = 2037 + + // IBM285 is the MIB identifier with IANA name IBM285. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM285 MIB = 2038 + + // IBM290 is the MIB identifier with IANA name IBM290. + // + // IBM 3174 Character Set Ref, GA27-3831-02, March 1990 + // Reference: RFC1345 + IBM290 MIB = 2039 + + // IBM297 is the MIB identifier with IANA name IBM297. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM297 MIB = 2040 + + // IBM420 is the MIB identifier with IANA name IBM420. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990, + // IBM NLS RM p 11-11 + // Reference: RFC1345 + IBM420 MIB = 2041 + + // IBM423 is the MIB identifier with IANA name IBM423. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM423 MIB = 2042 + + // IBM424 is the MIB identifier with IANA name IBM424. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM424 MIB = 2043 + + // PC8CodePage437 is the MIB identifier with IANA name IBM437. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + PC8CodePage437 MIB = 2011 + + // IBM500 is the MIB identifier with IANA name IBM500. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM500 MIB = 2044 + + // IBM851 is the MIB identifier with IANA name IBM851. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM851 MIB = 2045 + + // PCp852 is the MIB identifier with IANA name IBM852. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + PCp852 MIB = 2010 + + // IBM855 is the MIB identifier with IANA name IBM855. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM855 MIB = 2046 + + // IBM857 is the MIB identifier with IANA name IBM857. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM857 MIB = 2047 + + // IBM860 is the MIB identifier with IANA name IBM860. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM860 MIB = 2048 + + // IBM861 is the MIB identifier with IANA name IBM861. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM861 MIB = 2049 + + // IBM863 is the MIB identifier with IANA name IBM863. + // + // IBM Keyboard layouts and code pages, PN 07G4586 June 1991 + // Reference: RFC1345 + IBM863 MIB = 2050 + + // IBM864 is the MIB identifier with IANA name IBM864. + // + // IBM Keyboard layouts and code pages, PN 07G4586 June 1991 + // Reference: RFC1345 + IBM864 MIB = 2051 + + // IBM865 is the MIB identifier with IANA name IBM865. + // + // IBM DOS 3.3 Ref (Abridged), 94X9575 (Feb 1987) + // Reference: RFC1345 + IBM865 MIB = 2052 + + // IBM868 is the MIB identifier with IANA name IBM868. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM868 MIB = 2053 + + // IBM869 is the MIB identifier with IANA name IBM869. + // + // IBM Keyboard layouts and code pages, PN 07G4586 June 1991 + // Reference: RFC1345 + IBM869 MIB = 2054 + + // IBM870 is the MIB identifier with IANA name IBM870. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM870 MIB = 2055 + + // IBM871 is the MIB identifier with IANA name IBM871. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM871 MIB = 2056 + + // IBM880 is the MIB identifier with IANA name IBM880. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM880 MIB = 2057 + + // IBM891 is the MIB identifier with IANA name IBM891. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM891 MIB = 2058 + + // IBM903 is the MIB identifier with IANA name IBM903. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM903 MIB = 2059 + + // IBBM904 is the MIB identifier with IANA name IBM904. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBBM904 MIB = 2060 + + // IBM905 is the MIB identifier with IANA name IBM905. + // + // IBM 3174 Character Set Ref, GA27-3831-02, March 1990 + // Reference: RFC1345 + IBM905 MIB = 2061 + + // IBM918 is the MIB identifier with IANA name IBM918. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM918 MIB = 2062 + + // IBM1026 is the MIB identifier with IANA name IBM1026. + // + // IBM NLS RM Vol2 SE09-8002-01, March 1990 + // Reference: RFC1345 + IBM1026 MIB = 2063 + + // IBMEBCDICATDE is the MIB identifier with IANA name EBCDIC-AT-DE. + // + // IBM 3270 Char Set Ref Ch 10, GA27-2837-9, April 1987 + // Reference: RFC1345 + IBMEBCDICATDE MIB = 2064 + + // EBCDICATDEA is the MIB identifier with IANA name EBCDIC-AT-DE-A. + // + // IBM 3270 Char Set Ref Ch 10, GA27-2837-9, April 1987 + // Reference: RFC1345 + EBCDICATDEA MIB = 2065 + + // EBCDICCAFR is the MIB identifier with IANA name EBCDIC-CA-FR. + // + // IBM 3270 Char Set Ref Ch 10, GA27-2837-9, April 1987 + // Reference: RFC1345 + EBCDICCAFR MIB = 2066 + + // EBCDICDKNO is the MIB identifier with IANA name EBCDIC-DK-NO. + // + // IBM 3270 Char Set Ref Ch 10, GA27-2837-9, April 1987 + // Reference: RFC1345 + EBCDICDKNO MIB = 2067 + + // EBCDICDKNOA is the MIB identifier with IANA name EBCDIC-DK-NO-A. + // + // IBM 3270 Char Set Ref Ch 10, GA27-2837-9, April 1987 + // Reference: RFC1345 + EBCDICDKNOA MIB = 2068 + + // EBCDICFISE is the MIB identifier with IANA name EBCDIC-FI-SE. + // + // IBM 3270 Char Set Ref Ch 10, GA27-2837-9, April 1987 + // Reference: RFC1345 + EBCDICFISE MIB = 2069 + + // EBCDICFISEA is the MIB identifier with IANA name EBCDIC-FI-SE-A. + // + // IBM 3270 Char Set Ref Ch 10, GA27-2837-9, April 1987 + // Reference: RFC1345 + EBCDICFISEA MIB = 2070 + + // EBCDICFR is the MIB identifier with IANA name EBCDIC-FR. + // + // IBM 3270 Char Set Ref Ch 10, GA27-2837-9, April 1987 + // Reference: RFC1345 + EBCDICFR MIB = 2071 + + // EBCDICIT is the MIB identifier with IANA name EBCDIC-IT. + // + // IBM 3270 Char Set Ref Ch 10, GA27-2837-9, April 1987 + // Reference: RFC1345 + EBCDICIT MIB = 2072 + + // EBCDICPT is the MIB identifier with IANA name EBCDIC-PT. + // + // IBM 3270 Char Set Ref Ch 10, GA27-2837-9, April 1987 + // Reference: RFC1345 + EBCDICPT MIB = 2073 + + // EBCDICES is the MIB identifier with IANA name EBCDIC-ES. + // + // IBM 3270 Char Set Ref Ch 10, GA27-2837-9, April 1987 + // Reference: RFC1345 + EBCDICES MIB = 2074 + + // EBCDICESA is the MIB identifier with IANA name EBCDIC-ES-A. + // + // IBM 3270 Char Set Ref Ch 10, GA27-2837-9, April 1987 + // Reference: RFC1345 + EBCDICESA MIB = 2075 + + // EBCDICESS is the MIB identifier with IANA name EBCDIC-ES-S. + // + // IBM 3270 Char Set Ref Ch 10, GA27-2837-9, April 1987 + // Reference: RFC1345 + EBCDICESS MIB = 2076 + + // EBCDICUK is the MIB identifier with IANA name EBCDIC-UK. + // + // IBM 3270 Char Set Ref Ch 10, GA27-2837-9, April 1987 + // Reference: RFC1345 + EBCDICUK MIB = 2077 + + // EBCDICUS is the MIB identifier with IANA name EBCDIC-US. + // + // IBM 3270 Char Set Ref Ch 10, GA27-2837-9, April 1987 + // Reference: RFC1345 + EBCDICUS MIB = 2078 + + // Unknown8BiT is the MIB identifier with IANA name UNKNOWN-8BIT. + // + // Reference: RFC1428 + Unknown8BiT MIB = 2079 + + // Mnemonic is the MIB identifier with IANA name MNEMONIC. + // + // rfc1345 , also known as "mnemonic+ascii+38" + // Reference: RFC1345 + Mnemonic MIB = 2080 + + // Mnem is the MIB identifier with IANA name MNEM. + // + // rfc1345 , also known as "mnemonic+ascii+8200" + // Reference: RFC1345 + Mnem MIB = 2081 + + // VISCII is the MIB identifier with IANA name VISCII. + // + // rfc1456 + // Reference: RFC1456 + VISCII MIB = 2082 + + // VIQR is the MIB identifier with IANA name VIQR. + // + // rfc1456 + // Reference: RFC1456 + VIQR MIB = 2083 + + // KOI8R is the MIB identifier with IANA name KOI8-R (MIME: KOI8-R). + // + // rfc1489 , based on GOST-19768-74, ISO-6937/8, + // INIS-Cyrillic, ISO-5427. + // Reference: RFC1489 + KOI8R MIB = 2084 + + // HZGB2312 is the MIB identifier with IANA name HZ-GB-2312. + // + // rfc1842 , rfc1843 rfc1843 rfc1842 + HZGB2312 MIB = 2085 + + // IBM866 is the MIB identifier with IANA name IBM866. + // + // IBM NLDG Volume 2 (SE09-8002-03) August 1994 + IBM866 MIB = 2086 + + // PC775Baltic is the MIB identifier with IANA name IBM775. + // + // HP PCL 5 Comparison Guide (P/N 5021-0329) pp B-13, 1996 + PC775Baltic MIB = 2087 + + // KOI8U is the MIB identifier with IANA name KOI8-U. + // + // rfc2319 + // Reference: RFC2319 + KOI8U MIB = 2088 + + // IBM00858 is the MIB identifier with IANA name IBM00858. + // + // IBM See https://www.iana.org/assignments/charset-reg/IBM00858 + IBM00858 MIB = 2089 + + // IBM00924 is the MIB identifier with IANA name IBM00924. + // + // IBM See https://www.iana.org/assignments/charset-reg/IBM00924 + IBM00924 MIB = 2090 + + // IBM01140 is the MIB identifier with IANA name IBM01140. + // + // IBM See https://www.iana.org/assignments/charset-reg/IBM01140 + IBM01140 MIB = 2091 + + // IBM01141 is the MIB identifier with IANA name IBM01141. + // + // IBM See https://www.iana.org/assignments/charset-reg/IBM01141 + IBM01141 MIB = 2092 + + // IBM01142 is the MIB identifier with IANA name IBM01142. + // + // IBM See https://www.iana.org/assignments/charset-reg/IBM01142 + IBM01142 MIB = 2093 + + // IBM01143 is the MIB identifier with IANA name IBM01143. + // + // IBM See https://www.iana.org/assignments/charset-reg/IBM01143 + IBM01143 MIB = 2094 + + // IBM01144 is the MIB identifier with IANA name IBM01144. + // + // IBM See https://www.iana.org/assignments/charset-reg/IBM01144 + IBM01144 MIB = 2095 + + // IBM01145 is the MIB identifier with IANA name IBM01145. + // + // IBM See https://www.iana.org/assignments/charset-reg/IBM01145 + IBM01145 MIB = 2096 + + // IBM01146 is the MIB identifier with IANA name IBM01146. + // + // IBM See https://www.iana.org/assignments/charset-reg/IBM01146 + IBM01146 MIB = 2097 + + // IBM01147 is the MIB identifier with IANA name IBM01147. + // + // IBM See https://www.iana.org/assignments/charset-reg/IBM01147 + IBM01147 MIB = 2098 + + // IBM01148 is the MIB identifier with IANA name IBM01148. + // + // IBM See https://www.iana.org/assignments/charset-reg/IBM01148 + IBM01148 MIB = 2099 + + // IBM01149 is the MIB identifier with IANA name IBM01149. + // + // IBM See https://www.iana.org/assignments/charset-reg/IBM01149 + IBM01149 MIB = 2100 + + // Big5HKSCS is the MIB identifier with IANA name Big5-HKSCS. + // + // See https://www.iana.org/assignments/charset-reg/Big5-HKSCS + Big5HKSCS MIB = 2101 + + // IBM1047 is the MIB identifier with IANA name IBM1047. + // + // IBM1047 (EBCDIC Latin 1/Open Systems) https://www-1.ibm.com/servers/eserver/iseries/software/globalization/pdf/cp01047z.pdf + IBM1047 MIB = 2102 + + // PTCP154 is the MIB identifier with IANA name PTCP154. + // + // See https://www.iana.org/assignments/charset-reg/PTCP154 + PTCP154 MIB = 2103 + + // Amiga1251 is the MIB identifier with IANA name Amiga-1251. + // + // See https://www.amiga.ultranet.ru/Amiga-1251.html + Amiga1251 MIB = 2104 + + // KOI7switched is the MIB identifier with IANA name KOI7-switched. + // + // See https://www.iana.org/assignments/charset-reg/KOI7-switched + KOI7switched MIB = 2105 + + // BRF is the MIB identifier with IANA name BRF. + // + // See https://www.iana.org/assignments/charset-reg/BRF + BRF MIB = 2106 + + // TSCII is the MIB identifier with IANA name TSCII. + // + // See https://www.iana.org/assignments/charset-reg/TSCII + TSCII MIB = 2107 + + // CP51932 is the MIB identifier with IANA name CP51932. + // + // See https://www.iana.org/assignments/charset-reg/CP51932 + CP51932 MIB = 2108 + + // Windows874 is the MIB identifier with IANA name windows-874. + // + // See https://www.iana.org/assignments/charset-reg/windows-874 + Windows874 MIB = 2109 + + // Windows1250 is the MIB identifier with IANA name windows-1250. + // + // Microsoft https://www.iana.org/assignments/charset-reg/windows-1250 + Windows1250 MIB = 2250 + + // Windows1251 is the MIB identifier with IANA name windows-1251. + // + // Microsoft https://www.iana.org/assignments/charset-reg/windows-1251 + Windows1251 MIB = 2251 + + // Windows1252 is the MIB identifier with IANA name windows-1252. + // + // Microsoft https://www.iana.org/assignments/charset-reg/windows-1252 + Windows1252 MIB = 2252 + + // Windows1253 is the MIB identifier with IANA name windows-1253. + // + // Microsoft https://www.iana.org/assignments/charset-reg/windows-1253 + Windows1253 MIB = 2253 + + // Windows1254 is the MIB identifier with IANA name windows-1254. + // + // Microsoft https://www.iana.org/assignments/charset-reg/windows-1254 + Windows1254 MIB = 2254 + + // Windows1255 is the MIB identifier with IANA name windows-1255. + // + // Microsoft https://www.iana.org/assignments/charset-reg/windows-1255 + Windows1255 MIB = 2255 + + // Windows1256 is the MIB identifier with IANA name windows-1256. + // + // Microsoft https://www.iana.org/assignments/charset-reg/windows-1256 + Windows1256 MIB = 2256 + + // Windows1257 is the MIB identifier with IANA name windows-1257. + // + // Microsoft https://www.iana.org/assignments/charset-reg/windows-1257 + Windows1257 MIB = 2257 + + // Windows1258 is the MIB identifier with IANA name windows-1258. + // + // Microsoft https://www.iana.org/assignments/charset-reg/windows-1258 + Windows1258 MIB = 2258 + + // TIS620 is the MIB identifier with IANA name TIS-620. + // + // Thai Industrial Standards Institute (TISI) + TIS620 MIB = 2259 + + // CP50220 is the MIB identifier with IANA name CP50220. + // + // See https://www.iana.org/assignments/charset-reg/CP50220 + CP50220 MIB = 2260 +) diff --git a/backend/vendor/golang.org/x/text/encoding/internal/internal.go b/backend/vendor/golang.org/x/text/encoding/internal/internal.go new file mode 100644 index 0000000..413e6fc --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/internal/internal.go @@ -0,0 +1,75 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package internal contains code that is shared among encoding implementations. +package internal + +import ( + "golang.org/x/text/encoding" + "golang.org/x/text/encoding/internal/identifier" + "golang.org/x/text/transform" +) + +// Encoding is an implementation of the Encoding interface that adds the String +// and ID methods to an existing encoding. +type Encoding struct { + encoding.Encoding + Name string + MIB identifier.MIB +} + +// _ verifies that Encoding implements identifier.Interface. +var _ identifier.Interface = (*Encoding)(nil) + +func (e *Encoding) String() string { + return e.Name +} + +func (e *Encoding) ID() (mib identifier.MIB, other string) { + return e.MIB, "" +} + +// SimpleEncoding is an Encoding that combines two Transformers. +type SimpleEncoding struct { + Decoder transform.Transformer + Encoder transform.Transformer +} + +func (e *SimpleEncoding) NewDecoder() *encoding.Decoder { + return &encoding.Decoder{Transformer: e.Decoder} +} + +func (e *SimpleEncoding) NewEncoder() *encoding.Encoder { + return &encoding.Encoder{Transformer: e.Encoder} +} + +// FuncEncoding is an Encoding that combines two functions returning a new +// Transformer. +type FuncEncoding struct { + Decoder func() transform.Transformer + Encoder func() transform.Transformer +} + +func (e FuncEncoding) NewDecoder() *encoding.Decoder { + return &encoding.Decoder{Transformer: e.Decoder()} +} + +func (e FuncEncoding) NewEncoder() *encoding.Encoder { + return &encoding.Encoder{Transformer: e.Encoder()} +} + +// A RepertoireError indicates a rune is not in the repertoire of a destination +// encoding. It is associated with an encoding-specific suggested replacement +// byte. +type RepertoireError byte + +// Error implements the error interface. +func (r RepertoireError) Error() string { + return "encoding: rune not supported by encoding." +} + +// Replacement returns the replacement string associated with this error. +func (r RepertoireError) Replacement() byte { return byte(r) } + +var ErrASCIIReplacement = RepertoireError(encoding.ASCIISub) diff --git a/backend/vendor/golang.org/x/text/encoding/japanese/all.go b/backend/vendor/golang.org/x/text/encoding/japanese/all.go new file mode 100644 index 0000000..6cfa8de --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/japanese/all.go @@ -0,0 +1,12 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package japanese + +import ( + "golang.org/x/text/encoding" +) + +// All is a list of all defined encodings in this package. +var All = []encoding.Encoding{EUCJP, ISO2022JP, ShiftJIS} diff --git a/backend/vendor/golang.org/x/text/encoding/japanese/eucjp.go b/backend/vendor/golang.org/x/text/encoding/japanese/eucjp.go new file mode 100644 index 0000000..79313fa --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/japanese/eucjp.go @@ -0,0 +1,225 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package japanese + +import ( + "unicode/utf8" + + "golang.org/x/text/encoding" + "golang.org/x/text/encoding/internal" + "golang.org/x/text/encoding/internal/identifier" + "golang.org/x/text/transform" +) + +// EUCJP is the EUC-JP encoding. +var EUCJP encoding.Encoding = &eucJP + +var eucJP = internal.Encoding{ + &internal.SimpleEncoding{eucJPDecoder{}, eucJPEncoder{}}, + "EUC-JP", + identifier.EUCPkdFmtJapanese, +} + +type eucJPDecoder struct{ transform.NopResetter } + +// See https://encoding.spec.whatwg.org/#euc-jp-decoder. +func (eucJPDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 +loop: + for ; nSrc < len(src); nSrc += size { + switch c0 := src[nSrc]; { + case c0 < utf8.RuneSelf: + r, size = rune(c0), 1 + + case c0 == 0x8e: + if nSrc+1 >= len(src) { + if !atEOF { + err = transform.ErrShortSrc + break loop + } + r, size = utf8.RuneError, 1 + break + } + c1 := src[nSrc+1] + switch { + case c1 < 0xa1: + r, size = utf8.RuneError, 1 + case c1 > 0xdf: + r, size = utf8.RuneError, 2 + if c1 == 0xff { + size = 1 + } + default: + r, size = rune(c1)+(0xff61-0xa1), 2 + } + case c0 == 0x8f: + if nSrc+2 >= len(src) { + if !atEOF { + err = transform.ErrShortSrc + break loop + } + r, size = utf8.RuneError, 1 + if p := nSrc + 1; p < len(src) && 0xa1 <= src[p] && src[p] < 0xfe { + size = 2 + } + break + } + c1 := src[nSrc+1] + if c1 < 0xa1 || 0xfe < c1 { + r, size = utf8.RuneError, 1 + break + } + c2 := src[nSrc+2] + if c2 < 0xa1 || 0xfe < c2 { + r, size = utf8.RuneError, 2 + break + } + r, size = utf8.RuneError, 3 + if i := int(c1-0xa1)*94 + int(c2-0xa1); i < len(jis0212Decode) { + r = rune(jis0212Decode[i]) + if r == 0 { + r = utf8.RuneError + } + } + + case 0xa1 <= c0 && c0 <= 0xfe: + if nSrc+1 >= len(src) { + if !atEOF { + err = transform.ErrShortSrc + break loop + } + r, size = utf8.RuneError, 1 + break + } + c1 := src[nSrc+1] + if c1 < 0xa1 || 0xfe < c1 { + r, size = utf8.RuneError, 1 + break + } + r, size = utf8.RuneError, 2 + if i := int(c0-0xa1)*94 + int(c1-0xa1); i < len(jis0208Decode) { + r = rune(jis0208Decode[i]) + if r == 0 { + r = utf8.RuneError + } + } + + default: + r, size = utf8.RuneError, 1 + } + + if nDst+utf8.RuneLen(r) > len(dst) { + err = transform.ErrShortDst + break loop + } + nDst += utf8.EncodeRune(dst[nDst:], r) + } + return nDst, nSrc, err +} + +type eucJPEncoder struct{ transform.NopResetter } + +func (eucJPEncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 + for ; nSrc < len(src); nSrc += size { + r = rune(src[nSrc]) + + // Decode a 1-byte rune. + if r < utf8.RuneSelf { + size = 1 + + } else { + // Decode a multi-byte rune. + r, size = utf8.DecodeRune(src[nSrc:]) + if size == 1 { + // All valid runes of size 1 (those below utf8.RuneSelf) were + // handled above. We have invalid UTF-8 or we haven't seen the + // full character yet. + if !atEOF && !utf8.FullRune(src[nSrc:]) { + err = transform.ErrShortSrc + break + } + } + + // func init checks that the switch covers all tables. + switch { + case encode0Low <= r && r < encode0High: + if r = rune(encode0[r-encode0Low]); r != 0 { + goto write2or3 + } + case encode1Low <= r && r < encode1High: + if r = rune(encode1[r-encode1Low]); r != 0 { + goto write2or3 + } + case encode2Low <= r && r < encode2High: + if r = rune(encode2[r-encode2Low]); r != 0 { + goto write2or3 + } + case encode3Low <= r && r < encode3High: + if r = rune(encode3[r-encode3Low]); r != 0 { + goto write2or3 + } + case encode4Low <= r && r < encode4High: + if r = rune(encode4[r-encode4Low]); r != 0 { + goto write2or3 + } + case encode5Low <= r && r < encode5High: + if 0xff61 <= r && r < 0xffa0 { + goto write2 + } + if r = rune(encode5[r-encode5Low]); r != 0 { + goto write2or3 + } + } + err = internal.ErrASCIIReplacement + break + } + + if nDst >= len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst] = uint8(r) + nDst++ + continue + + write2or3: + if r>>tableShift == jis0208 { + if nDst+2 > len(dst) { + err = transform.ErrShortDst + break + } + } else { + if nDst+3 > len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst] = 0x8f + nDst++ + } + dst[nDst+0] = 0xa1 + uint8(r>>codeShift)&codeMask + dst[nDst+1] = 0xa1 + uint8(r)&codeMask + nDst += 2 + continue + + write2: + if nDst+2 > len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst+0] = 0x8e + dst[nDst+1] = uint8(r - (0xff61 - 0xa1)) + nDst += 2 + continue + } + return nDst, nSrc, err +} + +func init() { + // Check that the hard-coded encode switch covers all tables. + if numEncodeTables != 6 { + panic("bad numEncodeTables") + } +} diff --git a/backend/vendor/golang.org/x/text/encoding/japanese/iso2022jp.go b/backend/vendor/golang.org/x/text/encoding/japanese/iso2022jp.go new file mode 100644 index 0000000..613226d --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/japanese/iso2022jp.go @@ -0,0 +1,299 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package japanese + +import ( + "unicode/utf8" + + "golang.org/x/text/encoding" + "golang.org/x/text/encoding/internal" + "golang.org/x/text/encoding/internal/identifier" + "golang.org/x/text/transform" +) + +// ISO2022JP is the ISO-2022-JP encoding. +var ISO2022JP encoding.Encoding = &iso2022JP + +var iso2022JP = internal.Encoding{ + internal.FuncEncoding{iso2022JPNewDecoder, iso2022JPNewEncoder}, + "ISO-2022-JP", + identifier.ISO2022JP, +} + +func iso2022JPNewDecoder() transform.Transformer { + return new(iso2022JPDecoder) +} + +func iso2022JPNewEncoder() transform.Transformer { + return new(iso2022JPEncoder) +} + +const ( + asciiState = iota + katakanaState + jis0208State + jis0212State +) + +const asciiEsc = 0x1b + +type iso2022JPDecoder int + +func (d *iso2022JPDecoder) Reset() { + *d = asciiState +} + +func (d *iso2022JPDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 + for ; nSrc < len(src); nSrc += size { + c0 := src[nSrc] + if c0 >= utf8.RuneSelf { + r, size = '\ufffd', 1 + goto write + } + + if c0 == asciiEsc { + if nSrc+2 >= len(src) { + if !atEOF { + return nDst, nSrc, transform.ErrShortSrc + } + // TODO: is it correct to only skip 1?? + r, size = '\ufffd', 1 + goto write + } + size = 3 + c1 := src[nSrc+1] + c2 := src[nSrc+2] + switch { + case c1 == '$' && (c2 == '@' || c2 == 'B'): // 0x24 {0x40, 0x42} + *d = jis0208State + continue + case c1 == '$' && c2 == '(': // 0x24 0x28 + if nSrc+3 >= len(src) { + if !atEOF { + return nDst, nSrc, transform.ErrShortSrc + } + r, size = '\ufffd', 1 + goto write + } + size = 4 + if src[nSrc+3] == 'D' { + *d = jis0212State + continue + } + case c1 == '(' && (c2 == 'B' || c2 == 'J'): // 0x28 {0x42, 0x4A} + *d = asciiState + continue + case c1 == '(' && c2 == 'I': // 0x28 0x49 + *d = katakanaState + continue + } + r, size = '\ufffd', 1 + goto write + } + + switch *d { + case asciiState: + r, size = rune(c0), 1 + + case katakanaState: + if c0 < 0x21 || 0x60 <= c0 { + r, size = '\ufffd', 1 + goto write + } + r, size = rune(c0)+(0xff61-0x21), 1 + + default: + if c0 == 0x0a { + *d = asciiState + r, size = rune(c0), 1 + goto write + } + if nSrc+1 >= len(src) { + if !atEOF { + return nDst, nSrc, transform.ErrShortSrc + } + r, size = '\ufffd', 1 + goto write + } + size = 2 + c1 := src[nSrc+1] + i := int(c0-0x21)*94 + int(c1-0x21) + if *d == jis0208State && i < len(jis0208Decode) { + r = rune(jis0208Decode[i]) + } else if *d == jis0212State && i < len(jis0212Decode) { + r = rune(jis0212Decode[i]) + } else { + r = '\ufffd' + goto write + } + if r == 0 { + r = '\ufffd' + } + } + + write: + if nDst+utf8.RuneLen(r) > len(dst) { + return nDst, nSrc, transform.ErrShortDst + } + nDst += utf8.EncodeRune(dst[nDst:], r) + } + return nDst, nSrc, err +} + +type iso2022JPEncoder int + +func (e *iso2022JPEncoder) Reset() { + *e = asciiState +} + +func (e *iso2022JPEncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 + for ; nSrc < len(src); nSrc += size { + r = rune(src[nSrc]) + + // Decode a 1-byte rune. + if r < utf8.RuneSelf { + size = 1 + + } else { + // Decode a multi-byte rune. + r, size = utf8.DecodeRune(src[nSrc:]) + if size == 1 { + // All valid runes of size 1 (those below utf8.RuneSelf) were + // handled above. We have invalid UTF-8 or we haven't seen the + // full character yet. + if !atEOF && !utf8.FullRune(src[nSrc:]) { + err = transform.ErrShortSrc + break + } + } + + // func init checks that the switch covers all tables. + // + // http://encoding.spec.whatwg.org/#iso-2022-jp says that "the index jis0212 + // is not used by the iso-2022-jp encoder due to lack of widespread support". + // + // TODO: do we have to special-case U+00A5 and U+203E, as per + // http://encoding.spec.whatwg.org/#iso-2022-jp + // Doing so would mean that "\u00a5" would not be preserved + // after an encode-decode round trip. + switch { + case encode0Low <= r && r < encode0High: + if r = rune(encode0[r-encode0Low]); r>>tableShift == jis0208 { + goto writeJIS + } + case encode1Low <= r && r < encode1High: + if r = rune(encode1[r-encode1Low]); r>>tableShift == jis0208 { + goto writeJIS + } + case encode2Low <= r && r < encode2High: + if r = rune(encode2[r-encode2Low]); r>>tableShift == jis0208 { + goto writeJIS + } + case encode3Low <= r && r < encode3High: + if r = rune(encode3[r-encode3Low]); r>>tableShift == jis0208 { + goto writeJIS + } + case encode4Low <= r && r < encode4High: + if r = rune(encode4[r-encode4Low]); r>>tableShift == jis0208 { + goto writeJIS + } + case encode5Low <= r && r < encode5High: + if 0xff61 <= r && r < 0xffa0 { + goto writeKatakana + } + if r = rune(encode5[r-encode5Low]); r>>tableShift == jis0208 { + goto writeJIS + } + } + + // Switch back to ASCII state in case of error so that an ASCII + // replacement character can be written in the correct state. + if *e != asciiState { + if nDst+3 > len(dst) { + err = transform.ErrShortDst + break + } + *e = asciiState + dst[nDst+0] = asciiEsc + dst[nDst+1] = '(' + dst[nDst+2] = 'B' + nDst += 3 + } + err = internal.ErrASCIIReplacement + break + } + + if *e != asciiState { + if nDst+4 > len(dst) { + err = transform.ErrShortDst + break + } + *e = asciiState + dst[nDst+0] = asciiEsc + dst[nDst+1] = '(' + dst[nDst+2] = 'B' + nDst += 3 + } else if nDst >= len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst] = uint8(r) + nDst++ + continue + + writeJIS: + if *e != jis0208State { + if nDst+5 > len(dst) { + err = transform.ErrShortDst + break + } + *e = jis0208State + dst[nDst+0] = asciiEsc + dst[nDst+1] = '$' + dst[nDst+2] = 'B' + nDst += 3 + } else if nDst+2 > len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst+0] = 0x21 + uint8(r>>codeShift)&codeMask + dst[nDst+1] = 0x21 + uint8(r)&codeMask + nDst += 2 + continue + + writeKatakana: + if *e != katakanaState { + if nDst+4 > len(dst) { + err = transform.ErrShortDst + break + } + *e = katakanaState + dst[nDst+0] = asciiEsc + dst[nDst+1] = '(' + dst[nDst+2] = 'I' + nDst += 3 + } else if nDst >= len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst] = uint8(r - (0xff61 - 0x21)) + nDst++ + continue + } + if atEOF && err == nil && *e != asciiState { + if nDst+3 > len(dst) { + err = transform.ErrShortDst + } else { + *e = asciiState + dst[nDst+0] = asciiEsc + dst[nDst+1] = '(' + dst[nDst+2] = 'B' + nDst += 3 + } + } + return nDst, nSrc, err +} diff --git a/backend/vendor/golang.org/x/text/encoding/japanese/shiftjis.go b/backend/vendor/golang.org/x/text/encoding/japanese/shiftjis.go new file mode 100644 index 0000000..16fd8a6 --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/japanese/shiftjis.go @@ -0,0 +1,189 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package japanese + +import ( + "unicode/utf8" + + "golang.org/x/text/encoding" + "golang.org/x/text/encoding/internal" + "golang.org/x/text/encoding/internal/identifier" + "golang.org/x/text/transform" +) + +// ShiftJIS is the Shift JIS encoding, also known as Code Page 932 and +// Windows-31J. +var ShiftJIS encoding.Encoding = &shiftJIS + +var shiftJIS = internal.Encoding{ + &internal.SimpleEncoding{shiftJISDecoder{}, shiftJISEncoder{}}, + "Shift JIS", + identifier.ShiftJIS, +} + +type shiftJISDecoder struct{ transform.NopResetter } + +func (shiftJISDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 +loop: + for ; nSrc < len(src); nSrc += size { + switch c0 := src[nSrc]; { + case c0 < utf8.RuneSelf: + r, size = rune(c0), 1 + + case 0xa1 <= c0 && c0 < 0xe0: + r, size = rune(c0)+(0xff61-0xa1), 1 + + case (0x81 <= c0 && c0 < 0xa0) || (0xe0 <= c0 && c0 < 0xfd): + if c0 <= 0x9f { + c0 -= 0x70 + } else { + c0 -= 0xb0 + } + c0 = 2*c0 - 0x21 + + if nSrc+1 >= len(src) { + if !atEOF { + err = transform.ErrShortSrc + break loop + } + r, size = '\ufffd', 1 + goto write + } + c1 := src[nSrc+1] + switch { + case c1 < 0x40: + r, size = '\ufffd', 1 // c1 is ASCII so output on next round + goto write + case c1 < 0x7f: + c0-- + c1 -= 0x40 + case c1 == 0x7f: + r, size = '\ufffd', 1 // c1 is ASCII so output on next round + goto write + case c1 < 0x9f: + c0-- + c1 -= 0x41 + case c1 < 0xfd: + c1 -= 0x9f + default: + r, size = '\ufffd', 2 + goto write + } + r, size = '\ufffd', 2 + if i := int(c0)*94 + int(c1); i < len(jis0208Decode) { + r = rune(jis0208Decode[i]) + if r == 0 { + r = '\ufffd' + } + } + + case c0 == 0x80: + r, size = 0x80, 1 + + default: + r, size = '\ufffd', 1 + } + write: + if nDst+utf8.RuneLen(r) > len(dst) { + err = transform.ErrShortDst + break loop + } + nDst += utf8.EncodeRune(dst[nDst:], r) + } + return nDst, nSrc, err +} + +type shiftJISEncoder struct{ transform.NopResetter } + +func (shiftJISEncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 +loop: + for ; nSrc < len(src); nSrc += size { + r = rune(src[nSrc]) + + // Decode a 1-byte rune. + if r < utf8.RuneSelf { + size = 1 + + } else { + // Decode a multi-byte rune. + r, size = utf8.DecodeRune(src[nSrc:]) + if size == 1 { + // All valid runes of size 1 (those below utf8.RuneSelf) were + // handled above. We have invalid UTF-8 or we haven't seen the + // full character yet. + if !atEOF && !utf8.FullRune(src[nSrc:]) { + err = transform.ErrShortSrc + break loop + } + } + + // func init checks that the switch covers all tables. + switch { + case encode0Low <= r && r < encode0High: + if r = rune(encode0[r-encode0Low]); r>>tableShift == jis0208 { + goto write2 + } + case encode1Low <= r && r < encode1High: + if r = rune(encode1[r-encode1Low]); r>>tableShift == jis0208 { + goto write2 + } + case encode2Low <= r && r < encode2High: + if r = rune(encode2[r-encode2Low]); r>>tableShift == jis0208 { + goto write2 + } + case encode3Low <= r && r < encode3High: + if r = rune(encode3[r-encode3Low]); r>>tableShift == jis0208 { + goto write2 + } + case encode4Low <= r && r < encode4High: + if r = rune(encode4[r-encode4Low]); r>>tableShift == jis0208 { + goto write2 + } + case encode5Low <= r && r < encode5High: + if 0xff61 <= r && r < 0xffa0 { + r -= 0xff61 - 0xa1 + goto write1 + } + if r = rune(encode5[r-encode5Low]); r>>tableShift == jis0208 { + goto write2 + } + } + err = internal.ErrASCIIReplacement + break + } + + write1: + if nDst >= len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst] = uint8(r) + nDst++ + continue + + write2: + j1 := uint8(r>>codeShift) & codeMask + j2 := uint8(r) & codeMask + if nDst+2 > len(dst) { + err = transform.ErrShortDst + break loop + } + if j1 <= 61 { + dst[nDst+0] = 129 + j1/2 + } else { + dst[nDst+0] = 193 + j1/2 + } + if j1&1 == 0 { + dst[nDst+1] = j2 + j2/63 + 64 + } else { + dst[nDst+1] = j2 + 159 + } + nDst += 2 + continue + } + return nDst, nSrc, err +} diff --git a/backend/vendor/golang.org/x/text/encoding/japanese/tables.go b/backend/vendor/golang.org/x/text/encoding/japanese/tables.go new file mode 100644 index 0000000..8717b79 --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/japanese/tables.go @@ -0,0 +1,26971 @@ +// generated by go run maketables.go; DO NOT EDIT + +// Package japanese provides Japanese encodings such as EUC-JP and Shift JIS. +package japanese // import "golang.org/x/text/encoding/japanese" + +// jis0208Decode is the decoding table from JIS 0208 code to Unicode. +// It is defined at http://encoding.spec.whatwg.org/index-jis0208.txt +var jis0208Decode = [...]uint16{ + 0: 0x3000, + 1: 0x3001, + 2: 0x3002, + 3: 0xFF0C, + 4: 0xFF0E, + 5: 0x30FB, + 6: 0xFF1A, + 7: 0xFF1B, + 8: 0xFF1F, + 9: 0xFF01, + 10: 0x309B, + 11: 0x309C, + 12: 0x00B4, + 13: 0xFF40, + 14: 0x00A8, + 15: 0xFF3E, + 16: 0xFFE3, + 17: 0xFF3F, + 18: 0x30FD, + 19: 0x30FE, + 20: 0x309D, + 21: 0x309E, + 22: 0x3003, + 23: 0x4EDD, + 24: 0x3005, + 25: 0x3006, + 26: 0x3007, + 27: 0x30FC, + 28: 0x2015, + 29: 0x2010, + 30: 0xFF0F, + 31: 0xFF3C, + 32: 0xFF5E, + 33: 0x2225, + 34: 0xFF5C, + 35: 0x2026, + 36: 0x2025, + 37: 0x2018, + 38: 0x2019, + 39: 0x201C, + 40: 0x201D, + 41: 0xFF08, + 42: 0xFF09, + 43: 0x3014, + 44: 0x3015, + 45: 0xFF3B, + 46: 0xFF3D, + 47: 0xFF5B, + 48: 0xFF5D, + 49: 0x3008, + 50: 0x3009, + 51: 0x300A, + 52: 0x300B, + 53: 0x300C, + 54: 0x300D, + 55: 0x300E, + 56: 0x300F, + 57: 0x3010, + 58: 0x3011, + 59: 0xFF0B, + 60: 0xFF0D, + 61: 0x00B1, + 62: 0x00D7, + 63: 0x00F7, + 64: 0xFF1D, + 65: 0x2260, + 66: 0xFF1C, + 67: 0xFF1E, + 68: 0x2266, + 69: 0x2267, + 70: 0x221E, + 71: 0x2234, + 72: 0x2642, + 73: 0x2640, + 74: 0x00B0, + 75: 0x2032, + 76: 0x2033, + 77: 0x2103, + 78: 0xFFE5, + 79: 0xFF04, + 80: 0xFFE0, + 81: 0xFFE1, + 82: 0xFF05, + 83: 0xFF03, + 84: 0xFF06, + 85: 0xFF0A, + 86: 0xFF20, + 87: 0x00A7, + 88: 0x2606, + 89: 0x2605, + 90: 0x25CB, + 91: 0x25CF, + 92: 0x25CE, + 93: 0x25C7, + 94: 0x25C6, + 95: 0x25A1, + 96: 0x25A0, + 97: 0x25B3, + 98: 0x25B2, + 99: 0x25BD, + 100: 0x25BC, + 101: 0x203B, + 102: 0x3012, + 103: 0x2192, + 104: 0x2190, + 105: 0x2191, + 106: 0x2193, + 107: 0x3013, + 119: 0x2208, + 120: 0x220B, + 121: 0x2286, + 122: 0x2287, + 123: 0x2282, + 124: 0x2283, + 125: 0x222A, + 126: 0x2229, + 135: 0x2227, + 136: 0x2228, + 137: 0xFFE2, + 138: 0x21D2, + 139: 0x21D4, + 140: 0x2200, + 141: 0x2203, + 153: 0x2220, + 154: 0x22A5, + 155: 0x2312, + 156: 0x2202, + 157: 0x2207, + 158: 0x2261, + 159: 0x2252, + 160: 0x226A, + 161: 0x226B, + 162: 0x221A, + 163: 0x223D, + 164: 0x221D, + 165: 0x2235, + 166: 0x222B, + 167: 0x222C, + 175: 0x212B, + 176: 0x2030, + 177: 0x266F, + 178: 0x266D, + 179: 0x266A, + 180: 0x2020, + 181: 0x2021, + 182: 0x00B6, + 187: 0x25EF, + 203: 0xFF10, + 204: 0xFF11, + 205: 0xFF12, + 206: 0xFF13, + 207: 0xFF14, + 208: 0xFF15, + 209: 0xFF16, + 210: 0xFF17, + 211: 0xFF18, + 212: 0xFF19, + 220: 0xFF21, + 221: 0xFF22, + 222: 0xFF23, + 223: 0xFF24, + 224: 0xFF25, + 225: 0xFF26, + 226: 0xFF27, + 227: 0xFF28, + 228: 0xFF29, + 229: 0xFF2A, + 230: 0xFF2B, + 231: 0xFF2C, + 232: 0xFF2D, + 233: 0xFF2E, + 234: 0xFF2F, + 235: 0xFF30, + 236: 0xFF31, + 237: 0xFF32, + 238: 0xFF33, + 239: 0xFF34, + 240: 0xFF35, + 241: 0xFF36, + 242: 0xFF37, + 243: 0xFF38, + 244: 0xFF39, + 245: 0xFF3A, + 252: 0xFF41, + 253: 0xFF42, + 254: 0xFF43, + 255: 0xFF44, + 256: 0xFF45, + 257: 0xFF46, + 258: 0xFF47, + 259: 0xFF48, + 260: 0xFF49, + 261: 0xFF4A, + 262: 0xFF4B, + 263: 0xFF4C, + 264: 0xFF4D, + 265: 0xFF4E, + 266: 0xFF4F, + 267: 0xFF50, + 268: 0xFF51, + 269: 0xFF52, + 270: 0xFF53, + 271: 0xFF54, + 272: 0xFF55, + 273: 0xFF56, + 274: 0xFF57, + 275: 0xFF58, + 276: 0xFF59, + 277: 0xFF5A, + 282: 0x3041, + 283: 0x3042, + 284: 0x3043, + 285: 0x3044, + 286: 0x3045, + 287: 0x3046, + 288: 0x3047, + 289: 0x3048, + 290: 0x3049, + 291: 0x304A, + 292: 0x304B, + 293: 0x304C, + 294: 0x304D, + 295: 0x304E, + 296: 0x304F, + 297: 0x3050, + 298: 0x3051, + 299: 0x3052, + 300: 0x3053, + 301: 0x3054, + 302: 0x3055, + 303: 0x3056, + 304: 0x3057, + 305: 0x3058, + 306: 0x3059, + 307: 0x305A, + 308: 0x305B, + 309: 0x305C, + 310: 0x305D, + 311: 0x305E, + 312: 0x305F, + 313: 0x3060, + 314: 0x3061, + 315: 0x3062, + 316: 0x3063, + 317: 0x3064, + 318: 0x3065, + 319: 0x3066, + 320: 0x3067, + 321: 0x3068, + 322: 0x3069, + 323: 0x306A, + 324: 0x306B, + 325: 0x306C, + 326: 0x306D, + 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+ 8580: 0x92E0, + 8581: 0x92D3, + 8582: 0x9325, + 8583: 0x9321, + 8584: 0x92FB, + 8585: 0xFA28, + 8586: 0x931E, + 8587: 0x92FF, + 8588: 0x931D, + 8589: 0x9302, + 8590: 0x9370, + 8591: 0x9357, + 8592: 0x93A4, + 8593: 0x93C6, + 8594: 0x93DE, + 8595: 0x93F8, + 8596: 0x9431, + 8597: 0x9445, + 8598: 0x9448, + 8599: 0x9592, + 8600: 0xF9DC, + 8601: 0xFA29, + 8602: 0x969D, + 8603: 0x96AF, + 8604: 0x9733, + 8605: 0x973B, + 8606: 0x9743, + 8607: 0x974D, + 8608: 0x974F, + 8609: 0x9751, + 8610: 0x9755, + 8611: 0x9857, + 8612: 0x9865, + 8613: 0xFA2A, + 8614: 0xFA2B, + 8615: 0x9927, + 8616: 0xFA2C, + 8617: 0x999E, + 8618: 0x9A4E, + 8619: 0x9AD9, + 8620: 0x9ADC, + 8621: 0x9B75, + 8622: 0x9B72, + 8623: 0x9B8F, + 8624: 0x9BB1, + 8625: 0x9BBB, + 8626: 0x9C00, + 8627: 0x9D70, + 8628: 0x9D6B, + 8629: 0xFA2D, + 8630: 0x9E19, + 8631: 0x9ED1, + 8634: 0x2170, + 8635: 0x2171, + 8636: 0x2172, + 8637: 0x2173, + 8638: 0x2174, + 8639: 0x2175, + 8640: 0x2176, + 8641: 0x2177, + 8642: 0x2178, + 8643: 0x2179, + 8644: 0xFFE2, + 8645: 0xFFE4, + 8646: 0xFF07, + 8647: 0xFF02, + 10716: 0x2170, + 10717: 0x2171, + 10718: 0x2172, + 10719: 0x2173, + 10720: 0x2174, + 10721: 0x2175, + 10722: 0x2176, + 10723: 0x2177, + 10724: 0x2178, + 10725: 0x2179, + 10726: 0x2160, + 10727: 0x2161, + 10728: 0x2162, + 10729: 0x2163, + 10730: 0x2164, + 10731: 0x2165, + 10732: 0x2166, + 10733: 0x2167, + 10734: 0x2168, + 10735: 0x2169, + 10736: 0xFFE2, + 10737: 0xFFE4, + 10738: 0xFF07, + 10739: 0xFF02, + 10740: 0x3231, + 10741: 0x2116, + 10742: 0x2121, + 10743: 0x2235, + 10744: 0x7E8A, + 10745: 0x891C, + 10746: 0x9348, + 10747: 0x9288, + 10748: 0x84DC, + 10749: 0x4FC9, + 10750: 0x70BB, + 10751: 0x6631, + 10752: 0x68C8, + 10753: 0x92F9, + 10754: 0x66FB, + 10755: 0x5F45, + 10756: 0x4E28, + 10757: 0x4EE1, + 10758: 0x4EFC, + 10759: 0x4F00, + 10760: 0x4F03, + 10761: 0x4F39, + 10762: 0x4F56, + 10763: 0x4F92, + 10764: 0x4F8A, + 10765: 0x4F9A, + 10766: 0x4F94, + 10767: 0x4FCD, + 10768: 0x5040, + 10769: 0x5022, + 10770: 0x4FFF, + 10771: 0x501E, + 10772: 0x5046, + 10773: 0x5070, + 10774: 0x5042, + 10775: 0x5094, + 10776: 0x50F4, + 10777: 0x50D8, + 10778: 0x514A, + 10779: 0x5164, + 10780: 0x519D, + 10781: 0x51BE, + 10782: 0x51EC, + 10783: 0x5215, + 10784: 0x529C, + 10785: 0x52A6, + 10786: 0x52C0, + 10787: 0x52DB, + 10788: 0x5300, + 10789: 0x5307, + 10790: 0x5324, + 10791: 0x5372, + 10792: 0x5393, + 10793: 0x53B2, + 10794: 0x53DD, + 10795: 0xFA0E, + 10796: 0x549C, + 10797: 0x548A, + 10798: 0x54A9, + 10799: 0x54FF, + 10800: 0x5586, + 10801: 0x5759, + 10802: 0x5765, + 10803: 0x57AC, + 10804: 0x57C8, + 10805: 0x57C7, + 10806: 0xFA0F, + 10807: 0xFA10, + 10808: 0x589E, + 10809: 0x58B2, + 10810: 0x590B, + 10811: 0x5953, + 10812: 0x595B, + 10813: 0x595D, + 10814: 0x5963, + 10815: 0x59A4, + 10816: 0x59BA, + 10817: 0x5B56, + 10818: 0x5BC0, + 10819: 0x752F, + 10820: 0x5BD8, + 10821: 0x5BEC, + 10822: 0x5C1E, + 10823: 0x5CA6, + 10824: 0x5CBA, + 10825: 0x5CF5, + 10826: 0x5D27, + 10827: 0x5D53, + 10828: 0xFA11, + 10829: 0x5D42, + 10830: 0x5D6D, + 10831: 0x5DB8, + 10832: 0x5DB9, + 10833: 0x5DD0, + 10834: 0x5F21, + 10835: 0x5F34, + 10836: 0x5F67, + 10837: 0x5FB7, + 10838: 0x5FDE, + 10839: 0x605D, + 10840: 0x6085, + 10841: 0x608A, + 10842: 0x60DE, + 10843: 0x60D5, + 10844: 0x6120, + 10845: 0x60F2, + 10846: 0x6111, + 10847: 0x6137, + 10848: 0x6130, + 10849: 0x6198, + 10850: 0x6213, + 10851: 0x62A6, + 10852: 0x63F5, + 10853: 0x6460, + 10854: 0x649D, + 10855: 0x64CE, + 10856: 0x654E, + 10857: 0x6600, + 10858: 0x6615, + 10859: 0x663B, + 10860: 0x6609, + 10861: 0x662E, + 10862: 0x661E, + 10863: 0x6624, + 10864: 0x6665, + 10865: 0x6657, + 10866: 0x6659, + 10867: 0xFA12, + 10868: 0x6673, + 10869: 0x6699, + 10870: 0x66A0, + 10871: 0x66B2, + 10872: 0x66BF, + 10873: 0x66FA, + 10874: 0x670E, + 10875: 0xF929, + 10876: 0x6766, + 10877: 0x67BB, + 10878: 0x6852, + 10879: 0x67C0, + 10880: 0x6801, + 10881: 0x6844, + 10882: 0x68CF, + 10883: 0xFA13, + 10884: 0x6968, + 10885: 0xFA14, + 10886: 0x6998, + 10887: 0x69E2, + 10888: 0x6A30, + 10889: 0x6A6B, + 10890: 0x6A46, + 10891: 0x6A73, + 10892: 0x6A7E, + 10893: 0x6AE2, + 10894: 0x6AE4, + 10895: 0x6BD6, + 10896: 0x6C3F, + 10897: 0x6C5C, + 10898: 0x6C86, + 10899: 0x6C6F, + 10900: 0x6CDA, + 10901: 0x6D04, + 10902: 0x6D87, + 10903: 0x6D6F, + 10904: 0x6D96, + 10905: 0x6DAC, + 10906: 0x6DCF, + 10907: 0x6DF8, + 10908: 0x6DF2, + 10909: 0x6DFC, + 10910: 0x6E39, + 10911: 0x6E5C, + 10912: 0x6E27, + 10913: 0x6E3C, + 10914: 0x6EBF, + 10915: 0x6F88, + 10916: 0x6FB5, + 10917: 0x6FF5, + 10918: 0x7005, + 10919: 0x7007, + 10920: 0x7028, + 10921: 0x7085, + 10922: 0x70AB, + 10923: 0x710F, + 10924: 0x7104, + 10925: 0x715C, + 10926: 0x7146, + 10927: 0x7147, + 10928: 0xFA15, + 10929: 0x71C1, + 10930: 0x71FE, + 10931: 0x72B1, + 10932: 0x72BE, + 10933: 0x7324, + 10934: 0xFA16, + 10935: 0x7377, + 10936: 0x73BD, + 10937: 0x73C9, + 10938: 0x73D6, + 10939: 0x73E3, + 10940: 0x73D2, + 10941: 0x7407, + 10942: 0x73F5, + 10943: 0x7426, + 10944: 0x742A, + 10945: 0x7429, + 10946: 0x742E, + 10947: 0x7462, + 10948: 0x7489, + 10949: 0x749F, + 10950: 0x7501, + 10951: 0x756F, + 10952: 0x7682, + 10953: 0x769C, + 10954: 0x769E, + 10955: 0x769B, + 10956: 0x76A6, + 10957: 0xFA17, + 10958: 0x7746, + 10959: 0x52AF, + 10960: 0x7821, + 10961: 0x784E, + 10962: 0x7864, + 10963: 0x787A, + 10964: 0x7930, + 10965: 0xFA18, + 10966: 0xFA19, + 10967: 0xFA1A, + 10968: 0x7994, + 10969: 0xFA1B, + 10970: 0x799B, + 10971: 0x7AD1, + 10972: 0x7AE7, + 10973: 0xFA1C, + 10974: 0x7AEB, + 10975: 0x7B9E, + 10976: 0xFA1D, + 10977: 0x7D48, + 10978: 0x7D5C, + 10979: 0x7DB7, + 10980: 0x7DA0, + 10981: 0x7DD6, + 10982: 0x7E52, + 10983: 0x7F47, + 10984: 0x7FA1, + 10985: 0xFA1E, + 10986: 0x8301, + 10987: 0x8362, + 10988: 0x837F, + 10989: 0x83C7, + 10990: 0x83F6, + 10991: 0x8448, + 10992: 0x84B4, + 10993: 0x8553, + 10994: 0x8559, + 10995: 0x856B, + 10996: 0xFA1F, + 10997: 0x85B0, + 10998: 0xFA20, + 10999: 0xFA21, + 11000: 0x8807, + 11001: 0x88F5, + 11002: 0x8A12, + 11003: 0x8A37, + 11004: 0x8A79, + 11005: 0x8AA7, + 11006: 0x8ABE, + 11007: 0x8ADF, + 11008: 0xFA22, + 11009: 0x8AF6, + 11010: 0x8B53, + 11011: 0x8B7F, + 11012: 0x8CF0, + 11013: 0x8CF4, + 11014: 0x8D12, + 11015: 0x8D76, + 11016: 0xFA23, + 11017: 0x8ECF, + 11018: 0xFA24, + 11019: 0xFA25, + 11020: 0x9067, + 11021: 0x90DE, + 11022: 0xFA26, + 11023: 0x9115, + 11024: 0x9127, + 11025: 0x91DA, + 11026: 0x91D7, + 11027: 0x91DE, + 11028: 0x91ED, + 11029: 0x91EE, + 11030: 0x91E4, + 11031: 0x91E5, + 11032: 0x9206, + 11033: 0x9210, + 11034: 0x920A, + 11035: 0x923A, + 11036: 0x9240, + 11037: 0x923C, + 11038: 0x924E, + 11039: 0x9259, + 11040: 0x9251, + 11041: 0x9239, + 11042: 0x9267, + 11043: 0x92A7, + 11044: 0x9277, + 11045: 0x9278, + 11046: 0x92E7, + 11047: 0x92D7, + 11048: 0x92D9, + 11049: 0x92D0, + 11050: 0xFA27, + 11051: 0x92D5, + 11052: 0x92E0, + 11053: 0x92D3, + 11054: 0x9325, + 11055: 0x9321, + 11056: 0x92FB, + 11057: 0xFA28, + 11058: 0x931E, + 11059: 0x92FF, + 11060: 0x931D, + 11061: 0x9302, + 11062: 0x9370, + 11063: 0x9357, + 11064: 0x93A4, + 11065: 0x93C6, + 11066: 0x93DE, + 11067: 0x93F8, + 11068: 0x9431, + 11069: 0x9445, + 11070: 0x9448, + 11071: 0x9592, + 11072: 0xF9DC, + 11073: 0xFA29, + 11074: 0x969D, + 11075: 0x96AF, + 11076: 0x9733, + 11077: 0x973B, + 11078: 0x9743, + 11079: 0x974D, + 11080: 0x974F, + 11081: 0x9751, + 11082: 0x9755, + 11083: 0x9857, + 11084: 0x9865, + 11085: 0xFA2A, + 11086: 0xFA2B, + 11087: 0x9927, + 11088: 0xFA2C, + 11089: 0x999E, + 11090: 0x9A4E, + 11091: 0x9AD9, + 11092: 0x9ADC, + 11093: 0x9B75, + 11094: 0x9B72, + 11095: 0x9B8F, + 11096: 0x9BB1, + 11097: 0x9BBB, + 11098: 0x9C00, + 11099: 0x9D70, + 11100: 0x9D6B, + 11101: 0xFA2D, + 11102: 0x9E19, + 11103: 0x9ED1, +} + +// jis0212Decode is the decoding table from JIS 0212 code to Unicode. +// It is defined at http://encoding.spec.whatwg.org/index-jis0212.txt +var jis0212Decode = [...]uint16{ + 108: 0x02D8, + 109: 0x02C7, + 110: 0x00B8, + 111: 0x02D9, + 112: 0x02DD, + 113: 0x00AF, + 114: 0x02DB, + 115: 0x02DA, + 116: 0xFF5E, + 117: 0x0384, + 118: 0x0385, + 127: 0x00A1, + 128: 0x00A6, + 129: 0x00BF, + 168: 0x00BA, + 169: 0x00AA, + 170: 0x00A9, + 171: 0x00AE, + 172: 0x2122, + 173: 0x00A4, + 174: 0x2116, + 534: 0x0386, + 535: 0x0388, + 536: 0x0389, + 537: 0x038A, + 538: 0x03AA, + 540: 0x038C, + 542: 0x038E, + 543: 0x03AB, + 545: 0x038F, + 550: 0x03AC, + 551: 0x03AD, + 552: 0x03AE, + 553: 0x03AF, + 554: 0x03CA, + 555: 0x0390, + 556: 0x03CC, + 557: 0x03C2, + 558: 0x03CD, + 559: 0x03CB, + 560: 0x03B0, + 561: 0x03CE, + 597: 0x0402, + 598: 0x0403, + 599: 0x0404, + 600: 0x0405, + 601: 0x0406, + 602: 0x0407, + 603: 0x0408, + 604: 0x0409, + 605: 0x040A, + 606: 0x040B, + 607: 0x040C, + 608: 0x040E, + 609: 0x040F, + 645: 0x0452, + 646: 0x0453, + 647: 0x0454, + 648: 0x0455, + 649: 0x0456, + 650: 0x0457, + 651: 0x0458, + 652: 0x0459, + 653: 0x045A, + 654: 0x045B, + 655: 0x045C, + 656: 0x045E, + 657: 0x045F, + 752: 0x00C6, + 753: 0x0110, + 755: 0x0126, + 757: 0x0132, + 759: 0x0141, + 760: 0x013F, + 762: 0x014A, + 763: 0x00D8, + 764: 0x0152, + 766: 0x0166, + 767: 0x00DE, + 784: 0x00E6, + 785: 0x0111, + 786: 0x00F0, + 787: 0x0127, + 788: 0x0131, + 789: 0x0133, + 790: 0x0138, + 791: 0x0142, + 792: 0x0140, + 793: 0x0149, + 794: 0x014B, + 795: 0x00F8, + 796: 0x0153, + 797: 0x00DF, + 798: 0x0167, + 799: 0x00FE, + 846: 0x00C1, + 847: 0x00C0, + 848: 0x00C4, + 849: 0x00C2, + 850: 0x0102, + 851: 0x01CD, + 852: 0x0100, + 853: 0x0104, + 854: 0x00C5, + 855: 0x00C3, + 856: 0x0106, + 857: 0x0108, + 858: 0x010C, + 859: 0x00C7, + 860: 0x010A, + 861: 0x010E, + 862: 0x00C9, + 863: 0x00C8, + 864: 0x00CB, + 865: 0x00CA, + 866: 0x011A, + 867: 0x0116, + 868: 0x0112, + 869: 0x0118, + 871: 0x011C, + 872: 0x011E, + 873: 0x0122, + 874: 0x0120, + 875: 0x0124, + 876: 0x00CD, + 877: 0x00CC, + 878: 0x00CF, + 879: 0x00CE, + 880: 0x01CF, + 881: 0x0130, + 882: 0x012A, + 883: 0x012E, + 884: 0x0128, + 885: 0x0134, + 886: 0x0136, + 887: 0x0139, + 888: 0x013D, + 889: 0x013B, + 890: 0x0143, + 891: 0x0147, + 892: 0x0145, + 893: 0x00D1, + 894: 0x00D3, + 895: 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+ 6981: 0x9C37, + 6982: 0x9C3D, + 6983: 0x9C41, + 6984: 0x9C43, + 6985: 0x9C44, + 6986: 0x9C45, + 6987: 0x9C49, + 6988: 0x9C4A, + 6989: 0x9C4E, + 6990: 0x9C4F, + 6991: 0x9C50, + 6992: 0x9C53, + 6993: 0x9C54, + 6994: 0x9C56, + 6995: 0x9C58, + 6996: 0x9C5B, + 6997: 0x9C5D, + 6998: 0x9C5E, + 6999: 0x9C5F, + 7000: 0x9C63, + 7001: 0x9C69, + 7002: 0x9C6A, + 7003: 0x9C5C, + 7004: 0x9C6B, + 7005: 0x9C68, + 7006: 0x9C6E, + 7007: 0x9C70, + 7008: 0x9C72, + 7009: 0x9C75, + 7010: 0x9C77, + 7011: 0x9C7B, + 7012: 0x9CE6, + 7013: 0x9CF2, + 7014: 0x9CF7, + 7015: 0x9CF9, + 7016: 0x9D0B, + 7017: 0x9D02, + 7018: 0x9D11, + 7019: 0x9D17, + 7020: 0x9D18, + 7021: 0x9D1C, + 7022: 0x9D1D, + 7023: 0x9D1E, + 7024: 0x9D2F, + 7025: 0x9D30, + 7026: 0x9D32, + 7027: 0x9D33, + 7028: 0x9D34, + 7029: 0x9D3A, + 7030: 0x9D3C, + 7031: 0x9D45, + 7032: 0x9D3D, + 7033: 0x9D42, + 7034: 0x9D43, + 7035: 0x9D47, + 7036: 0x9D4A, + 7037: 0x9D53, + 7038: 0x9D54, + 7039: 0x9D5F, + 7040: 0x9D63, + 7041: 0x9D62, + 7042: 0x9D65, + 7043: 0x9D69, + 7044: 0x9D6A, + 7045: 0x9D6B, + 7046: 0x9D70, + 7047: 0x9D76, + 7048: 0x9D77, + 7049: 0x9D7B, + 7050: 0x9D7C, + 7051: 0x9D7E, + 7052: 0x9D83, + 7053: 0x9D84, + 7054: 0x9D86, + 7055: 0x9D8A, + 7056: 0x9D8D, + 7057: 0x9D8E, + 7058: 0x9D92, + 7059: 0x9D93, + 7060: 0x9D95, + 7061: 0x9D96, + 7062: 0x9D97, + 7063: 0x9D98, + 7064: 0x9DA1, + 7065: 0x9DAA, + 7066: 0x9DAC, + 7067: 0x9DAE, + 7068: 0x9DB1, + 7069: 0x9DB5, + 7070: 0x9DB9, + 7071: 0x9DBC, + 7072: 0x9DBF, + 7073: 0x9DC3, + 7074: 0x9DC7, + 7075: 0x9DC9, + 7076: 0x9DCA, + 7077: 0x9DD4, + 7078: 0x9DD5, + 7079: 0x9DD6, + 7080: 0x9DD7, + 7081: 0x9DDA, + 7082: 0x9DDE, + 7083: 0x9DDF, + 7084: 0x9DE0, + 7085: 0x9DE5, + 7086: 0x9DE7, + 7087: 0x9DE9, + 7088: 0x9DEB, + 7089: 0x9DEE, + 7090: 0x9DF0, + 7091: 0x9DF3, + 7092: 0x9DF4, + 7093: 0x9DFE, + 7094: 0x9E0A, + 7095: 0x9E02, + 7096: 0x9E07, + 7097: 0x9E0E, + 7098: 0x9E10, + 7099: 0x9E11, + 7100: 0x9E12, + 7101: 0x9E15, + 7102: 0x9E16, + 7103: 0x9E19, + 7104: 0x9E1C, + 7105: 0x9E1D, + 7106: 0x9E7A, + 7107: 0x9E7B, + 7108: 0x9E7C, + 7109: 0x9E80, + 7110: 0x9E82, + 7111: 0x9E83, + 7112: 0x9E84, + 7113: 0x9E85, + 7114: 0x9E87, + 7115: 0x9E8E, + 7116: 0x9E8F, + 7117: 0x9E96, + 7118: 0x9E98, + 7119: 0x9E9B, + 7120: 0x9E9E, + 7121: 0x9EA4, + 7122: 0x9EA8, + 7123: 0x9EAC, + 7124: 0x9EAE, + 7125: 0x9EAF, + 7126: 0x9EB0, + 7127: 0x9EB3, + 7128: 0x9EB4, + 7129: 0x9EB5, + 7130: 0x9EC6, + 7131: 0x9EC8, + 7132: 0x9ECB, + 7133: 0x9ED5, + 7134: 0x9EDF, + 7135: 0x9EE4, + 7136: 0x9EE7, + 7137: 0x9EEC, + 7138: 0x9EED, + 7139: 0x9EEE, + 7140: 0x9EF0, + 7141: 0x9EF1, + 7142: 0x9EF2, + 7143: 0x9EF5, + 7144: 0x9EF8, + 7145: 0x9EFF, + 7146: 0x9F02, + 7147: 0x9F03, + 7148: 0x9F09, + 7149: 0x9F0F, + 7150: 0x9F10, + 7151: 0x9F11, + 7152: 0x9F12, + 7153: 0x9F14, + 7154: 0x9F16, + 7155: 0x9F17, + 7156: 0x9F19, + 7157: 0x9F1A, + 7158: 0x9F1B, + 7159: 0x9F1F, + 7160: 0x9F22, + 7161: 0x9F26, + 7162: 0x9F2A, + 7163: 0x9F2B, + 7164: 0x9F2F, + 7165: 0x9F31, + 7166: 0x9F32, + 7167: 0x9F34, + 7168: 0x9F37, + 7169: 0x9F39, + 7170: 0x9F3A, + 7171: 0x9F3C, + 7172: 0x9F3D, + 7173: 0x9F3F, + 7174: 0x9F41, + 7175: 0x9F43, + 7176: 0x9F44, + 7177: 0x9F45, + 7178: 0x9F46, + 7179: 0x9F47, + 7180: 0x9F53, + 7181: 0x9F55, + 7182: 0x9F56, + 7183: 0x9F57, + 7184: 0x9F58, + 7185: 0x9F5A, + 7186: 0x9F5D, + 7187: 0x9F5E, + 7188: 0x9F68, + 7189: 0x9F69, + 7190: 0x9F6D, + 7191: 0x9F6E, + 7192: 0x9F6F, + 7193: 0x9F70, + 7194: 0x9F71, + 7195: 0x9F73, + 7196: 0x9F75, + 7197: 0x9F7A, + 7198: 0x9F7D, + 7199: 0x9F8F, + 7200: 0x9F90, + 7201: 0x9F91, + 7202: 0x9F92, + 7203: 0x9F94, + 7204: 0x9F96, + 7205: 0x9F97, + 7206: 0x9F9E, + 7207: 0x9FA1, + 7208: 0x9FA2, + 7209: 0x9FA3, + 7210: 0x9FA5, +} + +const ( + jis0208 = 1 + jis0212 = 2 + codeMask = 0x7f + codeShift = 7 + tableShift = 14 +) + +const numEncodeTables = 6 + +// encodeX are the encoding tables from Unicode to JIS code, +// sorted by decreasing length. +// encode0: 20902 entries for runes in [19968, 40870). +// encode1: 1632 entries for runes in [ 8208, 9840). +// encode2: 974 entries for runes in [12288, 13262). +// encode3: 959 entries for runes in [ 161, 1120). +// encode4: 261 entries for runes in [63785, 64046). +// encode5: 229 entries for runes in [65281, 65510). +// +// The high two bits of the value record whether the JIS code comes from the +// JIS0208 table (high bits == 1) or the JIS0212 table (high bits == 2). +// The low 14 bits are two 7-bit unsigned integers j1 and j2 that form the +// JIS code (94*j1 + j2) within that table. + +const encode0Low, encode0High = 19968, 40870 + +var encode0 = [...]uint16{ + 19968 - 19968: jis0208<<14 | 0x0F<<7 | 0x4B, + 19969 - 19968: jis0208<<14 | 0x22<<7 | 0x59, + 19970 - 19968: jis0212<<14 | 0x0F<<7 | 0x00, + 19971 - 19968: jis0208<<14 | 0x1B<<7 | 0x16, + 19972 - 19968: jis0212<<14 | 0x0F<<7 | 0x01, + 19973 - 19968: jis0212<<14 | 0x0F<<7 | 0x02, + 19975 - 19968: jis0208<<14 | 0x2A<<7 | 0x5B, + 19976 - 19968: jis0208<<14 | 0x1D<<7 | 0x45, + 19977 - 19968: jis0208<<14 | 0x1A<<7 | 0x0F, + 19978 - 19968: jis0208<<14 | 0x1D<<7 | 0x44, + 19979 - 19968: jis0208<<14 | 0x11<<7 | 0x1B, + 19980 - 19968: jis0212<<14 | 0x0F<<7 | 0x03, + 19981 - 19968: jis0208<<14 | 0x28<<7 | 0x33, + 19982 - 19968: jis0208<<14 | 0x2C<<7 | 0x1E, + 19984 - 19968: jis0208<<14 | 0x2F<<7 | 0x01, + 19985 - 19968: jis0208<<14 | 0x10<<7 | 0x0E, + 19986 - 19968: jis0212<<14 | 0x0F<<7 | 0x04, + 19988 - 19968: jis0208<<14 | 0x12<<7 | 0x4D, + 19989 - 19968: jis0208<<14 | 0x2F<<7 | 0x02, + 19990 - 19968: jis0208<<14 | 0x1F<<7 | 0x03, + 19991 - 19968: jis0208<<14 | 0x31<<7 | 0x21, + 19992 - 19968: jis0208<<14 | 0x14<<7 | 0x35, + 19993 - 19968: jis0208<<14 | 0x29<<7 | 0x19, + 19998 - 19968: jis0208<<14 | 0x1D<<7 | 0x46, + 19999 - 19968: jis0212<<14 | 0x0F<<7 | 0x05, + 20001 - 19968: jis0208<<14 | 0x2D<<7 | 0x1D, + 20003 - 19968: jis0212<<14 | 0x0F<<7 | 0x06, + 20004 - 19968: jis0212<<14 | 0x0F<<7 | 0x07, + 20006 - 19968: jis0208<<14 | 0x29<<7 | 0x21, + 20008 - 19968: jis0208<<14 | 0x58<<7 | 0x0C, + 20010 - 19968: jis0208<<14 | 0x2F<<7 | 0x03, + 20011 - 19968: jis0212<<14 | 0x0F<<7 | 0x09, + 20013 - 19968: jis0208<<14 | 0x22<<7 | 0x45, + 20014 - 19968: jis0212<<14 | 0x0F<<7 | 0x0A, + 20015 - 19968: jis0212<<14 | 0x0F<<7 | 0x0B, + 20016 - 19968: jis0212<<14 | 0x0F<<7 | 0x0C, + 20017 - 19968: jis0208<<14 | 0x2F<<7 | 0x04, + 20018 - 19968: jis0208<<14 | 0x15<<7 | 0x59, + 20021 - 19968: jis0212<<14 | 0x0F<<7 | 0x0D, + 20022 - 19968: jis0208<<14 | 0x2F<<7 | 0x05, + 20024 - 19968: jis0208<<14 | 0x13<<7 | 0x3C, + 20025 - 19968: jis0208<<14 | 0x22<<7 | 0x0F, + 20027 - 19968: jis0208<<14 | 0x1B<<7 | 0x46, + 20028 - 19968: jis0208<<14 | 0x2F<<7 | 0x06, + 20031 - 19968: jis0208<<14 | 0x2F<<7 | 0x07, + 20032 - 19968: jis0212<<14 | 0x0F<<7 | 0x0E, + 20033 - 19968: jis0212<<14 | 0x0F<<7 | 0x0F, + 20034 - 19968: jis0208<<14 | 0x2F<<7 | 0x08, + 20035 - 19968: jis0208<<14 | 0x26<<7 | 0x14, + 20036 - 19968: jis0212<<14 | 0x0F<<7 | 0x10, + 20037 - 19968: jis0208<<14 | 0x14<<7 | 0x36, + 20039 - 19968: jis0212<<14 | 0x0F<<7 | 0x11, + 20043 - 19968: jis0208<<14 | 0x26<<7 | 0x16, + 20045 - 19968: jis0208<<14 | 0x25<<7 | 0x42, + 20046 - 19968: jis0208<<14 | 0x17<<7 | 0x22, + 20047 - 19968: jis0208<<14 | 0x2A<<7 | 0x12, + 20049 - 19968: jis0212<<14 | 0x0F<<7 | 0x12, + 20053 - 19968: jis0208<<14 | 0x48<<7 | 0x28, + 20054 - 19968: jis0208<<14 | 0x2F<<7 | 0x09, + 20055 - 19968: jis0208<<14 | 0x1D<<7 | 0x47, + 20056 - 19968: jis0208<<14 | 0x2F<<7 | 0x0A, + 20057 - 19968: jis0208<<14 | 0x11<<7 | 0x14, + 20058 - 19968: jis0212<<14 | 0x0F<<7 | 0x13, + 20060 - 19968: jis0212<<14 | 0x0F<<7 | 0x14, + 20061 - 19968: jis0208<<14 | 0x15<<7 | 0x44, + 20062 - 19968: jis0208<<14 | 0x17<<7 | 0x4F, + 20063 - 19968: jis0208<<14 | 0x2B<<7 | 0x48, + 20066 - 19968: jis0208<<14 | 0x35<<7 | 0x05, + 20067 - 19968: jis0212<<14 | 0x0F<<7 | 0x15, + 20072 - 19968: jis0212<<14 | 0x0F<<7 | 0x16, + 20073 - 19968: jis0212<<14 | 0x0F<<7 | 0x17, + 20081 - 19968: jis0208<<14 | 0x2C<<7 | 0x4F, + 20083 - 19968: jis0208<<14 | 0x25<<7 | 0x5C, + 20084 - 19968: jis0212<<14 | 0x0F<<7 | 0x18, + 20085 - 19968: jis0212<<14 | 0x0F<<7 | 0x19, + 20089 - 19968: jis0212<<14 | 0x0F<<7 | 0x1A, + 20094 - 19968: jis0208<<14 | 0x13<<7 | 0x04, + 20095 - 19968: jis0212<<14 | 0x0F<<7 | 0x1B, + 20096 - 19968: jis0208<<14 | 0x14<<7 | 0x14, + 20098 - 19968: jis0208<<14 | 0x2F<<7 | 0x0B, + 20101 - 19968: jis0208<<14 | 0x2F<<7 | 0x0C, + 20102 - 19968: jis0208<<14 | 0x2D<<7 | 0x1A, + 20104 - 19968: jis0208<<14 | 0x2C<<7 | 0x1C, + 20105 - 19968: jis0208<<14 | 0x20<<7 | 0x47, + 20106 - 19968: jis0208<<14 | 0x2F<<7 | 0x0E, + 20107 - 19968: jis0208<<14 | 0x1A<<7 | 0x55, + 20108 - 19968: jis0208<<14 | 0x25<<7 | 0x52, + 20109 - 19968: jis0212<<14 | 0x0F<<7 | 0x1C, + 20110 - 19968: jis0208<<14 | 0x2F<<7 | 0x11, + 20113 - 19968: jis0208<<14 | 0x10<<7 | 0x1D, + 20114 - 19968: jis0208<<14 | 0x17<<7 | 0x3E, + 20116 - 19968: jis0208<<14 | 0x17<<7 | 0x3D, + 20117 - 19968: jis0208<<14 | 0x0F<<7 | 0x45, + 20118 - 19968: jis0212<<14 | 0x0F<<7 | 0x1D, + 20119 - 19968: jis0212<<14 | 0x0F<<7 | 0x1E, + 20120 - 19968: jis0208<<14 | 0x2E<<7 | 0x2A, + 20121 - 19968: jis0208<<14 | 0x2E<<7 | 0x29, + 20123 - 19968: jis0208<<14 | 0x19<<7 | 0x12, + 20124 - 19968: jis0208<<14 | 0x0F<<7 | 0x00, + 20125 - 19968: jis0212<<14 | 0x0F<<7 | 0x1F, + 20126 - 19968: jis0208<<14 | 0x2F<<7 | 0x12, + 20127 - 19968: jis0208<<14 | 0x2F<<7 | 0x13, + 20128 - 19968: jis0208<<14 | 0x2F<<7 | 0x14, + 20129 - 19968: jis0208<<14 | 0x2A<<7 | 0x13, + 20130 - 19968: jis0208<<14 | 0x2F<<7 | 0x15, + 20132 - 19968: jis0208<<14 | 0x17<<7 | 0x51, + 20133 - 19968: jis0208<<14 | 0x0F<<7 | 0x46, + 20134 - 19968: jis0208<<14 | 0x2A<<7 | 0x51, + 20136 - 19968: jis0208<<14 | 0x14<<7 | 0x5B, + 20139 - 19968: jis0208<<14 | 0x14<<7 | 0x5C, + 20140 - 19968: jis0208<<14 | 0x14<<7 | 0x5D, + 20141 - 19968: jis0208<<14 | 0x23<<7 | 0x41, + 20142 - 19968: jis0208<<14 | 0x2D<<7 | 0x1B, + 20143 - 19968: jis0212<<14 | 0x0F<<7 | 0x20, + 20144 - 19968: jis0208<<14 | 0x2F<<7 | 0x16, + 20147 - 19968: jis0208<<14 | 0x2F<<7 | 0x17, + 20150 - 19968: jis0208<<14 | 0x2F<<7 | 0x18, + 20153 - 19968: jis0212<<14 | 0x0F<<7 | 0x21, + 20154 - 19968: jis0208<<14 | 0x1E<<7 | 0x2C, + 20160 - 19968: jis0208<<14 | 0x1C<<7 | 0x19, + 20161 - 19968: jis0208<<14 | 0x1E<<7 | 0x2D, + 20162 - 19968: jis0208<<14 | 0x2F<<7 | 0x1D, + 20163 - 19968: jis0212<<14 | 0x0F<<7 | 0x22, + 20164 - 19968: jis0208<<14 | 0x2F<<7 | 0x1B, + 20166 - 19968: jis0208<<14 | 0x2F<<7 | 0x1C, + 20167 - 19968: jis0208<<14 | 0x14<<7 | 0x37, + 20170 - 19968: jis0208<<14 | 0x19<<7 | 0x02, + 20171 - 19968: jis0208<<14 | 0x11<<7 | 0x4F, + 20173 - 19968: jis0208<<14 | 0x2F<<7 | 0x1A, + 20174 - 19968: jis0208<<14 | 0x2F<<7 | 0x19, + 20175 - 19968: jis0208<<14 | 0x29<<7 | 0x08, + 20176 - 19968: jis0212<<14 | 0x0F<<7 | 0x23, + 20180 - 19968: jis0208<<14 | 0x1A<<7 | 0x25, + 20181 - 19968: jis0208<<14 | 0x1A<<7 | 0x24, + 20182 - 19968: jis0208<<14 | 0x21<<7 | 0x1D, + 20183 - 19968: jis0208<<14 | 0x2F<<7 | 0x1E, + 20184 - 19968: jis0208<<14 | 0x28<<7 | 0x34, + 20185 - 19968: jis0208<<14 | 0x1F<<7 | 0x46, + 20186 - 19968: jis0212<<14 | 0x0F<<7 | 0x24, + 20187 - 19968: jis0212<<14 | 0x0F<<7 | 0x25, + 20189 - 19968: jis0208<<14 | 0x00<<7 | 0x17, + 20190 - 19968: jis0208<<14 | 0x2F<<7 | 0x1F, + 20191 - 19968: jis0208<<14 | 0x2F<<7 | 0x21, + 20192 - 19968: jis0212<<14 | 0x0F<<7 | 0x26, + 20193 - 19968: jis0208<<14 | 0x58<<7 | 0x0D, + 20194 - 19968: jis0212<<14 | 0x0F<<7 | 0x28, + 20195 - 19968: jis0208<<14 | 0x21<<7 | 0x44, + 20196 - 19968: jis0208<<14 | 0x2D<<7 | 0x40, + 20197 - 19968: jis0208<<14 | 0x0F<<7 | 0x29, + 20200 - 19968: jis0212<<14 | 0x0F<<7 | 0x29, + 20205 - 19968: jis0208<<14 | 0x2F<<7 | 0x20, + 20206 - 19968: jis0208<<14 | 0x11<<7 | 0x1D, + 20207 - 19968: jis0212<<14 | 0x0F<<7 | 0x2A, + 20208 - 19968: jis0208<<14 | 0x15<<7 | 0x23, + 20209 - 19968: jis0212<<14 | 0x0F<<7 | 0x2B, + 20210 - 19968: jis0208<<14 | 0x22<<7 | 0x46, + 20211 - 19968: jis0212<<14 | 0x0F<<7 | 0x2C, + 20213 - 19968: jis0212<<14 | 0x0F<<7 | 0x2D, + 20214 - 19968: jis0208<<14 | 0x16<<7 | 0x4E, + 20215 - 19968: jis0208<<14 | 0x2F<<7 | 0x22, + 20219 - 19968: jis0208<<14 | 0x26<<7 | 0x03, + 20220 - 19968: jis0208<<14 | 0x58<<7 | 0x0E, + 20221 - 19968: jis0212<<14 | 0x0F<<7 | 0x2E, + 20222 - 19968: jis0212<<14 | 0x0F<<7 | 0x2F, + 20223 - 19968: jis0212<<14 | 0x0F<<7 | 0x30, + 20224 - 19968: jis0208<<14 | 0x58<<7 | 0x0F, + 20225 - 19968: jis0208<<14 | 0x13<<7 | 0x4A, + 20226 - 19968: jis0212<<14 | 0x0F<<7 | 0x32, + 20227 - 19968: jis0208<<14 | 0x58<<7 | 0x10, + 20232 - 19968: jis0212<<14 | 0x0F<<7 | 0x34, + 20233 - 19968: jis0208<<14 | 0x2F<<7 | 0x23, + 20234 - 19968: jis0208<<14 | 0x0F<<7 | 0x2A, + 20235 - 19968: jis0212<<14 | 0x0F<<7 | 0x35, + 20236 - 19968: jis0212<<14 | 0x0F<<7 | 0x36, + 20237 - 19968: jis0208<<14 | 0x17<<7 | 0x3F, + 20238 - 19968: jis0208<<14 | 0x13<<7 | 0x4B, + 20239 - 19968: jis0208<<14 | 0x28<<7 | 0x59, + 20240 - 19968: jis0208<<14 | 0x27<<7 | 0x11, + 20241 - 19968: jis0208<<14 | 0x14<<7 | 0x38, + 20242 - 19968: jis0212<<14 | 0x0F<<7 | 0x37, + 20245 - 19968: jis0212<<14 | 0x0F<<7 | 0x38, + 20246 - 19968: jis0212<<14 | 0x0F<<7 | 0x39, + 20247 - 19968: jis0212<<14 | 0x0F<<7 | 0x3A, + 20249 - 19968: jis0212<<14 | 0x0F<<7 | 0x3B, + 20250 - 19968: jis0208<<14 | 0x11<<7 | 0x50, + 20252 - 19968: jis0208<<14 | 0x2F<<7 | 0x46, + 20253 - 19968: jis0208<<14 | 0x24<<7 | 0x20, + 20270 - 19968: jis0212<<14 | 0x0F<<7 | 0x3C, + 20271 - 19968: jis0208<<14 | 0x26<<7 | 0x4B, + 20272 - 19968: jis0208<<14 | 0x2F<<7 | 0x25, + 20273 - 19968: jis0212<<14 | 0x0F<<7 | 0x3D, + 20275 - 19968: jis0212<<14 | 0x0F<<7 | 0x3F, + 20276 - 19968: jis0208<<14 | 0x27<<7 | 0x1B, + 20277 - 19968: jis0212<<14 | 0x0F<<7 | 0x40, + 20278 - 19968: jis0208<<14 | 0x2D<<7 | 0x41, + 20279 - 19968: jis0212<<14 | 0x0F<<7 | 0x41, + 20280 - 19968: jis0208<<14 | 0x1E<<7 | 0x0C, + 20281 - 19968: jis0208<<14 | 0x58<<7 | 0x11, + 20282 - 19968: jis0208<<14 | 0x1A<<7 | 0x26, + 20283 - 19968: jis0212<<14 | 0x0F<<7 | 0x43, + 20284 - 19968: jis0208<<14 | 0x1A<<7 | 0x56, + 20285 - 19968: jis0208<<14 | 0x11<<7 | 0x1F, + 20286 - 19968: jis0212<<14 | 0x0F<<7 | 0x44, + 20288 - 19968: jis0212<<14 | 0x0F<<7 | 0x45, + 20290 - 19968: jis0212<<14 | 0x0F<<7 | 0x46, + 20291 - 19968: jis0208<<14 | 0x23<<7 | 0x30, + 20294 - 19968: jis0208<<14 | 0x22<<7 | 0x01, + 20295 - 19968: jis0208<<14 | 0x2F<<7 | 0x29, + 20296 - 19968: jis0212<<14 | 0x0F<<7 | 0x47, + 20297 - 19968: jis0212<<14 | 0x0F<<7 | 0x48, + 20299 - 19968: jis0212<<14 | 0x0F<<7 | 0x49, + 20300 - 19968: jis0212<<14 | 0x0F<<7 | 0x4A, + 20301 - 19968: jis0208<<14 | 0x0F<<7 | 0x2B, + 20302 - 19968: jis0208<<14 | 0x23<<7 | 0x42, + 20303 - 19968: jis0208<<14 | 0x1C<<7 | 0x1A, + 20304 - 19968: jis0208<<14 | 0x19<<7 | 0x13, + 20305 - 19968: jis0208<<14 | 0x2C<<7 | 0x03, + 20306 - 19968: jis0212<<14 | 0x0F<<7 | 0x4B, + 20307 - 19968: jis0208<<14 | 0x21<<7 | 0x2D, + 20308 - 19968: jis0212<<14 | 0x0F<<7 | 0x4C, + 20309 - 19968: jis0208<<14 | 0x11<<7 | 0x1E, + 20310 - 19968: jis0208<<14 | 0x58<<7 | 0x12, + 20311 - 19968: jis0208<<14 | 0x2F<<7 | 0x28, + 20312 - 19968: jis0212<<14 | 0x0F<<7 | 0x4E, + 20313 - 19968: jis0208<<14 | 0x2C<<7 | 0x1D, + 20314 - 19968: jis0208<<14 | 0x2F<<7 | 0x24, + 20315 - 19968: jis0208<<14 | 0x2F<<7 | 0x26, + 20316 - 19968: jis0208<<14 | 0x19<<7 | 0x4D, + 20317 - 19968: jis0208<<14 | 0x2F<<7 | 0x27, + 20318 - 19968: jis0208<<14 | 0x34<<7 | 0x03, + 20319 - 19968: jis0212<<14 | 0x0F<<7 | 0x4F, + 20320 - 19968: jis0212<<14 | 0x0F<<7 | 0x3E, + 20323 - 19968: jis0212<<14 | 0x0F<<7 | 0x50, + 20329 - 19968: jis0208<<14 | 0x2F<<7 | 0x2F, + 20330 - 19968: jis0212<<14 | 0x0F<<7 | 0x51, + 20332 - 19968: jis0212<<14 | 0x0F<<7 | 0x52, + 20334 - 19968: jis0212<<14 | 0x0F<<7 | 0x53, + 20335 - 19968: jis0208<<14 | 0x2F<<7 | 0x32, + 20336 - 19968: jis0208<<14 | 0x2F<<7 | 0x30, + 20337 - 19968: jis0212<<14 | 0x0F<<7 | 0x54, + 20339 - 19968: jis0208<<14 | 0x11<<7 | 0x21, + 20341 - 19968: jis0208<<14 | 0x29<<7 | 0x1A, + 20342 - 19968: jis0208<<14 | 0x2F<<7 | 0x2A, + 20343 - 19968: jis0212<<14 | 0x0F<<7 | 0x55, + 20344 - 19968: jis0212<<14 | 0x0F<<7 | 0x56, + 20345 - 19968: jis0212<<14 | 0x0F<<7 | 0x57, + 20346 - 19968: jis0212<<14 | 0x0F<<7 | 0x58, + 20347 - 19968: jis0208<<14 | 0x2F<<7 | 0x2E, + 20348 - 19968: jis0208<<14 | 0x17<<7 | 0x52, + 20349 - 19968: jis0212<<14 | 0x0F<<7 | 0x59, + 20350 - 19968: jis0212<<14 | 0x0F<<7 | 0x5A, + 20351 - 19968: jis0208<<14 | 0x1A<<7 | 0x27, + 20353 - 19968: jis0212<<14 | 0x0F<<7 | 0x5B, + 20354 - 19968: jis0212<<14 | 0x0F<<7 | 0x5C, + 20355 - 19968: jis0208<<14 | 0x13<<7 | 0x05, + 20356 - 19968: jis0212<<14 | 0x0F<<7 | 0x5D, + 20357 - 19968: jis0212<<14 | 0x10<<7 | 0x00, + 20358 - 19968: jis0208<<14 | 0x2F<<7 | 0x33, + 20360 - 19968: jis0208<<14 | 0x2F<<7 | 0x2B, + 20361 - 19968: jis0212<<14 | 0x10<<7 | 0x01, + 20362 - 19968: jis0208<<14 | 0x58<<7 | 0x14, + 20363 - 19968: jis0208<<14 | 0x2D<<7 | 0x42, + 20364 - 19968: jis0212<<14 | 0x10<<7 | 0x03, + 20365 - 19968: jis0208<<14 | 0x1A<<7 | 0x57, + 20366 - 19968: jis0212<<14 | 0x10<<7 | 0x04, + 20367 - 19968: jis0208<<14 | 0x2F<<7 | 0x2C, + 20368 - 19968: jis0212<<14 | 0x10<<7 | 0x05, + 20369 - 19968: jis0208<<14 | 0x2F<<7 | 0x31, + 20370 - 19968: jis0208<<14 | 0x58<<7 | 0x13, + 20371 - 19968: jis0212<<14 | 0x10<<7 | 0x07, + 20372 - 19968: jis0208<<14 | 0x58<<7 | 0x16, + 20374 - 19968: jis0208<<14 | 0x2F<<7 | 0x34, + 20375 - 19968: jis0212<<14 | 0x10<<7 | 0x09, + 20376 - 19968: jis0208<<14 | 0x2F<<7 | 0x2D, + 20377 - 19968: jis0212<<14 | 0x10<<7 | 0x0A, + 20378 - 19968: jis0208<<14 | 0x58<<7 | 0x15, + 20379 - 19968: jis0208<<14 | 0x15<<7 | 0x00, + 20381 - 19968: jis0208<<14 | 0x0F<<7 | 0x2C, + 20382 - 19968: jis0212<<14 | 0x10<<7 | 0x0C, + 20383 - 19968: jis0212<<14 | 0x10<<7 | 0x0D, + 20384 - 19968: jis0208<<14 | 0x15<<7 | 0x01, + 20385 - 19968: jis0208<<14 | 0x11<<7 | 0x20, + 20395 - 19968: jis0208<<14 | 0x34<<7 | 0x04, + 20397 - 19968: jis0208<<14 | 0x2A<<7 | 0x58, + 20398 - 19968: jis0208<<14 | 0x28<<7 | 0x4D, + 20399 - 19968: jis0208<<14 | 0x17<<7 | 0x53, + 20402 - 19968: jis0212<<14 | 0x10<<7 | 0x0E, + 20405 - 19968: jis0208<<14 | 0x1E<<7 | 0x0E, + 20406 - 19968: jis0208<<14 | 0x2D<<7 | 0x16, + 20407 - 19968: jis0212<<14 | 0x10<<7 | 0x0F, + 20409 - 19968: jis0212<<14 | 0x10<<7 | 0x10, + 20411 - 19968: jis0212<<14 | 0x10<<7 | 0x11, + 20412 - 19968: jis0212<<14 | 0x10<<7 | 0x12, + 20413 - 19968: jis0212<<14 | 0x10<<7 | 0x13, + 20414 - 19968: jis0212<<14 | 0x10<<7 | 0x14, + 20415 - 19968: jis0208<<14 | 0x29<<7 | 0x37, + 20416 - 19968: jis0212<<14 | 0x10<<7 | 0x15, + 20417 - 19968: jis0212<<14 | 0x10<<7 | 0x16, + 20418 - 19968: jis0208<<14 | 0x16<<7 | 0x17, + 20419 - 19968: jis0208<<14 | 0x21<<7 | 0x04, + 20420 - 19968: jis0208<<14 | 0x11<<7 | 0x43, + 20421 - 19968: jis0212<<14 | 0x10<<7 | 0x17, + 20422 - 19968: jis0212<<14 | 0x10<<7 | 0x18, + 20424 - 19968: jis0212<<14 | 0x10<<7 | 0x19, + 20425 - 19968: jis0208<<14 | 0x58<<7 | 0x05, + 20426 - 19968: jis0208<<14 | 0x1C<<7 | 0x32, + 20427 - 19968: jis0212<<14 | 0x10<<7 | 0x1B, + 20428 - 19968: jis0212<<14 | 0x10<<7 | 0x1C, + 20429 - 19968: jis0208<<14 | 0x58<<7 | 0x17, + 20430 - 19968: jis0208<<14 | 0x2F<<7 | 0x38, + 20431 - 19968: jis0212<<14 | 0x10<<7 | 0x1E, + 20432 - 19968: jis0208<<14 | 0x2F<<7 | 0x3D, + 20433 - 19968: jis0208<<14 | 0x2F<<7 | 0x3B, + 20434 - 19968: jis0212<<14 | 0x10<<7 | 0x1F, + 20436 - 19968: jis0208<<14 | 0x2F<<7 | 0x36, + 20439 - 19968: jis0208<<14 | 0x21<<7 | 0x0E, + 20440 - 19968: jis0208<<14 | 0x2F<<7 | 0x39, + 20442 - 19968: jis0208<<14 | 0x2F<<7 | 0x3C, + 20443 - 19968: jis0208<<14 | 0x2F<<7 | 0x3A, + 20444 - 19968: jis0212<<14 | 0x10<<7 | 0x20, + 20445 - 19968: jis0208<<14 | 0x29<<7 | 0x3C, + 20447 - 19968: jis0208<<14 | 0x2F<<7 | 0x37, + 20448 - 19968: jis0212<<14 | 0x10<<7 | 0x21, + 20449 - 19968: jis0208<<14 | 0x1E<<7 | 0x0D, + 20450 - 19968: jis0212<<14 | 0x10<<7 | 0x22, + 20451 - 19968: jis0208<<14 | 0x2A<<7 | 0x52, + 20452 - 19968: jis0208<<14 | 0x2F<<7 | 0x3E, + 20453 - 19968: jis0208<<14 | 0x2F<<7 | 0x3F, + 20462 - 19968: jis0208<<14 | 0x1C<<7 | 0x03, + 20463 - 19968: jis0208<<14 | 0x2F<<7 | 0x4C, + 20464 - 19968: jis0212<<14 | 0x10<<7 | 0x23, + 20466 - 19968: jis0212<<14 | 0x10<<7 | 0x24, + 20467 - 19968: jis0208<<14 | 0x26<<7 | 0x2F, + 20469 - 19968: jis0208<<14 | 0x28<<7 | 0x15, + 20470 - 19968: jis0208<<14 | 0x2F<<7 | 0x47, + 20472 - 19968: jis0208<<14 | 0x29<<7 | 0x4F, + 20474 - 19968: jis0208<<14 | 0x11<<7 | 0x15, + 20476 - 19968: jis0212<<14 | 0x10<<7 | 0x25, + 20477 - 19968: jis0212<<14 | 0x10<<7 | 0x26, + 20478 - 19968: jis0208<<14 | 0x2F<<7 | 0x4B, + 20479 - 19968: jis0208<<14 | 0x58<<7 | 0x1A, + 20480 - 19968: jis0212<<14 | 0x10<<7 | 0x28, + 20481 - 19968: jis0212<<14 | 0x10<<7 | 0x29, + 20484 - 19968: jis0212<<14 | 0x10<<7 | 0x2A, + 20485 - 19968: jis0208<<14 | 0x2F<<7 | 0x45, + 20486 - 19968: jis0208<<14 | 0x2F<<7 | 0x4E, + 20487 - 19968: jis0212<<14 | 0x10<<7 | 0x2B, + 20489 - 19968: jis0208<<14 | 0x20<<7 | 0x31, + 20490 - 19968: jis0212<<14 | 0x10<<7 | 0x2C, + 20491 - 19968: jis0208<<14 | 0x17<<7 | 0x23, + 20492 - 19968: jis0212<<14 | 0x10<<7 | 0x2D, + 20493 - 19968: jis0208<<14 | 0x26<<7 | 0x3B, + 20494 - 19968: jis0212<<14 | 0x10<<7 | 0x2E, + 20495 - 19968: jis0208<<14 | 0x3F<<7 | 0x26, + 20496 - 19968: jis0212<<14 | 0x10<<7 | 0x2F, + 20497 - 19968: jis0208<<14 | 0x2F<<7 | 0x4D, + 20498 - 19968: jis0208<<14 | 0x24<<7 | 0x3C, + 20499 - 19968: jis0212<<14 | 0x10<<7 | 0x30, + 20500 - 19968: jis0208<<14 | 0x2F<<7 | 0x42, + 20502 - 19968: jis0208<<14 | 0x17<<7 | 0x55, + 20503 - 19968: jis0212<<14 | 0x10<<7 | 0x31, + 20504 - 19968: jis0212<<14 | 0x10<<7 | 0x32, + 20505 - 19968: jis0208<<14 | 0x17<<7 | 0x54, + 20506 - 19968: jis0208<<14 | 0x2F<<7 | 0x40, + 20507 - 19968: jis0212<<14 | 0x10<<7 | 0x33, + 20508 - 19968: jis0212<<14 | 0x10<<7 | 0x34, + 20509 - 19968: jis0212<<14 | 0x10<<7 | 0x35, + 20510 - 19968: jis0208<<14 | 0x58<<7 | 0x1B, + 20511 - 19968: jis0208<<14 | 0x1B<<7 | 0x39, + 20513 - 19968: jis0208<<14 | 0x2F<<7 | 0x48, + 20514 - 19968: jis0208<<14 | 0x58<<7 | 0x19, + 20515 - 19968: jis0208<<14 | 0x29<<7 | 0x4E, + 20516 - 19968: jis0208<<14 | 0x22<<7 | 0x2C, + 20517 - 19968: jis0208<<14 | 0x2F<<7 | 0x44, + 20518 - 19968: jis0208<<14 | 0x16<<7 | 0x50, + 20519 - 19968: jis0212<<14 | 0x10<<7 | 0x38, + 20520 - 19968: jis0208<<14 | 0x2F<<7 | 0x41, + 20521 - 19968: jis0208<<14 | 0x2F<<7 | 0x49, + 20522 - 19968: jis0208<<14 | 0x2F<<7 | 0x43, + 20523 - 19968: jis0208<<14 | 0x2D<<7 | 0x30, + 20524 - 19968: jis0208<<14 | 0x2F<<7 | 0x4A, + 20525 - 19968: jis0208<<14 | 0x2E<<7 | 0x20, + 20526 - 19968: jis0212<<14 | 0x10<<7 | 0x39, + 20528 - 19968: jis0212<<14 | 0x10<<7 | 0x3A, + 20530 - 19968: jis0212<<14 | 0x10<<7 | 0x3B, + 20531 - 19968: jis0212<<14 | 0x10<<7 | 0x3C, + 20533 - 19968: jis0212<<14 | 0x10<<7 | 0x3D, + 20534 - 19968: jis0208<<14 | 0x15<<7 | 0x45, + 20537 - 19968: jis0208<<14 | 0x16<<7 | 0x4F, + 20539 - 19968: jis0212<<14 | 0x10<<7 | 0x55, + 20544 - 19968: jis0208<<14 | 0x58<<7 | 0x18, + 20545 - 19968: jis0212<<14 | 0x10<<7 | 0x3F, + 20546 - 19968: jis0208<<14 | 0x58<<7 | 0x1E, + 20547 - 19968: jis0208<<14 | 0x2F<<7 | 0x4F, + 20549 - 19968: jis0212<<14 | 0x10<<7 | 0x41, + 20550 - 19968: jis0208<<14 | 0x58<<7 | 0x1C, + 20551 - 19968: jis0208<<14 | 0x2F<<7 | 0x50, + 20552 - 19968: jis0208<<14 | 0x2F<<7 | 0x54, + 20553 - 19968: jis0208<<14 | 0x0F<<7 | 0x2D, + 20554 - 19968: jis0212<<14 | 0x10<<7 | 0x43, + 20556 - 19968: jis0212<<14 | 0x10<<7 | 0x44, + 20558 - 19968: jis0212<<14 | 0x10<<7 | 0x45, + 20559 - 19968: jis0208<<14 | 0x29<<7 | 0x2F, + 20560 - 19968: jis0208<<14 | 0x2F<<7 | 0x53, + 20561 - 19968: jis0212<<14 | 0x10<<7 | 0x46, + 20562 - 19968: jis0212<<14 | 0x10<<7 | 0x47, + 20563 - 19968: jis0212<<14 | 0x10<<7 | 0x48, + 20565 - 19968: jis0208<<14 | 0x2F<<7 | 0x52, + 20566 - 19968: jis0208<<14 | 0x2F<<7 | 0x56, + 20567 - 19968: jis0212<<14 | 0x10<<7 | 0x49, + 20569 - 19968: jis0212<<14 | 0x10<<7 | 0x4A, + 20570 - 19968: jis0208<<14 | 0x2F<<7 | 0x55, + 20572 - 19968: jis0208<<14 | 0x23<<7 | 0x43, + 20575 - 19968: jis0212<<14 | 0x10<<7 | 0x4B, + 20576 - 19968: jis0212<<14 | 0x10<<7 | 0x4C, + 20578 - 19968: jis0212<<14 | 0x10<<7 | 0x4D, + 20579 - 19968: jis0212<<14 | 0x10<<7 | 0x4E, + 20581 - 19968: jis0208<<14 | 0x16<<7 | 0x51, + 20582 - 19968: jis0212<<14 | 0x10<<7 | 0x4F, + 20583 - 19968: jis0212<<14 | 0x10<<7 | 0x50, + 20586 - 19968: jis0212<<14 | 0x10<<7 | 0x51, + 20588 - 19968: jis0208<<14 | 0x2F<<7 | 0x57, + 20589 - 19968: jis0212<<14 | 0x10<<7 | 0x52, + 20592 - 19968: jis0208<<14 | 0x58<<7 | 0x1D, + 20593 - 19968: jis0212<<14 | 0x10<<7 | 0x54, + 20594 - 19968: jis0208<<14 | 0x1B<<7 | 0x24, + 20596 - 19968: jis0208<<14 | 0x21<<7 | 0x05, + 20597 - 19968: jis0208<<14 | 0x23<<7 | 0x44, + 20598 - 19968: jis0208<<14 | 0x15<<7 | 0x55, + 20600 - 19968: jis0208<<14 | 0x2F<<7 | 0x58, + 20605 - 19968: jis0208<<14 | 0x14<<7 | 0x15, + 20608 - 19968: jis0208<<14 | 0x2F<<7 | 0x59, + 20609 - 19968: jis0212<<14 | 0x10<<7 | 0x56, + 20611 - 19968: jis0212<<14 | 0x10<<7 | 0x57, + 20612 - 19968: jis0212<<14 | 0x10<<7 | 0x58, + 20613 - 19968: jis0208<<14 | 0x2F<<7 | 0x5B, + 20614 - 19968: jis0212<<14 | 0x10<<7 | 0x59, + 20618 - 19968: jis0212<<14 | 0x10<<7 | 0x5A, + 20621 - 19968: jis0208<<14 | 0x2A<<7 | 0x14, + 20622 - 19968: jis0212<<14 | 0x10<<7 | 0x5B, + 20623 - 19968: jis0212<<14 | 0x10<<7 | 0x5C, + 20624 - 19968: jis0212<<14 | 0x10<<7 | 0x5D, + 20625 - 19968: jis0208<<14 | 0x16<<7 | 0x45, + 20626 - 19968: jis0212<<14 | 0x11<<7 | 0x00, + 20627 - 19968: jis0212<<14 | 0x11<<7 | 0x01, + 20628 - 19968: jis0208<<14 | 0x58<<7 | 0x1F, + 20630 - 19968: jis0212<<14 | 0x11<<7 | 0x03, + 20632 - 19968: jis0208<<14 | 0x1A<<7 | 0x10, + 20633 - 19968: jis0208<<14 | 0x27<<7 | 0x56, + 20634 - 19968: jis0208<<14 | 0x2F<<7 | 0x5A, + 20635 - 19968: jis0212<<14 | 0x11<<7 | 0x04, + 20636 - 19968: jis0212<<14 | 0x11<<7 | 0x05, + 20638 - 19968: jis0212<<14 | 0x11<<7 | 0x06, + 20639 - 19968: jis0212<<14 | 0x11<<7 | 0x07, + 20640 - 19968: jis0212<<14 | 0x11<<7 | 0x08, + 20641 - 19968: jis0212<<14 | 0x11<<7 | 0x09, + 20642 - 19968: jis0212<<14 | 0x11<<7 | 0x0A, + 20650 - 19968: jis0212<<14 | 0x11<<7 | 0x0B, + 20652 - 19968: jis0208<<14 | 0x19<<7 | 0x24, + 20653 - 19968: jis0208<<14 | 0x2C<<7 | 0x22, + 20655 - 19968: jis0212<<14 | 0x11<<7 | 0x0C, + 20656 - 19968: jis0212<<14 | 0x11<<7 | 0x0D, + 20658 - 19968: jis0208<<14 | 0x2F<<7 | 0x5D, + 20659 - 19968: jis0208<<14 | 0x30<<7 | 0x02, + 20660 - 19968: jis0208<<14 | 0x2F<<7 | 0x5C, + 20661 - 19968: jis0208<<14 | 0x19<<7 | 0x23, + 20663 - 19968: jis0208<<14 | 0x1C<<7 | 0x5C, + 20665 - 19968: jis0212<<14 | 0x11<<7 | 0x0E, + 20666 - 19968: jis0212<<14 | 0x11<<7 | 0x0F, + 20669 - 19968: jis0212<<14 | 0x11<<7 | 0x10, + 20670 - 19968: jis0208<<14 | 0x16<<7 | 0x18, + 20672 - 19968: jis0212<<14 | 0x11<<7 | 0x11, + 20674 - 19968: jis0208<<14 | 0x30<<7 | 0x03, + 20675 - 19968: jis0212<<14 | 0x11<<7 | 0x12, + 20676 - 19968: jis0212<<14 | 0x11<<7 | 0x13, + 20677 - 19968: jis0208<<14 | 0x15<<7 | 0x2E, + 20679 - 19968: jis0212<<14 | 0x11<<7 | 0x14, + 20681 - 19968: jis0208<<14 | 0x30<<7 | 0x00, + 20682 - 19968: jis0208<<14 | 0x30<<7 | 0x01, + 20684 - 19968: jis0212<<14 | 0x11<<7 | 0x15, + 20685 - 19968: jis0208<<14 | 0x25<<7 | 0x0E, + 20686 - 19968: jis0212<<14 | 0x11<<7 | 0x16, + 20687 - 19968: jis0208<<14 | 0x20<<7 | 0x5B, + 20688 - 19968: jis0212<<14 | 0x11<<7 | 0x17, + 20689 - 19968: jis0208<<14 | 0x15<<7 | 0x02, + 20691 - 19968: jis0212<<14 | 0x11<<7 | 0x18, + 20692 - 19968: jis0212<<14 | 0x11<<7 | 0x19, + 20693 - 19968: jis0208<<14 | 0x2A<<7 | 0x2C, + 20694 - 19968: jis0208<<14 | 0x30<<7 | 0x04, + 20696 - 19968: jis0208<<14 | 0x58<<7 | 0x21, + 20698 - 19968: jis0208<<14 | 0x2D<<7 | 0x1C, + 20700 - 19968: jis0212<<14 | 0x11<<7 | 0x1B, + 20701 - 19968: jis0212<<14 | 0x11<<7 | 0x1C, + 20702 - 19968: jis0208<<14 | 0x30<<7 | 0x05, + 20703 - 19968: jis0212<<14 | 0x11<<7 | 0x1D, + 20706 - 19968: jis0212<<14 | 0x11<<7 | 0x1E, + 20707 - 19968: jis0208<<14 | 0x30<<7 | 0x08, + 20708 - 19968: jis0212<<14 | 0x11<<7 | 0x1F, + 20709 - 19968: jis0208<<14 | 0x30<<7 | 0x06, + 20710 - 19968: jis0212<<14 | 0x11<<7 | 0x20, + 20711 - 19968: jis0208<<14 | 0x20<<7 | 0x2D, + 20712 - 19968: jis0212<<14 | 0x11<<7 | 0x21, + 20713 - 19968: jis0212<<14 | 0x11<<7 | 0x22, + 20717 - 19968: jis0208<<14 | 0x30<<7 | 0x07, + 20718 - 19968: jis0208<<14 | 0x30<<7 | 0x09, + 20719 - 19968: jis0212<<14 | 0x11<<7 | 0x23, + 20721 - 19968: jis0212<<14 | 0x11<<7 | 0x24, + 20722 - 19968: jis0212<<14 | 0x11<<7 | 0x30, + 20724 - 19968: jis0208<<14 | 0x58<<7 | 0x20, + 20725 - 19968: jis0208<<14 | 0x30<<7 | 0x0B, + 20726 - 19968: jis0212<<14 | 0x11<<7 | 0x25, + 20729 - 19968: jis0208<<14 | 0x30<<7 | 0x0A, + 20730 - 19968: jis0212<<14 | 0x11<<7 | 0x26, + 20731 - 19968: jis0208<<14 | 0x29<<7 | 0x27, + 20734 - 19968: jis0212<<14 | 0x11<<7 | 0x27, + 20736 - 19968: jis0208<<14 | 0x14<<7 | 0x16, + 20737 - 19968: jis0208<<14 | 0x30<<7 | 0x0D, + 20738 - 19968: jis0208<<14 | 0x30<<7 | 0x0E, + 20739 - 19968: jis0212<<14 | 0x11<<7 | 0x28, + 20740 - 19968: jis0208<<14 | 0x11<<7 | 0x0E, + 20742 - 19968: jis0212<<14 | 0x11<<7 | 0x29, + 20743 - 19968: jis0212<<14 | 0x11<<7 | 0x2A, + 20744 - 19968: jis0212<<14 | 0x11<<7 | 0x2B, + 20745 - 19968: jis0208<<14 | 0x30<<7 | 0x0C, + 20747 - 19968: jis0212<<14 | 0x11<<7 | 0x2C, + 20748 - 19968: jis0212<<14 | 0x11<<7 | 0x2D, + 20749 - 19968: jis0212<<14 | 0x11<<7 | 0x2E, + 20750 - 19968: jis0212<<14 | 0x11<<7 | 0x2F, + 20752 - 19968: jis0212<<14 | 0x11<<7 | 0x31, + 20754 - 19968: jis0208<<14 | 0x1B<<7 | 0x53, + 20756 - 19968: jis0208<<14 | 0x30<<7 | 0x11, + 20757 - 19968: jis0208<<14 | 0x30<<7 | 0x10, + 20758 - 19968: jis0208<<14 | 0x30<<7 | 0x0F, + 20759 - 19968: jis0212<<14 | 0x11<<7 | 0x32, + 20760 - 19968: jis0208<<14 | 0x2F<<7 | 0x35, + 20761 - 19968: jis0212<<14 | 0x11<<7 | 0x33, + 20762 - 19968: jis0208<<14 | 0x30<<7 | 0x12, + 20763 - 19968: jis0212<<14 | 0x11<<7 | 0x34, + 20764 - 19968: jis0212<<14 | 0x11<<7 | 0x35, + 20765 - 19968: jis0212<<14 | 0x11<<7 | 0x36, + 20766 - 19968: jis0212<<14 | 0x11<<7 | 0x37, + 20767 - 19968: jis0208<<14 | 0x1C<<7 | 0x5D, + 20769 - 19968: jis0208<<14 | 0x30<<7 | 0x13, + 20771 - 19968: jis0212<<14 | 0x11<<7 | 0x38, + 20775 - 19968: jis0212<<14 | 0x11<<7 | 0x39, + 20776 - 19968: jis0212<<14 | 0x11<<7 | 0x3A, + 20778 - 19968: jis0208<<14 | 0x2C<<7 | 0x04, + 20780 - 19968: jis0212<<14 | 0x11<<7 | 0x3B, + 20781 - 19968: jis0212<<14 | 0x11<<7 | 0x3C, + 20783 - 19968: jis0212<<14 | 0x11<<7 | 0x3D, + 20785 - 19968: jis0212<<14 | 0x11<<7 | 0x3E, + 20786 - 19968: jis0208<<14 | 0x2B<<7 | 0x38, + 20787 - 19968: jis0212<<14 | 0x11<<7 | 0x3F, + 20788 - 19968: jis0212<<14 | 0x11<<7 | 0x40, + 20789 - 19968: jis0212<<14 | 0x11<<7 | 0x41, + 20791 - 19968: jis0208<<14 | 0x30<<7 | 0x15, + 20792 - 19968: jis0212<<14 | 0x11<<7 | 0x42, + 20793 - 19968: jis0212<<14 | 0x11<<7 | 0x43, + 20794 - 19968: jis0208<<14 | 0x30<<7 | 0x14, + 20795 - 19968: jis0208<<14 | 0x30<<7 | 0x17, + 20796 - 19968: jis0208<<14 | 0x30<<7 | 0x16, + 20799 - 19968: jis0208<<14 | 0x30<<7 | 0x18, + 20800 - 19968: jis0208<<14 | 0x30<<7 | 0x19, + 20801 - 19968: jis0208<<14 | 0x0F<<7 | 0x53, + 20802 - 19968: jis0212<<14 | 0x11<<7 | 0x44, + 20803 - 19968: jis0208<<14 | 0x17<<7 | 0x14, + 20804 - 19968: jis0208<<14 | 0x16<<7 | 0x1A, + 20805 - 19968: jis0208<<14 | 0x1C<<7 | 0x1B, + 20806 - 19968: jis0208<<14 | 0x22<<7 | 0x5A, + 20807 - 19968: jis0208<<14 | 0x15<<7 | 0x03, + 20808 - 19968: jis0208<<14 | 0x1F<<7 | 0x47, + 20809 - 19968: jis0208<<14 | 0x17<<7 | 0x56, + 20810 - 19968: jis0208<<14 | 0x58<<7 | 0x22, + 20811 - 19968: jis0208<<14 | 0x18<<7 | 0x4D, + 20812 - 19968: jis0208<<14 | 0x30<<7 | 0x1B, + 20813 - 19968: jis0208<<14 | 0x2B<<7 | 0x27, + 20814 - 19968: jis0208<<14 | 0x24<<7 | 0x25, + 20815 - 19968: jis0212<<14 | 0x11<<7 | 0x46, + 20816 - 19968: jis0208<<14 | 0x1A<<7 | 0x58, + 20818 - 19968: jis0208<<14 | 0x30<<7 | 0x1A, + 20819 - 19968: jis0212<<14 | 0x11<<7 | 0x47, + 20820 - 19968: jis0208<<14 | 0x30<<7 | 0x1C, + 20821 - 19968: jis0212<<14 | 0x11<<7 | 0x48, + 20823 - 19968: jis0212<<14 | 0x11<<7 | 0x49, + 20824 - 19968: jis0212<<14 | 0x11<<7 | 0x4A, + 20826 - 19968: jis0208<<14 | 0x24<<7 | 0x3D, + 20828 - 19968: jis0208<<14 | 0x12<<7 | 0x54, + 20831 - 19968: jis0212<<14 | 0x11<<7 | 0x4B, + 20834 - 19968: jis0208<<14 | 0x30<<7 | 0x1D, + 20836 - 19968: jis0208<<14 | 0x58<<7 | 0x23, + 20837 - 19968: jis0208<<14 | 0x25<<7 | 0x5D, + 20838 - 19968: jis0212<<14 | 0x11<<7 | 0x4D, + 20840 - 19968: jis0208<<14 | 0x20<<7 | 0x13, + 20841 - 19968: jis0208<<14 | 0x30<<7 | 0x1F, + 20842 - 19968: jis0208<<14 | 0x30<<7 | 0x20, + 20843 - 19968: jis0208<<14 | 0x27<<7 | 0x0B, + 20844 - 19968: jis0208<<14 | 0x17<<7 | 0x57, + 20845 - 19968: jis0208<<14 | 0x2E<<7 | 0x1A, + 20846 - 19968: jis0208<<14 | 0x30<<7 | 0x21, + 20849 - 19968: jis0208<<14 | 0x15<<7 | 0x05, + 20853 - 19968: jis0208<<14 | 0x29<<7 | 0x1B, + 20854 - 19968: jis0208<<14 | 0x21<<7 | 0x15, + 20855 - 19968: jis0208<<14 | 0x15<<7 | 0x50, + 20856 - 19968: jis0208<<14 | 0x24<<7 | 0x14, + 20860 - 19968: jis0208<<14 | 0x16<<7 | 0x52, + 20862 - 19968: jis0212<<14 | 0x11<<7 | 0x4E, + 20864 - 19968: jis0208<<14 | 0x30<<7 | 0x22, + 20866 - 19968: jis0208<<14 | 0x30<<7 | 0x23, + 20867 - 19968: jis0212<<14 | 0x11<<7 | 0x4F, + 20868 - 19968: jis0212<<14 | 0x11<<7 | 0x50, + 20869 - 19968: jis0208<<14 | 0x25<<7 | 0x41, + 20870 - 19968: jis0208<<14 | 0x10<<7 | 0x3E, + 20873 - 19968: jis0208<<14 | 0x30<<7 | 0x26, + 20874 - 19968: jis0208<<14 | 0x19<<7 | 0x5C, + 20875 - 19968: jis0212<<14 | 0x11<<7 | 0x51, + 20876 - 19968: jis0208<<14 | 0x30<<7 | 0x25, + 20877 - 19968: jis0208<<14 | 0x19<<7 | 0x25, + 20878 - 19968: jis0212<<14 | 0x11<<7 | 0x52, + 20879 - 19968: jis0208<<14 | 0x30<<7 | 0x27, + 20880 - 19968: jis0208<<14 | 0x45<<7 | 0x4D, + 20881 - 19968: jis0208<<14 | 0x30<<7 | 0x28, + 20882 - 19968: jis0208<<14 | 0x2A<<7 | 0x20, + 20883 - 19968: jis0208<<14 | 0x30<<7 | 0x29, + 20885 - 19968: jis0208<<14 | 0x30<<7 | 0x2A, + 20886 - 19968: jis0208<<14 | 0x30<<7 | 0x2B, + 20887 - 19968: jis0208<<14 | 0x1D<<7 | 0x48, + 20888 - 19968: jis0212<<14 | 0x11<<7 | 0x53, + 20889 - 19968: jis0208<<14 | 0x1B<<7 | 0x2B, + 20893 - 19968: jis0208<<14 | 0x58<<7 | 0x24, + 20896 - 19968: jis0208<<14 | 0x13<<7 | 0x06, + 20897 - 19968: jis0212<<14 | 0x11<<7 | 0x55, + 20898 - 19968: jis0208<<14 | 0x30<<7 | 0x2E, + 20899 - 19968: jis0212<<14 | 0x11<<7 | 0x56, + 20900 - 19968: jis0208<<14 | 0x30<<7 | 0x2C, + 20901 - 19968: jis0208<<14 | 0x2B<<7 | 0x1C, + 20902 - 19968: jis0208<<14 | 0x30<<7 | 0x2D, + 20904 - 19968: jis0208<<14 | 0x28<<7 | 0x39, + 20905 - 19968: jis0208<<14 | 0x30<<7 | 0x2F, + 20906 - 19968: jis0208<<14 | 0x30<<7 | 0x30, + 20907 - 19968: jis0208<<14 | 0x30<<7 | 0x31, + 20908 - 19968: jis0208<<14 | 0x24<<7 | 0x3E, + 20909 - 19968: jis0212<<14 | 0x11<<7 | 0x57, + 20912 - 19968: jis0208<<14 | 0x30<<7 | 0x35, + 20913 - 19968: jis0208<<14 | 0x30<<7 | 0x33, + 20914 - 19968: jis0208<<14 | 0x30<<7 | 0x34, + 20915 - 19968: jis0208<<14 | 0x30<<7 | 0x32, + 20916 - 19968: jis0208<<14 | 0x19<<7 | 0x42, + 20917 - 19968: jis0208<<14 | 0x30<<7 | 0x36, + 20918 - 19968: jis0208<<14 | 0x2B<<7 | 0x49, + 20919 - 19968: jis0208<<14 | 0x2D<<7 | 0x43, + 20920 - 19968: jis0212<<14 | 0x11<<7 | 0x58, + 20922 - 19968: jis0212<<14 | 0x11<<7 | 0x59, + 20924 - 19968: jis0212<<14 | 0x11<<7 | 0x5A, + 20925 - 19968: jis0208<<14 | 0x30<<7 | 0x37, + 20926 - 19968: jis0208<<14 | 0x58<<7 | 0x25, + 20927 - 19968: jis0212<<14 | 0x11<<7 | 0x5C, + 20930 - 19968: jis0212<<14 | 0x11<<7 | 0x5D, + 20932 - 19968: jis0208<<14 | 0x1F<<7 | 0x07, + 20933 - 19968: jis0208<<14 | 0x30<<7 | 0x38, + 20934 - 19968: jis0208<<14 | 0x1C<<7 | 0x39, + 20936 - 19968: jis0212<<14 | 0x12<<7 | 0x00, + 20937 - 19968: jis0208<<14 | 0x30<<7 | 0x39, + 20939 - 19968: jis0208<<14 | 0x22<<7 | 0x5B, + 20940 - 19968: jis0208<<14 | 0x2D<<7 | 0x1E, + 20941 - 19968: jis0208<<14 | 0x24<<7 | 0x3F, + 20943 - 19968: jis0212<<14 | 0x12<<7 | 0x01, + 20945 - 19968: jis0212<<14 | 0x12<<7 | 0x02, + 20946 - 19968: jis0212<<14 | 0x12<<7 | 0x03, + 20947 - 19968: jis0212<<14 | 0x12<<7 | 0x04, + 20949 - 19968: jis0212<<14 | 0x12<<7 | 0x05, + 20950 - 19968: jis0208<<14 | 0x31<<7 | 0x24, + 20952 - 19968: jis0212<<14 | 0x12<<7 | 0x06, + 20955 - 19968: jis0208<<14 | 0x30<<7 | 0x3A, + 20956 - 19968: jis0208<<14 | 0x53<<7 | 0x04, + 20957 - 19968: jis0208<<14 | 0x15<<7 | 0x24, + 20958 - 19968: jis0212<<14 | 0x12<<7 | 0x07, + 20960 - 19968: jis0208<<14 | 0x30<<7 | 0x3B, + 20961 - 19968: jis0208<<14 | 0x2A<<7 | 0x3D, + 20962 - 19968: jis0212<<14 | 0x12<<7 | 0x08, + 20965 - 19968: jis0212<<14 | 0x12<<7 | 0x09, + 20966 - 19968: jis0208<<14 | 0x1C<<7 | 0x47, + 20967 - 19968: jis0208<<14 | 0x21<<7 | 0x5B, + 20969 - 19968: jis0208<<14 | 0x30<<7 | 0x3D, + 20970 - 19968: jis0208<<14 | 0x25<<7 | 0x43, + 20972 - 19968: jis0208<<14 | 0x58<<7 | 0x26, + 20973 - 19968: jis0208<<14 | 0x30<<7 | 0x3E, + 20974 - 19968: jis0212<<14 | 0x12<<7 | 0x0A, + 20976 - 19968: jis0208<<14 | 0x30<<7 | 0x3F, + 20977 - 19968: jis0208<<14 | 0x12<<7 | 0x0D, + 20978 - 19968: jis0212<<14 | 0x12<<7 | 0x0B, + 20979 - 19968: jis0212<<14 | 0x12<<7 | 0x0C, + 20980 - 19968: jis0212<<14 | 0x12<<7 | 0x0D, + 20981 - 19968: jis0208<<14 | 0x30<<7 | 0x40, + 20982 - 19968: jis0208<<14 | 0x15<<7 | 0x06, + 20983 - 19968: jis0212<<14 | 0x12<<7 | 0x0E, + 20984 - 19968: jis0208<<14 | 0x25<<7 | 0x2B, + 20985 - 19968: jis0208<<14 | 0x10<<7 | 0x59, + 20986 - 19968: jis0208<<14 | 0x1C<<7 | 0x2F, + 20989 - 19968: jis0208<<14 | 0x27<<7 | 0x00, + 20990 - 19968: jis0208<<14 | 0x30<<7 | 0x41, + 20992 - 19968: jis0208<<14 | 0x24<<7 | 0x40, + 20993 - 19968: jis0212<<14 | 0x12<<7 | 0x0F, + 20994 - 19968: jis0212<<14 | 0x12<<7 | 0x10, + 20995 - 19968: jis0208<<14 | 0x1E<<7 | 0x2E, + 20996 - 19968: jis0208<<14 | 0x30<<7 | 0x42, + 20997 - 19968: jis0212<<14 | 0x12<<7 | 0x11, + 20998 - 19968: jis0208<<14 | 0x29<<7 | 0x0B, + 20999 - 19968: jis0208<<14 | 0x1F<<7 | 0x39, + 21000 - 19968: jis0208<<14 | 0x13<<7 | 0x01, + 21002 - 19968: jis0208<<14 | 0x13<<7 | 0x08, + 21003 - 19968: jis0208<<14 | 0x30<<7 | 0x43, + 21006 - 19968: jis0208<<14 | 0x30<<7 | 0x45, + 21009 - 19968: jis0208<<14 | 0x16<<7 | 0x19, + 21010 - 19968: jis0212<<14 | 0x12<<7 | 0x12, + 21011 - 19968: jis0212<<14 | 0x12<<7 | 0x13, + 21012 - 19968: jis0208<<14 | 0x30<<7 | 0x44, + 21013 - 19968: jis0208<<14 | 0x58<<7 | 0x27, + 21014 - 19968: jis0212<<14 | 0x12<<7 | 0x15, + 21015 - 19968: jis0208<<14 | 0x2D<<7 | 0x52, + 21016 - 19968: jis0212<<14 | 0x12<<7 | 0x16, + 21021 - 19968: jis0208<<14 | 0x1C<<7 | 0x48, + 21026 - 19968: jis0212<<14 | 0x12<<7 | 0x17, + 21028 - 19968: jis0208<<14 | 0x27<<7 | 0x1C, + 21029 - 19968: jis0208<<14 | 0x29<<7 | 0x2B, + 21031 - 19968: jis0208<<14 | 0x30<<7 | 0x46, + 21032 - 19968: jis0212<<14 | 0x12<<7 | 0x18, + 21033 - 19968: jis0208<<14 | 0x2C<<7 | 0x57, + 21034 - 19968: jis0208<<14 | 0x30<<7 | 0x47, + 21038 - 19968: jis0208<<14 | 0x30<<7 | 0x48, + 21040 - 19968: jis0208<<14 | 0x24<<7 | 0x5D, + 21041 - 19968: jis0212<<14 | 0x12<<7 | 0x19, + 21042 - 19968: jis0212<<14 | 0x12<<7 | 0x1A, + 21043 - 19968: jis0208<<14 | 0x30<<7 | 0x49, + 21045 - 19968: jis0212<<14 | 0x12<<7 | 0x1B, + 21046 - 19968: jis0208<<14 | 0x1F<<7 | 0x08, + 21047 - 19968: jis0208<<14 | 0x19<<7 | 0x5D, + 21048 - 19968: jis0208<<14 | 0x16<<7 | 0x53, + 21049 - 19968: jis0208<<14 | 0x30<<7 | 0x4A, + 21050 - 19968: jis0208<<14 | 0x1A<<7 | 0x28, + 21051 - 19968: jis0208<<14 | 0x18<<7 | 0x4E, + 21052 - 19968: jis0212<<14 | 0x12<<7 | 0x1C, + 21059 - 19968: jis0208<<14 | 0x23<<7 | 0x45, + 21060 - 19968: jis0208<<14 | 0x30<<7 | 0x4C, + 21061 - 19968: jis0212<<14 | 0x12<<7 | 0x1D, + 21063 - 19968: jis0208<<14 | 0x21<<7 | 0x06, + 21065 - 19968: jis0212<<14 | 0x12<<7 | 0x1E, + 21066 - 19968: jis0208<<14 | 0x19<<7 | 0x4E, + 21067 - 19968: jis0208<<14 | 0x30<<7 | 0x4D, + 21068 - 19968: jis0208<<14 | 0x30<<7 | 0x4E, + 21069 - 19968: jis0208<<14 | 0x20<<7 | 0x0F, + 21071 - 19968: jis0208<<14 | 0x30<<7 | 0x4B, + 21076 - 19968: jis0208<<14 | 0x30<<7 | 0x50, + 21077 - 19968: jis0212<<14 | 0x12<<7 | 0x1F, + 21078 - 19968: jis0208<<14 | 0x2A<<7 | 0x15, + 21079 - 19968: jis0212<<14 | 0x12<<7 | 0x20, + 21080 - 19968: jis0212<<14 | 0x12<<7 | 0x21, + 21082 - 19968: jis0212<<14 | 0x12<<7 | 0x22, + 21083 - 19968: jis0208<<14 | 0x18<<7 | 0x43, + 21084 - 19968: jis0212<<14 | 0x12<<7 | 0x23, + 21086 - 19968: jis0208<<14 | 0x30<<7 | 0x4F, + 21087 - 19968: jis0212<<14 | 0x12<<7 | 0x24, + 21088 - 19968: jis0212<<14 | 0x12<<7 | 0x25, + 21089 - 19968: jis0212<<14 | 0x12<<7 | 0x26, + 21091 - 19968: jis0208<<14 | 0x16<<7 | 0x54, + 21092 - 19968: jis0208<<14 | 0x19<<7 | 0x3D, + 21093 - 19968: jis0208<<14 | 0x26<<7 | 0x4C, + 21094 - 19968: jis0212<<14 | 0x12<<7 | 0x27, + 21097 - 19968: jis0208<<14 | 0x30<<7 | 0x53, + 21098 - 19968: jis0208<<14 | 0x30<<7 | 0x51, + 21102 - 19968: jis0212<<14 | 0x12<<7 | 0x28, + 21103 - 19968: jis0208<<14 | 0x28<<7 | 0x5A, + 21104 - 19968: jis0208<<14 | 0x1D<<7 | 0x49, + 21105 - 19968: jis0208<<14 | 0x30<<7 | 0x5A, + 21106 - 19968: jis0208<<14 | 0x12<<7 | 0x43, + 21107 - 19968: jis0208<<14 | 0x30<<7 | 0x54, + 21108 - 19968: jis0208<<14 | 0x30<<7 | 0x52, + 21109 - 19968: jis0208<<14 | 0x20<<7 | 0x2E, + 21111 - 19968: jis0212<<14 | 0x12<<7 | 0x29, + 21112 - 19968: jis0212<<14 | 0x12<<7 | 0x2A, + 21113 - 19968: jis0212<<14 | 0x12<<7 | 0x2B, + 21117 - 19968: jis0208<<14 | 0x30<<7 | 0x56, + 21119 - 19968: jis0208<<14 | 0x30<<7 | 0x55, + 21120 - 19968: jis0212<<14 | 0x12<<7 | 0x2C, + 21122 - 19968: jis0212<<14 | 0x12<<7 | 0x2D, + 21123 - 19968: jis0208<<14 | 0x12<<7 | 0x23, + 21125 - 19968: jis0212<<14 | 0x12<<7 | 0x2E, + 21127 - 19968: jis0208<<14 | 0x16<<7 | 0x3F, + 21128 - 19968: jis0208<<14 | 0x30<<7 | 0x5B, + 21129 - 19968: jis0208<<14 | 0x2D<<7 | 0x0C, + 21130 - 19968: jis0212<<14 | 0x12<<7 | 0x2F, + 21132 - 19968: jis0212<<14 | 0x12<<7 | 0x30, + 21133 - 19968: jis0208<<14 | 0x30<<7 | 0x57, + 21137 - 19968: jis0208<<14 | 0x30<<7 | 0x5C, + 21138 - 19968: jis0208<<14 | 0x30<<7 | 0x59, + 21139 - 19968: jis0212<<14 | 0x12<<7 | 0x31, + 21140 - 19968: jis0208<<14 | 0x30<<7 | 0x58, + 21141 - 19968: jis0212<<14 | 0x12<<7 | 0x32, + 21142 - 19968: jis0212<<14 | 0x12<<7 | 0x33, + 21143 - 19968: jis0212<<14 | 0x12<<7 | 0x34, + 21144 - 19968: jis0212<<14 | 0x12<<7 | 0x35, + 21146 - 19968: jis0212<<14 | 0x12<<7 | 0x36, + 21147 - 19968: jis0208<<14 | 0x2D<<7 | 0x2E, + 21148 - 19968: jis0208<<14 | 0x58<<7 | 0x28, + 21151 - 19968: jis0208<<14 | 0x17<<7 | 0x58, + 21152 - 19968: jis0208<<14 | 0x11<<7 | 0x22, + 21155 - 19968: jis0208<<14 | 0x2D<<7 | 0x53, + 21156 - 19968: jis0212<<14 | 0x12<<7 | 0x38, + 21157 - 19968: jis0212<<14 | 0x12<<7 | 0x39, + 21158 - 19968: jis0208<<14 | 0x58<<7 | 0x29, + 21159 - 19968: jis0212<<14 | 0x12<<7 | 0x3B, + 21161 - 19968: jis0208<<14 | 0x1C<<7 | 0x54, + 21162 - 19968: jis0208<<14 | 0x24<<7 | 0x37, + 21163 - 19968: jis0208<<14 | 0x18<<7 | 0x44, + 21164 - 19968: jis0208<<14 | 0x31<<7 | 0x01, + 21165 - 19968: jis0208<<14 | 0x31<<7 | 0x02, + 21167 - 19968: jis0208<<14 | 0x5A<<7 | 0x1B, + 21168 - 19968: jis0212<<14 | 0x12<<7 | 0x3D, + 21169 - 19968: jis0208<<14 | 0x2D<<7 | 0x44, + 21172 - 19968: jis0208<<14 | 0x2E<<7 | 0x0A, + 21173 - 19968: jis0208<<14 | 0x31<<7 | 0x04, + 21174 - 19968: jis0212<<14 | 0x12<<7 | 0x3E, + 21175 - 19968: jis0212<<14 | 0x12<<7 | 0x3F, + 21176 - 19968: jis0212<<14 | 0x12<<7 | 0x40, + 21177 - 19968: jis0208<<14 | 0x17<<7 | 0x59, + 21178 - 19968: jis0212<<14 | 0x12<<7 | 0x41, + 21179 - 19968: jis0212<<14 | 0x12<<7 | 0x42, + 21180 - 19968: jis0208<<14 | 0x31<<7 | 0x03, + 21181 - 19968: jis0212<<14 | 0x12<<7 | 0x43, + 21182 - 19968: jis0208<<14 | 0x12<<7 | 0x0E, + 21184 - 19968: jis0208<<14 | 0x58<<7 | 0x2A, + 21185 - 19968: jis0208<<14 | 0x31<<7 | 0x05, + 21187 - 19968: jis0208<<14 | 0x2A<<7 | 0x35, + 21188 - 19968: jis0212<<14 | 0x12<<7 | 0x45, + 21189 - 19968: jis0208<<14 | 0x23<<7 | 0x1B, + 21190 - 19968: jis0212<<14 | 0x12<<7 | 0x46, + 21191 - 19968: jis0208<<14 | 0x2C<<7 | 0x05, + 21192 - 19968: jis0212<<14 | 0x12<<7 | 0x47, + 21193 - 19968: jis0208<<14 | 0x29<<7 | 0x38, + 21196 - 19968: jis0212<<14 | 0x12<<7 | 0x48, + 21197 - 19968: jis0208<<14 | 0x31<<7 | 0x06, + 21199 - 19968: jis0212<<14 | 0x12<<7 | 0x49, + 21201 - 19968: jis0212<<14 | 0x12<<7 | 0x4A, + 21202 - 19968: jis0208<<14 | 0x4F<<7 | 0x34, + 21204 - 19968: jis0212<<14 | 0x12<<7 | 0x4B, + 21205 - 19968: jis0208<<14 | 0x25<<7 | 0x0F, + 21206 - 19968: jis0212<<14 | 0x12<<7 | 0x4C, + 21207 - 19968: jis0208<<14 | 0x31<<7 | 0x07, + 21208 - 19968: jis0208<<14 | 0x13<<7 | 0x09, + 21209 - 19968: jis0208<<14 | 0x2B<<7 | 0x12, + 21211 - 19968: jis0208<<14 | 0x58<<7 | 0x2B, + 21212 - 19968: jis0212<<14 | 0x12<<7 | 0x4E, + 21213 - 19968: jis0208<<14 | 0x1D<<7 | 0x00, + 21214 - 19968: jis0208<<14 | 0x31<<7 | 0x08, + 21215 - 19968: jis0208<<14 | 0x29<<7 | 0x46, + 21216 - 19968: jis0208<<14 | 0x31<<7 | 0x0C, + 21217 - 19968: jis0212<<14 | 0x12<<7 | 0x4F, + 21218 - 19968: jis0208<<14 | 0x1F<<7 | 0x09, + 21219 - 19968: jis0208<<14 | 0x31<<7 | 0x09, + 21220 - 19968: jis0208<<14 | 0x15<<7 | 0x2F, + 21221 - 19968: jis0212<<14 | 0x12<<7 | 0x50, + 21222 - 19968: jis0208<<14 | 0x31<<7 | 0x0A, + 21223 - 19968: jis0208<<14 | 0x13<<7 | 0x0A, + 21224 - 19968: jis0212<<14 | 0x12<<7 | 0x51, + 21225 - 19968: jis0212<<14 | 0x12<<7 | 0x52, + 21226 - 19968: jis0212<<14 | 0x12<<7 | 0x53, + 21228 - 19968: jis0212<<14 | 0x12<<7 | 0x54, + 21232 - 19968: jis0212<<14 | 0x12<<7 | 0x55, + 21233 - 19968: jis0212<<14 | 0x12<<7 | 0x56, + 21234 - 19968: jis0208<<14 | 0x16<<7 | 0x0D, + 21235 - 19968: jis0208<<14 | 0x31<<7 | 0x0D, + 21236 - 19968: jis0212<<14 | 0x12<<7 | 0x57, + 21237 - 19968: jis0208<<14 | 0x31<<7 | 0x0E, + 21238 - 19968: jis0212<<14 | 0x12<<7 | 0x58, + 21239 - 19968: jis0212<<14 | 0x12<<7 | 0x59, + 21240 - 19968: jis0208<<14 | 0x31<<7 | 0x0F, + 21241 - 19968: jis0208<<14 | 0x31<<7 | 0x10, + 21242 - 19968: jis0208<<14 | 0x1B<<7 | 0x3A, + 21246 - 19968: jis0208<<14 | 0x17<<7 | 0x5A, + 21247 - 19968: jis0208<<14 | 0x2B<<7 | 0x3D, + 21248 - 19968: jis0208<<14 | 0x58<<7 | 0x2C, + 21249 - 19968: jis0208<<14 | 0x2B<<7 | 0x47, + 21250 - 19968: jis0208<<14 | 0x25<<7 | 0x56, + 21251 - 19968: jis0212<<14 | 0x12<<7 | 0x5B, + 21253 - 19968: jis0208<<14 | 0x29<<7 | 0x50, + 21254 - 19968: jis0208<<14 | 0x31<<7 | 0x11, + 21255 - 19968: jis0208<<14 | 0x58<<7 | 0x2D, + 21256 - 19968: jis0208<<14 | 0x31<<7 | 0x12, + 21258 - 19968: jis0212<<14 | 0x12<<7 | 0x5C, + 21259 - 19968: jis0212<<14 | 0x12<<7 | 0x5D, + 21260 - 19968: jis0212<<14 | 0x13<<7 | 0x00, + 21261 - 19968: jis0208<<14 | 0x31<<7 | 0x14, + 21263 - 19968: jis0208<<14 | 0x31<<7 | 0x16, + 21264 - 19968: jis0208<<14 | 0x31<<7 | 0x15, + 21265 - 19968: jis0212<<14 | 0x13<<7 | 0x01, + 21267 - 19968: jis0212<<14 | 0x13<<7 | 0x02, + 21269 - 19968: jis0208<<14 | 0x31<<7 | 0x17, + 21270 - 19968: jis0208<<14 | 0x11<<7 | 0x1C, + 21271 - 19968: jis0208<<14 | 0x2A<<7 | 0x2B, + 21272 - 19968: jis0212<<14 | 0x13<<7 | 0x03, + 21273 - 19968: jis0208<<14 | 0x19<<7 | 0x5B, + 21274 - 19968: jis0208<<14 | 0x31<<7 | 0x18, + 21275 - 19968: jis0212<<14 | 0x13<<7 | 0x04, + 21276 - 19968: jis0212<<14 | 0x13<<7 | 0x05, + 21277 - 19968: jis0208<<14 | 0x20<<7 | 0x38, + 21278 - 19968: jis0212<<14 | 0x13<<7 | 0x06, + 21279 - 19968: jis0212<<14 | 0x13<<7 | 0x07, + 21280 - 19968: jis0208<<14 | 0x1D<<7 | 0x01, + 21281 - 19968: jis0208<<14 | 0x15<<7 | 0x08, + 21283 - 19968: jis0208<<14 | 0x31<<7 | 0x19, + 21284 - 19968: jis0208<<14 | 0x58<<7 | 0x2E, + 21285 - 19968: jis0212<<14 | 0x13<<7 | 0x08, + 21287 - 19968: jis0212<<14 | 0x13<<7 | 0x09, + 21288 - 19968: jis0212<<14 | 0x13<<7 | 0x0A, + 21289 - 19968: jis0212<<14 | 0x13<<7 | 0x0B, + 21290 - 19968: jis0208<<14 | 0x27<<7 | 0x3A, + 21291 - 19968: jis0212<<14 | 0x13<<7 | 0x0C, + 21292 - 19968: jis0212<<14 | 0x13<<7 | 0x0D, + 21293 - 19968: jis0212<<14 | 0x13<<7 | 0x0E, + 21295 - 19968: jis0208<<14 | 0x31<<7 | 0x1A, + 21296 - 19968: jis0212<<14 | 0x13<<7 | 0x0F, + 21297 - 19968: jis0208<<14 | 0x31<<7 | 0x1B, + 21298 - 19968: jis0212<<14 | 0x13<<7 | 0x10, + 21299 - 19968: jis0208<<14 | 0x31<<7 | 0x1C, + 21301 - 19968: jis0212<<14 | 0x13<<7 | 0x11, + 21304 - 19968: jis0208<<14 | 0x31<<7 | 0x1D, + 21305 - 19968: jis0208<<14 | 0x28<<7 | 0x03, + 21306 - 19968: jis0208<<14 | 0x15<<7 | 0x47, + 21307 - 19968: jis0208<<14 | 0x0F<<7 | 0x44, + 21308 - 19968: jis0212<<14 | 0x13<<7 | 0x12, + 21309 - 19968: jis0212<<14 | 0x13<<7 | 0x13, + 21310 - 19968: jis0212<<14 | 0x13<<7 | 0x14, + 21311 - 19968: jis0208<<14 | 0x25<<7 | 0x1E, + 21312 - 19968: jis0208<<14 | 0x31<<7 | 0x1E, + 21313 - 19968: jis0208<<14 | 0x1C<<7 | 0x1C, + 21314 - 19968: jis0212<<14 | 0x13<<7 | 0x15, + 21315 - 19968: jis0208<<14 | 0x1F<<7 | 0x48, + 21317 - 19968: jis0208<<14 | 0x31<<7 | 0x20, + 21318 - 19968: jis0208<<14 | 0x31<<7 | 0x1F, + 21319 - 19968: jis0208<<14 | 0x1D<<7 | 0x02, + 21320 - 19968: jis0208<<14 | 0x17<<7 | 0x40, + 21321 - 19968: jis0208<<14 | 0x31<<7 | 0x22, + 21322 - 19968: jis0208<<14 | 0x27<<7 | 0x1D, + 21323 - 19968: jis0212<<14 | 0x13<<7 | 0x17, + 21324 - 19968: jis0212<<14 | 0x13<<7 | 0x16, + 21325 - 19968: jis0208<<14 | 0x31<<7 | 0x23, + 21329 - 19968: jis0208<<14 | 0x27<<7 | 0x3B, + 21330 - 19968: jis0208<<14 | 0x21<<7 | 0x13, + 21331 - 19968: jis0208<<14 | 0x21<<7 | 0x4D, + 21332 - 19968: jis0208<<14 | 0x15<<7 | 0x07, + 21335 - 19968: jis0208<<14 | 0x25<<7 | 0x4D, + 21336 - 19968: jis0208<<14 | 0x22<<7 | 0x10, + 21337 - 19968: jis0212<<14 | 0x13<<7 | 0x18, + 21338 - 19968: jis0208<<14 | 0x26<<7 | 0x4D, + 21339 - 19968: jis0212<<14 | 0x13<<7 | 0x19, + 21340 - 19968: jis0208<<14 | 0x2A<<7 | 0x2D, + 21342 - 19968: jis0208<<14 | 0x31<<7 | 0x25, + 21344 - 19968: jis0208<<14 | 0x1F<<7 | 0x49, + 21345 - 19968: jis0212<<14 | 0x13<<7 | 0x1A, + 21347 - 19968: jis0212<<14 | 0x13<<7 | 0x1B, + 21349 - 19968: jis0212<<14 | 0x13<<7 | 0x1C, + 21350 - 19968: jis0208<<14 | 0x16<<7 | 0x14, + 21353 - 19968: jis0208<<14 | 0x31<<7 | 0x26, + 21356 - 19968: jis0212<<14 | 0x13<<7 | 0x1D, + 21357 - 19968: jis0212<<14 | 0x13<<7 | 0x1E, + 21358 - 19968: jis0208<<14 | 0x31<<7 | 0x27, + 21359 - 19968: jis0208<<14 | 0x10<<7 | 0x0B, + 21360 - 19968: jis0208<<14 | 0x0F<<7 | 0x54, + 21361 - 19968: jis0208<<14 | 0x13<<7 | 0x4C, + 21362 - 19968: jis0208<<14 | 0x58<<7 | 0x2F, + 21363 - 19968: jis0208<<14 | 0x21<<7 | 0x07, + 21364 - 19968: jis0208<<14 | 0x14<<7 | 0x30, + 21365 - 19968: jis0208<<14 | 0x2C<<7 | 0x50, + 21367 - 19968: jis0208<<14 | 0x31<<7 | 0x2A, + 21368 - 19968: jis0208<<14 | 0x11<<7 | 0x16, + 21369 - 19968: jis0212<<14 | 0x13<<7 | 0x20, + 21371 - 19968: jis0208<<14 | 0x31<<7 | 0x29, + 21374 - 19968: jis0212<<14 | 0x13<<7 | 0x21, + 21375 - 19968: jis0208<<14 | 0x15<<7 | 0x09, + 21378 - 19968: jis0208<<14 | 0x31<<7 | 0x2B, + 21379 - 19968: jis0212<<14 | 0x13<<7 | 0x22, + 21380 - 19968: jis0208<<14 | 0x2B<<7 | 0x50, + 21383 - 19968: jis0212<<14 | 0x13<<7 | 0x23, + 21384 - 19968: jis0212<<14 | 0x13<<7 | 0x24, + 21390 - 19968: jis0212<<14 | 0x13<<7 | 0x25, + 21395 - 19968: jis0208<<14 | 0x58<<7 | 0x30, + 21396 - 19968: jis0212<<14 | 0x13<<7 | 0x27, + 21398 - 19968: jis0208<<14 | 0x31<<7 | 0x2C, + 21400 - 19968: jis0208<<14 | 0x2D<<7 | 0x31, + 21401 - 19968: jis0212<<14 | 0x13<<7 | 0x28, + 21402 - 19968: jis0208<<14 | 0x17<<7 | 0x5B, + 21405 - 19968: jis0212<<14 | 0x13<<7 | 0x29, + 21407 - 19968: jis0208<<14 | 0x17<<7 | 0x15, + 21408 - 19968: jis0208<<14 | 0x31<<7 | 0x2D, + 21409 - 19968: jis0212<<14 | 0x13<<7 | 0x2A, + 21412 - 19968: jis0212<<14 | 0x13<<7 | 0x2B, + 21413 - 19968: jis0208<<14 | 0x31<<7 | 0x2F, + 21414 - 19968: jis0208<<14 | 0x31<<7 | 0x2E, + 21416 - 19968: jis0208<<14 | 0x1E<<7 | 0x3E, + 21417 - 19968: jis0208<<14 | 0x10<<7 | 0x18, + 21418 - 19968: jis0212<<14 | 0x13<<7 | 0x2C, + 21419 - 19968: jis0212<<14 | 0x13<<7 | 0x2D, + 21421 - 19968: jis0208<<14 | 0x10<<7 | 0x3D, + 21422 - 19968: jis0208<<14 | 0x31<<7 | 0x30, + 21423 - 19968: jis0212<<14 | 0x13<<7 | 0x2E, + 21424 - 19968: jis0208<<14 | 0x31<<7 | 0x31, + 21426 - 19968: jis0208<<14 | 0x58<<7 | 0x31, + 21427 - 19968: jis0208<<14 | 0x17<<7 | 0x16, + 21428 - 19968: jis0212<<14 | 0x13<<7 | 0x30, + 21429 - 19968: jis0212<<14 | 0x13<<7 | 0x31, + 21430 - 19968: jis0208<<14 | 0x31<<7 | 0x32, + 21431 - 19968: jis0212<<14 | 0x13<<7 | 0x32, + 21432 - 19968: jis0212<<14 | 0x13<<7 | 0x33, + 21434 - 19968: jis0212<<14 | 0x13<<7 | 0x34, + 21435 - 19968: jis0208<<14 | 0x14<<7 | 0x4D, + 21437 - 19968: jis0212<<14 | 0x13<<7 | 0x35, + 21440 - 19968: jis0212<<14 | 0x13<<7 | 0x36, + 21442 - 19968: jis0208<<14 | 0x1A<<7 | 0x11, + 21443 - 19968: jis0208<<14 | 0x31<<7 | 0x33, + 21445 - 19968: jis0212<<14 | 0x13<<7 | 0x37, + 21448 - 19968: jis0208<<14 | 0x2A<<7 | 0x53, + 21449 - 19968: jis0208<<14 | 0x19<<7 | 0x14, + 21450 - 19968: jis0208<<14 | 0x14<<7 | 0x39, + 21451 - 19968: jis0208<<14 | 0x2C<<7 | 0x06, + 21452 - 19968: jis0208<<14 | 0x20<<7 | 0x2F, + 21453 - 19968: jis0208<<14 | 0x27<<7 | 0x1E, + 21454 - 19968: jis0208<<14 | 0x1B<<7 | 0x5C, + 21455 - 19968: jis0212<<14 | 0x13<<7 | 0x38, + 21458 - 19968: jis0212<<14 | 0x13<<7 | 0x39, + 21459 - 19968: jis0212<<14 | 0x13<<7 | 0x3A, + 21460 - 19968: jis0208<<14 | 0x1C<<7 | 0x26, + 21461 - 19968: jis0212<<14 | 0x13<<7 | 0x3B, + 21462 - 19968: jis0208<<14 | 0x1B<<7 | 0x47, + 21463 - 19968: jis0208<<14 | 0x1B<<7 | 0x54, + 21465 - 19968: jis0208<<14 | 0x1C<<7 | 0x55, + 21466 - 19968: jis0212<<14 | 0x13<<7 | 0x3C, + 21467 - 19968: jis0208<<14 | 0x27<<7 | 0x1F, + 21469 - 19968: jis0208<<14 | 0x58<<7 | 0x32, + 21470 - 19968: jis0212<<14 | 0x13<<7 | 0x3E, + 21471 - 19968: jis0208<<14 | 0x31<<7 | 0x36, + 21472 - 19968: jis0212<<14 | 0x13<<7 | 0x3F, + 21473 - 19968: jis0208<<14 | 0x10<<7 | 0x22, + 21474 - 19968: jis0208<<14 | 0x20<<7 | 0x30, + 21475 - 19968: jis0208<<14 | 0x17<<7 | 0x5C, + 21476 - 19968: jis0208<<14 | 0x17<<7 | 0x24, + 21477 - 19968: jis0208<<14 | 0x15<<7 | 0x46, + 21478 - 19968: jis0212<<14 | 0x13<<7 | 0x40, + 21479 - 19968: jis0212<<14 | 0x13<<7 | 0x41, + 21480 - 19968: jis0208<<14 | 0x31<<7 | 0x3A, + 21481 - 19968: jis0208<<14 | 0x22<<7 | 0x00, + 21482 - 19968: jis0208<<14 | 0x21<<7 | 0x5D, + 21483 - 19968: jis0208<<14 | 0x15<<7 | 0x0A, + 21484 - 19968: jis0208<<14 | 0x1D<<7 | 0x03, + 21485 - 19968: jis0208<<14 | 0x31<<7 | 0x3B, + 21486 - 19968: jis0208<<14 | 0x31<<7 | 0x39, + 21487 - 19968: jis0208<<14 | 0x11<<7 | 0x23, + 21488 - 19968: jis0208<<14 | 0x21<<7 | 0x45, + 21489 - 19968: jis0208<<14 | 0x1B<<7 | 0x17, + 21490 - 19968: jis0208<<14 | 0x1A<<7 | 0x2A, + 21491 - 19968: jis0208<<14 | 0x10<<7 | 0x05, + 21493 - 19968: jis0212<<14 | 0x13<<7 | 0x42, + 21494 - 19968: jis0208<<14 | 0x12<<7 | 0x4F, + 21495 - 19968: jis0208<<14 | 0x18<<7 | 0x45, + 21496 - 19968: jis0208<<14 | 0x1A<<7 | 0x29, + 21498 - 19968: jis0208<<14 | 0x31<<7 | 0x3C, + 21505 - 19968: jis0208<<14 | 0x31<<7 | 0x3D, + 21506 - 19968: jis0212<<14 | 0x13<<7 | 0x43, + 21507 - 19968: jis0208<<14 | 0x14<<7 | 0x28, + 21508 - 19968: jis0208<<14 | 0x12<<7 | 0x25, + 21512 - 19968: jis0208<<14 | 0x18<<7 | 0x46, + 21513 - 19968: jis0208<<14 | 0x14<<7 | 0x27, + 21514 - 19968: jis0208<<14 | 0x23<<7 | 0x3E, + 21515 - 19968: jis0208<<14 | 0x10<<7 | 0x04, + 21516 - 19968: jis0208<<14 | 0x25<<7 | 0x10, + 21517 - 19968: jis0208<<14 | 0x2B<<7 | 0x1D, + 21518 - 19968: jis0208<<14 | 0x18<<7 | 0x00, + 21519 - 19968: jis0208<<14 | 0x2C<<7 | 0x58, + 21520 - 19968: jis0208<<14 | 0x24<<7 | 0x26, + 21521 - 19968: jis0208<<14 | 0x17<<7 | 0x5D, + 21523 - 19968: jis0212<<14 | 0x13<<7 | 0x44, + 21530 - 19968: jis0212<<14 | 0x13<<7 | 0x45, + 21531 - 19968: jis0208<<14 | 0x16<<7 | 0x0E, + 21533 - 19968: jis0208<<14 | 0x31<<7 | 0x46, + 21535 - 19968: jis0208<<14 | 0x15<<7 | 0x42, + 21536 - 19968: jis0208<<14 | 0x2A<<7 | 0x29, + 21537 - 19968: jis0212<<14 | 0x13<<7 | 0x46, + 21542 - 19968: jis0208<<14 | 0x27<<7 | 0x3C, + 21543 - 19968: jis0212<<14 | 0x13<<7 | 0x47, + 21544 - 19968: jis0212<<14 | 0x13<<7 | 0x48, + 21545 - 19968: jis0208<<14 | 0x31<<7 | 0x45, + 21546 - 19968: jis0212<<14 | 0x13<<7 | 0x49, + 21547 - 19968: jis0208<<14 | 0x13<<7 | 0x3D, + 21548 - 19968: jis0208<<14 | 0x31<<7 | 0x40, + 21549 - 19968: jis0208<<14 | 0x31<<7 | 0x41, + 21550 - 19968: jis0208<<14 | 0x31<<7 | 0x43, + 21551 - 19968: jis0212<<14 | 0x13<<7 | 0x4A, + 21553 - 19968: jis0212<<14 | 0x13<<7 | 0x4B, + 21556 - 19968: jis0212<<14 | 0x13<<7 | 0x4C, + 21557 - 19968: jis0212<<14 | 0x13<<7 | 0x4D, + 21558 - 19968: jis0208<<14 | 0x31<<7 | 0x44, + 21560 - 19968: jis0208<<14 | 0x14<<7 | 0x3A, + 21561 - 19968: jis0208<<14 | 0x1E<<7 | 0x40, + 21563 - 19968: jis0208<<14 | 0x29<<7 | 0x0C, + 21564 - 19968: jis0208<<14 | 0x31<<7 | 0x42, + 21565 - 19968: jis0208<<14 | 0x31<<7 | 0x3E, + 21566 - 19968: jis0208<<14 | 0x17<<7 | 0x42, + 21568 - 19968: jis0208<<14 | 0x31<<7 | 0x3F, + 21570 - 19968: jis0208<<14 | 0x2E<<7 | 0x03, + 21571 - 19968: jis0212<<14 | 0x13<<7 | 0x4E, + 21572 - 19968: jis0212<<14 | 0x13<<7 | 0x4F, + 21574 - 19968: jis0208<<14 | 0x29<<7 | 0x51, + 21575 - 19968: jis0212<<14 | 0x13<<7 | 0x50, + 21576 - 19968: jis0208<<14 | 0x23<<7 | 0x47, + 21577 - 19968: jis0208<<14 | 0x17<<7 | 0x41, + 21578 - 19968: jis0208<<14 | 0x18<<7 | 0x4F, + 21581 - 19968: jis0212<<14 | 0x13<<7 | 0x51, + 21582 - 19968: jis0208<<14 | 0x31<<7 | 0x47, + 21583 - 19968: jis0212<<14 | 0x13<<7 | 0x52, + 21585 - 19968: jis0208<<14 | 0x25<<7 | 0x3C, + 21598 - 19968: jis0212<<14 | 0x13<<7 | 0x53, + 21599 - 19968: jis0208<<14 | 0x31<<7 | 0x4B, + 21602 - 19968: jis0212<<14 | 0x13<<7 | 0x54, + 21604 - 19968: jis0212<<14 | 0x13<<7 | 0x55, + 21606 - 19968: jis0212<<14 | 0x13<<7 | 0x56, + 21607 - 19968: jis0212<<14 | 0x13<<7 | 0x57, + 21608 - 19968: jis0208<<14 | 0x1B<<7 | 0x5D, + 21609 - 19968: jis0212<<14 | 0x13<<7 | 0x58, + 21610 - 19968: jis0208<<14 | 0x1B<<7 | 0x55, + 21611 - 19968: jis0212<<14 | 0x13<<7 | 0x59, + 21613 - 19968: jis0212<<14 | 0x13<<7 | 0x5A, + 21614 - 19968: jis0212<<14 | 0x13<<7 | 0x5B, + 21616 - 19968: jis0208<<14 | 0x31<<7 | 0x4E, + 21617 - 19968: jis0208<<14 | 0x31<<7 | 0x4C, + 21619 - 19968: jis0208<<14 | 0x2B<<7 | 0x02, + 21620 - 19968: jis0212<<14 | 0x13<<7 | 0x5C, + 21621 - 19968: jis0208<<14 | 0x31<<7 | 0x49, + 21622 - 19968: jis0208<<14 | 0x31<<7 | 0x52, + 21623 - 19968: jis0208<<14 | 0x31<<7 | 0x4D, + 21627 - 19968: jis0208<<14 | 0x31<<7 | 0x50, + 21628 - 19968: jis0208<<14 | 0x17<<7 | 0x25, + 21629 - 19968: jis0208<<14 | 0x2B<<7 | 0x1E, + 21631 - 19968: jis0212<<14 | 0x13<<7 | 0x5D, + 21632 - 19968: jis0208<<14 | 0x31<<7 | 0x51, + 21633 - 19968: jis0212<<14 | 0x14<<7 | 0x00, + 21635 - 19968: jis0212<<14 | 0x14<<7 | 0x01, + 21636 - 19968: jis0208<<14 | 0x31<<7 | 0x53, + 21637 - 19968: jis0212<<14 | 0x14<<7 | 0x02, + 21638 - 19968: jis0208<<14 | 0x31<<7 | 0x55, + 21640 - 19968: jis0212<<14 | 0x14<<7 | 0x03, + 21641 - 19968: jis0212<<14 | 0x14<<7 | 0x04, + 21642 - 19968: jis0208<<14 | 0x58<<7 | 0x35, + 21643 - 19968: jis0208<<14 | 0x19<<7 | 0x4F, + 21644 - 19968: jis0208<<14 | 0x2E<<7 | 0x21, + 21645 - 19968: jis0212<<14 | 0x14<<7 | 0x05, + 21646 - 19968: jis0208<<14 | 0x31<<7 | 0x4A, + 21647 - 19968: jis0208<<14 | 0x31<<7 | 0x48, + 21648 - 19968: jis0208<<14 | 0x31<<7 | 0x54, + 21649 - 19968: jis0212<<14 | 0x14<<7 | 0x06, + 21650 - 19968: jis0208<<14 | 0x31<<7 | 0x4F, + 21653 - 19968: jis0212<<14 | 0x14<<7 | 0x07, + 21654 - 19968: jis0212<<14 | 0x14<<7 | 0x08, + 21660 - 19968: jis0208<<14 | 0x58<<7 | 0x34, + 21663 - 19968: jis0212<<14 | 0x14<<7 | 0x0A, + 21665 - 19968: jis0212<<14 | 0x14<<7 | 0x0B, + 21666 - 19968: jis0208<<14 | 0x31<<7 | 0x57, + 21668 - 19968: jis0208<<14 | 0x32<<7 | 0x02, + 21669 - 19968: jis0208<<14 | 0x31<<7 | 0x59, + 21670 - 19968: jis0212<<14 | 0x14<<7 | 0x0C, + 21671 - 19968: jis0212<<14 | 0x14<<7 | 0x0D, + 21672 - 19968: jis0208<<14 | 0x31<<7 | 0x5D, + 21673 - 19968: jis0208<<14 | 0x58<<7 | 0x36, + 21674 - 19968: jis0212<<14 | 0x14<<7 | 0x0F, + 21675 - 19968: jis0208<<14 | 0x32<<7 | 0x00, + 21676 - 19968: jis0208<<14 | 0x31<<7 | 0x5A, + 21677 - 19968: jis0212<<14 | 0x14<<7 | 0x10, + 21678 - 19968: jis0212<<14 | 0x14<<7 | 0x11, + 21679 - 19968: jis0208<<14 | 0x32<<7 | 0x1D, + 21681 - 19968: jis0212<<14 | 0x14<<7 | 0x12, + 21682 - 19968: jis0208<<14 | 0x19<<7 | 0x48, + 21683 - 19968: jis0208<<14 | 0x12<<7 | 0x10, + 21687 - 19968: jis0212<<14 | 0x14<<7 | 0x13, + 21688 - 19968: jis0208<<14 | 0x31<<7 | 0x58, + 21689 - 19968: jis0212<<14 | 0x14<<7 | 0x14, + 21690 - 19968: jis0212<<14 | 0x14<<7 | 0x15, + 21691 - 19968: jis0212<<14 | 0x14<<7 | 0x16, + 21692 - 19968: jis0208<<14 | 0x32<<7 | 0x04, + 21693 - 19968: jis0208<<14 | 0x0F<<7 | 0x55, + 21694 - 19968: jis0208<<14 | 0x32<<7 | 0x03, + 21695 - 19968: jis0212<<14 | 0x14<<7 | 0x17, + 21696 - 19968: jis0208<<14 | 0x0F<<7 | 0x04, + 21697 - 19968: jis0208<<14 | 0x28<<7 | 0x29, + 21698 - 19968: jis0208<<14 | 0x32<<7 | 0x01, + 21700 - 19968: jis0208<<14 | 0x31<<7 | 0x5B, + 21702 - 19968: jis0212<<14 | 0x14<<7 | 0x18, + 21703 - 19968: jis0208<<14 | 0x31<<7 | 0x56, + 21704 - 19968: jis0208<<14 | 0x31<<7 | 0x5C, + 21705 - 19968: jis0208<<14 | 0x19<<7 | 0x27, + 21706 - 19968: jis0212<<14 | 0x14<<7 | 0x19, + 21709 - 19968: jis0212<<14 | 0x14<<7 | 0x1A, + 21710 - 19968: jis0212<<14 | 0x14<<7 | 0x1B, + 21720 - 19968: jis0208<<14 | 0x32<<7 | 0x05, + 21728 - 19968: jis0212<<14 | 0x14<<7 | 0x1C, + 21729 - 19968: jis0208<<14 | 0x0F<<7 | 0x56, + 21730 - 19968: jis0208<<14 | 0x32<<7 | 0x0E, + 21733 - 19968: jis0208<<14 | 0x32<<7 | 0x06, + 21734 - 19968: jis0208<<14 | 0x32<<7 | 0x07, + 21736 - 19968: jis0208<<14 | 0x1D<<7 | 0x04, + 21737 - 19968: jis0208<<14 | 0x2A<<7 | 0x48, + 21738 - 19968: jis0212<<14 | 0x14<<7 | 0x1D, + 21740 - 19968: jis0212<<14 | 0x14<<7 | 0x1E, + 21741 - 19968: jis0208<<14 | 0x32<<7 | 0x0C, + 21742 - 19968: jis0208<<14 | 0x32<<7 | 0x0B, + 21743 - 19968: jis0212<<14 | 0x14<<7 | 0x1F, + 21746 - 19968: jis0208<<14 | 0x24<<7 | 0x0E, + 21750 - 19968: jis0212<<14 | 0x14<<7 | 0x20, + 21754 - 19968: jis0208<<14 | 0x32<<7 | 0x0D, + 21756 - 19968: jis0212<<14 | 0x14<<7 | 0x21, + 21757 - 19968: jis0208<<14 | 0x32<<7 | 0x0A, + 21758 - 19968: jis0212<<14 | 0x14<<7 | 0x22, + 21759 - 19968: jis0208<<14 | 0x58<<7 | 0x37, + 21760 - 19968: jis0212<<14 | 0x14<<7 | 0x24, + 21761 - 19968: jis0212<<14 | 0x14<<7 | 0x25, + 21764 - 19968: jis0208<<14 | 0x10<<7 | 0x13, + 21765 - 19968: jis0212<<14 | 0x14<<7 | 0x26, + 21766 - 19968: jis0208<<14 | 0x19<<7 | 0x15, + 21767 - 19968: jis0208<<14 | 0x1E<<7 | 0x0F, + 21768 - 19968: jis0212<<14 | 0x14<<7 | 0x27, + 21769 - 19968: jis0212<<14 | 0x14<<7 | 0x28, + 21772 - 19968: jis0212<<14 | 0x14<<7 | 0x29, + 21773 - 19968: jis0212<<14 | 0x14<<7 | 0x2A, + 21774 - 19968: jis0212<<14 | 0x14<<7 | 0x2B, + 21775 - 19968: jis0208<<14 | 0x32<<7 | 0x08, + 21776 - 19968: jis0208<<14 | 0x24<<7 | 0x41, + 21780 - 19968: jis0208<<14 | 0x32<<7 | 0x09, + 21781 - 19968: jis0212<<14 | 0x14<<7 | 0x2C, + 21782 - 19968: jis0208<<14 | 0x0F<<7 | 0x01, + 21802 - 19968: jis0212<<14 | 0x14<<7 | 0x2D, + 21803 - 19968: jis0212<<14 | 0x14<<7 | 0x2E, + 21806 - 19968: jis0208<<14 | 0x32<<7 | 0x13, + 21807 - 19968: jis0208<<14 | 0x2C<<7 | 0x02, + 21809 - 19968: jis0208<<14 | 0x1D<<7 | 0x06, + 21810 - 19968: jis0212<<14 | 0x14<<7 | 0x2F, + 21811 - 19968: jis0208<<14 | 0x32<<7 | 0x19, + 21813 - 19968: jis0212<<14 | 0x14<<7 | 0x30, + 21814 - 19968: jis0212<<14 | 0x14<<7 | 0x31, + 21816 - 19968: jis0208<<14 | 0x32<<7 | 0x18, + 21817 - 19968: jis0208<<14 | 0x32<<7 | 0x0F, + 21819 - 19968: jis0212<<14 | 0x14<<7 | 0x32, + 21820 - 19968: jis0212<<14 | 0x14<<7 | 0x33, + 21821 - 19968: jis0212<<14 | 0x14<<7 | 0x34, + 21822 - 19968: jis0208<<14 | 0x21<<7 | 0x22, + 21824 - 19968: jis0208<<14 | 0x32<<7 | 0x10, + 21825 - 19968: jis0212<<14 | 0x14<<7 | 0x35, + 21828 - 19968: jis0208<<14 | 0x21<<7 | 0x4E, + 21829 - 19968: jis0208<<14 | 0x32<<7 | 0x15, + 21830 - 19968: jis0208<<14 | 0x1D<<7 | 0x05, + 21831 - 19968: jis0212<<14 | 0x14<<7 | 0x36, + 21833 - 19968: jis0212<<14 | 0x14<<7 | 0x37, + 21834 - 19968: jis0212<<14 | 0x14<<7 | 0x38, + 21836 - 19968: jis0208<<14 | 0x32<<7 | 0x12, + 21837 - 19968: jis0212<<14 | 0x14<<7 | 0x39, + 21839 - 19968: jis0208<<14 | 0x2B<<7 | 0x43, + 21840 - 19968: jis0212<<14 | 0x14<<7 | 0x3A, + 21841 - 19968: jis0212<<14 | 0x14<<7 | 0x3B, + 21843 - 19968: jis0208<<14 | 0x16<<7 | 0x1B, + 21846 - 19968: jis0208<<14 | 0x32<<7 | 0x16, + 21847 - 19968: jis0208<<14 | 0x32<<7 | 0x17, + 21848 - 19968: jis0212<<14 | 0x14<<7 | 0x3C, + 21850 - 19968: jis0212<<14 | 0x14<<7 | 0x3D, + 21851 - 19968: jis0212<<14 | 0x14<<7 | 0x3E, + 21852 - 19968: jis0208<<14 | 0x32<<7 | 0x14, + 21853 - 19968: jis0208<<14 | 0x32<<7 | 0x1A, + 21854 - 19968: jis0212<<14 | 0x14<<7 | 0x3F, + 21856 - 19968: jis0212<<14 | 0x14<<7 | 0x40, + 21857 - 19968: jis0212<<14 | 0x14<<7 | 0x41, + 21859 - 19968: jis0208<<14 | 0x32<<7 | 0x11, + 21860 - 19968: jis0212<<14 | 0x14<<7 | 0x42, + 21862 - 19968: jis0212<<14 | 0x14<<7 | 0x43, + 21883 - 19968: jis0208<<14 | 0x32<<7 | 0x20, + 21884 - 19968: jis0208<<14 | 0x32<<7 | 0x25, + 21886 - 19968: jis0208<<14 | 0x32<<7 | 0x21, + 21887 - 19968: jis0212<<14 | 0x14<<7 | 0x44, + 21888 - 19968: jis0208<<14 | 0x32<<7 | 0x1C, + 21889 - 19968: jis0212<<14 | 0x14<<7 | 0x45, + 21890 - 19968: jis0212<<14 | 0x14<<7 | 0x46, + 21891 - 19968: jis0208<<14 | 0x32<<7 | 0x26, + 21892 - 19968: jis0208<<14 | 0x20<<7 | 0x10, + 21894 - 19968: jis0208<<14 | 0x58<<7 | 0x38, + 21895 - 19968: jis0208<<14 | 0x32<<7 | 0x28, + 21896 - 19968: jis0212<<14 | 0x14<<7 | 0x48, + 21897 - 19968: jis0208<<14 | 0x18<<7 | 0x01, + 21898 - 19968: jis0208<<14 | 0x32<<7 | 0x1E, + 21899 - 19968: jis0208<<14 | 0x22<<7 | 0x5C, + 21902 - 19968: jis0212<<14 | 0x14<<7 | 0x49, + 21903 - 19968: jis0212<<14 | 0x14<<7 | 0x4A, + 21905 - 19968: jis0212<<14 | 0x14<<7 | 0x4B, + 21906 - 19968: jis0212<<14 | 0x14<<7 | 0x4C, + 21907 - 19968: jis0212<<14 | 0x14<<7 | 0x4D, + 21908 - 19968: jis0212<<14 | 0x14<<7 | 0x4E, + 21911 - 19968: jis0212<<14 | 0x14<<7 | 0x4F, + 21912 - 19968: jis0208<<14 | 0x32<<7 | 0x22, + 21913 - 19968: jis0208<<14 | 0x32<<7 | 0x1B, + 21914 - 19968: jis0208<<14 | 0x13<<7 | 0x0C, + 21916 - 19968: jis0208<<14 | 0x13<<7 | 0x4D, + 21917 - 19968: jis0208<<14 | 0x12<<7 | 0x44, + 21918 - 19968: jis0208<<14 | 0x32<<7 | 0x23, + 21919 - 19968: jis0208<<14 | 0x32<<7 | 0x1F, + 21923 - 19968: jis0212<<14 | 0x14<<7 | 0x50, + 21924 - 19968: jis0212<<14 | 0x14<<7 | 0x51, + 21927 - 19968: jis0208<<14 | 0x16<<7 | 0x55, + 21928 - 19968: jis0208<<14 | 0x32<<7 | 0x29, + 21929 - 19968: jis0208<<14 | 0x32<<7 | 0x27, + 21930 - 19968: jis0208<<14 | 0x20<<7 | 0x32, + 21931 - 19968: jis0208<<14 | 0x14<<7 | 0x29, + 21932 - 19968: jis0208<<14 | 0x15<<7 | 0x0B, + 21933 - 19968: jis0212<<14 | 0x14<<7 | 0x52, + 21934 - 19968: jis0208<<14 | 0x32<<7 | 0x24, + 21936 - 19968: jis0208<<14 | 0x15<<7 | 0x53, + 21938 - 19968: jis0212<<14 | 0x14<<7 | 0x53, + 21942 - 19968: jis0208<<14 | 0x10<<7 | 0x23, + 21951 - 19968: jis0212<<14 | 0x14<<7 | 0x54, + 21953 - 19968: jis0212<<14 | 0x14<<7 | 0x55, + 21955 - 19968: jis0212<<14 | 0x14<<7 | 0x56, + 21956 - 19968: jis0208<<14 | 0x32<<7 | 0x2D, + 21957 - 19968: jis0208<<14 | 0x32<<7 | 0x2B, + 21958 - 19968: jis0212<<14 | 0x14<<7 | 0x57, + 21959 - 19968: jis0208<<14 | 0x33<<7 | 0x06, + 21961 - 19968: jis0212<<14 | 0x14<<7 | 0x58, + 21963 - 19968: jis0212<<14 | 0x14<<7 | 0x59, + 21964 - 19968: jis0212<<14 | 0x14<<7 | 0x5A, + 21966 - 19968: jis0212<<14 | 0x14<<7 | 0x5B, + 21969 - 19968: jis0212<<14 | 0x14<<7 | 0x5C, + 21970 - 19968: jis0212<<14 | 0x14<<7 | 0x5D, + 21971 - 19968: jis0212<<14 | 0x15<<7 | 0x00, + 21972 - 19968: jis0208<<14 | 0x32<<7 | 0x30, + 21975 - 19968: jis0212<<14 | 0x15<<7 | 0x01, + 21976 - 19968: jis0212<<14 | 0x15<<7 | 0x02, + 21978 - 19968: jis0208<<14 | 0x32<<7 | 0x2A, + 21979 - 19968: jis0212<<14 | 0x15<<7 | 0x03, + 21980 - 19968: jis0208<<14 | 0x32<<7 | 0x2E, + 21982 - 19968: jis0212<<14 | 0x15<<7 | 0x04, + 21983 - 19968: jis0208<<14 | 0x32<<7 | 0x2C, + 21986 - 19968: jis0212<<14 | 0x15<<7 | 0x05, + 21987 - 19968: jis0208<<14 | 0x1A<<7 | 0x2B, + 21988 - 19968: jis0208<<14 | 0x32<<7 | 0x2F, + 21993 - 19968: jis0212<<14 | 0x15<<7 | 0x06, + 22006 - 19968: jis0212<<14 | 0x15<<7 | 0x07, + 22007 - 19968: jis0208<<14 | 0x32<<7 | 0x32, + 22009 - 19968: jis0208<<14 | 0x32<<7 | 0x37, + 22013 - 19968: jis0208<<14 | 0x32<<7 | 0x35, + 22014 - 19968: jis0208<<14 | 0x32<<7 | 0x34, + 22015 - 19968: jis0212<<14 | 0x15<<7 | 0x08, + 22021 - 19968: jis0212<<14 | 0x15<<7 | 0x09, + 22022 - 19968: jis0208<<14 | 0x22<<7 | 0x11, + 22024 - 19968: jis0212<<14 | 0x15<<7 | 0x0A, + 22025 - 19968: jis0208<<14 | 0x11<<7 | 0x24, + 22026 - 19968: jis0212<<14 | 0x15<<7 | 0x0B, + 22029 - 19968: jis0212<<14 | 0x15<<7 | 0x0C, + 22030 - 19968: jis0212<<14 | 0x15<<7 | 0x0D, + 22031 - 19968: jis0212<<14 | 0x15<<7 | 0x0E, + 22032 - 19968: jis0212<<14 | 0x15<<7 | 0x0F, + 22033 - 19968: jis0212<<14 | 0x15<<7 | 0x10, + 22034 - 19968: jis0212<<14 | 0x15<<7 | 0x11, + 22036 - 19968: jis0208<<14 | 0x32<<7 | 0x31, + 22038 - 19968: jis0208<<14 | 0x32<<7 | 0x33, + 22039 - 19968: jis0208<<14 | 0x1D<<7 | 0x07, + 22040 - 19968: jis0208<<14 | 0x10<<7 | 0x12, + 22041 - 19968: jis0212<<14 | 0x15<<7 | 0x12, + 22043 - 19968: jis0208<<14 | 0x32<<7 | 0x36, + 22057 - 19968: jis0208<<14 | 0x11<<7 | 0x3D, + 22060 - 19968: jis0212<<14 | 0x15<<7 | 0x13, + 22063 - 19968: jis0208<<14 | 0x32<<7 | 0x41, + 22064 - 19968: jis0212<<14 | 0x15<<7 | 0x14, + 22065 - 19968: jis0208<<14 | 0x1D<<7 | 0x5B, + 22066 - 19968: jis0208<<14 | 0x32<<7 | 0x3D, + 22067 - 19968: jis0212<<14 | 0x15<<7 | 0x15, + 22068 - 19968: jis0208<<14 | 0x32<<7 | 0x3B, + 22069 - 19968: jis0212<<14 | 0x15<<7 | 0x16, + 22070 - 19968: jis0208<<14 | 0x32<<7 | 0x3C, + 22071 - 19968: jis0212<<14 | 0x15<<7 | 0x17, + 22072 - 19968: jis0208<<14 | 0x32<<7 | 0x3E, + 22073 - 19968: jis0212<<14 | 0x15<<7 | 0x18, + 22075 - 19968: jis0212<<14 | 0x15<<7 | 0x19, + 22076 - 19968: jis0212<<14 | 0x15<<7 | 0x1A, + 22077 - 19968: jis0212<<14 | 0x15<<7 | 0x1B, + 22079 - 19968: jis0212<<14 | 0x15<<7 | 0x1C, + 22080 - 19968: jis0212<<14 | 0x15<<7 | 0x1D, + 22081 - 19968: jis0212<<14 | 0x15<<7 | 0x1E, + 22082 - 19968: jis0208<<14 | 0x10<<7 | 0x1C, + 22083 - 19968: jis0212<<14 | 0x15<<7 | 0x1F, + 22084 - 19968: jis0212<<14 | 0x15<<7 | 0x20, + 22086 - 19968: jis0212<<14 | 0x15<<7 | 0x21, + 22089 - 19968: jis0212<<14 | 0x15<<7 | 0x22, + 22091 - 19968: jis0212<<14 | 0x15<<7 | 0x23, + 22092 - 19968: jis0208<<14 | 0x20<<7 | 0x18, + 22093 - 19968: jis0212<<14 | 0x15<<7 | 0x24, + 22094 - 19968: jis0208<<14 | 0x32<<7 | 0x38, + 22095 - 19968: jis0212<<14 | 0x15<<7 | 0x25, + 22096 - 19968: jis0208<<14 | 0x32<<7 | 0x39, + 22100 - 19968: jis0212<<14 | 0x15<<7 | 0x26, + 22107 - 19968: jis0208<<14 | 0x12<<7 | 0x59, + 22110 - 19968: jis0212<<14 | 0x15<<7 | 0x27, + 22112 - 19968: jis0212<<14 | 0x15<<7 | 0x28, + 22113 - 19968: jis0212<<14 | 0x15<<7 | 0x29, + 22114 - 19968: jis0212<<14 | 0x15<<7 | 0x2A, + 22115 - 19968: jis0212<<14 | 0x15<<7 | 0x2B, + 22116 - 19968: jis0208<<14 | 0x32<<7 | 0x40, + 22118 - 19968: jis0212<<14 | 0x15<<7 | 0x2C, + 22120 - 19968: jis0208<<14 | 0x13<<7 | 0x4E, + 22121 - 19968: jis0212<<14 | 0x15<<7 | 0x2D, + 22122 - 19968: jis0208<<14 | 0x32<<7 | 0x43, + 22123 - 19968: jis0208<<14 | 0x32<<7 | 0x3F, + 22124 - 19968: jis0208<<14 | 0x32<<7 | 0x42, + 22125 - 19968: jis0212<<14 | 0x15<<7 | 0x2E, + 22127 - 19968: jis0212<<14 | 0x15<<7 | 0x2F, + 22129 - 19968: jis0212<<14 | 0x15<<7 | 0x30, + 22130 - 19968: jis0212<<14 | 0x15<<7 | 0x31, + 22132 - 19968: jis0208<<14 | 0x29<<7 | 0x0D, + 22133 - 19968: jis0212<<14 | 0x15<<7 | 0x32, + 22136 - 19968: jis0208<<14 | 0x25<<7 | 0x34, + 22138 - 19968: jis0208<<14 | 0x27<<7 | 0x17, + 22144 - 19968: jis0208<<14 | 0x32<<7 | 0x45, + 22148 - 19968: jis0212<<14 | 0x15<<7 | 0x33, + 22149 - 19968: jis0212<<14 | 0x15<<7 | 0x34, + 22150 - 19968: jis0208<<14 | 0x32<<7 | 0x44, + 22151 - 19968: jis0208<<14 | 0x12<<7 | 0x24, + 22152 - 19968: jis0212<<14 | 0x15<<7 | 0x35, + 22154 - 19968: jis0208<<14 | 0x32<<7 | 0x46, + 22155 - 19968: jis0212<<14 | 0x15<<7 | 0x36, + 22156 - 19968: jis0212<<14 | 0x15<<7 | 0x37, + 22159 - 19968: jis0208<<14 | 0x32<<7 | 0x49, + 22164 - 19968: jis0208<<14 | 0x32<<7 | 0x48, + 22165 - 19968: jis0212<<14 | 0x15<<7 | 0x38, + 22169 - 19968: jis0212<<14 | 0x15<<7 | 0x39, + 22170 - 19968: jis0212<<14 | 0x15<<7 | 0x3A, + 22173 - 19968: jis0212<<14 | 0x15<<7 | 0x3B, + 22174 - 19968: jis0212<<14 | 0x15<<7 | 0x3C, + 22175 - 19968: jis0212<<14 | 0x15<<7 | 0x3D, + 22176 - 19968: jis0208<<14 | 0x32<<7 | 0x47, + 22178 - 19968: jis0208<<14 | 0x26<<7 | 0x18, + 22181 - 19968: jis0208<<14 | 0x32<<7 | 0x4A, + 22182 - 19968: jis0212<<14 | 0x15<<7 | 0x3E, + 22183 - 19968: jis0212<<14 | 0x15<<7 | 0x3F, + 22184 - 19968: jis0212<<14 | 0x15<<7 | 0x40, + 22185 - 19968: jis0212<<14 | 0x15<<7 | 0x41, + 22187 - 19968: jis0212<<14 | 0x15<<7 | 0x42, + 22188 - 19968: jis0212<<14 | 0x15<<7 | 0x43, + 22189 - 19968: jis0212<<14 | 0x15<<7 | 0x44, + 22190 - 19968: jis0208<<14 | 0x32<<7 | 0x4B, + 22193 - 19968: jis0212<<14 | 0x15<<7 | 0x45, + 22195 - 19968: jis0212<<14 | 0x15<<7 | 0x46, + 22196 - 19968: jis0208<<14 | 0x32<<7 | 0x4D, + 22198 - 19968: jis0208<<14 | 0x32<<7 | 0x4C, + 22199 - 19968: jis0212<<14 | 0x15<<7 | 0x47, + 22204 - 19968: jis0208<<14 | 0x32<<7 | 0x4F, + 22206 - 19968: jis0212<<14 | 0x15<<7 | 0x48, + 22208 - 19968: jis0208<<14 | 0x32<<7 | 0x52, + 22209 - 19968: jis0208<<14 | 0x32<<7 | 0x50, + 22210 - 19968: jis0208<<14 | 0x32<<7 | 0x4E, + 22211 - 19968: jis0208<<14 | 0x32<<7 | 0x51, + 22213 - 19968: jis0212<<14 | 0x15<<7 | 0x49, + 22216 - 19968: jis0208<<14 | 0x32<<7 | 0x53, + 22217 - 19968: jis0212<<14 | 0x15<<7 | 0x4A, + 22218 - 19968: jis0212<<14 | 0x15<<7 | 0x4B, + 22219 - 19968: jis0212<<14 | 0x15<<7 | 0x4C, + 22220 - 19968: jis0212<<14 | 0x15<<7 | 0x4F, + 22221 - 19968: jis0212<<14 | 0x15<<7 | 0x50, + 22222 - 19968: jis0208<<14 | 0x32<<7 | 0x54, + 22223 - 19968: jis0212<<14 | 0x15<<7 | 0x4D, + 22224 - 19968: jis0212<<14 | 0x15<<7 | 0x4E, + 22225 - 19968: jis0208<<14 | 0x32<<7 | 0x55, + 22227 - 19968: jis0208<<14 | 0x32<<7 | 0x56, + 22231 - 19968: jis0208<<14 | 0x32<<7 | 0x57, + 22232 - 19968: jis0208<<14 | 0x30<<7 | 0x24, + 22233 - 19968: jis0212<<14 | 0x15<<7 | 0x51, + 22234 - 19968: jis0208<<14 | 0x1B<<7 | 0x5B, + 22235 - 19968: jis0208<<14 | 0x1A<<7 | 0x2C, + 22236 - 19968: jis0212<<14 | 0x15<<7 | 0x52, + 22237 - 19968: jis0212<<14 | 0x15<<7 | 0x53, + 22238 - 19968: jis0208<<14 | 0x11<<7 | 0x52, + 22239 - 19968: jis0212<<14 | 0x15<<7 | 0x54, + 22240 - 19968: jis0208<<14 | 0x0F<<7 | 0x57, + 22241 - 19968: jis0212<<14 | 0x15<<7 | 0x55, + 22243 - 19968: jis0208<<14 | 0x22<<7 | 0x23, + 22244 - 19968: jis0212<<14 | 0x15<<7 | 0x56, + 22245 - 19968: jis0212<<14 | 0x15<<7 | 0x57, + 22246 - 19968: jis0212<<14 | 0x15<<7 | 0x58, + 22247 - 19968: jis0212<<14 | 0x15<<7 | 0x59, + 22248 - 19968: jis0212<<14 | 0x15<<7 | 0x5A, + 22251 - 19968: jis0212<<14 | 0x15<<7 | 0x5C, + 22253 - 19968: jis0212<<14 | 0x15<<7 | 0x5D, + 22254 - 19968: jis0208<<14 | 0x32<<7 | 0x58, + 22256 - 19968: jis0208<<14 | 0x19<<7 | 0x03, + 22257 - 19968: jis0212<<14 | 0x15<<7 | 0x5B, + 22258 - 19968: jis0208<<14 | 0x0F<<7 | 0x2E, + 22259 - 19968: jis0208<<14 | 0x1E<<7 | 0x3D, + 22262 - 19968: jis0212<<14 | 0x16<<7 | 0x00, + 22263 - 19968: jis0212<<14 | 0x16<<7 | 0x01, + 22265 - 19968: jis0208<<14 | 0x32<<7 | 0x59, + 22266 - 19968: jis0208<<14 | 0x17<<7 | 0x26, + 22269 - 19968: jis0208<<14 | 0x18<<7 | 0x50, + 22271 - 19968: jis0208<<14 | 0x32<<7 | 0x5B, + 22272 - 19968: jis0208<<14 | 0x32<<7 | 0x5A, + 22273 - 19968: jis0212<<14 | 0x16<<7 | 0x02, + 22274 - 19968: jis0212<<14 | 0x16<<7 | 0x03, + 22275 - 19968: jis0208<<14 | 0x29<<7 | 0x3F, + 22276 - 19968: jis0208<<14 | 0x32<<7 | 0x5C, + 22279 - 19968: jis0212<<14 | 0x16<<7 | 0x04, + 22280 - 19968: jis0208<<14 | 0x33<<7 | 0x00, + 22281 - 19968: jis0208<<14 | 0x32<<7 | 0x5D, + 22282 - 19968: jis0212<<14 | 0x16<<7 | 0x05, + 22283 - 19968: jis0208<<14 | 0x33<<7 | 0x01, + 22284 - 19968: jis0212<<14 | 0x16<<7 | 0x06, + 22285 - 19968: jis0208<<14 | 0x33<<7 | 0x02, + 22287 - 19968: jis0208<<14 | 0x16<<7 | 0x56, + 22289 - 19968: jis0212<<14 | 0x16<<7 | 0x07, + 22290 - 19968: jis0208<<14 | 0x10<<7 | 0x3F, + 22291 - 19968: jis0208<<14 | 0x33<<7 | 0x03, + 22293 - 19968: jis0212<<14 | 0x16<<7 | 0x08, + 22294 - 19968: jis0208<<14 | 0x33<<7 | 0x05, + 22296 - 19968: jis0208<<14 | 0x33<<7 | 0x04, + 22298 - 19968: jis0212<<14 | 0x16<<7 | 0x09, + 22299 - 19968: jis0212<<14 | 0x16<<7 | 0x0A, + 22300 - 19968: jis0208<<14 | 0x33<<7 | 0x07, + 22301 - 19968: jis0212<<14 | 0x16<<7 | 0x0B, + 22303 - 19968: jis0208<<14 | 0x24<<7 | 0x39, + 22304 - 19968: jis0212<<14 | 0x16<<7 | 0x0C, + 22306 - 19968: jis0212<<14 | 0x16<<7 | 0x0D, + 22307 - 19968: jis0212<<14 | 0x16<<7 | 0x0E, + 22308 - 19968: jis0212<<14 | 0x16<<7 | 0x0F, + 22309 - 19968: jis0212<<14 | 0x16<<7 | 0x10, + 22310 - 19968: jis0208<<14 | 0x33<<7 | 0x08, + 22311 - 19968: jis0208<<14 | 0x0F<<7 | 0x14, + 22312 - 19968: jis0208<<14 | 0x19<<7 | 0x3E, + 22313 - 19968: jis0212<<14 | 0x16<<7 | 0x11, + 22314 - 19968: jis0212<<14 | 0x16<<7 | 0x12, + 22316 - 19968: jis0212<<14 | 0x16<<7 | 0x13, + 22317 - 19968: jis0208<<14 | 0x16<<7 | 0x1C, + 22318 - 19968: jis0212<<14 | 0x16<<7 | 0x14, + 22319 - 19968: jis0212<<14 | 0x16<<7 | 0x15, + 22320 - 19968: jis0208<<14 | 0x22<<7 | 0x2E, + 22323 - 19968: jis0212<<14 | 0x16<<7 | 0x16, + 22324 - 19968: jis0212<<14 | 0x16<<7 | 0x17, + 22327 - 19968: jis0208<<14 | 0x33<<7 | 0x09, + 22328 - 19968: jis0208<<14 | 0x33<<7 | 0x0A, + 22331 - 19968: jis0208<<14 | 0x33<<7 | 0x0C, + 22333 - 19968: jis0212<<14 | 0x16<<7 | 0x18, + 22334 - 19968: jis0212<<14 | 0x16<<7 | 0x19, + 22335 - 19968: jis0212<<14 | 0x16<<7 | 0x1A, + 22336 - 19968: jis0208<<14 | 0x33<<7 | 0x0D, + 22338 - 19968: jis0208<<14 | 0x19<<7 | 0x43, + 22341 - 19968: jis0212<<14 | 0x16<<7 | 0x1B, + 22342 - 19968: jis0212<<14 | 0x16<<7 | 0x1C, + 22343 - 19968: jis0208<<14 | 0x15<<7 | 0x30, + 22346 - 19968: jis0208<<14 | 0x2A<<7 | 0x16, + 22348 - 19968: jis0212<<14 | 0x16<<7 | 0x1D, + 22349 - 19968: jis0212<<14 | 0x16<<7 | 0x1E, + 22350 - 19968: jis0208<<14 | 0x33<<7 | 0x0B, + 22351 - 19968: jis0208<<14 | 0x33<<7 | 0x0E, + 22352 - 19968: jis0208<<14 | 0x19<<7 | 0x20, + 22353 - 19968: jis0208<<14 | 0x18<<7 | 0x02, + 22354 - 19968: jis0212<<14 | 0x16<<7 | 0x1F, + 22361 - 19968: jis0208<<14 | 0x58<<7 | 0x39, + 22369 - 19968: jis0208<<14 | 0x33<<7 | 0x12, + 22370 - 19968: jis0212<<14 | 0x16<<7 | 0x20, + 22372 - 19968: jis0208<<14 | 0x19<<7 | 0x04, + 22373 - 19968: jis0208<<14 | 0x58<<7 | 0x3A, + 22374 - 19968: jis0208<<14 | 0x22<<7 | 0x12, + 22375 - 19968: jis0212<<14 | 0x16<<7 | 0x22, + 22376 - 19968: jis0212<<14 | 0x16<<7 | 0x23, + 22377 - 19968: jis0208<<14 | 0x33<<7 | 0x0F, + 22378 - 19968: jis0208<<14 | 0x23<<7 | 0x39, + 22379 - 19968: jis0212<<14 | 0x16<<7 | 0x24, + 22381 - 19968: jis0212<<14 | 0x16<<7 | 0x25, + 22382 - 19968: jis0212<<14 | 0x16<<7 | 0x26, + 22383 - 19968: jis0212<<14 | 0x16<<7 | 0x27, + 22384 - 19968: jis0212<<14 | 0x16<<7 | 0x28, + 22385 - 19968: jis0212<<14 | 0x16<<7 | 0x29, + 22387 - 19968: jis0212<<14 | 0x16<<7 | 0x2A, + 22388 - 19968: jis0212<<14 | 0x16<<7 | 0x2B, + 22389 - 19968: jis0212<<14 | 0x16<<7 | 0x2C, + 22391 - 19968: jis0212<<14 | 0x16<<7 | 0x2D, + 22393 - 19968: jis0212<<14 | 0x16<<7 | 0x2E, + 22394 - 19968: jis0212<<14 | 0x16<<7 | 0x2F, + 22395 - 19968: jis0212<<14 | 0x16<<7 | 0x30, + 22396 - 19968: jis0212<<14 | 0x16<<7 | 0x31, + 22398 - 19968: jis0212<<14 | 0x16<<7 | 0x32, + 22399 - 19968: jis0208<<14 | 0x33<<7 | 0x13, + 22401 - 19968: jis0212<<14 | 0x16<<7 | 0x33, + 22402 - 19968: jis0208<<14 | 0x1E<<7 | 0x41, + 22403 - 19968: jis0212<<14 | 0x16<<7 | 0x34, + 22408 - 19968: jis0208<<14 | 0x33<<7 | 0x11, + 22409 - 19968: jis0208<<14 | 0x33<<7 | 0x14, + 22411 - 19968: jis0208<<14 | 0x16<<7 | 0x1E, + 22412 - 19968: jis0212<<14 | 0x16<<7 | 0x35, + 22419 - 19968: jis0208<<14 | 0x33<<7 | 0x15, + 22420 - 19968: jis0212<<14 | 0x16<<7 | 0x36, + 22421 - 19968: jis0212<<14 | 0x16<<7 | 0x3F, + 22423 - 19968: jis0212<<14 | 0x16<<7 | 0x37, + 22425 - 19968: jis0212<<14 | 0x16<<7 | 0x38, + 22426 - 19968: jis0212<<14 | 0x16<<7 | 0x39, + 22428 - 19968: jis0212<<14 | 0x16<<7 | 0x3A, + 22429 - 19968: jis0212<<14 | 0x16<<7 | 0x3B, + 22430 - 19968: jis0212<<14 | 0x16<<7 | 0x3C, + 22431 - 19968: jis0212<<14 | 0x16<<7 | 0x3D, + 22432 - 19968: jis0208<<14 | 0x33<<7 | 0x16, + 22433 - 19968: jis0212<<14 | 0x16<<7 | 0x3E, + 22434 - 19968: jis0208<<14 | 0x18<<7 | 0x03, + 22435 - 19968: jis0208<<14 | 0x12<<7 | 0x1F, + 22436 - 19968: jis0208<<14 | 0x33<<7 | 0x18, + 22439 - 19968: jis0212<<14 | 0x16<<7 | 0x40, + 22440 - 19968: jis0212<<14 | 0x16<<7 | 0x41, + 22441 - 19968: jis0212<<14 | 0x16<<7 | 0x42, + 22442 - 19968: jis0208<<14 | 0x33<<7 | 0x19, + 22444 - 19968: jis0208<<14 | 0x58<<7 | 0x3B, + 22448 - 19968: jis0208<<14 | 0x33<<7 | 0x1A, + 22451 - 19968: jis0208<<14 | 0x33<<7 | 0x17, + 22456 - 19968: jis0212<<14 | 0x16<<7 | 0x44, + 22461 - 19968: jis0212<<14 | 0x16<<7 | 0x45, + 22464 - 19968: jis0208<<14 | 0x33<<7 | 0x10, + 22467 - 19968: jis0208<<14 | 0x33<<7 | 0x1B, + 22470 - 19968: jis0208<<14 | 0x33<<7 | 0x1C, + 22471 - 19968: jis0208<<14 | 0x58<<7 | 0x3D, + 22472 - 19968: jis0208<<14 | 0x58<<7 | 0x3C, + 22475 - 19968: jis0208<<14 | 0x2A<<7 | 0x43, + 22476 - 19968: jis0212<<14 | 0x16<<7 | 0x48, + 22478 - 19968: jis0208<<14 | 0x1D<<7 | 0x4A, + 22479 - 19968: jis0212<<14 | 0x16<<7 | 0x49, + 22482 - 19968: jis0208<<14 | 0x33<<7 | 0x1E, + 22483 - 19968: jis0208<<14 | 0x33<<7 | 0x1F, + 22484 - 19968: jis0208<<14 | 0x33<<7 | 0x1D, + 22485 - 19968: jis0212<<14 | 0x16<<7 | 0x4A, + 22486 - 19968: jis0208<<14 | 0x33<<7 | 0x21, + 22492 - 19968: jis0208<<14 | 0x26<<7 | 0x17, + 22493 - 19968: jis0212<<14 | 0x16<<7 | 0x4B, + 22494 - 19968: jis0212<<14 | 0x16<<7 | 0x4C, + 22495 - 19968: jis0208<<14 | 0x0F<<7 | 0x47, + 22496 - 19968: jis0208<<14 | 0x28<<7 | 0x35, + 22497 - 19968: jis0212<<14 | 0x16<<7 | 0x5D, + 22499 - 19968: jis0208<<14 | 0x33<<7 | 0x22, + 22500 - 19968: jis0212<<14 | 0x16<<7 | 0x4D, + 22502 - 19968: jis0212<<14 | 0x16<<7 | 0x4E, + 22503 - 19968: jis0212<<14 | 0x16<<7 | 0x4F, + 22505 - 19968: jis0212<<14 | 0x16<<7 | 0x50, + 22509 - 19968: jis0212<<14 | 0x16<<7 | 0x51, + 22512 - 19968: jis0212<<14 | 0x16<<7 | 0x52, + 22516 - 19968: jis0208<<14 | 0x1D<<7 | 0x5C, + 22517 - 19968: jis0212<<14 | 0x16<<7 | 0x53, + 22518 - 19968: jis0212<<14 | 0x16<<7 | 0x54, + 22519 - 19968: jis0208<<14 | 0x1B<<7 | 0x18, + 22520 - 19968: jis0212<<14 | 0x16<<7 | 0x55, + 22521 - 19968: jis0208<<14 | 0x26<<7 | 0x3C, + 22522 - 19968: jis0208<<14 | 0x13<<7 | 0x4F, + 22524 - 19968: jis0208<<14 | 0x19<<7 | 0x4A, + 22525 - 19968: jis0212<<14 | 0x16<<7 | 0x56, + 22526 - 19968: jis0212<<14 | 0x16<<7 | 0x57, + 22527 - 19968: jis0212<<14 | 0x16<<7 | 0x58, + 22528 - 19968: jis0208<<14 | 0x2A<<7 | 0x38, + 22530 - 19968: jis0208<<14 | 0x25<<7 | 0x11, + 22531 - 19968: jis0212<<14 | 0x16<<7 | 0x59, + 22532 - 19968: jis0212<<14 | 0x16<<7 | 0x5A, + 22533 - 19968: jis0208<<14 | 0x16<<7 | 0x57, + 22534 - 19968: jis0208<<14 | 0x21<<7 | 0x2E, + 22536 - 19968: jis0212<<14 | 0x16<<7 | 0x5B, + 22537 - 19968: jis0212<<14 | 0x16<<7 | 0x5C, + 22538 - 19968: jis0208<<14 | 0x33<<7 | 0x20, + 22539 - 19968: jis0208<<14 | 0x33<<7 | 0x23, + 22540 - 19968: jis0212<<14 | 0x17<<7 | 0x00, + 22541 - 19968: jis0212<<14 | 0x17<<7 | 0x01, + 22549 - 19968: jis0208<<14 | 0x21<<7 | 0x23, + 22553 - 19968: jis0208<<14 | 0x33<<7 | 0x24, + 22555 - 19968: jis0212<<14 | 0x17<<7 | 0x02, + 22557 - 19968: jis0208<<14 | 0x33<<7 | 0x25, + 22558 - 19968: jis0212<<14 | 0x17<<7 | 0x03, + 22559 - 19968: jis0212<<14 | 0x17<<7 | 0x04, + 22560 - 19968: jis0212<<14 | 0x17<<7 | 0x05, + 22561 - 19968: jis0208<<14 | 0x33<<7 | 0x27, + 22564 - 19968: jis0208<<14 | 0x23<<7 | 0x48, + 22566 - 19968: jis0212<<14 | 0x17<<7 | 0x06, + 22567 - 19968: jis0212<<14 | 0x17<<7 | 0x07, + 22570 - 19968: jis0208<<14 | 0x13<<7 | 0x0D, + 22573 - 19968: jis0212<<14 | 0x17<<7 | 0x08, + 22575 - 19968: jis0208<<14 | 0x53<<7 | 0x00, + 22576 - 19968: jis0208<<14 | 0x10<<7 | 0x40, + 22577 - 19968: jis0208<<14 | 0x29<<7 | 0x52, + 22578 - 19968: jis0212<<14 | 0x17<<7 | 0x09, + 22580 - 19968: jis0208<<14 | 0x1D<<7 | 0x4B, + 22581 - 19968: jis0208<<14 | 0x24<<7 | 0x27, + 22585 - 19968: jis0212<<14 | 0x17<<7 | 0x0A, + 22586 - 19968: jis0208<<14 | 0x19<<7 | 0x45, + 22589 - 19968: jis0208<<14 | 0x33<<7 | 0x2D, + 22591 - 19968: jis0212<<14 | 0x17<<7 | 0x0B, + 22592 - 19968: jis0208<<14 | 0x29<<7 | 0x1C, + 22593 - 19968: jis0208<<14 | 0x2D<<7 | 0x3C, + 22601 - 19968: jis0212<<14 | 0x17<<7 | 0x0C, + 22602 - 19968: jis0208<<14 | 0x11<<7 | 0x53, + 22603 - 19968: jis0208<<14 | 0x33<<7 | 0x29, + 22604 - 19968: jis0212<<14 | 0x17<<7 | 0x0D, + 22605 - 19968: jis0212<<14 | 0x17<<7 | 0x0E, + 22607 - 19968: jis0212<<14 | 0x17<<7 | 0x0F, + 22608 - 19968: jis0212<<14 | 0x17<<7 | 0x10, + 22609 - 19968: jis0208<<14 | 0x20<<7 | 0x19, + 22610 - 19968: jis0208<<14 | 0x33<<7 | 0x2C, + 22612 - 19968: jis0208<<14 | 0x24<<7 | 0x42, + 22613 - 19968: jis0212<<14 | 0x17<<7 | 0x11, + 22615 - 19968: jis0208<<14 | 0x24<<7 | 0x28, + 22616 - 19968: jis0208<<14 | 0x24<<7 | 0x43, + 22617 - 19968: jis0208<<14 | 0x27<<7 | 0x18, + 22618 - 19968: jis0208<<14 | 0x23<<7 | 0x2C, + 22622 - 19968: jis0208<<14 | 0x19<<7 | 0x28, + 22623 - 19968: jis0212<<14 | 0x17<<7 | 0x12, + 22625 - 19968: jis0212<<14 | 0x17<<7 | 0x13, + 22626 - 19968: jis0208<<14 | 0x33<<7 | 0x28, + 22628 - 19968: jis0212<<14 | 0x17<<7 | 0x14, + 22631 - 19968: jis0212<<14 | 0x17<<7 | 0x15, + 22632 - 19968: jis0212<<14 | 0x17<<7 | 0x16, + 22633 - 19968: jis0208<<14 | 0x10<<7 | 0x55, + 22635 - 19968: jis0208<<14 | 0x24<<7 | 0x15, + 22640 - 19968: jis0208<<14 | 0x33<<7 | 0x2A, + 22642 - 19968: jis0208<<14 | 0x33<<7 | 0x26, + 22645 - 19968: jis0208<<14 | 0x1E<<7 | 0x2F, + 22648 - 19968: jis0212<<14 | 0x17<<7 | 0x17, + 22649 - 19968: jis0208<<14 | 0x33<<7 | 0x2E, + 22652 - 19968: jis0212<<14 | 0x17<<7 | 0x18, + 22654 - 19968: jis0208<<14 | 0x1C<<7 | 0x2D, + 22655 - 19968: jis0212<<14 | 0x17<<7 | 0x19, + 22656 - 19968: jis0212<<14 | 0x17<<7 | 0x1A, + 22657 - 19968: jis0212<<14 | 0x17<<7 | 0x1B, + 22659 - 19968: jis0208<<14 | 0x15<<7 | 0x0C, + 22661 - 19968: jis0208<<14 | 0x33<<7 | 0x2F, + 22663 - 19968: jis0212<<14 | 0x17<<7 | 0x1C, + 22664 - 19968: jis0212<<14 | 0x17<<7 | 0x1D, + 22665 - 19968: jis0212<<14 | 0x17<<7 | 0x1E, + 22666 - 19968: jis0212<<14 | 0x17<<7 | 0x1F, + 22668 - 19968: jis0212<<14 | 0x17<<7 | 0x20, + 22669 - 19968: jis0212<<14 | 0x17<<7 | 0x21, + 22671 - 19968: jis0212<<14 | 0x17<<7 | 0x22, + 22672 - 19968: jis0212<<14 | 0x17<<7 | 0x23, + 22675 - 19968: jis0208<<14 | 0x29<<7 | 0x47, + 22676 - 19968: jis0212<<14 | 0x17<<7 | 0x24, + 22678 - 19968: jis0212<<14 | 0x17<<7 | 0x25, + 22679 - 19968: jis0208<<14 | 0x20<<7 | 0x5C, + 22684 - 19968: jis0208<<14 | 0x23<<7 | 0x25, + 22685 - 19968: jis0212<<14 | 0x17<<7 | 0x26, + 22686 - 19968: jis0208<<14 | 0x58<<7 | 0x40, + 22687 - 19968: jis0208<<14 | 0x33<<7 | 0x31, + 22688 - 19968: jis0212<<14 | 0x17<<7 | 0x27, + 22689 - 19968: jis0212<<14 | 0x17<<7 | 0x28, + 22690 - 19968: jis0212<<14 | 0x17<<7 | 0x29, + 22694 - 19968: jis0212<<14 | 0x17<<7 | 0x2A, + 22696 - 19968: jis0208<<14 | 0x2A<<7 | 0x2E, + 22697 - 19968: jis0212<<14 | 0x17<<7 | 0x2B, + 22699 - 19968: jis0208<<14 | 0x33<<7 | 0x32, + 22702 - 19968: jis0208<<14 | 0x33<<7 | 0x37, + 22705 - 19968: jis0212<<14 | 0x17<<7 | 0x2C, + 22706 - 19968: jis0208<<14 | 0x58<<7 | 0x41, + 22707 - 19968: jis0208<<14 | 0x29<<7 | 0x0E, + 22712 - 19968: jis0208<<14 | 0x33<<7 | 0x36, + 22713 - 19968: jis0208<<14 | 0x33<<7 | 0x30, + 22714 - 19968: jis0208<<14 | 0x33<<7 | 0x33, + 22715 - 19968: jis0208<<14 | 0x33<<7 | 0x35, + 22716 - 19968: jis0212<<14 | 0x17<<7 | 0x2F, + 22718 - 19968: jis0208<<14 | 0x19<<7 | 0x05, + 22721 - 19968: jis0208<<14 | 0x29<<7 | 0x28, + 22722 - 19968: jis0212<<14 | 0x17<<7 | 0x30, + 22724 - 19968: jis0212<<14 | 0x17<<7 | 0x2E, + 22725 - 19968: jis0208<<14 | 0x33<<7 | 0x38, + 22727 - 19968: jis0208<<14 | 0x22<<7 | 0x24, + 22728 - 19968: jis0212<<14 | 0x17<<7 | 0x31, + 22730 - 19968: jis0208<<14 | 0x11<<7 | 0x54, + 22732 - 19968: jis0208<<14 | 0x1D<<7 | 0x4C, + 22733 - 19968: jis0212<<14 | 0x17<<7 | 0x32, + 22734 - 19968: jis0212<<14 | 0x17<<7 | 0x33, + 22736 - 19968: jis0212<<14 | 0x17<<7 | 0x34, + 22737 - 19968: jis0208<<14 | 0x33<<7 | 0x3A, + 22738 - 19968: jis0212<<14 | 0x17<<7 | 0x35, + 22739 - 19968: jis0208<<14 | 0x33<<7 | 0x39, + 22740 - 19968: jis0212<<14 | 0x17<<7 | 0x36, + 22741 - 19968: jis0208<<14 | 0x18<<7 | 0x47, + 22742 - 19968: jis0212<<14 | 0x17<<7 | 0x37, + 22743 - 19968: jis0208<<14 | 0x33<<7 | 0x3B, + 22744 - 19968: jis0208<<14 | 0x33<<7 | 0x3D, + 22745 - 19968: jis0208<<14 | 0x33<<7 | 0x3C, + 22746 - 19968: jis0212<<14 | 0x17<<7 | 0x38, + 22748 - 19968: jis0208<<14 | 0x33<<7 | 0x3F, + 22749 - 19968: jis0212<<14 | 0x17<<7 | 0x39, + 22750 - 19968: jis0208<<14 | 0x33<<7 | 0x34, + 22751 - 19968: jis0208<<14 | 0x33<<7 | 0x41, + 22753 - 19968: jis0212<<14 | 0x17<<7 | 0x3A, + 22754 - 19968: jis0212<<14 | 0x17<<7 | 0x3B, + 22756 - 19968: jis0208<<14 | 0x33<<7 | 0x40, + 22757 - 19968: jis0208<<14 | 0x33<<7 | 0x3E, + 22761 - 19968: jis0212<<14 | 0x17<<7 | 0x3C, + 22763 - 19968: jis0208<<14 | 0x1A<<7 | 0x2D, + 22764 - 19968: jis0208<<14 | 0x1E<<7 | 0x30, + 22766 - 19968: jis0208<<14 | 0x20<<7 | 0x33, + 22767 - 19968: jis0208<<14 | 0x33<<7 | 0x42, + 22768 - 19968: jis0208<<14 | 0x1F<<7 | 0x1B, + 22769 - 19968: jis0208<<14 | 0x0F<<7 | 0x4C, + 22770 - 19968: jis0208<<14 | 0x26<<7 | 0x43, + 22771 - 19968: jis0212<<14 | 0x17<<7 | 0x3D, + 22775 - 19968: jis0208<<14 | 0x23<<7 | 0x3A, + 22777 - 19968: jis0208<<14 | 0x33<<7 | 0x44, + 22778 - 19968: jis0208<<14 | 0x33<<7 | 0x43, + 22779 - 19968: jis0208<<14 | 0x33<<7 | 0x45, + 22780 - 19968: jis0208<<14 | 0x33<<7 | 0x46, + 22781 - 19968: jis0208<<14 | 0x33<<7 | 0x47, + 22786 - 19968: jis0208<<14 | 0x33<<7 | 0x48, + 22789 - 19968: jis0212<<14 | 0x17<<7 | 0x3E, + 22790 - 19968: jis0212<<14 | 0x17<<7 | 0x3F, + 22793 - 19968: jis0208<<14 | 0x29<<7 | 0x30, + 22794 - 19968: jis0208<<14 | 0x33<<7 | 0x49, + 22795 - 19968: jis0208<<14 | 0x58<<7 | 0x42, + 22796 - 19968: jis0212<<14 | 0x17<<7 | 0x41, + 22799 - 19968: jis0208<<14 | 0x11<<7 | 0x25, + 22800 - 19968: jis0208<<14 | 0x33<<7 | 0x4A, + 22802 - 19968: jis0212<<14 | 0x17<<7 | 0x42, + 22803 - 19968: jis0212<<14 | 0x17<<7 | 0x43, + 22804 - 19968: jis0212<<14 | 0x17<<7 | 0x44, + 22805 - 19968: jis0208<<14 | 0x2C<<7 | 0x1B, + 22806 - 19968: jis0208<<14 | 0x12<<7 | 0x0F, + 22808 - 19968: jis0208<<14 | 0x31<<7 | 0x28, + 22809 - 19968: jis0208<<14 | 0x1C<<7 | 0x27, + 22810 - 19968: jis0208<<14 | 0x21<<7 | 0x1E, + 22811 - 19968: jis0208<<14 | 0x33<<7 | 0x4B, + 22812 - 19968: jis0208<<14 | 0x2B<<7 | 0x4A, + 22813 - 19968: jis0212<<14 | 0x17<<7 | 0x46, + 22817 - 19968: jis0212<<14 | 0x17<<7 | 0x47, + 22818 - 19968: jis0208<<14 | 0x2B<<7 | 0x13, + 22819 - 19968: jis0212<<14 | 0x17<<7 | 0x48, + 22820 - 19968: jis0212<<14 | 0x17<<7 | 0x49, + 22821 - 19968: jis0208<<14 | 0x33<<7 | 0x4D, + 22823 - 19968: jis0208<<14 | 0x21<<7 | 0x46, + 22824 - 19968: jis0212<<14 | 0x17<<7 | 0x4A, + 22825 - 19968: jis0208<<14 | 0x24<<7 | 0x16, + 22826 - 19968: jis0208<<14 | 0x21<<7 | 0x1F, + 22827 - 19968: jis0208<<14 | 0x28<<7 | 0x36, + 22828 - 19968: jis0208<<14 | 0x33<<7 | 0x4E, + 22829 - 19968: jis0208<<14 | 0x33<<7 | 0x4F, + 22830 - 19968: jis0208<<14 | 0x10<<7 | 0x5A, + 22831 - 19968: jis0212<<14 | 0x17<<7 | 0x4B, + 22832 - 19968: jis0212<<14 | 0x17<<7 | 0x4C, + 22833 - 19968: jis0208<<14 | 0x1B<<7 | 0x19, + 22834 - 19968: jis0208<<14 | 0x33<<7 | 0x50, + 22835 - 19968: jis0212<<14 | 0x17<<7 | 0x4D, + 22837 - 19968: jis0212<<14 | 0x17<<7 | 0x4E, + 22838 - 19968: jis0212<<14 | 0x17<<7 | 0x4F, + 22839 - 19968: jis0208<<14 | 0x0F<<7 | 0x2F, + 22840 - 19968: jis0208<<14 | 0x33<<7 | 0x51, + 22846 - 19968: jis0208<<14 | 0x33<<7 | 0x52, + 22847 - 19968: jis0212<<14 | 0x17<<7 | 0x50, + 22851 - 19968: jis0212<<14 | 0x17<<7 | 0x51, + 22852 - 19968: jis0208<<14 | 0x10<<7 | 0x41, + 22854 - 19968: jis0212<<14 | 0x17<<7 | 0x52, + 22855 - 19968: jis0208<<14 | 0x13<<7 | 0x50, + 22856 - 19968: jis0208<<14 | 0x25<<7 | 0x3F, + 22857 - 19968: jis0208<<14 | 0x29<<7 | 0x53, + 22862 - 19968: jis0208<<14 | 0x33<<7 | 0x56, + 22863 - 19968: jis0208<<14 | 0x20<<7 | 0x34, + 22864 - 19968: jis0208<<14 | 0x33<<7 | 0x55, + 22865 - 19968: jis0208<<14 | 0x16<<7 | 0x1F, + 22866 - 19968: jis0212<<14 | 0x17<<7 | 0x53, + 22867 - 19968: jis0208<<14 | 0x58<<7 | 0x43, + 22868 - 19968: jis0208<<14 | 0x2A<<7 | 0x3A, + 22869 - 19968: jis0208<<14 | 0x33<<7 | 0x54, + 22871 - 19968: jis0208<<14 | 0x24<<7 | 0x44, + 22872 - 19968: jis0208<<14 | 0x33<<7 | 0x58, + 22873 - 19968: jis0212<<14 | 0x17<<7 | 0x55, + 22874 - 19968: jis0208<<14 | 0x33<<7 | 0x57, + 22875 - 19968: jis0208<<14 | 0x58<<7 | 0x44, + 22877 - 19968: jis0208<<14 | 0x58<<7 | 0x45, + 22878 - 19968: jis0212<<14 | 0x17<<7 | 0x58, + 22879 - 19968: jis0212<<14 | 0x17<<7 | 0x59, + 22880 - 19968: jis0208<<14 | 0x33<<7 | 0x5A, + 22881 - 19968: jis0212<<14 | 0x17<<7 | 0x5A, + 22882 - 19968: jis0208<<14 | 0x33<<7 | 0x59, + 22883 - 19968: jis0208<<14 | 0x58<<7 | 0x46, + 22885 - 19968: jis0208<<14 | 0x10<<7 | 0x5B, + 22887 - 19968: jis0208<<14 | 0x33<<7 | 0x5B, + 22888 - 19968: jis0208<<14 | 0x1D<<7 | 0x08, + 22889 - 19968: jis0208<<14 | 0x33<<7 | 0x5D, + 22890 - 19968: jis0208<<14 | 0x22<<7 | 0x04, + 22891 - 19968: jis0212<<14 | 0x17<<7 | 0x5C, + 22892 - 19968: jis0208<<14 | 0x33<<7 | 0x5C, + 22893 - 19968: jis0212<<14 | 0x17<<7 | 0x5D, + 22894 - 19968: jis0208<<14 | 0x29<<7 | 0x12, + 22895 - 19968: jis0212<<14 | 0x18<<7 | 0x00, + 22898 - 19968: jis0212<<14 | 0x18<<7 | 0x01, + 22899 - 19968: jis0208<<14 | 0x1C<<7 | 0x56, + 22900 - 19968: jis0208<<14 | 0x24<<7 | 0x3A, + 22901 - 19968: jis0212<<14 | 0x18<<7 | 0x02, + 22902 - 19968: jis0212<<14 | 0x18<<7 | 0x03, + 22904 - 19968: jis0208<<14 | 0x34<<7 | 0x00, + 22905 - 19968: jis0212<<14 | 0x18<<7 | 0x04, + 22907 - 19968: jis0212<<14 | 0x18<<7 | 0x05, + 22908 - 19968: jis0212<<14 | 0x18<<7 | 0x06, + 22909 - 19968: jis0208<<14 | 0x18<<7 | 0x04, + 22913 - 19968: jis0208<<14 | 0x34<<7 | 0x01, + 22914 - 19968: jis0208<<14 | 0x26<<7 | 0x00, + 22915 - 19968: jis0208<<14 | 0x27<<7 | 0x3D, + 22916 - 19968: jis0208<<14 | 0x2B<<7 | 0x30, + 22922 - 19968: jis0208<<14 | 0x26<<7 | 0x04, + 22923 - 19968: jis0212<<14 | 0x18<<7 | 0x07, + 22924 - 19968: jis0212<<14 | 0x18<<7 | 0x08, + 22925 - 19968: jis0208<<14 | 0x34<<7 | 0x0A, + 22926 - 19968: jis0212<<14 | 0x18<<7 | 0x09, + 22930 - 19968: jis0212<<14 | 0x18<<7 | 0x0A, + 22931 - 19968: jis0208<<14 | 0x14<<7 | 0x17, + 22933 - 19968: jis0212<<14 | 0x18<<7 | 0x0B, + 22934 - 19968: jis0208<<14 | 0x2C<<7 | 0x24, + 22935 - 19968: jis0212<<14 | 0x18<<7 | 0x0C, + 22937 - 19968: jis0208<<14 | 0x2B<<7 | 0x0E, + 22939 - 19968: jis0208<<14 | 0x35<<7 | 0x0B, + 22941 - 19968: jis0208<<14 | 0x34<<7 | 0x02, + 22943 - 19968: jis0212<<14 | 0x18<<7 | 0x0D, + 22947 - 19968: jis0208<<14 | 0x34<<7 | 0x05, + 22948 - 19968: jis0208<<14 | 0x58<<7 | 0x47, + 22949 - 19968: jis0208<<14 | 0x21<<7 | 0x24, + 22951 - 19968: jis0212<<14 | 0x18<<7 | 0x0F, + 22952 - 19968: jis0208<<14 | 0x2A<<7 | 0x17, + 22956 - 19968: jis0208<<14 | 0x24<<7 | 0x29, + 22957 - 19968: jis0212<<14 | 0x18<<7 | 0x10, + 22958 - 19968: jis0212<<14 | 0x18<<7 | 0x11, + 22959 - 19968: jis0212<<14 | 0x18<<7 | 0x12, + 22960 - 19968: jis0212<<14 | 0x18<<7 | 0x13, + 22962 - 19968: jis0208<<14 | 0x34<<7 | 0x06, + 22963 - 19968: jis0212<<14 | 0x18<<7 | 0x14, + 22967 - 19968: jis0212<<14 | 0x18<<7 | 0x15, + 22969 - 19968: jis0208<<14 | 0x2A<<7 | 0x44, + 22970 - 19968: jis0208<<14 | 0x58<<7 | 0x48, + 22971 - 19968: jis0208<<14 | 0x19<<7 | 0x29, + 22972 - 19968: jis0212<<14 | 0x18<<7 | 0x17, + 22974 - 19968: jis0208<<14 | 0x1D<<7 | 0x09, + 22977 - 19968: jis0212<<14 | 0x18<<7 | 0x18, + 22979 - 19968: jis0212<<14 | 0x18<<7 | 0x19, + 22980 - 19968: jis0212<<14 | 0x18<<7 | 0x1A, + 22982 - 19968: jis0208<<14 | 0x34<<7 | 0x07, + 22984 - 19968: jis0212<<14 | 0x18<<7 | 0x1B, + 22985 - 19968: jis0208<<14 | 0x1A<<7 | 0x2F, + 22986 - 19968: jis0212<<14 | 0x18<<7 | 0x1C, + 22987 - 19968: jis0208<<14 | 0x1A<<7 | 0x2E, + 22989 - 19968: jis0212<<14 | 0x18<<7 | 0x1D, + 22992 - 19968: jis0208<<14 | 0x0F<<7 | 0x18, + 22993 - 19968: jis0208<<14 | 0x17<<7 | 0x27, + 22994 - 19968: jis0212<<14 | 0x18<<7 | 0x1E, + 22995 - 19968: jis0208<<14 | 0x1F<<7 | 0x0A, + 22996 - 19968: jis0208<<14 | 0x0F<<7 | 0x30, + 23001 - 19968: jis0208<<14 | 0x34<<7 | 0x0B, + 23002 - 19968: jis0208<<14 | 0x34<<7 | 0x0C, + 23004 - 19968: jis0208<<14 | 0x34<<7 | 0x09, + 23005 - 19968: jis0212<<14 | 0x18<<7 | 0x1F, + 23006 - 19968: jis0212<<14 | 0x18<<7 | 0x20, + 23007 - 19968: jis0212<<14 | 0x18<<7 | 0x21, + 23011 - 19968: jis0212<<14 | 0x18<<7 | 0x22, + 23012 - 19968: jis0212<<14 | 0x18<<7 | 0x23, + 23013 - 19968: jis0208<<14 | 0x10<<7 | 0x17, + 23014 - 19968: jis0208<<14 | 0x13<<7 | 0x0E, + 23015 - 19968: jis0212<<14 | 0x18<<7 | 0x24, + 23016 - 19968: jis0208<<14 | 0x34<<7 | 0x08, + 23018 - 19968: jis0208<<14 | 0x2B<<7 | 0x24, + 23019 - 19968: jis0208<<14 | 0x28<<7 | 0x10, + 23022 - 19968: jis0212<<14 | 0x18<<7 | 0x25, + 23023 - 19968: jis0212<<14 | 0x18<<7 | 0x26, + 23025 - 19968: jis0212<<14 | 0x18<<7 | 0x27, + 23026 - 19968: jis0212<<14 | 0x18<<7 | 0x28, + 23028 - 19968: jis0212<<14 | 0x18<<7 | 0x29, + 23030 - 19968: jis0208<<14 | 0x0F<<7 | 0x07, + 23031 - 19968: jis0212<<14 | 0x18<<7 | 0x2A, + 23035 - 19968: jis0208<<14 | 0x0F<<7 | 0x58, + 23039 - 19968: jis0208<<14 | 0x1A<<7 | 0x30, + 23040 - 19968: jis0212<<14 | 0x18<<7 | 0x2B, + 23041 - 19968: jis0208<<14 | 0x0F<<7 | 0x31, + 23043 - 19968: jis0208<<14 | 0x0F<<7 | 0x02, + 23044 - 19968: jis0212<<14 | 0x18<<7 | 0x2C, + 23049 - 19968: jis0208<<14 | 0x34<<7 | 0x11, + 23052 - 19968: jis0212<<14 | 0x18<<7 | 0x2D, + 23053 - 19968: jis0212<<14 | 0x18<<7 | 0x2E, + 23054 - 19968: jis0212<<14 | 0x18<<7 | 0x2F, + 23057 - 19968: jis0208<<14 | 0x34<<7 | 0x0F, + 23058 - 19968: jis0212<<14 | 0x18<<7 | 0x30, + 23059 - 19968: jis0212<<14 | 0x18<<7 | 0x31, + 23064 - 19968: jis0208<<14 | 0x2B<<7 | 0x1B, + 23066 - 19968: jis0208<<14 | 0x34<<7 | 0x12, + 23068 - 19968: jis0208<<14 | 0x34<<7 | 0x10, + 23070 - 19968: jis0212<<14 | 0x18<<7 | 0x32, + 23071 - 19968: jis0208<<14 | 0x34<<7 | 0x0E, + 23072 - 19968: jis0208<<14 | 0x1E<<7 | 0x10, + 23075 - 19968: jis0212<<14 | 0x18<<7 | 0x33, + 23076 - 19968: jis0212<<14 | 0x18<<7 | 0x34, + 23077 - 19968: jis0208<<14 | 0x34<<7 | 0x0D, + 23079 - 19968: jis0212<<14 | 0x18<<7 | 0x35, + 23080 - 19968: jis0212<<14 | 0x18<<7 | 0x36, + 23081 - 19968: jis0208<<14 | 0x29<<7 | 0x39, + 23082 - 19968: jis0212<<14 | 0x18<<7 | 0x37, + 23085 - 19968: jis0212<<14 | 0x18<<7 | 0x38, + 23087 - 19968: jis0208<<14 | 0x17<<7 | 0x43, + 23088 - 19968: jis0212<<14 | 0x18<<7 | 0x39, + 23093 - 19968: jis0208<<14 | 0x34<<7 | 0x16, + 23094 - 19968: jis0208<<14 | 0x34<<7 | 0x17, + 23100 - 19968: jis0208<<14 | 0x1D<<7 | 0x0A, + 23104 - 19968: jis0208<<14 | 0x34<<7 | 0x13, + 23105 - 19968: jis0208<<14 | 0x2E<<7 | 0x0B, + 23108 - 19968: jis0212<<14 | 0x18<<7 | 0x3A, + 23109 - 19968: jis0212<<14 | 0x18<<7 | 0x3B, + 23110 - 19968: jis0208<<14 | 0x26<<7 | 0x2B, + 23111 - 19968: jis0212<<14 | 0x18<<7 | 0x3C, + 23112 - 19968: jis0212<<14 | 0x18<<7 | 0x3D, + 23113 - 19968: jis0208<<14 | 0x34<<7 | 0x15, + 23116 - 19968: jis0212<<14 | 0x18<<7 | 0x3E, + 23120 - 19968: jis0212<<14 | 0x18<<7 | 0x3F, + 23125 - 19968: jis0212<<14 | 0x18<<7 | 0x40, + 23130 - 19968: jis0208<<14 | 0x19<<7 | 0x06, + 23134 - 19968: jis0212<<14 | 0x18<<7 | 0x41, + 23138 - 19968: jis0208<<14 | 0x34<<7 | 0x18, + 23139 - 19968: jis0212<<14 | 0x18<<7 | 0x42, + 23141 - 19968: jis0212<<14 | 0x18<<7 | 0x43, + 23142 - 19968: jis0208<<14 | 0x28<<7 | 0x37, + 23143 - 19968: jis0212<<14 | 0x18<<7 | 0x44, + 23146 - 19968: jis0208<<14 | 0x34<<7 | 0x19, + 23148 - 19968: jis0208<<14 | 0x34<<7 | 0x14, + 23149 - 19968: jis0212<<14 | 0x18<<7 | 0x45, + 23159 - 19968: jis0212<<14 | 0x18<<7 | 0x46, + 23162 - 19968: jis0212<<14 | 0x18<<7 | 0x47, + 23163 - 19968: jis0212<<14 | 0x18<<7 | 0x48, + 23166 - 19968: jis0212<<14 | 0x18<<7 | 0x49, + 23167 - 19968: jis0208<<14 | 0x2B<<7 | 0x1A, + 23179 - 19968: jis0212<<14 | 0x18<<7 | 0x4A, + 23184 - 19968: jis0212<<14 | 0x18<<7 | 0x4B, + 23186 - 19968: jis0208<<14 | 0x26<<7 | 0x3D, + 23187 - 19968: jis0212<<14 | 0x18<<7 | 0x4C, + 23190 - 19968: jis0212<<14 | 0x18<<7 | 0x4D, + 23193 - 19968: jis0212<<14 | 0x18<<7 | 0x4E, + 23194 - 19968: jis0208<<14 | 0x34<<7 | 0x1A, + 23195 - 19968: jis0208<<14 | 0x28<<7 | 0x11, + 23196 - 19968: jis0212<<14 | 0x18<<7 | 0x4F, + 23198 - 19968: jis0212<<14 | 0x18<<7 | 0x50, + 23199 - 19968: jis0212<<14 | 0x18<<7 | 0x51, + 23200 - 19968: jis0212<<14 | 0x18<<7 | 0x52, + 23202 - 19968: jis0212<<14 | 0x18<<7 | 0x53, + 23207 - 19968: jis0212<<14 | 0x18<<7 | 0x54, + 23212 - 19968: jis0212<<14 | 0x18<<7 | 0x55, + 23217 - 19968: jis0212<<14 | 0x18<<7 | 0x56, + 23218 - 19968: jis0212<<14 | 0x18<<7 | 0x57, + 23219 - 19968: jis0212<<14 | 0x18<<7 | 0x58, + 23221 - 19968: jis0212<<14 | 0x18<<7 | 0x59, + 23224 - 19968: jis0212<<14 | 0x18<<7 | 0x5A, + 23226 - 19968: jis0212<<14 | 0x18<<7 | 0x5B, + 23227 - 19968: jis0212<<14 | 0x18<<7 | 0x5C, + 23228 - 19968: jis0208<<14 | 0x34<<7 | 0x1B, + 23229 - 19968: jis0208<<14 | 0x34<<7 | 0x1F, + 23230 - 19968: jis0208<<14 | 0x34<<7 | 0x1C, + 23231 - 19968: jis0212<<14 | 0x18<<7 | 0x5D, + 23233 - 19968: jis0208<<14 | 0x11<<7 | 0x26, + 23234 - 19968: jis0208<<14 | 0x34<<7 | 0x1E, + 23236 - 19968: jis0212<<14 | 0x19<<7 | 0x00, + 23238 - 19968: jis0212<<14 | 0x19<<7 | 0x01, + 23240 - 19968: jis0212<<14 | 0x19<<7 | 0x02, + 23241 - 19968: jis0208<<14 | 0x1B<<7 | 0x1A, + 23243 - 19968: jis0208<<14 | 0x34<<7 | 0x1D, + 23244 - 19968: jis0208<<14 | 0x16<<7 | 0x58, + 23247 - 19968: jis0212<<14 | 0x19<<7 | 0x03, + 23248 - 19968: jis0208<<14 | 0x34<<7 | 0x2B, + 23254 - 19968: jis0208<<14 | 0x34<<7 | 0x24, + 23255 - 19968: jis0208<<14 | 0x34<<7 | 0x21, + 23258 - 19968: jis0212<<14 | 0x19<<7 | 0x04, + 23260 - 19968: jis0212<<14 | 0x19<<7 | 0x05, + 23264 - 19968: jis0212<<14 | 0x19<<7 | 0x06, + 23265 - 19968: jis0208<<14 | 0x22<<7 | 0x43, + 23267 - 19968: jis0208<<14 | 0x34<<7 | 0x20, + 23269 - 19968: jis0212<<14 | 0x19<<7 | 0x07, + 23270 - 19968: jis0208<<14 | 0x34<<7 | 0x22, + 23273 - 19968: jis0208<<14 | 0x34<<7 | 0x23, + 23274 - 19968: jis0212<<14 | 0x19<<7 | 0x08, + 23278 - 19968: jis0212<<14 | 0x19<<7 | 0x09, + 23285 - 19968: jis0212<<14 | 0x19<<7 | 0x0A, + 23286 - 19968: jis0212<<14 | 0x19<<7 | 0x0B, + 23290 - 19968: jis0208<<14 | 0x34<<7 | 0x25, + 23291 - 19968: jis0208<<14 | 0x34<<7 | 0x26, + 23293 - 19968: jis0212<<14 | 0x19<<7 | 0x0C, + 23296 - 19968: jis0212<<14 | 0x19<<7 | 0x0D, + 23297 - 19968: jis0212<<14 | 0x19<<7 | 0x0E, + 23304 - 19968: jis0212<<14 | 0x19<<7 | 0x0F, + 23305 - 19968: jis0208<<14 | 0x13<<7 | 0x51, + 23307 - 19968: jis0208<<14 | 0x34<<7 | 0x28, + 23308 - 19968: jis0208<<14 | 0x34<<7 | 0x27, + 23318 - 19968: jis0208<<14 | 0x34<<7 | 0x29, + 23319 - 19968: jis0212<<14 | 0x19<<7 | 0x10, + 23321 - 19968: jis0212<<14 | 0x19<<7 | 0x12, + 23323 - 19968: jis0212<<14 | 0x19<<7 | 0x13, + 23325 - 19968: jis0212<<14 | 0x19<<7 | 0x14, + 23329 - 19968: jis0212<<14 | 0x19<<7 | 0x15, + 23330 - 19968: jis0208<<14 | 0x1D<<7 | 0x4D, + 23333 - 19968: jis0212<<14 | 0x19<<7 | 0x16, + 23338 - 19968: jis0208<<14 | 0x34<<7 | 0x2C, + 23340 - 19968: jis0208<<14 | 0x23<<7 | 0x3B, + 23341 - 19968: jis0212<<14 | 0x19<<7 | 0x17, + 23344 - 19968: jis0208<<14 | 0x10<<7 | 0x24, + 23346 - 19968: jis0208<<14 | 0x34<<7 | 0x2A, + 23348 - 19968: jis0212<<14 | 0x19<<7 | 0x11, + 23350 - 19968: jis0208<<14 | 0x34<<7 | 0x2D, + 23352 - 19968: jis0212<<14 | 0x19<<7 | 0x18, + 23358 - 19968: jis0208<<14 | 0x34<<7 | 0x2E, + 23360 - 19968: jis0208<<14 | 0x34<<7 | 0x31, + 23361 - 19968: jis0212<<14 | 0x19<<7 | 0x19, + 23363 - 19968: jis0208<<14 | 0x34<<7 | 0x2F, + 23365 - 19968: jis0208<<14 | 0x34<<7 | 0x30, + 23371 - 19968: jis0212<<14 | 0x19<<7 | 0x1A, + 23372 - 19968: jis0212<<14 | 0x19<<7 | 0x1B, + 23376 - 19968: jis0208<<14 | 0x1A<<7 | 0x31, + 23377 - 19968: jis0208<<14 | 0x34<<7 | 0x32, + 23378 - 19968: jis0212<<14 | 0x19<<7 | 0x1C, + 23380 - 19968: jis0208<<14 | 0x18<<7 | 0x05, + 23381 - 19968: jis0208<<14 | 0x34<<7 | 0x33, + 23382 - 19968: jis0208<<14 | 0x58<<7 | 0x49, + 23383 - 19968: jis0208<<14 | 0x1A<<7 | 0x59, + 23384 - 19968: jis0208<<14 | 0x21<<7 | 0x17, + 23386 - 19968: jis0208<<14 | 0x34<<7 | 0x34, + 23387 - 19968: jis0208<<14 | 0x34<<7 | 0x35, + 23388 - 19968: jis0208<<14 | 0x1A<<7 | 0x39, + 23389 - 19968: jis0208<<14 | 0x18<<7 | 0x06, + 23390 - 19968: jis0212<<14 | 0x19<<7 | 0x1E, + 23391 - 19968: jis0208<<14 | 0x2B<<7 | 0x31, + 23395 - 19968: jis0208<<14 | 0x14<<7 | 0x07, + 23396 - 19968: jis0208<<14 | 0x17<<7 | 0x28, + 23397 - 19968: jis0208<<14 | 0x34<<7 | 0x36, + 23398 - 19968: jis0208<<14 | 0x12<<7 | 0x37, + 23400 - 19968: jis0212<<14 | 0x19<<7 | 0x1F, + 23401 - 19968: jis0208<<14 | 0x34<<7 | 0x37, + 23403 - 19968: jis0208<<14 | 0x21<<7 | 0x18, + 23406 - 19968: jis0212<<14 | 0x19<<7 | 0x20, + 23407 - 19968: jis0212<<14 | 0x19<<7 | 0x21, + 23408 - 19968: jis0208<<14 | 0x34<<7 | 0x38, + 23409 - 19968: jis0208<<14 | 0x35<<7 | 0x02, + 23411 - 19968: jis0208<<14 | 0x34<<7 | 0x39, + 23413 - 19968: jis0208<<14 | 0x34<<7 | 0x3A, + 23416 - 19968: jis0208<<14 | 0x34<<7 | 0x3B, + 23418 - 19968: jis0208<<14 | 0x34<<7 | 0x3D, + 23420 - 19968: jis0212<<14 | 0x19<<7 | 0x22, + 23421 - 19968: jis0212<<14 | 0x19<<7 | 0x23, + 23422 - 19968: jis0212<<14 | 0x19<<7 | 0x24, + 23423 - 19968: jis0212<<14 | 0x19<<7 | 0x25, + 23424 - 19968: jis0208<<14 | 0x34<<7 | 0x3E, + 23425 - 19968: jis0212<<14 | 0x19<<7 | 0x26, + 23427 - 19968: jis0208<<14 | 0x34<<7 | 0x3F, + 23428 - 19968: jis0212<<14 | 0x19<<7 | 0x27, + 23429 - 19968: jis0208<<14 | 0x21<<7 | 0x4F, + 23430 - 19968: jis0212<<14 | 0x19<<7 | 0x28, + 23431 - 19968: jis0208<<14 | 0x10<<7 | 0x06, + 23432 - 19968: jis0208<<14 | 0x1B<<7 | 0x48, + 23433 - 19968: jis0208<<14 | 0x0F<<7 | 0x21, + 23434 - 19968: jis0212<<14 | 0x19<<7 | 0x29, + 23435 - 19968: jis0208<<14 | 0x20<<7 | 0x36, + 23436 - 19968: jis0208<<14 | 0x13<<7 | 0x0F, + 23437 - 19968: jis0208<<14 | 0x1B<<7 | 0x14, + 23438 - 19968: jis0212<<14 | 0x19<<7 | 0x2A, + 23439 - 19968: jis0208<<14 | 0x18<<7 | 0x07, + 23440 - 19968: jis0212<<14 | 0x19<<7 | 0x2B, + 23441 - 19968: jis0212<<14 | 0x19<<7 | 0x2C, + 23443 - 19968: jis0212<<14 | 0x19<<7 | 0x2D, + 23444 - 19968: jis0212<<14 | 0x19<<7 | 0x2E, + 23445 - 19968: jis0208<<14 | 0x24<<7 | 0x45, + 23446 - 19968: jis0212<<14 | 0x19<<7 | 0x2F, + 23447 - 19968: jis0208<<14 | 0x1C<<7 | 0x00, + 23448 - 19968: jis0208<<14 | 0x13<<7 | 0x10, + 23449 - 19968: jis0208<<14 | 0x22<<7 | 0x47, + 23450 - 19968: jis0208<<14 | 0x23<<7 | 0x49, + 23451 - 19968: jis0208<<14 | 0x0F<<7 | 0x17, + 23452 - 19968: jis0208<<14 | 0x14<<7 | 0x18, + 23453 - 19968: jis0208<<14 | 0x29<<7 | 0x54, + 23455 - 19968: jis0208<<14 | 0x1B<<7 | 0x21, + 23458 - 19968: jis0208<<14 | 0x14<<7 | 0x31, + 23459 - 19968: jis0208<<14 | 0x1F<<7 | 0x4A, + 23460 - 19968: jis0208<<14 | 0x1B<<7 | 0x1B, + 23461 - 19968: jis0208<<14 | 0x2C<<7 | 0x07, + 23462 - 19968: jis0208<<14 | 0x34<<7 | 0x40, + 23464 - 19968: jis0212<<14 | 0x19<<7 | 0x30, + 23465 - 19968: jis0212<<14 | 0x19<<7 | 0x31, + 23468 - 19968: jis0212<<14 | 0x19<<7 | 0x32, + 23469 - 19968: jis0212<<14 | 0x19<<7 | 0x33, + 23470 - 19968: jis0208<<14 | 0x14<<7 | 0x3B, + 23471 - 19968: jis0212<<14 | 0x19<<7 | 0x34, + 23472 - 19968: jis0208<<14 | 0x19<<7 | 0x2A, + 23473 - 19968: jis0212<<14 | 0x19<<7 | 0x35, + 23474 - 19968: jis0212<<14 | 0x19<<7 | 0x36, + 23475 - 19968: jis0208<<14 | 0x12<<7 | 0x11, + 23476 - 19968: jis0208<<14 | 0x10<<7 | 0x42, + 23477 - 19968: jis0208<<14 | 0x1D<<7 | 0x0B, + 23478 - 19968: jis0208<<14 | 0x11<<7 | 0x27, + 23479 - 19968: jis0212<<14 | 0x19<<7 | 0x37, + 23480 - 19968: jis0208<<14 | 0x34<<7 | 0x41, + 23481 - 19968: jis0208<<14 | 0x2C<<7 | 0x25, + 23482 - 19968: jis0212<<14 | 0x19<<7 | 0x38, + 23484 - 19968: jis0212<<14 | 0x19<<7 | 0x39, + 23487 - 19968: jis0208<<14 | 0x1C<<7 | 0x28, + 23488 - 19968: jis0208<<14 | 0x58<<7 | 0x4A, + 23489 - 19968: jis0212<<14 | 0x19<<7 | 0x3B, + 23490 - 19968: jis0208<<14 | 0x1B<<7 | 0x43, + 23491 - 19968: jis0208<<14 | 0x34<<7 | 0x42, + 23492 - 19968: jis0208<<14 | 0x13<<7 | 0x52, + 23493 - 19968: jis0208<<14 | 0x25<<7 | 0x31, + 23494 - 19968: jis0208<<14 | 0x2B<<7 | 0x08, + 23495 - 19968: jis0208<<14 | 0x34<<7 | 0x43, + 23497 - 19968: jis0208<<14 | 0x34<<7 | 0x44, + 23500 - 19968: jis0208<<14 | 0x28<<7 | 0x38, + 23501 - 19968: jis0212<<14 | 0x19<<7 | 0x3C, + 23503 - 19968: jis0212<<14 | 0x19<<7 | 0x3D, + 23504 - 19968: jis0208<<14 | 0x34<<7 | 0x46, + 23506 - 19968: jis0208<<14 | 0x13<<7 | 0x07, + 23507 - 19968: jis0208<<14 | 0x15<<7 | 0x56, + 23508 - 19968: jis0208<<14 | 0x34<<7 | 0x45, + 23510 - 19968: jis0212<<14 | 0x19<<7 | 0x3E, + 23511 - 19968: jis0212<<14 | 0x19<<7 | 0x3F, + 23512 - 19968: jis0208<<14 | 0x58<<7 | 0x4C, + 23513 - 19968: jis0212<<14 | 0x19<<7 | 0x41, + 23514 - 19968: jis0212<<14 | 0x19<<7 | 0x42, + 23515 - 19968: jis0208<<14 | 0x13<<7 | 0x11, + 23517 - 19968: jis0208<<14 | 0x1E<<7 | 0x11, + 23518 - 19968: jis0208<<14 | 0x34<<7 | 0x4A, + 23519 - 19968: jis0208<<14 | 0x1A<<7 | 0x00, + 23520 - 19968: jis0212<<14 | 0x19<<7 | 0x43, + 23521 - 19968: jis0208<<14 | 0x11<<7 | 0x28, + 23522 - 19968: jis0208<<14 | 0x34<<7 | 0x49, + 23524 - 19968: jis0208<<14 | 0x34<<7 | 0x47, + 23525 - 19968: jis0208<<14 | 0x34<<7 | 0x4B, + 23526 - 19968: jis0208<<14 | 0x34<<7 | 0x48, + 23527 - 19968: jis0208<<14 | 0x26<<7 | 0x0A, + 23528 - 19968: jis0208<<14 | 0x3B<<7 | 0x2C, + 23529 - 19968: jis0208<<14 | 0x1E<<7 | 0x12, + 23531 - 19968: jis0208<<14 | 0x34<<7 | 0x4C, + 23532 - 19968: jis0208<<14 | 0x58<<7 | 0x4D, + 23534 - 19968: jis0208<<14 | 0x2D<<7 | 0x1F, + 23535 - 19968: jis0212<<14 | 0x19<<7 | 0x44, + 23536 - 19968: jis0208<<14 | 0x34<<7 | 0x4D, + 23537 - 19968: jis0212<<14 | 0x19<<7 | 0x45, + 23539 - 19968: jis0208<<14 | 0x34<<7 | 0x4F, + 23540 - 19968: jis0212<<14 | 0x19<<7 | 0x46, + 23541 - 19968: jis0208<<14 | 0x22<<7 | 0x5D, + 23542 - 19968: jis0208<<14 | 0x34<<7 | 0x4E, + 23544 - 19968: jis0208<<14 | 0x1F<<7 | 0x02, + 23546 - 19968: jis0208<<14 | 0x1A<<7 | 0x5A, + 23549 - 19968: jis0212<<14 | 0x19<<7 | 0x47, + 23550 - 19968: jis0208<<14 | 0x21<<7 | 0x2F, + 23551 - 19968: jis0208<<14 | 0x1B<<7 | 0x56, + 23553 - 19968: jis0208<<14 | 0x28<<7 | 0x54, + 23554 - 19968: jis0208<<14 | 0x1F<<7 | 0x4B, + 23556 - 19968: jis0208<<14 | 0x1B<<7 | 0x2C, + 23557 - 19968: jis0208<<14 | 0x34<<7 | 0x50, + 23558 - 19968: jis0208<<14 | 0x1D<<7 | 0x0C, + 23559 - 19968: jis0208<<14 | 0x34<<7 | 0x51, + 23560 - 19968: jis0208<<14 | 0x34<<7 | 0x52, + 23561 - 19968: jis0208<<14 | 0x0F<<7 | 0x32, + 23562 - 19968: jis0208<<14 | 0x21<<7 | 0x19, + 23563 - 19968: jis0208<<14 | 0x1E<<7 | 0x31, + 23564 - 19968: jis0212<<14 | 0x19<<7 | 0x48, + 23565 - 19968: jis0208<<14 | 0x34<<7 | 0x53, + 23566 - 19968: jis0208<<14 | 0x25<<7 | 0x12, + 23567 - 19968: jis0208<<14 | 0x1D<<7 | 0x0D, + 23569 - 19968: jis0208<<14 | 0x1D<<7 | 0x0E, + 23571 - 19968: jis0208<<14 | 0x34<<7 | 0x54, + 23574 - 19968: jis0208<<14 | 0x1F<<7 | 0x4C, + 23575 - 19968: jis0212<<14 | 0x19<<7 | 0x49, + 23578 - 19968: jis0208<<14 | 0x1D<<7 | 0x0F, + 23582 - 19968: jis0208<<14 | 0x58<<7 | 0x4E, + 23583 - 19968: jis0212<<14 | 0x19<<7 | 0x4B, + 23584 - 19968: jis0208<<14 | 0x34<<7 | 0x55, + 23586 - 19968: jis0208<<14 | 0x34<<7 | 0x56, + 23587 - 19968: jis0212<<14 | 0x19<<7 | 0x4C, + 23588 - 19968: jis0208<<14 | 0x2B<<7 | 0x3F, + 23590 - 19968: jis0212<<14 | 0x19<<7 | 0x4D, + 23592 - 19968: jis0208<<14 | 0x34<<7 | 0x57, + 23593 - 19968: jis0212<<14 | 0x19<<7 | 0x4E, + 23595 - 19968: jis0212<<14 | 0x19<<7 | 0x4F, + 23596 - 19968: jis0212<<14 | 0x19<<7 | 0x50, + 23597 - 19968: jis0208<<14 | 0x15<<7 | 0x25, + 23598 - 19968: jis0212<<14 | 0x19<<7 | 0x51, + 23600 - 19968: jis0212<<14 | 0x19<<7 | 0x52, + 23601 - 19968: jis0208<<14 | 0x1C<<7 | 0x01, + 23602 - 19968: jis0212<<14 | 0x19<<7 | 0x53, + 23605 - 19968: jis0212<<14 | 0x19<<7 | 0x54, + 23606 - 19968: jis0212<<14 | 0x19<<7 | 0x55, + 23608 - 19968: jis0208<<14 | 0x34<<7 | 0x58, + 23609 - 19968: jis0208<<14 | 0x34<<7 | 0x59, + 23610 - 19968: jis0208<<14 | 0x1B<<7 | 0x3B, + 23611 - 19968: jis0208<<14 | 0x1E<<7 | 0x0B, + 23612 - 19968: jis0208<<14 | 0x25<<7 | 0x53, + 23613 - 19968: jis0208<<14 | 0x1E<<7 | 0x33, + 23614 - 19968: jis0208<<14 | 0x27<<7 | 0x57, + 23615 - 19968: jis0208<<14 | 0x26<<7 | 0x01, + 23616 - 19968: jis0208<<14 | 0x15<<7 | 0x28, + 23617 - 19968: jis0208<<14 | 0x34<<7 | 0x5A, + 23621 - 19968: jis0208<<14 | 0x14<<7 | 0x4E, + 23622 - 19968: jis0208<<14 | 0x34<<7 | 0x5B, + 23624 - 19968: jis0208<<14 | 0x15<<7 | 0x5D, + 23626 - 19968: jis0208<<14 | 0x25<<7 | 0x2E, + 23627 - 19968: jis0208<<14 | 0x11<<7 | 0x0F, + 23629 - 19968: jis0208<<14 | 0x1A<<7 | 0x32, + 23630 - 19968: jis0208<<14 | 0x34<<7 | 0x5C, + 23631 - 19968: jis0208<<14 | 0x35<<7 | 0x01, + 23632 - 19968: jis0208<<14 | 0x35<<7 | 0x00, + 23633 - 19968: jis0208<<14 | 0x15<<7 | 0x5C, + 23635 - 19968: jis0208<<14 | 0x34<<7 | 0x5D, + 23637 - 19968: jis0208<<14 | 0x24<<7 | 0x17, + 23641 - 19968: jis0212<<14 | 0x19<<7 | 0x56, + 23642 - 19968: jis0212<<14 | 0x19<<7 | 0x57, + 23644 - 19968: jis0212<<14 | 0x19<<7 | 0x58, + 23646 - 19968: jis0208<<14 | 0x21<<7 | 0x0F, + 23648 - 19968: jis0208<<14 | 0x24<<7 | 0x2A, + 23649 - 19968: jis0208<<14 | 0x1B<<7 | 0x27, + 23650 - 19968: jis0212<<14 | 0x19<<7 | 0x59, + 23651 - 19968: jis0212<<14 | 0x19<<7 | 0x5A, + 23652 - 19968: jis0208<<14 | 0x20<<7 | 0x37, + 23653 - 19968: jis0208<<14 | 0x2C<<7 | 0x59, + 23655 - 19968: jis0212<<14 | 0x19<<7 | 0x5B, + 23656 - 19968: jis0212<<14 | 0x19<<7 | 0x5C, + 23657 - 19968: jis0212<<14 | 0x19<<7 | 0x5D, + 23660 - 19968: jis0208<<14 | 0x35<<7 | 0x03, + 23661 - 19968: jis0212<<14 | 0x1A<<7 | 0x00, + 23662 - 19968: jis0208<<14 | 0x35<<7 | 0x04, + 23663 - 19968: jis0208<<14 | 0x25<<7 | 0x35, + 23664 - 19968: jis0212<<14 | 0x1A<<7 | 0x01, + 23665 - 19968: jis0208<<14 | 0x1A<<7 | 0x12, + 23668 - 19968: jis0212<<14 | 0x1A<<7 | 0x02, + 23669 - 19968: jis0212<<14 | 0x1A<<7 | 0x03, + 23670 - 19968: jis0208<<14 | 0x35<<7 | 0x06, + 23673 - 19968: jis0208<<14 | 0x35<<7 | 0x07, + 23674 - 19968: jis0212<<14 | 0x1A<<7 | 0x04, + 23675 - 19968: jis0212<<14 | 0x1A<<7 | 0x05, + 23676 - 19968: jis0212<<14 | 0x1A<<7 | 0x06, + 23677 - 19968: jis0212<<14 | 0x1A<<7 | 0x07, + 23687 - 19968: jis0212<<14 | 0x1A<<7 | 0x08, + 23688 - 19968: jis0212<<14 | 0x1A<<7 | 0x09, + 23690 - 19968: jis0212<<14 | 0x1A<<7 | 0x0A, + 23692 - 19968: jis0208<<14 | 0x35<<7 | 0x08, + 23695 - 19968: jis0212<<14 | 0x1A<<7 | 0x0B, + 23696 - 19968: jis0208<<14 | 0x13<<7 | 0x53, + 23697 - 19968: jis0208<<14 | 0x35<<7 | 0x09, + 23698 - 19968: jis0212<<14 | 0x1A<<7 | 0x0C, + 23700 - 19968: jis0208<<14 | 0x35<<7 | 0x0A, + 23709 - 19968: jis0212<<14 | 0x1A<<7 | 0x0D, + 23711 - 19968: jis0212<<14 | 0x1A<<7 | 0x0E, + 23712 - 19968: jis0212<<14 | 0x1A<<7 | 0x0F, + 23713 - 19968: jis0208<<14 | 0x11<<7 | 0x0B, + 23714 - 19968: jis0212<<14 | 0x1A<<7 | 0x10, + 23715 - 19968: jis0212<<14 | 0x1A<<7 | 0x11, + 23718 - 19968: jis0208<<14 | 0x58<<7 | 0x4F, + 23720 - 19968: jis0208<<14 | 0x20<<7 | 0x1A, + 23721 - 19968: jis0208<<14 | 0x13<<7 | 0x43, + 23722 - 19968: jis0212<<14 | 0x1A<<7 | 0x13, + 23723 - 19968: jis0208<<14 | 0x35<<7 | 0x0C, + 23724 - 19968: jis0208<<14 | 0x2B<<7 | 0x07, + 23729 - 19968: jis0208<<14 | 0x21<<7 | 0x31, + 23730 - 19968: jis0212<<14 | 0x1A<<7 | 0x14, + 23731 - 19968: jis0208<<14 | 0x12<<7 | 0x38, + 23732 - 19968: jis0212<<14 | 0x1A<<7 | 0x15, + 23733 - 19968: jis0212<<14 | 0x1A<<7 | 0x16, + 23734 - 19968: jis0208<<14 | 0x35<<7 | 0x0E, + 23735 - 19968: jis0208<<14 | 0x35<<7 | 0x10, + 23736 - 19968: jis0208<<14 | 0x13<<7 | 0x3E, + 23738 - 19968: jis0208<<14 | 0x58<<7 | 0x50, + 23739 - 19968: jis0208<<14 | 0x35<<7 | 0x0D, + 23740 - 19968: jis0208<<14 | 0x35<<7 | 0x0F, + 23742 - 19968: jis0208<<14 | 0x35<<7 | 0x12, + 23749 - 19968: jis0208<<14 | 0x35<<7 | 0x11, + 23751 - 19968: jis0208<<14 | 0x35<<7 | 0x13, + 23753 - 19968: jis0212<<14 | 0x1A<<7 | 0x18, + 23755 - 19968: jis0212<<14 | 0x1A<<7 | 0x19, + 23762 - 19968: jis0212<<14 | 0x1A<<7 | 0x1A, + 23767 - 19968: jis0212<<14 | 0x1A<<7 | 0x1C, + 23769 - 19968: jis0208<<14 | 0x35<<7 | 0x14, + 23773 - 19968: jis0212<<14 | 0x1A<<7 | 0x1B, + 23776 - 19968: jis0208<<14 | 0x25<<7 | 0x1C, + 23777 - 19968: jis0208<<14 | 0x15<<7 | 0x0D, + 23784 - 19968: jis0208<<14 | 0x11<<7 | 0x44, + 23785 - 19968: jis0208<<14 | 0x35<<7 | 0x15, + 23786 - 19968: jis0208<<14 | 0x35<<7 | 0x1A, + 23789 - 19968: jis0208<<14 | 0x35<<7 | 0x18, + 23790 - 19968: jis0212<<14 | 0x1A<<7 | 0x1D, + 23791 - 19968: jis0208<<14 | 0x29<<7 | 0x56, + 23792 - 19968: jis0208<<14 | 0x29<<7 | 0x55, + 23793 - 19968: jis0212<<14 | 0x1A<<7 | 0x1E, + 23794 - 19968: jis0212<<14 | 0x1A<<7 | 0x1F, + 23796 - 19968: jis0212<<14 | 0x1A<<7 | 0x20, + 23797 - 19968: jis0208<<14 | 0x58<<7 | 0x51, + 23798 - 19968: jis0208<<14 | 0x24<<7 | 0x46, + 23802 - 19968: jis0208<<14 | 0x35<<7 | 0x17, + 23803 - 19968: jis0208<<14 | 0x1C<<7 | 0x33, + 23805 - 19968: jis0208<<14 | 0x35<<7 | 0x16, + 23809 - 19968: jis0212<<14 | 0x1A<<7 | 0x21, + 23814 - 19968: jis0212<<14 | 0x1A<<7 | 0x22, + 23815 - 19968: jis0208<<14 | 0x1E<<7 | 0x51, + 23819 - 19968: jis0208<<14 | 0x35<<7 | 0x1B, + 23821 - 19968: jis0212<<14 | 0x1A<<7 | 0x23, + 23822 - 19968: jis0208<<14 | 0x19<<7 | 0x49, + 23825 - 19968: jis0208<<14 | 0x35<<7 | 0x21, + 23826 - 19968: jis0212<<14 | 0x1A<<7 | 0x24, + 23828 - 19968: jis0208<<14 | 0x35<<7 | 0x22, + 23829 - 19968: jis0208<<14 | 0x35<<7 | 0x1C, + 23830 - 19968: jis0208<<14 | 0x12<<7 | 0x12, + 23831 - 19968: jis0208<<14 | 0x35<<7 | 0x1D, + 23832 - 19968: jis0208<<14 | 0x35<<7 | 0x26, + 23833 - 19968: jis0208<<14 | 0x35<<7 | 0x25, + 23834 - 19968: jis0208<<14 | 0x35<<7 | 0x24, + 23835 - 19968: jis0208<<14 | 0x35<<7 | 0x20, + 23839 - 19968: jis0208<<14 | 0x35<<7 | 0x1F, + 23842 - 19968: jis0208<<14 | 0x35<<7 | 0x23, + 23843 - 19968: jis0212<<14 | 0x1A<<7 | 0x26, + 23844 - 19968: jis0212<<14 | 0x1A<<7 | 0x27, + 23846 - 19968: jis0212<<14 | 0x1A<<7 | 0x28, + 23847 - 19968: jis0208<<14 | 0x58<<7 | 0x52, + 23849 - 19968: jis0208<<14 | 0x29<<7 | 0x57, + 23851 - 19968: jis0212<<14 | 0x1A<<7 | 0x25, + 23857 - 19968: jis0212<<14 | 0x1A<<7 | 0x2A, + 23860 - 19968: jis0212<<14 | 0x1A<<7 | 0x2B, + 23865 - 19968: jis0212<<14 | 0x1A<<7 | 0x2C, + 23869 - 19968: jis0212<<14 | 0x1A<<7 | 0x2D, + 23871 - 19968: jis0212<<14 | 0x1A<<7 | 0x2E, + 23874 - 19968: jis0208<<14 | 0x58<<7 | 0x55, + 23875 - 19968: jis0212<<14 | 0x1A<<7 | 0x30, + 23878 - 19968: jis0212<<14 | 0x1A<<7 | 0x31, + 23880 - 19968: jis0212<<14 | 0x1A<<7 | 0x32, + 23882 - 19968: jis0212<<14 | 0x1A<<7 | 0x36, + 23883 - 19968: jis0208<<14 | 0x35<<7 | 0x2A, + 23884 - 19968: jis0208<<14 | 0x35<<7 | 0x27, + 23886 - 19968: jis0208<<14 | 0x35<<7 | 0x29, + 23888 - 19968: jis0208<<14 | 0x2C<<7 | 0x51, + 23889 - 19968: jis0212<<14 | 0x1A<<7 | 0x34, + 23890 - 19968: jis0208<<14 | 0x35<<7 | 0x28, + 23891 - 19968: jis0208<<14 | 0x58<<7 | 0x53, + 23893 - 19968: jis0212<<14 | 0x1A<<7 | 0x33, + 23897 - 19968: jis0212<<14 | 0x1A<<7 | 0x35, + 23900 - 19968: jis0208<<14 | 0x35<<7 | 0x1E, + 23903 - 19968: jis0212<<14 | 0x1A<<7 | 0x37, + 23904 - 19968: jis0212<<14 | 0x1A<<7 | 0x38, + 23905 - 19968: jis0212<<14 | 0x1A<<7 | 0x39, + 23906 - 19968: jis0212<<14 | 0x1A<<7 | 0x3A, + 23908 - 19968: jis0212<<14 | 0x1A<<7 | 0x3B, + 23913 - 19968: jis0208<<14 | 0x1E<<7 | 0x52, + 23914 - 19968: jis0212<<14 | 0x1A<<7 | 0x3C, + 23916 - 19968: jis0208<<14 | 0x35<<7 | 0x2B, + 23917 - 19968: jis0208<<14 | 0x58<<7 | 0x56, + 23919 - 19968: jis0208<<14 | 0x19<<7 | 0x16, + 23920 - 19968: jis0212<<14 | 0x1A<<7 | 0x3E, + 23923 - 19968: jis0208<<14 | 0x35<<7 | 0x2C, + 23926 - 19968: jis0208<<14 | 0x35<<7 | 0x2D, + 23929 - 19968: jis0212<<14 | 0x1A<<7 | 0x3F, + 23930 - 19968: jis0212<<14 | 0x1A<<7 | 0x40, + 23934 - 19968: jis0212<<14 | 0x1A<<7 | 0x41, + 23935 - 19968: jis0212<<14 | 0x1A<<7 | 0x42, + 23937 - 19968: jis0212<<14 | 0x1A<<7 | 0x43, + 23938 - 19968: jis0208<<14 | 0x35<<7 | 0x30, + 23939 - 19968: jis0212<<14 | 0x1A<<7 | 0x44, + 23940 - 19968: jis0208<<14 | 0x35<<7 | 0x2F, + 23943 - 19968: jis0208<<14 | 0x35<<7 | 0x2E, + 23944 - 19968: jis0212<<14 | 0x1A<<7 | 0x45, + 23946 - 19968: jis0212<<14 | 0x1A<<7 | 0x46, + 23947 - 19968: jis0208<<14 | 0x24<<7 | 0x47, + 23948 - 19968: jis0208<<14 | 0x35<<7 | 0x19, + 23952 - 19968: jis0208<<14 | 0x35<<7 | 0x36, + 23954 - 19968: jis0212<<14 | 0x1A<<7 | 0x47, + 23955 - 19968: jis0212<<14 | 0x1A<<7 | 0x48, + 23956 - 19968: jis0212<<14 | 0x1A<<7 | 0x49, + 23957 - 19968: jis0212<<14 | 0x1A<<7 | 0x4A, + 23961 - 19968: jis0212<<14 | 0x1A<<7 | 0x4B, + 23963 - 19968: jis0212<<14 | 0x1A<<7 | 0x4C, + 23965 - 19968: jis0208<<14 | 0x35<<7 | 0x32, + 23967 - 19968: jis0212<<14 | 0x1A<<7 | 0x4D, + 23968 - 19968: jis0212<<14 | 0x1A<<7 | 0x4E, + 23970 - 19968: jis0208<<14 | 0x35<<7 | 0x31, + 23975 - 19968: jis0212<<14 | 0x1A<<7 | 0x4F, + 23979 - 19968: jis0212<<14 | 0x1A<<7 | 0x50, + 23980 - 19968: jis0208<<14 | 0x35<<7 | 0x33, + 23982 - 19968: jis0208<<14 | 0x35<<7 | 0x34, + 23984 - 19968: jis0212<<14 | 0x1A<<7 | 0x51, + 23986 - 19968: jis0212<<14 | 0x45<<7 | 0x53, + 23988 - 19968: jis0212<<14 | 0x1A<<7 | 0x52, + 23991 - 19968: jis0208<<14 | 0x35<<7 | 0x37, + 23992 - 19968: jis0208<<14 | 0x58<<7 | 0x57, + 23993 - 19968: jis0208<<14 | 0x58<<7 | 0x58, + 23994 - 19968: jis0208<<14 | 0x2D<<7 | 0x45, + 23996 - 19968: jis0208<<14 | 0x35<<7 | 0x38, + 23997 - 19968: jis0208<<14 | 0x35<<7 | 0x35, + 24003 - 19968: jis0212<<14 | 0x1A<<7 | 0x55, + 24007 - 19968: jis0212<<14 | 0x1A<<7 | 0x56, + 24009 - 19968: jis0208<<14 | 0x35<<7 | 0x39, + 24011 - 19968: jis0212<<14 | 0x1A<<7 | 0x57, + 24012 - 19968: jis0208<<14 | 0x13<<7 | 0x3F, + 24013 - 19968: jis0208<<14 | 0x35<<7 | 0x3A, + 24014 - 19968: jis0212<<14 | 0x1A<<7 | 0x59, + 24016 - 19968: jis0208<<14 | 0x58<<7 | 0x59, + 24018 - 19968: jis0208<<14 | 0x35<<7 | 0x3C, + 24019 - 19968: jis0208<<14 | 0x35<<7 | 0x3B, + 24022 - 19968: jis0208<<14 | 0x35<<7 | 0x3D, + 24024 - 19968: jis0212<<14 | 0x1A<<7 | 0x5A, + 24025 - 19968: jis0212<<14 | 0x1A<<7 | 0x5B, + 24027 - 19968: jis0208<<14 | 0x35<<7 | 0x3E, + 24029 - 19968: jis0208<<14 | 0x1F<<7 | 0x4D, + 24030 - 19968: jis0208<<14 | 0x1C<<7 | 0x02, + 24032 - 19968: jis0212<<14 | 0x1A<<7 | 0x5C, + 24033 - 19968: jis0208<<14 | 0x1C<<7 | 0x43, + 24035 - 19968: jis0208<<14 | 0x20<<7 | 0x42, + 24036 - 19968: jis0212<<14 | 0x1A<<7 | 0x5D, + 24037 - 19968: jis0208<<14 | 0x18<<7 | 0x08, + 24038 - 19968: jis0208<<14 | 0x19<<7 | 0x17, + 24039 - 19968: jis0208<<14 | 0x18<<7 | 0x09, + 24040 - 19968: jis0208<<14 | 0x14<<7 | 0x4F, + 24041 - 19968: jis0212<<14 | 0x1B<<7 | 0x00, + 24043 - 19968: jis0208<<14 | 0x35<<7 | 0x3F, + 24046 - 19968: jis0208<<14 | 0x19<<7 | 0x18, + 24049 - 19968: jis0208<<14 | 0x17<<7 | 0x29, + 24050 - 19968: jis0208<<14 | 0x35<<7 | 0x40, + 24051 - 19968: jis0208<<14 | 0x2B<<7 | 0x05, + 24052 - 19968: jis0208<<14 | 0x26<<7 | 0x22, + 24053 - 19968: jis0208<<14 | 0x35<<7 | 0x41, + 24055 - 19968: jis0208<<14 | 0x18<<7 | 0x0A, + 24056 - 19968: jis0212<<14 | 0x1B<<7 | 0x01, + 24057 - 19968: jis0212<<14 | 0x1B<<7 | 0x02, + 24059 - 19968: jis0208<<14 | 0x13<<7 | 0x0B, + 24061 - 19968: jis0208<<14 | 0x22<<7 | 0x06, + 24062 - 19968: jis0208<<14 | 0x15<<7 | 0x31, + 24064 - 19968: jis0212<<14 | 0x1B<<7 | 0x03, + 24066 - 19968: jis0208<<14 | 0x1A<<7 | 0x33, + 24067 - 19968: jis0208<<14 | 0x28<<7 | 0x3A, + 24070 - 19968: jis0208<<14 | 0x27<<7 | 0x20, + 24071 - 19968: jis0212<<14 | 0x1B<<7 | 0x04, + 24075 - 19968: jis0208<<14 | 0x35<<7 | 0x42, + 24076 - 19968: jis0208<<14 | 0x13<<7 | 0x54, + 24077 - 19968: jis0212<<14 | 0x1B<<7 | 0x05, + 24081 - 19968: jis0208<<14 | 0x35<<7 | 0x45, + 24082 - 19968: jis0212<<14 | 0x1B<<7 | 0x06, + 24084 - 19968: jis0212<<14 | 0x1B<<7 | 0x07, + 24085 - 19968: jis0212<<14 | 0x1B<<7 | 0x08, + 24086 - 19968: jis0208<<14 | 0x23<<7 | 0x00, + 24088 - 19968: jis0212<<14 | 0x1B<<7 | 0x09, + 24089 - 19968: jis0208<<14 | 0x35<<7 | 0x44, + 24090 - 19968: jis0208<<14 | 0x35<<7 | 0x43, + 24091 - 19968: jis0208<<14 | 0x35<<7 | 0x46, + 24093 - 19968: jis0208<<14 | 0x23<<7 | 0x4A, + 24095 - 19968: jis0212<<14 | 0x1B<<7 | 0x0A, + 24096 - 19968: jis0212<<14 | 0x1B<<7 | 0x0B, + 24101 - 19968: jis0208<<14 | 0x1E<<7 | 0x42, + 24104 - 19968: jis0212<<14 | 0x1B<<7 | 0x0D, + 24107 - 19968: jis0208<<14 | 0x1A<<7 | 0x34, + 24109 - 19968: jis0208<<14 | 0x1F<<7 | 0x29, + 24110 - 19968: jis0212<<14 | 0x1B<<7 | 0x0C, + 24111 - 19968: jis0208<<14 | 0x21<<7 | 0x32, + 24112 - 19968: jis0208<<14 | 0x14<<7 | 0x01, + 24114 - 19968: jis0212<<14 | 0x1B<<7 | 0x0E, + 24115 - 19968: jis0208<<14 | 0x23<<7 | 0x01, + 24117 - 19968: jis0212<<14 | 0x1B<<7 | 0x0F, + 24118 - 19968: jis0208<<14 | 0x35<<7 | 0x47, + 24119 - 19968: jis0208<<14 | 0x35<<7 | 0x48, + 24120 - 19968: jis0208<<14 | 0x1D<<7 | 0x4E, + 24125 - 19968: jis0208<<14 | 0x2A<<7 | 0x18, + 24126 - 19968: jis0212<<14 | 0x1B<<7 | 0x10, + 24128 - 19968: jis0208<<14 | 0x35<<7 | 0x4B, + 24131 - 19968: jis0208<<14 | 0x35<<7 | 0x4A, + 24132 - 19968: jis0208<<14 | 0x35<<7 | 0x49, + 24133 - 19968: jis0208<<14 | 0x28<<7 | 0x5C, + 24135 - 19968: jis0208<<14 | 0x35<<7 | 0x52, + 24137 - 19968: jis0212<<14 | 0x1B<<7 | 0x13, + 24139 - 19968: jis0212<<14 | 0x1B<<7 | 0x11, + 24140 - 19968: jis0208<<14 | 0x2A<<7 | 0x39, + 24142 - 19968: jis0208<<14 | 0x35<<7 | 0x4C, + 24144 - 19968: jis0212<<14 | 0x1B<<7 | 0x12, + 24145 - 19968: jis0212<<14 | 0x1B<<7 | 0x14, + 24148 - 19968: jis0208<<14 | 0x35<<7 | 0x4E, + 24149 - 19968: jis0208<<14 | 0x2A<<7 | 0x4A, + 24150 - 19968: jis0212<<14 | 0x1B<<7 | 0x15, + 24151 - 19968: jis0208<<14 | 0x35<<7 | 0x4D, + 24152 - 19968: jis0212<<14 | 0x1B<<7 | 0x16, + 24155 - 19968: jis0212<<14 | 0x1B<<7 | 0x17, + 24156 - 19968: jis0212<<14 | 0x1B<<7 | 0x18, + 24158 - 19968: jis0212<<14 | 0x1B<<7 | 0x19, + 24159 - 19968: jis0208<<14 | 0x35<<7 | 0x4F, + 24161 - 19968: jis0208<<14 | 0x27<<7 | 0x07, + 24162 - 19968: jis0208<<14 | 0x35<<7 | 0x50, + 24163 - 19968: jis0208<<14 | 0x29<<7 | 0x1D, + 24164 - 19968: jis0208<<14 | 0x35<<7 | 0x51, + 24168 - 19968: jis0212<<14 | 0x1B<<7 | 0x1A, + 24170 - 19968: jis0212<<14 | 0x1B<<7 | 0x1B, + 24171 - 19968: jis0212<<14 | 0x1B<<7 | 0x1C, + 24172 - 19968: jis0212<<14 | 0x1B<<7 | 0x1D, + 24173 - 19968: jis0212<<14 | 0x1B<<7 | 0x1E, + 24174 - 19968: jis0212<<14 | 0x1B<<7 | 0x1F, + 24176 - 19968: jis0212<<14 | 0x1B<<7 | 0x20, + 24178 - 19968: jis0208<<14 | 0x13<<7 | 0x12, + 24179 - 19968: jis0208<<14 | 0x29<<7 | 0x1E, + 24180 - 19968: jis0208<<14 | 0x26<<7 | 0x0E, + 24181 - 19968: jis0208<<14 | 0x35<<7 | 0x53, + 24182 - 19968: jis0208<<14 | 0x35<<7 | 0x54, + 24184 - 19968: jis0208<<14 | 0x18<<7 | 0x0B, + 24185 - 19968: jis0208<<14 | 0x13<<7 | 0x13, + 24186 - 19968: jis0208<<14 | 0x35<<7 | 0x55, + 24187 - 19968: jis0208<<14 | 0x17<<7 | 0x17, + 24188 - 19968: jis0208<<14 | 0x2C<<7 | 0x23, + 24189 - 19968: jis0208<<14 | 0x2C<<7 | 0x08, + 24190 - 19968: jis0208<<14 | 0x13<<7 | 0x55, + 24191 - 19968: jis0208<<14 | 0x35<<7 | 0x57, + 24192 - 19968: jis0212<<14 | 0x1B<<7 | 0x21, + 24193 - 19968: jis0208<<14 | 0x23<<7 | 0x02, + 24195 - 19968: jis0208<<14 | 0x18<<7 | 0x0C, + 24196 - 19968: jis0208<<14 | 0x1D<<7 | 0x10, + 24199 - 19968: jis0208<<14 | 0x27<<7 | 0x3E, + 24202 - 19968: jis0208<<14 | 0x1D<<7 | 0x11, + 24203 - 19968: jis0212<<14 | 0x1B<<7 | 0x22, + 24206 - 19968: jis0212<<14 | 0x1B<<7 | 0x23, + 24207 - 19968: jis0208<<14 | 0x1C<<7 | 0x57, + 24213 - 19968: jis0208<<14 | 0x23<<7 | 0x4B, + 24214 - 19968: jis0208<<14 | 0x29<<7 | 0x58, + 24215 - 19968: jis0208<<14 | 0x24<<7 | 0x18, + 24218 - 19968: jis0208<<14 | 0x18<<7 | 0x0D, + 24220 - 19968: jis0208<<14 | 0x28<<7 | 0x3B, + 24224 - 19968: jis0208<<14 | 0x35<<7 | 0x58, + 24226 - 19968: jis0212<<14 | 0x1B<<7 | 0x24, + 24228 - 19968: jis0212<<14 | 0x1B<<7 | 0x25, + 24229 - 19968: jis0212<<14 | 0x1B<<7 | 0x26, + 24230 - 19968: jis0208<<14 | 0x24<<7 | 0x38, + 24231 - 19968: jis0208<<14 | 0x19<<7 | 0x21, + 24232 - 19968: jis0212<<14 | 0x1B<<7 | 0x27, + 24234 - 19968: jis0212<<14 | 0x1B<<7 | 0x28, + 24235 - 19968: jis0208<<14 | 0x17<<7 | 0x2A, + 24236 - 19968: jis0212<<14 | 0x1B<<7 | 0x29, + 24237 - 19968: jis0208<<14 | 0x23<<7 | 0x4C, + 24241 - 19968: jis0212<<14 | 0x1B<<7 | 0x2A, + 24243 - 19968: jis0212<<14 | 0x1B<<7 | 0x2B, + 24245 - 19968: jis0208<<14 | 0x0F<<7 | 0x22, + 24246 - 19968: jis0208<<14 | 0x1C<<7 | 0x4D, + 24247 - 19968: jis0208<<14 | 0x18<<7 | 0x0E, + 24248 - 19968: jis0208<<14 | 0x2C<<7 | 0x26, + 24253 - 19968: jis0212<<14 | 0x1B<<7 | 0x2C, + 24254 - 19968: jis0212<<14 | 0x1B<<7 | 0x2D, + 24255 - 19968: jis0212<<14 | 0x1B<<7 | 0x2E, + 24257 - 19968: jis0208<<14 | 0x35<<7 | 0x59, + 24258 - 19968: jis0208<<14 | 0x35<<7 | 0x5A, + 24259 - 19968: jis0208<<14 | 0x26<<7 | 0x30, + 24262 - 19968: jis0212<<14 | 0x1B<<7 | 0x2F, + 24264 - 19968: jis0208<<14 | 0x35<<7 | 0x5B, + 24265 - 19968: jis0208<<14 | 0x2D<<7 | 0x56, + 24266 - 19968: jis0208<<14 | 0x2E<<7 | 0x0C, + 24267 - 19968: jis0212<<14 | 0x1B<<7 | 0x31, + 24268 - 19968: jis0212<<14 | 0x1B<<7 | 0x30, + 24270 - 19968: jis0212<<14 | 0x1B<<7 | 0x32, + 24271 - 19968: jis0208<<14 | 0x35<<7 | 0x5D, + 24272 - 19968: jis0208<<14 | 0x35<<7 | 0x5C, + 24273 - 19968: jis0212<<14 | 0x1B<<7 | 0x33, + 24274 - 19968: jis0212<<14 | 0x1B<<7 | 0x34, + 24275 - 19968: jis0208<<14 | 0x12<<7 | 0x26, + 24276 - 19968: jis0212<<14 | 0x1B<<7 | 0x35, + 24277 - 19968: jis0212<<14 | 0x1B<<7 | 0x36, + 24278 - 19968: jis0208<<14 | 0x36<<7 | 0x00, + 24282 - 19968: jis0208<<14 | 0x36<<7 | 0x03, + 24283 - 19968: jis0208<<14 | 0x36<<7 | 0x04, + 24284 - 19968: jis0212<<14 | 0x1B<<7 | 0x37, + 24285 - 19968: jis0208<<14 | 0x36<<7 | 0x02, + 24286 - 19968: jis0212<<14 | 0x1B<<7 | 0x38, + 24287 - 19968: jis0208<<14 | 0x28<<7 | 0x1F, + 24288 - 19968: jis0208<<14 | 0x1D<<7 | 0x12, + 24289 - 19968: jis0208<<14 | 0x36<<7 | 0x06, + 24290 - 19968: jis0208<<14 | 0x36<<7 | 0x05, + 24291 - 19968: jis0208<<14 | 0x36<<7 | 0x01, + 24293 - 19968: jis0212<<14 | 0x1B<<7 | 0x39, + 24296 - 19968: jis0208<<14 | 0x36<<7 | 0x07, + 24297 - 19968: jis0208<<14 | 0x36<<7 | 0x08, + 24299 - 19968: jis0212<<14 | 0x1B<<7 | 0x3A, + 24300 - 19968: jis0208<<14 | 0x36<<7 | 0x09, + 24304 - 19968: jis0208<<14 | 0x36<<7 | 0x0C, + 24305 - 19968: jis0208<<14 | 0x36<<7 | 0x0A, + 24307 - 19968: jis0208<<14 | 0x36<<7 | 0x0B, + 24308 - 19968: jis0208<<14 | 0x36<<7 | 0x0D, + 24310 - 19968: jis0208<<14 | 0x10<<7 | 0x43, + 24311 - 19968: jis0208<<14 | 0x23<<7 | 0x4D, + 24312 - 19968: jis0208<<14 | 0x36<<7 | 0x0E, + 24314 - 19968: jis0208<<14 | 0x16<<7 | 0x59, + 24315 - 19968: jis0208<<14 | 0x11<<7 | 0x55, + 24316 - 19968: jis0208<<14 | 0x26<<7 | 0x15, + 24318 - 19968: jis0208<<14 | 0x36<<7 | 0x0F, + 24319 - 19968: jis0208<<14 | 0x25<<7 | 0x5A, + 24321 - 19968: jis0208<<14 | 0x29<<7 | 0x3A, + 24322 - 19968: jis0212<<14 | 0x1B<<7 | 0x3B, + 24323 - 19968: jis0208<<14 | 0x36<<7 | 0x10, + 24324 - 19968: jis0208<<14 | 0x2E<<7 | 0x0D, + 24326 - 19968: jis0212<<14 | 0x1B<<7 | 0x3C, + 24327 - 19968: jis0212<<14 | 0x1B<<7 | 0x3D, + 24328 - 19968: jis0212<<14 | 0x1B<<7 | 0x3E, + 24329 - 19968: jis0208<<14 | 0x36<<7 | 0x11, + 24330 - 19968: jis0208<<14 | 0x29<<7 | 0x1F, + 24331 - 19968: jis0208<<14 | 0x36<<7 | 0x14, + 24332 - 19968: jis0208<<14 | 0x2F<<7 | 0x00, + 24333 - 19968: jis0208<<14 | 0x2F<<7 | 0x10, + 24334 - 19968: jis0212<<14 | 0x1B<<7 | 0x3F, + 24335 - 19968: jis0208<<14 | 0x1B<<7 | 0x0F, + 24336 - 19968: jis0208<<14 | 0x25<<7 | 0x54, + 24337 - 19968: jis0208<<14 | 0x36<<7 | 0x15, + 24339 - 19968: jis0208<<14 | 0x14<<7 | 0x3C, + 24340 - 19968: jis0208<<14 | 0x23<<7 | 0x03, + 24341 - 19968: jis0208<<14 | 0x0F<<7 | 0x59, + 24342 - 19968: jis0208<<14 | 0x36<<7 | 0x16, + 24343 - 19968: jis0208<<14 | 0x29<<7 | 0x05, + 24344 - 19968: jis0208<<14 | 0x18<<7 | 0x0F, + 24345 - 19968: jis0212<<14 | 0x1B<<7 | 0x40, + 24347 - 19968: jis0208<<14 | 0x22<<7 | 0x2F, + 24348 - 19968: jis0212<<14 | 0x1B<<7 | 0x41, + 24349 - 19968: jis0212<<14 | 0x1B<<7 | 0x42, + 24351 - 19968: jis0208<<14 | 0x23<<7 | 0x4E, + 24353 - 19968: jis0208<<14 | 0x58<<7 | 0x5A, + 24354 - 19968: jis0212<<14 | 0x1B<<7 | 0x44, + 24355 - 19968: jis0212<<14 | 0x1B<<7 | 0x45, + 24356 - 19968: jis0212<<14 | 0x1B<<7 | 0x46, + 24357 - 19968: jis0208<<14 | 0x2B<<7 | 0x4E, + 24358 - 19968: jis0208<<14 | 0x17<<7 | 0x18, + 24359 - 19968: jis0208<<14 | 0x17<<7 | 0x2B, + 24360 - 19968: jis0212<<14 | 0x1B<<7 | 0x47, + 24361 - 19968: jis0208<<14 | 0x36<<7 | 0x17, + 24363 - 19968: jis0212<<14 | 0x1B<<7 | 0x48, + 24364 - 19968: jis0212<<14 | 0x1B<<7 | 0x49, + 24365 - 19968: jis0208<<14 | 0x36<<7 | 0x18, + 24366 - 19968: jis0212<<14 | 0x1B<<7 | 0x4A, + 24367 - 19968: jis0208<<14 | 0x36<<7 | 0x1E, + 24368 - 19968: jis0212<<14 | 0x1B<<7 | 0x4B, + 24369 - 19968: jis0208<<14 | 0x1B<<7 | 0x44, + 24372 - 19968: jis0208<<14 | 0x58<<7 | 0x5B, + 24373 - 19968: jis0208<<14 | 0x23<<7 | 0x04, + 24374 - 19968: jis0212<<14 | 0x1B<<7 | 0x4D, + 24375 - 19968: jis0208<<14 | 0x15<<7 | 0x0E, + 24376 - 19968: jis0208<<14 | 0x36<<7 | 0x19, + 24379 - 19968: jis0212<<14 | 0x1B<<7 | 0x4E, + 24380 - 19968: jis0208<<14 | 0x28<<7 | 0x0A, + 24381 - 19968: jis0212<<14 | 0x1B<<7 | 0x4F, + 24382 - 19968: jis0208<<14 | 0x22<<7 | 0x25, + 24383 - 19968: jis0212<<14 | 0x1B<<7 | 0x50, + 24384 - 19968: jis0212<<14 | 0x1B<<7 | 0x51, + 24385 - 19968: jis0208<<14 | 0x36<<7 | 0x1A, + 24388 - 19968: jis0212<<14 | 0x1B<<7 | 0x52, + 24389 - 19968: jis0208<<14 | 0x58<<7 | 0x0B, + 24391 - 19968: jis0212<<14 | 0x1B<<7 | 0x54, + 24392 - 19968: jis0208<<14 | 0x36<<7 | 0x1B, + 24394 - 19968: jis0208<<14 | 0x15<<7 | 0x0F, + 24396 - 19968: jis0208<<14 | 0x36<<7 | 0x1C, + 24397 - 19968: jis0212<<14 | 0x1B<<7 | 0x55, + 24398 - 19968: jis0208<<14 | 0x36<<7 | 0x1D, + 24400 - 19968: jis0212<<14 | 0x1B<<7 | 0x56, + 24401 - 19968: jis0208<<14 | 0x36<<7 | 0x1F, + 24403 - 19968: jis0208<<14 | 0x24<<7 | 0x55, + 24404 - 19968: jis0212<<14 | 0x1B<<7 | 0x57, + 24406 - 19968: jis0208<<14 | 0x36<<7 | 0x20, + 24407 - 19968: jis0208<<14 | 0x36<<7 | 0x21, + 24408 - 19968: jis0212<<14 | 0x1B<<7 | 0x58, + 24409 - 19968: jis0208<<14 | 0x36<<7 | 0x22, + 24411 - 19968: jis0212<<14 | 0x1B<<7 | 0x59, + 24412 - 19968: jis0208<<14 | 0x36<<7 | 0x13, + 24413 - 19968: jis0208<<14 | 0x36<<7 | 0x12, + 24416 - 19968: jis0212<<14 | 0x1B<<7 | 0x5A, + 24417 - 19968: jis0208<<14 | 0x36<<7 | 0x23, + 24418 - 19968: jis0208<<14 | 0x16<<7 | 0x20, + 24419 - 19968: jis0212<<14 | 0x1B<<7 | 0x5B, + 24420 - 19968: jis0212<<14 | 0x1B<<7 | 0x5C, + 24422 - 19968: jis0208<<14 | 0x28<<7 | 0x06, + 24423 - 19968: jis0208<<14 | 0x58<<7 | 0x5C, + 24425 - 19968: jis0208<<14 | 0x19<<7 | 0x2B, + 24426 - 19968: jis0208<<14 | 0x28<<7 | 0x16, + 24427 - 19968: jis0208<<14 | 0x23<<7 | 0x05, + 24428 - 19968: jis0208<<14 | 0x28<<7 | 0x2A, + 24429 - 19968: jis0208<<14 | 0x36<<7 | 0x24, + 24431 - 19968: jis0212<<14 | 0x1C<<7 | 0x00, + 24432 - 19968: jis0208<<14 | 0x1D<<7 | 0x13, + 24433 - 19968: jis0208<<14 | 0x10<<7 | 0x25, + 24434 - 19968: jis0212<<14 | 0x1C<<7 | 0x01, + 24435 - 19968: jis0208<<14 | 0x36<<7 | 0x25, + 24436 - 19968: jis0212<<14 | 0x1C<<7 | 0x02, + 24437 - 19968: jis0212<<14 | 0x1C<<7 | 0x03, + 24439 - 19968: jis0208<<14 | 0x36<<7 | 0x26, + 24440 - 19968: jis0212<<14 | 0x1C<<7 | 0x04, + 24441 - 19968: jis0208<<14 | 0x2B<<7 | 0x51, + 24442 - 19968: jis0212<<14 | 0x1C<<7 | 0x05, + 24444 - 19968: jis0208<<14 | 0x27<<7 | 0x3F, + 24445 - 19968: jis0212<<14 | 0x1C<<7 | 0x06, + 24446 - 19968: jis0212<<14 | 0x1C<<7 | 0x07, + 24447 - 19968: jis0208<<14 | 0x36<<7 | 0x29, + 24448 - 19968: jis0208<<14 | 0x10<<7 | 0x5C, + 24449 - 19968: jis0208<<14 | 0x1F<<7 | 0x0B, + 24450 - 19968: jis0208<<14 | 0x36<<7 | 0x28, + 24451 - 19968: jis0208<<14 | 0x36<<7 | 0x27, + 24452 - 19968: jis0208<<14 | 0x16<<7 | 0x21, + 24453 - 19968: jis0208<<14 | 0x21<<7 | 0x33, + 24455 - 19968: jis0208<<14 | 0x36<<7 | 0x2D, + 24456 - 19968: jis0208<<14 | 0x36<<7 | 0x2B, + 24457 - 19968: jis0212<<14 | 0x1C<<7 | 0x08, + 24458 - 19968: jis0208<<14 | 0x36<<7 | 0x2A, + 24459 - 19968: jis0208<<14 | 0x2D<<7 | 0x06, + 24460 - 19968: jis0208<<14 | 0x17<<7 | 0x44, + 24461 - 19968: jis0212<<14 | 0x1C<<7 | 0x09, + 24463 - 19968: jis0212<<14 | 0x1C<<7 | 0x0A, + 24464 - 19968: jis0208<<14 | 0x1C<<7 | 0x58, + 24465 - 19968: jis0208<<14 | 0x36<<7 | 0x2C, + 24466 - 19968: jis0208<<14 | 0x24<<7 | 0x2B, + 24467 - 19968: jis0208<<14 | 0x1C<<7 | 0x1D, + 24470 - 19968: jis0212<<14 | 0x1C<<7 | 0x0B, + 24471 - 19968: jis0208<<14 | 0x25<<7 | 0x1F, + 24472 - 19968: jis0208<<14 | 0x36<<7 | 0x30, + 24473 - 19968: jis0208<<14 | 0x36<<7 | 0x2F, + 24476 - 19968: jis0212<<14 | 0x1C<<7 | 0x0C, + 24477 - 19968: jis0212<<14 | 0x1C<<7 | 0x0D, + 24478 - 19968: jis0208<<14 | 0x36<<7 | 0x2E, + 24480 - 19968: jis0208<<14 | 0x36<<7 | 0x31, + 24481 - 19968: jis0208<<14 | 0x17<<7 | 0x45, + 24482 - 19968: jis0212<<14 | 0x1C<<7 | 0x0E, + 24484 - 19968: jis0212<<14 | 0x1C<<7 | 0x11, + 24487 - 19968: jis0212<<14 | 0x1C<<7 | 0x0F, + 24488 - 19968: jis0208<<14 | 0x36<<7 | 0x32, + 24489 - 19968: jis0208<<14 | 0x28<<7 | 0x5B, + 24490 - 19968: jis0208<<14 | 0x1C<<7 | 0x3A, + 24491 - 19968: jis0212<<14 | 0x1C<<7 | 0x10, + 24492 - 19968: jis0212<<14 | 0x1C<<7 | 0x12, + 24493 - 19968: jis0208<<14 | 0x36<<7 | 0x33, + 24494 - 19968: jis0208<<14 | 0x27<<7 | 0x58, + 24495 - 19968: jis0212<<14 | 0x1C<<7 | 0x13, + 24496 - 19968: jis0212<<14 | 0x1C<<7 | 0x14, + 24497 - 19968: jis0212<<14 | 0x1C<<7 | 0x15, + 24499 - 19968: jis0208<<14 | 0x25<<7 | 0x20, + 24500 - 19968: jis0208<<14 | 0x23<<7 | 0x06, + 24503 - 19968: jis0208<<14 | 0x58<<7 | 0x5D, + 24504 - 19968: jis0212<<14 | 0x1C<<7 | 0x16, + 24505 - 19968: jis0208<<14 | 0x24<<7 | 0x0F, + 24508 - 19968: jis0208<<14 | 0x36<<7 | 0x34, + 24509 - 19968: jis0208<<14 | 0x14<<7 | 0x0A, + 24515 - 19968: jis0208<<14 | 0x1E<<7 | 0x13, + 24516 - 19968: jis0212<<14 | 0x1C<<7 | 0x17, + 24517 - 19968: jis0208<<14 | 0x28<<7 | 0x0B, + 24519 - 19968: jis0212<<14 | 0x1C<<7 | 0x18, + 24520 - 19968: jis0212<<14 | 0x1C<<7 | 0x19, + 24521 - 19968: jis0212<<14 | 0x1C<<7 | 0x1A, + 24523 - 19968: jis0212<<14 | 0x1C<<7 | 0x1B, + 24524 - 19968: jis0208<<14 | 0x13<<7 | 0x56, + 24525 - 19968: jis0208<<14 | 0x26<<7 | 0x05, + 24528 - 19968: jis0212<<14 | 0x1C<<7 | 0x1C, + 24529 - 19968: jis0212<<14 | 0x1C<<7 | 0x1D, + 24530 - 19968: jis0212<<14 | 0x1C<<7 | 0x1E, + 24531 - 19968: jis0212<<14 | 0x1C<<7 | 0x1F, + 24532 - 19968: jis0212<<14 | 0x1C<<7 | 0x20, + 24534 - 19968: jis0208<<14 | 0x36<<7 | 0x35, + 24535 - 19968: jis0208<<14 | 0x1A<<7 | 0x35, + 24536 - 19968: jis0208<<14 | 0x2A<<7 | 0x19, + 24537 - 19968: jis0208<<14 | 0x2A<<7 | 0x1A, + 24540 - 19968: jis0208<<14 | 0x10<<7 | 0x5D, + 24541 - 19968: jis0208<<14 | 0x36<<7 | 0x3A, + 24542 - 19968: jis0208<<14 | 0x59<<7 | 0x00, + 24544 - 19968: jis0208<<14 | 0x22<<7 | 0x48, + 24545 - 19968: jis0212<<14 | 0x1C<<7 | 0x22, + 24546 - 19968: jis0212<<14 | 0x1C<<7 | 0x23, + 24548 - 19968: jis0208<<14 | 0x36<<7 | 0x37, + 24552 - 19968: jis0212<<14 | 0x1C<<7 | 0x24, + 24553 - 19968: jis0212<<14 | 0x1C<<7 | 0x25, + 24554 - 19968: jis0212<<14 | 0x1C<<7 | 0x26, + 24555 - 19968: jis0208<<14 | 0x11<<7 | 0x56, + 24556 - 19968: jis0212<<14 | 0x1C<<7 | 0x27, + 24557 - 19968: jis0212<<14 | 0x1C<<7 | 0x28, + 24558 - 19968: jis0212<<14 | 0x1C<<7 | 0x29, + 24559 - 19968: jis0212<<14 | 0x1C<<7 | 0x2A, + 24560 - 19968: jis0208<<14 | 0x37<<7 | 0x0C, + 24561 - 19968: jis0208<<14 | 0x36<<7 | 0x39, + 24562 - 19968: jis0212<<14 | 0x1C<<7 | 0x2B, + 24563 - 19968: jis0212<<14 | 0x1C<<7 | 0x2C, + 24565 - 19968: jis0208<<14 | 0x26<<7 | 0x0F, + 24566 - 19968: jis0212<<14 | 0x1C<<7 | 0x2D, + 24568 - 19968: jis0208<<14 | 0x36<<7 | 0x38, + 24570 - 19968: jis0212<<14 | 0x1C<<7 | 0x2E, + 24571 - 19968: jis0208<<14 | 0x36<<7 | 0x36, + 24572 - 19968: jis0212<<14 | 0x1C<<7 | 0x2F, + 24573 - 19968: jis0208<<14 | 0x18<<7 | 0x59, + 24575 - 19968: jis0208<<14 | 0x36<<7 | 0x3C, + 24583 - 19968: jis0212<<14 | 0x1C<<7 | 0x30, + 24586 - 19968: jis0212<<14 | 0x1C<<7 | 0x31, + 24589 - 19968: jis0212<<14 | 0x1C<<7 | 0x32, + 24590 - 19968: jis0208<<14 | 0x36<<7 | 0x42, + 24591 - 19968: jis0208<<14 | 0x36<<7 | 0x48, + 24592 - 19968: jis0208<<14 | 0x36<<7 | 0x40, + 24594 - 19968: jis0208<<14 | 0x24<<7 | 0x3B, + 24595 - 19968: jis0212<<14 | 0x1C<<7 | 0x33, + 24596 - 19968: jis0212<<14 | 0x1C<<7 | 0x34, + 24597 - 19968: jis0208<<14 | 0x36<<7 | 0x45, + 24598 - 19968: jis0208<<14 | 0x28<<7 | 0x3C, + 24599 - 19968: jis0212<<14 | 0x1C<<7 | 0x35, + 24600 - 19968: jis0212<<14 | 0x1C<<7 | 0x36, + 24601 - 19968: jis0208<<14 | 0x36<<7 | 0x3F, + 24602 - 19968: jis0212<<14 | 0x1C<<7 | 0x37, + 24603 - 19968: jis0208<<14 | 0x36<<7 | 0x44, + 24604 - 19968: jis0208<<14 | 0x2D<<7 | 0x46, + 24605 - 19968: jis0208<<14 | 0x1A<<7 | 0x36, + 24607 - 19968: jis0212<<14 | 0x1C<<7 | 0x38, + 24608 - 19968: jis0208<<14 | 0x21<<7 | 0x34, + 24609 - 19968: jis0208<<14 | 0x36<<7 | 0x3D, + 24612 - 19968: jis0212<<14 | 0x1C<<7 | 0x39, + 24613 - 19968: jis0208<<14 | 0x14<<7 | 0x3D, + 24614 - 19968: jis0208<<14 | 0x36<<7 | 0x47, + 24615 - 19968: jis0208<<14 | 0x1F<<7 | 0x0C, + 24616 - 19968: jis0208<<14 | 0x10<<7 | 0x44, + 24617 - 19968: jis0208<<14 | 0x36<<7 | 0x41, + 24618 - 19968: jis0208<<14 | 0x11<<7 | 0x57, + 24619 - 19968: jis0208<<14 | 0x36<<7 | 0x46, + 24621 - 19968: jis0212<<14 | 0x1C<<7 | 0x3A, + 24623 - 19968: jis0208<<14 | 0x15<<7 | 0x10, + 24625 - 19968: jis0208<<14 | 0x36<<7 | 0x43, + 24627 - 19968: jis0212<<14 | 0x1C<<7 | 0x3B, + 24629 - 19968: jis0212<<14 | 0x1C<<7 | 0x3C, + 24634 - 19968: jis0208<<14 | 0x36<<7 | 0x49, + 24640 - 19968: jis0212<<14 | 0x1C<<7 | 0x3D, + 24641 - 19968: jis0208<<14 | 0x36<<7 | 0x4B, + 24642 - 19968: jis0208<<14 | 0x36<<7 | 0x55, + 24643 - 19968: jis0208<<14 | 0x36<<7 | 0x53, + 24646 - 19968: jis0208<<14 | 0x36<<7 | 0x50, + 24647 - 19968: jis0212<<14 | 0x1C<<7 | 0x3E, + 24648 - 19968: jis0212<<14 | 0x1C<<7 | 0x3F, + 24649 - 19968: jis0212<<14 | 0x1C<<7 | 0x40, + 24650 - 19968: jis0208<<14 | 0x36<<7 | 0x4F, + 24651 - 19968: jis0208<<14 | 0x2D<<7 | 0x57, + 24652 - 19968: jis0212<<14 | 0x1C<<7 | 0x41, + 24653 - 19968: jis0208<<14 | 0x36<<7 | 0x51, + 24656 - 19968: jis0208<<14 | 0x15<<7 | 0x11, + 24657 - 19968: jis0212<<14 | 0x1C<<7 | 0x42, + 24658 - 19968: jis0208<<14 | 0x18<<7 | 0x10, + 24660 - 19968: jis0212<<14 | 0x1C<<7 | 0x43, + 24661 - 19968: jis0208<<14 | 0x1C<<7 | 0x59, + 24662 - 19968: jis0212<<14 | 0x1C<<7 | 0x44, + 24663 - 19968: jis0212<<14 | 0x1C<<7 | 0x45, + 24665 - 19968: jis0208<<14 | 0x36<<7 | 0x58, + 24666 - 19968: jis0208<<14 | 0x36<<7 | 0x4A, + 24669 - 19968: jis0208<<14 | 0x59<<7 | 0x01, + 24671 - 19968: jis0208<<14 | 0x36<<7 | 0x4E, + 24672 - 19968: jis0208<<14 | 0x36<<7 | 0x3E, + 24673 - 19968: jis0212<<14 | 0x1C<<7 | 0x47, + 24674 - 19968: jis0208<<14 | 0x11<<7 | 0x59, + 24675 - 19968: jis0208<<14 | 0x36<<7 | 0x52, + 24676 - 19968: jis0208<<14 | 0x36<<7 | 0x54, + 24677 - 19968: jis0208<<14 | 0x22<<7 | 0x30, + 24679 - 19968: jis0212<<14 | 0x1C<<7 | 0x48, + 24680 - 19968: jis0208<<14 | 0x19<<7 | 0x07, + 24681 - 19968: jis0208<<14 | 0x11<<7 | 0x17, + 24682 - 19968: jis0208<<14 | 0x36<<7 | 0x4C, + 24683 - 19968: jis0208<<14 | 0x36<<7 | 0x57, + 24684 - 19968: jis0208<<14 | 0x36<<7 | 0x56, + 24685 - 19968: jis0208<<14 | 0x15<<7 | 0x12, + 24687 - 19968: jis0208<<14 | 0x21<<7 | 0x08, + 24688 - 19968: jis0208<<14 | 0x12<<7 | 0x45, + 24689 - 19968: jis0212<<14 | 0x1C<<7 | 0x49, + 24693 - 19968: jis0208<<14 | 0x16<<7 | 0x22, + 24695 - 19968: jis0208<<14 | 0x36<<7 | 0x4D, + 24702 - 19968: jis0212<<14 | 0x1C<<7 | 0x4A, + 24703 - 19968: jis0212<<14 | 0x1C<<7 | 0x4B, + 24705 - 19968: jis0208<<14 | 0x36<<7 | 0x59, + 24706 - 19968: jis0212<<14 | 0x1C<<7 | 0x4C, + 24707 - 19968: jis0208<<14 | 0x36<<7 | 0x5C, + 24708 - 19968: jis0208<<14 | 0x37<<7 | 0x00, + 24709 - 19968: jis0208<<14 | 0x59<<7 | 0x02, + 24710 - 19968: jis0212<<14 | 0x1C<<7 | 0x4D, + 24712 - 19968: jis0212<<14 | 0x1C<<7 | 0x4E, + 24713 - 19968: jis0208<<14 | 0x1B<<7 | 0x1C, + 24714 - 19968: jis0208<<14 | 0x59<<7 | 0x03, + 24715 - 19968: jis0208<<14 | 0x37<<7 | 0x06, + 24716 - 19968: jis0208<<14 | 0x23<<7 | 0x4F, + 24717 - 19968: jis0208<<14 | 0x36<<7 | 0x5A, + 24718 - 19968: jis0212<<14 | 0x1C<<7 | 0x50, + 24721 - 19968: jis0212<<14 | 0x1C<<7 | 0x51, + 24722 - 19968: jis0208<<14 | 0x37<<7 | 0x04, + 24723 - 19968: jis0212<<14 | 0x1C<<7 | 0x52, + 24724 - 19968: jis0208<<14 | 0x11<<7 | 0x58, + 24725 - 19968: jis0212<<14 | 0x1C<<7 | 0x53, + 24726 - 19968: jis0208<<14 | 0x37<<7 | 0x02, + 24727 - 19968: jis0208<<14 | 0x37<<7 | 0x03, + 24728 - 19968: jis0212<<14 | 0x1C<<7 | 0x54, + 24730 - 19968: jis0208<<14 | 0x36<<7 | 0x5D, + 24731 - 19968: jis0208<<14 | 0x37<<7 | 0x01, + 24733 - 19968: jis0212<<14 | 0x1C<<7 | 0x55, + 24734 - 19968: jis0212<<14 | 0x1C<<7 | 0x56, + 24735 - 19968: jis0208<<14 | 0x17<<7 | 0x46, + 24736 - 19968: jis0208<<14 | 0x2C<<7 | 0x09, + 24738 - 19968: jis0212<<14 | 0x1C<<7 | 0x57, + 24739 - 19968: jis0208<<14 | 0x13<<7 | 0x14, + 24740 - 19968: jis0212<<14 | 0x1C<<7 | 0x58, + 24741 - 19968: jis0212<<14 | 0x1C<<7 | 0x59, + 24742 - 19968: jis0208<<14 | 0x10<<7 | 0x38, + 24743 - 19968: jis0208<<14 | 0x37<<7 | 0x05, + 24744 - 19968: jis0212<<14 | 0x1C<<7 | 0x5A, + 24745 - 19968: jis0208<<14 | 0x26<<7 | 0x19, + 24746 - 19968: jis0208<<14 | 0x0F<<7 | 0x0C, + 24752 - 19968: jis0212<<14 | 0x1C<<7 | 0x5B, + 24753 - 19968: jis0212<<14 | 0x1C<<7 | 0x5C, + 24754 - 19968: jis0208<<14 | 0x27<<7 | 0x40, + 24755 - 19968: jis0208<<14 | 0x36<<7 | 0x3B, + 24756 - 19968: jis0208<<14 | 0x37<<7 | 0x0B, + 24757 - 19968: jis0208<<14 | 0x37<<7 | 0x0F, + 24758 - 19968: jis0208<<14 | 0x2B<<7 | 0x44, + 24759 - 19968: jis0212<<14 | 0x1C<<7 | 0x5D, + 24760 - 19968: jis0208<<14 | 0x37<<7 | 0x08, + 24763 - 19968: jis0212<<14 | 0x1D<<7 | 0x00, + 24764 - 19968: jis0208<<14 | 0x24<<7 | 0x48, + 24765 - 19968: jis0208<<14 | 0x37<<7 | 0x0D, + 24766 - 19968: jis0212<<14 | 0x1D<<7 | 0x01, + 24770 - 19968: jis0212<<14 | 0x1D<<7 | 0x02, + 24772 - 19968: jis0212<<14 | 0x1D<<7 | 0x03, + 24773 - 19968: jis0208<<14 | 0x1D<<7 | 0x4F, + 24774 - 19968: jis0208<<14 | 0x37<<7 | 0x0E, + 24775 - 19968: jis0208<<14 | 0x25<<7 | 0x36, + 24776 - 19968: jis0212<<14 | 0x1D<<7 | 0x04, + 24777 - 19968: jis0212<<14 | 0x1D<<7 | 0x05, + 24778 - 19968: jis0212<<14 | 0x1D<<7 | 0x06, + 24779 - 19968: jis0212<<14 | 0x1D<<7 | 0x07, + 24782 - 19968: jis0212<<14 | 0x1D<<7 | 0x08, + 24783 - 19968: jis0212<<14 | 0x1D<<7 | 0x09, + 24785 - 19968: jis0208<<14 | 0x2E<<7 | 0x26, + 24787 - 19968: jis0208<<14 | 0x37<<7 | 0x0A, + 24788 - 19968: jis0212<<14 | 0x1D<<7 | 0x0A, + 24789 - 19968: jis0208<<14 | 0x59<<7 | 0x05, + 24792 - 19968: jis0208<<14 | 0x37<<7 | 0x10, + 24793 - 19968: jis0212<<14 | 0x1D<<7 | 0x0C, + 24794 - 19968: jis0208<<14 | 0x18<<7 | 0x5A, + 24795 - 19968: jis0212<<14 | 0x1D<<7 | 0x0D, + 24796 - 19968: jis0208<<14 | 0x1F<<7 | 0x2A, + 24797 - 19968: jis0212<<14 | 0x1D<<7 | 0x0E, + 24798 - 19968: jis0208<<14 | 0x59<<7 | 0x04, + 24799 - 19968: jis0208<<14 | 0x0F<<7 | 0x33, + 24800 - 19968: jis0208<<14 | 0x37<<7 | 0x09, + 24801 - 19968: jis0208<<14 | 0x37<<7 | 0x07, + 24802 - 19968: jis0212<<14 | 0x1D<<7 | 0x10, + 24803 - 19968: jis0208<<14 | 0x20<<7 | 0x39, + 24805 - 19968: jis0212<<14 | 0x1D<<7 | 0x11, + 24807 - 19968: jis0208<<14 | 0x36<<7 | 0x5B, + 24808 - 19968: jis0208<<14 | 0x1A<<7 | 0x13, + 24816 - 19968: jis0208<<14 | 0x21<<7 | 0x25, + 24817 - 19968: jis0208<<14 | 0x37<<7 | 0x1C, + 24818 - 19968: jis0208<<14 | 0x59<<7 | 0x07, + 24819 - 19968: jis0208<<14 | 0x20<<7 | 0x3A, + 24820 - 19968: jis0208<<14 | 0x37<<7 | 0x17, + 24821 - 19968: jis0212<<14 | 0x1D<<7 | 0x13, + 24822 - 19968: jis0208<<14 | 0x37<<7 | 0x14, + 24823 - 19968: jis0208<<14 | 0x37<<7 | 0x15, + 24824 - 19968: jis0212<<14 | 0x1D<<7 | 0x14, + 24825 - 19968: jis0208<<14 | 0x1B<<7 | 0x45, + 24826 - 19968: jis0208<<14 | 0x37<<7 | 0x18, + 24827 - 19968: jis0208<<14 | 0x37<<7 | 0x1B, + 24828 - 19968: jis0212<<14 | 0x1D<<7 | 0x15, + 24829 - 19968: jis0212<<14 | 0x1D<<7 | 0x16, + 24832 - 19968: jis0208<<14 | 0x37<<7 | 0x16, + 24833 - 19968: jis0208<<14 | 0x1C<<7 | 0x04, + 24834 - 19968: jis0212<<14 | 0x1D<<7 | 0x17, + 24835 - 19968: jis0208<<14 | 0x37<<7 | 0x19, + 24838 - 19968: jis0208<<14 | 0x37<<7 | 0x13, + 24839 - 19968: jis0212<<14 | 0x1D<<7 | 0x18, + 24840 - 19968: jis0208<<14 | 0x2B<<7 | 0x5B, + 24841 - 19968: jis0208<<14 | 0x2B<<7 | 0x5A, + 24842 - 19968: jis0212<<14 | 0x1D<<7 | 0x19, + 24844 - 19968: jis0212<<14 | 0x1D<<7 | 0x1A, + 24845 - 19968: jis0208<<14 | 0x37<<7 | 0x1D, + 24846 - 19968: jis0208<<14 | 0x37<<7 | 0x1E, + 24847 - 19968: jis0208<<14 | 0x0F<<7 | 0x34, + 24848 - 19968: jis0212<<14 | 0x1D<<7 | 0x1B, + 24849 - 19968: jis0208<<14 | 0x59<<7 | 0x08, + 24850 - 19968: jis0212<<14 | 0x1D<<7 | 0x1D, + 24851 - 19968: jis0212<<14 | 0x1D<<7 | 0x1E, + 24852 - 19968: jis0212<<14 | 0x1D<<7 | 0x1F, + 24853 - 19968: jis0208<<14 | 0x37<<7 | 0x12, + 24854 - 19968: jis0212<<14 | 0x1D<<7 | 0x20, + 24855 - 19968: jis0212<<14 | 0x1D<<7 | 0x21, + 24857 - 19968: jis0212<<14 | 0x1D<<7 | 0x22, + 24858 - 19968: jis0208<<14 | 0x15<<7 | 0x51, + 24859 - 19968: jis0208<<14 | 0x0F<<7 | 0x05, + 24860 - 19968: jis0212<<14 | 0x1D<<7 | 0x23, + 24862 - 19968: jis0212<<14 | 0x1D<<7 | 0x24, + 24863 - 19968: jis0208<<14 | 0x13<<7 | 0x15, + 24864 - 19968: jis0208<<14 | 0x59<<7 | 0x06, + 24865 - 19968: jis0208<<14 | 0x37<<7 | 0x1A, + 24866 - 19968: jis0212<<14 | 0x1D<<7 | 0x25, + 24871 - 19968: jis0208<<14 | 0x37<<7 | 0x22, + 24872 - 19968: jis0208<<14 | 0x37<<7 | 0x21, + 24874 - 19968: jis0212<<14 | 0x1D<<7 | 0x26, + 24875 - 19968: jis0212<<14 | 0x1D<<7 | 0x27, + 24876 - 19968: jis0208<<14 | 0x37<<7 | 0x26, + 24880 - 19968: jis0208<<14 | 0x59<<7 | 0x0A, + 24881 - 19968: jis0212<<14 | 0x1D<<7 | 0x29, + 24884 - 19968: jis0208<<14 | 0x37<<7 | 0x27, + 24885 - 19968: jis0212<<14 | 0x1D<<7 | 0x2A, + 24886 - 19968: jis0212<<14 | 0x1D<<7 | 0x2B, + 24887 - 19968: jis0208<<14 | 0x59<<7 | 0x09, + 24889 - 19968: jis0212<<14 | 0x1D<<7 | 0x2D, + 24892 - 19968: jis0208<<14 | 0x37<<7 | 0x25, + 24893 - 19968: jis0208<<14 | 0x37<<7 | 0x28, + 24894 - 19968: jis0208<<14 | 0x37<<7 | 0x20, + 24895 - 19968: jis0208<<14 | 0x37<<7 | 0x24, + 24897 - 19968: jis0212<<14 | 0x1D<<7 | 0x2E, + 24898 - 19968: jis0208<<14 | 0x37<<7 | 0x29, + 24900 - 19968: jis0208<<14 | 0x37<<7 | 0x2A, + 24901 - 19968: jis0212<<14 | 0x1D<<7 | 0x2F, + 24902 - 19968: jis0212<<14 | 0x1D<<7 | 0x30, + 24903 - 19968: jis0208<<14 | 0x37<<7 | 0x1F, + 24904 - 19968: jis0208<<14 | 0x1A<<7 | 0x5B, + 24905 - 19968: jis0212<<14 | 0x1D<<7 | 0x31, + 24906 - 19968: jis0208<<14 | 0x37<<7 | 0x23, + 24907 - 19968: jis0208<<14 | 0x21<<7 | 0x35, + 24908 - 19968: jis0208<<14 | 0x18<<7 | 0x11, + 24909 - 19968: jis0208<<14 | 0x37<<7 | 0x11, + 24910 - 19968: jis0208<<14 | 0x1E<<7 | 0x14, + 24915 - 19968: jis0208<<14 | 0x37<<7 | 0x37, + 24917 - 19968: jis0208<<14 | 0x29<<7 | 0x48, + 24920 - 19968: jis0208<<14 | 0x37<<7 | 0x2D, + 24921 - 19968: jis0208<<14 | 0x37<<7 | 0x2E, + 24922 - 19968: jis0208<<14 | 0x37<<7 | 0x2F, + 24925 - 19968: jis0208<<14 | 0x37<<7 | 0x36, + 24926 - 19968: jis0212<<14 | 0x1D<<7 | 0x32, + 24927 - 19968: jis0208<<14 | 0x37<<7 | 0x35, + 24928 - 19968: jis0212<<14 | 0x1D<<7 | 0x33, + 24930 - 19968: jis0208<<14 | 0x2A<<7 | 0x5C, + 24931 - 19968: jis0208<<14 | 0x13<<7 | 0x16, + 24933 - 19968: jis0208<<14 | 0x37<<7 | 0x33, + 24935 - 19968: jis0208<<14 | 0x16<<7 | 0x24, + 24936 - 19968: jis0208<<14 | 0x12<<7 | 0x13, + 24939 - 19968: jis0208<<14 | 0x37<<7 | 0x30, + 24940 - 19968: jis0212<<14 | 0x1D<<7 | 0x34, + 24942 - 19968: jis0208<<14 | 0x2D<<7 | 0x17, + 24943 - 19968: jis0208<<14 | 0x37<<7 | 0x32, + 24944 - 19968: jis0208<<14 | 0x0F<<7 | 0x35, + 24945 - 19968: jis0208<<14 | 0x37<<7 | 0x34, + 24946 - 19968: jis0212<<14 | 0x1D<<7 | 0x35, + 24947 - 19968: jis0208<<14 | 0x37<<7 | 0x2B, + 24948 - 19968: jis0208<<14 | 0x37<<7 | 0x31, + 24949 - 19968: jis0208<<14 | 0x37<<7 | 0x38, + 24950 - 19968: jis0208<<14 | 0x16<<7 | 0x23, + 24951 - 19968: jis0208<<14 | 0x37<<7 | 0x2C, + 24952 - 19968: jis0212<<14 | 0x1D<<7 | 0x36, + 24955 - 19968: jis0212<<14 | 0x1D<<7 | 0x37, + 24956 - 19968: jis0212<<14 | 0x1D<<7 | 0x38, + 24958 - 19968: jis0208<<14 | 0x2C<<7 | 0x3C, + 24959 - 19968: jis0212<<14 | 0x1D<<7 | 0x39, + 24960 - 19968: jis0212<<14 | 0x1D<<7 | 0x3A, + 24961 - 19968: jis0212<<14 | 0x1D<<7 | 0x3B, + 24962 - 19968: jis0208<<14 | 0x2C<<7 | 0x0A, + 24963 - 19968: jis0212<<14 | 0x1D<<7 | 0x3C, + 24964 - 19968: jis0212<<14 | 0x1D<<7 | 0x3D, + 24967 - 19968: jis0208<<14 | 0x37<<7 | 0x3B, + 24970 - 19968: jis0208<<14 | 0x37<<7 | 0x3F, + 24971 - 19968: jis0212<<14 | 0x1D<<7 | 0x3E, + 24973 - 19968: jis0212<<14 | 0x1D<<7 | 0x3F, + 24974 - 19968: jis0208<<14 | 0x20<<7 | 0x5D, + 24976 - 19968: jis0208<<14 | 0x2D<<7 | 0x58, + 24977 - 19968: jis0208<<14 | 0x37<<7 | 0x40, + 24978 - 19968: jis0212<<14 | 0x1D<<7 | 0x40, + 24979 - 19968: jis0212<<14 | 0x1D<<7 | 0x41, + 24980 - 19968: jis0208<<14 | 0x37<<7 | 0x3D, + 24982 - 19968: jis0208<<14 | 0x37<<7 | 0x3A, + 24983 - 19968: jis0212<<14 | 0x1D<<7 | 0x42, + 24984 - 19968: jis0208<<14 | 0x59<<7 | 0x0B, + 24985 - 19968: jis0208<<14 | 0x37<<7 | 0x39, + 24986 - 19968: jis0208<<14 | 0x37<<7 | 0x3E, + 24988 - 19968: jis0212<<14 | 0x1D<<7 | 0x44, + 24989 - 19968: jis0212<<14 | 0x1D<<7 | 0x45, + 24991 - 19968: jis0212<<14 | 0x1D<<7 | 0x46, + 24992 - 19968: jis0212<<14 | 0x1D<<7 | 0x47, + 24996 - 19968: jis0208<<14 | 0x29<<7 | 0x0F, + 24997 - 19968: jis0212<<14 | 0x1D<<7 | 0x48, + 24999 - 19968: jis0208<<14 | 0x25<<7 | 0x13, + 25000 - 19968: jis0212<<14 | 0x1D<<7 | 0x49, + 25001 - 19968: jis0208<<14 | 0x16<<7 | 0x25, + 25002 - 19968: jis0212<<14 | 0x1D<<7 | 0x4A, + 25003 - 19968: jis0208<<14 | 0x37<<7 | 0x41, + 25004 - 19968: jis0208<<14 | 0x37<<7 | 0x3C, + 25005 - 19968: jis0212<<14 | 0x1D<<7 | 0x4B, + 25006 - 19968: jis0208<<14 | 0x37<<7 | 0x42, + 25010 - 19968: jis0208<<14 | 0x16<<7 | 0x5A, + 25014 - 19968: jis0208<<14 | 0x11<<7 | 0x10, + 25016 - 19968: jis0212<<14 | 0x1D<<7 | 0x4C, + 25017 - 19968: jis0212<<14 | 0x1D<<7 | 0x4D, + 25018 - 19968: jis0208<<14 | 0x37<<7 | 0x4A, + 25020 - 19968: jis0212<<14 | 0x1D<<7 | 0x4E, + 25022 - 19968: jis0208<<14 | 0x13<<7 | 0x17, + 25024 - 19968: jis0212<<14 | 0x1D<<7 | 0x4F, + 25025 - 19968: jis0212<<14 | 0x1D<<7 | 0x50, + 25026 - 19968: jis0212<<14 | 0x1D<<7 | 0x51, + 25027 - 19968: jis0208<<14 | 0x37<<7 | 0x48, + 25030 - 19968: jis0208<<14 | 0x37<<7 | 0x49, + 25031 - 19968: jis0208<<14 | 0x19<<7 | 0x08, + 25032 - 19968: jis0208<<14 | 0x37<<7 | 0x47, + 25033 - 19968: jis0208<<14 | 0x37<<7 | 0x45, + 25034 - 19968: jis0208<<14 | 0x37<<7 | 0x44, + 25035 - 19968: jis0208<<14 | 0x37<<7 | 0x4B, + 25036 - 19968: jis0208<<14 | 0x37<<7 | 0x43, + 25037 - 19968: jis0208<<14 | 0x37<<7 | 0x4D, + 25038 - 19968: jis0212<<14 | 0x1D<<7 | 0x52, + 25039 - 19968: jis0212<<14 | 0x1D<<7 | 0x53, + 25040 - 19968: jis0208<<14 | 0x11<<7 | 0x5A, + 25045 - 19968: jis0212<<14 | 0x1D<<7 | 0x54, + 25052 - 19968: jis0212<<14 | 0x1D<<7 | 0x55, + 25053 - 19968: jis0212<<14 | 0x1D<<7 | 0x56, + 25054 - 19968: jis0212<<14 | 0x1D<<7 | 0x57, + 25055 - 19968: jis0212<<14 | 0x1D<<7 | 0x58, + 25057 - 19968: jis0212<<14 | 0x1D<<7 | 0x59, + 25058 - 19968: jis0212<<14 | 0x1D<<7 | 0x5A, + 25059 - 19968: jis0208<<14 | 0x37<<7 | 0x4F, + 25061 - 19968: jis0212<<14 | 0x1D<<7 | 0x5D, + 25062 - 19968: jis0208<<14 | 0x37<<7 | 0x4E, + 25063 - 19968: jis0212<<14 | 0x1D<<7 | 0x5B, + 25065 - 19968: jis0212<<14 | 0x1D<<7 | 0x5C, + 25068 - 19968: jis0212<<14 | 0x1E<<7 | 0x00, + 25069 - 19968: jis0212<<14 | 0x1E<<7 | 0x01, + 25071 - 19968: jis0212<<14 | 0x1E<<7 | 0x02, + 25074 - 19968: jis0208<<14 | 0x23<<7 | 0x07, + 25076 - 19968: jis0208<<14 | 0x37<<7 | 0x52, + 25078 - 19968: jis0208<<14 | 0x37<<7 | 0x50, + 25079 - 19968: jis0208<<14 | 0x37<<7 | 0x46, + 25080 - 19968: jis0208<<14 | 0x16<<7 | 0x5B, + 25082 - 19968: jis0208<<14 | 0x37<<7 | 0x51, + 25084 - 19968: jis0208<<14 | 0x37<<7 | 0x55, + 25085 - 19968: jis0208<<14 | 0x37<<7 | 0x54, + 25086 - 19968: jis0208<<14 | 0x37<<7 | 0x56, + 25087 - 19968: jis0208<<14 | 0x37<<7 | 0x53, + 25088 - 19968: jis0208<<14 | 0x37<<7 | 0x57, + 25089 - 19968: jis0212<<14 | 0x1E<<7 | 0x03, + 25091 - 19968: jis0212<<14 | 0x1E<<7 | 0x04, + 25092 - 19968: jis0212<<14 | 0x1E<<7 | 0x05, + 25095 - 19968: jis0212<<14 | 0x1E<<7 | 0x06, + 25096 - 19968: jis0208<<14 | 0x37<<7 | 0x58, + 25097 - 19968: jis0208<<14 | 0x37<<7 | 0x59, + 25098 - 19968: jis0208<<14 | 0x29<<7 | 0x49, + 25100 - 19968: jis0208<<14 | 0x37<<7 | 0x5B, + 25101 - 19968: jis0208<<14 | 0x37<<7 | 0x5A, + 25102 - 19968: jis0208<<14 | 0x1C<<7 | 0x1E, + 25104 - 19968: jis0208<<14 | 0x1F<<7 | 0x0D, + 25105 - 19968: jis0208<<14 | 0x11<<7 | 0x45, + 25106 - 19968: jis0208<<14 | 0x11<<7 | 0x5B, + 25107 - 19968: jis0208<<14 | 0x59<<7 | 0x0C, + 25108 - 19968: jis0208<<14 | 0x37<<7 | 0x5C, + 25109 - 19968: jis0212<<14 | 0x1E<<7 | 0x08, + 25110 - 19968: jis0208<<14 | 0x0F<<7 | 0x1E, + 25114 - 19968: jis0208<<14 | 0x1F<<7 | 0x2B, + 25115 - 19968: jis0208<<14 | 0x37<<7 | 0x5D, + 25116 - 19968: jis0212<<14 | 0x1E<<7 | 0x09, + 25117 - 19968: jis0208<<14 | 0x4B<<7 | 0x22, + 25118 - 19968: jis0208<<14 | 0x38<<7 | 0x00, + 25119 - 19968: jis0208<<14 | 0x16<<7 | 0x40, + 25120 - 19968: jis0212<<14 | 0x1E<<7 | 0x0A, + 25121 - 19968: jis0208<<14 | 0x38<<7 | 0x01, + 25122 - 19968: jis0212<<14 | 0x1E<<7 | 0x0B, + 25123 - 19968: jis0212<<14 | 0x1E<<7 | 0x0C, + 25126 - 19968: jis0208<<14 | 0x1F<<7 | 0x4E, + 25127 - 19968: jis0212<<14 | 0x1E<<7 | 0x0D, + 25129 - 19968: jis0212<<14 | 0x1E<<7 | 0x0E, + 25130 - 19968: jis0208<<14 | 0x38<<7 | 0x02, + 25131 - 19968: jis0212<<14 | 0x1E<<7 | 0x0F, + 25134 - 19968: jis0208<<14 | 0x38<<7 | 0x03, + 25135 - 19968: jis0208<<14 | 0x14<<7 | 0x19, + 25136 - 19968: jis0208<<14 | 0x38<<7 | 0x04, + 25138 - 19968: jis0208<<14 | 0x38<<7 | 0x05, + 25139 - 19968: jis0208<<14 | 0x38<<7 | 0x06, + 25140 - 19968: jis0208<<14 | 0x21<<7 | 0x36, + 25144 - 19968: jis0208<<14 | 0x17<<7 | 0x2C, + 25145 - 19968: jis0212<<14 | 0x1E<<7 | 0x10, + 25147 - 19968: jis0208<<14 | 0x2B<<7 | 0x40, + 25149 - 19968: jis0212<<14 | 0x1E<<7 | 0x11, + 25151 - 19968: jis0208<<14 | 0x2A<<7 | 0x1B, + 25152 - 19968: jis0208<<14 | 0x1C<<7 | 0x49, + 25153 - 19968: jis0208<<14 | 0x38<<7 | 0x07, + 25154 - 19968: jis0212<<14 | 0x1E<<7 | 0x12, + 25155 - 19968: jis0212<<14 | 0x1E<<7 | 0x13, + 25156 - 19968: jis0212<<14 | 0x1E<<7 | 0x14, + 25158 - 19968: jis0212<<14 | 0x1E<<7 | 0x15, + 25159 - 19968: jis0208<<14 | 0x1F<<7 | 0x4F, + 25160 - 19968: jis0208<<14 | 0x4D<<7 | 0x1C, + 25161 - 19968: jis0208<<14 | 0x27<<7 | 0x41, + 25163 - 19968: jis0208<<14 | 0x1B<<7 | 0x49, + 25164 - 19968: jis0212<<14 | 0x1E<<7 | 0x16, + 25165 - 19968: jis0208<<14 | 0x19<<7 | 0x2C, + 25166 - 19968: jis0208<<14 | 0x38<<7 | 0x08, + 25168 - 19968: jis0212<<14 | 0x1E<<7 | 0x17, + 25169 - 19968: jis0212<<14 | 0x1E<<7 | 0x18, + 25170 - 19968: jis0212<<14 | 0x1E<<7 | 0x19, + 25171 - 19968: jis0208<<14 | 0x21<<7 | 0x26, + 25172 - 19968: jis0212<<14 | 0x1E<<7 | 0x1A, + 25173 - 19968: jis0208<<14 | 0x29<<7 | 0x06, + 25174 - 19968: jis0212<<14 | 0x1E<<7 | 0x1B, + 25176 - 19968: jis0208<<14 | 0x21<<7 | 0x50, + 25178 - 19968: jis0212<<14 | 0x1E<<7 | 0x1C, + 25179 - 19968: jis0208<<14 | 0x38<<7 | 0x0B, + 25180 - 19968: jis0212<<14 | 0x1E<<7 | 0x1D, + 25182 - 19968: jis0208<<14 | 0x38<<7 | 0x09, + 25184 - 19968: jis0208<<14 | 0x38<<7 | 0x0C, + 25187 - 19968: jis0208<<14 | 0x38<<7 | 0x0A, + 25188 - 19968: jis0212<<14 | 0x1E<<7 | 0x1E, + 25192 - 19968: jis0208<<14 | 0x38<<7 | 0x0D, + 25197 - 19968: jis0212<<14 | 0x1E<<7 | 0x1F, + 25198 - 19968: jis0208<<14 | 0x29<<7 | 0x10, + 25199 - 19968: jis0212<<14 | 0x1E<<7 | 0x20, + 25201 - 19968: jis0208<<14 | 0x0F<<7 | 0x16, + 25203 - 19968: jis0212<<14 | 0x1E<<7 | 0x21, + 25206 - 19968: jis0208<<14 | 0x28<<7 | 0x3D, + 25209 - 19968: jis0208<<14 | 0x27<<7 | 0x42, + 25210 - 19968: jis0212<<14 | 0x1E<<7 | 0x22, + 25212 - 19968: jis0208<<14 | 0x38<<7 | 0x0E, + 25213 - 19968: jis0212<<14 | 0x1E<<7 | 0x23, + 25214 - 19968: jis0208<<14 | 0x38<<7 | 0x11, + 25215 - 19968: jis0208<<14 | 0x1D<<7 | 0x14, + 25216 - 19968: jis0208<<14 | 0x14<<7 | 0x1A, + 25218 - 19968: jis0208<<14 | 0x38<<7 | 0x0F, + 25219 - 19968: jis0208<<14 | 0x38<<7 | 0x16, + 25220 - 19968: jis0208<<14 | 0x1D<<7 | 0x15, + 25225 - 19968: jis0208<<14 | 0x38<<7 | 0x10, + 25226 - 19968: jis0208<<14 | 0x26<<7 | 0x23, + 25229 - 19968: jis0212<<14 | 0x1E<<7 | 0x24, + 25230 - 19968: jis0212<<14 | 0x1E<<7 | 0x25, + 25231 - 19968: jis0212<<14 | 0x1E<<7 | 0x26, + 25232 - 19968: jis0212<<14 | 0x1E<<7 | 0x27, + 25233 - 19968: jis0208<<14 | 0x2C<<7 | 0x3D, + 25234 - 19968: jis0208<<14 | 0x38<<7 | 0x12, + 25235 - 19968: jis0208<<14 | 0x38<<7 | 0x13, + 25236 - 19968: jis0208<<14 | 0x38<<7 | 0x17, + 25237 - 19968: jis0208<<14 | 0x24<<7 | 0x49, + 25238 - 19968: jis0208<<14 | 0x38<<7 | 0x14, + 25239 - 19968: jis0208<<14 | 0x18<<7 | 0x12, + 25240 - 19968: jis0208<<14 | 0x1F<<7 | 0x3D, + 25243 - 19968: jis0208<<14 | 0x38<<7 | 0x25, + 25244 - 19968: jis0208<<14 | 0x27<<7 | 0x13, + 25246 - 19968: jis0208<<14 | 0x21<<7 | 0x51, + 25254 - 19968: jis0208<<14 | 0x59<<7 | 0x0D, + 25256 - 19968: jis0212<<14 | 0x1E<<7 | 0x29, + 25259 - 19968: jis0208<<14 | 0x27<<7 | 0x43, + 25260 - 19968: jis0208<<14 | 0x39<<7 | 0x0C, + 25265 - 19968: jis0208<<14 | 0x29<<7 | 0x59, + 25267 - 19968: jis0212<<14 | 0x1E<<7 | 0x2A, + 25269 - 19968: jis0208<<14 | 0x23<<7 | 0x50, + 25270 - 19968: jis0212<<14 | 0x1E<<7 | 0x2B, + 25271 - 19968: jis0212<<14 | 0x1E<<7 | 0x2C, + 25273 - 19968: jis0208<<14 | 0x2A<<7 | 0x54, + 25274 - 19968: jis0212<<14 | 0x1E<<7 | 0x2D, + 25275 - 19968: jis0208<<14 | 0x38<<7 | 0x1A, + 25276 - 19968: jis0208<<14 | 0x11<<7 | 0x00, + 25277 - 19968: jis0208<<14 | 0x22<<7 | 0x49, + 25278 - 19968: jis0212<<14 | 0x1E<<7 | 0x2E, + 25279 - 19968: jis0212<<14 | 0x1E<<7 | 0x2F, + 25282 - 19968: jis0208<<14 | 0x38<<7 | 0x23, + 25284 - 19968: jis0212<<14 | 0x1E<<7 | 0x30, + 25285 - 19968: jis0208<<14 | 0x22<<7 | 0x13, + 25286 - 19968: jis0208<<14 | 0x38<<7 | 0x1D, + 25287 - 19968: jis0208<<14 | 0x38<<7 | 0x24, + 25288 - 19968: jis0208<<14 | 0x38<<7 | 0x1F, + 25289 - 19968: jis0208<<14 | 0x38<<7 | 0x26, + 25290 - 19968: jis0208<<14 | 0x38<<7 | 0x22, + 25292 - 19968: jis0208<<14 | 0x38<<7 | 0x21, + 25293 - 19968: jis0208<<14 | 0x26<<7 | 0x4E, + 25294 - 19968: jis0212<<14 | 0x1E<<7 | 0x31, + 25295 - 19968: jis0208<<14 | 0x38<<7 | 0x1B, + 25296 - 19968: jis0208<<14 | 0x11<<7 | 0x5C, + 25297 - 19968: jis0208<<14 | 0x38<<7 | 0x19, + 25298 - 19968: jis0208<<14 | 0x14<<7 | 0x50, + 25299 - 19968: jis0208<<14 | 0x21<<7 | 0x52, + 25300 - 19968: jis0208<<14 | 0x38<<7 | 0x15, + 25301 - 19968: jis0212<<14 | 0x1E<<7 | 0x32, + 25302 - 19968: jis0212<<14 | 0x1E<<7 | 0x33, + 25303 - 19968: jis0208<<14 | 0x38<<7 | 0x18, + 25304 - 19968: jis0208<<14 | 0x18<<7 | 0x13, + 25305 - 19968: jis0208<<14 | 0x1F<<7 | 0x3A, + 25306 - 19968: jis0212<<14 | 0x1E<<7 | 0x34, + 25307 - 19968: jis0208<<14 | 0x1D<<7 | 0x16, + 25308 - 19968: jis0208<<14 | 0x38<<7 | 0x20, + 25309 - 19968: jis0208<<14 | 0x26<<7 | 0x31, + 25312 - 19968: jis0208<<14 | 0x14<<7 | 0x51, + 25313 - 19968: jis0208<<14 | 0x12<<7 | 0x27, + 25322 - 19968: jis0212<<14 | 0x1E<<7 | 0x35, + 25324 - 19968: jis0208<<14 | 0x12<<7 | 0x46, + 25325 - 19968: jis0208<<14 | 0x1E<<7 | 0x00, + 25326 - 19968: jis0208<<14 | 0x38<<7 | 0x28, + 25327 - 19968: jis0208<<14 | 0x38<<7 | 0x2D, + 25329 - 19968: jis0208<<14 | 0x38<<7 | 0x29, + 25330 - 19968: jis0212<<14 | 0x1E<<7 | 0x36, + 25331 - 19968: jis0208<<14 | 0x16<<7 | 0x5C, + 25332 - 19968: jis0212<<14 | 0x1E<<7 | 0x37, + 25333 - 19968: jis0208<<14 | 0x38<<7 | 0x2E, + 25334 - 19968: jis0208<<14 | 0x1A<<7 | 0x01, + 25335 - 19968: jis0208<<14 | 0x18<<7 | 0x48, + 25340 - 19968: jis0212<<14 | 0x1E<<7 | 0x38, + 25341 - 19968: jis0212<<14 | 0x1E<<7 | 0x39, + 25342 - 19968: jis0208<<14 | 0x1C<<7 | 0x05, + 25343 - 19968: jis0208<<14 | 0x38<<7 | 0x1C, + 25345 - 19968: jis0208<<14 | 0x1A<<7 | 0x5C, + 25346 - 19968: jis0208<<14 | 0x38<<7 | 0x2B, + 25347 - 19968: jis0212<<14 | 0x1E<<7 | 0x3A, + 25348 - 19968: jis0212<<14 | 0x1E<<7 | 0x3B, + 25351 - 19968: jis0208<<14 | 0x1A<<7 | 0x37, + 25352 - 19968: jis0208<<14 | 0x38<<7 | 0x2C, + 25353 - 19968: jis0208<<14 | 0x0F<<7 | 0x23, + 25354 - 19968: jis0212<<14 | 0x1E<<7 | 0x3C, + 25355 - 19968: jis0212<<14 | 0x1E<<7 | 0x3D, + 25356 - 19968: jis0208<<14 | 0x38<<7 | 0x27, + 25357 - 19968: jis0212<<14 | 0x1E<<7 | 0x3E, + 25360 - 19968: jis0212<<14 | 0x1E<<7 | 0x3F, + 25361 - 19968: jis0208<<14 | 0x23<<7 | 0x08, + 25363 - 19968: jis0212<<14 | 0x1E<<7 | 0x40, + 25366 - 19968: jis0212<<14 | 0x1E<<7 | 0x41, + 25368 - 19968: jis0212<<14 | 0x1E<<7 | 0x42, + 25369 - 19968: jis0208<<14 | 0x14<<7 | 0x52, + 25375 - 19968: jis0208<<14 | 0x15<<7 | 0x13, + 25383 - 19968: jis0208<<14 | 0x38<<7 | 0x2A, + 25384 - 19968: jis0208<<14 | 0x0F<<7 | 0x06, + 25385 - 19968: jis0212<<14 | 0x1E<<7 | 0x43, + 25386 - 19968: jis0212<<14 | 0x1E<<7 | 0x44, + 25387 - 19968: jis0208<<14 | 0x19<<7 | 0x22, + 25389 - 19968: jis0212<<14 | 0x1E<<7 | 0x45, + 25391 - 19968: jis0208<<14 | 0x1E<<7 | 0x15, + 25397 - 19968: jis0212<<14 | 0x1E<<7 | 0x46, + 25398 - 19968: jis0212<<14 | 0x1E<<7 | 0x47, + 25401 - 19968: jis0212<<14 | 0x1E<<7 | 0x48, + 25402 - 19968: jis0208<<14 | 0x23<<7 | 0x51, + 25404 - 19968: jis0212<<14 | 0x1E<<7 | 0x49, + 25405 - 19968: jis0208<<14 | 0x27<<7 | 0x33, + 25406 - 19968: jis0208<<14 | 0x38<<7 | 0x30, + 25407 - 19968: jis0208<<14 | 0x20<<7 | 0x3D, + 25409 - 19968: jis0212<<14 | 0x1E<<7 | 0x4A, + 25410 - 19968: jis0212<<14 | 0x1E<<7 | 0x4B, + 25411 - 19968: jis0212<<14 | 0x1E<<7 | 0x4C, + 25412 - 19968: jis0212<<14 | 0x1E<<7 | 0x4D, + 25414 - 19968: jis0212<<14 | 0x1E<<7 | 0x4E, + 25417 - 19968: jis0208<<14 | 0x21<<7 | 0x09, + 25418 - 19968: jis0212<<14 | 0x1E<<7 | 0x4F, + 25419 - 19968: jis0212<<14 | 0x1E<<7 | 0x50, + 25420 - 19968: jis0208<<14 | 0x1A<<7 | 0x0A, + 25421 - 19968: jis0208<<14 | 0x38<<7 | 0x31, + 25422 - 19968: jis0212<<14 | 0x1E<<7 | 0x51, + 25423 - 19968: jis0208<<14 | 0x38<<7 | 0x33, + 25424 - 19968: jis0208<<14 | 0x38<<7 | 0x2F, + 25426 - 19968: jis0212<<14 | 0x1E<<7 | 0x52, + 25427 - 19968: jis0212<<14 | 0x1E<<7 | 0x53, + 25428 - 19968: jis0212<<14 | 0x1E<<7 | 0x54, + 25429 - 19968: jis0208<<14 | 0x29<<7 | 0x40, + 25431 - 19968: jis0208<<14 | 0x23<<7 | 0x1C, + 25432 - 19968: jis0212<<14 | 0x1E<<7 | 0x55, + 25435 - 19968: jis0212<<14 | 0x1E<<7 | 0x56, + 25436 - 19968: jis0208<<14 | 0x20<<7 | 0x3B, + 25445 - 19968: jis0212<<14 | 0x1E<<7 | 0x57, + 25446 - 19968: jis0212<<14 | 0x1E<<7 | 0x58, + 25447 - 19968: jis0208<<14 | 0x29<<7 | 0x5A, + 25448 - 19968: jis0208<<14 | 0x1B<<7 | 0x2D, + 25449 - 19968: jis0208<<14 | 0x38<<7 | 0x3F, + 25451 - 19968: jis0208<<14 | 0x38<<7 | 0x3E, + 25452 - 19968: jis0212<<14 | 0x1E<<7 | 0x59, + 25453 - 19968: jis0212<<14 | 0x1E<<7 | 0x5A, + 25454 - 19968: jis0208<<14 | 0x1E<<7 | 0x57, + 25457 - 19968: jis0212<<14 | 0x1E<<7 | 0x5B, + 25458 - 19968: jis0208<<14 | 0x16<<7 | 0x5D, + 25460 - 19968: jis0212<<14 | 0x1E<<7 | 0x5C, + 25461 - 19968: jis0212<<14 | 0x1E<<7 | 0x5D, + 25462 - 19968: jis0208<<14 | 0x38<<7 | 0x38, + 25463 - 19968: jis0208<<14 | 0x1D<<7 | 0x18, + 25464 - 19968: jis0212<<14 | 0x1F<<7 | 0x00, + 25466 - 19968: jis0208<<14 | 0x25<<7 | 0x47, + 25467 - 19968: jis0208<<14 | 0x26<<7 | 0x10, + 25468 - 19968: jis0212<<14 | 0x1F<<7 | 0x01, + 25469 - 19968: jis0212<<14 | 0x1F<<7 | 0x02, + 25471 - 19968: jis0212<<14 | 0x1F<<7 | 0x03, + 25472 - 19968: jis0208<<14 | 0x38<<7 | 0x36, + 25474 - 19968: jis0212<<14 | 0x1F<<7 | 0x04, + 25475 - 19968: jis0208<<14 | 0x20<<7 | 0x3C, + 25476 - 19968: jis0212<<14 | 0x1F<<7 | 0x05, + 25479 - 19968: jis0212<<14 | 0x1F<<7 | 0x06, + 25480 - 19968: jis0208<<14 | 0x1B<<7 | 0x57, + 25481 - 19968: jis0208<<14 | 0x38<<7 | 0x3B, + 25482 - 19968: jis0212<<14 | 0x1F<<7 | 0x07, + 25484 - 19968: jis0208<<14 | 0x1D<<7 | 0x17, + 25486 - 19968: jis0208<<14 | 0x38<<7 | 0x35, + 25487 - 19968: jis0208<<14 | 0x38<<7 | 0x3A, + 25488 - 19968: jis0212<<14 | 0x1F<<7 | 0x08, + 25490 - 19968: jis0208<<14 | 0x26<<7 | 0x32, + 25492 - 19968: jis0212<<14 | 0x1F<<7 | 0x09, + 25493 - 19968: jis0212<<14 | 0x1F<<7 | 0x0A, + 25494 - 19968: jis0208<<14 | 0x38<<7 | 0x34, + 25496 - 19968: jis0208<<14 | 0x16<<7 | 0x00, + 25497 - 19968: jis0212<<14 | 0x1F<<7 | 0x0B, + 25498 - 19968: jis0212<<14 | 0x1F<<7 | 0x0C, + 25499 - 19968: jis0208<<14 | 0x12<<7 | 0x3C, + 25502 - 19968: jis0212<<14 | 0x1F<<7 | 0x0D, + 25503 - 19968: jis0208<<14 | 0x38<<7 | 0x3C, + 25504 - 19968: jis0208<<14 | 0x2D<<7 | 0x0A, + 25505 - 19968: jis0208<<14 | 0x19<<7 | 0x2D, + 25506 - 19968: jis0208<<14 | 0x22<<7 | 0x14, + 25507 - 19968: jis0208<<14 | 0x38<<7 | 0x39, + 25508 - 19968: jis0212<<14 | 0x1F<<7 | 0x0E, + 25509 - 19968: jis0208<<14 | 0x1F<<7 | 0x3B, + 25510 - 19968: jis0212<<14 | 0x1F<<7 | 0x0F, + 25511 - 19968: jis0208<<14 | 0x18<<7 | 0x14, + 25512 - 19968: jis0208<<14 | 0x1E<<7 | 0x43, + 25513 - 19968: jis0208<<14 | 0x10<<7 | 0x45, + 25514 - 19968: jis0208<<14 | 0x20<<7 | 0x1B, + 25515 - 19968: jis0208<<14 | 0x38<<7 | 0x37, + 25516 - 19968: jis0208<<14 | 0x14<<7 | 0x24, + 25517 - 19968: jis0212<<14 | 0x1F<<7 | 0x10, + 25518 - 19968: jis0212<<14 | 0x1F<<7 | 0x11, + 25519 - 19968: jis0212<<14 | 0x1F<<7 | 0x12, + 25522 - 19968: jis0208<<14 | 0x16<<7 | 0x26, + 25524 - 19968: jis0208<<14 | 0x23<<7 | 0x2E, + 25525 - 19968: jis0208<<14 | 0x38<<7 | 0x3D, + 25531 - 19968: jis0208<<14 | 0x20<<7 | 0x3E, + 25533 - 19968: jis0212<<14 | 0x1F<<7 | 0x13, + 25534 - 19968: jis0208<<14 | 0x38<<7 | 0x40, + 25536 - 19968: jis0208<<14 | 0x38<<7 | 0x42, + 25537 - 19968: jis0212<<14 | 0x1F<<7 | 0x14, + 25539 - 19968: jis0208<<14 | 0x21<<7 | 0x16, + 25540 - 19968: jis0208<<14 | 0x38<<7 | 0x48, + 25541 - 19968: jis0212<<14 | 0x1F<<7 | 0x15, + 25542 - 19968: jis0208<<14 | 0x38<<7 | 0x43, + 25544 - 19968: jis0212<<14 | 0x1F<<7 | 0x16, + 25545 - 19968: jis0208<<14 | 0x38<<7 | 0x45, + 25550 - 19968: jis0212<<14 | 0x1F<<7 | 0x17, + 25551 - 19968: jis0208<<14 | 0x28<<7 | 0x20, + 25552 - 19968: jis0208<<14 | 0x23<<7 | 0x52, + 25553 - 19968: jis0212<<14 | 0x1F<<7 | 0x18, + 25554 - 19968: jis0208<<14 | 0x38<<7 | 0x46, + 25555 - 19968: jis0212<<14 | 0x1F<<7 | 0x19, + 25556 - 19968: jis0212<<14 | 0x1F<<7 | 0x1A, + 25557 - 19968: jis0212<<14 | 0x1F<<7 | 0x1B, + 25558 - 19968: jis0208<<14 | 0x2C<<7 | 0x0B, + 25562 - 19968: jis0208<<14 | 0x2C<<7 | 0x27, + 25563 - 19968: jis0208<<14 | 0x13<<7 | 0x18, + 25564 - 19968: jis0212<<14 | 0x1F<<7 | 0x1C, + 25568 - 19968: jis0212<<14 | 0x1F<<7 | 0x1D, + 25569 - 19968: jis0208<<14 | 0x0F<<7 | 0x0D, + 25571 - 19968: jis0208<<14 | 0x38<<7 | 0x44, + 25573 - 19968: jis0212<<14 | 0x1F<<7 | 0x1E, + 25577 - 19968: jis0208<<14 | 0x38<<7 | 0x41, + 25578 - 19968: jis0212<<14 | 0x1F<<7 | 0x1F, + 25580 - 19968: jis0212<<14 | 0x1F<<7 | 0x20, + 25582 - 19968: jis0208<<14 | 0x13<<7 | 0x57, + 25586 - 19968: jis0212<<14 | 0x1F<<7 | 0x21, + 25587 - 19968: jis0212<<14 | 0x1F<<7 | 0x22, + 25588 - 19968: jis0208<<14 | 0x10<<7 | 0x46, + 25589 - 19968: jis0208<<14 | 0x59<<7 | 0x0E, + 25590 - 19968: jis0208<<14 | 0x38<<7 | 0x47, + 25592 - 19968: jis0212<<14 | 0x1F<<7 | 0x24, + 25593 - 19968: jis0212<<14 | 0x1F<<7 | 0x25, + 25594 - 19968: jis0208<<14 | 0x2C<<7 | 0x28, + 25606 - 19968: jis0208<<14 | 0x38<<7 | 0x4B, + 25609 - 19968: jis0212<<14 | 0x1F<<7 | 0x26, + 25610 - 19968: jis0212<<14 | 0x1F<<7 | 0x27, + 25613 - 19968: jis0208<<14 | 0x21<<7 | 0x1A, + 25615 - 19968: jis0208<<14 | 0x38<<7 | 0x52, + 25616 - 19968: jis0212<<14 | 0x1F<<7 | 0x28, + 25618 - 19968: jis0212<<14 | 0x1F<<7 | 0x29, + 25619 - 19968: jis0208<<14 | 0x38<<7 | 0x4C, + 25620 - 19968: jis0212<<14 | 0x1F<<7 | 0x2A, + 25622 - 19968: jis0208<<14 | 0x38<<7 | 0x49, + 25623 - 19968: jis0208<<14 | 0x38<<7 | 0x50, + 25624 - 19968: jis0212<<14 | 0x1F<<7 | 0x2B, + 25628 - 19968: jis0208<<14 | 0x38<<7 | 0x32, + 25630 - 19968: jis0212<<14 | 0x1F<<7 | 0x2C, + 25632 - 19968: jis0212<<14 | 0x1F<<7 | 0x2D, + 25634 - 19968: jis0212<<14 | 0x1F<<7 | 0x2E, + 25636 - 19968: jis0212<<14 | 0x1F<<7 | 0x2F, + 25637 - 19968: jis0212<<14 | 0x1F<<7 | 0x30, + 25638 - 19968: jis0208<<14 | 0x38<<7 | 0x4D, + 25640 - 19968: jis0208<<14 | 0x38<<7 | 0x51, + 25641 - 19968: jis0212<<14 | 0x1F<<7 | 0x31, + 25642 - 19968: jis0212<<14 | 0x1F<<7 | 0x32, + 25644 - 19968: jis0208<<14 | 0x27<<7 | 0x21, + 25645 - 19968: jis0208<<14 | 0x24<<7 | 0x4A, + 25647 - 19968: jis0212<<14 | 0x1F<<7 | 0x33, + 25648 - 19968: jis0212<<14 | 0x1F<<7 | 0x34, + 25652 - 19968: jis0208<<14 | 0x38<<7 | 0x4A, + 25653 - 19968: jis0212<<14 | 0x1F<<7 | 0x35, + 25654 - 19968: jis0208<<14 | 0x38<<7 | 0x4E, + 25658 - 19968: jis0208<<14 | 0x16<<7 | 0x27, + 25661 - 19968: jis0212<<14 | 0x1F<<7 | 0x36, + 25662 - 19968: jis0208<<14 | 0x19<<7 | 0x50, + 25663 - 19968: jis0212<<14 | 0x1F<<7 | 0x37, + 25666 - 19968: jis0208<<14 | 0x1F<<7 | 0x3C, + 25675 - 19968: jis0212<<14 | 0x1F<<7 | 0x38, + 25678 - 19968: jis0208<<14 | 0x38<<7 | 0x56, + 25679 - 19968: jis0212<<14 | 0x1F<<7 | 0x39, + 25681 - 19968: jis0212<<14 | 0x1F<<7 | 0x3A, + 25682 - 19968: jis0212<<14 | 0x1F<<7 | 0x3B, + 25683 - 19968: jis0212<<14 | 0x1F<<7 | 0x3C, + 25684 - 19968: jis0212<<14 | 0x1F<<7 | 0x3D, + 25688 - 19968: jis0208<<14 | 0x24<<7 | 0x05, + 25690 - 19968: jis0212<<14 | 0x1F<<7 | 0x3E, + 25691 - 19968: jis0212<<14 | 0x1F<<7 | 0x3F, + 25692 - 19968: jis0212<<14 | 0x1F<<7 | 0x40, + 25693 - 19968: jis0212<<14 | 0x1F<<7 | 0x41, + 25695 - 19968: jis0212<<14 | 0x1F<<7 | 0x42, + 25696 - 19968: jis0208<<14 | 0x59<<7 | 0x0F, + 25697 - 19968: jis0212<<14 | 0x1F<<7 | 0x44, + 25699 - 19968: jis0212<<14 | 0x1F<<7 | 0x45, + 25703 - 19968: jis0208<<14 | 0x38<<7 | 0x53, + 25705 - 19968: jis0208<<14 | 0x2A<<7 | 0x3F, + 25709 - 19968: jis0212<<14 | 0x1F<<7 | 0x46, + 25711 - 19968: jis0208<<14 | 0x38<<7 | 0x54, + 25715 - 19968: jis0212<<14 | 0x1F<<7 | 0x47, + 25716 - 19968: jis0212<<14 | 0x1F<<7 | 0x48, + 25718 - 19968: jis0208<<14 | 0x38<<7 | 0x55, + 25720 - 19968: jis0208<<14 | 0x2B<<7 | 0x2D, + 25722 - 19968: jis0208<<14 | 0x1F<<7 | 0x01, + 25723 - 19968: jis0212<<14 | 0x1F<<7 | 0x49, + 25725 - 19968: jis0212<<14 | 0x1F<<7 | 0x4A, + 25731 - 19968: jis0208<<14 | 0x16<<7 | 0x41, + 25733 - 19968: jis0212<<14 | 0x1F<<7 | 0x4B, + 25735 - 19968: jis0212<<14 | 0x1F<<7 | 0x4C, + 25736 - 19968: jis0208<<14 | 0x38<<7 | 0x5C, + 25743 - 19968: jis0212<<14 | 0x1F<<7 | 0x4D, + 25744 - 19968: jis0212<<14 | 0x1F<<7 | 0x4E, + 25745 - 19968: jis0212<<14 | 0x1F<<7 | 0x4F, + 25746 - 19968: jis0208<<14 | 0x1A<<7 | 0x14, + 25747 - 19968: jis0208<<14 | 0x38<<7 | 0x59, + 25749 - 19968: jis0208<<14 | 0x38<<7 | 0x58, + 25752 - 19968: jis0212<<14 | 0x1F<<7 | 0x50, + 25753 - 19968: jis0212<<14 | 0x1F<<7 | 0x51, + 25754 - 19968: jis0208<<14 | 0x26<<7 | 0x11, + 25755 - 19968: jis0212<<14 | 0x1F<<7 | 0x52, + 25757 - 19968: jis0208<<14 | 0x59<<7 | 0x10, + 25758 - 19968: jis0208<<14 | 0x25<<7 | 0x14, + 25759 - 19968: jis0212<<14 | 0x1F<<7 | 0x54, + 25761 - 19968: jis0212<<14 | 0x1F<<7 | 0x55, + 25763 - 19968: jis0212<<14 | 0x1F<<7 | 0x56, + 25764 - 19968: jis0208<<14 | 0x24<<7 | 0x10, + 25765 - 19968: jis0208<<14 | 0x38<<7 | 0x5A, + 25766 - 19968: jis0212<<14 | 0x1F<<7 | 0x57, + 25768 - 19968: jis0212<<14 | 0x1F<<7 | 0x58, + 25769 - 19968: jis0208<<14 | 0x38<<7 | 0x5B, + 25771 - 19968: jis0208<<14 | 0x28<<7 | 0x4E, + 25772 - 19968: jis0212<<14 | 0x1F<<7 | 0x59, + 25773 - 19968: jis0208<<14 | 0x26<<7 | 0x24, + 25774 - 19968: jis0208<<14 | 0x1A<<7 | 0x02, + 25776 - 19968: jis0208<<14 | 0x1F<<7 | 0x50, + 25778 - 19968: jis0208<<14 | 0x2A<<7 | 0x2F, + 25779 - 19968: jis0212<<14 | 0x1F<<7 | 0x5A, + 25785 - 19968: jis0208<<14 | 0x12<<7 | 0x28, + 25787 - 19968: jis0208<<14 | 0x39<<7 | 0x04, + 25788 - 19968: jis0208<<14 | 0x38<<7 | 0x5D, + 25789 - 19968: jis0212<<14 | 0x1F<<7 | 0x5B, + 25790 - 19968: jis0212<<14 | 0x1F<<7 | 0x5C, + 25791 - 19968: jis0212<<14 | 0x1F<<7 | 0x5D, + 25793 - 19968: jis0208<<14 | 0x2C<<7 | 0x29, + 25794 - 19968: jis0208<<14 | 0x39<<7 | 0x06, + 25796 - 19968: jis0212<<14 | 0x20<<7 | 0x00, + 25797 - 19968: jis0208<<14 | 0x39<<7 | 0x02, + 25799 - 19968: jis0208<<14 | 0x39<<7 | 0x03, + 25801 - 19968: jis0212<<14 | 0x20<<7 | 0x01, + 25802 - 19968: jis0212<<14 | 0x20<<7 | 0x02, + 25803 - 19968: jis0212<<14 | 0x20<<7 | 0x03, + 25804 - 19968: jis0212<<14 | 0x20<<7 | 0x04, + 25805 - 19968: jis0208<<14 | 0x20<<7 | 0x3F, + 25806 - 19968: jis0208<<14 | 0x59<<7 | 0x11, + 25808 - 19968: jis0212<<14 | 0x20<<7 | 0x06, + 25809 - 19968: jis0212<<14 | 0x20<<7 | 0x07, + 25810 - 19968: jis0208<<14 | 0x39<<7 | 0x01, + 25812 - 19968: jis0208<<14 | 0x38<<7 | 0x1E, + 25813 - 19968: jis0212<<14 | 0x20<<7 | 0x08, + 25815 - 19968: jis0212<<14 | 0x20<<7 | 0x09, + 25816 - 19968: jis0208<<14 | 0x39<<7 | 0x05, + 25818 - 19968: jis0208<<14 | 0x39<<7 | 0x00, + 25824 - 19968: jis0208<<14 | 0x39<<7 | 0x0A, + 25825 - 19968: jis0208<<14 | 0x39<<7 | 0x0B, + 25826 - 19968: jis0208<<14 | 0x24<<7 | 0x06, + 25827 - 19968: jis0208<<14 | 0x39<<7 | 0x0D, + 25828 - 19968: jis0212<<14 | 0x20<<7 | 0x0A, + 25829 - 19968: jis0212<<14 | 0x20<<7 | 0x0B, + 25830 - 19968: jis0208<<14 | 0x1A<<7 | 0x03, + 25831 - 19968: jis0208<<14 | 0x39<<7 | 0x08, + 25833 - 19968: jis0212<<14 | 0x20<<7 | 0x0C, + 25834 - 19968: jis0212<<14 | 0x20<<7 | 0x0D, + 25836 - 19968: jis0208<<14 | 0x14<<7 | 0x1B, + 25837 - 19968: jis0212<<14 | 0x20<<7 | 0x0E, + 25839 - 19968: jis0208<<14 | 0x39<<7 | 0x0E, + 25840 - 19968: jis0212<<14 | 0x20<<7 | 0x0F, + 25841 - 19968: jis0208<<14 | 0x39<<7 | 0x07, + 25842 - 19968: jis0208<<14 | 0x39<<7 | 0x12, + 25844 - 19968: jis0208<<14 | 0x39<<7 | 0x11, + 25845 - 19968: jis0212<<14 | 0x20<<7 | 0x10, + 25846 - 19968: jis0208<<14 | 0x39<<7 | 0x10, + 25847 - 19968: jis0212<<14 | 0x20<<7 | 0x11, + 25850 - 19968: jis0208<<14 | 0x39<<7 | 0x13, + 25851 - 19968: jis0212<<14 | 0x20<<7 | 0x12, + 25853 - 19968: jis0208<<14 | 0x39<<7 | 0x15, + 25854 - 19968: jis0208<<14 | 0x1D<<7 | 0x50, + 25855 - 19968: jis0212<<14 | 0x20<<7 | 0x13, + 25856 - 19968: jis0208<<14 | 0x39<<7 | 0x14, + 25857 - 19968: jis0212<<14 | 0x20<<7 | 0x14, + 25860 - 19968: jis0212<<14 | 0x20<<7 | 0x15, + 25861 - 19968: jis0208<<14 | 0x39<<7 | 0x18, + 25864 - 19968: jis0212<<14 | 0x20<<7 | 0x16, + 25865 - 19968: jis0212<<14 | 0x20<<7 | 0x17, + 25866 - 19968: jis0212<<14 | 0x20<<7 | 0x18, + 25871 - 19968: jis0212<<14 | 0x20<<7 | 0x19, + 25875 - 19968: jis0212<<14 | 0x20<<7 | 0x1A, + 25876 - 19968: jis0212<<14 | 0x20<<7 | 0x1B, + 25878 - 19968: jis0212<<14 | 0x20<<7 | 0x1C, + 25880 - 19968: jis0208<<14 | 0x39<<7 | 0x16, + 25881 - 19968: jis0212<<14 | 0x20<<7 | 0x1D, + 25883 - 19968: jis0212<<14 | 0x20<<7 | 0x1E, + 25884 - 19968: jis0208<<14 | 0x39<<7 | 0x17, + 25885 - 19968: jis0208<<14 | 0x38<<7 | 0x4F, + 25886 - 19968: jis0212<<14 | 0x20<<7 | 0x1F, + 25887 - 19968: jis0212<<14 | 0x20<<7 | 0x20, + 25890 - 19968: jis0212<<14 | 0x20<<7 | 0x21, + 25891 - 19968: jis0208<<14 | 0x39<<7 | 0x1A, + 25892 - 19968: jis0208<<14 | 0x39<<7 | 0x19, + 25894 - 19968: jis0212<<14 | 0x20<<7 | 0x22, + 25897 - 19968: jis0212<<14 | 0x20<<7 | 0x23, + 25898 - 19968: jis0208<<14 | 0x38<<7 | 0x57, + 25899 - 19968: jis0208<<14 | 0x39<<7 | 0x1B, + 25900 - 19968: jis0208<<14 | 0x39<<7 | 0x0F, + 25902 - 19968: jis0212<<14 | 0x20<<7 | 0x24, + 25903 - 19968: jis0208<<14 | 0x1A<<7 | 0x38, + 25905 - 19968: jis0212<<14 | 0x20<<7 | 0x25, + 25908 - 19968: jis0208<<14 | 0x39<<7 | 0x1C, + 25909 - 19968: jis0208<<14 | 0x39<<7 | 0x1D, + 25910 - 19968: jis0208<<14 | 0x39<<7 | 0x1F, + 25911 - 19968: jis0208<<14 | 0x39<<7 | 0x1E, + 25912 - 19968: jis0208<<14 | 0x39<<7 | 0x20, + 25913 - 19968: jis0208<<14 | 0x11<<7 | 0x5D, + 25914 - 19968: jis0212<<14 | 0x20<<7 | 0x26, + 25915 - 19968: jis0208<<14 | 0x18<<7 | 0x15, + 25916 - 19968: jis0212<<14 | 0x20<<7 | 0x27, + 25917 - 19968: jis0212<<14 | 0x20<<7 | 0x28, + 25918 - 19968: jis0208<<14 | 0x29<<7 | 0x5B, + 25919 - 19968: jis0208<<14 | 0x1F<<7 | 0x0E, + 25923 - 19968: jis0212<<14 | 0x20<<7 | 0x29, + 25925 - 19968: jis0208<<14 | 0x17<<7 | 0x2D, + 25927 - 19968: jis0212<<14 | 0x20<<7 | 0x2A, + 25928 - 19968: jis0208<<14 | 0x39<<7 | 0x22, + 25929 - 19968: jis0212<<14 | 0x20<<7 | 0x2B, + 25933 - 19968: jis0208<<14 | 0x39<<7 | 0x25, + 25934 - 19968: jis0208<<14 | 0x59<<7 | 0x12, + 25935 - 19968: jis0208<<14 | 0x28<<7 | 0x31, + 25936 - 19968: jis0212<<14 | 0x20<<7 | 0x2C, + 25937 - 19968: jis0208<<14 | 0x14<<7 | 0x3E, + 25938 - 19968: jis0212<<14 | 0x20<<7 | 0x2D, + 25940 - 19968: jis0212<<14 | 0x20<<7 | 0x2E, + 25941 - 19968: jis0208<<14 | 0x39<<7 | 0x24, + 25942 - 19968: jis0208<<14 | 0x39<<7 | 0x23, + 25943 - 19968: jis0208<<14 | 0x26<<7 | 0x33, + 25944 - 19968: jis0208<<14 | 0x39<<7 | 0x26, + 25945 - 19968: jis0208<<14 | 0x15<<7 | 0x14, + 25949 - 19968: jis0208<<14 | 0x39<<7 | 0x28, + 25950 - 19968: jis0208<<14 | 0x39<<7 | 0x27, + 25951 - 19968: jis0212<<14 | 0x20<<7 | 0x2F, + 25952 - 19968: jis0212<<14 | 0x20<<7 | 0x30, + 25954 - 19968: jis0208<<14 | 0x13<<7 | 0x19, + 25955 - 19968: jis0208<<14 | 0x1A<<7 | 0x15, + 25958 - 19968: jis0208<<14 | 0x25<<7 | 0x37, + 25959 - 19968: jis0212<<14 | 0x20<<7 | 0x31, + 25963 - 19968: jis0212<<14 | 0x20<<7 | 0x32, + 25964 - 19968: jis0208<<14 | 0x16<<7 | 0x28, + 25968 - 19968: jis0208<<14 | 0x1E<<7 | 0x53, + 25970 - 19968: jis0208<<14 | 0x39<<7 | 0x29, + 25972 - 19968: jis0208<<14 | 0x1F<<7 | 0x0F, + 25973 - 19968: jis0208<<14 | 0x24<<7 | 0x07, + 25975 - 19968: jis0208<<14 | 0x28<<7 | 0x3E, + 25976 - 19968: jis0208<<14 | 0x39<<7 | 0x2A, + 25978 - 19968: jis0212<<14 | 0x20<<7 | 0x33, + 25981 - 19968: jis0212<<14 | 0x20<<7 | 0x34, + 25985 - 19968: jis0212<<14 | 0x20<<7 | 0x35, + 25986 - 19968: jis0208<<14 | 0x39<<7 | 0x2B, + 25987 - 19968: jis0208<<14 | 0x39<<7 | 0x2C, + 25989 - 19968: jis0212<<14 | 0x20<<7 | 0x36, + 25991 - 19968: jis0208<<14 | 0x29<<7 | 0x17, + 25992 - 19968: jis0208<<14 | 0x34<<7 | 0x3C, + 25993 - 19968: jis0208<<14 | 0x1F<<7 | 0x25, + 25994 - 19968: jis0212<<14 | 0x20<<7 | 0x37, + 25996 - 19968: jis0208<<14 | 0x28<<7 | 0x2B, + 25998 - 19968: jis0208<<14 | 0x19<<7 | 0x37, + 26000 - 19968: jis0208<<14 | 0x27<<7 | 0x44, + 26001 - 19968: jis0208<<14 | 0x27<<7 | 0x22, + 26002 - 19968: jis0212<<14 | 0x20<<7 | 0x38, + 26005 - 19968: jis0212<<14 | 0x20<<7 | 0x39, + 26007 - 19968: jis0208<<14 | 0x24<<7 | 0x2C, + 26008 - 19968: jis0212<<14 | 0x20<<7 | 0x3A, + 26009 - 19968: jis0208<<14 | 0x2D<<7 | 0x20, + 26011 - 19968: jis0208<<14 | 0x39<<7 | 0x2E, + 26012 - 19968: jis0208<<14 | 0x1B<<7 | 0x2F, + 26013 - 19968: jis0212<<14 | 0x20<<7 | 0x3B, + 26015 - 19968: jis0208<<14 | 0x39<<7 | 0x2F, + 26016 - 19968: jis0212<<14 | 0x20<<7 | 0x3C, + 26017 - 19968: jis0208<<14 | 0x0F<<7 | 0x15, + 26019 - 19968: jis0212<<14 | 0x20<<7 | 0x3D, + 26020 - 19968: jis0208<<14 | 0x15<<7 | 0x33, + 26021 - 19968: jis0208<<14 | 0x1F<<7 | 0x2C, + 26022 - 19968: jis0212<<14 | 0x20<<7 | 0x3E, + 26023 - 19968: jis0208<<14 | 0x28<<7 | 0x3F, + 26027 - 19968: jis0208<<14 | 0x39<<7 | 0x30, + 26028 - 19968: jis0208<<14 | 0x1A<<7 | 0x21, + 26029 - 19968: jis0208<<14 | 0x22<<7 | 0x26, + 26030 - 19968: jis0212<<14 | 0x20<<7 | 0x3F, + 26031 - 19968: jis0208<<14 | 0x1A<<7 | 0x3A, + 26032 - 19968: jis0208<<14 | 0x1E<<7 | 0x16, + 26034 - 19968: jis0212<<14 | 0x20<<7 | 0x40, + 26035 - 19968: jis0212<<14 | 0x20<<7 | 0x41, + 26036 - 19968: jis0212<<14 | 0x20<<7 | 0x42, + 26039 - 19968: jis0208<<14 | 0x39<<7 | 0x31, + 26041 - 19968: jis0208<<14 | 0x29<<7 | 0x5C, + 26044 - 19968: jis0208<<14 | 0x10<<7 | 0x56, + 26045 - 19968: jis0208<<14 | 0x1A<<7 | 0x3B, + 26047 - 19968: jis0212<<14 | 0x20<<7 | 0x43, + 26049 - 19968: jis0208<<14 | 0x39<<7 | 0x34, + 26050 - 19968: jis0212<<14 | 0x20<<7 | 0x44, + 26051 - 19968: jis0208<<14 | 0x39<<7 | 0x32, + 26052 - 19968: jis0208<<14 | 0x39<<7 | 0x35, + 26053 - 19968: jis0208<<14 | 0x2D<<7 | 0x18, + 26054 - 19968: jis0208<<14 | 0x39<<7 | 0x33, + 26056 - 19968: jis0212<<14 | 0x20<<7 | 0x45, + 26057 - 19968: jis0212<<14 | 0x20<<7 | 0x46, + 26059 - 19968: jis0208<<14 | 0x1F<<7 | 0x5A, + 26060 - 19968: jis0208<<14 | 0x39<<7 | 0x36, + 26062 - 19968: jis0212<<14 | 0x20<<7 | 0x47, + 26063 - 19968: jis0208<<14 | 0x21<<7 | 0x11, + 26064 - 19968: jis0212<<14 | 0x20<<7 | 0x48, + 26066 - 19968: jis0208<<14 | 0x39<<7 | 0x37, + 26068 - 19968: jis0212<<14 | 0x20<<7 | 0x49, + 26070 - 19968: jis0212<<14 | 0x20<<7 | 0x4A, + 26071 - 19968: jis0208<<14 | 0x13<<7 | 0x59, + 26072 - 19968: jis0212<<14 | 0x20<<7 | 0x4B, + 26073 - 19968: jis0208<<14 | 0x39<<7 | 0x39, + 26075 - 19968: jis0208<<14 | 0x39<<7 | 0x38, + 26079 - 19968: jis0212<<14 | 0x20<<7 | 0x4C, + 26080 - 19968: jis0208<<14 | 0x39<<7 | 0x3A, + 26081 - 19968: jis0208<<14 | 0x39<<7 | 0x3B, + 26082 - 19968: jis0208<<14 | 0x13<<7 | 0x5A, + 26085 - 19968: jis0208<<14 | 0x25<<7 | 0x5B, + 26086 - 19968: jis0208<<14 | 0x22<<7 | 0x15, + 26087 - 19968: jis0208<<14 | 0x14<<7 | 0x4B, + 26088 - 19968: jis0208<<14 | 0x1A<<7 | 0x3C, + 26089 - 19968: jis0208<<14 | 0x20<<7 | 0x40, + 26092 - 19968: jis0208<<14 | 0x1C<<7 | 0x3B, + 26093 - 19968: jis0208<<14 | 0x0F<<7 | 0x0F, + 26096 - 19968: jis0212<<14 | 0x20<<7 | 0x4D, + 26097 - 19968: jis0208<<14 | 0x39<<7 | 0x3C, + 26098 - 19968: jis0212<<14 | 0x20<<7 | 0x4E, + 26100 - 19968: jis0212<<14 | 0x20<<7 | 0x4F, + 26101 - 19968: jis0212<<14 | 0x20<<7 | 0x50, + 26105 - 19968: jis0212<<14 | 0x20<<7 | 0x51, + 26106 - 19968: jis0208<<14 | 0x11<<7 | 0x01, + 26107 - 19968: jis0208<<14 | 0x39<<7 | 0x40, + 26110 - 19968: jis0212<<14 | 0x20<<7 | 0x52, + 26111 - 19968: jis0212<<14 | 0x20<<7 | 0x53, + 26112 - 19968: jis0208<<14 | 0x59<<7 | 0x13, + 26114 - 19968: jis0208<<14 | 0x18<<7 | 0x16, + 26115 - 19968: jis0208<<14 | 0x39<<7 | 0x3F, + 26116 - 19968: jis0212<<14 | 0x20<<7 | 0x55, + 26118 - 19968: jis0208<<14 | 0x19<<7 | 0x0A, + 26119 - 19968: jis0208<<14 | 0x1D<<7 | 0x19, + 26120 - 19968: jis0212<<14 | 0x20<<7 | 0x56, + 26121 - 19968: jis0208<<14 | 0x59<<7 | 0x16, + 26122 - 19968: jis0208<<14 | 0x39<<7 | 0x3E, + 26124 - 19968: jis0208<<14 | 0x1D<<7 | 0x1A, + 26125 - 19968: jis0212<<14 | 0x20<<7 | 0x58, + 26126 - 19968: jis0208<<14 | 0x2B<<7 | 0x1F, + 26127 - 19968: jis0208<<14 | 0x19<<7 | 0x09, + 26129 - 19968: jis0212<<14 | 0x20<<7 | 0x59, + 26130 - 19968: jis0212<<14 | 0x20<<7 | 0x5A, + 26131 - 19968: jis0208<<14 | 0x0F<<7 | 0x36, + 26132 - 19968: jis0208<<14 | 0x1F<<7 | 0x2D, + 26133 - 19968: jis0208<<14 | 0x59<<7 | 0x14, + 26134 - 19968: jis0212<<14 | 0x20<<7 | 0x5C, + 26140 - 19968: jis0208<<14 | 0x39<<7 | 0x45, + 26141 - 19968: jis0212<<14 | 0x20<<7 | 0x5D, + 26142 - 19968: jis0208<<14 | 0x59<<7 | 0x18, + 26143 - 19968: jis0208<<14 | 0x1F<<7 | 0x10, + 26144 - 19968: jis0208<<14 | 0x10<<7 | 0x26, + 26145 - 19968: jis0212<<14 | 0x21<<7 | 0x01, + 26146 - 19968: jis0212<<14 | 0x21<<7 | 0x02, + 26147 - 19968: jis0212<<14 | 0x21<<7 | 0x03, + 26148 - 19968: jis0208<<14 | 0x59<<7 | 0x19, + 26149 - 19968: jis0208<<14 | 0x1C<<7 | 0x34, + 26150 - 19968: jis0212<<14 | 0x21<<7 | 0x05, + 26151 - 19968: jis0208<<14 | 0x2A<<7 | 0x45, + 26152 - 19968: jis0208<<14 | 0x19<<7 | 0x51, + 26153 - 19968: jis0212<<14 | 0x21<<7 | 0x06, + 26154 - 19968: jis0212<<14 | 0x21<<7 | 0x07, + 26155 - 19968: jis0212<<14 | 0x21<<7 | 0x08, + 26156 - 19968: jis0212<<14 | 0x21<<7 | 0x09, + 26157 - 19968: jis0208<<14 | 0x1D<<7 | 0x1B, + 26158 - 19968: jis0208<<14 | 0x59<<7 | 0x17, + 26159 - 19968: jis0208<<14 | 0x1F<<7 | 0x06, + 26160 - 19968: jis0212<<14 | 0x21<<7 | 0x0B, + 26161 - 19968: jis0208<<14 | 0x58<<7 | 0x07, + 26163 - 19968: jis0212<<14 | 0x21<<7 | 0x0D, + 26164 - 19968: jis0208<<14 | 0x39<<7 | 0x44, + 26165 - 19968: jis0208<<14 | 0x39<<7 | 0x42, + 26166 - 19968: jis0208<<14 | 0x39<<7 | 0x43, + 26167 - 19968: jis0212<<14 | 0x21<<7 | 0x0F, + 26169 - 19968: jis0212<<14 | 0x21<<7 | 0x0E, + 26171 - 19968: jis0208<<14 | 0x59<<7 | 0x15, + 26172 - 19968: jis0208<<14 | 0x22<<7 | 0x4A, + 26175 - 19968: jis0208<<14 | 0x3A<<7 | 0x05, + 26176 - 19968: jis0212<<14 | 0x21<<7 | 0x10, + 26177 - 19968: jis0208<<14 | 0x39<<7 | 0x49, + 26178 - 19968: jis0208<<14 | 0x1A<<7 | 0x5D, + 26179 - 19968: jis0208<<14 | 0x18<<7 | 0x17, + 26180 - 19968: jis0208<<14 | 0x39<<7 | 0x47, + 26181 - 19968: jis0212<<14 | 0x21<<7 | 0x11, + 26182 - 19968: jis0212<<14 | 0x21<<7 | 0x12, + 26185 - 19968: jis0208<<14 | 0x39<<7 | 0x48, + 26186 - 19968: jis0212<<14 | 0x21<<7 | 0x13, + 26187 - 19968: jis0208<<14 | 0x1E<<7 | 0x17, + 26188 - 19968: jis0212<<14 | 0x21<<7 | 0x14, + 26190 - 19968: jis0212<<14 | 0x21<<7 | 0x16, + 26191 - 19968: jis0208<<14 | 0x39<<7 | 0x46, + 26193 - 19968: jis0212<<14 | 0x21<<7 | 0x15, + 26194 - 19968: jis0208<<14 | 0x1A<<7 | 0x0E, + 26199 - 19968: jis0208<<14 | 0x59<<7 | 0x1B, + 26200 - 19968: jis0212<<14 | 0x21<<7 | 0x18, + 26201 - 19968: jis0208<<14 | 0x59<<7 | 0x1C, + 26203 - 19968: jis0212<<14 | 0x21<<7 | 0x1A, + 26204 - 19968: jis0212<<14 | 0x21<<7 | 0x1B, + 26205 - 19968: jis0208<<14 | 0x39<<7 | 0x4B, + 26206 - 19968: jis0208<<14 | 0x39<<7 | 0x4A, + 26207 - 19968: jis0208<<14 | 0x39<<7 | 0x4F, + 26208 - 19968: jis0212<<14 | 0x21<<7 | 0x1C, + 26209 - 19968: jis0212<<14 | 0x21<<7 | 0x1D, + 26210 - 19968: jis0208<<14 | 0x39<<7 | 0x50, + 26212 - 19968: jis0208<<14 | 0x39<<7 | 0x4C, + 26213 - 19968: jis0208<<14 | 0x59<<7 | 0x1A, + 26214 - 19968: jis0208<<14 | 0x12<<7 | 0x01, + 26215 - 19968: jis0208<<14 | 0x39<<7 | 0x4D, + 26216 - 19968: jis0208<<14 | 0x39<<7 | 0x4E, + 26217 - 19968: jis0208<<14 | 0x27<<7 | 0x34, + 26218 - 19968: jis0212<<14 | 0x21<<7 | 0x1F, + 26219 - 19968: jis0212<<14 | 0x21<<7 | 0x20, + 26220 - 19968: jis0212<<14 | 0x21<<7 | 0x21, + 26222 - 19968: jis0208<<14 | 0x28<<7 | 0x40, + 26223 - 19968: jis0208<<14 | 0x16<<7 | 0x29, + 26224 - 19968: jis0208<<14 | 0x39<<7 | 0x51, + 26227 - 19968: jis0208<<14 | 0x59<<7 | 0x1E, + 26228 - 19968: jis0208<<14 | 0x1F<<7 | 0x11, + 26229 - 19968: jis0212<<14 | 0x21<<7 | 0x24, + 26230 - 19968: jis0208<<14 | 0x1D<<7 | 0x1C, + 26231 - 19968: jis0212<<14 | 0x21<<7 | 0x26, + 26232 - 19968: jis0212<<14 | 0x21<<7 | 0x27, + 26233 - 19968: jis0212<<14 | 0x21<<7 | 0x28, + 26234 - 19968: jis0208<<14 | 0x22<<7 | 0x31, + 26235 - 19968: jis0212<<14 | 0x21<<7 | 0x29, + 26236 - 19968: jis0212<<14 | 0x21<<7 | 0x2B, + 26238 - 19968: jis0212<<14 | 0x21<<7 | 0x22, + 26239 - 19968: jis0212<<14 | 0x21<<7 | 0x25, + 26240 - 19968: jis0212<<14 | 0x21<<7 | 0x2A, + 26241 - 19968: jis0208<<14 | 0x15<<7 | 0x26, + 26243 - 19968: jis0208<<14 | 0x39<<7 | 0x52, + 26244 - 19968: jis0208<<14 | 0x39<<7 | 0x56, + 26247 - 19968: jis0208<<14 | 0x11<<7 | 0x2A, + 26248 - 19968: jis0208<<14 | 0x39<<7 | 0x53, + 26249 - 19968: jis0208<<14 | 0x39<<7 | 0x55, + 26251 - 19968: jis0212<<14 | 0x21<<7 | 0x2C, + 26252 - 19968: jis0212<<14 | 0x21<<7 | 0x2D, + 26253 - 19968: jis0212<<14 | 0x21<<7 | 0x2E, + 26254 - 19968: jis0208<<14 | 0x39<<7 | 0x54, + 26256 - 19968: jis0212<<14 | 0x21<<7 | 0x2F, + 26257 - 19968: jis0208<<14 | 0x1C<<7 | 0x4A, + 26258 - 19968: jis0212<<14 | 0x21<<7 | 0x30, + 26262 - 19968: jis0208<<14 | 0x22<<7 | 0x27, + 26263 - 19968: jis0208<<14 | 0x0F<<7 | 0x24, + 26264 - 19968: jis0208<<14 | 0x39<<7 | 0x57, + 26265 - 19968: jis0208<<14 | 0x59<<7 | 0x1F, + 26266 - 19968: jis0212<<14 | 0x21<<7 | 0x32, + 26267 - 19968: jis0212<<14 | 0x21<<7 | 0x33, + 26268 - 19968: jis0212<<14 | 0x21<<7 | 0x34, + 26269 - 19968: jis0208<<14 | 0x39<<7 | 0x58, + 26271 - 19968: jis0212<<14 | 0x21<<7 | 0x35, + 26272 - 19968: jis0208<<14 | 0x59<<7 | 0x20, + 26274 - 19968: jis0208<<14 | 0x23<<7 | 0x09, + 26276 - 19968: jis0212<<14 | 0x21<<7 | 0x37, + 26278 - 19968: jis0208<<14 | 0x2D<<7 | 0x50, + 26283 - 19968: jis0208<<14 | 0x1A<<7 | 0x22, + 26285 - 19968: jis0212<<14 | 0x21<<7 | 0x38, + 26286 - 19968: jis0208<<14 | 0x29<<7 | 0x4A, + 26289 - 19968: jis0212<<14 | 0x21<<7 | 0x39, + 26290 - 19968: jis0208<<14 | 0x59<<7 | 0x21, + 26292 - 19968: jis0208<<14 | 0x2A<<7 | 0x1C, + 26293 - 19968: jis0212<<14 | 0x21<<7 | 0x3B, + 26296 - 19968: jis0208<<14 | 0x3A<<7 | 0x01, + 26297 - 19968: jis0208<<14 | 0x39<<7 | 0x5A, + 26299 - 19968: jis0212<<14 | 0x21<<7 | 0x3C, + 26300 - 19968: jis0208<<14 | 0x39<<7 | 0x5D, + 26302 - 19968: jis0208<<14 | 0x39<<7 | 0x5C, + 26303 - 19968: jis0208<<14 | 0x59<<7 | 0x22, + 26304 - 19968: jis0212<<14 | 0x21<<7 | 0x3E, + 26305 - 19968: jis0208<<14 | 0x39<<7 | 0x59, + 26306 - 19968: jis0212<<14 | 0x21<<7 | 0x3F, + 26307 - 19968: jis0212<<14 | 0x21<<7 | 0x40, + 26308 - 19968: jis0208<<14 | 0x3A<<7 | 0x00, + 26311 - 19968: jis0208<<14 | 0x25<<7 | 0x3D, + 26312 - 19968: jis0212<<14 | 0x21<<7 | 0x41, + 26313 - 19968: jis0208<<14 | 0x39<<7 | 0x5B, + 26316 - 19968: jis0212<<14 | 0x21<<7 | 0x42, + 26318 - 19968: jis0212<<14 | 0x21<<7 | 0x43, + 26319 - 19968: jis0212<<14 | 0x21<<7 | 0x44, + 26324 - 19968: jis0212<<14 | 0x21<<7 | 0x45, + 26326 - 19968: jis0208<<14 | 0x3A<<7 | 0x02, + 26329 - 19968: jis0208<<14 | 0x1C<<7 | 0x4B, + 26330 - 19968: jis0208<<14 | 0x3A<<7 | 0x03, + 26331 - 19968: jis0212<<14 | 0x21<<7 | 0x46, + 26332 - 19968: jis0208<<14 | 0x2C<<7 | 0x2A, + 26333 - 19968: jis0208<<14 | 0x26<<7 | 0x57, + 26335 - 19968: jis0212<<14 | 0x21<<7 | 0x47, + 26336 - 19968: jis0208<<14 | 0x3A<<7 | 0x04, + 26342 - 19968: jis0208<<14 | 0x3A<<7 | 0x06, + 26344 - 19968: jis0212<<14 | 0x21<<7 | 0x48, + 26345 - 19968: jis0208<<14 | 0x3A<<7 | 0x07, + 26347 - 19968: jis0212<<14 | 0x21<<7 | 0x49, + 26348 - 19968: jis0212<<14 | 0x21<<7 | 0x4A, + 26350 - 19968: jis0212<<14 | 0x21<<7 | 0x4B, + 26352 - 19968: jis0208<<14 | 0x3A<<7 | 0x08, + 26354 - 19968: jis0208<<14 | 0x15<<7 | 0x29, + 26355 - 19968: jis0208<<14 | 0x10<<7 | 0x27, + 26356 - 19968: jis0208<<14 | 0x18<<7 | 0x18, + 26357 - 19968: jis0208<<14 | 0x3A<<7 | 0x09, + 26359 - 19968: jis0208<<14 | 0x3A<<7 | 0x0A, + 26360 - 19968: jis0208<<14 | 0x1C<<7 | 0x50, + 26361 - 19968: jis0208<<14 | 0x20<<7 | 0x41, + 26362 - 19968: jis0208<<14 | 0x59<<7 | 0x23, + 26363 - 19968: jis0208<<14 | 0x58<<7 | 0x0A, + 26364 - 19968: jis0208<<14 | 0x31<<7 | 0x37, + 26365 - 19968: jis0208<<14 | 0x20<<7 | 0x1D, + 26366 - 19968: jis0208<<14 | 0x20<<7 | 0x1C, + 26367 - 19968: jis0208<<14 | 0x21<<7 | 0x37, + 26368 - 19968: jis0208<<14 | 0x19<<7 | 0x26, + 26371 - 19968: jis0208<<14 | 0x2F<<7 | 0x51, + 26373 - 19968: jis0212<<14 | 0x21<<7 | 0x4D, + 26375 - 19968: jis0212<<14 | 0x21<<7 | 0x4E, + 26376 - 19968: jis0208<<14 | 0x16<<7 | 0x4D, + 26377 - 19968: jis0208<<14 | 0x2C<<7 | 0x0C, + 26379 - 19968: jis0208<<14 | 0x29<<7 | 0x5D, + 26381 - 19968: jis0208<<14 | 0x28<<7 | 0x5D, + 26382 - 19968: jis0208<<14 | 0x59<<7 | 0x24, + 26383 - 19968: jis0208<<14 | 0x3A<<7 | 0x0B, + 26387 - 19968: jis0212<<14 | 0x21<<7 | 0x50, + 26388 - 19968: jis0208<<14 | 0x19<<7 | 0x52, + 26389 - 19968: jis0208<<14 | 0x23<<7 | 0x1E, + 26390 - 19968: jis0208<<14 | 0x3A<<7 | 0x0C, + 26391 - 19968: jis0208<<14 | 0x2E<<7 | 0x0E, + 26393 - 19968: jis0212<<14 | 0x21<<7 | 0x51, + 26395 - 19968: jis0208<<14 | 0x2A<<7 | 0x1D, + 26396 - 19968: jis0212<<14 | 0x21<<7 | 0x52, + 26397 - 19968: jis0208<<14 | 0x23<<7 | 0x0A, + 26398 - 19968: jis0208<<14 | 0x3A<<7 | 0x0D, + 26399 - 19968: jis0208<<14 | 0x13<<7 | 0x5B, + 26400 - 19968: jis0212<<14 | 0x21<<7 | 0x53, + 26402 - 19968: jis0212<<14 | 0x21<<7 | 0x54, + 26406 - 19968: jis0208<<14 | 0x3A<<7 | 0x0E, + 26407 - 19968: jis0208<<14 | 0x3A<<7 | 0x0F, + 26408 - 19968: jis0208<<14 | 0x2B<<7 | 0x39, + 26410 - 19968: jis0208<<14 | 0x2B<<7 | 0x03, + 26411 - 19968: jis0208<<14 | 0x2A<<7 | 0x55, + 26412 - 19968: jis0208<<14 | 0x2A<<7 | 0x3B, + 26413 - 19968: jis0208<<14 | 0x1A<<7 | 0x04, + 26414 - 19968: jis0208<<14 | 0x3A<<7 | 0x11, + 26417 - 19968: jis0208<<14 | 0x1B<<7 | 0x4A, + 26419 - 19968: jis0212<<14 | 0x21<<7 | 0x55, + 26420 - 19968: jis0208<<14 | 0x2A<<7 | 0x30, + 26422 - 19968: jis0208<<14 | 0x3A<<7 | 0x13, + 26423 - 19968: jis0208<<14 | 0x3A<<7 | 0x16, + 26424 - 19968: jis0208<<14 | 0x3A<<7 | 0x15, + 26426 - 19968: jis0208<<14 | 0x13<<7 | 0x58, + 26429 - 19968: jis0208<<14 | 0x14<<7 | 0x3F, + 26430 - 19968: jis0212<<14 | 0x21<<7 | 0x56, + 26431 - 19968: jis0208<<14 | 0x3A<<7 | 0x12, + 26433 - 19968: jis0208<<14 | 0x3A<<7 | 0x14, + 26437 - 19968: jis0212<<14 | 0x21<<7 | 0x57, + 26438 - 19968: jis0208<<14 | 0x3A<<7 | 0x17, + 26439 - 19968: jis0212<<14 | 0x21<<7 | 0x58, + 26440 - 19968: jis0212<<14 | 0x21<<7 | 0x59, + 26441 - 19968: jis0208<<14 | 0x1E<<7 | 0x58, + 26444 - 19968: jis0212<<14 | 0x21<<7 | 0x5A, + 26446 - 19968: jis0208<<14 | 0x2C<<7 | 0x5A, + 26447 - 19968: jis0208<<14 | 0x0F<<7 | 0x28, + 26448 - 19968: jis0208<<14 | 0x19<<7 | 0x3F, + 26449 - 19968: jis0208<<14 | 0x21<<7 | 0x1B, + 26451 - 19968: jis0208<<14 | 0x1B<<7 | 0x3C, + 26452 - 19968: jis0212<<14 | 0x21<<7 | 0x5B, + 26453 - 19968: jis0212<<14 | 0x21<<7 | 0x5C, + 26454 - 19968: jis0208<<14 | 0x1D<<7 | 0x52, + 26457 - 19968: jis0208<<14 | 0x3A<<7 | 0x1A, + 26460 - 19968: jis0208<<14 | 0x24<<7 | 0x2D, + 26461 - 19968: jis0212<<14 | 0x21<<7 | 0x5D, + 26462 - 19968: jis0208<<14 | 0x3A<<7 | 0x18, + 26463 - 19968: jis0208<<14 | 0x21<<7 | 0x0A, + 26464 - 19968: jis0208<<14 | 0x3A<<7 | 0x19, + 26465 - 19968: jis0208<<14 | 0x1D<<7 | 0x51, + 26466 - 19968: jis0208<<14 | 0x2B<<7 | 0x3C, + 26467 - 19968: jis0208<<14 | 0x3A<<7 | 0x1B, + 26468 - 19968: jis0208<<14 | 0x3A<<7 | 0x1C, + 26469 - 19968: jis0208<<14 | 0x2C<<7 | 0x47, + 26470 - 19968: jis0208<<14 | 0x59<<7 | 0x26, + 26474 - 19968: jis0208<<14 | 0x3A<<7 | 0x21, + 26476 - 19968: jis0212<<14 | 0x22<<7 | 0x01, + 26477 - 19968: jis0208<<14 | 0x18<<7 | 0x19, + 26478 - 19968: jis0212<<14 | 0x22<<7 | 0x02, + 26479 - 19968: jis0208<<14 | 0x26<<7 | 0x34, + 26480 - 19968: jis0208<<14 | 0x3A<<7 | 0x1E, + 26481 - 19968: jis0208<<14 | 0x24<<7 | 0x4B, + 26482 - 19968: jis0208<<14 | 0x39<<7 | 0x3D, + 26483 - 19968: jis0208<<14 | 0x39<<7 | 0x41, + 26484 - 19968: jis0212<<14 | 0x22<<7 | 0x03, + 26485 - 19968: jis0208<<14 | 0x14<<7 | 0x2E, + 26486 - 19968: jis0212<<14 | 0x22<<7 | 0x04, + 26487 - 19968: jis0208<<14 | 0x26<<7 | 0x26, + 26491 - 19968: jis0212<<14 | 0x22<<7 | 0x05, + 26492 - 19968: jis0208<<14 | 0x3A<<7 | 0x20, + 26494 - 19968: jis0208<<14 | 0x1D<<7 | 0x1D, + 26495 - 19968: jis0208<<14 | 0x27<<7 | 0x23, + 26497 - 19968: jis0212<<14 | 0x22<<7 | 0x06, + 26500 - 19968: jis0212<<14 | 0x22<<7 | 0x07, + 26501 - 19968: jis0208<<14 | 0x3A<<7 | 0x26, + 26503 - 19968: jis0208<<14 | 0x27<<7 | 0x59, + 26505 - 19968: jis0208<<14 | 0x3A<<7 | 0x1D, + 26507 - 19968: jis0208<<14 | 0x3A<<7 | 0x23, + 26508 - 19968: jis0208<<14 | 0x3A<<7 | 0x22, + 26510 - 19968: jis0212<<14 | 0x22<<7 | 0x08, + 26511 - 19968: jis0212<<14 | 0x22<<7 | 0x09, + 26512 - 19968: jis0208<<14 | 0x1F<<7 | 0x2E, + 26513 - 19968: jis0212<<14 | 0x22<<7 | 0x0A, + 26515 - 19968: jis0212<<14 | 0x22<<7 | 0x0B, + 26517 - 19968: jis0208<<14 | 0x2A<<7 | 0x4C, + 26518 - 19968: jis0212<<14 | 0x22<<7 | 0x0C, + 26519 - 19968: jis0208<<14 | 0x2D<<7 | 0x32, + 26520 - 19968: jis0212<<14 | 0x22<<7 | 0x0D, + 26521 - 19968: jis0212<<14 | 0x22<<7 | 0x0E, + 26522 - 19968: jis0208<<14 | 0x2A<<7 | 0x46, + 26523 - 19968: jis0212<<14 | 0x22<<7 | 0x0F, + 26524 - 19968: jis0208<<14 | 0x11<<7 | 0x2B, + 26525 - 19968: jis0208<<14 | 0x1A<<7 | 0x3D, + 26528 - 19968: jis0208<<14 | 0x2E<<7 | 0x27, + 26529 - 19968: jis0208<<14 | 0x3A<<7 | 0x25, + 26530 - 19968: jis0208<<14 | 0x1E<<7 | 0x54, + 26534 - 19968: jis0208<<14 | 0x3A<<7 | 0x24, + 26537 - 19968: jis0208<<14 | 0x3A<<7 | 0x1F, + 26543 - 19968: jis0208<<14 | 0x17<<7 | 0x2E, + 26544 - 19968: jis0212<<14 | 0x22<<7 | 0x10, + 26545 - 19968: jis0212<<14 | 0x22<<7 | 0x11, + 26546 - 19968: jis0212<<14 | 0x22<<7 | 0x12, + 26547 - 19968: jis0208<<14 | 0x3A<<7 | 0x2B, + 26548 - 19968: jis0208<<14 | 0x3A<<7 | 0x29, + 26549 - 19968: jis0212<<14 | 0x22<<7 | 0x13, + 26550 - 19968: jis0208<<14 | 0x11<<7 | 0x2C, + 26551 - 19968: jis0208<<14 | 0x3A<<7 | 0x27, + 26552 - 19968: jis0208<<14 | 0x3A<<7 | 0x2D, + 26553 - 19968: jis0208<<14 | 0x3A<<7 | 0x33, + 26555 - 19968: jis0208<<14 | 0x59<<7 | 0x27, + 26556 - 19968: jis0212<<14 | 0x22<<7 | 0x15, + 26557 - 19968: jis0212<<14 | 0x22<<7 | 0x16, + 26560 - 19968: jis0208<<14 | 0x59<<7 | 0x29, + 26561 - 19968: jis0208<<14 | 0x21<<7 | 0x27, + 26562 - 19968: jis0212<<14 | 0x22<<7 | 0x19, + 26563 - 19968: jis0212<<14 | 0x22<<7 | 0x1A, + 26564 - 19968: jis0208<<14 | 0x29<<7 | 0x20, + 26565 - 19968: jis0212<<14 | 0x22<<7 | 0x1B, + 26566 - 19968: jis0208<<14 | 0x3A<<7 | 0x35, + 26568 - 19968: jis0212<<14 | 0x22<<7 | 0x1C, + 26569 - 19968: jis0212<<14 | 0x22<<7 | 0x1D, + 26570 - 19968: jis0208<<14 | 0x28<<7 | 0x01, + 26574 - 19968: jis0208<<14 | 0x3A<<7 | 0x34, + 26575 - 19968: jis0208<<14 | 0x26<<7 | 0x4F, + 26576 - 19968: jis0208<<14 | 0x2A<<7 | 0x1E, + 26577 - 19968: jis0208<<14 | 0x13<<7 | 0x1A, + 26578 - 19968: jis0212<<14 | 0x22<<7 | 0x1E, + 26579 - 19968: jis0208<<14 | 0x1F<<7 | 0x56, + 26580 - 19968: jis0208<<14 | 0x1C<<7 | 0x1F, + 26583 - 19968: jis0212<<14 | 0x22<<7 | 0x1F, + 26584 - 19968: jis0208<<14 | 0x23<<7 | 0x32, + 26585 - 19968: jis0212<<14 | 0x22<<7 | 0x20, + 26586 - 19968: jis0208<<14 | 0x2C<<7 | 0x0D, + 26588 - 19968: jis0212<<14 | 0x22<<7 | 0x21, + 26589 - 19968: jis0208<<14 | 0x3A<<7 | 0x30, + 26590 - 19968: jis0208<<14 | 0x3A<<7 | 0x2F, + 26593 - 19968: jis0212<<14 | 0x22<<7 | 0x22, + 26594 - 19968: jis0208<<14 | 0x3A<<7 | 0x31, + 26596 - 19968: jis0208<<14 | 0x3A<<7 | 0x2E, + 26598 - 19968: jis0212<<14 | 0x22<<7 | 0x23, + 26599 - 19968: jis0208<<14 | 0x3A<<7 | 0x36, + 26601 - 19968: jis0208<<14 | 0x3A<<7 | 0x2C, + 26604 - 19968: jis0208<<14 | 0x3A<<7 | 0x2A, + 26606 - 19968: jis0208<<14 | 0x3A<<7 | 0x32, + 26607 - 19968: jis0208<<14 | 0x3A<<7 | 0x28, + 26608 - 19968: jis0212<<14 | 0x22<<7 | 0x24, + 26609 - 19968: jis0208<<14 | 0x22<<7 | 0x4B, + 26610 - 19968: jis0212<<14 | 0x22<<7 | 0x25, + 26611 - 19968: jis0208<<14 | 0x2B<<7 | 0x57, + 26612 - 19968: jis0208<<14 | 0x1B<<7 | 0x25, + 26613 - 19968: jis0208<<14 | 0x19<<7 | 0x53, + 26614 - 19968: jis0212<<14 | 0x22<<7 | 0x26, + 26615 - 19968: jis0212<<14 | 0x22<<7 | 0x27, + 26617 - 19968: jis0212<<14 | 0x22<<7 | 0x17, + 26619 - 19968: jis0208<<14 | 0x19<<7 | 0x19, + 26622 - 19968: jis0208<<14 | 0x2A<<7 | 0x4E, + 26623 - 19968: jis0208<<14 | 0x12<<7 | 0x20, + 26625 - 19968: jis0208<<14 | 0x59<<7 | 0x2A, + 26626 - 19968: jis0208<<14 | 0x23<<7 | 0x2D, + 26627 - 19968: jis0208<<14 | 0x25<<7 | 0x29, + 26628 - 19968: jis0208<<14 | 0x10<<7 | 0x28, + 26643 - 19968: jis0208<<14 | 0x1F<<7 | 0x51, + 26644 - 19968: jis0212<<14 | 0x22<<7 | 0x29, + 26646 - 19968: jis0208<<14 | 0x1F<<7 | 0x13, + 26647 - 19968: jis0208<<14 | 0x16<<7 | 0x09, + 26649 - 19968: jis0212<<14 | 0x22<<7 | 0x2A, + 26653 - 19968: jis0212<<14 | 0x22<<7 | 0x2B, + 26654 - 19968: jis0208<<14 | 0x3A<<7 | 0x38, + 26655 - 19968: jis0212<<14 | 0x22<<7 | 0x2C, + 26657 - 19968: jis0208<<14 | 0x18<<7 | 0x1A, + 26658 - 19968: jis0208<<14 | 0x12<<7 | 0x5B, + 26663 - 19968: jis0212<<14 | 0x22<<7 | 0x2E, + 26664 - 19968: jis0212<<14 | 0x22<<7 | 0x2D, + 26665 - 19968: jis0208<<14 | 0x3A<<7 | 0x3A, + 26666 - 19968: jis0208<<14 | 0x12<<7 | 0x53, + 26667 - 19968: jis0208<<14 | 0x3A<<7 | 0x40, + 26668 - 19968: jis0212<<14 | 0x22<<7 | 0x2F, + 26669 - 19968: jis0212<<14 | 0x22<<7 | 0x30, + 26671 - 19968: jis0212<<14 | 0x22<<7 | 0x31, + 26672 - 19968: jis0212<<14 | 0x22<<7 | 0x32, + 26673 - 19968: jis0212<<14 | 0x22<<7 | 0x33, + 26674 - 19968: jis0208<<14 | 0x3A<<7 | 0x3D, + 26675 - 19968: jis0212<<14 | 0x22<<7 | 0x34, + 26676 - 19968: jis0208<<14 | 0x1F<<7 | 0x52, + 26680 - 19968: jis0208<<14 | 0x12<<7 | 0x2A, + 26681 - 19968: jis0208<<14 | 0x19<<7 | 0x0B, + 26683 - 19968: jis0212<<14 | 0x22<<7 | 0x35, + 26684 - 19968: jis0208<<14 | 0x12<<7 | 0x29, + 26685 - 19968: jis0208<<14 | 0x19<<7 | 0x2E, + 26687 - 19968: jis0212<<14 | 0x22<<7 | 0x36, + 26688 - 19968: jis0208<<14 | 0x3A<<7 | 0x3B, + 26689 - 19968: jis0208<<14 | 0x16<<7 | 0x44, + 26690 - 19968: jis0208<<14 | 0x16<<7 | 0x2A, + 26691 - 19968: jis0208<<14 | 0x24<<7 | 0x4C, + 26692 - 19968: jis0208<<14 | 0x59<<7 | 0x2B, + 26693 - 19968: jis0212<<14 | 0x22<<7 | 0x38, + 26694 - 19968: jis0208<<14 | 0x3A<<7 | 0x39, + 26696 - 19968: jis0208<<14 | 0x0F<<7 | 0x25, + 26698 - 19968: jis0212<<14 | 0x22<<7 | 0x39, + 26700 - 19968: jis0212<<14 | 0x22<<7 | 0x3A, + 26701 - 19968: jis0208<<14 | 0x3A<<7 | 0x3C, + 26702 - 19968: jis0208<<14 | 0x3A<<7 | 0x3E, + 26704 - 19968: jis0208<<14 | 0x15<<7 | 0x2C, + 26705 - 19968: jis0208<<14 | 0x16<<7 | 0x0B, + 26706 - 19968: jis0208<<14 | 0x59<<7 | 0x28, + 26707 - 19968: jis0208<<14 | 0x13<<7 | 0x1B, + 26708 - 19968: jis0208<<14 | 0x14<<7 | 0x2A, + 26709 - 19968: jis0212<<14 | 0x22<<7 | 0x3B, + 26711 - 19968: jis0212<<14 | 0x22<<7 | 0x3C, + 26712 - 19968: jis0212<<14 | 0x22<<7 | 0x3D, + 26713 - 19968: jis0208<<14 | 0x3A<<7 | 0x41, + 26715 - 19968: jis0212<<14 | 0x22<<7 | 0x3E, + 26716 - 19968: jis0208<<14 | 0x19<<7 | 0x58, + 26717 - 19968: jis0208<<14 | 0x2A<<7 | 0x50, + 26719 - 19968: jis0208<<14 | 0x1A<<7 | 0x16, + 26723 - 19968: jis0208<<14 | 0x3A<<7 | 0x42, + 26727 - 19968: jis0208<<14 | 0x28<<7 | 0x0F, + 26731 - 19968: jis0212<<14 | 0x22<<7 | 0x3F, + 26734 - 19968: jis0212<<14 | 0x22<<7 | 0x40, + 26735 - 19968: jis0212<<14 | 0x22<<7 | 0x41, + 26736 - 19968: jis0212<<14 | 0x22<<7 | 0x42, + 26737 - 19968: jis0212<<14 | 0x22<<7 | 0x43, + 26738 - 19968: jis0212<<14 | 0x22<<7 | 0x44, + 26740 - 19968: jis0208<<14 | 0x3A<<7 | 0x4E, + 26741 - 19968: jis0212<<14 | 0x22<<7 | 0x45, + 26742 - 19968: jis0208<<14 | 0x11<<7 | 0x12, + 26743 - 19968: jis0208<<14 | 0x3A<<7 | 0x43, + 26745 - 19968: jis0212<<14 | 0x22<<7 | 0x46, + 26746 - 19968: jis0212<<14 | 0x22<<7 | 0x47, + 26747 - 19968: jis0212<<14 | 0x22<<7 | 0x48, + 26748 - 19968: jis0212<<14 | 0x22<<7 | 0x49, + 26750 - 19968: jis0208<<14 | 0x3A<<7 | 0x54, + 26751 - 19968: jis0208<<14 | 0x3A<<7 | 0x44, + 26753 - 19968: jis0208<<14 | 0x2D<<7 | 0x21, + 26754 - 19968: jis0212<<14 | 0x22<<7 | 0x4A, + 26755 - 19968: jis0208<<14 | 0x3A<<7 | 0x4B, + 26756 - 19968: jis0212<<14 | 0x22<<7 | 0x4B, + 26757 - 19968: jis0208<<14 | 0x26<<7 | 0x3E, + 26758 - 19968: jis0212<<14 | 0x22<<7 | 0x4C, + 26760 - 19968: jis0212<<14 | 0x22<<7 | 0x4D, + 26765 - 19968: jis0208<<14 | 0x3A<<7 | 0x53, + 26767 - 19968: jis0208<<14 | 0x3A<<7 | 0x46, + 26771 - 19968: jis0208<<14 | 0x0F<<7 | 0x13, + 26772 - 19968: jis0208<<14 | 0x3A<<7 | 0x48, + 26774 - 19968: jis0212<<14 | 0x22<<7 | 0x4E, + 26775 - 19968: jis0208<<14 | 0x18<<7 | 0x1B, + 26776 - 19968: jis0212<<14 | 0x22<<7 | 0x4F, + 26778 - 19968: jis0212<<14 | 0x22<<7 | 0x50, + 26779 - 19968: jis0208<<14 | 0x3A<<7 | 0x4A, + 26780 - 19968: jis0212<<14 | 0x22<<7 | 0x51, + 26781 - 19968: jis0208<<14 | 0x3A<<7 | 0x49, + 26783 - 19968: jis0208<<14 | 0x3A<<7 | 0x45, + 26784 - 19968: jis0208<<14 | 0x3A<<7 | 0x50, + 26785 - 19968: jis0212<<14 | 0x22<<7 | 0x52, + 26786 - 19968: jis0208<<14 | 0x1D<<7 | 0x1E, + 26787 - 19968: jis0212<<14 | 0x22<<7 | 0x53, + 26789 - 19968: jis0212<<14 | 0x22<<7 | 0x54, + 26790 - 19968: jis0208<<14 | 0x33<<7 | 0x4C, + 26791 - 19968: jis0208<<14 | 0x17<<7 | 0x47, + 26792 - 19968: jis0208<<14 | 0x2C<<7 | 0x5B, + 26793 - 19968: jis0212<<14 | 0x22<<7 | 0x55, + 26794 - 19968: jis0212<<14 | 0x22<<7 | 0x56, + 26797 - 19968: jis0208<<14 | 0x3A<<7 | 0x47, + 26798 - 19968: jis0212<<14 | 0x22<<7 | 0x57, + 26799 - 19968: jis0208<<14 | 0x23<<7 | 0x53, + 26800 - 19968: jis0208<<14 | 0x12<<7 | 0x02, + 26801 - 19968: jis0208<<14 | 0x19<<7 | 0x0C, + 26802 - 19968: jis0212<<14 | 0x22<<7 | 0x58, + 26803 - 19968: jis0208<<14 | 0x3A<<7 | 0x3F, + 26805 - 19968: jis0208<<14 | 0x3A<<7 | 0x4F, + 26806 - 19968: jis0208<<14 | 0x12<<7 | 0x40, + 26809 - 19968: jis0208<<14 | 0x3A<<7 | 0x4D, + 26810 - 19968: jis0208<<14 | 0x3A<<7 | 0x51, + 26811 - 19968: jis0212<<14 | 0x22<<7 | 0x59, + 26812 - 19968: jis0208<<14 | 0x24<<7 | 0x4D, + 26820 - 19968: jis0208<<14 | 0x13<<7 | 0x5D, + 26821 - 19968: jis0212<<14 | 0x22<<7 | 0x5A, + 26822 - 19968: jis0208<<14 | 0x3B<<7 | 0x11, + 26824 - 19968: jis0208<<14 | 0x58<<7 | 0x08, + 26825 - 19968: jis0208<<14 | 0x2B<<7 | 0x28, + 26826 - 19968: jis0208<<14 | 0x3A<<7 | 0x56, + 26827 - 19968: jis0208<<14 | 0x13<<7 | 0x5C, + 26828 - 19968: jis0212<<14 | 0x22<<7 | 0x5C, + 26829 - 19968: jis0208<<14 | 0x3A<<7 | 0x5D, + 26831 - 19968: jis0208<<14 | 0x59<<7 | 0x2C, + 26832 - 19968: jis0212<<14 | 0x23<<7 | 0x00, + 26833 - 19968: jis0212<<14 | 0x23<<7 | 0x01, + 26834 - 19968: jis0208<<14 | 0x2A<<7 | 0x1F, + 26835 - 19968: jis0212<<14 | 0x23<<7 | 0x02, + 26836 - 19968: jis0208<<14 | 0x3B<<7 | 0x00, + 26837 - 19968: jis0208<<14 | 0x3B<<7 | 0x02, + 26838 - 19968: jis0212<<14 | 0x23<<7 | 0x03, + 26839 - 19968: jis0208<<14 | 0x3B<<7 | 0x06, + 26840 - 19968: jis0208<<14 | 0x3A<<7 | 0x58, + 26841 - 19968: jis0212<<14 | 0x23<<7 | 0x04, + 26842 - 19968: jis0208<<14 | 0x22<<7 | 0x09, + 26844 - 19968: jis0212<<14 | 0x23<<7 | 0x05, + 26845 - 19968: jis0212<<14 | 0x23<<7 | 0x06, + 26847 - 19968: jis0208<<14 | 0x24<<7 | 0x4E, + 26848 - 19968: jis0208<<14 | 0x3B<<7 | 0x0A, + 26849 - 19968: jis0208<<14 | 0x3A<<7 | 0x5B, + 26851 - 19968: jis0208<<14 | 0x3B<<7 | 0x07, + 26853 - 19968: jis0212<<14 | 0x23<<7 | 0x07, + 26855 - 19968: jis0208<<14 | 0x3B<<7 | 0x01, + 26856 - 19968: jis0212<<14 | 0x23<<7 | 0x08, + 26858 - 19968: jis0212<<14 | 0x23<<7 | 0x09, + 26859 - 19968: jis0212<<14 | 0x23<<7 | 0x0A, + 26860 - 19968: jis0212<<14 | 0x23<<7 | 0x0B, + 26861 - 19968: jis0212<<14 | 0x23<<7 | 0x0C, + 26862 - 19968: jis0208<<14 | 0x1E<<7 | 0x18, + 26863 - 19968: jis0208<<14 | 0x3B<<7 | 0x0B, + 26864 - 19968: jis0212<<14 | 0x23<<7 | 0x0D, + 26865 - 19968: jis0212<<14 | 0x23<<7 | 0x0E, + 26866 - 19968: jis0208<<14 | 0x1F<<7 | 0x12, + 26869 - 19968: jis0212<<14 | 0x23<<7 | 0x0F, + 26870 - 19968: jis0212<<14 | 0x23<<7 | 0x10, + 26873 - 19968: jis0208<<14 | 0x3B<<7 | 0x09, + 26874 - 19968: jis0208<<14 | 0x13<<7 | 0x1C, + 26875 - 19968: jis0212<<14 | 0x23<<7 | 0x11, + 26876 - 19968: jis0212<<14 | 0x23<<7 | 0x12, + 26877 - 19968: jis0212<<14 | 0x23<<7 | 0x13, + 26880 - 19968: jis0208<<14 | 0x2E<<7 | 0x2F, + 26881 - 19968: jis0208<<14 | 0x3A<<7 | 0x55, + 26884 - 19968: jis0208<<14 | 0x3B<<7 | 0x05, + 26885 - 19968: jis0208<<14 | 0x0F<<7 | 0x37, + 26886 - 19968: jis0212<<14 | 0x23<<7 | 0x14, + 26888 - 19968: jis0208<<14 | 0x3A<<7 | 0x57, + 26889 - 19968: jis0212<<14 | 0x23<<7 | 0x15, + 26890 - 19968: jis0212<<14 | 0x23<<7 | 0x16, + 26891 - 19968: jis0208<<14 | 0x2B<<7 | 0x19, + 26892 - 19968: jis0208<<14 | 0x3A<<7 | 0x5C, + 26893 - 19968: jis0208<<14 | 0x1E<<7 | 0x01, + 26894 - 19968: jis0208<<14 | 0x23<<7 | 0x26, + 26895 - 19968: jis0208<<14 | 0x3A<<7 | 0x52, + 26896 - 19968: jis0212<<14 | 0x23<<7 | 0x17, + 26897 - 19968: jis0212<<14 | 0x23<<7 | 0x18, + 26898 - 19968: jis0208<<14 | 0x3B<<7 | 0x04, + 26899 - 19968: jis0212<<14 | 0x23<<7 | 0x19, + 26902 - 19968: jis0212<<14 | 0x23<<7 | 0x1A, + 26903 - 19968: jis0212<<14 | 0x23<<7 | 0x1B, + 26905 - 19968: jis0208<<14 | 0x1E<<7 | 0x59, + 26906 - 19968: jis0208<<14 | 0x3B<<7 | 0x0E, + 26907 - 19968: jis0208<<14 | 0x12<<7 | 0x50, + 26908 - 19968: jis0208<<14 | 0x17<<7 | 0x00, + 26913 - 19968: jis0208<<14 | 0x3B<<7 | 0x10, + 26914 - 19968: jis0208<<14 | 0x3A<<7 | 0x59, + 26915 - 19968: jis0208<<14 | 0x3B<<7 | 0x0F, + 26917 - 19968: jis0208<<14 | 0x3B<<7 | 0x08, + 26918 - 19968: jis0208<<14 | 0x3A<<7 | 0x5A, + 26920 - 19968: jis0208<<14 | 0x3B<<7 | 0x0C, + 26922 - 19968: jis0208<<14 | 0x3B<<7 | 0x0D, + 26928 - 19968: jis0208<<14 | 0x3B<<7 | 0x1E, + 26929 - 19968: jis0212<<14 | 0x23<<7 | 0x1C, + 26931 - 19968: jis0212<<14 | 0x23<<7 | 0x1D, + 26932 - 19968: jis0208<<14 | 0x25<<7 | 0x2D, + 26933 - 19968: jis0212<<14 | 0x23<<7 | 0x1E, + 26934 - 19968: jis0208<<14 | 0x3B<<7 | 0x03, + 26936 - 19968: jis0212<<14 | 0x23<<7 | 0x1F, + 26937 - 19968: jis0208<<14 | 0x3B<<7 | 0x1A, + 26939 - 19968: jis0212<<14 | 0x23<<7 | 0x20, + 26941 - 19968: jis0208<<14 | 0x3B<<7 | 0x1C, + 26943 - 19968: jis0208<<14 | 0x23<<7 | 0x37, + 26946 - 19968: jis0212<<14 | 0x23<<7 | 0x21, + 26949 - 19968: jis0212<<14 | 0x23<<7 | 0x22, + 26953 - 19968: jis0212<<14 | 0x23<<7 | 0x23, + 26954 - 19968: jis0208<<14 | 0x2C<<7 | 0x2B, + 26958 - 19968: jis0212<<14 | 0x23<<7 | 0x24, + 26963 - 19968: jis0208<<14 | 0x28<<7 | 0x55, + 26964 - 19968: jis0208<<14 | 0x3B<<7 | 0x17, + 26965 - 19968: jis0208<<14 | 0x21<<7 | 0x29, + 26967 - 19968: jis0212<<14 | 0x23<<7 | 0x25, + 26969 - 19968: jis0208<<14 | 0x3B<<7 | 0x1D, + 26970 - 19968: jis0208<<14 | 0x20<<7 | 0x1E, + 26971 - 19968: jis0212<<14 | 0x23<<7 | 0x26, + 26972 - 19968: jis0208<<14 | 0x3B<<7 | 0x14, + 26973 - 19968: jis0208<<14 | 0x3B<<7 | 0x21, + 26974 - 19968: jis0208<<14 | 0x3B<<7 | 0x20, + 26976 - 19968: jis0208<<14 | 0x25<<7 | 0x4E, + 26977 - 19968: jis0208<<14 | 0x3B<<7 | 0x1F, + 26978 - 19968: jis0208<<14 | 0x25<<7 | 0x49, + 26979 - 19968: jis0212<<14 | 0x23<<7 | 0x27, + 26980 - 19968: jis0212<<14 | 0x23<<7 | 0x28, + 26981 - 19968: jis0212<<14 | 0x23<<7 | 0x29, + 26982 - 19968: jis0212<<14 | 0x23<<7 | 0x2A, + 26984 - 19968: jis0208<<14 | 0x59<<7 | 0x2E, + 26985 - 19968: jis0212<<14 | 0x23<<7 | 0x2C, + 26986 - 19968: jis0208<<14 | 0x3B<<7 | 0x23, + 26987 - 19968: jis0208<<14 | 0x3B<<7 | 0x16, + 26988 - 19968: jis0212<<14 | 0x23<<7 | 0x2D, + 26989 - 19968: jis0208<<14 | 0x15<<7 | 0x27, + 26990 - 19968: jis0208<<14 | 0x3B<<7 | 0x19, + 26991 - 19968: jis0208<<14 | 0x1C<<7 | 0x3C, + 26992 - 19968: jis0212<<14 | 0x23<<7 | 0x2E, + 26993 - 19968: jis0212<<14 | 0x23<<7 | 0x2F, + 26994 - 19968: jis0212<<14 | 0x23<<7 | 0x30, + 26995 - 19968: jis0208<<14 | 0x26<<7 | 0x3F, + 26996 - 19968: jis0208<<14 | 0x3B<<7 | 0x1B, + 26997 - 19968: jis0208<<14 | 0x15<<7 | 0x2A, + 26999 - 19968: jis0208<<14 | 0x3B<<7 | 0x13, + 27000 - 19968: jis0208<<14 | 0x3B<<7 | 0x15, + 27001 - 19968: jis0208<<14 | 0x3B<<7 | 0x12, + 27002 - 19968: jis0212<<14 | 0x23<<7 | 0x31, + 27003 - 19968: jis0212<<14 | 0x23<<7 | 0x32, + 27004 - 19968: jis0208<<14 | 0x2E<<7 | 0x0F, + 27005 - 19968: jis0208<<14 | 0x12<<7 | 0x39, + 27006 - 19968: jis0208<<14 | 0x3B<<7 | 0x18, + 27007 - 19968: jis0212<<14 | 0x23<<7 | 0x33, + 27008 - 19968: jis0212<<14 | 0x23<<7 | 0x34, + 27009 - 19968: jis0208<<14 | 0x3B<<7 | 0x22, + 27010 - 19968: jis0208<<14 | 0x12<<7 | 0x14, + 27018 - 19968: jis0208<<14 | 0x19<<7 | 0x46, + 27021 - 19968: jis0212<<14 | 0x23<<7 | 0x35, + 27022 - 19968: jis0208<<14 | 0x10<<7 | 0x3C, + 27025 - 19968: jis0208<<14 | 0x3B<<7 | 0x33, + 27026 - 19968: jis0212<<14 | 0x23<<7 | 0x36, + 27028 - 19968: jis0208<<14 | 0x2E<<7 | 0x10, + 27029 - 19968: jis0208<<14 | 0x3B<<7 | 0x36, + 27030 - 19968: jis0212<<14 | 0x23<<7 | 0x37, + 27032 - 19968: jis0208<<14 | 0x59<<7 | 0x30, + 27035 - 19968: jis0208<<14 | 0x1E<<7 | 0x19, + 27036 - 19968: jis0208<<14 | 0x3B<<7 | 0x35, + 27040 - 19968: jis0208<<14 | 0x3B<<7 | 0x34, + 27041 - 19968: jis0212<<14 | 0x23<<7 | 0x39, + 27045 - 19968: jis0212<<14 | 0x23<<7 | 0x3A, + 27046 - 19968: jis0212<<14 | 0x23<<7 | 0x3B, + 27047 - 19968: jis0208<<14 | 0x3B<<7 | 0x31, + 27048 - 19968: jis0212<<14 | 0x23<<7 | 0x3C, + 27051 - 19968: jis0212<<14 | 0x23<<7 | 0x3D, + 27053 - 19968: jis0212<<14 | 0x23<<7 | 0x3E, + 27054 - 19968: jis0208<<14 | 0x3B<<7 | 0x25, + 27055 - 19968: jis0212<<14 | 0x23<<7 | 0x3F, + 27057 - 19968: jis0208<<14 | 0x3B<<7 | 0x42, + 27058 - 19968: jis0208<<14 | 0x3B<<7 | 0x24, + 27060 - 19968: jis0208<<14 | 0x3B<<7 | 0x37, + 27063 - 19968: jis0212<<14 | 0x23<<7 | 0x40, + 27064 - 19968: jis0212<<14 | 0x23<<7 | 0x41, + 27066 - 19968: jis0212<<14 | 0x23<<7 | 0x42, + 27067 - 19968: jis0208<<14 | 0x3B<<7 | 0x2F, + 27068 - 19968: jis0212<<14 | 0x23<<7 | 0x43, + 27070 - 19968: jis0208<<14 | 0x3B<<7 | 0x2A, + 27071 - 19968: jis0208<<14 | 0x3B<<7 | 0x27, + 27073 - 19968: jis0208<<14 | 0x3B<<7 | 0x28, + 27075 - 19968: jis0208<<14 | 0x3B<<7 | 0x30, + 27077 - 19968: jis0212<<14 | 0x23<<7 | 0x44, + 27079 - 19968: jis0208<<14 | 0x53<<7 | 0x01, + 27080 - 19968: jis0212<<14 | 0x23<<7 | 0x45, + 27082 - 19968: jis0208<<14 | 0x3B<<7 | 0x2D, + 27083 - 19968: jis0208<<14 | 0x18<<7 | 0x1C, + 27084 - 19968: jis0208<<14 | 0x23<<7 | 0x27, + 27085 - 19968: jis0208<<14 | 0x20<<7 | 0x43, + 27086 - 19968: jis0208<<14 | 0x3B<<7 | 0x2B, + 27088 - 19968: jis0208<<14 | 0x3B<<7 | 0x26, + 27089 - 19968: jis0212<<14 | 0x23<<7 | 0x46, + 27091 - 19968: jis0208<<14 | 0x3B<<7 | 0x29, + 27094 - 19968: jis0212<<14 | 0x23<<7 | 0x47, + 27095 - 19968: jis0212<<14 | 0x23<<7 | 0x48, + 27096 - 19968: jis0208<<14 | 0x2C<<7 | 0x2C, + 27097 - 19968: jis0208<<14 | 0x2A<<7 | 0x49, + 27101 - 19968: jis0208<<14 | 0x3B<<7 | 0x2E, + 27102 - 19968: jis0208<<14 | 0x3B<<7 | 0x38, + 27106 - 19968: jis0208<<14 | 0x59<<7 | 0x31, + 27109 - 19968: jis0212<<14 | 0x23<<7 | 0x4A, + 27111 - 19968: jis0208<<14 | 0x3B<<7 | 0x40, + 27112 - 19968: jis0208<<14 | 0x3B<<7 | 0x39, + 27115 - 19968: jis0208<<14 | 0x3B<<7 | 0x46, + 27117 - 19968: jis0208<<14 | 0x3B<<7 | 0x44, + 27118 - 19968: jis0212<<14 | 0x23<<7 | 0x4B, + 27119 - 19968: jis0212<<14 | 0x23<<7 | 0x4C, + 27121 - 19968: jis0212<<14 | 0x23<<7 | 0x4D, + 27122 - 19968: jis0208<<14 | 0x3B<<7 | 0x3F, + 27123 - 19968: jis0212<<14 | 0x23<<7 | 0x4E, + 27125 - 19968: jis0212<<14 | 0x23<<7 | 0x4F, + 27129 - 19968: jis0208<<14 | 0x3B<<7 | 0x3E, + 27131 - 19968: jis0208<<14 | 0x23<<7 | 0x2F, + 27133 - 19968: jis0208<<14 | 0x20<<7 | 0x44, + 27134 - 19968: jis0212<<14 | 0x23<<7 | 0x50, + 27135 - 19968: jis0208<<14 | 0x3B<<7 | 0x3C, + 27136 - 19968: jis0212<<14 | 0x23<<7 | 0x51, + 27137 - 19968: jis0212<<14 | 0x23<<7 | 0x52, + 27138 - 19968: jis0208<<14 | 0x3B<<7 | 0x3A, + 27139 - 19968: jis0212<<14 | 0x23<<7 | 0x53, + 27141 - 19968: jis0208<<14 | 0x3B<<7 | 0x41, + 27146 - 19968: jis0208<<14 | 0x3B<<7 | 0x47, + 27147 - 19968: jis0208<<14 | 0x27<<7 | 0x54, + 27148 - 19968: jis0208<<14 | 0x3B<<7 | 0x4D, + 27151 - 19968: jis0212<<14 | 0x23<<7 | 0x54, + 27153 - 19968: jis0212<<14 | 0x23<<7 | 0x55, + 27154 - 19968: jis0208<<14 | 0x3B<<7 | 0x48, + 27155 - 19968: jis0208<<14 | 0x3B<<7 | 0x4B, + 27156 - 19968: jis0208<<14 | 0x3B<<7 | 0x45, + 27157 - 19968: jis0212<<14 | 0x23<<7 | 0x56, + 27159 - 19968: jis0208<<14 | 0x22<<7 | 0x53, + 27161 - 19968: jis0208<<14 | 0x28<<7 | 0x17, + 27162 - 19968: jis0212<<14 | 0x23<<7 | 0x57, + 27163 - 19968: jis0208<<14 | 0x3B<<7 | 0x3B, + 27165 - 19968: jis0212<<14 | 0x23<<7 | 0x58, + 27166 - 19968: jis0208<<14 | 0x3B<<7 | 0x43, + 27167 - 19968: jis0208<<14 | 0x1D<<7 | 0x1F, + 27168 - 19968: jis0212<<14 | 0x23<<7 | 0x59, + 27169 - 19968: jis0208<<14 | 0x2B<<7 | 0x2E, + 27170 - 19968: jis0208<<14 | 0x3B<<7 | 0x57, + 27171 - 19968: jis0208<<14 | 0x3B<<7 | 0x4A, + 27172 - 19968: jis0212<<14 | 0x23<<7 | 0x5A, + 27176 - 19968: jis0212<<14 | 0x23<<7 | 0x5B, + 27177 - 19968: jis0208<<14 | 0x17<<7 | 0x01, + 27178 - 19968: jis0208<<14 | 0x11<<7 | 0x02, + 27179 - 19968: jis0208<<14 | 0x12<<7 | 0x3E, + 27182 - 19968: jis0208<<14 | 0x3B<<7 | 0x32, + 27184 - 19968: jis0208<<14 | 0x59<<7 | 0x32, + 27186 - 19968: jis0212<<14 | 0x23<<7 | 0x5D, + 27188 - 19968: jis0212<<14 | 0x24<<7 | 0x00, + 27189 - 19968: jis0208<<14 | 0x1D<<7 | 0x20, + 27190 - 19968: jis0208<<14 | 0x3B<<7 | 0x4F, + 27191 - 19968: jis0212<<14 | 0x24<<7 | 0x01, + 27192 - 19968: jis0208<<14 | 0x3B<<7 | 0x56, + 27193 - 19968: jis0208<<14 | 0x1B<<7 | 0x58, + 27194 - 19968: jis0208<<14 | 0x12<<7 | 0x51, + 27195 - 19968: jis0212<<14 | 0x24<<7 | 0x02, + 27197 - 19968: jis0208<<14 | 0x22<<7 | 0x0D, + 27198 - 19968: jis0212<<14 | 0x24<<7 | 0x03, + 27199 - 19968: jis0212<<14 | 0x24<<7 | 0x04, + 27204 - 19968: jis0208<<14 | 0x3B<<7 | 0x4C, + 27205 - 19968: jis0212<<14 | 0x24<<7 | 0x05, + 27206 - 19968: jis0208<<14 | 0x59<<7 | 0x34, + 27207 - 19968: jis0208<<14 | 0x3B<<7 | 0x51, + 27208 - 19968: jis0208<<14 | 0x3B<<7 | 0x55, + 27209 - 19968: jis0212<<14 | 0x24<<7 | 0x07, + 27210 - 19968: jis0212<<14 | 0x24<<7 | 0x08, + 27211 - 19968: jis0208<<14 | 0x15<<7 | 0x15, + 27214 - 19968: jis0212<<14 | 0x24<<7 | 0x09, + 27216 - 19968: jis0212<<14 | 0x24<<7 | 0x0A, + 27217 - 19968: jis0212<<14 | 0x24<<7 | 0x0B, + 27218 - 19968: jis0212<<14 | 0x24<<7 | 0x0C, + 27221 - 19968: jis0212<<14 | 0x24<<7 | 0x0D, + 27222 - 19968: jis0212<<14 | 0x24<<7 | 0x0E, + 27224 - 19968: jis0208<<14 | 0x14<<7 | 0x2B, + 27225 - 19968: jis0208<<14 | 0x3B<<7 | 0x53, + 27227 - 19968: jis0212<<14 | 0x24<<7 | 0x0F, + 27231 - 19968: jis0208<<14 | 0x14<<7 | 0x00, + 27233 - 19968: jis0208<<14 | 0x25<<7 | 0x2A, + 27234 - 19968: jis0208<<14 | 0x3B<<7 | 0x52, + 27236 - 19968: jis0212<<14 | 0x24<<7 | 0x10, + 27238 - 19968: jis0208<<14 | 0x3B<<7 | 0x54, + 27239 - 19968: jis0212<<14 | 0x24<<7 | 0x11, + 27242 - 19968: jis0212<<14 | 0x24<<7 | 0x12, + 27243 - 19968: jis0208<<14 | 0x59<<7 | 0x33, + 27249 - 19968: jis0212<<14 | 0x24<<7 | 0x13, + 27250 - 19968: jis0208<<14 | 0x3B<<7 | 0x4E, + 27251 - 19968: jis0208<<14 | 0x59<<7 | 0x35, + 27256 - 19968: jis0208<<14 | 0x3B<<7 | 0x50, + 27262 - 19968: jis0208<<14 | 0x59<<7 | 0x36, + 27263 - 19968: jis0208<<14 | 0x12<<7 | 0x3F, + 27264 - 19968: jis0208<<14 | 0x22<<7 | 0x28, + 27265 - 19968: jis0212<<14 | 0x24<<7 | 0x16, + 27267 - 19968: jis0212<<14 | 0x24<<7 | 0x17, + 27268 - 19968: jis0208<<14 | 0x3B<<7 | 0x5B, + 27270 - 19968: jis0212<<14 | 0x24<<7 | 0x18, + 27271 - 19968: jis0212<<14 | 0x24<<7 | 0x19, + 27273 - 19968: jis0212<<14 | 0x24<<7 | 0x1A, + 27275 - 19968: jis0212<<14 | 0x24<<7 | 0x1B, + 27277 - 19968: jis0208<<14 | 0x3B<<7 | 0x59, + 27278 - 19968: jis0208<<14 | 0x17<<7 | 0x48, + 27280 - 19968: jis0208<<14 | 0x3B<<7 | 0x58, + 27281 - 19968: jis0212<<14 | 0x24<<7 | 0x1C, + 27287 - 19968: jis0208<<14 | 0x3C<<7 | 0x00, + 27291 - 19968: jis0212<<14 | 0x24<<7 | 0x1D, + 27292 - 19968: jis0208<<14 | 0x3A<<7 | 0x37, + 27293 - 19968: jis0212<<14 | 0x24<<7 | 0x1E, + 27294 - 19968: jis0212<<14 | 0x24<<7 | 0x1F, + 27295 - 19968: jis0212<<14 | 0x24<<7 | 0x20, + 27296 - 19968: jis0208<<14 | 0x3B<<7 | 0x5A, + 27298 - 19968: jis0208<<14 | 0x3B<<7 | 0x5C, + 27299 - 19968: jis0208<<14 | 0x3B<<7 | 0x5D, + 27301 - 19968: jis0212<<14 | 0x24<<7 | 0x21, + 27306 - 19968: jis0208<<14 | 0x3C<<7 | 0x0B, + 27307 - 19968: jis0212<<14 | 0x24<<7 | 0x22, + 27308 - 19968: jis0208<<14 | 0x3C<<7 | 0x07, + 27310 - 19968: jis0208<<14 | 0x3A<<7 | 0x4C, + 27311 - 19968: jis0212<<14 | 0x24<<7 | 0x23, + 27312 - 19968: jis0212<<14 | 0x24<<7 | 0x24, + 27313 - 19968: jis0212<<14 | 0x24<<7 | 0x25, + 27315 - 19968: jis0208<<14 | 0x3C<<7 | 0x06, + 27316 - 19968: jis0212<<14 | 0x24<<7 | 0x26, + 27320 - 19968: jis0208<<14 | 0x3C<<7 | 0x05, + 27323 - 19968: jis0208<<14 | 0x3C<<7 | 0x02, + 27325 - 19968: jis0212<<14 | 0x24<<7 | 0x27, + 27326 - 19968: jis0212<<14 | 0x24<<7 | 0x28, + 27327 - 19968: jis0212<<14 | 0x24<<7 | 0x29, + 27329 - 19968: jis0208<<14 | 0x3B<<7 | 0x49, + 27330 - 19968: jis0208<<14 | 0x3C<<7 | 0x04, + 27331 - 19968: jis0208<<14 | 0x3C<<7 | 0x03, + 27334 - 19968: jis0212<<14 | 0x24<<7 | 0x2A, + 27336 - 19968: jis0212<<14 | 0x24<<7 | 0x2C, + 27337 - 19968: jis0212<<14 | 0x24<<7 | 0x2B, + 27340 - 19968: jis0212<<14 | 0x24<<7 | 0x2D, + 27344 - 19968: jis0212<<14 | 0x24<<7 | 0x2E, + 27345 - 19968: jis0208<<14 | 0x3C<<7 | 0x09, + 27347 - 19968: jis0208<<14 | 0x2E<<7 | 0x05, + 27348 - 19968: jis0212<<14 | 0x24<<7 | 0x2F, + 27349 - 19968: jis0212<<14 | 0x24<<7 | 0x30, + 27350 - 19968: jis0212<<14 | 0x24<<7 | 0x31, + 27354 - 19968: jis0208<<14 | 0x3C<<7 | 0x0C, + 27355 - 19968: jis0208<<14 | 0x15<<7 | 0x5A, + 27356 - 19968: jis0212<<14 | 0x24<<7 | 0x32, + 27357 - 19968: jis0212<<14 | 0x24<<7 | 0x33, + 27358 - 19968: jis0208<<14 | 0x3C<<7 | 0x08, + 27359 - 19968: jis0208<<14 | 0x3C<<7 | 0x0A, + 27362 - 19968: jis0208<<14 | 0x59<<7 | 0x37, + 27364 - 19968: jis0208<<14 | 0x59<<7 | 0x38, + 27367 - 19968: jis0212<<14 | 0x24<<7 | 0x35, + 27368 - 19968: jis0208<<14 | 0x27<<7 | 0x06, + 27370 - 19968: jis0208<<14 | 0x3C<<7 | 0x0D, + 27372 - 19968: jis0212<<14 | 0x24<<7 | 0x36, + 27376 - 19968: jis0212<<14 | 0x24<<7 | 0x37, + 27377 - 19968: jis0212<<14 | 0x24<<7 | 0x38, + 27378 - 19968: jis0212<<14 | 0x24<<7 | 0x39, + 27386 - 19968: jis0208<<14 | 0x3C<<7 | 0x11, + 27387 - 19968: jis0208<<14 | 0x3C<<7 | 0x0E, + 27388 - 19968: jis0212<<14 | 0x24<<7 | 0x3A, + 27389 - 19968: jis0212<<14 | 0x24<<7 | 0x3B, + 27394 - 19968: jis0212<<14 | 0x24<<7 | 0x3C, + 27395 - 19968: jis0212<<14 | 0x24<<7 | 0x3D, + 27396 - 19968: jis0208<<14 | 0x2C<<7 | 0x52, + 27397 - 19968: jis0208<<14 | 0x3C<<7 | 0x0F, + 27398 - 19968: jis0212<<14 | 0x24<<7 | 0x3E, + 27399 - 19968: jis0212<<14 | 0x24<<7 | 0x3F, + 27401 - 19968: jis0212<<14 | 0x24<<7 | 0x40, + 27402 - 19968: jis0208<<14 | 0x3B<<7 | 0x3D, + 27407 - 19968: jis0212<<14 | 0x24<<7 | 0x41, + 27408 - 19968: jis0212<<14 | 0x24<<7 | 0x42, + 27409 - 19968: jis0212<<14 | 0x24<<7 | 0x43, + 27410 - 19968: jis0208<<14 | 0x3C<<7 | 0x12, + 27414 - 19968: jis0208<<14 | 0x3C<<7 | 0x13, + 27415 - 19968: jis0212<<14 | 0x24<<7 | 0x44, + 27419 - 19968: jis0212<<14 | 0x24<<7 | 0x45, + 27421 - 19968: jis0208<<14 | 0x10<<7 | 0x14, + 27422 - 19968: jis0212<<14 | 0x24<<7 | 0x46, + 27423 - 19968: jis0208<<14 | 0x3C<<7 | 0x15, + 27424 - 19968: jis0208<<14 | 0x16<<7 | 0x46, + 27425 - 19968: jis0208<<14 | 0x1B<<7 | 0x00, + 27427 - 19968: jis0208<<14 | 0x15<<7 | 0x34, + 27428 - 19968: jis0212<<14 | 0x24<<7 | 0x47, + 27431 - 19968: jis0208<<14 | 0x11<<7 | 0x03, + 27432 - 19968: jis0212<<14 | 0x24<<7 | 0x48, + 27435 - 19968: jis0212<<14 | 0x24<<7 | 0x49, + 27436 - 19968: jis0212<<14 | 0x24<<7 | 0x4A, + 27439 - 19968: jis0212<<14 | 0x24<<7 | 0x4B, + 27442 - 19968: jis0208<<14 | 0x2C<<7 | 0x3E, + 27445 - 19968: jis0212<<14 | 0x24<<7 | 0x4C, + 27446 - 19968: jis0212<<14 | 0x24<<7 | 0x4D, + 27447 - 19968: jis0208<<14 | 0x3C<<7 | 0x17, + 27448 - 19968: jis0208<<14 | 0x3C<<7 | 0x16, + 27449 - 19968: jis0208<<14 | 0x3C<<7 | 0x19, + 27450 - 19968: jis0208<<14 | 0x14<<7 | 0x1C, + 27451 - 19968: jis0212<<14 | 0x24<<7 | 0x4E, + 27453 - 19968: jis0208<<14 | 0x15<<7 | 0x35, + 27454 - 19968: jis0208<<14 | 0x13<<7 | 0x1D, + 27455 - 19968: jis0212<<14 | 0x24<<7 | 0x4F, + 27459 - 19968: jis0208<<14 | 0x3C<<7 | 0x1C, + 27462 - 19968: jis0212<<14 | 0x24<<7 | 0x50, + 27463 - 19968: jis0208<<14 | 0x3C<<7 | 0x1B, + 27465 - 19968: jis0208<<14 | 0x3C<<7 | 0x1D, + 27466 - 19968: jis0212<<14 | 0x24<<7 | 0x51, + 27468 - 19968: jis0208<<14 | 0x11<<7 | 0x2D, + 27469 - 19968: jis0212<<14 | 0x24<<7 | 0x52, + 27470 - 19968: jis0208<<14 | 0x22<<7 | 0x16, + 27472 - 19968: jis0208<<14 | 0x3C<<7 | 0x1E, + 27474 - 19968: jis0212<<14 | 0x24<<7 | 0x53, + 27475 - 19968: jis0208<<14 | 0x13<<7 | 0x1E, + 27476 - 19968: jis0208<<14 | 0x3C<<7 | 0x20, + 27478 - 19968: jis0212<<14 | 0x24<<7 | 0x54, + 27480 - 19968: jis0212<<14 | 0x24<<7 | 0x55, + 27481 - 19968: jis0208<<14 | 0x3C<<7 | 0x1F, + 27483 - 19968: jis0208<<14 | 0x3C<<7 | 0x21, + 27485 - 19968: jis0212<<14 | 0x24<<7 | 0x56, + 27487 - 19968: jis0208<<14 | 0x3C<<7 | 0x22, + 27488 - 19968: jis0212<<14 | 0x24<<7 | 0x57, + 27489 - 19968: jis0208<<14 | 0x3C<<7 | 0x23, + 27490 - 19968: jis0208<<14 | 0x1A<<7 | 0x3E, + 27491 - 19968: jis0208<<14 | 0x1F<<7 | 0x14, + 27492 - 19968: jis0208<<14 | 0x19<<7 | 0x00, + 27494 - 19968: jis0208<<14 | 0x28<<7 | 0x4F, + 27495 - 19968: jis0212<<14 | 0x24<<7 | 0x58, + 27497 - 19968: jis0208<<14 | 0x29<<7 | 0x41, + 27498 - 19968: jis0208<<14 | 0x2E<<7 | 0x23, + 27499 - 19968: jis0212<<14 | 0x24<<7 | 0x59, + 27502 - 19968: jis0212<<14 | 0x24<<7 | 0x5A, + 27503 - 19968: jis0208<<14 | 0x1A<<7 | 0x54, + 27504 - 19968: jis0212<<14 | 0x24<<7 | 0x5B, + 27507 - 19968: jis0208<<14 | 0x19<<7 | 0x2F, + 27508 - 19968: jis0208<<14 | 0x2D<<7 | 0x51, + 27509 - 19968: jis0212<<14 | 0x24<<7 | 0x5C, + 27512 - 19968: jis0208<<14 | 0x3C<<7 | 0x24, + 27513 - 19968: jis0208<<14 | 0x3C<<7 | 0x25, + 27515 - 19968: jis0208<<14 | 0x1A<<7 | 0x3F, + 27517 - 19968: jis0212<<14 | 0x24<<7 | 0x5D, + 27518 - 19968: jis0212<<14 | 0x25<<7 | 0x00, + 27519 - 19968: jis0208<<14 | 0x3C<<7 | 0x26, + 27520 - 19968: jis0208<<14 | 0x3C<<7 | 0x27, + 27522 - 19968: jis0212<<14 | 0x25<<7 | 0x01, + 27523 - 19968: jis0208<<14 | 0x3C<<7 | 0x29, + 27524 - 19968: jis0208<<14 | 0x3C<<7 | 0x28, + 27525 - 19968: jis0212<<14 | 0x25<<7 | 0x02, + 27526 - 19968: jis0208<<14 | 0x2A<<7 | 0x37, + 27529 - 19968: jis0208<<14 | 0x1C<<7 | 0x3D, + 27530 - 19968: jis0208<<14 | 0x1B<<7 | 0x4B, + 27531 - 19968: jis0208<<14 | 0x1A<<7 | 0x23, + 27533 - 19968: jis0208<<14 | 0x3C<<7 | 0x2A, + 27541 - 19968: jis0208<<14 | 0x3C<<7 | 0x2C, + 27542 - 19968: jis0208<<14 | 0x1E<<7 | 0x02, + 27543 - 19968: jis0212<<14 | 0x25<<7 | 0x03, + 27544 - 19968: jis0208<<14 | 0x3C<<7 | 0x2B, + 27547 - 19968: jis0212<<14 | 0x25<<7 | 0x04, + 27550 - 19968: jis0208<<14 | 0x3C<<7 | 0x2D, + 27551 - 19968: jis0212<<14 | 0x25<<7 | 0x05, + 27552 - 19968: jis0212<<14 | 0x25<<7 | 0x06, + 27554 - 19968: jis0212<<14 | 0x25<<7 | 0x07, + 27555 - 19968: jis0212<<14 | 0x25<<7 | 0x08, + 27556 - 19968: jis0208<<14 | 0x3C<<7 | 0x2E, + 27560 - 19968: jis0212<<14 | 0x25<<7 | 0x09, + 27561 - 19968: jis0212<<14 | 0x25<<7 | 0x0A, + 27562 - 19968: jis0208<<14 | 0x3C<<7 | 0x2F, + 27563 - 19968: jis0208<<14 | 0x3C<<7 | 0x30, + 27564 - 19968: jis0212<<14 | 0x25<<7 | 0x0B, + 27565 - 19968: jis0212<<14 | 0x25<<7 | 0x0C, + 27566 - 19968: jis0212<<14 | 0x25<<7 | 0x0D, + 27567 - 19968: jis0208<<14 | 0x3C<<7 | 0x31, + 27568 - 19968: jis0212<<14 | 0x25<<7 | 0x0E, + 27569 - 19968: jis0208<<14 | 0x3C<<7 | 0x33, + 27570 - 19968: jis0208<<14 | 0x3C<<7 | 0x32, + 27571 - 19968: jis0208<<14 | 0x3C<<7 | 0x34, + 27572 - 19968: jis0208<<14 | 0x11<<7 | 0x04, + 27573 - 19968: jis0208<<14 | 0x22<<7 | 0x29, + 27575 - 19968: jis0208<<14 | 0x3C<<7 | 0x35, + 27576 - 19968: jis0212<<14 | 0x25<<7 | 0x0F, + 27577 - 19968: jis0212<<14 | 0x25<<7 | 0x10, + 27578 - 19968: jis0208<<14 | 0x1A<<7 | 0x05, + 27579 - 19968: jis0208<<14 | 0x12<<7 | 0x2B, + 27580 - 19968: jis0208<<14 | 0x3C<<7 | 0x36, + 27581 - 19968: jis0212<<14 | 0x25<<7 | 0x11, + 27582 - 19968: jis0212<<14 | 0x25<<7 | 0x12, + 27583 - 19968: jis0208<<14 | 0x24<<7 | 0x21, + 27584 - 19968: jis0208<<14 | 0x33<<7 | 0x2B, + 27587 - 19968: jis0212<<14 | 0x25<<7 | 0x13, + 27588 - 19968: jis0212<<14 | 0x25<<7 | 0x14, + 27589 - 19968: jis0208<<14 | 0x14<<7 | 0x02, + 27590 - 19968: jis0208<<14 | 0x3C<<7 | 0x37, + 27593 - 19968: jis0212<<14 | 0x25<<7 | 0x15, + 27595 - 19968: jis0208<<14 | 0x3C<<7 | 0x38, + 27596 - 19968: jis0212<<14 | 0x25<<7 | 0x16, + 27597 - 19968: jis0208<<14 | 0x29<<7 | 0x4B, + 27598 - 19968: jis0208<<14 | 0x2A<<7 | 0x47, + 27602 - 19968: jis0208<<14 | 0x25<<7 | 0x26, + 27603 - 19968: jis0208<<14 | 0x3C<<7 | 0x39, + 27604 - 19968: jis0208<<14 | 0x27<<7 | 0x45, + 27606 - 19968: jis0208<<14 | 0x59<<7 | 0x39, + 27608 - 19968: jis0208<<14 | 0x27<<7 | 0x5A, + 27610 - 19968: jis0212<<14 | 0x25<<7 | 0x18, + 27611 - 19968: jis0208<<14 | 0x2B<<7 | 0x32, + 27615 - 19968: jis0208<<14 | 0x3C<<7 | 0x3A, + 27617 - 19968: jis0212<<14 | 0x25<<7 | 0x19, + 27619 - 19968: jis0212<<14 | 0x25<<7 | 0x1A, + 27622 - 19968: jis0212<<14 | 0x25<<7 | 0x1B, + 27623 - 19968: jis0212<<14 | 0x25<<7 | 0x1C, + 27627 - 19968: jis0208<<14 | 0x3C<<7 | 0x3C, + 27628 - 19968: jis0208<<14 | 0x3C<<7 | 0x3B, + 27630 - 19968: jis0212<<14 | 0x25<<7 | 0x1D, + 27631 - 19968: jis0208<<14 | 0x3C<<7 | 0x3E, + 27633 - 19968: jis0212<<14 | 0x25<<7 | 0x1E, + 27635 - 19968: jis0208<<14 | 0x3C<<7 | 0x3D, + 27639 - 19968: jis0212<<14 | 0x25<<7 | 0x1F, + 27641 - 19968: jis0212<<14 | 0x25<<7 | 0x20, + 27647 - 19968: jis0212<<14 | 0x25<<7 | 0x21, + 27650 - 19968: jis0212<<14 | 0x25<<7 | 0x22, + 27652 - 19968: jis0212<<14 | 0x25<<7 | 0x23, + 27653 - 19968: jis0212<<14 | 0x25<<7 | 0x24, + 27656 - 19968: jis0208<<14 | 0x3C<<7 | 0x40, + 27657 - 19968: jis0212<<14 | 0x25<<7 | 0x25, + 27661 - 19968: jis0212<<14 | 0x25<<7 | 0x26, + 27662 - 19968: jis0212<<14 | 0x25<<7 | 0x27, + 27663 - 19968: jis0208<<14 | 0x1A<<7 | 0x40, + 27664 - 19968: jis0212<<14 | 0x25<<7 | 0x28, + 27665 - 19968: jis0208<<14 | 0x2B<<7 | 0x10, + 27666 - 19968: jis0212<<14 | 0x25<<7 | 0x29, + 27667 - 19968: jis0208<<14 | 0x3C<<7 | 0x41, + 27668 - 19968: jis0208<<14 | 0x3C<<7 | 0x42, + 27671 - 19968: jis0208<<14 | 0x14<<7 | 0x03, + 27673 - 19968: jis0212<<14 | 0x25<<7 | 0x2A, + 27675 - 19968: jis0208<<14 | 0x3C<<7 | 0x43, + 27679 - 19968: jis0212<<14 | 0x25<<7 | 0x2B, + 27683 - 19968: jis0208<<14 | 0x3C<<7 | 0x45, + 27684 - 19968: jis0208<<14 | 0x3C<<7 | 0x44, + 27686 - 19968: jis0212<<14 | 0x25<<7 | 0x2C, + 27687 - 19968: jis0212<<14 | 0x25<<7 | 0x2D, + 27688 - 19968: jis0212<<14 | 0x25<<7 | 0x2E, + 27692 - 19968: jis0212<<14 | 0x25<<7 | 0x2F, + 27694 - 19968: jis0212<<14 | 0x25<<7 | 0x30, + 27699 - 19968: jis0212<<14 | 0x25<<7 | 0x31, + 27700 - 19968: jis0208<<14 | 0x1E<<7 | 0x44, + 27701 - 19968: jis0212<<14 | 0x25<<7 | 0x32, + 27702 - 19968: jis0212<<14 | 0x25<<7 | 0x33, + 27703 - 19968: jis0208<<14 | 0x28<<7 | 0x18, + 27704 - 19968: jis0208<<14 | 0x10<<7 | 0x29, + 27706 - 19968: jis0212<<14 | 0x25<<7 | 0x34, + 27707 - 19968: jis0212<<14 | 0x25<<7 | 0x35, + 27710 - 19968: jis0208<<14 | 0x27<<7 | 0x24, + 27711 - 19968: jis0208<<14 | 0x59<<7 | 0x3A, + 27712 - 19968: jis0208<<14 | 0x23<<7 | 0x54, + 27713 - 19968: jis0208<<14 | 0x1C<<7 | 0x20, + 27714 - 19968: jis0208<<14 | 0x14<<7 | 0x40, + 27722 - 19968: jis0212<<14 | 0x25<<7 | 0x37, + 27723 - 19968: jis0212<<14 | 0x25<<7 | 0x38, + 27725 - 19968: jis0212<<14 | 0x25<<7 | 0x39, + 27726 - 19968: jis0208<<14 | 0x27<<7 | 0x25, + 27727 - 19968: jis0212<<14 | 0x25<<7 | 0x3A, + 27728 - 19968: jis0208<<14 | 0x1B<<7 | 0x0D, + 27730 - 19968: jis0212<<14 | 0x25<<7 | 0x3B, + 27732 - 19968: jis0212<<14 | 0x25<<7 | 0x3C, + 27733 - 19968: jis0208<<14 | 0x3C<<7 | 0x47, + 27735 - 19968: jis0208<<14 | 0x13<<7 | 0x1F, + 27737 - 19968: jis0212<<14 | 0x25<<7 | 0x3D, + 27738 - 19968: jis0208<<14 | 0x10<<7 | 0x57, + 27739 - 19968: jis0212<<14 | 0x25<<7 | 0x3E, + 27740 - 19968: jis0208<<14 | 0x59<<7 | 0x3B, + 27741 - 19968: jis0208<<14 | 0x25<<7 | 0x51, + 27742 - 19968: jis0208<<14 | 0x3C<<7 | 0x46, + 27743 - 19968: jis0208<<14 | 0x18<<7 | 0x1D, + 27744 - 19968: jis0208<<14 | 0x22<<7 | 0x32, + 27746 - 19968: jis0208<<14 | 0x3C<<7 | 0x48, + 27751 - 19968: jis0212<<14 | 0x26<<7 | 0x15, + 27752 - 19968: jis0208<<14 | 0x3C<<7 | 0x50, + 27754 - 19968: jis0208<<14 | 0x3C<<7 | 0x49, + 27755 - 19968: jis0212<<14 | 0x25<<7 | 0x40, + 27757 - 19968: jis0212<<14 | 0x25<<7 | 0x41, + 27759 - 19968: jis0208<<14 | 0x59<<7 | 0x3D, + 27760 - 19968: jis0208<<14 | 0x21<<7 | 0x20, + 27762 - 19968: jis0208<<14 | 0x14<<7 | 0x41, + 27763 - 19968: jis0208<<14 | 0x3C<<7 | 0x51, + 27764 - 19968: jis0212<<14 | 0x25<<7 | 0x43, + 27766 - 19968: jis0212<<14 | 0x25<<7 | 0x44, + 27768 - 19968: jis0212<<14 | 0x25<<7 | 0x45, + 27769 - 19968: jis0212<<14 | 0x25<<7 | 0x46, + 27770 - 19968: jis0208<<14 | 0x16<<7 | 0x47, + 27771 - 19968: jis0212<<14 | 0x25<<7 | 0x47, + 27773 - 19968: jis0208<<14 | 0x14<<7 | 0x04, + 27774 - 19968: jis0208<<14 | 0x3C<<7 | 0x4F, + 27777 - 19968: jis0208<<14 | 0x3C<<7 | 0x4D, + 27778 - 19968: jis0208<<14 | 0x3C<<7 | 0x4A, + 27779 - 19968: jis0208<<14 | 0x2C<<7 | 0x3F, + 27781 - 19968: jis0212<<14 | 0x25<<7 | 0x48, + 27782 - 19968: jis0208<<14 | 0x59<<7 | 0x3C, + 27783 - 19968: jis0212<<14 | 0x25<<7 | 0x4A, + 27784 - 19968: jis0208<<14 | 0x23<<7 | 0x1F, + 27785 - 19968: jis0212<<14 | 0x25<<7 | 0x4B, + 27788 - 19968: jis0208<<14 | 0x25<<7 | 0x38, + 27789 - 19968: jis0208<<14 | 0x3C<<7 | 0x4B, + 27792 - 19968: jis0208<<14 | 0x3C<<7 | 0x53, + 27794 - 19968: jis0208<<14 | 0x3C<<7 | 0x52, + 27795 - 19968: jis0208<<14 | 0x16<<7 | 0x02, + 27796 - 19968: jis0212<<14 | 0x25<<7 | 0x4C, + 27797 - 19968: jis0212<<14 | 0x25<<7 | 0x4D, + 27798 - 19968: jis0208<<14 | 0x11<<7 | 0x0C, + 27799 - 19968: jis0212<<14 | 0x25<<7 | 0x4E, + 27800 - 19968: jis0212<<14 | 0x25<<7 | 0x4F, + 27801 - 19968: jis0208<<14 | 0x19<<7 | 0x1A, + 27802 - 19968: jis0208<<14 | 0x3C<<7 | 0x4C, + 27803 - 19968: jis0208<<14 | 0x3C<<7 | 0x4E, + 27804 - 19968: jis0212<<14 | 0x25<<7 | 0x50, + 27807 - 19968: jis0212<<14 | 0x25<<7 | 0x51, + 27809 - 19968: jis0208<<14 | 0x2A<<7 | 0x36, + 27810 - 19968: jis0208<<14 | 0x21<<7 | 0x53, + 27819 - 19968: jis0208<<14 | 0x2A<<7 | 0x56, + 27822 - 19968: jis0208<<14 | 0x3C<<7 | 0x5B, + 27824 - 19968: jis0212<<14 | 0x25<<7 | 0x52, + 27825 - 19968: jis0208<<14 | 0x3C<<7 | 0x5C, + 27826 - 19968: jis0212<<14 | 0x25<<7 | 0x53, + 27827 - 19968: jis0208<<14 | 0x11<<7 | 0x2E, + 27828 - 19968: jis0212<<14 | 0x25<<7 | 0x54, + 27832 - 19968: jis0208<<14 | 0x29<<7 | 0x07, + 27833 - 19968: jis0208<<14 | 0x2B<<7 | 0x5C, + 27834 - 19968: jis0208<<14 | 0x3D<<7 | 0x00, + 27835 - 19968: jis0208<<14 | 0x1B<<7 | 0x02, + 27836 - 19968: jis0208<<14 | 0x1D<<7 | 0x21, + 27837 - 19968: jis0208<<14 | 0x3C<<7 | 0x57, + 27838 - 19968: jis0208<<14 | 0x3C<<7 | 0x5D, + 27839 - 19968: jis0208<<14 | 0x10<<7 | 0x47, + 27841 - 19968: jis0208<<14 | 0x15<<7 | 0x16, + 27842 - 19968: jis0212<<14 | 0x25<<7 | 0x55, + 27844 - 19968: jis0208<<14 | 0x3C<<7 | 0x54, + 27845 - 19968: jis0208<<14 | 0x3C<<7 | 0x59, + 27846 - 19968: jis0212<<14 | 0x25<<7 | 0x56, + 27849 - 19968: jis0208<<14 | 0x1F<<7 | 0x53, + 27850 - 19968: jis0208<<14 | 0x26<<7 | 0x50, + 27852 - 19968: jis0208<<14 | 0x27<<7 | 0x46, + 27853 - 19968: jis0212<<14 | 0x25<<7 | 0x57, + 27855 - 19968: jis0212<<14 | 0x25<<7 | 0x58, + 27856 - 19968: jis0212<<14 | 0x25<<7 | 0x59, + 27857 - 19968: jis0212<<14 | 0x25<<7 | 0x5A, + 27858 - 19968: jis0212<<14 | 0x25<<7 | 0x5B, + 27859 - 19968: jis0208<<14 | 0x3C<<7 | 0x56, + 27860 - 19968: jis0212<<14 | 0x25<<7 | 0x5C, + 27861 - 19968: jis0208<<14 | 0x2A<<7 | 0x00, + 27862 - 19968: jis0212<<14 | 0x25<<7 | 0x5D, + 27863 - 19968: jis0208<<14 | 0x3C<<7 | 0x58, + 27865 - 19968: jis0208<<14 | 0x3D<<7 | 0x03, + 27866 - 19968: jis0208<<14 | 0x59<<7 | 0x3E, + 27867 - 19968: jis0208<<14 | 0x3D<<7 | 0x01, + 27868 - 19968: jis0212<<14 | 0x26<<7 | 0x01, + 27869 - 19968: jis0208<<14 | 0x3C<<7 | 0x5A, + 27872 - 19968: jis0212<<14 | 0x26<<7 | 0x02, + 27873 - 19968: jis0208<<14 | 0x2A<<7 | 0x01, + 27874 - 19968: jis0208<<14 | 0x26<<7 | 0x27, + 27875 - 19968: jis0208<<14 | 0x14<<7 | 0x42, + 27877 - 19968: jis0208<<14 | 0x24<<7 | 0x04, + 27879 - 19968: jis0212<<14 | 0x26<<7 | 0x03, + 27880 - 19968: jis0208<<14 | 0x22<<7 | 0x4C, + 27881 - 19968: jis0212<<14 | 0x26<<7 | 0x04, + 27882 - 19968: jis0208<<14 | 0x3D<<7 | 0x04, + 27883 - 19968: jis0212<<14 | 0x26<<7 | 0x05, + 27884 - 19968: jis0212<<14 | 0x26<<7 | 0x06, + 27886 - 19968: jis0212<<14 | 0x26<<7 | 0x07, + 27887 - 19968: jis0208<<14 | 0x3D<<7 | 0x02, + 27888 - 19968: jis0208<<14 | 0x21<<7 | 0x38, + 27889 - 19968: jis0208<<14 | 0x3C<<7 | 0x55, + 27890 - 19968: jis0212<<14 | 0x26<<7 | 0x08, + 27891 - 19968: jis0208<<14 | 0x10<<7 | 0x2A, + 27892 - 19968: jis0212<<14 | 0x26<<7 | 0x09, + 27908 - 19968: jis0208<<14 | 0x59<<7 | 0x3F, + 27911 - 19968: jis0212<<14 | 0x26<<7 | 0x0B, + 27914 - 19968: jis0212<<14 | 0x26<<7 | 0x0C, + 27915 - 19968: jis0208<<14 | 0x2C<<7 | 0x2D, + 27916 - 19968: jis0208<<14 | 0x3D<<7 | 0x0F, + 27918 - 19968: jis0212<<14 | 0x26<<7 | 0x0D, + 27919 - 19968: jis0212<<14 | 0x26<<7 | 0x0E, + 27921 - 19968: jis0212<<14 | 0x26<<7 | 0x0F, + 27922 - 19968: jis0208<<14 | 0x3D<<7 | 0x0E, + 27923 - 19968: jis0212<<14 | 0x26<<7 | 0x10, + 27927 - 19968: jis0208<<14 | 0x1F<<7 | 0x55, + 27929 - 19968: jis0208<<14 | 0x3D<<7 | 0x0B, + 27930 - 19968: jis0212<<14 | 0x26<<7 | 0x11, + 27931 - 19968: jis0208<<14 | 0x2C<<7 | 0x4B, + 27934 - 19968: jis0208<<14 | 0x25<<7 | 0x15, + 27935 - 19968: jis0208<<14 | 0x3D<<7 | 0x05, + 27941 - 19968: jis0208<<14 | 0x23<<7 | 0x24, + 27942 - 19968: jis0212<<14 | 0x26<<7 | 0x12, + 27943 - 19968: jis0212<<14 | 0x26<<7 | 0x13, + 27944 - 19968: jis0212<<14 | 0x26<<7 | 0x14, + 27945 - 19968: jis0208<<14 | 0x10<<7 | 0x2B, + 27946 - 19968: jis0208<<14 | 0x18<<7 | 0x1E, + 27947 - 19968: jis0208<<14 | 0x3D<<7 | 0x08, + 27950 - 19968: jis0212<<14 | 0x26<<7 | 0x16, + 27951 - 19968: jis0212<<14 | 0x26<<7 | 0x17, + 27953 - 19968: jis0212<<14 | 0x26<<7 | 0x18, + 27954 - 19968: jis0208<<14 | 0x1C<<7 | 0x06, + 27955 - 19968: jis0208<<14 | 0x3D<<7 | 0x0D, + 27957 - 19968: jis0208<<14 | 0x3D<<7 | 0x0C, + 27958 - 19968: jis0208<<14 | 0x3D<<7 | 0x07, + 27960 - 19968: jis0208<<14 | 0x3D<<7 | 0x0A, + 27961 - 19968: jis0212<<14 | 0x26<<7 | 0x19, + 27963 - 19968: jis0208<<14 | 0x12<<7 | 0x47, + 27964 - 19968: jis0212<<14 | 0x26<<7 | 0x1A, + 27965 - 19968: jis0208<<14 | 0x3D<<7 | 0x09, + 27966 - 19968: jis0208<<14 | 0x26<<7 | 0x28, + 27967 - 19968: jis0212<<14 | 0x26<<7 | 0x1B, + 27969 - 19968: jis0208<<14 | 0x2D<<7 | 0x0D, + 27972 - 19968: jis0208<<14 | 0x1D<<7 | 0x53, + 27973 - 19968: jis0208<<14 | 0x1F<<7 | 0x54, + 27991 - 19968: jis0212<<14 | 0x26<<7 | 0x1C, + 27993 - 19968: jis0208<<14 | 0x3D<<7 | 0x15, + 27994 - 19968: jis0208<<14 | 0x3D<<7 | 0x13, + 27996 - 19968: jis0208<<14 | 0x28<<7 | 0x2C, + 27998 - 19968: jis0212<<14 | 0x26<<7 | 0x1D, + 27999 - 19968: jis0212<<14 | 0x26<<7 | 0x1E, + 28001 - 19968: jis0212<<14 | 0x26<<7 | 0x1F, + 28003 - 19968: jis0208<<14 | 0x3D<<7 | 0x10, + 28004 - 19968: jis0208<<14 | 0x3D<<7 | 0x12, + 28005 - 19968: jis0212<<14 | 0x26<<7 | 0x20, + 28006 - 19968: jis0208<<14 | 0x10<<7 | 0x19, + 28007 - 19968: jis0212<<14 | 0x26<<7 | 0x21, + 28009 - 19968: jis0208<<14 | 0x18<<7 | 0x1F, + 28010 - 19968: jis0208<<14 | 0x2E<<7 | 0x11, + 28012 - 19968: jis0208<<14 | 0x12<<7 | 0x1C, + 28014 - 19968: jis0208<<14 | 0x28<<7 | 0x41, + 28015 - 19968: jis0208<<14 | 0x59<<7 | 0x41, + 28016 - 19968: jis0212<<14 | 0x26<<7 | 0x23, + 28020 - 19968: jis0208<<14 | 0x2C<<7 | 0x40, + 28023 - 19968: jis0208<<14 | 0x12<<7 | 0x03, + 28024 - 19968: jis0208<<14 | 0x1E<<7 | 0x1A, + 28025 - 19968: jis0208<<14 | 0x3D<<7 | 0x14, + 28028 - 19968: jis0212<<14 | 0x26<<7 | 0x24, + 28034 - 19968: jis0212<<14 | 0x26<<7 | 0x25, + 28037 - 19968: jis0208<<14 | 0x3D<<7 | 0x19, + 28039 - 19968: jis0208<<14 | 0x59<<7 | 0x40, + 28040 - 19968: jis0208<<14 | 0x1D<<7 | 0x22, + 28044 - 19968: jis0208<<14 | 0x2C<<7 | 0x0F, + 28046 - 19968: jis0208<<14 | 0x3D<<7 | 0x16, + 28049 - 19968: jis0212<<14 | 0x26<<7 | 0x27, + 28050 - 19968: jis0212<<14 | 0x26<<7 | 0x28, + 28051 - 19968: jis0208<<14 | 0x3D<<7 | 0x11, + 28052 - 19968: jis0212<<14 | 0x26<<7 | 0x29, + 28053 - 19968: jis0208<<14 | 0x3D<<7 | 0x17, + 28054 - 19968: jis0208<<14 | 0x59<<7 | 0x42, + 28055 - 19968: jis0212<<14 | 0x26<<7 | 0x2B, + 28056 - 19968: jis0212<<14 | 0x26<<7 | 0x2C, + 28057 - 19968: jis0208<<14 | 0x2D<<7 | 0x3D, + 28059 - 19968: jis0208<<14 | 0x24<<7 | 0x52, + 28060 - 19968: jis0208<<14 | 0x25<<7 | 0x21, + 28074 - 19968: jis0212<<14 | 0x26<<7 | 0x2D, + 28076 - 19968: jis0208<<14 | 0x59<<7 | 0x43, + 28079 - 19968: jis0208<<14 | 0x12<<7 | 0x15, + 28082 - 19968: jis0208<<14 | 0x10<<7 | 0x34, + 28084 - 19968: jis0212<<14 | 0x26<<7 | 0x2F, + 28085 - 19968: jis0208<<14 | 0x3D<<7 | 0x1D, + 28087 - 19968: jis0212<<14 | 0x26<<7 | 0x30, + 28088 - 19968: jis0208<<14 | 0x3D<<7 | 0x20, + 28089 - 19968: jis0212<<14 | 0x26<<7 | 0x31, + 28092 - 19968: jis0208<<14 | 0x2D<<7 | 0x22, + 28093 - 19968: jis0212<<14 | 0x26<<7 | 0x32, + 28095 - 19968: jis0212<<14 | 0x26<<7 | 0x33, + 28096 - 19968: jis0208<<14 | 0x2C<<7 | 0x43, + 28100 - 19968: jis0212<<14 | 0x26<<7 | 0x34, + 28101 - 19968: jis0208<<14 | 0x3D<<7 | 0x27, + 28102 - 19968: jis0208<<14 | 0x3D<<7 | 0x21, + 28103 - 19968: jis0208<<14 | 0x3D<<7 | 0x1E, + 28104 - 19968: jis0212<<14 | 0x26<<7 | 0x35, + 28106 - 19968: jis0212<<14 | 0x26<<7 | 0x36, + 28107 - 19968: jis0208<<14 | 0x2D<<7 | 0x33, + 28108 - 19968: jis0208<<14 | 0x3D<<7 | 0x24, + 28110 - 19968: jis0212<<14 | 0x26<<7 | 0x37, + 28111 - 19968: jis0208<<14 | 0x59<<7 | 0x44, + 28113 - 19968: jis0208<<14 | 0x1C<<7 | 0x29, + 28114 - 19968: jis0208<<14 | 0x3D<<7 | 0x26, + 28117 - 19968: jis0208<<14 | 0x3D<<7 | 0x2B, + 28118 - 19968: jis0212<<14 | 0x26<<7 | 0x39, + 28120 - 19968: jis0208<<14 | 0x24<<7 | 0x50, + 28121 - 19968: jis0208<<14 | 0x3D<<7 | 0x29, + 28123 - 19968: jis0212<<14 | 0x26<<7 | 0x3A, + 28125 - 19968: jis0212<<14 | 0x26<<7 | 0x3B, + 28126 - 19968: jis0208<<14 | 0x3D<<7 | 0x23, + 28127 - 19968: jis0212<<14 | 0x26<<7 | 0x3C, + 28128 - 19968: jis0212<<14 | 0x26<<7 | 0x3D, + 28129 - 19968: jis0208<<14 | 0x22<<7 | 0x17, + 28130 - 19968: jis0212<<14 | 0x26<<7 | 0x3E, + 28132 - 19968: jis0208<<14 | 0x3D<<7 | 0x2A, + 28133 - 19968: jis0212<<14 | 0x26<<7 | 0x3F, + 28134 - 19968: jis0208<<14 | 0x3D<<7 | 0x1F, + 28136 - 19968: jis0208<<14 | 0x3D<<7 | 0x25, + 28137 - 19968: jis0212<<14 | 0x26<<7 | 0x40, + 28138 - 19968: jis0208<<14 | 0x3D<<7 | 0x2C, + 28139 - 19968: jis0208<<14 | 0x0F<<7 | 0x5B, + 28140 - 19968: jis0208<<14 | 0x3D<<7 | 0x22, + 28142 - 19968: jis0208<<14 | 0x3D<<7 | 0x2D, + 28143 - 19968: jis0212<<14 | 0x26<<7 | 0x41, + 28144 - 19968: jis0212<<14 | 0x26<<7 | 0x42, + 28145 - 19968: jis0208<<14 | 0x1E<<7 | 0x1B, + 28146 - 19968: jis0208<<14 | 0x59<<7 | 0x46, + 28147 - 19968: jis0208<<14 | 0x1C<<7 | 0x3E, + 28148 - 19968: jis0212<<14 | 0x26<<7 | 0x43, + 28149 - 19968: jis0208<<14 | 0x29<<7 | 0x04, + 28150 - 19968: jis0212<<14 | 0x26<<7 | 0x44, + 28151 - 19968: jis0208<<14 | 0x19<<7 | 0x0D, + 28152 - 19968: jis0208<<14 | 0x59<<7 | 0x45, + 28153 - 19968: jis0208<<14 | 0x3D<<7 | 0x1A, + 28154 - 19968: jis0208<<14 | 0x3D<<7 | 0x28, + 28155 - 19968: jis0208<<14 | 0x24<<7 | 0x19, + 28156 - 19968: jis0208<<14 | 0x59<<7 | 0x47, + 28160 - 19968: jis0212<<14 | 0x26<<7 | 0x46, + 28164 - 19968: jis0212<<14 | 0x26<<7 | 0x47, + 28165 - 19968: jis0208<<14 | 0x1F<<7 | 0x15, + 28167 - 19968: jis0208<<14 | 0x12<<7 | 0x48, + 28168 - 19968: jis0208<<14 | 0x19<<7 | 0x30, + 28169 - 19968: jis0208<<14 | 0x1D<<7 | 0x23, + 28170 - 19968: jis0208<<14 | 0x3D<<7 | 0x1C, + 28171 - 19968: jis0208<<14 | 0x1C<<7 | 0x21, + 28179 - 19968: jis0208<<14 | 0x16<<7 | 0x2B, + 28181 - 19968: jis0208<<14 | 0x3D<<7 | 0x1B, + 28185 - 19968: jis0208<<14 | 0x3D<<7 | 0x31, + 28186 - 19968: jis0208<<14 | 0x1C<<7 | 0x4C, + 28187 - 19968: jis0208<<14 | 0x17<<7 | 0x19, + 28189 - 19968: jis0208<<14 | 0x3D<<7 | 0x40, + 28190 - 19968: jis0212<<14 | 0x26<<7 | 0x48, + 28191 - 19968: jis0208<<14 | 0x3D<<7 | 0x3A, + 28192 - 19968: jis0208<<14 | 0x14<<7 | 0x53, + 28193 - 19968: jis0208<<14 | 0x24<<7 | 0x2E, + 28194 - 19968: jis0212<<14 | 0x26<<7 | 0x49, + 28195 - 19968: jis0208<<14 | 0x3D<<7 | 0x35, + 28196 - 19968: jis0208<<14 | 0x3D<<7 | 0x3E, + 28197 - 19968: jis0208<<14 | 0x0F<<7 | 0x0E, + 28198 - 19968: jis0208<<14 | 0x10<<7 | 0x11, + 28199 - 19968: jis0208<<14 | 0x59<<7 | 0x4A, + 28201 - 19968: jis0208<<14 | 0x11<<7 | 0x18, + 28203 - 19968: jis0208<<14 | 0x3D<<7 | 0x37, + 28204 - 19968: jis0208<<14 | 0x21<<7 | 0x0B, + 28205 - 19968: jis0208<<14 | 0x3D<<7 | 0x2E, + 28206 - 19968: jis0208<<14 | 0x3D<<7 | 0x30, + 28207 - 19968: jis0208<<14 | 0x18<<7 | 0x20, + 28210 - 19968: jis0212<<14 | 0x26<<7 | 0x4B, + 28214 - 19968: jis0212<<14 | 0x26<<7 | 0x4C, + 28216 - 19968: jis0208<<14 | 0x3D<<7 | 0x41, + 28217 - 19968: jis0208<<14 | 0x59<<7 | 0x48, + 28218 - 19968: jis0208<<14 | 0x3D<<7 | 0x3C, + 28219 - 19968: jis0212<<14 | 0x26<<7 | 0x4E, + 28220 - 19968: jis0208<<14 | 0x59<<7 | 0x4B, + 28222 - 19968: jis0208<<14 | 0x3D<<7 | 0x34, + 28227 - 19968: jis0208<<14 | 0x3D<<7 | 0x3B, + 28228 - 19968: jis0212<<14 | 0x26<<7 | 0x50, + 28229 - 19968: jis0212<<14 | 0x26<<7 | 0x51, + 28232 - 19968: jis0212<<14 | 0x26<<7 | 0x52, + 28233 - 19968: jis0212<<14 | 0x26<<7 | 0x53, + 28234 - 19968: jis0208<<14 | 0x2B<<7 | 0x0A, + 28235 - 19968: jis0212<<14 | 0x26<<7 | 0x54, + 28237 - 19968: jis0208<<14 | 0x3D<<7 | 0x39, + 28238 - 19968: jis0208<<14 | 0x3D<<7 | 0x3D, + 28239 - 19968: jis0212<<14 | 0x26<<7 | 0x55, + 28241 - 19968: jis0212<<14 | 0x26<<7 | 0x56, + 28242 - 19968: jis0212<<14 | 0x26<<7 | 0x57, + 28243 - 19968: jis0212<<14 | 0x26<<7 | 0x58, + 28244 - 19968: jis0212<<14 | 0x26<<7 | 0x59, + 28246 - 19968: jis0208<<14 | 0x17<<7 | 0x2F, + 28247 - 19968: jis0212<<14 | 0x26<<7 | 0x5A, + 28248 - 19968: jis0208<<14 | 0x1D<<7 | 0x24, + 28251 - 19968: jis0208<<14 | 0x22<<7 | 0x18, + 28252 - 19968: jis0208<<14 | 0x59<<7 | 0x49, + 28253 - 19968: jis0212<<14 | 0x26<<7 | 0x5C, + 28254 - 19968: jis0212<<14 | 0x26<<7 | 0x5D, + 28255 - 19968: jis0208<<14 | 0x3D<<7 | 0x33, + 28258 - 19968: jis0212<<14 | 0x27<<7 | 0x00, + 28259 - 19968: jis0212<<14 | 0x27<<7 | 0x01, + 28263 - 19968: jis0208<<14 | 0x2C<<7 | 0x0E, + 28264 - 19968: jis0212<<14 | 0x27<<7 | 0x02, + 28267 - 19968: jis0208<<14 | 0x3D<<7 | 0x36, + 28270 - 19968: jis0208<<14 | 0x3D<<7 | 0x2F, + 28271 - 19968: jis0208<<14 | 0x24<<7 | 0x51, + 28274 - 19968: jis0208<<14 | 0x3D<<7 | 0x32, + 28275 - 19968: jis0212<<14 | 0x27<<7 | 0x03, + 28278 - 19968: jis0208<<14 | 0x3D<<7 | 0x38, + 28283 - 19968: jis0212<<14 | 0x27<<7 | 0x04, + 28285 - 19968: jis0212<<14 | 0x27<<7 | 0x05, + 28286 - 19968: jis0208<<14 | 0x2E<<7 | 0x30, + 28287 - 19968: jis0208<<14 | 0x1B<<7 | 0x1D, + 28288 - 19968: jis0208<<14 | 0x2A<<7 | 0x5D, + 28290 - 19968: jis0208<<14 | 0x3D<<7 | 0x42, + 28300 - 19968: jis0208<<14 | 0x27<<7 | 0x0D, + 28301 - 19968: jis0212<<14 | 0x27<<7 | 0x06, + 28303 - 19968: jis0208<<14 | 0x3D<<7 | 0x4E, + 28304 - 19968: jis0208<<14 | 0x17<<7 | 0x1A, + 28307 - 19968: jis0212<<14 | 0x27<<7 | 0x07, + 28310 - 19968: jis0208<<14 | 0x1C<<7 | 0x3F, + 28312 - 19968: jis0208<<14 | 0x3D<<7 | 0x44, + 28313 - 19968: jis0212<<14 | 0x27<<7 | 0x08, + 28316 - 19968: jis0208<<14 | 0x2D<<7 | 0x0E, + 28317 - 19968: jis0208<<14 | 0x18<<7 | 0x21, + 28319 - 19968: jis0208<<14 | 0x3D<<7 | 0x51, + 28320 - 19968: jis0212<<14 | 0x27<<7 | 0x09, + 28322 - 19968: jis0208<<14 | 0x0F<<7 | 0x4D, + 28325 - 19968: jis0208<<14 | 0x3D<<7 | 0x4F, + 28327 - 19968: jis0212<<14 | 0x27<<7 | 0x0A, + 28330 - 19968: jis0208<<14 | 0x3D<<7 | 0x43, + 28333 - 19968: jis0212<<14 | 0x27<<7 | 0x0B, + 28334 - 19968: jis0212<<14 | 0x27<<7 | 0x0C, + 28335 - 19968: jis0208<<14 | 0x3D<<7 | 0x49, + 28337 - 19968: jis0212<<14 | 0x27<<7 | 0x0D, + 28338 - 19968: jis0208<<14 | 0x3D<<7 | 0x4B, + 28339 - 19968: jis0212<<14 | 0x27<<7 | 0x0E, + 28342 - 19968: jis0208<<14 | 0x2C<<7 | 0x2E, + 28343 - 19968: jis0208<<14 | 0x3D<<7 | 0x46, + 28346 - 19968: jis0208<<14 | 0x24<<7 | 0x0D, + 28347 - 19968: jis0212<<14 | 0x27<<7 | 0x0F, + 28349 - 19968: jis0208<<14 | 0x3D<<7 | 0x48, + 28351 - 19968: jis0208<<14 | 0x59<<7 | 0x4C, + 28352 - 19968: jis0212<<14 | 0x27<<7 | 0x11, + 28353 - 19968: jis0212<<14 | 0x27<<7 | 0x12, + 28354 - 19968: jis0208<<14 | 0x3D<<7 | 0x50, + 28355 - 19968: jis0212<<14 | 0x27<<7 | 0x13, + 28356 - 19968: jis0208<<14 | 0x3D<<7 | 0x4A, + 28357 - 19968: jis0208<<14 | 0x2B<<7 | 0x26, + 28359 - 19968: jis0212<<14 | 0x27<<7 | 0x14, + 28360 - 19968: jis0212<<14 | 0x27<<7 | 0x15, + 28361 - 19968: jis0208<<14 | 0x3D<<7 | 0x45, + 28362 - 19968: jis0212<<14 | 0x27<<7 | 0x16, + 28363 - 19968: jis0208<<14 | 0x1B<<7 | 0x01, + 28364 - 19968: jis0208<<14 | 0x3D<<7 | 0x5D, + 28365 - 19968: jis0212<<14 | 0x27<<7 | 0x17, + 28366 - 19968: jis0212<<14 | 0x27<<7 | 0x18, + 28367 - 19968: jis0212<<14 | 0x27<<7 | 0x19, + 28369 - 19968: jis0208<<14 | 0x12<<7 | 0x49, + 28371 - 19968: jis0208<<14 | 0x3D<<7 | 0x47, + 28372 - 19968: jis0208<<14 | 0x3D<<7 | 0x4C, + 28373 - 19968: jis0208<<14 | 0x3D<<7 | 0x4D, + 28381 - 19968: jis0208<<14 | 0x21<<7 | 0x4B, + 28382 - 19968: jis0208<<14 | 0x21<<7 | 0x39, + 28395 - 19968: jis0212<<14 | 0x27<<7 | 0x1A, + 28396 - 19968: jis0208<<14 | 0x3D<<7 | 0x55, + 28397 - 19968: jis0212<<14 | 0x27<<7 | 0x1B, + 28398 - 19968: jis0212<<14 | 0x27<<7 | 0x1C, + 28399 - 19968: jis0208<<14 | 0x3D<<7 | 0x5B, + 28402 - 19968: jis0208<<14 | 0x3D<<7 | 0x59, + 28404 - 19968: jis0208<<14 | 0x24<<7 | 0x08, + 28407 - 19968: jis0208<<14 | 0x3E<<7 | 0x02, + 28408 - 19968: jis0208<<14 | 0x3D<<7 | 0x56, + 28409 - 19968: jis0212<<14 | 0x27<<7 | 0x1D, + 28411 - 19968: jis0212<<14 | 0x27<<7 | 0x1E, + 28413 - 19968: jis0212<<14 | 0x27<<7 | 0x1F, + 28414 - 19968: jis0208<<14 | 0x3D<<7 | 0x57, + 28415 - 19968: jis0208<<14 | 0x3D<<7 | 0x3F, + 28417 - 19968: jis0208<<14 | 0x14<<7 | 0x58, + 28418 - 19968: jis0208<<14 | 0x28<<7 | 0x19, + 28420 - 19968: jis0212<<14 | 0x27<<7 | 0x20, + 28422 - 19968: jis0208<<14 | 0x1B<<7 | 0x1E, + 28424 - 19968: jis0212<<14 | 0x27<<7 | 0x21, + 28425 - 19968: jis0208<<14 | 0x18<<7 | 0x56, + 28426 - 19968: jis0212<<14 | 0x27<<7 | 0x22, + 28428 - 19968: jis0212<<14 | 0x27<<7 | 0x23, + 28429 - 19968: jis0212<<14 | 0x27<<7 | 0x24, + 28431 - 19968: jis0208<<14 | 0x2E<<7 | 0x12, + 28433 - 19968: jis0208<<14 | 0x3D<<7 | 0x53, + 28435 - 19968: jis0208<<14 | 0x3E<<7 | 0x01, + 28436 - 19968: jis0208<<14 | 0x10<<7 | 0x48, + 28437 - 19968: jis0208<<14 | 0x20<<7 | 0x45, + 28438 - 19968: jis0212<<14 | 0x27<<7 | 0x25, + 28440 - 19968: jis0212<<14 | 0x27<<7 | 0x26, + 28442 - 19968: jis0212<<14 | 0x27<<7 | 0x27, + 28443 - 19968: jis0212<<14 | 0x27<<7 | 0x28, + 28448 - 19968: jis0208<<14 | 0x26<<7 | 0x58, + 28450 - 19968: jis0208<<14 | 0x13<<7 | 0x20, + 28451 - 19968: jis0208<<14 | 0x2D<<7 | 0x59, + 28454 - 19968: jis0212<<14 | 0x27<<7 | 0x29, + 28457 - 19968: jis0212<<14 | 0x27<<7 | 0x2A, + 28458 - 19968: jis0212<<14 | 0x27<<7 | 0x2B, + 28459 - 19968: jis0208<<14 | 0x2B<<7 | 0x00, + 28460 - 19968: jis0208<<14 | 0x23<<7 | 0x31, + 28461 - 19968: jis0212<<14 | 0x27<<7 | 0x32, + 28463 - 19968: jis0212<<14 | 0x27<<7 | 0x2C, + 28464 - 19968: jis0212<<14 | 0x27<<7 | 0x2D, + 28465 - 19968: jis0208<<14 | 0x3D<<7 | 0x5A, + 28466 - 19968: jis0208<<14 | 0x3D<<7 | 0x5C, + 28467 - 19968: jis0212<<14 | 0x27<<7 | 0x2E, + 28470 - 19968: jis0212<<14 | 0x27<<7 | 0x2F, + 28472 - 19968: jis0208<<14 | 0x20<<7 | 0x11, + 28475 - 19968: jis0212<<14 | 0x27<<7 | 0x30, + 28476 - 19968: jis0212<<14 | 0x27<<7 | 0x31, + 28478 - 19968: jis0208<<14 | 0x3E<<7 | 0x00, + 28479 - 19968: jis0208<<14 | 0x3D<<7 | 0x58, + 28481 - 19968: jis0208<<14 | 0x3D<<7 | 0x52, + 28485 - 19968: jis0208<<14 | 0x13<<7 | 0x22, + 28495 - 19968: jis0212<<14 | 0x27<<7 | 0x33, + 28497 - 19968: jis0212<<14 | 0x27<<7 | 0x34, + 28498 - 19968: jis0212<<14 | 0x27<<7 | 0x35, + 28499 - 19968: jis0212<<14 | 0x27<<7 | 0x36, + 28500 - 19968: jis0208<<14 | 0x16<<7 | 0x48, + 28503 - 19968: jis0212<<14 | 0x27<<7 | 0x37, + 28504 - 19968: jis0208<<14 | 0x3E<<7 | 0x0E, + 28505 - 19968: jis0212<<14 | 0x27<<7 | 0x38, + 28506 - 19968: jis0212<<14 | 0x27<<7 | 0x39, + 28507 - 19968: jis0208<<14 | 0x3E<<7 | 0x09, + 28508 - 19968: jis0208<<14 | 0x1F<<7 | 0x57, + 28509 - 19968: jis0212<<14 | 0x27<<7 | 0x3A, + 28510 - 19968: jis0212<<14 | 0x27<<7 | 0x3B, + 28511 - 19968: jis0208<<14 | 0x12<<7 | 0x42, + 28513 - 19968: jis0212<<14 | 0x27<<7 | 0x3C, + 28514 - 19968: jis0212<<14 | 0x27<<7 | 0x3D, + 28516 - 19968: jis0208<<14 | 0x1C<<7 | 0x40, + 28518 - 19968: jis0208<<14 | 0x3E<<7 | 0x12, + 28520 - 19968: jis0212<<14 | 0x27<<7 | 0x3E, + 28524 - 19968: jis0212<<14 | 0x27<<7 | 0x3F, + 28525 - 19968: jis0208<<14 | 0x3E<<7 | 0x0B, + 28526 - 19968: jis0208<<14 | 0x23<<7 | 0x0B, + 28527 - 19968: jis0208<<14 | 0x3E<<7 | 0x08, + 28528 - 19968: jis0208<<14 | 0x23<<7 | 0x38, + 28532 - 19968: jis0208<<14 | 0x3E<<7 | 0x2B, + 28536 - 19968: jis0208<<14 | 0x3E<<7 | 0x05, + 28538 - 19968: jis0208<<14 | 0x3E<<7 | 0x04, + 28540 - 19968: jis0208<<14 | 0x3E<<7 | 0x0D, + 28541 - 19968: jis0212<<14 | 0x27<<7 | 0x40, + 28542 - 19968: jis0212<<14 | 0x27<<7 | 0x41, + 28544 - 19968: jis0208<<14 | 0x3E<<7 | 0x07, + 28545 - 19968: jis0208<<14 | 0x3E<<7 | 0x06, + 28546 - 19968: jis0208<<14 | 0x3E<<7 | 0x0C, + 28547 - 19968: jis0212<<14 | 0x27<<7 | 0x42, + 28548 - 19968: jis0208<<14 | 0x1F<<7 | 0x00, + 28550 - 19968: jis0208<<14 | 0x3E<<7 | 0x03, + 28551 - 19968: jis0212<<14 | 0x27<<7 | 0x43, + 28552 - 19968: jis0208<<14 | 0x59<<7 | 0x4D, + 28555 - 19968: jis0212<<14 | 0x27<<7 | 0x45, + 28556 - 19968: jis0212<<14 | 0x27<<7 | 0x46, + 28557 - 19968: jis0212<<14 | 0x27<<7 | 0x47, + 28558 - 19968: jis0208<<14 | 0x3E<<7 | 0x0F, + 28560 - 19968: jis0212<<14 | 0x27<<7 | 0x48, + 28561 - 19968: jis0208<<14 | 0x3E<<7 | 0x10, + 28562 - 19968: jis0212<<14 | 0x27<<7 | 0x49, + 28563 - 19968: jis0212<<14 | 0x27<<7 | 0x4A, + 28564 - 19968: jis0212<<14 | 0x27<<7 | 0x4B, + 28566 - 19968: jis0212<<14 | 0x27<<7 | 0x4C, + 28567 - 19968: jis0208<<14 | 0x13<<7 | 0x21, + 28570 - 19968: jis0212<<14 | 0x27<<7 | 0x4D, + 28575 - 19968: jis0212<<14 | 0x27<<7 | 0x4E, + 28576 - 19968: jis0212<<14 | 0x27<<7 | 0x4F, + 28577 - 19968: jis0208<<14 | 0x3E<<7 | 0x15, + 28579 - 19968: jis0208<<14 | 0x3E<<7 | 0x14, + 28580 - 19968: jis0208<<14 | 0x3E<<7 | 0x16, + 28581 - 19968: jis0212<<14 | 0x27<<7 | 0x50, + 28582 - 19968: jis0212<<14 | 0x27<<7 | 0x51, + 28583 - 19968: jis0212<<14 | 0x27<<7 | 0x52, + 28584 - 19968: jis0212<<14 | 0x27<<7 | 0x53, + 28586 - 19968: jis0208<<14 | 0x3E<<7 | 0x19, + 28590 - 19968: jis0212<<14 | 0x27<<7 | 0x54, + 28591 - 19968: jis0212<<14 | 0x27<<7 | 0x55, + 28592 - 19968: jis0212<<14 | 0x27<<7 | 0x56, + 28593 - 19968: jis0208<<14 | 0x24<<7 | 0x22, + 28595 - 19968: jis0208<<14 | 0x3E<<7 | 0x13, + 28597 - 19968: jis0208<<14 | 0x59<<7 | 0x4E, + 28598 - 19968: jis0212<<14 | 0x27<<7 | 0x58, + 28601 - 19968: jis0208<<14 | 0x3E<<7 | 0x17, + 28604 - 19968: jis0212<<14 | 0x27<<7 | 0x59, + 28608 - 19968: jis0208<<14 | 0x16<<7 | 0x42, + 28609 - 19968: jis0208<<14 | 0x21<<7 | 0x58, + 28610 - 19968: jis0208<<14 | 0x3E<<7 | 0x11, + 28611 - 19968: jis0208<<14 | 0x26<<7 | 0x1A, + 28613 - 19968: jis0212<<14 | 0x27<<7 | 0x5A, + 28614 - 19968: jis0208<<14 | 0x3E<<7 | 0x18, + 28615 - 19968: jis0212<<14 | 0x27<<7 | 0x5B, + 28616 - 19968: jis0212<<14 | 0x27<<7 | 0x5C, + 28618 - 19968: jis0212<<14 | 0x27<<7 | 0x5D, + 28628 - 19968: jis0208<<14 | 0x3E<<7 | 0x1D, + 28629 - 19968: jis0208<<14 | 0x3E<<7 | 0x1B, + 28632 - 19968: jis0208<<14 | 0x3E<<7 | 0x1E, + 28634 - 19968: jis0212<<14 | 0x28<<7 | 0x00, + 28635 - 19968: jis0208<<14 | 0x3E<<7 | 0x21, + 28638 - 19968: jis0212<<14 | 0x28<<7 | 0x01, + 28639 - 19968: jis0208<<14 | 0x3E<<7 | 0x1A, + 28640 - 19968: jis0208<<14 | 0x18<<7 | 0x49, + 28641 - 19968: jis0208<<14 | 0x26<<7 | 0x07, + 28644 - 19968: jis0208<<14 | 0x3D<<7 | 0x18, + 28648 - 19968: jis0212<<14 | 0x28<<7 | 0x02, + 28649 - 19968: jis0212<<14 | 0x28<<7 | 0x03, + 28651 - 19968: jis0208<<14 | 0x2C<<7 | 0x53, + 28652 - 19968: jis0208<<14 | 0x3E<<7 | 0x1C, + 28654 - 19968: jis0208<<14 | 0x3E<<7 | 0x20, + 28655 - 19968: jis0208<<14 | 0x21<<7 | 0x54, + 28656 - 19968: jis0212<<14 | 0x28<<7 | 0x04, + 28657 - 19968: jis0208<<14 | 0x3E<<7 | 0x1F, + 28659 - 19968: jis0208<<14 | 0x3E<<7 | 0x0A, + 28661 - 19968: jis0208<<14 | 0x59<<7 | 0x4F, + 28662 - 19968: jis0208<<14 | 0x4E<<7 | 0x48, + 28665 - 19968: jis0212<<14 | 0x28<<7 | 0x06, + 28666 - 19968: jis0208<<14 | 0x3E<<7 | 0x24, + 28668 - 19968: jis0212<<14 | 0x28<<7 | 0x07, + 28669 - 19968: jis0212<<14 | 0x28<<7 | 0x08, + 28670 - 19968: jis0208<<14 | 0x3E<<7 | 0x28, + 28672 - 19968: jis0212<<14 | 0x28<<7 | 0x09, + 28673 - 19968: jis0208<<14 | 0x3E<<7 | 0x26, + 28677 - 19968: jis0208<<14 | 0x59<<7 | 0x50, + 28678 - 19968: jis0212<<14 | 0x28<<7 | 0x0B, + 28679 - 19968: jis0208<<14 | 0x59<<7 | 0x51, + 28681 - 19968: jis0208<<14 | 0x3E<<7 | 0x22, + 28683 - 19968: jis0208<<14 | 0x3E<<7 | 0x23, + 28685 - 19968: jis0212<<14 | 0x28<<7 | 0x0D, + 28687 - 19968: jis0208<<14 | 0x3E<<7 | 0x27, + 28689 - 19968: jis0208<<14 | 0x3E<<7 | 0x25, + 28693 - 19968: jis0208<<14 | 0x28<<7 | 0x2D, + 28695 - 19968: jis0212<<14 | 0x28<<7 | 0x0E, + 28696 - 19968: jis0208<<14 | 0x3E<<7 | 0x2D, + 28698 - 19968: jis0208<<14 | 0x3E<<7 | 0x2A, + 28699 - 19968: jis0208<<14 | 0x3E<<7 | 0x29, + 28701 - 19968: jis0208<<14 | 0x3E<<7 | 0x2C, + 28702 - 19968: jis0208<<14 | 0x25<<7 | 0x33, + 28703 - 19968: jis0208<<14 | 0x3E<<7 | 0x2E, + 28704 - 19968: jis0212<<14 | 0x28<<7 | 0x0F, + 28707 - 19968: jis0212<<14 | 0x28<<7 | 0x10, + 28710 - 19968: jis0208<<14 | 0x22<<7 | 0x54, + 28711 - 19968: jis0208<<14 | 0x21<<7 | 0x4C, + 28712 - 19968: jis0208<<14 | 0x59<<7 | 0x52, + 28716 - 19968: jis0208<<14 | 0x1F<<7 | 0x04, + 28719 - 19968: jis0212<<14 | 0x28<<7 | 0x11, + 28720 - 19968: jis0208<<14 | 0x3E<<7 | 0x2F, + 28722 - 19968: jis0208<<14 | 0x3E<<7 | 0x31, + 28724 - 19968: jis0212<<14 | 0x28<<7 | 0x12, + 28727 - 19968: jis0212<<14 | 0x28<<7 | 0x13, + 28729 - 19968: jis0212<<14 | 0x28<<7 | 0x14, + 28732 - 19968: jis0212<<14 | 0x28<<7 | 0x15, + 28734 - 19968: jis0208<<14 | 0x3E<<7 | 0x30, + 28739 - 19968: jis0212<<14 | 0x28<<7 | 0x16, + 28740 - 19968: jis0212<<14 | 0x28<<7 | 0x17, + 28744 - 19968: jis0212<<14 | 0x28<<7 | 0x18, + 28745 - 19968: jis0212<<14 | 0x28<<7 | 0x19, + 28746 - 19968: jis0212<<14 | 0x28<<7 | 0x1A, + 28747 - 19968: jis0212<<14 | 0x28<<7 | 0x1B, + 28748 - 19968: jis0208<<14 | 0x3D<<7 | 0x54, + 28750 - 19968: jis0212<<14 | 0x28<<7 | 0x20, + 28753 - 19968: jis0208<<14 | 0x3E<<7 | 0x32, + 28756 - 19968: jis0212<<14 | 0x28<<7 | 0x1C, + 28757 - 19968: jis0212<<14 | 0x28<<7 | 0x1D, + 28760 - 19968: jis0208<<14 | 0x25<<7 | 0x46, + 28765 - 19968: jis0212<<14 | 0x28<<7 | 0x1E, + 28766 - 19968: jis0212<<14 | 0x28<<7 | 0x1F, + 28771 - 19968: jis0208<<14 | 0x3E<<7 | 0x33, + 28772 - 19968: jis0212<<14 | 0x28<<7 | 0x21, + 28773 - 19968: jis0212<<14 | 0x28<<7 | 0x22, + 28779 - 19968: jis0208<<14 | 0x11<<7 | 0x2F, + 28780 - 19968: jis0212<<14 | 0x28<<7 | 0x23, + 28782 - 19968: jis0212<<14 | 0x28<<7 | 0x24, + 28783 - 19968: jis0208<<14 | 0x24<<7 | 0x53, + 28784 - 19968: jis0208<<14 | 0x12<<7 | 0x04, + 28789 - 19968: jis0212<<14 | 0x28<<7 | 0x25, + 28790 - 19968: jis0212<<14 | 0x28<<7 | 0x26, + 28792 - 19968: jis0208<<14 | 0x14<<7 | 0x43, + 28796 - 19968: jis0208<<14 | 0x1B<<7 | 0x3D, + 28797 - 19968: jis0208<<14 | 0x19<<7 | 0x31, + 28798 - 19968: jis0212<<14 | 0x28<<7 | 0x27, + 28801 - 19968: jis0212<<14 | 0x28<<7 | 0x28, + 28805 - 19968: jis0208<<14 | 0x59<<7 | 0x53, + 28806 - 19968: jis0212<<14 | 0x28<<7 | 0x2A, + 28809 - 19968: jis0208<<14 | 0x2E<<7 | 0x06, + 28810 - 19968: jis0208<<14 | 0x1E<<7 | 0x45, + 28814 - 19968: jis0208<<14 | 0x10<<7 | 0x49, + 28818 - 19968: jis0208<<14 | 0x3E<<7 | 0x35, + 28820 - 19968: jis0212<<14 | 0x28<<7 | 0x2B, + 28821 - 19968: jis0212<<14 | 0x28<<7 | 0x2C, + 28822 - 19968: jis0212<<14 | 0x28<<7 | 0x2D, + 28823 - 19968: jis0212<<14 | 0x28<<7 | 0x2E, + 28824 - 19968: jis0212<<14 | 0x28<<7 | 0x2F, + 28825 - 19968: jis0208<<14 | 0x3E<<7 | 0x34, + 28827 - 19968: jis0212<<14 | 0x28<<7 | 0x30, + 28836 - 19968: jis0212<<14 | 0x28<<7 | 0x31, + 28843 - 19968: jis0208<<14 | 0x59<<7 | 0x54, + 28844 - 19968: jis0208<<14 | 0x3E<<7 | 0x38, + 28845 - 19968: jis0208<<14 | 0x22<<7 | 0x19, + 28846 - 19968: jis0208<<14 | 0x3E<<7 | 0x3B, + 28847 - 19968: jis0208<<14 | 0x3E<<7 | 0x36, + 28848 - 19968: jis0212<<14 | 0x28<<7 | 0x33, + 28849 - 19968: jis0212<<14 | 0x28<<7 | 0x34, + 28851 - 19968: jis0208<<14 | 0x3E<<7 | 0x3A, + 28852 - 19968: jis0212<<14 | 0x28<<7 | 0x35, + 28855 - 19968: jis0212<<14 | 0x28<<7 | 0x36, + 28856 - 19968: jis0208<<14 | 0x3E<<7 | 0x39, + 28857 - 19968: jis0208<<14 | 0x24<<7 | 0x1F, + 28858 - 19968: jis0208<<14 | 0x0F<<7 | 0x38, + 28859 - 19968: jis0208<<14 | 0x58<<7 | 0x06, + 28872 - 19968: jis0208<<14 | 0x2D<<7 | 0x54, + 28874 - 19968: jis0212<<14 | 0x28<<7 | 0x37, + 28875 - 19968: jis0208<<14 | 0x3E<<7 | 0x3D, + 28879 - 19968: jis0208<<14 | 0x10<<7 | 0x07, + 28881 - 19968: jis0212<<14 | 0x28<<7 | 0x38, + 28883 - 19968: jis0212<<14 | 0x28<<7 | 0x39, + 28884 - 19968: jis0212<<14 | 0x28<<7 | 0x3A, + 28885 - 19968: jis0212<<14 | 0x28<<7 | 0x3B, + 28886 - 19968: jis0212<<14 | 0x28<<7 | 0x3C, + 28888 - 19968: jis0212<<14 | 0x28<<7 | 0x3D, + 28889 - 19968: jis0208<<14 | 0x3E<<7 | 0x3F, + 28892 - 19968: jis0212<<14 | 0x28<<7 | 0x3E, + 28893 - 19968: jis0208<<14 | 0x3E<<7 | 0x3E, + 28895 - 19968: jis0208<<14 | 0x3E<<7 | 0x3C, + 28900 - 19968: jis0212<<14 | 0x28<<7 | 0x3F, + 28913 - 19968: jis0208<<14 | 0x3E<<7 | 0x37, + 28921 - 19968: jis0208<<14 | 0x2A<<7 | 0x02, + 28922 - 19968: jis0212<<14 | 0x28<<7 | 0x40, + 28925 - 19968: jis0208<<14 | 0x3E<<7 | 0x41, + 28931 - 19968: jis0212<<14 | 0x28<<7 | 0x41, + 28932 - 19968: jis0208<<14 | 0x59<<7 | 0x56, + 28933 - 19968: jis0212<<14 | 0x28<<7 | 0x43, + 28934 - 19968: jis0212<<14 | 0x28<<7 | 0x44, + 28935 - 19968: jis0212<<14 | 0x28<<7 | 0x45, + 28937 - 19968: jis0208<<14 | 0x3E<<7 | 0x40, + 28939 - 19968: jis0212<<14 | 0x28<<7 | 0x46, + 28940 - 19968: jis0212<<14 | 0x28<<7 | 0x47, + 28943 - 19968: jis0208<<14 | 0x59<<7 | 0x55, + 28948 - 19968: jis0208<<14 | 0x10<<7 | 0x4A, + 28953 - 19968: jis0208<<14 | 0x3E<<7 | 0x43, + 28954 - 19968: jis0208<<14 | 0x29<<7 | 0x11, + 28956 - 19968: jis0208<<14 | 0x3E<<7 | 0x42, + 28958 - 19968: jis0212<<14 | 0x28<<7 | 0x49, + 28960 - 19968: jis0212<<14 | 0x28<<7 | 0x4A, + 28961 - 19968: jis0208<<14 | 0x2B<<7 | 0x14, + 28966 - 19968: jis0208<<14 | 0x1D<<7 | 0x26, + 28971 - 19968: jis0212<<14 | 0x28<<7 | 0x4B, + 28973 - 19968: jis0212<<14 | 0x28<<7 | 0x4C, + 28975 - 19968: jis0212<<14 | 0x28<<7 | 0x4D, + 28976 - 19968: jis0212<<14 | 0x28<<7 | 0x4E, + 28977 - 19968: jis0212<<14 | 0x28<<7 | 0x4F, + 28982 - 19968: jis0208<<14 | 0x20<<7 | 0x12, + 28984 - 19968: jis0212<<14 | 0x28<<7 | 0x50, + 28988 - 19968: jis0208<<14 | 0x1D<<7 | 0x25, + 28993 - 19968: jis0212<<14 | 0x28<<7 | 0x51, + 28997 - 19968: jis0212<<14 | 0x28<<7 | 0x52, + 28998 - 19968: jis0208<<14 | 0x59<<7 | 0x58, + 28999 - 19968: jis0208<<14 | 0x59<<7 | 0x59, + 29001 - 19968: jis0208<<14 | 0x2D<<7 | 0x5A, + 29002 - 19968: jis0212<<14 | 0x28<<7 | 0x55, + 29003 - 19968: jis0212<<14 | 0x28<<7 | 0x56, + 29004 - 19968: jis0208<<14 | 0x3E<<7 | 0x49, + 29006 - 19968: jis0208<<14 | 0x1F<<7 | 0x58, + 29008 - 19968: jis0212<<14 | 0x28<<7 | 0x57, + 29010 - 19968: jis0212<<14 | 0x28<<7 | 0x58, + 29013 - 19968: jis0208<<14 | 0x3E<<7 | 0x45, + 29014 - 19968: jis0208<<14 | 0x3E<<7 | 0x4A, + 29015 - 19968: jis0212<<14 | 0x28<<7 | 0x59, + 29017 - 19968: jis0208<<14 | 0x10<<7 | 0x4B, + 29018 - 19968: jis0212<<14 | 0x28<<7 | 0x5A, + 29020 - 19968: jis0208<<14 | 0x59<<7 | 0x57, + 29022 - 19968: jis0212<<14 | 0x28<<7 | 0x5C, + 29024 - 19968: jis0212<<14 | 0x28<<7 | 0x5D, + 29026 - 19968: jis0208<<14 | 0x3E<<7 | 0x48, + 29028 - 19968: jis0208<<14 | 0x26<<7 | 0x40, + 29029 - 19968: jis0208<<14 | 0x3E<<7 | 0x44, + 29030 - 19968: jis0208<<14 | 0x3E<<7 | 0x47, + 29031 - 19968: jis0208<<14 | 0x1D<<7 | 0x27, + 29032 - 19968: jis0212<<14 | 0x29<<7 | 0x00, + 29033 - 19968: jis0208<<14 | 0x27<<7 | 0x30, + 29036 - 19968: jis0208<<14 | 0x3E<<7 | 0x4B, + 29038 - 19968: jis0208<<14 | 0x1B<<7 | 0x30, + 29049 - 19968: jis0212<<14 | 0x29<<7 | 0x01, + 29053 - 19968: jis0208<<14 | 0x1F<<7 | 0x59, + 29056 - 19968: jis0212<<14 | 0x29<<7 | 0x02, + 29060 - 19968: jis0208<<14 | 0x3E<<7 | 0x4E, + 29061 - 19968: jis0212<<14 | 0x29<<7 | 0x03, + 29063 - 19968: jis0212<<14 | 0x29<<7 | 0x04, + 29064 - 19968: jis0208<<14 | 0x3E<<7 | 0x46, + 29066 - 19968: jis0208<<14 | 0x16<<7 | 0x06, + 29068 - 19968: jis0212<<14 | 0x29<<7 | 0x05, + 29071 - 19968: jis0208<<14 | 0x3E<<7 | 0x4C, + 29074 - 19968: jis0212<<14 | 0x29<<7 | 0x06, + 29076 - 19968: jis0208<<14 | 0x2C<<7 | 0x2F, + 29077 - 19968: jis0208<<14 | 0x3E<<7 | 0x4F, + 29081 - 19968: jis0208<<14 | 0x53<<7 | 0x05, + 29082 - 19968: jis0212<<14 | 0x29<<7 | 0x07, + 29083 - 19968: jis0212<<14 | 0x29<<7 | 0x08, + 29087 - 19968: jis0208<<14 | 0x1C<<7 | 0x2E, + 29088 - 19968: jis0212<<14 | 0x29<<7 | 0x09, + 29090 - 19968: jis0212<<14 | 0x29<<7 | 0x0A, + 29096 - 19968: jis0208<<14 | 0x3E<<7 | 0x50, + 29100 - 19968: jis0208<<14 | 0x3E<<7 | 0x51, + 29103 - 19968: jis0212<<14 | 0x29<<7 | 0x0B, + 29104 - 19968: jis0212<<14 | 0x29<<7 | 0x0C, + 29105 - 19968: jis0208<<14 | 0x26<<7 | 0x0D, + 29106 - 19968: jis0212<<14 | 0x29<<7 | 0x0D, + 29107 - 19968: jis0212<<14 | 0x29<<7 | 0x0E, + 29113 - 19968: jis0208<<14 | 0x3E<<7 | 0x53, + 29114 - 19968: jis0212<<14 | 0x29<<7 | 0x0F, + 29118 - 19968: jis0208<<14 | 0x3E<<7 | 0x54, + 29119 - 19968: jis0212<<14 | 0x29<<7 | 0x10, + 29120 - 19968: jis0212<<14 | 0x29<<7 | 0x11, + 29121 - 19968: jis0208<<14 | 0x59<<7 | 0x5B, + 29123 - 19968: jis0208<<14 | 0x26<<7 | 0x12, + 29124 - 19968: jis0212<<14 | 0x29<<7 | 0x13, + 29128 - 19968: jis0208<<14 | 0x24<<7 | 0x54, + 29129 - 19968: jis0208<<14 | 0x3E<<7 | 0x56, + 29131 - 19968: jis0212<<14 | 0x29<<7 | 0x14, + 29132 - 19968: jis0212<<14 | 0x29<<7 | 0x15, + 29134 - 19968: jis0208<<14 | 0x3E<<7 | 0x58, + 29136 - 19968: jis0208<<14 | 0x2D<<7 | 0x34, + 29138 - 19968: jis0208<<14 | 0x3E<<7 | 0x55, + 29139 - 19968: jis0212<<14 | 0x29<<7 | 0x16, + 29140 - 19968: jis0208<<14 | 0x3E<<7 | 0x57, + 29141 - 19968: jis0208<<14 | 0x10<<7 | 0x4C, + 29142 - 19968: jis0212<<14 | 0x29<<7 | 0x17, + 29143 - 19968: jis0208<<14 | 0x3E<<7 | 0x52, + 29145 - 19968: jis0212<<14 | 0x29<<7 | 0x18, + 29146 - 19968: jis0212<<14 | 0x29<<7 | 0x19, + 29148 - 19968: jis0212<<14 | 0x29<<7 | 0x1A, + 29151 - 19968: jis0208<<14 | 0x32<<7 | 0x3A, + 29152 - 19968: jis0208<<14 | 0x3E<<7 | 0x59, + 29157 - 19968: jis0208<<14 | 0x20<<7 | 0x46, + 29158 - 19968: jis0208<<14 | 0x1A<<7 | 0x17, + 29159 - 19968: jis0208<<14 | 0x3E<<7 | 0x5B, + 29164 - 19968: jis0208<<14 | 0x3E<<7 | 0x5A, + 29165 - 19968: jis0208<<14 | 0x1E<<7 | 0x03, + 29166 - 19968: jis0208<<14 | 0x31<<7 | 0x38, + 29173 - 19968: jis0208<<14 | 0x3E<<7 | 0x5C, + 29176 - 19968: jis0212<<14 | 0x29<<7 | 0x1B, + 29177 - 19968: jis0208<<14 | 0x3F<<7 | 0x00, + 29179 - 19968: jis0208<<14 | 0x3E<<7 | 0x4D, + 29180 - 19968: jis0208<<14 | 0x3E<<7 | 0x5D, + 29182 - 19968: jis0208<<14 | 0x59<<7 | 0x5C, + 29183 - 19968: jis0208<<14 | 0x3F<<7 | 0x01, + 29184 - 19968: jis0212<<14 | 0x29<<7 | 0x1D, + 29190 - 19968: jis0208<<14 | 0x26<<7 | 0x59, + 29191 - 19968: jis0212<<14 | 0x29<<7 | 0x1E, + 29192 - 19968: jis0212<<14 | 0x29<<7 | 0x1F, + 29193 - 19968: jis0212<<14 | 0x29<<7 | 0x20, + 29197 - 19968: jis0208<<14 | 0x3F<<7 | 0x02, + 29200 - 19968: jis0208<<14 | 0x3F<<7 | 0x03, + 29203 - 19968: jis0212<<14 | 0x29<<7 | 0x21, + 29207 - 19968: jis0212<<14 | 0x29<<7 | 0x22, + 29210 - 19968: jis0212<<14 | 0x29<<7 | 0x23, + 29211 - 19968: jis0208<<14 | 0x3F<<7 | 0x04, + 29213 - 19968: jis0212<<14 | 0x29<<7 | 0x24, + 29215 - 19968: jis0212<<14 | 0x29<<7 | 0x25, + 29220 - 19968: jis0212<<14 | 0x29<<7 | 0x26, + 29224 - 19968: jis0208<<14 | 0x3F<<7 | 0x05, + 29226 - 19968: jis0208<<14 | 0x23<<7 | 0x3D, + 29227 - 19968: jis0212<<14 | 0x29<<7 | 0x27, + 29228 - 19968: jis0208<<14 | 0x3F<<7 | 0x07, + 29229 - 19968: jis0208<<14 | 0x3F<<7 | 0x06, + 29231 - 19968: jis0212<<14 | 0x29<<7 | 0x28, + 29232 - 19968: jis0208<<14 | 0x3F<<7 | 0x08, + 29234 - 19968: jis0208<<14 | 0x3F<<7 | 0x09, + 29236 - 19968: jis0212<<14 | 0x29<<7 | 0x29, + 29237 - 19968: jis0208<<14 | 0x1B<<7 | 0x3E, + 29238 - 19968: jis0208<<14 | 0x28<<7 | 0x42, + 29240 - 19968: jis0212<<14 | 0x29<<7 | 0x2A, + 29241 - 19968: jis0212<<14 | 0x29<<7 | 0x2B, + 29242 - 19968: jis0208<<14 | 0x2B<<7 | 0x4B, + 29243 - 19968: jis0208<<14 | 0x3F<<7 | 0x0A, + 29244 - 19968: jis0208<<14 | 0x3F<<7 | 0x0B, + 29245 - 19968: jis0208<<14 | 0x20<<7 | 0x35, + 29246 - 19968: jis0208<<14 | 0x1B<<7 | 0x03, + 29247 - 19968: jis0208<<14 | 0x3F<<7 | 0x0C, + 29248 - 19968: jis0208<<14 | 0x3F<<7 | 0x0D, + 29249 - 19968: jis0212<<14 | 0x29<<7 | 0x2C, + 29250 - 19968: jis0212<<14 | 0x29<<7 | 0x2D, + 29251 - 19968: jis0212<<14 | 0x29<<7 | 0x2E, + 29253 - 19968: jis0212<<14 | 0x29<<7 | 0x2F, + 29254 - 19968: jis0208<<14 | 0x3F<<7 | 0x0E, + 29255 - 19968: jis0208<<14 | 0x29<<7 | 0x31, + 29256 - 19968: jis0208<<14 | 0x27<<7 | 0x26, + 29259 - 19968: jis0208<<14 | 0x3F<<7 | 0x0F, + 29260 - 19968: jis0208<<14 | 0x26<<7 | 0x36, + 29262 - 19968: jis0212<<14 | 0x29<<7 | 0x30, + 29263 - 19968: jis0212<<14 | 0x29<<7 | 0x31, + 29264 - 19968: jis0212<<14 | 0x29<<7 | 0x32, + 29266 - 19968: jis0208<<14 | 0x23<<7 | 0x0C, + 29267 - 19968: jis0212<<14 | 0x29<<7 | 0x33, + 29269 - 19968: jis0212<<14 | 0x29<<7 | 0x34, + 29270 - 19968: jis0212<<14 | 0x29<<7 | 0x35, + 29272 - 19968: jis0208<<14 | 0x3F<<7 | 0x10, + 29273 - 19968: jis0208<<14 | 0x11<<7 | 0x46, + 29274 - 19968: jis0212<<14 | 0x29<<7 | 0x36, + 29275 - 19968: jis0208<<14 | 0x14<<7 | 0x4C, + 29276 - 19968: jis0212<<14 | 0x29<<7 | 0x37, + 29277 - 19968: jis0208<<14 | 0x2B<<7 | 0x25, + 29278 - 19968: jis0212<<14 | 0x29<<7 | 0x38, + 29279 - 19968: jis0208<<14 | 0x2B<<7 | 0x15, + 29280 - 19968: jis0212<<14 | 0x29<<7 | 0x39, + 29281 - 19968: jis0208<<14 | 0x11<<7 | 0x13, + 29282 - 19968: jis0208<<14 | 0x2E<<7 | 0x13, + 29283 - 19968: jis0212<<14 | 0x29<<7 | 0x3A, + 29287 - 19968: jis0208<<14 | 0x2A<<7 | 0x31, + 29288 - 19968: jis0212<<14 | 0x29<<7 | 0x3B, + 29289 - 19968: jis0208<<14 | 0x29<<7 | 0x09, + 29291 - 19968: jis0212<<14 | 0x29<<7 | 0x3C, + 29294 - 19968: jis0212<<14 | 0x29<<7 | 0x3D, + 29295 - 19968: jis0212<<14 | 0x29<<7 | 0x3E, + 29297 - 19968: jis0212<<14 | 0x29<<7 | 0x3F, + 29298 - 19968: jis0208<<14 | 0x1F<<7 | 0x16, + 29300 - 19968: jis0208<<14 | 0x3F<<7 | 0x11, + 29303 - 19968: jis0212<<14 | 0x29<<7 | 0x40, + 29304 - 19968: jis0212<<14 | 0x29<<7 | 0x41, + 29305 - 19968: jis0208<<14 | 0x25<<7 | 0x22, + 29307 - 19968: jis0212<<14 | 0x29<<7 | 0x42, + 29308 - 19968: jis0212<<14 | 0x29<<7 | 0x43, + 29309 - 19968: jis0208<<14 | 0x17<<7 | 0x02, + 29310 - 19968: jis0208<<14 | 0x3F<<7 | 0x12, + 29311 - 19968: jis0212<<14 | 0x29<<7 | 0x44, + 29312 - 19968: jis0208<<14 | 0x19<<7 | 0x33, + 29313 - 19968: jis0208<<14 | 0x3F<<7 | 0x14, + 29314 - 19968: jis0208<<14 | 0x3F<<7 | 0x13, + 29316 - 19968: jis0212<<14 | 0x29<<7 | 0x45, + 29319 - 19968: jis0208<<14 | 0x3F<<7 | 0x15, + 29321 - 19968: jis0212<<14 | 0x29<<7 | 0x46, + 29325 - 19968: jis0212<<14 | 0x29<<7 | 0x47, + 29326 - 19968: jis0212<<14 | 0x29<<7 | 0x48, + 29330 - 19968: jis0208<<14 | 0x3F<<7 | 0x16, + 29331 - 19968: jis0212<<14 | 0x29<<7 | 0x49, + 29334 - 19968: jis0208<<14 | 0x3F<<7 | 0x17, + 29339 - 19968: jis0212<<14 | 0x29<<7 | 0x4A, + 29344 - 19968: jis0208<<14 | 0x14<<7 | 0x1D, + 29346 - 19968: jis0208<<14 | 0x3F<<7 | 0x18, + 29351 - 19968: jis0208<<14 | 0x3F<<7 | 0x19, + 29352 - 19968: jis0212<<14 | 0x29<<7 | 0x4B, + 29356 - 19968: jis0208<<14 | 0x17<<7 | 0x03, + 29357 - 19968: jis0212<<14 | 0x29<<7 | 0x4C, + 29358 - 19968: jis0212<<14 | 0x29<<7 | 0x4D, + 29359 - 19968: jis0208<<14 | 0x27<<7 | 0x27, + 29361 - 19968: jis0208<<14 | 0x59<<7 | 0x5D, + 29362 - 19968: jis0208<<14 | 0x3F<<7 | 0x1B, + 29364 - 19968: jis0212<<14 | 0x29<<7 | 0x4F, + 29366 - 19968: jis0208<<14 | 0x1D<<7 | 0x54, + 29369 - 19968: jis0208<<14 | 0x3F<<7 | 0x1A, + 29374 - 19968: jis0208<<14 | 0x5A<<7 | 0x00, + 29377 - 19968: jis0212<<14 | 0x29<<7 | 0x51, + 29378 - 19968: jis0208<<14 | 0x15<<7 | 0x17, + 29379 - 19968: jis0208<<14 | 0x3F<<7 | 0x1C, + 29380 - 19968: jis0208<<14 | 0x3F<<7 | 0x1E, + 29382 - 19968: jis0208<<14 | 0x3F<<7 | 0x1D, + 29383 - 19968: jis0212<<14 | 0x29<<7 | 0x52, + 29385 - 19968: jis0212<<14 | 0x29<<7 | 0x53, + 29388 - 19968: jis0212<<14 | 0x29<<7 | 0x54, + 29390 - 19968: jis0208<<14 | 0x3F<<7 | 0x1F, + 29392 - 19968: jis0208<<14 | 0x17<<7 | 0x30, + 29394 - 19968: jis0208<<14 | 0x3F<<7 | 0x20, + 29397 - 19968: jis0212<<14 | 0x29<<7 | 0x55, + 29398 - 19968: jis0212<<14 | 0x29<<7 | 0x56, + 29399 - 19968: jis0208<<14 | 0x15<<7 | 0x48, + 29400 - 19968: jis0212<<14 | 0x29<<7 | 0x57, + 29401 - 19968: jis0208<<14 | 0x20<<7 | 0x1F, + 29403 - 19968: jis0208<<14 | 0x18<<7 | 0x5C, + 29407 - 19968: jis0212<<14 | 0x29<<7 | 0x58, + 29408 - 19968: jis0208<<14 | 0x3F<<7 | 0x22, + 29409 - 19968: jis0208<<14 | 0x3F<<7 | 0x23, + 29410 - 19968: jis0208<<14 | 0x3F<<7 | 0x21, + 29413 - 19968: jis0212<<14 | 0x29<<7 | 0x59, + 29417 - 19968: jis0208<<14 | 0x1B<<7 | 0x4C, + 29420 - 19968: jis0208<<14 | 0x25<<7 | 0x27, + 29421 - 19968: jis0208<<14 | 0x15<<7 | 0x18, + 29427 - 19968: jis0212<<14 | 0x29<<7 | 0x5A, + 29428 - 19968: jis0212<<14 | 0x29<<7 | 0x5B, + 29431 - 19968: jis0208<<14 | 0x3F<<7 | 0x25, + 29432 - 19968: jis0208<<14 | 0x22<<7 | 0x0B, + 29433 - 19968: jis0208<<14 | 0x3F<<7 | 0x24, + 29434 - 19968: jis0212<<14 | 0x29<<7 | 0x5C, + 29435 - 19968: jis0212<<14 | 0x29<<7 | 0x5D, + 29436 - 19968: jis0208<<14 | 0x2E<<7 | 0x14, + 29437 - 19968: jis0208<<14 | 0x26<<7 | 0x41, + 29438 - 19968: jis0212<<14 | 0x2A<<7 | 0x00, + 29442 - 19968: jis0212<<14 | 0x2A<<7 | 0x01, + 29444 - 19968: jis0212<<14 | 0x2A<<7 | 0x02, + 29445 - 19968: jis0212<<14 | 0x2A<<7 | 0x03, + 29447 - 19968: jis0212<<14 | 0x2A<<7 | 0x04, + 29450 - 19968: jis0208<<14 | 0x3F<<7 | 0x28, + 29451 - 19968: jis0212<<14 | 0x2A<<7 | 0x05, + 29453 - 19968: jis0212<<14 | 0x2A<<7 | 0x06, + 29458 - 19968: jis0212<<14 | 0x2A<<7 | 0x07, + 29459 - 19968: jis0212<<14 | 0x2A<<7 | 0x08, + 29462 - 19968: jis0208<<14 | 0x3F<<7 | 0x2A, + 29463 - 19968: jis0208<<14 | 0x3F<<7 | 0x27, + 29464 - 19968: jis0212<<14 | 0x2A<<7 | 0x09, + 29465 - 19968: jis0212<<14 | 0x2A<<7 | 0x0A, + 29467 - 19968: jis0208<<14 | 0x2B<<7 | 0x33, + 29468 - 19968: jis0208<<14 | 0x3F<<7 | 0x29, + 29469 - 19968: jis0208<<14 | 0x3F<<7 | 0x2B, + 29470 - 19968: jis0212<<14 | 0x2A<<7 | 0x0B, + 29471 - 19968: jis0208<<14 | 0x2D<<7 | 0x23, + 29474 - 19968: jis0212<<14 | 0x2A<<7 | 0x0C, + 29476 - 19968: jis0208<<14 | 0x5A<<7 | 0x01, + 29477 - 19968: jis0208<<14 | 0x3F<<7 | 0x2F, + 29479 - 19968: jis0212<<14 | 0x2A<<7 | 0x0E, + 29480 - 19968: jis0212<<14 | 0x2A<<7 | 0x0F, + 29481 - 19968: jis0208<<14 | 0x3F<<7 | 0x2E, + 29482 - 19968: jis0208<<14 | 0x22<<7 | 0x55, + 29483 - 19968: jis0208<<14 | 0x26<<7 | 0x0C, + 29484 - 19968: jis0212<<14 | 0x2A<<7 | 0x10, + 29486 - 19968: jis0208<<14 | 0x17<<7 | 0x04, + 29487 - 19968: jis0208<<14 | 0x3F<<7 | 0x2D, + 29489 - 19968: jis0212<<14 | 0x2A<<7 | 0x11, + 29490 - 19968: jis0212<<14 | 0x2A<<7 | 0x12, + 29492 - 19968: jis0208<<14 | 0x3F<<7 | 0x2C, + 29493 - 19968: jis0212<<14 | 0x2A<<7 | 0x13, + 29494 - 19968: jis0208<<14 | 0x2C<<7 | 0x10, + 29495 - 19968: jis0208<<14 | 0x2C<<7 | 0x11, + 29498 - 19968: jis0212<<14 | 0x2A<<7 | 0x14, + 29499 - 19968: jis0212<<14 | 0x2A<<7 | 0x15, + 29501 - 19968: jis0212<<14 | 0x2A<<7 | 0x16, + 29502 - 19968: jis0208<<14 | 0x3F<<7 | 0x30, + 29503 - 19968: jis0208<<14 | 0x10<<7 | 0x4D, + 29507 - 19968: jis0212<<14 | 0x2A<<7 | 0x17, + 29508 - 19968: jis0208<<14 | 0x18<<7 | 0x55, + 29509 - 19968: jis0208<<14 | 0x1A<<7 | 0x41, + 29517 - 19968: jis0212<<14 | 0x2A<<7 | 0x18, + 29518 - 19968: jis0208<<14 | 0x3F<<7 | 0x31, + 29519 - 19968: jis0208<<14 | 0x3F<<7 | 0x32, + 29520 - 19968: jis0212<<14 | 0x2A<<7 | 0x19, + 29522 - 19968: jis0212<<14 | 0x2A<<7 | 0x1A, + 29526 - 19968: jis0212<<14 | 0x2A<<7 | 0x1B, + 29527 - 19968: jis0208<<14 | 0x3F<<7 | 0x34, + 29528 - 19968: jis0212<<14 | 0x2A<<7 | 0x1C, + 29533 - 19968: jis0212<<14 | 0x2A<<7 | 0x1D, + 29534 - 19968: jis0212<<14 | 0x2A<<7 | 0x1E, + 29535 - 19968: jis0212<<14 | 0x2A<<7 | 0x1F, + 29536 - 19968: jis0212<<14 | 0x2A<<7 | 0x20, + 29539 - 19968: jis0208<<14 | 0x1C<<7 | 0x22, + 29542 - 19968: jis0212<<14 | 0x2A<<7 | 0x21, + 29543 - 19968: jis0212<<14 | 0x2A<<7 | 0x22, + 29544 - 19968: jis0208<<14 | 0x3F<<7 | 0x36, + 29545 - 19968: jis0212<<14 | 0x2A<<7 | 0x23, + 29546 - 19968: jis0208<<14 | 0x3F<<7 | 0x35, + 29547 - 19968: jis0212<<14 | 0x2A<<7 | 0x24, + 29548 - 19968: jis0212<<14 | 0x2A<<7 | 0x25, + 29550 - 19968: jis0212<<14 | 0x2A<<7 | 0x26, + 29551 - 19968: jis0212<<14 | 0x2A<<7 | 0x27, + 29552 - 19968: jis0208<<14 | 0x3F<<7 | 0x37, + 29553 - 19968: jis0212<<14 | 0x2A<<7 | 0x28, + 29554 - 19968: jis0208<<14 | 0x12<<7 | 0x2C, + 29557 - 19968: jis0208<<14 | 0x3F<<7 | 0x39, + 29559 - 19968: jis0208<<14 | 0x5A<<7 | 0x03, + 29560 - 19968: jis0208<<14 | 0x3F<<7 | 0x38, + 29561 - 19968: jis0212<<14 | 0x2A<<7 | 0x2A, + 29562 - 19968: jis0208<<14 | 0x3F<<7 | 0x3B, + 29563 - 19968: jis0208<<14 | 0x3F<<7 | 0x3A, + 29564 - 19968: jis0212<<14 | 0x2A<<7 | 0x2B, + 29568 - 19968: jis0212<<14 | 0x2A<<7 | 0x2C, + 29569 - 19968: jis0212<<14 | 0x2A<<7 | 0x2D, + 29571 - 19968: jis0212<<14 | 0x2A<<7 | 0x2E, + 29572 - 19968: jis0208<<14 | 0x17<<7 | 0x1B, + 29573 - 19968: jis0212<<14 | 0x2A<<7 | 0x2F, + 29574 - 19968: jis0212<<14 | 0x2A<<7 | 0x30, + 29575 - 19968: jis0208<<14 | 0x2D<<7 | 0x07, + 29577 - 19968: jis0208<<14 | 0x15<<7 | 0x2B, + 29579 - 19968: jis0208<<14 | 0x11<<7 | 0x05, + 29582 - 19968: jis0212<<14 | 0x2A<<7 | 0x31, + 29584 - 19968: jis0212<<14 | 0x2A<<7 | 0x32, + 29587 - 19968: jis0212<<14 | 0x2A<<7 | 0x33, + 29589 - 19968: jis0212<<14 | 0x2A<<7 | 0x34, + 29590 - 19968: jis0208<<14 | 0x15<<7 | 0x49, + 29591 - 19968: jis0212<<14 | 0x2A<<7 | 0x35, + 29592 - 19968: jis0212<<14 | 0x2A<<7 | 0x36, + 29596 - 19968: jis0212<<14 | 0x2A<<7 | 0x37, + 29598 - 19968: jis0212<<14 | 0x2A<<7 | 0x38, + 29599 - 19968: jis0212<<14 | 0x2A<<7 | 0x39, + 29600 - 19968: jis0212<<14 | 0x2A<<7 | 0x3A, + 29602 - 19968: jis0212<<14 | 0x2A<<7 | 0x3B, + 29605 - 19968: jis0212<<14 | 0x2A<<7 | 0x3C, + 29606 - 19968: jis0212<<14 | 0x2A<<7 | 0x3D, + 29609 - 19968: jis0208<<14 | 0x13<<7 | 0x40, + 29610 - 19968: jis0212<<14 | 0x2A<<7 | 0x3E, + 29611 - 19968: jis0212<<14 | 0x2A<<7 | 0x3F, + 29613 - 19968: jis0212<<14 | 0x2A<<7 | 0x40, + 29618 - 19968: jis0208<<14 | 0x2D<<7 | 0x47, + 29619 - 19968: jis0208<<14 | 0x3F<<7 | 0x3D, + 29621 - 19968: jis0212<<14 | 0x2A<<7 | 0x41, + 29623 - 19968: jis0212<<14 | 0x2A<<7 | 0x42, + 29625 - 19968: jis0212<<14 | 0x2A<<7 | 0x43, + 29627 - 19968: jis0208<<14 | 0x3F<<7 | 0x3F, + 29628 - 19968: jis0212<<14 | 0x2A<<7 | 0x44, + 29629 - 19968: jis0208<<14 | 0x5A<<7 | 0x04, + 29631 - 19968: jis0212<<14 | 0x2A<<7 | 0x46, + 29632 - 19968: jis0208<<14 | 0x3F<<7 | 0x40, + 29634 - 19968: jis0208<<14 | 0x11<<7 | 0x30, + 29637 - 19968: jis0212<<14 | 0x2A<<7 | 0x47, + 29638 - 19968: jis0212<<14 | 0x2A<<7 | 0x48, + 29640 - 19968: jis0208<<14 | 0x3F<<7 | 0x3C, + 29641 - 19968: jis0208<<14 | 0x5A<<7 | 0x05, + 29642 - 19968: jis0208<<14 | 0x1A<<7 | 0x18, + 29643 - 19968: jis0212<<14 | 0x2A<<7 | 0x4A, + 29644 - 19968: jis0212<<14 | 0x2A<<7 | 0x4B, + 29645 - 19968: jis0208<<14 | 0x23<<7 | 0x20, + 29646 - 19968: jis0208<<14 | 0x3F<<7 | 0x3E, + 29647 - 19968: jis0212<<14 | 0x2A<<7 | 0x4C, + 29650 - 19968: jis0208<<14 | 0x5A<<7 | 0x08, + 29651 - 19968: jis0212<<14 | 0x2A<<7 | 0x4E, + 29654 - 19968: jis0208<<14 | 0x5A<<7 | 0x06, + 29657 - 19968: jis0212<<14 | 0x2A<<7 | 0x50, + 29661 - 19968: jis0212<<14 | 0x2A<<7 | 0x51, + 29662 - 19968: jis0208<<14 | 0x3F<<7 | 0x43, + 29664 - 19968: jis0208<<14 | 0x1B<<7 | 0x4D, + 29665 - 19968: jis0212<<14 | 0x2A<<7 | 0x52, + 29667 - 19968: jis0208<<14 | 0x5A<<7 | 0x07, + 29669 - 19968: jis0208<<14 | 0x3F<<7 | 0x41, + 29670 - 19968: jis0212<<14 | 0x2A<<7 | 0x54, + 29671 - 19968: jis0212<<14 | 0x2A<<7 | 0x55, + 29673 - 19968: jis0212<<14 | 0x2A<<7 | 0x56, + 29674 - 19968: jis0208<<14 | 0x16<<7 | 0x1D, + 29677 - 19968: jis0208<<14 | 0x27<<7 | 0x28, + 29678 - 19968: jis0208<<14 | 0x3F<<7 | 0x42, + 29681 - 19968: jis0208<<14 | 0x3F<<7 | 0x5D, + 29684 - 19968: jis0212<<14 | 0x2A<<7 | 0x57, + 29685 - 19968: jis0208<<14 | 0x5A<<7 | 0x0A, + 29687 - 19968: jis0212<<14 | 0x2A<<7 | 0x59, + 29688 - 19968: jis0208<<14 | 0x3F<<7 | 0x48, + 29689 - 19968: jis0212<<14 | 0x2A<<7 | 0x5A, + 29690 - 19968: jis0212<<14 | 0x2A<<7 | 0x5B, + 29691 - 19968: jis0212<<14 | 0x2A<<7 | 0x5C, + 29693 - 19968: jis0212<<14 | 0x2A<<7 | 0x5D, + 29694 - 19968: jis0208<<14 | 0x17<<7 | 0x1C, + 29695 - 19968: jis0212<<14 | 0x2B<<7 | 0x00, + 29696 - 19968: jis0212<<14 | 0x2B<<7 | 0x01, + 29697 - 19968: jis0212<<14 | 0x2B<<7 | 0x02, + 29699 - 19968: jis0208<<14 | 0x14<<7 | 0x44, + 29700 - 19968: jis0212<<14 | 0x2B<<7 | 0x03, + 29701 - 19968: jis0208<<14 | 0x3F<<7 | 0x45, + 29702 - 19968: jis0208<<14 | 0x2C<<7 | 0x5C, + 29703 - 19968: jis0208<<14 | 0x5A<<7 | 0x09, + 29705 - 19968: jis0208<<14 | 0x2D<<7 | 0x0F, + 29706 - 19968: jis0212<<14 | 0x2B<<7 | 0x05, + 29713 - 19968: jis0212<<14 | 0x2B<<7 | 0x06, + 29722 - 19968: jis0212<<14 | 0x2B<<7 | 0x07, + 29723 - 19968: jis0212<<14 | 0x2B<<7 | 0x08, + 29730 - 19968: jis0208<<14 | 0x21<<7 | 0x55, + 29732 - 19968: jis0212<<14 | 0x2B<<7 | 0x09, + 29733 - 19968: jis0208<<14 | 0x3F<<7 | 0x47, + 29734 - 19968: jis0208<<14 | 0x5A<<7 | 0x0B, + 29736 - 19968: jis0212<<14 | 0x2B<<7 | 0x0B, + 29737 - 19968: jis0208<<14 | 0x5A<<7 | 0x0D, + 29738 - 19968: jis0208<<14 | 0x5A<<7 | 0x0C, + 29739 - 19968: jis0212<<14 | 0x2B<<7 | 0x0E, + 29740 - 19968: jis0212<<14 | 0x2B<<7 | 0x0F, + 29741 - 19968: jis0212<<14 | 0x2B<<7 | 0x10, + 29742 - 19968: jis0208<<14 | 0x5A<<7 | 0x0E, + 29743 - 19968: jis0212<<14 | 0x2B<<7 | 0x12, + 29744 - 19968: jis0212<<14 | 0x2B<<7 | 0x13, + 29745 - 19968: jis0212<<14 | 0x2B<<7 | 0x14, + 29746 - 19968: jis0208<<14 | 0x3F<<7 | 0x49, + 29747 - 19968: jis0208<<14 | 0x2D<<7 | 0x35, + 29748 - 19968: jis0208<<14 | 0x15<<7 | 0x36, + 29749 - 19968: jis0208<<14 | 0x27<<7 | 0x5B, + 29750 - 19968: jis0208<<14 | 0x26<<7 | 0x29, + 29753 - 19968: jis0212<<14 | 0x2B<<7 | 0x15, + 29754 - 19968: jis0208<<14 | 0x3F<<7 | 0x4A, + 29759 - 19968: jis0208<<14 | 0x3F<<7 | 0x4C, + 29760 - 19968: jis0212<<14 | 0x2B<<7 | 0x16, + 29761 - 19968: jis0208<<14 | 0x3F<<7 | 0x4F, + 29763 - 19968: jis0212<<14 | 0x2B<<7 | 0x17, + 29764 - 19968: jis0212<<14 | 0x2B<<7 | 0x18, + 29766 - 19968: jis0212<<14 | 0x2B<<7 | 0x19, + 29767 - 19968: jis0212<<14 | 0x2B<<7 | 0x1A, + 29771 - 19968: jis0212<<14 | 0x2B<<7 | 0x1B, + 29773 - 19968: jis0212<<14 | 0x2B<<7 | 0x1C, + 29777 - 19968: jis0212<<14 | 0x2B<<7 | 0x1D, + 29778 - 19968: jis0212<<14 | 0x2B<<7 | 0x1E, + 29781 - 19968: jis0208<<14 | 0x3F<<7 | 0x4B, + 29783 - 19968: jis0212<<14 | 0x2B<<7 | 0x1F, + 29785 - 19968: jis0208<<14 | 0x3F<<7 | 0x4E, + 29786 - 19968: jis0208<<14 | 0x17<<7 | 0x49, + 29787 - 19968: jis0208<<14 | 0x10<<7 | 0x2C, + 29788 - 19968: jis0208<<14 | 0x3F<<7 | 0x50, + 29789 - 19968: jis0212<<14 | 0x2B<<7 | 0x20, + 29790 - 19968: jis0208<<14 | 0x1E<<7 | 0x4F, + 29791 - 19968: jis0208<<14 | 0x3F<<7 | 0x4D, + 29792 - 19968: jis0208<<14 | 0x2D<<7 | 0x3B, + 29794 - 19968: jis0208<<14 | 0x5A<<7 | 0x0F, + 29795 - 19968: jis0208<<14 | 0x3F<<7 | 0x53, + 29796 - 19968: jis0208<<14 | 0x53<<7 | 0x03, + 29798 - 19968: jis0212<<14 | 0x2B<<7 | 0x22, + 29799 - 19968: jis0212<<14 | 0x2B<<7 | 0x23, + 29800 - 19968: jis0212<<14 | 0x2B<<7 | 0x24, + 29801 - 19968: jis0208<<14 | 0x3F<<7 | 0x51, + 29802 - 19968: jis0208<<14 | 0x3F<<7 | 0x54, + 29803 - 19968: jis0212<<14 | 0x2B<<7 | 0x25, + 29805 - 19968: jis0212<<14 | 0x2B<<7 | 0x26, + 29806 - 19968: jis0212<<14 | 0x2B<<7 | 0x27, + 29807 - 19968: jis0208<<14 | 0x3F<<7 | 0x46, + 29808 - 19968: jis0208<<14 | 0x3F<<7 | 0x52, + 29809 - 19968: jis0212<<14 | 0x2B<<7 | 0x28, + 29810 - 19968: jis0212<<14 | 0x2B<<7 | 0x29, + 29811 - 19968: jis0208<<14 | 0x19<<7 | 0x1B, + 29814 - 19968: jis0208<<14 | 0x3F<<7 | 0x55, + 29822 - 19968: jis0208<<14 | 0x3F<<7 | 0x56, + 29824 - 19968: jis0212<<14 | 0x2B<<7 | 0x2A, + 29825 - 19968: jis0212<<14 | 0x2B<<7 | 0x2B, + 29827 - 19968: jis0208<<14 | 0x2C<<7 | 0x5D, + 29829 - 19968: jis0212<<14 | 0x2B<<7 | 0x2C, + 29830 - 19968: jis0212<<14 | 0x2B<<7 | 0x2D, + 29831 - 19968: jis0212<<14 | 0x2B<<7 | 0x2E, + 29833 - 19968: jis0208<<14 | 0x5A<<7 | 0x10, + 29835 - 19968: jis0208<<14 | 0x3F<<7 | 0x57, + 29839 - 19968: jis0212<<14 | 0x2B<<7 | 0x30, + 29840 - 19968: jis0212<<14 | 0x2B<<7 | 0x31, + 29841 - 19968: jis0212<<14 | 0x2B<<7 | 0x32, + 29842 - 19968: jis0212<<14 | 0x2B<<7 | 0x33, + 29848 - 19968: jis0212<<14 | 0x2B<<7 | 0x34, + 29849 - 19968: jis0212<<14 | 0x2B<<7 | 0x35, + 29850 - 19968: jis0212<<14 | 0x2B<<7 | 0x36, + 29852 - 19968: jis0212<<14 | 0x2B<<7 | 0x37, + 29854 - 19968: jis0208<<14 | 0x3F<<7 | 0x58, + 29855 - 19968: jis0208<<14 | 0x5A<<7 | 0x11, + 29856 - 19968: jis0212<<14 | 0x2B<<7 | 0x39, + 29857 - 19968: jis0212<<14 | 0x2B<<7 | 0x3A, + 29858 - 19968: jis0208<<14 | 0x3F<<7 | 0x44, + 29859 - 19968: jis0212<<14 | 0x2B<<7 | 0x3B, + 29862 - 19968: jis0212<<14 | 0x2B<<7 | 0x3C, + 29863 - 19968: jis0208<<14 | 0x3F<<7 | 0x59, + 29864 - 19968: jis0212<<14 | 0x2B<<7 | 0x3D, + 29865 - 19968: jis0212<<14 | 0x2B<<7 | 0x3E, + 29866 - 19968: jis0212<<14 | 0x2B<<7 | 0x3F, + 29867 - 19968: jis0212<<14 | 0x2B<<7 | 0x40, + 29870 - 19968: jis0212<<14 | 0x2B<<7 | 0x41, + 29871 - 19968: jis0212<<14 | 0x2B<<7 | 0x42, + 29872 - 19968: jis0208<<14 | 0x13<<7 | 0x23, + 29873 - 19968: jis0212<<14 | 0x2B<<7 | 0x43, + 29874 - 19968: jis0212<<14 | 0x2B<<7 | 0x44, + 29877 - 19968: jis0212<<14 | 0x2B<<7 | 0x45, + 29881 - 19968: jis0212<<14 | 0x2B<<7 | 0x46, + 29883 - 19968: jis0212<<14 | 0x2B<<7 | 0x47, + 29885 - 19968: jis0208<<14 | 0x1B<<7 | 0x04, + 29887 - 19968: jis0212<<14 | 0x2B<<7 | 0x48, + 29896 - 19968: jis0212<<14 | 0x2B<<7 | 0x49, + 29897 - 19968: jis0212<<14 | 0x2B<<7 | 0x4A, + 29898 - 19968: jis0208<<14 | 0x3F<<7 | 0x5A, + 29900 - 19968: jis0212<<14 | 0x2B<<7 | 0x4B, + 29903 - 19968: jis0208<<14 | 0x3F<<7 | 0x5B, + 29904 - 19968: jis0212<<14 | 0x2B<<7 | 0x4C, + 29907 - 19968: jis0212<<14 | 0x2B<<7 | 0x4D, + 29908 - 19968: jis0208<<14 | 0x3F<<7 | 0x5C, + 29912 - 19968: jis0212<<14 | 0x2B<<7 | 0x4E, + 29914 - 19968: jis0212<<14 | 0x2B<<7 | 0x4F, + 29915 - 19968: jis0212<<14 | 0x2B<<7 | 0x50, + 29916 - 19968: jis0208<<14 | 0x10<<7 | 0x1A, + 29918 - 19968: jis0212<<14 | 0x2B<<7 | 0x51, + 29919 - 19968: jis0212<<14 | 0x2B<<7 | 0x52, + 29920 - 19968: jis0208<<14 | 0x40<<7 | 0x00, + 29922 - 19968: jis0208<<14 | 0x28<<7 | 0x1A, + 29923 - 19968: jis0208<<14 | 0x40<<7 | 0x01, + 29924 - 19968: jis0212<<14 | 0x2B<<7 | 0x53, + 29926 - 19968: jis0208<<14 | 0x13<<7 | 0x03, + 29927 - 19968: jis0208<<14 | 0x40<<7 | 0x02, + 29928 - 19968: jis0212<<14 | 0x2B<<7 | 0x54, + 29929 - 19968: jis0208<<14 | 0x40<<7 | 0x03, + 29930 - 19968: jis0212<<14 | 0x2B<<7 | 0x55, + 29931 - 19968: jis0212<<14 | 0x2B<<7 | 0x56, + 29934 - 19968: jis0208<<14 | 0x40<<7 | 0x04, + 29935 - 19968: jis0212<<14 | 0x2B<<7 | 0x57, + 29936 - 19968: jis0208<<14 | 0x40<<7 | 0x06, + 29937 - 19968: jis0208<<14 | 0x40<<7 | 0x07, + 29938 - 19968: jis0208<<14 | 0x40<<7 | 0x05, + 29940 - 19968: jis0212<<14 | 0x2B<<7 | 0x58, + 29942 - 19968: jis0208<<14 | 0x28<<7 | 0x32, + 29943 - 19968: jis0208<<14 | 0x40<<7 | 0x09, + 29944 - 19968: jis0208<<14 | 0x40<<7 | 0x08, + 29946 - 19968: jis0212<<14 | 0x2B<<7 | 0x59, + 29947 - 19968: jis0212<<14 | 0x2B<<7 | 0x5A, + 29948 - 19968: jis0212<<14 | 0x2B<<7 | 0x5B, + 29951 - 19968: jis0212<<14 | 0x2B<<7 | 0x5C, + 29953 - 19968: jis0208<<14 | 0x5A<<7 | 0x12, + 29955 - 19968: jis0208<<14 | 0x40<<7 | 0x0B, + 29956 - 19968: jis0208<<14 | 0x40<<7 | 0x0A, + 29957 - 19968: jis0208<<14 | 0x40<<7 | 0x0C, + 29958 - 19968: jis0212<<14 | 0x2B<<7 | 0x5D, + 29964 - 19968: jis0208<<14 | 0x40<<7 | 0x0D, + 29965 - 19968: jis0208<<14 | 0x40<<7 | 0x0F, + 29966 - 19968: jis0208<<14 | 0x40<<7 | 0x0E, + 29969 - 19968: jis0208<<14 | 0x18<<7 | 0x58, + 29970 - 19968: jis0212<<14 | 0x2C<<7 | 0x00, + 29971 - 19968: jis0208<<14 | 0x40<<7 | 0x11, + 29973 - 19968: jis0208<<14 | 0x40<<7 | 0x10, + 29974 - 19968: jis0212<<14 | 0x2C<<7 | 0x01, + 29975 - 19968: jis0212<<14 | 0x2C<<7 | 0x02, + 29976 - 19968: jis0208<<14 | 0x13<<7 | 0x24, + 29978 - 19968: jis0208<<14 | 0x1E<<7 | 0x32, + 29980 - 19968: jis0208<<14 | 0x24<<7 | 0x1B, + 29982 - 19968: jis0208<<14 | 0x40<<7 | 0x12, + 29983 - 19968: jis0208<<14 | 0x1F<<7 | 0x17, + 29984 - 19968: jis0212<<14 | 0x2C<<7 | 0x03, + 29985 - 19968: jis0212<<14 | 0x2C<<7 | 0x04, + 29987 - 19968: jis0208<<14 | 0x1A<<7 | 0x19, + 29988 - 19968: jis0212<<14 | 0x2C<<7 | 0x05, + 29989 - 19968: jis0208<<14 | 0x10<<7 | 0x58, + 29990 - 19968: jis0208<<14 | 0x40<<7 | 0x13, + 29991 - 19968: jis0212<<14 | 0x2C<<7 | 0x06, + 29992 - 19968: jis0208<<14 | 0x2C<<7 | 0x30, + 29993 - 19968: jis0212<<14 | 0x2C<<7 | 0x07, + 29994 - 19968: jis0212<<14 | 0x2C<<7 | 0x08, + 29995 - 19968: jis0208<<14 | 0x29<<7 | 0x42, + 29996 - 19968: jis0208<<14 | 0x40<<7 | 0x14, + 29999 - 19968: jis0208<<14 | 0x58<<7 | 0x4B, + 30000 - 19968: jis0208<<14 | 0x24<<7 | 0x23, + 30001 - 19968: jis0208<<14 | 0x2C<<7 | 0x12, + 30002 - 19968: jis0208<<14 | 0x18<<7 | 0x22, + 30003 - 19968: jis0208<<14 | 0x1E<<7 | 0x1C, + 30006 - 19968: jis0212<<14 | 0x2C<<7 | 0x0A, + 30007 - 19968: jis0208<<14 | 0x22<<7 | 0x2A, + 30008 - 19968: jis0208<<14 | 0x31<<7 | 0x13, + 30009 - 19968: jis0212<<14 | 0x2C<<7 | 0x0B, + 30010 - 19968: jis0208<<14 | 0x23<<7 | 0x0D, + 30011 - 19968: jis0208<<14 | 0x11<<7 | 0x47, + 30012 - 19968: jis0208<<14 | 0x40<<7 | 0x15, + 30013 - 19968: jis0212<<14 | 0x2C<<7 | 0x0C, + 30014 - 19968: jis0212<<14 | 0x2C<<7 | 0x0D, + 30015 - 19968: jis0212<<14 | 0x2C<<7 | 0x0E, + 30016 - 19968: jis0212<<14 | 0x2C<<7 | 0x0F, + 30019 - 19968: jis0212<<14 | 0x2C<<7 | 0x10, + 30020 - 19968: jis0208<<14 | 0x40<<7 | 0x16, + 30022 - 19968: jis0208<<14 | 0x40<<7 | 0x1B, + 30023 - 19968: jis0212<<14 | 0x2C<<7 | 0x11, + 30024 - 19968: jis0212<<14 | 0x2C<<7 | 0x12, + 30025 - 19968: jis0208<<14 | 0x40<<7 | 0x19, + 30026 - 19968: jis0208<<14 | 0x40<<7 | 0x18, + 30027 - 19968: jis0208<<14 | 0x39<<7 | 0x21, + 30028 - 19968: jis0208<<14 | 0x12<<7 | 0x05, + 30029 - 19968: jis0208<<14 | 0x40<<7 | 0x17, + 30030 - 19968: jis0212<<14 | 0x2C<<7 | 0x13, + 30031 - 19968: jis0208<<14 | 0x0F<<7 | 0x39, + 30032 - 19968: jis0212<<14 | 0x2C<<7 | 0x14, + 30033 - 19968: jis0208<<14 | 0x27<<7 | 0x09, + 30034 - 19968: jis0212<<14 | 0x2C<<7 | 0x15, + 30036 - 19968: jis0208<<14 | 0x27<<7 | 0x29, + 30039 - 19968: jis0212<<14 | 0x2C<<7 | 0x16, + 30041 - 19968: jis0208<<14 | 0x2D<<7 | 0x10, + 30042 - 19968: jis0208<<14 | 0x40<<7 | 0x1C, + 30043 - 19968: jis0208<<14 | 0x40<<7 | 0x1A, + 30044 - 19968: jis0208<<14 | 0x22<<7 | 0x3B, + 30045 - 19968: jis0208<<14 | 0x1F<<7 | 0x05, + 30046 - 19968: jis0212<<14 | 0x2C<<7 | 0x17, + 30047 - 19968: jis0212<<14 | 0x2C<<7 | 0x18, + 30048 - 19968: jis0208<<14 | 0x27<<7 | 0x0A, + 30049 - 19968: jis0212<<14 | 0x2C<<7 | 0x19, + 30050 - 19968: jis0208<<14 | 0x28<<7 | 0x0C, + 30052 - 19968: jis0208<<14 | 0x40<<7 | 0x1E, + 30053 - 19968: jis0208<<14 | 0x2D<<7 | 0x0B, + 30054 - 19968: jis0208<<14 | 0x16<<7 | 0x2C, + 30055 - 19968: jis0208<<14 | 0x40<<7 | 0x1F, + 30057 - 19968: jis0208<<14 | 0x40<<7 | 0x1D, + 30058 - 19968: jis0208<<14 | 0x27<<7 | 0x35, + 30059 - 19968: jis0208<<14 | 0x40<<7 | 0x20, + 30061 - 19968: jis0208<<14 | 0x40<<7 | 0x21, + 30063 - 19968: jis0208<<14 | 0x5A<<7 | 0x13, + 30064 - 19968: jis0208<<14 | 0x0F<<7 | 0x3A, + 30065 - 19968: jis0212<<14 | 0x2C<<7 | 0x1B, + 30067 - 19968: jis0208<<14 | 0x1D<<7 | 0x55, + 30068 - 19968: jis0208<<14 | 0x40<<7 | 0x26, + 30070 - 19968: jis0208<<14 | 0x40<<7 | 0x23, + 30071 - 19968: jis0208<<14 | 0x25<<7 | 0x4C, + 30072 - 19968: jis0208<<14 | 0x40<<7 | 0x22, + 30073 - 19968: jis0212<<14 | 0x2C<<7 | 0x1C, + 30074 - 19968: jis0212<<14 | 0x2C<<7 | 0x1D, + 30075 - 19968: jis0212<<14 | 0x2C<<7 | 0x1E, + 30076 - 19968: jis0212<<14 | 0x2C<<7 | 0x1F, + 30077 - 19968: jis0212<<14 | 0x2C<<7 | 0x20, + 30078 - 19968: jis0212<<14 | 0x2C<<7 | 0x21, + 30079 - 19968: jis0208<<14 | 0x14<<7 | 0x05, + 30081 - 19968: jis0212<<14 | 0x2C<<7 | 0x22, + 30082 - 19968: jis0208<<14 | 0x40<<7 | 0x29, + 30085 - 19968: jis0212<<14 | 0x2C<<7 | 0x23, + 30086 - 19968: jis0208<<14 | 0x40<<7 | 0x24, + 30087 - 19968: jis0208<<14 | 0x40<<7 | 0x25, + 30089 - 19968: jis0208<<14 | 0x40<<7 | 0x28, + 30090 - 19968: jis0208<<14 | 0x40<<7 | 0x27, + 30091 - 19968: jis0208<<14 | 0x28<<7 | 0x04, + 30094 - 19968: jis0208<<14 | 0x20<<7 | 0x21, + 30095 - 19968: jis0208<<14 | 0x20<<7 | 0x20, + 30096 - 19968: jis0212<<14 | 0x2C<<7 | 0x24, + 30097 - 19968: jis0208<<14 | 0x14<<7 | 0x1E, + 30098 - 19968: jis0212<<14 | 0x2C<<7 | 0x25, + 30099 - 19968: jis0212<<14 | 0x2C<<7 | 0x26, + 30100 - 19968: jis0208<<14 | 0x40<<7 | 0x2A, + 30101 - 19968: jis0212<<14 | 0x2C<<7 | 0x27, + 30105 - 19968: jis0212<<14 | 0x2C<<7 | 0x28, + 30106 - 19968: jis0208<<14 | 0x40<<7 | 0x2B, + 30108 - 19968: jis0212<<14 | 0x2C<<7 | 0x29, + 30109 - 19968: jis0208<<14 | 0x40<<7 | 0x2C, + 30114 - 19968: jis0212<<14 | 0x2C<<7 | 0x2A, + 30115 - 19968: jis0208<<14 | 0x40<<7 | 0x2E, + 30116 - 19968: jis0212<<14 | 0x2C<<7 | 0x2B, + 30117 - 19968: jis0208<<14 | 0x40<<7 | 0x2D, + 30123 - 19968: jis0208<<14 | 0x10<<7 | 0x35, + 30129 - 19968: jis0208<<14 | 0x40<<7 | 0x36, + 30130 - 19968: jis0208<<14 | 0x27<<7 | 0x47, + 30131 - 19968: jis0208<<14 | 0x40<<7 | 0x30, + 30132 - 19968: jis0212<<14 | 0x2C<<7 | 0x2C, + 30133 - 19968: jis0208<<14 | 0x40<<7 | 0x32, + 30136 - 19968: jis0208<<14 | 0x40<<7 | 0x34, + 30137 - 19968: jis0208<<14 | 0x1E<<7 | 0x1D, + 30138 - 19968: jis0212<<14 | 0x2C<<7 | 0x2D, + 30140 - 19968: jis0208<<14 | 0x40<<7 | 0x35, + 30141 - 19968: jis0208<<14 | 0x40<<7 | 0x33, + 30142 - 19968: jis0208<<14 | 0x1B<<7 | 0x1F, + 30143 - 19968: jis0212<<14 | 0x2C<<7 | 0x2E, + 30144 - 19968: jis0212<<14 | 0x2C<<7 | 0x2F, + 30145 - 19968: jis0212<<14 | 0x2C<<7 | 0x30, + 30146 - 19968: jis0208<<14 | 0x40<<7 | 0x2F, + 30147 - 19968: jis0208<<14 | 0x40<<7 | 0x31, + 30148 - 19968: jis0212<<14 | 0x2C<<7 | 0x31, + 30149 - 19968: jis0208<<14 | 0x28<<7 | 0x21, + 30150 - 19968: jis0212<<14 | 0x2C<<7 | 0x32, + 30151 - 19968: jis0208<<14 | 0x1D<<7 | 0x28, + 30154 - 19968: jis0208<<14 | 0x40<<7 | 0x38, + 30156 - 19968: jis0212<<14 | 0x2C<<7 | 0x33, + 30157 - 19968: jis0208<<14 | 0x40<<7 | 0x37, + 30158 - 19968: jis0212<<14 | 0x2C<<7 | 0x34, + 30159 - 19968: jis0212<<14 | 0x2C<<7 | 0x35, + 30162 - 19968: jis0208<<14 | 0x40<<7 | 0x39, + 30164 - 19968: jis0208<<14 | 0x1B<<7 | 0x05, + 30165 - 19968: jis0208<<14 | 0x19<<7 | 0x0E, + 30167 - 19968: jis0212<<14 | 0x2C<<7 | 0x36, + 30168 - 19968: jis0208<<14 | 0x24<<7 | 0x56, + 30169 - 19968: jis0208<<14 | 0x40<<7 | 0x3A, + 30171 - 19968: jis0208<<14 | 0x23<<7 | 0x2A, + 30172 - 19968: jis0212<<14 | 0x2C<<7 | 0x37, + 30174 - 19968: jis0208<<14 | 0x40<<7 | 0x3C, + 30175 - 19968: jis0212<<14 | 0x2C<<7 | 0x38, + 30176 - 19968: jis0212<<14 | 0x2C<<7 | 0x39, + 30177 - 19968: jis0212<<14 | 0x2C<<7 | 0x3A, + 30178 - 19968: jis0208<<14 | 0x2D<<7 | 0x00, + 30179 - 19968: jis0208<<14 | 0x40<<7 | 0x3B, + 30180 - 19968: jis0212<<14 | 0x2C<<7 | 0x3B, + 30183 - 19968: jis0212<<14 | 0x2C<<7 | 0x3C, + 30185 - 19968: jis0208<<14 | 0x20<<7 | 0x48, + 30188 - 19968: jis0212<<14 | 0x2C<<7 | 0x3D, + 30190 - 19968: jis0212<<14 | 0x2C<<7 | 0x3E, + 30191 - 19968: jis0212<<14 | 0x2C<<7 | 0x3F, + 30192 - 19968: jis0208<<14 | 0x40<<7 | 0x41, + 30193 - 19968: jis0212<<14 | 0x2C<<7 | 0x40, + 30194 - 19968: jis0208<<14 | 0x40<<7 | 0x43, + 30195 - 19968: jis0208<<14 | 0x40<<7 | 0x44, + 30196 - 19968: jis0208<<14 | 0x22<<7 | 0x33, + 30201 - 19968: jis0212<<14 | 0x2C<<7 | 0x41, + 30202 - 19968: jis0208<<14 | 0x40<<7 | 0x42, + 30204 - 19968: jis0208<<14 | 0x40<<7 | 0x3F, + 30206 - 19968: jis0208<<14 | 0x40<<7 | 0x3D, + 30207 - 19968: jis0208<<14 | 0x40<<7 | 0x3E, + 30208 - 19968: jis0212<<14 | 0x2C<<7 | 0x42, + 30209 - 19968: jis0208<<14 | 0x40<<7 | 0x40, + 30210 - 19968: jis0212<<14 | 0x2C<<7 | 0x43, + 30211 - 19968: jis0212<<14 | 0x2C<<7 | 0x44, + 30212 - 19968: jis0212<<14 | 0x2C<<7 | 0x45, + 30215 - 19968: jis0212<<14 | 0x2C<<7 | 0x46, + 30216 - 19968: jis0212<<14 | 0x2C<<7 | 0x47, + 30217 - 19968: jis0208<<14 | 0x40<<7 | 0x47, + 30218 - 19968: jis0212<<14 | 0x2C<<7 | 0x48, + 30219 - 19968: jis0208<<14 | 0x40<<7 | 0x45, + 30220 - 19968: jis0212<<14 | 0x2C<<7 | 0x49, + 30221 - 19968: jis0208<<14 | 0x40<<7 | 0x46, + 30223 - 19968: jis0212<<14 | 0x2C<<7 | 0x4A, + 30226 - 19968: jis0212<<14 | 0x2C<<7 | 0x4B, + 30227 - 19968: jis0212<<14 | 0x2C<<7 | 0x4C, + 30229 - 19968: jis0212<<14 | 0x2C<<7 | 0x4D, + 30230 - 19968: jis0212<<14 | 0x2C<<7 | 0x4E, + 30233 - 19968: jis0212<<14 | 0x2C<<7 | 0x4F, + 30235 - 19968: jis0212<<14 | 0x2C<<7 | 0x50, + 30236 - 19968: jis0212<<14 | 0x2C<<7 | 0x51, + 30237 - 19968: jis0212<<14 | 0x2C<<7 | 0x52, + 30238 - 19968: jis0212<<14 | 0x2C<<7 | 0x53, + 30239 - 19968: jis0208<<14 | 0x40<<7 | 0x48, + 30240 - 19968: jis0208<<14 | 0x40<<7 | 0x4A, + 30241 - 19968: jis0208<<14 | 0x40<<7 | 0x4B, + 30242 - 19968: jis0208<<14 | 0x40<<7 | 0x4C, + 30243 - 19968: jis0212<<14 | 0x2C<<7 | 0x54, + 30244 - 19968: jis0208<<14 | 0x40<<7 | 0x4D, + 30245 - 19968: jis0212<<14 | 0x2C<<7 | 0x55, + 30246 - 19968: jis0212<<14 | 0x2C<<7 | 0x56, + 30247 - 19968: jis0208<<14 | 0x40<<7 | 0x49, + 30249 - 19968: jis0212<<14 | 0x2C<<7 | 0x57, + 30253 - 19968: jis0212<<14 | 0x2C<<7 | 0x58, + 30256 - 19968: jis0208<<14 | 0x40<<7 | 0x4F, + 30258 - 19968: jis0212<<14 | 0x2C<<7 | 0x59, + 30259 - 19968: jis0212<<14 | 0x2C<<7 | 0x5A, + 30260 - 19968: jis0208<<14 | 0x40<<7 | 0x4E, + 30261 - 19968: jis0212<<14 | 0x2C<<7 | 0x5B, + 30264 - 19968: jis0212<<14 | 0x2C<<7 | 0x5C, + 30265 - 19968: jis0212<<14 | 0x2C<<7 | 0x5D, + 30266 - 19968: jis0212<<14 | 0x2D<<7 | 0x00, + 30267 - 19968: jis0208<<14 | 0x40<<7 | 0x50, + 30268 - 19968: jis0212<<14 | 0x2D<<7 | 0x01, + 30272 - 19968: jis0212<<14 | 0x2D<<7 | 0x03, + 30273 - 19968: jis0212<<14 | 0x2D<<7 | 0x04, + 30274 - 19968: jis0208<<14 | 0x2D<<7 | 0x24, + 30275 - 19968: jis0212<<14 | 0x2D<<7 | 0x05, + 30276 - 19968: jis0212<<14 | 0x2D<<7 | 0x06, + 30277 - 19968: jis0212<<14 | 0x2D<<7 | 0x07, + 30278 - 19968: jis0208<<14 | 0x40<<7 | 0x53, + 30279 - 19968: jis0208<<14 | 0x40<<7 | 0x51, + 30280 - 19968: jis0208<<14 | 0x40<<7 | 0x52, + 30281 - 19968: jis0212<<14 | 0x2D<<7 | 0x08, + 30282 - 19968: jis0212<<14 | 0x2D<<7 | 0x02, + 30283 - 19968: jis0212<<14 | 0x2D<<7 | 0x09, + 30284 - 19968: jis0208<<14 | 0x13<<7 | 0x41, + 30290 - 19968: jis0208<<14 | 0x2B<<7 | 0x5D, + 30293 - 19968: jis0212<<14 | 0x2D<<7 | 0x0A, + 30294 - 19968: jis0208<<14 | 0x29<<7 | 0x29, + 30296 - 19968: jis0208<<14 | 0x40<<7 | 0x55, + 30297 - 19968: jis0212<<14 | 0x2D<<7 | 0x0B, + 30300 - 19968: jis0208<<14 | 0x40<<7 | 0x54, + 30303 - 19968: jis0212<<14 | 0x2D<<7 | 0x0C, + 30305 - 19968: jis0208<<14 | 0x40<<7 | 0x56, + 30306 - 19968: jis0208<<14 | 0x40<<7 | 0x57, + 30308 - 19968: jis0212<<14 | 0x2D<<7 | 0x0D, + 30309 - 19968: jis0212<<14 | 0x2D<<7 | 0x0E, + 30311 - 19968: jis0208<<14 | 0x40<<7 | 0x5B, + 30312 - 19968: jis0208<<14 | 0x40<<7 | 0x58, + 30313 - 19968: jis0208<<14 | 0x40<<7 | 0x59, + 30314 - 19968: jis0208<<14 | 0x40<<7 | 0x5A, + 30316 - 19968: jis0208<<14 | 0x40<<7 | 0x5C, + 30317 - 19968: jis0212<<14 | 0x2D<<7 | 0x0F, + 30318 - 19968: jis0212<<14 | 0x2D<<7 | 0x10, + 30319 - 19968: jis0212<<14 | 0x2D<<7 | 0x11, + 30320 - 19968: jis0208<<14 | 0x40<<7 | 0x5D, + 30321 - 19968: jis0212<<14 | 0x2D<<7 | 0x12, + 30322 - 19968: jis0208<<14 | 0x41<<7 | 0x00, + 30324 - 19968: jis0212<<14 | 0x2D<<7 | 0x13, + 30326 - 19968: jis0208<<14 | 0x41<<7 | 0x01, + 30328 - 19968: jis0208<<14 | 0x41<<7 | 0x02, + 30330 - 19968: jis0208<<14 | 0x27<<7 | 0x0E, + 30331 - 19968: jis0208<<14 | 0x24<<7 | 0x2F, + 30332 - 19968: jis0208<<14 | 0x41<<7 | 0x03, + 30333 - 19968: jis0208<<14 | 0x26<<7 | 0x51, + 30334 - 19968: jis0208<<14 | 0x28<<7 | 0x13, + 30336 - 19968: jis0208<<14 | 0x41<<7 | 0x04, + 30337 - 19968: jis0212<<14 | 0x2D<<7 | 0x14, + 30338 - 19968: jis0208<<14 | 0x5A<<7 | 0x14, + 30339 - 19968: jis0208<<14 | 0x41<<7 | 0x05, + 30340 - 19968: jis0208<<14 | 0x24<<7 | 0x09, + 30341 - 19968: jis0212<<14 | 0x2D<<7 | 0x15, + 30342 - 19968: jis0208<<14 | 0x12<<7 | 0x06, + 30343 - 19968: jis0208<<14 | 0x18<<7 | 0x23, + 30344 - 19968: jis0208<<14 | 0x41<<7 | 0x06, + 30347 - 19968: jis0208<<14 | 0x41<<7 | 0x07, + 30348 - 19968: jis0212<<14 | 0x2D<<7 | 0x16, + 30349 - 19968: jis0212<<14 | 0x2D<<7 | 0x17, + 30350 - 19968: jis0208<<14 | 0x41<<7 | 0x08, + 30352 - 19968: jis0208<<14 | 0x1A<<7 | 0x08, + 30355 - 19968: jis0208<<14 | 0x41<<7 | 0x0A, + 30357 - 19968: jis0212<<14 | 0x2D<<7 | 0x18, + 30358 - 19968: jis0208<<14 | 0x41<<7 | 0x09, + 30361 - 19968: jis0208<<14 | 0x41<<7 | 0x0B, + 30362 - 19968: jis0208<<14 | 0x41<<7 | 0x0C, + 30363 - 19968: jis0208<<14 | 0x5A<<7 | 0x17, + 30364 - 19968: jis0208<<14 | 0x5A<<7 | 0x15, + 30365 - 19968: jis0212<<14 | 0x2D<<7 | 0x1B, + 30366 - 19968: jis0208<<14 | 0x5A<<7 | 0x16, + 30367 - 19968: jis0212<<14 | 0x2D<<7 | 0x1C, + 30368 - 19968: jis0212<<14 | 0x2D<<7 | 0x1D, + 30370 - 19968: jis0212<<14 | 0x2D<<7 | 0x1E, + 30371 - 19968: jis0212<<14 | 0x2D<<7 | 0x1F, + 30372 - 19968: jis0212<<14 | 0x2D<<7 | 0x20, + 30373 - 19968: jis0212<<14 | 0x2D<<7 | 0x21, + 30374 - 19968: jis0208<<14 | 0x5A<<7 | 0x18, + 30375 - 19968: jis0212<<14 | 0x2D<<7 | 0x23, + 30376 - 19968: jis0212<<14 | 0x2D<<7 | 0x24, + 30378 - 19968: jis0212<<14 | 0x2D<<7 | 0x25, + 30381 - 19968: jis0212<<14 | 0x2D<<7 | 0x26, + 30382 - 19968: jis0208<<14 | 0x27<<7 | 0x48, + 30384 - 19968: jis0208<<14 | 0x41<<7 | 0x0D, + 30388 - 19968: jis0208<<14 | 0x41<<7 | 0x0E, + 30391 - 19968: jis0208<<14 | 0x52<<7 | 0x48, + 30392 - 19968: jis0208<<14 | 0x41<<7 | 0x0F, + 30393 - 19968: jis0208<<14 | 0x41<<7 | 0x10, + 30394 - 19968: jis0208<<14 | 0x41<<7 | 0x11, + 30397 - 19968: jis0212<<14 | 0x2D<<7 | 0x27, + 30399 - 19968: jis0208<<14 | 0x1A<<7 | 0x0D, + 30401 - 19968: jis0212<<14 | 0x2D<<7 | 0x28, + 30402 - 19968: jis0208<<14 | 0x41<<7 | 0x12, + 30403 - 19968: jis0208<<14 | 0x26<<7 | 0x35, + 30405 - 19968: jis0212<<14 | 0x2D<<7 | 0x29, + 30406 - 19968: jis0208<<14 | 0x2A<<7 | 0x3E, + 30408 - 19968: jis0208<<14 | 0x10<<7 | 0x2D, + 30409 - 19968: jis0212<<14 | 0x2D<<7 | 0x2A, + 30410 - 19968: jis0208<<14 | 0x10<<7 | 0x36, + 30411 - 19968: jis0212<<14 | 0x2D<<7 | 0x2B, + 30412 - 19968: jis0212<<14 | 0x2D<<7 | 0x2C, + 30413 - 19968: jis0208<<14 | 0x41<<7 | 0x13, + 30414 - 19968: jis0212<<14 | 0x2D<<7 | 0x2D, + 30418 - 19968: jis0208<<14 | 0x41<<7 | 0x15, + 30420 - 19968: jis0212<<14 | 0x2D<<7 | 0x2E, + 30422 - 19968: jis0208<<14 | 0x41<<7 | 0x14, + 30423 - 19968: jis0208<<14 | 0x24<<7 | 0x4F, + 30425 - 19968: jis0212<<14 | 0x2D<<7 | 0x2F, + 30427 - 19968: jis0208<<14 | 0x1F<<7 | 0x18, + 30428 - 19968: jis0208<<14 | 0x3C<<7 | 0x18, + 30430 - 19968: jis0208<<14 | 0x41<<7 | 0x16, + 30431 - 19968: jis0208<<14 | 0x2B<<7 | 0x20, + 30432 - 19968: jis0212<<14 | 0x2D<<7 | 0x30, + 30433 - 19968: jis0208<<14 | 0x41<<7 | 0x17, + 30435 - 19968: jis0208<<14 | 0x13<<7 | 0x25, + 30436 - 19968: jis0208<<14 | 0x27<<7 | 0x36, + 30437 - 19968: jis0208<<14 | 0x41<<7 | 0x18, + 30438 - 19968: jis0212<<14 | 0x2D<<7 | 0x31, + 30439 - 19968: jis0208<<14 | 0x41<<7 | 0x19, + 30440 - 19968: jis0212<<14 | 0x2D<<7 | 0x32, + 30442 - 19968: jis0208<<14 | 0x41<<7 | 0x1A, + 30444 - 19968: jis0212<<14 | 0x2D<<7 | 0x33, + 30446 - 19968: jis0208<<14 | 0x2B<<7 | 0x3B, + 30448 - 19968: jis0212<<14 | 0x2D<<7 | 0x34, + 30449 - 19968: jis0212<<14 | 0x2D<<7 | 0x35, + 30450 - 19968: jis0208<<14 | 0x2B<<7 | 0x34, + 30452 - 19968: jis0208<<14 | 0x23<<7 | 0x1D, + 30454 - 19968: jis0212<<14 | 0x2D<<7 | 0x36, + 30456 - 19968: jis0208<<14 | 0x20<<7 | 0x49, + 30457 - 19968: jis0212<<14 | 0x2D<<7 | 0x37, + 30459 - 19968: jis0208<<14 | 0x41<<7 | 0x1C, + 30460 - 19968: jis0212<<14 | 0x2D<<7 | 0x38, + 30462 - 19968: jis0208<<14 | 0x1C<<7 | 0x41, + 30464 - 19968: jis0212<<14 | 0x2D<<7 | 0x39, + 30465 - 19968: jis0208<<14 | 0x1D<<7 | 0x29, + 30468 - 19968: jis0208<<14 | 0x41<<7 | 0x1F, + 30470 - 19968: jis0212<<14 | 0x2D<<7 | 0x3A, + 30471 - 19968: jis0208<<14 | 0x41<<7 | 0x1E, + 30472 - 19968: jis0208<<14 | 0x41<<7 | 0x1D, + 30473 - 19968: jis0208<<14 | 0x27<<7 | 0x5C, + 30474 - 19968: jis0212<<14 | 0x2D<<7 | 0x3B, + 30475 - 19968: jis0208<<14 | 0x13<<7 | 0x26, + 30476 - 19968: jis0208<<14 | 0x17<<7 | 0x08, + 30478 - 19968: jis0212<<14 | 0x2D<<7 | 0x3C, + 30482 - 19968: jis0212<<14 | 0x2D<<7 | 0x3D, + 30484 - 19968: jis0212<<14 | 0x2D<<7 | 0x3E, + 30485 - 19968: jis0212<<14 | 0x2D<<7 | 0x3F, + 30487 - 19968: jis0212<<14 | 0x2D<<7 | 0x40, + 30489 - 19968: jis0212<<14 | 0x2D<<7 | 0x41, + 30490 - 19968: jis0212<<14 | 0x2D<<7 | 0x42, + 30491 - 19968: jis0208<<14 | 0x41<<7 | 0x25, + 30492 - 19968: jis0212<<14 | 0x2D<<7 | 0x43, + 30494 - 19968: jis0208<<14 | 0x41<<7 | 0x22, + 30495 - 19968: jis0208<<14 | 0x1E<<7 | 0x1E, + 30496 - 19968: jis0208<<14 | 0x2B<<7 | 0x11, + 30498 - 19968: jis0212<<14 | 0x2D<<7 | 0x44, + 30500 - 19968: jis0208<<14 | 0x41<<7 | 0x21, + 30501 - 19968: jis0208<<14 | 0x41<<7 | 0x23, + 30502 - 19968: jis0208<<14 | 0x41<<7 | 0x24, + 30504 - 19968: jis0212<<14 | 0x2D<<7 | 0x45, + 30505 - 19968: jis0208<<14 | 0x41<<7 | 0x20, + 30509 - 19968: jis0212<<14 | 0x2D<<7 | 0x46, + 30510 - 19968: jis0212<<14 | 0x2D<<7 | 0x47, + 30511 - 19968: jis0212<<14 | 0x2D<<7 | 0x48, + 30516 - 19968: jis0212<<14 | 0x2D<<7 | 0x49, + 30517 - 19968: jis0212<<14 | 0x2D<<7 | 0x4A, + 30518 - 19968: jis0212<<14 | 0x2D<<7 | 0x4B, + 30519 - 19968: jis0208<<14 | 0x41<<7 | 0x26, + 30520 - 19968: jis0208<<14 | 0x41<<7 | 0x27, + 30521 - 19968: jis0212<<14 | 0x2D<<7 | 0x4C, + 30522 - 19968: jis0208<<14 | 0x23<<7 | 0x0E, + 30524 - 19968: jis0208<<14 | 0x13<<7 | 0x42, + 30525 - 19968: jis0212<<14 | 0x2D<<7 | 0x4D, + 30526 - 19968: jis0212<<14 | 0x2D<<7 | 0x4E, + 30528 - 19968: jis0208<<14 | 0x22<<7 | 0x44, + 30530 - 19968: jis0212<<14 | 0x2D<<7 | 0x4F, + 30533 - 19968: jis0212<<14 | 0x2D<<7 | 0x50, + 30534 - 19968: jis0208<<14 | 0x5A<<7 | 0x1A, + 30535 - 19968: jis0208<<14 | 0x41<<7 | 0x28, + 30538 - 19968: jis0212<<14 | 0x2D<<7 | 0x52, + 30541 - 19968: jis0212<<14 | 0x2D<<7 | 0x53, + 30542 - 19968: jis0212<<14 | 0x2D<<7 | 0x54, + 30543 - 19968: jis0212<<14 | 0x2D<<7 | 0x55, + 30546 - 19968: jis0212<<14 | 0x2D<<7 | 0x56, + 30550 - 19968: jis0212<<14 | 0x2D<<7 | 0x57, + 30551 - 19968: jis0212<<14 | 0x2D<<7 | 0x58, + 30554 - 19968: jis0208<<14 | 0x41<<7 | 0x29, + 30555 - 19968: jis0208<<14 | 0x41<<7 | 0x2C, + 30556 - 19968: jis0212<<14 | 0x2D<<7 | 0x59, + 30558 - 19968: jis0212<<14 | 0x2D<<7 | 0x5A, + 30559 - 19968: jis0212<<14 | 0x2D<<7 | 0x5B, + 30560 - 19968: jis0212<<14 | 0x2D<<7 | 0x5C, + 30561 - 19968: jis0208<<14 | 0x1E<<7 | 0x46, + 30562 - 19968: jis0212<<14 | 0x2D<<7 | 0x5D, + 30563 - 19968: jis0208<<14 | 0x25<<7 | 0x23, + 30564 - 19968: jis0212<<14 | 0x2E<<7 | 0x00, + 30565 - 19968: jis0208<<14 | 0x41<<7 | 0x2D, + 30566 - 19968: jis0208<<14 | 0x2A<<7 | 0x32, + 30567 - 19968: jis0212<<14 | 0x2E<<7 | 0x01, + 30568 - 19968: jis0208<<14 | 0x41<<7 | 0x2A, + 30570 - 19968: jis0212<<14 | 0x2E<<7 | 0x02, + 30571 - 19968: jis0208<<14 | 0x41<<7 | 0x2B, + 30572 - 19968: jis0212<<14 | 0x2E<<7 | 0x03, + 30576 - 19968: jis0212<<14 | 0x2E<<7 | 0x04, + 30578 - 19968: jis0212<<14 | 0x2E<<7 | 0x05, + 30579 - 19968: jis0212<<14 | 0x2E<<7 | 0x06, + 30580 - 19968: jis0212<<14 | 0x2E<<7 | 0x07, + 30585 - 19968: jis0208<<14 | 0x41<<7 | 0x30, + 30586 - 19968: jis0212<<14 | 0x2E<<7 | 0x08, + 30589 - 19968: jis0212<<14 | 0x2E<<7 | 0x09, + 30590 - 19968: jis0208<<14 | 0x41<<7 | 0x2F, + 30591 - 19968: jis0208<<14 | 0x41<<7 | 0x2E, + 30592 - 19968: jis0212<<14 | 0x2E<<7 | 0x0A, + 30596 - 19968: jis0212<<14 | 0x2E<<7 | 0x0B, + 30603 - 19968: jis0208<<14 | 0x41<<7 | 0x32, + 30604 - 19968: jis0212<<14 | 0x2E<<7 | 0x0C, + 30605 - 19968: jis0212<<14 | 0x2E<<7 | 0x0D, + 30606 - 19968: jis0208<<14 | 0x41<<7 | 0x31, + 30609 - 19968: jis0208<<14 | 0x41<<7 | 0x33, + 30612 - 19968: jis0212<<14 | 0x2E<<7 | 0x0E, + 30613 - 19968: jis0212<<14 | 0x2E<<7 | 0x0F, + 30614 - 19968: jis0212<<14 | 0x2E<<7 | 0x10, + 30618 - 19968: jis0212<<14 | 0x2E<<7 | 0x11, + 30622 - 19968: jis0208<<14 | 0x41<<7 | 0x35, + 30623 - 19968: jis0212<<14 | 0x2E<<7 | 0x12, + 30624 - 19968: jis0208<<14 | 0x41<<7 | 0x34, + 30626 - 19968: jis0212<<14 | 0x2E<<7 | 0x13, + 30629 - 19968: jis0208<<14 | 0x29<<7 | 0x2C, + 30631 - 19968: jis0212<<14 | 0x2E<<7 | 0x14, + 30634 - 19968: jis0212<<14 | 0x2E<<7 | 0x15, + 30636 - 19968: jis0208<<14 | 0x1C<<7 | 0x35, + 30637 - 19968: jis0208<<14 | 0x2D<<7 | 0x25, + 30638 - 19968: jis0212<<14 | 0x2E<<7 | 0x16, + 30639 - 19968: jis0212<<14 | 0x2E<<7 | 0x17, + 30640 - 19968: jis0208<<14 | 0x41<<7 | 0x36, + 30641 - 19968: jis0212<<14 | 0x2E<<7 | 0x18, + 30643 - 19968: jis0208<<14 | 0x25<<7 | 0x16, + 30645 - 19968: jis0212<<14 | 0x2E<<7 | 0x19, + 30646 - 19968: jis0208<<14 | 0x41<<7 | 0x37, + 30649 - 19968: jis0208<<14 | 0x41<<7 | 0x38, + 30651 - 19968: jis0208<<14 | 0x41<<7 | 0x3C, + 30652 - 19968: jis0208<<14 | 0x41<<7 | 0x3A, + 30653 - 19968: jis0208<<14 | 0x41<<7 | 0x3B, + 30654 - 19968: jis0212<<14 | 0x2E<<7 | 0x1A, + 30655 - 19968: jis0208<<14 | 0x41<<7 | 0x39, + 30659 - 19968: jis0212<<14 | 0x2E<<7 | 0x1B, + 30663 - 19968: jis0208<<14 | 0x41<<7 | 0x3D, + 30665 - 19968: jis0212<<14 | 0x2E<<7 | 0x1C, + 30669 - 19968: jis0208<<14 | 0x41<<7 | 0x3E, + 30673 - 19968: jis0212<<14 | 0x2E<<7 | 0x1D, + 30674 - 19968: jis0212<<14 | 0x2E<<7 | 0x1E, + 30677 - 19968: jis0212<<14 | 0x2E<<7 | 0x1F, + 30679 - 19968: jis0208<<14 | 0x41<<7 | 0x3F, + 30681 - 19968: jis0212<<14 | 0x2E<<7 | 0x20, + 30682 - 19968: jis0208<<14 | 0x41<<7 | 0x40, + 30683 - 19968: jis0208<<14 | 0x2B<<7 | 0x16, + 30684 - 19968: jis0208<<14 | 0x41<<7 | 0x41, + 30686 - 19968: jis0212<<14 | 0x2E<<7 | 0x21, + 30687 - 19968: jis0212<<14 | 0x2E<<7 | 0x22, + 30688 - 19968: jis0212<<14 | 0x2E<<7 | 0x23, + 30690 - 19968: jis0208<<14 | 0x2B<<7 | 0x4F, + 30691 - 19968: jis0208<<14 | 0x41<<7 | 0x42, + 30692 - 19968: jis0212<<14 | 0x2E<<7 | 0x24, + 30693 - 19968: jis0208<<14 | 0x22<<7 | 0x2D, + 30694 - 19968: jis0212<<14 | 0x2E<<7 | 0x25, + 30695 - 19968: jis0208<<14 | 0x26<<7 | 0x49, + 30697 - 19968: jis0208<<14 | 0x15<<7 | 0x4A, + 30698 - 19968: jis0212<<14 | 0x2E<<7 | 0x26, + 30700 - 19968: jis0212<<14 | 0x2E<<7 | 0x27, + 30701 - 19968: jis0208<<14 | 0x22<<7 | 0x1A, + 30702 - 19968: jis0208<<14 | 0x41<<7 | 0x43, + 30703 - 19968: jis0208<<14 | 0x15<<7 | 0x19, + 30704 - 19968: jis0212<<14 | 0x2E<<7 | 0x28, + 30705 - 19968: jis0212<<14 | 0x2E<<7 | 0x29, + 30707 - 19968: jis0208<<14 | 0x1F<<7 | 0x2F, + 30708 - 19968: jis0212<<14 | 0x2E<<7 | 0x2A, + 30712 - 19968: jis0212<<14 | 0x2E<<7 | 0x2B, + 30715 - 19968: jis0212<<14 | 0x2E<<7 | 0x2C, + 30716 - 19968: jis0208<<14 | 0x41<<7 | 0x44, + 30722 - 19968: jis0208<<14 | 0x19<<7 | 0x1C, + 30725 - 19968: jis0212<<14 | 0x2E<<7 | 0x2D, + 30726 - 19968: jis0212<<14 | 0x2E<<7 | 0x2E, + 30729 - 19968: jis0212<<14 | 0x2E<<7 | 0x2F, + 30732 - 19968: jis0208<<14 | 0x41<<7 | 0x45, + 30733 - 19968: jis0212<<14 | 0x2E<<7 | 0x30, + 30734 - 19968: jis0212<<14 | 0x2E<<7 | 0x31, + 30737 - 19968: jis0212<<14 | 0x2E<<7 | 0x32, + 30738 - 19968: jis0208<<14 | 0x41<<7 | 0x46, + 30740 - 19968: jis0208<<14 | 0x17<<7 | 0x05, + 30741 - 19968: jis0208<<14 | 0x19<<7 | 0x34, + 30749 - 19968: jis0212<<14 | 0x2E<<7 | 0x33, + 30752 - 19968: jis0208<<14 | 0x41<<7 | 0x48, + 30753 - 19968: jis0208<<14 | 0x5A<<7 | 0x1C, + 30754 - 19968: jis0212<<14 | 0x2E<<7 | 0x35, + 30755 - 19968: jis0212<<14 | 0x2E<<7 | 0x36, + 30757 - 19968: jis0208<<14 | 0x24<<7 | 0x35, + 30758 - 19968: jis0208<<14 | 0x19<<7 | 0x35, + 30759 - 19968: jis0208<<14 | 0x14<<7 | 0x2D, + 30765 - 19968: jis0212<<14 | 0x2E<<7 | 0x37, + 30766 - 19968: jis0212<<14 | 0x2E<<7 | 0x38, + 30768 - 19968: jis0212<<14 | 0x2E<<7 | 0x39, + 30770 - 19968: jis0208<<14 | 0x2A<<7 | 0x03, + 30772 - 19968: jis0208<<14 | 0x26<<7 | 0x2A, + 30773 - 19968: jis0212<<14 | 0x2E<<7 | 0x3A, + 30775 - 19968: jis0212<<14 | 0x2E<<7 | 0x3B, + 30778 - 19968: jis0208<<14 | 0x24<<7 | 0x36, + 30783 - 19968: jis0208<<14 | 0x18<<7 | 0x3B, + 30787 - 19968: jis0212<<14 | 0x2E<<7 | 0x3C, + 30788 - 19968: jis0212<<14 | 0x2E<<7 | 0x3D, + 30789 - 19968: jis0208<<14 | 0x41<<7 | 0x4A, + 30791 - 19968: jis0212<<14 | 0x2E<<7 | 0x3E, + 30792 - 19968: jis0212<<14 | 0x2E<<7 | 0x3F, + 30796 - 19968: jis0212<<14 | 0x2E<<7 | 0x40, + 30798 - 19968: jis0208<<14 | 0x5A<<7 | 0x1D, + 30802 - 19968: jis0212<<14 | 0x2E<<7 | 0x42, + 30812 - 19968: jis0212<<14 | 0x2E<<7 | 0x43, + 30813 - 19968: jis0208<<14 | 0x1D<<7 | 0x2A, + 30814 - 19968: jis0212<<14 | 0x2E<<7 | 0x44, + 30816 - 19968: jis0212<<14 | 0x2E<<7 | 0x45, + 30817 - 19968: jis0212<<14 | 0x2E<<7 | 0x46, + 30819 - 19968: jis0212<<14 | 0x2E<<7 | 0x47, + 30820 - 19968: jis0208<<14 | 0x5A<<7 | 0x1E, + 30824 - 19968: jis0212<<14 | 0x2E<<7 | 0x49, + 30826 - 19968: jis0212<<14 | 0x2E<<7 | 0x4A, + 30827 - 19968: jis0208<<14 | 0x2D<<7 | 0x11, + 30828 - 19968: jis0208<<14 | 0x18<<7 | 0x24, + 30830 - 19968: jis0212<<14 | 0x2E<<7 | 0x4B, + 30831 - 19968: jis0208<<14 | 0x17<<7 | 0x06, + 30834 - 19968: jis0208<<14 | 0x27<<7 | 0x02, + 30836 - 19968: jis0208<<14 | 0x41<<7 | 0x4C, + 30842 - 19968: jis0208<<14 | 0x5A<<7 | 0x1F, + 30844 - 19968: jis0208<<14 | 0x41<<7 | 0x4E, + 30846 - 19968: jis0212<<14 | 0x2E<<7 | 0x4D, + 30849 - 19968: jis0208<<14 | 0x17<<7 | 0x4A, + 30854 - 19968: jis0208<<14 | 0x41<<7 | 0x4D, + 30855 - 19968: jis0208<<14 | 0x23<<7 | 0x55, + 30858 - 19968: jis0212<<14 | 0x2E<<7 | 0x4E, + 30860 - 19968: jis0208<<14 | 0x41<<7 | 0x50, + 30861 - 19968: jis0208<<14 | 0x12<<7 | 0x16, + 30862 - 19968: jis0208<<14 | 0x41<<7 | 0x4B, + 30863 - 19968: jis0212<<14 | 0x2E<<7 | 0x4F, + 30865 - 19968: jis0208<<14 | 0x27<<7 | 0x49, + 30867 - 19968: jis0208<<14 | 0x10<<7 | 0x0F, + 30868 - 19968: jis0212<<14 | 0x2E<<7 | 0x50, + 30869 - 19968: jis0208<<14 | 0x19<<7 | 0x4B, + 30871 - 19968: jis0208<<14 | 0x2E<<7 | 0x31, + 30872 - 19968: jis0212<<14 | 0x2E<<7 | 0x51, + 30874 - 19968: jis0208<<14 | 0x41<<7 | 0x4F, + 30877 - 19968: jis0212<<14 | 0x2E<<7 | 0x53, + 30878 - 19968: jis0212<<14 | 0x2E<<7 | 0x54, + 30879 - 19968: jis0212<<14 | 0x2E<<7 | 0x55, + 30881 - 19968: jis0212<<14 | 0x2E<<7 | 0x52, + 30883 - 19968: jis0208<<14 | 0x41<<7 | 0x51, + 30884 - 19968: jis0212<<14 | 0x2E<<7 | 0x56, + 30887 - 19968: jis0208<<14 | 0x29<<7 | 0x2A, + 30888 - 19968: jis0212<<14 | 0x2E<<7 | 0x57, + 30889 - 19968: jis0208<<14 | 0x1F<<7 | 0x38, + 30890 - 19968: jis0208<<14 | 0x41<<7 | 0x53, + 30892 - 19968: jis0212<<14 | 0x2E<<7 | 0x58, + 30893 - 19968: jis0212<<14 | 0x2E<<7 | 0x59, + 30895 - 19968: jis0208<<14 | 0x41<<7 | 0x54, + 30896 - 19968: jis0212<<14 | 0x2E<<7 | 0x5A, + 30897 - 19968: jis0212<<14 | 0x2E<<7 | 0x5B, + 30898 - 19968: jis0212<<14 | 0x2E<<7 | 0x5C, + 30899 - 19968: jis0212<<14 | 0x2E<<7 | 0x5D, + 30901 - 19968: jis0208<<14 | 0x41<<7 | 0x52, + 30906 - 19968: jis0208<<14 | 0x12<<7 | 0x2D, + 30907 - 19968: jis0212<<14 | 0x2F<<7 | 0x00, + 30908 - 19968: jis0208<<14 | 0x41<<7 | 0x5A, + 30909 - 19968: jis0212<<14 | 0x2F<<7 | 0x01, + 30910 - 19968: jis0208<<14 | 0x41<<7 | 0x59, + 30911 - 19968: jis0212<<14 | 0x2F<<7 | 0x02, + 30913 - 19968: jis0208<<14 | 0x1B<<7 | 0x06, + 30917 - 19968: jis0208<<14 | 0x41<<7 | 0x5B, + 30918 - 19968: jis0208<<14 | 0x41<<7 | 0x56, + 30919 - 19968: jis0212<<14 | 0x2F<<7 | 0x03, + 30920 - 19968: jis0212<<14 | 0x2F<<7 | 0x04, + 30921 - 19968: jis0212<<14 | 0x2F<<7 | 0x05, + 30922 - 19968: jis0208<<14 | 0x41<<7 | 0x5C, + 30923 - 19968: jis0208<<14 | 0x41<<7 | 0x57, + 30924 - 19968: jis0212<<14 | 0x2F<<7 | 0x06, + 30926 - 19968: jis0212<<14 | 0x2F<<7 | 0x07, + 30928 - 19968: jis0208<<14 | 0x27<<7 | 0x37, + 30929 - 19968: jis0208<<14 | 0x41<<7 | 0x55, + 30930 - 19968: jis0212<<14 | 0x2F<<7 | 0x08, + 30931 - 19968: jis0212<<14 | 0x2F<<7 | 0x09, + 30932 - 19968: jis0208<<14 | 0x41<<7 | 0x58, + 30933 - 19968: jis0212<<14 | 0x2F<<7 | 0x0A, + 30934 - 19968: jis0212<<14 | 0x2F<<7 | 0x0B, + 30938 - 19968: jis0208<<14 | 0x42<<7 | 0x01, + 30939 - 19968: jis0212<<14 | 0x2F<<7 | 0x0D, + 30943 - 19968: jis0212<<14 | 0x2F<<7 | 0x0E, + 30944 - 19968: jis0212<<14 | 0x2F<<7 | 0x0F, + 30945 - 19968: jis0212<<14 | 0x2F<<7 | 0x10, + 30948 - 19968: jis0212<<14 | 0x2F<<7 | 0x0C, + 30950 - 19968: jis0212<<14 | 0x2F<<7 | 0x11, + 30951 - 19968: jis0208<<14 | 0x42<<7 | 0x00, + 30952 - 19968: jis0208<<14 | 0x2A<<7 | 0x40, + 30954 - 19968: jis0212<<14 | 0x2F<<7 | 0x12, + 30956 - 19968: jis0208<<14 | 0x41<<7 | 0x5D, + 30959 - 19968: jis0208<<14 | 0x0F<<7 | 0x4A, + 30962 - 19968: jis0212<<14 | 0x2F<<7 | 0x13, + 30963 - 19968: jis0212<<14 | 0x2F<<7 | 0x14, + 30964 - 19968: jis0208<<14 | 0x42<<7 | 0x03, + 30966 - 19968: jis0212<<14 | 0x2F<<7 | 0x16, + 30967 - 19968: jis0212<<14 | 0x2F<<7 | 0x17, + 30970 - 19968: jis0212<<14 | 0x2F<<7 | 0x18, + 30971 - 19968: jis0212<<14 | 0x2F<<7 | 0x19, + 30973 - 19968: jis0208<<14 | 0x42<<7 | 0x02, + 30975 - 19968: jis0212<<14 | 0x2F<<7 | 0x1A, + 30976 - 19968: jis0212<<14 | 0x2F<<7 | 0x15, + 30977 - 19968: jis0208<<14 | 0x1D<<7 | 0x2B, + 30982 - 19968: jis0212<<14 | 0x2F<<7 | 0x1B, + 30983 - 19968: jis0208<<14 | 0x42<<7 | 0x04, + 30988 - 19968: jis0212<<14 | 0x2F<<7 | 0x1C, + 30990 - 19968: jis0208<<14 | 0x20<<7 | 0x22, + 30992 - 19968: jis0212<<14 | 0x2F<<7 | 0x1D, + 30993 - 19968: jis0208<<14 | 0x42<<7 | 0x06, + 30994 - 19968: jis0208<<14 | 0x42<<7 | 0x05, + 31001 - 19968: jis0208<<14 | 0x42<<7 | 0x07, + 31002 - 19968: jis0212<<14 | 0x2F<<7 | 0x1E, + 31004 - 19968: jis0212<<14 | 0x2F<<7 | 0x1F, + 31006 - 19968: jis0212<<14 | 0x2F<<7 | 0x20, + 31007 - 19968: jis0212<<14 | 0x2F<<7 | 0x21, + 31008 - 19968: jis0212<<14 | 0x2F<<7 | 0x22, + 31013 - 19968: jis0212<<14 | 0x2F<<7 | 0x23, + 31014 - 19968: jis0208<<14 | 0x41<<7 | 0x47, + 31015 - 19968: jis0212<<14 | 0x2F<<7 | 0x24, + 31017 - 19968: jis0212<<14 | 0x2F<<7 | 0x25, + 31018 - 19968: jis0208<<14 | 0x41<<7 | 0x49, + 31019 - 19968: jis0208<<14 | 0x42<<7 | 0x09, + 31020 - 19968: jis0208<<14 | 0x42<<7 | 0x08, + 31021 - 19968: jis0212<<14 | 0x2F<<7 | 0x26, + 31024 - 19968: jis0208<<14 | 0x5A<<7 | 0x20, + 31025 - 19968: jis0212<<14 | 0x2F<<7 | 0x27, + 31028 - 19968: jis0212<<14 | 0x2F<<7 | 0x28, + 31029 - 19968: jis0212<<14 | 0x2F<<7 | 0x29, + 31034 - 19968: jis0208<<14 | 0x1B<<7 | 0x07, + 31035 - 19968: jis0212<<14 | 0x2F<<7 | 0x2A, + 31036 - 19968: jis0208<<14 | 0x2D<<7 | 0x48, + 31037 - 19968: jis0212<<14 | 0x2F<<7 | 0x2B, + 31038 - 19968: jis0208<<14 | 0x1B<<7 | 0x31, + 31039 - 19968: jis0212<<14 | 0x2F<<7 | 0x2C, + 31040 - 19968: jis0208<<14 | 0x42<<7 | 0x0A, + 31041 - 19968: jis0208<<14 | 0x16<<7 | 0x16, + 31044 - 19968: jis0212<<14 | 0x2F<<7 | 0x2D, + 31045 - 19968: jis0212<<14 | 0x2F<<7 | 0x2E, + 31046 - 19968: jis0212<<14 | 0x2F<<7 | 0x2F, + 31047 - 19968: jis0208<<14 | 0x14<<7 | 0x1F, + 31048 - 19968: jis0208<<14 | 0x14<<7 | 0x06, + 31049 - 19968: jis0208<<14 | 0x1A<<7 | 0x42, + 31050 - 19968: jis0212<<14 | 0x2F<<7 | 0x30, + 31051 - 19968: jis0212<<14 | 0x2F<<7 | 0x31, + 31055 - 19968: jis0212<<14 | 0x2F<<7 | 0x32, + 31056 - 19968: jis0208<<14 | 0x2C<<7 | 0x13, + 31057 - 19968: jis0212<<14 | 0x2F<<7 | 0x33, + 31059 - 19968: jis0208<<14 | 0x42<<7 | 0x10, + 31060 - 19968: jis0212<<14 | 0x2F<<7 | 0x34, + 31061 - 19968: jis0208<<14 | 0x42<<7 | 0x0F, + 31062 - 19968: jis0208<<14 | 0x20<<7 | 0x23, + 31063 - 19968: jis0208<<14 | 0x42<<7 | 0x0C, + 31064 - 19968: jis0212<<14 | 0x2F<<7 | 0x35, + 31066 - 19968: jis0208<<14 | 0x42<<7 | 0x0E, + 31067 - 19968: jis0212<<14 | 0x2F<<7 | 0x36, + 31068 - 19968: jis0212<<14 | 0x2F<<7 | 0x37, + 31069 - 19968: jis0208<<14 | 0x1C<<7 | 0x2A, + 31070 - 19968: jis0208<<14 | 0x1E<<7 | 0x1F, + 31071 - 19968: jis0208<<14 | 0x42<<7 | 0x0D, + 31072 - 19968: jis0208<<14 | 0x42<<7 | 0x0B, + 31074 - 19968: jis0208<<14 | 0x26<<7 | 0x09, + 31077 - 19968: jis0208<<14 | 0x1D<<7 | 0x2C, + 31079 - 19968: jis0212<<14 | 0x2F<<7 | 0x38, + 31080 - 19968: jis0208<<14 | 0x28<<7 | 0x1B, + 31081 - 19968: jis0212<<14 | 0x2F<<7 | 0x39, + 31083 - 19968: jis0212<<14 | 0x2F<<7 | 0x3A, + 31085 - 19968: jis0208<<14 | 0x19<<7 | 0x36, + 31090 - 19968: jis0212<<14 | 0x2F<<7 | 0x3B, + 31095 - 19968: jis0208<<14 | 0x24<<7 | 0x57, + 31097 - 19968: jis0212<<14 | 0x2F<<7 | 0x3C, + 31098 - 19968: jis0208<<14 | 0x42<<7 | 0x11, + 31099 - 19968: jis0212<<14 | 0x2F<<7 | 0x3D, + 31100 - 19968: jis0212<<14 | 0x2F<<7 | 0x3E, + 31102 - 19968: jis0212<<14 | 0x2F<<7 | 0x3F, + 31103 - 19968: jis0208<<14 | 0x42<<7 | 0x12, + 31104 - 19968: jis0208<<14 | 0x42<<7 | 0x28, + 31105 - 19968: jis0208<<14 | 0x15<<7 | 0x37, + 31108 - 19968: jis0208<<14 | 0x2E<<7 | 0x1C, + 31109 - 19968: jis0208<<14 | 0x20<<7 | 0x14, + 31114 - 19968: jis0208<<14 | 0x42<<7 | 0x13, + 31115 - 19968: jis0212<<14 | 0x2F<<7 | 0x40, + 31116 - 19968: jis0212<<14 | 0x2F<<7 | 0x41, + 31117 - 19968: jis0208<<14 | 0x11<<7 | 0x31, + 31118 - 19968: jis0208<<14 | 0x23<<7 | 0x56, + 31119 - 19968: jis0208<<14 | 0x29<<7 | 0x00, + 31121 - 19968: jis0212<<14 | 0x2F<<7 | 0x42, + 31123 - 19968: jis0212<<14 | 0x2F<<7 | 0x43, + 31124 - 19968: jis0208<<14 | 0x5A<<7 | 0x24, + 31125 - 19968: jis0212<<14 | 0x2F<<7 | 0x45, + 31126 - 19968: jis0212<<14 | 0x2F<<7 | 0x46, + 31128 - 19968: jis0212<<14 | 0x2F<<7 | 0x47, + 31131 - 19968: jis0208<<14 | 0x5A<<7 | 0x26, + 31132 - 19968: jis0212<<14 | 0x2F<<7 | 0x49, + 31133 - 19968: jis0208<<14 | 0x42<<7 | 0x14, + 31137 - 19968: jis0212<<14 | 0x2F<<7 | 0x4A, + 31142 - 19968: jis0208<<14 | 0x14<<7 | 0x59, + 31143 - 19968: jis0208<<14 | 0x42<<7 | 0x15, + 31144 - 19968: jis0212<<14 | 0x2F<<7 | 0x4B, + 31145 - 19968: jis0212<<14 | 0x2F<<7 | 0x4C, + 31146 - 19968: jis0208<<14 | 0x42<<7 | 0x17, + 31147 - 19968: jis0212<<14 | 0x2F<<7 | 0x4D, + 31150 - 19968: jis0208<<14 | 0x42<<7 | 0x18, + 31151 - 19968: jis0212<<14 | 0x2F<<7 | 0x4E, + 31152 - 19968: jis0208<<14 | 0x26<<7 | 0x08, + 31153 - 19968: jis0212<<14 | 0x2F<<7 | 0x4F, + 31155 - 19968: jis0208<<14 | 0x42<<7 | 0x19, + 31156 - 19968: jis0212<<14 | 0x2F<<7 | 0x50, + 31160 - 19968: jis0212<<14 | 0x2F<<7 | 0x51, + 31161 - 19968: jis0208<<14 | 0x42<<7 | 0x1A, + 31162 - 19968: jis0208<<14 | 0x42<<7 | 0x1B, + 31163 - 19968: jis0212<<14 | 0x2F<<7 | 0x52, + 31165 - 19968: jis0208<<14 | 0x15<<7 | 0x38, + 31166 - 19968: jis0208<<14 | 0x11<<7 | 0x32, + 31167 - 19968: jis0208<<14 | 0x25<<7 | 0x24, + 31168 - 19968: jis0208<<14 | 0x1C<<7 | 0x07, + 31169 - 19968: jis0208<<14 | 0x1A<<7 | 0x43, + 31170 - 19968: jis0212<<14 | 0x2F<<7 | 0x53, + 31172 - 19968: jis0212<<14 | 0x2F<<7 | 0x54, + 31175 - 19968: jis0212<<14 | 0x2F<<7 | 0x55, + 31176 - 19968: jis0212<<14 | 0x2F<<7 | 0x56, + 31177 - 19968: jis0208<<14 | 0x42<<7 | 0x1C, + 31178 - 19968: jis0212<<14 | 0x2F<<7 | 0x57, + 31179 - 19968: jis0208<<14 | 0x1C<<7 | 0x08, + 31183 - 19968: jis0212<<14 | 0x2F<<7 | 0x58, + 31185 - 19968: jis0208<<14 | 0x11<<7 | 0x29, + 31186 - 19968: jis0208<<14 | 0x28<<7 | 0x22, + 31188 - 19968: jis0212<<14 | 0x2F<<7 | 0x59, + 31189 - 19968: jis0208<<14 | 0x42<<7 | 0x1D, + 31190 - 19968: jis0212<<14 | 0x2F<<7 | 0x5A, + 31192 - 19968: jis0208<<14 | 0x27<<7 | 0x4A, + 31194 - 19968: jis0212<<14 | 0x2F<<7 | 0x5B, + 31197 - 19968: jis0212<<14 | 0x2F<<7 | 0x5C, + 31198 - 19968: jis0212<<14 | 0x2F<<7 | 0x5D, + 31199 - 19968: jis0208<<14 | 0x20<<7 | 0x24, + 31200 - 19968: jis0212<<14 | 0x30<<7 | 0x00, + 31201 - 19968: jis0208<<14 | 0x42<<7 | 0x20, + 31202 - 19968: jis0212<<14 | 0x30<<7 | 0x01, + 31203 - 19968: jis0208<<14 | 0x42<<7 | 0x21, + 31204 - 19968: jis0208<<14 | 0x26<<7 | 0x48, + 31205 - 19968: jis0212<<14 | 0x30<<7 | 0x02, + 31206 - 19968: jis0208<<14 | 0x1E<<7 | 0x20, + 31207 - 19968: jis0208<<14 | 0x42<<7 | 0x1E, + 31209 - 19968: jis0208<<14 | 0x22<<7 | 0x40, + 31210 - 19968: jis0212<<14 | 0x30<<7 | 0x03, + 31211 - 19968: jis0212<<14 | 0x30<<7 | 0x04, + 31212 - 19968: jis0208<<14 | 0x42<<7 | 0x1F, + 31213 - 19968: jis0212<<14 | 0x30<<7 | 0x05, + 31216 - 19968: jis0208<<14 | 0x1D<<7 | 0x2D, + 31217 - 19968: jis0212<<14 | 0x30<<7 | 0x06, + 31224 - 19968: jis0212<<14 | 0x30<<7 | 0x07, + 31227 - 19968: jis0208<<14 | 0x0F<<7 | 0x3B, + 31228 - 19968: jis0212<<14 | 0x30<<7 | 0x08, + 31232 - 19968: jis0208<<14 | 0x14<<7 | 0x08, + 31234 - 19968: jis0212<<14 | 0x30<<7 | 0x09, + 31235 - 19968: jis0212<<14 | 0x30<<7 | 0x0A, + 31239 - 19968: jis0212<<14 | 0x30<<7 | 0x0B, + 31240 - 19968: jis0208<<14 | 0x42<<7 | 0x22, + 31241 - 19968: jis0212<<14 | 0x30<<7 | 0x0C, + 31242 - 19968: jis0212<<14 | 0x30<<7 | 0x0D, + 31243 - 19968: jis0208<<14 | 0x23<<7 | 0x57, + 31244 - 19968: jis0212<<14 | 0x30<<7 | 0x0E, + 31245 - 19968: jis0208<<14 | 0x42<<7 | 0x23, + 31246 - 19968: jis0208<<14 | 0x1F<<7 | 0x26, + 31249 - 19968: jis0212<<14 | 0x30<<7 | 0x0F, + 31252 - 19968: jis0208<<14 | 0x2B<<7 | 0x0C, + 31253 - 19968: jis0212<<14 | 0x30<<7 | 0x10, + 31255 - 19968: jis0208<<14 | 0x28<<7 | 0x02, + 31256 - 19968: jis0208<<14 | 0x42<<7 | 0x24, + 31257 - 19968: jis0208<<14 | 0x42<<7 | 0x25, + 31258 - 19968: jis0208<<14 | 0x22<<7 | 0x34, + 31259 - 19968: jis0212<<14 | 0x30<<7 | 0x11, + 31260 - 19968: jis0208<<14 | 0x2D<<7 | 0x26, + 31262 - 19968: jis0212<<14 | 0x30<<7 | 0x12, + 31263 - 19968: jis0208<<14 | 0x42<<7 | 0x27, + 31264 - 19968: jis0208<<14 | 0x42<<7 | 0x26, + 31265 - 19968: jis0212<<14 | 0x30<<7 | 0x13, + 31271 - 19968: jis0212<<14 | 0x30<<7 | 0x14, + 31275 - 19968: jis0212<<14 | 0x30<<7 | 0x15, + 31277 - 19968: jis0212<<14 | 0x30<<7 | 0x16, + 31278 - 19968: jis0208<<14 | 0x1B<<7 | 0x4E, + 31279 - 19968: jis0212<<14 | 0x30<<7 | 0x17, + 31280 - 19968: jis0212<<14 | 0x30<<7 | 0x18, + 31281 - 19968: jis0208<<14 | 0x42<<7 | 0x29, + 31282 - 19968: jis0208<<14 | 0x0F<<7 | 0x4F, + 31284 - 19968: jis0212<<14 | 0x30<<7 | 0x19, + 31285 - 19968: jis0212<<14 | 0x30<<7 | 0x1A, + 31287 - 19968: jis0208<<14 | 0x42<<7 | 0x2C, + 31288 - 19968: jis0212<<14 | 0x30<<7 | 0x1B, + 31289 - 19968: jis0212<<14 | 0x30<<7 | 0x1C, + 31290 - 19968: jis0212<<14 | 0x30<<7 | 0x1D, + 31291 - 19968: jis0208<<14 | 0x42<<7 | 0x2A, + 31292 - 19968: jis0208<<14 | 0x11<<7 | 0x33, + 31293 - 19968: jis0208<<14 | 0x16<<7 | 0x2D, + 31294 - 19968: jis0208<<14 | 0x42<<7 | 0x2B, + 31295 - 19968: jis0208<<14 | 0x18<<7 | 0x25, + 31296 - 19968: jis0208<<14 | 0x18<<7 | 0x51, + 31298 - 19968: jis0208<<14 | 0x29<<7 | 0x45, + 31299 - 19968: jis0208<<14 | 0x42<<7 | 0x2D, + 31300 - 19968: jis0212<<14 | 0x30<<7 | 0x1E, + 31301 - 19968: jis0212<<14 | 0x30<<7 | 0x1F, + 31302 - 19968: jis0208<<14 | 0x2A<<7 | 0x33, + 31303 - 19968: jis0212<<14 | 0x30<<7 | 0x20, + 31304 - 19968: jis0212<<14 | 0x30<<7 | 0x21, + 31305 - 19968: jis0208<<14 | 0x42<<7 | 0x2F, + 31308 - 19968: jis0212<<14 | 0x30<<7 | 0x22, + 31309 - 19968: jis0208<<14 | 0x1F<<7 | 0x30, + 31310 - 19968: jis0208<<14 | 0x10<<7 | 0x2E, + 31311 - 19968: jis0208<<14 | 0x11<<7 | 0x19, + 31312 - 19968: jis0208<<14 | 0x0F<<7 | 0x0B, + 31317 - 19968: jis0212<<14 | 0x30<<7 | 0x23, + 31318 - 19968: jis0212<<14 | 0x30<<7 | 0x24, + 31319 - 19968: jis0208<<14 | 0x42<<7 | 0x2E, + 31321 - 19968: jis0212<<14 | 0x30<<7 | 0x25, + 31324 - 19968: jis0212<<14 | 0x30<<7 | 0x26, + 31325 - 19968: jis0212<<14 | 0x30<<7 | 0x27, + 31327 - 19968: jis0212<<14 | 0x30<<7 | 0x28, + 31328 - 19968: jis0212<<14 | 0x30<<7 | 0x29, + 31329 - 19968: jis0208<<14 | 0x42<<7 | 0x30, + 31330 - 19968: jis0208<<14 | 0x42<<7 | 0x31, + 31331 - 19968: jis0208<<14 | 0x1D<<7 | 0x56, + 31333 - 19968: jis0212<<14 | 0x30<<7 | 0x2A, + 31335 - 19968: jis0212<<14 | 0x30<<7 | 0x2B, + 31337 - 19968: jis0208<<14 | 0x42<<7 | 0x32, + 31338 - 19968: jis0212<<14 | 0x30<<7 | 0x2C, + 31339 - 19968: jis0208<<14 | 0x12<<7 | 0x2E, + 31341 - 19968: jis0212<<14 | 0x30<<7 | 0x2D, + 31344 - 19968: jis0208<<14 | 0x42<<7 | 0x34, + 31348 - 19968: jis0208<<14 | 0x16<<7 | 0x49, + 31349 - 19968: jis0212<<14 | 0x30<<7 | 0x2E, + 31350 - 19968: jis0208<<14 | 0x14<<7 | 0x45, + 31352 - 19968: jis0212<<14 | 0x30<<7 | 0x2F, + 31353 - 19968: jis0208<<14 | 0x42<<7 | 0x35, + 31354 - 19968: jis0208<<14 | 0x15<<7 | 0x54, + 31357 - 19968: jis0208<<14 | 0x42<<7 | 0x36, + 31358 - 19968: jis0212<<14 | 0x30<<7 | 0x30, + 31359 - 19968: jis0208<<14 | 0x1F<<7 | 0x5B, + 31360 - 19968: jis0212<<14 | 0x30<<7 | 0x31, + 31361 - 19968: jis0208<<14 | 0x25<<7 | 0x2C, + 31362 - 19968: jis0212<<14 | 0x30<<7 | 0x32, + 31363 - 19968: jis0208<<14 | 0x1F<<7 | 0x3F, + 31364 - 19968: jis0208<<14 | 0x19<<7 | 0x54, + 31365 - 19968: jis0212<<14 | 0x30<<7 | 0x33, + 31366 - 19968: jis0212<<14 | 0x30<<7 | 0x34, + 31368 - 19968: jis0208<<14 | 0x42<<7 | 0x37, + 31370 - 19968: jis0212<<14 | 0x30<<7 | 0x35, + 31371 - 19968: jis0212<<14 | 0x30<<7 | 0x36, + 31376 - 19968: jis0212<<14 | 0x30<<7 | 0x37, + 31377 - 19968: jis0212<<14 | 0x30<<7 | 0x38, + 31378 - 19968: jis0208<<14 | 0x22<<7 | 0x41, + 31379 - 19968: jis0208<<14 | 0x20<<7 | 0x4A, + 31380 - 19968: jis0212<<14 | 0x30<<7 | 0x39, + 31381 - 19968: jis0208<<14 | 0x42<<7 | 0x39, + 31382 - 19968: jis0208<<14 | 0x42<<7 | 0x3B, + 31383 - 19968: jis0208<<14 | 0x42<<7 | 0x38, + 31384 - 19968: jis0208<<14 | 0x42<<7 | 0x3A, + 31390 - 19968: jis0212<<14 | 0x30<<7 | 0x3A, + 31391 - 19968: jis0208<<14 | 0x16<<7 | 0x01, + 31392 - 19968: jis0212<<14 | 0x30<<7 | 0x3B, + 31395 - 19968: jis0212<<14 | 0x30<<7 | 0x3C, + 31401 - 19968: jis0208<<14 | 0x42<<7 | 0x3C, + 31402 - 19968: jis0208<<14 | 0x16<<7 | 0x05, + 31404 - 19968: jis0212<<14 | 0x30<<7 | 0x3D, + 31406 - 19968: jis0208<<14 | 0x14<<7 | 0x46, + 31407 - 19968: jis0208<<14 | 0x2C<<7 | 0x31, + 31408 - 19968: jis0208<<14 | 0x42<<7 | 0x3E, + 31411 - 19968: jis0212<<14 | 0x30<<7 | 0x3E, + 31413 - 19968: jis0212<<14 | 0x30<<7 | 0x3F, + 31414 - 19968: jis0208<<14 | 0x42<<7 | 0x3F, + 31417 - 19968: jis0212<<14 | 0x30<<7 | 0x40, + 31418 - 19968: jis0208<<14 | 0x10<<7 | 0x0D, + 31419 - 19968: jis0212<<14 | 0x30<<7 | 0x41, + 31420 - 19968: jis0212<<14 | 0x30<<7 | 0x42, + 31423 - 19968: jis0208<<14 | 0x42<<7 | 0x42, + 31427 - 19968: jis0208<<14 | 0x12<<7 | 0x55, + 31428 - 19968: jis0208<<14 | 0x42<<7 | 0x41, + 31429 - 19968: jis0208<<14 | 0x42<<7 | 0x40, + 31430 - 19968: jis0212<<14 | 0x30<<7 | 0x43, + 31431 - 19968: jis0208<<14 | 0x42<<7 | 0x44, + 31432 - 19968: jis0208<<14 | 0x42<<7 | 0x3D, + 31433 - 19968: jis0212<<14 | 0x30<<7 | 0x44, + 31434 - 19968: jis0208<<14 | 0x42<<7 | 0x45, + 31435 - 19968: jis0208<<14 | 0x2D<<7 | 0x08, + 31436 - 19968: jis0212<<14 | 0x30<<7 | 0x45, + 31437 - 19968: jis0208<<14 | 0x42<<7 | 0x46, + 31438 - 19968: jis0212<<14 | 0x30<<7 | 0x46, + 31439 - 19968: jis0208<<14 | 0x42<<7 | 0x47, + 31441 - 19968: jis0208<<14 | 0x5A<<7 | 0x27, + 31442 - 19968: jis0208<<14 | 0x33<<7 | 0x53, + 31443 - 19968: jis0208<<14 | 0x42<<7 | 0x49, + 31445 - 19968: jis0208<<14 | 0x42<<7 | 0x48, + 31449 - 19968: jis0208<<14 | 0x42<<7 | 0x4A, + 31450 - 19968: jis0208<<14 | 0x42<<7 | 0x4B, + 31451 - 19968: jis0212<<14 | 0x30<<7 | 0x48, + 31452 - 19968: jis0208<<14 | 0x2D<<7 | 0x14, + 31453 - 19968: jis0208<<14 | 0x42<<7 | 0x4C, + 31455 - 19968: jis0208<<14 | 0x4F<<7 | 0x4E, + 31456 - 19968: jis0208<<14 | 0x1D<<7 | 0x2E, + 31457 - 19968: jis0208<<14 | 0x42<<7 | 0x4D, + 31458 - 19968: jis0208<<14 | 0x42<<7 | 0x4E, + 31459 - 19968: jis0208<<14 | 0x1C<<7 | 0x36, + 31461 - 19968: jis0208<<14 | 0x25<<7 | 0x17, + 31462 - 19968: jis0208<<14 | 0x42<<7 | 0x4F, + 31463 - 19968: jis0208<<14 | 0x5A<<7 | 0x28, + 31464 - 19968: jis0212<<14 | 0x30<<7 | 0x49, + 31465 - 19968: jis0212<<14 | 0x30<<7 | 0x4A, + 31466 - 19968: jis0208<<14 | 0x22<<7 | 0x07, + 31467 - 19968: jis0208<<14 | 0x5A<<7 | 0x2A, + 31468 - 19968: jis0212<<14 | 0x30<<7 | 0x4C, + 31469 - 19968: jis0208<<14 | 0x42<<7 | 0x50, + 31471 - 19968: jis0208<<14 | 0x22<<7 | 0x1B, + 31472 - 19968: jis0208<<14 | 0x42<<7 | 0x51, + 31473 - 19968: jis0212<<14 | 0x30<<7 | 0x4D, + 31476 - 19968: jis0212<<14 | 0x30<<7 | 0x4E, + 31478 - 19968: jis0208<<14 | 0x15<<7 | 0x04, + 31480 - 19968: jis0208<<14 | 0x30<<7 | 0x1E, + 31481 - 19968: jis0208<<14 | 0x22<<7 | 0x3C, + 31482 - 19968: jis0208<<14 | 0x1B<<7 | 0x12, + 31483 - 19968: jis0212<<14 | 0x30<<7 | 0x4F, + 31485 - 19968: jis0212<<14 | 0x30<<7 | 0x50, + 31486 - 19968: jis0212<<14 | 0x30<<7 | 0x51, + 31487 - 19968: jis0208<<14 | 0x13<<7 | 0x27, + 31490 - 19968: jis0208<<14 | 0x42<<7 | 0x52, + 31492 - 19968: jis0208<<14 | 0x43<<7 | 0x01, + 31494 - 19968: jis0208<<14 | 0x42<<7 | 0x55, + 31495 - 19968: jis0212<<14 | 0x30<<7 | 0x52, + 31496 - 19968: jis0208<<14 | 0x14<<7 | 0x47, + 31498 - 19968: jis0208<<14 | 0x42<<7 | 0x54, + 31499 - 19968: jis0208<<14 | 0x43<<7 | 0x03, + 31503 - 19968: jis0208<<14 | 0x42<<7 | 0x53, + 31505 - 19968: jis0208<<14 | 0x1D<<7 | 0x2F, + 31508 - 19968: jis0212<<14 | 0x30<<7 | 0x53, + 31512 - 19968: jis0208<<14 | 0x42<<7 | 0x57, + 31513 - 19968: jis0208<<14 | 0x42<<7 | 0x58, + 31515 - 19968: jis0208<<14 | 0x24<<7 | 0x0A, + 31518 - 19968: jis0208<<14 | 0x42<<7 | 0x59, + 31519 - 19968: jis0212<<14 | 0x30<<7 | 0x54, + 31520 - 19968: jis0208<<14 | 0x12<<7 | 0x3D, + 31523 - 19968: jis0212<<14 | 0x30<<7 | 0x55, + 31525 - 19968: jis0208<<14 | 0x1E<<7 | 0x39, + 31526 - 19968: jis0208<<14 | 0x28<<7 | 0x43, + 31527 - 19968: jis0212<<14 | 0x30<<7 | 0x56, + 31528 - 19968: jis0208<<14 | 0x42<<7 | 0x5B, + 31529 - 19968: jis0212<<14 | 0x30<<7 | 0x57, + 31530 - 19968: jis0212<<14 | 0x30<<7 | 0x58, + 31531 - 19968: jis0212<<14 | 0x30<<7 | 0x59, + 31532 - 19968: jis0208<<14 | 0x21<<7 | 0x47, + 31533 - 19968: jis0212<<14 | 0x30<<7 | 0x5A, + 31534 - 19968: jis0212<<14 | 0x30<<7 | 0x5B, + 31535 - 19968: jis0212<<14 | 0x30<<7 | 0x5C, + 31536 - 19968: jis0212<<14 | 0x30<<7 | 0x5D, + 31537 - 19968: jis0212<<14 | 0x31<<7 | 0x00, + 31539 - 19968: jis0208<<14 | 0x42<<7 | 0x56, + 31540 - 19968: jis0212<<14 | 0x31<<7 | 0x01, + 31541 - 19968: jis0208<<14 | 0x42<<7 | 0x5A, + 31542 - 19968: jis0208<<14 | 0x42<<7 | 0x5C, + 31545 - 19968: jis0208<<14 | 0x19<<7 | 0x5A, + 31549 - 19968: jis0212<<14 | 0x31<<7 | 0x02, + 31551 - 19968: jis0212<<14 | 0x31<<7 | 0x03, + 31552 - 19968: jis0212<<14 | 0x31<<7 | 0x04, + 31553 - 19968: jis0212<<14 | 0x31<<7 | 0x05, + 31557 - 19968: jis0208<<14 | 0x43<<7 | 0x05, + 31558 - 19968: jis0208<<14 | 0x28<<7 | 0x0D, + 31559 - 19968: jis0212<<14 | 0x31<<7 | 0x06, + 31560 - 19968: jis0208<<14 | 0x27<<7 | 0x05, + 31561 - 19968: jis0208<<14 | 0x24<<7 | 0x58, + 31563 - 19968: jis0208<<14 | 0x15<<7 | 0x39, + 31564 - 19968: jis0208<<14 | 0x43<<7 | 0x04, + 31565 - 19968: jis0208<<14 | 0x43<<7 | 0x02, + 31566 - 19968: jis0212<<14 | 0x31<<7 | 0x07, + 31567 - 19968: jis0208<<14 | 0x27<<7 | 0x14, + 31568 - 19968: jis0208<<14 | 0x42<<7 | 0x5D, + 31569 - 19968: jis0208<<14 | 0x22<<7 | 0x3D, + 31570 - 19968: jis0208<<14 | 0x24<<7 | 0x5A, + 31572 - 19968: jis0208<<14 | 0x24<<7 | 0x59, + 31573 - 19968: jis0212<<14 | 0x31<<7 | 0x08, + 31574 - 19968: jis0208<<14 | 0x19<<7 | 0x55, + 31581 - 19968: jis0208<<14 | 0x43<<7 | 0x17, + 31584 - 19968: jis0212<<14 | 0x31<<7 | 0x09, + 31588 - 19968: jis0212<<14 | 0x31<<7 | 0x0A, + 31589 - 19968: jis0208<<14 | 0x43<<7 | 0x07, + 31590 - 19968: jis0212<<14 | 0x31<<7 | 0x0B, + 31591 - 19968: jis0208<<14 | 0x43<<7 | 0x09, + 31593 - 19968: jis0212<<14 | 0x31<<7 | 0x0C, + 31594 - 19968: jis0212<<14 | 0x31<<7 | 0x0D, + 31596 - 19968: jis0208<<14 | 0x43<<7 | 0x0C, + 31597 - 19968: jis0212<<14 | 0x31<<7 | 0x0E, + 31598 - 19968: jis0208<<14 | 0x43<<7 | 0x0D, + 31599 - 19968: jis0212<<14 | 0x31<<7 | 0x0F, + 31600 - 19968: jis0208<<14 | 0x43<<7 | 0x0A, + 31601 - 19968: jis0208<<14 | 0x43<<7 | 0x0B, + 31602 - 19968: jis0212<<14 | 0x31<<7 | 0x10, + 31603 - 19968: jis0212<<14 | 0x31<<7 | 0x11, + 31604 - 19968: jis0208<<14 | 0x43<<7 | 0x08, + 31605 - 19968: jis0208<<14 | 0x43<<7 | 0x06, + 31607 - 19968: jis0212<<14 | 0x31<<7 | 0x12, + 31610 - 19968: jis0208<<14 | 0x43<<7 | 0x00, + 31620 - 19968: jis0212<<14 | 0x31<<7 | 0x13, + 31622 - 19968: jis0208<<14 | 0x29<<7 | 0x2E, + 31623 - 19968: jis0208<<14 | 0x11<<7 | 0x34, + 31625 - 19968: jis0212<<14 | 0x31<<7 | 0x14, + 31627 - 19968: jis0208<<14 | 0x43<<7 | 0x14, + 31629 - 19968: jis0208<<14 | 0x43<<7 | 0x11, + 31630 - 19968: jis0212<<14 | 0x31<<7 | 0x15, + 31631 - 19968: jis0208<<14 | 0x43<<7 | 0x16, + 31632 - 19968: jis0212<<14 | 0x31<<7 | 0x16, + 31633 - 19968: jis0212<<14 | 0x31<<7 | 0x17, + 31634 - 19968: jis0208<<14 | 0x43<<7 | 0x15, + 31636 - 19968: jis0208<<14 | 0x26<<7 | 0x52, + 31637 - 19968: jis0208<<14 | 0x2B<<7 | 0x06, + 31638 - 19968: jis0212<<14 | 0x31<<7 | 0x18, + 31639 - 19968: jis0208<<14 | 0x1A<<7 | 0x1A, + 31640 - 19968: jis0208<<14 | 0x43<<7 | 0x0F, + 31641 - 19968: jis0208<<14 | 0x43<<7 | 0x18, + 31642 - 19968: jis0208<<14 | 0x43<<7 | 0x13, + 31643 - 19968: jis0212<<14 | 0x31<<7 | 0x19, + 31644 - 19968: jis0208<<14 | 0x43<<7 | 0x12, + 31645 - 19968: jis0208<<14 | 0x43<<7 | 0x0E, + 31646 - 19968: jis0208<<14 | 0x5A<<7 | 0x2B, + 31647 - 19968: jis0208<<14 | 0x43<<7 | 0x10, + 31648 - 19968: jis0212<<14 | 0x31<<7 | 0x1B, + 31649 - 19968: jis0208<<14 | 0x13<<7 | 0x28, + 31653 - 19968: jis0212<<14 | 0x31<<7 | 0x1C, + 31658 - 19968: jis0208<<14 | 0x22<<7 | 0x1C, + 31660 - 19968: jis0212<<14 | 0x31<<7 | 0x1D, + 31661 - 19968: jis0208<<14 | 0x1F<<7 | 0x5C, + 31663 - 19968: jis0212<<14 | 0x31<<7 | 0x1E, + 31664 - 19968: jis0212<<14 | 0x31<<7 | 0x1F, + 31665 - 19968: jis0208<<14 | 0x27<<7 | 0x01, + 31666 - 19968: jis0212<<14 | 0x31<<7 | 0x20, + 31668 - 19968: jis0208<<14 | 0x43<<7 | 0x1D, + 31669 - 19968: jis0212<<14 | 0x31<<7 | 0x21, + 31670 - 19968: jis0212<<14 | 0x31<<7 | 0x22, + 31672 - 19968: jis0208<<14 | 0x27<<7 | 0x03, + 31674 - 19968: jis0212<<14 | 0x31<<7 | 0x23, + 31675 - 19968: jis0212<<14 | 0x31<<7 | 0x24, + 31676 - 19968: jis0212<<14 | 0x31<<7 | 0x25, + 31677 - 19968: jis0212<<14 | 0x31<<7 | 0x26, + 31680 - 19968: jis0208<<14 | 0x1F<<7 | 0x40, + 31681 - 19968: jis0208<<14 | 0x43<<7 | 0x1A, + 31682 - 19968: jis0212<<14 | 0x31<<7 | 0x27, + 31684 - 19968: jis0208<<14 | 0x27<<7 | 0x2E, + 31685 - 19968: jis0212<<14 | 0x31<<7 | 0x28, + 31686 - 19968: jis0208<<14 | 0x43<<7 | 0x1E, + 31687 - 19968: jis0208<<14 | 0x29<<7 | 0x32, + 31688 - 19968: jis0212<<14 | 0x31<<7 | 0x29, + 31689 - 19968: jis0208<<14 | 0x22<<7 | 0x3A, + 31690 - 19968: jis0212<<14 | 0x31<<7 | 0x2A, + 31691 - 19968: jis0208<<14 | 0x43<<7 | 0x19, + 31692 - 19968: jis0208<<14 | 0x43<<7 | 0x1B, + 31695 - 19968: jis0208<<14 | 0x43<<7 | 0x1C, + 31700 - 19968: jis0212<<14 | 0x31<<7 | 0x2B, + 31702 - 19968: jis0212<<14 | 0x31<<7 | 0x2C, + 31703 - 19968: jis0212<<14 | 0x31<<7 | 0x2D, + 31705 - 19968: jis0212<<14 | 0x31<<7 | 0x2E, + 31706 - 19968: jis0212<<14 | 0x31<<7 | 0x2F, + 31707 - 19968: jis0212<<14 | 0x31<<7 | 0x30, + 31709 - 19968: jis0208<<14 | 0x43<<7 | 0x1F, + 31712 - 19968: jis0208<<14 | 0x1B<<7 | 0x23, + 31716 - 19968: jis0208<<14 | 0x25<<7 | 0x25, + 31717 - 19968: jis0208<<14 | 0x43<<7 | 0x24, + 31718 - 19968: jis0208<<14 | 0x43<<7 | 0x23, + 31720 - 19968: jis0212<<14 | 0x31<<7 | 0x31, + 31721 - 19968: jis0208<<14 | 0x43<<7 | 0x20, + 31722 - 19968: jis0212<<14 | 0x31<<7 | 0x32, + 31725 - 19968: jis0208<<14 | 0x2E<<7 | 0x15, + 31730 - 19968: jis0212<<14 | 0x31<<7 | 0x33, + 31731 - 19968: jis0208<<14 | 0x43<<7 | 0x29, + 31732 - 19968: jis0212<<14 | 0x31<<7 | 0x34, + 31733 - 19968: jis0212<<14 | 0x31<<7 | 0x35, + 31734 - 19968: jis0208<<14 | 0x43<<7 | 0x2D, + 31735 - 19968: jis0208<<14 | 0x43<<7 | 0x2A, + 31736 - 19968: jis0212<<14 | 0x31<<7 | 0x36, + 31737 - 19968: jis0212<<14 | 0x31<<7 | 0x37, + 31738 - 19968: jis0212<<14 | 0x31<<7 | 0x38, + 31740 - 19968: jis0212<<14 | 0x31<<7 | 0x39, + 31742 - 19968: jis0212<<14 | 0x31<<7 | 0x3A, + 31744 - 19968: jis0208<<14 | 0x43<<7 | 0x26, + 31745 - 19968: jis0212<<14 | 0x31<<7 | 0x3B, + 31746 - 19968: jis0212<<14 | 0x31<<7 | 0x3C, + 31747 - 19968: jis0212<<14 | 0x31<<7 | 0x3D, + 31748 - 19968: jis0212<<14 | 0x31<<7 | 0x3E, + 31750 - 19968: jis0212<<14 | 0x31<<7 | 0x3F, + 31751 - 19968: jis0208<<14 | 0x43<<7 | 0x27, + 31753 - 19968: jis0212<<14 | 0x31<<7 | 0x40, + 31755 - 19968: jis0212<<14 | 0x31<<7 | 0x41, + 31756 - 19968: jis0212<<14 | 0x31<<7 | 0x42, + 31757 - 19968: jis0208<<14 | 0x43<<7 | 0x2C, + 31758 - 19968: jis0212<<14 | 0x31<<7 | 0x43, + 31759 - 19968: jis0212<<14 | 0x31<<7 | 0x44, + 31761 - 19968: jis0208<<14 | 0x43<<7 | 0x21, + 31762 - 19968: jis0208<<14 | 0x31<<7 | 0x34, + 31763 - 19968: jis0208<<14 | 0x43<<7 | 0x28, + 31764 - 19968: jis0208<<14 | 0x43<<7 | 0x22, + 31767 - 19968: jis0208<<14 | 0x43<<7 | 0x2B, + 31769 - 19968: jis0212<<14 | 0x31<<7 | 0x45, + 31771 - 19968: jis0212<<14 | 0x31<<7 | 0x46, + 31775 - 19968: jis0208<<14 | 0x43<<7 | 0x31, + 31776 - 19968: jis0212<<14 | 0x31<<7 | 0x47, + 31777 - 19968: jis0208<<14 | 0x13<<7 | 0x29, + 31779 - 19968: jis0208<<14 | 0x43<<7 | 0x2E, + 31781 - 19968: jis0212<<14 | 0x31<<7 | 0x48, + 31782 - 19968: jis0212<<14 | 0x31<<7 | 0x49, + 31783 - 19968: jis0208<<14 | 0x43<<7 | 0x2F, + 31784 - 19968: jis0212<<14 | 0x31<<7 | 0x4A, + 31786 - 19968: jis0208<<14 | 0x43<<7 | 0x30, + 31787 - 19968: jis0208<<14 | 0x43<<7 | 0x33, + 31788 - 19968: jis0212<<14 | 0x31<<7 | 0x4B, + 31793 - 19968: jis0212<<14 | 0x31<<7 | 0x4C, + 31795 - 19968: jis0212<<14 | 0x31<<7 | 0x4D, + 31796 - 19968: jis0212<<14 | 0x31<<7 | 0x4E, + 31798 - 19968: jis0212<<14 | 0x31<<7 | 0x4F, + 31799 - 19968: jis0208<<14 | 0x43<<7 | 0x32, + 31800 - 19968: jis0208<<14 | 0x27<<7 | 0x55, + 31801 - 19968: jis0212<<14 | 0x31<<7 | 0x50, + 31802 - 19968: jis0212<<14 | 0x31<<7 | 0x51, + 31805 - 19968: jis0208<<14 | 0x43<<7 | 0x34, + 31806 - 19968: jis0208<<14 | 0x2D<<7 | 0x5B, + 31807 - 19968: jis0208<<14 | 0x29<<7 | 0x4C, + 31808 - 19968: jis0208<<14 | 0x43<<7 | 0x39, + 31811 - 19968: jis0208<<14 | 0x43<<7 | 0x36, + 31814 - 19968: jis0212<<14 | 0x31<<7 | 0x52, + 31818 - 19968: jis0212<<14 | 0x31<<7 | 0x53, + 31820 - 19968: jis0208<<14 | 0x43<<7 | 0x35, + 31821 - 19968: jis0208<<14 | 0x1F<<7 | 0x31, + 31823 - 19968: jis0208<<14 | 0x43<<7 | 0x38, + 31824 - 19968: jis0208<<14 | 0x43<<7 | 0x3A, + 31825 - 19968: jis0212<<14 | 0x31<<7 | 0x55, + 31826 - 19968: jis0212<<14 | 0x31<<7 | 0x56, + 31827 - 19968: jis0212<<14 | 0x31<<7 | 0x57, + 31828 - 19968: jis0208<<14 | 0x43<<7 | 0x37, + 31829 - 19968: jis0212<<14 | 0x31<<7 | 0x54, + 31830 - 19968: jis0208<<14 | 0x43<<7 | 0x3E, + 31832 - 19968: jis0208<<14 | 0x43<<7 | 0x3B, + 31833 - 19968: jis0212<<14 | 0x31<<7 | 0x58, + 31834 - 19968: jis0212<<14 | 0x31<<7 | 0x59, + 31835 - 19968: jis0212<<14 | 0x31<<7 | 0x5A, + 31836 - 19968: jis0212<<14 | 0x31<<7 | 0x5B, + 31837 - 19968: jis0212<<14 | 0x31<<7 | 0x5C, + 31838 - 19968: jis0212<<14 | 0x31<<7 | 0x5D, + 31839 - 19968: jis0208<<14 | 0x43<<7 | 0x3C, + 31840 - 19968: jis0208<<14 | 0x43<<7 | 0x25, + 31841 - 19968: jis0212<<14 | 0x32<<7 | 0x00, + 31843 - 19968: jis0212<<14 | 0x32<<7 | 0x01, + 31844 - 19968: jis0208<<14 | 0x43<<7 | 0x3D, + 31845 - 19968: jis0208<<14 | 0x43<<7 | 0x3F, + 31847 - 19968: jis0212<<14 | 0x32<<7 | 0x02, + 31849 - 19968: jis0212<<14 | 0x32<<7 | 0x03, + 31852 - 19968: jis0208<<14 | 0x43<<7 | 0x40, + 31853 - 19968: jis0212<<14 | 0x32<<7 | 0x04, + 31854 - 19968: jis0212<<14 | 0x32<<7 | 0x05, + 31856 - 19968: jis0212<<14 | 0x32<<7 | 0x06, + 31858 - 19968: jis0212<<14 | 0x32<<7 | 0x07, + 31859 - 19968: jis0208<<14 | 0x29<<7 | 0x25, + 31861 - 19968: jis0208<<14 | 0x43<<7 | 0x41, + 31865 - 19968: jis0212<<14 | 0x32<<7 | 0x08, + 31868 - 19968: jis0212<<14 | 0x32<<7 | 0x09, + 31869 - 19968: jis0212<<14 | 0x32<<7 | 0x0A, + 31870 - 19968: jis0208<<14 | 0x2B<<7 | 0x41, + 31873 - 19968: jis0208<<14 | 0x15<<7 | 0x2D, + 31874 - 19968: jis0208<<14 | 0x16<<7 | 0x08, + 31875 - 19968: jis0208<<14 | 0x43<<7 | 0x42, + 31878 - 19968: jis0212<<14 | 0x32<<7 | 0x0B, + 31879 - 19968: jis0212<<14 | 0x32<<7 | 0x0C, + 31881 - 19968: jis0208<<14 | 0x29<<7 | 0x13, + 31883 - 19968: jis0208<<14 | 0x1E<<7 | 0x47, + 31885 - 19968: jis0208<<14 | 0x2B<<7 | 0x0F, + 31887 - 19968: jis0212<<14 | 0x32<<7 | 0x0D, + 31888 - 19968: jis0208<<14 | 0x43<<7 | 0x43, + 31890 - 19968: jis0208<<14 | 0x2D<<7 | 0x12, + 31892 - 19968: jis0212<<14 | 0x32<<7 | 0x0E, + 31893 - 19968: jis0208<<14 | 0x26<<7 | 0x53, + 31895 - 19968: jis0208<<14 | 0x20<<7 | 0x25, + 31896 - 19968: jis0208<<14 | 0x26<<7 | 0x13, + 31899 - 19968: jis0208<<14 | 0x1C<<7 | 0x2C, + 31902 - 19968: jis0212<<14 | 0x32<<7 | 0x0F, + 31903 - 19968: jis0208<<14 | 0x0F<<7 | 0x1F, + 31904 - 19968: jis0212<<14 | 0x32<<7 | 0x10, + 31905 - 19968: jis0208<<14 | 0x43<<7 | 0x48, + 31906 - 19968: jis0208<<14 | 0x43<<7 | 0x46, + 31908 - 19968: jis0208<<14 | 0x43<<7 | 0x44, + 31909 - 19968: jis0208<<14 | 0x13<<7 | 0x00, + 31910 - 19968: jis0212<<14 | 0x32<<7 | 0x11, + 31911 - 19968: jis0208<<14 | 0x1D<<7 | 0x30, + 31912 - 19968: jis0208<<14 | 0x43<<7 | 0x49, + 31915 - 19968: jis0208<<14 | 0x43<<7 | 0x47, + 31917 - 19968: jis0208<<14 | 0x43<<7 | 0x45, + 31918 - 19968: jis0208<<14 | 0x43<<7 | 0x4D, + 31920 - 19968: jis0212<<14 | 0x32<<7 | 0x12, + 31921 - 19968: jis0208<<14 | 0x43<<7 | 0x4C, + 31922 - 19968: jis0208<<14 | 0x43<<7 | 0x4B, + 31923 - 19968: jis0208<<14 | 0x43<<7 | 0x4A, + 31926 - 19968: jis0212<<14 | 0x32<<7 | 0x13, + 31927 - 19968: jis0212<<14 | 0x32<<7 | 0x14, + 31929 - 19968: jis0208<<14 | 0x43<<7 | 0x4E, + 31930 - 19968: jis0212<<14 | 0x32<<7 | 0x15, + 31931 - 19968: jis0212<<14 | 0x32<<7 | 0x16, + 31932 - 19968: jis0212<<14 | 0x32<<7 | 0x17, + 31933 - 19968: jis0208<<14 | 0x43<<7 | 0x4F, + 31934 - 19968: jis0208<<14 | 0x1F<<7 | 0x19, + 31935 - 19968: jis0212<<14 | 0x32<<7 | 0x18, + 31936 - 19968: jis0208<<14 | 0x43<<7 | 0x50, + 31938 - 19968: jis0208<<14 | 0x43<<7 | 0x52, + 31940 - 19968: jis0212<<14 | 0x32<<7 | 0x19, + 31941 - 19968: jis0208<<14 | 0x43<<7 | 0x51, + 31943 - 19968: jis0212<<14 | 0x32<<7 | 0x1A, + 31944 - 19968: jis0212<<14 | 0x32<<7 | 0x1B, + 31945 - 19968: jis0212<<14 | 0x32<<7 | 0x1C, + 31946 - 19968: jis0208<<14 | 0x17<<7 | 0x31, + 31949 - 19968: jis0212<<14 | 0x32<<7 | 0x1D, + 31950 - 19968: jis0208<<14 | 0x20<<7 | 0x17, + 31951 - 19968: jis0212<<14 | 0x32<<7 | 0x1E, + 31954 - 19968: jis0208<<14 | 0x43<<7 | 0x54, + 31955 - 19968: jis0212<<14 | 0x32<<7 | 0x1F, + 31956 - 19968: jis0212<<14 | 0x32<<7 | 0x20, + 31957 - 19968: jis0212<<14 | 0x32<<7 | 0x21, + 31958 - 19968: jis0208<<14 | 0x24<<7 | 0x5B, + 31959 - 19968: jis0212<<14 | 0x32<<7 | 0x22, + 31960 - 19968: jis0208<<14 | 0x43<<7 | 0x53, + 31961 - 19968: jis0212<<14 | 0x32<<7 | 0x23, + 31962 - 19968: jis0212<<14 | 0x32<<7 | 0x24, + 31964 - 19968: jis0208<<14 | 0x43<<7 | 0x55, + 31965 - 19968: jis0212<<14 | 0x32<<7 | 0x25, + 31966 - 19968: jis0208<<14 | 0x29<<7 | 0x14, + 31967 - 19968: jis0208<<14 | 0x20<<7 | 0x4B, + 31968 - 19968: jis0208<<14 | 0x18<<7 | 0x26, + 31970 - 19968: jis0208<<14 | 0x43<<7 | 0x56, + 31974 - 19968: jis0212<<14 | 0x32<<7 | 0x26, + 31975 - 19968: jis0208<<14 | 0x2D<<7 | 0x27, + 31977 - 19968: jis0212<<14 | 0x32<<7 | 0x27, + 31979 - 19968: jis0212<<14 | 0x32<<7 | 0x28, + 31983 - 19968: jis0208<<14 | 0x43<<7 | 0x58, + 31986 - 19968: jis0208<<14 | 0x43<<7 | 0x59, + 31988 - 19968: jis0208<<14 | 0x43<<7 | 0x5A, + 31989 - 19968: jis0212<<14 | 0x32<<7 | 0x29, + 31990 - 19968: jis0208<<14 | 0x43<<7 | 0x5B, + 31992 - 19968: jis0208<<14 | 0x1A<<7 | 0x44, + 31994 - 19968: jis0208<<14 | 0x43<<7 | 0x5C, + 31995 - 19968: jis0208<<14 | 0x16<<7 | 0x2E, + 31998 - 19968: jis0208<<14 | 0x14<<7 | 0x49, + 32000 - 19968: jis0208<<14 | 0x14<<7 | 0x09, + 32002 - 19968: jis0208<<14 | 0x44<<7 | 0x00, + 32003 - 19968: jis0212<<14 | 0x32<<7 | 0x2A, + 32004 - 19968: jis0208<<14 | 0x2B<<7 | 0x52, + 32005 - 19968: jis0208<<14 | 0x18<<7 | 0x27, + 32006 - 19968: jis0208<<14 | 0x43<<7 | 0x5D, + 32007 - 19968: jis0212<<14 | 0x32<<7 | 0x2B, + 32008 - 19968: jis0212<<14 | 0x32<<7 | 0x2C, + 32009 - 19968: jis0212<<14 | 0x32<<7 | 0x2D, + 32010 - 19968: jis0208<<14 | 0x44<<7 | 0x03, + 32011 - 19968: jis0208<<14 | 0x2B<<7 | 0x45, + 32013 - 19968: jis0208<<14 | 0x26<<7 | 0x1B, + 32015 - 19968: jis0212<<14 | 0x32<<7 | 0x2E, + 32016 - 19968: jis0208<<14 | 0x28<<7 | 0x12, + 32017 - 19968: jis0212<<14 | 0x32<<7 | 0x2F, + 32018 - 19968: jis0212<<14 | 0x32<<7 | 0x30, + 32019 - 19968: jis0212<<14 | 0x32<<7 | 0x31, + 32020 - 19968: jis0208<<14 | 0x1C<<7 | 0x42, + 32021 - 19968: jis0208<<14 | 0x44<<7 | 0x02, + 32022 - 19968: jis0212<<14 | 0x32<<7 | 0x32, + 32023 - 19968: jis0208<<14 | 0x1B<<7 | 0x32, + 32024 - 19968: jis0208<<14 | 0x18<<7 | 0x28, + 32025 - 19968: jis0208<<14 | 0x1A<<7 | 0x45, + 32026 - 19968: jis0208<<14 | 0x14<<7 | 0x48, + 32027 - 19968: jis0208<<14 | 0x29<<7 | 0x15, + 32028 - 19968: jis0208<<14 | 0x44<<7 | 0x01, + 32029 - 19968: jis0212<<14 | 0x32<<7 | 0x33, + 32030 - 19968: jis0212<<14 | 0x32<<7 | 0x34, + 32032 - 19968: jis0208<<14 | 0x20<<7 | 0x26, + 32033 - 19968: jis0208<<14 | 0x2A<<7 | 0x21, + 32034 - 19968: jis0208<<14 | 0x19<<7 | 0x56, + 32035 - 19968: jis0212<<14 | 0x32<<7 | 0x35, + 32038 - 19968: jis0212<<14 | 0x32<<7 | 0x36, + 32042 - 19968: jis0212<<14 | 0x32<<7 | 0x37, + 32043 - 19968: jis0208<<14 | 0x1A<<7 | 0x46, + 32044 - 19968: jis0208<<14 | 0x23<<7 | 0x3C, + 32045 - 19968: jis0212<<14 | 0x32<<7 | 0x38, + 32046 - 19968: jis0208<<14 | 0x44<<7 | 0x06, + 32047 - 19968: jis0208<<14 | 0x2D<<7 | 0x3E, + 32048 - 19968: jis0208<<14 | 0x19<<7 | 0x38, + 32049 - 19968: jis0212<<14 | 0x32<<7 | 0x39, + 32050 - 19968: jis0208<<14 | 0x44<<7 | 0x07, + 32051 - 19968: jis0208<<14 | 0x1E<<7 | 0x21, + 32053 - 19968: jis0208<<14 | 0x44<<7 | 0x09, + 32057 - 19968: jis0208<<14 | 0x1D<<7 | 0x31, + 32058 - 19968: jis0208<<14 | 0x19<<7 | 0x0F, + 32060 - 19968: jis0212<<14 | 0x32<<7 | 0x3A, + 32061 - 19968: jis0212<<14 | 0x32<<7 | 0x3B, + 32062 - 19968: jis0212<<14 | 0x32<<7 | 0x3C, + 32063 - 19968: jis0208<<14 | 0x44<<7 | 0x08, + 32064 - 19968: jis0212<<14 | 0x32<<7 | 0x3D, + 32065 - 19968: jis0212<<14 | 0x32<<7 | 0x3E, + 32066 - 19968: jis0208<<14 | 0x1C<<7 | 0x09, + 32067 - 19968: jis0208<<14 | 0x17<<7 | 0x1D, + 32068 - 19968: jis0208<<14 | 0x20<<7 | 0x27, + 32069 - 19968: jis0208<<14 | 0x44<<7 | 0x04, + 32070 - 19968: jis0208<<14 | 0x44<<7 | 0x0A, + 32071 - 19968: jis0212<<14 | 0x32<<7 | 0x3F, + 32072 - 19968: jis0208<<14 | 0x5A<<7 | 0x2D, + 32075 - 19968: jis0208<<14 | 0x44<<7 | 0x05, + 32076 - 19968: jis0208<<14 | 0x16<<7 | 0x2F, + 32077 - 19968: jis0212<<14 | 0x32<<7 | 0x41, + 32078 - 19968: jis0208<<14 | 0x44<<7 | 0x0D, + 32079 - 19968: jis0208<<14 | 0x44<<7 | 0x11, + 32080 - 19968: jis0208<<14 | 0x16<<7 | 0x4A, + 32081 - 19968: jis0212<<14 | 0x32<<7 | 0x42, + 32083 - 19968: jis0212<<14 | 0x32<<7 | 0x43, + 32086 - 19968: jis0208<<14 | 0x44<<7 | 0x0C, + 32087 - 19968: jis0212<<14 | 0x32<<7 | 0x44, + 32089 - 19968: jis0212<<14 | 0x32<<7 | 0x45, + 32090 - 19968: jis0212<<14 | 0x32<<7 | 0x46, + 32091 - 19968: jis0208<<14 | 0x44<<7 | 0x15, + 32092 - 19968: jis0208<<14 | 0x5A<<7 | 0x2E, + 32093 - 19968: jis0212<<14 | 0x32<<7 | 0x48, + 32094 - 19968: jis0208<<14 | 0x18<<7 | 0x29, + 32097 - 19968: jis0208<<14 | 0x2C<<7 | 0x4C, + 32098 - 19968: jis0208<<14 | 0x0F<<7 | 0x1B, + 32099 - 19968: jis0208<<14 | 0x44<<7 | 0x12, + 32101 - 19968: jis0212<<14 | 0x32<<7 | 0x49, + 32102 - 19968: jis0208<<14 | 0x14<<7 | 0x4A, + 32103 - 19968: jis0212<<14 | 0x32<<7 | 0x4A, + 32104 - 19968: jis0208<<14 | 0x44<<7 | 0x0F, + 32106 - 19968: jis0212<<14 | 0x32<<7 | 0x4B, + 32110 - 19968: jis0208<<14 | 0x44<<7 | 0x10, + 32112 - 19968: jis0212<<14 | 0x32<<7 | 0x4C, + 32113 - 19968: jis0208<<14 | 0x24<<7 | 0x5C, + 32114 - 19968: jis0208<<14 | 0x44<<7 | 0x0E, + 32115 - 19968: jis0208<<14 | 0x44<<7 | 0x0B, + 32117 - 19968: jis0208<<14 | 0x12<<7 | 0x07, + 32118 - 19968: jis0208<<14 | 0x1F<<7 | 0x43, + 32120 - 19968: jis0212<<14 | 0x32<<7 | 0x4D, + 32121 - 19968: jis0208<<14 | 0x17<<7 | 0x07, + 32122 - 19968: jis0212<<14 | 0x32<<7 | 0x4E, + 32123 - 19968: jis0212<<14 | 0x32<<7 | 0x4F, + 32125 - 19968: jis0208<<14 | 0x44<<7 | 0x17, + 32127 - 19968: jis0212<<14 | 0x32<<7 | 0x50, + 32129 - 19968: jis0212<<14 | 0x32<<7 | 0x51, + 32130 - 19968: jis0212<<14 | 0x32<<7 | 0x52, + 32131 - 19968: jis0212<<14 | 0x32<<7 | 0x53, + 32133 - 19968: jis0212<<14 | 0x32<<7 | 0x54, + 32134 - 19968: jis0212<<14 | 0x32<<7 | 0x55, + 32136 - 19968: jis0212<<14 | 0x32<<7 | 0x56, + 32137 - 19968: jis0208<<14 | 0x44<<7 | 0x14, + 32139 - 19968: jis0212<<14 | 0x32<<7 | 0x57, + 32140 - 19968: jis0212<<14 | 0x32<<7 | 0x58, + 32141 - 19968: jis0212<<14 | 0x32<<7 | 0x59, + 32143 - 19968: jis0208<<14 | 0x44<<7 | 0x16, + 32145 - 19968: jis0212<<14 | 0x32<<7 | 0x5A, + 32147 - 19968: jis0208<<14 | 0x44<<7 | 0x13, + 32150 - 19968: jis0212<<14 | 0x32<<7 | 0x5B, + 32151 - 19968: jis0212<<14 | 0x32<<7 | 0x5C, + 32153 - 19968: jis0208<<14 | 0x16<<7 | 0x30, + 32154 - 19968: jis0208<<14 | 0x21<<7 | 0x12, + 32155 - 19968: jis0208<<14 | 0x44<<7 | 0x18, + 32156 - 19968: jis0208<<14 | 0x20<<7 | 0x4D, + 32157 - 19968: jis0212<<14 | 0x32<<7 | 0x5D, + 32158 - 19968: jis0212<<14 | 0x33<<7 | 0x00, + 32159 - 19968: jis0208<<14 | 0x44<<7 | 0x25, + 32160 - 19968: jis0208<<14 | 0x5A<<7 | 0x30, + 32162 - 19968: jis0208<<14 | 0x44<<7 | 0x21, + 32163 - 19968: jis0208<<14 | 0x44<<7 | 0x1B, + 32166 - 19968: jis0212<<14 | 0x33<<7 | 0x01, + 32167 - 19968: jis0212<<14 | 0x33<<7 | 0x02, + 32170 - 19968: jis0212<<14 | 0x33<<7 | 0x03, + 32171 - 19968: jis0208<<14 | 0x44<<7 | 0x1F, + 32172 - 19968: jis0208<<14 | 0x1B<<7 | 0x59, + 32173 - 19968: jis0208<<14 | 0x0F<<7 | 0x3C, + 32174 - 19968: jis0208<<14 | 0x44<<7 | 0x1A, + 32175 - 19968: jis0208<<14 | 0x44<<7 | 0x22, + 32176 - 19968: jis0208<<14 | 0x44<<7 | 0x26, + 32177 - 19968: jis0208<<14 | 0x18<<7 | 0x2A, + 32178 - 19968: jis0208<<14 | 0x2B<<7 | 0x35, + 32179 - 19968: jis0212<<14 | 0x33<<7 | 0x04, + 32180 - 19968: jis0208<<14 | 0x23<<7 | 0x35, + 32181 - 19968: jis0208<<14 | 0x44<<7 | 0x1C, + 32182 - 19968: jis0212<<14 | 0x33<<7 | 0x05, + 32183 - 19968: jis0208<<14 | 0x5A<<7 | 0x2F, + 32184 - 19968: jis0208<<14 | 0x44<<7 | 0x24, + 32185 - 19968: jis0212<<14 | 0x33<<7 | 0x07, + 32186 - 19968: jis0208<<14 | 0x44<<7 | 0x19, + 32187 - 19968: jis0208<<14 | 0x22<<7 | 0x1D, + 32189 - 19968: jis0208<<14 | 0x44<<7 | 0x1E, + 32190 - 19968: jis0208<<14 | 0x0F<<7 | 0x1C, + 32191 - 19968: jis0208<<14 | 0x2B<<7 | 0x29, + 32194 - 19968: jis0212<<14 | 0x33<<7 | 0x08, + 32195 - 19968: jis0212<<14 | 0x33<<7 | 0x09, + 32196 - 19968: jis0212<<14 | 0x33<<7 | 0x0A, + 32197 - 19968: jis0212<<14 | 0x33<<7 | 0x0B, + 32198 - 19968: jis0212<<14 | 0x33<<7 | 0x0C, + 32199 - 19968: jis0208<<14 | 0x44<<7 | 0x1D, + 32202 - 19968: jis0208<<14 | 0x15<<7 | 0x3A, + 32203 - 19968: jis0208<<14 | 0x27<<7 | 0x4B, + 32204 - 19968: jis0212<<14 | 0x33<<7 | 0x0D, + 32205 - 19968: jis0212<<14 | 0x33<<7 | 0x0E, + 32206 - 19968: jis0212<<14 | 0x33<<7 | 0x0F, + 32207 - 19968: jis0208<<14 | 0x20<<7 | 0x4C, + 32209 - 19968: jis0208<<14 | 0x2D<<7 | 0x2F, + 32210 - 19968: jis0208<<14 | 0x1C<<7 | 0x4E, + 32213 - 19968: jis0208<<14 | 0x44<<7 | 0x4D, + 32214 - 19968: jis0208<<14 | 0x5A<<7 | 0x31, + 32215 - 19968: jis0212<<14 | 0x33<<7 | 0x10, + 32216 - 19968: jis0208<<14 | 0x44<<7 | 0x27, + 32217 - 19968: jis0212<<14 | 0x33<<7 | 0x11, + 32218 - 19968: jis0208<<14 | 0x1F<<7 | 0x5D, + 32220 - 19968: jis0208<<14 | 0x44<<7 | 0x23, + 32221 - 19968: jis0208<<14 | 0x44<<7 | 0x28, + 32222 - 19968: jis0208<<14 | 0x44<<7 | 0x2A, + 32224 - 19968: jis0208<<14 | 0x23<<7 | 0x58, + 32225 - 19968: jis0208<<14 | 0x44<<7 | 0x2D, + 32226 - 19968: jis0212<<14 | 0x33<<7 | 0x13, + 32228 - 19968: jis0208<<14 | 0x44<<7 | 0x29, + 32229 - 19968: jis0212<<14 | 0x33<<7 | 0x14, + 32230 - 19968: jis0212<<14 | 0x33<<7 | 0x15, + 32232 - 19968: jis0208<<14 | 0x29<<7 | 0x33, + 32233 - 19968: jis0208<<14 | 0x13<<7 | 0x2A, + 32234 - 19968: jis0212<<14 | 0x33<<7 | 0x16, + 32235 - 19968: jis0212<<14 | 0x33<<7 | 0x17, + 32236 - 19968: jis0208<<14 | 0x2B<<7 | 0x2A, + 32237 - 19968: jis0212<<14 | 0x33<<7 | 0x18, + 32239 - 19968: jis0208<<14 | 0x0F<<7 | 0x3D, + 32241 - 19968: jis0212<<14 | 0x33<<7 | 0x19, + 32242 - 19968: jis0208<<14 | 0x44<<7 | 0x2C, + 32244 - 19968: jis0208<<14 | 0x2D<<7 | 0x5C, + 32245 - 19968: jis0212<<14 | 0x33<<7 | 0x1A, + 32246 - 19968: jis0212<<14 | 0x33<<7 | 0x1B, + 32249 - 19968: jis0212<<14 | 0x33<<7 | 0x1C, + 32250 - 19968: jis0212<<14 | 0x33<<7 | 0x1D, + 32251 - 19968: jis0208<<14 | 0x44<<7 | 0x2B, + 32256 - 19968: jis0212<<14 | 0x33<<7 | 0x12, + 32257 - 19968: jis0208<<14 | 0x10<<7 | 0x4E, + 32260 - 19968: jis0208<<14 | 0x25<<7 | 0x4B, + 32261 - 19968: jis0208<<14 | 0x44<<7 | 0x2E, + 32264 - 19968: jis0212<<14 | 0x33<<7 | 0x1E, + 32265 - 19968: jis0208<<14 | 0x44<<7 | 0x35, + 32266 - 19968: jis0208<<14 | 0x44<<7 | 0x2F, + 32267 - 19968: jis0208<<14 | 0x44<<7 | 0x36, + 32272 - 19968: jis0212<<14 | 0x33<<7 | 0x1F, + 32273 - 19968: jis0212<<14 | 0x33<<7 | 0x20, + 32274 - 19968: jis0208<<14 | 0x44<<7 | 0x32, + 32277 - 19968: jis0212<<14 | 0x33<<7 | 0x21, + 32279 - 19968: jis0212<<14 | 0x33<<7 | 0x22, + 32283 - 19968: jis0208<<14 | 0x26<<7 | 0x5A, + 32284 - 19968: jis0212<<14 | 0x33<<7 | 0x23, + 32285 - 19968: jis0212<<14 | 0x33<<7 | 0x24, + 32286 - 19968: jis0208<<14 | 0x1B<<7 | 0x29, + 32287 - 19968: jis0208<<14 | 0x44<<7 | 0x34, + 32288 - 19968: jis0212<<14 | 0x33<<7 | 0x25, + 32289 - 19968: jis0208<<14 | 0x44<<7 | 0x31, + 32290 - 19968: jis0208<<14 | 0x44<<7 | 0x37, + 32291 - 19968: jis0208<<14 | 0x44<<7 | 0x30, + 32294 - 19968: jis0208<<14 | 0x1C<<7 | 0x23, + 32295 - 19968: jis0212<<14 | 0x33<<7 | 0x26, + 32296 - 19968: jis0212<<14 | 0x33<<7 | 0x27, + 32299 - 19968: jis0208<<14 | 0x2A<<7 | 0x04, + 32300 - 19968: jis0212<<14 | 0x33<<7 | 0x28, + 32301 - 19968: jis0212<<14 | 0x33<<7 | 0x29, + 32302 - 19968: jis0208<<14 | 0x1C<<7 | 0x2B, + 32303 - 19968: jis0212<<14 | 0x33<<7 | 0x2A, + 32305 - 19968: jis0208<<14 | 0x44<<7 | 0x33, + 32306 - 19968: jis0208<<14 | 0x44<<7 | 0x3F, + 32307 - 19968: jis0212<<14 | 0x33<<7 | 0x2B, + 32309 - 19968: jis0208<<14 | 0x44<<7 | 0x3B, + 32310 - 19968: jis0212<<14 | 0x33<<7 | 0x2C, + 32311 - 19968: jis0208<<14 | 0x44<<7 | 0x3E, + 32313 - 19968: jis0208<<14 | 0x44<<7 | 0x3C, + 32314 - 19968: jis0208<<14 | 0x44<<7 | 0x40, + 32315 - 19968: jis0208<<14 | 0x44<<7 | 0x3A, + 32317 - 19968: jis0208<<14 | 0x44<<7 | 0x20, + 32318 - 19968: jis0208<<14 | 0x1F<<7 | 0x32, + 32319 - 19968: jis0212<<14 | 0x33<<7 | 0x2D, + 32321 - 19968: jis0208<<14 | 0x27<<7 | 0x2A, + 32323 - 19968: jis0208<<14 | 0x44<<7 | 0x3D, + 32324 - 19968: jis0212<<14 | 0x33<<7 | 0x2E, + 32325 - 19968: jis0212<<14 | 0x33<<7 | 0x2F, + 32326 - 19968: jis0208<<14 | 0x44<<7 | 0x38, + 32327 - 19968: jis0212<<14 | 0x33<<7 | 0x30, + 32330 - 19968: jis0208<<14 | 0x20<<7 | 0x00, + 32331 - 19968: jis0208<<14 | 0x16<<7 | 0x31, + 32333 - 19968: jis0208<<14 | 0x1C<<7 | 0x0A, + 32334 - 19968: jis0212<<14 | 0x33<<7 | 0x31, + 32336 - 19968: jis0212<<14 | 0x33<<7 | 0x32, + 32338 - 19968: jis0208<<14 | 0x5A<<7 | 0x32, + 32340 - 19968: jis0208<<14 | 0x1E<<7 | 0x04, + 32341 - 19968: jis0208<<14 | 0x20<<7 | 0x15, + 32342 - 19968: jis0208<<14 | 0x44<<7 | 0x43, + 32344 - 19968: jis0212<<14 | 0x33<<7 | 0x34, + 32345 - 19968: jis0208<<14 | 0x44<<7 | 0x45, + 32346 - 19968: jis0208<<14 | 0x44<<7 | 0x46, + 32349 - 19968: jis0208<<14 | 0x44<<7 | 0x42, + 32350 - 19968: jis0208<<14 | 0x44<<7 | 0x44, + 32351 - 19968: jis0212<<14 | 0x33<<7 | 0x35, + 32353 - 19968: jis0212<<14 | 0x33<<7 | 0x36, + 32354 - 19968: jis0212<<14 | 0x33<<7 | 0x37, + 32357 - 19968: jis0212<<14 | 0x33<<7 | 0x38, + 32358 - 19968: jis0208<<14 | 0x44<<7 | 0x39, + 32359 - 19968: jis0208<<14 | 0x44<<7 | 0x41, + 32361 - 19968: jis0208<<14 | 0x44<<7 | 0x49, + 32362 - 19968: jis0208<<14 | 0x44<<7 | 0x48, + 32363 - 19968: jis0212<<14 | 0x33<<7 | 0x39, + 32365 - 19968: jis0208<<14 | 0x2A<<7 | 0x59, + 32366 - 19968: jis0212<<14 | 0x33<<7 | 0x3A, + 32367 - 19968: jis0212<<14 | 0x33<<7 | 0x3B, + 32368 - 19968: jis0208<<14 | 0x16<<7 | 0x0A, + 32371 - 19968: jis0212<<14 | 0x33<<7 | 0x3C, + 32376 - 19968: jis0212<<14 | 0x33<<7 | 0x3D, + 32377 - 19968: jis0208<<14 | 0x44<<7 | 0x47, + 32379 - 19968: jis0208<<14 | 0x44<<7 | 0x4B, + 32380 - 19968: jis0208<<14 | 0x44<<7 | 0x4A, + 32381 - 19968: jis0208<<14 | 0x44<<7 | 0x4E, + 32382 - 19968: jis0212<<14 | 0x33<<7 | 0x3E, + 32383 - 19968: jis0208<<14 | 0x44<<7 | 0x50, + 32385 - 19968: jis0212<<14 | 0x33<<7 | 0x3F, + 32386 - 19968: jis0208<<14 | 0x1A<<7 | 0x1B, + 32387 - 19968: jis0208<<14 | 0x44<<7 | 0x4C, + 32390 - 19968: jis0212<<14 | 0x33<<7 | 0x40, + 32391 - 19968: jis0212<<14 | 0x33<<7 | 0x41, + 32392 - 19968: jis0208<<14 | 0x44<<7 | 0x51, + 32393 - 19968: jis0208<<14 | 0x44<<7 | 0x52, + 32394 - 19968: jis0208<<14 | 0x58<<7 | 0x00, + 32396 - 19968: jis0208<<14 | 0x44<<7 | 0x53, + 32397 - 19968: jis0212<<14 | 0x33<<7 | 0x43, + 32398 - 19968: jis0208<<14 | 0x44<<7 | 0x59, + 32399 - 19968: jis0208<<14 | 0x24<<7 | 0x1A, + 32400 - 19968: jis0208<<14 | 0x44<<7 | 0x55, + 32401 - 19968: jis0212<<14 | 0x33<<7 | 0x44, + 32402 - 19968: jis0208<<14 | 0x44<<7 | 0x54, + 32403 - 19968: jis0208<<14 | 0x44<<7 | 0x56, + 32404 - 19968: jis0208<<14 | 0x44<<7 | 0x57, + 32405 - 19968: jis0212<<14 | 0x33<<7 | 0x45, + 32406 - 19968: jis0208<<14 | 0x44<<7 | 0x58, + 32408 - 19968: jis0212<<14 | 0x33<<7 | 0x46, + 32410 - 19968: jis0212<<14 | 0x33<<7 | 0x47, + 32411 - 19968: jis0208<<14 | 0x44<<7 | 0x5A, + 32412 - 19968: jis0208<<14 | 0x44<<7 | 0x5B, + 32413 - 19968: jis0212<<14 | 0x33<<7 | 0x48, + 32414 - 19968: jis0212<<14 | 0x33<<7 | 0x49, + 32566 - 19968: jis0208<<14 | 0x13<<7 | 0x2B, + 32568 - 19968: jis0208<<14 | 0x44<<7 | 0x5C, + 32570 - 19968: jis0208<<14 | 0x44<<7 | 0x5D, + 32571 - 19968: jis0212<<14 | 0x33<<7 | 0x4B, + 32572 - 19968: jis0212<<14 | 0x33<<7 | 0x4A, + 32573 - 19968: jis0212<<14 | 0x33<<7 | 0x4C, + 32574 - 19968: jis0212<<14 | 0x33<<7 | 0x4D, + 32575 - 19968: jis0212<<14 | 0x33<<7 | 0x4E, + 32579 - 19968: jis0212<<14 | 0x33<<7 | 0x4F, + 32580 - 19968: jis0212<<14 | 0x33<<7 | 0x50, + 32581 - 19968: jis0208<<14 | 0x45<<7 | 0x00, + 32583 - 19968: jis0208<<14 | 0x5A<<7 | 0x33, + 32588 - 19968: jis0208<<14 | 0x45<<7 | 0x01, + 32589 - 19968: jis0208<<14 | 0x45<<7 | 0x02, + 32590 - 19968: jis0208<<14 | 0x45<<7 | 0x03, + 32591 - 19968: jis0212<<14 | 0x33<<7 | 0x52, + 32592 - 19968: jis0208<<14 | 0x45<<7 | 0x04, + 32593 - 19968: jis0208<<14 | 0x45<<7 | 0x05, + 32594 - 19968: jis0212<<14 | 0x33<<7 | 0x53, + 32595 - 19968: jis0212<<14 | 0x33<<7 | 0x54, + 32596 - 19968: jis0208<<14 | 0x45<<7 | 0x07, + 32597 - 19968: jis0208<<14 | 0x45<<7 | 0x06, + 32600 - 19968: jis0208<<14 | 0x45<<7 | 0x08, + 32603 - 19968: jis0212<<14 | 0x33<<7 | 0x55, + 32604 - 19968: jis0212<<14 | 0x33<<7 | 0x56, + 32605 - 19968: jis0212<<14 | 0x33<<7 | 0x57, + 32607 - 19968: jis0208<<14 | 0x45<<7 | 0x09, + 32608 - 19968: jis0208<<14 | 0x45<<7 | 0x0A, + 32609 - 19968: jis0212<<14 | 0x33<<7 | 0x58, + 32611 - 19968: jis0212<<14 | 0x33<<7 | 0x59, + 32612 - 19968: jis0212<<14 | 0x33<<7 | 0x5A, + 32613 - 19968: jis0212<<14 | 0x33<<7 | 0x5B, + 32614 - 19968: jis0212<<14 | 0x33<<7 | 0x5C, + 32615 - 19968: jis0208<<14 | 0x45<<7 | 0x0D, + 32616 - 19968: jis0208<<14 | 0x45<<7 | 0x0B, + 32617 - 19968: jis0208<<14 | 0x45<<7 | 0x0C, + 32618 - 19968: jis0208<<14 | 0x19<<7 | 0x40, + 32619 - 19968: jis0208<<14 | 0x16<<7 | 0x32, + 32621 - 19968: jis0212<<14 | 0x33<<7 | 0x5D, + 32622 - 19968: jis0208<<14 | 0x22<<7 | 0x35, + 32624 - 19968: jis0208<<14 | 0x27<<7 | 0x12, + 32625 - 19968: jis0212<<14 | 0x34<<7 | 0x00, + 32626 - 19968: jis0208<<14 | 0x1C<<7 | 0x4F, + 32629 - 19968: jis0208<<14 | 0x26<<7 | 0x2C, + 32631 - 19968: jis0208<<14 | 0x27<<7 | 0x4C, + 32632 - 19968: jis0208<<14 | 0x45<<7 | 0x0E, + 32633 - 19968: jis0208<<14 | 0x37<<7 | 0x4C, + 32637 - 19968: jis0212<<14 | 0x34<<7 | 0x01, + 32638 - 19968: jis0212<<14 | 0x34<<7 | 0x02, + 32639 - 19968: jis0212<<14 | 0x34<<7 | 0x03, + 32640 - 19968: jis0212<<14 | 0x34<<7 | 0x04, + 32642 - 19968: jis0208<<14 | 0x45<<7 | 0x0F, + 32643 - 19968: jis0208<<14 | 0x45<<7 | 0x11, + 32645 - 19968: jis0208<<14 | 0x2C<<7 | 0x44, + 32646 - 19968: jis0208<<14 | 0x45<<7 | 0x10, + 32647 - 19968: jis0208<<14 | 0x45<<7 | 0x13, + 32648 - 19968: jis0208<<14 | 0x45<<7 | 0x12, + 32650 - 19968: jis0208<<14 | 0x2C<<7 | 0x32, + 32651 - 19968: jis0212<<14 | 0x34<<7 | 0x05, + 32652 - 19968: jis0208<<14 | 0x45<<7 | 0x14, + 32653 - 19968: jis0212<<14 | 0x34<<7 | 0x06, + 32654 - 19968: jis0208<<14 | 0x27<<7 | 0x5D, + 32655 - 19968: jis0212<<14 | 0x34<<7 | 0x07, + 32656 - 19968: jis0212<<14 | 0x34<<7 | 0x08, + 32657 - 19968: jis0212<<14 | 0x34<<7 | 0x09, + 32660 - 19968: jis0208<<14 | 0x45<<7 | 0x15, + 32662 - 19968: jis0212<<14 | 0x34<<7 | 0x0A, + 32663 - 19968: jis0212<<14 | 0x34<<7 | 0x0B, + 32666 - 19968: jis0208<<14 | 0x45<<7 | 0x18, + 32668 - 19968: jis0212<<14 | 0x34<<7 | 0x0C, + 32669 - 19968: jis0208<<14 | 0x45<<7 | 0x17, + 32670 - 19968: jis0208<<14 | 0x45<<7 | 0x16, + 32673 - 19968: jis0208<<14 | 0x5A<<7 | 0x34, + 32674 - 19968: jis0212<<14 | 0x34<<7 | 0x0E, + 32675 - 19968: jis0208<<14 | 0x45<<7 | 0x19, + 32676 - 19968: jis0208<<14 | 0x16<<7 | 0x11, + 32678 - 19968: jis0212<<14 | 0x34<<7 | 0x0F, + 32680 - 19968: jis0208<<14 | 0x20<<7 | 0x01, + 32681 - 19968: jis0208<<14 | 0x14<<7 | 0x20, + 32682 - 19968: jis0212<<14 | 0x34<<7 | 0x10, + 32685 - 19968: jis0212<<14 | 0x34<<7 | 0x11, + 32686 - 19968: jis0208<<14 | 0x45<<7 | 0x1D, + 32687 - 19968: jis0208<<14 | 0x45<<7 | 0x1A, + 32690 - 19968: jis0208<<14 | 0x45<<7 | 0x1B, + 32692 - 19968: jis0212<<14 | 0x34<<7 | 0x12, + 32694 - 19968: jis0208<<14 | 0x45<<7 | 0x1E, + 32696 - 19968: jis0208<<14 | 0x45<<7 | 0x1F, + 32697 - 19968: jis0208<<14 | 0x45<<7 | 0x1C, + 32700 - 19968: jis0212<<14 | 0x34<<7 | 0x13, + 32701 - 19968: jis0208<<14 | 0x10<<7 | 0x08, + 32703 - 19968: jis0212<<14 | 0x34<<7 | 0x14, + 32704 - 19968: jis0212<<14 | 0x34<<7 | 0x15, + 32705 - 19968: jis0208<<14 | 0x11<<7 | 0x06, + 32707 - 19968: jis0212<<14 | 0x34<<7 | 0x16, + 32709 - 19968: jis0208<<14 | 0x45<<7 | 0x21, + 32710 - 19968: jis0208<<14 | 0x45<<7 | 0x22, + 32712 - 19968: jis0212<<14 | 0x34<<7 | 0x17, + 32714 - 19968: jis0208<<14 | 0x45<<7 | 0x23, + 32716 - 19968: jis0208<<14 | 0x2C<<7 | 0x41, + 32718 - 19968: jis0212<<14 | 0x34<<7 | 0x18, + 32719 - 19968: jis0212<<14 | 0x34<<7 | 0x19, + 32722 - 19968: jis0208<<14 | 0x1C<<7 | 0x0B, + 32724 - 19968: jis0208<<14 | 0x45<<7 | 0x25, + 32725 - 19968: jis0208<<14 | 0x45<<7 | 0x24, + 32731 - 19968: jis0212<<14 | 0x34<<7 | 0x1A, + 32735 - 19968: jis0212<<14 | 0x34<<7 | 0x1B, + 32736 - 19968: jis0208<<14 | 0x1E<<7 | 0x48, + 32737 - 19968: jis0208<<14 | 0x45<<7 | 0x26, + 32739 - 19968: jis0212<<14 | 0x34<<7 | 0x1C, + 32741 - 19968: jis0212<<14 | 0x34<<7 | 0x1D, + 32742 - 19968: jis0208<<14 | 0x45<<7 | 0x27, + 32744 - 19968: jis0212<<14 | 0x34<<7 | 0x1E, + 32745 - 19968: jis0208<<14 | 0x45<<7 | 0x28, + 32747 - 19968: jis0208<<14 | 0x13<<7 | 0x44, + 32748 - 19968: jis0212<<14 | 0x34<<7 | 0x1F, + 32750 - 19968: jis0212<<14 | 0x34<<7 | 0x20, + 32751 - 19968: jis0212<<14 | 0x34<<7 | 0x21, + 32752 - 19968: jis0208<<14 | 0x13<<7 | 0x2C, + 32754 - 19968: jis0212<<14 | 0x34<<7 | 0x22, + 32755 - 19968: jis0208<<14 | 0x45<<7 | 0x29, + 32761 - 19968: jis0208<<14 | 0x45<<7 | 0x2A, + 32762 - 19968: jis0212<<14 | 0x34<<7 | 0x23, + 32763 - 19968: jis0208<<14 | 0x2A<<7 | 0x3C, + 32764 - 19968: jis0208<<14 | 0x2C<<7 | 0x42, + 32765 - 19968: jis0212<<14 | 0x34<<7 | 0x24, + 32766 - 19968: jis0212<<14 | 0x34<<7 | 0x25, + 32767 - 19968: jis0212<<14 | 0x34<<7 | 0x26, + 32768 - 19968: jis0208<<14 | 0x2C<<7 | 0x33, + 32769 - 19968: jis0208<<14 | 0x2E<<7 | 0x16, + 32771 - 19968: jis0208<<14 | 0x18<<7 | 0x2C, + 32772 - 19968: jis0208<<14 | 0x45<<7 | 0x2D, + 32773 - 19968: jis0208<<14 | 0x1B<<7 | 0x33, + 32774 - 19968: jis0208<<14 | 0x45<<7 | 0x2C, + 32775 - 19968: jis0212<<14 | 0x34<<7 | 0x27, + 32776 - 19968: jis0212<<14 | 0x34<<7 | 0x28, + 32778 - 19968: jis0212<<14 | 0x34<<7 | 0x29, + 32779 - 19968: jis0208<<14 | 0x45<<7 | 0x2E, + 32780 - 19968: jis0208<<14 | 0x1B<<7 | 0x08, + 32781 - 19968: jis0212<<14 | 0x34<<7 | 0x2A, + 32782 - 19968: jis0212<<14 | 0x34<<7 | 0x2B, + 32783 - 19968: jis0212<<14 | 0x34<<7 | 0x2C, + 32784 - 19968: jis0208<<14 | 0x21<<7 | 0x30, + 32785 - 19968: jis0212<<14 | 0x34<<7 | 0x2D, + 32786 - 19968: jis0208<<14 | 0x45<<7 | 0x2F, + 32787 - 19968: jis0212<<14 | 0x34<<7 | 0x2E, + 32788 - 19968: jis0212<<14 | 0x34<<7 | 0x2F, + 32789 - 19968: jis0208<<14 | 0x18<<7 | 0x2B, + 32790 - 19968: jis0212<<14 | 0x34<<7 | 0x30, + 32791 - 19968: jis0208<<14 | 0x2B<<7 | 0x36, + 32792 - 19968: jis0208<<14 | 0x45<<7 | 0x30, + 32793 - 19968: jis0208<<14 | 0x45<<7 | 0x31, + 32796 - 19968: jis0208<<14 | 0x45<<7 | 0x32, + 32797 - 19968: jis0212<<14 | 0x34<<7 | 0x31, + 32798 - 19968: jis0212<<14 | 0x34<<7 | 0x32, + 32799 - 19968: jis0212<<14 | 0x34<<7 | 0x33, + 32800 - 19968: jis0212<<14 | 0x34<<7 | 0x34, + 32801 - 19968: jis0208<<14 | 0x45<<7 | 0x33, + 32804 - 19968: jis0212<<14 | 0x34<<7 | 0x35, + 32806 - 19968: jis0212<<14 | 0x34<<7 | 0x36, + 32808 - 19968: jis0208<<14 | 0x45<<7 | 0x34, + 32812 - 19968: jis0212<<14 | 0x34<<7 | 0x37, + 32814 - 19968: jis0212<<14 | 0x34<<7 | 0x38, + 32816 - 19968: jis0212<<14 | 0x34<<7 | 0x39, + 32819 - 19968: jis0208<<14 | 0x1B<<7 | 0x09, + 32820 - 19968: jis0212<<14 | 0x34<<7 | 0x3A, + 32821 - 19968: jis0212<<14 | 0x34<<7 | 0x3B, + 32822 - 19968: jis0208<<14 | 0x2B<<7 | 0x4C, + 32823 - 19968: jis0212<<14 | 0x34<<7 | 0x3C, + 32825 - 19968: jis0212<<14 | 0x34<<7 | 0x3D, + 32826 - 19968: jis0212<<14 | 0x34<<7 | 0x3E, + 32827 - 19968: jis0208<<14 | 0x45<<7 | 0x36, + 32828 - 19968: jis0212<<14 | 0x34<<7 | 0x3F, + 32829 - 19968: jis0208<<14 | 0x22<<7 | 0x1E, + 32830 - 19968: jis0212<<14 | 0x34<<7 | 0x40, + 32831 - 19968: jis0208<<14 | 0x45<<7 | 0x35, + 32832 - 19968: jis0212<<14 | 0x34<<7 | 0x41, + 32836 - 19968: jis0212<<14 | 0x34<<7 | 0x42, + 32838 - 19968: jis0208<<14 | 0x45<<7 | 0x38, + 32842 - 19968: jis0208<<14 | 0x45<<7 | 0x37, + 32850 - 19968: jis0208<<14 | 0x45<<7 | 0x39, + 32854 - 19968: jis0208<<14 | 0x1F<<7 | 0x1A, + 32856 - 19968: jis0208<<14 | 0x45<<7 | 0x3A, + 32858 - 19968: jis0208<<14 | 0x45<<7 | 0x3B, + 32862 - 19968: jis0208<<14 | 0x29<<7 | 0x18, + 32863 - 19968: jis0208<<14 | 0x45<<7 | 0x3C, + 32864 - 19968: jis0212<<14 | 0x34<<7 | 0x43, + 32865 - 19968: jis0208<<14 | 0x20<<7 | 0x4E, + 32866 - 19968: jis0208<<14 | 0x45<<7 | 0x3D, + 32868 - 19968: jis0212<<14 | 0x34<<7 | 0x44, + 32870 - 19968: jis0212<<14 | 0x34<<7 | 0x45, + 32872 - 19968: jis0208<<14 | 0x45<<7 | 0x3E, + 32877 - 19968: jis0212<<14 | 0x34<<7 | 0x46, + 32879 - 19968: jis0208<<14 | 0x2D<<7 | 0x5D, + 32880 - 19968: jis0208<<14 | 0x45<<7 | 0x41, + 32881 - 19968: jis0212<<14 | 0x34<<7 | 0x47, + 32882 - 19968: jis0208<<14 | 0x45<<7 | 0x40, + 32883 - 19968: jis0208<<14 | 0x45<<7 | 0x3F, + 32884 - 19968: jis0208<<14 | 0x23<<7 | 0x0F, + 32885 - 19968: jis0212<<14 | 0x34<<7 | 0x48, + 32886 - 19968: jis0208<<14 | 0x45<<7 | 0x42, + 32887 - 19968: jis0208<<14 | 0x1E<<7 | 0x05, + 32889 - 19968: jis0208<<14 | 0x45<<7 | 0x43, + 32893 - 19968: jis0208<<14 | 0x45<<7 | 0x44, + 32894 - 19968: jis0208<<14 | 0x2E<<7 | 0x17, + 32895 - 19968: jis0208<<14 | 0x45<<7 | 0x45, + 32897 - 19968: jis0212<<14 | 0x34<<7 | 0x49, + 32900 - 19968: jis0208<<14 | 0x45<<7 | 0x46, + 32901 - 19968: jis0208<<14 | 0x45<<7 | 0x48, + 32902 - 19968: jis0208<<14 | 0x45<<7 | 0x47, + 32903 - 19968: jis0208<<14 | 0x27<<7 | 0x04, + 32904 - 19968: jis0212<<14 | 0x34<<7 | 0x4A, + 32905 - 19968: jis0208<<14 | 0x25<<7 | 0x58, + 32907 - 19968: jis0208<<14 | 0x2E<<7 | 0x1D, + 32908 - 19968: jis0208<<14 | 0x27<<7 | 0x08, + 32910 - 19968: jis0212<<14 | 0x34<<7 | 0x4B, + 32915 - 19968: jis0208<<14 | 0x45<<7 | 0x4A, + 32918 - 19968: jis0208<<14 | 0x1D<<7 | 0x32, + 32920 - 19968: jis0208<<14 | 0x28<<7 | 0x09, + 32922 - 19968: jis0208<<14 | 0x45<<7 | 0x4B, + 32923 - 19968: jis0208<<14 | 0x45<<7 | 0x49, + 32924 - 19968: jis0212<<14 | 0x34<<7 | 0x4C, + 32925 - 19968: jis0208<<14 | 0x13<<7 | 0x2D, + 32926 - 19968: jis0212<<14 | 0x34<<7 | 0x4D, + 32929 - 19968: jis0208<<14 | 0x17<<7 | 0x33, + 32930 - 19968: jis0208<<14 | 0x1A<<7 | 0x47, + 32933 - 19968: jis0208<<14 | 0x27<<7 | 0x4D, + 32934 - 19968: jis0212<<14 | 0x34<<7 | 0x4E, + 32935 - 19968: jis0212<<14 | 0x34<<7 | 0x4F, + 32937 - 19968: jis0208<<14 | 0x17<<7 | 0x09, + 32938 - 19968: jis0208<<14 | 0x2A<<7 | 0x22, + 32939 - 19968: jis0212<<14 | 0x34<<7 | 0x50, + 32940 - 19968: jis0208<<14 | 0x45<<7 | 0x4E, + 32941 - 19968: jis0208<<14 | 0x45<<7 | 0x4C, + 32943 - 19968: jis0208<<14 | 0x18<<7 | 0x2D, + 32945 - 19968: jis0208<<14 | 0x18<<7 | 0x2E, + 32946 - 19968: jis0208<<14 | 0x0F<<7 | 0x48, + 32948 - 19968: jis0208<<14 | 0x19<<7 | 0x47, + 32952 - 19968: jis0212<<14 | 0x34<<7 | 0x51, + 32953 - 19968: jis0212<<14 | 0x34<<7 | 0x52, + 32954 - 19968: jis0208<<14 | 0x26<<7 | 0x38, + 32963 - 19968: jis0208<<14 | 0x0F<<7 | 0x3E, + 32964 - 19968: jis0208<<14 | 0x45<<7 | 0x53, + 32966 - 19968: jis0208<<14 | 0x22<<7 | 0x1F, + 32968 - 19968: jis0212<<14 | 0x34<<7 | 0x53, + 32972 - 19968: jis0208<<14 | 0x26<<7 | 0x37, + 32973 - 19968: jis0212<<14 | 0x34<<7 | 0x54, + 32974 - 19968: jis0208<<14 | 0x21<<7 | 0x3A, + 32975 - 19968: jis0212<<14 | 0x34<<7 | 0x55, + 32978 - 19968: jis0212<<14 | 0x34<<7 | 0x56, + 32980 - 19968: jis0212<<14 | 0x34<<7 | 0x57, + 32981 - 19968: jis0212<<14 | 0x34<<7 | 0x58, + 32982 - 19968: jis0208<<14 | 0x45<<7 | 0x55, + 32983 - 19968: jis0212<<14 | 0x34<<7 | 0x59, + 32984 - 19968: jis0212<<14 | 0x34<<7 | 0x5A, + 32985 - 19968: jis0208<<14 | 0x45<<7 | 0x51, + 32986 - 19968: jis0208<<14 | 0x45<<7 | 0x54, + 32987 - 19968: jis0208<<14 | 0x45<<7 | 0x4F, + 32989 - 19968: jis0208<<14 | 0x45<<7 | 0x52, + 32990 - 19968: jis0208<<14 | 0x2A<<7 | 0x05, + 32992 - 19968: jis0212<<14 | 0x34<<7 | 0x5B, + 32993 - 19968: jis0208<<14 | 0x17<<7 | 0x34, + 32996 - 19968: jis0208<<14 | 0x0F<<7 | 0x5C, + 32997 - 19968: jis0208<<14 | 0x45<<7 | 0x50, + 33005 - 19968: jis0212<<14 | 0x34<<7 | 0x5C, + 33006 - 19968: jis0212<<14 | 0x34<<7 | 0x5D, + 33007 - 19968: jis0208<<14 | 0x45<<7 | 0x57, + 33008 - 19968: jis0212<<14 | 0x35<<7 | 0x00, + 33009 - 19968: jis0208<<14 | 0x45<<7 | 0x58, + 33010 - 19968: jis0212<<14 | 0x35<<7 | 0x01, + 33011 - 19968: jis0212<<14 | 0x35<<7 | 0x02, + 33012 - 19968: jis0208<<14 | 0x25<<7 | 0x18, + 33014 - 19968: jis0212<<14 | 0x35<<7 | 0x03, + 33016 - 19968: jis0208<<14 | 0x15<<7 | 0x1A, + 33017 - 19968: jis0212<<14 | 0x35<<7 | 0x04, + 33018 - 19968: jis0212<<14 | 0x35<<7 | 0x05, + 33020 - 19968: jis0208<<14 | 0x46<<7 | 0x05, + 33021 - 19968: jis0208<<14 | 0x26<<7 | 0x1C, + 33022 - 19968: jis0212<<14 | 0x35<<7 | 0x06, + 33026 - 19968: jis0208<<14 | 0x1A<<7 | 0x48, + 33027 - 19968: jis0212<<14 | 0x35<<7 | 0x07, + 33029 - 19968: jis0208<<14 | 0x15<<7 | 0x1B, + 33030 - 19968: jis0208<<14 | 0x1F<<7 | 0x27, + 33031 - 19968: jis0208<<14 | 0x2E<<7 | 0x25, + 33032 - 19968: jis0208<<14 | 0x2B<<7 | 0x0D, + 33033 - 19968: jis0208<<14 | 0x45<<7 | 0x56, + 33034 - 19968: jis0208<<14 | 0x1F<<7 | 0x33, + 33035 - 19968: jis0212<<14 | 0x35<<7 | 0x08, + 33046 - 19968: jis0212<<14 | 0x35<<7 | 0x09, + 33047 - 19968: jis0212<<14 | 0x35<<7 | 0x0A, + 33048 - 19968: jis0212<<14 | 0x35<<7 | 0x0B, + 33050 - 19968: jis0208<<14 | 0x14<<7 | 0x32, + 33051 - 19968: jis0208<<14 | 0x45<<7 | 0x59, + 33052 - 19968: jis0212<<14 | 0x35<<7 | 0x0C, + 33054 - 19968: jis0212<<14 | 0x35<<7 | 0x0D, + 33056 - 19968: jis0212<<14 | 0x35<<7 | 0x0E, + 33059 - 19968: jis0208<<14 | 0x45<<7 | 0x5B, + 33060 - 19968: jis0212<<14 | 0x35<<7 | 0x0F, + 33063 - 19968: jis0212<<14 | 0x35<<7 | 0x10, + 33065 - 19968: jis0208<<14 | 0x45<<7 | 0x5A, + 33068 - 19968: jis0212<<14 | 0x35<<7 | 0x11, + 33071 - 19968: jis0208<<14 | 0x45<<7 | 0x5C, + 33072 - 19968: jis0212<<14 | 0x35<<7 | 0x12, + 33073 - 19968: jis0208<<14 | 0x22<<7 | 0x05, + 33075 - 19968: jis0208<<14 | 0x26<<7 | 0x1D, + 33077 - 19968: jis0212<<14 | 0x35<<7 | 0x13, + 33081 - 19968: jis0208<<14 | 0x23<<7 | 0x10, + 33082 - 19968: jis0212<<14 | 0x35<<7 | 0x14, + 33084 - 19968: jis0212<<14 | 0x35<<7 | 0x15, + 33086 - 19968: jis0208<<14 | 0x46<<7 | 0x02, + 33093 - 19968: jis0212<<14 | 0x35<<7 | 0x16, + 33094 - 19968: jis0208<<14 | 0x46<<7 | 0x01, + 33095 - 19968: jis0212<<14 | 0x35<<7 | 0x17, + 33098 - 19968: jis0212<<14 | 0x35<<7 | 0x18, + 33099 - 19968: jis0208<<14 | 0x45<<7 | 0x5D, + 33100 - 19968: jis0212<<14 | 0x35<<7 | 0x19, + 33102 - 19968: jis0208<<14 | 0x1E<<7 | 0x34, + 33104 - 19968: jis0208<<14 | 0x28<<7 | 0x44, + 33105 - 19968: jis0208<<14 | 0x46<<7 | 0x04, + 33106 - 19968: jis0212<<14 | 0x35<<7 | 0x1A, + 33107 - 19968: jis0208<<14 | 0x46<<7 | 0x03, + 33108 - 19968: jis0208<<14 | 0x18<<7 | 0x2F, + 33109 - 19968: jis0208<<14 | 0x2E<<7 | 0x32, + 33111 - 19968: jis0212<<14 | 0x35<<7 | 0x1B, + 33119 - 19968: jis0208<<14 | 0x46<<7 | 0x14, + 33120 - 19968: jis0212<<14 | 0x35<<7 | 0x1C, + 33121 - 19968: jis0212<<14 | 0x35<<7 | 0x1D, + 33125 - 19968: jis0208<<14 | 0x46<<7 | 0x08, + 33126 - 19968: jis0208<<14 | 0x46<<7 | 0x09, + 33127 - 19968: jis0212<<14 | 0x35<<7 | 0x1E, + 33128 - 19968: jis0212<<14 | 0x35<<7 | 0x1F, + 33129 - 19968: jis0212<<14 | 0x35<<7 | 0x20, + 33131 - 19968: jis0208<<14 | 0x1B<<7 | 0x4F, + 33133 - 19968: jis0212<<14 | 0x35<<7 | 0x21, + 33134 - 19968: jis0208<<14 | 0x46<<7 | 0x07, + 33135 - 19968: jis0212<<14 | 0x35<<7 | 0x22, + 33136 - 19968: jis0208<<14 | 0x18<<7 | 0x57, + 33137 - 19968: jis0208<<14 | 0x46<<7 | 0x06, + 33140 - 19968: jis0208<<14 | 0x46<<7 | 0x0A, + 33143 - 19968: jis0212<<14 | 0x35<<7 | 0x23, + 33144 - 19968: jis0208<<14 | 0x23<<7 | 0x11, + 33145 - 19968: jis0208<<14 | 0x29<<7 | 0x01, + 33146 - 19968: jis0208<<14 | 0x20<<7 | 0x02, + 33151 - 19968: jis0208<<14 | 0x21<<7 | 0x3B, + 33152 - 19968: jis0208<<14 | 0x46<<7 | 0x0E, + 33153 - 19968: jis0212<<14 | 0x35<<7 | 0x24, + 33154 - 19968: jis0208<<14 | 0x46<<7 | 0x0F, + 33155 - 19968: jis0208<<14 | 0x46<<7 | 0x0B, + 33156 - 19968: jis0212<<14 | 0x35<<7 | 0x26, + 33157 - 19968: jis0212<<14 | 0x35<<7 | 0x27, + 33158 - 19968: jis0212<<14 | 0x35<<7 | 0x28, + 33160 - 19968: jis0208<<14 | 0x46<<7 | 0x0C, + 33162 - 19968: jis0208<<14 | 0x46<<7 | 0x0D, + 33163 - 19968: jis0212<<14 | 0x35<<7 | 0x29, + 33166 - 19968: jis0212<<14 | 0x35<<7 | 0x2A, + 33167 - 19968: jis0208<<14 | 0x18<<7 | 0x30, + 33168 - 19968: jis0212<<14 | 0x35<<7 | 0x25, + 33171 - 19968: jis0208<<14 | 0x46<<7 | 0x15, + 33173 - 19968: jis0208<<14 | 0x46<<7 | 0x11, + 33174 - 19968: jis0212<<14 | 0x35<<7 | 0x2B, + 33176 - 19968: jis0212<<14 | 0x35<<7 | 0x2C, + 33178 - 19968: jis0208<<14 | 0x28<<7 | 0x45, + 33179 - 19968: jis0212<<14 | 0x35<<7 | 0x2D, + 33180 - 19968: jis0208<<14 | 0x2A<<7 | 0x4B, + 33181 - 19968: jis0208<<14 | 0x28<<7 | 0x07, + 33182 - 19968: jis0212<<14 | 0x35<<7 | 0x2E, + 33184 - 19968: jis0208<<14 | 0x46<<7 | 0x10, + 33186 - 19968: jis0212<<14 | 0x35<<7 | 0x2F, + 33187 - 19968: jis0208<<14 | 0x46<<7 | 0x13, + 33188 - 19968: jis0208<<14 | 0x46<<7 | 0x12, + 33192 - 19968: jis0208<<14 | 0x2A<<7 | 0x23, + 33193 - 19968: jis0208<<14 | 0x46<<7 | 0x16, + 33198 - 19968: jis0212<<14 | 0x35<<7 | 0x30, + 33200 - 19968: jis0208<<14 | 0x46<<7 | 0x17, + 33202 - 19968: jis0212<<14 | 0x35<<7 | 0x31, + 33203 - 19968: jis0208<<14 | 0x20<<7 | 0x16, + 33204 - 19968: jis0212<<14 | 0x35<<7 | 0x32, + 33205 - 19968: jis0208<<14 | 0x46<<7 | 0x18, + 33208 - 19968: jis0208<<14 | 0x46<<7 | 0x1A, + 33210 - 19968: jis0208<<14 | 0x46<<7 | 0x1E, + 33211 - 19968: jis0212<<14 | 0x35<<7 | 0x33, + 33213 - 19968: jis0208<<14 | 0x46<<7 | 0x1B, + 33214 - 19968: jis0208<<14 | 0x46<<7 | 0x19, + 33215 - 19968: jis0208<<14 | 0x26<<7 | 0x1E, + 33216 - 19968: jis0208<<14 | 0x46<<7 | 0x1C, + 33218 - 19968: jis0208<<14 | 0x46<<7 | 0x1D, + 33219 - 19968: jis0212<<14 | 0x35<<7 | 0x35, + 33221 - 19968: jis0212<<14 | 0x35<<7 | 0x36, + 33222 - 19968: jis0208<<14 | 0x11<<7 | 0x11, + 33224 - 19968: jis0208<<14 | 0x46<<7 | 0x24, + 33225 - 19968: jis0208<<14 | 0x46<<7 | 0x1F, + 33226 - 19968: jis0212<<14 | 0x35<<7 | 0x37, + 33227 - 19968: jis0212<<14 | 0x35<<7 | 0x34, + 33229 - 19968: jis0208<<14 | 0x46<<7 | 0x20, + 33230 - 19968: jis0212<<14 | 0x35<<7 | 0x38, + 33231 - 19968: jis0212<<14 | 0x35<<7 | 0x39, + 33233 - 19968: jis0208<<14 | 0x46<<7 | 0x21, + 33235 - 19968: jis0208<<14 | 0x21<<7 | 0x00, + 33237 - 19968: jis0212<<14 | 0x35<<7 | 0x3A, + 33239 - 19968: jis0212<<14 | 0x35<<7 | 0x3B, + 33240 - 19968: jis0208<<14 | 0x46<<7 | 0x23, + 33241 - 19968: jis0208<<14 | 0x46<<7 | 0x22, + 33242 - 19968: jis0208<<14 | 0x46<<7 | 0x25, + 33243 - 19968: jis0212<<14 | 0x35<<7 | 0x3C, + 33245 - 19968: jis0212<<14 | 0x35<<7 | 0x3D, + 33246 - 19968: jis0212<<14 | 0x35<<7 | 0x3E, + 33247 - 19968: jis0208<<14 | 0x46<<7 | 0x26, + 33248 - 19968: jis0208<<14 | 0x46<<7 | 0x27, + 33249 - 19968: jis0212<<14 | 0x35<<7 | 0x3F, + 33251 - 19968: jis0208<<14 | 0x1E<<7 | 0x22, + 33252 - 19968: jis0212<<14 | 0x35<<7 | 0x40, + 33253 - 19968: jis0208<<14 | 0x11<<7 | 0x48, + 33255 - 19968: jis0208<<14 | 0x46<<7 | 0x28, + 33256 - 19968: jis0208<<14 | 0x2D<<7 | 0x36, + 33258 - 19968: jis0208<<14 | 0x1B<<7 | 0x0A, + 33259 - 19968: jis0212<<14 | 0x35<<7 | 0x41, + 33260 - 19968: jis0212<<14 | 0x35<<7 | 0x42, + 33261 - 19968: jis0208<<14 | 0x1C<<7 | 0x0C, + 33264 - 19968: jis0212<<14 | 0x35<<7 | 0x43, + 33265 - 19968: jis0212<<14 | 0x35<<7 | 0x44, + 33266 - 19968: jis0212<<14 | 0x35<<7 | 0x45, + 33267 - 19968: jis0208<<14 | 0x1A<<7 | 0x49, + 33268 - 19968: jis0208<<14 | 0x22<<7 | 0x36, + 33269 - 19968: jis0212<<14 | 0x35<<7 | 0x46, + 33270 - 19968: jis0212<<14 | 0x35<<7 | 0x47, + 33272 - 19968: jis0212<<14 | 0x35<<7 | 0x48, + 33273 - 19968: jis0212<<14 | 0x35<<7 | 0x49, + 33274 - 19968: jis0208<<14 | 0x46<<7 | 0x29, + 33275 - 19968: jis0208<<14 | 0x46<<7 | 0x2A, + 33276 - 19968: jis0208<<14 | 0x10<<7 | 0x10, + 33277 - 19968: jis0212<<14 | 0x35<<7 | 0x4A, + 33278 - 19968: jis0208<<14 | 0x46<<7 | 0x2B, + 33279 - 19968: jis0212<<14 | 0x35<<7 | 0x4B, + 33280 - 19968: jis0212<<14 | 0x35<<7 | 0x4C, + 33281 - 19968: jis0208<<14 | 0x46<<7 | 0x2C, + 33282 - 19968: jis0208<<14 | 0x46<<7 | 0x2D, + 33283 - 19968: jis0212<<14 | 0x35<<7 | 0x4D, + 33285 - 19968: jis0208<<14 | 0x46<<7 | 0x2E, + 33287 - 19968: jis0208<<14 | 0x46<<7 | 0x2F, + 33288 - 19968: jis0208<<14 | 0x15<<7 | 0x1C, + 33289 - 19968: jis0208<<14 | 0x39<<7 | 0x09, + 33290 - 19968: jis0208<<14 | 0x46<<7 | 0x30, + 33292 - 19968: jis0208<<14 | 0x1F<<7 | 0x44, + 33293 - 19968: jis0208<<14 | 0x46<<7 | 0x31, + 33294 - 19968: jis0208<<14 | 0x1B<<7 | 0x2A, + 33295 - 19968: jis0212<<14 | 0x35<<7 | 0x4E, + 33296 - 19968: jis0208<<14 | 0x46<<7 | 0x32, + 33298 - 19968: jis0208<<14 | 0x2F<<7 | 0x0F, + 33299 - 19968: jis0212<<14 | 0x35<<7 | 0x4F, + 33300 - 19968: jis0212<<14 | 0x35<<7 | 0x50, + 33302 - 19968: jis0208<<14 | 0x46<<7 | 0x33, + 33303 - 19968: jis0208<<14 | 0x29<<7 | 0x3D, + 33304 - 19968: jis0208<<14 | 0x13<<7 | 0x3B, + 33305 - 19968: jis0212<<14 | 0x35<<7 | 0x51, + 33306 - 19968: jis0212<<14 | 0x35<<7 | 0x52, + 33307 - 19968: jis0208<<14 | 0x20<<7 | 0x03, + 33308 - 19968: jis0208<<14 | 0x1C<<7 | 0x37, + 33309 - 19968: jis0212<<14 | 0x35<<7 | 0x53, + 33310 - 19968: jis0208<<14 | 0x28<<7 | 0x50, + 33311 - 19968: jis0208<<14 | 0x1C<<7 | 0x0D, + 33313 - 19968: jis0212<<14 | 0x35<<7 | 0x54, + 33314 - 19968: jis0212<<14 | 0x35<<7 | 0x55, + 33320 - 19968: jis0212<<14 | 0x35<<7 | 0x56, + 33321 - 19968: jis0208<<14 | 0x46<<7 | 0x34, + 33322 - 19968: jis0208<<14 | 0x18<<7 | 0x31, + 33323 - 19968: jis0208<<14 | 0x46<<7 | 0x35, + 33324 - 19968: jis0208<<14 | 0x27<<7 | 0x2B, + 33326 - 19968: jis0208<<14 | 0x46<<7 | 0x43, + 33330 - 19968: jis0212<<14 | 0x35<<7 | 0x57, + 33331 - 19968: jis0208<<14 | 0x46<<7 | 0x37, + 33332 - 19968: jis0212<<14 | 0x35<<7 | 0x58, + 33333 - 19968: jis0208<<14 | 0x21<<7 | 0x28, + 33334 - 19968: jis0208<<14 | 0x26<<7 | 0x54, + 33335 - 19968: jis0208<<14 | 0x17<<7 | 0x1E, + 33336 - 19968: jis0208<<14 | 0x46<<7 | 0x36, + 33337 - 19968: jis0208<<14 | 0x20<<7 | 0x04, + 33338 - 19968: jis0212<<14 | 0x35<<7 | 0x59, + 33344 - 19968: jis0208<<14 | 0x46<<7 | 0x38, + 33347 - 19968: jis0212<<14 | 0x35<<7 | 0x5A, + 33348 - 19968: jis0212<<14 | 0x35<<7 | 0x5B, + 33349 - 19968: jis0212<<14 | 0x35<<7 | 0x5C, + 33350 - 19968: jis0212<<14 | 0x35<<7 | 0x5D, + 33351 - 19968: jis0208<<14 | 0x23<<7 | 0x59, + 33355 - 19968: jis0212<<14 | 0x36<<7 | 0x00, + 33358 - 19968: jis0212<<14 | 0x36<<7 | 0x01, + 33359 - 19968: jis0212<<14 | 0x36<<7 | 0x02, + 33361 - 19968: jis0212<<14 | 0x36<<7 | 0x03, + 33366 - 19968: jis0212<<14 | 0x36<<7 | 0x04, + 33368 - 19968: jis0208<<14 | 0x46<<7 | 0x3A, + 33369 - 19968: jis0208<<14 | 0x46<<7 | 0x39, + 33370 - 19968: jis0208<<14 | 0x46<<7 | 0x3C, + 33372 - 19968: jis0212<<14 | 0x36<<7 | 0x05, + 33373 - 19968: jis0208<<14 | 0x46<<7 | 0x3B, + 33375 - 19968: jis0208<<14 | 0x46<<7 | 0x3D, + 33376 - 19968: jis0212<<14 | 0x36<<7 | 0x06, + 33378 - 19968: jis0208<<14 | 0x46<<7 | 0x3F, + 33379 - 19968: jis0212<<14 | 0x36<<7 | 0x07, + 33380 - 19968: jis0208<<14 | 0x46<<7 | 0x3E, + 33382 - 19968: jis0208<<14 | 0x13<<7 | 0x2E, + 33383 - 19968: jis0212<<14 | 0x36<<7 | 0x08, + 33384 - 19968: jis0208<<14 | 0x46<<7 | 0x40, + 33386 - 19968: jis0208<<14 | 0x46<<7 | 0x41, + 33387 - 19968: jis0208<<14 | 0x46<<7 | 0x42, + 33389 - 19968: jis0212<<14 | 0x36<<7 | 0x09, + 33390 - 19968: jis0208<<14 | 0x19<<7 | 0x10, + 33391 - 19968: jis0208<<14 | 0x2D<<7 | 0x28, + 33393 - 19968: jis0208<<14 | 0x46<<7 | 0x44, + 33394 - 19968: jis0208<<14 | 0x1E<<7 | 0x06, + 33396 - 19968: jis0212<<14 | 0x36<<7 | 0x0A, + 33398 - 19968: jis0208<<14 | 0x10<<7 | 0x4F, + 33399 - 19968: jis0208<<14 | 0x46<<7 | 0x45, + 33400 - 19968: jis0208<<14 | 0x46<<7 | 0x46, + 33403 - 19968: jis0212<<14 | 0x36<<7 | 0x0B, + 33405 - 19968: jis0212<<14 | 0x36<<7 | 0x0C, + 33406 - 19968: jis0208<<14 | 0x46<<7 | 0x47, + 33407 - 19968: jis0212<<14 | 0x36<<7 | 0x0D, + 33408 - 19968: jis0212<<14 | 0x36<<7 | 0x0E, + 33409 - 19968: jis0212<<14 | 0x36<<7 | 0x0F, + 33411 - 19968: jis0212<<14 | 0x36<<7 | 0x10, + 33412 - 19968: jis0212<<14 | 0x36<<7 | 0x11, + 33415 - 19968: jis0212<<14 | 0x36<<7 | 0x12, + 33417 - 19968: jis0212<<14 | 0x36<<7 | 0x13, + 33418 - 19968: jis0212<<14 | 0x36<<7 | 0x14, + 33419 - 19968: jis0208<<14 | 0x0F<<7 | 0x51, + 33421 - 19968: jis0208<<14 | 0x46<<7 | 0x48, + 33422 - 19968: jis0212<<14 | 0x36<<7 | 0x15, + 33425 - 19968: jis0212<<14 | 0x36<<7 | 0x16, + 33426 - 19968: jis0208<<14 | 0x46<<7 | 0x49, + 33428 - 19968: jis0212<<14 | 0x36<<7 | 0x17, + 33430 - 19968: jis0212<<14 | 0x36<<7 | 0x18, + 33432 - 19968: jis0212<<14 | 0x36<<7 | 0x19, + 33433 - 19968: jis0208<<14 | 0x28<<7 | 0x46, + 33434 - 19968: jis0212<<14 | 0x36<<7 | 0x1A, + 33435 - 19968: jis0212<<14 | 0x36<<7 | 0x1B, + 33437 - 19968: jis0208<<14 | 0x1B<<7 | 0x26, + 33439 - 19968: jis0208<<14 | 0x46<<7 | 0x4B, + 33440 - 19968: jis0212<<14 | 0x36<<7 | 0x1C, + 33441 - 19968: jis0212<<14 | 0x36<<7 | 0x1D, + 33443 - 19968: jis0212<<14 | 0x36<<7 | 0x1E, + 33444 - 19968: jis0212<<14 | 0x36<<7 | 0x1F, + 33445 - 19968: jis0208<<14 | 0x12<<7 | 0x08, + 33446 - 19968: jis0208<<14 | 0x0F<<7 | 0x11, + 33447 - 19968: jis0212<<14 | 0x36<<7 | 0x20, + 33448 - 19968: jis0212<<14 | 0x36<<7 | 0x21, + 33449 - 19968: jis0212<<14 | 0x36<<7 | 0x22, + 33450 - 19968: jis0212<<14 | 0x36<<7 | 0x23, + 33451 - 19968: jis0208<<14 | 0x46<<7 | 0x4A, + 33452 - 19968: jis0208<<14 | 0x46<<7 | 0x4D, + 33453 - 19968: jis0208<<14 | 0x26<<7 | 0x2D, + 33454 - 19968: jis0212<<14 | 0x36<<7 | 0x24, + 33455 - 19968: jis0208<<14 | 0x1E<<7 | 0x23, + 33456 - 19968: jis0212<<14 | 0x36<<7 | 0x25, + 33457 - 19968: jis0208<<14 | 0x11<<7 | 0x35, + 33458 - 19968: jis0212<<14 | 0x36<<7 | 0x26, + 33459 - 19968: jis0208<<14 | 0x2A<<7 | 0x06, + 33460 - 19968: jis0212<<14 | 0x36<<7 | 0x27, + 33463 - 19968: jis0212<<14 | 0x36<<7 | 0x28, + 33464 - 19968: jis0208<<14 | 0x16<<7 | 0x3C, + 33465 - 19968: jis0208<<14 | 0x15<<7 | 0x3B, + 33466 - 19968: jis0212<<14 | 0x36<<7 | 0x29, + 33467 - 19968: jis0208<<14 | 0x46<<7 | 0x4C, + 33468 - 19968: jis0212<<14 | 0x36<<7 | 0x2A, + 33469 - 19968: jis0208<<14 | 0x11<<7 | 0x49, + 33470 - 19968: jis0212<<14 | 0x36<<7 | 0x2B, + 33471 - 19968: jis0212<<14 | 0x36<<7 | 0x2C, + 33477 - 19968: jis0208<<14 | 0x13<<7 | 0x02, + 33478 - 19968: jis0212<<14 | 0x36<<7 | 0x2D, + 33488 - 19968: jis0212<<14 | 0x36<<7 | 0x2E, + 33489 - 19968: jis0208<<14 | 0x10<<7 | 0x50, + 33490 - 19968: jis0208<<14 | 0x46<<7 | 0x51, + 33491 - 19968: jis0208<<14 | 0x2D<<7 | 0x49, + 33492 - 19968: jis0208<<14 | 0x21<<7 | 0x3C, + 33493 - 19968: jis0212<<14 | 0x36<<7 | 0x2F, + 33495 - 19968: jis0208<<14 | 0x28<<7 | 0x23, + 33497 - 19968: jis0208<<14 | 0x46<<7 | 0x5D, + 33498 - 19968: jis0212<<14 | 0x36<<7 | 0x30, + 33499 - 19968: jis0208<<14 | 0x11<<7 | 0x36, + 33500 - 19968: jis0208<<14 | 0x46<<7 | 0x5B, + 33502 - 19968: jis0208<<14 | 0x46<<7 | 0x59, + 33503 - 19968: jis0208<<14 | 0x46<<7 | 0x50, + 33504 - 19968: jis0212<<14 | 0x36<<7 | 0x31, + 33505 - 19968: jis0208<<14 | 0x46<<7 | 0x4E, + 33506 - 19968: jis0212<<14 | 0x36<<7 | 0x32, + 33507 - 19968: jis0208<<14 | 0x46<<7 | 0x4F, + 33508 - 19968: jis0212<<14 | 0x36<<7 | 0x33, + 33509 - 19968: jis0208<<14 | 0x1B<<7 | 0x42, + 33510 - 19968: jis0208<<14 | 0x15<<7 | 0x4B, + 33511 - 19968: jis0208<<14 | 0x22<<7 | 0x56, + 33512 - 19968: jis0212<<14 | 0x36<<7 | 0x34, + 33514 - 19968: jis0212<<14 | 0x36<<7 | 0x35, + 33515 - 19968: jis0208<<14 | 0x25<<7 | 0x30, + 33517 - 19968: jis0212<<14 | 0x36<<7 | 0x36, + 33519 - 19968: jis0212<<14 | 0x36<<7 | 0x37, + 33521 - 19968: jis0208<<14 | 0x10<<7 | 0x30, + 33523 - 19968: jis0208<<14 | 0x46<<7 | 0x53, + 33524 - 19968: jis0208<<14 | 0x46<<7 | 0x52, + 33526 - 19968: jis0212<<14 | 0x36<<7 | 0x38, + 33527 - 19968: jis0212<<14 | 0x36<<7 | 0x39, + 33529 - 19968: jis0208<<14 | 0x46<<7 | 0x58, + 33530 - 19968: jis0208<<14 | 0x46<<7 | 0x54, + 33531 - 19968: jis0208<<14 | 0x46<<7 | 0x57, + 33533 - 19968: jis0212<<14 | 0x36<<7 | 0x3A, + 33534 - 19968: jis0212<<14 | 0x36<<7 | 0x3B, + 33536 - 19968: jis0212<<14 | 0x36<<7 | 0x3C, + 33537 - 19968: jis0208<<14 | 0x5A<<7 | 0x36, + 33538 - 19968: jis0208<<14 | 0x2B<<7 | 0x2F, + 33539 - 19968: jis0208<<14 | 0x46<<7 | 0x56, + 33540 - 19968: jis0208<<14 | 0x11<<7 | 0x37, + 33541 - 19968: jis0208<<14 | 0x12<<7 | 0x5C, + 33542 - 19968: jis0208<<14 | 0x46<<7 | 0x5A, + 33543 - 19968: jis0212<<14 | 0x36<<7 | 0x3E, + 33544 - 19968: jis0212<<14 | 0x36<<7 | 0x3F, + 33545 - 19968: jis0208<<14 | 0x46<<7 | 0x5C, + 33546 - 19968: jis0212<<14 | 0x36<<7 | 0x40, + 33547 - 19968: jis0212<<14 | 0x36<<7 | 0x41, + 33550 - 19968: jis0208<<14 | 0x16<<7 | 0x33, + 33558 - 19968: jis0208<<14 | 0x47<<7 | 0x02, + 33559 - 19968: jis0208<<14 | 0x47<<7 | 0x0B, + 33560 - 19968: jis0208<<14 | 0x47<<7 | 0x0C, + 33563 - 19968: jis0212<<14 | 0x36<<7 | 0x43, + 33564 - 19968: jis0208<<14 | 0x0F<<7 | 0x0A, + 33565 - 19968: jis0212<<14 | 0x36<<7 | 0x44, + 33566 - 19968: jis0212<<14 | 0x36<<7 | 0x45, + 33567 - 19968: jis0212<<14 | 0x36<<7 | 0x46, + 33569 - 19968: jis0212<<14 | 0x36<<7 | 0x47, + 33570 - 19968: jis0212<<14 | 0x36<<7 | 0x48, + 33571 - 19968: jis0208<<14 | 0x47<<7 | 0x13, + 33576 - 19968: jis0208<<14 | 0x0F<<7 | 0x50, + 33579 - 19968: jis0208<<14 | 0x47<<7 | 0x0A, + 33580 - 19968: jis0212<<14 | 0x36<<7 | 0x49, + 33581 - 19968: jis0212<<14 | 0x36<<7 | 0x4A, + 33582 - 19968: jis0212<<14 | 0x36<<7 | 0x4B, + 33583 - 19968: jis0208<<14 | 0x47<<7 | 0x09, + 33584 - 19968: jis0212<<14 | 0x36<<7 | 0x4C, + 33585 - 19968: jis0208<<14 | 0x47<<7 | 0x04, + 33586 - 19968: jis0208<<14 | 0x47<<7 | 0x03, + 33587 - 19968: jis0212<<14 | 0x36<<7 | 0x4D, + 33588 - 19968: jis0208<<14 | 0x47<<7 | 0x01, + 33589 - 19968: jis0208<<14 | 0x47<<7 | 0x00, + 33590 - 19968: jis0208<<14 | 0x22<<7 | 0x42, + 33591 - 19968: jis0212<<14 | 0x36<<7 | 0x4E, + 33592 - 19968: jis0208<<14 | 0x21<<7 | 0x5A, + 33593 - 19968: jis0208<<14 | 0x47<<7 | 0x06, + 33594 - 19968: jis0212<<14 | 0x36<<7 | 0x4F, + 33596 - 19968: jis0212<<14 | 0x36<<7 | 0x50, + 33597 - 19968: jis0212<<14 | 0x36<<7 | 0x51, + 33600 - 19968: jis0208<<14 | 0x47<<7 | 0x05, + 33602 - 19968: jis0212<<14 | 0x36<<7 | 0x52, + 33603 - 19968: jis0212<<14 | 0x36<<7 | 0x53, + 33604 - 19968: jis0212<<14 | 0x36<<7 | 0x54, + 33605 - 19968: jis0208<<14 | 0x47<<7 | 0x08, + 33607 - 19968: jis0212<<14 | 0x36<<7 | 0x55, + 33609 - 19968: jis0208<<14 | 0x20<<7 | 0x4F, + 33610 - 19968: jis0208<<14 | 0x16<<7 | 0x34, + 33613 - 19968: jis0212<<14 | 0x36<<7 | 0x56, + 33614 - 19968: jis0212<<14 | 0x36<<7 | 0x57, + 33615 - 19968: jis0208<<14 | 0x10<<7 | 0x20, + 33616 - 19968: jis0208<<14 | 0x47<<7 | 0x07, + 33617 - 19968: jis0212<<14 | 0x36<<7 | 0x58, + 33618 - 19968: jis0208<<14 | 0x18<<7 | 0x32, + 33619 - 19968: jis0212<<14 | 0x37<<7 | 0x1D, + 33620 - 19968: jis0212<<14 | 0x36<<7 | 0x42, + 33621 - 19968: jis0212<<14 | 0x36<<7 | 0x59, + 33622 - 19968: jis0212<<14 | 0x36<<7 | 0x5A, + 33623 - 19968: jis0212<<14 | 0x36<<7 | 0x5B, + 33624 - 19968: jis0208<<14 | 0x20<<7 | 0x50, + 33634 - 19968: jis0208<<14 | 0x5A<<7 | 0x37, + 33648 - 19968: jis0212<<14 | 0x36<<7 | 0x5C, + 33651 - 19968: jis0208<<14 | 0x47<<7 | 0x19, + 33653 - 19968: jis0208<<14 | 0x47<<7 | 0x1A, + 33655 - 19968: jis0208<<14 | 0x11<<7 | 0x38, + 33656 - 19968: jis0212<<14 | 0x36<<7 | 0x5D, + 33659 - 19968: jis0208<<14 | 0x11<<7 | 0x0D, + 33660 - 19968: jis0208<<14 | 0x47<<7 | 0x17, + 33661 - 19968: jis0212<<14 | 0x37<<7 | 0x00, + 33663 - 19968: jis0208<<14 | 0x5A<<7 | 0x38, + 33664 - 19968: jis0212<<14 | 0x37<<7 | 0x02, + 33666 - 19968: jis0212<<14 | 0x37<<7 | 0x03, + 33668 - 19968: jis0212<<14 | 0x37<<7 | 0x04, + 33669 - 19968: jis0208<<14 | 0x47<<7 | 0x0D, + 33670 - 19968: jis0212<<14 | 0x37<<7 | 0x05, + 33671 - 19968: jis0208<<14 | 0x47<<7 | 0x15, + 33673 - 19968: jis0208<<14 | 0x47<<7 | 0x1C, + 33674 - 19968: jis0208<<14 | 0x47<<7 | 0x16, + 33677 - 19968: jis0212<<14 | 0x37<<7 | 0x06, + 33678 - 19968: jis0208<<14 | 0x47<<7 | 0x14, + 33682 - 19968: jis0212<<14 | 0x37<<7 | 0x07, + 33683 - 19968: jis0208<<14 | 0x46<<7 | 0x55, + 33684 - 19968: jis0212<<14 | 0x37<<7 | 0x08, + 33685 - 19968: jis0212<<14 | 0x37<<7 | 0x09, + 33686 - 19968: jis0208<<14 | 0x47<<7 | 0x12, + 33688 - 19968: jis0212<<14 | 0x37<<7 | 0x0A, + 33689 - 19968: jis0212<<14 | 0x37<<7 | 0x0B, + 33690 - 19968: jis0208<<14 | 0x47<<7 | 0x0E, + 33691 - 19968: jis0212<<14 | 0x37<<7 | 0x0C, + 33692 - 19968: jis0212<<14 | 0x37<<7 | 0x0D, + 33693 - 19968: jis0212<<14 | 0x37<<7 | 0x0E, + 33694 - 19968: jis0208<<14 | 0x13<<7 | 0x2F, + 33695 - 19968: jis0208<<14 | 0x47<<7 | 0x10, + 33696 - 19968: jis0208<<14 | 0x47<<7 | 0x1B, + 33698 - 19968: jis0208<<14 | 0x47<<7 | 0x11, + 33702 - 19968: jis0212<<14 | 0x37<<7 | 0x0F, + 33703 - 19968: jis0212<<14 | 0x37<<7 | 0x10, + 33704 - 19968: jis0208<<14 | 0x47<<7 | 0x1D, + 33705 - 19968: jis0212<<14 | 0x37<<7 | 0x11, + 33706 - 19968: jis0208<<14 | 0x47<<7 | 0x0F, + 33707 - 19968: jis0208<<14 | 0x26<<7 | 0x5B, + 33708 - 19968: jis0212<<14 | 0x37<<7 | 0x12, + 33709 - 19968: jis0212<<14 | 0x37<<7 | 0x2B, + 33713 - 19968: jis0208<<14 | 0x2C<<7 | 0x48, + 33717 - 19968: jis0208<<14 | 0x47<<7 | 0x18, + 33725 - 19968: jis0208<<14 | 0x47<<7 | 0x2E, + 33726 - 19968: jis0212<<14 | 0x37<<7 | 0x13, + 33727 - 19968: jis0212<<14 | 0x37<<7 | 0x14, + 33728 - 19968: jis0212<<14 | 0x37<<7 | 0x15, + 33729 - 19968: jis0208<<14 | 0x47<<7 | 0x26, + 33733 - 19968: jis0208<<14 | 0x1E<<7 | 0x5A, + 33735 - 19968: jis0208<<14 | 0x5A<<7 | 0x39, + 33737 - 19968: jis0212<<14 | 0x37<<7 | 0x17, + 33738 - 19968: jis0208<<14 | 0x14<<7 | 0x25, + 33740 - 19968: jis0208<<14 | 0x15<<7 | 0x3C, + 33742 - 19968: jis0208<<14 | 0x47<<7 | 0x21, + 33743 - 19968: jis0212<<14 | 0x37<<7 | 0x18, + 33744 - 19968: jis0212<<14 | 0x37<<7 | 0x19, + 33745 - 19968: jis0212<<14 | 0x37<<7 | 0x1A, + 33747 - 19968: jis0208<<14 | 0x11<<7 | 0x3A, + 33748 - 19968: jis0212<<14 | 0x37<<7 | 0x1B, + 33750 - 19968: jis0208<<14 | 0x1D<<7 | 0x33, + 33752 - 19968: jis0208<<14 | 0x47<<7 | 0x24, + 33756 - 19968: jis0208<<14 | 0x19<<7 | 0x39, + 33757 - 19968: jis0212<<14 | 0x37<<7 | 0x1C, + 33759 - 19968: jis0208<<14 | 0x24<<7 | 0x30, + 33760 - 19968: jis0208<<14 | 0x47<<7 | 0x29, + 33768 - 19968: jis0212<<14 | 0x37<<7 | 0x1E, + 33769 - 19968: jis0208<<14 | 0x29<<7 | 0x4D, + 33770 - 19968: jis0212<<14 | 0x37<<7 | 0x1F, + 33771 - 19968: jis0208<<14 | 0x47<<7 | 0x20, + 33775 - 19968: jis0208<<14 | 0x11<<7 | 0x39, + 33776 - 19968: jis0208<<14 | 0x17<<7 | 0x35, + 33777 - 19968: jis0208<<14 | 0x28<<7 | 0x08, + 33778 - 19968: jis0208<<14 | 0x47<<7 | 0x2A, + 33780 - 19968: jis0208<<14 | 0x47<<7 | 0x1E, + 33782 - 19968: jis0208<<14 | 0x5A<<7 | 0x3A, + 33783 - 19968: jis0208<<14 | 0x47<<7 | 0x27, + 33784 - 19968: jis0212<<14 | 0x37<<7 | 0x21, + 33785 - 19968: jis0212<<14 | 0x37<<7 | 0x22, + 33787 - 19968: jis0208<<14 | 0x47<<7 | 0x31, + 33788 - 19968: jis0212<<14 | 0x37<<7 | 0x23, + 33789 - 19968: jis0208<<14 | 0x47<<7 | 0x22, + 33793 - 19968: jis0212<<14 | 0x37<<7 | 0x24, + 33795 - 19968: jis0208<<14 | 0x47<<7 | 0x23, + 33796 - 19968: jis0208<<14 | 0x25<<7 | 0x19, + 33798 - 19968: jis0212<<14 | 0x37<<7 | 0x25, + 33799 - 19968: jis0208<<14 | 0x47<<7 | 0x28, + 33802 - 19968: jis0212<<14 | 0x37<<7 | 0x26, + 33803 - 19968: jis0208<<14 | 0x47<<7 | 0x25, + 33804 - 19968: jis0208<<14 | 0x2A<<7 | 0x07, + 33805 - 19968: jis0208<<14 | 0x47<<7 | 0x2B, + 33806 - 19968: jis0208<<14 | 0x0F<<7 | 0x3F, + 33807 - 19968: jis0212<<14 | 0x37<<7 | 0x27, + 33809 - 19968: jis0212<<14 | 0x37<<7 | 0x28, + 33811 - 19968: jis0208<<14 | 0x47<<7 | 0x1F, + 33813 - 19968: jis0212<<14 | 0x37<<7 | 0x29, + 33817 - 19968: jis0212<<14 | 0x37<<7 | 0x2A, + 33824 - 19968: jis0208<<14 | 0x47<<7 | 0x2D, + 33826 - 19968: jis0208<<14 | 0x47<<7 | 0x2C, + 33833 - 19968: jis0208<<14 | 0x26<<7 | 0x4A, + 33834 - 19968: jis0208<<14 | 0x47<<7 | 0x33, + 33836 - 19968: jis0208<<14 | 0x47<<7 | 0x3E, + 33839 - 19968: jis0212<<14 | 0x37<<7 | 0x2C, + 33841 - 19968: jis0208<<14 | 0x12<<7 | 0x5D, + 33845 - 19968: jis0208<<14 | 0x47<<7 | 0x41, + 33848 - 19968: jis0208<<14 | 0x47<<7 | 0x2F, + 33849 - 19968: jis0212<<14 | 0x37<<7 | 0x2D, + 33852 - 19968: jis0208<<14 | 0x47<<7 | 0x34, + 33853 - 19968: jis0208<<14 | 0x2C<<7 | 0x4D, + 33861 - 19968: jis0212<<14 | 0x37<<7 | 0x2E, + 33862 - 19968: jis0208<<14 | 0x47<<7 | 0x3D, + 33863 - 19968: jis0212<<14 | 0x37<<7 | 0x2F, + 33864 - 19968: jis0208<<14 | 0x5A<<7 | 0x3B, + 33865 - 19968: jis0208<<14 | 0x2C<<7 | 0x34, + 33866 - 19968: jis0212<<14 | 0x37<<7 | 0x31, + 33869 - 19968: jis0212<<14 | 0x37<<7 | 0x32, + 33870 - 19968: jis0208<<14 | 0x2D<<7 | 0x09, + 33871 - 19968: jis0212<<14 | 0x37<<7 | 0x33, + 33873 - 19968: jis0212<<14 | 0x37<<7 | 0x34, + 33874 - 19968: jis0212<<14 | 0x37<<7 | 0x35, + 33878 - 19968: jis0212<<14 | 0x37<<7 | 0x36, + 33879 - 19968: jis0208<<14 | 0x22<<7 | 0x57, + 33880 - 19968: jis0212<<14 | 0x37<<7 | 0x37, + 33881 - 19968: jis0212<<14 | 0x37<<7 | 0x38, + 33882 - 19968: jis0212<<14 | 0x37<<7 | 0x39, + 33883 - 19968: jis0208<<14 | 0x12<<7 | 0x4A, + 33884 - 19968: jis0212<<14 | 0x37<<7 | 0x3A, + 33888 - 19968: jis0212<<14 | 0x37<<7 | 0x3B, + 33889 - 19968: jis0208<<14 | 0x28<<7 | 0x51, + 33890 - 19968: jis0208<<14 | 0x47<<7 | 0x43, + 33891 - 19968: jis0208<<14 | 0x25<<7 | 0x00, + 33892 - 19968: jis0212<<14 | 0x37<<7 | 0x3C, + 33893 - 19968: jis0212<<14 | 0x37<<7 | 0x3D, + 33894 - 19968: jis0208<<14 | 0x0F<<7 | 0x10, + 33895 - 19968: jis0212<<14 | 0x37<<7 | 0x3E, + 33897 - 19968: jis0208<<14 | 0x47<<7 | 0x3C, + 33898 - 19968: jis0212<<14 | 0x37<<7 | 0x3F, + 33899 - 19968: jis0208<<14 | 0x47<<7 | 0x38, + 33900 - 19968: jis0208<<14 | 0x20<<7 | 0x51, + 33901 - 19968: jis0208<<14 | 0x47<<7 | 0x32, + 33902 - 19968: jis0208<<14 | 0x47<<7 | 0x3A, + 33903 - 19968: jis0208<<14 | 0x47<<7 | 0x3F, + 33904 - 19968: jis0212<<14 | 0x37<<7 | 0x40, + 33905 - 19968: jis0208<<14 | 0x26<<7 | 0x0B, + 33907 - 19968: jis0212<<14 | 0x37<<7 | 0x41, + 33908 - 19968: jis0212<<14 | 0x37<<7 | 0x42, + 33909 - 19968: jis0208<<14 | 0x0F<<7 | 0x09, + 33910 - 19968: jis0212<<14 | 0x37<<7 | 0x43, + 33911 - 19968: jis0208<<14 | 0x47<<7 | 0x37, + 33912 - 19968: jis0212<<14 | 0x37<<7 | 0x44, + 33913 - 19968: jis0208<<14 | 0x47<<7 | 0x40, + 33914 - 19968: jis0208<<14 | 0x28<<7 | 0x57, + 33916 - 19968: jis0212<<14 | 0x37<<7 | 0x45, + 33917 - 19968: jis0212<<14 | 0x37<<7 | 0x46, + 33921 - 19968: jis0212<<14 | 0x37<<7 | 0x47, + 33922 - 19968: jis0208<<14 | 0x47<<7 | 0x3B, + 33924 - 19968: jis0208<<14 | 0x47<<7 | 0x36, + 33925 - 19968: jis0212<<14 | 0x37<<7 | 0x48, + 33931 - 19968: jis0208<<14 | 0x1D<<7 | 0x34, + 33936 - 19968: jis0208<<14 | 0x1C<<7 | 0x0E, + 33938 - 19968: jis0212<<14 | 0x37<<7 | 0x49, + 33939 - 19968: jis0212<<14 | 0x37<<7 | 0x4A, + 33940 - 19968: jis0208<<14 | 0x1B<<7 | 0x0B, + 33941 - 19968: jis0212<<14 | 0x37<<7 | 0x4B, + 33945 - 19968: jis0208<<14 | 0x2B<<7 | 0x37, + 33948 - 19968: jis0208<<14 | 0x28<<7 | 0x26, + 33950 - 19968: jis0212<<14 | 0x37<<7 | 0x4C, + 33951 - 19968: jis0208<<14 | 0x47<<7 | 0x46, + 33953 - 19968: jis0208<<14 | 0x47<<7 | 0x4F, + 33958 - 19968: jis0212<<14 | 0x37<<7 | 0x4D, + 33960 - 19968: jis0212<<14 | 0x37<<7 | 0x4E, + 33961 - 19968: jis0212<<14 | 0x37<<7 | 0x4F, + 33962 - 19968: jis0212<<14 | 0x37<<7 | 0x50, + 33965 - 19968: jis0208<<14 | 0x47<<7 | 0x39, + 33967 - 19968: jis0212<<14 | 0x37<<7 | 0x51, + 33969 - 19968: jis0212<<14 | 0x37<<7 | 0x52, + 33970 - 19968: jis0208<<14 | 0x12<<7 | 0x56, + 33972 - 19968: jis0208<<14 | 0x5A<<7 | 0x3C, + 33976 - 19968: jis0208<<14 | 0x1D<<7 | 0x57, + 33977 - 19968: jis0208<<14 | 0x47<<7 | 0x44, + 33978 - 19968: jis0212<<14 | 0x37<<7 | 0x54, + 33979 - 19968: jis0208<<14 | 0x47<<7 | 0x49, + 33980 - 19968: jis0208<<14 | 0x20<<7 | 0x52, + 33981 - 19968: jis0212<<14 | 0x37<<7 | 0x55, + 33982 - 19968: jis0212<<14 | 0x37<<7 | 0x56, + 33983 - 19968: jis0208<<14 | 0x47<<7 | 0x45, + 33984 - 19968: jis0212<<14 | 0x37<<7 | 0x57, + 33985 - 19968: jis0208<<14 | 0x47<<7 | 0x4C, + 33986 - 19968: jis0212<<14 | 0x37<<7 | 0x58, + 33988 - 19968: jis0208<<14 | 0x22<<7 | 0x3E, + 33990 - 19968: jis0208<<14 | 0x47<<7 | 0x4D, + 33991 - 19968: jis0212<<14 | 0x37<<7 | 0x59, + 33992 - 19968: jis0212<<14 | 0x37<<7 | 0x5A, + 33993 - 19968: jis0208<<14 | 0x2C<<7 | 0x35, + 33994 - 19968: jis0208<<14 | 0x47<<7 | 0x42, + 33995 - 19968: jis0208<<14 | 0x12<<7 | 0x17, + 33996 - 19968: jis0212<<14 | 0x37<<7 | 0x5B, + 33997 - 19968: jis0208<<14 | 0x47<<7 | 0x48, + 33999 - 19968: jis0212<<14 | 0x37<<7 | 0x5C, + 34000 - 19968: jis0208<<14 | 0x47<<7 | 0x4B, + 34001 - 19968: jis0208<<14 | 0x2B<<7 | 0x0B, + 34003 - 19968: jis0212<<14 | 0x37<<7 | 0x5D, + 34006 - 19968: jis0208<<14 | 0x47<<7 | 0x4E, + 34009 - 19968: jis0208<<14 | 0x47<<7 | 0x47, + 34010 - 19968: jis0208<<14 | 0x47<<7 | 0x4A, + 34012 - 19968: jis0208<<14 | 0x58<<7 | 0x04, + 34023 - 19968: jis0212<<14 | 0x38<<7 | 0x01, + 34026 - 19968: jis0212<<14 | 0x38<<7 | 0x02, + 34028 - 19968: jis0208<<14 | 0x2A<<7 | 0x08, + 34030 - 19968: jis0208<<14 | 0x2E<<7 | 0x00, + 34031 - 19968: jis0212<<14 | 0x38<<7 | 0x03, + 34032 - 19968: jis0212<<14 | 0x38<<7 | 0x04, + 34033 - 19968: jis0212<<14 | 0x38<<7 | 0x05, + 34034 - 19968: jis0212<<14 | 0x38<<7 | 0x06, + 34036 - 19968: jis0208<<14 | 0x47<<7 | 0x52, + 34039 - 19968: jis0212<<14 | 0x38<<7 | 0x07, + 34042 - 19968: jis0212<<14 | 0x38<<7 | 0x09, + 34043 - 19968: jis0212<<14 | 0x38<<7 | 0x0A, + 34044 - 19968: jis0208<<14 | 0x47<<7 | 0x59, + 34045 - 19968: jis0212<<14 | 0x38<<7 | 0x0B, + 34047 - 19968: jis0208<<14 | 0x47<<7 | 0x51, + 34048 - 19968: jis0208<<14 | 0x1B<<7 | 0x22, + 34050 - 19968: jis0212<<14 | 0x38<<7 | 0x0C, + 34051 - 19968: jis0212<<14 | 0x38<<7 | 0x0D, + 34054 - 19968: jis0208<<14 | 0x47<<7 | 0x30, + 34055 - 19968: jis0212<<14 | 0x38<<7 | 0x0E, + 34060 - 19968: jis0212<<14 | 0x38<<7 | 0x0F, + 34062 - 19968: jis0212<<14 | 0x38<<7 | 0x10, + 34064 - 19968: jis0212<<14 | 0x38<<7 | 0x11, + 34065 - 19968: jis0208<<14 | 0x29<<7 | 0x2D, + 34067 - 19968: jis0208<<14 | 0x2B<<7 | 0x01, + 34068 - 19968: jis0208<<14 | 0x47<<7 | 0x58, + 34069 - 19968: jis0208<<14 | 0x47<<7 | 0x57, + 34071 - 19968: jis0208<<14 | 0x47<<7 | 0x53, + 34072 - 19968: jis0208<<14 | 0x47<<7 | 0x54, + 34074 - 19968: jis0208<<14 | 0x10<<7 | 0x15, + 34076 - 19968: jis0212<<14 | 0x38<<7 | 0x12, + 34078 - 19968: jis0212<<14 | 0x38<<7 | 0x13, + 34079 - 19968: jis0208<<14 | 0x47<<7 | 0x56, + 34081 - 19968: jis0208<<14 | 0x47<<7 | 0x50, + 34082 - 19968: jis0212<<14 | 0x38<<7 | 0x14, + 34083 - 19968: jis0212<<14 | 0x38<<7 | 0x15, + 34084 - 19968: jis0212<<14 | 0x38<<7 | 0x16, + 34085 - 19968: jis0212<<14 | 0x38<<7 | 0x17, + 34086 - 19968: jis0208<<14 | 0x23<<7 | 0x34, + 34087 - 19968: jis0212<<14 | 0x38<<7 | 0x18, + 34090 - 19968: jis0212<<14 | 0x38<<7 | 0x19, + 34091 - 19968: jis0212<<14 | 0x38<<7 | 0x1A, + 34092 - 19968: jis0208<<14 | 0x47<<7 | 0x55, + 34093 - 19968: jis0208<<14 | 0x0F<<7 | 0x5D, + 34095 - 19968: jis0212<<14 | 0x38<<7 | 0x1B, + 34098 - 19968: jis0212<<14 | 0x38<<7 | 0x08, + 34099 - 19968: jis0212<<14 | 0x38<<7 | 0x1C, + 34100 - 19968: jis0212<<14 | 0x38<<7 | 0x1D, + 34101 - 19968: jis0208<<14 | 0x21<<7 | 0x01, + 34102 - 19968: jis0212<<14 | 0x38<<7 | 0x1E, + 34109 - 19968: jis0208<<14 | 0x29<<7 | 0x22, + 34111 - 19968: jis0212<<14 | 0x38<<7 | 0x1F, + 34112 - 19968: jis0208<<14 | 0x47<<7 | 0x5A, + 34113 - 19968: jis0208<<14 | 0x48<<7 | 0x00, + 34115 - 19968: jis0208<<14 | 0x27<<7 | 0x38, + 34118 - 19968: jis0212<<14 | 0x38<<7 | 0x20, + 34120 - 19968: jis0208<<14 | 0x47<<7 | 0x5D, + 34121 - 19968: jis0208<<14 | 0x1D<<7 | 0x35, + 34122 - 19968: jis0208<<14 | 0x1B<<7 | 0x28, + 34123 - 19968: jis0208<<14 | 0x48<<7 | 0x02, + 34126 - 19968: jis0208<<14 | 0x15<<7 | 0x1D, + 34127 - 19968: jis0212<<14 | 0x38<<7 | 0x21, + 34128 - 19968: jis0212<<14 | 0x38<<7 | 0x22, + 34129 - 19968: jis0212<<14 | 0x38<<7 | 0x23, + 34130 - 19968: jis0212<<14 | 0x38<<7 | 0x24, + 34131 - 19968: jis0208<<14 | 0x5A<<7 | 0x3D, + 34133 - 19968: jis0208<<14 | 0x48<<7 | 0x03, + 34134 - 19968: jis0212<<14 | 0x38<<7 | 0x26, + 34135 - 19968: jis0208<<14 | 0x28<<7 | 0x58, + 34136 - 19968: jis0208<<14 | 0x47<<7 | 0x5C, + 34137 - 19968: jis0208<<14 | 0x5A<<7 | 0x3E, + 34138 - 19968: jis0208<<14 | 0x47<<7 | 0x35, + 34140 - 19968: jis0212<<14 | 0x38<<7 | 0x28, + 34141 - 19968: jis0212<<14 | 0x38<<7 | 0x29, + 34142 - 19968: jis0212<<14 | 0x38<<7 | 0x2A, + 34143 - 19968: jis0212<<14 | 0x38<<7 | 0x2B, + 34144 - 19968: jis0212<<14 | 0x38<<7 | 0x2C, + 34145 - 19968: jis0212<<14 | 0x38<<7 | 0x2D, + 34146 - 19968: jis0212<<14 | 0x38<<7 | 0x2E, + 34147 - 19968: jis0208<<14 | 0x47<<7 | 0x5B, + 34148 - 19968: jis0212<<14 | 0x38<<7 | 0x2F, + 34152 - 19968: jis0208<<14 | 0x2E<<7 | 0x2E, + 34153 - 19968: jis0208<<14 | 0x25<<7 | 0x01, + 34154 - 19968: jis0208<<14 | 0x28<<7 | 0x52, + 34155 - 19968: jis0208<<14 | 0x5A<<7 | 0x3F, + 34157 - 19968: jis0208<<14 | 0x48<<7 | 0x0A, + 34159 - 19968: jis0212<<14 | 0x38<<7 | 0x31, + 34167 - 19968: jis0208<<14 | 0x48<<7 | 0x10, + 34169 - 19968: jis0212<<14 | 0x38<<7 | 0x32, + 34170 - 19968: jis0212<<14 | 0x38<<7 | 0x33, + 34171 - 19968: jis0212<<14 | 0x38<<7 | 0x34, + 34173 - 19968: jis0212<<14 | 0x38<<7 | 0x35, + 34174 - 19968: jis0208<<14 | 0x48<<7 | 0x11, + 34175 - 19968: jis0212<<14 | 0x38<<7 | 0x36, + 34176 - 19968: jis0208<<14 | 0x48<<7 | 0x04, + 34177 - 19968: jis0212<<14 | 0x38<<7 | 0x37, + 34180 - 19968: jis0208<<14 | 0x26<<7 | 0x55, + 34181 - 19968: jis0212<<14 | 0x38<<7 | 0x38, + 34182 - 19968: jis0212<<14 | 0x38<<7 | 0x39, + 34183 - 19968: jis0208<<14 | 0x48<<7 | 0x0E, + 34184 - 19968: jis0208<<14 | 0x48<<7 | 0x06, + 34185 - 19968: jis0212<<14 | 0x38<<7 | 0x3A, + 34186 - 19968: jis0208<<14 | 0x48<<7 | 0x08, + 34187 - 19968: jis0212<<14 | 0x38<<7 | 0x3B, + 34188 - 19968: jis0212<<14 | 0x38<<7 | 0x3C, + 34191 - 19968: jis0212<<14 | 0x38<<7 | 0x3D, + 34192 - 19968: jis0208<<14 | 0x48<<7 | 0x12, + 34193 - 19968: jis0208<<14 | 0x48<<7 | 0x07, + 34195 - 19968: jis0212<<14 | 0x38<<7 | 0x3E, + 34196 - 19968: jis0208<<14 | 0x48<<7 | 0x0B, + 34199 - 19968: jis0208<<14 | 0x10<<7 | 0x51, + 34200 - 19968: jis0212<<14 | 0x38<<7 | 0x3F, + 34201 - 19968: jis0208<<14 | 0x25<<7 | 0x44, + 34203 - 19968: jis0208<<14 | 0x48<<7 | 0x0C, + 34204 - 19968: jis0208<<14 | 0x48<<7 | 0x0F, + 34205 - 19968: jis0212<<14 | 0x38<<7 | 0x40, + 34207 - 19968: jis0212<<14 | 0x38<<7 | 0x41, + 34208 - 19968: jis0212<<14 | 0x38<<7 | 0x42, + 34210 - 19968: jis0212<<14 | 0x38<<7 | 0x43, + 34212 - 19968: jis0208<<14 | 0x48<<7 | 0x05, + 34213 - 19968: jis0212<<14 | 0x38<<7 | 0x44, + 34214 - 19968: jis0208<<14 | 0x20<<7 | 0x05, + 34215 - 19968: jis0212<<14 | 0x38<<7 | 0x45, + 34216 - 19968: jis0208<<14 | 0x48<<7 | 0x09, + 34217 - 19968: jis0208<<14 | 0x1A<<7 | 0x06, + 34218 - 19968: jis0208<<14 | 0x1E<<7 | 0x24, + 34219 - 19968: jis0208<<14 | 0x16<<7 | 0x0F, + 34220 - 19968: jis0208<<14 | 0x2B<<7 | 0x53, + 34221 - 19968: jis0212<<14 | 0x38<<7 | 0x53, + 34222 - 19968: jis0208<<14 | 0x2B<<7 | 0x58, + 34223 - 19968: jis0208<<14 | 0x1C<<7 | 0x51, + 34224 - 19968: jis0208<<14 | 0x5A<<7 | 0x41, + 34228 - 19968: jis0212<<14 | 0x38<<7 | 0x46, + 34230 - 19968: jis0212<<14 | 0x38<<7 | 0x47, + 34231 - 19968: jis0212<<14 | 0x38<<7 | 0x48, + 34232 - 19968: jis0212<<14 | 0x38<<7 | 0x49, + 34233 - 19968: jis0208<<14 | 0x48<<7 | 0x16, + 34234 - 19968: jis0208<<14 | 0x48<<7 | 0x14, + 34236 - 19968: jis0212<<14 | 0x38<<7 | 0x4A, + 34237 - 19968: jis0212<<14 | 0x38<<7 | 0x4B, + 34238 - 19968: jis0212<<14 | 0x38<<7 | 0x4C, + 34239 - 19968: jis0212<<14 | 0x38<<7 | 0x4D, + 34241 - 19968: jis0208<<14 | 0x2E<<7 | 0x2D, + 34242 - 19968: jis0212<<14 | 0x38<<7 | 0x4E, + 34247 - 19968: jis0212<<14 | 0x38<<7 | 0x4F, + 34249 - 19968: jis0208<<14 | 0x48<<7 | 0x13, + 34250 - 19968: jis0212<<14 | 0x38<<7 | 0x50, + 34251 - 19968: jis0212<<14 | 0x38<<7 | 0x51, + 34253 - 19968: jis0208<<14 | 0x2C<<7 | 0x54, + 34254 - 19968: jis0212<<14 | 0x38<<7 | 0x52, + 34255 - 19968: jis0208<<14 | 0x48<<7 | 0x15, + 34256 - 19968: jis0208<<14 | 0x48<<7 | 0x17, + 34261 - 19968: jis0208<<14 | 0x48<<7 | 0x18, + 34264 - 19968: jis0212<<14 | 0x38<<7 | 0x54, + 34266 - 19968: jis0212<<14 | 0x38<<7 | 0x55, + 34268 - 19968: jis0208<<14 | 0x48<<7 | 0x1B, + 34269 - 19968: jis0208<<14 | 0x48<<7 | 0x19, + 34271 - 19968: jis0212<<14 | 0x38<<7 | 0x56, + 34272 - 19968: jis0212<<14 | 0x38<<7 | 0x57, + 34276 - 19968: jis0208<<14 | 0x25<<7 | 0x02, + 34277 - 19968: jis0208<<14 | 0x48<<7 | 0x1A, + 34278 - 19968: jis0212<<14 | 0x38<<7 | 0x58, + 34280 - 19968: jis0212<<14 | 0x38<<7 | 0x59, + 34281 - 19968: jis0208<<14 | 0x27<<7 | 0x2C, + 34282 - 19968: jis0208<<14 | 0x48<<7 | 0x0D, + 34285 - 19968: jis0212<<14 | 0x38<<7 | 0x5A, + 34291 - 19968: jis0212<<14 | 0x38<<7 | 0x5B, + 34294 - 19968: jis0212<<14 | 0x38<<7 | 0x5C, + 34295 - 19968: jis0208<<14 | 0x1C<<7 | 0x52, + 34297 - 19968: jis0208<<14 | 0x48<<7 | 0x1C, + 34298 - 19968: jis0208<<14 | 0x48<<7 | 0x21, + 34299 - 19968: jis0208<<14 | 0x20<<7 | 0x53, + 34300 - 19968: jis0212<<14 | 0x38<<7 | 0x5D, + 34302 - 19968: jis0208<<14 | 0x48<<7 | 0x20, + 34303 - 19968: jis0212<<14 | 0x39<<7 | 0x00, + 34304 - 19968: jis0212<<14 | 0x39<<7 | 0x01, + 34306 - 19968: jis0208<<14 | 0x48<<7 | 0x01, + 34308 - 19968: jis0212<<14 | 0x39<<7 | 0x02, + 34309 - 19968: jis0212<<14 | 0x39<<7 | 0x03, + 34310 - 19968: jis0208<<14 | 0x48<<7 | 0x22, + 34311 - 19968: jis0208<<14 | 0x20<<7 | 0x28, + 34314 - 19968: jis0208<<14 | 0x48<<7 | 0x1D, + 34315 - 19968: jis0208<<14 | 0x48<<7 | 0x1F, + 34317 - 19968: jis0212<<14 | 0x39<<7 | 0x04, + 34318 - 19968: jis0212<<14 | 0x39<<7 | 0x05, + 34320 - 19968: jis0212<<14 | 0x39<<7 | 0x06, + 34321 - 19968: jis0212<<14 | 0x39<<7 | 0x07, + 34322 - 19968: jis0212<<14 | 0x39<<7 | 0x08, + 34323 - 19968: jis0208<<14 | 0x48<<7 | 0x1E, + 34326 - 19968: jis0208<<14 | 0x3C<<7 | 0x10, + 34327 - 19968: jis0208<<14 | 0x3C<<7 | 0x01, + 34328 - 19968: jis0212<<14 | 0x39<<7 | 0x09, + 34329 - 19968: jis0212<<14 | 0x39<<7 | 0x0A, + 34330 - 19968: jis0208<<14 | 0x48<<7 | 0x24, + 34331 - 19968: jis0212<<14 | 0x39<<7 | 0x0B, + 34334 - 19968: jis0212<<14 | 0x39<<7 | 0x0C, + 34337 - 19968: jis0212<<14 | 0x39<<7 | 0x0D, + 34338 - 19968: jis0208<<14 | 0x48<<7 | 0x23, + 34343 - 19968: jis0212<<14 | 0x39<<7 | 0x0E, + 34345 - 19968: jis0212<<14 | 0x39<<7 | 0x0F, + 34349 - 19968: jis0208<<14 | 0x2C<<7 | 0x55, + 34351 - 19968: jis0208<<14 | 0x41<<7 | 0x1B, + 34352 - 19968: jis0208<<14 | 0x48<<7 | 0x25, + 34358 - 19968: jis0212<<14 | 0x39<<7 | 0x10, + 34360 - 19968: jis0212<<14 | 0x39<<7 | 0x11, + 34362 - 19968: jis0212<<14 | 0x39<<7 | 0x12, + 34364 - 19968: jis0212<<14 | 0x39<<7 | 0x13, + 34365 - 19968: jis0212<<14 | 0x39<<7 | 0x14, + 34367 - 19968: jis0208<<14 | 0x48<<7 | 0x26, + 34368 - 19968: jis0212<<14 | 0x39<<7 | 0x15, + 34369 - 19968: jis0212<<14 | 0x17<<7 | 0x45, + 34370 - 19968: jis0212<<14 | 0x39<<7 | 0x16, + 34374 - 19968: jis0212<<14 | 0x39<<7 | 0x17, + 34381 - 19968: jis0208<<14 | 0x48<<7 | 0x27, + 34382 - 19968: jis0208<<14 | 0x17<<7 | 0x36, + 34384 - 19968: jis0208<<14 | 0x14<<7 | 0x33, + 34386 - 19968: jis0212<<14 | 0x39<<7 | 0x18, + 34387 - 19968: jis0212<<14 | 0x39<<7 | 0x19, + 34388 - 19968: jis0208<<14 | 0x48<<7 | 0x29, + 34389 - 19968: jis0208<<14 | 0x30<<7 | 0x3C, + 34390 - 19968: jis0212<<14 | 0x39<<7 | 0x1A, + 34391 - 19968: jis0212<<14 | 0x39<<7 | 0x1B, + 34392 - 19968: jis0212<<14 | 0x39<<7 | 0x1C, + 34393 - 19968: jis0212<<14 | 0x39<<7 | 0x1D, + 34394 - 19968: jis0208<<14 | 0x14<<7 | 0x54, + 34396 - 19968: jis0208<<14 | 0x2D<<7 | 0x19, + 34397 - 19968: jis0212<<14 | 0x39<<7 | 0x1E, + 34398 - 19968: jis0208<<14 | 0x15<<7 | 0x52, + 34399 - 19968: jis0208<<14 | 0x48<<7 | 0x2A, + 34400 - 19968: jis0212<<14 | 0x39<<7 | 0x1F, + 34401 - 19968: jis0212<<14 | 0x39<<7 | 0x20, + 34402 - 19968: jis0212<<14 | 0x39<<7 | 0x21, + 34403 - 19968: jis0212<<14 | 0x39<<7 | 0x22, + 34404 - 19968: jis0212<<14 | 0x39<<7 | 0x23, + 34407 - 19968: jis0208<<14 | 0x48<<7 | 0x2B, + 34409 - 19968: jis0212<<14 | 0x39<<7 | 0x24, + 34411 - 19968: jis0208<<14 | 0x22<<7 | 0x4D, + 34412 - 19968: jis0212<<14 | 0x39<<7 | 0x25, + 34415 - 19968: jis0212<<14 | 0x39<<7 | 0x26, + 34417 - 19968: jis0208<<14 | 0x48<<7 | 0x2C, + 34421 - 19968: jis0212<<14 | 0x39<<7 | 0x27, + 34422 - 19968: jis0212<<14 | 0x39<<7 | 0x28, + 34423 - 19968: jis0212<<14 | 0x39<<7 | 0x29, + 34425 - 19968: jis0208<<14 | 0x25<<7 | 0x59, + 34426 - 19968: jis0212<<14 | 0x39<<7 | 0x2A, + 34427 - 19968: jis0208<<14 | 0x0F<<7 | 0x19, + 34440 - 19968: jis0212<<14 | 0x39<<7 | 0x4C, + 34442 - 19968: jis0208<<14 | 0x11<<7 | 0x42, + 34443 - 19968: jis0208<<14 | 0x48<<7 | 0x31, + 34444 - 19968: jis0208<<14 | 0x48<<7 | 0x32, + 34445 - 19968: jis0212<<14 | 0x39<<7 | 0x2B, + 34449 - 19968: jis0212<<14 | 0x39<<7 | 0x2C, + 34451 - 19968: jis0208<<14 | 0x48<<7 | 0x2D, + 34453 - 19968: jis0208<<14 | 0x1A<<7 | 0x1C, + 34454 - 19968: jis0212<<14 | 0x39<<7 | 0x2D, + 34456 - 19968: jis0212<<14 | 0x39<<7 | 0x2E, + 34458 - 19968: jis0212<<14 | 0x39<<7 | 0x2F, + 34460 - 19968: jis0212<<14 | 0x39<<7 | 0x30, + 34465 - 19968: jis0212<<14 | 0x39<<7 | 0x31, + 34467 - 19968: jis0208<<14 | 0x48<<7 | 0x2E, + 34468 - 19968: jis0208<<14 | 0x26<<7 | 0x21, + 34470 - 19968: jis0212<<14 | 0x39<<7 | 0x32, + 34471 - 19968: jis0212<<14 | 0x39<<7 | 0x33, + 34472 - 19968: jis0212<<14 | 0x39<<7 | 0x34, + 34473 - 19968: jis0208<<14 | 0x48<<7 | 0x2F, + 34474 - 19968: jis0208<<14 | 0x48<<7 | 0x30, + 34475 - 19968: jis0208<<14 | 0x48<<7 | 0x3A, + 34477 - 19968: jis0212<<14 | 0x39<<7 | 0x35, + 34479 - 19968: jis0208<<14 | 0x48<<7 | 0x34, + 34480 - 19968: jis0208<<14 | 0x48<<7 | 0x37, + 34481 - 19968: jis0212<<14 | 0x39<<7 | 0x36, + 34483 - 19968: jis0212<<14 | 0x39<<7 | 0x37, + 34484 - 19968: jis0212<<14 | 0x39<<7 | 0x38, + 34485 - 19968: jis0212<<14 | 0x39<<7 | 0x39, + 34486 - 19968: jis0208<<14 | 0x48<<7 | 0x33, + 34487 - 19968: jis0212<<14 | 0x39<<7 | 0x3A, + 34488 - 19968: jis0212<<14 | 0x39<<7 | 0x3B, + 34489 - 19968: jis0212<<14 | 0x39<<7 | 0x3C, + 34495 - 19968: jis0212<<14 | 0x39<<7 | 0x3D, + 34496 - 19968: jis0212<<14 | 0x39<<7 | 0x3E, + 34497 - 19968: jis0212<<14 | 0x39<<7 | 0x3F, + 34499 - 19968: jis0212<<14 | 0x39<<7 | 0x40, + 34500 - 19968: jis0208<<14 | 0x48<<7 | 0x35, + 34501 - 19968: jis0212<<14 | 0x39<<7 | 0x41, + 34502 - 19968: jis0208<<14 | 0x48<<7 | 0x36, + 34503 - 19968: jis0208<<14 | 0x1B<<7 | 0x37, + 34505 - 19968: jis0208<<14 | 0x48<<7 | 0x38, + 34507 - 19968: jis0208<<14 | 0x22<<7 | 0x20, + 34509 - 19968: jis0208<<14 | 0x16<<7 | 0x35, + 34510 - 19968: jis0208<<14 | 0x12<<7 | 0x21, + 34513 - 19968: jis0212<<14 | 0x39<<7 | 0x42, + 34514 - 19968: jis0212<<14 | 0x39<<7 | 0x43, + 34516 - 19968: jis0208<<14 | 0x48<<7 | 0x3B, + 34517 - 19968: jis0212<<14 | 0x39<<7 | 0x44, + 34519 - 19968: jis0212<<14 | 0x39<<7 | 0x45, + 34521 - 19968: jis0208<<14 | 0x12<<7 | 0x1E, + 34522 - 19968: jis0212<<14 | 0x39<<7 | 0x46, + 34523 - 19968: jis0208<<14 | 0x48<<7 | 0x40, + 34524 - 19968: jis0212<<14 | 0x39<<7 | 0x47, + 34526 - 19968: jis0208<<14 | 0x48<<7 | 0x3C, + 34527 - 19968: jis0208<<14 | 0x48<<7 | 0x3F, + 34528 - 19968: jis0212<<14 | 0x39<<7 | 0x48, + 34531 - 19968: jis0212<<14 | 0x39<<7 | 0x49, + 34532 - 19968: jis0208<<14 | 0x27<<7 | 0x19, + 34533 - 19968: jis0212<<14 | 0x39<<7 | 0x4A, + 34535 - 19968: jis0212<<14 | 0x39<<7 | 0x4B, + 34537 - 19968: jis0208<<14 | 0x48<<7 | 0x3D, + 34540 - 19968: jis0208<<14 | 0x48<<7 | 0x3E, + 34541 - 19968: jis0208<<14 | 0x28<<7 | 0x27, + 34542 - 19968: jis0208<<14 | 0x27<<7 | 0x39, + 34543 - 19968: jis0208<<14 | 0x48<<7 | 0x41, + 34552 - 19968: jis0208<<14 | 0x21<<7 | 0x5C, + 34553 - 19968: jis0208<<14 | 0x48<<7 | 0x4B, + 34554 - 19968: jis0212<<14 | 0x39<<7 | 0x4D, + 34555 - 19968: jis0208<<14 | 0x48<<7 | 0x47, + 34556 - 19968: jis0212<<14 | 0x39<<7 | 0x4E, + 34557 - 19968: jis0212<<14 | 0x39<<7 | 0x4F, + 34558 - 19968: jis0208<<14 | 0x11<<7 | 0x4A, + 34560 - 19968: jis0208<<14 | 0x48<<7 | 0x45, + 34562 - 19968: jis0208<<14 | 0x2A<<7 | 0x09, + 34563 - 19968: jis0208<<14 | 0x48<<7 | 0x46, + 34564 - 19968: jis0212<<14 | 0x39<<7 | 0x50, + 34565 - 19968: jis0212<<14 | 0x39<<7 | 0x51, + 34566 - 19968: jis0208<<14 | 0x48<<7 | 0x43, + 34567 - 19968: jis0212<<14 | 0x39<<7 | 0x52, + 34568 - 19968: jis0208<<14 | 0x48<<7 | 0x44, + 34569 - 19968: jis0208<<14 | 0x48<<7 | 0x49, + 34570 - 19968: jis0208<<14 | 0x48<<7 | 0x4C, + 34571 - 19968: jis0212<<14 | 0x39<<7 | 0x53, + 34573 - 19968: jis0208<<14 | 0x48<<7 | 0x4A, + 34574 - 19968: jis0212<<14 | 0x39<<7 | 0x54, + 34575 - 19968: jis0212<<14 | 0x39<<7 | 0x55, + 34576 - 19968: jis0212<<14 | 0x39<<7 | 0x56, + 34577 - 19968: jis0208<<14 | 0x48<<7 | 0x48, + 34578 - 19968: jis0208<<14 | 0x48<<7 | 0x42, + 34579 - 19968: jis0212<<14 | 0x39<<7 | 0x57, + 34580 - 19968: jis0212<<14 | 0x39<<7 | 0x58, + 34584 - 19968: jis0208<<14 | 0x22<<7 | 0x37, + 34585 - 19968: jis0212<<14 | 0x39<<7 | 0x59, + 34586 - 19968: jis0208<<14 | 0x48<<7 | 0x53, + 34588 - 19968: jis0208<<14 | 0x2B<<7 | 0x09, + 34590 - 19968: jis0212<<14 | 0x39<<7 | 0x5A, + 34591 - 19968: jis0212<<14 | 0x39<<7 | 0x5B, + 34593 - 19968: jis0212<<14 | 0x39<<7 | 0x5C, + 34595 - 19968: jis0212<<14 | 0x39<<7 | 0x5D, + 34597 - 19968: jis0208<<14 | 0x48<<7 | 0x51, + 34600 - 19968: jis0212<<14 | 0x3A<<7 | 0x00, + 34601 - 19968: jis0208<<14 | 0x48<<7 | 0x52, + 34606 - 19968: jis0212<<14 | 0x3A<<7 | 0x01, + 34607 - 19968: jis0212<<14 | 0x3A<<7 | 0x02, + 34609 - 19968: jis0212<<14 | 0x3A<<7 | 0x03, + 34610 - 19968: jis0212<<14 | 0x3A<<7 | 0x04, + 34612 - 19968: jis0208<<14 | 0x48<<7 | 0x4D, + 34615 - 19968: jis0208<<14 | 0x48<<7 | 0x4F, + 34617 - 19968: jis0212<<14 | 0x3A<<7 | 0x05, + 34618 - 19968: jis0212<<14 | 0x3A<<7 | 0x06, + 34619 - 19968: jis0208<<14 | 0x48<<7 | 0x50, + 34620 - 19968: jis0212<<14 | 0x3A<<7 | 0x07, + 34621 - 19968: jis0212<<14 | 0x3A<<7 | 0x08, + 34622 - 19968: jis0212<<14 | 0x3A<<7 | 0x09, + 34623 - 19968: jis0208<<14 | 0x48<<7 | 0x4E, + 34624 - 19968: jis0212<<14 | 0x3A<<7 | 0x0A, + 34627 - 19968: jis0212<<14 | 0x3A<<7 | 0x0B, + 34629 - 19968: jis0212<<14 | 0x3A<<7 | 0x0C, + 34633 - 19968: jis0208<<14 | 0x1F<<7 | 0x45, + 34635 - 19968: jis0208<<14 | 0x2E<<7 | 0x18, + 34636 - 19968: jis0208<<14 | 0x48<<7 | 0x57, + 34637 - 19968: jis0212<<14 | 0x3A<<7 | 0x0D, + 34638 - 19968: jis0208<<14 | 0x48<<7 | 0x58, + 34643 - 19968: jis0208<<14 | 0x49<<7 | 0x00, + 34645 - 19968: jis0208<<14 | 0x1E<<7 | 0x09, + 34647 - 19968: jis0208<<14 | 0x48<<7 | 0x5A, + 34648 - 19968: jis0212<<14 | 0x3A<<7 | 0x0E, + 34649 - 19968: jis0208<<14 | 0x48<<7 | 0x5D, + 34653 - 19968: jis0212<<14 | 0x3A<<7 | 0x0F, + 34655 - 19968: jis0208<<14 | 0x48<<7 | 0x55, + 34656 - 19968: jis0208<<14 | 0x48<<7 | 0x54, + 34657 - 19968: jis0212<<14 | 0x3A<<7 | 0x10, + 34659 - 19968: jis0208<<14 | 0x49<<7 | 0x01, + 34660 - 19968: jis0212<<14 | 0x3A<<7 | 0x11, + 34661 - 19968: jis0212<<14 | 0x3A<<7 | 0x12, + 34662 - 19968: jis0208<<14 | 0x11<<7 | 0x3B, + 34664 - 19968: jis0208<<14 | 0x48<<7 | 0x5B, + 34666 - 19968: jis0208<<14 | 0x49<<7 | 0x02, + 34670 - 19968: jis0208<<14 | 0x48<<7 | 0x5C, + 34671 - 19968: jis0212<<14 | 0x3A<<7 | 0x13, + 34673 - 19968: jis0212<<14 | 0x3A<<7 | 0x14, + 34674 - 19968: jis0212<<14 | 0x3A<<7 | 0x15, + 34676 - 19968: jis0208<<14 | 0x48<<7 | 0x59, + 34678 - 19968: jis0208<<14 | 0x23<<7 | 0x12, + 34680 - 19968: jis0208<<14 | 0x48<<7 | 0x56, + 34683 - 19968: jis0212<<14 | 0x3A<<7 | 0x16, + 34687 - 19968: jis0208<<14 | 0x26<<7 | 0x47, + 34690 - 19968: jis0208<<14 | 0x49<<7 | 0x06, + 34691 - 19968: jis0212<<14 | 0x3A<<7 | 0x17, + 34692 - 19968: jis0212<<14 | 0x3A<<7 | 0x18, + 34693 - 19968: jis0212<<14 | 0x3A<<7 | 0x19, + 34694 - 19968: jis0212<<14 | 0x3A<<7 | 0x1A, + 34695 - 19968: jis0212<<14 | 0x3A<<7 | 0x1B, + 34696 - 19968: jis0212<<14 | 0x3A<<7 | 0x1C, + 34697 - 19968: jis0212<<14 | 0x3A<<7 | 0x1D, + 34699 - 19968: jis0212<<14 | 0x3A<<7 | 0x1E, + 34700 - 19968: jis0212<<14 | 0x3A<<7 | 0x1F, + 34701 - 19968: jis0208<<14 | 0x2C<<7 | 0x1A, + 34704 - 19968: jis0212<<14 | 0x3A<<7 | 0x20, + 34707 - 19968: jis0212<<14 | 0x3A<<7 | 0x21, + 34709 - 19968: jis0212<<14 | 0x3A<<7 | 0x22, + 34711 - 19968: jis0212<<14 | 0x3A<<7 | 0x23, + 34712 - 19968: jis0212<<14 | 0x3A<<7 | 0x24, + 34713 - 19968: jis0212<<14 | 0x3A<<7 | 0x25, + 34718 - 19968: jis0212<<14 | 0x3A<<7 | 0x26, + 34719 - 19968: jis0208<<14 | 0x49<<7 | 0x05, + 34720 - 19968: jis0212<<14 | 0x3A<<7 | 0x27, + 34722 - 19968: jis0208<<14 | 0x49<<7 | 0x04, + 34723 - 19968: jis0212<<14 | 0x3A<<7 | 0x28, + 34727 - 19968: jis0212<<14 | 0x3A<<7 | 0x29, + 34731 - 19968: jis0208<<14 | 0x49<<7 | 0x0D, + 34732 - 19968: jis0212<<14 | 0x3A<<7 | 0x2A, + 34733 - 19968: jis0212<<14 | 0x3A<<7 | 0x2B, + 34734 - 19968: jis0212<<14 | 0x3A<<7 | 0x2C, + 34735 - 19968: jis0208<<14 | 0x49<<7 | 0x07, + 34737 - 19968: jis0212<<14 | 0x3A<<7 | 0x2D, + 34739 - 19968: jis0208<<14 | 0x49<<7 | 0x0F, + 34741 - 19968: jis0212<<14 | 0x3A<<7 | 0x2E, + 34746 - 19968: jis0208<<14 | 0x2C<<7 | 0x45, + 34747 - 19968: jis0208<<14 | 0x49<<7 | 0x12, + 34749 - 19968: jis0208<<14 | 0x49<<7 | 0x09, + 34750 - 19968: jis0212<<14 | 0x3A<<7 | 0x2F, + 34751 - 19968: jis0212<<14 | 0x3A<<7 | 0x30, + 34752 - 19968: jis0208<<14 | 0x49<<7 | 0x0A, + 34753 - 19968: jis0212<<14 | 0x3A<<7 | 0x31, + 34756 - 19968: jis0208<<14 | 0x49<<7 | 0x0E, + 34758 - 19968: jis0208<<14 | 0x49<<7 | 0x11, + 34759 - 19968: jis0208<<14 | 0x49<<7 | 0x10, + 34760 - 19968: jis0212<<14 | 0x3A<<7 | 0x32, + 34761 - 19968: jis0212<<14 | 0x3A<<7 | 0x33, + 34762 - 19968: jis0212<<14 | 0x3A<<7 | 0x34, + 34763 - 19968: jis0208<<14 | 0x49<<7 | 0x08, + 34766 - 19968: jis0212<<14 | 0x3A<<7 | 0x35, + 34768 - 19968: jis0208<<14 | 0x49<<7 | 0x0B, + 34770 - 19968: jis0208<<14 | 0x49<<7 | 0x1C, + 34773 - 19968: jis0212<<14 | 0x3A<<7 | 0x36, + 34774 - 19968: jis0212<<14 | 0x3A<<7 | 0x37, + 34777 - 19968: jis0212<<14 | 0x3A<<7 | 0x38, + 34778 - 19968: jis0212<<14 | 0x3A<<7 | 0x39, + 34780 - 19968: jis0212<<14 | 0x3A<<7 | 0x3A, + 34783 - 19968: jis0212<<14 | 0x3A<<7 | 0x3B, + 34784 - 19968: jis0208<<14 | 0x49<<7 | 0x15, + 34786 - 19968: jis0212<<14 | 0x3A<<7 | 0x3C, + 34787 - 19968: jis0212<<14 | 0x3A<<7 | 0x3D, + 34788 - 19968: jis0212<<14 | 0x3A<<7 | 0x3E, + 34794 - 19968: jis0212<<14 | 0x3A<<7 | 0x3F, + 34795 - 19968: jis0212<<14 | 0x3A<<7 | 0x40, + 34797 - 19968: jis0212<<14 | 0x3A<<7 | 0x41, + 34799 - 19968: jis0208<<14 | 0x49<<7 | 0x13, + 34801 - 19968: jis0212<<14 | 0x3A<<7 | 0x42, + 34802 - 19968: jis0208<<14 | 0x49<<7 | 0x14, + 34803 - 19968: jis0212<<14 | 0x3A<<7 | 0x43, + 34806 - 19968: jis0208<<14 | 0x49<<7 | 0x19, + 34807 - 19968: jis0208<<14 | 0x49<<7 | 0x1A, + 34808 - 19968: jis0212<<14 | 0x3A<<7 | 0x44, + 34809 - 19968: jis0208<<14 | 0x12<<7 | 0x09, + 34810 - 19968: jis0212<<14 | 0x3A<<7 | 0x45, + 34811 - 19968: jis0208<<14 | 0x14<<7 | 0x21, + 34814 - 19968: jis0208<<14 | 0x49<<7 | 0x18, + 34815 - 19968: jis0212<<14 | 0x3A<<7 | 0x46, + 34817 - 19968: jis0212<<14 | 0x3A<<7 | 0x47, + 34819 - 19968: jis0212<<14 | 0x3A<<7 | 0x48, + 34821 - 19968: jis0208<<14 | 0x49<<7 | 0x03, + 34822 - 19968: jis0212<<14 | 0x3A<<7 | 0x49, + 34823 - 19968: jis0208<<14 | 0x5A<<7 | 0x44, + 34825 - 19968: jis0212<<14 | 0x3A<<7 | 0x4A, + 34826 - 19968: jis0212<<14 | 0x3A<<7 | 0x4B, + 34827 - 19968: jis0212<<14 | 0x3A<<7 | 0x4C, + 34829 - 19968: jis0208<<14 | 0x49<<7 | 0x17, + 34830 - 19968: jis0208<<14 | 0x49<<7 | 0x1B, + 34831 - 19968: jis0208<<14 | 0x49<<7 | 0x16, + 34832 - 19968: jis0212<<14 | 0x3A<<7 | 0x4D, + 34833 - 19968: jis0208<<14 | 0x49<<7 | 0x1D, + 34834 - 19968: jis0212<<14 | 0x3A<<7 | 0x4F, + 34835 - 19968: jis0212<<14 | 0x3A<<7 | 0x50, + 34836 - 19968: jis0212<<14 | 0x3A<<7 | 0x51, + 34837 - 19968: jis0208<<14 | 0x49<<7 | 0x1F, + 34838 - 19968: jis0208<<14 | 0x49<<7 | 0x1E, + 34840 - 19968: jis0212<<14 | 0x3A<<7 | 0x52, + 34841 - 19968: jis0212<<14 | 0x3A<<7 | 0x4E, + 34842 - 19968: jis0212<<14 | 0x3A<<7 | 0x53, + 34843 - 19968: jis0212<<14 | 0x3A<<7 | 0x54, + 34844 - 19968: jis0212<<14 | 0x3A<<7 | 0x55, + 34846 - 19968: jis0212<<14 | 0x3A<<7 | 0x56, + 34847 - 19968: jis0212<<14 | 0x3A<<7 | 0x57, + 34849 - 19968: jis0208<<14 | 0x49<<7 | 0x21, + 34850 - 19968: jis0208<<14 | 0x49<<7 | 0x20, + 34851 - 19968: jis0208<<14 | 0x48<<7 | 0x39, + 34855 - 19968: jis0208<<14 | 0x49<<7 | 0x25, + 34856 - 19968: jis0212<<14 | 0x3A<<7 | 0x58, + 34861 - 19968: jis0212<<14 | 0x3A<<7 | 0x59, + 34862 - 19968: jis0212<<14 | 0x3A<<7 | 0x5A, + 34864 - 19968: jis0212<<14 | 0x3A<<7 | 0x5B, + 34865 - 19968: jis0208<<14 | 0x49<<7 | 0x22, + 34866 - 19968: jis0212<<14 | 0x3A<<7 | 0x5C, + 34869 - 19968: jis0212<<14 | 0x3A<<7 | 0x5D, + 34870 - 19968: jis0208<<14 | 0x49<<7 | 0x23, + 34873 - 19968: jis0208<<14 | 0x49<<7 | 0x24, + 34874 - 19968: jis0212<<14 | 0x3B<<7 | 0x00, + 34875 - 19968: jis0208<<14 | 0x49<<7 | 0x26, + 34876 - 19968: jis0212<<14 | 0x3B<<7 | 0x01, + 34880 - 19968: jis0208<<14 | 0x16<<7 | 0x4B, + 34881 - 19968: jis0212<<14 | 0x3B<<7 | 0x02, + 34882 - 19968: jis0208<<14 | 0x49<<7 | 0x28, + 34883 - 19968: jis0212<<14 | 0x3B<<7 | 0x03, + 34884 - 19968: jis0208<<14 | 0x49<<7 | 0x27, + 34885 - 19968: jis0212<<14 | 0x3B<<7 | 0x04, + 34886 - 19968: jis0208<<14 | 0x1C<<7 | 0x0F, + 34888 - 19968: jis0212<<14 | 0x3B<<7 | 0x05, + 34889 - 19968: jis0212<<14 | 0x3B<<7 | 0x06, + 34890 - 19968: jis0212<<14 | 0x3B<<7 | 0x07, + 34891 - 19968: jis0212<<14 | 0x3B<<7 | 0x08, + 34892 - 19968: jis0208<<14 | 0x18<<7 | 0x33, + 34893 - 19968: jis0208<<14 | 0x3D<<7 | 0x06, + 34894 - 19968: jis0212<<14 | 0x3B<<7 | 0x09, + 34897 - 19968: jis0212<<14 | 0x3B<<7 | 0x0A, + 34898 - 19968: jis0208<<14 | 0x49<<7 | 0x29, + 34899 - 19968: jis0208<<14 | 0x1C<<7 | 0x30, + 34901 - 19968: jis0212<<14 | 0x3B<<7 | 0x0B, + 34902 - 19968: jis0212<<14 | 0x3B<<7 | 0x0C, + 34903 - 19968: jis0208<<14 | 0x12<<7 | 0x18, + 34904 - 19968: jis0212<<14 | 0x3B<<7 | 0x0D, + 34905 - 19968: jis0208<<14 | 0x49<<7 | 0x2A, + 34906 - 19968: jis0212<<14 | 0x3B<<7 | 0x0E, + 34907 - 19968: jis0208<<14 | 0x10<<7 | 0x31, + 34908 - 19968: jis0212<<14 | 0x3B<<7 | 0x0F, + 34909 - 19968: jis0208<<14 | 0x1D<<7 | 0x36, + 34910 - 19968: jis0208<<14 | 0x49<<7 | 0x2B, + 34911 - 19968: jis0212<<14 | 0x3B<<7 | 0x10, + 34912 - 19968: jis0212<<14 | 0x3B<<7 | 0x11, + 34913 - 19968: jis0208<<14 | 0x18<<7 | 0x34, + 34914 - 19968: jis0208<<14 | 0x49<<7 | 0x2C, + 34915 - 19968: jis0208<<14 | 0x0F<<7 | 0x40, + 34916 - 19968: jis0212<<14 | 0x3B<<7 | 0x12, + 34920 - 19968: jis0208<<14 | 0x28<<7 | 0x1C, + 34921 - 19968: jis0212<<14 | 0x3B<<7 | 0x13, + 34923 - 19968: jis0208<<14 | 0x49<<7 | 0x2D, + 34928 - 19968: jis0208<<14 | 0x1E<<7 | 0x49, + 34929 - 19968: jis0212<<14 | 0x3B<<7 | 0x14, + 34930 - 19968: jis0208<<14 | 0x49<<7 | 0x34, + 34933 - 19968: jis0208<<14 | 0x49<<7 | 0x31, + 34935 - 19968: jis0208<<14 | 0x22<<7 | 0x4E, + 34937 - 19968: jis0212<<14 | 0x3B<<7 | 0x15, + 34939 - 19968: jis0212<<14 | 0x3B<<7 | 0x16, + 34941 - 19968: jis0208<<14 | 0x49<<7 | 0x32, + 34942 - 19968: jis0208<<14 | 0x49<<7 | 0x2F, + 34943 - 19968: jis0208<<14 | 0x15<<7 | 0x3D, + 34944 - 19968: jis0212<<14 | 0x3B<<7 | 0x17, + 34945 - 19968: jis0208<<14 | 0x49<<7 | 0x2E, + 34946 - 19968: jis0208<<14 | 0x49<<7 | 0x35, + 34952 - 19968: jis0208<<14 | 0x16<<7 | 0x15, + 34955 - 19968: jis0208<<14 | 0x21<<7 | 0x3D, + 34957 - 19968: jis0208<<14 | 0x49<<7 | 0x3B, + 34962 - 19968: jis0208<<14 | 0x49<<7 | 0x37, + 34966 - 19968: jis0208<<14 | 0x21<<7 | 0x14, + 34967 - 19968: jis0208<<14 | 0x49<<7 | 0x36, + 34968 - 19968: jis0212<<14 | 0x3B<<7 | 0x18, + 34969 - 19968: jis0208<<14 | 0x49<<7 | 0x39, + 34970 - 19968: jis0212<<14 | 0x3B<<7 | 0x19, + 34971 - 19968: jis0212<<14 | 0x3B<<7 | 0x1A, + 34972 - 19968: jis0212<<14 | 0x3B<<7 | 0x1B, + 34974 - 19968: jis0208<<14 | 0x49<<7 | 0x30, + 34975 - 19968: jis0212<<14 | 0x3B<<7 | 0x1C, + 34976 - 19968: jis0212<<14 | 0x3B<<7 | 0x1D, + 34978 - 19968: jis0208<<14 | 0x49<<7 | 0x3A, + 34980 - 19968: jis0208<<14 | 0x49<<7 | 0x3C, + 34984 - 19968: jis0212<<14 | 0x3B<<7 | 0x1E, + 34986 - 19968: jis0212<<14 | 0x3B<<7 | 0x1F, + 34987 - 19968: jis0208<<14 | 0x27<<7 | 0x4E, + 34990 - 19968: jis0208<<14 | 0x49<<7 | 0x38, + 34992 - 19968: jis0208<<14 | 0x49<<7 | 0x3D, + 34993 - 19968: jis0208<<14 | 0x49<<7 | 0x3F, + 34996 - 19968: jis0208<<14 | 0x17<<7 | 0x32, + 34997 - 19968: jis0208<<14 | 0x49<<7 | 0x33, + 34999 - 19968: jis0208<<14 | 0x0F<<7 | 0x20, + 35002 - 19968: jis0212<<14 | 0x3B<<7 | 0x20, + 35005 - 19968: jis0212<<14 | 0x3B<<7 | 0x21, + 35006 - 19968: jis0212<<14 | 0x3B<<7 | 0x22, + 35007 - 19968: jis0208<<14 | 0x49<<7 | 0x3E, + 35008 - 19968: jis0212<<14 | 0x3B<<7 | 0x23, + 35009 - 19968: jis0208<<14 | 0x19<<7 | 0x3A, + 35010 - 19968: jis0208<<14 | 0x2D<<7 | 0x55, + 35011 - 19968: jis0208<<14 | 0x49<<7 | 0x40, + 35012 - 19968: jis0208<<14 | 0x49<<7 | 0x41, + 35013 - 19968: jis0208<<14 | 0x20<<7 | 0x54, + 35018 - 19968: jis0212<<14 | 0x3B<<7 | 0x24, + 35019 - 19968: jis0212<<14 | 0x3B<<7 | 0x25, + 35020 - 19968: jis0212<<14 | 0x3B<<7 | 0x26, + 35021 - 19968: jis0212<<14 | 0x3B<<7 | 0x27, + 35022 - 19968: jis0212<<14 | 0x3B<<7 | 0x28, + 35023 - 19968: jis0208<<14 | 0x2D<<7 | 0x01, + 35025 - 19968: jis0212<<14 | 0x3B<<7 | 0x29, + 35026 - 19968: jis0212<<14 | 0x3B<<7 | 0x2A, + 35027 - 19968: jis0212<<14 | 0x3B<<7 | 0x2B, + 35028 - 19968: jis0208<<14 | 0x49<<7 | 0x42, + 35029 - 19968: jis0208<<14 | 0x2C<<7 | 0x14, + 35032 - 19968: jis0208<<14 | 0x49<<7 | 0x43, + 35033 - 19968: jis0208<<14 | 0x49<<7 | 0x44, + 35035 - 19968: jis0212<<14 | 0x3B<<7 | 0x2C, + 35036 - 19968: jis0208<<14 | 0x29<<7 | 0x43, + 35037 - 19968: jis0208<<14 | 0x49<<7 | 0x45, + 35038 - 19968: jis0212<<14 | 0x3B<<7 | 0x2D, + 35039 - 19968: jis0208<<14 | 0x19<<7 | 0x1F, + 35041 - 19968: jis0208<<14 | 0x2D<<7 | 0x02, + 35047 - 19968: jis0212<<14 | 0x3B<<7 | 0x2E, + 35048 - 19968: jis0208<<14 | 0x49<<7 | 0x4A, + 35055 - 19968: jis0212<<14 | 0x3B<<7 | 0x2F, + 35056 - 19968: jis0212<<14 | 0x3B<<7 | 0x30, + 35057 - 19968: jis0212<<14 | 0x3B<<7 | 0x31, + 35058 - 19968: jis0208<<14 | 0x49<<7 | 0x4B, + 35059 - 19968: jis0208<<14 | 0x1D<<7 | 0x37, + 35060 - 19968: jis0208<<14 | 0x49<<7 | 0x49, + 35061 - 19968: jis0208<<14 | 0x5A<<7 | 0x45, + 35063 - 19968: jis0212<<14 | 0x3B<<7 | 0x33, + 35064 - 19968: jis0208<<14 | 0x2C<<7 | 0x46, + 35065 - 19968: jis0208<<14 | 0x49<<7 | 0x46, + 35068 - 19968: jis0208<<14 | 0x49<<7 | 0x48, + 35069 - 19968: jis0208<<14 | 0x1F<<7 | 0x1C, + 35070 - 19968: jis0208<<14 | 0x1E<<7 | 0x5D, + 35073 - 19968: jis0212<<14 | 0x3B<<7 | 0x34, + 35074 - 19968: jis0208<<14 | 0x49<<7 | 0x47, + 35076 - 19968: jis0208<<14 | 0x49<<7 | 0x4C, + 35078 - 19968: jis0212<<14 | 0x3B<<7 | 0x35, + 35079 - 19968: jis0208<<14 | 0x29<<7 | 0x02, + 35082 - 19968: jis0208<<14 | 0x49<<7 | 0x4E, + 35084 - 19968: jis0208<<14 | 0x49<<7 | 0x4D, + 35085 - 19968: jis0212<<14 | 0x3B<<7 | 0x36, + 35086 - 19968: jis0212<<14 | 0x3B<<7 | 0x37, + 35087 - 19968: jis0212<<14 | 0x3B<<7 | 0x38, + 35088 - 19968: jis0208<<14 | 0x12<<7 | 0x4B, + 35090 - 19968: jis0208<<14 | 0x2A<<7 | 0x0A, + 35091 - 19968: jis0208<<14 | 0x49<<7 | 0x4F, + 35093 - 19968: jis0212<<14 | 0x3B<<7 | 0x39, + 35094 - 19968: jis0212<<14 | 0x3B<<7 | 0x3A, + 35096 - 19968: jis0212<<14 | 0x3B<<7 | 0x3B, + 35097 - 19968: jis0212<<14 | 0x3B<<7 | 0x3C, + 35098 - 19968: jis0212<<14 | 0x3B<<7 | 0x3D, + 35100 - 19968: jis0208<<14 | 0x58<<7 | 0x01, + 35101 - 19968: jis0208<<14 | 0x49<<7 | 0x5B, + 35102 - 19968: jis0208<<14 | 0x49<<7 | 0x51, + 35104 - 19968: jis0212<<14 | 0x3B<<7 | 0x3F, + 35109 - 19968: jis0208<<14 | 0x49<<7 | 0x52, + 35110 - 19968: jis0212<<14 | 0x3B<<7 | 0x40, + 35111 - 19968: jis0212<<14 | 0x3B<<7 | 0x41, + 35112 - 19968: jis0212<<14 | 0x3B<<7 | 0x42, + 35114 - 19968: jis0208<<14 | 0x49<<7 | 0x53, + 35115 - 19968: jis0208<<14 | 0x49<<7 | 0x54, + 35120 - 19968: jis0212<<14 | 0x3B<<7 | 0x43, + 35121 - 19968: jis0212<<14 | 0x3B<<7 | 0x44, + 35122 - 19968: jis0212<<14 | 0x3B<<7 | 0x45, + 35125 - 19968: jis0212<<14 | 0x3B<<7 | 0x46, + 35126 - 19968: jis0208<<14 | 0x49<<7 | 0x58, + 35128 - 19968: jis0208<<14 | 0x49<<7 | 0x59, + 35129 - 19968: jis0212<<14 | 0x3B<<7 | 0x47, + 35130 - 19968: jis0212<<14 | 0x3B<<7 | 0x48, + 35131 - 19968: jis0208<<14 | 0x49<<7 | 0x57, + 35134 - 19968: jis0212<<14 | 0x3B<<7 | 0x49, + 35136 - 19968: jis0212<<14 | 0x3B<<7 | 0x4A, + 35137 - 19968: jis0208<<14 | 0x49<<7 | 0x55, + 35138 - 19968: jis0212<<14 | 0x3B<<7 | 0x4B, + 35139 - 19968: jis0208<<14 | 0x49<<7 | 0x50, + 35140 - 19968: jis0208<<14 | 0x49<<7 | 0x56, + 35141 - 19968: jis0212<<14 | 0x3B<<7 | 0x4C, + 35142 - 19968: jis0212<<14 | 0x3B<<7 | 0x4D, + 35145 - 19968: jis0212<<14 | 0x3B<<7 | 0x4E, + 35148 - 19968: jis0208<<14 | 0x49<<7 | 0x5A, + 35149 - 19968: jis0208<<14 | 0x4F<<7 | 0x16, + 35151 - 19968: jis0212<<14 | 0x3B<<7 | 0x4F, + 35154 - 19968: jis0212<<14 | 0x3B<<7 | 0x50, + 35158 - 19968: jis0208<<14 | 0x11<<7 | 0x07, + 35159 - 19968: jis0212<<14 | 0x3B<<7 | 0x51, + 35162 - 19968: jis0212<<14 | 0x3B<<7 | 0x52, + 35163 - 19968: jis0212<<14 | 0x3B<<7 | 0x53, + 35164 - 19968: jis0212<<14 | 0x3B<<7 | 0x54, + 35166 - 19968: jis0208<<14 | 0x49<<7 | 0x5D, + 35167 - 19968: jis0208<<14 | 0x15<<7 | 0x3E, + 35168 - 19968: jis0208<<14 | 0x49<<7 | 0x5C, + 35169 - 19968: jis0212<<14 | 0x3B<<7 | 0x55, + 35170 - 19968: jis0212<<14 | 0x3B<<7 | 0x56, + 35171 - 19968: jis0212<<14 | 0x3B<<7 | 0x57, + 35172 - 19968: jis0208<<14 | 0x4A<<7 | 0x01, + 35174 - 19968: jis0208<<14 | 0x4A<<7 | 0x00, + 35178 - 19968: jis0208<<14 | 0x4A<<7 | 0x03, + 35179 - 19968: jis0212<<14 | 0x3B<<7 | 0x58, + 35181 - 19968: jis0208<<14 | 0x4A<<7 | 0x02, + 35182 - 19968: jis0212<<14 | 0x3B<<7 | 0x59, + 35183 - 19968: jis0208<<14 | 0x4A<<7 | 0x04, + 35184 - 19968: jis0212<<14 | 0x3B<<7 | 0x5A, + 35186 - 19968: jis0208<<14 | 0x1C<<7 | 0x10, + 35187 - 19968: jis0212<<14 | 0x3B<<7 | 0x5B, + 35188 - 19968: jis0208<<14 | 0x4A<<7 | 0x05, + 35189 - 19968: jis0212<<14 | 0x3B<<7 | 0x5C, + 35191 - 19968: jis0208<<14 | 0x4A<<7 | 0x06, + 35194 - 19968: jis0212<<14 | 0x3B<<7 | 0x5D, + 35195 - 19968: jis0212<<14 | 0x3C<<7 | 0x00, + 35196 - 19968: jis0212<<14 | 0x3C<<7 | 0x01, + 35197 - 19968: jis0212<<14 | 0x3C<<7 | 0x02, + 35198 - 19968: jis0208<<14 | 0x4A<<7 | 0x07, + 35199 - 19968: jis0208<<14 | 0x1F<<7 | 0x1D, + 35201 - 19968: jis0208<<14 | 0x2C<<7 | 0x36, + 35203 - 19968: jis0208<<14 | 0x4A<<7 | 0x08, + 35206 - 19968: jis0208<<14 | 0x29<<7 | 0x03, + 35207 - 19968: jis0208<<14 | 0x26<<7 | 0x25, + 35208 - 19968: jis0208<<14 | 0x4A<<7 | 0x09, + 35209 - 19968: jis0212<<14 | 0x3C<<7 | 0x03, + 35210 - 19968: jis0208<<14 | 0x4A<<7 | 0x0A, + 35211 - 19968: jis0208<<14 | 0x17<<7 | 0x0A, + 35213 - 19968: jis0212<<14 | 0x3C<<7 | 0x04, + 35215 - 19968: jis0208<<14 | 0x14<<7 | 0x0B, + 35216 - 19968: jis0212<<14 | 0x3C<<7 | 0x05, + 35219 - 19968: jis0208<<14 | 0x4A<<7 | 0x0B, + 35220 - 19968: jis0212<<14 | 0x3C<<7 | 0x06, + 35221 - 19968: jis0212<<14 | 0x3C<<7 | 0x07, + 35222 - 19968: jis0208<<14 | 0x1A<<7 | 0x4A, + 35223 - 19968: jis0208<<14 | 0x26<<7 | 0x20, + 35224 - 19968: jis0208<<14 | 0x4A<<7 | 0x0C, + 35226 - 19968: jis0208<<14 | 0x12<<7 | 0x2F, + 35227 - 19968: jis0212<<14 | 0x3C<<7 | 0x08, + 35228 - 19968: jis0212<<14 | 0x3C<<7 | 0x09, + 35231 - 19968: jis0212<<14 | 0x3C<<7 | 0x0A, + 35232 - 19968: jis0212<<14 | 0x3C<<7 | 0x0B, + 35233 - 19968: jis0208<<14 | 0x4A<<7 | 0x0D, + 35237 - 19968: jis0212<<14 | 0x3C<<7 | 0x0C, + 35238 - 19968: jis0208<<14 | 0x4A<<7 | 0x0F, + 35239 - 19968: jis0208<<14 | 0x2C<<7 | 0x56, + 35241 - 19968: jis0208<<14 | 0x4A<<7 | 0x0E, + 35242 - 19968: jis0208<<14 | 0x1E<<7 | 0x25, + 35244 - 19968: jis0208<<14 | 0x4A<<7 | 0x10, + 35247 - 19968: jis0208<<14 | 0x4A<<7 | 0x11, + 35248 - 19968: jis0212<<14 | 0x3C<<7 | 0x0D, + 35250 - 19968: jis0208<<14 | 0x4A<<7 | 0x12, + 35251 - 19968: jis0208<<14 | 0x13<<7 | 0x30, + 35252 - 19968: jis0212<<14 | 0x3C<<7 | 0x0E, + 35253 - 19968: jis0212<<14 | 0x3C<<7 | 0x0F, + 35254 - 19968: jis0212<<14 | 0x3C<<7 | 0x10, + 35255 - 19968: jis0212<<14 | 0x3C<<7 | 0x11, + 35258 - 19968: jis0208<<14 | 0x4A<<7 | 0x13, + 35260 - 19968: jis0212<<14 | 0x3C<<7 | 0x12, + 35261 - 19968: jis0208<<14 | 0x4A<<7 | 0x14, + 35263 - 19968: jis0208<<14 | 0x4A<<7 | 0x15, + 35264 - 19968: jis0208<<14 | 0x4A<<7 | 0x16, + 35282 - 19968: jis0208<<14 | 0x12<<7 | 0x30, + 35284 - 19968: jis0212<<14 | 0x3C<<7 | 0x13, + 35285 - 19968: jis0212<<14 | 0x3C<<7 | 0x14, + 35286 - 19968: jis0212<<14 | 0x3C<<7 | 0x15, + 35287 - 19968: jis0212<<14 | 0x3C<<7 | 0x16, + 35288 - 19968: jis0212<<14 | 0x3C<<7 | 0x17, + 35290 - 19968: jis0208<<14 | 0x4A<<7 | 0x17, + 35292 - 19968: jis0208<<14 | 0x4A<<7 | 0x18, + 35293 - 19968: jis0208<<14 | 0x4A<<7 | 0x19, + 35299 - 19968: jis0208<<14 | 0x11<<7 | 0x51, + 35301 - 19968: jis0212<<14 | 0x3C<<7 | 0x18, + 35302 - 19968: jis0208<<14 | 0x1E<<7 | 0x07, + 35303 - 19968: jis0208<<14 | 0x4A<<7 | 0x1A, + 35305 - 19968: jis0212<<14 | 0x3C<<7 | 0x19, + 35307 - 19968: jis0212<<14 | 0x3C<<7 | 0x1A, + 35309 - 19968: jis0212<<14 | 0x3C<<7 | 0x1B, + 35313 - 19968: jis0212<<14 | 0x3C<<7 | 0x1C, + 35315 - 19968: jis0212<<14 | 0x3C<<7 | 0x1D, + 35316 - 19968: jis0208<<14 | 0x4A<<7 | 0x1B, + 35318 - 19968: jis0212<<14 | 0x3C<<7 | 0x1E, + 35320 - 19968: jis0208<<14 | 0x4A<<7 | 0x1C, + 35321 - 19968: jis0212<<14 | 0x3C<<7 | 0x1F, + 35325 - 19968: jis0212<<14 | 0x3C<<7 | 0x20, + 35327 - 19968: jis0212<<14 | 0x3C<<7 | 0x21, + 35328 - 19968: jis0208<<14 | 0x17<<7 | 0x1F, + 35330 - 19968: jis0208<<14 | 0x23<<7 | 0x5A, + 35331 - 19968: jis0208<<14 | 0x4A<<7 | 0x1D, + 35332 - 19968: jis0212<<14 | 0x3C<<7 | 0x22, + 35333 - 19968: jis0212<<14 | 0x3C<<7 | 0x23, + 35335 - 19968: jis0212<<14 | 0x3C<<7 | 0x24, + 35336 - 19968: jis0208<<14 | 0x16<<7 | 0x36, + 35338 - 19968: jis0208<<14 | 0x1E<<7 | 0x35, + 35340 - 19968: jis0208<<14 | 0x4A<<7 | 0x20, + 35342 - 19968: jis0208<<14 | 0x25<<7 | 0x03, + 35343 - 19968: jis0212<<14 | 0x3C<<7 | 0x25, + 35344 - 19968: jis0208<<14 | 0x4A<<7 | 0x1F, + 35345 - 19968: jis0212<<14 | 0x3C<<7 | 0x26, + 35346 - 19968: jis0208<<14 | 0x5A<<7 | 0x46, + 35347 - 19968: jis0208<<14 | 0x16<<7 | 0x10, + 35348 - 19968: jis0212<<14 | 0x3C<<7 | 0x28, + 35349 - 19968: jis0212<<14 | 0x3C<<7 | 0x29, + 35350 - 19968: jis0208<<14 | 0x4A<<7 | 0x1E, + 35351 - 19968: jis0208<<14 | 0x21<<7 | 0x56, + 35352 - 19968: jis0208<<14 | 0x14<<7 | 0x0C, + 35355 - 19968: jis0208<<14 | 0x4A<<7 | 0x21, + 35357 - 19968: jis0208<<14 | 0x4A<<7 | 0x22, + 35358 - 19968: jis0212<<14 | 0x3C<<7 | 0x2A, + 35359 - 19968: jis0208<<14 | 0x1D<<7 | 0x38, + 35360 - 19968: jis0212<<14 | 0x3C<<7 | 0x2B, + 35362 - 19968: jis0212<<14 | 0x3C<<7 | 0x2C, + 35363 - 19968: jis0208<<14 | 0x16<<7 | 0x4C, + 35364 - 19968: jis0212<<14 | 0x3C<<7 | 0x2D, + 35365 - 19968: jis0208<<14 | 0x4A<<7 | 0x23, + 35366 - 19968: jis0212<<14 | 0x3C<<7 | 0x2E, + 35370 - 19968: jis0208<<14 | 0x2A<<7 | 0x0B, + 35371 - 19968: jis0212<<14 | 0x3C<<7 | 0x2F, + 35372 - 19968: jis0212<<14 | 0x3C<<7 | 0x30, + 35373 - 19968: jis0208<<14 | 0x1F<<7 | 0x3E, + 35375 - 19968: jis0212<<14 | 0x3C<<7 | 0x31, + 35377 - 19968: jis0208<<14 | 0x14<<7 | 0x55, + 35379 - 19968: jis0208<<14 | 0x2B<<7 | 0x54, + 35380 - 19968: jis0208<<14 | 0x20<<7 | 0x29, + 35381 - 19968: jis0212<<14 | 0x3C<<7 | 0x32, + 35382 - 19968: jis0208<<14 | 0x4A<<7 | 0x24, + 35383 - 19968: jis0208<<14 | 0x5A<<7 | 0x47, + 35386 - 19968: jis0208<<14 | 0x1E<<7 | 0x26, + 35387 - 19968: jis0208<<14 | 0x22<<7 | 0x4F, + 35388 - 19968: jis0208<<14 | 0x1D<<7 | 0x39, + 35389 - 19968: jis0212<<14 | 0x3C<<7 | 0x34, + 35390 - 19968: jis0212<<14 | 0x3C<<7 | 0x35, + 35392 - 19968: jis0212<<14 | 0x3C<<7 | 0x36, + 35393 - 19968: jis0208<<14 | 0x4A<<7 | 0x25, + 35395 - 19968: jis0212<<14 | 0x3C<<7 | 0x37, + 35397 - 19968: jis0212<<14 | 0x3C<<7 | 0x38, + 35398 - 19968: jis0208<<14 | 0x4A<<7 | 0x28, + 35399 - 19968: jis0212<<14 | 0x3C<<7 | 0x39, + 35400 - 19968: jis0208<<14 | 0x4A<<7 | 0x29, + 35401 - 19968: jis0212<<14 | 0x3C<<7 | 0x3A, + 35405 - 19968: jis0212<<14 | 0x3C<<7 | 0x3B, + 35406 - 19968: jis0212<<14 | 0x3C<<7 | 0x3C, + 35408 - 19968: jis0208<<14 | 0x19<<7 | 0x1D, + 35409 - 19968: jis0208<<14 | 0x21<<7 | 0x21, + 35410 - 19968: jis0208<<14 | 0x4A<<7 | 0x27, + 35411 - 19968: jis0212<<14 | 0x3C<<7 | 0x3D, + 35412 - 19968: jis0208<<14 | 0x1D<<7 | 0x3A, + 35413 - 19968: jis0208<<14 | 0x28<<7 | 0x1D, + 35414 - 19968: jis0212<<14 | 0x3C<<7 | 0x3E, + 35415 - 19968: jis0212<<14 | 0x3C<<7 | 0x3F, + 35416 - 19968: jis0212<<14 | 0x3C<<7 | 0x40, + 35419 - 19968: jis0208<<14 | 0x4A<<7 | 0x26, + 35420 - 19968: jis0212<<14 | 0x3C<<7 | 0x41, + 35421 - 19968: jis0212<<14 | 0x3C<<7 | 0x42, + 35422 - 19968: jis0208<<14 | 0x1A<<7 | 0x4B, + 35424 - 19968: jis0208<<14 | 0x10<<7 | 0x32, + 35425 - 19968: jis0212<<14 | 0x3C<<7 | 0x43, + 35426 - 19968: jis0208<<14 | 0x4A<<7 | 0x2D, + 35427 - 19968: jis0208<<14 | 0x16<<7 | 0x37, + 35429 - 19968: jis0212<<14 | 0x3C<<7 | 0x44, + 35430 - 19968: jis0208<<14 | 0x1A<<7 | 0x4D, + 35431 - 19968: jis0212<<14 | 0x3C<<7 | 0x45, + 35433 - 19968: jis0208<<14 | 0x1A<<7 | 0x4C, + 35435 - 19968: jis0208<<14 | 0x2E<<7 | 0x2C, + 35436 - 19968: jis0208<<14 | 0x4A<<7 | 0x2C, + 35437 - 19968: jis0208<<14 | 0x4A<<7 | 0x2B, + 35438 - 19968: jis0208<<14 | 0x20<<7 | 0x06, + 35440 - 19968: jis0208<<14 | 0x14<<7 | 0x2C, + 35441 - 19968: jis0208<<14 | 0x2E<<7 | 0x22, + 35442 - 19968: jis0208<<14 | 0x12<<7 | 0x19, + 35443 - 19968: jis0208<<14 | 0x1D<<7 | 0x3B, + 35445 - 19968: jis0212<<14 | 0x3C<<7 | 0x46, + 35446 - 19968: jis0212<<14 | 0x3C<<7 | 0x47, + 35447 - 19968: jis0212<<14 | 0x3C<<7 | 0x48, + 35449 - 19968: jis0208<<14 | 0x5A<<7 | 0x48, + 35450 - 19968: jis0212<<14 | 0x3C<<7 | 0x4A, + 35451 - 19968: jis0212<<14 | 0x3C<<7 | 0x4B, + 35452 - 19968: jis0208<<14 | 0x4A<<7 | 0x2A, + 35454 - 19968: jis0212<<14 | 0x3C<<7 | 0x4C, + 35455 - 19968: jis0212<<14 | 0x3C<<7 | 0x4D, + 35456 - 19968: jis0212<<14 | 0x3C<<7 | 0x4E, + 35458 - 19968: jis0208<<14 | 0x4A<<7 | 0x2F, + 35459 - 19968: jis0212<<14 | 0x3C<<7 | 0x4F, + 35460 - 19968: jis0208<<14 | 0x4A<<7 | 0x30, + 35461 - 19968: jis0208<<14 | 0x4A<<7 | 0x2E, + 35462 - 19968: jis0212<<14 | 0x3C<<7 | 0x50, + 35463 - 19968: jis0208<<14 | 0x17<<7 | 0x37, + 35465 - 19968: jis0208<<14 | 0x2C<<7 | 0x1F, + 35467 - 19968: jis0212<<14 | 0x3C<<7 | 0x51, + 35468 - 19968: jis0208<<14 | 0x1A<<7 | 0x4E, + 35469 - 19968: jis0208<<14 | 0x26<<7 | 0x06, + 35471 - 19968: jis0212<<14 | 0x3C<<7 | 0x52, + 35472 - 19968: jis0212<<14 | 0x3C<<7 | 0x53, + 35473 - 19968: jis0208<<14 | 0x4A<<7 | 0x33, + 35474 - 19968: jis0212<<14 | 0x3C<<7 | 0x54, + 35475 - 19968: jis0208<<14 | 0x1F<<7 | 0x1F, + 35477 - 19968: jis0208<<14 | 0x22<<7 | 0x21, + 35478 - 19968: jis0212<<14 | 0x3C<<7 | 0x55, + 35479 - 19968: jis0212<<14 | 0x3C<<7 | 0x56, + 35480 - 19968: jis0208<<14 | 0x2C<<7 | 0x15, + 35481 - 19968: jis0212<<14 | 0x3C<<7 | 0x57, + 35482 - 19968: jis0208<<14 | 0x4A<<7 | 0x36, + 35486 - 19968: jis0208<<14 | 0x17<<7 | 0x4B, + 35487 - 19968: jis0212<<14 | 0x3C<<7 | 0x58, + 35488 - 19968: jis0208<<14 | 0x1F<<7 | 0x1E, + 35489 - 19968: jis0208<<14 | 0x4A<<7 | 0x32, + 35491 - 19968: jis0208<<14 | 0x4A<<7 | 0x37, + 35492 - 19968: jis0208<<14 | 0x17<<7 | 0x4C, + 35493 - 19968: jis0208<<14 | 0x4A<<7 | 0x34, + 35494 - 19968: jis0208<<14 | 0x4A<<7 | 0x35, + 35495 - 19968: jis0208<<14 | 0x5A<<7 | 0x49, + 35496 - 19968: jis0208<<14 | 0x4A<<7 | 0x31, + 35497 - 19968: jis0212<<14 | 0x3C<<7 | 0x5A, + 35500 - 19968: jis0208<<14 | 0x1F<<7 | 0x41, + 35501 - 19968: jis0208<<14 | 0x25<<7 | 0x28, + 35502 - 19968: jis0212<<14 | 0x3C<<7 | 0x5B, + 35503 - 19968: jis0212<<14 | 0x3C<<7 | 0x5C, + 35504 - 19968: jis0208<<14 | 0x22<<7 | 0x0E, + 35506 - 19968: jis0208<<14 | 0x11<<7 | 0x3C, + 35507 - 19968: jis0212<<14 | 0x3C<<7 | 0x5D, + 35510 - 19968: jis0212<<14 | 0x3D<<7 | 0x00, + 35511 - 19968: jis0212<<14 | 0x3D<<7 | 0x01, + 35513 - 19968: jis0208<<14 | 0x27<<7 | 0x4F, + 35515 - 19968: jis0212<<14 | 0x3D<<7 | 0x02, + 35516 - 19968: jis0208<<14 | 0x14<<7 | 0x22, + 35518 - 19968: jis0208<<14 | 0x5A<<7 | 0x4A, + 35519 - 19968: jis0208<<14 | 0x23<<7 | 0x13, + 35522 - 19968: jis0208<<14 | 0x4A<<7 | 0x3A, + 35523 - 19968: jis0212<<14 | 0x3D<<7 | 0x04, + 35524 - 19968: jis0208<<14 | 0x4A<<7 | 0x38, + 35526 - 19968: jis0212<<14 | 0x3D<<7 | 0x05, + 35527 - 19968: jis0208<<14 | 0x22<<7 | 0x2B, + 35528 - 19968: jis0212<<14 | 0x3D<<7 | 0x06, + 35529 - 19968: jis0212<<14 | 0x3D<<7 | 0x07, + 35530 - 19968: jis0212<<14 | 0x3D<<7 | 0x08, + 35531 - 19968: jis0208<<14 | 0x1F<<7 | 0x20, + 35532 - 19968: jis0208<<14 | 0x13<<7 | 0x31, + 35533 - 19968: jis0208<<14 | 0x4A<<7 | 0x39, + 35535 - 19968: jis0208<<14 | 0x1E<<7 | 0x3A, + 35537 - 19968: jis0212<<14 | 0x3D<<7 | 0x09, + 35538 - 19968: jis0208<<14 | 0x2D<<7 | 0x29, + 35539 - 19968: jis0212<<14 | 0x3D<<7 | 0x0A, + 35540 - 19968: jis0212<<14 | 0x3D<<7 | 0x0B, + 35541 - 19968: jis0212<<14 | 0x3D<<7 | 0x0C, + 35542 - 19968: jis0208<<14 | 0x2E<<7 | 0x1F, + 35543 - 19968: jis0212<<14 | 0x3D<<7 | 0x0D, + 35546 - 19968: jis0208<<14 | 0x4A<<7 | 0x3B, + 35547 - 19968: jis0208<<14 | 0x4A<<7 | 0x46, + 35548 - 19968: jis0208<<14 | 0x23<<7 | 0x14, + 35549 - 19968: jis0212<<14 | 0x3D<<7 | 0x0E, + 35550 - 19968: jis0208<<14 | 0x4A<<7 | 0x45, + 35551 - 19968: jis0208<<14 | 0x5A<<7 | 0x4B, + 35552 - 19968: jis0208<<14 | 0x4A<<7 | 0x42, + 35553 - 19968: jis0208<<14 | 0x4A<<7 | 0x4A, + 35554 - 19968: jis0208<<14 | 0x4A<<7 | 0x43, + 35556 - 19968: jis0208<<14 | 0x4A<<7 | 0x3F, + 35558 - 19968: jis0208<<14 | 0x23<<7 | 0x5B, + 35559 - 19968: jis0208<<14 | 0x4A<<7 | 0x3E, + 35563 - 19968: jis0208<<14 | 0x4A<<7 | 0x3C, + 35564 - 19968: jis0212<<14 | 0x3D<<7 | 0x10, + 35565 - 19968: jis0208<<14 | 0x2C<<7 | 0x00, + 35566 - 19968: jis0208<<14 | 0x1A<<7 | 0x4F, + 35568 - 19968: jis0212<<14 | 0x3D<<7 | 0x11, + 35569 - 19968: jis0208<<14 | 0x4A<<7 | 0x40, + 35571 - 19968: jis0208<<14 | 0x4A<<7 | 0x3D, + 35572 - 19968: jis0212<<14 | 0x3D<<7 | 0x12, + 35573 - 19968: jis0212<<14 | 0x3D<<7 | 0x13, + 35574 - 19968: jis0208<<14 | 0x5A<<7 | 0x4D, + 35575 - 19968: jis0208<<14 | 0x4A<<7 | 0x44, + 35576 - 19968: jis0208<<14 | 0x1C<<7 | 0x53, + 35578 - 19968: jis0208<<14 | 0x17<<7 | 0x20, + 35580 - 19968: jis0212<<14 | 0x3D<<7 | 0x15, + 35582 - 19968: jis0208<<14 | 0x21<<7 | 0x59, + 35583 - 19968: jis0212<<14 | 0x3D<<7 | 0x16, + 35584 - 19968: jis0208<<14 | 0x2A<<7 | 0x24, + 35585 - 19968: jis0208<<14 | 0x10<<7 | 0x39, + 35586 - 19968: jis0208<<14 | 0x0F<<7 | 0x41, + 35588 - 19968: jis0208<<14 | 0x25<<7 | 0x04, + 35589 - 19968: jis0212<<14 | 0x3D<<7 | 0x17, + 35590 - 19968: jis0212<<14 | 0x3D<<7 | 0x18, + 35591 - 19968: jis0208<<14 | 0x4A<<7 | 0x48, + 35594 - 19968: jis0212<<14 | 0x3D<<7 | 0x1E, + 35595 - 19968: jis0212<<14 | 0x3D<<7 | 0x19, + 35596 - 19968: jis0208<<14 | 0x4A<<7 | 0x47, + 35598 - 19968: jis0208<<14 | 0x25<<7 | 0x45, + 35600 - 19968: jis0208<<14 | 0x4A<<7 | 0x4C, + 35601 - 19968: jis0212<<14 | 0x3D<<7 | 0x1A, + 35604 - 19968: jis0208<<14 | 0x4A<<7 | 0x41, + 35606 - 19968: jis0208<<14 | 0x4A<<7 | 0x4B, + 35607 - 19968: jis0208<<14 | 0x4A<<7 | 0x4D, + 35609 - 19968: jis0208<<14 | 0x17<<7 | 0x0B, + 35610 - 19968: jis0208<<14 | 0x4A<<7 | 0x49, + 35611 - 19968: jis0208<<14 | 0x18<<7 | 0x35, + 35612 - 19968: jis0212<<14 | 0x3D<<7 | 0x1B, + 35613 - 19968: jis0208<<14 | 0x1B<<7 | 0x34, + 35614 - 19968: jis0212<<14 | 0x3D<<7 | 0x1C, + 35615 - 19968: jis0212<<14 | 0x3D<<7 | 0x1D, + 35616 - 19968: jis0208<<14 | 0x4A<<7 | 0x4E, + 35617 - 19968: jis0208<<14 | 0x2C<<7 | 0x37, + 35622 - 19968: jis0208<<14 | 0x4A<<7 | 0x51, + 35624 - 19968: jis0208<<14 | 0x4A<<7 | 0x54, + 35627 - 19968: jis0208<<14 | 0x4A<<7 | 0x52, + 35628 - 19968: jis0208<<14 | 0x28<<7 | 0x14, + 35629 - 19968: jis0212<<14 | 0x3D<<7 | 0x1F, + 35632 - 19968: jis0212<<14 | 0x3D<<7 | 0x20, + 35635 - 19968: jis0208<<14 | 0x4A<<7 | 0x4F, + 35639 - 19968: jis0212<<14 | 0x3D<<7 | 0x21, + 35641 - 19968: jis0208<<14 | 0x15<<7 | 0x3F, + 35644 - 19968: jis0212<<14 | 0x3D<<7 | 0x22, + 35646 - 19968: jis0208<<14 | 0x4A<<7 | 0x53, + 35649 - 19968: jis0208<<14 | 0x4A<<7 | 0x55, + 35650 - 19968: jis0212<<14 | 0x3D<<7 | 0x23, + 35651 - 19968: jis0212<<14 | 0x3D<<7 | 0x24, + 35652 - 19968: jis0212<<14 | 0x3D<<7 | 0x25, + 35653 - 19968: jis0212<<14 | 0x3D<<7 | 0x26, + 35654 - 19968: jis0212<<14 | 0x3D<<7 | 0x27, + 35656 - 19968: jis0212<<14 | 0x3D<<7 | 0x28, + 35657 - 19968: jis0208<<14 | 0x4A<<7 | 0x59, + 35660 - 19968: jis0208<<14 | 0x4A<<7 | 0x56, + 35661 - 19968: jis0212<<14 | 0x3D<<7 | 0x2D, + 35662 - 19968: jis0208<<14 | 0x4A<<7 | 0x58, + 35663 - 19968: jis0208<<14 | 0x4A<<7 | 0x57, + 35666 - 19968: jis0212<<14 | 0x3D<<7 | 0x29, + 35667 - 19968: jis0208<<14 | 0x5A<<7 | 0x4E, + 35668 - 19968: jis0212<<14 | 0x3D<<7 | 0x2B, + 35670 - 19968: jis0208<<14 | 0x4A<<7 | 0x5A, + 35672 - 19968: jis0208<<14 | 0x1B<<7 | 0x10, + 35673 - 19968: jis0212<<14 | 0x3D<<7 | 0x2C, + 35674 - 19968: jis0208<<14 | 0x4A<<7 | 0x5C, + 35675 - 19968: jis0208<<14 | 0x4A<<7 | 0x5B, + 35676 - 19968: jis0208<<14 | 0x28<<7 | 0x47, + 35678 - 19968: jis0212<<14 | 0x3D<<7 | 0x2E, + 35679 - 19968: jis0208<<14 | 0x4B<<7 | 0x00, + 35683 - 19968: jis0212<<14 | 0x3D<<7 | 0x2F, + 35686 - 19968: jis0208<<14 | 0x16<<7 | 0x38, + 35691 - 19968: jis0208<<14 | 0x4A<<7 | 0x5D, + 35692 - 19968: jis0208<<14 | 0x4B<<7 | 0x01, + 35693 - 19968: jis0212<<14 | 0x3D<<7 | 0x30, + 35695 - 19968: jis0208<<14 | 0x4B<<7 | 0x02, + 35696 - 19968: jis0208<<14 | 0x14<<7 | 0x23, + 35697 - 19968: jis0208<<14 | 0x45<<7 | 0x20, + 35698 - 19968: jis0208<<14 | 0x1D<<7 | 0x58, + 35700 - 19968: jis0208<<14 | 0x4B<<7 | 0x03, + 35702 - 19968: jis0212<<14 | 0x3D<<7 | 0x31, + 35703 - 19968: jis0208<<14 | 0x17<<7 | 0x4D, + 35704 - 19968: jis0212<<14 | 0x3D<<7 | 0x32, + 35705 - 19968: jis0212<<14 | 0x3D<<7 | 0x33, + 35708 - 19968: jis0212<<14 | 0x3D<<7 | 0x34, + 35709 - 19968: jis0208<<14 | 0x4B<<7 | 0x04, + 35710 - 19968: jis0212<<14 | 0x3D<<7 | 0x35, + 35711 - 19968: jis0208<<14 | 0x5A<<7 | 0x4F, + 35712 - 19968: jis0208<<14 | 0x4B<<7 | 0x05, + 35713 - 19968: jis0212<<14 | 0x3D<<7 | 0x36, + 35715 - 19968: jis0208<<14 | 0x1A<<7 | 0x1D, + 35716 - 19968: jis0212<<14 | 0x3D<<7 | 0x37, + 35717 - 19968: jis0212<<14 | 0x3D<<7 | 0x38, + 35722 - 19968: jis0208<<14 | 0x39<<7 | 0x2D, + 35723 - 19968: jis0212<<14 | 0x3D<<7 | 0x39, + 35724 - 19968: jis0208<<14 | 0x4B<<7 | 0x06, + 35725 - 19968: jis0212<<14 | 0x3D<<7 | 0x3A, + 35726 - 19968: jis0208<<14 | 0x4B<<7 | 0x07, + 35727 - 19968: jis0212<<14 | 0x3D<<7 | 0x3B, + 35728 - 19968: jis0208<<14 | 0x1C<<7 | 0x11, + 35730 - 19968: jis0208<<14 | 0x4B<<7 | 0x08, + 35731 - 19968: jis0208<<14 | 0x4B<<7 | 0x09, + 35732 - 19968: jis0212<<14 | 0x3D<<7 | 0x3C, + 35733 - 19968: jis0212<<14 | 0x3D<<7 | 0x3D, + 35734 - 19968: jis0208<<14 | 0x4B<<7 | 0x0A, + 35737 - 19968: jis0208<<14 | 0x4B<<7 | 0x0B, + 35738 - 19968: jis0208<<14 | 0x4B<<7 | 0x0C, + 35740 - 19968: jis0212<<14 | 0x3D<<7 | 0x3E, + 35742 - 19968: jis0212<<14 | 0x3D<<7 | 0x3F, + 35743 - 19968: jis0212<<14 | 0x3D<<7 | 0x40, + 35895 - 19968: jis0208<<14 | 0x22<<7 | 0x0A, + 35896 - 19968: jis0212<<14 | 0x3D<<7 | 0x41, + 35897 - 19968: jis0212<<14 | 0x3D<<7 | 0x42, + 35898 - 19968: jis0208<<14 | 0x4B<<7 | 0x0D, + 35901 - 19968: jis0212<<14 | 0x3D<<7 | 0x43, + 35902 - 19968: jis0212<<14 | 0x3D<<7 | 0x44, + 35903 - 19968: jis0208<<14 | 0x4B<<7 | 0x0F, + 35905 - 19968: jis0208<<14 | 0x4B<<7 | 0x0E, + 35909 - 19968: jis0212<<14 | 0x3D<<7 | 0x45, + 35910 - 19968: jis0208<<14 | 0x25<<7 | 0x05, + 35911 - 19968: jis0212<<14 | 0x3D<<7 | 0x46, + 35912 - 19968: jis0208<<14 | 0x4B<<7 | 0x10, + 35913 - 19968: jis0212<<14 | 0x3D<<7 | 0x47, + 35914 - 19968: jis0208<<14 | 0x2A<<7 | 0x0C, + 35915 - 19968: jis0212<<14 | 0x3D<<7 | 0x48, + 35916 - 19968: jis0208<<14 | 0x4B<<7 | 0x11, + 35918 - 19968: jis0208<<14 | 0x4B<<7 | 0x12, + 35919 - 19968: jis0212<<14 | 0x3D<<7 | 0x49, + 35920 - 19968: jis0208<<14 | 0x4B<<7 | 0x13, + 35921 - 19968: jis0212<<14 | 0x3D<<7 | 0x4A, + 35923 - 19968: jis0212<<14 | 0x3D<<7 | 0x4B, + 35924 - 19968: jis0212<<14 | 0x3D<<7 | 0x4C, + 35925 - 19968: jis0208<<14 | 0x4B<<7 | 0x14, + 35927 - 19968: jis0212<<14 | 0x3D<<7 | 0x4D, + 35928 - 19968: jis0212<<14 | 0x3D<<7 | 0x4E, + 35929 - 19968: jis0212<<14 | 0x3D<<7 | 0x51, + 35930 - 19968: jis0208<<14 | 0x25<<7 | 0x39, + 35931 - 19968: jis0212<<14 | 0x3D<<7 | 0x4F, + 35933 - 19968: jis0212<<14 | 0x3D<<7 | 0x50, + 35937 - 19968: jis0208<<14 | 0x1D<<7 | 0x3C, + 35938 - 19968: jis0208<<14 | 0x4B<<7 | 0x15, + 35939 - 19968: jis0212<<14 | 0x3D<<7 | 0x52, + 35940 - 19968: jis0212<<14 | 0x3D<<7 | 0x53, + 35942 - 19968: jis0212<<14 | 0x3D<<7 | 0x54, + 35944 - 19968: jis0212<<14 | 0x3D<<7 | 0x55, + 35945 - 19968: jis0212<<14 | 0x3D<<7 | 0x56, + 35946 - 19968: jis0208<<14 | 0x18<<7 | 0x4A, + 35947 - 19968: jis0208<<14 | 0x2F<<7 | 0x0D, + 35948 - 19968: jis0208<<14 | 0x4B<<7 | 0x16, + 35949 - 19968: jis0212<<14 | 0x3D<<7 | 0x57, + 35955 - 19968: jis0212<<14 | 0x3D<<7 | 0x58, + 35957 - 19968: jis0212<<14 | 0x3D<<7 | 0x59, + 35958 - 19968: jis0212<<14 | 0x3D<<7 | 0x5A, + 35960 - 19968: jis0208<<14 | 0x4B<<7 | 0x17, + 35961 - 19968: jis0208<<14 | 0x28<<7 | 0x1E, + 35962 - 19968: jis0208<<14 | 0x4B<<7 | 0x18, + 35963 - 19968: jis0212<<14 | 0x3D<<7 | 0x5B, + 35964 - 19968: jis0208<<14 | 0x4B<<7 | 0x20, + 35966 - 19968: jis0212<<14 | 0x3D<<7 | 0x5C, + 35970 - 19968: jis0208<<14 | 0x4B<<7 | 0x19, + 35973 - 19968: jis0208<<14 | 0x4B<<7 | 0x1B, + 35974 - 19968: jis0212<<14 | 0x3D<<7 | 0x5D, + 35975 - 19968: jis0212<<14 | 0x3E<<7 | 0x00, + 35977 - 19968: jis0208<<14 | 0x4B<<7 | 0x1A, + 35978 - 19968: jis0208<<14 | 0x4B<<7 | 0x1C, + 35979 - 19968: jis0212<<14 | 0x3E<<7 | 0x01, + 35980 - 19968: jis0208<<14 | 0x2A<<7 | 0x25, + 35981 - 19968: jis0208<<14 | 0x4B<<7 | 0x1D, + 35982 - 19968: jis0208<<14 | 0x4B<<7 | 0x1E, + 35984 - 19968: jis0212<<14 | 0x3E<<7 | 0x02, + 35986 - 19968: jis0212<<14 | 0x3E<<7 | 0x03, + 35987 - 19968: jis0212<<14 | 0x3E<<7 | 0x04, + 35988 - 19968: jis0208<<14 | 0x4B<<7 | 0x1F, + 35992 - 19968: jis0208<<14 | 0x4B<<7 | 0x21, + 35993 - 19968: jis0212<<14 | 0x3E<<7 | 0x05, + 35995 - 19968: jis0212<<14 | 0x3E<<7 | 0x06, + 35996 - 19968: jis0212<<14 | 0x3E<<7 | 0x07, + 35997 - 19968: jis0208<<14 | 0x12<<7 | 0x0C, + 35998 - 19968: jis0208<<14 | 0x23<<7 | 0x46, + 36000 - 19968: jis0208<<14 | 0x28<<7 | 0x48, + 36001 - 19968: jis0208<<14 | 0x19<<7 | 0x41, + 36002 - 19968: jis0208<<14 | 0x18<<7 | 0x36, + 36004 - 19968: jis0212<<14 | 0x3E<<7 | 0x08, + 36007 - 19968: jis0208<<14 | 0x28<<7 | 0x2E, + 36008 - 19968: jis0208<<14 | 0x11<<7 | 0x3E, + 36009 - 19968: jis0208<<14 | 0x27<<7 | 0x2D, + 36010 - 19968: jis0208<<14 | 0x4B<<7 | 0x24, + 36011 - 19968: jis0208<<14 | 0x13<<7 | 0x32, + 36012 - 19968: jis0208<<14 | 0x1F<<7 | 0x34, + 36013 - 19968: jis0208<<14 | 0x4B<<7 | 0x23, + 36014 - 19968: jis0208<<14 | 0x4B<<7 | 0x28, + 36015 - 19968: jis0208<<14 | 0x22<<7 | 0x58, + 36016 - 19968: jis0208<<14 | 0x2B<<7 | 0x42, + 36018 - 19968: jis0208<<14 | 0x4B<<7 | 0x26, + 36019 - 19968: jis0208<<14 | 0x4B<<7 | 0x27, + 36020 - 19968: jis0208<<14 | 0x14<<7 | 0x0D, + 36022 - 19968: jis0208<<14 | 0x4B<<7 | 0x29, + 36023 - 19968: jis0208<<14 | 0x26<<7 | 0x42, + 36024 - 19968: jis0208<<14 | 0x21<<7 | 0x3E, + 36025 - 19968: jis0212<<14 | 0x3E<<7 | 0x09, + 36026 - 19968: jis0212<<14 | 0x3E<<7 | 0x0A, + 36027 - 19968: jis0208<<14 | 0x27<<7 | 0x50, + 36028 - 19968: jis0208<<14 | 0x24<<7 | 0x1C, + 36029 - 19968: jis0208<<14 | 0x4B<<7 | 0x25, + 36031 - 19968: jis0208<<14 | 0x2A<<7 | 0x26, + 36032 - 19968: jis0208<<14 | 0x11<<7 | 0x4B, + 36033 - 19968: jis0208<<14 | 0x4B<<7 | 0x2B, + 36034 - 19968: jis0208<<14 | 0x2E<<7 | 0x07, + 36035 - 19968: jis0208<<14 | 0x23<<7 | 0x21, + 36036 - 19968: jis0208<<14 | 0x2E<<7 | 0x24, + 36037 - 19968: jis0212<<14 | 0x3E<<7 | 0x0B, + 36038 - 19968: jis0212<<14 | 0x3E<<7 | 0x0C, + 36039 - 19968: jis0208<<14 | 0x1A<<7 | 0x50, + 36040 - 19968: jis0208<<14 | 0x4B<<7 | 0x2A, + 36041 - 19968: jis0212<<14 | 0x3E<<7 | 0x0D, + 36042 - 19968: jis0208<<14 | 0x21<<7 | 0x10, + 36043 - 19968: jis0212<<14 | 0x3E<<7 | 0x0E, + 36045 - 19968: jis0208<<14 | 0x4B<<7 | 0x3B, + 36046 - 19968: jis0208<<14 | 0x20<<7 | 0x07, + 36047 - 19968: jis0212<<14 | 0x3E<<7 | 0x0F, + 36049 - 19968: jis0208<<14 | 0x25<<7 | 0x57, + 36051 - 19968: jis0208<<14 | 0x28<<7 | 0x2F, + 36053 - 19968: jis0212<<14 | 0x3E<<7 | 0x11, + 36054 - 19968: jis0212<<14 | 0x3E<<7 | 0x10, + 36057 - 19968: jis0212<<14 | 0x3E<<7 | 0x12, + 36058 - 19968: jis0208<<14 | 0x4B<<7 | 0x2E, + 36059 - 19968: jis0208<<14 | 0x1A<<7 | 0x1E, + 36060 - 19968: jis0208<<14 | 0x1A<<7 | 0x51, + 36061 - 19968: jis0212<<14 | 0x3E<<7 | 0x13, + 36062 - 19968: jis0208<<14 | 0x1D<<7 | 0x3D, + 36064 - 19968: jis0208<<14 | 0x26<<7 | 0x44, + 36065 - 19968: jis0212<<14 | 0x3E<<7 | 0x14, + 36066 - 19968: jis0208<<14 | 0x17<<7 | 0x0C, + 36067 - 19968: jis0208<<14 | 0x4B<<7 | 0x2D, + 36068 - 19968: jis0208<<14 | 0x4B<<7 | 0x2C, + 36070 - 19968: jis0208<<14 | 0x28<<7 | 0x49, + 36072 - 19968: jis0212<<14 | 0x3E<<7 | 0x15, + 36074 - 19968: jis0208<<14 | 0x1B<<7 | 0x20, + 36076 - 19968: jis0212<<14 | 0x3E<<7 | 0x16, + 36077 - 19968: jis0208<<14 | 0x24<<7 | 0x31, + 36079 - 19968: jis0212<<14 | 0x3E<<7 | 0x17, + 36080 - 19968: jis0208<<14 | 0x5A<<7 | 0x50, + 36082 - 19968: jis0212<<14 | 0x3E<<7 | 0x19, + 36084 - 19968: jis0208<<14 | 0x5A<<7 | 0x51, + 36085 - 19968: jis0212<<14 | 0x3E<<7 | 0x1A, + 36087 - 19968: jis0212<<14 | 0x3E<<7 | 0x1B, + 36088 - 19968: jis0212<<14 | 0x3E<<7 | 0x1C, + 36090 - 19968: jis0208<<14 | 0x4B<<7 | 0x30, + 36091 - 19968: jis0208<<14 | 0x4B<<7 | 0x31, + 36092 - 19968: jis0208<<14 | 0x18<<7 | 0x37, + 36093 - 19968: jis0208<<14 | 0x4B<<7 | 0x2F, + 36094 - 19968: jis0212<<14 | 0x3E<<7 | 0x1D, + 36095 - 19968: jis0212<<14 | 0x3E<<7 | 0x1E, + 36097 - 19968: jis0212<<14 | 0x3E<<7 | 0x1F, + 36099 - 19968: jis0212<<14 | 0x3E<<7 | 0x20, + 36100 - 19968: jis0208<<14 | 0x4B<<7 | 0x32, + 36101 - 19968: jis0208<<14 | 0x4B<<7 | 0x33, + 36103 - 19968: jis0208<<14 | 0x4B<<7 | 0x35, + 36104 - 19968: jis0208<<14 | 0x21<<7 | 0x02, + 36105 - 19968: jis0212<<14 | 0x3E<<7 | 0x21, + 36106 - 19968: jis0208<<14 | 0x4B<<7 | 0x34, + 36107 - 19968: jis0208<<14 | 0x13<<7 | 0x45, + 36109 - 19968: jis0208<<14 | 0x4B<<7 | 0x37, + 36111 - 19968: jis0208<<14 | 0x4B<<7 | 0x36, + 36112 - 19968: jis0208<<14 | 0x4B<<7 | 0x38, + 36114 - 19968: jis0208<<14 | 0x5A<<7 | 0x52, + 36115 - 19968: jis0208<<14 | 0x4B<<7 | 0x3A, + 36116 - 19968: jis0208<<14 | 0x4B<<7 | 0x3C, + 36118 - 19968: jis0208<<14 | 0x4B<<7 | 0x3D, + 36119 - 19968: jis0212<<14 | 0x3E<<7 | 0x23, + 36123 - 19968: jis0212<<14 | 0x3E<<7 | 0x24, + 36196 - 19968: jis0208<<14 | 0x1F<<7 | 0x35, + 36197 - 19968: jis0212<<14 | 0x3E<<7 | 0x25, + 36198 - 19968: jis0208<<14 | 0x1B<<7 | 0x2E, + 36199 - 19968: jis0208<<14 | 0x4B<<7 | 0x3E, + 36201 - 19968: jis0212<<14 | 0x3E<<7 | 0x26, + 36203 - 19968: jis0208<<14 | 0x12<<7 | 0x31, + 36204 - 19968: jis0212<<14 | 0x3E<<7 | 0x27, + 36205 - 19968: jis0208<<14 | 0x4B<<7 | 0x3F, + 36206 - 19968: jis0212<<14 | 0x3E<<7 | 0x28, + 36208 - 19968: jis0208<<14 | 0x20<<7 | 0x55, + 36209 - 19968: jis0208<<14 | 0x4B<<7 | 0x40, + 36211 - 19968: jis0208<<14 | 0x4B<<7 | 0x41, + 36212 - 19968: jis0208<<14 | 0x28<<7 | 0x4A, + 36214 - 19968: jis0208<<14 | 0x5A<<7 | 0x53, + 36215 - 19968: jis0208<<14 | 0x14<<7 | 0x0E, + 36223 - 19968: jis0212<<14 | 0x3E<<7 | 0x29, + 36225 - 19968: jis0208<<14 | 0x4B<<7 | 0x42, + 36226 - 19968: jis0212<<14 | 0x3E<<7 | 0x2A, + 36228 - 19968: jis0212<<14 | 0x3E<<7 | 0x2B, + 36229 - 19968: jis0208<<14 | 0x23<<7 | 0x15, + 36232 - 19968: jis0212<<14 | 0x3E<<7 | 0x2C, + 36234 - 19968: jis0208<<14 | 0x10<<7 | 0x3A, + 36237 - 19968: jis0212<<14 | 0x3E<<7 | 0x2D, + 36240 - 19968: jis0212<<14 | 0x3E<<7 | 0x2E, + 36241 - 19968: jis0212<<14 | 0x3E<<7 | 0x2F, + 36245 - 19968: jis0212<<14 | 0x3E<<7 | 0x30, + 36249 - 19968: jis0208<<14 | 0x4B<<7 | 0x43, + 36254 - 19968: jis0212<<14 | 0x3E<<7 | 0x31, + 36255 - 19968: jis0212<<14 | 0x3E<<7 | 0x32, + 36256 - 19968: jis0212<<14 | 0x3E<<7 | 0x33, + 36259 - 19968: jis0208<<14 | 0x1B<<7 | 0x50, + 36262 - 19968: jis0212<<14 | 0x3E<<7 | 0x34, + 36264 - 19968: jis0208<<14 | 0x1E<<7 | 0x55, + 36267 - 19968: jis0212<<14 | 0x3E<<7 | 0x35, + 36268 - 19968: jis0212<<14 | 0x3E<<7 | 0x36, + 36271 - 19968: jis0212<<14 | 0x3E<<7 | 0x37, + 36274 - 19968: jis0212<<14 | 0x3E<<7 | 0x38, + 36275 - 19968: jis0208<<14 | 0x21<<7 | 0x0C, + 36277 - 19968: jis0212<<14 | 0x3E<<7 | 0x39, + 36279 - 19968: jis0212<<14 | 0x3E<<7 | 0x3A, + 36281 - 19968: jis0212<<14 | 0x3E<<7 | 0x3B, + 36282 - 19968: jis0208<<14 | 0x4B<<7 | 0x46, + 36283 - 19968: jis0212<<14 | 0x3E<<7 | 0x3C, + 36284 - 19968: jis0212<<14 | 0x3E<<7 | 0x4E, + 36286 - 19968: jis0208<<14 | 0x4B<<7 | 0x45, + 36288 - 19968: jis0212<<14 | 0x3E<<7 | 0x3D, + 36290 - 19968: jis0208<<14 | 0x4B<<7 | 0x44, + 36293 - 19968: jis0212<<14 | 0x3E<<7 | 0x3E, + 36294 - 19968: jis0212<<14 | 0x3E<<7 | 0x3F, + 36295 - 19968: jis0212<<14 | 0x3E<<7 | 0x40, + 36296 - 19968: jis0212<<14 | 0x3E<<7 | 0x41, + 36298 - 19968: jis0212<<14 | 0x3E<<7 | 0x42, + 36299 - 19968: jis0208<<14 | 0x4B<<7 | 0x4C, + 36300 - 19968: jis0208<<14 | 0x4B<<7 | 0x4A, + 36302 - 19968: jis0212<<14 | 0x3E<<7 | 0x43, + 36303 - 19968: jis0208<<14 | 0x4B<<7 | 0x47, + 36305 - 19968: jis0212<<14 | 0x3E<<7 | 0x44, + 36308 - 19968: jis0212<<14 | 0x3E<<7 | 0x45, + 36309 - 19968: jis0212<<14 | 0x3E<<7 | 0x46, + 36310 - 19968: jis0208<<14 | 0x4B<<7 | 0x49, + 36311 - 19968: jis0212<<14 | 0x3E<<7 | 0x47, + 36313 - 19968: jis0212<<14 | 0x3E<<7 | 0x48, + 36314 - 19968: jis0208<<14 | 0x4B<<7 | 0x48, + 36315 - 19968: jis0208<<14 | 0x4B<<7 | 0x4B, + 36317 - 19968: jis0208<<14 | 0x14<<7 | 0x56, + 36319 - 19968: jis0208<<14 | 0x4B<<7 | 0x4F, + 36321 - 19968: jis0208<<14 | 0x1F<<7 | 0x36, + 36323 - 19968: jis0208<<14 | 0x4B<<7 | 0x50, + 36324 - 19968: jis0212<<14 | 0x3E<<7 | 0x49, + 36325 - 19968: jis0212<<14 | 0x3E<<7 | 0x4A, + 36327 - 19968: jis0212<<14 | 0x3E<<7 | 0x4B, + 36328 - 19968: jis0208<<14 | 0x17<<7 | 0x38, + 36330 - 19968: jis0208<<14 | 0x4B<<7 | 0x4D, + 36331 - 19968: jis0208<<14 | 0x4B<<7 | 0x4E, + 36332 - 19968: jis0212<<14 | 0x3E<<7 | 0x4C, + 36335 - 19968: jis0208<<14 | 0x2E<<7 | 0x08, + 36336 - 19968: jis0212<<14 | 0x3E<<7 | 0x4D, + 36337 - 19968: jis0212<<14 | 0x3E<<7 | 0x4F, + 36338 - 19968: jis0212<<14 | 0x3E<<7 | 0x50, + 36339 - 19968: jis0208<<14 | 0x23<<7 | 0x16, + 36340 - 19968: jis0212<<14 | 0x3E<<7 | 0x51, + 36341 - 19968: jis0208<<14 | 0x20<<7 | 0x08, + 36348 - 19968: jis0208<<14 | 0x4B<<7 | 0x51, + 36349 - 19968: jis0212<<14 | 0x3E<<7 | 0x52, + 36351 - 19968: jis0208<<14 | 0x4B<<7 | 0x54, + 36353 - 19968: jis0212<<14 | 0x3E<<7 | 0x53, + 36356 - 19968: jis0212<<14 | 0x3E<<7 | 0x54, + 36357 - 19968: jis0212<<14 | 0x3E<<7 | 0x55, + 36358 - 19968: jis0212<<14 | 0x3E<<7 | 0x56, + 36360 - 19968: jis0208<<14 | 0x4B<<7 | 0x52, + 36361 - 19968: jis0208<<14 | 0x4B<<7 | 0x53, + 36362 - 19968: jis0208<<14 | 0x2C<<7 | 0x38, + 36363 - 19968: jis0212<<14 | 0x3E<<7 | 0x57, + 36367 - 19968: jis0208<<14 | 0x25<<7 | 0x06, + 36368 - 19968: jis0208<<14 | 0x4B<<7 | 0x57, + 36369 - 19968: jis0212<<14 | 0x3E<<7 | 0x58, + 36372 - 19968: jis0212<<14 | 0x3E<<7 | 0x59, + 36374 - 19968: jis0212<<14 | 0x3E<<7 | 0x5A, + 36381 - 19968: jis0208<<14 | 0x4B<<7 | 0x55, + 36382 - 19968: jis0208<<14 | 0x4B<<7 | 0x56, + 36383 - 19968: jis0208<<14 | 0x4B<<7 | 0x58, + 36384 - 19968: jis0212<<14 | 0x3E<<7 | 0x5B, + 36385 - 19968: jis0212<<14 | 0x3E<<7 | 0x5C, + 36386 - 19968: jis0212<<14 | 0x3E<<7 | 0x5D, + 36387 - 19968: jis0212<<14 | 0x3F<<7 | 0x00, + 36390 - 19968: jis0212<<14 | 0x3F<<7 | 0x01, + 36391 - 19968: jis0212<<14 | 0x3F<<7 | 0x02, + 36394 - 19968: jis0208<<14 | 0x4C<<7 | 0x08, + 36400 - 19968: jis0208<<14 | 0x4B<<7 | 0x5B, + 36401 - 19968: jis0212<<14 | 0x3F<<7 | 0x03, + 36403 - 19968: jis0212<<14 | 0x3F<<7 | 0x04, + 36404 - 19968: jis0208<<14 | 0x4B<<7 | 0x5C, + 36405 - 19968: jis0208<<14 | 0x4B<<7 | 0x5A, + 36406 - 19968: jis0212<<14 | 0x3F<<7 | 0x05, + 36407 - 19968: jis0212<<14 | 0x3F<<7 | 0x06, + 36408 - 19968: jis0212<<14 | 0x3F<<7 | 0x07, + 36409 - 19968: jis0212<<14 | 0x3F<<7 | 0x08, + 36413 - 19968: jis0212<<14 | 0x3F<<7 | 0x09, + 36416 - 19968: jis0212<<14 | 0x3F<<7 | 0x0A, + 36417 - 19968: jis0212<<14 | 0x3F<<7 | 0x0B, + 36418 - 19968: jis0208<<14 | 0x4B<<7 | 0x59, + 36420 - 19968: jis0208<<14 | 0x23<<7 | 0x5C, + 36423 - 19968: jis0208<<14 | 0x4C<<7 | 0x00, + 36424 - 19968: jis0208<<14 | 0x4C<<7 | 0x04, + 36425 - 19968: jis0208<<14 | 0x4C<<7 | 0x01, + 36426 - 19968: jis0208<<14 | 0x4B<<7 | 0x5D, + 36427 - 19968: jis0212<<14 | 0x3F<<7 | 0x0C, + 36428 - 19968: jis0208<<14 | 0x4C<<7 | 0x02, + 36429 - 19968: jis0212<<14 | 0x3F<<7 | 0x0D, + 36430 - 19968: jis0212<<14 | 0x3F<<7 | 0x0E, + 36431 - 19968: jis0212<<14 | 0x3F<<7 | 0x0F, + 36432 - 19968: jis0208<<14 | 0x4C<<7 | 0x03, + 36436 - 19968: jis0212<<14 | 0x3F<<7 | 0x10, + 36437 - 19968: jis0208<<14 | 0x4C<<7 | 0x0A, + 36441 - 19968: jis0208<<14 | 0x4C<<7 | 0x05, + 36443 - 19968: jis0212<<14 | 0x3F<<7 | 0x11, + 36444 - 19968: jis0212<<14 | 0x3F<<7 | 0x12, + 36445 - 19968: jis0212<<14 | 0x3F<<7 | 0x13, + 36446 - 19968: jis0212<<14 | 0x3F<<7 | 0x14, + 36447 - 19968: jis0208<<14 | 0x1F<<7 | 0x37, + 36448 - 19968: jis0208<<14 | 0x4C<<7 | 0x07, + 36449 - 19968: jis0212<<14 | 0x3F<<7 | 0x15, + 36450 - 19968: jis0212<<14 | 0x3F<<7 | 0x16, + 36451 - 19968: jis0208<<14 | 0x4C<<7 | 0x09, + 36452 - 19968: jis0208<<14 | 0x4C<<7 | 0x06, + 36457 - 19968: jis0212<<14 | 0x3F<<7 | 0x17, + 36460 - 19968: jis0212<<14 | 0x3F<<7 | 0x18, + 36461 - 19968: jis0212<<14 | 0x3F<<7 | 0x19, + 36463 - 19968: jis0212<<14 | 0x3F<<7 | 0x1A, + 36464 - 19968: jis0212<<14 | 0x3F<<7 | 0x1B, + 36465 - 19968: jis0212<<14 | 0x3F<<7 | 0x1C, + 36466 - 19968: jis0208<<14 | 0x4C<<7 | 0x0C, + 36468 - 19968: jis0208<<14 | 0x1C<<7 | 0x12, + 36470 - 19968: jis0208<<14 | 0x4C<<7 | 0x0B, + 36473 - 19968: jis0212<<14 | 0x3F<<7 | 0x1D, + 36474 - 19968: jis0212<<14 | 0x3F<<7 | 0x1E, + 36475 - 19968: jis0212<<14 | 0x3F<<7 | 0x1F, + 36476 - 19968: jis0208<<14 | 0x4C<<7 | 0x0D, + 36481 - 19968: jis0208<<14 | 0x4C<<7 | 0x0E, + 36482 - 19968: jis0212<<14 | 0x3F<<7 | 0x20, + 36483 - 19968: jis0212<<14 | 0x3F<<7 | 0x21, + 36484 - 19968: jis0208<<14 | 0x4C<<7 | 0x11, + 36485 - 19968: jis0208<<14 | 0x4C<<7 | 0x10, + 36487 - 19968: jis0208<<14 | 0x4C<<7 | 0x0F, + 36489 - 19968: jis0212<<14 | 0x3F<<7 | 0x22, + 36490 - 19968: jis0208<<14 | 0x4C<<7 | 0x13, + 36491 - 19968: jis0208<<14 | 0x4C<<7 | 0x12, + 36493 - 19968: jis0208<<14 | 0x2B<<7 | 0x55, + 36496 - 19968: jis0212<<14 | 0x3F<<7 | 0x23, + 36497 - 19968: jis0208<<14 | 0x4C<<7 | 0x15, + 36498 - 19968: jis0212<<14 | 0x3F<<7 | 0x24, + 36499 - 19968: jis0208<<14 | 0x4C<<7 | 0x14, + 36500 - 19968: jis0208<<14 | 0x4C<<7 | 0x16, + 36501 - 19968: jis0212<<14 | 0x3F<<7 | 0x25, + 36505 - 19968: jis0208<<14 | 0x4C<<7 | 0x17, + 36506 - 19968: jis0212<<14 | 0x3F<<7 | 0x26, + 36507 - 19968: jis0212<<14 | 0x3F<<7 | 0x27, + 36509 - 19968: jis0212<<14 | 0x3F<<7 | 0x28, + 36510 - 19968: jis0212<<14 | 0x3F<<7 | 0x29, + 36513 - 19968: jis0208<<14 | 0x4C<<7 | 0x19, + 36514 - 19968: jis0212<<14 | 0x3F<<7 | 0x2A, + 36519 - 19968: jis0212<<14 | 0x3F<<7 | 0x2B, + 36521 - 19968: jis0212<<14 | 0x3F<<7 | 0x2C, + 36522 - 19968: jis0208<<14 | 0x4C<<7 | 0x18, + 36523 - 19968: jis0208<<14 | 0x1E<<7 | 0x27, + 36524 - 19968: jis0208<<14 | 0x4C<<7 | 0x1A, + 36525 - 19968: jis0212<<14 | 0x3F<<7 | 0x2D, + 36526 - 19968: jis0212<<14 | 0x3F<<7 | 0x2E, + 36527 - 19968: jis0208<<14 | 0x15<<7 | 0x4C, + 36528 - 19968: jis0208<<14 | 0x4C<<7 | 0x1B, + 36529 - 19968: jis0208<<14 | 0x4C<<7 | 0x1D, + 36531 - 19968: jis0212<<14 | 0x3F<<7 | 0x2F, + 36533 - 19968: jis0212<<14 | 0x3F<<7 | 0x30, + 36538 - 19968: jis0212<<14 | 0x3F<<7 | 0x31, + 36539 - 19968: jis0212<<14 | 0x3F<<7 | 0x32, + 36542 - 19968: jis0208<<14 | 0x4C<<7 | 0x1E, + 36544 - 19968: jis0212<<14 | 0x3F<<7 | 0x33, + 36545 - 19968: jis0212<<14 | 0x3F<<7 | 0x34, + 36547 - 19968: jis0212<<14 | 0x3F<<7 | 0x35, + 36548 - 19968: jis0212<<14 | 0x3F<<7 | 0x36, + 36549 - 19968: jis0208<<14 | 0x4C<<7 | 0x1F, + 36550 - 19968: jis0208<<14 | 0x4C<<7 | 0x1C, + 36551 - 19968: jis0212<<14 | 0x3F<<7 | 0x37, + 36552 - 19968: jis0208<<14 | 0x4C<<7 | 0x20, + 36554 - 19968: jis0208<<14 | 0x1B<<7 | 0x35, + 36555 - 19968: jis0208<<14 | 0x4C<<7 | 0x21, + 36556 - 19968: jis0208<<14 | 0x14<<7 | 0x0F, + 36557 - 19968: jis0208<<14 | 0x16<<7 | 0x12, + 36559 - 19968: jis0208<<14 | 0x5A<<7 | 0x55, + 36561 - 19968: jis0212<<14 | 0x3F<<7 | 0x39, + 36562 - 19968: jis0208<<14 | 0x17<<7 | 0x0D, + 36564 - 19968: jis0212<<14 | 0x3F<<7 | 0x3A, + 36571 - 19968: jis0208<<14 | 0x4C<<7 | 0x22, + 36572 - 19968: jis0212<<14 | 0x3F<<7 | 0x3B, + 36575 - 19968: jis0208<<14 | 0x25<<7 | 0x4F, + 36578 - 19968: jis0208<<14 | 0x24<<7 | 0x1D, + 36579 - 19968: jis0208<<14 | 0x4C<<7 | 0x23, + 36584 - 19968: jis0212<<14 | 0x3F<<7 | 0x3C, + 36587 - 19968: jis0208<<14 | 0x4C<<7 | 0x26, + 36589 - 19968: jis0212<<14 | 0x3F<<7 | 0x43, + 36590 - 19968: jis0212<<14 | 0x3F<<7 | 0x3D, + 36592 - 19968: jis0212<<14 | 0x3F<<7 | 0x3E, + 36593 - 19968: jis0212<<14 | 0x3F<<7 | 0x3F, + 36599 - 19968: jis0212<<14 | 0x3F<<7 | 0x40, + 36600 - 19968: jis0208<<14 | 0x1B<<7 | 0x13, + 36601 - 19968: jis0212<<14 | 0x3F<<7 | 0x41, + 36602 - 19968: jis0212<<14 | 0x3F<<7 | 0x42, + 36603 - 19968: jis0208<<14 | 0x4C<<7 | 0x25, + 36604 - 19968: jis0208<<14 | 0x4C<<7 | 0x24, + 36605 - 19968: jis0208<<14 | 0x16<<7 | 0x39, + 36606 - 19968: jis0208<<14 | 0x4C<<7 | 0x27, + 36608 - 19968: jis0212<<14 | 0x3F<<7 | 0x44, + 36610 - 19968: jis0212<<14 | 0x3F<<7 | 0x45, + 36611 - 19968: jis0208<<14 | 0x12<<7 | 0x32, + 36613 - 19968: jis0208<<14 | 0x4C<<7 | 0x29, + 36615 - 19968: jis0212<<14 | 0x3F<<7 | 0x46, + 36616 - 19968: jis0212<<14 | 0x3F<<7 | 0x47, + 36617 - 19968: jis0208<<14 | 0x19<<7 | 0x3B, + 36618 - 19968: jis0208<<14 | 0x4C<<7 | 0x28, + 36620 - 19968: jis0208<<14 | 0x4C<<7 | 0x31, + 36623 - 19968: jis0212<<14 | 0x3F<<7 | 0x48, + 36624 - 19968: jis0212<<14 | 0x3F<<7 | 0x49, + 36626 - 19968: jis0208<<14 | 0x4C<<7 | 0x2B, + 36627 - 19968: jis0208<<14 | 0x4C<<7 | 0x2D, + 36628 - 19968: jis0208<<14 | 0x29<<7 | 0x44, + 36629 - 19968: jis0208<<14 | 0x4C<<7 | 0x2A, + 36630 - 19968: jis0212<<14 | 0x3F<<7 | 0x4A, + 36631 - 19968: jis0212<<14 | 0x3F<<7 | 0x4B, + 36632 - 19968: jis0212<<14 | 0x3F<<7 | 0x4C, + 36633 - 19968: jis0208<<14 | 0x4C<<7 | 0x2C, + 36635 - 19968: jis0208<<14 | 0x4C<<7 | 0x30, + 36636 - 19968: jis0208<<14 | 0x4C<<7 | 0x2E, + 36637 - 19968: jis0208<<14 | 0x14<<7 | 0x10, + 36638 - 19968: jis0212<<14 | 0x3F<<7 | 0x4D, + 36639 - 19968: jis0208<<14 | 0x4C<<7 | 0x2F, + 36640 - 19968: jis0212<<14 | 0x3F<<7 | 0x4E, + 36641 - 19968: jis0212<<14 | 0x3F<<7 | 0x4F, + 36643 - 19968: jis0212<<14 | 0x3F<<7 | 0x50, + 36645 - 19968: jis0212<<14 | 0x3F<<7 | 0x51, + 36646 - 19968: jis0208<<14 | 0x4C<<7 | 0x32, + 36647 - 19968: jis0212<<14 | 0x3F<<7 | 0x52, + 36648 - 19968: jis0212<<14 | 0x3F<<7 | 0x53, + 36649 - 19968: jis0208<<14 | 0x26<<7 | 0x39, + 36650 - 19968: jis0208<<14 | 0x2D<<7 | 0x37, + 36652 - 19968: jis0212<<14 | 0x3F<<7 | 0x54, + 36653 - 19968: jis0212<<14 | 0x3F<<7 | 0x55, + 36654 - 19968: jis0212<<14 | 0x3F<<7 | 0x56, + 36655 - 19968: jis0208<<14 | 0x1C<<7 | 0x13, + 36659 - 19968: jis0208<<14 | 0x4C<<7 | 0x33, + 36660 - 19968: jis0212<<14 | 0x3F<<7 | 0x57, + 36661 - 19968: jis0212<<14 | 0x3F<<7 | 0x58, + 36662 - 19968: jis0212<<14 | 0x3F<<7 | 0x59, + 36663 - 19968: jis0212<<14 | 0x3F<<7 | 0x5A, + 36664 - 19968: jis0208<<14 | 0x2C<<7 | 0x01, + 36665 - 19968: jis0208<<14 | 0x4C<<7 | 0x35, + 36666 - 19968: jis0212<<14 | 0x3F<<7 | 0x5B, + 36667 - 19968: jis0208<<14 | 0x4C<<7 | 0x34, + 36670 - 19968: jis0208<<14 | 0x4C<<7 | 0x38, + 36671 - 19968: jis0208<<14 | 0x2C<<7 | 0x20, + 36672 - 19968: jis0212<<14 | 0x3F<<7 | 0x5C, + 36673 - 19968: jis0212<<14 | 0x3F<<7 | 0x5D, + 36674 - 19968: jis0208<<14 | 0x4C<<7 | 0x37, + 36675 - 19968: jis0212<<14 | 0x40<<7 | 0x00, + 36676 - 19968: jis0208<<14 | 0x12<<7 | 0x4C, + 36677 - 19968: jis0208<<14 | 0x4C<<7 | 0x36, + 36678 - 19968: jis0208<<14 | 0x4C<<7 | 0x3B, + 36679 - 19968: jis0212<<14 | 0x40<<7 | 0x01, + 36681 - 19968: jis0208<<14 | 0x4C<<7 | 0x3A, + 36684 - 19968: jis0208<<14 | 0x4C<<7 | 0x39, + 36685 - 19968: jis0208<<14 | 0x24<<7 | 0x11, + 36686 - 19968: jis0208<<14 | 0x4C<<7 | 0x3C, + 36687 - 19968: jis0212<<14 | 0x40<<7 | 0x02, + 36689 - 19968: jis0212<<14 | 0x40<<7 | 0x03, + 36690 - 19968: jis0212<<14 | 0x40<<7 | 0x04, + 36691 - 19968: jis0212<<14 | 0x40<<7 | 0x05, + 36692 - 19968: jis0212<<14 | 0x40<<7 | 0x06, + 36693 - 19968: jis0212<<14 | 0x40<<7 | 0x07, + 36695 - 19968: jis0208<<14 | 0x4C<<7 | 0x3D, + 36696 - 19968: jis0212<<14 | 0x40<<7 | 0x08, + 36700 - 19968: jis0208<<14 | 0x4C<<7 | 0x3E, + 36701 - 19968: jis0212<<14 | 0x40<<7 | 0x09, + 36702 - 19968: jis0212<<14 | 0x40<<7 | 0x0A, + 36703 - 19968: jis0208<<14 | 0x18<<7 | 0x4B, + 36705 - 19968: jis0208<<14 | 0x16<<7 | 0x04, + 36706 - 19968: jis0208<<14 | 0x4C<<7 | 0x3F, + 36707 - 19968: jis0208<<14 | 0x4C<<7 | 0x40, + 36708 - 19968: jis0208<<14 | 0x4C<<7 | 0x41, + 36709 - 19968: jis0212<<14 | 0x40<<7 | 0x0B, + 36763 - 19968: jis0208<<14 | 0x1E<<7 | 0x28, + 36764 - 19968: jis0208<<14 | 0x4C<<7 | 0x42, + 36765 - 19968: jis0212<<14 | 0x40<<7 | 0x0C, + 36766 - 19968: jis0208<<14 | 0x1B<<7 | 0x0C, + 36767 - 19968: jis0208<<14 | 0x4C<<7 | 0x43, + 36768 - 19968: jis0212<<14 | 0x40<<7 | 0x0D, + 36769 - 19968: jis0212<<14 | 0x40<<7 | 0x0E, + 36771 - 19968: jis0208<<14 | 0x4C<<7 | 0x44, + 36772 - 19968: jis0212<<14 | 0x40<<7 | 0x0F, + 36773 - 19968: jis0212<<14 | 0x40<<7 | 0x10, + 36774 - 19968: jis0212<<14 | 0x40<<7 | 0x11, + 36775 - 19968: jis0208<<14 | 0x31<<7 | 0x00, + 36776 - 19968: jis0208<<14 | 0x30<<7 | 0x5D, + 36781 - 19968: jis0208<<14 | 0x4C<<7 | 0x45, + 36782 - 19968: jis0208<<14 | 0x44<<7 | 0x4F, + 36783 - 19968: jis0208<<14 | 0x4C<<7 | 0x46, + 36784 - 19968: jis0208<<14 | 0x22<<7 | 0x03, + 36785 - 19968: jis0208<<14 | 0x1E<<7 | 0x0A, + 36786 - 19968: jis0208<<14 | 0x26<<7 | 0x1F, + 36789 - 19968: jis0212<<14 | 0x40<<7 | 0x12, + 36790 - 19968: jis0212<<14 | 0x40<<7 | 0x13, + 36791 - 19968: jis0208<<14 | 0x4C<<7 | 0x47, + 36792 - 19968: jis0212<<14 | 0x40<<7 | 0x14, + 36794 - 19968: jis0208<<14 | 0x29<<7 | 0x34, + 36795 - 19968: jis0208<<14 | 0x23<<7 | 0x33, + 36796 - 19968: jis0208<<14 | 0x18<<7 | 0x5D, + 36798 - 19968: jis0212<<14 | 0x40<<7 | 0x15, + 36799 - 19968: jis0208<<14 | 0x22<<7 | 0x08, + 36800 - 19968: jis0212<<14 | 0x40<<7 | 0x16, + 36801 - 19968: jis0212<<14 | 0x40<<7 | 0x17, + 36802 - 19968: jis0208<<14 | 0x10<<7 | 0x09, + 36804 - 19968: jis0208<<14 | 0x2A<<7 | 0x57, + 36805 - 19968: jis0208<<14 | 0x1E<<7 | 0x36, + 36806 - 19968: jis0212<<14 | 0x40<<7 | 0x18, + 36810 - 19968: jis0212<<14 | 0x40<<7 | 0x19, + 36811 - 19968: jis0212<<14 | 0x40<<7 | 0x1A, + 36813 - 19968: jis0212<<14 | 0x40<<7 | 0x1B, + 36814 - 19968: jis0208<<14 | 0x16<<7 | 0x3D, + 36816 - 19968: jis0212<<14 | 0x40<<7 | 0x1C, + 36817 - 19968: jis0208<<14 | 0x15<<7 | 0x40, + 36818 - 19968: jis0212<<14 | 0x40<<7 | 0x1D, + 36819 - 19968: jis0212<<14 | 0x40<<7 | 0x1E, + 36820 - 19968: jis0208<<14 | 0x29<<7 | 0x35, + 36821 - 19968: jis0212<<14 | 0x40<<7 | 0x1F, + 36826 - 19968: jis0208<<14 | 0x4C<<7 | 0x48, + 36832 - 19968: jis0212<<14 | 0x40<<7 | 0x20, + 36834 - 19968: jis0208<<14 | 0x4C<<7 | 0x4A, + 36835 - 19968: jis0212<<14 | 0x40<<7 | 0x21, + 36836 - 19968: jis0212<<14 | 0x40<<7 | 0x22, + 36837 - 19968: jis0208<<14 | 0x4C<<7 | 0x49, + 36838 - 19968: jis0208<<14 | 0x11<<7 | 0x3F, + 36840 - 19968: jis0212<<14 | 0x40<<7 | 0x23, + 36841 - 19968: jis0208<<14 | 0x25<<7 | 0x55, + 36842 - 19968: jis0208<<14 | 0x4C<<7 | 0x4B, + 36843 - 19968: jis0208<<14 | 0x26<<7 | 0x56, + 36845 - 19968: jis0208<<14 | 0x24<<7 | 0x12, + 36846 - 19968: jis0212<<14 | 0x40<<7 | 0x24, + 36847 - 19968: jis0208<<14 | 0x4C<<7 | 0x4C, + 36848 - 19968: jis0208<<14 | 0x1C<<7 | 0x31, + 36849 - 19968: jis0212<<14 | 0x40<<7 | 0x25, + 36852 - 19968: jis0208<<14 | 0x4C<<7 | 0x4E, + 36853 - 19968: jis0212<<14 | 0x40<<7 | 0x26, + 36854 - 19968: jis0212<<14 | 0x40<<7 | 0x27, + 36855 - 19968: jis0208<<14 | 0x2B<<7 | 0x21, + 36856 - 19968: jis0208<<14 | 0x4C<<7 | 0x5D, + 36857 - 19968: jis0208<<14 | 0x4C<<7 | 0x50, + 36858 - 19968: jis0208<<14 | 0x4C<<7 | 0x51, + 36859 - 19968: jis0212<<14 | 0x40<<7 | 0x28, + 36861 - 19968: jis0208<<14 | 0x23<<7 | 0x28, + 36862 - 19968: jis0212<<14 | 0x40<<7 | 0x29, + 36864 - 19968: jis0208<<14 | 0x21<<7 | 0x3F, + 36865 - 19968: jis0208<<14 | 0x20<<7 | 0x56, + 36866 - 19968: jis0212<<14 | 0x40<<7 | 0x2A, + 36867 - 19968: jis0208<<14 | 0x25<<7 | 0x07, + 36868 - 19968: jis0212<<14 | 0x40<<7 | 0x2B, + 36869 - 19968: jis0208<<14 | 0x4C<<7 | 0x4F, + 36870 - 19968: jis0208<<14 | 0x14<<7 | 0x34, + 36872 - 19968: jis0212<<14 | 0x40<<7 | 0x2C, + 36875 - 19968: jis0208<<14 | 0x4C<<7 | 0x58, + 36876 - 19968: jis0212<<14 | 0x40<<7 | 0x2D, + 36877 - 19968: jis0208<<14 | 0x4C<<7 | 0x55, + 36878 - 19968: jis0208<<14 | 0x4D<<7 | 0x04, + 36879 - 19968: jis0208<<14 | 0x25<<7 | 0x08, + 36880 - 19968: jis0208<<14 | 0x22<<7 | 0x3F, + 36881 - 19968: jis0208<<14 | 0x4C<<7 | 0x52, + 36883 - 19968: jis0208<<14 | 0x23<<7 | 0x5D, + 36884 - 19968: jis0208<<14 | 0x24<<7 | 0x32, + 36885 - 19968: jis0208<<14 | 0x4C<<7 | 0x53, + 36886 - 19968: jis0208<<14 | 0x4C<<7 | 0x57, + 36887 - 19968: jis0208<<14 | 0x1E<<7 | 0x3F, + 36888 - 19968: jis0212<<14 | 0x40<<7 | 0x2E, + 36889 - 19968: jis0208<<14 | 0x26<<7 | 0x46, + 36890 - 19968: jis0208<<14 | 0x23<<7 | 0x2B, + 36891 - 19968: jis0212<<14 | 0x40<<7 | 0x2F, + 36893 - 19968: jis0208<<14 | 0x1F<<7 | 0x21, + 36894 - 19968: jis0208<<14 | 0x4C<<7 | 0x56, + 36895 - 19968: jis0208<<14 | 0x21<<7 | 0x0D, + 36896 - 19968: jis0208<<14 | 0x21<<7 | 0x03, + 36897 - 19968: jis0208<<14 | 0x4C<<7 | 0x54, + 36898 - 19968: jis0208<<14 | 0x0F<<7 | 0x08, + 36899 - 19968: jis0208<<14 | 0x2E<<7 | 0x01, + 36903 - 19968: jis0208<<14 | 0x4C<<7 | 0x59, + 36904 - 19968: jis0212<<14 | 0x40<<7 | 0x30, + 36905 - 19968: jis0212<<14 | 0x40<<7 | 0x31, + 36906 - 19968: jis0212<<14 | 0x40<<7 | 0x33, + 36908 - 19968: jis0212<<14 | 0x40<<7 | 0x34, + 36909 - 19968: jis0212<<14 | 0x40<<7 | 0x35, + 36910 - 19968: jis0208<<14 | 0x21<<7 | 0x40, + 36911 - 19968: jis0212<<14 | 0x40<<7 | 0x32, + 36913 - 19968: jis0208<<14 | 0x1C<<7 | 0x14, + 36914 - 19968: jis0208<<14 | 0x1E<<7 | 0x29, + 36915 - 19968: jis0212<<14 | 0x40<<7 | 0x36, + 36916 - 19968: jis0212<<14 | 0x40<<7 | 0x37, + 36917 - 19968: jis0208<<14 | 0x4C<<7 | 0x5B, + 36918 - 19968: jis0208<<14 | 0x4C<<7 | 0x5A, + 36919 - 19968: jis0212<<14 | 0x40<<7 | 0x38, + 36920 - 19968: jis0208<<14 | 0x0F<<7 | 0x4E, + 36921 - 19968: jis0208<<14 | 0x4C<<7 | 0x5C, + 36924 - 19968: jis0208<<14 | 0x28<<7 | 0x0E, + 36926 - 19968: jis0208<<14 | 0x4D<<7 | 0x06, + 36927 - 19968: jis0212<<14 | 0x40<<7 | 0x39, + 36929 - 19968: jis0208<<14 | 0x25<<7 | 0x3A, + 36930 - 19968: jis0208<<14 | 0x1E<<7 | 0x4A, + 36931 - 19968: jis0212<<14 | 0x40<<7 | 0x3A, + 36932 - 19968: jis0212<<14 | 0x40<<7 | 0x3B, + 36933 - 19968: jis0208<<14 | 0x22<<7 | 0x38, + 36935 - 19968: jis0208<<14 | 0x15<<7 | 0x57, + 36937 - 19968: jis0208<<14 | 0x4D<<7 | 0x05, + 36938 - 19968: jis0208<<14 | 0x2C<<7 | 0x16, + 36939 - 19968: jis0208<<14 | 0x10<<7 | 0x1E, + 36940 - 19968: jis0212<<14 | 0x40<<7 | 0x3C, + 36941 - 19968: jis0208<<14 | 0x29<<7 | 0x36, + 36942 - 19968: jis0208<<14 | 0x11<<7 | 0x40, + 36943 - 19968: jis0208<<14 | 0x4D<<7 | 0x00, + 36944 - 19968: jis0208<<14 | 0x4D<<7 | 0x01, + 36945 - 19968: jis0208<<14 | 0x4D<<7 | 0x02, + 36946 - 19968: jis0208<<14 | 0x4D<<7 | 0x03, + 36947 - 19968: jis0208<<14 | 0x25<<7 | 0x1A, + 36948 - 19968: jis0208<<14 | 0x22<<7 | 0x02, + 36949 - 19968: jis0208<<14 | 0x0F<<7 | 0x42, + 36950 - 19968: jis0208<<14 | 0x4D<<7 | 0x07, + 36952 - 19968: jis0208<<14 | 0x4D<<7 | 0x08, + 36953 - 19968: jis0208<<14 | 0x53<<7 | 0x02, + 36955 - 19968: jis0212<<14 | 0x40<<7 | 0x3D, + 36956 - 19968: jis0208<<14 | 0x21<<7 | 0x1C, + 36957 - 19968: jis0212<<14 | 0x40<<7 | 0x3E, + 36958 - 19968: jis0208<<14 | 0x4D<<7 | 0x09, + 36960 - 19968: jis0208<<14 | 0x10<<7 | 0x52, + 36961 - 19968: jis0208<<14 | 0x20<<7 | 0x2B, + 36962 - 19968: jis0212<<14 | 0x40<<7 | 0x3F, + 36963 - 19968: jis0208<<14 | 0x17<<7 | 0x0E, + 36965 - 19968: jis0208<<14 | 0x2C<<7 | 0x39, + 36966 - 19968: jis0212<<14 | 0x40<<7 | 0x40, + 36967 - 19968: jis0208<<14 | 0x5A<<7 | 0x58, + 36968 - 19968: jis0208<<14 | 0x4D<<7 | 0x0A, + 36969 - 19968: jis0208<<14 | 0x24<<7 | 0x0B, + 36972 - 19968: jis0212<<14 | 0x40<<7 | 0x42, + 36973 - 19968: jis0208<<14 | 0x20<<7 | 0x57, + 36974 - 19968: jis0208<<14 | 0x1B<<7 | 0x36, + 36975 - 19968: jis0208<<14 | 0x4D<<7 | 0x0B, + 36976 - 19968: jis0212<<14 | 0x40<<7 | 0x43, + 36978 - 19968: jis0208<<14 | 0x4D<<7 | 0x0E, + 36980 - 19968: jis0212<<14 | 0x40<<7 | 0x44, + 36981 - 19968: jis0208<<14 | 0x1C<<7 | 0x44, + 36982 - 19968: jis0208<<14 | 0x4D<<7 | 0x0C, + 36983 - 19968: jis0208<<14 | 0x20<<7 | 0x0A, + 36984 - 19968: jis0208<<14 | 0x20<<7 | 0x09, + 36985 - 19968: jis0212<<14 | 0x40<<7 | 0x45, + 36986 - 19968: jis0208<<14 | 0x0F<<7 | 0x43, + 36988 - 19968: jis0208<<14 | 0x2D<<7 | 0x2A, + 36989 - 19968: jis0208<<14 | 0x4D<<7 | 0x10, + 36991 - 19968: jis0208<<14 | 0x27<<7 | 0x51, + 36992 - 19968: jis0208<<14 | 0x4D<<7 | 0x12, + 36993 - 19968: jis0208<<14 | 0x4D<<7 | 0x11, + 36994 - 19968: jis0208<<14 | 0x4D<<7 | 0x0F, + 36995 - 19968: jis0208<<14 | 0x42<<7 | 0x43, + 36996 - 19968: jis0208<<14 | 0x13<<7 | 0x33, + 36997 - 19968: jis0212<<14 | 0x40<<7 | 0x46, + 36999 - 19968: jis0208<<14 | 0x4C<<7 | 0x4D, + 37000 - 19968: jis0212<<14 | 0x40<<7 | 0x47, + 37001 - 19968: jis0208<<14 | 0x4D<<7 | 0x14, + 37002 - 19968: jis0208<<14 | 0x4D<<7 | 0x13, + 37003 - 19968: jis0212<<14 | 0x40<<7 | 0x48, + 37004 - 19968: jis0212<<14 | 0x40<<7 | 0x49, + 37006 - 19968: jis0212<<14 | 0x40<<7 | 0x4A, + 37007 - 19968: jis0208<<14 | 0x4D<<7 | 0x15, + 37008 - 19968: jis0212<<14 | 0x40<<7 | 0x4B, + 37009 - 19968: jis0208<<14 | 0x2C<<7 | 0x17, + 37013 - 19968: jis0212<<14 | 0x40<<7 | 0x4C, + 37015 - 19968: jis0212<<14 | 0x40<<7 | 0x4D, + 37016 - 19968: jis0212<<14 | 0x40<<7 | 0x4E, + 37017 - 19968: jis0212<<14 | 0x40<<7 | 0x4F, + 37019 - 19968: jis0212<<14 | 0x40<<7 | 0x50, + 37024 - 19968: jis0212<<14 | 0x40<<7 | 0x51, + 37025 - 19968: jis0212<<14 | 0x40<<7 | 0x52, + 37026 - 19968: jis0212<<14 | 0x40<<7 | 0x53, + 37027 - 19968: jis0208<<14 | 0x25<<7 | 0x40, + 37029 - 19968: jis0212<<14 | 0x40<<7 | 0x54, + 37030 - 19968: jis0208<<14 | 0x2A<<7 | 0x0D, + 37032 - 19968: jis0208<<14 | 0x4D<<7 | 0x16, + 37034 - 19968: jis0208<<14 | 0x1B<<7 | 0x38, + 37039 - 19968: jis0208<<14 | 0x4D<<7 | 0x17, + 37040 - 19968: jis0212<<14 | 0x40<<7 | 0x55, + 37041 - 19968: jis0208<<14 | 0x4D<<7 | 0x18, + 37042 - 19968: jis0212<<14 | 0x40<<7 | 0x56, + 37043 - 19968: jis0212<<14 | 0x40<<7 | 0x57, + 37044 - 19968: jis0212<<14 | 0x40<<7 | 0x58, + 37045 - 19968: jis0208<<14 | 0x4D<<7 | 0x19, + 37046 - 19968: jis0212<<14 | 0x40<<7 | 0x59, + 37048 - 19968: jis0208<<14 | 0x24<<7 | 0x00, + 37053 - 19968: jis0212<<14 | 0x40<<7 | 0x5A, + 37054 - 19968: jis0212<<14 | 0x40<<7 | 0x5C, + 37057 - 19968: jis0208<<14 | 0x0F<<7 | 0x49, + 37059 - 19968: jis0212<<14 | 0x40<<7 | 0x5D, + 37060 - 19968: jis0212<<14 | 0x41<<7 | 0x00, + 37061 - 19968: jis0212<<14 | 0x41<<7 | 0x01, + 37063 - 19968: jis0212<<14 | 0x41<<7 | 0x02, + 37064 - 19968: jis0212<<14 | 0x41<<7 | 0x03, + 37066 - 19968: jis0208<<14 | 0x18<<7 | 0x38, + 37068 - 19968: jis0212<<14 | 0x40<<7 | 0x5B, + 37070 - 19968: jis0208<<14 | 0x2E<<7 | 0x19, + 37074 - 19968: jis0212<<14 | 0x41<<7 | 0x0C, + 37077 - 19968: jis0212<<14 | 0x41<<7 | 0x04, + 37079 - 19968: jis0212<<14 | 0x41<<7 | 0x05, + 37080 - 19968: jis0212<<14 | 0x41<<7 | 0x06, + 37081 - 19968: jis0212<<14 | 0x41<<7 | 0x07, + 37083 - 19968: jis0208<<14 | 0x4D<<7 | 0x1D, + 37084 - 19968: jis0212<<14 | 0x41<<7 | 0x08, + 37085 - 19968: jis0212<<14 | 0x41<<7 | 0x09, + 37086 - 19968: jis0208<<14 | 0x5A<<7 | 0x59, + 37087 - 19968: jis0212<<14 | 0x41<<7 | 0x0A, + 37089 - 19968: jis0208<<14 | 0x16<<7 | 0x13, + 37090 - 19968: jis0208<<14 | 0x4D<<7 | 0x1A, + 37092 - 19968: jis0208<<14 | 0x4D<<7 | 0x1B, + 37093 - 19968: jis0212<<14 | 0x41<<7 | 0x0B, + 37096 - 19968: jis0208<<14 | 0x28<<7 | 0x53, + 37099 - 19968: jis0212<<14 | 0x41<<7 | 0x0E, + 37101 - 19968: jis0208<<14 | 0x12<<7 | 0x33, + 37103 - 19968: jis0212<<14 | 0x41<<7 | 0x0F, + 37104 - 19968: jis0212<<14 | 0x41<<7 | 0x10, + 37108 - 19968: jis0212<<14 | 0x41<<7 | 0x11, + 37109 - 19968: jis0208<<14 | 0x2C<<7 | 0x18, + 37110 - 19968: jis0212<<14 | 0x41<<7 | 0x0D, + 37111 - 19968: jis0208<<14 | 0x15<<7 | 0x1E, + 37117 - 19968: jis0208<<14 | 0x24<<7 | 0x33, + 37118 - 19968: jis0212<<14 | 0x41<<7 | 0x12, + 37119 - 19968: jis0212<<14 | 0x41<<7 | 0x13, + 37120 - 19968: jis0212<<14 | 0x41<<7 | 0x14, + 37122 - 19968: jis0208<<14 | 0x4D<<7 | 0x1E, + 37124 - 19968: jis0212<<14 | 0x41<<7 | 0x15, + 37125 - 19968: jis0212<<14 | 0x41<<7 | 0x16, + 37126 - 19968: jis0212<<14 | 0x41<<7 | 0x17, + 37128 - 19968: jis0212<<14 | 0x41<<7 | 0x18, + 37133 - 19968: jis0212<<14 | 0x41<<7 | 0x19, + 37136 - 19968: jis0212<<14 | 0x41<<7 | 0x1A, + 37138 - 19968: jis0208<<14 | 0x4D<<7 | 0x1F, + 37140 - 19968: jis0212<<14 | 0x41<<7 | 0x1B, + 37141 - 19968: jis0208<<14 | 0x5A<<7 | 0x5B, + 37142 - 19968: jis0212<<14 | 0x41<<7 | 0x1C, + 37143 - 19968: jis0212<<14 | 0x41<<7 | 0x1D, + 37144 - 19968: jis0212<<14 | 0x41<<7 | 0x1E, + 37145 - 19968: jis0208<<14 | 0x4D<<7 | 0x20, + 37146 - 19968: jis0212<<14 | 0x41<<7 | 0x1F, + 37148 - 19968: jis0212<<14 | 0x41<<7 | 0x20, + 37150 - 19968: jis0212<<14 | 0x41<<7 | 0x21, + 37152 - 19968: jis0212<<14 | 0x41<<7 | 0x22, + 37154 - 19968: jis0212<<14 | 0x41<<7 | 0x24, + 37155 - 19968: jis0212<<14 | 0x41<<7 | 0x25, + 37157 - 19968: jis0212<<14 | 0x41<<7 | 0x23, + 37159 - 19968: jis0208<<14 | 0x5A<<7 | 0x5C, + 37161 - 19968: jis0212<<14 | 0x41<<7 | 0x27, + 37165 - 19968: jis0208<<14 | 0x24<<7 | 0x01, + 37166 - 19968: jis0212<<14 | 0x41<<7 | 0x28, + 37167 - 19968: jis0212<<14 | 0x41<<7 | 0x29, + 37168 - 19968: jis0208<<14 | 0x4D<<7 | 0x22, + 37169 - 19968: jis0212<<14 | 0x41<<7 | 0x2A, + 37170 - 19968: jis0208<<14 | 0x4D<<7 | 0x21, + 37172 - 19968: jis0212<<14 | 0x41<<7 | 0x2B, + 37174 - 19968: jis0212<<14 | 0x41<<7 | 0x2C, + 37175 - 19968: jis0212<<14 | 0x41<<7 | 0x2D, + 37177 - 19968: jis0212<<14 | 0x41<<7 | 0x2E, + 37178 - 19968: jis0212<<14 | 0x41<<7 | 0x2F, + 37180 - 19968: jis0212<<14 | 0x41<<7 | 0x30, + 37181 - 19968: jis0212<<14 | 0x41<<7 | 0x31, + 37187 - 19968: jis0212<<14 | 0x41<<7 | 0x32, + 37191 - 19968: jis0212<<14 | 0x41<<7 | 0x33, + 37192 - 19968: jis0212<<14 | 0x41<<7 | 0x34, + 37193 - 19968: jis0208<<14 | 0x25<<7 | 0x32, + 37194 - 19968: jis0208<<14 | 0x4D<<7 | 0x23, + 37195 - 19968: jis0208<<14 | 0x1C<<7 | 0x15, + 37196 - 19968: jis0208<<14 | 0x1B<<7 | 0x3F, + 37197 - 19968: jis0208<<14 | 0x26<<7 | 0x3A, + 37198 - 19968: jis0208<<14 | 0x22<<7 | 0x50, + 37199 - 19968: jis0212<<14 | 0x41<<7 | 0x35, + 37202 - 19968: jis0208<<14 | 0x1B<<7 | 0x51, + 37203 - 19968: jis0212<<14 | 0x41<<7 | 0x36, + 37204 - 19968: jis0208<<14 | 0x1E<<7 | 0x4B, + 37206 - 19968: jis0208<<14 | 0x4D<<7 | 0x24, + 37207 - 19968: jis0212<<14 | 0x41<<7 | 0x37, + 37208 - 19968: jis0208<<14 | 0x4D<<7 | 0x25, + 37209 - 19968: jis0212<<14 | 0x41<<7 | 0x38, + 37210 - 19968: jis0212<<14 | 0x41<<7 | 0x39, + 37211 - 19968: jis0212<<14 | 0x41<<7 | 0x3A, + 37217 - 19968: jis0212<<14 | 0x41<<7 | 0x3B, + 37218 - 19968: jis0208<<14 | 0x1E<<7 | 0x3C, + 37219 - 19968: jis0208<<14 | 0x4D<<7 | 0x26, + 37220 - 19968: jis0212<<14 | 0x41<<7 | 0x3C, + 37221 - 19968: jis0208<<14 | 0x4D<<7 | 0x27, + 37223 - 19968: jis0212<<14 | 0x41<<7 | 0x3D, + 37225 - 19968: jis0208<<14 | 0x4D<<7 | 0x28, + 37226 - 19968: jis0208<<14 | 0x2C<<7 | 0x4E, + 37228 - 19968: jis0208<<14 | 0x1C<<7 | 0x16, + 37229 - 19968: jis0212<<14 | 0x41<<7 | 0x3E, + 37234 - 19968: jis0208<<14 | 0x4D<<7 | 0x2A, + 37235 - 19968: jis0208<<14 | 0x4D<<7 | 0x29, + 37236 - 19968: jis0212<<14 | 0x41<<7 | 0x3F, + 37237 - 19968: jis0208<<14 | 0x18<<7 | 0x39, + 37239 - 19968: jis0208<<14 | 0x18<<7 | 0x52, + 37240 - 19968: jis0208<<14 | 0x1A<<7 | 0x1F, + 37241 - 19968: jis0212<<14 | 0x41<<7 | 0x40, + 37242 - 19968: jis0212<<14 | 0x41<<7 | 0x41, + 37243 - 19968: jis0212<<14 | 0x41<<7 | 0x42, + 37249 - 19968: jis0212<<14 | 0x41<<7 | 0x43, + 37250 - 19968: jis0208<<14 | 0x4D<<7 | 0x2D, + 37251 - 19968: jis0212<<14 | 0x41<<7 | 0x44, + 37253 - 19968: jis0212<<14 | 0x41<<7 | 0x45, + 37254 - 19968: jis0212<<14 | 0x41<<7 | 0x46, + 37255 - 19968: jis0208<<14 | 0x1C<<7 | 0x45, + 37257 - 19968: jis0208<<14 | 0x4D<<7 | 0x2C, + 37258 - 19968: jis0212<<14 | 0x41<<7 | 0x47, + 37259 - 19968: jis0208<<14 | 0x4D<<7 | 0x2B, + 37261 - 19968: jis0208<<14 | 0x21<<7 | 0x48, + 37262 - 19968: jis0212<<14 | 0x41<<7 | 0x48, + 37264 - 19968: jis0208<<14 | 0x17<<7 | 0x4E, + 37265 - 19968: jis0212<<14 | 0x41<<7 | 0x49, + 37266 - 19968: jis0208<<14 | 0x1F<<7 | 0x22, + 37267 - 19968: jis0212<<14 | 0x41<<7 | 0x4A, + 37268 - 19968: jis0212<<14 | 0x41<<7 | 0x4B, + 37269 - 19968: jis0212<<14 | 0x41<<7 | 0x4C, + 37271 - 19968: jis0208<<14 | 0x27<<7 | 0x0F, + 37272 - 19968: jis0212<<14 | 0x41<<7 | 0x4D, + 37276 - 19968: jis0208<<14 | 0x1C<<7 | 0x18, + 37278 - 19968: jis0212<<14 | 0x41<<7 | 0x4E, + 37281 - 19968: jis0212<<14 | 0x41<<7 | 0x4F, + 37282 - 19968: jis0208<<14 | 0x4D<<7 | 0x2E, + 37284 - 19968: jis0208<<14 | 0x1D<<7 | 0x3E, + 37286 - 19968: jis0212<<14 | 0x41<<7 | 0x50, + 37288 - 19968: jis0212<<14 | 0x41<<7 | 0x51, + 37290 - 19968: jis0208<<14 | 0x4D<<7 | 0x31, + 37291 - 19968: jis0208<<14 | 0x4D<<7 | 0x2F, + 37292 - 19968: jis0212<<14 | 0x41<<7 | 0x52, + 37293 - 19968: jis0212<<14 | 0x41<<7 | 0x53, + 37294 - 19968: jis0212<<14 | 0x41<<7 | 0x54, + 37295 - 19968: jis0208<<14 | 0x4D<<7 | 0x30, + 37296 - 19968: jis0212<<14 | 0x41<<7 | 0x55, + 37297 - 19968: jis0212<<14 | 0x41<<7 | 0x56, + 37298 - 19968: jis0212<<14 | 0x41<<7 | 0x57, + 37299 - 19968: jis0212<<14 | 0x41<<7 | 0x58, + 37300 - 19968: jis0208<<14 | 0x4D<<7 | 0x33, + 37301 - 19968: jis0208<<14 | 0x4D<<7 | 0x32, + 37302 - 19968: jis0212<<14 | 0x41<<7 | 0x59, + 37304 - 19968: jis0208<<14 | 0x1D<<7 | 0x59, + 37306 - 19968: jis0208<<14 | 0x4D<<7 | 0x34, + 37307 - 19968: jis0212<<14 | 0x41<<7 | 0x5A, + 37308 - 19968: jis0212<<14 | 0x41<<7 | 0x5B, + 37309 - 19968: jis0212<<14 | 0x41<<7 | 0x5C, + 37311 - 19968: jis0212<<14 | 0x41<<7 | 0x5D, + 37312 - 19968: jis0208<<14 | 0x4D<<7 | 0x35, + 37313 - 19968: jis0208<<14 | 0x4D<<7 | 0x36, + 37314 - 19968: jis0212<<14 | 0x42<<7 | 0x00, + 37315 - 19968: jis0212<<14 | 0x42<<7 | 0x01, + 37317 - 19968: jis0212<<14 | 0x42<<7 | 0x02, + 37318 - 19968: jis0208<<14 | 0x27<<7 | 0x2F, + 37319 - 19968: jis0208<<14 | 0x19<<7 | 0x32, + 37320 - 19968: jis0208<<14 | 0x1B<<7 | 0x40, + 37321 - 19968: jis0208<<14 | 0x4D<<7 | 0x37, + 37323 - 19968: jis0208<<14 | 0x4D<<7 | 0x38, + 37324 - 19968: jis0208<<14 | 0x2D<<7 | 0x03, + 37325 - 19968: jis0208<<14 | 0x1C<<7 | 0x24, + 37326 - 19968: jis0208<<14 | 0x2B<<7 | 0x4D, + 37327 - 19968: jis0208<<14 | 0x2D<<7 | 0x2B, + 37328 - 19968: jis0208<<14 | 0x4D<<7 | 0x39, + 37329 - 19968: jis0208<<14 | 0x15<<7 | 0x41, + 37331 - 19968: jis0212<<14 | 0x42<<7 | 0x03, + 37332 - 19968: jis0212<<14 | 0x42<<7 | 0x04, + 37334 - 19968: jis0208<<14 | 0x4D<<7 | 0x3A, + 37335 - 19968: jis0208<<14 | 0x5B<<7 | 0x00, + 37336 - 19968: jis0208<<14 | 0x24<<7 | 0x02, + 37337 - 19968: jis0212<<14 | 0x42<<7 | 0x06, + 37338 - 19968: jis0208<<14 | 0x5A<<7 | 0x5D, + 37339 - 19968: jis0208<<14 | 0x4D<<7 | 0x3D, + 37340 - 19968: jis0208<<14 | 0x12<<7 | 0x57, + 37341 - 19968: jis0208<<14 | 0x1E<<7 | 0x2A, + 37342 - 19968: jis0208<<14 | 0x5B<<7 | 0x01, + 37343 - 19968: jis0208<<14 | 0x4D<<7 | 0x3B, + 37345 - 19968: jis0208<<14 | 0x4D<<7 | 0x3C, + 37347 - 19968: jis0208<<14 | 0x23<<7 | 0x3F, + 37348 - 19968: jis0208<<14 | 0x5B<<7 | 0x04, + 37349 - 19968: jis0208<<14 | 0x5B<<7 | 0x05, + 37350 - 19968: jis0208<<14 | 0x2A<<7 | 0x34, + 37351 - 19968: jis0208<<14 | 0x15<<7 | 0x5B, + 37353 - 19968: jis0212<<14 | 0x42<<7 | 0x0B, + 37354 - 19968: jis0212<<14 | 0x42<<7 | 0x0C, + 37356 - 19968: jis0212<<14 | 0x42<<7 | 0x0D, + 37357 - 19968: jis0208<<14 | 0x5B<<7 | 0x02, + 37358 - 19968: jis0208<<14 | 0x5B<<7 | 0x03, + 37359 - 19968: jis0212<<14 | 0x42<<7 | 0x10, + 37360 - 19968: jis0212<<14 | 0x42<<7 | 0x11, + 37361 - 19968: jis0212<<14 | 0x42<<7 | 0x12, + 37365 - 19968: jis0208<<14 | 0x4D<<7 | 0x3F, + 37366 - 19968: jis0208<<14 | 0x4D<<7 | 0x40, + 37367 - 19968: jis0212<<14 | 0x42<<7 | 0x13, + 37369 - 19968: jis0212<<14 | 0x42<<7 | 0x14, + 37371 - 19968: jis0212<<14 | 0x42<<7 | 0x15, + 37372 - 19968: jis0208<<14 | 0x4D<<7 | 0x3E, + 37373 - 19968: jis0212<<14 | 0x42<<7 | 0x16, + 37375 - 19968: jis0208<<14 | 0x4D<<7 | 0x42, + 37376 - 19968: jis0212<<14 | 0x42<<7 | 0x17, + 37377 - 19968: jis0212<<14 | 0x42<<7 | 0x18, + 37380 - 19968: jis0212<<14 | 0x42<<7 | 0x19, + 37381 - 19968: jis0212<<14 | 0x42<<7 | 0x1A, + 37382 - 19968: jis0208<<14 | 0x5B<<7 | 0x06, + 37383 - 19968: jis0212<<14 | 0x42<<7 | 0x1C, + 37385 - 19968: jis0212<<14 | 0x42<<7 | 0x1D, + 37386 - 19968: jis0208<<14 | 0x5B<<7 | 0x08, + 37388 - 19968: jis0212<<14 | 0x42<<7 | 0x1F, + 37389 - 19968: jis0208<<14 | 0x25<<7 | 0x3E, + 37390 - 19968: jis0208<<14 | 0x12<<7 | 0x22, + 37392 - 19968: jis0208<<14 | 0x5B<<7 | 0x07, + 37393 - 19968: jis0208<<14 | 0x4D<<7 | 0x46, + 37394 - 19968: jis0212<<14 | 0x42<<7 | 0x21, + 37395 - 19968: jis0212<<14 | 0x42<<7 | 0x22, + 37396 - 19968: jis0208<<14 | 0x4D<<7 | 0x43, + 37397 - 19968: jis0208<<14 | 0x4D<<7 | 0x45, + 37398 - 19968: jis0212<<14 | 0x42<<7 | 0x23, + 37400 - 19968: jis0212<<14 | 0x42<<7 | 0x24, + 37404 - 19968: jis0212<<14 | 0x42<<7 | 0x25, + 37405 - 19968: jis0212<<14 | 0x42<<7 | 0x26, + 37406 - 19968: jis0208<<14 | 0x4D<<7 | 0x41, + 37411 - 19968: jis0212<<14 | 0x42<<7 | 0x27, + 37412 - 19968: jis0212<<14 | 0x42<<7 | 0x28, + 37413 - 19968: jis0212<<14 | 0x42<<7 | 0x29, + 37414 - 19968: jis0212<<14 | 0x42<<7 | 0x2A, + 37416 - 19968: jis0212<<14 | 0x42<<7 | 0x2B, + 37417 - 19968: jis0208<<14 | 0x4E<<7 | 0x2E, + 37420 - 19968: jis0208<<14 | 0x4D<<7 | 0x44, + 37422 - 19968: jis0212<<14 | 0x42<<7 | 0x2C, + 37423 - 19968: jis0212<<14 | 0x42<<7 | 0x2D, + 37424 - 19968: jis0212<<14 | 0x42<<7 | 0x2E, + 37427 - 19968: jis0212<<14 | 0x42<<7 | 0x2F, + 37428 - 19968: jis0208<<14 | 0x2D<<7 | 0x4A, + 37429 - 19968: jis0212<<14 | 0x42<<7 | 0x30, + 37430 - 19968: jis0212<<14 | 0x42<<7 | 0x31, + 37431 - 19968: jis0208<<14 | 0x17<<7 | 0x39, + 37432 - 19968: jis0212<<14 | 0x42<<7 | 0x32, + 37433 - 19968: jis0208<<14 | 0x5B<<7 | 0x0F, + 37434 - 19968: jis0208<<14 | 0x5B<<7 | 0x09, + 37436 - 19968: jis0208<<14 | 0x5B<<7 | 0x0B, + 37438 - 19968: jis0212<<14 | 0x42<<7 | 0x36, + 37439 - 19968: jis0208<<14 | 0x4D<<7 | 0x4E, + 37440 - 19968: jis0208<<14 | 0x5B<<7 | 0x0A, + 37442 - 19968: jis0212<<14 | 0x42<<7 | 0x38, + 37443 - 19968: jis0212<<14 | 0x42<<7 | 0x39, + 37444 - 19968: jis0208<<14 | 0x24<<7 | 0x13, + 37445 - 19968: jis0208<<14 | 0x4D<<7 | 0x49, + 37446 - 19968: jis0212<<14 | 0x42<<7 | 0x3A, + 37447 - 19968: jis0212<<14 | 0x42<<7 | 0x3B, + 37448 - 19968: jis0208<<14 | 0x4D<<7 | 0x4C, + 37449 - 19968: jis0208<<14 | 0x4D<<7 | 0x4A, + 37450 - 19968: jis0212<<14 | 0x42<<7 | 0x3C, + 37451 - 19968: jis0208<<14 | 0x4D<<7 | 0x4F, + 37453 - 19968: jis0212<<14 | 0x42<<7 | 0x3D, + 37454 - 19968: jis0208<<14 | 0x5B<<7 | 0x0C, + 37455 - 19968: jis0212<<14 | 0x42<<7 | 0x3F, + 37456 - 19968: jis0208<<14 | 0x4D<<7 | 0x50, + 37457 - 19968: jis0208<<14 | 0x5B<<7 | 0x0E, + 37463 - 19968: jis0208<<14 | 0x4D<<7 | 0x48, + 37464 - 19968: jis0212<<14 | 0x42<<7 | 0x41, + 37465 - 19968: jis0208<<14 | 0x5B<<7 | 0x0D, + 37466 - 19968: jis0208<<14 | 0x4D<<7 | 0x55, + 37467 - 19968: jis0208<<14 | 0x10<<7 | 0x53, + 37468 - 19968: jis0212<<14 | 0x42<<7 | 0x43, + 37469 - 19968: jis0212<<14 | 0x42<<7 | 0x44, + 37470 - 19968: jis0208<<14 | 0x4D<<7 | 0x47, + 37472 - 19968: jis0212<<14 | 0x42<<7 | 0x45, + 37473 - 19968: jis0212<<14 | 0x42<<7 | 0x46, + 37474 - 19968: jis0208<<14 | 0x27<<7 | 0x0C, + 37476 - 19968: jis0208<<14 | 0x4D<<7 | 0x4B, + 37477 - 19968: jis0212<<14 | 0x42<<7 | 0x47, + 37478 - 19968: jis0208<<14 | 0x1D<<7 | 0x3F, + 37479 - 19968: jis0208<<14 | 0x5B<<7 | 0x10, + 37480 - 19968: jis0212<<14 | 0x42<<7 | 0x49, + 37481 - 19968: jis0212<<14 | 0x42<<7 | 0x4A, + 37486 - 19968: jis0212<<14 | 0x42<<7 | 0x4B, + 37487 - 19968: jis0212<<14 | 0x42<<7 | 0x4C, + 37488 - 19968: jis0212<<14 | 0x42<<7 | 0x4D, + 37489 - 19968: jis0208<<14 | 0x18<<7 | 0x3A, + 37493 - 19968: jis0212<<14 | 0x42<<7 | 0x4E, + 37494 - 19968: jis0212<<14 | 0x42<<7 | 0x4F, + 37495 - 19968: jis0208<<14 | 0x5B<<7 | 0x12, + 37496 - 19968: jis0208<<14 | 0x5B<<7 | 0x13, + 37497 - 19968: jis0212<<14 | 0x42<<7 | 0x52, + 37499 - 19968: jis0212<<14 | 0x42<<7 | 0x53, + 37500 - 19968: jis0212<<14 | 0x42<<7 | 0x54, + 37501 - 19968: jis0212<<14 | 0x42<<7 | 0x55, + 37502 - 19968: jis0208<<14 | 0x2A<<7 | 0x27, + 37503 - 19968: jis0212<<14 | 0x42<<7 | 0x56, + 37504 - 19968: jis0208<<14 | 0x15<<7 | 0x43, + 37507 - 19968: jis0208<<14 | 0x1C<<7 | 0x25, + 37509 - 19968: jis0208<<14 | 0x25<<7 | 0x1B, + 37512 - 19968: jis0208<<14 | 0x58<<7 | 0x03, + 37513 - 19968: jis0212<<14 | 0x42<<7 | 0x58, + 37514 - 19968: jis0212<<14 | 0x42<<7 | 0x59, + 37517 - 19968: jis0212<<14 | 0x42<<7 | 0x5A, + 37518 - 19968: jis0212<<14 | 0x42<<7 | 0x5B, + 37521 - 19968: jis0208<<14 | 0x20<<7 | 0x0C, + 37522 - 19968: jis0212<<14 | 0x42<<7 | 0x5C, + 37523 - 19968: jis0208<<14 | 0x4D<<7 | 0x53, + 37525 - 19968: jis0208<<14 | 0x4D<<7 | 0x4D, + 37526 - 19968: jis0208<<14 | 0x4D<<7 | 0x52, + 37527 - 19968: jis0212<<14 | 0x42<<7 | 0x5D, + 37528 - 19968: jis0208<<14 | 0x2B<<7 | 0x22, + 37529 - 19968: jis0212<<14 | 0x43<<7 | 0x00, + 37530 - 19968: jis0208<<14 | 0x23<<7 | 0x17, + 37531 - 19968: jis0208<<14 | 0x4D<<7 | 0x54, + 37532 - 19968: jis0208<<14 | 0x4D<<7 | 0x51, + 37535 - 19968: jis0212<<14 | 0x43<<7 | 0x01, + 37536 - 19968: jis0212<<14 | 0x43<<7 | 0x02, + 37540 - 19968: jis0212<<14 | 0x43<<7 | 0x03, + 37541 - 19968: jis0212<<14 | 0x43<<7 | 0x04, + 37543 - 19968: jis0208<<14 | 0x5B<<7 | 0x11, + 37544 - 19968: jis0212<<14 | 0x43<<7 | 0x06, + 37547 - 19968: jis0212<<14 | 0x43<<7 | 0x07, + 37549 - 19968: jis0208<<14 | 0x20<<7 | 0x0B, + 37551 - 19968: jis0212<<14 | 0x43<<7 | 0x08, + 37554 - 19968: jis0212<<14 | 0x43<<7 | 0x09, + 37558 - 19968: jis0212<<14 | 0x43<<7 | 0x0A, + 37559 - 19968: jis0208<<14 | 0x4D<<7 | 0x58, + 37560 - 19968: jis0212<<14 | 0x43<<7 | 0x0B, + 37561 - 19968: jis0208<<14 | 0x4D<<7 | 0x57, + 37562 - 19968: jis0212<<14 | 0x43<<7 | 0x0C, + 37563 - 19968: jis0212<<14 | 0x43<<7 | 0x0D, + 37564 - 19968: jis0212<<14 | 0x43<<7 | 0x0E, + 37565 - 19968: jis0212<<14 | 0x43<<7 | 0x0F, + 37567 - 19968: jis0212<<14 | 0x43<<7 | 0x10, + 37568 - 19968: jis0212<<14 | 0x43<<7 | 0x11, + 37569 - 19968: jis0212<<14 | 0x43<<7 | 0x12, + 37570 - 19968: jis0212<<14 | 0x43<<7 | 0x13, + 37571 - 19968: jis0212<<14 | 0x43<<7 | 0x14, + 37573 - 19968: jis0212<<14 | 0x43<<7 | 0x15, + 37574 - 19968: jis0212<<14 | 0x43<<7 | 0x16, + 37575 - 19968: jis0212<<14 | 0x43<<7 | 0x17, + 37576 - 19968: jis0212<<14 | 0x43<<7 | 0x18, + 37579 - 19968: jis0212<<14 | 0x43<<7 | 0x19, + 37580 - 19968: jis0212<<14 | 0x43<<7 | 0x1A, + 37581 - 19968: jis0212<<14 | 0x43<<7 | 0x1B, + 37582 - 19968: jis0212<<14 | 0x43<<7 | 0x1C, + 37583 - 19968: jis0208<<14 | 0x4D<<7 | 0x56, + 37584 - 19968: jis0208<<14 | 0x5B<<7 | 0x17, + 37586 - 19968: jis0208<<14 | 0x2A<<7 | 0x0E, + 37587 - 19968: jis0208<<14 | 0x5B<<7 | 0x1B, + 37589 - 19968: jis0208<<14 | 0x5B<<7 | 0x19, + 37591 - 19968: jis0208<<14 | 0x5B<<7 | 0x15, + 37592 - 19968: jis0212<<14 | 0x43<<7 | 0x21, + 37593 - 19968: jis0208<<14 | 0x5B<<7 | 0x16, + 37596 - 19968: jis0212<<14 | 0x43<<7 | 0x23, + 37597 - 19968: jis0212<<14 | 0x43<<7 | 0x24, + 37599 - 19968: jis0212<<14 | 0x43<<7 | 0x25, + 37600 - 19968: jis0208<<14 | 0x5B<<7 | 0x1A, + 37601 - 19968: jis0212<<14 | 0x43<<7 | 0x27, + 37603 - 19968: jis0212<<14 | 0x43<<7 | 0x28, + 37604 - 19968: jis0208<<14 | 0x1C<<7 | 0x5A, + 37605 - 19968: jis0212<<14 | 0x43<<7 | 0x29, + 37607 - 19968: jis0208<<14 | 0x5B<<7 | 0x14, + 37608 - 19968: jis0212<<14 | 0x43<<7 | 0x2B, + 37609 - 19968: jis0208<<14 | 0x4D<<7 | 0x59, + 37610 - 19968: jis0208<<14 | 0x29<<7 | 0x3E, + 37612 - 19968: jis0212<<14 | 0x43<<7 | 0x2C, + 37613 - 19968: jis0208<<14 | 0x10<<7 | 0x33, + 37614 - 19968: jis0212<<14 | 0x43<<7 | 0x2D, + 37616 - 19968: jis0212<<14 | 0x43<<7 | 0x2E, + 37618 - 19968: jis0208<<14 | 0x28<<7 | 0x25, + 37619 - 19968: jis0208<<14 | 0x22<<7 | 0x51, + 37624 - 19968: jis0208<<14 | 0x14<<7 | 0x57, + 37625 - 19968: jis0208<<14 | 0x58<<7 | 0x09, + 37626 - 19968: jis0208<<14 | 0x4D<<7 | 0x5B, + 37627 - 19968: jis0208<<14 | 0x5B<<7 | 0x1E, + 37628 - 19968: jis0208<<14 | 0x18<<7 | 0x3C, + 37631 - 19968: jis0208<<14 | 0x5B<<7 | 0x21, + 37632 - 19968: jis0212<<14 | 0x43<<7 | 0x32, + 37634 - 19968: jis0208<<14 | 0x5B<<7 | 0x23, + 37638 - 19968: jis0208<<14 | 0x1A<<7 | 0x0B, + 37640 - 19968: jis0212<<14 | 0x43<<7 | 0x34, + 37645 - 19968: jis0212<<14 | 0x43<<7 | 0x35, + 37647 - 19968: jis0208<<14 | 0x4D<<7 | 0x5A, + 37648 - 19968: jis0208<<14 | 0x1E<<7 | 0x4C, + 37649 - 19968: jis0212<<14 | 0x43<<7 | 0x36, + 37652 - 19968: jis0212<<14 | 0x43<<7 | 0x37, + 37653 - 19968: jis0212<<14 | 0x43<<7 | 0x38, + 37656 - 19968: jis0208<<14 | 0x1E<<7 | 0x4D, + 37657 - 19968: jis0208<<14 | 0x4E<<7 | 0x00, + 37658 - 19968: jis0208<<14 | 0x4E<<7 | 0x02, + 37660 - 19968: jis0212<<14 | 0x43<<7 | 0x39, + 37661 - 19968: jis0208<<14 | 0x5B<<7 | 0x22, + 37662 - 19968: jis0208<<14 | 0x5B<<7 | 0x20, + 37663 - 19968: jis0212<<14 | 0x43<<7 | 0x3C, + 37664 - 19968: jis0208<<14 | 0x1D<<7 | 0x5A, + 37665 - 19968: jis0208<<14 | 0x5B<<7 | 0x1D, + 37666 - 19968: jis0208<<14 | 0x4E<<7 | 0x01, + 37667 - 19968: jis0208<<14 | 0x4E<<7 | 0x03, + 37668 - 19968: jis0212<<14 | 0x43<<7 | 0x3E, + 37669 - 19968: jis0208<<14 | 0x5B<<7 | 0x1C, + 37670 - 19968: jis0208<<14 | 0x15<<7 | 0x32, + 37671 - 19968: jis0212<<14 | 0x43<<7 | 0x40, + 37672 - 19968: jis0208<<14 | 0x28<<7 | 0x24, + 37673 - 19968: jis0212<<14 | 0x43<<7 | 0x41, + 37674 - 19968: jis0212<<14 | 0x43<<7 | 0x42, + 37675 - 19968: jis0208<<14 | 0x1B<<7 | 0x41, + 37676 - 19968: jis0208<<14 | 0x2E<<7 | 0x02, + 37678 - 19968: jis0208<<14 | 0x4D<<7 | 0x5D, + 37679 - 19968: jis0208<<14 | 0x19<<7 | 0x57, + 37682 - 19968: jis0208<<14 | 0x2E<<7 | 0x1E, + 37683 - 19968: jis0212<<14 | 0x43<<7 | 0x43, + 37684 - 19968: jis0212<<14 | 0x43<<7 | 0x44, + 37685 - 19968: jis0208<<14 | 0x4E<<7 | 0x05, + 37686 - 19968: jis0212<<14 | 0x43<<7 | 0x45, + 37687 - 19968: jis0212<<14 | 0x43<<7 | 0x46, + 37690 - 19968: jis0208<<14 | 0x4E<<7 | 0x04, + 37691 - 19968: jis0208<<14 | 0x4E<<7 | 0x06, + 37700 - 19968: jis0208<<14 | 0x4D<<7 | 0x5C, + 37703 - 19968: jis0212<<14 | 0x43<<7 | 0x47, + 37704 - 19968: jis0208<<14 | 0x58<<7 | 0x02, + 37705 - 19968: jis0212<<14 | 0x43<<7 | 0x49, + 37707 - 19968: jis0208<<14 | 0x25<<7 | 0x48, + 37709 - 19968: jis0208<<14 | 0x24<<7 | 0x34, + 37712 - 19968: jis0212<<14 | 0x43<<7 | 0x4A, + 37713 - 19968: jis0212<<14 | 0x43<<7 | 0x4B, + 37714 - 19968: jis0212<<14 | 0x43<<7 | 0x4C, + 37716 - 19968: jis0208<<14 | 0x23<<7 | 0x36, + 37717 - 19968: jis0212<<14 | 0x43<<7 | 0x4D, + 37718 - 19968: jis0208<<14 | 0x4E<<7 | 0x0B, + 37719 - 19968: jis0208<<14 | 0x5B<<7 | 0x25, + 37720 - 19968: jis0212<<14 | 0x43<<7 | 0x4F, + 37722 - 19968: jis0212<<14 | 0x43<<7 | 0x50, + 37723 - 19968: jis0208<<14 | 0x22<<7 | 0x22, + 37724 - 19968: jis0208<<14 | 0x4E<<7 | 0x07, + 37726 - 19968: jis0212<<14 | 0x43<<7 | 0x51, + 37728 - 19968: jis0208<<14 | 0x4E<<7 | 0x08, + 37732 - 19968: jis0212<<14 | 0x43<<7 | 0x52, + 37733 - 19968: jis0212<<14 | 0x43<<7 | 0x53, + 37735 - 19968: jis0212<<14 | 0x43<<7 | 0x54, + 37737 - 19968: jis0212<<14 | 0x43<<7 | 0x55, + 37738 - 19968: jis0212<<14 | 0x43<<7 | 0x56, + 37740 - 19968: jis0208<<14 | 0x16<<7 | 0x0C, + 37741 - 19968: jis0212<<14 | 0x43<<7 | 0x57, + 37742 - 19968: jis0208<<14 | 0x4E<<7 | 0x0A, + 37743 - 19968: jis0212<<14 | 0x43<<7 | 0x58, + 37744 - 19968: jis0208<<14 | 0x5B<<7 | 0x24, + 37745 - 19968: jis0212<<14 | 0x43<<7 | 0x5A, + 37747 - 19968: jis0212<<14 | 0x43<<7 | 0x5B, + 37748 - 19968: jis0212<<14 | 0x43<<7 | 0x5C, + 37749 - 19968: jis0208<<14 | 0x17<<7 | 0x0F, + 37750 - 19968: jis0212<<14 | 0x43<<7 | 0x5D, + 37754 - 19968: jis0212<<14 | 0x44<<7 | 0x00, + 37756 - 19968: jis0208<<14 | 0x4E<<7 | 0x09, + 37757 - 19968: jis0212<<14 | 0x44<<7 | 0x01, + 37758 - 19968: jis0208<<14 | 0x1D<<7 | 0x40, + 37759 - 19968: jis0212<<14 | 0x44<<7 | 0x02, + 37760 - 19968: jis0212<<14 | 0x44<<7 | 0x03, + 37761 - 19968: jis0212<<14 | 0x44<<7 | 0x04, + 37762 - 19968: jis0212<<14 | 0x44<<7 | 0x05, + 37768 - 19968: jis0212<<14 | 0x44<<7 | 0x06, + 37770 - 19968: jis0212<<14 | 0x44<<7 | 0x07, + 37771 - 19968: jis0212<<14 | 0x44<<7 | 0x08, + 37772 - 19968: jis0208<<14 | 0x12<<7 | 0x58, + 37773 - 19968: jis0212<<14 | 0x44<<7 | 0x09, + 37775 - 19968: jis0212<<14 | 0x44<<7 | 0x0A, + 37778 - 19968: jis0212<<14 | 0x44<<7 | 0x0B, + 37780 - 19968: jis0208<<14 | 0x4E<<7 | 0x0F, + 37781 - 19968: jis0212<<14 | 0x44<<7 | 0x0C, + 37782 - 19968: jis0208<<14 | 0x19<<7 | 0x1E, + 37783 - 19968: jis0208<<14 | 0x20<<7 | 0x58, + 37784 - 19968: jis0212<<14 | 0x44<<7 | 0x0D, + 37786 - 19968: jis0208<<14 | 0x23<<7 | 0x29, + 37787 - 19968: jis0212<<14 | 0x44<<7 | 0x0E, + 37790 - 19968: jis0212<<14 | 0x44<<7 | 0x0F, + 37793 - 19968: jis0212<<14 | 0x44<<7 | 0x10, + 37795 - 19968: jis0212<<14 | 0x44<<7 | 0x11, + 37796 - 19968: jis0208<<14 | 0x5B<<7 | 0x26, + 37798 - 19968: jis0212<<14 | 0x44<<7 | 0x13, + 37799 - 19968: jis0208<<14 | 0x12<<7 | 0x1A, + 37800 - 19968: jis0212<<14 | 0x44<<7 | 0x14, + 37801 - 19968: jis0212<<14 | 0x44<<7 | 0x1A, + 37803 - 19968: jis0212<<14 | 0x44<<7 | 0x15, + 37804 - 19968: jis0208<<14 | 0x4E<<7 | 0x0D, + 37805 - 19968: jis0208<<14 | 0x4E<<7 | 0x0E, + 37806 - 19968: jis0208<<14 | 0x23<<7 | 0x22, + 37808 - 19968: jis0208<<14 | 0x4E<<7 | 0x0C, + 37812 - 19968: jis0212<<14 | 0x44<<7 | 0x16, + 37813 - 19968: jis0212<<14 | 0x44<<7 | 0x17, + 37814 - 19968: jis0212<<14 | 0x44<<7 | 0x18, + 37817 - 19968: jis0208<<14 | 0x4E<<7 | 0x10, + 37818 - 19968: jis0212<<14 | 0x44<<7 | 0x19, + 37825 - 19968: jis0212<<14 | 0x44<<7 | 0x1B, + 37827 - 19968: jis0208<<14 | 0x4E<<7 | 0x16, + 37828 - 19968: jis0212<<14 | 0x44<<7 | 0x1C, + 37829 - 19968: jis0212<<14 | 0x44<<7 | 0x1D, + 37830 - 19968: jis0208<<14 | 0x5B<<7 | 0x27, + 37831 - 19968: jis0212<<14 | 0x44<<7 | 0x1F, + 37832 - 19968: jis0208<<14 | 0x4E<<7 | 0x19, + 37833 - 19968: jis0212<<14 | 0x44<<7 | 0x20, + 37834 - 19968: jis0212<<14 | 0x44<<7 | 0x21, + 37835 - 19968: jis0212<<14 | 0x44<<7 | 0x22, + 37836 - 19968: jis0212<<14 | 0x44<<7 | 0x23, + 37837 - 19968: jis0212<<14 | 0x44<<7 | 0x24, + 37840 - 19968: jis0208<<14 | 0x4E<<7 | 0x18, + 37841 - 19968: jis0208<<14 | 0x24<<7 | 0x0C, + 37843 - 19968: jis0212<<14 | 0x44<<7 | 0x25, + 37846 - 19968: jis0208<<14 | 0x4E<<7 | 0x11, + 37847 - 19968: jis0208<<14 | 0x4E<<7 | 0x12, + 37848 - 19968: jis0208<<14 | 0x4E<<7 | 0x15, + 37849 - 19968: jis0212<<14 | 0x44<<7 | 0x26, + 37852 - 19968: jis0212<<14 | 0x44<<7 | 0x27, + 37853 - 19968: jis0208<<14 | 0x4E<<7 | 0x17, + 37854 - 19968: jis0208<<14 | 0x5B<<7 | 0x28, + 37855 - 19968: jis0212<<14 | 0x44<<7 | 0x29, + 37857 - 19968: jis0208<<14 | 0x15<<7 | 0x1F, + 37858 - 19968: jis0212<<14 | 0x44<<7 | 0x2A, + 37860 - 19968: jis0208<<14 | 0x4E<<7 | 0x1A, + 37861 - 19968: jis0208<<14 | 0x4E<<7 | 0x14, + 37862 - 19968: jis0212<<14 | 0x44<<7 | 0x2B, + 37863 - 19968: jis0212<<14 | 0x44<<7 | 0x2C, + 37864 - 19968: jis0208<<14 | 0x4E<<7 | 0x13, + 37879 - 19968: jis0212<<14 | 0x44<<7 | 0x2E, + 37880 - 19968: jis0208<<14 | 0x5B<<7 | 0x29, + 37881 - 19968: jis0212<<14 | 0x44<<7 | 0x2D, + 37882 - 19968: jis0212<<14 | 0x44<<7 | 0x30, + 37883 - 19968: jis0212<<14 | 0x44<<7 | 0x31, + 37885 - 19968: jis0212<<14 | 0x44<<7 | 0x32, + 37889 - 19968: jis0212<<14 | 0x44<<7 | 0x33, + 37890 - 19968: jis0212<<14 | 0x44<<7 | 0x34, + 37891 - 19968: jis0208<<14 | 0x4E<<7 | 0x1E, + 37892 - 19968: jis0212<<14 | 0x44<<7 | 0x35, + 37895 - 19968: jis0208<<14 | 0x4E<<7 | 0x1F, + 37896 - 19968: jis0212<<14 | 0x44<<7 | 0x36, + 37897 - 19968: jis0212<<14 | 0x44<<7 | 0x37, + 37901 - 19968: jis0212<<14 | 0x44<<7 | 0x38, + 37902 - 19968: jis0212<<14 | 0x44<<7 | 0x39, + 37903 - 19968: jis0212<<14 | 0x44<<7 | 0x3A, + 37904 - 19968: jis0208<<14 | 0x4E<<7 | 0x20, + 37907 - 19968: jis0208<<14 | 0x4E<<7 | 0x1D, + 37908 - 19968: jis0208<<14 | 0x4E<<7 | 0x1C, + 37909 - 19968: jis0212<<14 | 0x44<<7 | 0x3B, + 37910 - 19968: jis0212<<14 | 0x44<<7 | 0x3C, + 37911 - 19968: jis0212<<14 | 0x44<<7 | 0x3D, + 37912 - 19968: jis0208<<14 | 0x1D<<7 | 0x41, + 37913 - 19968: jis0208<<14 | 0x25<<7 | 0x09, + 37914 - 19968: jis0208<<14 | 0x4E<<7 | 0x1B, + 37919 - 19968: jis0212<<14 | 0x44<<7 | 0x3E, + 37921 - 19968: jis0208<<14 | 0x4E<<7 | 0x24, + 37931 - 19968: jis0208<<14 | 0x4E<<7 | 0x22, + 37934 - 19968: jis0212<<14 | 0x44<<7 | 0x3F, + 37935 - 19968: jis0212<<14 | 0x44<<7 | 0x40, + 37937 - 19968: jis0208<<14 | 0x5B<<7 | 0x2A, + 37938 - 19968: jis0212<<14 | 0x44<<7 | 0x42, + 37939 - 19968: jis0212<<14 | 0x44<<7 | 0x43, + 37940 - 19968: jis0212<<14 | 0x44<<7 | 0x44, + 37941 - 19968: jis0208<<14 | 0x4E<<7 | 0x23, + 37942 - 19968: jis0208<<14 | 0x4E<<7 | 0x21, + 37944 - 19968: jis0208<<14 | 0x21<<7 | 0x57, + 37946 - 19968: jis0208<<14 | 0x4E<<7 | 0x25, + 37947 - 19968: jis0212<<14 | 0x44<<7 | 0x45, + 37949 - 19968: jis0212<<14 | 0x44<<7 | 0x47, + 37951 - 19968: jis0212<<14 | 0x44<<7 | 0x46, + 37953 - 19968: jis0208<<14 | 0x4E<<7 | 0x26, + 37955 - 19968: jis0212<<14 | 0x44<<7 | 0x48, + 37956 - 19968: jis0208<<14 | 0x4E<<7 | 0x28, + 37957 - 19968: jis0208<<14 | 0x5B<<7 | 0x2B, + 37960 - 19968: jis0208<<14 | 0x5B<<7 | 0x2C, + 37962 - 19968: jis0212<<14 | 0x44<<7 | 0x4B, + 37964 - 19968: jis0212<<14 | 0x44<<7 | 0x4C, + 37969 - 19968: jis0208<<14 | 0x13<<7 | 0x34, + 37970 - 19968: jis0208<<14 | 0x4E<<7 | 0x27, + 37971 - 19968: jis0208<<14 | 0x2B<<7 | 0x59, + 37973 - 19968: jis0212<<14 | 0x44<<7 | 0x4D, + 37977 - 19968: jis0212<<14 | 0x44<<7 | 0x4E, + 37978 - 19968: jis0208<<14 | 0x4E<<7 | 0x33, + 37979 - 19968: jis0208<<14 | 0x4E<<7 | 0x29, + 37980 - 19968: jis0212<<14 | 0x44<<7 | 0x4F, + 37982 - 19968: jis0208<<14 | 0x4E<<7 | 0x2C, + 37983 - 19968: jis0212<<14 | 0x44<<7 | 0x50, + 37984 - 19968: jis0208<<14 | 0x4E<<7 | 0x2A, + 37985 - 19968: jis0212<<14 | 0x44<<7 | 0x51, + 37986 - 19968: jis0208<<14 | 0x4E<<7 | 0x2B, + 37987 - 19968: jis0212<<14 | 0x44<<7 | 0x52, + 37992 - 19968: jis0212<<14 | 0x44<<7 | 0x53, + 37994 - 19968: jis0208<<14 | 0x4E<<7 | 0x2D, + 37995 - 19968: jis0212<<14 | 0x44<<7 | 0x54, + 37997 - 19968: jis0212<<14 | 0x44<<7 | 0x55, + 37998 - 19968: jis0212<<14 | 0x44<<7 | 0x56, + 37999 - 19968: jis0212<<14 | 0x44<<7 | 0x57, + 38000 - 19968: jis0208<<14 | 0x4E<<7 | 0x2F, + 38001 - 19968: jis0212<<14 | 0x44<<7 | 0x58, + 38002 - 19968: jis0212<<14 | 0x44<<7 | 0x59, + 38005 - 19968: jis0208<<14 | 0x4E<<7 | 0x30, + 38007 - 19968: jis0208<<14 | 0x4E<<7 | 0x31, + 38012 - 19968: jis0208<<14 | 0x4E<<7 | 0x34, + 38013 - 19968: jis0208<<14 | 0x4E<<7 | 0x32, + 38014 - 19968: jis0208<<14 | 0x4E<<7 | 0x35, + 38015 - 19968: jis0208<<14 | 0x4E<<7 | 0x37, + 38017 - 19968: jis0208<<14 | 0x4E<<7 | 0x36, + 38019 - 19968: jis0212<<14 | 0x44<<7 | 0x5B, + 38020 - 19968: jis0212<<14 | 0x44<<7 | 0x5A, + 38263 - 19968: jis0208<<14 | 0x23<<7 | 0x18, + 38264 - 19968: jis0212<<14 | 0x44<<7 | 0x5C, + 38265 - 19968: jis0212<<14 | 0x44<<7 | 0x5D, + 38270 - 19968: jis0212<<14 | 0x45<<7 | 0x00, + 38272 - 19968: jis0208<<14 | 0x2B<<7 | 0x46, + 38274 - 19968: jis0208<<14 | 0x4E<<7 | 0x38, + 38275 - 19968: jis0208<<14 | 0x20<<7 | 0x0D, + 38276 - 19968: jis0212<<14 | 0x45<<7 | 0x01, + 38279 - 19968: jis0208<<14 | 0x4E<<7 | 0x39, + 38280 - 19968: jis0212<<14 | 0x45<<7 | 0x02, + 38281 - 19968: jis0208<<14 | 0x29<<7 | 0x23, + 38282 - 19968: jis0208<<14 | 0x4E<<7 | 0x3A, + 38283 - 19968: jis0208<<14 | 0x12<<7 | 0x0A, + 38284 - 19968: jis0212<<14 | 0x45<<7 | 0x03, + 38285 - 19968: jis0212<<14 | 0x45<<7 | 0x04, + 38286 - 19968: jis0212<<14 | 0x45<<7 | 0x05, + 38287 - 19968: jis0208<<14 | 0x10<<7 | 0x1B, + 38289 - 19968: jis0208<<14 | 0x13<<7 | 0x36, + 38290 - 19968: jis0208<<14 | 0x5B<<7 | 0x2D, + 38291 - 19968: jis0208<<14 | 0x13<<7 | 0x35, + 38292 - 19968: jis0208<<14 | 0x4E<<7 | 0x3B, + 38294 - 19968: jis0208<<14 | 0x4E<<7 | 0x3C, + 38296 - 19968: jis0208<<14 | 0x4E<<7 | 0x3D, + 38297 - 19968: jis0208<<14 | 0x4E<<7 | 0x3E, + 38301 - 19968: jis0212<<14 | 0x45<<7 | 0x06, + 38302 - 19968: jis0212<<14 | 0x45<<7 | 0x07, + 38303 - 19968: jis0212<<14 | 0x45<<7 | 0x08, + 38304 - 19968: jis0208<<14 | 0x4E<<7 | 0x3F, + 38305 - 19968: jis0212<<14 | 0x45<<7 | 0x09, + 38306 - 19968: jis0208<<14 | 0x13<<7 | 0x37, + 38307 - 19968: jis0208<<14 | 0x12<<7 | 0x34, + 38308 - 19968: jis0208<<14 | 0x18<<7 | 0x3D, + 38309 - 19968: jis0208<<14 | 0x27<<7 | 0x15, + 38310 - 19968: jis0212<<14 | 0x45<<7 | 0x0A, + 38311 - 19968: jis0208<<14 | 0x4E<<7 | 0x41, + 38312 - 19968: jis0208<<14 | 0x4E<<7 | 0x40, + 38313 - 19968: jis0212<<14 | 0x45<<7 | 0x0B, + 38315 - 19968: jis0212<<14 | 0x45<<7 | 0x0C, + 38316 - 19968: jis0212<<14 | 0x45<<7 | 0x0D, + 38317 - 19968: jis0208<<14 | 0x4E<<7 | 0x42, + 38322 - 19968: jis0208<<14 | 0x10<<7 | 0x3B, + 38324 - 19968: jis0212<<14 | 0x45<<7 | 0x0E, + 38326 - 19968: jis0212<<14 | 0x45<<7 | 0x0F, + 38329 - 19968: jis0208<<14 | 0x4E<<7 | 0x45, + 38330 - 19968: jis0212<<14 | 0x45<<7 | 0x10, + 38331 - 19968: jis0208<<14 | 0x4E<<7 | 0x44, + 38332 - 19968: jis0208<<14 | 0x4E<<7 | 0x43, + 38333 - 19968: jis0212<<14 | 0x45<<7 | 0x11, + 38334 - 19968: jis0208<<14 | 0x4E<<7 | 0x46, + 38335 - 19968: jis0212<<14 | 0x45<<7 | 0x12, + 38339 - 19968: jis0208<<14 | 0x4E<<7 | 0x49, + 38342 - 19968: jis0212<<14 | 0x45<<7 | 0x13, + 38343 - 19968: jis0208<<14 | 0x0F<<7 | 0x26, + 38344 - 19968: jis0212<<14 | 0x45<<7 | 0x14, + 38345 - 19968: jis0212<<14 | 0x45<<7 | 0x15, + 38346 - 19968: jis0208<<14 | 0x4E<<7 | 0x47, + 38347 - 19968: jis0212<<14 | 0x45<<7 | 0x16, + 38348 - 19968: jis0208<<14 | 0x4E<<7 | 0x4B, + 38349 - 19968: jis0208<<14 | 0x4E<<7 | 0x4A, + 38352 - 19968: jis0212<<14 | 0x45<<7 | 0x17, + 38353 - 19968: jis0212<<14 | 0x45<<7 | 0x18, + 38354 - 19968: jis0212<<14 | 0x45<<7 | 0x19, + 38355 - 19968: jis0212<<14 | 0x45<<7 | 0x1A, + 38356 - 19968: jis0208<<14 | 0x4E<<7 | 0x4D, + 38357 - 19968: jis0208<<14 | 0x4E<<7 | 0x4C, + 38358 - 19968: jis0208<<14 | 0x4E<<7 | 0x4E, + 38360 - 19968: jis0208<<14 | 0x25<<7 | 0x0D, + 38361 - 19968: jis0212<<14 | 0x45<<7 | 0x1B, + 38362 - 19968: jis0212<<14 | 0x45<<7 | 0x1C, + 38364 - 19968: jis0208<<14 | 0x4E<<7 | 0x4F, + 38365 - 19968: jis0212<<14 | 0x45<<7 | 0x1D, + 38366 - 19968: jis0212<<14 | 0x45<<7 | 0x1E, + 38367 - 19968: jis0212<<14 | 0x45<<7 | 0x1F, + 38368 - 19968: jis0212<<14 | 0x45<<7 | 0x20, + 38369 - 19968: jis0208<<14 | 0x4E<<7 | 0x50, + 38370 - 19968: jis0208<<14 | 0x4E<<7 | 0x52, + 38372 - 19968: jis0212<<14 | 0x45<<7 | 0x21, + 38373 - 19968: jis0208<<14 | 0x4E<<7 | 0x51, + 38374 - 19968: jis0212<<14 | 0x45<<7 | 0x22, + 38428 - 19968: jis0208<<14 | 0x28<<7 | 0x4B, + 38429 - 19968: jis0212<<14 | 0x45<<7 | 0x23, + 38430 - 19968: jis0212<<14 | 0x45<<7 | 0x24, + 38433 - 19968: jis0208<<14 | 0x4E<<7 | 0x53, + 38434 - 19968: jis0212<<14 | 0x45<<7 | 0x25, + 38436 - 19968: jis0212<<14 | 0x45<<7 | 0x26, + 38437 - 19968: jis0212<<14 | 0x45<<7 | 0x27, + 38438 - 19968: jis0212<<14 | 0x45<<7 | 0x28, + 38440 - 19968: jis0208<<14 | 0x4E<<7 | 0x54, + 38442 - 19968: jis0208<<14 | 0x19<<7 | 0x44, + 38444 - 19968: jis0212<<14 | 0x45<<7 | 0x29, + 38446 - 19968: jis0208<<14 | 0x4E<<7 | 0x55, + 38447 - 19968: jis0208<<14 | 0x4E<<7 | 0x56, + 38449 - 19968: jis0212<<14 | 0x45<<7 | 0x2A, + 38450 - 19968: jis0208<<14 | 0x2A<<7 | 0x28, + 38451 - 19968: jis0212<<14 | 0x45<<7 | 0x2B, + 38455 - 19968: jis0212<<14 | 0x45<<7 | 0x2C, + 38456 - 19968: jis0212<<14 | 0x45<<7 | 0x2D, + 38457 - 19968: jis0212<<14 | 0x45<<7 | 0x2E, + 38458 - 19968: jis0212<<14 | 0x45<<7 | 0x2F, + 38459 - 19968: jis0208<<14 | 0x20<<7 | 0x2A, + 38460 - 19968: jis0212<<14 | 0x45<<7 | 0x30, + 38461 - 19968: jis0212<<14 | 0x45<<7 | 0x31, + 38463 - 19968: jis0208<<14 | 0x0F<<7 | 0x03, + 38464 - 19968: jis0208<<14 | 0x21<<7 | 0x2A, + 38465 - 19968: jis0212<<14 | 0x45<<7 | 0x32, + 38466 - 19968: jis0208<<14 | 0x4E<<7 | 0x57, + 38468 - 19968: jis0208<<14 | 0x28<<7 | 0x4C, + 38475 - 19968: jis0208<<14 | 0x4E<<7 | 0x5A, + 38476 - 19968: jis0208<<14 | 0x4E<<7 | 0x58, + 38477 - 19968: jis0208<<14 | 0x18<<7 | 0x3E, + 38479 - 19968: jis0208<<14 | 0x4E<<7 | 0x59, + 38480 - 19968: jis0208<<14 | 0x17<<7 | 0x21, + 38482 - 19968: jis0212<<14 | 0x45<<7 | 0x33, + 38484 - 19968: jis0212<<14 | 0x45<<7 | 0x34, + 38486 - 19968: jis0212<<14 | 0x45<<7 | 0x35, + 38487 - 19968: jis0212<<14 | 0x45<<7 | 0x36, + 38488 - 19968: jis0212<<14 | 0x45<<7 | 0x37, + 38491 - 19968: jis0208<<14 | 0x29<<7 | 0x24, + 38492 - 19968: jis0208<<14 | 0x4E<<7 | 0x5C, + 38493 - 19968: jis0208<<14 | 0x4F<<7 | 0x00, + 38494 - 19968: jis0208<<14 | 0x4E<<7 | 0x5D, + 38495 - 19968: jis0208<<14 | 0x4F<<7 | 0x01, + 38497 - 19968: jis0212<<14 | 0x45<<7 | 0x38, + 38498 - 19968: jis0208<<14 | 0x10<<7 | 0x00, + 38499 - 19968: jis0208<<14 | 0x1E<<7 | 0x37, + 38500 - 19968: jis0208<<14 | 0x1C<<7 | 0x5B, + 38501 - 19968: jis0208<<14 | 0x13<<7 | 0x38, + 38502 - 19968: jis0208<<14 | 0x4F<<7 | 0x02, + 38506 - 19968: jis0208<<14 | 0x26<<7 | 0x45, + 38508 - 19968: jis0208<<14 | 0x4F<<7 | 0x04, + 38510 - 19968: jis0212<<14 | 0x45<<7 | 0x39, + 38512 - 19968: jis0208<<14 | 0x10<<7 | 0x01, + 38514 - 19968: jis0208<<14 | 0x4F<<7 | 0x03, + 38515 - 19968: jis0208<<14 | 0x23<<7 | 0x23, + 38516 - 19968: jis0212<<14 | 0x45<<7 | 0x3A, + 38517 - 19968: jis0208<<14 | 0x2D<<7 | 0x2C, + 38518 - 19968: jis0208<<14 | 0x25<<7 | 0x0A, + 38519 - 19968: jis0208<<14 | 0x4E<<7 | 0x5B, + 38520 - 19968: jis0208<<14 | 0x2D<<7 | 0x05, + 38522 - 19968: jis0208<<14 | 0x17<<7 | 0x10, + 38523 - 19968: jis0212<<14 | 0x45<<7 | 0x3B, + 38524 - 19968: jis0212<<14 | 0x45<<7 | 0x3C, + 38525 - 19968: jis0208<<14 | 0x2C<<7 | 0x3A, + 38526 - 19968: jis0212<<14 | 0x45<<7 | 0x3D, + 38527 - 19968: jis0212<<14 | 0x45<<7 | 0x3E, + 38529 - 19968: jis0212<<14 | 0x45<<7 | 0x3F, + 38530 - 19968: jis0212<<14 | 0x45<<7 | 0x40, + 38531 - 19968: jis0212<<14 | 0x45<<7 | 0x41, + 38532 - 19968: jis0212<<14 | 0x45<<7 | 0x42, + 38533 - 19968: jis0208<<14 | 0x15<<7 | 0x58, + 38534 - 19968: jis0208<<14 | 0x2D<<7 | 0x13, + 38536 - 19968: jis0208<<14 | 0x16<<7 | 0x07, + 38537 - 19968: jis0212<<14 | 0x45<<7 | 0x43, + 38538 - 19968: jis0208<<14 | 0x21<<7 | 0x41, + 38539 - 19968: jis0208<<14 | 0x46<<7 | 0x00, + 38541 - 19968: jis0208<<14 | 0x4F<<7 | 0x05, + 38542 - 19968: jis0208<<14 | 0x12<<7 | 0x0B, + 38543 - 19968: jis0208<<14 | 0x1E<<7 | 0x4E, + 38545 - 19968: jis0212<<14 | 0x45<<7 | 0x44, + 38548 - 19968: jis0208<<14 | 0x12<<7 | 0x35, + 38549 - 19968: jis0208<<14 | 0x4F<<7 | 0x07, + 38550 - 19968: jis0212<<14 | 0x45<<7 | 0x45, + 38551 - 19968: jis0208<<14 | 0x4F<<7 | 0x08, + 38552 - 19968: jis0208<<14 | 0x4F<<7 | 0x06, + 38553 - 19968: jis0208<<14 | 0x16<<7 | 0x43, + 38554 - 19968: jis0212<<14 | 0x45<<7 | 0x46, + 38555 - 19968: jis0208<<14 | 0x19<<7 | 0x3C, + 38556 - 19968: jis0208<<14 | 0x1D<<7 | 0x42, + 38557 - 19968: jis0208<<14 | 0x5B<<7 | 0x30, + 38559 - 19968: jis0212<<14 | 0x45<<7 | 0x48, + 38560 - 19968: jis0208<<14 | 0x10<<7 | 0x02, + 38563 - 19968: jis0208<<14 | 0x2D<<7 | 0x38, + 38564 - 19968: jis0212<<14 | 0x45<<7 | 0x49, + 38565 - 19968: jis0212<<14 | 0x45<<7 | 0x4A, + 38566 - 19968: jis0212<<14 | 0x45<<7 | 0x4B, + 38567 - 19968: jis0208<<14 | 0x4F<<7 | 0x0A, + 38568 - 19968: jis0208<<14 | 0x4D<<7 | 0x0D, + 38569 - 19968: jis0212<<14 | 0x45<<7 | 0x4C, + 38570 - 19968: jis0208<<14 | 0x4F<<7 | 0x09, + 38574 - 19968: jis0212<<14 | 0x45<<7 | 0x4D, + 38575 - 19968: jis0208<<14 | 0x5B<<7 | 0x31, + 38576 - 19968: jis0208<<14 | 0x4F<<7 | 0x0D, + 38577 - 19968: jis0208<<14 | 0x4F<<7 | 0x0B, + 38578 - 19968: jis0208<<14 | 0x4F<<7 | 0x0C, + 38579 - 19968: jis0212<<14 | 0x45<<7 | 0x4F, + 38580 - 19968: jis0208<<14 | 0x4F<<7 | 0x0E, + 38582 - 19968: jis0208<<14 | 0x4F<<7 | 0x0F, + 38583 - 19968: jis0208<<14 | 0x2D<<7 | 0x4B, + 38584 - 19968: jis0208<<14 | 0x4F<<7 | 0x10, + 38585 - 19968: jis0208<<14 | 0x4F<<7 | 0x11, + 38586 - 19968: jis0212<<14 | 0x45<<7 | 0x50, + 38587 - 19968: jis0208<<14 | 0x1F<<7 | 0x28, + 38588 - 19968: jis0208<<14 | 0x27<<7 | 0x1A, + 38592 - 19968: jis0208<<14 | 0x1E<<7 | 0x5C, + 38593 - 19968: jis0208<<14 | 0x13<<7 | 0x46, + 38596 - 19968: jis0208<<14 | 0x2C<<7 | 0x19, + 38597 - 19968: jis0208<<14 | 0x11<<7 | 0x4C, + 38598 - 19968: jis0208<<14 | 0x1C<<7 | 0x17, + 38599 - 19968: jis0208<<14 | 0x17<<7 | 0x3A, + 38601 - 19968: jis0208<<14 | 0x4F<<7 | 0x14, + 38602 - 19968: jis0212<<14 | 0x45<<7 | 0x51, + 38603 - 19968: jis0208<<14 | 0x4F<<7 | 0x13, + 38604 - 19968: jis0208<<14 | 0x1A<<7 | 0x52, + 38605 - 19968: jis0208<<14 | 0x4F<<7 | 0x15, + 38606 - 19968: jis0208<<14 | 0x4F<<7 | 0x12, + 38609 - 19968: jis0208<<14 | 0x1A<<7 | 0x07, + 38610 - 19968: jis0212<<14 | 0x45<<7 | 0x52, + 38613 - 19968: jis0208<<14 | 0x4F<<7 | 0x19, + 38614 - 19968: jis0208<<14 | 0x49<<7 | 0x0C, + 38616 - 19968: jis0212<<14 | 0x45<<7 | 0x54, + 38617 - 19968: jis0208<<14 | 0x31<<7 | 0x35, + 38618 - 19968: jis0212<<14 | 0x45<<7 | 0x55, + 38619 - 19968: jis0208<<14 | 0x1E<<7 | 0x56, + 38620 - 19968: jis0208<<14 | 0x4F<<7 | 0x17, + 38621 - 19968: jis0212<<14 | 0x45<<7 | 0x56, + 38622 - 19968: jis0212<<14 | 0x45<<7 | 0x57, + 38623 - 19968: jis0212<<14 | 0x45<<7 | 0x58, + 38626 - 19968: jis0208<<14 | 0x2D<<7 | 0x04, + 38627 - 19968: jis0208<<14 | 0x25<<7 | 0x50, + 38632 - 19968: jis0208<<14 | 0x10<<7 | 0x0A, + 38633 - 19968: jis0212<<14 | 0x45<<7 | 0x59, + 38634 - 19968: jis0208<<14 | 0x1F<<7 | 0x42, + 38635 - 19968: jis0208<<14 | 0x1B<<7 | 0x15, + 38639 - 19968: jis0212<<14 | 0x45<<7 | 0x5A, + 38640 - 19968: jis0208<<14 | 0x29<<7 | 0x16, + 38641 - 19968: jis0212<<14 | 0x45<<7 | 0x5B, + 38642 - 19968: jis0208<<14 | 0x10<<7 | 0x1F, + 38646 - 19968: jis0208<<14 | 0x2D<<7 | 0x4C, + 38647 - 19968: jis0208<<14 | 0x2C<<7 | 0x4A, + 38649 - 19968: jis0208<<14 | 0x4F<<7 | 0x1A, + 38650 - 19968: jis0212<<14 | 0x45<<7 | 0x5C, + 38651 - 19968: jis0208<<14 | 0x24<<7 | 0x24, + 38656 - 19968: jis0208<<14 | 0x1B<<7 | 0x5A, + 38658 - 19968: jis0212<<14 | 0x45<<7 | 0x5D, + 38659 - 19968: jis0212<<14 | 0x46<<7 | 0x00, + 38660 - 19968: jis0208<<14 | 0x4F<<7 | 0x1B, + 38661 - 19968: jis0212<<14 | 0x46<<7 | 0x01, + 38662 - 19968: jis0208<<14 | 0x4F<<7 | 0x1C, + 38663 - 19968: jis0208<<14 | 0x1E<<7 | 0x2B, + 38664 - 19968: jis0208<<14 | 0x4F<<7 | 0x1D, + 38665 - 19968: jis0212<<14 | 0x46<<7 | 0x02, + 38666 - 19968: jis0208<<14 | 0x2D<<7 | 0x4D, + 38669 - 19968: jis0208<<14 | 0x4F<<7 | 0x18, + 38670 - 19968: jis0208<<14 | 0x4F<<7 | 0x1F, + 38671 - 19968: jis0208<<14 | 0x4F<<7 | 0x21, + 38673 - 19968: jis0208<<14 | 0x4F<<7 | 0x20, + 38675 - 19968: jis0208<<14 | 0x4F<<7 | 0x1E, + 38678 - 19968: jis0208<<14 | 0x4F<<7 | 0x22, + 38681 - 19968: jis0208<<14 | 0x4F<<7 | 0x23, + 38682 - 19968: jis0212<<14 | 0x46<<7 | 0x03, + 38683 - 19968: jis0212<<14 | 0x46<<7 | 0x04, + 38684 - 19968: jis0208<<14 | 0x20<<7 | 0x59, + 38685 - 19968: jis0212<<14 | 0x46<<7 | 0x05, + 38686 - 19968: jis0208<<14 | 0x11<<7 | 0x41, + 38689 - 19968: jis0212<<14 | 0x46<<7 | 0x06, + 38690 - 19968: jis0212<<14 | 0x46<<7 | 0x07, + 38691 - 19968: jis0212<<14 | 0x46<<7 | 0x08, + 38692 - 19968: jis0208<<14 | 0x4F<<7 | 0x24, + 38695 - 19968: jis0208<<14 | 0x2B<<7 | 0x17, + 38696 - 19968: jis0212<<14 | 0x46<<7 | 0x09, + 38698 - 19968: jis0208<<14 | 0x4F<<7 | 0x25, + 38704 - 19968: jis0208<<14 | 0x4F<<7 | 0x26, + 38705 - 19968: jis0212<<14 | 0x46<<7 | 0x0A, + 38706 - 19968: jis0208<<14 | 0x2E<<7 | 0x09, + 38707 - 19968: jis0208<<14 | 0x5B<<7 | 0x32, + 38712 - 19968: jis0208<<14 | 0x3A<<7 | 0x10, + 38713 - 19968: jis0208<<14 | 0x4F<<7 | 0x27, + 38715 - 19968: jis0208<<14 | 0x5B<<7 | 0x33, + 38717 - 19968: jis0208<<14 | 0x4F<<7 | 0x28, + 38718 - 19968: jis0208<<14 | 0x4F<<7 | 0x29, + 38721 - 19968: jis0212<<14 | 0x46<<7 | 0x0C, + 38722 - 19968: jis0208<<14 | 0x4F<<7 | 0x2D, + 38723 - 19968: jis0208<<14 | 0x5B<<7 | 0x34, + 38724 - 19968: jis0208<<14 | 0x4F<<7 | 0x2A, + 38726 - 19968: jis0208<<14 | 0x4F<<7 | 0x2B, + 38728 - 19968: jis0208<<14 | 0x4F<<7 | 0x2C, + 38729 - 19968: jis0208<<14 | 0x4F<<7 | 0x2E, + 38730 - 19968: jis0212<<14 | 0x46<<7 | 0x0E, + 38733 - 19968: jis0208<<14 | 0x5B<<7 | 0x35, + 38734 - 19968: jis0212<<14 | 0x46<<7 | 0x0F, + 38735 - 19968: jis0208<<14 | 0x5B<<7 | 0x36, + 38737 - 19968: jis0208<<14 | 0x5B<<7 | 0x37, + 38738 - 19968: jis0208<<14 | 0x1F<<7 | 0x23, + 38741 - 19968: jis0208<<14 | 0x5B<<7 | 0x38, + 38742 - 19968: jis0208<<14 | 0x2B<<7 | 0x56, + 38743 - 19968: jis0212<<14 | 0x46<<7 | 0x12, + 38744 - 19968: jis0212<<14 | 0x46<<7 | 0x13, + 38745 - 19968: jis0208<<14 | 0x1F<<7 | 0x24, + 38746 - 19968: jis0212<<14 | 0x46<<7 | 0x14, + 38747 - 19968: jis0212<<14 | 0x46<<7 | 0x15, + 38748 - 19968: jis0208<<14 | 0x4F<<7 | 0x2F, + 38750 - 19968: jis0208<<14 | 0x27<<7 | 0x52, + 38752 - 19968: jis0208<<14 | 0x4F<<7 | 0x30, + 38753 - 19968: jis0208<<14 | 0x52<<7 | 0x32, + 38754 - 19968: jis0208<<14 | 0x2B<<7 | 0x2B, + 38755 - 19968: jis0212<<14 | 0x46<<7 | 0x16, + 38756 - 19968: jis0208<<14 | 0x4F<<7 | 0x31, + 38758 - 19968: jis0208<<14 | 0x4F<<7 | 0x32, + 38759 - 19968: jis0212<<14 | 0x46<<7 | 0x17, + 38760 - 19968: jis0208<<14 | 0x4F<<7 | 0x33, + 38761 - 19968: jis0208<<14 | 0x12<<7 | 0x36, + 38762 - 19968: jis0212<<14 | 0x46<<7 | 0x18, + 38763 - 19968: jis0208<<14 | 0x4F<<7 | 0x35, + 38765 - 19968: jis0208<<14 | 0x1E<<7 | 0x38, + 38766 - 19968: jis0212<<14 | 0x46<<7 | 0x19, + 38769 - 19968: jis0208<<14 | 0x4F<<7 | 0x36, + 38771 - 19968: jis0212<<14 | 0x46<<7 | 0x1A, + 38772 - 19968: jis0208<<14 | 0x16<<7 | 0x03, + 38774 - 19968: jis0212<<14 | 0x46<<7 | 0x1B, + 38775 - 19968: jis0212<<14 | 0x46<<7 | 0x1C, + 38776 - 19968: jis0212<<14 | 0x46<<7 | 0x1D, + 38777 - 19968: jis0208<<14 | 0x4F<<7 | 0x37, + 38778 - 19968: jis0208<<14 | 0x4F<<7 | 0x3B, + 38779 - 19968: jis0212<<14 | 0x46<<7 | 0x1E, + 38780 - 19968: jis0208<<14 | 0x4F<<7 | 0x39, + 38781 - 19968: jis0212<<14 | 0x46<<7 | 0x1F, + 38783 - 19968: jis0212<<14 | 0x46<<7 | 0x20, + 38784 - 19968: jis0212<<14 | 0x46<<7 | 0x21, + 38785 - 19968: jis0208<<14 | 0x4F<<7 | 0x3A, + 38788 - 19968: jis0208<<14 | 0x12<<7 | 0x52, + 38789 - 19968: jis0208<<14 | 0x4F<<7 | 0x38, + 38790 - 19968: jis0208<<14 | 0x4F<<7 | 0x3C, + 38793 - 19968: jis0212<<14 | 0x46<<7 | 0x22, + 38795 - 19968: jis0208<<14 | 0x4F<<7 | 0x3D, + 38797 - 19968: jis0208<<14 | 0x0F<<7 | 0x27, + 38799 - 19968: jis0208<<14 | 0x4F<<7 | 0x3E, + 38800 - 19968: jis0208<<14 | 0x4F<<7 | 0x3F, + 38805 - 19968: jis0212<<14 | 0x46<<7 | 0x23, + 38806 - 19968: jis0212<<14 | 0x46<<7 | 0x24, + 38807 - 19968: jis0212<<14 | 0x46<<7 | 0x25, + 38808 - 19968: jis0208<<14 | 0x1D<<7 | 0x43, + 38809 - 19968: jis0212<<14 | 0x46<<7 | 0x26, + 38810 - 19968: jis0212<<14 | 0x46<<7 | 0x27, + 38812 - 19968: jis0208<<14 | 0x4F<<7 | 0x40, + 38814 - 19968: jis0212<<14 | 0x46<<7 | 0x28, + 38815 - 19968: jis0212<<14 | 0x46<<7 | 0x29, + 38816 - 19968: jis0208<<14 | 0x14<<7 | 0x26, + 38818 - 19968: jis0212<<14 | 0x46<<7 | 0x2A, + 38819 - 19968: jis0208<<14 | 0x4F<<7 | 0x43, + 38822 - 19968: jis0208<<14 | 0x4F<<7 | 0x42, + 38824 - 19968: jis0208<<14 | 0x4F<<7 | 0x41, + 38827 - 19968: jis0208<<14 | 0x4A<<7 | 0x50, + 38828 - 19968: jis0212<<14 | 0x46<<7 | 0x2B, + 38829 - 19968: jis0208<<14 | 0x29<<7 | 0x3B, + 38830 - 19968: jis0212<<14 | 0x46<<7 | 0x2C, + 38833 - 19968: jis0212<<14 | 0x46<<7 | 0x2D, + 38834 - 19968: jis0212<<14 | 0x46<<7 | 0x2E, + 38835 - 19968: jis0208<<14 | 0x4F<<7 | 0x44, + 38836 - 19968: jis0208<<14 | 0x4F<<7 | 0x45, + 38837 - 19968: jis0212<<14 | 0x46<<7 | 0x2F, + 38838 - 19968: jis0212<<14 | 0x46<<7 | 0x30, + 38840 - 19968: jis0212<<14 | 0x46<<7 | 0x31, + 38841 - 19968: jis0212<<14 | 0x46<<7 | 0x32, + 38842 - 19968: jis0212<<14 | 0x46<<7 | 0x33, + 38844 - 19968: jis0212<<14 | 0x46<<7 | 0x34, + 38846 - 19968: jis0212<<14 | 0x46<<7 | 0x35, + 38847 - 19968: jis0212<<14 | 0x46<<7 | 0x36, + 38849 - 19968: jis0212<<14 | 0x46<<7 | 0x37, + 38851 - 19968: jis0208<<14 | 0x4F<<7 | 0x46, + 38852 - 19968: jis0212<<14 | 0x46<<7 | 0x38, + 38853 - 19968: jis0212<<14 | 0x46<<7 | 0x39, + 38854 - 19968: jis0208<<14 | 0x4F<<7 | 0x47, + 38855 - 19968: jis0212<<14 | 0x46<<7 | 0x3A, + 38856 - 19968: jis0208<<14 | 0x4F<<7 | 0x48, + 38857 - 19968: jis0212<<14 | 0x46<<7 | 0x3B, + 38858 - 19968: jis0212<<14 | 0x46<<7 | 0x3C, + 38859 - 19968: jis0208<<14 | 0x4F<<7 | 0x49, + 38860 - 19968: jis0212<<14 | 0x46<<7 | 0x3D, + 38861 - 19968: jis0212<<14 | 0x46<<7 | 0x3E, + 38862 - 19968: jis0212<<14 | 0x46<<7 | 0x3F, + 38864 - 19968: jis0212<<14 | 0x46<<7 | 0x40, + 38865 - 19968: jis0212<<14 | 0x46<<7 | 0x41, + 38867 - 19968: jis0208<<14 | 0x13<<7 | 0x39, + 38868 - 19968: jis0212<<14 | 0x46<<7 | 0x42, + 38871 - 19968: jis0212<<14 | 0x46<<7 | 0x43, + 38872 - 19968: jis0212<<14 | 0x46<<7 | 0x44, + 38873 - 19968: jis0212<<14 | 0x46<<7 | 0x45, + 38875 - 19968: jis0212<<14 | 0x46<<7 | 0x49, + 38876 - 19968: jis0208<<14 | 0x4F<<7 | 0x4A, + 38877 - 19968: jis0212<<14 | 0x46<<7 | 0x46, + 38878 - 19968: jis0212<<14 | 0x46<<7 | 0x47, + 38880 - 19968: jis0212<<14 | 0x46<<7 | 0x48, + 38881 - 19968: jis0212<<14 | 0x46<<7 | 0x4A, + 38884 - 19968: jis0212<<14 | 0x46<<7 | 0x4B, + 38893 - 19968: jis0208<<14 | 0x4F<<7 | 0x4B, + 38894 - 19968: jis0208<<14 | 0x26<<7 | 0x02, + 38895 - 19968: jis0212<<14 | 0x46<<7 | 0x4C, + 38897 - 19968: jis0212<<14 | 0x46<<7 | 0x4D, + 38898 - 19968: jis0208<<14 | 0x4F<<7 | 0x4D, + 38899 - 19968: jis0208<<14 | 0x11<<7 | 0x1A, + 38900 - 19968: jis0212<<14 | 0x46<<7 | 0x4E, + 38901 - 19968: jis0208<<14 | 0x4F<<7 | 0x50, + 38902 - 19968: jis0208<<14 | 0x4F<<7 | 0x4F, + 38903 - 19968: jis0212<<14 | 0x46<<7 | 0x4F, + 38904 - 19968: jis0212<<14 | 0x46<<7 | 0x50, + 38906 - 19968: jis0212<<14 | 0x46<<7 | 0x51, + 38907 - 19968: jis0208<<14 | 0x10<<7 | 0x03, + 38911 - 19968: jis0208<<14 | 0x15<<7 | 0x20, + 38913 - 19968: jis0208<<14 | 0x29<<7 | 0x26, + 38914 - 19968: jis0208<<14 | 0x23<<7 | 0x19, + 38915 - 19968: jis0208<<14 | 0x19<<7 | 0x01, + 38917 - 19968: jis0208<<14 | 0x18<<7 | 0x3F, + 38918 - 19968: jis0208<<14 | 0x1C<<7 | 0x46, + 38919 - 19968: jis0212<<14 | 0x46<<7 | 0x52, + 38920 - 19968: jis0208<<14 | 0x1E<<7 | 0x3B, + 38922 - 19968: jis0212<<14 | 0x46<<7 | 0x53, + 38924 - 19968: jis0208<<14 | 0x4F<<7 | 0x52, + 38925 - 19968: jis0212<<14 | 0x46<<7 | 0x55, + 38926 - 19968: jis0212<<14 | 0x46<<7 | 0x56, + 38927 - 19968: jis0208<<14 | 0x4F<<7 | 0x51, + 38928 - 19968: jis0208<<14 | 0x2C<<7 | 0x21, + 38929 - 19968: jis0208<<14 | 0x13<<7 | 0x47, + 38930 - 19968: jis0208<<14 | 0x27<<7 | 0x31, + 38931 - 19968: jis0208<<14 | 0x25<<7 | 0x3B, + 38932 - 19968: jis0212<<14 | 0x46<<7 | 0x57, + 38934 - 19968: jis0212<<14 | 0x46<<7 | 0x58, + 38935 - 19968: jis0208<<14 | 0x1E<<7 | 0x5B, + 38936 - 19968: jis0208<<14 | 0x2D<<7 | 0x2D, + 38937 - 19968: jis0212<<14 | 0x46<<7 | 0x54, + 38938 - 19968: jis0208<<14 | 0x16<<7 | 0x3A, + 38940 - 19968: jis0212<<14 | 0x46<<7 | 0x59, + 38942 - 19968: jis0212<<14 | 0x46<<7 | 0x5A, + 38944 - 19968: jis0212<<14 | 0x46<<7 | 0x5B, + 38945 - 19968: jis0208<<14 | 0x4F<<7 | 0x55, + 38947 - 19968: jis0212<<14 | 0x46<<7 | 0x5C, + 38948 - 19968: jis0208<<14 | 0x4F<<7 | 0x54, + 38949 - 19968: jis0212<<14 | 0x47<<7 | 0x07, + 38950 - 19968: jis0212<<14 | 0x46<<7 | 0x5D, + 38955 - 19968: jis0212<<14 | 0x47<<7 | 0x00, + 38956 - 19968: jis0208<<14 | 0x2A<<7 | 0x2A, + 38957 - 19968: jis0208<<14 | 0x25<<7 | 0x0B, + 38958 - 19968: jis0212<<14 | 0x47<<7 | 0x01, + 38959 - 19968: jis0212<<14 | 0x47<<7 | 0x02, + 38960 - 19968: jis0212<<14 | 0x47<<7 | 0x03, + 38962 - 19968: jis0212<<14 | 0x47<<7 | 0x04, + 38963 - 19968: jis0212<<14 | 0x47<<7 | 0x05, + 38964 - 19968: jis0208<<14 | 0x10<<7 | 0x2F, + 38965 - 19968: jis0212<<14 | 0x47<<7 | 0x06, + 38967 - 19968: jis0208<<14 | 0x4F<<7 | 0x56, + 38968 - 19968: jis0208<<14 | 0x4F<<7 | 0x53, + 38971 - 19968: jis0208<<14 | 0x28<<7 | 0x30, + 38972 - 19968: jis0208<<14 | 0x2C<<7 | 0x49, + 38973 - 19968: jis0208<<14 | 0x4F<<7 | 0x57, + 38974 - 19968: jis0212<<14 | 0x47<<7 | 0x08, + 38980 - 19968: jis0212<<14 | 0x47<<7 | 0x09, + 38982 - 19968: jis0208<<14 | 0x4F<<7 | 0x58, + 38983 - 19968: jis0212<<14 | 0x47<<7 | 0x0A, + 38986 - 19968: jis0212<<14 | 0x47<<7 | 0x0B, + 38987 - 19968: jis0208<<14 | 0x4F<<7 | 0x5A, + 38988 - 19968: jis0208<<14 | 0x21<<7 | 0x49, + 38989 - 19968: jis0208<<14 | 0x12<<7 | 0x3A, + 38990 - 19968: jis0208<<14 | 0x12<<7 | 0x3B, + 38991 - 19968: jis0208<<14 | 0x4F<<7 | 0x59, + 38993 - 19968: jis0212<<14 | 0x47<<7 | 0x0C, + 38994 - 19968: jis0212<<14 | 0x47<<7 | 0x0D, + 38995 - 19968: jis0212<<14 | 0x47<<7 | 0x0E, + 38996 - 19968: jis0208<<14 | 0x13<<7 | 0x48, + 38997 - 19968: jis0208<<14 | 0x17<<7 | 0x11, + 38998 - 19968: jis0212<<14 | 0x47<<7 | 0x0F, + 38999 - 19968: jis0208<<14 | 0x5B<<7 | 0x39, + 39000 - 19968: jis0208<<14 | 0x13<<7 | 0x49, + 39001 - 19968: jis0212<<14 | 0x47<<7 | 0x11, + 39002 - 19968: jis0212<<14 | 0x47<<7 | 0x12, + 39003 - 19968: jis0208<<14 | 0x24<<7 | 0x1E, + 39006 - 19968: jis0208<<14 | 0x2D<<7 | 0x3F, + 39010 - 19968: jis0212<<14 | 0x47<<7 | 0x13, + 39011 - 19968: jis0212<<14 | 0x47<<7 | 0x14, + 39013 - 19968: jis0208<<14 | 0x5B<<7 | 0x3A, + 39014 - 19968: jis0212<<14 | 0x47<<7 | 0x16, + 39015 - 19968: jis0208<<14 | 0x17<<7 | 0x3B, + 39018 - 19968: jis0212<<14 | 0x47<<7 | 0x17, + 39019 - 19968: jis0208<<14 | 0x4F<<7 | 0x5B, + 39020 - 19968: jis0212<<14 | 0x47<<7 | 0x18, + 39023 - 19968: jis0208<<14 | 0x4F<<7 | 0x5C, + 39024 - 19968: jis0208<<14 | 0x4F<<7 | 0x5D, + 39025 - 19968: jis0208<<14 | 0x50<<7 | 0x00, + 39027 - 19968: jis0208<<14 | 0x50<<7 | 0x02, + 39028 - 19968: jis0208<<14 | 0x50<<7 | 0x01, + 39080 - 19968: jis0208<<14 | 0x28<<7 | 0x56, + 39082 - 19968: jis0208<<14 | 0x50<<7 | 0x03, + 39083 - 19968: jis0212<<14 | 0x47<<7 | 0x19, + 39085 - 19968: jis0212<<14 | 0x47<<7 | 0x1A, + 39086 - 19968: jis0212<<14 | 0x47<<7 | 0x1B, + 39087 - 19968: jis0208<<14 | 0x50<<7 | 0x04, + 39088 - 19968: jis0212<<14 | 0x47<<7 | 0x1C, + 39089 - 19968: jis0208<<14 | 0x50<<7 | 0x05, + 39092 - 19968: jis0212<<14 | 0x47<<7 | 0x1D, + 39094 - 19968: jis0208<<14 | 0x50<<7 | 0x06, + 39095 - 19968: jis0212<<14 | 0x47<<7 | 0x1E, + 39096 - 19968: jis0212<<14 | 0x47<<7 | 0x1F, + 39098 - 19968: jis0212<<14 | 0x47<<7 | 0x20, + 39099 - 19968: jis0212<<14 | 0x47<<7 | 0x21, + 39103 - 19968: jis0212<<14 | 0x47<<7 | 0x22, + 39106 - 19968: jis0212<<14 | 0x47<<7 | 0x23, + 39107 - 19968: jis0208<<14 | 0x50<<7 | 0x08, + 39108 - 19968: jis0208<<14 | 0x50<<7 | 0x07, + 39109 - 19968: jis0212<<14 | 0x47<<7 | 0x24, + 39110 - 19968: jis0208<<14 | 0x50<<7 | 0x09, + 39112 - 19968: jis0212<<14 | 0x47<<7 | 0x25, + 39116 - 19968: jis0212<<14 | 0x47<<7 | 0x26, + 39131 - 19968: jis0208<<14 | 0x27<<7 | 0x53, + 39132 - 19968: jis0208<<14 | 0x45<<7 | 0x2B, + 39135 - 19968: jis0208<<14 | 0x1E<<7 | 0x08, + 39137 - 19968: jis0212<<14 | 0x47<<7 | 0x27, + 39138 - 19968: jis0208<<14 | 0x14<<7 | 0x11, + 39139 - 19968: jis0212<<14 | 0x47<<7 | 0x28, + 39141 - 19968: jis0212<<14 | 0x47<<7 | 0x29, + 39142 - 19968: jis0212<<14 | 0x47<<7 | 0x2A, + 39143 - 19968: jis0212<<14 | 0x47<<7 | 0x2B, + 39145 - 19968: jis0208<<14 | 0x50<<7 | 0x0A, + 39146 - 19968: jis0212<<14 | 0x47<<7 | 0x2C, + 39147 - 19968: jis0208<<14 | 0x50<<7 | 0x0B, + 39149 - 19968: jis0208<<14 | 0x31<<7 | 0x0B, + 39150 - 19968: jis0208<<14 | 0x3C<<7 | 0x1A, + 39151 - 19968: jis0208<<14 | 0x27<<7 | 0x32, + 39154 - 19968: jis0208<<14 | 0x0F<<7 | 0x5A, + 39155 - 19968: jis0212<<14 | 0x47<<7 | 0x2D, + 39156 - 19968: jis0208<<14 | 0x0F<<7 | 0x1A, + 39158 - 19968: jis0212<<14 | 0x47<<7 | 0x2E, + 39164 - 19968: jis0208<<14 | 0x1A<<7 | 0x53, + 39165 - 19968: jis0208<<14 | 0x2A<<7 | 0x0F, + 39166 - 19968: jis0208<<14 | 0x1D<<7 | 0x5D, + 39170 - 19968: jis0212<<14 | 0x47<<7 | 0x2F, + 39171 - 19968: jis0208<<14 | 0x50<<7 | 0x0C, + 39173 - 19968: jis0208<<14 | 0x2B<<7 | 0x3E, + 39175 - 19968: jis0212<<14 | 0x47<<7 | 0x30, + 39176 - 19968: jis0212<<14 | 0x47<<7 | 0x31, + 39177 - 19968: jis0208<<14 | 0x50<<7 | 0x0D, + 39178 - 19968: jis0208<<14 | 0x2C<<7 | 0x3B, + 39180 - 19968: jis0208<<14 | 0x10<<7 | 0x21, + 39184 - 19968: jis0208<<14 | 0x1A<<7 | 0x20, + 39185 - 19968: jis0212<<14 | 0x47<<7 | 0x32, + 39186 - 19968: jis0208<<14 | 0x50<<7 | 0x0E, + 39187 - 19968: jis0208<<14 | 0x11<<7 | 0x4D, + 39188 - 19968: jis0208<<14 | 0x50<<7 | 0x0F, + 39189 - 19968: jis0212<<14 | 0x47<<7 | 0x33, + 39190 - 19968: jis0212<<14 | 0x47<<7 | 0x34, + 39191 - 19968: jis0212<<14 | 0x47<<7 | 0x35, + 39192 - 19968: jis0208<<14 | 0x50<<7 | 0x10, + 39194 - 19968: jis0212<<14 | 0x47<<7 | 0x36, + 39195 - 19968: jis0212<<14 | 0x47<<7 | 0x37, + 39196 - 19968: jis0212<<14 | 0x47<<7 | 0x38, + 39197 - 19968: jis0208<<14 | 0x50<<7 | 0x12, + 39198 - 19968: jis0208<<14 | 0x50<<7 | 0x13, + 39199 - 19968: jis0212<<14 | 0x47<<7 | 0x39, + 39200 - 19968: jis0208<<14 | 0x50<<7 | 0x15, + 39201 - 19968: jis0208<<14 | 0x50<<7 | 0x11, + 39202 - 19968: jis0212<<14 | 0x47<<7 | 0x3A, + 39204 - 19968: jis0208<<14 | 0x50<<7 | 0x14, + 39206 - 19968: jis0212<<14 | 0x47<<7 | 0x3B, + 39207 - 19968: jis0208<<14 | 0x5B<<7 | 0x3D, + 39208 - 19968: jis0208<<14 | 0x13<<7 | 0x3A, + 39211 - 19968: jis0212<<14 | 0x47<<7 | 0x3D, + 39212 - 19968: jis0208<<14 | 0x50<<7 | 0x16, + 39214 - 19968: jis0208<<14 | 0x50<<7 | 0x17, + 39217 - 19968: jis0212<<14 | 0x47<<7 | 0x3E, + 39218 - 19968: jis0212<<14 | 0x47<<7 | 0x3F, + 39219 - 19968: jis0212<<14 | 0x47<<7 | 0x40, + 39220 - 19968: jis0212<<14 | 0x47<<7 | 0x41, + 39221 - 19968: jis0212<<14 | 0x47<<7 | 0x42, + 39225 - 19968: jis0212<<14 | 0x47<<7 | 0x43, + 39226 - 19968: jis0212<<14 | 0x47<<7 | 0x44, + 39227 - 19968: jis0212<<14 | 0x47<<7 | 0x45, + 39228 - 19968: jis0212<<14 | 0x47<<7 | 0x46, + 39229 - 19968: jis0208<<14 | 0x50<<7 | 0x18, + 39230 - 19968: jis0208<<14 | 0x50<<7 | 0x19, + 39232 - 19968: jis0212<<14 | 0x47<<7 | 0x47, + 39233 - 19968: jis0212<<14 | 0x47<<7 | 0x48, + 39234 - 19968: jis0208<<14 | 0x50<<7 | 0x1A, + 39237 - 19968: jis0208<<14 | 0x50<<7 | 0x1C, + 39238 - 19968: jis0212<<14 | 0x47<<7 | 0x49, + 39239 - 19968: jis0212<<14 | 0x47<<7 | 0x4A, + 39240 - 19968: jis0212<<14 | 0x47<<7 | 0x4B, + 39241 - 19968: jis0208<<14 | 0x50<<7 | 0x1B, + 39243 - 19968: jis0208<<14 | 0x50<<7 | 0x1E, + 39244 - 19968: jis0208<<14 | 0x50<<7 | 0x21, + 39245 - 19968: jis0212<<14 | 0x47<<7 | 0x4C, + 39246 - 19968: jis0212<<14 | 0x47<<7 | 0x4D, + 39248 - 19968: jis0208<<14 | 0x50<<7 | 0x1D, + 39249 - 19968: jis0208<<14 | 0x50<<7 | 0x1F, + 39250 - 19968: jis0208<<14 | 0x50<<7 | 0x20, + 39252 - 19968: jis0212<<14 | 0x47<<7 | 0x4E, + 39253 - 19968: jis0208<<14 | 0x50<<7 | 0x22, + 39255 - 19968: jis0208<<14 | 0x15<<7 | 0x21, + 39256 - 19968: jis0212<<14 | 0x47<<7 | 0x4F, + 39257 - 19968: jis0212<<14 | 0x47<<7 | 0x50, + 39259 - 19968: jis0212<<14 | 0x47<<7 | 0x51, + 39260 - 19968: jis0212<<14 | 0x47<<7 | 0x52, + 39262 - 19968: jis0212<<14 | 0x47<<7 | 0x53, + 39263 - 19968: jis0212<<14 | 0x47<<7 | 0x54, + 39264 - 19968: jis0212<<14 | 0x47<<7 | 0x55, + 39318 - 19968: jis0208<<14 | 0x1B<<7 | 0x52, + 39319 - 19968: jis0208<<14 | 0x50<<7 | 0x23, + 39320 - 19968: jis0208<<14 | 0x50<<7 | 0x24, + 39321 - 19968: jis0208<<14 | 0x18<<7 | 0x40, + 39323 - 19968: jis0212<<14 | 0x47<<7 | 0x56, + 39325 - 19968: jis0212<<14 | 0x47<<7 | 0x57, + 39326 - 19968: jis0208<<14 | 0x5B<<7 | 0x3F, + 39327 - 19968: jis0212<<14 | 0x47<<7 | 0x58, + 39333 - 19968: jis0208<<14 | 0x50<<7 | 0x25, + 39334 - 19968: jis0212<<14 | 0x47<<7 | 0x59, + 39336 - 19968: jis0208<<14 | 0x12<<7 | 0x1D, + 39340 - 19968: jis0208<<14 | 0x26<<7 | 0x2E, + 39341 - 19968: jis0208<<14 | 0x50<<7 | 0x26, + 39342 - 19968: jis0208<<14 | 0x50<<7 | 0x27, + 39344 - 19968: jis0212<<14 | 0x47<<7 | 0x5A, + 39345 - 19968: jis0212<<14 | 0x47<<7 | 0x5B, + 39346 - 19968: jis0212<<14 | 0x47<<7 | 0x5C, + 39347 - 19968: jis0208<<14 | 0x22<<7 | 0x39, + 39348 - 19968: jis0208<<14 | 0x25<<7 | 0x4A, + 39349 - 19968: jis0212<<14 | 0x47<<7 | 0x5D, + 39353 - 19968: jis0212<<14 | 0x48<<7 | 0x00, + 39354 - 19968: jis0212<<14 | 0x48<<7 | 0x01, + 39356 - 19968: jis0208<<14 | 0x50<<7 | 0x28, + 39357 - 19968: jis0212<<14 | 0x48<<7 | 0x02, + 39359 - 19968: jis0212<<14 | 0x48<<7 | 0x03, + 39361 - 19968: jis0208<<14 | 0x26<<7 | 0x5C, + 39363 - 19968: jis0212<<14 | 0x48<<7 | 0x04, + 39364 - 19968: jis0208<<14 | 0x21<<7 | 0x2B, + 39365 - 19968: jis0208<<14 | 0x10<<7 | 0x37, + 39366 - 19968: jis0208<<14 | 0x15<<7 | 0x4D, + 39368 - 19968: jis0208<<14 | 0x15<<7 | 0x4E, + 39369 - 19968: jis0212<<14 | 0x48<<7 | 0x05, + 39376 - 19968: jis0208<<14 | 0x22<<7 | 0x52, + 39377 - 19968: jis0208<<14 | 0x50<<7 | 0x2D, + 39378 - 19968: jis0208<<14 | 0x15<<7 | 0x4F, + 39379 - 19968: jis0212<<14 | 0x48<<7 | 0x06, + 39380 - 19968: jis0212<<14 | 0x48<<7 | 0x07, + 39381 - 19968: jis0208<<14 | 0x11<<7 | 0x4E, + 39384 - 19968: jis0208<<14 | 0x50<<7 | 0x2C, + 39385 - 19968: jis0212<<14 | 0x48<<7 | 0x08, + 39386 - 19968: jis0212<<14 | 0x48<<7 | 0x09, + 39387 - 19968: jis0208<<14 | 0x50<<7 | 0x2A, + 39388 - 19968: jis0212<<14 | 0x48<<7 | 0x0A, + 39389 - 19968: jis0208<<14 | 0x50<<7 | 0x2B, + 39390 - 19968: jis0212<<14 | 0x48<<7 | 0x0B, + 39391 - 19968: jis0208<<14 | 0x50<<7 | 0x29, + 39394 - 19968: jis0208<<14 | 0x50<<7 | 0x37, + 39399 - 19968: jis0212<<14 | 0x48<<7 | 0x0C, + 39402 - 19968: jis0212<<14 | 0x48<<7 | 0x0D, + 39403 - 19968: jis0212<<14 | 0x48<<7 | 0x0E, + 39404 - 19968: jis0212<<14 | 0x48<<7 | 0x0F, + 39405 - 19968: jis0208<<14 | 0x50<<7 | 0x2E, + 39406 - 19968: jis0208<<14 | 0x50<<7 | 0x2F, + 39408 - 19968: jis0212<<14 | 0x48<<7 | 0x10, + 39409 - 19968: jis0208<<14 | 0x50<<7 | 0x30, + 39410 - 19968: jis0208<<14 | 0x50<<7 | 0x31, + 39412 - 19968: jis0212<<14 | 0x48<<7 | 0x11, + 39413 - 19968: jis0212<<14 | 0x48<<7 | 0x12, + 39416 - 19968: jis0208<<14 | 0x50<<7 | 0x33, + 39417 - 19968: jis0212<<14 | 0x48<<7 | 0x13, + 39419 - 19968: jis0208<<14 | 0x50<<7 | 0x32, + 39421 - 19968: jis0212<<14 | 0x48<<7 | 0x14, + 39422 - 19968: jis0212<<14 | 0x48<<7 | 0x15, + 39423 - 19968: jis0208<<14 | 0x1C<<7 | 0x38, + 39425 - 19968: jis0208<<14 | 0x50<<7 | 0x34, + 39426 - 19968: jis0212<<14 | 0x48<<7 | 0x16, + 39427 - 19968: jis0212<<14 | 0x48<<7 | 0x17, + 39428 - 19968: jis0212<<14 | 0x48<<7 | 0x18, + 39429 - 19968: jis0208<<14 | 0x50<<7 | 0x36, + 39435 - 19968: jis0212<<14 | 0x48<<7 | 0x19, + 39436 - 19968: jis0212<<14 | 0x48<<7 | 0x1A, + 39438 - 19968: jis0208<<14 | 0x14<<7 | 0x12, + 39439 - 19968: jis0208<<14 | 0x50<<7 | 0x35, + 39440 - 19968: jis0212<<14 | 0x48<<7 | 0x1B, + 39441 - 19968: jis0212<<14 | 0x48<<7 | 0x1C, + 39442 - 19968: jis0208<<14 | 0x20<<7 | 0x5A, + 39443 - 19968: jis0208<<14 | 0x17<<7 | 0x12, + 39446 - 19968: jis0212<<14 | 0x48<<7 | 0x1D, + 39449 - 19968: jis0208<<14 | 0x50<<7 | 0x38, + 39454 - 19968: jis0212<<14 | 0x48<<7 | 0x1E, + 39456 - 19968: jis0212<<14 | 0x48<<7 | 0x1F, + 39458 - 19968: jis0212<<14 | 0x48<<7 | 0x20, + 39459 - 19968: jis0212<<14 | 0x48<<7 | 0x21, + 39460 - 19968: jis0212<<14 | 0x48<<7 | 0x22, + 39463 - 19968: jis0212<<14 | 0x48<<7 | 0x23, + 39464 - 19968: jis0208<<14 | 0x21<<7 | 0x2C, + 39467 - 19968: jis0208<<14 | 0x50<<7 | 0x39, + 39469 - 19968: jis0212<<14 | 0x48<<7 | 0x24, + 39470 - 19968: jis0212<<14 | 0x48<<7 | 0x25, + 39472 - 19968: jis0208<<14 | 0x25<<7 | 0x0C, + 39475 - 19968: jis0212<<14 | 0x48<<7 | 0x26, + 39477 - 19968: jis0212<<14 | 0x48<<7 | 0x27, + 39478 - 19968: jis0212<<14 | 0x48<<7 | 0x28, + 39479 - 19968: jis0208<<14 | 0x50<<7 | 0x3A, + 39480 - 19968: jis0212<<14 | 0x48<<7 | 0x29, + 39486 - 19968: jis0208<<14 | 0x50<<7 | 0x3F, + 39488 - 19968: jis0208<<14 | 0x50<<7 | 0x3D, + 39489 - 19968: jis0212<<14 | 0x48<<7 | 0x2B, + 39490 - 19968: jis0208<<14 | 0x50<<7 | 0x3C, + 39491 - 19968: jis0208<<14 | 0x50<<7 | 0x3E, + 39492 - 19968: jis0212<<14 | 0x48<<7 | 0x2C, + 39493 - 19968: jis0208<<14 | 0x50<<7 | 0x3B, + 39495 - 19968: jis0212<<14 | 0x48<<7 | 0x2A, + 39498 - 19968: jis0212<<14 | 0x48<<7 | 0x2D, + 39499 - 19968: jis0212<<14 | 0x48<<7 | 0x2E, + 39500 - 19968: jis0212<<14 | 0x48<<7 | 0x2F, + 39501 - 19968: jis0208<<14 | 0x50<<7 | 0x41, + 39502 - 19968: jis0208<<14 | 0x5B<<7 | 0x40, + 39505 - 19968: jis0212<<14 | 0x48<<7 | 0x31, + 39508 - 19968: jis0212<<14 | 0x48<<7 | 0x32, + 39509 - 19968: jis0208<<14 | 0x50<<7 | 0x40, + 39510 - 19968: jis0212<<14 | 0x48<<7 | 0x33, + 39511 - 19968: jis0208<<14 | 0x50<<7 | 0x43, + 39514 - 19968: jis0208<<14 | 0x15<<7 | 0x22, + 39515 - 19968: jis0208<<14 | 0x50<<7 | 0x42, + 39517 - 19968: jis0212<<14 | 0x48<<7 | 0x34, + 39519 - 19968: jis0208<<14 | 0x50<<7 | 0x44, + 39522 - 19968: jis0208<<14 | 0x50<<7 | 0x45, + 39524 - 19968: jis0208<<14 | 0x50<<7 | 0x47, + 39525 - 19968: jis0208<<14 | 0x50<<7 | 0x46, + 39529 - 19968: jis0208<<14 | 0x50<<7 | 0x48, + 39530 - 19968: jis0208<<14 | 0x50<<7 | 0x4A, + 39531 - 19968: jis0208<<14 | 0x50<<7 | 0x49, + 39592 - 19968: jis0208<<14 | 0x18<<7 | 0x5B, + 39594 - 19968: jis0212<<14 | 0x48<<7 | 0x35, + 39596 - 19968: jis0212<<14 | 0x48<<7 | 0x36, + 39597 - 19968: jis0208<<14 | 0x50<<7 | 0x4B, + 39598 - 19968: jis0212<<14 | 0x48<<7 | 0x37, + 39599 - 19968: jis0212<<14 | 0x48<<7 | 0x38, + 39600 - 19968: jis0208<<14 | 0x50<<7 | 0x4C, + 39602 - 19968: jis0212<<14 | 0x48<<7 | 0x39, + 39604 - 19968: jis0212<<14 | 0x48<<7 | 0x3A, + 39605 - 19968: jis0212<<14 | 0x48<<7 | 0x3B, + 39606 - 19968: jis0212<<14 | 0x48<<7 | 0x3C, + 39608 - 19968: jis0208<<14 | 0x12<<7 | 0x1B, + 39609 - 19968: jis0212<<14 | 0x48<<7 | 0x3D, + 39611 - 19968: jis0212<<14 | 0x48<<7 | 0x3E, + 39612 - 19968: jis0208<<14 | 0x50<<7 | 0x4D, + 39614 - 19968: jis0212<<14 | 0x48<<7 | 0x3F, + 39615 - 19968: jis0212<<14 | 0x48<<7 | 0x40, + 39616 - 19968: jis0208<<14 | 0x50<<7 | 0x4E, + 39617 - 19968: jis0212<<14 | 0x48<<7 | 0x41, + 39619 - 19968: jis0212<<14 | 0x48<<7 | 0x42, + 39620 - 19968: jis0208<<14 | 0x1E<<7 | 0x50, + 39622 - 19968: jis0212<<14 | 0x48<<7 | 0x43, + 39624 - 19968: jis0212<<14 | 0x48<<7 | 0x44, + 39630 - 19968: jis0212<<14 | 0x48<<7 | 0x45, + 39631 - 19968: jis0208<<14 | 0x50<<7 | 0x4F, + 39632 - 19968: jis0212<<14 | 0x48<<7 | 0x46, + 39633 - 19968: jis0208<<14 | 0x50<<7 | 0x50, + 39634 - 19968: jis0212<<14 | 0x48<<7 | 0x47, + 39635 - 19968: jis0208<<14 | 0x50<<7 | 0x51, + 39636 - 19968: jis0208<<14 | 0x50<<7 | 0x52, + 39637 - 19968: jis0212<<14 | 0x48<<7 | 0x48, + 39638 - 19968: jis0212<<14 | 0x48<<7 | 0x49, + 39639 - 19968: jis0212<<14 | 0x48<<7 | 0x4A, + 39640 - 19968: jis0208<<14 | 0x18<<7 | 0x41, + 39641 - 19968: jis0208<<14 | 0x5B<<7 | 0x41, + 39643 - 19968: jis0212<<14 | 0x48<<7 | 0x4B, + 39644 - 19968: jis0208<<14 | 0x5B<<7 | 0x42, + 39646 - 19968: jis0208<<14 | 0x50<<7 | 0x53, + 39647 - 19968: jis0208<<14 | 0x50<<7 | 0x54, + 39648 - 19968: jis0212<<14 | 0x48<<7 | 0x4D, + 39650 - 19968: jis0208<<14 | 0x50<<7 | 0x55, + 39651 - 19968: jis0208<<14 | 0x50<<7 | 0x56, + 39652 - 19968: jis0212<<14 | 0x48<<7 | 0x4E, + 39653 - 19968: jis0212<<14 | 0x48<<7 | 0x4F, + 39654 - 19968: jis0208<<14 | 0x50<<7 | 0x57, + 39655 - 19968: jis0212<<14 | 0x48<<7 | 0x50, + 39657 - 19968: jis0212<<14 | 0x48<<7 | 0x51, + 39658 - 19968: jis0208<<14 | 0x27<<7 | 0x10, + 39659 - 19968: jis0208<<14 | 0x50<<7 | 0x59, + 39660 - 19968: jis0212<<14 | 0x48<<7 | 0x52, + 39661 - 19968: jis0208<<14 | 0x28<<7 | 0x05, + 39662 - 19968: jis0208<<14 | 0x50<<7 | 0x5A, + 39663 - 19968: jis0208<<14 | 0x50<<7 | 0x58, + 39665 - 19968: jis0208<<14 | 0x50<<7 | 0x5C, + 39666 - 19968: jis0212<<14 | 0x48<<7 | 0x53, + 39667 - 19968: jis0212<<14 | 0x48<<7 | 0x54, + 39668 - 19968: jis0208<<14 | 0x50<<7 | 0x5B, + 39669 - 19968: jis0212<<14 | 0x48<<7 | 0x55, + 39671 - 19968: jis0208<<14 | 0x50<<7 | 0x5D, + 39673 - 19968: jis0212<<14 | 0x48<<7 | 0x56, + 39674 - 19968: jis0212<<14 | 0x48<<7 | 0x57, + 39675 - 19968: jis0208<<14 | 0x51<<7 | 0x00, + 39677 - 19968: jis0212<<14 | 0x48<<7 | 0x58, + 39679 - 19968: jis0212<<14 | 0x48<<7 | 0x59, + 39680 - 19968: jis0212<<14 | 0x48<<7 | 0x5A, + 39681 - 19968: jis0212<<14 | 0x48<<7 | 0x5B, + 39682 - 19968: jis0212<<14 | 0x48<<7 | 0x5C, + 39683 - 19968: jis0212<<14 | 0x48<<7 | 0x5D, + 39684 - 19968: jis0212<<14 | 0x49<<7 | 0x00, + 39685 - 19968: jis0212<<14 | 0x49<<7 | 0x01, + 39686 - 19968: jis0208<<14 | 0x51<<7 | 0x01, + 39688 - 19968: jis0212<<14 | 0x49<<7 | 0x02, + 39689 - 19968: jis0212<<14 | 0x49<<7 | 0x03, + 39691 - 19968: jis0212<<14 | 0x49<<7 | 0x04, + 39692 - 19968: jis0212<<14 | 0x49<<7 | 0x05, + 39693 - 19968: jis0212<<14 | 0x49<<7 | 0x06, + 39694 - 19968: jis0212<<14 | 0x49<<7 | 0x07, + 39696 - 19968: jis0212<<14 | 0x49<<7 | 0x08, + 39698 - 19968: jis0212<<14 | 0x49<<7 | 0x09, + 39702 - 19968: jis0212<<14 | 0x49<<7 | 0x0A, + 39704 - 19968: jis0208<<14 | 0x51<<7 | 0x02, + 39705 - 19968: jis0212<<14 | 0x49<<7 | 0x0B, + 39706 - 19968: jis0208<<14 | 0x51<<7 | 0x03, + 39707 - 19968: jis0212<<14 | 0x49<<7 | 0x0C, + 39708 - 19968: jis0212<<14 | 0x49<<7 | 0x0D, + 39711 - 19968: jis0208<<14 | 0x51<<7 | 0x04, + 39712 - 19968: jis0212<<14 | 0x49<<7 | 0x0E, + 39714 - 19968: jis0208<<14 | 0x51<<7 | 0x05, + 39715 - 19968: jis0208<<14 | 0x51<<7 | 0x06, + 39717 - 19968: jis0208<<14 | 0x51<<7 | 0x07, + 39718 - 19968: jis0212<<14 | 0x49<<7 | 0x0F, + 39719 - 19968: jis0208<<14 | 0x51<<7 | 0x08, + 39720 - 19968: jis0208<<14 | 0x51<<7 | 0x09, + 39721 - 19968: jis0208<<14 | 0x51<<7 | 0x0A, + 39722 - 19968: jis0208<<14 | 0x51<<7 | 0x0B, + 39723 - 19968: jis0212<<14 | 0x49<<7 | 0x10, + 39725 - 19968: jis0212<<14 | 0x49<<7 | 0x11, + 39726 - 19968: jis0208<<14 | 0x51<<7 | 0x0C, + 39727 - 19968: jis0208<<14 | 0x51<<7 | 0x0D, + 39729 - 19968: jis0208<<14 | 0x3C<<7 | 0x14, + 39730 - 19968: jis0208<<14 | 0x51<<7 | 0x0E, + 39731 - 19968: jis0212<<14 | 0x49<<7 | 0x12, + 39732 - 19968: jis0212<<14 | 0x49<<7 | 0x13, + 39733 - 19968: jis0212<<14 | 0x49<<7 | 0x14, + 39735 - 19968: jis0212<<14 | 0x49<<7 | 0x15, + 39737 - 19968: jis0212<<14 | 0x49<<7 | 0x16, + 39738 - 19968: jis0212<<14 | 0x49<<7 | 0x17, + 39739 - 19968: jis0208<<14 | 0x43<<7 | 0x57, + 39740 - 19968: jis0208<<14 | 0x14<<7 | 0x13, + 39741 - 19968: jis0212<<14 | 0x49<<7 | 0x18, + 39745 - 19968: jis0208<<14 | 0x12<<7 | 0x00, + 39746 - 19968: jis0208<<14 | 0x19<<7 | 0x11, + 39747 - 19968: jis0208<<14 | 0x51<<7 | 0x10, + 39748 - 19968: jis0208<<14 | 0x51<<7 | 0x0F, + 39749 - 19968: jis0208<<14 | 0x2B<<7 | 0x04, + 39752 - 19968: jis0212<<14 | 0x49<<7 | 0x19, + 39755 - 19968: jis0212<<14 | 0x49<<7 | 0x1A, + 39756 - 19968: jis0212<<14 | 0x49<<7 | 0x1B, + 39757 - 19968: jis0208<<14 | 0x51<<7 | 0x12, + 39758 - 19968: jis0208<<14 | 0x51<<7 | 0x13, + 39759 - 19968: jis0208<<14 | 0x51<<7 | 0x11, + 39761 - 19968: jis0208<<14 | 0x51<<7 | 0x14, + 39764 - 19968: jis0208<<14 | 0x2A<<7 | 0x41, + 39765 - 19968: jis0212<<14 | 0x49<<7 | 0x1C, + 39766 - 19968: jis0212<<14 | 0x49<<7 | 0x1D, + 39767 - 19968: jis0212<<14 | 0x49<<7 | 0x1E, + 39768 - 19968: jis0208<<14 | 0x51<<7 | 0x15, + 39770 - 19968: jis0208<<14 | 0x14<<7 | 0x5A, + 39771 - 19968: jis0212<<14 | 0x49<<7 | 0x1F, + 39774 - 19968: jis0212<<14 | 0x49<<7 | 0x20, + 39777 - 19968: jis0212<<14 | 0x49<<7 | 0x21, + 39779 - 19968: jis0212<<14 | 0x49<<7 | 0x22, + 39781 - 19968: jis0212<<14 | 0x49<<7 | 0x23, + 39782 - 19968: jis0212<<14 | 0x49<<7 | 0x24, + 39784 - 19968: jis0212<<14 | 0x49<<7 | 0x25, + 39786 - 19968: jis0212<<14 | 0x49<<7 | 0x26, + 39787 - 19968: jis0212<<14 | 0x49<<7 | 0x27, + 39788 - 19968: jis0212<<14 | 0x49<<7 | 0x28, + 39789 - 19968: jis0212<<14 | 0x49<<7 | 0x29, + 39790 - 19968: jis0212<<14 | 0x49<<7 | 0x2A, + 39791 - 19968: jis0208<<14 | 0x2E<<7 | 0x04, + 39794 - 19968: jis0208<<14 | 0x5B<<7 | 0x44, + 39795 - 19968: jis0212<<14 | 0x49<<7 | 0x2B, + 39796 - 19968: jis0208<<14 | 0x51<<7 | 0x16, + 39797 - 19968: jis0208<<14 | 0x5B<<7 | 0x43, + 39799 - 19968: jis0212<<14 | 0x49<<7 | 0x2D, + 39800 - 19968: jis0212<<14 | 0x49<<7 | 0x2E, + 39801 - 19968: jis0212<<14 | 0x49<<7 | 0x2F, + 39807 - 19968: jis0212<<14 | 0x49<<7 | 0x30, + 39808 - 19968: jis0212<<14 | 0x49<<7 | 0x31, + 39811 - 19968: jis0208<<14 | 0x51<<7 | 0x18, + 39812 - 19968: jis0212<<14 | 0x49<<7 | 0x32, + 39813 - 19968: jis0212<<14 | 0x49<<7 | 0x33, + 39814 - 19968: jis0212<<14 | 0x49<<7 | 0x34, + 39815 - 19968: jis0212<<14 | 0x49<<7 | 0x35, + 39817 - 19968: jis0212<<14 | 0x49<<7 | 0x36, + 39818 - 19968: jis0212<<14 | 0x49<<7 | 0x37, + 39819 - 19968: jis0212<<14 | 0x49<<7 | 0x38, + 39821 - 19968: jis0212<<14 | 0x49<<7 | 0x39, + 39822 - 19968: jis0208<<14 | 0x0F<<7 | 0x1D, + 39823 - 19968: jis0208<<14 | 0x5B<<7 | 0x45, + 39824 - 19968: jis0212<<14 | 0x49<<7 | 0x3B, + 39825 - 19968: jis0208<<14 | 0x51<<7 | 0x19, + 39826 - 19968: jis0208<<14 | 0x29<<7 | 0x0A, + 39827 - 19968: jis0208<<14 | 0x51<<7 | 0x17, + 39828 - 19968: jis0212<<14 | 0x49<<7 | 0x3C, + 39830 - 19968: jis0208<<14 | 0x51<<7 | 0x1A, + 39831 - 19968: jis0208<<14 | 0x51<<7 | 0x1B, + 39834 - 19968: jis0212<<14 | 0x49<<7 | 0x3D, + 39837 - 19968: jis0212<<14 | 0x49<<7 | 0x3E, + 39838 - 19968: jis0212<<14 | 0x49<<7 | 0x3F, + 39839 - 19968: jis0208<<14 | 0x51<<7 | 0x1C, + 39840 - 19968: jis0208<<14 | 0x51<<7 | 0x1D, + 39846 - 19968: jis0212<<14 | 0x49<<7 | 0x40, + 39847 - 19968: jis0212<<14 | 0x49<<7 | 0x41, + 39848 - 19968: jis0208<<14 | 0x51<<7 | 0x1E, + 39849 - 19968: jis0212<<14 | 0x49<<7 | 0x42, + 39850 - 19968: jis0208<<14 | 0x2A<<7 | 0x4D, + 39851 - 19968: jis0208<<14 | 0x1A<<7 | 0x0C, + 39852 - 19968: jis0212<<14 | 0x49<<7 | 0x43, + 39853 - 19968: jis0208<<14 | 0x19<<7 | 0x59, + 39854 - 19968: jis0208<<14 | 0x20<<7 | 0x0E, + 39856 - 19968: jis0212<<14 | 0x49<<7 | 0x44, + 39857 - 19968: jis0208<<14 | 0x5B<<7 | 0x46, + 39858 - 19968: jis0212<<14 | 0x49<<7 | 0x46, + 39860 - 19968: jis0208<<14 | 0x51<<7 | 0x1F, + 39863 - 19968: jis0212<<14 | 0x49<<7 | 0x47, + 39864 - 19968: jis0212<<14 | 0x49<<7 | 0x48, + 39865 - 19968: jis0208<<14 | 0x51<<7 | 0x22, + 39867 - 19968: jis0208<<14 | 0x5B<<7 | 0x47, + 39868 - 19968: jis0212<<14 | 0x49<<7 | 0x4A, + 39870 - 19968: jis0212<<14 | 0x49<<7 | 0x4B, + 39871 - 19968: jis0212<<14 | 0x49<<7 | 0x4C, + 39872 - 19968: jis0208<<14 | 0x51<<7 | 0x20, + 39873 - 19968: jis0212<<14 | 0x49<<7 | 0x4D, + 39878 - 19968: jis0208<<14 | 0x51<<7 | 0x23, + 39879 - 19968: jis0212<<14 | 0x49<<7 | 0x4E, + 39880 - 19968: jis0212<<14 | 0x49<<7 | 0x4F, + 39881 - 19968: jis0208<<14 | 0x17<<7 | 0x50, + 39882 - 19968: jis0208<<14 | 0x51<<7 | 0x21, + 39886 - 19968: jis0212<<14 | 0x49<<7 | 0x50, + 39887 - 19968: jis0208<<14 | 0x51<<7 | 0x24, + 39888 - 19968: jis0212<<14 | 0x49<<7 | 0x51, + 39889 - 19968: jis0208<<14 | 0x51<<7 | 0x25, + 39890 - 19968: jis0208<<14 | 0x51<<7 | 0x26, + 39892 - 19968: jis0208<<14 | 0x51<<7 | 0x2A, + 39894 - 19968: jis0208<<14 | 0x1A<<7 | 0x09, + 39895 - 19968: jis0212<<14 | 0x49<<7 | 0x52, + 39896 - 19968: jis0212<<14 | 0x49<<7 | 0x53, + 39899 - 19968: jis0208<<14 | 0x21<<7 | 0x43, + 39901 - 19968: jis0212<<14 | 0x49<<7 | 0x54, + 39903 - 19968: jis0212<<14 | 0x49<<7 | 0x55, + 39905 - 19968: jis0208<<14 | 0x51<<7 | 0x2B, + 39906 - 19968: jis0208<<14 | 0x51<<7 | 0x28, + 39907 - 19968: jis0208<<14 | 0x51<<7 | 0x27, + 39908 - 19968: jis0208<<14 | 0x51<<7 | 0x29, + 39909 - 19968: jis0212<<14 | 0x49<<7 | 0x56, + 39911 - 19968: jis0212<<14 | 0x49<<7 | 0x57, + 39912 - 19968: jis0208<<14 | 0x16<<7 | 0x3E, + 39914 - 19968: jis0212<<14 | 0x49<<7 | 0x58, + 39915 - 19968: jis0212<<14 | 0x49<<7 | 0x59, + 39919 - 19968: jis0212<<14 | 0x49<<7 | 0x5A, + 39920 - 19968: jis0208<<14 | 0x51<<7 | 0x2F, + 39921 - 19968: jis0208<<14 | 0x51<<7 | 0x2E, + 39922 - 19968: jis0208<<14 | 0x51<<7 | 0x2D, + 39923 - 19968: jis0212<<14 | 0x49<<7 | 0x5B, + 39925 - 19968: jis0208<<14 | 0x0F<<7 | 0x12, + 39927 - 19968: jis0212<<14 | 0x49<<7 | 0x5C, + 39928 - 19968: jis0212<<14 | 0x49<<7 | 0x5D, + 39929 - 19968: jis0212<<14 | 0x4A<<7 | 0x00, + 39930 - 19968: jis0212<<14 | 0x4A<<7 | 0x01, + 39933 - 19968: jis0212<<14 | 0x4A<<7 | 0x02, + 39935 - 19968: jis0212<<14 | 0x4A<<7 | 0x03, + 39936 - 19968: jis0208<<14 | 0x5B<<7 | 0x48, + 39938 - 19968: jis0212<<14 | 0x4A<<7 | 0x05, + 39940 - 19968: jis0208<<14 | 0x51<<7 | 0x39, + 39942 - 19968: jis0208<<14 | 0x51<<7 | 0x35, + 39944 - 19968: jis0208<<14 | 0x51<<7 | 0x36, + 39945 - 19968: jis0208<<14 | 0x51<<7 | 0x32, + 39946 - 19968: jis0208<<14 | 0x51<<7 | 0x38, + 39947 - 19968: jis0212<<14 | 0x4A<<7 | 0x06, + 39948 - 19968: jis0208<<14 | 0x51<<7 | 0x34, + 39949 - 19968: jis0208<<14 | 0x12<<7 | 0x41, + 39951 - 19968: jis0212<<14 | 0x4A<<7 | 0x07, + 39952 - 19968: jis0208<<14 | 0x2E<<7 | 0x2B, + 39953 - 19968: jis0212<<14 | 0x4A<<7 | 0x08, + 39954 - 19968: jis0208<<14 | 0x51<<7 | 0x37, + 39955 - 19968: jis0208<<14 | 0x51<<7 | 0x33, + 39956 - 19968: jis0208<<14 | 0x51<<7 | 0x31, + 39957 - 19968: jis0208<<14 | 0x51<<7 | 0x30, + 39958 - 19968: jis0212<<14 | 0x4A<<7 | 0x09, + 39960 - 19968: jis0212<<14 | 0x4A<<7 | 0x0A, + 39961 - 19968: jis0212<<14 | 0x4A<<7 | 0x0B, + 39962 - 19968: jis0212<<14 | 0x4A<<7 | 0x0C, + 39963 - 19968: jis0208<<14 | 0x51<<7 | 0x3B, + 39964 - 19968: jis0212<<14 | 0x4A<<7 | 0x0D, + 39966 - 19968: jis0212<<14 | 0x4A<<7 | 0x0E, + 39969 - 19968: jis0208<<14 | 0x51<<7 | 0x3E, + 39970 - 19968: jis0212<<14 | 0x4A<<7 | 0x0F, + 39971 - 19968: jis0212<<14 | 0x4A<<7 | 0x10, + 39972 - 19968: jis0208<<14 | 0x51<<7 | 0x3D, + 39973 - 19968: jis0208<<14 | 0x51<<7 | 0x3C, + 39974 - 19968: jis0212<<14 | 0x4A<<7 | 0x11, + 39975 - 19968: jis0212<<14 | 0x4A<<7 | 0x12, + 39976 - 19968: jis0212<<14 | 0x4A<<7 | 0x13, + 39977 - 19968: jis0212<<14 | 0x4A<<7 | 0x14, + 39978 - 19968: jis0212<<14 | 0x4A<<7 | 0x15, + 39981 - 19968: jis0208<<14 | 0x28<<7 | 0x28, + 39982 - 19968: jis0208<<14 | 0x51<<7 | 0x3A, + 39983 - 19968: jis0208<<14 | 0x0F<<7 | 0x52, + 39984 - 19968: jis0208<<14 | 0x51<<7 | 0x3F, + 39985 - 19968: jis0212<<14 | 0x4A<<7 | 0x16, + 39986 - 19968: jis0208<<14 | 0x51<<7 | 0x41, + 39989 - 19968: jis0212<<14 | 0x4A<<7 | 0x17, + 39990 - 19968: jis0212<<14 | 0x4A<<7 | 0x18, + 39991 - 19968: jis0212<<14 | 0x4A<<7 | 0x19, + 39993 - 19968: jis0208<<14 | 0x12<<7 | 0x4E, + 39994 - 19968: jis0208<<14 | 0x51<<7 | 0x2C, + 39995 - 19968: jis0208<<14 | 0x10<<7 | 0x16, + 39997 - 19968: jis0212<<14 | 0x4A<<7 | 0x1A, + 39998 - 19968: jis0208<<14 | 0x51<<7 | 0x43, + 40001 - 19968: jis0212<<14 | 0x4A<<7 | 0x1B, + 40003 - 19968: jis0212<<14 | 0x4A<<7 | 0x1C, + 40004 - 19968: jis0212<<14 | 0x4A<<7 | 0x1D, + 40005 - 19968: jis0212<<14 | 0x4A<<7 | 0x1E, + 40006 - 19968: jis0208<<14 | 0x51<<7 | 0x42, + 40007 - 19968: jis0208<<14 | 0x51<<7 | 0x40, + 40008 - 19968: jis0208<<14 | 0x22<<7 | 0x0C, + 40009 - 19968: jis0212<<14 | 0x4A<<7 | 0x1F, + 40010 - 19968: jis0212<<14 | 0x4A<<7 | 0x20, + 40014 - 19968: jis0212<<14 | 0x4A<<7 | 0x21, + 40015 - 19968: jis0212<<14 | 0x4A<<7 | 0x22, + 40016 - 19968: jis0212<<14 | 0x4A<<7 | 0x23, + 40018 - 19968: jis0208<<14 | 0x2A<<7 | 0x4F, + 40019 - 19968: jis0212<<14 | 0x4A<<7 | 0x24, + 40020 - 19968: jis0212<<14 | 0x4A<<7 | 0x25, + 40022 - 19968: jis0212<<14 | 0x4A<<7 | 0x26, + 40023 - 19968: jis0208<<14 | 0x2D<<7 | 0x39, + 40024 - 19968: jis0212<<14 | 0x4A<<7 | 0x27, + 40026 - 19968: jis0208<<14 | 0x51<<7 | 0x44, + 40027 - 19968: jis0212<<14 | 0x4A<<7 | 0x28, + 40028 - 19968: jis0212<<14 | 0x4A<<7 | 0x2F, + 40029 - 19968: jis0212<<14 | 0x4A<<7 | 0x29, + 40030 - 19968: jis0212<<14 | 0x4A<<7 | 0x2A, + 40031 - 19968: jis0212<<14 | 0x4A<<7 | 0x2B, + 40032 - 19968: jis0208<<14 | 0x51<<7 | 0x45, + 40035 - 19968: jis0212<<14 | 0x4A<<7 | 0x2C, + 40039 - 19968: jis0208<<14 | 0x51<<7 | 0x46, + 40040 - 19968: jis0212<<14 | 0x4A<<7 | 0x31, + 40041 - 19968: jis0212<<14 | 0x4A<<7 | 0x2D, + 40042 - 19968: jis0212<<14 | 0x4A<<7 | 0x2E, + 40043 - 19968: jis0212<<14 | 0x4A<<7 | 0x30, + 40046 - 19968: jis0212<<14 | 0x4A<<7 | 0x32, + 40048 - 19968: jis0212<<14 | 0x4A<<7 | 0x33, + 40050 - 19968: jis0212<<14 | 0x4A<<7 | 0x34, + 40053 - 19968: jis0212<<14 | 0x4A<<7 | 0x35, + 40054 - 19968: jis0208<<14 | 0x51<<7 | 0x47, + 40055 - 19968: jis0212<<14 | 0x4A<<7 | 0x36, + 40056 - 19968: jis0208<<14 | 0x51<<7 | 0x48, + 40059 - 19968: jis0212<<14 | 0x4A<<7 | 0x37, + 40165 - 19968: jis0208<<14 | 0x23<<7 | 0x1A, + 40166 - 19968: jis0212<<14 | 0x4A<<7 | 0x38, + 40167 - 19968: jis0208<<14 | 0x51<<7 | 0x49, + 40169 - 19968: jis0208<<14 | 0x27<<7 | 0x16, + 40171 - 19968: jis0208<<14 | 0x51<<7 | 0x4E, + 40172 - 19968: jis0208<<14 | 0x51<<7 | 0x4A, + 40176 - 19968: jis0208<<14 | 0x51<<7 | 0x4B, + 40178 - 19968: jis0212<<14 | 0x4A<<7 | 0x39, + 40179 - 19968: jis0208<<14 | 0x2A<<7 | 0x10, + 40180 - 19968: jis0208<<14 | 0x2B<<7 | 0x23, + 40182 - 19968: jis0208<<14 | 0x25<<7 | 0x2F, + 40183 - 19968: jis0212<<14 | 0x4A<<7 | 0x3A, + 40185 - 19968: jis0212<<14 | 0x4A<<7 | 0x3B, + 40194 - 19968: jis0212<<14 | 0x4A<<7 | 0x3D, + 40195 - 19968: jis0208<<14 | 0x51<<7 | 0x4F, + 40198 - 19968: jis0208<<14 | 0x51<<7 | 0x50, + 40199 - 19968: jis0208<<14 | 0x25<<7 | 0x1D, + 40200 - 19968: jis0208<<14 | 0x51<<7 | 0x4D, + 40201 - 19968: jis0208<<14 | 0x51<<7 | 0x4C, + 40203 - 19968: jis0212<<14 | 0x4A<<7 | 0x3C, + 40206 - 19968: jis0208<<14 | 0x11<<7 | 0x09, + 40209 - 19968: jis0212<<14 | 0x4A<<7 | 0x3E, + 40210 - 19968: jis0208<<14 | 0x51<<7 | 0x58, + 40213 - 19968: jis0208<<14 | 0x51<<7 | 0x57, + 40215 - 19968: jis0212<<14 | 0x4A<<7 | 0x3F, + 40216 - 19968: jis0212<<14 | 0x4A<<7 | 0x40, + 40219 - 19968: jis0208<<14 | 0x10<<7 | 0x54, + 40220 - 19968: jis0212<<14 | 0x4A<<7 | 0x41, + 40221 - 19968: jis0212<<14 | 0x4A<<7 | 0x42, + 40222 - 19968: jis0212<<14 | 0x4A<<7 | 0x43, + 40223 - 19968: jis0208<<14 | 0x51<<7 | 0x55, + 40227 - 19968: jis0208<<14 | 0x51<<7 | 0x54, + 40230 - 19968: jis0208<<14 | 0x51<<7 | 0x52, + 40232 - 19968: jis0208<<14 | 0x12<<7 | 0x5A, + 40234 - 19968: jis0208<<14 | 0x51<<7 | 0x51, + 40235 - 19968: jis0208<<14 | 0x1B<<7 | 0x11, + 40236 - 19968: jis0208<<14 | 0x11<<7 | 0x08, + 40239 - 19968: jis0212<<14 | 0x4A<<7 | 0x44, + 40240 - 19968: jis0212<<14 | 0x4A<<7 | 0x45, + 40242 - 19968: jis0212<<14 | 0x4A<<7 | 0x46, + 40243 - 19968: jis0212<<14 | 0x4A<<7 | 0x47, + 40244 - 19968: jis0212<<14 | 0x4A<<7 | 0x48, + 40250 - 19968: jis0212<<14 | 0x4A<<7 | 0x49, + 40251 - 19968: jis0208<<14 | 0x18<<7 | 0x42, + 40252 - 19968: jis0212<<14 | 0x4A<<7 | 0x4A, + 40253 - 19968: jis0212<<14 | 0x4A<<7 | 0x4C, + 40254 - 19968: jis0208<<14 | 0x51<<7 | 0x5B, + 40255 - 19968: jis0208<<14 | 0x51<<7 | 0x5A, + 40257 - 19968: jis0208<<14 | 0x51<<7 | 0x59, + 40258 - 19968: jis0212<<14 | 0x4A<<7 | 0x4D, + 40259 - 19968: jis0212<<14 | 0x4A<<7 | 0x4E, + 40260 - 19968: jis0208<<14 | 0x51<<7 | 0x56, + 40261 - 19968: jis0212<<14 | 0x4A<<7 | 0x4B, + 40262 - 19968: jis0208<<14 | 0x51<<7 | 0x5C, + 40263 - 19968: jis0212<<14 | 0x4A<<7 | 0x4F, + 40264 - 19968: jis0208<<14 | 0x51<<7 | 0x5D, + 40266 - 19968: jis0212<<14 | 0x4A<<7 | 0x50, + 40272 - 19968: jis0208<<14 | 0x52<<7 | 0x04, + 40273 - 19968: jis0208<<14 | 0x52<<7 | 0x03, + 40275 - 19968: jis0212<<14 | 0x4A<<7 | 0x51, + 40276 - 19968: jis0212<<14 | 0x4A<<7 | 0x52, + 40281 - 19968: jis0208<<14 | 0x52<<7 | 0x05, + 40284 - 19968: jis0208<<14 | 0x10<<7 | 0x0C, + 40285 - 19968: jis0208<<14 | 0x52<<7 | 0x00, + 40286 - 19968: jis0208<<14 | 0x52<<7 | 0x01, + 40287 - 19968: jis0212<<14 | 0x4A<<7 | 0x53, + 40288 - 19968: jis0208<<14 | 0x18<<7 | 0x53, + 40289 - 19968: jis0208<<14 | 0x2B<<7 | 0x18, + 40290 - 19968: jis0212<<14 | 0x4A<<7 | 0x55, + 40291 - 19968: jis0212<<14 | 0x4A<<7 | 0x54, + 40292 - 19968: jis0208<<14 | 0x52<<7 | 0x02, + 40293 - 19968: jis0212<<14 | 0x4A<<7 | 0x56, + 40297 - 19968: jis0212<<14 | 0x4A<<7 | 0x57, + 40298 - 19968: jis0212<<14 | 0x4A<<7 | 0x58, + 40299 - 19968: jis0208<<14 | 0x5B<<7 | 0x4A, + 40300 - 19968: jis0208<<14 | 0x2A<<7 | 0x11, + 40303 - 19968: jis0208<<14 | 0x52<<7 | 0x0A, + 40304 - 19968: jis0208<<14 | 0x5B<<7 | 0x49, + 40306 - 19968: jis0208<<14 | 0x52<<7 | 0x06, + 40310 - 19968: jis0212<<14 | 0x4A<<7 | 0x5B, + 40311 - 19968: jis0212<<14 | 0x4A<<7 | 0x5C, + 40314 - 19968: jis0208<<14 | 0x52<<7 | 0x0B, + 40315 - 19968: jis0212<<14 | 0x4A<<7 | 0x5D, + 40316 - 19968: jis0212<<14 | 0x4B<<7 | 0x00, + 40318 - 19968: jis0212<<14 | 0x4B<<7 | 0x01, + 40323 - 19968: jis0212<<14 | 0x4B<<7 | 0x02, + 40324 - 19968: jis0212<<14 | 0x4B<<7 | 0x03, + 40326 - 19968: jis0212<<14 | 0x4B<<7 | 0x04, + 40327 - 19968: jis0208<<14 | 0x52<<7 | 0x08, + 40329 - 19968: jis0208<<14 | 0x52<<7 | 0x07, + 40330 - 19968: jis0212<<14 | 0x4B<<7 | 0x05, + 40333 - 19968: jis0212<<14 | 0x4B<<7 | 0x06, + 40334 - 19968: jis0212<<14 | 0x4B<<7 | 0x07, + 40335 - 19968: jis0208<<14 | 0x16<<7 | 0x3B, + 40338 - 19968: jis0212<<14 | 0x4B<<7 | 0x08, + 40339 - 19968: jis0212<<14 | 0x4B<<7 | 0x09, + 40341 - 19968: jis0212<<14 | 0x4B<<7 | 0x0A, + 40342 - 19968: jis0212<<14 | 0x4B<<7 | 0x0B, + 40343 - 19968: jis0212<<14 | 0x4B<<7 | 0x0C, + 40344 - 19968: jis0212<<14 | 0x4B<<7 | 0x0D, + 40346 - 19968: jis0208<<14 | 0x52<<7 | 0x0C, + 40353 - 19968: jis0212<<14 | 0x4B<<7 | 0x0E, + 40356 - 19968: jis0208<<14 | 0x52<<7 | 0x0D, + 40361 - 19968: jis0208<<14 | 0x52<<7 | 0x0E, + 40362 - 19968: jis0212<<14 | 0x4B<<7 | 0x0F, + 40363 - 19968: jis0208<<14 | 0x52<<7 | 0x09, + 40364 - 19968: jis0212<<14 | 0x4B<<7 | 0x10, + 40366 - 19968: jis0212<<14 | 0x4B<<7 | 0x11, + 40367 - 19968: jis0208<<14 | 0x51<<7 | 0x53, + 40369 - 19968: jis0212<<14 | 0x4B<<7 | 0x12, + 40370 - 19968: jis0208<<14 | 0x52<<7 | 0x0F, + 40372 - 19968: jis0208<<14 | 0x23<<7 | 0x40, + 40373 - 19968: jis0212<<14 | 0x4B<<7 | 0x13, + 40376 - 19968: jis0208<<14 | 0x52<<7 | 0x13, + 40377 - 19968: jis0212<<14 | 0x4B<<7 | 0x14, + 40378 - 19968: jis0208<<14 | 0x52<<7 | 0x14, + 40379 - 19968: jis0208<<14 | 0x52<<7 | 0x12, + 40380 - 19968: jis0212<<14 | 0x4B<<7 | 0x15, + 40383 - 19968: jis0212<<14 | 0x4B<<7 | 0x16, + 40385 - 19968: jis0208<<14 | 0x52<<7 | 0x11, + 40386 - 19968: jis0208<<14 | 0x52<<7 | 0x17, + 40387 - 19968: jis0212<<14 | 0x4B<<7 | 0x17, + 40388 - 19968: jis0208<<14 | 0x52<<7 | 0x10, + 40390 - 19968: jis0208<<14 | 0x52<<7 | 0x15, + 40391 - 19968: jis0212<<14 | 0x4B<<7 | 0x18, + 40393 - 19968: jis0212<<14 | 0x4B<<7 | 0x19, + 40394 - 19968: jis0212<<14 | 0x4B<<7 | 0x1A, + 40399 - 19968: jis0208<<14 | 0x52<<7 | 0x16, + 40403 - 19968: jis0208<<14 | 0x52<<7 | 0x19, + 40404 - 19968: jis0212<<14 | 0x4B<<7 | 0x1B, + 40405 - 19968: jis0212<<14 | 0x4B<<7 | 0x1C, + 40406 - 19968: jis0212<<14 | 0x4B<<7 | 0x1D, + 40407 - 19968: jis0212<<14 | 0x4B<<7 | 0x1E, + 40409 - 19968: jis0208<<14 | 0x52<<7 | 0x18, + 40410 - 19968: jis0212<<14 | 0x4B<<7 | 0x1F, + 40414 - 19968: jis0212<<14 | 0x4B<<7 | 0x20, + 40415 - 19968: jis0212<<14 | 0x4B<<7 | 0x21, + 40416 - 19968: jis0212<<14 | 0x4B<<7 | 0x22, + 40421 - 19968: jis0212<<14 | 0x4B<<7 | 0x23, + 40422 - 19968: jis0208<<14 | 0x52<<7 | 0x1B, + 40423 - 19968: jis0212<<14 | 0x4B<<7 | 0x24, + 40425 - 19968: jis0212<<14 | 0x4B<<7 | 0x25, + 40427 - 19968: jis0212<<14 | 0x4B<<7 | 0x26, + 40429 - 19968: jis0208<<14 | 0x52<<7 | 0x1C, + 40430 - 19968: jis0212<<14 | 0x4B<<7 | 0x27, + 40431 - 19968: jis0208<<14 | 0x52<<7 | 0x1D, + 40432 - 19968: jis0212<<14 | 0x4B<<7 | 0x28, + 40434 - 19968: jis0208<<14 | 0x2E<<7 | 0x28, + 40435 - 19968: jis0212<<14 | 0x4B<<7 | 0x29, + 40436 - 19968: jis0212<<14 | 0x4B<<7 | 0x2A, + 40440 - 19968: jis0208<<14 | 0x52<<7 | 0x1A, + 40441 - 19968: jis0208<<14 | 0x21<<7 | 0x4A, + 40442 - 19968: jis0208<<14 | 0x19<<7 | 0x4C, + 40445 - 19968: jis0208<<14 | 0x52<<7 | 0x1E, + 40446 - 19968: jis0212<<14 | 0x4B<<7 | 0x2B, + 40450 - 19968: jis0212<<14 | 0x4B<<7 | 0x2D, + 40455 - 19968: jis0212<<14 | 0x4B<<7 | 0x2E, + 40458 - 19968: jis0212<<14 | 0x4B<<7 | 0x2C, + 40462 - 19968: jis0212<<14 | 0x4B<<7 | 0x2F, + 40464 - 19968: jis0212<<14 | 0x4B<<7 | 0x30, + 40465 - 19968: jis0212<<14 | 0x4B<<7 | 0x31, + 40466 - 19968: jis0212<<14 | 0x4B<<7 | 0x32, + 40469 - 19968: jis0212<<14 | 0x4B<<7 | 0x33, + 40470 - 19968: jis0212<<14 | 0x4B<<7 | 0x34, + 40473 - 19968: jis0208<<14 | 0x5B<<7 | 0x4C, + 40474 - 19968: jis0208<<14 | 0x52<<7 | 0x1F, + 40475 - 19968: jis0208<<14 | 0x52<<7 | 0x20, + 40476 - 19968: jis0212<<14 | 0x4B<<7 | 0x36, + 40477 - 19968: jis0212<<14 | 0x4B<<7 | 0x37, + 40478 - 19968: jis0208<<14 | 0x52<<7 | 0x21, + 40565 - 19968: jis0208<<14 | 0x52<<7 | 0x22, + 40568 - 19968: jis0208<<14 | 0x17<<7 | 0x13, + 40569 - 19968: jis0208<<14 | 0x52<<7 | 0x23, + 40570 - 19968: jis0212<<14 | 0x4B<<7 | 0x38, + 40571 - 19968: jis0212<<14 | 0x4B<<7 | 0x39, + 40572 - 19968: jis0212<<14 | 0x4B<<7 | 0x3A, + 40573 - 19968: jis0208<<14 | 0x52<<7 | 0x24, + 40575 - 19968: jis0208<<14 | 0x1B<<7 | 0x0E, + 40576 - 19968: jis0212<<14 | 0x4B<<7 | 0x3B, + 40577 - 19968: jis0208<<14 | 0x52<<7 | 0x25, + 40578 - 19968: jis0212<<14 | 0x4B<<7 | 0x3C, + 40579 - 19968: jis0212<<14 | 0x4B<<7 | 0x3D, + 40580 - 19968: jis0212<<14 | 0x4B<<7 | 0x3E, + 40581 - 19968: jis0212<<14 | 0x4B<<7 | 0x3F, + 40583 - 19968: jis0212<<14 | 0x4B<<7 | 0x40, + 40584 - 19968: jis0208<<14 | 0x52<<7 | 0x26, + 40587 - 19968: jis0208<<14 | 0x52<<7 | 0x27, + 40588 - 19968: jis0208<<14 | 0x52<<7 | 0x28, + 40590 - 19968: jis0212<<14 | 0x4B<<7 | 0x41, + 40591 - 19968: jis0212<<14 | 0x4B<<7 | 0x42, + 40593 - 19968: jis0208<<14 | 0x52<<7 | 0x2B, + 40594 - 19968: jis0208<<14 | 0x52<<7 | 0x29, + 40595 - 19968: jis0208<<14 | 0x2E<<7 | 0x1B, + 40597 - 19968: jis0208<<14 | 0x52<<7 | 0x2A, + 40598 - 19968: jis0212<<14 | 0x4B<<7 | 0x43, + 40599 - 19968: jis0208<<14 | 0x2D<<7 | 0x4E, + 40600 - 19968: jis0212<<14 | 0x4B<<7 | 0x44, + 40603 - 19968: jis0212<<14 | 0x4B<<7 | 0x45, + 40605 - 19968: jis0208<<14 | 0x52<<7 | 0x2C, + 40606 - 19968: jis0212<<14 | 0x4B<<7 | 0x46, + 40607 - 19968: jis0208<<14 | 0x2D<<7 | 0x3A, + 40612 - 19968: jis0212<<14 | 0x4B<<7 | 0x47, + 40613 - 19968: jis0208<<14 | 0x52<<7 | 0x2D, + 40614 - 19968: jis0208<<14 | 0x26<<7 | 0x5D, + 40616 - 19968: jis0212<<14 | 0x4B<<7 | 0x48, + 40617 - 19968: jis0208<<14 | 0x52<<7 | 0x2E, + 40618 - 19968: jis0208<<14 | 0x52<<7 | 0x30, + 40620 - 19968: jis0212<<14 | 0x4B<<7 | 0x49, + 40621 - 19968: jis0208<<14 | 0x52<<7 | 0x31, + 40622 - 19968: jis0212<<14 | 0x4B<<7 | 0x4A, + 40623 - 19968: jis0212<<14 | 0x4B<<7 | 0x4B, + 40624 - 19968: jis0212<<14 | 0x4B<<7 | 0x4C, + 40627 - 19968: jis0212<<14 | 0x4B<<7 | 0x4D, + 40628 - 19968: jis0212<<14 | 0x4B<<7 | 0x4E, + 40629 - 19968: jis0212<<14 | 0x4B<<7 | 0x4F, + 40632 - 19968: jis0208<<14 | 0x52<<7 | 0x2F, + 40633 - 19968: jis0208<<14 | 0x18<<7 | 0x4C, + 40634 - 19968: jis0208<<14 | 0x2B<<7 | 0x2C, + 40635 - 19968: jis0208<<14 | 0x2A<<7 | 0x42, + 40636 - 19968: jis0208<<14 | 0x35<<7 | 0x56, + 40638 - 19968: jis0208<<14 | 0x3C<<7 | 0x3F, + 40639 - 19968: jis0208<<14 | 0x2A<<7 | 0x5A, + 40644 - 19968: jis0208<<14 | 0x11<<7 | 0x0A, + 40646 - 19968: jis0212<<14 | 0x4B<<7 | 0x50, + 40648 - 19968: jis0212<<14 | 0x4B<<7 | 0x51, + 40651 - 19968: jis0212<<14 | 0x4B<<7 | 0x52, + 40652 - 19968: jis0208<<14 | 0x52<<7 | 0x33, + 40653 - 19968: jis0208<<14 | 0x14<<7 | 0x2F, + 40654 - 19968: jis0208<<14 | 0x52<<7 | 0x34, + 40655 - 19968: jis0208<<14 | 0x52<<7 | 0x35, + 40656 - 19968: jis0208<<14 | 0x52<<7 | 0x36, + 40657 - 19968: jis0208<<14 | 0x5B<<7 | 0x4D, + 40658 - 19968: jis0208<<14 | 0x18<<7 | 0x54, + 40660 - 19968: jis0208<<14 | 0x52<<7 | 0x37, + 40661 - 19968: jis0212<<14 | 0x4B<<7 | 0x53, + 40664 - 19968: jis0208<<14 | 0x3F<<7 | 0x33, + 40665 - 19968: jis0208<<14 | 0x2B<<7 | 0x3A, + 40667 - 19968: jis0208<<14 | 0x21<<7 | 0x42, + 40668 - 19968: jis0208<<14 | 0x52<<7 | 0x38, + 40669 - 19968: jis0208<<14 | 0x52<<7 | 0x3A, + 40670 - 19968: jis0208<<14 | 0x52<<7 | 0x39, + 40671 - 19968: jis0212<<14 | 0x4B<<7 | 0x54, + 40672 - 19968: jis0208<<14 | 0x52<<7 | 0x3B, + 40676 - 19968: jis0212<<14 | 0x4B<<7 | 0x55, + 40677 - 19968: jis0208<<14 | 0x52<<7 | 0x3C, + 40679 - 19968: jis0212<<14 | 0x4B<<7 | 0x56, + 40680 - 19968: jis0208<<14 | 0x52<<7 | 0x3D, + 40684 - 19968: jis0212<<14 | 0x4B<<7 | 0x57, + 40685 - 19968: jis0212<<14 | 0x4B<<7 | 0x58, + 40686 - 19968: jis0212<<14 | 0x4B<<7 | 0x59, + 40687 - 19968: jis0208<<14 | 0x52<<7 | 0x3E, + 40688 - 19968: jis0212<<14 | 0x4B<<7 | 0x5A, + 40689 - 19968: jis0212<<14 | 0x4B<<7 | 0x5B, + 40690 - 19968: jis0212<<14 | 0x4B<<7 | 0x5C, + 40692 - 19968: jis0208<<14 | 0x52<<7 | 0x3F, + 40693 - 19968: jis0212<<14 | 0x4B<<7 | 0x5D, + 40694 - 19968: jis0208<<14 | 0x52<<7 | 0x40, + 40695 - 19968: jis0208<<14 | 0x52<<7 | 0x41, + 40696 - 19968: jis0212<<14 | 0x4C<<7 | 0x00, + 40697 - 19968: jis0208<<14 | 0x52<<7 | 0x42, + 40699 - 19968: jis0208<<14 | 0x52<<7 | 0x43, + 40700 - 19968: jis0208<<14 | 0x52<<7 | 0x44, + 40701 - 19968: jis0208<<14 | 0x52<<7 | 0x45, + 40703 - 19968: jis0212<<14 | 0x4C<<7 | 0x01, + 40706 - 19968: jis0212<<14 | 0x4C<<7 | 0x02, + 40707 - 19968: jis0212<<14 | 0x4C<<7 | 0x03, + 40711 - 19968: jis0208<<14 | 0x52<<7 | 0x46, + 40712 - 19968: jis0208<<14 | 0x52<<7 | 0x47, + 40713 - 19968: jis0212<<14 | 0x4C<<7 | 0x04, + 40718 - 19968: jis0208<<14 | 0x24<<7 | 0x03, + 40719 - 19968: jis0212<<14 | 0x4C<<7 | 0x05, + 40720 - 19968: jis0212<<14 | 0x4C<<7 | 0x06, + 40721 - 19968: jis0212<<14 | 0x4C<<7 | 0x07, + 40722 - 19968: jis0212<<14 | 0x4C<<7 | 0x08, + 40723 - 19968: jis0208<<14 | 0x17<<7 | 0x3C, + 40724 - 19968: jis0212<<14 | 0x4C<<7 | 0x09, + 40725 - 19968: jis0208<<14 | 0x52<<7 | 0x49, + 40726 - 19968: jis0212<<14 | 0x4C<<7 | 0x0A, + 40727 - 19968: jis0212<<14 | 0x4C<<7 | 0x0B, + 40729 - 19968: jis0212<<14 | 0x4C<<7 | 0x0C, + 40730 - 19968: jis0212<<14 | 0x4C<<7 | 0x0D, + 40731 - 19968: jis0212<<14 | 0x4C<<7 | 0x0E, + 40735 - 19968: jis0212<<14 | 0x4C<<7 | 0x0F, + 40736 - 19968: jis0208<<14 | 0x20<<7 | 0x2C, + 40737 - 19968: jis0208<<14 | 0x52<<7 | 0x4A, + 40738 - 19968: jis0212<<14 | 0x4C<<7 | 0x10, + 40742 - 19968: jis0212<<14 | 0x4C<<7 | 0x11, + 40746 - 19968: jis0212<<14 | 0x4C<<7 | 0x12, + 40747 - 19968: jis0212<<14 | 0x4C<<7 | 0x13, + 40748 - 19968: jis0208<<14 | 0x52<<7 | 0x4B, + 40751 - 19968: jis0212<<14 | 0x4C<<7 | 0x14, + 40753 - 19968: jis0212<<14 | 0x4C<<7 | 0x15, + 40754 - 19968: jis0212<<14 | 0x4C<<7 | 0x16, + 40756 - 19968: jis0212<<14 | 0x4C<<7 | 0x17, + 40759 - 19968: jis0212<<14 | 0x4C<<7 | 0x18, + 40761 - 19968: jis0212<<14 | 0x4C<<7 | 0x19, + 40762 - 19968: jis0212<<14 | 0x4C<<7 | 0x1A, + 40763 - 19968: jis0208<<14 | 0x28<<7 | 0x00, + 40764 - 19968: jis0212<<14 | 0x4C<<7 | 0x1B, + 40765 - 19968: jis0212<<14 | 0x4C<<7 | 0x1C, + 40766 - 19968: jis0208<<14 | 0x52<<7 | 0x4C, + 40767 - 19968: jis0212<<14 | 0x4C<<7 | 0x1D, + 40769 - 19968: jis0212<<14 | 0x4C<<7 | 0x1E, + 40771 - 19968: jis0212<<14 | 0x4C<<7 | 0x1F, + 40772 - 19968: jis0212<<14 | 0x4C<<7 | 0x20, + 40773 - 19968: jis0212<<14 | 0x4C<<7 | 0x21, + 40774 - 19968: jis0212<<14 | 0x4C<<7 | 0x22, + 40775 - 19968: jis0212<<14 | 0x4C<<7 | 0x23, + 40778 - 19968: jis0208<<14 | 0x52<<7 | 0x4D, + 40779 - 19968: jis0208<<14 | 0x42<<7 | 0x16, + 40782 - 19968: jis0208<<14 | 0x4B<<7 | 0x39, + 40783 - 19968: jis0208<<14 | 0x4F<<7 | 0x4C, + 40786 - 19968: jis0208<<14 | 0x52<<7 | 0x4E, + 40787 - 19968: jis0212<<14 | 0x4C<<7 | 0x24, + 40788 - 19968: jis0208<<14 | 0x52<<7 | 0x4F, + 40789 - 19968: jis0212<<14 | 0x4C<<7 | 0x25, + 40790 - 19968: jis0212<<14 | 0x4C<<7 | 0x26, + 40791 - 19968: jis0212<<14 | 0x4C<<7 | 0x27, + 40792 - 19968: jis0212<<14 | 0x4C<<7 | 0x28, + 40794 - 19968: jis0212<<14 | 0x4C<<7 | 0x29, + 40797 - 19968: jis0212<<14 | 0x4C<<7 | 0x2A, + 40798 - 19968: jis0212<<14 | 0x4C<<7 | 0x2B, + 40799 - 19968: jis0208<<14 | 0x52<<7 | 0x51, + 40800 - 19968: jis0208<<14 | 0x52<<7 | 0x52, + 40801 - 19968: jis0208<<14 | 0x52<<7 | 0x53, + 40802 - 19968: jis0208<<14 | 0x2D<<7 | 0x4F, + 40803 - 19968: jis0208<<14 | 0x52<<7 | 0x50, + 40806 - 19968: jis0208<<14 | 0x52<<7 | 0x54, + 40807 - 19968: jis0208<<14 | 0x52<<7 | 0x55, + 40808 - 19968: jis0212<<14 | 0x4C<<7 | 0x2C, + 40809 - 19968: jis0212<<14 | 0x4C<<7 | 0x2D, + 40810 - 19968: jis0208<<14 | 0x52<<7 | 0x57, + 40812 - 19968: jis0208<<14 | 0x52<<7 | 0x56, + 40813 - 19968: jis0212<<14 | 0x4C<<7 | 0x2E, + 40814 - 19968: jis0212<<14 | 0x4C<<7 | 0x2F, + 40815 - 19968: jis0212<<14 | 0x4C<<7 | 0x30, + 40816 - 19968: jis0212<<14 | 0x4C<<7 | 0x31, + 40817 - 19968: jis0212<<14 | 0x4C<<7 | 0x32, + 40818 - 19968: jis0208<<14 | 0x52<<7 | 0x59, + 40819 - 19968: jis0212<<14 | 0x4C<<7 | 0x33, + 40821 - 19968: jis0212<<14 | 0x4C<<7 | 0x34, + 40822 - 19968: jis0208<<14 | 0x52<<7 | 0x5A, + 40823 - 19968: jis0208<<14 | 0x52<<7 | 0x58, + 40826 - 19968: jis0212<<14 | 0x4C<<7 | 0x35, + 40829 - 19968: jis0212<<14 | 0x4C<<7 | 0x36, + 40845 - 19968: jis0208<<14 | 0x2D<<7 | 0x15, + 40847 - 19968: jis0212<<14 | 0x4C<<7 | 0x37, + 40848 - 19968: jis0212<<14 | 0x4C<<7 | 0x38, + 40849 - 19968: jis0212<<14 | 0x4C<<7 | 0x39, + 40850 - 19968: jis0212<<14 | 0x4C<<7 | 0x3A, + 40852 - 19968: jis0212<<14 | 0x4C<<7 | 0x3B, + 40853 - 19968: jis0208<<14 | 0x52<<7 | 0x5B, + 40854 - 19968: jis0212<<14 | 0x4C<<7 | 0x3C, + 40855 - 19968: jis0212<<14 | 0x4C<<7 | 0x3D, + 40860 - 19968: jis0208<<14 | 0x52<<7 | 0x5C, + 40861 - 19968: jis0208<<14 | 0x42<<7 | 0x33, + 40862 - 19968: jis0212<<14 | 0x4C<<7 | 0x3E, + 40864 - 19968: jis0208<<14 | 0x52<<7 | 0x5D, + 40865 - 19968: jis0212<<14 | 0x4C<<7 | 0x3F, + 40866 - 19968: jis0212<<14 | 0x4C<<7 | 0x40, + 40867 - 19968: jis0212<<14 | 0x4C<<7 | 0x41, + 40869 - 19968: jis0212<<14 | 0x4C<<7 | 0x42, +} + +const encode1Low, encode1High = 8208, 9840 + +var encode1 = [...]uint16{ + 8208 - 8208: jis0208<<14 | 0x00<<7 | 0x1D, + 8213 - 8208: jis0208<<14 | 0x00<<7 | 0x1C, + 8216 - 8208: jis0208<<14 | 0x00<<7 | 0x25, + 8217 - 8208: jis0208<<14 | 0x00<<7 | 0x26, + 8220 - 8208: jis0208<<14 | 0x00<<7 | 0x27, + 8221 - 8208: jis0208<<14 | 0x00<<7 | 0x28, + 8224 - 8208: jis0208<<14 | 0x01<<7 | 0x56, + 8225 - 8208: jis0208<<14 | 0x01<<7 | 0x57, + 8229 - 8208: jis0208<<14 | 0x00<<7 | 0x24, + 8230 - 8208: jis0208<<14 | 0x00<<7 | 0x23, + 8240 - 8208: jis0208<<14 | 0x01<<7 | 0x52, + 8242 - 8208: jis0208<<14 | 0x00<<7 | 0x4B, + 8243 - 8208: jis0208<<14 | 0x00<<7 | 0x4C, + 8251 - 8208: jis0208<<14 | 0x01<<7 | 0x07, + 8451 - 8208: jis0208<<14 | 0x00<<7 | 0x4D, + 8470 - 8208: jis0208<<14 | 0x0C<<7 | 0x41, + 8481 - 8208: jis0208<<14 | 0x0C<<7 | 0x43, + 8482 - 8208: jis0212<<14 | 0x01<<7 | 0x4E, + 8491 - 8208: jis0208<<14 | 0x01<<7 | 0x51, + 8544 - 8208: jis0208<<14 | 0x0C<<7 | 0x14, + 8545 - 8208: jis0208<<14 | 0x0C<<7 | 0x15, + 8546 - 8208: jis0208<<14 | 0x0C<<7 | 0x16, + 8547 - 8208: jis0208<<14 | 0x0C<<7 | 0x17, + 8548 - 8208: jis0208<<14 | 0x0C<<7 | 0x18, + 8549 - 8208: jis0208<<14 | 0x0C<<7 | 0x19, + 8550 - 8208: jis0208<<14 | 0x0C<<7 | 0x1A, + 8551 - 8208: jis0208<<14 | 0x0C<<7 | 0x1B, + 8552 - 8208: jis0208<<14 | 0x0C<<7 | 0x1C, + 8553 - 8208: jis0208<<14 | 0x0C<<7 | 0x1D, + 8560 - 8208: jis0208<<14 | 0x5B<<7 | 0x50, + 8561 - 8208: jis0208<<14 | 0x5B<<7 | 0x51, + 8562 - 8208: jis0208<<14 | 0x5B<<7 | 0x52, + 8563 - 8208: jis0208<<14 | 0x5B<<7 | 0x53, + 8564 - 8208: jis0208<<14 | 0x5B<<7 | 0x54, + 8565 - 8208: jis0208<<14 | 0x5B<<7 | 0x55, + 8566 - 8208: jis0208<<14 | 0x5B<<7 | 0x56, + 8567 - 8208: jis0208<<14 | 0x5B<<7 | 0x57, + 8568 - 8208: jis0208<<14 | 0x5B<<7 | 0x58, + 8569 - 8208: jis0208<<14 | 0x5B<<7 | 0x59, + 8592 - 8208: jis0208<<14 | 0x01<<7 | 0x0A, + 8593 - 8208: jis0208<<14 | 0x01<<7 | 0x0B, + 8594 - 8208: jis0208<<14 | 0x01<<7 | 0x09, + 8595 - 8208: jis0208<<14 | 0x01<<7 | 0x0C, + 8658 - 8208: jis0208<<14 | 0x01<<7 | 0x2C, + 8660 - 8208: jis0208<<14 | 0x01<<7 | 0x2D, + 8704 - 8208: jis0208<<14 | 0x01<<7 | 0x2E, + 8706 - 8208: jis0208<<14 | 0x01<<7 | 0x3E, + 8707 - 8208: jis0208<<14 | 0x01<<7 | 0x2F, + 8711 - 8208: jis0208<<14 | 0x01<<7 | 0x3F, + 8712 - 8208: jis0208<<14 | 0x01<<7 | 0x19, + 8715 - 8208: jis0208<<14 | 0x01<<7 | 0x1A, + 8721 - 8208: jis0208<<14 | 0x0C<<7 | 0x53, + 8730 - 8208: jis0208<<14 | 0x01<<7 | 0x44, + 8733 - 8208: jis0208<<14 | 0x01<<7 | 0x46, + 8734 - 8208: jis0208<<14 | 0x00<<7 | 0x46, + 8735 - 8208: jis0208<<14 | 0x0C<<7 | 0x57, + 8736 - 8208: jis0208<<14 | 0x01<<7 | 0x3B, + 8741 - 8208: jis0208<<14 | 0x00<<7 | 0x21, + 8743 - 8208: jis0208<<14 | 0x01<<7 | 0x29, + 8744 - 8208: jis0208<<14 | 0x01<<7 | 0x2A, + 8745 - 8208: jis0208<<14 | 0x01<<7 | 0x20, + 8746 - 8208: jis0208<<14 | 0x01<<7 | 0x1F, + 8747 - 8208: jis0208<<14 | 0x01<<7 | 0x48, + 8748 - 8208: jis0208<<14 | 0x01<<7 | 0x49, + 8750 - 8208: jis0208<<14 | 0x0C<<7 | 0x52, + 8756 - 8208: jis0208<<14 | 0x00<<7 | 0x47, + 8757 - 8208: jis0208<<14 | 0x01<<7 | 0x47, + 8765 - 8208: jis0208<<14 | 0x01<<7 | 0x45, + 8786 - 8208: jis0208<<14 | 0x01<<7 | 0x41, + 8800 - 8208: jis0208<<14 | 0x00<<7 | 0x41, + 8801 - 8208: jis0208<<14 | 0x01<<7 | 0x40, + 8806 - 8208: jis0208<<14 | 0x00<<7 | 0x44, + 8807 - 8208: jis0208<<14 | 0x00<<7 | 0x45, + 8810 - 8208: jis0208<<14 | 0x01<<7 | 0x42, + 8811 - 8208: jis0208<<14 | 0x01<<7 | 0x43, + 8834 - 8208: jis0208<<14 | 0x01<<7 | 0x1D, + 8835 - 8208: jis0208<<14 | 0x01<<7 | 0x1E, + 8838 - 8208: jis0208<<14 | 0x01<<7 | 0x1B, + 8839 - 8208: jis0208<<14 | 0x01<<7 | 0x1C, + 8869 - 8208: jis0208<<14 | 0x01<<7 | 0x3C, + 8895 - 8208: jis0208<<14 | 0x0C<<7 | 0x58, + 8978 - 8208: jis0208<<14 | 0x01<<7 | 0x3D, + 9312 - 8208: jis0208<<14 | 0x0C<<7 | 0x00, + 9313 - 8208: jis0208<<14 | 0x0C<<7 | 0x01, + 9314 - 8208: jis0208<<14 | 0x0C<<7 | 0x02, + 9315 - 8208: jis0208<<14 | 0x0C<<7 | 0x03, + 9316 - 8208: jis0208<<14 | 0x0C<<7 | 0x04, + 9317 - 8208: jis0208<<14 | 0x0C<<7 | 0x05, + 9318 - 8208: jis0208<<14 | 0x0C<<7 | 0x06, + 9319 - 8208: jis0208<<14 | 0x0C<<7 | 0x07, + 9320 - 8208: jis0208<<14 | 0x0C<<7 | 0x08, + 9321 - 8208: jis0208<<14 | 0x0C<<7 | 0x09, + 9322 - 8208: jis0208<<14 | 0x0C<<7 | 0x0A, + 9323 - 8208: jis0208<<14 | 0x0C<<7 | 0x0B, + 9324 - 8208: jis0208<<14 | 0x0C<<7 | 0x0C, + 9325 - 8208: jis0208<<14 | 0x0C<<7 | 0x0D, + 9326 - 8208: jis0208<<14 | 0x0C<<7 | 0x0E, + 9327 - 8208: jis0208<<14 | 0x0C<<7 | 0x0F, + 9328 - 8208: jis0208<<14 | 0x0C<<7 | 0x10, + 9329 - 8208: jis0208<<14 | 0x0C<<7 | 0x11, + 9330 - 8208: jis0208<<14 | 0x0C<<7 | 0x12, + 9331 - 8208: jis0208<<14 | 0x0C<<7 | 0x13, + 9472 - 8208: jis0208<<14 | 0x07<<7 | 0x00, + 9473 - 8208: jis0208<<14 | 0x07<<7 | 0x0B, + 9474 - 8208: jis0208<<14 | 0x07<<7 | 0x01, + 9475 - 8208: jis0208<<14 | 0x07<<7 | 0x0C, + 9484 - 8208: jis0208<<14 | 0x07<<7 | 0x02, + 9487 - 8208: jis0208<<14 | 0x07<<7 | 0x0D, + 9488 - 8208: jis0208<<14 | 0x07<<7 | 0x03, + 9491 - 8208: jis0208<<14 | 0x07<<7 | 0x0E, + 9492 - 8208: jis0208<<14 | 0x07<<7 | 0x05, + 9495 - 8208: jis0208<<14 | 0x07<<7 | 0x10, + 9496 - 8208: jis0208<<14 | 0x07<<7 | 0x04, + 9499 - 8208: jis0208<<14 | 0x07<<7 | 0x0F, + 9500 - 8208: jis0208<<14 | 0x07<<7 | 0x06, + 9501 - 8208: jis0208<<14 | 0x07<<7 | 0x1B, + 9504 - 8208: jis0208<<14 | 0x07<<7 | 0x16, + 9507 - 8208: jis0208<<14 | 0x07<<7 | 0x11, + 9508 - 8208: jis0208<<14 | 0x07<<7 | 0x08, + 9509 - 8208: jis0208<<14 | 0x07<<7 | 0x1D, + 9512 - 8208: jis0208<<14 | 0x07<<7 | 0x18, + 9515 - 8208: jis0208<<14 | 0x07<<7 | 0x13, + 9516 - 8208: jis0208<<14 | 0x07<<7 | 0x07, + 9519 - 8208: jis0208<<14 | 0x07<<7 | 0x17, + 9520 - 8208: jis0208<<14 | 0x07<<7 | 0x1C, + 9523 - 8208: jis0208<<14 | 0x07<<7 | 0x12, + 9524 - 8208: jis0208<<14 | 0x07<<7 | 0x09, + 9527 - 8208: jis0208<<14 | 0x07<<7 | 0x19, + 9528 - 8208: jis0208<<14 | 0x07<<7 | 0x1E, + 9531 - 8208: jis0208<<14 | 0x07<<7 | 0x14, + 9532 - 8208: jis0208<<14 | 0x07<<7 | 0x0A, + 9535 - 8208: jis0208<<14 | 0x07<<7 | 0x1A, + 9538 - 8208: jis0208<<14 | 0x07<<7 | 0x1F, + 9547 - 8208: jis0208<<14 | 0x07<<7 | 0x15, + 9632 - 8208: jis0208<<14 | 0x01<<7 | 0x02, + 9633 - 8208: jis0208<<14 | 0x01<<7 | 0x01, + 9650 - 8208: jis0208<<14 | 0x01<<7 | 0x04, + 9651 - 8208: jis0208<<14 | 0x01<<7 | 0x03, + 9660 - 8208: jis0208<<14 | 0x01<<7 | 0x06, + 9661 - 8208: jis0208<<14 | 0x01<<7 | 0x05, + 9670 - 8208: jis0208<<14 | 0x01<<7 | 0x00, + 9671 - 8208: jis0208<<14 | 0x00<<7 | 0x5D, + 9675 - 8208: jis0208<<14 | 0x00<<7 | 0x5A, + 9678 - 8208: jis0208<<14 | 0x00<<7 | 0x5C, + 9679 - 8208: jis0208<<14 | 0x00<<7 | 0x5B, + 9711 - 8208: jis0208<<14 | 0x01<<7 | 0x5D, + 9733 - 8208: jis0208<<14 | 0x00<<7 | 0x59, + 9734 - 8208: jis0208<<14 | 0x00<<7 | 0x58, + 9792 - 8208: jis0208<<14 | 0x00<<7 | 0x49, + 9794 - 8208: jis0208<<14 | 0x00<<7 | 0x48, + 9834 - 8208: jis0208<<14 | 0x01<<7 | 0x55, + 9837 - 8208: jis0208<<14 | 0x01<<7 | 0x54, + 9839 - 8208: jis0208<<14 | 0x01<<7 | 0x53, +} + +const encode2Low, encode2High = 12288, 13262 + +var encode2 = [...]uint16{ + 12288 - 12288: jis0208<<14 | 0x00<<7 | 0x00, + 12289 - 12288: jis0208<<14 | 0x00<<7 | 0x01, + 12290 - 12288: jis0208<<14 | 0x00<<7 | 0x02, + 12291 - 12288: jis0208<<14 | 0x00<<7 | 0x16, + 12293 - 12288: jis0208<<14 | 0x00<<7 | 0x18, + 12294 - 12288: jis0208<<14 | 0x00<<7 | 0x19, + 12295 - 12288: jis0208<<14 | 0x00<<7 | 0x1A, + 12296 - 12288: jis0208<<14 | 0x00<<7 | 0x31, + 12297 - 12288: jis0208<<14 | 0x00<<7 | 0x32, + 12298 - 12288: jis0208<<14 | 0x00<<7 | 0x33, + 12299 - 12288: jis0208<<14 | 0x00<<7 | 0x34, + 12300 - 12288: jis0208<<14 | 0x00<<7 | 0x35, + 12301 - 12288: jis0208<<14 | 0x00<<7 | 0x36, + 12302 - 12288: jis0208<<14 | 0x00<<7 | 0x37, + 12303 - 12288: jis0208<<14 | 0x00<<7 | 0x38, + 12304 - 12288: jis0208<<14 | 0x00<<7 | 0x39, + 12305 - 12288: jis0208<<14 | 0x00<<7 | 0x3A, + 12306 - 12288: jis0208<<14 | 0x01<<7 | 0x08, + 12307 - 12288: jis0208<<14 | 0x01<<7 | 0x0D, + 12308 - 12288: jis0208<<14 | 0x00<<7 | 0x2B, + 12309 - 12288: jis0208<<14 | 0x00<<7 | 0x2C, + 12317 - 12288: jis0208<<14 | 0x0C<<7 | 0x3F, + 12319 - 12288: jis0208<<14 | 0x0C<<7 | 0x40, + 12353 - 12288: jis0208<<14 | 0x03<<7 | 0x00, + 12354 - 12288: jis0208<<14 | 0x03<<7 | 0x01, + 12355 - 12288: jis0208<<14 | 0x03<<7 | 0x02, + 12356 - 12288: jis0208<<14 | 0x03<<7 | 0x03, + 12357 - 12288: jis0208<<14 | 0x03<<7 | 0x04, + 12358 - 12288: jis0208<<14 | 0x03<<7 | 0x05, + 12359 - 12288: jis0208<<14 | 0x03<<7 | 0x06, + 12360 - 12288: jis0208<<14 | 0x03<<7 | 0x07, + 12361 - 12288: jis0208<<14 | 0x03<<7 | 0x08, + 12362 - 12288: jis0208<<14 | 0x03<<7 | 0x09, + 12363 - 12288: jis0208<<14 | 0x03<<7 | 0x0A, + 12364 - 12288: jis0208<<14 | 0x03<<7 | 0x0B, + 12365 - 12288: jis0208<<14 | 0x03<<7 | 0x0C, + 12366 - 12288: jis0208<<14 | 0x03<<7 | 0x0D, + 12367 - 12288: jis0208<<14 | 0x03<<7 | 0x0E, + 12368 - 12288: jis0208<<14 | 0x03<<7 | 0x0F, + 12369 - 12288: jis0208<<14 | 0x03<<7 | 0x10, + 12370 - 12288: jis0208<<14 | 0x03<<7 | 0x11, + 12371 - 12288: jis0208<<14 | 0x03<<7 | 0x12, + 12372 - 12288: jis0208<<14 | 0x03<<7 | 0x13, + 12373 - 12288: jis0208<<14 | 0x03<<7 | 0x14, + 12374 - 12288: jis0208<<14 | 0x03<<7 | 0x15, + 12375 - 12288: jis0208<<14 | 0x03<<7 | 0x16, + 12376 - 12288: jis0208<<14 | 0x03<<7 | 0x17, + 12377 - 12288: jis0208<<14 | 0x03<<7 | 0x18, + 12378 - 12288: jis0208<<14 | 0x03<<7 | 0x19, + 12379 - 12288: jis0208<<14 | 0x03<<7 | 0x1A, + 12380 - 12288: jis0208<<14 | 0x03<<7 | 0x1B, + 12381 - 12288: jis0208<<14 | 0x03<<7 | 0x1C, + 12382 - 12288: jis0208<<14 | 0x03<<7 | 0x1D, + 12383 - 12288: jis0208<<14 | 0x03<<7 | 0x1E, + 12384 - 12288: jis0208<<14 | 0x03<<7 | 0x1F, + 12385 - 12288: jis0208<<14 | 0x03<<7 | 0x20, + 12386 - 12288: jis0208<<14 | 0x03<<7 | 0x21, + 12387 - 12288: jis0208<<14 | 0x03<<7 | 0x22, + 12388 - 12288: jis0208<<14 | 0x03<<7 | 0x23, + 12389 - 12288: jis0208<<14 | 0x03<<7 | 0x24, + 12390 - 12288: jis0208<<14 | 0x03<<7 | 0x25, + 12391 - 12288: jis0208<<14 | 0x03<<7 | 0x26, + 12392 - 12288: jis0208<<14 | 0x03<<7 | 0x27, + 12393 - 12288: jis0208<<14 | 0x03<<7 | 0x28, + 12394 - 12288: jis0208<<14 | 0x03<<7 | 0x29, + 12395 - 12288: jis0208<<14 | 0x03<<7 | 0x2A, + 12396 - 12288: jis0208<<14 | 0x03<<7 | 0x2B, + 12397 - 12288: jis0208<<14 | 0x03<<7 | 0x2C, + 12398 - 12288: jis0208<<14 | 0x03<<7 | 0x2D, + 12399 - 12288: jis0208<<14 | 0x03<<7 | 0x2E, + 12400 - 12288: jis0208<<14 | 0x03<<7 | 0x2F, + 12401 - 12288: jis0208<<14 | 0x03<<7 | 0x30, + 12402 - 12288: jis0208<<14 | 0x03<<7 | 0x31, + 12403 - 12288: jis0208<<14 | 0x03<<7 | 0x32, + 12404 - 12288: jis0208<<14 | 0x03<<7 | 0x33, + 12405 - 12288: jis0208<<14 | 0x03<<7 | 0x34, + 12406 - 12288: jis0208<<14 | 0x03<<7 | 0x35, + 12407 - 12288: jis0208<<14 | 0x03<<7 | 0x36, + 12408 - 12288: jis0208<<14 | 0x03<<7 | 0x37, + 12409 - 12288: jis0208<<14 | 0x03<<7 | 0x38, + 12410 - 12288: jis0208<<14 | 0x03<<7 | 0x39, + 12411 - 12288: jis0208<<14 | 0x03<<7 | 0x3A, + 12412 - 12288: jis0208<<14 | 0x03<<7 | 0x3B, + 12413 - 12288: jis0208<<14 | 0x03<<7 | 0x3C, + 12414 - 12288: jis0208<<14 | 0x03<<7 | 0x3D, + 12415 - 12288: jis0208<<14 | 0x03<<7 | 0x3E, + 12416 - 12288: jis0208<<14 | 0x03<<7 | 0x3F, + 12417 - 12288: jis0208<<14 | 0x03<<7 | 0x40, + 12418 - 12288: jis0208<<14 | 0x03<<7 | 0x41, + 12419 - 12288: jis0208<<14 | 0x03<<7 | 0x42, + 12420 - 12288: jis0208<<14 | 0x03<<7 | 0x43, + 12421 - 12288: jis0208<<14 | 0x03<<7 | 0x44, + 12422 - 12288: jis0208<<14 | 0x03<<7 | 0x45, + 12423 - 12288: jis0208<<14 | 0x03<<7 | 0x46, + 12424 - 12288: jis0208<<14 | 0x03<<7 | 0x47, + 12425 - 12288: jis0208<<14 | 0x03<<7 | 0x48, + 12426 - 12288: jis0208<<14 | 0x03<<7 | 0x49, + 12427 - 12288: jis0208<<14 | 0x03<<7 | 0x4A, + 12428 - 12288: jis0208<<14 | 0x03<<7 | 0x4B, + 12429 - 12288: jis0208<<14 | 0x03<<7 | 0x4C, + 12430 - 12288: jis0208<<14 | 0x03<<7 | 0x4D, + 12431 - 12288: jis0208<<14 | 0x03<<7 | 0x4E, + 12432 - 12288: jis0208<<14 | 0x03<<7 | 0x4F, + 12433 - 12288: jis0208<<14 | 0x03<<7 | 0x50, + 12434 - 12288: jis0208<<14 | 0x03<<7 | 0x51, + 12435 - 12288: jis0208<<14 | 0x03<<7 | 0x52, + 12443 - 12288: jis0208<<14 | 0x00<<7 | 0x0A, + 12444 - 12288: jis0208<<14 | 0x00<<7 | 0x0B, + 12445 - 12288: jis0208<<14 | 0x00<<7 | 0x14, + 12446 - 12288: jis0208<<14 | 0x00<<7 | 0x15, + 12449 - 12288: jis0208<<14 | 0x04<<7 | 0x00, + 12450 - 12288: jis0208<<14 | 0x04<<7 | 0x01, + 12451 - 12288: jis0208<<14 | 0x04<<7 | 0x02, + 12452 - 12288: jis0208<<14 | 0x04<<7 | 0x03, + 12453 - 12288: jis0208<<14 | 0x04<<7 | 0x04, + 12454 - 12288: jis0208<<14 | 0x04<<7 | 0x05, + 12455 - 12288: jis0208<<14 | 0x04<<7 | 0x06, + 12456 - 12288: jis0208<<14 | 0x04<<7 | 0x07, + 12457 - 12288: jis0208<<14 | 0x04<<7 | 0x08, + 12458 - 12288: jis0208<<14 | 0x04<<7 | 0x09, + 12459 - 12288: jis0208<<14 | 0x04<<7 | 0x0A, + 12460 - 12288: jis0208<<14 | 0x04<<7 | 0x0B, + 12461 - 12288: jis0208<<14 | 0x04<<7 | 0x0C, + 12462 - 12288: jis0208<<14 | 0x04<<7 | 0x0D, + 12463 - 12288: jis0208<<14 | 0x04<<7 | 0x0E, + 12464 - 12288: jis0208<<14 | 0x04<<7 | 0x0F, + 12465 - 12288: jis0208<<14 | 0x04<<7 | 0x10, + 12466 - 12288: jis0208<<14 | 0x04<<7 | 0x11, + 12467 - 12288: jis0208<<14 | 0x04<<7 | 0x12, + 12468 - 12288: jis0208<<14 | 0x04<<7 | 0x13, + 12469 - 12288: jis0208<<14 | 0x04<<7 | 0x14, + 12470 - 12288: jis0208<<14 | 0x04<<7 | 0x15, + 12471 - 12288: jis0208<<14 | 0x04<<7 | 0x16, + 12472 - 12288: jis0208<<14 | 0x04<<7 | 0x17, + 12473 - 12288: jis0208<<14 | 0x04<<7 | 0x18, + 12474 - 12288: jis0208<<14 | 0x04<<7 | 0x19, + 12475 - 12288: jis0208<<14 | 0x04<<7 | 0x1A, + 12476 - 12288: jis0208<<14 | 0x04<<7 | 0x1B, + 12477 - 12288: jis0208<<14 | 0x04<<7 | 0x1C, + 12478 - 12288: jis0208<<14 | 0x04<<7 | 0x1D, + 12479 - 12288: jis0208<<14 | 0x04<<7 | 0x1E, + 12480 - 12288: jis0208<<14 | 0x04<<7 | 0x1F, + 12481 - 12288: jis0208<<14 | 0x04<<7 | 0x20, + 12482 - 12288: jis0208<<14 | 0x04<<7 | 0x21, + 12483 - 12288: jis0208<<14 | 0x04<<7 | 0x22, + 12484 - 12288: jis0208<<14 | 0x04<<7 | 0x23, + 12485 - 12288: jis0208<<14 | 0x04<<7 | 0x24, + 12486 - 12288: jis0208<<14 | 0x04<<7 | 0x25, + 12487 - 12288: jis0208<<14 | 0x04<<7 | 0x26, + 12488 - 12288: jis0208<<14 | 0x04<<7 | 0x27, + 12489 - 12288: jis0208<<14 | 0x04<<7 | 0x28, + 12490 - 12288: jis0208<<14 | 0x04<<7 | 0x29, + 12491 - 12288: jis0208<<14 | 0x04<<7 | 0x2A, + 12492 - 12288: jis0208<<14 | 0x04<<7 | 0x2B, + 12493 - 12288: jis0208<<14 | 0x04<<7 | 0x2C, + 12494 - 12288: jis0208<<14 | 0x04<<7 | 0x2D, + 12495 - 12288: jis0208<<14 | 0x04<<7 | 0x2E, + 12496 - 12288: jis0208<<14 | 0x04<<7 | 0x2F, + 12497 - 12288: jis0208<<14 | 0x04<<7 | 0x30, + 12498 - 12288: jis0208<<14 | 0x04<<7 | 0x31, + 12499 - 12288: jis0208<<14 | 0x04<<7 | 0x32, + 12500 - 12288: jis0208<<14 | 0x04<<7 | 0x33, + 12501 - 12288: jis0208<<14 | 0x04<<7 | 0x34, + 12502 - 12288: jis0208<<14 | 0x04<<7 | 0x35, + 12503 - 12288: jis0208<<14 | 0x04<<7 | 0x36, + 12504 - 12288: jis0208<<14 | 0x04<<7 | 0x37, + 12505 - 12288: jis0208<<14 | 0x04<<7 | 0x38, + 12506 - 12288: jis0208<<14 | 0x04<<7 | 0x39, + 12507 - 12288: jis0208<<14 | 0x04<<7 | 0x3A, + 12508 - 12288: jis0208<<14 | 0x04<<7 | 0x3B, + 12509 - 12288: jis0208<<14 | 0x04<<7 | 0x3C, + 12510 - 12288: jis0208<<14 | 0x04<<7 | 0x3D, + 12511 - 12288: jis0208<<14 | 0x04<<7 | 0x3E, + 12512 - 12288: jis0208<<14 | 0x04<<7 | 0x3F, + 12513 - 12288: jis0208<<14 | 0x04<<7 | 0x40, + 12514 - 12288: jis0208<<14 | 0x04<<7 | 0x41, + 12515 - 12288: jis0208<<14 | 0x04<<7 | 0x42, + 12516 - 12288: jis0208<<14 | 0x04<<7 | 0x43, + 12517 - 12288: jis0208<<14 | 0x04<<7 | 0x44, + 12518 - 12288: jis0208<<14 | 0x04<<7 | 0x45, + 12519 - 12288: jis0208<<14 | 0x04<<7 | 0x46, + 12520 - 12288: jis0208<<14 | 0x04<<7 | 0x47, + 12521 - 12288: jis0208<<14 | 0x04<<7 | 0x48, + 12522 - 12288: jis0208<<14 | 0x04<<7 | 0x49, + 12523 - 12288: jis0208<<14 | 0x04<<7 | 0x4A, + 12524 - 12288: jis0208<<14 | 0x04<<7 | 0x4B, + 12525 - 12288: jis0208<<14 | 0x04<<7 | 0x4C, + 12526 - 12288: jis0208<<14 | 0x04<<7 | 0x4D, + 12527 - 12288: jis0208<<14 | 0x04<<7 | 0x4E, + 12528 - 12288: jis0208<<14 | 0x04<<7 | 0x4F, + 12529 - 12288: jis0208<<14 | 0x04<<7 | 0x50, + 12530 - 12288: jis0208<<14 | 0x04<<7 | 0x51, + 12531 - 12288: jis0208<<14 | 0x04<<7 | 0x52, + 12532 - 12288: jis0208<<14 | 0x04<<7 | 0x53, + 12533 - 12288: jis0208<<14 | 0x04<<7 | 0x54, + 12534 - 12288: jis0208<<14 | 0x04<<7 | 0x55, + 12539 - 12288: jis0208<<14 | 0x00<<7 | 0x05, + 12540 - 12288: jis0208<<14 | 0x00<<7 | 0x1B, + 12541 - 12288: jis0208<<14 | 0x00<<7 | 0x12, + 12542 - 12288: jis0208<<14 | 0x00<<7 | 0x13, + 12849 - 12288: jis0208<<14 | 0x0C<<7 | 0x49, + 12850 - 12288: jis0208<<14 | 0x0C<<7 | 0x4A, + 12857 - 12288: jis0208<<14 | 0x0C<<7 | 0x4B, + 12964 - 12288: jis0208<<14 | 0x0C<<7 | 0x44, + 12965 - 12288: jis0208<<14 | 0x0C<<7 | 0x45, + 12966 - 12288: jis0208<<14 | 0x0C<<7 | 0x46, + 12967 - 12288: jis0208<<14 | 0x0C<<7 | 0x47, + 12968 - 12288: jis0208<<14 | 0x0C<<7 | 0x48, + 13059 - 12288: jis0208<<14 | 0x0C<<7 | 0x25, + 13069 - 12288: jis0208<<14 | 0x0C<<7 | 0x29, + 13076 - 12288: jis0208<<14 | 0x0C<<7 | 0x20, + 13080 - 12288: jis0208<<14 | 0x0C<<7 | 0x23, + 13090 - 12288: jis0208<<14 | 0x0C<<7 | 0x21, + 13091 - 12288: jis0208<<14 | 0x0C<<7 | 0x2B, + 13094 - 12288: jis0208<<14 | 0x0C<<7 | 0x2A, + 13095 - 12288: jis0208<<14 | 0x0C<<7 | 0x24, + 13099 - 12288: jis0208<<14 | 0x0C<<7 | 0x2C, + 13110 - 12288: jis0208<<14 | 0x0C<<7 | 0x26, + 13115 - 12288: jis0208<<14 | 0x0C<<7 | 0x2E, + 13129 - 12288: jis0208<<14 | 0x0C<<7 | 0x1F, + 13130 - 12288: jis0208<<14 | 0x0C<<7 | 0x2D, + 13133 - 12288: jis0208<<14 | 0x0C<<7 | 0x22, + 13137 - 12288: jis0208<<14 | 0x0C<<7 | 0x27, + 13143 - 12288: jis0208<<14 | 0x0C<<7 | 0x28, + 13179 - 12288: jis0208<<14 | 0x0C<<7 | 0x3E, + 13180 - 12288: jis0208<<14 | 0x0C<<7 | 0x4E, + 13181 - 12288: jis0208<<14 | 0x0C<<7 | 0x4D, + 13182 - 12288: jis0208<<14 | 0x0C<<7 | 0x4C, + 13198 - 12288: jis0208<<14 | 0x0C<<7 | 0x32, + 13199 - 12288: jis0208<<14 | 0x0C<<7 | 0x33, + 13212 - 12288: jis0208<<14 | 0x0C<<7 | 0x2F, + 13213 - 12288: jis0208<<14 | 0x0C<<7 | 0x30, + 13214 - 12288: jis0208<<14 | 0x0C<<7 | 0x31, + 13217 - 12288: jis0208<<14 | 0x0C<<7 | 0x35, + 13252 - 12288: jis0208<<14 | 0x0C<<7 | 0x34, + 13261 - 12288: jis0208<<14 | 0x0C<<7 | 0x42, +} + +const encode3Low, encode3High = 161, 1120 + +var encode3 = [...]uint16{ + 161 - 161: jis0212<<14 | 0x01<<7 | 0x21, + 164 - 161: jis0212<<14 | 0x01<<7 | 0x4F, + 166 - 161: jis0212<<14 | 0x01<<7 | 0x22, + 167 - 161: jis0208<<14 | 0x00<<7 | 0x57, + 168 - 161: jis0208<<14 | 0x00<<7 | 0x0E, + 169 - 161: jis0212<<14 | 0x01<<7 | 0x4C, + 170 - 161: jis0212<<14 | 0x01<<7 | 0x4B, + 174 - 161: jis0212<<14 | 0x01<<7 | 0x4D, + 175 - 161: jis0212<<14 | 0x01<<7 | 0x13, + 176 - 161: jis0208<<14 | 0x00<<7 | 0x4A, + 177 - 161: jis0208<<14 | 0x00<<7 | 0x3D, + 180 - 161: jis0208<<14 | 0x00<<7 | 0x0C, + 182 - 161: jis0208<<14 | 0x01<<7 | 0x58, + 184 - 161: jis0212<<14 | 0x01<<7 | 0x10, + 186 - 161: jis0212<<14 | 0x01<<7 | 0x4A, + 191 - 161: jis0212<<14 | 0x01<<7 | 0x23, + 192 - 161: jis0212<<14 | 0x09<<7 | 0x01, + 193 - 161: jis0212<<14 | 0x09<<7 | 0x00, + 194 - 161: jis0212<<14 | 0x09<<7 | 0x03, + 195 - 161: jis0212<<14 | 0x09<<7 | 0x09, + 196 - 161: jis0212<<14 | 0x09<<7 | 0x02, + 197 - 161: jis0212<<14 | 0x09<<7 | 0x08, + 198 - 161: jis0212<<14 | 0x08<<7 | 0x00, + 199 - 161: jis0212<<14 | 0x09<<7 | 0x0D, + 200 - 161: jis0212<<14 | 0x09<<7 | 0x11, + 201 - 161: jis0212<<14 | 0x09<<7 | 0x10, + 202 - 161: jis0212<<14 | 0x09<<7 | 0x13, + 203 - 161: jis0212<<14 | 0x09<<7 | 0x12, + 204 - 161: jis0212<<14 | 0x09<<7 | 0x1F, + 205 - 161: jis0212<<14 | 0x09<<7 | 0x1E, + 206 - 161: jis0212<<14 | 0x09<<7 | 0x21, + 207 - 161: jis0212<<14 | 0x09<<7 | 0x20, + 209 - 161: jis0212<<14 | 0x09<<7 | 0x2F, + 210 - 161: jis0212<<14 | 0x09<<7 | 0x31, + 211 - 161: jis0212<<14 | 0x09<<7 | 0x30, + 212 - 161: jis0212<<14 | 0x09<<7 | 0x33, + 213 - 161: jis0212<<14 | 0x09<<7 | 0x37, + 214 - 161: jis0212<<14 | 0x09<<7 | 0x32, + 215 - 161: jis0208<<14 | 0x00<<7 | 0x3E, + 216 - 161: jis0212<<14 | 0x08<<7 | 0x0B, + 217 - 161: jis0212<<14 | 0x09<<7 | 0x42, + 218 - 161: jis0212<<14 | 0x09<<7 | 0x41, + 219 - 161: jis0212<<14 | 0x09<<7 | 0x44, + 220 - 161: jis0212<<14 | 0x09<<7 | 0x43, + 221 - 161: jis0212<<14 | 0x09<<7 | 0x51, + 222 - 161: jis0212<<14 | 0x08<<7 | 0x0F, + 223 - 161: jis0212<<14 | 0x08<<7 | 0x2D, + 224 - 161: jis0212<<14 | 0x0A<<7 | 0x01, + 225 - 161: jis0212<<14 | 0x0A<<7 | 0x00, + 226 - 161: jis0212<<14 | 0x0A<<7 | 0x03, + 227 - 161: jis0212<<14 | 0x0A<<7 | 0x09, + 228 - 161: jis0212<<14 | 0x0A<<7 | 0x02, + 229 - 161: jis0212<<14 | 0x0A<<7 | 0x08, + 230 - 161: jis0212<<14 | 0x08<<7 | 0x20, + 231 - 161: jis0212<<14 | 0x0A<<7 | 0x0D, + 232 - 161: jis0212<<14 | 0x0A<<7 | 0x11, + 233 - 161: jis0212<<14 | 0x0A<<7 | 0x10, + 234 - 161: jis0212<<14 | 0x0A<<7 | 0x13, + 235 - 161: jis0212<<14 | 0x0A<<7 | 0x12, + 236 - 161: jis0212<<14 | 0x0A<<7 | 0x1F, + 237 - 161: jis0212<<14 | 0x0A<<7 | 0x1E, + 238 - 161: jis0212<<14 | 0x0A<<7 | 0x21, + 239 - 161: jis0212<<14 | 0x0A<<7 | 0x20, + 240 - 161: jis0212<<14 | 0x08<<7 | 0x22, + 241 - 161: jis0212<<14 | 0x0A<<7 | 0x2F, + 242 - 161: jis0212<<14 | 0x0A<<7 | 0x31, + 243 - 161: jis0212<<14 | 0x0A<<7 | 0x30, + 244 - 161: jis0212<<14 | 0x0A<<7 | 0x33, + 245 - 161: jis0212<<14 | 0x0A<<7 | 0x37, + 246 - 161: jis0212<<14 | 0x0A<<7 | 0x32, + 247 - 161: jis0208<<14 | 0x00<<7 | 0x3F, + 248 - 161: jis0212<<14 | 0x08<<7 | 0x2B, + 249 - 161: jis0212<<14 | 0x0A<<7 | 0x42, + 250 - 161: jis0212<<14 | 0x0A<<7 | 0x41, + 251 - 161: jis0212<<14 | 0x0A<<7 | 0x44, + 252 - 161: jis0212<<14 | 0x0A<<7 | 0x43, + 253 - 161: jis0212<<14 | 0x0A<<7 | 0x51, + 254 - 161: jis0212<<14 | 0x08<<7 | 0x2F, + 255 - 161: jis0212<<14 | 0x0A<<7 | 0x52, + 256 - 161: jis0212<<14 | 0x09<<7 | 0x06, + 257 - 161: jis0212<<14 | 0x0A<<7 | 0x06, + 258 - 161: jis0212<<14 | 0x09<<7 | 0x04, + 259 - 161: jis0212<<14 | 0x0A<<7 | 0x04, + 260 - 161: jis0212<<14 | 0x09<<7 | 0x07, + 261 - 161: jis0212<<14 | 0x0A<<7 | 0x07, + 262 - 161: jis0212<<14 | 0x09<<7 | 0x0A, + 263 - 161: jis0212<<14 | 0x0A<<7 | 0x0A, + 264 - 161: jis0212<<14 | 0x09<<7 | 0x0B, + 265 - 161: jis0212<<14 | 0x0A<<7 | 0x0B, + 266 - 161: jis0212<<14 | 0x09<<7 | 0x0E, + 267 - 161: jis0212<<14 | 0x0A<<7 | 0x0E, + 268 - 161: jis0212<<14 | 0x09<<7 | 0x0C, + 269 - 161: jis0212<<14 | 0x0A<<7 | 0x0C, + 270 - 161: jis0212<<14 | 0x09<<7 | 0x0F, + 271 - 161: jis0212<<14 | 0x0A<<7 | 0x0F, + 272 - 161: jis0212<<14 | 0x08<<7 | 0x01, + 273 - 161: jis0212<<14 | 0x08<<7 | 0x21, + 274 - 161: jis0212<<14 | 0x09<<7 | 0x16, + 275 - 161: jis0212<<14 | 0x0A<<7 | 0x16, + 278 - 161: jis0212<<14 | 0x09<<7 | 0x15, + 279 - 161: jis0212<<14 | 0x0A<<7 | 0x15, + 280 - 161: jis0212<<14 | 0x09<<7 | 0x17, + 281 - 161: jis0212<<14 | 0x0A<<7 | 0x17, + 282 - 161: jis0212<<14 | 0x09<<7 | 0x14, + 283 - 161: jis0212<<14 | 0x0A<<7 | 0x14, + 284 - 161: jis0212<<14 | 0x09<<7 | 0x19, + 285 - 161: jis0212<<14 | 0x0A<<7 | 0x19, + 286 - 161: jis0212<<14 | 0x09<<7 | 0x1A, + 287 - 161: jis0212<<14 | 0x0A<<7 | 0x1A, + 288 - 161: jis0212<<14 | 0x09<<7 | 0x1C, + 289 - 161: jis0212<<14 | 0x0A<<7 | 0x1C, + 290 - 161: jis0212<<14 | 0x09<<7 | 0x1B, + 292 - 161: jis0212<<14 | 0x09<<7 | 0x1D, + 293 - 161: jis0212<<14 | 0x0A<<7 | 0x1D, + 294 - 161: jis0212<<14 | 0x08<<7 | 0x03, + 295 - 161: jis0212<<14 | 0x08<<7 | 0x23, + 296 - 161: jis0212<<14 | 0x09<<7 | 0x26, + 297 - 161: jis0212<<14 | 0x0A<<7 | 0x26, + 298 - 161: jis0212<<14 | 0x09<<7 | 0x24, + 299 - 161: jis0212<<14 | 0x0A<<7 | 0x24, + 302 - 161: jis0212<<14 | 0x09<<7 | 0x25, + 303 - 161: jis0212<<14 | 0x0A<<7 | 0x25, + 304 - 161: jis0212<<14 | 0x09<<7 | 0x23, + 305 - 161: jis0212<<14 | 0x08<<7 | 0x24, + 306 - 161: jis0212<<14 | 0x08<<7 | 0x05, + 307 - 161: jis0212<<14 | 0x08<<7 | 0x25, + 308 - 161: jis0212<<14 | 0x09<<7 | 0x27, + 309 - 161: jis0212<<14 | 0x0A<<7 | 0x27, + 310 - 161: jis0212<<14 | 0x09<<7 | 0x28, + 311 - 161: jis0212<<14 | 0x0A<<7 | 0x28, + 312 - 161: jis0212<<14 | 0x08<<7 | 0x26, + 313 - 161: jis0212<<14 | 0x09<<7 | 0x29, + 314 - 161: jis0212<<14 | 0x0A<<7 | 0x29, + 315 - 161: jis0212<<14 | 0x09<<7 | 0x2B, + 316 - 161: jis0212<<14 | 0x0A<<7 | 0x2B, + 317 - 161: jis0212<<14 | 0x09<<7 | 0x2A, + 318 - 161: jis0212<<14 | 0x0A<<7 | 0x2A, + 319 - 161: jis0212<<14 | 0x08<<7 | 0x08, + 320 - 161: jis0212<<14 | 0x08<<7 | 0x28, + 321 - 161: jis0212<<14 | 0x08<<7 | 0x07, + 322 - 161: jis0212<<14 | 0x08<<7 | 0x27, + 323 - 161: jis0212<<14 | 0x09<<7 | 0x2C, + 324 - 161: jis0212<<14 | 0x0A<<7 | 0x2C, + 325 - 161: jis0212<<14 | 0x09<<7 | 0x2E, + 326 - 161: jis0212<<14 | 0x0A<<7 | 0x2E, + 327 - 161: jis0212<<14 | 0x09<<7 | 0x2D, + 328 - 161: jis0212<<14 | 0x0A<<7 | 0x2D, + 329 - 161: jis0212<<14 | 0x08<<7 | 0x29, + 330 - 161: jis0212<<14 | 0x08<<7 | 0x0A, + 331 - 161: jis0212<<14 | 0x08<<7 | 0x2A, + 332 - 161: jis0212<<14 | 0x09<<7 | 0x36, + 333 - 161: jis0212<<14 | 0x0A<<7 | 0x36, + 336 - 161: jis0212<<14 | 0x09<<7 | 0x35, + 337 - 161: jis0212<<14 | 0x0A<<7 | 0x35, + 338 - 161: jis0212<<14 | 0x08<<7 | 0x0C, + 339 - 161: jis0212<<14 | 0x08<<7 | 0x2C, + 340 - 161: jis0212<<14 | 0x09<<7 | 0x38, + 341 - 161: jis0212<<14 | 0x0A<<7 | 0x38, + 342 - 161: jis0212<<14 | 0x09<<7 | 0x3A, + 343 - 161: jis0212<<14 | 0x0A<<7 | 0x3A, + 344 - 161: jis0212<<14 | 0x09<<7 | 0x39, + 345 - 161: jis0212<<14 | 0x0A<<7 | 0x39, + 346 - 161: jis0212<<14 | 0x09<<7 | 0x3B, + 347 - 161: jis0212<<14 | 0x0A<<7 | 0x3B, + 348 - 161: jis0212<<14 | 0x09<<7 | 0x3C, + 349 - 161: jis0212<<14 | 0x0A<<7 | 0x3C, + 350 - 161: jis0212<<14 | 0x09<<7 | 0x3E, + 351 - 161: jis0212<<14 | 0x0A<<7 | 0x3E, + 352 - 161: jis0212<<14 | 0x09<<7 | 0x3D, + 353 - 161: jis0212<<14 | 0x0A<<7 | 0x3D, + 354 - 161: jis0212<<14 | 0x09<<7 | 0x40, + 355 - 161: jis0212<<14 | 0x0A<<7 | 0x40, + 356 - 161: jis0212<<14 | 0x09<<7 | 0x3F, + 357 - 161: jis0212<<14 | 0x0A<<7 | 0x3F, + 358 - 161: jis0212<<14 | 0x08<<7 | 0x0E, + 359 - 161: jis0212<<14 | 0x08<<7 | 0x2E, + 360 - 161: jis0212<<14 | 0x09<<7 | 0x4B, + 361 - 161: jis0212<<14 | 0x0A<<7 | 0x4B, + 362 - 161: jis0212<<14 | 0x09<<7 | 0x48, + 363 - 161: jis0212<<14 | 0x0A<<7 | 0x48, + 364 - 161: jis0212<<14 | 0x09<<7 | 0x45, + 365 - 161: jis0212<<14 | 0x0A<<7 | 0x45, + 366 - 161: jis0212<<14 | 0x09<<7 | 0x4A, + 367 - 161: jis0212<<14 | 0x0A<<7 | 0x4A, + 368 - 161: jis0212<<14 | 0x09<<7 | 0x47, + 369 - 161: jis0212<<14 | 0x0A<<7 | 0x47, + 370 - 161: jis0212<<14 | 0x09<<7 | 0x49, + 371 - 161: jis0212<<14 | 0x0A<<7 | 0x49, + 372 - 161: jis0212<<14 | 0x09<<7 | 0x50, + 373 - 161: jis0212<<14 | 0x0A<<7 | 0x50, + 374 - 161: jis0212<<14 | 0x09<<7 | 0x53, + 375 - 161: jis0212<<14 | 0x0A<<7 | 0x53, + 376 - 161: jis0212<<14 | 0x09<<7 | 0x52, + 377 - 161: jis0212<<14 | 0x09<<7 | 0x54, + 378 - 161: jis0212<<14 | 0x0A<<7 | 0x54, + 379 - 161: jis0212<<14 | 0x09<<7 | 0x56, + 380 - 161: jis0212<<14 | 0x0A<<7 | 0x56, + 381 - 161: jis0212<<14 | 0x09<<7 | 0x55, + 382 - 161: jis0212<<14 | 0x0A<<7 | 0x55, + 461 - 161: jis0212<<14 | 0x09<<7 | 0x05, + 462 - 161: jis0212<<14 | 0x0A<<7 | 0x05, + 463 - 161: jis0212<<14 | 0x09<<7 | 0x22, + 464 - 161: jis0212<<14 | 0x0A<<7 | 0x22, + 465 - 161: jis0212<<14 | 0x09<<7 | 0x34, + 466 - 161: jis0212<<14 | 0x0A<<7 | 0x34, + 467 - 161: jis0212<<14 | 0x09<<7 | 0x46, + 468 - 161: jis0212<<14 | 0x0A<<7 | 0x46, + 469 - 161: jis0212<<14 | 0x09<<7 | 0x4F, + 470 - 161: jis0212<<14 | 0x0A<<7 | 0x4F, + 471 - 161: jis0212<<14 | 0x09<<7 | 0x4C, + 472 - 161: jis0212<<14 | 0x0A<<7 | 0x4C, + 473 - 161: jis0212<<14 | 0x09<<7 | 0x4E, + 474 - 161: jis0212<<14 | 0x0A<<7 | 0x4E, + 475 - 161: jis0212<<14 | 0x09<<7 | 0x4D, + 476 - 161: jis0212<<14 | 0x0A<<7 | 0x4D, + 501 - 161: jis0212<<14 | 0x0A<<7 | 0x18, + 711 - 161: jis0212<<14 | 0x01<<7 | 0x0F, + 728 - 161: jis0212<<14 | 0x01<<7 | 0x0E, + 729 - 161: jis0212<<14 | 0x01<<7 | 0x11, + 730 - 161: jis0212<<14 | 0x01<<7 | 0x15, + 731 - 161: jis0212<<14 | 0x01<<7 | 0x14, + 733 - 161: jis0212<<14 | 0x01<<7 | 0x12, + 900 - 161: jis0212<<14 | 0x01<<7 | 0x17, + 901 - 161: jis0212<<14 | 0x01<<7 | 0x18, + 902 - 161: jis0212<<14 | 0x05<<7 | 0x40, + 904 - 161: jis0212<<14 | 0x05<<7 | 0x41, + 905 - 161: jis0212<<14 | 0x05<<7 | 0x42, + 906 - 161: jis0212<<14 | 0x05<<7 | 0x43, + 908 - 161: jis0212<<14 | 0x05<<7 | 0x46, + 910 - 161: jis0212<<14 | 0x05<<7 | 0x48, + 911 - 161: jis0212<<14 | 0x05<<7 | 0x4B, + 912 - 161: jis0212<<14 | 0x05<<7 | 0x55, + 913 - 161: jis0208<<14 | 0x05<<7 | 0x00, + 914 - 161: jis0208<<14 | 0x05<<7 | 0x01, + 915 - 161: jis0208<<14 | 0x05<<7 | 0x02, + 916 - 161: jis0208<<14 | 0x05<<7 | 0x03, + 917 - 161: jis0208<<14 | 0x05<<7 | 0x04, + 918 - 161: jis0208<<14 | 0x05<<7 | 0x05, + 919 - 161: jis0208<<14 | 0x05<<7 | 0x06, + 920 - 161: jis0208<<14 | 0x05<<7 | 0x07, + 921 - 161: jis0208<<14 | 0x05<<7 | 0x08, + 922 - 161: jis0208<<14 | 0x05<<7 | 0x09, + 923 - 161: jis0208<<14 | 0x05<<7 | 0x0A, + 924 - 161: jis0208<<14 | 0x05<<7 | 0x0B, + 925 - 161: jis0208<<14 | 0x05<<7 | 0x0C, + 926 - 161: jis0208<<14 | 0x05<<7 | 0x0D, + 927 - 161: jis0208<<14 | 0x05<<7 | 0x0E, + 928 - 161: jis0208<<14 | 0x05<<7 | 0x0F, + 929 - 161: jis0208<<14 | 0x05<<7 | 0x10, + 931 - 161: jis0208<<14 | 0x05<<7 | 0x11, + 932 - 161: jis0208<<14 | 0x05<<7 | 0x12, + 933 - 161: jis0208<<14 | 0x05<<7 | 0x13, + 934 - 161: jis0208<<14 | 0x05<<7 | 0x14, + 935 - 161: jis0208<<14 | 0x05<<7 | 0x15, + 936 - 161: jis0208<<14 | 0x05<<7 | 0x16, + 937 - 161: jis0208<<14 | 0x05<<7 | 0x17, + 938 - 161: jis0212<<14 | 0x05<<7 | 0x44, + 939 - 161: jis0212<<14 | 0x05<<7 | 0x49, + 940 - 161: jis0212<<14 | 0x05<<7 | 0x50, + 941 - 161: jis0212<<14 | 0x05<<7 | 0x51, + 942 - 161: jis0212<<14 | 0x05<<7 | 0x52, + 943 - 161: jis0212<<14 | 0x05<<7 | 0x53, + 944 - 161: jis0212<<14 | 0x05<<7 | 0x5A, + 945 - 161: jis0208<<14 | 0x05<<7 | 0x20, + 946 - 161: jis0208<<14 | 0x05<<7 | 0x21, + 947 - 161: jis0208<<14 | 0x05<<7 | 0x22, + 948 - 161: jis0208<<14 | 0x05<<7 | 0x23, + 949 - 161: jis0208<<14 | 0x05<<7 | 0x24, + 950 - 161: jis0208<<14 | 0x05<<7 | 0x25, + 951 - 161: jis0208<<14 | 0x05<<7 | 0x26, + 952 - 161: jis0208<<14 | 0x05<<7 | 0x27, + 953 - 161: jis0208<<14 | 0x05<<7 | 0x28, + 954 - 161: jis0208<<14 | 0x05<<7 | 0x29, + 955 - 161: jis0208<<14 | 0x05<<7 | 0x2A, + 956 - 161: jis0208<<14 | 0x05<<7 | 0x2B, + 957 - 161: jis0208<<14 | 0x05<<7 | 0x2C, + 958 - 161: jis0208<<14 | 0x05<<7 | 0x2D, + 959 - 161: jis0208<<14 | 0x05<<7 | 0x2E, + 960 - 161: jis0208<<14 | 0x05<<7 | 0x2F, + 961 - 161: jis0208<<14 | 0x05<<7 | 0x30, + 962 - 161: jis0212<<14 | 0x05<<7 | 0x57, + 963 - 161: jis0208<<14 | 0x05<<7 | 0x31, + 964 - 161: jis0208<<14 | 0x05<<7 | 0x32, + 965 - 161: jis0208<<14 | 0x05<<7 | 0x33, + 966 - 161: jis0208<<14 | 0x05<<7 | 0x34, + 967 - 161: jis0208<<14 | 0x05<<7 | 0x35, + 968 - 161: jis0208<<14 | 0x05<<7 | 0x36, + 969 - 161: jis0208<<14 | 0x05<<7 | 0x37, + 970 - 161: jis0212<<14 | 0x05<<7 | 0x54, + 971 - 161: jis0212<<14 | 0x05<<7 | 0x59, + 972 - 161: jis0212<<14 | 0x05<<7 | 0x56, + 973 - 161: jis0212<<14 | 0x05<<7 | 0x58, + 974 - 161: jis0212<<14 | 0x05<<7 | 0x5B, + 1025 - 161: jis0208<<14 | 0x06<<7 | 0x06, + 1026 - 161: jis0212<<14 | 0x06<<7 | 0x21, + 1027 - 161: jis0212<<14 | 0x06<<7 | 0x22, + 1028 - 161: jis0212<<14 | 0x06<<7 | 0x23, + 1029 - 161: jis0212<<14 | 0x06<<7 | 0x24, + 1030 - 161: jis0212<<14 | 0x06<<7 | 0x25, + 1031 - 161: jis0212<<14 | 0x06<<7 | 0x26, + 1032 - 161: jis0212<<14 | 0x06<<7 | 0x27, + 1033 - 161: jis0212<<14 | 0x06<<7 | 0x28, + 1034 - 161: jis0212<<14 | 0x06<<7 | 0x29, + 1035 - 161: jis0212<<14 | 0x06<<7 | 0x2A, + 1036 - 161: jis0212<<14 | 0x06<<7 | 0x2B, + 1038 - 161: jis0212<<14 | 0x06<<7 | 0x2C, + 1039 - 161: jis0212<<14 | 0x06<<7 | 0x2D, + 1040 - 161: jis0208<<14 | 0x06<<7 | 0x00, + 1041 - 161: jis0208<<14 | 0x06<<7 | 0x01, + 1042 - 161: jis0208<<14 | 0x06<<7 | 0x02, + 1043 - 161: jis0208<<14 | 0x06<<7 | 0x03, + 1044 - 161: jis0208<<14 | 0x06<<7 | 0x04, + 1045 - 161: jis0208<<14 | 0x06<<7 | 0x05, + 1046 - 161: jis0208<<14 | 0x06<<7 | 0x07, + 1047 - 161: jis0208<<14 | 0x06<<7 | 0x08, + 1048 - 161: jis0208<<14 | 0x06<<7 | 0x09, + 1049 - 161: jis0208<<14 | 0x06<<7 | 0x0A, + 1050 - 161: jis0208<<14 | 0x06<<7 | 0x0B, + 1051 - 161: jis0208<<14 | 0x06<<7 | 0x0C, + 1052 - 161: jis0208<<14 | 0x06<<7 | 0x0D, + 1053 - 161: jis0208<<14 | 0x06<<7 | 0x0E, + 1054 - 161: jis0208<<14 | 0x06<<7 | 0x0F, + 1055 - 161: jis0208<<14 | 0x06<<7 | 0x10, + 1056 - 161: jis0208<<14 | 0x06<<7 | 0x11, + 1057 - 161: jis0208<<14 | 0x06<<7 | 0x12, + 1058 - 161: jis0208<<14 | 0x06<<7 | 0x13, + 1059 - 161: jis0208<<14 | 0x06<<7 | 0x14, + 1060 - 161: jis0208<<14 | 0x06<<7 | 0x15, + 1061 - 161: jis0208<<14 | 0x06<<7 | 0x16, + 1062 - 161: jis0208<<14 | 0x06<<7 | 0x17, + 1063 - 161: jis0208<<14 | 0x06<<7 | 0x18, + 1064 - 161: jis0208<<14 | 0x06<<7 | 0x19, + 1065 - 161: jis0208<<14 | 0x06<<7 | 0x1A, + 1066 - 161: jis0208<<14 | 0x06<<7 | 0x1B, + 1067 - 161: jis0208<<14 | 0x06<<7 | 0x1C, + 1068 - 161: jis0208<<14 | 0x06<<7 | 0x1D, + 1069 - 161: jis0208<<14 | 0x06<<7 | 0x1E, + 1070 - 161: jis0208<<14 | 0x06<<7 | 0x1F, + 1071 - 161: jis0208<<14 | 0x06<<7 | 0x20, + 1072 - 161: jis0208<<14 | 0x06<<7 | 0x30, + 1073 - 161: jis0208<<14 | 0x06<<7 | 0x31, + 1074 - 161: jis0208<<14 | 0x06<<7 | 0x32, + 1075 - 161: jis0208<<14 | 0x06<<7 | 0x33, + 1076 - 161: jis0208<<14 | 0x06<<7 | 0x34, + 1077 - 161: jis0208<<14 | 0x06<<7 | 0x35, + 1078 - 161: jis0208<<14 | 0x06<<7 | 0x37, + 1079 - 161: jis0208<<14 | 0x06<<7 | 0x38, + 1080 - 161: jis0208<<14 | 0x06<<7 | 0x39, + 1081 - 161: jis0208<<14 | 0x06<<7 | 0x3A, + 1082 - 161: jis0208<<14 | 0x06<<7 | 0x3B, + 1083 - 161: jis0208<<14 | 0x06<<7 | 0x3C, + 1084 - 161: jis0208<<14 | 0x06<<7 | 0x3D, + 1085 - 161: jis0208<<14 | 0x06<<7 | 0x3E, + 1086 - 161: jis0208<<14 | 0x06<<7 | 0x3F, + 1087 - 161: jis0208<<14 | 0x06<<7 | 0x40, + 1088 - 161: jis0208<<14 | 0x06<<7 | 0x41, + 1089 - 161: jis0208<<14 | 0x06<<7 | 0x42, + 1090 - 161: jis0208<<14 | 0x06<<7 | 0x43, + 1091 - 161: jis0208<<14 | 0x06<<7 | 0x44, + 1092 - 161: jis0208<<14 | 0x06<<7 | 0x45, + 1093 - 161: jis0208<<14 | 0x06<<7 | 0x46, + 1094 - 161: jis0208<<14 | 0x06<<7 | 0x47, + 1095 - 161: jis0208<<14 | 0x06<<7 | 0x48, + 1096 - 161: jis0208<<14 | 0x06<<7 | 0x49, + 1097 - 161: jis0208<<14 | 0x06<<7 | 0x4A, + 1098 - 161: jis0208<<14 | 0x06<<7 | 0x4B, + 1099 - 161: jis0208<<14 | 0x06<<7 | 0x4C, + 1100 - 161: jis0208<<14 | 0x06<<7 | 0x4D, + 1101 - 161: jis0208<<14 | 0x06<<7 | 0x4E, + 1102 - 161: jis0208<<14 | 0x06<<7 | 0x4F, + 1103 - 161: jis0208<<14 | 0x06<<7 | 0x50, + 1105 - 161: jis0208<<14 | 0x06<<7 | 0x36, + 1106 - 161: jis0212<<14 | 0x06<<7 | 0x51, + 1107 - 161: jis0212<<14 | 0x06<<7 | 0x52, + 1108 - 161: jis0212<<14 | 0x06<<7 | 0x53, + 1109 - 161: jis0212<<14 | 0x06<<7 | 0x54, + 1110 - 161: jis0212<<14 | 0x06<<7 | 0x55, + 1111 - 161: jis0212<<14 | 0x06<<7 | 0x56, + 1112 - 161: jis0212<<14 | 0x06<<7 | 0x57, + 1113 - 161: jis0212<<14 | 0x06<<7 | 0x58, + 1114 - 161: jis0212<<14 | 0x06<<7 | 0x59, + 1115 - 161: jis0212<<14 | 0x06<<7 | 0x5A, + 1116 - 161: jis0212<<14 | 0x06<<7 | 0x5B, + 1118 - 161: jis0212<<14 | 0x06<<7 | 0x5C, + 1119 - 161: jis0212<<14 | 0x06<<7 | 0x5D, +} + +const encode4Low, encode4High = 63785, 64046 + +var encode4 = [...]uint16{ + 63785 - 63785: jis0208<<14 | 0x59<<7 | 0x25, + 63964 - 63785: jis0208<<14 | 0x5B<<7 | 0x2E, + 64014 - 63785: jis0208<<14 | 0x58<<7 | 0x33, + 64015 - 63785: jis0208<<14 | 0x58<<7 | 0x3E, + 64016 - 63785: jis0208<<14 | 0x58<<7 | 0x3F, + 64017 - 63785: jis0208<<14 | 0x58<<7 | 0x54, + 64018 - 63785: jis0208<<14 | 0x59<<7 | 0x1D, + 64019 - 63785: jis0208<<14 | 0x59<<7 | 0x2D, + 64020 - 63785: jis0208<<14 | 0x59<<7 | 0x2F, + 64021 - 63785: jis0208<<14 | 0x59<<7 | 0x5A, + 64022 - 63785: jis0208<<14 | 0x5A<<7 | 0x02, + 64023 - 63785: jis0208<<14 | 0x5A<<7 | 0x19, + 64024 - 63785: jis0208<<14 | 0x5A<<7 | 0x21, + 64025 - 63785: jis0208<<14 | 0x5A<<7 | 0x22, + 64026 - 63785: jis0208<<14 | 0x5A<<7 | 0x23, + 64027 - 63785: jis0208<<14 | 0x5A<<7 | 0x25, + 64028 - 63785: jis0208<<14 | 0x5A<<7 | 0x29, + 64029 - 63785: jis0208<<14 | 0x5A<<7 | 0x2C, + 64030 - 63785: jis0208<<14 | 0x5A<<7 | 0x35, + 64031 - 63785: jis0208<<14 | 0x5A<<7 | 0x40, + 64032 - 63785: jis0208<<14 | 0x5A<<7 | 0x42, + 64033 - 63785: jis0208<<14 | 0x5A<<7 | 0x43, + 64034 - 63785: jis0208<<14 | 0x5A<<7 | 0x4C, + 64035 - 63785: jis0208<<14 | 0x5A<<7 | 0x54, + 64036 - 63785: jis0208<<14 | 0x5A<<7 | 0x56, + 64037 - 63785: jis0208<<14 | 0x5A<<7 | 0x57, + 64038 - 63785: jis0208<<14 | 0x5A<<7 | 0x5A, + 64039 - 63785: jis0208<<14 | 0x5B<<7 | 0x18, + 64040 - 63785: jis0208<<14 | 0x5B<<7 | 0x1F, + 64041 - 63785: jis0208<<14 | 0x5B<<7 | 0x2F, + 64042 - 63785: jis0208<<14 | 0x5B<<7 | 0x3B, + 64043 - 63785: jis0208<<14 | 0x5B<<7 | 0x3C, + 64044 - 63785: jis0208<<14 | 0x5B<<7 | 0x3E, + 64045 - 63785: jis0208<<14 | 0x5B<<7 | 0x4B, +} + +const encode5Low, encode5High = 65281, 65510 + +var encode5 = [...]uint16{ + 65281 - 65281: jis0208<<14 | 0x00<<7 | 0x09, + 65282 - 65281: jis0208<<14 | 0x5B<<7 | 0x5D, + 65283 - 65281: jis0208<<14 | 0x00<<7 | 0x53, + 65284 - 65281: jis0208<<14 | 0x00<<7 | 0x4F, + 65285 - 65281: jis0208<<14 | 0x00<<7 | 0x52, + 65286 - 65281: jis0208<<14 | 0x00<<7 | 0x54, + 65287 - 65281: jis0208<<14 | 0x5B<<7 | 0x5C, + 65288 - 65281: jis0208<<14 | 0x00<<7 | 0x29, + 65289 - 65281: jis0208<<14 | 0x00<<7 | 0x2A, + 65290 - 65281: jis0208<<14 | 0x00<<7 | 0x55, + 65291 - 65281: jis0208<<14 | 0x00<<7 | 0x3B, + 65292 - 65281: jis0208<<14 | 0x00<<7 | 0x03, + 65293 - 65281: jis0208<<14 | 0x00<<7 | 0x3C, + 65294 - 65281: jis0208<<14 | 0x00<<7 | 0x04, + 65295 - 65281: jis0208<<14 | 0x00<<7 | 0x1E, + 65296 - 65281: jis0208<<14 | 0x02<<7 | 0x0F, + 65297 - 65281: jis0208<<14 | 0x02<<7 | 0x10, + 65298 - 65281: jis0208<<14 | 0x02<<7 | 0x11, + 65299 - 65281: jis0208<<14 | 0x02<<7 | 0x12, + 65300 - 65281: jis0208<<14 | 0x02<<7 | 0x13, + 65301 - 65281: jis0208<<14 | 0x02<<7 | 0x14, + 65302 - 65281: jis0208<<14 | 0x02<<7 | 0x15, + 65303 - 65281: jis0208<<14 | 0x02<<7 | 0x16, + 65304 - 65281: jis0208<<14 | 0x02<<7 | 0x17, + 65305 - 65281: jis0208<<14 | 0x02<<7 | 0x18, + 65306 - 65281: jis0208<<14 | 0x00<<7 | 0x06, + 65307 - 65281: jis0208<<14 | 0x00<<7 | 0x07, + 65308 - 65281: jis0208<<14 | 0x00<<7 | 0x42, + 65309 - 65281: jis0208<<14 | 0x00<<7 | 0x40, + 65310 - 65281: jis0208<<14 | 0x00<<7 | 0x43, + 65311 - 65281: jis0208<<14 | 0x00<<7 | 0x08, + 65312 - 65281: jis0208<<14 | 0x00<<7 | 0x56, + 65313 - 65281: jis0208<<14 | 0x02<<7 | 0x20, + 65314 - 65281: jis0208<<14 | 0x02<<7 | 0x21, + 65315 - 65281: jis0208<<14 | 0x02<<7 | 0x22, + 65316 - 65281: jis0208<<14 | 0x02<<7 | 0x23, + 65317 - 65281: jis0208<<14 | 0x02<<7 | 0x24, + 65318 - 65281: jis0208<<14 | 0x02<<7 | 0x25, + 65319 - 65281: jis0208<<14 | 0x02<<7 | 0x26, + 65320 - 65281: jis0208<<14 | 0x02<<7 | 0x27, + 65321 - 65281: jis0208<<14 | 0x02<<7 | 0x28, + 65322 - 65281: jis0208<<14 | 0x02<<7 | 0x29, + 65323 - 65281: jis0208<<14 | 0x02<<7 | 0x2A, + 65324 - 65281: jis0208<<14 | 0x02<<7 | 0x2B, + 65325 - 65281: jis0208<<14 | 0x02<<7 | 0x2C, + 65326 - 65281: jis0208<<14 | 0x02<<7 | 0x2D, + 65327 - 65281: jis0208<<14 | 0x02<<7 | 0x2E, + 65328 - 65281: jis0208<<14 | 0x02<<7 | 0x2F, + 65329 - 65281: jis0208<<14 | 0x02<<7 | 0x30, + 65330 - 65281: jis0208<<14 | 0x02<<7 | 0x31, + 65331 - 65281: jis0208<<14 | 0x02<<7 | 0x32, + 65332 - 65281: jis0208<<14 | 0x02<<7 | 0x33, + 65333 - 65281: jis0208<<14 | 0x02<<7 | 0x34, + 65334 - 65281: jis0208<<14 | 0x02<<7 | 0x35, + 65335 - 65281: jis0208<<14 | 0x02<<7 | 0x36, + 65336 - 65281: jis0208<<14 | 0x02<<7 | 0x37, + 65337 - 65281: jis0208<<14 | 0x02<<7 | 0x38, + 65338 - 65281: jis0208<<14 | 0x02<<7 | 0x39, + 65339 - 65281: jis0208<<14 | 0x00<<7 | 0x2D, + 65340 - 65281: jis0208<<14 | 0x00<<7 | 0x1F, + 65341 - 65281: jis0208<<14 | 0x00<<7 | 0x2E, + 65342 - 65281: jis0208<<14 | 0x00<<7 | 0x0F, + 65343 - 65281: jis0208<<14 | 0x00<<7 | 0x11, + 65344 - 65281: jis0208<<14 | 0x00<<7 | 0x0D, + 65345 - 65281: jis0208<<14 | 0x02<<7 | 0x40, + 65346 - 65281: jis0208<<14 | 0x02<<7 | 0x41, + 65347 - 65281: jis0208<<14 | 0x02<<7 | 0x42, + 65348 - 65281: jis0208<<14 | 0x02<<7 | 0x43, + 65349 - 65281: jis0208<<14 | 0x02<<7 | 0x44, + 65350 - 65281: jis0208<<14 | 0x02<<7 | 0x45, + 65351 - 65281: jis0208<<14 | 0x02<<7 | 0x46, + 65352 - 65281: jis0208<<14 | 0x02<<7 | 0x47, + 65353 - 65281: jis0208<<14 | 0x02<<7 | 0x48, + 65354 - 65281: jis0208<<14 | 0x02<<7 | 0x49, + 65355 - 65281: jis0208<<14 | 0x02<<7 | 0x4A, + 65356 - 65281: jis0208<<14 | 0x02<<7 | 0x4B, + 65357 - 65281: jis0208<<14 | 0x02<<7 | 0x4C, + 65358 - 65281: jis0208<<14 | 0x02<<7 | 0x4D, + 65359 - 65281: jis0208<<14 | 0x02<<7 | 0x4E, + 65360 - 65281: jis0208<<14 | 0x02<<7 | 0x4F, + 65361 - 65281: jis0208<<14 | 0x02<<7 | 0x50, + 65362 - 65281: jis0208<<14 | 0x02<<7 | 0x51, + 65363 - 65281: jis0208<<14 | 0x02<<7 | 0x52, + 65364 - 65281: jis0208<<14 | 0x02<<7 | 0x53, + 65365 - 65281: jis0208<<14 | 0x02<<7 | 0x54, + 65366 - 65281: jis0208<<14 | 0x02<<7 | 0x55, + 65367 - 65281: jis0208<<14 | 0x02<<7 | 0x56, + 65368 - 65281: jis0208<<14 | 0x02<<7 | 0x57, + 65369 - 65281: jis0208<<14 | 0x02<<7 | 0x58, + 65370 - 65281: jis0208<<14 | 0x02<<7 | 0x59, + 65371 - 65281: jis0208<<14 | 0x00<<7 | 0x2F, + 65372 - 65281: jis0208<<14 | 0x00<<7 | 0x22, + 65373 - 65281: jis0208<<14 | 0x00<<7 | 0x30, + 65374 - 65281: jis0208<<14 | 0x00<<7 | 0x20, + 65504 - 65281: jis0208<<14 | 0x00<<7 | 0x50, + 65505 - 65281: jis0208<<14 | 0x00<<7 | 0x51, + 65506 - 65281: jis0208<<14 | 0x01<<7 | 0x2B, + 65507 - 65281: jis0208<<14 | 0x00<<7 | 0x10, + 65508 - 65281: jis0208<<14 | 0x5B<<7 | 0x5B, + 65509 - 65281: jis0208<<14 | 0x00<<7 | 0x4E, +} diff --git a/backend/vendor/golang.org/x/text/encoding/korean/euckr.go b/backend/vendor/golang.org/x/text/encoding/korean/euckr.go new file mode 100644 index 0000000..034337f --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/korean/euckr.go @@ -0,0 +1,177 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package korean + +import ( + "unicode/utf8" + + "golang.org/x/text/encoding" + "golang.org/x/text/encoding/internal" + "golang.org/x/text/encoding/internal/identifier" + "golang.org/x/text/transform" +) + +// All is a list of all defined encodings in this package. +var All = []encoding.Encoding{EUCKR} + +// EUCKR is the EUC-KR encoding, also known as Code Page 949. +var EUCKR encoding.Encoding = &eucKR + +var eucKR = internal.Encoding{ + &internal.SimpleEncoding{eucKRDecoder{}, eucKREncoder{}}, + "EUC-KR", + identifier.EUCKR, +} + +type eucKRDecoder struct{ transform.NopResetter } + +func (eucKRDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 +loop: + for ; nSrc < len(src); nSrc += size { + switch c0 := src[nSrc]; { + case c0 < utf8.RuneSelf: + r, size = rune(c0), 1 + + case 0x81 <= c0 && c0 < 0xff: + if nSrc+1 >= len(src) { + if !atEOF { + err = transform.ErrShortSrc + break loop + } + r, size = utf8.RuneError, 1 + break + } + c1 := src[nSrc+1] + size = 2 + if c0 < 0xc7 { + r = 178 * rune(c0-0x81) + switch { + case 0x41 <= c1 && c1 < 0x5b: + r += rune(c1) - (0x41 - 0*26) + case 0x61 <= c1 && c1 < 0x7b: + r += rune(c1) - (0x61 - 1*26) + case 0x81 <= c1 && c1 < 0xff: + r += rune(c1) - (0x81 - 2*26) + default: + goto decError + } + } else if 0xa1 <= c1 && c1 < 0xff { + r = 178*(0xc7-0x81) + rune(c0-0xc7)*94 + rune(c1-0xa1) + } else { + goto decError + } + if int(r) < len(decode) { + r = rune(decode[r]) + if r != 0 { + break + } + } + decError: + r = utf8.RuneError + if c1 < utf8.RuneSelf { + size = 1 + } + + default: + r, size = utf8.RuneError, 1 + break + } + + if nDst+utf8.RuneLen(r) > len(dst) { + err = transform.ErrShortDst + break + } + nDst += utf8.EncodeRune(dst[nDst:], r) + } + return nDst, nSrc, err +} + +type eucKREncoder struct{ transform.NopResetter } + +func (eucKREncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 + for ; nSrc < len(src); nSrc += size { + r = rune(src[nSrc]) + + // Decode a 1-byte rune. + if r < utf8.RuneSelf { + size = 1 + + if nDst >= len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst] = uint8(r) + nDst++ + continue + + } else { + // Decode a multi-byte rune. + r, size = utf8.DecodeRune(src[nSrc:]) + if size == 1 { + // All valid runes of size 1 (those below utf8.RuneSelf) were + // handled above. We have invalid UTF-8 or we haven't seen the + // full character yet. + if !atEOF && !utf8.FullRune(src[nSrc:]) { + err = transform.ErrShortSrc + break + } + } + + // func init checks that the switch covers all tables. + switch { + case encode0Low <= r && r < encode0High: + if r = rune(encode0[r-encode0Low]); r != 0 { + goto write2 + } + case encode1Low <= r && r < encode1High: + if r = rune(encode1[r-encode1Low]); r != 0 { + goto write2 + } + case encode2Low <= r && r < encode2High: + if r = rune(encode2[r-encode2Low]); r != 0 { + goto write2 + } + case encode3Low <= r && r < encode3High: + if r = rune(encode3[r-encode3Low]); r != 0 { + goto write2 + } + case encode4Low <= r && r < encode4High: + if r = rune(encode4[r-encode4Low]); r != 0 { + goto write2 + } + case encode5Low <= r && r < encode5High: + if r = rune(encode5[r-encode5Low]); r != 0 { + goto write2 + } + case encode6Low <= r && r < encode6High: + if r = rune(encode6[r-encode6Low]); r != 0 { + goto write2 + } + } + err = internal.ErrASCIIReplacement + break + } + + write2: + if nDst+2 > len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst+0] = uint8(r >> 8) + dst[nDst+1] = uint8(r) + nDst += 2 + continue + } + return nDst, nSrc, err +} + +func init() { + // Check that the hard-coded encode switch covers all tables. + if numEncodeTables != 7 { + panic("bad numEncodeTables") + } +} diff --git a/backend/vendor/golang.org/x/text/encoding/korean/tables.go b/backend/vendor/golang.org/x/text/encoding/korean/tables.go new file mode 100644 index 0000000..0480e85 --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/korean/tables.go @@ -0,0 +1,34152 @@ +// generated by go run maketables.go; DO NOT EDIT + +// Package korean provides Korean encodings such as EUC-KR. +package korean // import "golang.org/x/text/encoding/korean" + +// decode is the decoding table from EUC-KR code to Unicode. +// It is defined at http://encoding.spec.whatwg.org/index-euc-kr.txt +var decode = [...]uint16{ + 0: 0xAC02, + 1: 0xAC03, + 2: 0xAC05, + 3: 0xAC06, + 4: 0xAC0B, + 5: 0xAC0C, + 6: 0xAC0D, + 7: 0xAC0E, + 8: 0xAC0F, + 9: 0xAC18, + 10: 0xAC1E, + 11: 0xAC1F, + 12: 0xAC21, + 13: 0xAC22, + 14: 0xAC23, + 15: 0xAC25, + 16: 0xAC26, + 17: 0xAC27, + 18: 0xAC28, + 19: 0xAC29, + 20: 0xAC2A, + 21: 0xAC2B, + 22: 0xAC2E, + 23: 0xAC32, + 24: 0xAC33, + 25: 0xAC34, + 26: 0xAC35, + 27: 0xAC36, + 28: 0xAC37, + 29: 0xAC3A, + 30: 0xAC3B, + 31: 0xAC3D, + 32: 0xAC3E, + 33: 0xAC3F, + 34: 0xAC41, + 35: 0xAC42, + 36: 0xAC43, + 37: 0xAC44, + 38: 0xAC45, + 39: 0xAC46, + 40: 0xAC47, + 41: 0xAC48, + 42: 0xAC49, + 43: 0xAC4A, + 44: 0xAC4C, + 45: 0xAC4E, + 46: 0xAC4F, + 47: 0xAC50, + 48: 0xAC51, + 49: 0xAC52, + 50: 0xAC53, + 51: 0xAC55, + 52: 0xAC56, + 53: 0xAC57, + 54: 0xAC59, + 55: 0xAC5A, + 56: 0xAC5B, + 57: 0xAC5D, + 58: 0xAC5E, + 59: 0xAC5F, + 60: 0xAC60, + 61: 0xAC61, + 62: 0xAC62, + 63: 0xAC63, + 64: 0xAC64, + 65: 0xAC65, + 66: 0xAC66, + 67: 0xAC67, + 68: 0xAC68, + 69: 0xAC69, + 70: 0xAC6A, + 71: 0xAC6B, + 72: 0xAC6C, + 73: 0xAC6D, + 74: 0xAC6E, + 75: 0xAC6F, + 76: 0xAC72, + 77: 0xAC73, + 78: 0xAC75, + 79: 0xAC76, + 80: 0xAC79, + 81: 0xAC7B, + 82: 0xAC7C, + 83: 0xAC7D, + 84: 0xAC7E, + 85: 0xAC7F, + 86: 0xAC82, + 87: 0xAC87, + 88: 0xAC88, + 89: 0xAC8D, + 90: 0xAC8E, + 91: 0xAC8F, + 92: 0xAC91, + 93: 0xAC92, + 94: 0xAC93, + 95: 0xAC95, + 96: 0xAC96, + 97: 0xAC97, + 98: 0xAC98, + 99: 0xAC99, + 100: 0xAC9A, + 101: 0xAC9B, + 102: 0xAC9E, + 103: 0xACA2, + 104: 0xACA3, + 105: 0xACA4, + 106: 0xACA5, + 107: 0xACA6, + 108: 0xACA7, + 109: 0xACAB, + 110: 0xACAD, + 111: 0xACAE, + 112: 0xACB1, + 113: 0xACB2, + 114: 0xACB3, + 115: 0xACB4, + 116: 0xACB5, + 117: 0xACB6, + 118: 0xACB7, + 119: 0xACBA, + 120: 0xACBE, + 121: 0xACBF, + 122: 0xACC0, + 123: 0xACC2, + 124: 0xACC3, + 125: 0xACC5, + 126: 0xACC6, + 127: 0xACC7, + 128: 0xACC9, + 129: 0xACCA, + 130: 0xACCB, + 131: 0xACCD, + 132: 0xACCE, + 133: 0xACCF, + 134: 0xACD0, + 135: 0xACD1, + 136: 0xACD2, + 137: 0xACD3, + 138: 0xACD4, + 139: 0xACD6, + 140: 0xACD8, + 141: 0xACD9, + 142: 0xACDA, + 143: 0xACDB, + 144: 0xACDC, + 145: 0xACDD, + 146: 0xACDE, + 147: 0xACDF, + 148: 0xACE2, + 149: 0xACE3, + 150: 0xACE5, + 151: 0xACE6, + 152: 0xACE9, + 153: 0xACEB, + 154: 0xACED, + 155: 0xACEE, + 156: 0xACF2, + 157: 0xACF4, + 158: 0xACF7, + 159: 0xACF8, + 160: 0xACF9, + 161: 0xACFA, + 162: 0xACFB, + 163: 0xACFE, + 164: 0xACFF, + 165: 0xAD01, + 166: 0xAD02, + 167: 0xAD03, + 168: 0xAD05, + 169: 0xAD07, + 170: 0xAD08, + 171: 0xAD09, + 172: 0xAD0A, + 173: 0xAD0B, + 174: 0xAD0E, + 175: 0xAD10, + 176: 0xAD12, + 177: 0xAD13, + 178: 0xAD14, + 179: 0xAD15, + 180: 0xAD16, + 181: 0xAD17, + 182: 0xAD19, + 183: 0xAD1A, + 184: 0xAD1B, + 185: 0xAD1D, + 186: 0xAD1E, + 187: 0xAD1F, + 188: 0xAD21, + 189: 0xAD22, + 190: 0xAD23, + 191: 0xAD24, + 192: 0xAD25, + 193: 0xAD26, + 194: 0xAD27, + 195: 0xAD28, + 196: 0xAD2A, + 197: 0xAD2B, + 198: 0xAD2E, + 199: 0xAD2F, + 200: 0xAD30, + 201: 0xAD31, + 202: 0xAD32, + 203: 0xAD33, + 204: 0xAD36, + 205: 0xAD37, + 206: 0xAD39, + 207: 0xAD3A, + 208: 0xAD3B, + 209: 0xAD3D, + 210: 0xAD3E, + 211: 0xAD3F, + 212: 0xAD40, + 213: 0xAD41, + 214: 0xAD42, + 215: 0xAD43, + 216: 0xAD46, + 217: 0xAD48, + 218: 0xAD4A, + 219: 0xAD4B, + 220: 0xAD4C, + 221: 0xAD4D, + 222: 0xAD4E, + 223: 0xAD4F, + 224: 0xAD51, + 225: 0xAD52, + 226: 0xAD53, + 227: 0xAD55, + 228: 0xAD56, + 229: 0xAD57, + 230: 0xAD59, + 231: 0xAD5A, + 232: 0xAD5B, + 233: 0xAD5C, + 234: 0xAD5D, + 235: 0xAD5E, + 236: 0xAD5F, + 237: 0xAD60, + 238: 0xAD62, + 239: 0xAD64, + 240: 0xAD65, + 241: 0xAD66, + 242: 0xAD67, + 243: 0xAD68, + 244: 0xAD69, + 245: 0xAD6A, + 246: 0xAD6B, + 247: 0xAD6E, + 248: 0xAD6F, + 249: 0xAD71, + 250: 0xAD72, + 251: 0xAD77, + 252: 0xAD78, + 253: 0xAD79, + 254: 0xAD7A, + 255: 0xAD7E, + 256: 0xAD80, + 257: 0xAD83, + 258: 0xAD84, + 259: 0xAD85, + 260: 0xAD86, + 261: 0xAD87, + 262: 0xAD8A, + 263: 0xAD8B, + 264: 0xAD8D, + 265: 0xAD8E, + 266: 0xAD8F, + 267: 0xAD91, + 268: 0xAD92, + 269: 0xAD93, + 270: 0xAD94, + 271: 0xAD95, + 272: 0xAD96, + 273: 0xAD97, + 274: 0xAD98, + 275: 0xAD99, + 276: 0xAD9A, + 277: 0xAD9B, + 278: 0xAD9E, + 279: 0xAD9F, + 280: 0xADA0, + 281: 0xADA1, + 282: 0xADA2, + 283: 0xADA3, + 284: 0xADA5, + 285: 0xADA6, + 286: 0xADA7, + 287: 0xADA8, + 288: 0xADA9, + 289: 0xADAA, + 290: 0xADAB, + 291: 0xADAC, + 292: 0xADAD, + 293: 0xADAE, + 294: 0xADAF, + 295: 0xADB0, + 296: 0xADB1, + 297: 0xADB2, + 298: 0xADB3, + 299: 0xADB4, + 300: 0xADB5, + 301: 0xADB6, + 302: 0xADB8, + 303: 0xADB9, + 304: 0xADBA, + 305: 0xADBB, + 306: 0xADBC, + 307: 0xADBD, + 308: 0xADBE, + 309: 0xADBF, + 310: 0xADC2, + 311: 0xADC3, + 312: 0xADC5, + 313: 0xADC6, + 314: 0xADC7, + 315: 0xADC9, + 316: 0xADCA, + 317: 0xADCB, + 318: 0xADCC, + 319: 0xADCD, + 320: 0xADCE, + 321: 0xADCF, + 322: 0xADD2, + 323: 0xADD4, + 324: 0xADD5, + 325: 0xADD6, + 326: 0xADD7, + 327: 0xADD8, + 328: 0xADD9, + 329: 0xADDA, + 330: 0xADDB, + 331: 0xADDD, + 332: 0xADDE, + 333: 0xADDF, + 334: 0xADE1, + 335: 0xADE2, + 336: 0xADE3, + 337: 0xADE5, + 338: 0xADE6, + 339: 0xADE7, + 340: 0xADE8, + 341: 0xADE9, + 342: 0xADEA, + 343: 0xADEB, + 344: 0xADEC, + 345: 0xADED, + 346: 0xADEE, + 347: 0xADEF, + 348: 0xADF0, + 349: 0xADF1, + 350: 0xADF2, + 351: 0xADF3, + 352: 0xADF4, + 353: 0xADF5, + 354: 0xADF6, + 355: 0xADF7, + 356: 0xADFA, + 357: 0xADFB, + 358: 0xADFD, + 359: 0xADFE, + 360: 0xAE02, + 361: 0xAE03, + 362: 0xAE04, + 363: 0xAE05, + 364: 0xAE06, + 365: 0xAE07, + 366: 0xAE0A, + 367: 0xAE0C, + 368: 0xAE0E, + 369: 0xAE0F, + 370: 0xAE10, + 371: 0xAE11, + 372: 0xAE12, + 373: 0xAE13, + 374: 0xAE15, + 375: 0xAE16, + 376: 0xAE17, + 377: 0xAE18, + 378: 0xAE19, + 379: 0xAE1A, + 380: 0xAE1B, + 381: 0xAE1C, + 382: 0xAE1D, + 383: 0xAE1E, + 384: 0xAE1F, + 385: 0xAE20, + 386: 0xAE21, + 387: 0xAE22, + 388: 0xAE23, + 389: 0xAE24, + 390: 0xAE25, + 391: 0xAE26, + 392: 0xAE27, + 393: 0xAE28, + 394: 0xAE29, + 395: 0xAE2A, + 396: 0xAE2B, + 397: 0xAE2C, + 398: 0xAE2D, + 399: 0xAE2E, + 400: 0xAE2F, + 401: 0xAE32, + 402: 0xAE33, + 403: 0xAE35, + 404: 0xAE36, + 405: 0xAE39, + 406: 0xAE3B, + 407: 0xAE3C, + 408: 0xAE3D, + 409: 0xAE3E, + 410: 0xAE3F, + 411: 0xAE42, + 412: 0xAE44, + 413: 0xAE47, + 414: 0xAE48, + 415: 0xAE49, + 416: 0xAE4B, + 417: 0xAE4F, + 418: 0xAE51, + 419: 0xAE52, + 420: 0xAE53, + 421: 0xAE55, + 422: 0xAE57, + 423: 0xAE58, + 424: 0xAE59, + 425: 0xAE5A, + 426: 0xAE5B, + 427: 0xAE5E, + 428: 0xAE62, + 429: 0xAE63, + 430: 0xAE64, + 431: 0xAE66, + 432: 0xAE67, + 433: 0xAE6A, + 434: 0xAE6B, + 435: 0xAE6D, + 436: 0xAE6E, + 437: 0xAE6F, + 438: 0xAE71, + 439: 0xAE72, + 440: 0xAE73, + 441: 0xAE74, + 442: 0xAE75, + 443: 0xAE76, + 444: 0xAE77, + 445: 0xAE7A, + 446: 0xAE7E, + 447: 0xAE7F, + 448: 0xAE80, + 449: 0xAE81, + 450: 0xAE82, + 451: 0xAE83, + 452: 0xAE86, + 453: 0xAE87, + 454: 0xAE88, + 455: 0xAE89, + 456: 0xAE8A, + 457: 0xAE8B, + 458: 0xAE8D, + 459: 0xAE8E, + 460: 0xAE8F, + 461: 0xAE90, + 462: 0xAE91, + 463: 0xAE92, + 464: 0xAE93, + 465: 0xAE94, + 466: 0xAE95, + 467: 0xAE96, + 468: 0xAE97, + 469: 0xAE98, + 470: 0xAE99, + 471: 0xAE9A, + 472: 0xAE9B, + 473: 0xAE9C, + 474: 0xAE9D, + 475: 0xAE9E, + 476: 0xAE9F, + 477: 0xAEA0, + 478: 0xAEA1, + 479: 0xAEA2, + 480: 0xAEA3, + 481: 0xAEA4, + 482: 0xAEA5, + 483: 0xAEA6, + 484: 0xAEA7, + 485: 0xAEA8, + 486: 0xAEA9, + 487: 0xAEAA, + 488: 0xAEAB, + 489: 0xAEAC, + 490: 0xAEAD, + 491: 0xAEAE, + 492: 0xAEAF, + 493: 0xAEB0, + 494: 0xAEB1, + 495: 0xAEB2, + 496: 0xAEB3, + 497: 0xAEB4, + 498: 0xAEB5, + 499: 0xAEB6, + 500: 0xAEB7, + 501: 0xAEB8, + 502: 0xAEB9, + 503: 0xAEBA, + 504: 0xAEBB, + 505: 0xAEBF, + 506: 0xAEC1, + 507: 0xAEC2, + 508: 0xAEC3, + 509: 0xAEC5, + 510: 0xAEC6, + 511: 0xAEC7, + 512: 0xAEC8, + 513: 0xAEC9, + 514: 0xAECA, + 515: 0xAECB, + 516: 0xAECE, + 517: 0xAED2, + 518: 0xAED3, + 519: 0xAED4, + 520: 0xAED5, + 521: 0xAED6, + 522: 0xAED7, + 523: 0xAEDA, + 524: 0xAEDB, + 525: 0xAEDD, + 526: 0xAEDE, + 527: 0xAEDF, + 528: 0xAEE0, + 529: 0xAEE1, + 530: 0xAEE2, + 531: 0xAEE3, + 532: 0xAEE4, + 533: 0xAEE5, + 534: 0xAEE6, + 535: 0xAEE7, + 536: 0xAEE9, + 537: 0xAEEA, + 538: 0xAEEC, + 539: 0xAEEE, + 540: 0xAEEF, + 541: 0xAEF0, + 542: 0xAEF1, + 543: 0xAEF2, + 544: 0xAEF3, + 545: 0xAEF5, + 546: 0xAEF6, + 547: 0xAEF7, + 548: 0xAEF9, + 549: 0xAEFA, + 550: 0xAEFB, + 551: 0xAEFD, + 552: 0xAEFE, + 553: 0xAEFF, + 554: 0xAF00, + 555: 0xAF01, + 556: 0xAF02, + 557: 0xAF03, + 558: 0xAF04, + 559: 0xAF05, + 560: 0xAF06, + 561: 0xAF09, + 562: 0xAF0A, + 563: 0xAF0B, + 564: 0xAF0C, + 565: 0xAF0E, + 566: 0xAF0F, + 567: 0xAF11, + 568: 0xAF12, + 569: 0xAF13, + 570: 0xAF14, + 571: 0xAF15, + 572: 0xAF16, + 573: 0xAF17, + 574: 0xAF18, + 575: 0xAF19, + 576: 0xAF1A, + 577: 0xAF1B, + 578: 0xAF1C, + 579: 0xAF1D, + 580: 0xAF1E, + 581: 0xAF1F, + 582: 0xAF20, + 583: 0xAF21, + 584: 0xAF22, + 585: 0xAF23, + 586: 0xAF24, + 587: 0xAF25, + 588: 0xAF26, + 589: 0xAF27, + 590: 0xAF28, + 591: 0xAF29, + 592: 0xAF2A, + 593: 0xAF2B, + 594: 0xAF2E, + 595: 0xAF2F, + 596: 0xAF31, + 597: 0xAF33, + 598: 0xAF35, + 599: 0xAF36, + 600: 0xAF37, + 601: 0xAF38, + 602: 0xAF39, + 603: 0xAF3A, + 604: 0xAF3B, + 605: 0xAF3E, + 606: 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+ 17484: 0x614C, + 17485: 0x6643, + 17486: 0x6644, + 17487: 0x69A5, + 17488: 0x6CC1, + 17489: 0x6E5F, + 17490: 0x6EC9, + 17491: 0x6F62, + 17492: 0x714C, + 17493: 0x749C, + 17494: 0x7687, + 17495: 0x7BC1, + 17496: 0x7C27, + 17497: 0x8352, + 17498: 0x8757, + 17499: 0x9051, + 17500: 0x968D, + 17501: 0x9EC3, + 17502: 0x532F, + 17503: 0x56DE, + 17504: 0x5EFB, + 17505: 0x5F8A, + 17506: 0x6062, + 17507: 0x6094, + 17508: 0x61F7, + 17509: 0x6666, + 17510: 0x6703, + 17511: 0x6A9C, + 17512: 0x6DEE, + 17513: 0x6FAE, + 17514: 0x7070, + 17515: 0x736A, + 17516: 0x7E6A, + 17517: 0x81BE, + 17518: 0x8334, + 17519: 0x86D4, + 17520: 0x8AA8, + 17521: 0x8CC4, + 17522: 0x5283, + 17523: 0x7372, + 17524: 0x5B96, + 17525: 0x6A6B, + 17526: 0x9404, + 17527: 0x54EE, + 17528: 0x5686, + 17529: 0x5B5D, + 17530: 0x6548, + 17531: 0x6585, + 17532: 0x66C9, + 17533: 0x689F, + 17534: 0x6D8D, + 17535: 0x6DC6, + 17536: 0x723B, + 17537: 0x80B4, + 17538: 0x9175, + 17539: 0x9A4D, + 17540: 0x4FAF, + 17541: 0x5019, + 17542: 0x539A, + 17543: 0x540E, + 17544: 0x543C, + 17545: 0x5589, + 17546: 0x55C5, + 17547: 0x5E3F, + 17548: 0x5F8C, + 17549: 0x673D, + 17550: 0x7166, + 17551: 0x73DD, + 17552: 0x9005, + 17553: 0x52DB, + 17554: 0x52F3, + 17555: 0x5864, + 17556: 0x58CE, + 17557: 0x7104, + 17558: 0x718F, + 17559: 0x71FB, + 17560: 0x85B0, + 17561: 0x8A13, + 17562: 0x6688, + 17563: 0x85A8, + 17564: 0x55A7, + 17565: 0x6684, + 17566: 0x714A, + 17567: 0x8431, + 17568: 0x5349, + 17569: 0x5599, + 17570: 0x6BC1, + 17571: 0x5F59, + 17572: 0x5FBD, + 17573: 0x63EE, + 17574: 0x6689, + 17575: 0x7147, + 17576: 0x8AF1, + 17577: 0x8F1D, + 17578: 0x9EBE, + 17579: 0x4F11, + 17580: 0x643A, + 17581: 0x70CB, + 17582: 0x7566, + 17583: 0x8667, + 17584: 0x6064, + 17585: 0x8B4E, + 17586: 0x9DF8, + 17587: 0x5147, + 17588: 0x51F6, + 17589: 0x5308, + 17590: 0x6D36, + 17591: 0x80F8, + 17592: 0x9ED1, + 17593: 0x6615, + 17594: 0x6B23, + 17595: 0x7098, + 17596: 0x75D5, + 17597: 0x5403, + 17598: 0x5C79, + 17599: 0x7D07, + 17600: 0x8A16, + 17601: 0x6B20, + 17602: 0x6B3D, + 17603: 0x6B46, + 17604: 0x5438, + 17605: 0x6070, + 17606: 0x6D3D, + 17607: 0x7FD5, + 17608: 0x8208, + 17609: 0x50D6, + 17610: 0x51DE, + 17611: 0x559C, + 17612: 0x566B, + 17613: 0x56CD, + 17614: 0x59EC, + 17615: 0x5B09, + 17616: 0x5E0C, + 17617: 0x6199, + 17618: 0x6198, + 17619: 0x6231, + 17620: 0x665E, + 17621: 0x66E6, + 17622: 0x7199, + 17623: 0x71B9, + 17624: 0x71BA, + 17625: 0x72A7, + 17626: 0x79A7, + 17627: 0x7A00, + 17628: 0x7FB2, + 17629: 0x8A70, +} + +const numEncodeTables = 7 + +// encodeX are the encoding tables from Unicode to EUC-KR code, +// sorted by decreasing length. +// encode0: 20893 entries for runes in [19968, 40861). +// encode1: 11172 entries for runes in [44032, 55204). +// encode2: 1625 entries for runes in [ 8213, 9838). +// encode3: 990 entries for runes in [12288, 13278). +// encode4: 945 entries for runes in [ 161, 1106). +// encode5: 268 entries for runes in [63744, 64012). +// encode6: 230 entries for runes in [65281, 65511). + +const encode0Low, encode0High = 19968, 40861 + +var encode0 = [...]uint16{ + 19968 - 19968: 0xECE9, + 19969 - 19968: 0xEFCB, + 19971 - 19968: 0xF6D2, + 19975 - 19968: 0xD8B2, + 19976 - 19968: 0xEDDB, + 19977 - 19968: 0xDFB2, + 19978 - 19968: 0xDFBE, + 19979 - 19968: 0xF9BB, + 19981 - 19968: 0xDCF4, + 19985 - 19968: 0xF5E4, + 19988 - 19968: 0xF3A6, + 19989 - 19968: 0xDDE0, + 19990 - 19968: 0xE1A6, + 19992 - 19968: 0xCEF8, + 19993 - 19968: 0xDCB0, + 19998 - 19968: 0xE3AA, + 20013 - 19968: 0xF1E9, + 20018 - 19968: 0xCDFA, + 20024 - 19968: 0xFCAF, + 20025 - 19968: 0xD3A1, + 20027 - 19968: 0xF1AB, + 20034 - 19968: 0xE7D1, + 20035 - 19968: 0xD2AC, + 20037 - 19968: 0xCEF9, + 20043 - 19968: 0xF1FD, + 20045 - 19968: 0xDEBF, + 20046 - 19968: 0xFBBA, + 20047 - 19968: 0xF9B9, + 20054 - 19968: 0xCED2, + 20056 - 19968: 0xE3AB, + 20057 - 19968: 0xEBE0, + 20061 - 19968: 0xCEFA, + 20062 - 19968: 0xCBF7, + 20063 - 19968: 0xE5A5, + 20075 - 19968: 0xCAE1, + 20077 - 19968: 0xD4CC, + 20083 - 19968: 0xEAE1, + 20086 - 19968: 0xDCE3, + 20087 - 19968: 0xDFAD, + 20094 - 19968: 0xCBEB, + 20098 - 19968: 0xD5AF, + 20102 - 19968: 0xD6F5, + 20104 - 19968: 0xE5F8, + 20107 - 19968: 0xDEC0, + 20108 - 19968: 0xECA3, + 20110 - 19968: 0xE9CD, + 20112 - 19968: 0xEAA7, + 20113 - 19968: 0xE9F6, + 20114 - 19968: 0xFBBB, + 20116 - 19968: 0xE7E9, + 20117 - 19968: 0xEFCC, + 20120 - 19968: 0xD0E6, + 20123 - 19968: 0xDEC1, + 20126 - 19968: 0xE4AC, + 20129 - 19968: 0xD8CC, + 20130 - 19968: 0xF9F1, + 20132 - 19968: 0xCEDF, + 20133 - 19968: 0xFAA4, + 20134 - 19968: 0xE6B2, + 20136 - 19968: 0xFAFB, + 20139 - 19968: 0xFABD, + 20140 - 19968: 0xCCC8, + 20141 - 19968: 0xEFCD, + 20142 - 19968: 0xD5D5, + 20150 - 19968: 0xD3A2, + 20154 - 19968: 0xECD1, + 20160 - 19968: 0xE4A7, + 20161 - 19968: 0xECD2, + 20164 - 19968: 0xF6B1, + 20167 - 19968: 0xCEFB, + 20170 - 19968: 0xD0D1, + 20171 - 19968: 0xCBBF, + 20173 - 19968: 0xEDA4, + 20180 - 19968: 0xEDA8, + 20181 - 19968: 0xDEC2, + 20182 - 19968: 0xF6E2, + 20183 - 19968: 0xEDDC, + 20184 - 19968: 0xDCF5, + 20185 - 19968: 0xE0B9, + 20189 - 19968: 0xD4CE, + 20191 - 19968: 0xF4B5, + 20195 - 19968: 0xD3DB, + 20196 - 19968: 0xD6B5, + 20197 - 19968: 0xECA4, + 20208 - 19968: 0xE4E6, + 20210 - 19968: 0xF1EA, + 20214 - 19968: 0xCBEC, + 20215 - 19968: 0xCBC0, + 20219 - 19968: 0xECF2, + 20225 - 19968: 0xD0EA, + 20233 - 19968: 0xF9F2, + 20234 - 19968: 0xECA5, + 20235 - 19968: 0xD0DF, + 20237 - 19968: 0xE7EA, + 20238 - 19968: 0xD0EB, + 20239 - 19968: 0xDCD1, + 20240 - 19968: 0xDBE9, + 20241 - 19968: 0xFDCC, + 20271 - 19968: 0xDBD7, + 20276 - 19968: 0xDAE1, + 20278 - 19968: 0xD6B6, + 20280 - 19968: 0xE3DF, + 20282 - 19968: 0xDEC3, + 20284 - 19968: 0xDEC4, + 20285 - 19968: 0xCAA1, + 20291 - 19968: 0xEEEC, + 20294 - 19968: 0xD3A3, + 20295 - 19968: 0xEEB7, + 20296 - 19968: 0xF8CF, + 20301 - 19968: 0xEAC8, + 20302 - 19968: 0xEEB8, + 20303 - 19968: 0xF1AC, + 20304 - 19968: 0xF1A5, + 20305 - 19968: 0xE9CE, + 20309 - 19968: 0xF9BC, + 20313 - 19968: 0xE5F9, + 20314 - 19968: 0xECEA, + 20315 - 19968: 0xDDD6, + 20316 - 19968: 0xEDC2, + 20329 - 19968: 0xF8A5, + 20335 - 19968: 0xE5BA, + 20336 - 19968: 0xDBD8, + 20339 - 19968: 0xCAA2, + 20342 - 19968: 0xD1CD, + 20346 - 19968: 0xEEED, + 20350 - 19968: 0xECEB, + 20351 - 19968: 0xDEC5, + 20353 - 19968: 0xE3E0, + 20355 - 19968: 0xCAC9, + 20356 - 19968: 0xF2E9, + 20358 - 19968: 0xD5CE, + 20360 - 19968: 0xF6B6, + 20362 - 19968: 0xCEC2, + 20363 - 19968: 0xD6C7, + 20365 - 19968: 0xE3B4, + 20367 - 19968: 0xF1AD, + 20369 - 19968: 0xEAE2, + 20374 - 19968: 0xD7C2, + 20376 - 19968: 0xF3A7, + 20379 - 19968: 0xCDEA, + 20381 - 19968: 0xEBEE, + 20398 - 19968: 0xD9B2, + 20399 - 19968: 0xFDA5, + 20405 - 19968: 0xF6D5, + 20406 - 19968: 0xD5E2, + 20415 - 19968: 0xF8B5, + 20418 - 19968: 0xCCF5, + 20419 - 19968: 0xF5B5, + 20420 - 19968: 0xE4AD, + 20425 - 19968: 0xE7EB, + 20426 - 19968: 0xF1D5, + 20430 - 19968: 0xF0BB, + 20433 - 19968: 0xE9B5, + 20435 - 19968: 0xCCC9, + 20436 - 19968: 0xFAD5, + 20439 - 19968: 0xE1D4, + 20442 - 19968: 0xD7D6, + 20445 - 19968: 0xDCC1, + 20447 - 19968: 0xDEC6, + 20448 - 19968: 0xFAEF, + 20449 - 19968: 0xE3E1, + 20462 - 19968: 0xE1F3, + 20463 - 19968: 0xDCF6, + 20465 - 19968: 0xCEFC, + 20467 - 19968: 0xDBC4, + 20469 - 19968: 0xF8F1, + 20472 - 19968: 0xDCE4, + 20474 - 19968: 0xE5EF, + 20482 - 19968: 0xDCB1, + 20486 - 19968: 0xD5D6, + 20489 - 19968: 0xF3DA, + 20491 - 19968: 0xCBC1, + 20493 - 19968: 0xDBC3, + 20497 - 19968: 0xD9FA, + 20498 - 19968: 0xD3EE, + 20502 - 19968: 0xFAB8, + 20505 - 19968: 0xFDA6, + 20506 - 19968: 0xEBEF, + 20508 - 19968: 0xF4A6, + 20510 - 19968: 0xCCCA, + 20511 - 19968: 0xF3A8, + 20513 - 19968: 0xF3DB, + 20515 - 19968: 0xDBA7, + 20516 - 19968: 0xF6B7, + 20518 - 19968: 0xCFE6, + 20519 - 19968: 0xF0F2, + 20520 - 19968: 0xCBDA, + 20522 - 19968: 0xE7D2, + 20523 - 19968: 0xD7C3, + 20524 - 19968: 0xF6F0, + 20525 - 19968: 0xE8DE, + 20539 - 19968: 0xE5A6, + 20547 - 19968: 0xE5E7, + 20551 - 19968: 0xCAA3, + 20552 - 19968: 0xCCA7, + 20553 - 19968: 0xEAC9, + 20559 - 19968: 0xF8B6, + 20565 - 19968: 0xFAA5, + 20570 - 19968: 0xF1AE, + 20572 - 19968: 0xEFCE, + 20581 - 19968: 0xCBED, + 20596 - 19968: 0xF6B0, + 20597 - 19968: 0xEFCF, + 20598 - 19968: 0xE9CF, + 20600 - 19968: 0xF7DE, + 20608 - 19968: 0xCED3, + 20613 - 19968: 0xDCF7, + 20621 - 19968: 0xDBA8, + 20625 - 19968: 0xCBF8, + 20632 - 19968: 0xDFA1, + 20633 - 19968: 0xDDE1, + 20652 - 19968: 0xF5CA, + 20653 - 19968: 0xE9B6, + 20658 - 19968: 0xE7EC, + 20659 - 19968: 0xEEEE, + 20661 - 19968: 0xF3F0, + 20663 - 19968: 0xDFBF, + 20670 - 19968: 0xCCCB, + 20677 - 19968: 0xD0C1, + 20681 - 19968: 0xF4D2, + 20682 - 19968: 0xE0BA, + 20687 - 19968: 0xDFC0, + 20689 - 19968: 0xCEE0, + 20693 - 19968: 0xDCD2, + 20694 - 19968: 0xFDEA, + 20698 - 19968: 0xD6F6, + 20702 - 19968: 0xEACA, + 20709 - 19968: 0xE8E9, + 20711 - 19968: 0xE3AC, + 20717 - 19968: 0xF3D0, + 20729 - 19968: 0xCAA4, + 20731 - 19968: 0xDBF8, + 20735 - 19968: 0xDEC7, + 20736 - 19968: 0xEBF0, + 20737 - 19968: 0xF1D6, + 20740 - 19968: 0xE5E2, + 20742 - 19968: 0xCCCC, + 20745 - 19968: 0xCBFB, + 20754 - 19968: 0xEAE3, + 20767 - 19968: 0xDFC1, + 20769 - 19968: 0xD6ED, + 20778 - 19968: 0xE9D0, + 20786 - 19968: 0xEEB9, + 20791 - 19968: 0xD5E3, + 20794 - 19968: 0xD1D3, + 20796 - 19968: 0xE5F0, + 20800 - 19968: 0xE8B4, + 20801 - 19968: 0xEBC3, + 20803 - 19968: 0xEAAA, + 20804 - 19968: 0xFAFC, + 20805 - 19968: 0xF5F6, + 20806 - 19968: 0xF0BC, + 20807 - 19968: 0xFDD4, + 20808 - 19968: 0xE0BB, + 20809 - 19968: 0xCEC3, + 20811 - 19968: 0xD0BA, + 20812 - 19968: 0xF7BA, + 20813 - 19968: 0xD8F3, + 20814 - 19968: 0xF7CD, + 20818 - 19968: 0xE4AE, + 20828 - 19968: 0xD4DF, + 20834 - 19968: 0xD0E7, + 20837 - 19968: 0xECFD, + 20839 - 19968: 0xD2AE, + 20840 - 19968: 0xEEEF, + 20841 - 19968: 0xD5D7, + 20842 - 19968: 0xEAE4, + 20843 - 19968: 0xF8A2, + 20844 - 19968: 0xCDEB, + 20845 - 19968: 0xD7BF, + 20846 - 19968: 0xFBB1, + 20849 - 19968: 0xCDEC, + 20853 - 19968: 0xDCB2, + 20854 - 19968: 0xD0EC, + 20855 - 19968: 0xCEFD, + 20856 - 19968: 0xEEF0, + 20860 - 19968: 0xCCC2, + 20864 - 19968: 0xD0ED, + 20870 - 19968: 0xE5F7, + 20874 - 19968: 0xF3FC, + 20877 - 19968: 0xEEA2, + 20882 - 19968: 0xD9B3, + 20885 - 19968: 0xD8F4, + 20887 - 19968: 0xE9B7, + 20896 - 19968: 0xCEAE, + 20901 - 19968: 0xD9A2, + 20906 - 19968: 0xD8F1, + 20908 - 19968: 0xD4CF, + 20918 - 19968: 0xE5A7, + 20919 - 19968: 0xD5D2, + 20925 - 19968: 0xD6A9, + 20932 - 19968: 0xF4A2, + 20934 - 19968: 0xF1D7, + 20937 - 19968: 0xD5D8, + 20939 - 19968: 0xF0BD, + 20940 - 19968: 0xD7D0, + 20941 - 19968: 0xD4D0, + 20956 - 19968: 0xD7CF, + 20957 - 19968: 0xEBEA, + 20958 - 19968: 0xFDEB, + 20961 - 19968: 0xDBED, + 20976 - 19968: 0xFCC5, + 20977 - 19968: 0xCBC2, + 20982 - 19968: 0xFDD5, + 20984 - 19968: 0xF4C8, + 20985 - 19968: 0xE8EA, + 20986 - 19968: 0xF5F3, + 20989 - 19968: 0xF9DE, + 20992 - 19968: 0xD3EF, + 20995 - 19968: 0xECD3, + 20998 - 19968: 0xDDC2, + 20999 - 19968: 0xEFB7, + 21000 - 19968: 0xE7D4, + 21002 - 19968: 0xCACA, + 21006 - 19968: 0xD9FB, + 21009 - 19968: 0xFAFD, + 21015 - 19968: 0xD6AA, + 21021 - 19968: 0xF4F8, + 21028 - 19968: 0xF7F7, + 21029 - 19968: 0xDCAC, + 21033 - 19968: 0xD7D7, + 21034 - 19968: 0xDFA2, + 21038 - 19968: 0xCEBE, + 21040 - 19968: 0xD3F0, + 21046 - 19968: 0xF0A4, + 21047 - 19968: 0xE1EC, + 21048 - 19968: 0xCFE7, + 21049 - 19968: 0xF3CB, + 21050 - 19968: 0xEDA9, + 21051 - 19968: 0xCABE, + 21059 - 19968: 0xF4EF, + 21063 - 19968: 0xF6CE, + 21066 - 19968: 0xDEFB, + 21067 - 19968: 0xD0BB, + 21068 - 19968: 0xD5B7, + 21069 - 19968: 0xEEF1, + 21076 - 19968: 0xF4A8, + 21078 - 19968: 0xDCF8, + 21083 - 19968: 0xCBA7, + 21085 - 19968: 0xDACE, + 21089 - 19968: 0xE0E6, + 21097 - 19968: 0xEDA5, + 21098 - 19968: 0xEEF2, + 21103 - 19968: 0xDCF9, + 21106 - 19968: 0xF9DC, + 21109 - 19968: 0xF3DC, + 21117 - 19968: 0xF8F2, + 21119 - 19968: 0xF4F9, + 21123 - 19968: 0xFCF1, + 21127 - 19968: 0xD0BC, + 21128 - 19968: 0xDBF9, + 21129 - 19968: 0xD7B1, + 21133 - 19968: 0xCBFC, + 21137 - 19968: 0xF0A5, + 21138 - 19968: 0xCBFD, + 21147 - 19968: 0xD5F4, + 21151 - 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19968: 0xD7FD, + 38681 - 19968: 0xE7CE, + 38684 - 19968: 0xDFDC, + 38686 - 19968: 0xF9C7, + 38695 - 19968: 0xD9F6, + 38704 - 19968: 0xDFAC, + 38706 - 19968: 0xD6DA, + 38713 - 19968: 0xDCA4, + 38717 - 19968: 0xF0B8, + 38722 - 19968: 0xD5FA, + 38724 - 19968: 0xE4F7, + 38728 - 19968: 0xD6C4, + 38737 - 19968: 0xF4EC, + 38742 - 19968: 0xEFFE, + 38748 - 19968: 0xF0A1, + 38750 - 19968: 0xDEAA, + 38753 - 19968: 0xDABC, + 38754 - 19968: 0xD8FC, + 38761 - 19968: 0xFAD4, + 38765 - 19968: 0xECE5, + 38772 - 19968: 0xFCA8, + 38775 - 19968: 0xECE6, + 38778 - 19968: 0xD8CB, + 38795 - 19968: 0xFBB9, + 38797 - 19968: 0xE4D3, + 38799 - 19968: 0xCDF9, + 38816 - 19968: 0xCFD3, + 38824 - 19968: 0xCAEA, + 38827 - 19968: 0xCFD4, + 38829 - 19968: 0xF8BD, + 38854 - 19968: 0xF4C7, + 38859 - 19968: 0xEADF, + 38867 - 19968: 0xF9DB, + 38876 - 19968: 0xD4B7, + 38899 - 19968: 0xEBE5, + 38902 - 19968: 0xE1D2, + 38907 - 19968: 0xEAA4, + 38911 - 19968: 0xFAC2, + 38912 - 19968: 0xFBE1, + 38913 - 19968: 0xFAED, + 38914 - 19968: 0xF0A2, + 38915 - 19968: 0xCCF1, + 38917 - 19968: 0xFAA3, + 38918 - 19968: 0xE2F7, + 38920 - 19968: 0xE2CE, + 38922 - 19968: 0xE9F5, + 38924 - 19968: 0xE1EB, + 38928 - 19968: 0xE7E8, + 38929 - 19968: 0xE8D7, + 38930 - 19968: 0xDAF8, + 38931 - 19968: 0xD4CB, + 38935 - 19968: 0xF7F6, + 38936 - 19968: 0xD6C5, + 38957 - 19968: 0xD4E9, + 38960 - 19968: 0xFAFA, + 38968 - 19968: 0xCCF2, + 38969 - 19968: 0xF7DD, + 38971 - 19968: 0xDEBA, + 38982 - 19968: 0xCEA8, + 38988 - 19968: 0xF0B9, + 38989 - 19968: 0xE4FE, + 38990 - 19968: 0xE4C9, + 38996 - 19968: 0xE4D4, + 39000 - 19968: 0xEAC3, + 39002 - 19968: 0xEFB4, + 39006 - 19968: 0xD7BE, + 39013 - 19968: 0xFBE2, + 39015 - 19968: 0xCDD3, + 39019 - 19968: 0xEFB5, + 39023 - 19968: 0xFAE9, + 39080 - 19968: 0xF9A6, + 39087 - 19968: 0xDFBD, + 39089 - 19968: 0xF7C7, + 39108 - 19968: 0xF8FD, + 39111 - 19968: 0xF8FC, + 39131 - 19968: 0xDEAB, + 39132 - 19968: 0xDBE8, + 39135 - 19968: 0xE3DD, + 39137 - 19968: 0xE1E2, + 39138 - 19968: 0xD1C6, + 39149 - 19968: 0xF6D0, + 39150 - 19968: 0xEBE6, + 39151 - 19968: 0xDAF9, + 39156 - 19968: 0xECC7, + 39164 - 19968: 0xDEF8, + 39165 - 19968: 0xF8E9, + 39166 - 19968: 0xE3DE, + 39171 - 19968: 0xCEF5, + 39177 - 19968: 0xFAC3, + 39178 - 19968: 0xE5D7, + 39180 - 19968: 0xECC8, + 39184 - 19968: 0xF3C9, + 39187 - 19968: 0xE4BB, + 39192 - 19968: 0xE6AE, + 39198 - 19968: 0xEFB6, + 39200 - 19968: 0xDCBF, + 39208 - 19968: 0xCEBD, + 39237 - 19968: 0xD8C3, + 39241 - 19968: 0xD0CF, + 39243 - 19968: 0xCFFA, + 39244 - 19968: 0xF3CA, + 39245 - 19968: 0xE0D7, + 39249 - 19968: 0xD1C7, + 39250 - 19968: 0xE9AE, + 39252 - 19968: 0xE8BD, + 39255 - 19968: 0xFAC4, + 39318 - 19968: 0xE2CF, + 39321 - 19968: 0xFAC5, + 39325 - 19968: 0xF9B8, + 39333 - 19968: 0xDCE0, + 39336 - 19968: 0xFBB0, + 39340 - 19968: 0xD8A9, + 39341 - 19968: 0xE5DF, + 39342 - 19968: 0xF9A7, + 39345 - 19968: 0xF6EE, + 39347 - 19968: 0xF6CC, + 39348 - 19968: 0xE2F8, + 39353 - 19968: 0xECF1, + 39361 - 19968: 0xDAE0, + 39376 - 19968: 0xF1D2, + 39377 - 19968: 0xD2CC, + 39378 - 19968: 0xCFCB, + 39381 - 19968: 0xCABD, + 39385 - 19968: 0xDDBF, + 39389 - 19968: 0xF6EF, + 39391 - 19968: 0xDEF9, + 39405 - 19968: 0xFAB4, + 39409 - 19968: 0xD5AD, + 39423 - 19968: 0xF1E7, + 39425 - 19968: 0xDEBE, + 39432 - 19968: 0xDCC0, + 39438 - 19968: 0xD1C8, + 39439 - 19968: 0xD1C9, + 39449 - 19968: 0xF8BE, + 39467 - 19968: 0xCBF6, + 39472 - 19968: 0xD4F9, + 39478 - 19968: 0xF5E2, + 39479 - 19968: 0xE1D3, + 39488 - 19968: 0xD8E9, + 39491 - 19968: 0xF8FE, + 39493 - 19968: 0xCFCC, + 39501 - 19968: 0xFDA4, + 39509 - 19968: 0xCEF6, + 39511 - 19968: 0xFAD0, + 39514 - 19968: 0xCCF3, + 39515 - 19968: 0xE6BE, + 39519 - 19968: 0xF6AE, + 39522 - 19968: 0xD5F0, + 39525 - 19968: 0xD1CA, + 39529 - 19968: 0xFCBE, + 39530 - 19968: 0xD5F1, + 39592 - 19968: 0xCDE9, + 39608 - 19968: 0xFAB5, + 39635 - 19968: 0xE2D0, + 39636 - 19968: 0xF4F7, + 39640 - 19968: 0xCDD4, + 39653 - 19968: 0xE7A3, + 39662 - 19968: 0xDBA5, + 39706 - 19968: 0xE2D1, + 39719 - 19968: 0xD7A2, + 39722 - 19968: 0xF7E3, + 39729 - 19968: 0xEAA6, + 39740 - 19968: 0xD0A1, + 39745 - 19968: 0xCEDA, + 39746 - 19968: 0xFBEB, + 39747 - 19968: 0xDBA6, + 39748 - 19968: 0xDBDE, + 39749 - 19968: 0xD8E5, + 39759 - 19968: 0xEAE0, + 39764 - 19968: 0xD8AA, + 39770 - 19968: 0xE5E0, + 39791 - 19968: 0xD6DB, + 39822 - 19968: 0xEFC6, + 39825 - 19968: 0xF8EA, + 39839 - 19968: 0xE4D5, + 39851 - 19968: 0xCEF7, + 39854 - 19968: 0xE0D8, + 39881 - 19968: 0xD7EF, + 39894 - 19968: 0xF4ED, + 39908 - 19968: 0xCDE6, + 39912 - 19968: 0xCCF4, + 39949 - 19968: 0xF5E3, + 39952 - 19968: 0xE4CA, + 39954 - 19968: 0xDCE1, + 39957 - 19968: 0xF9C8, + 39973 - 19968: 0xFCBF, + 39986 - 19968: 0xE8A7, + 39995 - 19968: 0xD8C4, + 40007 - 19968: 0xCBBE, + 40009 - 19968: 0xDCAE, + 40023 - 19968: 0xD7F7, + 40165 - 19968: 0xF0E8, + 40167 - 19968: 0xDDC0, + 40169 - 19968: 0xCFCD, + 40179 - 19968: 0xDCF3, + 40180 - 19968: 0xD9B0, + 40182 - 19968: 0xE6E9, + 40201 - 19968: 0xE4BC, + 40219 - 19968: 0xEAC4, + 40230 - 19968: 0xE4EC, + 40232 - 19968: 0xE4E5, + 40251 - 19968: 0xFBF8, + 40273 - 19968: 0xCCBB, + 40285 - 19968: 0xE4BD, + 40288 - 19968: 0xCDDC, + 40289 - 19968: 0xD9F7, + 40300 - 19968: 0xDDDF, + 40306 - 19968: 0xEDCE, + 40361 - 19968: 0xD9D0, + 40367 - 19968: 0xE5A3, + 40372 - 19968: 0xF9CD, + 40388 - 19968: 0xCDAE, + 40407 - 19968: 0xCFCE, + 40434 - 19968: 0xF6AF, + 40440 - 19968: 0xFDD3, + 40441 - 19968: 0xEBED, + 40442 - 19968: 0xD6DC, + 40474 - 19968: 0xE5A4, + 40478 - 19968: 0xD5B6, + 40565 - 19968: 0xD6DD, + 40569 - 19968: 0xF9E9, + 40573 - 19968: 0xE7A4, + 40575 - 19968: 0xD6E3, + 40594 - 19968: 0xD1CB, + 40595 - 19968: 0xD6E4, + 40599 - 19968: 0xD5F2, + 40605 - 19968: 0xDEFA, + 40607 - 19968: 0xD7F8, + 40613 - 19968: 0xD8EA, + 40628 - 19968: 0xCFD5, + 40629 - 19968: 0xD8FD, + 40635 - 19968: 0xD8AB, + 40638 - 19968: 0xFDCB, + 40643 - 19968: 0xFCDC, + 40653 - 19968: 0xE0A8, + 40654 - 19968: 0xD5F3, + 40657 - 19968: 0xFDD9, + 40660 - 19968: 0xCCA3, + 40664 - 19968: 0xD9F9, + 40667 - 19968: 0xD3EA, + 40668 - 19968: 0xF5F5, + 40670 - 19968: 0xEFC7, + 40680 - 19968: 0xD3DA, + 40692 - 19968: 0xDABD, + 40711 - 19968: 0xE8A8, + 40712 - 19968: 0xDCAF, + 40718 - 19968: 0xF0A3, + 40723 - 19968: 0xCDD5, + 40736 - 19968: 0xE0A9, + 40763 - 19968: 0xDEAC, + 40778 - 19968: 0xF0BA, + 40779 - 19968: 0xEEB1, + 40782 - 19968: 0xEEB2, + 40786 - 19968: 0xF6CD, + 40799 - 19968: 0xEED2, + 40801 - 19968: 0xD6C6, + 40807 - 19968: 0xE0E5, + 40810 - 19968: 0xF3BB, + 40812 - 19968: 0xE5E1, + 40823 - 19968: 0xE4CB, + 40845 - 19968: 0xD7A3, + 40848 - 19968: 0xDBC2, + 40853 - 19968: 0xCAFE, + 40860 - 19968: 0xCFCF, +} + +const encode1Low, encode1High = 44032, 55204 + +var encode1 = [...]uint16{ + 44032 - 44032: 0xB0A1, + 44033 - 44032: 0xB0A2, + 44034 - 44032: 0x8141, + 44035 - 44032: 0x8142, + 44036 - 44032: 0xB0A3, + 44037 - 44032: 0x8143, + 44038 - 44032: 0x8144, + 44039 - 44032: 0xB0A4, + 44040 - 44032: 0xB0A5, + 44041 - 44032: 0xB0A6, + 44042 - 44032: 0xB0A7, + 44043 - 44032: 0x8145, + 44044 - 44032: 0x8146, + 44045 - 44032: 0x8147, + 44046 - 44032: 0x8148, + 44047 - 44032: 0x8149, + 44048 - 44032: 0xB0A8, + 44049 - 44032: 0xB0A9, + 44050 - 44032: 0xB0AA, + 44051 - 44032: 0xB0AB, + 44052 - 44032: 0xB0AC, + 44053 - 44032: 0xB0AD, + 44054 - 44032: 0xB0AE, + 44055 - 44032: 0xB0AF, + 44056 - 44032: 0x814A, + 44057 - 44032: 0xB0B0, + 44058 - 44032: 0xB0B1, + 44059 - 44032: 0xB0B2, + 44060 - 44032: 0xB0B3, + 44061 - 44032: 0xB0B4, + 44062 - 44032: 0x814B, + 44063 - 44032: 0x814C, + 44064 - 44032: 0xB0B5, + 44065 - 44032: 0x814D, + 44066 - 44032: 0x814E, + 44067 - 44032: 0x814F, + 44068 - 44032: 0xB0B6, + 44069 - 44032: 0x8150, + 44070 - 44032: 0x8151, + 44071 - 44032: 0x8152, + 44072 - 44032: 0x8153, + 44073 - 44032: 0x8154, + 44074 - 44032: 0x8155, + 44075 - 44032: 0x8156, + 44076 - 44032: 0xB0B7, + 44077 - 44032: 0xB0B8, + 44078 - 44032: 0x8157, + 44079 - 44032: 0xB0B9, + 44080 - 44032: 0xB0BA, + 44081 - 44032: 0xB0BB, + 44082 - 44032: 0x8158, + 44083 - 44032: 0x8159, + 44084 - 44032: 0x815A, + 44085 - 44032: 0x8161, + 44086 - 44032: 0x8162, + 44087 - 44032: 0x8163, + 44088 - 44032: 0xB0BC, + 44089 - 44032: 0xB0BD, + 44090 - 44032: 0x8164, + 44091 - 44032: 0x8165, + 44092 - 44032: 0xB0BE, + 44093 - 44032: 0x8166, + 44094 - 44032: 0x8167, + 44095 - 44032: 0x8168, + 44096 - 44032: 0xB0BF, + 44097 - 44032: 0x8169, + 44098 - 44032: 0x816A, + 44099 - 44032: 0x816B, + 44100 - 44032: 0x816C, + 44101 - 44032: 0x816D, + 44102 - 44032: 0x816E, + 44103 - 44032: 0x816F, + 44104 - 44032: 0x8170, + 44105 - 44032: 0x8171, + 44106 - 44032: 0x8172, + 44107 - 44032: 0xB0C0, + 44108 - 44032: 0x8173, + 44109 - 44032: 0xB0C1, + 44110 - 44032: 0x8174, + 44111 - 44032: 0x8175, + 44112 - 44032: 0x8176, + 44113 - 44032: 0x8177, + 44114 - 44032: 0x8178, + 44115 - 44032: 0x8179, + 44116 - 44032: 0xB0C2, + 44117 - 44032: 0x817A, + 44118 - 44032: 0x8181, + 44119 - 44032: 0x8182, + 44120 - 44032: 0xB0C3, + 44121 - 44032: 0x8183, + 44122 - 44032: 0x8184, + 44123 - 44032: 0x8185, + 44124 - 44032: 0xB0C4, + 44125 - 44032: 0x8186, + 44126 - 44032: 0x8187, + 44127 - 44032: 0x8188, + 44128 - 44032: 0x8189, + 44129 - 44032: 0x818A, + 44130 - 44032: 0x818B, + 44131 - 44032: 0x818C, + 44132 - 44032: 0x818D, + 44133 - 44032: 0x818E, + 44134 - 44032: 0x818F, + 44135 - 44032: 0x8190, + 44136 - 44032: 0x8191, + 44137 - 44032: 0x8192, + 44138 - 44032: 0x8193, + 44139 - 44032: 0x8194, + 44140 - 44032: 0x8195, + 44141 - 44032: 0x8196, + 44142 - 44032: 0x8197, + 44143 - 44032: 0x8198, + 44144 - 44032: 0xB0C5, + 44145 - 44032: 0xB0C6, + 44146 - 44032: 0x8199, + 44147 - 44032: 0x819A, + 44148 - 44032: 0xB0C7, + 44149 - 44032: 0x819B, + 44150 - 44032: 0x819C, + 44151 - 44032: 0xB0C8, + 44152 - 44032: 0xB0C9, + 44153 - 44032: 0x819D, + 44154 - 44032: 0xB0CA, + 44155 - 44032: 0x819E, + 44156 - 44032: 0x819F, + 44157 - 44032: 0x81A0, + 44158 - 44032: 0x81A1, + 44159 - 44032: 0x81A2, + 44160 - 44032: 0xB0CB, + 44161 - 44032: 0xB0CC, + 44162 - 44032: 0x81A3, + 44163 - 44032: 0xB0CD, + 44164 - 44032: 0xB0CE, + 44165 - 44032: 0xB0CF, + 44166 - 44032: 0xB0D0, + 44167 - 44032: 0x81A4, + 44168 - 44032: 0x81A5, + 44169 - 44032: 0xB0D1, + 44170 - 44032: 0xB0D2, + 44171 - 44032: 0xB0D3, + 44172 - 44032: 0xB0D4, + 44173 - 44032: 0x81A6, + 44174 - 44032: 0x81A7, + 44175 - 44032: 0x81A8, + 44176 - 44032: 0xB0D5, + 44177 - 44032: 0x81A9, + 44178 - 44032: 0x81AA, + 44179 - 44032: 0x81AB, + 44180 - 44032: 0xB0D6, + 44181 - 44032: 0x81AC, + 44182 - 44032: 0x81AD, + 44183 - 44032: 0x81AE, + 44184 - 44032: 0x81AF, + 44185 - 44032: 0x81B0, + 44186 - 44032: 0x81B1, + 44187 - 44032: 0x81B2, + 44188 - 44032: 0xB0D7, + 44189 - 44032: 0xB0D8, + 44190 - 44032: 0x81B3, + 44191 - 44032: 0xB0D9, + 44192 - 44032: 0xB0DA, + 44193 - 44032: 0xB0DB, + 44194 - 44032: 0x81B4, + 44195 - 44032: 0x81B5, + 44196 - 44032: 0x81B6, + 44197 - 44032: 0x81B7, + 44198 - 44032: 0x81B8, + 44199 - 44032: 0x81B9, + 44200 - 44032: 0xB0DC, + 44201 - 44032: 0xB0DD, + 44202 - 44032: 0xB0DE, + 44203 - 44032: 0x81BA, + 44204 - 44032: 0xB0DF, + 44205 - 44032: 0x81BB, + 44206 - 44032: 0x81BC, + 44207 - 44032: 0xB0E0, + 44208 - 44032: 0xB0E1, + 44209 - 44032: 0x81BD, + 44210 - 44032: 0x81BE, + 44211 - 44032: 0x81BF, + 44212 - 44032: 0x81C0, + 44213 - 44032: 0x81C1, + 44214 - 44032: 0x81C2, + 44215 - 44032: 0x81C3, + 44216 - 44032: 0xB0E2, + 44217 - 44032: 0xB0E3, + 44218 - 44032: 0x81C4, + 44219 - 44032: 0xB0E4, + 44220 - 44032: 0xB0E5, + 44221 - 44032: 0xB0E6, + 44222 - 44032: 0x81C5, + 44223 - 44032: 0x81C6, + 44224 - 44032: 0x81C7, + 44225 - 44032: 0xB0E7, + 44226 - 44032: 0x81C8, + 44227 - 44032: 0x81C9, + 44228 - 44032: 0xB0E8, + 44229 - 44032: 0x81CA, + 44230 - 44032: 0x81CB, + 44231 - 44032: 0x81CC, + 44232 - 44032: 0xB0E9, + 44233 - 44032: 0x81CD, + 44234 - 44032: 0x81CE, + 44235 - 44032: 0x81CF, + 44236 - 44032: 0xB0EA, + 44237 - 44032: 0x81D0, + 44238 - 44032: 0x81D1, + 44239 - 44032: 0x81D2, + 44240 - 44032: 0x81D3, + 44241 - 44032: 0x81D4, + 44242 - 44032: 0x81D5, + 44243 - 44032: 0x81D6, + 44244 - 44032: 0x81D7, + 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54885 - 44032: 0xC364, + 54886 - 44032: 0xC365, + 54887 - 44032: 0xC8B1, + 54888 - 44032: 0xC366, + 54889 - 44032: 0xC8B2, + 54890 - 44032: 0xC367, + 54891 - 44032: 0xC368, + 54892 - 44032: 0xC369, + 54893 - 44032: 0xC36A, + 54894 - 44032: 0xC36B, + 54895 - 44032: 0xC36C, + 54896 - 44032: 0xC8B3, + 54897 - 44032: 0xC8B4, + 54898 - 44032: 0xC36D, + 54899 - 44032: 0xC36E, + 54900 - 44032: 0xC8B5, + 54901 - 44032: 0xC36F, + 54902 - 44032: 0xC370, + 54903 - 44032: 0xC371, + 54904 - 44032: 0xC372, + 54905 - 44032: 0xC373, + 54906 - 44032: 0xC374, + 54907 - 44032: 0xC375, + 54908 - 44032: 0xC376, + 54909 - 44032: 0xC377, + 54910 - 44032: 0xC378, + 54911 - 44032: 0xC379, + 54912 - 44032: 0xC37A, + 54913 - 44032: 0xC381, + 54914 - 44032: 0xC382, + 54915 - 44032: 0xC8B6, + 54916 - 44032: 0xC383, + 54917 - 44032: 0xC8B7, + 54918 - 44032: 0xC384, + 54919 - 44032: 0xC385, + 54920 - 44032: 0xC386, + 54921 - 44032: 0xC387, + 54922 - 44032: 0xC388, + 54923 - 44032: 0xC389, + 54924 - 44032: 0xC8B8, + 54925 - 44032: 0xC8B9, + 54926 - 44032: 0xC38A, + 54927 - 44032: 0xC38B, + 54928 - 44032: 0xC8BA, + 54929 - 44032: 0xC38C, + 54930 - 44032: 0xC38D, + 54931 - 44032: 0xC38E, + 54932 - 44032: 0xC8BB, + 54933 - 44032: 0xC38F, + 54934 - 44032: 0xC390, + 54935 - 44032: 0xC391, + 54936 - 44032: 0xC392, + 54937 - 44032: 0xC393, + 54938 - 44032: 0xC394, + 54939 - 44032: 0xC395, + 54940 - 44032: 0xC396, + 54941 - 44032: 0xC8BC, + 54942 - 44032: 0xC397, + 54943 - 44032: 0xC8BD, + 54944 - 44032: 0xC398, + 54945 - 44032: 0xC8BE, + 54946 - 44032: 0xC399, + 54947 - 44032: 0xC39A, + 54948 - 44032: 0xC39B, + 54949 - 44032: 0xC39C, + 54950 - 44032: 0xC39D, + 54951 - 44032: 0xC39E, + 54952 - 44032: 0xC8BF, + 54953 - 44032: 0xC39F, + 54954 - 44032: 0xC3A0, + 54955 - 44032: 0xC441, + 54956 - 44032: 0xC8C0, + 54957 - 44032: 0xC442, + 54958 - 44032: 0xC443, + 54959 - 44032: 0xC444, + 54960 - 44032: 0xC8C1, + 54961 - 44032: 0xC445, + 54962 - 44032: 0xC446, + 54963 - 44032: 0xC447, + 54964 - 44032: 0xC448, + 54965 - 44032: 0xC449, + 54966 - 44032: 0xC44A, + 54967 - 44032: 0xC44B, + 54968 - 44032: 0xC44C, + 54969 - 44032: 0xC8C2, + 54970 - 44032: 0xC44D, + 54971 - 44032: 0xC8C3, + 54972 - 44032: 0xC44E, + 54973 - 44032: 0xC44F, + 54974 - 44032: 0xC450, + 54975 - 44032: 0xC451, + 54976 - 44032: 0xC452, + 54977 - 44032: 0xC453, + 54978 - 44032: 0xC454, + 54979 - 44032: 0xC455, + 54980 - 44032: 0xC8C4, + 54981 - 44032: 0xC8C5, + 54982 - 44032: 0xC456, + 54983 - 44032: 0xC457, + 54984 - 44032: 0xC8C6, + 54985 - 44032: 0xC458, + 54986 - 44032: 0xC459, + 54987 - 44032: 0xC45A, + 54988 - 44032: 0xC8C7, + 54989 - 44032: 0xC461, + 54990 - 44032: 0xC462, + 54991 - 44032: 0xC463, + 54992 - 44032: 0xC464, + 54993 - 44032: 0xC8C8, + 54994 - 44032: 0xC465, + 54995 - 44032: 0xC466, + 54996 - 44032: 0xC8C9, + 54997 - 44032: 0xC467, + 54998 - 44032: 0xC468, + 54999 - 44032: 0xC8CA, + 55000 - 44032: 0xC469, + 55001 - 44032: 0xC8CB, + 55002 - 44032: 0xC46A, + 55003 - 44032: 0xC46B, + 55004 - 44032: 0xC46C, + 55005 - 44032: 0xC46D, + 55006 - 44032: 0xC46E, + 55007 - 44032: 0xC46F, + 55008 - 44032: 0xC8CC, + 55009 - 44032: 0xC470, + 55010 - 44032: 0xC471, + 55011 - 44032: 0xC472, + 55012 - 44032: 0xC8CD, + 55013 - 44032: 0xC473, + 55014 - 44032: 0xC474, + 55015 - 44032: 0xC475, + 55016 - 44032: 0xC8CE, + 55017 - 44032: 0xC476, + 55018 - 44032: 0xC477, + 55019 - 44032: 0xC478, + 55020 - 44032: 0xC479, + 55021 - 44032: 0xC47A, + 55022 - 44032: 0xC481, + 55023 - 44032: 0xC482, + 55024 - 44032: 0xC8CF, + 55025 - 44032: 0xC483, + 55026 - 44032: 0xC484, + 55027 - 44032: 0xC485, + 55028 - 44032: 0xC486, + 55029 - 44032: 0xC8D0, + 55030 - 44032: 0xC487, + 55031 - 44032: 0xC488, + 55032 - 44032: 0xC489, + 55033 - 44032: 0xC48A, + 55034 - 44032: 0xC48B, + 55035 - 44032: 0xC48C, + 55036 - 44032: 0xC8D1, + 55037 - 44032: 0xC8D2, + 55038 - 44032: 0xC48D, + 55039 - 44032: 0xC48E, + 55040 - 44032: 0xC8D3, + 55041 - 44032: 0xC48F, + 55042 - 44032: 0xC490, + 55043 - 44032: 0xC491, + 55044 - 44032: 0xC8D4, + 55045 - 44032: 0xC492, + 55046 - 44032: 0xC493, + 55047 - 44032: 0xC494, + 55048 - 44032: 0xC495, + 55049 - 44032: 0xC496, + 55050 - 44032: 0xC497, + 55051 - 44032: 0xC498, + 55052 - 44032: 0xC499, + 55053 - 44032: 0xC49A, + 55054 - 44032: 0xC49B, + 55055 - 44032: 0xC49C, + 55056 - 44032: 0xC49D, + 55057 - 44032: 0xC8D5, + 55058 - 44032: 0xC49E, + 55059 - 44032: 0xC49F, + 55060 - 44032: 0xC4A0, + 55061 - 44032: 0xC541, + 55062 - 44032: 0xC542, + 55063 - 44032: 0xC543, + 55064 - 44032: 0xC8D6, + 55065 - 44032: 0xC8D7, + 55066 - 44032: 0xC544, + 55067 - 44032: 0xC545, + 55068 - 44032: 0xC8D8, + 55069 - 44032: 0xC546, + 55070 - 44032: 0xC547, + 55071 - 44032: 0xC548, + 55072 - 44032: 0xC8D9, + 55073 - 44032: 0xC549, + 55074 - 44032: 0xC54A, + 55075 - 44032: 0xC54B, + 55076 - 44032: 0xC54C, + 55077 - 44032: 0xC54D, + 55078 - 44032: 0xC54E, + 55079 - 44032: 0xC54F, + 55080 - 44032: 0xC8DA, + 55081 - 44032: 0xC8DB, + 55082 - 44032: 0xC550, + 55083 - 44032: 0xC8DC, + 55084 - 44032: 0xC551, + 55085 - 44032: 0xC8DD, + 55086 - 44032: 0xC552, + 55087 - 44032: 0xC553, + 55088 - 44032: 0xC554, + 55089 - 44032: 0xC555, + 55090 - 44032: 0xC556, + 55091 - 44032: 0xC557, + 55092 - 44032: 0xC8DE, + 55093 - 44032: 0xC8DF, + 55094 - 44032: 0xC558, + 55095 - 44032: 0xC559, + 55096 - 44032: 0xC8E0, + 55097 - 44032: 0xC55A, + 55098 - 44032: 0xC561, + 55099 - 44032: 0xC562, + 55100 - 44032: 0xC8E1, + 55101 - 44032: 0xC563, + 55102 - 44032: 0xC564, + 55103 - 44032: 0xC565, + 55104 - 44032: 0xC566, + 55105 - 44032: 0xC567, + 55106 - 44032: 0xC568, + 55107 - 44032: 0xC569, + 55108 - 44032: 0xC8E2, + 55109 - 44032: 0xC56A, + 55110 - 44032: 0xC56B, + 55111 - 44032: 0xC8E3, + 55112 - 44032: 0xC56C, + 55113 - 44032: 0xC8E4, + 55114 - 44032: 0xC56D, + 55115 - 44032: 0xC56E, + 55116 - 44032: 0xC56F, + 55117 - 44032: 0xC570, + 55118 - 44032: 0xC571, + 55119 - 44032: 0xC572, + 55120 - 44032: 0xC8E5, + 55121 - 44032: 0xC8E6, + 55122 - 44032: 0xC573, + 55123 - 44032: 0xC574, + 55124 - 44032: 0xC8E7, + 55125 - 44032: 0xC575, + 55126 - 44032: 0xC8E8, + 55127 - 44032: 0xC8E9, + 55128 - 44032: 0xC8EA, + 55129 - 44032: 0xC8EB, + 55130 - 44032: 0xC576, + 55131 - 44032: 0xC577, + 55132 - 44032: 0xC578, + 55133 - 44032: 0xC579, + 55134 - 44032: 0xC57A, + 55135 - 44032: 0xC581, + 55136 - 44032: 0xC8EC, + 55137 - 44032: 0xC8ED, + 55138 - 44032: 0xC582, + 55139 - 44032: 0xC8EE, + 55140 - 44032: 0xC583, + 55141 - 44032: 0xC8EF, + 55142 - 44032: 0xC584, + 55143 - 44032: 0xC585, + 55144 - 44032: 0xC586, + 55145 - 44032: 0xC8F0, + 55146 - 44032: 0xC587, + 55147 - 44032: 0xC588, + 55148 - 44032: 0xC8F1, + 55149 - 44032: 0xC589, + 55150 - 44032: 0xC58A, + 55151 - 44032: 0xC58B, + 55152 - 44032: 0xC8F2, + 55153 - 44032: 0xC58C, + 55154 - 44032: 0xC58D, + 55155 - 44032: 0xC58E, + 55156 - 44032: 0xC8F3, + 55157 - 44032: 0xC58F, + 55158 - 44032: 0xC590, + 55159 - 44032: 0xC591, + 55160 - 44032: 0xC592, + 55161 - 44032: 0xC593, + 55162 - 44032: 0xC594, + 55163 - 44032: 0xC595, + 55164 - 44032: 0xC8F4, + 55165 - 44032: 0xC8F5, + 55166 - 44032: 0xC596, + 55167 - 44032: 0xC597, + 55168 - 44032: 0xC598, + 55169 - 44032: 0xC8F6, + 55170 - 44032: 0xC599, + 55171 - 44032: 0xC59A, + 55172 - 44032: 0xC59B, + 55173 - 44032: 0xC59C, + 55174 - 44032: 0xC59D, + 55175 - 44032: 0xC59E, + 55176 - 44032: 0xC8F7, + 55177 - 44032: 0xC8F8, + 55178 - 44032: 0xC59F, + 55179 - 44032: 0xC5A0, + 55180 - 44032: 0xC8F9, + 55181 - 44032: 0xC641, + 55182 - 44032: 0xC642, + 55183 - 44032: 0xC643, + 55184 - 44032: 0xC8FA, + 55185 - 44032: 0xC644, + 55186 - 44032: 0xC645, + 55187 - 44032: 0xC646, + 55188 - 44032: 0xC647, + 55189 - 44032: 0xC648, + 55190 - 44032: 0xC649, + 55191 - 44032: 0xC64A, + 55192 - 44032: 0xC8FB, + 55193 - 44032: 0xC8FC, + 55194 - 44032: 0xC64B, + 55195 - 44032: 0xC8FD, + 55196 - 44032: 0xC64C, + 55197 - 44032: 0xC8FE, + 55198 - 44032: 0xC64D, + 55199 - 44032: 0xC64E, + 55200 - 44032: 0xC64F, + 55201 - 44032: 0xC650, + 55202 - 44032: 0xC651, + 55203 - 44032: 0xC652, +} + +const encode2Low, encode2High = 8213, 9838 + +var encode2 = [...]uint16{ + 8213 - 8213: 0xA1AA, + 8216 - 8213: 0xA1AE, + 8217 - 8213: 0xA1AF, + 8220 - 8213: 0xA1B0, + 8221 - 8213: 0xA1B1, + 8224 - 8213: 0xA2D3, + 8225 - 8213: 0xA2D4, + 8229 - 8213: 0xA1A5, + 8230 - 8213: 0xA1A6, + 8240 - 8213: 0xA2B6, + 8242 - 8213: 0xA1C7, + 8243 - 8213: 0xA1C8, + 8251 - 8213: 0xA1D8, + 8308 - 8213: 0xA9F9, + 8319 - 8213: 0xA9FA, + 8321 - 8213: 0xA9FB, + 8322 - 8213: 0xA9FC, + 8323 - 8213: 0xA9FD, + 8324 - 8213: 0xA9FE, + 8364 - 8213: 0xA2E6, + 8451 - 8213: 0xA1C9, + 8457 - 8213: 0xA2B5, + 8467 - 8213: 0xA7A4, + 8470 - 8213: 0xA2E0, + 8481 - 8213: 0xA2E5, + 8482 - 8213: 0xA2E2, + 8486 - 8213: 0xA7D9, + 8491 - 8213: 0xA1CA, + 8531 - 8213: 0xA8F7, + 8532 - 8213: 0xA8F8, + 8539 - 8213: 0xA8FB, + 8540 - 8213: 0xA8FC, + 8541 - 8213: 0xA8FD, + 8542 - 8213: 0xA8FE, + 8544 - 8213: 0xA5B0, + 8545 - 8213: 0xA5B1, + 8546 - 8213: 0xA5B2, + 8547 - 8213: 0xA5B3, + 8548 - 8213: 0xA5B4, + 8549 - 8213: 0xA5B5, + 8550 - 8213: 0xA5B6, + 8551 - 8213: 0xA5B7, + 8552 - 8213: 0xA5B8, + 8553 - 8213: 0xA5B9, + 8560 - 8213: 0xA5A1, + 8561 - 8213: 0xA5A2, + 8562 - 8213: 0xA5A3, + 8563 - 8213: 0xA5A4, + 8564 - 8213: 0xA5A5, + 8565 - 8213: 0xA5A6, + 8566 - 8213: 0xA5A7, + 8567 - 8213: 0xA5A8, + 8568 - 8213: 0xA5A9, + 8569 - 8213: 0xA5AA, + 8592 - 8213: 0xA1E7, + 8593 - 8213: 0xA1E8, + 8594 - 8213: 0xA1E6, + 8595 - 8213: 0xA1E9, + 8596 - 8213: 0xA1EA, + 8597 - 8213: 0xA2D5, + 8598 - 8213: 0xA2D8, + 8599 - 8213: 0xA2D6, + 8600 - 8213: 0xA2D9, + 8601 - 8213: 0xA2D7, + 8658 - 8213: 0xA2A1, + 8660 - 8213: 0xA2A2, + 8704 - 8213: 0xA2A3, + 8706 - 8213: 0xA1D3, + 8707 - 8213: 0xA2A4, + 8711 - 8213: 0xA1D4, + 8712 - 8213: 0xA1F4, + 8715 - 8213: 0xA1F5, + 8719 - 8213: 0xA2B3, + 8721 - 8213: 0xA2B2, + 8730 - 8213: 0xA1EE, + 8733 - 8213: 0xA1F0, + 8734 - 8213: 0xA1C4, + 8736 - 8213: 0xA1D0, + 8741 - 8213: 0xA1AB, + 8743 - 8213: 0xA1FC, + 8744 - 8213: 0xA1FD, + 8745 - 8213: 0xA1FB, + 8746 - 8213: 0xA1FA, + 8747 - 8213: 0xA1F2, + 8748 - 8213: 0xA1F3, + 8750 - 8213: 0xA2B1, + 8756 - 8213: 0xA1C5, + 8757 - 8213: 0xA1F1, + 8764 - 8213: 0xA1AD, + 8765 - 8213: 0xA1EF, + 8786 - 8213: 0xA1D6, + 8800 - 8213: 0xA1C1, + 8801 - 8213: 0xA1D5, + 8804 - 8213: 0xA1C2, + 8805 - 8213: 0xA1C3, + 8810 - 8213: 0xA1EC, + 8811 - 8213: 0xA1ED, + 8834 - 8213: 0xA1F8, + 8835 - 8213: 0xA1F9, + 8838 - 8213: 0xA1F6, + 8839 - 8213: 0xA1F7, + 8857 - 8213: 0xA2C1, + 8869 - 8213: 0xA1D1, + 8978 - 8213: 0xA1D2, + 9312 - 8213: 0xA8E7, + 9313 - 8213: 0xA8E8, + 9314 - 8213: 0xA8E9, + 9315 - 8213: 0xA8EA, + 9316 - 8213: 0xA8EB, + 9317 - 8213: 0xA8EC, + 9318 - 8213: 0xA8ED, + 9319 - 8213: 0xA8EE, + 9320 - 8213: 0xA8EF, + 9321 - 8213: 0xA8F0, + 9322 - 8213: 0xA8F1, + 9323 - 8213: 0xA8F2, + 9324 - 8213: 0xA8F3, + 9325 - 8213: 0xA8F4, + 9326 - 8213: 0xA8F5, + 9332 - 8213: 0xA9E7, + 9333 - 8213: 0xA9E8, + 9334 - 8213: 0xA9E9, + 9335 - 8213: 0xA9EA, + 9336 - 8213: 0xA9EB, + 9337 - 8213: 0xA9EC, + 9338 - 8213: 0xA9ED, + 9339 - 8213: 0xA9EE, + 9340 - 8213: 0xA9EF, + 9341 - 8213: 0xA9F0, + 9342 - 8213: 0xA9F1, + 9343 - 8213: 0xA9F2, + 9344 - 8213: 0xA9F3, + 9345 - 8213: 0xA9F4, + 9346 - 8213: 0xA9F5, + 9372 - 8213: 0xA9CD, + 9373 - 8213: 0xA9CE, + 9374 - 8213: 0xA9CF, + 9375 - 8213: 0xA9D0, + 9376 - 8213: 0xA9D1, + 9377 - 8213: 0xA9D2, + 9378 - 8213: 0xA9D3, + 9379 - 8213: 0xA9D4, + 9380 - 8213: 0xA9D5, + 9381 - 8213: 0xA9D6, + 9382 - 8213: 0xA9D7, + 9383 - 8213: 0xA9D8, + 9384 - 8213: 0xA9D9, + 9385 - 8213: 0xA9DA, + 9386 - 8213: 0xA9DB, + 9387 - 8213: 0xA9DC, + 9388 - 8213: 0xA9DD, + 9389 - 8213: 0xA9DE, + 9390 - 8213: 0xA9DF, + 9391 - 8213: 0xA9E0, + 9392 - 8213: 0xA9E1, + 9393 - 8213: 0xA9E2, + 9394 - 8213: 0xA9E3, + 9395 - 8213: 0xA9E4, + 9396 - 8213: 0xA9E5, + 9397 - 8213: 0xA9E6, + 9424 - 8213: 0xA8CD, + 9425 - 8213: 0xA8CE, + 9426 - 8213: 0xA8CF, + 9427 - 8213: 0xA8D0, + 9428 - 8213: 0xA8D1, + 9429 - 8213: 0xA8D2, + 9430 - 8213: 0xA8D3, + 9431 - 8213: 0xA8D4, + 9432 - 8213: 0xA8D5, + 9433 - 8213: 0xA8D6, + 9434 - 8213: 0xA8D7, + 9435 - 8213: 0xA8D8, + 9436 - 8213: 0xA8D9, + 9437 - 8213: 0xA8DA, + 9438 - 8213: 0xA8DB, + 9439 - 8213: 0xA8DC, + 9440 - 8213: 0xA8DD, + 9441 - 8213: 0xA8DE, + 9442 - 8213: 0xA8DF, + 9443 - 8213: 0xA8E0, + 9444 - 8213: 0xA8E1, + 9445 - 8213: 0xA8E2, + 9446 - 8213: 0xA8E3, + 9447 - 8213: 0xA8E4, + 9448 - 8213: 0xA8E5, + 9449 - 8213: 0xA8E6, + 9472 - 8213: 0xA6A1, + 9473 - 8213: 0xA6AC, + 9474 - 8213: 0xA6A2, + 9475 - 8213: 0xA6AD, + 9484 - 8213: 0xA6A3, + 9485 - 8213: 0xA6C8, + 9486 - 8213: 0xA6C7, + 9487 - 8213: 0xA6AE, + 9488 - 8213: 0xA6A4, + 9489 - 8213: 0xA6C2, + 9490 - 8213: 0xA6C1, + 9491 - 8213: 0xA6AF, + 9492 - 8213: 0xA6A6, + 9493 - 8213: 0xA6C6, + 9494 - 8213: 0xA6C5, + 9495 - 8213: 0xA6B1, + 9496 - 8213: 0xA6A5, + 9497 - 8213: 0xA6C4, + 9498 - 8213: 0xA6C3, + 9499 - 8213: 0xA6B0, + 9500 - 8213: 0xA6A7, + 9501 - 8213: 0xA6BC, + 9502 - 8213: 0xA6C9, + 9503 - 8213: 0xA6CA, + 9504 - 8213: 0xA6B7, + 9505 - 8213: 0xA6CB, + 9506 - 8213: 0xA6CC, + 9507 - 8213: 0xA6B2, + 9508 - 8213: 0xA6A9, + 9509 - 8213: 0xA6BE, + 9510 - 8213: 0xA6CD, + 9511 - 8213: 0xA6CE, + 9512 - 8213: 0xA6B9, + 9513 - 8213: 0xA6CF, + 9514 - 8213: 0xA6D0, + 9515 - 8213: 0xA6B4, + 9516 - 8213: 0xA6A8, + 9517 - 8213: 0xA6D1, + 9518 - 8213: 0xA6D2, + 9519 - 8213: 0xA6B8, + 9520 - 8213: 0xA6BD, + 9521 - 8213: 0xA6D3, + 9522 - 8213: 0xA6D4, + 9523 - 8213: 0xA6B3, + 9524 - 8213: 0xA6AA, + 9525 - 8213: 0xA6D5, + 9526 - 8213: 0xA6D6, + 9527 - 8213: 0xA6BA, + 9528 - 8213: 0xA6BF, + 9529 - 8213: 0xA6D7, + 9530 - 8213: 0xA6D8, + 9531 - 8213: 0xA6B5, + 9532 - 8213: 0xA6AB, + 9533 - 8213: 0xA6D9, + 9534 - 8213: 0xA6DA, + 9535 - 8213: 0xA6BB, + 9536 - 8213: 0xA6DB, + 9537 - 8213: 0xA6DC, + 9538 - 8213: 0xA6C0, + 9539 - 8213: 0xA6DD, + 9540 - 8213: 0xA6DE, + 9541 - 8213: 0xA6DF, + 9542 - 8213: 0xA6E0, + 9543 - 8213: 0xA6E1, + 9544 - 8213: 0xA6E2, + 9545 - 8213: 0xA6E3, + 9546 - 8213: 0xA6E4, + 9547 - 8213: 0xA6B6, + 9618 - 8213: 0xA2C6, + 9632 - 8213: 0xA1E1, + 9633 - 8213: 0xA1E0, + 9635 - 8213: 0xA2C3, + 9636 - 8213: 0xA2C7, + 9637 - 8213: 0xA2C8, + 9638 - 8213: 0xA2CB, + 9639 - 8213: 0xA2CA, + 9640 - 8213: 0xA2C9, + 9641 - 8213: 0xA2CC, + 9650 - 8213: 0xA1E3, + 9651 - 8213: 0xA1E2, + 9654 - 8213: 0xA2BA, + 9655 - 8213: 0xA2B9, + 9660 - 8213: 0xA1E5, + 9661 - 8213: 0xA1E4, + 9664 - 8213: 0xA2B8, + 9665 - 8213: 0xA2B7, + 9670 - 8213: 0xA1DF, + 9671 - 8213: 0xA1DE, + 9672 - 8213: 0xA2C2, + 9675 - 8213: 0xA1DB, + 9678 - 8213: 0xA1DD, + 9679 - 8213: 0xA1DC, + 9680 - 8213: 0xA2C4, + 9681 - 8213: 0xA2C5, + 9733 - 8213: 0xA1DA, + 9734 - 8213: 0xA1D9, + 9742 - 8213: 0xA2CF, + 9743 - 8213: 0xA2CE, + 9756 - 8213: 0xA2D0, + 9758 - 8213: 0xA2D1, + 9792 - 8213: 0xA1CF, + 9794 - 8213: 0xA1CE, + 9824 - 8213: 0xA2BC, + 9825 - 8213: 0xA2BD, + 9827 - 8213: 0xA2C0, + 9828 - 8213: 0xA2BB, + 9829 - 8213: 0xA2BE, + 9831 - 8213: 0xA2BF, + 9832 - 8213: 0xA2CD, + 9833 - 8213: 0xA2DB, + 9834 - 8213: 0xA2DC, + 9836 - 8213: 0xA2DD, + 9837 - 8213: 0xA2DA, +} + +const encode3Low, encode3High = 12288, 13278 + +var encode3 = [...]uint16{ + 12288 - 12288: 0xA1A1, + 12289 - 12288: 0xA1A2, + 12290 - 12288: 0xA1A3, + 12291 - 12288: 0xA1A8, + 12296 - 12288: 0xA1B4, + 12297 - 12288: 0xA1B5, + 12298 - 12288: 0xA1B6, + 12299 - 12288: 0xA1B7, + 12300 - 12288: 0xA1B8, + 12301 - 12288: 0xA1B9, + 12302 - 12288: 0xA1BA, + 12303 - 12288: 0xA1BB, + 12304 - 12288: 0xA1BC, + 12305 - 12288: 0xA1BD, + 12307 - 12288: 0xA1EB, + 12308 - 12288: 0xA1B2, + 12309 - 12288: 0xA1B3, + 12353 - 12288: 0xAAA1, + 12354 - 12288: 0xAAA2, + 12355 - 12288: 0xAAA3, + 12356 - 12288: 0xAAA4, + 12357 - 12288: 0xAAA5, + 12358 - 12288: 0xAAA6, + 12359 - 12288: 0xAAA7, + 12360 - 12288: 0xAAA8, + 12361 - 12288: 0xAAA9, + 12362 - 12288: 0xAAAA, + 12363 - 12288: 0xAAAB, + 12364 - 12288: 0xAAAC, + 12365 - 12288: 0xAAAD, + 12366 - 12288: 0xAAAE, + 12367 - 12288: 0xAAAF, + 12368 - 12288: 0xAAB0, + 12369 - 12288: 0xAAB1, + 12370 - 12288: 0xAAB2, + 12371 - 12288: 0xAAB3, + 12372 - 12288: 0xAAB4, + 12373 - 12288: 0xAAB5, + 12374 - 12288: 0xAAB6, + 12375 - 12288: 0xAAB7, + 12376 - 12288: 0xAAB8, + 12377 - 12288: 0xAAB9, + 12378 - 12288: 0xAABA, + 12379 - 12288: 0xAABB, + 12380 - 12288: 0xAABC, + 12381 - 12288: 0xAABD, + 12382 - 12288: 0xAABE, + 12383 - 12288: 0xAABF, + 12384 - 12288: 0xAAC0, + 12385 - 12288: 0xAAC1, + 12386 - 12288: 0xAAC2, + 12387 - 12288: 0xAAC3, + 12388 - 12288: 0xAAC4, + 12389 - 12288: 0xAAC5, + 12390 - 12288: 0xAAC6, + 12391 - 12288: 0xAAC7, + 12392 - 12288: 0xAAC8, + 12393 - 12288: 0xAAC9, + 12394 - 12288: 0xAACA, + 12395 - 12288: 0xAACB, + 12396 - 12288: 0xAACC, + 12397 - 12288: 0xAACD, + 12398 - 12288: 0xAACE, + 12399 - 12288: 0xAACF, + 12400 - 12288: 0xAAD0, + 12401 - 12288: 0xAAD1, + 12402 - 12288: 0xAAD2, + 12403 - 12288: 0xAAD3, + 12404 - 12288: 0xAAD4, + 12405 - 12288: 0xAAD5, + 12406 - 12288: 0xAAD6, + 12407 - 12288: 0xAAD7, + 12408 - 12288: 0xAAD8, + 12409 - 12288: 0xAAD9, + 12410 - 12288: 0xAADA, + 12411 - 12288: 0xAADB, + 12412 - 12288: 0xAADC, + 12413 - 12288: 0xAADD, + 12414 - 12288: 0xAADE, + 12415 - 12288: 0xAADF, + 12416 - 12288: 0xAAE0, + 12417 - 12288: 0xAAE1, + 12418 - 12288: 0xAAE2, + 12419 - 12288: 0xAAE3, + 12420 - 12288: 0xAAE4, + 12421 - 12288: 0xAAE5, + 12422 - 12288: 0xAAE6, + 12423 - 12288: 0xAAE7, + 12424 - 12288: 0xAAE8, + 12425 - 12288: 0xAAE9, + 12426 - 12288: 0xAAEA, + 12427 - 12288: 0xAAEB, + 12428 - 12288: 0xAAEC, + 12429 - 12288: 0xAAED, + 12430 - 12288: 0xAAEE, + 12431 - 12288: 0xAAEF, + 12432 - 12288: 0xAAF0, + 12433 - 12288: 0xAAF1, + 12434 - 12288: 0xAAF2, + 12435 - 12288: 0xAAF3, + 12449 - 12288: 0xABA1, + 12450 - 12288: 0xABA2, + 12451 - 12288: 0xABA3, + 12452 - 12288: 0xABA4, + 12453 - 12288: 0xABA5, + 12454 - 12288: 0xABA6, + 12455 - 12288: 0xABA7, + 12456 - 12288: 0xABA8, + 12457 - 12288: 0xABA9, + 12458 - 12288: 0xABAA, + 12459 - 12288: 0xABAB, + 12460 - 12288: 0xABAC, + 12461 - 12288: 0xABAD, + 12462 - 12288: 0xABAE, + 12463 - 12288: 0xABAF, + 12464 - 12288: 0xABB0, + 12465 - 12288: 0xABB1, + 12466 - 12288: 0xABB2, + 12467 - 12288: 0xABB3, + 12468 - 12288: 0xABB4, + 12469 - 12288: 0xABB5, + 12470 - 12288: 0xABB6, + 12471 - 12288: 0xABB7, + 12472 - 12288: 0xABB8, + 12473 - 12288: 0xABB9, + 12474 - 12288: 0xABBA, + 12475 - 12288: 0xABBB, + 12476 - 12288: 0xABBC, + 12477 - 12288: 0xABBD, + 12478 - 12288: 0xABBE, + 12479 - 12288: 0xABBF, + 12480 - 12288: 0xABC0, + 12481 - 12288: 0xABC1, + 12482 - 12288: 0xABC2, + 12483 - 12288: 0xABC3, + 12484 - 12288: 0xABC4, + 12485 - 12288: 0xABC5, + 12486 - 12288: 0xABC6, + 12487 - 12288: 0xABC7, + 12488 - 12288: 0xABC8, + 12489 - 12288: 0xABC9, + 12490 - 12288: 0xABCA, + 12491 - 12288: 0xABCB, + 12492 - 12288: 0xABCC, + 12493 - 12288: 0xABCD, + 12494 - 12288: 0xABCE, + 12495 - 12288: 0xABCF, + 12496 - 12288: 0xABD0, + 12497 - 12288: 0xABD1, + 12498 - 12288: 0xABD2, + 12499 - 12288: 0xABD3, + 12500 - 12288: 0xABD4, + 12501 - 12288: 0xABD5, + 12502 - 12288: 0xABD6, + 12503 - 12288: 0xABD7, + 12504 - 12288: 0xABD8, + 12505 - 12288: 0xABD9, + 12506 - 12288: 0xABDA, + 12507 - 12288: 0xABDB, + 12508 - 12288: 0xABDC, + 12509 - 12288: 0xABDD, + 12510 - 12288: 0xABDE, + 12511 - 12288: 0xABDF, + 12512 - 12288: 0xABE0, + 12513 - 12288: 0xABE1, + 12514 - 12288: 0xABE2, + 12515 - 12288: 0xABE3, + 12516 - 12288: 0xABE4, + 12517 - 12288: 0xABE5, + 12518 - 12288: 0xABE6, + 12519 - 12288: 0xABE7, + 12520 - 12288: 0xABE8, + 12521 - 12288: 0xABE9, + 12522 - 12288: 0xABEA, + 12523 - 12288: 0xABEB, + 12524 - 12288: 0xABEC, + 12525 - 12288: 0xABED, + 12526 - 12288: 0xABEE, + 12527 - 12288: 0xABEF, + 12528 - 12288: 0xABF0, + 12529 - 12288: 0xABF1, + 12530 - 12288: 0xABF2, + 12531 - 12288: 0xABF3, + 12532 - 12288: 0xABF4, + 12533 - 12288: 0xABF5, + 12534 - 12288: 0xABF6, + 12593 - 12288: 0xA4A1, + 12594 - 12288: 0xA4A2, + 12595 - 12288: 0xA4A3, + 12596 - 12288: 0xA4A4, + 12597 - 12288: 0xA4A5, + 12598 - 12288: 0xA4A6, + 12599 - 12288: 0xA4A7, + 12600 - 12288: 0xA4A8, + 12601 - 12288: 0xA4A9, + 12602 - 12288: 0xA4AA, + 12603 - 12288: 0xA4AB, + 12604 - 12288: 0xA4AC, + 12605 - 12288: 0xA4AD, + 12606 - 12288: 0xA4AE, + 12607 - 12288: 0xA4AF, + 12608 - 12288: 0xA4B0, + 12609 - 12288: 0xA4B1, + 12610 - 12288: 0xA4B2, + 12611 - 12288: 0xA4B3, + 12612 - 12288: 0xA4B4, + 12613 - 12288: 0xA4B5, + 12614 - 12288: 0xA4B6, + 12615 - 12288: 0xA4B7, + 12616 - 12288: 0xA4B8, + 12617 - 12288: 0xA4B9, + 12618 - 12288: 0xA4BA, + 12619 - 12288: 0xA4BB, + 12620 - 12288: 0xA4BC, + 12621 - 12288: 0xA4BD, + 12622 - 12288: 0xA4BE, + 12623 - 12288: 0xA4BF, + 12624 - 12288: 0xA4C0, + 12625 - 12288: 0xA4C1, + 12626 - 12288: 0xA4C2, + 12627 - 12288: 0xA4C3, + 12628 - 12288: 0xA4C4, + 12629 - 12288: 0xA4C5, + 12630 - 12288: 0xA4C6, + 12631 - 12288: 0xA4C7, + 12632 - 12288: 0xA4C8, + 12633 - 12288: 0xA4C9, + 12634 - 12288: 0xA4CA, + 12635 - 12288: 0xA4CB, + 12636 - 12288: 0xA4CC, + 12637 - 12288: 0xA4CD, + 12638 - 12288: 0xA4CE, + 12639 - 12288: 0xA4CF, + 12640 - 12288: 0xA4D0, + 12641 - 12288: 0xA4D1, + 12642 - 12288: 0xA4D2, + 12643 - 12288: 0xA4D3, + 12644 - 12288: 0xA4D4, + 12645 - 12288: 0xA4D5, + 12646 - 12288: 0xA4D6, + 12647 - 12288: 0xA4D7, + 12648 - 12288: 0xA4D8, + 12649 - 12288: 0xA4D9, + 12650 - 12288: 0xA4DA, + 12651 - 12288: 0xA4DB, + 12652 - 12288: 0xA4DC, + 12653 - 12288: 0xA4DD, + 12654 - 12288: 0xA4DE, + 12655 - 12288: 0xA4DF, + 12656 - 12288: 0xA4E0, + 12657 - 12288: 0xA4E1, + 12658 - 12288: 0xA4E2, + 12659 - 12288: 0xA4E3, + 12660 - 12288: 0xA4E4, + 12661 - 12288: 0xA4E5, + 12662 - 12288: 0xA4E6, + 12663 - 12288: 0xA4E7, + 12664 - 12288: 0xA4E8, + 12665 - 12288: 0xA4E9, + 12666 - 12288: 0xA4EA, + 12667 - 12288: 0xA4EB, + 12668 - 12288: 0xA4EC, + 12669 - 12288: 0xA4ED, + 12670 - 12288: 0xA4EE, + 12671 - 12288: 0xA4EF, + 12672 - 12288: 0xA4F0, + 12673 - 12288: 0xA4F1, + 12674 - 12288: 0xA4F2, + 12675 - 12288: 0xA4F3, + 12676 - 12288: 0xA4F4, + 12677 - 12288: 0xA4F5, + 12678 - 12288: 0xA4F6, + 12679 - 12288: 0xA4F7, + 12680 - 12288: 0xA4F8, + 12681 - 12288: 0xA4F9, + 12682 - 12288: 0xA4FA, + 12683 - 12288: 0xA4FB, + 12684 - 12288: 0xA4FC, + 12685 - 12288: 0xA4FD, + 12686 - 12288: 0xA4FE, + 12800 - 12288: 0xA9B1, + 12801 - 12288: 0xA9B2, + 12802 - 12288: 0xA9B3, + 12803 - 12288: 0xA9B4, + 12804 - 12288: 0xA9B5, + 12805 - 12288: 0xA9B6, + 12806 - 12288: 0xA9B7, + 12807 - 12288: 0xA9B8, + 12808 - 12288: 0xA9B9, + 12809 - 12288: 0xA9BA, + 12810 - 12288: 0xA9BB, + 12811 - 12288: 0xA9BC, + 12812 - 12288: 0xA9BD, + 12813 - 12288: 0xA9BE, + 12814 - 12288: 0xA9BF, + 12815 - 12288: 0xA9C0, + 12816 - 12288: 0xA9C1, + 12817 - 12288: 0xA9C2, + 12818 - 12288: 0xA9C3, + 12819 - 12288: 0xA9C4, + 12820 - 12288: 0xA9C5, + 12821 - 12288: 0xA9C6, + 12822 - 12288: 0xA9C7, + 12823 - 12288: 0xA9C8, + 12824 - 12288: 0xA9C9, + 12825 - 12288: 0xA9CA, + 12826 - 12288: 0xA9CB, + 12827 - 12288: 0xA9CC, + 12828 - 12288: 0xA2DF, + 12896 - 12288: 0xA8B1, + 12897 - 12288: 0xA8B2, + 12898 - 12288: 0xA8B3, + 12899 - 12288: 0xA8B4, + 12900 - 12288: 0xA8B5, + 12901 - 12288: 0xA8B6, + 12902 - 12288: 0xA8B7, + 12903 - 12288: 0xA8B8, + 12904 - 12288: 0xA8B9, + 12905 - 12288: 0xA8BA, + 12906 - 12288: 0xA8BB, + 12907 - 12288: 0xA8BC, + 12908 - 12288: 0xA8BD, + 12909 - 12288: 0xA8BE, + 12910 - 12288: 0xA8BF, + 12911 - 12288: 0xA8C0, + 12912 - 12288: 0xA8C1, + 12913 - 12288: 0xA8C2, + 12914 - 12288: 0xA8C3, + 12915 - 12288: 0xA8C4, + 12916 - 12288: 0xA8C5, + 12917 - 12288: 0xA8C6, + 12918 - 12288: 0xA8C7, + 12919 - 12288: 0xA8C8, + 12920 - 12288: 0xA8C9, + 12921 - 12288: 0xA8CA, + 12922 - 12288: 0xA8CB, + 12923 - 12288: 0xA8CC, + 12927 - 12288: 0xA2DE, + 13184 - 12288: 0xA7C9, + 13185 - 12288: 0xA7CA, + 13186 - 12288: 0xA7CB, + 13187 - 12288: 0xA7CC, + 13188 - 12288: 0xA7CD, + 13192 - 12288: 0xA7BA, + 13193 - 12288: 0xA7BB, + 13194 - 12288: 0xA7DC, + 13195 - 12288: 0xA7DD, + 13196 - 12288: 0xA7DE, + 13197 - 12288: 0xA7B6, + 13198 - 12288: 0xA7B7, + 13199 - 12288: 0xA7B8, + 13200 - 12288: 0xA7D4, + 13201 - 12288: 0xA7D5, + 13202 - 12288: 0xA7D6, + 13203 - 12288: 0xA7D7, + 13204 - 12288: 0xA7D8, + 13205 - 12288: 0xA7A1, + 13206 - 12288: 0xA7A2, + 13207 - 12288: 0xA7A3, + 13208 - 12288: 0xA7A5, + 13209 - 12288: 0xA7AB, + 13210 - 12288: 0xA7AC, + 13211 - 12288: 0xA7AD, + 13212 - 12288: 0xA7AE, + 13213 - 12288: 0xA7AF, + 13214 - 12288: 0xA7B0, + 13215 - 12288: 0xA7B1, + 13216 - 12288: 0xA7B2, + 13217 - 12288: 0xA7B3, + 13218 - 12288: 0xA7B4, + 13219 - 12288: 0xA7A7, + 13220 - 12288: 0xA7A8, + 13221 - 12288: 0xA7A9, + 13222 - 12288: 0xA7AA, + 13223 - 12288: 0xA7BD, + 13224 - 12288: 0xA7BE, + 13225 - 12288: 0xA7E5, + 13226 - 12288: 0xA7E6, + 13227 - 12288: 0xA7E7, + 13228 - 12288: 0xA7E8, + 13229 - 12288: 0xA7E1, + 13230 - 12288: 0xA7E2, + 13231 - 12288: 0xA7E3, + 13232 - 12288: 0xA7BF, + 13233 - 12288: 0xA7C0, + 13234 - 12288: 0xA7C1, + 13235 - 12288: 0xA7C2, + 13236 - 12288: 0xA7C3, + 13237 - 12288: 0xA7C4, + 13238 - 12288: 0xA7C5, + 13239 - 12288: 0xA7C6, + 13240 - 12288: 0xA7C7, + 13241 - 12288: 0xA7C8, + 13242 - 12288: 0xA7CE, + 13243 - 12288: 0xA7CF, + 13244 - 12288: 0xA7D0, + 13245 - 12288: 0xA7D1, + 13246 - 12288: 0xA7D2, + 13247 - 12288: 0xA7D3, + 13248 - 12288: 0xA7DA, + 13249 - 12288: 0xA7DB, + 13250 - 12288: 0xA2E3, + 13251 - 12288: 0xA7EC, + 13252 - 12288: 0xA7A6, + 13253 - 12288: 0xA7E0, + 13254 - 12288: 0xA7EF, + 13255 - 12288: 0xA2E1, + 13256 - 12288: 0xA7BC, + 13257 - 12288: 0xA7ED, + 13258 - 12288: 0xA7B5, + 13263 - 12288: 0xA7B9, + 13264 - 12288: 0xA7EA, + 13267 - 12288: 0xA7EB, + 13270 - 12288: 0xA7DF, + 13272 - 12288: 0xA2E4, + 13275 - 12288: 0xA7E4, + 13276 - 12288: 0xA7EE, + 13277 - 12288: 0xA7E9, +} + +const encode4Low, encode4High = 161, 1106 + +var encode4 = [...]uint16{ + 161 - 161: 0xA2AE, + 164 - 161: 0xA2B4, + 167 - 161: 0xA1D7, + 168 - 161: 0xA1A7, + 170 - 161: 0xA8A3, + 173 - 161: 0xA1A9, + 174 - 161: 0xA2E7, + 176 - 161: 0xA1C6, + 177 - 161: 0xA1BE, + 178 - 161: 0xA9F7, + 179 - 161: 0xA9F8, + 180 - 161: 0xA2A5, + 182 - 161: 0xA2D2, + 183 - 161: 0xA1A4, + 184 - 161: 0xA2AC, + 185 - 161: 0xA9F6, + 186 - 161: 0xA8AC, + 188 - 161: 0xA8F9, + 189 - 161: 0xA8F6, + 190 - 161: 0xA8FA, + 191 - 161: 0xA2AF, + 198 - 161: 0xA8A1, + 208 - 161: 0xA8A2, + 215 - 161: 0xA1BF, + 216 - 161: 0xA8AA, + 222 - 161: 0xA8AD, + 223 - 161: 0xA9AC, + 230 - 161: 0xA9A1, + 240 - 161: 0xA9A3, + 247 - 161: 0xA1C0, + 248 - 161: 0xA9AA, + 254 - 161: 0xA9AD, + 273 - 161: 0xA9A2, + 294 - 161: 0xA8A4, + 295 - 161: 0xA9A4, + 305 - 161: 0xA9A5, + 306 - 161: 0xA8A6, + 307 - 161: 0xA9A6, + 312 - 161: 0xA9A7, + 319 - 161: 0xA8A8, + 320 - 161: 0xA9A8, + 321 - 161: 0xA8A9, + 322 - 161: 0xA9A9, + 329 - 161: 0xA9B0, + 330 - 161: 0xA8AF, + 331 - 161: 0xA9AF, + 338 - 161: 0xA8AB, + 339 - 161: 0xA9AB, + 358 - 161: 0xA8AE, + 359 - 161: 0xA9AE, + 711 - 161: 0xA2A7, + 720 - 161: 0xA2B0, + 728 - 161: 0xA2A8, + 729 - 161: 0xA2AB, + 730 - 161: 0xA2AA, + 731 - 161: 0xA2AD, + 733 - 161: 0xA2A9, + 913 - 161: 0xA5C1, + 914 - 161: 0xA5C2, + 915 - 161: 0xA5C3, + 916 - 161: 0xA5C4, + 917 - 161: 0xA5C5, + 918 - 161: 0xA5C6, + 919 - 161: 0xA5C7, + 920 - 161: 0xA5C8, + 921 - 161: 0xA5C9, + 922 - 161: 0xA5CA, + 923 - 161: 0xA5CB, + 924 - 161: 0xA5CC, + 925 - 161: 0xA5CD, + 926 - 161: 0xA5CE, + 927 - 161: 0xA5CF, + 928 - 161: 0xA5D0, + 929 - 161: 0xA5D1, + 931 - 161: 0xA5D2, + 932 - 161: 0xA5D3, + 933 - 161: 0xA5D4, + 934 - 161: 0xA5D5, + 935 - 161: 0xA5D6, + 936 - 161: 0xA5D7, + 937 - 161: 0xA5D8, + 945 - 161: 0xA5E1, + 946 - 161: 0xA5E2, + 947 - 161: 0xA5E3, + 948 - 161: 0xA5E4, + 949 - 161: 0xA5E5, + 950 - 161: 0xA5E6, + 951 - 161: 0xA5E7, + 952 - 161: 0xA5E8, + 953 - 161: 0xA5E9, + 954 - 161: 0xA5EA, + 955 - 161: 0xA5EB, + 956 - 161: 0xA5EC, + 957 - 161: 0xA5ED, + 958 - 161: 0xA5EE, + 959 - 161: 0xA5EF, + 960 - 161: 0xA5F0, + 961 - 161: 0xA5F1, + 963 - 161: 0xA5F2, + 964 - 161: 0xA5F3, + 965 - 161: 0xA5F4, + 966 - 161: 0xA5F5, + 967 - 161: 0xA5F6, + 968 - 161: 0xA5F7, + 969 - 161: 0xA5F8, + 1025 - 161: 0xACA7, + 1040 - 161: 0xACA1, + 1041 - 161: 0xACA2, + 1042 - 161: 0xACA3, + 1043 - 161: 0xACA4, + 1044 - 161: 0xACA5, + 1045 - 161: 0xACA6, + 1046 - 161: 0xACA8, + 1047 - 161: 0xACA9, + 1048 - 161: 0xACAA, + 1049 - 161: 0xACAB, + 1050 - 161: 0xACAC, + 1051 - 161: 0xACAD, + 1052 - 161: 0xACAE, + 1053 - 161: 0xACAF, + 1054 - 161: 0xACB0, + 1055 - 161: 0xACB1, + 1056 - 161: 0xACB2, + 1057 - 161: 0xACB3, + 1058 - 161: 0xACB4, + 1059 - 161: 0xACB5, + 1060 - 161: 0xACB6, + 1061 - 161: 0xACB7, + 1062 - 161: 0xACB8, + 1063 - 161: 0xACB9, + 1064 - 161: 0xACBA, + 1065 - 161: 0xACBB, + 1066 - 161: 0xACBC, + 1067 - 161: 0xACBD, + 1068 - 161: 0xACBE, + 1069 - 161: 0xACBF, + 1070 - 161: 0xACC0, + 1071 - 161: 0xACC1, + 1072 - 161: 0xACD1, + 1073 - 161: 0xACD2, + 1074 - 161: 0xACD3, + 1075 - 161: 0xACD4, + 1076 - 161: 0xACD5, + 1077 - 161: 0xACD6, + 1078 - 161: 0xACD8, + 1079 - 161: 0xACD9, + 1080 - 161: 0xACDA, + 1081 - 161: 0xACDB, + 1082 - 161: 0xACDC, + 1083 - 161: 0xACDD, + 1084 - 161: 0xACDE, + 1085 - 161: 0xACDF, + 1086 - 161: 0xACE0, + 1087 - 161: 0xACE1, + 1088 - 161: 0xACE2, + 1089 - 161: 0xACE3, + 1090 - 161: 0xACE4, + 1091 - 161: 0xACE5, + 1092 - 161: 0xACE6, + 1093 - 161: 0xACE7, + 1094 - 161: 0xACE8, + 1095 - 161: 0xACE9, + 1096 - 161: 0xACEA, + 1097 - 161: 0xACEB, + 1098 - 161: 0xACEC, + 1099 - 161: 0xACED, + 1100 - 161: 0xACEE, + 1101 - 161: 0xACEF, + 1102 - 161: 0xACF0, + 1103 - 161: 0xACF1, + 1105 - 161: 0xACD7, +} + +const encode5Low, encode5High = 63744, 64012 + +var encode5 = [...]uint16{ + 63744 - 63744: 0xCBD0, + 63745 - 63744: 0xCBD6, + 63746 - 63744: 0xCBE7, + 63747 - 63744: 0xCDCF, + 63748 - 63744: 0xCDE8, + 63749 - 63744: 0xCEAD, + 63750 - 63744: 0xCFFB, + 63751 - 63744: 0xD0A2, + 63752 - 63744: 0xD0B8, + 63753 - 63744: 0xD0D0, + 63754 - 63744: 0xD0DD, + 63755 - 63744: 0xD1D4, + 63756 - 63744: 0xD1D5, + 63757 - 63744: 0xD1D8, + 63758 - 63744: 0xD1DB, + 63759 - 63744: 0xD1DC, + 63760 - 63744: 0xD1DD, + 63761 - 63744: 0xD1DE, + 63762 - 63744: 0xD1DF, + 63763 - 63744: 0xD1E0, + 63764 - 63744: 0xD1E2, + 63765 - 63744: 0xD1E3, + 63766 - 63744: 0xD1E4, + 63767 - 63744: 0xD1E5, + 63768 - 63744: 0xD1E6, + 63769 - 63744: 0xD1E8, + 63770 - 63744: 0xD1E9, + 63771 - 63744: 0xD1EA, + 63772 - 63744: 0xD1EB, + 63773 - 63744: 0xD1ED, + 63774 - 63744: 0xD1EF, + 63775 - 63744: 0xD1F0, + 63776 - 63744: 0xD1F2, + 63777 - 63744: 0xD1F6, + 63778 - 63744: 0xD1FA, + 63779 - 63744: 0xD1FC, + 63780 - 63744: 0xD1FD, + 63781 - 63744: 0xD1FE, + 63782 - 63744: 0xD2A2, + 63783 - 63744: 0xD2A3, + 63784 - 63744: 0xD2A7, + 63785 - 63744: 0xD2A8, + 63786 - 63744: 0xD2A9, + 63787 - 63744: 0xD2AA, + 63788 - 63744: 0xD2AB, + 63789 - 63744: 0xD2AD, + 63790 - 63744: 0xD2B2, + 63791 - 63744: 0xD2BE, + 63792 - 63744: 0xD2C2, + 63793 - 63744: 0xD2C3, + 63794 - 63744: 0xD2C4, + 63795 - 63744: 0xD2C6, + 63796 - 63744: 0xD2C7, + 63797 - 63744: 0xD2C8, + 63798 - 63744: 0xD2C9, + 63799 - 63744: 0xD2CA, + 63800 - 63744: 0xD2CB, + 63801 - 63744: 0xD2CD, + 63802 - 63744: 0xD2CE, + 63803 - 63744: 0xD2CF, + 63804 - 63744: 0xD2D0, + 63805 - 63744: 0xD2D1, + 63806 - 63744: 0xD2D2, + 63807 - 63744: 0xD2D3, + 63808 - 63744: 0xD2D4, + 63809 - 63744: 0xD2D5, + 63810 - 63744: 0xD2D6, + 63811 - 63744: 0xD2D7, + 63812 - 63744: 0xD2D9, + 63813 - 63744: 0xD2DA, + 63814 - 63744: 0xD2DE, + 63815 - 63744: 0xD2DF, + 63816 - 63744: 0xD2E1, + 63817 - 63744: 0xD2E2, + 63818 - 63744: 0xD2E4, + 63819 - 63744: 0xD2E5, + 63820 - 63744: 0xD2E6, + 63821 - 63744: 0xD2E7, + 63822 - 63744: 0xD2E8, + 63823 - 63744: 0xD2E9, + 63824 - 63744: 0xD2EA, + 63825 - 63744: 0xD2EB, + 63826 - 63744: 0xD2F0, + 63827 - 63744: 0xD2F1, + 63828 - 63744: 0xD2F2, + 63829 - 63744: 0xD2F3, + 63830 - 63744: 0xD2F4, + 63831 - 63744: 0xD2F5, + 63832 - 63744: 0xD2F7, + 63833 - 63744: 0xD2F8, + 63834 - 63744: 0xD4E6, + 63835 - 63744: 0xD4FC, + 63836 - 63744: 0xD5A5, + 63837 - 63744: 0xD5AB, + 63838 - 63744: 0xD5AE, + 63839 - 63744: 0xD6B8, + 63840 - 63744: 0xD6CD, + 63841 - 63744: 0xD7CB, + 63842 - 63744: 0xD7E4, + 63843 - 63744: 0xDBC5, + 63844 - 63744: 0xDBE4, + 63845 - 63744: 0xDCA5, + 63846 - 63744: 0xDDA5, + 63847 - 63744: 0xDDD5, + 63848 - 63744: 0xDDF4, + 63849 - 63744: 0xDEFC, + 63850 - 63744: 0xDEFE, + 63851 - 63744: 0xDFB3, + 63852 - 63744: 0xDFE1, + 63853 - 63744: 0xDFE8, + 63854 - 63744: 0xE0F1, + 63855 - 63744: 0xE1AD, + 63856 - 63744: 0xE1ED, + 63857 - 63744: 0xE3F5, + 63858 - 63744: 0xE4A1, + 63859 - 63744: 0xE4A9, + 63860 - 63744: 0xE5AE, + 63861 - 63744: 0xE5B1, + 63862 - 63744: 0xE5B2, + 63863 - 63744: 0xE5B9, + 63864 - 63744: 0xE5BB, + 63865 - 63744: 0xE5BC, + 63866 - 63744: 0xE5C4, + 63867 - 63744: 0xE5CE, + 63868 - 63744: 0xE5D0, + 63869 - 63744: 0xE5D2, + 63870 - 63744: 0xE5D6, + 63871 - 63744: 0xE5FA, + 63872 - 63744: 0xE5FB, + 63873 - 63744: 0xE5FC, + 63874 - 63744: 0xE5FE, + 63875 - 63744: 0xE6A1, + 63876 - 63744: 0xE6A4, + 63877 - 63744: 0xE6A7, + 63878 - 63744: 0xE6AD, + 63879 - 63744: 0xE6AF, + 63880 - 63744: 0xE6B0, + 63881 - 63744: 0xE6B1, + 63882 - 63744: 0xE6B3, + 63883 - 63744: 0xE6B7, + 63884 - 63744: 0xE6B8, + 63885 - 63744: 0xE6BC, + 63886 - 63744: 0xE6C4, + 63887 - 63744: 0xE6C6, + 63888 - 63744: 0xE6C7, + 63889 - 63744: 0xE6CA, + 63890 - 63744: 0xE6D2, + 63891 - 63744: 0xE6D6, + 63892 - 63744: 0xE6D9, + 63893 - 63744: 0xE6DC, + 63894 - 63744: 0xE6DF, + 63895 - 63744: 0xE6E1, + 63896 - 63744: 0xE6E4, + 63897 - 63744: 0xE6E5, + 63898 - 63744: 0xE6E6, + 63899 - 63744: 0xE6E8, + 63900 - 63744: 0xE6EA, + 63901 - 63744: 0xE6EB, + 63902 - 63744: 0xE6EC, + 63903 - 63744: 0xE6EF, + 63904 - 63744: 0xE6F1, + 63905 - 63744: 0xE6F2, + 63906 - 63744: 0xE6F5, + 63907 - 63744: 0xE6F6, + 63908 - 63744: 0xE6F7, + 63909 - 63744: 0xE6F9, + 63910 - 63744: 0xE7A1, + 63911 - 63744: 0xE7A6, + 63912 - 63744: 0xE7A9, + 63913 - 63744: 0xE7AA, + 63914 - 63744: 0xE7AC, + 63915 - 63744: 0xE7AD, + 63916 - 63744: 0xE7B0, + 63917 - 63744: 0xE7BF, + 63918 - 63744: 0xE7C1, + 63919 - 63744: 0xE7C6, + 63920 - 63744: 0xE7C7, + 63921 - 63744: 0xE7CB, + 63922 - 63744: 0xE7CD, + 63923 - 63744: 0xE7CF, + 63924 - 63744: 0xE7D0, + 63925 - 63744: 0xE7D3, + 63926 - 63744: 0xE7DF, + 63927 - 63744: 0xE7E4, + 63928 - 63744: 0xE7E6, + 63929 - 63744: 0xE7F7, + 63930 - 63744: 0xE8E7, + 63931 - 63744: 0xE8E8, + 63932 - 63744: 0xE8F0, + 63933 - 63744: 0xE8F1, + 63934 - 63744: 0xE8F7, + 63935 - 63744: 0xE8F9, + 63936 - 63744: 0xE8FB, + 63937 - 63744: 0xE8FE, + 63938 - 63744: 0xE9A7, + 63939 - 63744: 0xE9AC, + 63940 - 63744: 0xE9CC, + 63941 - 63744: 0xE9F7, + 63942 - 63744: 0xEAC1, + 63943 - 63744: 0xEAE5, + 63944 - 63744: 0xEAF4, + 63945 - 63744: 0xEAF7, + 63946 - 63744: 0xEAFC, + 63947 - 63744: 0xEAFE, + 63948 - 63744: 0xEBA4, + 63949 - 63744: 0xEBA7, + 63950 - 63744: 0xEBA9, + 63951 - 63744: 0xEBAA, + 63952 - 63744: 0xEBBA, + 63953 - 63744: 0xEBBB, + 63954 - 63744: 0xEBBD, + 63955 - 63744: 0xEBC1, + 63956 - 63744: 0xEBC2, + 63957 - 63744: 0xEBC6, + 63958 - 63744: 0xEBC7, + 63959 - 63744: 0xEBCC, + 63960 - 63744: 0xEBCF, + 63961 - 63744: 0xEBD0, + 63962 - 63744: 0xEBD1, + 63963 - 63744: 0xEBD2, + 63964 - 63744: 0xEBD8, + 63965 - 63744: 0xECA6, + 63966 - 63744: 0xECA7, + 63967 - 63744: 0xECAA, + 63968 - 63744: 0xECAF, + 63969 - 63744: 0xECB0, + 63970 - 63744: 0xECB1, + 63971 - 63744: 0xECB2, + 63972 - 63744: 0xECB5, + 63973 - 63744: 0xECB8, + 63974 - 63744: 0xECBA, + 63975 - 63744: 0xECC0, + 63976 - 63744: 0xECC1, + 63977 - 63744: 0xECC5, + 63978 - 63744: 0xECC6, + 63979 - 63744: 0xECC9, + 63980 - 63744: 0xECCA, + 63981 - 63744: 0xECD5, + 63982 - 63744: 0xECDD, + 63983 - 63744: 0xECDE, + 63984 - 63744: 0xECE1, + 63985 - 63744: 0xECE4, + 63986 - 63744: 0xECE7, + 63987 - 63744: 0xECE8, + 63988 - 63744: 0xECF7, + 63989 - 63744: 0xECF8, + 63990 - 63744: 0xECFA, + 63991 - 63744: 0xEDA1, + 63992 - 63744: 0xEDA2, + 63993 - 63744: 0xEDA3, + 63994 - 63744: 0xEDEE, + 63995 - 63744: 0xEEDB, + 63996 - 63744: 0xF2BD, + 63997 - 63744: 0xF2FA, + 63998 - 63744: 0xF3B1, + 63999 - 63744: 0xF4A7, + 64000 - 63744: 0xF4EE, + 64001 - 63744: 0xF6F4, + 64002 - 63744: 0xF6F6, + 64003 - 63744: 0xF7B8, + 64004 - 63744: 0xF7C8, + 64005 - 63744: 0xF7D3, + 64006 - 63744: 0xF8DB, + 64007 - 63744: 0xF8F0, + 64008 - 63744: 0xFAA1, + 64009 - 63744: 0xFAA2, + 64010 - 63744: 0xFAE6, + 64011 - 63744: 0xFCA9, +} + +const encode6Low, encode6High = 65281, 65511 + +var encode6 = [...]uint16{ + 65281 - 65281: 0xA3A1, + 65282 - 65281: 0xA3A2, + 65283 - 65281: 0xA3A3, + 65284 - 65281: 0xA3A4, + 65285 - 65281: 0xA3A5, + 65286 - 65281: 0xA3A6, + 65287 - 65281: 0xA3A7, + 65288 - 65281: 0xA3A8, + 65289 - 65281: 0xA3A9, + 65290 - 65281: 0xA3AA, + 65291 - 65281: 0xA3AB, + 65292 - 65281: 0xA3AC, + 65293 - 65281: 0xA3AD, + 65294 - 65281: 0xA3AE, + 65295 - 65281: 0xA3AF, + 65296 - 65281: 0xA3B0, + 65297 - 65281: 0xA3B1, + 65298 - 65281: 0xA3B2, + 65299 - 65281: 0xA3B3, + 65300 - 65281: 0xA3B4, + 65301 - 65281: 0xA3B5, + 65302 - 65281: 0xA3B6, + 65303 - 65281: 0xA3B7, + 65304 - 65281: 0xA3B8, + 65305 - 65281: 0xA3B9, + 65306 - 65281: 0xA3BA, + 65307 - 65281: 0xA3BB, + 65308 - 65281: 0xA3BC, + 65309 - 65281: 0xA3BD, + 65310 - 65281: 0xA3BE, + 65311 - 65281: 0xA3BF, + 65312 - 65281: 0xA3C0, + 65313 - 65281: 0xA3C1, + 65314 - 65281: 0xA3C2, + 65315 - 65281: 0xA3C3, + 65316 - 65281: 0xA3C4, + 65317 - 65281: 0xA3C5, + 65318 - 65281: 0xA3C6, + 65319 - 65281: 0xA3C7, + 65320 - 65281: 0xA3C8, + 65321 - 65281: 0xA3C9, + 65322 - 65281: 0xA3CA, + 65323 - 65281: 0xA3CB, + 65324 - 65281: 0xA3CC, + 65325 - 65281: 0xA3CD, + 65326 - 65281: 0xA3CE, + 65327 - 65281: 0xA3CF, + 65328 - 65281: 0xA3D0, + 65329 - 65281: 0xA3D1, + 65330 - 65281: 0xA3D2, + 65331 - 65281: 0xA3D3, + 65332 - 65281: 0xA3D4, + 65333 - 65281: 0xA3D5, + 65334 - 65281: 0xA3D6, + 65335 - 65281: 0xA3D7, + 65336 - 65281: 0xA3D8, + 65337 - 65281: 0xA3D9, + 65338 - 65281: 0xA3DA, + 65339 - 65281: 0xA3DB, + 65340 - 65281: 0xA1AC, + 65341 - 65281: 0xA3DD, + 65342 - 65281: 0xA3DE, + 65343 - 65281: 0xA3DF, + 65344 - 65281: 0xA3E0, + 65345 - 65281: 0xA3E1, + 65346 - 65281: 0xA3E2, + 65347 - 65281: 0xA3E3, + 65348 - 65281: 0xA3E4, + 65349 - 65281: 0xA3E5, + 65350 - 65281: 0xA3E6, + 65351 - 65281: 0xA3E7, + 65352 - 65281: 0xA3E8, + 65353 - 65281: 0xA3E9, + 65354 - 65281: 0xA3EA, + 65355 - 65281: 0xA3EB, + 65356 - 65281: 0xA3EC, + 65357 - 65281: 0xA3ED, + 65358 - 65281: 0xA3EE, + 65359 - 65281: 0xA3EF, + 65360 - 65281: 0xA3F0, + 65361 - 65281: 0xA3F1, + 65362 - 65281: 0xA3F2, + 65363 - 65281: 0xA3F3, + 65364 - 65281: 0xA3F4, + 65365 - 65281: 0xA3F5, + 65366 - 65281: 0xA3F6, + 65367 - 65281: 0xA3F7, + 65368 - 65281: 0xA3F8, + 65369 - 65281: 0xA3F9, + 65370 - 65281: 0xA3FA, + 65371 - 65281: 0xA3FB, + 65372 - 65281: 0xA3FC, + 65373 - 65281: 0xA3FD, + 65374 - 65281: 0xA2A6, + 65504 - 65281: 0xA1CB, + 65505 - 65281: 0xA1CC, + 65506 - 65281: 0xA1FE, + 65507 - 65281: 0xA3FE, + 65509 - 65281: 0xA1CD, + 65510 - 65281: 0xA3DC, +} diff --git a/backend/vendor/golang.org/x/text/encoding/simplifiedchinese/all.go b/backend/vendor/golang.org/x/text/encoding/simplifiedchinese/all.go new file mode 100644 index 0000000..5ecc526 --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/simplifiedchinese/all.go @@ -0,0 +1,12 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package simplifiedchinese + +import ( + "golang.org/x/text/encoding" +) + +// All is a list of all defined encodings in this package. +var All = []encoding.Encoding{GB18030, GBK, HZGB2312} diff --git a/backend/vendor/golang.org/x/text/encoding/simplifiedchinese/gbk.go b/backend/vendor/golang.org/x/text/encoding/simplifiedchinese/gbk.go new file mode 100644 index 0000000..0e0fabf --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/simplifiedchinese/gbk.go @@ -0,0 +1,273 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package simplifiedchinese + +import ( + "unicode/utf8" + + "golang.org/x/text/encoding" + "golang.org/x/text/encoding/internal" + "golang.org/x/text/encoding/internal/identifier" + "golang.org/x/text/transform" +) + +var ( + // GB18030 is the GB18030 encoding. + GB18030 encoding.Encoding = &gbk18030 + // GBK is the GBK encoding. It encodes an extension of the GB2312 character set + // and is also known as Code Page 936. + GBK encoding.Encoding = &gbk +) + +var gbk = internal.Encoding{ + &internal.SimpleEncoding{ + gbkDecoder{gb18030: false}, + gbkEncoder{gb18030: false}, + }, + "GBK", + identifier.GBK, +} + +var gbk18030 = internal.Encoding{ + &internal.SimpleEncoding{ + gbkDecoder{gb18030: true}, + gbkEncoder{gb18030: true}, + }, + "GB18030", + identifier.GB18030, +} + +type gbkDecoder struct { + transform.NopResetter + gb18030 bool +} + +func (d gbkDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 +loop: + for ; nSrc < len(src); nSrc += size { + switch c0 := src[nSrc]; { + case c0 < utf8.RuneSelf: + r, size = rune(c0), 1 + + // Microsoft's Code Page 936 extends GBK 1.0 to encode the euro sign U+20AC + // as 0x80. The HTML5 specification at http://encoding.spec.whatwg.org/#gbk + // says to treat "gbk" as Code Page 936. + // GBK’s decoder is gb18030’s decoder. https://encoding.spec.whatwg.org/#gbk-decoder + // If byte is 0x80, return code point U+20AC. https://encoding.spec.whatwg.org/#gb18030-decoder + case c0 == 0x80: + r, size = '€', 1 + + case c0 < 0xff: + if nSrc+1 >= len(src) { + if !atEOF { + err = transform.ErrShortSrc + break loop + } + r, size = utf8.RuneError, 1 + goto write + } + c1 := src[nSrc+1] + switch { + case 0x40 <= c1 && c1 < 0x7f: + c1 -= 0x40 + case 0x80 <= c1 && c1 < 0xff: + c1 -= 0x41 + case d.gb18030 && 0x30 <= c1 && c1 < 0x40: + if nSrc+3 >= len(src) { + if !atEOF { + err = transform.ErrShortSrc + break loop + } + // The second byte here is always ASCII, so we can set size + // to 1 in all cases. + r, size = utf8.RuneError, 1 + goto write + } + c2 := src[nSrc+2] + if c2 < 0x81 || 0xff <= c2 { + r, size = utf8.RuneError, 1 + goto write + } + c3 := src[nSrc+3] + if c3 < 0x30 || 0x3a <= c3 { + r, size = utf8.RuneError, 1 + goto write + } + size = 4 + r = ((rune(c0-0x81)*10+rune(c1-0x30))*126+rune(c2-0x81))*10 + rune(c3-0x30) + if r < 39420 { + i, j := 0, len(gb18030) + for i < j { + h := i + (j-i)/2 + if r >= rune(gb18030[h][0]) { + i = h + 1 + } else { + j = h + } + } + dec := &gb18030[i-1] + r += rune(dec[1]) - rune(dec[0]) + goto write + } + r -= 189000 + if 0 <= r && r < 0x100000 { + r += 0x10000 + } else { + r, size = utf8.RuneError, 1 + } + goto write + default: + r, size = utf8.RuneError, 1 + goto write + } + r, size = '\ufffd', 2 + if i := int(c0-0x81)*190 + int(c1); i < len(decode) { + r = rune(decode[i]) + if r == 0 { + r = '\ufffd' + } + } + + default: + r, size = utf8.RuneError, 1 + } + + write: + if nDst+utf8.RuneLen(r) > len(dst) { + err = transform.ErrShortDst + break loop + } + nDst += utf8.EncodeRune(dst[nDst:], r) + } + return nDst, nSrc, err +} + +type gbkEncoder struct { + transform.NopResetter + gb18030 bool +} + +func (e gbkEncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, r2, size := rune(0), rune(0), 0 + for ; nSrc < len(src); nSrc += size { + r = rune(src[nSrc]) + + // Decode a 1-byte rune. + if r < utf8.RuneSelf { + size = 1 + + } else { + // Decode a multi-byte rune. + r, size = utf8.DecodeRune(src[nSrc:]) + if size == 1 { + // All valid runes of size 1 (those below utf8.RuneSelf) were + // handled above. We have invalid UTF-8 or we haven't seen the + // full character yet. + if !atEOF && !utf8.FullRune(src[nSrc:]) { + err = transform.ErrShortSrc + break + } + } + + // func init checks that the switch covers all tables. + switch { + case encode0Low <= r && r < encode0High: + if r2 = rune(encode0[r-encode0Low]); r2 != 0 { + goto write2 + } + case encode1Low <= r && r < encode1High: + // Microsoft's Code Page 936 extends GBK 1.0 to encode the euro sign U+20AC + // as 0x80. The HTML5 specification at http://encoding.spec.whatwg.org/#gbk + // says to treat "gbk" as Code Page 936. + // GBK’s encoder is gb18030’s encoder with its _is GBK_ set to true. https://encoding.spec.whatwg.org/#gbk-encoder + // If _is GBK_ is true and code point is U+20AC, return byte 0x80. https://encoding.spec.whatwg.org/#gb18030-encoder + if !e.gb18030 && r == '€' { + r = 0x80 + goto write1 + } + if r2 = rune(encode1[r-encode1Low]); r2 != 0 { + goto write2 + } + case encode2Low <= r && r < encode2High: + if r2 = rune(encode2[r-encode2Low]); r2 != 0 { + goto write2 + } + case encode3Low <= r && r < encode3High: + if r2 = rune(encode3[r-encode3Low]); r2 != 0 { + goto write2 + } + case encode4Low <= r && r < encode4High: + if r2 = rune(encode4[r-encode4Low]); r2 != 0 { + goto write2 + } + } + + if e.gb18030 { + if r < 0x10000 { + i, j := 0, len(gb18030) + for i < j { + h := i + (j-i)/2 + if r >= rune(gb18030[h][1]) { + i = h + 1 + } else { + j = h + } + } + dec := &gb18030[i-1] + r += rune(dec[0]) - rune(dec[1]) + goto write4 + } else if r < 0x110000 { + r += 189000 - 0x10000 + goto write4 + } + } + err = internal.ErrASCIIReplacement + break + } + + write1: + if nDst >= len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst] = uint8(r) + nDst++ + continue + + write2: + if nDst+2 > len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst+0] = uint8(r2 >> 8) + dst[nDst+1] = uint8(r2) + nDst += 2 + continue + + write4: + if nDst+4 > len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst+3] = uint8(r%10 + 0x30) + r /= 10 + dst[nDst+2] = uint8(r%126 + 0x81) + r /= 126 + dst[nDst+1] = uint8(r%10 + 0x30) + r /= 10 + dst[nDst+0] = uint8(r + 0x81) + nDst += 4 + continue + } + return nDst, nSrc, err +} + +func init() { + // Check that the hard-coded encode switch covers all tables. + if numEncodeTables != 5 { + panic("bad numEncodeTables") + } +} diff --git a/backend/vendor/golang.org/x/text/encoding/simplifiedchinese/hzgb2312.go b/backend/vendor/golang.org/x/text/encoding/simplifiedchinese/hzgb2312.go new file mode 100644 index 0000000..e15b7bf --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/simplifiedchinese/hzgb2312.go @@ -0,0 +1,245 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package simplifiedchinese + +import ( + "unicode/utf8" + + "golang.org/x/text/encoding" + "golang.org/x/text/encoding/internal" + "golang.org/x/text/encoding/internal/identifier" + "golang.org/x/text/transform" +) + +// HZGB2312 is the HZ-GB2312 encoding. +var HZGB2312 encoding.Encoding = &hzGB2312 + +var hzGB2312 = internal.Encoding{ + internal.FuncEncoding{hzGB2312NewDecoder, hzGB2312NewEncoder}, + "HZ-GB2312", + identifier.HZGB2312, +} + +func hzGB2312NewDecoder() transform.Transformer { + return new(hzGB2312Decoder) +} + +func hzGB2312NewEncoder() transform.Transformer { + return new(hzGB2312Encoder) +} + +const ( + asciiState = iota + gbState +) + +type hzGB2312Decoder int + +func (d *hzGB2312Decoder) Reset() { + *d = asciiState +} + +func (d *hzGB2312Decoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 +loop: + for ; nSrc < len(src); nSrc += size { + c0 := src[nSrc] + if c0 >= utf8.RuneSelf { + r, size = utf8.RuneError, 1 + goto write + } + + if c0 == '~' { + if nSrc+1 >= len(src) { + if !atEOF { + err = transform.ErrShortSrc + break loop + } + r, size = utf8.RuneError, 1 + goto write + } + size = 2 + switch src[nSrc+1] { + case '{': + *d = gbState + continue + case '}': + *d = asciiState + continue + case '~': + if nDst >= len(dst) { + err = transform.ErrShortDst + break loop + } + dst[nDst] = '~' + nDst++ + continue + case '\n': + continue + default: + r = utf8.RuneError + goto write + } + } + + if *d == asciiState { + r, size = rune(c0), 1 + } else { + if nSrc+1 >= len(src) { + if !atEOF { + err = transform.ErrShortSrc + break loop + } + r, size = utf8.RuneError, 1 + goto write + } + size = 2 + c1 := src[nSrc+1] + if c0 < 0x21 || 0x7e <= c0 || c1 < 0x21 || 0x7f <= c1 { + // error + } else if i := int(c0-0x01)*190 + int(c1+0x3f); i < len(decode) { + r = rune(decode[i]) + if r != 0 { + goto write + } + } + if c1 > utf8.RuneSelf { + // Be consistent and always treat non-ASCII as a single error. + size = 1 + } + r = utf8.RuneError + } + + write: + if nDst+utf8.RuneLen(r) > len(dst) { + err = transform.ErrShortDst + break loop + } + nDst += utf8.EncodeRune(dst[nDst:], r) + } + return nDst, nSrc, err +} + +type hzGB2312Encoder int + +func (d *hzGB2312Encoder) Reset() { + *d = asciiState +} + +func (e *hzGB2312Encoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 + for ; nSrc < len(src); nSrc += size { + r = rune(src[nSrc]) + + // Decode a 1-byte rune. + if r < utf8.RuneSelf { + size = 1 + if r == '~' { + if nDst+2 > len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst+0] = '~' + dst[nDst+1] = '~' + nDst += 2 + continue + } else if *e != asciiState { + if nDst+3 > len(dst) { + err = transform.ErrShortDst + break + } + *e = asciiState + dst[nDst+0] = '~' + dst[nDst+1] = '}' + nDst += 2 + } else if nDst >= len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst] = uint8(r) + nDst += 1 + continue + + } + + // Decode a multi-byte rune. + r, size = utf8.DecodeRune(src[nSrc:]) + if size == 1 { + // All valid runes of size 1 (those below utf8.RuneSelf) were + // handled above. We have invalid UTF-8 or we haven't seen the + // full character yet. + if !atEOF && !utf8.FullRune(src[nSrc:]) { + err = transform.ErrShortSrc + break + } + } + + // func init checks that the switch covers all tables. + switch { + case encode0Low <= r && r < encode0High: + if r = rune(encode0[r-encode0Low]); r != 0 { + goto writeGB + } + case encode1Low <= r && r < encode1High: + if r = rune(encode1[r-encode1Low]); r != 0 { + goto writeGB + } + case encode2Low <= r && r < encode2High: + if r = rune(encode2[r-encode2Low]); r != 0 { + goto writeGB + } + case encode3Low <= r && r < encode3High: + if r = rune(encode3[r-encode3Low]); r != 0 { + goto writeGB + } + case encode4Low <= r && r < encode4High: + if r = rune(encode4[r-encode4Low]); r != 0 { + goto writeGB + } + } + + terminateInASCIIState: + // Switch back to ASCII state in case of error so that an ASCII + // replacement character can be written in the correct state. + if *e != asciiState { + if nDst+2 > len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst+0] = '~' + dst[nDst+1] = '}' + nDst += 2 + } + err = internal.ErrASCIIReplacement + break + + writeGB: + c0 := uint8(r>>8) - 0x80 + c1 := uint8(r) - 0x80 + if c0 < 0x21 || 0x7e <= c0 || c1 < 0x21 || 0x7f <= c1 { + goto terminateInASCIIState + } + if *e == asciiState { + if nDst+4 > len(dst) { + err = transform.ErrShortDst + break + } + *e = gbState + dst[nDst+0] = '~' + dst[nDst+1] = '{' + nDst += 2 + } else if nDst+2 > len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst+0] = c0 + dst[nDst+1] = c1 + nDst += 2 + continue + } + // TODO: should one always terminate in ASCII state to make it safe to + // concatenate two HZ-GB2312-encoded strings? + return nDst, nSrc, err +} diff --git a/backend/vendor/golang.org/x/text/encoding/simplifiedchinese/tables.go b/backend/vendor/golang.org/x/text/encoding/simplifiedchinese/tables.go new file mode 100644 index 0000000..415f52a --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/simplifiedchinese/tables.go @@ -0,0 +1,43999 @@ +// generated by go run maketables.go; DO NOT EDIT + +// Package simplifiedchinese provides Simplified Chinese encodings such as GBK. +package simplifiedchinese // import "golang.org/x/text/encoding/simplifiedchinese" + +// gb18030 is the table from http://encoding.spec.whatwg.org/index-gb18030.txt +var gb18030 = [...][2]uint16{ + {0x0000, 0x0080}, + {0x0024, 0x00a5}, + {0x0026, 0x00a9}, + {0x002d, 0x00b2}, + {0x0032, 0x00b8}, + {0x0051, 0x00d8}, + {0x0059, 0x00e2}, + {0x005f, 0x00eb}, + {0x0060, 0x00ee}, + {0x0064, 0x00f4}, + {0x0067, 0x00f8}, + {0x0068, 0x00fb}, + {0x0069, 0x00fd}, + {0x006d, 0x0102}, + {0x007e, 0x0114}, + {0x0085, 0x011c}, + {0x0094, 0x012c}, + {0x00ac, 0x0145}, + {0x00af, 0x0149}, + {0x00b3, 0x014e}, + {0x00d0, 0x016c}, + {0x0132, 0x01cf}, + {0x0133, 0x01d1}, + {0x0134, 0x01d3}, + {0x0135, 0x01d5}, + {0x0136, 0x01d7}, + {0x0137, 0x01d9}, + {0x0138, 0x01db}, + {0x0139, 0x01dd}, + {0x0155, 0x01fa}, + {0x01ac, 0x0252}, + {0x01bb, 0x0262}, + {0x0220, 0x02c8}, + {0x0221, 0x02cc}, + {0x022e, 0x02da}, + {0x02e5, 0x03a2}, + {0x02e6, 0x03aa}, + {0x02ed, 0x03c2}, + {0x02ee, 0x03ca}, + {0x0325, 0x0402}, + {0x0333, 0x0450}, + {0x0334, 0x0452}, + {0x1ef2, 0x2011}, + {0x1ef4, 0x2017}, + {0x1ef5, 0x201a}, + {0x1ef7, 0x201e}, + {0x1efe, 0x2027}, + {0x1f07, 0x2031}, + {0x1f08, 0x2034}, + {0x1f09, 0x2036}, + {0x1f0e, 0x203c}, + {0x1f7e, 0x20ad}, + {0x1fd4, 0x2104}, + {0x1fd5, 0x2106}, + {0x1fd8, 0x210a}, + {0x1fe4, 0x2117}, + {0x1fee, 0x2122}, + {0x202c, 0x216c}, + {0x2030, 0x217a}, + {0x2046, 0x2194}, + {0x2048, 0x219a}, + {0x20b6, 0x2209}, + {0x20bc, 0x2210}, + {0x20bd, 0x2212}, + {0x20c0, 0x2216}, + {0x20c4, 0x221b}, + {0x20c6, 0x2221}, + {0x20c8, 0x2224}, + {0x20c9, 0x2226}, + {0x20ca, 0x222c}, + {0x20cc, 0x222f}, + {0x20d1, 0x2238}, + {0x20d6, 0x223e}, + {0x20e0, 0x2249}, + {0x20e3, 0x224d}, + {0x20e8, 0x2253}, + {0x20f5, 0x2262}, + {0x20f7, 0x2268}, + {0x20fd, 0x2270}, + {0x2122, 0x2296}, + {0x2125, 0x229a}, + {0x2130, 0x22a6}, + {0x2149, 0x22c0}, + {0x219b, 0x2313}, + {0x22e8, 0x246a}, + {0x22f2, 0x249c}, + {0x2356, 0x254c}, + {0x235a, 0x2574}, + {0x2367, 0x2590}, + {0x236a, 0x2596}, + {0x2374, 0x25a2}, + {0x2384, 0x25b4}, + {0x238c, 0x25be}, + {0x2394, 0x25c8}, + {0x2397, 0x25cc}, + {0x2399, 0x25d0}, + {0x23ab, 0x25e6}, + {0x23ca, 0x2607}, + {0x23cc, 0x260a}, + {0x2402, 0x2641}, + {0x2403, 0x2643}, + {0x2c41, 0x2e82}, + {0x2c43, 0x2e85}, + {0x2c46, 0x2e89}, + {0x2c48, 0x2e8d}, + {0x2c52, 0x2e98}, + {0x2c61, 0x2ea8}, + {0x2c63, 0x2eab}, + {0x2c66, 0x2eaf}, + {0x2c6a, 0x2eb4}, + {0x2c6c, 0x2eb8}, + {0x2c6f, 0x2ebc}, + {0x2c7d, 0x2ecb}, + {0x2da2, 0x2ffc}, + {0x2da6, 0x3004}, + {0x2da7, 0x3018}, + {0x2dac, 0x301f}, + {0x2dae, 0x302a}, + {0x2dc2, 0x303f}, + {0x2dc4, 0x3094}, + {0x2dcb, 0x309f}, + {0x2dcd, 0x30f7}, + {0x2dd2, 0x30ff}, + {0x2dd8, 0x312a}, + {0x2ece, 0x322a}, + {0x2ed5, 0x3232}, + {0x2f46, 0x32a4}, + {0x3030, 0x3390}, + {0x303c, 0x339f}, + {0x303e, 0x33a2}, + {0x3060, 0x33c5}, + {0x3069, 0x33cf}, + {0x306b, 0x33d3}, + {0x306d, 0x33d6}, + {0x30de, 0x3448}, + {0x3109, 0x3474}, + {0x3233, 0x359f}, + {0x32a2, 0x360f}, + {0x32ad, 0x361b}, + {0x35aa, 0x3919}, + {0x35ff, 0x396f}, + {0x365f, 0x39d1}, + {0x366d, 0x39e0}, + {0x3700, 0x3a74}, + {0x37da, 0x3b4f}, + {0x38f9, 0x3c6f}, + {0x396a, 0x3ce1}, + {0x3cdf, 0x4057}, + {0x3de7, 0x4160}, + {0x3fbe, 0x4338}, + {0x4032, 0x43ad}, + {0x4036, 0x43b2}, + {0x4061, 0x43de}, + {0x4159, 0x44d7}, + {0x42ce, 0x464d}, + {0x42e2, 0x4662}, + {0x43a3, 0x4724}, + {0x43a8, 0x472a}, + {0x43fa, 0x477d}, + {0x440a, 0x478e}, + {0x45c3, 0x4948}, + {0x45f5, 0x497b}, + {0x45f7, 0x497e}, + {0x45fb, 0x4984}, + {0x45fc, 0x4987}, + {0x4610, 0x499c}, + {0x4613, 0x49a0}, + {0x4629, 0x49b8}, + {0x48e8, 0x4c78}, + {0x490f, 0x4ca4}, + {0x497e, 0x4d1a}, + {0x4a12, 0x4daf}, + {0x4a63, 0x9fa6}, + {0x82bd, 0xe76c}, + {0x82be, 0xe7c8}, + {0x82bf, 0xe7e7}, + {0x82cc, 0xe815}, + {0x82cd, 0xe819}, + {0x82d2, 0xe81f}, + {0x82d9, 0xe827}, + {0x82dd, 0xe82d}, + {0x82e1, 0xe833}, + {0x82e9, 0xe83c}, + {0x82f0, 0xe844}, + {0x8300, 0xe856}, + {0x830e, 0xe865}, + {0x93d5, 0xf92d}, + {0x9421, 0xf97a}, + {0x943c, 0xf996}, + {0x948d, 0xf9e8}, + {0x9496, 0xf9f2}, + {0x94b0, 0xfa10}, + {0x94b1, 0xfa12}, + {0x94b2, 0xfa15}, + {0x94b5, 0xfa19}, + {0x94bb, 0xfa22}, + {0x94bc, 0xfa25}, + {0x94be, 0xfa2a}, + {0x98c4, 0xfe32}, + {0x98c5, 0xfe45}, + {0x98c9, 0xfe53}, + {0x98ca, 0xfe58}, + {0x98cb, 0xfe67}, + {0x98cc, 0xfe6c}, + {0x9961, 0xff5f}, + {0x99e2, 0xffe6}, +} + +// decode is the decoding table from GBK code to Unicode. +// It is defined at http://encoding.spec.whatwg.org/index-gbk.txt +var decode = [...]uint16{ + 0: 0x4E02, + 1: 0x4E04, + 2: 0x4E05, + 3: 0x4E06, + 4: 0x4E0F, + 5: 0x4E12, + 6: 0x4E17, + 7: 0x4E1F, + 8: 0x4E20, + 9: 0x4E21, + 10: 0x4E23, + 11: 0x4E26, + 12: 0x4E29, + 13: 0x4E2E, + 14: 0x4E2F, + 15: 0x4E31, + 16: 0x4E33, + 17: 0x4E35, + 18: 0x4E37, + 19: 0x4E3C, + 20: 0x4E40, + 21: 0x4E41, + 22: 0x4E42, + 23: 0x4E44, + 24: 0x4E46, + 25: 0x4E4A, + 26: 0x4E51, + 27: 0x4E55, + 28: 0x4E57, + 29: 0x4E5A, + 30: 0x4E5B, + 31: 0x4E62, + 32: 0x4E63, + 33: 0x4E64, + 34: 0x4E65, + 35: 0x4E67, + 36: 0x4E68, + 37: 0x4E6A, + 38: 0x4E6B, + 39: 0x4E6C, + 40: 0x4E6D, + 41: 0x4E6E, + 42: 0x4E6F, + 43: 0x4E72, + 44: 0x4E74, + 45: 0x4E75, + 46: 0x4E76, + 47: 0x4E77, + 48: 0x4E78, + 49: 0x4E79, + 50: 0x4E7A, + 51: 0x4E7B, + 52: 0x4E7C, + 53: 0x4E7D, + 54: 0x4E7F, + 55: 0x4E80, + 56: 0x4E81, + 57: 0x4E82, + 58: 0x4E83, + 59: 0x4E84, + 60: 0x4E85, + 61: 0x4E87, + 62: 0x4E8A, + 63: 0x4E90, + 64: 0x4E96, + 65: 0x4E97, + 66: 0x4E99, + 67: 0x4E9C, + 68: 0x4E9D, + 69: 0x4E9E, + 70: 0x4EA3, + 71: 0x4EAA, + 72: 0x4EAF, + 73: 0x4EB0, + 74: 0x4EB1, + 75: 0x4EB4, + 76: 0x4EB6, + 77: 0x4EB7, + 78: 0x4EB8, + 79: 0x4EB9, + 80: 0x4EBC, + 81: 0x4EBD, + 82: 0x4EBE, + 83: 0x4EC8, + 84: 0x4ECC, + 85: 0x4ECF, + 86: 0x4ED0, + 87: 0x4ED2, + 88: 0x4EDA, + 89: 0x4EDB, + 90: 0x4EDC, + 91: 0x4EE0, + 92: 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23440: 0x9F11, + 23441: 0x9F12, + 23442: 0x9F14, + 23443: 0x9F15, + 23444: 0x9F16, + 23445: 0x9F18, + 23446: 0x9F1A, + 23447: 0x9F1B, + 23448: 0x9F1C, + 23449: 0x9F1D, + 23450: 0x9F1E, + 23451: 0x9F1F, + 23452: 0x9F21, + 23453: 0x9F23, + 23454: 0x9F24, + 23455: 0x9F25, + 23456: 0x9F26, + 23457: 0x9F27, + 23458: 0x9F28, + 23459: 0x9F29, + 23460: 0x9F2A, + 23461: 0x9F2B, + 23462: 0x9F2D, + 23463: 0x9F2E, + 23464: 0x9F30, + 23465: 0x9F31, + 23560: 0x9F32, + 23561: 0x9F33, + 23562: 0x9F34, + 23563: 0x9F35, + 23564: 0x9F36, + 23565: 0x9F38, + 23566: 0x9F3A, + 23567: 0x9F3C, + 23568: 0x9F3F, + 23569: 0x9F40, + 23570: 0x9F41, + 23571: 0x9F42, + 23572: 0x9F43, + 23573: 0x9F45, + 23574: 0x9F46, + 23575: 0x9F47, + 23576: 0x9F48, + 23577: 0x9F49, + 23578: 0x9F4A, + 23579: 0x9F4B, + 23580: 0x9F4C, + 23581: 0x9F4D, + 23582: 0x9F4E, + 23583: 0x9F4F, + 23584: 0x9F52, + 23585: 0x9F53, + 23586: 0x9F54, + 23587: 0x9F55, + 23588: 0x9F56, + 23589: 0x9F57, + 23590: 0x9F58, + 23591: 0x9F59, + 23592: 0x9F5A, + 23593: 0x9F5B, + 23594: 0x9F5C, + 23595: 0x9F5D, + 23596: 0x9F5E, + 23597: 0x9F5F, + 23598: 0x9F60, + 23599: 0x9F61, + 23600: 0x9F62, + 23601: 0x9F63, + 23602: 0x9F64, + 23603: 0x9F65, + 23604: 0x9F66, + 23605: 0x9F67, + 23606: 0x9F68, + 23607: 0x9F69, + 23608: 0x9F6A, + 23609: 0x9F6B, + 23610: 0x9F6C, + 23611: 0x9F6D, + 23612: 0x9F6E, + 23613: 0x9F6F, + 23614: 0x9F70, + 23615: 0x9F71, + 23616: 0x9F72, + 23617: 0x9F73, + 23618: 0x9F74, + 23619: 0x9F75, + 23620: 0x9F76, + 23621: 0x9F77, + 23622: 0x9F78, + 23623: 0x9F79, + 23624: 0x9F7A, + 23625: 0x9F7B, + 23626: 0x9F7C, + 23627: 0x9F7D, + 23628: 0x9F7E, + 23629: 0x9F81, + 23630: 0x9F82, + 23631: 0x9F8D, + 23632: 0x9F8E, + 23633: 0x9F8F, + 23634: 0x9F90, + 23635: 0x9F91, + 23636: 0x9F92, + 23637: 0x9F93, + 23638: 0x9F94, + 23639: 0x9F95, + 23640: 0x9F96, + 23641: 0x9F97, + 23642: 0x9F98, + 23643: 0x9F9C, + 23644: 0x9F9D, + 23645: 0x9F9E, + 23646: 0x9FA1, + 23647: 0x9FA2, + 23648: 0x9FA3, + 23649: 0x9FA4, + 23650: 0x9FA5, + 23651: 0xF92C, + 23652: 0xF979, + 23653: 0xF995, + 23654: 0xF9E7, + 23655: 0xF9F1, + 23750: 0xFA0C, + 23751: 0xFA0D, + 23752: 0xFA0E, + 23753: 0xFA0F, + 23754: 0xFA11, + 23755: 0xFA13, + 23756: 0xFA14, + 23757: 0xFA18, + 23758: 0xFA1F, + 23759: 0xFA20, + 23760: 0xFA21, + 23761: 0xFA23, + 23762: 0xFA24, + 23763: 0xFA27, + 23764: 0xFA28, + 23765: 0xFA29, + 23766: 0x2E81, + 23770: 0x2E84, + 23771: 0x3473, + 23772: 0x3447, + 23773: 0x2E88, + 23774: 0x2E8B, + 23776: 0x359E, + 23777: 0x361A, + 23778: 0x360E, + 23779: 0x2E8C, + 23780: 0x2E97, + 23781: 0x396E, + 23782: 0x3918, + 23784: 0x39CF, + 23785: 0x39DF, + 23786: 0x3A73, + 23787: 0x39D0, + 23790: 0x3B4E, + 23791: 0x3C6E, + 23792: 0x3CE0, + 23793: 0x2EA7, + 23796: 0x2EAA, + 23797: 0x4056, + 23798: 0x415F, + 23799: 0x2EAE, + 23800: 0x4337, + 23801: 0x2EB3, + 23802: 0x2EB6, + 23803: 0x2EB7, + 23805: 0x43B1, + 23806: 0x43AC, + 23807: 0x2EBB, + 23808: 0x43DD, + 23809: 0x44D6, + 23810: 0x4661, + 23811: 0x464C, + 23813: 0x4723, + 23814: 0x4729, + 23815: 0x477C, + 23816: 0x478D, + 23817: 0x2ECA, + 23818: 0x4947, + 23819: 0x497A, + 23820: 0x497D, + 23821: 0x4982, + 23822: 0x4983, + 23823: 0x4985, + 23824: 0x4986, + 23825: 0x499F, + 23826: 0x499B, + 23827: 0x49B7, + 23828: 0x49B6, + 23831: 0x4CA3, + 23832: 0x4C9F, + 23833: 0x4CA0, + 23834: 0x4CA1, + 23835: 0x4C77, + 23836: 0x4CA2, + 23837: 0x4D13, + 23838: 0x4D14, + 23839: 0x4D15, + 23840: 0x4D16, + 23841: 0x4D17, + 23842: 0x4D18, + 23843: 0x4D19, + 23844: 0x4DAE, +} + +const numEncodeTables = 5 + +// encodeX are the encoding tables from Unicode to GBK code, +// sorted by decreasing length. +// encode0: 28965 entries for runes in [11905, 40870). +// encode1: 1587 entries for runes in [ 8208, 9795). +// encode2: 942 entries for runes in [ 164, 1106). +// encode3: 438 entries for runes in [65072, 65510). +// encode4: 254 entries for runes in [63788, 64042). + +const encode0Low, encode0High = 11905, 40870 + +var encode0 = [...]uint16{ + 11905 - 11905: 0xFE50, + 11908 - 11905: 0xFE54, + 11912 - 11905: 0xFE57, + 11915 - 11905: 0xFE58, + 11916 - 11905: 0xFE5D, + 11927 - 11905: 0xFE5E, + 11943 - 11905: 0xFE6B, + 11946 - 11905: 0xFE6E, + 11950 - 11905: 0xFE71, + 11955 - 11905: 0xFE73, + 11958 - 11905: 0xFE74, + 11959 - 11905: 0xFE75, + 11963 - 11905: 0xFE79, + 11978 - 11905: 0xFE84, + 12272 - 11905: 0xA98A, + 12273 - 11905: 0xA98B, + 12274 - 11905: 0xA98C, + 12275 - 11905: 0xA98D, + 12276 - 11905: 0xA98E, + 12277 - 11905: 0xA98F, + 12278 - 11905: 0xA990, + 12279 - 11905: 0xA991, + 12280 - 11905: 0xA992, + 12281 - 11905: 0xA993, + 12282 - 11905: 0xA994, + 12283 - 11905: 0xA995, + 12288 - 11905: 0xA1A1, + 12289 - 11905: 0xA1A2, + 12290 - 11905: 0xA1A3, + 12291 - 11905: 0xA1A8, + 12293 - 11905: 0xA1A9, + 12294 - 11905: 0xA965, + 12295 - 11905: 0xA996, + 12296 - 11905: 0xA1B4, + 12297 - 11905: 0xA1B5, + 12298 - 11905: 0xA1B6, + 12299 - 11905: 0xA1B7, + 12300 - 11905: 0xA1B8, + 12301 - 11905: 0xA1B9, + 12302 - 11905: 0xA1BA, + 12303 - 11905: 0xA1BB, + 12304 - 11905: 0xA1BE, + 12305 - 11905: 0xA1BF, + 12306 - 11905: 0xA893, + 12307 - 11905: 0xA1FE, + 12308 - 11905: 0xA1B2, + 12309 - 11905: 0xA1B3, + 12310 - 11905: 0xA1BC, + 12311 - 11905: 0xA1BD, + 12317 - 11905: 0xA894, + 12318 - 11905: 0xA895, + 12321 - 11905: 0xA940, + 12322 - 11905: 0xA941, + 12323 - 11905: 0xA942, + 12324 - 11905: 0xA943, + 12325 - 11905: 0xA944, + 12326 - 11905: 0xA945, + 12327 - 11905: 0xA946, + 12328 - 11905: 0xA947, + 12329 - 11905: 0xA948, + 12350 - 11905: 0xA989, + 12353 - 11905: 0xA4A1, + 12354 - 11905: 0xA4A2, + 12355 - 11905: 0xA4A3, + 12356 - 11905: 0xA4A4, + 12357 - 11905: 0xA4A5, + 12358 - 11905: 0xA4A6, + 12359 - 11905: 0xA4A7, + 12360 - 11905: 0xA4A8, + 12361 - 11905: 0xA4A9, + 12362 - 11905: 0xA4AA, + 12363 - 11905: 0xA4AB, + 12364 - 11905: 0xA4AC, + 12365 - 11905: 0xA4AD, + 12366 - 11905: 0xA4AE, + 12367 - 11905: 0xA4AF, + 12368 - 11905: 0xA4B0, + 12369 - 11905: 0xA4B1, + 12370 - 11905: 0xA4B2, + 12371 - 11905: 0xA4B3, + 12372 - 11905: 0xA4B4, + 12373 - 11905: 0xA4B5, + 12374 - 11905: 0xA4B6, + 12375 - 11905: 0xA4B7, + 12376 - 11905: 0xA4B8, + 12377 - 11905: 0xA4B9, + 12378 - 11905: 0xA4BA, + 12379 - 11905: 0xA4BB, + 12380 - 11905: 0xA4BC, + 12381 - 11905: 0xA4BD, + 12382 - 11905: 0xA4BE, + 12383 - 11905: 0xA4BF, + 12384 - 11905: 0xA4C0, + 12385 - 11905: 0xA4C1, + 12386 - 11905: 0xA4C2, + 12387 - 11905: 0xA4C3, + 12388 - 11905: 0xA4C4, + 12389 - 11905: 0xA4C5, + 12390 - 11905: 0xA4C6, + 12391 - 11905: 0xA4C7, + 12392 - 11905: 0xA4C8, + 12393 - 11905: 0xA4C9, + 12394 - 11905: 0xA4CA, + 12395 - 11905: 0xA4CB, + 12396 - 11905: 0xA4CC, + 12397 - 11905: 0xA4CD, + 12398 - 11905: 0xA4CE, + 12399 - 11905: 0xA4CF, + 12400 - 11905: 0xA4D0, + 12401 - 11905: 0xA4D1, + 12402 - 11905: 0xA4D2, + 12403 - 11905: 0xA4D3, + 12404 - 11905: 0xA4D4, + 12405 - 11905: 0xA4D5, + 12406 - 11905: 0xA4D6, + 12407 - 11905: 0xA4D7, + 12408 - 11905: 0xA4D8, + 12409 - 11905: 0xA4D9, + 12410 - 11905: 0xA4DA, + 12411 - 11905: 0xA4DB, + 12412 - 11905: 0xA4DC, + 12413 - 11905: 0xA4DD, + 12414 - 11905: 0xA4DE, + 12415 - 11905: 0xA4DF, + 12416 - 11905: 0xA4E0, + 12417 - 11905: 0xA4E1, + 12418 - 11905: 0xA4E2, + 12419 - 11905: 0xA4E3, + 12420 - 11905: 0xA4E4, + 12421 - 11905: 0xA4E5, + 12422 - 11905: 0xA4E6, + 12423 - 11905: 0xA4E7, + 12424 - 11905: 0xA4E8, + 12425 - 11905: 0xA4E9, + 12426 - 11905: 0xA4EA, + 12427 - 11905: 0xA4EB, + 12428 - 11905: 0xA4EC, + 12429 - 11905: 0xA4ED, + 12430 - 11905: 0xA4EE, + 12431 - 11905: 0xA4EF, + 12432 - 11905: 0xA4F0, + 12433 - 11905: 0xA4F1, + 12434 - 11905: 0xA4F2, + 12435 - 11905: 0xA4F3, + 12443 - 11905: 0xA961, + 12444 - 11905: 0xA962, + 12445 - 11905: 0xA966, + 12446 - 11905: 0xA967, + 12449 - 11905: 0xA5A1, + 12450 - 11905: 0xA5A2, + 12451 - 11905: 0xA5A3, + 12452 - 11905: 0xA5A4, + 12453 - 11905: 0xA5A5, + 12454 - 11905: 0xA5A6, + 12455 - 11905: 0xA5A7, + 12456 - 11905: 0xA5A8, + 12457 - 11905: 0xA5A9, + 12458 - 11905: 0xA5AA, + 12459 - 11905: 0xA5AB, + 12460 - 11905: 0xA5AC, + 12461 - 11905: 0xA5AD, + 12462 - 11905: 0xA5AE, + 12463 - 11905: 0xA5AF, + 12464 - 11905: 0xA5B0, + 12465 - 11905: 0xA5B1, + 12466 - 11905: 0xA5B2, + 12467 - 11905: 0xA5B3, + 12468 - 11905: 0xA5B4, + 12469 - 11905: 0xA5B5, + 12470 - 11905: 0xA5B6, + 12471 - 11905: 0xA5B7, + 12472 - 11905: 0xA5B8, + 12473 - 11905: 0xA5B9, + 12474 - 11905: 0xA5BA, + 12475 - 11905: 0xA5BB, + 12476 - 11905: 0xA5BC, + 12477 - 11905: 0xA5BD, + 12478 - 11905: 0xA5BE, + 12479 - 11905: 0xA5BF, + 12480 - 11905: 0xA5C0, + 12481 - 11905: 0xA5C1, + 12482 - 11905: 0xA5C2, + 12483 - 11905: 0xA5C3, + 12484 - 11905: 0xA5C4, + 12485 - 11905: 0xA5C5, + 12486 - 11905: 0xA5C6, + 12487 - 11905: 0xA5C7, + 12488 - 11905: 0xA5C8, + 12489 - 11905: 0xA5C9, + 12490 - 11905: 0xA5CA, + 12491 - 11905: 0xA5CB, + 12492 - 11905: 0xA5CC, + 12493 - 11905: 0xA5CD, + 12494 - 11905: 0xA5CE, + 12495 - 11905: 0xA5CF, + 12496 - 11905: 0xA5D0, + 12497 - 11905: 0xA5D1, + 12498 - 11905: 0xA5D2, + 12499 - 11905: 0xA5D3, + 12500 - 11905: 0xA5D4, + 12501 - 11905: 0xA5D5, + 12502 - 11905: 0xA5D6, + 12503 - 11905: 0xA5D7, + 12504 - 11905: 0xA5D8, + 12505 - 11905: 0xA5D9, + 12506 - 11905: 0xA5DA, + 12507 - 11905: 0xA5DB, + 12508 - 11905: 0xA5DC, + 12509 - 11905: 0xA5DD, + 12510 - 11905: 0xA5DE, + 12511 - 11905: 0xA5DF, + 12512 - 11905: 0xA5E0, + 12513 - 11905: 0xA5E1, + 12514 - 11905: 0xA5E2, + 12515 - 11905: 0xA5E3, + 12516 - 11905: 0xA5E4, + 12517 - 11905: 0xA5E5, + 12518 - 11905: 0xA5E6, + 12519 - 11905: 0xA5E7, + 12520 - 11905: 0xA5E8, + 12521 - 11905: 0xA5E9, + 12522 - 11905: 0xA5EA, + 12523 - 11905: 0xA5EB, + 12524 - 11905: 0xA5EC, + 12525 - 11905: 0xA5ED, + 12526 - 11905: 0xA5EE, + 12527 - 11905: 0xA5EF, + 12528 - 11905: 0xA5F0, + 12529 - 11905: 0xA5F1, + 12530 - 11905: 0xA5F2, + 12531 - 11905: 0xA5F3, + 12532 - 11905: 0xA5F4, + 12533 - 11905: 0xA5F5, + 12534 - 11905: 0xA5F6, + 12540 - 11905: 0xA960, + 12541 - 11905: 0xA963, + 12542 - 11905: 0xA964, + 12549 - 11905: 0xA8C5, + 12550 - 11905: 0xA8C6, + 12551 - 11905: 0xA8C7, + 12552 - 11905: 0xA8C8, + 12553 - 11905: 0xA8C9, + 12554 - 11905: 0xA8CA, + 12555 - 11905: 0xA8CB, + 12556 - 11905: 0xA8CC, + 12557 - 11905: 0xA8CD, + 12558 - 11905: 0xA8CE, + 12559 - 11905: 0xA8CF, + 12560 - 11905: 0xA8D0, + 12561 - 11905: 0xA8D1, + 12562 - 11905: 0xA8D2, + 12563 - 11905: 0xA8D3, + 12564 - 11905: 0xA8D4, + 12565 - 11905: 0xA8D5, + 12566 - 11905: 0xA8D6, + 12567 - 11905: 0xA8D7, + 12568 - 11905: 0xA8D8, + 12569 - 11905: 0xA8D9, + 12570 - 11905: 0xA8DA, + 12571 - 11905: 0xA8DB, + 12572 - 11905: 0xA8DC, + 12573 - 11905: 0xA8DD, + 12574 - 11905: 0xA8DE, + 12575 - 11905: 0xA8DF, + 12576 - 11905: 0xA8E0, + 12577 - 11905: 0xA8E1, + 12578 - 11905: 0xA8E2, + 12579 - 11905: 0xA8E3, + 12580 - 11905: 0xA8E4, + 12581 - 11905: 0xA8E5, + 12582 - 11905: 0xA8E6, + 12583 - 11905: 0xA8E7, + 12584 - 11905: 0xA8E8, + 12585 - 11905: 0xA8E9, + 12832 - 11905: 0xA2E5, + 12833 - 11905: 0xA2E6, + 12834 - 11905: 0xA2E7, + 12835 - 11905: 0xA2E8, + 12836 - 11905: 0xA2E9, + 12837 - 11905: 0xA2EA, + 12838 - 11905: 0xA2EB, + 12839 - 11905: 0xA2EC, 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+ 40861 - 11905: 0xFD95, + 40862 - 11905: 0xFD96, + 40863 - 11905: 0xB9EA, + 40864 - 11905: 0xD9DF, + 40865 - 11905: 0xFD97, + 40866 - 11905: 0xFD98, + 40867 - 11905: 0xFD99, + 40868 - 11905: 0xFD9A, + 40869 - 11905: 0xFD9B, +} + +const encode1Low, encode1High = 8208, 9795 + +var encode1 = [...]uint16{ + 8208 - 8208: 0xA95C, + 8211 - 8208: 0xA843, + 8212 - 8208: 0xA1AA, + 8213 - 8208: 0xA844, + 8214 - 8208: 0xA1AC, + 8216 - 8208: 0xA1AE, + 8217 - 8208: 0xA1AF, + 8220 - 8208: 0xA1B0, + 8221 - 8208: 0xA1B1, + 8229 - 8208: 0xA845, + 8230 - 8208: 0xA1AD, + 8240 - 8208: 0xA1EB, + 8242 - 8208: 0xA1E4, + 8243 - 8208: 0xA1E5, + 8245 - 8208: 0xA846, + 8251 - 8208: 0xA1F9, + 8364 - 8208: 0xA2E3, + 8451 - 8208: 0xA1E6, + 8453 - 8208: 0xA847, + 8457 - 8208: 0xA848, + 8470 - 8208: 0xA1ED, + 8481 - 8208: 0xA959, + 8544 - 8208: 0xA2F1, + 8545 - 8208: 0xA2F2, + 8546 - 8208: 0xA2F3, + 8547 - 8208: 0xA2F4, + 8548 - 8208: 0xA2F5, + 8549 - 8208: 0xA2F6, + 8550 - 8208: 0xA2F7, + 8551 - 8208: 0xA2F8, + 8552 - 8208: 0xA2F9, + 8553 - 8208: 0xA2FA, + 8554 - 8208: 0xA2FB, + 8555 - 8208: 0xA2FC, + 8560 - 8208: 0xA2A1, + 8561 - 8208: 0xA2A2, + 8562 - 8208: 0xA2A3, + 8563 - 8208: 0xA2A4, + 8564 - 8208: 0xA2A5, + 8565 - 8208: 0xA2A6, + 8566 - 8208: 0xA2A7, + 8567 - 8208: 0xA2A8, + 8568 - 8208: 0xA2A9, + 8569 - 8208: 0xA2AA, + 8592 - 8208: 0xA1FB, + 8593 - 8208: 0xA1FC, + 8594 - 8208: 0xA1FA, + 8595 - 8208: 0xA1FD, + 8598 - 8208: 0xA849, + 8599 - 8208: 0xA84A, + 8600 - 8208: 0xA84B, + 8601 - 8208: 0xA84C, + 8712 - 8208: 0xA1CA, + 8719 - 8208: 0xA1C7, + 8721 - 8208: 0xA1C6, + 8725 - 8208: 0xA84D, + 8730 - 8208: 0xA1CC, + 8733 - 8208: 0xA1D8, + 8734 - 8208: 0xA1DE, + 8735 - 8208: 0xA84E, + 8736 - 8208: 0xA1CF, + 8739 - 8208: 0xA84F, + 8741 - 8208: 0xA1CE, + 8743 - 8208: 0xA1C4, + 8744 - 8208: 0xA1C5, + 8745 - 8208: 0xA1C9, + 8746 - 8208: 0xA1C8, + 8747 - 8208: 0xA1D2, + 8750 - 8208: 0xA1D3, + 8756 - 8208: 0xA1E0, + 8757 - 8208: 0xA1DF, + 8758 - 8208: 0xA1C3, + 8759 - 8208: 0xA1CB, + 8765 - 8208: 0xA1D7, + 8776 - 8208: 0xA1D6, + 8780 - 8208: 0xA1D5, + 8786 - 8208: 0xA850, + 8800 - 8208: 0xA1D9, + 8801 - 8208: 0xA1D4, + 8804 - 8208: 0xA1DC, + 8805 - 8208: 0xA1DD, + 8806 - 8208: 0xA851, + 8807 - 8208: 0xA852, + 8814 - 8208: 0xA1DA, + 8815 - 8208: 0xA1DB, + 8853 - 8208: 0xA892, + 8857 - 8208: 0xA1D1, + 8869 - 8208: 0xA1CD, + 8895 - 8208: 0xA853, + 8978 - 8208: 0xA1D0, + 9312 - 8208: 0xA2D9, + 9313 - 8208: 0xA2DA, + 9314 - 8208: 0xA2DB, + 9315 - 8208: 0xA2DC, + 9316 - 8208: 0xA2DD, + 9317 - 8208: 0xA2DE, + 9318 - 8208: 0xA2DF, + 9319 - 8208: 0xA2E0, + 9320 - 8208: 0xA2E1, + 9321 - 8208: 0xA2E2, + 9332 - 8208: 0xA2C5, + 9333 - 8208: 0xA2C6, + 9334 - 8208: 0xA2C7, + 9335 - 8208: 0xA2C8, + 9336 - 8208: 0xA2C9, + 9337 - 8208: 0xA2CA, + 9338 - 8208: 0xA2CB, + 9339 - 8208: 0xA2CC, + 9340 - 8208: 0xA2CD, + 9341 - 8208: 0xA2CE, + 9342 - 8208: 0xA2CF, + 9343 - 8208: 0xA2D0, + 9344 - 8208: 0xA2D1, + 9345 - 8208: 0xA2D2, + 9346 - 8208: 0xA2D3, + 9347 - 8208: 0xA2D4, + 9348 - 8208: 0xA2D5, + 9349 - 8208: 0xA2D6, + 9350 - 8208: 0xA2D7, + 9351 - 8208: 0xA2D8, + 9352 - 8208: 0xA2B1, + 9353 - 8208: 0xA2B2, + 9354 - 8208: 0xA2B3, + 9355 - 8208: 0xA2B4, + 9356 - 8208: 0xA2B5, + 9357 - 8208: 0xA2B6, + 9358 - 8208: 0xA2B7, + 9359 - 8208: 0xA2B8, + 9360 - 8208: 0xA2B9, + 9361 - 8208: 0xA2BA, + 9362 - 8208: 0xA2BB, + 9363 - 8208: 0xA2BC, + 9364 - 8208: 0xA2BD, + 9365 - 8208: 0xA2BE, + 9366 - 8208: 0xA2BF, + 9367 - 8208: 0xA2C0, + 9368 - 8208: 0xA2C1, + 9369 - 8208: 0xA2C2, + 9370 - 8208: 0xA2C3, + 9371 - 8208: 0xA2C4, + 9472 - 8208: 0xA9A4, + 9473 - 8208: 0xA9A5, + 9474 - 8208: 0xA9A6, + 9475 - 8208: 0xA9A7, + 9476 - 8208: 0xA9A8, + 9477 - 8208: 0xA9A9, + 9478 - 8208: 0xA9AA, + 9479 - 8208: 0xA9AB, + 9480 - 8208: 0xA9AC, + 9481 - 8208: 0xA9AD, + 9482 - 8208: 0xA9AE, + 9483 - 8208: 0xA9AF, + 9484 - 8208: 0xA9B0, + 9485 - 8208: 0xA9B1, + 9486 - 8208: 0xA9B2, + 9487 - 8208: 0xA9B3, + 9488 - 8208: 0xA9B4, + 9489 - 8208: 0xA9B5, + 9490 - 8208: 0xA9B6, + 9491 - 8208: 0xA9B7, + 9492 - 8208: 0xA9B8, + 9493 - 8208: 0xA9B9, + 9494 - 8208: 0xA9BA, + 9495 - 8208: 0xA9BB, + 9496 - 8208: 0xA9BC, + 9497 - 8208: 0xA9BD, + 9498 - 8208: 0xA9BE, + 9499 - 8208: 0xA9BF, + 9500 - 8208: 0xA9C0, + 9501 - 8208: 0xA9C1, + 9502 - 8208: 0xA9C2, + 9503 - 8208: 0xA9C3, + 9504 - 8208: 0xA9C4, + 9505 - 8208: 0xA9C5, + 9506 - 8208: 0xA9C6, + 9507 - 8208: 0xA9C7, + 9508 - 8208: 0xA9C8, + 9509 - 8208: 0xA9C9, + 9510 - 8208: 0xA9CA, + 9511 - 8208: 0xA9CB, + 9512 - 8208: 0xA9CC, + 9513 - 8208: 0xA9CD, + 9514 - 8208: 0xA9CE, + 9515 - 8208: 0xA9CF, + 9516 - 8208: 0xA9D0, + 9517 - 8208: 0xA9D1, + 9518 - 8208: 0xA9D2, + 9519 - 8208: 0xA9D3, + 9520 - 8208: 0xA9D4, + 9521 - 8208: 0xA9D5, + 9522 - 8208: 0xA9D6, + 9523 - 8208: 0xA9D7, + 9524 - 8208: 0xA9D8, + 9525 - 8208: 0xA9D9, + 9526 - 8208: 0xA9DA, + 9527 - 8208: 0xA9DB, + 9528 - 8208: 0xA9DC, + 9529 - 8208: 0xA9DD, + 9530 - 8208: 0xA9DE, + 9531 - 8208: 0xA9DF, + 9532 - 8208: 0xA9E0, + 9533 - 8208: 0xA9E1, + 9534 - 8208: 0xA9E2, + 9535 - 8208: 0xA9E3, + 9536 - 8208: 0xA9E4, + 9537 - 8208: 0xA9E5, + 9538 - 8208: 0xA9E6, + 9539 - 8208: 0xA9E7, + 9540 - 8208: 0xA9E8, + 9541 - 8208: 0xA9E9, + 9542 - 8208: 0xA9EA, + 9543 - 8208: 0xA9EB, + 9544 - 8208: 0xA9EC, + 9545 - 8208: 0xA9ED, + 9546 - 8208: 0xA9EE, + 9547 - 8208: 0xA9EF, + 9552 - 8208: 0xA854, + 9553 - 8208: 0xA855, + 9554 - 8208: 0xA856, + 9555 - 8208: 0xA857, + 9556 - 8208: 0xA858, + 9557 - 8208: 0xA859, + 9558 - 8208: 0xA85A, + 9559 - 8208: 0xA85B, + 9560 - 8208: 0xA85C, + 9561 - 8208: 0xA85D, + 9562 - 8208: 0xA85E, + 9563 - 8208: 0xA85F, + 9564 - 8208: 0xA860, + 9565 - 8208: 0xA861, + 9566 - 8208: 0xA862, + 9567 - 8208: 0xA863, + 9568 - 8208: 0xA864, + 9569 - 8208: 0xA865, + 9570 - 8208: 0xA866, + 9571 - 8208: 0xA867, + 9572 - 8208: 0xA868, + 9573 - 8208: 0xA869, + 9574 - 8208: 0xA86A, + 9575 - 8208: 0xA86B, + 9576 - 8208: 0xA86C, + 9577 - 8208: 0xA86D, + 9578 - 8208: 0xA86E, + 9579 - 8208: 0xA86F, + 9580 - 8208: 0xA870, + 9581 - 8208: 0xA871, + 9582 - 8208: 0xA872, + 9583 - 8208: 0xA873, + 9584 - 8208: 0xA874, + 9585 - 8208: 0xA875, + 9586 - 8208: 0xA876, + 9587 - 8208: 0xA877, + 9601 - 8208: 0xA878, + 9602 - 8208: 0xA879, + 9603 - 8208: 0xA87A, + 9604 - 8208: 0xA87B, + 9605 - 8208: 0xA87C, + 9606 - 8208: 0xA87D, + 9607 - 8208: 0xA87E, + 9608 - 8208: 0xA880, + 9609 - 8208: 0xA881, + 9610 - 8208: 0xA882, + 9611 - 8208: 0xA883, + 9612 - 8208: 0xA884, + 9613 - 8208: 0xA885, + 9614 - 8208: 0xA886, + 9615 - 8208: 0xA887, + 9619 - 8208: 0xA888, + 9620 - 8208: 0xA889, + 9621 - 8208: 0xA88A, + 9632 - 8208: 0xA1F6, + 9633 - 8208: 0xA1F5, + 9650 - 8208: 0xA1F8, + 9651 - 8208: 0xA1F7, + 9660 - 8208: 0xA88B, + 9661 - 8208: 0xA88C, + 9670 - 8208: 0xA1F4, + 9671 - 8208: 0xA1F3, + 9675 - 8208: 0xA1F0, + 9678 - 8208: 0xA1F2, + 9679 - 8208: 0xA1F1, + 9698 - 8208: 0xA88D, + 9699 - 8208: 0xA88E, + 9700 - 8208: 0xA88F, + 9701 - 8208: 0xA890, + 9733 - 8208: 0xA1EF, + 9734 - 8208: 0xA1EE, + 9737 - 8208: 0xA891, + 9792 - 8208: 0xA1E2, + 9794 - 8208: 0xA1E1, +} + +const encode2Low, encode2High = 164, 1106 + +var encode2 = [...]uint16{ + 164 - 164: 0xA1E8, + 167 - 164: 0xA1EC, + 168 - 164: 0xA1A7, + 176 - 164: 0xA1E3, + 177 - 164: 0xA1C0, + 183 - 164: 0xA1A4, + 215 - 164: 0xA1C1, + 224 - 164: 0xA8A4, + 225 - 164: 0xA8A2, + 232 - 164: 0xA8A8, + 233 - 164: 0xA8A6, + 234 - 164: 0xA8BA, + 236 - 164: 0xA8AC, + 237 - 164: 0xA8AA, + 242 - 164: 0xA8B0, + 243 - 164: 0xA8AE, + 247 - 164: 0xA1C2, + 249 - 164: 0xA8B4, + 250 - 164: 0xA8B2, + 252 - 164: 0xA8B9, + 257 - 164: 0xA8A1, + 275 - 164: 0xA8A5, + 283 - 164: 0xA8A7, + 299 - 164: 0xA8A9, + 324 - 164: 0xA8BD, + 328 - 164: 0xA8BE, + 333 - 164: 0xA8AD, + 363 - 164: 0xA8B1, + 462 - 164: 0xA8A3, + 464 - 164: 0xA8AB, + 466 - 164: 0xA8AF, + 468 - 164: 0xA8B3, + 470 - 164: 0xA8B5, + 472 - 164: 0xA8B6, + 474 - 164: 0xA8B7, + 476 - 164: 0xA8B8, + 505 - 164: 0xA8BF, + 593 - 164: 0xA8BB, + 609 - 164: 0xA8C0, + 711 - 164: 0xA1A6, + 713 - 164: 0xA1A5, + 714 - 164: 0xA840, + 715 - 164: 0xA841, + 729 - 164: 0xA842, + 913 - 164: 0xA6A1, + 914 - 164: 0xA6A2, + 915 - 164: 0xA6A3, + 916 - 164: 0xA6A4, + 917 - 164: 0xA6A5, + 918 - 164: 0xA6A6, + 919 - 164: 0xA6A7, + 920 - 164: 0xA6A8, + 921 - 164: 0xA6A9, + 922 - 164: 0xA6AA, + 923 - 164: 0xA6AB, + 924 - 164: 0xA6AC, + 925 - 164: 0xA6AD, + 926 - 164: 0xA6AE, + 927 - 164: 0xA6AF, + 928 - 164: 0xA6B0, + 929 - 164: 0xA6B1, + 931 - 164: 0xA6B2, + 932 - 164: 0xA6B3, + 933 - 164: 0xA6B4, + 934 - 164: 0xA6B5, + 935 - 164: 0xA6B6, + 936 - 164: 0xA6B7, + 937 - 164: 0xA6B8, + 945 - 164: 0xA6C1, + 946 - 164: 0xA6C2, + 947 - 164: 0xA6C3, + 948 - 164: 0xA6C4, + 949 - 164: 0xA6C5, + 950 - 164: 0xA6C6, + 951 - 164: 0xA6C7, + 952 - 164: 0xA6C8, + 953 - 164: 0xA6C9, + 954 - 164: 0xA6CA, + 955 - 164: 0xA6CB, + 956 - 164: 0xA6CC, + 957 - 164: 0xA6CD, + 958 - 164: 0xA6CE, + 959 - 164: 0xA6CF, + 960 - 164: 0xA6D0, + 961 - 164: 0xA6D1, + 963 - 164: 0xA6D2, + 964 - 164: 0xA6D3, + 965 - 164: 0xA6D4, + 966 - 164: 0xA6D5, + 967 - 164: 0xA6D6, + 968 - 164: 0xA6D7, + 969 - 164: 0xA6D8, + 1025 - 164: 0xA7A7, + 1040 - 164: 0xA7A1, + 1041 - 164: 0xA7A2, + 1042 - 164: 0xA7A3, + 1043 - 164: 0xA7A4, + 1044 - 164: 0xA7A5, + 1045 - 164: 0xA7A6, + 1046 - 164: 0xA7A8, + 1047 - 164: 0xA7A9, + 1048 - 164: 0xA7AA, + 1049 - 164: 0xA7AB, + 1050 - 164: 0xA7AC, + 1051 - 164: 0xA7AD, + 1052 - 164: 0xA7AE, + 1053 - 164: 0xA7AF, + 1054 - 164: 0xA7B0, + 1055 - 164: 0xA7B1, + 1056 - 164: 0xA7B2, + 1057 - 164: 0xA7B3, + 1058 - 164: 0xA7B4, + 1059 - 164: 0xA7B5, + 1060 - 164: 0xA7B6, + 1061 - 164: 0xA7B7, + 1062 - 164: 0xA7B8, + 1063 - 164: 0xA7B9, + 1064 - 164: 0xA7BA, + 1065 - 164: 0xA7BB, + 1066 - 164: 0xA7BC, + 1067 - 164: 0xA7BD, + 1068 - 164: 0xA7BE, + 1069 - 164: 0xA7BF, + 1070 - 164: 0xA7C0, + 1071 - 164: 0xA7C1, + 1072 - 164: 0xA7D1, + 1073 - 164: 0xA7D2, + 1074 - 164: 0xA7D3, + 1075 - 164: 0xA7D4, + 1076 - 164: 0xA7D5, + 1077 - 164: 0xA7D6, + 1078 - 164: 0xA7D8, + 1079 - 164: 0xA7D9, + 1080 - 164: 0xA7DA, + 1081 - 164: 0xA7DB, + 1082 - 164: 0xA7DC, + 1083 - 164: 0xA7DD, + 1084 - 164: 0xA7DE, + 1085 - 164: 0xA7DF, + 1086 - 164: 0xA7E0, + 1087 - 164: 0xA7E1, + 1088 - 164: 0xA7E2, + 1089 - 164: 0xA7E3, + 1090 - 164: 0xA7E4, + 1091 - 164: 0xA7E5, + 1092 - 164: 0xA7E6, + 1093 - 164: 0xA7E7, + 1094 - 164: 0xA7E8, + 1095 - 164: 0xA7E9, + 1096 - 164: 0xA7EA, + 1097 - 164: 0xA7EB, + 1098 - 164: 0xA7EC, + 1099 - 164: 0xA7ED, + 1100 - 164: 0xA7EE, + 1101 - 164: 0xA7EF, + 1102 - 164: 0xA7F0, + 1103 - 164: 0xA7F1, + 1105 - 164: 0xA7D7, +} + +const encode3Low, encode3High = 65072, 65510 + +var encode3 = [...]uint16{ + 65072 - 65072: 0xA955, + 65073 - 65072: 0xA6F2, + 65075 - 65072: 0xA6F4, + 65076 - 65072: 0xA6F5, + 65077 - 65072: 0xA6E0, + 65078 - 65072: 0xA6E1, + 65079 - 65072: 0xA6F0, + 65080 - 65072: 0xA6F1, + 65081 - 65072: 0xA6E2, + 65082 - 65072: 0xA6E3, + 65083 - 65072: 0xA6EE, + 65084 - 65072: 0xA6EF, + 65085 - 65072: 0xA6E6, + 65086 - 65072: 0xA6E7, + 65087 - 65072: 0xA6E4, + 65088 - 65072: 0xA6E5, + 65089 - 65072: 0xA6E8, + 65090 - 65072: 0xA6E9, + 65091 - 65072: 0xA6EA, + 65092 - 65072: 0xA6EB, + 65097 - 65072: 0xA968, + 65098 - 65072: 0xA969, + 65099 - 65072: 0xA96A, + 65100 - 65072: 0xA96B, + 65101 - 65072: 0xA96C, + 65102 - 65072: 0xA96D, + 65103 - 65072: 0xA96E, + 65104 - 65072: 0xA96F, + 65105 - 65072: 0xA970, + 65106 - 65072: 0xA971, + 65108 - 65072: 0xA972, + 65109 - 65072: 0xA973, + 65110 - 65072: 0xA974, + 65111 - 65072: 0xA975, + 65113 - 65072: 0xA976, + 65114 - 65072: 0xA977, + 65115 - 65072: 0xA978, + 65116 - 65072: 0xA979, + 65117 - 65072: 0xA97A, + 65118 - 65072: 0xA97B, + 65119 - 65072: 0xA97C, + 65120 - 65072: 0xA97D, + 65121 - 65072: 0xA97E, + 65122 - 65072: 0xA980, + 65123 - 65072: 0xA981, + 65124 - 65072: 0xA982, + 65125 - 65072: 0xA983, + 65126 - 65072: 0xA984, + 65128 - 65072: 0xA985, + 65129 - 65072: 0xA986, + 65130 - 65072: 0xA987, + 65131 - 65072: 0xA988, + 65281 - 65072: 0xA3A1, + 65282 - 65072: 0xA3A2, + 65283 - 65072: 0xA3A3, + 65284 - 65072: 0xA1E7, + 65285 - 65072: 0xA3A5, + 65286 - 65072: 0xA3A6, + 65287 - 65072: 0xA3A7, + 65288 - 65072: 0xA3A8, + 65289 - 65072: 0xA3A9, + 65290 - 65072: 0xA3AA, + 65291 - 65072: 0xA3AB, + 65292 - 65072: 0xA3AC, + 65293 - 65072: 0xA3AD, + 65294 - 65072: 0xA3AE, + 65295 - 65072: 0xA3AF, + 65296 - 65072: 0xA3B0, + 65297 - 65072: 0xA3B1, + 65298 - 65072: 0xA3B2, + 65299 - 65072: 0xA3B3, + 65300 - 65072: 0xA3B4, + 65301 - 65072: 0xA3B5, + 65302 - 65072: 0xA3B6, + 65303 - 65072: 0xA3B7, + 65304 - 65072: 0xA3B8, + 65305 - 65072: 0xA3B9, + 65306 - 65072: 0xA3BA, + 65307 - 65072: 0xA3BB, + 65308 - 65072: 0xA3BC, + 65309 - 65072: 0xA3BD, + 65310 - 65072: 0xA3BE, + 65311 - 65072: 0xA3BF, + 65312 - 65072: 0xA3C0, + 65313 - 65072: 0xA3C1, + 65314 - 65072: 0xA3C2, + 65315 - 65072: 0xA3C3, + 65316 - 65072: 0xA3C4, + 65317 - 65072: 0xA3C5, + 65318 - 65072: 0xA3C6, + 65319 - 65072: 0xA3C7, + 65320 - 65072: 0xA3C8, + 65321 - 65072: 0xA3C9, + 65322 - 65072: 0xA3CA, + 65323 - 65072: 0xA3CB, + 65324 - 65072: 0xA3CC, + 65325 - 65072: 0xA3CD, + 65326 - 65072: 0xA3CE, + 65327 - 65072: 0xA3CF, + 65328 - 65072: 0xA3D0, + 65329 - 65072: 0xA3D1, + 65330 - 65072: 0xA3D2, + 65331 - 65072: 0xA3D3, + 65332 - 65072: 0xA3D4, + 65333 - 65072: 0xA3D5, + 65334 - 65072: 0xA3D6, + 65335 - 65072: 0xA3D7, + 65336 - 65072: 0xA3D8, + 65337 - 65072: 0xA3D9, + 65338 - 65072: 0xA3DA, + 65339 - 65072: 0xA3DB, + 65340 - 65072: 0xA3DC, + 65341 - 65072: 0xA3DD, + 65342 - 65072: 0xA3DE, + 65343 - 65072: 0xA3DF, + 65344 - 65072: 0xA3E0, + 65345 - 65072: 0xA3E1, + 65346 - 65072: 0xA3E2, + 65347 - 65072: 0xA3E3, + 65348 - 65072: 0xA3E4, + 65349 - 65072: 0xA3E5, + 65350 - 65072: 0xA3E6, + 65351 - 65072: 0xA3E7, + 65352 - 65072: 0xA3E8, + 65353 - 65072: 0xA3E9, + 65354 - 65072: 0xA3EA, + 65355 - 65072: 0xA3EB, + 65356 - 65072: 0xA3EC, + 65357 - 65072: 0xA3ED, + 65358 - 65072: 0xA3EE, + 65359 - 65072: 0xA3EF, + 65360 - 65072: 0xA3F0, + 65361 - 65072: 0xA3F1, + 65362 - 65072: 0xA3F2, + 65363 - 65072: 0xA3F3, + 65364 - 65072: 0xA3F4, + 65365 - 65072: 0xA3F5, + 65366 - 65072: 0xA3F6, + 65367 - 65072: 0xA3F7, + 65368 - 65072: 0xA3F8, + 65369 - 65072: 0xA3F9, + 65370 - 65072: 0xA3FA, + 65371 - 65072: 0xA3FB, + 65372 - 65072: 0xA3FC, + 65373 - 65072: 0xA3FD, + 65374 - 65072: 0xA1AB, + 65504 - 65072: 0xA1E9, + 65505 - 65072: 0xA1EA, + 65506 - 65072: 0xA956, + 65507 - 65072: 0xA3FE, + 65508 - 65072: 0xA957, + 65509 - 65072: 0xA3A4, +} + +const encode4Low, encode4High = 63788, 64042 + +var encode4 = [...]uint16{ + 63788 - 63788: 0xFD9C, + 63865 - 63788: 0xFD9D, + 63893 - 63788: 0xFD9E, + 63975 - 63788: 0xFD9F, + 63985 - 63788: 0xFDA0, + 64012 - 63788: 0xFE40, + 64013 - 63788: 0xFE41, + 64014 - 63788: 0xFE42, + 64015 - 63788: 0xFE43, + 64017 - 63788: 0xFE44, + 64019 - 63788: 0xFE45, + 64020 - 63788: 0xFE46, + 64024 - 63788: 0xFE47, + 64031 - 63788: 0xFE48, + 64032 - 63788: 0xFE49, + 64033 - 63788: 0xFE4A, + 64035 - 63788: 0xFE4B, + 64036 - 63788: 0xFE4C, + 64039 - 63788: 0xFE4D, + 64040 - 63788: 0xFE4E, + 64041 - 63788: 0xFE4F, +} diff --git a/backend/vendor/golang.org/x/text/encoding/traditionalchinese/big5.go b/backend/vendor/golang.org/x/text/encoding/traditionalchinese/big5.go new file mode 100644 index 0000000..1fcddde --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/traditionalchinese/big5.go @@ -0,0 +1,199 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package traditionalchinese + +import ( + "unicode/utf8" + + "golang.org/x/text/encoding" + "golang.org/x/text/encoding/internal" + "golang.org/x/text/encoding/internal/identifier" + "golang.org/x/text/transform" +) + +// All is a list of all defined encodings in this package. +var All = []encoding.Encoding{Big5} + +// Big5 is the Big5 encoding, also known as Code Page 950. +var Big5 encoding.Encoding = &big5 + +var big5 = internal.Encoding{ + &internal.SimpleEncoding{big5Decoder{}, big5Encoder{}}, + "Big5", + identifier.Big5, +} + +type big5Decoder struct{ transform.NopResetter } + +func (big5Decoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size, s := rune(0), 0, "" +loop: + for ; nSrc < len(src); nSrc += size { + switch c0 := src[nSrc]; { + case c0 < utf8.RuneSelf: + r, size = rune(c0), 1 + + case 0x81 <= c0 && c0 < 0xff: + if nSrc+1 >= len(src) { + if !atEOF { + err = transform.ErrShortSrc + break loop + } + r, size = utf8.RuneError, 1 + goto write + } + c1 := src[nSrc+1] + switch { + case 0x40 <= c1 && c1 < 0x7f: + c1 -= 0x40 + case 0xa1 <= c1 && c1 < 0xff: + c1 -= 0x62 + case c1 < 0x40: + r, size = utf8.RuneError, 1 + goto write + default: + r, size = utf8.RuneError, 2 + goto write + } + r, size = '\ufffd', 2 + if i := int(c0-0x81)*157 + int(c1); i < len(decode) { + if 1133 <= i && i < 1167 { + // The two-rune special cases for LATIN CAPITAL / SMALL E WITH CIRCUMFLEX + // AND MACRON / CARON are from http://encoding.spec.whatwg.org/#big5 + switch i { + case 1133: + s = "\u00CA\u0304" + goto writeStr + case 1135: + s = "\u00CA\u030C" + goto writeStr + case 1164: + s = "\u00EA\u0304" + goto writeStr + case 1166: + s = "\u00EA\u030C" + goto writeStr + } + } + r = rune(decode[i]) + if r == 0 { + r = '\ufffd' + } + } + + default: + r, size = utf8.RuneError, 1 + } + + write: + if nDst+utf8.RuneLen(r) > len(dst) { + err = transform.ErrShortDst + break loop + } + nDst += utf8.EncodeRune(dst[nDst:], r) + continue loop + + writeStr: + if nDst+len(s) > len(dst) { + err = transform.ErrShortDst + break loop + } + nDst += copy(dst[nDst:], s) + continue loop + } + return nDst, nSrc, err +} + +type big5Encoder struct{ transform.NopResetter } + +func (big5Encoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + r, size := rune(0), 0 + for ; nSrc < len(src); nSrc += size { + r = rune(src[nSrc]) + + // Decode a 1-byte rune. + if r < utf8.RuneSelf { + size = 1 + if nDst >= len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst] = uint8(r) + nDst++ + continue + + } else { + // Decode a multi-byte rune. + r, size = utf8.DecodeRune(src[nSrc:]) + if size == 1 { + // All valid runes of size 1 (those below utf8.RuneSelf) were + // handled above. We have invalid UTF-8 or we haven't seen the + // full character yet. + if !atEOF && !utf8.FullRune(src[nSrc:]) { + err = transform.ErrShortSrc + break + } + } + } + + if r >= utf8.RuneSelf { + // func init checks that the switch covers all tables. + switch { + case encode0Low <= r && r < encode0High: + if r = rune(encode0[r-encode0Low]); r != 0 { + goto write2 + } + case encode1Low <= r && r < encode1High: + if r = rune(encode1[r-encode1Low]); r != 0 { + goto write2 + } + case encode2Low <= r && r < encode2High: + if r = rune(encode2[r-encode2Low]); r != 0 { + goto write2 + } + case encode3Low <= r && r < encode3High: + if r = rune(encode3[r-encode3Low]); r != 0 { + goto write2 + } + case encode4Low <= r && r < encode4High: + if r = rune(encode4[r-encode4Low]); r != 0 { + goto write2 + } + case encode5Low <= r && r < encode5High: + if r = rune(encode5[r-encode5Low]); r != 0 { + goto write2 + } + case encode6Low <= r && r < encode6High: + if r = rune(encode6[r-encode6Low]); r != 0 { + goto write2 + } + case encode7Low <= r && r < encode7High: + if r = rune(encode7[r-encode7Low]); r != 0 { + goto write2 + } + } + err = internal.ErrASCIIReplacement + break + } + + write2: + if nDst+2 > len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst+0] = uint8(r >> 8) + dst[nDst+1] = uint8(r) + nDst += 2 + continue + } + return nDst, nSrc, err +} + +func init() { + // Check that the hard-coded encode switch covers all tables. + if numEncodeTables != 8 { + panic("bad numEncodeTables") + } +} diff --git a/backend/vendor/golang.org/x/text/encoding/traditionalchinese/tables.go b/backend/vendor/golang.org/x/text/encoding/traditionalchinese/tables.go new file mode 100644 index 0000000..d909e38 --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/traditionalchinese/tables.go @@ -0,0 +1,37142 @@ +// generated by go run maketables.go; DO NOT EDIT + +// Package traditionalchinese provides Traditional Chinese encodings such as Big5. +package traditionalchinese // import "golang.org/x/text/encoding/traditionalchinese" + +// decode is the decoding table from Big5 code to Unicode. +// It is defined at http://encoding.spec.whatwg.org/index-big5.txt +var decode = [...]uint32{ + 942: 0x000043F0, + 943: 0x00004C32, + 944: 0x00004603, + 945: 0x000045A6, + 946: 0x00004578, + 947: 0x00027267, + 948: 0x00004D77, + 949: 0x000045B3, + 950: 0x00027CB1, + 951: 0x00004CE2, + 952: 0x00027CC5, + 953: 0x00003B95, + 954: 0x00004736, + 955: 0x00004744, + 956: 0x00004C47, + 957: 0x00004C40, + 958: 0x000242BF, + 959: 0x00023617, + 960: 0x00027352, + 961: 0x00026E8B, + 962: 0x000270D2, + 963: 0x00004C57, + 964: 0x0002A351, + 965: 0x0000474F, + 966: 0x000045DA, + 967: 0x00004C85, + 968: 0x00027C6C, + 969: 0x00004D07, + 970: 0x00004AA4, + 971: 0x000046A1, + 972: 0x00026B23, + 973: 0x00007225, + 974: 0x00025A54, + 975: 0x00021A63, + 976: 0x00023E06, + 977: 0x00023F61, + 978: 0x0000664D, + 979: 0x000056FB, + 981: 0x00007D95, + 982: 0x0000591D, + 983: 0x00028BB9, + 984: 0x00003DF4, + 985: 0x00009734, + 986: 0x00027BEF, + 987: 0x00005BDB, + 988: 0x00021D5E, + 989: 0x00005AA4, + 990: 0x00003625, + 991: 0x00029EB0, + 992: 0x00005AD1, + 993: 0x00005BB7, + 994: 0x00005CFC, + 995: 0x0000676E, + 996: 0x00008593, + 997: 0x00029945, + 998: 0x00007461, + 999: 0x0000749D, + 1000: 0x00003875, + 1001: 0x00021D53, + 1002: 0x0002369E, + 1003: 0x00026021, + 1004: 0x00003EEC, + 1005: 0x000258DE, + 1006: 0x00003AF5, + 1007: 0x00007AFC, + 1008: 0x00009F97, + 1009: 0x00024161, + 1010: 0x0002890D, + 1011: 0x000231EA, + 1012: 0x00020A8A, + 1013: 0x0002325E, + 1014: 0x0000430A, + 1015: 0x00008484, + 1016: 0x00009F96, + 1017: 0x0000942F, + 1018: 0x00004930, + 1019: 0x00008613, + 1020: 0x00005896, + 1021: 0x0000974A, + 1022: 0x00009218, + 1023: 0x000079D0, + 1024: 0x00007A32, + 1025: 0x00006660, + 1026: 0x00006A29, + 1027: 0x0000889D, + 1028: 0x0000744C, + 1029: 0x00007BC5, + 1030: 0x00006782, + 1031: 0x00007A2C, + 1032: 0x0000524F, + 1033: 0x00009046, + 1034: 0x000034E6, + 1035: 0x000073C4, + 1036: 0x00025DB9, + 1037: 0x000074C6, + 1038: 0x00009FC7, + 1039: 0x000057B3, + 1040: 0x0000492F, + 1041: 0x0000544C, + 1042: 0x00004131, + 1043: 0x0002368E, + 1044: 0x00005818, + 1045: 0x00007A72, + 1046: 0x00027B65, + 1047: 0x00008B8F, + 1048: 0x000046AE, + 1049: 0x00026E88, + 1050: 0x00004181, + 1051: 0x00025D99, + 1052: 0x00007BAE, + 1053: 0x000224BC, + 1054: 0x00009FC8, + 1055: 0x000224C1, + 1056: 0x000224C9, + 1057: 0x000224CC, + 1058: 0x00009FC9, + 1059: 0x00008504, + 1060: 0x000235BB, + 1061: 0x000040B4, + 1062: 0x00009FCA, + 1063: 0x000044E1, + 1064: 0x0002ADFF, + 1065: 0x000062C1, + 1066: 0x0000706E, + 1067: 0x00009FCB, + 1099: 0x000031C0, + 1100: 0x000031C1, + 1101: 0x000031C2, + 1102: 0x000031C3, + 1103: 0x000031C4, + 1104: 0x0002010C, + 1105: 0x000031C5, + 1106: 0x000200D1, + 1107: 0x000200CD, + 1108: 0x000031C6, + 1109: 0x000031C7, + 1110: 0x000200CB, + 1111: 0x00021FE8, + 1112: 0x000031C8, + 1113: 0x000200CA, + 1114: 0x000031C9, + 1115: 0x000031CA, + 1116: 0x000031CB, + 1117: 0x000031CC, + 1118: 0x0002010E, + 1119: 0x000031CD, + 1120: 0x000031CE, + 1121: 0x00000100, + 1122: 0x000000C1, + 1123: 0x000001CD, + 1124: 0x000000C0, + 1125: 0x00000112, + 1126: 0x000000C9, + 1127: 0x0000011A, + 1128: 0x000000C8, + 1129: 0x0000014C, + 1130: 0x000000D3, + 1131: 0x000001D1, + 1132: 0x000000D2, + 1134: 0x00001EBE, + 1136: 0x00001EC0, + 1137: 0x000000CA, + 1138: 0x00000101, + 1139: 0x000000E1, + 1140: 0x000001CE, + 1141: 0x000000E0, + 1142: 0x00000251, + 1143: 0x00000113, + 1144: 0x000000E9, + 1145: 0x0000011B, + 1146: 0x000000E8, + 1147: 0x0000012B, + 1148: 0x000000ED, + 1149: 0x000001D0, + 1150: 0x000000EC, + 1151: 0x0000014D, + 1152: 0x000000F3, + 1153: 0x000001D2, + 1154: 0x000000F2, + 1155: 0x0000016B, + 1156: 0x000000FA, + 1157: 0x000001D4, + 1158: 0x000000F9, + 1159: 0x000001D6, + 1160: 0x000001D8, + 1161: 0x000001DA, + 1162: 0x000001DC, + 1163: 0x000000FC, + 1165: 0x00001EBF, + 1167: 0x00001EC1, + 1168: 0x000000EA, + 1169: 0x00000261, + 1170: 0x000023DA, + 1171: 0x000023DB, + 1256: 0x0002A3A9, + 1257: 0x00021145, + 1259: 0x0000650A, + 1262: 0x00004E3D, + 1263: 0x00006EDD, + 1264: 0x00009D4E, + 1265: 0x000091DF, + 1268: 0x00027735, + 1269: 0x00006491, + 1270: 0x00004F1A, + 1271: 0x00004F28, + 1272: 0x00004FA8, + 1273: 0x00005156, + 1274: 0x00005174, + 1275: 0x0000519C, + 1276: 0x000051E4, + 1277: 0x000052A1, + 1278: 0x000052A8, + 1279: 0x0000533B, + 1280: 0x0000534E, + 1281: 0x000053D1, + 1282: 0x000053D8, + 1283: 0x000056E2, + 1284: 0x000058F0, + 1285: 0x00005904, + 1286: 0x00005907, + 1287: 0x00005932, + 1288: 0x00005934, + 1289: 0x00005B66, + 1290: 0x00005B9E, + 1291: 0x00005B9F, + 1292: 0x00005C9A, + 1293: 0x00005E86, + 1294: 0x0000603B, + 1295: 0x00006589, + 1296: 0x000067FE, + 1297: 0x00006804, + 1298: 0x00006865, + 1299: 0x00006D4E, + 1300: 0x000070BC, + 1301: 0x00007535, + 1302: 0x00007EA4, + 1303: 0x00007EAC, + 1304: 0x00007EBA, + 1305: 0x00007EC7, + 1306: 0x00007ECF, + 1307: 0x00007EDF, + 1308: 0x00007F06, + 1309: 0x00007F37, + 1310: 0x0000827A, + 1311: 0x000082CF, + 1312: 0x0000836F, + 1313: 0x000089C6, + 1314: 0x00008BBE, + 1315: 0x00008BE2, + 1316: 0x00008F66, + 1317: 0x00008F67, + 1318: 0x00008F6E, + 1319: 0x00007411, + 1320: 0x00007CFC, + 1321: 0x00007DCD, + 1322: 0x00006946, + 1323: 0x00007AC9, + 1324: 0x00005227, + 1329: 0x0000918C, + 1330: 0x000078B8, + 1331: 0x0000915E, + 1332: 0x000080BC, + 1334: 0x00008D0B, + 1335: 0x000080F6, + 1336: 0x000209E7, + 1339: 0x0000809F, + 1340: 0x00009EC7, + 1341: 0x00004CCD, + 1342: 0x00009DC9, + 1343: 0x00009E0C, + 1344: 0x00004C3E, + 1345: 0x00029DF6, + 1346: 0x0002700E, + 1347: 0x00009E0A, + 1348: 0x0002A133, + 1349: 0x000035C1, + 1351: 0x00006E9A, + 1352: 0x0000823E, + 1353: 0x00007519, + 1355: 0x00004911, + 1356: 0x00009A6C, + 1357: 0x00009A8F, + 1358: 0x00009F99, + 1359: 0x00007987, + 1360: 0x0002846C, + 1361: 0x00021DCA, + 1362: 0x000205D0, + 1363: 0x00022AE6, + 1364: 0x00004E24, + 1365: 0x00004E81, + 1366: 0x00004E80, + 1367: 0x00004E87, + 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19202: 0x00003561, + 19203: 0x000058E0, + 19204: 0x000058DC, + 19205: 0x0002123C, + 19206: 0x000058FB, + 19207: 0x00005BFF, + 19208: 0x00005743, + 19209: 0x0002A150, + 19210: 0x00024278, + 19211: 0x000093D3, + 19212: 0x000035A1, + 19213: 0x0000591F, + 19214: 0x000068A6, + 19215: 0x000036C3, + 19216: 0x00006E59, + 19217: 0x0002163E, + 19218: 0x00005A24, + 19219: 0x00005553, + 19220: 0x00021692, + 19221: 0x00008505, + 19222: 0x000059C9, + 19223: 0x00020D4E, + 19224: 0x00026C81, + 19225: 0x00026D2A, + 19226: 0x000217DC, + 19227: 0x000059D9, + 19228: 0x000217FB, + 19229: 0x000217B2, + 19230: 0x00026DA6, + 19231: 0x00006D71, + 19232: 0x00021828, + 19233: 0x000216D5, + 19234: 0x000059F9, + 19235: 0x00026E45, + 19236: 0x00005AAB, + 19237: 0x00005A63, + 19238: 0x000036E6, + 19239: 0x000249A9, + 19240: 0x00005A77, + 19241: 0x00003708, + 19242: 0x00005A96, + 19243: 0x00007465, + 19244: 0x00005AD3, + 19245: 0x00026FA1, + 19246: 0x00022554, + 19247: 0x00003D85, + 19248: 0x00021911, + 19249: 0x00003732, + 19250: 0x000216B8, + 19251: 0x00005E83, + 19252: 0x000052D0, + 19253: 0x00005B76, + 19254: 0x00006588, + 19255: 0x00005B7C, + 19256: 0x00027A0E, + 19257: 0x00004004, + 19258: 0x0000485D, + 19259: 0x00020204, + 19260: 0x00005BD5, + 19261: 0x00006160, + 19262: 0x00021A34, + 19263: 0x000259CC, + 19264: 0x000205A5, + 19265: 0x00005BF3, + 19266: 0x00005B9D, + 19267: 0x00004D10, + 19268: 0x00005C05, + 19269: 0x00021B44, + 19270: 0x00005C13, + 19271: 0x000073CE, + 19272: 0x00005C14, + 19273: 0x00021CA5, + 19274: 0x00026B28, + 19275: 0x00005C49, + 19276: 0x000048DD, + 19277: 0x00005C85, + 19278: 0x00005CE9, + 19279: 0x00005CEF, + 19280: 0x00005D8B, + 19281: 0x00021DF9, + 19282: 0x00021E37, + 19283: 0x00005D10, + 19284: 0x00005D18, + 19285: 0x00005D46, + 19286: 0x00021EA4, + 19287: 0x00005CBA, + 19288: 0x00005DD7, + 19289: 0x000082FC, + 19290: 0x0000382D, + 19291: 0x00024901, + 19292: 0x00022049, + 19293: 0x00022173, + 19294: 0x00008287, + 19295: 0x00003836, + 19296: 0x00003BC2, + 19297: 0x00005E2E, + 19298: 0x00006A8A, + 19299: 0x00005E75, + 19300: 0x00005E7A, + 19301: 0x000244BC, + 19302: 0x00020CD3, + 19303: 0x000053A6, + 19304: 0x00004EB7, + 19305: 0x00005ED0, + 19306: 0x000053A8, + 19307: 0x00021771, + 19308: 0x00005E09, + 19309: 0x00005EF4, + 19310: 0x00028482, + 19311: 0x00005EF9, + 19312: 0x00005EFB, + 19313: 0x000038A0, + 19314: 0x00005EFC, + 19315: 0x0000683E, + 19316: 0x0000941B, + 19317: 0x00005F0D, + 19318: 0x000201C1, + 19319: 0x0002F894, + 19320: 0x00003ADE, + 19321: 0x000048AE, + 19322: 0x0002133A, + 19323: 0x00005F3A, + 19324: 0x00026888, + 19325: 0x000223D0, + 19326: 0x00005F58, + 19327: 0x00022471, + 19328: 0x00005F63, + 19329: 0x000097BD, + 19330: 0x00026E6E, + 19331: 0x00005F72, + 19332: 0x00009340, + 19333: 0x00028A36, + 19334: 0x00005FA7, + 19335: 0x00005DB6, + 19336: 0x00003D5F, + 19337: 0x00025250, + 19338: 0x00021F6A, + 19339: 0x000270F8, + 19340: 0x00022668, + 19341: 0x000091D6, + 19342: 0x0002029E, + 19343: 0x00028A29, + 19344: 0x00006031, + 19345: 0x00006685, + 19346: 0x00021877, + 19347: 0x00003963, + 19348: 0x00003DC7, + 19349: 0x00003639, + 19350: 0x00005790, + 19351: 0x000227B4, + 19352: 0x00007971, + 19353: 0x00003E40, + 19354: 0x0000609E, + 19355: 0x000060A4, + 19356: 0x000060B3, + 19357: 0x00024982, + 19358: 0x0002498F, + 19359: 0x00027A53, + 19360: 0x000074A4, + 19361: 0x000050E1, + 19362: 0x00005AA0, + 19363: 0x00006164, + 19364: 0x00008424, + 19365: 0x00006142, + 19366: 0x0002F8A6, + 19367: 0x00026ED2, + 19368: 0x00006181, + 19369: 0x000051F4, + 19370: 0x00020656, + 19371: 0x00006187, + 19372: 0x00005BAA, + 19373: 0x00023FB7, + 19374: 0x0002285F, + 19375: 0x000061D3, + 19376: 0x00028B9D, + 19377: 0x0002995D, + 19378: 0x000061D0, + 19379: 0x00003932, + 19380: 0x00022980, + 19381: 0x000228C1, + 19382: 0x00006023, + 19383: 0x0000615C, + 19384: 0x0000651E, + 19385: 0x0000638B, + 19386: 0x00020118, + 19387: 0x000062C5, + 19388: 0x00021770, + 19389: 0x000062D5, + 19390: 0x00022E0D, + 19391: 0x0000636C, + 19392: 0x000249DF, + 19393: 0x00003A17, + 19394: 0x00006438, + 19395: 0x000063F8, + 19396: 0x0002138E, + 19397: 0x000217FC, + 19398: 0x00006490, + 19399: 0x00006F8A, + 19400: 0x00022E36, + 19401: 0x00009814, + 19402: 0x0002408C, + 19403: 0x0002571D, + 19404: 0x000064E1, + 19405: 0x000064E5, + 19406: 0x0000947B, + 19407: 0x00003A66, + 19408: 0x0000643A, + 19409: 0x00003A57, + 19410: 0x0000654D, + 19411: 0x00006F16, + 19412: 0x00024A28, + 19413: 0x00024A23, + 19414: 0x00006585, + 19415: 0x0000656D, + 19416: 0x0000655F, + 19417: 0x0002307E, + 19418: 0x000065B5, + 19419: 0x00024940, + 19420: 0x00004B37, + 19421: 0x000065D1, + 19422: 0x000040D8, + 19423: 0x00021829, + 19424: 0x000065E0, + 19425: 0x000065E3, + 19426: 0x00005FDF, + 19427: 0x00023400, + 19428: 0x00006618, + 19429: 0x000231F7, + 19430: 0x000231F8, + 19431: 0x00006644, + 19432: 0x000231A4, + 19433: 0x000231A5, + 19434: 0x0000664B, + 19435: 0x00020E75, + 19436: 0x00006667, + 19437: 0x000251E6, + 19438: 0x00006673, + 19439: 0x00006674, + 19440: 0x00021E3D, + 19441: 0x00023231, + 19442: 0x000285F4, + 19443: 0x000231C8, + 19444: 0x00025313, + 19445: 0x000077C5, + 19446: 0x000228F7, + 19447: 0x000099A4, + 19448: 0x00006702, + 19449: 0x0002439C, + 19450: 0x00024A21, + 19451: 0x00003B2B, + 19452: 0x000069FA, + 19453: 0x000237C2, + 19454: 0x0000675E, + 19455: 0x00006767, + 19456: 0x00006762, + 19457: 0x000241CD, + 19458: 0x000290ED, + 19459: 0x000067D7, + 19460: 0x000044E9, + 19461: 0x00006822, + 19462: 0x00006E50, + 19463: 0x0000923C, + 19464: 0x00006801, + 19465: 0x000233E6, + 19466: 0x00026DA0, + 19467: 0x0000685D, + 19468: 0x0002346F, + 19469: 0x000069E1, + 19470: 0x00006A0B, + 19471: 0x00028ADF, + 19472: 0x00006973, + 19473: 0x000068C3, + 19474: 0x000235CD, + 19475: 0x00006901, + 19476: 0x00006900, + 19477: 0x00003D32, + 19478: 0x00003A01, + 19479: 0x0002363C, + 19480: 0x00003B80, + 19481: 0x000067AC, + 19482: 0x00006961, + 19483: 0x00028A4A, + 19484: 0x000042FC, + 19485: 0x00006936, + 19486: 0x00006998, + 19487: 0x00003BA1, + 19488: 0x000203C9, + 19489: 0x00008363, + 19490: 0x00005090, + 19491: 0x000069F9, + 19492: 0x00023659, + 19493: 0x0002212A, + 19494: 0x00006A45, + 19495: 0x00023703, + 19496: 0x00006A9D, + 19497: 0x00003BF3, + 19498: 0x000067B1, + 19499: 0x00006AC8, + 19500: 0x0002919C, + 19501: 0x00003C0D, + 19502: 0x00006B1D, + 19503: 0x00020923, + 19504: 0x000060DE, + 19505: 0x00006B35, + 19506: 0x00006B74, + 19507: 0x000227CD, + 19508: 0x00006EB5, + 19509: 0x00023ADB, + 19510: 0x000203B5, + 19511: 0x00021958, + 19512: 0x00003740, + 19513: 0x00005421, + 19514: 0x00023B5A, + 19515: 0x00006BE1, + 19516: 0x00023EFC, + 19517: 0x00006BDC, + 19518: 0x00006C37, + 19519: 0x0002248B, + 19520: 0x000248F1, + 19521: 0x00026B51, + 19522: 0x00006C5A, + 19523: 0x00008226, + 19524: 0x00006C79, + 19525: 0x00023DBC, + 19526: 0x000044C5, + 19527: 0x00023DBD, + 19528: 0x000241A4, + 19529: 0x0002490C, + 19530: 0x00024900, + 19531: 0x00023CC9, + 19532: 0x000036E5, + 19533: 0x00003CEB, + 19534: 0x00020D32, + 19535: 0x00009B83, + 19536: 0x000231F9, + 19537: 0x00022491, + 19538: 0x00007F8F, + 19539: 0x00006837, + 19540: 0x00026D25, + 19541: 0x00026DA1, + 19542: 0x00026DEB, + 19543: 0x00006D96, + 19544: 0x00006D5C, + 19545: 0x00006E7C, + 19546: 0x00006F04, + 19547: 0x0002497F, + 19548: 0x00024085, + 19549: 0x00026E72, + 19550: 0x00008533, + 19551: 0x00026F74, + 19552: 0x000051C7, + 19553: 0x00006C9C, + 19554: 0x00006E1D, + 19555: 0x0000842E, + 19556: 0x00028B21, + 19557: 0x00006E2F, + 19558: 0x00023E2F, + 19559: 0x00007453, + 19560: 0x00023F82, + 19561: 0x000079CC, + 19562: 0x00006E4F, + 19563: 0x00005A91, + 19564: 0x0002304B, + 19565: 0x00006FF8, + 19566: 0x0000370D, + 19567: 0x00006F9D, + 19568: 0x00023E30, + 19569: 0x00006EFA, + 19570: 0x00021497, + 19571: 0x0002403D, + 19572: 0x00004555, + 19573: 0x000093F0, + 19574: 0x00006F44, + 19575: 0x00006F5C, + 19576: 0x00003D4E, + 19577: 0x00006F74, + 19578: 0x00029170, + 19579: 0x00003D3B, + 19580: 0x00006F9F, + 19581: 0x00024144, + 19582: 0x00006FD3, + 19583: 0x00024091, + 19584: 0x00024155, + 19585: 0x00024039, + 19586: 0x00023FF0, + 19587: 0x00023FB4, + 19588: 0x0002413F, + 19589: 0x000051DF, + 19590: 0x00024156, + 19591: 0x00024157, + 19592: 0x00024140, + 19593: 0x000261DD, + 19594: 0x0000704B, + 19595: 0x0000707E, + 19596: 0x000070A7, + 19597: 0x00007081, + 19598: 0x000070CC, + 19599: 0x000070D5, + 19600: 0x000070D6, + 19601: 0x000070DF, + 19602: 0x00004104, + 19603: 0x00003DE8, + 19604: 0x000071B4, + 19605: 0x00007196, + 19606: 0x00024277, + 19607: 0x0000712B, + 19608: 0x00007145, + 19609: 0x00005A88, + 19610: 0x0000714A, + 19611: 0x0000716E, + 19612: 0x00005C9C, + 19613: 0x00024365, + 19614: 0x0000714F, + 19615: 0x00009362, + 19616: 0x000242C1, + 19617: 0x0000712C, + 19618: 0x0002445A, + 19619: 0x00024A27, + 19620: 0x00024A22, + 19621: 0x000071BA, + 19622: 0x00028BE8, + 19623: 0x000070BD, + 19624: 0x0000720E, + 19625: 0x00009442, + 19626: 0x00007215, + 19627: 0x00005911, + 19628: 0x00009443, + 19629: 0x00007224, + 19630: 0x00009341, + 19631: 0x00025605, + 19632: 0x0000722E, + 19633: 0x00007240, + 19634: 0x00024974, + 19635: 0x000068BD, + 19636: 0x00007255, + 19637: 0x00007257, + 19638: 0x00003E55, + 19639: 0x00023044, + 19640: 0x0000680D, + 19641: 0x00006F3D, + 19642: 0x00007282, + 19643: 0x0000732A, + 19644: 0x0000732B, + 19645: 0x00024823, + 19646: 0x0002882B, + 19647: 0x000048ED, + 19648: 0x00028804, + 19649: 0x00007328, + 19650: 0x0000732E, + 19651: 0x000073CF, + 19652: 0x000073AA, + 19653: 0x00020C3A, + 19654: 0x00026A2E, + 19655: 0x000073C9, + 19656: 0x00007449, + 19657: 0x000241E2, + 19658: 0x000216E7, + 19659: 0x00024A24, + 19660: 0x00006623, + 19661: 0x000036C5, + 19662: 0x000249B7, + 19663: 0x0002498D, + 19664: 0x000249FB, + 19665: 0x000073F7, + 19666: 0x00007415, + 19667: 0x00006903, + 19668: 0x00024A26, + 19669: 0x00007439, + 19670: 0x000205C3, + 19671: 0x00003ED7, + 19672: 0x0000745C, + 19673: 0x000228AD, + 19674: 0x00007460, + 19675: 0x00028EB2, + 19676: 0x00007447, + 19677: 0x000073E4, + 19678: 0x00007476, + 19679: 0x000083B9, + 19680: 0x0000746C, + 19681: 0x00003730, + 19682: 0x00007474, + 19683: 0x000093F1, + 19684: 0x00006A2C, + 19685: 0x00007482, + 19686: 0x00004953, + 19687: 0x00024A8C, + 19688: 0x0002415F, + 19689: 0x00024A79, + 19690: 0x00028B8F, + 19691: 0x00005B46, + 19692: 0x00028C03, + 19693: 0x0002189E, + 19694: 0x000074C8, + 19695: 0x00021988, + 19696: 0x0000750E, + 19697: 0x000074E9, + 19698: 0x0000751E, + 19699: 0x00028ED9, + 19700: 0x00021A4B, + 19701: 0x00005BD7, + 19702: 0x00028EAC, + 19703: 0x00009385, + 19704: 0x0000754D, + 19705: 0x0000754A, + 19706: 0x00007567, + 19707: 0x0000756E, + 19708: 0x00024F82, + 19709: 0x00003F04, + 19710: 0x00024D13, + 19711: 0x0000758E, + 19712: 0x0000745D, + 19713: 0x0000759E, + 19714: 0x000075B4, + 19715: 0x00007602, + 19716: 0x0000762C, + 19717: 0x00007651, + 19718: 0x0000764F, + 19719: 0x0000766F, + 19720: 0x00007676, + 19721: 0x000263F5, + 19722: 0x00007690, + 19723: 0x000081EF, + 19724: 0x000037F8, + 19725: 0x00026911, + 19726: 0x0002690E, + 19727: 0x000076A1, + 19728: 0x000076A5, + 19729: 0x000076B7, + 19730: 0x000076CC, + 19731: 0x00026F9F, + 19732: 0x00008462, + 19733: 0x0002509D, + 19734: 0x0002517D, + 19735: 0x00021E1C, + 19736: 0x0000771E, + 19737: 0x00007726, + 19738: 0x00007740, + 19739: 0x000064AF, + 19740: 0x00025220, + 19741: 0x00007758, + 19742: 0x000232AC, + 19743: 0x000077AF, + 19744: 0x00028964, + 19745: 0x00028968, + 19746: 0x000216C1, + 19747: 0x000077F4, + 19748: 0x00007809, + 19749: 0x00021376, + 19750: 0x00024A12, + 19751: 0x000068CA, + 19752: 0x000078AF, + 19753: 0x000078C7, + 19754: 0x000078D3, + 19755: 0x000096A5, + 19756: 0x0000792E, + 19757: 0x000255E0, + 19758: 0x000078D7, + 19759: 0x00007934, + 19760: 0x000078B1, + 19761: 0x0002760C, + 19762: 0x00008FB8, + 19763: 0x00008884, + 19764: 0x00028B2B, + 19765: 0x00026083, + 19766: 0x0002261C, + 19767: 0x00007986, + 19768: 0x00008900, + 19769: 0x00006902, + 19770: 0x00007980, + 19771: 0x00025857, + 19772: 0x0000799D, + 19773: 0x00027B39, + 19774: 0x0000793C, + 19775: 0x000079A9, + 19776: 0x00006E2A, + 19777: 0x00027126, + 19778: 0x00003EA8, + 19779: 0x000079C6, + 19780: 0x0002910D, + 19781: 0x000079D4, +} + +const numEncodeTables = 8 + +// encodeX are the encoding tables from Unicode to Big5 code, +// sorted by decreasing length. +// encode0: 42633 entries for runes in [131105, 173738). +// encode1: 29004 entries for runes in [ 11904, 40908). +// encode2: 2176 entries for runes in [ 7870, 10046). +// encode3: 939 entries for runes in [ 167, 1106). +// encode4: 446 entries for runes in [ 65072, 65518). +// encode5: 432 entries for runes in [194597, 195029). +// encode6: 263 entries for runes in [ 63751, 64014). +// encode7: 1 entries for runes in [175615, 175616). + +const encode0Low, encode0High = 131105, 173738 + +var encode0 = [...]uint16{ + 131105 - 131105: 0x9C71, + 131134 - 131105: 0x9375, + 131142 - 131105: 0x9376, + 131150 - 131105: 0x9548, + 131176 - 131105: 0x8EC6, + 131206 - 131105: 0x8BC5, + 131207 - 131105: 0x8BFA, + 131210 - 131105: 0xC87C, + 131220 - 131105: 0x9AB4, + 131274 - 131105: 0x884E, + 131275 - 131105: 0x884B, + 131276 - 131105: 0xC87A, + 131277 - 131105: 0x8848, + 131281 - 131105: 0x8847, + 131310 - 131105: 0xA0F6, + 131340 - 131105: 0x8845, + 131342 - 131105: 0x8853, + 131352 - 131105: 0xFCAD, + 131492 - 131105: 0x8CF5, + 131497 - 131105: 0x8AAD, + 131499 - 131105: 0x9272, + 131521 - 131105: 0xFC47, + 131540 - 131105: 0x94DF, + 131570 - 131105: 0x9FD1, + 131588 - 131105: 0xFBCB, + 131596 - 131105: 0x927D, + 131604 - 131105: 0x98A4, + 131641 - 131105: 0x8CF9, + 131675 - 131105: 0x94E7, + 131700 - 131105: 0x90CB, + 131701 - 131105: 0x927B, + 131737 - 131105: 0x94D8, + 131742 - 131105: 0xFC5F, + 131744 - 131105: 0xFA54, + 131767 - 131105: 0x9AB5, + 131775 - 131105: 0x96DA, + 131776 - 131105: 0x9279, + 131813 - 131105: 0xFA74, + 131850 - 131105: 0x9275, + 131877 - 131105: 0x8DFB, + 131905 - 131105: 0x8A49, + 131909 - 131105: 0x92DF, + 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166473 - 131105: 0x96FE, + 166474 - 131105: 0xFD4F, + 166475 - 131105: 0x95DE, + 166489 - 131105: 0x98B0, + 166490 - 131105: 0xA040, + 166529 - 131105: 0x97BD, + 166530 - 131105: 0x977D, + 166531 - 131105: 0x97F5, + 166554 - 131105: 0x9BAC, + 166555 - 131105: 0xFADA, + 166556 - 131105: 0x92C2, + 166592 - 131105: 0x97B1, + 166598 - 131105: 0x907B, + 166603 - 131105: 0x93FE, + 166604 - 131105: 0x947B, + 166606 - 131105: 0x9777, + 166622 - 131105: 0xFABE, + 166623 - 131105: 0xFD43, + 166624 - 131105: 0x90C6, + 166625 - 131105: 0x90A4, + 166626 - 131105: 0x90A8, + 166627 - 131105: 0x94A9, + 166629 - 131105: 0x90A9, + 166634 - 131105: 0x8C65, + 166652 - 131105: 0x95E0, + 166668 - 131105: 0x907D, + 166675 - 131105: 0x9265, + 166689 - 131105: 0xFDBA, + 166690 - 131105: 0x93C4, + 166699 - 131105: 0xFEED, + 166700 - 131105: 0x9DAB, + 166701 - 131105: 0xA0E3, + 166703 - 131105: 0x9648, + 166726 - 131105: 0x9D53, + 166732 - 131105: 0x8AA9, + 166734 - 131105: 0x9BC5, + 166736 - 131105: 0x965D, + 166755 - 131105: 0x975F, + 166756 - 131105: 0x965F, + 166757 - 131105: 0x966E, + 166758 - 131105: 0xFB5D, + 166764 - 131105: 0x9DB1, + 166799 - 131105: 0xFEA3, + 166809 - 131105: 0x9DB2, + 166812 - 131105: 0x95AE, + 166813 - 131105: 0xFCA3, + 166841 - 131105: 0x8769, + 166850 - 131105: 0xA0A2, + 166853 - 131105: 0x9655, + 166868 - 131105: 0x9D54, + 166871 - 131105: 0x9341, + 166873 - 131105: 0x95AD, + 166874 - 131105: 0x91D5, + 166887 - 131105: 0x977A, + 166888 - 131105: 0xFDFC, + 166889 - 131105: 0x8E47, + 166890 - 131105: 0x93FD, + 166891 - 131105: 0x90A5, + 166892 - 131105: 0x90AC, + 166901 - 131105: 0x95AC, + 166911 - 131105: 0x90AE, + 166915 - 131105: 0xFEA5, + 166921 - 131105: 0x9D56, + 166940 - 131105: 0x97E3, + 166941 - 131105: 0x95E2, + 166947 - 131105: 0x9466, + 166950 - 131105: 0x9647, + 166955 - 131105: 0x91B8, + 166960 - 131105: 0x9CEC, + 166969 - 131105: 0x90AD, + 166971 - 131105: 0x95E3, + 167114 - 131105: 0x8B4F, + 167117 - 131105: 0x8AE3, + 167122 - 131105: 0x8B4D, + 167220 - 131105: 0x95EA, + 167321 - 131105: 0x8B4E, + 167353 - 131105: 0x8CC1, + 167439 - 131105: 0x8BED, + 167478 - 131105: 0x91D9, + 167481 - 131105: 0xA0A4, + 167525 - 131105: 0x95F5, + 167526 - 131105: 0x95F4, + 167575 - 131105: 0x9FB3, + 167596 - 131105: 0xFEAF, + 167602 - 131105: 0xFE72, + 167603 - 131105: 0x927A, + 167641 - 131105: 0xFEAC, + 167655 - 131105: 0x95F3, + 167877 - 131105: 0x9D58, + 168057 - 131105: 0x8D46, + 168072 - 131105: 0x9372, + 168075 - 131105: 0x91C5, + 168083 - 131105: 0x9642, + 168111 - 131105: 0x90CD, + 168112 - 131105: 0x95FE, + 168113 - 131105: 0x9159, + 168128 - 131105: 0x9C65, + 168164 - 131105: 0x97CC, + 168165 - 131105: 0x90CE, + 168172 - 131105: 0x9D59, + 168173 - 131105: 0xFCF5, + 168205 - 131105: 0xFEFD, + 168208 - 131105: 0x9D5B, + 168252 - 131105: 0x9D5C, + 168269 - 131105: 0x937E, + 168283 - 131105: 0x98AC, + 168286 - 131105: 0x9D5E, + 168304 - 131105: 0xFDD0, + 168348 - 131105: 0xFD60, + 168360 - 131105: 0x9CCF, + 168405 - 131105: 0x90DD, + 168427 - 131105: 0x90E0, + 168989 - 131105: 0x90F3, + 168992 - 131105: 0x98B1, + 169011 - 131105: 0x90F0, + 169023 - 131105: 0x93BD, + 169032 - 131105: 0x95B7, + 169168 - 131105: 0x9F46, + 169177 - 131105: 0x8E4B, + 169178 - 131105: 0x9658, + 169189 - 131105: 0x8A4C, + 169191 - 131105: 0x9D63, + 169374 - 131105: 0x9ECF, + 169392 - 131105: 0x9D65, + 169400 - 131105: 0x9D66, + 169431 - 131105: 0x965A, + 169449 - 131105: 0x9D64, + 169460 - 131105: 0x8A6C, + 169760 - 131105: 0x8AD9, + 169778 - 131105: 0x9D67, + 169940 - 131105: 0x8A70, + 170000 - 131105: 0x8BF3, + 170071 - 131105: 0x9150, + 170148 - 131105: 0x9CC1, + 170193 - 131105: 0x9D68, + 170218 - 131105: 0x93A7, + 170225 - 131105: 0x9674, + 170234 - 131105: 0x8CFD, + 170243 - 131105: 0xA0EF, + 170245 - 131105: 0x9151, + 170287 - 131105: 0x96C1, + 170309 - 131105: 0x8777, + 170311 - 131105: 0x8C64, + 170312 - 131105: 0x9676, + 170313 - 131105: 0x9D69, + 170333 - 131105: 0xFCA4, + 170346 - 131105: 0x9D6A, + 170397 - 131105: 0x924E, + 170435 - 131105: 0x9D6B, + 170441 - 131105: 0x9BC1, + 170536 - 131105: 0x9D6C, + 170573 - 131105: 0x8A65, + 170757 - 131105: 0x915D, + 170766 - 131105: 0x9D6D, + 170965 - 131105: 0x915A, + 171123 - 131105: 0x8C42, + 171181 - 131105: 0x9CC0, + 171326 - 131105: 0x916A, + 171354 - 131105: 0x9D6E, + 171388 - 131105: 0x9EA6, + 171416 - 131105: 0x9DCD, + 171419 - 131105: 0x9D6F, + 171510 - 131105: 0x89BB, + 171526 - 131105: 0x9EF9, + 171565 - 131105: 0x96B4, + 171624 - 131105: 0x9172, + 171692 - 131105: 0x9EC8, + 171696 - 131105: 0x8771, + 171715 - 131105: 0x8B55, + 171768 - 131105: 0x9D71, + 171811 - 131105: 0x9D72, + 171824 - 131105: 0x9ECC, + 171959 - 131105: 0x9174, + 171998 - 131105: 0x9ED0, + 172052 - 131105: 0x905C, + 172167 - 131105: 0x8ED2, + 172217 - 131105: 0x91A8, + 172257 - 131105: 0x9177, + 172269 - 131105: 0x96BF, + 172275 - 131105: 0x96C0, + 172280 - 131105: 0x8FB1, + 172286 - 131105: 0x96B7, + 172295 - 131105: 0x8C55, + 172323 - 131105: 0x9178, + 172339 - 131105: 0x89BE, + 172340 - 131105: 0x917C, + 172368 - 131105: 0xFB77, + 172434 - 131105: 0x9175, + 172435 - 131105: 0x91A3, + 172459 - 131105: 0x9176, + 172468 - 131105: 0x96BE, + 172469 - 131105: 0x8D49, + 172511 - 131105: 0x9179, + 172533 - 131105: 0x96B6, + 172576 - 131105: 0x91A4, + 172595 - 131105: 0x91A6, + 172691 - 131105: 0x9D75, + 172703 - 131105: 0x9052, + 172722 - 131105: 0xA045, + 172724 - 131105: 0x91A9, + 172726 - 131105: 0x98AA, + 172730 - 131105: 0x8C5F, + 172733 - 131105: 0x8BAA, + 172767 - 131105: 0x9CDD, + 172799 - 131105: 0x9D77, + 172881 - 131105: 0x8756, + 172969 - 131105: 0x8940, + 173108 - 131105: 0x9EEC, + 173147 - 131105: 0x93AA, + 173510 - 131105: 0x9478, + 173515 - 131105: 0x9D7A, + 173569 - 131105: 0x8AC9, + 173618 - 131105: 0x8B4B, + 173642 - 131105: 0x9FEC, + 173659 - 131105: 0x8AE2, + 173737 - 131105: 0x9E75, +} + +const encode1Low, encode1High = 11904, 40908 + +var encode1 = [...]uint16{ + 11904 - 11904: 0xC8D6, + 11908 - 11904: 0xC8D7, + 11910 - 11904: 0xC8D8, + 11911 - 11904: 0xC8D9, + 11912 - 11904: 0xC8DA, + 11914 - 11904: 0xC8DB, + 11916 - 11904: 0xC8DC, + 11917 - 11904: 0xC8DD, + 11925 - 11904: 0xC8DE, + 11932 - 11904: 0xC8DF, + 11933 - 11904: 0xC8E0, + 11941 - 11904: 0xC8E1, + 11943 - 11904: 0xC8E2, + 11946 - 11904: 0xC8E3, + 11948 - 11904: 0xC8E4, + 11950 - 11904: 0xC8E5, + 11958 - 11904: 0xC8E6, + 11964 - 11904: 0xC8E7, + 11966 - 11904: 0xC8E8, + 11974 - 11904: 0xC8E9, + 11978 - 11904: 0xC8EA, + 11980 - 11904: 0xC8EB, + 11981 - 11904: 0xC8EC, + 11983 - 11904: 0xC8ED, + 11990 - 11904: 0xC8EE, + 11991 - 11904: 0xC8EF, + 11998 - 11904: 0xC8F0, + 12003 - 11904: 0xC8F1, + 12083 - 11904: 0xC6CD, + 12288 - 11904: 0xA140, + 12289 - 11904: 0xA142, + 12290 - 11904: 0xA143, + 12291 - 11904: 0xC6DE, + 12293 - 11904: 0xC6E0, + 12294 - 11904: 0xC6E1, + 12295 - 11904: 0xC6E2, + 12296 - 11904: 0xA171, + 12297 - 11904: 0xA172, + 12298 - 11904: 0xA16D, + 12299 - 11904: 0xA16E, + 12300 - 11904: 0xA175, + 12301 - 11904: 0xA176, + 12302 - 11904: 0xA179, + 12303 - 11904: 0xA17A, + 12304 - 11904: 0xA169, + 12305 - 11904: 0xA16A, + 12306 - 11904: 0xA245, + 12308 - 11904: 0xA165, + 12309 - 11904: 0xA166, + 12317 - 11904: 0xA1A9, + 12318 - 11904: 0xA1AA, + 12321 - 11904: 0xA2C3, + 12322 - 11904: 0xA2C4, + 12323 - 11904: 0xA2C5, + 12324 - 11904: 0xA2C6, + 12325 - 11904: 0xA2C7, + 12326 - 11904: 0xA2C8, + 12327 - 11904: 0xA2C9, + 12328 - 11904: 0xA2CA, + 12329 - 11904: 0xA2CB, + 12353 - 11904: 0xC6E7, + 12354 - 11904: 0xC6E8, + 12355 - 11904: 0xC6E9, + 12356 - 11904: 0xC6EA, + 12357 - 11904: 0xC6EB, + 12358 - 11904: 0xC6EC, + 12359 - 11904: 0xC6ED, + 12360 - 11904: 0xC6EE, + 12361 - 11904: 0xC6EF, + 12362 - 11904: 0xC6F0, + 12363 - 11904: 0xC6F1, + 12364 - 11904: 0xC6F2, + 12365 - 11904: 0xC6F3, + 12366 - 11904: 0xC6F4, + 12367 - 11904: 0xC6F5, + 12368 - 11904: 0xC6F6, + 12369 - 11904: 0xC6F7, + 12370 - 11904: 0xC6F8, + 12371 - 11904: 0xC6F9, + 12372 - 11904: 0xC6FA, + 12373 - 11904: 0xC6FB, + 12374 - 11904: 0xC6FC, + 12375 - 11904: 0xC6FD, + 12376 - 11904: 0xC6FE, + 12377 - 11904: 0xC740, + 12378 - 11904: 0xC741, + 12379 - 11904: 0xC742, + 12380 - 11904: 0xC743, + 12381 - 11904: 0xC744, + 12382 - 11904: 0xC745, + 12383 - 11904: 0xC746, + 12384 - 11904: 0xC747, + 12385 - 11904: 0xC748, + 12386 - 11904: 0xC749, + 12387 - 11904: 0xC74A, + 12388 - 11904: 0xC74B, + 12389 - 11904: 0xC74C, + 12390 - 11904: 0xC74D, + 12391 - 11904: 0xC74E, + 12392 - 11904: 0xC74F, + 12393 - 11904: 0xC750, + 12394 - 11904: 0xC751, + 12395 - 11904: 0xC752, + 12396 - 11904: 0xC753, + 12397 - 11904: 0xC754, + 12398 - 11904: 0xC755, + 12399 - 11904: 0xC756, + 12400 - 11904: 0xC757, + 12401 - 11904: 0xC758, + 12402 - 11904: 0xC759, + 12403 - 11904: 0xC75A, + 12404 - 11904: 0xC75B, + 12405 - 11904: 0xC75C, + 12406 - 11904: 0xC75D, + 12407 - 11904: 0xC75E, + 12408 - 11904: 0xC75F, + 12409 - 11904: 0xC760, + 12410 - 11904: 0xC761, + 12411 - 11904: 0xC762, + 12412 - 11904: 0xC763, + 12413 - 11904: 0xC764, + 12414 - 11904: 0xC765, + 12415 - 11904: 0xC766, + 12416 - 11904: 0xC767, + 12417 - 11904: 0xC768, + 12418 - 11904: 0xC769, + 12419 - 11904: 0xC76A, + 12420 - 11904: 0xC76B, + 12421 - 11904: 0xC76C, + 12422 - 11904: 0xC76D, + 12423 - 11904: 0xC76E, + 12424 - 11904: 0xC76F, + 12425 - 11904: 0xC770, + 12426 - 11904: 0xC771, + 12427 - 11904: 0xC772, + 12428 - 11904: 0xC773, + 12429 - 11904: 0xC774, + 12430 - 11904: 0xC775, + 12431 - 11904: 0xC776, + 12432 - 11904: 0xC777, + 12433 - 11904: 0xC778, + 12434 - 11904: 0xC779, + 12435 - 11904: 0xC77A, + 12443 - 11904: 0xC8D4, + 12444 - 11904: 0xC8D5, + 12445 - 11904: 0xC6DC, + 12446 - 11904: 0xC6DD, + 12449 - 11904: 0xC77B, + 12450 - 11904: 0xC77C, + 12451 - 11904: 0xC77D, + 12452 - 11904: 0xC77E, + 12453 - 11904: 0xC7A1, + 12454 - 11904: 0xC7A2, + 12455 - 11904: 0xC7A3, + 12456 - 11904: 0xC7A4, + 12457 - 11904: 0xC7A5, + 12458 - 11904: 0xC7A6, + 12459 - 11904: 0xC7A7, + 12460 - 11904: 0xC7A8, + 12461 - 11904: 0xC7A9, + 12462 - 11904: 0xC7AA, + 12463 - 11904: 0xC7AB, + 12464 - 11904: 0xC7AC, + 12465 - 11904: 0xC7AD, + 12466 - 11904: 0xC7AE, + 12467 - 11904: 0xC7AF, + 12468 - 11904: 0xC7B0, + 12469 - 11904: 0xC7B1, + 12470 - 11904: 0xC7B2, + 12471 - 11904: 0xC7B3, + 12472 - 11904: 0xC7B4, + 12473 - 11904: 0xC7B5, + 12474 - 11904: 0xC7B6, + 12475 - 11904: 0xC7B7, + 12476 - 11904: 0xC7B8, + 12477 - 11904: 0xC7B9, + 12478 - 11904: 0xC7BA, + 12479 - 11904: 0xC7BB, + 12480 - 11904: 0xC7BC, + 12481 - 11904: 0xC7BD, + 12482 - 11904: 0xC7BE, + 12483 - 11904: 0xC7BF, + 12484 - 11904: 0xC7C0, + 12485 - 11904: 0xC7C1, + 12486 - 11904: 0xC7C2, + 12487 - 11904: 0xC7C3, + 12488 - 11904: 0xC7C4, + 12489 - 11904: 0xC7C5, + 12490 - 11904: 0xC7C6, + 12491 - 11904: 0xC7C7, + 12492 - 11904: 0xC7C8, + 12493 - 11904: 0xC7C9, + 12494 - 11904: 0xC7CA, + 12495 - 11904: 0xC7CB, + 12496 - 11904: 0xC7CC, + 12497 - 11904: 0xC7CD, + 12498 - 11904: 0xC7CE, + 12499 - 11904: 0xC7CF, + 12500 - 11904: 0xC7D0, + 12501 - 11904: 0xC7D1, + 12502 - 11904: 0xC7D2, + 12503 - 11904: 0xC7D3, + 12504 - 11904: 0xC7D4, + 12505 - 11904: 0xC7D5, + 12506 - 11904: 0xC7D6, + 12507 - 11904: 0xC7D7, + 12508 - 11904: 0xC7D8, + 12509 - 11904: 0xC7D9, + 12510 - 11904: 0xC7DA, + 12511 - 11904: 0xC7DB, + 12512 - 11904: 0xC7DC, + 12513 - 11904: 0xC7DD, + 12514 - 11904: 0xC7DE, + 12515 - 11904: 0xC7DF, + 12516 - 11904: 0xC7E0, + 12517 - 11904: 0xC7E1, + 12518 - 11904: 0xC7E2, + 12519 - 11904: 0xC7E3, + 12520 - 11904: 0xC7E4, + 12521 - 11904: 0xC7E5, + 12522 - 11904: 0xC7E6, + 12523 - 11904: 0xC7E7, + 12524 - 11904: 0xC7E8, + 12525 - 11904: 0xC7E9, + 12526 - 11904: 0xC7EA, + 12527 - 11904: 0xC7EB, + 12528 - 11904: 0xC7EC, + 12529 - 11904: 0xC7ED, + 12530 - 11904: 0xC7EE, + 12531 - 11904: 0xC7EF, + 12532 - 11904: 0xC7F0, + 12533 - 11904: 0xC7F1, + 12534 - 11904: 0xC7F2, + 12540 - 11904: 0xC6E3, + 12541 - 11904: 0xC6DA, + 12542 - 11904: 0xC6DB, + 12549 - 11904: 0xA374, + 12550 - 11904: 0xA375, + 12551 - 11904: 0xA376, + 12552 - 11904: 0xA377, + 12553 - 11904: 0xA378, + 12554 - 11904: 0xA379, + 12555 - 11904: 0xA37A, + 12556 - 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11904: 0xC565, + 40606 - 11904: 0x91AC, + 40607 - 11904: 0xC5EF, + 40608 - 11904: 0xF8E8, + 40609 - 11904: 0xF963, + 40610 - 11904: 0x91AD, + 40612 - 11904: 0xF9D2, + 40613 - 11904: 0xB3C1, + 40614 - 11904: 0xA0FD, + 40615 - 11904: 0xE4E5, + 40616 - 11904: 0x9FE2, + 40617 - 11904: 0xBEA2, + 40618 - 11904: 0x91AF, + 40619 - 11904: 0x9E41, + 40620 - 11904: 0x9AAA, + 40621 - 11904: 0xECB3, + 40622 - 11904: 0xECB2, + 40623 - 11904: 0x91B0, + 40624 - 11904: 0xEFAD, + 40625 - 11904: 0x9AAB, + 40628 - 11904: 0xC454, + 40629 - 11904: 0xC4D1, + 40630 - 11904: 0xF7C7, + 40631 - 11904: 0xF9CB, + 40635 - 11904: 0xB3C2, + 40636 - 11904: 0xBBF2, + 40637 - 11904: 0x9AAC, + 40638 - 11904: 0xBEA3, + 40639 - 11904: 0x9A4A, + 40640 - 11904: 0xF3F4, + 40641 - 11904: 0x91B2, + 40642 - 11904: 0xF874, + 40643 - 11904: 0xB6C0, + 40644 - 11904: 0x8BF6, + 40646 - 11904: 0x9AAD, + 40647 - 11904: 0x89B6, + 40648 - 11904: 0xEFAE, + 40652 - 11904: 0xC664, + 40653 - 11904: 0xB6C1, + 40654 - 11904: 0xBEA4, + 40655 - 11904: 0xC248, + 40656 - 11904: 0xF875, + 40657 - 11904: 0xB6C2, + 40659 - 11904: 0xE8F1, + 40660 - 11904: 0xC072, + 40661 - 11904: 0xECB4, + 40662 - 11904: 0xECB5, + 40664 - 11904: 0xC071, + 40666 - 11904: 0xEFAF, + 40667 - 11904: 0xC24C, + 40668 - 11904: 0xC24A, + 40669 - 11904: 0xC24B, + 40670 - 11904: 0xC249, + 40671 - 11904: 0xF1E0, + 40672 - 11904: 0xC35C, + 40674 - 11904: 0x9AAF, + 40676 - 11904: 0xF5B5, + 40677 - 11904: 0xF5B4, + 40678 - 11904: 0xF5B7, + 40679 - 11904: 0xF5B6, + 40680 - 11904: 0xC4D2, + 40683 - 11904: 0xF6CB, + 40685 - 11904: 0xF6CD, + 40686 - 11904: 0xF6CC, + 40687 - 11904: 0xC566, + 40688 - 11904: 0xF7C8, + 40689 - 11904: 0x9AB0, + 40690 - 11904: 0xF876, + 40691 - 11904: 0xF877, + 40692 - 11904: 0xC5F0, + 40693 - 11904: 0xF964, + 40694 - 11904: 0xF97D, + 40695 - 11904: 0xC675, + 40696 - 11904: 0x9AB1, + 40697 - 11904: 0xDCB0, + 40698 - 11904: 0xECB6, + 40699 - 11904: 0xEFB0, + 40700 - 11904: 0xF3F5, + 40701 - 11904: 0xE0EF, + 40702 - 11904: 0x9AA1, + 40703 - 11904: 0xEFB1, + 40704 - 11904: 0xF1E2, + 40705 - 11904: 0xF1E1, + 40706 - 11904: 0x91B9, + 40710 - 11904: 0xF878, + 40711 - 11904: 0xC652, + 40712 - 11904: 0x91BA, + 40713 - 11904: 0xF965, + 40714 - 11904: 0xF97E, + 40718 - 11904: 0xB9A9, + 40719 - 11904: 0xE8F2, + 40720 - 11904: 0xE8F3, + 40722 - 11904: 0xECB7, + 40723 - 11904: 0xB9AA, + 40725 - 11904: 0xC35D, + 40726 - 11904: 0xF1E3, + 40727 - 11904: 0x9F66, + 40728 - 11904: 0xF6CF, + 40729 - 11904: 0xC567, + 40730 - 11904: 0xF6D0, + 40731 - 11904: 0xF6CE, + 40732 - 11904: 0xF879, + 40734 - 11904: 0xF8E9, + 40736 - 11904: 0xB9AB, + 40738 - 11904: 0xEFB4, + 40739 - 11904: 0xEFB3, + 40740 - 11904: 0xEFB2, + 40741 - 11904: 0xF1E4, + 40742 - 11904: 0xA041, + 40743 - 11904: 0x8BB7, + 40744 - 11904: 0xF1E8, + 40745 - 11904: 0xF1E7, + 40746 - 11904: 0xF1E6, + 40747 - 11904: 0xF1E5, + 40748 - 11904: 0xC35E, + 40749 - 11904: 0xF3F6, + 40750 - 11904: 0xF5B9, + 40751 - 11904: 0xC4D3, + 40752 - 11904: 0xF5B8, + 40753 - 11904: 0xF6D1, + 40754 - 11904: 0xF7CB, + 40755 - 11904: 0xF7CA, + 40756 - 11904: 0xC5C4, + 40757 - 11904: 0xF7C9, + 40758 - 11904: 0xF87C, + 40759 - 11904: 0xF87B, + 40760 - 11904: 0xF87A, + 40761 - 11904: 0x91C0, + 40763 - 11904: 0xBBF3, + 40765 - 11904: 0xECB8, + 40766 - 11904: 0xC24D, + 40768 - 11904: 0xF3F7, + 40769 - 11904: 0xF3F8, + 40770 - 11904: 0xF7CC, + 40771 - 11904: 0xF87D, + 40772 - 11904: 0x9AB3, + 40773 - 11904: 0x91C3, + 40774 - 11904: 0xF8EA, + 40775 - 11904: 0xF966, + 40776 - 11904: 0xF9B9, + 40777 - 11904: 0xF9D4, + 40778 - 11904: 0xBBF4, + 40779 - 11904: 0xC24E, + 40780 - 11904: 0xF1E9, + 40781 - 11904: 0xF3F9, + 40782 - 11904: 0xF6D2, + 40783 - 11904: 0xF87E, + 40784 - 11904: 0xA0FC, + 40786 - 11904: 0xBEA6, + 40787 - 11904: 0x9FEE, + 40788 - 11904: 0xEFB5, + 40789 - 11904: 0xF1EA, + 40790 - 11904: 0xF3FA, + 40791 - 11904: 0xF3FB, + 40792 - 11904: 0xF3FC, + 40793 - 11904: 0xF5BE, + 40794 - 11904: 0x9F69, + 40795 - 11904: 0xF5BA, + 40796 - 11904: 0xC568, + 40797 - 11904: 0xF5BD, + 40798 - 11904: 0xF5BC, + 40799 - 11904: 0xC4D4, + 40800 - 11904: 0xF5BB, + 40801 - 11904: 0xC4D6, + 40802 - 11904: 0x91C8, + 40803 - 11904: 0xC4D5, + 40804 - 11904: 0xF6D4, + 40805 - 11904: 0xF6D3, + 40806 - 11904: 0xC569, + 40807 - 11904: 0xC56A, + 40809 - 11904: 0x91C9, + 40810 - 11904: 0xC5C6, + 40811 - 11904: 0xF7CD, + 40812 - 11904: 0xC5C5, + 40814 - 11904: 0xF8A3, + 40815 - 11904: 0xF8A4, + 40816 - 11904: 0xF8A2, + 40817 - 11904: 0xF8A1, + 40818 - 11904: 0xC654, + 40820 - 11904: 0xF8EB, + 40821 - 11904: 0xF8EC, + 40822 - 11904: 0xF8ED, + 40823 - 11904: 0xC653, + 40824 - 11904: 0xF967, + 40825 - 11904: 0xF96A, + 40826 - 11904: 0xF969, + 40827 - 11904: 0xF968, + 40830 - 11904: 0xF9D3, + 40831 - 11904: 0x8DE6, + 40845 - 11904: 0xC073, + 40846 - 11904: 0x91CB, + 40848 - 11904: 0xC365, + 40849 - 11904: 0xF5BF, + 40850 - 11904: 0xF6D5, + 40852 - 11904: 0xC5C7, + 40853 - 11904: 0xF7CE, + 40854 - 11904: 0x87AC, + 40855 - 11904: 0x87A4, + 40856 - 11904: 0xF9D5, + 40857 - 11904: 0x89C8, + 40860 - 11904: 0xC074, + 40863 - 11904: 0x8DAA, + 40864 - 11904: 0xEFB6, + 40866 - 11904: 0xF7CF, + 40868 - 11904: 0xF9A1, + 40869 - 11904: 0x9FDD, + 40870 - 11904: 0x8C43, + 40871 - 11904: 0x8C6D, + 40872 - 11904: 0x8C74, + 40873 - 11904: 0x8CB7, + 40874 - 11904: 0x8CB9, + 40875 - 11904: 0x8CBB, + 40876 - 11904: 0x8CC0, + 40877 - 11904: 0x8CD7, + 40878 - 11904: 0x8CD8, + 40879 - 11904: 0x8CDA, + 40880 - 11904: 0xC8A1, + 40881 - 11904: 0xC8A3, + 40882 - 11904: 0x8CED, + 40883 - 11904: 0x8D48, + 40903 - 11904: 0x87C2, + 40904 - 11904: 0x87D2, + 40905 - 11904: 0x87D6, + 40906 - 11904: 0x87DA, + 40907 - 11904: 0x87DF, +} + +const encode2Low, encode2High = 7870, 10046 + +var encode2 = [...]uint16{ + 7870 - 7870: 0x8863, + 7871 - 7870: 0x88A4, + 7872 - 7870: 0x8865, + 7873 - 7870: 0x88A6, + 8211 - 7870: 0xA156, + 8212 - 7870: 0xA158, + 8216 - 7870: 0xA1A5, + 8217 - 7870: 0xA1A6, + 8220 - 7870: 0xA1A7, + 8221 - 7870: 0xA1A8, + 8229 - 7870: 0xA14C, + 8230 - 7870: 0xA14B, + 8231 - 7870: 0xA145, + 8242 - 7870: 0xA1AC, + 8245 - 7870: 0xA1AB, + 8251 - 7870: 0xA1B0, + 8364 - 7870: 0xA3E1, + 8451 - 7870: 0xA24A, + 8453 - 7870: 0xA1C1, + 8457 - 7870: 0xA24B, + 8470 - 7870: 0xC8D2, + 8481 - 7870: 0xC8D3, + 8544 - 7870: 0xA2B9, + 8545 - 7870: 0xA2BA, + 8546 - 7870: 0xA2BB, + 8547 - 7870: 0xA2BC, + 8548 - 7870: 0xA2BD, + 8549 - 7870: 0xA2BE, + 8550 - 7870: 0xA2BF, + 8551 - 7870: 0xA2C0, + 8552 - 7870: 0xA2C1, + 8553 - 7870: 0xA2C2, + 8560 - 7870: 0xC6B5, + 8561 - 7870: 0xC6B6, + 8562 - 7870: 0xC6B7, + 8563 - 7870: 0xC6B8, + 8564 - 7870: 0xC6B9, + 8565 - 7870: 0xC6BA, + 8566 - 7870: 0xC6BB, + 8567 - 7870: 0xC6BC, + 8568 - 7870: 0xC6BD, + 8569 - 7870: 0xC6BE, + 8592 - 7870: 0xA1F6, + 8593 - 7870: 0xA1F4, + 8594 - 7870: 0xA1F7, + 8595 - 7870: 0xA1F5, + 8598 - 7870: 0xA1F8, + 8599 - 7870: 0xA1F9, + 8600 - 7870: 0xA1FB, + 8601 - 7870: 0xA1FA, + 8632 - 7870: 0xC877, + 8633 - 7870: 0xC878, + 8679 - 7870: 0xC876, + 8725 - 7870: 0xA241, + 8730 - 7870: 0xA1D4, + 8734 - 7870: 0xA1DB, + 8735 - 7870: 0xA1E8, + 8736 - 7870: 0xA1E7, + 8739 - 7870: 0xA1FD, + 8741 - 7870: 0xA1FC, + 8745 - 7870: 0xA1E4, + 8746 - 7870: 0xA1E5, + 8747 - 7870: 0xA1EC, + 8750 - 7870: 0xA1ED, + 8756 - 7870: 0xA1EF, + 8757 - 7870: 0xA1EE, + 8786 - 7870: 0xA1DC, + 8800 - 7870: 0xA1DA, + 8801 - 7870: 0xA1DD, + 8806 - 7870: 0xA1D8, + 8807 - 7870: 0xA1D9, + 8853 - 7870: 0xA1F2, + 8857 - 7870: 0xA1F3, + 8869 - 7870: 0xA1E6, + 8895 - 7870: 0xA1E9, + 9178 - 7870: 0x88A9, + 9179 - 7870: 0x88AA, + 9216 - 7870: 0xA3C0, + 9217 - 7870: 0xA3C1, + 9218 - 7870: 0xA3C2, + 9219 - 7870: 0xA3C3, + 9220 - 7870: 0xA3C4, + 9221 - 7870: 0xA3C5, + 9222 - 7870: 0xA3C6, + 9223 - 7870: 0xA3C7, + 9224 - 7870: 0xA3C8, + 9225 - 7870: 0xA3C9, + 9226 - 7870: 0xA3CA, + 9227 - 7870: 0xA3CB, + 9228 - 7870: 0xA3CC, + 9229 - 7870: 0xA3CD, + 9230 - 7870: 0xA3CE, + 9231 - 7870: 0xA3CF, + 9232 - 7870: 0xA3D0, + 9233 - 7870: 0xA3D1, + 9234 - 7870: 0xA3D2, + 9235 - 7870: 0xA3D3, + 9236 - 7870: 0xA3D4, + 9237 - 7870: 0xA3D5, + 9238 - 7870: 0xA3D6, + 9239 - 7870: 0xA3D7, + 9240 - 7870: 0xA3D8, + 9241 - 7870: 0xA3D9, + 9242 - 7870: 0xA3DA, + 9243 - 7870: 0xA3DB, + 9244 - 7870: 0xA3DC, + 9245 - 7870: 0xA3DD, + 9246 - 7870: 0xA3DE, + 9247 - 7870: 0xA3DF, + 9249 - 7870: 0xA3E0, + 9312 - 7870: 0xC6A1, + 9313 - 7870: 0xC6A2, + 9314 - 7870: 0xC6A3, + 9315 - 7870: 0xC6A4, + 9316 - 7870: 0xC6A5, + 9317 - 7870: 0xC6A6, + 9318 - 7870: 0xC6A7, + 9319 - 7870: 0xC6A8, + 9320 - 7870: 0xC6A9, + 9321 - 7870: 0xC6AA, + 9332 - 7870: 0xC6AB, + 9333 - 7870: 0xC6AC, + 9334 - 7870: 0xC6AD, + 9335 - 7870: 0xC6AE, + 9336 - 7870: 0xC6AF, + 9337 - 7870: 0xC6B0, + 9338 - 7870: 0xC6B1, + 9339 - 7870: 0xC6B2, + 9340 - 7870: 0xC6B3, + 9341 - 7870: 0xC6B4, + 9472 - 7870: 0xA277, + 9474 - 7870: 0xA278, + 9484 - 7870: 0xA27A, + 9488 - 7870: 0xA27B, + 9492 - 7870: 0xA27C, + 9496 - 7870: 0xA27D, + 9500 - 7870: 0xA275, + 9508 - 7870: 0xA274, + 9516 - 7870: 0xA273, + 9524 - 7870: 0xA272, + 9532 - 7870: 0xA271, + 9552 - 7870: 0xF9F9, + 9553 - 7870: 0xF9F8, + 9554 - 7870: 0xF9E6, + 9555 - 7870: 0xF9EF, + 9556 - 7870: 0xF9DD, + 9557 - 7870: 0xF9E8, + 9558 - 7870: 0xF9F1, + 9559 - 7870: 0xF9DF, + 9560 - 7870: 0xF9EC, + 9561 - 7870: 0xF9F5, + 9562 - 7870: 0xF9E3, + 9563 - 7870: 0xF9EE, + 9564 - 7870: 0xF9F7, + 9565 - 7870: 0xF9E5, + 9566 - 7870: 0xF9E9, + 9567 - 7870: 0xF9F2, + 9568 - 7870: 0xF9E0, + 9569 - 7870: 0xF9EB, + 9570 - 7870: 0xF9F4, + 9571 - 7870: 0xF9E2, + 9572 - 7870: 0xF9E7, + 9573 - 7870: 0xF9F0, + 9574 - 7870: 0xF9DE, + 9575 - 7870: 0xF9ED, + 9576 - 7870: 0xF9F6, + 9577 - 7870: 0xF9E4, + 9578 - 7870: 0xF9EA, + 9579 - 7870: 0xF9F3, + 9580 - 7870: 0xF9E1, + 9581 - 7870: 0xF9FA, + 9582 - 7870: 0xF9FB, + 9583 - 7870: 0xF9FD, + 9584 - 7870: 0xF9FC, + 9585 - 7870: 0xA2AC, + 9586 - 7870: 0xA2AD, + 9587 - 7870: 0xA2AE, + 9588 - 7870: 0xA15A, + 9601 - 7870: 0xA262, + 9602 - 7870: 0xA263, + 9603 - 7870: 0xA264, + 9604 - 7870: 0xA265, + 9605 - 7870: 0xA266, + 9606 - 7870: 0xA267, + 9607 - 7870: 0xA268, + 9608 - 7870: 0xA269, + 9609 - 7870: 0xA270, + 9610 - 7870: 0xA26F, + 9611 - 7870: 0xA26E, + 9612 - 7870: 0xA26D, + 9613 - 7870: 0xA26C, + 9614 - 7870: 0xA26B, + 9615 - 7870: 0xA26A, + 9620 - 7870: 0xA276, + 9621 - 7870: 0xA279, + 9632 - 7870: 0xA1BD, + 9633 - 7870: 0xA1BC, + 9650 - 7870: 0xA1B6, + 9651 - 7870: 0xA1B5, + 9660 - 7870: 0xA1BF, + 9661 - 7870: 0xA1BE, + 9670 - 7870: 0xA1BB, + 9671 - 7870: 0xA1BA, + 9675 - 7870: 0xA1B3, + 9678 - 7870: 0xA1B7, + 9679 - 7870: 0xA1B4, + 9698 - 7870: 0xA2A8, + 9699 - 7870: 0xA2A9, + 9700 - 7870: 0xA2AB, + 9701 - 7870: 0xA2AA, + 9733 - 7870: 0xA1B9, + 9734 - 7870: 0xA1B8, + 9792 - 7870: 0xA1F0, + 9794 - 7870: 0xA1F1, + 10045 - 7870: 0xC6E6, +} + +const encode3Low, encode3High = 167, 1106 + +var encode3 = [...]uint16{ + 167 - 167: 0xA1B1, + 168 - 167: 0xC6D8, + 175 - 167: 0xA1C2, + 176 - 167: 0xA258, + 177 - 167: 0xA1D3, + 183 - 167: 0xA150, + 192 - 167: 0x8859, + 193 - 167: 0x8857, + 200 - 167: 0x885D, + 201 - 167: 0x885B, + 202 - 167: 0x8866, + 210 - 167: 0x8861, + 211 - 167: 0x885F, + 215 - 167: 0xA1D1, + 224 - 167: 0x886A, + 225 - 167: 0x8868, + 232 - 167: 0x886F, + 233 - 167: 0x886D, + 234 - 167: 0x88A7, + 236 - 167: 0x8873, + 237 - 167: 0x8871, + 242 - 167: 0x8877, + 243 - 167: 0x8875, + 247 - 167: 0xA1D2, + 248 - 167: 0xC8FB, + 249 - 167: 0x887B, + 250 - 167: 0x8879, + 252 - 167: 0x88A2, + 256 - 167: 0x8856, + 257 - 167: 0x8867, + 274 - 167: 0x885A, + 275 - 167: 0x886C, + 282 - 167: 0x885C, + 283 - 167: 0x886E, + 299 - 167: 0x8870, + 331 - 167: 0xC8FC, + 332 - 167: 0x885E, + 333 - 167: 0x8874, + 339 - 167: 0xC8FA, + 363 - 167: 0x8878, + 461 - 167: 0x8858, + 462 - 167: 0x8869, + 464 - 167: 0x8872, + 465 - 167: 0x8860, + 466 - 167: 0x8876, + 468 - 167: 0x887A, + 470 - 167: 0x887C, + 472 - 167: 0x887D, + 474 - 167: 0x887E, + 476 - 167: 0x88A1, + 592 - 167: 0xC8F6, + 593 - 167: 0x886B, + 596 - 167: 0xC8F8, + 603 - 167: 0xC8F7, + 609 - 167: 0x88A8, + 618 - 167: 0xC8FE, + 629 - 167: 0xC8F9, + 643 - 167: 0xC8F5, + 650 - 167: 0xC8FD, + 710 - 167: 0xC6D9, + 711 - 167: 0xA3BE, + 713 - 167: 0xA3BC, + 714 - 167: 0xA3BD, + 715 - 167: 0xA3BF, + 717 - 167: 0xA1C5, + 729 - 167: 0xA3BB, + 913 - 167: 0xA344, + 914 - 167: 0xA345, + 915 - 167: 0xA346, + 916 - 167: 0xA347, + 917 - 167: 0xA348, + 918 - 167: 0xA349, + 919 - 167: 0xA34A, + 920 - 167: 0xA34B, + 921 - 167: 0xA34C, + 922 - 167: 0xA34D, + 923 - 167: 0xA34E, + 924 - 167: 0xA34F, + 925 - 167: 0xA350, + 926 - 167: 0xA351, + 927 - 167: 0xA352, + 928 - 167: 0xA353, + 929 - 167: 0xA354, + 931 - 167: 0xA355, + 932 - 167: 0xA356, + 933 - 167: 0xA357, + 934 - 167: 0xA358, + 935 - 167: 0xA359, + 936 - 167: 0xA35A, + 937 - 167: 0xA35B, + 945 - 167: 0xA35C, + 946 - 167: 0xA35D, + 947 - 167: 0xA35E, + 948 - 167: 0xA35F, + 949 - 167: 0xA360, + 950 - 167: 0xA361, + 951 - 167: 0xA362, + 952 - 167: 0xA363, + 953 - 167: 0xA364, + 954 - 167: 0xA365, + 955 - 167: 0xA366, + 956 - 167: 0xA367, + 957 - 167: 0xA368, + 958 - 167: 0xA369, + 959 - 167: 0xA36A, + 960 - 167: 0xA36B, + 961 - 167: 0xA36C, + 963 - 167: 0xA36D, + 964 - 167: 0xA36E, + 965 - 167: 0xA36F, + 966 - 167: 0xA370, + 967 - 167: 0xA371, + 968 - 167: 0xA372, + 969 - 167: 0xA373, + 1025 - 167: 0xC7F9, + 1040 - 167: 0xC7F3, + 1041 - 167: 0xC7F4, + 1042 - 167: 0xC7F5, + 1043 - 167: 0xC7F6, + 1044 - 167: 0xC7F7, + 1045 - 167: 0xC7F8, + 1046 - 167: 0xC7FA, + 1047 - 167: 0xC7FB, + 1048 - 167: 0xC7FC, + 1049 - 167: 0xC7FD, + 1050 - 167: 0xC7FE, + 1051 - 167: 0xC840, + 1052 - 167: 0xC841, + 1053 - 167: 0xC842, + 1054 - 167: 0xC843, + 1055 - 167: 0xC844, + 1056 - 167: 0xC845, + 1057 - 167: 0xC846, + 1058 - 167: 0xC847, + 1059 - 167: 0xC848, + 1060 - 167: 0xC849, + 1061 - 167: 0xC84A, + 1062 - 167: 0xC84B, + 1063 - 167: 0xC84C, + 1064 - 167: 0xC84D, + 1065 - 167: 0xC84E, + 1066 - 167: 0xC84F, + 1067 - 167: 0xC850, + 1068 - 167: 0xC851, + 1069 - 167: 0xC852, + 1070 - 167: 0xC853, + 1071 - 167: 0xC854, + 1072 - 167: 0xC855, + 1073 - 167: 0xC856, + 1074 - 167: 0xC857, + 1075 - 167: 0xC858, + 1076 - 167: 0xC859, + 1077 - 167: 0xC85A, + 1078 - 167: 0xC85C, + 1079 - 167: 0xC85D, + 1080 - 167: 0xC85E, + 1081 - 167: 0xC85F, + 1082 - 167: 0xC860, + 1083 - 167: 0xC861, + 1084 - 167: 0xC862, + 1085 - 167: 0xC863, + 1086 - 167: 0xC864, + 1087 - 167: 0xC865, + 1088 - 167: 0xC866, + 1089 - 167: 0xC867, + 1090 - 167: 0xC868, + 1091 - 167: 0xC869, + 1092 - 167: 0xC86A, + 1093 - 167: 0xC86B, + 1094 - 167: 0xC86C, + 1095 - 167: 0xC86D, + 1096 - 167: 0xC86E, + 1097 - 167: 0xC86F, + 1098 - 167: 0xC870, + 1099 - 167: 0xC871, + 1100 - 167: 0xC872, + 1101 - 167: 0xC873, + 1102 - 167: 0xC874, + 1103 - 167: 0xC875, + 1105 - 167: 0xC85B, +} + +const encode4Low, encode4High = 65072, 65518 + +var encode4 = [...]uint16{ + 65072 - 65072: 0xA14A, + 65073 - 65072: 0xA157, + 65075 - 65072: 0xA159, + 65076 - 65072: 0xA15B, + 65077 - 65072: 0xA15F, + 65078 - 65072: 0xA160, + 65079 - 65072: 0xA163, + 65080 - 65072: 0xA164, + 65081 - 65072: 0xA167, + 65082 - 65072: 0xA168, + 65083 - 65072: 0xA16B, + 65084 - 65072: 0xA16C, + 65085 - 65072: 0xA16F, + 65086 - 65072: 0xA170, + 65087 - 65072: 0xA173, + 65088 - 65072: 0xA174, + 65089 - 65072: 0xA177, + 65090 - 65072: 0xA178, + 65091 - 65072: 0xA17B, + 65092 - 65072: 0xA17C, + 65097 - 65072: 0xA1C6, + 65098 - 65072: 0xA1C7, + 65099 - 65072: 0xA1CA, + 65100 - 65072: 0xA1CB, + 65101 - 65072: 0xA1C8, + 65102 - 65072: 0xA1C9, + 65103 - 65072: 0xA15C, + 65104 - 65072: 0xA14D, + 65105 - 65072: 0xA14E, + 65106 - 65072: 0xA14F, + 65108 - 65072: 0xA151, + 65109 - 65072: 0xA152, + 65110 - 65072: 0xA153, + 65111 - 65072: 0xA154, + 65113 - 65072: 0xA17D, + 65114 - 65072: 0xA17E, + 65115 - 65072: 0xA1A1, + 65116 - 65072: 0xA1A2, + 65117 - 65072: 0xA1A3, + 65118 - 65072: 0xA1A4, + 65119 - 65072: 0xA1CC, + 65120 - 65072: 0xA1CD, + 65121 - 65072: 0xA1CE, + 65122 - 65072: 0xA1DE, + 65123 - 65072: 0xA1DF, + 65124 - 65072: 0xA1E0, + 65125 - 65072: 0xA1E1, + 65126 - 65072: 0xA1E2, + 65128 - 65072: 0xA242, + 65129 - 65072: 0xA24C, + 65130 - 65072: 0xA24D, + 65131 - 65072: 0xA24E, + 65281 - 65072: 0xA149, + 65282 - 65072: 0xC8D0, + 65283 - 65072: 0xA1AD, + 65284 - 65072: 0xA243, + 65285 - 65072: 0xA248, + 65286 - 65072: 0xA1AE, + 65287 - 65072: 0xC8CF, + 65288 - 65072: 0xA15D, + 65289 - 65072: 0xA15E, + 65290 - 65072: 0xA1AF, + 65291 - 65072: 0xA1CF, + 65292 - 65072: 0xA141, + 65293 - 65072: 0xA1D0, + 65294 - 65072: 0xA144, + 65295 - 65072: 0xA1FE, + 65296 - 65072: 0xA2AF, + 65297 - 65072: 0xA2B0, + 65298 - 65072: 0xA2B1, + 65299 - 65072: 0xA2B2, + 65300 - 65072: 0xA2B3, + 65301 - 65072: 0xA2B4, + 65302 - 65072: 0xA2B5, + 65303 - 65072: 0xA2B6, + 65304 - 65072: 0xA2B7, + 65305 - 65072: 0xA2B8, + 65306 - 65072: 0xA147, + 65307 - 65072: 0xA146, + 65308 - 65072: 0xA1D5, + 65309 - 65072: 0xA1D7, + 65310 - 65072: 0xA1D6, + 65311 - 65072: 0xA148, + 65312 - 65072: 0xA249, + 65313 - 65072: 0xA2CF, + 65314 - 65072: 0xA2D0, + 65315 - 65072: 0xA2D1, + 65316 - 65072: 0xA2D2, + 65317 - 65072: 0xA2D3, + 65318 - 65072: 0xA2D4, + 65319 - 65072: 0xA2D5, + 65320 - 65072: 0xA2D6, + 65321 - 65072: 0xA2D7, + 65322 - 65072: 0xA2D8, + 65323 - 65072: 0xA2D9, + 65324 - 65072: 0xA2DA, + 65325 - 65072: 0xA2DB, + 65326 - 65072: 0xA2DC, + 65327 - 65072: 0xA2DD, + 65328 - 65072: 0xA2DE, + 65329 - 65072: 0xA2DF, + 65330 - 65072: 0xA2E0, + 65331 - 65072: 0xA2E1, + 65332 - 65072: 0xA2E2, + 65333 - 65072: 0xA2E3, + 65334 - 65072: 0xA2E4, + 65335 - 65072: 0xA2E5, + 65336 - 65072: 0xA2E6, + 65337 - 65072: 0xA2E7, + 65338 - 65072: 0xA2E8, + 65339 - 65072: 0xC6E4, + 65340 - 65072: 0xA240, + 65341 - 65072: 0xC6E5, + 65343 - 65072: 0xA1C4, + 65345 - 65072: 0xA2E9, + 65346 - 65072: 0xA2EA, + 65347 - 65072: 0xA2EB, + 65348 - 65072: 0xA2EC, + 65349 - 65072: 0xA2ED, + 65350 - 65072: 0xA2EE, + 65351 - 65072: 0xA2EF, + 65352 - 65072: 0xA2F0, + 65353 - 65072: 0xA2F1, + 65354 - 65072: 0xA2F2, + 65355 - 65072: 0xA2F3, + 65356 - 65072: 0xA2F4, + 65357 - 65072: 0xA2F5, + 65358 - 65072: 0xA2F6, + 65359 - 65072: 0xA2F7, + 65360 - 65072: 0xA2F8, + 65361 - 65072: 0xA2F9, + 65362 - 65072: 0xA2FA, + 65363 - 65072: 0xA2FB, + 65364 - 65072: 0xA2FC, + 65365 - 65072: 0xA2FD, + 65366 - 65072: 0xA2FE, + 65367 - 65072: 0xA340, + 65368 - 65072: 0xA341, + 65369 - 65072: 0xA342, + 65370 - 65072: 0xA343, + 65371 - 65072: 0xA161, + 65372 - 65072: 0xA155, + 65373 - 65072: 0xA162, + 65374 - 65072: 0xA1E3, + 65504 - 65072: 0xA246, + 65505 - 65072: 0xA247, + 65506 - 65072: 0xC8CD, + 65507 - 65072: 0xA1C3, + 65508 - 65072: 0xC8CE, + 65509 - 65072: 0xA244, + 65517 - 65072: 0xF9FE, +} + +const encode5Low, encode5High = 194597, 195029 + +var encode5 = [...]uint16{ + 194597 - 194597: 0x9874, + 194619 - 194597: 0x9AC8, + 194624 - 194597: 0xA047, + 194680 - 194597: 0x8BC3, + 194708 - 194597: 0xFC48, + 194726 - 194597: 0xFC77, + 194765 - 194597: 0x9C52, + 194964 - 194597: 0x8EFD, + 194994 - 194597: 0x8FA8, + 195004 - 194597: 0x957A, + 195028 - 194597: 0x8FF0, +} + +const encode6Low, encode6High = 63751, 64014 + +var encode6 = [...]uint16{ + 63751 - 63751: 0x8BF8, + 64012 - 63751: 0xC94A, + 64013 - 63751: 0xDDFC, +} + +const encode7Low, encode7High = 175615, 175616 + +var encode7 = [...]uint16{ + 175615 - 175615: 0x87DC, +} diff --git a/backend/vendor/golang.org/x/text/encoding/unicode/override.go b/backend/vendor/golang.org/x/text/encoding/unicode/override.go new file mode 100644 index 0000000..35d62fc --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/unicode/override.go @@ -0,0 +1,82 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package unicode + +import ( + "golang.org/x/text/transform" +) + +// BOMOverride returns a new decoder transformer that is identical to fallback, +// except that the presence of a Byte Order Mark at the start of the input +// causes it to switch to the corresponding Unicode decoding. It will only +// consider BOMs for UTF-8, UTF-16BE, and UTF-16LE. +// +// This differs from using ExpectBOM by allowing a BOM to switch to UTF-8, not +// just UTF-16 variants, and allowing falling back to any encoding scheme. +// +// This technique is recommended by the W3C for use in HTML 5: "For +// compatibility with deployed content, the byte order mark (also known as BOM) +// is considered more authoritative than anything else." +// http://www.w3.org/TR/encoding/#specification-hooks +// +// Using BOMOverride is mostly intended for use cases where the first characters +// of a fallback encoding are known to not be a BOM, for example, for valid HTML +// and most encodings. +func BOMOverride(fallback transform.Transformer) transform.Transformer { + // TODO: possibly allow a variadic argument of unicode encodings to allow + // specifying details of which fallbacks are supported as well as + // specifying the details of the implementations. This would also allow for + // support for UTF-32, which should not be supported by default. + return &bomOverride{fallback: fallback} +} + +type bomOverride struct { + fallback transform.Transformer + current transform.Transformer +} + +func (d *bomOverride) Reset() { + d.current = nil + d.fallback.Reset() +} + +var ( + // TODO: we could use decode functions here, instead of allocating a new + // decoder on every NewDecoder as IgnoreBOM decoders can be stateless. + utf16le = UTF16(LittleEndian, IgnoreBOM) + utf16be = UTF16(BigEndian, IgnoreBOM) +) + +const utf8BOM = "\ufeff" + +func (d *bomOverride) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + if d.current != nil { + return d.current.Transform(dst, src, atEOF) + } + if len(src) < 3 && !atEOF { + return 0, 0, transform.ErrShortSrc + } + d.current = d.fallback + bomSize := 0 + if len(src) >= 2 { + if src[0] == 0xFF && src[1] == 0xFE { + d.current = utf16le.NewDecoder() + bomSize = 2 + } else if src[0] == 0xFE && src[1] == 0xFF { + d.current = utf16be.NewDecoder() + bomSize = 2 + } else if len(src) >= 3 && + src[0] == utf8BOM[0] && + src[1] == utf8BOM[1] && + src[2] == utf8BOM[2] { + d.current = transform.Nop + bomSize = 3 + } + } + if bomSize < len(src) { + nDst, nSrc, err = d.current.Transform(dst, src[bomSize:], atEOF) + } + return nDst, nSrc + bomSize, err +} diff --git a/backend/vendor/golang.org/x/text/encoding/unicode/unicode.go b/backend/vendor/golang.org/x/text/encoding/unicode/unicode.go new file mode 100644 index 0000000..dd99ad1 --- /dev/null +++ b/backend/vendor/golang.org/x/text/encoding/unicode/unicode.go @@ -0,0 +1,512 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package unicode provides Unicode encodings such as UTF-16. +package unicode // import "golang.org/x/text/encoding/unicode" + +import ( + "bytes" + "errors" + "unicode/utf16" + "unicode/utf8" + + "golang.org/x/text/encoding" + "golang.org/x/text/encoding/internal" + "golang.org/x/text/encoding/internal/identifier" + "golang.org/x/text/internal/utf8internal" + "golang.org/x/text/runes" + "golang.org/x/text/transform" +) + +// TODO: I think the Transformers really should return errors on unmatched +// surrogate pairs and odd numbers of bytes. This is not required by RFC 2781, +// which leaves it open, but is suggested by WhatWG. It will allow for all error +// modes as defined by WhatWG: fatal, HTML and Replacement. This would require +// the introduction of some kind of error type for conveying the erroneous code +// point. + +// UTF8 is the UTF-8 encoding. It neither removes nor adds byte order marks. +var UTF8 encoding.Encoding = utf8enc + +// UTF8BOM is an UTF-8 encoding where the decoder strips a leading byte order +// mark while the encoder adds one. +// +// Some editors add a byte order mark as a signature to UTF-8 files. Although +// the byte order mark is not useful for detecting byte order in UTF-8, it is +// sometimes used as a convention to mark UTF-8-encoded files. This relies on +// the observation that the UTF-8 byte order mark is either an illegal or at +// least very unlikely sequence in any other character encoding. +var UTF8BOM encoding.Encoding = utf8bomEncoding{} + +type utf8bomEncoding struct{} + +func (utf8bomEncoding) String() string { + return "UTF-8-BOM" +} + +func (utf8bomEncoding) ID() (identifier.MIB, string) { + return identifier.Unofficial, "x-utf8bom" +} + +func (utf8bomEncoding) NewEncoder() *encoding.Encoder { + return &encoding.Encoder{ + Transformer: &utf8bomEncoder{t: runes.ReplaceIllFormed()}, + } +} + +func (utf8bomEncoding) NewDecoder() *encoding.Decoder { + return &encoding.Decoder{Transformer: &utf8bomDecoder{}} +} + +var utf8enc = &internal.Encoding{ + &internal.SimpleEncoding{utf8Decoder{}, runes.ReplaceIllFormed()}, + "UTF-8", + identifier.UTF8, +} + +type utf8bomDecoder struct { + checked bool +} + +func (t *utf8bomDecoder) Reset() { + t.checked = false +} + +func (t *utf8bomDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + if !t.checked { + if !atEOF && len(src) < len(utf8BOM) { + if len(src) == 0 { + return 0, 0, nil + } + return 0, 0, transform.ErrShortSrc + } + if bytes.HasPrefix(src, []byte(utf8BOM)) { + nSrc += len(utf8BOM) + src = src[len(utf8BOM):] + } + t.checked = true + } + nDst, n, err := utf8Decoder.Transform(utf8Decoder{}, dst[nDst:], src, atEOF) + nSrc += n + return nDst, nSrc, err +} + +type utf8bomEncoder struct { + written bool + t transform.Transformer +} + +func (t *utf8bomEncoder) Reset() { + t.written = false + t.t.Reset() +} + +func (t *utf8bomEncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + if !t.written { + if len(dst) < len(utf8BOM) { + return nDst, 0, transform.ErrShortDst + } + nDst = copy(dst, utf8BOM) + t.written = true + } + n, nSrc, err := utf8Decoder.Transform(utf8Decoder{}, dst[nDst:], src, atEOF) + nDst += n + return nDst, nSrc, err +} + +type utf8Decoder struct{ transform.NopResetter } + +func (utf8Decoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + var pSrc int // point from which to start copy in src + var accept utf8internal.AcceptRange + + // The decoder can only make the input larger, not smaller. + n := len(src) + if len(dst) < n { + err = transform.ErrShortDst + n = len(dst) + atEOF = false + } + for nSrc < n { + c := src[nSrc] + if c < utf8.RuneSelf { + nSrc++ + continue + } + first := utf8internal.First[c] + size := int(first & utf8internal.SizeMask) + if first == utf8internal.FirstInvalid { + goto handleInvalid // invalid starter byte + } + accept = utf8internal.AcceptRanges[first>>utf8internal.AcceptShift] + if nSrc+size > n { + if !atEOF { + // We may stop earlier than necessary here if the short sequence + // has invalid bytes. Not checking for this simplifies the code + // and may avoid duplicate computations in certain conditions. + if err == nil { + err = transform.ErrShortSrc + } + break + } + // Determine the maximal subpart of an ill-formed subsequence. + switch { + case nSrc+1 >= n || src[nSrc+1] < accept.Lo || accept.Hi < src[nSrc+1]: + size = 1 + case nSrc+2 >= n || src[nSrc+2] < utf8internal.LoCB || utf8internal.HiCB < src[nSrc+2]: + size = 2 + default: + size = 3 // As we are short, the maximum is 3. + } + goto handleInvalid + } + if c = src[nSrc+1]; c < accept.Lo || accept.Hi < c { + size = 1 + goto handleInvalid // invalid continuation byte + } else if size == 2 { + } else if c = src[nSrc+2]; c < utf8internal.LoCB || utf8internal.HiCB < c { + size = 2 + goto handleInvalid // invalid continuation byte + } else if size == 3 { + } else if c = src[nSrc+3]; c < utf8internal.LoCB || utf8internal.HiCB < c { + size = 3 + goto handleInvalid // invalid continuation byte + } + nSrc += size + continue + + handleInvalid: + // Copy the scanned input so far. + nDst += copy(dst[nDst:], src[pSrc:nSrc]) + + // Append RuneError to the destination. + const runeError = "\ufffd" + if nDst+len(runeError) > len(dst) { + return nDst, nSrc, transform.ErrShortDst + } + nDst += copy(dst[nDst:], runeError) + + // Skip the maximal subpart of an ill-formed subsequence according to + // the W3C standard way instead of the Go way. This Transform is + // probably the only place in the text repo where it is warranted. + nSrc += size + pSrc = nSrc + + // Recompute the maximum source length. + if sz := len(dst) - nDst; sz < len(src)-nSrc { + err = transform.ErrShortDst + n = nSrc + sz + atEOF = false + } + } + return nDst + copy(dst[nDst:], src[pSrc:nSrc]), nSrc, err +} + +// UTF16 returns a UTF-16 Encoding for the given default endianness and byte +// order mark (BOM) policy. +// +// When decoding from UTF-16 to UTF-8, if the BOMPolicy is IgnoreBOM then +// neither BOMs U+FEFF nor noncharacters U+FFFE in the input stream will affect +// the endianness used for decoding, and will instead be output as their +// standard UTF-8 encodings: "\xef\xbb\xbf" and "\xef\xbf\xbe". If the BOMPolicy +// is UseBOM or ExpectBOM a staring BOM is not written to the UTF-8 output. +// Instead, it overrides the default endianness e for the remainder of the +// transformation. Any subsequent BOMs U+FEFF or noncharacters U+FFFE will not +// affect the endianness used, and will instead be output as their standard +// UTF-8 encodings. For UseBOM, if there is no starting BOM, it will proceed +// with the default Endianness. For ExpectBOM, in that case, the transformation +// will return early with an ErrMissingBOM error. +// +// When encoding from UTF-8 to UTF-16, a BOM will be inserted at the start of +// the output if the BOMPolicy is UseBOM or ExpectBOM. Otherwise, a BOM will not +// be inserted. The UTF-8 input does not need to contain a BOM. +// +// There is no concept of a 'native' endianness. If the UTF-16 data is produced +// and consumed in a greater context that implies a certain endianness, use +// IgnoreBOM. Otherwise, use ExpectBOM and always produce and consume a BOM. +// +// In the language of https://www.unicode.org/faq/utf_bom.html#bom10, IgnoreBOM +// corresponds to "Where the precise type of the data stream is known... the +// BOM should not be used" and ExpectBOM corresponds to "A particular +// protocol... may require use of the BOM". +func UTF16(e Endianness, b BOMPolicy) encoding.Encoding { + return utf16Encoding{config{e, b}, mibValue[e][b&bomMask]} +} + +// mibValue maps Endianness and BOMPolicy settings to MIB constants. Note that +// some configurations map to the same MIB identifier. RFC 2781 has requirements +// and recommendations. Some of the "configurations" are merely recommendations, +// so multiple configurations could match. +var mibValue = map[Endianness][numBOMValues]identifier.MIB{ + BigEndian: [numBOMValues]identifier.MIB{ + IgnoreBOM: identifier.UTF16BE, + UseBOM: identifier.UTF16, // BigEnding default is preferred by RFC 2781. + // TODO: acceptBOM | strictBOM would map to UTF16BE as well. + }, + LittleEndian: [numBOMValues]identifier.MIB{ + IgnoreBOM: identifier.UTF16LE, + UseBOM: identifier.UTF16, // LittleEndian default is allowed and preferred on Windows. + // TODO: acceptBOM | strictBOM would map to UTF16LE as well. + }, + // ExpectBOM is not widely used and has no valid MIB identifier. +} + +// All lists a configuration for each IANA-defined UTF-16 variant. +var All = []encoding.Encoding{ + UTF8, + UTF16(BigEndian, UseBOM), + UTF16(BigEndian, IgnoreBOM), + UTF16(LittleEndian, IgnoreBOM), +} + +// BOMPolicy is a UTF-16 encoding's byte order mark policy. +type BOMPolicy uint8 + +const ( + writeBOM BOMPolicy = 0x01 + acceptBOM BOMPolicy = 0x02 + requireBOM BOMPolicy = 0x04 + bomMask BOMPolicy = 0x07 + + // HACK: numBOMValues == 8 triggers a bug in the 1.4 compiler (cannot have a + // map of an array of length 8 of a type that is also used as a key or value + // in another map). See golang.org/issue/11354. + // TODO: consider changing this value back to 8 if the use of 1.4.* has + // been minimized. + numBOMValues = 8 + 1 + + // IgnoreBOM means to ignore any byte order marks. + IgnoreBOM BOMPolicy = 0 + // Common and RFC 2781-compliant interpretation for UTF-16BE/LE. + + // UseBOM means that the UTF-16 form may start with a byte order mark, which + // will be used to override the default encoding. + UseBOM BOMPolicy = writeBOM | acceptBOM + // Common and RFC 2781-compliant interpretation for UTF-16. + + // ExpectBOM means that the UTF-16 form must start with a byte order mark, + // which will be used to override the default encoding. + ExpectBOM BOMPolicy = writeBOM | acceptBOM | requireBOM + // Used in Java as Unicode (not to be confused with Java's UTF-16) and + // ICU's UTF-16,version=1. Not compliant with RFC 2781. + + // TODO (maybe): strictBOM: BOM must match Endianness. This would allow: + // - UTF-16(B|L)E,version=1: writeBOM | acceptBOM | requireBOM | strictBOM + // (UnicodeBig and UnicodeLittle in Java) + // - RFC 2781-compliant, but less common interpretation for UTF-16(B|L)E: + // acceptBOM | strictBOM (e.g. assigned to CheckBOM). + // This addition would be consistent with supporting ExpectBOM. +) + +// Endianness is a UTF-16 encoding's default endianness. +type Endianness bool + +const ( + // BigEndian is UTF-16BE. + BigEndian Endianness = false + // LittleEndian is UTF-16LE. + LittleEndian Endianness = true +) + +// ErrMissingBOM means that decoding UTF-16 input with ExpectBOM did not find a +// starting byte order mark. +var ErrMissingBOM = errors.New("encoding: missing byte order mark") + +type utf16Encoding struct { + config + mib identifier.MIB +} + +type config struct { + endianness Endianness + bomPolicy BOMPolicy +} + +func (u utf16Encoding) NewDecoder() *encoding.Decoder { + return &encoding.Decoder{Transformer: &utf16Decoder{ + initial: u.config, + current: u.config, + }} +} + +func (u utf16Encoding) NewEncoder() *encoding.Encoder { + return &encoding.Encoder{Transformer: &utf16Encoder{ + endianness: u.endianness, + initialBOMPolicy: u.bomPolicy, + currentBOMPolicy: u.bomPolicy, + }} +} + +func (u utf16Encoding) ID() (mib identifier.MIB, other string) { + return u.mib, "" +} + +func (u utf16Encoding) String() string { + e, b := "B", "" + if u.endianness == LittleEndian { + e = "L" + } + switch u.bomPolicy { + case ExpectBOM: + b = "Expect" + case UseBOM: + b = "Use" + case IgnoreBOM: + b = "Ignore" + } + return "UTF-16" + e + "E (" + b + " BOM)" +} + +type utf16Decoder struct { + initial config + current config +} + +func (u *utf16Decoder) Reset() { + u.current = u.initial +} + +func (u *utf16Decoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + if len(src) < 2 && atEOF && u.current.bomPolicy&requireBOM != 0 { + return 0, 0, ErrMissingBOM + } + if len(src) == 0 { + return 0, 0, nil + } + if len(src) >= 2 && u.current.bomPolicy&acceptBOM != 0 { + switch { + case src[0] == 0xfe && src[1] == 0xff: + u.current.endianness = BigEndian + nSrc = 2 + case src[0] == 0xff && src[1] == 0xfe: + u.current.endianness = LittleEndian + nSrc = 2 + default: + if u.current.bomPolicy&requireBOM != 0 { + return 0, 0, ErrMissingBOM + } + } + u.current.bomPolicy = IgnoreBOM + } + + var r rune + var dSize, sSize int + for nSrc < len(src) { + if nSrc+1 < len(src) { + x := uint16(src[nSrc+0])<<8 | uint16(src[nSrc+1]) + if u.current.endianness == LittleEndian { + x = x>>8 | x<<8 + } + r, sSize = rune(x), 2 + if utf16.IsSurrogate(r) { + if nSrc+3 < len(src) { + x = uint16(src[nSrc+2])<<8 | uint16(src[nSrc+3]) + if u.current.endianness == LittleEndian { + x = x>>8 | x<<8 + } + // Save for next iteration if it is not a high surrogate. + if isHighSurrogate(rune(x)) { + r, sSize = utf16.DecodeRune(r, rune(x)), 4 + } + } else if !atEOF { + err = transform.ErrShortSrc + break + } + } + if dSize = utf8.RuneLen(r); dSize < 0 { + r, dSize = utf8.RuneError, 3 + } + } else if atEOF { + // Single trailing byte. + r, dSize, sSize = utf8.RuneError, 3, 1 + } else { + err = transform.ErrShortSrc + break + } + if nDst+dSize > len(dst) { + err = transform.ErrShortDst + break + } + nDst += utf8.EncodeRune(dst[nDst:], r) + nSrc += sSize + } + return nDst, nSrc, err +} + +func isHighSurrogate(r rune) bool { + return 0xDC00 <= r && r <= 0xDFFF +} + +type utf16Encoder struct { + endianness Endianness + initialBOMPolicy BOMPolicy + currentBOMPolicy BOMPolicy +} + +func (u *utf16Encoder) Reset() { + u.currentBOMPolicy = u.initialBOMPolicy +} + +func (u *utf16Encoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { + if u.currentBOMPolicy&writeBOM != 0 { + if len(dst) < 2 { + return 0, 0, transform.ErrShortDst + } + dst[0], dst[1] = 0xfe, 0xff + u.currentBOMPolicy = IgnoreBOM + nDst = 2 + } + + r, size := rune(0), 0 + for nSrc < len(src) { + r = rune(src[nSrc]) + + // Decode a 1-byte rune. + if r < utf8.RuneSelf { + size = 1 + + } else { + // Decode a multi-byte rune. + r, size = utf8.DecodeRune(src[nSrc:]) + if size == 1 { + // All valid runes of size 1 (those below utf8.RuneSelf) were + // handled above. We have invalid UTF-8 or we haven't seen the + // full character yet. + if !atEOF && !utf8.FullRune(src[nSrc:]) { + err = transform.ErrShortSrc + break + } + } + } + + if r <= 0xffff { + if nDst+2 > len(dst) { + err = transform.ErrShortDst + break + } + dst[nDst+0] = uint8(r >> 8) + dst[nDst+1] = uint8(r) + nDst += 2 + } else { + if nDst+4 > len(dst) { + err = transform.ErrShortDst + break + } + r1, r2 := utf16.EncodeRune(r) + dst[nDst+0] = uint8(r1 >> 8) + dst[nDst+1] = uint8(r1) + dst[nDst+2] = uint8(r2 >> 8) + dst[nDst+3] = uint8(r2) + nDst += 4 + } + nSrc += size + } + + if u.endianness == LittleEndian { + for i := 0; i < nDst; i += 2 { + dst[i], dst[i+1] = dst[i+1], dst[i] + } + } + return nDst, nSrc, err +} diff --git a/backend/vendor/golang.org/x/text/internal/utf8internal/utf8internal.go b/backend/vendor/golang.org/x/text/internal/utf8internal/utf8internal.go new file mode 100644 index 0000000..e5c53b1 --- /dev/null +++ b/backend/vendor/golang.org/x/text/internal/utf8internal/utf8internal.go @@ -0,0 +1,87 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package utf8internal contains low-level utf8-related constants, tables, etc. +// that are used internally by the text package. +package utf8internal + +// The default lowest and highest continuation byte. +const ( + LoCB = 0x80 // 1000 0000 + HiCB = 0xBF // 1011 1111 +) + +// Constants related to getting information of first bytes of UTF-8 sequences. +const ( + // ASCII identifies a UTF-8 byte as ASCII. + ASCII = as + + // FirstInvalid indicates a byte is invalid as a first byte of a UTF-8 + // sequence. + FirstInvalid = xx + + // SizeMask is a mask for the size bits. Use use x&SizeMask to get the size. + SizeMask = 7 + + // AcceptShift is the right-shift count for the first byte info byte to get + // the index into the AcceptRanges table. See AcceptRanges. + AcceptShift = 4 + + // The names of these constants are chosen to give nice alignment in the + // table below. The first nibble is an index into acceptRanges or F for + // special one-byte cases. The second nibble is the Rune length or the + // Status for the special one-byte case. + xx = 0xF1 // invalid: size 1 + as = 0xF0 // ASCII: size 1 + s1 = 0x02 // accept 0, size 2 + s2 = 0x13 // accept 1, size 3 + s3 = 0x03 // accept 0, size 3 + s4 = 0x23 // accept 2, size 3 + s5 = 0x34 // accept 3, size 4 + s6 = 0x04 // accept 0, size 4 + s7 = 0x44 // accept 4, size 4 +) + +// First is information about the first byte in a UTF-8 sequence. +var First = [256]uint8{ + // 1 2 3 4 5 6 7 8 9 A B C D E F + as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x00-0x0F + as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x10-0x1F + as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x20-0x2F + as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x30-0x3F + as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x40-0x4F + as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x50-0x5F + as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x60-0x6F + as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x70-0x7F + // 1 2 3 4 5 6 7 8 9 A B C D E F + xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0x80-0x8F + xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0x90-0x9F + xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0xA0-0xAF + xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0xB0-0xBF + xx, xx, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, // 0xC0-0xCF + s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, // 0xD0-0xDF + s2, s3, s3, s3, s3, s3, s3, s3, s3, s3, s3, s3, s3, s4, s3, s3, // 0xE0-0xEF + s5, s6, s6, s6, s7, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0xF0-0xFF +} + +// AcceptRange gives the range of valid values for the second byte in a UTF-8 +// sequence for any value for First that is not ASCII or FirstInvalid. +type AcceptRange struct { + Lo uint8 // lowest value for second byte. + Hi uint8 // highest value for second byte. +} + +// AcceptRanges is a slice of AcceptRange values. For a given byte sequence b +// +// AcceptRanges[First[b[0]]>>AcceptShift] +// +// will give the value of AcceptRange for the multi-byte UTF-8 sequence starting +// at b[0]. +var AcceptRanges = [...]AcceptRange{ + 0: {LoCB, HiCB}, + 1: {0xA0, HiCB}, + 2: {LoCB, 0x9F}, + 3: {0x90, HiCB}, + 4: {LoCB, 0x8F}, +} diff --git a/backend/vendor/golang.org/x/tools/cover/profile.go b/backend/vendor/golang.org/x/tools/cover/profile.go new file mode 100644 index 0000000..47a9a54 --- /dev/null +++ b/backend/vendor/golang.org/x/tools/cover/profile.go @@ -0,0 +1,266 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package cover provides support for parsing coverage profiles +// generated by "go test -coverprofile=cover.out". +package cover // import "golang.org/x/tools/cover" + +import ( + "bufio" + "errors" + "fmt" + "io" + "math" + "os" + "sort" + "strconv" + "strings" +) + +// Profile represents the profiling data for a specific file. +type Profile struct { + FileName string + Mode string + Blocks []ProfileBlock +} + +// ProfileBlock represents a single block of profiling data. +type ProfileBlock struct { + StartLine, StartCol int + EndLine, EndCol int + NumStmt, Count int +} + +type byFileName []*Profile + +func (p byFileName) Len() int { return len(p) } +func (p byFileName) Less(i, j int) bool { return p[i].FileName < p[j].FileName } +func (p byFileName) Swap(i, j int) { p[i], p[j] = p[j], p[i] } + +// ParseProfiles parses profile data in the specified file and returns a +// Profile for each source file described therein. +func ParseProfiles(fileName string) ([]*Profile, error) { + pf, err := os.Open(fileName) + if err != nil { + return nil, err + } + defer pf.Close() + return ParseProfilesFromReader(pf) +} + +// ParseProfilesFromReader parses profile data from the Reader and +// returns a Profile for each source file described therein. +func ParseProfilesFromReader(rd io.Reader) ([]*Profile, error) { + // First line is "mode: foo", where foo is "set", "count", or "atomic". + // Rest of file is in the format + // encoding/base64/base64.go:34.44,37.40 3 1 + // where the fields are: name.go:line.column,line.column numberOfStatements count + files := make(map[string]*Profile) + s := bufio.NewScanner(rd) + mode := "" + for s.Scan() { + line := s.Text() + if mode == "" { + const p = "mode: " + if !strings.HasPrefix(line, p) || line == p { + return nil, fmt.Errorf("bad mode line: %v", line) + } + mode = line[len(p):] + continue + } + fn, b, err := parseLine(line) + if err != nil { + return nil, fmt.Errorf("line %q doesn't match expected format: %v", line, err) + } + p := files[fn] + if p == nil { + p = &Profile{ + FileName: fn, + Mode: mode, + } + files[fn] = p + } + p.Blocks = append(p.Blocks, b) + } + if err := s.Err(); err != nil { + return nil, err + } + for _, p := range files { + sort.Sort(blocksByStart(p.Blocks)) + // Merge samples from the same location. + j := 1 + for i := 1; i < len(p.Blocks); i++ { + b := p.Blocks[i] + last := p.Blocks[j-1] + if b.StartLine == last.StartLine && + b.StartCol == last.StartCol && + b.EndLine == last.EndLine && + b.EndCol == last.EndCol { + if b.NumStmt != last.NumStmt { + return nil, fmt.Errorf("inconsistent NumStmt: changed from %d to %d", last.NumStmt, b.NumStmt) + } + if mode == "set" { + p.Blocks[j-1].Count |= b.Count + } else { + p.Blocks[j-1].Count += b.Count + } + continue + } + p.Blocks[j] = b + j++ + } + p.Blocks = p.Blocks[:j] + } + // Generate a sorted slice. + profiles := make([]*Profile, 0, len(files)) + for _, profile := range files { + profiles = append(profiles, profile) + } + sort.Sort(byFileName(profiles)) + return profiles, nil +} + +// parseLine parses a line from a coverage file. +// It is equivalent to the regex +// ^(.+):([0-9]+)\.([0-9]+),([0-9]+)\.([0-9]+) ([0-9]+) ([0-9]+)$ +// +// However, it is much faster: https://golang.org/cl/179377 +func parseLine(l string) (fileName string, block ProfileBlock, err error) { + end := len(l) + + b := ProfileBlock{} + b.Count, end, err = seekBack(l, ' ', end, "Count") + if err != nil { + return "", b, err + } + b.NumStmt, end, err = seekBack(l, ' ', end, "NumStmt") + if err != nil { + return "", b, err + } + b.EndCol, end, err = seekBack(l, '.', end, "EndCol") + if err != nil { + return "", b, err + } + b.EndLine, end, err = seekBack(l, ',', end, "EndLine") + if err != nil { + return "", b, err + } + b.StartCol, end, err = seekBack(l, '.', end, "StartCol") + if err != nil { + return "", b, err + } + b.StartLine, end, err = seekBack(l, ':', end, "StartLine") + if err != nil { + return "", b, err + } + fn := l[0:end] + if fn == "" { + return "", b, errors.New("a FileName cannot be blank") + } + return fn, b, nil +} + +// seekBack searches backwards from end to find sep in l, then returns the +// value between sep and end as an integer. +// If seekBack fails, the returned error will reference what. +func seekBack(l string, sep byte, end int, what string) (value int, nextSep int, err error) { + // Since we're seeking backwards and we know only ASCII is legal for these values, + // we can ignore the possibility of non-ASCII characters. + for start := end - 1; start >= 0; start-- { + if l[start] == sep { + i, err := strconv.Atoi(l[start+1 : end]) + if err != nil { + return 0, 0, fmt.Errorf("couldn't parse %q: %v", what, err) + } + if i < 0 { + return 0, 0, fmt.Errorf("negative values are not allowed for %s, found %d", what, i) + } + return i, start, nil + } + } + return 0, 0, fmt.Errorf("couldn't find a %s before %s", string(sep), what) +} + +type blocksByStart []ProfileBlock + +func (b blocksByStart) Len() int { return len(b) } +func (b blocksByStart) Swap(i, j int) { b[i], b[j] = b[j], b[i] } +func (b blocksByStart) Less(i, j int) bool { + bi, bj := b[i], b[j] + return bi.StartLine < bj.StartLine || bi.StartLine == bj.StartLine && bi.StartCol < bj.StartCol +} + +// Boundary represents the position in a source file of the beginning or end of a +// block as reported by the coverage profile. In HTML mode, it will correspond to +// the opening or closing of a tag and will be used to colorize the source +type Boundary struct { + Offset int // Location as a byte offset in the source file. + Start bool // Is this the start of a block? + Count int // Event count from the cover profile. + Norm float64 // Count normalized to [0..1]. + Index int // Order in input file. +} + +// Boundaries returns a Profile as a set of Boundary objects within the provided src. +func (p *Profile) Boundaries(src []byte) (boundaries []Boundary) { + // Find maximum count. + max := 0 + for _, b := range p.Blocks { + if b.Count > max { + max = b.Count + } + } + // Divisor for normalization. + divisor := math.Log(float64(max)) + + // boundary returns a Boundary, populating the Norm field with a normalized Count. + index := 0 + boundary := func(offset int, start bool, count int) Boundary { + b := Boundary{Offset: offset, Start: start, Count: count, Index: index} + index++ + if !start || count == 0 { + return b + } + if max <= 1 { + b.Norm = 0.8 // Profile is in"set" mode; we want a heat map. Use cov8 in the CSS. + } else if count > 0 { + b.Norm = math.Log(float64(count)) / divisor + } + return b + } + + line, col := 1, 2 // TODO: Why is this 2? + for si, bi := 0, 0; si < len(src) && bi < len(p.Blocks); { + b := p.Blocks[bi] + if b.StartLine == line && b.StartCol == col { + boundaries = append(boundaries, boundary(si, true, b.Count)) + } + if b.EndLine == line && b.EndCol == col || line > b.EndLine { + boundaries = append(boundaries, boundary(si, false, 0)) + bi++ + continue // Don't advance through src; maybe the next block starts here. + } + if src[si] == '\n' { + line++ + col = 0 + } + col++ + si++ + } + sort.Sort(boundariesByPos(boundaries)) + return +} + +type boundariesByPos []Boundary + +func (b boundariesByPos) Len() int { return len(b) } +func (b boundariesByPos) Swap(i, j int) { b[i], b[j] = b[j], b[i] } +func (b boundariesByPos) Less(i, j int) bool { + if b[i].Offset == b[j].Offset { + // Boundaries at the same offset should be ordered according to + // their original position. + return b[i].Index < b[j].Index + } + return b[i].Offset < b[j].Offset +} diff --git a/backend/vendor/golang.org/x/tools/go/ast/astutil/enclosing.go b/backend/vendor/golang.org/x/tools/go/ast/astutil/enclosing.go new file mode 100644 index 0000000..0fb4e7e --- /dev/null +++ b/backend/vendor/golang.org/x/tools/go/ast/astutil/enclosing.go @@ -0,0 +1,663 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package astutil + +// This file defines utilities for working with source positions. + +import ( + "fmt" + "go/ast" + "go/token" + "sort" +) + +// PathEnclosingInterval returns the node that encloses the source +// interval [start, end), and all its ancestors up to the AST root. +// +// The definition of "enclosing" used by this function considers +// additional whitespace abutting a node to be enclosed by it. +// In this example: +// +// z := x + y // add them +// <-A-> +// <----B-----> +// +// the ast.BinaryExpr(+) node is considered to enclose interval B +// even though its [Pos()..End()) is actually only interval A. +// This behaviour makes user interfaces more tolerant of imperfect +// input. +// +// This function treats tokens as nodes, though they are not included +// in the result. e.g. PathEnclosingInterval("+") returns the +// enclosing ast.BinaryExpr("x + y"). +// +// If start==end, the 1-char interval following start is used instead. +// +// The 'exact' result is true if the interval contains only path[0] +// and perhaps some adjacent whitespace. It is false if the interval +// overlaps multiple children of path[0], or if it contains only +// interior whitespace of path[0]. +// In this example: +// +// z := x + y // add them +// <--C--> <---E--> +// ^ +// D +// +// intervals C, D and E are inexact. C is contained by the +// z-assignment statement, because it spans three of its children (:=, +// x, +). So too is the 1-char interval D, because it contains only +// interior whitespace of the assignment. E is considered interior +// whitespace of the BlockStmt containing the assignment. +// +// The resulting path is never empty; it always contains at least the +// 'root' *ast.File. Ideally PathEnclosingInterval would reject +// intervals that lie wholly or partially outside the range of the +// file, but unfortunately ast.File records only the token.Pos of +// the 'package' keyword, but not of the start of the file itself. +func PathEnclosingInterval(root *ast.File, start, end token.Pos) (path []ast.Node, exact bool) { + // fmt.Printf("EnclosingInterval %d %d\n", start, end) // debugging + + // Precondition: node.[Pos..End) and adjoining whitespace contain [start, end). + var visit func(node ast.Node) bool + visit = func(node ast.Node) bool { + path = append(path, node) + + nodePos := node.Pos() + nodeEnd := node.End() + + // fmt.Printf("visit(%T, %d, %d)\n", node, nodePos, nodeEnd) // debugging + + // Intersect [start, end) with interval of node. + if start < nodePos { + start = nodePos + } + if end > nodeEnd { + end = nodeEnd + } + + // Find sole child that contains [start, end). + children := childrenOf(node) + l := len(children) + for i, child := range children { + // [childPos, childEnd) is unaugmented interval of child. + childPos := child.Pos() + childEnd := child.End() + + // [augPos, augEnd) is whitespace-augmented interval of child. + augPos := childPos + augEnd := childEnd + if i > 0 { + augPos = children[i-1].End() // start of preceding whitespace + } + if i < l-1 { + nextChildPos := children[i+1].Pos() + // Does [start, end) lie between child and next child? + if start >= augEnd && end <= nextChildPos { + return false // inexact match + } + augEnd = nextChildPos // end of following whitespace + } + + // fmt.Printf("\tchild %d: [%d..%d)\tcontains interval [%d..%d)?\n", + // i, augPos, augEnd, start, end) // debugging + + // Does augmented child strictly contain [start, end)? + if augPos <= start && end <= augEnd { + if is[tokenNode](child) { + return true + } + + // childrenOf elides the FuncType node beneath FuncDecl. + // Add it back here for TypeParams, Params, Results, + // all FieldLists). But we don't add it back for the "func" token + // even though it is the tree at FuncDecl.Type.Func. + if decl, ok := node.(*ast.FuncDecl); ok { + if fields, ok := child.(*ast.FieldList); ok && fields != decl.Recv { + path = append(path, decl.Type) + } + } + + return visit(child) + } + + // Does [start, end) overlap multiple children? + // i.e. left-augmented child contains start + // but LR-augmented child does not contain end. + if start < childEnd && end > augEnd { + break + } + } + + // No single child contained [start, end), + // so node is the result. Is it exact? + + // (It's tempting to put this condition before the + // child loop, but it gives the wrong result in the + // case where a node (e.g. ExprStmt) and its sole + // child have equal intervals.) + if start == nodePos && end == nodeEnd { + return true // exact match + } + + return false // inexact: overlaps multiple children + } + + // Ensure [start,end) is nondecreasing. + if start > end { + start, end = end, start + } + + if start < root.End() && end > root.Pos() { + if start == end { + end = start + 1 // empty interval => interval of size 1 + } + exact = visit(root) + + // Reverse the path: + for i, l := 0, len(path); i < l/2; i++ { + path[i], path[l-1-i] = path[l-1-i], path[i] + } + } else { + // Selection lies within whitespace preceding the + // first (or following the last) declaration in the file. + // The result nonetheless always includes the ast.File. + path = append(path, root) + } + + return +} + +// tokenNode is a dummy implementation of ast.Node for a single token. +// They are used transiently by PathEnclosingInterval but never escape +// this package. +type tokenNode struct { + pos token.Pos + end token.Pos +} + +func (n tokenNode) Pos() token.Pos { + return n.pos +} + +func (n tokenNode) End() token.Pos { + return n.end +} + +func tok(pos token.Pos, len int) ast.Node { + return tokenNode{pos, pos + token.Pos(len)} +} + +// childrenOf returns the direct non-nil children of ast.Node n. +// It may include fake ast.Node implementations for bare tokens. +// it is not safe to call (e.g.) ast.Walk on such nodes. +func childrenOf(n ast.Node) []ast.Node { + var children []ast.Node + + // First add nodes for all true subtrees. + ast.Inspect(n, func(node ast.Node) bool { + if node == n { // push n + return true // recur + } + if node != nil { // push child + children = append(children, node) + } + return false // no recursion + }) + + // TODO(adonovan): be more careful about missing (!Pos.Valid) + // tokens in trees produced from invalid input. + + // Then add fake Nodes for bare tokens. + switch n := n.(type) { + case *ast.ArrayType: + children = append(children, + tok(n.Lbrack, len("[")), + tok(n.Elt.End(), len("]"))) + + case *ast.AssignStmt: + children = append(children, + tok(n.TokPos, len(n.Tok.String()))) + + case *ast.BasicLit: + children = append(children, + tok(n.ValuePos, len(n.Value))) + + case *ast.BinaryExpr: + children = append(children, tok(n.OpPos, len(n.Op.String()))) + + case *ast.BlockStmt: + if n.Lbrace.IsValid() { + children = append(children, tok(n.Lbrace, len("{"))) + } + if n.Rbrace.IsValid() { + children = append(children, tok(n.Rbrace, len("}"))) + } + + case *ast.BranchStmt: + children = append(children, + tok(n.TokPos, len(n.Tok.String()))) + + case *ast.CallExpr: + children = append(children, + tok(n.Lparen, len("(")), + tok(n.Rparen, len(")"))) + if n.Ellipsis != 0 { + children = append(children, tok(n.Ellipsis, len("..."))) + } + + case *ast.CaseClause: + if n.List == nil { + children = append(children, + tok(n.Case, len("default"))) + } else { + children = append(children, + tok(n.Case, len("case"))) + } + children = append(children, tok(n.Colon, len(":"))) + + case *ast.ChanType: + switch n.Dir { + case ast.RECV: + children = append(children, tok(n.Begin, len("<-chan"))) + case ast.SEND: + children = append(children, tok(n.Begin, len("chan<-"))) + case ast.RECV | ast.SEND: + children = append(children, tok(n.Begin, len("chan"))) + } + + case *ast.CommClause: + if n.Comm == nil { + children = append(children, + tok(n.Case, len("default"))) + } else { + children = append(children, + tok(n.Case, len("case"))) + } + children = append(children, tok(n.Colon, len(":"))) + + case *ast.Comment: + // nop + + case *ast.CommentGroup: + // nop + + case *ast.CompositeLit: + children = append(children, + tok(n.Lbrace, len("{")), + tok(n.Rbrace, len("{"))) + + case *ast.DeclStmt: + // nop + + case *ast.DeferStmt: + children = append(children, + tok(n.Defer, len("defer"))) + + case *ast.Ellipsis: + children = append(children, + tok(n.Ellipsis, len("..."))) + + case *ast.EmptyStmt: + // nop + + case *ast.ExprStmt: + // nop + + case *ast.Field: + // TODO(adonovan): Field.{Doc,Comment,Tag}? + + case *ast.FieldList: + if n.Opening.IsValid() { + children = append(children, tok(n.Opening, len("("))) + } + if n.Closing.IsValid() { + children = append(children, tok(n.Closing, len(")"))) + } + + case *ast.File: + // TODO test: Doc + children = append(children, + tok(n.Package, len("package"))) + + case *ast.ForStmt: + children = append(children, + tok(n.For, len("for"))) + + case *ast.FuncDecl: + // TODO(adonovan): FuncDecl.Comment? + + // Uniquely, FuncDecl breaks the invariant that + // preorder traversal yields tokens in lexical order: + // in fact, FuncDecl.Recv precedes FuncDecl.Type.Func. + // + // As a workaround, we inline the case for FuncType + // here and order things correctly. + // We also need to insert the elided FuncType just + // before the 'visit' recursion. + // + children = nil // discard ast.Walk(FuncDecl) info subtrees + children = append(children, tok(n.Type.Func, len("func"))) + if n.Recv != nil { + children = append(children, n.Recv) + } + children = append(children, n.Name) + if tparams := n.Type.TypeParams; tparams != nil { + children = append(children, tparams) + } + if n.Type.Params != nil { + children = append(children, n.Type.Params) + } + if n.Type.Results != nil { + children = append(children, n.Type.Results) + } + if n.Body != nil { + children = append(children, n.Body) + } + + case *ast.FuncLit: + // nop + + case *ast.FuncType: + if n.Func != 0 { + children = append(children, + tok(n.Func, len("func"))) + } + + case *ast.GenDecl: + children = append(children, + tok(n.TokPos, len(n.Tok.String()))) + if n.Lparen != 0 { + children = append(children, + tok(n.Lparen, len("(")), + tok(n.Rparen, len(")"))) + } + + case *ast.GoStmt: + children = append(children, + tok(n.Go, len("go"))) + + case *ast.Ident: + children = append(children, + tok(n.NamePos, len(n.Name))) + + case *ast.IfStmt: + children = append(children, + tok(n.If, len("if"))) + + case *ast.ImportSpec: + // TODO(adonovan): ImportSpec.{Doc,EndPos}? + + case *ast.IncDecStmt: + children = append(children, + tok(n.TokPos, len(n.Tok.String()))) + + case *ast.IndexExpr: + children = append(children, + tok(n.Lbrack, len("[")), + tok(n.Rbrack, len("]"))) + + case *ast.IndexListExpr: + children = append(children, + tok(n.Lbrack, len("[")), + tok(n.Rbrack, len("]"))) + + case *ast.InterfaceType: + children = append(children, + tok(n.Interface, len("interface"))) + + case *ast.KeyValueExpr: + children = append(children, + tok(n.Colon, len(":"))) + + case *ast.LabeledStmt: + children = append(children, + tok(n.Colon, len(":"))) + + case *ast.MapType: + children = append(children, + tok(n.Map, len("map"))) + + case *ast.ParenExpr: + children = append(children, + tok(n.Lparen, len("(")), + tok(n.Rparen, len(")"))) + + case *ast.RangeStmt: + children = append(children, + tok(n.For, len("for")), + tok(n.TokPos, len(n.Tok.String()))) + + case *ast.ReturnStmt: + children = append(children, + tok(n.Return, len("return"))) + + case *ast.SelectStmt: + children = append(children, + tok(n.Select, len("select"))) + + case *ast.SelectorExpr: + // nop + + case *ast.SendStmt: + children = append(children, + tok(n.Arrow, len("<-"))) + + case *ast.SliceExpr: + children = append(children, + tok(n.Lbrack, len("[")), + tok(n.Rbrack, len("]"))) + + case *ast.StarExpr: + children = append(children, tok(n.Star, len("*"))) + + case *ast.StructType: + children = append(children, tok(n.Struct, len("struct"))) + + case *ast.SwitchStmt: + children = append(children, tok(n.Switch, len("switch"))) + + case *ast.TypeAssertExpr: + children = append(children, + tok(n.Lparen-1, len(".")), + tok(n.Lparen, len("(")), + tok(n.Rparen, len(")"))) + + case *ast.TypeSpec: + // TODO(adonovan): TypeSpec.{Doc,Comment}? + + case *ast.TypeSwitchStmt: + children = append(children, tok(n.Switch, len("switch"))) + + case *ast.UnaryExpr: + children = append(children, tok(n.OpPos, len(n.Op.String()))) + + case *ast.ValueSpec: + // TODO(adonovan): ValueSpec.{Doc,Comment}? + + case *ast.BadDecl, *ast.BadExpr, *ast.BadStmt: + // nop + } + + // TODO(adonovan): opt: merge the logic of ast.Inspect() into + // the switch above so we can make interleaved callbacks for + // both Nodes and Tokens in the right order and avoid the need + // to sort. + sort.Sort(byPos(children)) + + return children +} + +type byPos []ast.Node + +func (sl byPos) Len() int { + return len(sl) +} +func (sl byPos) Less(i, j int) bool { + return sl[i].Pos() < sl[j].Pos() +} +func (sl byPos) Swap(i, j int) { + sl[i], sl[j] = sl[j], sl[i] +} + +// NodeDescription returns a description of the concrete type of n suitable +// for a user interface. +// +// TODO(adonovan): in some cases (e.g. Field, FieldList, Ident, +// StarExpr) we could be much more specific given the path to the AST +// root. Perhaps we should do that. +func NodeDescription(n ast.Node) string { + switch n := n.(type) { + case *ast.ArrayType: + return "array type" + case *ast.AssignStmt: + return "assignment" + case *ast.BadDecl: + return "bad declaration" + case *ast.BadExpr: + return "bad expression" + case *ast.BadStmt: + return "bad statement" + case *ast.BasicLit: + return "basic literal" + case *ast.BinaryExpr: + return fmt.Sprintf("binary %s operation", n.Op) + case *ast.BlockStmt: + return "block" + case *ast.BranchStmt: + switch n.Tok { + case token.BREAK: + return "break statement" + case token.CONTINUE: + return "continue statement" + case token.GOTO: + return "goto statement" + case token.FALLTHROUGH: + return "fall-through statement" + } + case *ast.CallExpr: + if len(n.Args) == 1 && !n.Ellipsis.IsValid() { + return "function call (or conversion)" + } + return "function call" + case *ast.CaseClause: + return "case clause" + case *ast.ChanType: + return "channel type" + case *ast.CommClause: + return "communication clause" + case *ast.Comment: + return "comment" + case *ast.CommentGroup: + return "comment group" + case *ast.CompositeLit: + return "composite literal" + case *ast.DeclStmt: + return NodeDescription(n.Decl) + " statement" + case *ast.DeferStmt: + return "defer statement" + case *ast.Ellipsis: + return "ellipsis" + case *ast.EmptyStmt: + return "empty statement" + case *ast.ExprStmt: + return "expression statement" + case *ast.Field: + // Can be any of these: + // struct {x, y int} -- struct field(s) + // struct {T} -- anon struct field + // interface {I} -- interface embedding + // interface {f()} -- interface method + // func (A) func(B) C -- receiver, param(s), result(s) + return "field/method/parameter" + case *ast.FieldList: + return "field/method/parameter list" + case *ast.File: + return "source file" + case *ast.ForStmt: + return "for loop" + case *ast.FuncDecl: + return "function declaration" + case *ast.FuncLit: + return "function literal" + case *ast.FuncType: + return "function type" + case *ast.GenDecl: + switch n.Tok { + case token.IMPORT: + return "import declaration" + case token.CONST: + return "constant declaration" + case token.TYPE: + return "type declaration" + case token.VAR: + return "variable declaration" + } + case *ast.GoStmt: + return "go statement" + case *ast.Ident: + return "identifier" + case *ast.IfStmt: + return "if statement" + case *ast.ImportSpec: + return "import specification" + case *ast.IncDecStmt: + if n.Tok == token.INC { + return "increment statement" + } + return "decrement statement" + case *ast.IndexExpr: + return "index expression" + case *ast.IndexListExpr: + return "index list expression" + case *ast.InterfaceType: + return "interface type" + case *ast.KeyValueExpr: + return "key/value association" + case *ast.LabeledStmt: + return "statement label" + case *ast.MapType: + return "map type" + case *ast.Package: + return "package" + case *ast.ParenExpr: + return "parenthesized " + NodeDescription(n.X) + case *ast.RangeStmt: + return "range loop" + case *ast.ReturnStmt: + return "return statement" + case *ast.SelectStmt: + return "select statement" + case *ast.SelectorExpr: + return "selector" + case *ast.SendStmt: + return "channel send" + case *ast.SliceExpr: + return "slice expression" + case *ast.StarExpr: + return "*-operation" // load/store expr or pointer type + case *ast.StructType: + return "struct type" + case *ast.SwitchStmt: + return "switch statement" + case *ast.TypeAssertExpr: + return "type assertion" + case *ast.TypeSpec: + return "type specification" + case *ast.TypeSwitchStmt: + return "type switch" + case *ast.UnaryExpr: + return fmt.Sprintf("unary %s operation", n.Op) + case *ast.ValueSpec: + return "value specification" + + } + panic(fmt.Sprintf("unexpected node type: %T", n)) +} + +func is[T any](x any) bool { + _, ok := x.(T) + return ok +} diff --git a/backend/vendor/golang.org/x/tools/go/ast/astutil/imports.go b/backend/vendor/golang.org/x/tools/go/ast/astutil/imports.go new file mode 100644 index 0000000..5bacc0f --- /dev/null +++ b/backend/vendor/golang.org/x/tools/go/ast/astutil/imports.go @@ -0,0 +1,472 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package astutil contains common utilities for working with the Go AST. +package astutil // import "golang.org/x/tools/go/ast/astutil" + +import ( + "fmt" + "go/ast" + "go/token" + "slices" + "strconv" + "strings" +) + +// AddImport adds the import path to the file f, if absent. +func AddImport(fset *token.FileSet, f *ast.File, path string) (added bool) { + return AddNamedImport(fset, f, "", path) +} + +// AddNamedImport adds the import with the given name and path to the file f, if absent. +// If name is not empty, it is used to rename the import. +// +// For example, calling +// +// AddNamedImport(fset, f, "pathpkg", "path") +// +// adds +// +// import pathpkg "path" +func AddNamedImport(fset *token.FileSet, f *ast.File, name, path string) (added bool) { + if imports(f, name, path) { + return false + } + + newImport := &ast.ImportSpec{ + Path: &ast.BasicLit{ + Kind: token.STRING, + Value: strconv.Quote(path), + }, + } + if name != "" { + newImport.Name = &ast.Ident{Name: name} + } + + // Find an import decl to add to. + // The goal is to find an existing import + // whose import path has the longest shared + // prefix with path. + var ( + bestMatch = -1 // length of longest shared prefix + lastImport = -1 // index in f.Decls of the file's final import decl + impDecl *ast.GenDecl // import decl containing the best match + impIndex = -1 // spec index in impDecl containing the best match + + isThirdPartyPath = isThirdParty(path) + ) + for i, decl := range f.Decls { + gen, ok := decl.(*ast.GenDecl) + if ok && gen.Tok == token.IMPORT { + lastImport = i + // Do not add to import "C", to avoid disrupting the + // association with its doc comment, breaking cgo. + if declImports(gen, "C") { + continue + } + + // Match an empty import decl if that's all that is available. + if len(gen.Specs) == 0 && bestMatch == -1 { + impDecl = gen + } + + // Compute longest shared prefix with imports in this group and find best + // matched import spec. + // 1. Always prefer import spec with longest shared prefix. + // 2. While match length is 0, + // - for stdlib package: prefer first import spec. + // - for third party package: prefer first third party import spec. + // We cannot use last import spec as best match for third party package + // because grouped imports are usually placed last by goimports -local + // flag. + // See issue #19190. + seenAnyThirdParty := false + for j, spec := range gen.Specs { + impspec := spec.(*ast.ImportSpec) + p := importPath(impspec) + n := matchLen(p, path) + if n > bestMatch || (bestMatch == 0 && !seenAnyThirdParty && isThirdPartyPath) { + bestMatch = n + impDecl = gen + impIndex = j + } + seenAnyThirdParty = seenAnyThirdParty || isThirdParty(p) + } + } + } + + // If no import decl found, add one after the last import. + if impDecl == nil { + impDecl = &ast.GenDecl{ + Tok: token.IMPORT, + } + if lastImport >= 0 { + impDecl.TokPos = f.Decls[lastImport].End() + } else { + // There are no existing imports. + // Our new import, preceded by a blank line, goes after the package declaration + // and after the comment, if any, that starts on the same line as the + // package declaration. + impDecl.TokPos = f.Package + + file := fset.File(f.Package) + pkgLine := file.Line(f.Package) + for _, c := range f.Comments { + if file.Line(c.Pos()) > pkgLine { + break + } + // +2 for a blank line + impDecl.TokPos = c.End() + 2 + } + } + f.Decls = append(f.Decls, nil) + copy(f.Decls[lastImport+2:], f.Decls[lastImport+1:]) + f.Decls[lastImport+1] = impDecl + } + + // Insert new import at insertAt. + insertAt := 0 + if impIndex >= 0 { + // insert after the found import + insertAt = impIndex + 1 + } + impDecl.Specs = append(impDecl.Specs, nil) + copy(impDecl.Specs[insertAt+1:], impDecl.Specs[insertAt:]) + impDecl.Specs[insertAt] = newImport + pos := impDecl.Pos() + if insertAt > 0 { + // If there is a comment after an existing import, preserve the comment + // position by adding the new import after the comment. + if spec, ok := impDecl.Specs[insertAt-1].(*ast.ImportSpec); ok && spec.Comment != nil { + pos = spec.Comment.End() + } else { + // Assign same position as the previous import, + // so that the sorter sees it as being in the same block. + pos = impDecl.Specs[insertAt-1].Pos() + } + } + if newImport.Name != nil { + newImport.Name.NamePos = pos + } + newImport.Path.ValuePos = pos + newImport.EndPos = pos + + // Clean up parens. impDecl contains at least one spec. + if len(impDecl.Specs) == 1 { + // Remove unneeded parens. + impDecl.Lparen = token.NoPos + } else if !impDecl.Lparen.IsValid() { + // impDecl needs parens added. + impDecl.Lparen = impDecl.Specs[0].Pos() + } + + f.Imports = append(f.Imports, newImport) + + if len(f.Decls) <= 1 { + return true + } + + // Merge all the import declarations into the first one. + var first *ast.GenDecl + for i := 0; i < len(f.Decls); i++ { + decl := f.Decls[i] + gen, ok := decl.(*ast.GenDecl) + if !ok || gen.Tok != token.IMPORT || declImports(gen, "C") { + continue + } + if first == nil { + first = gen + continue // Don't touch the first one. + } + // We now know there is more than one package in this import + // declaration. Ensure that it ends up parenthesized. + first.Lparen = first.Pos() + // Move the imports of the other import declaration to the first one. + for _, spec := range gen.Specs { + spec.(*ast.ImportSpec).Path.ValuePos = first.Pos() + first.Specs = append(first.Specs, spec) + } + f.Decls = slices.Delete(f.Decls, i, i+1) + i-- + } + + return true +} + +func isThirdParty(importPath string) bool { + // Third party package import path usually contains "." (".com", ".org", ...) + // This logic is taken from golang.org/x/tools/imports package. + return strings.Contains(importPath, ".") +} + +// DeleteImport deletes the import path from the file f, if present. +// If there are duplicate import declarations, all matching ones are deleted. +func DeleteImport(fset *token.FileSet, f *ast.File, path string) (deleted bool) { + return DeleteNamedImport(fset, f, "", path) +} + +// DeleteNamedImport deletes the import with the given name and path from the file f, if present. +// If there are duplicate import declarations, all matching ones are deleted. +func DeleteNamedImport(fset *token.FileSet, f *ast.File, name, path string) (deleted bool) { + var ( + delspecs = make(map[*ast.ImportSpec]bool) + delcomments = make(map[*ast.CommentGroup]bool) + ) + + // Find the import nodes that import path, if any. + for i := 0; i < len(f.Decls); i++ { + gen, ok := f.Decls[i].(*ast.GenDecl) + if !ok || gen.Tok != token.IMPORT { + continue + } + for j := 0; j < len(gen.Specs); j++ { + impspec := gen.Specs[j].(*ast.ImportSpec) + if importName(impspec) != name || importPath(impspec) != path { + continue + } + + // We found an import spec that imports path. + // Delete it. + delspecs[impspec] = true + deleted = true + gen.Specs = slices.Delete(gen.Specs, j, j+1) + + // If this was the last import spec in this decl, + // delete the decl, too. + if len(gen.Specs) == 0 { + f.Decls = slices.Delete(f.Decls, i, i+1) + i-- + break + } else if len(gen.Specs) == 1 { + if impspec.Doc != nil { + delcomments[impspec.Doc] = true + } + if impspec.Comment != nil { + delcomments[impspec.Comment] = true + } + for _, cg := range f.Comments { + // Found comment on the same line as the import spec. + if cg.End() < impspec.Pos() && fset.Position(cg.End()).Line == fset.Position(impspec.Pos()).Line { + delcomments[cg] = true + break + } + } + + spec := gen.Specs[0].(*ast.ImportSpec) + + // Move the documentation right after the import decl. + if spec.Doc != nil { + for fset.Position(gen.TokPos).Line+1 < fset.Position(spec.Doc.Pos()).Line { + fset.File(gen.TokPos).MergeLine(fset.Position(gen.TokPos).Line) + } + } + for _, cg := range f.Comments { + if cg.End() < spec.Pos() && fset.Position(cg.End()).Line == fset.Position(spec.Pos()).Line { + for fset.Position(gen.TokPos).Line+1 < fset.Position(spec.Pos()).Line { + fset.File(gen.TokPos).MergeLine(fset.Position(gen.TokPos).Line) + } + break + } + } + } + if j > 0 { + lastImpspec := gen.Specs[j-1].(*ast.ImportSpec) + lastLine := fset.PositionFor(lastImpspec.Path.ValuePos, false).Line + line := fset.PositionFor(impspec.Path.ValuePos, false).Line + + // We deleted an entry but now there may be + // a blank line-sized hole where the import was. + if line-lastLine > 1 || !gen.Rparen.IsValid() { + // There was a blank line immediately preceding the deleted import, + // so there's no need to close the hole. The right parenthesis is + // invalid after AddImport to an import statement without parenthesis. + // Do nothing. + } else if line != fset.File(gen.Rparen).LineCount() { + // There was no blank line. Close the hole. + fset.File(gen.Rparen).MergeLine(line) + } + } + j-- + } + } + + // Delete imports from f.Imports. + before := len(f.Imports) + f.Imports = slices.DeleteFunc(f.Imports, func(imp *ast.ImportSpec) bool { + _, ok := delspecs[imp] + return ok + }) + if len(f.Imports)+len(delspecs) != before { + // This can happen when the AST is invalid (i.e. imports differ between f.Decls and f.Imports). + panic(fmt.Sprintf("deleted specs from Decls but not Imports: %v", delspecs)) + } + + // Delete comments from f.Comments. + f.Comments = slices.DeleteFunc(f.Comments, func(cg *ast.CommentGroup) bool { + _, ok := delcomments[cg] + return ok + }) + + return +} + +// RewriteImport rewrites any import of path oldPath to path newPath. +func RewriteImport(fset *token.FileSet, f *ast.File, oldPath, newPath string) (rewrote bool) { + for _, imp := range f.Imports { + if importPath(imp) == oldPath { + rewrote = true + // record old End, because the default is to compute + // it using the length of imp.Path.Value. + imp.EndPos = imp.End() + imp.Path.Value = strconv.Quote(newPath) + } + } + return +} + +// UsesImport reports whether a given import is used. +// The provided File must have been parsed with syntactic object resolution +// (not using go/parser.SkipObjectResolution). +func UsesImport(f *ast.File, path string) (used bool) { + if f.Scope == nil { + panic("file f was not parsed with syntactic object resolution") + } + spec := importSpec(f, path) + if spec == nil { + return + } + + name := spec.Name.String() + switch name { + case "": + // If the package name is not explicitly specified, + // make an educated guess. This is not guaranteed to be correct. + lastSlash := strings.LastIndex(path, "/") + if lastSlash == -1 { + name = path + } else { + name = path[lastSlash+1:] + } + case "_", ".": + // Not sure if this import is used - err on the side of caution. + return true + } + + ast.Walk(visitFn(func(n ast.Node) { + sel, ok := n.(*ast.SelectorExpr) + if ok && isTopName(sel.X, name) { + used = true + } + }), f) + + return +} + +type visitFn func(node ast.Node) + +func (fn visitFn) Visit(node ast.Node) ast.Visitor { + fn(node) + return fn +} + +// imports reports whether f has an import with the specified name and path. +func imports(f *ast.File, name, path string) bool { + for _, s := range f.Imports { + if importName(s) == name && importPath(s) == path { + return true + } + } + return false +} + +// importSpec returns the import spec if f imports path, +// or nil otherwise. +func importSpec(f *ast.File, path string) *ast.ImportSpec { + for _, s := range f.Imports { + if importPath(s) == path { + return s + } + } + return nil +} + +// importName returns the name of s, +// or "" if the import is not named. +func importName(s *ast.ImportSpec) string { + if s.Name == nil { + return "" + } + return s.Name.Name +} + +// importPath returns the unquoted import path of s, +// or "" if the path is not properly quoted. +func importPath(s *ast.ImportSpec) string { + t, err := strconv.Unquote(s.Path.Value) + if err != nil { + return "" + } + return t +} + +// declImports reports whether gen contains an import of path. +func declImports(gen *ast.GenDecl, path string) bool { + if gen.Tok != token.IMPORT { + return false + } + for _, spec := range gen.Specs { + impspec := spec.(*ast.ImportSpec) + if importPath(impspec) == path { + return true + } + } + return false +} + +// matchLen returns the length of the longest path segment prefix shared by x and y. +func matchLen(x, y string) int { + n := 0 + for i := 0; i < len(x) && i < len(y) && x[i] == y[i]; i++ { + if x[i] == '/' { + n++ + } + } + return n +} + +// isTopName returns true if n is a top-level unresolved identifier with the given name. +func isTopName(n ast.Expr, name string) bool { + id, ok := n.(*ast.Ident) + return ok && id.Name == name && id.Obj == nil +} + +// Imports returns the file imports grouped by paragraph. +func Imports(fset *token.FileSet, f *ast.File) [][]*ast.ImportSpec { + var groups [][]*ast.ImportSpec + + for _, decl := range f.Decls { + genDecl, ok := decl.(*ast.GenDecl) + if !ok || genDecl.Tok != token.IMPORT { + break + } + + group := []*ast.ImportSpec{} + + var lastLine int + for _, spec := range genDecl.Specs { + importSpec := spec.(*ast.ImportSpec) + pos := importSpec.Path.ValuePos + line := fset.Position(pos).Line + if lastLine > 0 && pos > 0 && line-lastLine > 1 { + groups = append(groups, group) + group = []*ast.ImportSpec{} + } + group = append(group, importSpec) + lastLine = line + } + groups = append(groups, group) + } + + return groups +} diff --git a/backend/vendor/golang.org/x/tools/go/ast/astutil/rewrite.go b/backend/vendor/golang.org/x/tools/go/ast/astutil/rewrite.go new file mode 100644 index 0000000..4ad0549 --- /dev/null +++ b/backend/vendor/golang.org/x/tools/go/ast/astutil/rewrite.go @@ -0,0 +1,490 @@ +// Copyright 2017 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package astutil + +import ( + "fmt" + "go/ast" + "reflect" + "sort" +) + +// An ApplyFunc is invoked by Apply for each node n, even if n is nil, +// before and/or after the node's children, using a Cursor describing +// the current node and providing operations on it. +// +// The return value of ApplyFunc controls the syntax tree traversal. +// See Apply for details. +type ApplyFunc func(*Cursor) bool + +// Apply traverses a syntax tree recursively, starting with root, +// and calling pre and post for each node as described below. +// Apply returns the syntax tree, possibly modified. +// +// If pre is not nil, it is called for each node before the node's +// children are traversed (pre-order). If pre returns false, no +// children are traversed, and post is not called for that node. +// +// If post is not nil, and a prior call of pre didn't return false, +// post is called for each node after its children are traversed +// (post-order). If post returns false, traversal is terminated and +// Apply returns immediately. +// +// Only fields that refer to AST nodes are considered children; +// i.e., token.Pos, Scopes, Objects, and fields of basic types +// (strings, etc.) are ignored. +// +// Children are traversed in the order in which they appear in the +// respective node's struct definition. A package's files are +// traversed in the filenames' alphabetical order. +func Apply(root ast.Node, pre, post ApplyFunc) (result ast.Node) { + parent := &struct{ ast.Node }{root} + defer func() { + if r := recover(); r != nil && r != abort { + panic(r) + } + result = parent.Node + }() + a := &application{pre: pre, post: post} + a.apply(parent, "Node", nil, root) + return +} + +var abort = new(int) // singleton, to signal termination of Apply + +// A Cursor describes a node encountered during Apply. +// Information about the node and its parent is available +// from the Node, Parent, Name, and Index methods. +// +// If p is a variable of type and value of the current parent node +// c.Parent(), and f is the field identifier with name c.Name(), +// the following invariants hold: +// +// p.f == c.Node() if c.Index() < 0 +// p.f[c.Index()] == c.Node() if c.Index() >= 0 +// +// The methods Replace, Delete, InsertBefore, and InsertAfter +// can be used to change the AST without disrupting Apply. +// +// This type is not to be confused with [inspector.Cursor] from +// package [golang.org/x/tools/go/ast/inspector], which provides +// stateless navigation of immutable syntax trees. +type Cursor struct { + parent ast.Node + name string + iter *iterator // valid if non-nil + node ast.Node +} + +// Node returns the current Node. +func (c *Cursor) Node() ast.Node { return c.node } + +// Parent returns the parent of the current Node. +func (c *Cursor) Parent() ast.Node { return c.parent } + +// Name returns the name of the parent Node field that contains the current Node. +// If the parent is a *ast.Package and the current Node is a *ast.File, Name returns +// the filename for the current Node. +func (c *Cursor) Name() string { return c.name } + +// Index reports the index >= 0 of the current Node in the slice of Nodes that +// contains it, or a value < 0 if the current Node is not part of a slice. +// The index of the current node changes if InsertBefore is called while +// processing the current node. +func (c *Cursor) Index() int { + if c.iter != nil { + return c.iter.index + } + return -1 +} + +// field returns the current node's parent field value. +func (c *Cursor) field() reflect.Value { + return reflect.Indirect(reflect.ValueOf(c.parent)).FieldByName(c.name) +} + +// Replace replaces the current Node with n. +// The replacement node is not walked by Apply. +func (c *Cursor) Replace(n ast.Node) { + if _, ok := c.node.(*ast.File); ok { + file, ok := n.(*ast.File) + if !ok { + panic("attempt to replace *ast.File with non-*ast.File") + } + c.parent.(*ast.Package).Files[c.name] = file + return + } + + v := c.field() + if i := c.Index(); i >= 0 { + v = v.Index(i) + } + v.Set(reflect.ValueOf(n)) +} + +// Delete deletes the current Node from its containing slice. +// If the current Node is not part of a slice, Delete panics. +// As a special case, if the current node is a package file, +// Delete removes it from the package's Files map. +func (c *Cursor) Delete() { + if _, ok := c.node.(*ast.File); ok { + delete(c.parent.(*ast.Package).Files, c.name) + return + } + + i := c.Index() + if i < 0 { + panic("Delete node not contained in slice") + } + v := c.field() + l := v.Len() + reflect.Copy(v.Slice(i, l), v.Slice(i+1, l)) + v.Index(l - 1).Set(reflect.Zero(v.Type().Elem())) + v.SetLen(l - 1) + c.iter.step-- +} + +// InsertAfter inserts n after the current Node in its containing slice. +// If the current Node is not part of a slice, InsertAfter panics. +// Apply does not walk n. +func (c *Cursor) InsertAfter(n ast.Node) { + i := c.Index() + if i < 0 { + panic("InsertAfter node not contained in slice") + } + v := c.field() + v.Set(reflect.Append(v, reflect.Zero(v.Type().Elem()))) + l := v.Len() + reflect.Copy(v.Slice(i+2, l), v.Slice(i+1, l)) + v.Index(i + 1).Set(reflect.ValueOf(n)) + c.iter.step++ +} + +// InsertBefore inserts n before the current Node in its containing slice. +// If the current Node is not part of a slice, InsertBefore panics. +// Apply will not walk n. +func (c *Cursor) InsertBefore(n ast.Node) { + i := c.Index() + if i < 0 { + panic("InsertBefore node not contained in slice") + } + v := c.field() + v.Set(reflect.Append(v, reflect.Zero(v.Type().Elem()))) + l := v.Len() + reflect.Copy(v.Slice(i+1, l), v.Slice(i, l)) + v.Index(i).Set(reflect.ValueOf(n)) + c.iter.index++ +} + +// application carries all the shared data so we can pass it around cheaply. +type application struct { + pre, post ApplyFunc + cursor Cursor + iter iterator +} + +func (a *application) apply(parent ast.Node, name string, iter *iterator, n ast.Node) { + // convert typed nil into untyped nil + if v := reflect.ValueOf(n); v.Kind() == reflect.Pointer && v.IsNil() { + n = nil + } + + // avoid heap-allocating a new cursor for each apply call; reuse a.cursor instead + saved := a.cursor + a.cursor.parent = parent + a.cursor.name = name + a.cursor.iter = iter + a.cursor.node = n + + if a.pre != nil && !a.pre(&a.cursor) { + a.cursor = saved + return + } + + // walk children + // (the order of the cases matches the order of the corresponding node types in go/ast) + switch n := n.(type) { + case nil: + // nothing to do + + // Comments and fields + case *ast.Comment: + // nothing to do + + case *ast.CommentGroup: + if n != nil { + a.applyList(n, "List") + } + + case *ast.Field: + a.apply(n, "Doc", nil, n.Doc) + a.applyList(n, "Names") + a.apply(n, "Type", nil, n.Type) + a.apply(n, "Tag", nil, n.Tag) + a.apply(n, "Comment", nil, n.Comment) + + case *ast.FieldList: + a.applyList(n, "List") + + // Expressions + case *ast.BadExpr, *ast.Ident, *ast.BasicLit: + // nothing to do + + case *ast.Ellipsis: + a.apply(n, "Elt", nil, n.Elt) + + case *ast.FuncLit: + a.apply(n, "Type", nil, n.Type) + a.apply(n, "Body", nil, n.Body) + + case *ast.CompositeLit: + a.apply(n, "Type", nil, n.Type) + a.applyList(n, "Elts") + + case *ast.ParenExpr: + a.apply(n, "X", nil, n.X) + + case *ast.SelectorExpr: + a.apply(n, "X", nil, n.X) + a.apply(n, "Sel", nil, n.Sel) + + case *ast.IndexExpr: + a.apply(n, "X", nil, n.X) + a.apply(n, "Index", nil, n.Index) + + case *ast.IndexListExpr: + a.apply(n, "X", nil, n.X) + a.applyList(n, "Indices") + + case *ast.SliceExpr: + a.apply(n, "X", nil, n.X) + a.apply(n, "Low", nil, n.Low) + a.apply(n, "High", nil, n.High) + a.apply(n, "Max", nil, n.Max) + + case *ast.TypeAssertExpr: + a.apply(n, "X", nil, n.X) + a.apply(n, "Type", nil, n.Type) + + case *ast.CallExpr: + a.apply(n, "Fun", nil, n.Fun) + a.applyList(n, "Args") + + case *ast.StarExpr: + a.apply(n, "X", nil, n.X) + + case *ast.UnaryExpr: + a.apply(n, "X", nil, n.X) + + case *ast.BinaryExpr: + a.apply(n, "X", nil, n.X) + a.apply(n, "Y", nil, n.Y) + + case *ast.KeyValueExpr: + a.apply(n, "Key", nil, n.Key) + a.apply(n, "Value", nil, n.Value) + + // Types + case *ast.ArrayType: + a.apply(n, "Len", nil, n.Len) + a.apply(n, "Elt", nil, n.Elt) + + case *ast.StructType: + a.apply(n, "Fields", nil, n.Fields) + + case *ast.FuncType: + if tparams := n.TypeParams; tparams != nil { + a.apply(n, "TypeParams", nil, tparams) + } + a.apply(n, "Params", nil, n.Params) + a.apply(n, "Results", nil, n.Results) + + case *ast.InterfaceType: + a.apply(n, "Methods", nil, n.Methods) + + case *ast.MapType: + a.apply(n, "Key", nil, n.Key) + a.apply(n, "Value", nil, n.Value) + + case *ast.ChanType: + a.apply(n, "Value", nil, n.Value) + + // Statements + case *ast.BadStmt: + // nothing to do + + case *ast.DeclStmt: + a.apply(n, "Decl", nil, n.Decl) + + case *ast.EmptyStmt: + // nothing to do + + case *ast.LabeledStmt: + a.apply(n, "Label", nil, n.Label) + a.apply(n, "Stmt", nil, n.Stmt) + + case *ast.ExprStmt: + a.apply(n, "X", nil, n.X) + + case *ast.SendStmt: + a.apply(n, "Chan", nil, n.Chan) + a.apply(n, "Value", nil, n.Value) + + case *ast.IncDecStmt: + a.apply(n, "X", nil, n.X) + + case *ast.AssignStmt: + a.applyList(n, "Lhs") + a.applyList(n, "Rhs") + + case *ast.GoStmt: + a.apply(n, "Call", nil, n.Call) + + case *ast.DeferStmt: + a.apply(n, "Call", nil, n.Call) + + case *ast.ReturnStmt: + a.applyList(n, "Results") + + case *ast.BranchStmt: + a.apply(n, "Label", nil, n.Label) + + case *ast.BlockStmt: + a.applyList(n, "List") + + case *ast.IfStmt: + a.apply(n, "Init", nil, n.Init) + a.apply(n, "Cond", nil, n.Cond) + a.apply(n, "Body", nil, n.Body) + a.apply(n, "Else", nil, n.Else) + + case *ast.CaseClause: + a.applyList(n, "List") + a.applyList(n, "Body") + + case *ast.SwitchStmt: + a.apply(n, "Init", nil, n.Init) + a.apply(n, "Tag", nil, n.Tag) + a.apply(n, "Body", nil, n.Body) + + case *ast.TypeSwitchStmt: + a.apply(n, "Init", nil, n.Init) + a.apply(n, "Assign", nil, n.Assign) + a.apply(n, "Body", nil, n.Body) + + case *ast.CommClause: + a.apply(n, "Comm", nil, n.Comm) + a.applyList(n, "Body") + + case *ast.SelectStmt: + a.apply(n, "Body", nil, n.Body) + + case *ast.ForStmt: + a.apply(n, "Init", nil, n.Init) + a.apply(n, "Cond", nil, n.Cond) + a.apply(n, "Post", nil, n.Post) + a.apply(n, "Body", nil, n.Body) + + case *ast.RangeStmt: + a.apply(n, "Key", nil, n.Key) + a.apply(n, "Value", nil, n.Value) + a.apply(n, "X", nil, n.X) + a.apply(n, "Body", nil, n.Body) + + // Declarations + case *ast.ImportSpec: + a.apply(n, "Doc", nil, n.Doc) + a.apply(n, "Name", nil, n.Name) + a.apply(n, "Path", nil, n.Path) + a.apply(n, "Comment", nil, n.Comment) + + case *ast.ValueSpec: + a.apply(n, "Doc", nil, n.Doc) + a.applyList(n, "Names") + a.apply(n, "Type", nil, n.Type) + a.applyList(n, "Values") + a.apply(n, "Comment", nil, n.Comment) + + case *ast.TypeSpec: + a.apply(n, "Doc", nil, n.Doc) + a.apply(n, "Name", nil, n.Name) + if tparams := n.TypeParams; tparams != nil { + a.apply(n, "TypeParams", nil, tparams) + } + a.apply(n, "Type", nil, n.Type) + a.apply(n, "Comment", nil, n.Comment) + + case *ast.BadDecl: + // nothing to do + + case *ast.GenDecl: + a.apply(n, "Doc", nil, n.Doc) + a.applyList(n, "Specs") + + case *ast.FuncDecl: + a.apply(n, "Doc", nil, n.Doc) + a.apply(n, "Recv", nil, n.Recv) + a.apply(n, "Name", nil, n.Name) + a.apply(n, "Type", nil, n.Type) + a.apply(n, "Body", nil, n.Body) + + // Files and packages + case *ast.File: + a.apply(n, "Doc", nil, n.Doc) + a.apply(n, "Name", nil, n.Name) + a.applyList(n, "Decls") + // Don't walk n.Comments; they have either been walked already if + // they are Doc comments, or they can be easily walked explicitly. + + case *ast.Package: + // collect and sort names for reproducible behavior + var names []string + for name := range n.Files { + names = append(names, name) + } + sort.Strings(names) + for _, name := range names { + a.apply(n, name, nil, n.Files[name]) + } + + default: + panic(fmt.Sprintf("Apply: unexpected node type %T", n)) + } + + if a.post != nil && !a.post(&a.cursor) { + panic(abort) + } + + a.cursor = saved +} + +// An iterator controls iteration over a slice of nodes. +type iterator struct { + index, step int +} + +func (a *application) applyList(parent ast.Node, name string) { + // avoid heap-allocating a new iterator for each applyList call; reuse a.iter instead + saved := a.iter + a.iter.index = 0 + for { + // must reload parent.name each time, since cursor modifications might change it + v := reflect.Indirect(reflect.ValueOf(parent)).FieldByName(name) + if a.iter.index >= v.Len() { + break + } + + // element x may be nil in a bad AST - be cautious + var x ast.Node + if e := v.Index(a.iter.index); e.IsValid() { + x = e.Interface().(ast.Node) + } + + a.iter.step = 1 + a.apply(parent, name, &a.iter, x) + a.iter.index += a.iter.step + } + a.iter = saved +} diff --git a/backend/vendor/golang.org/x/tools/go/ast/astutil/util.go b/backend/vendor/golang.org/x/tools/go/ast/astutil/util.go new file mode 100644 index 0000000..c820b20 --- /dev/null +++ b/backend/vendor/golang.org/x/tools/go/ast/astutil/util.go @@ -0,0 +1,13 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package astutil + +import "go/ast" + +// Unparen returns e with any enclosing parentheses stripped. +// Deprecated: use [ast.Unparen]. +// +//go:fix inline +func Unparen(e ast.Expr) ast.Expr { return ast.Unparen(e) } diff --git a/backend/vendor/golang.org/x/tools/go/ast/edge/edge.go b/backend/vendor/golang.org/x/tools/go/ast/edge/edge.go new file mode 100644 index 0000000..4f6ccfd --- /dev/null +++ b/backend/vendor/golang.org/x/tools/go/ast/edge/edge.go @@ -0,0 +1,295 @@ +// Copyright 2025 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package edge defines identifiers for each field of an ast.Node +// struct type that refers to another Node. +package edge + +import ( + "fmt" + "go/ast" + "reflect" +) + +// A Kind describes a field of an ast.Node struct. +type Kind uint8 + +// String returns a description of the edge kind. +func (k Kind) String() string { + if k == Invalid { + return "" + } + info := fieldInfos[k] + return fmt.Sprintf("%v.%s", info.nodeType.Elem().Name(), info.name) +} + +// NodeType returns the pointer-to-struct type of the ast.Node implementation. +func (k Kind) NodeType() reflect.Type { return fieldInfos[k].nodeType } + +// FieldName returns the name of the field. +func (k Kind) FieldName() string { return fieldInfos[k].name } + +// FieldType returns the declared type of the field. +func (k Kind) FieldType() reflect.Type { return fieldInfos[k].fieldType } + +// Get returns the direct child of n identified by (k, idx). +// n's type must match k.NodeType(). +// idx must be a valid slice index, or -1 for a non-slice. +func (k Kind) Get(n ast.Node, idx int) ast.Node { + if k.NodeType() != reflect.TypeOf(n) { + panic(fmt.Sprintf("%v.Get(%T): invalid node type", k, n)) + } + v := reflect.ValueOf(n).Elem().Field(fieldInfos[k].index) + if idx != -1 { + v = v.Index(idx) // asserts valid index + } else { + // (The type assertion below asserts that v is not a slice.) + } + return v.Interface().(ast.Node) // may be nil +} + +const ( + Invalid Kind = iota // for nodes at the root of the traversal + + // Kinds are sorted alphabetically. + // Numbering is not stable. + // Each is named Type_Field, where Type is the + // ast.Node struct type and Field is the name of the field + + ArrayType_Elt + ArrayType_Len + AssignStmt_Lhs + AssignStmt_Rhs + BinaryExpr_X + BinaryExpr_Y + BlockStmt_List + BranchStmt_Label + CallExpr_Args + CallExpr_Fun + CaseClause_Body + CaseClause_List + ChanType_Value + CommClause_Body + CommClause_Comm + CommentGroup_List + CompositeLit_Elts + CompositeLit_Type + DeclStmt_Decl + DeferStmt_Call + Ellipsis_Elt + ExprStmt_X + FieldList_List + Field_Comment + Field_Doc + Field_Names + Field_Tag + Field_Type + File_Decls + File_Doc + File_Name + ForStmt_Body + ForStmt_Cond + ForStmt_Init + ForStmt_Post + FuncDecl_Body + FuncDecl_Doc + FuncDecl_Name + FuncDecl_Recv + FuncDecl_Type + FuncLit_Body + FuncLit_Type + FuncType_Params + FuncType_Results + FuncType_TypeParams + GenDecl_Doc + GenDecl_Specs + GoStmt_Call + IfStmt_Body + IfStmt_Cond + IfStmt_Else + IfStmt_Init + ImportSpec_Comment + ImportSpec_Doc + ImportSpec_Name + ImportSpec_Path + IncDecStmt_X + IndexExpr_Index + IndexExpr_X + IndexListExpr_Indices + IndexListExpr_X + InterfaceType_Methods + KeyValueExpr_Key + KeyValueExpr_Value + LabeledStmt_Label + LabeledStmt_Stmt + MapType_Key + MapType_Value + ParenExpr_X + RangeStmt_Body + RangeStmt_Key + RangeStmt_Value + RangeStmt_X + ReturnStmt_Results + SelectStmt_Body + SelectorExpr_Sel + SelectorExpr_X + SendStmt_Chan + SendStmt_Value + SliceExpr_High + SliceExpr_Low + SliceExpr_Max + SliceExpr_X + StarExpr_X + StructType_Fields + SwitchStmt_Body + SwitchStmt_Init + SwitchStmt_Tag + TypeAssertExpr_Type + TypeAssertExpr_X + TypeSpec_Comment + TypeSpec_Doc + TypeSpec_Name + TypeSpec_Type + TypeSpec_TypeParams + TypeSwitchStmt_Assign + TypeSwitchStmt_Body + TypeSwitchStmt_Init + UnaryExpr_X + ValueSpec_Comment + ValueSpec_Doc + ValueSpec_Names + ValueSpec_Type + ValueSpec_Values + + maxKind +) + +// Assert that the encoding fits in 7 bits, +// as the inspector relies on this. +// (We are currently at 104.) +var _ = [1 << 7]struct{}{}[maxKind] + +type fieldInfo struct { + nodeType reflect.Type // pointer-to-struct type of ast.Node implementation + name string + index int + fieldType reflect.Type +} + +func info[N ast.Node](fieldName string) fieldInfo { + nodePtrType := reflect.TypeFor[N]() + f, ok := nodePtrType.Elem().FieldByName(fieldName) + if !ok { + panic(fieldName) + } + return fieldInfo{nodePtrType, fieldName, f.Index[0], f.Type} +} + +var fieldInfos = [...]fieldInfo{ + Invalid: {}, + ArrayType_Elt: info[*ast.ArrayType]("Elt"), + ArrayType_Len: info[*ast.ArrayType]("Len"), + AssignStmt_Lhs: info[*ast.AssignStmt]("Lhs"), + AssignStmt_Rhs: info[*ast.AssignStmt]("Rhs"), + BinaryExpr_X: info[*ast.BinaryExpr]("X"), + BinaryExpr_Y: info[*ast.BinaryExpr]("Y"), + BlockStmt_List: info[*ast.BlockStmt]("List"), + BranchStmt_Label: info[*ast.BranchStmt]("Label"), + CallExpr_Args: info[*ast.CallExpr]("Args"), + CallExpr_Fun: info[*ast.CallExpr]("Fun"), + CaseClause_Body: info[*ast.CaseClause]("Body"), + CaseClause_List: info[*ast.CaseClause]("List"), + ChanType_Value: info[*ast.ChanType]("Value"), + CommClause_Body: info[*ast.CommClause]("Body"), + CommClause_Comm: info[*ast.CommClause]("Comm"), + CommentGroup_List: info[*ast.CommentGroup]("List"), + CompositeLit_Elts: info[*ast.CompositeLit]("Elts"), + CompositeLit_Type: info[*ast.CompositeLit]("Type"), + DeclStmt_Decl: info[*ast.DeclStmt]("Decl"), + DeferStmt_Call: info[*ast.DeferStmt]("Call"), + Ellipsis_Elt: info[*ast.Ellipsis]("Elt"), + ExprStmt_X: info[*ast.ExprStmt]("X"), + FieldList_List: info[*ast.FieldList]("List"), + Field_Comment: info[*ast.Field]("Comment"), + Field_Doc: info[*ast.Field]("Doc"), + Field_Names: info[*ast.Field]("Names"), + Field_Tag: info[*ast.Field]("Tag"), + Field_Type: info[*ast.Field]("Type"), + File_Decls: info[*ast.File]("Decls"), + File_Doc: info[*ast.File]("Doc"), + File_Name: info[*ast.File]("Name"), + ForStmt_Body: info[*ast.ForStmt]("Body"), + ForStmt_Cond: info[*ast.ForStmt]("Cond"), + ForStmt_Init: info[*ast.ForStmt]("Init"), + ForStmt_Post: info[*ast.ForStmt]("Post"), + FuncDecl_Body: info[*ast.FuncDecl]("Body"), + FuncDecl_Doc: info[*ast.FuncDecl]("Doc"), + FuncDecl_Name: info[*ast.FuncDecl]("Name"), + FuncDecl_Recv: info[*ast.FuncDecl]("Recv"), + FuncDecl_Type: info[*ast.FuncDecl]("Type"), + FuncLit_Body: info[*ast.FuncLit]("Body"), + FuncLit_Type: info[*ast.FuncLit]("Type"), + FuncType_Params: info[*ast.FuncType]("Params"), + FuncType_Results: info[*ast.FuncType]("Results"), + FuncType_TypeParams: info[*ast.FuncType]("TypeParams"), + GenDecl_Doc: info[*ast.GenDecl]("Doc"), + GenDecl_Specs: info[*ast.GenDecl]("Specs"), + GoStmt_Call: info[*ast.GoStmt]("Call"), + IfStmt_Body: info[*ast.IfStmt]("Body"), + IfStmt_Cond: info[*ast.IfStmt]("Cond"), + IfStmt_Else: info[*ast.IfStmt]("Else"), + IfStmt_Init: info[*ast.IfStmt]("Init"), + ImportSpec_Comment: info[*ast.ImportSpec]("Comment"), + ImportSpec_Doc: info[*ast.ImportSpec]("Doc"), + ImportSpec_Name: info[*ast.ImportSpec]("Name"), + ImportSpec_Path: info[*ast.ImportSpec]("Path"), + IncDecStmt_X: info[*ast.IncDecStmt]("X"), + IndexExpr_Index: info[*ast.IndexExpr]("Index"), + IndexExpr_X: info[*ast.IndexExpr]("X"), + IndexListExpr_Indices: info[*ast.IndexListExpr]("Indices"), + IndexListExpr_X: info[*ast.IndexListExpr]("X"), + InterfaceType_Methods: info[*ast.InterfaceType]("Methods"), + KeyValueExpr_Key: info[*ast.KeyValueExpr]("Key"), + KeyValueExpr_Value: info[*ast.KeyValueExpr]("Value"), + LabeledStmt_Label: info[*ast.LabeledStmt]("Label"), + LabeledStmt_Stmt: info[*ast.LabeledStmt]("Stmt"), + MapType_Key: info[*ast.MapType]("Key"), + MapType_Value: info[*ast.MapType]("Value"), + ParenExpr_X: info[*ast.ParenExpr]("X"), + RangeStmt_Body: info[*ast.RangeStmt]("Body"), + RangeStmt_Key: info[*ast.RangeStmt]("Key"), + RangeStmt_Value: info[*ast.RangeStmt]("Value"), + RangeStmt_X: info[*ast.RangeStmt]("X"), + ReturnStmt_Results: info[*ast.ReturnStmt]("Results"), + SelectStmt_Body: info[*ast.SelectStmt]("Body"), + SelectorExpr_Sel: info[*ast.SelectorExpr]("Sel"), + SelectorExpr_X: info[*ast.SelectorExpr]("X"), + SendStmt_Chan: info[*ast.SendStmt]("Chan"), + SendStmt_Value: info[*ast.SendStmt]("Value"), + SliceExpr_High: info[*ast.SliceExpr]("High"), + SliceExpr_Low: info[*ast.SliceExpr]("Low"), + SliceExpr_Max: info[*ast.SliceExpr]("Max"), + SliceExpr_X: info[*ast.SliceExpr]("X"), + StarExpr_X: info[*ast.StarExpr]("X"), + StructType_Fields: info[*ast.StructType]("Fields"), + SwitchStmt_Body: info[*ast.SwitchStmt]("Body"), + SwitchStmt_Init: info[*ast.SwitchStmt]("Init"), + SwitchStmt_Tag: info[*ast.SwitchStmt]("Tag"), + TypeAssertExpr_Type: info[*ast.TypeAssertExpr]("Type"), + TypeAssertExpr_X: info[*ast.TypeAssertExpr]("X"), + TypeSpec_Comment: info[*ast.TypeSpec]("Comment"), + TypeSpec_Doc: info[*ast.TypeSpec]("Doc"), + TypeSpec_Name: info[*ast.TypeSpec]("Name"), + TypeSpec_Type: info[*ast.TypeSpec]("Type"), + TypeSpec_TypeParams: info[*ast.TypeSpec]("TypeParams"), + TypeSwitchStmt_Assign: info[*ast.TypeSwitchStmt]("Assign"), + TypeSwitchStmt_Body: info[*ast.TypeSwitchStmt]("Body"), + TypeSwitchStmt_Init: info[*ast.TypeSwitchStmt]("Init"), + UnaryExpr_X: info[*ast.UnaryExpr]("X"), + ValueSpec_Comment: info[*ast.ValueSpec]("Comment"), + ValueSpec_Doc: info[*ast.ValueSpec]("Doc"), + ValueSpec_Names: info[*ast.ValueSpec]("Names"), + ValueSpec_Type: info[*ast.ValueSpec]("Type"), + ValueSpec_Values: info[*ast.ValueSpec]("Values"), +} diff --git a/backend/vendor/golang.org/x/tools/go/ast/inspector/cursor.go b/backend/vendor/golang.org/x/tools/go/ast/inspector/cursor.go new file mode 100644 index 0000000..7e72d3c --- /dev/null +++ b/backend/vendor/golang.org/x/tools/go/ast/inspector/cursor.go @@ -0,0 +1,502 @@ +// Copyright 2025 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package inspector + +import ( + "fmt" + "go/ast" + "go/token" + "iter" + "reflect" + + "golang.org/x/tools/go/ast/edge" +) + +// A Cursor represents an [ast.Node]. It is immutable. +// +// Two Cursors compare equal if they represent the same node. +// +// Call [Inspector.Root] to obtain a valid cursor for the virtual root +// node of the traversal. +// +// Use the following methods to navigate efficiently around the tree: +// - for ancestors, use [Cursor.Parent] and [Cursor.Enclosing]; +// - for children, use [Cursor.Child], [Cursor.Children], +// [Cursor.FirstChild], and [Cursor.LastChild]; +// - for siblings, use [Cursor.PrevSibling] and [Cursor.NextSibling]; +// - for descendants, use [Cursor.FindByPos], [Cursor.FindNode], +// [Cursor.Inspect], and [Cursor.Preorder]. +// +// Use the [Cursor.ChildAt] and [Cursor.ParentEdge] methods for +// information about the edges in a tree: which field (and slice +// element) of the parent node holds the child. +type Cursor struct { + in *Inspector + index int32 // index of push node; -1 for virtual root node +} + +// Root returns a cursor for the virtual root node, +// whose children are the files provided to [New]. +// +// Its [Cursor.Node] method return nil. +func (in *Inspector) Root() Cursor { + return Cursor{in, -1} +} + +// At returns the cursor at the specified index in the traversal, +// which must have been obtained from [Cursor.Index] on a Cursor +// belonging to the same Inspector (see [Cursor.Inspector]). +func (in *Inspector) At(index int32) Cursor { + if index < 0 { + panic("negative index") + } + if int(index) >= len(in.events) { + panic("index out of range for this inspector") + } + if in.events[index].index < index { + panic("invalid index") // (a push, not a pop) + } + return Cursor{in, index} +} + +// Inspector returns the cursor's Inspector. +func (c Cursor) Inspector() *Inspector { return c.in } + +// Index returns the index of this cursor position within the package. +// +// Clients should not assume anything about the numeric Index value +// except that it increases monotonically throughout the traversal. +// It is provided for use with [At]. +// +// Index must not be called on the Root node. +func (c Cursor) Index() int32 { + if c.index < 0 { + panic("Index called on Root node") + } + return c.index +} + +// Node returns the node at the current cursor position, +// or nil for the cursor returned by [Inspector.Root]. +func (c Cursor) Node() ast.Node { + if c.index < 0 { + return nil + } + return c.in.events[c.index].node +} + +// String returns information about the cursor's node, if any. +func (c Cursor) String() string { + if c.in == nil { + return "(invalid)" + } + if c.index < 0 { + return "(root)" + } + return reflect.TypeOf(c.Node()).String() +} + +// indices return the [start, end) half-open interval of event indices. +func (c Cursor) indices() (int32, int32) { + if c.index < 0 { + return 0, int32(len(c.in.events)) // root: all events + } else { + return c.index, c.in.events[c.index].index + 1 // just one subtree + } +} + +// Preorder returns an iterator over the nodes of the subtree +// represented by c in depth-first order. Each node in the sequence is +// represented by a Cursor that allows access to the Node, but may +// also be used to start a new traversal, or to obtain the stack of +// nodes enclosing the cursor. +// +// The traversal sequence is determined by [ast.Inspect]. The types +// argument, if non-empty, enables type-based filtering of events. The +// function f if is called only for nodes whose type matches an +// element of the types slice. +// +// If you need control over descent into subtrees, +// or need both pre- and post-order notifications, use [Cursor.Inspect] +func (c Cursor) Preorder(types ...ast.Node) iter.Seq[Cursor] { + mask := maskOf(types) + + return func(yield func(Cursor) bool) { + events := c.in.events + + for i, limit := c.indices(); i < limit; { + ev := events[i] + if ev.index > i { // push? + if ev.typ&mask != 0 && !yield(Cursor{c.in, i}) { + break + } + pop := ev.index + if events[pop].typ&mask == 0 { + // Subtree does not contain types: skip. + i = pop + 1 + continue + } + } + i++ + } + } +} + +// Inspect visits the nodes of the subtree represented by c in +// depth-first order. It calls f(n) for each node n before it +// visits n's children. If f returns true, Inspect invokes f +// recursively for each of the non-nil children of the node. +// +// Each node is represented by a Cursor that allows access to the +// Node, but may also be used to start a new traversal, or to obtain +// the stack of nodes enclosing the cursor. +// +// The complete traversal sequence is determined by [ast.Inspect]. +// The types argument, if non-empty, enables type-based filtering of +// events. The function f if is called only for nodes whose type +// matches an element of the types slice. +func (c Cursor) Inspect(types []ast.Node, f func(c Cursor) (descend bool)) { + mask := maskOf(types) + events := c.in.events + for i, limit := c.indices(); i < limit; { + ev := events[i] + if ev.index > i { + // push + pop := ev.index + if ev.typ&mask != 0 && !f(Cursor{c.in, i}) || + events[pop].typ&mask == 0 { + // The user opted not to descend, or the + // subtree does not contain types: + // skip past the pop. + i = pop + 1 + continue + } + } + i++ + } +} + +// Enclosing returns an iterator over the nodes enclosing the current +// current node, starting with the Cursor itself. +// +// Enclosing must not be called on the Root node (whose [Cursor.Node] returns nil). +// +// The types argument, if non-empty, enables type-based filtering of +// events: the sequence includes only enclosing nodes whose type +// matches an element of the types slice. +func (c Cursor) Enclosing(types ...ast.Node) iter.Seq[Cursor] { + if c.index < 0 { + panic("Cursor.Enclosing called on Root node") + } + + mask := maskOf(types) + + return func(yield func(Cursor) bool) { + events := c.in.events + for i := c.index; i >= 0; i = events[i].parent { + if events[i].typ&mask != 0 && !yield(Cursor{c.in, i}) { + break + } + } + } +} + +// Parent returns the parent of the current node. +// +// Parent must not be called on the Root node (whose [Cursor.Node] returns nil). +func (c Cursor) Parent() Cursor { + if c.index < 0 { + panic("Cursor.Parent called on Root node") + } + + return Cursor{c.in, c.in.events[c.index].parent} +} + +// ParentEdge returns the identity of the field in the parent node +// that holds this cursor's node, and if it is a list, the index within it. +// +// For example, f(x, y) is a CallExpr whose three children are Idents. +// f has edge kind [edge.CallExpr_Fun] and index -1. +// x and y have kind [edge.CallExpr_Args] and indices 0 and 1, respectively. +// +// If called on a child of the Root node, it returns ([edge.Invalid], -1). +// +// ParentEdge must not be called on the Root node (whose [Cursor.Node] returns nil). +func (c Cursor) ParentEdge() (edge.Kind, int) { + if c.index < 0 { + panic("Cursor.ParentEdge called on Root node") + } + events := c.in.events + pop := events[c.index].index + return unpackEdgeKindAndIndex(events[pop].parent) +} + +// ChildAt returns the cursor for the child of the +// current node identified by its edge and index. +// The index must be -1 if the edge.Kind is not a slice. +// The indicated child node must exist. +// +// ChildAt must not be called on the Root node (whose [Cursor.Node] returns nil). +// +// Invariant: c.Parent().ChildAt(c.ParentEdge()) == c. +func (c Cursor) ChildAt(k edge.Kind, idx int) Cursor { + target := packEdgeKindAndIndex(k, idx) + + // Unfortunately there's no shortcut to looping. + events := c.in.events + i := c.index + 1 + for { + pop := events[i].index + if pop < i { + break + } + if events[pop].parent == target { + return Cursor{c.in, i} + } + i = pop + 1 + } + panic(fmt.Sprintf("ChildAt(%v, %d): no such child of %v", k, idx, c)) +} + +// Child returns the cursor for n, which must be a direct child of c's Node. +// +// Child must not be called on the Root node (whose [Cursor.Node] returns nil). +func (c Cursor) Child(n ast.Node) Cursor { + if c.index < 0 { + panic("Cursor.Child called on Root node") + } + + if false { + // reference implementation + for child := range c.Children() { + if child.Node() == n { + return child + } + } + + } else { + // optimized implementation + events := c.in.events + for i := c.index + 1; events[i].index > i; i = events[i].index + 1 { + if events[i].node == n { + return Cursor{c.in, i} + } + } + } + panic(fmt.Sprintf("Child(%T): not a child of %v", n, c)) +} + +// NextSibling returns the cursor for the next sibling node in the same list +// (for example, of files, decls, specs, statements, fields, or expressions) as +// the current node. It returns (zero, false) if the node is the last node in +// the list, or is not part of a list. +// +// NextSibling must not be called on the Root node. +// +// See note at [Cursor.Children]. +func (c Cursor) NextSibling() (Cursor, bool) { + if c.index < 0 { + panic("Cursor.NextSibling called on Root node") + } + + events := c.in.events + i := events[c.index].index + 1 // after corresponding pop + if i < int32(len(events)) { + if events[i].index > i { // push? + return Cursor{c.in, i}, true + } + } + return Cursor{}, false +} + +// PrevSibling returns the cursor for the previous sibling node in the +// same list (for example, of files, decls, specs, statements, fields, +// or expressions) as the current node. It returns zero if the node is +// the first node in the list, or is not part of a list. +// +// It must not be called on the Root node. +// +// See note at [Cursor.Children]. +func (c Cursor) PrevSibling() (Cursor, bool) { + if c.index < 0 { + panic("Cursor.PrevSibling called on Root node") + } + + events := c.in.events + i := c.index - 1 + if i >= 0 { + if j := events[i].index; j < i { // pop? + return Cursor{c.in, j}, true + } + } + return Cursor{}, false +} + +// FirstChild returns the first direct child of the current node, +// or zero if it has no children. +func (c Cursor) FirstChild() (Cursor, bool) { + events := c.in.events + i := c.index + 1 // i=0 if c is root + if i < int32(len(events)) && events[i].index > i { // push? + return Cursor{c.in, i}, true + } + return Cursor{}, false +} + +// LastChild returns the last direct child of the current node, +// or zero if it has no children. +func (c Cursor) LastChild() (Cursor, bool) { + events := c.in.events + if c.index < 0 { // root? + if len(events) > 0 { + // return push of final event (a pop) + return Cursor{c.in, events[len(events)-1].index}, true + } + } else { + j := events[c.index].index - 1 // before corresponding pop + // Inv: j == c.index if c has no children + // or j is last child's pop. + if j > c.index { // c has children + return Cursor{c.in, events[j].index}, true + } + } + return Cursor{}, false +} + +// Children returns an iterator over the direct children of the +// current node, if any. +// +// When using Children, NextChild, and PrevChild, bear in mind that a +// Node's children may come from different fields, some of which may +// be lists of nodes without a distinguished intervening container +// such as [ast.BlockStmt]. +// +// For example, [ast.CaseClause] has a field List of expressions and a +// field Body of statements, so the children of a CaseClause are a mix +// of expressions and statements. Other nodes that have "uncontained" +// list fields include: +// +// - [ast.ValueSpec] (Names, Values) +// - [ast.CompositeLit] (Type, Elts) +// - [ast.IndexListExpr] (X, Indices) +// - [ast.CallExpr] (Fun, Args) +// - [ast.AssignStmt] (Lhs, Rhs) +// +// So, do not assume that the previous sibling of an ast.Stmt is also +// an ast.Stmt, or if it is, that they are executed sequentially, +// unless you have established that, say, its parent is a BlockStmt +// or its [Cursor.ParentEdge] is [edge.BlockStmt_List]. +// For example, given "for S1; ; S2 {}", the predecessor of S2 is S1, +// even though they are not executed in sequence. +func (c Cursor) Children() iter.Seq[Cursor] { + return func(yield func(Cursor) bool) { + c, ok := c.FirstChild() + for ok && yield(c) { + c, ok = c.NextSibling() + } + } +} + +// Contains reports whether c contains or is equal to c2. +// +// Both Cursors must belong to the same [Inspector]; +// neither may be its Root node. +func (c Cursor) Contains(c2 Cursor) bool { + if c.in != c2.in { + panic("different inspectors") + } + events := c.in.events + return c.index <= c2.index && events[c2.index].index <= events[c.index].index +} + +// FindNode returns the cursor for node n if it belongs to the subtree +// rooted at c. It returns zero if n is not found. +func (c Cursor) FindNode(n ast.Node) (Cursor, bool) { + + // FindNode is equivalent to this code, + // but more convenient and 15-20% faster: + if false { + for candidate := range c.Preorder(n) { + if candidate.Node() == n { + return candidate, true + } + } + return Cursor{}, false + } + + // TODO(adonovan): opt: should we assume Node.Pos is accurate + // and combine type-based filtering with position filtering + // like FindByPos? + + mask := maskOf([]ast.Node{n}) + events := c.in.events + + for i, limit := c.indices(); i < limit; i++ { + ev := events[i] + if ev.index > i { // push? + if ev.typ&mask != 0 && ev.node == n { + return Cursor{c.in, i}, true + } + pop := ev.index + if events[pop].typ&mask == 0 { + // Subtree does not contain type of n: skip. + i = pop + } + } + } + return Cursor{}, false +} + +// FindByPos returns the cursor for the innermost node n in the tree +// rooted at c such that n.Pos() <= start && end <= n.End(). +// (For an *ast.File, it uses the bounds n.FileStart-n.FileEnd.) +// +// It returns zero if none is found. +// Precondition: start <= end. +// +// See also [astutil.PathEnclosingInterval], which +// tolerates adjoining whitespace. +func (c Cursor) FindByPos(start, end token.Pos) (Cursor, bool) { + if end < start { + panic("end < start") + } + events := c.in.events + + // This algorithm could be implemented using c.Inspect, + // but it is about 2.5x slower. + + best := int32(-1) // push index of latest (=innermost) node containing range + for i, limit := c.indices(); i < limit; i++ { + ev := events[i] + if ev.index > i { // push? + n := ev.node + var nodeEnd token.Pos + if file, ok := n.(*ast.File); ok { + nodeEnd = file.FileEnd + // Note: files may be out of Pos order. + if file.FileStart > start { + i = ev.index // disjoint, after; skip to next file + continue + } + } else { + nodeEnd = n.End() + if n.Pos() > start { + break // disjoint, after; stop + } + } + // Inv: node.{Pos,FileStart} <= start + if end <= nodeEnd { + // node fully contains target range + best = i + } else if nodeEnd < start { + i = ev.index // disjoint, before; skip forward + } + } + } + if best >= 0 { + return Cursor{c.in, best}, true + } + return Cursor{}, false +} diff --git a/backend/vendor/golang.org/x/tools/go/ast/inspector/inspector.go b/backend/vendor/golang.org/x/tools/go/ast/inspector/inspector.go new file mode 100644 index 0000000..a703cdf --- /dev/null +++ b/backend/vendor/golang.org/x/tools/go/ast/inspector/inspector.go @@ -0,0 +1,311 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package inspector provides helper functions for traversal over the +// syntax trees of a package, including node filtering by type, and +// materialization of the traversal stack. +// +// During construction, the inspector does a complete traversal and +// builds a list of push/pop events and their node type. Subsequent +// method calls that request a traversal scan this list, rather than walk +// the AST, and perform type filtering using efficient bit sets. +// This representation is sometimes called a "balanced parenthesis tree." +// +// Experiments suggest the inspector's traversals are about 2.5x faster +// than [ast.Inspect], but it may take around 5 traversals for this +// benefit to amortize the inspector's construction cost. +// If efficiency is the primary concern, do not use Inspector for +// one-off traversals. +// +// The [Cursor] type provides a more flexible API for efficient +// navigation of syntax trees in all four "cardinal directions". For +// example, traversals may be nested, so you can find each node of +// type A and then search within it for nodes of type B. Or you can +// traverse from a node to its immediate neighbors: its parent, its +// previous and next sibling, or its first and last child. We +// recommend using methods of Cursor in preference to Inspector where +// possible. +package inspector + +// There are four orthogonal features in a traversal: +// 1 type filtering +// 2 pruning +// 3 postorder calls to f +// 4 stack +// Rather than offer all of them in the API, +// only a few combinations are exposed: +// - Preorder is the fastest and has fewest features, +// but is the most commonly needed traversal. +// - Nodes and WithStack both provide pruning and postorder calls, +// even though few clients need it, because supporting two versions +// is not justified. +// More combinations could be supported by expressing them as +// wrappers around a more generic traversal, but this was measured +// and found to degrade performance significantly (30%). + +import ( + "go/ast" + + "golang.org/x/tools/go/ast/edge" +) + +// An Inspector provides methods for inspecting +// (traversing) the syntax trees of a package. +type Inspector struct { + events []event +} + +func packEdgeKindAndIndex(ek edge.Kind, index int) int32 { + return int32(uint32(index+1)<<7 | uint32(ek)) +} + +// unpackEdgeKindAndIndex unpacks the edge kind and edge index (within +// an []ast.Node slice) from the parent field of a pop event. +func unpackEdgeKindAndIndex(x int32) (edge.Kind, int) { + // The "parent" field of a pop node holds the + // edge Kind in the lower 7 bits and the index+1 + // in the upper 25. + return edge.Kind(x & 0x7f), int(x>>7) - 1 +} + +// New returns an Inspector for the specified syntax trees. +func New(files []*ast.File) *Inspector { + return &Inspector{traverse(files)} +} + +// An event represents a push or a pop +// of an ast.Node during a traversal. +type event struct { + node ast.Node + typ uint64 // typeOf(node) on push event, or union of typ strictly between push and pop events on pop events + index int32 // index of corresponding push or pop event + parent int32 // index of parent's push node (push nodes only), or packed edge kind/index (pop nodes only) +} + +// TODO: Experiment with storing only the second word of event.node (unsafe.Pointer). +// Type can be recovered from the sole bit in typ. +// [Tried this, wasn't faster. --adonovan] + +// Preorder visits all the nodes of the files supplied to New in +// depth-first order. It calls f(n) for each node n before it visits +// n's children. +// +// The complete traversal sequence is determined by [ast.Inspect]. +// The types argument, if non-empty, enables type-based filtering of +// events. The function f is called only for nodes whose type +// matches an element of the types slice. +// +// The [Cursor.Preorder] method provides a richer alternative interface. +// Example: +// +// for c := range in.Root().Preorder(types) { ... } +func (in *Inspector) Preorder(types []ast.Node, f func(ast.Node)) { + // Because it avoids postorder calls to f, and the pruning + // check, Preorder is almost twice as fast as Nodes. The two + // features seem to contribute similar slowdowns (~1.4x each). + + // This function is equivalent to the PreorderSeq call below, + // but to avoid the additional dynamic call (which adds 13-35% + // to the benchmarks), we expand it out. + // + // in.PreorderSeq(types...)(func(n ast.Node) bool { + // f(n) + // return true + // }) + + mask := maskOf(types) + for i := int32(0); i < int32(len(in.events)); { + ev := in.events[i] + if ev.index > i { + // push + if ev.typ&mask != 0 { + f(ev.node) + } + pop := ev.index + if in.events[pop].typ&mask == 0 { + // Subtrees do not contain types: skip them and pop. + i = pop + 1 + continue + } + } + i++ + } +} + +// Nodes visits the nodes of the files supplied to New in depth-first +// order. It calls f(n, true) for each node n before it visits n's +// children. If f returns true, Nodes invokes f recursively for each +// of the non-nil children of the node, followed by a call of +// f(n, false). +// +// The complete traversal sequence is determined by [ast.Inspect]. +// The types argument, if non-empty, enables type-based filtering of +// events. The function f if is called only for nodes whose type +// matches an element of the types slice. +// +// The [Cursor.Inspect] method provides a richer alternative interface. +// Example: +// +// in.Root().Inspect(types, func(c Cursor) bool { +// ... +// return true +// } +func (in *Inspector) Nodes(types []ast.Node, f func(n ast.Node, push bool) (proceed bool)) { + mask := maskOf(types) + for i := int32(0); i < int32(len(in.events)); { + ev := in.events[i] + if ev.index > i { + // push + pop := ev.index + if ev.typ&mask != 0 { + if !f(ev.node, true) { + i = pop + 1 // jump to corresponding pop + 1 + continue + } + } + if in.events[pop].typ&mask == 0 { + // Subtrees do not contain types: skip them. + i = pop + continue + } + } else { + // pop + push := ev.index + if in.events[push].typ&mask != 0 { + f(ev.node, false) + } + } + i++ + } +} + +// WithStack visits nodes in a similar manner to Nodes, but it +// supplies each call to f an additional argument, the current +// traversal stack. The stack's first element is the outermost node, +// an *ast.File; its last is the innermost, n. +// +// The [Cursor.Inspect] method provides a richer alternative interface. +// Example: +// +// in.Root().Inspect(types, func(c Cursor) bool { +// stack := slices.Collect(c.Enclosing()) +// ... +// return true +// }) +func (in *Inspector) WithStack(types []ast.Node, f func(n ast.Node, push bool, stack []ast.Node) (proceed bool)) { + mask := maskOf(types) + var stack []ast.Node + for i := int32(0); i < int32(len(in.events)); { + ev := in.events[i] + if ev.index > i { + // push + pop := ev.index + stack = append(stack, ev.node) + if ev.typ&mask != 0 { + if !f(ev.node, true, stack) { + i = pop + 1 + stack = stack[:len(stack)-1] + continue + } + } + if in.events[pop].typ&mask == 0 { + // Subtrees does not contain types: skip them. + i = pop + continue + } + } else { + // pop + push := ev.index + if in.events[push].typ&mask != 0 { + f(ev.node, false, stack) + } + stack = stack[:len(stack)-1] + } + i++ + } +} + +// traverse builds the table of events representing a traversal. +func traverse(files []*ast.File) []event { + // Preallocate approximate number of events + // based on source file extent of the declarations. + // (We use End-Pos not FileStart-FileEnd to neglect + // the effect of long doc comments.) + // This makes traverse faster by 4x (!). + var extent int + for _, f := range files { + extent += int(f.End() - f.Pos()) + } + // This estimate is based on the net/http package. + capacity := min(extent*33/100, 1e6) // impose some reasonable maximum (1M) + + v := &visitor{ + events: make([]event, 0, capacity), + stack: []item{{index: -1}}, // include an extra event so file nodes have a parent + } + for _, file := range files { + walk(v, edge.Invalid, -1, file) + } + return v.events +} + +type visitor struct { + events []event + stack []item +} + +type item struct { + index int32 // index of current node's push event + parentIndex int32 // index of parent node's push event + typAccum uint64 // accumulated type bits of current node's descendants + edgeKindAndIndex int32 // edge.Kind and index, bit packed +} + +func (v *visitor) push(ek edge.Kind, eindex int, node ast.Node) { + var ( + index = int32(len(v.events)) + parentIndex = v.stack[len(v.stack)-1].index + ) + v.events = append(v.events, event{ + node: node, + parent: parentIndex, + typ: typeOf(node), + index: 0, // (pop index is set later by visitor.pop) + }) + v.stack = append(v.stack, item{ + index: index, + parentIndex: parentIndex, + edgeKindAndIndex: packEdgeKindAndIndex(ek, eindex), + }) + + // 2B nodes ought to be enough for anyone! + if int32(len(v.events)) < 0 { + panic("event index exceeded int32") + } + + // 32M elements in an []ast.Node ought to be enough for anyone! + if ek2, eindex2 := unpackEdgeKindAndIndex(packEdgeKindAndIndex(ek, eindex)); ek2 != ek || eindex2 != eindex { + panic("Node slice index exceeded uint25") + } +} + +func (v *visitor) pop(node ast.Node) { + top := len(v.stack) - 1 + current := v.stack[top] + + push := &v.events[current.index] + parent := &v.stack[top-1] + + push.index = int32(len(v.events)) // make push event refer to pop + parent.typAccum |= current.typAccum | push.typ // accumulate type bits into parent + + v.stack = v.stack[:top] + + v.events = append(v.events, event{ + node: node, + typ: current.typAccum, + index: current.index, + parent: current.edgeKindAndIndex, // see [unpackEdgeKindAndIndex] + }) +} diff --git a/backend/vendor/golang.org/x/tools/go/ast/inspector/iter.go b/backend/vendor/golang.org/x/tools/go/ast/inspector/iter.go new file mode 100644 index 0000000..c576dc7 --- /dev/null +++ b/backend/vendor/golang.org/x/tools/go/ast/inspector/iter.go @@ -0,0 +1,85 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build go1.23 + +package inspector + +import ( + "go/ast" + "iter" +) + +// PreorderSeq returns an iterator that visits all the +// nodes of the files supplied to New in depth-first order. +// It visits each node n before n's children. +// The complete traversal sequence is determined by ast.Inspect. +// +// The types argument, if non-empty, enables type-based +// filtering of events: only nodes whose type matches an +// element of the types slice are included in the sequence. +func (in *Inspector) PreorderSeq(types ...ast.Node) iter.Seq[ast.Node] { + + // This implementation is identical to Preorder, + // except that it supports breaking out of the loop. + + return func(yield func(ast.Node) bool) { + mask := maskOf(types) + for i := int32(0); i < int32(len(in.events)); { + ev := in.events[i] + if ev.index > i { + // push + if ev.typ&mask != 0 { + if !yield(ev.node) { + break + } + } + pop := ev.index + if in.events[pop].typ&mask == 0 { + // Subtrees do not contain types: skip them and pop. + i = pop + 1 + continue + } + } + i++ + } + } +} + +// All[N] returns an iterator over all the nodes of type N. +// N must be a pointer-to-struct type that implements ast.Node. +// +// Example: +// +// for call := range All[*ast.CallExpr](in) { ... } +func All[N interface { + *S + ast.Node +}, S any](in *Inspector) iter.Seq[N] { + + // To avoid additional dynamic call overheads, + // we duplicate rather than call the logic of PreorderSeq. + + mask := typeOf((N)(nil)) + return func(yield func(N) bool) { + for i := int32(0); i < int32(len(in.events)); { + ev := in.events[i] + if ev.index > i { + // push + if ev.typ&mask != 0 { + if !yield(ev.node.(N)) { + break + } + } + pop := ev.index + if in.events[pop].typ&mask == 0 { + // Subtrees do not contain types: skip them and pop. + i = pop + 1 + continue + } + } + i++ + } + } +} diff --git a/backend/vendor/golang.org/x/tools/go/ast/inspector/typeof.go b/backend/vendor/golang.org/x/tools/go/ast/inspector/typeof.go new file mode 100644 index 0000000..9852331 --- /dev/null +++ b/backend/vendor/golang.org/x/tools/go/ast/inspector/typeof.go @@ -0,0 +1,227 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package inspector + +// This file defines func typeOf(ast.Node) uint64. +// +// The initial map-based implementation was too slow; +// see https://go-review.googlesource.com/c/tools/+/135655/1/go/ast/inspector/inspector.go#196 + +import ( + "go/ast" + "math" +) + +const ( + nArrayType = iota + nAssignStmt + nBadDecl + nBadExpr + nBadStmt + nBasicLit + nBinaryExpr + nBlockStmt + nBranchStmt + nCallExpr + nCaseClause + nChanType + nCommClause + nComment + nCommentGroup + nCompositeLit + nDeclStmt + nDeferStmt + nEllipsis + nEmptyStmt + nExprStmt + nField + nFieldList + nFile + nForStmt + nFuncDecl + nFuncLit + nFuncType + nGenDecl + nGoStmt + nIdent + nIfStmt + nImportSpec + nIncDecStmt + nIndexExpr + nIndexListExpr + nInterfaceType + nKeyValueExpr + nLabeledStmt + nMapType + nPackage + nParenExpr + nRangeStmt + nReturnStmt + nSelectStmt + nSelectorExpr + nSendStmt + nSliceExpr + nStarExpr + nStructType + nSwitchStmt + nTypeAssertExpr + nTypeSpec + nTypeSwitchStmt + nUnaryExpr + nValueSpec +) + +// typeOf returns a distinct single-bit value that represents the type of n. +// +// Various implementations were benchmarked with BenchmarkNewInspector: +// +// GOGC=off +// - type switch 4.9-5.5ms 2.1ms +// - binary search over a sorted list of types 5.5-5.9ms 2.5ms +// - linear scan, frequency-ordered list 5.9-6.1ms 2.7ms +// - linear scan, unordered list 6.4ms 2.7ms +// - hash table 6.5ms 3.1ms +// +// A perfect hash seemed like overkill. +// +// The compiler's switch statement is the clear winner +// as it produces a binary tree in code, +// with constant conditions and good branch prediction. +// (Sadly it is the most verbose in source code.) +// Binary search suffered from poor branch prediction. +func typeOf(n ast.Node) uint64 { + // Fast path: nearly half of all nodes are identifiers. + if _, ok := n.(*ast.Ident); ok { + return 1 << nIdent + } + + // These cases include all nodes encountered by ast.Inspect. + switch n.(type) { + case *ast.ArrayType: + return 1 << nArrayType + case *ast.AssignStmt: + return 1 << nAssignStmt + case *ast.BadDecl: + return 1 << nBadDecl + case *ast.BadExpr: + return 1 << nBadExpr + case *ast.BadStmt: + return 1 << nBadStmt + case *ast.BasicLit: + return 1 << nBasicLit + case *ast.BinaryExpr: + return 1 << nBinaryExpr + case *ast.BlockStmt: + return 1 << nBlockStmt + case *ast.BranchStmt: + return 1 << nBranchStmt + case *ast.CallExpr: + return 1 << nCallExpr + case *ast.CaseClause: + return 1 << nCaseClause + case *ast.ChanType: + return 1 << nChanType + case *ast.CommClause: + return 1 << nCommClause + case *ast.Comment: + return 1 << nComment + case *ast.CommentGroup: + return 1 << nCommentGroup + case *ast.CompositeLit: + return 1 << nCompositeLit + case *ast.DeclStmt: + return 1 << nDeclStmt + case *ast.DeferStmt: + return 1 << nDeferStmt + case *ast.Ellipsis: + return 1 << nEllipsis + case *ast.EmptyStmt: + return 1 << nEmptyStmt + case *ast.ExprStmt: + return 1 << nExprStmt + case *ast.Field: + return 1 << nField + case *ast.FieldList: + return 1 << nFieldList + case *ast.File: + return 1 << nFile + case *ast.ForStmt: + return 1 << nForStmt + case *ast.FuncDecl: + return 1 << nFuncDecl + case *ast.FuncLit: + return 1 << nFuncLit + case *ast.FuncType: + return 1 << nFuncType + case *ast.GenDecl: + return 1 << nGenDecl + case *ast.GoStmt: + return 1 << nGoStmt + case *ast.Ident: + return 1 << nIdent + case *ast.IfStmt: + return 1 << nIfStmt + case *ast.ImportSpec: + return 1 << nImportSpec + case *ast.IncDecStmt: + return 1 << nIncDecStmt + case *ast.IndexExpr: + return 1 << nIndexExpr + case *ast.IndexListExpr: + return 1 << nIndexListExpr + case *ast.InterfaceType: + return 1 << nInterfaceType + case *ast.KeyValueExpr: + return 1 << nKeyValueExpr + case *ast.LabeledStmt: + return 1 << nLabeledStmt + case *ast.MapType: + return 1 << nMapType + case *ast.Package: + return 1 << nPackage + case *ast.ParenExpr: + return 1 << nParenExpr + case *ast.RangeStmt: + return 1 << nRangeStmt + case *ast.ReturnStmt: + return 1 << nReturnStmt + case *ast.SelectStmt: + return 1 << nSelectStmt + case *ast.SelectorExpr: + return 1 << nSelectorExpr + case *ast.SendStmt: + return 1 << nSendStmt + case *ast.SliceExpr: + return 1 << nSliceExpr + case *ast.StarExpr: + return 1 << nStarExpr + case *ast.StructType: + return 1 << nStructType + case *ast.SwitchStmt: + return 1 << nSwitchStmt + case *ast.TypeAssertExpr: + return 1 << nTypeAssertExpr + case *ast.TypeSpec: + return 1 << nTypeSpec + case *ast.TypeSwitchStmt: + return 1 << nTypeSwitchStmt + case *ast.UnaryExpr: + return 1 << nUnaryExpr + case *ast.ValueSpec: + return 1 << nValueSpec + } + return 0 +} + +func maskOf(nodes []ast.Node) uint64 { + if len(nodes) == 0 { + return math.MaxUint64 // match all node types + } + var mask uint64 + for _, n := range nodes { + mask |= typeOf(n) + } + return mask +} diff --git a/backend/vendor/golang.org/x/tools/go/ast/inspector/walk.go b/backend/vendor/golang.org/x/tools/go/ast/inspector/walk.go new file mode 100644 index 0000000..5f1c93c --- /dev/null +++ b/backend/vendor/golang.org/x/tools/go/ast/inspector/walk.go @@ -0,0 +1,341 @@ +// Copyright 2025 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package inspector + +// This file is a fork of ast.Inspect to reduce unnecessary dynamic +// calls and to gather edge information. +// +// Consistency with the original is ensured by TestInspectAllNodes. + +import ( + "fmt" + "go/ast" + + "golang.org/x/tools/go/ast/edge" +) + +func walkList[N ast.Node](v *visitor, ek edge.Kind, list []N) { + for i, node := range list { + walk(v, ek, i, node) + } +} + +func walk(v *visitor, ek edge.Kind, index int, node ast.Node) { + v.push(ek, index, node) + + // walk children + // (the order of the cases matches the order + // of the corresponding node types in ast.go) + switch n := node.(type) { + // Comments and fields + case *ast.Comment: + // nothing to do + + case *ast.CommentGroup: + walkList(v, edge.CommentGroup_List, n.List) + + case *ast.Field: + if n.Doc != nil { + walk(v, edge.Field_Doc, -1, n.Doc) + } + walkList(v, edge.Field_Names, n.Names) + if n.Type != nil { + walk(v, edge.Field_Type, -1, n.Type) + } + if n.Tag != nil { + walk(v, edge.Field_Tag, -1, n.Tag) + } + if n.Comment != nil { + walk(v, edge.Field_Comment, -1, n.Comment) + } + + case *ast.FieldList: + walkList(v, edge.FieldList_List, n.List) + + // Expressions + case *ast.BadExpr, *ast.Ident, *ast.BasicLit: + // nothing to do + + case *ast.Ellipsis: + if n.Elt != nil { + walk(v, edge.Ellipsis_Elt, -1, n.Elt) + } + + case *ast.FuncLit: + walk(v, edge.FuncLit_Type, -1, n.Type) + walk(v, edge.FuncLit_Body, -1, n.Body) + + case *ast.CompositeLit: + if n.Type != nil { + walk(v, edge.CompositeLit_Type, -1, n.Type) + } + walkList(v, edge.CompositeLit_Elts, n.Elts) + + case *ast.ParenExpr: + walk(v, edge.ParenExpr_X, -1, n.X) + + case *ast.SelectorExpr: + walk(v, edge.SelectorExpr_X, -1, n.X) + walk(v, edge.SelectorExpr_Sel, -1, n.Sel) + + case *ast.IndexExpr: + walk(v, edge.IndexExpr_X, -1, n.X) + walk(v, edge.IndexExpr_Index, -1, n.Index) + + case *ast.IndexListExpr: + walk(v, edge.IndexListExpr_X, -1, n.X) + walkList(v, edge.IndexListExpr_Indices, n.Indices) + + case *ast.SliceExpr: + walk(v, edge.SliceExpr_X, -1, n.X) + if n.Low != nil { + walk(v, edge.SliceExpr_Low, -1, n.Low) + } + if n.High != nil { + walk(v, edge.SliceExpr_High, -1, n.High) + } + if n.Max != nil { + walk(v, edge.SliceExpr_Max, -1, n.Max) + } + + case *ast.TypeAssertExpr: + walk(v, edge.TypeAssertExpr_X, -1, n.X) + if n.Type != nil { + walk(v, edge.TypeAssertExpr_Type, -1, n.Type) + } + + case *ast.CallExpr: + walk(v, edge.CallExpr_Fun, -1, n.Fun) + walkList(v, edge.CallExpr_Args, n.Args) + + case *ast.StarExpr: + walk(v, edge.StarExpr_X, -1, n.X) + + case *ast.UnaryExpr: + walk(v, edge.UnaryExpr_X, -1, n.X) + + case *ast.BinaryExpr: + walk(v, edge.BinaryExpr_X, -1, n.X) + walk(v, edge.BinaryExpr_Y, -1, n.Y) + + case *ast.KeyValueExpr: + walk(v, edge.KeyValueExpr_Key, -1, n.Key) + walk(v, edge.KeyValueExpr_Value, -1, n.Value) + + // Types + case *ast.ArrayType: + if n.Len != nil { + walk(v, edge.ArrayType_Len, -1, n.Len) + } + walk(v, edge.ArrayType_Elt, -1, n.Elt) + + case *ast.StructType: + walk(v, edge.StructType_Fields, -1, n.Fields) + + case *ast.FuncType: + if n.TypeParams != nil { + walk(v, edge.FuncType_TypeParams, -1, n.TypeParams) + } + if n.Params != nil { + walk(v, edge.FuncType_Params, -1, n.Params) + } + if n.Results != nil { + walk(v, edge.FuncType_Results, -1, n.Results) + } + + case *ast.InterfaceType: + walk(v, edge.InterfaceType_Methods, -1, n.Methods) + + case *ast.MapType: + walk(v, edge.MapType_Key, -1, n.Key) + walk(v, edge.MapType_Value, -1, n.Value) + + case *ast.ChanType: + walk(v, edge.ChanType_Value, -1, n.Value) + + // Statements + case *ast.BadStmt: + // nothing to do + + case *ast.DeclStmt: + walk(v, edge.DeclStmt_Decl, -1, n.Decl) + + case *ast.EmptyStmt: + // nothing to do + + case *ast.LabeledStmt: + walk(v, edge.LabeledStmt_Label, -1, n.Label) + walk(v, edge.LabeledStmt_Stmt, -1, n.Stmt) + + case *ast.ExprStmt: + walk(v, edge.ExprStmt_X, -1, n.X) + + case *ast.SendStmt: + walk(v, edge.SendStmt_Chan, -1, n.Chan) + walk(v, edge.SendStmt_Value, -1, n.Value) + + case *ast.IncDecStmt: + walk(v, edge.IncDecStmt_X, -1, n.X) + + case *ast.AssignStmt: + walkList(v, edge.AssignStmt_Lhs, n.Lhs) + walkList(v, edge.AssignStmt_Rhs, n.Rhs) + + case *ast.GoStmt: + walk(v, edge.GoStmt_Call, -1, n.Call) + + case *ast.DeferStmt: + walk(v, edge.DeferStmt_Call, -1, n.Call) + + case *ast.ReturnStmt: + walkList(v, edge.ReturnStmt_Results, n.Results) + + case *ast.BranchStmt: + if n.Label != nil { + walk(v, edge.BranchStmt_Label, -1, n.Label) + } + + case *ast.BlockStmt: + walkList(v, edge.BlockStmt_List, n.List) + + case *ast.IfStmt: + if n.Init != nil { + walk(v, edge.IfStmt_Init, -1, n.Init) + } + walk(v, edge.IfStmt_Cond, -1, n.Cond) + walk(v, edge.IfStmt_Body, -1, n.Body) + if n.Else != nil { + walk(v, edge.IfStmt_Else, -1, n.Else) + } + + case *ast.CaseClause: + walkList(v, edge.CaseClause_List, n.List) + walkList(v, edge.CaseClause_Body, n.Body) + + case *ast.SwitchStmt: + if n.Init != nil { + walk(v, edge.SwitchStmt_Init, -1, n.Init) + } + if n.Tag != nil { + walk(v, edge.SwitchStmt_Tag, -1, n.Tag) + } + walk(v, edge.SwitchStmt_Body, -1, n.Body) + + case *ast.TypeSwitchStmt: + if n.Init != nil { + walk(v, edge.TypeSwitchStmt_Init, -1, n.Init) + } + walk(v, edge.TypeSwitchStmt_Assign, -1, n.Assign) + walk(v, edge.TypeSwitchStmt_Body, -1, n.Body) + + case *ast.CommClause: + if n.Comm != nil { + walk(v, edge.CommClause_Comm, -1, n.Comm) + } + walkList(v, edge.CommClause_Body, n.Body) + + case *ast.SelectStmt: + walk(v, edge.SelectStmt_Body, -1, n.Body) + + case *ast.ForStmt: + if n.Init != nil { + walk(v, edge.ForStmt_Init, -1, n.Init) + } + if n.Cond != nil { + walk(v, edge.ForStmt_Cond, -1, n.Cond) + } + if n.Post != nil { + walk(v, edge.ForStmt_Post, -1, n.Post) + } + walk(v, edge.ForStmt_Body, -1, n.Body) + + case *ast.RangeStmt: + if n.Key != nil { + walk(v, edge.RangeStmt_Key, -1, n.Key) + } + if n.Value != nil { + walk(v, edge.RangeStmt_Value, -1, n.Value) + } + walk(v, edge.RangeStmt_X, -1, n.X) + walk(v, edge.RangeStmt_Body, -1, n.Body) + + // Declarations + case *ast.ImportSpec: + if n.Doc != nil { + walk(v, edge.ImportSpec_Doc, -1, n.Doc) + } + if n.Name != nil { + walk(v, edge.ImportSpec_Name, -1, n.Name) + } + walk(v, edge.ImportSpec_Path, -1, n.Path) + if n.Comment != nil { + walk(v, edge.ImportSpec_Comment, -1, n.Comment) + } + + case *ast.ValueSpec: + if n.Doc != nil { + walk(v, edge.ValueSpec_Doc, -1, n.Doc) + } + walkList(v, edge.ValueSpec_Names, n.Names) + if n.Type != nil { + walk(v, edge.ValueSpec_Type, -1, n.Type) + } + walkList(v, edge.ValueSpec_Values, n.Values) + if n.Comment != nil { + walk(v, edge.ValueSpec_Comment, -1, n.Comment) + } + + case *ast.TypeSpec: + if n.Doc != nil { + walk(v, edge.TypeSpec_Doc, -1, n.Doc) + } + walk(v, edge.TypeSpec_Name, -1, n.Name) + if n.TypeParams != nil { + walk(v, edge.TypeSpec_TypeParams, -1, n.TypeParams) + } + walk(v, edge.TypeSpec_Type, -1, n.Type) + if n.Comment != nil { + walk(v, edge.TypeSpec_Comment, -1, n.Comment) + } + + case *ast.BadDecl: + // nothing to do + + case *ast.GenDecl: + if n.Doc != nil { + walk(v, edge.GenDecl_Doc, -1, n.Doc) + } + walkList(v, edge.GenDecl_Specs, n.Specs) + + case *ast.FuncDecl: + if n.Doc != nil { + walk(v, edge.FuncDecl_Doc, -1, n.Doc) + } + if n.Recv != nil { + walk(v, edge.FuncDecl_Recv, -1, n.Recv) + } + walk(v, edge.FuncDecl_Name, -1, n.Name) + walk(v, edge.FuncDecl_Type, -1, n.Type) + if n.Body != nil { + walk(v, edge.FuncDecl_Body, -1, n.Body) + } + + case *ast.File: + if n.Doc != nil { + walk(v, edge.File_Doc, -1, n.Doc) + } + walk(v, edge.File_Name, -1, n.Name) + walkList(v, edge.File_Decls, n.Decls) + // don't walk n.Comments - they have been + // visited already through the individual + // nodes + + default: + // (includes *ast.Package) + panic(fmt.Sprintf("Walk: unexpected node type %T", n)) + } + + v.pop(node) +} diff --git a/backend/vendor/golang.org/x/tools/imports/forward.go b/backend/vendor/golang.org/x/tools/imports/forward.go new file mode 100644 index 0000000..22ae777 --- /dev/null +++ b/backend/vendor/golang.org/x/tools/imports/forward.go @@ -0,0 +1,71 @@ +// Copyright 2019 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package imports implements a Go pretty-printer (like package "go/format") +// that also adds or removes import statements as necessary. +package imports // import "golang.org/x/tools/imports" + +import ( + "log" + "os" + + "golang.org/x/tools/internal/gocommand" + intimp "golang.org/x/tools/internal/imports" +) + +// Options specifies options for processing files. +type Options struct { + Fragment bool // Accept fragment of a source file (no package statement) + AllErrors bool // Report all errors (not just the first 10 on different lines) + + Comments bool // Print comments (true if nil *Options provided) + TabIndent bool // Use tabs for indent (true if nil *Options provided) + TabWidth int // Tab width (8 if nil *Options provided) + + FormatOnly bool // Disable the insertion and deletion of imports +} + +// Debug controls verbose logging. +var Debug = false + +// LocalPrefix is a comma-separated string of import path prefixes, which, if +// set, instructs Process to sort the import paths with the given prefixes +// into another group after 3rd-party packages. +var LocalPrefix string + +// Process formats and adjusts imports for the provided file. +// If opt is nil the defaults are used, and if src is nil the source +// is read from the filesystem. +// +// Note that filename's directory influences which imports can be chosen, +// so it is important that filename be accurate. +// To process data “as if” it were in filename, pass the data as a non-nil src. +func Process(filename string, src []byte, opt *Options) ([]byte, error) { + var err error + if src == nil { + src, err = os.ReadFile(filename) + if err != nil { + return nil, err + } + } + if opt == nil { + opt = &Options{Comments: true, TabIndent: true, TabWidth: 8} + } + intopt := &intimp.Options{ + Env: &intimp.ProcessEnv{ + GocmdRunner: &gocommand.Runner{}, + }, + LocalPrefix: LocalPrefix, + AllErrors: opt.AllErrors, + Comments: opt.Comments, + FormatOnly: opt.FormatOnly, + Fragment: opt.Fragment, + TabIndent: opt.TabIndent, + TabWidth: opt.TabWidth, + } + if Debug { + intopt.Env.Logf = log.Printf + } + return intimp.Process(filename, src, intopt) +} diff --git a/backend/vendor/golang.org/x/tools/internal/gopathwalk/walk.go b/backend/vendor/golang.org/x/tools/internal/gopathwalk/walk.go new file mode 100644 index 0000000..5252144 --- /dev/null +++ b/backend/vendor/golang.org/x/tools/internal/gopathwalk/walk.go @@ -0,0 +1,336 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package gopathwalk is like filepath.Walk but specialized for finding Go +// packages, particularly in $GOPATH and $GOROOT. +package gopathwalk + +import ( + "bufio" + "bytes" + "io" + "io/fs" + "os" + "path/filepath" + "runtime" + "slices" + "strings" + "sync" + "time" +) + +// Options controls the behavior of a Walk call. +type Options struct { + // If Logf is non-nil, debug logging is enabled through this function. + Logf func(format string, args ...any) + + // Search module caches. Also disables legacy goimports ignore rules. + ModulesEnabled bool + + // Maximum number of concurrent calls to user-provided callbacks, + // or 0 for GOMAXPROCS. + Concurrency int +} + +// RootType indicates the type of a Root. +type RootType int + +const ( + RootUnknown RootType = iota + RootGOROOT + RootGOPATH + RootCurrentModule + RootModuleCache + RootOther +) + +// A Root is a starting point for a Walk. +type Root struct { + Path string + Type RootType +} + +// Walk concurrently walks Go source directories ($GOROOT, $GOPATH, etc) to find packages. +// +// For each package found, add will be called with the absolute +// paths of the containing source directory and the package directory. +// +// Unlike filepath.WalkDir, Walk follows symbolic links +// (while guarding against cycles). +func Walk(roots []Root, add func(root Root, dir string), opts Options) { + WalkSkip(roots, add, func(Root, string) bool { return false }, opts) +} + +// WalkSkip concurrently walks Go source directories ($GOROOT, $GOPATH, etc) to +// find packages. +// +// For each package found, add will be called with the absolute +// paths of the containing source directory and the package directory. +// For each directory that will be scanned, skip will be called +// with the absolute paths of the containing source directory and the directory. +// If skip returns false on a directory it will be processed. +// +// Unlike filepath.WalkDir, WalkSkip follows symbolic links +// (while guarding against cycles). +func WalkSkip(roots []Root, add func(root Root, dir string), skip func(root Root, dir string) bool, opts Options) { + for _, root := range roots { + walkDir(root, add, skip, opts) + } +} + +// walkDir creates a walker and starts fastwalk with this walker. +func walkDir(root Root, add func(Root, string), skip func(root Root, dir string) bool, opts Options) { + if opts.Logf == nil { + opts.Logf = func(format string, args ...any) {} + } + if _, err := os.Stat(root.Path); os.IsNotExist(err) { + opts.Logf("skipping nonexistent directory: %v", root.Path) + return + } + start := time.Now() + opts.Logf("scanning %s", root.Path) + + concurrency := opts.Concurrency + if concurrency == 0 { + // The walk be either CPU-bound or I/O-bound, depending on what the + // caller-supplied add function does and the details of the user's platform + // and machine. Rather than trying to fine-tune the concurrency level for a + // specific environment, we default to GOMAXPROCS: it is likely to be a good + // choice for a CPU-bound add function, and if it is instead I/O-bound, then + // dealing with I/O saturation is arguably the job of the kernel and/or + // runtime. (Oversaturating I/O seems unlikely to harm performance as badly + // as failing to saturate would.) + concurrency = runtime.GOMAXPROCS(0) + } + w := &walker{ + root: root, + add: add, + skip: skip, + opts: opts, + sem: make(chan struct{}, concurrency), + } + w.init() + + w.sem <- struct{}{} + path := root.Path + if path == "" { + path = "." + } + if fi, err := os.Lstat(path); err == nil { + w.walk(path, nil, fs.FileInfoToDirEntry(fi)) + } else { + w.opts.Logf("scanning directory %v: %v", root.Path, err) + } + <-w.sem + w.walking.Wait() + + opts.Logf("scanned %s in %v", root.Path, time.Since(start)) +} + +// walker is the callback for fastwalk.Walk. +type walker struct { + root Root // The source directory to scan. + add func(Root, string) // The callback that will be invoked for every possible Go package dir. + skip func(Root, string) bool // The callback that will be invoked for every dir. dir is skipped if it returns true. + opts Options // Options passed to Walk by the user. + + walking sync.WaitGroup + sem chan struct{} // Channel of semaphore tokens; send to acquire, receive to release. + ignoredDirs []string + + added sync.Map // map[string]bool +} + +// A symlinkList is a linked list of os.FileInfos for parent directories +// reached via symlinks. +type symlinkList struct { + info os.FileInfo + prev *symlinkList +} + +// init initializes the walker based on its Options +func (w *walker) init() { + var ignoredPaths []string + if w.root.Type == RootModuleCache { + ignoredPaths = []string{"cache"} + } + if !w.opts.ModulesEnabled && w.root.Type == RootGOPATH { + ignoredPaths = w.getIgnoredDirs(w.root.Path) + ignoredPaths = append(ignoredPaths, "v", "mod") + } + + for _, p := range ignoredPaths { + full := filepath.Join(w.root.Path, p) + w.ignoredDirs = append(w.ignoredDirs, full) + w.opts.Logf("Directory added to ignore list: %s", full) + } +} + +// getIgnoredDirs reads an optional config file at /.goimportsignore +// of relative directories to ignore when scanning for go files. +// The provided path is one of the $GOPATH entries with "src" appended. +func (w *walker) getIgnoredDirs(path string) []string { + file := filepath.Join(path, ".goimportsignore") + slurp, err := os.ReadFile(file) + if err != nil { + w.opts.Logf("%v", err) + } else { + w.opts.Logf("Read %s", file) + } + if err != nil { + return nil + } + + var ignoredDirs []string + bs := bufio.NewScanner(bytes.NewReader(slurp)) + for bs.Scan() { + line := strings.TrimSpace(bs.Text()) + if line == "" || strings.HasPrefix(line, "#") { + continue + } + ignoredDirs = append(ignoredDirs, line) + } + return ignoredDirs +} + +// shouldSkipDir reports whether the file should be skipped or not. +func (w *walker) shouldSkipDir(dir string) bool { + if slices.Contains(w.ignoredDirs, dir) { + return true + } + if w.skip != nil { + // Check with the user specified callback. + return w.skip(w.root, dir) + } + return false +} + +// walk walks through the given path. +// +// Errors are logged if w.opts.Logf is non-nil, but otherwise ignored. +func (w *walker) walk(path string, pathSymlinks *symlinkList, d fs.DirEntry) { + if d.Type()&os.ModeSymlink != 0 { + // Walk the symlink's target rather than the symlink itself. + // + // (Note that os.Stat, unlike the lower-lever os.Readlink, + // follows arbitrarily many layers of symlinks, so it will eventually + // reach either a non-symlink or a nonexistent target.) + // + // TODO(bcmills): 'go list all' itself ignores symlinks within GOROOT/src + // and GOPATH/src. Do we really need to traverse them here? If so, why? + + fi, err := os.Stat(path) + if err != nil { + w.opts.Logf("%v", err) + return + } + + // Avoid walking symlink cycles: if we have already followed a symlink to + // this directory as a parent of itself, don't follow it again. + // + // This doesn't catch the first time through a cycle, but it also minimizes + // the number of extra stat calls we make if we *don't* encounter a cycle. + // Since we don't actually expect to encounter symlink cycles in practice, + // this seems like the right tradeoff. + for parent := pathSymlinks; parent != nil; parent = parent.prev { + if os.SameFile(fi, parent.info) { + return + } + } + + pathSymlinks = &symlinkList{ + info: fi, + prev: pathSymlinks, + } + d = fs.FileInfoToDirEntry(fi) + } + + if d.Type().IsRegular() { + if !strings.HasSuffix(path, ".go") { + return + } + + dir := filepath.Dir(path) + if dir == w.root.Path && (w.root.Type == RootGOROOT || w.root.Type == RootGOPATH) { + // Doesn't make sense to have regular files + // directly in your $GOPATH/src or $GOROOT/src. + // + // TODO(bcmills): there are many levels of directory within + // RootModuleCache where this also wouldn't make sense, + // Can we generalize this to any directory without a corresponding + // import path? + return + } + + if _, dup := w.added.LoadOrStore(dir, true); !dup { + w.add(w.root, dir) + } + } + + if !d.IsDir() { + return + } + + base := filepath.Base(path) + if base == "" || base[0] == '.' || base[0] == '_' || + base == "testdata" || + (w.root.Type == RootGOROOT && w.opts.ModulesEnabled && base == "vendor") || + (!w.opts.ModulesEnabled && base == "node_modules") || + w.shouldSkipDir(path) { + return + } + + // Read the directory and walk its entries. + + f, err := os.Open(path) + if err != nil { + w.opts.Logf("%v", err) + return + } + defer f.Close() + + for { + // We impose an arbitrary limit on the number of ReadDir results per + // directory to limit the amount of memory consumed for stale or upcoming + // directory entries. The limit trades off CPU (number of syscalls to read + // the whole directory) against RAM (reachable directory entries other than + // the one currently being processed). + // + // Since we process the directories recursively, we will end up maintaining + // a slice of entries for each level of the directory tree. + // (Compare https://go.dev/issue/36197.) + ents, err := f.ReadDir(1024) + if err != nil { + if err != io.EOF { + w.opts.Logf("%v", err) + } + break + } + + for _, d := range ents { + nextPath := filepath.Join(path, d.Name()) + if d.IsDir() { + select { + case w.sem <- struct{}{}: + // Got a new semaphore token, so we can traverse the directory concurrently. + d := d + w.walking.Add(1) + go func() { + defer func() { + <-w.sem + w.walking.Done() + }() + w.walk(nextPath, pathSymlinks, d) + }() + continue + + default: + // No tokens available, so traverse serially. + } + } + + w.walk(nextPath, pathSymlinks, d) + } + } +} diff --git a/backend/vendor/golang.org/x/tools/internal/imports/fix.go b/backend/vendor/golang.org/x/tools/internal/imports/fix.go new file mode 100644 index 0000000..1b4dc0c --- /dev/null +++ b/backend/vendor/golang.org/x/tools/internal/imports/fix.go @@ -0,0 +1,1896 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package imports + +import ( + "bytes" + "context" + "encoding/json" + "fmt" + "go/ast" + "go/build" + "go/parser" + "go/token" + "go/types" + "io/fs" + "io/ioutil" + "maps" + "os" + "path" + "path/filepath" + "reflect" + "sort" + "strconv" + "strings" + "sync" + "unicode" + "unicode/utf8" + + "golang.org/x/tools/go/ast/astutil" + "golang.org/x/tools/internal/event" + "golang.org/x/tools/internal/gocommand" + "golang.org/x/tools/internal/gopathwalk" + "golang.org/x/tools/internal/stdlib" +) + +// importToGroup is a list of functions which map from an import path to +// a group number. +var importToGroup = []func(localPrefix, importPath string) (num int, ok bool){ + func(localPrefix, importPath string) (num int, ok bool) { + if localPrefix == "" { + return + } + for p := range strings.SplitSeq(localPrefix, ",") { + if strings.HasPrefix(importPath, p) || strings.TrimSuffix(p, "/") == importPath { + return 3, true + } + } + return + }, + func(_, importPath string) (num int, ok bool) { + if strings.HasPrefix(importPath, "appengine") { + return 2, true + } + return + }, + func(_, importPath string) (num int, ok bool) { + firstComponent := strings.Split(importPath, "/")[0] + if strings.Contains(firstComponent, ".") { + return 1, true + } + return + }, +} + +func importGroup(localPrefix, importPath string) int { + for _, fn := range importToGroup { + if n, ok := fn(localPrefix, importPath); ok { + return n + } + } + return 0 +} + +type ImportFixType int + +const ( + AddImport ImportFixType = iota + DeleteImport + SetImportName +) + +type ImportFix struct { + // StmtInfo represents the import statement this fix will add, remove, or change. + StmtInfo ImportInfo + // IdentName is the identifier that this fix will add or remove. + IdentName string + // FixType is the type of fix this is (AddImport, DeleteImport, SetImportName). + FixType ImportFixType + Relevance float64 // see pkg +} + +// parseOtherFiles parses all the Go files in srcDir except filename, including +// test files if filename looks like a test. +// +// It returns an error only if ctx is cancelled. Files with parse errors are +// ignored. +func parseOtherFiles(ctx context.Context, fset *token.FileSet, srcDir, filename string) ([]*ast.File, error) { + // This could use go/packages but it doesn't buy much, and it fails + // with https://golang.org/issue/26296 in LoadFiles mode in some cases. + considerTests := strings.HasSuffix(filename, "_test.go") + + fileBase := filepath.Base(filename) + packageFileInfos, err := os.ReadDir(srcDir) + if err != nil { + return nil, ctx.Err() + } + + var files []*ast.File + for _, fi := range packageFileInfos { + if ctx.Err() != nil { + return nil, ctx.Err() + } + if fi.Name() == fileBase || !strings.HasSuffix(fi.Name(), ".go") { + continue + } + if !considerTests && strings.HasSuffix(fi.Name(), "_test.go") { + continue + } + + f, err := parser.ParseFile(fset, filepath.Join(srcDir, fi.Name()), nil, parser.SkipObjectResolution) + if err != nil { + continue + } + + files = append(files, f) + } + + return files, ctx.Err() +} + +// addGlobals puts the names of package vars into the provided map. +func addGlobals(f *ast.File, globals map[string]bool) { + for _, decl := range f.Decls { + genDecl, ok := decl.(*ast.GenDecl) + if !ok { + continue + } + + for _, spec := range genDecl.Specs { + valueSpec, ok := spec.(*ast.ValueSpec) + if !ok { + continue + } + globals[valueSpec.Names[0].Name] = true + } + } +} + +// collectReferences builds a map of selector expressions, from +// left hand side (X) to a set of right hand sides (Sel). +func collectReferences(f *ast.File) References { + refs := References{} + + var visitor visitFn + visitor = func(node ast.Node) ast.Visitor { + if node == nil { + return visitor + } + switch v := node.(type) { + case *ast.SelectorExpr: + xident, ok := v.X.(*ast.Ident) + if !ok { + break + } + if xident.Obj != nil { + // If the parser can resolve it, it's not a package ref. + break + } + if !ast.IsExported(v.Sel.Name) { + // Whatever this is, it's not exported from a package. + break + } + pkgName := xident.Name + r := refs[pkgName] + if r == nil { + r = make(map[string]bool) + refs[pkgName] = r + } + r[v.Sel.Name] = true + } + return visitor + } + ast.Walk(visitor, f) + return refs +} + +// collectImports returns all the imports in f. +// Unnamed imports (., _) and "C" are ignored. +func collectImports(f *ast.File) []*ImportInfo { + var imports []*ImportInfo + for _, imp := range f.Imports { + var name string + if imp.Name != nil { + name = imp.Name.Name + } + if imp.Path.Value == `"C"` || name == "_" || name == "." { + continue + } + path := strings.Trim(imp.Path.Value, `"`) + imports = append(imports, &ImportInfo{ + Name: name, + ImportPath: path, + }) + } + return imports +} + +// findMissingImport searches pass's candidates for an import that provides +// pkg, containing all of syms. +func (p *pass) findMissingImport(pkg string, syms map[string]bool) *ImportInfo { + for _, candidate := range p.candidates { + pkgInfo, ok := p.knownPackages[candidate.ImportPath] + if !ok { + continue + } + if p.importIdentifier(candidate) != pkg { + continue + } + + allFound := true + for right := range syms { + if !pkgInfo.Exports[right] { + allFound = false + break + } + } + + if allFound { + return candidate + } + } + return nil +} + +// A pass contains all the inputs and state necessary to fix a file's imports. +// It can be modified in some ways during use; see comments below. +type pass struct { + // Inputs. These must be set before a call to load, and not modified after. + fset *token.FileSet // fset used to parse f and its siblings. + f *ast.File // the file being fixed. + srcDir string // the directory containing f. + logf func(string, ...any) + source Source // the environment to use for go commands, etc. + loadRealPackageNames bool // if true, load package names from disk rather than guessing them. + otherFiles []*ast.File // sibling files. + goroot string + + // Intermediate state, generated by load. + existingImports map[string][]*ImportInfo + allRefs References + missingRefs References + + // Inputs to fix. These can be augmented between successive fix calls. + lastTry bool // indicates that this is the last call and fix should clean up as best it can. + candidates []*ImportInfo // candidate imports in priority order. + knownPackages map[string]*PackageInfo // information about all known packages. +} + +// loadPackageNames saves the package names for everything referenced by imports. +func (p *pass) loadPackageNames(ctx context.Context, imports []*ImportInfo) error { + if p.logf != nil { + p.logf("loading package names for %v packages", len(imports)) + defer func() { + p.logf("done loading package names for %v packages", len(imports)) + }() + } + var unknown []string + for _, imp := range imports { + if _, ok := p.knownPackages[imp.ImportPath]; ok { + continue + } + unknown = append(unknown, imp.ImportPath) + } + + names, err := p.source.LoadPackageNames(ctx, p.srcDir, unknown) + if err != nil { + return err + } + + // TODO(rfindley): revisit this. Why do we need to store known packages with + // no exports? The inconsistent data is confusing. + for path, name := range names { + p.knownPackages[path] = &PackageInfo{ + Name: name, + Exports: map[string]bool{}, + } + } + return nil +} + +// WithoutVersion removes a trailing major version, if there is one. +func WithoutVersion(nm string) string { + if v := path.Base(nm); len(v) > 0 && v[0] == 'v' { + if _, err := strconv.Atoi(v[1:]); err == nil { + // this is, for instance, called with rand/v2 and returns rand + if len(v) < len(nm) { + xnm := nm[:len(nm)-len(v)-1] + return path.Base(xnm) + } + } + } + return nm +} + +// importIdentifier returns the identifier that imp will introduce. It will +// guess if the package name has not been loaded, e.g. because the source +// is not available. +func (p *pass) importIdentifier(imp *ImportInfo) string { + if imp.Name != "" { + return imp.Name + } + known := p.knownPackages[imp.ImportPath] + if known != nil && known.Name != "" { + return WithoutVersion(known.Name) + } + return ImportPathToAssumedName(imp.ImportPath) +} + +// load reads in everything necessary to run a pass, and reports whether the +// file already has all the imports it needs. It fills in p.missingRefs with the +// file's missing symbols, if any, or removes unused imports if not. +func (p *pass) load(ctx context.Context) ([]*ImportFix, bool) { + p.knownPackages = map[string]*PackageInfo{} + p.missingRefs = References{} + p.existingImports = map[string][]*ImportInfo{} + + // Load basic information about the file in question. + p.allRefs = collectReferences(p.f) + + // Load stuff from other files in the same package: + // global variables so we know they don't need resolving, and imports + // that we might want to mimic. + globals := map[string]bool{} + for _, otherFile := range p.otherFiles { + // Don't load globals from files that are in the same directory + // but a different package. Using them to suggest imports is OK. + if p.f.Name.Name == otherFile.Name.Name { + addGlobals(otherFile, globals) + } + p.candidates = append(p.candidates, collectImports(otherFile)...) + } + + // Resolve all the import paths we've seen to package names, and store + // f's imports by the identifier they introduce. + imports := collectImports(p.f) + if p.loadRealPackageNames { + err := p.loadPackageNames(ctx, append(imports, p.candidates...)) + if err != nil { + if p.logf != nil { + p.logf("loading package names: %v", err) + } + return nil, false + } + } + for _, imp := range imports { + p.existingImports[p.importIdentifier(imp)] = append(p.existingImports[p.importIdentifier(imp)], imp) + } + + // Find missing references. + for left, rights := range p.allRefs { + if globals[left] { + continue + } + _, ok := p.existingImports[left] + if !ok { + p.missingRefs[left] = rights + continue + } + } + if len(p.missingRefs) != 0 { + return nil, false + } + + return p.fix() +} + +// fix attempts to satisfy missing imports using p.candidates. If it finds +// everything, or if p.lastTry is true, it updates fixes to add the imports it found, +// delete anything unused, and update import names, and returns true. +func (p *pass) fix() ([]*ImportFix, bool) { + // Find missing imports. + var selected []*ImportInfo + for left, rights := range p.missingRefs { + if imp := p.findMissingImport(left, rights); imp != nil { + selected = append(selected, imp) + } + } + + if !p.lastTry && len(selected) != len(p.missingRefs) { + return nil, false + } + + // Found everything, or giving up. Add the new imports and remove any unused. + var fixes []*ImportFix + for _, identifierImports := range p.existingImports { + for _, imp := range identifierImports { + // We deliberately ignore globals here, because we can't be sure + // they're in the same package. People do things like put multiple + // main packages in the same directory, and we don't want to + // remove imports if they happen to have the same name as a var in + // a different package. + if _, ok := p.allRefs[p.importIdentifier(imp)]; !ok { + fixes = append(fixes, &ImportFix{ + StmtInfo: *imp, + IdentName: p.importIdentifier(imp), + FixType: DeleteImport, + }) + continue + } + + // An existing import may need to update its import name to be correct. + if name := p.importSpecName(imp); name != imp.Name { + fixes = append(fixes, &ImportFix{ + StmtInfo: ImportInfo{ + Name: name, + ImportPath: imp.ImportPath, + }, + IdentName: p.importIdentifier(imp), + FixType: SetImportName, + }) + } + } + } + // Collecting fixes involved map iteration, so sort for stability. See + // golang/go#59976. + sortFixes(fixes) + + // collect selected fixes in a separate slice, so that it can be sorted + // separately. Note that these fixes must occur after fixes to existing + // imports. TODO(rfindley): figure out why. + var selectedFixes []*ImportFix + for _, imp := range selected { + selectedFixes = append(selectedFixes, &ImportFix{ + StmtInfo: ImportInfo{ + Name: p.importSpecName(imp), + ImportPath: imp.ImportPath, + }, + IdentName: p.importIdentifier(imp), + FixType: AddImport, + }) + } + sortFixes(selectedFixes) + + return append(fixes, selectedFixes...), true +} + +func sortFixes(fixes []*ImportFix) { + sort.Slice(fixes, func(i, j int) bool { + fi, fj := fixes[i], fixes[j] + if fi.StmtInfo.ImportPath != fj.StmtInfo.ImportPath { + return fi.StmtInfo.ImportPath < fj.StmtInfo.ImportPath + } + if fi.StmtInfo.Name != fj.StmtInfo.Name { + return fi.StmtInfo.Name < fj.StmtInfo.Name + } + if fi.IdentName != fj.IdentName { + return fi.IdentName < fj.IdentName + } + return fi.FixType < fj.FixType + }) +} + +// importSpecName gets the import name of imp in the import spec. +// +// When the import identifier matches the assumed import name, the import name does +// not appear in the import spec. +func (p *pass) importSpecName(imp *ImportInfo) string { + // If we did not load the real package names, or the name is already set, + // we just return the existing name. + if !p.loadRealPackageNames || imp.Name != "" { + return imp.Name + } + + ident := p.importIdentifier(imp) + if ident == ImportPathToAssumedName(imp.ImportPath) { + return "" // ident not needed since the assumed and real names are the same. + } + return ident +} + +// apply will perform the fixes on f in order. +func apply(fset *token.FileSet, f *ast.File, fixes []*ImportFix) { + for _, fix := range fixes { + switch fix.FixType { + case DeleteImport: + astutil.DeleteNamedImport(fset, f, fix.StmtInfo.Name, fix.StmtInfo.ImportPath) + case AddImport: + astutil.AddNamedImport(fset, f, fix.StmtInfo.Name, fix.StmtInfo.ImportPath) + case SetImportName: + // Find the matching import path and change the name. + for _, spec := range f.Imports { + path := strings.Trim(spec.Path.Value, `"`) + if path == fix.StmtInfo.ImportPath { + spec.Name = &ast.Ident{ + Name: fix.StmtInfo.Name, + NamePos: spec.Pos(), + } + } + } + } + } +} + +// assumeSiblingImportsValid assumes that siblings' use of packages is valid, +// adding the exports they use. +func (p *pass) assumeSiblingImportsValid() { + for _, f := range p.otherFiles { + refs := collectReferences(f) + imports := collectImports(f) + importsByName := map[string]*ImportInfo{} + for _, imp := range imports { + importsByName[p.importIdentifier(imp)] = imp + } + for left, rights := range refs { + if imp, ok := importsByName[left]; ok { + if m, ok := stdlib.PackageSymbols[imp.ImportPath]; ok { + // We have the stdlib in memory; no need to guess. + rights = symbolNameSet(m) + } + // TODO(rfindley): we should set package name here, for consistency. + p.addCandidate(imp, &PackageInfo{ + // no name; we already know it. + Exports: rights, + }) + } + } + } +} + +// addCandidate adds a candidate import to p, and merges in the information +// in pkg. +func (p *pass) addCandidate(imp *ImportInfo, pkg *PackageInfo) { + p.candidates = append(p.candidates, imp) + if existing, ok := p.knownPackages[imp.ImportPath]; ok { + if existing.Name == "" { + existing.Name = pkg.Name + } + for export := range pkg.Exports { + existing.Exports[export] = true + } + } else { + p.knownPackages[imp.ImportPath] = pkg + } +} + +// fixImports adds and removes imports from f so that all its references are +// satisfied and there are no unused imports. +// +// This is declared as a variable rather than a function so goimports can +// easily be extended by adding a file with an init function. +// +// DO NOT REMOVE: used internally at Google. +var fixImports = fixImportsDefault + +func fixImportsDefault(fset *token.FileSet, f *ast.File, filename string, env *ProcessEnv) error { + fixes, err := getFixes(context.Background(), fset, f, filename, env) + if err != nil { + return err + } + apply(fset, f, fixes) + return nil +} + +// getFixes gets the import fixes that need to be made to f in order to fix the imports. +// It does not modify the ast. +func getFixes(ctx context.Context, fset *token.FileSet, f *ast.File, filename string, env *ProcessEnv) ([]*ImportFix, error) { + source, err := NewProcessEnvSource(env, filename, f.Name.Name) + if err != nil { + return nil, err + } + goEnv, err := env.goEnv() + if err != nil { + return nil, err + } + return getFixesWithSource(ctx, fset, f, filename, goEnv["GOROOT"], env.logf, source) +} + +func getFixesWithSource(ctx context.Context, fset *token.FileSet, f *ast.File, filename string, goroot string, logf func(string, ...any), source Source) ([]*ImportFix, error) { + // This logic is defensively duplicated from getFixes. + abs, err := filepath.Abs(filename) + if err != nil { + return nil, err + } + srcDir := filepath.Dir(abs) + + if logf != nil { + logf("fixImports(filename=%q), srcDir=%q ...", filename, srcDir) + } + + // First pass: looking only at f, and using the naive algorithm to + // derive package names from import paths, see if the file is already + // complete. We can't add any imports yet, because we don't know + // if missing references are actually package vars. + p := &pass{ + fset: fset, + f: f, + srcDir: srcDir, + logf: logf, + goroot: goroot, + source: source, + } + if fixes, done := p.load(ctx); done { + return fixes, nil + } + + otherFiles, err := parseOtherFiles(ctx, fset, srcDir, filename) + if err != nil { + return nil, err + } + + // Second pass: add information from other files in the same package, + // like their package vars and imports. + p.otherFiles = otherFiles + if fixes, done := p.load(ctx); done { + return fixes, nil + } + + // Now we can try adding imports from the stdlib. + p.assumeSiblingImportsValid() + addStdlibCandidates(p, p.missingRefs) + if fixes, done := p.fix(); done { + return fixes, nil + } + + // Third pass: get real package names where we had previously used + // the naive algorithm. + p = &pass{ + fset: fset, + f: f, + srcDir: srcDir, + logf: logf, + goroot: goroot, + source: p.source, // safe to reuse, as it's just a wrapper around env + } + p.loadRealPackageNames = true + p.otherFiles = otherFiles + if fixes, done := p.load(ctx); done { + return fixes, nil + } + + if err := addStdlibCandidates(p, p.missingRefs); err != nil { + return nil, err + } + p.assumeSiblingImportsValid() + if fixes, done := p.fix(); done { + return fixes, nil + } + + // Go look for candidates in $GOPATH, etc. We don't necessarily load + // the real exports of sibling imports, so keep assuming their contents. + if err := addExternalCandidates(ctx, p, p.missingRefs, filename); err != nil { + return nil, err + } + + p.lastTry = true + fixes, _ := p.fix() + return fixes, nil +} + +// MaxRelevance is the highest relevance, used for the standard library. +// Chosen arbitrarily to match pre-existing gopls code. +const MaxRelevance = 7.0 + +// getCandidatePkgs works with the passed callback to find all acceptable packages. +// It deduplicates by import path, and uses a cached stdlib rather than reading +// from disk. +func getCandidatePkgs(ctx context.Context, wrappedCallback *scanCallback, filename, filePkg string, env *ProcessEnv) error { + notSelf := func(p *pkg) bool { + return p.packageName != filePkg || p.dir != filepath.Dir(filename) + } + goenv, err := env.goEnv() + if err != nil { + return err + } + + var mu sync.Mutex // to guard asynchronous access to dupCheck + dupCheck := map[string]struct{}{} + + // Start off with the standard library. + for importPath, symbols := range stdlib.PackageSymbols { + p := &pkg{ + dir: filepath.Join(goenv["GOROOT"], "src", importPath), + importPathShort: importPath, + packageName: path.Base(importPath), + relevance: MaxRelevance, + } + dupCheck[importPath] = struct{}{} + if notSelf(p) && wrappedCallback.dirFound(p) && wrappedCallback.packageNameLoaded(p) { + var exports []stdlib.Symbol + for _, sym := range symbols { + switch sym.Kind { + case stdlib.Func, stdlib.Type, stdlib.Var, stdlib.Const: + exports = append(exports, sym) + } + } + wrappedCallback.exportsLoaded(p, exports) + } + } + + scanFilter := &scanCallback{ + rootFound: func(root gopathwalk.Root) bool { + // Exclude goroot results -- getting them is relatively expensive, not cached, + // and generally redundant with the in-memory version. + return root.Type != gopathwalk.RootGOROOT && wrappedCallback.rootFound(root) + }, + dirFound: wrappedCallback.dirFound, + packageNameLoaded: func(pkg *pkg) bool { + mu.Lock() + defer mu.Unlock() + if _, ok := dupCheck[pkg.importPathShort]; ok { + return false + } + dupCheck[pkg.importPathShort] = struct{}{} + return notSelf(pkg) && wrappedCallback.packageNameLoaded(pkg) + }, + exportsLoaded: func(pkg *pkg, exports []stdlib.Symbol) { + // If we're an x_test, load the package under test's test variant. + if strings.HasSuffix(filePkg, "_test") && pkg.dir == filepath.Dir(filename) { + var err error + _, exports, err = loadExportsFromFiles(ctx, env, pkg.dir, true) + if err != nil { + return + } + } + wrappedCallback.exportsLoaded(pkg, exports) + }, + } + resolver, err := env.GetResolver() + if err != nil { + return err + } + return resolver.scan(ctx, scanFilter) +} + +func ScoreImportPaths(ctx context.Context, env *ProcessEnv, paths []string) (map[string]float64, error) { + result := make(map[string]float64) + resolver, err := env.GetResolver() + if err != nil { + return nil, err + } + for _, path := range paths { + result[path] = resolver.scoreImportPath(ctx, path) + } + return result, nil +} + +func PrimeCache(ctx context.Context, resolver Resolver) error { + // Fully scan the disk for directories, but don't actually read any Go files. + callback := &scanCallback{ + rootFound: func(root gopathwalk.Root) bool { + // See getCandidatePkgs: walking GOROOT is apparently expensive and + // unnecessary. + return root.Type != gopathwalk.RootGOROOT + }, + dirFound: func(pkg *pkg) bool { + return false + }, + // packageNameLoaded and exportsLoaded must never be called. + } + + return resolver.scan(ctx, callback) +} + +func candidateImportName(pkg *pkg) string { + if ImportPathToAssumedName(pkg.importPathShort) != pkg.packageName { + return pkg.packageName + } + return "" +} + +// GetAllCandidates calls wrapped for each package whose name starts with +// searchPrefix, and can be imported from filename with the package name filePkg. +// +// Beware that the wrapped function may be called multiple times concurrently. +// TODO(adonovan): encapsulate the concurrency. +func GetAllCandidates(ctx context.Context, wrapped func(ImportFix), searchPrefix, filename, filePkg string, env *ProcessEnv) error { + callback := &scanCallback{ + rootFound: func(gopathwalk.Root) bool { + return true + }, + dirFound: func(pkg *pkg) bool { + if !CanUse(filename, pkg.dir) { + return false + } + // Try the assumed package name first, then a simpler path match + // in case of packages named vN, which are not uncommon. + return strings.HasPrefix(ImportPathToAssumedName(pkg.importPathShort), searchPrefix) || + strings.HasPrefix(path.Base(pkg.importPathShort), searchPrefix) + }, + packageNameLoaded: func(pkg *pkg) bool { + if !strings.HasPrefix(pkg.packageName, searchPrefix) { + return false + } + wrapped(ImportFix{ + StmtInfo: ImportInfo{ + ImportPath: pkg.importPathShort, + Name: candidateImportName(pkg), + }, + IdentName: pkg.packageName, + FixType: AddImport, + Relevance: pkg.relevance, + }) + return false + }, + } + return getCandidatePkgs(ctx, callback, filename, filePkg, env) +} + +// GetImportPaths calls wrapped for each package whose import path starts with +// searchPrefix, and can be imported from filename with the package name filePkg. +func GetImportPaths(ctx context.Context, wrapped func(ImportFix), searchPrefix, filename, filePkg string, env *ProcessEnv) error { + callback := &scanCallback{ + rootFound: func(gopathwalk.Root) bool { + return true + }, + dirFound: func(pkg *pkg) bool { + if !CanUse(filename, pkg.dir) { + return false + } + return strings.HasPrefix(pkg.importPathShort, searchPrefix) + }, + packageNameLoaded: func(pkg *pkg) bool { + wrapped(ImportFix{ + StmtInfo: ImportInfo{ + ImportPath: pkg.importPathShort, + Name: candidateImportName(pkg), + }, + IdentName: pkg.packageName, + FixType: AddImport, + Relevance: pkg.relevance, + }) + return false + }, + } + return getCandidatePkgs(ctx, callback, filename, filePkg, env) +} + +// A PackageExport is a package and its exports. +type PackageExport struct { + Fix *ImportFix + Exports []stdlib.Symbol +} + +// GetPackageExports returns all known packages with name pkg and their exports. +func GetPackageExports(ctx context.Context, wrapped func(PackageExport), searchPkg, filename, filePkg string, env *ProcessEnv) error { + callback := &scanCallback{ + rootFound: func(gopathwalk.Root) bool { + return true + }, + dirFound: func(pkg *pkg) bool { + return pkgIsCandidate(filename, References{searchPkg: nil}, pkg) + }, + packageNameLoaded: func(pkg *pkg) bool { + return pkg.packageName == searchPkg + }, + exportsLoaded: func(pkg *pkg, exports []stdlib.Symbol) { + sortSymbols(exports) + wrapped(PackageExport{ + Fix: &ImportFix{ + StmtInfo: ImportInfo{ + ImportPath: pkg.importPathShort, + Name: candidateImportName(pkg), + }, + IdentName: pkg.packageName, + FixType: AddImport, + Relevance: pkg.relevance, + }, + Exports: exports, + }) + }, + } + return getCandidatePkgs(ctx, callback, filename, filePkg, env) +} + +// TODO(rfindley): we should depend on GOOS and GOARCH, to provide accurate +// imports when doing cross-platform development. +var requiredGoEnvVars = []string{ + "GO111MODULE", + "GOFLAGS", + "GOINSECURE", + "GOMOD", + "GOMODCACHE", + "GONOPROXY", + "GONOSUMDB", + "GOPATH", + "GOPROXY", + "GOROOT", + "GOSUMDB", + "GOWORK", +} + +// ProcessEnv contains environment variables and settings that affect the use of +// the go command, the go/build package, etc. +// +// ...a ProcessEnv *also* overwrites its Env along with derived state in the +// form of the resolver. And because it is lazily initialized, an env may just +// be broken and unusable, but there is no way for the caller to detect that: +// all queries will just fail. +// +// TODO(rfindley): refactor this package so that this type (perhaps renamed to +// just Env or Config) is an immutable configuration struct, to be exchanged +// for an initialized object via a constructor that returns an error. Perhaps +// the signature should be `func NewResolver(*Env) (*Resolver, error)`, where +// resolver is a concrete type used for resolving imports. Via this +// refactoring, we can avoid the need to call ProcessEnv.init and +// ProcessEnv.GoEnv everywhere, and implicitly fix all the places where this +// these are misused. Also, we'd delegate the caller the decision of how to +// handle a broken environment. +type ProcessEnv struct { + GocmdRunner *gocommand.Runner + + BuildFlags []string + ModFlag string + + // SkipPathInScan returns true if the path should be skipped from scans of + // the RootCurrentModule root type. The function argument is a clean, + // absolute path. + SkipPathInScan func(string) bool + + // Env overrides the OS environment, and can be used to specify + // GOPROXY, GO111MODULE, etc. PATH cannot be set here, because + // exec.Command will not honor it. + // Specifying all of requiredGoEnvVars avoids a call to `go env`. + Env map[string]string + + WorkingDir string + + // If Logf is non-nil, debug logging is enabled through this function. + Logf func(format string, args ...any) + + // If set, ModCache holds a shared cache of directory info to use across + // multiple ProcessEnvs. + ModCache *DirInfoCache + + initialized bool // see TODO above + + // resolver and resolverErr are lazily evaluated (see GetResolver). + // This is unclean, but see the big TODO in the docstring for ProcessEnv + // above: for now, we can't be sure that the ProcessEnv is fully initialized. + resolver Resolver + resolverErr error +} + +func (e *ProcessEnv) goEnv() (map[string]string, error) { + if err := e.init(); err != nil { + return nil, err + } + return e.Env, nil +} + +func (e *ProcessEnv) matchFile(dir, name string) (bool, error) { + bctx, err := e.buildContext() + if err != nil { + return false, err + } + return bctx.MatchFile(dir, name) +} + +// CopyConfig copies the env's configuration into a new env. +func (e *ProcessEnv) CopyConfig() *ProcessEnv { + copy := &ProcessEnv{ + GocmdRunner: e.GocmdRunner, + initialized: e.initialized, + BuildFlags: e.BuildFlags, + Logf: e.Logf, + WorkingDir: e.WorkingDir, + resolver: nil, + Env: map[string]string{}, + } + maps.Copy(copy.Env, e.Env) + return copy +} + +func (e *ProcessEnv) init() error { + if e.initialized { + return nil + } + + foundAllRequired := true + for _, k := range requiredGoEnvVars { + if _, ok := e.Env[k]; !ok { + foundAllRequired = false + break + } + } + if foundAllRequired { + e.initialized = true + return nil + } + + if e.Env == nil { + e.Env = map[string]string{} + } + + goEnv := map[string]string{} + stdout, err := e.invokeGo(context.TODO(), "env", append([]string{"-json"}, requiredGoEnvVars...)...) + if err != nil { + return err + } + if err := json.Unmarshal(stdout.Bytes(), &goEnv); err != nil { + return err + } + maps.Copy(e.Env, goEnv) + e.initialized = true + return nil +} + +func (e *ProcessEnv) env() []string { + var env []string // the gocommand package will prepend os.Environ. + for k, v := range e.Env { + env = append(env, k+"="+v) + } + return env +} + +func (e *ProcessEnv) GetResolver() (Resolver, error) { + if err := e.init(); err != nil { + return nil, err + } + + if e.resolver == nil && e.resolverErr == nil { + // TODO(rfindley): we should only use a gopathResolver here if the working + // directory is actually *in* GOPATH. (I seem to recall an open gopls issue + // for this behavior, but I can't find it). + // + // For gopls, we can optionally explicitly choose a resolver type, since we + // already know the view type. + if e.Env["GOMOD"] == "" && (e.Env["GOWORK"] == "" || e.Env["GOWORK"] == "off") { + e.resolver = newGopathResolver(e) + e.logf("created gopath resolver") + } else if r, err := newModuleResolver(e, e.ModCache); err != nil { + e.resolverErr = err + e.logf("failed to create module resolver: %v", err) + } else { + e.resolver = Resolver(r) + e.logf("created module resolver") + } + } + + return e.resolver, e.resolverErr +} + +// logf logs if e.Logf is non-nil. +func (e *ProcessEnv) logf(format string, args ...any) { + if e.Logf != nil { + e.Logf(format, args...) + } +} + +// buildContext returns the build.Context to use for matching files. +// +// TODO(rfindley): support dynamic GOOS, GOARCH here, when doing cross-platform +// development. +func (e *ProcessEnv) buildContext() (*build.Context, error) { + ctx := build.Default + goenv, err := e.goEnv() + if err != nil { + return nil, err + } + ctx.GOROOT = goenv["GOROOT"] + ctx.GOPATH = goenv["GOPATH"] + + // As of Go 1.14, build.Context has a Dir field + // (see golang.org/issue/34860). + // Populate it only if present. + rc := reflect.ValueOf(&ctx).Elem() + dir := rc.FieldByName("Dir") + if dir.IsValid() && dir.Kind() == reflect.String { + dir.SetString(e.WorkingDir) + } + + // Since Go 1.11, go/build.Context.Import may invoke 'go list' depending on + // the value in GO111MODULE in the process's environment. We always want to + // run in GOPATH mode when calling Import, so we need to prevent this from + // happening. In Go 1.16, GO111MODULE defaults to "on", so this problem comes + // up more frequently. + // + // HACK: setting any of the Context I/O hooks prevents Import from invoking + // 'go list', regardless of GO111MODULE. This is undocumented, but it's + // unlikely to change before GOPATH support is removed. + ctx.ReadDir = ioutil.ReadDir + + return &ctx, nil +} + +func (e *ProcessEnv) invokeGo(ctx context.Context, verb string, args ...string) (*bytes.Buffer, error) { + inv := gocommand.Invocation{ + Verb: verb, + Args: args, + BuildFlags: e.BuildFlags, + Env: e.env(), + Logf: e.Logf, + WorkingDir: e.WorkingDir, + } + return e.GocmdRunner.Run(ctx, inv) +} + +func addStdlibCandidates(pass *pass, refs References) error { + localbase := func(nm string) string { + ans := path.Base(nm) + if ans[0] == 'v' { + // this is called, for instance, with math/rand/v2 and returns rand/v2 + if _, err := strconv.Atoi(ans[1:]); err == nil { + ix := strings.LastIndex(nm, ans) + more := path.Base(nm[:ix]) + ans = path.Join(more, ans) + } + } + return ans + } + add := func(pkg string) { + // Prevent self-imports. + if path.Base(pkg) == pass.f.Name.Name && filepath.Join(pass.goroot, "src", pkg) == pass.srcDir { + return + } + exports := symbolNameSet(stdlib.PackageSymbols[pkg]) + pass.addCandidate( + &ImportInfo{ImportPath: pkg}, + &PackageInfo{Name: localbase(pkg), Exports: exports}) + } + for left := range refs { + if left == "rand" { + // Make sure we try crypto/rand before any version of math/rand as both have Int() + // and our policy is to recommend crypto + add("crypto/rand") + // if the user's no later than go1.21, this should be "math/rand" + // but we have no way of figuring out what the user is using + // TODO: investigate using the toolchain version to disambiguate in the stdlib + add("math/rand/v2") + // math/rand has an overlapping API + // TestIssue66407 fails without this + add("math/rand") + continue + } + for importPath := range stdlib.PackageSymbols { + if path.Base(importPath) == left { + add(importPath) + } + } + } + return nil +} + +// A Resolver does the build-system-specific parts of goimports. +type Resolver interface { + // loadPackageNames loads the package names in importPaths. + loadPackageNames(importPaths []string, srcDir string) (map[string]string, error) + + // scan works with callback to search for packages. See scanCallback for details. + scan(ctx context.Context, callback *scanCallback) error + + // loadExports returns the package name and set of exported symbols in the + // package at dir. loadExports may be called concurrently. + loadExports(ctx context.Context, pkg *pkg, includeTest bool) (string, []stdlib.Symbol, error) + + // scoreImportPath returns the relevance for an import path. + scoreImportPath(ctx context.Context, path string) float64 + + // ClearForNewScan returns a new Resolver based on the receiver that has + // cleared its internal caches of directory contents. + // + // The new resolver should be primed and then set via + // [ProcessEnv.UpdateResolver]. + ClearForNewScan() Resolver +} + +// A scanCallback controls a call to scan and receives its results. +// In general, minor errors will be silently discarded; a user should not +// expect to receive a full series of calls for everything. +type scanCallback struct { + // rootFound is called before scanning a new root dir. If it returns true, + // the root will be scanned. Returning false will not necessarily prevent + // directories from that root making it to dirFound. + rootFound func(gopathwalk.Root) bool + // dirFound is called when a directory is found that is possibly a Go package. + // pkg will be populated with everything except packageName. + // If it returns true, the package's name will be loaded. + dirFound func(pkg *pkg) bool + // packageNameLoaded is called when a package is found and its name is loaded. + // If it returns true, the package's exports will be loaded. + packageNameLoaded func(pkg *pkg) bool + // exportsLoaded is called when a package's exports have been loaded. + exportsLoaded func(pkg *pkg, exports []stdlib.Symbol) +} + +func addExternalCandidates(ctx context.Context, pass *pass, refs References, filename string) error { + ctx, done := event.Start(ctx, "imports.addExternalCandidates") + defer done() + + results, err := pass.source.ResolveReferences(ctx, filename, refs) + if err != nil { + return err + } + + for _, result := range results { + if result == nil { + continue + } + // Don't offer completions that would shadow predeclared + // names, such as github.com/coreos/etcd/error. + if types.Universe.Lookup(result.Package.Name) != nil { // predeclared + // Ideally we would skip this candidate only + // if the predeclared name is actually + // referenced by the file, but that's a lot + // trickier to compute and would still create + // an import that is likely to surprise the + // user before long. + continue + } + pass.addCandidate(result.Import, result.Package) + } + return nil +} + +// notIdentifier reports whether ch is an invalid identifier character. +func notIdentifier(ch rune) bool { + return !('a' <= ch && ch <= 'z' || 'A' <= ch && ch <= 'Z' || + '0' <= ch && ch <= '9' || + ch == '_' || + ch >= utf8.RuneSelf && (unicode.IsLetter(ch) || unicode.IsDigit(ch))) +} + +// ImportPathToAssumedName returns the assumed package name of an import path. +// It does this using only string parsing of the import path. +// It picks the last element of the path that does not look like a major +// version, and then picks the valid identifier off the start of that element. +// It is used to determine if a local rename should be added to an import for +// clarity. +// This function could be moved to a standard package and exported if we want +// for use in other tools. +func ImportPathToAssumedName(importPath string) string { + base := path.Base(importPath) + if strings.HasPrefix(base, "v") { + if _, err := strconv.Atoi(base[1:]); err == nil { + dir := path.Dir(importPath) + if dir != "." { + base = path.Base(dir) + } + } + } + base = strings.TrimPrefix(base, "go-") + if i := strings.IndexFunc(base, notIdentifier); i >= 0 { + base = base[:i] + } + return base +} + +// gopathResolver implements resolver for GOPATH workspaces. +type gopathResolver struct { + env *ProcessEnv + cache *DirInfoCache + scanSema chan struct{} // scanSema prevents concurrent scans. +} + +func newGopathResolver(env *ProcessEnv) *gopathResolver { + r := &gopathResolver{ + env: env, + cache: NewDirInfoCache(), + scanSema: make(chan struct{}, 1), + } + r.scanSema <- struct{}{} + return r +} + +func (r *gopathResolver) ClearForNewScan() Resolver { + return newGopathResolver(r.env) +} + +func (r *gopathResolver) loadPackageNames(importPaths []string, srcDir string) (map[string]string, error) { + names := map[string]string{} + bctx, err := r.env.buildContext() + if err != nil { + return nil, err + } + for _, path := range importPaths { + names[path] = importPathToName(bctx, path, srcDir) + } + return names, nil +} + +// importPathToName finds out the actual package name, as declared in its .go files. +func importPathToName(bctx *build.Context, importPath, srcDir string) string { + // Fast path for standard library without going to disk. + if stdlib.HasPackage(importPath) { + return path.Base(importPath) // stdlib packages always match their paths. + } + + buildPkg, err := bctx.Import(importPath, srcDir, build.FindOnly) + if err != nil { + return "" + } + pkgName, err := packageDirToName(buildPkg.Dir) + if err != nil { + return "" + } + return pkgName +} + +// packageDirToName is a faster version of build.Import if +// the only thing desired is the package name. Given a directory, +// packageDirToName then only parses one file in the package, +// trusting that the files in the directory are consistent. +func packageDirToName(dir string) (packageName string, err error) { + d, err := os.Open(dir) + if err != nil { + return "", err + } + names, err := d.Readdirnames(-1) + d.Close() + if err != nil { + return "", err + } + sort.Strings(names) // to have predictable behavior + var lastErr error + var nfile int + for _, name := range names { + if !strings.HasSuffix(name, ".go") { + continue + } + if strings.HasSuffix(name, "_test.go") { + continue + } + nfile++ + fullFile := filepath.Join(dir, name) + + fset := token.NewFileSet() + f, err := parser.ParseFile(fset, fullFile, nil, parser.PackageClauseOnly) + if err != nil { + lastErr = err + continue + } + pkgName := f.Name.Name + if pkgName == "documentation" { + // Special case from go/build.ImportDir, not + // handled by ctx.MatchFile. + continue + } + if pkgName == "main" { + // Also skip package main, assuming it's a +build ignore generator or example. + // Since you can't import a package main anyway, there's no harm here. + continue + } + return pkgName, nil + } + if lastErr != nil { + return "", lastErr + } + return "", fmt.Errorf("no importable package found in %d Go files", nfile) +} + +type pkg struct { + dir string // absolute file path to pkg directory ("/usr/lib/go/src/net/http") + importPathShort string // vendorless import path ("net/http", "a/b") + packageName string // package name loaded from source if requested + relevance float64 // a weakly-defined score of how relevant a package is. 0 is most relevant. +} + +type pkgDistance struct { + pkg *pkg + distance int // relative distance to target +} + +// byDistanceOrImportPathShortLength sorts by relative distance breaking ties +// on the short import path length and then the import string itself. +type byDistanceOrImportPathShortLength []pkgDistance + +func (s byDistanceOrImportPathShortLength) Len() int { return len(s) } +func (s byDistanceOrImportPathShortLength) Less(i, j int) bool { + di, dj := s[i].distance, s[j].distance + if di == -1 { + return false + } + if dj == -1 { + return true + } + if di != dj { + return di < dj + } + + vi, vj := s[i].pkg.importPathShort, s[j].pkg.importPathShort + if len(vi) != len(vj) { + return len(vi) < len(vj) + } + return vi < vj +} +func (s byDistanceOrImportPathShortLength) Swap(i, j int) { s[i], s[j] = s[j], s[i] } + +func distance(basepath, targetpath string) int { + p, err := filepath.Rel(basepath, targetpath) + if err != nil { + return -1 + } + if p == "." { + return 0 + } + return strings.Count(p, string(filepath.Separator)) + 1 +} + +func (r *gopathResolver) scan(ctx context.Context, callback *scanCallback) error { + add := func(root gopathwalk.Root, dir string) { + // We assume cached directories have not changed. We can skip them and their + // children. + if _, ok := r.cache.Load(dir); ok { + return + } + + importpath := filepath.ToSlash(dir[len(root.Path)+len("/"):]) + info := directoryPackageInfo{ + status: directoryScanned, + dir: dir, + rootType: root.Type, + nonCanonicalImportPath: VendorlessPath(importpath), + } + r.cache.Store(dir, info) + } + processDir := func(info directoryPackageInfo) { + // Skip this directory if we were not able to get the package information successfully. + if scanned, err := info.reachedStatus(directoryScanned); !scanned || err != nil { + return + } + + p := &pkg{ + importPathShort: info.nonCanonicalImportPath, + dir: info.dir, + relevance: MaxRelevance - 1, + } + if info.rootType == gopathwalk.RootGOROOT { + p.relevance = MaxRelevance + } + + if !callback.dirFound(p) { + return + } + var err error + p.packageName, err = r.cache.CachePackageName(info) + if err != nil { + return + } + + if !callback.packageNameLoaded(p) { + return + } + if _, exports, err := r.loadExports(ctx, p, false); err == nil { + callback.exportsLoaded(p, exports) + } + } + stop := r.cache.ScanAndListen(ctx, processDir) + defer stop() + + goenv, err := r.env.goEnv() + if err != nil { + return err + } + var roots []gopathwalk.Root + roots = append(roots, gopathwalk.Root{Path: filepath.Join(goenv["GOROOT"], "src"), Type: gopathwalk.RootGOROOT}) + for _, p := range filepath.SplitList(goenv["GOPATH"]) { + roots = append(roots, gopathwalk.Root{Path: filepath.Join(p, "src"), Type: gopathwalk.RootGOPATH}) + } + // The callback is not necessarily safe to use in the goroutine below. Process roots eagerly. + roots = filterRoots(roots, callback.rootFound) + // We can't cancel walks, because we need them to finish to have a usable + // cache. Instead, run them in a separate goroutine and detach. + scanDone := make(chan struct{}) + go func() { + select { + case <-ctx.Done(): + return + case <-r.scanSema: + } + defer func() { r.scanSema <- struct{}{} }() + gopathwalk.Walk(roots, add, gopathwalk.Options{Logf: r.env.Logf, ModulesEnabled: false}) + close(scanDone) + }() + select { + case <-ctx.Done(): + case <-scanDone: + } + return nil +} + +func (r *gopathResolver) scoreImportPath(ctx context.Context, path string) float64 { + if stdlib.HasPackage(path) { + return MaxRelevance + } + return MaxRelevance - 1 +} + +func filterRoots(roots []gopathwalk.Root, include func(gopathwalk.Root) bool) []gopathwalk.Root { + var result []gopathwalk.Root + for _, root := range roots { + if !include(root) { + continue + } + result = append(result, root) + } + return result +} + +func (r *gopathResolver) loadExports(ctx context.Context, pkg *pkg, includeTest bool) (string, []stdlib.Symbol, error) { + if info, ok := r.cache.Load(pkg.dir); ok && !includeTest { + return r.cache.CacheExports(ctx, r.env, info) + } + return loadExportsFromFiles(ctx, r.env, pkg.dir, includeTest) +} + +// VendorlessPath returns the devendorized version of the import path ipath. +// For example, VendorlessPath("foo/bar/vendor/a/b") returns "a/b". +func VendorlessPath(ipath string) string { + // Devendorize for use in import statement. + if i := strings.LastIndex(ipath, "/vendor/"); i >= 0 { + return ipath[i+len("/vendor/"):] + } + if strings.HasPrefix(ipath, "vendor/") { + return ipath[len("vendor/"):] + } + return ipath +} + +func loadExportsFromFiles(ctx context.Context, env *ProcessEnv, dir string, includeTest bool) (string, []stdlib.Symbol, error) { + // Look for non-test, buildable .go files which could provide exports. + all, err := os.ReadDir(dir) + if err != nil { + return "", nil, err + } + var files []fs.DirEntry + for _, fi := range all { + name := fi.Name() + if !strings.HasSuffix(name, ".go") || (!includeTest && strings.HasSuffix(name, "_test.go")) { + continue + } + match, err := env.matchFile(dir, fi.Name()) + if err != nil || !match { + continue + } + files = append(files, fi) + } + + if len(files) == 0 { + return "", nil, fmt.Errorf("dir %v contains no buildable, non-test .go files", dir) + } + + var pkgName string + var exports []stdlib.Symbol + fset := token.NewFileSet() + for _, fi := range files { + select { + case <-ctx.Done(): + return "", nil, ctx.Err() + default: + } + + fullFile := filepath.Join(dir, fi.Name()) + // Legacy ast.Object resolution is needed here. + f, err := parser.ParseFile(fset, fullFile, nil, 0) + if err != nil { + env.logf("error parsing %v: %v", fullFile, err) + continue + } + if f.Name.Name == "documentation" { + // Special case from go/build.ImportDir, not + // handled by MatchFile above. + continue + } + if includeTest && strings.HasSuffix(f.Name.Name, "_test") { + // x_test package. We want internal test files only. + continue + } + pkgName = f.Name.Name + for name, obj := range f.Scope.Objects { + if ast.IsExported(name) { + var kind stdlib.Kind + switch obj.Kind { + case ast.Con: + kind = stdlib.Const + case ast.Typ: + kind = stdlib.Type + case ast.Var: + kind = stdlib.Var + case ast.Fun: + kind = stdlib.Func + } + exports = append(exports, stdlib.Symbol{ + Name: name, + Kind: kind, + Version: 0, // unknown; be permissive + }) + } + } + } + sortSymbols(exports) + + env.logf("loaded exports in dir %v (package %v): %v", dir, pkgName, exports) + return pkgName, exports, nil +} + +func sortSymbols(syms []stdlib.Symbol) { + sort.Slice(syms, func(i, j int) bool { + return syms[i].Name < syms[j].Name + }) +} + +// A symbolSearcher searches for a package with a set of symbols, among a set +// of candidates. See [symbolSearcher.search]. +// +// The search occurs within the scope of a single file, with context captured +// in srcDir and xtest. +type symbolSearcher struct { + logf func(string, ...any) + srcDir string // directory containing the file + xtest bool // if set, the file containing is an x_test file + loadExports func(ctx context.Context, pkg *pkg, includeTest bool) (string, []stdlib.Symbol, error) +} + +// search searches the provided candidates for a package containing all +// exported symbols. +// +// If successful, returns the resulting package. +func (s *symbolSearcher) search(ctx context.Context, candidates []pkgDistance, pkgName string, symbols map[string]bool) (*pkg, error) { + // Sort the candidates by their import package length, + // assuming that shorter package names are better than long + // ones. Note that this sorts by the de-vendored name, so + // there's no "penalty" for vendoring. + sort.Sort(byDistanceOrImportPathShortLength(candidates)) + if s.logf != nil { + for i, c := range candidates { + s.logf("%s candidate %d/%d: %v in %v", pkgName, i+1, len(candidates), c.pkg.importPathShort, c.pkg.dir) + } + } + + // Arrange rescv so that we can we can await results in order of relevance + // and exit as soon as we find the first match. + // + // Search with bounded concurrency, returning as soon as the first result + // among rescv is non-nil. + rescv := make([]chan *pkg, len(candidates)) + for i := range candidates { + rescv[i] = make(chan *pkg, 1) + } + const maxConcurrentPackageImport = 4 + loadExportsSem := make(chan struct{}, maxConcurrentPackageImport) + + // Ensure that all work is completed at exit. + ctx, cancel := context.WithCancel(ctx) + var wg sync.WaitGroup + defer func() { + cancel() + wg.Wait() + }() + + // Start the search. + wg.Add(1) + go func() { + defer wg.Done() + for i, c := range candidates { + select { + case loadExportsSem <- struct{}{}: + case <-ctx.Done(): + return + } + + i := i + c := c + wg.Add(1) + go func() { + defer func() { + <-loadExportsSem + wg.Done() + }() + if s.logf != nil { + s.logf("loading exports in dir %s (seeking package %s)", c.pkg.dir, pkgName) + } + pkg, err := s.searchOne(ctx, c, symbols) + if err != nil { + if s.logf != nil && ctx.Err() == nil { + s.logf("loading exports in dir %s (seeking package %s): %v", c.pkg.dir, pkgName, err) + } + pkg = nil + } + rescv[i] <- pkg // may be nil + }() + } + }() + + // Await the first (best) result. + for _, resc := range rescv { + select { + case r := <-resc: + if r != nil { + return r, nil + } + case <-ctx.Done(): + return nil, ctx.Err() + } + } + return nil, nil +} + +func (s *symbolSearcher) searchOne(ctx context.Context, c pkgDistance, symbols map[string]bool) (*pkg, error) { + if ctx.Err() != nil { + return nil, ctx.Err() + } + // If we're considering the package under test from an x_test, load the + // test variant. + includeTest := s.xtest && c.pkg.dir == s.srcDir + _, exports, err := s.loadExports(ctx, c.pkg, includeTest) + if err != nil { + return nil, err + } + + exportsMap := make(map[string]bool, len(exports)) + for _, sym := range exports { + exportsMap[sym.Name] = true + } + for symbol := range symbols { + if !exportsMap[symbol] { + return nil, nil // no match + } + } + return c.pkg, nil +} + +// pkgIsCandidate reports whether pkg is a candidate for satisfying the +// finding which package pkgIdent in the file named by filename is trying +// to refer to. +// +// This check is purely lexical and is meant to be as fast as possible +// because it's run over all $GOPATH directories to filter out poor +// candidates in order to limit the CPU and I/O later parsing the +// exports in candidate packages. +// +// filename is the file being formatted. +// pkgIdent is the package being searched for, like "client" (if +// searching for "client.New") +func pkgIsCandidate(filename string, refs References, pkg *pkg) bool { + // Check "internal" and "vendor" visibility: + if !CanUse(filename, pkg.dir) { + return false + } + + // Speed optimization to minimize disk I/O: + // + // Use the matchesPath heuristic to filter to package paths that could + // reasonably match a dangling reference. + // + // This permits mismatch naming like directory "go-foo" being package "foo", + // or "pkg.v3" being "pkg", or directory + // "google.golang.org/api/cloudbilling/v1" being package "cloudbilling", but + // doesn't permit a directory "foo" to be package "bar", which is strongly + // discouraged anyway. There's no reason goimports needs to be slow just to + // accommodate that. + for pkgIdent := range refs { + if matchesPath(pkgIdent, pkg.importPathShort) { + return true + } + } + return false +} + +// CanUse reports whether the package in dir is usable from filename, +// respecting the Go "internal" and "vendor" visibility rules. +func CanUse(filename, dir string) bool { + // Fast path check, before any allocations. If it doesn't contain vendor + // or internal, it's not tricky: + // Note that this can false-negative on directories like "notinternal", + // but we check it correctly below. This is just a fast path. + if !strings.Contains(dir, "vendor") && !strings.Contains(dir, "internal") { + return true + } + + dirSlash := filepath.ToSlash(dir) + if !strings.Contains(dirSlash, "/vendor/") && !strings.Contains(dirSlash, "/internal/") && !strings.HasSuffix(dirSlash, "/internal") { + return true + } + // Vendor or internal directory only visible from children of parent. + // That means the path from the current directory to the target directory + // can contain ../vendor or ../internal but not ../foo/vendor or ../foo/internal + // or bar/vendor or bar/internal. + // After stripping all the leading ../, the only okay place to see vendor or internal + // is at the very beginning of the path. + absfile, err := filepath.Abs(filename) + if err != nil { + return false + } + absdir, err := filepath.Abs(dir) + if err != nil { + return false + } + rel, err := filepath.Rel(absfile, absdir) + if err != nil { + return false + } + relSlash := filepath.ToSlash(rel) + if i := strings.LastIndex(relSlash, "../"); i >= 0 { + relSlash = relSlash[i+len("../"):] + } + return !strings.Contains(relSlash, "/vendor/") && !strings.Contains(relSlash, "/internal/") && !strings.HasSuffix(relSlash, "/internal") +} + +// matchesPath reports whether ident may match a potential package name +// referred to by path, using heuristics to filter out unidiomatic package +// names. +// +// Specifically, it checks whether either of the last two '/'- or '\'-delimited +// path segments matches the identifier. The segment-matching heuristic must +// allow for various conventions around segment naming, including go-foo, +// foo-go, and foo.v3. To handle all of these, matching considers both (1) the +// entire segment, ignoring '-' and '.', as well as (2) the last subsegment +// separated by '-' or '.'. So the segment foo-go matches all of the following +// identifiers: foo, go, and foogo. All matches are case insensitive (for ASCII +// identifiers). +// +// See the docstring for [pkgIsCandidate] for an explanation of how this +// heuristic filters potential candidate packages. +func matchesPath(ident, path string) bool { + // Ignore case, for ASCII. + lowerIfASCII := func(b byte) byte { + if 'A' <= b && b <= 'Z' { + return b + ('a' - 'A') + } + return b + } + + // match reports whether path[start:end] matches ident, ignoring [.-]. + match := func(start, end int) bool { + ii := len(ident) - 1 // current byte in ident + pi := end - 1 // current byte in path + for ; pi >= start && ii >= 0; pi-- { + pb := path[pi] + if pb == '-' || pb == '.' { + continue + } + pb = lowerIfASCII(pb) + ib := lowerIfASCII(ident[ii]) + if pb != ib { + return false + } + ii-- + } + return ii < 0 && pi < start // all bytes matched + } + + // segmentEnd and subsegmentEnd hold the end points of the current segment + // and subsegment intervals. + segmentEnd := len(path) + subsegmentEnd := len(path) + + // Count slashes; we only care about the last two segments. + nslash := 0 + + for i := len(path) - 1; i >= 0; i-- { + switch b := path[i]; b { + // TODO(rfindley): we handle backlashes here only because the previous + // heuristic handled backslashes. This is perhaps overly defensive, but is + // the result of many lessons regarding Chesterton's fence and the + // goimports codebase. + // + // However, this function is only ever called with something called an + // 'importPath'. Is it possible that this is a real import path, and + // therefore we need only consider forward slashes? + case '/', '\\': + if match(i+1, segmentEnd) || match(i+1, subsegmentEnd) { + return true + } + nslash++ + if nslash == 2 { + return false // did not match above + } + segmentEnd, subsegmentEnd = i, i // reset + case '-', '.': + if match(i+1, subsegmentEnd) { + return true + } + subsegmentEnd = i + } + } + return match(0, segmentEnd) || match(0, subsegmentEnd) +} + +type visitFn func(node ast.Node) ast.Visitor + +func (fn visitFn) Visit(node ast.Node) ast.Visitor { + return fn(node) +} + +func symbolNameSet(symbols []stdlib.Symbol) map[string]bool { + names := make(map[string]bool) + for _, sym := range symbols { + switch sym.Kind { + case stdlib.Const, stdlib.Var, stdlib.Type, stdlib.Func: + names[sym.Name] = true + } + } + return names +} diff --git a/backend/vendor/golang.org/x/tools/internal/imports/imports.go b/backend/vendor/golang.org/x/tools/internal/imports/imports.go new file mode 100644 index 0000000..b5f5218 --- /dev/null +++ b/backend/vendor/golang.org/x/tools/internal/imports/imports.go @@ -0,0 +1,359 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package imports implements a Go pretty-printer (like package "go/format") +// that also adds or removes import statements as necessary. +package imports + +import ( + "bufio" + "bytes" + "context" + "fmt" + "go/ast" + "go/format" + "go/parser" + "go/printer" + "go/token" + "io" + "regexp" + "strconv" + "strings" + + "golang.org/x/tools/go/ast/astutil" + "golang.org/x/tools/internal/event" +) + +// Options is golang.org/x/tools/imports.Options with extra internal-only options. +type Options struct { + Env *ProcessEnv // The environment to use. Note: this contains the cached module and filesystem state. + + // LocalPrefix is a comma-separated string of import path prefixes, which, if + // set, instructs Process to sort the import paths with the given prefixes + // into another group after 3rd-party packages. + LocalPrefix string + + Fragment bool // Accept fragment of a source file (no package statement) + AllErrors bool // Report all errors (not just the first 10 on different lines) + + Comments bool // Print comments (true if nil *Options provided) + TabIndent bool // Use tabs for indent (true if nil *Options provided) + TabWidth int // Tab width (8 if nil *Options provided) + + FormatOnly bool // Disable the insertion and deletion of imports +} + +// Process implements golang.org/x/tools/imports.Process with explicit context in opt.Env. +func Process(filename string, src []byte, opt *Options) (formatted []byte, err error) { + fileSet := token.NewFileSet() + var parserMode parser.Mode + if opt.Comments { + parserMode |= parser.ParseComments + } + if opt.AllErrors { + parserMode |= parser.AllErrors + } + file, adjust, err := parse(fileSet, filename, src, parserMode, opt.Fragment) + if err != nil { + return nil, err + } + + if !opt.FormatOnly { + if err := fixImports(fileSet, file, filename, opt.Env); err != nil { + return nil, err + } + } + return formatFile(fileSet, file, src, adjust, opt) +} + +// FixImports returns a list of fixes to the imports that, when applied, +// will leave the imports in the same state as Process. src and opt must +// be specified. +// +// Note that filename's directory influences which imports can be chosen, +// so it is important that filename be accurate. +func FixImports(ctx context.Context, filename string, src []byte, goroot string, logf func(string, ...any), source Source) (fixes []*ImportFix, err error) { + ctx, done := event.Start(ctx, "imports.FixImports") + defer done() + + fileSet := token.NewFileSet() + // TODO(rfindley): these default values for ParseComments and AllErrors were + // extracted from gopls, but are they even needed? + file, _, err := parse(fileSet, filename, src, parser.ParseComments|parser.AllErrors, true) + if err != nil { + return nil, err + } + + return getFixesWithSource(ctx, fileSet, file, filename, goroot, logf, source) +} + +// ApplyFixes applies all of the fixes to the file and formats it. extraMode +// is added in when parsing the file. src and opts must be specified, but no +// env is needed. +func ApplyFixes(fixes []*ImportFix, filename string, src []byte, opt *Options, extraMode parser.Mode) (formatted []byte, err error) { + // Don't use parse() -- we don't care about fragments or statement lists + // here, and we need to work with unparsable files. + fileSet := token.NewFileSet() + parserMode := parser.SkipObjectResolution + if opt.Comments { + parserMode |= parser.ParseComments + } + if opt.AllErrors { + parserMode |= parser.AllErrors + } + parserMode |= extraMode + + file, err := parser.ParseFile(fileSet, filename, src, parserMode) + if file == nil { + return nil, err + } + + // Apply the fixes to the file. + apply(fileSet, file, fixes) + + return formatFile(fileSet, file, src, nil, opt) +} + +// formatFile formats the file syntax tree. +// It may mutate the token.FileSet and the ast.File. +// +// If an adjust function is provided, it is called after formatting +// with the original source (formatFile's src parameter) and the +// formatted file, and returns the postpocessed result. +func formatFile(fset *token.FileSet, file *ast.File, src []byte, adjust func(orig []byte, src []byte) []byte, opt *Options) ([]byte, error) { + mergeImports(file) + sortImports(opt.LocalPrefix, fset.File(file.FileStart), file) + var spacesBefore []string // import paths we need spaces before + for _, impSection := range astutil.Imports(fset, file) { + // Within each block of contiguous imports, see if any + // import lines are in different group numbers. If so, + // we'll need to put a space between them so it's + // compatible with gofmt. + lastGroup := -1 + for _, importSpec := range impSection { + importPath, _ := strconv.Unquote(importSpec.Path.Value) + groupNum := importGroup(opt.LocalPrefix, importPath) + if groupNum != lastGroup && lastGroup != -1 { + spacesBefore = append(spacesBefore, importPath) + } + lastGroup = groupNum + } + + } + + printerMode := printer.UseSpaces + if opt.TabIndent { + printerMode |= printer.TabIndent + } + printConfig := &printer.Config{Mode: printerMode, Tabwidth: opt.TabWidth} + + var buf bytes.Buffer + err := printConfig.Fprint(&buf, fset, file) + if err != nil { + return nil, err + } + out := buf.Bytes() + if adjust != nil { + out = adjust(src, out) + } + if len(spacesBefore) > 0 { + out, err = addImportSpaces(bytes.NewReader(out), spacesBefore) + if err != nil { + return nil, err + } + } + + out, err = format.Source(out) + if err != nil { + return nil, err + } + return out, nil +} + +// parse parses src, which was read from filename, +// as a Go source file or statement list. +func parse(fset *token.FileSet, filename string, src []byte, parserMode parser.Mode, fragment bool) (*ast.File, func(orig, src []byte) []byte, error) { + if parserMode&parser.SkipObjectResolution != 0 { + panic("legacy ast.Object resolution is required") + } + + // Try as whole source file. + file, err := parser.ParseFile(fset, filename, src, parserMode) + if err == nil { + return file, nil, nil + } + // If the error is that the source file didn't begin with a + // package line and we accept fragmented input, fall through to + // try as a source fragment. Stop and return on any other error. + if !fragment || !strings.Contains(err.Error(), "expected 'package'") { + return nil, nil, err + } + + // If this is a declaration list, make it a source file + // by inserting a package clause. + // Insert using a ;, not a newline, so that parse errors are on + // the correct line. + const prefix = "package main;" + psrc := append([]byte(prefix), src...) + file, err = parser.ParseFile(fset, filename, psrc, parserMode) + if err == nil { + // Gofmt will turn the ; into a \n. + // Do that ourselves now and update the file contents, + // so that positions and line numbers are correct going forward. + psrc[len(prefix)-1] = '\n' + fset.File(file.Package).SetLinesForContent(psrc) + + // If a main function exists, we will assume this is a main + // package and leave the file. + if containsMainFunc(file) { + return file, nil, nil + } + + adjust := func(orig, src []byte) []byte { + // Remove the package clause. + src = src[len(prefix):] + return matchSpace(orig, src) + } + return file, adjust, nil + } + // If the error is that the source file didn't begin with a + // declaration, fall through to try as a statement list. + // Stop and return on any other error. + if !strings.Contains(err.Error(), "expected declaration") { + return nil, nil, err + } + + // If this is a statement list, make it a source file + // by inserting a package clause and turning the list + // into a function body. This handles expressions too. + // Insert using a ;, not a newline, so that the line numbers + // in fsrc match the ones in src. + fsrc := append(append([]byte("package p; func _() {"), src...), '}') + file, err = parser.ParseFile(fset, filename, fsrc, parserMode) + if err == nil { + adjust := func(orig, src []byte) []byte { + // Remove the wrapping. + // Gofmt has turned the ; into a \n\n. + src = src[len("package p\n\nfunc _() {"):] + src = src[:len(src)-len("}\n")] + // Gofmt has also indented the function body one level. + // Remove that indent. + src = bytes.ReplaceAll(src, []byte("\n\t"), []byte("\n")) + return matchSpace(orig, src) + } + return file, adjust, nil + } + + // Failed, and out of options. + return nil, nil, err +} + +// containsMainFunc checks if a file contains a function declaration with the +// function signature 'func main()' +func containsMainFunc(file *ast.File) bool { + for _, decl := range file.Decls { + if f, ok := decl.(*ast.FuncDecl); ok { + if f.Name.Name != "main" { + continue + } + + if len(f.Type.Params.List) != 0 { + continue + } + + if f.Type.Results != nil && len(f.Type.Results.List) != 0 { + continue + } + + return true + } + } + + return false +} + +func cutSpace(b []byte) (before, middle, after []byte) { + i := 0 + for i < len(b) && (b[i] == ' ' || b[i] == '\t' || b[i] == '\n') { + i++ + } + j := len(b) + for j > 0 && (b[j-1] == ' ' || b[j-1] == '\t' || b[j-1] == '\n') { + j-- + } + if i <= j { + return b[:i], b[i:j], b[j:] + } + return nil, nil, b[j:] +} + +// matchSpace reformats src to use the same space context as orig. +// 1. If orig begins with blank lines, matchSpace inserts them at the beginning of src. +// 2. matchSpace copies the indentation of the first non-blank line in orig +// to every non-blank line in src. +// 3. matchSpace copies the trailing space from orig and uses it in place +// of src's trailing space. +func matchSpace(orig []byte, src []byte) []byte { + before, _, after := cutSpace(orig) + i := bytes.LastIndex(before, []byte{'\n'}) + before, indent := before[:i+1], before[i+1:] + + _, src, _ = cutSpace(src) + + var b bytes.Buffer + b.Write(before) + for len(src) > 0 { + line := src + if i := bytes.IndexByte(line, '\n'); i >= 0 { + line, src = line[:i+1], line[i+1:] + } else { + src = nil + } + if len(line) > 0 && line[0] != '\n' { // not blank + b.Write(indent) + } + b.Write(line) + } + b.Write(after) + return b.Bytes() +} + +var impLine = regexp.MustCompile(`^\s+(?:[\w\.]+\s+)?"(.+?)"`) + +func addImportSpaces(r io.Reader, breaks []string) ([]byte, error) { + var out bytes.Buffer + in := bufio.NewReader(r) + inImports := false + done := false + for { + s, err := in.ReadString('\n') + if err == io.EOF { + break + } else if err != nil { + return nil, err + } + + if !inImports && !done && strings.HasPrefix(s, "import") { + inImports = true + } + if inImports && (strings.HasPrefix(s, "var") || + strings.HasPrefix(s, "func") || + strings.HasPrefix(s, "const") || + strings.HasPrefix(s, "type")) { + done = true + inImports = false + } + if inImports && len(breaks) > 0 { + if m := impLine.FindStringSubmatch(s); m != nil { + if m[1] == breaks[0] { + out.WriteByte('\n') + breaks = breaks[1:] + } + } + } + + fmt.Fprint(&out, s) + } + return out.Bytes(), nil +} diff --git a/backend/vendor/golang.org/x/tools/internal/imports/mod.go b/backend/vendor/golang.org/x/tools/internal/imports/mod.go new file mode 100644 index 0000000..df94ec8 --- /dev/null +++ b/backend/vendor/golang.org/x/tools/internal/imports/mod.go @@ -0,0 +1,841 @@ +// Copyright 2019 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package imports + +import ( + "bytes" + "context" + "encoding/json" + "fmt" + "os" + "path" + "path/filepath" + "regexp" + "slices" + "sort" + "strconv" + "strings" + + "golang.org/x/mod/module" + "golang.org/x/tools/internal/event" + "golang.org/x/tools/internal/gocommand" + "golang.org/x/tools/internal/gopathwalk" + "golang.org/x/tools/internal/stdlib" +) + +// Notes(rfindley): ModuleResolver appears to be heavily optimized for scanning +// as fast as possible, which is desirable for a call to goimports from the +// command line, but it doesn't work as well for gopls, where it suffers from +// slow startup (golang/go#44863) and intermittent hanging (golang/go#59216), +// both caused by populating the cache, albeit in slightly different ways. +// +// A high level list of TODOs: +// - Optimize the scan itself, as there is some redundancy statting and +// reading go.mod files. +// - Invert the relationship between ProcessEnv and Resolver (see the +// docstring of ProcessEnv). +// - Make it easier to use an external resolver implementation. +// +// Smaller TODOs are annotated in the code below. + +// ModuleResolver implements the Resolver interface for a workspace using +// modules. +// +// A goal of the ModuleResolver is to invoke the Go command as little as +// possible. To this end, it runs the Go command only for listing module +// information (i.e. `go list -m -e -json ...`). Package scanning, the process +// of loading package information for the modules, is implemented internally +// via the scan method. +// +// It has two types of state: the state derived from the go command, which +// is populated by init, and the state derived from scans, which is populated +// via scan. A root is considered scanned if it has been walked to discover +// directories. However, if the scan did not require additional information +// from the directory (such as package name or exports), the directory +// information itself may be partially populated. It will be lazily filled in +// as needed by scans, using the scanCallback. +type ModuleResolver struct { + env *ProcessEnv + + // Module state, populated during construction + dummyVendorMod *gocommand.ModuleJSON // if vendoring is enabled, a pseudo-module to represent the /vendor directory + moduleCacheDir string // GOMODCACHE, inferred from GOPATH if unset + roots []gopathwalk.Root // roots to scan, in approximate order of importance + mains []*gocommand.ModuleJSON // main modules + mainByDir map[string]*gocommand.ModuleJSON // module information by dir, to join with roots + modsByModPath []*gocommand.ModuleJSON // all modules, ordered by # of path components in their module path + modsByDir []*gocommand.ModuleJSON // ...or by the number of path components in their Dir. + + // Scanning state, populated by scan + + // scanSema prevents concurrent scans, and guards scannedRoots and the cache + // fields below (though the caches themselves are concurrency safe). + // Receive to acquire, send to release. + scanSema chan struct{} + scannedRoots map[gopathwalk.Root]bool // if true, root has been walked + + // Caches of directory info, populated by scans and scan callbacks + // + // moduleCacheCache stores cached information about roots in the module + // cache, which are immutable and therefore do not need to be invalidated. + // + // otherCache stores information about all other roots (even GOROOT), which + // may change. + moduleCacheCache *DirInfoCache + otherCache *DirInfoCache +} + +// newModuleResolver returns a new module-aware goimports resolver. +// +// Note: use caution when modifying this constructor: changes must also be +// reflected in ModuleResolver.ClearForNewScan. +func newModuleResolver(e *ProcessEnv, moduleCacheCache *DirInfoCache) (*ModuleResolver, error) { + r := &ModuleResolver{ + env: e, + scanSema: make(chan struct{}, 1), + } + r.scanSema <- struct{}{} // release + + goenv, err := r.env.goEnv() + if err != nil { + return nil, err + } + + // TODO(rfindley): can we refactor to share logic with r.env.invokeGo? + inv := gocommand.Invocation{ + BuildFlags: r.env.BuildFlags, + ModFlag: r.env.ModFlag, + Env: r.env.env(), + Logf: r.env.Logf, + WorkingDir: r.env.WorkingDir, + } + + vendorEnabled := false + var mainModVendor *gocommand.ModuleJSON // for module vendoring + var mainModsVendor []*gocommand.ModuleJSON // for workspace vendoring + + goWork := r.env.Env["GOWORK"] + if len(goWork) == 0 { + // TODO(rfindley): VendorEnabled runs the go command to get GOFLAGS, but + // they should be available from the ProcessEnv. Can we avoid the redundant + // invocation? + vendorEnabled, mainModVendor, err = gocommand.VendorEnabled(context.TODO(), inv, r.env.GocmdRunner) + if err != nil { + return nil, err + } + } else { + vendorEnabled, mainModsVendor, err = gocommand.WorkspaceVendorEnabled(context.Background(), inv, r.env.GocmdRunner) + if err != nil { + return nil, err + } + } + + if vendorEnabled { + if mainModVendor != nil { + // Module vendor mode is on, so all the non-Main modules are irrelevant, + // and we need to search /vendor for everything. + r.mains = []*gocommand.ModuleJSON{mainModVendor} + r.dummyVendorMod = &gocommand.ModuleJSON{ + Path: "", + Dir: filepath.Join(mainModVendor.Dir, "vendor"), + } + r.modsByModPath = []*gocommand.ModuleJSON{mainModVendor, r.dummyVendorMod} + r.modsByDir = []*gocommand.ModuleJSON{mainModVendor, r.dummyVendorMod} + } else { + // Workspace vendor mode is on, so all the non-Main modules are irrelevant, + // and we need to search /vendor for everything. + r.mains = mainModsVendor + r.dummyVendorMod = &gocommand.ModuleJSON{ + Path: "", + Dir: filepath.Join(filepath.Dir(goWork), "vendor"), + } + r.modsByModPath = append(slices.Clone(mainModsVendor), r.dummyVendorMod) + r.modsByDir = append(slices.Clone(mainModsVendor), r.dummyVendorMod) + } + } else { + // Vendor mode is off, so run go list -m ... to find everything. + err := r.initAllMods() + // We expect an error when running outside of a module with + // GO111MODULE=on. Other errors are fatal. + if err != nil { + if errMsg := err.Error(); !strings.Contains(errMsg, "working directory is not part of a module") && !strings.Contains(errMsg, "go.mod file not found") { + return nil, err + } + } + } + + r.moduleCacheDir = gomodcacheForEnv(goenv) + if r.moduleCacheDir == "" { + return nil, fmt.Errorf("cannot resolve GOMODCACHE") + } + + sort.Slice(r.modsByModPath, func(i, j int) bool { + count := func(x int) int { + return strings.Count(r.modsByModPath[x].Path, "/") + } + return count(j) < count(i) // descending order + }) + sort.Slice(r.modsByDir, func(i, j int) bool { + count := func(x int) int { + return strings.Count(r.modsByDir[x].Dir, string(filepath.Separator)) + } + return count(j) < count(i) // descending order + }) + + r.roots = []gopathwalk.Root{} + if goenv["GOROOT"] != "" { // "" happens in tests + r.roots = append(r.roots, gopathwalk.Root{Path: filepath.Join(goenv["GOROOT"], "/src"), Type: gopathwalk.RootGOROOT}) + } + r.mainByDir = make(map[string]*gocommand.ModuleJSON) + for _, main := range r.mains { + r.roots = append(r.roots, gopathwalk.Root{Path: main.Dir, Type: gopathwalk.RootCurrentModule}) + r.mainByDir[main.Dir] = main + } + if vendorEnabled { + r.roots = append(r.roots, gopathwalk.Root{Path: r.dummyVendorMod.Dir, Type: gopathwalk.RootOther}) + } else { + addDep := func(mod *gocommand.ModuleJSON) { + if mod.Replace == nil { + // This is redundant with the cache, but we'll skip it cheaply enough + // when we encounter it in the module cache scan. + // + // Including it at a lower index in r.roots than the module cache dir + // helps prioritize matches from within existing dependencies. + r.roots = append(r.roots, gopathwalk.Root{Path: mod.Dir, Type: gopathwalk.RootModuleCache}) + } else { + r.roots = append(r.roots, gopathwalk.Root{Path: mod.Dir, Type: gopathwalk.RootOther}) + } + } + // Walk dependent modules before scanning the full mod cache, direct deps first. + for _, mod := range r.modsByModPath { + if !mod.Indirect && !mod.Main { + addDep(mod) + } + } + for _, mod := range r.modsByModPath { + if mod.Indirect && !mod.Main { + addDep(mod) + } + } + // If provided, share the moduleCacheCache. + // + // TODO(rfindley): The module cache is immutable. However, the loaded + // exports do depend on GOOS and GOARCH. Fortunately, the + // ProcessEnv.buildContext does not adjust these from build.DefaultContext + // (even though it should). So for now, this is OK to share, but we need to + // add logic for handling GOOS/GOARCH. + r.moduleCacheCache = moduleCacheCache + r.roots = append(r.roots, gopathwalk.Root{Path: r.moduleCacheDir, Type: gopathwalk.RootModuleCache}) + } + + r.scannedRoots = map[gopathwalk.Root]bool{} + if r.moduleCacheCache == nil { + r.moduleCacheCache = NewDirInfoCache() + } + r.otherCache = NewDirInfoCache() + return r, nil +} + +// gomodcacheForEnv returns the GOMODCACHE value to use based on the given env +// map, which must have GOMODCACHE and GOPATH populated. +// +// TODO(rfindley): this is defensive refactoring. +// 1. Is this even relevant anymore? Can't we just read GOMODCACHE. +// 2. Use this to separate module cache scanning from other scanning. +func gomodcacheForEnv(goenv map[string]string) string { + if gmc := goenv["GOMODCACHE"]; gmc != "" { + // golang/go#67156: ensure that the module cache is clean, since it is + // assumed as a prefix to directories scanned by gopathwalk, which are + // themselves clean. + return filepath.Clean(gmc) + } + gopaths := filepath.SplitList(goenv["GOPATH"]) + if len(gopaths) == 0 { + return "" + } + return filepath.Join(gopaths[0], "/pkg/mod") +} + +func (r *ModuleResolver) initAllMods() error { + stdout, err := r.env.invokeGo(context.TODO(), "list", "-m", "-e", "-json", "...") + if err != nil { + return err + } + for dec := json.NewDecoder(stdout); dec.More(); { + mod := &gocommand.ModuleJSON{} + if err := dec.Decode(mod); err != nil { + return err + } + if mod.Dir == "" { + r.env.logf("module %v has not been downloaded and will be ignored", mod.Path) + // Can't do anything with a module that's not downloaded. + continue + } + // golang/go#36193: the go command doesn't always clean paths. + mod.Dir = filepath.Clean(mod.Dir) + r.modsByModPath = append(r.modsByModPath, mod) + r.modsByDir = append(r.modsByDir, mod) + if mod.Main { + r.mains = append(r.mains, mod) + } + } + return nil +} + +// ClearForNewScan invalidates the last scan. +// +// It preserves the set of roots, but forgets about the set of directories. +// Though it forgets the set of module cache directories, it remembers their +// contents, since they are assumed to be immutable. +func (r *ModuleResolver) ClearForNewScan() Resolver { + <-r.scanSema // acquire r, to guard scannedRoots + r2 := &ModuleResolver{ + env: r.env, + dummyVendorMod: r.dummyVendorMod, + moduleCacheDir: r.moduleCacheDir, + roots: r.roots, + mains: r.mains, + mainByDir: r.mainByDir, + modsByModPath: r.modsByModPath, + + scanSema: make(chan struct{}, 1), + scannedRoots: make(map[gopathwalk.Root]bool), + otherCache: NewDirInfoCache(), + moduleCacheCache: r.moduleCacheCache, + } + r2.scanSema <- struct{}{} // r2 must start released + // Invalidate root scans. We don't need to invalidate module cache roots, + // because they are immutable. + // (We don't support a use case where GOMODCACHE is cleaned in the middle of + // e.g. a gopls session: the user must restart gopls to get accurate + // imports.) + // + // Scanning for new directories in GOMODCACHE should be handled elsewhere, + // via a call to ScanModuleCache. + for _, root := range r.roots { + if root.Type == gopathwalk.RootModuleCache && r.scannedRoots[root] { + r2.scannedRoots[root] = true + } + } + r.scanSema <- struct{}{} // release r + return r2 +} + +// ClearModuleInfo invalidates resolver state that depends on go.mod file +// contents (essentially, the output of go list -m -json ...). +// +// Notably, it does not forget directory contents, which are reset +// asynchronously via ClearForNewScan. +// +// If the ProcessEnv is a GOPATH environment, ClearModuleInfo is a no op. +// +// TODO(rfindley): move this to a new env.go, consolidating ProcessEnv methods. +func (e *ProcessEnv) ClearModuleInfo() { + if r, ok := e.resolver.(*ModuleResolver); ok { + resolver, err := newModuleResolver(e, e.ModCache) + if err != nil { + e.resolver = nil + e.resolverErr = err + return + } + + <-r.scanSema // acquire (guards caches) + resolver.moduleCacheCache = r.moduleCacheCache + resolver.otherCache = r.otherCache + r.scanSema <- struct{}{} // release + + e.UpdateResolver(resolver) + } +} + +// UpdateResolver sets the resolver for the ProcessEnv to use in imports +// operations. Only for use with the result of [Resolver.ClearForNewScan]. +// +// TODO(rfindley): this awkward API is a result of the (arguably) inverted +// relationship between configuration and state described in the doc comment +// for [ProcessEnv]. +func (e *ProcessEnv) UpdateResolver(r Resolver) { + e.resolver = r + e.resolverErr = nil +} + +// findPackage returns the module and directory from within the main modules +// and their dependencies that contains the package at the given import path, +// or returns nil, "" if no module is in scope. +func (r *ModuleResolver) findPackage(importPath string) (*gocommand.ModuleJSON, string) { + // This can't find packages in the stdlib, but that's harmless for all + // the existing code paths. + for _, m := range r.modsByModPath { + if !strings.HasPrefix(importPath, m.Path) { + continue + } + pathInModule := importPath[len(m.Path):] + pkgDir := filepath.Join(m.Dir, pathInModule) + if r.dirIsNestedModule(pkgDir, m) { + continue + } + + if info, ok := r.cacheLoad(pkgDir); ok { + if loaded, err := info.reachedStatus(nameLoaded); loaded { + if err != nil { + continue // No package in this dir. + } + return m, pkgDir + } + if scanned, err := info.reachedStatus(directoryScanned); scanned && err != nil { + continue // Dir is unreadable, etc. + } + // This is slightly wrong: a directory doesn't have to have an + // importable package to count as a package for package-to-module + // resolution. package main or _test files should count but + // don't. + // TODO(heschi): fix this. + if _, err := r.cachePackageName(info); err == nil { + return m, pkgDir + } + } + + // Not cached. Read the filesystem. + pkgFiles, err := os.ReadDir(pkgDir) + if err != nil { + continue + } + // A module only contains a package if it has buildable go + // files in that directory. If not, it could be provided by an + // outer module. See #29736. + for _, fi := range pkgFiles { + if ok, _ := r.env.matchFile(pkgDir, fi.Name()); ok { + return m, pkgDir + } + } + } + return nil, "" +} + +func (r *ModuleResolver) cacheLoad(dir string) (directoryPackageInfo, bool) { + if info, ok := r.moduleCacheCache.Load(dir); ok { + return info, ok + } + return r.otherCache.Load(dir) +} + +func (r *ModuleResolver) cacheStore(info directoryPackageInfo) { + if info.rootType == gopathwalk.RootModuleCache { + r.moduleCacheCache.Store(info.dir, info) + } else { + r.otherCache.Store(info.dir, info) + } +} + +// cachePackageName caches the package name for a dir already in the cache. +func (r *ModuleResolver) cachePackageName(info directoryPackageInfo) (string, error) { + if info.rootType == gopathwalk.RootModuleCache { + return r.moduleCacheCache.CachePackageName(info) + } + return r.otherCache.CachePackageName(info) +} + +func (r *ModuleResolver) cacheExports(ctx context.Context, env *ProcessEnv, info directoryPackageInfo) (string, []stdlib.Symbol, error) { + if info.rootType == gopathwalk.RootModuleCache { + return r.moduleCacheCache.CacheExports(ctx, env, info) + } + return r.otherCache.CacheExports(ctx, env, info) +} + +// findModuleByDir returns the module that contains dir, or nil if no such +// module is in scope. +func (r *ModuleResolver) findModuleByDir(dir string) *gocommand.ModuleJSON { + // This is quite tricky and may not be correct. dir could be: + // - a package in the main module. + // - a replace target underneath the main module's directory. + // - a nested module in the above. + // - a replace target somewhere totally random. + // - a nested module in the above. + // - in the mod cache. + // - in /vendor/ in -mod=vendor mode. + // - nested module? Dunno. + // Rumor has it that replace targets cannot contain other replace targets. + // + // Note that it is critical here that modsByDir is sorted to have deeper dirs + // first. This ensures that findModuleByDir finds the innermost module. + // See also golang/go#56291. + for _, m := range r.modsByDir { + if !strings.HasPrefix(dir, m.Dir) { + continue + } + + if r.dirIsNestedModule(dir, m) { + continue + } + + return m + } + return nil +} + +// dirIsNestedModule reports if dir is contained in a nested module underneath +// mod, not actually in mod. +func (r *ModuleResolver) dirIsNestedModule(dir string, mod *gocommand.ModuleJSON) bool { + if !strings.HasPrefix(dir, mod.Dir) { + return false + } + if r.dirInModuleCache(dir) { + // Nested modules in the module cache are pruned, + // so it cannot be a nested module. + return false + } + if mod != nil && mod == r.dummyVendorMod { + // The /vendor pseudomodule is flattened and doesn't actually count. + return false + } + modDir, _ := r.modInfo(dir) + if modDir == "" { + return false + } + return modDir != mod.Dir +} + +func readModName(modFile string) string { + modBytes, err := os.ReadFile(modFile) + if err != nil { + return "" + } + return modulePath(modBytes) +} + +func (r *ModuleResolver) modInfo(dir string) (modDir, modName string) { + if r.dirInModuleCache(dir) { + if matches := modCacheRegexp.FindStringSubmatch(dir); len(matches) == 3 { + index := strings.Index(dir, matches[1]+"@"+matches[2]) + modDir := filepath.Join(dir[:index], matches[1]+"@"+matches[2]) + return modDir, readModName(filepath.Join(modDir, "go.mod")) + } + } + for { + if info, ok := r.cacheLoad(dir); ok { + return info.moduleDir, info.moduleName + } + f := filepath.Join(dir, "go.mod") + info, err := os.Stat(f) + if err == nil && !info.IsDir() { + return dir, readModName(f) + } + + d := filepath.Dir(dir) + if len(d) >= len(dir) { + return "", "" // reached top of file system, no go.mod + } + dir = d + } +} + +func (r *ModuleResolver) dirInModuleCache(dir string) bool { + if r.moduleCacheDir == "" { + return false + } + return strings.HasPrefix(dir, r.moduleCacheDir) +} + +func (r *ModuleResolver) loadPackageNames(importPaths []string, srcDir string) (map[string]string, error) { + names := map[string]string{} + for _, path := range importPaths { + // TODO(rfindley): shouldn't this use the dirInfoCache? + _, packageDir := r.findPackage(path) + if packageDir == "" { + continue + } + name, err := packageDirToName(packageDir) + if err != nil { + continue + } + names[path] = name + } + return names, nil +} + +func (r *ModuleResolver) scan(ctx context.Context, callback *scanCallback) error { + ctx, done := event.Start(ctx, "imports.ModuleResolver.scan") + defer done() + + processDir := func(info directoryPackageInfo) { + // Skip this directory if we were not able to get the package information successfully. + if scanned, err := info.reachedStatus(directoryScanned); !scanned || err != nil { + return + } + pkg, err := r.canonicalize(info) + if err != nil { + return + } + if !callback.dirFound(pkg) { + return + } + + pkg.packageName, err = r.cachePackageName(info) + if err != nil { + return + } + if !callback.packageNameLoaded(pkg) { + return + } + + _, exports, err := r.loadExports(ctx, pkg, false) + if err != nil { + return + } + callback.exportsLoaded(pkg, exports) + } + + // Start processing everything in the cache, and listen for the new stuff + // we discover in the walk below. + stop1 := r.moduleCacheCache.ScanAndListen(ctx, processDir) + defer stop1() + stop2 := r.otherCache.ScanAndListen(ctx, processDir) + defer stop2() + + // We assume cached directories are fully cached, including all their + // children, and have not changed. We can skip them. + skip := func(root gopathwalk.Root, dir string) bool { + if r.env.SkipPathInScan != nil && root.Type == gopathwalk.RootCurrentModule { + if root.Path == dir { + return false + } + + if r.env.SkipPathInScan(filepath.Clean(dir)) { + return true + } + } + + info, ok := r.cacheLoad(dir) + if !ok { + return false + } + // This directory can be skipped as long as we have already scanned it. + // Packages with errors will continue to have errors, so there is no need + // to rescan them. + packageScanned, _ := info.reachedStatus(directoryScanned) + return packageScanned + } + + add := func(root gopathwalk.Root, dir string) { + r.cacheStore(r.scanDirForPackage(root, dir)) + } + + // r.roots and the callback are not necessarily safe to use in the + // goroutine below. Process them eagerly. + roots := filterRoots(r.roots, callback.rootFound) + // We can't cancel walks, because we need them to finish to have a usable + // cache. Instead, run them in a separate goroutine and detach. + scanDone := make(chan struct{}) + go func() { + select { + case <-ctx.Done(): + return + case <-r.scanSema: // acquire + } + defer func() { r.scanSema <- struct{}{} }() // release + // We have the lock on r.scannedRoots, and no other scans can run. + for _, root := range roots { + if ctx.Err() != nil { + return + } + + if r.scannedRoots[root] { + continue + } + gopathwalk.WalkSkip([]gopathwalk.Root{root}, add, skip, gopathwalk.Options{Logf: r.env.Logf, ModulesEnabled: true}) + r.scannedRoots[root] = true + } + close(scanDone) + }() + select { + case <-ctx.Done(): + case <-scanDone: + } + return nil +} + +func (r *ModuleResolver) scoreImportPath(ctx context.Context, path string) float64 { + if stdlib.HasPackage(path) { + return MaxRelevance + } + mod, _ := r.findPackage(path) + return modRelevance(mod) +} + +func modRelevance(mod *gocommand.ModuleJSON) float64 { + var relevance float64 + switch { + case mod == nil: // out of scope + return MaxRelevance - 4 + case mod.Indirect: + relevance = MaxRelevance - 3 + case !mod.Main: + relevance = MaxRelevance - 2 + default: + relevance = MaxRelevance - 1 // main module ties with stdlib + } + + _, versionString, ok := module.SplitPathVersion(mod.Path) + if ok { + index := strings.Index(versionString, "v") + if index == -1 { + return relevance + } + if versionNumber, err := strconv.ParseFloat(versionString[index+1:], 64); err == nil { + relevance += versionNumber / 1000 + } + } + + return relevance +} + +// canonicalize gets the result of canonicalizing the packages using the results +// of initializing the resolver from 'go list -m'. +func (r *ModuleResolver) canonicalize(info directoryPackageInfo) (*pkg, error) { + // Packages in GOROOT are already canonical, regardless of the std/cmd modules. + if info.rootType == gopathwalk.RootGOROOT { + return &pkg{ + importPathShort: info.nonCanonicalImportPath, + dir: info.dir, + packageName: path.Base(info.nonCanonicalImportPath), + relevance: MaxRelevance, + }, nil + } + + importPath := info.nonCanonicalImportPath + mod := r.findModuleByDir(info.dir) + // Check if the directory is underneath a module that's in scope. + if mod != nil { + // It is. If dir is the target of a replace directive, + // our guessed import path is wrong. Use the real one. + if mod.Dir == info.dir { + importPath = mod.Path + } else { + dirInMod := info.dir[len(mod.Dir)+len("/"):] + importPath = path.Join(mod.Path, filepath.ToSlash(dirInMod)) + } + } else if !strings.HasPrefix(importPath, info.moduleName) { + // The module's name doesn't match the package's import path. It + // probably needs a replace directive we don't have. + return nil, fmt.Errorf("package in %q is not valid without a replace statement", info.dir) + } + + res := &pkg{ + importPathShort: importPath, + dir: info.dir, + relevance: modRelevance(mod), + } + // We may have discovered a package that has a different version + // in scope already. Canonicalize to that one if possible. + if _, canonicalDir := r.findPackage(importPath); canonicalDir != "" { + res.dir = canonicalDir + } + return res, nil +} + +func (r *ModuleResolver) loadExports(ctx context.Context, pkg *pkg, includeTest bool) (string, []stdlib.Symbol, error) { + if info, ok := r.cacheLoad(pkg.dir); ok && !includeTest { + return r.cacheExports(ctx, r.env, info) + } + return loadExportsFromFiles(ctx, r.env, pkg.dir, includeTest) +} + +func (r *ModuleResolver) scanDirForPackage(root gopathwalk.Root, dir string) directoryPackageInfo { + subdir := "" + if prefix := root.Path + string(filepath.Separator); strings.HasPrefix(dir, prefix) { + subdir = dir[len(prefix):] + } + importPath := filepath.ToSlash(subdir) + if strings.HasPrefix(importPath, "vendor/") { + // Only enter vendor directories if they're explicitly requested as a root. + return directoryPackageInfo{ + status: directoryScanned, + err: fmt.Errorf("unwanted vendor directory"), + } + } + switch root.Type { + case gopathwalk.RootCurrentModule: + importPath = path.Join(r.mainByDir[root.Path].Path, filepath.ToSlash(subdir)) + case gopathwalk.RootModuleCache: + matches := modCacheRegexp.FindStringSubmatch(subdir) + if len(matches) == 0 { + return directoryPackageInfo{ + status: directoryScanned, + err: fmt.Errorf("invalid module cache path: %v", subdir), + } + } + modPath, err := module.UnescapePath(filepath.ToSlash(matches[1])) + if err != nil { + r.env.logf("decoding module cache path %q: %v", subdir, err) + return directoryPackageInfo{ + status: directoryScanned, + err: fmt.Errorf("decoding module cache path %q: %v", subdir, err), + } + } + importPath = path.Join(modPath, filepath.ToSlash(matches[3])) + } + + modDir, modName := r.modInfo(dir) + result := directoryPackageInfo{ + status: directoryScanned, + dir: dir, + rootType: root.Type, + nonCanonicalImportPath: importPath, + moduleDir: modDir, + moduleName: modName, + } + if root.Type == gopathwalk.RootGOROOT { + // stdlib packages are always in scope, despite the confusing go.mod + return result + } + return result +} + +// modCacheRegexp splits a path in a module cache into module, module version, and package. +var modCacheRegexp = regexp.MustCompile(`(.*)@([^/\\]*)(.*)`) + +var ( + slashSlash = []byte("//") + moduleStr = []byte("module") +) + +// modulePath returns the module path from the gomod file text. +// If it cannot find a module path, it returns an empty string. +// It is tolerant of unrelated problems in the go.mod file. +// +// Copied from cmd/go/internal/modfile. +func modulePath(mod []byte) string { + for len(mod) > 0 { + line := mod + mod = nil + if i := bytes.IndexByte(line, '\n'); i >= 0 { + line, mod = line[:i], line[i+1:] + } + if i := bytes.Index(line, slashSlash); i >= 0 { + line = line[:i] + } + line = bytes.TrimSpace(line) + if !bytes.HasPrefix(line, moduleStr) { + continue + } + line = line[len(moduleStr):] + n := len(line) + line = bytes.TrimSpace(line) + if len(line) == n || len(line) == 0 { + continue + } + + if line[0] == '"' || line[0] == '`' { + p, err := strconv.Unquote(string(line)) + if err != nil { + return "" // malformed quoted string or multiline module path + } + return p + } + + return string(line) + } + return "" // missing module path +} diff --git a/backend/vendor/golang.org/x/tools/internal/imports/mod_cache.go b/backend/vendor/golang.org/x/tools/internal/imports/mod_cache.go new file mode 100644 index 0000000..b96c9d4 --- /dev/null +++ b/backend/vendor/golang.org/x/tools/internal/imports/mod_cache.go @@ -0,0 +1,331 @@ +// Copyright 2019 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package imports + +import ( + "context" + "fmt" + "path" + "path/filepath" + "strings" + "sync" + + "golang.org/x/mod/module" + "golang.org/x/tools/internal/gopathwalk" + "golang.org/x/tools/internal/stdlib" +) + +// To find packages to import, the resolver needs to know about all of +// the packages that could be imported. This includes packages that are +// already in modules that are in (1) the current module, (2) replace targets, +// and (3) packages in the module cache. Packages in (1) and (2) may change over +// time, as the client may edit the current module and locally replaced modules. +// The module cache (which includes all of the packages in (3)) can only +// ever be added to. +// +// The resolver can thus save state about packages in the module cache +// and guarantee that this will not change over time. To obtain information +// about new modules added to the module cache, the module cache should be +// rescanned. +// +// It is OK to serve information about modules that have been deleted, +// as they do still exist. +// TODO(suzmue): can we share information with the caller about +// what module needs to be downloaded to import this package? + +type directoryPackageStatus int + +const ( + _ directoryPackageStatus = iota + directoryScanned + nameLoaded + exportsLoaded +) + +// directoryPackageInfo holds (possibly incomplete) information about packages +// contained in a given directory. +type directoryPackageInfo struct { + // status indicates the extent to which this struct has been filled in. + status directoryPackageStatus + // err is non-nil when there was an error trying to reach status. + err error + + // Set when status >= directoryScanned. + + // dir is the absolute directory of this package. + dir string + rootType gopathwalk.RootType + // nonCanonicalImportPath is the package's expected import path. It may + // not actually be importable at that path. + nonCanonicalImportPath string + + // Module-related information. + moduleDir string // The directory that is the module root of this dir. + moduleName string // The module name that contains this dir. + + // Set when status >= nameLoaded. + + packageName string // the package name, as declared in the source. + + // Set when status >= exportsLoaded. + // TODO(rfindley): it's hard to see this, but exports depend implicitly on + // the default build context GOOS and GOARCH. + // + // We can make this explicit, and key exports by GOOS, GOARCH. + exports []stdlib.Symbol +} + +// reachedStatus returns true when info has a status at least target and any error associated with +// an attempt to reach target. +func (info *directoryPackageInfo) reachedStatus(target directoryPackageStatus) (bool, error) { + if info.err == nil { + return info.status >= target, nil + } + if info.status == target { + return true, info.err + } + return true, nil +} + +// DirInfoCache is a concurrency-safe map for storing information about +// directories that may contain packages. +// +// The information in this cache is built incrementally. Entries are initialized in scan. +// No new keys should be added in any other functions, as all directories containing +// packages are identified in scan. +// +// Other functions, including loadExports and findPackage, may update entries in this cache +// as they discover new things about the directory. +// +// The information in the cache is not expected to change for the cache's +// lifetime, so there is no protection against competing writes. Users should +// take care not to hold the cache across changes to the underlying files. +type DirInfoCache struct { + mu sync.Mutex + // dirs stores information about packages in directories, keyed by absolute path. + dirs map[string]*directoryPackageInfo + listeners map[*int]cacheListener +} + +func NewDirInfoCache() *DirInfoCache { + return &DirInfoCache{ + dirs: make(map[string]*directoryPackageInfo), + listeners: make(map[*int]cacheListener), + } +} + +type cacheListener func(directoryPackageInfo) + +// ScanAndListen calls listener on all the items in the cache, and on anything +// newly added. The returned stop function waits for all in-flight callbacks to +// finish and blocks new ones. +func (d *DirInfoCache) ScanAndListen(ctx context.Context, listener cacheListener) func() { + ctx, cancel := context.WithCancel(ctx) + + // Flushing out all the callbacks is tricky without knowing how many there + // are going to be. Setting an arbitrary limit makes it much easier. + const maxInFlight = 10 + sema := make(chan struct{}, maxInFlight) + for range maxInFlight { + sema <- struct{}{} + } + + cookie := new(int) // A unique ID we can use for the listener. + + // We can't hold mu while calling the listener. + d.mu.Lock() + var keys []string + for key := range d.dirs { + keys = append(keys, key) + } + d.listeners[cookie] = func(info directoryPackageInfo) { + select { + case <-ctx.Done(): + return + case <-sema: + } + listener(info) + sema <- struct{}{} + } + d.mu.Unlock() + + stop := func() { + cancel() + d.mu.Lock() + delete(d.listeners, cookie) + d.mu.Unlock() + for range maxInFlight { + <-sema + } + } + + // Process the pre-existing keys. + for _, k := range keys { + select { + case <-ctx.Done(): + return stop + default: + } + if v, ok := d.Load(k); ok { + listener(v) + } + } + + return stop +} + +// Store stores the package info for dir. +func (d *DirInfoCache) Store(dir string, info directoryPackageInfo) { + d.mu.Lock() + // TODO(rfindley, golang/go#59216): should we overwrite an existing entry? + // That seems incorrect as the cache should be idempotent. + _, old := d.dirs[dir] + d.dirs[dir] = &info + var listeners []cacheListener + for _, l := range d.listeners { + listeners = append(listeners, l) + } + d.mu.Unlock() + + if !old { + for _, l := range listeners { + l(info) + } + } +} + +// Load returns a copy of the directoryPackageInfo for absolute directory dir. +func (d *DirInfoCache) Load(dir string) (directoryPackageInfo, bool) { + d.mu.Lock() + defer d.mu.Unlock() + info, ok := d.dirs[dir] + if !ok { + return directoryPackageInfo{}, false + } + return *info, true +} + +// Keys returns the keys currently present in d. +func (d *DirInfoCache) Keys() (keys []string) { + d.mu.Lock() + defer d.mu.Unlock() + for key := range d.dirs { + keys = append(keys, key) + } + return keys +} + +func (d *DirInfoCache) CachePackageName(info directoryPackageInfo) (string, error) { + if loaded, err := info.reachedStatus(nameLoaded); loaded { + return info.packageName, err + } + if scanned, err := info.reachedStatus(directoryScanned); !scanned || err != nil { + return "", fmt.Errorf("cannot read package name, scan error: %v", err) + } + info.packageName, info.err = packageDirToName(info.dir) + info.status = nameLoaded + d.Store(info.dir, info) + return info.packageName, info.err +} + +func (d *DirInfoCache) CacheExports(ctx context.Context, env *ProcessEnv, info directoryPackageInfo) (string, []stdlib.Symbol, error) { + if reached, _ := info.reachedStatus(exportsLoaded); reached { + return info.packageName, info.exports, info.err + } + if reached, err := info.reachedStatus(nameLoaded); reached && err != nil { + return "", nil, err + } + info.packageName, info.exports, info.err = loadExportsFromFiles(ctx, env, info.dir, false) + if info.err == context.Canceled || info.err == context.DeadlineExceeded { + return info.packageName, info.exports, info.err + } + // The cache structure wants things to proceed linearly. We can skip a + // step here, but only if we succeed. + if info.status == nameLoaded || info.err == nil { + info.status = exportsLoaded + } else { + info.status = nameLoaded + } + d.Store(info.dir, info) + return info.packageName, info.exports, info.err +} + +// ScanModuleCache walks the given directory, which must be a GOMODCACHE value, +// for directory package information, storing the results in cache. +func ScanModuleCache(dir string, cache *DirInfoCache, logf func(string, ...any)) { + // Note(rfindley): it's hard to see, but this function attempts to implement + // just the side effects on cache of calling PrimeCache with a ProcessEnv + // that has the given dir as its GOMODCACHE. + // + // Teasing out the control flow, we see that we can avoid any handling of + // vendor/ and can infer module info entirely from the path, simplifying the + // logic here. + + root := gopathwalk.Root{ + Path: filepath.Clean(dir), + Type: gopathwalk.RootModuleCache, + } + + directoryInfo := func(root gopathwalk.Root, dir string) directoryPackageInfo { + // This is a copy of ModuleResolver.scanDirForPackage, trimmed down to + // logic that applies to a module cache directory. + + subdir := "" + if dir != root.Path { + subdir = dir[len(root.Path)+len("/"):] + } + + matches := modCacheRegexp.FindStringSubmatch(subdir) + if len(matches) == 0 { + return directoryPackageInfo{ + status: directoryScanned, + err: fmt.Errorf("invalid module cache path: %v", subdir), + } + } + modPath, err := module.UnescapePath(filepath.ToSlash(matches[1])) + if err != nil { + if logf != nil { + logf("decoding module cache path %q: %v", subdir, err) + } + return directoryPackageInfo{ + status: directoryScanned, + err: fmt.Errorf("decoding module cache path %q: %v", subdir, err), + } + } + importPath := path.Join(modPath, filepath.ToSlash(matches[3])) + index := strings.Index(dir, matches[1]+"@"+matches[2]) + modDir := filepath.Join(dir[:index], matches[1]+"@"+matches[2]) + modName := readModName(filepath.Join(modDir, "go.mod")) + return directoryPackageInfo{ + status: directoryScanned, + dir: dir, + rootType: root.Type, + nonCanonicalImportPath: importPath, + moduleDir: modDir, + moduleName: modName, + } + } + + add := func(root gopathwalk.Root, dir string) { + info := directoryInfo(root, dir) + cache.Store(info.dir, info) + } + + skip := func(_ gopathwalk.Root, dir string) bool { + // Skip directories that have already been scanned. + // + // Note that gopathwalk only adds "package" directories, which must contain + // a .go file, and all such package directories in the module cache are + // immutable. So if we can load a dir, it can be skipped. + info, ok := cache.Load(dir) + if !ok { + return false + } + packageScanned, _ := info.reachedStatus(directoryScanned) + return packageScanned + } + + gopathwalk.WalkSkip([]gopathwalk.Root{root}, add, skip, gopathwalk.Options{Logf: logf, ModulesEnabled: true}) +} diff --git a/backend/vendor/golang.org/x/tools/internal/imports/sortimports.go b/backend/vendor/golang.org/x/tools/internal/imports/sortimports.go new file mode 100644 index 0000000..67c17bc --- /dev/null +++ b/backend/vendor/golang.org/x/tools/internal/imports/sortimports.go @@ -0,0 +1,298 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Hacked up copy of go/ast/import.go +// Modified to use a single token.File in preference to a FileSet. + +package imports + +import ( + "go/ast" + "go/token" + "log" + "slices" + "sort" + "strconv" +) + +// sortImports sorts runs of consecutive import lines in import blocks in f. +// It also removes duplicate imports when it is possible to do so without data loss. +// +// It may mutate the token.File and the ast.File. +func sortImports(localPrefix string, tokFile *token.File, f *ast.File) { + for i, d := range f.Decls { + d, ok := d.(*ast.GenDecl) + if !ok || d.Tok != token.IMPORT { + // Not an import declaration, so we're done. + // Imports are always first. + break + } + + if len(d.Specs) == 0 { + // Empty import block, remove it. + f.Decls = slices.Delete(f.Decls, i, i+1) + } + + if !d.Lparen.IsValid() { + // Not a block: sorted by default. + continue + } + + // Identify and sort runs of specs on successive lines. + i := 0 + specs := d.Specs[:0] + for j, s := range d.Specs { + if j > i && tokFile.Line(s.Pos()) > 1+tokFile.Line(d.Specs[j-1].End()) { + // j begins a new run. End this one. + specs = append(specs, sortSpecs(localPrefix, tokFile, f, d.Specs[i:j])...) + i = j + } + } + specs = append(specs, sortSpecs(localPrefix, tokFile, f, d.Specs[i:])...) + d.Specs = specs + + // Deduping can leave a blank line before the rparen; clean that up. + // Ignore line directives. + if len(d.Specs) > 0 { + lastSpec := d.Specs[len(d.Specs)-1] + lastLine := tokFile.PositionFor(lastSpec.Pos(), false).Line + if rParenLine := tokFile.PositionFor(d.Rparen, false).Line; rParenLine > lastLine+1 { + tokFile.MergeLine(rParenLine - 1) // has side effects! + } + } + } +} + +// mergeImports merges all the import declarations into the first one. +// Taken from golang.org/x/tools/ast/astutil. +// This does not adjust line numbers properly +func mergeImports(f *ast.File) { + if len(f.Decls) <= 1 { + return + } + + // Merge all the import declarations into the first one. + var first *ast.GenDecl + for i := 0; i < len(f.Decls); i++ { + decl := f.Decls[i] + gen, ok := decl.(*ast.GenDecl) + if !ok || gen.Tok != token.IMPORT || declImports(gen, "C") { + continue + } + if first == nil { + first = gen + continue // Don't touch the first one. + } + // We now know there is more than one package in this import + // declaration. Ensure that it ends up parenthesized. + first.Lparen = first.Pos() + // Move the imports of the other import declaration to the first one. + for _, spec := range gen.Specs { + spec.(*ast.ImportSpec).Path.ValuePos = first.Pos() + first.Specs = append(first.Specs, spec) + } + f.Decls = slices.Delete(f.Decls, i, i+1) + i-- + } +} + +// declImports reports whether gen contains an import of path. +// Taken from golang.org/x/tools/ast/astutil. +func declImports(gen *ast.GenDecl, path string) bool { + if gen.Tok != token.IMPORT { + return false + } + for _, spec := range gen.Specs { + impspec := spec.(*ast.ImportSpec) + if importPath(impspec) == path { + return true + } + } + return false +} + +func importPath(s ast.Spec) string { + t, err := strconv.Unquote(s.(*ast.ImportSpec).Path.Value) + if err == nil { + return t + } + return "" +} + +func importName(s ast.Spec) string { + n := s.(*ast.ImportSpec).Name + if n == nil { + return "" + } + return n.Name +} + +func importComment(s ast.Spec) string { + c := s.(*ast.ImportSpec).Comment + if c == nil { + return "" + } + return c.Text() +} + +// collapse indicates whether prev may be removed, leaving only next. +func collapse(prev, next ast.Spec) bool { + if importPath(next) != importPath(prev) || importName(next) != importName(prev) { + return false + } + return prev.(*ast.ImportSpec).Comment == nil +} + +type posSpan struct { + Start token.Pos + End token.Pos +} + +// sortSpecs sorts the import specs within each import decl. +// It may mutate the token.File. +func sortSpecs(localPrefix string, tokFile *token.File, f *ast.File, specs []ast.Spec) []ast.Spec { + // Can't short-circuit here even if specs are already sorted, + // since they might yet need deduplication. + // A lone import, however, may be safely ignored. + if len(specs) <= 1 { + return specs + } + + // Record positions for specs. + pos := make([]posSpan, len(specs)) + for i, s := range specs { + pos[i] = posSpan{s.Pos(), s.End()} + } + + // Identify comments in this range. + // Any comment from pos[0].Start to the final line counts. + lastLine := tokFile.Line(pos[len(pos)-1].End) + cstart := len(f.Comments) + cend := len(f.Comments) + for i, g := range f.Comments { + if g.Pos() < pos[0].Start { + continue + } + if i < cstart { + cstart = i + } + if tokFile.Line(g.End()) > lastLine { + cend = i + break + } + } + comments := f.Comments[cstart:cend] + + // Assign each comment to the import spec preceding it. + importComment := map[*ast.ImportSpec][]*ast.CommentGroup{} + specIndex := 0 + for _, g := range comments { + for specIndex+1 < len(specs) && pos[specIndex+1].Start <= g.Pos() { + specIndex++ + } + s := specs[specIndex].(*ast.ImportSpec) + importComment[s] = append(importComment[s], g) + } + + // Sort the import specs by import path. + // Remove duplicates, when possible without data loss. + // Reassign the import paths to have the same position sequence. + // Reassign each comment to abut the end of its spec. + // Sort the comments by new position. + sort.Sort(byImportSpec{localPrefix, specs}) + + // Dedup. Thanks to our sorting, we can just consider + // adjacent pairs of imports. + deduped := specs[:0] + for i, s := range specs { + if i == len(specs)-1 || !collapse(s, specs[i+1]) { + deduped = append(deduped, s) + } else { + p := s.Pos() + tokFile.MergeLine(tokFile.Line(p)) // has side effects! + } + } + specs = deduped + + // Fix up comment positions + for i, s := range specs { + s := s.(*ast.ImportSpec) + if s.Name != nil { + s.Name.NamePos = pos[i].Start + } + s.Path.ValuePos = pos[i].Start + s.EndPos = pos[i].End + nextSpecPos := pos[i].End + + for _, g := range importComment[s] { + for _, c := range g.List { + c.Slash = pos[i].End + nextSpecPos = c.End() + } + } + if i < len(specs)-1 { + pos[i+1].Start = nextSpecPos + pos[i+1].End = nextSpecPos + } + } + + sort.Sort(byCommentPos(comments)) + + // Fixup comments can insert blank lines, because import specs are on different lines. + // We remove those blank lines here by merging import spec to the first import spec line. + firstSpecLine := tokFile.Line(specs[0].Pos()) + for _, s := range specs[1:] { + p := s.Pos() + line := tokFile.Line(p) + for previousLine := line - 1; previousLine >= firstSpecLine; { + // MergeLine can panic. Avoid the panic at the cost of not removing the blank line + // golang/go#50329 + if previousLine > 0 && previousLine < tokFile.LineCount() { + tokFile.MergeLine(previousLine) // has side effects! + previousLine-- + } else { + // try to gather some data to diagnose how this could happen + req := "Please report what the imports section of your go file looked like." + log.Printf("panic avoided: first:%d line:%d previous:%d max:%d. %s", + firstSpecLine, line, previousLine, tokFile.LineCount(), req) + } + } + } + return specs +} + +type byImportSpec struct { + localPrefix string + specs []ast.Spec // slice of *ast.ImportSpec +} + +func (x byImportSpec) Len() int { return len(x.specs) } +func (x byImportSpec) Swap(i, j int) { x.specs[i], x.specs[j] = x.specs[j], x.specs[i] } +func (x byImportSpec) Less(i, j int) bool { + ipath := importPath(x.specs[i]) + jpath := importPath(x.specs[j]) + + igroup := importGroup(x.localPrefix, ipath) + jgroup := importGroup(x.localPrefix, jpath) + if igroup != jgroup { + return igroup < jgroup + } + + if ipath != jpath { + return ipath < jpath + } + iname := importName(x.specs[i]) + jname := importName(x.specs[j]) + + if iname != jname { + return iname < jname + } + return importComment(x.specs[i]) < importComment(x.specs[j]) +} + +type byCommentPos []*ast.CommentGroup + +func (x byCommentPos) Len() int { return len(x) } +func (x byCommentPos) Swap(i, j int) { x[i], x[j] = x[j], x[i] } +func (x byCommentPos) Less(i, j int) bool { return x[i].Pos() < x[j].Pos() } diff --git a/backend/vendor/golang.org/x/tools/internal/imports/source.go b/backend/vendor/golang.org/x/tools/internal/imports/source.go new file mode 100644 index 0000000..cbe4f3c --- /dev/null +++ b/backend/vendor/golang.org/x/tools/internal/imports/source.go @@ -0,0 +1,63 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package imports + +import "context" + +// These types document the APIs below. +// +// TODO(rfindley): consider making these defined types rather than aliases. +type ( + ImportPath = string + PackageName = string + Symbol = string + + // References is set of References found in a Go file. The first map key is the + // left hand side of a selector expression, the second key is the right hand + // side, and the value should always be true. + References = map[PackageName]map[Symbol]bool +) + +// A Result satisfies a missing import. +// +// The Import field describes the missing import spec, and the Package field +// summarizes the package exports. +type Result struct { + Import *ImportInfo + Package *PackageInfo +} + +// An ImportInfo represents a single import statement. +type ImportInfo struct { + ImportPath string // import path, e.g. "crypto/rand". + Name string // import name, e.g. "crand", or "" if none. +} + +// A PackageInfo represents what's known about a package. +type PackageInfo struct { + Name string // package name in the package declaration, if known + Exports map[string]bool // set of names of known package level sortSymbols +} + +// A Source provides imports to satisfy unresolved references in the file being +// fixed. +type Source interface { + // LoadPackageNames queries PackageName information for the requested import + // paths, when operating from the provided srcDir. + // + // TODO(rfindley): try to refactor to remove this operation. + LoadPackageNames(ctx context.Context, srcDir string, paths []ImportPath) (map[ImportPath]PackageName, error) + + // ResolveReferences asks the Source for the best package name to satisfy + // each of the missing references, in the context of fixing the given + // filename. + // + // Returns a map from package name to a [Result] for that package name that + // provides the required symbols. Keys may be omitted in the map if no + // candidates satisfy all missing references for that package name. It is up + // to each data source to select the best result for each entry in the + // missing map. + ResolveReferences(ctx context.Context, filename string, missing References) ([]*Result, error) +} diff --git a/backend/vendor/golang.org/x/tools/internal/imports/source_env.go b/backend/vendor/golang.org/x/tools/internal/imports/source_env.go new file mode 100644 index 0000000..ec996c3 --- /dev/null +++ b/backend/vendor/golang.org/x/tools/internal/imports/source_env.go @@ -0,0 +1,129 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package imports + +import ( + "context" + "path/filepath" + "strings" + "sync" + + "golang.org/x/sync/errgroup" + "golang.org/x/tools/internal/gopathwalk" +) + +// ProcessEnvSource implements the [Source] interface using the legacy +// [ProcessEnv] abstraction. +type ProcessEnvSource struct { + env *ProcessEnv + srcDir string + filename string + pkgName string +} + +// NewProcessEnvSource returns a [ProcessEnvSource] wrapping the given +// env, to be used for fixing imports in the file with name filename in package +// named pkgName. +func NewProcessEnvSource(env *ProcessEnv, filename, pkgName string) (*ProcessEnvSource, error) { + abs, err := filepath.Abs(filename) + if err != nil { + return nil, err + } + srcDir := filepath.Dir(abs) + return &ProcessEnvSource{ + env: env, + srcDir: srcDir, + filename: filename, + pkgName: pkgName, + }, nil +} + +func (s *ProcessEnvSource) LoadPackageNames(ctx context.Context, srcDir string, unknown []string) (map[string]string, error) { + r, err := s.env.GetResolver() + if err != nil { + return nil, err + } + return r.loadPackageNames(unknown, srcDir) +} + +func (s *ProcessEnvSource) ResolveReferences(ctx context.Context, filename string, refs map[string]map[string]bool) ([]*Result, error) { + var mu sync.Mutex + found := make(map[string][]pkgDistance) + callback := &scanCallback{ + rootFound: func(gopathwalk.Root) bool { + return true // We want everything. + }, + dirFound: func(pkg *pkg) bool { + return pkgIsCandidate(filename, refs, pkg) + }, + packageNameLoaded: func(pkg *pkg) bool { + if _, want := refs[pkg.packageName]; !want { + return false + } + if pkg.dir == s.srcDir && s.pkgName == pkg.packageName { + // The candidate is in the same directory and has the + // same package name. Don't try to import ourselves. + return false + } + if !CanUse(filename, pkg.dir) { + return false + } + mu.Lock() + defer mu.Unlock() + found[pkg.packageName] = append(found[pkg.packageName], pkgDistance{pkg, distance(s.srcDir, pkg.dir)}) + return false // We'll do our own loading after we sort. + }, + } + resolver, err := s.env.GetResolver() + if err != nil { + return nil, err + } + if err := resolver.scan(ctx, callback); err != nil { + return nil, err + } + + g, ctx := errgroup.WithContext(ctx) + + searcher := symbolSearcher{ + logf: s.env.logf, + srcDir: s.srcDir, + xtest: strings.HasSuffix(s.pkgName, "_test"), + loadExports: resolver.loadExports, + } + + var resultMu sync.Mutex + results := make(map[string]*Result, len(refs)) + for pkgName, symbols := range refs { + g.Go(func() error { + found, err := searcher.search(ctx, found[pkgName], pkgName, symbols) + if err != nil { + return err + } + if found == nil { + return nil // No matching package. + } + + imp := &ImportInfo{ + ImportPath: found.importPathShort, + } + pkg := &PackageInfo{ + Name: pkgName, + Exports: symbols, + } + resultMu.Lock() + results[pkgName] = &Result{Import: imp, Package: pkg} + resultMu.Unlock() + return nil + }) + } + if err := g.Wait(); err != nil { + return nil, err + } + var ans []*Result + for _, x := range results { + ans = append(ans, x) + } + return ans, nil +} diff --git a/backend/vendor/golang.org/x/tools/internal/imports/source_modindex.go b/backend/vendor/golang.org/x/tools/internal/imports/source_modindex.go new file mode 100644 index 0000000..ca745d4 --- /dev/null +++ b/backend/vendor/golang.org/x/tools/internal/imports/source_modindex.go @@ -0,0 +1,100 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package imports + +import ( + "context" + "sync" + "time" + + "golang.org/x/tools/internal/modindex" +) + +// This code is here rather than in the modindex package +// to avoid import loops + +// TODO(adonovan): this code is only used by a test in this package. +// Can we delete it? Or is there a plan to call NewIndexSource from +// cmd/goimports? + +// implements Source using modindex, so only for module cache. +// +// this is perhaps over-engineered. A new Index is read at first use. +// And then Update is called after every 15 minutes, and a new Index +// is read if the index changed. It is not clear the Mutex is needed. +type IndexSource struct { + modcachedir string + mu sync.Mutex + index *modindex.Index // (access via getIndex) + expires time.Time +} + +// create a new Source. Called from NewView in cache/session.go. +func NewIndexSource(cachedir string) *IndexSource { + return &IndexSource{modcachedir: cachedir} +} + +func (s *IndexSource) LoadPackageNames(ctx context.Context, srcDir string, paths []ImportPath) (map[ImportPath]PackageName, error) { + /// This is used by goimports to resolve the package names of imports of the + // current package, which is irrelevant for the module cache. + return nil, nil +} + +func (s *IndexSource) ResolveReferences(ctx context.Context, filename string, missing References) ([]*Result, error) { + index, err := s.getIndex() + if err != nil { + return nil, err + } + var cs []modindex.Candidate + for pkg, nms := range missing { + for nm := range nms { + x := index.Lookup(pkg, nm, false) + cs = append(cs, x...) + } + } + found := make(map[string]*Result) + for _, c := range cs { + var x *Result + if x = found[c.ImportPath]; x == nil { + x = &Result{ + Import: &ImportInfo{ + ImportPath: c.ImportPath, + Name: "", + }, + Package: &PackageInfo{ + Name: c.PkgName, + Exports: make(map[string]bool), + }, + } + found[c.ImportPath] = x + } + x.Package.Exports[c.Name] = true + } + var ans []*Result + for _, x := range found { + ans = append(ans, x) + } + return ans, nil +} + +func (s *IndexSource) getIndex() (*modindex.Index, error) { + s.mu.Lock() + defer s.mu.Unlock() + + // (s.index = nil => s.expires is zero, + // so the first condition is strictly redundant. + // But it makes the postcondition very clear.) + if s.index == nil || time.Now().After(s.expires) { + index, err := modindex.Update(s.modcachedir) + if err != nil { + return nil, err + } + s.index = index + s.expires = index.ValidAt.Add(15 * time.Minute) // (refresh period) + } + // Inv: s.index != nil + + return s.index, nil +} diff --git a/backend/vendor/golang.org/x/tools/internal/modindex/directories.go b/backend/vendor/golang.org/x/tools/internal/modindex/directories.go new file mode 100644 index 0000000..9a96374 --- /dev/null +++ b/backend/vendor/golang.org/x/tools/internal/modindex/directories.go @@ -0,0 +1,131 @@ +// Copyright 2024 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package modindex + +import ( + "fmt" + "log" + "os" + "path/filepath" + "regexp" + "strings" + "sync" + "time" + + "golang.org/x/mod/semver" + "golang.org/x/tools/internal/gopathwalk" +) + +type directory struct { + path string // relative to GOMODCACHE + importPath string + version string // semantic version +} + +// bestDirByImportPath returns the best directory for each import +// path, where "best" means most recent semantic version. These import +// paths are inferred from the GOMODCACHE-relative dir names in dirs. +func bestDirByImportPath(dirs []string) (map[string]directory, error) { + dirsByPath := make(map[string]directory) + for _, dir := range dirs { + importPath, version, err := dirToImportPathVersion(dir) + if err != nil { + return nil, err + } + new := directory{ + path: dir, + importPath: importPath, + version: version, + } + if old, ok := dirsByPath[importPath]; !ok || compareDirectory(new, old) < 0 { + dirsByPath[importPath] = new + } + } + return dirsByPath, nil +} + +// compareDirectory defines an ordering of path@version directories, +// by descending version, then by ascending path. +func compareDirectory(x, y directory) int { + if sign := -semver.Compare(x.version, y.version); sign != 0 { + return sign // latest first + } + return strings.Compare(string(x.path), string(y.path)) +} + +// modCacheRegexp splits a relpathpath into module, module version, and package. +var modCacheRegexp = regexp.MustCompile(`(.*)@([^/\\]*)(.*)`) + +// dirToImportPathVersion computes import path and semantic version +// from a GOMODCACHE-relative directory name. +func dirToImportPathVersion(dir string) (string, string, error) { + m := modCacheRegexp.FindStringSubmatch(string(dir)) + // m[1] is the module path + // m[2] is the version major.minor.patch(-

 1 && flds[1][1] == 'D',
+			}
+			if px.Type == Func {
+				n, err := strconv.Atoi(flds[2])
+				if err != nil {
+					continue // should never happen
+				}
+				px.Results = int16(n)
+				if len(flds) >= 4 {
+					sig := strings.Split(flds[3], " ")
+					for i := range sig {
+						// $ cannot otherwise occur. removing the spaces
+						// almost works, but for chan struct{}, e.g.
+						sig[i] = strings.Replace(sig[i], "$", " ", -1)
+					}
+					px.Sig = toFields(sig)
+				}
+			}
+			ans = append(ans, px)
+		}
+	}
+	return ans
+}
+
+func toFields(sig []string) []Field {
+	ans := make([]Field, len(sig)/2)
+	for i := range ans {
+		ans[i] = Field{Arg: sig[2*i], Type: sig[2*i+1]}
+	}
+	return ans
+}
+
+// benchmarks show this is measurably better than strings.Split
+// split into first 4 fields separated by single space
+func fastSplit(x string) []string {
+	ans := make([]string, 0, 4)
+	nxt := 0
+	start := 0
+	for i := 0; i < len(x); i++ {
+		if x[i] != ' ' {
+			continue
+		}
+		ans = append(ans, x[start:i])
+		nxt++
+		start = i + 1
+		if nxt >= 3 {
+			break
+		}
+	}
+	ans = append(ans, x[start:])
+	return ans
+}
+
+func asLexType(c byte) LexType {
+	switch c {
+	case 'C':
+		return Const
+	case 'V':
+		return Var
+	case 'T':
+		return Type
+	case 'F':
+		return Func
+	}
+	return -1
+}
diff --git a/backend/vendor/golang.org/x/tools/internal/modindex/modindex.go b/backend/vendor/golang.org/x/tools/internal/modindex/modindex.go
new file mode 100644
index 0000000..5fa285d
--- /dev/null
+++ b/backend/vendor/golang.org/x/tools/internal/modindex/modindex.go
@@ -0,0 +1,119 @@
+// Copyright 2024 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package modindex contains code for building and searching an
+// [Index] of the Go module cache.
+package modindex
+
+// The directory containing the index, returned by
+// [IndexDir], contains a file index-name- that contains the name
+// of the current index. We believe writing that short file is atomic.
+// [Read] reads that file to get the file name of the index.
+// WriteIndex writes an index with a unique name and then
+// writes that name into a new version of index-name-.
+// ( stands for the CurrentVersion of the index format.)
+
+import (
+	"maps"
+	"os"
+	"path/filepath"
+	"slices"
+	"strings"
+	"time"
+
+	"golang.org/x/mod/semver"
+)
+
+// Update updates the index for the specified Go
+// module cache directory, creating it as needed.
+// On success it returns the current index.
+func Update(gomodcache string) (*Index, error) {
+	prev, err := Read(gomodcache)
+	if err != nil {
+		if !os.IsNotExist(err) {
+			return nil, err
+		}
+		prev = nil
+	}
+	return update(gomodcache, prev)
+}
+
+// update builds, writes, and returns the current index.
+//
+// If old is nil, the new index is built from all of GOMODCACHE;
+// otherwise it is built from the old index plus cache updates
+// since the previous index's time.
+func update(gomodcache string, old *Index) (*Index, error) {
+	gomodcache, err := filepath.Abs(gomodcache)
+	if err != nil {
+		return nil, err
+	}
+	new, changed, err := build(gomodcache, old)
+	if err != nil {
+		return nil, err
+	}
+	if old == nil || changed {
+		if err := write(gomodcache, new); err != nil {
+			return nil, err
+		}
+	}
+	return new, nil
+}
+
+// build returns a new index for the specified Go module cache (an
+// absolute path).
+//
+// If an old index is provided, only directories more recent than it
+// that it are scanned; older directories are provided by the old
+// Index.
+//
+// The boolean result indicates whether new entries were found.
+func build(gomodcache string, old *Index) (*Index, bool, error) {
+	// Set the time window.
+	var start time.Time // = dawn of time
+	if old != nil {
+		start = old.ValidAt
+	}
+	now := time.Now()
+	end := now.Add(24 * time.Hour) // safely in the future
+
+	// Enumerate GOMODCACHE package directories.
+	// Choose the best (latest) package for each import path.
+	pkgDirs := findDirs(gomodcache, start, end)
+	dirByPath, err := bestDirByImportPath(pkgDirs)
+	if err != nil {
+		return nil, false, err
+	}
+
+	// For each import path it might occur only in
+	// dirByPath, only in old, or in both.
+	// If both, use the semantically later one.
+	var entries []Entry
+	if old != nil {
+		for _, entry := range old.Entries {
+			dir, ok := dirByPath[entry.ImportPath]
+			if !ok || semver.Compare(dir.version, entry.Version) <= 0 {
+				// New dir is missing or not more recent; use old entry.
+				entries = append(entries, entry)
+				delete(dirByPath, entry.ImportPath)
+			}
+		}
+	}
+
+	// Extract symbol information for all the new directories.
+	newEntries := extractSymbols(gomodcache, maps.Values(dirByPath))
+	entries = append(entries, newEntries...)
+	slices.SortFunc(entries, func(x, y Entry) int {
+		if n := strings.Compare(x.PkgName, y.PkgName); n != 0 {
+			return n
+		}
+		return strings.Compare(x.ImportPath, y.ImportPath)
+	})
+
+	return &Index{
+		GOMODCACHE: gomodcache,
+		ValidAt:    now, // time before the directories were scanned
+		Entries:    entries,
+	}, len(newEntries) > 0, nil
+}
diff --git a/backend/vendor/golang.org/x/tools/internal/modindex/symbols.go b/backend/vendor/golang.org/x/tools/internal/modindex/symbols.go
new file mode 100644
index 0000000..8e9702d
--- /dev/null
+++ b/backend/vendor/golang.org/x/tools/internal/modindex/symbols.go
@@ -0,0 +1,244 @@
+// Copyright 2024 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package modindex
+
+import (
+	"fmt"
+	"go/ast"
+	"go/parser"
+	"go/token"
+	"go/types"
+	"iter"
+	"os"
+	"path/filepath"
+	"runtime"
+	"slices"
+	"strings"
+	"sync"
+
+	"golang.org/x/sync/errgroup"
+)
+
+// The name of a symbol contains information about the symbol:
+//  T for types, TD if the type is deprecated
+//  C for consts, CD if the const is deprecated
+//  V for vars, VD if the var is deprecated
+// and for funcs:  F  ( )*
+// any spaces in  are replaced by $s so that the fields
+// of the name are space separated. F is replaced by FD if the func
+// is deprecated.
+type symbol struct {
+	pkg  string // name of the symbols's package
+	name string // declared name
+	kind string // T, C, V, or F, followed by D if deprecated
+	sig  string // signature information, for F
+}
+
+// extractSymbols returns a (new, unordered) array of Entries, one for
+// each provided package directory, describing its exported symbols.
+func extractSymbols(cwd string, dirs iter.Seq[directory]) []Entry {
+	var (
+		mu      sync.Mutex
+		entries []Entry
+	)
+
+	var g errgroup.Group
+	g.SetLimit(max(2, runtime.GOMAXPROCS(0)/2))
+	for dir := range dirs {
+		g.Go(func() error {
+			thedir := filepath.Join(cwd, string(dir.path))
+			mode := parser.SkipObjectResolution | parser.ParseComments
+
+			// Parse all Go files in dir and extract symbols.
+			dirents, err := os.ReadDir(thedir)
+			if err != nil {
+				return nil // log this someday?
+			}
+			var syms []symbol
+			for _, dirent := range dirents {
+				if !strings.HasSuffix(dirent.Name(), ".go") ||
+					strings.HasSuffix(dirent.Name(), "_test.go") {
+					continue
+				}
+				fname := filepath.Join(thedir, dirent.Name())
+				tr, err := parser.ParseFile(token.NewFileSet(), fname, nil, mode)
+				if err != nil {
+					continue // ignore errors, someday log them?
+				}
+				syms = append(syms, getFileExports(tr)...)
+			}
+
+			// Create an entry for the package.
+			pkg, names := processSyms(syms)
+			if pkg != "" {
+				mu.Lock()
+				defer mu.Unlock()
+				entries = append(entries, Entry{
+					PkgName:    pkg,
+					Dir:        dir.path,
+					ImportPath: dir.importPath,
+					Version:    dir.version,
+					Names:      names,
+				})
+			}
+
+			return nil
+		})
+	}
+	g.Wait() // ignore error
+
+	return entries
+}
+
+func getFileExports(f *ast.File) []symbol {
+	pkg := f.Name.Name
+	if pkg == "main" || pkg == "" {
+		return nil
+	}
+	var ans []symbol
+	// should we look for //go:build ignore?
+	for _, decl := range f.Decls {
+		switch decl := decl.(type) {
+		case *ast.FuncDecl:
+			if decl.Recv != nil {
+				// ignore methods, as we are completing package selections
+				continue
+			}
+			name := decl.Name.Name
+			dtype := decl.Type
+			// not looking at dtype.TypeParams. That is, treating
+			// generic functions just like non-generic ones.
+			sig := dtype.Params
+			kind := "F"
+			if isDeprecated(decl.Doc) {
+				kind += "D"
+			}
+			result := []string{fmt.Sprintf("%d", dtype.Results.NumFields())}
+			for _, x := range sig.List {
+				// This code creates a string representing the type.
+				// TODO(pjw): it may be fragile:
+				// 1. x.Type could be nil, perhaps in ill-formed code
+				// 2. ExprString might someday change incompatibly to
+				//    include struct tags, which can be arbitrary strings
+				if x.Type == nil {
+					// Can this happen without a parse error? (Files with parse
+					// errors are ignored in getSymbols)
+					continue // maybe report this someday
+				}
+				tp := types.ExprString(x.Type)
+				if len(tp) == 0 {
+					// Can this happen?
+					continue // maybe report this someday
+				}
+				// This is only safe if ExprString never returns anything with a $
+				// The only place a $ can occur seems to be in a struct tag, which
+				// can be an arbitrary string literal, and ExprString does not presently
+				// print struct tags. So for this to happen the type of a formal parameter
+				// has to be a explicit struct, e.g. foo(x struct{a int "$"}) and ExprString
+				// would have to show the struct tag. Even testing for this case seems
+				// a waste of effort, but let's remember the possibility
+				if strings.Contains(tp, "$") {
+					continue
+				}
+				tp = strings.Replace(tp, " ", "$", -1)
+				if len(x.Names) == 0 {
+					result = append(result, "_")
+					result = append(result, tp)
+				} else {
+					for _, y := range x.Names {
+						result = append(result, y.Name)
+						result = append(result, tp)
+					}
+				}
+			}
+			sigs := strings.Join(result, " ")
+			if s := newsym(pkg, name, kind, sigs); s != nil {
+				ans = append(ans, *s)
+			}
+		case *ast.GenDecl:
+			depr := isDeprecated(decl.Doc)
+			switch decl.Tok {
+			case token.CONST, token.VAR:
+				tp := "V"
+				if decl.Tok == token.CONST {
+					tp = "C"
+				}
+				if depr {
+					tp += "D"
+				}
+				for _, sp := range decl.Specs {
+					for _, x := range sp.(*ast.ValueSpec).Names {
+						if s := newsym(pkg, x.Name, tp, ""); s != nil {
+							ans = append(ans, *s)
+						}
+					}
+				}
+			case token.TYPE:
+				tp := "T"
+				if depr {
+					tp += "D"
+				}
+				for _, sp := range decl.Specs {
+					if s := newsym(pkg, sp.(*ast.TypeSpec).Name.Name, tp, ""); s != nil {
+						ans = append(ans, *s)
+					}
+				}
+			}
+		}
+	}
+	return ans
+}
+
+func newsym(pkg, name, kind, sig string) *symbol {
+	if len(name) == 0 || !ast.IsExported(name) {
+		return nil
+	}
+	sym := symbol{pkg: pkg, name: name, kind: kind, sig: sig}
+	return &sym
+}
+
+func isDeprecated(doc *ast.CommentGroup) bool {
+	if doc == nil {
+		return false
+	}
+	// go.dev/wiki/Deprecated Paragraph starting 'Deprecated:'
+	// This code fails for /* Deprecated: */, but it's the code from
+	// gopls/internal/analysis/deprecated
+	for line := range strings.SplitSeq(doc.Text(), "\n\n") {
+		if strings.HasPrefix(line, "Deprecated:") {
+			return true
+		}
+	}
+	return false
+}
+
+// return the package name and the value for the symbols.
+// if there are multiple packages, choose one arbitrarily
+// the returned slice is sorted lexicographically
+func processSyms(syms []symbol) (string, []string) {
+	if len(syms) == 0 {
+		return "", nil
+	}
+	slices.SortFunc(syms, func(l, r symbol) int {
+		return strings.Compare(l.name, r.name)
+	})
+	pkg := syms[0].pkg
+	var names []string
+	for _, s := range syms {
+		if s.pkg != pkg {
+			// Symbols came from two files in same dir
+			// with different package declarations.
+			continue
+		}
+		var nx string
+		if s.sig != "" {
+			nx = fmt.Sprintf("%s %s %s", s.name, s.kind, s.sig)
+		} else {
+			nx = fmt.Sprintf("%s %s", s.name, s.kind)
+		}
+		names = append(names, nx)
+	}
+	return pkg, names
+}
diff --git a/backend/vendor/golang.org/x/tools/internal/typesinternal/fx.go b/backend/vendor/golang.org/x/tools/internal/typesinternal/fx.go
new file mode 100644
index 0000000..93acff2
--- /dev/null
+++ b/backend/vendor/golang.org/x/tools/internal/typesinternal/fx.go
@@ -0,0 +1,49 @@
+// Copyright 2025 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package typesinternal
+
+import (
+	"go/ast"
+	"go/token"
+	"go/types"
+)
+
+// NoEffects reports whether the expression has no side effects, i.e., it
+// does not modify the memory state. This function is conservative: it may
+// return false even when the expression has no effect.
+func NoEffects(info *types.Info, expr ast.Expr) bool {
+	noEffects := true
+	ast.Inspect(expr, func(n ast.Node) bool {
+		switch v := n.(type) {
+		case nil, *ast.Ident, *ast.BasicLit, *ast.BinaryExpr, *ast.ParenExpr,
+			*ast.SelectorExpr, *ast.IndexExpr, *ast.SliceExpr, *ast.TypeAssertExpr,
+			*ast.StarExpr, *ast.CompositeLit, *ast.ArrayType, *ast.StructType,
+			*ast.MapType, *ast.InterfaceType, *ast.KeyValueExpr:
+			// No effect
+		case *ast.UnaryExpr:
+			// Channel send <-ch has effects
+			if v.Op == token.ARROW {
+				noEffects = false
+			}
+		case *ast.CallExpr:
+			// Type conversion has no effects
+			if !info.Types[v.Fun].IsType() {
+				// TODO(adonovan): Add a case for built-in functions without side
+				// effects (by using callsPureBuiltin from tools/internal/refactor/inline)
+
+				noEffects = false
+			}
+		case *ast.FuncLit:
+			// A FuncLit has no effects, but do not descend into it.
+			return false
+		default:
+			// All other expressions have effects
+			noEffects = false
+		}
+
+		return noEffects
+	})
+	return noEffects
+}
diff --git a/backend/vendor/golang.org/x/tools/internal/typesinternal/isnamed.go b/backend/vendor/golang.org/x/tools/internal/typesinternal/isnamed.go
new file mode 100644
index 0000000..f2affec
--- /dev/null
+++ b/backend/vendor/golang.org/x/tools/internal/typesinternal/isnamed.go
@@ -0,0 +1,71 @@
+// Copyright 2025 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package typesinternal
+
+import (
+	"go/types"
+	"slices"
+)
+
+// IsTypeNamed reports whether t is (or is an alias for) a
+// package-level defined type with the given package path and one of
+// the given names. It returns false if t is nil.
+//
+// This function avoids allocating the concatenation of "pkg.Name",
+// which is important for the performance of syntax matching.
+func IsTypeNamed(t types.Type, pkgPath string, names ...string) bool {
+	if named, ok := types.Unalias(t).(*types.Named); ok {
+		tname := named.Obj()
+		return tname != nil &&
+			IsPackageLevel(tname) &&
+			tname.Pkg().Path() == pkgPath &&
+			slices.Contains(names, tname.Name())
+	}
+	return false
+}
+
+// IsPointerToNamed reports whether t is (or is an alias for) a pointer to a
+// package-level defined type with the given package path and one of the given
+// names. It returns false if t is not a pointer type.
+func IsPointerToNamed(t types.Type, pkgPath string, names ...string) bool {
+	r := Unpointer(t)
+	if r == t {
+		return false
+	}
+	return IsTypeNamed(r, pkgPath, names...)
+}
+
+// IsFunctionNamed reports whether obj is a package-level function
+// defined in the given package and has one of the given names.
+// It returns false if obj is nil.
+//
+// This function avoids allocating the concatenation of "pkg.Name",
+// which is important for the performance of syntax matching.
+func IsFunctionNamed(obj types.Object, pkgPath string, names ...string) bool {
+	f, ok := obj.(*types.Func)
+	return ok &&
+		IsPackageLevel(obj) &&
+		f.Pkg().Path() == pkgPath &&
+		f.Type().(*types.Signature).Recv() == nil &&
+		slices.Contains(names, f.Name())
+}
+
+// IsMethodNamed reports whether obj is a method defined on a
+// package-level type with the given package and type name, and has
+// one of the given names. It returns false if obj is nil.
+//
+// This function avoids allocating the concatenation of "pkg.TypeName.Name",
+// which is important for the performance of syntax matching.
+func IsMethodNamed(obj types.Object, pkgPath string, typeName string, names ...string) bool {
+	if fn, ok := obj.(*types.Func); ok {
+		if recv := fn.Type().(*types.Signature).Recv(); recv != nil {
+			_, T := ReceiverNamed(recv)
+			return T != nil &&
+				IsTypeNamed(T, pkgPath, typeName) &&
+				slices.Contains(names, fn.Name())
+		}
+	}
+	return false
+}
diff --git a/backend/vendor/google.golang.org/protobuf/internal/genid/name.go b/backend/vendor/google.golang.org/protobuf/internal/genid/name.go
new file mode 100644
index 0000000..224f339
--- /dev/null
+++ b/backend/vendor/google.golang.org/protobuf/internal/genid/name.go
@@ -0,0 +1,12 @@
+// Copyright 2024 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package genid
+
+const (
+	NoUnkeyedLiteral_goname  = "noUnkeyedLiteral"
+	NoUnkeyedLiteralA_goname = "XXX_NoUnkeyedLiteral"
+
+	BuilderSuffix_goname = "_builder"
+)
diff --git a/backend/vendor/google.golang.org/protobuf/internal/strs/strings_unsafe.go b/backend/vendor/google.golang.org/protobuf/internal/strs/strings_unsafe.go
new file mode 100644
index 0000000..42dd6f7
--- /dev/null
+++ b/backend/vendor/google.golang.org/protobuf/internal/strs/strings_unsafe.go
@@ -0,0 +1,71 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package strs
+
+import (
+	"unsafe"
+
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+// UnsafeString returns an unsafe string reference of b.
+// The caller must treat the input slice as immutable.
+//
+// WARNING: Use carefully. The returned result must not leak to the end user
+// unless the input slice is provably immutable.
+func UnsafeString(b []byte) string {
+	return unsafe.String(unsafe.SliceData(b), len(b))
+}
+
+// UnsafeBytes returns an unsafe bytes slice reference of s.
+// The caller must treat returned slice as immutable.
+//
+// WARNING: Use carefully. The returned result must not leak to the end user.
+func UnsafeBytes(s string) []byte {
+	return unsafe.Slice(unsafe.StringData(s), len(s))
+}
+
+// Builder builds a set of strings with shared lifetime.
+// This differs from strings.Builder, which is for building a single string.
+type Builder struct {
+	buf []byte
+}
+
+// AppendFullName is equivalent to protoreflect.FullName.Append,
+// but optimized for large batches where each name has a shared lifetime.
+func (sb *Builder) AppendFullName(prefix protoreflect.FullName, name protoreflect.Name) protoreflect.FullName {
+	n := len(prefix) + len(".") + len(name)
+	if len(prefix) == 0 {
+		n -= len(".")
+	}
+	sb.grow(n)
+	sb.buf = append(sb.buf, prefix...)
+	sb.buf = append(sb.buf, '.')
+	sb.buf = append(sb.buf, name...)
+	return protoreflect.FullName(sb.last(n))
+}
+
+// MakeString is equivalent to string(b), but optimized for large batches
+// with a shared lifetime.
+func (sb *Builder) MakeString(b []byte) string {
+	sb.grow(len(b))
+	sb.buf = append(sb.buf, b...)
+	return sb.last(len(b))
+}
+
+func (sb *Builder) grow(n int) {
+	if cap(sb.buf)-len(sb.buf) >= n {
+		return
+	}
+
+	// Unlike strings.Builder, we do not need to copy over the contents
+	// of the old buffer since our builder provides no API for
+	// retrieving previously created strings.
+	sb.buf = make([]byte, 0, 2*(cap(sb.buf)+n))
+}
+
+func (sb *Builder) last(n int) string {
+	return UnsafeString(sb.buf[len(sb.buf)-n:])
+}
diff --git a/backend/vendor/google.golang.org/protobuf/proto/wrapperopaque.go b/backend/vendor/google.golang.org/protobuf/proto/wrapperopaque.go
new file mode 100644
index 0000000..267fd0f
--- /dev/null
+++ b/backend/vendor/google.golang.org/protobuf/proto/wrapperopaque.go
@@ -0,0 +1,80 @@
+// Copyright 2024 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proto
+
+// ValueOrNil returns nil if has is false, or a pointer to a new variable
+// containing the value returned by the specified getter.
+//
+// This function is similar to the wrappers (proto.Int32(), proto.String(),
+// etc.), but is generic (works for any field type) and works with the hasser
+// and getter of a field, as opposed to a value.
+//
+// This is convenient when populating builder fields.
+//
+// Example:
+//
+//	hop := attr.GetDirectHop()
+//	injectedRoute := ripb.InjectedRoute_builder{
+//	  Prefixes: route.GetPrefixes(),
+//	  NextHop:  proto.ValueOrNil(hop.HasAddress(), hop.GetAddress),
+//	}
+func ValueOrNil[T any](has bool, getter func() T) *T {
+	if !has {
+		return nil
+	}
+	v := getter()
+	return &v
+}
+
+// ValueOrDefault returns the protobuf message val if val is not nil, otherwise
+// it returns a pointer to an empty val message.
+//
+// This function allows for translating code from the old Open Struct API to the
+// new Opaque API.
+//
+// The old Open Struct API represented oneof fields with a wrapper struct:
+//
+//	var signedImg *accountpb.SignedImage
+//	profile := &accountpb.Profile{
+//		// The Avatar oneof will be set, with an empty SignedImage.
+//		Avatar: &accountpb.Profile_SignedImage{signedImg},
+//	}
+//
+// The new Opaque API treats oneof fields like regular fields, there are no more
+// wrapper structs:
+//
+//	var signedImg *accountpb.SignedImage
+//	profile := &accountpb.Profile{}
+//	profile.SetSignedImage(signedImg)
+//
+// For convenience, the Opaque API also offers Builders, which allow for a
+// direct translation of struct initialization. However, because Builders use
+// nilness to represent field presence (but there is no non-nil wrapper struct
+// anymore), Builders cannot distinguish between an unset oneof and a set oneof
+// with nil message. The above code would need to be translated with help of the
+// ValueOrDefault function to retain the same behavior:
+//
+//	var signedImg *accountpb.SignedImage
+//	return &accountpb.Profile_builder{
+//		SignedImage: proto.ValueOrDefault(signedImg),
+//	}.Build()
+func ValueOrDefault[T interface {
+	*P
+	Message
+}, P any](val T) T {
+	if val == nil {
+		return T(new(P))
+	}
+	return val
+}
+
+// ValueOrDefaultBytes is like ValueOrDefault but for working with fields of
+// type []byte.
+func ValueOrDefaultBytes(val []byte) []byte {
+	if val == nil {
+		return []byte{}
+	}
+	return val
+}
diff --git a/backend/vendor/google.golang.org/protobuf/reflect/protoreflect/value_unsafe.go b/backend/vendor/google.golang.org/protobuf/reflect/protoreflect/value_unsafe.go
new file mode 100644
index 0000000..fe17f37
--- /dev/null
+++ b/backend/vendor/google.golang.org/protobuf/reflect/protoreflect/value_unsafe.go
@@ -0,0 +1,84 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package protoreflect
+
+import (
+	"unsafe"
+
+	"google.golang.org/protobuf/internal/pragma"
+)
+
+type (
+	ifaceHeader struct {
+		_    [0]any // if interfaces have greater alignment than unsafe.Pointer, this will enforce it.
+		Type unsafe.Pointer
+		Data unsafe.Pointer
+	}
+)
+
+var (
+	nilType     = typeOf(nil)
+	boolType    = typeOf(*new(bool))
+	int32Type   = typeOf(*new(int32))
+	int64Type   = typeOf(*new(int64))
+	uint32Type  = typeOf(*new(uint32))
+	uint64Type  = typeOf(*new(uint64))
+	float32Type = typeOf(*new(float32))
+	float64Type = typeOf(*new(float64))
+	stringType  = typeOf(*new(string))
+	bytesType   = typeOf(*new([]byte))
+	enumType    = typeOf(*new(EnumNumber))
+)
+
+// typeOf returns a pointer to the Go type information.
+// The pointer is comparable and equal if and only if the types are identical.
+func typeOf(t any) unsafe.Pointer {
+	return (*ifaceHeader)(unsafe.Pointer(&t)).Type
+}
+
+// value is a union where only one type can be represented at a time.
+// The struct is 24B large on 64-bit systems and requires the minimum storage
+// necessary to represent each possible type.
+//
+// The Go GC needs to be able to scan variables containing pointers.
+// As such, pointers and non-pointers cannot be intermixed.
+type value struct {
+	pragma.DoNotCompare // 0B
+
+	// typ stores the type of the value as a pointer to the Go type.
+	typ unsafe.Pointer // 8B
+
+	// ptr stores the data pointer for a String, Bytes, or interface value.
+	ptr unsafe.Pointer // 8B
+
+	// num stores a Bool, Int32, Int64, Uint32, Uint64, Float32, Float64, or
+	// Enum value as a raw uint64.
+	//
+	// It is also used to store the length of a String or Bytes value;
+	// the capacity is ignored.
+	num uint64 // 8B
+}
+
+func valueOfString(v string) Value {
+	return Value{typ: stringType, ptr: unsafe.Pointer(unsafe.StringData(v)), num: uint64(len(v))}
+}
+func valueOfBytes(v []byte) Value {
+	return Value{typ: bytesType, ptr: unsafe.Pointer(unsafe.SliceData(v)), num: uint64(len(v))}
+}
+func valueOfIface(v any) Value {
+	p := (*ifaceHeader)(unsafe.Pointer(&v))
+	return Value{typ: p.Type, ptr: p.Data}
+}
+
+func (v Value) getString() string {
+	return unsafe.String((*byte)(v.ptr), v.num)
+}
+func (v Value) getBytes() []byte {
+	return unsafe.Slice((*byte)(v.ptr), v.num)
+}
+func (v Value) getIface() (x any) {
+	*(*ifaceHeader)(unsafe.Pointer(&x)) = ifaceHeader{Type: v.typ, Data: v.ptr}
+	return x
+}